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ctdb-daemon: Add accessors for CTDB_DB_FLAGS_PERSISTENT flag

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This allows to differentiate between the two database models.

ctdb_db_persistent() - replicated and permanent
ctdb_db_volatile() - distributed and temporary

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
This commit is contained in:
Amitay Isaacs 2017-03-02 15:39:29 +11:00 committed by Martin Schwenke
parent 2975de6ffb
commit 94af277c48
10 changed files with 47 additions and 26 deletions
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5
ctdb/client/ctdb_client.c
View File

@ -933,8 +933,9 @@ again:
*/
int ctdb_record_store(struct ctdb_record_handle *h, TDB_DATA data)
{
if (h->ctdb_db->persistent) {
DEBUG(DEBUG_ERR, (__location__ " ctdb_record_store prohibited for persistent dbs\n"));
if (! ctdb_db_volatile(h->ctdb_db)) {
DEBUG(DEBUG_ERR,
("ctdb_record_store prohibited for non-volatile dbs\n"));
return -1;
}

3
ctdb/common/common.h
View File

@ -44,6 +44,9 @@ int ctdb_db_tdb_flags(uint8_t db_flags, bool with_valgrind, bool with_mutex);
struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb,
const char *name);
bool ctdb_db_persistent(struct ctdb_db_context *ctdb_db);
bool ctdb_db_volatile(struct ctdb_db_context *ctdb_db);
uint32_t ctdb_lmaster(struct ctdb_context *ctdb, const TDB_DATA *key);
int ctdb_ltdb_fetch(struct ctdb_db_context *ctdb_db,

18
ctdb/common/ctdb_ltdb.c
View File

@ -78,6 +78,15 @@ struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb, const char *na
return NULL;
}
bool ctdb_db_persistent(struct ctdb_db_context *ctdb_db)
{
return ctdb_db->persistent;
}
bool ctdb_db_volatile(struct ctdb_db_context *ctdb_db)
{
return !ctdb_db->persistent;
}
/*
return the lmaster given a key
@ -133,7 +142,8 @@ int ctdb_ltdb_fetch(struct ctdb_db_context *ctdb_db,
if (data) {
*data = tdb_null;
}
if (ctdb_db->persistent || header->dmaster == ctdb_db->ctdb->pnn) {
if (ctdb_db_persistent(ctdb_db) ||
header->dmaster == ctdb_db->ctdb->pnn) {
if (ctdb_ltdb_store(ctdb_db, key, header, tdb_null) != 0) {
DEBUG(DEBUG_NOTICE,
(__location__ "failed to store initial header\n"));
@ -285,8 +295,10 @@ int ctdb_ltdb_unlock(struct ctdb_db_context *ctdb_db, TDB_DATA key)
*/
int ctdb_ltdb_delete(struct ctdb_db_context *ctdb_db, TDB_DATA key)
{
if (ctdb_db->persistent != 0) {
DEBUG(DEBUG_ERR,("Trying to delete empty record in persistent database\n"));
if (! ctdb_db_volatile(ctdb_db)) {
DEBUG(DEBUG_WARNING,
("Ignored deletion of empty record from "
"non-volatile database\n"));
return 0;
}
if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {

2
ctdb/server/ctdb_call.c
View File

@ -1974,7 +1974,7 @@ int ctdb_migration_init(struct ctdb_db_context *ctdb_db)
struct tevent_timer *te;
int ret;
if (ctdb_db->persistent) {
if (! ctdb_db_volatile(ctdb_db)) {
return 0;
}

2
ctdb/server/ctdb_freeze.c
View File

@ -845,7 +845,7 @@ int32_t ctdb_control_wipe_database(struct ctdb_context *ctdb, TDB_DATA indata)
return -1;
}
if (!ctdb_db->persistent) {
if (ctdb_db_volatile(ctdb_db)) {
talloc_free(ctdb_db->delete_queue);
ctdb_db->delete_queue = trbt_create(ctdb_db, 0);
if (ctdb_db->delete_queue == NULL) {

