1 files changed, 79 insertions, 0 deletions

diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h
new file mode 100644
index 000000000000..371233419b07
--- /dev/null
+++ b/fs/gfs2/dir.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#ifndef __DIR_DOT_H__
+#define __DIR_DOT_H__
+
+#include <linux/dcache.h>
+
+struct inode;
+struct gfs2_inode;
+struct gfs2_inum;
+
+/**
+ * gfs2_filldir_t - Report a directory entry to the caller of gfs2_dir_read()
+ * @opaque: opaque data used by the function
+ * @name: the name of the directory entry
+ * @length: the length of the name
+ * @offset: the entry's offset in the directory
+ * @inum: the inode number the entry points to
+ * @type: the type of inode the entry points to
+ *
+ * Returns: 0 on success, 1 if buffer full
+ */
+
+typedef int (*gfs2_filldir_t) (void *opaque,
+                              const char *name, unsigned int length,
+                              u64 offset,
+                              struct gfs2_inum *inum, unsigned int type);
+
+int gfs2_dir_search(struct inode *dir, const struct qstr *filename,
+                    struct gfs2_inum *inum, unsigned int *type);
+int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
+                 const struct gfs2_inum *inum, unsigned int type);
+int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
+int gfs2_dir_read(struct inode *inode, u64 * offset, void *opaque,
+                  gfs2_filldir_t filldir);
+int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
+                   struct gfs2_inum *new_inum, unsigned int new_type);
+
+int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
+
+int gfs2_diradd_alloc_required(struct inode *dir,
+                               const struct qstr *filename);
+int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
+                            struct buffer_head **bhp);
+
+static inline u32 gfs2_disk_hash(const char *data, int len)
+{
+        return crc32_le((u32)~0, data, len) ^ (u32)~0;
+}
+
+
+static inline void gfs2_str2qstr(struct qstr *name, const char *fname)
+{
+        name->name = fname;
+        name->len = strlen(fname);
+        name->hash = gfs2_disk_hash(name->name, name->len);
+}
+
+/* N.B. This probably ought to take inum & type as args as well */
+static inline void gfs2_qstr2dirent(const struct qstr *name, u16 reclen, struct gfs2_dirent *dent)
+{
+        dent->de_inum.no_addr = cpu_to_be64(0);
+        dent->de_inum.no_formal_ino = cpu_to_be64(0);
+        dent->de_hash = cpu_to_be32(name->hash);
+        dent->de_rec_len = cpu_to_be16(reclen);
+        dent->de_name_len = cpu_to_be16(name->len);
+        dent->de_type = cpu_to_be16(0);
+        memset(dent->__pad, 0, sizeof(dent->__pad));
+        memcpy(dent + 1, name->name, name->len);
+}
+
+#endif /* __DIR_DOT_H__ */