2004-02-16 23:12:40 +01:00
|
|
|
/*
|
|
|
|
* QEMU low level functions
|
2007-09-16 23:08:06 +02:00
|
|
|
*
|
2004-02-16 23:12:40 +01:00
|
|
|
* Copyright (c) 2003 Fabrice Bellard
|
2007-09-16 23:08:06 +02:00
|
|
|
*
|
2004-02-16 23:12:40 +01:00
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* in the Software without restriction, including without limitation the rights
|
|
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice shall be included in
|
|
|
|
* all copies or substantial portions of the Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
|
|
* THE SOFTWARE.
|
|
|
|
*/
|
2016-01-29 18:49:55 +01:00
|
|
|
#include "qemu/osdep.h"
|
2020-08-21 18:45:02 +02:00
|
|
|
#include "qapi/error.h"
|
2010-02-02 20:33:11 +01:00
|
|
|
|
|
|
|
/* Needed early for CONFIG_BSD etc. */
|
|
|
|
|
2009-07-27 16:12:40 +02:00
|
|
|
#ifdef CONFIG_SOLARIS
|
2007-01-18 00:31:19 +01:00
|
|
|
#include <sys/statvfs.h>
|
2010-09-25 13:26:05 +02:00
|
|
|
/* See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for
|
|
|
|
discussion about Solaris header problems */
|
2019-01-17 12:43:53 +01:00
|
|
|
extern int madvise(char *, size_t, int);
|
2007-01-18 00:31:19 +01:00
|
|
|
#endif
|
2004-02-16 23:12:40 +01:00
|
|
|
|
2022-02-16 19:18:21 +01:00
|
|
|
#include <dirent.h>
|
2009-03-07 16:32:56 +01:00
|
|
|
#include "qemu-common.h"
|
2016-03-20 18:16:19 +01:00
|
|
|
#include "qemu/cutils.h"
|
2012-12-17 18:20:00 +01:00
|
|
|
#include "qemu/sockets.h"
|
2015-03-17 18:29:20 +01:00
|
|
|
#include "qemu/error-report.h"
|
2022-02-08 21:08:52 +01:00
|
|
|
#include "qemu/madvise.h"
|
2022-02-08 21:08:53 +01:00
|
|
|
#include "qemu/mprotect.h"
|
2012-12-17 18:19:49 +01:00
|
|
|
#include "monitor/monitor.h"
|
2008-09-15 17:51:35 +02:00
|
|
|
|
2012-08-03 20:39:21 +02:00
|
|
|
static bool fips_enabled = false;
|
|
|
|
|
2016-04-09 21:42:44 +02:00
|
|
|
static const char *hw_version = QEMU_HW_VERSION;
|
2012-05-30 05:35:51 +02:00
|
|
|
|
2011-09-21 12:36:48 +02:00
|
|
|
int socket_set_cork(int fd, int v)
|
|
|
|
{
|
|
|
|
#if defined(SOL_TCP) && defined(TCP_CORK)
|
2013-03-06 15:29:16 +01:00
|
|
|
return qemu_setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
|
2011-09-21 12:36:48 +02:00
|
|
|
#else
|
|
|
|
return 0;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2013-02-22 04:39:50 +01:00
|
|
|
int socket_set_nodelay(int fd)
|
|
|
|
{
|
|
|
|
int v = 1;
|
2013-03-06 15:29:16 +01:00
|
|
|
return qemu_setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
|
2013-02-22 04:39:50 +01:00
|
|
|
}
|
|
|
|
|
2010-09-25 13:26:05 +02:00
|
|
|
int qemu_madvise(void *addr, size_t len, int advice)
|
|
|
|
{
|
|
|
|
if (advice == QEMU_MADV_INVALID) {
|
|
|
|
errno = EINVAL;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
#if defined(CONFIG_MADVISE)
|
|
|
|
return madvise(addr, len, advice);
|
|
|
|
#elif defined(CONFIG_POSIX_MADVISE)
|
|
|
|
return posix_madvise(addr, len, advice);
|
|
|
|
#else
|
|
|
|
errno = EINVAL;
|
|
|
|
return -1;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2017-07-15 08:28:47 +02:00
|
|
|
static int qemu_mprotect__osdep(void *addr, size_t size, int prot)
|
|
|
|
{
|
|
|
|
g_assert(!((uintptr_t)addr & ~qemu_real_host_page_mask));
|
|
|
|
g_assert(!(size & ~qemu_real_host_page_mask));
|
|
|
|
|
|
|
|
#ifdef _WIN32
|
|
|
|
DWORD old_protect;
|
|
|
|
|
|
|
|
if (!VirtualProtect(addr, size, prot, &old_protect)) {
|
2020-02-28 11:07:24 +01:00
|
|
|
g_autofree gchar *emsg = g_win32_error_message(GetLastError());
