42 lines
1.5 KiB
Text
42 lines
1.5 KiB
Text
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seqdiag {
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// seqdiag -T svg -o doc/mount-osx.svg doc/mount-osx.seq
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app;
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fuse [label="bazil.org/fuse"];
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fusermount;
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kernel;
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mounts;
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app -> fuse [label="Mount"];
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fuse -> fusermount [label="spawn, pass socketpair fd"];
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fusermount -> kernel [label="open /dev/fuse"];
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fusermount -> kernel [label="mount(2)"];
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kernel ->> mounts [label="mount is visible"];
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fusermount <-- kernel [label="mount(2) returns"];
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fuse <<-- fusermount [diagonal, label="exit, receive /dev/fuse fd", leftnote="on Linux, successful exit here\nmeans the mount has happened,\nthough InitRequest might not have yet"];
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app <-- fuse [label="Mount returns\nConn.Ready is already closed", rightnote="InitRequest and StatfsRequest\nmay or may not be seen\nbefore Conn.Ready,\ndepending on platform"];
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app -> fuse [label="fs.Serve"];
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fuse => kernel [label="read /dev/fuse fd", note="starts with InitRequest"];
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fuse => app [label="FS/Node/Handle methods"];
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fuse => kernel [label="write /dev/fuse fd"];
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... repeat ...
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... shutting down ...
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app -> fuse [label="Unmount"];
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fuse -> fusermount [label="fusermount -u"];
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fusermount -> kernel;
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kernel <<-- mounts;
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fusermount <-- kernel;
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fuse <<-- fusermount [diagonal];
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app <-- fuse [label="Unmount returns"];
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// actually triggers before above
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fuse <<-- kernel [diagonal, label="/dev/fuse EOF"];
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app <-- fuse [label="fs.Serve returns"];
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app -> fuse [label="conn.Close"];
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fuse -> kernel [label="close /dev/fuse fd"];
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fuse <-- kernel;
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app <-- fuse;
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}
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