Index: head/sys/cddl/compat/opensolaris/sys/vfs.h =================================================================== --- head/sys/cddl/compat/opensolaris/sys/vfs.h (revision 297512) +++ head/sys/cddl/compat/opensolaris/sys/vfs.h (revision 297513) @@ -1,136 +1,125 @@ /*- * Copyright (c) 2007 Pawel Jakub Dawidek * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _OPENSOLARIS_SYS_VFS_H_ #define _OPENSOLARIS_SYS_VFS_H_ #include #ifdef _KERNEL #include #include #define rootdir rootvnode typedef struct mount vfs_t; #define vfs_flag mnt_flag #define vfs_data mnt_data #define vfs_count mnt_ref #define vfs_fsid mnt_stat.f_fsid #define vfs_bsize mnt_stat.f_bsize #define vfs_resource mnt_stat.f_mntfromname #define v_flag v_vflag #define v_vfsp v_mount #define VFS_RDONLY MNT_RDONLY #define VFS_NOSETUID MNT_NOSUID #define VFS_NOEXEC MNT_NOEXEC -#define VFS_HOLD(vfsp) do { \ - MNT_ILOCK(vfsp); \ - MNT_REF(vfsp); \ - MNT_IUNLOCK(vfsp); \ -} while (0) -#define VFS_RELE(vfsp) do { \ - MNT_ILOCK(vfsp); \ - MNT_REL(vfsp); \ - MNT_IUNLOCK(vfsp); \ -} while (0) - #define fs_vscan(vp, cr, async) (0) #define VROOT VV_ROOT /* * Structure defining a mount option for a filesystem. * option names are found in mntent.h */ typedef struct mntopt { char *mo_name; /* option name */ char **mo_cancel; /* list of options cancelled by this one */ char *mo_arg; /* argument string for this option */ int mo_flags; /* flags for this mount option */ void *mo_data; /* filesystem specific data */ } mntopt_t; /* * Flags that apply to mount options */ #define MO_SET 0x01 /* option is set */ #define MO_NODISPLAY 0x02 /* option not listed in mnttab */ #define MO_HASVALUE 0x04 /* option takes a value */ #define MO_IGNORE 0x08 /* option ignored by parser */ #define MO_DEFAULT MO_SET /* option is on by default */ #define MO_TAG 0x10 /* flags a tag set by user program */ #define MO_EMPTY 0x20 /* empty space in option table */ #define VFS_NOFORCEOPT 0x01 /* honor MO_IGNORE (don't set option) */ #define VFS_DISPLAY 0x02 /* Turn off MO_NODISPLAY bit for opt */ #define VFS_NODISPLAY 0x04 /* Turn on MO_NODISPLAY bit for opt */ #define VFS_CREATEOPT 0x08 /* Create the opt if it's not there */ /* * Structure holding mount option strings for the mounted file system. */ typedef struct mntopts { uint_t mo_count; /* number of entries in table */ mntopt_t *mo_list; /* list of mount options */ } mntopts_t; void vfs_setmntopt(vfs_t *vfsp, const char *name, const char *arg, int flags __unused); void vfs_clearmntopt(vfs_t *vfsp, const char *name); int vfs_optionisset(const vfs_t *vfsp, const char *opt, char **argp); int mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath, char *fspec, int fsflags); typedef uint64_t vfs_feature_t; #define VFSFT_XVATTR 0x100000001 /* Supports xvattr for attrs */ #define VFSFT_CASEINSENSITIVE 0x100000002 /* Supports case-insensitive */ #define VFSFT_NOCASESENSITIVE 0x100000004 /* NOT case-sensitive */ #define VFSFT_DIRENTFLAGS 0x100000008 /* Supports dirent flags */ #define VFSFT_ACLONCREATE 0x100000010 /* Supports ACL on create */ #define VFSFT_ACEMASKONACCESS 0x100000020 /* Can use ACEMASK for access */ #define VFSFT_SYSATTR_VIEWS 0x100000040 /* Supports sysattr view i/f */ #define VFSFT_ACCESS_FILTER 0x100000080 /* dirents filtered by access */ #define VFSFT_REPARSE 0x100000100 /* Supports reparse point */ #define VFSFT_ZEROCOPY_SUPPORTED 0x100000200 /* Support loaning /returning cache buffer */ #define vfs_set_feature(vfsp, feature) do { } while (0) #define vfs_clear_feature(vfsp, feature) do { } while (0) #define vfs_has_feature(vfsp, feature) (0) #endif /* _KERNEL */ #endif /* _OPENSOLARIS_SYS_VFS_H_ */ Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c =================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c (revision 297512) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c (revision 297513) @@ -1,1252 +1,1256 @@ /* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* Portions Copyright 2007 Shivakumar GN */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Generic pseudo-filesystem routines. * * There are significant similarities between the implementation of certain file * system entry points across different filesystems. While one could attempt to * "choke up on the bat" and incorporate common functionality into a VOP * preamble or postamble, such an approach is limited in the benefit it can * provide. In this file we instead define a toolkit of routines which can be * called from a filesystem (with in-kernel pseudo-filesystems being the focus * of the exercise) in a more component-like fashion. * * There are three basic classes of routines: * * 1) Lowlevel support routines * * These routines are designed to play a support role for existing * pseudo-filesystems (such as procfs). They simplify common tasks, * without forcing the filesystem to hand over management to GFS. The * routines covered are: * * gfs_readdir_init() * gfs_readdir_emit() * gfs_readdir_emitn() * gfs_readdir_pred() * gfs_readdir_fini() * gfs_lookup_dot() * * 2) Complete GFS management * * These routines take a more active role in management of the * pseudo-filesystem. They handle the relationship between vnode private * data and VFS data, as well as the relationship between vnodes in the * directory hierarchy. * * In order to use these interfaces, the first member of every private * v_data must be a gfs_file_t or a gfs_dir_t. This hands over all control * to GFS. * * gfs_file_create() * gfs_dir_create() * gfs_root_create() * * gfs_file_inactive() * gfs_dir_inactive() * gfs_dir_lookup() * gfs_dir_readdir() * * gfs_vop_reclaim() * gfs_vop_lookup() * gfs_vop_readdir() * gfs_vop_map() * * 3) Single File pseudo-filesystems * * This routine creates a rooted file to be overlayed ontop of another * file in the physical filespace. * * Note that the parent is NULL (actually the vfs), but there is nothing * technically keeping such a file from utilizing the "Complete GFS * management" set of routines. * * gfs_root_create_file() */ #ifdef illumos /* * gfs_make_opsvec: take an array of vnode type definitions and create * their vnodeops_t structures * * This routine takes an array of gfs_opsvec_t's. It could * alternatively take an array of gfs_opsvec_t*'s, which would allow * vnode types to be completely defined in files external to the caller * of gfs_make_opsvec(). As it stands, much more sharing takes place -- * both the caller and the vnode type provider need to access gfsv_ops * and gfsv_template, and the caller also needs to know gfsv_name. */ int gfs_make_opsvec(gfs_opsvec_t *vec) { int error, i; for (i = 0; ; i++) { if (vec[i].gfsv_name == NULL) return (0); error = vn_make_ops(vec[i].gfsv_name, vec[i].gfsv_template, vec[i].gfsv_ops); if (error) break; } cmn_err(CE_WARN, "gfs_make_opsvec: bad vnode ops template for '%s'", vec[i].gfsv_name); for (i--; i >= 0; i--) { vn_freevnodeops(*vec[i].gfsv_ops); *vec[i].gfsv_ops = NULL; } return (error); } #endif /* illumos */ /* * Low level directory routines * * These routines provide some simple abstractions for reading directories. * They are designed to be used by existing pseudo filesystems (namely procfs) * that already have a complicated management infrastructure. */ /* * gfs_get_parent_ino: used to obtain a parent inode number and the * inode number of the given vnode in preparation for calling gfs_readdir_init. */ int gfs_get_parent_ino(vnode_t *dvp, cred_t *cr, caller_context_t *ct, ino64_t *pino, ino64_t *ino) { vnode_t *parent; gfs_dir_t *dp = dvp->v_data; int error; *ino = dp->gfsd_file.gfs_ino; parent = dp->gfsd_file.gfs_parent; if (parent == NULL) { *pino = *ino; /* root of filesystem */ } else if (dvp->v_flag & V_XATTRDIR) { #ifdef TODO vattr_t va; va.va_mask = AT_NODEID; error = VOP_GETATTR(parent, &va, 0, cr, ct); if (error) return (error); *pino = va.va_nodeid; #else panic("%s:%u: not implemented", __func__, __LINE__); #endif } else { *pino = ((gfs_file_t *)(parent->v_data))->gfs_ino; } return (0); } /* * gfs_readdir_init: initiate a generic readdir * st - a pointer to an uninitialized gfs_readdir_state_t structure * name_max - the directory's maximum file name length * ureclen - the exported file-space record length (1 for non-legacy FSs) * uiop - the uiop passed to readdir * parent - the parent directory's inode * self - this directory's inode * flags - flags from VOP_READDIR * * Returns 0 or a non-zero errno. * * Typical VOP_READDIR usage of gfs_readdir_*: * * if ((error = gfs_readdir_init(...)) != 0) * return (error); * eof = 0; * while ((error = gfs_readdir_pred(..., &voffset)) != 0) { * if (!consumer_entry_at(voffset)) * voffset = consumer_next_entry(voffset); * if (consumer_eof(voffset)) { * eof = 1 * break; * } * if ((error = gfs_readdir_emit(..., voffset, * consumer_ino(voffset), consumer_name(voffset))) != 0) * break; * } * return (gfs_readdir_fini(..., error, eofp, eof)); * * As you can see, a zero result from gfs_readdir_pred() or * gfs_readdir_emit() indicates that processing should continue, * whereas a non-zero result indicates that the loop should terminate. * Most consumers need do nothing more than let gfs_readdir_fini() * determine what the cause of failure was and return the appropriate * value. */ int gfs_readdir_init(gfs_readdir_state_t *st, int name_max, int ureclen, uio_t *uiop, ino64_t parent, ino64_t self, int flags) { size_t dirent_size; if (uiop->uio_loffset < 0 || uiop->uio_resid <= 0 || (uiop->uio_loffset % ureclen) != 0) return (EINVAL); st->grd_ureclen = ureclen; st->grd_oresid = uiop->uio_resid; st->grd_namlen = name_max; if (flags & V_RDDIR_ENTFLAGS) dirent_size = EDIRENT_RECLEN(st->grd_namlen); else dirent_size = DIRENT64_RECLEN(st->grd_namlen); st->grd_dirent = kmem_zalloc(dirent_size, KM_SLEEP); st->grd_parent = parent; st->grd_self = self; st->grd_flags = flags; return (0); } /* * gfs_readdir_emit_int: internal routine to emit directory entry * * st - the current readdir state, which must have d_ino/ed_ino * and d_name/ed_name set * uiop - caller-supplied uio pointer * next - the offset of the next entry */ static int gfs_readdir_emit_int(gfs_readdir_state_t *st, uio_t *uiop, offset_t next, int *ncookies, u_long **cookies) { int reclen, namlen; dirent64_t *dp; edirent_t *edp; if (st->grd_flags & V_RDDIR_ENTFLAGS) { edp = st->grd_dirent; namlen = strlen(edp->ed_name); reclen = EDIRENT_RECLEN(namlen); } else { dp = st->grd_dirent; namlen = strlen(dp->d_name); reclen = DIRENT64_RECLEN(namlen); } if (reclen > uiop->uio_resid) { /* * Error if no entries were returned yet */ if (uiop->uio_resid == st->grd_oresid) return (EINVAL); return (-1); } if (st->grd_flags & V_RDDIR_ENTFLAGS) { edp->ed_off = next; edp->ed_reclen = (ushort_t)reclen; } else { /* XXX: This can change in the future. */ dp->d_reclen = (ushort_t)reclen; dp->d_type = DT_DIR; dp->d_namlen = namlen; } if (uiomove((caddr_t)st->grd_dirent, reclen, UIO_READ, uiop)) return (EFAULT); uiop->uio_loffset = next; if (*cookies != NULL) { **cookies = next; (*cookies)++; (*ncookies)--; KASSERT(*ncookies >= 0, ("ncookies=%d", *ncookies)); } return (0); } /* * gfs_readdir_emit: emit a directory entry * voff - the virtual offset (obtained from gfs_readdir_pred) * ino - the entry's inode * name - the entry's name * eflags - value for ed_eflags (if processing edirent_t) * * Returns a 0 on success, a non-zero errno on failure, or -1 if the * readdir loop should terminate. A non-zero result (either errno or * -1) from this function is typically passed directly to * gfs_readdir_fini(). */ int gfs_readdir_emit(gfs_readdir_state_t *st, uio_t *uiop, offset_t voff, ino64_t ino, const char *name, int eflags, int *ncookies, u_long **cookies) { offset_t off = (voff + 2) * st->grd_ureclen; if (st->grd_flags & V_RDDIR_ENTFLAGS) { edirent_t *edp = st->grd_dirent; edp->ed_ino = ino; (void) strncpy(edp->ed_name, name, st->grd_namlen); edp->ed_eflags = eflags; } else { dirent64_t *dp = st->grd_dirent; dp->d_ino = ino; (void) strncpy(dp->d_name, name, st->grd_namlen); } /* * Inter-entry offsets are invalid, so we assume a record size of * grd_ureclen and explicitly set the offset appropriately. */ return (gfs_readdir_emit_int(st, uiop, off + st->grd_ureclen, ncookies, cookies)); } #ifdef illumos /* * gfs_readdir_emitn: like gfs_readdir_emit(), but takes an integer * instead of a string for the entry's name. */ int gfs_readdir_emitn(gfs_readdir_state_t *st, uio_t *uiop, offset_t voff, ino64_t ino, unsigned long num) { char buf[40]; numtos(num, buf); return (gfs_readdir_emit(st, uiop, voff, ino, buf, 0)); } #endif /* * gfs_readdir_pred: readdir loop predicate * voffp - a pointer in which the next virtual offset should be stored * * Returns a 0 on success, a non-zero errno on failure, or -1 if the * readdir loop should terminate. A non-zero result (either errno or * -1) from this function is typically passed directly to * gfs_readdir_fini(). */ int gfs_readdir_pred(gfs_readdir_state_t *st, uio_t *uiop, offset_t *voffp, int *ncookies, u_long **cookies) { offset_t off, voff; int error; top: if (uiop->uio_resid <= 0) return (-1); off = uiop->uio_loffset / st->grd_ureclen; voff = off - 2; if (off == 0) { if ((error = gfs_readdir_emit(st, uiop, voff, st->grd_self, ".", 0, ncookies, cookies)) == 0) goto top; } else if (off == 1) { if ((error = gfs_readdir_emit(st, uiop, voff, st->grd_parent, "..", 0, ncookies, cookies)) == 0) goto top; } else { *voffp = voff; return (0); } return (error); } /* * gfs_readdir_fini: generic readdir cleanup * error - if positive, an error to return * eofp - the eofp passed to readdir * eof - the eof value * * Returns a 0 on success, a non-zero errno on failure. This result * should be returned from readdir. */ int gfs_readdir_fini(gfs_readdir_state_t *st, int error, int *eofp, int eof) { size_t dirent_size; if (st->grd_flags & V_RDDIR_ENTFLAGS) dirent_size = EDIRENT_RECLEN(st->grd_namlen); else dirent_size = DIRENT64_RECLEN(st->grd_namlen); kmem_free(st->grd_dirent, dirent_size); if (error > 0) return (error); if (eofp) *eofp = eof; return (0); } /* * gfs_lookup_dot * * Performs a basic check for "." and ".." directory entries. */ int gfs_lookup_dot(vnode_t **vpp, vnode_t *dvp, vnode_t *pvp, const char *nm) { int ltype; if (*nm == '\0' || strcmp(nm, ".") == 0) { VN_HOLD(dvp); *vpp = dvp; return (0); } else if (strcmp(nm, "..") == 0) { if (pvp == NULL) { ASSERT(dvp->v_flag & VROOT); VN_HOLD(dvp); *vpp = dvp; ASSERT_VOP_ELOCKED(dvp, "gfs_lookup_dot: non-locked dvp"); } else { ltype = VOP_ISLOCKED(dvp); VOP_UNLOCK(dvp, 0); VN_HOLD(pvp); *vpp = pvp; vn_lock(*vpp, LK_EXCLUSIVE | LK_RETRY); vn_lock(dvp, ltype | LK_RETRY); } return (0); } return (-1); } /* * gfs_file_create(): create a new GFS file * * size - size of private data structure (v_data) * pvp - parent vnode (GFS directory) * ops - vnode operations vector * * In order to use this interface, the parent vnode must have been created by * gfs_dir_create(), and the private data stored in v_data must have a * 'gfs_file_t' as its first field. * * Given these constraints, this routine will automatically: * * - Allocate v_data for the vnode * - Initialize necessary fields in the vnode * - Hold the parent */ vnode_t * gfs_file_create(size_t size, vnode_t *pvp, vfs_t *vfsp, vnodeops_t *ops) { gfs_file_t *fp; vnode_t *vp; int error; /* * Allocate vnode and internal data structure */ fp = kmem_zalloc(size, KM_SLEEP); error = getnewvnode("zfs_gfs", vfsp, ops, &vp); ASSERT(error == 0); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); vp->v_data = (caddr_t)fp; /* * Set up various pointers */ fp->gfs_vnode = vp; fp->gfs_parent = pvp; fp->gfs_size = size; fp->gfs_type = GFS_FILE; vp->v_vflag |= VV_FORCEINSMQ; error = insmntque(vp, vfsp); vp->v_vflag &= ~VV_FORCEINSMQ; KASSERT(error == 0, ("insmntque() failed: error %d", error)); /* * Initialize vnode and hold parent. */ if (pvp) VN_HOLD(pvp); return (vp); } /* * gfs_dir_create: creates a new directory in the parent * * size - size of private data structure (v_data) * pvp - parent vnode (GFS directory) * ops - vnode operations vector * entries - NULL-terminated list of static entries (if any) * maxlen - maximum length of a directory entry * readdir_cb - readdir callback (see gfs_dir_readdir) * inode_cb - inode callback (see gfs_dir_readdir) * lookup_cb - lookup callback (see gfs_dir_lookup) * * In order to use this function, the first member of the private vnode * structure (v_data) must be a gfs_dir_t. For each directory, there are * static entries, defined when the structure is initialized, and dynamic * entries, retrieved through callbacks. * * If a directory has static entries, then it must supply a inode callback, * which will compute the inode number based on the parent and the index. * For a directory with dynamic entries, the caller must supply a readdir * callback and a lookup callback. If a static lookup fails, we fall back to * the supplied lookup callback, if any. * * This function also performs the same initialization as gfs_file_create(). */ vnode_t * gfs_dir_create(size_t struct_size, vnode_t *pvp, vfs_t *vfsp, vnodeops_t *ops, gfs_dirent_t *entries, gfs_inode_cb inode_cb, int maxlen, gfs_readdir_cb readdir_cb, gfs_lookup_cb lookup_cb) { vnode_t *vp; gfs_dir_t *dp; gfs_dirent_t *de; vp = gfs_file_create(struct_size, pvp, vfsp, ops); vp->v_type = VDIR; dp = vp->v_data; dp->gfsd_file.gfs_type = GFS_DIR; dp->gfsd_maxlen = maxlen; if (entries != NULL) { for (de = entries; de->gfse_name != NULL; de++) dp->gfsd_nstatic++; dp->gfsd_static = kmem_alloc( dp->gfsd_nstatic * sizeof (gfs_dirent_t), KM_SLEEP); bcopy(entries, dp->gfsd_static, dp->gfsd_nstatic * sizeof (gfs_dirent_t)); } dp->gfsd_readdir = readdir_cb; dp->gfsd_lookup = lookup_cb; dp->gfsd_inode = inode_cb; mutex_init(&dp->gfsd_lock, NULL, MUTEX_DEFAULT, NULL); return (vp); } /* * gfs_root_create(): create a root vnode for a GFS filesystem * * Similar to gfs_dir_create(), this creates a root vnode for a filesystem. The * only difference is that it takes a vfs_t instead of a vnode_t as its parent. */ vnode_t * gfs_root_create(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino, gfs_dirent_t *entries, gfs_inode_cb inode_cb, int maxlen, gfs_readdir_cb readdir_cb, gfs_lookup_cb lookup_cb) { vnode_t *vp; +#ifdef illumos VFS_HOLD(vfsp); +#endif vp = gfs_dir_create(size, NULL, vfsp, ops, entries, inode_cb, maxlen, readdir_cb, lookup_cb); /* Manually set the inode */ ((gfs_file_t *)vp->v_data)->gfs_ino = ino; vp->v_flag |= VROOT; return (vp); } #ifdef illumos /* * gfs_root_create_file(): create a root vnode for a GFS file as a filesystem * * Similar to gfs_root_create(), this creates a root vnode for a file to * be the pseudo-filesystem. */ vnode_t * gfs_root_create_file(size_t size, vfs_t *vfsp, vnodeops_t *ops, ino64_t ino) { vnode_t *vp = gfs_file_create(size, NULL, ops); ((gfs_file_t *)vp->v_data)->gfs_ino = ino; VFS_HOLD(vfsp); VN_SET_VFS_TYPE_DEV(vp, vfsp, VREG, 0); vp->v_flag |= VROOT | VNOCACHE | VNOMAP | VNOSWAP | VNOMOUNT; return (vp); } #endif /* illumos */ /* * gfs_file_inactive() * * Called from the VOP_RECLAIM() routine. If necessary, this routine will * remove the given vnode from the parent directory and clean up any references * in the VFS layer. * * If the vnode was not removed (due to a race with vget), then NULL is * returned. Otherwise, a pointer to the private data is returned. */ void * gfs_file_inactive(vnode_t *vp) { int i; gfs_dirent_t *ge = NULL; gfs_file_t *fp = vp->v_data; gfs_dir_t *dp = NULL; void *data; if (fp->gfs_parent == NULL || (vp->v_flag & V_XATTRDIR)) goto found; /* * XXX cope with a FreeBSD-specific race wherein the parent's * snapshot data can be freed before the parent is */ if ((dp = fp->gfs_parent->v_data) == NULL) return (NULL); /* * First, see if this vnode is cached in the parent. */ gfs_dir_lock(dp); /* * Find it in the set of static entries. */ for (i = 0; i < dp->gfsd_nstatic; i++) { ge = &dp->gfsd_static[i]; if (ge->gfse_vnode == vp) goto found; } /* * If 'ge' is NULL, then it is a dynamic entry. */ ge = NULL; found: #ifdef TODO if (vp->v_flag & V_XATTRDIR) VI_LOCK(fp->gfs_parent); #endif VI_LOCK(vp); /* * Really remove this vnode */ data = vp->v_data; if (ge != NULL) { /* * If this was a statically cached entry, simply set the * cached vnode to NULL. */ ge->gfse_vnode = NULL; } VI_UNLOCK(vp); /* * Free vnode and release parent */ if (fp->gfs_parent) { if (dp) gfs_dir_unlock(dp); VOP_UNLOCK(vp, 0); VN_RELE(fp->gfs_parent); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } else { ASSERT(vp->v_vfsp != NULL); +#ifdef illumos VFS_RELE(vp->v_vfsp); +#endif } #ifdef TODO if (vp->v_flag & V_XATTRDIR) VI_UNLOCK(fp->gfs_parent); #endif return (data); } /* * gfs_dir_inactive() * * Same as above, but for directories. */ void * gfs_dir_inactive(vnode_t *vp) { gfs_dir_t *dp; ASSERT(vp->v_type == VDIR); if ((dp = gfs_file_inactive(vp)) != NULL) { mutex_destroy(&dp->gfsd_lock); if (dp->gfsd_nstatic) kmem_free(dp->gfsd_static, dp->gfsd_nstatic * sizeof (gfs_dirent_t)); } return (dp); } /* * gfs_dir_lookup_dynamic() * * This routine looks up the provided name amongst the dynamic entries * in the gfs directory and returns the corresponding vnode, if found. * * The gfs directory is expected to be locked by the caller prior to * calling this function. The directory will be unlocked during the * execution of this function, but will be locked upon return from the * function. This function returns 0 on success, non-zero on error. * * The dynamic lookups are performed by invoking the lookup * callback, which is passed to this function as the first argument. * The arguments to the callback are: * * int gfs_lookup_cb(vnode_t *pvp, const char *nm, vnode_t **vpp, cred_t *cr, * int flags, int *deflgs, pathname_t *rpnp); * * pvp - parent vnode * nm - name of entry * vpp - pointer to resulting vnode * cr - pointer to cred * flags - flags value from lookup request * ignored here; currently only used to request * insensitive lookups * direntflgs - output parameter, directory entry flags * ignored here; currently only used to indicate a lookup * has more than one possible match when case is not considered * realpnp - output parameter, real pathname * ignored here; when lookup was performed case-insensitively, * this field contains the "real" name of the file. * * Returns 0 on success, non-zero on error. */ static int gfs_dir_lookup_dynamic(gfs_lookup_cb callback, gfs_dir_t *dp, const char *nm, vnode_t *dvp, vnode_t **vpp, cred_t *cr, int flags, int *direntflags, pathname_t *realpnp) { gfs_file_t *fp; ino64_t ino; int ret; ASSERT(GFS_DIR_LOCKED(dp)); /* * Drop the directory lock, as the lookup routine * will need to allocate memory, or otherwise deadlock on this * directory. */ gfs_dir_unlock(dp); ret = callback(dvp, nm, vpp, &ino, cr, flags, direntflags, realpnp); gfs_dir_lock(dp); /* * The callback for extended attributes returns a vnode * with v_data from an underlying fs. */ if (ret == 0 && !IS_XATTRDIR(dvp)) { fp = (gfs_file_t *)((*vpp)->v_data); fp->gfs_index = -1; fp->gfs_ino = ino; } return (ret); } /* * gfs_dir_lookup_static() * * This routine looks up the provided name amongst the static entries * in the gfs directory and returns the corresponding vnode, if found. * The first argument to the function is a pointer to the comparison * function this function should use to decide if names are a match. * * If a match is found, and GFS_CACHE_VNODE is set and the vnode * exists, we simply return the existing vnode. Otherwise, we call * the static entry's callback routine, caching the result if * necessary. If the idx pointer argument is non-NULL, we use it to * return the index of the matching static entry. * * The gfs directory is expected to be locked by the caller prior to calling * this function. The directory may be unlocked during the execution of * this function, but will be locked upon return from the function. * * This function returns 0 if a match is found, ENOENT if not. */ static int gfs_dir_lookup_static(int (*compare)(const char *, const char *), gfs_dir_t *dp, const char *nm, vnode_t *dvp, int *idx, vnode_t **vpp, pathname_t *rpnp) { gfs_dirent_t *ge; vnode_t *vp = NULL; int i; ASSERT(GFS_DIR_LOCKED(dp)); /* * Search static entries. */ for (i = 0; i < dp->gfsd_nstatic; i++) { ge = &dp->gfsd_static[i]; if (compare(ge->gfse_name, nm) == 0) { if (rpnp) (void) strlcpy(rpnp->pn_buf, ge->gfse_name, rpnp->pn_bufsize); if (ge->gfse_vnode) { ASSERT(ge->gfse_flags & GFS_CACHE_VNODE); vp = ge->gfse_vnode; VN_HOLD(vp); break; } /* * We drop the directory lock, as the constructor will * need to do KM_SLEEP allocations. If we return from * the constructor only to find that a parallel * operation has completed, and GFS_CACHE_VNODE is set * for this entry, we discard the result in favor of * the cached vnode. */ gfs_dir_unlock(dp); vp = ge->gfse_ctor(dvp); gfs_dir_lock(dp); ((gfs_file_t *)vp->v_data)->gfs_index = i; /* Set the inode according to the callback. */ ((gfs_file_t *)vp->v_data)->gfs_ino = dp->gfsd_inode(dvp, i); if (ge->gfse_flags & GFS_CACHE_VNODE) { if (ge->gfse_vnode == NULL) { ge->gfse_vnode = vp; } else { /* * A parallel constructor beat us to it; * return existing vnode. We have to be * careful because we can't release the * current vnode while holding the * directory lock; its inactive routine * will try to lock this directory. */ vnode_t *oldvp = vp; vp = ge->gfse_vnode; VN_HOLD(vp); gfs_dir_unlock(dp); VN_RELE(oldvp); gfs_dir_lock(dp); } } break; } } if (vp == NULL) return (ENOENT); else if (idx) *idx = i; *vpp = vp; return (0); } /* * gfs_dir_lookup() * * Looks up the given name in the directory and returns the corresponding * vnode, if found. * * First, we search statically defined entries, if any, with a call to * gfs_dir_lookup_static(). If no static entry is found, and we have * a callback function we try a dynamic lookup via gfs_dir_lookup_dynamic(). * * This function returns 0 on success, non-zero on error. */ int gfs_dir_lookup(vnode_t *dvp, const char *nm, vnode_t **vpp, cred_t *cr, int flags, int *direntflags, pathname_t *realpnp) { gfs_dir_t *dp = dvp->v_data; boolean_t casecheck; vnode_t *dynvp = NULL; vnode_t *vp = NULL; int (*compare)(const char *, const char *); int error, idx; ASSERT(dvp->v_type == VDIR); if (gfs_lookup_dot(vpp, dvp, dp->gfsd_file.gfs_parent, nm) == 0) return (0); casecheck = (flags & FIGNORECASE) != 0 && direntflags != NULL; if (vfs_has_feature(dvp->v_vfsp, VFSFT_NOCASESENSITIVE) || (flags & FIGNORECASE)) compare = strcasecmp; else compare = strcmp; gfs_dir_lock(dp); error = gfs_dir_lookup_static(compare, dp, nm, dvp, &idx, &vp, realpnp); if (vp && casecheck) { gfs_dirent_t *ge; int i; for (i = idx + 1; i < dp->gfsd_nstatic; i++) { ge = &dp->gfsd_static[i]; if (strcasecmp(ge->gfse_name, nm) == 0) { *direntflags |= ED_CASE_CONFLICT; goto out; } } } if ((error || casecheck) && dp->gfsd_lookup) error = gfs_dir_lookup_dynamic(dp->gfsd_lookup, dp, nm, dvp, &dynvp, cr, flags, direntflags, vp ? NULL : realpnp); if (vp && dynvp) { /* static and dynamic entries are case-insensitive conflict */ ASSERT(casecheck); *direntflags |= ED_CASE_CONFLICT; VN_RELE(dynvp); } else if (vp == NULL) { vp = dynvp; } else if (error == ENOENT) { error = 0; } else if (error) { VN_RELE(vp); vp = NULL; } out: gfs_dir_unlock(dp); *vpp = vp; return (error); } /* * gfs_dir_readdir: does a readdir() on the given directory * * dvp - directory vnode * uiop - uio structure * eofp - eof pointer * data - arbitrary data passed to readdir callback * * This routine does all the readdir() dirty work. Even so, the caller must * supply two callbacks in order to get full compatibility. * * If the directory contains static entries, an inode callback must be * specified. This avoids having to create every vnode and call VOP_GETATTR() * when reading the directory. This function has the following arguments: * * ino_t gfs_inode_cb(vnode_t *vp, int index); * * vp - vnode for the directory * index - index in original gfs_dirent_t array * * Returns the inode number for the given entry. * * For directories with dynamic entries, a readdir callback must be provided. * This is significantly more complex, thanks to the particulars of * VOP_READDIR(). * * int gfs_readdir_cb(vnode_t *vp, void *dp, int *eofp, * offset_t *off, offset_t *nextoff, void *data, int flags) * * vp - directory vnode * dp - directory entry, sized according to maxlen given to * gfs_dir_create(). callback must fill in d_name and * d_ino (if a dirent64_t), or ed_name, ed_ino, and ed_eflags * (if an edirent_t). edirent_t is used if V_RDDIR_ENTFLAGS * is set in 'flags'. * eofp - callback must set to 1 when EOF has been reached * off - on entry, the last offset read from the directory. Callback * must set to the offset of the current entry, typically left * untouched. * nextoff - callback must set to offset of next entry. Typically * (off + 1) * data - caller-supplied data * flags - VOP_READDIR flags * * Return 0 on success, or error on failure. */ int gfs_dir_readdir(vnode_t *dvp, uio_t *uiop, int *eofp, int *ncookies, u_long **cookies, void *data, cred_t *cr, int flags) { gfs_readdir_state_t