=head1 NAME

nbd_aio_notify_read - notify that the connection is readable

=head1 SYNOPSIS

 #include <libnbd.h>

 int nbd_aio_notify_read (
       struct nbd_handle *h
     );

=head1 DESCRIPTION

Send notification to the state machine that the connection
is readable.  Typically this is called after your main loop
has detected that the file descriptor associated with this
connection is readable.

=head1 RETURN VALUE

If the call is successful the function returns C<0>.

=head1 ERRORS

On error C<-1> is returned.

Refer to L<libnbd(3)/ERROR HANDLING>
for how to get further details of the error.

The following parameters must not be NULL: C<h>.
For more information see L<libnbd(3)/Non-NULL parameters>.

=head1 VERSION

This function first appeared in libnbd 1.0.

If you need to test if this function is available at compile time
check if the following macro is defined:

 #define LIBNBD_HAVE_NBD_AIO_NOTIFY_READ 1

=head1 SEE ALSO

L<nbd_create(3)>,
L<libnbd(3)>.

=head1 AUTHORS

Eric Blake

Richard W.M. Jones

=head1 COPYRIGHT

Copyright Red Hat
