2 * Copyright (c) 1989, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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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 1.27 2004/11/09 04:25:59 dillon Exp $
38 #include "opt_quota.h"
40 #include <sys/param.h>
41 #include <sys/systm.h>
43 #include <sys/namei.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 = {
90 VFS_SET(ufs_vfsops, ufs, 0);
92 extern struct vnodeopv_entry_desc ffs_vnodeop_entries[];
93 extern struct vnodeopv_entry_desc ffs_specop_entries[];
94 extern struct vnodeopv_entry_desc ffs_fifoop_entries[];
100 * Called when mounting local physical media
104 * mp mount point structure
105 * path NULL (flag for root mount!!!)
108 * p process (user credentials check [statfs])
111 * mp mount point structure
112 * path path to mount point
113 * data pointer to argument struct in user space
114 * ndp mount point namei() return (used for
115 * credentials on reload), reused to look
117 * p process (user credentials check)
120 * !0 error number (errno.h)
125 * mount point is locked
127 * mount point is locked
130 * A NULL path can be used for a flag since the mount
131 * system call will fail with EFAULT in copyinstr in
132 * namei() if it is a genuine NULL from the user.
135 ffs_mount(struct mount *mp, /* mount struct pointer */
136 char *path, /* path to mount point */
137 caddr_t data, /* arguments to FS specific mount */
138 struct thread *td) /* process requesting mount */
144 struct ufs_args args;
145 struct ufsmount *ump = 0;
147 int error, flags, ronly = 0;
151 struct vnode *rootvp;
153 KKASSERT(td->td_proc);
154 cred = td->td_proc->p_ucred;
157 * Use NULL path to flag a root mount
162 * Mounting root filesystem
166 if ((err = bdevvp(rootdev, &rootvp))) {
167 printf("ffs_mountroot: can't find rootvp\n");
171 if( ( err = ffs_mountfs(rootvp, mp, td, M_FFSNODE)) != 0) {
172 /* fs specific cleanup (if any)*/
176 goto dostatfs; /* success*/
182 * Mounting non-root filesystem or updating a filesystem
186 /* copy in user arguments*/
187 err = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
189 goto error_1; /* can't get arguments*/
192 * If updating, check whether changing from read-only to
193 * read/write; if there is no device name, that's all we do.
195 if (mp->mnt_flag & MNT_UPDATE) {
198 devvp = ump->um_devvp;
200 ronly = fs->fs_ronly; /* MNT_RELOAD might change this */
201 if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
203 * Flush any dirty data.
205 VFS_SYNC(mp, MNT_WAIT, td);
207 * Check for and optionally get rid of files open
211 if (mp->mnt_flag & MNT_FORCE)
213 if (mp->mnt_flag & MNT_SOFTDEP) {
214 err = softdep_flushfiles(mp, flags, td);
216 err = ffs_flushfiles(mp, flags, td);
220 if (!err && (mp->mnt_flag & MNT_RELOAD))
221 err = ffs_reload(mp, NULL, td);
225 if (ronly && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
227 * If upgrade to read-write by non-root, then verify
228 * that user has necessary permissions on the device.
230 if (cred->cr_uid != 0) {
231 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
232 if ((error = VOP_ACCESS(devvp, VREAD | VWRITE,
234 VOP_UNLOCK(devvp, 0, td);
237 VOP_UNLOCK(devvp, 0, td);
240 fs->fs_flags &= ~FS_UNCLEAN;
241 if (fs->fs_clean == 0) {
242 fs->fs_flags |= FS_UNCLEAN;
243 if (mp->mnt_flag & MNT_FORCE) {
245 "WARNING: %s was not properly dismounted\n",
249 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
256 /* check to see if we need to start softdep */
257 if (fs->fs_flags & FS_DOSOFTDEP) {
258 err = softdep_mount(devvp, mp, fs);
266 * Soft updates is incompatible with "async",
267 * so if we are doing softupdates stop the user
268 * from setting the async flag in an update.
