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>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/ABI/stable/sysfs-driver-ib_srp b/Documentation/ABI/stable/sysfs-driver-ib_srp
index 18e9b279ebb1..b95067eb5f18 100644
--- a/Documentation/ABI/stable/sysfs-driver-ib_srp
+++ b/Documentation/ABI/stable/sysfs-driver-ib_srp
@@ -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