diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c index be2885528570..21ee378b24c6 100644 --- a/sys/fs/fuse/fuse_vnops.c +++ b/sys/fs/fuse/fuse_vnops.c @@ -1,3202 +1,3221 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2007-2009 Google Inc. and Amit Singh * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT * OWNER 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. * * Copyright (C) 2005 Csaba Henk. * All rights reserved. * * Copyright (c) 2019 The FreeBSD Foundation * * Portions of this software were developed by BFF Storage Systems, LLC under * sponsorship from the FreeBSD Foundation. * * 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 AUTHOR 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 AUTHOR 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. */ #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 "fuse.h" #include "fuse_file.h" #include "fuse_internal.h" #include "fuse_ipc.h" #include "fuse_node.h" #include "fuse_io.h" #include /* Maximum number of hardlinks to a single FUSE file */ #define FUSE_LINK_MAX UINT32_MAX SDT_PROVIDER_DECLARE(fusefs); /* * Fuse trace probe: * arg0: verbosity. Higher numbers give more verbose messages * arg1: Textual message */ SDT_PROBE_DEFINE2(fusefs, , vnops, trace, "int", "char*"); /* vnode ops */ static vop_access_t fuse_vnop_access; static vop_advlock_t fuse_vnop_advlock; static vop_allocate_t fuse_vnop_allocate; static vop_bmap_t fuse_vnop_bmap; static vop_close_t fuse_fifo_close; static vop_close_t fuse_vnop_close; static vop_copy_file_range_t fuse_vnop_copy_file_range; static vop_create_t fuse_vnop_create; static vop_deallocate_t fuse_vnop_deallocate; static vop_deleteextattr_t fuse_vnop_deleteextattr; static vop_fdatasync_t fuse_vnop_fdatasync; static vop_fsync_t fuse_vnop_fsync; static vop_getattr_t fuse_vnop_getattr; static vop_getextattr_t fuse_vnop_getextattr; static vop_inactive_t fuse_vnop_inactive; static vop_ioctl_t fuse_vnop_ioctl; static vop_link_t fuse_vnop_link; static vop_listextattr_t fuse_vnop_listextattr; static vop_lookup_t fuse_vnop_lookup; static vop_mkdir_t fuse_vnop_mkdir; static vop_mknod_t fuse_vnop_mknod; static vop_open_t fuse_vnop_open; static vop_pathconf_t fuse_vnop_pathconf; static vop_read_t fuse_vnop_read; static vop_readdir_t fuse_vnop_readdir; static vop_readlink_t fuse_vnop_readlink; static vop_reclaim_t fuse_vnop_reclaim; static vop_remove_t fuse_vnop_remove; static vop_rename_t fuse_vnop_rename; static vop_rmdir_t fuse_vnop_rmdir; static vop_setattr_t fuse_vnop_setattr; static vop_setextattr_t fuse_vnop_setextattr; static vop_strategy_t fuse_vnop_strategy; static vop_symlink_t fuse_vnop_symlink; static vop_write_t fuse_vnop_write; static vop_getpages_t fuse_vnop_getpages; static vop_print_t fuse_vnop_print; static vop_vptofh_t fuse_vnop_vptofh; struct vop_vector fuse_fifoops = { .vop_default = &fifo_specops, .vop_access = fuse_vnop_access, .vop_close = fuse_fifo_close, .vop_fsync = fuse_vnop_fsync, .vop_getattr = fuse_vnop_getattr, .vop_inactive = fuse_vnop_inactive, .vop_pathconf = fuse_vnop_pathconf, .vop_print = fuse_vnop_print, .vop_read = VOP_PANIC, .vop_reclaim = fuse_vnop_reclaim, .vop_setattr = fuse_vnop_setattr, .vop_write = VOP_PANIC, .vop_vptofh = fuse_vnop_vptofh, }; VFS_VOP_VECTOR_REGISTER(fuse_fifoops); struct vop_vector fuse_vnops = { .vop_allocate = fuse_vnop_allocate, .vop_default = &default_vnodeops, .vop_access = fuse_vnop_access, .vop_advlock = fuse_vnop_advlock, .vop_bmap = fuse_vnop_bmap, .vop_close = fuse_vnop_close, .vop_copy_file_range = fuse_vnop_copy_file_range, .vop_create = fuse_vnop_create, .vop_deallocate = fuse_vnop_deallocate, .vop_deleteextattr = fuse_vnop_deleteextattr, .vop_fsync = fuse_vnop_fsync, .vop_fdatasync = fuse_vnop_fdatasync, .vop_getattr = fuse_vnop_getattr, .vop_getextattr = fuse_vnop_getextattr, .vop_inactive = fuse_vnop_inactive, .vop_ioctl = fuse_vnop_ioctl, .vop_link = fuse_vnop_link, .vop_listextattr = fuse_vnop_listextattr, .vop_lookup = fuse_vnop_lookup, .vop_mkdir = fuse_vnop_mkdir, .vop_mknod = fuse_vnop_mknod, .vop_open = fuse_vnop_open, .vop_pathconf = fuse_vnop_pathconf, /* * TODO: implement vop_poll after upgrading to protocol 7.21. * FUSE_POLL was added in protocol 7.11, but it's kind of broken until * 7.21, which adds the ability for the client to choose which poll * events it wants, and for a client to deregister a file handle */ .vop_read = fuse_vnop_read, .vop_readdir = fuse_vnop_readdir, .vop_readlink = fuse_vnop_readlink, .vop_reclaim = fuse_vnop_reclaim, .vop_remove = fuse_vnop_remove, .vop_rename = fuse_vnop_rename, .vop_rmdir = fuse_vnop_rmdir, .vop_setattr = fuse_vnop_setattr, .vop_setextattr = fuse_vnop_setextattr, .vop_strategy = fuse_vnop_strategy, .vop_symlink = fuse_vnop_symlink, .vop_write = fuse_vnop_write, .vop_getpages = fuse_vnop_getpages, .vop_print = fuse_vnop_print, .vop_vptofh = fuse_vnop_vptofh, }; VFS_VOP_VECTOR_REGISTER(fuse_vnops); /* Check permission for extattr operations, much like extattr_check_cred */ static int fuse_extattr_check_cred(struct vnode *vp, int ns, struct ucred *cred, struct thread *td, accmode_t accmode) { struct mount *mp = vnode_mount(vp); struct fuse_data *data = fuse_get_mpdata(mp); int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS; /* * Kernel-invoked always succeeds. */ if (cred == NOCRED) return (0); /* * Do not allow privileged processes in jail to directly manipulate * system attributes. */ switch (ns) { case EXTATTR_NAMESPACE_SYSTEM: if (default_permissions) { return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM)); } return (0); case EXTATTR_NAMESPACE_USER: if (default_permissions) { return (fuse_internal_access(vp, accmode, td, cred)); } return (0); default: return (EPERM); } } /* Get a filehandle for a directory */ static int fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp, struct ucred *cred, pid_t pid) { if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0) return 0; return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid); } /* Send FUSE_FLUSH for this vnode */ static int fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag) { struct fuse_flush_in *ffi; struct fuse_filehandle *fufh; struct fuse_dispatcher fdi; struct thread *td = curthread; struct mount *mp = vnode_mount(vp); int err; if (fsess_not_impl(vnode_mount(vp), FUSE_FLUSH)) return 0; err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid); if (err) return err; fdisp_init(&fdi, sizeof(*ffi)); fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred); ffi = fdi.indata; ffi->fh = fufh->fh_id; /* * If the file has a POSIX lock then we're supposed to set lock_owner. * If not, then lock_owner is undefined. So we may as well always set * it. */ ffi->lock_owner = td->td_proc->p_pid; err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_FLUSH); err = 0; } fdisp_destroy(&fdi); return err; } /* Close wrapper for fifos. */ static int fuse_fifo_close(struct vop_close_args *ap) { return (fifo_specops.vop_close(ap)); } /* Invalidate a range of cached data, whether dirty of not */ static int fuse_inval_buf_range(struct vnode *vp, off_t filesize, off_t start, off_t end) { struct buf *bp; daddr_t left_lbn, end_lbn, right_lbn; off_t new_filesize; int iosize, left_on, right_on, right_blksize; iosize = fuse_iosize(vp); left_lbn = start / iosize; end_lbn = howmany(end, iosize); left_on = start & (iosize - 1); if (left_on != 0) { bp = getblk(vp, left_lbn, iosize, PCATCH, 0, 0); if ((bp->b_flags & B_CACHE) != 0 && bp->b_dirtyend >= left_on) { /* * Flush the dirty buffer, because we don't have a * byte-granular way to record which parts of the * buffer are valid. */ bwrite(bp); if (bp->b_error) return (bp->b_error); } else { brelse(bp); } } right_on = end & (iosize - 1); if (right_on != 0) { right_lbn = end / iosize; new_filesize = MAX(filesize, end); right_blksize = MIN(iosize, new_filesize - iosize * right_lbn); bp = getblk(vp, right_lbn, right_blksize, PCATCH, 0, 0); if ((bp->b_flags & B_CACHE) != 0 && bp->b_dirtyoff < right_on) { /* * Flush the dirty buffer, because we don't have a * byte-granular way to record which parts of the * buffer are valid. */ bwrite(bp); if (bp->b_error) return (bp->b_error); } else { brelse(bp); } } v_inval_buf_range(vp, left_lbn, end_lbn, iosize); return (0); } /* Send FUSE_LSEEK for this node */ static int fuse_vnop_do_lseek(struct vnode *vp, struct thread *td, struct ucred *cred, pid_t pid, off_t *offp, int whence) { struct fuse_dispatcher fdi; struct fuse_filehandle *fufh; struct fuse_lseek_in *flsi; struct fuse_lseek_out *flso; struct mount *mp = vnode_mount(vp); int err; ASSERT_VOP_LOCKED(vp, __func__); err = fuse_filehandle_getrw(vp, FREAD, &fufh, cred, pid); if (err) return (err); fdisp_init(&fdi, sizeof(*flsi)); fdisp_make_vp(&fdi, FUSE_LSEEK, vp, td, cred); flsi = fdi.indata; flsi->fh = fufh->fh_id; flsi->offset = *offp; flsi->whence = whence; err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_LSEEK); } else if (err == 0) { fsess_set_impl(mp, FUSE_LSEEK); flso = fdi.answ; *offp = flso->offset; } fdisp_destroy(&fdi); return (err); } /* struct vnop_access_args { struct vnode *a_vp; #if VOP_ACCESS_TAKES_ACCMODE_T accmode_t a_accmode; #else int a_mode; #endif struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_access(struct vop_access_args *ap) { struct vnode *vp = ap->a_vp; int accmode = ap->a_accmode; struct ucred *cred = ap->a_cred; struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp)); int err; if (fuse_isdeadfs(vp)) { if (vnode_isvroot(vp)) { return 0; } return ENXIO; } if (!(data->dataflags & FSESS_INITED)) { if (vnode_isvroot(vp)) { if (priv_check_cred(cred, PRIV_VFS_ADMIN) || (fuse_match_cred(data->daemoncred, cred) == 0)) { return 0; } } return EBADF; } if (vnode_islnk(vp)) { return 0; } err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred); return err; } /* * struct vop_advlock_args { * struct vop_generic_args a_gen; * struct vnode *a_vp; * void *a_id; * int a_op; * struct flock *a_fl; * int a_flags; * } */ static int fuse_vnop_advlock(struct vop_advlock_args *ap) { struct vnode *vp = ap->a_vp; struct flock *fl = ap->a_fl; struct thread *td = curthread; struct ucred *cred = td->td_ucred; pid_t pid = td->td_proc->p_pid; struct fuse_filehandle *fufh; struct fuse_dispatcher fdi; struct fuse_lk_in *fli; struct fuse_lk_out *flo; struct vattr vattr; enum fuse_opcode op; off_t size, start; int dataflags, err; int flags = ap->a_flags; dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags; if (fuse_isdeadfs(vp)) { return ENXIO; } switch(ap->a_op) { case F_GETLK: op = FUSE_GETLK; break; case F_SETLK: if (flags & F_WAIT) op = FUSE_SETLKW; else op = FUSE_SETLK; break; case F_UNLCK: op = FUSE_SETLK; break; default: return EINVAL; } if (!(dataflags & FSESS_POSIX_LOCKS)) return vop_stdadvlock(ap); /* FUSE doesn't properly support flock until protocol 7.17 */ if (flags & F_FLOCK) return vop_stdadvlock(ap); vn_lock(vp, LK_SHARED | LK_RETRY); switch (fl->l_whence) { case SEEK_SET: case SEEK_CUR: /* * Caller is responsible for adding any necessary offset * when SEEK_CUR is used. */ start = fl->l_start; break; case SEEK_END: err = fuse_internal_getattr(vp, &vattr, cred, td); if (err) goto out; size = vattr.va_size; if (size > OFF_MAX || (fl->l_start > 0 && size > OFF_MAX - fl->l_start)) { err = EOVERFLOW; goto out; } start = size + fl->l_start; break; default: return (EINVAL); } err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid); if (err) goto out; fdisp_init(&fdi, sizeof(*fli)); fdisp_make_vp(&fdi, op, vp, td, cred); fli = fdi.indata; fli->fh = fufh->fh_id; fli->owner = td->td_proc->p_pid; fli->lk.start = start; if (fl->l_len != 0) fli->lk.end = start + fl->l_len - 1; else fli->lk.end = INT64_MAX; fli->lk.type = fl->l_type; fli->lk.pid = td->td_proc->p_pid; err = fdisp_wait_answ(&fdi); fdisp_destroy(&fdi); if (err == 0 && op == FUSE_GETLK) { flo = fdi.answ; fl->l_type = flo->lk.type; fl->l_whence = SEEK_SET; if (flo->lk.type != F_UNLCK) { fl->l_pid = flo->lk.pid; fl->l_start = flo->lk.start; if (flo->lk.end == INT64_MAX) fl->l_len = 0; else fl->l_len = flo->lk.end - flo->lk.start + 1; fl->l_start = flo->lk.start; } } out: VOP_UNLOCK(vp); return err; } static int fuse_vnop_allocate(struct vop_allocate_args *ap) { struct vnode *vp = ap->a_vp; off_t *len = ap->a_len; off_t *offset = ap->a_offset; struct ucred *cred = ap->a_cred; struct fuse_filehandle *fufh; struct mount *mp = vnode_mount(vp); struct fuse_dispatcher fdi; struct fuse_fallocate_in *ffi; struct uio io; pid_t pid = curthread->td_proc->p_pid; struct fuse_vnode_data *fvdat = VTOFUD(vp); off_t filesize; int err; if (fuse_isdeadfs(vp)) return (ENXIO); switch (vp->v_type) { case VFIFO: return (ESPIPE); case VLNK: case VREG: if (vfs_isrdonly(mp)) return (EROFS); break; default: return (ENODEV); } if (vfs_isrdonly(mp)) return (EROFS); if (fsess_not_impl(mp, FUSE_FALLOCATE)) return (EINVAL); io.uio_offset = *offset; io.uio_resid = *len; err = vn_rlimit_fsize(vp, &io, curthread); if (err) return (err); err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); if (err) return (err); fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE); err = fuse_vnode_size(vp, &filesize, cred, curthread); if (err) return (err); fuse_inval_buf_range(vp, filesize, *offset, *offset + *len); fdisp_init(&fdi, sizeof(*ffi)); fdisp_make_vp(&fdi, FUSE_FALLOCATE, vp, curthread, cred); ffi = fdi.indata; ffi->fh = fufh->fh_id; ffi->offset = *offset; ffi->length = *len; ffi->mode = 0; err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_FALLOCATE); err = EINVAL; } else if (err == EOPNOTSUPP) { /* * The file system server does not support FUSE_FALLOCATE with * the supplied mode for this particular file. */ err = EINVAL; } else if (!err) { *offset += *len; *len = 0; fuse_vnode_undirty_cached_timestamps(vp, false); fuse_internal_clear_suid_on_write(vp, cred, curthread); if (*offset > fvdat->cached_attrs.va_size) { fuse_vnode_setsize(vp, *offset, false); getnanouptime(&fvdat->last_local_modify); } } fdisp_destroy(&fdi); return (err); } /* { struct vnode *a_vp; daddr_t a_bn; struct bufobj **a_bop; daddr_t *a_bnp; int *a_runp; int *a_runb; } */ static int fuse_vnop_bmap(struct vop_bmap_args *ap) { struct vnode *vp = ap->a_vp; struct bufobj **bo = ap->a_bop; struct thread *td = curthread; struct mount *mp; struct fuse_dispatcher fdi; struct fuse_bmap_in *fbi; struct fuse_bmap_out *fbo; struct fuse_data *data; struct fuse_vnode_data *fvdat = VTOFUD(vp); uint64_t biosize; off_t fsize; daddr_t lbn = ap->a_bn; daddr_t *pbn = ap->a_bnp; int *runp = ap->a_runp; int *runb = ap->a_runb; int error = 0; int maxrun; if (fuse_isdeadfs(vp)) { return ENXIO; } mp = vnode_mount(vp); data = fuse_get_mpdata(mp); biosize = fuse_iosize(vp); maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1, data->max_readahead_blocks); if (bo != NULL) *bo = &vp->v_bufobj; /* * The FUSE_BMAP operation does not include the runp and runb * variables, so we must guess. Report nonzero contiguous runs so * cluster_read will combine adjacent reads. It's worthwhile to reduce * upcalls even if we don't know the true physical layout of the file. * * FUSE file systems may opt out of read clustering in two ways: * * mounting with -onoclusterr * * Setting max_readahead <= maxbcachebuf during FUSE_INIT */ if (runb != NULL) *runb = MIN(lbn, maxrun); if (runp != NULL && maxrun == 0) *runp = 0; else if (runp != NULL) { /* * If the file's size is cached, use that value to calculate * runp, even if the cache is expired. runp is only advisory, * and the risk of getting it wrong is not worth the cost of * another upcall. */ if (fvdat->cached_attrs.va_size != VNOVAL) fsize = fvdat->cached_attrs.va_size; else error = fuse_vnode_size(vp, &fsize, td->td_ucred, td); if (error == 0) *runp = MIN(MAX(0, fsize / (off_t)biosize - lbn - 1), maxrun); else *runp = 0; } if (fsess_maybe_impl(mp, FUSE_BMAP)) { fdisp_init(&fdi, sizeof(*fbi)); fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred); fbi = fdi.indata; fbi->block = lbn; fbi->blocksize = biosize; error = fdisp_wait_answ(&fdi); if (error == ENOSYS) { fdisp_destroy(&fdi); fsess_set_notimpl(mp, FUSE_BMAP); error = 0; } else { fbo = fdi.answ; if (error == 0 && pbn != NULL) *pbn = fbo->block; fdisp_destroy(&fdi); return error; } } /* If the daemon doesn't support BMAP, make up a sensible default */ if (pbn != NULL) *pbn = lbn * btodb(biosize); return (error); } /* struct vop_close_args { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_close(struct vop_close_args *ap) { struct vnode *vp = ap->a_vp; + struct mount *mp = vnode_mount(vp); struct ucred *cred = ap->a_cred; int fflag = ap->a_fflag; struct thread *td = ap->a_td; pid_t pid = td->td_proc->p_pid; struct fuse_vnode_data *fvdat = VTOFUD(vp); int err = 0; if (fuse_isdeadfs(vp)) return 0; if (vnode_isdir(vp)) return 0; if (fflag & IO_NDELAY) return 0; err = fuse_flush(vp, cred, pid, fflag); - if (err == 0 && (fvdat->flag & FN_ATIMECHANGE)) { + if (err == 0 && (fvdat->flag & FN_ATIMECHANGE) && !vfs_isrdonly(mp)) { struct vattr vap; + struct fuse_data *data; + int dataflags; + int access_e = 0; - VATTR_NULL(&vap); - vap.va_atime = fvdat->cached_attrs.va_atime; - err = fuse_internal_setattr(vp, &vap, td, NULL); + data = fuse_get_mpdata(mp); + dataflags = data->dataflags; + if (dataflags & FSESS_DEFAULT_PERMISSIONS) { + struct vattr va; + + fuse_internal_getattr(vp, &va, cred, td); + access_e = vaccess(vp->v_type, va.va_mode, va.va_uid, + va.va_gid, VWRITE, cred); + } + if (access_e == 0) { + VATTR_NULL(&vap); + vap.va_atime = fvdat->cached_attrs.va_atime; + /* + * Ignore errors setting when setting atime. That + * should not cause close(2) to fail. + */ + fuse_internal_setattr(vp, &vap, td, NULL); + } } /* TODO: close the file handle, if we're sure it's no longer used */ if ((fvdat->flag & FN_SIZECHANGE) != 0) { fuse_vnode_savesize(vp, cred, td->td_proc->p_pid); } return err; } /* struct vop_copy_file_range_args { struct vop_generic_args a_gen; struct vnode *a_invp; off_t *a_inoffp; struct vnode *a_outvp; off_t *a_outoffp; size_t *a_lenp; unsigned int a_flags; struct ucred *a_incred; struct ucred *a_outcred; struct thread *a_fsizetd; } */ static int fuse_vnop_copy_file_range(struct vop_copy_file_range_args *ap) { struct vnode *invp = ap->a_invp; struct vnode *outvp = ap->a_outvp; struct mount *mp = vnode_mount(invp); struct fuse_vnode_data *outfvdat = VTOFUD(outvp); struct fuse_dispatcher fdi; struct fuse_filehandle *infufh, *outfufh; struct fuse_copy_file_range_in *fcfri; struct ucred *incred = ap->a_incred; struct ucred *outcred = ap->a_outcred; struct fuse_write_out *fwo; struct thread *td; struct uio io; off_t outfilesize; ssize_t r = 0; pid_t pid; int err; if (mp != vnode_mount(outvp)) goto fallback; if (incred->cr_uid != outcred->cr_uid) goto fallback; if (incred->cr_groups[0] != outcred->cr_groups[0]) goto fallback; if (fsess_not_impl(mp, FUSE_COPY_FILE_RANGE)) goto fallback; if (ap->a_fsizetd == NULL) td = curthread; else td = ap->a_fsizetd; pid = td->td_proc->p_pid; /* Lock both vnodes, avoiding risk of deadlock. */ do { err = vn_lock(outvp, LK_EXCLUSIVE); if (invp == outvp) break; if (err == 0) { err = vn_lock(invp, LK_SHARED | LK_NOWAIT); if (err == 0) break; VOP_UNLOCK(outvp); err = vn_lock(invp, LK_SHARED); if (err == 0) VOP_UNLOCK(invp); } } while (err == 0); if (err != 0) return (err); err = fuse_filehandle_getrw(invp, FREAD, &infufh, incred, pid); if (err) goto unlock; err = fuse_filehandle_getrw(outvp, FWRITE, &outfufh, outcred, pid); if (err) goto unlock; io.uio_resid = *ap->a_lenp; if (ap->a_fsizetd) { io.uio_offset = *ap->a_outoffp; err = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd); if (err != 0) goto unlock; } err = fuse_vnode_size(outvp, &outfilesize, outcred, curthread); if (err) goto unlock; err = fuse_inval_buf_range(outvp, outfilesize, *ap->a_outoffp, *ap->a_outoffp + io.uio_resid); if (err) goto unlock; fdisp_init(&fdi, sizeof(*fcfri)); fdisp_make_vp(&fdi, FUSE_COPY_FILE_RANGE, invp, td, incred); fcfri = fdi.indata; fcfri->fh_in = infufh->fh_id; fcfri->off_in = *ap->a_inoffp; fcfri->nodeid_out = VTOI(outvp); fcfri->fh_out = outfufh->fh_id; fcfri->off_out = *ap->a_outoffp; fcfri->len = io.uio_resid; fcfri->flags = 0; err = fdisp_wait_answ(&fdi); if (err == 0) { fwo = fdi.answ; *ap->a_lenp = fwo->size; *ap->a_inoffp += fwo->size; *ap->a_outoffp += fwo->size; fuse_internal_clear_suid_on_write(outvp, outcred, td); if (*ap->a_outoffp > outfvdat->cached_attrs.va_size) { fuse_vnode_setsize(outvp, *ap->a_outoffp, false); getnanouptime(&outfvdat->last_local_modify); } fuse_vnode_update(invp, FN_ATIMECHANGE); fuse_vnode_update(outvp, FN_MTIMECHANGE | FN_CTIMECHANGE); } fdisp_destroy(&fdi); unlock: if (invp != outvp) VOP_UNLOCK(invp); VOP_UNLOCK(outvp); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_COPY_FILE_RANGE); fallback: err = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred, ap->a_outcred, ap->a_fsizetd); } /* * No need to call vn_rlimit_fsizex_res before return, since the uio is * local. */ return (err); } static void fdisp_make_mknod_for_fallback( struct fuse_dispatcher *fdip, struct componentname *cnp, struct vnode *dvp, uint64_t parentnid, struct thread *td, struct ucred *cred, mode_t mode, enum fuse_opcode *op) { struct fuse_mknod_in *fmni; fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1); *op = FUSE_MKNOD; fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred); fmni = fdip->indata; fmni->mode = mode; fmni->rdev = 0; memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr, cnp->cn_namelen); ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0'; } /* struct vnop_create_args { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; }; */ static int fuse_vnop_create(struct vop_create_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; struct componentname *cnp = ap->a_cnp; struct vattr *vap = ap->a_vap; struct thread *td = curthread; struct ucred *cred = cnp->cn_cred; struct fuse_data *data; struct fuse_create_in *fci; struct fuse_entry_out *feo; struct fuse_open_out *foo; struct fuse_dispatcher fdi, fdi2; struct fuse_dispatcher *fdip = &fdi; struct fuse_dispatcher *fdip2 = NULL; int err; struct mount *mp = vnode_mount(dvp); data = fuse_get_mpdata(mp); uint64_t parentnid = VTOFUD(dvp)->nid; mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode); enum fuse_opcode op; int flags; if (fuse_isdeadfs(dvp)) return ENXIO; /* FUSE expects sockets to be created with FUSE_MKNOD */ if (vap->va_type == VSOCK) return fuse_internal_mknod(dvp, vpp, cnp, vap); /* * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a * writable mode makes sense, and we might as well include readability * too. */ flags = O_RDWR; bzero(&fdi, sizeof(fdi)); if (vap->va_type != VREG) return (EINVAL); if (fsess_not_impl(mp, FUSE_CREATE) || vap->va_type == VSOCK) { /* Fallback to FUSE_MKNOD/FUSE_OPEN */ fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td, cred, mode, &op); } else { /* Use FUSE_CREATE */ size_t insize; op = FUSE_CREATE; fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1); fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred); fci = fdip->indata; fci->mode = mode; fci->flags = O_CREAT | flags; if (fuse_libabi_geq(data, 7, 12)) { insize = sizeof(*fci); fci->umask = td->td_proc->p_pd->pd_cmask; } else { insize = sizeof(struct fuse_open_in); } memcpy((char *)fdip->indata + insize, cnp->cn_nameptr, cnp->cn_namelen); ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0'; } err = fdisp_wait_answ(fdip); if (err) { if (err == ENOSYS && op == FUSE_CREATE) { fsess_set_notimpl(mp, FUSE_CREATE); fdisp_destroy(fdip); fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td, cred, mode, &op); err = fdisp_wait_answ(fdip); } if (err) goto out; } feo = fdip->answ; if ((err = fuse_internal_checkentry(feo, vap->va_type))) { goto out; } if (op == FUSE_CREATE) { if (fuse_libabi_geq(data, 7, 9)) foo = (struct fuse_open_out*)(feo + 1); else foo = (struct fuse_open_out*)((char*)feo + FUSE_COMPAT_ENTRY_OUT_SIZE); } else { /* Issue a separate FUSE_OPEN */ struct fuse_open_in *foi; fdip2 = &fdi2; fdisp_init(fdip2, sizeof(*foi)); fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td, cred); foi = fdip2->indata; foi->flags = flags; err = fdisp_wait_answ(fdip2); if (err) goto out; foo = fdip2->answ; } err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type); if (err) { struct fuse_release_in *fri; uint64_t nodeid = feo->nodeid; uint64_t fh_id = foo->fh; fdisp_destroy(fdip); fdisp_init(fdip, sizeof(*fri)); fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred); fri = fdip->indata; fri->fh = fh_id; fri->flags = flags; fuse_insert_callback(fdip->tick, fuse_internal_forget_callback); fuse_insert_message(fdip->tick, false); goto out; } ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create"); fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, feo->attr_valid_nsec, NULL, true); fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo); fuse_vnode_open(*vpp, foo->open_flags, td); /* * Purge the parent's attribute cache because the daemon should've * updated its mtime and ctime */ fuse_vnode_clear_attr_cache(dvp); cache_purge_negative(dvp); out: if (fdip2) fdisp_destroy(fdip2); fdisp_destroy(fdip); return err; } /* struct vnop_fdatasync_args { struct vop_generic_args a_gen; struct vnode * a_vp; struct thread * a_td; }; */ static int fuse_vnop_fdatasync(struct vop_fdatasync_args *ap) { struct vnode *vp = ap->a_vp; struct thread *td = ap->a_td; int waitfor = MNT_WAIT; int err = 0; if (fuse_isdeadfs(vp)) { return 0; } if ((err = vop_stdfdatasync_buf(ap))) return err; return fuse_internal_fsync(vp, td, waitfor, true); } /* struct vnop_fsync_args { struct vop_generic_args a_gen; struct vnode * a_vp; int a_waitfor; struct thread * a_td; }; */ static int fuse_vnop_fsync(struct vop_fsync_args *ap) { struct vnode *vp = ap->a_vp; struct thread *td = ap->a_td; int waitfor = ap->a_waitfor; int err = 0; if (fuse_isdeadfs(vp)) { return 0; } if ((err = vop_stdfsync(ap))) return err; return fuse_internal_fsync(vp, td, waitfor, false); } /* struct vnop_getattr_args { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_getattr(struct vop_getattr_args *ap) { struct vnode *vp = ap->a_vp; struct vattr *vap = ap->a_vap; struct ucred *cred = ap->a_cred; struct thread *td = curthread; int err = 0; int dataflags; dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags; /* Note that we are not bailing out on a dead file system just yet. */ if (!(dataflags & FSESS_INITED)) { if (!vnode_isvroot(vp)) { fdata_set_dead(fuse_get_mpdata(vnode_mount(vp))); err = ENOTCONN; return err; } else { goto fake; } } err = fuse_internal_getattr(vp, vap, cred, td); if (err == ENOTCONN && vnode_isvroot(vp)) { /* see comment in fuse_vfsop_statfs() */ goto fake; } else { return err; } fake: bzero(vap, sizeof(*vap)); vap->va_type = vnode_vtype(vp); return 0; } /* struct vnop_inactive_args { struct vnode *a_vp; }; */ static int fuse_vnop_inactive(struct vop_inactive_args *ap) { struct vnode *vp = ap->a_vp; struct thread *td = curthread; struct fuse_vnode_data *fvdat = VTOFUD(vp); struct fuse_filehandle *fufh, *fufh_tmp; int need_flush = 1; LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { if (need_flush && vp->v_type == VREG) { if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) { fuse_vnode_savesize(vp, NULL, 0); } if ((fvdat->flag & FN_REVOKED) != 0) fuse_io_invalbuf(vp, td); else fuse_io_flushbuf(vp, MNT_WAIT, td); need_flush = 0; } fuse_filehandle_close(vp, fufh, td, NULL); } if ((fvdat->flag & FN_REVOKED) != 0) vrecycle(vp); return 0; } /* struct vnop_ioctl_args { struct vnode *a_vp; u_long a_command; caddr_t a_data; int a_fflag; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_ioctl(struct vop_ioctl_args *ap) { struct vnode *vp = ap->a_vp; struct mount *mp = vnode_mount(vp); struct ucred *cred = ap->a_cred; off_t *offp; pid_t pid = ap->a_td->td_proc->p_pid; int err; switch (ap->a_command) { case FIOSEEKDATA: case FIOSEEKHOLE: /* Call FUSE_LSEEK, if we can, or fall back to vop_stdioctl */ if (fsess_maybe_impl(mp, FUSE_LSEEK)) { int whence; offp = ap->a_data; if (ap->a_command == FIOSEEKDATA) whence = SEEK_DATA; else whence = SEEK_HOLE; vn_lock(vp, LK_SHARED | LK_RETRY); err = fuse_vnop_do_lseek(vp, ap->a_td, cred, pid, offp, whence); VOP_UNLOCK(vp); } if (fsess_not_impl(mp, FUSE_LSEEK)) err = vop_stdioctl(ap); break; default: /* TODO: implement FUSE_IOCTL */ err = ENOTTY; break; } return (err); } /* struct vnop_link_args { struct vnode *a_tdvp; struct vnode *a_vp; struct componentname *a_cnp; }; */ static int fuse_vnop_link(struct vop_link_args *ap) { struct vnode *vp = ap->a_vp; struct vnode *tdvp = ap->a_tdvp; struct componentname *cnp = ap->a_cnp; struct vattr *vap = VTOVA(vp); struct fuse_dispatcher fdi; struct fuse_entry_out *feo; struct fuse_link_in fli; int err; if (fuse_isdeadfs(vp)) { return ENXIO; } if (vnode_mount(tdvp) != vnode_mount(vp)) { return EXDEV; } /* * This is a seatbelt check to protect naive userspace filesystems from * themselves and the limitations of the FUSE IPC protocol. If a * filesystem does not allow attribute caching, assume it is capable of * validating that nlink does not overflow. */ if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX) return EMLINK; fli.oldnodeid = VTOI(vp); fdisp_init(&fdi, 0); fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp, FUSE_LINK, &fli, sizeof(fli), &fdi); if ((err = fdisp_wait_answ(&fdi))) { goto out; } feo = fdi.answ; if (fli.oldnodeid != feo->nodeid) { struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp)); fuse_warn(data, FSESS_WARN_ILLEGAL_INODE, "Assigned wrong inode for a hard link."); fuse_vnode_clear_attr_cache(vp); fuse_vnode_clear_attr_cache(tdvp); err = EIO; goto out; } err = fuse_internal_checkentry(feo, vnode_vtype(vp)); if (!err) { /* * Purge the parent's attribute cache because the daemon * should've updated its mtime and ctime */ fuse_vnode_clear_attr_cache(tdvp); fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid, feo->attr_valid_nsec, NULL, true); } out: fdisp_destroy(&fdi); return err; } struct fuse_lookup_alloc_arg { struct fuse_entry_out *feo; struct componentname *cnp; uint64_t nid; __enum_uint8(vtype) vtyp; }; /* Callback for vn_get_ino */ static int fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp) { struct fuse_lookup_alloc_arg *flaa = arg; return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp, flaa->vtyp); } SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup, "int", "struct timespec*", "struct timespec*"); /* struct vnop_lookup_args { struct vnodeop_desc *a_desc; struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; }; */ int fuse_vnop_lookup(struct vop_lookup_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; struct componentname *cnp = ap->a_cnp; struct thread *td = curthread; struct ucred *cred = cnp->cn_cred; struct timespec now; int nameiop = cnp->cn_nameiop; int flags = cnp->cn_flags; int islastcn = flags & ISLASTCN; struct mount *mp = vnode_mount(dvp); struct fuse_data *data = fuse_get_mpdata(mp); int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS; bool is_dot; int err = 0; int lookup_err = 0; struct vnode *vp = NULL; struct fuse_dispatcher fdi; bool did_lookup = false; struct fuse_entry_out *feo = NULL; __enum_uint8(vtype) vtyp; /* vnode type of target */ uint64_t nid; if (fuse_isdeadfs(dvp)) { *vpp = NULL; return ENXIO; } if (!vnode_isdir(dvp)) return ENOTDIR; if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP)) return EROFS; if ((cnp->cn_flags & NOEXECCHECK) != 0) cnp->cn_flags &= ~NOEXECCHECK; else if ((err = fuse_internal_access(dvp, VEXEC, td, cred))) return err; is_dot = cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.'; if ((flags & ISDOTDOT) && !(data->dataflags & FSESS_EXPORT_SUPPORT)) { if (!(VTOFUD(dvp)->flag & FN_PARENT_NID)) { /* * Since the file system doesn't support ".." lookups, * we have no way to find this entry. */ return ESTALE; } nid = VTOFUD(dvp)->parent_nid; if (nid == 0) return ENOENT; /* .. is obviously a directory */ vtyp = VDIR; } else if (is_dot) { nid = VTOI(dvp); /* . is obviously a directory */ vtyp = VDIR; } else { struct timespec timeout; int ncpticks; /* here to accommodate for API contract */ err = cache_lookup(dvp, vpp, cnp, &timeout, &ncpticks); getnanouptime(&now); SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now); switch (err) { case -1: /* positive match */ if (timespeccmp(&timeout, &now, >)) { counter_u64_add(fuse_lookup_cache_hits, 1); } else { /* Cache timeout */ counter_u64_add(fuse_lookup_cache_misses, 1); bintime_clear( &VTOFUD(*vpp)->entry_cache_timeout); cache_purge(*vpp); if (dvp != *vpp) vput(*vpp); else vrele(*vpp); *vpp = NULL; break; } return 0; case 0: /* no match in cache */ counter_u64_add(fuse_lookup_cache_misses, 1); break; case ENOENT: /* negative match */ if (timespeccmp(&timeout, &now, <=)) { /* Cache timeout */ cache_purge_negative(dvp); break; } /* fall through */ default: return err; } fdisp_init(&fdi, cnp->cn_namelen + 1); fdisp_make(&fdi, FUSE_LOOKUP, mp, VTOI(dvp), td, cred); memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; lookup_err = fdisp_wait_answ(&fdi); did_lookup = true; if (!lookup_err) { /* lookup call succeeded */ feo = (struct fuse_entry_out *)fdi.answ; nid = feo->nodeid; if (nid == 0) { /* zero nodeid means ENOENT and cache it */ struct timespec timeout; fdi.answ_stat = ENOENT; lookup_err = ENOENT; if (cnp->cn_flags & MAKEENTRY) { fuse_validity_2_timespec(feo, &timeout); /* Use the same entry_time for .. as for * the file itself. That doesn't honor * exactly what the fuse server tells * us, but to do otherwise would require * another cache lookup at this point. */ struct timespec *dtsp = NULL; cache_enter_time(dvp, *vpp, cnp, &timeout, dtsp); } } vtyp = IFTOVT(feo->attr.mode); } if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) { fdisp_destroy(&fdi); return lookup_err; } } /* lookup_err, if non-zero, must be ENOENT at this point */ if (lookup_err) { /* Entry not found */ if ((nameiop == CREATE || nameiop == RENAME) && islastcn) { if (default_permissions) err = fuse_internal_access(dvp, VWRITE, td, cred); else err = 0; if (!err) { err = EJUSTRETURN; } } else { err = ENOENT; } } else { /* Entry was found */ if (flags & ISDOTDOT) { struct fuse_lookup_alloc_arg flaa; flaa.nid = nid; flaa.feo = feo; flaa.cnp = cnp; flaa.vtyp = vtyp; err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0, &vp); *vpp = vp; } else if (nid == VTOI(dvp)) { if (is_dot) { vref(dvp); *vpp = dvp; } else { fuse_warn(fuse_get_mpdata(mp), FSESS_WARN_ILLEGAL_INODE, "Assigned same inode to both parent and " "child."); err = EIO; } } else { struct fuse_vnode_data *fvdat; err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp, &vp, cnp, vtyp); if (err) goto out; *vpp = vp; fvdat = VTOFUD(vp); MPASS(feo != NULL); if (timespeccmp(&now, &fvdat->last_local_modify, >)) { /* * Attributes from the server are definitely * newer than the last attributes we sent to * the server, so cache them. */ fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, feo->attr_valid_nsec, NULL, true); } fuse_validity_2_bintime(feo->entry_valid, feo->entry_valid_nsec, &fvdat->entry_cache_timeout); if ((nameiop == DELETE || nameiop == RENAME) && islastcn && default_permissions) { struct vattr dvattr; err = fuse_internal_access(dvp, VWRITE, td, cred); if (err != 0) goto out; /* * if the parent's sticky