Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...

[mv-sheeva.git] / fs / ceph / dir.c

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index fa7ca04ee816e79b8d8447c9634f27d04dee2ba5..0bc68de8edd7baa27af0de76cdae1f6eb1e29fea 100644 (file)
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1224,6 +1224,26 @@ void ceph_dentry_lru_del(struct dentry *dn)
        }
 }
 
+/*
+ * Return name hash for a given dentry.  This is dependent on
+ * the parent directory's hash function.
+ */
+unsigned ceph_dentry_hash(struct dentry *dn)
+{
+       struct inode *dir = dn->d_parent->d_inode;
+       struct ceph_inode_info *dci = ceph_inode(dir);
+
+       switch (dci->i_dir_layout.dl_dir_hash) {
+       case 0: /* for backward compat */
+       case CEPH_STR_HASH_LINUX:
+               return dn->d_name.hash;
+
+       default:
+               return ceph_str_hash(dci->i_dir_layout.dl_dir_hash,
+                                    dn->d_name.name, dn->d_name.len);
+       }
+}
+
 const struct file_operations ceph_dir_fops = {
        .read = ceph_read_dir,
        .readdir = ceph_readdir,