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From: Allison Henderson <allison.henderson@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH v15 07/22] xfs: Add helper xfs_attr_node_addname_find_attr
Date: Thu, 18 Feb 2021 09:53:33 -0700	[thread overview]
Message-ID: <20210218165348.4754-8-allison.henderson@oracle.com> (raw)
In-Reply-To: <20210218165348.4754-1-allison.henderson@oracle.com>

This patch separates the first half of xfs_attr_node_addname into a
helper function xfs_attr_node_addname_find_attr.  It also replaces the
restart goto with with an EAGAIN return code driven by a loop in the
calling function.  This looks odd now, but will clean up nicly once we
introduce the state machine.  It will also enable hoisting the last
state out of xfs_attr_node_addname with out having to plumb in a "done"
parameter to know if we need to move to the next state or not.

Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
---
 fs/xfs/libxfs/xfs_attr.c | 80 ++++++++++++++++++++++++++++++------------------
 1 file changed, 51 insertions(+), 29 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index bee8d3fb..4333b61 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -52,7 +52,10 @@ STATIC int xfs_attr_leaf_hasname(struct xfs_da_args *args, struct xfs_buf **bp);
  * Internal routines when attribute list is more than one block.
  */
 STATIC int xfs_attr_node_get(xfs_da_args_t *args);
-STATIC int xfs_attr_node_addname(xfs_da_args_t *args);
+STATIC int xfs_attr_node_addname(struct xfs_da_args *args,
+				 struct xfs_da_state *state);
+STATIC int xfs_attr_node_addname_find_attr(struct xfs_da_args *args,
+				 struct xfs_da_state **state);
 STATIC int xfs_attr_node_removename(xfs_da_args_t *args);
 STATIC int xfs_attr_node_addname_work(struct xfs_da_args *args);
 STATIC int xfs_attr_node_hasname(xfs_da_args_t *args,
@@ -265,6 +268,7 @@ xfs_attr_set_args(
 	struct xfs_da_args	*args)
 {
 	struct xfs_inode	*dp = args->dp;
+	struct xfs_da_state     *state;
 	int			error;
 
 	/*
@@ -310,7 +314,14 @@ xfs_attr_set_args(
 			return error;
 	}
 
-	return xfs_attr_node_addname(args);
+	do {
+		error = xfs_attr_node_addname_find_attr(args, &state);
+		if (error)
+			return error;
+		error = xfs_attr_node_addname(args, state);
+	} while (error == -EAGAIN);
+
+	return error;
 }
 
 /*
@@ -883,42 +894,21 @@ xfs_attr_node_hasname(
  * External routines when attribute list size > geo->blksize
  *========================================================================*/
 
-/*
- * Add a name to a Btree-format attribute list.
- *
- * This will involve walking down the Btree, and may involve splitting
- * leaf nodes and even splitting intermediate nodes up to and including
- * the root node (a special case of an intermediate node).
- *
- * "Remote" attribute values confuse the issue and atomic rename operations
- * add a whole extra layer of confusion on top of that.
- */
 STATIC int
-xfs_attr_node_addname(
-	struct xfs_da_args	*args)
+xfs_attr_node_addname_find_attr(
+	struct xfs_da_args	*args,
+	struct xfs_da_state     **state)
 {
-	struct xfs_da_state	*state;
-	struct xfs_da_state_blk	*blk;
-	struct xfs_inode	*dp;
-	int			retval, error;
-
-	trace_xfs_attr_node_addname(args);
+	int			retval;
 
 	/*
-	 * Fill in bucket of arguments/results/context to carry around.
-	 */
-	dp = args->dp;
-restart:
-	/*
 	 * Search to see if name already exists, and get back a pointer
 	 * to where it should go.
 	 */
-	retval = xfs_attr_node_hasname(args, &state);
+	retval = xfs_attr_node_hasname(args, state);
 	if (retval != -ENOATTR && retval != -EEXIST)
 		goto out;
 
-	blk = &state->path.blk[ state->path.active-1 ];
-	ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
 	if (retval == -ENOATTR && (args->attr_flags & XATTR_REPLACE))
 		goto out;
 	if (retval == -EEXIST) {
@@ -941,6 +931,38 @@ xfs_attr_node_addname(
 		args->rmtvaluelen = 0;
 	}
 
+	return 0;
+out:
+	if (*state)
+		xfs_da_state_free(*state);
+	return retval;
+}
+
+/*
+ * Add a name to a Btree-format attribute list.
+ *
+ * This will involve walking down the Btree, and may involve splitting
+ * leaf nodes and even splitting intermediate nodes up to and including
+ * the root node (a special case of an intermediate node).
+ *
+ * "Remote" attribute values confuse the issue and atomic rename operations
+ * add a whole extra layer of confusion on top of that.
+ */
+STATIC int
+xfs_attr_node_addname(
+	struct xfs_da_args	*args,
+	struct xfs_da_state	*state)
+{
+	struct xfs_da_state_blk	*blk;
+	struct xfs_inode	*dp;
+	int			retval, error;
+
+	trace_xfs_attr_node_addname(args);
+
+	dp = args->dp;
+	blk = &state->path.blk[state->path.active-1];
+	ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
+
 	retval = xfs_attr3_leaf_add(blk->bp, state->args);
 	if (retval == -ENOSPC) {
 		if (state->path.active == 1) {
@@ -966,7 +988,7 @@ xfs_attr_node_addname(
 			if (error)
 				goto out;
 