bit is set, check * whether we're allowed to remove the file. * Need to figure out the vnode locking to make * this work. */ fuse_internal_getattr(dvp, &dvattr, cred, td); if ((dvattr.va_mode & S_ISTXT) && fuse_internal_access(dvp, VADMIN, td, cred) && fuse_internal_access(*vpp, VADMIN, td, cred)) { err = EPERM; goto out; } } } } out: if (err) { if (vp != NULL && dvp != vp) vput(vp); else if (vp != NULL) vrele(vp); *vpp = NULL; } if (did_lookup) fdisp_destroy(&fdi); return err; } /* struct vnop_mkdir_args { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; }; */ static int fuse_vnop_mkdir(struct vop_mkdir_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; struct componentname *cnp = ap->a_cnp; struct vattr *vap = ap->a_vap; struct fuse_mkdir_in fmdi; if (fuse_isdeadfs(dvp)) { return ENXIO; } fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode); fmdi.umask = curthread->td_proc->p_pd->pd_cmask; return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi, sizeof(fmdi), VDIR)); } /* struct vnop_mknod_args { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; }; */ static int fuse_vnop_mknod(struct vop_mknod_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; struct componentname *cnp = ap->a_cnp; struct vattr *vap = ap->a_vap; if (fuse_isdeadfs(dvp)) return ENXIO; return fuse_internal_mknod(dvp, vpp, cnp, vap); } /* struct vop_open_args { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct thread *a_td; int a_fdidx; / struct file *a_fp; }; */ static int fuse_vnop_open(struct vop_open_args *ap) { struct vnode *vp = ap->a_vp; int a_mode = ap->a_mode; struct thread *td = ap->a_td; struct ucred *cred = ap->a_cred; pid_t pid = td->td_proc->p_pid; if (fuse_isdeadfs(vp)) return ENXIO; if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO) return (EOPNOTSUPP); if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0) return EINVAL; if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) { fuse_vnode_open(vp, 0, td); return 0; } return fuse_filehandle_open(vp, a_mode, NULL, td, cred); } static int fuse_vnop_pathconf(struct vop_pathconf_args *ap) { struct vnode *vp = ap->a_vp; struct mount *mp; switch (ap->a_name) { case _PC_FILESIZEBITS: *ap->a_retval = 64; return (0); case _PC_NAME_MAX: *ap->a_retval = NAME_MAX; return (0); case _PC_LINK_MAX: *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX); return (0); case _PC_SYMLINK_MAX: *ap->a_retval = MAXPATHLEN; return (0); case _PC_NO_TRUNC: *ap->a_retval = 1; return (0); case _PC_MIN_HOLE_SIZE: /* * The FUSE protocol provides no mechanism for a server to * report _PC_MIN_HOLE_SIZE. It's a protocol bug. Instead, * return EINVAL if the server does not support FUSE_LSEEK, or * 1 if it does. */ mp = vnode_mount(vp); if (!fsess_is_impl(mp, FUSE_LSEEK) && !fsess_not_impl(mp, FUSE_LSEEK)) { off_t offset = 0; /* Issue a FUSE_LSEEK to find out if it's implemented */ fuse_vnop_do_lseek(vp, curthread, curthread->td_ucred, curthread->td_proc->p_pid, &offset, SEEK_DATA); } if (fsess_is_impl(mp, FUSE_LSEEK)) { *ap->a_retval = 1; return (0); } else { /* * Probably FUSE_LSEEK is not implemented. It might * be, if the FUSE_LSEEK above returned an error like * EACCES, but in that case we can't tell, so it's * safest to report EINVAL anyway. */ return (EINVAL); } default: return (vop_stdpathconf(ap)); } } SDT_PROBE_DEFINE3(fusefs, , vnops, filehandles_closed, "struct vnode*", "struct uio*", "struct ucred*"); /* struct vnop_read_args { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; }; */ static int fuse_vnop_read(struct vop_read_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; int ioflag = ap->a_ioflag; struct ucred *cred = ap->a_cred; pid_t pid = curthread->td_proc->p_pid; struct fuse_filehandle *fufh; int err; bool closefufh = false, directio; MPASS(vp->v_type == VREG || vp->v_type == VDIR); if (fuse_isdeadfs(vp)) { return ENXIO; } if (VTOFUD(vp)->flag & FN_DIRECTIO) { ioflag |= IO_DIRECT; } err = fuse_filehandle_getrw(vp, FREAD, &fufh, cred, pid); if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) { /* * nfsd will do I/O without first doing VOP_OPEN. We * must implicitly open the file here */ err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred); closefufh = true; } if (err) { SDT_PROBE3(fusefs, , vnops, filehandles_closed, vp, uio, cred); return err; } /* * Ideally, when the daemon asks for direct io at open time, the * standard file flag should be set according to this, so that would * just change the default mode, which later on could be changed via * fcntl(2). * But this doesn't work, the O_DIRECT flag gets cleared at some point * (don't know where). So to make any use of the Fuse direct_io option, * we hardwire it into the file's private data (similarly to Linux, * btw.). */ directio = (ioflag & IO_DIRECT) || !fsess_opt_datacache(vnode_mount(vp)); fuse_vnode_update(vp, FN_ATIMECHANGE); if (directio) { SDT_PROBE2(fusefs, , vnops, trace, 1, "direct read of vnode"); err = fuse_read_directbackend(vp, uio, cred, fufh); } else { SDT_PROBE2(fusefs, , vnops, trace, 1, "buffered read of vnode"); err = fuse_read_biobackend(vp, uio, ioflag, cred, fufh, pid); } if (closefufh) fuse_filehandle_close(vp, fufh, curthread, cred); return (err); } /* struct vnop_readdir_args { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; int *a_eofflag; int *a_ncookies; uint64_t **a_cookies; }; */ static int fuse_vnop_readdir(struct vop_readdir_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct ucred *cred = ap->a_cred; struct fuse_filehandle *fufh = NULL; struct mount *mp = vnode_mount(vp); struct fuse_iov cookediov; int err = 0; uint64_t *cookies; ssize_t tresid; int ncookies; bool closefufh = false; pid_t pid = curthread->td_proc->p_pid; if (ap->a_eofflag) *ap->a_eofflag = 0; if (fuse_isdeadfs(vp)) { return ENXIO; } if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */ (uio_resid(uio) < sizeof(struct dirent))) { return EINVAL; } tresid = uio->uio_resid; err = fuse_filehandle_get_dir(vp, &fufh, cred, pid); if (err == EBADF && mp->mnt_flag & MNT_EXPORTED) { KASSERT(fuse_get_mpdata(mp)->dataflags & FSESS_NO_OPENDIR_SUPPORT, ("FUSE file systems that don't set " "FUSE_NO_OPENDIR_SUPPORT should not be exported")); /* * nfsd will do VOP_READDIR without first doing VOP_OPEN. We * must implicitly open the directory here. */ err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred); closefufh = true; } if (err) return (err); if (ap->a_ncookies != NULL) { ncookies = uio->uio_resid / (offsetof(struct dirent, d_name) + 4) + 1; cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); *ap->a_ncookies = ncookies; *ap->a_cookies = cookies; } else { ncookies = 0; cookies = NULL; } #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1) fiov_init(&cookediov, DIRCOOKEDSIZE); err = fuse_internal_readdir(vp, uio, fufh, &cookediov, &ncookies, cookies); fiov_teardown(&cookediov); if (closefufh) fuse_filehandle_close(vp, fufh, curthread, cred); if (ap->a_ncookies != NULL) { if (err == 0) { *ap->a_ncookies -= ncookies; } else { free(*ap->a_cookies, M_TEMP); *ap->a_ncookies = 0; *ap->a_cookies = NULL; } } if (err == 0 && tresid == uio->uio_resid) *ap->a_eofflag = 1; return err; } /* struct vnop_readlink_args { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; }; */ static int fuse_vnop_readlink(struct vop_readlink_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct ucred *cred = ap->a_cred; struct fuse_dispatcher fdi; int err; if (fuse_isdeadfs(vp)) { return ENXIO; } if (!vnode_islnk(vp)) { return EINVAL; } fdisp_init(&fdi, 0); err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred); if (err) { goto out; } if (((char *)fdi.answ)[0] == '/' && fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) { char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname; err = uiomove(mpth, strlen(mpth), uio); } if (!err) { err = uiomove(fdi.answ, fdi.iosize, uio); } out: fdisp_destroy(&fdi); return err; } /* struct vnop_reclaim_args { struct vnode *a_vp; }; */ static int fuse_vnop_reclaim(struct vop_reclaim_args *ap) { struct vnode *vp = ap->a_vp; struct thread *td = curthread; struct fuse_vnode_data *fvdat = VTOFUD(vp); struct fuse_filehandle *fufh, *fufh_tmp; if (!fvdat) { panic("FUSE: no vnode data during recycling"); } LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) { printf("FUSE: vnode being reclaimed with open fufh " "(type=%#x)", fufh->fufh_type); fuse_filehandle_close(vp, fufh, td, NULL); } if (VTOI(vp) == 1) { /* * Don't send FUSE_FORGET for the root inode, because * we never send FUSE_LOOKUP for it (see * fuse_vfsop_root) and we don't want the server to see * mismatched lookup counts. */ struct fuse_data *data; struct vnode *vroot; data = fuse_get_mpdata(vnode_mount(vp)); FUSE_LOCK(); vroot = data->vroot; data->vroot = NULL; FUSE_UNLOCK(); if (vroot) vrele(vroot); } else if (!fuse_isdeadfs(vp) && fvdat->nlookup > 0) { fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp), fvdat->nlookup); } cache_purge(vp); vfs_hash_remove(vp); fuse_vnode_destroy(vp); return 0; } /* struct vnop_remove_args { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; }; */ static int fuse_vnop_remove(struct vop_remove_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode *vp = ap->a_vp; struct componentname *cnp = ap->a_cnp; int err; if (fuse_isdeadfs(vp)) { return ENXIO; } if (vnode_isdir(vp)) { return EPERM; } err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK); return err; } /* struct vnop_rename_args { struct vnode *a_fdvp; struct vnode *a_fvp; struct componentname *a_fcnp; struct vnode *a_tdvp; struct vnode *a_tvp; struct componentname *a_tcnp; }; */ static int fuse_vnop_rename(struct vop_rename_args *ap) { struct vnode *fdvp = ap->a_fdvp; struct vnode *fvp = ap->a_fvp; struct componentname *fcnp = ap->a_fcnp; struct vnode *tdvp = ap->a_tdvp; struct vnode *tvp = ap->a_tvp; struct componentname *tcnp = ap->a_tcnp; struct fuse_data *data; bool newparent = fdvp != tdvp; bool isdir = fvp->v_type == VDIR; int err = 0; if (fuse_isdeadfs(fdvp)) { return ENXIO; } if (fvp->v_mount != tdvp->v_mount || (tvp && fvp->v_mount != tvp->v_mount)) { SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename"); err = EXDEV; goto out; } cache_purge(fvp); /* * FUSE library is expected to check if target directory is not * under the source directory in the file system tree. * Linux performs this check at VFS level. */ /* * If source is a directory, and it will get a new parent, user must * have write permission to it, so ".." can be modified. */ data = fuse_get_mpdata(vnode_mount(tdvp)); if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) { err = fuse_internal_access(fvp, VWRITE, curthread, tcnp->cn_cred); if (err) goto out; } sx_xlock(&data->rename_lock); err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp); if (err == 0) { if (tdvp != fdvp) fuse_vnode_setparent(fvp, tdvp); if (tvp != NULL) fuse_vnode_setparent(tvp, NULL); } sx_unlock(&data->rename_lock); if (tvp != NULL && tvp != fvp) { cache_purge(tvp); } if (vnode_isdir(fvp)) { if (((tvp != NULL) && vnode_isdir(tvp)) || vnode_isdir(fvp)) { cache_purge(tdvp); } cache_purge(fdvp); } out: if (tdvp == tvp) { vrele(tdvp); } else { vput(tdvp); } if (tvp != NULL) { vput(tvp); } vrele(fdvp); vrele(fvp); return err; } /* struct vnop_rmdir_args { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } *ap; */ static int fuse_vnop_rmdir(struct vop_rmdir_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode *vp = ap->a_vp; int err; if (fuse_isdeadfs(vp)) { return ENXIO; } if (VTOFUD(vp) == VTOFUD(dvp)) { return EINVAL; } err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR); return err; } /* struct vnop_setattr_args { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_setattr(struct vop_setattr_args *ap) { struct vnode *vp = ap->a_vp; struct vattr *vap = ap->a_vap; struct ucred *cred = ap->a_cred; struct thread *td = curthread; struct mount *mp; struct fuse_data *data; struct vattr old_va; int dataflags; int err = 0, err2; accmode_t accmode = 0; bool checkperm; bool drop_suid = false; mp = vnode_mount(vp); data = fuse_get_mpdata(mp); dataflags = data->dataflags; checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS; if (fuse_isdeadfs(vp)) { return ENXIO; } if (vap->va_uid != (uid_t)VNOVAL) { if (checkperm) { /* Only root may change a file's owner */ err = priv_check_cred(cred, PRIV_VFS_CHOWN); if (err) { /* As a special case, allow the null chown */ err2 = fuse_internal_getattr(vp, &old_va, cred, td); if (err2) return (err2); if (vap->va_uid != old_va.va_uid) return err; else accmode |= VADMIN; drop_suid = true; } else accmode |= VADMIN; } else accmode |= VADMIN; } if (vap->va_gid != (gid_t)VNOVAL) { if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN)) drop_suid = true; if (checkperm && !groupmember(vap->va_gid, cred)) { /* * Non-root users may only chgrp to one of their own * groups */ err = priv_check_cred(cred, PRIV_VFS_CHOWN); if (err) { /* As a special case, allow the null chgrp */ err2 = fuse_internal_getattr(vp, &old_va, cred, td); if (err2) return (err2); if (vap->va_gid != old_va.va_gid) return err; accmode |= VADMIN; } else accmode |= VADMIN; } else accmode |= VADMIN; } if (vap->va_size != VNOVAL) { switch (vp->v_type) { case VDIR: return (EISDIR); case VLNK: case VREG: if (vfs_isrdonly(mp)) return (EROFS); err = vn_rlimit_trunc(vap->va_size, td); if (err) return (err); break; default: /* * According to POSIX, the result is unspecified * for file types other than regular files, * directories and shared memory objects. We * don't support shared memory objects in the file * system, and have dubious support for truncating * symlinks. Just ignore the request in other cases. */ return (0); } /* Don't set accmode. Permission to trunc is checked upstack */ } if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { if (vap->va_vaflags & VA_UTIMES_NULL) accmode |= VWRITE; else accmode |= VADMIN; } if (drop_suid) { if (vap->va_mode != (mode_t)VNOVAL) vap->va_mode &= ~(S_ISUID | S_ISGID); else { err = fuse_internal_getattr(vp, &old_va, cred, td); if (err) return (err); vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID); } } if (vap->va_mode != (mode_t)VNOVAL) { /* Only root may set the sticky bit on non-directories */ if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT) && priv_check_cred(cred, PRIV_VFS_STICKYFILE)) return EFTYPE; if (checkperm && (vap->va_mode & S_ISGID)) { err = fuse_internal_getattr(vp, &old_va, cred, td); if (err) return (err); if (!groupmember(old_va.va_gid, cred)) { err = priv_check_cred(cred, PRIV_VFS_SETGID); if (err) return (err); } } accmode |= VADMIN; } if (vfs_isrdonly(mp)) return EROFS; if (checkperm) { err = fuse_internal_access(vp, accmode, td, cred); } else { err = 0; } if (err) return err; else return fuse_internal_setattr(vp, vap, td, cred); } /* struct vnop_strategy_args { struct vnode *a_vp; struct buf *a_bp; }; */ static int fuse_vnop_strategy(struct vop_strategy_args *ap) { struct vnode *vp = ap->a_vp; struct buf *bp = ap->a_bp; if (!vp || fuse_isdeadfs(vp)) { bp->b_ioflags |= BIO_ERROR; bp->b_error = ENXIO; bufdone(bp); return 0; } /* * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags. * fuse_io_strategy sets bp's error fields */ (void)fuse_io_strategy(vp, bp); return 0; } /* struct vnop_symlink_args { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; char *a_target; }; */ static int fuse_vnop_symlink(struct vop_symlink_args *ap) { struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; struct componentname *cnp = ap->a_cnp; const char *target = ap->a_target; struct fuse_dispatcher fdi; int err; size_t len; if (fuse_isdeadfs(dvp)) { return ENXIO; } /* * Unlike the other creator type calls, here we have to create a message * where the name of the new entry comes first, and the data describing * the entry comes second. * Hence we can't rely on our handy fuse_internal_newentry() routine, * but put together the message manually and just call the core part. */ len = strlen(target) + 1; fdisp_init(&fdi, len + cnp->cn_namelen + 1); fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL); memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len); err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi); fdisp_destroy(&fdi); return err; } /* struct vnop_write_args { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; }; */ static int fuse_vnop_write(struct vop_write_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; int ioflag = ap->a_ioflag; struct ucred *cred = ap->a_cred; pid_t pid = curthread->td_proc->p_pid; struct fuse_filehandle *fufh; int err; bool closefufh = false, directio; MPASS(vp->v_type == VREG || vp->v_type == VDIR); if (fuse_isdeadfs(vp)) { return ENXIO; } if (VTOFUD(vp)->flag & FN_DIRECTIO) { ioflag |= IO_DIRECT; } err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) { /* * nfsd will do I/O without first doing VOP_OPEN. We * must implicitly open the file here */ err = fuse_filehandle_open(vp, FWRITE, &fufh, curthread, cred); closefufh = true; } if (err) { SDT_PROBE3(fusefs, , vnops, filehandles_closed, vp, uio, cred); return err; } /* * Ideally, when the daemon asks for direct io at open time, the * standard file flag should be set according to this, so that would * just change the default mode, which later on could be changed via * fcntl(2). * But this doesn't work, the O_DIRECT flag gets cleared at some point * (don't know where). So to make any use of the Fuse direct_io option, * we hardwire it into the file's private data (similarly to Linux, * btw.). */ directio = (ioflag & IO_DIRECT) || !fsess_opt_datacache(vnode_mount(vp)); fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE); if (directio) { off_t start, end, filesize; bool pages = (ioflag & IO_VMIO) != 0; SDT_PROBE2(fusefs, , vnops, trace, 1, "direct write of vnode"); err = fuse_vnode_size(vp, &filesize, cred, curthread); if (err) goto out; start = uio->uio_offset; end = start + uio->uio_resid; if (!pages) { err = fuse_inval_buf_range(vp, filesize, start, end); if (err) goto out; } err = fuse_write_directbackend(vp, uio, cred, fufh, filesize, ioflag, pages); } else { SDT_PROBE2(fusefs, , vnops, trace, 1, "buffered write of vnode"); if (!fsess_opt_writeback(vnode_mount(vp))) ioflag |= IO_SYNC; err = fuse_write_biobackend(vp, uio, cred, fufh, ioflag, pid); } fuse_internal_clear_suid_on_write(vp, cred, uio->uio_td); out: if (closefufh) fuse_filehandle_close(vp, fufh, curthread, cred); return (err); } static daddr_t fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) { const int biosize = fuse_iosize(vp); return (off / biosize); } static int fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *blksz) { off_t filesize; int err; const int biosize = fuse_iosize(vp); err = fuse_vnode_size(vp, &filesize, NULL, NULL); if (err) { /* This will turn into a SIGBUS */ return (EIO); } else if ((off_t)lbn * biosize >= filesize) { *blksz = 0; } else if ((off_t)(lbn + 1) * biosize > filesize) { *blksz = filesize - (off_t)lbn *biosize; } else { *blksz = biosize; } return (0); } /* struct vnop_getpages_args { struct vnode *a_vp; vm_page_t *a_m; int a_count; int a_reqpage; }; */ static int fuse_vnop_getpages(struct vop_getpages_args *ap) { struct vnode *vp = ap->a_vp; if (!fsess_opt_mmap(vnode_mount(vp))) { SDT_PROBE2(fusefs, , vnops, trace, 1, "called on non-cacheable vnode??\n"); return (VM_PAGER_ERROR); } return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind, ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz)); } static const char extattr_namespace_separator = '.'; /* struct vop_getextattr_args { struct vop_generic_args a_gen; struct vnode *a_vp; int a_attrnamespace; const char *a_name; struct uio *a_uio; size_t *a_size; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_getextattr(struct vop_getextattr_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct fuse_dispatcher fdi; struct fuse_getxattr_in *get_xattr_in; struct fuse_getxattr_out *get_xattr_out; struct mount *mp = vnode_mount(vp); struct thread *td = ap->a_td; struct ucred *cred = ap->a_cred; char *prefix; char *attr_str; size_t len; int err; if (fuse_isdeadfs(vp)) return (ENXIO); if (fsess_not_impl(mp, FUSE_GETXATTR)) return EOPNOTSUPP; err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); if (err) return err; /* Default to looking for user attributes. */ if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; else prefix = EXTATTR_NAMESPACE_USER_STRING; len = strlen(prefix) + sizeof(extattr_namespace_separator) + strlen(ap->a_name) + 1; fdisp_init(&fdi, len + sizeof(*get_xattr_in)); fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred); get_xattr_in = fdi.indata; /* * Check to see whether we're querying the available size or * issuing the actual request. If we pass in 0, we get back struct * fuse_getxattr_out. If we pass in a non-zero size, we get back * that much data, without the struct fuse_getxattr_out header. */ if (uio == NULL) get_xattr_in->size = 0; else get_xattr_in->size = uio->uio_resid; attr_str = (char *)fdi.indata + sizeof(*get_xattr_in); snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, ap->a_name); err = fdisp_wait_answ(&fdi); if (err != 0) { if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_GETXATTR); err = EOPNOTSUPP; } goto out; } get_xattr_out = fdi.answ; if (ap->a_size != NULL) *ap->a_size = get_xattr_out->size; if (uio != NULL) err = uiomove(fdi.answ, fdi.iosize, uio); out: fdisp_destroy(&fdi); return (err); } /* struct vop_setextattr_args { struct vop_generic_args a_gen; struct vnode *a_vp; int a_attrnamespace; const char *a_name; struct uio *a_uio; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_setextattr(struct vop_setextattr_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct fuse_dispatcher fdi; struct fuse_setxattr_in *set_xattr_in; struct mount *mp = vnode_mount(vp); struct thread *td = ap->a_td; struct ucred *cred = ap->a_cred; char *prefix; size_t len; char *attr_str; int err; if (fuse_isdeadfs(vp)) return (ENXIO); if (fsess_not_impl(mp, FUSE_SETXATTR)) return EOPNOTSUPP; if (vfs_isrdonly(mp)) return EROFS; /* Deleting xattrs must use VOP_DELETEEXTATTR instead */ if (ap->a_uio == NULL) { /* * If we got here as fallback from VOP_DELETEEXTATTR, then * return EOPNOTSUPP. */ if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) return (EOPNOTSUPP); else return (EINVAL); } err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VWRITE); if (err) return err; /* Default to looking for user attributes. */ if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; else prefix = EXTATTR_NAMESPACE_USER_STRING; len = strlen(prefix) + sizeof(extattr_namespace_separator) + strlen(ap->a_name) + 1; fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid); fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred); set_xattr_in = fdi.indata; set_xattr_in->size = uio->uio_resid; attr_str = (char *)fdi.indata + sizeof(*set_xattr_in); snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, ap->a_name); err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len, uio->uio_resid, uio); if (err != 0) { goto out; } err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_SETXATTR); err = EOPNOTSUPP; } if (err == ERESTART) { /* Can't restart after calling uiomove */ err = EINTR; } out: fdisp_destroy(&fdi); return (err); } /* * The Linux / FUSE extended attribute list is simply a collection of * NUL-terminated strings. The FreeBSD extended attribute list is a single * byte length followed by a non-NUL terminated string. So, this allows * conversion of the Linux / FUSE format to the FreeBSD format in place. * Linux attribute names are reported with the namespace as a prefix (e.g. * "user.attribute_name"), but in FreeBSD they are reported without the * namespace prefix (e.g. "attribute_name"). So, we're going from: * * user.attr_name1\0user.attr_name2\0 * * to: * * attr_name1attr_name2 * * Where "" is a single byte number of characters in the attribute name. * * Args: * prefix - exattr namespace prefix string * list, list_len - input list with namespace prefixes * bsd_list, bsd_list_len - output list compatible with bsd vfs */ static int fuse_xattrlist_convert(char *prefix, const char *list, int list_len, char *bsd_list, int *bsd_list_len) { int len, pos, dist_to_next, prefix_len; pos = 0; *bsd_list_len = 0; prefix_len = strlen(prefix); while (pos < list_len && list[pos] != '\0') { dist_to_next = strlen(&list[pos]) + 1; if (bcmp(&list[pos], prefix, prefix_len) == 0 && list[pos + prefix_len] == extattr_namespace_separator) { len = dist_to_next - (prefix_len + sizeof(extattr_namespace_separator)) - 1; if (len >= EXTATTR_MAXNAMELEN) return (ENAMETOOLONG); bsd_list[*bsd_list_len] = len; memcpy(&bsd_list[*bsd_list_len + 1], &list[pos + prefix_len + sizeof(extattr_namespace_separator)], len); *bsd_list_len += len + 1; } pos += dist_to_next; } return (0); } /* * List extended attributes * * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which * has a number of differences compared to its FreeBSD equivalent, * extattr_list_file: * * - FUSE_LISTXATTR returns all extended attributes across all namespaces, * whereas listxattr(2) only returns attributes for a single namespace * - FUSE_LISTXATTR prepends each attribute name with "namespace." * - If the provided buffer is not large enough to hold the result, * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to * return as many results as will fit. */ /* struct vop_listextattr_args { struct vop_generic_args a_gen; struct vnode *a_vp; int a_attrnamespace; struct uio *a_uio; size_t *a_size; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_listextattr(struct vop_listextattr_args *ap) { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct fuse_dispatcher fdi; struct fuse_listxattr_in *list_xattr_in; struct fuse_listxattr_out *list_xattr_out; struct mount *mp = vnode_mount(vp); struct thread *td = ap->a_td; struct ucred *cred = ap->a_cred; char *prefix; char *bsd_list = NULL; char *linux_list; int bsd_list_len; int linux_list_len; int err; if (fuse_isdeadfs(vp)) return (ENXIO); if (fsess_not_impl(mp, FUSE_LISTXATTR)) return EOPNOTSUPP; err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD); if (err) return err; /* * Add space for a NUL and the period separator if enabled. * Default to looking for user attributes. */ if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; else prefix = EXTATTR_NAMESPACE_USER_STRING; fdisp_init(&fdi, sizeof(*list_xattr_in)); fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); /* * Retrieve Linux / FUSE compatible list size. */ list_xattr_in = fdi.indata; list_xattr_in->size = 0; err = fdisp_wait_answ(&fdi); if (err != 0) { if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_LISTXATTR); err = EOPNOTSUPP; } goto out; } list_xattr_out = fdi.answ; linux_list_len = list_xattr_out->size; if (linux_list_len == 0) { if (ap->a_size != NULL) *ap->a_size = linux_list_len; goto out; } /* * Retrieve Linux / FUSE compatible list values. */ fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred); list_xattr_in = fdi.indata; list_xattr_in->size = linux_list_len; err = fdisp_wait_answ(&fdi); if (err == ERANGE) { /* * Race detected. The attribute list must've grown since the * first FUSE_LISTXATTR call. Start over. Go all the way back * to userland so we can process signals, if necessary, before * restarting. */ err = ERESTART; goto out; } else if (err != 0) goto out; linux_list = fdi.answ; /* FUSE doesn't allow the server to return more data than requested */ if (fdi.iosize > linux_list_len) { struct fuse_data *data = fuse_get_mpdata(mp); fuse_warn(data, FSESS_WARN_LSEXTATTR_LONG, "server returned " "more extended attribute data than requested; " "should've returned ERANGE instead."); } else { /* But returning less data is fine */ linux_list_len = fdi.iosize; } /* * Retrieve the BSD compatible list values. * The Linux / FUSE attribute list format isn't the same * as FreeBSD's format. So we need to transform it into * FreeBSD's format before giving it to the user. */ bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK); err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len, bsd_list, &bsd_list_len); if (err != 0) goto out; if (ap->a_size != NULL) *ap->a_size = bsd_list_len; if (uio != NULL) err = uiomove(bsd_list, bsd_list_len, uio); out: free(bsd_list, M_TEMP); fdisp_destroy(&fdi); return (err); } /* struct vop_deallocate_args { struct vop_generic_args a_gen; struct vnode *a_vp; off_t *a_offset; off_t *a_len; int a_flags; int a_ioflag; struct ucred *a_cred; }; */ static int fuse_vnop_deallocate(struct vop_deallocate_args *ap) { struct vnode *vp = ap->a_vp; struct mount *mp = vnode_mount(vp); struct fuse_filehandle *fufh; struct fuse_dispatcher fdi; struct fuse_fallocate_in *ffi; struct ucred *cred = ap->a_cred; pid_t pid = curthread->td_proc->p_pid; off_t *len = ap->a_len; off_t *offset = ap->a_offset; int ioflag = ap->a_ioflag; off_t filesize; int err; bool closefufh = false; if (fuse_isdeadfs(vp)) return (ENXIO); if (vfs_isrdonly(mp)) return (EROFS); if (fsess_not_impl(mp, FUSE_FALLOCATE)) goto fallback; err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) { /* * nfsd will do I/O without first doing VOP_OPEN. We * must implicitly open the file here */ err = fuse_filehandle_open(vp, FWRITE, &fufh, curthread, cred); closefufh = true; } if (err) return (err); fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE); err = fuse_vnode_size(vp, &filesize, cred, curthread); if (err) goto out; fuse_inval_buf_range(vp, filesize, *offset, *offset + *len); fdisp_init(&fdi, sizeof(*ffi)); fdisp_make_vp(&fdi, FUSE_FALLOCATE, vp, curthread, cred); ffi = fdi.indata; ffi->fh = fufh->fh_id; ffi->offset = *offset; ffi->length = *len; /* * FreeBSD's fspacectl is equivalent to Linux's fallocate with * mode == FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE */ ffi->mode = FUSE_FALLOC_FL_PUNCH_HOLE | FUSE_FALLOC_FL_KEEP_SIZE; err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fdisp_destroy(&fdi); fsess_set_notimpl(mp, FUSE_FALLOCATE); goto fallback; } else if (err == EOPNOTSUPP) { /* * The file system server does not support FUSE_FALLOCATE with * the supplied mode for this particular file. */ fdisp_destroy(&fdi); goto fallback; } else if (!err) { /* * Clip the returned offset to EoF. Do it here rather than * before FUSE_FALLOCATE just in case the kernel's cached file * size is out of date. Unfortunately, FUSE does not return * any information about filesize from that operation. */ *offset = MIN(*offset + *len, filesize); *len = 0; fuse_vnode_undirty_cached_timestamps(vp, false); fuse_internal_clear_suid_on_write(vp, cred, curthread); if (ioflag & IO_SYNC) err = fuse_internal_fsync(vp, curthread, MNT_WAIT, false); } out: fdisp_destroy(&fdi); if (closefufh) fuse_filehandle_close(vp, fufh, curthread, cred); return (err); fallback: if (closefufh) fuse_filehandle_close(vp, fufh, curthread, cred); return (vop_stddeallocate(ap)); } /* struct vop_deleteextattr_args { struct vop_generic_args a_gen; struct vnode *a_vp; int a_attrnamespace; const char *a_name; struct ucred *a_cred; struct thread *a_td; }; */ static int fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap) { struct vnode *vp = ap->a_vp; struct fuse_dispatcher fdi; struct mount *mp = vnode_mount(vp); struct thread *td = ap->a_td; struct ucred *cred = ap->a_cred; char *prefix; size_t len; char *attr_str; int err; if (fuse_isdeadfs(vp)) return (ENXIO); if (fsess_not_impl(mp, FUSE_REMOVEXATTR)) return EOPNOTSUPP; if (vfs_isrdonly(mp)) return EROFS; err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VWRITE); if (err) return err; /* Default to looking for user attributes. */ if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM) prefix = EXTATTR_NAMESPACE_SYSTEM_STRING; else prefix = EXTATTR_NAMESPACE_USER_STRING; len = strlen(prefix) + sizeof(extattr_namespace_separator) + strlen(ap->a_name) + 1; fdisp_init(&fdi, len); fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred); attr_str = fdi.indata; snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator, ap->a_name); err = fdisp_wait_answ(&fdi); if (err == ENOSYS) { fsess_set_notimpl(mp, FUSE_REMOVEXATTR); err = EOPNOTSUPP; } fdisp_destroy(&fdi); return (err); } /* struct vnop_print_args { struct vnode *a_vp; }; */ static int fuse_vnop_print(struct vop_print_args *ap) { struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp); printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n", (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid, (uintmax_t)fvdat->nlookup, fvdat->flag); return 0; } /* * Get an NFS filehandle for a FUSE file. * * This will only work for FUSE file systems that guarantee the uniqueness of * nodeid:generation, which most don't. */ /* vop_vptofh { IN struct vnode *a_vp; IN struct fid *a_fhp; }; */ static int fuse_vnop_vptofh(struct vop_vptofh_args *ap) { struct vnode *vp = ap->a_vp; struct fuse_vnode_data *fvdat = VTOFUD(vp); struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp); _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid), "FUSE fid type is too big"); struct mount *mp = vnode_mount(vp); struct fuse_data *data = fuse_get_mpdata(mp); struct vattr va; int err; if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) { /* NFS requires lookups for "." and ".." */ SDT_PROBE2(fusefs, , vnops, trace, 1, "VOP_VPTOFH without FUSE_EXPORT_SUPPORT"); return EOPNOTSUPP; } if ((mp->mnt_flag & MNT_EXPORTED) && !