db_err.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:14k
- /*-
- * 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_err.c,v 11.80 2002/07/30 01:21:53 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_am.h"
- #include "dbinc/db_shash.h"
- #include "dbinc/lock.h"
- #include "dbinc/log.h"
- #include "dbinc/txn.h"
- /*
- * __db_fchk --
- * General flags checking routine.
- *
- * PUBLIC: int __db_fchk __P((DB_ENV *, const char *, u_int32_t, u_int32_t));
- */
- int
- __db_fchk(dbenv, name, flags, ok_flags)
- DB_ENV *dbenv;
- const char *name;
- u_int32_t flags, ok_flags;
- {
- return (LF_ISSET(~ok_flags) ? __db_ferr(dbenv, name, 0) : 0);
- }
- /*
- * __db_fcchk --
- * General combination flags checking routine.
- *
- * PUBLIC: int __db_fcchk
- * PUBLIC: __P((DB_ENV *, const char *, u_int32_t, u_int32_t, u_int32_t));
- */
- int
- __db_fcchk(dbenv, name, flags, flag1, flag2)
- DB_ENV *dbenv;
- const char *name;
- u_int32_t flags, flag1, flag2;
- {
- return (LF_ISSET(flag1) &&
- LF_ISSET(flag2) ? __db_ferr(dbenv, name, 1) : 0);
- }
- /*
- * __db_ferr --
- * Common flag errors.
- *
- * PUBLIC: int __db_ferr __P((const DB_ENV *, const char *, int));
- */
- int
- __db_ferr(dbenv, name, iscombo)
- const DB_ENV *dbenv;
- const char *name;
- int iscombo;
- {
- __db_err(dbenv, "illegal flag %sspecified to %s",
- iscombo ? "combination " : "", name);
- return (EINVAL);
- }
- /*
- * __db_pgerr --
- * Error when unable to retrieve a specified page.
- *
- * PUBLIC: void __db_pgerr __P((DB *, db_pgno_t, int));
- */
- void
- __db_pgerr(dbp, pgno, errval)
- DB *dbp;
- db_pgno_t pgno;
- int errval;
- {
- /*
- * Three things are certain:
- * Death, taxes, and lost data.
- * Guess which has occurred.
- */
- __db_err(dbp->dbenv,
- "unable to create/retrieve page %lu", (u_long)pgno);
- (void)__db_panic(dbp->dbenv, errval);
- }
- /*
- * __db_pgfmt --
- * Error when a page has the wrong format.
- *
- * PUBLIC: int __db_pgfmt __P((DB_ENV *, db_pgno_t));
- */
- int
- __db_pgfmt(dbenv, pgno)
- DB_ENV *dbenv;
- db_pgno_t pgno;
- {
- __db_err(dbenv, "page %lu: illegal page type or format", (u_long)pgno);
- return (__db_panic(dbenv, EINVAL));
- }
- /*
- * __db_eopnotsup --
- * Common operation not supported message.
- *
- * PUBLIC: int __db_eopnotsup __P((const DB_ENV *));
- */
- int
- __db_eopnotsup(dbenv)
- const DB_ENV *dbenv;
- {
- __db_err(dbenv, "operation not supported");
- #ifdef EOPNOTSUPP
- return (EOPNOTSUPP);
- #else
- return (EINVAL);
- #endif
- }
- #ifdef DIAGNOSTIC
- /*
- * __db_assert --
- * Error when an assertion fails. Only checked if #DIAGNOSTIC defined.
- *
- * PUBLIC: #ifdef DIAGNOSTIC
- * PUBLIC: void __db_assert __P((const char *, const char *, int));
- * PUBLIC: #endif
- */
- void
- __db_assert(failedexpr, file, line)
- const char *failedexpr, *file;
- int line;
- {
- (void)fprintf(stderr,
- "__db_assert: "%s" failed: file "%s", line %dn",
- failedexpr, file, line);
- (void)fflush(stderr);
- /* We want a stack trace of how this could possibly happen. */
- abort();
- /* NOTREACHED */
- }
- #endif
- /*
- * __db_panic_msg --
- * Just report that someone else paniced.
- *
- * PUBLIC: int __db_panic_msg __P((DB_ENV *));
- */
- int
- __db_panic_msg(dbenv)
- DB_ENV *dbenv;
- {
- __db_err(dbenv, "fatal region error detected; run recovery");
- return (DB_RUNRECOVERY);
- }
- /*
- * __db_panic --
- * Lock out the tree due to unrecoverable error.