-			goto restart;
+			return -EAGAIN;
 		}
 
 		/*
-- 
2.7.4


  parent reply	other threads:[~2021-02-18 18:48 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-18 16:53 [PATCH v15 00/22] xfs: Delayed Attributes Allison Henderson
2021-02-18 16:53 ` [PATCH v15 01/22] xfs: Add helper xfs_attr_node_remove_step Allison Henderson
2021-02-24 15:03   ` Brian Foster
2021-02-25  6:17     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 02/22] xfs: Add xfs_attr_node_remove_cleanup Allison Henderson
2021-02-24 15:03   ` Brian Foster
2021-02-25  6:17     ` Allison Henderson
2021-02-26  3:00   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 03/22] xfs: Hoist transaction handling in xfs_attr_node_remove_step Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:02   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 04/22] xfs: Hoist xfs_attr_set_shortform Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:03   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 05/22] xfs: Add helper xfs_attr_set_fmt Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:07   ` Darrick J. Wong
2021-02-27  0:49     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 06/22] xfs: Separate xfs_attr_node_addname and xfs_attr_node_addname_work Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  4:02   ` Darrick J. Wong
2021-02-27  0:54     ` Allison Henderson
2021-03-01 18:00       ` Darrick J. Wong
2021-03-02  8:26         ` Allison Henderson
2021-02-18 16:53 ` Allison Henderson [this message]
2021-02-24 15:04   ` [PATCH v15 07/22] xfs: Add helper xfs_attr_node_addname_find_attr Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  4:06   ` Darrick J. Wong
2021-02-27  0:54     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 08/22] xfs: Hoist xfs_attr_node_addname Allison Henderson
2021-02-24 18:42   ` Brian Foster
2021-02-25  6:19     ` Allison Henderson
2021-03-01 18:05   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 09/22] xfs: Hoist xfs_attr_leaf_addname Allison Henderson
2021-02-24 18:42   ` Brian Foster
2021-02-25  6:19     ` Allison Henderson
2021-02-25 14:20       ` Brian Foster
2021-03-01 18:19   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 10/22] xfs: Hoist node transaction handling Allison Henderson
2021-02-24 18:43   ` Brian Foster
2021-02-25  6:20     ` Allison Henderson
2021-03-01 18:20   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 11/22] xfs: Add delay ready attr remove routines Allison Henderson
2021-02-24 18:45   ` Brian Foster
2021-02-25  7:01     ` Allison Henderson
2021-02-25 14:22       ` Brian Foster
2021-02-25 22:28         ` Allison Henderson
2021-02-28 15:39           ` Brian Foster
2021-03-02  8:26             ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 12/22] xfs: Add delay ready attr set routines Allison Henderson
2021-03-02  1:39   ` Darrick J. Wong
2021-02-18 16:53 ` [PATCH v15 13/22] xfs: Add state machine tracepoints Allison Henderson
2021-02-26  5:06   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 14/22] xfs: Rename __xfs_attr_rmtval_remove Allison Henderson
2021-02-18 16:53 ` [PATCH v15 15/22] xfs: Handle krealloc errors in xlog_recover_add_to_cont_trans Allison Henderson
2021-02-26  5:06   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 16/22] xfs: Set up infastructure for deferred attribute operations Allison Henderson
2021-02-26  4:58   ` Darrick J. Wong
2021-02-27  0:56     ` Allison Henderson
2021-03-02  7:13       ` Allison Henderson
2021-03-03 11:50         ` Brian Foster
2021-02-18 16:53 ` [PATCH v15 17/22] xfs: Skip flip flags for delayed attrs Allison Henderson
2021-02-26  5:02   ` Darrick J. Wong
2021-02-27  0:56     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 18/22] xfs: Add xfs_attr_set_deferred and xfs_attr_remove_deferred Allison Henderson
2021-02-26  5:00   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 19/22] xfs: Remove unused xfs_attr_*_args Allison Henderson
2021-02-26  4:58   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 20/22] xfs: Add delayed attributes error tag Allison Henderson
2021-02-18 16:53 ` [PATCH v15 21/22] xfs: Add delattr mount option Allison Henderson
2021-02-26  4:29   ` Darrick J. Wong
2021-02-27  0:55     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 22/22] xfs: Merge xfs_delattr_context into xfs_attr_item Allison Henderson

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