[RFC-v3 3/9] iscsi-target: Initial traditional TCP conversion to iscsit_transport

Nicholas A. Bellinger
2013-04-04T07:38:16Z

This patch performs the initial conversion of existing traditional iscsi
to use iscsit_transport API callers. This includes:

- iscsi-np cleanups for iscsit_transport_type
- Add iscsi-np transport calls w/ ->iscsit_setup_up() and ->iscsit_free_np()
- Convert login thread process context to use ->iscsit_accept_np() for
connections with pre-allocated struct iscsi_conn
- Convert existing socket accept code to iscsit_accept_np()
- Convert login RX/TX callers to use ->iscsit_get_login_rx() and
->iscsit_put_login_tx() to exchange request/response PDUs
- Convert existing socket login RX/TX calls into iscsit_get_login_rx()
and iscsit_put_login_tx()
- Change iscsit_close_connection() to invoke ->iscsit_free_conn() +
iscsit_put_transport() calls.
- Add iscsit_register_transport() + iscsit_unregister_transport() calls
to module init/exit

v2 changes:

- Update module init/exit to use register_transport() + unregister_transport()

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---
drivers/target/iscsi/iscsi_target.c | 35 ++-
drivers/target/iscsi/iscsi_target_core.h | 15 +-
drivers/target/iscsi/iscsi_target_login.c | 414 ++++++++++++++++--------
drivers/target/iscsi/iscsi_target_login.h | 6 +
drivers/target/iscsi/iscsi_target_nego.c | 167 ++---------
drivers/target/iscsi/iscsi_target_nego.h | 11 +-
drivers/target/iscsi/iscsi_target_parameters.c | 12 +-
drivers/target/iscsi/iscsi_target_tpg.c | 6 +-
drivers/target/iscsi/iscsi_target_util.c | 27 +--
9 files changed, 378 insertions(+), 315 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 7ea246a..8203bf3 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -49,6 +49,8 @@
#include "iscsi_target_device.h"
#include "iscsi_target_stat.h"

+#include <target/iscsi/iscsi_transport.h>
+
static LIST_HEAD(g_tiqn_list);
static LIST_HEAD(g_np_list);
static DEFINE_SPINLOCK(tiqn_lock);
@@ -401,8 +403,7 @@ struct iscsi_np *iscsit_add_np(
spin_unlock_bh(&np_lock);

pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
- np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ?
- "TCP" : "SCTP");
+ np->np_ip, np->np_port, np->np_transport->name);

return np;
}
@@ -441,11 +442,10 @@ int iscsit_reset_np_thread(
return 0;
}

-static int iscsit_del_np_comm(struct iscsi_np *np)
+static void iscsit_free_np(struct iscsi_np *np)
{
if (np->np_socket)
sock_release(np->np_socket);
- return 0;
}

int iscsit_del_np(struct iscsi_np *np)
@@ -467,20 +467,32 @@ int iscsit_del_np(struct iscsi_np *np)
send_sig(SIGINT, np->np_thread, 1);
kthread_stop(np->np_thread);
}
- iscsit_del_np_comm(np);
+
+ np->np_transport->iscsit_free_np(np);

spin_lock_bh(&np_lock);
list_del(&np->np_list);
spin_unlock_bh(&np_lock);

pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
- np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ?
- "TCP" : "SCTP");
+ np->np_ip, np->np_port, np->np_transport->name);

+ iscsit_put_transport(np->np_transport);
kfree(np);
return 0;
}

+static struct iscsit_transport iscsi_target_transport = {
+ .name = "iSCSI/TCP",
+ .transport_type = ISCSI_TCP,
+ .owner = NULL,
+ .iscsit_setup_np = iscsit_setup_np,
+ .iscsit_accept_np = iscsit_accept_np,
+ .iscsit_free_np = iscsit_free_np,
+ .iscsit_get_login_rx = iscsit_get_login_rx,
+ .iscsit_put_login_tx = iscsit_put_login_tx,
+};
+
static int __init iscsi_target_init_module(void)
{
int ret = 0;
@@ -557,6 +569,8 @@ static int __init iscsi_target_init_module(void)
goto ooo_out;
}

+ iscsit_register_transport(&iscsi_target_transport);
+
if (iscsit_load_discovery_tpg() < 0)
goto r2t_out;

