1153323Srodrigc/* 2159451Srodrigc * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 3159451Srodrigc * All Rights Reserved. 4153323Srodrigc * 5159451Srodrigc * This program is free software; you can redistribute it and/or 6159451Srodrigc * modify it under the terms of the GNU General Public License as 7153323Srodrigc * published by the Free Software Foundation. 8153323Srodrigc * 9159451Srodrigc * This program is distributed in the hope that it would be useful, 10159451Srodrigc * but WITHOUT ANY WARRANTY; without even the implied warranty of 11159451Srodrigc * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12159451Srodrigc * GNU General Public License for more details. 13153323Srodrigc * 14159451Srodrigc * You should have received a copy of the GNU General Public License 15159451Srodrigc * along with this program; if not, write the Free Software Foundation, 16159451Srodrigc * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17153323Srodrigc */ 18153323Srodrigc#ifndef __XFS_LOG_PRIV_H__ 19153323Srodrigc#define __XFS_LOG_PRIV_H__ 20153323Srodrigc 21153323Srodrigcstruct xfs_buf; 22153323Srodrigcstruct ktrace; 23153323Srodrigcstruct log; 24159451Srodrigcstruct xlog_ticket; 25153323Srodrigcstruct xfs_buf_cancel; 26153323Srodrigcstruct xfs_mount; 27153323Srodrigc 28153323Srodrigc/* 29153323Srodrigc * Macros, structures, prototypes for internal log manager use. 30153323Srodrigc */ 31153323Srodrigc 32153323Srodrigc#define XLOG_MIN_ICLOGS 2 33153323Srodrigc#define XLOG_MED_ICLOGS 4 34153323Srodrigc#define XLOG_MAX_ICLOGS 8 35153323Srodrigc#define XLOG_CALLBACK_SIZE 10 36153323Srodrigc#define XLOG_HEADER_MAGIC_NUM 0xFEEDbabe /* Invalid cycle number */ 37153323Srodrigc#define XLOG_VERSION_1 1 38153323Srodrigc#define XLOG_VERSION_2 2 /* Large IClogs, Log sunit */ 39153323Srodrigc#define XLOG_VERSION_OKBITS (XLOG_VERSION_1 | XLOG_VERSION_2) 40153323Srodrigc#define XLOG_RECORD_BSIZE (16*1024) /* eventually 32k */ 41153323Srodrigc#define XLOG_BIG_RECORD_BSIZE (32*1024) /* 32k buffers */ 42153323Srodrigc#define XLOG_MAX_RECORD_BSIZE (256*1024) 43153323Srodrigc#define XLOG_HEADER_CYCLE_SIZE (32*1024) /* cycle data in header */ 44153323Srodrigc#define XLOG_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */ 45153323Srodrigc#define XLOG_BIG_RECORD_BSHIFT 15 /* 32k == 1 << 15 */ 46153323Srodrigc#define XLOG_MAX_RECORD_BSHIFT 18 /* 256k == 1 << 18 */ 47153323Srodrigc#define XLOG_BTOLSUNIT(log, b) (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \ 48153323Srodrigc (log)->l_mp->m_sb.sb_logsunit) 49153323Srodrigc#define XLOG_LSUNITTOB(log, su) ((su) * (log)->l_mp->m_sb.sb_logsunit) 50153323Srodrigc 51153323Srodrigc#define XLOG_HEADER_SIZE 512 52153323Srodrigc 53153323Srodrigc#define XLOG_REC_SHIFT(log) \ 54153323Srodrigc BTOBB(1 << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \ 55153323Srodrigc XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) 56153323Srodrigc#define XLOG_TOTAL_REC_SHIFT(log) \ 57153323Srodrigc BTOBB(XLOG_MAX_ICLOGS << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \ 58153323Srodrigc XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) 59153323Srodrigc 60153323Srodrigc/* 61153323Srodrigc * set lsns 62153323Srodrigc */ 63153323Srodrigc 64159451Srodrigc#define ASSIGN_ANY_LSN_HOST(lsn,cycle,block) \ 65153323Srodrigc { \ 66159451Srodrigc (lsn) = ((xfs_lsn_t)(cycle)<<32)|(block); \ 