From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 16 Aug 2016 22:41:34 +0000 (+1000)
Subject: iomap: prepare iomap_fiemap for attribute mappings
X-Git-Tag: v4.9-rc1~31^2~93^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ac2dc058bce81b83631ad5accb90b8f4abe613b7;p=platform%2Fkernel%2Flinux-amlogic.git

iomap: prepare iomap_fiemap for attribute mappings

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

Signed-off-by: Dave Chinner <dchinner@redhat.com>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

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)