@@ -587,6 +601,7 @@ static void __exit iscsi_target_cleanup_module(void)
iscsi_deallocate_thread_sets();
iscsi_thread_set_free();
iscsit_release_discovery_tpg();
+ iscsit_unregister_transport(&iscsi_target_transport);
kmem_cache_destroy(lio_cmd_cache);
kmem_cache_destroy(lio_qr_cache);
kmem_cache_destroy(lio_dr_cache);
@@ -4053,6 +4068,12 @@ int iscsit_close_connection(

if (conn->sock)
sock_release(conn->sock);
+
+ if (conn->conn_transport->iscsit_free_conn)
+ conn->conn_transport->iscsit_free_conn(conn);
+
+ iscsit_put_transport(conn->conn_transport);
+
conn->thread_set = NULL;

pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 7a333d2..2587677 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -60,7 +60,7 @@

#define ISCSI_IOV_DATA_BUFFER 5

-enum tpg_np_network_transport_table {
+enum iscsit_transport_type {
ISCSI_TCP = 0,
ISCSI_SCTP_TCP = 1,
ISCSI_SCTP_UDP = 2,
@@ -503,6 +503,7 @@ struct iscsi_conn {
u16 login_port;
u16 local_port;
int net_size;
+ int login_family;
u32 auth_id;
u32 conn_flags;
/* Used for iscsi_tx_login_rsp() */
@@ -562,9 +563,12 @@ struct iscsi_conn {
struct list_head immed_queue_list;
struct list_head response_queue_list;
struct iscsi_conn_ops *conn_ops;
+ struct iscsi_login *conn_login;
+ struct iscsit_transport *conn_transport;
struct iscsi_param_list *param_list;
/* Used for per connection auth state machine */
void *auth_protocol;
+ void *context;
struct iscsi_login_thread_s *login_thread;
struct iscsi_portal_group *tpg;
/* Pointer to parent session */
@@ -663,6 +667,8 @@ struct iscsi_login {
u8 first_request;
u8 version_min;
u8 version_max;
+ u8 login_complete;
+ u8 login_failed;
char isid[6];
u32 cmd_sn;
itt_t init_task_tag;
@@ -670,10 +676,11 @@ struct iscsi_login {
u32 rsp_length;
u16 cid;
u16 tsih;
- char *req;
- char *rsp;
+ char req[ISCSI_HDR_LEN];
+ char rsp[ISCSI_HDR_LEN];
char *req_buf;
char *rsp_buf;
+ struct iscsi_conn *conn;
} ____cacheline_aligned;

struct iscsi_node_attrib {
@@ -754,6 +761,8 @@ struct iscsi_np {
struct task_struct *np_thread;
struct timer_list np_login_timer;
struct iscsi_portal_group *np_login_tpg;
+ void *np_context;
+ struct iscsit_transport *np_transport;
struct list_head np_list;
} ____cacheline_aligned;

diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 2535d4d..57f9dea 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -39,8 +39,39 @@
#include "iscsi_target.h"
#include "iscsi_target_parameters.h"

-static int iscsi_login_init_conn(struct iscsi_conn *conn)
+#include <target/iscsi/iscsi_transport.h>
+
+static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
{
+ struct iscsi_login *login;
+
+ login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
+ if (!login) {
+ pr_err("Unable to allocate memory for struct iscsi_login.\n");
+ return NULL;
+ }
+ login->conn = conn;
+ login->first_request = 1;
+
+ login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
+ if (!login->req_buf) {
+ pr_err("Unable to allocate memory for response buffer.\n");
+ goto out_login;
+ }
+
+ login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
+ if (!login->rsp_buf) {
+ pr_err("Unable to allocate memory for request buffer.\n");
+ goto out_req_buf;
+ }
+
+ conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
+ if (!conn->conn_ops) {
+ pr_err("Unable to allocate memory for"
+ " struct iscsi_conn_ops.\n");
+ goto out_rsp_buf;
+ }
+
init_waitqueue_head(&conn->queues_wq);
INIT_LIST_HEAD(&conn->conn_list);
INIT_LIST_HEAD(&conn->conn_cmd_list);
@@ -62,10 +93,21 @@ static int iscsi_login_init_conn(struct iscsi_conn *conn)

if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
pr_err("Unable to allocate conn->conn_cpumask\n");
- return -ENOMEM;
+ goto out_conn_ops;
}
+ conn->conn_login = login;

- return 0;
+ return login;
+
+out_conn_ops:
+ kfree(conn->conn_ops);
+out_rsp_buf:
+ kfree(login->rsp_buf);
+out_req_buf:
+ kfree(login->req_buf);
+out_login:
+ kfree(login);
+ return NULL;
}

