07718b4f87
This patch adapts vhost lib for selective datapath by calling device ops at the corresponding stage. Signed-off-by: Zhihong Wang <zhihong.wang@intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
1047 lines
24 KiB
C
1047 lines
24 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2016 Intel Corporation
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/queue.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <rte_log.h>
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#include "fd_man.h"
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#include "vhost.h"
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#include "vhost_user.h"
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TAILQ_HEAD(vhost_user_connection_list, vhost_user_connection);
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/*
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* Every time rte_vhost_driver_register() is invoked, an associated
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* vhost_user_socket struct will be created.
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*/
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struct vhost_user_socket {
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struct vhost_user_connection_list conn_list;
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pthread_mutex_t conn_mutex;
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char *path;
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int socket_fd;
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struct sockaddr_un un;
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bool is_server;
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bool reconnect;
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bool dequeue_zero_copy;
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bool iommu_support;
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bool use_builtin_virtio_net;
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/*
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* The "supported_features" indicates the feature bits the
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* vhost driver supports. The "features" indicates the feature
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* bits after the rte_vhost_driver_features_disable/enable().
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* It is also the final feature bits used for vhost-user
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* features negotiation.
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*/
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uint64_t supported_features;
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uint64_t features;
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/*
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* Device id to identify a specific backend device.
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* It's set to -1 for the default software implementation.
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* If valid, one socket can have 1 connection only.
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*/
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int vdpa_dev_id;
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struct vhost_device_ops const *notify_ops;
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};
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struct vhost_user_connection {
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struct vhost_user_socket *vsocket;
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int connfd;
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int vid;
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TAILQ_ENTRY(vhost_user_connection) next;
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};
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#define MAX_VHOST_SOCKET 1024
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struct vhost_user {
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struct vhost_user_socket *vsockets[MAX_VHOST_SOCKET];
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struct fdset fdset;
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int vsocket_cnt;
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pthread_mutex_t mutex;
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};
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#define MAX_VIRTIO_BACKLOG 128
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static void vhost_user_server_new_connection(int fd, void *data, int *remove);
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static void vhost_user_read_cb(int fd, void *dat, int *remove);
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static int create_unix_socket(struct vhost_user_socket *vsocket);
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static int vhost_user_start_client(struct vhost_user_socket *vsocket);
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static struct vhost_user vhost_user = {
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.fdset = {
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.fd = { [0 ... MAX_FDS - 1] = {-1, NULL, NULL, NULL, 0} },
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.fd_mutex = PTHREAD_MUTEX_INITIALIZER,
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.num = 0
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},
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.vsocket_cnt = 0,
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.mutex = PTHREAD_MUTEX_INITIALIZER,
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};
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/* return bytes# of read on success or negative val on failure. */
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int
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read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
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{
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struct iovec iov;
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struct msghdr msgh;
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size_t fdsize = fd_num * sizeof(int);
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char control[CMSG_SPACE(fdsize)];
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struct cmsghdr *cmsg;
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int got_fds = 0;
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int ret;
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memset(&msgh, 0, sizeof(msgh));
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iov.iov_base = buf;
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iov.iov_len = buflen;
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msgh.msg_iov = &iov;
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msgh.msg_iovlen = 1;
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msgh.msg_control = control;
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msgh.msg_controllen = sizeof(control);
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ret = recvmsg(sockfd, &msgh, 0);
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if (ret <= 0) {
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RTE_LOG(ERR, VHOST_CONFIG, "recvmsg failed\n");
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return ret;
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}
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if (msgh.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) {
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RTE_LOG(ERR, VHOST_CONFIG, "truncted msg\n");
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return -1;
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}
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for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
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cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
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if ((cmsg->cmsg_level == SOL_SOCKET) &&
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(cmsg->cmsg_type == SCM_RIGHTS)) {
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got_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
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memcpy(fds, CMSG_DATA(cmsg), got_fds * sizeof(int));
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break;
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}
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}
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/* Clear out unused file descriptors */
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while (got_fds < fd_num)
