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 5b4e035..5e361b1 100644 (file)
--- 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));