2 * Copyright 2000 Hans Reiser
3 * See README for licensing and copyright details
5 * Ported to FreeBSD by Jean-Sébastien Pédron <jspedron@club-internet.fr>
10 #include <gnu/fs/reiserfs/reiserfs_fs.h>
12 const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
13 const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
14 const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
17 * Default recommended I/O size is 128k. There might be broken
18 * applications that are confused by this. Use nolargeio mount option to
19 * get usual i/o size = PAGE_SIZE.
21 int reiserfs_default_io_size = 128 * 1024;
23 static vfs_cmount_t reiserfs_cmount;
24 static vfs_fhtovp_t reiserfs_fhtovp;
25 static vfs_mount_t reiserfs_mount;
26 static vfs_root_t reiserfs_root;
27 static vfs_statfs_t reiserfs_statfs;
28 static vfs_unmount_t reiserfs_unmount;
30 static int reiserfs_mountfs(struct vnode *devvp, struct mount *mp,
32 static void load_bitmap_info_data(struct reiserfs_sb_info *sbi,
33 struct reiserfs_bitmap_info *bi);
34 static int read_bitmaps(struct reiserfs_mount *rmp);
35 static int read_old_bitmaps(struct reiserfs_mount *rmp);
36 static int read_super_block(struct reiserfs_mount *rmp, int offset);
37 static hashf_t hash_function(struct reiserfs_mount *rmp);
39 static int get_root_node(struct reiserfs_mount *rmp,
40 struct reiserfs_node **root);
41 uint32_t find_hash_out(struct reiserfs_mount *rmp);
43 MALLOC_DEFINE(M_REISERFSMNT, "reiserfs_mount", "ReiserFS mount structure");
44 MALLOC_DEFINE(M_REISERFSPATH, "reiserfs_path", "ReiserFS path structure");
45 MALLOC_DEFINE(M_REISERFSNODE, "reiserfs_node", "ReiserFS vnode private part");
47 /* -------------------------------------------------------------------
49 * -------------------------------------------------------------------*/
52 reiserfs_cmount(struct mntarg *ma, void *data, uint64_t flags)
54 struct reiserfs_args args;
55 struct export_args exp;
58 error = copyin(data, &args, sizeof(args));
61 vfs_oexport_conv(&args.export, &exp);
63 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
64 ma = mount_arg(ma, "export", &exp, sizeof(exp));
66 error = kernel_mount(ma, flags);
75 reiserfs_mount(struct mount *mp)
82 struct vfsoptlist *opts;
83 struct reiserfs_mount *rmp;
84 struct reiserfs_sb_info *sbi;
85 struct nameidata nd, *ndp = &nd;
89 if (!(mp->mnt_flag & MNT_RDONLY))
92 /* Get the new options passed to mount */
93 opts = mp->mnt_optnew;
95 /* `fspath' contains the mount point (eg. /mnt/linux); REQUIRED */
96 vfs_getopt(opts, "fspath", (void **)&path, NULL);
97 reiserfs_log(LOG_INFO, "mount point is `%s'\n", path);
99 /* `from' contains the device name (eg. /dev/ad0s1); REQUIRED */
101 error = vfs_getopt(opts, "from", (void **)&fspec, &len);
102 if (!error && fspec[len - 1] != '\0')
104 reiserfs_log(LOG_INFO, "device is `%s'\n", fspec);
106 /* Handle MNT_UPDATE (mp->mnt_flag) */
107 if (mp->mnt_flag & MNT_UPDATE) {
108 /* For now, only NFS export is supported. */
109 if (vfs_flagopt(opts, "export", NULL, 0))
113 /* Not an update, or updating the name: look up the name
114 * and verify that it refers to a sensible disk device. */
118 NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
119 if ((error = namei(ndp)) != 0)
121 NDFREE(ndp, NDF_ONLY_PNBUF);
124 if (!vn_isdisk(devvp, &error)) {
129 /* If mount by non-root, then verify that user has necessary
130 * permissions on the device. */
132 if ((mp->mnt_flag & MNT_RDONLY) == 0)
134 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
136 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
142 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
143 error = reiserfs_mountfs(devvp, mp, td);
145 /* TODO Handle MNT_UPDATE */
155 rmp = VFSTOREISERFS(mp);
156 sbi = rmp->rm_reiserfs;
159 * Note that this strncpy() is ok because of a check at the start
160 * of reiserfs_mount().
