diff options
Diffstat (limited to 'sys/ufs/ffs/ffs_vfsops.c')
| -rw-r--r-- | sys/ufs/ffs/ffs_vfsops.c | 950 |
1 files changed, 950 insertions, 0 deletions
diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c new file mode 100644 index 00000000000..2e6f959cc5d --- /dev/null +++ b/sys/ufs/ffs/ffs_vfsops.c @@ -0,0 +1,950 @@ +/* $NetBSD: ffs_vfsops.c,v 1.16 1995/06/18 14:48:22 cgd 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 8.14 (Berkeley) 11/28/94 + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/namei.h> +#include <sys/proc.h> +#include <sys/kernel.h> +#include <sys/vnode.h> +#include <sys/socket.h> +#include <sys/mount.h> +#include <sys/buf.h> +#include <sys/mbuf.h> +#include <sys/file.h> +#include <sys/disklabel.h> +#include <sys/ioctl.h> +#include <sys/errno.h> +#include <sys/malloc.h> + +#include <miscfs/specfs/specdev.h> + +#include <ufs/ufs/quota.h> +#include <ufs/ufs/ufsmount.h> +#include <ufs/ufs/inode.h> +#include <ufs/ufs/ufs_extern.h> + +#include <ufs/ffs/fs.h> +#include <ufs/ffs/ffs_extern.h> + +int ffs_sbupdate __P((struct ufsmount *, int)); + +struct vfsops ufs_vfsops = { + MOUNT_UFS, + ffs_mount, + ufs_start, + ffs_unmount, + ufs_root, + ufs_quotactl, + ffs_statfs, + ffs_sync, + ffs_vget, + ffs_fhtovp, + ffs_vptofh, + ffs_init, +}; + +extern u_long nextgennumber; + +/* + * Called by main() when ufs is going to be mounted as root. + * + * Name is updated by mount(8) after booting. + */ +#define ROOTNAME "root_device" + +ffs_mountroot() +{ + extern struct vnode *rootvp; + register struct fs *fs; + register struct mount *mp; + struct proc *p = curproc; /* XXX */ + struct ufsmount *ump; + size_t size; + int error; + + /* + * Get vnodes for swapdev and rootdev. + */ + if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp)) + panic("ffs_mountroot: can't setup bdevvp's"); + + mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); + bzero((char *)mp, (u_long)sizeof(struct mount)); + mp->mnt_op = &ufs_vfsops; + mp->mnt_flag = MNT_RDONLY; + if (error = ffs_mountfs(rootvp, mp, p)) { + free(mp, M_MOUNT); + return (error); + } + if (error = vfs_lock(mp)) { + (void)ffs_unmount(mp, 0, p); + free(mp, M_MOUNT); + return (error); + } + CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); + mp->mnt_vnodecovered = NULLVP; + ump = VFSTOUFS(mp); + fs = ump->um_fs; + bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); + fs->fs_fsmnt[0] = '/'; + bcopy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MNAMELEN); + (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, + &size); + bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); + (void)ffs_statfs(mp, &mp->mnt_stat, p); + vfs_unlock(mp); + inittodr(fs->fs_time); + return (0); +} + +/* + * VFS Operations. + * + * mount system call + */ +int +ffs_mount(mp, path, data, ndp, p) + register struct mount *mp; + char *path; + caddr_t data; + struct nameidata *ndp; + struct proc *p; +{ + struct vnode *devvp; + struct ufs_args args; + struct ufsmount *ump; + register struct fs *fs; + size_t size; + int error, flags; + mode_t accessmode; + + if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) + 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; + if (vfs_busy(mp)) + return (EBUSY); + 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); + } + vfs_unbusy(mp); + 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; + VOP_LOCK(devvp); + if (error = VOP_ACCESS(devvp, VREAD | VWRITE, + p->p_ucred, p)) { + VOP_UNLOCK(devvp); + return (error); + } + VOP_UNLOCK(devvp); + } + 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)) + 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; + VOP_LOCK(devvp); + if (error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) { + vput(devvp); + return (error); + } + VOP_UNLOCK(devvp); + } + 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); + bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); + bcopy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MNAMELEN); + (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, + &size); + bzero(mp->mnt_stat.f_mntfromname + size, 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; please fsck(8)\n", + mp->mnt_stat.f_mntfromname); + (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. + */ +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 csum *space; + struct buf *bp; + struct fs *fs; + struct partinfo dpart; + int i, blks, size, error; + + 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; + if (error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp)) + return (error); + fs = (struct fs *)bp->b_data; + if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || + fs->fs_bsize < sizeof(struct fs)) { + brelse(bp); + return (EIO); /* XXX needs translation */ + } + fs = VFSTOUFS(mountp)->um_fs; + bcopy(&fs->fs_csp[0], &((struct fs *)bp->b_data)->fs_csp[0], + sizeof(fs->fs_csp)); + bcopy(bp->b_data, fs, (u_int)fs->fs_sbsize); + if (fs->fs_sbsize < SBSIZE) + bp->b_flags |= B_INVAL; + brelse(bp); + 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); + space = 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; + if (error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, + NOCRED, &bp)) + return (error); + bcopy(bp->b_data, fs->fs_csp[fragstoblks(fs, i)], (u_int)size); + brelse(bp); + } +loop: + for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { + nvp = vp->v_mntvnodes.le_next; + /* + * Step 4: invalidate all inactive vnodes. + */ + if (vp->v_usecount == 0) { + vgone(vp); + continue; + } + /* + * Step 5: invalidate all cached file data. + */ + if (vget(vp, 1)) + 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); + if (error = + bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), + (int)fs->fs_bsize, NOCRED, &bp)) { + vput(vp); + return (error); + } + ip->i_din = *((struct dinode *)bp->b_data + + ino_to_fsbo(fs, ip->i_number)); + brelse(bp); + vput(vp); + if (vp->v_mount != mountp) + goto loop; + } + return (0); +} + +/* + * Common code for mount and mountroot + */ +int +ffs_mountfs(devvp, mp, p) + register struct vnode *devvp; + struct mount *mp; + struct proc *p; +{ + register struct ufsmount *ump; + struct buf *bp; + register struct fs *fs; + dev_t dev; + struct partinfo dpart; + caddr_t base, space; + int blks; + int error, i, size, ronly; + int32_t *lp; + struct ucred *cred; + extern struct vnode *rootvp; + u_int64_t maxfilesize; /* XXX */ + + 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)) + return (error); + if (vcount(devvp) > 1 && devvp != rootvp) + return (EBUSY); + if (error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0)) + return (error); + + ronly = (mp->mnt_flag & MNT_RDONLY) != 0; + if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) + 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; + if (error = bread(devvp, (daddr_t)(SBOFF / size), SBSIZE, cred, &bp)) + 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; + } + /* 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 out; + } + ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK); + bzero((caddr_t)ump, sizeof *ump); + ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT, + M_WAITOK); + bcopy(bp->b_data, ump->um_fs, (u_int)fs->fs_sbsize); + if (fs->fs_sbsize < SBSIZE) + bp->b_flags |= B_INVAL; + brelse(bp); + bp = NULL; + fs = ump->um_fs; + 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; + if (error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, + cred, &bp)) { + free(base, M_UFSMNT); + goto out; + } + bcopy(bp->b_data, space, (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_UFS); + 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; + 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); +out: + if (bp) + brelse(bp); + (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p); + if (ump) { + free(ump->um_fs, M_UFSMNT); + free(ump, M_UFSMNT); + mp->mnt_data = (qaddr_t)0; + } + return (error); +} + +/* + * Sanity checks for old file systems. + * + * XXX - goes away some day. + */ +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)) + 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. + */ +ffs_flushfiles(mp, flags, p) + register struct mount *mp; + int flags; + struct proc *p; +{ + extern int doforce; + register struct ufsmount *ump; + int i, error; + + if (!doforce) + flags &= ~FORCECLOSE; + ump = VFSTOUFS(mp); +#ifdef QUOTA + if (mp->mnt_flag & MNT_QUOTA) { + if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) + 