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xfs: introduce XFS_SB_LOG_RES() for transactions that modify sb on disk 

Introduce a new transaction space reservation XFS_SB_LOG_RES() for
those transactions that need to modify the superblock on disk.

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>
This commit is contained in:
Jeff Liu 2013-01-28 21:27:25 +08:00 committed by Ben Myers
parent 762d7ba657
commit a7bd794a0f
3 changed files with 14 additions and 0 deletions
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1
fs/xfs/xfs_mount.h
View File

@ -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_sb; /* modify superblock */
} xfs_trans_reservations_t;
#ifndef __KERNEL__

12
fs/xfs/xfs_trans.c
View File

@ -605,6 +605,17 @@ xfs_calc_qm_quotaoff_end_reservation(
return sizeof(struct xfs_qoff_logitem) * 2;
}
/*
* Syncing the incore super block changes to disk.
* the super block to reflect the changes: sector size
*/
STATIC uint
xfs_calc_sb_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.
@ -641,6 +652,7 @@ 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_sb = xfs_calc_sb_reservation(mp);
}
/*

1
fs/xfs/xfs_trans.h
View File

@ -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_SB_LOG_RES(mp) ((mp)->m_reservations.tr_sb)
/*
* Various log count values.