1 /* $NetBSD: fstest_puffs.c,v 1.14 2023/08/03 20:45:50 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/mount.h> 30 #include <sys/socket.h> 31 #include <sys/statvfs.h> 32 #include <sys/wait.h> 33 34 #include <assert.h> 35 #include <atf-c.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <pthread.h> 40 #include <puffs.h> 41 #include <puffsdump.h> 42 #include <signal.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <string.h> 46 #include <stdlib.h> 47 48 #include <rump/rump.h> 49 #include <rump/rump_syscallshotgun.h> 50 #include <rump/rump_syscalls.h> 51 52 #include "h_fsmacros.h" 53 54 #define BUFSIZE (128*1024) 55 #define DTFS_DUMP "-o","dump" 56 57 static bool mayquit = false; 58 59 static ssize_t 60 xread(int fd, void *vp, size_t n) 61 { 62 size_t left; 63 64 left = n; 65 do { 66 ssize_t ssz; 67 68 ssz = read(fd, vp, left); 69 if (ssz == -1) { 70 return ssz; 71 } 72 left -= ssz; 73 vp = (char *)vp + ssz; 74 } while (left > 0); 75 return n; 76 } 77 78 static ssize_t 79 xwrite(int fd, const void *vp, size_t n) 80 { 81 size_t left; 82 83 left = n; 84 do { 85 ssize_t ssz; 86 87 ssz = write(fd, vp, left); 88 if (ssz == -1) { 89 return ssz; 90 } 91 left -= ssz; 92 vp = (const char *)vp + ssz; 93 } while (left > 0); 94 return n; 95 } 96 97 /* 98 * Threads which shovel data between comfd and /dev/puffs. 99 * (cannot use polling since fd's are in different namespaces) 100 */ 101 static void * 102 readshovel(void *arg) 103 { 104 struct putter_hdr *phdr; 105 struct puffs_req *preq; 106 struct puffstestargs *args = arg; 107 char buf[BUFSIZE]; 108 ssize_t n; 109 int comfd, puffsfd; 110 111 comfd = args->pta_servfd; 112 puffsfd = args->pta_rumpfd; 113 114 phdr = (void *)buf; 115 preq = (void *)buf; 116 117 rump_pub_lwproc_newlwp(1); 118 119 for (;;) { 120 n = rump_sys_read(puffsfd, buf, sizeof(*phdr)); 121 if (n <= 0) { 122 fprintf(stderr, "readshovel r1 %zd / %d\n", n, errno); 123 break; 124 } 125 126 assert(phdr->pth_framelen < BUFSIZE); 127 n = rump_sys_read(puffsfd, buf+sizeof(*phdr), 128 phdr->pth_framelen - sizeof(*phdr)); 129 if (n <= 0) { 130 fprintf(stderr, "readshovel r2 %zd / %d\n", n, errno); 131 break; 132 } 133 134 /* Analyze request */ 135 if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS) { 136 assert(preq->preq_optype < PUFFS_VFS_MAX); 137 args->pta_vfs_toserv_ops[preq->preq_optype]++; 138 } else if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VN) { 139 assert(preq->preq_optype < PUFFS_VN_MAX); 140 args->pta_vn_toserv_ops[preq->preq_optype]++; 141 } 142 143 n = phdr->pth_framelen; 144 if (xwrite(comfd, buf, n) != n) { 145 fprintf(stderr, "readshovel write %zd / %d\n", n, errno); 146 break; 147 } 148 } 149 150 if (n != 0 && mayquit == false) 151 abort(); 152 return NULL; 153 } 154 155 static void * 156 writeshovel(void *arg) 157 { 158 struct puffstestargs *args = arg; 159 struct putter_hdr *phdr; 160 struct puffs_req *preq; 161 char buf[BUFSIZE]; 162 size_t toread; 163 ssize_t n; 164 int comfd, puffsfd; 165 166 rump_pub_lwproc_newlwp(1); 167 168 comfd = args->pta_servfd; 169 puffsfd = args->pta_rumpfd; 170 171 phdr = (struct putter_hdr *)buf; 172 preq = (void *)buf; 173 174 for (;;) { 175 uint64_t off; 176 177 /* 178 * Need to write everything to the "kernel" in one chunk, 179 * so make sure we have it here. 180 */ 181 off = 0; 182 toread = sizeof(struct putter_hdr); 