162 reiserfs_log(LOG_DEBUG, "prepare statfs data\n");
163 (void)copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
164 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
165 (void)reiserfs_statfs(mp, &mp->mnt_stat);
167 reiserfs_log(LOG_DEBUG, "done\n");
172 * Unmount system call
175 reiserfs_unmount(struct mount *mp, int mntflags)
177 int error, flags = 0;
178 struct reiserfs_mount *rmp;
179 struct reiserfs_sb_info *sbi;
181 reiserfs_log(LOG_DEBUG, "get private data\n");
182 rmp = VFSTOREISERFS(mp);
183 sbi = rmp->rm_reiserfs;
185 /* Flangs handling */
186 reiserfs_log(LOG_DEBUG, "handle mntflags\n");
187 if (mntflags & MNT_FORCE)
190 /* Flush files -> vflush */
191 reiserfs_log(LOG_DEBUG, "flush vnodes\n");
192 if ((error = vflush(mp, 0, flags, curthread)))
195 /* XXX Super block update */
198 if (SB_AP_BITMAP(sbi)) {
200 reiserfs_log(LOG_DEBUG,
201 "release bitmap buffers (total: %d)\n",
203 for (i = 0; i < SB_BMAP_NR(sbi); i++) {
204 if (SB_AP_BITMAP(sbi)[i].bp_data) {
205 free(SB_AP_BITMAP(sbi)[i].bp_data,
207 SB_AP_BITMAP(sbi)[i].bp_data = NULL;
211 reiserfs_log(LOG_DEBUG, "free bitmaps structure\n");
212 free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
213 SB_AP_BITMAP(sbi) = NULL;
217 reiserfs_log(LOG_DEBUG, "free super block data\n");
218 free(sbi->s_rs, M_REISERFSMNT);
223 reiserfs_log(LOG_DEBUG, "close device\n");
224 #if defined(si_mountpoint)
225 rmp->rm_devvp->v_rdev->si_mountpoint = NULL;
230 g_vfs_close(rmp->rm_cp);
233 vrele(rmp->rm_devvp);
234 dev_rel(rmp->rm_dev);
237 reiserfs_log(LOG_DEBUG, "free sbi\n");
238 free(sbi, M_REISERFSMNT);
239 sbi = rmp->rm_reiserfs = NULL;
242 reiserfs_log(LOG_DEBUG, "free rmp\n");
243 free(rmp, M_REISERFSMNT);
249 mp->mnt_flag &= ~MNT_LOCAL;
252 reiserfs_log(LOG_DEBUG, "done\n");
257 * Return the root of a filesystem.
