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 | */ |
| 24 | #include <stdlib.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdarg.h> |
| 27 | #include <string.h> |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 28 | #include <errno.h> |
| 29 | #include <unistd.h> |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 30 | #include <fcntl.h> |
Juan Quintela | dfe5fff | 2009-07-27 16:12:40 +0200 | [diff] [blame] | 31 | #ifdef CONFIG_SOLARIS |
ths | 605686c | 2007-01-17 23:31:19 +0000 | [diff] [blame] | 32 | #include <sys/types.h> |
| 33 | #include <sys/statvfs.h> |
| 34 | #endif |
bellard | ea88812 | 2004-02-16 22:12:40 +0000 | [diff] [blame] | 35 | |
Juan Quintela | 71e72a1 | 2009-07-27 16:12:56 +0200 | [diff] [blame] | 36 | /* Needed early for CONFIG_BSD etc. */ |
blueswir1 | d40cdb1 | 2009-03-07 16:52:02 +0000 | [diff] [blame] | 37 | #include "config-host.h" |
| 38 | |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 39 | #ifdef _WIN32 |
| 40 | #include <windows.h> |
Juan Quintela | 71e72a1 | 2009-07-27 16:12:56 +0200 | [diff] [blame] | 41 | #elif defined(CONFIG_BSD) |
bellard | 194884d | 2005-02-21 20:10:36 +0000 | [diff] [blame] | 42 | #include <stdlib.h> |
| 43 | #else |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 44 | #include <malloc.h> |
bellard | 194884d | 2005-02-21 20:10:36 +0000 | [diff] [blame] | 45 | #endif |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 46 | |
blueswir1 | 511d2b1 | 2009-03-07 15:32:56 +0000 | [diff] [blame] | 47 | #include "qemu-common.h" |
| 48 | #include "sysemu.h" |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 49 | #include "qemu_socket.h" |
| 50 | |
Blue Swirl | d741429 | 2009-09-12 12:36:04 +0000 | [diff] [blame] | 51 | #if !defined(_POSIX_C_SOURCE) || defined(_WIN32) || defined(__sun__) |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 52 | static void *oom_check(void *ptr) |
| 53 | { |
| 54 | if (ptr == NULL) { |
| 55 | abort(); |
| 56 | } |
| 57 | return ptr; |
| 58 | } |
| 59 | #endif |
| 60 | |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 61 | #if defined(_WIN32) |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 62 | void *qemu_memalign(size_t alignment, size_t size) |
| 63 | { |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 64 | if (!size) { |
| 65 | abort(); |
| 66 | } |
| 67 | return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 68 | } |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 69 | |
| 70 | void *qemu_vmalloc(size_t size) |
| 71 | { |
| 72 | /* FIXME: this is not exactly optimal solution since VirtualAlloc |
| 73 | has 64Kb granularity, but at least it guarantees us that the |
| 74 | memory is page aligned. */ |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 75 | if (!size) { |
| 76 | abort(); |
| 77 | } |
| 78 | return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE)); |
bellard | 6e4255f | 2005-04-17 18:33:47 +0000 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | void qemu_vfree(void *ptr) |
| 82 | { |
| 83 | VirtualFree(ptr, 0, MEM_RELEASE); |
| 84 | } |
| 85 | |
pbrook | 6cb7ee8 | 2006-05-22 14:10:48 +0000 | [diff] [blame] | 86 | #else |
| 87 | |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 88 | void *qemu_memalign(size_t alignment, size_t size) |
| 89 | { |
Blue Swirl | d741429 | 2009-09-12 12:36:04 +0000 | [diff] [blame] | 90 | #if defined(_POSIX_C_SOURCE) && !defined(__sun__) |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 91 | int ret; |
| 92 | void *ptr; |
| 93 | ret = posix_memalign(&ptr, alignment, size); |
| 94 | if (ret != 0) |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 95 | abort(); |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 96 | return ptr; |
Juan Quintela | 71e72a1 | 2009-07-27 16:12:56 +0200 | [diff] [blame] | 97 | #elif defined(CONFIG_BSD) |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 98 | return oom_check(valloc(size)); |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 99 | #else |
malc | d644f8b | 2009-07-08 18:24:05 +0400 | [diff] [blame] | 100 | return oom_check(memalign(alignment, size)); |