67153323Srodrigc } 68159451Srodrigc#define ASSIGN_ANY_LSN_DISK(lsn,cycle,block) \ 69159451Srodrigc { \ 70159451Srodrigc INT_SET(((uint *)&(lsn))[0], ARCH_CONVERT, (cycle)); \ 71159451Srodrigc INT_SET(((uint *)&(lsn))[1], ARCH_CONVERT, (block)); \ 72159451Srodrigc } 73159451Srodrigc#define ASSIGN_LSN(lsn,log) \ 74159451Srodrigc ASSIGN_ANY_LSN_DISK(lsn,(log)->l_curr_cycle,(log)->l_curr_block); 75153323Srodrigc 76153323Srodrigc#define XLOG_SET(f,b) (((f) & (b)) == (b)) 77153323Srodrigc 78153323Srodrigc#define GET_CYCLE(ptr, arch) \ 79153323Srodrigc (INT_GET(*(uint *)(ptr), arch) == XLOG_HEADER_MAGIC_NUM ? \ 80153323Srodrigc INT_GET(*((uint *)(ptr)+1), arch) : \ 81153323Srodrigc INT_GET(*(uint *)(ptr), arch) \ 82153323Srodrigc ) 83153323Srodrigc 84153323Srodrigc#define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1) 85153323Srodrigc 86153323Srodrigc 87153323Srodrigc#ifdef __KERNEL__ 88153323Srodrigc 89153323Srodrigc/* 90153323Srodrigc * get client id from packed copy. 91153323Srodrigc * 92153323Srodrigc * this hack is here because the xlog_pack code copies four bytes 93153323Srodrigc * of xlog_op_header containing the fields oh_clientid, oh_flags 94153323Srodrigc * and oh_res2 into the packed copy. 95153323Srodrigc * 96153323Srodrigc * later on this four byte chunk is treated as an int and the 97153323Srodrigc * client id is pulled out. 98153323Srodrigc * 99153323Srodrigc * this has endian issues, of course. 100153323Srodrigc */ 101153323Srodrigc 102159451Srodrigc#ifndef XFS_NATIVE_HOST 103153323Srodrigc#define GET_CLIENT_ID(i,arch) \ 104153323Srodrigc ((i) & 0xff) 105153323Srodrigc#else 106153323Srodrigc#define GET_CLIENT_ID(i,arch) \ 107153323Srodrigc ((i) >> 24) 108153323Srodrigc#endif 109153323Srodrigc 110153323Srodrigc#define GRANT_LOCK(log) mutex_spinlock(&(log)->l_grant_lock) 111153323Srodrigc#define GRANT_UNLOCK(log, s) mutex_spinunlock(&(log)->l_grant_lock, s) 112153323Srodrigc#define LOG_LOCK(log) mutex_spinlock(&(log)->l_icloglock) 113153323Srodrigc#define LOG_UNLOCK(log, s) mutex_spinunlock(&(log)->l_icloglock, s) 114153323Srodrigc 115153323Srodrigc#define xlog_panic(args...) cmn_err(CE_PANIC, ## args) 116153323Srodrigc#define xlog_exit(args...) cmn_err(CE_PANIC, ## args) 117153323Srodrigc#define xlog_warn(args...) cmn_err(CE_WARN, ## args) 118153323Srodrigc 119153323Srodrigc/* 120153323Srodrigc * In core log state 121153323Srodrigc */ 122153323Srodrigc#define XLOG_STATE_ACTIVE 0x0001 /* Current IC log being written to */ 123153323Srodrigc#define XLOG_STATE_WANT_SYNC 0x0002 /* Want to sync this iclog; no more writes */ 124153323Srodrigc#define XLOG_STATE_SYNCING 0x0004 /* This IC log is syncing */ 125153323Srodrigc#define XLOG_STATE_DONE_SYNC 0x0008 /* Done syncing to disk */ 126153323Srodrigc#define XLOG_STATE_DO_CALLBACK \ 127153323Srodrigc 0x0010 /* Process callback functions */ 128153323Srodrigc#define XLOG_STATE_CALLBACK 0x0020 /* Callback functions now */ 129153323Srodrigc#define XLOG_STATE_DIRTY 0x0040 /* Dirty IC log, not ready for ACTIVE status*/ 130153323Srodrigc#define XLOG_STATE_IOERROR 0x0080 /* IO error happened in sync'ing log */ 131153323Srodrigc#define XLOG_STATE_ALL 0x7FFF /* All possible valid flags */ 132153323Srodrigc#define XLOG_STATE_NOTUSED 0x8000 /* This IC log not being used */ 133153323Srodrigc#endif /* __KERNEL__ */ 134153323Srodrigc 135153323Srodrigc/* 