269 * Softdep_mount() clears it in an initial mount
272 if (mp->mnt_flag & MNT_SOFTDEP) {
273 mp->mnt_flag &= ~MNT_ASYNC;
275 /* if not updating name...*/
276 if (args.fspec == 0) {
278 * Process export requests. Jumping to "success"
279 * will return the vfs_export() error code.
281 err = vfs_export(mp, &ump->um_export, &args.export);
287 * Not an update, or updating the name: look up the name
288 * and verify that it refers to a sensible block device.
290 NDINIT(&nd, NAMEI_LOOKUP, CNP_FOLLOW, UIO_USERSPACE, args.fspec, td);
293 /* can't get devvp!*/
297 NDFREE(&nd, NDF_ONLY_PNBUF);
300 if (!vn_isdisk(devvp, &err))
304 * If mount by non-root, then verify that user has necessary
305 * permissions on the device.
307 if (cred->cr_uid != 0) {
309 if ((mp->mnt_flag & MNT_RDONLY) == 0)
310 accessmode |= VWRITE;
311 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
312 if ((error = VOP_ACCESS(devvp, accessmode, cred, td)) != 0) {
316 VOP_UNLOCK(devvp, 0, td);
319 if (mp->mnt_flag & MNT_UPDATE) {
323 * If it's not the same vnode, or at least the same device
324 * then it's not correct. NOTE: devvp->v_rdev may be NULL
325 * since we haven't opened it, so we compare udev instead.
328 if (devvp != ump->um_devvp) {
329 if (devvp->v_udev == ump->um_devvp->v_udev) {
332 printf("cannot update mount, udev does"
333 " not match %08x vs %08x\n",
334 devvp->v_udev, ump->um_devvp->v_udev);
335 err = EINVAL; /* needs translation */
341 * Update device name only on success
344 /* Save "mounted from" info for mount point (NULL pad)*/
345 copyinstr( args.fspec,
346 mp->mnt_stat.f_mntfromname,
349 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
359 * Since this is a new mount, we want the names for
360 * the device and the mount point copied in. If an
361 * error occurs, the mountpoint is discarded by the
364 /* Save "last mounted on" info for mount point (NULL pad)*/
365 copyinstr( path, /* mount point*/
366 mp->mnt_stat.f_mntonname, /* save area*/
367 MNAMELEN - 1, /* max size*/
368 &size); /* real size*/
369 bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
371 /* Save "mounted from" info for mount point (NULL pad)*/
372 copyinstr( args.fspec, /* device name*/
373 mp->mnt_stat.f_mntfromname, /* save area*/
374 MNAMELEN - 1, /* max size*/
375 &size); /* real size*/
376 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
378 err = ffs_mountfs(devvp, mp, td, M_FFSNODE);
386 * Initialize FS stat information in mount struct; uses both
387 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
389 * This code is common to root and non-root mounts
391 (void)VFS_STATFS(mp, &mp->mnt_stat, td);
396 error_2: /* error with devvp held*/
398 /* release devvp before failing*/
401 error_1: /* no state to back out*/
404 if (!err && path && (mp->mnt_flag & MNT_UPDATE)) {
405 /* Update clean flag after changing read-onlyness. */
407 if (ronly != fs->fs_ronly) {
408 fs->fs_ronly = ronly;
409 fs->fs_clean = ronly &&
410 (fs->fs_flags & FS_UNCLEAN) == 0 ? 1 : 0;
411 ffs_sbupdate(ump, MNT_WAIT);
418 * Reload all incore data for a filesystem (used after running fsck on
419 * the root filesystem and finding things to fix). The filesystem must
420 * be mounted read-only.
422 * Things to do to update the mount:
423 * 1) invalidate all cached meta-data.
424 * 2) re-read superblock from disk.
425 * 3) re-read summary information from disk.
426 * 4) invalidate all inactive vnodes.
427 * 5) invalidate all cached file data.
428 * 6) re-read inode data for all active vnodes.