gstate; int error, eof = 0; ino64_t ino, pino; offset_t off, next; gfs_dir_t *dp = dvp->v_data; error = gfs_get_parent_ino(dvp, cr, NULL, &pino, &ino); if (error) return (error); if ((error = gfs_readdir_init(&gstate, dp->gfsd_maxlen, 1, uiop, pino, ino, flags)) != 0) return (error); while ((error = gfs_readdir_pred(&gstate, uiop, &off, ncookies, cookies)) == 0 && !eof) { if (off >= 0 && off < dp->gfsd_nstatic) { ino = dp->gfsd_inode(dvp, off); if ((error = gfs_readdir_emit(&gstate, uiop, off, ino, dp->gfsd_static[off].gfse_name, 0, ncookies, cookies)) != 0) break; } else if (dp->gfsd_readdir) { off -= dp->gfsd_nstatic; if ((error = dp->gfsd_readdir(dvp, gstate.grd_dirent, &eof, &off, &next, data, flags)) != 0 || eof) break; off += dp->gfsd_nstatic + 2; next += dp->gfsd_nstatic + 2; if ((error = gfs_readdir_emit_int(&gstate, uiop, next, ncookies, cookies)) != 0) break; } else { /* * Offset is beyond the end of the static entries, and * we have no dynamic entries. Set EOF. */ eof = 1; } } return (gfs_readdir_fini(&gstate, error, eofp, eof)); } /* * gfs_vop_lookup: VOP_LOOKUP() entry point * * For use directly in vnode ops table. Given a GFS directory, calls * gfs_dir_lookup() as necessary. */ /* ARGSUSED */ int gfs_vop_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp, int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, int *direntflags, pathname_t *realpnp) { return (gfs_dir_lookup(dvp, nm, vpp, cr, flags, direntflags, realpnp)); } /* * gfs_vop_readdir: VOP_READDIR() entry point * * For use directly in vnode ops table. Given a GFS directory, calls * gfs_dir_readdir() as necessary. */ /* ARGSUSED */ int gfs_vop_readdir(ap) struct vop_readdir_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; int *a_eofflag; int *ncookies; u_long **a_cookies; } */ *ap; { vnode_t *vp = ap->a_vp; uio_t *uiop = ap->a_uio; cred_t *cr = ap->a_cred; int *eofp = ap->a_eofflag; int ncookies = 0; u_long *cookies = NULL; int error; if (ap->a_ncookies) { /* * Minimum entry size is dirent size and 1 byte for a file name. */ ncookies = uiop->uio_resid / (sizeof(struct dirent) - sizeof(((struct dirent *)NULL)->d_name) + 1); cookies = malloc(ncookies * sizeof(u_long), M_TEMP, M_WAITOK); *ap->a_cookies = cookies; *ap->a_ncookies = ncookies; } error = gfs_dir_readdir(vp, uiop, eofp, &ncookies, &cookies, NULL, cr, 0); if (error == 0) { /* Subtract unused cookies */ if (ap->a_ncookies) *ap->a_ncookies -= ncookies; } else if (ap->a_ncookies) { free(*ap->a_cookies, M_TEMP); *ap->a_cookies = NULL; *ap->a_ncookies = 0; } return (error); } #ifdef illumos /* * gfs_vop_map: VOP_MAP() entry point * * Convenient routine for handling pseudo-files that wish to allow mmap() calls. * This function only works for readonly files, and uses the read function for * the vnode to fill in the data. The mapped data is immediately faulted in and * filled with the necessary data during this call; there are no getpage() or * putpage() routines. */ /* ARGSUSED */ int gfs_vop_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cred, caller_context_t *ct) { int rv; ssize_t resid = len; /* * Check for bad parameters */ #ifdef _ILP32 if (len > MAXOFF_T) return (ENOMEM); #endif if (vp->v_flag & VNOMAP) return (ENOTSUP); if (off > MAXOFF_T) return (EFBIG); if ((long)off < 0 || (long)(off + len) < 0) return (EINVAL); if (vp->v_type != VREG) return (ENODEV); if ((prot & (PROT_EXEC | PROT_WRITE)) != 0) return (EACCES); /* * Find appropriate address if needed, otherwise clear address range. */ as_rangelock(as); rv = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); if (rv != 0) { as_rangeunlock(as); return (rv); } /* * Create mapping */ rv = as_map(as, *addrp, len, segvn_create, zfod_argsp); as_rangeunlock(as); if (rv != 0) return (rv); /* * Fill with data from read() */ rv = vn_rdwr(UIO_READ, vp, *addrp, len, off, UIO_USERSPACE, 0, (rlim64_t)0, cred, &resid); if (rv == 0 && resid != 0) rv = ENXIO; if (rv != 0) { as_rangelock(as); (void) as_unmap(as, *addrp, len); as_rangeunlock(as); } return (rv); } #endif /* illumos */ /* * gfs_vop_reclaim: VOP_RECLAIM() entry point (solaris' VOP_INACTIVE()) * * Given a vnode that is a GFS file or directory, call gfs_file_inactive() or * gfs_dir_inactive() as necessary, and kmem_free()s associated private data. */ /* ARGSUSED */ int gfs_vop_reclaim(ap) struct vop_reclaim_args /* { struct vnode *a_vp; struct thread *a_td; } */ *ap; { vnode_t *vp = ap->a_vp; gfs_file_t *fp = vp->v_data; if (fp->gfs_type == GFS_DIR) gfs_dir_inactive(vp); else gfs_file_inactive(vp); vnode_destroy_vobject(vp); VI_LOCK(vp); vp->v_data = NULL; VI_UNLOCK(vp); kmem_free(fp, fp->gfs_size); return (0); } Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c =================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c (revision 297512) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c (revision 297513) @@ -1,6771 +1,6800 @@ /* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011-2012 Pawel Jakub Dawidek . * All rights reserved. * Copyright 2013 Martin Matuska . All rights reserved. * Copyright 2014 Xin Li . All rights reserved. * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved. * Copyright 2015 Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2014, Joyent, Inc. All rights reserved. * Copyright (c) 2011, 2015 by Delphix. All rights reserved. * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. * Copyright (c) 2013 Steven Hartland. All rights reserved. * Copyright (c) 2014 Integros [integros.com] */ /* * ZFS ioctls. * * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool. * * There are two ways that we handle ioctls: the legacy way where almost * all of the logic is in the ioctl callback, and the new way where most * of the marshalling is handled in the common entry point, zfsdev_ioctl(). * * Non-legacy ioctls should be registered by calling * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked * from userland by lzc_ioctl(). * * The registration arguments are as follows: * * const char *name * The name of the ioctl. This is used for history logging. If the * ioctl returns successfully (the callback returns 0), and allow_log * is true, then a history log entry will be recorded with the input & * output nvlists. The log entry can be printed with "zpool history -i". * * zfs_ioc_t ioc * The ioctl request number, which userland will pass to ioctl(2). * The ioctl numbers can change from release to release, because * the caller (libzfs) must be matched to the kernel. * * zfs_secpolicy_func_t *secpolicy * This function will be called before the zfs_ioc_func_t, to * determine if this operation is permitted. It should return EPERM * on failure, and 0 on success. Checks include determining if the * dataset is visible in this zone, and if the user has either all * zfs privileges in the zone (SYS_MOUNT), or has been granted permission * to do this operation on this dataset with "zfs allow". * * zfs_ioc_namecheck_t namecheck * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool * name, a dataset name, or nothing. If the name is not well-formed, * the ioctl will fail and the callback will not be called. * Therefore, the callback can assume that the name is well-formed * (e.g. is null-terminated, doesn't have more than one '@' character, * doesn't have invalid characters). * * zfs_ioc_poolcheck_t pool_check * This specifies requirements on the pool state. If the pool does * not meet them (is suspended or is readonly), the ioctl will fail * and the callback will not be called. If any checks are specified * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME. * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED | * POOL_CHECK_READONLY). * * boolean_t smush_outnvlist * If smush_outnvlist is true, then the output is presumed to be a * list of errors, and it will be "smushed" down to fit into the * caller's buffer, by removing some entries and replacing them with a * single "N_MORE_ERRORS" entry indicating how many were removed. See * nvlist_smush() for details. If smush_outnvlist is false, and the * outnvlist does not fit into the userland-provided buffer, then the * ioctl will fail with ENOMEM. * * zfs_ioc_func_t *func * The callback function that will perform the operation. * * The callback should return 0 on success, or an error number on * failure. If the function fails, the userland ioctl will return -1, * and errno will be set to the callback's return value. The callback * will be called with the following arguments: * * const char *name * The name of the pool or dataset to operate on, from * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the * expected type (pool, dataset, or none). * * nvlist_t *innvl * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or * NULL if no input nvlist was provided. Changes to this nvlist are * ignored. If the input nvlist could not be deserialized, the * ioctl will fail and the callback will not be called. * * nvlist_t *outnvl * The output nvlist, initially empty. The callback can fill it in, * and it will be returned to userland by serializing it into * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization * fails (e.g. because the caller didn't supply a large enough * buffer), then the overall ioctl will fail. See the * 'smush_nvlist' argument above for additional behaviors. * * There are two typical uses of the output nvlist: * - To return state, e.g. property values. In this case, * smush_outnvlist should be false. If the buffer was not large * enough, the caller will reallocate a larger buffer and try * the ioctl again. * * - To return multiple errors from an ioctl which makes on-disk * changes. In this case, smush_outnvlist should be true. * Ioctls which make on-disk modifications should generally not * use the outnvl if they succeed, because the caller can not * distinguish between the operation failing, and * deserialization failing. */ #ifdef __FreeBSD__ #include "opt_kstack_pages.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "zfs_namecheck.h" #include "zfs_prop.h" #include "zfs_deleg.h" #include "zfs_comutil.h" #include "zfs_ioctl_compat.h" CTASSERT(sizeof(zfs_cmd_t) < IOCPARM_MAX); static struct cdev *zfsdev; extern void zfs_init(void); extern void zfs_fini(void); uint_t zfs_fsyncer_key; extern uint_t rrw_tsd_key; static uint_t zfs_allow_log_key; extern uint_t zfs_geom_probe_vdev_key; typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *); typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *); typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *); typedef enum { NO_NAME, POOL_NAME, DATASET_NAME } zfs_ioc_namecheck_t; typedef enum { POOL_CHECK_NONE = 1 << 0, POOL_CHECK_SUSPENDED = 1 << 1, POOL_CHECK_READONLY = 1 << 2, } zfs_ioc_poolcheck_t; typedef struct zfs_ioc_vec { zfs_ioc_legacy_func_t *zvec_legacy_func; zfs_ioc_func_t *zvec_func; zfs_secpolicy_func_t *zvec_secpolicy; zfs_ioc_namecheck_t zvec_namecheck; boolean_t zvec_allow_log; zfs_ioc_poolcheck_t zvec_pool_check; boolean_t zvec_smush_outnvlist; const char *zvec_name; } zfs_ioc_vec_t; /* This array is indexed by zfs_userquota_prop_t */ static const char *userquota_perms[] = { ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_PERM_GROUPQUOTA, }; static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc); static int zfs_check_settable(const char *name, nvpair_t *property, cred_t *cr); static int zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errors); static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *, boolean_t *); int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *); static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp); static void zfsdev_close(void *data); static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature); /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */ void __dprintf(const char *file, const char *func, int line, const char *fmt, ...) { const char *newfile; char buf[512]; va_list adx; /* * Get rid of annoying "../common/" prefix to filename. */ newfile = strrchr(file, '/'); if (newfile != NULL) { newfile = newfile + 1; /* Get rid of leading / */ } else { newfile = file; } va_start(adx, fmt); (void) vsnprintf(buf, sizeof (buf), fmt, adx); va_end(adx); /* * To get this data, use the zfs-dprintf probe as so: * dtrace -q -n 'zfs-dprintf \ * /stringof(arg0) == "dbuf.c"/ \ * {printf("%s: %s", stringof(arg1), stringof(arg3))}' * arg0 = file name * arg1 = function name * arg2 = line number * arg3 = message */ DTRACE_PROBE4(zfs__dprintf, char *, newfile, char *, func, int, line, char *, buf); } static void history_str_free(char *buf) { kmem_free(buf, HIS_MAX_RECORD_LEN); } static char * history_str_get(zfs_cmd_t *zc) { char *buf; if (zc->zc_history == 0) return (NULL); buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP); if (copyinstr((void *)(uintptr_t)zc->zc_history, buf, HIS_MAX_RECORD_LEN, NULL) != 0) { history_str_free(buf); return (NULL); } buf[HIS_MAX_RECORD_LEN -1] = '\0'; return (buf); } /* * Check to see if the named dataset is currently defined as bootable */ static boolean_t zfs_is_bootfs(const char *name) { objset_t *os; if (dmu_objset_hold(name, FTAG, &os) == 0) { boolean_t ret; ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os))); dmu_objset_rele(os, FTAG); return (ret); } return (B_FALSE); } /* * Return non-zero if the spa version is less than requested version. */ static int zfs_earlier_version(const char *name, int version) { spa_t *spa; if (spa_open(name, &spa, FTAG) == 0) { if (spa_version(spa) < version) { spa_close(spa, FTAG); return (1); } spa_close(spa, FTAG); } return (0); } /* * Return TRUE if the ZPL version is less than requested version. */ static boolean_t zpl_earlier_version(const char *name, int version) { objset_t *os; boolean_t rc = B_TRUE; if (dmu_objset_hold(name, FTAG, &os) == 0) { uint64_t zplversion; if (dmu_objset_type(os) != DMU_OST_ZFS) { dmu_objset_rele(os, FTAG); return (B_TRUE); } /* XXX reading from non-owned objset */ if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0) rc = zplversion < version; dmu_objset_rele(os, FTAG); } return (rc); } static void zfs_log_history(zfs_cmd_t *zc) { spa_t *spa; char *buf; if ((buf = history_str_get(zc)) == NULL) return; if (spa_open(zc->zc_name, &spa, FTAG) == 0) { if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY) (void) spa_history_log(spa, buf); spa_close(spa, FTAG); } history_str_free(buf); } /* * Policy for top-level read operations (list pools). Requires no privileges, * and can be used in the local zone, as there is no associated dataset. */ /* ARGSUSED */ static int zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (0); } /* * Policy for dataset read operations (list children, get statistics). Requires * no privileges, but must be visible in the local zone. */ /* ARGSUSED */ static int zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { if (INGLOBALZONE(curthread) || zone_dataset_visible(zc->zc_name, NULL)) return (0); return (SET_ERROR(ENOENT)); } static int zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr) { int writable = 1; /* * The dataset must be visible by this zone -- check this first * so they don't see EPERM on something they shouldn't know about. */ if (!INGLOBALZONE(curthread) && !zone_dataset_visible(dataset, &writable)) return (SET_ERROR(ENOENT)); if (INGLOBALZONE(curthread)) { /* * If the fs is zoned, only root can access it from the * global zone. */ if (secpolicy_zfs(cr) && zoned) return (SET_ERROR(EPERM)); } else { /* * If we are in a local zone, the 'zoned' property must be set. */ if (!zoned) return (SET_ERROR(EPERM)); /* must be writable by this zone */ if (!writable) return (SET_ERROR(EPERM)); } return (0); } static int zfs_dozonecheck(const char *dataset, cred_t *cr) { uint64_t zoned; if (dsl_prop_get_integer(dataset, "jailed", &zoned, NULL)) return (SET_ERROR(ENOENT)); return (zfs_dozonecheck_impl(dataset, zoned, cr)); } static int zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr) { uint64_t zoned; if (dsl_prop_get_int_ds(ds, "jailed", &zoned)) return (SET_ERROR(ENOENT)); return (zfs_dozonecheck_impl(dataset, zoned, cr)); } static int zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds, const char *perm, cred_t *cr) { int error; error = zfs_dozonecheck_ds(name, ds, cr); if (error == 0) { error = secpolicy_zfs(cr); if (error != 0) error = dsl_deleg_access_impl(ds, perm, cr); } return (error); } static int zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr) { int error; dsl_dataset_t *ds; dsl_pool_t *dp; error = dsl_pool_hold(name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, name, FTAG, &ds); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr); dsl_dataset_rele(ds, FTAG); dsl_pool_rele(dp, FTAG); return (error); } #ifdef SECLABEL /* * Policy for setting the security label property. * * Returns 0 for success, non-zero for access and other errors. */ static int zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr) { char ds_hexsl[MAXNAMELEN]; bslabel_t ds_sl, new_sl; boolean_t new_default = FALSE; uint64_t zoned; int needed_priv = -1; int error; /* First get the existing dataset label. */ error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL), 1, sizeof (ds_hexsl), &ds_hexsl, NULL); if (error != 0) return (SET_ERROR(EPERM)); if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) new_default = TRUE; /* The label must be translatable */ if (!new_default && (hexstr_to_label(strval, &new_sl) != 0)) return (SET_ERROR(EINVAL)); /* * In a non-global zone, disallow attempts to set a label that * doesn't match that of the zone; otherwise no other checks * are needed. */ if (!INGLOBALZONE(curproc)) { if (new_default || !blequal(&new_sl, CR_SL(CRED()))) return (SET_ERROR(EPERM)); return (0); } /* * For global-zone datasets (i.e., those whose zoned property is * "off", verify that the specified new label is valid for the * global zone. */ if (dsl_prop_get_integer(name, zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL)) return (SET_ERROR(EPERM)); if (!zoned) { if (zfs_check_global_label(name, strval) != 0) return (SET_ERROR(EPERM)); } /* * If the existing dataset label is nondefault, check if the * dataset is mounted (label cannot be changed while mounted). * Get the zfsvfs; if there isn't one, then the dataset isn't * mounted (or isn't a dataset, doesn't exist, ...). */ if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) { objset_t *os; static char *setsl_tag = "setsl_tag"; /* * Try to own the dataset; abort if there is any error, * (e.g., already mounted, in use, or other error). */ error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE, setsl_tag, &os); if (error != 0) return (SET_ERROR(EPERM)); dmu_objset_disown(os, setsl_tag); if (new_default) { needed_priv = PRIV_FILE_DOWNGRADE_SL; goto out_check; } if (hexstr_to_label(strval, &new_sl) != 0) return (SET_ERROR(EPERM)); if (blstrictdom(&ds_sl, &new_sl)) needed_priv = PRIV_FILE_DOWNGRADE_SL; else if (blstrictdom(&new_sl, &ds_sl)) needed_priv = PRIV_FILE_UPGRADE_SL; } else { /* dataset currently has a default label */ if (!new_default) needed_priv = PRIV_FILE_UPGRADE_SL; } out_check: if (needed_priv != -1) return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL)); return (0); } #endif /* SECLABEL */ static int zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval, cred_t *cr) { char *strval; /* * Check permissions for special properties. */ switch (prop) { case ZFS_PROP_ZONED: /* * Disallow setting of 'zoned' from within a local zone. */ if (!INGLOBALZONE(curthread)) return (SET_ERROR(EPERM)); break; case ZFS_PROP_QUOTA: case ZFS_PROP_FILESYSTEM_LIMIT: case ZFS_PROP_SNAPSHOT_LIMIT: if (!INGLOBALZONE(curthread)) { uint64_t zoned; char setpoint[MAXNAMELEN]; /* * Unprivileged users are allowed to modify the * limit on things *under* (ie. contained by) * the thing they own. */ if (dsl_prop_get_integer(dsname, "jailed", &zoned, setpoint)) return (SET_ERROR(EPERM)); if (!zoned || strlen(dsname) <= strlen(setpoint)) return (SET_ERROR(EPERM)); } break; case ZFS_PROP_MLSLABEL: #ifdef SECLABEL if (!is_system_labeled()) return (SET_ERROR(EPERM)); if (nvpair_value_string(propval, &strval) == 0) { int err; err = zfs_set_slabel_policy(dsname, strval, CRED()); if (err != 0) return (err); } #else return (EOPNOTSUPP); #endif break; } return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr)); } /* ARGSUSED */ static int zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int error; error = zfs_dozonecheck(zc->zc_name, cr); if (error != 0) return (error); /* * permission to set permissions will be evaluated later in * dsl_deleg_can_allow() */ return (0); } /* ARGSUSED */ static int zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_ROLLBACK, cr)); } /* ARGSUSED */ static int zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { dsl_pool_t *dp; dsl_dataset_t *ds; char *cp; int error; /* * Generate the current snapshot name from the given objsetid, then * use that name for the secpolicy/zone checks. */ cp = strchr(zc->zc_name, '@'); if (cp == NULL) return (SET_ERROR(EINVAL)); error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } dsl_dataset_name(ds, zc->zc_name); error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds, ZFS_DELEG_PERM_SEND, cr); dsl_dataset_rele(ds, FTAG); dsl_pool_rele(dp, FTAG); return (error); } /* ARGSUSED */ static int zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_SEND, cr)); } /* ARGSUSED */ static int zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { vnode_t *vp; int error; if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, NO_FOLLOW, NULL, &vp)) != 0) return (error); /* Now make sure mntpnt and dataset are ZFS */ if (strcmp(vp->v_vfsp->mnt_stat.f_fstypename, "zfs") != 0 || (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), zc->zc_name) != 0)) { VN_RELE(vp); return (SET_ERROR(EPERM)); } VN_RELE(vp); return (dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_SHARE, cr)); } int zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { if (!INGLOBALZONE(curthread)) return (SET_ERROR(EPERM)); if (secpolicy_nfs(cr) == 0) { return (0); } else { return (zfs_secpolicy_deleg_share(zc, innvl, cr)); } } int zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { if (!INGLOBALZONE(curthread)) return (SET_ERROR(EPERM)); if (secpolicy_smb(cr) == 0) { return (0); } else { return (zfs_secpolicy_deleg_share(zc, innvl, cr)); } } static int zfs_get_parent(const char *datasetname, char *parent, int parentsize) { char *cp; /* * Remove the @bla or /bla from the end of the name to get the parent. */ (void) strncpy(parent, datasetname, parentsize); cp = strrchr(parent, '@'); if (cp != NULL) { cp[0] = '\0'; } else { cp = strrchr(parent, '/'); if (cp == NULL) return (SET_ERROR(ENOENT)); cp[0] = '\0'; } return (0); } int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) { int error; if ((error = zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_MOUNT, cr)) != 0) return (error); return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr)); } /* ARGSUSED */ static int zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (zfs_secpolicy_destroy_perms(zc->zc_name, cr)); } /* * Destroying snapshots with delegated permissions requires * descendant mount and destroy permissions. */ /* ARGSUSED */ static int zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { nvlist_t *snaps; nvpair_t *pair, *nextpair; int error = 0; if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) return (SET_ERROR(EINVAL)); for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; pair = nextpair) { nextpair = nvlist_next_nvpair(snaps, pair); error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr); if (error == ENOENT) { /* * Ignore any snapshots that don't exist (we consider * them "already destroyed"). Remove the name from the * nvl here in case the snapshot is created between * now and when we try to destroy it (in which case * we don't want to destroy it since we haven't * checked for permission). */ fnvlist_remove_nvpair(snaps, pair); error = 0; } if (error != 0) break; } return (error); } int zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) { char parentname[MAXNAMELEN]; int error; if ((error = zfs_secpolicy_write_perms(from, ZFS_DELEG_PERM_RENAME, cr)) != 0) return (error); if ((error = zfs_secpolicy_write_perms(from, ZFS_DELEG_PERM_MOUNT, cr)) != 0) return (error); if ((error = zfs_get_parent(to, parentname, sizeof (parentname))) != 0) return (error); if ((error = zfs_secpolicy_write_perms(parentname, ZFS_DELEG_PERM_CREATE, cr)) != 0) return (error); if ((error = zfs_secpolicy_write_perms(parentname, ZFS_DELEG_PERM_MOUNT, cr)) != 0) return (error); return (error); } /* ARGSUSED */ static int zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { char *at = NULL; int error; if ((zc->zc_cookie & 1) != 0) { /* * This is recursive rename, so the starting snapshot might * not exist. Check file system or volume permission instead. */ at = strchr(zc->zc_name, '@'); if (at == NULL) return (EINVAL); *at = '\0'; } error = zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr); if (at != NULL) *at = '@'; return (error); } /* ARGSUSED */ static int zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { dsl_pool_t *dp; dsl_dataset_t *clone; int error; error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_PROMOTE, cr); if (error != 0) return (error); error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone); if (error == 0) { char parentname[MAXNAMELEN]; dsl_dataset_t *origin = NULL; dsl_dir_t *dd; dd = clone->ds_dir; error = dsl_dataset_hold_obj(dd->dd_pool, dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin); if (error != 0) { dsl_dataset_rele(clone, FTAG); dsl_pool_rele(dp, FTAG); return (error); } error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone, ZFS_DELEG_PERM_MOUNT, cr); dsl_dataset_name(origin, parentname); if (error == 0) { error = zfs_secpolicy_write_perms_ds(parentname, origin, ZFS_DELEG_PERM_PROMOTE, cr); } dsl_dataset_rele(clone, FTAG); dsl_dataset_rele(origin, FTAG); } dsl_pool_rele(dp, FTAG); return (error); } /* ARGSUSED */ static int zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int error; if ((error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_RECEIVE, cr)) != 0) return (error); if ((error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr)) != 0) return (error); return (zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_CREATE, cr)); } int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) { return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_SNAPSHOT, cr)); } /* * Check for permission to create each snapshot in the nvlist. */ /* ARGSUSED */ static int zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { nvlist_t *snaps; int error; nvpair_t *pair; if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) return (SET_ERROR(EINVAL)); for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; pair = nvlist_next_nvpair(snaps, pair)) { char *name = nvpair_name(pair); char *atp = strchr(name, '@'); if (atp == NULL) { error = SET_ERROR(EINVAL); break; } *atp = '\0'; error = zfs_secpolicy_snapshot_perms(name, cr); *atp = '@'; if (error != 0) break; } return (error); } /* * Check for permission to create each snapshot in the nvlist. */ /* ARGSUSED */ static int zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int error = 0; for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { char *name = nvpair_name(pair); char *hashp = strchr(name, '#'); if (hashp == NULL) { error = SET_ERROR(EINVAL); break; } *hashp = '\0'; error = zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_BOOKMARK, cr); *hashp = '#'; if (error != 0) break; } return (error); } /* ARGSUSED */ static int zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { nvpair_t *pair, *nextpair; int error = 0; for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; pair = nextpair) { char *name = nvpair_name(pair); char *hashp = strchr(name, '#'); nextpair = nvlist_next_nvpair(innvl, pair); if (hashp == NULL) { error = SET_ERROR(EINVAL); break; } *hashp = '\0'; error = zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr); *hashp = '#'; if (error == ENOENT) { /* * Ignore any filesystems that don't exist (we consider * their bookmarks "already destroyed"). Remove * the name from the nvl here in case the filesystem * is created between now and when we try to destroy * the bookmark (in which case we don't want to * destroy it since we haven't checked for permission). */ fnvlist_remove_nvpair(innvl, pair); error = 0; } if (error != 0) break; } return (error); } /* ARGSUSED */ static int zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { /* * Even root must have a proper TSD so that we know what pool * to log to. */ if (tsd_get(zfs_allow_log_key) == NULL) return (SET_ERROR(EPERM)); return (0); } static int zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { char parentname[MAXNAMELEN]; int error; char *origin; if ((error = zfs_get_parent(zc->zc_name, parentname, sizeof (parentname))) != 0) return (error); if (nvlist_lookup_string(innvl, "origin", &origin) == 0 && (error = zfs_secpolicy_write_perms(origin, ZFS_DELEG_PERM_CLONE, cr)) != 