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33 * @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95
34 * $FreeBSD: src/sys/ufs/ffs/ffs_vfsops.c,v 1.117.2.10 2002/06/23 22:34:52 iedowse Exp $
35 * $DragonFly: src/sys/vfs/ufs/ffs_vfsops.c,v 1.36 2006/03/24 18:35:34 dillon Exp $
38 #include "opt_quota.h"
40 #include <sys/param.h>
41 #include <sys/systm.h>
43 #include <sys/nlookup.h>
44 #include <sys/kernel.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
49 #include <sys/fcntl.h>
50 #include <sys/disklabel.h>
51 #include <sys/malloc.h>
56 #include "ufs_extern.h"
59 #include "ffs_extern.h"
62 #include <vm/vm_page.h>
63 #include <vm/vm_zone.h>
65 static MALLOC_DEFINE(M_FFSNODE, "FFS node", "FFS vnode private part");
67 static int ffs_sbupdate (struct ufsmount *, int);
68 static int ffs_reload (struct mount *,struct ucred *,struct thread *);
69 static int ffs_oldfscompat (struct fs *);
70 static int ffs_mount (struct mount *, char *, caddr_t, struct thread *);
71 static int ffs_init (struct vfsconf *);
73 static struct vfsops ufs_vfsops = {
74 .vfs_mount = ffs_mount,
75 .vfs_unmount = ffs_unmount,
77 .vfs_quotactl = ufs_quotactl,
78 .vfs_statfs = ffs_statfs,
81 .vfs_fhtovp = ffs_fhtovp,
82 .vfs_checkexp = ufs_check_export,
83 .vfs_vptofh = ffs_vptofh,
85 .vfs_uninit = ufs_uninit
88 VFS_SET(ufs_vfsops, ufs, 0);
90 extern struct vnodeopv_entry_desc ffs_vnodeop_entries[];
91 extern struct vnodeopv_entry_desc ffs_specop_entries[];
92 extern struct vnodeopv_entry_desc ffs_fifoop_entries[];
98 * Called when mounting local physical media
102 * mp mount point structure
103 * path NULL (flag for root mount!!!)
105 * p process (user credentials check [statfs])
108 * mp mount point structure
109 * path path to mount point
110 * data pointer to argument struct in user space
111 * p process (user credentials check)
114 * !0 error number (errno.h)
119 * mount point is locked
121 * mount point is locked
124 * A NULL path can be used for a flag since the mount
125 * system call will fail with EFAULT in copyinstr in
126 * nlookup() if it is a genuine NULL from the user.
129 ffs_mount(struct mount *mp, /* mount struct pointer */
130 char *path, /* path to mount point */
131 caddr_t data, /* arguments to FS specific mount */
132 struct thread *td) /* process requesting mount */
138 struct ufs_args args;
139 struct ufsmount *ump = 0;
141 int flags, ronly = 0;
144 struct nlookupdata nd;
145 struct vnode *rootvp;
147 KKASSERT(td->td_proc);
148 cred = td->td_proc->p_ucred;
152 * Use NULL path to flag a root mount
157 * Mounting root filesystem
161 if ((error = bdevvp(rootdev, &rootvp))) {
162 printf("ffs_mountroot: can't find rootvp\n");
166 if( ( error = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) {
167 /* fs specific cleanup (if any)*/
171 goto dostatfs; /* success*/
177 * Mounting non-root filesystem or updating a filesystem
181 /* copy in user arguments*/
182 error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
184 goto error_1; /* can't get arguments*/
187 * If updating, check whether changing from read-only to
188 * read/write; if there is no device name, that's all we do.
190 if (mp->mnt_flag & MNT_UPDATE) {
193 devvp = ump->um_devvp;
195 ronly = fs->fs_ronly; /* MNT_RELOAD might change this */
196 if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
198 * Flush any dirty data.
200 VFS_SYNC(mp, MNT_WAIT, td);
202 * Check for and optionally get rid of files open
206 if (mp->mnt_flag & MNT_FORCE)
208 if (mp->mnt_flag & MNT_SOFTDEP) {
209 error = softdep_flushfiles(mp, flags, td);
211 error = ffs_flushfiles(mp, flags, td);
215 if (!error && (mp->mnt_flag & MNT_RELOAD))
216 error = ffs_reload(mp, NULL, td);
220 if (ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
222 * If upgrade to read-write by non-root, then verify
223 * that user has necessary permissions on the device.
