523 lines
20 KiB
Erlang
523 lines
20 KiB
Erlang
%% -------------------------------------------------------------------
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%%
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%% Copyright (c) 2007-2015 Basho Technologies, Inc. All Rights Reserved.
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%%
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%% This file is provided to you under the Apache License,
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%% Version 2.0 (the "License"); you may not use this file
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%% except in compliance with the License. You may obtain
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%% a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing,
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%% software distributed under the License is distributed on an
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%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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%% KIND, either express or implied. See the License for the
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%% specific language governing permissions and limitations
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%% under the License.
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%%
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%% -------------------------------------------------------------------
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-module(machi_flu1).
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-include_lib("kernel/include/file.hrl").
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-include("machi.hrl").
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-export([start_link/1, stop/1]).
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-record(state, {
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reg_name :: atom(),
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tcp_port :: non_neg_integer(),
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data_dir :: string(),
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wedge = true :: 'disabled' | boolean(),
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my_epoch_id :: 'undefined',
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dbg_props = [] :: list(), % proplist
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props = [] :: list() % proplist
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}).
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start_link([{FluName, TcpPort, DataDir}|Rest])
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when is_atom(FluName), is_integer(TcpPort), is_list(DataDir) ->
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{ok, spawn_link(fun() -> main2(FluName, TcpPort, DataDir, Rest) end)}.
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stop(Pid) ->
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case erlang:is_process_alive(Pid) of
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true ->
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Pid ! forever,
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ok;
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false ->
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error
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end.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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main2(RegName, TcpPort, DataDir, Rest) ->
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S1 = #state{reg_name=RegName,
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tcp_port=TcpPort,
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data_dir=DataDir,
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props=Rest},
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S2 = case proplists:get_value(dbg, Rest) of
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undefined ->
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S1;
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DbgProps ->
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S1#state{wedge=disabled,
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dbg_props=DbgProps,
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props=lists:keydelete(dbg, 1, Rest)}
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end,
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AppendPid = start_append_server(S2),
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ListenPid = start_listen_server(S2),
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put(flu_reg_name, RegName),
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put(flu_append_pid, AppendPid),
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put(flu_listen_pid, ListenPid),
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receive forever -> ok end.
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start_listen_server(S) ->
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spawn_link(fun() -> run_listen_server(S) end).
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start_append_server(S) ->
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spawn_link(fun() -> run_append_server(S) end).
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run_listen_server(#state{tcp_port=TcpPort}=S) ->
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SockOpts = [{reuseaddr, true},
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{mode, binary}, {active, false}, {packet, line}],
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{ok, LSock} = gen_tcp:listen(TcpPort, SockOpts),
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listen_server_loop(LSock, S).
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run_append_server(#state{reg_name=Name}=S) ->
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register(Name, self()),
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append_server_loop(S).
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listen_server_loop(LSock, S) ->
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{ok, Sock} = gen_tcp:accept(LSock),
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spawn_link(fun() -> net_server_loop(Sock, S) end),
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listen_server_loop(LSock, S).
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append_server_loop(#state{data_dir=DataDir}=S) ->
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receive
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{seq_append, From, Prefix, Chunk, CSum} ->
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spawn(fun() -> append_server_dispatch(From, Prefix, Chunk, CSum,
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DataDir) end),
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append_server_loop(S)
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end.
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-define(EpochIDSpace, (4+20)).
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net_server_loop(Sock, #state{reg_name=RegName, data_dir=DataDir}=S) ->
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ok = inet:setopts(Sock, [{packet, line}]),
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case gen_tcp:recv(Sock, 0, 60*1000) of
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{ok, Line} ->
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%% machi_util:verb("Got: ~p\n", [Line]),
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PrefixLenLF = byte_size(Line) - 2 - ?EpochIDSpace - 8 - 1,
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FileLenLF = byte_size(Line) - 2 - ?EpochIDSpace - 16 - 8 - 1,
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CSumFileLenLF = byte_size(Line) - 2 - ?EpochIDSpace - 1,
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WriteFileLenLF = byte_size(Line) - 7 - ?EpochIDSpace - 16 - 8 - 1,
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DelFileLenLF = byte_size(Line) - 14 - ?EpochIDSpace - 1,
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case Line of
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%% For normal use
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<<"A ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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LenHex:8/binary,
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Prefix:PrefixLenLF/binary, "\n">> ->
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do_net_server_append(RegName, Sock, LenHex, Prefix);
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<<"R ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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OffsetHex:16/binary, LenHex:8/binary,
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File:FileLenLF/binary, "\n">> ->
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do_net_server_read(Sock, OffsetHex, LenHex, File, DataDir);
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<<"L ", _EpochIDRaw:(?EpochIDSpace)/binary, "\n">> ->
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do_net_server_listing(Sock, DataDir);
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<<"C ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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File:CSumFileLenLF/binary, "\n">> ->
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do_net_server_checksum_listing(Sock, File, DataDir);
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<<"QUIT\n">> ->
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catch gen_tcp:close(Sock),
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exit(normal);
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<<"QUIT\r\n">> ->
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catch gen_tcp:close(Sock),
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exit(normal);
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%% For "internal" replication only.
