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Commit 31b90347 authored by Bart Van Assche's avatar Bart Van Assche Committed by Roland Dreier
Browse files

scsi_transport_srp: Add rport state diagram 



Add a diagram in Documentation/scsi/scsi_transport_srp that
illustrates the rport state transitions.

Signed-off-by: default avatarBart Van Assche <bvanassche@acm.org>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 93079162

Documentation/scsi/scsi_transport_srp/Makefile

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all: rport_state_diagram.svg rport_state_diagram.png



rport_state_diagram.svg: rport_state_diagram.dot

	dot -Tsvg -o $@ $<



rport_state_diagram.png: rport_state_diagram.dot

	dot -Tpng -o $@ $<

Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot

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digraph srp_initiator {

	node [shape = doublecircle]; running lost;

	node [shape = circle];



	{

	  rank = min;

	  running_rta	[ label = "running;\nreconnect\ntimer\nactive" ];

	};

	running		[ label = "running;\nreconnect\ntimer\nstopped" ];

	blocked;

	failfast	[ label = "fail I/O\nfast" ];

	lost;



	running -> running_rta		[ label = "fast_io_fail_tmo = off and\ndev_loss_tmo = off;\nsrp_start_tl_fail_timers()" ];

	running_rta -> running		[ label = "fast_io_fail_tmo = off and\ndev_loss_tmo = off;\nreconnecting succeeded" ];

	running -> blocked		[ label = "fast_io_fail_tmo >= 0 or\ndev_loss_tmo >= 0;\nsrp_start_tl_fail_timers()" ];

	running -> failfast		[ label = "fast_io_fail_tmo = off and\ndev_loss_tmo = off;\nreconnecting failed\n" ];

	blocked -> failfast		[ label = "fast_io_fail_tmo\nexpired or\nreconnecting\nfailed" ];

	blocked -> lost			[ label = "dev_loss_tmo\nexpired or\nsrp_stop_rport_timers()" ];

	failfast -> lost		[ label = "dev_loss_tmo\nexpired or\nsrp_stop_rport_timers()" ];

	blocked -> running		[ label = "reconnecting\nsucceeded" ];

	failfast -> failfast		[ label = "reconnecting\nfailed" ];

	failfast -> running		[ label = "reconnecting\nsucceeded" ];

	running -> lost			[ label = "srp_stop_rport_timers()" ];

	running_rta -> lost		[ label = "srp_stop_rport_timers()" ];

}