225 if (cred->cr_uid != 0) {
226 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
227 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
229 VOP_UNLOCK(devvp, 0, td);
232 VOP_UNLOCK(devvp, 0, td);
235 fs->fs_flags &= ~FS_UNCLEAN;
236 if (fs->fs_clean == 0) {
237 fs->fs_flags |= FS_UNCLEAN;
238 if (mp->mnt_flag & MNT_FORCE) {
240 "WARNING: %s was not properly dismounted\n",
244 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
251 /* check to see if we need to start softdep */
252 if (fs->fs_flags & FS_DOSOFTDEP) {
253 error = softdep_mount(devvp, mp, fs);
261 * Soft updates is incompatible with "async",
262 * so if we are doing softupdates stop the user
263 * from setting the async flag in an update.
264 * Softdep_mount() clears it in an initial mount
267 if (mp->mnt_flag & MNT_SOFTDEP) {
268 mp->mnt_flag &= ~MNT_ASYNC;
270 /* if not updating name...*/
271 if (args.fspec == 0) {
273 * Process export requests. Jumping to "success"
274 * will return the vfs_export() error code.
276 error = vfs_export(mp, &ump->um_export, &args.export);
282 * Not an update, or updating the name: look up the name
283 * and verify that it refers to a sensible block device.
286 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
288 error = nlookup(&nd);
290 error = cache_vref(nd.nl_ncp, nd.nl_cred, &devvp);
295 if (!vn_isdisk(devvp, &error))
299 * If mount by non-root, then verify that user has necessary
300 * permissions on the device.
302 if (cred->cr_uid != 0) {
304 if ((mp->mnt_flag & MNT_RDONLY) == 0)
305 accessmode |= VWRITE;
306 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
307 if ((error = VOP_ACCESS(devvp, accessmode, cred, td)) != 0) {
311 VOP_UNLOCK(devvp, 0, td);
314 if (mp->mnt_flag & MNT_UPDATE) {
318 * If it's not the same vnode, or at least the same device
319 * then it's not correct. NOTE: devvp->v_rdev may be NULL
320 * since we haven't opened it, so we compare udev instead.
323 if (devvp != ump->um_devvp) {
324 if (devvp->v_udev == ump->um_devvp->v_udev) {
327 printf("cannot update mount, udev does"
328 " not match %08x vs %08x\n",
329 devvp->v_udev, ump->um_devvp->v_udev);
330 error = EINVAL; /* needs translation */
336 * Update device name only on success
339 /* Save "mounted from" info for mount point (NULL pad)*/
340 copyinstr( args.fspec,
341 mp->mnt_stat.f_mntfromname,
344 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
353 /* Save "mounted from" info for mount point (NULL pad)*/
354 copyinstr( args.fspec, /* device name*/
355 mp->mnt_stat.f_mntfromname, /* save area*/
356 MNAMELEN - 1, /* max size*/
357 &size); /* real size*/
358 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
360 error = ffs_mountfs(devvp, mp, td, M_FFSNODE);
368 * Initialize FS stat information in mount struct; uses
369 * mp->mnt_stat.f_mntfromname.
371 * This code is common to root and non-root mounts
373 (void)VFS_STATFS(mp, &mp->mnt_stat, td);
378 error_2: /* error with devvp held*/
380 /* release devvp before failing*/
383 error_1: /* no state to back out*/
386 if (!error && path && (mp->mnt_flag & MNT_UPDATE)) {
387 /* Update clean flag after changing read-onlyness. */
389 if (ronly != fs->fs_ronly) {
390 fs->fs_ronly = ronly;
391 fs->fs_clean = ronly &&
392 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0;
393 ffs_sbupdate(ump, MNT_WAIT);
400 * Reload all incore data for a filesystem (used after running fsck on
401 * the root filesystem and finding things to fix). The filesystem must
402 * be mounted read-only.
404 * Things to do to update the mount:
405 * 1) invalidate all cached meta-data.
406 * 2) re-read superblock from disk.
407 * 3) re-read summary information from disk.
408 * 4) invalidate all inactive vnodes.
409 * 5) invalidate all cached file data.
410 * 6) re-read inode data for all active vnodes.