431 static int ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data);
443 ffs_reload(struct mount *mp, struct ucred *cred, struct thread *td)
448 struct fs *fs, *newfs;
449 struct partinfo dpart;
451 int i, blks, size, error;
452 struct scaninfo scaninfo;
455 if ((mp->mnt_flag & MNT_RDONLY) == 0)
458 * Step 1: invalidate all cached meta-data.
460 devvp = VFSTOUFS(mp)->um_devvp;
461 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
462 error = vinvalbuf(devvp, 0, td, 0, 0);
463 VOP_UNLOCK(devvp, 0, td);
465 panic("ffs_reload: dirty1");
469 * Only VMIO the backing device if the backing device is a real
470 * block device. See ffs_mountmfs() for more details.
472 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) {
473 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
474 vfs_object_create(devvp, td);
475 VOP_UNLOCK(devvp, 0, td);
479 * Step 2: re-read superblock from disk.
481 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, td) != 0)
484 size = dpart.disklab->d_secsize;
485 if ((error = bread(devvp, (ufs_daddr_t)(SBOFF/size), SBSIZE, &bp)) != 0)
490 newfs = (struct fs *)bp->b_data;
491 if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE ||
492 newfs->fs_bsize < sizeof(struct fs)) {
494 return (EIO); /* XXX needs translation */
496 fs = VFSTOUFS(mp)->um_fs;
498 * Copy pointer fields back into superblock before copying in XXX
499 * new superblock. These should really be in the ufsmount. XXX
500 * Note that important parameters (eg fs_ncg) are unchanged.
502 newfs->fs_csp = fs->fs_csp;
503 newfs->fs_maxcluster = fs->fs_maxcluster;
504 newfs->fs_contigdirs = fs->fs_contigdirs;
505 /* The filesystem is still read-only. */
507 bcopy(newfs, fs, (uint)fs->fs_sbsize);
508 if (fs->fs_sbsize < SBSIZE)
509 bp->b_flags |= B_INVAL;
511 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
513 /* An old fsck may have zeroed these fields, so recheck them. */
514 if (fs->fs_avgfilesize <= 0) /* XXX */
515 fs->fs_avgfilesize = AVFILESIZ; /* XXX */
516 if (fs->fs_avgfpdir <= 0) /* XXX */
517 fs->fs_avgfpdir = AFPDIR; /* XXX */
520 * Step 3: re-read summary information from disk.
522 blks = howmany(fs->fs_cssize, fs->fs_fsize);
524 for (i = 0; i < blks; i += fs->fs_frag) {
526 if (i + fs->fs_frag > blks)
527 size = (blks - i) * fs->fs_fsize;
528 error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size, &bp);
533 bcopy(bp->b_data, space, (uint)size);
534 space = (char *)space + size;
538 * We no longer know anything about clusters per cylinder group.
540 if (fs->fs_contigsumsize > 0) {
541 lp = fs->fs_maxcluster;
542 for (i = 0; i < fs->fs_ncg; i++)
543 *lp++ = fs->fs_contigsumsize;
548 scaninfo.devvp = devvp;
550 while (error == 0 && scaninfo.rescan) {
552 error = vmntvnodescan(mp, VMSC_GETVX,
553 NULL, ffs_reload_scan2, &scaninfo);
559 ffs_reload_scan2(struct mount *mp, struct vnode *vp, void *data)
561 struct scaninfo *info = data;
569 if (vrecycle(vp, info->td))
572 if (vinvalbuf(vp, 0, info->td, 0, 0))
573 panic("ffs_reload: dirty2");
575 * Step 6: re-read inode data for all active vnodes.
578 error = bread(info->devvp,
579 fsbtodb(info->fs, ino_to_fsba(info->fs, ip->i_number)),
580 (int)info->fs->fs_bsize, &bp);
585 ip->i_din = *((struct dinode *)bp->b_data +
586 ino_to_fsbo(info->fs, ip->i_number));
587 ip->i_effnlink = ip->i_nlink;
593 * Common code for mount and mountroot
596 ffs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td,
597 struct malloc_type *malloctype)
599 struct ufsmount *ump;
603 struct partinfo dpart;
605 int error, i, blks, size, ronly;
607 uint64_t maxfilesize; /* XXX */
611 * Disallow multiple mounts of the same device.
612 * Disallow mounting of a device that is currently in use
613 * Flush out any old buffers remaining from a previous use.
615 error = vfs_mountedon(devvp);
618 if (count_udev(devvp->v_udev) > 0)
620 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
621 error = vinvalbuf(devvp, V_SAVE, td, 0, 0);
622 VOP_UNLOCK(devvp, 0, td);
626 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
627 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
628 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td);
629 VOP_UNLOCK(devvp, 0, td);
634 if (dev->si_iosize_max != 0)
635 mp->mnt_iosize_max = dev->si_iosize_max;
636 if (mp->mnt_iosize_max > MAXPHYS)
637 mp->mnt_iosize_max = MAXPHYS;
640 * Only VMIO the backing device if the backing device is a real
641 * block device. This excludes the original MFS implementation.
642 * Note that it is optional that the backing device be VMIOed. This
643 * increases the opportunity for metadata caching.
645 if (devvp->v_tag != VT_MFS && vn_isdisk(devvp, NULL)) {
646 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
647 vfs_object_create(devvp, td);
648 VOP_UNLOCK(devvp, 0, td);
651 if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, proc0.p_ucred, td) != 0)
654 size = dpart.disklab->d_secsize;
658 if ((error = bread(devvp, SBLOCK, SBSIZE, &bp)) != 0)
660 fs = (struct fs *)bp->b_data;
661 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
662 fs->fs_bsize < sizeof(struct fs)) {
663 error = EINVAL; /* XXX needs translation */
667 fs->fs_flags &= ~FS_UNCLEAN;
668 if (fs->fs_clean == 0) {
669 fs->fs_flags |= FS_UNCLEAN;
670 if (ronly || (mp->mnt_flag & MNT_FORCE)) {
672 "WARNING: %s was not properly dismounted\n",
676 "WARNING: R/W mount of %s denied. Filesystem is not clean - run fsck\n",
682 /* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
683 if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
684 error = EROFS; /* needs translation */
687 ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
688 bzero((caddr_t)ump, sizeof *ump);
689 ump->um_malloctype = malloctype;
690 ump->um_i_effnlink_valid = 1;
691 ump->um_fs = malloc((u_long)fs->fs_sbsize, M_UFSMNT,
693 ump->um_blkatoff = ffs_blkatoff;
694 ump->um_truncate = ffs_truncate;
695 ump->um_update = ffs_update;
696 ump->um_valloc = ffs_valloc;
697 ump->um_vfree = ffs_vfree;
698 bcopy(bp->b_data, ump->um_fs, (uint)fs->fs_sbsize);
699 if (fs->fs_sbsize < SBSIZE)
700 bp->b_flags |= B_INVAL;
704 fs->fs_ronly = ronly;
705 size = fs->fs_cssize;
706 blks = howmany(size, fs->fs_fsize);
707 if (fs->fs_contigsumsize > 0)
708 size += fs->fs_ncg * sizeof(int32_t);
709 size += fs->fs_ncg * sizeof(uint8_t);
710 space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
712 for (i = 0; i < blks; i += fs->fs_frag) {
