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Commit 3af142fe authored by Adheer Chandravanshi's avatar Adheer Chandravanshi Committed by James Bottomley
Browse files

[SCSI] scsi_transport_iscsi: Add support to set CHAP entries 



For offload iSCSI like qla4xxx, CHAP entries are stored in adapter's
flash.
This patch adds support to add/update CHAP entries in adapter's flash
using iscsi tools, like Open-iSCSI.

Signed-off-by: default avatarAdheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Signed-off-by: default avatarVikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent b1d0b63f

drivers/scsi/scsi_transport_iscsi.c

+26 −0
Original line number Diff line number Diff line
@@ -2744,6 +2744,28 @@ iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh) 
	return err;

}



static int iscsi_set_chap(struct iscsi_transport *transport,

			  struct iscsi_uevent *ev, uint32_t len)

{

	char *data = (char *)ev + sizeof(*ev);

	struct Scsi_Host *shost;

	int err = 0;



	if (!transport->set_chap)

		return -ENOSYS;



	shost = scsi_host_lookup(ev->u.set_path.host_no);

	if (!shost) {

		pr_err("%s could not find host no %u\n",

		       __func__, ev->u.set_path.host_no);

		return -ENODEV;

	}



	err = transport->set_chap(shost, data, len);

	scsi_host_put(shost);

	return err;

}



static int iscsi_delete_chap(struct iscsi_transport *transport,

			     struct iscsi_uevent *ev)

{
@@ -3234,6 +3256,10 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) 
	case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:

		err = iscsi_logout_flashnode_sid(transport, ev);

		break;

	case ISCSI_UEVENT_SET_CHAP:

		err = iscsi_set_chap(transport, ev,

				     nlmsg_attrlen(nlh, sizeof(*ev)));

		break;

	default:

		err = -ENOSYS;

		break;

include/scsi/iscsi_if.h

+17 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ enum iscsi_uevent_e { 
	ISCSI_UEVENT_LOGIN_FLASHNODE	= UEVENT_BASE + 28,

	ISCSI_UEVENT_LOGOUT_FLASHNODE	= UEVENT_BASE + 29,

	ISCSI_UEVENT_LOGOUT_FLASHNODE_SID	= UEVENT_BASE + 30,

	ISCSI_UEVENT_SET_CHAP		= UEVENT_BASE + 31,



	/* up events */

	ISCSI_KEVENT_RECV_PDU		= KEVENT_BASE + 1,
@@ -309,8 +310,16 @@ enum iscsi_param_type { 
	ISCSI_HOST_PARAM,	/* iscsi_host_param */

	ISCSI_NET_PARAM,	/* iscsi_net_param */

	ISCSI_FLASHNODE_PARAM,	/* iscsi_flashnode_param */

	ISCSI_CHAP_PARAM,	/* iscsi_chap_param */

};



/* structure for minimalist usecase */

struct iscsi_param_info {

	uint32_t len;		/* Actual length of the param value */

	uint16_t param;		/* iscsi param */

	uint8_t value[0];	/* length sized value follows */

} __packed;



struct iscsi_iface_param_info {

	uint32_t iface_num;	/* iface number, 0 - n */

	uint32_t len;		/* Actual length of the param */
@@ -739,6 +748,14 @@ enum chap_type_e { 
	CHAP_TYPE_IN,

};



enum iscsi_chap_param {

	ISCSI_CHAP_PARAM_INDEX,

	ISCSI_CHAP_PARAM_CHAP_TYPE,

	ISCSI_CHAP_PARAM_USERNAME,

	ISCSI_CHAP_PARAM_PASSWORD,

	ISCSI_CHAP_PARAM_PASSWORD_LEN

};



#define ISCSI_CHAP_AUTH_NAME_MAX_LEN	256

#define ISCSI_CHAP_AUTH_SECRET_MAX_LEN	256

struct iscsi_chap_rec {

include/scsi/scsi_transport_iscsi.h

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ struct iscsi_transport { 
	int (*get_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx,

			 uint32_t *num_entries, char *buf);

	int (*delete_chap) (struct Scsi_Host *shost, uint16_t chap_tbl_idx);

	int (*set_chap) (struct Scsi_Host *shost, void *data, int len);

	int (*get_flashnode_param) (struct iscsi_bus_flash_session *fnode_sess,

				    int param, char *buf);

	int (*set_flashnode_param) (struct iscsi_bus_flash_session *fnode_sess,