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