[SCSI] iscsi_transport: Added Ping support

Added ping support for iscsi adapter, application can use this
interface for diagnostic network connection.

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 3aac99155e80..7ff9678b7e79 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -60,6 +60,7 @@ enum iscsi_uevent_e {
 
         ISCSI_UEVENT_PATH_UPDATE        = UEVENT_BASE + 20,
         ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
+        ISCSI_UEVENT_PING               = UEVENT_BASE + 22,
 
         /* up events */
         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
@@ -73,6 +74,7 @@ enum iscsi_uevent_e {
         ISCSI_KEVENT_IF_DOWN            = KEVENT_BASE + 8,
         ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
         ISCSI_KEVENT_HOST_EVENT         = KEVENT_BASE + 10,
+        ISCSI_KEVENT_PING_COMP          = KEVENT_BASE + 11,
 };
 
 enum iscsi_tgt_dscvr {
@@ -186,6 +188,14 @@ struct iscsi_uevent {
                         uint32_t        host_no;
                         uint32_t        count;
                 } set_iface_params;
+                struct msg_iscsi_ping {
+                        uint32_t        host_no;
+                        uint32_t        iface_num;
+                        uint32_t        iface_type;
+                        uint32_t        payload_size;
+                        uint32_t        pid;    /* unique ping id associated
+                                                   with each ping request */
+                } iscsi_ping;
         } u;
         union {
                 /* messages k -> u */
@@ -235,6 +245,13 @@ struct iscsi_uevent {
                         uint32_t        data_size;
                         enum iscsi_host_event_code code;
                 } host_event;
+                struct msg_ping_comp {
+                        uint32_t        host_no;
+                        uint32_t        status;
+                        uint32_t        pid;    /* unique ping id associated
+                                                   with each ping request */
+                        uint32_t        data_size;
+                } ping_comp;
         } r;
 } __attribute__ ((aligned (sizeof(uint64_t))));