|
|
|
|
error_report("%s: VirtualProtect failed: %s", __func__, emsg);
|
2017-07-15 08:28:47 +02:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
#else
|
|
|
|
if (mprotect(addr, size, prot)) {
|
|
|
|
error_report("%s: mprotect failed: %s", __func__, strerror(errno));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2021-03-11 00:47:33 +01:00
|
|
|
int qemu_mprotect_rw(void *addr, size_t size)
|
|
|
|
{
|
|
|
|
#ifdef _WIN32
|
|
|
|
return qemu_mprotect__osdep(addr, size, PAGE_READWRITE);
|
|
|
|
#else
|
|
|
|
return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2017-07-15 08:28:47 +02:00
|
|
|
int qemu_mprotect_rwx(void *addr, size_t size)
|
|
|
|
{
|
|
|
|
#ifdef _WIN32
|
|
|
|
return qemu_mprotect__osdep(addr, size, PAGE_EXECUTE_READWRITE);
|
|
|
|
#else
|
|
|
|
return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_mprotect_none(void *addr, size_t size)
|
|
|
|
{
|
|
|
|
#ifdef _WIN32
|
|
|
|
return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS);
|
|
|
|
#else
|
|
|
|
return qemu_mprotect__osdep(addr, size, PROT_NONE);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2012-08-14 22:43:47 +02:00
|
|
|
#ifndef _WIN32
|
2017-08-11 13:44:46 +02:00
|
|
|
|
|
|
|
static int fcntl_op_setlk = -1;
|
|
|
|
static int fcntl_op_getlk = -1;
|
|
|
|
|
2012-08-14 22:43:47 +02:00
|
|
|
/*
|
|
|
|
* Dups an fd and sets the flags
|
|
|
|
*/
|
2020-08-27 14:27:00 +02:00
|
|
|
int qemu_dup_flags(int fd, int flags)
|
2012-08-14 22:43:47 +02:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
int serrno;
|
|
|
|
int dup_flags;
|
|
|
|
|
2016-06-22 14:53:19 +02:00
|
|
|
ret = qemu_dup(fd);
|
2012-08-14 22:43:47 +02:00
|
|
|
if (ret == -1) {
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
dup_flags = fcntl(ret, F_GETFL);
|
|
|
|
if (dup_flags == -1) {
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((flags & O_SYNC) != (dup_flags & O_SYNC)) {
|
|
|
|
errno = EINVAL;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set/unset flags that we can with fcntl */
|
2012-10-18 22:41:04 +02:00
|
|
|
if (fcntl(ret, F_SETFL, flags) == -1) {
|
2012-08-14 22:43:47 +02:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Truncate the file in the cases that open() would truncate it */
|
|
|
|
if (flags & O_TRUNC ||
|
|
|
|
((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))) {
|
|
|
|
if (ftruncate(ret, 0) == -1) {
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
serrno = errno;
|
|
|
|
if (ret != -1) {
|
|
|
|
close(ret);
|
|
|
|
}
|
|
|
|
errno = serrno;
|
|
|
|
return -1;
|
|
|
|
}
|
2012-10-29 15:19:18 +01:00
|
|
|
|
2016-06-22 14:53:19 +02:00
|
|
|
int qemu_dup(int fd)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
#ifdef F_DUPFD_CLOEXEC
|
|
|
|
ret = fcntl(fd, F_DUPFD_CLOEXEC, 0);
|
|
|
|
#else
|
|
|
|
ret = dup(fd);
|
|
|
|
if (ret != -1) {
|
|
|
|
qemu_set_cloexec(ret);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-10-29 15:19:18 +01:00
|
|
|
static int qemu_parse_fdset(const char *param)
|
|
|
|
{
|
|
|
|
return qemu_parse_fd(param);
|
|
|
|
}
|
2017-05-02 18:35:54 +02:00
|
|
|
|
2017-08-11 13:44:46 +02:00
|
|
|
static void qemu_probe_lock_ops(void)
|
|
|
|
{
|
|
|
|
if (fcntl_op_setlk == -1) {
|
|
|
|
#ifdef F_OFD_SETLK
|
|
|
|
int fd;
|
|
|
|
int ret;
|
|
|
|
struct flock fl = {
|
|
|
|
.l_whence = SEEK_SET,
|
|
|
|
.l_start = 0,
|
|
|
|
.l_len = 0,
|
|
|
|
.l_type = F_WRLCK,
|
|
|
|
};
|
|
|
|
|
|
|
|
fd = open("/dev/null", O_RDWR);