(data->dataflags & FSESS_NO_OPENDIR_SUPPORT)) { /* * NFS is stateless, so nfsd must reopen a directory on every * call to VOP_READDIR, passing in the d_off field from the * final dirent of the previous invocation. But without * FUSE_NO_OPENDIR_SUPPORT, the FUSE protocol does not * guarantee that d_off will be valid after a directory is * closed and reopened. So prohibit exporting FUSE file * systems that don't set that flag. * * But userspace NFS servers don't have this problem. */ SDT_PROBE2(fusefs, , vnops, trace, 1, "VOP_VPTOFH without FUSE_NO_OPENDIR_SUPPORT"); return EOPNOTSUPP; } err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread); if (err) return err; /*ip = VTOI(ap->a_vp);*/ /*ufhp = (struct ufid *)ap->a_fhp;*/ fhp->len = sizeof(struct fuse_fid); fhp->nid = fvdat->nid; if (fvdat->generation <= UINT32_MAX) fhp->gen = fvdat->generation; else return EOVERFLOW; return (0); } diff --git a/tests/sys/fs/fusefs/access.cc b/tests/sys/fs/fusefs/access.cc index 3d6cddb9417b..5762269fac7b 100644 --- a/tests/sys/fs/fusefs/access.cc +++ b/tests/sys/fs/fusefs/access.cc @@ -1,301 +1,301 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2019 The FreeBSD Foundation * * This software was developed by BFF Storage Systems, LLC under sponsorship * from the FreeBSD Foundation. * * 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 AUTHOR 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 AUTHOR 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. */ extern "C" { #include #include #include #include } #include "mockfs.hh" #include "utils.hh" using namespace testing; class Access: public FuseTest { public: virtual void SetUp() { FuseTest::SetUp(); // Clear the default FUSE_ACCESS expectation Mock::VerifyAndClearExpectations(m_mock); } void expect_lookup(const char *relpath, uint64_t ino) { FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, 0, 1); } /* - * Expect tha FUSE_ACCESS will never be called for the given inode, with any + * Expect that FUSE_ACCESS will never be called for the given inode, with any * bits in the supplied access_mask set */ void expect_noaccess(uint64_t ino, mode_t access_mask) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_ACCESS && in.header.nodeid == ino && in.body.access.mask & access_mask); }, Eq(true)), _) ).Times(0); } }; class RofsAccess: public Access { public: virtual void SetUp() { m_ro = true; Access::SetUp(); } }; /* * Change the mode of a file. * * There should never be a FUSE_ACCESS sent for this operation, except for * search permissions on the parent directory. * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245689 */ TEST_F(Access, chmod) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t newmode = 0644; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_lookup(RELPATH, ino); expect_noaccess(ino, 0); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; // Must match nodeid out.body.attr.attr.mode = S_IFREG | newmode; }))); EXPECT_EQ(0, chmod(FULLPATH, newmode)) << strerror(errno); } /* * Create a new file * * There should never be a FUSE_ACCESS sent for this operation, except for * search permissions on the parent directory. * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245689 */ TEST_F(Access, create) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; mode_t mode = S_IFREG | 0755; uint64_t ino = 42; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_noaccess(FUSE_ROOT_ID, R_OK | W_OK); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_noaccess(ino, 0); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_CREATE); }, Eq(true)), _) ).WillOnce(ReturnErrno(EPERM)); EXPECT_EQ(-1, open(FULLPATH, O_CREAT | O_EXCL, mode)); EXPECT_EQ(EPERM, errno); } /* The error case of FUSE_ACCESS. */ TEST_F(Access, eaccess) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = X_OK; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_lookup(RELPATH, ino); expect_access(ino, access_mode, EACCES); ASSERT_NE(0, access(FULLPATH, access_mode)); ASSERT_EQ(EACCES, errno); } /* * If the filesystem returns ENOSYS, then it is treated as a permanent success, * and subsequent VOP_ACCESS calls will succeed automatically without querying * the daemon. */ TEST_F(Access, enosys) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = R_OK; expect_access(FUSE_ROOT_ID, X_OK, ENOSYS); FuseTest::expect_lookup(RELPATH, ino, S_IFREG | 0644, 0, 2); ASSERT_EQ(0, access(FULLPATH, access_mode)) << strerror(errno); ASSERT_EQ(0, access(FULLPATH, access_mode)) << strerror(errno); } TEST_F(RofsAccess, erofs) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = W_OK; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_lookup(RELPATH, ino); ASSERT_NE(0, access(FULLPATH, access_mode)); ASSERT_EQ(EROFS, errno); } /* * Lookup an extended attribute * * There should never be a FUSE_ACCESS sent for this operation, except for * search permissions on the parent directory. * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245689 */ TEST_F(Access, Getxattr) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; char data[80]; int ns = EXTATTR_NAMESPACE_USER; ssize_t r; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_lookup(RELPATH, ino); expect_noaccess(ino, 0); expect_getxattr(ino, "user.foo", ReturnErrno(ENOATTR)); r = extattr_get_file(FULLPATH, ns, "foo", data, sizeof(data)); ASSERT_EQ(-1, r); ASSERT_EQ(ENOATTR, errno); } /* The successful case of FUSE_ACCESS. */ TEST_F(Access, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = R_OK; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_lookup(RELPATH, ino); expect_access(ino, access_mode, 0); ASSERT_EQ(0, access(FULLPATH, access_mode)) << strerror(errno); } /* * Unlink a file * * There should never be a FUSE_ACCESS sent for this operation, except for * search permissions on the parent directory. * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245689 */ TEST_F(Access, unlink) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_noaccess(FUSE_ROOT_ID, W_OK | R_OK); expect_noaccess(ino, 0); expect_lookup(RELPATH, ino); expect_unlink(1, RELPATH, EPERM); ASSERT_NE(0, unlink(FULLPATH)); ASSERT_EQ(EPERM, errno); } /* * Unlink a file whose parent diretory's sticky bit is set * * There should never be a FUSE_ACCESS sent for this operation, except for * search permissions on the parent directory. * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245689 */ TEST_F(Access, unlink_sticky_directory) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_access(FUSE_ROOT_ID, X_OK, 0); expect_noaccess(FUSE_ROOT_ID, W_OK | R_OK); expect_noaccess(ino, 0); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_GETATTR && in.header.nodeid == FUSE_ROOT_ID); }, Eq(true)), _) ).WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = FUSE_ROOT_ID; out.body.attr.attr.mode = S_IFDIR | 01777; out.body.attr.attr.uid = 0; out.body.attr.attr_valid = UINT64_MAX; }))); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_ACCESS && in.header.nodeid == ino); }, Eq(true)), _) ).Times(0); expect_lookup(RELPATH, ino); expect_unlink(FUSE_ROOT_ID, RELPATH, EPERM); ASSERT_EQ(-1, unlink(FULLPATH)); ASSERT_EQ(EPERM, errno); } diff --git a/tests/sys/fs/fusefs/default_permissions.cc b/tests/sys/fs/fusefs/default_permissions.cc index 1a1ee5a54aed..4b04297d97ac 100644 --- a/tests/sys/fs/fusefs/default_permissions.cc +++ b/tests/sys/fs/fusefs/default_permissions.cc @@ -1,1605 +1,1644 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2019 The FreeBSD Foundation * * This software was developed by BFF Storage Systems, LLC under sponsorship * from the FreeBSD Foundation. * * 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 AUTHOR 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 AUTHOR 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. */ /* * Tests for the "default_permissions" mount option. They must be in their own - * file so they can be run as an unprivileged user + * file so they can be run as an unprivileged user. */ extern "C" { #include #include #include #include #include } #include "mockfs.hh" #include "utils.hh" using namespace testing; class DefaultPermissions: public FuseTest { virtual void SetUp() { m_default_permissions = true; FuseTest::SetUp(); if (HasFatalFailure() || IsSkipped()) return; if (geteuid() == 0) { GTEST_SKIP() << "This test requires an unprivileged user"; } /* With -o default_permissions, FUSE_ACCESS should never be called */ EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_ACCESS); }, Eq(true)), _) ).Times(0); } public: void expect_chmod(uint64_t ino, mode_t mode, uint64_t size = 0) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == FATTR_MODE && in.body.setattr.mode == mode); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; // Must match nodeid out.body.attr.attr.mode = S_IFREG | mode; out.body.attr.attr.size = size; out.body.attr.attr_valid = UINT64_MAX; }))); } void expect_create(const char *relpath, uint64_t ino) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { const char *name = (const char*)in.body.bytes + sizeof(fuse_create_in); return (in.header.opcode == FUSE_CREATE && (0 == strcmp(relpath, name))); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, create); out.body.create.entry.attr.mode = S_IFREG | 0644; out.body.create.entry.nodeid = ino; out.body.create.entry.entry_valid = UINT64_MAX; out.body.create.entry.attr_valid = UINT64_MAX; }))); } void expect_copy_file_range(uint64_t ino_in, uint64_t off_in, uint64_t ino_out, uint64_t off_out, uint64_t len) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_COPY_FILE_RANGE && in.header.nodeid == ino_in && in.body.copy_file_range.off_in == off_in && in.body.copy_file_range.nodeid_out == ino_out && in.body.copy_file_range.off_out == off_out && in.body.copy_file_range.len == len); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, write); out.body.write.size = len; }))); } void expect_getattr(uint64_t ino, mode_t mode, uint64_t attr_valid, int times, uid_t uid = 0, gid_t gid = 0) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_GETATTR && in.header.nodeid == ino); }, Eq(true)), _) ).Times(times) .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; // Must match nodeid out.body.attr.attr.mode = mode; out.body.attr.attr.size = 0; out.body.attr.attr.uid = uid; out.body.attr.attr.gid = gid; out.body.attr.attr_valid = attr_valid; }))); } void expect_lookup(const char *relpath, uint64_t ino, mode_t mode, uint64_t attr_valid, uid_t uid = 0, gid_t gid = 0) { FuseTest::expect_lookup(relpath, ino, mode, 0, 1, attr_valid, uid, gid); } }; class Access: public DefaultPermissions {}; class Chown: public DefaultPermissions {}; class Chgrp: public DefaultPermissions {}; class CopyFileRange: public DefaultPermissions {}; class Fspacectl: public DefaultPermissions {}; class Lookup: public DefaultPermissions {}; class Open: public DefaultPermissions {}; class PosixFallocate: public DefaultPermissions {}; +class Read: public DefaultPermissions {}; class Setattr: public DefaultPermissions {}; class Unlink: public DefaultPermissions {}; class Utimensat: public DefaultPermissions {}; class Write: public DefaultPermissions {}; /* * Test permission handling during create, mkdir, mknod, link, symlink, and * rename vops (they all share a common path for permission checks in * VOP_LOOKUP) */ class Create: public DefaultPermissions {}; class Deleteextattr: public DefaultPermissions { public: void expect_removexattr() { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_REMOVEXATTR); }, Eq(true)), _) ).WillOnce(Invoke(ReturnErrno(0))); } }; class Getextattr: public DefaultPermissions { public: void expect_getxattr(ProcessMockerT r) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_GETXATTR); }, Eq(true)), _) ).WillOnce(Invoke(r)); } }; class Listextattr: public DefaultPermissions { public: void expect_listxattr() { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_LISTXATTR); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([](auto i __unused, auto& out) { out.body.listxattr.size = 0; SET_OUT_HEADER_LEN(out, listxattr); }))); } }; class Rename: public DefaultPermissions { public: /* * Expect a rename and respond with the given error. Don't both to * validate arguments; the tests in rename.cc do that. */ void expect_rename(int error) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_RENAME); }, Eq(true)), _) ).WillOnce(Invoke(ReturnErrno(error))); } }; class Setextattr: public DefaultPermissions { public: void expect_setxattr(int error) { EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETXATTR); }, Eq(true)), _) ).WillOnce(Invoke(ReturnErrno(error))); } }; /* Return a group to which this user does not belong */ static gid_t excluded_group() { int i, ngroups = 64; gid_t newgid, groups[ngroups]; getgrouplist(getlogin(), getegid(), groups, &ngroups); for (newgid = 0; ; newgid++) { bool belongs = false; for (i = 0; i < ngroups; i++) { if (groups[i] == newgid) belongs = true; } if (!belongs) break; } /* newgid is now a group to which the current user does not belong */ return newgid; } TEST_F(Access, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = X_OK; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX); ASSERT_NE(0, access(FULLPATH, access_mode)); ASSERT_EQ(EACCES, errno); } TEST_F(Access, eacces_no_cached_attrs) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = X_OK; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, 0, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, 0); expect_getattr(ino, S_IFREG | 0644, 0, 1); /* * Once default_permissions is properly implemented, there might be * another FUSE_GETATTR or something in here. But there should not be * a FUSE_ACCESS */ ASSERT_NE(0, access(FULLPATH, access_mode)); ASSERT_EQ(EACCES, errno); } TEST_F(Access, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t access_mode = R_OK; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX); /* * Once default_permissions is properly implemented, there might be * another FUSE_GETATTR or something in here. */ ASSERT_EQ(0, access(FULLPATH, access_mode)) << strerror(errno); } /* Unprivileged users may chown a file to their own uid */ TEST_F(Chown, chown_to_self) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t mode = 0755; uid_t uid; uid = geteuid(); expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, uid); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, uid); /* The OS may optimize chown by omitting the redundant setattr */ EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out){ SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.mode = S_IFREG | mode; out.body.attr.attr.uid = uid; }))); EXPECT_EQ(0, chown(FULLPATH, uid, -1)) << strerror(errno); } /* * A successful chown by a non-privileged non-owner should clear a file's SUID * bit */ TEST_F(Chown, clear_suid) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const mode_t oldmode = 06755; const mode_t newmode = 0755; uid_t uid = geteuid(); uint32_t valid = FATTR_UID | FATTR_MODE; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, uid); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, uid); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == valid && in.body.setattr.mode == newmode); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; // Must match nodeid out.body.attr.attr.mode = S_IFREG | newmode; out.body.attr.attr_valid = UINT64_MAX; }))); EXPECT_EQ(0, chown(FULLPATH, uid, -1)) << strerror(errno); } /* Only root may change a file's owner */ TEST_F(Chown, eperm) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t mode = 0755; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, geteuid()); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, geteuid()); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).Times(0); EXPECT_NE(0, chown(FULLPATH, 0, -1)); EXPECT_EQ(EPERM, errno); } /* * A successful chgrp by a non-privileged non-owner should clear a file's SUID * bit */ TEST_F(Chgrp, clear_suid) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const mode_t oldmode = 06755; const mode_t newmode = 0755; uid_t uid = geteuid(); gid_t gid = getegid(); uint32_t valid = FATTR_GID | FATTR_MODE; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, uid); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, uid, gid); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == valid && in.body.setattr.mode == newmode); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; // Must match nodeid out.body.attr.attr.mode = S_IFREG | newmode; out.body.attr.attr_valid = UINT64_MAX; }))); EXPECT_EQ(0, chown(FULLPATH, -1, gid)) << strerror(errno); } /* non-root users may only chgrp a file to a group they belong to */ TEST_F(Chgrp, eperm) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t mode = 0755; uid_t uid; gid_t gid, newgid; uid = geteuid(); gid = getegid(); newgid = excluded_group(); expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, uid, gid); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, uid, gid); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).Times(0); EXPECT_NE(0, chown(FULLPATH, -1, newgid)); EXPECT_EQ(EPERM, errno); } TEST_F(Chgrp, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t mode = 0755; uid_t uid; gid_t gid, newgid; uid = geteuid(); gid = 0; newgid = getegid(); expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, uid, gid); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, uid, gid); /* The OS may optimize chgrp by omitting the redundant setattr */ EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino); }, Eq(true)), _) ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out){ SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.mode = S_IFREG | mode; out.body.attr.attr.uid = uid; out.body.attr.attr.gid = newgid; }))); EXPECT_EQ(0, chown(FULLPATH, -1, newgid)) << strerror(errno); } /* A write by a non-owner should clear a file's SGID bit */ TEST_F(CopyFileRange, clear_sgid) { const char FULLPATH_IN[] = "mountpoint/in.txt"; const char RELPATH_IN[] = "in.txt"; const char FULLPATH_OUT[] = "mountpoint/out.txt"; const char RELPATH_OUT[] = "out.txt"; struct stat sb; uint64_t ino_in = 42; uint64_t ino_out = 43; mode_t oldmode = 02777; mode_t newmode = 0777; off_t fsize = 16; off_t off_in = 0; off_t off_out = 8; off_t len = 8; int fd_in, fd_out; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH_IN, ino_in, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino_in, 0, 1); FuseTest::expect_lookup(RELPATH_OUT, ino_out, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino_out, 0, 1); expect_copy_file_range(ino_in, off_in, ino_out, off_out, len); expect_chmod(ino_out, newmode, fsize); fd_in = open(FULLPATH_IN, O_RDONLY); ASSERT_LE(0, fd_in) << strerror(errno); fd_out = open(FULLPATH_OUT, O_WRONLY); ASSERT_LE(0, fd_out) << strerror(errno); ASSERT_EQ(len, copy_file_range(fd_in, &off_in, fd_out, &off_out, len, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd_out, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); ASSERT_EQ(0, fstat(fd_in, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | oldmode, sb.st_mode); leak(fd_in); leak(fd_out); } /* A write by a non-owner should clear a file's SUID bit */ TEST_F(CopyFileRange, clear_suid) { const char FULLPATH_IN[] = "mountpoint/in.txt"; const char RELPATH_IN[] = "in.txt"; const char FULLPATH_OUT[] = "mountpoint/out.txt"; const char RELPATH_OUT[] = "out.txt"; struct stat sb; uint64_t ino_in = 42; uint64_t ino_out = 43; mode_t oldmode = 04777; mode_t newmode = 0777; off_t fsize = 16; off_t off_in = 0; off_t off_out = 8; off_t len = 8; int fd_in, fd_out; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH_IN, ino_in, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino_in, 0, 1); FuseTest::expect_lookup(RELPATH_OUT, ino_out, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino_out, 