[SCSI] iscsi_transport: add support for net settings

Allows user space (iscsiadm) to send down network configuration
parameters for LLD to set private network configuration on the iSCSI
adapters.

Based on patch from Lalit Chandivade.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 3fd16d7..212a8d8 100644 (file)
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1557,6 +1557,30 @@ iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
        return err;
 }
 
+static int
+iscsi_set_iface_params(struct iscsi_transport *transport,
+                      struct iscsi_uevent *ev)
+{
+       char *data = (char *)ev + sizeof(*ev);
+       struct Scsi_Host *shost;
+       int err;
+
+       if (!transport->set_iface_param)
+               return -ENOSYS;
+
+       shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
+       if (!shost) {
+               printk(KERN_ERR "set_iface_params could not find host no %u\n",
+                      ev->u.set_iface_params.host_no);
+               return -ENODEV;
+       }
+
+       err = transport->set_iface_param(shost, data,
+                                        ev->u.set_iface_params.count);
+       scsi_host_put(shost);
+       return err;
+}
+
 static int
 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
 {
@@ -1696,6 +1720,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
        case ISCSI_UEVENT_PATH_UPDATE:
                err = iscsi_set_path(transport, ev);
                break;
+       case ISCSI_UEVENT_SET_IFACE_PARAMS:
+               err = iscsi_set_iface_params(transport, ev);
+               break;
        default:
                err = -ENOSYS;
                break;

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index ddb0456..e93831e 100644 (file)
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -59,6 +59,7 @@ enum iscsi_uevent_e {
        ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,
 
        ISCSI_UEVENT_PATH_UPDATE        = UEVENT_BASE + 20,
+       ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
 
        /* up events */
        ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
@@ -172,6 +173,10 @@ struct iscsi_uevent {
                struct msg_set_path {
                        uint32_t        host_no;
                } set_path;
+               struct msg_set_iface_params {
+                       uint32_t        host_no;
+                       uint32_t        count;
+               } set_iface_params;
        } u;
        union {
                /* messages k -> u */
@@ -214,6 +219,21 @@ struct iscsi_uevent {
        } r;
 } __attribute__ ((aligned (sizeof(uint64_t))));
 
+enum iscsi_param_type {
+       ISCSI_PARAM,            /* iscsi_param (session, conn, target, LU) */
+       ISCSI_HOST_PARAM,       /* iscsi_host_param */
+       ISCSI_NET_PARAM,        /* iscsi_net_param */
+};
+
+struct iscsi_iface_param_info {
+       uint32_t iface_num;     /* iface number, 0 - n */
+       uint32_t len;           /* Actual length of the param */
+       uint16_t param;         /* iscsi param value */
+       uint8_t iface_type;     /* IPv4 or IPv6 */
+       uint8_t param_type;     /* iscsi_param_type */
+       uint8_t value[0];       /* length sized value follows */
+} __packed;
+
 /*
  * To keep the struct iscsi_uevent size the same for userspace code
  * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
@@ -237,6 +257,49 @@ struct iscsi_path {
        uint16_t        pmtu;
 } __attribute__ ((aligned (sizeof(uint64_t))));
 
+/* iscsi iface enabled/disabled setting */
+#define ISCSI_IFACE_DISABLE    0x01
+#define ISCSI_IFACE_ENABLE     0x02
+
+/* ipv4 bootproto */
+#define ISCSI_BOOTPROTO_STATIC         0x01
+#define ISCSI_BOOTPROTO_DHCP           0x02
+
+/* ipv6 addr autoconfig type */
+#define ISCSI_IPV6_AUTOCFG_DISABLE             0x01
+#define ISCSI_IPV6_AUTOCFG_ND_ENABLE           0x02
+#define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE       0x03
+
+/* ipv6 link local addr type */
+#define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE    0x01
+#define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE   0x02
+
+/* ipv6 router addr type */
+#define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE       0x01
+#define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE      0x02
+
+#define ISCSI_IFACE_TYPE_IPV4          0x01
+#define ISCSI_IFACE_TYPE_IPV6          0x02
+
+/* iSCSI network params */
+enum iscsi_net_param {
+       ISCSI_NET_PARAM_IPV4_ADDR               = 1,
+       ISCSI_NET_PARAM_IPV4_SUBNET             = 2,
+       ISCSI_NET_PARAM_IPV4_GW                 = 3,
+       ISCSI_NET_PARAM_IPV4_BOOTPROTO          = 4,
+       ISCSI_NET_PARAM_MAC                     = 5,
+       ISCSI_NET_PARAM_IPV6_LINKLOCAL          = 6,
+       ISCSI_NET_PARAM_IPV6_ADDR               = 7,
+       ISCSI_NET_PARAM_IPV6_ROUTER             = 8,
+       ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG       = 9,
+       ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG  = 10,
+       ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG     = 11,
+       ISCSI_NET_PARAM_IFACE_ENABLE            = 12,
+       ISCSI_NET_PARAM_VLAN_ID                 = 13,
+       ISCSI_NET_IFACE_TYPE                    = 14,
+       ISCSI_NET_IFACE_NAME                    = 15,
+};
+
 /*
  * Common error codes
  */

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index bf8f529..9fcce7c 100644 (file)
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -137,6 +137,7 @@ struct iscsi_transport {
        int (*tgt_dscvr) (struct Scsi_Host *shost, enum iscsi_tgt_dscvr type,
                          uint32_t enable, struct sockaddr *dst_addr);
        int (*set_path) (struct Scsi_Host *shost, struct iscsi_path *params);
+       int (*set_iface_param) (struct Scsi_Host *shost, char *data, int count);
 };
 
 /*