0) return (error); if ((error = zfs_secpolicy_write_perms(parentname, ZFS_DELEG_PERM_CREATE, cr)) != 0) return (error); return (zfs_secpolicy_write_perms(parentname, ZFS_DELEG_PERM_MOUNT, cr)); } /* * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires * SYS_CONFIG privilege, which is not available in a local zone. */ /* ARGSUSED */ static int zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { if (secpolicy_sys_config(cr, B_FALSE) != 0) return (SET_ERROR(EPERM)); return (0); } /* * Policy for object to name lookups. */ /* ARGSUSED */ static int zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int error; if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0) return (0); error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr); return (error); } /* * Policy for fault injection. Requires all privileges. */ /* ARGSUSED */ static int zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (secpolicy_zinject(cr)); } /* ARGSUSED */ static int zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { zfs_prop_t prop = zfs_name_to_prop(zc->zc_value); if (prop == ZPROP_INVAL) { if (!zfs_prop_user(zc->zc_value)) return (SET_ERROR(EINVAL)); return (zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_USERPROP, cr)); } else { return (zfs_secpolicy_setprop(zc->zc_name, prop, NULL, cr)); } } static int zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int err = zfs_secpolicy_read(zc, innvl, cr); if (err) return (err); if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) return (SET_ERROR(EINVAL)); if (zc->zc_value[0] == 0) { /* * They are asking about a posix uid/gid. If it's * themself, allow it. */ if (zc->zc_objset_type == ZFS_PROP_USERUSED || zc->zc_objset_type == ZFS_PROP_USERQUOTA) { if (zc->zc_guid == crgetuid(cr)) return (0); } else { if (groupmember(zc->zc_guid, cr)) return (0); } } return (zfs_secpolicy_write_perms(zc->zc_name, userquota_perms[zc->zc_objset_type], cr)); } static int zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { int err = zfs_secpolicy_read(zc, innvl, cr); if (err) return (err); if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) return (SET_ERROR(EINVAL)); return (zfs_secpolicy_write_perms(zc->zc_name, userquota_perms[zc->zc_objset_type], cr)); } /* ARGSUSED */ static int zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION, NULL, cr)); } /* ARGSUSED */ static int zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { nvpair_t *pair; nvlist_t *holds; int error; error = nvlist_lookup_nvlist(innvl, "holds", &holds); if (error != 0) return (SET_ERROR(EINVAL)); for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; pair = nvlist_next_nvpair(holds, pair)) { char fsname[MAXNAMELEN]; error = dmu_fsname(nvpair_name(pair), fsname); if (error != 0) return (error); error = zfs_secpolicy_write_perms(fsname, ZFS_DELEG_PERM_HOLD, cr); if (error != 0) return (error); } return (0); } /* ARGSUSED */ static int zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { nvpair_t *pair; int error; for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { char fsname[MAXNAMELEN]; error = dmu_fsname(nvpair_name(pair), fsname); if (error != 0) return (error); error = zfs_secpolicy_write_perms(fsname, ZFS_DELEG_PERM_RELEASE, cr); if (error != 0) return (error); } return (0); } /* * Policy for allowing temporary snapshots to be taken or released */ static int zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr) { /* * A temporary snapshot is the same as a snapshot, * hold, destroy and release all rolled into one. * Delegated diff alone is sufficient that we allow this. */ int error; if ((error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr)) == 0) return (0); error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr); if (error == 0) error = zfs_secpolicy_hold(zc, innvl, cr); if (error == 0) error = zfs_secpolicy_release(zc, innvl, cr); if (error == 0) error = zfs_secpolicy_destroy(zc, innvl, cr); return (error); } /* * Returns the nvlist as specified by the user in the zfs_cmd_t. */ static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp) { char *packed; int error; nvlist_t *list = NULL; /* * Read in and unpack the user-supplied nvlist. */ if (size == 0) return (SET_ERROR(EINVAL)); packed = kmem_alloc(size, KM_SLEEP); if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size, iflag)) != 0) { kmem_free(packed, size); return (SET_ERROR(EFAULT)); } if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) { kmem_free(packed, size); return (error); } kmem_free(packed, size); *nvp = list; return (0); } /* * Reduce the size of this nvlist until it can be serialized in 'max' bytes. * Entries will be removed from the end of the nvlist, and one int32 entry * named "N_MORE_ERRORS" will be added indicating how many entries were * removed. */ static int nvlist_smush(nvlist_t *errors, size_t max) { size_t size; size = fnvlist_size(errors); if (size > max) { nvpair_t *more_errors; int n = 0; if (max < 1024) return (SET_ERROR(ENOMEM)); fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0); more_errors = nvlist_prev_nvpair(errors, NULL); do { nvpair_t *pair = nvlist_prev_nvpair(errors, more_errors); fnvlist_remove_nvpair(errors, pair); n++; size = fnvlist_size(errors); } while (size > max); fnvlist_remove_nvpair(errors, more_errors); fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n); ASSERT3U(fnvlist_size(errors), <=, max); } return (0); } static int put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl) { char *packed = NULL; int error = 0; size_t size; size = fnvlist_size(nvl); if (size > zc->zc_nvlist_dst_size) { /* * Solaris returns ENOMEM here, because even if an error is * returned from an ioctl(2), new zc_nvlist_dst_size will be * passed to the userland. This is not the case for FreeBSD. * We need to return 0, so the kernel will copy the * zc_nvlist_dst_size back and the userland can discover that a * bigger buffer is needed. */ error = 0; } else { packed = fnvlist_pack(nvl, &size); if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst, size, zc->zc_iflags) != 0) error = SET_ERROR(EFAULT); fnvlist_pack_free(packed, size); } zc->zc_nvlist_dst_size = size; zc->zc_nvlist_dst_filled = B_TRUE; return (error); } static int getzfsvfs(const char *dsname, zfsvfs_t **zfvp) { objset_t *os; int error; error = dmu_objset_hold(dsname, FTAG, &os); if (error != 0) return (error); if (dmu_objset_type(os) != DMU_OST_ZFS) { dmu_objset_rele(os, FTAG); return (SET_ERROR(EINVAL)); } mutex_enter(&os->os_user_ptr_lock); *zfvp = dmu_objset_get_user(os); if (*zfvp) { +#ifdef illumos VFS_HOLD((*zfvp)->z_vfs); +#else + if (vfs_busy((*zfvp)->z_vfs, 0) != 0) { + *zfvp = NULL; + error = SET_ERROR(ESRCH); + } +#endif } else { error = SET_ERROR(ESRCH); } mutex_exit(&os->os_user_ptr_lock); dmu_objset_rele(os, FTAG); return (error); } /* * Find a zfsvfs_t for a mounted filesystem, or create our own, in which * case its z_vfs will be NULL, and it will be opened as the owner. * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER, * which prevents all vnode ops from running. */ static int zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer) { int error = 0; if (getzfsvfs(name, zfvp) != 0) error = zfsvfs_create(name, zfvp); if (error == 0) { rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER : RW_READER, tag); if ((*zfvp)->z_unmounted) { /* * XXX we could probably try again, since the unmounting * thread should be just about to disassociate the * objset from the zfsvfs. */ rrm_exit(&(*zfvp)->z_teardown_lock, tag); return (SET_ERROR(EBUSY)); } } return (error); } static void zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag) { rrm_exit(&zfsvfs->z_teardown_lock, tag); if (zfsvfs->z_vfs) { +#ifdef illumos VFS_RELE(zfsvfs->z_vfs); +#else + vfs_unbusy(zfsvfs->z_vfs); +#endif } else { dmu_objset_disown(zfsvfs->z_os, zfsvfs); zfsvfs_free(zfsvfs); } } static int zfs_ioc_pool_create(zfs_cmd_t *zc) { int error; nvlist_t *config, *props = NULL; nvlist_t *rootprops = NULL; nvlist_t *zplprops = NULL; if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &config)) return (error); if (zc->zc_nvlist_src_size != 0 && (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &props))) { nvlist_free(config); return (error); } if (props) { nvlist_t *nvl = NULL; uint64_t version = SPA_VERSION; (void) nvlist_lookup_uint64(props, zpool_prop_to_name(ZPOOL_PROP_VERSION), &version); if (!SPA_VERSION_IS_SUPPORTED(version)) { error = SET_ERROR(EINVAL); goto pool_props_bad; } (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl); if (nvl) { error = nvlist_dup(nvl, &rootprops, KM_SLEEP); if (error != 0) { nvlist_free(config); nvlist_free(props); return (error); } (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS); } VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); error = zfs_fill_zplprops_root(version, rootprops, zplprops, NULL); if (error != 0) goto pool_props_bad; } error = spa_create(zc->zc_name, config, props, zplprops); /* * Set the remaining root properties */ if (!error && (error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL, rootprops, NULL)) != 0) (void) spa_destroy(zc->zc_name); pool_props_bad: nvlist_free(rootprops); nvlist_free(zplprops); nvlist_free(config); nvlist_free(props); return (error); } static int zfs_ioc_pool_destroy(zfs_cmd_t *zc) { int error; zfs_log_history(zc); error = spa_destroy(zc->zc_name); if (error == 0) zvol_remove_minors(zc->zc_name); return (error); } static int zfs_ioc_pool_import(zfs_cmd_t *zc) { nvlist_t *config, *props = NULL; uint64_t guid; int error; if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &config)) != 0) return (error); if (zc->zc_nvlist_src_size != 0 && (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &props))) { nvlist_free(config); return (error); } if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || guid != zc->zc_guid) error = SET_ERROR(EINVAL); else error = spa_import(zc->zc_name, config, props, zc->zc_cookie); if (zc->zc_nvlist_dst != 0) { int err; if ((err = put_nvlist(zc, config)) != 0) error = err; } nvlist_free(config); nvlist_free(props); return (error); } static int zfs_ioc_pool_export(zfs_cmd_t *zc) { int error; boolean_t force = (boolean_t)zc->zc_cookie; boolean_t hardforce = (boolean_t)zc->zc_guid; zfs_log_history(zc); error = spa_export(zc->zc_name, NULL, force, hardforce); if (error == 0) zvol_remove_minors(zc->zc_name); return (error); } static int zfs_ioc_pool_configs(zfs_cmd_t *zc) { nvlist_t *configs; int error; if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL) return (SET_ERROR(EEXIST)); error = put_nvlist(zc, configs); nvlist_free(configs); return (error); } /* * inputs: * zc_name name of the pool * * outputs: * zc_cookie real errno * zc_nvlist_dst config nvlist * zc_nvlist_dst_size size of config nvlist */ static int zfs_ioc_pool_stats(zfs_cmd_t *zc) { nvlist_t *config; int error; int ret = 0; error = spa_get_stats(zc->zc_name, &config, zc->zc_value, sizeof (zc->zc_value)); if (config != NULL) { ret = put_nvlist(zc, config); nvlist_free(config); /* * The config may be present even if 'error' is non-zero. * In this case we return success, and preserve the real errno * in 'zc_cookie'. */ zc->zc_cookie = error; } else { ret = error; } return (ret); } /* * Try to import the given pool, returning pool stats as appropriate so that * user land knows which devices are available and overall pool health. */ static int zfs_ioc_pool_tryimport(zfs_cmd_t *zc) { nvlist_t *tryconfig, *config; int error; if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &tryconfig)) != 0) return (error); config = spa_tryimport(tryconfig); nvlist_free(tryconfig); if (config == NULL) return (SET_ERROR(EINVAL)); error = put_nvlist(zc, config); nvlist_free(config); return (error); } /* * inputs: * zc_name name of the pool * zc_cookie scan func (pool_scan_func_t) */ static int zfs_ioc_pool_scan(zfs_cmd_t *zc) { spa_t *spa; int error; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); if (zc->zc_cookie == POOL_SCAN_NONE) error = spa_scan_stop(spa); else error = spa_scan(spa, zc->zc_cookie); spa_close(spa, FTAG); return (error); } static int zfs_ioc_pool_freeze(zfs_cmd_t *zc) { spa_t *spa; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error == 0) { spa_freeze(spa); spa_close(spa, FTAG); } return (error); } static int zfs_ioc_pool_upgrade(zfs_cmd_t *zc) { spa_t *spa; int error; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); if (zc->zc_cookie < spa_version(spa) || !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) { spa_close(spa, FTAG); return (SET_ERROR(EINVAL)); } spa_upgrade(spa, zc->zc_cookie); spa_close(spa, FTAG); return (error); } static int zfs_ioc_pool_get_history(zfs_cmd_t *zc) { spa_t *spa; char *hist_buf; uint64_t size; int error; if ((size = zc->zc_history_len) == 0) return (SET_ERROR(EINVAL)); if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { spa_close(spa, FTAG); return (SET_ERROR(ENOTSUP)); } hist_buf = kmem_alloc(size, KM_SLEEP); if ((error = spa_history_get(spa, &zc->zc_history_offset, &zc->zc_history_len, hist_buf)) == 0) { error = ddi_copyout(hist_buf, (void *)(uintptr_t)zc->zc_history, zc->zc_history_len, zc->zc_iflags); } spa_close(spa, FTAG); kmem_free(hist_buf, size); return (error); } static int zfs_ioc_pool_reguid(zfs_cmd_t *zc) { spa_t *spa; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error == 0) { error = spa_change_guid(spa); spa_close(spa, FTAG); } return (error); } static int zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc) { return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value)); } /* * inputs: * zc_name name of filesystem * zc_obj object to find * * outputs: * zc_value name of object */ static int zfs_ioc_obj_to_path(zfs_cmd_t *zc) { objset_t *os; int error; /* XXX reading from objset not owned */ if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) return (error); if (dmu_objset_type(os) != DMU_OST_ZFS) { dmu_objset_rele(os, FTAG); return (SET_ERROR(EINVAL)); } error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value, sizeof (zc->zc_value)); dmu_objset_rele(os, FTAG); return (error); } /* * inputs: * zc_name name of filesystem * zc_obj object to find * * outputs: * zc_stat stats on object * zc_value path to object */ static int zfs_ioc_obj_to_stats(zfs_cmd_t *zc) { objset_t *os; int error; /* XXX reading from objset not owned */ if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0) return (error); if (dmu_objset_type(os) != DMU_OST_ZFS) { dmu_objset_rele(os, FTAG); return (SET_ERROR(EINVAL)); } error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value, sizeof (zc->zc_value)); dmu_objset_rele(os, FTAG); return (error); } static int zfs_ioc_vdev_add(zfs_cmd_t *zc) { spa_t *spa; int error; nvlist_t *config, **l2cache, **spares; uint_t nl2cache = 0, nspares = 0; error = spa_open(zc->zc_name, &spa, FTAG); if (error != 0) return (error); error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &config); (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache); (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES, &spares, &nspares); #ifdef illumos /* * A root pool with concatenated devices is not supported. * Thus, can not add a device to a root pool. * * Intent log device can not be added to a rootpool because * during mountroot, zil is replayed, a seperated log device * can not be accessed during the mountroot time. * * l2cache and spare devices are ok to be added to a rootpool. */ if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) { nvlist_free(config); spa_close(spa, FTAG); return (SET_ERROR(EDOM)); } #endif /* illumos */ if (error == 0) { error = spa_vdev_add(spa, config); nvlist_free(config); } spa_close(spa, FTAG); return (error); } /* * inputs: * zc_name name of the pool * zc_nvlist_conf nvlist of devices to remove * zc_cookie to stop the remove? */ static int zfs_ioc_vdev_remove(zfs_cmd_t *zc) { spa_t *spa; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error != 0) return (error); error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE); spa_close(spa, FTAG); return (error); } static int zfs_ioc_vdev_set_state(zfs_cmd_t *zc) { spa_t *spa; int error; vdev_state_t newstate = VDEV_STATE_UNKNOWN; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); switch (zc->zc_cookie) { case VDEV_STATE_ONLINE: error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate); break; case VDEV_STATE_OFFLINE: error = vdev_offline(spa, zc->zc_guid, zc->zc_obj); break; case VDEV_STATE_FAULTED: if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && zc->zc_obj != VDEV_AUX_EXTERNAL) zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; error = vdev_fault(spa, zc->zc_guid, zc->zc_obj); break; case VDEV_STATE_DEGRADED: if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED && zc->zc_obj != VDEV_AUX_EXTERNAL) zc->zc_obj = VDEV_AUX_ERR_EXCEEDED; error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj); break; default: error = SET_ERROR(EINVAL); } zc->zc_cookie = newstate; spa_close(spa, FTAG); return (error); } static int zfs_ioc_vdev_attach(zfs_cmd_t *zc) { spa_t *spa; int replacing = zc->zc_cookie; nvlist_t *config; int error; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &config)) == 0) { error = spa_vdev_attach(spa, zc->zc_guid, config, replacing); nvlist_free(config); } spa_close(spa, FTAG); return (error); } static int zfs_ioc_vdev_detach(zfs_cmd_t *zc) { spa_t *spa; int error; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE); spa_close(spa, FTAG); return (error); } static int zfs_ioc_vdev_split(zfs_cmd_t *zc) { spa_t *spa; nvlist_t *config, *props = NULL; int error; boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT); if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size, zc->zc_iflags, &config)) { spa_close(spa, FTAG); return (error); } if (zc->zc_nvlist_src_size != 0 && (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &props))) { spa_close(spa, FTAG); nvlist_free(config); return (error); } error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp); spa_close(spa, FTAG); nvlist_free(config); nvlist_free(props); return (error); } static int zfs_ioc_vdev_setpath(zfs_cmd_t *zc) { spa_t *spa; char *path = zc->zc_value; uint64_t guid = zc->zc_guid; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error != 0) return (error); error = spa_vdev_setpath(spa, guid, path); spa_close(spa, FTAG); return (error); } static int zfs_ioc_vdev_setfru(zfs_cmd_t *zc) { spa_t *spa; char *fru = zc->zc_value; uint64_t guid = zc->zc_guid; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error != 0) return (error); error = spa_vdev_setfru(spa, guid, fru); spa_close(spa, FTAG); return (error); } static int zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os) { int error = 0; nvlist_t *nv; dmu_objset_fast_stat(os, &zc->zc_objset_stats); if (zc->zc_nvlist_dst != 0 && (error = dsl_prop_get_all(os, &nv)) == 0) { dmu_objset_stats(os, nv); /* * NB: zvol_get_stats() will read the objset contents, * which we aren't supposed to do with a * DS_MODE_USER hold, because it could be * inconsistent. So this is a bit of a workaround... * XXX reading with out owning */ if (!zc->zc_objset_stats.dds_inconsistent && dmu_objset_type(os) == DMU_OST_ZVOL) { error = zvol_get_stats(os, nv); if (error == EIO) return (error); VERIFY0(error); } error = put_nvlist(zc, nv); nvlist_free(nv); } return (error); } /* * inputs: * zc_name name of filesystem * zc_nvlist_dst_size size of buffer for property nvlist * * outputs: * zc_objset_stats stats * zc_nvlist_dst property nvlist * zc_nvlist_dst_size size of property nvlist */ static int zfs_ioc_objset_stats(zfs_cmd_t *zc) { objset_t *os; int error; error = dmu_objset_hold(zc->zc_name, FTAG, &os); if (error == 0) { error = zfs_ioc_objset_stats_impl(zc, os); dmu_objset_rele(os, FTAG); } if (error == ENOMEM) error = 0; return (error); } /* * inputs: * zc_name name of filesystem * zc_nvlist_dst_size size of buffer for property nvlist * * outputs: * zc_nvlist_dst received property nvlist * zc_nvlist_dst_size size of received property nvlist * * Gets received properties (distinct from local properties on or after * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from * local property values. */ static int zfs_ioc_objset_recvd_props(zfs_cmd_t *zc) { int error = 0; nvlist_t *nv; /* * Without this check, we would return local property values if the * caller has not already received properties on or after * SPA_VERSION_RECVD_PROPS. */ if (!dsl_prop_get_hasrecvd(zc->zc_name)) return (SET_ERROR(ENOTSUP)); if (zc->zc_nvlist_dst != 0 && (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) { error = put_nvlist(zc, nv); nvlist_free(nv); } return (error); } static int nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop) { uint64_t value; int error; /* * zfs_get_zplprop() will either find a value or give us * the default value (if there is one). */ if ((error = zfs_get_zplprop(os, prop, &value)) != 0) return (error); VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0); return (0); } /* * inputs: * zc_name name of filesystem * zc_nvlist_dst_size size of buffer for zpl property nvlist * * outputs: * zc_nvlist_dst zpl property nvlist * zc_nvlist_dst_size size of zpl property nvlist */ static int zfs_ioc_objset_zplprops(zfs_cmd_t *zc) { objset_t *os; int err; /* XXX reading without owning */ if (err = dmu_objset_hold(zc->zc_name, FTAG, &os)) return (err); dmu_objset_fast_stat(os, &zc->zc_objset_stats); /* * NB: nvl_add_zplprop() will read the objset contents, * which we aren't supposed to do with a DS_MODE_USER * hold, because it could be inconsistent. */ if (zc->zc_nvlist_dst != 0 && !zc->zc_objset_stats.dds_inconsistent && dmu_objset_type(os) == DMU_OST_ZFS) { nvlist_t *nv; VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 && (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 && (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 && (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0) err = put_nvlist(zc, nv); nvlist_free(nv); } else { err = SET_ERROR(ENOENT); } dmu_objset_rele(os, FTAG); return (err); } boolean_t dataset_name_hidden(const char *name) { /* * Skip over datasets that are not visible in this zone, * internal datasets (which have a $ in their name), and * temporary datasets (which have a % in their name). */ if (strchr(name, '$') != NULL) return (B_TRUE); if (strchr(name, '%') != NULL) return (B_TRUE); if (!INGLOBALZONE(curthread) && !zone_dataset_visible(name, NULL)) return (B_TRUE); return (B_FALSE); } /* * inputs: * zc_name name of filesystem * zc_cookie zap cursor * zc_nvlist_dst_size size of buffer for property nvlist * * outputs: * zc_name name of next filesystem * zc_cookie zap cursor * zc_objset_stats stats * zc_nvlist_dst property nvlist * zc_nvlist_dst_size size of property nvlist */ static int zfs_ioc_dataset_list_next(zfs_cmd_t *zc) { objset_t *os; int error; char *p; size_t orig_len = strlen(zc->zc_name); top: if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) { if (error == ENOENT) error = SET_ERROR(ESRCH); return (error); } p = strrchr(zc->zc_name, '/'); if (p == NULL || p[1] != '\0') (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name)); p = zc->zc_name + strlen(zc->zc_name); do { error = dmu_dir_list_next(os, sizeof (zc->zc_name) - (p - zc->zc_name), p, NULL, &zc->zc_cookie); if (error == ENOENT) error = SET_ERROR(ESRCH); } while (error == 0 && dataset_name_hidden(zc->zc_name)); dmu_objset_rele(os, FTAG); /* * If it's an internal dataset (ie. with a '$' in its name), * don't try to get stats for it, otherwise we'll return ENOENT. */ if (error == 0 && strchr(zc->zc_name, '$') == NULL) { error = zfs_ioc_objset_stats(zc); /* fill in the stats */ if (error == ENOENT) { /* We lost a race with destroy, get the next one. */ zc->zc_name[orig_len] = '\0'; goto top; } } return (error); } /* * inputs: * zc_name name of filesystem * zc_cookie zap cursor * zc_nvlist_dst_size size of buffer for property nvlist * zc_simple when set, only name is requested * * outputs: * zc_name name of next snapshot * zc_objset_stats stats * zc_nvlist_dst property nvlist * zc_nvlist_dst_size size of property nvlist */ static int zfs_ioc_snapshot_list_next(zfs_cmd_t *zc) { objset_t *os; int error; error = dmu_objset_hold(zc->zc_name, FTAG, &os); if (error != 0) { return (error == ENOENT ? ESRCH : error); } /* * A dataset name of maximum length cannot have any snapshots, * so exit immediately. */ if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) { dmu_objset_rele(os, FTAG); return (SET_ERROR(ESRCH)); } error = dmu_snapshot_list_next(os, sizeof (zc->zc_name) - strlen(zc->zc_name), zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie, NULL); if (error == 0 && !zc->zc_simple) { dsl_dataset_t *ds; dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool; error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds); if (error == 0) { objset_t *ossnap; error = dmu_objset_from_ds(ds, &ossnap); if (error == 0) error = zfs_ioc_objset_stats_impl(zc, ossnap); dsl_dataset_rele(ds, FTAG); } } else if (error == ENOENT) { error = SET_ERROR(ESRCH); } dmu_objset_rele(os, FTAG); /* if we failed, undo the @ that we tacked on to zc_name */ if (error != 0) *strchr(zc->zc_name, '@') = '\0'; return (error); } static int zfs_prop_set_userquota(const char *dsname, nvpair_t *pair) { const char *propname = nvpair_name(pair); uint64_t *valary; unsigned int vallen; const char *domain; char *dash; zfs_userquota_prop_t type; uint64_t rid; uint64_t quota; zfsvfs_t *zfsvfs; int err; if (nvpair_type(pair) == DATA_TYPE_NVLIST) { nvlist_t *attrs; VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &pair) != 0) return (SET_ERROR(EINVAL)); } /* * A correctly constructed propname is encoded as * userquota@-. */ if ((dash = strchr(propname, '-')) == NULL || nvpair_value_uint64_array(pair, &valary, &vallen) != 0 || vallen != 3) return (SET_ERROR(EINVAL)); domain = dash + 1; type = valary[0]; rid = valary[1]; quota = valary[2]; err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE); if (err == 0) { err = zfs_set_userquota(zfsvfs, type, domain, rid, quota); zfsvfs_rele(zfsvfs, FTAG); } return (err); } /* * If the named property is one that has a special function to set its value, * return 0 on success and a positive error code on failure; otherwise if it is * not one of the special properties handled by this function, return -1. * * XXX: It would be better for callers of the property interface if we handled * these special cases in dsl_prop.c (in the dsl layer). */ static int zfs_prop_set_special(const char *dsname, zprop_source_t source, nvpair_t *pair) { const char *propname = nvpair_name(pair); zfs_prop_t prop = zfs_name_to_prop(propname); uint64_t intval; int err = -1; if (prop == ZPROP_INVAL) { if (zfs_prop_userquota(propname)) return (zfs_prop_set_userquota(dsname, pair)); return (-1); } if (nvpair_type(pair) == DATA_TYPE_NVLIST) { nvlist_t *attrs; VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &pair) == 0); } if (zfs_prop_get_type(prop) == PROP_TYPE_STRING) return (-1); VERIFY(0 == nvpair_value_uint64(pair, &intval)); switch (prop) { case ZFS_PROP_QUOTA: err = dsl_dir_set_quota(dsname, source, intval); break; case ZFS_PROP_REFQUOTA: err = dsl_dataset_set_refquota(dsname, source, intval); break; case ZFS_PROP_FILESYSTEM_LIMIT: case ZFS_PROP_SNAPSHOT_LIMIT: if (intval == UINT64_MAX) { /* clearing the limit, just do it */ err = 0; } else { err = dsl_dir_activate_fs_ss_limit(dsname); } /* * Set err to -1 to force the zfs_set_prop_nvlist code down the * default path to set the value in the nvlist. */ if (err == 0) err = -1; break; case ZFS_PROP_RESERVATION: err = dsl_dir_set_reservation(dsname, source, intval); break; case ZFS_PROP_REFRESERVATION: err = dsl_dataset_set_refreservation(dsname, source, intval); break; case ZFS_PROP_VOLSIZE: err = zvol_set_volsize(dsname, intval); break; case ZFS_PROP_VERSION: { zfsvfs_t *zfsvfs; if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0) break; err = zfs_set_version(zfsvfs, intval); zfsvfs_rele(zfsvfs, FTAG); if (err == 0 && intval >= ZPL_VERSION_USERSPACE) { zfs_cmd_t *zc; zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); (void) strcpy(zc->zc_name, dsname); (void) zfs_ioc_userspace_upgrade(zc); kmem_free(zc, sizeof (zfs_cmd_t)); } break; } default: err = -1; } return (err); } /* * This function is best effort. If it fails to set any of the given properties, * it continues to set as many as it can and returns the last error * encountered. If the caller provides a non-NULL errlist, it will be filled in * with the list of names of all the properties that failed along with the * corresponding error numbers. * * If every property is set successfully, zero is returned and errlist is not * modified. */ int zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl, nvlist_t *errlist) { nvpair_t *pair; nvpair_t *propval; int rv = 0; uint64_t intval; char *strval; nvlist_t *genericnvl = fnvlist_alloc(); nvlist_t *retrynvl = fnvlist_alloc(); retry: pair = NULL; while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { const char *propname = nvpair_name(pair); zfs_prop_t prop = zfs_name_to_prop(propname); int err = 0; /* decode