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, int 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_wither_geom_close(rmp->rm_cp->geom, ENXIO);
233 vrele(rmp->rm_devvp);
236 reiserfs_log(LOG_DEBUG, "free sbi\n");
237 free(sbi, M_REISERFSMNT);
238 sbi = rmp->rm_reiserfs = NULL;
241 reiserfs_log(LOG_DEBUG, "free rmp\n");
242 free(rmp, M_REISERFSMNT);
248 mp->mnt_flag &= ~MNT_LOCAL;
251 reiserfs_log(LOG_DEBUG, "done\n");
256 * Return the root of a filesystem.
259 reiserfs_root(struct mount *mp, int flags, struct vnode **vpp)
263 struct cpu_key rootkey;
265 rootkey.on_disk_key.k_dir_id = REISERFS_ROOT_PARENT_OBJECTID;
266 rootkey.on_disk_key.k_objectid = REISERFS_ROOT_OBJECTID;
268 error = reiserfs_iget(mp, &rootkey, &vp, curthread);
279 reiserfs_statfs(struct mount *mp, struct statfs *sbp)
281 struct reiserfs_mount *rmp;
282 struct reiserfs_sb_info *sbi;
283 struct reiserfs_super_block *rs;
285 reiserfs_log(LOG_DEBUG, "get private data\n");
286 rmp = VFSTOREISERFS(mp);
287 sbi = rmp->rm_reiserfs;
290 reiserfs_log(LOG_DEBUG, "fill statfs structure\n");
291 sbp->f_bsize = sbi->s_blocksize;
292 sbp->f_iosize = sbp->f_bsize;
293 sbp->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
294 sbp->f_bfree = sb_free_blocks(rs);
295 sbp->f_bavail = sbp->f_bfree;
298 reiserfs_log(LOG_DEBUG, " block size = %ju\n",
299 (intmax_t)sbp->f_bsize);
300 reiserfs_log(LOG_DEBUG, " IO size = %ju\n",
301 (intmax_t)sbp->f_iosize);
302 reiserfs_log(LOG_DEBUG, " block count = %ju\n",
303 (intmax_t)sbp->f_blocks);
304 reiserfs_log(LOG_DEBUG, " free blocks = %ju\n",
305 (intmax_t)sbp->f_bfree);
306 reiserfs_log(LOG_DEBUG, " avail blocks = %ju\n",
307 (intmax_t)sbp->f_bavail);
308 reiserfs_log(LOG_DEBUG, "...done\n");
310 if (sbp != &mp->mnt_stat) {
311 reiserfs_log(LOG_DEBUG, "copying monut point info\n");
312 sbp->f_type = mp->mnt_vfc->vfc_typenum;
313 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
314 (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
315 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
316 (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
317 reiserfs_log(LOG_DEBUG, " mount from: %s\n",
319 reiserfs_log(LOG_DEBUG, " mount on: %s\n",
321 reiserfs_log(LOG_DEBUG, "...done\n");
328 * File handle to vnode
330 * Have to be really careful about stale file handles:
331 * - check that the inode key is valid
332 * - call ffs_vget() to get the locked inode
333 * - check for an unallocated inode (i_mode == 0)
334 * - check that the given client host has export rights and return
335 * those rights via. exflagsp and credanonp
338 reiserfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
344 struct reiserfs_node *ip;
345 struct reiserfs_sb_info *sbi;
346 struct thread *td = curthread;
348 rfhp = (struct rfid *)fhp;
349 sbi = VFSTOREISERFS(mp)->rm_reiserfs;
351 /* Check that the key is valid */
352 if (rfhp->rfid_dirid < REISERFS_ROOT_PARENT_OBJECTID &&
353 rfhp->rfid_objectid < REISERFS_ROOT_OBJECTID)
356 reiserfs_log(LOG_DEBUG,
357 "file handle key is (dirid=%d, objectid=%d)\n",
358 rfhp->rfid_dirid, rfhp->rfid_objectid);
359 key.on_disk_key.k_dir_id = rfhp->rfid_dirid;
360 key.on_disk_key.k_objectid = rfhp->rfid_objectid;
362 reiserfs_log(LOG_DEBUG, "read this inode\n");
363 error = reiserfs_iget(mp, &key, &nvp, td);
369 reiserfs_log(LOG_DEBUG, "check validity\n");
371 if (ip->i_mode == 0 || ip->i_generation != rfhp->rfid_gen) {
