/* * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 * $FreeBSD$ */ #include "opt_quota.h" #include "opt_ufs.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part"); static int ffs_sbupdate(struct ufsmount *, int); int ffs_reload(struct mount *,struct ucred *,struct thread *); static int ffs_oldfscompat(struct fs *); static int ffs_init(struct vfsconf *); static struct vfsops ufs_vfsops = { ffs_mount, ufs_start, ffs_unmount, ufs_root, ufs_quotactl, ffs_statfs, ffs_sync, ffs_vget, ffs_fhtovp, vfs_stdcheckexp, ffs_vptofh, ffs_init, vfs_stduninit, #ifdef UFS_EXTATTR ufs_extattrctl, #else vfs_stdextattrctl, #endif }; VFS_SET(ufs_vfsops, ufs, 0); /* * ffs_mount * * Called when mounting local physical media * * PARAMETERS: * mountroot * mp mount point structure * path NULL (flag for root mount!!!) * data * ndp * p process (user credentials check [statfs]) * * mount * mp mount point structure * path path to mount point * data pointer to argument struct in user space * ndp mount point namei() return (used for * credentials on reload), reused to look * up block device. * p process (user credentials check) * * RETURNS: 0 Success * !0 error number (errno.h) * * LOCK STATE: * * ENTRY * mount point is locked * EXIT * mount point is locked * * NOTES: * A NULL path can be used for a flag since the mount * system call will fail with EFAULT in copyinstr in * namei() if it is a genuine NULL from the user. */ int ffs_mount(mp, path, data, ndp, td) struct mount *mp; /* mount struct pointer*/ char *path; /* path to mount point*/ caddr_t data; /* arguments to FS specific mount*/ struct nameidata *ndp; /* mount point credentials*/ struct thread *td; /* process requesting mount*/ { size_t size; struct vnode *devvp; struct ufs_args args; struct ufsmount *ump = 0; struct fs *fs; int error, flags; mode_t accessmode; /* * Use NULL path to indicate we are mounting the root filesystem. */ if (path == NULL) { if ((error = bdevvp(rootdev, &rootvp))) { printf("ffs_mountroot: can't find rootvp\n"); return (error); } if ((error = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) return (error); (void)VFS_STATFS(mp, &mp->mnt_stat, td); return (0); } /* * Mounting non-root filesystem or updating a filesystem */ if ((error = copyin(data, (caddr_t)&args, sizeof(struct ufs_args)))!= 0) return (error); /* * 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; devvp = ump->um_devvp; if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) return (error); /* * Flush any dirty data. */ VFS_SYNC(mp, MNT_WAIT, td->td_proc->p_ucred, td); /* * Check for and optionally get rid of files open * for writing. */ flags = WRITECLOSE; if (mp->mnt_flag & MNT_FORCE) flags |= FORCECLOSE; if (mp->mnt_flag & MNT_SOFTDEP) { error = softdep_flushfiles(mp, flags, td); } else { error = ffs_flushfiles(mp, flags, td); } if (error) { vn_finished_write(mp); return (error); } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("%s: update error: blocks %d files %d\n", fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } fs->fs_ronly = 1; if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) fs->fs_clean = 1; if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { fs->fs_ronly = 0; fs->fs_clean = 0; vn_finished_write(mp); return (error); } vn_finished_write(mp); } if ((mp->mnt_flag & MNT_RELOAD) && (error = ffs_reload(mp, ndp->ni_cnd.cn_cred, td)) != 0) return (error); if (fs->fs_ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { /* * If upgrade to read-write by non-root, then verify * that user has necessary permissions on the device. */ if (suser(td)) { vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); if ((error = VOP_ACCESS(devvp, VREAD | VWRITE, td->td_ucred, td)) != 