fstest_puffs.c revision 1.7
1 /* $NetBSD: fstest_puffs.c,v 1.7 2010/12/29 22:56:59 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 2010 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_syscalls.h> 50 51 #include "h_fsmacros.h" 52 53 #define BUFSIZE (128*1024) 54 #define DTFS_DUMP "-o","dump" 55 56 static bool mayquit = false; 57 58 static ssize_t 59 xread(int fd, void *vp, size_t n) 60 { 61 size_t left; 62 63 left = n; 64 do { 65 ssize_t ssz; 66 67 ssz = read(fd, vp, left); 68 if (ssz == -1) { 69 return ssz; 70 } 71 left -= ssz; 72 vp = (char *)vp + ssz; 73 } while (left > 0); 74 return n; 75 } 76 77 static ssize_t 78 xwrite(int fd, const void *vp, size_t n) 79 { 80 size_t left; 81 82 left = n; 83 do { 84 ssize_t ssz; 85 86 ssz = write(fd, vp, left); 87 if (ssz == -1) { 88 return ssz; 89 } 90 left -= ssz; 91 vp = (const char *)vp + ssz; 92 } while (left > 0); 93 return n; 94 } 95 96 /* 97 * Threads which shovel data between comfd and /dev/puffs. 98 * (cannot use polling since fd's are in different namespaces) 99 */ 100 static void * 101 readshovel(void *arg) 102 { 103 struct putter_hdr *phdr; 104 struct puffs_req *preq; 105 struct puffstestargs *args = arg; 106 char buf[BUFSIZE]; 107 ssize_t n; 108 int comfd, puffsfd; 109 110 comfd = args->pta_servfd; 111 puffsfd = args->pta_rumpfd; 112 113 phdr = (void *)buf; 114 preq = (void *)buf; 115 116 rump_pub_lwproc_newlwp(1); 117 118 for (;;) { 119 n = rump_sys_read(puffsfd, buf, sizeof(*phdr)); 120 if (n <= 0) { 121 fprintf(stderr, "readshovel r1 %zd / %d\n", n, errno); 122 break; 123 } 124 125 assert(phdr->pth_framelen < BUFSIZE); 126 n = rump_sys_read(puffsfd, buf+sizeof(*phdr), 127 phdr->pth_framelen - sizeof(*phdr)); 128 if (n <= 0) { 129 fprintf(stderr, "readshovel r2 %zd / %d\n", n, errno); 130 break; 131 } 132 133 /* Analyze request */ 134 if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS) { 135 assert(preq->preq_optype < PUFFS_VFS_MAX); 136 args->pta_vfs_toserv_ops[preq->preq_optype]++; 137 } else if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VN) { 138 assert(preq->preq_optype < PUFFS_VN_MAX); 139 args->pta_vn_toserv_ops[preq->preq_optype]++; 140 } 141 142 n = phdr->pth_framelen; 143 if (xwrite(comfd, buf, n) != n) { 144 fprintf(stderr, "readshovel write %zd / %d\n", n, errno); 145 break; 146 } 147 } 148 149 if (n != 0 && mayquit == false) 150 abort(); 151 return NULL; 152 } 153 154 static void * 155 writeshovel(void *arg) 156 { 157 struct puffstestargs *args = arg; 158 struct putter_hdr *phdr; 159 struct puffs_req *preq; 160 char buf[BUFSIZE]; 161 size_t toread; 162 ssize_t n; 163 int comfd, puffsfd; 164 165 rump_pub_lwproc_newlwp(1); 166 167 comfd = args->pta_servfd; 168 puffsfd = args->pta_rumpfd; 169 170 phdr = (struct putter_hdr *)buf; 171 preq = (void *)buf; 172 173 for (;;) { 174 uint64_t off; 175 176 /* 177 * Need to write everything to the "kernel" in one chunk, 178 * so make sure we have it here. 179 */ 180 off = 0; 181 toread = sizeof(struct putter_hdr); 182 assert(toread < BUFSIZE); 183 do { 184 n = xread(comfd, buf+off, toread); 185 if (n <= 0) { 186 fprintf(stderr, "writeshovel read %zd / %d\n", 187 n, errno); 188 goto out; 189 } 190 off += n; 191 if (off >= sizeof(struct putter_hdr)) 192 toread = phdr->pth_framelen - off; 193 else 194 toread = off - sizeof(struct putter_hdr); 195 } while (toread); 196 197 if (__predict_false( 198 PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS 199 && preq->preq_optype == PUFFS_VFS_UNMOUNT)) { 200 if (preq->preq_rv == 0) 201 mayquit = true; 202 } 203 204 n = rump_sys_write(puffsfd, buf, phdr->pth_framelen); 205 if ((size_t)n != phdr->pth_framelen) { 206 fprintf(stderr, "writeshovel wr %zd / %d\n", n, errno); 207 break; 208 } 209 } 210 211 out: 212 if (n != 0) 213 abort(); 214 return NULL; 215 } 216 217 static void 218 rumpshovels(struct puffstestargs *args) 219 { 220 pthread_t pt; 221 int rv; 222 223 if ((rv = rump_init()) == -1) 224 err(1, "rump_init"); 225 226 if (pthread_create(&pt, NULL, readshovel, args) == -1) 227 err(1, "read shovel"); 228 pthread_detach(pt); 229 230 if (pthread_create(&pt, NULL, writeshovel, args) == -1) 231 err(1, "write shovel"); 232 pthread_detach(pt); 233 } 234 235 static void 236 childfail(int sign) 237 { 238 239 atf_tc_fail("child died"); /* almost signal-safe */ 