2 * Copyright (c) International Business Machines Corp., 2000-2002
3 * Portions Copyright (c) Christoph Hellwig, 2001-2002
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.
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.
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
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"
32 #define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */
35 * JFS-private inode information
37 struct jfs_inode_info
{
38 int fileset
; /* fileset number (always 16)*/
39 uint mode2
; /* jfs-specific mode */
40 pxd_t ixpxd
; /* inode extent descriptor */
41 dxd_t acl
; /* dxd describing acl */
42 dxd_t ea
; /* dxd describing ea */
43 time_t otime
; /* time created */
44 uint next_index
; /* next available directory entry index */
45 int acltype
; /* Type of ACL */
46 short btorder
; /* access order */
47 short btindex
; /* btpage entry index*/
48 struct inode
*ipimap
; /* inode map */
49 long cflag
; /* commit flags */
50 u16 bxflag
; /* xflag of pseudo buffer? */
51 unchar agno
; /* ag number */
52 signed char active_ag
; /* ag currently allocating from */
53 lid_t blid
; /* lid of pseudo buffer? */
54 lid_t atlhead
; /* anonymous tlock list head */
55 lid_t atltail
; /* anonymous tlock list tail */
56 struct list_head anon_inode_list
; /* inodes having anonymous txns */
58 * rdwrlock serializes xtree between reads & writes and synchronizes
59 * changes to special inodes. It's use would be redundant on
60 * directories since the i_sem taken in the VFS is sufficient.
62 struct rw_semaphore rdwrlock
;
64 * commit_sem serializes transaction processing on an inode.
65 * It must be taken after beginning a transaction (txBegin), since
66 * dirty inodes may be committed while a new transaction on the
67 * inode is blocked in txBegin or TxBeginAnon
69 struct semaphore commit_sem
;
70 lid_t xtlid
; /* lid of xtree lock on directory */
71 #ifdef CONFIG_JFS_POSIX_ACL
72 struct posix_acl
*i_acl
;
73 struct posix_acl
*i_default_acl
;
77 xtpage_t _xtroot
; /* 288: xtree root */
78 struct inomap
*_imap
; /* 4: inode map header */
81 struct dir_table_slot _table
[12]; /* 96: dir index */
82 dtroot_t _dtroot
; /* 288: dtree root */
85 unchar _unused
[16]; /* 16: */
87 unchar _inline
[128]; /* 128: inline symlink */
88 /* _inline_ea may overlay the last part of
89 * file._xtroot if maxentry = XTROOTINITSLOT
91 unchar _inline_ea
[128]; /* 128: inline extended attr */
94 struct inode vfs_inode
;
96 #define i_xtroot u.file._xtroot
97 #define i_imap u.file._imap
98 #define i_dirtable u.dir._table
99 #define i_dtroot u.dir._dtroot
100 #define i_inline u.link._inline
101 #define i_inline_ea u.link._inline_ea
103 #define JFS_ACL_NOT_CACHED ((void *)-1)
105 #define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock)
106 #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock)
107 #define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock)
108 #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock)
114 COMMIT_New
, /* never committed inode */
115 COMMIT_Nolink
, /* inode committed with zero link count */
116 COMMIT_Inlineea
, /* commit inode inline EA */
117 COMMIT_Freewmap
, /* free WMAP at iClose() */
118 COMMIT_Dirty
, /* Inode is really dirty */
119 COMMIT_Dirtable
, /* commit changes to di_dirtable */
120 COMMIT_Stale
, /* data extent is no longer valid */
121 COMMIT_Synclist
, /* metadata pages on group commit synclist */
124 #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag))
125 #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag))
126 #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag))
127 #define test_and_clear_cflag(flag, ip) \
128 test_and_clear_bit(flag, &(JFS_IP(ip)->cflag))
130 * JFS-private superblock information.
133 unsigned long mntflag
; /* 4: aggregate attributes */
134 struct inode
*ipbmap
; /* 4: block map inode */
135 struct inode
*ipaimap
; /* 4: aggregate inode map inode */
136 struct inode
*ipaimap2
; /* 4: secondary aimap inode */
137 struct inode
*ipimap
; /* 4: aggregate inode map inode */
138 struct jfs_log
*log
; /* 4: log */
139 short bsize
; /* 2: logical block size */
140 short l2bsize
; /* 2: log2 logical block size */
141 short nbperpage
; /* 2: blocks per page */
142 short l2nbperpage
; /* 2: log2 blocks per page */
143 short l2niperblk
; /* 2: log2 inodes per page */
144 u32 logdev
; /* 2: external log device */
145 uint aggregate
; /* volume identifier in log record */
146 pxd_t logpxd
; /* 8: pxd describing log */
147 pxd_t fsckpxd
; /* 8: pxd describing fsck wkspc */
148 pxd_t ait2
; /* 8: pxd describing AIT copy */
149 char uuid
[16]; /* 16: 128-bit uuid for volume */
150 char loguuid
[16]; /* 16: 128-bit uuid for log */
151 /* Formerly in ipimap */
152 uint gengen
; /* 4: inode generation generator*/
153 uint inostamp
; /* 4: shows inode belongs to fileset*/
155 /* Formerly in ipbmap */
156 struct bmap
*bmap
; /* 4: incore bmap descriptor */
157 struct nls_table
*nls_tab
; /* 4: current codepage */
158 uint state
; /* 4: mount/recovery state */
161 static inline struct jfs_inode_info
*JFS_IP(struct inode
*inode
)
163 return list_entry(inode
, struct jfs_inode_info
, vfs_inode
);
166 static inline struct jfs_sb_info
*JFS_SBI(struct super_block
*sb
)
168 return sb
->s_fs_info
;
171 static inline int isReadOnly(struct inode
*inode
)
173 if (JFS_SBI(inode
->i_sb
)->log
)
178 #endif /* _H_JFS_INCORE */