diff options
Diffstat (limited to 'bdb/dbinc/log.h')
| -rw-r--r-- | bdb/dbinc/log.h | 273 |
1 files changed, 0 insertions, 273 deletions
diff --git a/bdb/dbinc/log.h b/bdb/dbinc/log.h deleted file mode 100644 index 434994528ea..00000000000 --- a/bdb/dbinc/log.h +++ /dev/null @@ -1,273 +0,0 @@ -/*- - * See the file LICENSE for redistribution information. - * - * Copyright (c) 1996-2002 - * Sleepycat Software. All rights reserved. - * - * $Id: log.h,v 11.60 2002/08/06 06:37:08 bostic Exp $ - */ - -#ifndef _LOG_H_ -#define _LOG_H_ - -struct __db_log; typedef struct __db_log DB_LOG; -struct __hdr; typedef struct __hdr HDR; -struct __log; typedef struct __log LOG; -struct __log_persist; typedef struct __log_persist LOGP; - -#define LFPREFIX "log." /* Log file name prefix. */ -#define LFNAME "log.%010d" /* Log file name template. */ -#define LFNAME_V1 "log.%05d" /* Log file name template, rev 1. */ - -#define LG_MAX_DEFAULT (10 * MEGABYTE) /* 10 MB. */ -#define LG_BSIZE_DEFAULT (32 * 1024) /* 32 KB. */ -#define LG_BASE_REGION_SIZE (60 * 1024) /* 60 KB. */ - -/* - * The per-process table that maps log file-id's to DB structures. - */ -typedef struct __db_entry { - DB *dbp; /* Open dbp for this file id. */ - int deleted; /* File was not found during open. */ -} DB_ENTRY; - -/* - * DB_LOG - * Per-process log structure. - */ -struct __db_log { -/* - * These fields need to be protected for multi-threaded support. - * - * !!! - * As this structure is allocated in per-process memory, the mutex may need - * to be stored elsewhere on architectures unable to support mutexes in heap - * memory, e.g., HP/UX 9. - */ - DB_MUTEX *mutexp; /* Mutex for thread protection. */ - - DB_ENTRY *dbentry; /* Recovery file-id mapping. */ -#define DB_GROW_SIZE 64 - int32_t dbentry_cnt; /* Entries. Grows by DB_GROW_SIZE. */ - -/* - * These fields are always accessed while the region lock is held, so they do - * not have to be protected by the thread lock as well, OR, they are only used - * when threads are not being used, i.e. most cursor operations are disallowed - * on threaded logs. - */ - u_int32_t lfname; /* Log file "name". */ - DB_FH lfh; /* Log file handle. */ - - u_int8_t *bufp; /* Region buffer. */ - -/* These fields are not protected. */ - DB_ENV *dbenv; /* Reference to error information. */ - REGINFO reginfo; /* Region information. */ - -#define DBLOG_RECOVER 0x01 /* We are in recovery. */ -#define DBLOG_FORCE_OPEN 0x02 /* Force the DB open even if it appears - * to be deleted. - */ - u_int32_t flags; -}; - -/* - * HDR -- - * Log record header. - */ -struct __hdr { - u_int32_t prev; /* Previous offset. */ - u_int32_t len; /* Current length. */ - u_int8_t chksum[DB_MAC_KEY]; /* Current checksum. */ - u_int8_t iv[DB_IV_BYTES]; /* IV */ - u_int32_t orig_size; /* Original size of log record */ - /* !!! - 'size' is not written to log, must be last in hdr */ - size_t size; /* Size of header to use */ -}; - -/* - * We use HDR internally, and then when we write out, we write out - * prev, len, and then a 4-byte checksum if normal operation or - * a crypto-checksum and IV and original size if running in crypto - * mode. We must store the original size in case we pad. Set the - * size when we set up the header. We compute a DB_MAC_KEY size - * checksum regardless, but we can safely just use the first 4 bytes. - */ -#define HDR_NORMAL_SZ 12 -#define HDR_CRYPTO_SZ 12 + DB_MAC_KEY + DB_IV_BYTES - -struct __log_persist { - u_int32_t magic; /* DB_LOGMAGIC */ - u_int32_t version; /* DB_LOGVERSION */ - - u_int32_t log_size; /* Log file size. */ - u_int32_t mode; /* Log file mode. */ -}; - -/* - * LOG -- - * Shared log region. One of these is allocated in shared memory, - * and describes the log. - */ -struct __log { - /* - * Due to alignment constraints on some architectures (e.g. HP-UX), - * DB_MUTEXes must be the first element of shalloced structures, - * and as a corollary there can be only one per structure. Thus, - * flush_mutex_off points to a mutex in a separately-allocated chunk. - */ - DB_MUTEX fq_mutex; /* Mutex guarding file name list. */ - - LOGP persist; /* Persistent information. */ - - SH_TAILQ_HEAD(__fq1) fq; /* List of file names. */ - int32_t fid_max; /* Max fid allocated. */ - roff_t free_fid_stack; /* Stack of free file ids. */ - int free_fids; /* Height of free fid stack. */ - int free_fids_alloced; /* Number of free fid slots alloc'ed. */ - - /* - * The lsn LSN is the file offset that we're about to write and which - * we will return to the user. - */ - DB_LSN lsn; /* LSN at current file