413 static int ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data);
425 ffs_reload(struct mount *mp, struct ucred *cred, struct thread *td)
430 struct fs *fs, *newfs;
431 struct partinfo dpart;
433 int i, blks, size, error;
434 struct scaninfo scaninfo;
437 if ((mp->mnt_flag & MNT_RDONLY) == 0)
440 * Step 1: invalidate all cached meta-data.
442 devvp = VFSTOUFS(mp)->um_devvp;
443 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
444 error = vinvalbuf(devvp, 0, td, 0, 0);
445 VOP_UNLOCK(devvp, 0, td);
447 panic("ffs_reload: dirty1");
451 * Only VMIO the backing device if the backing device is a real
452 * block device. See ffs_mountmfs() for more details.
454 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) {
455 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
456 vfs_object_create(devvp, td);
457 VOP_UNLOCK(devvp, 0, td);
461 * Step 2: re-read superblock from disk.
463 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0)
466 size = dpart.disklab->d_secsize;
467 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0) {
471 newfs = (struct fs *)bp->b_data;
472 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE ||
473 newfs->fs_bsize < sizeof(struct fs)) {
475 return (EIO); /* XXX needs translation */
477 fs = VFSTOUFS(mp)->um_fs;
479 * Copy pointer fields back into superblock before copying in XXX
480 * new superblock. These should really be in the ufsmount. XXX
481 * Note that important parameters (eg fs_ncg) are unchanged.
483 newfs->fs_csp = fs->fs_csp;
484 newfs->fs_maxcluster = fs->fs_maxcluster;
485 newfs->fs_contigdirs = fs->fs_contigdirs;
486 /* The filesystem is still read-only. */
488 bcopy(newfs, fs, (uint)fs->fs_sbsize);
489 if (fs->fs_sbsize < SBSIZE)
490 bp->b_flags |= B_INVAL;
492 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
494 /* An old fsck may have zeroed these fields, so recheck them. */
495 if (fs->fs_avgfilesize <= 0) /* XXX */
496 fs->fs_avgfilesize = AVFILESIZ; /* XXX */
497 if (fs->fs_avgfpdir <= 0) /* XXX */
498 fs->fs_avgfpdir = AFPDIR; /* XXX */
501 * Step 3: re-read summary information from disk.
503 blks = howmany(fs->fs_cssize, fs->fs_fsize);
505 for (i = 0; i < blks; i += fs->fs_frag) {
507 if (i + fs->fs_frag > blks)
508 size = (blks - i) * fs->fs_fsize;
509 error = bread(devvp, fsbtodoff(fs, fs->fs_csaddr + i), size, &bp);
514 bcopy(bp->b_data, space, (uint)size);
515 space = (char *)space + size;
519 * We no longer know anything about clusters per cylinder group.
521 if (fs->fs_contigsumsize > 0) {
522 lp = fs->fs_maxcluster;
523 for (i = 0; i < fs->fs_ncg; i++)
524 *lp++ = fs->fs_contigsumsize;
529 scaninfo.devvp = devvp;
531 while (error == 0 && scaninfo.rescan) {
533 error = vmntvnodescan(mp, VMSC_GETVX,
534 NULL, ffs_reload_scan2, &scaninfo);
540 ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data)
542 struct scaninfo *info = data;
550 if (vrecycle(vp, info->td))
553 if (vinvalbuf(vp, 0, info->td, 0, 0))
554 panic("ffs_reload: dirty2");
556 * Step 6: re-read inode data for all active vnodes.
559 error = bread(info->devvp,
560 fsbtodoff(info->fs, ino_to_fsba(info->fs, ip->i_number)),
561 (int)info->fs->fs_bsize, &bp);
566 ip->i_din = *((struct dinode *)bp->b_data +
567 ino_to_fsbo(info->fs, ip->i_number));
568 ip->i_effnlink = ip->i_nlink;
574 * Common code for mount and mountroot
577 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
578 struct malloc_type *malloctype)
580 struct ufsmount *ump;
584 struct partinfo dpart;
586 int error, i, blks, size, ronly;
588 uint64_t maxfilesize; /* XXX */
591 * Disallow multiple mounts of the same device.
592 * Disallow mounting of a device that is currently in use
593 * Flush out any old buffers remaining from a previous use.