136153323Srodrigc * Flags to log operation header 137153323Srodrigc * 138153323Srodrigc * The first write of a new transaction will be preceded with a start 139153323Srodrigc * record, XLOG_START_TRANS. Once a transaction is committed, a commit 140153323Srodrigc * record is written, XLOG_COMMIT_TRANS. If a single region can not fit into 141153323Srodrigc * the remainder of the current active in-core log, it is split up into 142153323Srodrigc * multiple regions. Each partial region will be marked with a 143153323Srodrigc * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS. 144153323Srodrigc * 145153323Srodrigc */ 146153323Srodrigc#define XLOG_START_TRANS 0x01 /* Start a new transaction */ 147153323Srodrigc#define XLOG_COMMIT_TRANS 0x02 /* Commit this transaction */ 148153323Srodrigc#define XLOG_CONTINUE_TRANS 0x04 /* Cont this trans into new region */ 149153323Srodrigc#define XLOG_WAS_CONT_TRANS 0x08 /* Cont this trans into new region */ 150153323Srodrigc#define XLOG_END_TRANS 0x10 /* End a continued transaction */ 151153323Srodrigc#define XLOG_UNMOUNT_TRANS 0x20 /* Unmount a filesystem transaction */ 152153323Srodrigc#define XLOG_SKIP_TRANS (XLOG_COMMIT_TRANS | XLOG_CONTINUE_TRANS | \ 153153323Srodrigc XLOG_WAS_CONT_TRANS | XLOG_END_TRANS | \ 154153323Srodrigc XLOG_UNMOUNT_TRANS) 155153323Srodrigc 156153323Srodrigc#ifdef __KERNEL__ 157153323Srodrigc/* 158153323Srodrigc * Flags to log ticket 159153323Srodrigc */ 160153323Srodrigc#define XLOG_TIC_INITED 0x1 /* has been initialized */ 161153323Srodrigc#define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */ 162153323Srodrigc#define XLOG_TIC_IN_Q 0x4 163153323Srodrigc#endif /* __KERNEL__ */ 164153323Srodrigc 165153323Srodrigc#define XLOG_UNMOUNT_TYPE 0x556e /* Un for Unmount */ 166153323Srodrigc 167153323Srodrigc/* 168153323Srodrigc * Flags for log structure 169153323Srodrigc */ 170153323Srodrigc#define XLOG_CHKSUM_MISMATCH 0x1 /* used only during recovery */ 171153323Srodrigc#define XLOG_ACTIVE_RECOVERY 0x2 /* in the middle of recovery */ 172153323Srodrigc#define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */ 173153323Srodrigc#define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being 174153323Srodrigc shutdown */ 175153323Srodrigctypedef __uint32_t xlog_tid_t; 176153323Srodrigc 177153323Srodrigc 178153323Srodrigc#ifdef __KERNEL__ 179153323Srodrigc/* 180153323Srodrigc * Below are states for covering allocation transactions. 181153323Srodrigc * By covering, we mean changing the h_tail_lsn in the last on-disk 182153323Srodrigc * log write such that no allocation transactions will be re-done during 183153323Srodrigc * recovery after a system crash. Recovery starts at the last on-disk 184153323Srodrigc * log write. 185153323Srodrigc * 186153323Srodrigc * These states are used to insert dummy log entries to cover 187153323Srodrigc * space allocation transactions which can undo non-transactional changes 188153323Srodrigc * after a crash. Writes to a file with space 189153323Srodrigc * already allocated do not result in any transactions. Allocations 190153323Srodrigc * might include space beyond the EOF. So if we just push the EOF a 191153323Srodrigc * little, the last transaction for the file could contain the wrong 192153323Srodrigc * size. If there is no file system activity, after an allocation 193153323Srodrigc * transaction, and the system crashes, the allocation transaction 194153323Srodrigc * will get replayed and the file will be truncated. This could 195153323Srodrigc * be hours/days/... after the allocation occurred. 