diff options
author | unknown <ram@mysql.r18.ru> | 2002-10-30 15:57:05 +0400 |
---|---|---|
committer | unknown <ram@mysql.r18.ru> | 2002-10-30 15:57:05 +0400 |
commit | 155e78f014de1a2e259ae5119f4621fbb210a784 (patch) | |
tree | 6881a3cca88bea0bb9eeffd5aae34be437152786 /bdb/qam/qam_open.c | |
parent | b8798d25ab71436bf690ee8ae48285a655c5487e (diff) | |
download | mariadb-git-155e78f014de1a2e259ae5119f4621fbb210a784.tar.gz |
BDB 4.1.24
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Diffstat (limited to 'bdb/qam/qam_open.c')
-rw-r--r-- | bdb/qam/qam_open.c | 309 |
1 files changed, 186 insertions, 123 deletions
diff --git a/bdb/qam/qam_open.c b/bdb/qam/qam_open.c index 73346439fd6..efe4dfc540e 100644 --- a/bdb/qam/qam_open.c +++ b/bdb/qam/qam_open.c @@ -1,14 +1,14 @@ /*- * See the file LICENSE for redistribution information. * - * Copyright (c) 1999, 2000 + * Copyright (c) 1999-2002 * Sleepycat Software. All rights reserved. */ #include "db_config.h" #ifndef lint -static const char revid[] = "$Id: qam_open.c,v 11.31 2000/12/20 17:59:29 ubell Exp $"; +static const char revid[] = "$Id: qam_open.c,v 11.55 2002/09/04 19:06:45 margo Exp $"; #endif /* not lint */ #ifndef NO_SYSTEM_INCLUDES @@ -18,174 +18,95 @@ static const char revid[] = "$Id: qam_open.c,v 11.31 2000/12/20 17:59:29 ubell E #endif #include "db_int.h" -#include "db_page.h" -#include "db_shash.h" -#include "db_swap.h" -#include "db_am.h" -#include "lock.h" -#include "qam.h" +#include "dbinc/crypto.h" +#include "dbinc/db_page.h" +#include "dbinc/db_shash.h" +#include "dbinc/db_swap.h" +#include "dbinc/db_am.h" +#include "dbinc/lock.h" +#include "dbinc/qam.h" +#include "dbinc/fop.h" + +static int __qam_init_meta __P((DB *, QMETA *)); /* * __qam_open * - * PUBLIC: int __qam_open __P((DB *, const char *, db_pgno_t, int, u_int32_t)); + * PUBLIC: int __qam_open __P((DB *, + * PUBLIC: DB_TXN *, const char *, db_pgno_t, int, u_int32_t)); */ int -__qam_open(dbp, name, base_pgno, mode, flags) +__qam_open(dbp, txn, name, base_pgno, mode, flags) DB *dbp; + DB_TXN *txn; const char *name; db_pgno_t base_pgno; int mode; u_int32_t flags; { - QUEUE *t; DBC *dbc; + DB_ENV *dbenv; DB_LOCK metalock; - DB_LSN orig_lsn; + DB_MPOOLFILE *mpf; QMETA *qmeta; - int locked; + QUEUE *t; int ret, t_ret; - ret = 0; - locked = 0; + dbenv = dbp->dbenv; + mpf = dbp->mpf; t = dbp->q_internal; + ret = 0; + qmeta = NULL; - if (name == NULL && t->page_ext != 0) { - __db_err(dbp->dbenv, - "Extent size may not be specified for in-memory queue database."); - return (EINVAL); - } /* Initialize the remaining fields/methods of the DB. */ - dbp->del = __qam_delete; - dbp->put = __qam_put; dbp->stat = __qam_stat; dbp->sync = __qam_sync; dbp->db_am_remove = __qam_remove; dbp->db_am_rename = __qam_rename; - metalock.off = LOCK_INVALID; - /* * Get a cursor. If DB_CREATE is specified, we may be