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[PATCH 01/15] xfs: Add a new transaction for changing ag state

To: xfs@xxxxxxxxxxx
Subject: [PATCH 01/15] xfs: Add a new transaction for changing ag state
From: Jeff Liu <jeff.liu@xxxxxxxxxx>
Date: Fri, 16 Nov 2012 14:44:55 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121028 Thunderbird/16.0.2
This a new tranaction which would be use for Changing AG state via ioctl(2)

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
---
 fs/xfs/xfs_mount.h |    1 +
 fs/xfs/xfs_trans.c |   12 ++++++++++++
 fs/xfs/xfs_trans.h |    8 +++++---
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index deee09e..4fe2232 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -40,6 +40,7 @@ typedef struct xfs_trans_reservations {
        uint    tr_growrtalloc; /* grow realtime allocations */
        uint    tr_growrtzero;  /* grow realtime zeroing */
        uint    tr_growrtfree;  /* grow realtime freeing */
+       uint    tr_setagstate;  /* set a.g. state trans */
 } xfs_trans_reservations_t;
 
 #ifndef __KERNEL__
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 06ed520..5a5c4d8 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -531,6 +531,17 @@ xfs_calc_clear_agi_bucket_reservation(
 }
 
 /*
+ * Setting the state of an allocation group.
+ *     agf of the ag: sector size
+ */
+STATIC uint
+xfs_calc_set_agstate_reservation(
+       struct xfs_mount        *mp)
+{
+       return mp->m_sb.sb_sectsize + 128;
+}
+
+/*
  * Initialize the precomputed transaction reservation values
  * in the mount structure.
  */
@@ -561,6 +572,7 @@ xfs_trans_init(
        resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);
        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);
 }
 
 /*
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index db05654..a4f4092 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -107,7 +107,8 @@ typedef struct xfs_trans_header {
 #define        XFS_TRANS_SWAPEXT               40
 #define        XFS_TRANS_SB_COUNT              41
 #define        XFS_TRANS_CHECKPOINT            42
-#define        XFS_TRANS_TYPE_MAX              42
+#define XFS_TRANS_SET_AGSTATE          43
+#define        XFS_TRANS_TYPE_MAX              43
 /* new transaction types need to be reflected in xfs_logprint(8) */
 
 #define XFS_TRANS_TYPES \
@@ -152,7 +153,8 @@ typedef struct xfs_trans_header {
        { XFS_TRANS_CHECKPOINT,         "CHECKPOINT" }, \
        { XFS_TRANS_DUMMY1,             "DUMMY1" }, \
        { XFS_TRANS_DUMMY2,             "DUMMY2" }, \
-       { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }
+       { XLOG_UNMOUNT_REC_TYPE,        "UNMOUNT" }, \
+       { XFS_TRANS_SET_AGSTATE,        "SET_AGSTATE" }
 
 /*
  * This structure is used to track log items associated with
@@ -262,7 +264,7 @@ struct xfs_log_item_desc {
         (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
 #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)->m_reservations.tr_setagstate)
 
 /*
  * Various log count values.
-- 
1.7.4.1

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