- *
- * PUBLIC: int __db_panic __P((DB_ENV *, int));
- */
- int
- __db_panic(dbenv, errval)
- DB_ENV *dbenv;
- int errval;
- {
- if (dbenv != NULL) {
- PANIC_SET(dbenv, 1);
- dbenv->panic_errval = errval;
- __db_err(dbenv, "PANIC: %s", db_strerror(errval));
- if (dbenv->db_paniccall != NULL)
- dbenv->db_paniccall(dbenv, errval);
- }
- #if defined(DIAGNOSTIC) && !defined(CONFIG_TEST)
- /*
- * We want a stack trace of how this could possibly happen.
- *
- * Don't drop core if it's the test suite -- it's reasonable for the
- * test suite to check to make sure that DB_RUNRECOVERY is returned
- * under certain conditions.
- */
- abort();
- #endif
- /*
- * Chaos reigns within.
- * Reflect, repent, and reboot.
- * Order shall return.
- */
- return (DB_RUNRECOVERY);
- }
- /*
- * db_strerror --
- * ANSI C strerror(3) for DB.
- *
- * EXTERN: char *db_strerror __P((int));
- */
- char *
- db_strerror(error)
- int error;
- {
- if (error == 0)
- return ("Successful return: 0");
- if (error > 0)
- return (strerror(error));
- /*
- * !!!
- * The Tcl API requires that some of these return strings be compared
- * against strings stored in application scripts. So, any of these
- * errors that do not invariably result in a Tcl exception may not be
- * altered.
- */
- switch (error) {
- case DB_DONOTINDEX:
- return ("DB_DONOTINDEX: Secondary index callback returns null");
- case DB_KEYEMPTY:
- return ("DB_KEYEMPTY: Non-existent key/data pair");
- case DB_KEYEXIST:
- return ("DB_KEYEXIST: Key/data pair already exists");
- case DB_LOCK_DEADLOCK:
- return
- ("DB_LOCK_DEADLOCK: Locker killed to resolve a deadlock");
- case DB_LOCK_NOTGRANTED:
- return ("DB_LOCK_NOTGRANTED: Lock not granted");
- case DB_NOSERVER:
- return ("DB_NOSERVER: Fatal error, no server");
- case DB_NOSERVER_HOME:
- return ("DB_NOSERVER_HOME: Home unrecognized at server");
- case DB_NOSERVER_ID:
- return ("DB_NOSERVER_ID: Identifier unrecognized at server");
- case DB_NOTFOUND:
- return ("DB_NOTFOUND: No matching key/data pair found");
- case DB_OLD_VERSION:
- return ("DB_OLDVERSION: Database requires a version upgrade");
- case DB_PAGE_NOTFOUND:
- return ("DB_PAGE_NOTFOUND: Requested page not found");
- case DB_REP_DUPMASTER:
- return ("DB_REP_DUPMASTER: A second master site appeared");
- case DB_REP_HOLDELECTION:
- return ("DB_REP_HOLDELECTION: Need to hold an election");
- case DB_REP_NEWMASTER:
- return ("DB_REP_NEWMASTER: A new master has declared itself");
- case DB_REP_NEWSITE:
- return ("DB_REP_NEWSITE: A new site has entered the system");
- case DB_REP_OUTDATED:
- return
- ("DB_REP_OUTDATED: Insufficient logs on master to recover");
- case DB_REP_UNAVAIL:
- return ("DB_REP_UNAVAIL: Unable to elect a master");
- case DB_RUNRECOVERY:
- return ("DB_RUNRECOVERY: Fatal error, run database recovery");
- case DB_SECONDARY_BAD:
- return
- ("DB_SECONDARY_BAD: Secondary index item missing from primary");
- case DB_VERIFY_BAD:
- return ("DB_VERIFY_BAD: Database verification failed");
- default: {
- /*
- * !!!
- * Room for a 64-bit number + slop. This buffer is only used
- * if we're given an unknown error, which should never happen.
- * Note, however, we're no longer thread-safe if it does.
- */
- static char ebuf[40];
- (void)snprintf(ebuf, sizeof(ebuf), "Unknown error: %d", error);
- return (ebuf);
- }
- }
- }
- /*
- * __db_err --
- * Standard DB error routine. The same as errx, except we don't write
- * to stderr if no output mechanism was specified.
- *
- * PUBLIC: void __db_err __P((const DB_ENV *, const char *, ...));
- */
- void
- #ifdef __STDC__
- __db_err(const DB_ENV *dbenv, const char *fmt, ...)
