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ocfs2: extend enough credits for freeing one truncate record while replaying truncate records

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Now function ocfs2_replay_truncate_records() first modifies tl_used,
then calls ocfs2_extend_trans() to extend transactions for gd and alloc
inode used for freeing clusters.  jbd2_journal_restart() may be called
and it may happen that tl_used in truncate log is decreased but the
clusters are not freed, which means these clusters are lost.  So we
should avoid extending transactions in these two operations.

Signed-off-by: joyce.xue <xuejiufei@huawei.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Acked-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Xue jiufei 2016-03-25 14:21:44 -07:00 committed by Linus Torvalds
parent 1721598985
commit 102c2595aa
1 changed files with 8 additions and 11 deletions
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19
fs/ocfs2/alloc.c
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@ -5954,16 +5954,6 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
ocfs2_journal_dirty(handle, tl_bh);
/* TODO: Perhaps we can calculate the bulk of the
* credits up front rather than extending like
* this. */
status = ocfs2_extend_trans(handle,
OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (status < 0) {
mlog_errno(status);
goto bail;
}
rec = tl->tl_recs[i];
start_blk = ocfs2_clusters_to_blocks(data_alloc_inode->i_sb,
le32_to_cpu(rec.t_start));
@ -5984,6 +5974,13 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
goto bail;
}
}
status = ocfs2_extend_trans(handle,
OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (status < 0) {
mlog_errno(status);
goto bail;
}
i--;
}
@ -6042,7 +6039,7 @@ int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
goto out_mutex;
}
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_UPDATE);
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);