/*
* Allocate session and enter it in the hash for the local port.
* Caller holds ft_lport_lock.
*/
static struct ft_sess *ft_sess_create(struct ft_tport *tport, u32 port_id,
struct ft_node_acl *acl)
{
struct ft_sess *sess;
struct hlist_head *head;
struct hlist_node *pos;
head = &tport->hash[ft_sess_hash(port_id)];
hlist_for_each_entry_rcu(sess, pos, head, hash)
if (sess->port_id == port_id)
return sess;
sess = kzalloc(sizeof(*sess), GFP_KERNEL);
if (!sess)
return NULL;
sess->se_sess = transport_init_session();
if (IS_ERR(sess->se_sess)) {
kfree(sess);
return NULL;
}
sess->se_sess->se_node_acl = &acl->se_node_acl;
sess->tport = tport;
sess->port_id = port_id;
kref_init(&sess->kref); /* ref for table entry */
hlist_add_head_rcu(&sess->hash, head);
tport->sess_count++;
pr_debug("port_id %x sess %p\n", port_id, sess);
transport_register_session(&tport->tpg->se_tpg, &acl->se_node_acl,
sess->se_sess, sess);
return sess;
}
static int tcm_loop_make_nexus(
struct tcm_loop_tpg *tl_tpg,
const char *name)
{
struct se_portal_group *se_tpg;
struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
struct tcm_loop_nexus *tl_nexus;
int ret = -ENOMEM;
if (tl_tpg->tl_nexus) {
pr_debug("tl_tpg->tl_nexus already exists\n");
return -EEXIST;
}
se_tpg = &tl_tpg->tl_se_tpg;
tl_nexus = kzalloc(sizeof(struct tcm_loop_nexus), GFP_KERNEL);
if (!tl_nexus) {
pr_err("Unable to allocate struct tcm_loop_nexus\n");
return -ENOMEM;
}
/*
* Initialize the struct se_session pointer
*/
tl_nexus->se_sess = transport_init_session(
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS);
if (IS_ERR(tl_nexus->se_sess)) {
ret = PTR_ERR(tl_nexus->se_sess);
goto out;
}
/*
* Since we are running in 'demo mode' this call with generate a
* struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI
* Initiator port name of the passed configfs group 'name'.
*/
tl_nexus->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
se_tpg, (unsigned char *)name);
if (!tl_nexus->se_sess->se_node_acl) {
transport_free_session(tl_nexus->se_sess);
goto out;
}
/* Now, register the I_T Nexus as active. */
transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
tl_nexus->se_sess, tl_nexus);
tl_tpg->tl_nexus = tl_nexus;
pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
" %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
name);
return 0;
out:
kfree(tl_nexus);
return ret;
}