377 reiserfs_log(LOG_DEBUG, "return it\n");
382 /* -------------------------------------------------------------------
383 * Functions for the journal
384 * -------------------------------------------------------------------*/
387 is_reiserfs_3_5(struct reiserfs_super_block *rs)
390 return (!strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
391 strlen(reiserfs_3_5_magic_string)));
395 is_reiserfs_3_6(struct reiserfs_super_block *rs)
398 return (!strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
399 strlen(reiserfs_3_6_magic_string)));
403 is_reiserfs_jr(struct reiserfs_super_block *rs)
406 return (!strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
407 strlen(reiserfs_jr_magic_string)));
411 is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
414 return ((is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
415 is_reiserfs_jr(rs)));
418 /* -------------------------------------------------------------------
420 * -------------------------------------------------------------------*/
423 * Common code for mount and mountroot
426 reiserfs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
428 int error, old_format = 0;
429 struct reiserfs_mount *rmp;
430 struct reiserfs_sb_info *sbi;
431 struct reiserfs_super_block *rs;
432 struct cdev *dev = devvp->v_rdev;
434 #if (__FreeBSD_version >= 600000)
435 struct g_consumer *cp;
439 //ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
441 #if (__FreeBSD_version < 600000)
443 * Disallow multiple mounts of the same device.
444 * Disallow mounting of a device that is currently in use
445 * (except for root, which might share swap device for miniroot).
446 * Flush out any old buffers remaining from a previous use.
448 if ((error = vfs_mountedon(devvp)) != 0)
450 if (vcount(devvp) > 1)
453 error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0);
455 VOP_UNLOCK(devvp, 0);
460 * Open the device in read-only, 'cause we don't support write
463 error = VOP_OPEN(devvp, FREAD, FSCRED, td, NULL);
464 VOP_UNLOCK(devvp, 0);
470 error = g_vfs_open(devvp, &cp, "reiserfs", /* read-only */ 0);
473 VOP_UNLOCK(devvp, 0);
477 bo = &devvp->v_bufobj;
479 bo->bo_ops = g_vfs_bufops;
482 if (devvp->v_rdev->si_iosize_max != 0)
483 mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
484 if (mp->mnt_iosize_max > MAXPHYS)
485 mp->mnt_iosize_max = MAXPHYS;
490 /* rmp contains any information about this specific mount */
491 rmp = malloc(sizeof *rmp, M_REISERFSMNT, M_WAITOK | M_ZERO);
496 sbi = malloc(sizeof *sbi, M_REISERFSMNT, M_WAITOK | M_ZERO);
501 rmp->rm_reiserfs = sbi;
503 rmp->rm_devvp = devvp;
505 #if (__FreeBSD_version >= 600000)
506 rmp->rm_bo = &devvp->v_bufobj;
510 /* Set default values for options: non-aggressive tails */
511 REISERFS_SB(sbi)->s_mount_opt = (1 << REISERFS_SMALLTAIL);
512 REISERFS_SB(sbi)->s_rd_only = 1;
513 REISERFS_SB(sbi)->s_devvp = devvp;
515 /* Read the super block */
516 if ((error = read_super_block(rmp, REISERFS_OLD_DISK_OFFSET)) == 0) {
517 /* The read process succeeded, it's an old format */
519 } else if ((error = read_super_block(rmp, REISERFS_DISK_OFFSET)) != 0) {
520 reiserfs_log(LOG_ERR, "can not find a ReiserFS filesystem\n");
524 rs = SB_DISK_SUPER_BLOCK(sbi);
527 * Let's do basic sanity check to verify that underlying device is
528 * not smaller than the filesystem. If the check fails then abort and
529 * scream, because bad stuff will happen otherwise.