0, 1); expect_copy_file_range(ino_in, off_in, ino_out, off_out, len); expect_chmod(ino_out, newmode, fsize); fd_in = open(FULLPATH_IN, O_RDONLY); ASSERT_LE(0, fd_in) << strerror(errno); fd_out = open(FULLPATH_OUT, O_WRONLY); ASSERT_LE(0, fd_out) << strerror(errno); ASSERT_EQ(len, copy_file_range(fd_in, &off_in, fd_out, &off_out, len, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd_out, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); ASSERT_EQ(0, fstat(fd_in, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | oldmode, sb.st_mode); leak(fd_in); leak(fd_out); } TEST_F(Create, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_create(RELPATH, ino); fd = open(FULLPATH, O_CREAT | O_EXCL, 0644); ASSERT_LE(0, fd) << strerror(errno); leak(fd); } TEST_F(Create, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); ASSERT_EQ(-1, open(FULLPATH, O_CREAT | O_EXCL, 0644)); EXPECT_EQ(EACCES, errno); } TEST_F(Deleteextattr, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, 0); ASSERT_EQ(-1, extattr_delete_file(FULLPATH, ns, "foo")); ASSERT_EQ(EACCES, errno); } TEST_F(Deleteextattr, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); expect_removexattr(); ASSERT_EQ(0, extattr_delete_file(FULLPATH, ns, "foo")) << strerror(errno); } /* Delete system attributes requires superuser privilege */ TEST_F(Deleteextattr, system) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_SYSTEM; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0666, UINT64_MAX, geteuid()); ASSERT_EQ(-1, extattr_delete_file(FULLPATH, ns, "foo")); ASSERT_EQ(EPERM, errno); } /* Anybody with write permission can set both timestamps to UTIME_NOW */ TEST_F(Utimensat, utime_now) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; /* Write permissions for everybody */ const mode_t mode = 0666; uid_t owner = 0; const timespec times[2] = { {.tv_sec = 0, .tv_nsec = UTIME_NOW}, {.tv_sec = 0, .tv_nsec = UTIME_NOW}, }; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, owner); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid & FATTR_ATIME && in.body.setattr.valid & FATTR_MTIME); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.mode = S_IFREG | mode; }))); ASSERT_EQ(0, utimensat(AT_FDCWD, FULLPATH, ×[0], 0)) << strerror(errno); } /* Anybody can set both timestamps to UTIME_OMIT */ TEST_F(Utimensat, utime_omit) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; /* Write permissions for no one */ const mode_t mode = 0444; uid_t owner = 0; const timespec times[2] = { {.tv_sec = 0, .tv_nsec = UTIME_OMIT}, {.tv_sec = 0, .tv_nsec = UTIME_OMIT}, }; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | mode, UINT64_MAX, owner); ASSERT_EQ(0, utimensat(AT_FDCWD, FULLPATH, ×[0], 0)) << strerror(errno); } /* Deleting user attributes merely requires WRITE privilege */ TEST_F(Deleteextattr, user) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0666, UINT64_MAX, 0); expect_removexattr(); ASSERT_EQ(0, extattr_delete_file(FULLPATH, ns, "foo")) << strerror(errno); } TEST_F(Getextattr, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; char data[80]; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0600, UINT64_MAX, 0); ASSERT_EQ(-1, extattr_get_file(FULLPATH, ns, "foo", data, sizeof(data))); ASSERT_EQ(EACCES, errno); } TEST_F(Getextattr, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; char data[80]; const char value[] = "whatever"; ssize_t value_len = strlen(value) + 1; int ns = EXTATTR_NAMESPACE_USER; ssize_t r; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); /* Getting user attributes only requires read access */ expect_lookup(RELPATH, ino, S_IFREG | 0444, UINT64_MAX, 0); expect_getxattr( ReturnImmediate([&](auto in __unused, auto& out) { memcpy((void*)out.body.bytes, value, value_len); out.header.len = sizeof(out.header) + value_len; }) ); r = extattr_get_file(FULLPATH, ns, "foo", data, sizeof(data)); ASSERT_EQ(value_len, r) << strerror(errno); EXPECT_STREQ(value, data); } /* Getting system attributes requires superuser privileges */ TEST_F(Getextattr, system) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; char data[80]; int ns = EXTATTR_NAMESPACE_SYSTEM; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0666, UINT64_MAX, geteuid()); ASSERT_EQ(-1, extattr_get_file(FULLPATH, ns, "foo", data, sizeof(data))); ASSERT_EQ(EPERM, errno); } TEST_F(Listextattr, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0600, UINT64_MAX, 0); ASSERT_EQ(-1, extattr_list_file(FULLPATH, ns, NULL, 0)); ASSERT_EQ(EACCES, errno); } TEST_F(Listextattr, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); /* Listing user extended attributes merely requires read access */ expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, 0); expect_listxattr(); ASSERT_EQ(0, extattr_list_file(FULLPATH, ns, NULL, 0)) << strerror(errno); } /* Listing system xattrs requires superuser privileges */ TEST_F(Listextattr, system) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int ns = EXTATTR_NAMESPACE_SYSTEM; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); /* Listing user extended attributes merely requires read access */ expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); ASSERT_EQ(-1, extattr_list_file(FULLPATH, ns, NULL, 0)); ASSERT_EQ(EPERM, errno); } /* A write by a non-owner should clear a file's SGID bit */ TEST_F(Fspacectl, clear_sgid) { const char FULLPATH[] = "mountpoint/file.txt"; const char RELPATH[] = "file.txt"; struct stat sb; struct spacectl_range rqsr; uint64_t ino = 42; mode_t oldmode = 02777; mode_t newmode = 0777; off_t fsize = 16; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH, ino, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino, 0, 1); expect_fallocate(ino, off, len, FUSE_FALLOC_FL_KEEP_SIZE | FUSE_FALLOC_FL_PUNCH_HOLE, 0); expect_chmod(ino, newmode, fsize); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); rqsr.r_len = len; rqsr.r_offset = off; EXPECT_EQ(0, fspacectl(fd, SPACECTL_DEALLOC, &rqsr, 0, NULL)); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* A write by a non-owner should clear a file's SUID bit */ TEST_F(Fspacectl, clear_suid) { const char FULLPATH[] = "mountpoint/file.txt"; const char RELPATH[] = "file.txt"; struct stat sb; struct spacectl_range rqsr; uint64_t ino = 42; mode_t oldmode = 04777; mode_t newmode = 0777; off_t fsize = 16; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH, ino, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino, 0, 1); expect_fallocate(ino, off, len, FUSE_FALLOC_FL_KEEP_SIZE | FUSE_FALLOC_FL_PUNCH_HOLE, 0); expect_chmod(ino, newmode, fsize); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); rqsr.r_len = len; rqsr.r_offset = off; EXPECT_EQ(0, fspacectl(fd, SPACECTL_DEALLOC, &rqsr, 0, NULL)); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* * fspacectl() of a file without writable permissions should succeed as * long as the file descriptor is writable. This is important when combined * with O_CREAT */ TEST_F(Fspacectl, posix_fallocate_of_newly_created_file) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; struct spacectl_range rqsr; const uint64_t ino = 42; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_create(RELPATH, ino); expect_fallocate(ino, off, len, FUSE_FALLOC_FL_KEEP_SIZE | FUSE_FALLOC_FL_PUNCH_HOLE, 0); fd = open(FULLPATH, O_CREAT | O_RDWR, 0); ASSERT_LE(0, fd) << strerror(errno); rqsr.r_len = len; rqsr.r_offset = off; EXPECT_EQ(0, fspacectl(fd, SPACECTL_DEALLOC, &rqsr, 0, NULL)); leak(fd); } /* A component of the search path lacks execute permissions */ TEST_F(Lookup, eacces) { const char FULLPATH[] = "mountpoint/some_dir/some_file.txt"; const char RELDIRPATH[] = "some_dir"; uint64_t dir_ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELDIRPATH, dir_ino, S_IFDIR | 0700, UINT64_MAX, 0); EXPECT_EQ(-1, access(FULLPATH, F_OK)); EXPECT_EQ(EACCES, errno); } TEST_F(Open, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX); EXPECT_EQ(-1, open(FULLPATH, O_RDWR)); EXPECT_EQ(EACCES, errno); } TEST_F(Open, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX); expect_open(ino, 0, 1); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); leak(fd); } /* A write by a non-owner should clear a file's SGID bit */ TEST_F(PosixFallocate, clear_sgid) { const char FULLPATH[] = "mountpoint/file.txt"; const char RELPATH[] = "file.txt"; struct stat sb; uint64_t ino = 42; mode_t oldmode = 02777; mode_t newmode = 0777; off_t fsize = 16; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH, ino, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino, 0, 1); expect_fallocate(ino, off, len, 0, 0); expect_chmod(ino, newmode, fsize); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); EXPECT_EQ(0, posix_fallocate(fd, off, len)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* A write by a non-owner should clear a file's SUID bit */ TEST_F(PosixFallocate, clear_suid) { const char FULLPATH[] = "mountpoint/file.txt"; const char RELPATH[] = "file.txt"; struct stat sb; uint64_t ino = 42; mode_t oldmode = 04777; mode_t newmode = 0777; off_t fsize = 16; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); FuseTest::expect_lookup(RELPATH, ino, S_IFREG | oldmode, fsize, 1, UINT64_MAX, 0, 0); expect_open(ino, 0, 1); expect_fallocate(ino, off, len, 0, 0); expect_chmod(ino, newmode, fsize); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); EXPECT_EQ(0, posix_fallocate(fd, off, len)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* * posix_fallocate() of a file without writable permissions should succeed as * long as the file descriptor is writable. This is important when combined * with O_CREAT */ TEST_F(PosixFallocate, posix_fallocate_of_newly_created_file) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; off_t off = 8; off_t len = 8; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_create(RELPATH, ino); expect_fallocate(ino, off, len, 0, 0); fd = open(FULLPATH, O_CREAT | O_RDWR, 0); ASSERT_LE(0, fd) << strerror(errno); EXPECT_EQ(0, posix_fallocate(fd, off, len)) << strerror(errno); leak(fd); } TEST_F(Rename, eacces_on_srcdir) { const char FULLDST[] = "mountpoint/d/dst"; const char RELDST[] = "d/dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1, 0); expect_lookup(RELSRC, ino, S_IFREG | 0644, UINT64_MAX); EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) .Times(AnyNumber()) .WillRepeatedly(Invoke(ReturnErrno(ENOENT))); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EACCES, errno); } TEST_F(Rename, eacces_on_dstdir_for_creating) { const char FULLDST[] = "mountpoint/d/dst"; const char RELDSTDIR[] = "d"; const char RELDST[] = "dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t src_ino = 42; uint64_t dstdir_ino = 43; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, src_ino, S_IFREG | 0644, UINT64_MAX); expect_lookup(RELDSTDIR, dstdir_ino, S_IFDIR | 0755, UINT64_MAX); EXPECT_LOOKUP(dstdir_ino, RELDST).WillOnce(Invoke(ReturnErrno(ENOENT))); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EACCES, errno); } TEST_F(Rename, eacces_on_dstdir_for_removing) { const char FULLDST[] = "mountpoint/d/dst"; const char RELDSTDIR[] = "d"; const char RELDST[] = "dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t src_ino = 42; uint64_t dstdir_ino = 43; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, src_ino, S_IFREG | 0644, UINT64_MAX); expect_lookup(RELDSTDIR, dstdir_ino, S_IFDIR | 0755, UINT64_MAX); EXPECT_LOOKUP(dstdir_ino, RELDST).WillOnce(Invoke(ReturnErrno(ENOENT))); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EACCES, errno); } TEST_F(Rename, eperm_on_sticky_srcdir) { const char FULLDST[] = "mountpoint/d/dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 01777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, ino, S_IFREG | 0644, UINT64_MAX); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EPERM, errno); } /* * A user cannot move out a subdirectory that he does not own, because that * would require changing the subdirectory's ".." dirent */ TEST_F(Rename, eperm_for_subdirectory) { const char FULLDST[] = "mountpoint/d/dst"; const char FULLSRC[] = "mountpoint/src"; const char RELDSTDIR[] = "d"; const char RELDST[] = "dst"; const char RELSRC[] = "src"; uint64_t ino = 42; uint64_t dstdir_ino = 43; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, ino, S_IFDIR | 0755, UINT64_MAX, 0); expect_lookup(RELDSTDIR, dstdir_ino, S_IFDIR | 0777, UINT64_MAX, 0); EXPECT_LOOKUP(dstdir_ino, RELDST).WillOnce(Invoke(ReturnErrno(ENOENT))); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EACCES, errno); } /* * A user _can_ rename a subdirectory to which he lacks write permissions, if * it will keep the same parent */ TEST_F(Rename, subdirectory_to_same_dir) { const char FULLDST[] = "mountpoint/dst"; const char FULLSRC[] = "mountpoint/src"; const char RELDST[] = "dst"; const char RELSRC[] = "src"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, ino, S_IFDIR | 0755, UINT64_MAX, 0); EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_rename(0); ASSERT_EQ(0, rename(FULLSRC, FULLDST)) << strerror(errno); } TEST_F(Rename, eperm_on_sticky_dstdir) { const char FULLDST[] = "mountpoint/d/dst"; const char RELDSTDIR[] = "d"; const char RELDST[] = "dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t src_ino = 42; uint64_t dstdir_ino = 43; uint64_t dst_ino = 44; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, src_ino, S_IFREG | 0644, UINT64_MAX); expect_lookup(RELDSTDIR, dstdir_ino, S_IFDIR | 01777, UINT64_MAX); EXPECT_LOOKUP(dstdir_ino, RELDST) .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, entry); out.body.entry.attr.mode = S_IFREG | 0644; out.body.entry.nodeid = dst_ino; out.body.entry.attr_valid = UINT64_MAX; out.body.entry.entry_valid = UINT64_MAX; out.body.entry.attr.uid = 0; }))); ASSERT_EQ(-1, rename(FULLSRC, FULLDST)); ASSERT_EQ(EPERM, errno); } /* Successfully rename a file, overwriting the destination */ TEST_F(Rename, ok) { const char FULLDST[] = "mountpoint/dst"; const char RELDST[] = "dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; // The inode of the already-existing destination file uint64_t dst_ino = 2; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1, geteuid()); expect_lookup(RELSRC, ino, S_IFREG | 0644, UINT64_MAX); expect_lookup(RELDST, dst_ino, S_IFREG | 0644, UINT64_MAX); expect_rename(0); ASSERT_EQ(0, rename(FULLSRC, FULLDST)) << strerror(errno); } TEST_F(Rename, ok_to_remove_src_because_of_stickiness) { const char FULLDST[] = "mountpoint/dst"; const char RELDST[] = "dst"; const char FULLSRC[] = "mountpoint/src"; const char RELSRC[] = "src"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 01777, UINT64_MAX, 1, 0); expect_lookup(RELSRC, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_rename(0); ASSERT_EQ(0, rename(FULLSRC, FULLDST)) << strerror(errno); } +// Don't update atime during close after read, if we lack permissions to write +// that file. +TEST_F(Read, atime_during_close) +{ + const char FULLPATH[] = "mountpoint/some_file.txt"; + const char RELPATH[] = "some_file.txt"; + uint64_t ino = 42; + int fd; + ssize_t bufsize = 100; + uint8_t buf[bufsize]; + const char *CONTENTS = "abcdefgh"; + ssize_t fsize = sizeof(CONTENTS); + + expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); + FuseTest::expect_lookup(RELPATH, ino, S_IFREG | 0755, fsize, + 1, UINT64_MAX, 0, 0); + expect_open(ino, 0, 1); + expect_read(ino, 0, fsize, fsize, CONTENTS); + EXPECT_CALL(*m_mock, process( + ResultOf([&](auto in) { + return (in.header.opcode == FUSE_SETATTR); + }, Eq(true)), + _) + ).Times(0); + expect_flush(ino, 1, ReturnErrno(0)); + expect_release(ino, FuseTest::FH); + + fd = open(FULLPATH, O_RDONLY); + ASSERT_LE(0, fd) << strerror(errno); + + /* Ensure atime will be different than during lookup */ + nap(); + + ASSERT_EQ(fsize, read(fd, buf, bufsize)) << strerror(errno); + + close(fd); +} + TEST_F(Setattr, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t oldmode = 0755; const mode_t newmode = 0644; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, geteuid()); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.mode == newmode); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.mode = S_IFREG | newmode; }))); EXPECT_EQ(0, chmod(FULLPATH, newmode)) << strerror(errno); } TEST_F(Setattr, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t oldmode = 0755; const mode_t newmode = 0644; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, 0); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).Times(0); EXPECT_NE(0, chmod(FULLPATH, newmode)); EXPECT_EQ(EPERM, errno); } /* * ftruncate() of a file without writable permissions should succeed as long as * the file descriptor is writable. This is important when combined with * O_CREAT */ TEST_F(Setattr, ftruncate_of_newly_created_file) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t mode = 0000; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .WillOnce(Invoke(ReturnErrno(ENOENT))); expect_create(RELPATH, ino); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && (in.body.setattr.valid & FATTR_SIZE)); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; out.body.attr.attr.mode = S_IFREG | mode; out.body.attr.attr_valid = UINT64_MAX; }))); fd = open(FULLPATH, O_CREAT | O_RDWR, 0); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(0, ftruncate(fd, 100)) << strerror(errno); leak(fd); } /* * Setting the sgid bit should fail for an unprivileged user who doesn't belong * to the file's group */ TEST_F(Setattr, sgid_by_non_group_member) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t oldmode = 0755; const mode_t newmode = 02755; uid_t uid = geteuid(); gid_t gid = excluded_group(); expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, uid, gid); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).Times(0); EXPECT_NE(0, chmod(FULLPATH, newmode)); EXPECT_EQ(EPERM, errno); } /* Only