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ssh: do_start_subsystem added, skip system_sup for client
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@u3s
u3s committed Sep 4, 2024
1 parent d0ebd57 commit 23d5c7d
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Showing 4 changed files with 107 additions and 85 deletions.
11 changes: 4 additions & 7 deletions lib/ssh/src/ssh.erl
View file
Original file line number Diff line number Diff line change
Expand Up @@ -610,8 +610,7 @@ daemon(Host0, Port0, UserOptions0) when 0 =< Port0, Port0 =< 65535,

%% throws error:Error if no usable hostkey is found
ssh_connection_handler:available_hkey_algorithms(server, Options1),
ssh_system_sup:start_system(server,
#address{address = Host,
ssh_system_sup:start_system(#address{address = Host,
port = Port,
profile = ?GET_OPT(profile,Options1)},
Options1)
Expand Down Expand Up @@ -799,16 +798,15 @@ stop_listener(Address, Port, Profile) ->
lists:foreach(fun({Sup,_Addr}) ->
stop_listener(Sup)
end,
ssh_system_sup:addresses(server,
#address{address=Address,
ssh_system_sup:addresses(#address{address=Address,
port=Port,
profile=Profile})).

-doc(#{equiv => stop_daemon/3}).
-spec stop_daemon(DaemonRef::daemon_ref()) -> ok.

stop_daemon(SysSup) ->
ssh_system_sup:stop_system(server, SysSup).
ssh_system_sup:stop_system(SysSup).


-doc(#{equiv => stop_daemon/3}).
Expand All @@ -826,8 +824,7 @@ stop_daemon(Address, Port, Profile) ->
lists:foreach(fun({Sup,_Addr}) ->
stop_daemon(Sup)
end,
ssh_system_sup:addresses(server,
#address{address=Address,
ssh_system_sup:addresses(#address{address=Address,
port=Port,
profile=Profile})).

Expand Down
40 changes: 31 additions & 9 deletions lib/ssh/src/ssh_info.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -132,24 +132,36 @@ format_sup(server, {{{ssh_system_sup,LocalAddress},Pid,supervisor,[ssh_system_su
walk_tree(server, Children, ?inc(Indent)),
io_lib:nl() % Separate system supervisors by an empty line
];
format_sup(client, {{{ssh_system_sup,LocalAddress},Pid,supervisor,[ssh_system_sup]}, _Spec, Children}, Indent) ->
[indent(Indent),
io_lib:format("Local: ~s sys_sup=~s~n", [format_address(LocalAddress), print_pid(Pid)]),
walk_tree(client, Children, ?inc(Indent)),
io_lib:nl() % Separate system supervisors by an empty line
format_sup(client,
{{Ref,SubSysSup,supervisor,[ssh_subsystem_sup]}, _SubSysSpec,
[{{connection,ConnPid,worker,[ssh_connection_handler]}, _ConnSpec}
| Children]
},
Indent) when is_reference(Ref) ->
[io_lib:format("~sLocal: ~s~n"
"~sRemote: ~s (Version: ~s)~n"
"~sConnectionRef=~s, subsys_sup=~s~n",
[indent(Indent), local_addr(ConnPid),
indent(Indent), peer_addr(ConnPid), peer_version(client,ConnPid),
indent(Indent), print_pid(ConnPid), print_pid(SubSysSup)
]),
walk_tree(client,
[{H,{connref,ConnPid},Cs} || {H,_,Cs} <- Children],
?inc(Indent)),
io_lib:nl() % Separate sub system supervisors by an empty line
];
format_sup(Role,
format_sup(server,
{{Ref,SubSysSup,supervisor,[ssh_subsystem_sup]}, _SubSysSpec,
[{{connection,ConnPid,worker,[ssh_connection_handler]}, _ConnSpec}
| Children]
},
Indent) when is_reference(Ref) ->
[io_lib:format("~sRemote: ~s (Version: ~s)~n"
"~sConnectionRef=~s, subsys_sup=~s~n",
[indent(Indent), peer_addr(ConnPid), peer_version(Role,ConnPid),
[indent(Indent), peer_addr(ConnPid), peer_version(server,ConnPid),
indent(Indent), print_pid(ConnPid), print_pid(SubSysSup)
]),
walk_tree(Role,
walk_tree(server,
[{H,{connref,ConnPid},Cs} || {H,_,Cs} <- Children],
?inc(Indent)),
io_lib:nl() % Separate sub system supervisors by an empty line
Expand Down Expand Up @@ -251,7 +263,17 @@ peer_addr(Pid) ->
catch
_:_ -> "?"
end.


