static int
is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
{
return ((is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
is_reiserfs_jr(rs)));
}
/* return 1 if this is not super block */
static int print_super_block(struct buffer_head *bh)
{
struct reiserfs_super_block *rs =
(struct reiserfs_super_block *)(bh->b_data);
int skipped, data_blocks;
char *version;
char b[BDEVNAME_SIZE];
if (is_reiserfs_3_5(rs)) {
version = "3.5";
} else if (is_reiserfs_3_6(rs)) {
version = "3.6";
} else if (is_reiserfs_jr(rs)) {
version = ((sb_version(rs) == REISERFS_VERSION_2) ?
"3.6" : "3.5");
} else {
return 1;
}
printk("%s\'s super block is in block %llu\n", bdevname(bh->b_bdev, b),
(unsigned long long)bh->b_blocknr);
printk("Reiserfs version %s\n", version);
printk("Block count %u\n", sb_block_count(rs));
printk("Blocksize %d\n", sb_blocksize(rs));
printk("Free blocks %u\n", sb_free_blocks(rs));
// FIXME: this would be confusing if
// someone stores reiserfs super block in some data block ;)
// skipped = (bh->b_blocknr * bh->b_size) / sb_blocksize(rs);
skipped = bh->b_blocknr;
data_blocks = sb_block_count(rs) - skipped - 1 - sb_bmap_nr(rs) -
(!is_reiserfs_jr(rs) ? sb_jp_journal_size(rs) +
1 : sb_reserved_for_journal(rs)) - sb_free_blocks(rs);
printk
("Busy blocks (skipped %d, bitmaps - %d, journal (or reserved) blocks - %d\n"
"1 super block, %d data blocks\n", skipped, sb_bmap_nr(rs),
(!is_reiserfs_jr(rs) ? (sb_jp_journal_size(rs) + 1) :
sb_reserved_for_journal(rs)), data_blocks);
printk("Root block %u\n", sb_root_block(rs));
printk("Journal block (first) %d\n", sb_jp_journal_1st_block(rs));
printk("Journal dev %d\n", sb_jp_journal_dev(rs));
printk("Journal orig size %d\n", sb_jp_journal_size(rs));
printk("FS state %d\n", sb_fs_state(rs));
printk("Hash function \"%s\"\n",
reiserfs_hashname(sb_hash_function_code(rs)));
printk("Tree height %d\n", sb_tree_height(rs));
return 0;
}
/*
* Read the super block
*/
static int
read_super_block(struct reiserfs_mount *rmp, int offset)
{
struct buf *bp;
int error, bits;
struct reiserfs_super_block *rs;
struct reiserfs_sb_info *sbi;
uint16_t fs_blocksize;
if (offset == REISERFS_OLD_DISK_OFFSET) {
reiserfs_log(LOG_DEBUG,
"reiserfs/super: read old format super block\n");
} else {
reiserfs_log(LOG_DEBUG,
"reiserfs/super: read new format super block\n");
}
/* Read the super block */
if ((error = bread(rmp->rm_devvp, offset * btodb(REISERFS_BSIZE),
REISERFS_BSIZE, NOCRED, &bp)) != 0) {
reiserfs_log(LOG_ERR, "can't read device\n");
return (error);
}
/* Get it from the buffer data */
rs = (struct reiserfs_super_block *)bp->b_data;
if (!is_any_reiserfs_magic_string(rs)) {
brelse(bp);
return (EINVAL);
}
fs_blocksize = sb_blocksize(rs);
brelse(bp);
bp = NULL;
if (fs_blocksize <= 0) {
reiserfs_log(LOG_ERR, "unexpected null block size");
return (EINVAL);
}
/* Read the super block (for double check)
* We can't read the same blkno with a different size: it causes
* panic() if INVARIANTS is set. So we keep REISERFS_BSIZE */
if ((error = bread(rmp->rm_devvp,
offset * REISERFS_BSIZE / fs_blocksize * btodb(fs_blocksize),
REISERFS_BSIZE, NOCRED, &bp)) != 0) {
reiserfs_log(LOG_ERR, "can't reread the super block\n");
return (error);
}
rs = (struct reiserfs_super_block *)bp->b_data;
if (sb_blocksize(rs) != fs_blocksize) {
reiserfs_log(LOG_ERR, "unexpected block size "
"(found=%u, expected=%u)\n",
sb_blocksize(rs), fs_blocksize);
brelse(bp);
return (EINVAL);
}
reiserfs_log(LOG_DEBUG, "magic: `%s'\n", rs->s_v1.s_magic);
reiserfs_log(LOG_DEBUG, "label: `%s'\n", rs->s_label);