714 if (i + fs->fs_frag > blks)
715 size = (blks - i) * fs->fs_fsize;
716 if ((error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
718 free(fs->fs_csp, M_UFSMNT);
721 bcopy(bp->b_data, space, (uint)size);
722 space = (char *)space + size;
726 if (fs->fs_contigsumsize > 0) {
727 fs->fs_maxcluster = lp = space;
728 for (i = 0; i < fs->fs_ncg; i++)
729 *lp++ = fs->fs_contigsumsize;
732 size = fs->fs_ncg * sizeof(uint8_t);
733 fs->fs_contigdirs = (uint8_t *)space;
734 bzero(fs->fs_contigdirs, size);
735 /* Compatibility for old filesystems XXX */
736 if (fs->fs_avgfilesize <= 0) /* XXX */
737 fs->fs_avgfilesize = AVFILESIZ; /* XXX */
738 if (fs->fs_avgfpdir <= 0) /* XXX */
739 fs->fs_avgfpdir = AFPDIR; /* XXX */
740 mp->mnt_data = (qaddr_t)ump;
741 mp->mnt_stat.f_fsid.val[0] = fs->fs_id[0];
742 mp->mnt_stat.f_fsid.val[1] = fs->fs_id[1];
743 if (fs->fs_id[0] == 0 || fs->fs_id[1] == 0 ||
744 vfs_getvfs(&mp->mnt_stat.f_fsid))
746 mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
747 mp->mnt_flag |= MNT_LOCAL;
750 ump->um_devvp = devvp;
751 ump->um_nindir = fs->fs_nindir;
752 ump->um_bptrtodb = fs->fs_fsbtodb;
753 ump->um_seqinc = fs->fs_frag;
754 for (i = 0; i < MAXQUOTAS; i++)
755 ump->um_quotas[i] = NULLVP;
756 dev->si_mountpoint = mp;
760 * Set FS local "last mounted on" information (NULL pad)
762 copystr( mp->mnt_stat.f_mntonname, /* mount point*/
763 fs->fs_fsmnt, /* copy area*/
764 sizeof(fs->fs_fsmnt) - 1, /* max size*/
765 &strsize); /* real size*/
766 bzero( fs->fs_fsmnt + strsize, sizeof(fs->fs_fsmnt) - strsize);
768 if( mp->mnt_flag & MNT_ROOTFS) {
770 * Root mount; update timestamp in mount structure.
771 * this will be used by the common root mount code
772 * to update the system clock.
774 mp->mnt_time = fs->fs_time;
777 ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
778 maxfilesize = (uint64_t)0x40000000 * fs->fs_bsize - 1; /* XXX */
779 /* Enforce limit caused by vm object backing (32 bits vm_pindex_t). */
780 if (maxfilesize > (uint64_t)0x80000000u * PAGE_SIZE - 1)
781 maxfilesize = (uint64_t)0x80000000u * PAGE_SIZE - 1;
782 if (fs->fs_maxfilesize > maxfilesize) /* XXX */
783 fs->fs_maxfilesize = maxfilesize; /* XXX */
785 if ((fs->fs_flags & FS_DOSOFTDEP) &&
786 (error = softdep_mount(devvp, mp, fs)) != 0) {
787 free(fs->fs_csp, M_UFSMNT);
792 (void) ffs_sbupdate(ump, MNT_WAIT);
794 vfs_add_vnodeops(&mp->mnt_vn_ops, ffs_vnodeop_entries);
795 vfs_add_vnodeops(&mp->mnt_vn_spec_ops, ffs_specop_entries);
796 vfs_add_vnodeops(&mp->mnt_vn_fifo_ops, ffs_fifoop_entries);
800 dev->si_mountpoint = NULL;
803 VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, td);
805 free(ump->um_fs, M_UFSMNT);
807 mp->mnt_data = (qaddr_t)0;
813 * Sanity checks for old filesystems.
815 * XXX - goes away some day.