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<<"W-repl ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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OffsetHex:16/binary, LenHex:8/binary,
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File:WriteFileLenLF/binary, "\n">> ->
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do_net_server_write(Sock, OffsetHex, LenHex, File, DataDir);
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%% For data migration only.
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<<"DEL-migration ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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File:DelFileLenLF/binary, "\n">> ->
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do_net_server_delete_migration_only(Sock, File, DataDir);
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%% For erasure coding hackityhack
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<<"TRUNC-hack--- ",
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_EpochIDRaw:(?EpochIDSpace)/binary,
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File:DelFileLenLF/binary, "\n">> ->
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do_net_server_truncate_hackityhack(Sock, File, DataDir);
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_ ->
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machi_util:verb("Else Got: ~p\n", [Line]),
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gen_tcp:send(Sock, "ERROR SYNTAX\n"),
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catch gen_tcp:close(Sock),
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exit(normal)
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end,
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net_server_loop(Sock, S);
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_ ->
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catch gen_tcp:close(Sock),
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exit(normal)
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end.
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append_server_dispatch(From, Prefix, Chunk, CSum, DataDir) ->
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Pid = write_server_get_pid(Prefix, DataDir),
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Pid ! {seq_append, From, Prefix, Chunk, CSum},
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exit(normal).
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do_net_server_append(RegName, Sock, LenHex, Prefix) ->
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%% TODO: robustify against other invalid path characters such as NUL
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case sanitize_file_string(Prefix) of
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ok ->
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do_net_server_append2(RegName, Sock, LenHex, Prefix);
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_ ->
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ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG">>)
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end.
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sanitize_file_string(Str) ->
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case re:run(Str, "/") of
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nomatch ->
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ok;
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_ ->
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error
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end.
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do_net_server_append2(RegName, Sock, LenHex, Prefix) ->
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<<Len:32/big>> = machi_util:hexstr_to_bin(LenHex),
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ok = inet:setopts(Sock, [{packet, raw}]),
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{ok, Chunk} = gen_tcp:recv(Sock, Len, 60*1000),
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CSum = machi_util:checksum(Chunk),
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try
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RegName ! {seq_append, self(), Prefix, Chunk, CSum}
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catch error:badarg ->
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error_logger:error_msg("Message send to ~p gave badarg, make certain server is running with correct registered name\n", [?MODULE])
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end,
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receive
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{assignment, Offset, File} ->
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OffsetHex = machi_util:bin_to_hexstr(<<Offset:64/big>>),
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Out = io_lib:format("OK ~s ~s\n", [OffsetHex, File]),
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ok = gen_tcp:send(Sock, Out)
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after 10*1000 ->
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ok = gen_tcp:send(Sock, "TIMEOUT\n")
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end.
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do_net_server_read(Sock, OffsetHex, LenHex, FileBin, DataDir) ->
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DoItFun = fun(FH, Offset, Len) ->
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case file:pread(FH, Offset, Len) of
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{ok, Bytes} when byte_size(Bytes) == Len ->
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gen_tcp:send(Sock, ["OK\n", Bytes]);
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{ok, Bytes} ->
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machi_util:verb("ok read but wanted ~p got ~p: ~p @ offset ~p\n",
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[Len, size(Bytes), FileBin, Offset]),
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ok = gen_tcp:send(Sock, "ERROR PARTIAL-READ\n");
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eof ->
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perhaps_do_net_server_ec_read(Sock, FH);
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_Else2 ->
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machi_util:verb("Else2 ~p ~p ~P\n",
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[Offset, Len, _Else2, 20]),
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ok = gen_tcp:send(Sock, "ERROR BAD-READ\n")
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end
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end,
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do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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[read, binary, raw], DoItFun).
