mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-12-22 22:31:30 +03:00
khan: refactor, fix memory issues
Goes ahead and makes the socket its own separate data structure linked from u3_khan. Makes it easier to get proper links to everything without fiddling with offsetof. Seems to resolve the memory corruption issues we were seeing. Also make an effort to shutdown / close resources on exit.
This commit is contained in:
Jōshin
parent
dd5b833b2d
commit
e56ab9da1d
@ -16,17 +16,24 @@
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typedef struct _u3_chan {
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uv_pipe_t pyp_u; // client stream handler
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c3_w coq_l; // connection number
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struct _u3_khan* cop_u; // control plane backlink
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struct _u3_shan* san_u; // server backpointer
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struct _u3_chan* nex_u; // next in list
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} u3_chan;
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/* u3_khan: control plane socket
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/* u3_shan: control plane server.
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*/
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typedef struct _u3_shan {
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uv_pipe_t pyp_u; // server stream handler
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struct _u3_chan* can_u; // connection list
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struct _u3_khan* kan_u; // device backpointer
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} u3_shan;
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/* u3_khan: control plane device.
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*/
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typedef struct _u3_khan {
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u3_auto car_u; // driver
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uv_pipe_t pyp_u; // socket
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c3_l sev_l; // instance number
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struct _u3_chan* can_u; // client list
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struct _u3_shan* san_u; // server reference
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} u3_khan;
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static const c3_c URB_SOCK_PATH[] = ".urb/khan.sock";
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@ -95,14 +102,15 @@ _khan_read_cb(uv_stream_t* cli_u, ssize_t red_i, const uv_buf_t* buf_u)
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static void
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_khan_conn_cb(uv_stream_t* sem_u, c3_i tas_i)
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{
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u3_khan* cop_u = (u3_khan*)(sem_u - offsetof(u3_khan, pyp_u));
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u3_shan* san_u = (u3_shan*)sem_u;
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u3_khan* kan_u = san_u->kan_u;
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u3_chan* can_u;
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c3_i err_i;
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can_u = c3_calloc(sizeof(u3_chan));
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can_u->coq_l = ( cop_u->can_u ) ? 1 + cop_u->can_u->coq_l : 0;
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can_u->cop_u = cop_u;
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can_u->nex_u = cop_u->can_u;
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can_u->coq_l = ( san_u->can_u ) ? 1 + san_u->can_u->coq_l : 0;
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can_u->san_u = san_u;
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can_u->nex_u = san_u->can_u;
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if ( 0 != (err_i = uv_pipe_init(u3L, &can_u->pyp_u, 0)) ) {
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u3l_log("khan: client init failed: %s\n", uv_strerror(err_i));
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c3_free(can_u);
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@ -121,8 +129,7 @@ _khan_conn_cb(uv_stream_t* sem_u, c3_i tas_i)
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c3_free(can_u);
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u3_king_bail();
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}
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cop_u->can_u = can_u;
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san_u->can_u = can_u;
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}
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/* _khan_close_cb(): socket close callback.
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@ -130,8 +137,63 @@ _khan_conn_cb(uv_stream_t* sem_u, c3_i tas_i)
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static void
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_khan_close_cb(uv_handle_t* had_u)
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{
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// TODO remove
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u3l_log("khan: socket closed\n");
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c3_free(had_u);
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}
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/* _khan_sock_init(): initialize socket device.
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*/
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static void
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_khan_sock_init(u3_shan* san_u)
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{
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// The full socket path is limited to about 108 characters, and we want it to
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// be relative to the pier. So we save our current path, chdir to the pier,
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// open the socket at the desired path, then chdir back. Hopefully there
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// aren't any threads.
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c3_c pax_c[2048];
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c3_i err_i;
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if ( NULL == getcwd(pax_c, sizeof(pax_c)) ) {
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u3l_log("khan: getcwd: %s\n", uv_strerror(errno));
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u3_king_bail();
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}
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if ( 0 != chdir(u3_Host.dir_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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u3_king_bail();
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}
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if ( 0 != unlink(URB_SOCK_PATH) && errno != ENOENT ) {
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u3l_log("khan: unlink: %s\n", uv_strerror(errno));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_pipe_init(u3L, &san_u->pyp_u, 0)) ) {
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u3l_log("khan: uv_pipe_init: %s\n", uv_strerror(err_i));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_pipe_bind(&san_u->pyp_u, URB_SOCK_PATH)) ) {
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u3l_log("khan: uv_pipe_bind: %s\n", uv_strerror(err_i));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_listen((uv_stream_t*)&san_u->pyp_u, 0,
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_khan_conn_cb)) ) {
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u3l_log("khan: uv_listen: %s\n", uv_strerror(err_i));
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goto _khan_err_unlink;
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}
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if ( 0 != chdir(pax_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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goto _khan_err_close;
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}
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return;
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_khan_err_close:
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uv_close((uv_handle_t*)&san_u->pyp_u, _khan_close_cb);
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_khan_err_unlink:
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if ( 0 != unlink(URB_SOCK_PATH) ) {
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u3l_log("khan: unlink: %s\n", uv_strerror(errno));
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}
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_khan_err_chdir:
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if ( 0 != chdir(pax_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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}
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u3_king_bail();
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}
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/* _khan_born_news(): initialization complete, open socket.
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@ -140,68 +202,22 @@ static void
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_khan_born_news(u3_ovum* egg_u, u3_ovum_news new_e)
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{
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u3_auto* car_u = egg_u->car_u;
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u3_khan* cop_u = (u3_khan*)car_u;
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u3_khan* kan_u = (u3_khan*)car_u;
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if ( u3_ovum_done == new_e ) {
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u3_shan* san_u;
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c3_assert(!kan_u->san_u);
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san_u = c3_calloc(sizeof(*san_u));
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_khan_sock_init(san_u);
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san_u->kan_u = kan_u;
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kan_u->san_u = san_u;
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car_u->liv_o = c3y;
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// Open socket. The full socket path is limited to about 108 characters, and
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// we want it to be relative to the pier. So we save our current path, chdir
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// to the pier, open the socket at the desired path, then chdir back.
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// Hopefully there aren't any threads.
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{
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c3_c pax_c[2048];
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c3_i err_i;
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if ( NULL == getcwd(pax_c, sizeof(pax_c)) ) {
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u3l_log("khan: getcwd: %s\n", uv_strerror(errno));
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u3_king_bail();
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}
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else {
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if ( 0 != chdir(u3_Host.dir_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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u3_king_bail();
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}
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else {
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if ( 0 != unlink(URB_SOCK_PATH) && errno != ENOENT ) {
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u3l_log("khan: unlink: %s\n", uv_strerror(errno));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_pipe_init(u3L, &cop_u->pyp_u, 0)) ) {
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u3l_log("khan: uv_pipe_init: %s\n", uv_strerror(err_i));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_pipe_bind(&cop_u->pyp_u, URB_SOCK_PATH)) ) {
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u3l_log("khan: uv_pipe_bind: %s\n", uv_strerror(err_i));
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goto _khan_err_chdir;
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}
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if ( 0 != (err_i = uv_listen((uv_stream_t*)&cop_u->pyp_u, 0,
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_khan_conn_cb)) ) {
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u3l_log("khan: uv_listen: %s\n", uv_strerror(err_i));
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goto _khan_err_unlink;
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}
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if ( 0 != chdir(pax_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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goto _khan_err_close;
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}
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}
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}
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return;
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_khan_err_close:
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uv_close((uv_handle_t*)&cop_u->pyp_u, _khan_close_cb);
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_khan_err_unlink:
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if ( 0 != unlink(URB_SOCK_PATH) ) {
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u3l_log("khan: unlink: %s\n", uv_strerror(errno));
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}
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_khan_err_chdir:
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if ( 0 != chdir(pax_c) ) {
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u3l_log("khan: chdir: %s\n", uv_strerror(errno));
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}
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u3_king_bail();
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}
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u3l_log("khan: live on %s/%s\n", u3_Host.dir_c, URB_SOCK_PATH);
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}
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}
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/* _khan_born_bail(): nonessential failure; log it and keep going.
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*/
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static void
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@ -215,10 +231,10 @@ _khan_born_bail(u3_ovum* egg_u, u3_noun lud)
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static void
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_khan_io_talk(u3_auto* car_u)
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{
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u3_khan* cop_u = (u3_khan*)car_u;
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u3_khan* kan_u = (u3_khan*)car_u;
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u3_noun wir = u3nt(c3__khan,
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u3dc("scot", c3__uv, cop_u->sev_l),
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u3dc("scot", c3__uv, kan_u->sev_l),
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u3_nul);
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u3_noun cad = u3nc(c3__born, u3_nul);
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@ -234,7 +250,7 @@ _khan_io_talk(u3_auto* car_u)
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static c3_o
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_khan_io_kick(u3_auto* car_u, u3_noun wir, u3_noun cad)
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{
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u3_khan* cop_u = (u3_khan*)car_u;
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u3_khan* kan_u = (u3_khan*)car_u;
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u3_noun tag, dat, i_wir;
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c3_o ret_o;
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@ -254,23 +270,60 @@ _khan_io_kick(u3_auto* car_u, u3_noun wir, u3_noun cad)
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return ret_o;
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}
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/* _khan_io_exit(): unlink socket.
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/* _khan_shutdown_cb(): close handle.
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*/
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static void
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_khan_shutdown_cb(uv_shutdown_t* req_u, c3_i sas_i)
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{
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if ( sas_i < 0 ) {
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u3l_log("khan: shutdown: %s\n", uv_strerror(sas_i));
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}
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uv_close((uv_handle_t*)req_u->handle, _khan_close_cb);
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c3_free(req_u);
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}
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/* _khan_io_exit(): unlink socket, shut down connections.
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*/
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static void
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_khan_io_exit(u3_auto* car_u)
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{
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u3_khan* cop_u = (u3_khan*)car_u;
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c3_c* pax_c = u3_Host.dir_c;
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c3_w len_w = strlen(pax_c) + 1 + sizeof(URB_SOCK_PATH);
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c3_c* paf_c = c3_malloc(len_w);
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c3_i wit_i;
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u3_khan* kan_u = (u3_khan*)car_u;
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wit_i = snprintf(paf_c, len_w, "%s/%s", pax_c, URB_SOCK_PATH);
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c3_assert(wit_i > 0);
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c3_assert(len_w == (c3_w)wit_i + 1);
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{
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c3_c* pax_c = u3_Host.dir_c;
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c3_w len_w = strlen(pax_c) + 1 + sizeof(URB_SOCK_PATH);
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c3_c* paf_c = c3_malloc(len_w);
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c3_i wit_i;
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unlink(paf_c);
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c3_free(paf_c);
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wit_i = snprintf(paf_c, len_w, "%s/%s", pax_c, URB_SOCK_PATH);
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c3_assert(wit_i > 0);
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c3_assert(len_w == (c3_w)wit_i + 1);
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if ( 0 != unlink(paf_c) ) {
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u3l_log("khan: failed to unlink socket: %s\n", uv_strerror(errno));
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}
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c3_free(paf_c);
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}
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{
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u3_shan* san_u = kan_u->san_u;
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u3_chan* can_u = san_u->can_u;
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uv_shutdown_t* req_u;
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c3_i err_i;
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while ( can_u ) {
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req_u = c3_malloc(sizeof(*req_u));
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if ( 0 != (err_i = uv_shutdown(req_u, (uv_stream_t*)&can_u->pyp_u,
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_khan_shutdown_cb)) ) {
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u3l_log("khan: shutdown chan %p: %s\n", can_u, uv_strerror(err_i));
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// XX what to do?
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}
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can_u = can_u->nex_u;
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}
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uv_close((uv_handle_t*)&san_u->pyp_u, _khan_close_cb);
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}
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c3_free(kan_u);
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}
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/* u3_khan(): initialize control plane socket.
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@ -278,9 +331,9 @@ _khan_io_exit(u3_auto* car_u)
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u3_auto*
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u3_khan_io_init(u3_pier* pir_u)
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{
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u3_khan* cop_u = c3_calloc(sizeof(*cop_u));
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u3_khan* kan_u = c3_calloc(sizeof(*kan_u));
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u3_auto* car_u = &cop_u->car_u;
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u3_auto* car_u = &kan_u->car_u;
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car_u->nam_m = c3__khan;
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car_u->liv_o = c3n;
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car_u->io.talk_f = _khan_io_talk;
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@ -293,7 +346,7 @@ u3_khan_io_init(u3_pier* pir_u)
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gettimeofday(&tim_u, 0);
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now = u3_time_in_tv(&tim_u);
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cop_u->sev_l = u3r_mug(now);
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kan_u->sev_l = u3r_mug(now);
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u3z(now);
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}
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