/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 1991, 1993, 1994 * The Regents of the University of California. 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. * 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. * * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_quota.h" #include "opt_ufs.h" #include "opt_ffs.h" #include "opt_ddb.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 #include #include #include #include #include #include #include static uma_zone_t uma_inode, uma_ufs1, uma_ufs2; VFS_SMR_DECLARE; static int ffs_mountfs(struct vnode *, struct mount *, struct thread *); static void ffs_oldfscompat_read(struct fs *, struct ufsmount *, ufs2_daddr_t); static void ffs_ifree(struct ufsmount *ump, struct inode *ip); static int ffs_sync_lazy(struct mount *mp); static int ffs_use_bread(void *devfd, off_t loc, void **bufp, int size); static int ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size); static vfs_init_t ffs_init; static vfs_uninit_t ffs_uninit; static vfs_extattrctl_t ffs_extattrctl; static vfs_cmount_t ffs_cmount; static vfs_unmount_t ffs_unmount; static vfs_mount_t ffs_mount; static vfs_statfs_t ffs_statfs; static vfs_fhtovp_t ffs_fhtovp; static vfs_sync_t ffs_sync; static struct vfsops ufs_vfsops = { .vfs_extattrctl = ffs_extattrctl, .vfs_fhtovp = ffs_fhtovp, .vfs_init = ffs_init, .vfs_mount = ffs_mount, .vfs_cmount = ffs_cmount, .vfs_quotactl = ufs_quotactl, .vfs_root = vfs_cache_root, .vfs_cachedroot = ufs_root, .vfs_statfs = ffs_statfs, .vfs_sync = ffs_sync, .vfs_uninit = ffs_uninit, .vfs_unmount = ffs_unmount, .vfs_vget = ffs_vget, .vfs_susp_clean = process_deferred_inactive, }; VFS_SET(ufs_vfsops, ufs, 0); MODULE_VERSION(ufs, 1); static b_strategy_t ffs_geom_strategy; static b_write_t ffs_bufwrite; static struct buf_ops ffs_ops = { .bop_name = "FFS", .bop_write = ffs_bufwrite, .bop_strategy = ffs_geom_strategy, .bop_sync = bufsync, #ifdef NO_FFS_SNAPSHOT .bop_bdflush = bufbdflush, #else .bop_bdflush = ffs_bdflush, #endif }; /* * Note that userquota and groupquota options are not currently used * by UFS/FFS code and generally mount(8) does not pass those options * from userland, but they can be passed by loader(8) via * vfs.root.mountfrom.options. */ static const char *ffs_opts[] = { "acls", "async", "noatime", "noclusterr", "noclusterw", "noexec", "export", "force", "from", "groupquota", "multilabel", "nfsv4acls", "snapshot", "nosuid", "suiddir", "nosymfollow", "sync", "union", "userquota", "untrusted", NULL }; static int ffs_enxio_enable = 1; SYSCTL_DECL(_vfs_ffs); SYSCTL_INT(_vfs_ffs, OID_AUTO, enxio_enable, CTLFLAG_RWTUN, &ffs_enxio_enable, 0, "enable mapping of other disk I/O errors to ENXIO"); /* * Return buffer with the contents of block "offset" from the beginning of * directory "ip". If "res" is non-zero, fill it in with a pointer to the * remaining space in the directory. */ static int ffs_blkatoff(struct vnode *vp, off_t offset, char **res, struct buf **bpp) { struct inode *ip; struct fs *fs; struct buf *bp; ufs_lbn_t lbn; int bsize, error; ip = VTOI(vp); fs = ITOFS(ip); lbn = lblkno(fs, offset); bsize = blksize(fs, ip, lbn); *bpp = NULL; error = bread(vp, lbn, bsize, NOCRED, &bp); if (error) { return (error); } if (res) *res = (char *)bp->b_data + blkoff(fs, offset); *bpp = bp; return (0); } /* * Load up the contents of an inode and copy the appropriate pieces * to the incore copy. */ static int ffs_load_inode(struct buf *bp, struct inode *ip, struct fs *fs, ino_t ino) { struct ufs1_dinode *dip1; struct ufs2_dinode *dip2; int error; if (I_IS_UFS1(ip)) { dip1 = ip->i_din1; *dip1 = *((struct ufs1_dinode *)bp->b_data + ino_to_fsbo(fs, ino)); ip->i_mode = dip1->di_mode; ip->i_nlink = dip1->di_nlink; ip->i_effnlink = dip1->di_nlink; ip->i_size = dip1->di_size; ip->i_flags = dip1->di_flags; ip->i_gen = dip1->di_gen; ip->i_uid = dip1->di_uid; ip->i_gid = dip1->di_gid; return (0); } dip2 = ((struct ufs2_dinode *)bp->b_data + ino_to_fsbo(fs, ino)); if ((error = ffs_verify_dinode_ckhash(fs, dip2)) != 0 && !ffs_fsfail_cleanup(ITOUMP(ip), error)) { printf("%s: inode %jd: check-hash failed\n", fs->fs_fsmnt, (intmax_t)ino); return (error); } *ip->i_din2 = *dip2; dip2 = ip->i_din2; ip->i_mode = dip2->di_mode; ip->i_nlink = dip2->di_nlink; ip->i_effnlink = dip2->di_nlink; ip->i_size = dip2->di_size; ip->i_flags = dip2->di_flags; ip->i_gen = dip2->di_gen; ip->i_uid = dip2->di_uid; ip->i_gid = dip2->di_gid; return (0); } /* * Verify that a filesystem block number is a valid data block. * This routine is only called on untrusted filesystems. */ static int ffs_check_blkno(struct mount *mp, ino_t inum, ufs2_daddr_t daddr, int blksize) { struct fs *fs; struct ufsmount *ump; ufs2_daddr_t end_daddr; int cg, havemtx; KASSERT((mp->mnt_flag & MNT_UNTRUSTED) != 0, ("ffs_check_blkno called on a trusted file system")); ump = VFSTOUFS(mp); fs = ump->um_fs; cg = dtog(fs, daddr); end_daddr = daddr + numfrags(fs, blksize); /* * Verify that the block number is a valid data block. Also check * that it does not point to an inode block or a superblock. Accept * blocks that are unalloacted (0) or part of snapshot metadata * (BLK_NOCOPY or BLK_SNAP). * * Thus, the block must be in a valid range for the filesystem and * either in the space before a backup superblock (except the first * cylinder group where that space is used by the bootstrap code) or * after the inode blocks and before the end of the cylinder group. */ if ((uint64_t)daddr <= BLK_SNAP || ((uint64_t)end_daddr <= fs->fs_size && ((cg > 0 && end_daddr <= cgsblock(fs, cg)) || (daddr >= cgdmin(fs, cg) && end_daddr <= cgbase(fs, cg) + fs->fs_fpg)))) return (0); if ((havemtx = mtx_owned(UFS_MTX(ump))) == 0) UFS_LOCK(ump); if (ppsratecheck(&ump->um_last_integritymsg, &ump->um_secs_integritymsg, 1)) { UFS_UNLOCK(ump); uprintf("\n%s: inode %jd, out-of-range indirect block " "number %jd\n", mp->mnt_stat.f_mntonname, inum, daddr); if (havemtx) UFS_LOCK(ump); } else if (!havemtx) UFS_UNLOCK(ump); return (EINTEGRITY); } /* * On first ENXIO error, initiate an asynchronous forcible unmount. * Used to unmount filesystems whose underlying media has gone away. * * Return true if a cleanup is in progress. */ int ffs_fsfail_cleanup(struct ufsmount *ump, int error) { int retval; UFS_LOCK(ump); retval = ffs_fsfail_cleanup_locked(ump, error); UFS_UNLOCK(ump); return (retval); } int ffs_fsfail_cleanup_locked(struct ufsmount *ump, int error) { mtx_assert(UFS_MTX(ump), MA_OWNED); if (error == ENXIO && (ump->um_flags & UM_FSFAIL_CLEANUP) == 0) { ump->um_flags |= UM_FSFAIL_CLEANUP; /* * Queue an async forced unmount. */ vfs_ref(ump->um_mountp); dounmount(ump->um_mountp, MNT_FORCE | MNT_RECURSE | MNT_DEFERRED, curthread); printf("UFS: forcibly unmounting %s from %s\n", ump->um_mountp->mnt_stat.f_mntfromname, ump->um_mountp->mnt_stat.f_mntonname); } return ((ump->um_flags & UM_FSFAIL_CLEANUP) != 0); } /* * Wrapper used during ENXIO cleanup to allocate empty buffers when * the kernel is unable to read the real one. They are needed so that * the soft updates code can use them to unwind its dependencies. */ int ffs_breadz(struct ufsmount *ump, struct vnode *vp, daddr_t lblkno, daddr_t dblkno, int size, daddr_t *rablkno, int *rabsize, int cnt, struct ucred *cred, int flags, void (*ckhashfunc)(struct buf *), struct buf **bpp) { int error; flags |= GB_CVTENXIO; error = breadn_flags(vp, lblkno, dblkno, size, rablkno, rabsize, cnt, cred, flags, ckhashfunc, bpp); if (error != 0 && ffs_fsfail_cleanup(ump, error)) { error = getblkx(vp, lblkno, dblkno, size, 0, 0, flags, bpp); KASSERT(error == 0, ("getblkx failed")); vfs_bio_bzero_buf(*bpp, 0, size); } return (error); } static