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https://github.com/linuxkit/linuxkit.git
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9pudfuse: remove in favor of transfused
This commit is contained in:
David Sheets
1
alpine/packages/9pudfuse/.gitignore
vendored
1
alpine/packages/9pudfuse/.gitignore
vendored
@@ -1 +0,0 @@
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/9pudfuse
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@@ -1,6 +0,0 @@
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PKG result
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PKG stringext
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PKG fd-send-recv
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S .
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B .
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@@ -1,13 +0,0 @@
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FROM ocaml/opam:alpine-3.3_ocaml-4.02.3
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ENV \
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OPAMYES=true \
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CAML_LD_LIBRARY_PATH="/root/.opam/4.02.3/lib/stublibs:/usr/pkg/lib/ocaml/stublibs" \
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MANPATH="/root/.opam/4.02.3/man:" \
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PERL5LIB="/root/.opam/4.02.3/lib/perl5" \
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OCAML_TOPLEVEL_PATH="/root/.opam/4.02.3/lib/toplevel" \
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PATH=/root/.opam/4.02.3/bin:$PATH
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COPY . .
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RUN opam depext -i result stringext fd-send-recv
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RUN opam config exec -- ocamlbuild -tag debug -use-ocamlfind -package stringext,fd-send-recv,result fuse_socket_9p.native
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@@ -1,11 +0,0 @@
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all: 9pudfuse
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9pudfuse: Dockerfile fuse_socket_9p.ml
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docker build -t 9pudfuse:build .
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docker run --rm 9pudfuse:build \
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cat fuse_socket_9p.native > 9pudfuse
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chmod 755 9pudfuse
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clean:
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rm -f 9pudfuse
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docker images -q 9pudfuse:build | xargs docker rmi -f
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@@ -1,37 +0,0 @@
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#!/sbin/openrc-run
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description="9p socket fuse proxy server"
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depend()
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{
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need 9pinit
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}
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start()
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{
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[ -d /Transfuse ] || exit 0
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ebegin "Starting FUSE socket passthrough"
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[ -n "${PIDFILE}" ] || PIDFILE=/var/run/9pudfuse.pid
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# start-stop-daemon --start --quiet \
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# --exec /sbin/9pudfuse \
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# --pidfile "${PIDFILE}" \
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# -- -path /Transfuse
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# eend $? "Failed to start 9pudfuse"
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OCAMLRUNPARAM=b /sbin/9pudfuse &
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}
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stop()
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{
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[ -d /Transfuse ] || exit 0
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ebegin "Stopping FUSE socket passthrough"
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[ -n "${PIDFILE}" ] || PIDFILE=/var/run/9pudfuse.pid
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start-stop-daemon --stop --quiet \
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--pidfile "${PIDFILE}"
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eend $? "Failed to stop 9pudfuse"
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}
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@@ -1,170 +0,0 @@
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exception ReadClosed
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let fusermount = "fusermount"
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let path = "/Transfuse"
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module Log = struct
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let fatal fmt =
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Printf.ksprintf (fun s -> prerr_endline s; exit 1) fmt
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let error fmt =
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Printf.ksprintf (fun s -> prerr_endline s) fmt
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let info fmt =
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Printf.ksprintf (fun s -> prerr_endline s) fmt
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end
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let events_path = path ^ "/events"
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let try_fork caller_name =
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try
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Unix.fork ()
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with Unix.Unix_error (err,"fork",_) ->
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Log.fatal "%s fork failed: %s" caller_name (Unix.error_message err)
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let check_status = function
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| Unix.WEXITED 0 -> Result.Ok ()
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| Unix.WEXITED k ->
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Result.Error ("exit code "^(string_of_int k))
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| Unix.WSIGNALED k ->
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Result.Error ("ocaml kill signal "^(string_of_int k))
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| Unix.WSTOPPED k ->
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Result.Error ("ocaml stop signal "^(string_of_int k))
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let finally f at_end =
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let r = try f () with e -> (at_end (); raise e) in
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at_end ();
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r
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let copy description dst src =
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let sz = 1 lsl 16 in
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let buf = Bytes.create sz in
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(*let pnum = ref 0 in*)
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let rec loop () =
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let n = Unix.read src buf 0 sz in
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(if n = 0 then raise ReadClosed);
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(*
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let fd = Unix.(
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openfile ("/tmp/"^description^"_"^(string_of_int !pnum))
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[O_WRONLY; O_CREAT] 0o600) in
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let k = Unix.write fd buf 0 n in
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assert (k = n);
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Unix.close fd;
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incr pnum;
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*)
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let written = try
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Unix.write dst buf 0 n
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with
