Per POSIX, aio_read() and aio_write() must return -1 and set errno to
EINVAL when the request cannot be queued (aio_reqprio < 0,
aio_offset < 0), and the error must also be retrievable via
aio_error(). Conversely, when queuing fails with a bad file
descriptor, the error belongs to the asynchronous operation: the
functions must return 0 and report EBADF through aio_error().
- Merge the offset/reqprio checks and return ERROR with errno set,
after storing the result in aio_result for aio_error().
- Drop the aio_fildes < 0 early return: a closed descriptor is now
caught by fcntl()/aio_queue() and reported through aio_result with
the function returning OK.
- aio_error(): report -EINVAL (failed validation) through errno
instead of returning it as an error value.
Signed-off-by: tengshuangshuang <tengshuangshuang@xiaomi.com>
4cec501584