260 reiserfs_root(struct mount *mp, int flags, struct vnode **vpp)
264 struct cpu_key rootkey;
266 rootkey.on_disk_key.k_dir_id = REISERFS_ROOT_PARENT_OBJECTID;
267 rootkey.on_disk_key.k_objectid = REISERFS_ROOT_OBJECTID;
269 error = reiserfs_iget(mp, &rootkey, &vp, curthread);
280 reiserfs_statfs(struct mount *mp, struct statfs *sbp)
282 struct reiserfs_mount *rmp;
283 struct reiserfs_sb_info *sbi;
284 struct reiserfs_super_block *rs;
286 reiserfs_log(LOG_DEBUG, "get private data\n");
287 rmp = VFSTOREISERFS(mp);
288 sbi = rmp->rm_reiserfs;
291 reiserfs_log(LOG_DEBUG, "fill statfs structure\n");
292 sbp->f_bsize = sbi->s_blocksize;
293 sbp->f_iosize = sbp->f_bsize;
294 sbp->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
295 sbp->f_bfree = sb_free_blocks(rs);
296 sbp->f_bavail = sbp->f_bfree;
299 reiserfs_log(LOG_DEBUG, " block size = %ju\n",
300 (intmax_t)sbp->f_bsize);
301 reiserfs_log(LOG_DEBUG, " IO size = %ju\n",
302 (intmax_t)sbp->f_iosize);
303 reiserfs_log(LOG_DEBUG, " block count = %ju\n",
304 (intmax_t)sbp->f_blocks);
305 reiserfs_log(LOG_DEBUG, " free blocks = %ju\n",
306 (intmax_t)sbp->f_bfree);
307 reiserfs_log(LOG_DEBUG, " avail blocks = %ju\n",
308 (intmax_t)sbp->f_bavail);
309 reiserfs_log(LOG_DEBUG, "...done\n");
311 if (sbp != &mp->mnt_stat) {
312 reiserfs_log(LOG_DEBUG, "copying monut point info\n");
313 sbp->f_type = mp->mnt_vfc->vfc_typenum;
314 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
315 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
316 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
317 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
318 reiserfs_log(LOG_DEBUG, " mount from: %s\n",
320 reiserfs_log(LOG_DEBUG, " mount on: %s\n",
322 reiserfs_log(LOG_DEBUG, "...done\n");
329 * File handle to vnode
331 * Have to be really careful about stale file handles:
332 * - check that the inode key is valid
333 * - call ffs_vget() to get the locked inode
334 * - check for an unallocated inode (i_mode == 0)
335 * - check that the given client host has export rights and return
336 * those rights via. exflagsp and credanonp
339 reiserfs_fhtovp(struct mount *mp, struct fid *fhp, int flags,
346 struct reiserfs_node *ip;
347 struct reiserfs_sb_info *sbi;
348 struct thread *td = curthread;
350 rfhp = (struct rfid *)fhp;
351 sbi = VFSTOREISERFS(mp)->rm_reiserfs;
353 /* Check that the key is valid */
354 if (rfhp->rfid_dirid < REISERFS_ROOT_PARENT_OBJECTID &&
355 rfhp->rfid_objectid < REISERFS_ROOT_OBJECTID)
358 reiserfs_log(LOG_DEBUG,
359 "file handle key is (dirid=%d, objectid=%d)\n",
360 rfhp->rfid_dirid, rfhp->rfid_objectid);
361 key.on_disk_key.k_dir_id = rfhp->rfid_dirid;
362 key.on_disk_key.k_objectid = rfhp->rfid_objectid;
364 reiserfs_log(LOG_DEBUG, "read this inode\n");
365 error = reiserfs_iget(mp, &key, &nvp, td);
371 reiserfs_log(LOG_DEBUG, "check validity\n");
373 if (ip->i_mode == 0 || ip->i_generation != rfhp->rfid_gen) {
379 reiserfs_log(LOG_DEBUG, "return it\n");
384 /* -------------------------------------------------------------------
385 * Functions for the journal
386 * -------------------------------------------------------------------*/
389 is_reiserfs_3_5(struct reiserfs_super_block *rs)
392 return (!strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
393 strlen(reiserfs_3_5_magic_string)));
397 is_reiserfs_3_6(struct reiserfs_super_block *rs)
400 return (!strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
401 strlen(reiserfs_3_6_magic_string)));
405 is_reiserfs_jr(struct reiserfs_super_block *rs)
408 return (!strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
409 strlen(reiserfs_jr_magic_string)));
413 is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
416 return ((is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
417 is_reiserfs_jr(rs)));
