| 1 |
1275 |
phoenix |
/*
|
| 2 |
|
|
* Copyright (c) International Business Machines Corp., 2000-2003
|
| 3 |
|
|
* Portions Copyright (c) Christoph Hellwig, 2001-2002
|
| 4 |
|
|
*
|
| 5 |
|
|
* This program is free software; you can redistribute it and/or modify
|
| 6 |
|
|
* it under the terms of the GNU General Public License as published by
|
| 7 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
| 8 |
|
|
* (at your option) any later version.
|
| 9 |
|
|
*
|
| 10 |
|
|
* This program is distributed in the hope that it will be useful,
|
| 11 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
| 13 |
|
|
* the GNU General Public License for more details.
|
| 14 |
|
|
*
|
| 15 |
|
|
* You should have received a copy of the GNU General Public License
|
| 16 |
|
|
* along with this program; if not, write to the Free Software
|
| 17 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 18 |
|
|
*/
|
| 19 |
|
|
#ifndef _H_JFS_INCORE
|
| 20 |
|
|
#define _H_JFS_INCORE
|
| 21 |
|
|
|
| 22 |
|
|
#include <linux/rwsem.h>
|
| 23 |
|
|
#include <linux/slab.h>
|
| 24 |
|
|
#include <asm/bitops.h>
|
| 25 |
|
|
#include "jfs_types.h"
|
| 26 |
|
|
#include "jfs_xtree.h"
|
| 27 |
|
|
#include "jfs_dtree.h"
|
| 28 |
|
|
|
| 29 |
|
|
/*
|
| 30 |
|
|
* JFS magic number
|
| 31 |
|
|
*/
|
| 32 |
|
|
#define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */
|
| 33 |
|
|
|
| 34 |
|
|
/*
|
| 35 |
|
|
* JFS-private inode information
|
| 36 |
|
|
*/
|
| 37 |
|
|
struct jfs_inode_info {
|
| 38 |
|
|
struct inode *inode; /* pointer back to fs-independent inode */
|
| 39 |
|
|
int fileset; /* fileset number (always 16)*/
|
| 40 |
|
|
uint mode2; /* jfs-specific mode */
|
| 41 |
|
|
pxd_t ixpxd; /* inode extent descriptor */
|
| 42 |
|
|
dxd_t acl; /* dxd describing acl */
|
| 43 |
|
|
dxd_t ea; /* dxd describing ea */
|
| 44 |
|
|
time_t otime; /* time created */
|
| 45 |
|
|
uint next_index; /* next available directory entry index */
|
| 46 |
|
|
int acltype; /* Type of ACL */
|
| 47 |
|
|
short btorder; /* access order */
|
| 48 |
|
|
short btindex; /* btpage entry index*/
|
| 49 |
|
|
struct inode *ipimap; /* inode map */
|
| 50 |
|
|
long cflag; /* commit flags */
|
| 51 |
|
|
u16 bxflag; /* xflag of pseudo buffer? */
|
| 52 |
|
|
unchar agno; /* ag number */
|
| 53 |
|
|
signed char active_ag; /* ag currently allocating from */
|
| 54 |
|
|
lid_t blid; /* lid of pseudo buffer? */
|
| 55 |
|
|
lid_t atlhead; /* anonymous tlock list head */
|
| 56 |
|
|
lid_t atltail; /* anonymous tlock list tail */
|
| 57 |
|
|
struct list_head anon_inode_list; /* inodes having anonymous txns */
|
| 58 |
|
|
/*
|
| 59 |
|
|
* rdwrlock serializes xtree between reads & writes and synchronizes
|
| 60 |
|
|
* changes to special inodes. It's use would be redundant on
|
| 61 |
|
|
* directories since the i_sem taken in the VFS is sufficient.
|
| 62 |
|
|
*/
|
| 63 |
|
|
struct rw_semaphore rdwrlock;
|
| 64 |
|
|
/*
|
| 65 |
|
|
* commit_sem serializes transaction processing on an inode.
