1 /* 2 * Copyright (c) 2019 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 $/ 190 */ 191 domount(work, TMPFS_RW, "dummy", "", NULL); 192 asprintf(&buf, "%s/usr", work->basedir); 193 if (mkdir(buf, 0755) != 0) { 194 fprintf(stderr, "Command failed: mkdir %s\n", buf); 195 ++work->mount_error; 196 } 197 free(buf); 198 199 domount(work, NULLFS_RO, "$/boot", "/boot", NULL); 200 domount(work, TMPFS_RW, "dummy", "/boot/modules.local", NULL); 201 domount(work, DEVFS_RW, "dummy", "/dev", NULL); 202 domount(work, PROCFS_RO, "dummy", "/proc", NULL); 203 domount(work, NULLFS_RO, "$/bin", "/bin", "/bin.%03d"); 204 domount(work, NULLFS_RO, "$/sbin", "/sbin", NULL); 205 domount(work, NULLFS_RO, "$/lib", "/lib", "/lib.%03d"); 206 domount(work, NULLFS_RO, "$/libexec", "/libexec", "/libexec.%03d"); 207 domount(work, NULLFS_RO, "$/usr/bin", "/usr/bin", "/usr.bin.%03d"); 208 domount(work, NULLFS_RO, "$/usr/include", "/usr/include", NULL); 209 domount(work, NULLFS_RO, "$/usr/lib", "/usr/lib", NULL); 210 domount(work, NULLFS_RO, "$/usr/libdata", "/usr/libdata", NULL); 211 domount(work, NULLFS_RO, "$/usr/libexec", "/usr/libexec", NULL); 212 domount(work, NULLFS_RO, "$/usr/sbin", "/usr/sbin", NULL); 213 domount(work, NULLFS_RO, "$/usr/share", "/usr/share", NULL); 214 domount(work, TMPFS_RW_MED, "dummy", "/usr/local", NULL); 215 domount(work, NULLFS_RO, "$/usr/games", "/usr/games", NULL); 216 if (UseUsrSrc) 217 domount(work, NULLFS_RO, "$/usr/src", "/usr/src", NULL); 218 domount(work, NULLFS_RO, DPortsPath, "/xports", NULL); 219 domount(work, NULLFS_RW, OptionsPath, "/options", NULL); 220 domount(work, NULLFS_RW, PackagesPath, "/packages", NULL); 221 domount(work, NULLFS_RW, DistFilesPath, "/distfiles", NULL); 222 domount(work, TMPFS_RW_BIG, "dummy", "/construction", NULL); 223 if (UseCCache) 224 domount(work, NULLFS_RW, CCachePath, "/ccache", NULL); 225 226 /* 227 * NOTE: Uses blah/. to prevent cp from creating 'Template' under 228 * work->basedir. We want to start with the content. 229 */ 230 asprintf(&buf, "cp -Rp %s/Template/. %s", BuildBase, work->basedir); 231 rc = system(buf); 232 if (rc) { 233 fprintf(stderr, "Command failed: %s\n", buf); 234 ++work->accum_error; 235 snprintf(work->status, sizeof(work->status), 236 "Template copy failed"); 237 } 238 free(buf); 239 } 240 241 /* 242 * Called by the worker support thread to remove a worker 243 * filesystem topology. 244 * 245 * NOTE: No need to conditionalize UseUsrSrc, it doesn't hurt to 246 * issue the umount() if it isn't mounted and it ensures that 247 * everything is unmounted properly on cleanup if the state 248 * changes. 249 */ 250 void 251 DoWorkerUnmounts(worker_t *work) 252 { 253 int retries; 254 255 work->mount_error = 0; 256 for (retries = 0; retries < 10; ++retries) { 257 dounmount(work, "/proc"); 258 dounmount(work, "/dev"); 259 dounmount(work, "/usr/src"); 260 dounmount(work, "/usr/games"); 261 dounmount(work, "/boot/modules.local"); 262 dounmount(work, "/boot"); 263 dounmount(work, "/usr/local"); 264 dounmount(work, "/construction"); 265 dounmount(work, "/ccache"); /* in case of config change */ 266 dounmount(work, "/distfiles"); 267 dounmount(work, "/packages"); 268 dounmount(work, "/options"); 269 dounmount(work, "/xports"); 270 dounmount(work, "/usr/share"); 271 dounmount(work, "/usr/sbin"); 272 dounmount(work, "/usr/libexec"); 273 dounmount(work, "/usr/libdata"); 274 dounmount(work, "/usr/lib"); 275 dounmount(work, "/usr/include"); 276 dounmount(work, "/usr/bin"); 277 dounmount(work, "/libexec"); 278 dounmount(work, "/lib"); 279 dounmount(work, "/sbin"); 280 dounmount(work, "/bin"); 281 dounmount(work, ""); 282 if (work->mount_error == 0) 283 break; 284 sleep(5); 285 work->mount_error = 0; 286 } 287 if (work->mount_error) { 288 ++work->accum_error; 289 snprintf(work->status, sizeof(work->status), 290 "Unable to unmount slot"); 291 } 292 } 293 294 static 295 void 296 domount(worker_t *work, int type, const char *spath, const char *dpath, 297 const char *discretefmt) 298 { 299 const char *sbase; 300 const char *rwstr; 301 const char *optstr; 302 const char *typestr; 303 const char *debug; 304 struct stat st; 305 char *buf; 306 char *tmp; 307 int rc; 308 309 /* 310 * Make target directory if necessary. This must occur in-order 311 * since directories may have to be created under prior mounts 312 * in the sequence. 