[PATCH 11/17] xfs: clean up final attr removal in xfs_attr_set_iter

Dave Chinner
2022-05-06T09:46:16Z

Clean up the final leaf/node states in xfs_attr_set_iter() to
further simplify the highe level state machine and to set the
completion state correctly.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Allison Henderson<allison.henderson@oracle.com>
---
fs/xfs/libxfs/xfs_attr.c | 72 +++++++++++++++++++++++-----------------
fs/xfs/libxfs/xfs_attr.h | 12 +++----
fs/xfs/xfs_trace.h | 5 +--
3 files changed, 50 insertions(+), 39 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index d65abaead9a1..3457847e97ef 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -61,7 +61,7 @@ STATIC int xfs_attr_node_get(xfs_da_args_t *args);
STATIC void xfs_attr_restore_rmt_blk(struct xfs_da_args *args);
static int xfs_attr_node_try_addname(struct xfs_attr_item *attr);
STATIC int xfs_attr_node_addname_find_attr(struct xfs_attr_item *attr);
-STATIC int xfs_attr_node_addname_clear_incomplete(struct xfs_attr_item *attr);
+STATIC int xfs_attr_node_remove_attr(struct xfs_attr_item *attr);
STATIC int xfs_attr_node_hasname(xfs_da_args_t *args,
struct xfs_da_state **state);
STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
@@ -444,6 +444,36 @@ xfs_attr_rmtval_alloc(
return error;
}

+/*
+ * Remove the original attr we have just replaced. This is dependent on the
+ * original lookup and insert placing the old attr in args->blkno/args->index
+ * and the new attr in args->blkno2/args->index2.
+ */
+static int
+xfs_attr_leaf_remove_attr(
+ struct xfs_attr_item *attr)
+{
+ struct xfs_da_args *args = attr->xattri_da_args;
+ struct xfs_inode *dp = args->dp;
+ struct xfs_buf *bp = NULL;
+ int forkoff;
+ int error;
+
+ error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno,
+ &bp);
+ if (error)
+ return error;
+
+ xfs_attr3_leaf_remove(bp, args);
+
+ forkoff = xfs_attr_shortform_allfit(bp, dp);
+ if (forkoff)
+ error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
+ /* bp is gone due to xfs_da_shrink_inode */
+
+ return error;
+}
+
/*
* Set the attribute specified in @args.
* This routine is meant to function as a delayed operation, and may return
@@ -456,9 +486,7 @@ xfs_attr_set_iter(
struct xfs_attr_item *attr)
{
struct xfs_da_args *args = attr->xattri_da_args;
- struct xfs_inode *dp = args->dp;
- struct xfs_buf *bp = NULL;
- int forkoff, error = 0;
+ int error = 0;

/* State machine switch */
next_state:
@@ -549,32 +577,14 @@ xfs_attr_set_iter(
attr->xattri_dela_state++;
break;

- case XFS_DAS_RD_LEAF:
- /*
- * This is the last step for leaf format. Read the block with
- * the old attr, remove the old attr, check for shortform
- * conversion and return.
- */
- error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno,
- &bp);
- if (error)
- return error;
-
- xfs_attr3_leaf_remove(bp, args);
-
- forkoff = xfs_attr_shortform_allfit(bp, dp);
- if (forkoff)
- error = xfs_attr3_leaf_to_shortform(bp, args, forkoff);
- /* bp is gone due to xfs_da_shrink_inode */
-
- return error;
+ case XFS_DAS_LEAF_REMOVE_ATTR:
+ error = xfs_attr_leaf_remove_attr(attr);
+ attr->xattri_dela_state = XFS_DAS_DONE;
+ break;

- case XFS_DAS_CLR_FLAG:
- /*
- * The last state for node format. Look up the old attr and
- * remove it.
- */
- error = xfs_attr_node_addname_clear_incomplete(attr);
+ case XFS_DAS_NODE_REMOVE_ATTR:
+ error = xfs_attr_node_remove_attr(attr);
+ attr->xattri_dela_state = XFS_DAS_DONE;
break;
default:
ASSERT(0);
@@ -1269,8 +1279,8 @@ xfs_attr_node_try_addname(
}