196153323Srodrigc * 197153323Srodrigc * The fix for this is to do two dummy transactions when the 198153323Srodrigc * system is idle. We need two dummy transaction because the h_tail_lsn 199153323Srodrigc * in the log record header needs to point beyond the last possible 200153323Srodrigc * non-dummy transaction. The first dummy changes the h_tail_lsn to 201153323Srodrigc * the first transaction before the dummy. The second dummy causes 202153323Srodrigc * h_tail_lsn to point to the first dummy. Recovery starts at h_tail_lsn. 203153323Srodrigc * 204153323Srodrigc * These dummy transactions get committed when everything 205153323Srodrigc * is idle (after there has been some activity). 206153323Srodrigc * 207153323Srodrigc * There are 5 states used to control this. 208153323Srodrigc * 209153323Srodrigc * IDLE -- no logging has been done on the file system or 210153323Srodrigc * we are done covering previous transactions. 211153323Srodrigc * NEED -- logging has occurred and we need a dummy transaction 212153323Srodrigc * when the log becomes idle. 213153323Srodrigc * DONE -- we were in the NEED state and have committed a dummy 214153323Srodrigc * transaction. 215153323Srodrigc * NEED2 -- we detected that a dummy transaction has gone to the 216153323Srodrigc * on disk log with no other transactions. 217153323Srodrigc * DONE2 -- we committed a dummy transaction when in the NEED2 state. 218153323Srodrigc * 219153323Srodrigc * There are two places where we switch states: 220153323Srodrigc * 221153323Srodrigc * 1.) In xfs_sync, when we detect an idle log and are in NEED or NEED2. 222153323Srodrigc * We commit the dummy transaction and switch to DONE or DONE2, 223153323Srodrigc * respectively. In all other states, we don't do anything. 224153323Srodrigc * 225153323Srodrigc * 2.) When we finish writing the on-disk log (xlog_state_clean_log). 226153323Srodrigc * 227153323Srodrigc * No matter what state we are in, if this isn't the dummy 228153323Srodrigc * transaction going out, the next state is NEED. 229153323Srodrigc * So, if we aren't in the DONE or DONE2 states, the next state 230153323Srodrigc * is NEED. We can't be finishing a write of the dummy record 231153323Srodrigc * unless it was committed and the state switched to DONE or DONE2. 232153323Srodrigc * 233153323Srodrigc * If we are in the DONE state and this was a write of the 234153323Srodrigc * dummy transaction, we move to NEED2. 235153323Srodrigc * 236153323Srodrigc * If we are in the DONE2 state and this was a write of the 237153323Srodrigc * dummy transaction, we move to IDLE. 238153323Srodrigc * 239153323Srodrigc * 240153323Srodrigc * Writing only one dummy transaction can get appended to 241153323Srodrigc * one file space allocation. When this happens, the log recovery 242153323Srodrigc * code replays the space allocation and a file could be truncated. 