/* $NetBSD: ffs_vfsops.c,v 1.52 1999/08/03 19:22:43 drochner Exp $ */ /* * 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 */ #if defined(_KERNEL) && !defined(_LKM) #include "opt_ffs.h" #include "opt_quota.h" #include "opt_compat_netbsd.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern struct lock ufs_hashlock; int ffs_sbupdate __P((struct ufsmount *, int)); extern struct vnodeopv_desc ffs_vnodeop_opv_desc; extern struct vnodeopv_desc ffs_specop_opv_desc; extern struct vnodeopv_desc ffs_fifoop_opv_desc; struct vnodeopv_desc *ffs_vnodeopv_descs[] = { &ffs_vnodeop_opv_desc, &ffs_specop_opv_desc, &ffs_fifoop_opv_desc, NULL, }; struct vfsops ffs_vfsops = { MOUNT_FFS, ffs_mount, ufs_start, ffs_unmount, ufs_root, ufs_quotactl, ffs_statfs, ffs_sync, ffs_vget, ffs_fhtovp, ffs_vptofh, ffs_init, ffs_sysctl, ffs_mountroot, ufs_check_export, ffs_vnodeopv_descs, }; struct pool ffs_inode_pool; /* * Called by main() when ffs is going to be mounted as root. */ int ffs_mountroot() { extern struct vnode *rootvp; struct fs *fs; struct mount *mp; struct proc *p = curproc; /* XXX */ struct ufsmount *ump; int error; if (root_device->dv_class != DV_DISK) return (ENODEV); /* * Get vnodes for rootdev. */ if (bdevvp(rootdev, &rootvp)) panic("ffs_mountroot: can't setup bdevvp's"); if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) { vrele(rootvp); return (error); } if ((error = ffs_mountfs(rootvp, mp, p)) != 0) { mp->mnt_op->vfs_refcount--; vfs_unbusy(mp); free(mp, M_MOUNT); vrele(rootvp); return (error); } simple_lock(&mountlist_slock); CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); simple_unlock(&mountlist_slock); ump = VFSTOUFS(mp); fs = ump->um_fs; memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt)); (void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0); (void)ffs_statfs(mp, &mp->mnt_stat, p); vfs_unbusy(mp); inittodr(fs->fs_time); return (0); } /* * VFS Operations. * * mount system call */ int ffs_mount(mp, path, data, ndp, p) register struct mount *mp; const char *path; void *data; struct nameidata *ndp; struct proc *p; { struct vnode *devvp; struct ufs_args args; struct ufsmount *ump = NULL; register struct fs *fs; size_t size; int error, flags; mode_t accessmode; error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)); if (error) 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; if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { flags = WRITECLOSE; if (mp->mnt_flag & MNT_FORCE) flags |= FORCECLOSE; error = ffs_flushfiles(mp, flags, p); if (error == 0 && ffs_cgupdate(ump, MNT_WAIT) == 0 && fs->fs_clean & FS_WASCLEAN) { fs->fs_clean = FS_ISCLEAN; (void) ffs_sbupdate(ump, MNT_WAIT); } if (error) return (error); fs->fs_ronly = 1; } if (mp->mnt_flag & MNT_RELOAD) { error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p); if (error) return (error); } if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) { /* * If upgrade to read-write by non-root, then verify * that user has necessary permissions on the device. */ if (p->p_ucred->cr_uid != 0) { devvp = ump->um_devvp; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_ACCESS(devvp, VREAD | VWRITE, p->p_ucred, p); VOP_UNLOCK(devvp, 0); if (error) return (error); } fs->fs_ronly = 0; fs->fs_clean <<= 1; fs->fs_fmod = 1; } if (args.fspec == 0) { /* * Process export requests. */ return (vfs_export(mp, &ump->um_export, &args.export)); } } /* * 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, p); if ((error = namei(ndp)) != 0) return (error); devvp = ndp->ni_vp; if (devvp->v_type != VBLK) { vrele(devvp); return (ENOTBLK); } if (major(devvp->v_rdev) >= nblkdev) { vrele(devvp); return (ENXIO); } /* * If mount by non-root, then verify that user has necessary * permissions on the device. */ if (p->p_ucred->cr_uid != 0) { accessmode = VREAD; if ((mp->mnt_flag & MNT_RDONLY) == 0) accessmode |= VWRITE; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); VOP_UNLOCK(devvp, 0); if (error) { vrele(devvp); return (error); } } if ((mp->mnt_flag & MNT_UPDATE) == 0) error = ffs_mountfs(devvp, mp, p); else { if (devvp != ump->um_devvp) error = EINVAL; /* needs translation */ else vrele(devvp); } if (error) { vrele(devvp); return (error); } ump = VFSTOUFS(mp); fs = ump->um_fs; (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); memset(fs->fs_fsmnt + size, 0, sizeof(fs->fs_fsmnt) - size); memcpy(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN); (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size); if (fs->fs_fmod != 0) { /* XXX */ fs->fs_fmod = 0; if (fs->fs_clean & FS_WASCLEAN) fs->fs_time = time.tv_sec; else printf("%s: file system not clean (fs_flags=%x); please fsck(8)\n", mp->mnt_stat.f_mntfromname, fs->fs_clean); (void) ffs_cgupdate(ump, MNT_WAIT); } 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(mountp, cred, p) register struct mount *mountp; struct ucred *cred; struct proc *p; { register struct vnode *vp, *nvp, *devvp; struct inode *ip; struct buf *bp; struct fs *fs, *newfs; struct partinfo dpart; int i, blks, size, error; int32_t *lp; caddr_t cp; if ((mountp->mnt_flag & MNT_RDONLY) == 0) return (EINVAL); /* * Step 1: invalidate all cached meta-data. */ devvp = VFSTOUFS(mountp)->um_devvp; if (vinvalbuf(devvp, 0, cred, p, 0, 0)) panic("ffs_reload: dirty1"); /* * Step 2: re-read superblock from disk. */ if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) size = DEV_BSIZE; else size = dpart.disklab->d_secsize; error = bread(devvp, (ufs_daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp); if (error) { brelse(bp); return (error); } fs = VFSTOUFS(mountp)->um_fs; newfs = malloc(fs->fs_sbsize, M_UFSMNT, M_WAITOK); memcpy(newfs, bp->b_data, fs->fs_sbsize); #ifdef FFS_EI if (VFSTOUFS(mountp)->um_flags & UFS_NEEDSWAP) ffs_sb_swap((struct fs*)bp->b_data, newfs, 0); #endif if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE || newfs->fs_bsize < sizeof(struct fs)) { brelse(bp); free(newfs, M_UFSMNT); return (EIO); /* XXX needs translation */ } /* * 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. */ memcpy(&newfs->fs_csp[0], &fs->fs_csp[0], sizeof(fs->fs_csp)); newfs->fs_maxcluster = fs->fs_maxcluster; memcpy(fs, newfs, (u_int)fs->fs_sbsize); if (fs->fs_sbsize < SBSIZE) bp->b_flags |= B_INVAL; brelse(bp); free(newfs, M_UFSMNT); mountp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; ffs_oldfscompat(fs); /* * Step 3: re-read summary information from disk. */ blks = howmany(fs->fs_cssize, fs->fs_fsize); 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) { brelse(bp); return (error); } #ifdef FFS_EI if (UFS_MPNEEDSWAP(mountp)) ffs_csum_swap((struct csum*)bp->b_data, (struct csum*)fs->fs_csp[fragstoblks(fs, i)], size); else #endif memcpy(fs->fs_csp[fragstoblks(fs, i)], bp->b_data, (size_t)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: simple_lock(&mntvnode_slock); for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { if (vp->v_mount != mountp) { simple_unlock(&mntvnode_slock); goto loop; } nvp = vp->v_mntvnodes.le_next; /* * Step 4: invalidate all inactive vnodes. */ if (vrecycle(vp, &mntvnode_slock, p)) goto loop; /* * Step 5: invalidate all cached file data. */ simple_lock(&vp->v_interlock); simple_unlock(&mntvnode_slock); if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK)) goto loop; if (vinvalbuf(vp, 0, cred, p, 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) { brelse(bp); vput(vp); return (error); } cp = (caddr_t)bp->b_data + (ino_to_fsbo(fs, ip->i_number) * DINODE_SIZE); #ifdef FFS_EI if (UFS_MPNEEDSWAP(mountp)) ffs_dinode_swap((struct dinode *)cp, &ip->i_din.ffs_din); else #endif memcpy(&ip->i_din.ffs_din, cp, DINODE_SIZE); brelse(bp); vput(vp); simple_lock(&mntvnode_slock); } simple_unlock(&mntvnode_slock); return (0); } /* * Common code for mount and mountroot */ int ffs_mountfs(devvp, mp, p) register struct vnode *devvp; struct mount *mp; struct proc *p; { struct ufsmount *ump; struct buf *bp; struct fs *fs; dev_t dev; struct partinfo dpart; caddr_t base, space; int blks; int error, i, size, ronly; #ifdef FFS_EI int needswap; #endif