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| author | Jan Kara <jack@suse.cz> | 2009-08-06 23:29:34 +0200 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2009-08-10 21:20:22 +0200 |
| commit | b409d7a0ab46fe530efe52734984b4ed5d46c3eb (patch) | |
| tree | f9f7861ff8b943ee905dc16a8290cac757df391e /fs/ocfs2/journal.h | |
| parent | ocfs2: keep index within status_map[] (diff) | |
| download | linux-b409d7a0ab46fe530efe52734984b4ed5d46c3eb.tar.xz linux-b409d7a0ab46fe530efe52734984b4ed5d46c3eb.zip | |
ocfs2: Fix possible deadlock when extending quota file
In OCFS2, allocator locks rank above transaction start. Thus we
cannot extend quota file from inside a transaction less we could
deadlock.
We solve the problem by starting transaction not already in
ocfs2_acquire_dquot() but only in ocfs2_local_read_dquot() and
ocfs2_global_read_dquot() and we allocate blocks to quota files before starting
the transaction. In case we crash, quota files will just have a few blocks
more but that's no problem since we just use them next time we extend the
quota file.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/journal.h')
| -rw-r--r-- | fs/ocfs2/journal.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index 4a4d3b55fd22..2c3222aec622 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -363,11 +363,6 @@ static inline int ocfs2_quota_trans_credits(struct super_block *sb) return credits; } -/* Number of credits needed for removing quota structure from file */ -int ocfs2_calc_qdel_credits(struct super_block *sb, int type); -/* Number of credits needed for initialization of new quota structure */ -int ocfs2_calc_qinit_credits(struct super_block *sb, int type); - /* group extend. inode update and last group update. */ #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) |