420 /* -------------------------------------------------------------------
422 * -------------------------------------------------------------------*/
425 * Common code for mount and mountroot
428 reiserfs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
430 int error, old_format = 0;
431 struct reiserfs_mount *rmp;
432 struct reiserfs_sb_info *sbi;
433 struct reiserfs_super_block *rs;
436 struct g_consumer *cp;
439 //ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
445 error = g_vfs_open(devvp, &cp, "reiserfs", /* read-only */ 0);
448 VOP_UNLOCK(devvp, 0);
454 bo = &devvp->v_bufobj;
456 bo->bo_ops = g_vfs_bufops;
458 if (devvp->v_rdev->si_iosize_max != 0)
459 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
460 if (mp->mnt_iosize_max > MAXPHYS)
461 mp->mnt_iosize_max = MAXPHYS;
466 /* rmp contains any information about this specific mount */
467 rmp = malloc(sizeof *rmp, M_REISERFSMNT, M_WAITOK | M_ZERO);
472 sbi = malloc(sizeof *sbi, M_REISERFSMNT, M_WAITOK | M_ZERO);
477 rmp->rm_reiserfs = sbi;
479 rmp->rm_devvp = devvp;
481 rmp->rm_bo = &devvp->v_bufobj;
484 /* Set default values for options: non-aggressive tails */
485 REISERFS_SB(sbi)->s_mount_opt = (1 << REISERFS_SMALLTAIL);
486 REISERFS_SB(sbi)->s_rd_only = 1;
487 REISERFS_SB(sbi)->s_devvp = devvp;
489 /* Read the super block */
490 if ((error = read_super_block(rmp, REISERFS_OLD_DISK_OFFSET)) == 0) {
491 /* The read process succeeded, it's an old format */
493 } else if ((error = read_super_block(rmp, REISERFS_DISK_OFFSET)) != 0) {
494 reiserfs_log(LOG_ERR, "can not find a ReiserFS filesystem\n");
498 rs = SB_DISK_SUPER_BLOCK(sbi);
501 * Let's do basic sanity check to verify that underlying device is
502 * not smaller than the filesystem. If the check fails then abort and
503 * scream, because bad stuff will happen otherwise.
506 if (s->s_bdev && s->s_bdev->bd_inode &&
507 i_size_read(s->s_bdev->bd_inode) <
508 sb_block_count(rs) * sb_blocksize(rs)) {
509 reiserfs_log(LOG_ERR,
510 "reiserfs: filesystem cannot be mounted because it is "
511 "bigger than the device.\n");
512 reiserfs_log(LOG_ERR, "reiserfs: you may need to run fsck "
513 "rr may be you forgot to reboot after fdisk when it "
520 * XXX This is from the original Linux code, but why affecting 2 values
521 * to the same variable?
523 sbi->s_mount_state = SB_REISERFS_STATE(sbi);
524 sbi->s_mount_state = REISERFS_VALID_FS;
526 if ((error = (old_format ?
527 read_old_bitmaps(rmp) : read_bitmaps(rmp)))) {
528 reiserfs_log(LOG_ERR, "unable to read bitmap\n");
532 /* Make data=ordered the default */
533 if (!reiserfs_data_log(sbi) && !reiserfs_data_ordered(sbi) &&
534 !reiserfs_data_writeback(sbi)) {
535 REISERFS_SB(sbi)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
538 if (reiserfs_data_log(sbi)) {
539 reiserfs_log(LOG_INFO, "using journaled data mode\n");
540 } else if (reiserfs_data_ordered(sbi)) {
541 reiserfs_log(LOG_INFO, "using ordered data mode\n");
543 reiserfs_log(LOG_INFO, "using writeback data mode\n");
546 /* TODO Not yet supported */
548 if(journal_init(sbi, jdev_name, old_format, commit_max_age)) {
549 reiserfs_log(LOG_ERR, "unable to initialize journal space\n");
552 jinit_done = 1 ; /* once this is set, journal_release must
553 be called if we error out of the mount */
556 if (reread_meta_blocks(sbi)) {
557 reiserfs_log(LOG_ERR,
558 "unable to reread meta blocks after journal init\n");
563 /* Define and initialize hash function */
564 sbi->s_hash_function = hash_function(rmp);
566 if (sbi->s_hash_function == NULL) {
567 reiserfs_log(LOG_ERR, "couldn't determined hash function\n");
572 if (is_reiserfs_3_5(rs) ||
573 (is_reiserfs_jr(rs) && SB_VERSION(sbi) == REISERFS_VERSION_1))
574 bit_set(&(sbi->s_properties), REISERFS_3_5);
576 bit_set(&(sbi->s_properties), REISERFS_3_6);
579 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
