bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU low level functions |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003 Fabrice Bellard |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 5 | * |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
Peter Maydell | aafd758 | 2016-01-29 17:49:55 +0000 | [diff] [blame] | 24 | #include "qemu/osdep.h" |
Paolo Bonzini | f582af5 | 2010-02-02 20:33:11 +0100 | [diff] [blame] | 25 | |
| 26 | /* Needed early for CONFIG_BSD etc. */ |
Paolo Bonzini | f582af5 | 2010-02-02 20:33:11 +0100 | [diff] [blame] | 27 | |
Juan Quintela | dfe5fff | 2009-07-27 16:12:40 +0200 | [diff] [blame] | 28 | #ifdef CONFIG_SOLARIS |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame] | 29 | #include <sys/statvfs.h> |
Andreas Färber | e78815a | 2010-09-25 11:26:05 +0000 | [diff] [blame] | 30 | /* See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for |
| 31 | discussion about Solaris header problems */ |
Marc-André Lureau | d7df0b4 | 2019-01-17 15:43:53 +0400 | [diff] [blame] | 32 | extern int madvise(char *, size_t, int); |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame] | 33 | #endif |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 34 | |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 35 | #include "qemu-common.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 36 | #include "qemu/cutils.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 37 | #include "qemu/sockets.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 38 | #include "qemu/error-report.h" |
Paolo Bonzini | 83c9089 | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 39 | #include "monitor/monitor.h" |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 40 | |
Paul Moore | 0f66998 | 2012-08-03 14:39:21 -0400 | [diff] [blame] | 41 | static bool fips_enabled = false; |
| 42 | |
Eduardo Habkost | d494352 | 2016-04-09 16:42:44 -0300 | [diff] [blame] | 43 | static const char *hw_version = QEMU_HW_VERSION; |
Crístian Viana | 93bfef4 | 2012-05-30 00:35:51 -0300 | [diff] [blame] | 44 | |
Paolo Bonzini | 128aa58 | 2011-09-21 12:36:48 +0200 | [diff] [blame] | 45 | int socket_set_cork(int fd, int v) |
| 46 | { |
| 47 | #if defined(SOL_TCP) && defined(TCP_CORK) |
Lei Li | 4bd1afb | 2013-03-06 22:29:16 +0800 | [diff] [blame] | 48 | return qemu_setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v)); |
Paolo Bonzini | 128aa58 | 2011-09-21 12:36:48 +0200 | [diff] [blame] | 49 | #else |
| 50 | return 0; |
| 51 | #endif |
| 52 | } |
| 53 | |
MORITA Kazutaka | bf1c852 | 2013-02-22 12:39:50 +0900 | [diff] [blame] | 54 | int socket_set_nodelay(int fd) |
| 55 | { |
| 56 | int v = 1; |
Lei Li | 4bd1afb | 2013-03-06 22:29:16 +0800 | [diff] [blame] | 57 | return qemu_setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v)); |
MORITA Kazutaka | bf1c852 | 2013-02-22 12:39:50 +0900 | [diff] [blame] | 58 | } |
| 59 | |
Andreas Färber | e78815a | 2010-09-25 11:26:05 +0000 | [diff] [blame] | 60 | int qemu_madvise(void *addr, size_t len, int advice) |
| 61 | { |
| 62 | if (advice == QEMU_MADV_INVALID) { |
| 63 | errno = EINVAL; |
| 64 | return -1; |
| 65 | } |
| 66 | #if defined(CONFIG_MADVISE) |
| 67 | return madvise(addr, len, advice); |
| 68 | #elif defined(CONFIG_POSIX_MADVISE) |
| 69 | return posix_madvise(addr, len, advice); |
| 70 | #else |
| 71 | errno = EINVAL; |
| 72 | return -1; |
| 73 | #endif |
| 74 | } |
| 75 | |
