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io: add qio_channel_readv_full_all_eof & qio_channel_readv_full_all helpers

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Adds qio_channel_readv_full_all_eof() and qio_channel_readv_full_all()
to read both data and FDs. Refactors existing code to use these helpers.

Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: b059c4cc0fb741e794d644c144cc21372cad877d.1611938319.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Elena Ufimtseva 2021-01-29 11:46:09 -05:00 • committed by Stefan Hajnoczi
parent bfa4238750
commit bebab91ebd
2 changed files with 134 additions and 20 deletions
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53
include/io/channel.h
View file

@ -777,6 +777,59 @@ void qio_channel_set_aio_fd_handler(QIOChannel *ioc,
IOHandler *io_write,
void *opaque);
/**
* qio_channel_readv_full_all_eof:
* @ioc: the channel object
* @iov: the array of memory regions to read data to
* @niov: the length of the @iov array
* @fds: an array of file handles to read
* @nfds: number of file handles in @fds
* @errp: pointer to a NULL-initialized error object
*
*
* Performs same function as qio_channel_readv_all_eof.
* Additionally, attempts to read file descriptors shared
* over the channel. The function will wait for all
* requested data to be read, yielding from the current
* coroutine if required. data refers to both file
* descriptors and the iovs.
*
* Returns: 1 if all bytes were read, 0 if end-of-file
* occurs without data, or -1 on error
*/
int qio_channel_readv_full_all_eof(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int **fds, size_t *nfds,
Error **errp);
/**
* qio_channel_readv_full_all:
* @ioc: the channel object
* @iov: the array of memory regions to read data to
* @niov: the length of the @iov array
* @fds: an array of file handles to read
* @nfds: number of file handles in @fds
* @errp: pointer to a NULL-initialized error object
*
*
* Performs same function as qio_channel_readv_all_eof.
* Additionally, attempts to read file descriptors shared
* over the channel. The function will wait for all
* requested data to be read, yielding from the current
* coroutine if required. data refers to both file
* descriptors and the iovs.
*
* Returns: 0 if all bytes were read, or -1 on error
*/
int qio_channel_readv_full_all(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
int **fds, size_t *nfds,
Error **errp);
/**
* qio_channel_writev_full_all:
* @ioc: the channel object