static void
target_stat(char **msg, char *targ_name, mgmt_type_t type)
{
iscsi_conn_t *c;
msg_t *m;
target_queue_t *q = queue_alloc();
mgmt_request_t mgmt_rqst;
int msg_sent,
i;
extern pthread_mutex_t port_mutex;
mgmt_rqst.m_q = q;
mgmt_rqst.m_u.m_resp = msg;
mgmt_rqst.m_time = time(NULL);
mgmt_rqst.m_request = type;
(void) pthread_mutex_init(&mgmt_rqst.m_resp_mutex, NULL);
(void) pthread_mutex_lock(&port_mutex);
mgmt_rqst.m_targ_name = targ_name;
msg_sent = 0;
for (c = conn_head; c; c = c->c_next) {
if (c->c_state == S5_LOGGED_IN) {
/*
* Only send requests for statistics to
* connections that are up. Could even
* go further and only look at connections
* which are S5_LOGGED_IN, but there may
* be statistics, such as connection time,
* which we'd like to have.
*/
queue_message_set(c->c_dataq, 0, msg_mgmt_rqst,
&mgmt_rqst);
msg_sent++;
}
}
(void) pthread_mutex_unlock(&port_mutex);
/*
* Comment: main.c:list_targets:1
* We wait for the responses without the port_mutex
* being held. There is a small window between when the
* connection last listens for a message and when the
* queue is freed. During that time the connection will
* attempt to grab the port_mutex lock so that it
* can unlink itself and call queueu_free(). If we sent
* the message with the lock held and then wait for a response
* it's possible that the connection will deadlock waiting
* to get the port_mutex.
*/
for (i = 0; i < msg_sent; i++) {
m = queue_message_get(q);
queue_message_free(m);
}
queue_free(q, NULL);
}
static void
send_named_msg(iscsi_conn_t *c, msg_type_t t, char *name)
{
target_queue_t *q = queue_alloc();
msg_t *m;
name_request_t n;
n.nr_q = q;
n.nr_name = name;
queue_message_set(c->c_sessq, 0, t, &n);
m = queue_message_get(q);
queue_message_free(m);
queue_free(q, NULL);
}
/*
* []----
* | sess_process -- handle messages from the connection(s)
* []----
*/
static void *
sess_process(void *v)
{
iscsi_sess_t *s = (iscsi_sess_t *)v;
iscsi_conn_t *c;
iscsi_cmd_t *cmd;
msg_t *m;
Boolean_t process = True;
mgmt_request_t *mgmt;
name_request_t *nr;
t10_cmd_t *t10_cmd;
char **buf,
local_buf[16];
int lun;
extern void dataout_callback(t10_cmd_t *t, char *data, size_t *xfer);
(void) pthread_mutex_lock(&s->s_mutex);
s->s_state = SS_RUNNING;
(void) pthread_mutex_unlock(&s->s_mutex);
do {
m = queue_message_get(s->s_sessq);
switch (m->msg_type) {
case msg_cmd_send:
cmd = (iscsi_cmd_t *)m->msg_data;
if (s->s_t10 == NULL) {
/*
* The value of 0x960 comes from T10.
* See SPC-4, revision 1a, section 6.4.2,
* table 87
*
* XXX Need to rethink how I should do
* the callback.
*/
s->s_t10 = t10_handle_create(s->s_t_name,
T10_TRANS_ISCSI, s->s_conn_head->c_tpgt,
s->s_conn_head->c_max_burst_len,
s->s_t10q, dataout_callback);
}
if (t10_cmd_create(s->s_t10, cmd->c_lun, cmd->c_scb,
cmd->c_scb_len, (transport_t)cmd,
&t10_cmd) == False) {
queue_prt(s->s_mgmtq, Q_SESS_ERRS,
"SES%x FAILED to create cmd", s->s_num);
/*
* If the command create failed, the T10 layer
* will attempt to create a sense buffer
* telling the initiator what went wrong. If
* that layer was unable to accomplish that
* things are really bad and we need to just
* close the connection.
*/
if (cmd->c_t10_cmd != NULL) {
queue_message_set(
cmd->c_allegiance->c_dataq,
0, msg_cmd_cmplt, t10_cmd);
} else
conn_state(cmd->c_allegiance, T11);
} else {
(void) pthread_mutex_lock(
&cmd->c_allegiance->c_mutex);
if (cmd->c_state != CmdCanceled) {
cmd->c_t10_cmd = t10_cmd;
(void) t10_cmd_send(s->s_t10,
cmd->c_t10_cmd, cmd->c_data,
cmd->c_data_len);
} else {
t10_cmd_state(t10_cmd,
T10_Cmd_Event_Canceled);
}
(void) pthread_mutex_unlock(
&cmd->c_allegiance->c_mutex);
}
break;
case msg_cmd_data_out:
cmd = (iscsi_cmd_t *)m->msg_data;
if (s->s_t10 != NULL)
(void) t10_cmd_data(s->s_t10, cmd->c_t10_cmd,
cmd->c_offset_out, cmd->c_data,
cmd->c_data_len);
break;
case msg_targ_inventory_change:
if (s->s_t10 != NULL)
(void) t10_task_mgmt(s->s_t10, InventoryChange,
0, 0);
break;
case msg_lu_capacity_change:
lun = (int)(uintptr_t)m->msg_data;
if (s->s_t10 != NULL)
(void) t10_task_mgmt(s->s_t10, CapacityChange,
lun, 0);
break;
case msg_reset_targ:
if (s->s_t10 != NULL)
(void) t10_task_mgmt(s->s_t10, ResetTarget,
0, 0);
break;
case msg_reset_lu:
if (s->s_t10 != NULL)
(void) t10_task_mgmt(s->s_t10, ResetLun,
(int)(uintptr_t)m->msg_data, 0);
break;
case msg_shutdown:
(void) pthread_mutex_lock(&s->s_mutex);
s->s_state = SS_SHUTDOWN_START;
(void) pthread_mutex_unlock(&s->s_mutex);
/*
* Shutdown rquest comming from a connection. Only
* shutdown the STE if this is the last connection
* for this session.
