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[SCSI] iscsi class: add iscsi host set param event 

The iscsi class uses the set_param event to set session
and connection params. This patch adds a set_host_param
so we can set host level values.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Christie 2007-05-30 12:57:11 -05:00 committed by James Bottomley
parent 2174a04ee7
commit 1d9bf13a9c
3 changed files with 37 additions and 1 deletions
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29
drivers/scsi/scsi_transport_iscsi.c
View File

@ -967,6 +967,30 @@ iscsi_tgt_dscvr(struct iscsi_transport *transport,
return err;
}
static int
iscsi_set_host_param(struct iscsi_transport *transport,
struct iscsi_uevent *ev)
{
char *data = (char*)ev + sizeof(*ev);
struct Scsi_Host *shost;
int err;
if (!transport->set_host_param)
return -ENOSYS;
shost = scsi_host_lookup(ev->u.set_host_param.host_no);
if (IS_ERR(shost)) {
printk(KERN_ERR "set_host_param could not find host no %u\n",
ev->u.set_host_param.host_no);
return -ENODEV;
}
err = transport->set_host_param(shost, ev->u.set_host_param.param,
data, ev->u.set_host_param.len);
scsi_host_put(shost);
return err;
}
static int
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
@ -1058,8 +1082,11 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case ISCSI_UEVENT_TGT_DSCVR:
err = iscsi_tgt_dscvr(transport, ev);
break;
case ISCSI_UEVENT_SET_HOST_PARAM:
err = iscsi_set_host_param(transport, ev);
break;
default:
err = -EINVAL;
err = -ENOSYS;
break;
}

6
include/scsi/iscsi_if.h
View File

@ -48,6 +48,7 @@ enum iscsi_uevent_e {
ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14,
ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15,
ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16,
/* up events */
ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
@ -136,6 +137,11 @@ struct iscsi_uevent {
*/
uint32_t enable;
} tgt_dscvr;
struct msg_set_host_param {
uint32_t host_no;
uint32_t param; /* enum iscsi_host_param */
uint32_t len;
} set_host_param;
} u;
union {
/* messages k -> u */

3
include/scsi/scsi_transport_iscsi.h
View File

@ -108,6 +108,9 @@ struct iscsi_transport {
enum iscsi_param param, char *buf);
int (*get_host_param) (struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf);
int (*set_host_param) (struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf,
int buflen);
int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (struct iscsi_cls_conn *conn,