linux-user: Implement copy_file_range
Signed-off-by: Andreas Schwab <schwab@suse.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <mvm361eer3n.fsf@suse.de> [lv: copy back offset only if there is no error] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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@ -813,6 +813,12 @@ safe_syscall5(int, mq_timedsend, int, mqdes, const char *, msg_ptr,
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safe_syscall5(int, mq_timedreceive, int, mqdes, char *, msg_ptr,
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safe_syscall5(int, mq_timedreceive, int, mqdes, char *, msg_ptr,
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size_t, len, unsigned *, prio, const struct timespec *, timeout)
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size_t, len, unsigned *, prio, const struct timespec *, timeout)
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#endif
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#endif
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#if defined(TARGET_NR_copy_file_range) && defined(__NR_copy_file_range)
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safe_syscall6(ssize_t, copy_file_range, int, infd, loff_t *, pinoff,
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int, outfd, loff_t *, poutoff, size_t, length,
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unsigned int, flags)
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#endif
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/* We do ioctl like this rather than via safe_syscall3 to preserve the
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/* We do ioctl like this rather than via safe_syscall3 to preserve the
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* "third argument might be integer or pointer or not present" behaviour of
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* "third argument might be integer or pointer or not present" behaviour of
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* the libc function.
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* the libc function.
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@ -13065,6 +13071,42 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
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return get_errno(membarrier(arg1, arg2));
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return get_errno(membarrier(arg1, arg2));
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#endif
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#endif
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#if defined(TARGET_NR_copy_file_range) && defined(__NR_copy_file_range)
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case TARGET_NR_copy_file_range:
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{
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loff_t inoff, outoff;
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loff_t *pinoff = NULL, *poutoff = NULL;
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if (arg2) {
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if (get_user_u64(inoff, arg2)) {
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return -TARGET_EFAULT;
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}
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pinoff = &inoff;
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}
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if (arg4) {
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if (get_user_u64(outoff, arg4)) {
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return -TARGET_EFAULT;
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}
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poutoff = &outoff;
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}
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ret = get_errno(safe_copy_file_range(arg1, pinoff, arg3, poutoff,
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arg5, arg6));
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if (!is_error(ret) && ret > 0) {
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if (arg2) {
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if (put_user_u64(inoff, arg2)) {
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return -TARGET_EFAULT;
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}
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}
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if (arg4) {
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if (put_user_u64(outoff, arg4)) {
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return -TARGET_EFAULT;
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}
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}
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}
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}
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return ret;
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#endif
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default:
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default:
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qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
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qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
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return -TARGET_ENOSYS;
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return -TARGET_ENOSYS;
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