1 /* 2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_LOG_PRIV_H__ 19 #define __XFS_LOG_PRIV_H__ 20 21 struct xfs_buf; 22 struct ktrace; 23 struct log; 24 struct xlog_ticket; 25 struct xfs_buf_cancel; 26 struct xfs_mount; 27 28 /* 29 * Macros, structures, prototypes for internal log manager use. 30 */ 31 32 #define XLOG_MIN_ICLOGS 2 33 #define XLOG_MED_ICLOGS 4 34 #define XLOG_MAX_ICLOGS 8 35 #define XLOG_CALLBACK_SIZE 10 36 #define XLOG_HEADER_MAGIC_NUM 0xFEEDbabe /* Invalid cycle number */ 37 #define XLOG_VERSION_1 1 38 #define XLOG_VERSION_2 2 /* Large IClogs, Log sunit */ 39 #define XLOG_VERSION_OKBITS (XLOG_VERSION_1 | XLOG_VERSION_2) 40 #define XLOG_RECORD_BSIZE (16*1024) /* eventually 32k */ 41 #define XLOG_BIG_RECORD_BSIZE (32*1024) /* 32k buffers */ 42 #define XLOG_MAX_RECORD_BSIZE (256*1024) 43 #define XLOG_HEADER_CYCLE_SIZE (32*1024) /* cycle data in header */ 44 #define XLOG_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */ 45 #define XLOG_BIG_RECORD_BSHIFT 15 /* 32k == 1 << 15 */ 46 #define XLOG_MAX_RECORD_BSHIFT 18 /* 256k == 1 << 18 */ 47 #define XLOG_BTOLSUNIT(log, b) (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \ 48 (log)->l_mp->m_sb.sb_logsunit) 49 #define XLOG_LSUNITTOB(log, su) ((su) * (log)->l_mp->m_sb.sb_logsunit) 50 51 #define XLOG_HEADER_SIZE 512 52 53 #define XLOG_REC_SHIFT(log) \ 54 BTOBB(1 << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \ 55 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) 56 #define XLOG_TOTAL_REC_SHIFT(log) \ 57 BTOBB(XLOG_MAX_ICLOGS << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \ 58 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) 59 60 /* 61 * set lsns 62 */ 63 64 #define ASSIGN_ANY_LSN_HOST(lsn,cycle,block) \ 65 { \ 66 (lsn) = ((xfs_lsn_t)(cycle)<<32)|(block); \ 67 } 68 #define ASSIGN_ANY_LSN_DISK(lsn,cycle,block) \ 69 { \ 70 INT_SET(((uint *)&(lsn))[0], ARCH_CONVERT, (cycle)); \ 71 INT_SET(((uint *)&(lsn))[1], ARCH_CONVERT, (block)); \ 72 } 73 #define ASSIGN_LSN(lsn,log) \ 74 ASSIGN_ANY_LSN_DISK(lsn,(log)->l_curr_cycle,(log)->l_curr_block); 75 76 #define XLOG_SET(f,b) (((f) & (b)) == (b)) 77 78 #define GET_CYCLE(ptr, arch) \ 79 (INT_GET(*(uint *)(ptr), arch) == XLOG_HEADER_MAGIC_NUM ? \ 80 INT_GET(*((uint *)(ptr)+1), arch) : \ 81 INT_GET(*(uint *)(ptr), arch) \ 82 ) 83 84 #define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1) 85 86 87 #ifdef __KERNEL__ 88 89 /* 90 * get client id from packed copy. 91 * 92 * this hack is here because the xlog_pack code copies four bytes 93 * of xlog_op_header containing the fields oh_clientid, oh_flags 94 * and oh_res2 into the packed copy. 95 * 96 * later on this four byte chunk is treated as an int and the 97 * client id is pulled out. 98 * 99 * this has endian issues, of course. 100 */ 101 102 #ifndef XFS_NATIVE_HOST 103 #define GET_CLIENT_ID(i,arch) \ 104 ((i) & 0xff) 105 #else 106 #define GET_CLIENT_ID(i,arch) \ 107 ((i) >> 24) 108 #endif 109 110 #define GRANT_LOCK(log) mutex_spinlock(&(log)->l_grant_lock) 111 #define GRANT_UNLOCK(log, s) mutex_spinunlock(&(log)->l_grant_lock, s) 112 #define LOG_LOCK(log) mutex_spinlock(&(log)->l_icloglock) 113 #define LOG_UNLOCK(log, s) mutex_spinunlock(&(log)->l_icloglock, s) 114 115 #define xlog_panic(args...) cmn_err(CE_PANIC, ## args) 116 #define xlog_exit(args...) cmn_err(CE_PANIC, ## args) 117 #define xlog_warn(args...) cmn_err(CE_WARN, ## args) 118 119 /* 120 * In core log state 121 */ 122 #define XLOG_STATE_ACTIVE 0x0001 /* Current IC log being written to */ 123 #define XLOG_STATE_WANT_SYNC 0x0002 /* Want to sync this iclog; no more writes */ 124 #define XLOG_STATE_SYNCING 0x0004 /* This IC log is syncing */ 125 #define XLOG_STATE_DONE_SYNC 0x0008 /* Done syncing to disk */ 126 #define XLOG_STATE_DO_CALLBACK \ 127 0x0010 /* Process callback functions */ 128 #define XLOG_STATE_CALLBACK 0x0020 /* Callback functions now */ 129 #define XLOG_STATE_DIRTY 0x0040 /* Dirty IC log, not ready for ACTIVE status*/ 130 #define XLOG_STATE_IOERROR 0x0080 /* IO error happened in sync'ing log */ 131 #define XLOG_STATE_ALL 0x7FFF /* All possible valid flags */ 132 #define XLOG_STATE_NOTUSED 0x8000 /* This IC log not being used */ 133 #endif /* __KERNEL__ */ 134 135 /* 136 * Flags to log operation header 137 * 138 * The first write of a new transaction will be preceded with a start 139 * record, XLOG_START_TRANS. Once a transaction is committed, a commit 140 * record is written, XLOG_COMMIT_TRANS. If a single region can not fit into 141 * the remainder of the current active in-core log, it is split up into 142 * multiple regions. Each partial region will be marked with a 143 * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS. 144 * 145 */ 146 #define XLOG_START_TRANS 0x01 /* Start a new transaction */ 147 #define XLOG_COMMIT_TRANS 0x02 /* Commit this transaction */ 148 #define XLOG_CONTINUE_TRANS 0x04 /* Cont this trans into new region */ 149 #define XLOG_WAS_CONT_TRANS 0x08 /* Cont this trans into new region */ 150 #define XLOG_END_TRANS 0x10 /* End a continued transaction */ 151 #define XLOG_UNMOUNT_TRANS 0x20 /* Unmount a filesystem transaction */ 152 #define XLOG_SKIP_TRANS (XLOG_COMMIT_TRANS | XLOG_CONTINUE_TRANS | \ 153 XLOG_WAS_CONT_TRANS | XLOG_END_TRANS | \ 154 XLOG_UNMOUNT_TRANS) 155 156 #ifdef __KERNEL__ 157 /* 158 * Flags to log ticket 159 */ 160 #define XLOG_TIC_INITED 0x1 /* has been initialized */ 161 #define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */ 162 #define XLOG_TIC_IN_Q 0x4 163 #endif /* __KERNEL__ */ 164 165 #define XLOG_UNMOUNT_TYPE 0x556e /* Un for Unmount */ 166 167 /* 168 * Flags for log structure 169 */ 170 #define XLOG_CHKSUM_MISMATCH 0x1 /* used only during recovery */ 171 #define XLOG_ACTIVE_RECOVERY 0x2 /* in the middle of recovery */ 172 #define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */ 173 #define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being 174 shutdown */ 175 typedef __uint32_t xlog_tid_t; 176 177 178 #ifdef __KERNEL__ 179 /* 180 * Below are states for covering allocation transactions. 181 * By covering, we mean changing the h_tail_lsn in the last on-disk 182 * log write such that no allocation transactions will be re-done during 183 * recovery after a system crash. Recovery starts at the last on-disk 184 * log write. 185 * 186 * These states are used to insert dummy log entries to cover 187 * space allocation transactions which can undo non-transactional changes 188 * after a crash. Writes to a file with space 189 * already allocated do not result in any transactions. Allocations 190 * might include space beyond the EOF. So if we just push the EOF a 191 * little, the last transaction for the file could contain the wrong 192 * size. If there is no file system activity, after an allocation 193 * transaction, and the system crashes, the allocation transaction 194 * will get replayed and the file will be truncated. This could 195 * be hours/days/... after the allocation occurred. 