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do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun) ->
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case sanitize_file_string(FileBin) of
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ok ->
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do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin,
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DataDir, FileOpts, DoItFun);
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_ ->
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ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
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end.
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do_net_server_readwrite_common2(Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun) ->
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<<Offset:64/big>> = machi_util:hexstr_to_bin(OffsetHex),
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<<Len:32/big>> = machi_util:hexstr_to_bin(LenHex),
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{_, Path} = machi_util:make_data_filename(DataDir, FileBin),
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OptsHasWrite = lists:member(write, FileOpts),
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case file:open(Path, FileOpts) of
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{ok, FH} ->
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try
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DoItFun(FH, Offset, Len)
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after
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file:close(FH)
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end;
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{error, enoent} when OptsHasWrite ->
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ok = filelib:ensure_dir(Path),
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do_net_server_readwrite_common(
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Sock, OffsetHex, LenHex, FileBin, DataDir,
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FileOpts, DoItFun);
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_Else ->
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%%%%%% keep?? machi_util:verb("Else ~p ~p ~p ~p\n", [Offset, Len, Path, _Else]),
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ok = gen_tcp:send(Sock, <<"ERROR BAD-IO\n">>)
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end.
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do_net_server_write(Sock, OffsetHex, LenHex, FileBin, DataDir) ->
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CSumPath = machi_util:make_checksum_filename(DataDir, FileBin),
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case file:open(CSumPath, [append, raw, binary, delayed_write]) of
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{ok, FHc} ->
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do_net_server_write2(Sock, OffsetHex, LenHex, FileBin, DataDir, FHc);
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{error, enoent} ->
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ok = filelib:ensure_dir(CSumPath),
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do_net_server_write(Sock, OffsetHex, LenHex, FileBin, DataDir)
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end.
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do_net_server_write2(Sock, OffsetHex, LenHex, FileBin, DataDir, FHc) ->
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DoItFun = fun(FHd, Offset, Len) ->
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ok = inet:setopts(Sock, [{packet, raw}]),
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{ok, Chunk} = gen_tcp:recv(Sock, Len),
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CSum = machi_util:checksum(Chunk),
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case file:pwrite(FHd, Offset, Chunk) of
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ok ->
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CSumHex = machi_util:bin_to_hexstr(CSum),
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CSum_info = [OffsetHex, 32, LenHex, 32, CSumHex, 10],
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ok = file:write(FHc, CSum_info),
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ok = file:close(FHc),
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gen_tcp:send(Sock, <<"OK\n">>);
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_Else3 ->
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machi_util:verb("Else3 ~p ~p ~p\n",
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[Offset, Len, _Else3]),
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ok = gen_tcp:send(Sock, "ERROR BAD-PWRITE\n")
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end
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end,
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do_net_server_readwrite_common(Sock, OffsetHex, LenHex, FileBin, DataDir,
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[write, read, binary, raw], DoItFun).
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perhaps_do_net_server_ec_read(Sock, FH) ->
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case file:pread(FH, 0, ?MINIMUM_OFFSET) of
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{ok, Bin} when byte_size(Bin) == ?MINIMUM_OFFSET ->
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decode_and_reply_net_server_ec_read(Sock, Bin);
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{ok, _AnythingElse} ->
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ok = gen_tcp:send(Sock, "ERROR PARTIAL-READ2\n");
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_AnythingElse ->
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ok = gen_tcp:send(Sock, "ERROR BAD-PREAD\n")
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end.
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decode_and_reply_net_server_ec_read(Sock, <<"a ", Rest/binary>>) ->
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decode_and_reply_net_server_ec_read_version_a(Sock, Rest);
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decode_and_reply_net_server_ec_read(Sock, <<0:8, _/binary>>) ->
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ok = gen_tcp:send(Sock, <<"ERROR NOT-ERASURE\n">>).
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decode_and_reply_net_server_ec_read_version_a(Sock, Rest) ->
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%% <<BodyLenHex:4/binary, " ", StripeWidthHex:16/binary, " ",
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%% OrigFileLenHex:16/binary, " ", _/binary>> = Rest,
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HdrLen = 80 - 2 - 4 - 1,
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<<BodyLenHex:4/binary, " ", Hdr:HdrLen/binary, Rest2/binary>> = Rest,
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<<BodyLen:16/big>> = machi_util:hexstr_to_bin(BodyLenHex),
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<<Body:BodyLen/binary, _/binary>> = Rest2,
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ok = gen_tcp:send(Sock, ["ERASURE ", BodyLenHex, " ", Hdr, Body]).