local_addr(Pid) ->
try
[{socket,Socket}] =
ssh_connection_handler:connection_info(Pid, [socket]),
{ok, AddrPort} = inet:sockname(Socket),
ssh_lib:format_address_port(AddrPort)
catch
_:_ -> "?"
end.


format_address(#address{address=Addr, port=Port, profile=Prof}) ->
io_lib:format("~s (profile ~p)", [ssh_lib:format_address_port({Addr,Port}),Prof]);
Expand Down
122 changes: 64 additions & 58 deletions lib/ssh/src/ssh_system_sup.erl
View file
Original file line number Diff line number Diff line change
Expand Up @@ -34,11 +34,11 @@

-export([start_link/3,
stop_listener/1,
stop_system/2,
start_system/3,
stop_system/1,
start_system/2,
start_subsystem/4,
get_daemon_listen_address/1,
addresses/2,
addresses/1,
get_options/2,
get_acceptor_options/1,
replace_acceptor_options/2
Expand All @@ -51,29 +51,27 @@
%%% API
%%%=========================================================================

start_system(Role, Address0, Options) ->
case find_system_sup(Role, Address0) of
{ok,{SysPid,Address}} when Role =:= server->
start_system(Address0, Options) ->
case find_system_sup(Address0) of
{ok,{SysPid,Address}} ->
restart_acceptor(SysPid, Address, Options);
{ok,{SysPid,_}}->
{ok,SysPid};
{error,not_found} ->
supervisor:start_child(sup(Role),
supervisor:start_child(sshd_sup,
#{id => {?MODULE,Address0},
start => {?MODULE, start_link, [Role, Address0, Options]},
start => {?MODULE, start_link, [server, Address0, Options]},
restart => temporary,
type => supervisor
})
end.

%%%----------------------------------------------------------------
stop_system(Role, SysSup) when is_pid(SysSup) ->
case lists:keyfind(SysSup, 2, supervisor:which_children(sup(Role))) of
{{?MODULE, Id}, SysSup, _, _} -> stop_system(Role, Id);
stop_system(SysSup) when is_pid(SysSup) ->
case lists:keyfind(SysSup, 2, supervisor:which_children(sup(server))) of
{{?MODULE, Id}, SysSup, _, _} -> stop_system(Id);
false -> ok
end;
stop_system(Role, Id) ->
supervisor:terminate_child(sup(Role), {?MODULE, Id}).
stop_system(Id) ->
supervisor:terminate_child(sup(server), {?MODULE, Id}).


%%%----------------------------------------------------------------
Expand All @@ -96,42 +94,49 @@ get_daemon_listen_address(SystemSup) ->
end.

%%%----------------------------------------------------------------
%%% Start the subsystem child. It is a child of the system supervisor (callback = this module)
start_subsystem(Role, Address=#address{}, Socket, Options0) ->
Options = ?PUT_INTERNAL_OPT([{user_pid, self()}], Options0),
%%% Start the subsystem child. It is a significant child of the system
%%% supervisor (callback = this module) for server and non-significant
%%% child of sshc_sup for client
start_subsystem(Role = client, _, Socket, Options) ->
do_start_subsystem(Role, sup(client), false, Socket, Options);
start_subsystem(Role = server, Address=#address{}, Socket, Options) ->
case get_system_sup(Address, Options) of
{ok, SysPid} ->
do_start_subsystem(Role, SysPid, true, Socket, Options);
Others ->
Others
end.

do_start_subsystem(Role, SupPid, Significant, Socket, Options0) ->
Id = make_ref(),
case get_system_sup(Role, Address, Options) of
{ok,SysPid} ->
case supervisor:start_child(SysPid,
#{id => Id,
start => {ssh_subsystem_sup, start_link,
[Role,Id,Socket,Options]
},
restart => temporary,
significant => true,
type => supervisor
})
of
{ok,_SubSysPid} ->
try
receive
{new_connection_ref, Id, ConnPid} ->
ssh_connection_handler:takeover(ConnPid, Role, Socket, Options)
after 10000 ->
error(timeout)
end
catch
error:{badmatch,{error,Error}} ->
{error,Error};
error:timeout ->
%% The connection was started, but the takover procedure timed out,
%% therefore it exists a subtree, but it is not quite ready and
%% must be removed (by the supervisor above):
supervisor:terminate_child(SysPid, Id),
{error, connection_start_timeout}
end;
Others ->
Others
Options = ?PUT_INTERNAL_OPT([{user_pid, self()}], Options0),
case supervisor:start_child(SupPid,
#{id => Id,
start => {ssh_subsystem_sup, start_link,
[Role,Id,Socket,Options]
},
restart => temporary,
significant => Significant,
type => supervisor
})
of
{ok,_SubSysPid} ->
try
receive
{new_connection_ref, Id, ConnPid} ->
ssh_connection_handler:takeover(ConnPid, Role, Socket, Options)
after 10000 ->
error(timeout)
end
catch
error:{badmatch,{error,Error}} ->
{error,Error};
error:timeout ->
%% The connection was started, but the takover procedure timed out,
%% therefore it exists a subtree, but it is not quite ready and
%% must be removed (by the supervisor above):
supervisor:terminate_child(SupPid, Id),
{error, connection_start_timeout}
end;
Others ->
Others
Expand All @@ -142,9 +147,9 @@ start_link(Role, Address, Options) ->
supervisor:start_link(?MODULE, [Role, Address, Options]).

%%%----------------------------------------------------------------
addresses(Role, #address{address=Address, port=Port, profile=Profile}) ->
addresses(#address{address=Address, port=Port, profile=Profile}) ->
[{SysSup,A} || {{ssh_system_sup,A},SysSup,supervisor,_} <-
supervisor:which_children(sup(Role)),
supervisor:which_children(sshd_sup),
Address == any orelse A#address.address == Address,
Port == any orelse A#address.port == Port,
Profile == any orelse A#address.profile == Profile].
Expand Down Expand Up @@ -228,19 +233,20 @@ acceptor_sup_child_spec(SysSup, Address, Options) ->
lookup(SupModule, SystemSup) ->
lists:keyfind([SupModule], 4, supervisor:which_children(SystemSup)).

get_system_sup(Role, Address0, Options) ->
case find_system_sup(Role, Address0) of
get_system_sup(Address0, Options) ->
case find_system_sup(Address0) of
{ok,{SysPid,_Address}} ->
{ok,SysPid};
{error,not_found} ->
start_system(Role, Address0, Options);
start_system(Address0, Options);
{error,Error} ->
{error,Error}
end.

find_system_sup(Role, Address0) ->
case addresses(Role, Address0) of
[{SysSupPid,Address}] -> {ok,{SysSupPid,Address}};
find_system_sup(Address0) ->
case addresses(Address0) of
[{SysSupPid,Address}] ->
{ok,{SysSupPid,Address}};
[] -> {error,not_found};
[_,_|_] -> {error,ambiguous}
end.
Expand Down
19 changes: 8 additions & 11 deletions lib/ssh/test/ssh_sup_SUITE.erl
View file
Original file line number Diff line number Diff line change
Expand Up @@ -129,25 +129,22 @@ sshc_subtree(Config) when is_list(Config) ->
{user, ?USER},
{password, ?PASSWD},
{user_dir, UserDir}]),
?wait_match([?SYSTEM_SUP(SysSup,
#address{address=LocalIP,
port=LocalPort,
profile=?DEFAULT_PROFILE})],
?wait_match([?SUB_SYSTEM_SUP(SubSysSup)],
supervisor:which_children(sshc_sup),
[SysSup, LocalIP, LocalPort]),
check_sshc_system_tree(SysSup, Pid1, LocalIP, LocalPort, Config),
[SubSysSup]),
check_sshc_system_tree(SubSysSup, Pid1, Config),
Pid2 = ssh_test_lib:connect(Host, Port, [{silently_accept_hosts, true},
{save_accepted_host, false},
{user_interaction, false},
{user, ?USER},
{password, ?PASSWD},
{user_dir, UserDir}]),
?wait_match([?SYSTEM_SUP(_,_),
?SYSTEM_SUP(_,_)
?wait_match([?SUB_SYSTEM_SUP(_),
?SUB_SYSTEM_SUP(_)
],
supervisor:which_children(sshc_sup)),
ssh:close(Pid1),
?wait_match([?SYSTEM_SUP(_,_)
?wait_match([?SUB_SYSTEM_SUP(_)
],
supervisor:which_children(sshc_sup)),
ssh:close(Pid2),
Expand Down Expand Up @@ -415,9 +412,9 @@ check_sshd_system_tree(Daemon, Host, Port, Config) ->
ssh:close(ClientConn).


check_sshc_system_tree(SysSup, Connection, _LocalIP, _LocalPort, _Config) ->
check_sshc_system_tree(SubSysSup, Connection, _Config) ->
?wait_match([?SUB_SYSTEM_SUP(SubSysSup)],
supervisor:which_children(SysSup),
supervisor:which_children(sshc_sup),
[SubSysSup]),
?wait_match([{_,FwdAccSup, supervisor,[ssh_tcpip_forward_acceptor_sup]},
{_,_,supervisor,[ssh_channel_sup]},
Expand Down

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