595 error = vfs_mountedon(devvp);
598 if (count_udev(devvp->v_udev) > 0)
600 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
601 error = vinvalbuf(devvp, V_SAVE, td, 0, 0);
602 VOP_UNLOCK(devvp, 0, td);
606 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
607 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
608 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL, td);
609 VOP_UNLOCK(devvp, 0, td);
613 if (dev->si_iosize_max != 0)
614 mp->mnt_iosize_max = dev->si_iosize_max;
615 if (mp->mnt_iosize_max > MAXPHYS)
616 mp->mnt_iosize_max = MAXPHYS;
619 * Only VMIO the backing device if the backing device is a real
620 * block device. This excludes the original MFS implementation.
621 * Note that it is optional that the backing device be VMIOed. This
622 * increases the opportunity for metadata caching.
624 * This call must be made after the VOP_OPEN.
626 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) {
627 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
628 vfs_object_create(devvp, td);
629 VOP_UNLOCK(devvp, 0, td);
632 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, proc0.p_ucred, td) != 0)
635 size = dpart.disklab->d_secsize;
639 if ((error = bread(devvp, SBOFF, SBSIZE, &bp)) != 0)
641 fs = (struct fs *)bp->b_data;
642 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
643 fs->fs_bsize < sizeof(struct fs)) {
644 error = EINVAL; /* XXX needs translation */
648 fs->fs_flags &= ~FS_UNCLEAN;
649 if (fs->fs_clean == 0) {
650 fs->fs_flags |= FS_UNCLEAN;
651 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
653 "WARNING: %s was not properly dismounted\n",
657 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
663 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
664 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
665 error = EROFS; /* needs translation */
668 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
669 bzero((caddr_t)ump, sizeof *ump);
670 ump->um_malloctype = malloctype;
671 ump->um_i_effnlink_valid = 1;
672 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
674 ump->um_blkatoff = ffs_blkatoff;
675 ump->um_truncate = ffs_truncate;
676 ump->um_update = ffs_update;
677 ump->um_valloc = ffs_valloc;
678 ump->um_vfree = ffs_vfree;
679 bcopy(bp->b_data, ump->um_fs, (uint)fs->fs_sbsize);
680 if (fs->fs_sbsize < SBSIZE)
681 bp->b_flags |= B_INVAL;
685 fs->fs_ronly = ronly;
686 size = fs->fs_cssize;
687 blks = howmany(size, fs->fs_fsize);
688 if (fs->fs_contigsumsize > 0)
689 size += fs->fs_ncg * sizeof(int32_t);
690 size += fs->fs_ncg * sizeof(uint8_t);
691 space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
693 for (i = 0; i < blks; i += fs->fs_frag) {
695 if (i + fs->fs_frag > blks)
696 size = (blks - i) * fs->fs_fsize;
697 if ((error = bread(devvp, fsbtodoff(fs, fs->fs_csaddr + i),
699 free(fs->fs_csp, M_UFSMNT);
702 bcopy(bp->b_data, space, (uint)size);
703 space = (char *)space + size;
707 if (fs->fs_contigsumsize > 0) {
708 fs->fs_maxcluster = lp = space;
709 for (i = 0; i < fs->fs_ncg; i++)
710 *lp++ = fs->fs_contigsumsize;
713 size = fs->fs_ncg * sizeof(uint8_t);
714 fs->fs_contigdirs = (uint8_t *)space;
715 bzero(fs->fs_contigdirs, size);
716 /* Compatibility for old filesystems XXX */
717 if (fs->fs_avgfilesize <= 0) /* XXX */
718 fs->fs_avgfilesize = AVFILESIZ; /* XXX */
719 if (fs->fs_avgfpdir <= 0) /* XXX */
720 fs->fs_avgfpdir = AFPDIR; /* XXX */
721 mp->mnt_data = (qaddr_t)ump;
722 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
723 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
724 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
725 vfs_getvfs(&mp->mnt_stat.f_fsid))
727 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
728 mp->mnt_flag |= MNT_LOCAL;
731 ump->um_devvp = devvp;
732 ump->um_nindir = fs->fs_nindir;
733 ump->um_bptrtodb = fs->fs_fsbtodb;
734 ump->um_seqinc = fs->fs_frag;
735 for (i = 0; i < MAXQUOTAS; i++)
736 ump->um_quotas[i] = NULLVP;
737 dev->si_mountpoint = mp;
740 if( mp->mnt_flag & MNT_ROOTFS) {
742 * Root mount; update timestamp in mount structure.