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do_net_server_listing(Sock, DataDir) ->
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Files = filelib:wildcard("*", DataDir) -- ["config"],
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Out = ["OK\n",
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[begin
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{ok, FI} = file:read_file_info(DataDir ++ "/" ++ File),
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Size = FI#file_info.size,
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SizeBin = <<Size:64/big>>,
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[machi_util:bin_to_hexstr(SizeBin), <<" ">>,
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list_to_binary(File), <<"\n">>]
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end || File <- Files],
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".\n"
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],
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ok = gen_tcp:send(Sock, Out).
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do_net_server_checksum_listing(Sock, File, DataDir) ->
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case sanitize_file_string(File) of
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ok ->
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do_net_server_checksum_listing2(Sock, File, DataDir);
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_ ->
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ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
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end.
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do_net_server_checksum_listing2(Sock, File, DataDir) ->
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ok = sync_checksum_file(File),
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CSumPath = machi_util:make_checksum_filename(DataDir, File),
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case file:open(CSumPath, [read, raw, binary]) of
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{ok, FH} ->
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{ok, FI} = file:read_file_info(CSumPath),
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Len = FI#file_info.size,
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LenHex = list_to_binary(machi_util:bin_to_hexstr(<<Len:64/big>>)),
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%% Client has option of line-by-line with "." terminator,
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%% or using the offset in the OK message to slurp things
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%% down by exact byte size.
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ok = gen_tcp:send(Sock, [<<"OK ">>, LenHex, <<"\n">>]),
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do_net_copy_bytes(FH, Sock),
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ok = file:close(FH),
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ok = gen_tcp:send(Sock, ".\n");
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{error, enoent} ->
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ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
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_ ->
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ok = gen_tcp:send(Sock, "ERROR\n")
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end.
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sync_checksum_file(File) ->
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Prefix = re:replace(File, "\\..*", "", [{return, binary}]),
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case write_server_find_pid(Prefix) of
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undefined ->
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ok;
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Pid ->
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Ref = make_ref(),
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Pid ! {sync_stuff, self(), Ref},
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receive
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{sync_finished, Ref} ->
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ok
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after 5000 ->
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case write_server_find_pid(Prefix) of
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undefined ->
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ok;
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Pid2 when Pid2 /= Pid ->
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ok;
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_Pid2 ->
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error
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end
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end
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end.
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do_net_copy_bytes(FH, Sock) ->
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case file:read(FH, 1024*1024) of
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{ok, Bin} ->
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ok = gen_tcp:send(Sock, Bin),
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do_net_copy_bytes(FH, Sock);
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eof ->
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ok
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end.
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do_net_server_delete_migration_only(Sock, File, DataDir) ->
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case sanitize_file_string(File) of
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ok ->
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do_net_server_delete_migration_only2(Sock, File, DataDir);
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_ ->
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ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
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end.
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do_net_server_delete_migration_only2(Sock, File, DataDir) ->
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{_, Path} = machi_util:make_data_filename(DataDir, File),
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case file:delete(Path) of
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ok ->
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ok = gen_tcp:send(Sock, "OK\n");
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{error, enoent} ->
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ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
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_ ->
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ok = gen_tcp:send(Sock, "ERROR\n")
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end.
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do_net_server_truncate_hackityhack(Sock, File, DataDir) ->
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case sanitize_file_string(File) of
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ok ->
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do_net_server_truncate_hackityhack2(Sock, File, DataDir);
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_ ->
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ok = gen_tcp:send(Sock, <<"ERROR BAD-ARG\n">>)
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end.
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do_net_server_truncate_hackityhack2(Sock, File, DataDir) ->
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{_, Path} = machi_util:make_data_filename(DataDir, File),
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case file:open(Path, [read, write, binary, raw]) of
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{ok, FH} ->
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try
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{ok, ?MINIMUM_OFFSET} = file:position(FH, ?MINIMUM_OFFSET),
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ok = file:truncate(FH),
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ok = gen_tcp:send(Sock, "OK\n")
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after
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file:close(FH)
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end;
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{error, enoent} ->
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ok = gen_tcp:send(Sock, "ERROR NO-SUCH-FILE\n");
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_ ->
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ok = gen_tcp:send(Sock, "ERROR\n")
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end.
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write_server_get_pid(Prefix, DataDir) ->
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case write_server_find_pid(Prefix) of
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undefined ->
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start_seq_append_server(Prefix, DataDir),
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timer:sleep(1),
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write_server_get_pid(Prefix, DataDir);
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Pid ->
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Pid
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end.
