From: Maxim Patlasov <MPatlasov@parallels.com>
Date: Mon, 28 Apr 2014 12:19:22 +0000 (+0200)
Subject: fuse: update mtime on truncate(2)
X-Git-Tag: v3.15-rc5~13^2~11
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=009dd694e82098a703b8b5c8dd9f54c131dbb9b3;p=linux.git

fuse: update mtime on truncate(2)

Handling truncate(2), VFS doesn't set ATTR_MTIME bit in iattr structure;
only ATTR_SIZE bit is set. In-kernel fuse must handle the case by setting
mtime fields of struct fuse_setattr_in to "now" and set FATTR_MTIME bit
even though ATTR_MTIME was not set.

Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 5b4e035b364c..5e361b122526 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1678,6 +1678,8 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
 	if (is_truncate) {
 		fuse_set_nowrite(inode);
 		set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
+		if (trust_local_mtime && attr->ia_size != inode->i_size)
+			attr->ia_valid |= ATTR_MTIME;
 	}
 
 	memset(&inarg, 0, sizeof(inarg));