1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2004 |
4 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
5 | */ |
6 | #ifndef _H_JFS_INCORE |
7 | #define _H_JFS_INCORE |
8 | |
9 | #include <linux/mutex.h> |
10 | #include <linux/rwsem.h> |
11 | #include <linux/slab.h> |
12 | #include <linux/bitops.h> |
13 | #include <linux/uuid.h> |
14 | |
15 | #include "jfs_types.h" |
16 | #include "jfs_xtree.h" |
17 | #include "jfs_dtree.h" |
18 | |
19 | /* |
20 | * JFS magic number |
21 | */ |
22 | #define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */ |
23 | |
24 | /* |
25 | * JFS-private inode information |
26 | */ |
27 | struct jfs_inode_info { |
28 | int fileset; /* fileset number (always 16)*/ |
29 | uint mode2; /* jfs-specific mode */ |
30 | kuid_t saved_uid; /* saved for uid mount option */ |
31 | kgid_t saved_gid; /* saved for gid mount option */ |
32 | pxd_t ixpxd; /* inode extent descriptor */ |
33 | dxd_t acl; /* dxd describing acl */ |
34 | dxd_t ea; /* dxd describing ea */ |
35 | time64_t otime; /* time created */ |
36 | uint next_index; /* next available directory entry index */ |
37 | int acltype; /* Type of ACL */ |
38 | short btorder; /* access order */ |
39 | short btindex; /* btpage entry index*/ |
40 | struct inode *ipimap; /* inode map */ |
41 | unsigned long cflag; /* commit flags */ |
42 | u64 agstart; /* agstart of the containing IAG */ |
43 | u16 bxflag; /* xflag of pseudo buffer? */ |
44 | unchar pad; |
45 | signed char active_ag; /* ag currently allocating from */ |
46 | lid_t blid; /* lid of pseudo buffer? */ |
47 | lid_t atlhead; /* anonymous tlock list head */ |
48 | lid_t atltail; /* anonymous tlock list tail */ |
49 | spinlock_t ag_lock; /* protects active_ag */ |
50 | struct list_head anon_inode_list; /* inodes having anonymous txns */ |
51 | /* |
52 | * rdwrlock serializes xtree between reads & writes and synchronizes |
53 | * changes to special inodes. It's use would be redundant on |
54 | * directories since the i_mutex taken in the VFS is sufficient. |
55 | */ |
56 | struct rw_semaphore rdwrlock; |
57 | /* |
58 | * commit_mutex serializes transaction processing on an inode. |
59 | * It must be taken after beginning a transaction (txBegin), since |
60 | * dirty inodes may be committed while a new transaction on the |
61 | * inode is blocked in txBegin or TxBeginAnon |
62 | */ |
63 | struct mutex commit_mutex; |
64 | /* xattr_sem allows us to access the xattrs without taking i_mutex */ |
65 | struct rw_semaphore xattr_sem; |
66 | lid_t xtlid; /* lid of xtree lock on directory */ |
67 | union { |
68 | struct { |
69 | xtroot_t _xtroot; /* 288: xtree root */ |
70 | struct inomap *_imap; /* 4: inode map header */ |
71 | } file; |
72 | struct { |
73 | struct dir_table_slot _table[12]; /* 96: dir index */ |
74 | dtroot_t _dtroot; /* 288: dtree root */ |
75 | } dir; |
76 | struct { |
77 | unchar _unused[16]; /* 16: */ |
78 | dxd_t _dxd; /* 16: */ |
79 | /* _inline may overflow into _inline_ea when needed */ |
80 | /* _inline_ea may overlay the last part of |
81 | * file._xtroot if maxentry = XTROOTINITSLOT |
82 | */ |
83 | union { |
84 | struct { |
85 | /* 128: inline symlink */ |
86 | unchar _inline[128]; |
87 | /* 128: inline extended attr */ |
88 | unchar _inline_ea[128]; |
89 | }; |
90 | unchar _inline_all[256]; |
91 | }; |
92 | } link; |
93 | } u; |
94 | #ifdef CONFIG_QUOTA |
95 | struct dquot *i_dquot[MAXQUOTAS]; |
96 | #endif |
97 | u32 dev; /* will die when we get wide dev_t */ |
98 | struct inode vfs_inode; |
99 | }; |
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 |
106 | #define i_inline_all u.link._inline_all |
107 | |
108 | #define IREAD_LOCK(ip, subclass) \ |
109 | down_read_nested(&JFS_IP(ip)->rdwrlock, subclass) |
110 | #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock) |
111 | #define IWRITE_LOCK(ip, subclass) \ |
112 | down_write_nested(&JFS_IP(ip)->rdwrlock, subclass) |
113 | #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock) |
114 | |
115 | /* |
116 | * cflag |
117 | */ |
118 | enum cflags { |
119 | COMMIT_Nolink, /* inode committed with zero link count */ |