0) { VOP_UNLOCK(devvp, 0, td); return (error); } VOP_UNLOCK(devvp, 0, td); } 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_NEEDSFSCK) == 0 && (fs->fs_flags & FS_DOSOFTDEP))) { printf("WARNING: %s was not %s\n", fs->fs_fsmnt, "properly dismounted"); } else { printf( "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", fs->fs_fsmnt); return (EPERM); } } if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0) return (error); fs->fs_ronly = 0; fs->fs_clean = 0; if ((error = ffs_sbupdate(ump, MNT_WAIT)) != 0) { vn_finished_write(mp); return (error); } /* check to see if we need to start softdep */ if ((fs->fs_flags & FS_DOSOFTDEP) && (error = softdep_mount(devvp, mp, fs, td->td_ucred))){ vn_finished_write(mp); return (error); } if (fs->fs_snapinum[0] != 0) ffs_snapshot_mount(mp); vn_finished_write(mp); } /* * 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 (mp->mnt_flag & MNT_SOFTDEP) mp->mnt_flag &= ~MNT_ASYNC; /* * If not updating name, process export requests. */ if (args.fspec == 0) return (vfs_export(mp, &args.export)); /* * If this is a snapshot request, take the snapshot. */ if (mp->mnt_flag & MNT_SNAPSHOT) return (ffs_snapshot(mp, args.fspec)); } /* * Not an update, or updating the name: look up the name * and verify that it refers to a sensible block device. */ NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td); if ((error = namei(ndp)) != 0) return (error); NDFREE(ndp, NDF_ONLY_PNBUF); devvp = ndp->ni_vp; if (!vn_isdisk(devvp, &error)) { vrele(devvp); return (error); } /* * If mount by non-root, then verify that user has necessary * permissions on the device. */ if (suser(td)) { accessmode = VREAD; if ((mp->mnt_flag & MNT_RDONLY) == 0) accessmode |= VWRITE; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); if ((error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td))!= 0){ vput(devvp); return (error); } VOP_UNLOCK(devvp, 0, td); } 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 != ump->um_devvp && devvp->v_rdev != ump->um_devvp->v_rdev) error = EINVAL; /* needs translation */ vrele(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() populates f_mntonname for us. */ if ((error = ffs_mountfs(devvp, mp, td, M_FFSNODE)) != 0) { vrele(devvp); return (error); } } /* * Save "mounted from" device name info for mount point (NULL pad). */ copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); /* * Initialize filesystem stat information in mount struct. */ (void)VFS_STATFS(mp, &mp->mnt_stat, td); return (0); } /* * Reload all incore data for a filesystem (used after running fsck on * the root filesystem and finding things to fix). 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) invalidate all cached file data. * 6) re-read inode data for all active vnodes. */ int ffs_reload(mp, cred, td) struct mount *mp; struct ucred *cred; struct thread *td; { struct vnode *vp, *nvp, *devvp; struct inode *ip; void *space; struct buf *bp; struct fs *fs, *newfs; dev_t dev; int i, blks, size, error; int32_t *lp; u_int sectorsize; if ((mp->mnt_flag & MNT_RDONLY) == 0) return (EINVAL); /* * Step 1: invalidate all cached meta-data. */ devvp = VFSTOUFS(mp)->um_devvp; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); error = vinvalbuf(devvp, 0, cred, td, 0, 0); VOP_UNLOCK(devvp, 0, td); if (error) panic("ffs_reload: dirty1"); dev = devvp->v_rdev; /* * Only VMIO the backing device if the backing device is a real * block device. */ if (vn_isdisk(devvp, NULL)) { vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); vfs_object_create(devvp, td, td->td_ucred); mtx_lock(&devvp->v_interlock); VOP_UNLOCK(devvp, LK_INTERLOCK, td); } /* * Step 2: re-read superblock from disk. */ if (VOP_IOCTL(devvp, DIOCGSECTORSIZE, (caddr_t)§orsize, FREAD, NOCRED, td) != 0) size = DEV_BSIZE; else size = sectorsize; if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, NOCRED,&bp)) != 0) return (error); newfs = (struct fs *)bp->b_data; if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || newfs->fs_bsize < sizeof(struct fs)) { brelse(bp); return (EIO); /* XXX needs translation */ } fs = VFSTOUFS(mp)->um_fs; /* * Copy pointer fields back into superblock before copying in XXX * new superblock. These should really be in the ufsmount. XXX * Note that important parameters (eg fs_ncg) are unchanged. */ newfs->fs_csp = fs->fs_csp; newfs->fs_maxcluster = fs->fs_maxcluster; newfs->fs_contigdirs = fs->fs_contigdirs; newfs->fs_active = fs->fs_active; bcopy(newfs, fs, (u_int)fs->fs_sbsize); if (fs->fs_sbsize < SBSIZE) bp->b_flags |= B_INVAL | B_NOCACHE; brelse(bp); mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; ffs_oldfscompat(fs); /* An old fsck may have zeroed these fields, so recheck them. */ if (fs->fs_avgfilesize <= 0) /* XXX */ fs->fs_avgfilesize = AVFILESIZ; /* XXX */ if (fs->fs_avgfpdir <= 0) /* XXX */ fs->fs_avgfpdir = AFPDIR; /* XXX */ if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("%s: reload pending error: blocks %d files %d\n", fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } /* * Step 3: re-read summary information from disk. */ blks = howmany(fs->fs_cssize, fs->fs_fsize); space = fs->fs_csp; 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) { lp = fs->fs_maxcluster; for (i = 0; i < fs->fs_ncg; i++) *lp++ = fs->fs_contigsumsize; } loop: mtx_lock(&mntvnode_mtx); for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { if (vp->v_mount != mp) { mtx_unlock(&mntvnode_mtx); goto loop; } nvp = TAILQ_NEXT(vp, v_nmntvnodes); mtx_unlock(&mntvnode_mtx); /* * Step 4: invalidate all inactive vnodes. */ if (vrecycle(vp, NULL, td)) goto loop; /* * Step 5: invalidate all cached file data. */ mtx_lock(&vp->v_interlock); if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { goto loop; } if (vinvalbuf(vp, 0, cred, td, 0, 0)) panic("ffs_reload: dirty2"); /* * Step 6: 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); return (error); } ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ip->i_number)); ip->i_effnlink = ip->i_nlink; brelse(bp); vput(vp); mtx_lock(&mntvnode_mtx); } mtx_unlock(&mntvnode_mtx); return (0); } #include int bigcgs = 0; SYSCTL_INT(_debug, OID_AUTO, bigcgs, CTLFLAG_RW, &bigcgs, 0, ""); /* * Common code for mount and mountroot */ int ffs_mountfs(devvp, mp, td, malloctype) struct vnode *devvp; struct mount *mp; struct thread *td; struct malloc_type *malloctype; { struct ufsmount *ump; struct buf *bp; struct fs *fs; dev_t dev; void *space; int error, i, blks, size, ronly; int32_t *lp; struct ucred *cred; u_int64_t maxfilesize; /* XXX */ size_t strsize; int ncount; u_int sectorsize; dev = devvp->v_rdev; cred = td ? td->td_ucred : NOCRED; /* * Disallow multiple mounts of the same device. * Disallow mounting of a device that is currently in use * (except for root, which might share swap device for miniroot). * Flush out any old buffers remaining from a previous use. */ error = vfs_mountedon(devvp); if (error) return (error); ncount = vcount(devvp); if (ncount > 1 && devvp != rootvp) return (EBUSY); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0); VOP_UNLOCK(devvp, 0, td); if (error) return (error); /* * Only VMIO the backing device if the backing device is a real * block device. * Note that it is optional that the backing device be VMIOed. This * increases the opportunity for metadata caching. */ if (vn_isdisk(devvp, NULL)) { vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); vfs_object_create(devvp, td, cred); mtx_lock(&devvp->v_interlock); VOP_UNLOCK(devvp, LK_INTERLOCK, td); } ronly = (mp->mnt_flag & MNT_RDONLY) != 0; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); /* * XXX: We don't re-VOP_OPEN in FREAD|FWRITE mode if the filesystem * XXX: is subsequently remounted, so open it FREAD|FWRITE from the * XXX: start to avoid getting trashed later on. */ #ifdef notyet error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td); #else error = VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, td); #endif VOP_UNLOCK(devvp, 0, td); if (error) return (error); if (devvp->v_rdev->si_iosize_max != 0) mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max; if (mp->mnt_iosize_max > MAXPHYS) mp->mnt_iosize_max = MAXPHYS; if (VOP_IOCTL(devvp, DIOCGSECTORSIZE, (caddr_t)§orsize, FREAD, cred, td) != 0) size = DEV_BSIZE; else size = sectorsize; bp = NULL; ump = NULL; if ((error = bread(devvp, SBLOCK, SBSIZE, cred, &bp)) != 0) goto out; fs = (struct fs *)bp->b_data; if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || fs->fs_bsize < sizeof(struct fs)) { error = EINVAL; /* XXX needs translation */ goto out; } fs->fs_fmod = 0; 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_NEEDSFSCK) == 0 && (fs->fs_flags & FS_DOSOFTDEP))) { printf( "WARNING: %s was not properly dismounted\n", fs->fs_fsmnt); } else { printf( "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n", fs->fs_fsmnt); error = EPERM; goto out; } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("%s: lost blocks %d files %d\n", fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("%s: mount pending error: blocks %d files %d\n", fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { error = EROFS; /* needs translation */ goto out; } ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK | M_ZERO); ump->um_malloctype = malloctype; ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, M_WAITOK); 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_balloc = ffs_balloc; bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); if (fs->fs_sbsize < SBSIZE) bp->b_flags |= B_INVAL | B_NOCACHE; brelse(bp); bp = NULL; fs = ump->um_fs; fs->fs_ronly = ronly; 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); space = malloc((u_long)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; if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, cred, &bp)) != 0) { free(fs->fs_csp, M_UFSMNT); goto out; } bcopy(bp->b_data, space, (u_int)size); space = (char *)space + size; brelse(bp); bp = NULL; } 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); fs->fs_active = NULL; /* Compatibility for old filesystems XXX */ if (fs->fs_avgfilesize <= 0) /* XXX */ fs->fs_avgfilesize = AVFILESIZ; /* XXX */ if (fs->fs_avgfpdir <= 0) /* XXX */ fs->fs_avgfpdir = AFPDIR; /* XXX */ mp->mnt_data = (qaddr_t)ump; mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0]; mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1]; if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 || vfs_getvfs(&mp->mnt_stat.f_fsid)) vfs_getnewfsid(mp); mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; mp->mnt_flag |= MNT_LOCAL; ump->um_mountp = mp; ump->um_dev = dev; ump->um_devvp = devvp; 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 devvp->v_rdev->si_mountpoint = mp; ffs_oldfscompat(fs); /* * Set FS local "last mounted on" information (NULL pad) */ copystr( mp->mnt_stat.f_mntonname, /* mount point*/ fs->fs_fsmnt, /* copy area*/ sizeof(fs->fs_fsmnt) - 1, /* max size*/ &strsize); /* real size*/ bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize); 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; } ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ maxfilesize = (u_int64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */ if (fs->fs_maxfilesize > maxfilesize) /* XXX */ fs->fs_maxfilesize = maxfilesize; /* XXX */ if (bigcgs) { if (fs->fs_sparecon[0] <= 0) fs->fs_sparecon[0] = fs->fs_cgsize; fs->fs_cgsize = fs->fs_bsize; } if (ronly == 0) { if ((fs->fs_flags & FS_DOSOFTDEP) && (error = softdep_mount(devvp, mp, fs, cred)) != 0) { free(fs->fs_csp, M_UFSMNT); 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); } #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: devvp->v_rdev->si_mountpoint = NULL; if (bp) brelse(bp); /* XXX: see comment above VOP_OPEN */ #ifdef notyet (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, td); #else (void)VOP_CLOSE(devvp, FREAD|FWRITE, cred, td); #endif if (ump) { free(ump->um_fs, M_UFSMNT); free(ump, M_UFSMNT); mp->mnt_data = (qaddr_t)0; } return (error); } /* * Sanity checks for old filesystems. * * XXX - goes away some day. */ static int ffs_oldfscompat(fs) struct fs *fs; { fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */ fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */ if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ fs->fs_nrpos = 8; /* XXX */ if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ #if 0 int i; /* XXX */ u_int64_t sizepb = fs->fs_bsize; /* XXX */ /* XXX */ fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */ for (i = 0; i < NIADDR; i++) { /* XXX */ sizepb *= NINDIR(fs); /* XXX */ fs->fs_maxfilesize += sizepb; /* XXX */ } /* XXX */ #endif fs->fs_maxfilesize = (u_quad_t) 1LL << 39; fs->fs_qbmask = ~fs->fs_bmask; /* XXX */ fs->fs_qfmask = ~fs->fs_fmask; /* XXX */ } /* XXX */ return (0); } /* * unmount system call */ int ffs_unmount(mp, mntflags, td) struct mount *mp; int mntflags; struct thread *td; { struct ufsmount *ump = VFSTOUFS(mp); struct fs *fs; int error, flags; flags = 0; if (mntflags & MNT_FORCE) { flags |= FORCECLOSE; } #ifdef UFS_EXTATTR if ((error = ufs_extattr_stop(mp, td))) { if (error != EOPNOTSUPP) printf("ffs_unmount: ufs_extattr_stop returned %d\n", error); } else { ufs_extattr_uepm_destroy(&ump->um_extattr); } #endif if (mp->mnt_flag & MNT_SOFTDEP) { if ((error = softdep_flushfiles(mp, flags, td)) != 0) return (error); } else { if ((error = ffs_flushfiles(mp, flags, td)) != 0) return (error); } fs = ump->um_fs; if (bigcgs) { fs->fs_cgsize = fs->fs_sparecon[0]; fs->fs_sparecon[0] = 0; } if (fs->fs_pendingblocks != 0 || fs->fs_pendinginodes != 0) { printf("%s: unmount pending error: blocks %d files %d\n", fs->fs_fsmnt, fs->fs_pendingblocks, fs->fs_pendinginodes); fs->fs_pendingblocks = 0; fs->fs_pendinginodes = 0; } if (fs->fs_ronly == 0) { fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1; error = ffs_sbupdate(ump, MNT_WAIT); if (error) { fs->fs_clean = 0; return (error); } } ump->um_devvp->v_rdev->si_mountpoint = NULL; vinvalbuf(ump->um_devvp, V_SAVE, NOCRED, td, 0, 0); /* XXX: see comment above VOP_OPEN */ #ifdef notyet error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, NOCRED, td); #else error = VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED, td); #endif vrele(ump->um_devvp); free(fs->fs_csp, M_UFSMNT); free(fs, M_UFSMNT); free(ump, M_UFSMNT); mp->mnt_data = (qaddr_t)0; mp->mnt_flag &= ~MNT_LOCAL; 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 error; ump = VFSTOUFS(mp); #ifdef QUOTA if (mp->mnt_flag & MNT_QUOTA) { int i; error = vflush(mp, 0, SKIPSYSTEM|flags); if (error) return (error); for (i = 0; i < MAXQUOTAS; i++) { if (ump->um_quotas[i] == NULLVP) continue; quotaoff(td, mp, i); } /* * Here we fall through to vflush again to ensure * that we have gotten rid of all the system vnodes. */ } #endif if (ump->um_devvp->v_flag & VCOPYONWRITE) { if ((error = vflush(mp, 0, SKIPSYSTEM | flags)) != 0) return (error); ffs_snapshot_unmount(mp); /* * Here we fall through to vflush again to ensure * that we have gotten rid of all the system vnodes. */ } /* * Flush all the files. */ if ((error = vflush(mp, 0, flags)) != 0) return (error); /* * Flush filesystem metadata. */ vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td); error = VOP_FSYNC(ump->um_devvp, td->td_ucred, MNT_WAIT, td); VOP_UNLOCK(ump->um_devvp, 0, td); return (error); } /* * Get filesystem statistics. */ int ffs_statfs(mp, sbp, td) struct mount *mp; struct statfs *sbp; struct thread *td; { struct ufsmount *ump; struct fs *fs; ump = VFSTOUFS(mp); fs = ump->um_fs; if (fs->fs_magic != FS_MAGIC) panic("ffs_statfs"); sbp->f_bsize = fs->fs_fsize; sbp->f_iosize = fs->fs_bsize; sbp->f_blocks = fs->fs_dsize; 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 - ROOTINO; sbp->f_ffree = fs->fs_cstotal.cs_nifree + fs->fs_pendinginodes; if (sbp != &mp->mnt_stat) { sbp->f_type = mp->mnt_vfc->vfc_typenum; bcopy((caddr_t)mp->mnt_stat.f_mntonname, (caddr_t)&sbp->f_mntonname[0], MNAMELEN); bcopy((caddr_t)mp->mnt_stat.f_mntfromname, (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); } return (0); } /* * 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 `MPBUSY'. */ int ffs_sync(mp, waitfor, cred, td) struct mount *mp; int waitfor; struct ucred *cred; struct thread *td; { struct vnode *nvp, *vp, *devvp; struct inode *ip; struct ufsmount *ump = VFSTOUFS(mp); struct fs *fs; int error, count, wait, lockreq, allerror = 0; fs = ump->um_fs; if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ printf("fs = %s\n", fs->fs_fsmnt); panic("ffs_sync: rofs mod"); } /* * Write back each (modified) inode. */ wait = 0; lockreq = LK_EXCLUSIVE | LK_NOWAIT; if (waitfor == MNT_WAIT) { wait = 1; lockreq = LK_EXCLUSIVE; } mtx_lock(&mntvnode_mtx); loop: for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) { /* * If the vnode that we are about to sync is no longer * associated with this mount point, start over. */ if (vp->v_mount != mp) goto loop; /* * Depend on the mntvnode_slock 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. */ nvp = TAILQ_NEXT(vp, v_nmntvnodes); ip = VTOI(vp); if (vp->v_type == VNON || ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && TAILQ_EMPTY(&vp->v_dirtyblkhd))) { continue; } if (vp->v_type != VCHR) { mtx_unlock(&mntvnode_mtx); if ((error = vget(vp, lockreq, td)) != 0) { mtx_lock(&mntvnode_mtx); if (error == ENOENT) goto loop; } else { if ((error = VOP_FSYNC(vp, cred, waitfor, td)) != 0) allerror = error; VOP_UNLOCK(vp, 0, td); vrele(vp); mtx_lock(&mntvnode_mtx); } } else { mtx_unlock(&mntvnode_mtx); UFS_UPDATE(vp, wait); mtx_lock(&mntvnode_mtx); } if (TAILQ_NEXT(vp, v_nmntvnodes) != nvp) goto loop; } mtx_unlock(&mntvnode_mtx); /* * Force stale filesystem control information to be flushed. */ if (waitfor == MNT_WAIT) { if ((error = softdep_flushworklist(ump->um_mountp, &count, td))) allerror = error; /* Flushed work items may create new vnodes to clean */ if (count) { mtx_lock(&mntvnode_mtx); goto loop; } } #ifdef QUOTA qsync(mp); #endif devvp = ump->um_devvp; mtx_lock(&devvp->v_interlock); if (waitfor != MNT_LAZY && (devvp->v_numoutput > 0 || TAILQ_FIRST(&devvp->v_dirtyblkhd))) { mtx_unlock(&devvp->v_interlock); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); if ((error = VOP_FSYNC(devvp, cred, waitfor, td)) != 0) allerror = error; VOP_UNLOCK(devvp, 0, td); if (waitfor == MNT_WAIT) { mtx_lock(&mntvnode_mtx); goto loop; } } else mtx_unlock(&devvp->v_interlock); /* * Write back modified superblock. */ if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0) allerror = error; return (allerror); } /* * Look up a FFS dinode number to find its incore vnode, otherwise read it * in from disk. If it is in core, wait for the lock bit to clear, then * return the inode locked. Detection and handling of mount points must be * done by the calling routine. */ static int ffs_inode_hash_lock; /* * ffs_inode_hash_lock is a variable to manage mutual exclusion * of vnode allocation and intertion to the hash, especially to * avoid holding more than one vnodes for the same inode in the * hash table. ffs_inode_hash_lock must hence be tested-and-set * or cleared atomically, accomplished by ffs_inode_hash_mtx. * * As vnode allocation may block during MALLOC() and zone * allocation, we should also do msleep() to give away the CPU * if anyone else is allocating a vnode. lockmgr is not suitable * here because someone else may insert to the hash table the * vnode we are trying to allocate during our sleep, in which * case the hash table needs to be examined once again after * waking up. */ static struct mtx ffs_inode_hash_mtx; int ffs_vget(mp, ino, flags, vpp) struct mount *mp; ino_t ino; int flags; struct vnode **vpp; { struct fs *fs; struct inode *ip; struct ufsmount *ump; struct buf *bp; struct vnode *vp; dev_t dev; int error, want_wakeup; ump = VFSTOUFS(mp); dev = ump->um_dev; restart: if ((error = ufs_ihashget(dev, ino, flags, vpp)) != 0) return (error); if (*vpp != NULL) return (0); /* * Lock out the creation of new entries in the FFS hash table in * case getnewvnode() or MALLOC() blocks, otherwise a duplicate * may occur! */ mtx_lock(&ffs_inode_hash_mtx); if (ffs_inode_hash_lock) { while (ffs_inode_hash_lock) { ffs_inode_hash_lock = -1; msleep(&ffs_inode_hash_lock, &ffs_inode_hash_mtx, PVM, "ffsvgt", 0); } mtx_unlock(&ffs_inode_hash_mtx); goto restart; } ffs_inode_hash_lock = 1; mtx_unlock(&ffs_inode_hash_mtx); /* * If this MALLOC() is performed after the getnewvnode() * it might block, leaving a vnode with a NULL v_data to be * found by ffs_sync() if a sync happens to fire right then, * which will cause a panic because ffs_sync() blindly * dereferences vp->v_data (as well it should). */ MALLOC(ip, struct inode *, sizeof(struct inode), ump->um_malloctype, M_WAITOK); /* Allocate a new vnode/inode. */ error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp); if (error) { /* * Do not wake up processes while holding the mutex, * otherwise the processes waken up immediately hit * themselves into the mutex. */ mtx_lock(&ffs_inode_hash_mtx); want_wakeup = ffs_inode_hash_lock < 0; ffs_inode_hash_lock = 0; mtx_unlock(&ffs_inode_hash_mtx); if (want_wakeup) wakeup(&ffs_inode_hash_lock); *vpp = NULL; FREE(ip, ump->um_malloctype); return (error); } bzero((caddr_t)ip, sizeof(struct inode)); /* * FFS supports lock sharing in the stack of vnodes */ vp->v_vnlock = &vp->v_lock; lockinit(vp->v_vnlock, PINOD, "inode", VLKTIMEOUT, LK_CANRECURSE); vp->v_data = ip; ip->i_vnode = vp; ip->i_fs = fs = ump->um_fs; ip->i_dev = dev; ip->i_number = ino; #ifdef QUOTA { int i; for (i = 0; i < MAXQUOTAS; i++) ip->i_dquot[i] = NODQUOT; } #endif /* * Put it onto its hash chain and lock it so that other requests for * this inode will block if they arrive while we are sleeping waiting * for old data structures to be purged or for the contents of the * disk portion of this inode to be read. */ ufs_ihashins(ip); /* * Do not wake up processes while holding the mutex, * otherwise the processes waken up immediately hit * themselves into the mutex. */ mtx_lock(&ffs_inode_hash_mtx); want_wakeup = ffs_inode_hash_lock < 0; ffs_inode_hash_lock = 0; mtx_unlock(&ffs_inode_hash_mtx); if (want_wakeup) wakeup(&ffs_inode_hash_lock); /* Read in the disk contents