532 if (s->s_bdev && s->s_bdev->bd_inode &&
533 i_size_read(s->s_bdev->bd_inode) <
534 sb_block_count(rs) * sb_blocksize(rs)) {
535 reiserfs_log(LOG_ERR,
536 "reiserfs: filesystem cannot be mounted because it is "
537 "bigger than the device.\n");
538 reiserfs_log(LOG_ERR, "reiserfs: you may need to run fsck "
539 "rr may be you forgot to reboot after fdisk when it "
546 * XXX This is from the original Linux code, but why affecting 2 values
547 * to the same variable?
549 sbi->s_mount_state = SB_REISERFS_STATE(sbi);
550 sbi->s_mount_state = REISERFS_VALID_FS;
552 if ((error = (old_format ?
553 read_old_bitmaps(rmp) : read_bitmaps(rmp)))) {
554 reiserfs_log(LOG_ERR, "unable to read bitmap\n");
558 /* Make data=ordered the default */
559 if (!reiserfs_data_log(sbi) && !reiserfs_data_ordered(sbi) &&
560 !reiserfs_data_writeback(sbi)) {
561 REISERFS_SB(sbi)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
564 if (reiserfs_data_log(sbi)) {
565 reiserfs_log(LOG_INFO, "using journaled data mode\n");
566 } else if (reiserfs_data_ordered(sbi)) {
567 reiserfs_log(LOG_INFO, "using ordered data mode\n");
569 reiserfs_log(LOG_INFO, "using writeback data mode\n");
572 /* TODO Not yet supported */
574 if(journal_init(sbi, jdev_name, old_format, commit_max_age)) {
575 reiserfs_log(LOG_ERR, "unable to initialize journal space\n");
578 jinit_done = 1 ; /* once this is set, journal_release must
579 be called if we error out of the mount */
582 if (reread_meta_blocks(sbi)) {
583 reiserfs_log(LOG_ERR,
584 "unable to reread meta blocks after journal init\n");
589 /* Define and initialize hash function */
590 sbi->s_hash_function = hash_function(rmp);
592 if (sbi->s_hash_function == NULL) {
593 reiserfs_log(LOG_ERR, "couldn't determined hash function\n");
598 if (is_reiserfs_3_5(rs) ||
599 (is_reiserfs_jr(rs) && SB_VERSION(sbi) == REISERFS_VERSION_1))
600 bit_set(&(sbi->s_properties), REISERFS_3_5);
602 bit_set(&(sbi->s_properties), REISERFS_3_6);
605 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
606 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
608 mp->mnt_flag |= MNT_LOCAL;
610 #if defined(si_mountpoint)
611 devvp->v_rdev->si_mountpoint = mp;
617 reiserfs_log(LOG_INFO, "*** error during mount ***\n");
619 if (SB_AP_BITMAP(sbi)) {
621 for (i = 0; i < SB_BMAP_NR(sbi); i++) {
622 if (!SB_AP_BITMAP(sbi)[i].bp_data)
624 free(SB_AP_BITMAP(sbi)[i].bp_data, M_REISERFSMNT);
626 free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
630 free(sbi->s_rs, M_REISERFSMNT);
635 #if (__FreeBSD_version < 600000)
636 (void)VOP_CLOSE(devvp, FREAD, NOCRED, td);
641 g_wither_geom_close(cp->geom, ENXIO);
648 free(sbi, M_REISERFSMNT);
650 free(rmp, M_REISERFSMNT);
655 * Read the super block
658 read_super_block(struct reiserfs_mount *rmp, int offset)
662 struct reiserfs_super_block *rs;
663 struct reiserfs_sb_info *sbi;
664 uint16_t fs_blocksize;
666 if (offset == REISERFS_OLD_DISK_OFFSET) {
667 reiserfs_log(LOG_DEBUG,