27
ctdb/server/ctdb_ltdb_server.c
View File

@ -143,7 +143,7 @@ static int ctdb_ltdb_store_server(struct ctdb_db_context *ctdb_db,
}
if (keep) {
if (!ctdb_db->persistent &&
if (ctdb_db_volatile(ctdb_db) &&
(ctdb_db->ctdb->pnn == header->dmaster) &&
!(header->flags & CTDB_REC_RO_FLAGS))
{
@ -607,7 +607,7 @@ int ctdb_recheck_persistent_health(struct ctdb_context *ctdb)
int fail = 0;
for (ctdb_db = ctdb->db_list; ctdb_db; ctdb_db = ctdb_db->next) {
if (!ctdb_db->persistent) {
if (!ctdb_db_persistent(ctdb_db)) {
continue;
}
@ -722,8 +722,9 @@ int ctdb_set_db_readonly(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb
return 0;
}
if (ctdb_db->persistent) {
DEBUG(DEBUG_ERR,("Persistent databases do not support readonly property\n"));
if (! ctdb_db_volatile(ctdb_db)) {
DEBUG(DEBUG_ERR,
("Non-volatile databases do not support readonly flag\n"));
return -1;
}
@ -779,7 +780,7 @@ static int ctdb_local_attach(struct ctdb_context *ctdb, const char *db_name,
ctdb_db->db_id = ctdb_hash(&key);
ctdb_db->persistent = persistent;
if (!ctdb_db->persistent) {
if (ctdb_db_volatile(ctdb_db)) {
ctdb_db->delete_queue = trbt_create(ctdb_db, 0);
if (ctdb_db->delete_queue == NULL) {
CTDB_NO_MEMORY(ctdb, ctdb_db->delete_queue);
@ -1170,10 +1171,10 @@ int32_t ctdb_control_db_attach(struct ctdb_context *ctdb, TDB_DATA indata,
/* see if we already have this name */
db = ctdb_db_handle(ctdb, db_name);
if (db) {
if (db->persistent != persistent) {
if (ctdb_db_persistent(db) != persistent) {
DEBUG(DEBUG_ERR, ("ERROR: DB Attach %spersistent to %spersistent "
"database %s\n", persistent ? "" : "non-",
db-> persistent ? "" : "non-", db_name));
ctdb_db_persistent(db) ? "" : "non-", db_name));
return -1;
}
outdata->dptr = (uint8_t *)&db->db_id;
@ -1234,9 +1235,10 @@ int32_t ctdb_control_db_detach(struct ctdb_context *ctdb, TDB_DATA indata,
return -1;
}
if (ctdb_db->persistent) {
DEBUG(DEBUG_ERR, ("DB detach from persistent database %s "
"denied\n", ctdb_db->db_name));
if (! ctdb_db_volatile(ctdb_db)) {
DEBUG(DEBUG_ERR,
("Detaching non-volatile database %s denied\n",
ctdb_db->db_name));
return -1;
}
@ -1572,8 +1574,9 @@ int ctdb_set_db_sticky(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_d
return 0;
}
if (ctdb_db->persistent) {
DEBUG(DEBUG_ERR,("Trying to set persistent database with sticky property\n"));
if (! ctdb_db_volatile(ctdb_db)) {
DEBUG(DEBUG_ERR,
("Non-volatile databases do not support sticky flag\n"));
return -1;
}

2
ctdb/server/ctdb_recover.c
View File

@ -115,7 +115,7 @@ ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indat
dbid_map->num = len;
for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
dbid_map->dbs[i].db_id = ctdb_db->db_id;
if (ctdb_db->persistent != 0) {
if (ctdb_db_persistent(ctdb_db)) {
dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_PERSISTENT;
}
if (ctdb_db->readonly != 0) {

6
ctdb/server/ctdb_traverse.c
View File

@ -120,7 +120,7 @@ static int ctdb_traverse_local_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DAT
hdr = (struct ctdb_ltdb_header *)data.dptr;
if (h->ctdb_db->persistent == 0) {
if (ctdb_db_volatile(h->ctdb_db)) {
/* filter out zero-length records */
if (!h->withemptyrecords &&
data.dsize <= sizeof(struct ctdb_ltdb_header))
@ -386,7 +386,7 @@ static struct ctdb_traverse_all_handle *ctdb_daemon_traverse_all(struct ctdb_db_
data.dsize = sizeof(r);
}
if (ctdb_db->persistent == 0) {
if (ctdb_db_volatile(ctdb_db)) {
/* normal database, traverse all nodes */
destination = CTDB_BROADCAST_VNNMAP;
} else {
@ -587,7 +587,7 @@ int32_t ctdb_control_traverse_data(struct ctdb_context *ctdb, TDB_DATA data, TDB
/* Persistent databases are only scanned on one node (the local
* node)
*/
if (state->ctdb_db->persistent == 0) {
if (ctdb_db_volatile(state->ctdb_db)) {
if (state->null_count != ctdb_get_num_active_nodes(ctdb)) {
return 0;
}

2
ctdb/server/ctdb_update_record.c
View File

@ -339,7 +339,7 @@ int32_t ctdb_control_update_record(struct ctdb_context *ctdb,
state->c = c;
state->m = m;
state->flags = 0;
if (!ctdb_db->persistent) {
if (ctdb_db_volatile(ctdb_db)) {
state->flags = UPDATE_FLAGS_REPLACE_ONLY;
}

6
ctdb/server/ctdb_vacuum.c
View File

@ -1574,8 +1574,10 @@ void ctdb_stop_vacuuming(struct ctdb_context *ctdb)
*/
int ctdb_vacuum_init(struct ctdb_db_context *ctdb_db)
{
if (ctdb_db->persistent != 0) {
DEBUG(DEBUG_ERR,("Vacuuming is disabled for persistent database %s\n", ctdb_db->db_name));
if (! ctdb_db_volatile(ctdb_db)) {
DEBUG(DEBUG_ERR,
("Vacuuming is disabled for non-volatile database %s\n",
ctdb_db->db_name));
return 0;
}