for the inode, copy into the inode. */ error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), (int)fs->fs_bsize, NOCRED, &bp); if (error) { /* * 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(). */ brelse(bp); vput(vp); *vpp = NULL; return (error); } ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); if (DOINGSOFTDEP(vp)) 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, ffs_specop_p, ffs_fifoop_p, &vp); if (error) { vput(vp); *vpp = NULL; return (error); } /* * Finish inode initialization now that aliasing has been resolved. */ ip->i_devvp = ump->um_devvp; VREF(ip->i_devvp); /* * 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) { ip->i_gen = random() / 2 + 1; if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) ip->i_flag |= IN_MODIFIED; } /* * Ensure that uid and gid are correct. This is a temporary * fix until fsck has been changed to do the update. */ if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ ip->i_uid = ip->i_din.di_ouid; /* XXX */ ip->i_gid = ip->i_din.di_ogid; /* XXX */ } /* XXX */ *vpp = vp; return (0); } /* * File handle to vnode * * Have to be really careful about stale file handles: * - check that the inode number is valid * - 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 */ int ffs_fhtovp(mp, fhp, vpp) struct mount *mp; struct fid *fhp; struct vnode **vpp; { struct ufid *ufhp; struct fs *fs; ufhp = (struct ufid *)fhp; fs = VFSTOUFS(mp)->um_fs; if (ufhp->ufid_ino < ROOTINO || ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg) return (ESTALE); return (ufs_fhtovp(mp, ufhp, vpp)); } /* * Vnode pointer to File handle */ /* ARGSUSED */ int ffs_vptofh(vp, fhp) struct vnode *vp; struct fid *fhp; { struct inode *ip; struct ufid *ufhp; ip = VTOI(vp); ufhp = (struct ufid *)fhp; ufhp->ufid_len = sizeof(struct ufid); ufhp->ufid_ino = ip->i_number; ufhp->ufid_gen = ip->i_gen; return (0); } /* * Initialize the filesystem; just use ufs_init. */ static int ffs_init(vfsp) struct vfsconf *vfsp; { softdep_initialize(); mtx_init(&ffs_inode_hash_mtx, "ifsvgt", NULL, MTX_DEF); return (ufs_init(vfsp)); } /* * Write a superblock and associated information back to disk. */ static int ffs_sbupdate(mp, waitfor) struct ufsmount *mp; int waitfor; { struct fs *dfs, *fs = mp->um_fs; struct buf *bp; int blks; void *space; int i, size, error, allerror = 0; /* * First write back the summary information. */ blks = howmany(fs->fs_cssize, fs->fs_fsize); space = fs->fs_csp; 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; bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i), size, 0, 0); bcopy(space, bp->b_data, (u_int)size); space = (char *)space + size; if (waitfor != MNT_WAIT) bawrite(bp); else if ((error = bwrite(bp)) != 0) allerror = error; } /* * Now write back the superblock itself. If any errors occurred * up to this point, then fail so that the superblock avoids * being written out as clean. */ if (allerror) return (allerror); bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0); fs->fs_fmod = 0; fs->fs_time = time_second; bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); /* Restore compatibility to old filesystems. XXX */ dfs = (struct fs *)bp->b_data; /* XXX */ if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ dfs->fs_nrpos = -1; /* XXX */ if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ int32_t *lp, tmp; /* XXX */ /* XXX */ lp = (int32_t *)&dfs->fs_qbmask; /* XXX */ tmp = lp[4]; /* XXX */ for (i = 4; i > 0; i--) /* XXX */ lp[i] = lp[i-1]; /* XXX */ lp[0] = tmp; /* XXX */ } /* XXX */ dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ if (waitfor != MNT_WAIT) bawrite(bp); else if ((error = bwrite(bp)) != 0) allerror = error; return (allerror); }