196 * 197 * The fix for this is to do two dummy transactions when the 198 * system is idle. We need two dummy transaction because the h_tail_lsn 199 * in the log record header needs to point beyond the last possible 200 * non-dummy transaction. The first dummy changes the h_tail_lsn to 201 * the first transaction before the dummy. The second dummy causes 202 * h_tail_lsn to point to the first dummy. Recovery starts at h_tail_lsn. 203 * 204 * These dummy transactions get committed when everything 205 * is idle (after there has been some activity). 206 * 207 * There are 5 states used to control this. 208 * 209 * IDLE -- no logging has been done on the file system or 210 * we are done covering previous transactions. 211 * NEED -- logging has occurred and we need a dummy transaction 212 * when the log becomes idle. 213 * DONE -- we were in the NEED state and have committed a dummy 214 * transaction. 215 * NEED2 -- we detected that a dummy transaction has gone to the 216 * on disk log with no other transactions. 217 * DONE2 -- we committed a dummy transaction when in the NEED2 state. 218 * 219 * There are two places where we switch states: 220 * 221 * 1.) In xfs_sync, when we detect an idle log and are in NEED or NEED2. 222 * We commit the dummy transaction and switch to DONE or DONE2, 223 * respectively. In all other states, we don't do anything. 224 * 225 * 2.) When we finish writing the on-disk log (xlog_state_clean_log). 226 * 227 * No matter what state we are in, if this isn't the dummy 228 * transaction going out, the next state is NEED. 229 * So, if we aren't in the DONE or DONE2 states, the next state 230 * is NEED. We can't be finishing a write of the dummy record 231 * unless it was committed and the state switched to DONE or DONE2. 232 * 233 * If we are in the DONE state and this was a write of the 234 * dummy transaction, we move to NEED2. 235 * 236 * If we are in the DONE2 state and this was a write of the 237 * dummy transaction, we move to IDLE. 238 * 239 * 240 * Writing only one dummy transaction can get appended to 241 * one file space allocation. When this happens, the log recovery 242 * code replays the space allocation and a file could be truncated. 243 * This is why we have the NEED2 and DONE2 states before going idle. 244 */ 245 246 #define XLOG_STATE_COVER_IDLE 0 247 #define XLOG_STATE_COVER_NEED 1 248 #define XLOG_STATE_COVER_DONE 2 249 #define XLOG_STATE_COVER_NEED2 3 250 #define XLOG_STATE_COVER_DONE2 4 251 252 #define XLOG_COVER_OPS 5 253 254 255 /* Ticket reservation region accounting */ 256 #if defined(XFS_LOG_RES_DEBUG) 257 #define XLOG_TIC_LEN_MAX 15 258 #define XLOG_TIC_RESET_RES(t) ((t)->t_res_num = \ 259 (t)->t_res_arr_sum = (t)->t_res_num_ophdrs = 0) 260 #define XLOG_TIC_ADD_OPHDR(t) ((t)->t_res_num_ophdrs++) 261 #define XLOG_TIC_ADD_REGION(t, len, type) \ 262 do { \ 263 if ((t)->t_res_num == XLOG_TIC_LEN_MAX) { \ 264 /* add to overflow and start again */ \ 265 (t)->t_res_o_flow += (t)->t_res_arr_sum; \ 266 (t)->t_res_num = 0; \ 267 (t)->t_res_arr_sum = 0; \ 268 } \ 269 (t)->t_res_arr[(t)->t_res_num].r_len = (len); \ 270 (t)->t_res_arr[(t)->t_res_num].r_type = (type); \ 271 (t)->t_res_arr_sum += (len); \ 272 (t)->t_res_num++; \ 273 } while (0) 274 275 /* 276 * Reservation region 277 * As would be stored in xfs_log_iovec but without the i_addr which 278 * we don't care about. 