int32_t *lp; struct ucred *cred; extern struct vnode *rootvp; u_int64_t maxfilesize; /* XXX */ u_int32_t sbsize; dev = devvp->v_rdev; cred = p ? p->p_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. */ if ((error = vfs_mountedon(devvp)) != 0) return (error); if (vcount(devvp) > 1 && devvp != rootvp) return (EBUSY); if ((error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0)) != 0) return (error); ronly = (mp->mnt_flag & MNT_RDONLY) != 0; error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); if (error) return (error); if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred, p) != 0) size = DEV_BSIZE; else size = dpart.disklab->d_secsize; bp = NULL; ump = NULL; error = bread(devvp, (ufs_daddr_t)(SBOFF / size), SBSIZE, cred, &bp); if (error) goto out; fs = (struct fs*)bp->b_data; if (fs->fs_magic == FS_MAGIC) { sbsize = fs->fs_sbsize; #ifdef FFS_EI needswap = 0; } else if (fs->fs_magic == bswap32(FS_MAGIC)) { sbsize = bswap32(fs->fs_sbsize); needswap = 1; #endif } else { error = EINVAL; goto out; } if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) { error = EINVAL; goto out; } fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK); memcpy(fs, bp->b_data, sbsize); #ifdef FFS_EI if (needswap) ffs_sb_swap((struct fs*)bp->b_data, fs, 0); #endif if (fs->fs_bsize > MAXBSIZE || fs->fs_bsize < sizeof(struct fs)) { error = EINVAL; goto out; } /* make sure cylinder group summary area is a reasonable size. */ if (fs->fs_cgsize == 0 || fs->fs_cpg == 0 || fs->fs_ncg > fs->fs_ncyl / fs->fs_cpg + 1 || fs->fs_cssize > fragroundup(fs, fs->fs_ncg * sizeof(struct csum))) { error = EINVAL; /* XXX needs translation */ goto out2; } /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */ if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) { error = EROFS; /* XXX what should be returned? */ goto out2; } ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); memset((caddr_t)ump, 0, sizeof *ump); ump->um_fs = fs; if (fs->fs_sbsize < SBSIZE) bp->b_flags |= B_INVAL; brelse(bp); bp = NULL; fs->fs_ronly = ronly; if (ronly == 0) { fs->fs_clean <<= 1; fs->fs_fmod = 1; } size = fs->fs_cssize; blks = howmany(size, fs->fs_fsize); if (fs->fs_contigsumsize > 0) size += fs->fs_ncg * sizeof(int32_t); base = space = malloc((u_long)size, M_UFSMNT, M_WAITOK); 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, cred, &bp); if (error) { free(base, M_UFSMNT); goto out2; } #ifdef FFS_EI if (needswap) ffs_csum_swap((struct csum*)bp->b_data, (struct csum*)space, size); else #endif memcpy(space, bp->b_data, (u_int)size); fs->fs_csp[fragstoblks(fs, i)] = (struct csum *)space; space += size; brelse(bp); bp = NULL; } if (fs->fs_contigsumsize > 0) { fs->fs_maxcluster = lp = (int32_t *)space; for (i = 0; i < fs->fs_ncg; i++) *lp++ = fs->fs_contigsumsize; } mp->mnt_data = (qaddr_t)ump; mp->mnt_stat.f_fsid.val[0] = (long)dev; mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_FFS); mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen; mp->mnt_flag |= MNT_LOCAL; #ifdef FFS_EI if (needswap) ump->um_flags |= UFS_NEEDSWAP; #endif 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; devvp->v_specflags |= SI_MOUNTEDON; ffs_oldfscompat(fs); ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */ maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; /* XXX */ if (fs->fs_maxfilesize > maxfilesize) /* XXX */ fs->fs_maxfilesize = maxfilesize; /* XXX */ return (0); out2: free(fs, M_UFSMNT); out: if (bp) brelse(bp); (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p); if (ump) { free(ump, M_UFSMNT); mp->mnt_data = (qaddr_t)0; } return (error); } /* * Sanity checks for old file systems. * * XXX - goes away some day. */ int ffs_oldfscompat(fs) struct fs *fs; { int i; 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 */ 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 */ 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, p) struct mount *mp; int mntflags; struct proc *p; { register struct ufsmount *ump; register struct fs *fs; int error, flags; flags = 