|
|
|
|
if (fd < 0) {
|
|
|
|
fprintf(stderr,
|
|
|
|
"Failed to open /dev/null for OFD lock probing: %s\n",
|
|
|
|
strerror(errno));
|
|
|
|
fcntl_op_setlk = F_SETLK;
|
|
|
|
fcntl_op_getlk = F_GETLK;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
ret = fcntl(fd, F_OFD_GETLK, &fl);
|
|
|
|
close(fd);
|
|
|
|
if (!ret) {
|
|
|
|
fcntl_op_setlk = F_OFD_SETLK;
|
|
|
|
fcntl_op_getlk = F_OFD_GETLK;
|
|
|
|
} else {
|
|
|
|
fcntl_op_setlk = F_SETLK;
|
|
|
|
fcntl_op_getlk = F_GETLK;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
fcntl_op_setlk = F_SETLK;
|
|
|
|
fcntl_op_getlk = F_GETLK;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
bool qemu_has_ofd_lock(void)
|
|
|
|
{
|
|
|
|
qemu_probe_lock_ops();
|
|
|
|
#ifdef F_OFD_SETLK
|
|
|
|
return fcntl_op_setlk == F_OFD_SETLK;
|
|
|
|
#else
|
|
|
|
return false;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2017-05-02 18:35:54 +02:00
|
|
|
static int qemu_lock_fcntl(int fd, int64_t start, int64_t len, int fl_type)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct flock fl = {
|
|
|
|
.l_whence = SEEK_SET,
|
|
|
|
.l_start = start,
|
|
|
|
.l_len = len,
|
|
|
|
.l_type = fl_type,
|
|
|
|
};
|
2017-08-11 13:44:46 +02:00
|
|
|
qemu_probe_lock_ops();
|
2017-12-26 07:53:00 +01:00
|
|
|
do {
|
|
|
|
ret = fcntl(fd, fcntl_op_setlk, &fl);
|
|
|
|
} while (ret == -1 && errno == EINTR);
|
2017-05-02 18:35:54 +02:00
|
|
|
return ret == -1 ? -errno : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive)
|
|
|
|
{
|
|
|
|
return qemu_lock_fcntl(fd, start, len, exclusive ? F_WRLCK : F_RDLCK);
|
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_unlock_fd(int fd, int64_t start, int64_t len)
|
|
|
|
{
|
|
|
|
return qemu_lock_fcntl(fd, start, len, F_UNLCK);
|
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct flock fl = {
|
|
|
|
.l_whence = SEEK_SET,
|
|
|
|
.l_start = start,
|
|
|
|
.l_len = len,
|
|
|
|
.l_type = exclusive ? F_WRLCK : F_RDLCK,
|
|
|
|
};
|
2017-08-11 13:44:46 +02:00
|
|
|
qemu_probe_lock_ops();
|
|
|
|
ret = fcntl(fd, fcntl_op_getlk, &fl);
|
2017-05-02 18:35:54 +02:00
|
|
|
if (ret == -1) {
|
|
|
|
return -errno;
|
|
|
|
} else {
|
|
|
|
return fl.l_type == F_UNLCK ? 0 : -EAGAIN;
|
|
|
|
}
|
|
|
|
}
|
2012-08-14 22:43:47 +02:00
|
|
|
#endif
|
2008-09-15 17:51:35 +02:00
|
|
|
|
2020-09-02 17:58:06 +02:00
|
|
|
static int qemu_open_cloexec(const char *name, int flags, mode_t mode)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
#ifdef O_CLOEXEC
|
|
|
|
ret = open(name, flags | O_CLOEXEC, mode);
|
|
|
|
#else
|
|
|
|
ret = open(name, flags, mode);
|
|
|
|
if (ret >= 0) {
|
|
|
|
qemu_set_cloexec(ret);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-12-02 12:24:42 +01:00
|
|
|
/*
|
|
|
|
* Opens a file with FD_CLOEXEC set
|
|
|
|
*/
|
2020-07-01 17:30:35 +02:00
|
|
|
static int
|
2020-08-21 18:45:02 +02:00
|
|
|
qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
|
2009-12-02 12:24:42 +01:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2012-08-14 22:43:47 +02:00
|
|
|
#ifndef _WIN32
|
|
|
|
const char *fdset_id_str;
|
|
|
|
|
|
|
|
/* Attempt dup of fd from fd set */
|
|
|
|
if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
|
|
|
|
int64_t fdset_id;
|
2020-08-27 14:27:00 +02:00
|
|
|
int dupfd;
|
2012-08-14 22:43:47 +02:00
|
|
|
|
|
|
|
fdset_id = qemu_parse_fdset(fdset_id_str);
|
|
|
|
if (fdset_id == -1) {
|
2020-08-21 18:45:02 +02:00
|
|
|
error_setg(errp, "Could not parse fdset %s", name);
