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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>
59 lines
2.5 KiB
Plaintext
59 lines
2.5 KiB
Plaintext
What: /sys/class/srp_remote_ports/port-<h>:<n>/delete
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Date: June 1, 2012
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KernelVersion: 3.7
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Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
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Description: Instructs an SRP initiator to disconnect from a target and to
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remove all LUNs imported from that target.
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What: /sys/class/srp_remote_ports/port-<h>:<n>/dev_loss_tmo
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Date: February 1, 2014
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KernelVersion: 3.13
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Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
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Description: Number of seconds the SCSI layer will wait after a transport
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layer error has been observed before removing a target port.
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Zero means immediate removal. Setting this attribute to "off"
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will disable the dev_loss timer.
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What: /sys/class/srp_remote_ports/port-<h>:<n>/fast_io_fail_tmo
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Date: February 1, 2014
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KernelVersion: 3.13
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Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
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Description: Number of seconds the SCSI layer will wait after a transport
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layer error has been observed before failing I/O. Zero means
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failing I/O immediately. Setting this attribute to "off" will
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disable the fast_io_fail timer.
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What: /sys/class/srp_remote_ports/port-<h>:<n>/port_id
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Date: June 27, 2007
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KernelVersion: 2.6.24
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Contact: linux-scsi@vger.kernel.org
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Description: 16-byte local SRP port identifier in hexadecimal format. An
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example: 4c:49:4e:55:58:20:56:49:4f:00:00:00:00:00:00:00.
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What: /sys/class/srp_remote_ports/port-<h>:<n>/reconnect_delay
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Date: February 1, 2014
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KernelVersion: 3.13
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Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
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Description: Number of seconds the SCSI layer will wait after a reconnect
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attempt failed before retrying. Setting this attribute to
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"off" will disable time-based reconnecting.
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What: /sys/class/srp_remote_ports/port-<h>:<n>/roles
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Date: June 27, 2007
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KernelVersion: 2.6.24
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Contact: linux-scsi@vger.kernel.org
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Description: Role of the remote port. Either "SRP Initiator" or "SRP Target".
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What: /sys/class/srp_remote_ports/port-<h>:<n>/state
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Date: February 1, 2014
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KernelVersion: 3.13
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Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
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Description: State of the transport layer used for communication with the
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remote port. "running" if the transport layer is operational;
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"blocked" if a transport layer error has been encountered but
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the fast_io_fail_tmo timer has not yet fired; "fail-fast"
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after the fast_io_fail_tmo timer has fired and before the
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"dev_loss_tmo" timer has fired; "lost" after the
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"dev_loss_tmo" timer has fired and before the port is finally
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removed.
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