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24#include "qemu/osdep.h"
25
26
27
28#if defined(CONFIG_MADVISE) || defined(CONFIG_POSIX_MADVISE)
29#include <sys/mman.h>
30#endif
31
32#ifdef CONFIG_SOLARIS
33#include <sys/statvfs.h>
34
35
36extern int madvise(caddr_t, size_t, int);
37#endif
38
39#include "qemu-common.h"
40#include "qemu/cutils.h"
41#include "qemu/sockets.h"
42#include "qemu/error-report.h"
43#include "monitor/monitor.h"
44
45static bool fips_enabled = false;
46
47
48
49
50
51
52
53
54static const char *hw_version = "2.5+";
55
56int socket_set_cork(int fd, int v)
57{
58#if defined(SOL_TCP) && defined(TCP_CORK)
59 return qemu_setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
60#else
61 return 0;
62#endif
63}
64
65int socket_set_nodelay(int fd)
66{
67 int v = 1;
68 return qemu_setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
69}
70
71int qemu_madvise(void *addr, size_t len, int advice)
72{
73 if (advice == QEMU_MADV_INVALID) {
74 errno = EINVAL;
75 return -1;
76 }
77#if defined(CONFIG_MADVISE)
78 return madvise(addr, len, advice);
79#elif defined(CONFIG_POSIX_MADVISE)
80 return posix_madvise(addr, len, advice);
81#else
82 errno = EINVAL;
83 return -1;
84#endif
85}
86
87#ifndef _WIN32
88
89
90
91static int qemu_dup_flags(int fd, int flags)
92{
93 int ret;
94 int serrno;
95 int dup_flags;
96
97#ifdef F_DUPFD_CLOEXEC
98 ret = fcntl(fd, F_DUPFD_CLOEXEC, 0);
99#else
100 ret = dup(fd);
101 if (ret != -1) {
102 qemu_set_cloexec(ret);
103 }
104#endif
105 if (ret == -1) {
106 goto fail;
107 }
108
109 dup_flags = fcntl(ret, F_GETFL);
110 if (dup_flags == -1) {
111 goto fail;
112 }
113
114 if ((flags & O_SYNC) != (dup_flags & O_SYNC)) {
115 errno = EINVAL;
116 goto fail;
117 }
118
119
120 if (fcntl(ret, F_SETFL, flags) == -1) {
121 goto fail;
122 }
123
124
125 if (flags & O_TRUNC ||
126 ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))) {
127 if (ftruncate(ret, 0) == -1) {
128 goto fail;
129 }
130 }
131
132 return ret;
133
134fail:
135 serrno = errno;
136 if (ret != -1) {
137 close(ret);
138 }
139 errno = serrno;
140 return -1;
141}
142
143static int qemu_parse_fdset(const char *param)
144{
145 return qemu_parse_fd(param);
146}
147#endif
148
149
150
151
152int qemu_open(const char *name, int flags, ...)
153{
154 int ret;
155 int mode = 0;
156
157#ifndef _WIN32
158 const char *fdset_id_str;
159
160
161 if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
162 int64_t fdset_id;
163 int fd, dupfd;
164
165 fdset_id = qemu_parse_fdset(fdset_id_str);
166 if (fdset_id == -1) {
167 errno = EINVAL;
168 return -1;
169 }
170
171 fd = monitor_fdset_get_fd(fdset_id, flags);
172 if (fd == -1) {
173 return -1;
174 }
175
176 dupfd = qemu_dup_flags(fd, flags);
177 if (dupfd == -1) {
178 return -1;
179 }
180
181 ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
182 if (ret == -1) {
183 close(dupfd);
184 errno = EINVAL;
185 return -1;
186 }
187
188 return dupfd;
189 }
190#endif
191
192 if (flags & O_CREAT) {
193 va_list ap;
194
195 va_start(ap, flags);
196 mode = va_arg(ap, int);
197 va_end(ap);
198 }
199
200#ifdef O_CLOEXEC
201 ret = open(name, flags | O_CLOEXEC, mode);
202#else
203 ret = open(name, flags, mode);
204 if (ret >= 0) {
205 qemu_set_cloexec(ret);
206 }
207#endif
208
209#ifdef O_DIRECT
210 if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
211 error_report("file system may not support O_DIRECT");
212 errno = EINVAL;
213 }
214#endif
215
216 return ret;
217}
218
219int qemu_close(int fd)
220{