int ffs_mount(struct mount *mp) { struct vnode *devvp, *odevvp; struct thread *td; struct ufsmount *ump = NULL; struct fs *fs; int error, flags; int error1 __diagused; uint64_t mntorflags, saved_mnt_flag; accmode_t accmode; struct nameidata ndp; char *fspec; bool mounted_softdep; td = curthread; if (vfs_filteropt(mp->mnt_optnew, ffs_opts)) return (EINVAL); if (uma_inode == NULL) { uma_inode = uma_zcreate("FFS inode", sizeof(struct inode), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); uma_ufs1 = uma_zcreate("FFS1 dinode", sizeof(struct ufs1_dinode), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); uma_ufs2 = uma_zcreate("FFS2 dinode", sizeof(struct ufs2_dinode), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); VFS_SMR_ZONE_SET(uma_inode); } vfs_deleteopt(mp->mnt_optnew, "groupquota"); vfs_deleteopt(mp->mnt_optnew, "userquota"); fspec = vfs_getopts(mp->mnt_optnew, "from", &error); if (error) return (error); mntorflags = 0; if (vfs_getopt(mp->mnt_optnew, "untrusted", NULL, NULL) == 0) mntorflags |= MNT_UNTRUSTED; if (vfs_getopt(mp->mnt_optnew, "acls", NULL, NULL) == 0) mntorflags |= MNT_ACLS; if (vfs_getopt(mp->mnt_optnew, "snapshot", NULL, NULL) == 0) { mntorflags |= MNT_SNAPSHOT; /* * Once we have set the MNT_SNAPSHOT flag, do not * persist "snapshot" in the options list. */ vfs_deleteopt(mp->mnt_optnew, "snapshot"); vfs_deleteopt(mp->mnt_opt, "snapshot"); } if (vfs_getopt(mp->mnt_optnew, "nfsv4acls", NULL, NULL) == 0) { if (mntorflags & MNT_ACLS) { vfs_mount_error(mp, "\"acls\" and \"nfsv4acls\" options " "are mutually exclusive"); return (EINVAL); } mntorflags |= MNT_NFS4ACLS; } MNT_ILOCK(mp); mp->mnt_kern_flag &= ~MNTK_FPLOOKUP; mp->mnt_flag |= mntorflags; MNT_IUNLOCK(mp); /* * If updating, check whether changing from read-only to * read/write; if there is no device name, that's all we do. */ if (mp->mnt_flag & MNT_UPDATE) { ump = VFSTOUFS(mp); fs = ump->um_fs; odevvp = ump->um_odevvp; devvp = ump->um_devvp; if (fs->fs_ronly == 0 && vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { /* * Flush any dirty data and suspend filesystem. */ if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) return (error); error = vfs_write_suspend_umnt(mp); if (error != 0) return (error); fs->fs_ronly = 1; if (MOUNTEDSOFTDEP(mp)) { MNT_ILOCK(mp); mp->mnt_flag &= ~MNT_SOFTDEP; MNT_IUNLOCK(mp); mounted_softdep = true; } else mounted_softdep = false; /* * Check for and optionally get rid of files open * for writing. */ flags = WRITECLOSE; if (mp->mnt_flag & MNT_FORCE) flags |= FORCECLOSE; if (mounted_softdep) { error = softdep_flushfiles(mp, flags, td); } else { error = ffs_flushfiles(mp, flags, td); } if (error) { fs->fs_ronly = 0; if (mounted_softdep) { MNT_ILOCK(mp); mp->mnt_flag |= MNT_SOFTDEP; MNT_IUNLOCK(mp); } vfs_write_resume(mp, 0); return (error); } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("WARNING: %s Update error: blocks %jd " "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) fs->fs_clean = 1; if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { fs->fs_ronly = 0; fs->fs_clean = 0; if (mounted_softdep) { MNT_ILOCK(mp); mp->mnt_flag |= MNT_SOFTDEP; MNT_IUNLOCK(mp); } vfs_write_resume(mp, 0); return (error); } if (mounted_softdep) softdep_unmount(mp); g_topology_lock(); /* * Drop our write and exclusive access. */ g_access(ump->um_cp, 0, -1, -1); g_topology_unlock(); MNT_ILOCK(mp); mp->mnt_flag |= MNT_RDONLY; MNT_IUNLOCK(mp); /* * Allow the writers to note that filesystem * is ro now. */ vfs_write_resume(mp, 0); } if ((mp->mnt_flag & MNT_RELOAD) && (error = ffs_reload(mp, 0)) != 0) return (error); if (fs->fs_ronly && !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { /* * If upgrade to read-write by non-root, then verify * that user has necessary permissions on the device. */ vn_lock(odevvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_ACCESS(odevvp, VREAD | VWRITE, td->td_ucred, td); if (error) error = priv_check(td, PRIV_VFS_MOUNT_PERM); VOP_UNLOCK(odevvp); if (error) { return (error); } fs->fs_flags &= ~FS_UNCLEAN; if (fs->fs_clean == 0) { fs->fs_flags |= FS_UNCLEAN; if ((mp->mnt_flag & MNT_FORCE) || ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && (fs->fs_flags & FS_DOSOFTDEP))) { printf("WARNING: %s was not properly " "dismounted\n", fs->fs_fsmnt); } else { vfs_mount_error(mp, "R/W mount of %s denied. %s.%s", fs->fs_fsmnt, "Filesystem is not clean - run fsck", (fs->fs_flags & FS_SUJ) == 0 ? "" : " Forced mount will invalidate" " journal contents"); return (EPERM); } } g_topology_lock(); /* * Request exclusive write access. */ error = g_access(ump->um_cp, 0, 1, 1); g_topology_unlock(); if (error) return (error); if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) return (error); error = vfs_write_suspend_umnt(mp); if (error != 0) return (error); fs->fs_ronly = 0; MNT_ILOCK(mp); saved_mnt_flag = MNT_RDONLY; if (MOUNTEDSOFTDEP(mp) && (mp->mnt_flag & MNT_ASYNC) != 0) saved_mnt_flag |= MNT_ASYNC; mp->mnt_flag &= ~saved_mnt_flag; MNT_IUNLOCK(mp); fs->fs_mtime = time_second; /* check to see if we need to start softdep */ if ((fs->fs_flags & FS_DOSOFTDEP) && (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ fs->fs_ronly = 1; MNT_ILOCK(mp); mp->mnt_flag |= saved_mnt_flag; MNT_IUNLOCK(mp); vfs_write_resume(mp, 0); return (error); } fs->fs_clean = 0; if ((error = ffs_sbupdate(ump, MNT_WAIT, 0)) != 0) { fs->fs_ronly = 1; if ((fs->fs_flags & FS_DOSOFTDEP) != 0) softdep_unmount(mp); MNT_ILOCK(mp); mp->mnt_flag |= saved_mnt_flag; MNT_IUNLOCK(mp); vfs_write_resume(mp, 0); return (error); } if (fs->fs_snapinum[0] != 0) ffs_snapshot_mount(mp); vfs_write_resume(mp, 0); } /* * Soft updates is incompatible with "async", * so if we are doing softupdates stop the user * from setting the async flag in an update. * Softdep_mount() clears it in an initial mount * or ro->rw remount. */ if (MOUNTEDSOFTDEP(mp)) { /* XXX: Reset too late ? */ MNT_ILOCK(mp); mp->mnt_flag &= ~MNT_ASYNC; MNT_IUNLOCK(mp); } /* * Keep MNT_ACLS flag if it is stored in superblock. */ if ((fs->fs_flags & FS_ACLS) != 0) { /* XXX: Set too late ? */ MNT_ILOCK(mp); mp->mnt_flag |= MNT_ACLS; MNT_IUNLOCK(mp); } if ((fs->fs_flags & FS_NFS4ACLS) != 0) { /* XXX: Set too late ? */ MNT_ILOCK(mp); mp->mnt_flag |= MNT_NFS4ACLS; MNT_IUNLOCK(mp); } /* * If this is a snapshot request, take the snapshot. */ if (mp->mnt_flag & MNT_SNAPSHOT) return (ffs_snapshot(mp, fspec)); /* * Must not call namei() while owning busy ref. */ vfs_unbusy(mp); } /* * Not an update, or updating the name: look up the name * and verify that it refers to a sensible disk device. */ NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec); error = namei(&ndp); if ((mp->mnt_flag & MNT_UPDATE) != 0) { /* * Unmount does not start if MNT_UPDATE is set. Mount * update busies mp before setting MNT_UPDATE. We * must be able to retain our busy ref succesfully, * without sleep. */ error1 = vfs_busy(mp, MBF_NOWAIT); MPASS(error1 == 0); } if (error != 0) return (error); NDFREE(&ndp, NDF_ONLY_PNBUF); devvp = ndp.ni_vp; if (!vn_isdisk_error(devvp, &error)) { vput(devvp); return (error); } /* * If mount by non-root, then verify that user has necessary * permissions on the device. */ accmode = VREAD; if ((mp->mnt_flag & MNT_RDONLY) == 0) accmode |= VWRITE; error = VOP_ACCESS(devvp, accmode, td->td_ucred, td); if (error) error = priv_check(td, PRIV_VFS_MOUNT_PERM); if (error) { vput(devvp); return (error); } if (mp->mnt_flag & MNT_UPDATE) { /* * Update only * * If it's not the same vnode, or at least the same device * then it's not correct. */ if (devvp->v_rdev != ump->um_devvp->v_rdev) error = EINVAL; /* needs translation */ vput(devvp); if (error) return (error); } else { /* * New mount * * We need the name for the mount point (also used for * "last mounted on") copied in. If an error occurs, * the mount point is discarded by the upper level code. * Note that vfs_mount_alloc() populates f_mntonname for us. */ if ((error = ffs_mountfs(devvp, mp, td)) != 0) { vrele(devvp); return (error); } } MNT_ILOCK(mp); /* * This is racy versus lookup, see ufs_fplookup_vexec for details. */ if ((mp->mnt_kern_flag & MNTK_FPLOOKUP) != 0) panic("MNTK_FPLOOKUP set on mount %p when it should not be", mp); if ((mp->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS | MNT_UNION)) == 0) mp->mnt_kern_flag |= MNTK_FPLOOKUP; MNT_IUNLOCK(mp); vfs_mountedfrom(mp, fspec); return (0); } /* * Compatibility with old mount system call. */ static int ffs_cmount(struct mntarg *ma, void *data, uint64_t flags) { struct ufs_args args; int error; if (data == NULL) return (EINVAL); error = copyin(data, &args, sizeof args); if (error) return (error); ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); ma = mount_arg(ma, "export", &args.export, sizeof(args.export)); error = kernel_mount(ma, flags); return (error); } /* * Reload all incore data for a filesystem (used after running fsck on * the root filesystem and finding things to fix). If the 'force' flag * is 0, the filesystem must be mounted read-only. * * Things to do to update the mount: * 1) invalidate all cached meta-data. * 2) re-read superblock from disk. * 3) re-read summary information from disk. * 4) invalidate all inactive vnodes. * 5) clear MNTK_SUSPEND2 and MNTK_SUSPENDED flags, allowing secondary * writers, if requested. * 6) invalidate all cached file data. * 7) re-read inode data for all active vnodes. */ int ffs_reload(struct mount *mp, int flags) { struct vnode *vp, *mvp, *devvp; struct inode *ip; void *space; struct buf *bp; struct fs *fs, *newfs; struct ufsmount *ump; ufs2_daddr_t sblockloc; int i, blks, error; u_long size; int32_t *lp; ump = VFSTOUFS(mp); MNT_ILOCK(mp); if ((mp->mnt_flag & MNT_RDONLY) == 0 && (flags & FFSR_FORCE) == 0) { MNT_IUNLOCK(mp); return (EINVAL); } MNT_IUNLOCK(mp); /* * Step 1: invalidate all cached meta-data. */ devvp = VFSTOUFS(mp)->um_devvp; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); if (vinvalbuf(devvp, 0, 0, 0) != 0) panic("ffs_reload: dirty1"); VOP_UNLOCK(devvp); /* * Step 2: re-read superblock from disk. */ fs = VFSTOUFS(mp)->um_fs; if ((error = bread(devvp, btodb(fs->fs_sblockloc), fs->fs_sbsize, NOCRED, &bp)) != 0) return (error); newfs = (struct fs *)bp->b_data; if ((newfs->fs_magic != FS_UFS1_MAGIC && newfs->fs_magic != FS_UFS2_MAGIC) || newfs->fs_bsize > MAXBSIZE || newfs->fs_bsize < sizeof(struct fs)) { brelse(bp); return (EIO); /* XXX needs translation */ } /* * Preserve the summary information, read-only status, and * superblock location by copying these fields into our new * superblock before using it to update the existing superblock. */ newfs->fs_si = fs->fs_si; newfs->fs_ronly = fs->fs_ronly; sblockloc = fs->fs_sblockloc; bcopy(newfs, fs, (u_int)fs->fs_sbsize); brelse(bp); ump->um_maxsymlinklen = fs->fs_maxsymlinklen; ffs_oldfscompat_read(fs, VFSTOUFS(mp), sblockloc); UFS_LOCK(ump); if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("WARNING: %s: reload pending error: blocks %jd " "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } UFS_UNLOCK(ump); /* * Step 3: re-read summary information from disk. */ size = fs->fs_cssize; blks = howmany(size, fs->fs_fsize); if (fs->fs_contigsumsize > 0) size += fs->fs_ncg * sizeof(int32_t); size += fs->fs_ncg * sizeof(u_int8_t); free(fs->fs_csp, M_UFSMNT); space = malloc(size, M_UFSMNT, M_WAITOK); fs->fs_csp = space; for (i = 0; i < blks; i += fs->fs_frag) { size = fs->fs_bsize; if (i + fs->fs_frag > blks) size = (blks - i) * fs->fs_fsize; error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, NOCRED, &bp); if (error) return (error); bcopy(bp->b_data, space, (u_int)size); space = (char *)space + size; brelse(bp); } /* * We no longer know anything about clusters per cylinder group. */ if (fs->fs_contigsumsize > 0) { fs->fs_maxcluster = lp = space; for (i = 0; i < fs->fs_ncg; i++) *lp++ = fs->fs_contigsumsize; space = lp; } size = fs->fs_ncg * sizeof(u_int8_t); fs->fs_contigdirs = (u_int8_t *)space; bzero(fs->fs_contigdirs, size); if ((flags & FFSR_UNSUSPEND) != 0) { MNT_ILOCK(mp); mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2); wakeup(&mp->mnt_flag); MNT_IUNLOCK(mp); } loop: MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { /* * Skip syncer vnode. */ if (vp->v_type == VNON) { VI_UNLOCK(vp); continue; } /* * Step 4: invalidate all cached file data. */ if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) { MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); goto loop; } if (vinvalbuf(vp, 0, 0, 0)) panic("ffs_reload: dirty2"); /* * Step 5: re-read inode data for all active vnodes. */ ip = VTOI(vp); error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), (int)fs->fs_bsize, NOCRED, &bp); if (error) { vput(vp); MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); return (error); } if ((error = ffs_load_inode(bp, ip, fs, ip->i_number)) != 0) { brelse(bp); vput(vp); MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); return (error); } ip->i_effnlink = ip->i_nlink; brelse(bp); vput(vp); } return (0); } /* * Common code for mount and mountroot */ static int ffs_mountfs(odevvp, mp, td) struct vnode *odevvp; struct mount *mp; struct thread *td; { struct ufsmount *ump; struct fs *fs; struct cdev *dev; int error, i, len, ronly; struct ucred *cred; struct g_consumer *cp; struct mount *nmp; struct vnode *devvp; int candelete, canspeedup; off_t loc; fs = NULL; ump = NULL; cred = td ? td->td_ucred : NOCRED; ronly = (mp->mnt_flag & MNT_RDONLY) != 0; devvp = mntfs_allocvp(mp, odevvp); VOP_UNLOCK(odevvp); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); KASSERT(devvp->v_type == VCHR, ("reclaimed devvp")); dev = devvp->v_rdev; KASSERT(dev->si_snapdata == NULL, ("non-NULL snapshot data")); if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0, (uintptr_t)mp) == 0) { mntfs_freevp(devvp); return (EBUSY); } g_topology_lock(); error = g_vfs_open(devvp, &cp, "ffs", ronly ? 0 : 1); g_topology_unlock(); if (error != 0) { atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); mntfs_freevp(devvp); return (error); } dev_ref(dev); devvp->v_bufobj.bo_ops = &ffs_ops; BO_LOCK(&odevvp->v_bufobj); odevvp->v_bufobj.bo_flag |= BO_NOBUFS; BO_UNLOCK(&odevvp->v_bufobj); VOP_UNLOCK(devvp); if (dev->si_iosize_max != 0) mp->mnt_iosize_max = dev->si_iosize_max; if (mp->mnt_iosize_max > maxphys) mp->mnt_iosize_max = maxphys; if ((SBLOCKSIZE % cp->provider->sectorsize) != 0) { error = EINVAL; vfs_mount_error(mp, "Invalid sectorsize %d for superblock size %d", cp->provider->sectorsize, SBLOCKSIZE); goto out; } /* fetch the superblock and summary information */ loc = STDSB; if ((mp->mnt_flag & (MNT_ROOTFS | MNT_FORCE)) != 0) loc = STDSB_NOHASHFAIL; if ((error = ffs_sbget(devvp, &fs, loc, M_UFSMNT, ffs_use_bread)) != 0) goto out; fs->fs_flags &= ~FS_UNCLEAN; if (fs->fs_clean == 0) { fs->fs_flags |= FS_UNCLEAN; if (ronly || (mp->mnt_flag & MNT_FORCE) || ((fs->fs_flags & (FS_SUJ | FS_NEEDSFSCK)) == 0 && (fs->fs_flags & FS_DOSOFTDEP))) { printf("WARNING: %s was not properly dismounted\n", fs->fs_fsmnt); } else { vfs_mount_error(mp, "R/W mount of %s denied. %s%s", fs->fs_fsmnt, "Filesystem is not clean - run fsck.", (fs->fs_flags & FS_SUJ) == 0 ? "" : " Forced mount will invalidate journal contents"); error = EPERM; goto out; } if ((fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) && (mp->mnt_flag & MNT_FORCE)) { printf("WARNING: %s: lost blocks %jd files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("WARNING: %s: mount pending error: blocks %jd " "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } if ((fs->fs_flags & FS_GJOURNAL) != 0) { #ifdef UFS_GJOURNAL /* * Get journal provider name. */ len = 1024; mp->mnt_gjprovider = malloc((u_long)len, M_UFSMNT, M_WAITOK); if (g_io_getattr("GJOURNAL::provider", cp, &len, mp->mnt_gjprovider) == 0) { mp->mnt_gjprovider = realloc(mp->mnt_gjprovider, len, M_UFSMNT, M_WAITOK); MNT_ILOCK(mp); mp->mnt_flag |= MNT_GJOURNAL; MNT_IUNLOCK(mp); } else { if ((mp->mnt_flag & MNT_RDONLY) == 0) printf("WARNING: %s: GJOURNAL flag on fs " "but no gjournal provider below\n", mp->mnt_stat.f_mntonname); free(mp->mnt_gjprovider, M_UFSMNT); mp->mnt_gjprovider = NULL; } #else printf("WARNING: %s: GJOURNAL flag on fs but no " "UFS_GJOURNAL support\n", mp->mnt_stat.f_mntonname); #endif } else { mp->mnt_gjprovider = NULL; } ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); ump->um_cp = cp; ump->um_bo = &devvp->v_bufobj; ump->um_fs = fs; if (fs->fs_magic == FS_UFS1_MAGIC) { ump->um_fstype = UFS1; ump->um_balloc = ffs_balloc_ufs1; } else { ump->um_fstype = UFS2; ump->um_balloc = ffs_balloc_ufs2; } ump->um_blkatoff = ffs_blkatoff; ump->um_truncate = ffs_truncate; ump->um_update = ffs_update; ump->um_valloc = ffs_valloc; ump->um_vfree = ffs_vfree; ump->um_ifree = ffs_ifree; ump->um_rdonly = ffs_rdonly; ump->um_snapgone = ffs_snapgone; if ((mp->mnt_flag & MNT_UNTRUSTED) != 0) ump->um_check_blkno = ffs_check_blkno; else ump->um_check_blkno = NULL; mtx_init(UFS_MTX(ump), "FFS", "FFS Lock", MTX_DEF); sx_init(&ump->um_checkpath_lock, "uchpth"); ffs_oldfscompat_read(fs, ump, fs->fs_sblockloc); fs->fs_ronly = ronly; fs->fs_active = NULL; mp->mnt_data = ump; mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; nmp = NULL; if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || (nmp = vfs_getvfs(&mp->mnt_stat.f_fsid))) { if (nmp) vfs_rel(nmp); vfs_getnewfsid(mp); } ump->um_maxsymlinklen = fs->fs_maxsymlinklen; MNT_ILOCK(mp); mp->mnt_flag |= MNT_LOCAL; MNT_IUNLOCK(mp); if ((fs->fs_flags & FS_MULTILABEL) != 0) { #ifdef MAC MNT_ILOCK(mp); mp->mnt_flag |= MNT_MULTILABEL; MNT_IUNLOCK(mp); #else printf("WARNING: %s: multilabel flag on fs but " "no MAC support\n", mp->mnt_stat.f_mntonname); #endif } if ((fs->fs_flags & FS_ACLS) != 0) { #ifdef UFS_ACL MNT_ILOCK(mp); if (mp->mnt_flag & MNT_NFS4ACLS) printf("WARNING: %s: ACLs flag on fs conflicts with " "\"nfsv4acls\" mount option; option ignored\n", mp->mnt_stat.f_mntonname); mp->mnt_flag &= ~MNT_NFS4ACLS; mp->mnt_flag |= MNT_ACLS; MNT_IUNLOCK(mp); #else printf("WARNING: %s: ACLs flag on fs but no ACLs support\n", mp->mnt_stat.f_mntonname); #endif } if ((fs->fs_flags & FS_NFS4ACLS) != 0) { #ifdef UFS_ACL MNT_ILOCK(mp); if (mp->mnt_flag & MNT_ACLS) printf("WARNING: %s: NFSv4 ACLs flag on fs conflicts " "with \"acls\" mount option; option ignored\n", mp->mnt_stat.f_mntonname); mp->mnt_flag &= ~MNT_ACLS; mp->mnt_flag |= MNT_NFS4ACLS; MNT_IUNLOCK(mp); #else printf("WARNING: %s: NFSv4 ACLs flag on fs but no " "ACLs support\n", mp->mnt_stat.f_mntonname); #endif } if ((fs->fs_flags & FS_TRIM) != 0) { len = sizeof(int); if (g_io_getattr("GEOM::candelete", cp, &len, &candelete) == 0) { if (candelete) ump->um_flags |= UM_CANDELETE; else printf("WARNING: %s: TRIM flag on fs but disk " "does not support TRIM\n", mp->mnt_stat.f_mntonname); } else { printf("WARNING: %s: TRIM flag on fs but disk does " "not confirm that it supports TRIM\n", mp->mnt_stat.f_mntonname); } if (((ump->um_flags) & UM_CANDELETE) != 0) { ump->um_trim_tq = taskqueue_create("trim", M_WAITOK, taskqueue_thread_enqueue, &ump->um_trim_tq); taskqueue_start_threads(&ump->um_trim_tq, 1, PVFS, "%s trim", mp->mnt_stat.f_mntonname); ump->um_trimhash = hashinit(MAXTRIMIO, M_TRIM, &ump->um_trimlisthashsize); } } len = sizeof(int); if (g_io_getattr("GEOM::canspeedup", cp, &len, &canspeedup) == 0) { if (canspeedup) ump->um_flags |= UM_CANSPEEDUP; } ump->um_mountp = mp; ump->um_dev = dev; ump->um_devvp = devvp; ump->um_odevvp = odevvp; ump->um_nindir = fs->fs_nindir; ump->um_bptrtodb = fs->fs_fsbtodb; ump->um_seqinc = fs->fs_frag; for (i = 0; i < MAXQUOTAS; i++) ump->um_quotas[i] = NULLVP; #ifdef UFS_EXTATTR ufs_extattr_uepm_init(&ump->um_extattr); #endif /* * Set FS local "last mounted on" information (NULL pad) */ bzero(fs->fs_fsmnt, MAXMNTLEN); strlcpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MAXMNTLEN); mp->mnt_stat.f_iosize = fs->fs_bsize; if (mp->mnt_flag & MNT_ROOTFS) { /* * Root mount; update timestamp in mount structure. * this will be used by the common root mount code * to update the system clock. */ mp->mnt_time = fs->fs_time; } if (ronly == 0) { fs->fs_mtime = time_second; if ((fs->fs_flags & FS_DOSOFTDEP) && (error = softdep_mount(devvp, mp, fs, cred)) != 0) { ffs_flushfiles(mp, FORCECLOSE, td); goto out; } if (fs->fs_snapinum[0] != 0) ffs_snapshot_mount(mp); fs->fs_fmod = 1; fs->fs_clean = 0; (void) ffs_sbupdate(ump, MNT_WAIT, 0); } /* * Initialize filesystem state information in mount struct. */ MNT_ILOCK(mp); mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_EXTENDED_SHARED | MNTK_NO_IOPF | MNTK_UNMAPPED_BUFS | MNTK_USES_BCACHE; MNT_IUNLOCK(mp); #ifdef UFS_EXTATTR #ifdef UFS_EXTATTR_AUTOSTART /* * * Auto-starting does the following: * - check for /.attribute in the fs, and extattr_start if so * - for each file in .attribute, enable that file with * an attribute of the same name. * Not clear how to report errors -- probably eat them. * This would all happen while the filesystem was busy/not * available, so would effectively be "atomic". */ (void) ufs_extattr_autostart(mp, td); #endif /* !UFS_EXTATTR_AUTOSTART */ #endif /* !UFS_EXTATTR */ return (0); out: if (fs != NULL) { free(fs->fs_csp, M_UFSMNT); free(fs->fs_si, M_UFSMNT); free(fs, M_UFSMNT); } if (cp != NULL) { g_topology_lock(); g_vfs_close(cp); g_topology_unlock(); } if (ump != NULL) { mtx_destroy(UFS_MTX(ump)); sx_destroy(&ump->um_checkpath_lock); if (mp->mnt_gjprovider != NULL) { free(mp->mnt_gjprovider, M_UFSMNT); mp->mnt_gjprovider = NULL; } MPASS(ump->um_softdep == NULL); free(ump, M_UFSMNT); mp->mnt_data = NULL; } BO_LOCK(&odevvp->v_bufobj); odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; BO_UNLOCK(&odevvp->v_bufobj); atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); mntfs_freevp(devvp); dev_rel(dev); return (error); } /* * A read function for use by filesystem-layer routines. */ static int ffs_use_bread(void *devfd, off_t loc, void **bufp, int size) { struct buf *bp; int error; KASSERT(*bufp == NULL, ("ffs_use_bread: non-NULL *bufp %p\n", *bufp)); *bufp = malloc(size, M_UFSMNT, M_WAITOK); if ((error = bread((struct vnode *)devfd, btodb(loc), size, NOCRED, &bp)) != 0) return (error); bcopy(bp->b_data, *bufp, size); bp->b_flags |= B_INVAL | B_NOCACHE; brelse(bp); return (0); } static int bigcgs = 0; SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); /* * Sanity checks for loading old filesystem superblocks. * See ffs_oldfscompat_write below for unwound actions. * * XXX - Parts get retired eventually. * Unfortunately new bits get added. */ static void ffs_oldfscompat_read(fs, ump, sblockloc) struct fs *fs; struct ufsmount *ump; ufs2_daddr_t sblockloc; { off_t maxfilesize; /* * If not yet done, update fs_flags location and value of fs_sblockloc. */ if ((fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { fs->fs_flags = fs->fs_old_flags; fs->fs_old_flags |= FS_FLAGS_UPDATED; fs->fs_sblockloc = sblockloc; } /* * If not yet done, update UFS1 superblock with new wider fields. */ if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_maxbsize != fs->fs_bsize) { fs->fs_maxbsize = fs->fs_bsize; fs->fs_time = fs->fs_old_time; fs->fs_size = fs->fs_old_size; fs->fs_dsize = fs->fs_old_dsize; fs->fs_csaddr = fs->fs_old_csaddr; fs->fs_cstotal.cs_ndir = fs->fs_old_cstotal.cs_ndir; fs->fs_cstotal.cs_nbfree = fs->fs_old_cstotal.cs_nbfree; fs->fs_cstotal.cs_nifree = fs->fs_old_cstotal.cs_nifree; fs->fs_cstotal.cs_nffree = fs->fs_old_cstotal.cs_nffree; } if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_old_inodefmt < FS_44INODEFMT) { fs->fs_maxfilesize = ((uint64_t)1 << 31) - 1; fs->fs_qbmask = ~fs->fs_bmask; fs->fs_qfmask = ~fs->fs_fmask; } if (fs->fs_magic == FS_UFS1_MAGIC) { ump->um_savedmaxfilesize = fs->fs_maxfilesize; maxfilesize = (uint64_t)0x80000000 * fs->fs_bsize - 1; if (fs->fs_maxfilesize > maxfilesize) fs->fs_maxfilesize = maxfilesize; } /* Compatibility for old filesystems */ if (fs->fs_avgfilesize <= 0) fs->fs_avgfilesize = AVFILESIZ; if (fs->fs_avgfpdir <= 0) fs->fs_avgfpdir = AFPDIR; if (bigcgs) { fs->fs_save_cgsize = fs->fs_cgsize; fs->fs_cgsize = fs->fs_bsize; } } /* * Unwinding superblock updates for old filesystems. * See ffs_oldfscompat_read above for details. * * XXX - Parts get retired eventually. * Unfortunately new bits get added. */ void ffs_oldfscompat_write(fs, ump) struct fs *fs; struct ufsmount *ump; { /* * Copy back UFS2 updated fields that UFS1 inspects. */ if (fs->fs_magic == FS_UFS1_MAGIC) { fs->fs_old_time = fs->fs_time; fs->fs_old_cstotal.cs_ndir = fs->fs_cstotal.cs_ndir; fs->fs_old_cstotal.cs_nbfree = fs->fs_cstotal.cs_nbfree; fs->fs_old_cstotal.cs_nifree = fs->fs_cstotal.cs_nifree; fs->fs_old_cstotal.cs_nffree = fs->fs_cstotal.cs_nffree; fs->fs_maxfilesize = ump->um_savedmaxfilesize; } if (bigcgs) { fs->fs_cgsize = fs->fs_save_cgsize; fs->fs_save_cgsize = 0; } } /* * unmount system call */ static int ffs_unmount(mp, mntflags) struct mount *mp; int mntflags; { struct thread *td; struct ufsmount *ump = VFSTOUFS(mp); struct fs *fs; int error, flags, susp; #ifdef UFS_EXTATTR int e_restart; #endif flags = 0; td = curthread; fs = ump->um_fs; if (mntflags & MNT_FORCE) flags |= FORCECLOSE; susp = fs->fs_ronly == 0; #ifdef UFS_EXTATTR if ((error = ufs_extattr_stop(mp, td))) { if (error != EOPNOTSUPP) printf("WARNING: unmount %s: ufs_extattr_stop " "returned errno %d\n", mp->mnt_stat.f_mntonname, error); e_restart = 0; } else { ufs_extattr_uepm_destroy(&ump->um_extattr); e_restart = 1; } #endif if (susp) { error = vfs_write_suspend_umnt(mp); if (error != 0) goto fail1; } if (MOUNTEDSOFTDEP(mp)) error = softdep_flushfiles(mp, flags, td); else error = ffs_flushfiles(mp, flags, td); if (error != 0 && !ffs_fsfail_cleanup(ump, error)) goto fail; UFS_LOCK(ump); if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("WARNING: unmount %s: pending error: blocks %jd " "files %d\n", fs->fs_fsmnt, (intmax_t)fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } UFS_UNLOCK(ump); if (MOUNTEDSOFTDEP(mp)) softdep_unmount(mp); MPASS(ump->um_softdep == NULL); if (fs->fs_ronly == 0) { fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; error = ffs_sbupdate(ump, MNT_WAIT, 0); if (ffs_fsfail_cleanup(ump, error)) error = 0; if (error != 0 && !ffs_fsfail_cleanup(ump, error)) { fs->fs_clean = 0; goto fail; } } if (susp) vfs_write_resume(mp, VR_START_WRITE); if (ump->um_trim_tq != NULL) { while (ump->um_trim_inflight != 0) pause("ufsutr", hz); taskqueue_drain_all(ump->um_trim_tq); taskqueue_free(ump->um_trim_tq); free (ump->um_trimhash, M_TRIM); } vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); g_topology_lock(); g_vfs_close(ump->um_cp); g_topology_unlock(); BO_LOCK(&ump->um_odevvp->v_bufobj); ump->um_odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS; BO_UNLOCK(&ump->um_odevvp->v_bufobj); atomic_store_rel_ptr((uintptr_t *)&ump->um_dev->si_mountpt, 0); mntfs_freevp(ump->um_devvp); vrele(ump->um_odevvp); dev_rel(ump->um_dev); mtx_destroy(UFS_MTX(ump)); sx_destroy(&ump->um_checkpath_lock); if (mp->mnt_gjprovider != NULL) { free(mp->mnt_gjprovider, M_UFSMNT); mp->mnt_gjprovider = NULL; } free(fs->fs_csp, M_UFSMNT); free(fs->fs_si, M_UFSMNT); free(fs, M_UFSMNT); free(ump, M_UFSMNT); mp->mnt_data = NULL; MNT_ILOCK(mp); mp->mnt_flag &= ~MNT_LOCAL; MNT_IUNLOCK(mp); if (td->td_su == mp) { td->td_su = NULL; vfs_rel(mp); } return (error); fail: if (susp) vfs_write_resume(mp, VR_START_WRITE); fail1: #ifdef UFS_EXTATTR if (e_restart) { ufs_extattr_uepm_init(&ump->um_extattr); #ifdef UFS_EXTATTR_AUTOSTART (void) ufs_extattr_autostart(mp, td); #endif } #endif return (error); } /* * Flush out all the files in a filesystem. */ int ffs_flushfiles(mp, flags, td) struct mount *mp; int flags; struct thread *td; { struct ufsmount *ump; int qerror, error; ump = VFSTOUFS(mp); qerror = 0; #ifdef QUOTA if (mp->mnt_flag & MNT_QUOTA) { int i; error = vflush(mp, 0, SKIPSYSTEM|flags, td); if (error) return (error); for (i = 0; i < MAXQUOTAS; i++) { error = quotaoff(td, mp, i); if (error != 0) { if ((flags & EARLYFLUSH) == 0) return (error); else qerror = error; } } /* * Here we fall through to vflush again to ensure that * we have gotten rid of all the system vnodes, unless * quotas must not be closed. */ } #endif /* devvp is not locked there */ if (ump->um_devvp->v_vflag & VV_COPYONWRITE) { if ((error = vflush(mp, 0, SKIPSYSTEM | flags, td)) != 0) return (error); ffs_snapshot_unmount(mp); flags |= FORCECLOSE; /* * Here we fall through to vflush again to ensure * that we have gotten rid of all the system vnodes. */ } /* * Do not close system files if quotas were not closed, to be * able to sync the remaining dquots. The freeblks softupdate * workitems might hold a reference on a dquot, preventing * quotaoff() from completing. Next round of * softdep_flushworklist() iteration should process the * blockers, allowing the next run of quotaoff() to finally * flush held dquots. * * Otherwise, flush all the files. */ if (qerror == 0 && (error = vflush(mp, 0, flags, td)) != 0) return (error); /* * Flush filesystem metadata. */ vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td); VOP_UNLOCK(ump->um_devvp); return (error); } /* * Get filesystem statistics. */ static int ffs_statfs(mp, sbp) struct mount *mp; struct statfs *sbp; { struct ufsmount *ump; struct fs *fs; ump = VFSTOUFS(mp); fs = ump->um_fs; if (fs->fs_magic != FS_UFS1_MAGIC && fs->fs_magic != FS_UFS2_MAGIC) panic("ffs_statfs"); sbp->f_version = STATFS_VERSION; sbp->f_bsize = fs->fs_fsize; sbp->f_iosize = fs->fs_bsize; sbp->f_blocks = fs->fs_dsize; UFS_LOCK(ump); sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag + fs->fs_cstotal.cs_nffree + dbtofsb(fs, fs->fs_pendingblocks); sbp->f_bavail = freespace(fs, fs->fs_minfree) + dbtofsb(fs, fs->fs_pendingblocks); sbp->f_files = fs->fs_ncg * fs->fs_ipg - UFS_ROOTINO; sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; UFS_UNLOCK(ump); sbp->f_namemax = UFS_MAXNAMLEN; return (0); } static bool sync_doupdate(struct inode *ip) { return ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) != 0); } static int ffs_sync_lazy_filter(struct vnode *vp, void *arg __unused) { struct inode *ip; /* * Flags are safe to access because ->v_data invalidation * is held off by listmtx. */ if (vp->v_type == VNON) return (false); ip = VTOI(vp); if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) return (false); return (true); } /* * For a lazy sync, we only care about access times, quotas and the * superblock. Other filesystem changes are already converted to * cylinder group blocks or inode blocks updates and are written to * disk by syncer. */ static int ffs_sync_lazy(mp) struct mount *mp; { struct vnode *mvp, *vp; struct inode *ip; int allerror, error; allerror = 0; if ((mp->mnt_flag & MNT_NOATIME) != 0) { #ifdef QUOTA qsync(mp); #endif goto sbupdate; } MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, ffs_sync_lazy_filter, NULL) { if (vp->v_type == VNON) { VI_UNLOCK(vp); continue; } ip = VTOI(vp); /* * The IN_ACCESS flag is converted to IN_MODIFIED by * ufs_close() and ufs_getattr() by the calls to * ufs_itimes_locked(), without subsequent UFS_UPDATE(). * Test also all the other timestamp flags too, to pick up * any other cases that could be missed. */ if (!sync_doupdate(ip) && (vp->v_iflag & VI_OWEINACT) == 0) { VI_UNLOCK(vp); continue; } if ((error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK)) != 0) continue; #ifdef QUOTA qsyncvp(vp); #endif if (sync_doupdate(ip)) error = ffs_update(vp, 0); if (error != 0) allerror = error; vput(vp); } sbupdate: if (VFSTOUFS(mp)->um_fs->fs_fmod != 0 && (error = ffs_sbupdate(VFSTOUFS(mp), MNT_LAZY, 0)) != 0) allerror = error; return (allerror); } /* * Go through the disk queues to initiate sandbagged IO; * go through the inodes to write those that have been modified; * initiate the writing of the super block if it has been modified. * * Note: we are always called with the filesystem marked busy using * vfs_busy(). */ static int ffs_sync(mp, waitfor) struct mount *mp; int waitfor; { struct vnode *mvp, *vp, *devvp; struct thread *td; struct inode *ip; struct ufsmount *ump = VFSTOUFS(mp); struct fs *fs; int error, count, lockreq, allerror = 0; int suspend; int suspended; int secondary_writes; int secondary_accwrites; int softdep_deps; int softdep_accdeps; struct bufobj *bo; suspend = 0; suspended = 0; td = curthread; fs = ump->um_fs; if (fs->fs_fmod != 0 && fs->fs_ronly != 0) panic("%s: ffs_sync: modification on read-only filesystem", fs->fs_fsmnt); if (waitfor == MNT_LAZY) { if (!rebooting) return (ffs_sync_lazy(mp)); waitfor = MNT_NOWAIT; } /* * Write back each (modified) inode. */ lockreq = LK_EXCLUSIVE | LK_NOWAIT; if (waitfor == MNT_SUSPEND) { suspend = 1; waitfor = MNT_WAIT; } if (waitfor == MNT_WAIT) lockreq = LK_EXCLUSIVE; lockreq |= LK_INTERLOCK | LK_SLEEPFAIL; loop: /* Grab snapshot of secondary write counts */ MNT_ILOCK(mp); secondary_writes = mp->mnt_secondary_writes; secondary_accwrites = mp->mnt_secondary_accwrites; MNT_IUNLOCK(mp); /* Grab snapshot of softdep dependency counts */ softdep_get_depcounts(mp, &softdep_deps, &softdep_accdeps); MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { /* * Depend on the vnode interlock to keep things stable enough * for a quick test. Since there might be hundreds of * thousands of vnodes, we cannot afford even a subroutine * call unless there's a good chance that we have work to do. */ if (vp->v_type == VNON) { VI_UNLOCK(vp); continue; } ip = VTOI(vp); if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && vp->v_bufobj.bo_dirty.bv_cnt == 0) { VI_UNLOCK(vp); continue; } if ((error = vget(vp, lockreq)) != 0) { if (error == ENOENT || error == ENOLCK) { MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); goto loop; } continue; } #ifdef QUOTA qsyncvp(vp); #endif for (;;) { error = ffs_syncvnode(vp, waitfor, 0); if (error == ERELOOKUP) continue; if (error != 0) allerror = error; break; } vput(vp); } /* * Force stale filesystem control information to be flushed. */ if (waitfor == MNT_WAIT || rebooting) { if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) allerror = error; if (ffs_fsfail_cleanup(ump, allerror)) allerror = 0; /* Flushed work items may create new vnodes to clean */ if (allerror == 0 && count) goto loop; } devvp = ump->um_devvp; bo = &devvp->v_bufobj; BO_LOCK(bo); if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) { BO_UNLOCK(bo); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_FSYNC(devvp, waitfor, td); VOP_UNLOCK(devvp); if (MOUNTEDSOFTDEP(mp) && (error == 0 || error == EAGAIN)) error = ffs_sbupdate(ump, waitfor, 0); if (error != 0) allerror = error; if (ffs_fsfail_cleanup(ump, allerror)) allerror = 0; if (allerror == 0 && waitfor == MNT_WAIT) goto loop; } else if (suspend != 0) { if (softdep_check_suspend(mp, devvp, softdep_deps, softdep_accdeps, secondary_writes, secondary_accwrites) != 0) { MNT_IUNLOCK(mp); goto loop; /* More work needed */ } mtx_assert(MNT_MTX(mp), MA_OWNED); mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED; MNT_IUNLOCK(mp); suspended = 1; } else BO_UNLOCK(bo); /* * Write back modified superblock. */ if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor, suspended)) != 0) allerror = error; if (ffs_fsfail_cleanup(ump, allerror)) allerror = 0; return (allerror); } int ffs_vget(mp, ino, flags, vpp) struct mount *mp; ino_t ino; int flags; struct vnode **vpp; { return (ffs_vgetf(mp, ino, flags, vpp, 0)); } int ffs_vgetf(mp, ino, flags, vpp, ffs_flags) struct mount *mp; ino_t ino; int flags; struct vnode **vpp; int ffs_flags; { struct fs *fs; struct inode *ip; struct ufsmount *ump; struct buf *bp; struct vnode *vp; daddr_t dbn; int error; MPASS((ffs_flags & (FFSV_REPLACE | FFSV_REPLACE_DOOMED)) == 0 || (flags & LK_EXCLUSIVE) != 0); error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL); if (error != 0) return (error); if (*vpp != NULL) { if ((ffs_flags & FFSV_REPLACE) == 0 || ((ffs_flags & FFSV_REPLACE_DOOMED) == 0 || !VN_IS_DOOMED(*vpp))) return (0); vgone(*vpp); vput(*vpp); } /* * We must promote to an exclusive lock for vnode creation. This * can happen if lookup is passed LOCKSHARED. */ if ((flags & LK_TYPE_MASK) == LK_SHARED) { flags &= ~LK_TYPE_MASK; flags |= LK_EXCLUSIVE; } /* * We do not lock vnode creation as it is believed to be too * expensive for such rare case as simultaneous creation of vnode * for same ino by different processes. We just allow them to race * and check later to decide who wins. Let the race begin! */ ump = VFSTOUFS(mp); fs = ump->um_fs; ip = uma_zalloc_smr(uma_inode, M_WAITOK | M_ZERO); /* Allocate a new vnode/inode. */ error = getnewvnode("ufs", mp, fs->fs_magic == FS_UFS1_MAGIC ? &ffs_vnodeops1 : &ffs_vnodeops2, &vp); if (error) { *vpp = NULL; uma_zfree_smr(uma_inode, ip); return (error); } /* * FFS supports recursive locking. */ lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL); VN_LOCK_AREC(vp); vp->v_data = ip; vp->v_bufobj.bo_bsize = fs->fs_bsize; ip->i_vnode = vp; ip->i_ump = ump; ip->i_number = ino; ip->i_ea_refs = 0; ip->i_nextclustercg = -1; ip->i_flag = fs->fs_magic == FS_UFS1_MAGIC ? 0 : IN_UFS2; ip->i_mode = 0; /* ensure error cases below throw away vnode */ cluster_init_vn(&ip->i_clusterw); #ifdef DIAGNOSTIC ufs_init_trackers(ip); #endif #ifdef QUOTA { int i; for (i = 0; i < MAXQUOTAS; i++) ip->i_dquot[i] = NODQUOT; } #endif if (ffs_flags & FFSV_FORCEINSMQ) vp->v_vflag |= VV_FORCEINSMQ; error = insmntque(vp, mp); if (error != 0) { uma_zfree_smr(uma_inode, ip); *vpp = NULL; return (error); } vp->v_vflag &= ~VV_FORCEINSMQ; error = vfs_hash_insert(vp, ino, flags, curthread, vpp, NULL, NULL); if (error != 0) return (error); if (*vpp != NULL) { /* * Calls from ffs_valloc() (i.e. FFSV_REPLACE set) * operate on empty inode, which must not be found by * other threads until fully filled. Vnode for empty * inode must be not re-inserted on the hash by other * thread, after removal by us at the beginning. */ MPASS((ffs_flags & FFSV_REPLACE) == 0); return (0); } /* Read in the disk contents for the inode, copy into the inode. */ dbn = fsbtodb(fs, ino_to_fsba(fs, ino)); error = ffs_breadz(ump, ump->um_devvp, dbn, dbn, (int)fs->fs_bsize, NULL, NULL, 0, NOCRED, 0, NULL, &bp); if (error != 0) { /* * The inode does not contain anything useful, so it would * be misleading to leave it on its hash chain. With mode * still zero, it will be unlinked and returned to the free * list by vput(). */ vgone(vp); vput(vp); *vpp = NULL; return (error); } if (I_IS_UFS1(ip)) ip->i_din1 = uma_zalloc(uma_ufs1, M_WAITOK); else ip->i_din2 = uma_zalloc(uma_ufs2, M_WAITOK); if ((error = ffs_load_inode(bp, ip, fs, ino)) != 0) { bqrelse(bp); vgone(vp); vput(vp); *vpp = NULL; return (error); } if (DOINGSOFTDEP(vp) && (!fs->fs_ronly || (ffs_flags & FFSV_FORCEINODEDEP) != 0)) softdep_load_inodeblock(ip); else ip->i_effnlink = ip->i_nlink; bqrelse(bp); /* * Initialize the vnode from the inode, check for aliases. * Note that the underlying vnode may have changed. */ error = ufs_vinit(mp, I_IS_UFS1(ip) ? &ffs_fifoops1 : &ffs_fifoops2, &vp); if (error) { vgone(vp); vput(vp); *vpp = NULL; return (error); } /* * Finish inode initialization. */ if (vp->v_type != VFIFO) { /* FFS supports shared locking for all files except fifos. */ VN_LOCK_ASHARE(vp); } /* * Set up a generation number for this inode if it does not * already have one. This should only happen on old filesystems. */ if (ip->i_gen == 0) { while (ip->i_gen == 0) ip->i_gen = arc4random(); if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { UFS_INODE_SET_FLAG(ip, IN_MODIFIED); DIP_SET(ip, i_gen, ip->i_gen); } } #ifdef MAC if ((mp->mnt_flag & MNT_MULTILABEL) && ip->i_mode) { /* * If this vnode is already allocated, and we're running * multi-label, attempt to perform a label association * from the extended attributes on the inode. */ error = mac_vnode_associate_extattr(mp, vp); if (error) { /* ufs_inactive will release ip->i_devvp ref. */ vgone(vp); vput(vp); *vpp = NULL; return (error); } } #endif *vpp = vp; return (0); } /* * File handle to vnode * * Have to be really careful about stale file handles: * - check that the inode number is valid * - for UFS2 check that the inode number is initialized * - call ffs_vget() to get the locked inode * - check for an unallocated inode (i_mode == 0) * - check that the given client host has export rights and return * those rights via. exflagsp and credanonp */ static int ffs_fhtovp(mp, fhp, flags, vpp) struct mount *mp; struct fid *fhp; int flags; struct vnode **vpp; { struct ufid *ufhp; ufhp = (struct ufid *)fhp; return (ffs_inotovp(mp, ufhp->ufid_ino, ufhp->ufid_gen, flags, vpp, 0)); } int ffs_inotovp(mp, ino, gen, lflags, vpp, ffs_flags) struct mount *mp; ino_t ino; u_int64_t gen; int lflags; struct vnode **vpp; int ffs_flags; { struct ufsmount *ump; struct vnode *nvp; struct inode *ip; struct fs *fs; struct cg *cgp; struct buf *bp; u_int cg; int error; ump = VFSTOUFS(mp); fs = ump->um_fs; *vpp = NULL; if (ino < UFS_ROOTINO || ino >= fs->fs_ncg * fs->fs_ipg) return (ESTALE); /* * Need to check if inode is initialized because UFS2 does lazy * initialization and nfs_fhtovp can offer arbitrary inode numbers. */ if (fs->fs_magic == FS_UFS2_MAGIC) { cg = ino_to_cg(fs, ino); error = ffs_getcg(fs, ump->um_devvp, cg, 0, &bp, &cgp); if (error != 0) return (error); if (ino >= cg * fs->fs_ipg + cgp->cg_initediblk) { brelse(bp); return (ESTALE); } brelse(bp); } error = ffs_vgetf(mp, ino, lflags, &nvp, ffs_flags); if (error != 0) return (error); ip = VTOI(nvp); if (ip->i_mode == 0 || ip->i_gen != gen || ip->i_effnlink <= 0) { if (ip->i_mode == 0) vgone(nvp); vput(nvp); return (ESTALE); } vnode_create_vobject(nvp, DIP(ip, i_size), curthread); *vpp = nvp; return (0); } /* * Initialize the filesystem. */ static int ffs_init(vfsp) struct vfsconf *vfsp; { ffs_susp_initialize(); softdep_initialize(); return (ufs_init(vfsp)); } /* * Undo the work of ffs_init(). */ static int ffs_uninit(vfsp) struct vfsconf *vfsp; { int ret; ret = ufs_uninit(vfsp); softdep_uninitialize(); ffs_susp_uninitialize(); taskqueue_drain_all(taskqueue_thread); return (ret); } /* * Structure used to pass information from ffs_sbupdate to its * helper routine ffs_use_bwrite. */ struct devfd { struct ufsmount *ump; struct buf *sbbp; int waitfor; int suspended; int error; }; /* * Write a superblock and associated information back to disk. */ int ffs_sbupdate(ump, waitfor, suspended) struct ufsmount *ump; int waitfor; int suspended; { struct fs *fs; struct buf *sbbp; struct devfd devfd; fs = ump->um_fs; if (fs->fs_ronly == 1 && (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) != (MNT_RDONLY | MNT_UPDATE)) panic("ffs_sbupdate: write read-only filesystem"); /* * We use the superblock's buf to serialize calls to ffs_sbupdate(). */ sbbp = getblk(ump->um_devvp, btodb(fs->fs_sblockloc), (int)fs->fs_sbsize, 0, 0, 0); /* * Initialize info needed for write function. */ devfd.ump = ump; devfd.sbbp = sbbp; devfd.waitfor = waitfor; devfd.suspended = suspended; devfd.error = 0; return (ffs_sbput(&devfd, fs, fs->fs_sblockloc, ffs_use_bwrite)); } /* * Write function for use by filesystem-layer routines. */ static int ffs_use_bwrite(void *devfd, off_t loc, void *buf, int size) { struct devfd *devfdp; struct ufsmount *ump; struct buf *bp; struct fs *fs; int error; devfdp = devfd; ump = devfdp->ump; fs = ump->um_fs; /* * Writing the superblock summary information. */ if (loc != fs->fs_sblockloc) { bp = getblk(ump->um_devvp, btodb(loc), size, 0, 0, 0); bcopy(buf, bp->b_data, (u_int)size); if (devfdp->suspended) bp->b_flags |= B_VALIDSUSPWRT; if (devfdp->waitfor != MNT_WAIT) bawrite(bp); else if ((error = bwrite(bp)) != 0) devfdp->error = error; return (0); } /* * Writing the superblock itself. We need to do special checks for it. */ bp = devfdp->sbbp; if (ffs_fsfail_cleanup(ump, devfdp->error)) devfdp->error = 0; if (devfdp->error != 0) { brelse(bp); return (devfdp->error); } if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_sblockloc != SBLOCK_UFS1 && (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS1); fs->fs_sblockloc = SBLOCK_UFS1; } if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_sblockloc != SBLOCK_UFS2 && (fs->fs_old_flags & FS_FLAGS_UPDATED) == 0) { printf("WARNING: %s: correcting fs_sblockloc from %jd to %d\n", fs->fs_fsmnt, fs->fs_sblockloc, SBLOCK_UFS2); fs->fs_sblockloc = SBLOCK_UFS2; } if (MOUNTEDSOFTDEP(ump->um_mountp)) softdep_setup_sbupdate(ump, (struct fs *)bp->b_data, bp); bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); fs = (struct fs *)bp->b_data; ffs_oldfscompat_write(fs, ump); fs->fs_si = NULL; /* Recalculate the superblock hash */ fs->fs_ckhash = ffs_calc_sbhash(fs); if (devfdp->suspended) bp->b_flags |= B_VALIDSUSPWRT; if (devfdp->waitfor != MNT_WAIT) bawrite(bp); else if ((error = bwrite(bp)) != 0) devfdp->error = error; return (devfdp->error); } static int ffs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp, int attrnamespace, const char *attrname) { #ifdef UFS_EXTATTR return (ufs_extattrctl(mp, cmd, filename_vp, attrnamespace, attrname)); #else return (vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname)); #endif } static void ffs_ifree(struct ufsmount *ump, struct inode *ip) { if (ump->um_fstype == UFS1 && ip->i_din1 != NULL) uma_zfree(uma_ufs1, ip->i_din1); else if (ip->i_din2 != NULL) uma_zfree(uma_ufs2, ip->i_din2); uma_zfree_smr(uma_inode, ip); } static int dobkgrdwrite = 1; SYSCTL_INT(_debug, OID_AUTO, dobkgrdwrite, CTLFLAG_RW, &dobkgrdwrite, 0, "Do background writes (honoring the BV_BKGRDWRITE flag)?"); /* * Complete a background write started from bwrite. */ static void ffs_backgroundwritedone(struct buf *bp) { struct bufobj *bufobj; struct buf *origbp; #ifdef SOFTUPDATES if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) != 0) softdep_handle_error(bp); #endif /* * Find the original buffer that we are writing. */ bufobj = bp->b_bufobj; BO_LOCK(bufobj); if ((origbp = gbincore(bp->b_bufobj, bp->b_lblkno)) == NULL) panic("backgroundwritedone: lost buffer"); /* * We should mark the cylinder group buffer