120 | COMMIT_Inlineea, /* commit inode inline EA */ |
121 | COMMIT_Freewmap, /* free WMAP at iClose() */ |
122 | COMMIT_Dirty, /* Inode is really dirty */ |
123 | COMMIT_Dirtable, /* commit changes to di_dirtable */ |
124 | COMMIT_Stale, /* data extent is no longer valid */ |
125 | COMMIT_Synclist, /* metadata pages on group commit synclist */ |
126 | }; |
127 | |
128 | /* |
129 | * commit_mutex nesting subclasses: |
130 | */ |
131 | enum commit_mutex_class |
132 | { |
133 | COMMIT_MUTEX_PARENT, |
134 | COMMIT_MUTEX_CHILD, |
135 | COMMIT_MUTEX_SECOND_PARENT, /* Renaming */ |
136 | COMMIT_MUTEX_VICTIM /* Inode being unlinked due to rename */ |
137 | }; |
138 | |
139 | /* |
140 | * rdwrlock subclasses: |
141 | * The dmap inode may be locked while a normal inode or the imap inode are |
142 | * locked. |
143 | */ |
144 | enum rdwrlock_class |
145 | { |
146 | RDWRLOCK_NORMAL, |
147 | RDWRLOCK_IMAP, |
148 | RDWRLOCK_DMAP |
149 | }; |
150 | |
151 | #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag)) |
152 | #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag)) |
153 | #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag)) |
154 | #define test_and_clear_cflag(flag, ip) \ |
155 | test_and_clear_bit(flag, &(JFS_IP(ip)->cflag)) |
156 | /* |
157 | * JFS-private superblock information. |
158 | */ |
159 | struct jfs_sb_info { |
160 | struct super_block *sb; /* Point back to vfs super block */ |
161 | unsigned long mntflag; /* aggregate attributes */ |
162 | struct inode *ipbmap; /* block map inode */ |
163 | struct inode *ipaimap; /* aggregate inode map inode */ |
164 | struct inode *ipaimap2; /* secondary aimap inode */ |
165 | struct inode *ipimap; /* aggregate inode map inode */ |
166 | struct jfs_log *log; /* log */ |
167 | struct list_head log_list; /* volumes associated with a journal */ |
168 | short bsize; /* logical block size */ |
169 | short l2bsize; /* log2 logical block size */ |
170 | short nbperpage; /* blocks per page */ |
171 | short l2nbperpage; /* log2 blocks per page */ |
172 | short l2niperblk; /* log2 inodes per page */ |
173 | dev_t logdev; /* external log device */ |
174 | uint aggregate; /* volume identifier in log record */ |
175 | pxd_t logpxd; /* pxd describing log */ |
176 | pxd_t fsckpxd; /* pxd describing fsck wkspc */ |
177 | pxd_t ait2; /* pxd describing AIT copy */ |
178 | uuid_t uuid; /* 128-bit uuid for volume */ |
179 | uuid_t loguuid; /* 128-bit uuid for log */ |
180 | /* |
181 | * commit_state is used for synchronization of the jfs_commit |
182 | * threads. It is protected by LAZY_LOCK(). |
183 | */ |
184 | int commit_state; /* commit state */ |
185 | /* Formerly in ipimap */ |
186 | uint gengen; /* inode generation generator*/ |
187 | uint inostamp; /* shows inode belongs to fileset*/ |
188 | |
189 | /* Formerly in ipbmap */ |
190 | struct bmap *bmap; /* incore bmap descriptor */ |
191 | struct nls_table *nls_tab; /* current codepage */ |
192 | struct inode *direct_inode; /* metadata inode */ |
193 | uint state; /* mount/recovery state */ |
194 | unsigned long flag; /* mount time flags */ |
195 | uint p_state; /* state prior to going no integrity */ |
196 | kuid_t uid; /* uid to override on-disk uid */ |
197 | kgid_t gid; /* gid to override on-disk gid */ |
198 | uint umask; /* umask to override on-disk umask */ |
199 | uint minblks_trim; /* minimum blocks, for online trim */ |
200 | }; |
201 | |
202 | /* jfs_sb_info commit_state */ |
203 | #define IN_LAZYCOMMIT 1 |
204 | |
205 | static inline struct jfs_inode_info *JFS_IP(struct inode *inode) |
206 | { |
207 | return container_of(inode, struct jfs_inode_info, vfs_inode); |
208 | } |
209 | |
210 | static inline int jfs_dirtable_inline(struct inode *inode) |
211 | { |
212 | return (JFS_IP(inode)->next_index <= (MAX_INLINE_DIRTABLE_ENTRY + 1)); |
213 | } |
214 | |
215 | static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb) |
216 | { |
217 | return sb->s_fs_info; |
218 | } |
219 | |
220 | static inline int isReadOnly(struct inode *inode) |
221 | { |
222 | if (JFS_SBI(sb: inode->i_sb)->log) |
223 | return 0; |
224 | return 1; |
225 | } |
226 | #endif /* _H_JFS_INCORE */ |
227 | |