243153323Srodrigc * This is why we have the NEED2 and DONE2 states before going idle. 244153323Srodrigc */ 245153323Srodrigc 246153323Srodrigc#define XLOG_STATE_COVER_IDLE 0 247153323Srodrigc#define XLOG_STATE_COVER_NEED 1 248153323Srodrigc#define XLOG_STATE_COVER_DONE 2 249153323Srodrigc#define XLOG_STATE_COVER_NEED2 3 250153323Srodrigc#define XLOG_STATE_COVER_DONE2 4 251153323Srodrigc 252153323Srodrigc#define XLOG_COVER_OPS 5 253153323Srodrigc 254159451Srodrigc 255159451Srodrigc/* Ticket reservation region accounting */ 256159451Srodrigc#define XLOG_TIC_LEN_MAX 15 257159451Srodrigc#define XLOG_TIC_RESET_RES(t) ((t)->t_res_num = \ 258159451Srodrigc (t)->t_res_arr_sum = (t)->t_res_num_ophdrs = 0) 259159451Srodrigc#define XLOG_TIC_ADD_OPHDR(t) ((t)->t_res_num_ophdrs++) 260159451Srodrigc#define XLOG_TIC_ADD_REGION(t, len, type) \ 261159451Srodrigc do { \ 262159451Srodrigc if ((t)->t_res_num == XLOG_TIC_LEN_MAX) { \ 263159451Srodrigc /* add to overflow and start again */ \ 264159451Srodrigc (t)->t_res_o_flow += (t)->t_res_arr_sum; \ 265159451Srodrigc (t)->t_res_num = 0; \ 266159451Srodrigc (t)->t_res_arr_sum = 0; \ 267159451Srodrigc } \ 268159451Srodrigc (t)->t_res_arr[(t)->t_res_num].r_len = (len); \ 269159451Srodrigc (t)->t_res_arr[(t)->t_res_num].r_type = (type); \ 270159451Srodrigc (t)->t_res_arr_sum += (len); \ 271159451Srodrigc (t)->t_res_num++; \ 272159451Srodrigc } while (0) 273159451Srodrigc 274159451Srodrigc/* 275159451Srodrigc * Reservation region 276159451Srodrigc * As would be stored in xfs_log_iovec but without the i_addr which 277159451Srodrigc * we don't care about. 278159451Srodrigc */ 279159451Srodrigctypedef struct xlog_res { 280159451Srodrigc uint r_len; /* region length :4 */ 281159451Srodrigc uint r_type; /* region's transaction type :4 */ 282159451Srodrigc} xlog_res_t; 283159451Srodrigc 284153323Srodrigctypedef struct xlog_ticket { 285159451Srodrigc sv_t t_sema; /* sleep on this semaphore : 20 */ 286159451Srodrigc struct xlog_ticket *t_next; /* :4|8 */ 287159451Srodrigc struct xlog_ticket *t_prev; /* :4|8 */ 288159451Srodrigc xlog_tid_t t_tid; /* transaction identifier : 4 */ 289159451Srodrigc int t_curr_res; /* current reservation in bytes : 4 */ 290159451Srodrigc int t_unit_res; /* unit reservation in bytes : 4 */ 291159451Srodrigc char t_ocnt; /* original count : 1 */ 292159451Srodrigc char t_cnt; /* current count : 1 */ 293159451Srodrigc char t_clientid; /* who does this belong to; : 1 */ 294159451Srodrigc char t_flags; /* properties of reservation : 1 */ 295159451Srodrigc uint t_trans_type; /* transaction type : 4 */ 296159451Srodrigc 297159451Srodrigc /* reservation array fields */ 298159451Srodrigc uint t_res_num; /* num in array : 4 */ 299159451Srodrigc uint t_res_num_ophdrs; /* num op hdrs : 4 */ 300159451Srodrigc uint t_res_arr_sum; /* array sum : 4 */ 301159451Srodrigc uint t_res_o_flow; /* sum overflow : 4 */ 302159451Srodrigc xlog_res_t t_res_arr[XLOG_TIC_LEN_MAX]; /* array of res : 8 * 15 */ 303153323Srodrigc} xlog_ticket_t; 304159451Srodrigc 305153323Srodrigc#endif 306153323Srodrigc 307153323Srodrigc 308153323Srodrigctypedef struct xlog_op_header { 309153323Srodrigc xlog_tid_t oh_tid; /* transaction id of operation : 4 b */ 310153323Srodrigc int oh_len; /* bytes in data region : 4 b */ 311153323Srodrigc __uint8_t oh_clientid; /* who sent me this : 1 b */ 312153323Srodrigc __uint8_t oh_flags; /* : 1 b */ 313153323Srodrigc ushort oh_res2; /* 32 bit align : 2 b */ 314153323Srodrigc} xlog_op_header_t; 315153323Srodrigc 316153323Srodrigc 317153323Srodrigc/* valid values for h_fmt */ 318153323Srodrigc#define XLOG_FMT_UNKNOWN 0 319153323Srodrigc#define