creating * pages, and to do that safely in CDB we need a write cursor. * In STD_LOCKING mode, we'll synchronize using the meta page * lock instead. */ - if ((ret = dbp->cursor(dbp, dbp->open_txn, - &dbc, LF_ISSET(DB_CREATE) && CDB_LOCKING(dbp->dbenv) ? - DB_WRITECURSOR : 0)) != 0) + if ((ret = dbp->cursor(dbp, txn, &dbc, + LF_ISSET(DB_CREATE) && CDB_LOCKING(dbenv) ? DB_WRITECURSOR : 0)) + != 0) return (ret); - /* Get, and optionally create the metadata page. */ + /* + * Get the meta data page. It must exist, because creates of + * files/databases come in through the __qam_new_file interface + * and queue doesn't support subdatabases. + */ if ((ret = __db_lget(dbc, 0, base_pgno, DB_LOCK_READ, 0, &metalock)) != 0) goto err; - if ((ret = memp_fget( - dbp->mpf, &base_pgno, DB_MPOOL_CREATE, (PAGE **)&qmeta)) != 0) + if ((ret = + mpf->get(mpf, &base_pgno, 0, (PAGE **)&qmeta)) != 0) goto err; - /* - * If the magic number is correct, we're not creating the tree. - * Correct any fields that may not be right. Note, all of the - * local flags were set by DB->open. - */ -again: if (qmeta->dbmeta.magic == DB_QAMMAGIC) { - t->re_pad = qmeta->re_pad; - t->re_len = qmeta->re_len; - t->rec_page = qmeta->rec_page; - t->page_ext = qmeta->page_ext; - - (void)memp_fput(dbp->mpf, (PAGE *)qmeta, 0); - goto done; - } - - /* If we're doing CDB; we now have to get the write lock. */ - if (CDB_LOCKING(dbp->dbenv)) { - DB_ASSERT(LF_ISSET(DB_CREATE)); - if ((ret = lock_get(dbp->dbenv, dbc->locker, DB_LOCK_UPGRADE, - &dbc->lock_dbt, DB_LOCK_WRITE, &dbc->mylock)) != 0) - goto err; - } - - /* - * If we are doing locking, relase the read lock - * and get a write lock. We want to avoid deadlock. - */ - if (locked == 0 && STD_LOCKING(dbc)) { - if ((ret = __LPUT(dbc, metalock)) != 0) - goto err; - if ((ret = __db_lget(dbc, - 0, base_pgno, DB_LOCK_WRITE, 0, &metalock)) != 0) - goto err; - locked = 1; - goto again; - } - /* Initialize the tree structure metadata information. */ - orig_lsn = qmeta->dbmeta.lsn; - memset(qmeta, 0, sizeof(QMETA)); - ZERO_LSN(qmeta->dbmeta.lsn); - qmeta->dbmeta.pgno = base_pgno; - qmeta->dbmeta.magic = DB_QAMMAGIC; - qmeta->dbmeta.version = DB_QAMVERSION; - qmeta->dbmeta.pagesize = dbp->pgsize; - qmeta->dbmeta.type = P_QAMMETA; - qmeta->re_pad = t->re_pad; - qmeta->re_len = t->re_len; - qmeta->rec_page = CALC_QAM_RECNO_PER_PAGE(dbp); - qmeta->cur_recno = 1; - qmeta->first_recno = 1; - qmeta->page_ext = t->page_ext; - t->rec_page = qmeta->rec_page; - memcpy(qmeta->dbmeta.uid, dbp->fileid, DB_FILE_ID_LEN); - - /* Verify that we can fit at least one record per page. */ - if (QAM_RECNO_PER_PAGE(dbp) < 1) { - __db_err(dbp->dbenv, - "Record size of %lu too large for page size of %lu", - (u_long)t->re_len, (u_long)dbp->pgsize); - (void)memp_fput(dbp->mpf, (PAGE *)qmeta, 0); + /* If the magic number is incorrect, that's a