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IB/srp: Export sgid to sysfs 

On an initiator system with multiple IB ports it is not yet possible
to figure out what the originating port of an SRP connection is. Hence
make the source GID available in sysfs.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Bart Van Assche 2013-10-26 14:38:12 +02:00 committed by Roland Dreier
parent a95cadb9da
commit 848b3082db
2 changed files with 17 additions and 0 deletions
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7
Documentation/ABI/stable/sysfs-driver-ib_srp
View File

@ -155,6 +155,13 @@ Contact: linux-rdma@vger.kernel.org
Description: InfiniBand service ID used for establishing communication with
the SRP target.
What: /sys/class/scsi_host/host<n>/sgid
Date: February 1, 2014
KernelVersion: 3.13
Contact: linux-rdma@vger.kernel.org
Description: InfiniBand GID of the source port used for communication with
the SRP target.
What: /sys/class/scsi_host/host<n>/zero_req_lim
Date: September 20, 2006
KernelVersion: 2.6.18

10
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -1965,6 +1965,14 @@ static ssize_t show_pkey(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "0x%04x\n", be16_to_cpu(target->path.pkey));
}
static ssize_t show_sgid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct srp_target_port *target = host_to_target(class_to_shost(dev));
return sprintf(buf, "%pI6\n", target->path.sgid.raw);
}
static ssize_t show_dgid(struct device *dev, struct device_attribute *attr,
char *buf)
{
@ -2049,6 +2057,7 @@ static DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL);
static DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL);
static DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL);
static DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL);
static DEVICE_ATTR(sgid, S_IRUGO, show_sgid, NULL);
static DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL);
static DEVICE_ATTR(orig_dgid, S_IRUGO, show_orig_dgid, NULL);
static DEVICE_ATTR(req_lim, S_IRUGO, show_req_lim, NULL);
@ -2065,6 +2074,7 @@ static struct device_attribute *srp_host_attrs[] = {
&dev_attr_ioc_guid,
&dev_attr_service_id,
&dev_attr_pkey,
&dev_attr_sgid,
&dev_attr_dgid,
&dev_attr_orig_dgid,
&dev_attr_req_lim,