fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/afs/security.c b/fs/afs/security.c
index bb4ed14..f44b9d3 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -285,13 +285,16 @@
* - AFS ACLs are attached to directories only, and a file is controlled by its
* parent directory's ACL
*/
-int afs_permission(struct inode *inode, int mask)
+int afs_permission(struct inode *inode, int mask, unsigned int flags)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
afs_access_t uninitialized_var(access);
struct key *key;
int ret;
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
_enter("{{%x:%u},%lx},%x,",
vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
@@ -347,7 +350,7 @@
}
key_put(key);
- ret = generic_permission(inode, mask, NULL);
+ ret = generic_permission(inode, mask, flags, NULL);
_leave(" = %d", ret);
return ret;