xfs: add more attribute tree trace points.

Added when debugging recent attribute tree problems to more finely
trace code execution through the maze of twisty passages that makes
up the attr code.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

fs/xfs/xfs_attr.c

@@ -1155,6 +1155,8 @@ xfs_attr_leaf_get(xfs_da_args_t *args)
 	struct xfs_buf *bp;
 	int error;
 
+	trace_xfs_attr_leaf_get(args);
+
 	args->blkno = 0;
 	error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
 					     XFS_ATTR_FORK);
@@ -1185,6 +1187,8 @@ xfs_attr_leaf_list(xfs_attr_list_context_t *context)
 	int error;
 	struct xfs_buf *bp;
 
+	trace_xfs_attr_leaf_list(context);
+
 	context->cursor->blkno = 0;
 	error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK);
 	if (error)
@@ -1653,6 +1657,8 @@ xfs_attr_fillstate(xfs_da_state_t *state)
 	xfs_da_state_blk_t *blk;
 	int level;
 
+	trace_xfs_attr_fillstate(state->args);
+
 	/*
 	 * Roll down the "path" in the state structure, storing the on-disk
 	 * block number for those buffers in the "path".
@@ -1699,6 +1705,8 @@ xfs_attr_refillstate(xfs_da_state_t *state)
 	xfs_da_state_blk_t *blk;
 	int level, error;
 
+	trace_xfs_attr_refillstate(state->args);
+
 	/*
 	 * Roll down the "path" in the state structure, storing the on-disk
 	 * block number for those buffers in the "path".
@@ -1755,6 +1763,8 @@ xfs_attr_node_get(xfs_da_args_t *args)
 	int error, retval;
 	int i;
 
+	trace_xfs_attr_node_get(args);
+
 	state = xfs_da_state_alloc();
 	state->args = args;
 	state->mp = args->dp->i_mount;
@@ -1804,6 +1814,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
 	int error, i;
 	struct xfs_buf *bp;
 
+	trace_xfs_attr_node_list(context);
+
 	cursor = context->cursor;
 	cursor->initted = 1;
 
@@ -1959,6 +1971,8 @@ xfs_attr_rmtval_get(xfs_da_args_t *args)
 	int nmap, error, tmp, valuelen, blkcnt, i;
 	xfs_dablk_t lblkno;
 
+	trace_xfs_attr_rmtval_get(args);
+
 	ASSERT(!(args->flags & ATTR_KERNOVAL));
 
 	mp = args->dp->i_mount;
@@ -2014,6 +2028,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
 	xfs_dablk_t lblkno;
 	int blkcnt, valuelen, nmap, error, tmp, committed;
 
+	trace_xfs_attr_rmtval_set(args);
+
 	dp = args->dp;
 	mp = dp->i_mount;
 	src = args->value;
@@ -2143,6 +2159,8 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args)
 	xfs_dablk_t lblkno;
 	int valuelen, blkcnt, nmap, error, done, committed;
 
+	trace_xfs_attr_rmtval_remove(args);
+
 	mp = args->dp->i_mount;
 
 	/*

fs/xfs/xfs_attr_leaf.c

@@ -57,7 +57,8 @@ STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block,
 				struct xfs_buf **bpp);
 STATIC int xfs_attr_leaf_add_work(struct xfs_buf *leaf_buffer,
 				  xfs_da_args_t *args, int freemap_index);
-STATIC void xfs_attr_leaf_compact(xfs_trans_t *tp, struct xfs_buf *leaf_buffer);
+STATIC void xfs_attr_leaf_compact(struct xfs_da_args *args,
+				  struct xfs_buf *leaf_buffer);
 STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state,
 						   xfs_da_state_blk_t *blk1,
 						   xfs_da_state_blk_t *blk2);
@@ -1071,7 +1072,7 @@ xfs_attr_leaf_add(
 	 * Compact the entries to coalesce free space.
 	 * This may change the hdr->count via dropping INCOMPLETE entries.
 	 */
-	xfs_attr_leaf_compact(args->trans, bp);
+	xfs_attr_leaf_compact(args, bp);
 
 	/*
 	 * After compaction, the block is guaranteed to have only one
@@ -1102,6 +1103,8 @@ xfs_attr_leaf_add_work(
 	xfs_mount_t *mp;
 	int tmp, i;
 