221 int64_t fdset_id;
222
223
224 fdset_id = monitor_fdset_dup_fd_find(fd);
225 if (fdset_id != -1) {
226 int ret;
227
228 ret = close(fd);
229 if (ret == 0) {
230 monitor_fdset_dup_fd_remove(fd);
231 }
232
233 return ret;
234 }
235
236 return close(fd);
237}
238
239
240
241
242
243
244
245
246
247
248
249
250ssize_t qemu_write_full(int fd, const void *buf, size_t count)
251{
252 ssize_t ret = 0;
253 ssize_t total = 0;
254
255 while (count) {
256 ret = write(fd, buf, count);
257 if (ret < 0) {
258 if (errno == EINTR)
259 continue;
260 break;
261 }
262
263 count -= ret;
264 buf += ret;
265 total += ret;
266 }
267
268 return total;
269}
270
271
272
273
274int qemu_socket(int domain, int type, int protocol)
275{
276 int ret;
277
278#ifdef SOCK_CLOEXEC
279 ret = socket(domain, type | SOCK_CLOEXEC, protocol);
280 if (ret != -1 || errno != EINVAL) {
281 return ret;
282 }
283#endif
284 ret = socket(domain, type, protocol);
285 if (ret >= 0) {
286 qemu_set_cloexec(ret);
287 }
288
289 return ret;
290}
291
292
293
294
295int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
296{
297 int ret;
298
299#ifdef CONFIG_ACCEPT4
300 ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
301 if (ret != -1 || errno != ENOSYS) {
302 return ret;
303 }
304#endif
305 ret = accept(s, addr, addrlen);
306 if (ret >= 0) {
307 qemu_set_cloexec(ret);
308 }
309
310 return ret;
311}
312
313void qemu_set_hw_version(const char *version)
314{
315 hw_version = version;
316}
317
318const char *qemu_hw_version(void)
319{
320 return hw_version;
321}
322
323void fips_set_state(bool requested)
324{
325#ifdef __linux__
326 if (requested) {
327 FILE *fds = fopen("/proc/sys/crypto/fips_enabled", "r");
328 if (fds != NULL) {
329 fips_enabled = (fgetc(fds) == '1');
330 fclose(fds);
331 }
332 }
333#else
334 fips_enabled = false;
335#endif
336
337#ifdef _FIPS_DEBUG
338 fprintf(stderr, "FIPS mode %s (requested %s)\n",
339 (fips_enabled ? "enabled" : "disabled"),
340 (requested ? "enabled" : "disabled"));
341#endif
342}
343
344bool fips_get_state(void)
345{
346 return fips_enabled;
347}
348
349#ifdef _WIN32
350static void socket_cleanup(void)
351{
352 WSACleanup();
353}
354#endif
355
356int socket_init(void)
357{
358#ifdef _WIN32
359 WSADATA Data;
360 int ret, err;
361
362 ret = WSAStartup(MAKEWORD(2, 2), &Data);
363 if (ret != 0) {
364 err = WSAGetLastError();
365 fprintf(stderr, "WSAStartup: %d\n", err);
366 return -1;
367 }
368 atexit(socket_cleanup);
369#endif
370 return 0;
371}
372
373#if !GLIB_CHECK_VERSION(2, 31, 0)
374
375
376
377
378
379
380static void __attribute__((constructor)) thread_init(void)
381{
382 if (!g_thread_supported()) {
383 g_thread_init(NULL);
384 }
385}
386#endif
387
388#ifndef CONFIG_IOVEC
389
390static ssize_t
391readv_writev(int fd, const struct iovec *iov, int iov_cnt, bool do_write)
392{
393 unsigned i = 0;
394 ssize_t ret = 0;
395 while (i < iov_cnt) {
396 ssize_t r = do_write
397 ? write(fd, iov[i].iov_base, iov[i].iov_len)
398 : read(fd, iov[i].iov_base, iov[i].iov_len);
399 if (r > 0) {
400 ret += r;
401 } else if (!r) {
402 break;
403 } else if (errno == EINTR) {
404 continue;
405 } else {
406
407
408 if (ret == 0) {
409 ret = -1;
410 }
411 break;
412 }
413 i++;
414 }
415 return ret;
416}
417
418ssize_t
419readv(int fd, const struct iovec *iov, int iov_cnt)
420{
421 return readv_writev(fd, iov, iov_cnt, false);
422}
423
424ssize_t
425writev(int fd, const struct iovec *iov, int iov_cnt)
426{
427 return readv_writev(fd, iov, iov_cnt, true);
428}
429#endif
430