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lf-6.6.y
linux-imx/Documentation/ABI/stable/sysfs-transport-srp
Bart Van Assche 8c64e4531c scsi_transport_srp: Add periodic reconnect support 
Add support for periodically reconnecting to an SRP target until
the dev_loss timer expires. After the tenth reconnection attempt,
gradually slow down subsequent reconnect attempts.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-11-08 14:43:16 -08:00

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What: /sys/class/srp_remote_ports/port-:/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-:/dev_loss_tmo Date: February 1, 2014 KernelVersion: 3.13 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org Description: Number of seconds the SCSI layer will wait after a transport layer error has been observed before removing a target port. Zero means immediate removal. Setting this attribute to "off" will disable the dev_loss timer.

What: /sys/class/srp_remote_ports/port-:/fast_io_fail_tmo Date: February 1, 2014 KernelVersion: 3.13 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org Description: Number of seconds the SCSI layer will wait after a transport layer error has been observed before failing I/O. Zero means failing I/O immediately. Setting this attribute to "off" will disable the fast_io_fail timer.

What: /sys/class/srp_remote_ports/port-:/port_id Date: June 27, 2007 KernelVersion: 2.6.24 Contact: linux-scsi@vger.kernel.org Description: 16-byte local SRP port identifier in hexadecimal format. An example: 4c:49:4e:55:58:20:56:49:4f:00:00:00:00:00:00:00.

What: /sys/class/srp_remote_ports/port-:/reconnect_delay Date: February 1, 2014 KernelVersion: 3.13 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org Description: Number of seconds the SCSI layer will wait after a reconnect attempt failed before retrying. Setting this attribute to "off" will disable time-based reconnecting.

What: /sys/class/srp_remote_ports/port-:/roles Date: June 27, 2007 KernelVersion: 2.6.24 Contact: linux-scsi@vger.kernel.org Description: Role of the remote port. Either "SRP Initiator" or "SRP Target".

What: /sys/class/srp_remote_ports/port-:/state Date: February 1, 2014 KernelVersion: 3.13 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org Description: State of the transport layer used for communication with the remote port. "running" if the transport layer is operational; "blocked" if a transport layer error has been encountered but the fast_io_fail_tmo timer has not yet fired; "fail-fast" after the fast_io_fail_tmo timer has fired and before the "dev_loss_tmo" timer has fired; "lost" after the "dev_loss_tmo" timer has fired and before the port is finally removed.