Hey offload guys,
If we are using a offload card, then iface_set_param will match the
iface info to a scsi_host and pass that info down to setup the net
settings of the port (currently we just set the ip address). When we
create the tcp/ip connection by calling ep_connect, we currently just go
by the routing table info.
I think there are two problems with this.
1. Some drivers do not have access to a routing table. Some drivers like
qla4xxx do not even know about other ports.
2. If you have two initiator ports on the same subnet, the user may have
set things up so that session1 was supposed to be run through port1. and
session2 was supposed to be run through port2. It looks like we could
end with both sessions going through one of the ports.
Also how do you edit the routing table for the offload cards? You cannot
use normal net tools like route can you?
3. If we set up hostA in the iface_set_param step, but then the routing
info leads us to hostB, we are stuck.
I did the attached patches to fix this. Basically we just pass down the
scsi host we want to go through. Well, ok I began to fix this :) For
qla4xxx or serverengines I think this will work fine.
For bnx2i and cxgb3i, I am not sure. See the TODO and note in cxgb3i in
kern-ep-connect-through-host.patch. bnx2i guys, you guys do somehting
similar so will this work? In ep_connect can I control which host/port
to use?
The patches were made against my iscsi tress. The kernel one was made
over the iscsi brandh and that was just updated so you might want to
reclone.
The userspace one was made over the open-iscsi git tree head.
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diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c
b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 75223f5..ffbe0c7 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -517,7 +517,8 @@ iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn,
struct iscsi_stats *s
}
static struct iscsi_endpoint *
-iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking)
+iscsi_iser_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
+ int non_blocking)
{
int err;
struct iser_conn *ib_conn;
diff --git a/drivers/scsi/cxgb3i/cxgb3i.h b/drivers/scsi/cxgb3i/cxgb3i.h
index 59b0958..e3133b5 100644
--- a/drivers/scsi/cxgb3i/cxgb3i.h
+++ b/drivers/scsi/cxgb3i/cxgb3i.h
@@ -144,7 +144,6 @@ struct cxgb3i_adapter *cxgb3i_adapter_find_by_tdev(struct
t3cdev *);
void cxgb3i_adapter_open(struct t3cdev *);
void cxgb3i_adapter_close(struct t3cdev *);
-struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *);
struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *,
struct net_device *);
void cxgb3i_hba_host_remove(struct cxgb3i_hba *);
diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
index 9212400..f423c49 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c
@@ -178,7 +178,7 @@ void cxgb3i_adapter_close(struct t3cdev *t3dev)
* cxgb3i_hba_find_by_netdev - find the cxgb3i_hba structure via net_device
* @t3dev: t3cdev adapter
*/
-struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev)
+static struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev)
{
struct cxgb3i_adapter *snic;
int i;
@@ -261,12 +261,14 @@ void cxgb3i_hba_host_remove(struct cxgb3i_hba *hba)
/**
* cxgb3i_ep_connect - establish TCP connection to target portal
+ * @shost: scsi host to use
* @dst_addr: target IP address
* @non_blocking: blocking or non-blocking call
*
* Initiates a TCP/IP connection to the dst_addr
*/
-static struct iscsi_endpoint *cxgb3i_ep_connect(struct sockaddr *dst_addr,
+static struct iscsi_endpoint *cxgb3i_ep_connect(struct Scsi_Host *shost,
+ struct sockaddr *dst_addr,
int non_blocking)
{
struct iscsi_endpoint *ep;
@@ -275,6 +277,13 @@ static struct iscsi_endpoint *cxgb3i_ep_connect(struct
sockaddr *dst_addr,
struct s3_conn *c3cn = NULL;
int err = 0;
+ if (!shost) {
+ cxgb3i_log_error(Cannot connect. Missing host. Check that
+have the current iscsi tools.\n);
+ err = -EINVAL;
+ goto release_conn;
+ }
+
c3cn = cxgb3i_c3cn_create();
if (!c3cn) {
