1 /* 2 * Copyright (c) 2019-2022 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * This code uses concepts and configuration based on 'synth', by 8 * John R. Marino <draco@marino.st>, which was written in ada. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 3. Neither the name of The DragonFly Project nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific, prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 27 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 28 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 30 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 32 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 34 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 #include "dsynth.h" 38 39 static void domount(worker_t *work, int type, 40 const char *spath, const char *dpath, 41 const char *discretefmt); 42 static void dounmount(worker_t *work, const char *rpath); 43 static void makeDiscreteCopies(const char *spath, const char *discretefmt); 44 45 /* 46 * Called by the frontend to create a template which will be cpdup'd 47 * into fresh workers. 48 * 49 * Template must have been previously destroyed. Errors are fatal 50 */ 51 int 52 DoCreateTemplate(int force) 53 { 54 struct stat st; 55 char *goodbuf; 56 char *buf; 57 const char *reason = ""; 58 int rc; 59 int fd; 60 int n; 61 62 rc = 0; 63 asprintf(&goodbuf, "%s/.template.good", BuildBase); 64 65 /* 66 * Conditionally create the template and discrete copies of certain 67 * directories if we think we are missing things. 68 */ 69 if (force == 1) 70 reason = " (Asked to force template creation)"; 71 if (force == 0) { 72 time_t ls_mtime; 73 74 asprintf(&buf, "%s/Template", BuildBase); 75 if (stat(buf, &st) < 0) { 76 force = 1; 77 reason = " (Template file missing)"; 78 } 79 free(buf); 80 81 /* 82 * Check to see if the worker count changed and some 83 * template dirs are missing or out of date, and also if 84 * a new world was installed (via /bin/ls mtime). 85 */ 86 asprintf(&buf, "%s/bin/ls", SystemPath); 87 if (stat(buf, &st) < 0) 88 dfatal_errno("Unable to locate %s", buf); 89 free(buf); 90 ls_mtime = st.st_mtime; 91 92 for (n = 0; n < MaxWorkers; ++n) { 93 asprintf(&buf, "%s/bin.%03d/ls", BuildBase, n); 94 if (stat(buf, &st) < 0 || st.st_mtime != ls_mtime) { 95 force = 1; 96 reason = " (/bin/ls mtime mismatch)"; 97 } 98 free(buf); 99 } 100 101 if (stat(goodbuf, &st) < 0) { 102 force = 1; 103 reason = " (.template.good file missing)"; 104 } 105 } 106 107 dlog(DLOG_ALL, "Check Template: %s%s\n", 108 (force ? "Must-Create" : "Good"), 109 reason); 110 111 /* 112 * Create the template 113 */ 114 if (force) { 115 remove(goodbuf); /* ignore exit code */ 116 117 rc = 0; 118 asprintf(&buf, "%s/mktemplate %s %s/Template", 119 SCRIPTPATH(SCRIPTDIR), SystemPath, BuildBase); 120 rc = system(buf); 121 if (rc) 122 dfatal("Command failed: %s\n", buf); 123 dlog(DLOG_ALL | DLOG_FILTER, 124 "Template - rc=%d running %s\n", rc, buf); 125 free(buf); 126 127 /* 128 * Make discrete copies of certain extremely heavily used 129 * but small directories. 130 */ 131 makeDiscreteCopies("$/bin", "/bin.%03d"); 132 makeDiscreteCopies("$/lib", "/lib.