+	trace_xfs_attr_leaf_add_work(args);
+
 	leaf = bp->b_addr;
 	ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
 	hdr = &leaf->hdr;
@@ -1214,15 +1217,17 @@ xfs_attr_leaf_add_work(
  */
 STATIC void
 xfs_attr_leaf_compact(
-	struct xfs_trans *trans,
-	struct xfs_buf	*bp)
+	struct xfs_da_args	*args,
+	struct xfs_buf		*bp)
 {
-	xfs_attr_leafblock_t *leaf_s, *leaf_d;
-	xfs_attr_leaf_hdr_t *hdr_s, *hdr_d;
-	xfs_mount_t *mp;
-	char *tmpbuffer;
+	xfs_attr_leafblock_t	*leaf_s, *leaf_d;
+	xfs_attr_leaf_hdr_t	*hdr_s, *hdr_d;
+	struct xfs_trans	*trans = args->trans;
+	struct xfs_mount	*mp = trans->t_mountp;
+	char			*tmpbuffer;
+
+	trace_xfs_attr_leaf_compact(args);
 
-	mp = trans->t_mountp;
 	tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP);
 	ASSERT(tmpbuffer != NULL);
 	memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(mp));
@@ -1345,9 +1350,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
 		max  = be16_to_cpu(hdr2->firstused)
 						- sizeof(xfs_attr_leaf_hdr_t);
 		max -= be16_to_cpu(hdr2->count) * sizeof(xfs_attr_leaf_entry_t);
-		if (space > max) {
-			xfs_attr_leaf_compact(args->trans, blk2->bp);
-		}
+		if (space > max)
+			xfs_attr_leaf_compact(args, blk2->bp);
 
 		/*
 		 * Move high entries from leaf1 to low end of leaf2.
@@ -1378,9 +1382,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
 		max  = be16_to_cpu(hdr1->firstused)
 						- sizeof(xfs_attr_leaf_hdr_t);
 		max -= be16_to_cpu(hdr1->count) * sizeof(xfs_attr_leaf_entry_t);
-		if (space > max) {
-			xfs_attr_leaf_compact(args->trans, blk1->bp);
-		}
+		if (space > max)
+			xfs_attr_leaf_compact(args, blk1->bp);
 
 		/*
 		 * Move low entries from leaf2 to high end of leaf1.
@@ -1577,6 +1580,8 @@ xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action)
 	xfs_dablk_t blkno;
 	struct xfs_buf *bp;
 
+	trace_xfs_attr_leaf_toosmall(state->args);
+
 	/*
 	 * Check for the degenerate case of the block being over 50% full.
 	 * If so, it's not worth even looking to see if we might be able
@@ -1702,6 +1707,8 @@ xfs_attr_leaf_remove(
 	int tablesize, tmp, i;
 	xfs_mount_t *mp;
 
+	trace_xfs_attr_leaf_remove(args);
+
 	leaf = bp->b_addr;
 	ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
 	hdr = &leaf->hdr;

fs/xfs/xfs_da_btree.c

@@ -779,6 +779,8 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action)
 	xfs_dablk_t blkno;
 	struct xfs_buf *bp;
 
+	trace_xfs_da_node_toosmall(state->args);
+
 	/*
 	 * Check for the degenerate case of the block being over 50% full.
 	 * If so, it's not worth even looking to see if we might be able
@@ -900,6 +902,8 @@ xfs_da_fixhashpath(xfs_da_state_t *state, xfs_da_state_path_t *path)
 	xfs_dahash_t lasthash=0;
 	int level, count;
 
+	trace_xfs_da_fixhashpath(state->args);
+
 	level = path->active-1;
 	blk = &path->blk[ level ];
 	switch (blk->magic) {
@@ -1417,6 +1421,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
 	xfs_dablk_t blkno=0;
 	int level, error;
 
+	trace_xfs_da_path_shift(state->args);
+
 	/*
 	 * Roll up the Btree looking for the first block where our
 	 * current index is not at the edge of the block.  Note that

fs/xfs/xfs_trace.h

@@ -96,6 +96,8 @@ DEFINE_ATTR_LIST_EVENT(xfs_attr_list_full);
 DEFINE_ATTR_LIST_EVENT(xfs_attr_list_add);
 DEFINE_ATTR_LIST_EVENT(xfs_attr_list_wrong_blk);
 DEFINE_ATTR_LIST_EVENT(xfs_attr_list_notfound);
+DEFINE_ATTR_LIST_EVENT(xfs_attr_leaf_list);
+DEFINE_ATTR_LIST_EVENT(xfs_attr_node_list);
 