/*
@@ -573,10 +615,13 @@ int iscsi_login_post_auth_non_zero_tsih(

static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
{
+#warning FIXME: Reenable iscsit_start_nopin_timer
+#if 0
struct iscsi_session *sess = conn->sess;

if (!sess->sess_ops->SessionType)
iscsit_start_nopin_timer(conn);
+#endif
}

static int iscsi_post_login_handler(
@@ -632,7 +677,13 @@ static int iscsi_post_login_handler(
spin_unlock_bh(&sess->conn_lock);

iscsi_post_login_start_timers(conn);
- iscsi_activate_thread_set(conn, ts);
+
+ if (conn->conn_transport == ISCSI_TCP) {
+ iscsi_activate_thread_set(conn, ts);
+ } else {
+ printk("Not calling iscsi_activate_thread_set....\n");
+ dump_stack();
+ }
/*
* Determine CPU mask to ensure connection's RX and TX kthreads
* are scheduled on the same CPU.
@@ -761,11 +812,11 @@ static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
spin_unlock_bh(&np->np_thread_lock);
}

-int iscsi_target_setup_login_socket(
+int iscsit_setup_np(
struct iscsi_np *np,
struct __kernel_sockaddr_storage *sockaddr)
{
- struct socket *sock;
+ struct socket *sock = NULL;
int backlog = 5, ret, opt = 0, len;

switch (np->np_network_transport) {
@@ -781,15 +832,15 @@ int iscsi_target_setup_login_socket(
np->np_ip_proto = IPPROTO_SCTP;
np->np_sock_type = SOCK_SEQPACKET;
break;
- case ISCSI_IWARP_TCP:
- case ISCSI_IWARP_SCTP:
- case ISCSI_INFINIBAND:
default:
pr_err("Unsupported network_transport: %d\n",
np->np_network_transport);
return -EINVAL;
}

+ np->np_ip_proto = IPPROTO_TCP;
+ np->np_sock_type = SOCK_STREAM;
+
ret = sock_create(sockaddr->ss_family, np->np_sock_type,
np->np_ip_proto, &sock);
if (ret < 0) {
@@ -853,7 +904,6 @@ int iscsi_target_setup_login_socket(
}

return 0;
-
fail:
np->np_socket = NULL;
if (sock)
@@ -861,21 +911,168 @@ fail:
return ret;
}

+int iscsi_target_setup_login_socket(
+ struct iscsi_np *np,
+ struct __kernel_sockaddr_storage *sockaddr)
+{
+ struct iscsit_transport *t;
+ int rc;
+
+ t = iscsit_get_transport(np->np_network_transport);
+ if (!t)
+ return -EINVAL;
+
+ rc = t->iscsit_setup_np(np, sockaddr);
+ if (rc < 0)
+ return rc;
+
+ np->np_transport = t;
+ printk("Set np->np_transport to %p -> %s\n", np->np_transport,
+ np->np_transport->name);
+ return 0;
+}
+
+int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
+{
+ struct socket *new_sock, *sock = np->np_socket;
+ struct sockaddr_in sock_in;
+ struct sockaddr_in6 sock_in6;
+ int rc, err;
+
+ rc = kernel_accept(sock, &new_sock, 0);
+ if (rc < 0)
+ return rc;
+
+ conn->sock = new_sock;
+ conn->login_family = np->np_sockaddr.ss_family;
+ printk("iSCSI/TCP: Setup conn->sock from new_sock: %p\n", new_sock);
+
+ if (np->np_sockaddr.ss_family == AF_INET6) {
+ memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
+
+ rc = conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in6, &err, 1);
+ if (!rc) {
+ snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
+ &sock_in6.sin6_addr.in6_u);
+ conn->login_port = ntohs(sock_in6.sin6_port);
+ }
+
+ rc = conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in6, &err, 0);
+ if (!rc) {
+ snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
+ &sock_in6.sin6_addr.in6_u);
+ conn->local_port = ntohs(sock_in6.sin6_port);
+ }
+ } else {
+ memset(&sock_in, 0, sizeof(struct sockaddr_in));
+
+ rc = conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in, &err, 1);
+ if (!rc) {
+ sprintf(conn->login_ip, "%pI4",
+ &sock_in.sin_addr.s_addr);
+ conn->login_port = ntohs(sock_in.sin_port);
+ }
+
+ rc = conn->sock->ops->getname(conn->sock,
+ (struct sockaddr *)&sock_in, &err, 0);
+ if (!rc) {
+ sprintf(conn->local_ip, "%pI4",
+ &sock_in.sin_addr.s_addr);
+ conn->local_port = ntohs(sock_in.sin_port);
+ }
+ }
+
+ return 0;
+}
+
+int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
+{
+ struct iscsi_login_req *login_req;
+ u32 padding = 0, payload_length;
+
+ if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
+ return -1;
+
+ login_req = (struct iscsi_login_req *)login->req;
+ payload_length = ntoh24(login_req->dlength);
+ padding = ((-payload_length) & 3);
+
+ pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
+ " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
+ login_req->flags, login_req->itt, login_req->cmdsn,
+ login_req->exp_statsn, login_req->cid, payload_length);
+ /*
+ * Setup the initial iscsi_login values from the leading
+ * login request PDU.
+ */
+ if (login->first_request) {
+ login_req = (struct iscsi_login_req *)login->req;
+ login->leading_connection = (!login_req->tsih) ? 1 : 0;
+ login->current_stage =
+ (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
+ login->version_min = login_req->min_version;
+ login->version_max = login_req->max_version;
+ memcpy(login->isid, login_req->isid, 6);
+ login->cmd_sn = be32_to_cpu(login_req->cmdsn);
+ login->init_task_tag = login_req->itt;
+ login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn);
+ login->cid = be16_to_cpu(login_req->cid);
+ login->tsih = be16_to_cpu(login_req->tsih);
+ }
+
+ if (iscsi_target_check_login_request(conn, login) < 0)
+ return -1;
+
+ memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
+ if (iscsi_login_rx_data(conn, login->req_buf,
+ payload_length + padding) < 0)
+ return -1;
+
+ return 0;
+}
+
+int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
+ u32 length)
+{
+ if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int
+iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t)
+{
+ int rc;
+
+ if (!t->owner) {
+ conn->conn_transport = t;
+ return 0;
+ }
+
+ rc = try_module_get(t->owner);
+ if (!rc) {
+ pr_err("try_module_get() failed for %s\n", t->name);
+ return -EINVAL;
+ }
+
+ conn->conn_transport = t;
+ return 0;
+}
+
static int __iscsi_target_login_thread(struct iscsi_np *np)
{
- u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0;
- int err, ret = 0, stop;
+ u8 *buffer, zero_tsih = 0;
+ int ret = 0, rc, stop;
struct iscsi_conn *conn = NULL;
struct iscsi_login *login;
struct iscsi_portal_group *tpg = NULL;
- struct socket *new_sock, *sock;
- struct kvec iov;
struct iscsi_login_req *pdu;
- struct sockaddr_in sock_in;
- struct sockaddr_in6 sock_in6;