XLOG_FMT_LINUX_LE 1 320153323Srodrigc#define XLOG_FMT_LINUX_BE 2 321153323Srodrigc#define XLOG_FMT_IRIX_BE 3 322153323Srodrigc 323153323Srodrigc/* our fmt */ 324159451Srodrigc#ifdef XFS_NATIVE_HOST 325153323Srodrigc#define XLOG_FMT XLOG_FMT_LINUX_BE 326153323Srodrigc#else 327159451Srodrigc#define XLOG_FMT XLOG_FMT_LINUX_LE 328153323Srodrigc#endif 329153323Srodrigc 330153323Srodrigctypedef struct xlog_rec_header { 331153323Srodrigc uint h_magicno; /* log record (LR) identifier : 4 */ 332153323Srodrigc uint h_cycle; /* write cycle of log : 4 */ 333153323Srodrigc int h_version; /* LR version : 4 */ 334153323Srodrigc int h_len; /* len in bytes; should be 64-bit aligned: 4 */ 335153323Srodrigc xfs_lsn_t h_lsn; /* lsn of this LR : 8 */ 336153323Srodrigc xfs_lsn_t h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */ 337153323Srodrigc uint h_chksum; /* may not be used; non-zero if used : 4 */ 338153323Srodrigc int h_prev_block; /* block number to previous LR : 4 */ 339153323Srodrigc int h_num_logops; /* number of log operations in this LR : 4 */ 340153323Srodrigc uint h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; 341153323Srodrigc /* new fields */ 342153323Srodrigc int h_fmt; /* format of log record : 4 */ 343153323Srodrigc uuid_t h_fs_uuid; /* uuid of FS : 16 */ 344153323Srodrigc int h_size; /* iclog size : 4 */ 345153323Srodrigc} xlog_rec_header_t; 346153323Srodrigc 347153323Srodrigctypedef struct xlog_rec_ext_header { 348153323Srodrigc uint xh_cycle; /* write cycle of log : 4 */ 349153323Srodrigc uint xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /* : 256 */ 350153323Srodrigc} xlog_rec_ext_header_t; 351153323Srodrigc 352153323Srodrigc#ifdef __KERNEL__ 353153323Srodrigc/* 354153323Srodrigc * - A log record header is 512 bytes. There is plenty of room to grow the 355153323Srodrigc * xlog_rec_header_t into the reserved space. 356153323Srodrigc * - ic_data follows, so a write to disk can start at the beginning of 357153323Srodrigc * the iclog. 358153323Srodrigc * - ic_forcesema is used to implement synchronous forcing of the iclog to disk. 359153323Srodrigc * - ic_next is the pointer to the next iclog in the ring. 360153323Srodrigc * - ic_bp is a pointer to the buffer used to write this incore log to disk. 361153323Srodrigc * - ic_log is a pointer back to the global log structure. 362153323Srodrigc * - ic_callback is a linked list of callback function/argument pairs to be 363153323Srodrigc * called after an iclog finishes writing. 364153323Srodrigc * - ic_size is the full size of the header plus data. 365153323Srodrigc * - ic_offset is the current number of bytes written to in this iclog. 366153323Srodrigc * - ic_refcnt is bumped when someone is writing to the log. 367153323Srodrigc * - ic_state is the state of the iclog. 368153323Srodrigc */ 369153323Srodrigctypedef struct xlog_iclog_fields { 370153323Srodrigc sv_t ic_forcesema; 371153323Srodrigc sv_t ic_writesema; 372153323Srodrigc struct xlog_in_core *ic_next; 373153323Srodrigc struct xlog_in_core *ic_prev; 374153323Srodrigc struct xfs_buf *ic_bp; 375153323Srodrigc struct log *ic_log; 376153323Srodrigc xfs_log_callback_t *ic_callback; 377153323Srodrigc xfs_log_callback_t **ic_callback_tail; 378153323Srodrigc#ifdef XFS_LOG_TRACE 379153323Srodrigc struct ktrace *ic_trace; 380153323Srodrigc#endif 381153323Srodrigc int ic_size; 382153323Srodrigc