%03d"); 133 makeDiscreteCopies("$/libexec", "/libexec.%03d"); 134 makeDiscreteCopies("$/usr/bin", "/usr.bin.%03d"); 135 136 /* 137 * Mark the template good... ah, do a sync() to really 138 * be sure that it can't get corrupted. 139 */ 140 sync(); 141 fd = open(goodbuf, O_RDWR|O_CREAT|O_TRUNC, 0644); 142 dassert_errno(fd >= 0, "could not create %s", goodbuf); 143 close(fd); 144 145 dlog(DLOG_ALL | DLOG_FILTER, "Template - done\n"); 146 } 147 free(goodbuf); 148 149 return force; 150 } 151 152 void 153 DoDestroyTemplate(void) 154 { 155 struct stat st; 156 char *path; 157 char *buf; 158 int rc; 159 160 /* 161 * NOTE: rm -rf safety, use a fixed name 'Template' to ensure we 162 * do not accidently blow something up. 163 */ 164 asprintf(&path, "%s/Template", BuildBase); 165 if (stat(path, &st) == 0) { 166 asprintf(&buf, "chflags -R noschg %s; /bin/rm -rf %s", 167 path, path); 168 rc = system(buf); 169 if (rc) 170 dfatal("Command failed: %s (ignored)\n", buf); 171 free(buf); 172 } 173 free(path); 174 } 175 176 /* 177 * Called by the worker support thread to install a new worker 178 * filesystem topology. 179 */ 180 void 181 DoWorkerMounts(worker_t *work) 182 { 183 char *buf; 184 int rc; 185 186 /* 187 * Generate required mounts, domount() will mkdir() the target 188 * directory if necessary and prefix spath with SystemPath if 189 * it starts with $/ 190 */ 191 setNumaDomain(work->index); 192 domount(work, TMPFS_RW, "dummy", "", NULL); 193 asprintf(&buf, "%s/usr", work->basedir); 194 if (mkdir(buf, 0755) != 0) { 195 fprintf(stderr, "Command failed: mkdir %s\n", buf); 196 ++work->mount_error; 197 } 198 free(buf); 199 200 domount(work, TMPFS_RW, "dummy", "/boot", NULL); 201 202 asprintf(&buf, "%s/boot/modules.local", work->basedir); 203 if (mkdir(buf, 0755) != 0) { 204 fprintf(stderr, "Command failed: mkdir %s\n", buf); 205 ++work->mount_error; 206 } 207 free(buf); 208 209 domount(work, DEVFS_RW, "dummy", "/dev", NULL); 210 domount(work, PROCFS_RO, "dummy", "/proc", NULL); 211 domount(work, NULLFS_RO, "$/bin", "/bin", "/bin.%03d"); 212 domount(work, NULLFS_RO, "$/sbin", "/sbin", NULL); 213 domount(work, NULLFS_RO, "$/lib", "/lib", "/lib.%03d"); 214 domount(work, NULLFS_RO, "$/libexec", "/libexec", "/libexec.%03d"); 215 domount(work, NULLFS_RO, "$/usr/bin", "/usr/bin", "/usr.bin.%03d"); 216 domount(work, NULLFS_RO, "$/usr/include", "/usr/include", NULL); 217 domount(work, NULLFS_RO, "$/usr/lib", "/usr/lib", NULL); 218 domount(work, NULLFS_RO, "$/usr/libdata", "/usr/libdata", NULL); 219 domount(work, NULLFS_RO, "$/usr/libexec", "/usr/libexec", NULL); 220 domount(work, NULLFS_RO, "$/usr/sbin", "/usr/sbin", NULL); 221 domount(work, NULLFS_RO, "$/usr/share", "/usr/share", NULL); 222 domount(work, TMPFS_RW_MED, "dummy", "/usr/local", NULL); 223 domount(work, NULLFS_RO, "$/usr/games", "/usr/games", NULL); 224 if (UseUsrSrc) 225 domount(work, NULLFS_RO, "$/usr/src", "/usr/src", NULL); 226 domount(work, NULLFS_RO, DPortsPath, "/xports", NULL); 227 domount(work, NULLFS_RW, OptionsPath, "/options", NULL); 228 domount(work, NULLFS_RW, PackagesPath, "/packages", NULL); 229 domount(work, NULLFS_RW, DistFilesPath, "/distfiles", NULL); 230 domount(work, TMPFS_RW_BIG, "dummy", "/construction", NULL); 231 if (UseCCache) 232 domount(work, NULLFS_RW, CCachePath, "/ccache", NULL); 233 234 /* 235 * NOTE: Uses blah/. to prevent cp from creating 'Template' under 236 * work->basedir. We want to start with the content. 