-STATIC int
-xfs_attr_node_addname_clear_incomplete(
+static int
+xfs_attr_node_remove_attr(
struct xfs_attr_item *attr)
{
struct xfs_da_args *args = attr->xattri_da_args;
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index d67535e4ce5a..c318260f17d4 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -451,21 +451,21 @@ enum xfs_delattr_state {
XFS_DAS_RM_NAME, /* Remove attr name */
XFS_DAS_RM_SHRINK, /* We are shrinking the tree */

- /* Leaf state set sequence */
+ /* Leaf state set/replace sequence */
XFS_DAS_LEAF_SET_RMT, /* set a remote xattr from a leaf */
XFS_DAS_LEAF_ALLOC_RMT, /* We are allocating remote blocks */
XFS_DAS_LEAF_REPLACE, /* Perform replace ops on a leaf */
XFS_DAS_LEAF_REMOVE_OLD, /* Start removing old attr from leaf */
XFS_DAS_LEAF_REMOVE_RMT, /* A rename is removing remote blocks */
- XFS_DAS_RD_LEAF, /* Read in the new leaf */
+ XFS_DAS_LEAF_REMOVE_ATTR, /* Remove the old attr from a leaf */

- /* Node state set sequence, must match leaf state above */
+ /* Node state set/replace sequence, must match leaf state above */
XFS_DAS_NODE_SET_RMT, /* set a remote xattr from a node */
XFS_DAS_NODE_ALLOC_RMT, /* We are allocating remote blocks */
XFS_DAS_NODE_REPLACE, /* Perform replace ops on a node */
XFS_DAS_NODE_REMOVE_OLD, /* Start removing old attr from node */
XFS_DAS_NODE_REMOVE_RMT, /* A rename is removing remote blocks */
- XFS_DAS_CLR_FLAG, /* Clear incomplete flag */
+ XFS_DAS_NODE_REMOVE_ATTR, /* Remove the old attr from a node */

XFS_DAS_DONE, /* finished operation */
};
@@ -483,13 +483,13 @@ enum xfs_delattr_state {
{ XFS_DAS_LEAF_REPLACE, "XFS_DAS_LEAF_REPLACE" }, \
{ XFS_DAS_LEAF_REMOVE_OLD, "XFS_DAS_LEAF_REMOVE_OLD" }, \
{ XFS_DAS_LEAF_REMOVE_RMT, "XFS_DAS_LEAF_REMOVE_RMT" }, \
- { XFS_DAS_RD_LEAF, "XFS_DAS_RD_LEAF" }, \
+ { XFS_DAS_LEAF_REMOVE_ATTR, "XFS_DAS_LEAF_REMOVE_ATTR" }, \
{ XFS_DAS_NODE_SET_RMT, "XFS_DAS_NODE_SET_RMT" }, \
{ XFS_DAS_NODE_ALLOC_RMT, "XFS_DAS_NODE_ALLOC_RMT" }, \
{ XFS_DAS_NODE_REPLACE, "XFS_DAS_NODE_REPLACE" }, \
{ XFS_DAS_NODE_REMOVE_OLD, "XFS_DAS_NODE_REMOVE_OLD" }, \
{ XFS_DAS_NODE_REMOVE_RMT, "XFS_DAS_NODE_REMOVE_RMT" }, \
- { XFS_DAS_CLR_FLAG, "XFS_DAS_CLR_FLAG" }, \
+ { XFS_DAS_NODE_REMOVE_ATTR, "XFS_DAS_NODE_REMOVE_ATTR" }, \
{ XFS_DAS_DONE, "XFS_DAS_DONE" }

/*
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 793d2a86ab2c..260760ce2d05 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -4141,13 +4141,14 @@ TRACE_DEFINE_ENUM(XFS_DAS_LEAF_ALLOC_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REPLACE);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_OLD);
TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_RMT);
-TRACE_DEFINE_ENUM(XFS_DAS_RD_LEAF);
+TRACE_DEFINE_ENUM(XFS_DAS_LEAF_REMOVE_ATTR);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_SET_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_ALLOC_RMT);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_REPLACE);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_OLD);
TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_RMT);
-TRACE_DEFINE_ENUM(XFS_DAS_CLR_FLAG);
+TRACE_DEFINE_ENUM(XFS_DAS_NODE_REMOVE_ATTR);
+TRACE_DEFINE_ENUM(XFS_DAS_DONE);

DECLARE_EVENT_CLASS(xfs_das_state_class,
TP_PROTO(int das, struct xfs_inode *ip),
--
2.35.1