0; if (mntflags & MNT_FORCE) flags |= FORCECLOSE; if ((error = ffs_flushfiles(mp, flags, p)) != 0) return (error); ump = VFSTOUFS(mp); fs = ump->um_fs; if (fs->fs_ronly == 0 && ffs_cgupdate(ump, MNT_WAIT) == 0 && fs->fs_clean & FS_WASCLEAN) { fs->fs_clean = FS_ISCLEAN; (void) ffs_sbupdate(ump, MNT_WAIT); } ump->um_devvp->v_specflags &= ~SI_MOUNTEDON; error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, NOCRED, p); vrele(ump->um_devvp); free(fs->fs_csp[0], 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, p) register struct mount *mp; int flags; struct proc *p; { extern int doforce; register struct ufsmount *ump; int error; if (!doforce) flags &= ~FORCECLOSE; ump = VFSTOUFS(mp); #ifdef QUOTA if (mp->mnt_flag & MNT_QUOTA) { int i; if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0) return (error); for (i = 0; i < MAXQUOTAS; i++) { if (ump->um_quotas[i] == NULLVP) continue; quotaoff(p, mp, i); } /* * Here we fall through to vflush again to ensure * that we have gotten rid of all the system vnodes. */ } #endif error = vflush(mp, NULLVP, flags); return (error); } /* * Get file system statistics. */ int ffs_statfs(mp, sbp, p) struct mount *mp; register struct statfs *sbp; struct proc *p; { register struct ufsmount *ump; register struct fs *fs; ump = VFSTOUFS(mp); fs = ump->um_fs; if (fs->fs_magic != FS_MAGIC) panic("ffs_statfs"); #ifdef COMPAT_09 sbp->f_type = 1; #else sbp->f_type = 0; #endif 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; sbp->f_bavail = (long) (((u_int64_t) fs->fs_dsize * (u_int64_t) (100 - fs->fs_minfree) / (u_int64_t) 100) - (u_int64_t) (fs->fs_dsize - sbp->f_bfree)); sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO; sbp->f_ffree = fs->fs_cstotal.cs_nifree; if (sbp != &mp->mnt_stat) { memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN); memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN); } strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN); 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, p) struct mount *mp; int waitfor; struct ucred *cred; struct proc *p; { struct vnode *vp, *nvp; struct inode *ip; struct ufsmount *ump = VFSTOUFS(mp); struct fs *fs; int error, allerror = 0; fs = ump->um_fs; if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */ printf("fs = %s\n", fs->fs_fsmnt); panic("update: rofs mod"); } /* * Write back each (modified) inode. */ simple_lock(&mntvnode_slock); loop: for (vp = mp->mnt_vnodelist.lh_first; 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; simple_lock(&vp->v_interlock); nvp = vp->v_mntvnodes.le_next; ip = VTOI(vp); if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && vp->v_dirtyblkhd.lh_first == NULL) { simple_unlock(&vp->v_interlock); continue; } simple_unlock(&mntvnode_slock); error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK); if (error) { simple_lock(&mntvnode_slock); if (error == ENOENT) goto loop; continue; } if ((error = VOP_FSYNC(vp, cred, waitfor == MNT_WAIT ? FSYNC_WAIT : 0, p)) != 0) allerror = error; vput(vp); simple_lock(&mntvnode_slock); } simple_unlock(&mntvnode_slock); /* * Force stale file system control information to be flushed. */ if ((error = VOP_FSYNC(ump->um_devvp, cred, waitfor == MNT_WAIT ? FSYNC_WAIT : 0, p)) != 0) allerror = error; #ifdef QUOTA qsync(mp); #endif /* * Write back modified superblock. */ if (fs->fs_fmod != 0) { fs->fs_fmod = 0; fs->fs_time = time.tv_sec; allerror = ffs_cgupdate(ump, waitfor); } 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. */ int ffs_vget(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { struct fs *fs; struct inode *ip; struct ufsmount *ump; struct buf *bp; struct vnode *vp; dev_t dev; int error; caddr_t cp; ump = VFSTOUFS(mp); dev = ump->um_dev; do { if ((*vpp = ufs_ihashget(dev, ino)) != NULL) return (0); } while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0)); /* Allocate a new vnode/inode. */ if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) { *vpp = NULL; lockmgr(&ufs_hashlock, LK_RELEASE, 0); return (error); } /* * XXX MFS ends up