fs: provide rcu-walk aware permission i_ops

[linux-2.6-microblaze.git] / fs / nilfs2 / inode.c

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 71d4bc8..77b48c8 100644 (file)
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -785,15 +785,19 @@ out_err:
        return err;
 }
 
-int nilfs_permission(struct inode *inode, int mask)
+int nilfs_permission(struct inode *inode, int mask, unsigned int flags)
 {
-       struct nilfs_root *root = NILFS_I(inode)->i_root;
+       struct nilfs_root *root;
+
+       if (flags & IPERM_FLAG_RCU)
+               return -ECHILD;
 
+       root = NILFS_I(inode)->i_root;
        if ((mask & MAY_WRITE) && root &&
            root->cno != NILFS_CPTREE_CURRENT_CNO)
                return -EROFS; /* snapshot is not writable */
 
-       return generic_permission(inode, mask, NULL);
+       return generic_permission(inode, mask, flags, NULL);
 }
 
 int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode,