#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
+#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
-#ifdef CONFIG_SOLARIS
-#include <sys/types.h>
-#include <sys/statvfs.h>
-#endif
/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"
-#ifdef _WIN32
-#include <windows.h>
-#elif defined(CONFIG_BSD)
-#include <stdlib.h>
-#else
-#include <malloc.h>
+#if defined(CONFIG_MADVISE) || defined(CONFIG_POSIX_MADVISE)
+#include <sys/mman.h>
+#endif
+
+#ifdef CONFIG_SOLARIS
+#include <sys/types.h>
+#include <sys/statvfs.h>
+/* See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for
+ discussion about Solaris header problems */
+extern int madvise(caddr_t, size_t, int);
#endif
#include "qemu-common.h"
-#include "sysemu.h"
+#include "trace.h"
#include "qemu_socket.h"
+#include "monitor.h"
-#if !defined(_POSIX_C_SOURCE) || defined(_WIN32) || defined(__sun__)
-static void *oom_check(void *ptr)
-{
- if (ptr == NULL) {
- abort();
- }
- return ptr;
-}
-#endif
+static bool fips_enabled = false;
-#if defined(_WIN32)
-void *qemu_memalign(size_t alignment, size_t size)
-{
- if (!size) {
- abort();
- }
- return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
-}
+static const char *qemu_version = QEMU_VERSION;
-void *qemu_vmalloc(size_t size)
+static int default_fdset_get_fd(int64_t fdset_id, int flags)
{
- /* FIXME: this is not exactly optimal solution since VirtualAlloc
- has 64Kb granularity, but at least it guarantees us that the
- memory is page aligned. */
- if (!size) {
- abort();
- }
- return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
+ return -1;
}
+QEMU_WEAK_ALIAS(monitor_fdset_get_fd, default_fdset_get_fd);
+#define monitor_fdset_get_fd \
+ QEMU_WEAK_REF(monitor_fdset_get_fd, default_fdset_get_fd)
-void qemu_vfree(void *ptr)
+static int default_fdset_dup_fd_add(int64_t fdset_id, int dup_fd)
{
- VirtualFree(ptr, 0, MEM_RELEASE);
+ return -1;
}
+QEMU_WEAK_ALIAS(monitor_fdset_dup_fd_add, default_fdset_dup_fd_add);
+#define monitor_fdset_dup_fd_add \
+ QEMU_WEAK_REF(monitor_fdset_dup_fd_add, default_fdset_dup_fd_add)
-#else
-
-void *qemu_memalign(size_t alignment, size_t size)
+static int default_fdset_dup_fd_remove(int dup_fd)
{
-#if defined(_POSIX_C_SOURCE) && !defined(__sun__)
- int ret;
- void *ptr;
- ret = posix_memalign(&ptr, alignment, size);
- if (ret != 0)
- abort();
- return ptr;
-#elif defined(CONFIG_BSD)
- return oom_check(valloc(size));
-#else
- return oom_check(memalign(alignment, size));
-#endif
+ return -1;
}
+QEMU_WEAK_ALIAS(monitor_fdset_dup_fd_remove, default_fdset_dup_fd_remove);
+#define monitor_fdset_dup_fd_remove \
+ QEMU_WEAK_REF(monitor_fdset_dup_fd_remove, default_fdset_dup_fd_remove)
-/* alloc shared memory pages */
-void *qemu_vmalloc(size_t size)
+static int default_fdset_dup_fd_find(int dup_fd)
{
- return qemu_memalign(getpagesize(), size);
+ return -1;
}
+QEMU_WEAK_ALIAS(monitor_fdset_dup_fd_find, default_fdset_dup_fd_find);
+#define monitor_fdset_dup_fd_find \
+ QEMU_WEAK_REF(monitor_fdset_dup_fd_remove, default_fdset_dup_fd_find)
-void qemu_vfree(void *ptr)
+int socket_set_cork(int fd, int v)
{
- free(ptr);
-}
-
+#if defined(SOL_TCP) && defined(TCP_CORK)
+ return setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
+#else
+ return 0;
#endif
+}
-int qemu_create_pidfile(const char *filename)
+int qemu_madvise(void *addr, size_t len, int advice)
{
- char buffer[128];
- int len;
-#ifndef _WIN32
- int fd;
-
- fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
- if (fd == -1)
- return -1;
-
- if (lockf(fd, F_TLOCK, 0) == -1)
- return -1;
-
- len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