818 ffs_oldfscompat(struct fs *fs)
820 fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
821 fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
822 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
823 fs->fs_nrpos = 8; /* XXX */
824 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
827 uint64_t sizepb = fs->fs_bsize; /* XXX */
829 fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
830 for (i = 0; i < NIADDR; i++) { /* XXX */
831 sizepb *= NINDIR(fs); /* XXX */
832 fs->fs_maxfilesize += sizepb; /* XXX */
835 fs->fs_maxfilesize = (u_quad_t) 1LL << 39;
836 fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
837 fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
843 * unmount system call
846 ffs_unmount(struct mount *mp, int mntflags, struct thread *td)
848 struct ufsmount *ump;
853 if (mntflags & MNT_FORCE) {
856 if (mp->mnt_flag & MNT_SOFTDEP) {
857 if ((error = softdep_flushfiles(mp, flags, td)) != 0)
860 if ((error = ffs_flushfiles(mp, flags, td)) != 0)
865 if (fs->fs_ronly == 0) {
866 fs->fs_clean = fs->fs_flags & FS_UNCLEAN ? 0 : 1;
867 error = ffs_sbupdate(ump, MNT_WAIT);
873 ump->um_devvp->v_rdev->si_mountpoint = NULL;
875 vinvalbuf(ump->um_devvp, V_SAVE, td, 0, 0);
876 error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE, td);
878 vrele(ump->um_devvp);
880 free(fs->fs_csp, M_UFSMNT);
883 mp->mnt_data = (qaddr_t)0;
884 mp->mnt_flag &= ~MNT_LOCAL;
889 * Flush out all the files in a filesystem.
892 ffs_flushfiles(struct mount *mp, int flags, struct thread *td)
894 struct ufsmount *ump;
899 if (mp->mnt_flag & MNT_QUOTA) {
901 error = vflush(mp, 0, SKIPSYSTEM|flags);
904 /* Find out how many quota files we have open. */
905 for (i = 0; i < MAXQUOTAS; i++) {
906 if (ump->um_quotas[i] == NULLVP)
911 * Here we fall through to vflush again to ensure
912 * that we have gotten rid of all the system vnodes.
917 * Flush all the files.
919 if ((error = vflush(mp, 0, flags)) != 0)
922 * Flush filesystem metadata.
924 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
925 error = VOP_FSYNC(ump->um_devvp, MNT_WAIT, td);
926 VOP_UNLOCK(ump->um_devvp, 0, td);
931 * Get filesystem statistics.
934 ffs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
936 struct ufsmount *ump;
941 if (fs->fs_magic != FS_MAGIC)
943 sbp->f_bsize = fs->fs_fsize;
944 sbp->f_iosize = fs->fs_bsize;
945 sbp->f_blocks = fs->fs_dsize;
946 sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
947 fs->fs_cstotal.cs_nffree;
948 sbp->f_bavail = freespace(fs, fs->fs_minfree);
949 sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
950 sbp->f_ffree = fs->fs_cstotal.cs_nifree;
951 if (sbp != &mp->mnt_stat) {
952 sbp->f_type = mp->mnt_vfc->vfc_typenum;
953 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
954 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
955 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
956 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
962 * Go through the disk queues to initiate sandbagged IO;
963 * go through the inodes to write those that have been modified;
964 * initiate the writing of the super block if it has been modified.
966 * Note: we are always called with the filesystem marked `MPBUSY'.
970 static int ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data);
971 static int ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data);
974 ffs_sync(struct mount *mp, int waitfor, struct thread *td)
976 struct ufsmount *ump = VFSTOUFS(mp);
979 struct scaninfo scaninfo;
982 if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
983 printf("fs = %s\n", fs->fs_fsmnt);
984 panic("ffs_sync: rofs mod");
988 * Write back each (modified) inode.
990 scaninfo.allerror = 0;
992 scaninfo.waitfor = waitfor;
993 while (scaninfo.rescan) {
995 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT,
996 ffs_sync_scan1, ffs_sync_scan2, &scaninfo);
1000 * Force stale filesystem control information to be flushed.
1002 if (waitfor != MNT_LAZY) {
1003 if (ump->um_mountp->mnt_flag & MNT_SOFTDEP)
1004 waitfor = MNT_NOWAIT;
1005 vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY, td);
1006 if ((error = VOP_FSYNC(ump->um_devvp, waitfor, td)) != 0)
1007 scaninfo.allerror = error;
1008 VOP_UNLOCK(ump->um_devvp, 0, td);
1014 * Write back modified superblock.
