ocfs2: Avoid unnecessary block mapping when refreshing quota info

The position of global quota file info does not change. So we do not have
to do logical -> physical block translation every time we reread it from
disk. Thus we can also avoid taking ip_alloc_sem.

Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/ocfs2/quota.h b/fs/ocfs2/quota.h
index e22d2935128e..c7623430ca3c 100644
--- a/fs/ocfs2/quota.h
+++ b/fs/ocfs2/quota.h
@@ -52,8 +52,9 @@ struct ocfs2_mem_dqinfo {
         struct ocfs2_lock_res dqi_gqlock;       /* Lock protecting quota information structure */
         struct buffer_head *dqi_gqi_bh; /* Buffer head with global quota file inode - set only if inode lock is obtained */
         int dqi_gqi_count;              /* Number of holders of dqi_gqi_bh */
+        u64 dqi_giblk;                  /* Number of block with global information header */
         struct buffer_head *dqi_lqi_bh; /* Buffer head with local quota file inode */
-        struct buffer_head *dqi_ibh;    /* Buffer with information header */
+        struct buffer_head *dqi_libh;   /* Buffer with local information header */
         struct qtree_mem_dqinfo dqi_gi; /* Info about global file */
         struct delayed_work dqi_sync_work;      /* Work for syncing dquots */
         struct ocfs2_quota_recovery *dqi_rec;   /* Pointer to recovery