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|
|
write_server_find_pid(Prefix) ->
|
|
RegName = machi_util:make_regname(Prefix),
|
|
whereis(RegName).
|
|
|
|
start_seq_append_server(Prefix, DataDir) ->
|
|
spawn_link(fun() -> run_seq_append_server(Prefix, DataDir) end).
|
|
|
|
run_seq_append_server(Prefix, DataDir) ->
|
|
true = register(machi_util:make_regname(Prefix), self()),
|
|
ok = filelib:ensure_dir(DataDir ++ "/unused"),
|
|
ok = filelib:ensure_dir(DataDir ++ "/config/unused"),
|
|
run_seq_append_server2(Prefix, DataDir).
|
|
|
|
run_seq_append_server2(Prefix, DataDir) ->
|
|
FileNum = machi_util:read_max_filenum(DataDir, Prefix) + 1,
|
|
case machi_util:increment_max_filenum(DataDir, Prefix) of
|
|
ok ->
|
|
machi_util:increment_max_filenum(DataDir, Prefix),
|
|
machi_util:info_msg("start: ~p server at file ~w\n",
|
|
[Prefix, FileNum]),
|
|
seq_append_server_loop(DataDir, Prefix, FileNum);
|
|
Else ->
|
|
error_logger:error_msg("start: ~p server at file ~w: ~p\n",
|
|
[Prefix, FileNum, Else]),
|
|
exit(Else)
|
|
|
|
end.
|
|
|
|
seq_append_server_loop(DataDir, Prefix, FileNum) ->
|
|
SequencerNameHack = lists:flatten(io_lib:format(
|
|
"~.36B~.36B",
|
|
[element(3,now()),
|
|
list_to_integer(os:getpid())])),
|
|
{File, FullPath} = machi_util:make_data_filename(
|
|
DataDir, Prefix, SequencerNameHack, FileNum),
|
|
{ok, FHd} = file:open(FullPath,
|
|
[write, binary, raw]),
|
|
%% [write, binary, raw, delayed_write]),
|
|
CSumPath = machi_util:make_checksum_filename(
|
|
DataDir, Prefix, SequencerNameHack, FileNum),
|
|
{ok, FHc} = file:open(CSumPath, [append, raw, binary, delayed_write]),
|
|
seq_append_server_loop(DataDir, Prefix, File, {FHd,FHc}, FileNum,
|
|
?MINIMUM_OFFSET).
|
|
|
|
seq_append_server_loop(DataDir, Prefix, _File, {FHd,FHc}, FileNum, Offset)
|
|
when Offset > ?MAX_FILE_SIZE ->
|
|
ok = file:close(FHd),
|
|
ok = file:close(FHc),
|
|
machi_util:info_msg("rollover: ~p server at file ~w offset ~w\n",
|
|
[Prefix, FileNum, Offset]),
|
|
run_seq_append_server2(Prefix, DataDir);
|
|
seq_append_server_loop(DataDir, Prefix, File, {FHd,FHc}=FH_, FileNum, Offset) ->
|
|
receive
|
|
{seq_append, From, Prefix, Chunk, CSum} ->
|
|
ok = file:pwrite(FHd, Offset, Chunk),
|
|
From ! {assignment, Offset, File},
|
|
Len = byte_size(Chunk),
|
|
OffsetHex = machi_util:bin_to_hexstr(<<Offset:64/big>>),
|
|
LenHex = machi_util:bin_to_hexstr(<<Len:32/big>>),
|
|
CSumHex = machi_util:bin_to_hexstr(CSum),
|
|
CSum_info = [OffsetHex, 32, LenHex, 32, CSumHex, 10],
|
|
ok = file:write(FHc, CSum_info),
|
|
seq_append_server_loop(DataDir, Prefix, File, FH_,
|
|
FileNum, Offset + Len);
|
|
{sync_stuff, FromPid, Ref} ->
|
|
file:sync(FHc),
|
|
FromPid ! {sync_finished, Ref},
|
|
seq_append_server_loop(DataDir, Prefix, File, FH_,
|
|
FileNum, Offset)
|
|
after 30*1000 ->
|
|
ok = file:close(FHd),
|
|
ok = file:close(FHc),
|
|
machi_util:info_msg("stop: ~p server at file ~w offset ~w\n",
|
|
[Prefix, FileNum, Offset]),
|
|
exit(normal)
|
|
end.
|
|
|