From: Dave Chinner <dchinner@xxxxxxxxxx>
Clean up the final leaf/node states in xfs_attr_set_iter() to
further simplify the high level state machine and to set the
completion state correctly. As we are adding a separate state
for node format removal, we need to ensure that node formats
are collapsed back to shortformi or empty correctly.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Allison Henderson<allison.henderson@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_attr.c | 149 ++++++++++++++++++++++-----------------
fs/xfs/libxfs/xfs_attr.h | 12 ++--
fs/xfs/xfs_trace.h | 5 +-
3 files changed, 94 insertions(+), 72 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index d65abaead9a1..5707ac4f44a7 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 +444,77 @@ 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;
+}
+
+/*
+ * Shrink an attribute from leaf to shortform. Used by the node format remove
+ * path when the node format collapses to a single block and so we have to check
+ * if it can be collapsed further.
+ */
+static int
+xfs_attr_leaf_shrink(
+ struct xfs_da_args *args,
+ struct xfs_da_state *state)
+{
+ struct xfs_inode *dp = args->dp;
+ int error, forkoff;
+ struct xfs_buf *bp;
+
+ if (!xfs_attr_is_leaf(dp))
+ return 0;
+
+ /*
+ * Have to get rid of the copy of this dabuf in the state.
+ */
+ if (state) {
+ ASSERT(state->path.active == 1);
+ ASSERT(state->path.blk[0].bp);
+ state->path.blk[0].bp = NULL;
+ }
+
+ error = xfs_attr3_leaf_read(args->trans, args->dp, 0, &bp);
+ if (error)
+ return error;
+
+ 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 */
+ } else {
+ xfs_trans_brelse(args->trans, bp);
+ }
+
+ return error;
+}
+
/*
* Set the attribute specified in @args.
* This routine is meant to function as a delayed operation, and may return
@@ -456,9 +527,7 @@ 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 +618,16 @@ 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);
+ if (!error)
+ error = xfs_attr_leaf_shrink(args, NULL);
+ attr->xattri_dela_state = XFS_DAS_DONE;
break;
default:
ASSERT(0);
@@ -1269,8 +1322,8 @@ 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;
@@ -1311,38 +1364,6 @@ xfs_attr_node_addname_clear_incomplete(
return retval;
}
-/*
- * Shrink an attribute from leaf to shortform
- */
-STATIC int
-xfs_attr_node_shrink(
- struct xfs_da_args *args,
- struct xfs_da_state *state)
-{
- struct xfs_inode *dp = args->dp;
- int error, forkoff;
- struct xfs_buf *bp;
-
- /*
- * Have to get rid of the copy of this dabuf in the state.
- */
- ASSERT(state->path.active == 1);
- ASSERT(state->path.blk[0].bp);
- state->path.blk[0].bp = NULL;
-
- error = xfs_attr3_leaf_read(args->trans, args->dp, 0, &bp);
- if (error)
- return error;
-
- 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 */
- } else
- xfs_trans_brelse(args->trans, bp);
-
- return error;
-}
/*
* Mark an attribute entry INCOMPLETE and save pointers to the relevant buffers
@@ -1551,7 +1572,7 @@ xfs_attr_remove_iter(
* transaction.
*/
if (xfs_attr_is_leaf(dp))
- error = xfs_attr_node_shrink(args, state);
+ error = xfs_attr_leaf_shrink(args, state);
ASSERT(error != -EAGAIN);
break;
default:
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