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fds[got_fds++] = -1;
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return ret;
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}
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int
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send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
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{
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struct iovec iov;
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struct msghdr msgh;
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size_t fdsize = fd_num * sizeof(int);
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char control[CMSG_SPACE(fdsize)];
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struct cmsghdr *cmsg;
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int ret;
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memset(&msgh, 0, sizeof(msgh));
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iov.iov_base = buf;
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iov.iov_len = buflen;
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msgh.msg_iov = &iov;
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msgh.msg_iovlen = 1;
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if (fds && fd_num > 0) {
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msgh.msg_control = control;
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msgh.msg_controllen = sizeof(control);
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cmsg = CMSG_FIRSTHDR(&msgh);
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if (cmsg == NULL) {
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RTE_LOG(ERR, VHOST_CONFIG, "cmsg == NULL\n");
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errno = EINVAL;
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return -1;
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}
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cmsg->cmsg_len = CMSG_LEN(fdsize);
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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memcpy(CMSG_DATA(cmsg), fds, fdsize);
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} else {
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msgh.msg_control = NULL;
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msgh.msg_controllen = 0;
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}
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do {
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ret = sendmsg(sockfd, &msgh, MSG_NOSIGNAL);
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} while (ret < 0 && errno == EINTR);
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG, "sendmsg error\n");
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return ret;
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}
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return ret;
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}
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static void
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vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
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{
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int vid;
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size_t size;
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struct vhost_user_connection *conn;
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int ret;
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conn = malloc(sizeof(*conn));
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if (conn == NULL) {
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close(fd);
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return;
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}
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vid = vhost_new_device();
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if (vid == -1) {
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goto err;
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}
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size = strnlen(vsocket->path, PATH_MAX);
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vhost_set_ifname(vid, vsocket->path, size);
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vhost_set_builtin_virtio_net(vid, vsocket->use_builtin_virtio_net);
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vhost_attach_vdpa_device(vid, vsocket->vdpa_dev_id);
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if (vsocket->dequeue_zero_copy)
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vhost_enable_dequeue_zero_copy(vid);
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RTE_LOG(INFO, VHOST_CONFIG, "new device, handle is %d\n", vid);
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if (vsocket->notify_ops->new_connection) {
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ret = vsocket->notify_ops->new_connection(vid);
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to add vhost user connection with fd %d\n",
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fd);
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goto err;
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}
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}
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conn->connfd = fd;
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conn->vsocket = vsocket;
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conn->vid = vid;
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ret = fdset_add(&vhost_user.fdset, fd, vhost_user_read_cb,
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NULL, conn);
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to add fd %d into vhost server fdset\n",
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fd);
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if (vsocket->notify_ops->destroy_connection)
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vsocket->notify_ops->destroy_connection(conn->vid);
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goto err;
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}
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pthread_mutex_lock(&vsocket->conn_mutex);
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TAILQ_INSERT_TAIL(&vsocket->conn_list, conn, next);
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pthread_mutex_unlock(&vsocket->conn_mutex);
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fdset_pipe_notify(&vhost_user.fdset);
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return;
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err:
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free(conn);
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close(fd);
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}
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/* call back when there is new vhost-user connection from client */
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static void
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vhost_user_server_new_connection(int fd, void *dat, int *remove __rte_unused)
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{
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struct vhost_user_socket *vsocket = dat;
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fd = accept(fd, NULL, NULL);
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if (fd < 0)
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return;
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RTE_LOG(INFO, VHOST_CONFIG, "new vhost user connection is %d\n", fd);
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vhost_user_add_connection(fd, vsocket);
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}
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static void
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vhost_user_read_cb(int connfd, void *dat, int *remove)
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{
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struct vhost_user_connection *conn = dat;
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struct vhost_user_socket *vsocket = conn->vsocket;
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int ret;
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ret = vhost_user_msg_handler(conn->vid, connfd);
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if (ret < 0) {
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close(connfd);
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*remove = 1;
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vhost_destroy_device(conn->vid);
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if (vsocket->notify_ops->destroy_connection)
