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1da177e4 LT |
1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
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 | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
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 | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 | 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
63f83c9f | 18 | */ |
1da177e4 LT |
19 | #ifndef _H_JFS_INCORE |
20 | #define _H_JFS_INCORE | |
21 | ||
1de87444 | 22 | #include <linux/mutex.h> |
1da177e4 LT |
23 | #include <linux/rwsem.h> |
24 | #include <linux/slab.h> | |
25 | #include <linux/bitops.h> | |
2e3bc612 AS |
26 | #include <linux/uuid.h> |
27 | ||
1da177e4 LT |
28 | #include "jfs_types.h" |
29 | #include "jfs_xtree.h" | |
30 | #include "jfs_dtree.h" | |
31 | ||
32 | /* | |
33 | * JFS magic number | |
34 | */ | |
35 | #define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */ | |
36 | ||
37 | /* | |
38 | * JFS-private inode information | |
39 | */ | |
40 | struct jfs_inode_info { | |
41 | int fileset; /* fileset number (always 16)*/ | |
42 | uint mode2; /* jfs-specific mode */ | |
c18cdc1a EB |
43 | kuid_t saved_uid; /* saved for uid mount option */ |
44 | kgid_t saved_gid; /* saved for gid mount option */ | |
f720e3ba | 45 | pxd_t ixpxd; /* inode extent descriptor */ |
1da177e4 LT |
46 | dxd_t acl; /* dxd describing acl */ |
47 | dxd_t ea; /* dxd describing ea */ | |
bd646104 | 48 | time64_t otime; /* time created */ |
1da177e4 LT |
49 | uint next_index; /* next available directory entry index */ |
50 | int acltype; /* Type of ACL */ | |
51 | short btorder; /* access order */ | |
52 | short btindex; /* btpage entry index*/ | |
53 | struct inode *ipimap; /* inode map */ | |
5ba25331 | 54 | unsigned long cflag; /* commit flags */ |
ecc90462 | 55 | u64 agstart; /* agstart of the containing IAG */ |
1da177e4 | 56 | u16 bxflag; /* xflag of pseudo buffer? */ |
d31b53e3 | 57 | unchar pad; |
1da177e4 LT |
58 | signed char active_ag; /* ag currently allocating from */ |
59 | lid_t blid; /* lid of pseudo buffer? */ | |
60 | lid_t atlhead; /* anonymous tlock list head */ | |
61 | lid_t atltail; /* anonymous tlock list tail */ | |
62 | spinlock_t ag_lock; /* protects active_ag */ | |
63 | struct list_head anon_inode_list; /* inodes having anonymous txns */ | |
64 | /* | |
65 | * rdwrlock serializes xtree between reads & writes and synchronizes | |
66 | * changes to special inodes. It's use would be redundant on | |
1b1dcc1b | 67 | * directories since the i_mutex taken in the VFS is sufficient. |
1da177e4 LT |
68 | */ |
69 | struct rw_semaphore rdwrlock; | |
70 | /* | |
1de87444 | 71 | * commit_mutex serializes transaction processing on an inode. |
1da177e4 LT |
72 | * It must be taken after beginning a transaction (txBegin), since |
73 | * dirty inodes may be committed while a new transaction on the | |
74 | * inode is blocked in txBegin or TxBeginAnon | |
75 | */ | |
1de87444 | 76 | struct mutex commit_mutex; |
1b1dcc1b | 77 | /* xattr_sem allows us to access the xattrs without taking i_mutex */ |
1da177e4 LT |
78 | struct rw_semaphore xattr_sem; |
79 | lid_t xtlid; /* lid of xtree lock on directory */ | |
1da177e4 LT |
80 | union { |
81 | struct { | |
82 | xtpage_t _xtroot; /* 288: xtree root */ | |
83 | struct inomap *_imap; /* 4: inode map header */ | |
84 | } file; | |
85 | struct { | |
86 | struct dir_table_slot _table[12]; /* 96: dir index */ | |
87 | dtroot_t _dtroot; /* 288: dtree root */ | |
88 | } dir; | |
89 | struct { | |
90 | unchar _unused[16]; /* 16: */ | |
91 | dxd_t _dxd; /* 16: */ | |
961b33c2 | 92 | /* _inline may overflow into _inline_ea when needed */ |
1da177e4 LT |
93 | unchar _inline[128]; /* 128: inline symlink */ |
94 | /* _inline_ea may overlay the last part of | |
95 | * file._xtroot if maxentry = XTROOTINITSLOT | |
96 | */ | |
97 | unchar _inline_ea[128]; /* 128: inline extended attr */ | |
98 | } link; | |
99 | } u; | |
507e1fa6 JK |
100 | #ifdef CONFIG_QUOTA |
101 | struct dquot *i_dquot[MAXQUOTAS]; | |
102 | #endif | |
1da177e4 LT |
103 | u32 dev; /* will die when we get wide dev_t */ |
104 | struct inode vfs_inode; | |
105 | }; | |
106 | #define i_xtroot u.file._xtroot | |
107 | #define i_imap u.file._imap | |
108 | #define i_dirtable u.dir._table | |
109 | #define i_dtroot u.dir._dtroot | |
110 | #define i_inline u.link._inline | |
111 | #define i_inline_ea u.link._inline_ea | |
112 | ||
82d5b9a7 DK |
113 | #define IREAD_LOCK(ip, subclass) \ |
114 | down_read_nested(&JFS_IP(ip)->rdwrlock, subclass) | |
1da177e4 | 115 | #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock) |
82d5b9a7 DK |
116 | #define IWRITE_LOCK(ip, subclass) \ |
117 | down_write_nested(&JFS_IP(ip)->rdwrlock, subclass) | |