580 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
582 mp->mnt_flag |= MNT_LOCAL;
583 mp->mnt_kern_flag |= MNTK_MPSAFE;
585 #if defined(si_mountpoint)
586 devvp->v_rdev->si_mountpoint = mp;
592 reiserfs_log(LOG_INFO, "*** error during mount ***\n");
594 if (SB_AP_BITMAP(sbi)) {
596 for (i = 0; i < SB_BMAP_NR(sbi); i++) {
597 if (!SB_AP_BITMAP(sbi)[i].bp_data)
599 free(SB_AP_BITMAP(sbi)[i].bp_data,
602 free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
606 free(sbi->s_rs, M_REISERFSMNT);
620 free(sbi, M_REISERFSMNT);
622 free(rmp, M_REISERFSMNT);
628 * Read the super block
631 read_super_block(struct reiserfs_mount *rmp, int offset)
635 struct reiserfs_super_block *rs;
636 struct reiserfs_sb_info *sbi;
637 uint16_t fs_blocksize;
639 if (offset == REISERFS_OLD_DISK_OFFSET) {
640 reiserfs_log(LOG_DEBUG,
641 "reiserfs/super: read old format super block\n");
643 reiserfs_log(LOG_DEBUG,
644 "reiserfs/super: read new format super block\n");
647 /* Read the super block */
648 if ((error = bread(rmp->rm_devvp, offset * btodb(REISERFS_BSIZE),
649 REISERFS_BSIZE, NOCRED, &bp)) != 0) {
650 reiserfs_log(LOG_ERR, "can't read device\n");
654 /* Get it from the buffer data */
655 rs = (struct reiserfs_super_block *)bp->b_data;
656 if (!is_any_reiserfs_magic_string(rs)) {
661 fs_blocksize = sb_blocksize(rs);
665 if (fs_blocksize <= 0) {
666 reiserfs_log(LOG_ERR, "unexpected null block size");
670 /* Read the super block (for double check)
671 * We can't read the same blkno with a different size: it causes
672 * panic() if INVARIANTS is set. So we keep REISERFS_BSIZE */
673 if ((error = bread(rmp->rm_devvp,
674 offset * REISERFS_BSIZE / fs_blocksize * btodb(fs_blocksize),
675 REISERFS_BSIZE, NOCRED, &bp)) != 0) {
676 reiserfs_log(LOG_ERR, "can't reread the super block\n");
680 rs = (struct reiserfs_super_block *)bp->b_data;
681 if (sb_blocksize(rs) != fs_blocksize) {
682 reiserfs_log(LOG_ERR, "unexpected block size "
683 "(found=%u, expected=%u)\n",
684 sb_blocksize(rs), fs_blocksize);
689 reiserfs_log(LOG_DEBUG, "magic: `%s'\n", rs->s_v1.s_magic);
690 reiserfs_log(LOG_DEBUG, "label: `%s'\n", rs->s_label);
691 reiserfs_log(LOG_DEBUG, "block size: %6d\n", sb_blocksize(rs));
692 reiserfs_log(LOG_DEBUG, "block count: %6u\n",
693 rs->s_v1.s_block_count);
694 reiserfs_log(LOG_DEBUG, "bitmaps number: %6u\n",
697 if (rs->s_v1.s_root_block == -1) {
699 "reiserfs: Unfinished reiserfsck --rebuild-tree run "
701 "run reiserfsck --rebuild-tree and wait for a "
702 "completion. If that\n"
703 "fails, get newer reiserfsprogs package");
708 sbi = rmp->rm_reiserfs;
709 sbi->s_blocksize = fs_blocksize;
711 for (bits = 9, fs_blocksize >>= 9; fs_blocksize >>= 1; bits++)
713 sbi->s_blocksize_bits = bits;
715 /* Copy the buffer and release it */
716 sbi->s_rs = malloc(sizeof *rs, M_REISERFSMNT, M_WAITOK | M_ZERO);
718 reiserfs_log(LOG_ERR, "can not read the super block\n");
722 bcopy(rs, sbi->s_rs, sizeof(struct reiserfs_super_block));
725 if (is_reiserfs_jr(rs)) {
726 if (sb_version(rs) == REISERFS_VERSION_2)
727 reiserfs_log(LOG_INFO, "found reiserfs format \"3.6\""
728 " with non-standard journal");
729 else if (sb_version(rs) == REISERFS_VERSION_1)
730 reiserfs_log(LOG_INFO, "found reiserfs format \"3.5\""
731 " with non-standard journal");
733 reiserfs_log(LOG_ERR, "found unknown "
734 "format \"%u\" of reiserfs with non-standard magic",
740 * s_version of standard format may contain incorrect
741 * information, so we just look at the magic string
743 reiserfs_log(LOG_INFO,
744 "found reiserfs format \"%s\" with standard journal\n",
745 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
752 * load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure
754 * @sbi - superblock info for this filesystem
755 * @bi - the bitmap info to be loaded. Requires that bi->bp is valid.