668 "reiserfs/super: read old format super block\n");
670 reiserfs_log(LOG_DEBUG,
671 "reiserfs/super: read new format super block\n");
674 /* Read the super block */
675 if ((error = bread(rmp->rm_devvp, offset * btodb(REISERFS_BSIZE),
676 REISERFS_BSIZE, NOCRED, &bp)) != 0) {
677 reiserfs_log(LOG_ERR, "can't read device\n");
681 /* Get it from the buffer data */
682 rs = (struct reiserfs_super_block *)bp->b_data;
683 if (!is_any_reiserfs_magic_string(rs)) {
688 fs_blocksize = sb_blocksize(rs);
692 if (fs_blocksize <= 0) {
693 reiserfs_log(LOG_ERR, "unexpected null block size");
697 /* Read the super block (for double check)
698 * We can't read the same blkno with a different size: it causes
699 * panic() if INVARIANTS is set. So we keep REISERFS_BSIZE */
700 if ((error = bread(rmp->rm_devvp,
701 offset * REISERFS_BSIZE / fs_blocksize * btodb(fs_blocksize),
702 REISERFS_BSIZE, NOCRED, &bp)) != 0) {
703 reiserfs_log(LOG_ERR, "can't reread the super block\n");
707 rs = (struct reiserfs_super_block *)bp->b_data;
708 if (sb_blocksize(rs) != fs_blocksize) {
709 reiserfs_log(LOG_ERR, "unexpected block size "
710 "(found=%u, expected=%u)\n",
711 sb_blocksize(rs), fs_blocksize);
716 reiserfs_log(LOG_DEBUG, "magic: `%s'\n", rs->s_v1.s_magic);
717 reiserfs_log(LOG_DEBUG, "label: `%s'\n", rs->s_label);
718 reiserfs_log(LOG_DEBUG, "block size: %6d\n", sb_blocksize(rs));
719 reiserfs_log(LOG_DEBUG, "block count: %6u\n",
720 rs->s_v1.s_block_count);
721 reiserfs_log(LOG_DEBUG, "bitmaps number: %6u\n",
724 if (rs->s_v1.s_root_block == -1) {
726 "reiserfs: Unfinished reiserfsck --rebuild-tree run "
728 "run reiserfsck --rebuild-tree and wait for a "
729 "completion. If that\n"
730 "fails, get newer reiserfsprogs package");
735 sbi = rmp->rm_reiserfs;
736 sbi->s_blocksize = fs_blocksize;
738 for (bits = 9, fs_blocksize >>= 9; fs_blocksize >>= 1; bits++)
740 sbi->s_blocksize_bits = bits;
742 /* Copy the buffer and release it */
743 sbi->s_rs = malloc(sizeof *rs, M_REISERFSMNT, M_WAITOK | M_ZERO);
745 reiserfs_log(LOG_ERR, "can not read the super block\n");
749 bcopy(rs, sbi->s_rs, sizeof(struct reiserfs_super_block));
752 if (is_reiserfs_jr(rs)) {
753 if (sb_version(rs) == REISERFS_VERSION_2)
754 reiserfs_log(LOG_INFO, "found reiserfs format \"3.6\""
755 " with non-standard journal");
756 else if (sb_version(rs) == REISERFS_VERSION_1)
757 reiserfs_log(LOG_INFO, "found reiserfs format \"3.5\""
758 " with non-standard journal");
760 reiserfs_log(LOG_ERR, "found unknown "
761 "format \"%u\" of reiserfs with non-standard magic",
767 * s_version of standard format may contain incorrect
768 * information, so we just look at the magic string
770 reiserfs_log(LOG_INFO,
771 "found reiserfs format \"%s\" with standard journal\n",
772 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
779 * load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure
781 * @sbi - superblock info for this filesystem
782 * @bi - the bitmap info to be loaded. Requires that bi->bp is valid.