offset. */ - - /* - * The f_lsn LSN is the LSN (returned to the user) that "owns" the - * first byte of the buffer. If the record associated with the LSN - * spans buffers, it may not reflect the physical file location of - * the first byte of the buffer. - */ - DB_LSN f_lsn; /* LSN of first byte in the buffer. */ - size_t b_off; /* Current offset in the buffer. */ - u_int32_t w_off; /* Current write offset in the file. */ - u_int32_t len; /* Length of the last record. */ - - /* - * The s_lsn LSN is the last LSN that we know is on disk, not just - * written, but synced. This field is protected by the flush mutex - * rather than by the region mutex. - */ - int in_flush; /* Log flush in progress. */ - roff_t flush_mutex_off; /* Mutex guarding flushing. */ - DB_LSN s_lsn; /* LSN of the last sync. */ - - DB_LOG_STAT stat; /* Log statistics. */ - - /* - * The waiting_lsn is used by the replication system. It is the - * first LSN that we are holding without putting in the log, because - * we received one or more log records out of order. Associated with - * the waiting_lsn is the number of log records that we still have to - * receive before we decide that we should request it again. - */ - DB_LSN waiting_lsn; /* First log record after a gap. */ - DB_LSN verify_lsn; /* LSN we are waiting to verify. */ - u_int32_t wait_recs; /* Records to wait before requesting. */ - u_int32_t rcvd_recs; /* Records received while waiting. */ - - /* - * The ready_lsn is also used by the replication system. It is the - * next LSN we expect to receive. It's normally equal to "lsn", - * except at the beginning of a log file, at which point it's set - * to the LSN of the first record of the new file (after the - * header), rather than to 0. - */ - DB_LSN ready_lsn; - - /* - * During initialization, the log system walks forward through the - * last log file to find its end. If it runs into a checkpoint - * while it's doing so, it caches it here so that the transaction - * system doesn't need to walk through the file again on its - * initialization. - */ - DB_LSN cached_ckp_lsn; - - roff_t buffer_off; /* Log buffer offset in the region. */ - u_int32_t buffer_size; /* Log buffer size. */ - - u_int32_t log_size; /* Log file's size. */ - u_int32_t log_nsize; /* Next log file's size. */ - - u_int32_t ncommit; /* Number of txns waiting to commit. */ - - DB_LSN t_lsn; /* LSN of first commit */ - SH_TAILQ_HEAD(__commit) commits;/* list of txns waiting to commit. */ - SH_TAILQ_HEAD(__free) free_commits;/* free list of commit structs. */ - -#ifdef HAVE_MUTEX_SYSTEM_RESOURCES -#define LG_MAINT_SIZE (sizeof(roff_t) * DB_MAX_HANDLES) - - roff_t maint_off; /* offset of region maintenance info */ -#endif -}; - -/* - * __db_commit structure -- - * One of these is allocated for each transaction waiting - * to commit. - */ -struct __db_commit { - DB_MUTEX mutex; /* Mutex for txn to wait on. */ - DB_LSN lsn; /* LSN of commit record. */ - SH_TAILQ_ENTRY links; /* Either on free or waiting list. */ - -#define DB_COMMIT_FLUSH 0x0001 /* Flush the log when you wake up. */ - u_int32_t flags; -}; - -/* - * FNAME -- - * File name and id. - */ -struct __fname { - SH_TAILQ_ENTRY q; /* File name queue. */ - - int32_t id; /* Logging file id. */ - DBTYPE s_type; /* Saved DB type. */ - - roff_t name_off; /* Name offset. */ - db_pgno_t meta_pgno; /* Page number of the meta page. */ - u_int8_t ufid[DB_FILE_ID_LEN]; /* Unique file id. */ - - u_int32_t create_txnid; /* - * Txn ID of the DB create, stored so - * we can log it at register time. - */ -}; - -/* File open/close register log record opcodes. */ -#define LOG_CHECKPOINT 1 /* Checkpoint: file name/id dump. */ -#define LOG_CLOSE 2 /* File close. */ -#define LOG_OPEN 3 /* File open. */ -#define LOG_RCLOSE 4 /* File close after recovery. */ - -#define CHECK_LSN(redo, cmp, lsn, prev) \ - DB_ASSERT(!DB_REDO(redo) || \ - (cmp) >= 0 || IS_NOT_LOGGED_LSN(*lsn)); \ - if (DB_REDO(redo) && (cmp) < 0 && !IS_NOT_LOGGED_LSN(*(lsn))) { \ - __db_err(dbenv, \ - "Log sequence error: page LSN %lu %lu; previous LSN %lu %lu", \ - (u_long)(lsn)->file, (u_long)(lsn)->offset, \ - (u_long)(prev)->file, (u_long)(prev)->offset); \ - goto out; \ - } - -/* - * Status codes indicating the validity of a log file examined by - * __log_valid(). - */ -typedef enum { - DB_LV_INCOMPLETE, - DB_LV_NONEXISTENT, - DB_LV_NORMAL, - DB_LV_OLD_READABLE, - DB_LV_OLD_UNREADABLE -} logfile_validity; - -#include "dbinc_auto/dbreg_auto.h" -#include "dbinc_auto/dbreg_ext.h" -#include "dbinc_auto/log_ext.h" -#endif /* !_LOG_H_ */ |