the property value */ propval = pair; if (nvpair_type(pair) == DATA_TYPE_NVLIST) { nvlist_t *attrs; attrs = fnvpair_value_nvlist(pair); if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &propval) != 0) err = SET_ERROR(EINVAL); } /* Validate value type */ if (err == 0 && prop == ZPROP_INVAL) { if (zfs_prop_user(propname)) { if (nvpair_type(propval) != DATA_TYPE_STRING) err = SET_ERROR(EINVAL); } else if (zfs_prop_userquota(propname)) { if (nvpair_type(propval) != DATA_TYPE_UINT64_ARRAY) err = SET_ERROR(EINVAL); } else { err = SET_ERROR(EINVAL); } } else if (err == 0) { if (nvpair_type(propval) == DATA_TYPE_STRING) { if (zfs_prop_get_type(prop) != PROP_TYPE_STRING) err = SET_ERROR(EINVAL); } else if (nvpair_type(propval) == DATA_TYPE_UINT64) { const char *unused; intval = fnvpair_value_uint64(propval); switch (zfs_prop_get_type(prop)) { case PROP_TYPE_NUMBER: break; case PROP_TYPE_STRING: err = SET_ERROR(EINVAL); break; case PROP_TYPE_INDEX: if (zfs_prop_index_to_string(prop, intval, &unused) != 0) err = SET_ERROR(EINVAL); break; default: cmn_err(CE_PANIC, "unknown property type"); } } else { err = SET_ERROR(EINVAL); } } /* Validate permissions */ if (err == 0) err = zfs_check_settable(dsname, pair, CRED()); if (err == 0) { err = zfs_prop_set_special(dsname, source, pair); if (err == -1) { /* * For better performance we build up a list of * properties to set in a single transaction. */ err = nvlist_add_nvpair(genericnvl, pair); } else if (err != 0 && nvl != retrynvl) { /* * This may be a spurious error caused by * receiving quota and reservation out of order. * Try again in a second pass. */ err = nvlist_add_nvpair(retrynvl, pair); } } if (err != 0) { if (errlist != NULL) fnvlist_add_int32(errlist, propname, err); rv = err; } } if (nvl != retrynvl && !nvlist_empty(retrynvl)) { nvl = retrynvl; goto retry; } if (!nvlist_empty(genericnvl) && dsl_props_set(dsname, source, genericnvl) != 0) { /* * If this fails, we still want to set as many properties as we * can, so try setting them individually. */ pair = NULL; while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) { const char *propname = nvpair_name(pair); int err = 0; propval = pair; if (nvpair_type(pair) == DATA_TYPE_NVLIST) { nvlist_t *attrs; attrs = fnvpair_value_nvlist(pair); propval = fnvlist_lookup_nvpair(attrs, ZPROP_VALUE); } if (nvpair_type(propval) == DATA_TYPE_STRING) { strval = fnvpair_value_string(propval); err = dsl_prop_set_string(dsname, propname, source, strval); } else { intval = fnvpair_value_uint64(propval); err = dsl_prop_set_int(dsname, propname, source, intval); } if (err != 0) { if (errlist != NULL) { fnvlist_add_int32(errlist, propname, err); } rv = err; } } } nvlist_free(genericnvl); nvlist_free(retrynvl); return (rv); } /* * Check that all the properties are valid user properties. */ static int zfs_check_userprops(const char *fsname, nvlist_t *nvl) { nvpair_t *pair = NULL; int error = 0; while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) { const char *propname = nvpair_name(pair); if (!zfs_prop_user(propname) || nvpair_type(pair) != DATA_TYPE_STRING) return (SET_ERROR(EINVAL)); if (error = zfs_secpolicy_write_perms(fsname, ZFS_DELEG_PERM_USERPROP, CRED())) return (error); if (strlen(propname) >= ZAP_MAXNAMELEN) return (SET_ERROR(ENAMETOOLONG)); if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN) return (E2BIG); } return (0); } static void props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops) { nvpair_t *pair; VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); pair = NULL; while ((pair = nvlist_next_nvpair(props, pair)) != NULL) { if (nvlist_exists(skipped, nvpair_name(pair))) continue; VERIFY(nvlist_add_nvpair(*newprops, pair) == 0); } } static int clear_received_props(const char *dsname, nvlist_t *props, nvlist_t *skipped) { int err = 0; nvlist_t *cleared_props = NULL; props_skip(props, skipped, &cleared_props); if (!nvlist_empty(cleared_props)) { /* * Acts on local properties until the dataset has received * properties at least once on or after SPA_VERSION_RECVD_PROPS. */ zprop_source_t flags = (ZPROP_SRC_NONE | (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0)); err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL); } nvlist_free(cleared_props); return (err); } /* * inputs: * zc_name name of filesystem * zc_value name of property to set * zc_nvlist_src{_size} nvlist of properties to apply * zc_cookie received properties flag * * outputs: * zc_nvlist_dst{_size} error for each unapplied received property */ static int zfs_ioc_set_prop(zfs_cmd_t *zc) { nvlist_t *nvl; boolean_t received = zc->zc_cookie; zprop_source_t source = (received ? ZPROP_SRC_RECEIVED : ZPROP_SRC_LOCAL); nvlist_t *errors; int error; if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &nvl)) != 0) return (error); if (received) { nvlist_t *origprops; if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) { (void) clear_received_props(zc->zc_name, origprops, nvl); nvlist_free(origprops); } error = dsl_prop_set_hasrecvd(zc->zc_name); } errors = fnvlist_alloc(); if (error == 0) error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors); if (zc->zc_nvlist_dst != 0 && errors != NULL) { (void) put_nvlist(zc, errors); } nvlist_free(errors); nvlist_free(nvl); return (error); } /* * inputs: * zc_name name of filesystem * zc_value name of property to inherit * zc_cookie revert to received value if TRUE * * outputs: none */ static int zfs_ioc_inherit_prop(zfs_cmd_t *zc) { const char *propname = zc->zc_value; zfs_prop_t prop = zfs_name_to_prop(propname); boolean_t received = zc->zc_cookie; zprop_source_t source = (received ? ZPROP_SRC_NONE /* revert to received value, if any */ : ZPROP_SRC_INHERITED); /* explicitly inherit */ if (received) { nvlist_t *dummy; nvpair_t *pair; zprop_type_t type; int err; /* * zfs_prop_set_special() expects properties in the form of an * nvpair with type info. */ if (prop == ZPROP_INVAL) { if (!zfs_prop_user(propname)) return (SET_ERROR(EINVAL)); type = PROP_TYPE_STRING; } else if (prop == ZFS_PROP_VOLSIZE || prop == ZFS_PROP_VERSION) { return (SET_ERROR(EINVAL)); } else { type = zfs_prop_get_type(prop); } VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0); switch (type) { case PROP_TYPE_STRING: VERIFY(0 == nvlist_add_string(dummy, propname, "")); break; case PROP_TYPE_NUMBER: case PROP_TYPE_INDEX: VERIFY(0 == nvlist_add_uint64(dummy, propname, 0)); break; default: nvlist_free(dummy); return (SET_ERROR(EINVAL)); } pair = nvlist_next_nvpair(dummy, NULL); err = zfs_prop_set_special(zc->zc_name, source, pair); nvlist_free(dummy); if (err != -1) return (err); /* special property already handled */ } else { /* * Only check this in the non-received case. We want to allow * 'inherit -S' to revert non-inheritable properties like quota * and reservation to the received or default values even though * they are not considered inheritable. */ if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop)) return (SET_ERROR(EINVAL)); } /* property name has been validated by zfs_secpolicy_inherit_prop() */ return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source)); } static int zfs_ioc_pool_set_props(zfs_cmd_t *zc) { nvlist_t *props; spa_t *spa; int error; nvpair_t *pair; if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &props)) return (error); /* * If the only property is the configfile, then just do a spa_lookup() * to handle the faulted case. */ pair = nvlist_next_nvpair(props, NULL); if (pair != NULL && strcmp(nvpair_name(pair), zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 && nvlist_next_nvpair(props, pair) == NULL) { mutex_enter(&spa_namespace_lock); if ((spa = spa_lookup(zc->zc_name)) != NULL) { spa_configfile_set(spa, props, B_FALSE); spa_config_sync(spa, B_FALSE, B_TRUE); } mutex_exit(&spa_namespace_lock); if (spa != NULL) { nvlist_free(props); return (0); } } if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { nvlist_free(props); return (error); } error = spa_prop_set(spa, props); nvlist_free(props); spa_close(spa, FTAG); return (error); } static int zfs_ioc_pool_get_props(zfs_cmd_t *zc) { spa_t *spa; int error; nvlist_t *nvp = NULL; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) { /* * If the pool is faulted, there may be properties we can still * get (such as altroot and cachefile), so attempt to get them * anyway. */ mutex_enter(&spa_namespace_lock); if ((spa = spa_lookup(zc->zc_name)) != NULL) error = spa_prop_get(spa, &nvp); mutex_exit(&spa_namespace_lock); } else { error = spa_prop_get(spa, &nvp); spa_close(spa, FTAG); } if (error == 0 && zc->zc_nvlist_dst != 0) error = put_nvlist(zc, nvp); else error = SET_ERROR(EFAULT); nvlist_free(nvp); return (error); } /* * inputs: * zc_name name of filesystem * zc_nvlist_src{_size} nvlist of delegated permissions * zc_perm_action allow/unallow flag * * outputs: none */ static int zfs_ioc_set_fsacl(zfs_cmd_t *zc) { int error; nvlist_t *fsaclnv = NULL; if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &fsaclnv)) != 0) return (error); /* * Verify nvlist is constructed correctly */ if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) { nvlist_free(fsaclnv); return (SET_ERROR(EINVAL)); } /* * If we don't have PRIV_SYS_MOUNT, then validate * that user is allowed to hand out each permission in * the nvlist(s) */ error = secpolicy_zfs(CRED()); if (error != 0) { if (zc->zc_perm_action == B_FALSE) { error = dsl_deleg_can_allow(zc->zc_name, fsaclnv, CRED()); } else { error = dsl_deleg_can_unallow(zc->zc_name, fsaclnv, CRED()); } } if (error == 0) error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action); nvlist_free(fsaclnv); return (error); } /* * inputs: * zc_name name of filesystem * * outputs: * zc_nvlist_src{_size} nvlist of delegated permissions */ static int zfs_ioc_get_fsacl(zfs_cmd_t *zc) { nvlist_t *nvp; int error; if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) { error = put_nvlist(zc, nvp); nvlist_free(nvp); } return (error); } /* * Search the vfs list for a specified resource. Returns a pointer to it * or NULL if no suitable entry is found. The caller of this routine * is responsible for releasing the returned vfs pointer. */ static vfs_t * zfs_get_vfs(const char *resource) { vfs_t *vfsp; mtx_lock(&mountlist_mtx); TAILQ_FOREACH(vfsp, &mountlist, mnt_list) { if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) { - VFS_HOLD(vfsp); + if (vfs_busy(vfsp, MBF_MNTLSTLOCK) != 0) + vfsp = NULL; break; } } - mtx_unlock(&mountlist_mtx); + if (vfsp == NULL) + mtx_unlock(&mountlist_mtx); return (vfsp); } /* ARGSUSED */ static void zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx) { zfs_creat_t *zct = arg; zfs_create_fs(os, cr, zct->zct_zplprops, tx); } #define ZFS_PROP_UNDEFINED ((uint64_t)-1) /* * inputs: * os parent objset pointer (NULL if root fs) * fuids_ok fuids allowed in this version of the spa? * sa_ok SAs allowed in this version of the spa? * createprops list of properties requested by creator * * outputs: * zplprops values for the zplprops we attach to the master node object * is_ci true if requested file system will be purely case-insensitive * * Determine the settings for utf8only, normalization and * casesensitivity. Specific values may have been requested by the * creator and/or we can inherit values from the parent dataset. If * the file system is of too early a vintage, a creator can not * request settings for these properties, even if the requested * setting is the default value. We don't actually want to create dsl * properties for these, so remove them from the source nvlist after * processing. */ static int zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver, boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops, nvlist_t *zplprops, boolean_t *is_ci) { uint64_t sense = ZFS_PROP_UNDEFINED; uint64_t norm = ZFS_PROP_UNDEFINED; uint64_t u8 = ZFS_PROP_UNDEFINED; ASSERT(zplprops != NULL); /* * Pull out creator prop choices, if any. */ if (createprops) { (void) nvlist_lookup_uint64(createprops, zfs_prop_to_name(ZFS_PROP_VERSION), &zplver); (void) nvlist_lookup_uint64(createprops, zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm); (void) nvlist_remove_all(createprops, zfs_prop_to_name(ZFS_PROP_NORMALIZE)); (void) nvlist_lookup_uint64(createprops, zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8); (void) nvlist_remove_all(createprops, zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); (void) nvlist_lookup_uint64(createprops, zfs_prop_to_name(ZFS_PROP_CASE), &sense); (void) nvlist_remove_all(createprops, zfs_prop_to_name(ZFS_PROP_CASE)); } /* * If the zpl version requested is whacky or the file system * or pool is version is too "young" to support normalization * and the creator tried to set a value for one of the props, * error out. */ if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) || (zplver >= ZPL_VERSION_FUID && !fuids_ok) || (zplver >= ZPL_VERSION_SA && !sa_ok) || (zplver < ZPL_VERSION_NORMALIZATION && (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED || sense != ZFS_PROP_UNDEFINED))) return (SET_ERROR(ENOTSUP)); /* * Put the version in the zplprops */ VERIFY(nvlist_add_uint64(zplprops, zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0); if (norm == ZFS_PROP_UNDEFINED) VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0); VERIFY(nvlist_add_uint64(zplprops, zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0); /* * If we're normalizing, names must always be valid UTF-8 strings. */ if (norm) u8 = 1; if (u8 == ZFS_PROP_UNDEFINED) VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0); VERIFY(nvlist_add_uint64(zplprops, zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0); if (sense == ZFS_PROP_UNDEFINED) VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0); VERIFY(nvlist_add_uint64(zplprops, zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0); if (is_ci) *is_ci = (sense == ZFS_CASE_INSENSITIVE); return (0); } static int zfs_fill_zplprops(const char *dataset, nvlist_t *createprops, nvlist_t *zplprops, boolean_t *is_ci) { boolean_t fuids_ok, sa_ok; uint64_t zplver = ZPL_VERSION; objset_t *os = NULL; char parentname[MAXNAMELEN]; char *cp; spa_t *spa; uint64_t spa_vers; int error; (void) strlcpy(parentname, dataset, sizeof (parentname)); cp = strrchr(parentname, '/'); ASSERT(cp != NULL); cp[0] = '\0'; if ((error = spa_open(dataset, &spa, FTAG)) != 0) return (error); spa_vers = spa_version(spa); spa_close(spa, FTAG); zplver = zfs_zpl_version_map(spa_vers); fuids_ok = (zplver >= ZPL_VERSION_FUID); sa_ok = (zplver >= ZPL_VERSION_SA); /* * Open parent object set so we can inherit zplprop values. */ if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0) return (error); error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops, zplprops, is_ci); dmu_objset_rele(os, FTAG); return (error); } static int zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops, nvlist_t *zplprops, boolean_t *is_ci) { boolean_t fuids_ok; boolean_t sa_ok; uint64_t zplver = ZPL_VERSION; int error; zplver = zfs_zpl_version_map(spa_vers); fuids_ok = (zplver >= ZPL_VERSION_FUID); sa_ok = (zplver >= ZPL_VERSION_SA); error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok, createprops, zplprops, is_ci); return (error); } /* * innvl: { * "type" -> dmu_objset_type_t (int32) * (optional) "props" -> { prop -> value } * } * * outnvl: propname -> error code (int32) */ static int zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) { int error = 0; zfs_creat_t zct = { 0 }; nvlist_t *nvprops = NULL; void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx); int32_t type32; dmu_objset_type_t type; boolean_t is_insensitive = B_FALSE; if (nvlist_lookup_int32(innvl, "type", &type32) != 0) return (SET_ERROR(EINVAL)); type = type32; (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); switch (type) { case DMU_OST_ZFS: cbfunc = zfs_create_cb; break; case DMU_OST_ZVOL: cbfunc = zvol_create_cb; break; default: cbfunc = NULL; break; } if (strchr(fsname, '@') || strchr(fsname, '%')) return (SET_ERROR(EINVAL)); zct.zct_props = nvprops; if (cbfunc == NULL) return (SET_ERROR(EINVAL)); if (type == DMU_OST_ZVOL) { uint64_t volsize, volblocksize; if (nvprops == NULL) return (SET_ERROR(EINVAL)); if (nvlist_lookup_uint64(nvprops, zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0) return (SET_ERROR(EINVAL)); if ((error = nvlist_lookup_uint64(nvprops, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &volblocksize)) != 0 && error != ENOENT) return (SET_ERROR(EINVAL)); if (error != 0) volblocksize = zfs_prop_default_numeric( ZFS_PROP_VOLBLOCKSIZE); if ((error = zvol_check_volblocksize( volblocksize)) != 0 || (error = zvol_check_volsize(volsize, volblocksize)) != 0) return (error); } else if (type == DMU_OST_ZFS) { int error; /* * We have to have normalization and * case-folding flags correct when we do the * file system creation, so go figure them out * now. */ VERIFY(nvlist_alloc(&zct.zct_zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); error = zfs_fill_zplprops(fsname, nvprops, zct.zct_zplprops, &is_insensitive); if (error != 0) { nvlist_free(zct.zct_zplprops); return (error); } } error = dmu_objset_create(fsname, type, is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct); nvlist_free(zct.zct_zplprops); /* * It would be nice to do this atomically. */ if (error == 0) { error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, nvprops, outnvl); if (error != 0) (void) dsl_destroy_head(fsname); } #ifdef __FreeBSD__ if (error == 0 && type == DMU_OST_ZVOL) zvol_create_minors(fsname); #endif return (error); } /* * innvl: { * "origin" -> name of origin snapshot * (optional) "props" -> { prop -> value } * } * * outnvl: propname -> error code (int32) */ static int zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) { int error = 0; nvlist_t *nvprops = NULL; char *origin_name; if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0) return (SET_ERROR(EINVAL)); (void) nvlist_lookup_nvlist(innvl, "props", &nvprops); if (strchr(fsname, '@') || strchr(fsname, '%')) return (SET_ERROR(EINVAL)); if (dataset_namecheck(origin_name, NULL, NULL) != 0) return (SET_ERROR(EINVAL)); error = dmu_objset_clone(fsname, origin_name); if (error != 0) return (error); /* * It would be nice to do this atomically. */ if (error == 0) { error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL, nvprops, outnvl); if (error != 0) (void) dsl_destroy_head(fsname); } #ifdef __FreeBSD__ if (error == 0) zvol_create_minors(fsname); #endif return (error); } /* * innvl: { * "snaps" -> { snapshot1, snapshot2 } * (optional) "props" -> { prop -> value (string) } * } * * outnvl: snapshot -> error code (int32) */ static int zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) { nvlist_t *snaps; nvlist_t *props = NULL; int error, poollen; nvpair_t *pair; (void) nvlist_lookup_nvlist(innvl, "props", &props); if ((error = zfs_check_userprops(poolname, props)) != 0) return (error); if (!nvlist_empty(props) && zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS)) return (SET_ERROR(ENOTSUP)); if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) return (SET_ERROR(EINVAL)); poollen = strlen(poolname); for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; pair = nvlist_next_nvpair(snaps, pair)) { const char *name = nvpair_name(pair); const char *cp = strchr(name, '@'); /* * The snap name must contain an @, and the part after it must * contain only valid characters. */ if (cp == NULL || zfs_component_namecheck(cp + 1, NULL, NULL) != 0) return (SET_ERROR(EINVAL)); /* * The snap must be in the specified pool. */ if (strncmp(name, poolname, poollen) != 0 || (name[poollen] != '/' && name[poollen] != '@')) return (SET_ERROR(EXDEV)); /* This must be the only snap of this fs. */ for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair); pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) { if (strncmp(name, nvpair_name(pair2), cp - name + 1) == 0) { return (SET_ERROR(EXDEV)); } } } error = dsl_dataset_snapshot(snaps, props, outnvl); return (error); } /* * innvl: "message" -> string */ /* ARGSUSED */ static int zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl) { char *message; spa_t *spa; int error; char *poolname; /* * The poolname in the ioctl is not set, we get it from the TSD, * which was set at the end of the last successful ioctl that allows * logging. The secpolicy func already checked that it is set. * Only one log ioctl is allowed after each successful ioctl, so * we clear the TSD here. */ poolname = tsd_get(zfs_allow_log_key); (void) tsd_set(zfs_allow_log_key, NULL); error = spa_open(poolname, &spa, FTAG); strfree(poolname); if (error != 0) return (error); if (nvlist_lookup_string(innvl, "message", &message) != 0) { spa_close(spa, FTAG); return (SET_ERROR(EINVAL)); } if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) { spa_close(spa, FTAG); return (SET_ERROR(ENOTSUP)); } error = spa_history_log(spa, message); spa_close(spa, FTAG); return (error); } /* * The dp_config_rwlock must not be held when calling this, because the * unmount may need to write out data. * * This function is best-effort. Callers must deal gracefully if it * remains mounted (or is remounted after this call). * * Returns 0 if the argument is not a snapshot, or it is not currently a * filesystem, or we were able to unmount it. Returns error code otherwise. */ int zfs_unmount_snap(const char *snapname) { vfs_t *vfsp; zfsvfs_t *zfsvfs; int err; if (strchr(snapname, '@') == NULL) return (0); vfsp = zfs_get_vfs(snapname); if (vfsp == NULL) return (0); zfsvfs = vfsp->vfs_data; ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os))); err = vn_vfswlock(vfsp->vfs_vnodecovered); +#ifdef illumos VFS_RELE(vfsp); +#else + vfs_unbusy(vfsp); +#endif if (err != 0) return (SET_ERROR(err)); /* * Always force the unmount for snapshots. */ #ifdef illumos (void) dounmount(vfsp, MS_FORCE, kcred); #else vfs_ref(vfsp); (void) dounmount(vfsp, MS_FORCE, curthread); #endif return (0); } /* ARGSUSED */ static int zfs_unmount_snap_cb(const char *snapname, void *arg) { return (zfs_unmount_snap(snapname)); } /* * When a clone is destroyed, its origin may also need to be destroyed, * in which case it must be unmounted. This routine will do that unmount * if necessary. */ void zfs_destroy_unmount_origin(const char *fsname) { int error; objset_t *os; dsl_dataset_t *ds; error = dmu_objset_hold(fsname, FTAG, &os); if (error != 0) return; ds = dmu_objset_ds(os); if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) { char originname[MAXNAMELEN]; dsl_dataset_name(ds->ds_prev, originname); dmu_objset_rele(os, FTAG); (void) zfs_unmount_snap(originname); } else { dmu_objset_rele(os, FTAG); } } /* * innvl: { * "snaps" -> { snapshot1, snapshot2 } * (optional boolean) "defer" * } * * outnvl: snapshot -> error code (int32) * */ /* ARGSUSED */ static int zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) { int error, poollen; nvlist_t *snaps; nvpair_t *pair; boolean_t defer; if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0) return (SET_ERROR(EINVAL)); defer = nvlist_exists(innvl, "defer"); poollen = strlen(poolname); for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL; pair = nvlist_next_nvpair(snaps, pair)) { const char *name = nvpair_name(pair); /* * The snap must be in the specified pool to prevent the * invalid removal of zvol minors below. */ if (strncmp(name, poolname, poollen) != 0 || (name[poollen] != '/' && name[poollen] != '@')) return (SET_ERROR(EXDEV)); error = zfs_unmount_snap(name); if (error != 0) return (error); #if defined(__FreeBSD__) zvol_remove_minors(name); #endif } return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl)); } /* * Create bookmarks. Bookmark names are of the form #. * All bookmarks must be in the same pool. * * innvl: { * bookmark1 -> snapshot1, bookmark2 -> snapshot2 * } * * outnvl: bookmark -> error code (int32) * */ /* ARGSUSED */ static int zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) { for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { char *snap_name; /* * Verify the snapshot argument. */ if (nvpair_value_string(pair, &snap_name) != 0) return (SET_ERROR(EINVAL)); /* Verify that the keys (bookmarks) are unique */ for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair); pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) { if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0) return (SET_ERROR(EINVAL)); } } return (dsl_bookmark_create(innvl, outnvl)); } /* * innvl: { * property 1, property 2, ... * } * * outnvl: { * bookmark name 1 -> { property 1, property 2, ... }, * bookmark name 2 -> { property 1, property 2, ... } * } * */ static int zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl) { return (dsl_get_bookmarks(fsname, innvl, outnvl)); } /* * innvl: { * bookmark name 1, bookmark name 2 * } * * outnvl: bookmark -> error code (int32) * */ static int zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl) { int error, poollen; poollen = strlen(poolname); for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL); pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) { const char *name = nvpair_name(pair); const char *cp = strchr(name, '#'); /* * The bookmark name must contain an #, and the part after it * must contain only valid characters. */ if (cp == NULL || zfs_component_namecheck(cp + 1, NULL, NULL) != 0) return (SET_ERROR(EINVAL)); /* * The bookmark must be in the specified pool. */ if (strncmp(name, poolname, poollen) != 0 || (name[poollen] != '/' && name[poollen] != '#')) return (SET_ERROR(EXDEV)); } error = dsl_bookmark_destroy(innvl, outnvl); return (error); } /* * inputs: * zc_name name of dataset to destroy * zc_objset_type type of objset * zc_defer_destroy mark for deferred destroy * * outputs: none */ static int zfs_ioc_destroy(zfs_cmd_t *zc) { int err; if (zc->zc_objset_type == DMU_OST_ZFS) { err = zfs_unmount_snap(zc->zc_name); if (err != 0) return (err); } if (strchr(zc->zc_name, '@')) err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy); else err = dsl_destroy_head(zc->zc_name); if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0) #ifdef __FreeBSD__ zvol_remove_minors(zc->zc_name); #else (void) zvol_remove_minor(zc->zc_name); #endif return (err); } /* * fsname is name of dataset to rollback (to most recent snapshot) * * innvl is not used. * * outnvl: "target" -> name of most recent snapshot * } */ /* ARGSUSED */ static int zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl) { zfsvfs_t *zfsvfs; int error; if (getzfsvfs(fsname, &zfsvfs) == 0) { error = zfs_suspend_fs(zfsvfs); if (error == 0) { int resume_err; error = dsl_dataset_rollback(fsname, zfsvfs, outnvl); resume_err = zfs_resume_fs(zfsvfs, fsname); error = error ? error : resume_err; } +#ifdef illumos VFS_RELE(zfsvfs->z_vfs); +#else + vfs_unbusy(zfsvfs->z_vfs); +#endif } else { error = dsl_dataset_rollback(fsname, NULL, outnvl); } return (error); } static int recursive_unmount(const char *fsname, void *arg) { const char *snapname = arg; char fullname[MAXNAMELEN]; (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname); return (zfs_unmount_snap(fullname)); } /* * inputs: * zc_name old name of dataset * zc_value new name of dataset * zc_cookie recursive flag (only valid for snapshots) * * outputs: none */ static int zfs_ioc_rename(zfs_cmd_t *zc) { boolean_t recursive = zc->zc_cookie & 1; char *at; boolean_t allow_mounted = B_TRUE; #ifdef __FreeBSD__ allow_mounted = (zc->zc_cookie & 2) != 0; #endif zc->zc_value[sizeof (zc->zc_value) - 1] = '\0'; if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || strchr(zc->zc_value, '%')) return (SET_ERROR(EINVAL)); at = strchr(zc->zc_name, '@'); if (at != NULL) { /* snaps must be in same fs */ int error; if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1)) return (SET_ERROR(EXDEV)); *at = '\0'; if (zc->zc_objset_type == DMU_OST_ZFS && allow_mounted) { error = dmu_objset_find(zc->zc_name, recursive_unmount, at + 1, recursive ? DS_FIND_CHILDREN : 0); if (error != 0) { *at = '@'; return (error); } } error = dsl_dataset_rename_snapshot(zc->zc_name, at + 1, strchr(zc->zc_value, '@') + 1, recursive); *at = '@'; return (error); } else { #ifdef illumos if (zc->zc_objset_type == DMU_OST_ZVOL) (void) zvol_remove_minor(zc->zc_name); #endif return (dsl_dir_rename(zc->zc_name, zc->zc_value)); } } static int zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr) { const char *propname = nvpair_name(pair); boolean_t issnap = (strchr(dsname, '@') != NULL); zfs_prop_t prop = zfs_name_to_prop(propname); uint64_t intval; int err; if (prop == ZPROP_INVAL) { if (zfs_prop_user(propname)) { if (err = zfs_secpolicy_write_perms(dsname, ZFS_DELEG_PERM_USERPROP, cr)) return (err); return (0); } if (!issnap && zfs_prop_userquota(propname)) { const char *perm = NULL; const char *uq_prefix = zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA]; const char *gq_prefix = zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA]; if (strncmp(propname, uq_prefix, strlen(uq_prefix)) == 0) { perm = ZFS_DELEG_PERM_USERQUOTA; } else if (strncmp(propname, gq_prefix, strlen(gq_prefix)) == 0) { perm = ZFS_DELEG_PERM_GROUPQUOTA; } else { /* USERUSED and GROUPUSED are read-only */ return (SET_ERROR(EINVAL)); } if (err = zfs_secpolicy_write_perms(dsname, perm, cr)) return (err); return (0); } return (SET_ERROR(EINVAL)); } if (issnap) return (SET_ERROR(EINVAL)); if (nvpair_type(pair) == DATA_TYPE_NVLIST) { /* * dsl_prop_get_all_impl() returns properties in this * format. */ nvlist_t *attrs; VERIFY(nvpair_value_nvlist(pair, &attrs) == 0); VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &pair) == 0); } /* * Check that this value is valid for this pool version */ switch (prop) { case ZFS_PROP_COMPRESSION: /* * If the user specified gzip compression, make sure * the SPA supports it. We ignore any errors here since * we'll catch them later. */ if (nvpair_value_uint64(pair, &intval) == 0) { if (intval >= ZIO_COMPRESS_GZIP_1 && intval <= ZIO_COMPRESS_GZIP_9 && zfs_earlier_version(dsname, SPA_VERSION_GZIP_COMPRESSION)) { return (SET_ERROR(ENOTSUP)); } if (intval == ZIO_COMPRESS_ZLE && zfs_earlier_version(dsname, SPA_VERSION_ZLE_COMPRESSION)) return (SET_ERROR(ENOTSUP)); if (intval == ZIO_COMPRESS_LZ4) { spa_t *spa; if ((err = spa_open(dsname, &spa, FTAG)) != 0) return (err); if (!spa_feature_is_enabled(spa, SPA_FEATURE_LZ4_COMPRESS)) { spa_close(spa, FTAG); return (SET_ERROR(ENOTSUP)); } spa_close(spa, FTAG); } /* * If this is a bootable dataset then * verify that the compression algorithm * is supported for booting. We must return * something other than ENOTSUP since it * implies a downrev pool version. */ if (zfs_is_bootfs(dsname) && !BOOTFS_COMPRESS_VALID(intval)) { return (SET_ERROR(ERANGE)); } } break; case ZFS_PROP_COPIES: if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS)) return (SET_ERROR(ENOTSUP)); break; case ZFS_PROP_RECORDSIZE: /* Record sizes above 128k need the feature to be enabled */ if (nvpair_value_uint64(pair, &intval) == 0 && intval > SPA_OLD_MAXBLOCKSIZE) { spa_t *spa; /* * If this is a bootable dataset then * the we don't allow large (>128K) blocks, * because GRUB doesn't support them. */ if (zfs_is_bootfs(dsname) && intval > SPA_OLD_MAXBLOCKSIZE) { return (SET_ERROR(ERANGE)); } /* * We don't allow setting the property above 1MB, * unless the tunable has been changed. */ if (intval > zfs_max_recordsize || intval > SPA_MAXBLOCKSIZE) return (SET_ERROR(ERANGE)); if ((err = spa_open(dsname, &spa, FTAG)) != 0) return (err); if (!spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) { spa_close(spa, FTAG); return (SET_ERROR(ENOTSUP)); } spa_close(spa, FTAG); } break; case ZFS_PROP_SHARESMB: if (zpl_earlier_version(dsname, ZPL_VERSION_FUID)) return (SET_ERROR(ENOTSUP)); break; case ZFS_PROP_ACLINHERIT: if (nvpair_type(pair) == DATA_TYPE_UINT64 && nvpair_value_uint64(pair, &intval) == 0) { if (intval == ZFS_ACL_PASSTHROUGH_X && zfs_earlier_version(dsname, SPA_VERSION_PASSTHROUGH_X)) return (SET_ERROR(ENOTSUP)); } break; case ZFS_PROP_CHECKSUM: case ZFS_PROP_DEDUP: { spa_feature_t feature; spa_t *spa; /* dedup feature version checks */ if (prop == ZFS_PROP_DEDUP && zfs_earlier_version(dsname, SPA_VERSION_DEDUP)) return (SET_ERROR(ENOTSUP)); if (nvpair_value_uint64(pair, &intval) != 0) return (SET_ERROR(EINVAL)); /* check prop value is enabled in features */ feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK); if (feature == SPA_FEATURE_NONE) break; if ((err = spa_open(dsname, &spa, FTAG)) != 0) return (err); /* * Salted checksums are not supported on root pools. */ if (spa_bootfs(spa) != 0 && intval < ZIO_CHECKSUM_FUNCTIONS && (zio_checksum_table[intval].ci_flags & ZCHECKSUM_FLAG_SALTED)) { spa_close(spa, FTAG); return (SET_ERROR(ERANGE)); } if (!spa_feature_is_enabled(spa, feature)) { spa_close(spa, FTAG); return (SET_ERROR(ENOTSUP)); } spa_close(spa, FTAG); break; } } return (zfs_secpolicy_setprop(dsname, prop, pair, CRED())); } /* * Checks for a race condition to make sure we don't increment a feature flag * multiple times. */ static int zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx) { spa_t *spa = dmu_tx_pool(tx)->dp_spa; spa_feature_t *featurep = arg; if (!spa_feature_is_active(spa, *featurep)) return (0); else return (SET_ERROR(EBUSY)); } /* * The callback invoked on feature activation in the sync task caused by * zfs_prop_activate_feature. */ static void zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx) { spa_t *spa = dmu_tx_pool(tx)->dp_spa; spa_feature_t *featurep = arg; spa_feature_incr(spa, *featurep, tx); } /* * Activates a feature on a pool in response to a property setting. This * creates a new sync task which modifies the pool to reflect the feature * as being active. */ static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature) { int err; /* EBUSY here indicates that the feature is already active */ err = dsl_sync_task(spa_name(spa), zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync, &feature, 2, ZFS_SPACE_CHECK_RESERVED); if (err != 0 && err != EBUSY) return (err); else return (0); } /* * Removes properties from the given props list that fail permission checks * needed to clear them and to restore them in case of a receive error. For each * property, make sure we have both set and inherit permissions. * * Returns the first error encountered if any permission checks fail. If the * caller provides a non-NULL errlist, it also gives the complete list of names * of all the properties that failed a permission check along with the * corresponding error numbers. The caller is responsible for freeing the * returned errlist. * * If every property checks out successfully, zero is returned and the list * pointed at by errlist is NULL. */ static int zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist) { zfs_cmd_t *zc; nvpair_t *pair, *next_pair; nvlist_t *errors; int err, rv = 0; if (props == NULL) return (0); VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0); zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP); (void) strcpy(zc->zc_name, dataset); pair = nvlist_next_nvpair(props, NULL); while (pair != NULL) { next_pair = nvlist_next_nvpair(props, pair); (void) strcpy(zc->zc_value, nvpair_name(pair)); if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 || (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) { VERIFY(nvlist_remove_nvpair(props, pair) == 0); VERIFY(nvlist_add_int32(errors, zc->zc_value, err) == 0); } pair = next_pair; } kmem_free(zc, sizeof (zfs_cmd_t)); if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) { nvlist_free(errors); errors = NULL; } else { VERIFY(nvpair_value_int32(pair, &rv) == 0); } if (errlist == NULL) nvlist_free(errors); else *errlist = errors; return (rv); } static boolean_t propval_equals(nvpair_t *p1, nvpair_t *p2) { if (nvpair_type(p1) == DATA_TYPE_NVLIST) { /* dsl_prop_get_all_impl() format */ nvlist_t *attrs; VERIFY(nvpair_value_nvlist(p1, &attrs) == 0); VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &p1) == 0); } if (nvpair_type(p2) == DATA_TYPE_NVLIST) { nvlist_t *attrs; VERIFY(nvpair_value_nvlist(p2, &attrs) == 0); VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE, &p2) == 0); } if (nvpair_type(p1) != nvpair_type(p2)) return (B_FALSE); if (nvpair_type(p1) == DATA_TYPE_STRING) { char *valstr1, *valstr2; VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0); VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0); return (strcmp(valstr1, valstr2) == 0); } else { uint64_t intval1, intval2; VERIFY(nvpair_value_uint64(p1, &intval1) == 0); VERIFY(nvpair_value_uint64(p2, &intval2) == 0); return (intval1 == intval2); } } /* * Remove properties from props if they are not going to change (as determined * by comparison with origprops). Remove them from origprops as well, since we * do not need to clear or restore properties that won't change. */ static void props_reduce(nvlist_t *props, nvlist_t *origprops) { nvpair_t *pair, *next_pair; if (origprops == NULL) return; /* all props need to be received */ pair = nvlist_next_nvpair(props, NULL); while (pair != NULL) { const char *propname = nvpair_name(pair); nvpair_t *match; next_pair = nvlist_next_nvpair(props, pair); if ((nvlist_lookup_nvpair(origprops, propname, &match) != 0) || !propval_equals(pair, match)) goto next; /* need to set received value */ /* don't clear the existing received value */ (void) nvlist_remove_nvpair(origprops, match); /* don't bother receiving the property */ (void) nvlist_remove_nvpair(props, pair); next: pair = next_pair; } } /* * Extract properties that cannot be set PRIOR to the receipt of a dataset. * For example, refquota cannot be set until after the receipt of a dataset, * because in replication streams, an older/earlier snapshot may exceed the * refquota. We want to receive the older/earlier snapshot, but setting * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent * the older/earlier snapshot from being received (with EDQUOT). * * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario. * * libzfs will need to be judicious handling errors encountered by props * extracted by this function. */ static nvlist_t * extract_delay_props(nvlist_t *props) { nvlist_t *delayprops; nvpair_t *nvp, *tmp; static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 }; int i; VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0); for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL; nvp = nvlist_next_nvpair(props, nvp)) { /* * strcmp() is safe because zfs_prop_to_name() always returns * a bounded string. */ for (i = 0; delayable[i] != 0; i++) { if (strcmp(zfs_prop_to_name(delayable[i]), nvpair_name(nvp)) == 0) { break; } } if (delayable[i] != 0) { tmp = nvlist_prev_nvpair(props, nvp); VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0); VERIFY(nvlist_remove_nvpair(props, nvp) == 0); nvp = tmp; } } if (nvlist_empty(delayprops)) { nvlist_free(delayprops); delayprops = NULL; } return (delayprops); } #ifdef DEBUG static boolean_t zfs_ioc_recv_inject_err; #endif /* * inputs: * zc_name name of containing filesystem * zc_nvlist_src{_size} nvlist of properties to apply * zc_value name of snapshot to create * zc_string name of clone origin (if DRR_FLAG_CLONE) * zc_cookie file descriptor to recv from * zc_begin_record the BEGIN record of the stream (not byteswapped) * zc_guid force flag * zc_cleanup_fd cleanup-on-exit file descriptor * zc_action_handle handle for this guid/ds mapping (or zero on first call) * zc_resumable if data is incomplete assume sender will resume * * outputs: * zc_cookie number of bytes read * zc_nvlist_dst{_size} error for each unapplied received property * zc_obj zprop_errflags_t * zc_action_handle handle for this guid/ds mapping */ static int zfs_ioc_recv(zfs_cmd_t *zc) { file_t *fp; dmu_recv_cookie_t drc; boolean_t force = (boolean_t)zc->zc_guid; int fd; int error = 0; int props_error = 0; nvlist_t *errors; offset_t off; nvlist_t *props = NULL; /* sent properties */ nvlist_t *origprops = NULL; /* existing properties */ nvlist_t *delayprops = NULL; /* sent properties applied post-receive */ char *origin = NULL; char *tosnap; char tofs[ZFS_MAXNAMELEN]; cap_rights_t rights; boolean_t first_recvd_props = B_FALSE; if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 || strchr(zc->zc_value, '@') == NULL || strchr(zc->zc_value, '%')) return (SET_ERROR(EINVAL)); (void) strcpy(tofs, zc->zc_value); tosnap = strchr(tofs, '@'); *tosnap++ = '\0'; if (zc->zc_nvlist_src != 0 && (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &props)) != 0) return (error); fd = zc->zc_cookie; #ifdef illumos fp = getf(fd); #else fget_read(curthread, fd, cap_rights_init(&rights, CAP_PREAD), &fp); #endif if (fp == NULL) { nvlist_free(props); return (SET_ERROR(EBADF)); } errors = fnvlist_alloc(); if (zc->zc_string[0]) origin = zc->zc_string; error = dmu_recv_begin(tofs, tosnap, &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc); if (error != 0) goto out; /* * Set properties before we receive the stream so that they are applied * to the new data. Note that we must call dmu_recv_stream() if * dmu_recv_begin() succeeds. */ if (props != NULL && !drc.drc_newfs) { if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >= SPA_VERSION_RECVD_PROPS && !dsl_prop_get_hasrecvd(tofs)) first_recvd_props = B_TRUE; /* * If new received properties are supplied, they are to * completely replace the existing received properties, so stash * away the existing ones. */ if (dsl_prop_get_received(tofs, &origprops) == 0) { nvlist_t *errlist = NULL; /* * Don't bother writing a property if its value won't * change (and avoid the unnecessary security checks). * * The first receive after SPA_VERSION_RECVD_PROPS is a * special case where we blow away all local properties * regardless. */ if (!first_recvd_props) props_reduce(props, origprops); if (zfs_check_clearable(tofs, origprops, &errlist) != 0) (void) nvlist_merge(errors, errlist, 0); nvlist_free(errlist); if (clear_received_props(tofs, origprops, first_recvd_props ? NULL : props) != 0) zc->zc_obj |= ZPROP_ERR_NOCLEAR; } else { zc->zc_obj |= ZPROP_ERR_NOCLEAR; } } if (props != NULL) { props_error = dsl_prop_set_hasrecvd(tofs); if (props_error == 0) { delayprops = extract_delay_props(props); (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, props, errors); } } off = fp->f_offset; error = dmu_recv_stream(&drc, fp, &off, zc->zc_cleanup_fd, &zc->zc_action_handle); if (error == 0) { zfsvfs_t *zfsvfs = NULL; if (getzfsvfs(tofs, &zfsvfs) == 0) { /* online recv */ int end_err; error = zfs_suspend_fs(zfsvfs); /* * If the suspend fails, then the recv_end will * likely also fail, and clean up after itself. */ end_err = dmu_recv_end(&drc, zfsvfs); if (error == 0) error = zfs_resume_fs(zfsvfs, tofs); error = error ? error : end_err; +#ifdef illumos VFS_RELE(zfsvfs->z_vfs); +#else + vfs_unbusy(zfsvfs->z_vfs); +#endif } else { error = dmu_recv_end(&drc, NULL); } /* Set delayed properties now, after we're done receiving. */ if (delayprops != NULL && error == 0) { (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED, delayprops, errors); } } if (delayprops != NULL) { /* * Merge delayed props back in with initial props, in case * we're DEBUG and zfs_ioc_recv_inject_err is set (which means * we have to make sure clear_received_props() includes * the delayed properties). * * Since zfs_ioc_recv_inject_err is only in DEBUG kernels, * using ASSERT() will be just like a VERIFY. */ ASSERT(nvlist_merge(props, delayprops, 0) == 0); nvlist_free(delayprops); } /* * Now that all props, initial and delayed, are set, report the prop * errors to the caller. */ if (zc->zc_nvlist_dst_size != 0 && (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 || put_nvlist(zc, errors) != 0)) { /* * Caller made zc->zc_nvlist_dst less than the minimum expected * size or supplied an invalid address. */ props_error = SET_ERROR(EINVAL); } zc->zc_cookie = off - fp->f_offset; if (off >= 0 && off <= MAXOFFSET_T) fp->f_offset = off; #ifdef DEBUG if (zfs_ioc_recv_inject_err) { zfs_ioc_recv_inject_err = B_FALSE; error = 1; } #endif #ifdef __FreeBSD__ if (error == 0) zvol_create_minors(tofs); #endif /* * On error, restore the original props. */ if (error != 0 && props != NULL && !drc.drc_newfs) { if (clear_received_props(tofs, props, NULL) != 0) { /* * We failed to clear the received properties. * Since we may have left a $recvd value on the * system, we can't clear the $hasrecvd flag. */ zc->zc_obj |= ZPROP_ERR_NORESTORE; } else if (first_recvd_props) { dsl_prop_unset_hasrecvd(tofs); } if (origprops == NULL && !drc.drc_newfs) { /* We failed to stash the original properties. */ zc->zc_obj |= ZPROP_ERR_NORESTORE; } /* * dsl_props_set() will not convert RECEIVED to LOCAL on or * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL * explictly if we're restoring local properties cleared in the * first new-style receive. */ if (origprops != NULL && zfs_set_prop_nvlist(tofs, (first_recvd_props ? ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED), origprops, NULL) != 0) { /* * We stashed the original properties but failed to * restore them. */ zc->zc_obj |= ZPROP_ERR_NORESTORE; } } out: nvlist_free(props); nvlist_free(origprops); nvlist_free(errors); releasef(fd); if (error == 0) error = props_error; return (error); } /* * inputs: * zc_name name of snapshot to send * zc_cookie file descriptor to send stream to * zc_obj fromorigin flag (mutually exclusive with zc_fromobj) * zc_sendobj objsetid of snapshot to send * zc_fromobj objsetid of incremental fromsnap (may be zero) * zc_guid if set, estimate size of stream only. zc_cookie is ignored. * output size in zc_objset_type. * zc_flags lzc_send_flags * * outputs: * zc_objset_type estimated size, if zc_guid is set */ static int zfs_ioc_send(zfs_cmd_t *zc) { int error; offset_t off; boolean_t estimate = (zc->zc_guid != 0); boolean_t embedok = (zc->zc_flags & 0x1); boolean_t large_block_ok = (zc->zc_flags & 0x2); if (zc->zc_obj != 0) { dsl_pool_t *dp; dsl_dataset_t *tosnap; error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } if (dsl_dir_is_clone(tosnap->ds_dir)) zc->zc_fromobj = dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj; dsl_dataset_rele(tosnap, FTAG); dsl_pool_rele(dp, FTAG); } if (estimate) { dsl_pool_t *dp; dsl_dataset_t *tosnap; dsl_dataset_t *fromsnap = NULL; error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } if (zc->zc_fromobj != 0) { error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &fromsnap); if (error != 0) { dsl_dataset_rele(tosnap, FTAG); dsl_pool_rele(dp, FTAG); return (error); } } error = dmu_send_estimate(tosnap, fromsnap, &zc->zc_objset_type); if (fromsnap != NULL) dsl_dataset_rele(fromsnap, FTAG); dsl_dataset_rele(tosnap, FTAG); dsl_pool_rele(dp, FTAG); } else { file_t *fp; cap_rights_t rights; #ifdef illumos fp = getf(zc->zc_cookie); #else fget_write(curthread, zc->zc_cookie, cap_rights_init(&rights, CAP_WRITE), &fp); #endif if (fp == NULL) return (SET_ERROR(EBADF)); off = fp->f_offset; error = dmu_send_obj(zc->zc_name, zc->zc_sendobj, zc->zc_fromobj, embedok, large_block_ok, #ifdef illumos zc->zc_cookie, fp->f_vnode, &off); #else zc->zc_cookie, fp, &off); #endif if (off >= 0 && off <= MAXOFFSET_T) fp->f_offset = off; releasef(zc->zc_cookie); } return (error); } /* * inputs: * zc_name name of snapshot on which to report progress * zc_cookie file descriptor of send stream * * outputs: * zc_cookie number of bytes written in send stream thus far */ static int zfs_ioc_send_progress(zfs_cmd_t *zc) { dsl_pool_t *dp; dsl_dataset_t *ds; dmu_sendarg_t *dsp = NULL; int error; error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } mutex_enter(&ds->ds_sendstream_lock); /* * Iterate over all the send streams currently active on this dataset. * If there's one which matches the specified file descriptor _and_ the * stream was started by the current process, return the progress of * that stream. */ for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL; dsp = list_next(&ds->ds_sendstreams, dsp)) { if (dsp->dsa_outfd == zc->zc_cookie && dsp->dsa_proc == curproc) break; } if (dsp != NULL) zc->zc_cookie = *(dsp->dsa_off); else error = SET_ERROR(ENOENT); mutex_exit(&ds->ds_sendstream_lock); dsl_dataset_rele(ds, FTAG); dsl_pool_rele(dp, FTAG); return (error); } static int zfs_ioc_inject_fault(zfs_cmd_t *zc) { int id, error; error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id, &zc->zc_inject_record); if (error == 0) zc->zc_guid = (uint64_t)id; return (error); } static int zfs_ioc_clear_fault(zfs_cmd_t *zc) { return (zio_clear_fault((int)zc->zc_guid)); } static int zfs_ioc_inject_list_next(zfs_cmd_t *zc) { int id = (int)zc->zc_guid; int error; error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name), &zc->zc_inject_record); zc->zc_guid = id; return (error); } static int zfs_ioc_error_log(zfs_cmd_t *zc) { spa_t *spa; int error; size_t count = (size_t)zc->zc_nvlist_dst_size; if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) return (error); error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst, &count); if (error == 0) zc->zc_nvlist_dst_size = count; else zc->zc_nvlist_dst_size = spa_get_errlog_size(spa); spa_close(spa, FTAG); return (error); } static int zfs_ioc_clear(zfs_cmd_t *zc) { spa_t *spa; vdev_t *vd; int error; /* * On zpool clear we also fix up missing slogs */ mutex_enter(&spa_namespace_lock); spa = spa_lookup(zc->zc_name); if (spa == NULL) { mutex_exit(&spa_namespace_lock); return (SET_ERROR(EIO)); } if (spa_get_log_state(spa) == SPA_LOG_MISSING) { /* we need to let spa_open/spa_load clear the chains */ spa_set_log_state(spa, SPA_LOG_CLEAR); } spa->spa_last_open_failed = 0; mutex_exit(&spa_namespace_lock); if (zc->zc_cookie & ZPOOL_NO_REWIND) { error = spa_open(zc->zc_name, &spa, FTAG); } else { nvlist_t *policy; nvlist_t *config = NULL; if (zc->zc_nvlist_src == 0) return (SET_ERROR(EINVAL)); if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) { error = spa_open_rewind(zc->zc_name, &spa, FTAG, policy, &config); if (config != NULL) { int err; if ((err = put_nvlist(zc, config)) != 0) error = err; nvlist_free(config); } nvlist_free(policy); } } if (error != 0) return (error); spa_vdev_state_enter(spa, SCL_NONE); if (zc->zc_guid == 0) { vd = NULL; } else { vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE); if (vd == NULL) { (void) spa_vdev_state_exit(spa, NULL, ENODEV); spa_close(spa, FTAG); return (SET_ERROR(ENODEV)); } } vdev_clear(spa, vd); (void) spa_vdev_state_exit(spa, NULL, 0); /* * Resume any suspended I/Os. */ if (zio_resume(spa) != 0) error = SET_ERROR(EIO); spa_close(spa, FTAG); return (error); } static int zfs_ioc_pool_reopen(zfs_cmd_t *zc) { spa_t *spa; int error; error = spa_open(zc->zc_name, &spa, FTAG); if (error != 0) return (error); spa_vdev_state_enter(spa, SCL_NONE); /* * If a resilver is already in progress then set the * spa_scrub_reopen flag to B_TRUE so that we don't restart * the scan as a side effect of the reopen. Otherwise, let * vdev_open() decided if a resilver is required. */ spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool); vdev_reopen(spa->spa_root_vdev); spa->spa_scrub_reopen = B_FALSE; (void) spa_vdev_state_exit(spa, NULL, 0); spa_close(spa, FTAG); return (0); } /* * inputs: * zc_name name of filesystem * zc_value name of origin snapshot * * outputs: * zc_string name of conflicting snapshot, if there is one */ static int zfs_ioc_promote(zfs_cmd_t *zc) { char *cp; /* * We don't need to unmount *all* the origin fs's snapshots, but * it's easier. */ cp = strchr(zc->zc_value, '@'); if (cp) *cp = '\0'; (void) dmu_objset_find(zc->zc_value, zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS); return (dsl_dataset_promote(zc->zc_name, zc->zc_string)); } /* * Retrieve a single {user|group}{used|quota}@... property. * * inputs: * zc_name name of filesystem * zc_objset_type zfs_userquota_prop_t * zc_value domain name (eg. "S-1-234-567-89") * zc_guid RID/UID/GID * * outputs: * zc_cookie property value */ static int zfs_ioc_userspace_one(zfs_cmd_t *zc) { zfsvfs_t *zfsvfs; int error; if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS) return (SET_ERROR(EINVAL)); error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); if (error != 0) return (error); error = zfs_userspace_one(zfsvfs, zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie); zfsvfs_rele(zfsvfs, FTAG); return (error); } /* * inputs: * zc_name name of filesystem * zc_cookie zap cursor * zc_objset_type zfs_userquota_prop_t * zc_nvlist_dst[_size] buffer to fill (not really an nvlist) * * outputs: * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t) * zc_cookie zap cursor */ static int zfs_ioc_userspace_many(zfs_cmd_t *zc) { zfsvfs_t *zfsvfs; int bufsize = zc->zc_nvlist_dst_size; if (bufsize <= 0) return (SET_ERROR(ENOMEM)); int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE); if (error != 0) return (error); void *buf = kmem_alloc(bufsize, KM_SLEEP); error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie, buf, &zc->zc_nvlist_dst_size); if (error == 0) { error = ddi_copyout(buf, (void *)(uintptr_t)zc->zc_nvlist_dst, zc->zc_nvlist_dst_size, zc->zc_iflags); } kmem_free(buf, bufsize); zfsvfs_rele(zfsvfs, FTAG); return (error); } /* * inputs: * zc_name name of filesystem * * outputs: * none */ static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc) { objset_t *os; int error = 0; zfsvfs_t *zfsvfs; if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) { if (!dmu_objset_userused_enabled(zfsvfs->z_os)) { /* * If userused is not enabled, it may be because the * objset needs to be closed & reopened (to grow the * objset_phys_t). Suspend/resume the fs will do that. */ error = zfs_suspend_fs(zfsvfs); if (error == 0) { dmu_objset_refresh_ownership(zfsvfs->z_os, zfsvfs); error = zfs_resume_fs(zfsvfs, zc->zc_name); } } if (error == 0) error = dmu_objset_userspace_upgrade(zfsvfs->z_os); +#ifdef illumos VFS_RELE(zfsvfs->z_vfs); +#else + vfs_unbusy(zfsvfs->z_vfs); +#endif } else { /* XXX kind of reading contents without owning */ error = dmu_objset_hold(zc->zc_name, FTAG, &os); if (error != 0) return (error); error = dmu_objset_userspace_upgrade(os); dmu_objset_rele(os, FTAG); } return (error); } #ifdef illumos /* * We don't want to have a hard dependency * against some special symbols in sharefs * nfs, and smbsrv. Determine them if needed when * the first file system is shared. * Neither sharefs, nfs or smbsrv are unloadable modules. */ int (*znfsexport_fs)(void *arg); int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t); int (*zsmbexport_fs)(void *arg, boolean_t add_share); int zfs_nfsshare_inited; int zfs_smbshare_inited; ddi_modhandle_t nfs_mod; ddi_modhandle_t sharefs_mod; ddi_modhandle_t smbsrv_mod; #endif /* illumos */ kmutex_t zfs_share_lock; #ifdef illumos static int zfs_init_sharefs() { int error; ASSERT(MUTEX_HELD(&zfs_share_lock)); /* Both NFS and SMB shares also require sharetab support. */ if (sharefs_mod == NULL && ((sharefs_mod = ddi_modopen("fs/sharefs", KRTLD_MODE_FIRST, &error)) == NULL)) { return (SET_ERROR(ENOSYS)); } if (zshare_fs == NULL && ((zshare_fs = (int (*)(enum sharefs_sys_op, share_t *, uint32_t)) ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) { return (SET_ERROR(ENOSYS)); } return (0); } #endif /* illumos */ static int zfs_ioc_share(zfs_cmd_t *zc) { #ifdef illumos int error; int opcode; switch (zc->zc_share.z_sharetype) { case ZFS_SHARE_NFS: case ZFS_UNSHARE_NFS: if (zfs_nfsshare_inited == 0) { mutex_enter(&zfs_share_lock); if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs", KRTLD_MODE_FIRST, &error)) == NULL)) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } if (znfsexport_fs == NULL && ((znfsexport_fs = (int (*)(void *)) ddi_modsym(nfs_mod, "nfs_export", &error)) == NULL)) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } error = zfs_init_sharefs(); if (error != 0) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } zfs_nfsshare_inited = 1; mutex_exit(&zfs_share_lock); } break; case ZFS_SHARE_SMB: case ZFS_UNSHARE_SMB: if (zfs_smbshare_inited == 0) { mutex_enter(&zfs_share_lock); if (smbsrv_mod == NULL && ((smbsrv_mod = ddi_modopen("drv/smbsrv", KRTLD_MODE_FIRST, &error)) == NULL)) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } if (zsmbexport_fs == NULL && ((zsmbexport_fs = (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod, "smb_server_share", &error)) == NULL)) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } error = zfs_init_sharefs(); if (error != 0) { mutex_exit(&zfs_share_lock); return (SET_ERROR(ENOSYS)); } zfs_smbshare_inited = 1; mutex_exit(&zfs_share_lock); } break; default: return (SET_ERROR(EINVAL)); } switch (zc->zc_share.z_sharetype) { case ZFS_SHARE_NFS: case ZFS_UNSHARE_NFS: if (error = znfsexport_fs((void *) (uintptr_t)zc->zc_share.z_exportdata)) return (error); break; case ZFS_SHARE_SMB: case ZFS_UNSHARE_SMB: if (error = zsmbexport_fs((void *) (uintptr_t)zc->zc_share.z_exportdata, zc->zc_share.z_sharetype == ZFS_SHARE_SMB ? B_TRUE: B_FALSE)) { return (error); } break; } opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS || zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ? SHAREFS_ADD : SHAREFS_REMOVE; /* * Add or remove share from sharetab */ error = zshare_fs(opcode, (void *)(uintptr_t)zc->zc_share.z_sharedata, zc->zc_share.z_sharemax); return (error); #else /* !illumos */ return (ENOSYS); #endif /* illumos */ } ace_t full_access[] = { {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0} }; /* * inputs: * zc_name name of containing filesystem * zc_obj object # beyond which we want next in-use object # * * outputs: * zc_obj next in-use object # */ static int zfs_ioc_next_obj(zfs_cmd_t *zc) { objset_t *os = NULL; int error; error = dmu_objset_hold(zc->zc_name, FTAG, &os); if (error != 0) return (error); error = dmu_object_next(os, &zc->zc_obj, B_FALSE, dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg); dmu_objset_rele(os, FTAG); return (error); } /* * inputs: * zc_name name of filesystem * zc_value prefix name for snapshot * zc_cleanup_fd cleanup-on-exit file descriptor for calling process * * outputs: * zc_value short name of new snapshot */ static int zfs_ioc_tmp_snapshot(zfs_cmd_t *zc) { char *snap_name; char *hold_name; int error; minor_t minor; error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor); if (error != 0) return (error); snap_name = kmem_asprintf("%s-%016llx", zc->zc_value, (u_longlong_t)ddi_get_lbolt64()); hold_name = kmem_asprintf("%%%s", zc->zc_value); error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor, hold_name); if (error == 0) (void) strcpy(zc->zc_value, snap_name); strfree(snap_name); strfree(hold_name); zfs_onexit_fd_rele(zc->zc_cleanup_fd); return (error); } /* * inputs: * zc_name name of "to" snapshot * zc_value name of "from" snapshot * zc_cookie file descriptor to write diff data on * * outputs: * dmu_diff_record_t's to the file descriptor */ static int zfs_ioc_diff(zfs_cmd_t *zc) { file_t *fp; cap_rights_t rights; offset_t off; int error; #ifdef illumos fp = getf(zc->zc_cookie); #else fget_write(curthread, zc->zc_cookie, cap_rights_init(&rights, CAP_WRITE), &fp); #endif if (fp == NULL) return (SET_ERROR(EBADF)); off = fp->f_offset; #ifdef illumos error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off); #else error = dmu_diff(zc->zc_name, zc->zc_value, fp, &off); #endif if (off >= 0 && off <= MAXOFFSET_T) fp->f_offset = off; releasef(zc->zc_cookie); return (error); } #ifdef illumos /* * Remove all ACL files in shares dir */ static int zfs_smb_acl_purge(znode_t *dzp) { zap_cursor_t zc; zap_attribute_t zap; zfsvfs_t *zfsvfs = dzp->z_zfsvfs; int error; for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id); (error = zap_cursor_retrieve(&zc, &zap)) == 0; zap_cursor_advance(&zc)) { if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred, NULL, 0)) != 0) break; } zap_cursor_fini(&zc); return (error); } #endif /* illumos */ static int zfs_ioc_smb_acl(zfs_cmd_t *zc) { #ifdef illumos vnode_t *vp; znode_t *dzp; vnode_t *resourcevp = NULL; znode_t *sharedir; zfsvfs_t *zfsvfs; nvlist_t *nvlist; char *src, *target; vattr_t vattr; vsecattr_t vsec; int error = 0; if ((error = lookupname(zc->zc_value, UIO_SYSSPACE, NO_FOLLOW, NULL, &vp)) != 0) return (error); /* Now make sure mntpnt and dataset are ZFS */ if (strcmp(vp->v_vfsp->mnt_stat.f_fstypename, "zfs") != 0 || (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource), zc->zc_name) != 0)) { VN_RELE(vp); return (SET_ERROR(EINVAL)); } dzp = VTOZ(vp); zfsvfs = dzp->z_zfsvfs; ZFS_ENTER(zfsvfs); /* * Create share dir if its missing. */ mutex_enter(&zfsvfs->z_lock); if (zfsvfs->z_shares_dir == 0) { dmu_tx_t *tx; tx = dmu_tx_create(zfsvfs->z_os); dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE, ZFS_SHARES_DIR); dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); error = dmu_tx_assign(tx, TXG_WAIT); if (error != 0) { dmu_tx_abort(tx); } else { error = zfs_create_share_dir(zfsvfs, tx); dmu_tx_commit(tx); } if (error != 0) { mutex_exit(&zfsvfs->z_lock); VN_RELE(vp); ZFS_EXIT(zfsvfs); return (error); } } mutex_exit(&zfsvfs->z_lock); ASSERT(zfsvfs->z_shares_dir); if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) { VN_RELE(vp); ZFS_EXIT(zfsvfs); return (error); } switch (zc->zc_cookie) { case ZFS_SMB_ACL_ADD: vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; vattr.va_type = VREG; vattr.va_mode = S_IFREG|0777; vattr.va_uid = 0; vattr.va_gid = 0; vsec.vsa_mask = VSA_ACE; vsec.vsa_aclentp = &full_access; vsec.vsa_aclentsz = sizeof (full_access); vsec.vsa_aclcnt = 1; error = VOP_CREATE(ZTOV(sharedir), zc->zc_string, &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec); if (resourcevp) VN_RELE(resourcevp); break; case ZFS_SMB_ACL_REMOVE: error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred, NULL, 0); break; case ZFS_SMB_ACL_RENAME: if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) { VN_RELE(vp); VN_RELE(ZTOV(sharedir)); ZFS_EXIT(zfsvfs); return (error); } if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) || nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET, &target)) { VN_RELE(vp); VN_RELE(ZTOV(sharedir)); ZFS_EXIT(zfsvfs); nvlist_free(nvlist); return (error); } error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target, kcred, NULL, 0); nvlist_free(nvlist); break; case ZFS_SMB_ACL_PURGE: error = zfs_smb_acl_purge(sharedir); break; default: error = SET_ERROR(EINVAL); break; } VN_RELE(vp); VN_RELE(ZTOV(sharedir)); ZFS_EXIT(zfsvfs); return (error); #else /* !illumos */ return (EOPNOTSUPP); #endif /* illumos */ } /* * innvl: { * "holds" -> { snapname -> holdname (string), ... } * (optional) "cleanup_fd" -> fd (int32) * } * * outnvl: { * snapname -> error value (int32) * ... * } */ /* ARGSUSED */ static int zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist) { nvpair_t *pair; nvlist_t *holds; int cleanup_fd = -1; int error; minor_t minor = 0; error = nvlist_lookup_nvlist(args, "holds", &holds); if (error != 0) return (SET_ERROR(EINVAL)); /* make sure the user didn't pass us any invalid (empty) tags */ for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; pair = nvlist_next_nvpair(holds, pair)) { char *htag; error = nvpair_value_string(pair, &htag); if (error != 0) return (SET_ERROR(error)); if (strlen(htag) == 0) return (SET_ERROR(EINVAL)); } if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) { error = zfs_onexit_fd_hold(cleanup_fd, &minor); if (error != 0) return (error); } error = dsl_dataset_user_hold(holds, minor, errlist); if (minor != 0) zfs_onexit_fd_rele(cleanup_fd); return (error); } /* * innvl is not used. * * outnvl: { * holdname -> time added (uint64 seconds since epoch) * ... * } */ /* ARGSUSED */ static int zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl) { return (dsl_dataset_get_holds(snapname, outnvl)); } /* * innvl: { * snapname -> { holdname, ... } * ... * } * * outnvl: { * snapname -> error value (int32) * ... * } */ /* ARGSUSED */ static int zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist) { return (dsl_dataset_user_release(holds, errlist)); } /* * inputs: * zc_name name of new filesystem or snapshot * zc_value full name of old snapshot * * outputs: * zc_cookie space in bytes * zc_objset_type compressed space in bytes * zc_perm_action uncompressed space in bytes */ static int zfs_ioc_space_written(zfs_cmd_t *zc) { int error; dsl_pool_t *dp; dsl_dataset_t *new, *old; error = dsl_pool_hold(zc->zc_name, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old); if (error != 0) { dsl_dataset_rele(new, FTAG); dsl_pool_rele(dp, FTAG); return (error); } error = dsl_dataset_space_written(old, new, &zc->zc_cookie, &zc->zc_objset_type, &zc->zc_perm_action); dsl_dataset_rele(old, FTAG); dsl_dataset_rele(new, FTAG); dsl_pool_rele(dp, FTAG); return (error); } /* * innvl: { * "firstsnap" -> snapshot name * } * * outnvl: { * "used" -> space in bytes * "compressed" -> compressed space in bytes * "uncompressed" -> uncompressed space in bytes * } */ static int zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl) { int error; dsl_pool_t *dp; dsl_dataset_t *new, *old; char *firstsnap; uint64_t used, comp, uncomp; if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0) return (SET_ERROR(EINVAL)); error = dsl_pool_hold(lastsnap, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, lastsnap, FTAG, &new); if (error == 0 && !new->ds_is_snapshot) { dsl_dataset_rele(new, FTAG); error = SET_ERROR(EINVAL); } if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } error = dsl_dataset_hold(dp, firstsnap, FTAG, &old); if (error == 0 && !old->ds_is_snapshot) { dsl_dataset_rele(old, FTAG); error = SET_ERROR(EINVAL); } if (error != 0) { dsl_dataset_rele(new, FTAG); dsl_pool_rele(dp, FTAG); return (error); } error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp); dsl_dataset_rele(old, FTAG); dsl_dataset_rele(new, FTAG); dsl_pool_rele(dp, FTAG); fnvlist_add_uint64(outnvl, "used", used); fnvlist_add_uint64(outnvl, "compressed", comp); fnvlist_add_uint64(outnvl, "uncompressed", uncomp); return (error); } static int zfs_ioc_jail(zfs_cmd_t *zc) { return (zone_dataset_attach(curthread->td_ucred, zc->zc_name, (int)zc->zc_jailid)); } static int zfs_ioc_unjail(zfs_cmd_t *zc) { return (zone_dataset_detach(curthread->td_ucred, zc->zc_name, (int)zc->zc_jailid)); } /* * innvl: { * "fd" -> file descriptor to write stream to (int32) * (optional) "fromsnap" -> full snap name to send an incremental from * (optional) "largeblockok" -> (value ignored) * indicates that blocks > 128KB are permitted * (optional) "embedok" -> (value ignored) * presence indicates DRR_WRITE_EMBEDDED records are permitted * (optional) "resume_object" and "resume_offset" -> (uint64) * if present, resume send stream from specified object and offset. * } * * outnvl is unused */ /* ARGSUSED */ static int zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) { cap_rights_t rights; file_t *fp; int error; offset_t off; char *fromname = NULL; int fd; boolean_t largeblockok; boolean_t embedok; uint64_t resumeobj = 0; uint64_t resumeoff = 0; error = nvlist_lookup_int32(innvl, "fd", &fd); if (error != 0) return (SET_ERROR(EINVAL)); (void) nvlist_lookup_string(innvl, "fromsnap", &fromname); largeblockok = nvlist_exists(innvl, "largeblockok"); embedok = nvlist_exists(innvl, "embedok"); (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj); (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff); #ifdef illumos file_t *fp = getf(fd); #else fget_write(curthread, fd, cap_rights_init(&rights, CAP_WRITE), &fp); #endif if (fp == NULL) return (SET_ERROR(EBADF)); off = fp->f_offset; error = dmu_send(snapname, fromname, embedok, largeblockok, fd, #ifdef illumos resumeobj, resumeoff, fp->f_vnode, &off); #else resumeobj, resumeoff, fp, &off); #endif #ifdef illumos if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0) fp->f_offset = off; #else fp->f_offset = off; #endif releasef(fd); return (error); } /* * Determine approximately how large a zfs send stream will be -- the number * of bytes that will be written to the fd supplied to zfs_ioc_send_new(). * * innvl: { * (optional) "from" -> full snap or bookmark name to send an incremental * from * } * * outnvl: { * "space" -> bytes of space (uint64) * } */ static int zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl) { dsl_pool_t *dp; dsl_dataset_t *tosnap; int error; char *fromname; uint64_t space; error = dsl_pool_hold(snapname, FTAG, &dp); if (error != 0) return (error); error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap); if (error != 0) { dsl_pool_rele(dp, FTAG); return (error); } error = nvlist_lookup_string(innvl, "from", &fromname); if (error == 0) { if (strchr(fromname, '@') != NULL) { /* * If from is a snapshot, hold it and use the more * efficient dmu_send_estimate to estimate send space * size using deadlists. */ dsl_dataset_t *fromsnap; error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap); if (error != 0) goto out; error = dmu_send_estimate(tosnap, fromsnap, &space); dsl_dataset_rele(fromsnap, FTAG); } else if (strchr(fromname, '#') != NULL) { /* * If from is a bookmark, fetch the creation TXG of the * snapshot it was created from and use that to find * blocks that were born after it. */ zfs_bookmark_phys_t frombm; error = dsl_bookmark_lookup(dp, fromname, tosnap, &frombm); if (error != 0) goto out; error = dmu_send_estimate_from_txg(tosnap, frombm.zbm_creation_txg, &space); } else { /* * from is not properly formatted as a snapshot or * bookmark */ error = SET_ERROR(EINVAL); goto out; } } else { // If estimating the size of a full send, use dmu_send_estimate error = dmu_send_estimate(tosnap, NULL, &space); } fnvlist_add_uint64(outnvl, "space", space); out: dsl_dataset_rele(tosnap, FTAG); dsl_pool_rele(dp, FTAG); return (error); } static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST]; static void zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, boolean_t log_history, zfs_ioc_poolcheck_t pool_check) { zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; ASSERT3U(ioc, >=, ZFS_IOC_FIRST); ASSERT3U(ioc, <, ZFS_IOC_LAST); ASSERT3P(vec->zvec_legacy_func, ==, NULL); ASSERT3P(vec->zvec_func, ==, NULL); vec->zvec_legacy_func = func; vec->zvec_secpolicy = secpolicy; vec->zvec_namecheck = namecheck; vec->zvec_allow_log = log_history; vec->zvec_pool_check = pool_check; } /* * See the block comment at the beginning of this file for details on * each argument to this function. */ static void zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func, zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck, zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist, boolean_t allow_log) { zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST]; ASSERT3U(ioc, >=, ZFS_IOC_FIRST); ASSERT3U(ioc, <, ZFS_IOC_LAST); ASSERT3P(vec->zvec_legacy_func, ==, NULL); ASSERT3P(vec->zvec_func, ==, NULL); /* if we are logging, the name must be valid */ ASSERT(!allow_log || namecheck != NO_NAME); vec->zvec_name = name; vec->zvec_func = func; vec->zvec_secpolicy = secpolicy; vec->zvec_namecheck = namecheck; vec->zvec_pool_check = pool_check; vec->zvec_smush_outnvlist = smush_outnvlist; vec->zvec_allow_log = allow_log; } static void zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy, boolean_t log_history, zfs_ioc_poolcheck_t pool_check) { zfs_ioctl_register_legacy(ioc, func, secpolicy, POOL_NAME, log_history, pool_check); } static void zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check) { zfs_ioctl_register_legacy(ioc, func, secpolicy, DATASET_NAME, B_FALSE, pool_check); } static void zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) { zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config, POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); } static void zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) { zfs_ioctl_register_legacy(ioc, func, secpolicy, NO_NAME, B_FALSE, POOL_CHECK_NONE); } static void zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) { zfs_ioctl_register_legacy(ioc, func, secpolicy, DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED); } static void zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func) { zfs_ioctl_register_dataset_read_secpolicy(ioc, func, zfs_secpolicy_read); } static void zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy) { zfs_ioctl_register_legacy(ioc, func, secpolicy, DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); } static void zfs_ioctl_init(void) { zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT, zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY, zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE); zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS, zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); zfs_ioctl_register("send", ZFS_IOC_SEND_NEW, zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME, POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE, zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME, POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); zfs_ioctl_register("create", ZFS_IOC_CREATE, zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("clone", ZFS_IOC_CLONE, zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS, zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("hold", ZFS_IOC_HOLD, zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("release", ZFS_IOC_RELEASE, zfs_ioc_release, zfs_secpolicy_release, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS, zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK, zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE); zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK, zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS, zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME, POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE); zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS, zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks, POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE); /* IOCTLS that use the legacy function signature */ zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY); zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create, zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN, zfs_ioc_pool_scan); zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE, zfs_ioc_pool_upgrade); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD, zfs_ioc_vdev_add); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE, zfs_ioc_vdev_remove); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE, zfs_ioc_vdev_set_state); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH, zfs_ioc_vdev_attach); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH, zfs_ioc_vdev_detach); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH, zfs_ioc_vdev_setpath); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU, zfs_ioc_vdev_setfru); zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS, zfs_ioc_pool_set_props); zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT, zfs_ioc_vdev_split); zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID, zfs_ioc_pool_reguid); zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS, zfs_ioc_pool_configs, zfs_secpolicy_none); zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT, zfs_ioc_pool_tryimport, zfs_secpolicy_config); zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT, zfs_ioc_inject_fault, zfs_secpolicy_inject); zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT, zfs_ioc_clear_fault, zfs_secpolicy_inject); zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT, zfs_ioc_inject_list_next, zfs_secpolicy_inject); /* * pool destroy, and export don't log the history as part of * zfsdev_ioctl, but rather zfs_ioc_pool_export * does the logging of those commands. */ zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy, zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export, zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats, zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props, zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log, zfs_secpolicy_inject, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME, zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, B_FALSE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY, zfs_ioc_pool_get_history, zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED); zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import, zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear, zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE); zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen, zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED); zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN, zfs_ioc_space_written); zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS, zfs_ioc_objset_recvd_props); zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ, zfs_ioc_next_obj); zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL, zfs_ioc_get_fsacl); zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS, zfs_ioc_objset_stats); zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS, zfs_ioc_objset_zplprops); zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT, zfs_ioc_dataset_list_next); zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT, zfs_ioc_snapshot_list_next); zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS, zfs_ioc_send_progress); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF, zfs_ioc_diff, zfs_secpolicy_diff); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS, zfs_ioc_obj_to_stats, zfs_secpolicy_diff); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH, zfs_ioc_obj_to_path, zfs_secpolicy_diff); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE, zfs_ioc_userspace_one, zfs_secpolicy_userspace_one); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY, zfs_ioc_userspace_many, zfs_secpolicy_userspace_many); zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND, zfs_ioc_send, zfs_secpolicy_send); zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop, zfs_secpolicy_none); zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy, zfs_secpolicy_destroy); zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename, zfs_secpolicy_rename); zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv, zfs_secpolicy_recv); zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote, zfs_secpolicy_promote); zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP, zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop); zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl, zfs_secpolicy_set_fsacl); zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share, zfs_secpolicy_share, POOL_CHECK_NONE); zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, POOL_CHECK_NONE); zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE, zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT, zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY); #ifdef __FreeBSD__ zfs_ioctl_register_dataset_nolog(ZFS_IOC_JAIL, zfs_ioc_jail, zfs_secpolicy_config, POOL_CHECK_NONE); zfs_ioctl_register_dataset_nolog(ZFS_IOC_UNJAIL, zfs_ioc_unjail, zfs_secpolicy_config, POOL_CHECK_NONE); #endif } int pool_status_check(const char *name, zfs_ioc_namecheck_t type, zfs_ioc_poolcheck_t check) { spa_t *spa; int error; ASSERT(type == POOL_NAME || type == DATASET_NAME); if (check & POOL_CHECK_NONE) return (0); error = spa_open(name, &spa, FTAG); if (error == 0) { if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa)) error = SET_ERROR(EAGAIN); else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa)) error = SET_ERROR(EROFS); spa_close(spa, FTAG); } return (error); } /* * Find a free minor number. */ minor_t zfsdev_minor_alloc(void) { static minor_t last_minor; minor_t m; ASSERT(MUTEX_HELD(&spa_namespace_lock)); for (m = last_minor + 1; m != last_minor; m++) { if (m > ZFSDEV_MAX_MINOR) m = 1; if (ddi_get_soft_state(zfsdev_state, m) == NULL) { last_minor = m; return (m); } } return (0); } static int zfs_ctldev_init(struct cdev *devp) { minor_t minor; zfs_soft_state_t *zs; ASSERT(MUTEX_HELD(&spa_namespace_lock)); minor = zfsdev_minor_alloc(); if (minor == 0) return (SET_ERROR(ENXIO)); if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS) return (SET_ERROR(EAGAIN)); devfs_set_cdevpriv((void *)(uintptr_t)minor, zfsdev_close); zs = ddi_get_soft_state(zfsdev_state, minor); zs->zss_type = ZSST_CTLDEV; zfs_onexit_init((zfs_onexit_t **)&zs->zss_data); return (0); } static void zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor) { ASSERT(MUTEX_HELD(&spa_namespace_lock)); zfs_onexit_destroy(zo); ddi_soft_state_free(zfsdev_state, minor); } void * zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which) { zfs_soft_state_t *zp; zp = ddi_get_soft_state(zfsdev_state, minor); if (zp == NULL || zp->zss_type != which) return (NULL); return (zp->zss_data); } static int zfsdev_open(struct cdev *devp, int flag, int mode, struct thread *td) { int error = 0; #ifdef illumos if (getminor(*devp) != 0) return (zvol_open(devp, flag, otyp, cr)); #endif /* This is the control device. Allocate a new minor if requested. */ if (flag & FEXCL) { mutex_enter(&spa_namespace_lock); error = zfs_ctldev_init(devp); mutex_exit(&spa_namespace_lock); } return (error); } static void zfsdev_close(void *data) { zfs_onexit_t *zo; minor_t minor = (minor_t)(uintptr_t)data; if (minor == 0) return; mutex_enter(&spa_namespace_lock); zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV); if (zo == NULL) { mutex_exit(&spa_namespace_lock); return; } zfs_ctldev_destroy(zo, minor); mutex_exit(&spa_namespace_lock); } static int zfsdev_ioctl(struct cdev *dev, u_long zcmd, caddr_t arg, int flag, struct thread *td) { zfs_cmd_t *zc; uint_t vecnum; int error, rc, len; #ifdef illumos minor_t minor = getminor(dev); #else zfs_iocparm_t *zc_iocparm; int cflag, cmd, oldvecnum; boolean_t newioc, compat; void *compat_zc = NULL; cred_t *cr = td->td_ucred; #endif const zfs_ioc_vec_t *vec; char *saved_poolname = NULL; nvlist_t *innvl = NULL; cflag = ZFS_CMD_COMPAT_NONE; compat = B_FALSE; newioc = B_TRUE; /* "new" style (zfs_iocparm_t) ioctl */ len = IOCPARM_LEN(zcmd); vecnum = cmd = zcmd & 0xff; /* * Check if we are talking to supported older binaries * and translate zfs_cmd if necessary */ if (len != sizeof(zfs_iocparm_t)) { newioc = B_FALSE; compat = B_TRUE; vecnum = cmd; switch (len) { case sizeof(zfs_cmd_zcmd_t): cflag = ZFS_CMD_COMPAT_LZC; break; case sizeof(zfs_cmd_deadman_t): cflag = ZFS_CMD_COMPAT_DEADMAN; break; case sizeof(zfs_cmd_v28_t): cflag = ZFS_CMD_COMPAT_V28; break; case sizeof(zfs_cmd_v15_t): cflag = ZFS_CMD_COMPAT_V15; vecnum = zfs_ioctl_v15_to_v28[cmd]; /* * Return without further handling * if the command is blacklisted. */ if (vecnum == ZFS_IOC_COMPAT_PASS) return (0); else if (vecnum == ZFS_IOC_COMPAT_FAIL) return (ENOTSUP); break; default: return (EINVAL); } } #ifdef illumos vecnum = cmd - ZFS_IOC_FIRST; ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip)); #endif if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0])) return (SET_ERROR(EINVAL)); vec = &zfs_ioc_vec[vecnum]; zc = kmem_zalloc(sizeof(zfs_cmd_t), KM_SLEEP); #ifdef illumos error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag); if (error != 0) { error = SET_ERROR(EFAULT); goto out; } #else /* !illumos */ bzero(zc, sizeof(zfs_cmd_t)); if (newioc) { zc_iocparm = (void *)arg; switch (zc_iocparm->zfs_ioctl_version) { case ZFS_IOCVER_CURRENT: if (zc_iocparm->zfs_cmd_size != sizeof(zfs_cmd_t)) { error = SET_ERROR(EINVAL); goto out; } break; case ZFS_IOCVER_RESUME: if (zc_iocparm->zfs_cmd_size != sizeof(zfs_cmd_resume_t)) { error = SET_ERROR(EFAULT); goto out; } compat = B_TRUE; cflag = ZFS_CMD_COMPAT_RESUME; break; case ZFS_IOCVER_EDBP: if (zc_iocparm->zfs_cmd_size != sizeof(zfs_cmd_edbp_t)) { error = SET_ERROR(EFAULT); goto out; } compat = B_TRUE; cflag = ZFS_CMD_COMPAT_EDBP; break; case ZFS_IOCVER_ZCMD: if (zc_iocparm->zfs_cmd_size > sizeof(zfs_cmd_t) || zc_iocparm->zfs_cmd_size < sizeof(zfs_cmd_zcmd_t)) { error = SET_ERROR(EFAULT); goto out; } compat = B_TRUE; cflag = ZFS_CMD_COMPAT_ZCMD; break; default: error = SET_ERROR(EINVAL); goto out; /* NOTREACHED */ } if (compat) { ASSERT(sizeof(zfs_cmd_t) >= zc_iocparm->zfs_cmd_size); compat_zc = kmem_zalloc(sizeof(zfs_cmd_t), KM_SLEEP); bzero(compat_zc, sizeof(zfs_cmd_t)); error = ddi_copyin((void *)(uintptr_t)zc_iocparm->zfs_cmd, compat_zc, zc_iocparm->zfs_cmd_size, flag); if (error != 0) { error = SET_ERROR(EFAULT); goto out; } } else { error = ddi_copyin((void *)(uintptr_t)zc_iocparm->zfs_cmd, zc, zc_iocparm->zfs_cmd_size, flag); if (error != 0) { error = SET_ERROR(EFAULT); goto out; } } } if (compat) { if (newioc) { ASSERT(compat_zc != NULL); zfs_cmd_compat_get(zc, compat_zc, cflag); } else { ASSERT(compat_zc == NULL); zfs_cmd_compat_get(zc, arg, cflag); } oldvecnum = vecnum; error = zfs_ioctl_compat_pre(zc, &vecnum, cflag); if (error != 0) goto out; if (oldvecnum != vecnum) vec = &zfs_ioc_vec[vecnum]; } #endif /* !illumos */ zc->zc_iflags = flag & FKIOCTL; if (zc->zc_nvlist_src_size != 0) { error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, zc->zc_iflags, &innvl); if (error != 0) goto out; } /* rewrite innvl for backwards compatibility */ if (compat) innvl = zfs_ioctl_compat_innvl(zc, innvl, vecnum, cflag); /* * Ensure that all pool/dataset names are valid before we pass down to * the lower layers. */ zc->zc_name[sizeof (zc->zc_name) - 1] = '\0'; switch (vec->zvec_namecheck) { case POOL_NAME: if (pool_namecheck(zc->zc_name, NULL, NULL) != 0) error = SET_ERROR(EINVAL); else error = pool_status_check(zc->zc_name, vec->zvec_namecheck, vec->zvec_pool_check); break; case DATASET_NAME: if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0) error = SET_ERROR(EINVAL); else error = pool_status_check(zc->zc_name, vec->zvec_namecheck, vec->zvec_pool_check); break; case NO_NAME: break; } if (error == 0 && !(flag & FKIOCTL)) error = vec->zvec_secpolicy(zc, innvl, cr); if (error != 0) goto out; /* legacy ioctls can modify zc_name */ len = strcspn(zc->zc_name, "/@#") + 1; saved_poolname = kmem_alloc(len, KM_SLEEP); (void) strlcpy(saved_poolname, zc->zc_name, len); if (vec->zvec_func != NULL) { nvlist_t *outnvl; int puterror = 0; spa_t *spa; nvlist_t *lognv = NULL; ASSERT(vec->zvec_legacy_func == NULL); /* * Add the innvl to the lognv before calling the func, * in case the func changes the innvl. */ if (vec->zvec_allow_log) { lognv = fnvlist_alloc(); fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL, vec->zvec_name); if (!nvlist_empty(innvl)) { fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL, innvl); } } outnvl = fnvlist_alloc(); error = vec->zvec_func(zc->zc_name, innvl, outnvl); if (error == 0 && vec->zvec_allow_log && spa_open(zc->zc_name, &spa, FTAG) == 0) { if (!nvlist_empty(outnvl)) { fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL, outnvl); } (void) spa_history_log_nvl(spa, lognv); spa_close(spa, FTAG); } fnvlist_free(lognv); /* rewrite outnvl for backwards compatibility */ if (compat) outnvl = zfs_ioctl_compat_outnvl(zc, outnvl, vecnum, cflag); if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) { int smusherror = 0; if (vec->zvec_smush_outnvlist) { smusherror = nvlist_smush(outnvl, zc->zc_nvlist_dst_size); } if (smusherror == 0) puterror = put_nvlist(zc, outnvl); } if (puterror != 0) error = puterror; nvlist_free(outnvl); } else { error = vec->zvec_legacy_func(zc); } out: nvlist_free(innvl); #ifdef illumos rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag); if (error == 0 && rc != 0) error = SET_ERROR(EFAULT); #else if (compat) { zfs_ioctl_compat_post(zc, cmd, cflag); if (newioc) { ASSERT(compat_zc != NULL); ASSERT(sizeof(zfs_cmd_t) >= zc_iocparm->zfs_cmd_size); zfs_cmd_compat_put(zc, compat_zc, vecnum, cflag); rc = ddi_copyout(compat_zc, (void *)(uintptr_t)zc_iocparm->zfs_cmd, zc_iocparm->zfs_cmd_size, flag); if (error == 0 && rc != 0) error = SET_ERROR(EFAULT); kmem_free(compat_zc, sizeof (zfs_cmd_t)); } else { zfs_cmd_compat_put(zc, arg, vecnum, cflag); } } else { ASSERT(newioc); rc = ddi_copyout(zc, (void *)(uintptr_t)zc_iocparm->zfs_cmd, sizeof (zfs_cmd_t), flag); if (error == 0 && rc != 0) error = SET_ERROR(EFAULT); } #endif if (error == 0 && vec->zvec_allow_log) { char *s = tsd_get(zfs_allow_log_key); if (s != NULL) strfree(s); (void) tsd_set(zfs_allow_log_key, saved_poolname); } else { if (saved_poolname != NULL) strfree(saved_poolname); } kmem_free(zc, sizeof (zfs_cmd_t)); return (error); } #ifdef illumos static int zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { if (cmd != DDI_ATTACH) return (DDI_FAILURE); if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0, DDI_PSEUDO, 0) == DDI_FAILURE) return (DDI_FAILURE); zfs_dip = dip; ddi_report_dev(dip); return (DDI_SUCCESS); } static int zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { if (spa_busy() || zfs_busy() || zvol_busy()) return (DDI_FAILURE); if (cmd != DDI_DETACH) return (DDI_FAILURE); zfs_dip = NULL; ddi_prop_remove_all(dip); ddi_remove_minor_node(dip, NULL); return (DDI_SUCCESS); } /*ARGSUSED*/ static int zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) { switch (infocmd) { case DDI_INFO_DEVT2DEVINFO: *result = zfs_dip; return (DDI_SUCCESS); case DDI_INFO_DEVT2INSTANCE: *result = (void *)0; return (DDI_SUCCESS); } return (DDI_FAILURE); } #endif /* illumos */ /* * OK, so this is a little weird. * * /dev/zfs is the control node, i.e. minor 0. * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0. * * /dev/zfs has basically nothing to do except serve up ioctls, * so most of the standard driver entry points are in zvol.c. */ #ifdef illumos static struct cb_ops zfs_cb_ops = { zfsdev_open, /* open */ zfsdev_close, /* close */ zvol_strategy, /* strategy */ nodev, /* print */ zvol_dump, /* dump */ zvol_read, /* read */ zvol_write, /* write */ zfsdev_ioctl, /* ioctl */ nodev, /* devmap */ nodev, /* mmap */ nodev, /* segmap */ nochpoll, /* poll */ ddi_prop_op, /* prop_op */ NULL, /* streamtab */ D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */ CB_REV, /* version */ nodev, /* async read */ nodev, /* async write */ }; static struct dev_ops zfs_dev_ops = { DEVO_REV, /* version */ 0, /* refcnt */ zfs_info, /* info */ nulldev, /* identify */ nulldev, /* probe */ zfs_attach, /* attach */ zfs_detach, /* detach */ nodev, /* reset */ &zfs_cb_ops, /* driver operations */ NULL, /* no bus operations */ NULL, /* power */ ddi_quiesce_not_needed, /* quiesce */ }; static struct modldrv zfs_modldrv = { &mod_driverops, "ZFS storage pool", &zfs_dev_ops }; static struct modlinkage modlinkage = { MODREV_1, (void *)&zfs_modlfs, (void *)&zfs_modldrv, NULL }; #endif /* illumos */ static struct cdevsw zfs_cdevsw = { .d_version = D_VERSION, .d_open = zfsdev_open, .d_ioctl = zfsdev_ioctl, .d_name = ZFS_DEV_NAME }; static void zfs_allow_log_destroy(void *arg) { char *poolname = arg; strfree(poolname); } static void zfsdev_init(void) { zfsdev = make_dev(&zfs_cdevsw, 0x0, UID_ROOT, GID_OPERATOR, 0666, ZFS_DEV_NAME); } static void zfsdev_fini(void) { if (zfsdev != NULL) destroy_dev(zfsdev); } static struct root_hold_token *zfs_root_token; struct proc *zfsproc; #ifdef illumos int _init(void) { int error; spa_init(FREAD | FWRITE); zfs_init(); zvol_init(); zfs_ioctl_init(); if ((error = mod_install(&modlinkage)) != 0) { zvol_fini(); zfs_fini(); spa_fini(); return (error); } tsd_create(&zfs_fsyncer_key, NULL); tsd_create(&rrw_tsd_key, rrw_tsd_destroy); tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); error = ldi_ident_from_mod(&modlinkage, &zfs_li); ASSERT(error == 0); mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); return (0); } int _fini(void) { int error; if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) return (SET_ERROR(EBUSY)); if ((error = mod_remove(&modlinkage)) != 0) return (error); zvol_fini(); zfs_fini(); spa_fini(); if (zfs_nfsshare_inited) (void) ddi_modclose(nfs_mod); if (zfs_smbshare_inited) (void) ddi_modclose(smbsrv_mod); if (zfs_nfsshare_inited || zfs_smbshare_inited) (void) ddi_modclose(sharefs_mod); tsd_destroy(&zfs_fsyncer_key); ldi_ident_release(zfs_li); zfs_li = NULL; mutex_destroy(&zfs_share_lock); return (error); } int _info(struct modinfo *modinfop) { return (mod_info(&modlinkage, modinfop)); } #endif /* illumos */ static int zfs__init(void); static int zfs__fini(void); static void zfs_shutdown(void *, int); static eventhandler_tag zfs_shutdown_event_tag; #ifdef __FreeBSD__ #define ZFS_MIN_KSTACK_PAGES 4 #endif int zfs__init(void) { #ifdef __FreeBSD__ #if KSTACK_PAGES < ZFS_MIN_KSTACK_PAGES printf("ZFS NOTICE: KSTACK_PAGES is %d which could result in stack " "overflow panic!\nPlease consider adding " "'options KSTACK_PAGES=%d' to your kernel config\n", KSTACK_PAGES, ZFS_MIN_KSTACK_PAGES); #endif #endif zfs_root_token = root_mount_hold("ZFS"); mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL); spa_init(FREAD | FWRITE); zfs_init(); zvol_init(); zfs_ioctl_init(); tsd_create(&zfs_fsyncer_key, NULL); tsd_create(&rrw_tsd_key, rrw_tsd_destroy); tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy); tsd_create(&zfs_geom_probe_vdev_key, NULL); printf("ZFS storage pool version: features support (" SPA_VERSION_STRING ")\n"); root_mount_rel(zfs_root_token); zfsdev_init(); return (0); } int zfs__fini(void) { if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled) { return (EBUSY); } zfsdev_fini(); zvol_fini(); zfs_fini(); spa_fini(); tsd_destroy(&zfs_fsyncer_key); tsd_destroy(&rrw_tsd_key); tsd_destroy(&zfs_allow_log_key); mutex_destroy(&zfs_share_lock); return (0); } static void zfs_shutdown(void *arg __unused, int howto __unused) { /* * ZFS fini routines can not properly work in a panic-ed system. */ if (panicstr == NULL) (void)zfs__fini(); } static int zfs_modevent(module_t mod, int type, void *unused __unused) { int err; switch (type) { case MOD_LOAD: err = zfs__init(); if (err == 0) zfs_shutdown_event_tag = EVENTHANDLER_REGISTER( shutdown_post_sync, zfs_shutdown, NULL, SHUTDOWN_PRI_FIRST); return (err); case MOD_UNLOAD: err = zfs__fini(); if (err == 0 && zfs_shutdown_event_tag != NULL) EVENTHANDLER_DEREGISTER(shutdown_post_sync, zfs_shutdown_event_tag); return (err); case MOD_SHUTDOWN: return (0); default: break; } return (EOPNOTSUPP); } static moduledata_t zfs_mod = { "zfsctrl", zfs_modevent, 0 }; DECLARE_MODULE(zfsctrl, zfs_mod, SI_SUB_VFS, SI_ORDER_ANY); MODULE_VERSION(zfsctrl, 1); MODULE_DEPEND(zfsctrl, opensolaris, 1, 1, 1); MODULE_DEPEND(zfsctrl, krpc, 1, 1, 1); MODULE_DEPEND(zfsctrl, acl_nfs4, 1, 1, 1); Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c =================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c (revision 297512) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c (revision 297513) @@ -1,2199 +1,2203 @@ /* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2014 by Delphix. All rights reserved. * Copyright (c) 2014 Integros [integros.com] */ /* Portions Copyright 2007 Jeremy Teo */ /* Portions Copyright 2011 Martin Matuska */ #ifdef _KERNEL #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #endif /* _KERNEL */ #include #include #include #include #include #include #include #include #include #include #include "zfs_prop.h" #include "zfs_comutil.h" /* Used by fstat(1). */ SYSCTL_INT(_debug_sizeof, OID_AUTO, znode, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(znode_t), "sizeof(znode_t)"); /* * Define ZNODE_STATS to turn on statistic gathering. By default, it is only * turned on when DEBUG is also defined. */ #ifdef DEBUG #define ZNODE_STATS #endif /* DEBUG */ #ifdef ZNODE_STATS #define ZNODE_STAT_ADD(stat) ((stat)++) #else #define ZNODE_STAT_ADD(stat) /* nothing */ #endif /* ZNODE_STATS */ /* * Functions needed for userland (ie: libzpool) are not put under * #ifdef_KERNEL; the rest of the functions have dependencies * (such as VFS logic) that will not compile easily in userland. */ #ifdef _KERNEL /* * Needed to close a small window in zfs_znode_move() that allows the zfsvfs to * be freed before it can be safely accessed. */ krwlock_t zfsvfs_lock; static kmem_cache_t *znode_cache = NULL; /*ARGSUSED*/ static void znode_evict_error(dmu_buf_t *dbuf, void *user_ptr) { /* * We should never drop all dbuf refs without first clearing * the eviction callback. */ panic("evicting znode %p\n", user_ptr); } extern struct vop_vector zfs_vnodeops; extern struct vop_vector zfs_fifoops; extern struct vop_vector zfs_shareops; static int zfs_znode_cache_constructor(void *buf, void *arg, int kmflags) { znode_t *zp = buf; POINTER_INVALIDATE(&zp->z_zfsvfs); list_link_init(&zp->z_link_node); mutex_init(&zp->z_lock, NULL, MUTEX_DEFAULT, NULL); rw_init(&zp->z_parent_lock, NULL, RW_DEFAULT, NULL); rw_init(&zp->z_name_lock, NULL, RW_DEFAULT, NULL); mutex_init(&zp->z_acl_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&zp->z_range_lock, NULL, MUTEX_DEFAULT, NULL); avl_create(&zp->z_range_avl, zfs_range_compare, sizeof (rl_t), offsetof(rl_t, r_node)); zp->z_dirlocks = NULL; zp->z_acl_cached = NULL; zp->z_vnode = NULL; zp->z_moved = 0; return (0); } /*ARGSUSED*/ static void zfs_znode_cache_destructor(void *buf, void *arg) { znode_t *zp = buf; ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); ASSERT(ZTOV(zp) == NULL); vn_free(ZTOV(zp)); ASSERT(!list_link_active(&zp->z_link_node)); mutex_destroy(&zp->z_lock); rw_destroy(&zp->z_parent_lock); rw_destroy(&zp->z_name_lock); mutex_destroy(&zp->z_acl_lock); avl_destroy(&zp->z_range_avl); mutex_destroy(&zp->z_range_lock); ASSERT(zp->z_dirlocks == NULL); ASSERT(zp->z_acl_cached == NULL); } #ifdef ZNODE_STATS static struct { uint64_t zms_zfsvfs_invalid; uint64_t zms_zfsvfs_recheck1; uint64_t zms_zfsvfs_unmounted; uint64_t zms_zfsvfs_recheck2; uint64_t zms_obj_held; uint64_t zms_vnode_locked; uint64_t zms_not_only_dnlc; } znode_move_stats; #endif /* ZNODE_STATS */ #ifdef illumos static void zfs_znode_move_impl(znode_t *ozp, znode_t *nzp) { vnode_t *vp; /* Copy fields. */ nzp->z_zfsvfs = ozp->z_zfsvfs; /* Swap vnodes. */ vp = nzp->z_vnode; nzp->z_vnode = ozp->z_vnode; ozp->z_vnode = vp; /* let destructor free the overwritten vnode */ ZTOV(ozp)->v_data = ozp; ZTOV(nzp)->v_data = nzp; nzp->z_id = ozp->z_id; ASSERT(ozp->z_dirlocks == NULL); /* znode not in use */ ASSERT(avl_numnodes(&ozp->z_range_avl) == 0); nzp->z_unlinked = ozp->z_unlinked; nzp->z_atime_dirty = ozp->z_atime_dirty; nzp->z_zn_prefetch = ozp->z_zn_prefetch; nzp->z_blksz = ozp->z_blksz; nzp->z_seq = ozp->z_seq; nzp->z_mapcnt = ozp->z_mapcnt; nzp->z_gen = ozp->z_gen; nzp->z_sync_cnt = ozp->z_sync_cnt; nzp->z_is_sa = ozp->z_is_sa; nzp->z_sa_hdl = ozp->z_sa_hdl; bcopy(ozp->z_atime, nzp->z_atime, sizeof (uint64_t) * 2); nzp->z_links = ozp->z_links; nzp->z_size = ozp->z_size; nzp->z_pflags = ozp->z_pflags; nzp->z_uid = ozp->z_uid; nzp->z_gid = ozp->z_gid; nzp->z_mode = ozp->z_mode; /* * Since this is just an idle znode and kmem is already dealing with * memory pressure, release any cached ACL. */ if (ozp->z_acl_cached) { zfs_acl_free(ozp->z_acl_cached); ozp->z_acl_cached = NULL; } sa_set_userp(nzp->z_sa_hdl, nzp); /* * Invalidate the original znode by clearing fields that provide a * pointer back to the znode. Set the low bit of the vfs pointer to * ensure that zfs_znode_move() recognizes the znode as invalid in any * subsequent callback. */ ozp->z_sa_hdl = NULL; POINTER_INVALIDATE(&ozp->z_zfsvfs); /* * Mark the znode. */ nzp->z_moved = 1; ozp->z_moved = (uint8_t)-1; } /*ARGSUSED*/ static kmem_cbrc_t zfs_znode_move(void *buf, void *newbuf, size_t size, void *arg) { znode_t *ozp = buf, *nzp = newbuf; zfsvfs_t *zfsvfs; vnode_t *vp; /* * The znode is on the file system's list of known znodes if the vfs * pointer is valid. We set the low bit of the vfs pointer when freeing * the znode to invalidate it, and the memory patterns written by kmem * (baddcafe and deadbeef) set at least one of the two low bits. A newly * created znode sets the vfs pointer last of all to indicate that the * znode is known and in a valid state to be moved by this function. */ zfsvfs = ozp->z_zfsvfs; if (!POINTER_IS_VALID(zfsvfs)) { ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_invalid); return (KMEM_CBRC_DONT_KNOW); } /* * Close a small window in which it's possible that the filesystem could * be unmounted and freed, and zfsvfs, though valid in the previous * statement, could point to unrelated memory by the time we try to * prevent the filesystem from being unmounted. */ rw_enter(&zfsvfs_lock, RW_WRITER); if (zfsvfs != ozp->z_zfsvfs) { rw_exit(&zfsvfs_lock); ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck1); return (KMEM_CBRC_DONT_KNOW); } /* * If the znode is still valid, then so is the file system. We know that * no valid file system can be freed while we hold zfsvfs_lock, so we * can safely ensure that the filesystem is not and will not be * unmounted. The next statement is equivalent to ZFS_ENTER(). */ rrm_enter(&zfsvfs->z_teardown_lock, RW_READER, FTAG); if (zfsvfs->z_unmounted) { ZFS_EXIT(zfsvfs); rw_exit(&zfsvfs_lock); ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_unmounted); return (KMEM_CBRC_DONT_KNOW); } rw_exit(&zfsvfs_lock); mutex_enter(&zfsvfs->z_znodes_lock); /* * Recheck the vfs pointer in case the znode was removed just before * acquiring the lock. */ if (zfsvfs != ozp->z_zfsvfs) { mutex_exit(&zfsvfs->z_znodes_lock); ZFS_EXIT(zfsvfs); ZNODE_STAT_ADD(znode_move_stats.zms_zfsvfs_recheck2); return (KMEM_CBRC_DONT_KNOW); } /* * At this point we know that as long as we hold z_znodes_lock, the * znode cannot be freed and fields within the znode can be safely * accessed. Now, prevent a race with zfs_zget(). */ if (ZFS_OBJ_HOLD_TRYENTER(zfsvfs, ozp->z_id) == 0) { mutex_exit(&zfsvfs->z_znodes_lock); ZFS_EXIT(zfsvfs); ZNODE_STAT_ADD(znode_move_stats.zms_obj_held); return (KMEM_CBRC_LATER); } vp = ZTOV(ozp); if (mutex_tryenter(&vp->v_lock) == 0) { ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); mutex_exit(&zfsvfs->z_znodes_lock); ZFS_EXIT(zfsvfs); ZNODE_STAT_ADD(znode_move_stats.zms_vnode_locked); return (KMEM_CBRC_LATER); } /* Only move znodes that are referenced _only_ by the DNLC. */ if (vp->v_count != 1 || !vn_in_dnlc(vp)) { mutex_exit(&vp->v_lock); ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); mutex_exit(&zfsvfs->z_znodes_lock); ZFS_EXIT(zfsvfs); ZNODE_STAT_ADD(znode_move_stats.zms_not_only_dnlc); return (KMEM_CBRC_LATER); } /* * The znode is known and in a valid state to move. We're holding the * locks needed to execute the critical section. */ zfs_znode_move_impl(ozp, nzp); mutex_exit(&vp->v_lock); ZFS_OBJ_HOLD_EXIT(zfsvfs, ozp->z_id); list_link_replace(&ozp->z_link_node, &nzp->z_link_node); mutex_exit(&zfsvfs->z_znodes_lock); ZFS_EXIT(zfsvfs); return (KMEM_CBRC_YES); } #endif /* illumos */ void zfs_znode_init(void) { /* * Initialize zcache */ rw_init(&zfsvfs_lock, NULL, RW_DEFAULT, NULL); ASSERT(znode_cache == NULL); znode_cache = kmem_cache_create("zfs_znode_cache", sizeof (znode_t), 0, zfs_znode_cache_constructor, zfs_znode_cache_destructor, NULL, NULL, NULL, 0); kmem_cache_set_move(znode_cache, zfs_znode_move); } void zfs_znode_fini(void) { #ifdef illumos /* * Cleanup vfs & vnode ops */ zfs_remove_op_tables(); #endif /* * Cleanup zcache */ if (znode_cache) kmem_cache_destroy(znode_cache); znode_cache = NULL; rw_destroy(&zfsvfs_lock); } #ifdef illumos struct vnodeops *zfs_dvnodeops; struct vnodeops *zfs_fvnodeops; struct vnodeops *zfs_symvnodeops; struct vnodeops *zfs_xdvnodeops; struct vnodeops *zfs_evnodeops; struct vnodeops *zfs_sharevnodeops; void zfs_remove_op_tables() { /* * Remove vfs ops */ ASSERT(zfsfstype); (void) vfs_freevfsops_by_type(zfsfstype); zfsfstype = 0; /* * Remove vnode ops */ if (zfs_dvnodeops) vn_freevnodeops(zfs_dvnodeops); if (zfs_fvnodeops) vn_freevnodeops(zfs_fvnodeops); if (zfs_symvnodeops) vn_freevnodeops(zfs_symvnodeops); if (zfs_xdvnodeops) vn_freevnodeops(zfs_xdvnodeops); if (zfs_evnodeops) vn_freevnodeops(zfs_evnodeops); if (zfs_sharevnodeops) vn_freevnodeops(zfs_sharevnodeops); zfs_dvnodeops = NULL; zfs_fvnodeops = NULL; zfs_symvnodeops = NULL; zfs_xdvnodeops = NULL; zfs_evnodeops = NULL; zfs_sharevnodeops = NULL; } extern const fs_operation_def_t zfs_dvnodeops_template[]; extern const fs_operation_def_t zfs_fvnodeops_template[]; extern const fs_operation_def_t zfs_xdvnodeops_template[]; extern const fs_operation_def_t zfs_symvnodeops_template[]; extern const fs_operation_def_t zfs_evnodeops_template[]; extern const fs_operation_def_t zfs_sharevnodeops_template[]; int zfs_create_op_tables() { int error; /* * zfs_dvnodeops can be set if mod_remove() calls mod_installfs() * due to a failure to remove the the 2nd modlinkage (zfs_modldrv). * In this case we just return as the ops vectors are already set up. */ if (zfs_dvnodeops) return (0); error = vn_make_ops(MNTTYPE_ZFS, zfs_dvnodeops_template, &zfs_dvnodeops); if (error) return (error); error = vn_make_ops(MNTTYPE_ZFS, zfs_fvnodeops_template, &zfs_fvnodeops); if (error) return (error); error = vn_make_ops(MNTTYPE_ZFS, zfs_symvnodeops_template, &zfs_symvnodeops); if (error) return (error); error = vn_make_ops(MNTTYPE_ZFS, zfs_xdvnodeops_template, &zfs_xdvnodeops); if (error) return (error); error = vn_make_ops(MNTTYPE_ZFS, zfs_evnodeops_template, &zfs_evnodeops); if (error) return (error); error = vn_make_ops(MNTTYPE_ZFS, zfs_sharevnodeops_template, &zfs_sharevnodeops); return (error); } #endif /* illumos */ int zfs_create_share_dir(zfsvfs_t *zfsvfs, dmu_tx_t *tx) { zfs_acl_ids_t acl_ids; vattr_t vattr; znode_t *sharezp; znode_t *zp; int error; vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; vattr.va_type = VDIR; vattr.va_mode = S_IFDIR|0555; vattr.va_uid = crgetuid(kcred); vattr.va_gid = crgetgid(kcred); sharezp = kmem_cache_alloc(znode_cache, KM_SLEEP); ASSERT(!POINTER_IS_VALID(sharezp->z_zfsvfs)); sharezp->z_moved = 0; sharezp->z_unlinked = 0; sharezp->z_atime_dirty = 0; sharezp->z_zfsvfs = zfsvfs; sharezp->z_is_sa = zfsvfs->z_use_sa; VERIFY(0 == zfs_acl_ids_create(sharezp, IS_ROOT_NODE, &vattr, kcred, NULL, &acl_ids)); zfs_mknode(sharezp, &vattr, tx, kcred, IS_ROOT_NODE, &zp, &acl_ids); ASSERT3P(zp, ==, sharezp); POINTER_INVALIDATE(&sharezp->z_zfsvfs); error = zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, ZFS_SHARES_DIR, 8, 1, &sharezp->z_id, tx); zfsvfs->z_shares_dir = sharezp->z_id; zfs_acl_ids_free(&acl_ids); sa_handle_destroy(sharezp->z_sa_hdl); kmem_cache_free(znode_cache, sharezp); return (error); } /* * define a couple of values we need available * for both 64 and 32 bit environments. */ #ifndef NBITSMINOR64 #define NBITSMINOR64 32 #endif #ifndef MAXMAJ64 #define MAXMAJ64 0xffffffffUL #endif #ifndef MAXMIN64 #define MAXMIN64 0xffffffffUL #endif /* * Create special expldev for ZFS private use. * Can't use standard expldev since it doesn't do * what we want. The standard expldev() takes a * dev32_t in LP64 and expands it to a long dev_t. * We need an interface that takes a dev32_t in ILP32 * and expands it to a long dev_t. */ static uint64_t zfs_expldev(dev_t dev) { return (((uint64_t)major(dev) << NBITSMINOR64) | minor(dev)); } /* * Special cmpldev for ZFS private use. * Can't use standard cmpldev since it takes * a long dev_t and compresses it to dev32_t in * LP64. We need to do a compaction of a long dev_t * to a dev32_t in ILP32. */ dev_t zfs_cmpldev(uint64_t dev) { return (makedev((dev >> NBITSMINOR64), (dev & MAXMIN64))); } static void zfs_znode_sa_init(zfsvfs_t *zfsvfs, znode_t *zp, dmu_buf_t *db, dmu_object_type_t obj_type, sa_handle_t *sa_hdl) { ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs) || (zfsvfs == zp->z_zfsvfs)); ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zfsvfs, zp->z_id))); mutex_enter(&zp->z_lock); ASSERT(zp->z_sa_hdl == NULL); ASSERT(zp->z_acl_cached == NULL); if (sa_hdl == NULL) { VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED, &zp->z_sa_hdl)); } else { zp->z_sa_hdl = sa_hdl; sa_set_userp(sa_hdl, zp); } zp->z_is_sa = (obj_type == DMU_OT_SA) ? B_TRUE : B_FALSE; /* * Slap on VROOT if we are the root znode */ if (zp->z_id == zfsvfs->z_root) ZTOV(zp)->v_flag |= VROOT; mutex_exit(&zp->z_lock); vn_exists(ZTOV(zp)); } void zfs_znode_dmu_fini(znode_t *zp) { ASSERT(MUTEX_HELD(ZFS_OBJ_MUTEX(zp->z_zfsvfs, zp->z_id)) || zp->z_unlinked || RW_WRITE_HELD(&zp->z_zfsvfs->z_teardown_inactive_lock)); sa_handle_destroy(zp->z_sa_hdl); zp->z_sa_hdl = NULL; } static void zfs_vnode_forget(vnode_t *vp) { /* copied from insmntque_stddtr */ vp->v_data = NULL; vp->v_op = &dead_vnodeops; vgone(vp); vput(vp); } /* * Construct a new znode/vnode and intialize. * * This does not do a call to dmu_set_user() that is * up to the caller to do, in case you don't want to * return the znode */ static znode_t * zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz, dmu_object_type_t obj_type, sa_handle_t *hdl) { znode_t *zp; vnode_t *vp; uint64_t mode; uint64_t parent; sa_bulk_attr_t bulk[9]; int count = 0; int error; zp = kmem_cache_alloc(znode_cache, KM_SLEEP); KASSERT(curthread->td_vp_reserv > 0, ("zfs_znode_alloc: getnewvnode without any vnodes reserved")); error = getnewvnode("zfs", zfsvfs->z_parent->z_vfs, &zfs_vnodeops, &vp); if (error != 0) { kmem_cache_free(znode_cache, zp); return (NULL); } zp->z_vnode = vp; vp->v_data = zp; ASSERT(zp->z_dirlocks == NULL); ASSERT(!POINTER_IS_VALID(zp->z_zfsvfs)); zp->z_moved = 0; /* * Defer setting z_zfsvfs until the znode is ready to be a candidate for * the zfs_znode_move() callback. */ zp->z_sa_hdl = NULL; zp->z_unlinked = 0; zp->z_atime_dirty = 0; zp->z_mapcnt = 0; zp->z_id = db->db_object; zp->z_blksz = blksz; zp->z_seq = 0x7A4653; zp->z_sync_cnt = 0; vp = ZTOV(zp); zfs_znode_sa_init(zfsvfs, zp, db, obj_type, hdl); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &zp->z_gen, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, &zp->z_size, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL, &zp->z_links, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, &zp->z_atime, 16); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &zp->z_uid, 8); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &zp->z_gid, 8); if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count) != 0 || zp->z_gen == 0) { if (hdl == NULL) sa_handle_destroy(zp->z_sa_hdl); zfs_vnode_forget(vp); zp->z_vnode = NULL; kmem_cache_free(znode_cache, zp); return (NULL); } zp->z_mode = mode; vp->v_type = IFTOVT((mode_t)mode); switch (vp->v_type) { case VDIR: zp->z_zn_prefetch = B_TRUE; /* z_prefetch default is enabled */ break; #ifdef illumos case VBLK: case VCHR: { uint64_t rdev; VERIFY(sa_lookup(zp->z_sa_hdl, SA_ZPL_RDEV(zfsvfs), &rdev, sizeof (rdev)) == 0); vp->v_rdev = zfs_cmpldev(rdev); } break; #endif case VFIFO: #ifdef illumos case VSOCK: case VDOOR: #endif vp->v_op = &zfs_fifoops; break; case VREG: if (parent == zfsvfs->z_shares_dir) { ASSERT(zp->z_uid == 0 && zp->z_gid == 0); vp->v_op = &zfs_shareops; } break; #ifdef illumos case VLNK: vn_setops(vp, zfs_symvnodeops); break; default: vn_setops(vp, zfs_evnodeops); break; #endif } mutex_enter(&zfsvfs->z_znodes_lock); list_insert_tail(&zfsvfs->z_all_znodes, zp); membar_producer(); /* * Everything else must be valid before assigning z_zfsvfs makes the * znode eligible for zfs_znode_move(). */ zp->z_zfsvfs = zfsvfs; mutex_exit(&zfsvfs->z_znodes_lock); /* * Acquire vnode lock before making it available to the world. */ vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); VN_LOCK_AREC(vp); if (vp->v_type != VFIFO) VN_LOCK_ASHARE(vp); +#ifdef illumos VFS_HOLD(zfsvfs->z_vfs); +#endif return (zp); } static uint64_t empty_xattr; static uint64_t pad[4]; static zfs_acl_phys_t acl_phys; /* * Create a new DMU object to hold a zfs znode. * * IN: dzp - parent directory for new znode * vap - file attributes for new znode * tx - dmu transaction id for zap operations * cr - credentials of caller * flag - flags: * IS_ROOT_NODE - new object will be root * IS_XATTR - new object is an attribute * bonuslen - length of bonus buffer * setaclp - File/Dir initial ACL * fuidp - Tracks fuid allocation. * * OUT: zpp - allocated znode * */ void zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr, uint_t flag, znode_t **zpp, zfs_acl_ids_t *acl_ids) { uint64_t crtime[2], atime[2], mtime[2], ctime[2]; uint64_t mode, size, links, parent, pflags; uint64_t dzp_pflags = 0; uint64_t rdev = 0; zfsvfs_t *zfsvfs = dzp->z_zfsvfs; dmu_buf_t *db; timestruc_t now; uint64_t gen, obj; int err; int bonuslen; sa_handle_t *sa_hdl; dmu_object_type_t obj_type; sa_bulk_attr_t sa_attrs[ZPL_END]; int cnt = 0; zfs_acl_locator_cb_t locate = { 0 }; ASSERT(vap && (vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); if (zfsvfs->z_replay) { obj = vap->va_nodeid; now = vap->va_ctime; /* see zfs_replay_create() */ gen = vap->va_nblocks; /* ditto */ } else { obj = 0; vfs_timestamp(&now); gen = dmu_tx_get_txg(tx); } obj_type = zfsvfs->z_use_sa ? DMU_OT_SA : DMU_OT_ZNODE; bonuslen = (obj_type == DMU_OT_SA) ? DN_MAX_BONUSLEN : ZFS_OLD_ZNODE_PHYS_SIZE; /* * Create a new DMU object. */ /* * There's currently no mechanism for pre-reading the blocks that will * be needed to allocate a new object, so we accept the small chance * that there will be an i/o error and we will fail one of the * assertions below. */ if (vap->va_type == VDIR) { if (zfsvfs->z_replay) { VERIFY0(zap_create_claim_norm(zfsvfs->z_os, obj, zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, obj_type, bonuslen, tx)); } else { obj = zap_create_norm(zfsvfs->z_os, zfsvfs->z_norm, DMU_OT_DIRECTORY_CONTENTS, obj_type, bonuslen, tx); } } else { if (zfsvfs->z_replay) { VERIFY0(dmu_object_claim(zfsvfs->z_os, obj, DMU_OT_PLAIN_FILE_CONTENTS, 0, obj_type, bonuslen, tx)); } else { obj = dmu_object_alloc(zfsvfs->z_os, DMU_OT_PLAIN_FILE_CONTENTS, 0, obj_type, bonuslen, tx); } } ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); VERIFY(0 == sa_buf_hold(zfsvfs->z_os, obj, NULL, &db)); /* * If this is the root, fix up the half-initialized parent pointer * to reference the just-allocated physical data area. */ if (flag & IS_ROOT_NODE) { dzp->z_id = obj; } else { dzp_pflags = dzp->z_pflags; } /* * If parent is an xattr, so am I. */ if (dzp_pflags & ZFS_XATTR) { flag |= IS_XATTR; } if (zfsvfs->z_use_fuids) pflags = ZFS_ARCHIVE | ZFS_AV_MODIFIED; else pflags = 0; if (vap->va_type == VDIR) { size = 2; /* contents ("." and "..") */ links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1; } else { size = links = 0; } if (vap->va_type == VBLK || vap->va_type == VCHR) { rdev = zfs_expldev(vap->va_rdev); } parent = dzp->z_id; mode = acl_ids->z_mode; if (flag & IS_XATTR) pflags |= ZFS_XATTR; /* * No execs denied will be deterimed when zfs_mode_compute() is called. */ pflags |= acl_ids->z_aclp->z_hints & (ZFS_ACL_TRIVIAL|ZFS_INHERIT_ACE|ZFS_ACL_AUTO_INHERIT| ZFS_ACL_DEFAULTED|ZFS_ACL_PROTECTED); ZFS_TIME_ENCODE(&now, crtime); ZFS_TIME_ENCODE(&now, ctime); if (vap->va_mask & AT_ATIME) { ZFS_TIME_ENCODE(&vap->va_atime, atime); } else { ZFS_TIME_ENCODE(&now, atime); } if (vap->va_mask & AT_MTIME) { ZFS_TIME_ENCODE(&vap->va_mtime, mtime); } else { ZFS_TIME_ENCODE(&now, mtime); } /* Now add in all of the "SA" attributes */ VERIFY(0 == sa_handle_get_from_db(zfsvfs->z_os, db, NULL, SA_HDL_SHARED, &sa_hdl)); /* * Setup the array of attributes to be replaced/set on the new file * * order for DMU_OT_ZNODE is critical since it needs to be constructed * in the old znode_phys_t format. Don't change this ordering */ if (obj_type == DMU_OT_ZNODE) { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs), NULL, &gen, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs), NULL, &size, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); } else { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MODE(zfsvfs), NULL, &mode, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_SIZE(zfsvfs), NULL, &size, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GEN(zfsvfs), NULL, &gen, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL, &acl_ids->z_fuid, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL, &acl_ids->z_fgid, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PARENT(zfsvfs), NULL, &parent, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs), NULL, &pflags, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs), NULL, &atime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_CRTIME(zfsvfs), NULL, &crtime, 16); } SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_LINKS(zfsvfs), NULL, &links, 8); if (obj_type == DMU_OT_ZNODE) { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_XATTR(zfsvfs), NULL, &empty_xattr, 8); } if (obj_type == DMU_OT_ZNODE || (vap->va_type == VBLK || vap->va_type == VCHR)) { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_RDEV(zfsvfs), NULL, &rdev, 8); } if (obj_type == DMU_OT_ZNODE) { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_FLAGS(zfsvfs), NULL, &pflags, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_UID(zfsvfs), NULL, &acl_ids->z_fuid, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_GID(zfsvfs), NULL, &acl_ids->z_fgid, 8); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_PAD(zfsvfs), NULL, pad, sizeof (uint64_t) * 4); SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ZNODE_ACL(zfsvfs), NULL, &acl_phys, sizeof (zfs_acl_phys_t)); } else if (acl_ids->z_aclp->z_version >= ZFS_ACL_VERSION_FUID) { SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_COUNT(zfsvfs), NULL, &acl_ids->z_aclp->z_acl_count, 8); locate.cb_aclp = acl_ids->z_aclp; SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_DACL_ACES(zfsvfs), zfs_acl_data_locator, &locate, acl_ids->z_aclp->z_acl_bytes); mode = zfs_mode_compute(mode, acl_ids->z_aclp, &pflags, acl_ids->z_fuid, acl_ids->z_fgid); } VERIFY(sa_replace_all_by_template(sa_hdl, sa_attrs, cnt, tx) == 0); if (!