virtiofsd: Add main virtio loop
Processes incoming requests on the vhost-user fd. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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@ -11,12 +11,14 @@
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* See the file COPYING.LIB
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*/
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#include "fuse_virtio.h"
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#include "fuse_i.h"
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#include "standard-headers/linux/fuse.h"
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#include "fuse_misc.h"
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#include "fuse_opt.h"
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#include "fuse_virtio.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -80,15 +82,49 @@ static const VuDevIface fv_iface = {
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.queue_is_processed_in_order = fv_queue_order,
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};
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/*
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* Main loop; this mostly deals with events on the vhost-user
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* socket itself, and not actual fuse data.
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*/
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int virtio_loop(struct fuse_session *se)
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{
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fuse_log(FUSE_LOG_INFO, "%s: Entry\n", __func__);
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while (1) {
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/* TODO: Add stuffing */
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while (!fuse_session_exited(se)) {
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struct pollfd pf[1];
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pf[0].fd = se->vu_socketfd;
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pf[0].events = POLLIN;
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pf[0].revents = 0;
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fuse_log(FUSE_LOG_DEBUG, "%s: Waiting for VU event\n", __func__);
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int poll_res = ppoll(pf, 1, NULL, NULL);
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if (poll_res == -1) {
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if (errno == EINTR) {
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fuse_log(FUSE_LOG_INFO, "%s: ppoll interrupted, going around\n",
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__func__);
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continue;
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}
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fuse_log(FUSE_LOG_ERR, "virtio_loop ppoll: %m\n");
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break;
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}
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assert(poll_res == 1);
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if (pf[0].revents & (POLLERR | POLLHUP | POLLNVAL)) {
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fuse_log(FUSE_LOG_ERR, "%s: Unexpected poll revents %x\n", __func__,
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pf[0].revents);
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break;
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}
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assert(pf[0].revents & POLLIN);
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fuse_log(FUSE_LOG_DEBUG, "%s: Got VU event\n", __func__);
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if (!vu_dispatch(&se->virtio_dev->dev)) {
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fuse_log(FUSE_LOG_ERR, "%s: vu_dispatch failed\n", __func__);
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break;
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}
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}
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fuse_log(FUSE_LOG_INFO, "%s: Exit\n", __func__);
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return 0;
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}
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int virtio_session_mount(struct fuse_session *se)
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