165     android::base::unique_fd fd(  in __has_memfd_support()  local
167     if (fd == -1) {  in __has_memfd_support()
172     if (fcntl(fd, F_ADD_SEALS, F_SEAL_FUTURE_WRITE) == -1) {  in __has_memfd_support()
213     int fd = TEMP_FAILURE_RETRY(open(ashmem_device_path.c_str(), O_RDWR | O_CLOEXEC));  in __ashmem_open_locked()  local
216     if (fd < 0) {  in __ashmem_open_locked()
218         fd = TEMP_FAILURE_RETRY(open("/dev/ashmem", O_RDWR | O_CLOEXEC));  in __ashmem_open_locked()
219         if (fd < 0) {  in __ashmem_open_locked()
224             return fd;  in __ashmem_open_locked()
228     int ret = TEMP_FAILURE_RETRY(fstat(fd, &st));  in __ashmem_open_locked()
231         close(fd);  in __ashmem_open_locked()
236         close(fd);  in __ashmem_open_locked()
242     return fd;  in __ashmem_open_locked()
247     int fd;  in __ashmem_open()  local
250     fd = __ashmem_open_locked();  in __ashmem_open()
253     return fd;  in __ashmem_open()
257 static int __ashmem_is_ashmem(int fd, int fatal)  in __ashmem_is_ashmem()  argument
262     if (fstat(fd, &st) < 0) {  in __ashmem_is_ashmem()
273             int fd = __ashmem_open_locked();  in __ashmem_is_ashmem()  local
274             if (fd < 0) {  in __ashmem_is_ashmem()
281             close(fd);  in __ashmem_is_ashmem()
292               fd, st.st_mode, major(st.st_rdev), minor(st.st_rdev),  in __ashmem_is_ashmem()
297               fd, st.st_mode, major(st.st_rdev), minor(st.st_rdev),  in __ashmem_is_ashmem()
307 static int __ashmem_check_failure(int fd, int result)  in __ashmem_check_failure()  argument
309     if (result == -1 && errno == ENOTTY) __ashmem_is_ashmem(fd, 1);  in __ashmem_check_failure()
313 static bool memfd_is_ashmem(int fd) {  in memfd_is_ashmem()  argument
316     if (__ashmem_is_ashmem(fd, 0) == 0) {  in memfd_is_ashmem()
328 int ashmem_valid(int fd)  in ashmem_valid()  argument
330     if (has_memfd_support() && !memfd_is_ashmem(fd)) {  in ashmem_valid()
334     return __ashmem_is_ashmem(fd, 0) >= 0;  in ashmem_valid()
340     android::base::unique_fd fd(syscall(__NR_memfd_create, name, MFD_CLOEXEC | MFD_ALLOW_SEALING));  in memfd_create_region()  local
342     if (fd == -1) {  in memfd_create_region()
347     if (ftruncate(fd, size) == -1) {  in memfd_create_region()
353     if (fcntl(fd, F_ADD_SEALS, F_SEAL_GROW | F_SEAL_SHRINK) == -1) {  in memfd_create_region()
359         ALOGE("memfd_create(%s, %zd) success. fd=%d\n", name, size, fd.get());  in memfd_create_region()
361     return fd.release();  in memfd_create_region()
379     int fd = __ashmem_open();  in ashmem_create_region()  local
380     if (fd < 0) {  in ashmem_create_region()
381         return fd;  in ashmem_create_region()
388         ret = TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_SET_NAME, buf));  in ashmem_create_region()
394     ret = TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_SET_SIZE, size));  in ashmem_create_region()
399     return fd;  in ashmem_create_region()
403     close(fd);  in ashmem_create_region()
408 static int memfd_set_prot_region(int fd, int prot) {  in memfd_set_prot_region()  argument
409     int seals = fcntl(fd, F_GET_SEALS);  in memfd_set_prot_region()
411         ALOGE("memfd_set_prot_region(%d, %d): F_GET_SEALS failed: %s\n", fd, prot, strerror(errno));  in memfd_set_prot_region()
420             ALOGE("memfd_set_prot_region(%d, %d): region is write protected\n", fd, prot);  in memfd_set_prot_region()
429     if (fcntl(fd, F_ADD_SEALS, F_SEAL_FUTURE_WRITE | F_SEAL_SEAL) == -1) {  in memfd_set_prot_region()
431               fd, prot, strerror(errno));  in memfd_set_prot_region()
438 int ashmem_set_prot_region(int fd, int prot)  in ashmem_set_prot_region()  argument
440     if (has_memfd_support() && !memfd_is_ashmem(fd)) {  in ashmem_set_prot_region()
441         return memfd_set_prot_region(fd, prot);  in ashmem_set_prot_region()
444     return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_SET_PROT_MASK, prot)));  in ashmem_set_prot_region()
447 int ashmem_pin_region(int fd, size_t offset, size_t len)  in ashmem_pin_region()  argument
454     if (has_memfd_support() && !memfd_is_ashmem(fd)) {  in ashmem_pin_region()
460     return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_PIN, &pin)));  in ashmem_pin_region()
463 int ashmem_unpin_region(int fd, size_t offset, size_t len)  in ashmem_unpin_region()  argument
470     if (has_memfd_support() && !memfd_is_ashmem(fd)) {  in ashmem_unpin_region()
476     return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_UNPIN, &pin)));  in ashmem_unpin_region()
479 int ashmem_get_size_region(int fd)  in ashmem_get_size_region()  argument
481     if (has_memfd_support() && !memfd_is_ashmem(fd)) {  in ashmem_get_size_region()
484         if (fstat(fd, &sb) == -1) {  in ashmem_get_size_region()
485             ALOGE("ashmem_get_size_region(%d): fstat failed: %s\n", fd, strerror(errno));  in ashmem_get_size_region()
490             ALOGD("ashmem_get_size_region(%d): %d\n", fd, static_cast<int>(sb.st_size));  in ashmem_get_size_region()
496     return __ashmem_check_failure(fd, TEMP_FAILURE_RETRY(ioctl(fd, ASHMEM_GET_SIZE, NULL)));  in ashmem_get_size_region()