183 assert(toread < BUFSIZE); 184 do { 185 n = xread(comfd, buf+off, toread); 186 if (n <= 0) { 187 fprintf(stderr, "writeshovel read %zd / %d\n", 188 n, errno); 189 goto out; 190 } 191 off += n; 192 if (off >= sizeof(struct putter_hdr)) 193 toread = phdr->pth_framelen - off; 194 else 195 toread = off - sizeof(struct putter_hdr); 196 } while (toread); 197 198 if (__predict_false( 199 PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS 200 && preq->preq_optype == PUFFS_VFS_UNMOUNT)) { 201 if (preq->preq_rv == 0) 202 mayquit = true; 203 } 204 205 n = rump_sys_write(puffsfd, buf, phdr->pth_framelen); 206 if ((size_t)n != phdr->pth_framelen) { 207 fprintf(stderr, "writeshovel wr %zd / %d\n", n, errno); 208 break; 209 } 210 } 211 212 out: 213 if (n != 0) 214 abort(); 215 return NULL; 216 } 217 218 static void 219 rumpshovels(struct puffstestargs *args) 220 { 221 pthread_t pt; 222 int rv; 223 224 if ((rv = rump_init()) == -1) 225 err(1, "rump_init"); 226 227 if (pthread_create(&pt, NULL, readshovel, args) == -1) 228 err(1, "read shovel"); 229 pthread_detach(pt); 230 231 if (pthread_create(&pt, NULL, writeshovel, args) == -1) 232 err(1, "write shovel"); 233 pthread_detach(pt); 234 } 235 236 static void 237 childfail(int sign) 238 { 239 240 atf_tc_fail("child died"); /* almost signal-safe */ 241 } 242 243 struct puffstestargs *theargs; /* XXX */ 244 245 /* XXX: we don't support size */ 246 static int 247 donewfs(const atf_tc_t *tc, void **argp, 248 const char *image, off_t size, void *fspriv, char **theargv) 249 { 250 struct puffstestargs *args; 251 pid_t childpid; 252 int *pflags; 253 char comfd[16]; 254 int sv[2]; 255 int mntflags; 256 size_t len; 257 ssize_t n; 258 259 *argp = NULL; 260 261 args = malloc(sizeof(*args)); 262 if (args == NULL) 263 return errno; 264 memset(args, 0, sizeof(*args)); 265 266 pflags = &args->pta_pflags; 267 268 /* Create socketpair for communication with the real file server */ 269 if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sv) == -1) 270 return errno; 271 272 signal(SIGCHLD, childfail); 273 274 switch ((childpid = fork())) { 275 case 0: 276 close(sv[1]); 277 snprintf(comfd, sizeof(sv[0]), "%d", sv[0]); 278 if (setenv("PUFFS_COMFD", comfd, 1) == -1) 279 return errno; 280 281 execvp(theargv[0], theargv); 282 return errno; 283 case -1: 284 return errno; 285 default: 286 close(sv[0]); 287 break; 288 } 289 290 /* read args */ 291 if ((n = xread(sv[1], &len, sizeof(len))) != sizeof(len)) 292 err(1, "mp 1 %zd", n); 293 if (len > MAXPATHLEN) 294 err(1, "mntpath > MAXPATHLEN"); 295 if ((size_t)xread(sv[1], args->pta_dir, len) != len) 296 err(1, "mp 2"); 297 if (xread(sv[1], &len, sizeof(len)) != sizeof(len)) 298 err(1, "fn 1"); 299 if (len > MAXPATHLEN) 300 err(1, "devpath > MAXPATHLEN"); 301 if ((size_t)xread(sv[1], args->pta_dev, len) != len) 302 err(1, "fn 2"); 303 if (xread(sv[1], &mntflags, sizeof(mntflags)) != sizeof(mntflags)) 304 err(1, "mntflags"); 305 if (xread(sv[1], &args->pta_pargslen, sizeof(args->pta_pargslen)) 306 != sizeof(args->pta_pargslen)) 307 err(1, "puffstest_args len"); 308 args->pta_pargs = malloc(args->pta_pargslen); 309 if (args->pta_pargs == NULL) 310 err(1, "malloc"); 311 if (xread(sv[1], args->pta_pargs, args->pta_pargslen) 312 != (ssize_t)args->pta_pargslen) 313 err(1, "puffstest_args"); 314 if (xread(sv[1], pflags, sizeof(*pflags)) != sizeof(*pflags)) 