1 /*- 2 * BSD LICENSE 3 * 4 * Copyright (c) Intel Corporation. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "spdk/stdinc.h" 35 36 #include "env_internal.h" 37 38 #include "spdk/version.h" 39 40 #include <rte_config.h> 41 #include <rte_eal.h> 42 43 #define SPDK_ENV_DPDK_DEFAULT_NAME "spdk" 44 #define SPDK_ENV_DPDK_DEFAULT_SHM_ID -1 45 #define SPDK_ENV_DPDK_DEFAULT_MEM_SIZE -1 46 #define SPDK_ENV_DPDK_DEFAULT_MASTER_CORE -1 47 #define SPDK_ENV_DPDK_DEFAULT_MEM_CHANNEL -1 48 #define SPDK_ENV_DPDK_DEFAULT_CORE_MASK "0x1" 49 50 static char **eal_cmdline; 51 static int eal_cmdline_argcount; 52 53 static char * 54 _sprintf_alloc(const char *format, ...) 55 { 56 va_list args; 57 va_list args_copy; 58 char *buf; 59 size_t bufsize; 60 int rc; 61 62 va_start(args, format); 63 64 /* Try with a small buffer first. */ 65 bufsize = 32; 66 67 /* Limit maximum buffer size to something reasonable so we don't loop forever. */ 68 while (bufsize <= 1024 * 1024) { 69 buf = malloc(bufsize); 70 if (buf == NULL) { 71 va_end(args); 72 return NULL; 73 } 74 75 va_copy(args_copy, args); 76 rc = vsnprintf(buf, bufsize, format, args_copy); 77 va_end(args_copy); 78 79 /* 80 * If vsnprintf() returned a count within our current buffer size, we are done. 81 * The count does not include the \0 terminator, so rc == bufsize is not OK. 82 */ 83 if (rc >= 0 && (size_t)rc < bufsize) { 84 va_end(args); 85 return buf; 86 } 87 88 /* 89 * vsnprintf() should return the required space, but some libc versions do not 90 * implement this correctly, so just double the buffer size and try again. 91 * 92 * We don't need the data in buf, so rather than realloc(), use free() and malloc() 93 * again to avoid a copy. 94 */ 95 free(buf); 96 bufsize *= 2; 97 } 98 99 va_end(args); 100 return NULL; 101 } 102 103 static void 104 spdk_env_unlink_shared_files(void) 105 { 106 /* Starting with DPDK 18.05, there are more files with unpredictable paths 107 * and filenames. The --no-shconf option prevents from creating them, but 108 * only for DPDK 18.08+. For DPDK 18.05 we just leave them be. 109 */ 110 #if RTE_VERSION < RTE_VERSION_NUM(18, 05, 0, 0) 111 char buffer[PATH_MAX]; 112 113 snprintf(buffer, PATH_MAX, "/var/run/.spdk_pid%d_hugepage_info", getpid()); 114 if (unlink(buffer)) { 115 fprintf(stderr, "Unable to unlink shared memory file: %s. Error code: %d\n", buffer, errno); 116 } 117 #endif 118 } 119 120 void 121 spdk_env_opts_init(struct spdk_env_opts *opts) 122 { 123 if (!opts) { 124 return; 125 } 126 127 memset(opts, 0, sizeof(*opts)); 128 129 opts->name = SPDK_ENV_DPDK_DEFAULT_NAME; 130 opts->core_mask = SPDK_ENV_DPDK_DEFAULT_CORE_MASK; 131 opts->shm_id = SPDK_ENV_DPDK_DEFAULT_SHM_ID; 132 opts->mem_size = SPDK_ENV_DPDK_DEFAULT_MEM_SIZE; 133 opts->master_core = SPDK_ENV_DPDK_DEFAULT_MASTER_CORE; 134 opts->mem_channel = SPDK_ENV_DPDK_DEFAULT_MEM_CHANNEL; 135 } 136 137 static void 138 spdk_free_args(char **args, int argcount) 139 { 140 int i; 141 142 for (i = 0; i < argcount; i++) { 143 free(args[i]); 144 } 145 146 if (argcount) { 147 free(args); 148 } 149 } 150 151 static char ** 152 spdk_push_arg(char *args[], int *argcount, char *arg) 153 { 154 char **tmp; 155 156 if (arg == NULL) { 157 fprintf(stderr, "%s: NULL arg supplied\n", __func__); 158 spdk_free_args(args, *argcount); 159 return NULL; 160 } 161 162 tmp = realloc(args, sizeof(char *) * (*argcount + 1)); 163 if (tmp == NULL) { 164 spdk_free_args(args, *argcount); 165 return NULL; 166 } 167 168 tmp[*argcount] = arg; 169 (*argcount)++; 170 171 return tmp; 172 } 173 174 static void 175 spdk_destruct_eal_cmdline(void) 176 { 177 spdk_free_args(eal_cmdline, eal_cmdline_argcount); 178 } 179 180 181 static int 182 spdk_build_eal_cmdline(const struct spdk_env_opts *opts) 183 { 184 int argcount = 0; 185 char **args; 186 187 args = NULL; 188 189 /* set the program name */ 190 args = spdk_push_arg(args, &argcount, _sprintf_alloc("%s", opts->name)); 191 if (args == NULL) { 192 return -1; 193 } 194 195 /* disable shared configuration files when in single process mode. This allows for cleaner shutdown */ 196 if (opts->shm_id < 0) { 197 args = spdk_push_arg(args, &argcount, _sprintf_alloc("%s", "--no-shconf")); 198 if (args == NULL) { 199 return -1; 200 } 201 } 202 203 /* set the coremask */ 204 /* NOTE: If coremask starts with '[' and ends with ']' it is a core list 205 */ 206 if (opts->core_mask[0] == '[') { 207 char *l_arg = _sprintf_alloc("-l %s", opts->core_mask + 1); 208 int len = strlen(l_arg); 209 if (l_arg[len - 1] == ']') { 210 l_arg[len - 1] = '\0'; 211 } 212 args = spdk_push_arg(args, &argcount, l_arg); 213 } else { 214 args = spdk_push_arg(args, &argcount, _sprintf_alloc("-c %s", opts->core_mask)); 215 } 216 217 if (args == NULL) { 218 return -1; 219 } 220 221 /* set the memory channel number */ 222 if (opts->mem_channel > 0) { 223 args = spdk_push_arg(args, &argcount, _sprintf_alloc("-n %d", opts->mem_channel)); 224 if (args == NULL) { 225 return -1; 226 } 227 } 228 229 /* set the memory size */ 230 if (opts->mem_size >= 0) { 231 args = spdk_push_arg(args, &argcount, _sprintf_alloc("-m %d", opts->mem_size)); 232 if (args == NULL) { 233 return -1; 234 } 235 } 236 237 /* set the master core */ 238 if (opts->master_core > 0) { 239 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--master-lcore=%d", 240 opts->master_core)); 241 if (args == NULL) { 242 return -1; 243 } 244 } 245 246 /* set no pci if enabled */ 247 if (opts->no_pci) { 248 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--no-pci")); 249 if (args == NULL) { 250 return -1; 251 } 252 } 253 254 /* create just one hugetlbfs file */ 255 if (opts->hugepage_single_segments) { 256 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--single-file-segments")); 257 if (args == NULL) { 258 return -1; 259 } 260 } 261 262 /* unlink hugepages after initialization */ 263 if (opts->unlink_hugepage) { 264 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--huge-unlink")); 265 if (args == NULL) { 266 return -1; 267 } 268 } 269 270 /* use a specific hugetlbfs mount */ 271 if (opts->hugedir) { 272 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--huge-dir=%s", opts->hugedir)); 273 if (args == NULL) { 274 return -1; 275 } 276 } 277 278 #if RTE_VERSION >= RTE_VERSION_NUM(18, 05, 0, 0) && RTE_VERSION < RTE_VERSION_NUM(18, 5, 1, 0) 279 /* Dynamic memory management is buggy in DPDK 18.05.0. Don't use it. */ 280 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--legacy-mem")); 281 if (args == NULL) { 282 return -1; 283 } 284 #endif 285 286 if (opts->num_pci_addr) { 287 size_t i; 288 char bdf[32]; 289 struct spdk_pci_addr *pci_addr = 290 opts->pci_blacklist ? opts->pci_blacklist : opts->pci_whitelist; 291 292 for (i = 0; i < opts->num_pci_addr; i++) { 293 spdk_pci_addr_fmt(bdf, 32, &pci_addr[i]); 294 args = spdk_push_arg(args, &argcount, _sprintf_alloc("%s=%s", 295 (opts->pci_blacklist ? "--pci-blacklist" : "--pci-whitelist"), 296 bdf)); 297 if (args == NULL) { 298 return -1; 299 } 300 } 301 } 302 303 #ifdef __linux__ 304 /* Set the base virtual address - it must be an address that is not in the 305 * ASAN shadow region, otherwise ASAN-enabled builds will ignore the 306 * mmap hint. 307 * 308 * Ref: https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm 309 */ 310 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--base-virtaddr=0x200000000000")); 311 if (args == NULL) { 312 return -1; 313 } 314 315 if (opts->shm_id < 0) { 316 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--file-prefix=spdk_pid%d", 317 getpid())); 318 if (args == NULL) { 319 return -1; 320 } 321 } else { 322 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--file-prefix=spdk%d", 323 opts->shm_id)); 324 if (args == NULL) { 325 return -1; 326 } 327 328 /* set the process type */ 329 args = spdk_push_arg(args, &argcount, _sprintf_alloc("--proc-type=auto")); 330 if (args == NULL) { 331 return -1; 332 } 333 } 334 #endif 335 336 eal_cmdline = args; 337 eal_cmdline_argcount = argcount; 338 if (atexit(spdk_destruct_eal_cmdline) != 0) { 339 fprintf(stderr, "Failed to register cleanup handler\n"); 340 } 341 342 return argcount; 343 } 344 345 int spdk_env_init(const struct spdk_env_opts *opts) 346 { 347 char **dpdk_args = NULL; 348 int i, rc; 349 int orig_optind; 350 351 rc = spdk_build_eal_cmdline(opts); 352 if (rc < 0) { 353 fprintf(stderr, "Invalid arguments to initialize DPDK\n"); 354 return -1; 355 } 356 357 printf("Starting %s / %s initialization...\n", SPDK_VERSION_STRING, rte_version()); 358 printf("[ DPDK EAL parameters: "); 359 for (i = 0; i < eal_cmdline_argcount; i++) { 360 printf("%s ", eal_cmdline[i]); 361 } 362 printf("]\n"); 363 364 /* DPDK rearranges the array we pass to it, so make a copy 365 * before passing so we can still free the individual strings 366 * correctly. 367 */ 368 dpdk_args = calloc(eal_cmdline_argcount, sizeof(char *)); 369 if (dpdk_args == NULL) { 370 fprintf(stderr, "Failed to allocate dpdk_args\n"); 371 return -1; 372 } 373 memcpy(dpdk_args, eal_cmdline, sizeof(char *) * eal_cmdline_argcount); 374 375 fflush(stdout); 376 orig_optind = optind; 377 optind = 1; 378 rc = rte_eal_init(eal_cmdline_argcount, dpdk_args); 379 optind = orig_optind; 380 381 free(dpdk_args); 382 383 if (rc < 0) { 384 fprintf(stderr, "Failed to initialize DPDK\n"); 385 return -1; 386 } 387 388 if (opts->shm_id < 0 && !opts->hugepage_single_segments) { 389 /* 390 * Unlink hugepage and config info files after init. This will ensure they get 391 * deleted on app exit, even if the app crashes and does not exit normally. 392 * Only do this when not in multi-process mode, since for multi-process other 393 * apps will need to open these files. These files are not created for 394 * "single file segments". 395 */ 396 spdk_env_unlink_shared_files(); 397 } 398 399 spdk_pci_init(); 400 401 if (spdk_mem_map_init() < 0) { 402 fprintf(stderr, "Failed to allocate mem_map\n"); 403 return -1; 404 } 405 if (spdk_vtophys_init() < 0) { 406 fprintf(stderr, "Failed to initialize vtophys\n"); 407 return -1; 408 } 409 410 return 0; 411 } 412