240 } 241 242 struct puffstestargs *theargs; /* XXX */ 243 244 /* XXX: we don't support size */ 245 int 246 puffs_fstest_newfs(const atf_tc_t *tc, void **argp, 247 const char *image, off_t size, void *fspriv) 248 { 249 struct puffstestargs *args; 250 char dtfs_path[MAXPATHLEN]; 251 char *dtfsargv[6]; 252 char **theargv; 253 pid_t childpid; 254 int *pflags; 255 char comfd[16]; 256 int sv[2]; 257 int mntflags; 258 size_t len; 259 ssize_t n; 260 261 *argp = NULL; 262 263 args = malloc(sizeof(*args)); 264 if (args == NULL) 265 return errno; 266 267 pflags = &args->pta_pflags; 268 269 /* build dtfs exec path from atf test dir */ 270 sprintf(dtfs_path, "%s/../puffs/h_dtfs/h_dtfs", 271 atf_tc_get_config_var(tc, "srcdir")); 272 273 if (fspriv) { 274 theargv = fspriv; 275 theargv[0] = dtfs_path; 276 } else { 277 dtfsargv[0] = dtfs_path; 278 dtfsargv[1] = __UNCONST("-i"); 279 dtfsargv[2] = __UNCONST("-s"); 280 dtfsargv[3] = __UNCONST("dtfs"); 281 dtfsargv[4] = __UNCONST("fictional"); 282 dtfsargv[5] = NULL; 283 284 theargv = dtfsargv; 285 } 286 287 /* Create sucketpair for communication with the real file server */ 288 if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sv) == -1) 289 return errno; 290 291 signal(SIGCHLD, childfail); 292 293 switch ((childpid = fork())) { 294 case 0: 295 close(sv[1]); 296 snprintf(comfd, sizeof(sv[0]), "%d", sv[0]); 297 if (setenv("PUFFS_COMFD", comfd, 1) == -1) 298 return errno; 299 300 if (execvp(theargv[0], theargv) == -1) 301 return errno; 302 case -1: 303 return errno; 304 default: 305 close(sv[0]); 306 break; 307 } 308 309 /* read args */ 310 if ((n = xread(sv[1], &len, sizeof(len))) != sizeof(len)) 311 err(1, "mp 1 %zd", n); 312 if (len > MAXPATHLEN) 313 err(1, "mntpath > MAXPATHLEN"); 314 if ((size_t)xread(sv[1], args->pta_dir, len) != len) 315 err(1, "mp 2"); 316 if (xread(sv[1], &len, sizeof(len)) != sizeof(len)) 317 err(1, "fn 1"); 318 if (len > MAXPATHLEN) 319 err(1, "devpath > MAXPATHLEN"); 320 if ((size_t)xread(sv[1], args->pta_dev, len) != len) 321 err(1, "fn 2"); 322 if (xread(sv[1], &mntflags, sizeof(mntflags)) != sizeof(mntflags)) 323 err(1, "mntflags"); 324 if (xread(sv[1], &args->pta_pargslen, sizeof(args->pta_pargslen)) 325 != sizeof(args->pta_pargslen)) 326 err(1, "puffstest_args len"); 327 args->pta_pargs = malloc(args->pta_pargslen); 328 if (args->pta_pargs == NULL) 329 err(1, "malloc"); 330 if (xread(sv[1], args->pta_pargs, args->pta_pargslen) 331 != (ssize_t)args->pta_pargslen) 332 err(1, "puffstest_args"); 333 if (xread(sv[1], pflags, sizeof(*pflags)) != sizeof(*pflags)) 334 err(1, "pflags"); 335 336 args->pta_childpid = childpid; 337 args->pta_servfd = sv[1]; 338 strlcpy(args->pta_dev, image, sizeof(args->pta_dev)); 339 340 *argp = theargs = args; 341 342 return 0; 343 } 344 345 int 346 puffs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags) 347 { 348 struct puffstestargs *pargs = arg; 349 int fd; 350 351 rump_init(); 352 fd = rump_sys_open("/dev/puffs", O_RDWR); 353 if (fd == -1) 354 return fd; 355 356 #if 0 357 pa->pa_fd = fd; 358 #else 359 assert(fd == 0); /* XXX: FIXME */ 360 #endif 361 362 if (rump_sys_mkdir(path, 0777) == -1) 363 return -1; 364 365 if (rump_sys_mount(MOUNT_PUFFS, path, flags, 366 pargs->pta_pargs, pargs->pta_pargslen) == -1) { 367 /* apply "to kill a child" to avoid atf hang (kludge) */ 368 kill(pargs->pta_childpid, SIGKILL); 369 return -1; 370 } 371 372 pargs->pta_rumpfd = fd; 373 rumpshovels(pargs); 374 375 return 0; 376 } 377 378 int 379 puffs_fstest_delfs(const atf_tc_t *tc, void *arg) 380 { 381 382 /* useless ... */ 383 return 0; 384 } 385 386 int 387 puffs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags) 388 { 389 struct puffstestargs *pargs = theargs; 390 int status; 391 int rv; 392 393 /* ok, child might exit here */ 394 signal(SIGCHLD, SIG_IGN); 395 396 rv = rump_sys_unmount(path, flags); 397 if (rv) 398 return rv; 399 400 if ((rv = rump_sys_rmdir(path)) != 0) 401 return rv; 402 403 if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0) 404 return 0; 405 kill(pargs->pta_childpid, SIGTERM); 406 usleep(10); 407 if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0) 408 return 0; 409 kill(pargs->pta_childpid, SIGKILL); 410 usleep(500); 411 wait(&status); 412 413 return 0; 414 } 415
Indexes created Thu Oct 23 22:10:10 GMT 2025