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path: root/drivers/scsi/scsi_transport_iscsi.c
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Diffstat (limited to 'drivers/scsi/scsi_transport_iscsi.c')
-rw-r--r--drivers/scsi/scsi_transport_iscsi.c175
1 files changed, 127 insertions, 48 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 094795455293..f3e664628d7a 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -37,7 +37,6 @@
#define ISCSI_TRANSPORT_VERSION "2.0-870"
struct iscsi_internal {
- int daemon_pid;
struct scsi_transport_template t;
struct iscsi_transport *iscsi_transport;
struct list_head list;
@@ -357,7 +356,7 @@ int iscsi_session_chkready(struct iscsi_cls_session *session)
err = 0;
break;
case ISCSI_SESSION_FAILED:
- err = DID_TRANSPORT_DISRUPTED << 16;
+ err = DID_IMM_RETRY << 16;
break;
case ISCSI_SESSION_FREE:
err = DID_TRANSPORT_FAILFAST << 16;
@@ -938,23 +937,9 @@ iscsi_if_transport_lookup(struct iscsi_transport *tt)
}
static int
-iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp)
+iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
{
- return netlink_broadcast(nls, skb, 0, 1, gfp);
-}
-
-static int
-iscsi_unicast_skb(struct sk_buff *skb, int pid)
-{
- int rc;
-
- rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
- if (rc < 0) {
- printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc);
- return rc;
- }
-
- return 0;
+ return nlmsg_multicast(nls, skb, 0, group, gfp);
}
int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
@@ -980,7 +965,7 @@ int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
memset(ev, 0, sizeof(*ev));
ev->transport_handle = iscsi_handle(conn->transport);
@@ -991,10 +976,45 @@ int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
- return iscsi_unicast_skb(skb, priv->daemon_pid);
+ return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
+int iscsi_offload_mesg(struct Scsi_Host *shost,
+ struct iscsi_transport *transport, uint32_t type,
+ char *data, uint16_t data_size)
+{
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ struct iscsi_uevent *ev;
+ int len = NLMSG_SPACE(sizeof(*ev) + data_size);
+
+ skb = alloc_skb(len, GFP_NOIO);
+ if (!skb) {
+ printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
+ return -ENOMEM;
+ }
+
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
+ ev = NLMSG_DATA(nlh);
+ memset(ev, 0, sizeof(*ev));
+ ev->type = type;
+ ev->transport_handle = iscsi_handle(transport);
+ switch (type) {
+ case ISCSI_KEVENT_PATH_REQ:
+ ev->r.req_path.host_no = shost->host_no;
+ break;
+ case ISCSI_KEVENT_IF_DOWN:
+ ev->r.notify_if_down.host_no = shost->host_no;
+ break;
+ }
+
+ memcpy((char *)ev + sizeof(*ev), data, data_size);
+
+ return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_NOIO);
+}
+EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
+
void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
{
struct nlmsghdr *nlh;
@@ -1014,7 +1034,7 @@ void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
return;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
ev->transport_handle = iscsi_handle(conn->transport);
ev->type = ISCSI_KEVENT_CONN_ERROR;
@@ -1022,7 +1042,7 @@ void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
ev->r.connerror.cid = conn->cid;
ev->r.connerror.sid = iscsi_conn_get_sid(conn);
- iscsi_broadcast_skb(skb, GFP_ATOMIC);
+ iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
error);
@@ -1030,8 +1050,8 @@ void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
static int
-iscsi_if_send_reply(int pid, int seq, int type, int done, int multi,
- void *payload, int size)
+iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
+ void *payload, int size)
{
struct sk_buff *skb;
struct nlmsghdr *nlh;
@@ -1045,10 +1065,10 @@ iscsi_if_send_reply(int pid, int seq, int type, int done, int multi,
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
nlh->nlmsg_flags = flags;
memcpy(NLMSG_DATA(nlh), payload, size);
- return iscsi_unicast_skb(skb, pid);
+ return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
}
static int
@@ -1085,7 +1105,7 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
return -ENOMEM;
}
- nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0,
+ nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
(len - sizeof(*nlhstat)), 0);
evstat = NLMSG_DATA(nlhstat);
memset(evstat, 0, sizeof(*evstat));
@@ -1109,7 +1129,8 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
skb_trim(skbstat, NLMSG_ALIGN(actual_size));
nlhstat->nlmsg_len = actual_size;
- err = iscsi_unicast_skb(skbstat, priv->daemon_pid);
+ err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
+ GFP_ATOMIC);
} while (err < 0 && err != -ECONNREFUSED);
return err;
@@ -1143,7 +1164,7 @@ int iscsi_session_event(struct iscsi_cls_session *session,
return -ENOMEM;
}
- nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
ev = NLMSG_DATA(nlh);
ev->transport_handle = iscsi_handle(session->transport);
