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(inode->i_sb)->log) 223 return 0; 224 return 1; 225 } 226 #endif /* _H_JFS_INCORE */ 227