From 6ff958edbf39c014eb06b65ad25b736be08c4e63 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@suse.cz>
Date: Thu, 18 Oct 2007 03:07:02 -0700
Subject: fuse: add atomic open+truncate support

This patch allows fuse filesystems to implement open(..., O_TRUNC) as a single
request, instead of separate truncate and open requests.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/fuse/dir.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'fs/fuse/dir.c')

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 537d38bee13..052327bd6c9 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1083,6 +1083,9 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr,
 			return err;
 	}
 
+	if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc)
+		return 0;
+
 	if (attr->ia_valid & ATTR_SIZE) {
 		unsigned long limit;
 		if (IS_SWAPFILE(inode))
-- 
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