[PATCH v2 09/12] xfs: calculate XFS_TRNAS_SB_COUNT space log reservation at mount time

[Jeff Liu <jeff.liu@xxxxxxxxxx>]

Convert the calculation of sync incore superblock counters transaction log 
space reservation from
runtime to mount time.

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
 fs/xfs/xfs_mount.c |    4 ++--
 fs/xfs/xfs_mount.h |    1 +
 fs/xfs/xfs_trans.c |   13 +++++++++++++
 fs/xfs/xfs_trans.h |    1 +
 4 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index b39fa96..a596705 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1550,8 +1550,8 @@ xfs_log_sbcount(xfs_mount_t *mp)
                return 0;
 
        tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP);
-       error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
-                                       XFS_DEFAULT_LOG_COUNT);
+       error = xfs_trans_reserve(tp, 0, XFS_SYNC_ICSBCOUNT_LOG_RES(mp),
+                                 0, 0, XFS_DEFAULT_LOG_COUNT);
        if (error) {
                xfs_trans_cancel(tp, 0);
                return error;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index c5abd86..d119a56 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -45,6 +45,7 @@ typedef struct xfs_trans_reservations {
        uint    tr_qm_dqalloc;  /* allocate quota on disk */
        uint    tr_qm_quotaoff; /* turn quota off */
        uint    tr_qm_equotaoff;/* end of turn quota off */
+       uint    tr_sicsbcount;  /* sync incore super block counters */
 } xfs_trans_reservations_t;
 
 #ifndef __KERNEL__
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index eb1e9ea..ae48a8d 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -604,6 +604,18 @@ xfs_calc_qm_quotaoff_end_reservation(
 }
 
 /*
+ * Syncing the incore super block counters to disk.
+ *     the super block to reflect the allocated inodes,
+ *     free inodes/free data blocks: sector size
+ */
+STATIC uint
+xfs_calc_sync_icsbcount_reservation(
+       struct xfs_mount        *mp)
+{
+       return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize);
+}
+
+/*
  * Initialize the precomputed transaction reservation values
  * in the mount structure.
  */
@@ -639,6 +651,7 @@ xfs_trans_init(
        resp->tr_qm_dqalloc = xfs_calc_qm_dqalloc_reservation(mp);
        resp->tr_qm_quotaoff = xfs_calc_qm_quotaoff_reservation(mp);
        resp->tr_qm_equotaoff = xfs_calc_qm_quotaoff_end_reservation(mp);
+       resp->tr_sicsbcount = xfs_calc_sync_icsbcount_reservation(mp);
 }
 
 /*
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 77ccc36..637f59b 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -267,6 +267,7 @@ struct xfs_log_item_desc {
 #define XFS_QM_DQALLOC_LOG_RES(mp)     ((mp)->m_reservations.tr_qm_dqalloc)
 #define XFS_QM_QUOTAOFF_LOG_RES(mp)    ((mp)->m_reservations.tr_qm_quotaoff)
 #define XFS_QM_QUOTAOFF_END_LOG_RES(mp)        
((mp)->m_reservations.tr_qm_equotaoff)
+#define XFS_SYNC_ICSBCOUNT_LOG_RES(mp) ((mp)->m_reservations.tr_sicsbcount)
 
 /*
  * Various log count values.
-- 
1.7.9.5