1da177e4 LT |
118 | #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock) |
119 | ||
120 | /* | |
121 | * cflag | |
122 | */ | |
123 | enum cflags { | |
124 | COMMIT_Nolink, /* inode committed with zero link count */ | |
125 | COMMIT_Inlineea, /* commit inode inline EA */ | |
126 | COMMIT_Freewmap, /* free WMAP at iClose() */ | |
127 | COMMIT_Dirty, /* Inode is really dirty */ | |
128 | COMMIT_Dirtable, /* commit changes to di_dirtable */ | |
129 | COMMIT_Stale, /* data extent is no longer valid */ | |
130 | COMMIT_Synclist, /* metadata pages on group commit synclist */ | |
131 | }; | |
132 | ||
82d5b9a7 DK |
133 | /* |
134 | * commit_mutex nesting subclasses: | |
135 | */ | |
136 | enum commit_mutex_class | |
137 | { | |
138 | COMMIT_MUTEX_PARENT, | |
139 | COMMIT_MUTEX_CHILD, | |
140 | COMMIT_MUTEX_SECOND_PARENT, /* Renaming */ | |
141 | COMMIT_MUTEX_VICTIM /* Inode being unlinked due to rename */ | |
142 | }; | |
143 | ||
144 | /* | |
145 | * rdwrlock subclasses: | |
146 | * The dmap inode may be locked while a normal inode or the imap inode are | |
147 | * locked. | |
148 | */ | |
149 | enum rdwrlock_class | |
150 | { | |
151 | RDWRLOCK_NORMAL, | |
152 | RDWRLOCK_IMAP, | |
153 | RDWRLOCK_DMAP | |
154 | }; | |
155 | ||
1da177e4 LT |
156 | #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag)) |
157 | #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag)) | |
158 | #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag)) | |
159 | #define test_and_clear_cflag(flag, ip) \ | |
160 | test_and_clear_bit(flag, &(JFS_IP(ip)->cflag)) | |
161 | /* | |
162 | * JFS-private superblock information. | |
163 | */ | |
164 | struct jfs_sb_info { | |
165 | struct super_block *sb; /* Point back to vfs super block */ | |
166 | unsigned long mntflag; /* aggregate attributes */ | |
167 | struct inode *ipbmap; /* block map inode */ | |
168 | struct inode *ipaimap; /* aggregate inode map inode */ | |
169 | struct inode *ipaimap2; /* secondary aimap inode */ | |
170 | struct inode *ipimap; /* aggregate inode map inode */ | |
171 | struct jfs_log *log; /* log */ | |
172 | struct list_head log_list; /* volumes associated with a journal */ | |
173 | short bsize; /* logical block size */ | |
174 | short l2bsize; /* log2 logical block size */ | |
175 | short nbperpage; /* blocks per page */ | |
176 | short l2nbperpage; /* log2 blocks per page */ | |
177 | short l2niperblk; /* log2 inodes per page */ | |
178 | dev_t logdev; /* external log device */ | |
179 | uint aggregate; /* volume identifier in log record */ | |
180 | pxd_t logpxd; /* pxd describing log */ | |
181 | pxd_t fsckpxd; /* pxd describing fsck wkspc */ | |
182 | pxd_t ait2; /* pxd describing AIT copy */ | |
2e3bc612 AS |
183 | uuid_t uuid; /* 128-bit uuid for volume */ |
184 | uuid_t loguuid; /* 128-bit uuid for log */ | |
1da177e4 LT |
185 | /* |
186 | * commit_state is used for synchronization of the jfs_commit | |
187 | * threads. It is protected by LAZY_LOCK(). | |
188 | */ | |
189 | int commit_state; /* commit state */ | |
190 | /* Formerly in ipimap */ | |
191 | uint gengen; /* inode generation generator*/ | |
192 | uint inostamp; /* shows inode belongs to fileset*/ | |
193 | ||
f720e3ba | 194 | /* Formerly in ipbmap */ |
1da177e4 LT |
195 | struct bmap *bmap; /* incore bmap descriptor */ |
196 | struct nls_table *nls_tab; /* current codepage */ | |
7fab479b | 197 | struct inode *direct_inode; /* metadata inode */ |
1da177e4 LT |
198 | uint state; /* mount/recovery state */ |
199 | unsigned long flag; /* mount time flags */ | |
200 | uint p_state; /* state prior to going no integrity */ | |
c18cdc1a EB |
201 | kuid_t uid; /* uid to override on-disk uid */ |
202 | kgid_t gid; /* gid to override on-disk gid */ | |
69eb66d7 | 203 | uint umask; /* umask to override on-disk umask */ |
b40c2e66 | 204 | uint minblks_trim; /* minimum blocks, for online trim */ |
1da177e4 LT |
205 | }; |
206 | ||
207 | /* jfs_sb_info commit_state */ | |
208 | #define IN_LAZYCOMMIT 1 | |
209 | ||
210 | static inline struct jfs_inode_info *JFS_IP(struct inode *inode) | |
211 | { | |
db6172c4 | 212 | return container_of(inode, struct jfs_inode_info, vfs_inode); |
1da177e4 LT |
213 | } |
214 | ||
215 | static inline int jfs_dirtable_inline(struct inode *inode) | |
216 | { | |
217 | return (JFS_IP(inode)->next_index <= (MAX_INLINE_DIRTABLE_ENTRY + 1)); | |
218 | } | |
219 | ||
220 | static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb) | |
221 | { | |
222 | return sb->s_fs_info; | |
223 | } | |
224 | ||
225 | static inline int isReadOnly(struct inode *inode) | |
226 | { | |
227 | if (JFS_SBI(inode->i_sb)->log) | |
228 | return 0; | |
229 | return 1; | |
230 | } | |
231 | #endif /* _H_JFS_INCORE */ |