void RegThread::run() {
DBG("registrar client started.\n");
sleep(2); // wait for sems to completely start up
while (true) {
for (vector<RegInfo>::iterator it = registrations.begin();
it != registrations.end(); it++) {
if (!check_registration(*it)) {
DBG("Registration %d does not exist or timeout. Creating registration.\n",
(int)(it - registrations.begin()));
create_registration(*it);
}
}
sleep(10); // 10 seconds
}
}
void pr_reserve_out(pr_context_t *context, lun_t lun,
const unsigned char *cdb, int session_id,
scsi_command_status_t *scsi_status)
{
pr_info_t *pr_info = &context->pr_info[lun];
EXA_ASSERT(session_id < MAX_GLOBAL_SESSION);
if (cdb[0] == RESERVE_6)
{
if (persistent_spc2_reserve_lun(context, session_id, lun, scsi_status))
SCSI_STATUS_OK(scsi_status, 0);
else
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_RESERVATION_CONFLICT, 0, 0);
return;
}
if (cdb[0] == RELEASE_6)
{
if (persistent_spc2_release_lun(context, session_id, lun, scsi_status))
SCSI_STATUS_OK(scsi_status, 0);
else
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_RESERVATION_CONFLICT, 0, 0);
return;
}
if (cdb[0] == PERSISTENT_RESERVE_OUT)
{
/* int len = get_bigendian32(cdb + 5); // FIXME: TODO: must be checked for all service action */
int pr_scope = cdb[2] >> 4;
int pr_type = cdb[2] & 0xf;
const unsigned char *param = cdb + SCSI_CDB_MAX_FIXED_LENGTH;
pr_key_t reservation_key = get_bigendian64(param);
pr_key_t service_action_key = get_bigendian64(param + 8);
unsigned char flags = param[20];
unsigned char spec_i_pt = (flags >> 3) & 1;
/* unsigned char all_tg_pt = (flags >>2) & 1 ; */
int service_action = cdb[1] & 0x1f;
/* spc3r23 table 116 "allowed scope" */
if (pr_scope != PR_LU_SCOPE
&& service_action != PR_OUT_REGISTER
&& service_action != PR_OUT_REGISTER_AND_IGNORE_EXISTING_KEY
&& service_action != PR_OUT_CLEAR)
{
exalog_error("iSCSI PR failed: "
"reserve operation (%i) from session %i on LUN %" PRIlun
" is not allowed in this scope",
service_action, session_id, lun);
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_SENSE_ASC_INVALID_FIELD_IN_CDB);
return;
}
if (check_registration(context, session_id, lun, reservation_key,
service_action) != SCSI_STATUS_GOOD)
{
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_RESERVATION_CONFLICT, 0, 0);
return;
}
switch (service_action)
{
case PR_OUT_REGISTER:
if (spec_i_pt == 0)
{
persistent_register_lun(context, session_id,
lun, service_action_key, scsi_status);
break;
}
/* spec_i_pt == 1 ! */
if (reservation_key != 0) /* spec_i_pt == 1 and we are on a registered nexus */
{
exalog_warning("iSCSI PR conflict: "
"reserve operation (%i) from session %i on LUN %" PRIlun
" is not allowed, already registered nexus %" PRIu64,
service_action, session_id, lun, reservation_key);
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_SENSE_ASC_INVALID_FIELD_IN_CDB);
break;
;
}
persistent_register_lun(context, session_id, lun,
service_action_key, scsi_status);
break;
case PR_OUT_REGISTER_AND_IGNORE_EXISTING_KEY:
if (service_action_key == 0
&& !pr_info_is_registered(pr_info, session_id))
{
/* FIXME: is this a "nothing to do" case ? */
exalog_debug("iSCSI PR: register and ignore existing keys"
" from session %i on LUN %" PRIlun " (ntd)",
session_id, lun);
SCSI_STATUS_OK(scsi_status, 0);
break;
}
if (spec_i_pt == 1)
{
exalog_warning("iSCSI PR failed: "
"reserve operation (%i) from session %i on LUN %" PRIlun
" is not allowed",
service_action, session_id, lun);
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_SENSE_ASC_INVALID_FIELD_IN_CDB);
break;
}
persistent_register_lun(context, session_id, lun,
service_action_key, scsi_status);
break;
case PR_OUT_RESERVE:
if (persistent_reserve_lun(context, session_id, lun,
reservation_key, pr_type))
SCSI_STATUS_OK(scsi_status, 0);
else
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_RESERVATION_CONFLICT,
0, 0);
break;
case PR_OUT_RELEASE:
persistent_release_lun(context, session_id, lun,
reservation_key, pr_type, scsi_status);
break;
case PR_OUT_CLEAR:
persistent_clear_lun(context, session_id, lun, scsi_status);
break;
case PR_OUT_PREEMPT:
persistent_preempt_lun(context, session_id, lun,
reservation_key, service_action_key,
pr_type, scsi_status);
break;
case PR_OUT_PREEMPT_AND_ABORT:
persistent_preempt_lun(context, session_id, lun,
reservation_key, service_action_key,
pr_type, scsi_status);
break;
/* FIXME : we must add abort task set and it's not done spc3 - 5.6.10.5 */
case PR_OUT_REGISTER_AND_MOVE:
/* FIXME : not implemented ,not needed for windows */
exalog_error("iSCSI PR failed: "
"reserve operation 'register_and_move' not supported"
" (from session %i on LUN %" PRIlun ")",
session_id, lun);
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST, 0);
break;
default:
exalog_error("iSCSI PR failed: "
"reserve operation (%i) not expected"
" (from session %i on LUN %" PRIlun ")",
service_action, session_id, lun);
SCSI_STATUS_ERROR(scsi_status, SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST, 0);
break;
}
/* PR generation sp3r23 6.11.2 */
if (scsi_status->status == SCSI_STATUS_GOOD
&& service_action != PR_OUT_RESERVE
&& service_action != PR_OUT_RELEASE)
{
pr_info->pr_generation++;
}
}