279 */ 280 typedef struct xlog_res { 281 uint r_len; 282 uint r_type; 283 } xlog_res_t; 284 #else 285 #define XLOG_TIC_RESET_RES(t) 286 #define XLOG_TIC_ADD_OPHDR(t) 287 #define XLOG_TIC_ADD_REGION(t, len, type) 288 #endif 289 290 291 typedef struct xlog_ticket { 292 sv_t t_sema; /* sleep on this semaphore : 20 */ 293 struct xlog_ticket *t_next; /* :4|8 */ 294 struct xlog_ticket *t_prev; /* :4|8 */ 295 xlog_tid_t t_tid; /* transaction identifier : 4 */ 296 int t_curr_res; /* current reservation in bytes : 4 */ 297 int t_unit_res; /* unit reservation in bytes : 4 */ 298 char t_ocnt; /* original count : 1 */ 299 char t_cnt; /* current count : 1 */ 300 char t_clientid; /* who does this belong to; : 1 */ 301 char t_flags; /* properties of reservation : 1 */ 302 uint t_trans_type; /* transaction type : 4 */ 303 304 #if defined (XFS_LOG_RES_DEBUG) 305 /* reservation array fields */ 306 uint t_res_num; /* num in array : 4 */ 307 xlog_res_t t_res_arr[XLOG_TIC_LEN_MAX]; /* array of res : X */ 308 uint t_res_num_ophdrs; /* num op hdrs : 4 */ 309 uint t_res_arr_sum; /* array sum : 4 */ 310 uint t_res_o_flow; /* sum overflow : 4 */ 311 #endif 312 } xlog_ticket_t; 313 314 #endif 315 316 317 typedef struct xlog_op_header { 318 xlog_tid_t oh_tid; /* transaction id of operation : 4 b */ 319 int oh_len; /* bytes in data region : 4 b */ 320 __uint8_t oh_clientid; /* who sent me this : 1 b */ 321 __uint8_t oh_flags; /* : 1 b */ 322 ushort oh_res2; /* 32 bit align : 2 b */ 323 } xlog_op_header_t; 324 325 326 /* valid values for h_fmt */ 327 #define XLOG_FMT_UNKNOWN 0 328 #define XLOG_FMT_LINUX_LE 1 329 #define XLOG_FMT_LINUX_BE 2 330 #define XLOG_FMT_IRIX_BE 3 331 332 /* our fmt */ 333 #ifdef XFS_NATIVE_HOST 334 #define XLOG_FMT XLOG_FMT_LINUX_BE 335 #else 336 #define XLOG_FMT XLOG_FMT_LINUX_LE 337 #endif 338 339 typedef struct xlog_rec_header { 340 uint h_magicno; /* log record (LR) identifier : 4 */ 341 uint h_cycle; /* write cycle of log : 4 */ 342 int h_version; /* LR version : 4 */ 343 int h_len; /* len in bytes; should be 64-bit aligned: 4 */ 344 xfs_lsn_t h_lsn; /* lsn of this LR : 8 */ 345 xfs_lsn_t h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */ 346 uint h_chksum; /* may not be used; non-zero if used : 4 */ 347 int h_prev_block; /* block number to previous LR : 4 */ 348 int h_num_logops; /* number of log operations in this LR : 4 */ 349 uint h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; 350 /* new fields */ 351 int h_fmt; /* format of log record : 4 */ 352 uuid_t h_fs_uuid; /* uuid of FS : 16 */ 353 int h_size; /* iclog size : 4 */ 354 } xlog_rec_header_t; 355 356 typedef struct xlog_rec_ext_header { 357 uint xh_cycle; /* write cycle of log : 4 */ 358 uint xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /* : 256 */ 359 } xlog_rec_ext_header_t; 360 361 #ifdef __KERNEL__ 362 /* 363 * - A log record header is 512 bytes. There is plenty of room to grow the 364 * xlog_rec_header_t into the reserved space. 365 * - ic_data follows, so a write to disk can start at the beginning of 366 * the iclog. 367 * - ic_forcesema is used to implement synchronous forcing of the iclog to disk. 368 * - ic_next is the pointer to the next iclog in the ring. 369 * - ic_bp is a pointer to the buffer used to write this incore log to disk. 370 * - ic_log is a pointer back to the global log structure. 371 * - ic_callback is a linked list of callback function/argument pairs to be 372 * called after an iclog finishes writing. 373 * - ic_size is the full size of the header plus data. 374 * - ic_offset is the current number of bytes written to in this iclog. 375 * - ic_refcnt is bumped when someone is writing to the log. 376 * - ic_state is the state of the iclog. 