1 files changed, 113 insertions, 0 deletions

diff --git a/fs/jfs/jfs_superblock.h b/fs/jfs/jfs_superblock.h
new file mode 100644
index 000000000000..ab0566f70cfa
--- /dev/null
+++ b/fs/jfs/jfs_superblock.h
@@ -0,0 +1,113 @@
+/*
+ *   Copyright (C) International Business Machines Corp., 2000-2003
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   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 02111-1307 USA
+ */
+#ifndef _H_JFS_SUPERBLOCK
+#define _H_JFS_SUPERBLOCK
+
+/*
+ * make the magic number something a human could read
+ */
+#define JFS_MAGIC       "JFS1"  /* Magic word */
+
+#define JFS_VERSION     2       /* Version number: Version 2 */
+
+#define LV_NAME_SIZE    11      /* MUST BE 11 for OS/2 boot sector */
+
+/* 
+ *      aggregate superblock 
+ *
+ * The name superblock is too close to super_block, so the name has been
+ * changed to jfs_superblock.  The utilities are still using the old name.
+ */
+struct jfs_superblock {
+        char s_magic[4];        /* 4: magic number */
+        __le32 s_version;       /* 4: version number */
+
+        __le64 s_size;          /* 8: aggregate size in hardware/LVM blocks;
+                                 * VFS: number of blocks
+                                 */
+        __le32 s_bsize;         /* 4: aggregate block size in bytes; 
+                                 * VFS: fragment size
+                                 */
+        __le16 s_l2bsize;       /* 2: log2 of s_bsize */
+        __le16 s_l2bfactor;     /* 2: log2(s_bsize/hardware block size) */
+        __le32 s_pbsize;        /* 4: hardware/LVM block size in bytes */
+        __le16 s_l2pbsize;      /* 2: log2 of s_pbsize */
+        __le16 pad;             /* 2: padding necessary for alignment */
+
+        __le32 s_agsize;        /* 4: allocation group size in aggr. blocks */
+
+        __le32 s_flag;          /* 4: aggregate attributes:
+                                 *    see jfs_filsys.h
+                                 */
+        __le32 s_state;         /* 4: mount/unmount/recovery state: 
+                                 *    see jfs_filsys.h
+                                 */
+        __le32 s_compress;              /* 4: > 0 if data compression */
+
+        pxd_t s_ait2;           /* 8: first extent of secondary
+                                 *    aggregate inode table
+                                 */
+
+        pxd_t s_aim2;           /* 8: first extent of secondary
+                                 *    aggregate inode map
+                                 */
+        __le32 s_logdev;                /* 4: device address of log */
+        __le32 s_logserial;     /* 4: log serial number at aggregate mount */
+        pxd_t s_logpxd;         /* 8: inline log extent */
+
+        pxd_t s_fsckpxd;        /* 8: inline fsck work space extent */
+
+        struct timestruc_t s_time;      /* 8: time last updated */
+
+        __le32 s_fsckloglen;    /* 4: Number of filesystem blocks reserved for
+                                 *    the fsck service log.  
+                                 *    N.B. These blocks are divided among the
+                                 *         versions kept.  This is not a per
+                                 *         version size.
+                                 *    N.B. These blocks are included in the 
+                                 *         length field of s_fsckpxd.
+                                 */
+        s8 s_fscklog;           /* 1: which fsck service log is most recent
+                                 *    0 => no service log data yet
+                                 *    1 => the first one
+                                 *    2 => the 2nd one
+                                 */
+        char s_fpack[11];       /* 11: file system volume name 
+                                 *     N.B. This must be 11 bytes to
+                                 *          conform with the OS/2 BootSector
+                                 *          requirements
+                                 *          Only used when s_version is 1
+                                 */
+
+        /* extendfs() parameter under s_state & FM_EXTENDFS */
+        __le64 s_xsize;         /* 8: extendfs s_size */
+        pxd_t s_xfsckpxd;       /* 8: extendfs fsckpxd */
+        pxd_t s_xlogpxd;        /* 8: extendfs logpxd */
+        /* - 128 byte boundary - */
+
+        char s_uuid[16];        /* 16: 128-bit uuid for volume */
+        char s_label[16];       /* 16: volume label */
+        char s_loguuid[16];     /* 16: 128-bit uuid for log device */
+
+};
+
+extern int readSuper(struct super_block *, struct buffer_head **);
+extern int updateSuper(struct super_block *, uint);
+extern void jfs_error(struct super_block *, const char *, ...);
+
+#endif /*_H_JFS_SUPERBLOCK */