- #else
- __db_err(dbenv, fmt, va_alist)
- const DB_ENV *dbenv;
- const char *fmt;
- va_dcl
- #endif
- {
- DB_REAL_ERR(dbenv, 0, 0, 0, fmt);
- }
- /*
- * __db_errcall --
- * Do the error message work for callback functions.
- *
- * PUBLIC: void __db_errcall
- * PUBLIC: __P((const DB_ENV *, int, int, const char *, va_list));
- */
- void
- __db_errcall(dbenv, error, error_set, fmt, ap)
- const DB_ENV *dbenv;
- int error, error_set;
- const char *fmt;
- va_list ap;
- {
- char *p;
- char errbuf[2048]; /* !!!: END OF THE STACK DON'T TRUST SPRINTF. */
- p = errbuf;
- if (fmt != NULL)
- p += vsnprintf(errbuf, sizeof(errbuf), fmt, ap);
- if (error_set)
- p += snprintf(p,
- sizeof(errbuf) - (p - errbuf), ": %s", db_strerror(error));
- /*
- * !!!
- * We're potentially manipulating strings handed us by the application,
- * and on systems without a real snprintf() the sprintf() calls could
- * have overflowed the buffer. We can't do anything about it now, but
- * we don't want to return control to the application, we might have
- * overwritten the stack with a Trojan horse. We're not trying to do
- * anything recoverable here because systems without snprintf support
- * are pretty rare anymore.
- */
- if ((size_t)(p - errbuf) > sizeof(errbuf)) {
- (void)fprintf(stderr,
- "Berkeley DB: error callback interface buffer overflown");
- (void)fflush(stderr);
- abort();
- /* NOTREACHED */
- }
- dbenv->db_errcall(dbenv->db_errpfx, errbuf);
- }
- /*
- * __db_errfile --
- * Do the error message work for FILE *s.
- *
- * PUBLIC: void __db_errfile
- * PUBLIC: __P((const DB_ENV *, int, int, const char *, va_list));
- */
- void
- __db_errfile(dbenv, error, error_set, fmt, ap)
- const DB_ENV *dbenv;
- int error, error_set;
- const char *fmt;
- va_list ap;
- {
- FILE *fp;
- fp = dbenv == NULL ||
- dbenv->db_errfile == NULL ? stderr : dbenv->db_errfile;
- if (dbenv != NULL && dbenv->db_errpfx != NULL)
- (void)fprintf(fp, "%s: ", dbenv->db_errpfx);
- if (fmt != NULL) {
- (void)vfprintf(fp, fmt, ap);
- if (error_set)
- (void)fprintf(fp, ": ");
- }
- if (error_set)
- (void)fprintf(fp, "%s", db_strerror(error));
- (void)fprintf(fp, "n");
- (void)fflush(fp);
- }
- /*
- * __db_logmsg --
- * Write information into the DB log.
- *
- * PUBLIC: void __db_logmsg __P((const DB_ENV *,
- * PUBLIC: DB_TXN *, const char *, u_int32_t, const char *, ...));
- */
- void
- #ifdef __STDC__
- __db_logmsg(const DB_ENV *dbenv,
- DB_TXN *txnid, const char *opname, u_int32_t flags, const char *fmt, ...)
- #else
- __db_logmsg(dbenv, txnid, opname, flags, fmt, va_alist)
- const DB_ENV *dbenv;
- DB_TXN *txnid;
- const char *opname, *fmt;
- u_int32_t flags;
- va_dcl
- #endif
- {
- DBT opdbt, msgdbt;
- DB_LSN lsn;
- va_list ap;
- char __logbuf[2048]; /* !!!: END OF THE STACK DON'T TRUST SPRINTF. */
- if (!LOGGING_ON(dbenv))
- return;
- #ifdef __STDC__
- va_start(ap, fmt);
- #else
- va_start(ap);
- #endif
- memset(&opdbt, 0, sizeof(opdbt));
- opdbt.data = (void *)opname;
- opdbt.size = (u_int32_t)(strlen(opname) + 1);
- memset(&msgdbt, 0, sizeof(msgdbt));
- msgdbt.data = __logbuf;
- msgdbt.size = vsnprintf(__logbuf, sizeof(__logbuf), fmt, ap);
- /*
- * XXX
- * Explicitly discard the const. Otherwise, we have to const DB_ENV
- * references throughout the logging subsystem.