377 */ 378 typedef struct xlog_iclog_fields { 379 sv_t ic_forcesema; 380 sv_t ic_writesema; 381 struct xlog_in_core *ic_next; 382 struct xlog_in_core *ic_prev; 383 struct xfs_buf *ic_bp; 384 struct log *ic_log; 385 xfs_log_callback_t *ic_callback; 386 xfs_log_callback_t **ic_callback_tail; 387 #ifdef XFS_LOG_TRACE 388 struct ktrace *ic_trace; 389 #endif 390 int ic_size; 391 int ic_offset; 392 int ic_refcnt; 393 int ic_bwritecnt; 394 ushort_t ic_state; 395 char *ic_datap; /* pointer to iclog data */ 396 } xlog_iclog_fields_t; 397 398 typedef union xlog_in_core2 { 399 xlog_rec_header_t hic_header; 400 xlog_rec_ext_header_t hic_xheader; 401 char hic_sector[XLOG_HEADER_SIZE]; 402 } xlog_in_core_2_t; 403 404 typedef struct xlog_in_core { 405 xlog_iclog_fields_t hic_fields; 406 xlog_in_core_2_t *hic_data; 407 } xlog_in_core_t; 408 409 /* 410 * Defines to save our code from this glop. 411 */ 412 #define ic_forcesema hic_fields.ic_forcesema 413 #define ic_writesema hic_fields.ic_writesema 414 #define ic_next hic_fields.ic_next 415 #define ic_prev hic_fields.ic_prev 416 #define ic_bp hic_fields.ic_bp 417 #define ic_log hic_fields.ic_log 418 #define ic_callback hic_fields.ic_callback 419 #define ic_callback_tail hic_fields.ic_callback_tail 420 #define ic_trace hic_fields.ic_trace 421 #define ic_size hic_fields.ic_size 422 #define ic_offset hic_fields.ic_offset 423 #define ic_refcnt hic_fields.ic_refcnt 424 #define ic_bwritecnt hic_fields.ic_bwritecnt 425 #define ic_state hic_fields.ic_state 426 #define ic_datap hic_fields.ic_datap 427 #define ic_header hic_data->hic_header 428 429 /* 430 * The reservation head lsn is not made up of a cycle number and block number. 431 * Instead, it uses a cycle number and byte number. Logs don't expect to 432 * overflow 31 bits worth of byte offset, so using a byte number will mean 433 * that round off problems won't occur when releasing partial reservations. 434 */ 435 typedef struct log { 436 /* The following block of fields are changed while holding icloglock */ 437 sema_t l_flushsema; /* iclog flushing semaphore */ 438 int l_flushcnt; /* # of procs waiting on this 439 * sema */ 440 int l_ticket_cnt; /* free ticket count */ 441 int l_ticket_tcnt; /* total ticket count */ 442 int l_covered_state;/* state of "covering disk 443 * log entries" */ 444 xlog_ticket_t *l_freelist; /* free list of tickets */ 445 xlog_ticket_t *l_unmount_free;/* kmem_free these addresses */ 446 xlog_ticket_t *l_tail; /* free list of tickets */ 447 xlog_in_core_t *l_iclog; /* head log queue */ 448 lock_t l_icloglock; /* grab to change iclog state */ 449 xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed 450 * buffers */ 451 xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */ 452 struct xfs_mount *l_mp; /* mount point */ 453 struct xfs_buf *l_xbuf; /* extra buffer for log 454 * wrapping */ 455 struct xfs_buftarg *l_targ; /* buftarg of log */ 456 xfs_daddr_t l_logBBstart; /* start block of log */ 457 int l_logsize; /* size of log in bytes */ 458 int l_logBBsize; /* size of log in BB chunks */ 459 int l_curr_cycle; /* Cycle number of log writes */ 460 int l_prev_cycle; /* Cycle number before last 461 * block increment */ 462 int l_curr_block; /* current logical log block */ 463 int l_prev_block; /* previous logical log block */ 464 int l_iclog_size; /* size of log in bytes */ 465 int l_iclog_size_log; /* log power size of log */ 466 int l_iclog_bufs; /* number of iclog buffers */ 467 468 /* The following field are used for debugging; need to hold