IB/srp: Allow SRP disconnect through sysfs

Make it possible to disconnect the IB RC connection used by the SRP
protocol to communicate with a target.

Have the SRP transport layer create a sysfs "delete" attribute for
initiator drivers that support this functionality.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/ABI/stable/sysfs-transport-srp b/Documentation/ABI/stable/sysfs-transport-srp
index 7b0d4a5350f1..b36fb0dc13c8 100644
--- a/Documentation/ABI/stable/sysfs-transport-srp
+++ b/Documentation/ABI/stable/sysfs-transport-srp
@@ -1,3 +1,10 @@
+What:           /sys/class/srp_remote_ports/port-<h>:<n>/delete
+Date:           June 1, 2012
+KernelVersion:  3.7
+Contact:        linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
+Description:    Instructs an SRP initiator to disconnect from a target and to
+                remove all LUNs imported from that target.
+
 What:           /sys/class/srp_remote_ports/port-<h>:<n>/port_id
 Date:           June 27, 2007
 KernelVersion:  2.6.24