757 * This routine counts how many free bits there are, finding the first
758 * zero as a side effect. Could also be implemented as a loop of
759 * test_bit() calls, or a loop of find_first_zero_bit() calls. This
760 * implementation is similar to find_first_zero_bit(), but doesn't
761 * return after it finds the first bit. Should only be called on fs
762 * mount, but should be fairly efficient anyways.
764 * bi->first_zero_hint is considered unset if it == 0, since the bitmap
765 * itself will invariably occupt block 0 represented in the bitmap. The
766 * only exception to this is when free_count also == 0, since there will
767 * be no free blocks at all.
770 load_bitmap_info_data(struct reiserfs_sb_info *sbi,
771 struct reiserfs_bitmap_info *bi)
775 cur = (unsigned long *)bi->bp_data;
776 while ((char *)cur < (bi->bp_data + sbi->s_blocksize)) {
778 * No need to scan if all 0's or all 1's.
779 * Since we're only counting 0's, we can simply ignore
783 if (bi->first_zero_hint == 0) {
784 bi->first_zero_hint =
785 ((char *)cur - bi->bp_data) << 3;
787 bi->free_count += sizeof(unsigned long) * 8;
788 } else if (*cur != ~0L) {
791 for (b = 0; b < sizeof(unsigned long) * 8; b++) {
792 if (!reiserfs_test_le_bit(b, cur)) {
794 if (bi->first_zero_hint == 0)
795 bi->first_zero_hint =
797 bi->bp_data) << 3) + b;
809 read_bitmaps(struct reiserfs_mount *rmp)
812 struct buf *bp = NULL;
813 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
815 /* Allocate memory for the table of bitmaps */
817 malloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(sbi),
818 M_REISERFSMNT, M_WAITOK | M_ZERO);
819 if (!SB_AP_BITMAP(sbi))
822 /* Read all the bitmaps */
824 bmap_nr = (REISERFS_DISK_OFFSET_IN_BYTES / sbi->s_blocksize + 1) *
825 btodb(sbi->s_blocksize);
826 i < SB_BMAP_NR(sbi); i++, bmap_nr = sbi->s_blocksize * 8 * i) {
827 SB_AP_BITMAP(sbi)[i].bp_data = malloc(sbi->s_blocksize,
828 M_REISERFSMNT, M_WAITOK | M_ZERO);
829 if (!SB_AP_BITMAP(sbi)[i].bp_data)
831 bread(rmp->rm_devvp, bmap_nr, sbi->s_blocksize, NOCRED, &bp);
832 bcopy(bp->b_data, SB_AP_BITMAP(sbi)[i].bp_data,
837 /*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
838 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);*/
841 for (i = 0; i < SB_BMAP_NR(sbi); i++) {
842 /*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
843 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
844 "bitmap block (#%lu) reading failed",
845 SB_AP_BITMAP(s)[i].bh->b_blocknr);
846 for (i = 0; i < SB_BMAP_NR(s); i++)
847 brelse(SB_AP_BITMAP(s)[i].bh);
848 vfree(SB_AP_BITMAP(s));
849 SB_AP_BITMAP(s) = NULL;
852 load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
853 reiserfs_log(LOG_DEBUG,
854 "%d free blocks (starting at block %ld)\n",
855 SB_AP_BITMAP(sbi)[i].free_count,
856 (long)SB_AP_BITMAP(sbi)[i].first_zero_hint);
862 // TODO Not supported
864 read_old_bitmaps(struct reiserfs_mount *rmp)
870 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
871 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(sbi);
873 /* First of bitmap blocks */
874 int bmp1 = (REISERFS_OLD_DISK_OFFSET / sbi->s_blocksize) *
875 btodb(sbi->s_blocksize);
877 /* Read true bitmap */