743 * this will be used by the common root mount code
744 * to update the system clock.
746 mp->mnt_time = fs->fs_time;
749 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
750 maxfilesize = (uint64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */
751 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */
752 if (maxfilesize > (uint64_t)0x80000000u * PAGE_SIZE - 1)
753 maxfilesize = (uint64_t)0x80000000u * PAGE_SIZE - 1;
754 if (fs->fs_maxfilesize > maxfilesize) /* XXX */
755 fs->fs_maxfilesize = maxfilesize; /* XXX */
757 if ((fs->fs_flags & FS_DOSOFTDEP) &&
758 (error = softdep_mount(devvp, mp, fs)) != 0) {
759 free(fs->fs_csp, M_UFSMNT);
764 (void) ffs_sbupdate(ump, MNT_WAIT);
766 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, ffs_vnodeop_entries, VVF_SUPPORTS_FSMID);
767 vfs_add_vnodeops(mp, &mp->mnt_vn_spec_ops, ffs_specop_entries, VVF_SUPPORTS_FSMID);
768 vfs_add_vnodeops(mp, &mp->mnt_vn_fifo_ops, ffs_fifoop_entries, VVF_SUPPORTS_FSMID);
772 dev->si_mountpoint = NULL;
775 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td);
777 free(ump->um_fs, M_UFSMNT);
779 mp->mnt_data = (qaddr_t)0;
785 * Sanity checks for old filesystems.
787 * XXX - goes away some day.
790 ffs_oldfscompat(struct fs *fs)
792 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
793 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
794 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
795 fs->fs_nrpos = 8; /* XXX */
796 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
799 uint64_t sizepb = fs->fs_bsize; /* XXX */
801 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
802 for (i = 0; i < NIADDR; i++) { /* XXX */
803 sizepb *= NINDIR(fs); /* XXX */
804 fs->fs_maxfilesize += sizepb; /* XXX */
807 fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
808 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
809 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
815 * unmount system call
818 ffs_unmount(struct mount *mp, int mntflags, struct thread *td)
820 struct ufsmount *ump;
825 if (mntflags & MNT_FORCE) {
828 if (mp->mnt_flag & MNT_SOFTDEP) {
829 if ((error = softdep_flushfiles(mp, flags, td)) != 0)
832 if ((error = ffs_flushfiles(mp, flags, td)) != 0)
837 if (fs->fs_ronly == 0) {
838 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1;
839 error = ffs_sbupdate(ump, MNT_WAIT);
845 ump->um_devvp->v_rdev->si_mountpoint = NULL;
847 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0);
848 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, td);
850 vrele(ump->um_devvp);
852 free(fs->fs_csp, M_UFSMNT);
855 mp->mnt_data = (qaddr_t)0;
856 mp->mnt_flag &= ~MNT_LOCAL;
861 * Flush out all the files in a filesystem.
864 ffs_flushfiles(struct mount *mp, int flags, struct thread *td)
866 struct ufsmount *ump;
871 if (mp->mnt_flag & MNT_QUOTA) {
873 error = vflush(mp, 0, SKIPSYSTEM|flags);
876 /* Find out how many quota files we have open. */
877 for (i = 0; i < MAXQUOTAS; i++) {
878 if (ump->um_quotas[i] == NULLVP)
883 * Here we fall through to vflush again to ensure
884 * that we have gotten rid of all the system vnodes.
889 * Flush all the files.
891 if ((error = vflush(mp, 0, flags)) != 0)
894 * Flush filesystem metadata.
896 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
897 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td);
898 VOP_UNLOCK(ump->um_devvp, 0, td);
903 * Get filesystem statistics.
906 ffs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
908 struct ufsmount *ump;
913 if (fs->fs_magic != FS_MAGIC)
915 sbp->f_bsize = fs->fs_fsize;
916 sbp->f_iosize = fs->fs_bsize;
917 sbp->f_blocks = fs->fs_dsize;
918 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
919 fs->fs_cstotal.cs_nffree;
920 sbp->f_bavail = freespace(fs, fs->fs_minfree);
921 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
922 sbp->f_ffree = fs->fs_cstotal.cs_nifree;
923 if (sbp != &mp->mnt_stat) {
924 sbp->f_type = mp->mnt_vfc->vfc_typenum;
925 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
926 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
932 * Go through the disk queues to initiate sandbagged IO;
933 * go through the inodes to write those that have been modified;
934 * initiate the writing of the super block if it has been modified.