reiserfs_log(LOG_DEBUG, "block size: %6d\n", sb_blocksize(rs));
reiserfs_log(LOG_DEBUG, "block count: %6u\n",
rs->s_v1.s_block_count);
reiserfs_log(LOG_DEBUG, "bitmaps number: %6u\n",
rs->s_v1.s_bmap_nr);
if (rs->s_v1.s_root_block == -1) {
log(LOG_ERR,
"reiserfs: Unfinished reiserfsck --rebuild-tree run "
"detected. Please\n"
"run reiserfsck --rebuild-tree and wait for a "
"completion. If that\n"
"fails, get newer reiserfsprogs package");
brelse(bp);
return (EINVAL);
}
sbi = rmp->rm_reiserfs;
sbi->s_blocksize = fs_blocksize;
for (bits = 9, fs_blocksize >>= 9; fs_blocksize >>= 1; bits++)
;
sbi->s_blocksize_bits = bits;
/* Copy the buffer and release it */
sbi->s_rs = malloc(sizeof *rs, M_REISERFSMNT, M_WAITOK | M_ZERO);
if (!sbi->s_rs) {
reiserfs_log(LOG_ERR, "can not read the super block\n");
brelse(bp);
return (ENOMEM);
}
bcopy(rs, sbi->s_rs, sizeof(struct reiserfs_super_block));
brelse(bp);
if (is_reiserfs_jr(rs)) {
if (sb_version(rs) == REISERFS_VERSION_2)
reiserfs_log(LOG_INFO, "found reiserfs format \"3.6\""
" with non-standard journal");
else if (sb_version(rs) == REISERFS_VERSION_1)
reiserfs_log(LOG_INFO, "found reiserfs format \"3.5\""
" with non-standard journal");
else {
reiserfs_log(LOG_ERR, "found unknown "
"format \"%u\" of reiserfs with non-standard magic",
sb_version(rs));
return (EINVAL);
}
} else {
/*
* s_version of standard format may contain incorrect
* information, so we just look at the magic string
*/
reiserfs_log(LOG_INFO,
"found reiserfs format \"%s\" with standard journal\n",
is_reiserfs_3_5(rs) ? "3.5" : "3.6");
}
return (0);
}
/*
* Common code for mount and mountroot
*/
static int
reiserfs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
{
int error, old_format = 0;
struct reiserfs_mount *rmp;
struct reiserfs_sb_info *sbi;
struct reiserfs_super_block *rs;
struct cdev *dev;
struct g_consumer *cp;
struct bufobj *bo;
//ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
dev = devvp->v_rdev;
dev_ref(dev);
DROP_GIANT();
g_topology_lock();
error = g_vfs_open(devvp, &cp, "reiserfs", /* read-only */ 0);
g_topology_unlock();
PICKUP_GIANT();
VOP_UNLOCK(devvp, 0);
if (error) {
dev_rel(dev);
return (error);
}
bo = &devvp->v_bufobj;
bo->bo_private = cp;
bo->bo_ops = g_vfs_bufops;
if (devvp->v_rdev->si_iosize_max != 0)
mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
if (mp->mnt_iosize_max > MAXPHYS)
mp->mnt_iosize_max = MAXPHYS;
rmp = NULL;
sbi = NULL;
/* rmp contains any information about this specific mount */
rmp = malloc(sizeof *rmp, M_REISERFSMNT, M_WAITOK | M_ZERO);
if (!rmp) {
error = (ENOMEM);
goto out;
}
sbi = malloc(sizeof *sbi, M_REISERFSMNT, M_WAITOK | M_ZERO);
if (!sbi) {
error = (ENOMEM);
goto out;
}
rmp->rm_reiserfs = sbi;
rmp->rm_mountp = mp;
rmp->rm_devvp = devvp;
rmp->rm_dev = dev;
rmp->rm_bo = &devvp->v_bufobj;
rmp->rm_cp = cp;
/* Set default values for options: non-aggressive tails */
REISERFS_SB(sbi)->s_mount_opt = (1 << REISERFS_SMALLTAIL);
REISERFS_SB(sbi)->s_rd_only = 1;
REISERFS_SB(sbi)->s_devvp = devvp;
/* Read the super block */
if ((error = read_super_block(rmp, REISERFS_OLD_DISK_OFFSET)) == 0) {
/* The read process succeeded, it's an old format */
old_format = 1;
} else if ((error = read_super_block(rmp, REISERFS_DISK_OFFSET)) != 0) {
reiserfs_log(LOG_ERR, "can not find a ReiserFS filesystem\n");
goto out;
}
rs = SB_DISK_SUPER_BLOCK(sbi);
/*
* Let's do basic sanity check to verify that underlying device is
* not smaller than the filesystem. If the check fails then abort and
* scream, because bad stuff will happen otherwise.
