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[SCSI] iscsi: add transport end point callbacks

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add transport end point callbacks so iscsi drivers that cannot connect
from userspace, like iscsi tcp, using sockets do not have to
implement their own socket infrastructure.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Or Gerlitz 2006-05-02 19:46:36 -05:00 committed by James Bottomley
parent 169e1a2a8a
commit 264faaaa12
4 changed files with 65 additions and 5 deletions
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4
drivers/scsi/iscsi_tcp.c
View File

@ -1975,7 +1975,7 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
static int
iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn, uint32_t transport_fd,
struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,
int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
@ -1985,7 +1985,7 @@ iscsi_tcp_conn_bind(struct iscsi_cls_session *cls_session,
int err;
/* lookup for existing socket */
sock = sockfd_lookup(transport_fd, &err);
sock = sockfd_lookup((int)transport_eph, &err);
if (!sock) {
printk(KERN_ERR "iscsi_tcp: sockfd_lookup failed %d\n", err);
return -EEXIST;

41
drivers/scsi/scsi_transport_iscsi.c
View File

@ -928,6 +928,40 @@ iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
return err;
}
static int
iscsi_if_transport_ep(struct iscsi_transport *transport,
struct iscsi_uevent *ev, int msg_type)
{
struct sockaddr *dst_addr;
int rc = 0;
switch (msg_type) {
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
if (!transport->ep_connect)
return -EINVAL;
dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
rc = transport->ep_connect(dst_addr,
ev->u.ep_connect.non_blocking,
&ev->r.ep_connect_ret.handle);
break;
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
if (!transport->ep_poll)
return -EINVAL;
ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle,
ev->u.ep_poll.timeout_ms);
break;
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
if (!transport->ep_disconnect)
return -EINVAL;
transport->ep_disconnect(ev->u.ep_disconnect.ep_handle);
break;
}
return rc;
}
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
@ -974,7 +1008,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (session && conn)
ev->r.retcode = transport->bind_conn(session, conn,
ev->u.b_conn.transport_fd,
ev->u.b_conn.transport_eph,
ev->u.b_conn.is_leading);
else
err = -EINVAL;
@ -1009,6 +1043,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case ISCSI_UEVENT_GET_STATS:
err = iscsi_if_get_stats(transport, nlh);
break;
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
break;
default:
err = -EINVAL;
break;

19
include/scsi/iscsi_if.h
View File

@ -43,6 +43,10 @@ enum iscsi_uevent_e {
ISCSI_UEVENT_GET_STATS = UEVENT_BASE + 10,
ISCSI_UEVENT_GET_PARAM = UEVENT_BASE + 11,
ISCSI_UEVENT_TRANSPORT_EP_CONNECT = UEVENT_BASE + 12,
ISCSI_UEVENT_TRANSPORT_EP_POLL = UEVENT_BASE + 13,
ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14,
/* up events */
ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
@ -69,7 +73,7 @@ struct iscsi_uevent {
struct msg_bind_conn {
uint32_t sid;
uint32_t cid;
uint32_t transport_fd;
uint64_t transport_eph;
uint32_t is_leading;
} b_conn;
struct msg_destroy_conn {
@ -102,6 +106,16 @@ struct iscsi_uevent {
uint32_t sid;
uint32_t cid;
} get_stats;
struct msg_transport_connect {
uint32_t non_blocking;
} ep_connect;
struct msg_transport_poll {
uint64_t ep_handle;
uint32_t timeout_ms;
} ep_poll;
struct msg_transport_disconnect {
uint64_t ep_handle;
} ep_disconnect;
} u;
union {
/* messages k -> u */
@ -124,6 +138,9 @@ struct iscsi_uevent {
uint32_t cid;
uint32_t error; /* enum iscsi_err */
} connerror;
struct msg_transport_connect_ret {
uint64_t handle;
} ep_connect_ret;
} r;
} __attribute__ ((aligned (sizeof(uint64_t))));

6
include/scsi/scsi_transport_iscsi.h
View File

@ -88,7 +88,7 @@ struct iscsi_transport {
uint32_t cid);
int (*bind_conn) (struct iscsi_cls_session *session,
struct iscsi_cls_conn *cls_conn,
uint32_t transport_fd, int is_leading);
uint64_t transport_eph, int is_leading);
int (*start_conn) (struct iscsi_cls_conn *conn);
void (*stop_conn) (struct iscsi_cls_conn *conn, int flag);
void (*destroy_conn) (struct iscsi_cls_conn *conn);
@ -119,6 +119,10 @@ struct iscsi_transport {
int (*xmit_mgmt_task) (struct iscsi_conn *conn,
struct iscsi_mgmt_task *mtask);
void (*session_recovery_timedout) (struct iscsi_cls_session *session);
int (*ep_connect) (struct sockaddr *dst_addr, int non_blocking,
uint64_t *ep_handle);
int (*ep_poll) (uint64_t ep_handle, int timeout_ms);
void (*ep_disconnect) (uint64_t ep_handle);
};
/*