fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 9ea22a5..3cfb2e9 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -870,11 +870,14 @@
return err;
}
-static int reiserfs_check_acl(struct inode *inode, int mask)
+static int reiserfs_check_acl(struct inode *inode, int mask, unsigned int flags)
{
struct posix_acl *acl;
int error = -EAGAIN; /* do regular unix permission checks by default */
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
+
acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
if (acl) {
@@ -951,8 +954,10 @@
return 0;
}
-int reiserfs_permission(struct inode *inode, int mask)
+int reiserfs_permission(struct inode *inode, int mask, unsigned int flags)
{
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
/*
* We don't do permission checks on the internal objects.
* Permissions are determined by the "owning" object.
@@ -965,9 +970,10 @@
* Stat data v1 doesn't support ACLs.
*/
if (get_inode_sd_version(inode) != STAT_DATA_V1)
- return generic_permission(inode, mask, reiserfs_check_acl);
+ return generic_permission(inode, mask, flags,
+ reiserfs_check_acl);
#endif
- return generic_permission(inode, mask, NULL);
+ return generic_permission(inode, mask, flags, NULL);
}
static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)