*/
#if 0
if (s->s_bdev && s->s_bdev->bd_inode &&
i_size_read(s->s_bdev->bd_inode) <
sb_block_count(rs) * sb_blocksize(rs)) {
reiserfs_log(LOG_ERR,
"reiserfs: filesystem cannot be mounted because it is "
"bigger than the device.\n");
reiserfs_log(LOG_ERR, "reiserfs: you may need to run fsck "
"rr may be you forgot to reboot after fdisk when it "
"told you to.\n");
goto out;
}
#endif
/*
* XXX This is from the original Linux code, but why affecting 2 values
* to the same variable?
*/
sbi->s_mount_state = SB_REISERFS_STATE(sbi);
sbi->s_mount_state = REISERFS_VALID_FS;
if ((error = (old_format ?
read_old_bitmaps(rmp) : read_bitmaps(rmp)))) {
reiserfs_log(LOG_ERR, "unable to read bitmap\n");
goto out;
}
/* Make data=ordered the default */
if (!reiserfs_data_log(sbi) && !reiserfs_data_ordered(sbi) &&
!reiserfs_data_writeback(sbi)) {
REISERFS_SB(sbi)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
}
if (reiserfs_data_log(sbi)) {
reiserfs_log(LOG_INFO, "using journaled data mode\n");
} else if (reiserfs_data_ordered(sbi)) {
reiserfs_log(LOG_INFO, "using ordered data mode\n");
} else {
reiserfs_log(LOG_INFO, "using writeback data mode\n");
}
/* TODO Not yet supported */
#if 0
if(journal_init(sbi, jdev_name, old_format, commit_max_age)) {
reiserfs_log(LOG_ERR, "unable to initialize journal space\n");
goto out;
} else {
jinit_done = 1 ; /* once this is set, journal_release must
be called if we error out of the mount */
}
if (reread_meta_blocks(sbi)) {
reiserfs_log(LOG_ERR,
"unable to reread meta blocks after journal init\n");
goto out;
}
#endif
/* Define and initialize hash function */
sbi->s_hash_function = hash_function(rmp);
if (sbi->s_hash_function == NULL) {
reiserfs_log(LOG_ERR, "couldn't determined hash function\n");
error = (EINVAL);
goto out;
}
if (is_reiserfs_3_5(rs) ||
(is_reiserfs_jr(rs) && SB_VERSION(sbi) == REISERFS_VERSION_1))
bit_set(&(sbi->s_properties), REISERFS_3_5);
else
bit_set(&(sbi->s_properties), REISERFS_3_6);
mp->mnt_data = rmp;
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_kern_flag |= MNTK_MPSAFE;
MNT_IUNLOCK(mp);
#if defined(si_mountpoint)
devvp->v_rdev->si_mountpoint = mp;
#endif
return (0);
out:
reiserfs_log(LOG_INFO, "*** error during mount ***\n");
if (sbi) {
if (SB_AP_BITMAP(sbi)) {
int i;
for (i = 0; i < SB_BMAP_NR(sbi); i++) {
if (!SB_AP_BITMAP(sbi)[i].bp_data)
break;
free(SB_AP_BITMAP(sbi)[i].bp_data,
M_REISERFSMNT);
}
free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
}
if (sbi->s_rs) {
free(sbi->s_rs, M_REISERFSMNT);
sbi->s_rs = NULL;
}
}
if (cp != NULL) {
DROP_GIANT();
g_topology_lock();
g_vfs_close(cp);
g_topology_unlock();
PICKUP_GIANT();
}
if (sbi)
free(sbi, M_REISERFSMNT);
if (rmp)
free(rmp, M_REISERFSMNT);
dev_rel(dev);
return (error);
}