|
2012-08-14 22:43:47 +02:00
|
|
|
errno = EINVAL;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2020-08-27 14:27:00 +02:00
|
|
|
dupfd = monitor_fdset_dup_fd_add(fdset_id, flags);
|
2012-08-14 22:43:47 +02:00
|
|
|
if (dupfd == -1) {
|
2020-08-21 18:45:02 +02:00
|
|
|
error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
|
|
|
|
name, flags);
|
2012-08-14 22:43:47 +02:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return dupfd;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2020-07-01 17:30:35 +02:00
|
|
|
ret = qemu_open_cloexec(name, flags, mode);
|
|
|
|
|
2020-08-21 18:45:02 +02:00
|
|
|
if (ret == -1) {
|
|
|
|
const char *action = flags & O_CREAT ? "create" : "open";
|
2020-07-21 17:17:35 +02:00
|
|
|
#ifdef O_DIRECT
|
|
|
|
/* Give more helpful error message for O_DIRECT */
|
|
|
|
if (errno == EINVAL && (flags & O_DIRECT)) {
|
|
|
|
ret = open(name, flags & ~O_DIRECT, mode);
|
|
|
|
if (ret != -1) {
|
|
|
|
close(ret);
|
|
|
|
error_setg(errp, "Could not %s '%s': "
|
|
|
|
"filesystem does not support O_DIRECT",
|
|
|
|
action, name);
|
|
|
|
errno = EINVAL; /* restore first open()'s errno */
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* O_DIRECT */
|
2020-08-21 18:45:02 +02:00
|
|
|
error_setg_errno(errp, errno, "Could not %s '%s'",
|
|
|
|
action, name);
|
|
|
|
}
|
|
|
|
|
2020-07-01 17:30:35 +02:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-12-02 12:24:42 +01:00
|
|
|
|
2020-07-01 17:30:35 +02:00
|
|
|
int qemu_open(const char *name, int flags, Error **errp)
|
|
|
|
{
|
|
|
|
assert(!(flags & O_CREAT));
|
|
|
|
|
|
|
|
return qemu_open_internal(name, flags, 0, errp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int qemu_create(const char *name, int flags, mode_t mode, Error **errp)
|
|
|
|
{
|
|
|
|
assert(!(flags & O_CREAT));
|
|
|
|
|
|
|
|
return qemu_open_internal(name, flags | O_CREAT, mode, errp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2020-07-01 17:30:35 +02:00
|
|
|
int qemu_open_old(const char *name, int flags, ...)
|
|
|
|
{
|
|
|
|
va_list ap;
|
|
|
|
mode_t mode = 0;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
va_start(ap, flags);
|
|
|
|
if (flags & O_CREAT) {
|
2009-12-02 12:24:42 +01:00
|
|
|
mode = va_arg(ap, int);
|
|
|
|
}
|
2020-07-01 17:30:35 +02:00
|
|
|
va_end(ap);
|
2009-12-02 12:24:42 +01:00
|
|
|
|
2020-08-21 18:45:02 +02:00
|
|
|
ret = qemu_open_internal(name, flags, mode, NULL);
|
2009-12-02 12:24:42 +01:00
|
|
|
|
2013-08-22 11:29:03 +02:00
|
|
|
#ifdef O_DIRECT
|
|
|
|
if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
|
|
|
|
error_report("file system may not support O_DIRECT");
|
|
|
|
errno = EINVAL; /* in case it was clobbered */
|
|
|
|
}
|
|
|
|
#endif /* O_DIRECT */
|
|
|
|
|
2009-12-02 12:24:42 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-08-14 22:43:46 +02:00
|
|
|
int qemu_close(int fd)
|
|
|
|
{
|
2012-08-14 22:43:47 +02:00
|
|
|
int64_t fdset_id;
|
|
|
|
|
|
|
|
/* Close fd that was dup'd from an fdset */
|
|
|
|
fdset_id = monitor_fdset_dup_fd_find(fd);
|
|
|
|
if (fdset_id != -1) {
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = close(fd);
|
|
|
|
if (ret == 0) {
|
|
|
|
monitor_fdset_dup_fd_remove(fd);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-08-14 22:43:46 +02:00
|
|
|
return close(fd);
|
|
|
|
}
|
|
|
|
|
2019-11-08 15:09:56 +01:00
|
|
|
/*
|
|
|
|
* Delete a file from the filesystem, unless the filename is /dev/fdset/...