1016 if (fs->fs_fmod != 0 && (error = ffs_sbupdate(ump, waitfor)) != 0)
1017 scaninfo.allerror = error;
1018 return (scaninfo.allerror);
1022 ffs_sync_scan1(struct mount *mp, struct vnode *vp, void *data)
1027 * Depend on the mount list's vnode lock to keep things stable
1028 * enough for a quick test. Since there might be hundreds of
1029 * thousands of vnodes, we cannot afford even a subroutine
1030 * call unless there's a good chance that we have work to do.
1033 /* Restart out whole search if this guy is locked
1034 * or is being reclaimed.
1036 if (vp->v_type == VNON || ((ip->i_flag &
1037 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
1038 TAILQ_EMPTY(&vp->v_dirtyblkhd))) {
1045 ffs_sync_scan2(struct mount *mp, struct vnode *vp, void *data)
1047 struct scaninfo *info = data;
1048 thread_t td = curthread; /* XXX */
1053 * We have to recheck after having obtained the vnode interlock.
1056 if (vp->v_type == VNON || ((ip->i_flag &
1057 (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 &&
1058 TAILQ_EMPTY(&vp->v_dirtyblkhd))) {
1061 if (vp->v_type != VCHR) {
1062 if ((error = VOP_FSYNC(vp, info->waitfor, td)) != 0)
1063 info->allerror = error;
1066 * We must reference the vp to prevent it from
1067 * getting ripped out from under UFS_UPDATE, since
1068 * we are not holding a vnode lock.
1070 /* UFS_UPDATE(vp, waitfor == MNT_WAIT); */
1077 * Look up a FFS dinode number to find its incore vnode, otherwise read it
1078 * in from disk. If it is in core, wait for the lock bit to clear, then
1079 * return the inode locked. Detection and handling of mount points must be
1080 * done by the calling routine.
1084 ffs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
1088 struct ufsmount *ump;
1097 if ((*vpp = ufs_ihashget(dev, ino)) != NULL) {
1102 * If this MALLOC() is performed after the getnewvnode()
1103 * it might block, leaving a vnode with a NULL v_data to be
1104 * found by ffs_sync() if a sync happens to fire right then,
1105 * which will cause a panic because ffs_sync() blindly
1106 * dereferences vp->v_data (as well it should).
1108 * XXX this may no longer be true since getnewvnode returns a
1109 * VX locked vnode now.
1111 MALLOC(ip, struct inode *, sizeof(struct inode),
1112 ump->um_malloctype, M_WAITOK);
1114 /* Allocate a new vnode/inode. */
1115 error = getnewvnode(VT_UFS, mp, mp->mnt_vn_ops, &vp,
1116 VLKTIMEOUT, LK_CANRECURSE);
1119 free(ip, ump->um_malloctype);
1122 bzero((caddr_t)ip, sizeof(struct inode));
1124 ip->i_fs = fs = ump->um_fs;
1130 for (i = 0; i < MAXQUOTAS; i++)
1131 ip->i_dquot[i] = NODQUOT;
1136 * Insert it into the inode hash table and check for a collision.
1137 * If a collision occurs, throw away the vnode and try again.
1139 if (ufs_ihashins(ip) != 0) {
1140 printf("debug: ufs ihashins collision, retrying inode %ld\n",
1141 (long)ip->i_number);
1143 free(ip, ump->um_malloctype);
1148 /* Read in the disk contents for the inode, copy into the inode. */
1149 error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
1150 (int)fs->fs_bsize, &bp);
1153 * The inode does not contain anything useful, so it would
1154 * be misleading to leave it on its hash chain. With mode
1155 * still zero, it will be unlinked and returned to the free
1163 ip->i_din = *((struct dinode *)bp->b_data + ino_to_fsbo(fs, ino));
1164 if (DOINGSOFTDEP(vp))
1165 softdep_load_inodeblock(ip);
1167 ip->i_effnlink = ip->i_nlink;
1171 * Initialize the vnode from the inode, check for aliases.
