From: Vikas Chaudhary <vikas.chaudhary@xxxxxxxxxx>
Added ping support for iscsi adapter, application can use this
interface for diagnostic network connection.
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@xxxxxxxxxx>
---
drivers/scsi/scsi_transport_iscsi.c | 59 +++++++++++++++++++++++++++++++++++
include/scsi/iscsi_if.h | 17 ++++++++++
include/scsi/scsi_transport_iscsi.h | 8 +++++
3 files changed, 84 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 1ad5860..c5f1581 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1507,6 +1507,35 @@ void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
}
EXPORT_SYMBOL_GPL(iscsi_post_host_event);
+void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
+ uint32_t status, uint32_t pid, uint32_t data_size,
+ uint8_t *data)
+{
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ struct iscsi_uevent *ev;
+ int len = NLMSG_SPACE(sizeof(*ev) + data_size);
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
+ return;
+ }
+
+ nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
+ ev = NLMSG_DATA(nlh);
+ ev->transport_handle = iscsi_handle(transport);
+ ev->type = ISCSI_KEVENT_PING_COMP;
+ ev->r.ping_comp.host_no = host_no;
+ ev->r.ping_comp.status = status;
+ ev->r.ping_comp.pid = pid;
+ ev->r.ping_comp.data_size = data_size;
+ memcpy((char *)ev + sizeof(*ev), data, data_size);
+
+ iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
+}
+EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
+
static int
iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
void *payload, int size)
@@ -1946,6 +1975,33 @@ iscsi_set_iface_params(struct iscsi_transport *transport,
}
static int
+iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
+{
+ struct Scsi_Host *shost;
+ struct sockaddr *dst_addr;
+ int err;
+
+ if (!transport->send_ping)
+ return -ENOSYS;
+
+ shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
+ if (!shost) {
+ printk(KERN_ERR "iscsi_ping could not find host no %u\n",
+ ev->u.iscsi_ping.host_no);
+ return -ENODEV;
+ }
+
+ dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
+ err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
+ ev->u.iscsi_ping.iface_type,
+ ev->u.iscsi_ping.payload_size,
+ ev->u.iscsi_ping.pid,
+ dst_addr);
+ 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;
@@ -2090,6 +2146,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
err = iscsi_set_iface_params(transport, ev,
nlmsg_attrlen(nlh, sizeof(*ev)));
break;
+ case ISCSI_UEVENT_PING:
+ err = iscsi_send_ping(transport, ev);
+ break;
default:
err = -ENOSYS;
break;
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 3aac991..7ff9678 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))));
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 7f04731..aede513 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -144,6 +144,9 @@ struct iscsi_transport {
int param, char *buf);
umode_t (*attr_is_visible)(int param_type, int param);
int (*bsg_request)(struct bsg_job *job);
+ int (*send_ping) (struct Scsi_Host *shost, uint32_t iface_num,
+ uint32_t iface_type, uint32_t payload_size,
+ uint32_t pid, struct sockaddr *dst_addr);
};
/*
@@ -172,6 +175,11 @@ extern void iscsi_post_host_event(uint32_t host_no,
uint32_t data_size,
uint8_t *data);
+extern void iscsi_ping_comp_event(uint32_t host_no,
+ struct iscsi_transport *transport,
+ uint32_t status, uint32_t pid,
+ uint32_t data_size, uint8_t *data);
+
struct iscsi_cls_conn {
struct list_head conn_list; /* item in connlist */
void *dd_data; /* LLD private data */
--
1.7.8.247.g10f4e
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