*/
c = (iscsi_conn_t *)m->msg_data;
if (session_remove_connection(s, c) == True) {
queue_prt(s->s_mgmtq, Q_SESS_NONIO,
"SES%x Starting shutdown", s->s_num);
/*
* If this is the last connection for this
* session send a message to the SAM-3 layer to
* shutdown.
*/
if (s->s_t10 != NULL) {
t10_handle_disable(s->s_t10);
}
queue_message_set(s->s_t10q, 0,
msg_shutdown_rsp, 0);
process = False;
} else {
/*
* Since this isn't the last connection for
* the session, acknowledge the connection
* request now since it's references from
* this session have been removed.
*/
queue_message_set(c->c_dataq, 0,
msg_shutdown_rsp, (void *)False);
}
break;
case msg_initiator_name:
nr = (name_request_t *)m->msg_data;
s->s_i_name = strdup(nr->nr_name);
/*
* Acknowledge the request by sending back an empty
* message.
*/
queue_message_set(nr->nr_q, 0, msg_initiator_name, 0);
break;
case msg_initiator_alias:
nr = (name_request_t *)m->msg_data;
s->s_i_alias = strdup(nr->nr_name);
/*
* Acknowledge the request by sending back an empty
* message.
*/
queue_message_set(nr->nr_q, 0, msg_initiator_alias, 0);
break;
case msg_target_name:
nr = (name_request_t *)m->msg_data;
s->s_t_name = strdup(nr->nr_name);
/*
* Acknowledge the request by sending back an empty
* message.
*/
queue_message_set(nr->nr_q, 0, msg_target_name, 0);
break;
case msg_mgmt_rqst:
mgmt = (mgmt_request_t *)m->msg_data;
m->msg_data = NULL;
(void) pthread_mutex_lock(&mgmt->m_resp_mutex);
buf = mgmt->m_u.m_resp;
if ((s->s_type == SessionNormal) &&
(mgmt->m_request == mgmt_full_phase_statistics) &&
(strcmp(s->s_t_name, mgmt->m_targ_name) == 0)) {
buf_add_tag(buf, XML_ELEMENT_CONN, Tag_Start);
buf_add_tag(buf, s->s_i_name, Tag_String);
if (s->s_i_alias != NULL) {
xml_add_tag(buf, XML_ELEMENT_ALIAS,
s->s_i_alias);
}
/*
* Need to loop through the connections
* and create one time_connected tag for
* each. This will be needed once MC/S support
* is added.
*/
(void) snprintf(local_buf, sizeof (local_buf),
"%d",
mgmt->m_time - s->s_conn_head->c_up_at);
xml_add_tag(buf, XML_ELEMENT_TIMECON,
local_buf);
buf_add_tag(buf, XML_ELEMENT_STATS, Tag_Start);
t10_targ_stat(s->s_t10, buf);
buf_add_tag(buf, XML_ELEMENT_STATS, Tag_End);
buf_add_tag(buf, XML_ELEMENT_CONN, Tag_End);
}
(void) pthread_mutex_unlock(&mgmt->m_resp_mutex);
queue_message_set(mgmt->m_q, 0, msg_mgmt_rply, 0);
break;
default:
queue_prt(s->s_mgmtq, Q_SESS_ERRS,
"SES%x Unknown msg type (%d) from Connection",
s->s_num, m->msg_type);
break;
}
queue_message_free(m);
} while (process == True);
return (NULL);
}
/*
* []----
* | sess_from_t10 -- handle messages from the T10 layer
* []----
*/
void *
sess_from_t10(void *v)
{
iscsi_sess_t *s = (iscsi_sess_t *)v;
msg_t *m;
Boolean_t process = True;
while (process == True) {
m = queue_message_get(s->s_t10q);
switch (m->msg_type) {
case msg_cmd_data_rqst:
queue_message_set(s->s_conn_head->c_dataq, 0,
msg_cmd_data_rqst, m->msg_data);
break;
case msg_cmd_data_in:
queue_message_set(s->s_conn_head->c_dataq, 0,
msg_cmd_data_in, m->msg_data);
break;
case msg_cmd_cmplt:
queue_message_set(s->s_conn_head->c_dataq, 0,
msg_cmd_cmplt, m->msg_data);
break;
case msg_shutdown_rsp:
if (s->s_t10) {
t10_handle_destroy(s->s_t10);
s->s_t10 = NULL;
}
(void) pthread_mutex_lock(&s->s_mutex);
s->s_state = SS_SHUTDOWN_CMPLT;
(void) pthread_mutex_unlock(&s->s_mutex);
session_free(s);
/*
* Let the connection, which is the last, know
* about our completion of the shutdown.
*/
queue_message_set(s->s_conn_head->c_dataq, 0,
msg_shutdown_rsp, (void *)True);
process = False;
s->s_state = SS_FREE;
break;
default:
queue_prt(s->s_mgmtq, Q_SESS_ERRS,
"SES%x Unknown msg type (%d) from T10 ",
s->s_num, m->msg_type);
queue_message_set(s->s_conn_head->c_dataq, 0,
m->msg_type, m->msg_data);
break;
}
queue_message_free(m);
}
queue_free(s->s_t10q, NULL);
util_title(s->s_mgmtq, Q_SESS_LOGIN, s->s_num, "End Session");
free(s);
return (NULL);
}