315 err(1, "pflags"); 316 317 args->pta_childpid = childpid; 318 args->pta_servfd = sv[1]; 319 strlcpy(args->pta_dev, image, sizeof(args->pta_dev)); 320 321 *argp = theargs = args; 322 323 return 0; 324 } 325 326 int 327 puffs_fstest_newfs(const atf_tc_t *tc, void **argp, 328 const char *image, off_t size, void *fspriv) 329 { 330 char dtfs_path[MAXPATHLEN]; 331 char *dtfsargv[6]; 332 char **theargv; 333 334 /* build dtfs exec path from atf test dir */ 335 sprintf(dtfs_path, "%s/../puffs/h_dtfs/h_dtfs", 336 atf_tc_get_config_var(tc, "srcdir")); 337 338 if (fspriv) { 339 theargv = fspriv; 340 theargv[0] = dtfs_path; 341 } else { 342 dtfsargv[0] = dtfs_path; 343 dtfsargv[1] = __UNCONST("-i"); 344 dtfsargv[2] = __UNCONST("-s"); 345 dtfsargv[3] = __UNCONST("dtfs"); 346 dtfsargv[4] = __UNCONST("fictional"); 347 dtfsargv[5] = NULL; 348 349 theargv = dtfsargv; 350 } 351 352 return donewfs(tc, argp, image, size, fspriv, theargv); 353 } 354 355 int 356 p2k_ffs_fstest_newfs(const atf_tc_t *tc, void **argp, 357 const char *image, off_t size, void *fspriv) 358 { 359 char *rumpffs_argv[5]; 360 int rv; 361 362 rump_init(); 363 if ((rv = ffs_fstest_newfs(tc, argp, image, size, fspriv)) != 0) 364 return rv; 365 if (mkdir("p2kffsfake", 0777) == -1 && errno != EEXIST) 366 return errno; 367 368 setenv("P2K_NODETACH", "1", 1); 369 rumpffs_argv[0] = __UNCONST("rump_ffs"); 370 rumpffs_argv[1] = __UNCONST(image); 371 rumpffs_argv[2] = __UNCONST("p2kffsfake"); /* NOTUSED */ 372 rumpffs_argv[3] = NULL; 373 374 if ((rv = donewfs(tc, argp, image, size, fspriv, rumpffs_argv)) != 0) 375 ffs_fstest_delfs(tc, argp); 376 return rv; 377 } 378 379 int 380 puffs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 381 { 382 struct puffstestargs *pargs = arg; 383 int fd; 384 385 rump_init(); 386 fd = rump_sys_open("/dev/puffs", O_RDWR); 387 if (fd == -1) 388 return fd; 389 390 if (rump_sys_mkdir(path, 0777) == -1) 391 return -1; 392 393 if (rump_sys_mount(MOUNT_PUFFS, path, flags, 394 pargs->pta_pargs, pargs->pta_pargslen) == -1) { 395 /* apply "to kill a child" to avoid atf hang (kludge) */ 396 kill(pargs->pta_childpid, SIGKILL); 397 return -1; 398 } 399 400 pargs->pta_rumpfd = fd; 401 rumpshovels(pargs); 402 403 return 0; 404 } 405 __strong_alias(p2k_ffs_fstest_mount,puffs_fstest_mount); 406 407 int 408 puffs_fstest_delfs(const atf_tc_t *tc, void *arg) 409 { 410 411 /* useless ... */ 412 return 0; 413 } 414 415 int 416 p2k_ffs_fstest_delfs(const atf_tc_t *tc, void *arg) 417 { 418 419 return ffs_fstest_delfs(tc, arg); 420 } 421 422 int 423 puffs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 424 { 425 struct puffstestargs *pargs = theargs; 426 int status; 427 int rv; 428 429 /* ok, child might exit here */ 430 signal(SIGCHLD, SIG_IGN); 431 432 rv = rump_sys_unmount(path, flags); 433 if (rv) 434 return rv; 435 436 if ((rv = rump_sys_rmdir(path)) != 0) 437 return rv; 438 439 if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0) 440 return 0; 441 kill(pargs->pta_childpid, SIGTERM); 442 usleep(10); 443 if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0) 444 return 0; 445 kill(pargs->pta_childpid, SIGKILL); 446 usleep(500); 447 wait(&status); 448 449 rmdir("p2kffsfake"); 450 451 return 0; 452 } 453 __strong_alias(p2k_ffs_fstest_unmount,puffs_fstest_unmount); 454
Indexes created Tue Sep 23 14:10:03 GMT 2025