[PATCH 01/24] libxfs: create attr log item opcodes and formats for parent pointers

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Update xfs_attr_defer_add to use the pptr-specific opcodes if it's
reading or writing parent pointers.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 libxfs/defer_item.c |   52 +++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 46 insertions(+), 6 deletions(-)


diff --git a/libxfs/defer_item.c b/libxfs/defer_item.c
index 9955e189d..8cdf57eac 100644
--- a/libxfs/defer_item.c
+++ b/libxfs/defer_item.c
@@ -676,21 +676,61 @@ xfs_attr_defer_add(
 	enum xfs_attr_defer_op	op)
 {
 	struct xfs_attr_intent	*new;
+	unsigned int		log_op = 0;
+	bool			is_pptr = args->attr_filter & XFS_ATTR_PARENT;
 
-	new = kmem_cache_zalloc(xfs_attr_intent_cache, GFP_NOFS | __GFP_NOFAIL);
+	if (is_pptr) {
+		ASSERT(xfs_has_parent(args->dp->i_mount));
+		ASSERT((args->attr_filter & ~XFS_ATTR_PARENT) != 0);
+		ASSERT(args->op_flags & XFS_DA_OP_LOGGED);
+		ASSERT(args->valuelen == sizeof(struct xfs_parent_rec));
+	}
+
+	new = kmem_cache_zalloc(xfs_attr_intent_cache,
+			GFP_NOFS | __GFP_NOFAIL);
 	new->xattri_da_args = args;
 
+	/* Compute log operation from the higher level op and namespace. */
 	switch (op) {
 	case XFS_ATTR_DEFER_SET:
-		new->xattri_op_flags = XFS_ATTRI_OP_FLAGS_SET;
-		new->xattri_dela_state = xfs_attr_init_add_state(args);
+		if (is_pptr)
+			log_op = XFS_ATTRI_OP_FLAGS_PPTR_SET;
+		else
+			log_op = XFS_ATTRI_OP_FLAGS_SET;
 		break;
 	case XFS_ATTR_DEFER_REPLACE:
-		new->xattri_op_flags = XFS_ATTRI_OP_FLAGS_REPLACE;
-		new->xattri_dela_state = xfs_attr_init_replace_state(args);
+		if (is_pptr)
+			log_op = XFS_ATTRI_OP_FLAGS_PPTR_REPLACE;
+		else
+			log_op = XFS_ATTRI_OP_FLAGS_REPLACE;
 		break;
 	case XFS_ATTR_DEFER_REMOVE:
-		new->xattri_op_flags = XFS_ATTRI_OP_FLAGS_REMOVE;
+		if (is_pptr)
+			log_op = XFS_ATTRI_OP_FLAGS_PPTR_REMOVE;
+		else
+			log_op = XFS_ATTRI_OP_FLAGS_REMOVE;
+		break;
+	default:
+		ASSERT(0);
+		break;
+	}
+	new->xattri_op_flags = log_op;
+
+	/* Set up initial attr operation state. */
+	switch (log_op) {
+	case XFS_ATTRI_OP_FLAGS_PPTR_SET:
+	case XFS_ATTRI_OP_FLAGS_SET:
+		new->xattri_dela_state = xfs_attr_init_add_state(args);
+		break;
+	case XFS_ATTRI_OP_FLAGS_PPTR_REPLACE:
+		ASSERT(args->new_valuelen == args->valuelen);
+		new->xattri_dela_state = xfs_attr_init_replace_state(args);
+		break;
+	case XFS_ATTRI_OP_FLAGS_REPLACE:
+		new->xattri_dela_state = xfs_attr_init_replace_state(args);
+		break;
+	case XFS_ATTRI_OP_FLAGS_PPTR_REMOVE:
+	case XFS_ATTRI_OP_FLAGS_REMOVE:
 		new->xattri_dela_state = xfs_attr_init_remove_state(args);
 		break;
 	}