tmpfs not support O_DIRECT, when user open with O_DIRECT , the errno
-EINVAL return to userspace by open_check_o_direct, but the file has
been created, it's a strange thing. Add a checking for tmpfs that can
avoid creating that file.
Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
---
fs/namei.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/namei.c b/fs/namei.c
index ddb6a7c..a2a8cb9 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3106,6 +3106,10 @@ static int lookup_open(struct nameidata *nd, struct path *path,
if (unlikely(IS_DEADDIR(dir_inode)))
return -ENOENT;
+ if (unlikely(open_flag & (O_CREAT | O_DIRECT) &&
+ strcmp(dir->d_sb->s_type->name, "tmpfs") == 0))
+ return -EINVAL;
+
*opened &= ~FILE_CREATED;
dentry = d_lookup(dir, &nd->last);
for (;;) {
--
2.9.4