Emilio G. Cota | 5fa64b3 | 2017-07-15 02:28:47 -0400 | [diff] [blame] | 76 | static int qemu_mprotect__osdep(void *addr, size_t size, int prot) |
| 77 | { |
| 78 | g_assert(!((uintptr_t)addr & ~qemu_real_host_page_mask)); |
| 79 | g_assert(!(size & ~qemu_real_host_page_mask)); |
| 80 | |
| 81 | #ifdef _WIN32 |
| 82 | DWORD old_protect; |
| 83 | |
| 84 | if (!VirtualProtect(addr, size, prot, &old_protect)) { |
Philippe Mathieu-Daudé | cf0c76c | 2020-02-28 11:07:24 +0100 | [diff] [blame] | 85 | g_autofree gchar *emsg = g_win32_error_message(GetLastError()); |
| 86 | error_report("%s: VirtualProtect failed: %s", __func__, emsg); |
Emilio G. Cota | 5fa64b3 | 2017-07-15 02:28:47 -0400 | [diff] [blame] | 87 | return -1; |
| 88 | } |
| 89 | return 0; |
| 90 | #else |
| 91 | if (mprotect(addr, size, prot)) { |
| 92 | error_report("%s: mprotect failed: %s", __func__, strerror(errno)); |
| 93 | return -1; |
| 94 | } |
| 95 | return 0; |
| 96 | #endif |
| 97 | } |
| 98 | |
| 99 | int qemu_mprotect_rwx(void *addr, size_t size) |
| 100 | { |
| 101 | #ifdef _WIN32 |
| 102 | return qemu_mprotect__osdep(addr, size, PAGE_EXECUTE_READWRITE); |
| 103 | #else |
| 104 | return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC); |
| 105 | #endif |
| 106 | } |
| 107 | |
| 108 | int qemu_mprotect_none(void *addr, size_t size) |
| 109 | { |
| 110 | #ifdef _WIN32 |
| 111 | return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS); |
| 112 | #else |
| 113 | return qemu_mprotect__osdep(addr, size, PROT_NONE); |
| 114 | #endif |
| 115 | } |
| 116 | |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 117 | #ifndef _WIN32 |
Fam Zheng | ca74995 | 2017-08-11 19:44:46 +0800 | [diff] [blame] | 118 | |
| 119 | static int fcntl_op_setlk = -1; |
| 120 | static int fcntl_op_getlk = -1; |
| 121 | |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 122 | /* |
| 123 | * Dups an fd and sets the flags |
| 124 | */ |
| 125 | static int qemu_dup_flags(int fd, int flags) |
| 126 | { |
| 127 | int ret; |
| 128 | int serrno; |
| 129 | int dup_flags; |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 130 | |
Fam Zheng | 761d1dd | 2016-06-22 20:53:19 +0800 | [diff] [blame] | 131 | ret = qemu_dup(fd); |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 132 | if (ret == -1) { |
| 133 | goto fail; |
| 134 | } |
| 135 | |
| 136 | dup_flags = fcntl(ret, F_GETFL); |
| 137 | if (dup_flags == -1) { |
| 138 | goto fail; |
| 139 | } |
| 140 | |
| 141 | if ((flags & O_SYNC) != (dup_flags & O_SYNC)) { |
| 142 | errno = EINVAL; |
| 143 | goto fail; |
| 144 | } |
| 145 | |
| 146 | /* Set/unset flags that we can with fcntl */ |
Corey Bryant | 3b6eda2 | 2012-10-18 16:41:04 -0400 | [diff] [blame] | 147 | if (fcntl(ret, F_SETFL, flags) == -1) { |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 148 | goto fail; |
| 149 | } |
| 150 | |
| 151 | /* Truncate the file in the cases that open() would truncate it */ |
| 152 | if (flags & O_TRUNC || |
| 153 | ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))) { |
| 154 | if (ftruncate(ret, 0) == -1) { |
| 155 | goto fail; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | return ret; |
| 160 | |
| 161 | fail: |
| 162 | serrno = errno; |
| 163 | if (ret != -1) { |
| 164 | close(ret); |
| 165 | } |
| 166 | errno = serrno; |
| 167 | return -1; |
| 168 | } |
Paolo Bonzini | 0100fbb | 2012-10-29 15:19:18 +0100 | [diff] [blame] | 169 | |
Fam Zheng | 761d1dd | 2016-06-22 20:53:19 +0800 | [diff] [blame] | 170 | int qemu_dup(int fd) |
