xfs: Refactor xfs_da_state_alloc() helper

Every call to xfs_da_state_alloc() also requires setting up state->args
and state->mp

Change xfs_da_state_alloc() to receive an xfs_da_args_t as argument and
return a xfs_da_state_t with both args and mp already set.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: reduce struct typedef usage]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/libxfs/xfs_attr.c

@@ -739,7 +739,6 @@ xfs_attr_node_addname(
 	struct xfs_da_state	*state;
 	struct xfs_da_state_blk	*blk;
 	struct xfs_inode	*dp;
-	struct xfs_mount	*mp;
 	int			retval, error;
 
 	trace_xfs_attr_node_addname(args);
@@ -748,11 +747,8 @@ xfs_attr_node_addname(
 	 * Fill in bucket of arguments/results/context to carry around.
 	 */
 	dp = args->dp;
-	mp = dp->i_mount;
 restart:
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = mp;
+	state = xfs_da_state_alloc(args);
 
 	/*
 	 * Search to see if name already exists, and get back a pointer
@@ -899,9 +895,8 @@ restart:
 		 * attr, not the "new" one.
 		 */
 		args->attr_filter |= XFS_ATTR_INCOMPLETE;
-		state = xfs_da_state_alloc();
-		state->args = args;
-		state->mp = mp;
+		state = xfs_da_state_alloc(args);
+
 		state->inleaf = 0;
 		error = xfs_da3_node_lookup_int(state, &retval);
 		if (error)
@@ -975,9 +970,7 @@ xfs_attr_node_removename(
 	 * Tie a string around our finger to remind us where we are.
 	 */
 	dp = args->dp;
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = dp->i_mount;
+	state = xfs_da_state_alloc(args);
 
 	/*
 	 * Search to see if name exists, and get back a pointer to it.
@@ -1207,9 +1200,7 @@ xfs_attr_node_get(xfs_da_args_t *args)
 
 	trace_xfs_attr_node_get(args);
 
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = args->dp->i_mount;
+	state = xfs_da_state_alloc(args);
 
 	/*
 	 * Search to see if name exists, and get back a pointer to it.

fs/xfs/libxfs/xfs_da_btree.c

@@ -78,10 +78,16 @@ kmem_zone_t *xfs_da_state_zone;	/* anchor for state struct zone */
  * Allocate a dir-state structure.
  * We don't put them on the stack since they're large.
  */
-xfs_da_state_t *
-xfs_da_state_alloc(void)
+struct xfs_da_state *
+xfs_da_state_alloc(
+	struct xfs_da_args	*args)
 {
-	return kmem_cache_zalloc(xfs_da_state_zone, GFP_NOFS | __GFP_NOFAIL);
+	struct xfs_da_state	*state;
+
+	state = kmem_cache_zalloc(xfs_da_state_zone, GFP_NOFS | __GFP_NOFAIL);
+	state->args = args;
+	state->mp = args->dp->i_mount;
+	return state;
 }
 
 /*

fs/xfs/libxfs/xfs_da_btree.h

@@ -219,7 +219,7 @@ enum xfs_dacmp xfs_da_compname(struct xfs_da_args *args,
 				const unsigned char *name, int len);
 
 
-xfs_da_state_t *xfs_da_state_alloc(void);
+struct xfs_da_state *xfs_da_state_alloc(struct xfs_da_args *args);
 void xfs_da_state_free(xfs_da_state_t *state);
 
 void	xfs_da3_node_hdr_from_disk(struct xfs_mount *mp,

fs/xfs/libxfs/xfs_dir2_node.c

@@ -2015,9 +2015,7 @@ xfs_dir2_node_addname(
 	/*
 	 * Allocate and initialize the state (btree cursor).
 	 */
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = args->dp->i_mount;
+	state = xfs_da_state_alloc(args);
 	/*
 	 * Look up the name.  We're not supposed to find it, but
 	 * this gives us the insertion point.
@@ -2086,9 +2084,8 @@ xfs_dir2_node_lookup(
 	/*
 	 * Allocate and initialize the btree cursor.
 	 */
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = args->dp->i_mount;
+	state = xfs_da_state_alloc(args);
+
 	/*
 	 * Fill in the path to the entry in the cursor.
 	 */
@@ -2139,9 +2136,7 @@ xfs_dir2_node_removename(
 	/*
 	 * Allocate and initialize the btree cursor.
 	 */
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = args->dp->i_mount;
+	state = xfs_da_state_alloc(args);
 
 	/* Look up the entry we're deleting, set up the cursor. */
 	error = xfs_da3_node_lookup_int(state, &rval);
@@ -2206,9 +2201,7 @@ xfs_dir2_node_replace(
 	/*
 	 * Allocate and initialize the btree cursor.
 	 */
-	state = xfs_da_state_alloc();
-	state->args = args;
-	state->mp = args->dp->i_mount;
+	state = xfs_da_state_alloc(args);
 
 	/*
 	 * We have to save new inode number and ftype since

fs/xfs/scrub/dabtree.c

@@ -476,9 +476,7 @@ xchk_da_btree(
 	ds.dargs.whichfork = whichfork;
 	ds.dargs.trans = sc->tp;
 	ds.dargs.op_flags = XFS_DA_OP_OKNOENT;
-	ds.state = xfs_da_state_alloc();
-	ds.state->args = &ds.dargs;
-	ds.state->mp = mp;
+	ds.state = xfs_da_state_alloc(&ds.dargs);
 	ds.sc = sc;
 	ds.private = private;
 	if (whichfork == XFS_ATTR_FORK) {