784 * This routine counts how many free bits there are, finding the first
785 * zero as a side effect. Could also be implemented as a loop of
786 * test_bit() calls, or a loop of find_first_zero_bit() calls. This
787 * implementation is similar to find_first_zero_bit(), but doesn't
788 * return after it finds the first bit. Should only be called on fs
789 * mount, but should be fairly efficient anyways.
791 * bi->first_zero_hint is considered unset if it == 0, since the bitmap
792 * itself will invariably occupt block 0 represented in the bitmap. The
793 * only exception to this is when free_count also == 0, since there will
794 * be no free blocks at all.
797 load_bitmap_info_data(struct reiserfs_sb_info *sbi,
798 struct reiserfs_bitmap_info *bi)
802 cur = (unsigned long *)bi->bp_data;
803 while ((char *)cur < (bi->bp_data + sbi->s_blocksize)) {
805 * No need to scan if all 0's or all 1's.
806 * Since we're only counting 0's, we can simply ignore
810 if (bi->first_zero_hint == 0) {
811 bi->first_zero_hint =
812 ((char *)cur - bi->bp_data) << 3;
814 bi->free_count += sizeof(unsigned long) * 8;
815 } else if (*cur != ~0L) {
818 for (b = 0; b < sizeof(unsigned long) * 8; b++) {
819 if (!reiserfs_test_le_bit(b, cur)) {
821 if (bi->first_zero_hint == 0)
822 bi->first_zero_hint =
824 bi->bp_data) << 3) + b;
836 read_bitmaps(struct reiserfs_mount *rmp)
839 struct buf *bp = NULL;
840 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
842 /* Allocate memory for the table of bitmaps */
844 malloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(sbi),
845 M_REISERFSMNT, M_WAITOK | M_ZERO);
846 if (!SB_AP_BITMAP(sbi))
849 /* Read all the bitmaps */
851 bmap_nr = (REISERFS_DISK_OFFSET_IN_BYTES / sbi->s_blocksize + 1) *
852 btodb(sbi->s_blocksize);
853 i < SB_BMAP_NR(sbi); i++, bmap_nr = sbi->s_blocksize * 8 * i) {
854 SB_AP_BITMAP(sbi)[i].bp_data = malloc(sbi->s_blocksize,
855 M_REISERFSMNT, M_WAITOK | M_ZERO);
856 if (!SB_AP_BITMAP(sbi)[i].bp_data)
858 bread(rmp->rm_devvp, bmap_nr, sbi->s_blocksize, NOCRED, &bp);
859 bcopy(bp->b_data, SB_AP_BITMAP(sbi)[i].bp_data,
864 /*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
865 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);*/
868 for (i = 0; i < SB_BMAP_NR(sbi); i++) {
869 /*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
870 reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
871 "bitmap block (#%lu) reading failed",
872 SB_AP_BITMAP(s)[i].bh->b_blocknr);
873 for (i = 0; i < SB_BMAP_NR(s); i++)
874 brelse(SB_AP_BITMAP(s)[i].bh);
875 vfree(SB_AP_BITMAP(s));
876 SB_AP_BITMAP(s) = NULL;
879 load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
880 reiserfs_log(LOG_DEBUG,
881 "%d free blocks (starting at block %ld)\n",
882 SB_AP_BITMAP(sbi)[i].free_count,
883 (long)SB_AP_BITMAP(sbi)[i].first_zero_hint);
889 // TODO Not supported
891 read_old_bitmaps(struct reiserfs_mount *rmp)
897 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
898 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(sbi);
900 /* First of bitmap blocks */
901 int bmp1 = (REISERFS_OLD_DISK_OFFSET / sbi->s_blocksize) *
902 btodb(sbi->s_blocksize);
904 /* Read true bitmap */
