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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

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* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix bb_prealloc_list corruption due to wrong group locking
  ext4: fix bogus BUG_ONs in in mballoc code
  ext4: Print the find_group_flex() warning only once
  ext4: fix header check in ext4_ext_search_right() for deep extent trees.
This commit is contained in:
Linus Torvalds 2009-03-17 20:55:40 -07:00
commit 58cefd2b1e
3 changed files with 16 additions and 7 deletions
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6
fs/ext4/extents.c
View File

@ -1122,7 +1122,8 @@ ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path,
struct ext4_extent_idx *ix;
struct ext4_extent *ex;
ext4_fsblk_t block;
int depth, ee_len;
int depth; /* Note, NOT eh_depth; depth from top of tree */
int ee_len;
BUG_ON(path == NULL);
depth = path->p_depth;
@ -1179,7 +1180,8 @@ got_index:
if (bh == NULL)
return -EIO;
eh = ext_block_hdr(bh);
if (ext4_ext_check_header(inode, eh, depth)) {
/* subtract from p_depth to get proper eh_depth */
if (ext4_ext_check_header(inode, eh, path->p_depth - depth)) {
put_bh(bh);
return -EIO;
}

4
fs/ext4/ialloc.c
View File

@ -698,6 +698,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
struct inode *ret;
ext4_group_t i;
int free = 0;
static int once = 1;
ext4_group_t flex_group;
/* Cannot create files in a deleted directory */
@ -719,7 +720,8 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
ret2 = find_group_flex(sb, dir, &group);
if (ret2 == -1) {
ret2 = find_group_other(sb, dir, &group);
if (ret2 == 0 && printk_ratelimit())
if (ret2 == 0 && once)
once = 0;
printk(KERN_NOTICE "ext4: find_group_flex "
"failed, fallback succeeded dir %lu\n",
dir->i_ino);

13
fs/ext4/mballoc.c
View File

@ -1447,7 +1447,7 @@ static void ext4_mb_measure_extent(struct ext4_allocation_context *ac,
struct ext4_free_extent *gex = &ac->ac_g_ex;
BUG_ON(ex->fe_len <= 0);
BUG_ON(ex->fe_len >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
BUG_ON(ex->fe_len > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
BUG_ON(ex->fe_start >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
BUG_ON(ac->ac_status != AC_STATUS_CONTINUE);
@ -3292,7 +3292,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
}
BUG_ON(start + size <= ac->ac_o_ex.fe_logical &&
start > ac->ac_o_ex.fe_logical);
BUG_ON(size <= 0 || size >= EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb));
/* now prepare goal request */
@ -3589,6 +3589,7 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
struct super_block *sb, struct ext4_prealloc_space *pa)
{
ext4_group_t grp;
ext4_fsblk_t grp_blk;
if (!atomic_dec_and_test(&pa->pa_count) || pa->pa_free != 0)
return;
@ -3603,8 +3604,12 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
pa->pa_deleted = 1;
spin_unlock(&pa->pa_lock);
/* -1 is to protect from crossing allocation group */
ext4_get_group_no_and_offset(sb, pa->pa_pstart - 1, &grp, NULL);
grp_blk = pa->pa_pstart;
/* If linear, pa_pstart may be in the next group when pa is used up */
if (pa->pa_linear)
grp_blk--;
ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL);
/*
* possible race: