source3/torture/test_messaging_read.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Test for a messaging_read bug
   4    Copyright (C) Volker Lendecke 2014
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "torture/proto.h"
  22 #include "lib/util/tevent_unix.h"
  23 #include "messages.h"
  24
  25 struct msg_count_state {
  26         struct tevent_context *ev;
  27         struct messaging_context *msg_ctx;
  28         uint32_t msg_type;
  29         unsigned *count;
  30 };
  31
  32 static void msg_count_done(struct tevent_req *subreq);
  33
  34 static struct tevent_req *msg_count_send(TALLOC_CTX *mem_ctx,
  35                                          struct tevent_context *ev,
  36                                          struct messaging_context *msg_ctx,
  37                                          uint32_t msg_type,
  38                                          unsigned *count)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct msg_count_state *state;
  42
  43         req = tevent_req_create(mem_ctx, &state, struct msg_count_state);
  44         if (req == NULL) {
  45                 return NULL;
  46         }
  47         state->ev = ev;
  48         state->msg_ctx = msg_ctx;
  49         state->msg_type = msg_type;
  50         state->count = count;
  51
  52         subreq = messaging_read_send(state, state->ev, state->msg_ctx,
  53                                      state->msg_type);
  54         if (tevent_req_nomem(subreq, req)) {
  55                 return tevent_req_post(req, ev);
  56         }
  57         tevent_req_set_callback(subreq, msg_count_done, req);
  58         return req;
  59 }
  60
  61 static void msg_count_done(struct tevent_req *subreq)
  62 {
  63         struct tevent_req *req = tevent_req_callback_data(
  64                 subreq, struct tevent_req);
  65         struct msg_count_state *state = tevent_req_data(
  66                 req, struct msg_count_state);
  67         int ret;
  68
  69         ret = messaging_read_recv(subreq, NULL, NULL);
  70         TALLOC_FREE(subreq);
  71         if (tevent_req_error(req, ret)) {
  72                 return;
  73         }
  74         *state->count += 1;
  75
  76         subreq = messaging_read_send(state, state->ev, state->msg_ctx,
  77                                      state->msg_type);
  78         if (tevent_req_nomem(subreq, req)) {
  79                 return;
  80         }
  81         tevent_req_set_callback(subreq, msg_count_done, req);
  82 }
  83
  84 bool run_messaging_read1(int dummy)
  85 {
  86         struct tevent_context *ev = NULL;
  87         struct messaging_context *msg_ctx = NULL;
  88         struct tevent_req *req1 = NULL;
  89         unsigned count1 = 0;
  90         struct tevent_req *req2 = NULL;
  91         unsigned count2 = 0;
  92         NTSTATUS status;
  93         bool retval = false;
  94         int i;
  95
  96         ev = samba_tevent_context_init(talloc_tos());
  97         if (ev == NULL) {
  98                 fprintf(stderr, "tevent_context_init failed\n");
  99                 goto fail;
 100         }
 101         msg_ctx = messaging_init(ev, ev);
 102         if (msg_ctx == NULL) {
 103                 fprintf(stderr, "messaging_init failed\n");
 104                 goto fail;
 105         }
 106
 107         req1 = msg_count_send(ev, ev, msg_ctx, MSG_SMB_NOTIFY, &count1);
 108         if (req1 == NULL) {
 109                 fprintf(stderr, "msg_count_send failed\n");
 110                 goto fail;
 111         }
 112         req2 = msg_count_send(ev, ev, msg_ctx, MSG_SMB_NOTIFY, &count2);
 113         if (req1 == NULL) {
 114                 fprintf(stderr, "msg_count_send failed\n");
 115                 goto fail;
 116         }
 117         status = messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx),
 118                                     MSG_SMB_NOTIFY, NULL, 0);
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 fprintf(stderr, "messaging_send_buf failed: %s\n",
 121                         nt_errstr(status));
 122                 goto fail;
 123         }
 124
 125         for (i=0; i<2; i++) {
 126                 if (tevent_loop_once(ev) != 0) {
 127                         fprintf(stderr, "tevent_loop_once failed\n");
 128                         goto fail;
 129                 }
 130         }
 131
 132         printf("%u/%u\n", count1, count2);
 133
 134         if ((count1 != 1) || (count2 != 1)){
 135                 fprintf(stderr, "Got %u/%u msgs, expected 1 each\n",
 136                         count1, count2);
 137                 goto fail;
 138         }
 139
 140         retval = true;
 141 fail:
 142         TALLOC_FREE(req1);
 143         TALLOC_FREE(req2);
 144         TALLOC_FREE(msg_ctx);
 145         TALLOC_FREE(ev);
 146         return retval;
 147 }
 148
 149 struct msg_free_state {
 150         struct tevent_req **to_free;
 151 };
 152
 153 static void msg_free_done(struct tevent_req *subreq);
 154
 155 static struct tevent_req *msg_free_send(TALLOC_CTX *mem_ctx,
 156                                         struct tevent_context *ev,
 157                                         struct messaging_context *msg_ctx,
 158                                         uint32_t msg_type,
 159                                         struct tevent_req **to_free)
 160 {
 161         struct tevent_req *req, *subreq;
 162         struct msg_free_state *state;
 163
 164         req = tevent_req_create(mem_ctx, &state, struct msg_free_state);
 165         if (req == NULL) {
 166                 return NULL;
 167         }
 168         state->to_free = to_free;
 169
 170         subreq = messaging_read_send(state, ev, msg_ctx, msg_type);
 171         if (tevent_req_nomem(subreq, req)) {
 172                 return tevent_req_post(req, ev);
 173         }
 174         tevent_req_set_callback(subreq, msg_free_done, req);
 175         return req;
 176 }
 177
 178 static void msg_free_done(struct tevent_req *subreq)
 179 {
 180         struct tevent_req *req = tevent_req_callback_data(
 181                 subreq, struct tevent_req);
 182         struct msg_free_state *state = tevent_req_data(
 183                 req, struct msg_free_state);
 184         int ret;
 185
 186         ret = messaging_read_recv(subreq, NULL, NULL);
 187         TALLOC_FREE(subreq);
 188         if (tevent_req_error(req, ret)) {
 189                 return;
 190         }
 191         TALLOC_FREE(*state->to_free);
 192         tevent_req_done(req);
 193 }
 194
 195 bool run_messaging_read2(int dummy)
 196 {
 197         struct tevent_context *ev = NULL;
 198         struct messaging_context *msg_ctx = NULL;
 199         struct tevent_req *req1 = NULL;
 200         struct tevent_req *req2 = NULL;
 201         unsigned count = 0;
 202         NTSTATUS status;
 203         bool retval = false;
 204
 205         ev = samba_tevent_context_init(talloc_tos());
 206         if (ev == NULL) {
 207                 fprintf(stderr, "tevent_context_init failed\n");
 208                 goto fail;
 209         }
 210         msg_ctx = messaging_init(ev, ev);
 211         if (msg_ctx == NULL) {
 212                 fprintf(stderr, "messaging_init failed\n");
 213                 goto fail;
 214         }
 215
 216         req1 = msg_free_send(ev, ev, msg_ctx, MSG_SMB_NOTIFY, &req2);
 217         if (req1 == NULL) {
 218                 fprintf(stderr, "msg_count_send failed\n");
 219                 goto fail;
 220         }
 221         req2 = msg_count_send(ev, ev, msg_ctx, MSG_SMB_NOTIFY, &count);
 222         if (req1 == NULL) {
 223                 fprintf(stderr, "msg_count_send failed\n");
 224                 goto fail;
 225         }
 226         status = messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx),
 227                                     MSG_SMB_NOTIFY, NULL, 0);
 228         if (!NT_STATUS_IS_OK(status)) {
 229                 fprintf(stderr, "messaging_send_buf failed: %s\n",
 230                         nt_errstr(status));
 231                 goto fail;
 232         }
 233
 234         if (!tevent_req_poll(req1, ev) != 0) {
 235                 fprintf(stderr, "tevent_req_poll failed\n");
 236                 goto fail;
 237         }
 238
 239         if (count != 0) {
 240                 fprintf(stderr, "Got %u msgs, expected none\n", count);
 241                 goto fail;
 242         }
 243
 244         retval = true;
 245 fail:
 246         TALLOC_FREE(req1);
 247         TALLOC_FREE(msg_ctx);
 248         TALLOC_FREE(ev);
 249         return retval;
 250 }
 251
 252 struct msg_pingpong_state {
 253         uint8_t dummy;
 254 };
 255
 256 static void msg_pingpong_done(struct tevent_req *subreq);
 257
 258 static struct tevent_req *msg_pingpong_send(TALLOC_CTX *mem_ctx,
 259                                             struct tevent_context *ev,
 260                                             struct messaging_context *msg_ctx,
 261                                             struct server_id dst)
 262 {
 263         struct tevent_req *req, *subreq;
 264         struct msg_pingpong_state *state;
 265         NTSTATUS status;
 266
 267         req = tevent_req_create(mem_ctx, &state, struct msg_pingpong_state);
 268         if (req == NULL) {
 269                 return NULL;
 270         }
 271
 272         status = messaging_send_buf(msg_ctx, dst, MSG_PING, NULL, 0);
 273         if (!NT_STATUS_IS_OK(status)) {
 274                 tevent_req_error(req, map_errno_from_nt_status(status));
 275                 return tevent_req_post(req, ev);
 276         }
 277
 278         subreq = messaging_read_send(state, ev, msg_ctx, MSG_PONG);
 279         if (tevent_req_nomem(subreq, req)) {
 280                 return tevent_req_post(req, ev);
 281         }
 282         tevent_req_set_callback(subreq, msg_pingpong_done, req);
 283         return req;
 284 }
 285
 286 static void msg_pingpong_done(struct tevent_req *subreq)
 287 {
 288         struct tevent_req *req = tevent_req_callback_data(
 289                 subreq, struct tevent_req);
 290         int ret;
 291
 292         ret = messaging_read_recv(subreq, NULL, NULL);
 293         TALLOC_FREE(subreq);
 294         if (ret != 0) {
 295                 tevent_req_error(req, ret);
 296                 return;
 297         }
 298         tevent_req_done(req);
 299 }
 300
 301 static int msg_pingpong_recv(struct tevent_req *req)
 302 {
 303         int err;
 304
 305         if (tevent_req_is_unix_error(req, &err)) {
 306                 return err;
 307         }
 308         return 0;
 309 }
 310
 311 static int msg_pingpong(struct messaging_context *msg_ctx,
 312                         struct server_id dst)
 313 {
 314         struct tevent_context *ev;
 315         struct tevent_req *req;
 316         int ret = ENOMEM;
 317
 318         ev = tevent_context_init(msg_ctx);
 319         if (ev == NULL) {
 320                 goto fail;
 321         }
 322         req = msg_pingpong_send(ev, ev, msg_ctx, dst);
 323         if (req == NULL) {
 324                 goto fail;
 325         }
 326         if (!tevent_req_poll(req, ev)) {
 327                 ret = errno;
 328                 goto fail;
 329         }
 330         ret = msg_pingpong_recv(req);
 331 fail:
 332         TALLOC_FREE(ev);
 333         return ret;
 334 }
 335
 336 static void ping_responder_exit(struct tevent_context *ev,
 337                                 struct tevent_fd *fde,
 338                                 uint16_t flags,
 339                                 void *private_data)
 340 {
 341         bool *done = private_data;
 342         *done = true;
 343 }
 344
 345 static void ping_responder(int ready_pipe, int exit_pipe)
 346 {
 347         struct tevent_context *ev;
 348         struct messaging_context *msg_ctx;
 349         struct tevent_fd *exit_handler;
 350         char c = 0;
 351         bool done = false;
 352
 353         ev = samba_tevent_context_init(talloc_tos());
 354         if (ev == NULL) {
 355                 fprintf(stderr, "child tevent_context_init failed\n");
 356                 exit(1);
 357         }
 358         msg_ctx = messaging_init(ev, ev);
 359         if (msg_ctx == NULL) {
 360                 fprintf(stderr, "child messaging_init failed\n");
 361                 exit(1);
 362         }
 363         exit_handler = tevent_add_fd(ev, ev, exit_pipe, TEVENT_FD_READ,
 364                                      ping_responder_exit, &done);
 365         if (exit_handler == NULL) {
 366                 fprintf(stderr, "child tevent_add_fd failed\n");
 367                 exit(1);
 368         }
 369
 370         if (write(ready_pipe, &c, 1) != 1) {
 371                 fprintf(stderr, "child messaging_init failed\n");
 372                 exit(1);
 373         }
 374
 375         while (!done) {
 376                 int ret;
 377                 ret = tevent_loop_once(ev);
 378                 if (ret != 0) {
 379                         fprintf(stderr, "child tevent_loop_once failed\n");
 380                         exit(1);
 381                 }
 382         }
 383
 384         TALLOC_FREE(msg_ctx);
 385         TALLOC_FREE(ev);
 386 }
 387
 388 bool run_messaging_read3(int dummy)
 389 {
 390         struct tevent_context *ev = NULL;
 391         struct messaging_context *msg_ctx = NULL;
 392         bool retval = false;
 393         pid_t child;
 394         int ready_pipe[2];
 395         int exit_pipe[2];
 396         int ret;
 397         char c;
 398         struct server_id dst;
 399
 400         if ((pipe(ready_pipe) != 0) || (pipe(exit_pipe) != 0)) {
 401                 perror("pipe failed");
 402                 return false;
 403         }
 404
 405         child = fork();
 406         if (child == -1) {
 407                 perror("fork failed");
 408                 return false;
 409         }
 410
 411         if (child == 0) {
 412                 close(ready_pipe[0]);
 413                 close(exit_pipe[1]);
 414                 ping_responder(ready_pipe[1], exit_pipe[0]);
 415                 exit(0);
 416         }
 417         close(ready_pipe[1]);
 418         close(exit_pipe[0]);
 419
 420         if (read(ready_pipe[0], &c, 1) != 1) {
 421                 perror("read failed");
 422                 return false;
 423         }
 424
 425         ev = samba_tevent_context_init(talloc_tos());
 426         if (ev == NULL) {
 427                 fprintf(stderr, "tevent_context_init failed\n");
 428                 goto fail;
 429         }
 430         msg_ctx = messaging_init(ev, ev);
 431         if (msg_ctx == NULL) {
 432                 fprintf(stderr, "messaging_init failed\n");
 433                 goto fail;
 434         }
 435
 436         dst = messaging_server_id(msg_ctx);
 437         dst.pid = child;
 438
 439         ret = msg_pingpong(msg_ctx, dst);
 440         if (ret != 0){
 441                 fprintf(stderr, "msg_pingpong failed\n");
 442                 goto fail;
 443         }
 444
 445         retval = true;
 446 fail:
 447         TALLOC_FREE(msg_ctx);
 448         TALLOC_FREE(ev);
 449         return retval;
 450 }