fatal error. */ + if (qmeta->dbmeta.magic != DB_QAMMAGIC) { + __db_err(dbenv, "%s: unexpected file type or format", name); ret = EINVAL; goto err; } - if ((ret = __db_log_page(dbp, - name, &orig_lsn, base_pgno, (PAGE *)qmeta)) != 0) - goto err; - - /* Release the metadata page. */ - if ((ret = memp_fput(dbp->mpf, (PAGE *)qmeta, DB_MPOOL_DIRTY)) != 0) - goto err; - DB_TEST_RECOVERY(dbp, DB_TEST_POSTLOG, ret, name); - - /* - * Flush the metadata page to disk. - * - * !!! - * It's not useful to return not-yet-flushed here -- convert it to - * an error. - */ - if ((ret = memp_fsync(dbp->mpf)) == DB_INCOMPLETE) { - __db_err(dbp->dbenv, "Flush of metapage failed"); - ret = EINVAL; - } - DB_TEST_RECOVERY(dbp, DB_TEST_POSTSYNC, ret, name); - -done: t->q_meta = base_pgno; - t->q_root = base_pgno + 1; - /* Setup information needed to open extents. */ - if (t->page_ext != 0) { - t->finfo.pgcookie = &t->pgcookie; - t->finfo.fileid = NULL; - t->finfo.lsn_offset = 0; + t->page_ext = qmeta->page_ext; + if (t->page_ext != 0) { t->pginfo.db_pagesize = dbp->pgsize; - t->pginfo.needswap = F_ISSET(dbp, DB_AM_SWAP); + t->pginfo.flags = + F_ISSET(dbp, (DB_AM_CHKSUM | DB_AM_ENCRYPT | DB_AM_SWAP)); + t->pginfo.type = dbp->type; t->pgcookie.data = &t->pginfo; t->pgcookie.size = sizeof(DB_PGINFO); if ((ret = __os_strdup(dbp->dbenv, name, &t->path)) != 0) - goto err; + return (ret); t->dir = t->path; if ((t->name = __db_rpath(t->path)) == NULL) { t->name = t->path; @@ -198,8 +119,22 @@ done: t->q_meta = base_pgno; t->mode = mode; } -err: -DB_TEST_RECOVERY_LABEL + if (name == NULL && t->page_ext != 0) { + __db_err(dbenv, + "Extent size may not be specified for in-memory queue database"); + return (EINVAL); + } + + t->re_pad = qmeta->re_pad; + t->re_len = qmeta->re_len; + t->rec_page = qmeta->rec_page; + + t->q_meta = base_pgno; + t->q_root = base_pgno + 1; + +err: if (qmeta != NULL && (t_ret = mpf->put(mpf, qmeta, 0)) != 0 && ret == 0) + ret = t_ret; + /* Don't hold the meta page long term. */ (void)__LPUT(dbc, metalock); @@ -225,6 +160,7 @@ __qam_metachk(dbp, name, qmeta) int ret; dbenv = dbp->dbenv; + ret = 0; /* * At this point, all we know is that the magic number is for a Queue. @@ -241,6 +177,7 @@ __qam_metachk(dbp, name, qmeta) name, (u_long)vers); return (DB_OLD_VERSION); case 3: + case 4: break; default: __db_err(dbenv, @@ -264,5 +201,131 @@ __qam_metachk(dbp, name, qmeta) /* Copy the file's ID. */ memcpy(dbp->fileid, qmeta->dbmeta.uid, DB_FILE_ID_LEN); + /* Set up AM-specific methods that do not require an open. */ + dbp->db_am_rename = __qam_rename; + dbp->db_am_remove = __qam_remove; + + return (ret); +} + +/* + * __qam_init_meta -- + * Initialize the meta-data for a Queue database. + */ +static int +__qam_init_meta(dbp, meta) + DB *dbp; + QMETA *meta; +{ + QUEUE *t; + + t = dbp->q_internal; + + memset(meta, 