- if (write(fd, buffer, len) != len)
+ 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
- HANDLE file;
- DWORD flags;
- OVERLAPPED overlap;
- BOOL ret;
-
- /* Open for writing with no sharing. */
- file = CreateFile(filename, GENERIC_WRITE, 0, NULL,
- OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
-
- if (file == INVALID_HANDLE_VALUE)
- return -1;
-
- flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
- overlap.hEvent = 0;
- /* Lock 1 byte. */
- ret = LockFileEx(file, flags, 0, 0, 1, &overlap);
- if (ret == 0)
- return -1;
-
- /* Write PID to file. */
- len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
- ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
- &overlap, NULL);
- if (ret == 0)
- return -1;
+ errno = EINVAL;
+ return -1;
#endif
- return 0;
}
-#ifdef _WIN32
-
-/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
-#define _W32_FT_OFFSET (116444736000000000ULL)
-
-int qemu_gettimeofday(qemu_timeval *tp)
+#ifndef _WIN32
+/*
+ * Dups an fd and sets the flags
+ */
+static int qemu_dup_flags(int fd, int flags)
{
- union {
- unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
- FILETIME ft;
- } _now;
-
- if(tp)
- {
- GetSystemTimeAsFileTime (&_now.ft);
- tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
- tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
+ int ret;
+ int serrno;
+ int dup_flags;
+
+#ifdef F_DUPFD_CLOEXEC
+ ret = fcntl(fd, F_DUPFD_CLOEXEC, 0);
+#else
+ ret = dup(fd);
+ if (ret != -1) {
+ qemu_set_cloexec(ret);
+ }
+#endif
+ if (ret == -1) {
+ goto fail;
}
- /* Always return 0 as per Open Group Base Specifications Issue 6.
- Do not set errno on error. */
- return 0;
-}
-#endif /* _WIN32 */
+ dup_flags = fcntl(ret, F_GETFL);
+ if (dup_flags == -1) {
+ goto fail;
+ }
-#ifdef _WIN32
-void socket_set_nonblock(int fd)
-{
- unsigned long opt = 1;
- ioctlsocket(fd, FIONBIO, &opt);
-}
+ if ((flags & O_SYNC) != (dup_flags & O_SYNC)) {
+ errno = EINVAL;
+ goto fail;
+ }
-int inet_aton(const char *cp, struct in_addr *ia)
-{
- uint32_t addr = inet_addr(cp);
- if (addr == 0xffffffff)
- return 0;
- ia->s_addr = addr;
- return 1;
-}
+ /* Set/unset flags that we can with fcntl */
+ if (fcntl(ret, F_SETFL, flags) == -1) {
+ goto fail;
+ }
-void qemu_set_cloexec(int fd)
-{
-}
+ /* 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;
+ }
+ }
-#else
+ return ret;
-void socket_set_nonblock(int fd)
-{
- int f;
- f = fcntl(fd, F_GETFL);
- fcntl(fd, F_SETFL, f | O_NONBLOCK);
+fail:
+ serrno = errno;
+ if (ret != -1) {
+ close(ret);
+ }
+ errno = serrno;
+ return -1;
}
-void qemu_set_cloexec(int fd)
+static int qemu_parse_fdset(const char *param)
{
- int f;
- f = fcntl(fd, F_GETFD);
- fcntl(fd, F_SETFD, f | FD_CLOEXEC);
+ return qemu_parse_fd(param);
}
-
#endif
/*
int ret;
int mode = 0;
+#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;
+ int fd, dupfd;
+
+ fdset_id = qemu_parse_fdset(fdset_id_str);
+ if (fdset_id == -1) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ fd = monitor_fdset_get_fd(fdset_id, flags);
+ if (fd == -1) {
+ return -1;
+ }
+
+ dupfd = qemu_dup_flags(fd, flags);
+ if (dupfd == -1) {
+ return -1;
+ }
+
+ ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
+ if (ret == -1) {
+ close(dupfd);
+ errno = EINVAL;
+ return -1;
+ }
+
+ return dupfd;
+ }
+#endif
+
if (flags & O_CREAT) {
va_list ap;
return ret;
}
-#ifndef _WIN32
+int qemu_close(int fd)
+{
+ 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;
+ }
+
+ return close(fd);
+}
+
/*
- * Creates a pipe with FD_CLOEXEC set on both file descriptors
+ * A variant of write(2) which handles partial write.
