[PATCH] Move xfs_attr_rolltrans to xfs_trans_roll

[Niv Sardi <xaiki@sgi.com>]

Move it from the attr code to the transaction code and make the attr
code call the new function.

We rolltrans is really usefull whenever we want to use rolling
transaction, should be generic, it isn't dependent on any part of the
attr code anyway.

We use this excuse to change all the:
 if ((error = xfs_attr_rolltrans()))

calls into:
 error = xfs_trans_roll();
 if (error)

Signed-off-by: Niv Sardi <xaiki@sgi.com>
---
 fs/xfs/xfs_attr.c      |   30 +++++++++++++------
 fs/xfs/xfs_attr_leaf.c |   73 +++++------------------------------------------
 fs/xfs/xfs_attr_leaf.h |    2 -
 fs/xfs/xfs_trans.c     |   63 +++++++++++++++++++++++++++++++++++++++++
 fs/xfs/xfs_trans.h     |    1 +
 5 files changed, 92 insertions(+), 77 deletions(-)

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 4036bdc..4888a35 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -403,7 +403,9 @@ xfs_attr_set_int(xfs_inode_t *dp, struct xfs_name *name,
 		 * Commit the leaf transformation.  We'll need another (linked)
 		 * transaction to add the new attribute to the leaf.
 		 */
-		if ((error = xfs_attr_rolltrans(&args.trans, dp)))
+
+		error = xfs_trans_roll(&args.trans, dp);
+		if (error)
 			goto out;
 
 	}
@@ -1035,7 +1037,8 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		 * Commit the current trans (including the inode) and start
 		 * a new one.
 		 */
-		if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+		error = xfs_trans_roll(&args->trans, dp);
+		if (error)
 			return (error);
 
 		/*
@@ -1049,7 +1052,8 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 	 * Commit the transaction that added the attr name so that
 	 * later routines can manage their own transactions.
 	 */
-	if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+	error = xfs_trans_roll(&args->trans, dp);
+	if (error)
 		return (error);
 
 	/*
@@ -1138,7 +1142,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
 		/*
 		 * Commit the remove and start the next trans in series.
 		 */
-		error = xfs_attr_rolltrans(&args->trans, dp);
+		error = xfs_trans_roll(&args->trans, dp);
 
 	} else if (args->rmtblkno > 0) {
 		/*
@@ -1369,7 +1373,8 @@ restart:
 			 * Commit the node conversion and start the next
 			 * trans in the chain.
 			 */
-			if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+			error = xfs_trans_roll(&args->trans, dp);
+			if (error)
 				goto out;
 
 			goto restart;
@@ -1420,7 +1425,8 @@ restart:
 	 * Commit the leaf addition or btree split and start the next
 	 * trans in the chain.
 	 */
-	if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+	error = xfs_trans_roll(&args->trans, dp);
+	if (error)
 		goto out;
 
 	/*
@@ -1520,7 +1526,8 @@ restart:
 		/*
 		 * Commit and start the next trans in the chain.
 		 */
-		if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+		error = xfs_trans_roll(&args->trans, dp);
+		if (error)
 			goto out;
 
 	} else if (args->rmtblkno > 0) {
@@ -1652,7 +1659,8 @@ xfs_attr_node_removename(xfs_da_args_t *args)
 		/*
 		 * Commit the Btree join operation and start a new trans.
 		 */
-		if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+		error = xfs_trans_roll(&args->trans, dp);
+		if (error)
 			goto out;
 	}
 
@@ -2153,7 +2161,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
 		/*
 		 * Start the next trans in the chain.
 		 */
-		if ((error = xfs_attr_rolltrans(&args->trans, dp)))
+		error = xfs_trans_roll(&args->trans, dp);
+		if (error)
 			return (error);
 	}
 
