fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index 12d6023..6e58c4c 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -91,11 +91,14 @@
return acl;
}
-int v9fs_check_acl(struct inode *inode, int mask)
+int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
struct v9fs_session_info *v9ses;
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
v9ses = v9fs_inode2v9ses(inode);
if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
/*
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
index 59e18c2..7ef3ac9 100644
--- a/fs/9p/acl.h
+++ b/fs/9p/acl.h
@@ -16,7 +16,7 @@
#ifdef CONFIG_9P_FS_POSIX_ACL
extern int v9fs_get_acl(struct inode *, struct p9_fid *);
-extern int v9fs_check_acl(struct inode *inode, int mask);
+extern int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags);
extern int v9fs_acl_chmod(struct dentry *);
extern int v9fs_set_create_acl(struct dentry *,
struct posix_acl *, struct posix_acl *);
