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/*-
* 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 1.1.1.1 2003/11/20 22:13:10 toshok 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 %d\n",
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 overflow\n");
(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);
}
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