- */
- __db_debug_log(
- (DB_ENV *)dbenv, txnid, &lsn, flags, &opdbt, -1, &msgdbt, NULL, 0);
- va_end(ap);
- }
- /*
- * __db_unknown_flag -- report internal error
- *
- * PUBLIC: int __db_unknown_flag __P((DB_ENV *, char *, u_int32_t));
- */
- int
- __db_unknown_flag(dbenv, routine, flag)
- DB_ENV *dbenv;
- char *routine;
- u_int32_t flag;
- {
- __db_err(dbenv, "%s: Unknown flag: 0x%x", routine, flag);
- DB_ASSERT(0);
- return (EINVAL);
- }
- /*
- * __db_unknown_type -- report internal error
- *
- * PUBLIC: int __db_unknown_type __P((DB_ENV *, char *, DBTYPE));
- */
- int
- __db_unknown_type(dbenv, routine, type)
- DB_ENV *dbenv;
- char *routine;
- DBTYPE type;
- {
- __db_err(dbenv, "%s: Unknown db type: 0x%x", routine, type);
- DB_ASSERT(0);
- return (EINVAL);
- }
- /*
- * __db_check_txn --
- * Check for common transaction errors.
- *
- * PUBLIC: int __db_check_txn __P((DB *, DB_TXN *, u_int32_t, int));
- */
- int
- __db_check_txn(dbp, txn, assoc_lid, read_op)
- DB *dbp;
- DB_TXN *txn;
- u_int32_t assoc_lid;
- int read_op;
- {
- DB_ENV *dbenv;
- dbenv = dbp->dbenv;
- /*
- * If we are in recovery or aborting a transaction, then we
- * don't need to enforce the rules about dbp's not allowing
- * transactional operations in non-transactional dbps and
- * vica-versa. This happens all the time as the dbp during
- * an abort may be transactional, but we undo operations
- * outside a transaction since we're aborting.
- */
- if (IS_RECOVERING(dbenv) || F_ISSET(dbp, DB_AM_RECOVER))
- return (0);
- /*
- * Check for common transaction errors:
- * Failure to pass a transaction handle to a DB operation
- * Failure to configure the DB handle in a proper environment
- * Operation on a handle whose open commit hasn't completed.
- *
- * Read operations don't require a txn even if we've used one before
- * with this handle, although if they do have a txn, we'd better be
- * prepared for it.
- */
- if (txn == NULL) {
- if (!read_op && F_ISSET(dbp, DB_AM_TXN)) {
- __db_err(dbenv,
- "DB handle previously used in transaction, missing transaction handle");
- return (EINVAL);
- }
- if (dbp->cur_lid >= TXN_MINIMUM)
- goto open_err;
- } else {
- if (dbp->cur_lid >= TXN_MINIMUM && dbp->cur_lid != txn->txnid)
- goto open_err;
- if (!TXN_ON(dbenv))
- return (__db_not_txn_env(dbenv));
- if (!F_ISSET(dbp, DB_AM_TXN)) {
- __db_err(dbenv,
- "Transaction specified for a DB handle opened outside a transaction");
- return (EINVAL);
- }
- }
- /*
- * If dbp->associate_lid is not DB_LOCK_INVALIDID, that means we're in
- * the middle of a DB->associate with DB_CREATE (i.e., a secondary index
- * creation).
- *
- * In addition to the usual transaction rules, we need to lock out
- * non-transactional updates that aren't part of the associate (and
- * thus are using some other locker ID).
- *
- * Transactional updates should simply block; from the time we
- * decide to build the secondary until commit, we'll hold a write
- * lock on all of its pages, so it should be safe to attempt to update
- * the secondary in another transaction (presumably by updating the
- * primary).
- */
- if (!read_op && dbp->associate_lid != DB_LOCK_INVALIDID &&
- txn != NULL && dbp->associate_lid != assoc_lid) {
- __db_err(dbenv,
- "Operation forbidden while secondary index is being created");
- return (EINVAL);
- }
- return (0);
- open_err:
- __db_err(dbenv,
- "Transaction that opened the DB handle is still active");
- return (EINVAL);
- }
- /*
- * __db_not_txn_env --
- * DB handle must be in an environment that supports transactions.
- *
- * PUBLIC: int __db_not_txn_env __P((DB_ENV *));
- */
- int
- __db_not_txn_env(dbenv)
- DB_ENV *dbenv;
- {
- __db_err(dbenv, "DB environment not configured for transactions");
- return (EINVAL);
- }