icloglock */ 469 char *l_iclog_bak[XLOG_MAX_ICLOGS]; 470 471 /* The following block of fields are changed while holding grant_lock */ 472 lock_t l_grant_lock; 473 xlog_ticket_t *l_reserve_headq; 474 xlog_ticket_t *l_write_headq; 475 int l_grant_reserve_cycle; 476 int l_grant_reserve_bytes; 477 int l_grant_write_cycle; 478 int l_grant_write_bytes; 479 480 /* The following fields don't need locking */ 481 #ifdef XFS_LOG_TRACE 482 struct ktrace *l_trace; 483 struct ktrace *l_grant_trace; 484 #endif 485 uint l_flags; 486 uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */ 487 struct xfs_buf_cancel **l_buf_cancel_table; 488 int l_iclog_hsize; /* size of iclog header */ 489 int l_iclog_heads; /* # of iclog header sectors */ 490 uint l_sectbb_log; /* log2 of sector size in BBs */ 491 uint l_sectbb_mask; /* sector size (in BBs) 492 * alignment mask */ 493 } xlog_t; 494 495 #define XLOG_FORCED_SHUTDOWN(log) ((log)->l_flags & XLOG_IO_ERROR) 496 497 #define XLOG_GRANT_SUB_SPACE(log,bytes,type) \ 498 { \ 499 if (type == 'w') { \ 500 (log)->l_grant_write_bytes -= (bytes); \ 501 if ((log)->l_grant_write_bytes < 0) { \ 502 (log)->l_grant_write_bytes += (log)->l_logsize; \ 503 (log)->l_grant_write_cycle--; \ 504 } \ 505 } else { \ 506 (log)->l_grant_reserve_bytes -= (bytes); \ 507 if ((log)->l_grant_reserve_bytes < 0) { \ 508 (log)->l_grant_reserve_bytes += (log)->l_logsize;\ 509 (log)->l_grant_reserve_cycle--; \ 510 } \ 511 } \ 512 } 513 #define XLOG_GRANT_ADD_SPACE(log,bytes,type) \ 514 { \ 515 if (type == 'w') { \ 516 (log)->l_grant_write_bytes += (bytes); \ 517 if ((log)->l_grant_write_bytes > (log)->l_logsize) { \ 518 (log)->l_grant_write_bytes -= (log)->l_logsize; \ 519 (log)->l_grant_write_cycle++; \ 520 } \ 521 } else { \ 522 (log)->l_grant_reserve_bytes += (bytes); \ 523 if ((log)->l_grant_reserve_bytes > (log)->l_logsize) { \ 524 (log)->l_grant_reserve_bytes -= (log)->l_logsize;\ 525 (log)->l_grant_reserve_cycle++; \ 526 } \ 527 } \ 528 } 529 #define XLOG_INS_TICKETQ(q, tic) \ 530 { \ 531 if (q) { \ 532 (tic)->t_next = (q); \ 533 (tic)->t_prev = (q)->t_prev; \ 534 (q)->t_prev->t_next = (tic); \ 535 (q)->t_prev = (tic); \ 536 } else { \ 537 (tic)->t_prev = (tic)->t_next = (tic); \ 538 (q) = (tic); \ 539 } \ 540 (tic)->t_flags |= XLOG_TIC_IN_Q; \ 541 } 542 #define XLOG_DEL_TICKETQ(q, tic) \ 543 { \ 544 if ((tic) == (tic)->t_next) { \ 545 (q) = NULL; \ 546 } else { \ 547 (q) = (tic)->t_next; \ 548 (tic)->t_next->t_prev = (tic)->t_prev; \ 549 (tic)->t_prev->t_next = (tic)->t_next; \ 550 } \ 551 (tic)->t_next = (tic)->t_prev = NULL; \ 552 (tic)->t_flags &= ~XLOG_TIC_IN_Q; \ 553 } 554 555 /* common routines */ 556 extern xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); 557 extern int xlog_find_tail(xlog_t *log, 558 xfs_daddr_t *head_blk, 559 xfs_daddr_t *tail_blk, 560 int readonly); 561 extern int xlog_recover(xlog_t *log, int readonly); 562 extern int xlog_recover_finish(xlog_t *log, int mfsi_flags); 563 extern void xlog_pack_data(xlog_t *log, xlog_in_core_t *iclog, int); 564 extern void xlog_recover_process_iunlinks(xlog_t *log); 565 566 extern struct xfs_buf *xlog_get_bp(xlog_t *, int); 567 extern void xlog_put_bp(struct xfs_buf *); 568 extern int xlog_bread(xlog_t *, xfs_daddr_t, int, struct xfs_buf *); 569 570 /* iclog tracing */ 571 #define XLOG_TRACE_GRAB_FLUSH 1 572 #define XLOG_TRACE_REL_FLUSH 2 573 #define XLOG_TRACE_SLEEP_FLUSH 3 574 #define XLOG_TRACE_WAKE_FLUSH 4 575 576 #endif /* __KERNEL__ */ 577 578 #endif /* __XFS_LOG_PRIV_H__ */ 579