jfs_txnmgr.h (7737B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * Copyright (C) International Business Machines Corp., 2000-2004 4 */ 5#ifndef _H_JFS_TXNMGR 6#define _H_JFS_TXNMGR 7 8#include "jfs_logmgr.h" 9 10/* 11 * Hide implementation of TxBlock and TxLock 12 */ 13#define tid_to_tblock(tid) (&TxBlock[tid]) 14 15#define lid_to_tlock(lid) (&TxLock[lid]) 16 17/* 18 * transaction block 19 */ 20struct tblock { 21 /* 22 * tblock and jbuf_t common area: struct logsyncblk 23 * 24 * the following 5 fields are the same as struct logsyncblk 25 * which is common to tblock and jbuf to form logsynclist 26 */ 27 u16 xflag; /* tx commit type */ 28 u16 flag; /* tx commit state */ 29 lid_t dummy; /* Must keep structures common */ 30 s32 lsn; /* recovery lsn */ 31 struct list_head synclist; /* logsynclist link */ 32 33 /* lock management */ 34 struct super_block *sb; /* super block */ 35 lid_t next; /* index of first tlock of tid */ 36 lid_t last; /* index of last tlock of tid */ 37 wait_queue_head_t waitor; /* tids waiting on this tid */ 38 39 /* log management */ 40 u32 logtid; /* log transaction id */ 41 42 /* commit management */ 43 struct list_head cqueue; /* commit queue list */ 44 s32 clsn; /* commit lsn */ 45 struct lbuf *bp; 46 s32 pn; /* commit record log page number */ 47 s32 eor; /* commit record eor */ 48 wait_queue_head_t gcwait; /* group commit event list: 49 * ready transactions wait on this 50 * event for group commit completion. 51 */ 52 union { 53 struct inode *ip; /* inode being deleted */ 54 pxd_t ixpxd; /* pxd of inode extent for created inode */ 55 } u; 56 u32 ino; /* inode number being created */ 57}; 58 59extern struct tblock *TxBlock; /* transaction block table */ 60 61/* commit flags: tblk->xflag */ 62#define COMMIT_SYNC 0x0001 /* synchronous commit */ 63#define COMMIT_FORCE 0x0002 /* force pageout at end of commit */ 64#define COMMIT_FLUSH 0x0004 /* init flush at end of commit */ 65#define COMMIT_MAP 0x00f0 66#define COMMIT_PMAP 0x0010 /* update pmap */ 67#define COMMIT_WMAP 0x0020 /* update wmap */ 68#define COMMIT_PWMAP 0x0040 /* update pwmap */ 69#define COMMIT_FREE 0x0f00 70#define COMMIT_DELETE 0x0100 /* inode delete */ 71#define COMMIT_TRUNCATE 0x0200 /* file truncation */ 72#define COMMIT_CREATE 0x0400 /* inode create */ 73#define COMMIT_LAZY 0x0800 /* lazy commit */ 74#define COMMIT_PAGE 0x1000 /* Identifies element as metapage */ 75#define COMMIT_INODE 0x2000 /* Identifies element as inode */ 76 77/* group commit flags tblk->flag: see jfs_logmgr.h */ 78 79/* 80 * transaction lock 81 */ 82struct tlock { 83 lid_t next; /* 2: index next lockword on tid locklist 84 * next lockword on freelist 85 */ 86 tid_t tid; /* 2: transaction id holding lock */ 87 88 u16 flag; /* 2: lock control */ 89 u16 type; /* 2: log type */ 90 91 struct metapage *mp; /* 4/8: object page buffer locked */ 92 struct inode *ip; /* 4/8: object */ 93 /* (16) */ 94 95 s16 lock[24]; /* 48: overlay area */ 96}; /* (64) */ 97 98extern struct tlock *TxLock; /* transaction lock table */ 99 100/* 101 * tlock flag 102 */ 103/* txLock state */ 104#define tlckPAGELOCK 0x8000 105#define tlckINODELOCK 0x4000 106#define tlckLINELOCK 0x2000 107#define tlckINLINELOCK 0x1000 108/* lmLog state */ 109#define tlckLOG 0x0800 110/* updateMap state */ 111#define tlckUPDATEMAP 0x0080 112#define tlckDIRECTORY 0x0040 113/* freeLock state */ 114#define tlckFREELOCK 0x0008 115#define tlckWRITEPAGE 0x0004 116#define tlckFREEPAGE 0x0002 117 118/* 119 * tlock type 120 */ 121#define tlckTYPE 0xfe00 122#define tlckINODE 0x8000 123#define tlckXTREE 0x4000 124#define tlckDTREE 0x2000 125#define tlckMAP 0x1000 126#define tlckEA 0x0800 127#define tlckACL 0x0400 128#define tlckDATA 0x0200 129#define tlckBTROOT 0x0100 130 131#define tlckOPERATION 0x00ff 132#define tlckGROW 0x0001 /* file grow */ 133#define tlckREMOVE 0x0002 /* file delete */ 134#define tlckTRUNCATE 0x0004 /* file truncate */ 135#define tlckRELOCATE 0x0008 /* file/directory relocate */ 136#define tlckENTRY 0x0001 /* directory insert/delete */ 137#define tlckEXTEND 0x0002 /* directory extend in-line */ 138#define tlckSPLIT 0x0010 /* splited page */ 139#define tlckNEW 0x0020 /* new page