balrog | 33f0027 | 2007-12-24 14:33:24 +0000 | [diff] [blame] | 101 | #endif |
| 102 | } |
| 103 | |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 104 | /* alloc shared memory pages */ |
| 105 | void *qemu_vmalloc(size_t size) |
| 106 | { |
malc | 48253bd | 2008-11-18 01:42:15 +0000 | [diff] [blame] | 107 | return qemu_memalign(getpagesize(), size); |
bellard | 49b470e | 2005-02-10 21:59:25 +0000 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | void qemu_vfree(void *ptr) |
| 111 | { |
| 112 | free(ptr); |
| 113 | } |
| 114 | |
| 115 | #endif |
| 116 | |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 117 | int qemu_create_pidfile(const char *filename) |
| 118 | { |
| 119 | char buffer[128]; |
| 120 | int len; |
| 121 | #ifndef _WIN32 |
| 122 | int fd; |
| 123 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 124 | fd = qemu_open(filename, O_RDWR | O_CREAT, 0600); |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 125 | if (fd == -1) |
| 126 | return -1; |
| 127 | |
| 128 | if (lockf(fd, F_TLOCK, 0) == -1) |
| 129 | return -1; |
| 130 | |
| 131 | len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid()); |
| 132 | if (write(fd, buffer, len) != len) |
| 133 | return -1; |
| 134 | #else |
| 135 | HANDLE file; |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 136 | OVERLAPPED overlap; |
| 137 | BOOL ret; |
Juha Riihimäki | 099fe23 | 2009-12-03 15:56:03 +0200 | [diff] [blame] | 138 | memset(&overlap, 0, sizeof(overlap)); |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 139 | |
Juha Riihimäki | 099fe23 | 2009-12-03 15:56:03 +0200 | [diff] [blame] | 140 | file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 141 | OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); |
| 142 | |
| 143 | if (file == INVALID_HANDLE_VALUE) |
| 144 | return -1; |
| 145 | |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 146 | len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid()); |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 147 | ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len, |
ths | aa26bb2 | 2007-03-25 21:33:06 +0000 | [diff] [blame] | 148 | &overlap, NULL); |
| 149 | if (ret == 0) |
| 150 | return -1; |
| 151 | #endif |
| 152 | return 0; |
| 153 | } |
pbrook | 29b3a66 | 2007-06-07 23:09:47 +0000 | [diff] [blame] | 154 | |
| 155 | #ifdef _WIN32 |
| 156 | |
| 157 | /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */ |
| 158 | #define _W32_FT_OFFSET (116444736000000000ULL) |
| 159 | |
| 160 | int qemu_gettimeofday(qemu_timeval *tp) |
| 161 | { |
| 162 | union { |
| 163 | unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */ |
| 164 | FILETIME ft; |
| 165 | } _now; |
| 166 | |
| 167 | if(tp) |
| 168 | { |
| 169 | GetSystemTimeAsFileTime (&_now.ft); |
| 170 | tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL ); |
| 171 | tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL); |
| 172 | } |
| 173 | /* Always return 0 as per Open Group Base Specifications Issue 6. |
| 174 | Do not set errno on error. */ |
| 175 | return 0; |
| 176 | } |
| 177 | #endif /* _WIN32 */ |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 178 | |
| 179 | |
| 180 | #ifdef _WIN32 |
| 181 | void socket_set_nonblock(int fd) |
| 182 | { |
| 183 | unsigned long opt = 1; |
| 184 | ioctlsocket(fd, FIONBIO, &opt); |
| 185 | } |
| 186 | |
| 187 | int inet_aton(const char *cp, struct in_addr *ia) |
| 188 | { |
| 189 | uint32_t addr = inet_addr(cp); |
| 190 | if (addr == 0xffffffff) |
| 191 | return 0; |
| 192 | ia->s_addr = addr; |
| 193 | return 1; |
| 194 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 195 | |
| 196 | void qemu_set_cloexec(int fd) |
| 197 | { |
| 198 | } |
| 199 | |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 200 | #else |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 201 | |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 202 | void socket_set_nonblock(int fd) |
| 203 | { |
| 204 | int f; |
| 205 | f = fcntl(fd, F_GETFL); |
| 206 | fcntl(fd, F_SETFL, f | O_NONBLOCK); |