|
|
|
|
*
|
|
|
|
* Returns: On success, zero is returned. On error, -1 is returned,
|
|
|
|
* and errno is set appropriately.
|
|
|
|
*/
|
|
|
|
int qemu_unlink(const char *name)
|
|
|
|
{
|
|
|
|
if (g_str_has_prefix(name, "/dev/fdset/")) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return unlink(name);
|
|
|
|
}
|
|
|
|
|
2010-01-20 00:56:08 +01:00
|
|
|
/*
|
|
|
|
* A variant of write(2) which handles partial write.
|
|
|
|
*
|
|
|
|
* Return the number of bytes transferred.
|
|
|
|
* Set errno if fewer than `count' bytes are written.
|
2010-03-04 10:00:39 +01:00
|
|
|
*
|
|
|
|
* This function don't work with non-blocking fd's.
|
2020-09-17 09:50:24 +02:00
|
|
|
* Any of the possibilities with non-blocking fd's is bad:
|
2010-03-04 10:00:39 +01:00
|
|
|
* - return a short write (then name is wrong)
|
|
|
|
* - busy wait adding (errno == EAGAIN) to the loop
|
2010-01-20 00:56:08 +01:00
|
|
|
*/
|
|
|
|
ssize_t qemu_write_full(int fd, const void *buf, size_t count)
|
|
|
|
{
|
|
|
|
ssize_t ret = 0;
|
|
|
|
ssize_t total = 0;
|
|
|
|
|
|
|
|
while (count) {
|
|
|
|
ret = write(fd, buf, count);
|
|
|
|
if (ret < 0) {
|
|
|
|
if (errno == EINTR)
|
|
|
|
continue;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
count -= ret;
|
|
|
|
buf += ret;
|
|
|
|
total += ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return total;
|
|
|
|
}
|
|
|
|
|
2009-12-02 12:24:42 +01:00
|
|
|
/*
|
|
|
|
* Opens a socket with FD_CLOEXEC set
|
|
|
|
*/
|
|
|
|
int qemu_socket(int domain, int type, int protocol)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
#ifdef SOCK_CLOEXEC
|
|
|
|
ret = socket(domain, type | SOCK_CLOEXEC, protocol);
|
2009-12-18 10:45:07 +01:00
|
|
|
if (ret != -1 || errno != EINVAL) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
2009-12-02 12:24:42 +01:00
|
|
|
ret = socket(domain, type, protocol);
|
|
|
|
if (ret >= 0) {
|
|
|
|
qemu_set_cloexec(ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Accept a connection and set FD_CLOEXEC
|
|
|
|
*/
|
|
|
|
int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
#ifdef CONFIG_ACCEPT4
|
|
|
|
ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
|
2010-01-13 16:20:56 +01:00
|
|
|
if (ret != -1 || errno != ENOSYS) {
|
2009-12-18 10:45:07 +01:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
2009-12-02 12:24:42 +01:00
|
|
|
ret = accept(s, addr, addrlen);
|
|
|
|
if (ret >= 0) {
|
|
|
|
qemu_set_cloexec(ret);
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
2011-09-17 16:27:59 +02:00
|
|
|
|
2015-10-30 20:36:08 +01:00
|
|
|
void qemu_set_hw_version(const char *version)
|
2012-05-30 05:35:51 +02:00
|
|
|
{
|
2015-10-30 20:36:08 +01:00
|
|
|
hw_version = version;
|
2012-05-30 05:35:51 +02:00
|
|
|
}
|
|
|
|
|
2015-10-30 20:36:08 +01:00
|
|
|
const char *qemu_hw_version(void)
|
2012-05-30 05:35:51 +02:00
|
|
|
{
|
2015-10-30 20:36:08 +01:00
|
|
|
return hw_version;
|
2012-05-30 05:35:51 +02:00
|
|
|
}
|
2012-08-03 20:39:21 +02:00
|
|
|
|
|
|
|
void fips_set_state(bool requested)
|
|
|
|
{
|
|
|
|
#ifdef __linux__
|
|
|
|
if (requested) {
