diff options
Diffstat (limited to 'contrib/qemu/util/oslib-posix.c')
| -rw-r--r-- | contrib/qemu/util/oslib-posix.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/contrib/qemu/util/oslib-posix.c b/contrib/qemu/util/oslib-posix.c deleted file mode 100644 index 45f9ca5a156..00000000000 --- a/contrib/qemu/util/oslib-posix.c +++ /dev/null @@ -1,255 +0,0 @@ -/* - * os-posix-lib.c - * - * Copyright (c) 2003-2008 Fabrice Bellard - * Copyright (c) 2010 Red Hat, Inc. - * - * QEMU library functions on POSIX which are shared between QEMU and - * the QEMU tools. - * - * 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. - */ - -/* The following block of code temporarily renames the daemon() function so the - compiler does not see the warning associated with it in stdlib.h on OSX */ -#ifdef __APPLE__ -#define daemon qemu_fake_daemon_function -#include <stdlib.h> -#undef daemon -extern int daemon(int, int); -#endif - -#if defined(__linux__) && (defined(__x86_64__) || defined(__arm__)) - /* Use 2 MiB alignment so transparent hugepages can be used by KVM. - Valgrind does not support alignments larger than 1 MiB, - therefore we need special code which handles running on Valgrind. */ -# define QEMU_VMALLOC_ALIGN (512 * 4096) -#elif defined(__linux__) && defined(__s390x__) - /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */ -# define QEMU_VMALLOC_ALIGN (256 * 4096) -#else -# define QEMU_VMALLOC_ALIGN getpagesize() -#endif - -#include <glib/gprintf.h> - -#include "config-host.h" -#include "qemu-common.h" -#include "sysemu/sysemu.h" -#include "trace.h" -#include "qemu/sockets.h" -#include <sys/mman.h> - -#ifdef CONFIG_LINUX -#include <sys/syscall.h> -#endif - -int qemu_get_thread_id(void) -{ -#if defined(__linux__) - return syscall(SYS_gettid); -#else - return getpid(); -#endif -} - -int qemu_daemon(int nochdir, int noclose) -{ - return daemon(nochdir, noclose); -} - -void *qemu_oom_check(void *ptr) -{ - if (ptr == NULL) { - fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno)); - abort(); - } - return ptr; -} - -void *qemu_memalign(size_t alignment, size_t size) -{ - void *ptr; -#if defined(_POSIX_C_SOURCE) && !defined(__sun__) || defined(__APPLE__) - int ret; - ret = posix_memalign(&ptr, alignment, size); - if (ret != 0) { - fprintf(stderr, "Failed to allocate %zu B: %s\n", - size, strerror(ret)); - abort(); - } -#elif defined(GF_BSD_HOST_OS) - ptr = qemu_oom_check(valloc(size)); -#else - ptr = qemu_oom_check(memalign(alignment, size)); -#endif - trace_qemu_memalign(alignment, size, ptr); - return ptr; -} - -/* alloc shared memory pages */ -void *qemu_anon_ram_alloc(size_t size) -{ - size_t align = QEMU_VMALLOC_ALIGN; - size_t total = size + align - getpagesize(); - void *ptr = mmap(0, total, PROT_READ | PROT_WRITE, - MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr; - - if (ptr == MAP_FAILED) { - fprintf(stderr, "Failed to allocate %zu B: %s\n", - size, strerror(errno)); - abort(); - } - - ptr += offset; - total -= offset; - - if (offset > 0) { - munmap(ptr - offset, offset); - } - if (total > size) { - munmap(ptr + size, total - size); - } - - trace_qemu_anon_ram_alloc(size, ptr); - return ptr; -} - -void qemu_vfree(void *ptr) -{ - trace_qemu_vfree(ptr); - free(ptr); -} - -void qemu_anon_ram_free(void *ptr, size_t size) -{ - trace_qemu_anon_ram_free(ptr, size); - if (ptr) { - munmap(ptr, size); - } -} - -void qemu_set_block(int fd) -{ - int f; - f = fcntl(fd, F_GETFL); - fcntl(fd, F_SETFL, f & ~O_NONBLOCK); -} - -void qemu_set_nonblock(int fd) -{ - int f; - f = fcntl(fd, F_GETFL); - fcntl(fd, F_SETFL, f | O_NONBLOCK); -} - -void qemu_set_cloexec(int fd) -{ - int f; - f = fcntl(fd, F_GETFD); - fcntl(fd, F_SETFD, f | FD_CLOEXEC); -} - -/* - * Creates a pipe with FD_CLOEXEC set on both file descriptors - */ -int qemu_pipe(int pipefd[2]) -{ - int ret; - -#ifdef CONFIG_PIPE2 -#ifdef pipe2 - ret = pipe2(pipefd, O_CLOEXEC); - if (ret != -1 || errno != ENOSYS) { - return ret; - } -#endif -#endif - ret = pipe(pipefd); - if (ret == 0) { - qemu_set_cloexec(pipefd[0]); - qemu_set_cloexec(pipefd[1]); - } - - return ret; -} - -#ifndef UTIME_OMIT -#define UTIME_OMIT ((1l << 30) - 2l) -#endif -#ifndef UTIME_NOW -#define UTIME_NOW ((1l << 30) - 1l) -#endif - -int qemu_utimens(const char *path, const struct timespec *times) -{ - struct timeval tv[2], tv_now; - struct stat st; - int i; -#if defined(CONFIG_UTIMENSAT) -#ifdef utimensat - int ret; - - ret = utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW); - if (ret != -1 || errno != ENOSYS) { - return ret; - } -#endif -#endif - /* Fallback: use utimes() instead of utimensat() */ - - /* happy if special cases */ - if (times[0].tv_nsec == UTIME_OMIT && times[1].tv_nsec == UTIME_OMIT) { - return 0; - } - if (times[0].tv_nsec == UTIME_NOW && times[1].tv_nsec == UTIME_NOW) { - return utimes(path, NULL); - } - - /* prepare for hard cases */ - if (times[0].tv_nsec == UTIME_NOW || times[1].tv_nsec == UTIME_NOW) { - gettimeofday(&tv_now, NULL); - } - if (times[0].tv_nsec == UTIME_OMIT || times[1].tv_nsec == UTIME_OMIT) { - stat(path, &st); - } - - for (i = 0; i < 2; i++) { - if (times[i].tv_nsec == UTIME_NOW) { - tv[i].tv_sec = tv_now.tv_sec; - tv[i].tv_usec = tv_now.tv_usec; - } else if (times[i].tv_nsec == UTIME_OMIT) { - tv[i].tv_sec = (i == 0) ? st.st_atime : st.st_mtime; - tv[i].tv_usec = 0; - } else { - tv[i].tv_sec = times[i].tv_sec; - tv[i].tv_usec = times[i].tv_nsec / 1000; - } - } - - return utimes(path, &tv[0]); -} - -char * -qemu_get_local_state_pathname(const char *relative_pathname) -{ - return g_strdup_printf("%s/%s", CONFIG_QEMU_LOCALSTATEDIR, - relative_pathname); -} |