Index: head/sys/fs/ext2fs/ext2_dir.h =================================================================== --- head/sys/fs/ext2fs/ext2_dir.h (revision 320210) +++ head/sys/fs/ext2fs/ext2_dir.h (revision 320211) @@ -1,101 +1,102 @@ /*- * Copyright (c) 2009 Aditya Sarawgi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE 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. * * $FreeBSD$ */ #ifndef _FS_EXT2FS_EXT2_DIR_H_ #define _FS_EXT2FS_EXT2_DIR_H_ /* * Structure of a directory entry */ #define EXT2FS_MAXNAMLEN 255 struct ext2fs_direct { uint32_t e2d_ino; /* inode number of entry */ uint16_t e2d_reclen; /* length of this record */ uint16_t e2d_namlen; /* length of string in e2d_name */ char e2d_name[EXT2FS_MAXNAMLEN];/* name with length<=EXT2FS_MAXNAMLEN */ }; enum slotstatus { NONE, COMPACT, FOUND }; struct ext2fs_searchslot { enum slotstatus slotstatus; doff_t slotoffset; /* offset of area with free space */ int slotsize; /* size of area at slotoffset */ int slotfreespace; /* amount of space free in slot */ int slotneeded; /* sizeof the entry we are seeking */ }; /* * The new version of the directory entry. Since EXT2 structures are * stored in intel byte order, and the name_len field could never be * bigger than 255 chars, it's safe to reclaim the extra byte for the * file_type field. */ struct ext2fs_direct_2 { uint32_t e2d_ino; /* inode number of entry */ uint16_t e2d_reclen; /* length of this record */ uint8_t e2d_namlen; /* length of string in e2d_name */ uint8_t e2d_type; /* file type */ char e2d_name[EXT2FS_MAXNAMLEN]; /* name with * length<=EXT2FS_MAXNAMLEN */ }; /* * Maximal count of links to a file */ #define EXT2_LINK_MAX 32000 +#define EXT4_LINK_MAX 65000 /* * Ext2 directory file types. Only the low 3 bits are used. The * other bits are reserved for now. */ #define EXT2_FT_UNKNOWN 0 #define EXT2_FT_REG_FILE 1 #define EXT2_FT_DIR 2 #define EXT2_FT_CHRDEV 3 #define EXT2_FT_BLKDEV 4 #define EXT2_FT_FIFO 5 #define EXT2_FT_SOCK 6 #define EXT2_FT_SYMLINK 7 #define EXT2_FT_MAX 8 /* * EXT2_DIR_PAD defines the directory entries boundaries * * NOTE: It must be a multiple of 4 */ #define EXT2_DIR_PAD 4 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ ~EXT2_DIR_ROUND) #endif /* !_FS_EXT2FS_EXT2_DIR_H_ */ Index: head/sys/fs/ext2fs/ext2_vnops.c =================================================================== --- head/sys/fs/ext2fs/ext2_vnops.c (revision 320210) +++ head/sys/fs/ext2fs/ext2_vnops.c (revision 320211) @@ -1,2411 +1,2444 @@ /*- * modified for EXT2FS support in Lites 1.1 * * Aug 1995, Godmar Back (gback@cs.utah.edu) * University of Utah, Department of Computer Science */ /*- * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)ufs_vnops.c 8.7 (Berkeley) 2/3/94 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95 * $FreeBSD$ */ #include "opt_suiddir.h" #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 "opt_directio.h" #include #include #include #include #include #include #include #include #include #include static int ext2_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *); static void ext2_itimes_locked(struct vnode *); static int ext4_ext_read(struct vop_read_args *); static int ext2_ind_read(struct vop_read_args *); static vop_access_t ext2_access; static int ext2_chmod(struct vnode *, int, struct ucred *, struct thread *); static int ext2_chown(struct vnode *, uid_t, gid_t, struct ucred *, struct thread *); static vop_close_t ext2_close; static vop_create_t ext2_create; static vop_fsync_t ext2_fsync; static vop_getattr_t ext2_getattr; static vop_ioctl_t ext2_ioctl; static vop_link_t ext2_link; static vop_mkdir_t ext2_mkdir; static vop_mknod_t ext2_mknod; static vop_open_t ext2_open; static vop_pathconf_t ext2_pathconf; static vop_print_t ext2_print; static vop_read_t ext2_read; static vop_readlink_t ext2_readlink; static vop_remove_t ext2_remove; static vop_rename_t ext2_rename; static vop_rmdir_t ext2_rmdir; static vop_setattr_t ext2_setattr; static vop_strategy_t ext2_strategy; static vop_symlink_t ext2_symlink; static vop_write_t ext2_write; static vop_deleteextattr_t ext2_deleteextattr; static vop_getextattr_t ext2_getextattr; static vop_listextattr_t ext2_listextattr; static vop_setextattr_t ext2_setextattr; static vop_vptofh_t ext2_vptofh; static vop_close_t ext2fifo_close; static vop_kqfilter_t ext2fifo_kqfilter; /* Global vfs data structures for ext2. */ struct vop_vector ext2_vnodeops = { .vop_default = &default_vnodeops, .vop_access = ext2_access, .vop_bmap = ext2_bmap, .vop_cachedlookup = ext2_lookup, .vop_close = ext2_close, .vop_create = ext2_create, .vop_fsync = ext2_fsync, .vop_getpages = vnode_pager_local_getpages, .vop_getpages_async = vnode_pager_local_getpages_async, .vop_getattr = ext2_getattr, .vop_inactive = ext2_inactive, .vop_ioctl = ext2_ioctl, .vop_link = ext2_link, .vop_lookup = vfs_cache_lookup, .vop_mkdir = ext2_mkdir, .vop_mknod = ext2_mknod, .vop_open = ext2_open, .vop_pathconf = ext2_pathconf, .vop_poll = vop_stdpoll, .vop_print = ext2_print, .vop_read = ext2_read, .vop_readdir = ext2_readdir, .vop_readlink = ext2_readlink, .vop_reallocblks = ext2_reallocblks, .vop_reclaim = ext2_reclaim, .vop_remove = ext2_remove, .vop_rename = ext2_rename, .vop_rmdir = ext2_rmdir, .vop_setattr = ext2_setattr, .vop_strategy = ext2_strategy, .vop_symlink = ext2_symlink, .vop_write = ext2_write, .vop_deleteextattr = ext2_deleteextattr, .vop_getextattr = ext2_getextattr, .vop_listextattr = ext2_listextattr, .vop_setextattr = ext2_setextattr, #ifdef UFS_ACL .vop_getacl = ext2_getacl, .vop_setacl = ext2_setacl, .vop_aclcheck = ext2_aclcheck, #endif /* UFS_ACL */ .vop_vptofh = ext2_vptofh, }; struct vop_vector ext2_fifoops = { .vop_default = &fifo_specops, .vop_access = ext2_access, .vop_close = ext2fifo_close, .vop_fsync = ext2_fsync, .vop_getattr = ext2_getattr, .vop_inactive = ext2_inactive, .vop_kqfilter = ext2fifo_kqfilter, .vop_print = ext2_print, .vop_read = VOP_PANIC, .vop_reclaim = ext2_reclaim, .vop_setattr = ext2_setattr, .vop_write = VOP_PANIC, .vop_vptofh = ext2_vptofh, }; /* * A virgin directory (no blushing please). * Note that the type and namlen fields are reversed relative to ext2. * Also, we don't use `struct odirtemplate', since it would just cause * endianness problems. */ static struct dirtemplate mastertemplate = { 0, 12, 1, EXT2_FT_DIR, ".", 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".." }; static struct dirtemplate omastertemplate = { 0, 12, 1, EXT2_FT_UNKNOWN, ".", 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".." }; static void ext2_itimes_locked(struct vnode *vp) { struct inode *ip; struct timespec ts; ASSERT_VI_LOCKED(vp, __func__); ip = VTOI(vp); if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) return; if ((vp->v_type == VBLK || vp->v_type == VCHR)) ip->i_flag |= IN_LAZYMOD; else ip->i_flag |= IN_MODIFIED; if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { vfs_timestamp(&ts); if (ip->i_flag & IN_ACCESS) { ip->i_atime = ts.tv_sec; ip->i_atimensec = ts.tv_nsec; } if (ip->i_flag & IN_UPDATE) { ip->i_mtime = ts.tv_sec; ip->i_mtimensec = ts.tv_nsec; ip->i_modrev++; } if (ip->i_flag & IN_CHANGE) { ip->i_ctime = ts.tv_sec; ip->i_ctimensec = ts.tv_nsec; } } ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); } void ext2_itimes(struct vnode *vp) { VI_LOCK(vp); ext2_itimes_locked(vp); VI_UNLOCK(vp); } /* * Create a regular file */ static int ext2_create(struct vop_create_args *ap) { int error; error = ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), ap->a_dvp, ap->a_vpp, ap->a_cnp); if (error != 0) return (error); if ((ap->a_cnp->cn_flags & MAKEENTRY) != 0) cache_enter(ap->a_dvp, *ap->a_vpp, ap->a_cnp); return (0); } static int ext2_open(struct vop_open_args *ap) { if (ap->a_vp->v_type == VBLK || ap->a_vp->v_type == VCHR) return (EOPNOTSUPP); /* * Files marked append-only must be opened for appending. */ if ((VTOI(ap->a_vp)->i_flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) return (EPERM); vnode_create_vobject(ap->a_vp, VTOI(ap->a_vp)->i_size, ap->a_td); return (0); } /* * Close called. * * Update the times on the inode. */ static int ext2_close(struct vop_close_args *ap) { struct vnode *vp = ap->a_vp; VI_LOCK(vp); if (vp->v_usecount > 1) ext2_itimes_locked(vp); VI_UNLOCK(vp); return (0); } static int ext2_access(struct vop_access_args *ap) { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); accmode_t accmode = ap->a_accmode; int error; if (vp->v_type == VBLK || vp->v_type == VCHR) return (EOPNOTSUPP); /* * Disallow write attempts on read-only file systems; * unless the file is a socket, fifo, or a block or * character device resident on the file system. */ if (accmode & VWRITE) { switch (vp->v_type) { case VDIR: case VLNK: case VREG: if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); break; default: break; } } /* If immutable bit set, nobody gets to write it. */ if ((accmode & VWRITE) && (ip->i_flags & (SF_IMMUTABLE | SF_SNAPSHOT))) return (EPERM); error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid, ap->a_accmode, ap->a_cred, NULL); return (error); } static int ext2_getattr(struct vop_getattr_args *ap) { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct vattr *vap = ap->a_vap; ext2_itimes(vp); /* * Copy from inode table */ vap->va_fsid = dev2udev(ip->i_devvp->v_rdev); vap->va_fileid = ip->i_number; vap->va_mode = ip->i_mode & ~IFMT; vap->va_nlink = ip->i_nlink; vap->va_uid = ip->i_uid; vap->va_gid = ip->i_gid; vap->va_rdev = ip->i_rdev; vap->va_size = ip->i_size; vap->va_atime.tv_sec = ip->i_atime; vap->va_atime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_atimensec : 0; vap->va_mtime.tv_sec = ip->i_mtime; vap->va_mtime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_mtimensec : 0; vap->va_ctime.tv_sec = ip->i_ctime; vap->va_ctime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_ctimensec : 0; if E2DI_HAS_XTIME(ip) { vap->va_birthtime.tv_sec = ip->i_birthtime; vap->va_birthtime.tv_nsec = ip->i_birthnsec; } vap->va_flags = ip->i_flags; vap->va_gen = ip->i_gen; vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; vap->va_bytes = dbtob((u_quad_t)ip->i_blocks); vap->va_type = IFTOVT(ip->i_mode); vap->va_filerev = ip->i_modrev; return (0); } /* * Set attribute vnode op. called from several syscalls */ static int ext2_setattr(struct vop_setattr_args *ap) { struct vattr *vap = ap->a_vap; struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct ucred *cred = ap->a_cred; struct thread *td = curthread; int error; /* * Check for unsettable attributes. */ if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { return (EINVAL); } if (vap->va_flags != VNOVAL) { /* Disallow flags not supported by ext2fs. */ if (vap->va_flags & ~(SF_APPEND | SF_IMMUTABLE | UF_NODUMP)) return (EOPNOTSUPP); if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); /* * Callers may only modify the file flags on objects they * have VADMIN rights for. */ if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) return (error); /* * Unprivileged processes and privileged processes in * jail() are not permitted to unset system flags, or * modify flags if any system flags are set. * Privileged non-jail processes may not modify system flags * if securelevel > 0 and any existing system flags are set. */ if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0)) { if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) { error = securelevel_gt(cred, 0); if (error) return (error); } } else { if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND) || ((vap->va_flags ^ ip->i_flags) & SF_SETTABLE)) return (EPERM); } ip->i_flags = vap->va_flags; ip->i_flag |= IN_CHANGE; if (ip->i_flags & (IMMUTABLE | APPEND)) return (0); } if (ip->i_flags & (IMMUTABLE | APPEND)) return (EPERM); /* * Go through the fields and update iff not VNOVAL. */ if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred, td)) != 0) return (error); } if (vap->va_size != VNOVAL) { /* * Disallow write attempts on read-only file systems; * unless the file is a socket, fifo, or a block or * character device resident on the file system. */ switch (vp->v_type) { case VDIR: return (EISDIR); case VLNK: case VREG: if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); break; default: break; } if ((error = ext2_truncate(vp, vap->va_size, 0, cred, td)) != 0) return (error); } if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); /* * From utimes(2): * If times is NULL, ... The caller must be the owner of * the file, have permission to write the file, or be the * super-user. * If times is non-NULL, ... The caller must be the owner of * the file or be the super-user. */ if ((error = VOP_ACCESS(vp, VADMIN, cred, td)) && ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || (error = VOP_ACCESS(vp, VWRITE, cred, td)))) return (error); ip->i_flag |= IN_CHANGE | IN_MODIFIED; if (vap->va_atime.tv_sec != VNOVAL) { ip->i_flag &= ~IN_ACCESS; ip->i_atime = vap->va_atime.tv_sec; ip->i_atimensec = vap->va_atime.tv_nsec; } if (vap->va_mtime.tv_sec != VNOVAL) { ip->i_flag &= ~IN_UPDATE; ip->i_mtime = vap->va_mtime.tv_sec; ip->i_mtimensec = vap->va_mtime.tv_nsec; } ip->i_birthtime = vap->va_birthtime.tv_sec; ip->i_birthnsec = vap->va_birthtime.tv_nsec; error = ext2_update(vp, 0); if (error) return (error); } error = 0; if (vap->va_mode != (mode_t)VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); error = ext2_chmod(vp, (int)vap->va_mode, cred, td); } return (error); } /* * Change the mode on a file. * Inode must be locked before calling. */ static int ext2_chmod(struct vnode *vp, int mode, struct ucred *cred, struct thread *td) { struct inode *ip = VTOI(vp); int error; /* * To modify the permissions on a file, must possess VADMIN * for that file. */ if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) return (error); /* * Privileged processes may set the sticky bit on non-directories, * as well as set the setgid bit on a file with a group that the * process is not a member of. */ if (vp->v_type != VDIR && (mode & S_ISTXT)) { error = priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0); if (error) return (EFTYPE); } if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) { error = priv_check_cred(cred, PRIV_VFS_SETGID, 0); if (error) return (error); } ip->i_mode &= ~ALLPERMS; ip->i_mode |= (mode & ALLPERMS); ip->i_flag |= IN_CHANGE; return (0); } /* * Perform chown operation on inode ip; * inode must be locked prior to call. */ static int ext2_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred, struct thread *td) { struct inode *ip = VTOI(vp); uid_t ouid; gid_t ogid; int error = 0; if (uid == (uid_t)VNOVAL) uid = ip->i_uid; if (gid == (gid_t)VNOVAL) gid = ip->i_gid; /* * To modify the ownership of a file, must possess VADMIN * for that file. */ if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) return (error); /* * To change the owner of a file, or change the group of a file * to a group of which we are not a member, the caller must * have privilege. */ if (uid != ip->i_uid || (gid != ip->i_gid && !groupmember(gid, cred))) { error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); if (error) return (error); } ogid = ip->i_gid; ouid = ip->i_uid; ip->i_gid = gid; ip->i_uid = uid; ip->i_flag |= IN_CHANGE; if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) { if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID, 0) != 0) ip->i_mode &= ~(ISUID | ISGID); } return (0); } /* * Synch an open file. */ /* ARGSUSED */ static int ext2_fsync(struct vop_fsync_args *ap) { /* * Flush all dirty buffers associated with a vnode. */ vop_stdfsync(ap); return (ext2_update(ap->a_vp, ap->a_waitfor == MNT_WAIT)); } /* * Mknod vnode call */ /* ARGSUSED */ static int ext2_mknod(struct vop_mknod_args *ap) { struct vattr *vap = ap->a_vap; struct vnode **vpp = ap->a_vpp; struct inode *ip; ino_t ino; int error; error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), ap->a_dvp, vpp, ap->a_cnp); if (error) return (error); ip = VTOI(*vpp); ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; if (vap->va_rdev != VNOVAL) { /* * Want to be able to use this to make badblock * inodes, so don't truncate the dev number. */ ip->i_rdev = vap->va_rdev; } /* * Remove inode, then reload it through VFS_VGET so it is * checked to see if it is an alias of an existing entry in * the inode cache. XXX I don't believe this is necessary now. */ (*vpp)->v_type = VNON; ino = ip->i_number; /* Save this before vgone() invalidates ip. */ vgone(*vpp); vput(*vpp); error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp); if (error) { *vpp = NULL; return (error); } return (0); } static int ext2_remove(struct vop_remove_args *ap) { struct inode *ip; struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; int error; ip = VTOI(vp); if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (VTOI(dvp)->i_flags & APPEND)) { error = EPERM; goto out; } error = ext2_dirremove(dvp, ap->a_cnp); if (error == 0) { ip->i_nlink--; ip->i_flag |= IN_CHANGE; } out: return (error); } +static unsigned short +ext2_max_nlink(struct inode *ip) +{ + struct m_ext2fs *fs; + + fs = ip->i_e2fs; + + if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_DIR_NLINK)) + return (EXT4_LINK_MAX); + else + return (EXT2_LINK_MAX); +} + /* * link vnode call */ static int ext2_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 inode *ip; int error; #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("ext2_link: no name"); #endif ip = VTOI(vp); - if ((nlink_t)ip->i_nlink >= EXT2_LINK_MAX) { + if ((nlink_t)ip->i_nlink >= ext2_max_nlink(ip)) { error = EMLINK; goto out; } if (ip->i_flags & (IMMUTABLE | APPEND)) { error = EPERM; goto out; } ip->i_nlink++; ip->i_flag |= IN_CHANGE; error = ext2_update(vp, !DOINGASYNC(vp)); if (!error) error = ext2_direnter(ip, tdvp, cnp); if (error) { ip->i_nlink--; ip->i_flag |= IN_CHANGE; } out: return (error); } +static int +ext2_inc_nlink(struct inode *ip) +{ + + ip->i_nlink++; + + if (ext2_htree_has_idx(ip) && ip->i_nlink > 1) { + if (ip->i_nlink >= ext2_max_nlink(ip) || ip->i_nlink == 2) + ip->i_nlink = 1; + } else if (ip->i_nlink > ext2_max_nlink(ip)) { + ip->i_nlink--; + return (EMLINK); + } + + return (0); +} + +static void +ext2_dec_nlink(struct inode *ip) +{ + + if (!S_ISDIR(ip->i_mode) || ip->i_nlink > 2) + ip->i_nlink--; +} + /* * Rename system call. * rename("foo", "bar"); * is essentially * unlink("bar"); * link("foo", "bar"); * unlink("foo"); * but ``atomically''. Can't do full commit without saving state in the * inode on disk which isn't feasible at this time. Best we can do is * always guarantee the