@@ -1172,7 +1193,7 @@ int iscsi_session_event(struct iscsi_cls_session *session,
* this will occur if the daemon is not up, so we just warn
* the user and when the daemon is restarted it will handle it
*/
- rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
+ rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
if (rc == -ESRCH)
iscsi_cls_session_printk(KERN_ERR, session,
"Cannot notify userspace of session "
@@ -1268,26 +1289,54 @@ iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
return err;
}
+static int iscsi_if_ep_connect(struct iscsi_transport *transport,
+ struct iscsi_uevent *ev, int msg_type)
+{
+ struct iscsi_endpoint *ep;
+ struct sockaddr *dst_addr;
+ struct Scsi_Host *shost = NULL;
+ int non_blocking, err = 0;
+
+ if (!transport->ep_connect)
+ return -EINVAL;
+
+ if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
+ shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
+ if (!shost) {
+ printk(KERN_ERR "ep connect failed. Could not find "
+ "host no %u\n",
+ ev->u.ep_connect_through_host.host_no);
+ return -ENODEV;
+ }
+ non_blocking = ev->u.ep_connect_through_host.non_blocking;
+ } else
+ non_blocking = ev->u.ep_connect.non_blocking;
+
+ dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
+ ep = transport->ep_connect(shost, dst_addr, non_blocking);
+ if (IS_ERR(ep)) {
+ err = PTR_ERR(ep);
+ goto release_host;
+ }
+
+ ev->r.ep_connect_ret.handle = ep->id;
+release_host:
+ if (shost)
+ scsi_host_put(shost);
+ return err;
+}
+
static int
iscsi_if_transport_ep(struct iscsi_transport *transport,
struct iscsi_uevent *ev, int msg_type)
{
struct iscsi_endpoint *ep;
- struct sockaddr *dst_addr;
int rc = 0;
switch (msg_type) {
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
- if (!transport->ep_connect)
- return -EINVAL;
-
- dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
- ep = transport->ep_connect(dst_addr,
- ev->u.ep_connect.non_blocking);
- if (IS_ERR(ep))
- return PTR_ERR(ep);
-
- ev->r.ep_connect_ret.handle = ep->id;
+ rc = iscsi_if_ep_connect(transport, ev, msg_type);
break;
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
if (!transport->ep_poll)
@@ -1365,7 +1414,31 @@ iscsi_set_host_param(struct iscsi_transport *transport,
}
static int
-iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct iscsi_path *params;
+ int err;
+
+ if (!transport->set_path)
+ return -ENOSYS;
+
+ shost = scsi_host_lookup(ev->u.set_path.host_no);
+ if (!shost) {
+ printk(KERN_ERR "set path could not find host no %u\n",
+ ev->u.set_path.host_no);
+ return -ENODEV;
+ }
+
+ params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
+ err = transport->set_path(shost, params);
+
+ scsi_host_put(shost);
+ return err;
+}
+
+static int
+iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
{
int err = 0;
struct iscsi_uevent *ev = NLMSG_DATA(nlh);
@@ -1375,6 +1448,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
struct iscsi_cls_conn *conn;
struct iscsi_endpoint *ep = NULL;
+ if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
+ *group = ISCSI_NL_GRP_UIP;
+ else
+ *group = ISCSI_NL_GRP_ISCSID;
+
priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
if (!priv)
return -EINVAL;
@@ -1383,8 +1461,6 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (!try_module_get(transport->owner))
return -EINVAL;
- priv->daemon_pid = NETLINK_CREDS(skb)->pid;
-
switch (nlh->nlmsg_type) {
case ISCSI_UEVENT_CREATE_SESSION:
err = iscsi_if_create_session(priv, ep, ev,
@@ -1469,6 +1545,7 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
+ case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
break;
case ISCSI_UEVENT_TGT_DSCVR:
@@ -1477,6 +1554,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case ISCSI_UEVENT_SET_HOST_PARAM:
err = iscsi_set_host_param(transport, ev);
break;
+ case ISCSI_UEVENT_PATH_UPDATE:
+ err = iscsi_set_path(transport, ev);
+ break;
default:
err = -ENOSYS;
break;
@@ -1499,6 +1579,7 @@ iscsi_if_rx(struct sk_buff *skb)
uint32_t rlen;
struct nlmsghdr *nlh;
struct iscsi_uevent *ev;
+ uint32_t group;
nlh = nlmsg_hdr(skb);
if (nlh->nlmsg_len < sizeof(*nlh) ||
@@ -1511,7 +1592,7 @@ iscsi_if_rx(struct sk_buff *skb)
if (rlen > skb->len)
rlen = skb->len;
- err = iscsi_if_recv_msg(skb, nlh);
+ err = iscsi_if_recv_msg(skb, nlh, &group);
if (err) {
ev->type = ISCSI_KEVENT_IF_ERROR;
ev->iferror = err;
@@ -1525,8 +1606,7 @@ iscsi_if_rx(struct sk_buff *skb)
*/
if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
break;
- err = iscsi_if_send_reply(
- NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
+ err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
} while (err < 0 && err != -ECONNREFUSED);
skb_pull(skb, rlen);
@@ -1774,7 +1854,6 @@ iscsi_register_transport(struct iscsi_transport *tt)
if (!priv)
return NULL;
INIT_LIST_HEAD(&priv->list);
- priv->daemon_pid = -1;
priv->iscsi_transport = tt;
priv->t.user_scan = iscsi_user_scan;
priv->t.create_work_queue = 1;