diff options
Diffstat (limited to 'storage/bdb/db/db_upg.c')
| -rw-r--r-- | storage/bdb/db/db_upg.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/storage/bdb/db/db_upg.c b/storage/bdb/db/db_upg.c new file mode 100644 index 00000000000..c0eb72f3713 --- /dev/null +++ b/storage/bdb/db/db_upg.c @@ -0,0 +1,341 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996-2002 + * Sleepycat Software. All rights reserved. + */ + +#include "db_config.h" + +#ifndef lint +static const char revid[] = "$Id: db_upg.c,v 11.29 2002/03/27 18:59:04 krinsky Exp $"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> + +#include <string.h> +#endif + +#include "db_int.h" +#include "dbinc/db_page.h" +#include "dbinc/db_swap.h" +#include "dbinc/btree.h" +#include "dbinc/hash.h" +#include "dbinc/qam.h" + +static int (* const func_31_list[P_PAGETYPE_MAX]) + __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *)) = { + NULL, /* P_INVALID */ + NULL, /* __P_DUPLICATE */ + __ham_31_hash, /* P_HASH */ + NULL, /* P_IBTREE */ + NULL, /* P_IRECNO */ + __bam_31_lbtree, /* P_LBTREE */ + NULL, /* P_LRECNO */ + NULL, /* P_OVERFLOW */ + __ham_31_hashmeta, /* P_HASHMETA */ + __bam_31_btreemeta, /* P_BTREEMETA */ +}; + +static int __db_page_pass __P((DB *, char *, u_int32_t, int (* const []) + (DB *, char *, u_int32_t, DB_FH *, PAGE *, int *), DB_FH *)); + +/* + * __db_upgrade -- + * Upgrade an existing database. + * + * PUBLIC: int __db_upgrade __P((DB *, const char *, u_int32_t)); + */ +int +__db_upgrade(dbp, fname, flags) + DB *dbp; + const char *fname; + u_int32_t flags; +{ + DB_ENV *dbenv; + DB_FH fh; + size_t n; + int ret, t_ret; + u_int8_t mbuf[256]; + char *real_name; + + dbenv = dbp->dbenv; + + /* Validate arguments. */ + if ((ret = __db_fchk(dbenv, "DB->upgrade", flags, DB_DUPSORT)) != 0) + return (ret); + + /* Get the real backing file name. */ + if ((ret = __db_appname(dbenv, + DB_APP_DATA, fname, 0, NULL, &real_name)) != 0) + return (ret); + + /* Open the file. */ + if ((ret = __os_open(dbenv, real_name, 0, 0, &fh)) != 0) { + __db_err(dbenv, "%s: %s", real_name, db_strerror(ret)); + return (ret); + } + + /* Initialize the feedback. */ + if (dbp->db_feedback != NULL) + dbp->db_feedback(dbp, DB_UPGRADE, 0); + + /* + * Read the metadata page. We read 256 bytes, which is larger than + * any access method's metadata page and smaller than any disk sector. + */ + if ((ret = __os_read(dbenv, &fh, mbuf, sizeof(mbuf), &n)) != 0) + goto err; + + switch (((DBMETA *)mbuf)->magic) { + case DB_BTREEMAGIC: + switch (((DBMETA *)mbuf)->version) { + case 6: + /* + * Before V7 not all pages had page types, so we do the + * single meta-data page by hand. + */ + if ((ret = + __bam_30_btreemeta(dbp, real_name, mbuf)) != 0) + goto err; + if ((ret = __os_seek(dbenv, + &fh, 0, 0, 0, 0, DB_OS_SEEK_SET)) != 0) + goto err; + if ((ret = __os_write(dbenv, &fh, mbuf, 256, &n)) != 0) + goto err; + /* FALLTHROUGH */ + case 7: + /* + * We need the page size to do more. Rip it out of + * the meta-data page. + */ + memcpy(&dbp->pgsize, mbuf + 20, sizeof(u_int32_t)); + + if ((ret = __db_page_pass( + dbp, real_name, flags, func_31_list, &fh)) != 0) + goto err; + /* FALLTHROUGH */ + case 8: + case 9: + break; + default: + __db_err(dbenv, "%s: unsupported btree version: %lu", + real_name, (u_long)((DBMETA *)mbuf)->version); + ret = DB_OLD_VERSION; + goto err; + } + break; + case DB_HASHMAGIC: + switch (((DBMETA *)mbuf)->version) { + case 4: + case 5: + /* + * Before V6 not all pages had page types, so we do the + * single meta-data page by hand. + */ + if ((ret = + __ham_30_hashmeta(dbp, real_name, mbuf)) != 0) + goto err; + if ((ret = __os_seek(dbenv, + &fh, 0, 0, 0, 0, DB_OS_SEEK_SET)) != 0) + goto err; + if ((ret = __os_write(dbenv, &fh, mbuf, 256, &n)) != 0) + goto err; + + /* + * Before V6, we created hash pages one by one as they + * were needed, using hashhdr.ovfl_point to reserve + * a block of page numbers for them. A consequence + * of this was that, if no overflow pages had been + * created, the current doubling might extend past + * the end of the database file. + * + * In DB 3.X, we now create all the hash pages + * belonging to a doubling atomicly; it's not + * safe to just save them for later, because when + * we create an overflow page we'll just create + * a new last page (whatever that may be). Grow + * the database to the end of the current doubling. + */ + if ((ret = + __ham_30_sizefix(dbp, &fh, real_name, mbuf)) != 0) + goto err; + /* FALLTHROUGH */ + case 6: + /* + * We need the page size to do more. Rip it out of + * the meta-data page. + */ + memcpy(&dbp->pgsize, mbuf + 20, sizeof(u_int32_t)); + + if ((ret = __db_page_pass( + dbp, real_name, flags, func_31_list, &fh)) != 0) + goto err; + /* FALLTHROUGH */ + case 7: + case 8: + break; + default: + __db_err(dbenv, "%s: unsupported hash version: %lu", + real_name, (u_long)((DBMETA *)mbuf)->version); + ret = DB_OLD_VERSION; + goto err; + } + break; + case DB_QAMMAGIC: + switch (((DBMETA *)mbuf)->version) { + case 1: + /* + * If we're in a Queue database, the only page that + * needs upgrading is the meta-database page, don't + * bother with a full pass. + */ + if ((ret = __qam_31_qammeta(dbp, real_name, mbuf)) != 0) + return (ret); + /* FALLTHROUGH */ + case 2: + if ((ret = __qam_32_qammeta(dbp, real_name, mbuf)) != 0) + return (ret); + if ((ret = __os_seek(dbenv, + &fh, 0, 0, 0, 0, DB_OS_SEEK_SET)) != 0) + goto err; + if ((ret = __os_write(dbenv, &fh, mbuf, 256, &n)) != 0) + goto err; + /* FALLTHROUGH */ + case 3: + case 4: + break; + default: + __db_err(dbenv, "%s: unsupported queue version: %lu", + real_name, (u_long)((DBMETA *)mbuf)->version); + ret = DB_OLD_VERSION; + goto err; + } + break; + default: + M_32_SWAP(((DBMETA *)mbuf)->magic); + switch (((DBMETA *)mbuf)->magic) { + case DB_BTREEMAGIC: + case DB_HASHMAGIC: + case DB_QAMMAGIC: + __db_err(dbenv, + "%s: DB->upgrade only supported on native byte-order systems", + real_name); + break; + default: + __db_err(dbenv, + "%s: unrecognized file type", real_name); + break; + } + ret = EINVAL; + goto err; + } + + ret = __os_fsync(dbenv, &fh); + +err: if ((t_ret = __os_closehandle(dbenv, &fh)) != 0 && ret == 0) + ret = t_ret; + __os_free(dbenv, real_name); + + /* We're done. */ + if (dbp->db_feedback != NULL) + dbp->db_feedback(dbp, DB_UPGRADE, 100); + + return (ret); +} + +/* + * __db_page_pass -- + * Walk the pages of the database, upgrading whatever needs it. + */ +static int +__db_page_pass(dbp, real_name, flags, fl, fhp) + DB *dbp; + char *real_name; + u_int32_t flags; + int (* const fl[P_PAGETYPE_MAX]) + __P((DB *, char *, u_int32_t, DB_FH *, PAGE *, int *)); + DB_FH *fhp; +{ + DB_ENV *dbenv; + PAGE *page; + db_pgno_t i, pgno_last; + size_t n; + int dirty, ret; + + dbenv = dbp->dbenv; + + /* Determine the last page of the file. */ + if ((ret = __db_lastpgno(dbp, real_name, fhp, &pgno_last)) != 0) + return (ret); + + /* Allocate memory for a single page. */ + if ((ret = __os_malloc(dbenv, dbp->pgsize, &page)) != 0) + return (ret); + + /* Walk the file, calling the underlying conversion functions. */ + for (i = 0; i < pgno_last; ++i) { + if (dbp->db_feedback != NULL) + dbp->db_feedback(dbp, DB_UPGRADE, (i * 100)/pgno_last); + if ((ret = __os_seek(dbenv, + fhp, dbp->pgsize, i, 0, 0, DB_OS_SEEK_SET)) != 0) + break; + if ((ret = __os_read(dbenv, fhp, page, dbp->pgsize, &n)) != 0) + break; + dirty = 0; + if (fl[TYPE(page)] != NULL && (ret = fl[TYPE(page)] + (dbp, real_name, flags, fhp, page, &dirty)) != 0) + break; + if (dirty) { + if ((ret = __os_seek(dbenv, + fhp, dbp->pgsize, i, 0, 0, DB_OS_SEEK_SET)) != 0) + break; + if ((ret = __os_write(dbenv, + fhp, page, dbp->pgsize, &n)) != 0) + break; + } + } + + __os_free(dbp->dbenv, page); + return (ret); +} + +/* + * __db_lastpgno -- + * Return the current last page number of the file. + * + * PUBLIC: int __db_lastpgno __P((DB *, char *, DB_FH *, db_pgno_t *)); + */ +int +__db_lastpgno(dbp, real_name, fhp, pgno_lastp) + DB *dbp; + char *real_name; + DB_FH *fhp; + db_pgno_t *pgno_lastp; +{ + DB_ENV *dbenv; + db_pgno_t pgno_last; + u_int32_t mbytes, bytes; + int ret; + + dbenv = dbp->dbenv; + + if ((ret = __os_ioinfo(dbenv, + real_name, fhp, &mbytes, &bytes, NULL)) != 0) { + __db_err(dbenv, "%s: %s", real_name, db_strerror(ret)); + return (ret); + } + + /* Page sizes have to be a power-of-two. */ + if (bytes % dbp->pgsize != 0) { + __db_err(dbenv, + "%s: file size not a multiple of the pagesize", real_name); + return (EINVAL); + } + pgno_last = mbytes * (MEGABYTE / dbp->pgsize); + pgno_last += bytes / dbp->pgsize; + + *pgno_lastp = pgno_last; + return (0); +} |