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Commit fb2b2844 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Nicholas Bellinger
Browse files

tcm_loop: Implement transport offline 



Add attribute 'transport_status' to simulate link failure.

Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 1ec59fee

drivers/target/loopback/tcm_loop.c

+52 −1
Original line number Diff line number Diff line
@@ -178,7 +178,10 @@ static void tcm_loop_submission_work(struct work_struct *work) 
		set_host_byte(sc, DID_NO_CONNECT);

		goto out_done;

	}



	if (tl_tpg->tl_transport_status == TCM_TRANSPORT_OFFLINE) {

		set_host_byte(sc, DID_TRANSPORT_DISRUPTED);

		goto out_done;

	}

	tl_nexus = tl_hba->tl_nexus;

	if (!tl_nexus) {

		scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus"
@@ -1064,8 +1067,56 @@ check_newline: 


TF_TPG_BASE_ATTR(tcm_loop, nexus, S_IRUGO | S_IWUSR);



static ssize_t tcm_loop_tpg_show_transport_status(

	struct se_portal_group *se_tpg,

	char *page)

{

	struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,

			struct tcm_loop_tpg, tl_se_tpg);

	const char *status = NULL;

	ssize_t ret = -EINVAL;



	switch (tl_tpg->tl_transport_status) {

	case TCM_TRANSPORT_ONLINE:

		status = "online";

		break;

	case TCM_TRANSPORT_OFFLINE:

		status = "offline";

		break;

	default:

		break;

	}



	if (status)

		ret = snprintf(page, PAGE_SIZE, "%s\n", status);



	return ret;

}



static ssize_t tcm_loop_tpg_store_transport_status(

	struct se_portal_group *se_tpg,

	const char *page,

	size_t count)

{

	struct tcm_loop_tpg *tl_tpg = container_of(se_tpg,

			struct tcm_loop_tpg, tl_se_tpg);



	if (!strncmp(page, "online", 6)) {

		tl_tpg->tl_transport_status = TCM_TRANSPORT_ONLINE;

		return count;

	}

	if (!strncmp(page, "offline", 7)) {

		tl_tpg->tl_transport_status = TCM_TRANSPORT_OFFLINE;

		return count;

	}

	return -EINVAL;

}



TF_TPG_BASE_ATTR(tcm_loop, transport_status, S_IRUGO | S_IWUSR);



static struct configfs_attribute *tcm_loop_tpg_attrs[] = {

	&tcm_loop_tpg_nexus.attr,

	&tcm_loop_tpg_transport_status.attr,

	NULL,

};

drivers/target/loopback/tcm_loop.h

+4 −0
Original line number Diff line number Diff line
@@ -40,8 +40,12 @@ struct tcm_loop_nacl { 
	struct se_node_acl se_node_acl;

};



#define TCM_TRANSPORT_ONLINE 0

#define TCM_TRANSPORT_OFFLINE 1



struct tcm_loop_tpg {

	unsigned short tl_tpgt;

	unsigned short tl_transport_status;

	atomic_t tl_tpg_port_count;

	struct se_portal_group tl_se_tpg;

	struct tcm_loop_hba *tl_hba;