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101 lines
2.1 KiB
101 lines
2.1 KiB
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997, 1998, 1999
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)db_upgrade.c 11.3 (Sleepycat) 10/20/99";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#endif
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#include "db_int.h"
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#include "db_page.h"
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#include "db_swap.h"
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#include "btree.h"
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#include "hash.h"
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#include "qam.h"
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/*
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* CDB___db_upgrade --
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* Upgrade an existing database.
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*
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* PUBLIC: int CDB___db_upgrade __P((DB *, const char *, u_int32_t));
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*/
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int
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CDB___db_upgrade(dbp, fname, flags)
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DB *dbp;
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const char *fname;
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u_int32_t flags;
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{
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DB_ENV *dbenv;
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DB_FH fh;
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ssize_t nr;
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int ret, swapped, t_ret;
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char *real_name, mbuf[256];
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dbenv = dbp->dbenv;
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/* Validate arguments. */
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if ((ret = CDB___db_fchk(dbenv, "DB->upgrade", flags, 0)) != 0)
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return (ret);
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/* Get the real backing file name. */
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if ((ret = CDB___db_appname(dbenv,
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DB_APP_DATA, NULL, fname, 0, NULL, &real_name)) != 0)
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return (ret);
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/* Open the file. */
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if ((ret = CDB___os_open(real_name, 0, 0, &fh)) != 0) {
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CDB___db_err(dbenv, "%s: %s", fname, CDB_db_strerror(ret));
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return (ret);
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}
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/*
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* Read the metadata page. We read 256 bytes, which is larger than
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* any access method's metadata page and smaller than any disk sector.
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*/
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if ((ret = CDB___os_read(&fh, mbuf, sizeof(mbuf), &nr)) != 0)
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goto err;
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swapped = 0;
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retry: switch (((DBMETA *)mbuf)->magic) {
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case DB_BTREEMAGIC:
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if ((ret =
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CDB___bam_upgrade(dbp, swapped, real_name, &fh, mbuf)) != 0)
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goto err;
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break;
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case DB_HASHMAGIC:
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if ((ret =
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CDB___ham_upgrade(dbp, swapped, real_name, &fh, mbuf)) != 0)
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goto err;
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break;
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case DB_QAMMAGIC:
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break;
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default:
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if (swapped++) {
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CDB___db_err(dbenv, "%s: unrecognized file type", fname);
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ret = EINVAL;
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goto err;
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}
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M_32_SWAP(((DBMETA *)mbuf)->magic);
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M_32_SWAP(((DBMETA *)mbuf)->version);
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goto retry;
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}
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err: if ((t_ret = CDB___os_closehandle(&fh)) != 0 && ret == 0)
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ret = t_ret;
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CDB___os_freestr(real_name);
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return (ret);
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}
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