936 * Note: we are always called with the filesystem marked `MPBUSY'.
940 static int ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
941 static int ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
944 ffs_sync(struct mount *mp, int waitfor, struct thread *td)
946 struct ufsmount *ump = VFSTOUFS(mp);
949 struct scaninfo scaninfo;
952 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
953 printf("fs = %s\n", fs->fs_fsmnt);
954 panic("ffs_sync: rofs mod");
958 * Write back each (modified) inode.
960 scaninfo.allerror = 0;
962 scaninfo.waitfor = waitfor;
963 while (scaninfo.rescan) {
965 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT,
966 ffs_sync_scan1, ffs_sync_scan2, &scaninfo);
970 * Force stale filesystem control information to be flushed.
972 if (waitfor != MNT_LAZY) {
973 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP)
974 waitfor = MNT_NOWAIT;
975 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
976 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0)
977 scaninfo.allerror = error;
978 VOP_UNLOCK(ump->um_devvp, 0, td);
984 * Write back modified superblock.
986 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0)
987 scaninfo.allerror = error;
988 return (scaninfo.allerror);
992 ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
997 * Depend on the mount list's vnode lock to keep things stable
998 * enough for a quick test. Since there might be hundreds of
999 * thousands of vnodes, we cannot afford even a subroutine
1000 * call unless there's a good chance that we have work to do.
1003 /* Restart out whole search if this guy is locked
1004 * or is being reclaimed.
1006 if (vp->v_type == VNON || ((ip->i_flag &
1007 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
1008 RB_EMPTY(&vp->v_rbdirty_tree))) {
1015 ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
1017 struct scaninfo *info = data;
1018 thread_t td = curthread; /* XXX */
1023 * We have to recheck after having obtained the vnode interlock.
1026 if (vp->v_type == VNON || ((ip->i_flag &
1027 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
1028 RB_EMPTY(&vp->v_rbdirty_tree))) {
1031 if (vp->v_type != VCHR) {
1032 if ((error = VOP_FSYNC(vp, info->waitfor, td)) != 0)
1033 info->allerror = error;
1036 * We must reference the vp to prevent it from
1037 * getting ripped out from under UFS_UPDATE, since
1038 * we are not holding a vnode lock.
1040 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */
1047 * Look up a FFS dinode number to find its incore vnode, otherwise read it
1048 * in from disk. If it is in core, wait for the lock bit to clear, then
1049 * return the inode locked. Detection and handling of mount points must be
1050 * done by the calling routine.
1054 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
1058 struct ufsmount *ump;
1067 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) {
1072 * If this MALLOC() is performed after the getnewvnode()
1073 * it might block, leaving a vnode with a NULL v_data to be
1074 * found by ffs_sync() if a sync happens to fire right then,
1075 * which will cause a panic because ffs_sync() blindly
1076 * dereferences vp->v_data (as well it should).
1078 * XXX this may no longer be true since getnewvnode returns a
1079 * VX locked vnode now.
1081 MALLOC(ip, struct inode *, sizeof(struct inode),
1082 ump->um_malloctype, M_WAITOK);
1084 /* Allocate a new vnode/inode. */
1085 error = getnewvnode(VT_UFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE);
1088 free(ip, ump->um_malloctype);
1091 bzero((caddr_t)ip, sizeof(struct inode));
1093 ip->i_fs = fs = ump->um_fs;
1099 for (i = 0; i < MAXQUOTAS; i++)
1100 ip->i_dquot[i] = NODQUOT;
1105 * Insert it into the inode hash table and check for a collision.
1106 * If a collision occurs, throw away the vnode and try again.
1108 if (ufs_ihashins(ip) != 0) {
1109 printf("debug: ufs ihashins collision, retrying inode %ld\n",
1110 (long)ip->i_number);
1112 free(ip, ump->um_malloctype);
1117 /* Read in the disk contents for the inode, copy into the inode. */
1118 error = bread(ump->um_devvp, fsbtodoff(fs, ino_to_fsba(fs, ino)),
1119 (int)fs->fs_bsize, &bp);
1122 * The inode does not contain anything useful, so it would
1123 * be misleading to leave it on its hash chain. With mode
1124 * still zero, it will be unlinked and returned to the free
1132 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
1133 if (DOINGSOFTDEP(vp))
1134 softdep_load_inodeblock(ip);
1136 ip->i_effnlink = ip->i_nlink;
1140 * Initialize the vnode from the inode, check for aliases.
