int
iscsi_discovery_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
void *private_data)
{
struct iscsi_pdu *pdu;
char *str;
if (iscsi->session_type != ISCSI_SESSION_DISCOVERY) {
iscsi_set_error(iscsi, "Trying to do discovery on "
"non-discovery session.");
return -1;
}
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_TEXT_REQUEST,
ISCSI_PDU_TEXT_RESPONSE,
iscsi_itt_post_increment(iscsi),
ISCSI_PDU_DROP_ON_RECONNECT);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Out-of-memory: Failed to allocate "
"text pdu.");
return -1;
}
/* immediate */
iscsi_pdu_set_immediate(pdu);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
/* flags */
iscsi_pdu_set_pduflags(pdu, ISCSI_PDU_TEXT_FINAL);
/* target transfer tag */
iscsi_pdu_set_ttt(pdu, 0xffffffff);
/* sendtargets */
str = (char *)"SendTargets=All";
if (iscsi_pdu_add_data(iscsi, pdu, (unsigned char *)str, strlen(str)+1)
!= 0) {
iscsi_set_error(iscsi, "Out-of-memory: pdu add data failed.");
iscsi->drv->free_pdu(iscsi, pdu);
return -1;
}
pdu->callback = cb;
pdu->private_data = private_data;
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "Out-of-memory: failed to queue iscsi "
"text pdu.");
iscsi->drv->free_pdu(iscsi, pdu);
return -1;
}
return 0;
}
int iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb, unsigned char *data, int len, void *private_data)
{
struct iscsi_pdu *pdu;
if (iscsi == NULL) {
printf("trying to send nop-out on NULL context\n");
return -1;
}
if (iscsi->is_loggedin == 0) {
printf("trying send nop-out while not logged in\n");
return -2;
}
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_NOP_OUT, ISCSI_PDU_NOP_IN);
if (pdu == NULL) {
printf("Failed to allocate nop-out pdu\n");
return -3;
}
/* immediate flag */
iscsi_pdu_set_immediate(pdu);
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80);
/* ttt */
iscsi_pdu_set_ttt(pdu, 0xffffffff);
/* lun */
iscsi_pdu_set_lun(pdu, 2);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->cmdsn = iscsi->cmdsn;
// iscsi->cmdsn++;
pdu->callback = cb;
pdu->private_data = private_data;
if (iscsi_pdu_add_data(iscsi, pdu, data, len) != 0) {
printf("Failed to add outdata to nop-out\n");
iscsi_free_pdu(iscsi, pdu);
return -4;
}
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
printf("failed to queue iscsi nop-out pdu\n");
iscsi_free_pdu(iscsi, pdu);
return -5;
}
return 0;
}
int
iscsi_task_mgmt_async(struct iscsi_context *iscsi,
int lun, enum iscsi_task_mgmt_funcs function,
uint32_t ritt, uint32_t rcmdsn,
iscsi_command_cb cb, void *private_data)
{
struct iscsi_pdu *pdu;
if (iscsi->is_loggedin == 0) {
iscsi_set_error(iscsi, "trying to send task-mgmt while not "
"logged in");
return -1;
}
pdu = iscsi_allocate_pdu(iscsi,
ISCSI_PDU_SCSI_TASK_MANAGEMENT_REQUEST,
ISCSI_PDU_SCSI_TASK_MANAGEMENT_RESPONSE,
iscsi_itt_post_increment(iscsi),
ISCSI_PDU_DROP_ON_RECONNECT);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Failed to allocate task mgmt pdu");
return -1;
}
/* immediate flag */
iscsi_pdu_set_immediate(pdu);
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80 | function);
/* lun */
iscsi_pdu_set_lun(pdu, lun);
/* ritt */
iscsi_pdu_set_ritt(pdu, ritt);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
/* rcmdsn */
iscsi_pdu_set_rcmdsn(pdu, rcmdsn);
pdu->callback = cb;
pdu->private_data = private_data;
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "failed to queue iscsi taskmgmt pdu");
iscsi->t->free_pdu(iscsi, pdu);
return -1;
}
return 0;
}
void
iscsi_add_to_outqueue(struct iscsi_context *iscsi, struct iscsi_pdu *pdu)
{
struct iscsi_pdu *current = iscsi->outqueue;
struct iscsi_pdu *last = NULL;
if (iscsi->scsi_timeout > 0) {
pdu->scsi_timeout = time(NULL) + iscsi->scsi_timeout;
} else {
pdu->scsi_timeout = 0;
}
if (iscsi->outqueue == NULL) {
iscsi->outqueue = pdu;
pdu->next = NULL;
return;
}
/* queue pdus in ascending order of CmdSN.
* ensure that pakets with the same CmdSN are kept in FIFO order.
* immediate PDUs are queued in front of queue with the CmdSN
* of the first element in the outqueue.
