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[SCSI] be2iscsi: fix null ptr ref in conn get param 

The ep_disconnect function could be freeing the ep
while beiscsi_conn_get_param is running. This has
the driver use the get ep param callback instead
of the get conn param to fix this.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Mike Christie 2011-02-16 15:04:41 -06:00 committed by James Bottomley
parent 7c53c6f89d
commit c7f7fd5b7e
3 changed files with 9 additions and 16 deletions
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18
drivers/scsi/be2iscsi/be_iscsi.c
View File

@ -210,28 +210,20 @@ int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
}
/**
* beiscsi_conn_get_param - get the iscsi parameter
* @cls_conn: pointer to iscsi cls conn
* beiscsi_ep_get_param - get the iscsi parameter
* @ep: pointer to iscsi ep
* @param: parameter type identifier
* @buf: buffer pointer
*
* returns iscsi parameter
*/
int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
enum iscsi_param param, char *buf)
{
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
int len = 0;
SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
beiscsi_ep = beiscsi_conn->ep;
if (!beiscsi_ep) {
SE_DEBUG(DBG_LVL_1,
"In beiscsi_conn_get_param , no beiscsi_ep\n");
return -ENODEV;
}
switch (param) {
case ISCSI_PARAM_CONN_PORT:
@ -244,7 +236,7 @@ int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
break;
default:
return iscsi_conn_get_param(cls_conn, param, buf);
return -ENOSYS;
}
return len;
}

4
drivers/scsi/be2iscsi/be_iscsi.h
View File

@ -48,8 +48,8 @@ int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn,
uint64_t transport_fd, int is_leading);
int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf);
int beiscsi_ep_get_param(struct iscsi_endpoint *ep, enum iscsi_param param,
char *buf);
int beiscsi_get_host_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf);

3
drivers/scsi/be2iscsi/be_main.c
View File

@ -4384,7 +4384,7 @@ struct iscsi_transport beiscsi_iscsi_transport = {
.bind_conn = beiscsi_conn_bind,
.destroy_conn = iscsi_conn_teardown,
.set_param = beiscsi_set_param,
.get_conn_param = beiscsi_conn_get_param,
.get_conn_param = iscsi_conn_get_param,
.get_session_param = iscsi_session_get_param,
.get_host_param = beiscsi_get_host_param,
.start_conn = beiscsi_conn_start,
@ -4395,6 +4395,7 @@ struct iscsi_transport beiscsi_iscsi_transport = {
.alloc_pdu = beiscsi_alloc_pdu,
.parse_pdu_itt = beiscsi_parse_pdu,
.get_stats = beiscsi_conn_get_stats,
.get_ep_param = beiscsi_ep_get_param,
.ep_connect = beiscsi_ep_connect,
.ep_poll = beiscsi_ep_poll,
.ep_disconnect = beiscsi_ep_disconnect,