| 171 | { |
| 172 | int ret; |
| 173 | #ifdef F_DUPFD_CLOEXEC |
| 174 | ret = fcntl(fd, F_DUPFD_CLOEXEC, 0); |
| 175 | #else |
| 176 | ret = dup(fd); |
| 177 | if (ret != -1) { |
| 178 | qemu_set_cloexec(ret); |
| 179 | } |
| 180 | #endif |
| 181 | return ret; |
| 182 | } |
| 183 | |
Paolo Bonzini | 0100fbb | 2012-10-29 15:19:18 +0100 | [diff] [blame] | 184 | static int qemu_parse_fdset(const char *param) |
| 185 | { |
| 186 | return qemu_parse_fd(param); |
| 187 | } |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 188 | |
Fam Zheng | ca74995 | 2017-08-11 19:44:46 +0800 | [diff] [blame] | 189 | static void qemu_probe_lock_ops(void) |
| 190 | { |
| 191 | if (fcntl_op_setlk == -1) { |
| 192 | #ifdef F_OFD_SETLK |
| 193 | int fd; |
| 194 | int ret; |
| 195 | struct flock fl = { |
| 196 | .l_whence = SEEK_SET, |
| 197 | .l_start = 0, |
| 198 | .l_len = 0, |
| 199 | .l_type = F_WRLCK, |
| 200 | }; |
| 201 | |
| 202 | fd = open("/dev/null", O_RDWR); |
| 203 | if (fd < 0) { |
| 204 | fprintf(stderr, |
| 205 | "Failed to open /dev/null for OFD lock probing: %s\n", |
| 206 | strerror(errno)); |
| 207 | fcntl_op_setlk = F_SETLK; |
| 208 | fcntl_op_getlk = F_GETLK; |
| 209 | return; |
| 210 | } |
| 211 | ret = fcntl(fd, F_OFD_GETLK, &fl); |
| 212 | close(fd); |
| 213 | if (!ret) { |
| 214 | fcntl_op_setlk = F_OFD_SETLK; |
| 215 | fcntl_op_getlk = F_OFD_GETLK; |
| 216 | } else { |
| 217 | fcntl_op_setlk = F_SETLK; |
| 218 | fcntl_op_getlk = F_GETLK; |
| 219 | } |
| 220 | #else |
| 221 | fcntl_op_setlk = F_SETLK; |
| 222 | fcntl_op_getlk = F_GETLK; |
| 223 | #endif |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | bool qemu_has_ofd_lock(void) |
| 228 | { |
| 229 | qemu_probe_lock_ops(); |
| 230 | #ifdef F_OFD_SETLK |
| 231 | return fcntl_op_setlk == F_OFD_SETLK; |
| 232 | #else |
| 233 | return false; |
| 234 | #endif |
| 235 | } |
| 236 | |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 237 | static int qemu_lock_fcntl(int fd, int64_t start, int64_t len, int fl_type) |
| 238 | { |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 239 | int ret; |
| 240 | struct flock fl = { |
| 241 | .l_whence = SEEK_SET, |
| 242 | .l_start = start, |
| 243 | .l_len = len, |
| 244 | .l_type = fl_type, |
| 245 | }; |
Fam Zheng | ca74995 | 2017-08-11 19:44:46 +0800 | [diff] [blame] | 246 | qemu_probe_lock_ops(); |
Fam Zheng | f86428a | 2017-12-26 14:53:00 +0800 | [diff] [blame] | 247 | do { |
| 248 | ret = fcntl(fd, fcntl_op_setlk, &fl); |
| 249 | } while (ret == -1 && errno == EINTR); |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 250 | return ret == -1 ? -errno : 0; |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive) |
| 254 | { |
| 255 | return qemu_lock_fcntl(fd, start, len, exclusive ? F_WRLCK : F_RDLCK); |
| 256 | } |
| 257 | |
| 258 | int qemu_unlock_fd(int fd, int64_t start, int64_t len) |
| 259 | { |
| 260 | return qemu_lock_fcntl(fd, start, len, F_UNLCK); |
| 261 | } |
| 262 | |
| 263 | int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive) |
| 264 | { |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 265 | int ret; |
| 266 | struct flock fl = { |
| 267 | .l_whence = SEEK_SET, |
| 268 | .l_start = start, |
| 269 | .l_len = len, |
| 270 | .l_type = exclusive ? F_WRLCK : F_RDLCK, |
| 271 | }; |
Fam Zheng | ca74995 | 2017-08-11 19:44:46 +0800 | [diff] [blame] | 272 | qemu_probe_lock_ops(); |
| 273 | ret = fcntl(fd, fcntl_op_getlk, &fl); |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 274 | if (ret == -1) { |