|
| 66 |
|
|
* It must be taken after beginning a transaction (txBegin), since
|
| 67 |
|
|
* dirty inodes may be committed while a new transaction on the
|
| 68 |
|
|
* inode is blocked in txBegin or TxBeginAnon
|
| 69 |
|
|
*/
|
| 70 |
|
|
struct semaphore commit_sem;
|
| 71 |
|
|
lid_t xtlid; /* lid of xtree lock on directory */
|
| 72 |
|
|
union {
|
| 73 |
|
|
struct {
|
| 74 |
|
|
xtpage_t _xtroot; /* 288: xtree root */
|
| 75 |
|
|
struct inomap *_imap; /* 4: inode map header */
|
| 76 |
|
|
} file;
|
| 77 |
|
|
struct {
|
| 78 |
|
|
struct dir_table_slot _table[12]; /* 96: dir index */
|
| 79 |
|
|
dtroot_t _dtroot; /* 288: dtree root */
|
| 80 |
|
|
} dir;
|
| 81 |
|
|
struct {
|
| 82 |
|
|
unchar _unused[16]; /* 16: */
|
| 83 |
|
|
dxd_t _dxd; /* 16: */
|
| 84 |
|
|
unchar _inline[128]; /* 128: inline symlink */
|
| 85 |
|
|
/* _inline_ea may overlay the last part of
|
| 86 |
|
|
* file._xtroot if maxentry = XTROOTINITSLOT
|
| 87 |
|
|
*/
|
| 88 |
|
|
unchar _inline_ea[128]; /* 128: inline extended attr */
|
| 89 |
|
|
} link;
|
| 90 |
|
|
} u;
|
| 91 |
|
|
};
|
| 92 |
|
|
#define i_xtroot u.file._xtroot
|
| 93 |
|
|
#define i_imap u.file._imap
|
| 94 |
|
|
#define i_dirtable u.dir._table
|
| 95 |
|
|
#define i_dtroot u.dir._dtroot
|
| 96 |
|
|
#define i_inline u.link._inline
|
| 97 |
|
|
#define i_inline_ea u.link._inline_ea
|
| 98 |
|
|
|
| 99 |
|
|
|
| 100 |
|
|
#define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock)
|
| 101 |
|
|
#define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock)
|
| 102 |
|
|
#define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock)
|
| 103 |
|
|
#define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock)
|
| 104 |
|
|
|
| 105 |
|
|
/*
|
| 106 |
|
|
* cflag
|
| 107 |
|
|
*/
|
| 108 |
|
|
enum cflags {
|
| 109 |
|
|
COMMIT_New, /* never committed inode */
|
| 110 |
|
|
COMMIT_Nolink, /* inode committed with zero link count */
|
| 111 |
|
|
COMMIT_Inlineea, /* commit inode inline EA */
|
| 112 |
|
|
COMMIT_Freewmap, /* free WMAP at iClose() */
|
| 113 |
|
|
COMMIT_Dirty, /* Inode is really dirty */
|
| 114 |
|
|
COMMIT_Dirtable, /* commit changes to di_dirtable */
|
| 115 |
|
|
COMMIT_Stale, /* data extent is no longer valid */
|
| 116 |
|
|
COMMIT_Synclist, /* metadata pages on group commit synclist */
|
| 117 |
|
|
COMMIT_Syncdata, /* Data must be synced before inode committed */
|
| 118 |
|
|
};
|
| 119 |
|
|
|
| 120 |
|
|
#define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag))
|
| 121 |
|
|
#define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag))
|
| 122 |
|
|
#define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag))
|
| 123 |
|
|
#define test_and_clear_cflag(flag, ip) \
|
| 124 |
|
|
test_and_clear_bit(flag, &(JFS_IP(ip)->cflag))
|
| 125 |
|
|
/*
|
| 126 |
|
|
* JFS-private superblock information.