*/
if (pdu->outdata.data[0] & ISCSI_PDU_IMMEDIATE) {
iscsi_pdu_set_cmdsn(pdu, current->cmdsn);
}
do {
if (iscsi_serial32_compare(pdu->cmdsn, current->cmdsn) < 0 ||
(pdu->outdata.data[0] & ISCSI_PDU_IMMEDIATE && !(current->outdata.data[0] & ISCSI_PDU_IMMEDIATE))) {
/* insert PDU before the current */
if (last != NULL) {
last->next=pdu;
} else {
iscsi->outqueue=pdu;
}
pdu->next = current;
return;
}
last=current;
current=current->next;
} while (current != NULL);
last->next = pdu;
pdu->next = NULL;
}
int
iscsi_logout_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
void *private_data)
{
struct iscsi_pdu *pdu;
iscsi->login_attempts = 0;
if (iscsi->is_loggedin == 0) {
iscsi_set_error(iscsi, "Trying to logout while not logged in.");
return -1;
}
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_LOGOUT_REQUEST,
ISCSI_PDU_LOGOUT_RESPONSE);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Out-of-memory: Failed to allocate "
"logout pdu.");
return -1;
}
/* logout request has the immediate flag set */
iscsi_pdu_set_immediate(pdu);
/* flags : close the session */
iscsi_pdu_set_pduflags(pdu, 0x80);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->cmdsn = iscsi->cmdsn;
/* exp statsn */
iscsi_pdu_set_expstatsn(pdu, iscsi->statsn+1);
pdu->callback = cb;
pdu->private_data = private_data;
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "Out-of-memory: failed to queue iscsi "
"logout pdu.");
iscsi_free_pdu(iscsi, pdu);
return -1;
}
return 0;
}
int
iscsi_send_target_nop_out(struct iscsi_context *iscsi, uint32_t ttt, uint32_t lun)
{
struct iscsi_pdu *pdu;
pdu = iscsi_allocate_pdu(iscsi,
ISCSI_PDU_NOP_OUT,
ISCSI_PDU_NO_PDU,
0xffffffff,
ISCSI_PDU_DROP_ON_RECONNECT|ISCSI_PDU_DELETE_WHEN_SENT);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Failed to allocate nop-out pdu");
return -1;
}
/* immediate flag */
iscsi_pdu_set_immediate(pdu);
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80);
/* ttt */
iscsi_pdu_set_ttt(pdu, ttt);
/* lun */
iscsi_pdu_set_lun(pdu, lun);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "failed to queue iscsi nop-out pdu");
iscsi->drv->free_pdu(iscsi, pdu);
return -1;
}
ISCSI_LOG(iscsi, (iscsi->nops_in_flight > 1) ? 1 : 6,
"NOP Out Send (nops_in_flight: %d, pdu->cmdsn %08x, pdu->itt %08x, pdu->ttt %08x, pdu->lun %8x, iscsi->maxcmdsn %08x, iscsi->expcmdsn %08x)",
iscsi->nops_in_flight, pdu->cmdsn, 0xffffffff, ttt, lun, iscsi->maxcmdsn, iscsi->expcmdsn);
return 0;
}
int
iscsi_send_target_nop_out(struct iscsi_context *iscsi, uint32_t ttt)
{
struct iscsi_pdu *pdu;
pdu = iscsi_allocate_pdu_with_itt_flags(iscsi, ISCSI_PDU_NOP_OUT, ISCSI_PDU_NO_PDU,
0xffffffff,ISCSI_PDU_DELETE_WHEN_SENT|ISCSI_PDU_NO_CALLBACK);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Failed to allocate nop-out pdu");
return -1;
}
/* immediate flag */
iscsi_pdu_set_immediate(pdu);
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80);
/* ttt */
iscsi_pdu_set_ttt(pdu, ttt);
/* lun */
iscsi_pdu_set_lun(pdu, 0);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->cmdsn = iscsi->cmdsn;
/* exp statsn */
iscsi_pdu_set_expstatsn(pdu, iscsi->statsn+1);
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "failed to queue iscsi nop-out pdu");
iscsi_free_pdu(iscsi, pdu);
return -1;
}
return 0;
}
int
iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
unsigned char *data, int len, void *private_data)
{
struct iscsi_pdu *pdu;
if (iscsi->old_iscsi || iscsi->pending_reconnect) {
ISCSI_LOG(iscsi, (iscsi->nops_in_flight > 1) ? 1 : 6,
"NOP Out Send NOT SEND while reconnecting (nops_in_flight: %d, iscsi->maxcmdsn %08x, iscsi->expcmdsn %08x)",
iscsi->nops_in_flight, iscsi->maxcmdsn, iscsi->expcmdsn);
return 0;
}
