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file-posix: handle EINTR during ioctl 

Similar to other handle_aiocb_* functions, handle_aiocb_ioctl needs to cater
for the possibility that ioctl is interrupted by a signal.  Otherwise, the
I/O is incorrectly reported as a failure to the guest.

Reported-by: Gordon Watson <gwatson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-06-15 08:34:52 +02:00
parent 09e20abdda
commit bd80936a4f
1 changed files with 3 additions and 1 deletions
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4
block/file-posix.c
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@ -1347,7 +1347,9 @@ static int handle_aiocb_ioctl(void *opaque)
RawPosixAIOData *aiocb = opaque;
int ret;
ret = ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf);
do {
ret = ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
return -errno;
}