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iser-target: Updates for login negotiation multi-plexing support 

This patch updates iser-target code to support login negotiation
multi-plexing.  This includes only using isert_conn->conn_login_comp
for the first login request PDU, pushing the subsequent processing
to iscsi_conn->login_work -> iscsi_target_do_login_rx(), and turning
isert_get_login_rx() into a NOP.

v3 changes:
   - Drop unnecessary LOGIN_FLAGS_READ_ACTIVE bit set in
     isert_rx_login_req()

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2013-08-18 16:35:46 -07:00
parent ea3a179abe
commit 6faaa85f37
1 changed files with 13 additions and 1 deletions
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14
drivers/infiniband/ulp/isert/ib_isert.c
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@ -869,7 +869,11 @@ isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
size, rx_buflen, MAX_KEY_VALUE_PAIRS);
memcpy(login->req_buf, &rx_desc->data[0], size);
complete(&isert_conn->conn_login_comp);
if (login->first_request) {
complete(&isert_conn->conn_login_comp);
return;
}
schedule_delayed_work(&conn->login_work, 0);
}
static void
@ -2224,6 +2228,14 @@ isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
int ret;
pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn);
/*
* For login requests after the first PDU, isert_rx_login_req() will
* kick schedule_delayed_work(&conn->login_work) as the packet is
* received, which turns this callback from iscsi_target_do_login_rx()
* into a NOP.
*/
if (!login->first_request)
return 0;
ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp);
if (ret)