flush_signals(current);
- sock = np->np_socket;

spin_lock_bh(&np->np_thread_lock);
if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
@@ -886,75 +1083,76 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
}
spin_unlock_bh(&np->np_thread_lock);

- if (kernel_accept(sock, &new_sock, 0) < 0) {
- spin_lock_bh(&np->np_thread_lock);
- if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
- spin_unlock_bh(&np->np_thread_lock);
- complete(&np->np_restart_comp);
- /* Get another socket */
- return 1;
- }
- spin_unlock_bh(&np->np_thread_lock);
- goto out;
- }
- iscsi_start_login_thread_timer(np);
-
conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
if (!conn) {
pr_err("Could not allocate memory for"
" new connection\n");
- sock_release(new_sock);
/* Get another socket */
return 1;
}
-
pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
conn->conn_state = TARG_CONN_STATE_FREE;
- conn->sock = new_sock;

- pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
- conn->conn_state = TARG_CONN_STATE_XPT_UP;
+ if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
+ kfree(conn);
+ return 1;
+ }

- /*
- * Allocate conn->conn_ops early as a failure calling
- * iscsit_tx_login_rsp() below will call tx_data().
- */
- conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
- if (!conn->conn_ops) {
- pr_err("Unable to allocate memory for"
- " struct iscsi_conn_ops.\n");
- goto new_sess_out;
+ rc = np->np_transport->iscsit_accept_np(np, conn);
+ if (rc == -ENOSYS) {
+ complete(&np->np_restart_comp);
+ iscsit_put_transport(conn->conn_transport);
+ kfree(conn);
+ conn = NULL;
+ goto exit;
+ } else if (rc < 0) {
+ spin_lock_bh(&np->np_thread_lock);
+ if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
+ spin_unlock_bh(&np->np_thread_lock);
+ complete(&np->np_restart_comp);
+ if (ret == -ENODEV) {
+ iscsit_put_transport(conn->conn_transport);
+ kfree(conn);
+ conn = NULL;
+ goto out;
+ }
+ /* Get another socket */
+ return 1;
+ }
+ spin_unlock_bh(&np->np_thread_lock);
+ iscsit_put_transport(conn->conn_transport);
+ kfree(conn);
+ conn = NULL;
+ goto out;
}
/*
* Perform the remaining iSCSI connection initialization items..
*/
- if (iscsi_login_init_conn(conn) < 0)
- goto new_sess_out;
-
- memset(buffer, 0, ISCSI_HDR_LEN);
- memset(&iov, 0, sizeof(struct kvec));
- iov.iov_base = buffer;
- iov.iov_len = ISCSI_HDR_LEN;
-
- if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) {
- pr_err("rx_data() returned an error.\n");
+ login = iscsi_login_init_conn(conn);
+ if (!login) {
goto new_sess_out;
}

- iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK);
- if (!(iscsi_opcode & ISCSI_OP_LOGIN)) {
- pr_err("First opcode is not login request,"
- " failing login request.\n");
- goto new_sess_out;
- }
+ iscsi_start_login_thread_timer(np);

- pdu = (struct iscsi_login_req *) buffer;
+ pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
+ conn->conn_state = TARG_CONN_STATE_XPT_UP;
+ /*
+ * This will process the first login request + payload..
+ */
+ rc = np->np_transport->iscsit_get_login_rx(conn, login);
+ if (rc == 1)
+ return 1;
+ else if (rc < 0)
+ goto new_sess_out;

+ buffer = &login->req[0];
+ pdu = (struct iscsi_login_req *)buffer;
/*
* Used by iscsit_tx_login_rsp() for Login Resonses PDUs
* when Status-Class != 0.
*/
- conn->login_itt = pdu->itt;
+ conn->login_itt = pdu->itt;

spin_lock_bh(&np->np_thread_lock);
if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
@@ -967,61 +1165,11 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
}
spin_unlock_bh(&np->np_thread_lock);

- if (np->np_sockaddr.ss_family == AF_INET6) {
- memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
-
- if (conn->sock->ops->getname(conn->sock,
- (struct sockaddr *)&sock_in6, &err, 1) < 0) {
- pr_err("sock_ops->getname() failed.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_TARGET_ERROR);
- goto new_sess_out;
- }
- snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
- &sock_in6.sin6_addr.in6_u);
- conn->login_port = ntohs(sock_in6.sin6_port);
-
- if (conn->sock->ops->getname(conn->sock,
- (struct sockaddr *)&sock_in6, &err, 0) < 0) {
- pr_err("sock_ops->getname() failed.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_TARGET_ERROR);
- goto new_sess_out;
- }
- snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
- &sock_in6.sin6_addr.in6_u);
- conn->local_port = ntohs(sock_in6.sin6_port);
-
- } else {
- memset(&sock_in, 0, sizeof(struct sockaddr_in));
-
- if (conn->sock->ops->getname(conn->sock,
- (struct sockaddr *)&sock_in, &err, 1) < 0) {
- pr_err("sock_ops->getname() failed.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_TARGET_ERROR);
- goto new_sess_out;
- }
- sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr);
- conn->login_port = ntohs(sock_in.sin_port);
-
- if (conn->sock->ops->getname(conn->sock,
- (struct sockaddr *)&sock_in, &err, 0) < 0) {
- pr_err("sock_ops->getname() failed.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_TARGET_ERROR);
- goto new_sess_out;
- }
- sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr);
- conn->local_port = ntohs(sock_in.sin_port);
- }
-
conn->network_transport = np->np_network_transport;

pr_debug("Received iSCSI login request from %s on %s Network"
- " Portal %s:%hu\n", conn->login_ip,
- (conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP",
- conn->local_ip, conn->local_port);
+ " Portal %s:%hu\n", conn->login_ip, np->np_transport->name,
+ conn->local_ip, conn->local_port);

pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
@@ -1050,13 +1198,17 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
goto new_sess_out;
}
-
/*
- * This will process the first login request, and call
- * iscsi_target_locate_portal(), and return a valid struct iscsi_login.
+ * SessionType: Discovery
+ *
+ * Locates Default Portal
+ *
+ * SessionType: Normal
+ *
+ * Locates Target Portal from NP -> Target IQN
*/
- login = iscsi_target_init_negotiation(np, conn, buffer);
- if (!login) {
+ rc = iscsi_target_locate_portal(np, conn, login);
+ if (rc < 0) {
tpg = conn->tpg;
goto new_sess_out;
}
@@ -1068,15 +1220,11 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
}

if (zero_tsih) {
- if (iscsi_login_zero_tsih_s2(conn) < 0) {
- iscsi_target_nego_release(login, conn);
+ if (iscsi_login_zero_tsih_s2(conn) < 0)
goto new_sess_out;
- }
} else {
- if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) {
- iscsi_target_nego_release(login, conn);
+ if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0)
goto old_sess_out;
- }
}