313 */ 314 asprintf(&buf, "%s%s", work->basedir, dpath); 315 if (stat(buf, &st) != 0) { 316 if (mkdir(buf, 0755) != 0) { 317 fprintf(stderr, "Command failed: mkdir %s\n", buf); 318 ++work->mount_error; 319 } 320 } 321 free(buf); 322 323 /* 324 * Setup for mount arguments 325 */ 326 rwstr = (type & MOUNT_TYPE_RW) ? "rw" : "ro"; 327 optstr = ""; 328 typestr = ""; 329 330 switch(type & MOUNT_TYPE_MASK) { 331 case MOUNT_TYPE_TMPFS: 332 /* 333 * When creating a tmpfs filesystem, make sure the big ones 334 * requested are big enough for the worst-case dport (which 335 * is usually chromium). If debugging is turned on, its even 336 * worse. You'd better have enough swap! 337 */ 338 debug = getbuildenv("WITH_DEBUG"); 339 typestr = "tmpfs"; 340 if (type & MOUNT_TYPE_BIG) 341 optstr = debug ? " -o size=128g" : " -o size=64g"; 342 else if (type & MOUNT_TYPE_MED) 343 optstr = debug ? " -o size=32g" : " -o size=16g"; 344 else 345 optstr = " -o size=16g"; 346 break; 347 case MOUNT_TYPE_NULLFS: 348 #if defined(__DragonFly__) 349 typestr = "null"; 350 #else 351 typestr = "nullfs"; 352 #endif 353 break; 354 case MOUNT_TYPE_DEVFS: 355 typestr = "devfs"; 356 break; 357 case MOUNT_TYPE_PROCFS: 358 typestr = "procfs"; 359 break; 360 default: 361 dfatal("Illegal mount type: %08x", type); 362 /* NOT REACHED */ 363 break; 364 } 365 366 /* 367 * Prefix spath 368 */ 369 if (discretefmt) { 370 sbase = BuildBase; 371 asprintf(&tmp, discretefmt, work->index); 372 spath = tmp; 373 } else { 374 if (spath[0] == '$') { 375 ++spath; 376 sbase = SystemPath; 377 if (strcmp(sbase, "/") == 0) 378 ++sbase; 379 } else { 380 sbase = ""; 381 } 382 tmp = NULL; 383 } 384 asprintf(&buf, "%s%s -t %s -o %s %s%s %s%s", 385 MOUNT_BINARY, optstr, typestr, rwstr, 386 sbase, spath, work->basedir, dpath); 387 rc = system(buf); 388 if (rc) { 389 fprintf(stderr, "Command failed: %s\n", buf); 390 ++work->mount_error; 391 } 392 free(buf); 393 if (tmp) 394 free(tmp); 395 } 396 397 static 398 void 399 dounmount(worker_t *work, const char *rpath) 400 { 401 char *buf; 402 403 asprintf(&buf, "%s%s", work->basedir, rpath); 404 if (unmount(buf, 0) < 0) { 405 switch(errno) { 406 case EPERM: /* This is probably fatal later on in mount */ 407 case ENOENT: /* Expected if mount already gone */ 408 case EINVAL: /* Expected if mount already gone (maybe) */ 409 break; 410 default: 411 fprintf(stderr, "Cannot umount %s (%s)\n", 412 buf, strerror(errno)); 413 ++work->mount_error; 414 break; 415 } 416 } 417 free(buf); 418 } 419 420 static 421 void 422 makeDiscreteCopies(const char *spath, const char *discretefmt) 423 { 424 char *src; 425 char *dst; 426 char *buf; 427 struct stat st; 428 int i; 429 int rc; 430 431 for (i = 0; i < MaxWorkers; ++i) { 432 if (spath[0] == '$') { 433 if (strcmp(SystemPath, "/") == 0) 434 asprintf(&src, "%s%s", 435 SystemPath + 1, spath + 1); 436 else 437 asprintf(&src, "%s%s", 438 SystemPath, spath + 1); 439 } else { 440 src = strdup(spath); 441 } 442 asprintf(&buf, discretefmt, i); 443 asprintf(&dst, "%s%s", BuildBase, buf); 444 free(buf); 445 446 if (stat(dst, &st) < 0) { 447 if (mkdir(dst, 0555) < 0) { 448 dlog(DLOG_ALL, "Template - mkdir %s failed\n", 449 dst); 450 dfatal_errno("Cannot mkdir %s:", dst); 451 } 452 } 453 asprintf(&buf, "chflags -R noschg %s; " 454 "rm -rf %s; " 455 "cp -Rp %s/. %s", 456 dst, dst, src, dst); 457 rc = system(buf); 458 dlog(DLOG_ALL | DLOG_FILTER, 459 "Template - rc=%d running %s\n", rc, buf); 460 if (rc) 461 dfatal("Command failed: %s", buf); 462 free(buf); 463 free(src); 464 free(dst); 465 } 466 } 467