 DECLARE_EVENT_CLASS(xfs_perag_class,
 	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, int refcount,
@@ -1502,8 +1504,42 @@ DEFINE_DIR2_EVENT(xfs_dir2_node_replace);
 DEFINE_DIR2_EVENT(xfs_dir2_node_removename);
 DEFINE_DIR2_EVENT(xfs_dir2_node_to_leaf);
 
+DECLARE_EVENT_CLASS(xfs_attr_class,
+	TP_PROTO(struct xfs_da_args *args),
+	TP_ARGS(args),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_ino_t, ino)
+		__dynamic_array(char, name, args->namelen)
+		__field(int, namelen)
+		__field(int, valuelen)
+		__field(xfs_dahash_t, hashval)
+		__field(int, op_flags)
+	),
+	TP_fast_assign(
+		__entry->dev = VFS_I(args->dp)->i_sb->s_dev;
+		__entry->ino = args->dp->i_ino;
+		if (args->namelen)
+			memcpy(__get_str(name), args->name, args->namelen);
+		__entry->namelen = args->namelen;
+		__entry->valuelen = args->valuelen;
+		__entry->hashval = args->hashval;
+		__entry->op_flags = args->op_flags;
+	),
+	TP_printk("dev %d:%d ino 0x%llx name %.*s namelen %d valuelen %d "
+		  "hashval 0x%x op_flags %s",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->ino,
+		  __entry->namelen,
+		  __entry->namelen ? __get_str(name) : NULL,
+		  __entry->namelen,
+		  __entry->valuelen,
+		  __entry->hashval,
+		  __print_flags(__entry->op_flags, "|", XFS_DA_OP_FLAGS))
+)
+
 #define DEFINE_ATTR_EVENT(name) \
-DEFINE_EVENT(xfs_da_class, name, \
+DEFINE_EVENT(xfs_attr_class, name, \
 	TP_PROTO(struct xfs_da_args *args), \
 	TP_ARGS(args))
 DEFINE_ATTR_EVENT(xfs_attr_sf_add);
@@ -1517,10 +1553,14 @@ DEFINE_ATTR_EVENT(xfs_attr_sf_to_leaf);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_add);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_add_old);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_add_new);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_add_work);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_addname);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_create);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_compact);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_get);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_lookup);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_replace);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_remove);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_removename);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_split);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_split_before);
@@ -1532,12 +1572,21 @@ DEFINE_ATTR_EVENT(xfs_attr_leaf_to_sf);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_to_node);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_rebalance);
 DEFINE_ATTR_EVENT(xfs_attr_leaf_unbalance);
+DEFINE_ATTR_EVENT(xfs_attr_leaf_toosmall);
 
 DEFINE_ATTR_EVENT(xfs_attr_node_addname);
+DEFINE_ATTR_EVENT(xfs_attr_node_get);
 DEFINE_ATTR_EVENT(xfs_attr_node_lookup);
 DEFINE_ATTR_EVENT(xfs_attr_node_replace);
 DEFINE_ATTR_EVENT(xfs_attr_node_removename);
 
+DEFINE_ATTR_EVENT(xfs_attr_fillstate);
+DEFINE_ATTR_EVENT(xfs_attr_refillstate);
+
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_get);
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_set);
+DEFINE_ATTR_EVENT(xfs_attr_rmtval_remove);
+
 #define DEFINE_DA_EVENT(name) \
 DEFINE_EVENT(xfs_da_class, name, \
 	TP_PROTO(struct xfs_da_args *args), \
@@ -1556,9 +1605,12 @@ DEFINE_DA_EVENT(xfs_da_node_split);
 DEFINE_DA_EVENT(xfs_da_node_remove);
 DEFINE_DA_EVENT(xfs_da_node_rebalance);
 DEFINE_DA_EVENT(xfs_da_node_unbalance);
+DEFINE_DA_EVENT(xfs_da_node_toosmall);
 DEFINE_DA_EVENT(xfs_da_swap_lastblock);
 DEFINE_DA_EVENT(xfs_da_grow_inode);
 DEFINE_DA_EVENT(xfs_da_shrink_inode);
+DEFINE_DA_EVENT(xfs_da_fixhashpath);
+DEFINE_DA_EVENT(xfs_da_path_shift);
 
 DECLARE_EVENT_CLASS(xfs_dir2_space_class,
 	TP_PROTO(struct xfs_da_args *args, int idx),