+ *
+ * Return the number of bytes transferred.
+ * Set errno if fewer than `count' bytes are written.
+ *
+ * This function don't work with non-blocking fd's.
+ * Any of the possibilities with non-bloking fd's is bad:
+ * - return a short write (then name is wrong)
+ * - busy wait adding (errno == EAGAIN) to the loop
*/
-int qemu_pipe(int pipefd[2])
+ssize_t qemu_write_full(int fd, const void *buf, size_t count)
{
- int ret;
-
-#ifdef CONFIG_PIPE2
- ret = pipe2(pipefd, O_CLOEXEC);
-#else
- ret = pipe(pipefd);
- if (ret == 0) {
- qemu_set_cloexec(pipefd[0]);
- qemu_set_cloexec(pipefd[1]);
+ 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;
}
-#endif
- return ret;
+ return total;
}
-#endif
/*
* Opens a socket with FD_CLOEXEC set
#ifdef SOCK_CLOEXEC
ret = socket(domain, type | SOCK_CLOEXEC, protocol);
-#else
+ if (ret != -1 || errno != EINVAL) {
+ return ret;
+ }
+#endif
ret = socket(domain, type, protocol);
if (ret >= 0) {
qemu_set_cloexec(ret);
}
-#endif
return ret;
}
#ifdef CONFIG_ACCEPT4
ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
-#else
+ if (ret != -1 || errno != ENOSYS) {
+ return ret;
+ }
+#endif
ret = accept(s, addr, addrlen);
if (ret >= 0) {
qemu_set_cloexec(ret);
}
-#endif
return ret;
}
+
+/*
+ * A variant of send(2) which handles partial write.
+ *
+ * Return the number of bytes transferred, which is only
+ * smaller than `count' if there is an error.
+ *
+ * This function won't work with non-blocking fd's.
+ * Any of the possibilities with non-bloking fd's is bad:
+ * - return a short write (then name is wrong)
+ * - busy wait adding (errno == EAGAIN) to the loop
+ */
+ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
+{
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = send(fd, buf, count, flags);
+ if (ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
+ }
+
+ return total;
+}
+
+/*
+ * A variant of recv(2) which handles partial write.
+ *
+ * Return the number of bytes transferred, which is only
+ * smaller than `count' if there is an error.
+ *
+ * This function won't work with non-blocking fd's.
+ * Any of the possibilities with non-bloking fd's is bad:
+ * - return a short write (then name is wrong)
+ * - busy wait adding (errno == EAGAIN) to the loop
+ */
+ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
+{
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = qemu_recv(fd, buf, count, flags);
+ if (ret <= 0) {
+ if (ret < 0 && errno == EINTR) {
+ continue;
+ }
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
+ }
+
+ return total;
+}
+
+void qemu_set_version(const char *version)
+{
+ qemu_version = version;
+}
+
+const char *qemu_get_version(void)
+{
+ return qemu_version;
+}
+
+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",
+ (fips_enabled ? "enabled" : "disabled"),
+ (requested ? "enabled" : "disabled"));
+#endif
+}
+
+bool fips_get_state(void)
+{
+ return fips_enabled;
+}
+
projects / qemu.git / blobdiff