xfs: calculate XFS_TRANS_QM_DQALLOC space log reservation at mount time

The disk quota allocation log space reservation is calcuated at runtime,
this patch does it at mount time.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
CC: Dave Chinner <david@fromorbit.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

4 files changed, 20 insertions, 9 deletions

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 9e1bf5294c91..8025eb23ad72 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -612,15 +612,9 @@ xfs_qm_dqread(
         if (flags & XFS_QMOPT_DQALLOC) {
                 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC);
                 error = xfs_trans_reserve(tp, XFS_QM_DQALLOC_SPACE_RES(mp),
-                                XFS_WRITE_LOG_RES(mp) +
-                                /*
-                                 * Round the chunklen up to the next multiple
-                                 * of 128 (buf log item chunk size)).
-                                 */
-                                BBTOB(mp->m_quotainfo->qi_dqchunklen) - 1 + 128,
-                                0,
-                                XFS_TRANS_PERM_LOG_RES,
-                                XFS_WRITE_LOG_COUNT);
+                                          XFS_QM_DQALLOC_LOG_RES(mp), 0,
+                                          XFS_TRANS_PERM_LOG_RES,
+                                          XFS_WRITE_LOG_COUNT);
                 if (error)
                         goto error1;
                 cancelflags = XFS_TRANS_RELEASE_LOG_RES;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 9baa7e0fbd45..fc500c6c8800 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -42,6 +42,7 @@ typedef struct xfs_trans_reservations {
         uint    tr_growrtfree;  /* grow realtime freeing */
         uint    tr_qm_sbchange; /* change quota flags */
         uint    tr_qm_setqlim;  /* adjust quota limits */
+        uint    tr_qm_dqalloc;  /* allocate quota on disk */
 } xfs_trans_reservations_t;
 
 #ifndef __KERNEL__
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 1838850de145..6dd2c043efcd 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -568,6 +568,20 @@ xfs_calc_qm_setqlim_reservation(
 }
 
 /*
+ * Allocating quota on disk if needed.
+ *      the write transaction log space: XFS_WRITE_LOG_RES(mp)
+ *      the unit of quota allocation: one system block size
+ */
+STATIC uint
+xfs_calc_qm_dqalloc_reservation(
+        struct xfs_mount        *mp)
+{
+        return XFS_WRITE_LOG_RES(mp) +
+                xfs_calc_buf_res(1,
+                        XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1);
+}
+
+/*
  * Initialize the precomputed transaction reservation values
  * in the mount structure.
  */
@@ -600,6 +614,7 @@ xfs_trans_init(
         resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
         resp->tr_qm_sbchange = xfs_calc_qm_sbchange_reservation(mp);
         resp->tr_qm_setqlim = xfs_calc_qm_setqlim_reservation(mp);
+        resp->tr_qm_dqalloc = xfs_calc_qm_dqalloc_reservation(mp);
 }
 
 /*
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 93a0ec73c6fe..04575db806d4 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -264,6 +264,7 @@ struct xfs_log_item_desc {
 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
 #define XFS_QM_SBCHANGE_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_sbchange)
 #define XFS_QM_SETQLIM_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_setqlim)
+#define XFS_QM_DQALLOC_LOG_RES(mp)      ((mp)->m_reservations.tr_qm_dqalloc)
 
 /*
  * Various log count values.