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[SCSI] bnx2i: Modified the bnx2i stop path to compensate for in progress ops 

The stop path has been augmented to wait a max of 10s for all in
progress offload and destroy activities to complete before proceeding
to terminate all active connections (via iscsid or forcefully).

Note that any new offload and destroy requests are now blocked and
return to the caller immediately.

Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Acked-by: Anil Veerabhadrappa <anilgv@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Eddie Wai 2010-11-23 15:29:28 -08:00 committed by James Bottomley
parent 016ef69076
commit 842158d7b7
2 changed files with 23 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/scsi/bnx2i/bnx2i_init.c
View File

@ -209,13 +209,24 @@ void bnx2i_stop(void *handle)
{
struct bnx2i_hba *hba = handle;
int conns_active;
int wait_delay = 1 * HZ;
/* check if cleanup happened in GOING_DOWN context */
if (!test_and_clear_bit(ADAPTER_STATE_GOING_DOWN,
&hba->adapter_state))
if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN,
&hba->adapter_state)) {
iscsi_host_for_each_session(hba->shost,
bnx2i_drop_session);
wait_delay = hba->hba_shutdown_tmo;
}
/* Wait for inflight offload connection tasks to complete before
* proceeding. Forcefully terminate all connection recovery in
* progress at the earliest, either in bind(), send_pdu(LOGIN),
* or conn_start()
*/
wait_event_interruptible_timeout(hba->eh_wait,
(list_empty(&hba->ep_ofld_list) &&
list_empty(&hba->ep_destroy_list)),
10 * HZ);
/* Wait for all endpoints to be torn down, Chip will be reset once
* control returns to network driver. So it is required to cleanup and
* release all connection resources before returning from this routine.
@ -224,7 +235,7 @@ void bnx2i_stop(void *handle)
conns_active = hba->ofld_conns_active;
wait_event_interruptible_timeout(hba->eh_wait,
(hba->ofld_conns_active != conns_active),
hba->hba_shutdown_tmo);
wait_delay);
if (hba->ofld_conns_active == conns_active)
break;
}
@ -233,9 +244,11 @@ void bnx2i_stop(void *handle)
/* This flag should be cleared last so that ep_disconnect() gracefully
* cleans up connection context
*/
clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
}
/**
* bnx2i_init_one - initialize an adapter instance and allocate memory resources
* @hba: bnx2i adapter instance

7
drivers/scsi/bnx2i/bnx2i_iscsi.c
View File

@ -1383,6 +1383,12 @@ static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
ep = iscsi_lookup_endpoint(transport_fd);
if (!ep)
return -EINVAL;
/*
* Forcefully terminate all in progress connection recovery at the
* earliest, either in bind(), send_pdu(LOGIN), or conn_start()
*/
if (bnx2i_adapter_ready(hba))
return -EIO;
bnx2i_ep = ep->dd_data;
if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
@ -1404,7 +1410,6 @@ static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
hba->netdev->name);
return -EEXIST;
}
bnx2i_ep->conn = bnx2i_conn;
bnx2i_conn->ep = bnx2i_ep;
bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;