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[3/7] iomap: fiemap should honor the FIEMAP_FLAG_SYNC flag

Message ID 1471131781-14107-4-git-send-email-hch@lst.de (mailing list archive)
State Accepted
Headers show

Commit Message

Christoph Hellwig Aug. 13, 2016, 11:42 p.m. UTC 
From: Dave Chinner <dchinner@redhat.com>

The flag is checked as supported, but then we do an unconditional
sync of the file, regardless of whether the flag is set or not. Make
the sync conditional on having the FIEMAP_FLAG_SYNC flag set.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
 fs/iomap.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/fs/iomap.c b/fs/iomap.c
index 74712e2..56c19e6 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -467,9 +467,11 @@  int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi,
 	if (ret)
 		return ret;
 
-	ret = filemap_write_and_wait(inode->i_mapping);
-	if (ret)
-		return ret;
+	if (fi->fi_flags & FIEMAP_FLAG_SYNC) {
+		ret = filemap_write_and_wait(inode->i_mapping);
+		if (ret)
+			return ret;
+	}
 
 	while (len > 0) {
 		ret = iomap_apply(inode, start, len, 0, ops, &ctx,