906 malloc(sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs),
907 M_REISERFSMNT, M_WAITOK | M_ZERO);
908 if (!SB_AP_BITMAP(sbi))
911 for (i = 0; i < sb_bmap_nr(rs); i ++) {
912 SB_AP_BITMAP(sbi)[i].bp = getblk(rmp->rm_devvp,
913 (bmp1 + i) * btodb(sbi->s_blocksize), sbi->s_blocksize, 0, 0, 0);
914 if (!SB_AP_BITMAP(sbi)[i].bp)
916 load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
923 /* -------------------------------------------------------------------
924 * Hash detection stuff
925 * -------------------------------------------------------------------*/
928 get_root_node(struct reiserfs_mount *rmp, struct reiserfs_node **root)
930 struct reiserfs_node *ip;
931 struct reiserfs_iget_args args;
933 /* Allocate the node structure */
934 reiserfs_log(LOG_DEBUG, "malloc(struct reiserfs_node)\n");
935 ip = malloc(sizeof(struct reiserfs_node),
936 M_REISERFSNODE, M_WAITOK | M_ZERO);
938 /* Fill the structure */
939 reiserfs_log(LOG_DEBUG, "filling *ip\n");
940 ip->i_dev = rmp->rm_dev;
941 ip->i_number = REISERFS_ROOT_OBJECTID;
942 ip->i_ino = REISERFS_ROOT_PARENT_OBJECTID;
943 ip->i_reiserfs = rmp->rm_reiserfs;
946 args.objectid = ip->i_number;
947 args.dirid = ip->i_ino;
948 reiserfs_log(LOG_DEBUG, "call reiserfs_read_locked_inode("
949 "objectid=%d,dirid=%d)\n", args.objectid, args.dirid);
950 reiserfs_read_locked_inode(ip, &args);
952 ip->i_devvp = rmp->rm_devvp;
953 //XXX VREF(ip->i_devvp); Is it necessary ?
960 * If root directory is empty - we set default - Yura's - hash and warn
962 * FIXME: we look for only one name in a directory. If tea and yura both
963 * have the same value - we ask user to send report to the mailing list
965 uint32_t find_hash_out(struct reiserfs_mount *rmp)
969 INITIALIZE_PATH(path);
970 struct reiserfs_node *ip;
971 struct reiserfs_sb_info *sbi;
972 struct reiserfs_dir_entry de;
973 uint32_t hash = DEFAULT_HASH;
975 get_root_node(rmp, &ip);
979 sbi = rmp->rm_reiserfs;
982 uint32_t teahash, r5hash, yurahash;
984 reiserfs_log(LOG_DEBUG, "make_cpu_key\n");
985 make_cpu_key(&key, ip, ~0, TYPE_DIRENTRY, 3);
986 reiserfs_log(LOG_DEBUG, "search_by_entry_key for "
987 "key(objectid=%d,dirid=%d)\n",
988 key.on_disk_key.k_objectid, key.on_disk_key.k_dir_id);
989 retval = search_by_entry_key(sbi, &key, &path, &de);
990 if (retval == IO_ERROR) {
994 if (retval == NAME_NOT_FOUND)
997 reiserfs_log(LOG_DEBUG, "name found\n");
999 set_de_name_and_namelen(&de);
1001 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1002 /* Allow override in this case */
1003 if (reiserfs_rupasov_hash(sbi)) {
1006 reiserfs_log(LOG_DEBUG,
1007 "FS seems to be empty, autodetect "
1008 "is using the default hash");
1012 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1013 teahash = GET_HASH_VALUE(keyed_hash(de.de_name,
1015 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1016 if (((teahash == r5hash) &&
1018 deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)) ||
1019 ((teahash == yurahash) &&
1022 deh_offset(&(de.de_deh[de.de_entry_num]))))) ||
1023 ((r5hash == yurahash) &&
1026 deh_offset(&(de.de_deh[de.de_entry_num])))))) {
1027 reiserfs_log(LOG_ERR,
1028 "unable to automatically detect hash "