if (iscsi_target_start_negotiation(login, conn) < 0)
@@ -1153,8 +1301,18 @@ old_sess_out:
iscsi_release_param_list(conn->param_list);
conn->param_list = NULL;
}
- if (conn->sock)
+ iscsi_target_nego_release(conn);
+
+ if (conn->sock) {
sock_release(conn->sock);
+ conn->sock = NULL;
+ }
+
+ if (conn->conn_transport->iscsit_free_conn)
+ conn->conn_transport->iscsit_free_conn(conn);
+
+ iscsit_put_transport(conn->conn_transport);
+
kfree(conn);

if (tpg) {
@@ -1172,11 +1330,13 @@ out:
/* Wait for another socket.. */
if (!stop)
return 1;
-
+exit:
iscsi_stop_login_thread_timer(np);
spin_lock_bh(&np->np_thread_lock);
np->np_thread_state = ISCSI_NP_THREAD_EXIT;
+ np->np_thread = NULL;
spin_unlock_bh(&np->np_thread_lock);
+
return 0;
}

diff --git a/drivers/target/iscsi/iscsi_target_login.h b/drivers/target/iscsi/iscsi_target_login.h
index 091dcae..63efd28 100644
--- a/drivers/target/iscsi/iscsi_target_login.h
+++ b/drivers/target/iscsi/iscsi_target_login.h
@@ -4,8 +4,14 @@
extern int iscsi_login_setup_crypto(struct iscsi_conn *);
extern int iscsi_check_for_session_reinstatement(struct iscsi_conn *);
extern int iscsi_login_post_auth_non_zero_tsih(struct iscsi_conn *, u16, u32);
+extern int iscsit_setup_np(struct iscsi_np *,
+ struct __kernel_sockaddr_storage *);
extern int iscsi_target_setup_login_socket(struct iscsi_np *,
struct __kernel_sockaddr_storage *);
+extern int iscsit_accept_np(struct iscsi_np *, struct iscsi_conn *);
+extern int iscsit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
+extern int iscsit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
+extern void iscsit_free_conn(struct iscsi_np *, struct iscsi_conn *);
extern int iscsi_target_login_thread(void *);
extern int iscsi_login_disable_FIM_keys(struct iscsi_param_list *, struct iscsi_conn *);

diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index 3cbdccd..879a0cb 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -22,6 +22,7 @@
#include <scsi/iscsi_proto.h>
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
+#include <target/iscsi/iscsi_transport.h>

#include "iscsi_target_core.h"
#include "iscsi_target_parameters.h"
@@ -169,7 +170,7 @@ static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn)
kfree(conn->auth_protocol);
}

-static int iscsi_target_check_login_request(
+int iscsi_target_check_login_request(
struct iscsi_conn *conn,
struct iscsi_login *login)
{
@@ -352,11 +353,8 @@ static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_log

padding = ((-login->rsp_length) & 3);

- if (iscsi_login_tx_data(
- conn,
- login->rsp,
- login->rsp_buf,
- login->rsp_length + padding) < 0)
+ if (conn->conn_transport->iscsit_put_login_tx(conn, login,
+ login->rsp_length + padding) < 0)
return -1;

login->rsp_length = 0;
@@ -368,72 +366,12 @@ static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_log
return 0;
}

-static int iscsi_target_do_rx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
-{
- u32 padding = 0, payload_length;
- struct iscsi_login_req *login_req;
-
- if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
- return -1;
-
- login_req = (struct iscsi_login_req *) login->req;
- payload_length = ntoh24(login_req->dlength);
-
- pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
- " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
- login_req->flags, login_req->itt, login_req->cmdsn,
- login_req->exp_statsn, login_req->cid, payload_length);
-
- if (iscsi_target_check_login_request(conn, login) < 0)
- return -1;
-
- padding = ((-payload_length) & 3);
- memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
-
- if (iscsi_login_rx_data(
- conn,
- login->req_buf,
- payload_length + padding) < 0)
- return -1;
-
- return 0;
-}
-
static int iscsi_target_do_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
{
if (iscsi_target_do_tx_login_io(conn, login) < 0)
return -1;

