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Commit a43db30c authored by Joel Becker's avatar Joel Becker Committed by Mark Fasheh
Browse files

ocfs2: silence -EEXIST from ocfs2_extent_map_insert/lookup 



Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
parent 8169cae5

fs/ocfs2/extent_map.c

+22 −7
Original line number Diff line number Diff line
@@ -298,7 +298,7 @@ static int ocfs2_extent_map_find_leaf(struct inode *inode, 


		ret = ocfs2_extent_map_insert(inode, rec,

					      le16_to_cpu(el->l_tree_depth));

		if (ret) {

		if (ret && (ret != -EEXIST)) {

			mlog_errno(ret);

			goto out_free;

		}
@@ -427,6 +427,11 @@ static int ocfs2_extent_map_insert_entry(struct ocfs2_extent_map *em, 
/*

 * Simple rule: on any return code other than -EAGAIN, anything left

 * in the insert_context will be freed.

 *

 * Simple rule #2: A return code of -EEXIST from this function or

 * its calls to ocfs2_extent_map_insert_entry() signifies that another

 * thread beat us to the insert.  It is not an actual error, but it

 * tells the caller we have no more work to do.

 */

static int ocfs2_extent_map_try_insert(struct inode *inode,

				       struct ocfs2_extent_rec *rec,
@@ -448,22 +453,32 @@ static int ocfs2_extent_map_try_insert(struct inode *inode, 
		goto out_unlock;

	}



	/* Since insert_entry failed, the map MUST have old_ent */

	old_ent = ocfs2_extent_map_lookup(em, le32_to_cpu(rec->e_cpos),

					  le32_to_cpu(rec->e_clusters), NULL,

					  NULL);

					  le32_to_cpu(rec->e_clusters),

					  NULL, NULL);



	BUG_ON(!old_ent);



	if (old_ent->e_tree_depth < tree_depth) {

		/* Another thread beat us to the lower tree_depth */

		ret = -EEXIST;

	if (old_ent->e_tree_depth < tree_depth)

		goto out_unlock;

	}



	if (old_ent->e_tree_depth == tree_depth) {

		/*

		 * Another thread beat us to this tree_depth.

		 * Let's make sure we agree with that thread (the

		 * extent_rec should be identical).

		 */

		if (!memcmp(rec, &old_ent->e_rec,

			    sizeof(struct ocfs2_extent_rec)))

			ret = 0;



		else

			/* FIXME: Should this be ESRCH/EBADR??? */

			ret = -EEXIST;



		goto out_unlock;

	}
@@ -599,7 +614,7 @@ static int ocfs2_extent_map_insert(struct inode *inode, 
						  tree_depth, &ctxt);

	} while (ret == -EAGAIN);



	if (ret < 0)

	if ((ret < 0) && (ret != -EEXIST))

		mlog_errno(ret);



	if (ctxt.left_ent)