the superuser may set the sticky bit on a non-directory */ TEST_F(Setattr, sticky_regular_file) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const uint64_t ino = 42; const mode_t oldmode = 0644; const mode_t newmode = 01644; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, geteuid()); EXPECT_CALL(*m_mock, process( ResultOf([](auto in) { return (in.header.opcode == FUSE_SETATTR); }, Eq(true)), _) ).Times(0); EXPECT_NE(0, chmod(FULLPATH, newmode)); EXPECT_EQ(EFTYPE, errno); } TEST_F(Setextattr, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const char value[] = "whatever"; ssize_t value_len = strlen(value) + 1; int ns = EXTATTR_NAMESPACE_USER; ssize_t r; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); expect_setxattr(0); r = extattr_set_file(FULLPATH, ns, "foo", (const void*)value, value_len); ASSERT_EQ(value_len, r) << strerror(errno); } TEST_F(Setextattr, eacces) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const char value[] = "whatever"; ssize_t value_len = strlen(value) + 1; int ns = EXTATTR_NAMESPACE_USER; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, 0); ASSERT_EQ(-1, extattr_set_file(FULLPATH, ns, "foo", (const void*)value, value_len)); ASSERT_EQ(EACCES, errno); } // Setting system attributes requires superuser privileges TEST_F(Setextattr, system) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const char value[] = "whatever"; ssize_t value_len = strlen(value) + 1; int ns = EXTATTR_NAMESPACE_SYSTEM; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0666, UINT64_MAX, geteuid()); ASSERT_EQ(-1, extattr_set_file(FULLPATH, ns, "foo", (const void*)value, value_len)); ASSERT_EQ(EPERM, errno); } // Setting user attributes merely requires write privileges TEST_F(Setextattr, user) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; const char value[] = "whatever"; ssize_t value_len = strlen(value) + 1; int ns = EXTATTR_NAMESPACE_USER; ssize_t r; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0666, UINT64_MAX, 0); expect_setxattr(0); r = extattr_set_file(FULLPATH, ns, "foo", (const void*)value, value_len); ASSERT_EQ(value_len, r) << strerror(errno); } TEST_F(Unlink, ok) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; sem_t sem; ASSERT_EQ(0, sem_init(&sem, 0, 0)) << strerror(errno); expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0777, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); expect_unlink(FUSE_ROOT_ID, RELPATH, 0); expect_forget(ino, 1, &sem); ASSERT_EQ(0, unlink(FULLPATH)) << strerror(errno); sem_wait(&sem); sem_destroy(&sem); } /* * Ensure that a cached name doesn't cause unlink to bypass permission checks * in VOP_LOOKUP. * * This test should pass because lookup(9) purges the namecache entry by doing * a vfs_cache_lookup with ~MAKEENTRY when nameiop == DELETE. */ TEST_F(Unlink, cached_unwritable_directory) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) .Times(AnyNumber()) .WillRepeatedly(Invoke( ReturnImmediate([=](auto i __unused, auto& out) { SET_OUT_HEADER_LEN(out, entry); out.body.entry.attr.mode = S_IFREG | 0644; out.body.entry.nodeid = ino; out.body.entry.entry_valid = UINT64_MAX; })) ); /* Fill name cache */ ASSERT_EQ(0, access(FULLPATH, F_OK)) << strerror(errno); /* Despite cached name , unlink should fail */ ASSERT_EQ(-1, unlink(FULLPATH)); ASSERT_EQ(EACCES, errno); } TEST_F(Unlink, unwritable_directory) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, geteuid()); ASSERT_EQ(-1, unlink(FULLPATH)); ASSERT_EQ(EACCES, errno); } TEST_F(Unlink, sticky_directory) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 01777, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | 0644, UINT64_MAX, 0); ASSERT_EQ(-1, unlink(FULLPATH)); ASSERT_EQ(EPERM, errno); } /* A write by a non-owner should clear a file's SUID bit */ TEST_F(Write, clear_suid) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; struct stat sb; uint64_t ino = 42; mode_t oldmode = 04777; mode_t newmode = 0777; char wbuf[1] = {'x'}; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX); expect_open(ino, 0, 1); expect_write(ino, 0, sizeof(wbuf), sizeof(wbuf), 0, 0, wbuf); expect_chmod(ino, newmode, sizeof(wbuf)); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(1, write(fd, wbuf, sizeof(wbuf))) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* A write by a non-owner should clear a file's SGID bit */ TEST_F(Write, clear_sgid) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; struct stat sb; uint64_t ino = 42; mode_t oldmode = 02777; mode_t newmode = 0777; char wbuf[1] = {'x'}; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX); expect_open(ino, 0, 1); expect_write(ino, 0, sizeof(wbuf), sizeof(wbuf), 0, 0, wbuf); expect_chmod(ino, newmode, sizeof(wbuf)); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(1, write(fd, wbuf, sizeof(wbuf))) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ(S_IFREG | newmode, sb.st_mode); leak(fd); } /* Regression test for a specific recurse-of-nonrecursive-lock panic * * With writeback caching, we can't call vtruncbuf from fuse_io_strategy, or it * may panic. That happens if the FUSE_SETATTR response indicates that the * file's size has changed since the write. */ TEST_F(Write, recursion_panic_while_clearing_suid) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; mode_t oldmode = 04777; mode_t newmode = 0777; char wbuf[1] = {'x'}; int fd; expect_getattr(FUSE_ROOT_ID, S_IFDIR | 0755, UINT64_MAX, 1); expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX); expect_open(ino, 0, 1); expect_write(ino, 0, sizeof(wbuf), sizeof(wbuf), 0, 0, wbuf); /* XXX Return a smaller file size than what we just wrote! */ expect_chmod(ino, newmode, 0); fd = open(FULLPATH, O_WRONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(1, write(fd, wbuf, sizeof(wbuf))) << strerror(errno); leak(fd); } diff --git a/tests/sys/fs/fusefs/read.cc b/tests/sys/fs/fusefs/read.cc index cf2159df646b..3df0420facb9 100644 --- a/tests/sys/fs/fusefs/read.cc +++ b/tests/sys/fs/fusefs/read.cc @@ -1,1363 +1,1446 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2019 The FreeBSD Foundation * * This software was developed by BFF Storage Systems, LLC under sponsorship * from the FreeBSD Foundation. * * 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 AUTHOR 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 AUTHOR 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. */ extern "C" { #include #include #include #include #include #include #include #include #include #include #include } #include "mockfs.hh" #include "utils.hh" using namespace testing; class Read: public FuseTest { public: void expect_lookup(const char *relpath, uint64_t ino, uint64_t size) { FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, size, 1); } }; +class RofsRead: public Read { +public: +virtual void SetUp() { + m_ro = true; + Read::SetUp(); +} +}; + class Read_7_8: public FuseTest { public: virtual void SetUp() { m_kernel_minor_version = 8; FuseTest::SetUp(); } void expect_lookup(const char *relpath, uint64_t ino, uint64_t size) { FuseTest::expect_lookup_7_8(relpath, ino, S_IFREG | 0644, size, 1); } }; class AioRead: public Read { public: virtual void SetUp() { if (!is_unsafe_aio_enabled()) GTEST_SKIP() << "vfs.aio.enable_unsafe must be set for this test"; FuseTest::SetUp(); } }; class AsyncRead: public AioRead { virtual void SetUp() { m_init_flags = FUSE_ASYNC_READ; AioRead::SetUp(); } }; class ReadAhead: public Read, public WithParamInterface> { virtual void SetUp() { int val; const char *node = "vfs.maxbcachebuf"; size_t size = sizeof(val); ASSERT_EQ(0, sysctlbyname(node, &val, &size, NULL, 0)) << strerror(errno); m_maxreadahead = val * get<1>(GetParam()); m_noclusterr = get<0>(GetParam()); Read::SetUp(); } }; class ReadNoatime: public Read { virtual void SetUp() { m_noatime = true; Read::SetUp(); } }; class ReadSigbus: public Read { public: static jmp_buf s_jmpbuf; static void *s_si_addr; void TearDown() { struct sigaction sa; bzero(&sa, sizeof(sa)); sa.sa_handler = SIG_DFL; sigaction(SIGBUS, &sa, NULL); FuseTest::TearDown(); } }; static void handle_sigbus(int signo __unused, siginfo_t *info, void *uap __unused) { ReadSigbus::s_si_addr = info->si_addr; longjmp(ReadSigbus::s_jmpbuf, 1); } jmp_buf ReadSigbus::s_jmpbuf; void *ReadSigbus::s_si_addr; class TimeGran: public Read, public WithParamInterface { public: virtual void SetUp() { m_time_gran = 1 << GetParam(); Read::SetUp(); } }; /* AIO reads need to set the header's pid field correctly */ /* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236379 */ TEST_F(AioRead, aio_read) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; struct aiocb iocb, *piocb; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); iocb.aio_nbytes = bufsize; iocb.aio_fildes = fd; iocb.aio_buf = buf; iocb.aio_offset = 0; iocb.aio_sigevent.sigev_notify = SIGEV_NONE; ASSERT_EQ(0, aio_read(&iocb)) << strerror(errno); ASSERT_EQ(bufsize, aio_waitcomplete(&piocb, NULL)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } /* * Without the FUSE_ASYNC_READ mount option, fuse(4) should ensure that there * is at most one outstanding read operation per file handle */ TEST_F(AioRead, async_read_disabled) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd; ssize_t bufsize = 50; char buf0[bufsize], buf1[bufsize]; off_t off0 = 0; off_t off1 = m_maxbcachebuf; struct aiocb iocb0, iocb1; volatile sig_atomic_t read_count = 0; expect_lookup(RELPATH, ino, 131072); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == FH && in.body.read.offset == (uint64_t)off0); }, Eq(true)), _) ).WillRepeatedly(Invoke([&](auto in __unused, auto &out __unused) { read_count++; /* Filesystem is slow to respond */ })); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == FH && in.body.read.offset == (uint64_t)off1); }, Eq(true)), _) ).WillRepeatedly(Invoke([&](auto in __unused, auto &out __unused) { read_count++; /* Filesystem is slow to respond */ })); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* * Submit two AIO read requests, and respond to neither. If the * filesystem ever gets the second read request, then we failed to * limit outstanding reads. */ iocb0.aio_nbytes = bufsize; iocb0.aio_fildes = fd; iocb0.aio_buf = buf0; iocb0.aio_offset = off0; iocb0.aio_sigevent.sigev_notify = SIGEV_NONE; ASSERT_EQ(0, aio_read(&iocb0)) << strerror(errno); iocb1.aio_nbytes = bufsize; iocb1.aio_fildes = fd; iocb1.aio_buf = buf1; iocb1.aio_offset = off1; iocb1.aio_sigevent.sigev_notify = SIGEV_NONE; ASSERT_EQ(0, aio_read(&iocb1)) << strerror(errno); /* * Sleep for awhile to make sure the kernel has had a chance to issue * the second read, even though the first has not yet returned */ nap(); EXPECT_EQ(read_count, 1); m_mock->kill_daemon(); /* Wait for AIO activity to complete, but ignore errors */ (void)aio_waitcomplete(NULL, NULL); leak(fd); } /* * With the FUSE_ASYNC_READ mount option, fuse(4) may issue multiple * simultaneous read requests on the same file handle. */ TEST_F(AsyncRead, async_read) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd; ssize_t bufsize = 50; char buf0[bufsize], buf1[bufsize]; off_t off0 = 0; off_t off1 = m_maxbcachebuf; off_t fsize = 2 * m_maxbcachebuf; struct aiocb iocb0, iocb1; sem_t sem; ASSERT_EQ(0, sem_init(&sem, 0, 0)) << strerror(errno); expect_lookup(RELPATH, ino, fsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == FH && in.body.read.offset == (uint64_t)off0); }, Eq(true)), _) ).WillOnce(Invoke([&](auto in __unused, auto &out __unused) { sem_post(&sem); /* Filesystem is slow to respond */ })); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == FH && in.body.read.offset == (uint64_t)off1); }, Eq(true)), _) ).WillOnce(Invoke([&](auto in __unused, auto &out __unused) { sem_post(&sem); /* Filesystem is slow to respond */ })); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* * Submit two AIO read requests, but respond to neither. Ensure that * we received both. */ iocb0.aio_nbytes = bufsize; iocb0.aio_fildes = fd; iocb0.aio_buf = buf0; iocb0.aio_offset = off0; iocb0.aio_sigevent.sigev_notify = SIGEV_NONE; ASSERT_EQ(0, aio_read(&iocb0)) << strerror(errno); iocb1.aio_nbytes = bufsize; iocb1.aio_fildes = fd; iocb1.aio_buf = buf1; iocb1.aio_offset = off1; iocb1.aio_sigevent.sigev_notify = SIGEV_NONE; ASSERT_EQ(0, aio_read(&iocb1)) << strerror(errno); /* Wait until both reads have reached the daemon */ ASSERT_EQ(0, sem_wait(&sem)) << strerror(errno); ASSERT_EQ(0, sem_wait(&sem)) << strerror(errno); m_mock->kill_daemon(); /* Wait for AIO activity to complete, but ignore errors */ (void)aio_waitcomplete(NULL, NULL); leak(fd); } /* The kernel should update the cached atime attribute during a read */ TEST_F(Read, atime) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb1, sb2; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb1)); /* Ensure atime will be different than it was during lookup */ nap(); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb2)); /* The kernel should automatically update atime during read */ EXPECT_TRUE(timespeccmp(&sb1.st_atim, &sb2.st_atim, <)); EXPECT_TRUE(timespeccmp(&sb1.st_ctim, &sb2.st_ctim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_mtim, &sb2.st_mtim, ==)); leak(fd); } /* The kernel should update the cached atime attribute during a cached read */ TEST_F(Read, atime_cached) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb1, sb2; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb1)); /* Ensure atime will be different than it was during the first read */ nap(); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb2)); /* The kernel should automatically update atime during read */ EXPECT_TRUE(timespeccmp(&sb1.st_atim, &sb2.st_atim, <)); EXPECT_TRUE(timespeccmp(&sb1.st_ctim, &sb2.st_ctim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_mtim, &sb2.st_mtim, ==)); leak(fd); } /* dirty atime values should be flushed during close */ TEST_F(Read, atime_during_close) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb; uint64_t ino = 42; const mode_t newmode = 0755; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); EXPECT_CALL(*m_mock, process( ResultOf([&](auto in) { uint32_t valid = FATTR_ATIME; return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == valid && (time_t)in.body.setattr.atime == sb.st_atim.tv_sec && (long)in.body.setattr.atimensec == sb.st_atim.tv_nsec); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; out.body.attr.attr.mode = S_IFREG | newmode; }))); expect_flush(ino, 1, ReturnErrno(0)); expect_release(ino, FuseTest::FH); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* Ensure atime will be different than during lookup */ nap(); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)); close(fd); } +/* + * When not using -o default_permissions, the daemon may make its own decisions + * regarding access permissions, and these may be unpredictable. If it rejects + * our attempt to set atime, that should not cause close(2) to fail. + */ +TEST_F(Read, atime_during_close_eacces) +{ + const char FULLPATH[] = "mountpoint/some_file.txt"; + const char RELPATH[] = "some_file.txt"; + const char *CONTENTS = "abcdefgh"; + uint64_t ino = 42; + int fd; + ssize_t bufsize = strlen(CONTENTS); + uint8_t buf[bufsize]; + + expect_lookup(RELPATH, ino, bufsize); + expect_open(ino, 0, 1); + expect_read(ino, 0, bufsize, bufsize, CONTENTS); + EXPECT_CALL(*m_mock, process( + ResultOf([&](auto in) { + uint32_t valid = FATTR_ATIME; + return (in.header.opcode == FUSE_SETATTR && + in.header.nodeid == ino && + in.body.setattr.valid == valid); + }, Eq(true)), + _) + ).WillOnce(Invoke(ReturnErrno(EACCES))); + expect_flush(ino, 1, ReturnErrno(0)); + expect_release(ino, FuseTest::FH); + + fd = open(FULLPATH, O_RDONLY); + ASSERT_LE(0, fd) << strerror(errno); + + /* Ensure atime will be different than during lookup */ + nap(); + + ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); + + ASSERT_EQ(0, close(fd)); +} + /* A cached atime should be flushed during FUSE_SETATTR */ TEST_F(Read, atime_during_setattr) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb; uint64_t ino = 42; const mode_t newmode = 0755; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); EXPECT_CALL(*m_mock, process( ResultOf([&](auto in) { uint32_t valid = FATTR_MODE | FATTR_ATIME; return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == valid && (time_t)in.body.setattr.atime == sb.st_atim.tv_sec && (long)in.body.setattr.atimensec == sb.st_atim.tv_nsec); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; out.body.attr.attr.mode = S_IFREG | newmode; }))); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* Ensure atime will be different than during lookup */ nap(); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)); ASSERT_EQ(0, fchmod(fd, newmode)) << strerror(errno); leak(fd); } /* 0-length reads shouldn't cause any confusion */ TEST_F(Read, direct_io_read_nothing) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd; uint64_t offset = 100; char buf[80]; expect_lookup(RELPATH, ino, offset + 1000); expect_open(ino, FOPEN_DIRECT_IO, 1); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(0, pread(fd, buf, 0, offset)) << strerror(errno); leak(fd); } /* * With direct_io, reads should not fill the cache. They should go straight to * the daemon */ TEST_F(Read, direct_io_pread) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; uint64_t offset = 100; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, offset + bufsize); expect_open(ino, FOPEN_DIRECT_IO, 1); expect_read(ino, offset, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, offset)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); // With