here, too, to allocate an inode. Should we * XXX create another pool for MFS inodes? */ ip = pool_get(&ffs_inode_pool, PR_WAITOK); memset((caddr_t)ip, 0, sizeof(struct inode)); 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); lockmgr(&ufs_hashlock, LK_RELEASE, 0); /* 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(). */ vput(vp); brelse(bp); *vpp = NULL; return (error); } cp = (caddr_t)bp->b_data + (ino_to_fsbo(fs, ino) * DINODE_SIZE); #ifdef FFS_EI if (UFS_MPNEEDSWAP(mp)) ffs_dinode_swap((struct dinode *)cp, &ip->i_din.ffs_din); else #endif memcpy(&ip->i_din.ffs_din, cp, DINODE_SIZE); brelse(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); /* * 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_ffs_uid = ip->i_din.ffs_din.di_ouid; /* XXX */ ip->i_ffs_gid = ip->i_din.ffs_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) register struct mount *mp; struct fid *fhp; struct vnode **vpp; { register 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; { register struct inode *ip; register 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_ffs_gen; return (0); } void ffs_init() { ufs_init(); pool_init(&ffs_inode_pool, sizeof(struct inode), 0, 0, 0, "ffsinopl", 0, pool_page_alloc_nointr, pool_page_free_nointr, M_FFSNODE); } int ffs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) int *name; u_int namelen; void *oldp; size_t *oldlenp; void *newp; size_t newlen; struct proc *p; { extern int doclusterread, doclusterwrite, doreallocblks, doasyncfree; /* all sysctl names at this level are terminal */ if (namelen != 1) return (ENOTDIR); /* overloaded */ switch (name[0]) { case FFS_CLUSTERREAD: return (sysctl_int(oldp, oldlenp, newp, newlen, &doclusterread)); case FFS_CLUSTERWRITE: return (sysctl_int(oldp, oldlenp, newp, newlen, &doclusterwrite)); case FFS_REALLOCBLKS: return (sysctl_int(oldp, oldlenp, newp, newlen, &doreallocblks)); case FFS_ASYNCFREE: return (sysctl_int(oldp, oldlenp, newp, newlen, &doasyncfree)); default: return (EOPNOTSUPP); } /* NOTREACHED */ } /* * Write a superblock and associated information back to disk. */ int ffs_sbupdate(mp, waitfor) struct ufsmount *mp; int waitfor; { register struct fs *fs = mp->um_fs; register struct buf *bp; int i, error = 0; int32_t saved_nrpos = fs->fs_nrpos; int64_t saved_qbmask = fs->fs_qbmask; int64_t saved_qfmask = fs->fs_qfmask; u_int64_t saved_maxfilesize = fs->fs_maxfilesize; /* Restore compatibility to old file systems. XXX */ if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */ fs->fs_nrpos = -1; /* XXX */ if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */ int32_t *lp, tmp; /* XXX */ /* XXX */ lp = (int32_t *)&fs->fs_qbmask; /* XXX nuke qfmask too */ tmp = lp[4]; /* XXX */ for (i = 4; i > 0; i--) /* XXX */ lp[i] = lp[i-1]; /* XXX */ lp[0] = tmp; /* XXX */ } /* XXX */ fs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */ bp = getblk(mp->um_devvp, SBOFF >> (fs->fs_fshift - fs->fs_fsbtodb), (int)fs->fs_sbsize, 0, 0); memcpy(bp->b_data, fs, fs->fs_sbsize); #ifdef FFS_EI if (mp->um_flags & UFS_NEEDSWAP) ffs_sb_swap(fs, (struct fs*)bp->b_data, 1); #endif fs->fs_nrpos = saved_nrpos; /* XXX */ fs->fs_qbmask = saved_qbmask; /* XXX */ fs->fs_qfmask = saved_qfmask; /* XXX */ fs->fs_maxfilesize = saved_maxfilesize; /* XXX */ if (waitfor == MNT_WAIT) error = bwrite(bp); else bawrite(bp); return (error); } int ffs_cgupdate(mp, waitfor) struct ufsmount *mp; int waitfor; { register struct fs *fs = mp->um_fs; register struct buf *bp; int blks; caddr_t space; int i, size, error = 0, allerror = 0; allerror = ffs_sbupdate(mp, waitfor); blks = howmany(fs->fs_cssize, fs->fs_fsize); space = (caddr_t)fs->fs_csp[0]; 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); #ifdef FFS_EI if (mp->um_flags & UFS_NEEDSWAP) ffs_csum_swap((struct csum*)space, (struct csum*)bp->b_data, size); else #endif memcpy(bp->b_data, space, (u_int)size); space += size; if (waitfor == MNT_WAIT) error = bwrite(bp); else bawrite(bp); } if (!allerror && error) allerror = error; return (allerror); }