IB/srp: Add orig_dgid sysfs attribute to scsi_host
Add an orig_dgid attribute in sysfs for SRP scsi_hosts, so that userspace can tell what the original dgid value written to the add_target file was, even if the connection is redirected to a different port while connecting. Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -1468,6 +1468,25 @@ static ssize_t show_dgid(struct class_device *cdev, char *buf)
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be16_to_cpu(((__be16 *) target->path.dgid.raw)[7]));
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}
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static ssize_t show_orig_dgid(struct class_device *cdev, char *buf)
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{
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struct srp_target_port *target = host_to_target(class_to_shost(cdev));
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if (target->state == SRP_TARGET_DEAD ||
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target->state == SRP_TARGET_REMOVED)
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return -ENODEV;
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return sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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be16_to_cpu(target->orig_dgid[0]),
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be16_to_cpu(target->orig_dgid[1]),
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be16_to_cpu(target->orig_dgid[2]),
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be16_to_cpu(target->orig_dgid[3]),
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be16_to_cpu(target->orig_dgid[4]),
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be16_to_cpu(target->orig_dgid[5]),
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be16_to_cpu(target->orig_dgid[6]),
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be16_to_cpu(target->orig_dgid[7]));
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}
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static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf)
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{
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struct srp_target_port *target = host_to_target(class_to_shost(cdev));
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@ -1498,6 +1517,7 @@ static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL);
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static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL);
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static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
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static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL);
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static CLASS_DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL);
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static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL);
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static CLASS_DEVICE_ATTR(local_ib_port, S_IRUGO, show_local_ib_port, NULL);
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static CLASS_DEVICE_ATTR(local_ib_device, S_IRUGO, show_local_ib_device, NULL);
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@ -1508,6 +1528,7 @@ static struct class_device_attribute *srp_host_attrs[] = {
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&class_device_attr_service_id,
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&class_device_attr_pkey,
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&class_device_attr_dgid,
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&class_device_attr_orig_dgid,
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&class_device_attr_zero_req_lim,
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&class_device_attr_local_ib_port,
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&class_device_attr_local_ib_device,
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@ -1662,6 +1683,7 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
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target->path.dgid.raw[i] = simple_strtoul(dgid, NULL, 16);
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}
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kfree(p);
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memcpy(target->orig_dgid, target->path.dgid.raw, 16);
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break;
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case SRP_OPT_PKEY:
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@ -129,6 +129,7 @@ struct srp_target_port {
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unsigned int scsi_id;
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struct ib_sa_path_rec path;
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__be16 orig_dgid[8];
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struct ib_sa_query *path_query;
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int path_query_id;
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