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Commit 6ecb0c84 authored by Roland Dreier's avatar Roland Dreier
Browse files

IB/srp: Add SCSI host attributes to show target port 



Add SCSI host attributes in sysfs that show the ID extension, IOC
GUID, service ID, P_Key and destination GID for each target port that
the SRP initiator connects to.

Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 87fd1a11

drivers/infiniband/ulp/srp/ib_srp.c

+83 −1
Original line number Diff line number Diff line
@@ -1237,6 +1237,87 @@ static int srp_reset_host(struct scsi_cmnd *scmnd) 
	return ret;

}



static ssize_t show_id_ext(struct class_device *cdev, char *buf)

{

	struct srp_target_port *target = host_to_target(class_to_shost(cdev));



	if (target->state == SRP_TARGET_DEAD ||

	    target->state == SRP_TARGET_REMOVED)

		return -ENODEV;



	return sprintf(buf, "0x%016llx\n",

		       (unsigned long long) be64_to_cpu(target->id_ext));

}



static ssize_t show_ioc_guid(struct class_device *cdev, char *buf)

{

	struct srp_target_port *target = host_to_target(class_to_shost(cdev));



	if (target->state == SRP_TARGET_DEAD ||

	    target->state == SRP_TARGET_REMOVED)

		return -ENODEV;



	return sprintf(buf, "0x%016llx\n",

		       (unsigned long long) be64_to_cpu(target->ioc_guid));

}



static ssize_t show_service_id(struct class_device *cdev, char *buf)

{

	struct srp_target_port *target = host_to_target(class_to_shost(cdev));



	if (target->state == SRP_TARGET_DEAD ||

	    target->state == SRP_TARGET_REMOVED)

		return -ENODEV;



	return sprintf(buf, "0x%016llx\n",

		       (unsigned long long) be64_to_cpu(target->service_id));

}



static ssize_t show_pkey(struct class_device *cdev, char *buf)

{

	struct srp_target_port *target = host_to_target(class_to_shost(cdev));



	if (target->state == SRP_TARGET_DEAD ||

	    target->state == SRP_TARGET_REMOVED)

		return -ENODEV;



	return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey));

}



static ssize_t show_dgid(struct class_device *cdev, char *buf)

{

	struct srp_target_port *target = host_to_target(class_to_shost(cdev));



	if (target->state == SRP_TARGET_DEAD ||

	    target->state == SRP_TARGET_REMOVED)

		return -ENODEV;



	return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[0]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[1]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[2]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[3]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[4]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[5]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[6]),

		       be16_to_cpu(((__be16 *) target->path.dgid.raw)[7]));

}



static CLASS_DEVICE_ATTR(id_ext,	S_IRUGO, show_id_ext,		NULL);

static CLASS_DEVICE_ATTR(ioc_guid,	S_IRUGO, show_ioc_guid,		NULL);

static CLASS_DEVICE_ATTR(service_id,	S_IRUGO, show_service_id,	NULL);

static CLASS_DEVICE_ATTR(pkey,		S_IRUGO, show_pkey,		NULL);

static CLASS_DEVICE_ATTR(dgid,		S_IRUGO, show_dgid,		NULL);



static struct class_device_attribute *srp_host_attrs[] = {

	&class_device_attr_id_ext,

	&class_device_attr_ioc_guid,

	&class_device_attr_service_id,

	&class_device_attr_pkey,

	&class_device_attr_dgid,

	NULL

};



static struct scsi_host_template srp_template = {

	.module				= THIS_MODULE,

	.name				= DRV_NAME,
@@ -1249,7 +1330,8 @@ static struct scsi_host_template srp_template = { 
	.this_id			= -1,

	.sg_tablesize			= SRP_MAX_INDIRECT,

	.cmd_per_lun			= SRP_SQ_SIZE,

	.use_clustering			= ENABLE_CLUSTERING

	.use_clustering			= ENABLE_CLUSTERING,

	.shost_attrs			= srp_host_attrs

};



static int srp_add_target(struct srp_host *host, struct srp_target_port *target)