1141 * Note that the underlying vnode may have changed.
1143 error = ufs_vinit(mp, &vp);
1150 * Finish inode initialization now that aliasing has been resolved.
1152 ip->i_devvp = ump->um_devvp;
1155 * Set up a generation number for this inode if it does not
1156 * already have one. This should only happen on old filesystems.
1158 if (ip->i_gen == 0) {
1159 ip->i_gen = random() / 2 + 1;
1160 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1161 ip->i_flag |= IN_MODIFIED;
1164 * Ensure that uid and gid are correct. This is a temporary
1165 * fix until fsck has been changed to do the update.
1167 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
1168 ip->i_uid = ip->i_din.di_ouid; /* XXX */
1169 ip->i_gid = ip->i_din.di_ogid; /* XXX */
1173 * return a VX locked and refd vnode (VX == same as normal vget()
1174 * vnode so we are ok)
1181 * File handle to vnode
1183 * Have to be really careful about stale file handles:
1184 * - check that the inode number is valid
1185 * - call ffs_vget() to get the locked inode
1186 * - check for an unallocated inode (i_mode == 0)
1187 * - check that the given client host has export rights and return
1188 * those rights via. exflagsp and credanonp
1191 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
1196 ufhp = (struct ufid *)fhp;
1197 fs = VFSTOUFS(mp)->um_fs;
1198 if (ufhp->ufid_ino < ROOTINO ||
1199 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
1201 return (ufs_fhtovp(mp, ufhp, vpp));
1205 * Vnode pointer to File handle
1209 ffs_vptofh(struct vnode *vp, struct fid *fhp)
1215 ufhp = (struct ufid *)fhp;
1216 ufhp->ufid_len = sizeof(struct ufid);
1217 ufhp->ufid_ino = ip->i_number;
1218 ufhp->ufid_gen = ip->i_gen;
1223 * Initialize the filesystem; just use ufs_init.
1226 ffs_init(struct vfsconf *vfsp)
1228 softdep_initialize();
1229 return (ufs_init(vfsp));
1233 * Write a superblock and associated information back to disk.
1236 ffs_sbupdate(struct ufsmount *mp, int waitfor)
1238 struct fs *dfs, *fs = mp->um_fs;
1242 int i, size, error, allerror = 0;
1245 * First write back the summary information.
1247 * NOTE: the getblk is relative to the device vnode so bio1
1248 * contains the device block number.
1250 blks = howmany(fs->fs_cssize, fs->fs_fsize);
1252 for (i = 0; i < blks; i += fs->fs_frag) {
1253 size = fs->fs_bsize;
1254 if (i + fs->fs_frag > blks)
1255 size = (blks - i) * fs->fs_fsize;
1256 bp = getblk(mp->um_devvp, fsbtodoff(fs, fs->fs_csaddr + i),
1258 bcopy(space, bp->b_data, (uint)size);
1259 space = (char *)space + size;
1260 if (waitfor != MNT_WAIT)
1262 else if ((error = bwrite(bp)) != 0)
1266 * Now write back the superblock itself. If any errors occurred
1267 * up to this point, then fail so that the superblock avoids
1268 * being written out as clean.
1272 bp = getblk(mp->um_devvp, SBOFF, (int)fs->fs_sbsize, 0, 0);
1274 fs->fs_time = time_second;
1275 bcopy((caddr_t)fs, bp->b_data, (uint)fs->fs_sbsize);
1276 /* Restore compatibility to old filesystems. XXX */
1277 dfs = (struct fs *)bp->b_data; /* XXX */
1278 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
1279 dfs->fs_nrpos = -1; /* XXX */
1280 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
1281 int32_t *lp, tmp; /* XXX */
1283 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */
1284 tmp = lp[4]; /* XXX */
1285 for (i = 4; i > 0; i--) /* XXX */
1286 lp[i] = lp[i-1]; /* XXX */
1287 lp[0] = tmp; /* XXX */
1289 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */
1290 if (waitfor != MNT_WAIT)
1292 else if ((error = bwrite(bp)) != 0)