237 */ 238 asprintf(&buf, "cp -Rp %s/Template/. %s", BuildBase, work->basedir); 239 rc = system(buf); 240 if (rc) { 241 fprintf(stderr, "Command failed: %s\n", buf); 242 ++work->accum_error; 243 snprintf(work->status, sizeof(work->status), 244 "Template copy failed"); 245 } 246 free(buf); 247 setNumaDomain(-1); 248 } 249 250 /* 251 * Called by the worker support thread to remove a worker 252 * filesystem topology. 253 * 254 * NOTE: No need to conditionalize UseUsrSrc, it doesn't hurt to 255 * issue the umount() if it isn't mounted and it ensures that 256 * everything is unmounted properly on cleanup if the state 257 * changes. 258 */ 259 void 260 DoWorkerUnmounts(worker_t *work) 261 { 262 int retries; 263 264 setNumaDomain(work->index); 265 work->mount_error = 0; 266 for (retries = 0; retries < 10; ++retries) { 267 dounmount(work, "/proc"); 268 dounmount(work, "/dev"); 269 dounmount(work, "/usr/src"); 270 dounmount(work, "/usr/games"); 271 dounmount(work, "/boot"); 272 dounmount(work, "/usr/local"); 273 dounmount(work, "/construction"); 274 dounmount(work, "/ccache"); /* in case of config change */ 275 dounmount(work, "/distfiles"); 276 dounmount(work, "/packages"); 277 dounmount(work, "/options"); 278 dounmount(work, "/xports"); 279 dounmount(work, "/usr/share"); 280 dounmount(work, "/usr/sbin"); 281 dounmount(work, "/usr/libexec"); 282 dounmount(work, "/usr/libdata"); 283 dounmount(work, "/usr/lib"); 284 dounmount(work, "/usr/include"); 285 dounmount(work, "/usr/bin"); 286 dounmount(work, "/libexec"); 287 dounmount(work, "/lib"); 288 dounmount(work, "/sbin"); 289 dounmount(work, "/bin"); 290 dounmount(work, ""); 291 if (work->mount_error == 0) 292 break; 293 sleep(5); 294 work->mount_error = 0; 295 } 296 if (work->mount_error) { 297 ++work->accum_error; 298 snprintf(work->status, sizeof(work->status), 299 "Unable to unmount slot"); 300 } 301 setNumaDomain(-1); 302 } 303 304 static 305 void 306 domount(worker_t *work, int type, const char *spath, const char *dpath, 307 const char *discretefmt) 308 { 309 const char *sbase; 310 const char *rwstr; 311 const char *optstr; 312 const char *typestr; 313 const char *debug; 314 struct stat st; 315 char *buf; 316 char *tmp; 317 int rc; 318 319 /* 320 * Make target directory if necessary. This must occur in-order 321 * since directories may have to be created under prior mounts 322 * in the sequence. 