From 31b90347dc9fb7649a8dc3ffefa52771ac30e10b Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 11 Dec 2013 17:08:43 +0100 Subject: 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 Signed-off-by: Roland Dreier --- Documentation/scsi/scsi_transport_srp/Makefile | 7 ++++++ .../scsi_transport_srp/rport_state_diagram.dot | 26 ++++++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 Documentation/scsi/scsi_transport_srp/Makefile create mode 100644 Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot (limited to 'Documentation/scsi') diff --git a/Documentation/scsi/scsi_transport_srp/Makefile b/Documentation/scsi/scsi_transport_srp/Makefile new file mode 100644 index 000000000000..5f6b567e955c --- /dev/null +++ b/Documentation/scsi/scsi_transport_srp/Makefile @@ -0,0 +1,7 @@ +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 $@ $< diff --git a/Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot b/Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot new file mode 100644 index 000000000000..75d610d6411a --- /dev/null +++ b/Documentation/scsi/scsi_transport_srp/rport_state_diagram.dot @@ -0,0 +1,26 @@ +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()" ]; +} -- cgit v1.2.3