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| author | Younger Liu <younger.liucn@gmail.com> | 2014-04-03 23:47:10 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-04 01:20:56 +0200 |
| commit | db66c71577d525c0cd65e66ff675747565783ba4 (patch) | |
| tree | 94744927610c329533bad994055a37d2e2a3b5d1 /fs/ocfs2/suballoc.c | |
| parent | ocfs2: flock: drop cross-node lock when failed locally (diff) | |
| download | linux-db66c71577d525c0cd65e66ff675747565783ba4.tar.xz linux-db66c71577d525c0cd65e66ff675747565783ba4.zip | |
ocfs2: rollback alloc_dinode counts when ocfs2_block_group_set_bits() failed
After updating alloc_dinode counts in ocfs2_alloc_dinode_update_counts(),
if ocfs2_alloc_dinode_update_bitmap() failed, there is a rare case that
some space may be lost.
So, roll back alloc_dinode counts when ocfs2_block_group_set_bits()
failed.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Younger Liu <younger.liucn@gmail.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/suballoc.c')
| -rw-r--r-- | fs/ocfs2/suballoc.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 482d6c2a3ea1..94fb1f3d9e62 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -1608,6 +1608,21 @@ out: return ret; } +void ocfs2_rollback_alloc_dinode_counts(struct inode *inode, + struct buffer_head *di_bh, + u32 num_bits, + u16 chain) +{ + u32 tmp_used; + struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; + struct ocfs2_chain_list *cl; + + cl = (struct ocfs2_chain_list *)&di->id2.i_chain; + tmp_used = le32_to_cpu(di->id1.bitmap1.i_used); + di->id1.bitmap1.i_used = cpu_to_le32(tmp_used - num_bits); + le32_add_cpu(&cl->cl_recs[chain].c_free, num_bits); +} + static int ocfs2_bg_discontig_fix_by_rec(struct ocfs2_suballoc_result *res, struct ocfs2_extent_rec *rec, struct ocfs2_chain_list *cl) @@ -1708,8 +1723,12 @@ static int ocfs2_search_one_group(struct ocfs2_alloc_context *ac, ret = ocfs2_block_group_set_bits(handle, alloc_inode, gd, group_bh, res->sr_bit_offset, res->sr_bits); - if (ret < 0) + if (ret < 0) { + ocfs2_rollback_alloc_dinode_counts(alloc_inode, ac->ac_bh, + res->sr_bits, + le16_to_cpu(gd->bg_chain)); mlog_errno(ret); + } out_loc_only: *bits_left = le16_to_cpu(gd->bg_free_bits_count); @@ -1839,6 +1858,8 @@ static int ocfs2_search_chain(struct ocfs2_alloc_context *ac, res->sr_bit_offset, res->sr_bits); if (status < 0) { + ocfs2_rollback_alloc_dinode_counts(alloc_inode, + ac->ac_bh, res->sr_bits, chain); mlog_errno(status); goto bail; } @@ -2150,6 +2171,8 @@ int ocfs2_claim_new_inode_at_loc(handle_t *handle, res->sr_bit_offset, res->sr_bits); if (ret < 0) { + ocfs2_rollback_alloc_dinode_counts(ac->ac_inode, + ac->ac_bh, res->sr_bits, chain); mlog_errno(ret); goto out; } |