This is a new transaction which would be used for shrinking fs data section.
Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
fs/xfs/xfs_mount.h | 1 +
fs/xfs/xfs_trans.c | 16 ++++++++++++++++
fs/xfs/xfs_trans.h | 7 +++++--
fs/xfs/xfs_trans_space.h | 2 ++
4 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 9eaea5a..9bf3ed6 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -41,6 +41,7 @@ typedef struct xfs_trans_reservations {
uint tr_growrtzero; /* grow realtime zeroing */
uint tr_growrtfree; /* grow realtime freeing */
uint tr_setagstate; /* set a.g. state trans */
+ uint tr_shrinkdata; /* fs data section shrink trans */
} xfs_trans_reservations_t;
#ifndef __KERNEL__
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 5a5c4d8..d7346da 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -542,6 +542,21 @@ xfs_calc_set_agstate_reservation(
}
/*
+ * Shrinking the data section of the filesystem.
+ * superblock
+ * agi and agf
+ * allocation btrees
+ */
+STATIC uint
+xfs_calc_shrinkdata_reservation(
+ struct xfs_mount *mp)
+{
+ return mp->m_sb.sb_sectsize * 3 +
+ XFS_ALLOCFREE_LOG_RES(mp, 1) +
+ 128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1));
+}
+
+/*
* Initialize the precomputed transaction reservation values
* in the mount structure.
*/
@@ -573,6 +588,7 @@ xfs_trans_init(
resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp);
resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
resp->tr_setagstate = xfs_calc_set_agstate_reservation(mp);
+ resp->tr_shrinkdata = xfs_calc_shrinkdata_reservation(mp);
}
/*
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 33aafda..6dc1fe8 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -109,7 +109,8 @@ typedef struct xfs_trans_header {
#define XFS_TRANS_CHECKPOINT 42
#define XFS_TRANS_SET_AGSTATE 43
#define XFS_TRANS_SWAPINO 44
-#define XFS_TRANS_TYPE_MAX 44
+#define XFS_TRANS_SHRINKFS 45
+#define XFS_TRANS_TYPE_MAX 45
/* new transaction types need to be reflected in xfs_logprint(8) */
#define XFS_TRANS_TYPES \
@@ -156,7 +157,8 @@ typedef struct xfs_trans_header {
{ XFS_TRANS_DUMMY2, "DUMMY2" }, \
{ XLOG_UNMOUNT_REC_TYPE, "UNMOUNT" }, \
{ XFS_TRANS_SET_AGSTATE, "SET_AGSTATE" }, \
- { XFS_TRANS_SWAPINO, "SWAPINO" }
+ { XFS_TRANS_SWAPINO, "SWAPINO" }, \
+ { XFS_TRANS_SHRINKFS, "SHRINKFS" }
/*
* This structure is used to track log items associated with
@@ -267,6 +269,7 @@ struct xfs_log_item_desc {
#define XFS_ATTRRM_LOG_RES(mp) ((mp)->m_reservations.tr_attrrm)
#define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp) ((mp)->m_reservations.tr_clearagi)
#define XFS_SETAGSTATE_LOG_RES(mp) ((mp)->m_reservations.tr_setagstate)
+#define XFS_SHRINKDATA_LOG_RES(mp) ((mp)->m_reservations.tr_shrinkdata)
/*
* Various log count values.
diff --git a/fs/xfs/xfs_trans_space.h b/fs/xfs/xfs_trans_space.h
index 7d2c920..103e442 100644
--- a/fs/xfs/xfs_trans_space.h
+++ b/fs/xfs/xfs_trans_space.h
@@ -82,5 +82,7 @@
(XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_SYMLINK_SPACE_RES(mp,nl,b) \
(XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
+#define XFS_SHRINKFS_SPACE_RES(mp) \
+ (2 * XFS_AG_MAXLEVELS(mp))
#endif /* __XFS_TRANS_SPACE_H__ */
--
1.7.4.1
_______________________________________________
xfs mailing list
xfs@xxxxxxxxxxx
http://oss.sgi.com/mailman/listinfo/xfs