int ic_offset; 383153323Srodrigc int ic_refcnt; 384153323Srodrigc int ic_bwritecnt; 385153323Srodrigc ushort_t ic_state; 386153323Srodrigc char *ic_datap; /* pointer to iclog data */ 387153323Srodrigc} xlog_iclog_fields_t; 388153323Srodrigc 389153323Srodrigctypedef union xlog_in_core2 { 390153323Srodrigc xlog_rec_header_t hic_header; 391153323Srodrigc xlog_rec_ext_header_t hic_xheader; 392153323Srodrigc char hic_sector[XLOG_HEADER_SIZE]; 393153323Srodrigc} xlog_in_core_2_t; 394153323Srodrigc 395153323Srodrigctypedef struct xlog_in_core { 396153323Srodrigc xlog_iclog_fields_t hic_fields; 397153323Srodrigc xlog_in_core_2_t *hic_data; 398153323Srodrigc} xlog_in_core_t; 399153323Srodrigc 400153323Srodrigc/* 401153323Srodrigc * Defines to save our code from this glop. 402153323Srodrigc */ 403153323Srodrigc#define ic_forcesema hic_fields.ic_forcesema 404153323Srodrigc#define ic_writesema hic_fields.ic_writesema 405153323Srodrigc#define ic_next hic_fields.ic_next 406153323Srodrigc#define ic_prev hic_fields.ic_prev 407153323Srodrigc#define ic_bp hic_fields.ic_bp 408153323Srodrigc#define ic_log hic_fields.ic_log 409153323Srodrigc#define ic_callback hic_fields.ic_callback 410153323Srodrigc#define ic_callback_tail hic_fields.ic_callback_tail 411153323Srodrigc#define ic_trace hic_fields.ic_trace 412153323Srodrigc#define ic_size hic_fields.ic_size 413153323Srodrigc#define ic_offset hic_fields.ic_offset 414153323Srodrigc#define ic_refcnt hic_fields.ic_refcnt 415153323Srodrigc#define ic_bwritecnt hic_fields.ic_bwritecnt 416153323Srodrigc#define ic_state hic_fields.ic_state 417153323Srodrigc#define ic_datap hic_fields.ic_datap 418153323Srodrigc#define ic_header hic_data->hic_header 419153323Srodrigc 420153323Srodrigc/* 421153323Srodrigc * The reservation head lsn is not made up of a cycle number and block number. 422153323Srodrigc * Instead, it uses a cycle number and byte number. Logs don't expect to 423153323Srodrigc * overflow 31 bits worth of byte offset, so using a byte number will mean 424153323Srodrigc * that round off problems won't occur when releasing partial reservations. 425153323Srodrigc */ 426153323Srodrigctypedef struct log { 427153323Srodrigc /* The following block of fields are changed while holding icloglock */ 428153323Srodrigc sema_t l_flushsema; /* iclog flushing semaphore */ 429153323Srodrigc int l_flushcnt; /* # of procs waiting on this 430153323Srodrigc * sema */ 431153323Srodrigc int l_ticket_cnt; /* free ticket count */ 432153323Srodrigc int l_ticket_tcnt; /* total ticket count */ 433153323Srodrigc int l_covered_state;/* state of "covering disk 434153323Srodrigc * log entries" */ 435153323Srodrigc xlog_ticket_t *l_freelist; /* free list of tickets */ 436153323Srodrigc xlog_ticket_t *l_unmount_free;/* kmem_free these addresses */ 437153323Srodrigc xlog_ticket_t *l_tail; /* free list of tickets */ 438153323Srodrigc xlog_in_core_t *l_iclog; /* head log queue */ 439153323Srodrigc lock_t l_icloglock; /* grab to change iclog state */ 440153323Srodrigc xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed 441153323Srodrigc * buffers */ 442153323Srodrigc xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */ 443153323Srodrigc struct xfs_mount *l_mp; /* mount point */ 444153323Srodrigc struct xfs_buf *l_xbuf; /* extra buffer for log 445153323Srodrigc * wrapping */ 446153323Srodrigc struct xfs_buftarg *l_targ; /* buftarg of log */ 447153323Srodrigc xfs_daddr_t l_logBBstart; /* start block of log */ 448153323Srodrigc int l_logsize; /* size of log in bytes */ 449153323Srodrigc int l_logBBsize; /* size of log in BB chunks */ 450153323Srodrigc int l_curr_cycle; /* Cycle number of log writes */ 451153323Srodrigc int l_prev_cycle; /* Cycle number before last 452153323Srodrigc * block increment */ 453153323Srodrigc int l_curr_block; /* current logical log block */ 454153323Srodrigc int l_prev_block; /* previous logical log block */ 455153323Srodrigc int l_iclog_size; /* size of log in bytes */ 456153323Srodrigc int l_iclog_size_log; /* log power size of log */ 457153323Srodrigc int l_iclog_bufs; /* number of iclog buffers */ 458153323Srodrigc 459153323Srodrigc /* The following field are used for debugging; need to hold icloglock */ 460153323Srodrigc char *l_iclog_bak[XLOG_MAX_ICLOGS]; 461153323Srodrigc 462153323Srodrigc /* The following block of fields are changed while holding grant_lock */ 463153323Srodrigc lock_t l_grant_lock; 464153323Srodrigc xlog_ticket_t *l_reserve_headq; 465153323Srodrigc xlog_ticket_t *l_write_headq; 466153323Srodrigc int l_grant_reserve_cycle; 467153323Srodrigc int l_grant_reserve_bytes; 468153323Srodrigc int l_grant_write_cycle; 469153323Srodrigc int l_grant_write_bytes; 470153323Srodrigc 471153323Srodrigc /* The following fields don't need locking */ 472153323Srodrigc#ifdef XFS_LOG_TRACE 473153323Srodrigc struct ktrace *l_trace; 474153323Srodrigc struct ktrace *l_grant_trace; 475153323Srodrigc#endif 476153323Srodrigc uint l_flags; 477153323Srodrigc uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */ 478153323Srodrigc struct xfs_buf_cancel **l_buf_cancel_table; 479153323Srodrigc int l_iclog_hsize; /* size of iclog header */ 480153323Srodrigc int l_iclog_heads; /* # of iclog header sectors */ 481153323Srodrigc uint l_sectbb_log; /* log2 of sector size in BBs */ 482153323Srodrigc uint l_sectbb_mask; /* sector size (in BBs) 483153323Srodrigc * alignment mask */ 484153323Srodrigc} xlog_t; 485153323Srodrigc 486159451Srodrigc#define XLOG_FORCED_SHUTDOWN(log) ((log)->l_flags & XLOG_IO_ERROR) 487153323Srodrigc 488159451Srodrigc 489153323Srodrigc/* common routines */ 490153323Srodrigcextern xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp); 491153323Srodrigcextern int xlog_find_tail(xlog_t *log, 492153323Srodrigc xfs_daddr_t *head_blk, 493159451Srodrigc xfs_daddr_t *tail_blk); 494159451Srodrigcextern int xlog_recover(xlog_t *log); 495153323Srodrigcextern int xlog_recover_finish(xlog_t *log, int mfsi_flags); 496159451Srodrigcextern void xlog_pack_data(xlog_t *log, xlog_in_core_t *iclog, int); 497153323Srodrigcextern void xlog_recover_process_iunlinks(xlog_t *log); 498153323Srodrigc 499153323Srodrigcextern struct xfs_buf *xlog_get_bp(xlog_t *, int); 500153323Srodrigcextern void xlog_put_bp(struct xfs_buf *); 501153323Srodrigcextern int xlog_bread(xlog_t *, xfs_daddr_t, int, struct xfs_buf *); 502153323Srodrigc 503159451Srodrigc/* iclog tracing */ 504153323Srodrigc#define XLOG_TRACE_GRAB_FLUSH 1 505153323Srodrigc#define XLOG_TRACE_REL_FLUSH 2 506153323Srodrigc#define XLOG_TRACE_SLEEP_FLUSH 3 507153323Srodrigc#define XLOG_TRACE_WAKE_FLUSH 4 508153323Srodrigc 509153323Srodrigc#endif /* __KERNEL__ */ 510153323Srodrigc 511153323Srodrigc#endif /* __XFS_LOG_PRIV_H__ */ 512