From: Elena Ufimtseva <elena.ufimts...@oracle.com>
Adds QIO channel functions that transmits the input iovs as well as the
supplied fds.
Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: John G Johnson <john.g.john...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
---
include/io/channel.h | 24 ++++++++++++++++++++++++
io/channel.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+)
diff --git a/include/io/channel.h b/include/io/channel.h
index 4d6fe45..0aa44e1 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -773,5 +773,29 @@ void qio_channel_set_aio_fd_handler(QIOChannel *ioc,
IOHandler *io_read,
IOHandler *io_write,
void *opaque);
+/**
+ * qio_channel_writev_full_all:
+ * @ioc: the channel object
+ * @iov: the array of memory regions to write data from
+ * @niov: the length of the @iov array
+ * @fds: an array of file handles to send
+ * @nfds: number of file handles in @fds
+ * @errp: pointer to a NULL-initialized error object
+ *
+ *
+ * Behaves like qio_channel_writev_full but will attempt
+ * to send all data passed (file handles and memory regions).
+ * The function will wait for all requested data
+ * to be written, yielding from the current coroutine
+ * if required.
+ *
+ * Returns: 0 if all bytes were written, or -1 on error
+ */
+
+int qio_channel_writev_full_all(QIOChannel *ioc,
+ const struct iovec *iov,
+ size_t niov,
+ int *fds, size_t nfds,
+ Error **errp);
#endif /* QIO_CHANNEL_H */
diff --git a/io/channel.c b/io/channel.c
index 93d449d..255dd46 100644
--- a/io/channel.c
+++ b/io/channel.c
@@ -190,6 +190,51 @@ int qio_channel_writev_all(QIOChannel *ioc,
return ret;
}
+int qio_channel_writev_full_all(QIOChannel *ioc,
+ const struct iovec *iov,
+ size_t niov,
+ int *fds, size_t nfds,
+ Error **errp)
+{
+ int ret = -1;
+ struct iovec *local_iov = g_new(struct iovec, niov);
+ struct iovec *local_iov_head = local_iov;
+ unsigned int nlocal_iov = niov;
+
+ nlocal_iov = iov_copy(local_iov, nlocal_iov,
+ iov, niov,
+ 0, iov_size(iov, niov));
+
+ while (nlocal_iov > 0) {
+ ssize_t len;
+ len = qio_channel_writev_full(ioc, local_iov, nlocal_iov, fds,
+ nfds, errp);
+ if (len == QIO_CHANNEL_ERR_BLOCK) {
+ if (qemu_in_coroutine()) {
+ qio_channel_yield(ioc, G_IO_OUT);
+ } else {
+ qio_channel_wait(ioc, G_IO_OUT);
+ }
+ continue;
+ }
+ if (len < 0) {
+ goto cleanup;
+ }
+
+ iov_discard_front(&local_iov, &nlocal_iov, len);
+
+ if (len > 0) {
+ fds = NULL;
+ nfds = 0;
+ }
+ }
+
+ ret = 0;
+ cleanup:
+ g_free(local_iov_head);
+ return ret;
+}
+
ssize_t qio_channel_readv(QIOChannel *ioc,
const struct iovec *iov,
size_t niov,
--
1.8.3.1