|
| 127 |
|
|
*/
|
| 128 |
|
|
struct jfs_sb_info {
|
| 129 |
|
|
unsigned long mntflag; /* aggregate attributes */
|
| 130 |
|
|
struct inode *ipbmap; /* block map inode */
|
| 131 |
|
|
struct inode *ipaimap; /* aggregate inode map inode */
|
| 132 |
|
|
struct inode *ipaimap2; /* secondary aimap inode */
|
| 133 |
|
|
struct inode *ipimap; /* aggregate inode map inode */
|
| 134 |
|
|
struct jfs_log *log; /* log */
|
| 135 |
|
|
short bsize; /* logical block size */
|
| 136 |
|
|
short l2bsize; /* log2 logical block size */
|
| 137 |
|
|
short nbperpage; /* blocks per page */
|
| 138 |
|
|
short l2nbperpage; /* log2 blocks per page */
|
| 139 |
|
|
short l2niperblk; /* log2 inodes per page */
|
| 140 |
|
|
kdev_t logdev; /* external log device */
|
| 141 |
|
|
uint aggregate; /* volume identifier in log record */
|
| 142 |
|
|
pxd_t logpxd; /* pxd describing log */
|
| 143 |
|
|
pxd_t fsckpxd; /* pxd describing fsck wkspc */
|
| 144 |
|
|
pxd_t ait2; /* pxd describing AIT copy */
|
| 145 |
|
|
char uuid[16]; /* 128-bit uuid for volume */
|
| 146 |
|
|
char loguuid[16]; /* 128-bit uuid for log */
|
| 147 |
|
|
/* Formerly in ipimap */
|
| 148 |
|
|
uint gengen; /* inode generation generator*/
|
| 149 |
|
|
uint inostamp; /* shows inode belongs to fileset*/
|
| 150 |
|
|
|
| 151 |
|
|
/* Formerly in ipbmap */
|
| 152 |
|
|
struct bmap *bmap; /* incore bmap descriptor */
|
| 153 |
|
|
struct nls_table *nls_tab; /* current codepage */
|
| 154 |
|
|
uint state; /* mount/recovery state */
|
| 155 |
|
|
unsigned long flag; /* mount time flags */
|
| 156 |
|
|
uint p_state; /* state prior to going no integrity */
|
| 157 |
|
|
};
|
| 158 |
|
|
|
| 159 |
|
|
static inline struct jfs_inode_info *JFS_IP(struct inode *inode)
|
| 160 |
|
|
{
|
| 161 |
|
|
return inode->u.generic_ip;
|
| 162 |
|
|
}
|
| 163 |
|
|
|
| 164 |
|
|
static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb)
|
| 165 |
|
|
{
|
| 166 |
|
|
return sb->u.generic_sbp;
|
| 167 |
|
|
}
|
| 168 |
|
|
|
| 169 |
|
|
static inline int isReadOnly(struct inode *inode)
|
| 170 |
|
|
{
|
| 171 |
|
|
if (JFS_SBI(inode->i_sb)->log)
|
| 172 |
|
|
return 0;
|
| 173 |
|
|
return 1;
|
| 174 |
|
|
}
|
| 175 |
|
|
|
| 176 |
|
|
/*
|
| 177 |
|
|
* Allocating and freeing the structure
|
| 178 |
|
|
*/
|
| 179 |
|
|
extern kmem_cache_t *jfs_inode_cachep;
|
| 180 |
|
|
extern int alloc_jfs_inode(struct inode *);
|
| 181 |
|
|
|
| 182 |
|
|
#define free_jfs_inode(inode) \
|
| 183 |
|
|
kmem_cache_free(jfs_inode_cachep, (inode)->u.generic_ip)
|
| 184 |
|
|
|
| 185 |
|
|
#endif /* _H_JFS_INCORE */
|