@@ -2303,7 +2312,8 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args)
 		/*
 		 * Close out trans and start the next one in the chain.
 		 */
-		if ((error = xfs_attr_rolltrans(&args->trans, args->dp)))
+		error = xfs_trans_roll(&args->trans, args->dp);
+		if (error)
 			return (error);
 	}
 	return(0);
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 303d41e..36aa10c 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -2543,9 +2543,7 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args)
 	/*
 	 * Commit the flag value change and start the next trans in series.
 	 */
-	error = xfs_attr_rolltrans(&args->trans, args->dp);
-
-	return(error);
+	return xfs_trans_roll(&args->trans, args->dp);
 }
 
 /*
@@ -2592,7 +2590,7 @@ xfs_attr_leaf_setflag(xfs_da_args_t *args)
 	/*
 	 * Commit the flag value change and start the next trans in series.
 	 */
-	error = xfs_attr_rolltrans(&args->trans, args->dp);
+	error = xfs_trans_roll(&args->trans, args->dp);
 
 	return(error);
 }
@@ -2710,7 +2708,7 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args)
 	/*
 	 * Commit the flag value change and start the next trans in series.
 	 */
-	error = xfs_attr_rolltrans(&args->trans, args->dp);
+	error = xfs_trans_roll(&args->trans, args->dp);
 
 	return(error);
 }
@@ -2768,7 +2766,7 @@ xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp)
 	/*
 	 * Commit the invalidate and start the next transaction.
 	 */
-	error = xfs_attr_rolltrans(trans, dp);
+	error = xfs_trans_roll(trans, dp);
 
 	return (error);
 }
@@ -2870,7 +2868,8 @@ xfs_attr_node_inactive(xfs_trans_t **trans, xfs_inode_t *dp, xfs_dabuf_t *bp,
 		/*
 		 * Atomically commit the whole invalidate stuff.
 		 */
-		if ((error = xfs_attr_rolltrans(trans, dp)))
+		error = xfs_trans_roll(trans, dp);
+		if (error)
 			return (error);
 	}
 
@@ -3009,7 +3008,8 @@ xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
 			/*
 			 * Roll to next transaction.
 			 */
-			if ((error = xfs_attr_rolltrans(trans, dp)))
+			error = xfs_trans_roll(trans, dp);
+			if (error)
 				return (error);
 		}
 
@@ -3019,60 +3019,3 @@ xfs_attr_leaf_freextent(xfs_trans_t **trans, xfs_inode_t *dp,
 
 	return(0);
 }
-
-
-/*
- * Roll from one trans in the sequence of PERMANENT transactions to the next.
- */
-int
-xfs_attr_rolltrans(xfs_trans_t **transp, xfs_inode_t *dp)
-{
-	xfs_trans_t *trans;
-	unsigned int logres, count;
-	int	error;
-
-	/*
-	 * Ensure that the inode is always logged.
-	 */
-	trans = *transp;
-	xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
-
-	/*
-	 * Copy the critical parameters from one trans to the next.
-	 */
-	logres = trans->t_log_res;
-	count = trans->t_log_count;
-	*transp = xfs_trans_dup(trans);
-
-	/*
-	 * Commit the current transaction.
-	 * If this commit failed, then it'd just unlock those items that
-	 * are not marked ihold. That also means that a filesystem shutdown
-	 * is in progress. The caller takes the responsibility to cancel
-	 * the duplicate transaction that gets returned.
-	 */
-	if ((error = xfs_trans_commit(trans, 0)))
-		return (error);
-
-	trans = *transp;
-
-	/*
-	 * Reserve space in the log for th next transaction.
-	 * This also pushes items in the "AIL", the list of logged items,
-	 * out to disk if they are taking up space at the tail of the log
-	 * that we want to use.  This requires that either nothing be locked
-	 * across this call, or that anything that is locked be logged in
-	 * the prior and the next transactions.
-	 */
-	error = xfs_trans_reserve(trans, 0, logres, 0,
-				  XFS_TRANS_PERM_LOG_RES, count);
-	/*
-	 *  Ensure that the inode is in the new transaction and locked.
-	 */
-	if (!error) {
-		xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL);
-		xfs_trans_ihold(trans, dp);
-	}
-	return (error);
-
-}
diff --git a/fs/xfs/xfs_attr_leaf.h b/fs/xfs/xfs_attr_leaf.h
index 040f732..698e078 100644
--- a/fs/xfs/xfs_attr_leaf.h
+++ b/fs/xfs/xfs_attr_leaf.h
@@ -301,6 +301,4 @@ int	xfs_attr_leaf_order(struct xfs_dabuf *leaf1_bp,
 				   struct xfs_dabuf *leaf2_bp);
 int	xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize,
 					int *local);
-int	xfs_attr_rolltrans(struct xfs_trans **transp, struct xfs_inode *dp);
-
 #endif	/* __XFS_ATTR_LEAF_H__ */
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 1403864..8403eac 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -43,6 +43,7 @@
 #include "xfs_quota.h"
 #include "xfs_trans_priv.h"
 #include "xfs_trans_space.h"
+#include "xfs_inode_item.h"
 