origbp as * dirty, to not lose the failed write. */ if ((bp->b_ioflags & BIO_ERROR) != 0) origbp->b_vflags |= BV_BKGRDERR; BO_UNLOCK(bufobj); /* * Process dependencies then return any unfinished ones. */ if (!LIST_EMPTY(&bp->b_dep) && (bp->b_ioflags & BIO_ERROR) == 0) buf_complete(bp); #ifdef SOFTUPDATES if (!LIST_EMPTY(&bp->b_dep)) softdep_move_dependencies(bp, origbp); #endif /* * This buffer is marked B_NOCACHE so when it is released * by biodone it will be tossed. Clear B_IOSTARTED in case of error. */ bp->b_flags |= B_NOCACHE; bp->b_flags &= ~(B_CACHE | B_IOSTARTED); pbrelvp(bp); /* * Prevent brelse() from trying to keep and re-dirtying bp on * errors. It causes b_bufobj dereference in * bdirty()/reassignbuf(), and b_bufobj was cleared in * pbrelvp() above. */ if ((bp->b_ioflags & BIO_ERROR) != 0) bp->b_flags |= B_INVAL; bufdone(bp); BO_LOCK(bufobj); /* * Clear the BV_BKGRDINPROG flag in the original buffer * and awaken it if it is waiting for the write to complete. * If BV_BKGRDINPROG is not set in the original buffer it must * have been released and re-instantiated - which is not legal. */ KASSERT((origbp->b_vflags & BV_BKGRDINPROG), ("backgroundwritedone: lost buffer2")); origbp->b_vflags &= ~BV_BKGRDINPROG; if (origbp->b_vflags & BV_BKGRDWAIT) { origbp->b_vflags &= ~BV_BKGRDWAIT; wakeup(&origbp->b_xflags); } BO_UNLOCK(bufobj); } /* * Write, release buffer on completion. (Done by iodone * if async). Do not bother writing anything if the buffer * is invalid. * * Note that we set B_CACHE here, indicating that buffer is * fully valid and thus cacheable. This is true even of NFS * now so we set it generally. This could be set either here * or in biodone() since the I/O is synchronous. We put it * here. */ static int ffs_bufwrite(struct buf *bp) { struct buf *newbp; struct cg *cgp; CTR3(KTR_BUF, "bufwrite(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); if (bp->b_flags & B_INVAL) { brelse(bp); return (0); } if (!BUF_ISLOCKED(bp)) panic("bufwrite: buffer is not busy???"); /* * If a background write is already in progress, delay * writing this block if it is asynchronous. Otherwise * wait for the background write to complete. */ BO_LOCK(bp->b_bufobj); if (bp->b_vflags & BV_BKGRDINPROG) { if (bp->b_flags & B_ASYNC) { BO_UNLOCK(bp->b_bufobj); bdwrite(bp); return (0); } bp->b_vflags |= BV_BKGRDWAIT; msleep(&bp->b_xflags, BO_LOCKPTR(bp->b_bufobj), PRIBIO, "bwrbg", 0); if (bp->b_vflags & BV_BKGRDINPROG) panic("bufwrite: still writing"); } bp->b_vflags &= ~BV_BKGRDERR; BO_UNLOCK(bp->b_bufobj); /* * If this buffer is marked for background writing and we * do not have to wait for it, make a copy and write the * copy so as to leave this buffer ready for further use. * * This optimization eats a lot of memory. If we have a page * or buffer shortfall we can't do it. */ if (dobkgrdwrite && (bp->b_xflags & BX_BKGRDWRITE) && (bp->b_flags & B_ASYNC) && !vm_page_count_severe() && !buf_dirty_count_severe()) { KASSERT(bp->b_iodone == NULL, ("bufwrite: needs chained iodone (%p)", bp->b_iodone)); /* get a new block */ newbp = geteblk(bp->b_bufsize, GB_NOWAIT_BD); if (newbp == NULL) goto normal_write; KASSERT(buf_mapped(bp), ("Unmapped cg")); memcpy(newbp->b_data, bp->b_data, bp->b_bufsize); BO_LOCK(bp->b_bufobj); bp->b_vflags |= BV_BKGRDINPROG; BO_UNLOCK(bp->b_bufobj); newbp->b_xflags |= (bp->b_xflags & BX_FSPRIV) | BX_BKGRDMARKER; newbp->b_lblkno = bp->b_lblkno; newbp->b_blkno = bp->b_blkno; newbp->b_offset = bp->b_offset; newbp->b_iodone = ffs_backgroundwritedone; newbp->b_flags |= B_ASYNC; newbp->b_flags &= ~B_INVAL; pbgetvp(bp->b_vp, newbp); #ifdef SOFTUPDATES /* * Move over the dependencies. If there are rollbacks, * leave the parent buffer dirtied as it will need to * be written again. */ if (LIST_EMPTY(&bp->b_dep) || softdep_move_dependencies(bp, newbp) == 0) bundirty(bp); #else bundirty(bp); #endif /* * Initiate write on the copy, release the original. The * BKGRDINPROG flag prevents it from going away until * the background write completes. We have to recalculate * its check hash in case the buffer gets freed and then * reconstituted from the buffer cache during a later read. */ if ((bp->b_xflags & BX_CYLGRP) != 0) { cgp = (struct cg *)bp->b_data; cgp->cg_ckhash = 0; cgp->cg_ckhash = calculate_crc32c(~0L, bp->b_data, bp->b_bcount); } bqrelse(bp); bp = newbp; } else /* Mark the buffer clean */ bundirty(bp); /* Let the normal bufwrite do the rest for us */ normal_write: /* * If we are writing a cylinder group, update its time. */ if ((bp->b_xflags & BX_CYLGRP) != 0) { cgp = (struct cg *)bp->b_data; cgp->cg_old_time = cgp->cg_time = time_second; } return (bufwrite(bp)); } static void ffs_geom_strategy(struct bufobj *bo, struct buf *bp) { struct vnode *vp; struct buf *tbp; int error, nocopy; /* * This is the bufobj strategy for the private VCHR vnodes * used by FFS to access the underlying storage device. * We override the default bufobj strategy and thus bypass * VOP_STRATEGY() for these vnodes. */ vp = bo2vnode(bo); KASSERT(bp->b_vp == NULL || bp->b_vp->v_type != VCHR || bp->b_vp->v_rdev == NULL || bp->b_vp->v_rdev->si_mountpt == NULL || VFSTOUFS(bp->b_vp->v_rdev->si_mountpt) == NULL || vp == VFSTOUFS(bp->b_vp->v_rdev->si_mountpt)->um_devvp, ("ffs_geom_strategy() with wrong vp")); if (bp->b_iocmd == BIO_WRITE) { if ((bp->b_flags & B_VALIDSUSPWRT) == 0 && bp->b_vp != NULL && bp->b_vp->v_mount != NULL && (bp->b_vp->v_mount->mnt_kern_flag & MNTK_SUSPENDED) != 0) panic("ffs_geom_strategy: bad I/O"); nocopy = bp->b_flags & B_NOCOPY; bp->b_flags &= ~(B_VALIDSUSPWRT | B_NOCOPY); if ((vp->v_vflag & VV_COPYONWRITE) && nocopy == 0 && vp->v_rdev->si_snapdata != NULL) { if ((bp->b_flags & B_CLUSTER) != 0) { runningbufwakeup(bp); TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, b_cluster.cluster_entry) { error = ffs_copyonwrite(vp, tbp); if (error != 0 && error != EOPNOTSUPP) { bp->b_error = error; bp->b_ioflags |= BIO_ERROR; bp->b_flags &= ~B_BARRIER; bufdone(bp); return; } } bp->b_runningbufspace = bp->b_bufsize; atomic_add_long(&runningbufspace, bp->b_runningbufspace); } else { error = ffs_copyonwrite(vp, bp); if (error != 0 && error != EOPNOTSUPP) { bp->b_error = error; bp->b_ioflags |= BIO_ERROR; bp->b_flags &= ~B_BARRIER; bufdone(bp); return; } } } #ifdef SOFTUPDATES if ((bp->b_flags & B_CLUSTER) != 0) { TAILQ_FOREACH(tbp, &bp->b_cluster.cluster_head, b_cluster.cluster_entry) { if (!LIST_EMPTY(&tbp->b_dep)) buf_start(tbp); } } else { if (!LIST_EMPTY(&bp->b_dep)) buf_start(bp); } #endif /* * Check for metadata that needs check-hashes and update them. */ switch (bp->b_xflags & BX_FSPRIV) { case BX_CYLGRP: ((struct cg *)bp->b_data)->cg_ckhash = 0; ((struct cg *)bp->b_data)->cg_ckhash = calculate_crc32c(~0L, bp->b_data, bp->b_bcount); break; case BX_SUPERBLOCK: case BX_INODE: case BX_INDIR: case BX_DIR: printf("Check-hash write is unimplemented!!!\n"); break; case 0: break; default: printf("multiple buffer types 0x%b\n", (u_int)(bp->b_xflags & BX_FSPRIV), PRINT_UFS_BUF_XFLAGS); break; } } if (bp->b_iocmd != BIO_READ && ffs_enxio_enable) bp->b_xflags |= BX_CVTENXIO; g_vfs_strategy(bo, bp); } int ffs_own_mount(const struct mount *mp) { if (mp->mnt_op == &ufs_vfsops) return (1); return (0); } #ifdef DDB #ifdef SOFTUPDATES /* defined in ffs_softdep.c */ extern void db_print_ffs(struct ufsmount *ump); DB_SHOW_COMMAND(ffs, db_show_ffs) { struct mount *mp; struct ufsmount *ump; if (have_addr) { ump = VFSTOUFS((struct mount *)addr); db_print_ffs(ump); return; } TAILQ_FOREACH(mp, &mountlist, mnt_list) { if (!strcmp(mp->mnt_stat.f_fstypename, ufs_vfsconf.vfc_name)) db_print_ffs(VFSTOUFS(mp)); } } #endif /* SOFTUPDATES */ #endif /* DDB */