(flag & IS_ROOT_NODE)) { *zpp = zfs_znode_alloc(zfsvfs, db, 0, obj_type, sa_hdl); ASSERT(*zpp != NULL); } else { /* * If we are creating the root node, the "parent" we * passed in is the znode for the root. */ *zpp = dzp; (*zpp)->z_sa_hdl = sa_hdl; } (*zpp)->z_pflags = pflags; (*zpp)->z_mode = mode; if (vap->va_mask & AT_XVATTR) zfs_xvattr_set(*zpp, (xvattr_t *)vap, tx); if (obj_type == DMU_OT_ZNODE || acl_ids->z_aclp->z_version < ZFS_ACL_VERSION_FUID) { VERIFY0(zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx)); } if (!(flag & IS_ROOT_NODE)) { vnode_t *vp; vp = ZTOV(*zpp); vp->v_vflag |= VV_FORCEINSMQ; err = insmntque(vp, zfsvfs->z_vfs); vp->v_vflag &= ~VV_FORCEINSMQ; KASSERT(err == 0, ("insmntque() failed: error %d", err)); } ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); } /* * Update in-core attributes. It is assumed the caller will be doing an * sa_bulk_update to push the changes out. */ void zfs_xvattr_set(znode_t *zp, xvattr_t *xvap, dmu_tx_t *tx) { xoptattr_t *xoap; xoap = xva_getxoptattr(xvap); ASSERT(xoap); if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { uint64_t times[2]; ZFS_TIME_ENCODE(&xoap->xoa_createtime, times); (void) sa_update(zp->z_sa_hdl, SA_ZPL_CRTIME(zp->z_zfsvfs), ×, sizeof (times), tx); XVA_SET_RTN(xvap, XAT_CREATETIME); } if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { ZFS_ATTR_SET(zp, ZFS_READONLY, xoap->xoa_readonly, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_READONLY); } if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { ZFS_ATTR_SET(zp, ZFS_HIDDEN, xoap->xoa_hidden, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_HIDDEN); } if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { ZFS_ATTR_SET(zp, ZFS_SYSTEM, xoap->xoa_system, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_SYSTEM); } if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { ZFS_ATTR_SET(zp, ZFS_ARCHIVE, xoap->xoa_archive, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_ARCHIVE); } if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { ZFS_ATTR_SET(zp, ZFS_IMMUTABLE, xoap->xoa_immutable, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_IMMUTABLE); } if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { ZFS_ATTR_SET(zp, ZFS_NOUNLINK, xoap->xoa_nounlink, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_NOUNLINK); } if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { ZFS_ATTR_SET(zp, ZFS_APPENDONLY, xoap->xoa_appendonly, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_APPENDONLY); } if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { ZFS_ATTR_SET(zp, ZFS_NODUMP, xoap->xoa_nodump, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_NODUMP); } if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { ZFS_ATTR_SET(zp, ZFS_OPAQUE, xoap->xoa_opaque, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_OPAQUE); } if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { ZFS_ATTR_SET(zp, ZFS_AV_QUARANTINED, xoap->xoa_av_quarantined, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); } if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { ZFS_ATTR_SET(zp, ZFS_AV_MODIFIED, xoap->xoa_av_modified, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_AV_MODIFIED); } if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { zfs_sa_set_scanstamp(zp, xvap, tx); XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); } if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { ZFS_ATTR_SET(zp, ZFS_REPARSE, xoap->xoa_reparse, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_REPARSE); } if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) { ZFS_ATTR_SET(zp, ZFS_OFFLINE, xoap->xoa_offline, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_OFFLINE); } if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) { ZFS_ATTR_SET(zp, ZFS_SPARSE, xoap->xoa_sparse, zp->z_pflags, tx); XVA_SET_RTN(xvap, XAT_SPARSE); } } int zfs_zget(zfsvfs_t *zfsvfs, uint64_t obj_num, znode_t **zpp) { dmu_object_info_t doi; dmu_buf_t *db; znode_t *zp; vnode_t *vp; sa_handle_t *hdl; struct thread *td; int locked; int err; td = curthread; getnewvnode_reserve(1); again: *zpp = NULL; ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db); if (err) { ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); getnewvnode_drop_reserve(); return (err); } dmu_object_info_from_db(db, &doi); if (doi.doi_bonus_type != DMU_OT_SA && (doi.doi_bonus_type != DMU_OT_ZNODE || (doi.doi_bonus_type == DMU_OT_ZNODE && doi.doi_bonus_size < sizeof (znode_phys_t)))) { sa_buf_rele(db, NULL); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); #ifdef __FreeBSD__ getnewvnode_drop_reserve(); #endif return (SET_ERROR(EINVAL)); } hdl = dmu_buf_get_user(db); if (hdl != NULL) { zp = sa_get_userdata(hdl); /* * Since "SA" does immediate eviction we * should never find a sa handle that doesn't * know about the znode. */ ASSERT3P(zp, !=, NULL); mutex_enter(&zp->z_lock); ASSERT3U(zp->z_id, ==, obj_num); if (zp->z_unlinked) { err = SET_ERROR(ENOENT); } else { vp = ZTOV(zp); *zpp = zp; err = 0; } /* Don't let the vnode disappear after ZFS_OBJ_HOLD_EXIT. */ if (err == 0) VN_HOLD(vp); mutex_exit(&zp->z_lock); sa_buf_rele(db, NULL); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); if (err == 0) { locked = VOP_ISLOCKED(vp); VI_LOCK(vp); if ((vp->v_iflag & VI_DOOMED) != 0 && locked != LK_EXCLUSIVE) { /* * The vnode is doomed and this thread doesn't * hold the exclusive lock on it, so the vnode * must be being reclaimed by another thread. * Otherwise the doomed vnode is being reclaimed * by this thread and zfs_zget is called from * ZIL internals. */ VI_UNLOCK(vp); VN_RELE(vp); goto again; } VI_UNLOCK(vp); } getnewvnode_drop_reserve(); return (err); } /* * Not found create new znode/vnode * but only if file exists. * * There is a small window where zfs_vget() could * find this object while a file create is still in * progress. This is checked for in zfs_znode_alloc() * * if zfs_znode_alloc() fails it will drop the hold on the * bonus buffer. */ zp = zfs_znode_alloc(zfsvfs, db, doi.doi_data_block_size, doi.doi_bonus_type, NULL); if (zp == NULL) { err = SET_ERROR(ENOENT); } else { *zpp = zp; } if (err == 0) { vnode_t *vp = ZTOV(zp); err = insmntque(vp, zfsvfs->z_vfs); if (err == 0) { vp->v_hash = obj_num; VOP_UNLOCK(vp, 0); } else { zp->z_vnode = NULL; zfs_znode_dmu_fini(zp); zfs_znode_free(zp); *zpp = NULL; } } ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); getnewvnode_drop_reserve(); return (err); } int zfs_rezget(znode_t *zp) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; dmu_object_info_t doi; dmu_buf_t *db; vnode_t *vp; uint64_t obj_num = zp->z_id; uint64_t mode, size; sa_bulk_attr_t bulk[8]; int err; int count = 0; uint64_t gen; ZFS_OBJ_HOLD_ENTER(zfsvfs, obj_num); mutex_enter(&zp->z_acl_lock); if (zp->z_acl_cached) { zfs_acl_free(zp->z_acl_cached); zp->z_acl_cached = NULL; } mutex_exit(&zp->z_acl_lock); ASSERT(zp->z_sa_hdl == NULL); err = sa_buf_hold(zfsvfs->z_os, obj_num, NULL, &db); if (err) { ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (err); } dmu_object_info_from_db(db, &doi); if (doi.doi_bonus_type != DMU_OT_SA && (doi.doi_bonus_type != DMU_OT_ZNODE || (doi.doi_bonus_type == DMU_OT_ZNODE && doi.doi_bonus_size < sizeof (znode_phys_t)))) { sa_buf_rele(db, NULL); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (SET_ERROR(EINVAL)); } zfs_znode_sa_init(zfsvfs, zp, db, doi.doi_bonus_type, NULL); size = zp->z_size; /* reload cached values */ SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zfsvfs), NULL, &gen, sizeof (gen)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, &zp->z_size, sizeof (zp->z_size)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zfsvfs), NULL, &zp->z_links, sizeof (zp->z_links)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, sizeof (zp->z_pflags)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, &zp->z_atime, sizeof (zp->z_atime)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, &zp->z_uid, sizeof (zp->z_uid)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, &zp->z_gid, sizeof (zp->z_gid)); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, &mode, sizeof (mode)); if (sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) { zfs_znode_dmu_fini(zp); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (SET_ERROR(EIO)); } zp->z_mode = mode; if (gen != zp->z_gen) { zfs_znode_dmu_fini(zp); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (SET_ERROR(EIO)); } /* * It is highly improbable but still quite possible that two * objects in different datasets are created with the same * object numbers and in transaction groups with the same * numbers. znodes corresponding to those objects would * have the same z_id and z_gen, but their other attributes * may be different. * zfs recv -F may replace one of such objects with the other. * As a result file properties recorded in the replaced * object's vnode may no longer match the received object's * properties. At present the only cached property is the * files type recorded in v_type. * So, handle this case by leaving the old vnode and znode * disassociated from the actual object. A new vnode and a * znode will be created if the object is accessed * (e.g. via a look-up). The old vnode and znode will be * recycled when the last vnode reference is dropped. */ vp = ZTOV(zp); if (vp != NULL && vp->v_type != IFTOVT((mode_t)zp->z_mode)) { zfs_znode_dmu_fini(zp); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (EIO); } zp->z_unlinked = (zp->z_links == 0); zp->z_blksz = doi.doi_data_block_size; if (vp != NULL) { vn_pages_remove(vp, 0, 0); if (zp->z_size != size) vnode_pager_setsize(vp, zp->z_size); } ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num); return (0); } void zfs_znode_delete(znode_t *zp, dmu_tx_t *tx) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; objset_t *os = zfsvfs->z_os; uint64_t obj = zp->z_id; uint64_t acl_obj = zfs_external_acl(zp); ZFS_OBJ_HOLD_ENTER(zfsvfs, obj); if (acl_obj) { VERIFY(!zp->z_is_sa); VERIFY(0 == dmu_object_free(os, acl_obj, tx)); } VERIFY(0 == dmu_object_free(os, obj, tx)); zfs_znode_dmu_fini(zp); ZFS_OBJ_HOLD_EXIT(zfsvfs, obj); zfs_znode_free(zp); } void zfs_zinactive(znode_t *zp) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; uint64_t z_id = zp->z_id; ASSERT(zp->z_sa_hdl); /* * Don't allow a zfs_zget() while were trying to release this znode */ ZFS_OBJ_HOLD_ENTER(zfsvfs, z_id); mutex_enter(&zp->z_lock); /* * If this was the last reference to a file with no links, * remove the file from the file system. */ if (zp->z_unlinked) { mutex_exit(&zp->z_lock); ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); zfs_rmnode(zp); return; } mutex_exit(&zp->z_lock); zfs_znode_dmu_fini(zp); ZFS_OBJ_HOLD_EXIT(zfsvfs, z_id); zfs_znode_free(zp); } void zfs_znode_free(znode_t *zp) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; ASSERT(zp->z_sa_hdl == NULL); zp->z_vnode = NULL; mutex_enter(&zfsvfs->z_znodes_lock); POINTER_INVALIDATE(&zp->z_zfsvfs); list_remove(&zfsvfs->z_all_znodes, zp); mutex_exit(&zfsvfs->z_znodes_lock); if (zp->z_acl_cached) { zfs_acl_free(zp->z_acl_cached); zp->z_acl_cached = NULL; } kmem_cache_free(znode_cache, zp); +#ifdef illumos VFS_RELE(zfsvfs->z_vfs); +#endif } void zfs_tstamp_update_setup(znode_t *zp, uint_t flag, uint64_t mtime[2], uint64_t ctime[2], boolean_t have_tx) { timestruc_t now; vfs_timestamp(&now); if (have_tx) { /* will sa_bulk_update happen really soon? */ zp->z_atime_dirty = 0; zp->z_seq++; } else { zp->z_atime_dirty = 1; } if (flag & AT_ATIME) { ZFS_TIME_ENCODE(&now, zp->z_atime); } if (flag & AT_MTIME) { ZFS_TIME_ENCODE(&now, mtime); if (zp->z_zfsvfs->z_use_fuids) { zp->z_pflags |= (ZFS_ARCHIVE | ZFS_AV_MODIFIED); } } if (flag & AT_CTIME) { ZFS_TIME_ENCODE(&now, ctime); if (zp->z_zfsvfs->z_use_fuids) zp->z_pflags |= ZFS_ARCHIVE; } } /* * Grow the block size for a file. * * IN: zp - znode of file to free data in. * size - requested block size * tx - open transaction. * * NOTE: this function assumes that the znode is write locked. */ void zfs_grow_blocksize(znode_t *zp, uint64_t size, dmu_tx_t *tx) { int error; u_longlong_t dummy; if (size <= zp->z_blksz) return; /* * If the file size is already greater than the current blocksize, * we will not grow. If there is more than one block in a file, * the blocksize cannot change. */ if (zp->z_blksz && zp->z_size > zp->z_blksz) return; error = dmu_object_set_blocksize(zp->z_zfsvfs->z_os, zp->z_id, size, 0, tx); if (error == ENOTSUP) return; ASSERT0(error); /* What blocksize did we actually get? */ dmu_object_size_from_db(sa_get_db(zp->z_sa_hdl), &zp->z_blksz, &dummy); } #ifdef illumos /* * This is a dummy interface used when pvn_vplist_dirty() should *not* * be calling back into the fs for a putpage(). E.g.: when truncating * a file, the pages being "thrown away* don't need to be written out. */ /* ARGSUSED */ static int zfs_no_putpage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp, int flags, cred_t *cr) { ASSERT(0); return (0); } #endif /* * Increase the file length * * IN: zp - znode of file to free data in. * end - new end-of-file * * RETURN: 0 on success, error code on failure */ static int zfs_extend(znode_t *zp, uint64_t end) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; dmu_tx_t *tx; rl_t *rl; uint64_t newblksz; int error; /* * We will change zp_size, lock the whole file. */ rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); /* * Nothing to do if file already at desired length. */ if (end <= zp->z_size) { zfs_range_unlock(rl); return (0); } tx = dmu_tx_create(zfsvfs->z_os); dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); zfs_sa_upgrade_txholds(tx, zp); if (end > zp->z_blksz && (!ISP2(zp->z_blksz) || zp->z_blksz < zfsvfs->z_max_blksz)) { /* * We are growing the file past the current block size. */ if (zp->z_blksz > zp->z_zfsvfs->z_max_blksz) { /* * File's blocksize is already larger than the * "recordsize" property. Only let it grow to * the next power of 2. */ ASSERT(!ISP2(zp->z_blksz)); newblksz = MIN(end, 1 << highbit64(zp->z_blksz)); } else { newblksz = MIN(end, zp->z_zfsvfs->z_max_blksz); } dmu_tx_hold_write(tx, zp->z_id, 0, newblksz); } else { newblksz = 0; } error = dmu_tx_assign(tx, TXG_WAIT); if (error) { dmu_tx_abort(tx); zfs_range_unlock(rl); return (error); } if (newblksz) zfs_grow_blocksize(zp, newblksz, tx); zp->z_size = end; VERIFY(0 == sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zp->z_zfsvfs), &zp->z_size, sizeof (zp->z_size), tx)); vnode_pager_setsize(ZTOV(zp), end); zfs_range_unlock(rl); dmu_tx_commit(tx); return (0); } /* * Free space in a file. * * IN: zp - znode of file to free data in. * off - start of section to free. * len - length of section to free. * * RETURN: 0 on success, error code on failure */ static int zfs_free_range(znode_t *zp, uint64_t off, uint64_t len) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; rl_t *rl; int error; /* * Lock the range being freed. */ rl = zfs_range_lock(zp, off, len, RL_WRITER); /* * Nothing to do if file already at desired length. */ if (off >= zp->z_size) { zfs_range_unlock(rl); return (0); } if (off + len > zp->z_size) len = zp->z_size - off; error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, off, len); if (error == 0) { /* * In FreeBSD we cannot free block in the middle of a file, * but only at the end of a file, so this code path should * never happen. */ vnode_pager_setsize(ZTOV(zp), off); } zfs_range_unlock(rl); return (error); } /* * Truncate a file * * IN: zp - znode of file to free data in. * end - new end-of-file. * * RETURN: 0 on success, error code on failure */ static int zfs_trunc(znode_t *zp, uint64_t end) { zfsvfs_t *zfsvfs = zp->z_zfsvfs; vnode_t *vp = ZTOV(zp); dmu_tx_t *tx; rl_t *rl; int error; sa_bulk_attr_t bulk[2]; int count = 0; /* * We will change zp_size, lock the whole file. */ rl = zfs_range_lock(zp, 0, UINT64_MAX, RL_WRITER); /* * Nothing to do if file already at desired length. */ if (end >= zp->z_size) { zfs_range_unlock(rl); return (0); } error = dmu_free_long_range(zfsvfs->z_os, zp->z_id, end, -1); if (error) { zfs_range_unlock(rl); return (error); } tx = dmu_tx_create(zfsvfs->z_os); dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); zfs_sa_upgrade_txholds(tx, zp); dmu_tx_mark_netfree(tx); error = dmu_tx_assign(tx, TXG_WAIT); if (error) { dmu_tx_abort(tx); zfs_range_unlock(rl); return (error); } zp->z_size = end; SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, &zp->z_size, sizeof (zp->z_size)); if (end == 0) { zp->z_pflags &= ~ZFS_SPARSE; SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, 8); } VERIFY(sa_bulk_update(zp->z_sa_hdl, bulk, count, tx) == 0); dmu_tx_commit(tx); /* * Clear any mapped pages in the truncated region. This has to * happen outside of the transaction to avoid the possibility of * a deadlock with someone trying to push a page that we are * about to invalidate. */ vnode_pager_setsize(vp, end); zfs_range_unlock(rl); return (0); } /* * Free space in a file * * IN: zp - znode of file to free data in. * off - start of range * len - end of range (0 => EOF) * flag - current file open mode flags. * log - TRUE if this action should be logged * * RETURN: 0 on success, error code on failure */ int zfs_freesp(znode_t *zp, uint64_t off, uint64_t len, int flag, boolean_t log) { vnode_t *vp = ZTOV(zp); dmu_tx_t *tx; zfsvfs_t *zfsvfs = zp->z_zfsvfs; zilog_t *zilog = zfsvfs->z_log; uint64_t mode; uint64_t mtime[2], ctime[2]; sa_bulk_attr_t bulk[3]; int count = 0; int error; if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), &mode, sizeof (mode))) != 0) return (error); if (off > zp->z_size) { error = zfs_extend(zp, off+len); if (error == 0 && log) goto log; else return (error); } /* * Check for any locks in the region to be freed. */ if (MANDLOCK(vp, (mode_t)mode)) { uint64_t length = (len ? len : zp->z_size - off); if (error = chklock(vp, FWRITE, off, length, flag, NULL)) return (error); } if (len == 0) { error = zfs_trunc(zp, off); } else { if ((error = zfs_free_range(zp, off, len)) == 0 && off + len > zp->z_size) error = zfs_extend(zp, off+len); } if (error || !log) return (error); log: tx = dmu_tx_create(zfsvfs->z_os); dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); zfs_sa_upgrade_txholds(tx, zp); error = dmu_tx_assign(tx, TXG_WAIT); if (error) { dmu_tx_abort(tx); return (error); } SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, mtime, 16); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, ctime, 16); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, 8); zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, B_TRUE); error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); ASSERT(error == 0); zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len); dmu_tx_commit(tx); return (0); } void zfs_create_fs(objset_t *os, cred_t *cr, nvlist_t *zplprops, dmu_tx_t *tx) { uint64_t moid, obj, sa_obj, version; uint64_t sense = ZFS_CASE_SENSITIVE; uint64_t norm = 0; nvpair_t *elem; int error; int i; znode_t *rootzp = NULL; zfsvfs_t *zfsvfs; vattr_t vattr; znode_t *zp; zfs_acl_ids_t acl_ids; /* * First attempt to create master node. */ /* * In an empty objset, there are no blocks to read and thus * there can be no i/o errors (which we assert below). */ moid = MASTER_NODE_OBJ; error = zap_create_claim(os, moid, DMU_OT_MASTER_NODE, DMU_OT_NONE, 0, tx); ASSERT(error == 0); /* * Set starting attributes. */ version = zfs_zpl_version_map(spa_version(dmu_objset_spa(os))); elem = NULL; while ((elem = nvlist_next_nvpair(zplprops, elem)) != NULL) { /* For the moment we expect all zpl props to be uint64_ts */ uint64_t val; char *name; ASSERT(nvpair_type(elem) == DATA_TYPE_UINT64); VERIFY(nvpair_value_uint64(elem, &val) == 0); name = nvpair_name(elem); if (strcmp(name, zfs_prop_to_name(ZFS_PROP_VERSION)) == 0) { if (val < version) version = val; } else { error = zap_update(os, moid, name, 8, 1, &val, tx); } ASSERT(error == 0); if (strcmp(name, zfs_prop_to_name(ZFS_PROP_NORMALIZE)) == 0) norm = val; else if (strcmp(name, zfs_prop_to_name(ZFS_PROP_CASE)) == 0) sense = val; } ASSERT(version != 0); error = zap_update(os, moid, ZPL_VERSION_STR, 8, 1, &version, tx); /* * Create zap object used for SA attribute registration */ if (version >= ZPL_VERSION_SA) { sa_obj = zap_create(os, DMU_OT_SA_MASTER_NODE, DMU_OT_NONE, 0, tx); error = zap_add(os, moid, ZFS_SA_ATTRS, 8, 1, &sa_obj, tx); ASSERT(error == 0); } else { sa_obj = 0; } /* * Create a delete queue. */ obj = zap_create(os, DMU_OT_UNLINKED_SET, DMU_OT_NONE, 0, tx); error = zap_add(os, moid, ZFS_UNLINKED_SET, 8, 1, &obj, tx); ASSERT(error == 0); /* * Create root znode. Create minimal znode/vnode/zfsvfs * to allow zfs_mknode to work. */ VATTR_NULL(&vattr); vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE; vattr.va_type = VDIR; vattr.va_mode = S_IFDIR|0755; vattr.va_uid = crgetuid(cr); vattr.va_gid = crgetgid(cr); zfsvfs = kmem_zalloc(sizeof (zfsvfs_t), KM_SLEEP); rootzp = kmem_cache_alloc(znode_cache, KM_SLEEP); ASSERT(!POINTER_IS_VALID(rootzp->z_zfsvfs)); rootzp->z_moved = 0; rootzp->z_unlinked = 0; rootzp->z_atime_dirty = 0; rootzp->z_is_sa = USE_SA(version, os); zfsvfs->z_os = os; zfsvfs->z_parent = zfsvfs; zfsvfs->z_version = version; zfsvfs->z_use_fuids = USE_FUIDS(version, os); zfsvfs->z_use_sa = USE_SA(version, os); zfsvfs->z_norm = norm; error = sa_setup(os, sa_obj, zfs_attr_table, ZPL_END, &zfsvfs->z_attr_table); ASSERT(error == 0); /* * Fold case on file systems that are always or sometimes case * insensitive. */ if (sense == ZFS_CASE_INSENSITIVE || sense == ZFS_CASE_MIXED) zfsvfs->z_norm |= U8_TEXTPREP_TOUPPER; mutex_init(&zfsvfs->z_znodes_lock, NULL, MUTEX_DEFAULT, NULL); list_create(&zfsvfs->z_all_znodes, sizeof (znode_t), offsetof(znode_t, z_link_node)); for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) mutex_init(&zfsvfs->z_hold_mtx[i], NULL, MUTEX_DEFAULT, NULL); rootzp->z_zfsvfs = zfsvfs; VERIFY(0 == zfs_acl_ids_create(rootzp, IS_ROOT_NODE, &vattr, cr, NULL, &acl_ids)); zfs_mknode(rootzp, &vattr, tx, cr, IS_ROOT_NODE, &zp, &acl_ids); ASSERT3P(zp, ==, rootzp); error = zap_add(os, moid, ZFS_ROOT_OBJ, 8, 1, &rootzp->z_id, tx); ASSERT(error == 0); zfs_acl_ids_free(&acl_ids); POINTER_INVALIDATE(&rootzp->z_zfsvfs); sa_handle_destroy(rootzp->z_sa_hdl); kmem_cache_free(znode_cache, rootzp); /* * Create shares directory */ error = zfs_create_share_dir(zfsvfs, tx); ASSERT(error == 0); for (i = 0; i != ZFS_OBJ_MTX_SZ; i++) mutex_destroy(&zfsvfs->z_hold_mtx[i]); kmem_free(zfsvfs, sizeof (zfsvfs_t)); } #endif /* _KERNEL */ static int zfs_sa_setup(objset_t *osp, sa_attr_type_t **sa_table) { uint64_t sa_obj = 0; int error; error = zap_lookup(osp, MASTER_NODE_OBJ, ZFS_SA_ATTRS, 8, 1, &sa_obj); if (error != 0 && error != ENOENT) return (error); error = sa_setup(osp, sa_obj, zfs_attr_table, ZPL_END, sa_table); return (error); } static int zfs_grab_sa_handle(objset_t *osp, uint64_t obj, sa_handle_t **hdlp, dmu_buf_t **db, void *tag) { dmu_object_info_t doi; int error; if ((error = sa_buf_hold(osp, obj, tag, db)) != 0) return (error); dmu_object_info_from_db(*db, &doi); if ((doi.doi_bonus_type != DMU_OT_SA && doi.doi_bonus_type != DMU_OT_ZNODE) || doi.doi_bonus_type == DMU_OT_ZNODE && doi.doi_bonus_size < sizeof (znode_phys_t)) { sa_buf_rele(*db, tag); return (SET_ERROR(ENOTSUP)); } error = sa_handle_get(osp, obj, NULL, SA_HDL_PRIVATE, hdlp); if (error != 0) { sa_buf_rele(*db, tag); return (error); } return (0); } void zfs_release_sa_handle(sa_handle_t *hdl, dmu_buf_t *db, void *tag) { sa_handle_destroy(hdl); sa_buf_rele(db, tag); } /* * Given an object number, return its parent object number and whether * or not the object is an extended attribute directory. */ static int zfs_obj_to_pobj(objset_t *osp, sa_handle_t *hdl, sa_attr_type_t *sa_table, uint64_t *pobjp, int *is_xattrdir) { uint64_t parent; uint64_t pflags; uint64_t mode; uint64_t parent_mode; sa_bulk_attr_t bulk[3]; sa_handle_t *sa_hdl; dmu_buf_t *sa_db; int count = 0; int error; SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_PARENT], NULL, &parent, sizeof (parent)); SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_FLAGS], NULL, &pflags, sizeof (pflags)); SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL, &mode, sizeof (mode)); if ((error = sa_bulk_lookup(hdl, bulk, count)) != 0) return (error); /* * When a link is removed its parent pointer is not changed and will * be invalid. There are two cases where a link is removed but the * file stays around, when it goes to the delete queue and when there * are additional links. */ error = zfs_grab_sa_handle(osp, parent, &sa_hdl, &sa_db, FTAG); if (error != 0) return (error); error = sa_lookup(sa_hdl, ZPL_MODE, &parent_mode, sizeof (parent_mode)); zfs_release_sa_handle(sa_hdl, sa_db, FTAG); if (error != 0) return (error); *is_xattrdir = ((pflags & ZFS_XATTR) != 0) && S_ISDIR(mode); /* * Extended attributes can be applied to files, directories, etc. * Otherwise the parent must be a directory. */ if (!*is_xattrdir && !S_ISDIR(parent_mode)) return (SET_ERROR(EINVAL)); *pobjp = parent; return (0); } /* * Given an object number, return some zpl level statistics */ static int zfs_obj_to_stats_impl(sa_handle_t *hdl, sa_attr_type_t *sa_table, zfs_stat_t *sb) { sa_bulk_attr_t bulk[4]; int count = 0; SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_MODE], NULL, &sb->zs_mode, sizeof (sb->zs_mode)); SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_GEN], NULL, &sb->zs_gen, sizeof (sb->zs_gen)); SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_LINKS], NULL, &sb->zs_links, sizeof (sb->zs_links)); SA_ADD_BULK_ATTR(bulk, count, sa_table[ZPL_CTIME], NULL, &sb->zs_ctime, sizeof (sb->zs_ctime)); return (sa_bulk_lookup(hdl, bulk, count)); } static int zfs_obj_to_path_impl(objset_t *osp, uint64_t obj, sa_handle_t *hdl, sa_attr_type_t *sa_table, char *buf, int len) { sa_handle_t *sa_hdl; sa_handle_t *prevhdl = NULL; dmu_buf_t *prevdb = NULL; dmu_buf_t *sa_db = NULL; char *path = buf + len - 1; int error; *path = '\0'; sa_hdl = hdl; for (;;) { uint64_t pobj; char component[MAXNAMELEN + 2]; size_t complen; int is_xattrdir; if (prevdb) zfs_release_sa_handle(prevhdl, prevdb, FTAG); if ((error = zfs_obj_to_pobj(osp, sa_hdl, sa_table, &pobj, &is_xattrdir)) != 0) break; if (pobj == obj) { if (path[0] != '/') *--path = '/'; break; } component[0] = '/'; if (is_xattrdir) { (void) sprintf(component + 1, ""); } else { error = zap_value_search(osp, pobj, obj, ZFS_DIRENT_OBJ(-1ULL), component + 1); if (error != 0) break; } complen = strlen(component); path -= complen; ASSERT(path >= buf); bcopy(component, path, complen); obj = pobj; if (sa_hdl != hdl) { prevhdl = sa_hdl; prevdb = sa_db; } error = zfs_grab_sa_handle(osp, obj, &sa_hdl, &sa_db, FTAG); if (error != 0) { sa_hdl = prevhdl; sa_db = prevdb; break; } } if (sa_hdl != NULL && sa_hdl != hdl) { ASSERT(sa_db != NULL); zfs_release_sa_handle(sa_hdl, sa_db, FTAG); } if (error == 0) (void) memmove(buf, path, buf + len - path); return (error); } int zfs_obj_to_path(objset_t *osp, uint64_t obj, char *buf, int len) { sa_attr_type_t *sa_table; sa_handle_t *hdl; dmu_buf_t *db; int error; error = zfs_sa_setup(osp, &sa_table); if (error != 0) return (error); error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG); if (error != 0) return (error); error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len); zfs_release_sa_handle(hdl, db, FTAG); return (error); } int zfs_obj_to_stats(objset_t *osp, uint64_t obj, zfs_stat_t *sb, char *buf, int len) { char *path = buf + len - 1; sa_attr_type_t *sa_table; sa_handle_t *hdl; dmu_buf_t *db; int error; *path = '\0'; error = zfs_sa_setup(osp, &sa_table); if (error != 0) return (error); error = zfs_grab_sa_handle(osp, obj, &hdl, &db, FTAG); if (error != 0) return (error); error = zfs_obj_to_stats_impl(hdl, sa_table, sb); if (error != 0) { zfs_release_sa_handle(hdl, db, FTAG); return (error); } error = zfs_obj_to_path_impl(osp, obj, hdl, sa_table, buf, len); zfs_release_sa_handle(hdl, db, FTAG); return (error); }