Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
| 18 | #ifndef __XFS_LOG_PRIV_H__ |
| 19 | #define __XFS_LOG_PRIV_H__ |
| 20 | |
| 21 | struct xfs_buf; |
| 22 | struct ktrace; |
| 23 | struct log; |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | struct xlog_ticket; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Nathan Scott | f016bad | 2005-09-08 15:30:05 +1000 | [diff] [blame] | 102 | #ifndef XFS_NATIVE_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Tim Shimmin | 7e9c639 | 2005-09-02 16:42:05 +1000 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | typedef struct xlog_ticket { |
Tim Shimmin | 7e9c639 | 2005-09-02 16:42:05 +1000 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } xlog_ticket_t; |
Tim Shimmin | 7e9c639 | 2005-09-02 16:42:05 +1000 | [diff] [blame] | 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Nathan Scott | f016bad | 2005-09-08 15:30:05 +1000 | [diff] [blame] | 333 | #ifdef XFS_NATIVE_HOST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | #define XLOG_FMT XLOG_FMT_LINUX_BE |
| 335 | #else |
Nathan Scott | f016bad | 2005-09-08 15:30:05 +1000 | [diff] [blame] | 336 | #define XLOG_FMT XLOG_FMT_LINUX_LE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Nathan Scott | cfcbbbd | 2005-11-02 15:12:04 +1100 | [diff] [blame] | 495 | #define XLOG_FORCED_SHUTDOWN(log) ((log)->l_flags & XLOG_IO_ERROR) |
| 496 | |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 497 | #define XLOG_GRANT_SUB_SPACE(log,bytes,type) \ |
| 498 | xlog_grant_sub_space(log,bytes,type) |
| 499 | static inline void xlog_grant_sub_space(struct log *log, int bytes, int type) |
| 500 | { |
| 501 | if (type == 'w') { \ |
| 502 | (log)->l_grant_write_bytes -= (bytes); \ |
| 503 | if ((log)->l_grant_write_bytes < 0) { \ |
| 504 | (log)->l_grant_write_bytes += (log)->l_logsize; \ |
| 505 | (log)->l_grant_write_cycle--; \ |
| 506 | } \ |
| 507 | } else { \ |
| 508 | (log)->l_grant_reserve_bytes -= (bytes); \ |
| 509 | if ((log)->l_grant_reserve_bytes < 0) { \ |
| 510 | (log)->l_grant_reserve_bytes += (log)->l_logsize;\ |
| 511 | (log)->l_grant_reserve_cycle--; \ |
| 512 | } \ |
| 513 | } \ |
| 514 | } |
| 515 | |
| 516 | #define XLOG_GRANT_ADD_SPACE(log,bytes,type) \ |
| 517 | xlog_grant_add_space(log,bytes,type) |
| 518 | static inline void |
| 519 | xlog_grant_add_space(struct log *log, int bytes, int type) |
| 520 | { |
| 521 | if (type == 'w') { \ |
| 522 | (log)->l_grant_write_bytes += (bytes); \ |
| 523 | if ((log)->l_grant_write_bytes > (log)->l_logsize) { \ |
| 524 | (log)->l_grant_write_bytes -= (log)->l_logsize; \ |
| 525 | (log)->l_grant_write_cycle++; \ |
| 526 | } \ |
| 527 | } else { \ |
| 528 | (log)->l_grant_reserve_bytes += (bytes); \ |
| 529 | if ((log)->l_grant_reserve_bytes > (log)->l_logsize) { \ |
| 530 | (log)->l_grant_reserve_bytes -= (log)->l_logsize;\ |
| 531 | (log)->l_grant_reserve_cycle++; \ |
| 532 | } \ |
| 533 | } \ |
| 534 | } |
| 535 | |
| 536 | #define XLOG_INS_TICKETQ(q, tic) xlog_ins_ticketq(q, tic) |
| 537 | static inline void |
| 538 | xlog_ins_ticketq(struct xlog_ticket *q, struct xlog_ticket *tic) |
| 539 | { \ |
| 540 | if (q) { \ |
| 541 | (tic)->t_next = (q); \ |
| 542 | (tic)->t_prev = (q)->t_prev; \ |
| 543 | (q)->t_prev->t_next = (tic); \ |
| 544 | (q)->t_prev = (tic); \ |
| 545 | } else { \ |
| 546 | (tic)->t_prev = (tic)->t_next = (tic); \ |
| 547 | (q) = (tic); \ |
| 548 | } \ |
| 549 | (tic)->t_flags |= XLOG_TIC_IN_Q; \ |
| 550 | } |
| 551 | |
| 552 | #define XLOG_DEL_TICKETQ(q, tic) xlog_del_ticketq(q, tic) |
| 553 | static inline void |
| 554 | xlog_del_ticketq(struct xlog_ticket *q, struct xlog_ticket *tic) |
| 555 | { \ |
| 556 | if ((tic) == (tic)->t_next) { \ |
| 557 | (q) = NULL; \ |
| 558 | } else { \ |
| 559 | (q) = (tic)->t_next; \ |
| 560 | (tic)->t_next->t_prev = (tic)->t_prev; \ |
| 561 | (tic)->t_prev->t_next = (tic)->t_next; \ |
| 562 | } \ |
| 563 | (tic)->t_next = (tic)->t_prev = NULL; \ |
| 564 | (tic)->t_flags &= ~XLOG_TIC_IN_Q; \ |
| 565 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | /* common routines */ |
| 568 | extern xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | extern int xlog_find_tail(xlog_t *log, |
| 570 | xfs_daddr_t *head_blk, |
| 571 | xfs_daddr_t *tail_blk, |
| 572 | int readonly); |
| 573 | extern int xlog_recover(xlog_t *log, int readonly); |
| 574 | extern int xlog_recover_finish(xlog_t *log, int mfsi_flags); |
| 575 | extern void xlog_pack_data(xlog_t *log, xlog_in_core_t *iclog, int); |
| 576 | extern void xlog_recover_process_iunlinks(xlog_t *log); |
| 577 | |
| 578 | extern struct xfs_buf *xlog_get_bp(xlog_t *, int); |
| 579 | extern void xlog_put_bp(struct xfs_buf *); |
| 580 | extern int xlog_bread(xlog_t *, xfs_daddr_t, int, struct xfs_buf *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | /* iclog tracing */ |
| 583 | #define XLOG_TRACE_GRAB_FLUSH 1 |
| 584 | #define XLOG_TRACE_REL_FLUSH 2 |
| 585 | #define XLOG_TRACE_SLEEP_FLUSH 3 |
| 586 | #define XLOG_TRACE_WAKE_FLUSH 4 |
| 587 | |
| 588 | #endif /* __KERNEL__ */ |
| 589 | |
| 590 | #endif /* __XFS_LOG_PRIV_H__ */ |