- if (iscsi_target_do_rx_login_io(conn, login) < 0)
- return -1;
-
- return 0;
-}
-
-static int iscsi_target_get_initial_payload(
- struct iscsi_conn *conn,
- struct iscsi_login *login)
-{
- u32 padding = 0, payload_length;
- struct iscsi_login_req *login_req;
-
- login_req = (struct iscsi_login_req *) login->req;
- payload_length = ntoh24(login_req->dlength);
-
- pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
- " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
- login_req->flags, login_req->itt, login_req->cmdsn,
- login_req->exp_statsn, payload_length);
-
- if (iscsi_target_check_login_request(conn, login) < 0)
- return -1;
-
- padding = ((-payload_length) & 3);
-
- if (iscsi_login_rx_data(
- conn,
- login->req_buf,
- payload_length + padding) < 0)
+ if (conn->conn_transport->iscsit_get_login_rx(conn, login) < 0)
return -1;

return 0;
@@ -693,6 +631,7 @@ static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *lo
return -1;
if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
login->tsih = conn->sess->tsih;
+ login->login_complete = 1;
if (iscsi_target_do_tx_login_io(conn,
login) < 0)
return -1;
@@ -736,7 +675,7 @@ static void iscsi_initiatorname_tolower(
/*
* Processes the first Login Request..
*/
-static int iscsi_target_locate_portal(
+int iscsi_target_locate_portal(
struct iscsi_np *np,
struct iscsi_conn *conn,
struct iscsi_login *login)
@@ -798,6 +737,8 @@ static int iscsi_target_locate_portal(
start += strlen(key) + strlen(value) + 2;
}

+ printk("i_buf: %s, s_buf: %s, t_buf: %s\n", i_buf, s_buf, t_buf);
+
/*
* See 5.3. Login Phase.
*/
@@ -956,100 +897,30 @@ out:
return ret;
}

-struct iscsi_login *iscsi_target_init_negotiation(
- struct iscsi_np *np,
- struct iscsi_conn *conn,
- char *login_pdu)
-{
- struct iscsi_login *login;
-
- login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
- if (!login) {
- pr_err("Unable to allocate memory for struct iscsi_login.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_NO_RESOURCES);
- return NULL;
- }
-
- login->req = kmemdup(login_pdu, ISCSI_HDR_LEN, GFP_KERNEL);
- if (!login->req) {
- pr_err("Unable to allocate memory for Login Request.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_NO_RESOURCES);
- goto out;
- }
-
- login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
- if (!login->req_buf) {
- pr_err("Unable to allocate memory for response buffer.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_NO_RESOURCES);
- goto out;
- }
- /*
- * SessionType: Discovery
- *
- * Locates Default Portal
- *
- * SessionType: Normal
- *
- * Locates Target Portal from NP -> Target IQN
- */
- if (iscsi_target_locate_portal(np, conn, login) < 0) {
- goto out;
- }
-
- return login;
-out:
- kfree(login->req);
- kfree(login->req_buf);
- kfree(login);
-
- return NULL;
-}
-
int iscsi_target_start_negotiation(
struct iscsi_login *login,
struct iscsi_conn *conn)
{
- int ret = -1;
-
- login->rsp = kzalloc(ISCSI_HDR_LEN, GFP_KERNEL);
- if (!login->rsp) {
- pr_err("Unable to allocate memory for"
- " Login Response.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_NO_RESOURCES);
- ret = -1;
- goto out;
- }
-
- login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
- if (!login->rsp_buf) {
- pr_err("Unable to allocate memory for"
- " request buffer.\n");
- iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
- ISCSI_LOGIN_STATUS_NO_RESOURCES);
- ret = -1;
- goto out;
- }
+ int ret;

ret = iscsi_target_do_login(conn, login);
-out:
if (ret != 0)
iscsi_remove_failed_auth_entry(conn);

- iscsi_target_nego_release(login, conn);
+ iscsi_target_nego_release(conn);
return ret;
}

-void iscsi_target_nego_release(
- struct iscsi_login *login,
- struct iscsi_conn *conn)
+void iscsi_target_nego_release(struct iscsi_conn *conn)
{
- kfree(login->req);
- kfree(login->rsp);
+ struct iscsi_login *login = conn->conn_login;
+
+ if (!login)
+ return;
+
kfree(login->req_buf);
kfree(login->rsp_buf);
kfree(login);
+
+ conn->conn_login = NULL;
}
diff --git a/drivers/target/iscsi/iscsi_target_nego.h b/drivers/target/iscsi/iscsi_target_nego.h
index 92e133a..f021cbd 100644
--- a/drivers/target/iscsi/iscsi_target_nego.h
+++ b/drivers/target/iscsi/iscsi_target_nego.h
@@ -7,11 +7,14 @@
extern void convert_null_to_semi(char *, int);
extern int extract_param(const char *, const char *, unsigned int, char *,
unsigned char *);
-extern struct iscsi_login *iscsi_target_init_negotiation(
- struct iscsi_np *, struct iscsi_conn *, char *);
+extern int iscsi_target_check_login_request(struct iscsi_conn *,
+ struct iscsi_login *);
+extern int iscsi_target_get_initial_payload(struct iscsi_conn *,
+ struct iscsi_login *);
+extern int iscsi_target_locate_portal(struct iscsi_np *, struct iscsi_conn *,
+ struct iscsi_login *);
extern int iscsi_target_start_negotiation(
struct iscsi_login *, struct iscsi_conn *);
-extern void iscsi_target_nego_release(
- struct iscsi_login *, struct iscsi_conn *);
+extern void iscsi_target_nego_release(struct iscsi_conn *);