 
 STATIC void	xfs_trans_apply_sb_deltas(xfs_trans_t *);
@@ -1216,6 +1217,68 @@ xfs_trans_free(
 	kmem_zone_free(xfs_trans_zone, tp);
 }
 
+/*
+ * Roll from one trans in the sequence of PERMANENT transactions to
+ * the next: permanent transactions are only flushed out when
+ * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
+ * as possible to let chunks of it go to the log. So we commit the
+ * chunk we've been working on and get a new transaction to continue.
+ */
+int
+xfs_trans_roll(
+	struct xfs_trans	**tpp,
+	struct xfs_inode	*dp)
+{
+	struct xfs_trans	*trans;
+	unsigned int		logres, count;
+	int			error;
+
+	/*
+	 * Ensure that the inode is always logged.
+	 */
+	trans = *tpp;
+	xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
+
+	/*
+	 * Copy the critical parameters from one trans to the next.
+	 */
+	logres = trans->t_log_res;
+	count = trans->t_log_count;
+	*tpp = xfs_trans_dup(trans);
+
+	/*
+	 * Commit the current transaction.
+	 * If this commit failed, then it'd just unlock those items that
+	 * are not marked ihold. That also means that a filesystem shutdown
+	 * is in progress. The caller takes the responsibility to cancel
+	 * the duplicate transaction that gets returned.
+	 */
+	error = xfs_trans_commit(trans, 0);
+	if (error)
+		return (error);
+
+	trans = *tpp;
+
+	/*
+	 * Reserve space in the log for th next transaction.
+	 * This also pushes items in the "AIL", the list of logged items,
+	 * out to disk if they are taking up space at the tail of the log
+	 * that we want to use.  This requires that either nothing be locked
+	 * across this call, or that anything that is locked be logged in
+	 * the prior and the next transactions.
+	 */
+	error = xfs_trans_reserve(trans, 0, logres, 0,
+				  XFS_TRANS_PERM_LOG_RES, count);
+	/*
+	 *  Ensure that the inode is in the new transaction and locked.
+	 */
+	if (error)
+		return error;
+
+	xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL);
+	xfs_trans_ihold(trans, dp);
+	return 0;
+}
 
 /*
  * THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item().
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 0804207..9161e99 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -986,6 +986,7 @@ int		_xfs_trans_commit(xfs_trans_t *,
 				  int *);
 #define xfs_trans_commit(tp, flags)	_xfs_trans_commit(tp, flags, NULL)
 void		xfs_trans_cancel(xfs_trans_t *, int);
+int		xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
 int		xfs_trans_ail_init(struct xfs_mount *);
 void		xfs_trans_ail_destroy(struct xfs_mount *);
 void		xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
-- 
1.5.6.2