| 275 | return -errno; |
| 276 | } else { |
| 277 | return fl.l_type == F_UNLCK ? 0 : -EAGAIN; |
| 278 | } |
Fam Zheng | 13461fd | 2017-05-03 00:35:54 +0800 | [diff] [blame] | 279 | } |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 280 | #endif |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 281 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 282 | /* |
| 283 | * Opens a file with FD_CLOEXEC set |
| 284 | */ |
| 285 | int qemu_open(const char *name, int flags, ...) |
| 286 | { |
| 287 | int ret; |
| 288 | int mode = 0; |
| 289 | |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 290 | #ifndef _WIN32 |
| 291 | const char *fdset_id_str; |
| 292 | |
| 293 | /* Attempt dup of fd from fd set */ |
| 294 | if (strstart(name, "/dev/fdset/", &fdset_id_str)) { |
| 295 | int64_t fdset_id; |
| 296 | int fd, dupfd; |
| 297 | |
| 298 | fdset_id = qemu_parse_fdset(fdset_id_str); |
| 299 | if (fdset_id == -1) { |
| 300 | errno = EINVAL; |
| 301 | return -1; |
| 302 | } |
| 303 | |
| 304 | fd = monitor_fdset_get_fd(fdset_id, flags); |
Peter Xu | 4745146 | 2018-06-08 11:55:11 +0800 | [diff] [blame] | 305 | if (fd < 0) { |
| 306 | errno = -fd; |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 307 | return -1; |
| 308 | } |
| 309 | |
| 310 | dupfd = qemu_dup_flags(fd, flags); |
| 311 | if (dupfd == -1) { |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | ret = monitor_fdset_dup_fd_add(fdset_id, dupfd); |
| 316 | if (ret == -1) { |
| 317 | close(dupfd); |
| 318 | errno = EINVAL; |
| 319 | return -1; |
| 320 | } |
| 321 | |
| 322 | return dupfd; |
| 323 | } |
| 324 | #endif |
| 325 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 326 | if (flags & O_CREAT) { |
| 327 | va_list ap; |
| 328 | |
| 329 | va_start(ap, flags); |
| 330 | mode = va_arg(ap, int); |
| 331 | va_end(ap); |
| 332 | } |
| 333 | |
| 334 | #ifdef O_CLOEXEC |
| 335 | ret = open(name, flags | O_CLOEXEC, mode); |
| 336 | #else |
| 337 | ret = open(name, flags, mode); |
| 338 | if (ret >= 0) { |
| 339 | qemu_set_cloexec(ret); |
| 340 | } |
| 341 | #endif |
| 342 | |
Stefan Hajnoczi | a581307 | 2013-08-22 11:29:03 +0200 | [diff] [blame] | 343 | #ifdef O_DIRECT |
| 344 | if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) { |
| 345 | error_report("file system may not support O_DIRECT"); |
| 346 | errno = EINVAL; /* in case it was clobbered */ |
| 347 | } |
| 348 | #endif /* O_DIRECT */ |
| 349 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 350 | return ret; |
| 351 | } |
| 352 | |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 353 | int qemu_close(int fd) |
| 354 | { |
Corey Bryant | adb696f | 2012-08-14 16:43:47 -0400 | [diff] [blame] | 355 | int64_t fdset_id; |
| 356 | |
| 357 | /* Close fd that was dup'd from an fdset */ |
| 358 | fdset_id = monitor_fdset_dup_fd_find(fd); |
| 359 | if (fdset_id != -1) { |
| 360 | int ret; |
| 361 | |
| 362 | ret = close(fd); |
| 363 | if (ret == 0) { |
| 364 | monitor_fdset_dup_fd_remove(fd); |
| 365 | } |
| 366 | |
| 367 | return ret; |
| 368 | } |
| 369 | |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 370 | return close(fd); |
| 371 | } |
| 372 | |
Kirill A. Shutemov | 7b5f699 | 2010-01-20 00:56:08 +0100 | [diff] [blame] | 373 | /* |
Marc-André Lureau | ee13240 | 2019-11-08 18:09:56 +0400 | [diff] [blame] | 374 | * Delete a file from the filesystem, unless the filename is /dev/fdset/... |