#endif /* ISCSI_TARGET_NEGO_H */
diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index ca2be40..84ce94a 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -59,7 +59,7 @@ int iscsi_login_tx_data(
char *text_buf,
int text_length)
{
- int length, tx_sent;
+ int length, tx_sent, iov_cnt = 1;
struct kvec iov[2];

length = (ISCSI_HDR_LEN + text_length);
@@ -67,8 +67,12 @@ int iscsi_login_tx_data(
memset(&iov[0], 0, 2 * sizeof(struct kvec));
iov[0].iov_len = ISCSI_HDR_LEN;
iov[0].iov_base = pdu_buf;
- iov[1].iov_len = text_length;
- iov[1].iov_base = text_buf;
+
+ if (text_buf && text_length) {
+ iov[1].iov_len = text_length;
+ iov[1].iov_base = text_buf;
+ iov_cnt++;
+ }

/*
* Initial Marker-less Interval.
@@ -77,7 +81,7 @@ int iscsi_login_tx_data(
*/
conn->if_marker += length;

- tx_sent = tx_data(conn, &iov[0], 2, length);
+ tx_sent = tx_data(conn, &iov[0], iov_cnt, length);
if (tx_sent != length) {
pr_err("tx_data returned %d, expecting %d.\n",
tx_sent, length);
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index ee8f8c6..439260b 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -31,6 +31,8 @@
#include "iscsi_target.h"
#include "iscsi_target_parameters.h"

+#include <target/iscsi/iscsi_transport.h>
+
struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
{
struct iscsi_portal_group *tpg;
@@ -508,7 +510,7 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(

pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
- (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
+ np->np_transport->name);

return tpg_np;
}
@@ -522,7 +524,7 @@ static int iscsit_tpg_release_np(

pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
- (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
+ np->np_transport->name);

tpg_np->tpg_np = NULL;
tpg_np->tpg = NULL;
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 7ce3505..4cf1e7f 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -24,6 +24,7 @@
#include <target/target_core_base.h>
#include <target/target_core_fabric.h>
#include <target/target_core_configfs.h>
+#include <target/iscsi/iscsi_transport.h>

#include "iscsi_target_core.h"
#include "iscsi_target_parameters.h"
@@ -1226,34 +1227,19 @@ send_datacrc:
*/
int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
{
- u8 iscsi_hdr[ISCSI_HDR_LEN];
- int err;
- struct kvec iov;
struct iscsi_login_rsp *hdr;
+ struct iscsi_login *login = conn->conn_login;

+ login->login_failed = 1;
iscsit_collect_login_stats(conn, status_class, status_detail);

- memset(&iov, 0, sizeof(struct kvec));
- memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN);
-
- hdr = (struct iscsi_login_rsp *)&iscsi_hdr;
+ hdr = (struct iscsi_login_rsp *)&login->rsp[0];
hdr->opcode = ISCSI_OP_LOGIN_RSP;
hdr->status_class = status_class;
hdr->status_detail = status_detail;
hdr->itt = conn->login_itt;

- iov.iov_base = &iscsi_hdr;
- iov.iov_len = ISCSI_HDR_LEN;
-
- PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN);
-
- err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN);
- if (err != ISCSI_HDR_LEN) {
- pr_err("tx_data returned less than expected\n");
- return -1;
- }
-
- return 0;
+ return conn->conn_transport->iscsit_put_login_tx(conn, login, 0);
}

void iscsit_print_session_params(struct iscsi_session *sess)
@@ -1432,7 +1418,8 @@ void iscsit_collect_login_stats(
strcpy(ls->last_intr_fail_name,
(intrname ? intrname->value : "Unknown"));

- ls->last_intr_fail_ip_family = conn->sock->sk->sk_family;
+ ls->last_intr_fail_ip_family = conn->login_family;
+
snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE,
"%s", conn->login_ip);
ls->last_fail_time = get_jiffies_64();
--
1.7.2.5