879 malloc(sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs),
880 M_REISERFSMNT, M_WAITOK | M_ZERO);
881 if (!SB_AP_BITMAP(sbi))
884 for (i = 0; i < sb_bmap_nr(rs); i ++) {
885 SB_AP_BITMAP(sbi)[i].bp = getblk(rmp->rm_devvp,
886 (bmp1 + i) * btodb(sbi->s_blocksize), sbi->s_blocksize, 0, 0, 0);
887 if (!SB_AP_BITMAP(sbi)[i].bp)
889 load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
896 /* -------------------------------------------------------------------
897 * Hash detection stuff
898 * -------------------------------------------------------------------*/
901 get_root_node(struct reiserfs_mount *rmp, struct reiserfs_node **root)
903 struct reiserfs_node *ip;
904 struct reiserfs_iget_args args;
906 /* Allocate the node structure */
907 reiserfs_log(LOG_DEBUG, "malloc(struct reiserfs_node)\n");
908 ip = malloc(sizeof(struct reiserfs_node),
909 M_REISERFSNODE, M_WAITOK | M_ZERO);
911 /* Fill the structure */
912 reiserfs_log(LOG_DEBUG, "filling *ip\n");
913 ip->i_dev = rmp->rm_dev;
914 ip->i_number = REISERFS_ROOT_OBJECTID;
915 ip->i_ino = REISERFS_ROOT_PARENT_OBJECTID;
916 ip->i_reiserfs = rmp->rm_reiserfs;
919 args.objectid = ip->i_number;
920 args.dirid = ip->i_ino;
921 reiserfs_log(LOG_DEBUG, "call reiserfs_read_locked_inode("
922 "objectid=%d,dirid=%d)\n", args.objectid, args.dirid);
923 reiserfs_read_locked_inode(ip, &args);
925 ip->i_devvp = rmp->rm_devvp;
926 //XXX VREF(ip->i_devvp); Is it necessary ?
933 * If root directory is empty - we set default - Yura's - hash and warn
935 * FIXME: we look for only one name in a directory. If tea and yura both
936 * have the same value - we ask user to send report to the mailing list
938 uint32_t find_hash_out(struct reiserfs_mount *rmp)
942 INITIALIZE_PATH(path);
943 struct reiserfs_node *ip;
944 struct reiserfs_sb_info *sbi;
945 struct reiserfs_dir_entry de;
946 uint32_t hash = DEFAULT_HASH;
948 get_root_node(rmp, &ip);
952 sbi = rmp->rm_reiserfs;
955 uint32_t teahash, r5hash, yurahash;
957 reiserfs_log(LOG_DEBUG, "make_cpu_key\n");
958 make_cpu_key(&key, ip, ~0, TYPE_DIRENTRY, 3);
959 reiserfs_log(LOG_DEBUG, "search_by_entry_key for "
960 "key(objectid=%d,dirid=%d)\n",
961 key.on_disk_key.k_objectid, key.on_disk_key.k_dir_id);
962 retval = search_by_entry_key(sbi, &key, &path, &de);
963 if (retval == IO_ERROR) {
967 if (retval == NAME_NOT_FOUND)
970 reiserfs_log(LOG_DEBUG, "name found\n");
972 set_de_name_and_namelen(&de);
974 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
975 /* Allow override in this case */
976 if (reiserfs_rupasov_hash(sbi)) {
979 reiserfs_log(LOG_DEBUG,
980 "FS seems to be empty, autodetect "
981 "is using the default hash");
985 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
986 teahash = GET_HASH_VALUE(keyed_hash(de.de_name,
988 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
989 if (((teahash == r5hash) &&
991 deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)) ||
992 ((teahash == yurahash) &&
995 deh_offset(&(de.de_deh[de.de_entry_num]))))) ||
996 ((r5hash == yurahash) &&
999 deh_offset(&(de.de_deh[de.de_entry_num])))))) {
1000 reiserfs_log(LOG_ERR,
1001 "unable to automatically detect hash "
1002 "function. Please mount with -o "
1003 "hash={tea,rupasov,r5}");
1009 deh_offset(&(de.de_deh[de.de_entry_num]))) == yurahash) {
1010 reiserfs_log(LOG_DEBUG, "detected YURA hash\n");
1012 } else if (GET_HASH_VALUE(
1013 deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) {
1014 reiserfs_log(LOG_DEBUG, "detected TEA hash\n");
1016 } else if (GET_HASH_VALUE(
1017 deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) {
1018 reiserfs_log(LOG_DEBUG, "detected R5 hash\n");
1021 reiserfs_log(LOG_WARNING, "unrecognised hash function");
1030 /* Finds out which hash names are sorted with */
1032 what_hash(struct reiserfs_mount *rmp)
1035 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
1038 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(sbi));
1041 * reiserfs_hash_detect() == true if any of the hash mount options
1042 * were used. We must check them to make sure the user isn't using a
1045 if (code == UNSET_HASH || reiserfs_hash_detect(sbi))
1046 code = find_hash_out(rmp);
1048 if (code != UNSET_HASH && reiserfs_hash_detect(sbi)) {
1050 * Detection has found the hash, and we must check against
1053 if (reiserfs_rupasov_hash(sbi) && code != YURA_HASH) {
1054 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1055 "unable to force rupasov hash",
1056 reiserfs_hashname(code));
1058 } else if (reiserfs_tea_hash(sbi) && code != TEA_HASH) {
1059 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1060 "unable to force tea hash",
1061 reiserfs_hashname(code));
1063 } else if (reiserfs_r5_hash(sbi) && code != R5_HASH) {
1064 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1065 "unable to force r5 hash",
1066 reiserfs_hashname(code));
1071 * Find_hash_out was not called or could not determine
1074 if (reiserfs_rupasov_hash(sbi)) {
1076 } else if (reiserfs_tea_hash(sbi)) {
1078 } else if (reiserfs_r5_hash(sbi)) {
1083 /* TODO Not supported yet */
1085 /* If we are mounted RW, and we have a new valid hash code, update
1087 if (code != UNSET_HASH &&
1088 !(s->s_flags & MS_RDONLY) &&
1089 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1090 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1097 /* Return pointer to appropriate function */
1099 hash_function(struct reiserfs_mount *rmp)
1102 switch (what_hash(rmp)) {
1104 reiserfs_log(LOG_INFO, "using tea hash to sort names\n");
1105 return (keyed_hash);
1107 reiserfs_log(LOG_INFO, "using rupasov hash to sort names\n");
1110 reiserfs_log(LOG_INFO, "using r5 hash to sort names\n");
1117 /* -------------------------------------------------------------------
1119 * -------------------------------------------------------------------*/
1121 static struct vfsops reiser_vfsops = {
1122 .vfs_cmount = reiserfs_cmount,
1123 .vfs_mount = reiserfs_mount,
1124 .vfs_unmount = reiserfs_unmount,
1125 //.vfs_checkexp = reiserfs_checkexp,
1126 //.vfs_extattrctl = reiserfs_extattrctl,
1127 .vfs_fhtovp = reiserfs_fhtovp,
1128 //.vfs_quotactl = reiserfs_quotactl,
1129 .vfs_root = reiserfs_root,
1130 //.vfs_start = reiserfs_start,
1131 .vfs_statfs = reiserfs_statfs,
1132 //.vfs_sync = reiserfs_sync,
1133 //.vfs_vget = reiserfs_vget,
1136 VFS_SET(reiser_vfsops, reiserfs, VFCF_READONLY);