| 375 | * |
| 376 | * Returns: On success, zero is returned. On error, -1 is returned, |
| 377 | * and errno is set appropriately. |
| 378 | */ |
| 379 | int qemu_unlink(const char *name) |
| 380 | { |
| 381 | if (g_str_has_prefix(name, "/dev/fdset/")) { |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | return unlink(name); |
| 386 | } |
| 387 | |
| 388 | /* |
Kirill A. Shutemov | 7b5f699 | 2010-01-20 00:56:08 +0100 | [diff] [blame] | 389 | * A variant of write(2) which handles partial write. |
| 390 | * |
| 391 | * Return the number of bytes transferred. |
| 392 | * Set errno if fewer than `count' bytes are written. |
Juan Quintela | 1298cb6 | 2010-03-04 10:00:39 +0100 | [diff] [blame] | 393 | * |
| 394 | * This function don't work with non-blocking fd's. |
| 395 | * Any of the possibilities with non-bloking fd's is bad: |
| 396 | * - return a short write (then name is wrong) |
| 397 | * - busy wait adding (errno == EAGAIN) to the loop |
Kirill A. Shutemov | 7b5f699 | 2010-01-20 00:56:08 +0100 | [diff] [blame] | 398 | */ |
| 399 | ssize_t qemu_write_full(int fd, const void *buf, size_t count) |
| 400 | { |
| 401 | ssize_t ret = 0; |
| 402 | ssize_t total = 0; |
| 403 | |
| 404 | while (count) { |
| 405 | ret = write(fd, buf, count); |
| 406 | if (ret < 0) { |
| 407 | if (errno == EINTR) |
| 408 | continue; |
| 409 | break; |
| 410 | } |
| 411 | |
| 412 | count -= ret; |
| 413 | buf += ret; |
| 414 | total += ret; |
| 415 | } |
| 416 | |
| 417 | return total; |
| 418 | } |
| 419 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 420 | /* |
| 421 | * Opens a socket with FD_CLOEXEC set |
| 422 | */ |
| 423 | int qemu_socket(int domain, int type, int protocol) |
| 424 | { |
| 425 | int ret; |
| 426 | |
| 427 | #ifdef SOCK_CLOEXEC |
| 428 | ret = socket(domain, type | SOCK_CLOEXEC, protocol); |
Andre Przywara | 3a03bfa | 2009-12-18 10:45:07 +0100 | [diff] [blame] | 429 | if (ret != -1 || errno != EINVAL) { |
| 430 | return ret; |
| 431 | } |
| 432 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 433 | ret = socket(domain, type, protocol); |
| 434 | if (ret >= 0) { |
| 435 | qemu_set_cloexec(ret); |
| 436 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 437 | |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * Accept a connection and set FD_CLOEXEC |
| 443 | */ |
| 444 | int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen) |
| 445 | { |
| 446 | int ret; |
| 447 | |
| 448 | #ifdef CONFIG_ACCEPT4 |
| 449 | ret = accept4(s, addr, addrlen, SOCK_CLOEXEC); |
Kevin Wolf | 347ed55 | 2010-01-13 16:20:56 +0100 | [diff] [blame] | 450 | if (ret != -1 || errno != ENOSYS) { |
Andre Przywara | 3a03bfa | 2009-12-18 10:45:07 +0100 | [diff] [blame] | 451 | return ret; |
| 452 | } |
| 453 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 454 | ret = accept(s, addr, addrlen); |
| 455 | if (ret >= 0) { |
| 456 | qemu_set_cloexec(ret); |
| 457 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 458 | |
| 459 | return ret; |
| 460 | } |
Paolo Bonzini | 993295f | 2011-09-17 16:27:59 +0200 | [diff] [blame] | 461 | |
Eduardo Habkost | 35c2c8d | 2015-10-30 17:36:08 -0200 | [diff] [blame] | 462 | void qemu_set_hw_version(const char *version) |
Crístian Viana | 93bfef4 | 2012-05-30 00:35:51 -0300 | [diff] [blame] | 463 | { |
Eduardo Habkost | 35c2c8d | 2015-10-30 17:36:08 -0200 | [diff] [blame] | 464 | hw_version = version; |
Crístian Viana | 93bfef4 | 2012-05-30 00:35:51 -0300 | [diff] [blame] | 465 | } |