from split */ 140#define tlckFREE 0x0040 /* free page */ 141#define tlckRELINK 0x0080 /* update sibling pointer */ 142 143/* 144 * linelock for lmLog() 145 * 146 * note: linelock and its variations are overlaid 147 * at tlock.lock: watch for alignment; 148 */ 149struct lv { 150 u8 offset; /* 1: */ 151 u8 length; /* 1: */ 152}; /* (2) */ 153 154#define TLOCKSHORT 20 155#define TLOCKLONG 28 156 157struct linelock { 158 lid_t next; /* 2: next linelock */ 159 160 s8 maxcnt; /* 1: */ 161 s8 index; /* 1: */ 162 163 u16 flag; /* 2: */ 164 u8 type; /* 1: */ 165 u8 l2linesize; /* 1: log2 of linesize */ 166 /* (8) */ 167 168 struct lv lv[20]; /* 40: */ 169}; /* (48) */ 170 171#define dt_lock linelock 172 173struct xtlock { 174 lid_t next; /* 2: */ 175 176 s8 maxcnt; /* 1: */ 177 s8 index; /* 1: */ 178 179 u16 flag; /* 2: */ 180 u8 type; /* 1: */ 181 u8 l2linesize; /* 1: log2 of linesize */ 182 /* (8) */ 183 184 struct lv header; /* 2: */ 185 struct lv lwm; /* 2: low water mark */ 186 struct lv hwm; /* 2: high water mark */ 187 struct lv twm; /* 2: */ 188 /* (16) */ 189 190 s32 pxdlock[8]; /* 32: */ 191}; /* (48) */ 192 193 194/* 195 * maplock for txUpdateMap() 196 * 197 * note: maplock and its variations are overlaid 198 * at tlock.lock/linelock: watch for alignment; 199 * N.B. next field may be set by linelock, and should not 200 * be modified by maplock; 201 * N.B. index of the first pxdlock specifies index of next 202 * free maplock (i.e., number of maplock) in the tlock; 203 */ 204struct maplock { 205 lid_t next; /* 2: */ 206 207 u8 maxcnt; /* 2: */ 208 u8 index; /* 2: next free maplock index */ 209 210 u16 flag; /* 2: */ 211 u8 type; /* 1: */ 212 u8 count; /* 1: number of pxd/xad */ 213 /* (8) */ 214 215 pxd_t pxd; /* 8: */ 216}; /* (16): */ 217 218/* maplock flag */ 219#define mlckALLOC 0x00f0 220#define mlckALLOCXADLIST 0x0080 221#define mlckALLOCPXDLIST 0x0040 222#define mlckALLOCXAD 0x0020 223#define mlckALLOCPXD 0x0010 224#define mlckFREE 0x000f 225#define mlckFREEXADLIST 0x0008 226#define mlckFREEPXDLIST 0x0004 227#define mlckFREEXAD 0x0002 228#define mlckFREEPXD 0x0001 229 230#define pxd_lock maplock 231 232struct xdlistlock { 233 lid_t next; /* 2: */ 234 235 u8 maxcnt; /* 2: */ 236 u8 index; /* 2: */ 237 238 u16 flag; /* 2: */ 239 u8 type; /* 1: */ 240 u8 count; /* 1: number of pxd/xad */ 241 /* (8) */ 242 243 /* 244 * We need xdlist to be 64 bits (8 bytes), regardless of 245 * whether void * is 32 or 64 bits 246 */ 247 union { 248 void *_xdlist; /* pxd/xad list */ 249 s64 pad; /* 8: Force 64-bit xdlist size */ 250 } union64; 251}; /* (16): */ 252 253#define xdlist union64._xdlist 254 255/* 256 * commit 257 * 258 * parameter to the commit manager routines 259 */ 260struct commit { 261 tid_t tid; /* tid = index of tblock */ 262 int flag; /* flags */ 263 struct jfs_log *log; /* log */ 264 struct super_block *sb; /* superblock */ 265 266 int nip; /* number of entries in iplist */ 267 struct inode **iplist; /* list of pointers to inodes */ 268 269 /* log record descriptor on 64-bit boundary */ 270 struct lrd lrd; /* : log record descriptor */ 271}; 272 273/* 274 * external declarations 275 */ 276extern int jfs_tlocks_low; 277 278extern int txInit(void); 279extern void txExit(void); 280extern struct tlock *txLock(tid_t, struct inode *, struct metapage *, int); 281extern struct tlock *txMaplock(tid_t, struct inode *, int); 282extern int txCommit(tid_t, int, struct inode **, int); 283extern tid_t txBegin(struct super_block *, int); 284extern void txBeginAnon(struct super_block *); 285extern void txEnd(tid_t); 286extern void txAbort(tid_t, int); 287extern struct linelock *txLinelock(struct linelock *); 288extern void txFreeMap(struct inode *, struct maplock *, struct tblock *, int); 289extern void txEA(tid_t, struct inode *, dxd_t *, dxd_t *); 290extern void txFreelock(struct inode *); 291extern int lmLog(struct jfs_log *, struct tblock *, struct lrd *, 292 struct tlock *); 293extern void txQuiesce(struct super_block *); 294extern void txResume(struct super_block *); 295extern void txLazyUnlock(struct tblock *); 296extern int jfs_lazycommit(void *); 297extern int jfs_sync(void *); 298#endif /* _H_JFS_TXNMGR */