323 */ 324 asprintf(&buf, "%s%s", work->basedir, dpath); 325 if (stat(buf, &st) != 0) { 326 if (mkdir(buf, 0755) != 0) { 327 fprintf(stderr, "Command failed: mkdir %s\n", buf); 328 ++work->mount_error; 329 } 330 } 331 free(buf); 332 333 /* 334 * Setup for mount arguments 335 */ 336 rwstr = (type & MOUNT_TYPE_RW) ? "rw" : "ro"; 337 optstr = ""; 338 typestr = ""; 339 340 switch(type & MOUNT_TYPE_MASK) { 341 case MOUNT_TYPE_TMPFS: 342 /* 343 * When creating a tmpfs filesystem, make sure the big ones 344 * requested are big enough for the worst-case dport (which 345 * is usually chromium). If debugging is turned on, its even 346 * worse. You'd better have enough swap! 347 */ 348 debug = getbuildenv("WITH_DEBUG"); 349 typestr = "tmpfs"; 350 if (type & MOUNT_TYPE_BIG) 351 optstr = debug ? " -o size=128g" : " -o size=64g"; 352 else if (type & MOUNT_TYPE_MED) 353 optstr = debug ? " -o size=32g" : " -o size=16g"; 354 else 355 optstr = " -o size=16g"; 356 break; 357 case MOUNT_TYPE_NULLFS: 358 #if defined(__DragonFly__) 359 typestr = "null"; 360 #else 361 typestr = "nullfs"; 362 #endif 363 break; 364 case MOUNT_TYPE_DEVFS: 365 typestr = "devfs"; 366 break; 367 case MOUNT_TYPE_PROCFS: 368 typestr = "procfs"; 369 break; 370 default: 371 dfatal("Illegal mount type: %08x", type); 372 /* NOT REACHED */ 373 break; 374 } 375 376 /* 377 * Prefix spath 378 */ 379 if (discretefmt) { 380 sbase = BuildBase; 381 asprintf(&tmp, discretefmt, work->index); 382 spath = tmp; 383 } else { 384 if (spath[0] == '$') { 385 ++spath; 386 sbase = SystemPath; 387 if (strcmp(sbase, "/") == 0) 388 ++sbase; 389 } else { 390 sbase = ""; 391 } 392 tmp = NULL; 393 } 394 asprintf(&buf, "%s%s -t %s -o %s %s%s %s%s", 395 MOUNT_BINARY, optstr, typestr, rwstr, 396 sbase, spath, work->basedir, dpath); 397 rc = system(buf); 398 if (rc) { 399 fprintf(stderr, "Command failed: %s\n", buf); 400 ++work->mount_error; 401 } 402 free(buf); 403 if (tmp) 404 free(tmp); 405 } 406 407 static 408 void 409 dounmount(worker_t *work, const char *rpath) 410 { 411 char *buf; 412 413 asprintf(&buf, "%s%s", work->basedir, rpath); 414 if (unmount(buf, 0) < 0) { 415 switch(errno) { 416 case EPERM: /* This is probably fatal later on in mount */ 417 case ENOENT: /* Expected if mount already gone */ 418 case EINVAL: /* Expected if mount already gone (maybe) */ 419 break; 420 default: 421 fprintf(stderr, "Cannot umount %s (%s)\n", 422 buf, strerror(errno)); 423 ++work->mount_error; 424 break; 425 } 426 } 427 free(buf); 428 } 429 430 static 431 void 432 makeDiscreteCopies(const char *spath, const char *discretefmt) 433 { 434 char *src; 435 char *dst; 436 char *buf; 437 struct stat st; 438 int i; 439 int rc; 440 441 for (i = 0; i < MaxWorkers; ++i) { 442 setNumaDomain(i); 443 if (spath[0] == '$') { 444 if (strcmp(SystemPath, "/") == 0) 445 asprintf(&src, "%s%s", 446 SystemPath + 1, spath + 1); 447 else 448 asprintf(&src, "%s%s", 449 SystemPath, spath + 1); 450 } else { 451 src = strdup(spath); 452 } 453 asprintf(&buf, discretefmt, i); 454 asprintf(&dst, "%s%s", BuildBase, buf); 455 free(buf); 456 457 if (stat(dst, &st) < 0) { 458 if (mkdir(dst, 0555) < 0) { 459 dlog(DLOG_ALL, "Template - mkdir %s failed\n", 460 dst); 461 dfatal_errno("Cannot mkdir %s:", dst); 462 } 463 } 464 asprintf(&buf, "chflags -R noschg %s; " 465 "rm -rf %s; " 466 "cp -Rp %s/. %s", 467 dst, dst, src, dst); 468 rc = system(buf); 469 dlog(DLOG_ALL | DLOG_FILTER, 470 "Template - rc=%d running %s\n", rc, buf); 471 if (rc) 472 dfatal("Command failed: %s", buf); 473 free(buf); 474 free(src); 475 free(dst); 476 setNumaDomain(-1); 477 } 478 } 479