| 466 | |
Eduardo Habkost | 35c2c8d | 2015-10-30 17:36:08 -0200 | [diff] [blame] | 467 | const char *qemu_hw_version(void) |
Crístian Viana | 93bfef4 | 2012-05-30 00:35:51 -0300 | [diff] [blame] | 468 | { |
Eduardo Habkost | 35c2c8d | 2015-10-30 17:36:08 -0200 | [diff] [blame] | 469 | return hw_version; |
Crístian Viana | 93bfef4 | 2012-05-30 00:35:51 -0300 | [diff] [blame] | 470 | } |
Paul Moore | 0f66998 | 2012-08-03 14:39:21 -0400 | [diff] [blame] | 471 | |
| 472 | void fips_set_state(bool requested) |
| 473 | { |
| 474 | #ifdef __linux__ |
| 475 | if (requested) { |
| 476 | FILE *fds = fopen("/proc/sys/crypto/fips_enabled", "r"); |
| 477 | if (fds != NULL) { |
| 478 | fips_enabled = (fgetc(fds) == '1'); |
| 479 | fclose(fds); |
| 480 | } |
| 481 | } |
| 482 | #else |
| 483 | fips_enabled = false; |
| 484 | #endif /* __linux__ */ |
| 485 | |
| 486 | #ifdef _FIPS_DEBUG |
| 487 | fprintf(stderr, "FIPS mode %s (requested %s)\n", |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 488 | (fips_enabled ? "enabled" : "disabled"), |
| 489 | (requested ? "enabled" : "disabled")); |
Paul Moore | 0f66998 | 2012-08-03 14:39:21 -0400 | [diff] [blame] | 490 | #endif |
| 491 | } |
| 492 | |
| 493 | bool fips_get_state(void) |
| 494 | { |
| 495 | return fips_enabled; |
| 496 | } |
Paolo Bonzini | 0100fbb | 2012-10-29 15:19:18 +0100 | [diff] [blame] | 497 | |
Marc-André Lureau | d3bf825 | 2013-02-25 23:31:11 +0100 | [diff] [blame] | 498 | #ifdef _WIN32 |
| 499 | static void socket_cleanup(void) |
| 500 | { |
| 501 | WSACleanup(); |
| 502 | } |
| 503 | #endif |
| 504 | |
| 505 | int socket_init(void) |
| 506 | { |
| 507 | #ifdef _WIN32 |
| 508 | WSADATA Data; |
| 509 | int ret, err; |
| 510 | |
| 511 | ret = WSAStartup(MAKEWORD(2, 2), &Data); |
| 512 | if (ret != 0) { |
| 513 | err = WSAGetLastError(); |
| 514 | fprintf(stderr, "WSAStartup: %d\n", err); |
| 515 | return -1; |
| 516 | } |
| 517 | atexit(socket_cleanup); |
| 518 | #endif |
| 519 | return 0; |
| 520 | } |
Paolo Bonzini | 9adea5f | 2013-04-21 12:01:06 +0200 | [diff] [blame] | 521 | |
Stefan Hajnoczi | ae2990c | 2013-10-08 11:58:31 +0200 | [diff] [blame] | 522 | |
Paolo Bonzini | 9adea5f | 2013-04-21 12:01:06 +0200 | [diff] [blame] | 523 | #ifndef CONFIG_IOVEC |
| 524 | /* helper function for iov_send_recv() */ |
| 525 | static ssize_t |
| 526 | readv_writev(int fd, const struct iovec *iov, int iov_cnt, bool do_write) |
| 527 | { |
| 528 | unsigned i = 0; |
| 529 | ssize_t ret = 0; |
| 530 | while (i < iov_cnt) { |
| 531 | ssize_t r = do_write |
| 532 | ? write(fd, iov[i].iov_base, iov[i].iov_len) |
| 533 | : read(fd, iov[i].iov_base, iov[i].iov_len); |
| 534 | if (r > 0) { |
| 535 | ret += r; |
| 536 | } else if (!r) { |
| 537 | break; |
| 538 | } else if (errno == EINTR) { |
| 539 | continue; |
| 540 | } else { |
| 541 | /* else it is some "other" error, |
| 542 | * only return if there was no data processed. */ |
| 543 | if (ret == 0) { |
| 544 | ret = -1; |
| 545 | } |
| 546 | break; |
| 547 | } |
| 548 | i++; |
| 549 | } |
| 550 | return ret; |
| 551 | } |
| 552 | |
| 553 | ssize_t |
| 554 | readv(int fd, const struct iovec *iov, int iov_cnt) |
| 555 | { |
| 556 | return readv_writev(fd, iov, iov_cnt, false); |
| 557 | } |
| 558 | |
| 559 | ssize_t |
| 560 | writev(int fd, const struct iovec *iov, int iov_cnt) |
| 561 | { |
| 562 | return readv_writev(fd, iov, iov_cnt, true); |
| 563 | } |
| 564 | #endif |