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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: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
hifive-unleashed-5.1
Bart Van Assche 2013-12-11 17:08:43 +01:00 committed by Roland Dreier
parent 93079162bf
commit 31b90347dc
2 changed files with 33 additions and 0 deletions
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7
Documentation/scsi/scsi_transport_srp/Makefile 100644
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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 $@ $<

26
Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot 100644
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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()" ];
}