0, sizeof(QMETA)); + LSN_NOT_LOGGED(meta->dbmeta.lsn); + meta->dbmeta.pgno = PGNO_BASE_MD; + meta->dbmeta.last_pgno = 0; + meta->dbmeta.magic = DB_QAMMAGIC; + meta->dbmeta.version = DB_QAMVERSION; + meta->dbmeta.pagesize = dbp->pgsize; + if (F_ISSET(dbp, DB_AM_CHKSUM)) + FLD_SET(meta->dbmeta.metaflags, DBMETA_CHKSUM); + if (F_ISSET(dbp, DB_AM_ENCRYPT)) { + meta->dbmeta.encrypt_alg = + ((DB_CIPHER *)dbp->dbenv->crypto_handle)->alg; + DB_ASSERT(meta->dbmeta.encrypt_alg != 0); + meta->crypto_magic = meta->dbmeta.magic; + } + meta->dbmeta.type = P_QAMMETA; + meta->re_pad = t->re_pad; + meta->re_len = t->re_len; + meta->rec_page = CALC_QAM_RECNO_PER_PAGE(dbp); + meta->cur_recno = 1; + meta->first_recno = 1; + meta->page_ext = t->page_ext; + t->rec_page = meta->rec_page; + memcpy(meta->dbmeta.uid, dbp->fileid, DB_FILE_ID_LEN); + + /* Verify that we can fit at least one record per page. */ + if (QAM_RECNO_PER_PAGE(dbp) < 1) { + __db_err(dbp->dbenv, + "Record size of %lu too large for page size of %lu", + (u_long)t->re_len, (u_long)dbp->pgsize); + return (EINVAL); + } + return (0); } + +/* + * __qam_new_file -- + * Create the necessary pages to begin a new queue database file. + * + * This code appears more complex than it is because of the two cases (named + * and unnamed). The way to read the code is that for each page being created, + * there are three parts: 1) a "get page" chunk (which either uses malloc'd + * memory or calls mpf->get), 2) the initialization, and 3) the "put page" + * chunk which either does a fop write or an mpf->put. + * + * PUBLIC: int __qam_new_file __P((DB *, DB_TXN *, DB_FH *, const char *)); + */ +int +__qam_new_file(dbp, txn, fhp, name) + DB *dbp; + DB_TXN *txn; + DB_FH *fhp; + const char *name; +{ + QMETA *meta; + DB_ENV *dbenv; + DB_MPOOLFILE *mpf; + DB_PGINFO pginfo; + DBT pdbt; + db_pgno_t pgno; + int ret; + void *buf; + + dbenv = dbp->dbenv; + mpf = dbp->mpf; + buf = NULL; + meta = NULL; + + /* Build meta-data page. */ + + if (name == NULL) { + pgno = PGNO_BASE_MD; + ret = mpf->get(mpf, &pgno, DB_MPOOL_CREATE, &meta); + } else { + ret = __os_calloc(dbp->dbenv, 1, dbp->pgsize, &buf); + meta = (QMETA *)buf; + } + if (ret != 0) + return (ret); + + if ((ret = __qam_init_meta(dbp, meta)) != 0) + goto err; + + if (name == NULL) + ret = mpf->put(mpf, meta, DB_MPOOL_DIRTY); + else { + pginfo.db_pagesize = dbp->pgsize; + pginfo.flags = + F_ISSET(dbp, (DB_AM_CHKSUM | DB_AM_ENCRYPT | DB_AM_SWAP)); + pginfo.type = DB_QUEUE; + pdbt.data = &pginfo; + pdbt.size = sizeof(pginfo); + if ((ret = __db_pgout(dbenv, PGNO_BASE_MD, meta, &pdbt)) != 0) + goto err; + ret = __fop_write(dbenv, + txn, name, DB_APP_DATA, fhp, 0, buf, dbp->pgsize, 1); + } + if (ret != 0) + goto err; + meta = NULL; + +err: if (name != NULL) + __os_free(dbenv, buf); + else if (meta != NULL) + (void)mpf->put(mpf, meta, 0); + return (ret); +} |