static enum agent_return do_operation(enum operation op, const char *name)
{
TDB_DATA k;
enum agent_return ret;
TDB_DATA data;
enum TDB_ERROR ecode;
union tdb_attribute cif;
if (op != OPEN && op != OPEN_WITH_HOOK && !tdb) {
diag("external: No tdb open!");
return OTHER_FAILURE;
}
diag("external: %s", operation_name(op));
k = tdb_mkdata(name, strlen(name));
locking_would_block = 0;
switch (op) {
case OPEN:
if (tdb) {
diag("Already have tdb %s open", tdb_name(tdb));
return OTHER_FAILURE;
}
tdb = tdb_open(name, TDB_DEFAULT, O_RDWR, 0, &tap_log_attr);
if (!tdb) {
if (!locking_would_block)
diag("Opening tdb gave %s", strerror(errno));
forget_locking();
ret = OTHER_FAILURE;
} else
ret = SUCCESS;
break;
case OPEN_WITH_HOOK:
if (tdb) {
diag("Already have tdb %s open", tdb_name(tdb));
return OTHER_FAILURE;
}
cif.openhook.base.attr = TDB_ATTRIBUTE_OPENHOOK;
cif.openhook.base.next = &tap_log_attr;
cif.openhook.fn = clear_if_first;
tdb = tdb_open(name, TDB_DEFAULT, O_RDWR, 0, &cif);
if (!tdb) {
if (!locking_would_block)
diag("Opening tdb gave %s", strerror(errno));
forget_locking();
ret = OTHER_FAILURE;
} else
ret = SUCCESS;
break;
case FETCH:
ecode = tdb_fetch(tdb, k, &data);
if (ecode == TDB_ERR_NOEXIST) {
ret = FAILED;
} else if (ecode < 0) {
ret = OTHER_FAILURE;
} else if (!tdb_deq(data, k)) {
ret = OTHER_FAILURE;
external_agent_free(data.dptr);
} else {
ret = SUCCESS;
external_agent_free(data.dptr);
}
break;
case STORE:
ret = tdb_store(tdb, k, k, 0) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case TRANSACTION_START:
ret = tdb_transaction_start(tdb) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case TRANSACTION_COMMIT:
ret = tdb_transaction_commit(tdb)==0 ? SUCCESS : OTHER_FAILURE;
break;
case NEEDS_RECOVERY:
ret = external_agent_needs_rec(tdb);
break;
case CHECK:
ret = tdb_check(tdb, NULL, NULL) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case CLOSE:
ret = tdb_close(tdb) == 0 ? SUCCESS : OTHER_FAILURE;
tdb = NULL;
break;
case SEND_SIGNAL:
/* We do this async */
ret = SUCCESS;
break;
default:
ret = OTHER_FAILURE;
}
if (locking_would_block)
ret = WOULD_HAVE_BLOCKED;
return ret;
}
static enum agent_return do_operation(enum operation op, const char *name)
{
NTDB_DATA k, d;
enum agent_return ret;
NTDB_DATA data;
enum NTDB_ERROR ecode;
union ntdb_attribute cif;
const char *eq;
if (op != OPEN && op != OPEN_WITH_HOOK && !ntdb) {
diag("external: No ntdb open!");
return OTHER_FAILURE;
}
diag("external: %s", operation_name(op));
eq = strchr(name, '=');
if (eq) {
k = ntdb_mkdata(name, eq - name);
d = ntdb_mkdata(eq + 1, strlen(eq+1));
} else {
k = ntdb_mkdata(name, strlen(name));
d.dsize = 0;
d.dptr = NULL;
}
locking_would_block = 0;
switch (op) {
case OPEN:
if (ntdb) {
diag("Already have ntdb %s open", ntdb_name(ntdb));
return OTHER_FAILURE;
}
ntdb = ntdb_open(name, MAYBE_NOSYNC, O_RDWR, 0, &tap_log_attr);
if (!ntdb) {
if (!locking_would_block)
diag("Opening ntdb gave %s", strerror(errno));
forget_locking();
ret = OTHER_FAILURE;
} else
ret = SUCCESS;
break;
case OPEN_WITH_HOOK:
if (ntdb) {
diag("Already have ntdb %s open", ntdb_name(ntdb));
return OTHER_FAILURE;
}
cif.openhook.base.attr = NTDB_ATTRIBUTE_OPENHOOK;
cif.openhook.base.next = &tap_log_attr;
cif.openhook.fn = clear_if_first;
ntdb = ntdb_open(name, MAYBE_NOSYNC, O_RDWR, 0, &cif);
if (!ntdb) {
if (!locking_would_block)
diag("Opening ntdb gave %s", strerror(errno));
forget_locking();
ret = OTHER_FAILURE;
} else
ret = SUCCESS;
break;
case FETCH:
ecode = ntdb_fetch(ntdb, k, &data);
if (ecode == NTDB_ERR_NOEXIST) {
ret = FAILED;
} else if (ecode < 0) {
ret = OTHER_FAILURE;
} else if (!ntdb_deq(data, d)) {
ret = OTHER_FAILURE;
external_agent_free(data.dptr);
} else {
ret = SUCCESS;
external_agent_free(data.dptr);
}
break;
case STORE:
ret = ntdb_store(ntdb, k, d, 0) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case TRANSACTION_START:
ret = ntdb_transaction_start(ntdb) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case TRANSACTION_COMMIT:
ret = ntdb_transaction_commit(ntdb)==0 ? SUCCESS : OTHER_FAILURE;
break;
case NEEDS_RECOVERY:
ret = external_agent_needs_rec(ntdb);
break;
case CHECK:
ret = ntdb_check(ntdb, NULL, NULL) == 0 ? SUCCESS : OTHER_FAILURE;
break;
case CLOSE:
ret = ntdb_close(ntdb) == 0 ? SUCCESS : OTHER_FAILURE;
ntdb = NULL;
break;
case SEND_SIGNAL:
/* We do this async */
ret = SUCCESS;
break;
default:
ret = OTHER_FAILURE;
}
if (locking_would_block)
ret = WOULD_HAVE_BLOCKED;
return ret;
}