FOPEN_DIRECT_IO, the cache should be bypassed. The server will // get a 2nd read request. expect_read(ino, offset, bufsize, bufsize, CONTENTS); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, offset)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } /* * With direct_io, filesystems are allowed to return less data than is * requested. fuse(4) should return a short read to userland. */ TEST_F(Read, direct_io_short_read) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefghijklmnop"; uint64_t ino = 42; int fd; uint64_t offset = 100; ssize_t bufsize = strlen(CONTENTS); ssize_t halfbufsize = bufsize / 2; uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, offset + bufsize); expect_open(ino, FOPEN_DIRECT_IO, 1); expect_read(ino, offset, bufsize, halfbufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(halfbufsize, pread(fd, buf, bufsize, offset)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, halfbufsize)); leak(fd); } TEST_F(Read, eio) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ); }, Eq(true)), _) ).WillOnce(Invoke(ReturnErrno(EIO))); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(-1, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(EIO, errno); leak(fd); } /* * If the server returns a short read when direct io is not in use, that * indicates EOF, because of a server-side truncation. We should invalidate * all cached attributes. We may update the file size, */ TEST_F(Read, eof) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefghijklmnop"; uint64_t ino = 42; int fd; uint64_t offset = 100; ssize_t bufsize = strlen(CONTENTS); ssize_t partbufsize = 3 * bufsize / 4; ssize_t r; uint8_t buf[bufsize]; struct stat sb; expect_lookup(RELPATH, ino, offset + bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, offset + bufsize, offset + partbufsize, CONTENTS); expect_getattr(ino, offset + partbufsize); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); r = pread(fd, buf, bufsize, offset); ASSERT_LE(0, r) << strerror(errno); EXPECT_EQ(partbufsize, r) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)); EXPECT_EQ((off_t)(offset + partbufsize), sb.st_size); leak(fd); } /* Like Read.eof, but causes an entire buffer to be invalidated */ TEST_F(Read, eof_of_whole_buffer) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefghijklmnop"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); off_t old_filesize = m_maxbcachebuf * 2 + bufsize; uint8_t buf[bufsize]; struct stat sb; expect_lookup(RELPATH, ino, old_filesize); expect_open(ino, 0, 1); expect_read(ino, 2 * m_maxbcachebuf, bufsize, bufsize, CONTENTS); expect_read(ino, m_maxbcachebuf, m_maxbcachebuf, 0, CONTENTS); expect_getattr(ino, m_maxbcachebuf); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* Cache the third block */ ASSERT_EQ(bufsize, pread(fd, buf, bufsize, m_maxbcachebuf * 2)) << strerror(errno); /* Try to read the 2nd block, but it's past EOF */ ASSERT_EQ(0, pread(fd, buf, bufsize, m_maxbcachebuf)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb)); EXPECT_EQ((off_t)(m_maxbcachebuf), sb.st_size); leak(fd); } /* * With the keep_cache option, the kernel may keep its read cache across * multiple open(2)s. */ TEST_F(Read, keep_cache) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd0, fd1; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; FuseTest::expect_lookup(RELPATH, ino, S_IFREG | 0644, bufsize, 2); expect_open(ino, FOPEN_KEEP_CACHE, 2); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd0 = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd0) << strerror(errno); ASSERT_EQ(bufsize, read(fd0, buf, bufsize)) << strerror(errno); fd1 = open(FULLPATH, O_RDWR); ASSERT_LE(0, fd1) << strerror(errno); /* * This read should be serviced by cache, even though it's on the other * file descriptor */ ASSERT_EQ(bufsize, read(fd1, buf, bufsize)) << strerror(errno); leak(fd0); leak(fd1); } /* * Without the keep_cache option, the kernel should drop its read caches on * every open */ TEST_F(Read, keep_cache_disabled) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd0, fd1; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; FuseTest::expect_lookup(RELPATH, ino, S_IFREG | 0644, bufsize, 2); expect_open(ino, 0, 2); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd0 = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd0) << strerror(errno); ASSERT_EQ(bufsize, read(fd0, buf, bufsize)) << strerror(errno); fd1 = open(FULLPATH, O_RDWR); ASSERT_LE(0, fd1) << strerror(errno); /* * This read should not be serviced by cache, even though it's on the * original file descriptor */ expect_read(ino, 0, bufsize, bufsize, CONTENTS); ASSERT_EQ(0, lseek(fd0, 0, SEEK_SET)) << strerror(errno); ASSERT_EQ(bufsize, read(fd0, buf, bufsize)) << strerror(errno); leak(fd0); leak(fd1); } TEST_F(Read, mmap) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t len; size_t bufsize = strlen(CONTENTS); void *p; len = getpagesize(); expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == Read::FH && in.body.read.offset == 0 && in.body.read.size == bufsize); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { out.header.len = sizeof(struct fuse_out_header) + bufsize; memmove(out.body.bytes, CONTENTS, bufsize); }))); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); p = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); ASSERT_NE(MAP_FAILED, p) << strerror(errno); ASSERT_EQ(0, memcmp(p, CONTENTS, bufsize)); ASSERT_EQ(0, munmap(p, len)) << strerror(errno); leak(fd); } /* * The kernel should not update the cached atime attribute during a read, if * MNT_NOATIME is used. */ TEST_F(ReadNoatime, atime) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb1, sb2; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb1)); nap(); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb2)); /* The kernel should not update atime during read */ EXPECT_TRUE(timespeccmp(&sb1.st_atim, &sb2.st_atim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_ctim, &sb2.st_ctim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_mtim, &sb2.st_mtim, ==)); leak(fd); } /* * The kernel should not update the cached atime attribute during a cached * read, if MNT_NOATIME is used. */ TEST_F(ReadNoatime, atime_cached) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct stat sb1, sb2; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb1)); nap(); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, 0)) << strerror(errno); ASSERT_EQ(0, fstat(fd, &sb2)); /* The kernel should automatically update atime during read */ EXPECT_TRUE(timespeccmp(&sb1.st_atim, &sb2.st_atim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_ctim, &sb2.st_ctim, ==)); EXPECT_TRUE(timespeccmp(&sb1.st_mtim, &sb2.st_mtim, ==)); leak(fd); } /* Read of an mmap()ed file fails */ TEST_F(ReadSigbus, mmap_eio) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct sigaction sa; uint64_t ino = 42; int fd; ssize_t len; size_t bufsize = strlen(CONTENTS); void *p; len = getpagesize(); expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == Read::FH); }, Eq(true)), _) ).WillRepeatedly(Invoke(ReturnErrno(EIO))); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); p = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); ASSERT_NE(MAP_FAILED, p) << strerror(errno); /* Accessing the mapped page should return SIGBUS. */ bzero(&sa, sizeof(sa)); sa.sa_handler = SIG_DFL; sa.sa_sigaction = handle_sigbus; sa.sa_flags = SA_RESETHAND | SA_SIGINFO; ASSERT_EQ(0, sigaction(SIGBUS, &sa, NULL)) << strerror(errno); if (setjmp(ReadSigbus::s_jmpbuf) == 0) { atomic_signal_fence(std::memory_order::memory_order_seq_cst); volatile char x __unused = *(volatile char*)p; FAIL() << "shouldn't get here"; } ASSERT_EQ(p, ReadSigbus::s_si_addr); ASSERT_EQ(0, munmap(p, len)) << strerror(errno); leak(fd); } /* * A read via mmap comes up short, indicating that the file was truncated * server-side. */ TEST_F(Read, mmap_eof) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t len; size_t bufsize = strlen(CONTENTS); struct stat sb; void *p; len = getpagesize(); expect_lookup(RELPATH, ino, m_maxbcachebuf); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == Read::FH && in.body.read.offset == 0 && in.body.read.size == (uint32_t)m_maxbcachebuf); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { out.header.len = sizeof(struct fuse_out_header) + bufsize; memmove(out.body.bytes, CONTENTS, bufsize); }))); expect_getattr(ino, bufsize); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); p = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); ASSERT_NE(MAP_FAILED, p) << strerror(errno); /* The file size should be automatically truncated */ ASSERT_EQ(0, memcmp(p, CONTENTS, bufsize)); ASSERT_EQ(0, fstat(fd, &sb)) << strerror(errno); EXPECT_EQ((off_t)bufsize, sb.st_size); ASSERT_EQ(0, munmap(p, len)) << strerror(errno); leak(fd); } /* * During VOP_GETPAGES, the FUSE server fails a FUSE_GETATTR operation. This * almost certainly indicates a buggy FUSE server, and our goal should be not * to panic. Instead, generate SIGBUS. */ TEST_F(ReadSigbus, mmap_getblksz_fail) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; struct sigaction sa; Sequence seq; uint64_t ino = 42; int fd; ssize_t len; size_t bufsize = strlen(CONTENTS); mode_t mode = S_IFREG | 0644; void *p; len = getpagesize(); FuseTest::expect_lookup(RELPATH, ino, mode, bufsize, 1, 0); /* Expect two GETATTR calls that succeed, followed by one that fail. */ EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_GETATTR && in.header.nodeid == ino); }, Eq(true)), _) ).Times(2) .InSequence(seq) .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; out.body.attr.attr.mode = mode; out.body.attr.attr.size = bufsize; out.body.attr.attr_valid = 0; }))); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_GETATTR && in.header.nodeid == ino); }, Eq(true)), _) ).InSequence(seq) .WillRepeatedly(Invoke(ReturnErrno(EIO))); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ); }, Eq(true)), _) ).Times(0); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); p = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); ASSERT_NE(MAP_FAILED, p) << strerror(errno); /* Accessing the mapped page should return SIGBUS. */ bzero(&sa, sizeof(sa)); sa.sa_handler = SIG_DFL; sa.sa_sigaction = handle_sigbus; sa.sa_flags = SA_RESETHAND | SA_SIGINFO; ASSERT_EQ(0, sigaction(SIGBUS, &sa, NULL)) << strerror(errno); if (setjmp(ReadSigbus::s_jmpbuf) == 0) { atomic_signal_fence(std::memory_order::memory_order_seq_cst); volatile char x __unused = *(volatile char*)p; FAIL() << "shouldn't get here"; } ASSERT_EQ(p, ReadSigbus::s_si_addr); ASSERT_EQ(0, munmap(p, len)) << strerror(errno); leak(fd); } /* * Just as when FOPEN_DIRECT_IO is used, reads with O_DIRECT should bypass * cache and to straight to the daemon */ TEST_F(Read, o_direct) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); // Fill the cache ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); // Reads with o_direct should bypass the cache expect_read(ino, 0, bufsize, bufsize, CONTENTS); ASSERT_EQ(0, fcntl(fd, F_SETFL, O_DIRECT)) << strerror(errno); ASSERT_EQ(0, lseek(fd, 0, SEEK_SET)) << strerror(errno); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } TEST_F(Read, pread) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; /* * Set offset to a maxbcachebuf boundary so we'll be sure what offset * to read from. Without this, the read might start at a lower offset. */ uint64_t offset = m_maxbcachebuf; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, offset + bufsize); expect_open(ino, 0, 1); expect_read(ino, offset, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, pread(fd, buf, bufsize, offset)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } TEST_F(Read, read) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } TEST_F(Read_7_8, read) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); leak(fd); } /* * If cacheing is enabled, the kernel should try to read an entire cache block * at a time. */ TEST_F(Read, cache_block) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS0 = "abcdefghijklmnop"; uint64_t ino = 42; int fd; ssize_t bufsize = 8; ssize_t filesize = m_maxbcachebuf * 2; char *contents; char buf[bufsize]; const char *contents1 = CONTENTS0 + bufsize; contents = (char*)calloc(1, filesize); ASSERT_NE(nullptr, contents); memmove(contents, CONTENTS0, strlen(CONTENTS0)); expect_lookup(RELPATH, ino, filesize); expect_open(ino, 0, 1); expect_read(ino, 0, m_maxbcachebuf, m_maxbcachebuf, contents); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS0, bufsize)); /* A subsequent read should be serviced by cache */ ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, contents1, bufsize)); leak(fd); free(contents); } /* Reading with sendfile should work (though it obviously won't be 0-copy) */ TEST_F(Read, sendfile) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; size_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; int sp[2]; off_t sbytes; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ && in.header.nodeid == ino && in.body.read.fh == Read::FH && in.body.read.offset == 0 && in.body.read.size == bufsize); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { out.header.len = sizeof(struct fuse_out_header) + bufsize; memmove(out.body.bytes, CONTENTS, bufsize); }))); ASSERT_EQ(0, socketpair(PF_LOCAL, SOCK_STREAM, 0, sp)) << strerror(errno); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(0, sendfile(fd, sp[1], 0, bufsize, NULL, &sbytes, 0)) << strerror(errno); ASSERT_EQ(static_cast(bufsize), read(sp[0], buf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(buf, CONTENTS, bufsize)); close(sp[1]); close(sp[0]); leak(fd); } /* sendfile should fail gracefully if fuse declines the read */ /* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236466 */ TEST_F(Read, sendfile_eio) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; uint64_t ino = 42; int fd; ssize_t bufsize = strlen(CONTENTS); int sp[2]; off_t sbytes; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { return (in.header.opcode == FUSE_READ); }, Eq(true)), _) ).WillOnce(Invoke(ReturnErrno(EIO))); ASSERT_EQ(0, socketpair(PF_LOCAL, SOCK_STREAM, 0, sp)) << strerror(errno); fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); ASSERT_NE(0, sendfile(fd, sp[1], 0, bufsize, NULL, &sbytes, 0)); close(sp[1]); close(sp[0]); leak(fd); } /* * Sequential reads should use readahead. And if allowed, large reads should * be clustered. */ TEST_P(ReadAhead, readahead) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; uint64_t ino = 42; int fd, maxcontig, clustersize; ssize_t bufsize = 4 * m_maxbcachebuf; ssize_t filesize = bufsize; uint64_t len; char *rbuf, *contents; off_t offs; contents = (char*)malloc(filesize); ASSERT_NE(nullptr, contents); memset(contents, 'X', filesize); rbuf = (char*)calloc(1, bufsize); expect_lookup(RELPATH, ino, filesize); expect_open(ino, 0, 1); maxcontig = m_noclusterr ? m_maxbcachebuf : m_maxbcachebuf + m_maxreadahead; clustersize = MIN(maxcontig, m_maxphys); for (offs = 0; offs < bufsize; offs += clustersize) { len = std::min((size_t)clustersize, (size_t)(filesize - offs)); expect_read(ino, offs, len, len, contents + offs); } fd = open(FULLPATH, O_RDONLY); ASSERT_LE(0, fd) << strerror(errno); /* Set the internal readahead counter to a "large" value */ ASSERT_EQ(0, fcntl(fd, F_READAHEAD, 1'000'000'000)) << strerror(errno); ASSERT_EQ(bufsize, read(fd, rbuf, bufsize)) << strerror(errno); ASSERT_EQ(0, memcmp(rbuf, contents, bufsize)); leak(fd); free(rbuf); free(contents); } INSTANTIATE_TEST_SUITE_P(RA, ReadAhead, Values(tuple(false, 0), tuple(false, 1), tuple(false, 2), tuple(false, 3), tuple(true, 0), tuple(true, 1), tuple(true, 2))); +/* With read-only mounts, fuse should never update atime during close */ +TEST_F(RofsRead, atime_during_close) +{ + const char FULLPATH[] = "mountpoint/some_file.txt"; + const char RELPATH[] = "some_file.txt"; + const char *CONTENTS = "abcdefgh"; + uint64_t ino = 42; + int fd; + ssize_t bufsize = strlen(CONTENTS); + uint8_t buf[bufsize]; + + expect_lookup(RELPATH, ino, bufsize); + expect_open(ino, 0, 1); + expect_read(ino, 0, bufsize, bufsize, CONTENTS); + EXPECT_CALL(*m_mock, process( + ResultOf([&](auto in) { + return (in.header.opcode == FUSE_SETATTR); + }, Eq(true)), + _) + ).Times(0); + expect_flush(ino, 1, ReturnErrno(0)); + expect_release(ino, FuseTest::FH); + + fd = open(FULLPATH, O_RDONLY); + ASSERT_LE(0, fd) << strerror(errno); + + /* Ensure atime will be different than during lookup */ + nap(); + + ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); + + close(fd); +} + /* fuse_init_out.time_gran controls the granularity of timestamps */ TEST_P(TimeGran, atime_during_setattr) { const char FULLPATH[] = "mountpoint/some_file.txt"; const char RELPATH[] = "some_file.txt"; const char *CONTENTS = "abcdefgh"; ssize_t bufsize = strlen(CONTENTS); uint8_t buf[bufsize]; uint64_t ino = 42; const mode_t newmode = 0755; int fd; expect_lookup(RELPATH, ino, bufsize); expect_open(ino, 0, 1); expect_read(ino, 0, bufsize, bufsize, CONTENTS); EXPECT_CALL(*m_mock, process( ResultOf([=](auto in) { uint32_t valid = FATTR_MODE | FATTR_ATIME; return (in.header.opcode == FUSE_SETATTR && in.header.nodeid == ino && in.body.setattr.valid == valid && in.body.setattr.atimensec % m_time_gran == 0); }, Eq(true)), _) ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { SET_OUT_HEADER_LEN(out, attr); out.body.attr.attr.ino = ino; out.body.attr.attr.mode = S_IFREG | newmode; }))); fd = open(FULLPATH, O_RDWR); ASSERT_LE(0, fd) << strerror(errno); ASSERT_EQ(bufsize, read(fd, buf, bufsize)) << strerror(errno); ASSERT_EQ(0, fchmod(fd, newmode)) << strerror(errno); leak(fd); } INSTANTIATE_TEST_SUITE_P(TG, TimeGran, Range(0u, 10u));