if (iscsi->is_loggedin == 0) {
iscsi_set_error(iscsi, "trying to send nop-out while not "
"logged in");
return -1;
}
pdu = iscsi_allocate_pdu(iscsi,
ISCSI_PDU_NOP_OUT,
ISCSI_PDU_NOP_IN,
iscsi_itt_post_increment(iscsi),
ISCSI_PDU_DROP_ON_RECONNECT);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Failed to allocate nop-out pdu");
return -1;
}
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80);
/* ttt */
iscsi_pdu_set_ttt(pdu, 0xffffffff);
/* lun */
iscsi_pdu_set_lun(pdu, 0);
/* cmdsn */
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn++);
pdu->callback = cb;
pdu->private_data = private_data;
if (data != NULL && len > 0) {
if (iscsi_pdu_add_data(iscsi, pdu, data, len) != 0) {
iscsi_set_error(iscsi, "Failed to add outdata to nop-out");
iscsi->drv->free_pdu(iscsi, pdu);
return -1;
}
}
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "failed to queue iscsi nop-out pdu");
iscsi->drv->free_pdu(iscsi, pdu);
return -1;
}
iscsi->nops_in_flight++;
ISCSI_LOG(iscsi, (iscsi->nops_in_flight > 1) ? 1 : 6,
"NOP Out Send (nops_in_flight: %d, pdu->cmdsn %08x, pdu->itt %08x, pdu->ttt %08x, iscsi->maxcmdsn %08x, iscsi->expcmdsn %08x)",
iscsi->nops_in_flight, pdu->cmdsn, pdu->itt, 0xffffffff, iscsi->maxcmdsn, iscsi->expcmdsn);
return 0;
}
static int iscsi_scsi_command_async(struct iscsi_context *iscsi, int lun, struct scsi_task *task, iscsi_command_cb cb, struct iscsi_data *data, void *private_data)
{
struct iscsi_pdu *pdu;
struct iscsi_scsi_cbdata *scsi_cbdata;
int flags;
if (iscsi == NULL) {
printf("trying to send command on NULL context\n");
scsi_free_scsi_task(task);
return -1;
}
if (iscsi->session_type != ISCSI_SESSION_NORMAL) {
printf("Trying to send command on discovery session\n");
scsi_free_scsi_task(task);
return -2;
}
if (iscsi->is_loggedin == 0) {
printf("Trying to send command while not logged in\n");
scsi_free_scsi_task(task);
return -3;
}
scsi_cbdata = malloc(sizeof(struct iscsi_scsi_cbdata));
if (scsi_cbdata == NULL) {
printf("failed to allocate scsi cbdata\n");
scsi_free_scsi_task(task);
return -4;
}
bzero(scsi_cbdata, sizeof(struct iscsi_scsi_cbdata));
scsi_cbdata->task = task;
scsi_cbdata->callback = cb;
scsi_cbdata->private_data = private_data;
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_SCSI_REQUEST, ISCSI_PDU_SCSI_RESPONSE);
if (pdu == NULL) {
printf("Failed to allocate text pdu\n");
iscsi_free_scsi_cbdata(scsi_cbdata);
return -5;
}
pdu->scsi_cbdata = scsi_cbdata;
/* flags */
flags = ISCSI_PDU_SCSI_FINAL|ISCSI_PDU_SCSI_ATTR_SIMPLE;
switch (task->xfer_dir) {
case SCSI_XFER_NONE:
break;
case SCSI_XFER_READ:
flags |= ISCSI_PDU_SCSI_READ;
break;
case SCSI_XFER_WRITE:
flags |= ISCSI_PDU_SCSI_WRITE;
if (data == NULL) {
printf("DATA-OUT command but data == NULL\n");
iscsi_free_pdu(iscsi, pdu);
return -5;
}
if (data->size != task->expxferlen) {
printf("data size:%d is not same as expected data transfer length:%d\n", data->size, task->expxferlen);
iscsi_free_pdu(iscsi, pdu);
return -7;
}
if (iscsi_pdu_add_data(iscsi, pdu, data->data, data->size) != 0) {
printf("Failed to add outdata to the pdu\n");
iscsi_free_pdu(iscsi, pdu);
return -6;
}
break;
}
iscsi_pdu_set_pduflags(pdu, flags);
/* lun */
iscsi_pdu_set_lun(pdu, lun);
/* expxferlen */
iscsi_pdu_set_expxferlen(pdu, task->expxferlen);
/* cmdsn */
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->cmdsn = iscsi->cmdsn;
iscsi->cmdsn++;
/* exp statsn */
iscsi_pdu_set_expstatsn(pdu, iscsi->statsn+1);
/* cdb */
iscsi_pdu_set_cdb(pdu, task);
pdu->callback = iscsi_scsi_response_cb;
pdu->private_data = scsi_cbdata;
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
printf("failed to queue iscsi scsi pdu\n");
iscsi_free_pdu(iscsi, pdu);
return -6;
}
return 0;
}