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| Unix.Unix_error (Unix.EINVAL, "write", _) ->
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failwith ("copy write for "^description^" failed with EINVAL")
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| Unix.Unix_error (Unix.ENOENT, "write", _) ->
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failwith ("copy write for "^description^" failed with ENOENT")
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in
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(if n <> written
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then Log.error "copy of %s read %d but wrote %d" description n written);
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loop ()
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in
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try loop ()
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with
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| ReadClosed -> raise ReadClosed
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| e -> (Log.error "copy for %s failed" description; raise e)
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let with_reader id f =
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let read_path = Printf.sprintf "%s/connections/%d/read" path id in
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let read_fd = Unix.(openfile read_path [O_RDONLY] 0o000) in
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try finally (fun () ->
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f read_path read_fd
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) (fun () ->
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Unix.close read_fd
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) with
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| ReadClosed -> exit 0
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let with_writer id f =
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let write_path = Printf.sprintf "%s/connections/%d/write" path id in
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let write_fd = Unix.(openfile write_path [O_WRONLY] 0o000) in
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finally (fun () ->
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f write_path write_fd
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) (fun () ->
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Unix.close write_fd;
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Unix.unlink write_path
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)
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let read_opts id = with_reader id (fun read_path read_fd ->
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let sz = 512 in
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let buf = Bytes.create sz in
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let n = Unix.read read_fd buf 0 sz in
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let opts = Stringext.split ~on:'\000' (Bytes.sub buf 0 n) in
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Array.of_list opts
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)
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let get_fuse_sock opts =
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let wsock, rsock = Unix.(socketpair PF_UNIX SOCK_STREAM 0) in
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let wfd = Fd_send_recv.int_of_fd wsock in
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let opts = Array.append [|fusermount|] opts in
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let pid = Unix.(create_process_env fusermount opts
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[|"_FUSE_COMMFD="^(string_of_int wfd)|]
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stdin stdout stderr) in
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let _, status = Unix.waitpid [] pid in
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let () = Unix.(shutdown wsock SHUTDOWN_ALL) in
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match check_status status with
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| Result.Error str ->
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let opts = String.concat " " (Array.to_list opts) in
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Log.fatal "%s: %s" opts str
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| Result.Ok () ->
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(* We must read at least 1 byte, by POSIX! *)
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let _, _, fd = Fd_send_recv.recv_fd rsock "\000" 0 1 [] in
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let () = Unix.(shutdown rsock SHUTDOWN_ALL) in
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fd
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(* readers fork into a new process *)
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let start_reader id fuse =
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match try_fork "start_reader" with
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| 0 -> (* child *)
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with_reader id (fun _read_path read_fd ->
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copy ("reader_"^string_of_int id) fuse read_fd
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)
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| _child_pid -> (* parent *)
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()
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(* writers stay in the calling process *)
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let start_writer id fuse = with_writer id (fun write_path write_fd ->
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copy ("writer_"^string_of_int id) write_fd fuse
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)
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let handle_connection id =
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Log.info "handle_connection %d" id;
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match try_fork "handle_connection" with
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| 0 -> (* child *)
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let opts = read_opts id in
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let fuse = get_fuse_sock opts in
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start_reader id fuse;
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begin try ignore (start_writer id fuse); exit 0
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with
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| e -> prerr_endline (Printexc.to_string e); exit 1
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end
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| _child_pid -> (* parent *)
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()
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let connection_loop () =
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let events = Unix.(openfile events_path [O_RDONLY] 0o000) in
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(* 512 bytes is easily big enough to read a whole connection id *)
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let sz = 512 in
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let buf = Bytes.create sz in
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let rec recv () =
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begin try
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let n = Unix.read events buf 0 sz in
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let s = String.trim Bytes.(to_string (sub buf 0 n)) in
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let id = int_of_string s in
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handle_connection id;
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with
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| Unix.Unix_error (err,"read",path) ->
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Log.fatal "Error reading events file %s: %s"
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path (Unix.error_message err)
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| Failure "int_of_string" ->
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Log.fatal "Failed to parse integer connection id"
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end;
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recv ()
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in
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recv ()
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;;
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connection_loop ()
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