[PATCH] OCFS2: The Second Oracle Cluster Filesystem

The OCFS2 file system module.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/fs/ocfs2/ocfs1_fs_compat.h b/fs/ocfs2/ocfs1_fs_compat.h
new file mode 100644
index 000000000000..0b499bccec5a
--- /dev/null
+++ b/fs/ocfs2/ocfs1_fs_compat.h
@@ -0,0 +1,109 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ocfs1_fs_compat.h
+ *
+ * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
+ * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
+ * This allows an OCFS1 volume to see the partition and cleanly fail to
+ * mount it.
+ *
+ * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License, version 2,  as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef _OCFS1_FS_COMPAT_H
+#define _OCFS1_FS_COMPAT_H
+
+#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
+#define OCFS1_MAX_MOUNT_POINT_LEN            128
+#define OCFS1_MAX_VOL_ID_LENGTH               16
+#define OCFS1_MAX_VOL_LABEL_LEN               64
+#define OCFS1_MAX_CLUSTER_NAME_LEN            64
+
+#define OCFS1_MAJOR_VERSION              (2)
+#define OCFS1_MINOR_VERSION              (0)
+#define OCFS1_VOLUME_SIGNATURE           "OracleCFS"
+
+/*
+ * OCFS1 superblock.  Lives at sector 0.
+ */
+struct ocfs1_vol_disk_hdr
+{
+/*00*/  __u32 minor_version;
+        __u32 major_version;
+/*08*/  __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
+/*88*/  __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
+/*108*/ __u64 serial_num;
+/*110*/ __u64 device_size;
+        __u64 start_off;
+/*120*/ __u64 bitmap_off;
+        __u64 publ_off;
+/*130*/ __u64 vote_off;
+        __u64 root_bitmap_off;
+/*140*/ __u64 data_start_off;
+        __u64 root_bitmap_size;
+/*150*/ __u64 root_off;
+        __u64 root_size;
+/*160*/ __u64 cluster_size;
+        __u64 num_nodes;
+/*170*/ __u64 num_clusters;
+        __u64 dir_node_size;
+/*180*/ __u64 file_node_size;
+        __u64 internal_off;
+/*190*/ __u64 node_cfg_off;
+        __u64 node_cfg_size;
+/*1A0*/ __u64 new_cfg_off;
+        __u32 prot_bits;
+        __s32 excl_mount;
+/*1B0*/
+};
+
+
+struct ocfs1_disk_lock
+{
+/*00*/  __u32 curr_master;
+        __u8 file_lock;
+        __u8 compat_pad[3];  /* Not in orignal definition.  Used to
+                                make the already existing alignment
+                                explicit */
+        __u64 last_write_time;
+/*10*/  __u64 last_read_time;
+        __u32 writer_node_num;
+        __u32 reader_node_num;
+/*20*/  __u64 oin_node_map;
+        __u64 dlock_seq_num;
+/*30*/
+};
+
+/*
+ * OCFS1 volume label.  Lives at sector 1.
+ */
+struct ocfs1_vol_label
+{
+/*00*/  struct ocfs1_disk_lock disk_lock;
+/*30*/  __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
+/*70*/  __u16 label_len;
+/*72*/  __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
+/*82*/  __u16 vol_id_len;
+/*84*/  __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
+/*A4*/  __u16 cluster_name_len;
+/*A6*/
+};
+
+
+#endif /* _OCFS1_FS_COMPAT_H */
+