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restic/vendor/bazil.org/fuse/doc/mount-osx-error-init.seq
2017-07-23 14:25:38 +02:00

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seqdiag {
app;
fuse [label="bazil.org/fuse"];
wait [label="callMount\nhelper goroutine"];
mount_osxfusefs;
kernel;
app -> fuse [label="Mount"];
fuse -> kernel [label="open /dev/osxfuseN"];
fuse -> mount_osxfusefs [label="spawn, pass fd"];
fuse -> wait [label="goroutine", note="blocks on cmd.Wait"];
app <-- fuse [label="Mount returns"];
mount_osxfusefs -> kernel [label="mount(2)"];
app -> fuse [label="fs.Serve"];
fuse => kernel [label="read /dev/osxfuseN fd", note="starts with InitRequest,\nalso seen before mount exits:\ntwo StatfsRequest calls"];
fuse -> app [label="Init"];
fuse <-- app [color=red];
fuse -> kernel [label="write /dev/osxfuseN fd", color=red];
fuse <-- kernel;
mount_osxfusefs <-- kernel [label="mount(2) returns", color=red];
wait <<-- mount_osxfusefs [diagonal, label="exit", color=red];
app <<-- wait [diagonal, label="mount has failed,\nclose Conn.Ready", color=red];
// actually triggers before above
fuse <<-- kernel [diagonal, label="/dev/osxfuseN EOF"];
app <-- fuse [label="fs.Serve returns"];
... conn.MountError != nil, so it was was never mounted ...
... call conn.Close to clean up ...
}