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ocfs2: fix the space leak in LA when releasing LA

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Commit 30dd3478c3 ("ocfs2: correctly use ocfs2_find_next_zero_bit()")
introduced an issue, the ocfs2_sync_local_to_main() ignores the last
contiguous free bits, which causes an OCFS2 volume to lose the last free
clusters of LA window during the release routine.

Please note, because commit dfe6c5692f ("ocfs2: fix the la space leak
when unmounting an ocfs2 volume") was reverted, this commit is a
replacement fix for commit dfe6c5692f.

Link: https://lkml.kernel.org/r/20241205104835.18223-3-heming.zhao@suse.com
Fixes: 30dd3478c3 ("ocfs2: correctly use ocfs2_find_next_zero_bit()")
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Suggested-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Heming Zhao 2024-12-05 18:48:33 +08:00 committed by Andrew Morton
parent 1a72d2ebee
commit 7782e3b3b0
1 changed files with 5 additions and 3 deletions
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8
fs/ocfs2/localalloc.c
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@ -971,9 +971,9 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
start = count = 0; start = count = 0;
left = le32_to_cpu(alloc->id1.bitmap1.i_total); left = le32_to_cpu(alloc->id1.bitmap1.i_total);
while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) < while (1) {
left) { bit_off = ocfs2_find_next_zero_bit(bitmap, left, start);
if (bit_off == start) { if ((bit_off < left) && (bit_off == start)) {
count++; count++;
start++; start++;
continue; continue;
@ -998,6 +998,8 @@ static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
} }
} }
if (bit_off >= left)
break;
count = 1; count = 1;
start = bit_off + 1; start = bit_off + 1;
} }