1029 "function. Please mount with -o "
1030 "hash={tea,rupasov,r5}");
1036 deh_offset(&(de.de_deh[de.de_entry_num]))) == yurahash) {
1037 reiserfs_log(LOG_DEBUG, "detected YURA hash\n");
1039 } else if (GET_HASH_VALUE(
1040 deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) {
1041 reiserfs_log(LOG_DEBUG, "detected TEA hash\n");
1043 } else if (GET_HASH_VALUE(
1044 deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) {
1045 reiserfs_log(LOG_DEBUG, "detected R5 hash\n");
1048 reiserfs_log(LOG_WARNING, "unrecognised hash function");
1057 /* Finds out which hash names are sorted with */
1059 what_hash(struct reiserfs_mount *rmp)
1062 struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
1065 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(sbi));
1068 * reiserfs_hash_detect() == true if any of the hash mount options
1069 * were used. We must check them to make sure the user isn't using a
1072 if (code == UNSET_HASH || reiserfs_hash_detect(sbi))
1073 code = find_hash_out(rmp);
1075 if (code != UNSET_HASH && reiserfs_hash_detect(sbi)) {
1077 * Detection has found the hash, and we must check against
1080 if (reiserfs_rupasov_hash(sbi) && code != YURA_HASH) {
1081 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1082 "unable to force rupasov hash",
1083 reiserfs_hashname(code));
1085 } else if (reiserfs_tea_hash(sbi) && code != TEA_HASH) {
1086 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1087 "unable to force tea hash",
1088 reiserfs_hashname(code));
1090 } else if (reiserfs_r5_hash(sbi) && code != R5_HASH) {
1091 reiserfs_log(LOG_ERR, "error, %s hash detected, "
1092 "unable to force r5 hash",
1093 reiserfs_hashname(code));
1098 * Find_hash_out was not called or could not determine
1101 if (reiserfs_rupasov_hash(sbi)) {
1103 } else if (reiserfs_tea_hash(sbi)) {
1105 } else if (reiserfs_r5_hash(sbi)) {
1110 /* TODO Not supported yet */
1112 /* If we are mounted RW, and we have a new valid hash code, update
1114 if (code != UNSET_HASH &&
1115 !(s->s_flags & MS_RDONLY) &&
1116 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1117 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1124 /* Return pointer to appropriate function */
1126 hash_function(struct reiserfs_mount *rmp)
1129 switch (what_hash(rmp)) {
1131 reiserfs_log(LOG_INFO, "using tea hash to sort names\n");
1132 return (keyed_hash);
1134 reiserfs_log(LOG_INFO, "using rupasov hash to sort names\n");
1137 reiserfs_log(LOG_INFO, "using r5 hash to sort names\n");
1144 /* -------------------------------------------------------------------
1146 * -------------------------------------------------------------------*/
1148 static struct vfsops reiser_vfsops = {
1149 .vfs_cmount = reiserfs_cmount,
1150 .vfs_mount = reiserfs_mount,
1151 .vfs_unmount = reiserfs_unmount,
1152 //.vfs_checkexp = reiserfs_checkexp,
1153 //.vfs_extattrctl = reiserfs_extattrctl,
1154 .vfs_fhtovp = reiserfs_fhtovp,
1155 //.vfs_quotactl = reiserfs_quotactl,
1156 .vfs_root = reiserfs_root,
1157 //.vfs_start = reiserfs_start,
1158 .vfs_statfs = reiserfs_statfs,
1159 //.vfs_sync = reiserfs_sync,
1160 //.vfs_vget = reiserfs_vget,
1163 VFS_SET(reiser_vfsops, reiserfs, VFCF_READONLY);