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ITS#4851 retry if opening a supposedly clean shared memory env fails

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This commit is contained in:
Howard Chu 2007-02-24 20:18:56 +00:00
parent d9f63b082e
commit 4ae77ae266
1 changed files with 39 additions and 21 deletions
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60
servers/slapd/back-bdb/init.c
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@ -41,6 +41,10 @@ static const struct bdbi_database {
typedef void * db_malloc(size_t);
typedef void * db_realloc(void *, size_t);
#define bdb_db_init BDB_SYMBOL(db_init)
#define bdb_db_open BDB_SYMBOL(db_open)
#define bdb_db_close BDB_SYMBOL(db_close)
static int
bdb_db_init( BackendDB *be )
{
@ -113,19 +117,19 @@ bdb_db_open( BackendDB *be )
if ( be->be_suffix == NULL ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: need suffix\n",
LDAP_XSTRING(bdb_db_open) ": need suffix\n",
0, 0, 0 );
return -1;
}
Debug( LDAP_DEBUG_ARGS,
"bdb_db_open: %s\n",
LDAP_XSTRING(bdb_db_open) ": %s\n",
be->be_suffix[0].bv_val, 0, 0 );
#ifndef BDB_MULTIPLE_SUFFIXES
if ( be->be_suffix[1].bv_val ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
LDAP_XSTRING(bdb_db_open) ": only one suffix allowed\n", 0, 0, 0 );
return -1;
}
#endif
@ -134,7 +138,7 @@ bdb_db_open( BackendDB *be )
rc = stat( bdb->bi_dbenv_home, &stat1 );
if( rc !=0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: Cannot access database directory %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": Cannot access database directory %s (%d)\n",
bdb->bi_dbenv_home, errno, 0 );
return -1;
}
@ -156,19 +160,19 @@ bdb_db_open( BackendDB *be )
if( rc == ALOCK_RECOVER ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: unclean shutdown detected;"
LDAP_XSTRING(bdb_db_open) ": unclean shutdown detected;"
" attempting recovery.\n",
0, 0, 0 );
do_alock_recover = 1;
do_recover = DB_RECOVER;
} else if( rc == ALOCK_BUSY ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: database already in use\n",
LDAP_XSTRING(bdb_db_open) ": database already in use\n",
0, 0, 0 );
return -1;
} else if( rc != ALOCK_CLEAN ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: alock package is unstable\n",
LDAP_XSTRING(bdb_db_open) ": alock package is unstable\n",
0, 0, 0 );
return -1;
}
@ -186,7 +190,7 @@ bdb_db_open( BackendDB *be )
if( stat( path, &stat2 ) == 0 ) {
if( stat2.st_mtime < stat1.st_mtime ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix %s has changed.\n"
"Performing database recovery to activate new settings.\n",
be->be_suffix[0].bv_val, 0, 0 );
do_recover = DB_RECOVER;
@ -196,7 +200,7 @@ bdb_db_open( BackendDB *be )
}
else {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: Warning - No DB_CONFIG file found "
LDAP_XSTRING(bdb_db_open) ": Warning - No DB_CONFIG file found "
"in directory %s: (%d)\n"
"Expect poor performance for suffix %s.\n",
bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
@ -208,7 +212,7 @@ bdb_db_open( BackendDB *be )
*/
if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: Recovery skipped in read-only mode. "
LDAP_XSTRING(bdb_db_open) ": Recovery skipped in read-only mode. "
"Run manual recovery if errors are encountered.\n",
0, 0, 0 );
do_recover = 0;
@ -218,7 +222,7 @@ bdb_db_open( BackendDB *be )
/* An existing environment in Quick mode has nothing to recover. */
if ( alockt && do_recover ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: cannot recover, database must be reinitialized.\n",
LDAP_XSTRING(bdb_db_open) ": cannot recover, database must be reinitialized.\n",
0, 0, 0 );
rc = -1;
goto fail;
@ -227,7 +231,7 @@ bdb_db_open( BackendDB *be )
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: db_env_create failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
goto fail;
}
@ -244,10 +248,11 @@ bdb_db_open( BackendDB *be )
* currently requested modes, remove it.
*/
if ( !do_recover && ( alockt ^ quick )) {
shm_retry:
rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
if ( rc ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: dbenv remove failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": dbenv remove failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
bdb->bi_dbenv = NULL;
goto fail;
@ -255,7 +260,7 @@ bdb_db_open( BackendDB *be )
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: db_env_create failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
goto fail;
}
@ -274,7 +279,7 @@ bdb_db_open( BackendDB *be )
bdb->bi_dbenv_xflags, 1);
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": dbenv_set_flags failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
goto fail;
}
@ -283,7 +288,7 @@ bdb_db_open( BackendDB *be )
#define BDB_TXN_FLAGS (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
Debug( LDAP_DEBUG_TRACE,
"bdb_db_open: dbenv_open(%s)\n",
LDAP_XSTRING(bdb_db_open) ": dbenv_open(%s)\n",
bdb->bi_dbenv_home, 0, 0);
flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
@ -300,8 +305,21 @@ bdb_db_open( BackendDB *be )
flags | do_recover, bdb->bi_dbenv_mode );
if ( rc ) {
/* Regular open faied, probably a missing shm environment.
* Start over, do a recovery.
*/
if ( !do_recover && bdb->bi_shm_key ) {
bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
rc = db_env_create( &bdb->bi_dbenv, 0 );
if( rc == 0 ) {
Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
": Shared memory env open failed, assuming stale env\n",
0, 0, 0 );
goto shm_retry;
}
}
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: Database cannot be %s, err %d. "
LDAP_XSTRING(bdb_db_open) ": Database cannot be %s, err %d. "
"Restore from backup!\n",
do_recover ? "recovered" : "opened", rc, 0);
goto fail;
@ -309,7 +327,7 @@ bdb_db_open( BackendDB *be )
if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: alock_recover failed\n",
LDAP_XSTRING(bdb_db_open) ": alock_recover failed\n",
0, 0, 0 );
rc = -1;
goto fail;
@ -347,7 +365,7 @@ bdb_db_open( BackendDB *be )
rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: db_create(%s) failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": db_create(%s) failed: %s (%d)\n",
bdb->bi_dbenv_home, db_strerror(rc), rc );
goto fail;
}
@ -408,7 +426,7 @@ bdb_db_open( BackendDB *be )
snprintf( buf, sizeof(buf), "%s/%s",
bdb->bi_dbenv_home, bdbi_databases[i].file );
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: db_open(%s) failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": db_open(%s) failed: %s (%d)\n",
buf, db_strerror(rc), rc );
db->bdi_db->close( db->bdi_db, 0 );
goto fail;
@ -426,7 +444,7 @@ bdb_db_open( BackendDB *be )
rc = bdb_last_id( be, NULL );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"bdb_db_open: last_id(%s) failed: %s (%d)\n",
LDAP_XSTRING(bdb_db_open) ": last_id(%s) failed: %s (%d)\n",
bdb->bi_dbenv_home, db_strerror(rc), rc );
goto fail;
}