[PATCH 4/7] iomap: prepare iomap_fiemap for attribute mappings

[Christoph Hellwig]

From: Dave Chinner <dchinner at redhat.com>

By bassing through an -ENOENT, similar to the old XFS implementation of
FIEMAP_FLAG_XATTR.

Signed-off-by: Dave Chinner <dchinner at redhat.com>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 fs/iomap.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/iomap.c b/fs/iomap.c
index 56c19e6..d9d1f50 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -476,6 +476,9 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi,
 	while (len > 0) {
 		ret = iomap_apply(inode, start, len, 0, ops, &ctx,
 				iomap_fiemap_actor);
+		/* inode with no (attribute) mapping will give ENOENT */
+		if (ret == -ENOENT)
+			break;
 		if (ret < 0)
 			return ret;
 		if (ret == 0)
-- 
2.1.4