target exists. * * Basic algorithm is: * * 1) Bump link count on source while we're linking it to the * target. This also ensure the inode won't be deleted out * from underneath us while we work (it may be truncated by * a concurrent `trunc' or `open' for creation). * 2) Link source to destination. If destination already exists, * delete it first. * 3) Unlink source reference to inode if still around. If a * directory was moved and the parent of the destination * is different from the source, patch the ".." entry in the * directory. */ static int ext2_rename(struct vop_rename_args *ap) { struct vnode *tvp = ap->a_tvp; struct vnode *tdvp = ap->a_tdvp; struct vnode *fvp = ap->a_fvp; struct vnode *fdvp = ap->a_fdvp; struct componentname *tcnp = ap->a_tcnp; struct componentname *fcnp = ap->a_fcnp; struct inode *ip, *xp, *dp; struct dirtemplate dirbuf; int doingdirectory = 0, oldparent = 0, newparent = 0; int error = 0; u_char namlen; #ifdef INVARIANTS if ((tcnp->cn_flags & HASBUF) == 0 || (fcnp->cn_flags & HASBUF) == 0) panic("ext2_rename: no name"); #endif /* * Check for cross-device rename. */ if ((fvp->v_mount != tdvp->v_mount) || (tvp && (fvp->v_mount != tvp->v_mount))) { error = EXDEV; abortit: if (tdvp == tvp) vrele(tdvp); else vput(tdvp); if (tvp) vput(tvp); vrele(fdvp); vrele(fvp); return (error); } if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (VTOI(tdvp)->i_flags & APPEND))) { error = EPERM; goto abortit; } /* * Renaming a file to itself has no effect. The upper layers should * not call us in that case. Temporarily just warn if they do. */ if (fvp == tvp) { printf("ext2_rename: fvp == tvp (can't happen)\n"); error = 0; goto abortit; } if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) goto abortit; dp = VTOI(fdvp); ip = VTOI(fvp); - if (ip->i_nlink >= EXT2_LINK_MAX) { + if (ip->i_nlink >= ext2_max_nlink(ip) && !ext2_htree_has_idx(ip)) { VOP_UNLOCK(fvp, 0); error = EMLINK; goto abortit; } if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (dp->i_flags & APPEND)) { VOP_UNLOCK(fvp, 0); error = EPERM; goto abortit; } if ((ip->i_mode & IFMT) == IFDIR) { /* * Avoid ".", "..", and aliases of "." for obvious reasons. */ if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT || (ip->i_flag & IN_RENAME)) { VOP_UNLOCK(fvp, 0); error = EINVAL; goto abortit; } ip->i_flag |= IN_RENAME; oldparent = dp->i_number; doingdirectory++; } vrele(fdvp); /* * When the target exists, both the directory * and target vnodes are returned locked. */ dp = VTOI(tdvp); xp = NULL; if (tvp) xp = VTOI(tvp); /* * 1) Bump link count while we're moving stuff * around. If we crash somewhere before * completing our work, the link count * may be wrong, but correctable. */ - ip->i_nlink++; + ext2_inc_nlink(ip); ip->i_flag |= IN_CHANGE; if ((error = ext2_update(fvp, !DOINGASYNC(fvp))) != 0) { VOP_UNLOCK(fvp, 0); goto bad; } /* * If ".." must be changed (ie the directory gets a new * parent) then the source directory must not be in the * directory hierarchy above the target, as this would * orphan everything below the source directory. Also * the user must have write permission in the source so * as to be able to change "..". We must repeat the call * to namei, as the parent directory is unlocked by the * call to checkpath(). */ error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); VOP_UNLOCK(fvp, 0); if (oldparent != dp->i_number) newparent = dp->i_number; if (doingdirectory && newparent) { if (error) /* write access check above */ goto bad; if (xp != NULL) vput(tvp); error = ext2_checkpath(ip, dp, tcnp->cn_cred); if (error) goto out; VREF(tdvp); error = relookup(tdvp, &tvp, tcnp); if (error) goto out; vrele(tdvp); dp = VTOI(tdvp); xp = NULL; if (tvp) xp = VTOI(tvp); } /* * 2) If target doesn't exist, link the target * to the source and unlink the source. * Otherwise, rewrite the target directory * entry to reference the source inode and * expunge the original entry's existence. */ if (xp == NULL) { if (dp->i_devvp != ip->i_devvp) panic("ext2_rename: EXDEV"); /* * Account for ".." in new directory. * When source and destination have the same * parent we don't fool with the link count. */ if (doingdirectory && newparent) { - if ((nlink_t)dp->i_nlink >= EXT2_LINK_MAX) { - error = EMLINK; + error = ext2_inc_nlink(dp); + if (error) goto bad; - } - dp->i_nlink++; + dp->i_flag |= IN_CHANGE; error = ext2_update(tdvp, !DOINGASYNC(tdvp)); if (error) goto bad; } error = ext2_direnter(ip, tdvp, tcnp); if (error) { if (doingdirectory && newparent) { - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; (void)ext2_update(tdvp, 1); } goto bad; } vput(tdvp); } else { if (xp->i_devvp != dp->i_devvp || xp->i_devvp != ip->i_devvp) panic("ext2_rename: EXDEV"); /* * Short circuit rename(foo, foo). */ if (xp->i_number == ip->i_number) panic("ext2_rename: same file"); /* * If the parent directory is "sticky", then the user must * own the parent directory, or the destination of the rename, * otherwise the destination may not be changed (except by * root). This implements append-only directories. */ if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && tcnp->cn_cred->cr_uid != dp->i_uid && xp->i_uid != tcnp->cn_cred->cr_uid) { error = EPERM; goto bad; } /* * Target must be empty if a directory and have no links * to it. Also, ensure source and target are compatible * (both directories, or both not directories). */ if ((xp->i_mode & IFMT) == IFDIR) { - if (!ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) || - xp->i_nlink > 2) { + if (!ext2_dirempty(xp, dp->i_number, tcnp->cn_cred)) { error = ENOTEMPTY; goto bad; } if (!doingdirectory) { error = ENOTDIR; goto bad; } cache_purge(tdvp); } else if (doingdirectory) { error = EISDIR; goto bad; } error = ext2_dirrewrite(dp, ip, tcnp); if (error) goto bad; /* * If the target directory is in the same * directory as the source directory, * decrement the link count on the parent * of the target directory. */ if (doingdirectory && !newparent) { - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; } vput(tdvp); /* * Adjust the link count of the target to * reflect the dirrewrite above. If this is * a directory it is empty and there are * no links to it, so we can squash the inode and * any space associated with it. We disallowed * renaming over top of a directory with links to * it above, as the remaining link would point to * a directory without "." or ".." entries. */ - xp->i_nlink--; + ext2_dec_nlink(xp); if (doingdirectory) { if (--xp->i_nlink != 0) panic("ext2_rename: linked directory"); error = ext2_truncate(tvp, (off_t)0, IO_SYNC, tcnp->cn_cred, tcnp->cn_thread); } xp->i_flag |= IN_CHANGE; vput(tvp); xp = NULL; } /* * 3) Unlink the source. */ fcnp->cn_flags &= ~MODMASK; fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; VREF(fdvp); error = relookup(fdvp, &fvp, fcnp); if (error == 0) vrele(fdvp); if (fvp != NULL) { xp = VTOI(fvp); dp = VTOI(fdvp); } else { /* * From name has disappeared. IN_RENAME is not sufficient * to protect against directory races due to timing windows, * so we can't panic here. */ vrele(ap->a_fvp); return (0); } /* * Ensure that the directory entry still exists and has not * changed while the new name has been entered. If the source is * a file then the entry may have been unlinked or renamed. In * either case there is no further work to be done. If the source * is a directory then it cannot have been rmdir'ed; its link * count of three would cause a rmdir to fail with ENOTEMPTY. * The IN_RENAME flag ensures that it cannot be moved by another * rename. */ if (xp != ip) { /* * From name resolves to a different inode. IN_RENAME is * not sufficient protection against timing window races * so we can't panic here. */ } else { /* * If the source is a directory with a * new parent, the link count of the old * parent directory must be decremented * and ".." set to point to the new parent. */ if (doingdirectory && newparent) { - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, sizeof(struct dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, tcnp->cn_cred, NOCRED, NULL, NULL); if (error == 0) { /* Like ufs little-endian: */ namlen = dirbuf.dotdot_type; if (namlen != 2 || dirbuf.dotdot_name[0] != '.' || dirbuf.dotdot_name[1] != '.') { ext2_dirbad(xp, (doff_t)12, "rename: mangled dir"); } else { dirbuf.dotdot_ino = newparent; (void)vn_rdwr(UIO_WRITE, fvp, (caddr_t)&dirbuf, sizeof(struct dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_SYNC | IO_NOMACCHECK, tcnp->cn_cred, NOCRED, NULL, NULL); cache_purge(fdvp); } } } error = ext2_dirremove(fdvp, fcnp); if (!error) { - xp->i_nlink--; + ext2_dec_nlink(xp); xp->i_flag |= IN_CHANGE; } xp->i_flag &= ~IN_RENAME; } if (dp) vput(fdvp); if (xp) vput(fvp); vrele(ap->a_fvp); return (error); bad: if (xp) vput(ITOV(xp)); vput(ITOV(dp)); out: if (doingdirectory) ip->i_flag &= ~IN_RENAME; if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { - ip->i_nlink--; + ext2_dec_nlink(ip); ip->i_flag |= IN_CHANGE; ip->i_flag &= ~IN_RENAME; vput(fvp); } else vrele(fvp); return (error); } #ifdef UFS_ACL static int ext2_do_posix1e_acl_inheritance_dir(struct vnode *dvp, struct vnode *tvp, mode_t dmode, struct ucred *cred, struct thread *td) { int error; struct inode *ip = VTOI(tvp); struct acl *dacl, *acl; acl = acl_alloc(M_WAITOK); dacl = acl_alloc(M_WAITOK); /* * Retrieve default ACL from parent, if any. */ error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td); switch (error) { case 0: /* * Retrieved a default ACL, so merge mode and ACL if * necessary. If the ACL is empty, fall through to * the "not defined or available" case. */ if (acl->acl_cnt != 0) { dmode = acl_posix1e_newfilemode(dmode, acl); ip->i_mode = dmode; *dacl = *acl; ext2_sync_acl_from_inode(ip, acl); break; } /* FALLTHROUGH */ case EOPNOTSUPP: /* * Just use the mode as-is. */ ip->i_mode = dmode; error = 0; goto out; default: goto out; } error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td); if (error == 0) error = VOP_SETACL(tvp, ACL_TYPE_DEFAULT, dacl, cred, td); switch (error) { case 0: break; case EOPNOTSUPP: /* * XXX: This should not happen, as EOPNOTSUPP above * was supposed to free acl. */ #ifdef DEBUG printf("ext2_mkdir: VOP_GETACL() but no VOP_SETACL()\n"); #endif /* DEBUG */ break; default: goto out; } out: acl_free(acl); acl_free(dacl); return (error); } static int ext2_do_posix1e_acl_inheritance_file(struct vnode *dvp, struct vnode *tvp, mode_t mode, struct ucred *cred, struct thread *td) { int error; struct inode *ip = VTOI(tvp); struct acl *acl; acl = acl_alloc(M_WAITOK); /* * Retrieve default ACL for parent, if any. */ error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td); switch (error) { case 0: /* * Retrieved a default ACL, so merge mode and ACL if * necessary. */ if (acl->acl_cnt != 0) { /* * Two possible ways for default ACL to not * be present. First, the EA can be * undefined, or second, the default ACL can * be blank. If it's blank, fall through to * the it's not defined case. */ mode = acl_posix1e_newfilemode(mode, acl); ip->i_mode = mode; ext2_sync_acl_from_inode(ip, acl); break; } /* FALLTHROUGH */ case EOPNOTSUPP: /* * Just use the mode as-is. */ ip->i_mode = mode; error = 0; goto out; default: goto out; } error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td); switch (error) { case 0: break; case EOPNOTSUPP: /* * XXX: This should not happen, as EOPNOTSUPP above was * supposed to free acl. */ printf("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() " "but no VOP_SETACL()\n"); /* panic("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() " "but no VOP_SETACL()"); */ break; default: goto out; } out: acl_free(acl); return (error); } #endif /* UFS_ACL */ /* * Mkdir system call */ static int ext2_mkdir(struct vop_mkdir_args *ap) { struct vnode *dvp = ap->a_dvp; struct vattr *vap = ap->a_vap; struct componentname *cnp = ap->a_cnp; struct inode *ip, *dp; struct vnode *tvp; struct dirtemplate dirtemplate, *dtp; int error, dmode; #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("ext2_mkdir: no name"); #endif dp = VTOI(dvp); - if ((nlink_t)dp->i_nlink >= EXT2_LINK_MAX) { + if ((nlink_t)dp->i_nlink >= ext2_max_nlink(dp) && + !ext2_htree_has_idx(dp)) { error = EMLINK; goto out; } dmode = vap->va_mode & 0777; dmode |= IFDIR; /* * Must simulate part of ext2_makeinode here to acquire the inode, * but not have it entered in the parent directory. The entry is * made later after writing "." and ".." entries. */ error = ext2_valloc(dvp, dmode, cnp->cn_cred, &tvp); if (error) goto out; ip = VTOI(tvp); ip->i_gid = dp->i_gid; #ifdef SUIDDIR { /* * if we are hacking owners here, (only do this where told to) * and we are not giving it TOO root, (would subvert quotas) * then go ahead and give it to the other user. * The new directory also inherits the SUID bit. * If user's UID and dir UID are the same, * 'give it away' so that the SUID is still forced on. */ if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && (dp->i_mode & ISUID) && dp->i_uid) { dmode |= ISUID; ip->i_uid = dp->i_uid; } else { ip->i_uid = cnp->cn_cred->cr_uid; } } #else ip->i_uid = cnp->cn_cred->cr_uid; #endif ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; ip->i_mode = dmode; tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ ip->i_nlink = 2; if (cnp->cn_flags & ISWHITEOUT) ip->i_flags |= UF_OPAQUE; error = ext2_update(tvp, 1); /* * Bump link count in parent directory * to reflect work done below. Should * be done before reference is created * so reparation is possible if we crash. */ - dp->i_nlink++; + ext2_inc_nlink(dp); dp->i_flag |= IN_CHANGE; error = ext2_update(dvp, !DOINGASYNC(dvp)); if (error) goto bad; /* Initialize directory with "." and ".." from static template. */ if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs, EXT2F_INCOMPAT_FTYPE)) dtp = &mastertemplate; else dtp = &omastertemplate; dirtemplate = *dtp; dirtemplate.dot_ino = ip->i_number; dirtemplate.dotdot_ino = dp->i_number; /* * note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE so let's * just redefine it - for this function only */ #undef DIRBLKSIZ #define DIRBLKSIZ VTOI(dvp)->i_e2fs->e2fs_bsize dirtemplate.dotdot_reclen = DIRBLKSIZ - 12; error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, sizeof(dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_SYNC | IO_NOMACCHECK, cnp->cn_cred, NOCRED, NULL, NULL); if (error) { - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; goto bad; } if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) /* XXX should grow with balloc() */ panic("ext2_mkdir: blksize"); else { ip->i_size = DIRBLKSIZ; ip->i_flag |= IN_CHANGE; } #ifdef UFS_ACL if (dvp->v_mount->mnt_flag & MNT_ACLS) { error = ext2_do_posix1e_acl_inheritance_dir(dvp, tvp, dmode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } #endif /* UFS_ACL */ /* Directory set up, now install its entry in the parent directory. */ error = ext2_direnter(ip, dvp, cnp); if (error) { - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; } bad: /* * No need to do an explicit VOP_TRUNCATE here, vrele will do this * for us because we set the link count to 0. */ if (error) { ip->i_nlink = 0; ip->i_flag |= IN_CHANGE; vput(tvp); } else *ap->a_vpp = tvp; out: return (error); #undef DIRBLKSIZ #define DIRBLKSIZ DEV_BSIZE } /* * Rmdir system call. */ static int ext2_rmdir(struct vop_rmdir_args *ap) { struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct inode *ip, *dp; int error; ip = VTOI(vp); dp = VTOI(dvp); /* * Verify the directory is empty (and valid). * (Rmdir ".." won't be valid since * ".." will contain a reference to * the current directory and thus be * non-empty.) */ - if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) { + if (!ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) { error = ENOTEMPTY; goto out; } if ((dp->i_flags & APPEND) || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) { error = EPERM; goto out; } /* * Delete reference to directory before purging * inode. If we crash in between, the directory * will be reattached to lost+found, */ error = ext2_dirremove(dvp, cnp); if (error) goto out; - dp->i_nlink--; + ext2_dec_nlink(dp); dp->i_flag |= IN_CHANGE; cache_purge(dvp); VOP_UNLOCK(dvp, 0); /* * Truncate inode. The only stuff left - * in the directory is "." and "..". The - * "." reference is inconsequential since - * we're quashing it. The ".." reference - * has already been adjusted above. We've - * removed the "." reference and the reference - * in the parent directory, but there may be - * other hard links so decrement by 2 and - * worry about them later. + * in the directory is "." and "..". */ - ip->i_nlink -= 2; + ip->i_nlink = 0; error = ext2_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred, cnp->cn_thread); cache_purge(ITOV(ip)); if (vn_lock(dvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { VOP_UNLOCK(vp, 0); vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } out: return (error); } /* * symlink -- make a symbolic link */ static int ext2_symlink(struct vop_symlink_args *ap) { struct vnode *vp, **vpp = ap->a_vpp; struct inode *ip; int len, error; error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, vpp, ap->a_cnp); if (error) return (error); vp = *vpp; len = strlen(ap->a_target); if (len < vp->v_mount->mnt_maxsymlinklen) { ip = VTOI(vp); bcopy(ap->a_target, (char *)ip->i_shortlink, len); ip->i_size = len; ip->i_flag |= IN_CHANGE | IN_UPDATE; } else error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, ap->a_cnp->cn_cred, NOCRED, NULL, NULL); if (error) vput(vp); return (error); } /* * Return target name of a symbolic link */ static int ext2_readlink(struct vop_readlink_args *ap) { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); int isize; isize = ip->i_size; if (isize < vp->v_mount->mnt_maxsymlinklen) { uiomove((char *)ip->i_shortlink, isize, ap->a_uio); return (0); } return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); } /* * Calculate the logical to physical mapping if not done already, * then call the device strategy routine. * * In order to be able to swap to a file, the ext2_bmaparray() operation may not * deadlock on memory. See ext2_bmap() for details. */ static int ext2_strategy(struct vop_strategy_args *ap) { struct buf *bp = ap->a_bp; struct vnode *vp = ap->a_vp; struct bufobj *bo; daddr_t blkno; int error; if (vp->v_type == VBLK || vp->v_type == VCHR) panic("ext2_strategy: spec"); if (bp->b_blkno == bp->b_lblkno) { error = ext2_bmaparray(vp, bp->b_lblkno, &blkno, NULL, NULL); bp->b_blkno = blkno; if (error) { bp->b_error = error; bp->b_ioflags |= BIO_ERROR; bufdone(bp); return (0); } if ((long)bp->b_blkno == -1) vfs_bio_clrbuf(bp); } if ((long)bp->b_blkno == -1) { bufdone(bp); return (0); } bp->b_iooffset = dbtob(bp->b_blkno); bo = VFSTOEXT2(vp->v_mount)->um_bo; BO_STRATEGY(bo, bp); return (0); } /* * Print out the contents of an inode. */ static int ext2_print(struct vop_print_args *ap) { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); vn_printf(ip->i_devvp, "\tino %ju", (uintmax_t)ip->i_number); if (vp->v_type == VFIFO) fifo_printinfo(vp); printf("\n"); return (0); } /* * Close wrapper for fifos. * * Update the times on the inode then do device close. */ static int ext2fifo_close(struct vop_close_args *ap) { struct vnode *vp = ap->a_vp; VI_LOCK(vp); if (vp->v_usecount > 1) ext2_itimes_locked(vp); VI_UNLOCK(vp); return (fifo_specops.vop_close(ap)); } /* * Kqfilter wrapper for fifos. * * Fall through to ext2 kqfilter routines if needed */ static int ext2fifo_kqfilter(struct vop_kqfilter_args *ap) { int error; error = fifo_specops.vop_kqfilter(ap); if (error) error = vfs_kqfilter(ap); return (error); } /* * Return POSIX pathconf information applicable to ext2 filesystems. */ static int ext2_pathconf(struct vop_pathconf_args *ap) { int error = 0; switch (ap->a_name) { case _PC_LINK_MAX: - *ap->a_retval = EXT2_LINK_MAX; + if (ext2_htree_has_idx(VTOI(ap->a_vp))) + *ap->a_retval = INT_MAX; + else + *ap->a_retval = ext2_max_nlink(VTOI(ap->a_vp)); break; case _PC_NAME_MAX: *ap->a_retval = NAME_MAX; break; case _PC_PATH_MAX: *ap->a_retval = PATH_MAX; break; case _PC_PIPE_BUF: *ap->a_retval = PIPE_BUF; break; case _PC_CHOWN_RESTRICTED: *ap->a_retval = 1; break; case _PC_NO_TRUNC: *ap->a_retval = 1; break; #ifdef UFS_ACL case _PC_ACL_EXTENDED: if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS) *ap->a_retval = 1; else *ap->a_retval = 0; break; case _PC_ACL_PATH_MAX: if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS) *ap->a_retval = ACL_MAX_ENTRIES; else *ap->a_retval = 3; break; #endif /* UFS_ACL */ case _PC_MIN_HOLE_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_ASYNC_IO: /* _PC_ASYNC_IO should have been handled by upper layers. */ KASSERT(0, ("_PC_ASYNC_IO should not get here")); error = EINVAL; break; case _PC_PRIO_IO: *ap->a_retval = 0; break; case _PC_SYNC_IO: *ap->a_retval = 0; break; case _PC_ALLOC_SIZE_MIN: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize; break; case _PC_FILESIZEBITS: *ap->a_retval = 64; break; case _PC_REC_INCR_XFER_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_REC_MAX_XFER_SIZE: *ap->a_retval = -1; /* means ``unlimited'' */ break; case _PC_REC_MIN_XFER_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_REC_XFER_ALIGN: *ap->a_retval = PAGE_SIZE; break; case _PC_SYMLINK_MAX: *ap->a_retval = MAXPATHLEN; break; default: error = EINVAL; break; } return (error); } /* * Vnode operation to remove a named attribute. */ static int ext2_deleteextattr(struct vop_deleteextattr_args *ap) { struct inode *ip; struct m_ext2fs *fs; int error; ip = VTOI(ap->a_vp); fs = ip->i_e2fs; if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR)) return (EOPNOTSUPP); if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VWRITE); if (error) return (error); error = ENOATTR; if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) { error = ext2_extattr_inode_delete(ip, ap->a_attrnamespace, ap->a_name); if (error != ENOATTR) return (error); } if (ip->i_facl) error = ext2_extattr_block_delete(ip, ap->a_attrnamespace, ap->a_name); return (error); } /* * Vnode operation to retrieve a named extended attribute. */ static int ext2_getextattr(struct vop_getextattr_args *ap) { struct inode *ip; struct m_ext2fs *fs; int error; ip = VTOI(ap->a_vp); fs = ip->i_e2fs; if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR)) return (EOPNOTSUPP); if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VREAD); if (error) return (error); if (ap->a_size != NULL) *ap->a_size = 0; error = ENOATTR; if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) { error = ext2_extattr_inode_get(ip, ap->a_attrnamespace, ap->a_name, ap->a_uio, ap->a_size); if (error != ENOATTR) return (error); } if (ip->i_facl) error = ext2_extattr_block_get(ip, ap->a_attrnamespace, ap->a_name, ap->a_uio, ap->a_size); return (error); } /* * Vnode operation to retrieve extended attributes on a vnode. */ static int ext2_listextattr(struct vop_listextattr_args *ap) { struct inode *ip; struct m_ext2fs *fs; int error; ip = VTOI(ap->a_vp); fs = ip->i_e2fs; if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR)) return (EOPNOTSUPP); if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VREAD); if (error) return (error); if (ap->a_size != NULL) *ap->a_size = 0; if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) { error = ext2_extattr_inode_list(ip, ap->a_attrnamespace, ap->a_uio, ap->a_size); if (error) return (error); } if (ip->i_facl) error = ext2_extattr_block_list(ip, ap->a_attrnamespace, ap->a_uio, ap->a_size); return (error); } /* * Vnode operation to set a named attribute. */ static int ext2_setextattr(struct vop_setextattr_args *ap) { struct inode *ip; struct m_ext2fs *fs; int error; ip = VTOI(ap->a_vp); fs = ip->i_e2fs; if (!EXT2_HAS_COMPAT_FEATURE(ip->i_e2fs, EXT2F_COMPAT_EXT_ATTR)) return (EOPNOTSUPP); if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VWRITE); if (error) return (error); error = ext2_extattr_valid_attrname(ap->a_attrnamespace, ap->a_name); if (error) return (error); if (EXT2_INODE_SIZE(fs) != E2FS_REV0_INODE_SIZE) { error = ext2_extattr_inode_set(ip, ap->a_attrnamespace, ap->a_name, ap->a_uio); if (error != ENOSPC) return (error); } error = ext2_extattr_block_set(ip, ap->a_attrnamespace, ap->a_name, ap->a_uio); return (error); } /* * Vnode pointer to File handle */ /* ARGSUSED */ static int ext2_vptofh(struct vop_vptofh_args *ap) { struct inode *ip; struct ufid *ufhp; ip = VTOI(ap->a_vp); ufhp = (struct ufid *)ap->a_fhp; ufhp->ufid_len = sizeof(struct ufid); ufhp->ufid_ino = ip->i_number; ufhp->ufid_gen = ip->i_gen; return (0); } /* * Initialize the vnode associated with a new inode, handle aliased * vnodes. */ int ext2_vinit(struct mount *mntp, struct vop_vector *fifoops, struct vnode **vpp) { struct inode *ip; struct vnode *vp; vp = *vpp; ip = VTOI(vp); vp->v_type = IFTOVT(ip->i_mode); if (vp->v_type == VFIFO) vp->v_op = fifoops; if (ip->i_number == EXT2_ROOTINO) vp->v_vflag |= VV_ROOT; ip->i_modrev = init_va_filerev(); *vpp = vp; return (0); } /* * Allocate a new inode. */ static int ext2_makeinode(int mode, struct vnode *dvp, struct vnode **vpp, struct componentname *cnp) { struct inode *ip, *pdir; struct vnode *tvp; int error; pdir = VTOI(dvp); #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("ext2_makeinode: no name"); #endif *vpp = NULL; if ((mode & IFMT) == 0) mode |= IFREG; error = ext2_valloc(dvp, mode, cnp->cn_cred, &tvp); if (error) { return (error); } ip = VTOI(tvp); ip->i_gid = pdir->i_gid; #ifdef SUIDDIR { /* * if we are * not the owner of the directory, * and we are hacking owners here, (only do this where told to) * and we are not giving it TOO root, (would subvert quotas) * then go ahead and give it to the other user. * Note that this drops off the execute bits for security. */ if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && (pdir->i_mode & ISUID) && (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) { ip->i_uid = pdir->i_uid; mode &= ~07111; } else { ip->i_uid = cnp->cn_cred->cr_uid; } } #else ip->i_uid = cnp->cn_cred->cr_uid; #endif ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; ip->i_mode = mode; tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ ip->i_nlink = 1; if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred)) { if (priv_check_cred(cnp->cn_cred, PRIV_VFS_RETAINSUGID, 0)) ip->i_mode &= ~ISGID; } if (cnp->cn_flags & ISWHITEOUT) ip->i_flags |= UF_OPAQUE; /* * Make sure inode goes to disk before directory entry. */ error = ext2_update(tvp, !DOINGASYNC(tvp)); if (error) goto bad; #ifdef UFS_ACL if (dvp->v_mount->mnt_flag & MNT_ACLS) { error = ext2_do_posix1e_acl_inheritance_file(dvp, tvp, mode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } #endif /* UFS_ACL */ error = ext2_direnter(ip, dvp, cnp); if (error) goto bad; *vpp = tvp; return (0); bad: /* * Write error occurred trying to update the inode * or the directory so must deallocate the inode. */ ip->i_nlink = 0; ip->i_flag |= IN_CHANGE; vput(tvp); return (error); } /* * Vnode op for reading. */ static int ext2_read(struct vop_read_args *ap) { struct vnode *vp; struct inode *ip; int error; vp = ap->a_vp; ip = VTOI(vp); /* EXT4_EXT_LOCK(ip); */ if (ip->i_flag & IN_E4EXTENTS) error = ext4_ext_read(ap); else error = ext2_ind_read(ap); /* EXT4_EXT_UNLOCK(ip); */ return (error); } /* * Vnode op for reading. */ static int ext2_ind_read(struct vop_read_args *ap) { struct vnode *vp; struct inode *ip; struct uio *uio; struct m_ext2fs *fs; struct buf *bp; daddr_t lbn, nextlbn; off_t bytesinfile; long size, xfersize, blkoffset; int error, orig_resid, seqcount; int ioflag; vp = ap->a_vp; uio = ap->a_uio; ioflag = ap->a_ioflag; seqcount = ap->a_ioflag >> IO_SEQSHIFT; ip = VTOI(vp); #ifdef INVARIANTS if (uio->uio_rw != UIO_READ) panic("%s: mode", "ext2_read"); if (vp->v_type == VLNK) { if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen) panic("%s: short symlink", "ext2_read"); } else if (vp->v_type != VREG && vp->v_type != VDIR) panic("%s: type %d", "ext2_read", vp->v_type); #endif orig_resid = uio->uio_resid; KASSERT(orig_resid >= 0, ("ext2_read: uio->uio_resid < 0")); if (orig_resid == 0) return (0); KASSERT(uio->uio_offset >= 0, ("ext2_read: uio->uio_offset < 0")); fs = ip->i_e2fs; if (uio->uio_offset < ip->i_size && uio->uio_offset >= fs->e2fs_maxfilesize) return (EOVERFLOW); for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0) break; lbn = lblkno(fs, uio->uio_offset); nextlbn = lbn + 1; size = blksize(fs, ip, lbn); blkoffset = blkoff(fs, uio->uio_offset); xfersize = fs->e2fs_fsize - blkoffset; if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; if (bytesinfile < xfersize) xfersize = bytesinfile; if (lblktosize(fs, nextlbn) >= ip->i_size) error = bread(vp, lbn, size, NOCRED, &bp); else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { error = cluster_read(vp, ip->i_size, lbn, size, NOCRED, blkoffset + uio->uio_resid, seqcount, 0, &bp); } else if (seqcount > 1) { u_int nextsize = blksize(fs, ip, nextlbn); error = breadn(vp, lbn, size, &nextlbn, &nextsize, 1, NOCRED, &bp); } else error = bread(vp, lbn, size, NOCRED, &bp); if (error) { brelse(bp); bp = NULL; break; } /* * We should only get non-zero b_resid when an I/O error * has occurred, which should cause us to break above. * However, if the short read did not cause an error, * then we want to ensure that we do not uiomove bad * or uninitialized data. */ size -= bp->b_resid; if (size < xfersize) { if (size == 0) break; xfersize = size; } error = uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); if (error) break; vfs_bio_brelse(bp, ioflag); } /* * This can only happen in the case of an error because the loop * above resets bp to NULL on each iteration and on normal * completion has not set a new value into it. so it must have come * from a 'break' statement */ if (bp != NULL) vfs_bio_brelse(bp, ioflag); if ((error == 0 || uio->uio_resid != orig_resid) && (vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0) ip->i_flag |= IN_ACCESS; return (error); } static int ext2_ioctl(struct vop_ioctl_args *ap) { switch (ap->a_command) { case FIOSEEKDATA: case FIOSEEKHOLE: return (vn_bmap_seekhole(ap->a_vp, ap->a_command, (off_t *)ap->a_data, ap->a_cred)); default: return (ENOTTY); } } /* * this function handles ext4 extents block mapping */ static int ext4_ext_read(struct vop_read_args *ap) { static unsigned char zeroes[EXT2_MAX_BLOCK_SIZE]; struct vnode *vp; struct inode *ip; struct uio *uio; struct m_ext2fs *fs; struct buf *bp; struct ext4_extent nex, *ep; struct ext4_extent_path path; daddr_t lbn, newblk; off_t bytesinfile; int cache_type; ssize_t orig_resid; int error; long size, xfersize, blkoffset; vp = ap->a_vp; ip = VTOI(vp); uio = ap->a_uio; memset(&path, 0, sizeof(path)); orig_resid = uio->uio_resid; KASSERT(orig_resid >= 0, ("%s: uio->uio_resid < 0", __func__)); if (orig_resid == 0) return (0); KASSERT(uio->uio_offset >= 0, ("%s: uio->uio_offset < 0", __func__)); fs = ip->i_e2fs; if (uio->uio_offset < ip->i_size && uio->uio_offset >= fs->e2fs_maxfilesize) return (EOVERFLOW); while (uio->uio_resid > 0) { if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0) break; lbn = lblkno(fs, uio->uio_offset); size = blksize(fs, ip, lbn); blkoffset = blkoff(fs, uio->uio_offset); xfersize = fs->e2fs_fsize - blkoffset; xfersize = MIN(xfersize, uio->uio_resid); xfersize = MIN(xfersize, bytesinfile); /* get block from ext4 extent cache */ cache_type = ext4_ext_in_cache(ip, lbn, &nex); switch (cache_type) { case EXT4_EXT_CACHE_NO: ext4_ext_find_extent(fs, ip, lbn, &path); if (path.ep_is_sparse) ep = &path.ep_sparse_ext; else ep = path.ep_ext; if (ep == NULL) return (EIO); ext4_ext_put_cache(ip, ep, path.ep_is_sparse ? EXT4_EXT_CACHE_GAP : EXT4_EXT_CACHE_IN); newblk = lbn - ep->e_blk + (ep->e_start_lo | (daddr_t)ep->e_start_hi << 32); if (path.ep_bp != NULL) { brelse(path.ep_bp); path.ep_bp = NULL; } break; case EXT4_EXT_CACHE_GAP: /* block has not been allocated yet */ break; case EXT4_EXT_CACHE_IN: newblk = lbn - nex.e_blk + (nex.e_start_lo | (daddr_t)nex.e_start_hi << 32); break; default: panic("%s: invalid cache type", __func__); } if (cache_type == EXT4_EXT_CACHE_GAP || (cache_type == EXT4_EXT_CACHE_NO && path.ep_is_sparse)) { if (xfersize > sizeof(zeroes)) xfersize = sizeof(zeroes); error = uiomove(zeroes, xfersize, uio); if (error) return (error); } else { error = bread(ip->i_devvp, fsbtodb(fs, newblk), size, NOCRED, &bp); if (error) { brelse(bp); return (error); } size -= bp->b_resid; if (size < xfersize) { if (size == 0) { bqrelse(bp); break; } xfersize = size; } error = uiomove(bp->b_data + blkoffset, xfersize, uio); bqrelse(bp); if (error) return (error); } } return (0); } /* * Vnode op for writing. */ static int ext2_write(struct vop_write_args *ap) { struct vnode *vp; struct uio *uio; struct inode *ip; struct m_ext2fs *fs; struct buf *bp; daddr_t lbn; off_t osize; int blkoffset, error, flags, ioflag, resid, size, seqcount, xfersize; ioflag = ap->a_ioflag; uio = ap->a_uio; vp = ap->a_vp; seqcount = ioflag >> IO_SEQSHIFT; ip = VTOI(vp); #ifdef INVARIANTS if (uio->uio_rw != UIO_WRITE) panic("%s: mode", "ext2_write"); #endif switch (vp->v_type) { case VREG: if (ioflag & IO_APPEND) uio->uio_offset = ip->i_size; if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size) return (EPERM); /* FALLTHROUGH */ case VLNK: break; case VDIR: /* XXX differs from ffs -- this is called from ext2_mkdir(). */ if ((ioflag & IO_SYNC) == 0) panic("ext2_write: nonsync dir write"); break; default: panic("ext2_write: type %p %d (%jd,%jd)", (void *)vp, vp->v_type, (intmax_t)uio->uio_offset, (intmax_t)uio->uio_resid); } KASSERT(uio->uio_resid >= 0, ("ext2_write: uio->uio_resid < 0")); KASSERT(uio->uio_offset >= 0, ("ext2_write: uio->uio_offset < 0")); fs = ip->i_e2fs; if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->e2fs_maxfilesize) return (EFBIG); /* * Maybe this should be above the vnode op call, but so long as * file servers have no limits, I don't think it matters. */ if (vn_rlimit_fsize(vp, uio, uio->uio_td)) return (EFBIG); resid = uio->uio_resid; osize = ip->i_size; if (seqcount > BA_SEQMAX) flags = BA_SEQMAX << BA_SEQSHIFT; else flags = seqcount << BA_SEQSHIFT; if ((ioflag & IO_SYNC) && !DOINGASYNC(vp)) flags |= IO_SYNC; for (error = 0; uio->uio_resid > 0;) { lbn = lblkno(fs, uio->uio_offset); blkoffset = blkoff(fs, uio->uio_offset); xfersize = fs->e2fs_fsize - blkoffset; if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; if (uio->uio_offset + xfersize > ip->i_size) vnode_pager_setsize(vp, uio->uio_offset + xfersize); /* * We must perform a read-before-write if the transfer size * does not cover the entire buffer. */ if (fs->e2fs_bsize > xfersize) flags |= BA_CLRBUF; else flags &= ~BA_CLRBUF; error = ext2_balloc(ip, lbn, blkoffset + xfersize, ap->a_cred, &bp, flags); if (error != 0) break; if ((ioflag & (IO_SYNC | IO_INVAL)) == (IO_SYNC | IO_INVAL)) bp->b_flags |= B_NOCACHE; if (uio->uio_offset + xfersize > ip->i_size) ip->i_size = uio->uio_offset + xfersize; size = blksize(fs, ip, lbn) - bp->b_resid; if (size < xfersize) xfersize = size; error = uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); /* * If the buffer is not already filled and we encounter an * error while trying to fill it, we have to clear out any * garbage data from the pages instantiated for the buffer. * If we do not, a failed uiomove() during a write can leave * the prior contents of the pages exposed to a userland mmap. * * Note that we need only clear buffers with a transfer size * equal to the block size because buffers with a shorter * transfer size were cleared above by the call to ext2_balloc() * with the BA_CLRBUF flag set. * * If the source region for uiomove identically mmaps the * buffer, uiomove() performed the NOP copy, and the buffer * content remains valid because the page fault handler * validated the pages. */ if (error != 0 && (bp->b_flags & B_CACHE) == 0 && fs->e2fs_bsize == xfersize) vfs_bio_clrbuf(bp); vfs_bio_set_flags(bp, ioflag); /* * If IO_SYNC each buffer is written synchronously. Otherwise * if we have a severe page deficiency write the buffer * asynchronously. Otherwise try to cluster, and if that * doesn't do it then either do an async write (if O_DIRECT), * or a delayed write (if not). */ if (ioflag & IO_SYNC) { (void)bwrite(bp); } else if (vm_page_count_severe() || buf_dirty_count_severe() || (ioflag & IO_ASYNC)) { bp->b_flags |= B_CLUSTEROK; bawrite(bp); } else if (xfersize + blkoffset == fs->e2fs_fsize) { if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) { bp->b_flags |= B_CLUSTEROK; cluster_write(vp, bp, ip->i_size, seqcount, 0); } else { bawrite(bp); } } else if (ioflag & IO_DIRECT) { bp->b_flags |= B_CLUSTEROK; bawrite(bp); } else { bp->b_flags |= B_CLUSTEROK; bdwrite(bp); } if (error || xfersize == 0) break; } /* * If we successfully wrote any data, and we are not the superuser * we clear the setuid and setgid bits as a precaution against * tampering. */ if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && ap->a_cred) { if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID, 