2 * Copyright (C) International Business Machines Corp., 2000-2004
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 <linux/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 spinlock_t ag_lock; /* protects active_ag */
57 struct list_head anon_inode_list; /* inodes having anonymous txns */
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.
63 struct rw_semaphore rdwrlock;
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
70 struct semaphore commit_sem;
71 /* xattr_sem allows us to access the xattrs without taking i_sem */
72 struct rw_semaphore xattr_sem;
73 lid_t xtlid; /* lid of xtree lock on directory */
74 #ifdef CONFIG_JFS_POSIX_ACL
75 struct posix_acl *i_acl;
76 struct posix_acl *i_default_acl;
80 xtpage_t _xtroot; /* 288: xtree root */
81 struct inomap *_imap; /* 4: inode map header */
84 struct dir_table_slot _table[12]; /* 96: dir index */
85 dtroot_t _dtroot; /* 288: dtree root */
88 unchar _unused[16]; /* 16: */
90 unchar _inline[128]; /* 128: inline symlink */
91 /* _inline_ea may overlay the last part of
92 * file._xtroot if maxentry = XTROOTINITSLOT
94 unchar _inline_ea[128]; /* 128: inline extended attr */
97 u32 dev; /* will die when we get wide dev_t */
98 struct inode vfs_inode;
100 #define i_xtroot u.file._xtroot
101 #define i_imap u.file._imap
102 #define i_dirtable u.dir._table
103 #define i_dtroot u.dir._dtroot
104 #define i_inline u.link._inline
105 #define i_inline_ea u.link._inline_ea
107 #define JFS_ACL_NOT_CACHED ((void *)-1)
109 #define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock)
110 #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock)
111 #define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock)
112 #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock)
118 COMMIT_Nolink, /* inode committed with zero link count */
119 COMMIT_Inlineea, /* commit inode inline EA */
120 COMMIT_Freewmap, /* free WMAP at iClose() */
121 COMMIT_Dirty, /* Inode is really dirty */
122 COMMIT_Dirtable, /* commit changes to di_dirtable */
123 COMMIT_Stale, /* data extent is no longer valid */
124 COMMIT_Synclist, /* metadata pages on group commit synclist */
127 #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag))
128 #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag))
129 #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag))
130 #define test_and_clear_cflag(flag, ip) \
131 test_and_clear_bit(flag, &(JFS_IP(ip)->cflag))
133 * JFS-private superblock information.
136 struct super_block *sb; /* Point back to vfs super block */
137 unsigned long mntflag; /* aggregate attributes */
138 struct inode *ipbmap; /* block map inode */
139 struct inode *ipaimap; /* aggregate inode map inode */
140 struct inode *ipaimap2; /* secondary aimap inode */
141 struct inode *ipimap; /* aggregate inode map inode */
142 struct jfs_log *log; /* log */
143 struct list_head log_list; /* volumes associated with a journal */
144 short bsize; /* logical block size */
145 short l2bsize; /* log2 logical block size */
146 short nbperpage; /* blocks per page */
147 short l2nbperpage; /* log2 blocks per page */
148 short l2niperblk; /* log2 inodes per page */
149 dev_t logdev; /* external log device */
150 uint aggregate; /* volume identifier in log record */
151 pxd_t logpxd; /* pxd describing log */
152 pxd_t fsckpxd; /* pxd describing fsck wkspc */
153 pxd_t ait2; /* pxd describing AIT copy */
154 char uuid[16]; /* 128-bit uuid for volume */
155 char loguuid[16]; /* 128-bit uuid for log */
157 * commit_state is used for synchronization of the jfs_commit
158 * threads. It is protected by LAZY_LOCK().
160 int commit_state; /* commit state */
161 /* Formerly in ipimap */
162 uint gengen; /* inode generation generator*/
163 uint inostamp; /* shows inode belongs to fileset*/
165 /* Formerly in ipbmap */
166 struct bmap *bmap; /* incore bmap descriptor */
167 struct nls_table *nls_tab; /* current codepage */
168 struct inode *direct_inode; /* metadata inode */
169 uint state; /* mount/recovery state */
170 unsigned long flag; /* mount time flags */
171 uint p_state; /* state prior to going no integrity */
174 /* jfs_sb_info commit_state */
175 #define IN_LAZYCOMMIT 1
177 static inline struct jfs_inode_info *JFS_IP(struct inode *inode)
179 return list_entry(inode, struct jfs_inode_info, vfs_inode);
182 static inline int jfs_dirtable_inline(struct inode *inode)
184 return (JFS_IP(inode)->next_index <= (MAX_INLINE_DIRTABLE_ENTRY + 1));
187 static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb)
189 return sb->s_fs_info;
192 static inline int isReadOnly(struct inode *inode)
194 if (JFS_SBI(inode->i_sb)->log)
198 #endif /* _H_JFS_INCORE */