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* Copyright (c) International Business Machines Corp., 2000-2002
*
* 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_INCORE
#define _H_JFS_INCORE
#include <linux/slab.h>
#include <asm/bitops.h>
#include "jfs_types.h"
#include "jfs_xtree.h"
#include "jfs_dtree.h"
/*
* JFS magic number
*/
#define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */
/*
* Due to header ordering problems this can't be in jfs_lock.h
*/
typedef struct jfs_rwlock {
struct rw_semaphore rw_sem;
atomic_t in_use; /* for hacked implementation of trylock */
} jfs_rwlock_t;
/*
* JFS-private inode information
*/
struct jfs_inode_info {
int fileset; /* fileset number (always 16)*/
uint mode2; /* jfs-specific mode */
pxd_t ixpxd; /* inode extent descriptor */
dxd_t acl; /* dxd describing acl */
dxd_t ea; /* dxd describing ea */
time_t otime; /* time created */
uint next_index; /* next available directory entry index */
int acltype; /* Type of ACL */
short btorder; /* access order */
short btindex; /* btpage entry index*/
struct inode *ipimap; /* inode map */
long cflag; /* commit flags */
u16 bxflag; /* xflag of pseudo buffer? */
unchar agno; /* ag number */
unchar pad; /* pad */
lid_t blid; /* lid of pseudo buffer? */
lid_t atlhead; /* anonymous tlock list head */
lid_t atltail; /* anonymous tlock list tail */
struct list_head anon_inode_list; /* inodes having anonymous txns */
struct list_head mp_list; /* metapages in inode's address space */
jfs_rwlock_t rdwrlock; /* read/write lock */
lid_t xtlid; /* lid of xtree lock on directory */
union {
struct {
xtpage_t _xtroot; /* 288: xtree root */
struct inomap *_imap; /* 4: inode map header */
} file;
struct {
dir_table_slot_t _table[12]; /* 96: directory index */
dtroot_t _dtroot; /* 288: dtree root */
} dir;
struct {
unchar _unused[16]; /* 16: */
dxd_t _dxd; /* 16: */
unchar _inline[128]; /* 128: inline symlink */
} link;
} u;
struct inode vfs_inode;
};
#define i_xtroot u.file._xtroot
#define i_imap u.file._imap
#define i_dirtable u.dir._table
#define i_dtroot u.dir._dtroot
#define i_inline u.link._inline
/*
* cflag
*/
enum cflags {
COMMIT_New, /* never committed inode */
COMMIT_Nolink, /* inode committed with zero link count */
COMMIT_Inlineea, /* commit inode inline EA */
COMMIT_Freewmap, /* free WMAP at iClose() */
COMMIT_Dirty, /* Inode is really dirty */
COMMIT_Holdlock, /* Hold the IWRITE_LOCK until commit is done */
COMMIT_Dirtable, /* commit changes to di_dirtable */
COMMIT_Stale, /* data extent is no longer valid */
COMMIT_Synclist, /* metadata pages on group commit synclist */
};
#define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag))
#define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag))
#define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag))
#define test_and_clear_cflag(flag, ip) \
test_and_clear_bit(flag, &(JFS_IP(ip)->cflag))
/*
* JFS-private superblock information.
*/
struct jfs_sb_info {
unsigned long mntflag; /* 4: aggregate attributes */
struct inode *ipbmap; /* 4: block map inode */
struct inode *ipaimap; /* 4: aggregate inode map inode */
struct inode *ipaimap2; /* 4: secondary aimap inode */
struct inode *ipimap; /* 4: aggregate inode map inode */
struct jfs_log *log; /* 4: log */
short bsize; /* 2: logical block size */
short l2bsize; /* 2: log2 logical block size */
short nbperpage; /* 2: blocks per page */
short l2nbperpage; /* 2: log2 blocks per page */
short l2niperblk; /* 2: log2 inodes per page */
kdev_t logdev; /* 2: external log device */
uint aggregate; /* volume identifier in log record */
pxd_t logpxd; /* 8: pxd describing log */
pxd_t ait2; /* 8: pxd describing AIT copy */
char uuid[16]; /* 16: 128-bit uuid for volume */
char loguuid[16]; /* 16: 128-bit uuid for log */
/* Formerly in ipimap */
uint gengen; /* 4: inode generation generator*/
uint inostamp; /* 4: shows inode belongs to fileset*/
/* Formerly in ipbmap */
struct bmap *bmap; /* 4: incore bmap descriptor */
struct nls_table *nls_tab; /* 4: current codepage */
struct inode *direct_inode; /* 4: inode for physical I/O */
struct address_space *direct_mapping; /* 4: mapping for physical I/O */
uint state; /* 4: mount/recovery state */
};
static inline struct jfs_inode_info *JFS_IP(struct inode *inode)
{
return list_entry(inode, struct jfs_inode_info, vfs_inode);
}
#define JFS_SBI(sb) ((struct jfs_sb_info *)(sb)->u.generic_sbp)
#define isReadOnly(ip) ((JFS_SBI((ip)->i_sb)->log) ? 0 : 1)
#endif /* _H_JFS_INCORE */
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