0)) ip->i_mode &= ~(ISUID | ISGID); } if (error) { if (ioflag & IO_UNIT) { (void)ext2_truncate(vp, osize, ioflag & IO_SYNC, ap->a_cred, uio->uio_td); uio->uio_offset -= resid - uio->uio_resid; uio->uio_resid = resid; } } if (uio->uio_resid != resid) { ip->i_flag |= IN_CHANGE | IN_UPDATE; if (ioflag & IO_SYNC) error = ext2_update(vp, 1); } return (error); } Index: head/sys/fs/ext2fs/ext2fs.h =================================================================== --- head/sys/fs/ext2fs/ext2fs.h (revision 320210) +++ head/sys/fs/ext2fs/ext2fs.h (revision 320211) @@ -1,349 +1,350 @@ /*- * modified for EXT2FS support in Lites 1.1 * * Aug 1995, Godmar Back (gback@cs.utah.edu) * University of Utah, Department of Computer Science * * $FreeBSD$ */ /*- * Copyright (c) 2009 Aditya Sarawgi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE 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. * * */ #ifndef _FS_EXT2FS_EXT2FS_H_ #define _FS_EXT2FS_EXT2FS_H_ #include /* * Super block for an ext2fs file system. */ struct ext2fs { uint32_t e2fs_icount; /* Inode count */ uint32_t e2fs_bcount; /* blocks count */ uint32_t e2fs_rbcount; /* reserved blocks count */ uint32_t e2fs_fbcount; /* free blocks count */ uint32_t e2fs_ficount; /* free inodes count */ uint32_t e2fs_first_dblock; /* first data block */ uint32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */ uint32_t e2fs_log_fsize; /* fragment size */ uint32_t e2fs_bpg; /* blocks per group */ uint32_t e2fs_fpg; /* frags per group */ uint32_t e2fs_ipg; /* inodes per group */ uint32_t e2fs_mtime; /* mount time */ uint32_t e2fs_wtime; /* write time */ uint16_t e2fs_mnt_count; /* mount count */ uint16_t e2fs_max_mnt_count; /* max mount count */ uint16_t e2fs_magic; /* magic number */ uint16_t e2fs_state; /* file system state */ uint16_t e2fs_beh; /* behavior on errors */ uint16_t e2fs_minrev; /* minor revision level */ uint32_t e2fs_lastfsck; /* time of last fsck */ uint32_t e2fs_fsckintv; /* max time between fscks */ uint32_t e2fs_creator; /* creator OS */ uint32_t e2fs_rev; /* revision level */ uint16_t e2fs_ruid; /* default uid for reserved blocks */ uint16_t e2fs_rgid; /* default gid for reserved blocks */ /* EXT2_DYNAMIC_REV superblocks */ uint32_t e2fs_first_ino; /* first non-reserved inode */ uint16_t e2fs_inode_size; /* size of inode structure */ uint16_t e2fs_block_group_nr; /* block grp number of this sblk*/ uint32_t e2fs_features_compat; /* compatible feature set */ uint32_t e2fs_features_incompat; /* incompatible feature set */ uint32_t e2fs_features_rocompat; /* RO-compatible feature set */ uint8_t e2fs_uuid[16]; /* 128-bit uuid for volume */ char e2fs_vname[16]; /* volume name */ char e2fs_fsmnt[64]; /* name mounted on */ uint32_t e2fs_algo; /* For compression */ uint8_t e2fs_prealloc; /* # of blocks for old prealloc */ uint8_t e2fs_dir_prealloc; /* # of blocks for old prealloc dirs */ uint16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */ char e3fs_journal_uuid[16]; /* uuid of journal superblock */ uint32_t e3fs_journal_inum; /* inode number of journal file */ uint32_t e3fs_journal_dev; /* device number of journal file */ uint32_t e3fs_last_orphan; /* start of list of inodes to delete */ uint32_t e3fs_hash_seed[4]; /* HTREE hash seed */ char e3fs_def_hash_version;/* Default hash version to use */ char e3fs_jnl_backup_type; uint16_t e3fs_desc_size; /* size of group descriptor */ uint32_t e3fs_default_mount_opts; uint32_t e3fs_first_meta_bg; /* First metablock block group */ uint32_t e3fs_mkfs_time; /* when the fs was created */ uint32_t e3fs_jnl_blks[17]; /* backup of the journal inode */ uint32_t e4fs_bcount_hi; /* high bits of blocks count */ uint32_t e4fs_rbcount_hi; /* high bits of reserved blocks count */ uint32_t e4fs_fbcount_hi; /* high bits of free blocks count */ uint16_t e4fs_min_extra_isize; /* all inodes have some bytes */ uint16_t e4fs_want_extra_isize;/* inodes must reserve some bytes */ uint32_t e4fs_flags; /* miscellaneous flags */ uint16_t e4fs_raid_stride; /* RAID stride */ uint16_t e4fs_mmpintv; /* seconds to wait in MMP checking */ uint64_t e4fs_mmpblk; /* block for multi-mount protection */ uint32_t e4fs_raid_stripe_wid; /* blocks on data disks (N * stride) */ uint8_t e4fs_log_gpf; /* FLEX_BG group size */ uint8_t e4fs_chksum_type; /* metadata checksum algorithm used */ uint8_t e4fs_encrypt; /* versioning level for encryption */ uint8_t e4fs_reserved_pad; uint64_t e4fs_kbytes_written; /* number of lifetime kilobytes */ uint32_t e4fs_snapinum; /* inode number of active snapshot */ uint32_t e4fs_snapid; /* sequential ID of active snapshot */ uint64_t e4fs_snaprbcount; /* reserved blocks for active snapshot */ uint32_t e4fs_snaplist; /* inode number for on-disk snapshot */ uint32_t e4fs_errcount; /* number of file system errors */ uint32_t e4fs_first_errtime; /* first time an error happened */ uint32_t e4fs_first_errino; /* inode involved in first error */ uint64_t e4fs_first_errblk; /* block involved of first error */ uint8_t e4fs_first_errfunc[32];/* function where error happened */ uint32_t e4fs_first_errline; /* line number where error happened */ uint32_t e4fs_last_errtime; /* most recent time of an error */ uint32_t e4fs_last_errino; /* inode involved in last error */ uint32_t e4fs_last_errline; /* line number where error happened */ uint64_t e4fs_last_errblk; /* block involved of last error */ uint8_t e4fs_last_errfunc[32]; /* function where error happened */ uint8_t e4fs_mount_opts[64]; uint32_t e4fs_usrquota_inum; /* inode for tracking user quota */ uint32_t e4fs_grpquota_inum; /* inode for tracking group quota */ uint32_t e4fs_overhead_clusters;/* overhead blocks/clusters */ uint32_t e4fs_backup_bgs[2]; /* groups with sparse_super2 SBs */ uint8_t e4fs_encrypt_algos[4];/* encryption algorithms in use */ uint8_t e4fs_encrypt_pw_salt[16];/* salt used for string2key */ uint32_t e4fs_lpf_ino; /* location of the lost+found inode */ uint32_t e4fs_proj_quota_inum; /* inode for tracking project quota */ uint32_t e4fs_chksum_seed; /* checksum seed */ uint32_t e4fs_reserved[98]; /* padding to the end of the block */ uint32_t e4fs_sbchksum; /* superblock checksum */ }; /* * The path name on which the file system is mounted is maintained * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in * the super block for this name. */ #define MAXMNTLEN 512 /* * In-Memory Superblock */ struct m_ext2fs { struct ext2fs * e2fs; char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */ char e2fs_ronly; /* mounted read-only flag */ char e2fs_fmod; /* super block modified flag */ uint32_t e2fs_bsize; /* Block size */ uint32_t e2fs_bshift; /* calc of logical block no */ uint32_t e2fs_bpg; /* Number of blocks per group */ int64_t e2fs_qbmask; /* = s_blocksize -1 */ uint32_t e2fs_fsbtodb; /* Shift to get disk block */ uint32_t e2fs_ipg; /* Number of inodes per group */ uint32_t e2fs_ipb; /* Number of inodes per block */ uint32_t e2fs_itpg; /* Number of inode table per group */ uint32_t e2fs_fsize; /* Size of fragments per block */ uint32_t e2fs_fpb; /* Number of fragments per block */ uint32_t e2fs_fpg; /* Number of fragments per group */ uint32_t e2fs_gdbcount; /* Number of group descriptors */ uint32_t e2fs_gcount; /* Number of groups */ uint32_t e2fs_isize; /* Size of inode */ uint32_t e2fs_total_dir; /* Total number of directories */ uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */ char e2fs_wasvalid; /* valid at mount time */ off_t e2fs_maxfilesize; struct ext2_gd *e2fs_gd; /* Group Descriptors */ int32_t e2fs_contigsumsize; /* size of cluster summary array */ int32_t *e2fs_maxcluster; /* max cluster in each cyl group */ struct csum *e2fs_clustersum; /* cluster summary in each cyl group */ int32_t e2fs_uhash; /* 3 if hash should be signed, 0 if not */ }; /* cluster summary information */ struct csum { int8_t cs_init; /* cluster summary has been initialized */ int32_t *cs_sum; /* cluster summary array */ }; /* * The second extended file system magic number */ #define E2FS_MAGIC 0xEF53 /* * Revision levels */ #define E2FS_REV0 0 /* The good old (original) format */ #define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */ #define E2FS_REV0_INODE_SIZE 128 /* * compatible/incompatible features */ #define EXT2F_COMPAT_PREALLOC 0x0001 #define EXT2F_COMPAT_HASJOURNAL 0x0004 #define EXT2F_COMPAT_EXT_ATTR 0x0008 #define EXT2F_COMPAT_RESIZE 0x0010 #define EXT2F_COMPAT_DIRHASHINDEX 0x0020 #define EXT2F_COMPAT_SPARSESUPER2 0x0200 #define EXT2F_ROCOMPAT_SPARSESUPER 0x0001 #define EXT2F_ROCOMPAT_LARGEFILE 0x0002 #define EXT2F_ROCOMPAT_BTREE_DIR 0x0004 #define EXT2F_ROCOMPAT_HUGE_FILE 0x0008 #define EXT2F_ROCOMPAT_GDT_CSUM 0x0010 #define EXT2F_ROCOMPAT_DIR_NLINK 0x0020 #define EXT2F_ROCOMPAT_EXTRA_ISIZE 0x0040 #define EXT2F_ROCOMPAT_QUOTA 0x0100 #define EXT2F_ROCOMPAT_BIGALLOC 0x0200 #define EXT2F_ROCOMPAT_METADATA_CKSUM 0x0400 #define EXT2F_ROCOMPAT_READONLY 0x1000 #define EXT2F_ROCOMPAT_PROJECT 0x2000 #define EXT2F_INCOMPAT_COMP 0x0001 #define EXT2F_INCOMPAT_FTYPE 0x0002 #define EXT2F_INCOMPAT_RECOVER 0x0004 #define EXT2F_INCOMPAT_META_BG 0x0010 #define EXT2F_INCOMPAT_EXTENTS 0x0040 #define EXT2F_INCOMPAT_64BIT 0x0080 #define EXT2F_INCOMPAT_MMP 0x0100 #define EXT2F_INCOMPAT_FLEX_BG 0x0200 #define EXT2F_INCOMPAT_EA_INODE 0x0400 #define EXT2F_INCOMPAT_DIRDATA 0x1000 #define EXT2F_INCOMPAT_CSUM_SEED 0x2000 #define EXT2F_INCOMPAT_LARGEDIR 0x4000 #define EXT2F_INCOMPAT_INLINE_DATA 0x8000 #define EXT2F_INCOMPAT_ENCRYPT 0x10000 /* * Features supported in this implementation * * We support the following REV1 features: * - EXT2F_ROCOMPAT_SPARSESUPER * - EXT2F_ROCOMPAT_LARGEFILE * - EXT2F_ROCOMPAT_EXTRA_ISIZE * - EXT2F_INCOMPAT_FTYPE * * We partially (read-only) support the following EXT4 features: * - EXT2F_ROCOMPAT_HUGE_FILE * - EXT2F_INCOMPAT_EXTENTS * * We do not support these EXT4 features but they are irrelevant * for read-only support: * - EXT2F_INCOMPAT_RECOVER * - EXT2F_INCOMPAT_FLEX_BG * - EXT2F_INCOMPAT_META_BG */ #define EXT2F_COMPAT_SUPP EXT2F_COMPAT_DIRHASHINDEX #define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER | \ EXT2F_ROCOMPAT_LARGEFILE | \ EXT2F_ROCOMPAT_GDT_CSUM | \ + EXT2F_ROCOMPAT_DIR_NLINK | \ EXT2F_ROCOMPAT_HUGE_FILE | \ EXT2F_ROCOMPAT_EXTRA_ISIZE) #define EXT2F_INCOMPAT_SUPP EXT2F_INCOMPAT_FTYPE #define EXT4F_RO_INCOMPAT_SUPP (EXT2F_INCOMPAT_EXTENTS | \ EXT2F_INCOMPAT_RECOVER | \ EXT2F_INCOMPAT_FLEX_BG | \ EXT2F_INCOMPAT_META_BG ) /* Assume that user mode programs are passing in an ext2fs superblock, not * a kernel struct super_block. This will allow us to call the feature-test * macros from user land. */ #define EXT2_SB(sb) (sb) /* * Feature set definitions */ #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ ( EXT2_SB(sb)->e2fs->e2fs_features_compat & htole32(mask) ) #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ ( EXT2_SB(sb)->e2fs->e2fs_features_rocompat & htole32(mask) ) #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ ( EXT2_SB(sb)->e2fs->e2fs_features_incompat & htole32(mask) ) /* * File clean flags */ #define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */ #define E2FS_ERRORS 0x0002 /* Errors detected */ /* * Filesystem miscellaneous flags */ #define E2FS_SIGNED_HASH 0x0001 #define E2FS_UNSIGNED_HASH 0x0002 #define EXT2_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ #define EXT2_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ #define EXT2_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ /* ext2 file system block group descriptor */ struct ext2_gd { uint32_t ext2bgd_b_bitmap; /* blocks bitmap block */ uint32_t ext2bgd_i_bitmap; /* inodes bitmap block */ uint32_t ext2bgd_i_tables; /* inodes table block */ uint16_t ext2bgd_nbfree; /* number of free blocks */ uint16_t ext2bgd_nifree; /* number of free inodes */ uint16_t ext2bgd_ndirs; /* number of directories */ uint16_t ext4bgd_flags; /* block group flags */ uint32_t ext4bgd_x_bitmap; /* snapshot exclusion bitmap loc. */ uint16_t ext4bgd_b_bmap_csum; /* block bitmap checksum */ uint16_t ext4bgd_i_bmap_csum; /* inode bitmap checksum */ uint16_t ext4bgd_i_unused; /* unused inode count */ uint16_t ext4bgd_csum; /* group descriptor checksum */ }; /* EXT2FS metadata is stored in little-endian byte order. These macros * help reading it. */ #define e2fs_cgload(old, new, size) memcpy((new), (old), (size)); #define e2fs_cgsave(old, new, size) memcpy((new), (old), (size)); /* * Macro-instructions used to manage several block sizes */ #define EXT2_MAX_BLOCK_SIZE 4096 #define EXT2_MIN_BLOCK_LOG_SIZE 10 #define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize) #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t)) #define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize) /* * Macro-instructions used to manage fragments */ #define EXT2_MIN_FRAG_SIZE 1024 #define EXT2_MAX_FRAG_SIZE 4096 #define EXT2_MIN_FRAG_LOG_SIZE 10 #define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize) #define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb) /* * Macro-instructions used to manage group descriptors */ #define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg) #endif /* !_FS_EXT2FS_EXT2FS_H_ */ Index: head/sys/fs/ext2fs/inode.h =================================================================== --- head/sys/fs/ext2fs/inode.h (revision 320210) +++ head/sys/fs/ext2fs/inode.h (revision 320211) @@ -1,189 +1,189 @@ /*- * Copyright (c) 1982, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. * * @(#)inode.h 8.9 (Berkeley) 5/14/95 * $FreeBSD$ */ #ifndef _FS_EXT2FS_INODE_H_ #define _FS_EXT2FS_INODE_H_ #include #include #include #include #include /* * This must agree with the definition in . */ #define doff_t int32_t #define EXT2_NDADDR 12 /* Direct addresses in inode. */ #define EXT2_NIADDR 3 /* Indirect addresses in inode. */ /* * The size of physical and logical block numbers in EXT2FS. */ typedef uint32_t e2fs_daddr_t; typedef int64_t e2fs_lbn_t; typedef int64_t e4fs_daddr_t; /* * The inode is used to describe each active (or recently active) file in the * EXT2FS filesystem. It is composed of two types of information. The first * part is the information that is needed only while the file is active (such * as the identity of the file and linkage to speed its lookup). The second * part is the permanent meta-data associated with the file which is read in * from the permanent dinode from long term storage when the file becomes * active, and is put back when the file is no longer being used. */ struct inode { struct vnode *i_vnode;/* Vnode associated with this inode. */ struct ext2mount *i_ump; uint32_t i_flag; /* flags, see below */ ino_t i_number; /* The identity of the inode. */ struct m_ext2fs *i_e2fs; /* EXT2FS */ u_quad_t i_modrev; /* Revision level for NFS lease. */ /* * Side effects; used during directory lookup. */ int32_t i_count; /* Size of free slot in directory. */ doff_t i_endoff; /* End of useful stuff in directory. */ doff_t i_diroff; /* Offset in dir, where we found last entry. */ doff_t i_offset; /* Offset of free space in directory. */ uint32_t i_block_group; uint32_t i_next_alloc_block; uint32_t i_next_alloc_goal; /* Fields from struct dinode in UFS. */ uint16_t i_mode; /* IFMT, permissions; see below. */ - int16_t i_nlink; /* File link count. */ + int32_t i_nlink; /* File link count. */ uint32_t i_uid; /* File owner. */ uint32_t i_gid; /* File group. */ uint64_t i_size; /* File byte count. */ uint64_t i_blocks; /* Blocks actually held. */ int32_t i_atime; /* Last access time. */ int32_t i_mtime; /* Last modified time. */ int32_t i_ctime; /* Last inode change time. */ int32_t i_birthtime; /* Inode creation time. */ int32_t i_mtimensec; /* Last modified time. */ int32_t i_atimensec; /* Last access time. */ int32_t i_ctimensec; /* Last inode change time. */ int32_t i_birthnsec; /* Inode creation time. */ uint32_t i_gen; /* Generation number. */ uint64_t i_facl; /* EA block number. */ uint32_t i_flags; /* Status flags (chflags). */ uint32_t i_db[EXT2_NDADDR]; /* Direct disk blocks. */ uint32_t i_ib[EXT2_NIADDR]; /* Indirect disk blocks. */ struct ext4_extent_cache i_ext_cache; /* cache for ext4 extent */ }; /* * The di_db fields may be overlaid with other information for * file types that do not have associated disk storage. Block * and character devices overlay the first data block with their * dev_t value. Short symbolic links place their path in the * di_db area. */ #define i_shortlink i_db #define i_rdev i_db[0] /* File permissions. */ #define IEXEC 0000100 /* Executable. */ #define IWRITE 0000200 /* Writeable. */ #define IREAD 0000400 /* Readable. */ #define ISVTX 0001000 /* Sticky bit. */ #define ISGID 0002000 /* Set-gid. */ #define ISUID 0004000 /* Set-uid. */ /* File types. */ #define IFMT 0170000 /* Mask of file type. */ #define IFIFO 0010000 /* Named pipe (fifo). */ #define IFCHR 0020000 /* Character device. */ #define IFDIR 0040000 /* Directory file. */ #define IFBLK 0060000 /* Block device. */ #define IFREG 0100000 /* Regular file. */ #define IFLNK 0120000 /* Symbolic link. */ #define IFSOCK 0140000 /* UNIX domain socket. */ #define IFWHT 0160000 /* Whiteout. */ /* These flags are kept in i_flag. */ #define IN_ACCESS 0x0001 /* Access time update request. */ #define IN_CHANGE 0x0002 /* Inode change time update request. */ #define IN_UPDATE 0x0004 /* Modification time update request. */ #define IN_MODIFIED 0x0008 /* Inode has been modified. */ #define IN_RENAME 0x0010 /* Inode is being renamed. */ #define IN_HASHED 0x0020 /* Inode is on hash list */ #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ #define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the suspension finished */ /* * These are translation flags for some attributes that Ext4 * passes as inode flags but that we cannot pass directly. */ #define IN_E3INDEX 0x010000 #define IN_E4EXTENTS 0x020000 #define i_devvp i_ump->um_devvp #ifdef _KERNEL /* * Structure used to pass around logical block paths generated by * ext2_getlbns and used by truncate and bmap code. */ struct indir { e2fs_lbn_t in_lbn; /* Logical block number. */ int in_off; /* Offset in buffer. */ }; /* Convert between inode pointers and vnode pointers. */ #define VTOI(vp) ((struct inode *)(vp)->v_data) #define ITOV(ip) ((ip)->i_vnode) /* This overlays the fid structure (see mount.h). */ struct ufid { uint16_t ufid_len; /* Length of structure. */ uint16_t ufid_pad; /* Force 32-bit alignment. */ ino_t ufid_ino; /* File number (ino). */ uint32_t ufid_gen; /* Generation number. */ }; #endif /* _KERNEL */ #endif /* !_FS_EXT2FS_INODE_H_ */