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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | /* * Copyright (C) International Business Machines Corp., 2000-2004 * Portions Copyright (C) Christoph Hellwig, 2001-2002 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _H_JFS_INCORE #define _H_JFS_INCORE #include <linux/rwsem.h> #include <linux/slab.h> #include <linux/bitops.h> #include "jfs_types.h" #include "jfs_xtree.h" #include "jfs_dtree.h" /* * JFS magic number */ #define JFS_SUPER_MAGIC 0x3153464a /* "JFS1" */ /* * JFS-private inode information */ struct jfs_inode_info { int fileset; /* fileset number (always 16)*/ uint mode2; /* jfs-specific mode */ pxd_t ixpxd; /* inode extent descriptor */ dxd_t acl; /* dxd describing acl */ dxd_t ea; /* dxd describing ea */ time_t otime; /* time created */ uint next_index; /* next available directory entry index */ int acltype; /* Type of ACL */ short btorder; /* access order */ short btindex; /* btpage entry index*/ struct inode *ipimap; /* inode map */ long cflag; /* commit flags */ u16 bxflag; /* xflag of pseudo buffer? */ unchar agno; /* ag number */ signed char active_ag; /* ag currently allocating from */ lid_t blid; /* lid of pseudo buffer? */ lid_t atlhead; /* anonymous tlock list head */ lid_t atltail; /* anonymous tlock list tail */ spinlock_t ag_lock; /* protects active_ag */ struct list_head anon_inode_list; /* inodes having anonymous txns */ /* * rdwrlock serializes xtree between reads & writes and synchronizes * changes to special inodes. It's use would be redundant on * directories since the i_sem taken in the VFS is sufficient. */ struct rw_semaphore rdwrlock; /* * commit_sem serializes transaction processing on an inode. * It must be taken after beginning a transaction (txBegin), since * dirty inodes may be committed while a new transaction on the * inode is blocked in txBegin or TxBeginAnon */ struct semaphore commit_sem; /* xattr_sem allows us to access the xattrs without taking i_sem */ struct rw_semaphore xattr_sem; lid_t xtlid; /* lid of xtree lock on directory */ #ifdef CONFIG_JFS_POSIX_ACL struct posix_acl *i_acl; struct posix_acl *i_default_acl; #endif union { struct { xtpage_t _xtroot; /* 288: xtree root */ struct inomap *_imap; /* 4: inode map header */ } file; struct { struct dir_table_slot _table[12]; /* 96: dir index */ dtroot_t _dtroot; /* 288: dtree root */ } dir; struct { unchar _unused[16]; /* 16: */ dxd_t _dxd; /* 16: */ unchar _inline[128]; /* 128: inline symlink */ /* _inline_ea may overlay the last part of * file._xtroot if maxentry = XTROOTINITSLOT */ unchar _inline_ea[128]; /* 128: inline extended attr */ } link; } u; u32 dev; /* will die when we get wide dev_t */ struct inode vfs_inode; }; #define i_xtroot u.file._xtroot #define i_imap u.file._imap #define i_dirtable u.dir._table #define i_dtroot u.dir._dtroot #define i_inline u.link._inline #define i_inline_ea u.link._inline_ea #define JFS_ACL_NOT_CACHED ((void *)-1) #define IREAD_LOCK(ip) down_read(&JFS_IP(ip)->rdwrlock) #define IREAD_UNLOCK(ip) up_read(&JFS_IP(ip)->rdwrlock) #define IWRITE_LOCK(ip) down_write(&JFS_IP(ip)->rdwrlock) #define IWRITE_UNLOCK(ip) up_write(&JFS_IP(ip)->rdwrlock) /* * cflag */ enum cflags { COMMIT_Nolink, /* inode committed with zero link count */ COMMIT_Inlineea, /* commit inode inline EA */ COMMIT_Freewmap, /* free WMAP at iClose() */ COMMIT_Dirty, /* Inode is really dirty */ COMMIT_Dirtable, /* commit changes to di_dirtable */ COMMIT_Stale, /* data extent is no longer valid */ COMMIT_Synclist, /* metadata pages on group commit synclist */ }; #define set_cflag(flag, ip) set_bit(flag, &(JFS_IP(ip)->cflag)) #define clear_cflag(flag, ip) clear_bit(flag, &(JFS_IP(ip)->cflag)) #define test_cflag(flag, ip) test_bit(flag, &(JFS_IP(ip)->cflag)) #define test_and_clear_cflag(flag, ip) \ test_and_clear_bit(flag, &(JFS_IP(ip)->cflag)) /* * JFS-private superblock information. */ struct jfs_sb_info { struct super_block *sb; /* Point back to vfs super block */ unsigned long mntflag; /* aggregate attributes */ struct inode *ipbmap; /* block map inode */ struct inode *ipaimap; /* aggregate inode map inode */ struct inode *ipaimap2; /* secondary aimap inode */ struct inode *ipimap; /* aggregate inode map inode */ struct jfs_log *log; /* log */ struct list_head log_list; /* volumes associated with a journal */ short bsize; /* logical block size */ short l2bsize; /* log2 logical block size */ short nbperpage; /* blocks per page */ short l2nbperpage; /* log2 blocks per page */ short l2niperblk; /* log2 inodes per page */ dev_t logdev; /* external log device */ uint aggregate; /* volume identifier in log record */ pxd_t logpxd; /* pxd describing log */ pxd_t fsckpxd; /* pxd describing fsck wkspc */ pxd_t ait2; /* pxd describing AIT copy */ char uuid[16]; /* 128-bit uuid for volume */ char loguuid[16]; /* 128-bit uuid for log */ /* * commit_state is used for synchronization of the jfs_commit * threads. It is protected by LAZY_LOCK(). */ int commit_state; /* commit state */ /* Formerly in ipimap */ uint gengen; /* inode generation generator*/ uint inostamp; /* shows inode belongs to fileset*/ /* Formerly in ipbmap */ struct bmap *bmap; /* incore bmap descriptor */ struct nls_table *nls_tab; /* current codepage */ struct inode *direct_inode; /* metadata inode */ uint state; /* mount/recovery state */ unsigned long flag; /* mount time flags */ uint p_state; /* state prior to going no integrity */ }; /* jfs_sb_info commit_state */ #define IN_LAZYCOMMIT 1 static inline struct jfs_inode_info *JFS_IP(struct inode *inode) { return list_entry(inode, struct jfs_inode_info, vfs_inode); } static inline int jfs_dirtable_inline(struct inode *inode) { return (JFS_IP(inode)->next_index <= (MAX_INLINE_DIRTABLE_ENTRY + 1)); } static inline struct jfs_sb_info *JFS_SBI(struct super_block *sb) { return sb->s_fs_info; } static inline int isReadOnly(struct inode *inode) { if (JFS_SBI(inode->i_sb)->log) return 0; return 1; } #endif /* _H_JFS_INCORE */ |