1172 * Note that the underlying vnode may have changed.
1174 error = ufs_vinit(mp, &vp);
1181 * Finish inode initialization now that aliasing has been resolved.
1183 ip->i_devvp = ump->um_devvp;
1186 * Set up a generation number for this inode if it does not
1187 * already have one. This should only happen on old filesystems.
1189 if (ip->i_gen == 0) {
1190 ip->i_gen = random() / 2 + 1;
1191 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
1192 ip->i_flag |= IN_MODIFIED;
1195 * Ensure that uid and gid are correct. This is a temporary
1196 * fix until fsck has been changed to do the update.
1198 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
1199 ip->i_uid = ip->i_din.di_ouid; /* XXX */
1200 ip->i_gid = ip->i_din.di_ogid; /* XXX */
1204 * return a VX locked and refd vnode (VX == same as normal vget()
1205 * vnode so we are ok)
1212 * File handle to vnode
1214 * Have to be really careful about stale file handles:
1215 * - check that the inode number is valid
1216 * - call ffs_vget() to get the locked inode
1217 * - check for an unallocated inode (i_mode == 0)
1218 * - check that the given client host has export rights and return
1219 * those rights via. exflagsp and credanonp
1222 ffs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
1227 ufhp = (struct ufid *)fhp;
1228 fs = VFSTOUFS(mp)->um_fs;
1229 if (ufhp->ufid_ino < ROOTINO ||
1230 ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
1232 return (ufs_fhtovp(mp, ufhp, vpp));
1236 * Vnode pointer to File handle
1240 ffs_vptofh(struct vnode *vp, struct fid *fhp)
1246 ufhp = (struct ufid *)fhp;
1247 ufhp->ufid_len = sizeof(struct ufid);
1248 ufhp->ufid_ino = ip->i_number;
1249 ufhp->ufid_gen = ip->i_gen;
1254 * Initialize the filesystem; just use ufs_init.
1257 ffs_init(struct vfsconf *vfsp)
1259 softdep_initialize();
1260 return (ufs_init(vfsp));
1264 * Write a superblock and associated information back to disk.
1267 ffs_sbupdate(struct ufsmount *mp, int waitfor)
1269 struct fs *dfs, *fs = mp->um_fs;
1273 int i, size, error, allerror = 0;
1276 * First write back the summary information.
1278 blks = howmany(fs->fs_cssize, fs->fs_fsize);
1280 for (i = 0; i < blks; i += fs->fs_frag) {
1281 size = fs->fs_bsize;
1282 if (i + fs->fs_frag > blks)
1283 size = (blks - i) * fs->fs_fsize;
1284 bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
1286 bcopy(space, bp->b_data, (uint)size);
1287 space = (char *)space + size;
1288 if (waitfor != MNT_WAIT)
1290 else if ((error = bwrite(bp)) != 0)
1294 * Now write back the superblock itself. If any errors occurred
1295 * up to this point, then fail so that the superblock avoids
1296 * being written out as clean.
1300 bp = getblk(mp->um_devvp, SBLOCK, (int)fs->fs_sbsize, 0, 0);
1302 fs->fs_time = time_second;
1303 bcopy((caddr_t)fs, bp->b_data, (uint)fs->fs_sbsize);
1304 /* Restore compatibility to old filesystems. XXX */
1305 dfs = (struct fs *)bp->b_data; /* XXX */
1306 if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
1307 dfs->fs_nrpos = -1; /* XXX */
1308 if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
1309 int32_t *lp, tmp; /* XXX */
1311 lp = (int32_t *)&dfs->fs_qbmask; /* XXX */
1312 tmp = lp[4]; /* XXX */
1313 for (i = 4; i > 0; i--) /* XXX */
1314 lp[i] = lp[i-1]; /* XXX */
1315 lp[0] = tmp; /* XXX */
1317 dfs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */
1318 if (waitfor != MNT_WAIT)
1320 else if ((error = bwrite(bp)) != 0)