| 207 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 208 | |
| 209 | void qemu_set_cloexec(int fd) |
| 210 | { |
| 211 | int f; |
| 212 | f = fcntl(fd, F_GETFD); |
| 213 | fcntl(fd, F_SETFD, f | FD_CLOEXEC); |
| 214 | } |
| 215 | |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 216 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 217 | |
| 218 | /* |
| 219 | * Opens a file with FD_CLOEXEC set |
| 220 | */ |
| 221 | int qemu_open(const char *name, int flags, ...) |
| 222 | { |
| 223 | int ret; |
| 224 | int mode = 0; |
| 225 | |
| 226 | if (flags & O_CREAT) { |
| 227 | va_list ap; |
| 228 | |
| 229 | va_start(ap, flags); |
| 230 | mode = va_arg(ap, int); |
| 231 | va_end(ap); |
| 232 | } |
| 233 | |
| 234 | #ifdef O_CLOEXEC |
| 235 | ret = open(name, flags | O_CLOEXEC, mode); |
| 236 | #else |
| 237 | ret = open(name, flags, mode); |
| 238 | if (ret >= 0) { |
| 239 | qemu_set_cloexec(ret); |
| 240 | } |
| 241 | #endif |
| 242 | |
| 243 | return ret; |
| 244 | } |
| 245 | |
Kirill A. Shutemov | 7b5f699 | 2010-01-20 00:56:08 +0100 | [diff] [blame^] | 246 | /* |
| 247 | * A variant of write(2) which handles partial write. |
| 248 | * |
| 249 | * Return the number of bytes transferred. |
| 250 | * Set errno if fewer than `count' bytes are written. |
| 251 | */ |
| 252 | ssize_t qemu_write_full(int fd, const void *buf, size_t count) |
| 253 | { |
| 254 | ssize_t ret = 0; |
| 255 | ssize_t total = 0; |
| 256 | |
| 257 | while (count) { |
| 258 | ret = write(fd, buf, count); |
| 259 | if (ret < 0) { |
| 260 | if (errno == EINTR) |
| 261 | continue; |
| 262 | break; |
| 263 | } |
| 264 | |
| 265 | count -= ret; |
| 266 | buf += ret; |
| 267 | total += ret; |
| 268 | } |
| 269 | |
| 270 | return total; |
| 271 | } |
| 272 | |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 273 | #ifndef _WIN32 |
| 274 | /* |
| 275 | * Creates a pipe with FD_CLOEXEC set on both file descriptors |
| 276 | */ |
| 277 | int qemu_pipe(int pipefd[2]) |
| 278 | { |
| 279 | int ret; |
| 280 | |
| 281 | #ifdef CONFIG_PIPE2 |
| 282 | ret = pipe2(pipefd, O_CLOEXEC); |
Andre Przywara | 3a03bfa | 2009-12-18 10:45:07 +0100 | [diff] [blame] | 283 | if (ret != -1 || errno != ENOSYS) { |
| 284 | return ret; |
| 285 | } |
| 286 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 287 | ret = pipe(pipefd); |
| 288 | if (ret == 0) { |
| 289 | qemu_set_cloexec(pipefd[0]); |
| 290 | qemu_set_cloexec(pipefd[1]); |
| 291 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 292 | |
| 293 | return ret; |
| 294 | } |
| 295 | #endif |
| 296 | |
| 297 | /* |
| 298 | * Opens a socket with FD_CLOEXEC set |
| 299 | */ |
| 300 | int qemu_socket(int domain, int type, int protocol) |
| 301 | { |
| 302 | int ret; |
| 303 | |
| 304 | #ifdef SOCK_CLOEXEC |
| 305 | ret = socket(domain, type | SOCK_CLOEXEC, protocol); |
Andre Przywara | 3a03bfa | 2009-12-18 10:45:07 +0100 | [diff] [blame] | 306 | if (ret != -1 || errno != EINVAL) { |
| 307 | return ret; |
| 308 | } |
| 309 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 310 | ret = socket(domain, type, protocol); |
| 311 | if (ret >= 0) { |
| 312 | qemu_set_cloexec(ret); |
| 313 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 314 | |
| 315 | return ret; |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * Accept a connection and set FD_CLOEXEC |
| 320 | */ |
| 321 | int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen) |
| 322 | { |
| 323 | int ret; |
| 324 | |
| 325 | #ifdef CONFIG_ACCEPT4 |
| 326 | ret = accept4(s, addr, addrlen, SOCK_CLOEXEC); |
Kevin Wolf | 347ed55 | 2010-01-13 16:20:56 +0100 | [diff] [blame] | 327 | if (ret != -1 || errno != ENOSYS) { |
Andre Przywara | 3a03bfa | 2009-12-18 10:45:07 +0100 | [diff] [blame] | 328 | return ret; |
| 329 | } |
| 330 | #endif |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 331 | ret = accept(s, addr, addrlen); |
| 332 | if (ret >= 0) { |
| 333 | qemu_set_cloexec(ret); |
| 334 | } |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 335 | |
| 336 | return ret; |
| 337 | } |