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 = (fs->fs_dsize * (100 - fs->fs_minfree) / 100) - + (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) { + bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); + bcopy(mp->mnt_stat.f_mntfromname, sbp->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; +{ + register struct vnode *vp; + register struct inode *ip; + register struct ufsmount *ump = VFSTOUFS(mp); + register struct fs *fs; + int error, allerror = 0; + + fs = ump->um_fs; + /* + * Write back modified superblock. + * Consistency check that the superblock + * is still in the buffer cache. + */ + if (fs->fs_fmod != 0) { + if (fs->fs_ronly != 0) { /* XXX */ + printf("fs = %s\n", fs->fs_fsmnt); + panic("update: rofs mod"); + } + fs->fs_fmod = 0; + fs->fs_time = time.tv_sec; + allerror = ffs_cgupdate(ump, waitfor); + } + /* + * Write back each (modified) inode. + */ +loop: + for (vp = mp->mnt_vnodelist.lh_first; + vp != NULL; + vp = vp->v_mntvnodes.le_next) { + /* + * 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; + if (VOP_ISLOCKED(vp)) + continue; + ip = VTOI(vp); + if ((ip->i_flag & + (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && + vp->v_dirtyblkhd.lh_first == NULL) + continue; + if (vget(vp, 1)) + goto loop; + if (error = VOP_FSYNC(vp, cred, waitfor, p)) + allerror = error; + vput(vp); + } + /* + * Force stale file system control information to be flushed. + */ + if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) + allerror = error; +#ifdef QUOTA + qsync(mp); +#endif + 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; +{ + register struct fs *fs; + register struct inode *ip; + struct ufsmount *ump; + struct buf *bp; + struct vnode *vp; + dev_t dev; + int i, type, error; + + ump = VFSTOUFS(mp); + dev = ump->um_dev; + if ((*vpp = ufs_ihashget(dev, ino)) != NULL) + return (0); + + /* Allocate a new vnode/inode. */ + if (error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) { + *vpp = NULL; + return (error); + } + type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */ + MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK); + bzero((caddr_t)ip, 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 + 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); + + /* Read in the disk contents for the inode, copy into the inode. */ + if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), + (int)fs->fs_bsize, NOCRED, &bp)) { + /* + * 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); + } + ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino)); + brelse(bp); + + /* + * Initialize the vnode from the inode, check for aliases. + * Note that the underlying vnode may have changed. + */ + if (error = ufs_vinit(mp, ffs_specop_p, FFS_FIFOOPS, &vp)) { + 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) { + if (++nextgennumber < (u_long)time.tv_sec) + nextgennumber = time.tv_sec; + ip->i_gen = nextgennumber; + 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, nam, vpp, exflagsp, credanonp) + register struct mount *mp; + struct fid *fhp; + struct mbuf *nam; + struct vnode **vpp; + int *exflagsp; + struct ucred **credanonp; +{ + 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_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); +} + +/* + * Vnode pointer to File handle + */ +/* ARGSUSED */ +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_gen; + return (0); +} + +/* + * Write a superblock and associated information back to disk. + */ +int +ffs_sbupdate(mp, waitfor) + struct ufsmount *mp; + int waitfor; +{ + register struct fs *dfs, *fs = mp->um_fs; + register struct buf *bp; + int i, error = 0; + + bp = getblk(mp->um_devvp, SBOFF >> (fs->fs_fshift - fs->fs_fsbtodb), + (int)fs->fs_sbsize, 0, 0); + bcopy((caddr_t)fs, bp->b_data, (u_int)fs->fs_sbsize); + /* Restore compatibility to old file systems. 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) + 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); + bcopy(space, bp->b_data, (u_int)size); + space += size; + if (waitfor == MNT_WAIT) + error = bwrite(bp); + else + bawrite(bp); + } + if (!allerror && error) + allerror = error; + return (allerror); +} |