|
|
|
|
FILE *fds = fopen("/proc/sys/crypto/fips_enabled", "r");
|
|
|
|
if (fds != NULL) {
|
|
|
|
fips_enabled = (fgetc(fds) == '1');
|
|
|
|
fclose(fds);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
fips_enabled = false;
|
|
|
|
#endif /* __linux__ */
|
|
|
|
|
|
|
|
#ifdef _FIPS_DEBUG
|
|
|
|
fprintf(stderr, "FIPS mode %s (requested %s)\n",
|
2018-12-13 23:37:37 +01:00
|
|
|
(fips_enabled ? "enabled" : "disabled"),
|
|
|
|
(requested ? "enabled" : "disabled"));
|
2012-08-03 20:39:21 +02:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
bool fips_get_state(void)
|
|
|
|
{
|
|
|
|
return fips_enabled;
|
|
|
|
}
|
2012-10-29 15:19:18 +01:00
|
|
|
|
2013-02-25 23:31:11 +01:00
|
|
|
#ifdef _WIN32
|
|
|
|
static void socket_cleanup(void)
|
|
|
|
{
|
|
|
|
WSACleanup();
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
int socket_init(void)
|
|
|
|
{
|
|
|
|
#ifdef _WIN32
|
|
|
|
WSADATA Data;
|
|
|
|
int ret, err;
|
|
|
|
|
|
|
|
ret = WSAStartup(MAKEWORD(2, 2), &Data);
|
|
|
|
if (ret != 0) {
|
|
|
|
err = WSAGetLastError();
|
|
|
|
fprintf(stderr, "WSAStartup: %d\n", err);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
atexit(socket_cleanup);
|
|
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
}
|
2013-04-21 12:01:06 +02:00
|
|
|
|
2013-10-08 11:58:31 +02:00
|
|
|
|
2013-04-21 12:01:06 +02:00
|
|
|
#ifndef CONFIG_IOVEC
|
|
|
|
/* helper function for iov_send_recv() */
|
|
|
|
static ssize_t
|
|
|
|
readv_writev(int fd, const struct iovec *iov, int iov_cnt, bool do_write)
|
|
|
|
{
|
|
|
|
unsigned i = 0;
|
|
|
|
ssize_t ret = 0;
|
|
|
|
while (i < iov_cnt) {
|
|
|
|
ssize_t r = do_write
|
|
|
|
? write(fd, iov[i].iov_base, iov[i].iov_len)
|
|
|
|
: read(fd, iov[i].iov_base, iov[i].iov_len);
|
|
|
|
if (r > 0) {
|
|
|
|
ret += r;
|
|
|
|
} else if (!r) {
|
|
|
|
break;
|
|
|
|
} else if (errno == EINTR) {
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
/* else it is some "other" error,
|
|
|
|
* only return if there was no data processed. */
|
|
|
|
if (ret == 0) {
|
|
|
|
ret = -1;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t
|
|
|
|
readv(int fd, const struct iovec *iov, int iov_cnt)
|
|
|
|
{
|
|
|
|
return readv_writev(fd, iov, iov_cnt, false);
|
|
|
|
}
|
|
|
|
|
|
|
|
ssize_t
|
|
|
|
writev(int fd, const struct iovec *iov, int iov_cnt)
|
|
|
|
{
|
|
|
|
return readv_writev(fd, iov, iov_cnt, true);
|
|
|
|
}
|
|
|
|
#endif
|
2022-02-16 19:18:21 +01:00
|
|
|
|
|
|
|
struct dirent *
|
|
|
|
qemu_dirent_dup(struct dirent *dent)
|
|
|
|
{
|
|
|
|
size_t sz = 0;
|
|
|
|
#if defined _DIRENT_HAVE_D_RECLEN
|
|
|
|
/* Avoid use of strlen() if platform supports d_reclen. */
|
|
|
|
sz = dent->d_reclen;
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Test sz for zero even if d_reclen is available
|
|
|
|
* because some drivers may set d_reclen to zero.
|
|
|
|
*/
|
|
|
|
if (sz == 0) {
|
|
|
|
/* Fallback to the most portable way. */
|
|
|
|
sz = offsetof(struct dirent, d_name) +
|
|
|
|
strlen(dent->d_name) + 1;
|
|
|
|
}
|
|
|
|
return g_memdup(dent, sz);
|
|
|
|
}
|