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vsocket->notify_ops->destroy_connection(conn->vid);
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pthread_mutex_lock(&vsocket->conn_mutex);
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TAILQ_REMOVE(&vsocket->conn_list, conn, next);
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pthread_mutex_unlock(&vsocket->conn_mutex);
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free(conn);
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if (vsocket->reconnect) {
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create_unix_socket(vsocket);
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vhost_user_start_client(vsocket);
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}
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}
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}
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static int
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create_unix_socket(struct vhost_user_socket *vsocket)
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{
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int fd;
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struct sockaddr_un *un = &vsocket->un;
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0)
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return -1;
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RTE_LOG(INFO, VHOST_CONFIG, "vhost-user %s: socket created, fd: %d\n",
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vsocket->is_server ? "server" : "client", fd);
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if (!vsocket->is_server && fcntl(fd, F_SETFL, O_NONBLOCK)) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"vhost-user: can't set nonblocking mode for socket, fd: "
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"%d (%s)\n", fd, strerror(errno));
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close(fd);
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return -1;
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}
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memset(un, 0, sizeof(*un));
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un->sun_family = AF_UNIX;
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strncpy(un->sun_path, vsocket->path, sizeof(un->sun_path));
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un->sun_path[sizeof(un->sun_path) - 1] = '\0';
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vsocket->socket_fd = fd;
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return 0;
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}
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static int
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vhost_user_start_server(struct vhost_user_socket *vsocket)
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{
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int ret;
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int fd = vsocket->socket_fd;
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const char *path = vsocket->path;
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/*
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* bind () may fail if the socket file with the same name already
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* exists. But the library obviously should not delete the file
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* provided by the user, since we can not be sure that it is not
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* being used by other applications. Moreover, many applications form
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* socket names based on user input, which is prone to errors.
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*
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* The user must ensure that the socket does not exist before
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* registering the vhost driver in server mode.
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*/
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ret = bind(fd, (struct sockaddr *)&vsocket->un, sizeof(vsocket->un));
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to bind to %s: %s; remove it and try again\n",
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path, strerror(errno));
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goto err;
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}
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RTE_LOG(INFO, VHOST_CONFIG, "bind to %s\n", path);
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ret = listen(fd, MAX_VIRTIO_BACKLOG);
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if (ret < 0)
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goto err;
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ret = fdset_add(&vhost_user.fdset, fd, vhost_user_server_new_connection,
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NULL, vsocket);
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to add listen fd %d to vhost server fdset\n",
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fd);
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goto err;
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}
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return 0;
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err:
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close(fd);
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return -1;
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}
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struct vhost_user_reconnect {
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struct sockaddr_un un;
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int fd;
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struct vhost_user_socket *vsocket;
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TAILQ_ENTRY(vhost_user_reconnect) next;
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};
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TAILQ_HEAD(vhost_user_reconnect_tailq_list, vhost_user_reconnect);
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struct vhost_user_reconnect_list {
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struct vhost_user_reconnect_tailq_list head;
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pthread_mutex_t mutex;
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};
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static struct vhost_user_reconnect_list reconn_list;
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static pthread_t reconn_tid;
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static int
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vhost_user_connect_nonblock(int fd, struct sockaddr *un, size_t sz)
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{
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int ret, flags;
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ret = connect(fd, un, sz);
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if (ret < 0 && errno != EISCONN)
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return -1;
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flags = fcntl(fd, F_GETFL, 0);
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if (flags < 0) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"can't get flags for connfd %d\n", fd);
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return -2;
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}
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if ((flags & O_NONBLOCK) && fcntl(fd, F_SETFL, flags & ~O_NONBLOCK)) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"can't disable nonblocking on fd %d\n", fd);
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return -2;
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}
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return 0;
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}
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static void *
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vhost_user_client_reconnect(void *arg __rte_unused)
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{
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int ret;
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struct vhost_user_reconnect *reconn, *next;
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while (1) {
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pthread_mutex_lock(&reconn_list.mutex);
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/*
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* An equal implementation of TAILQ_FOREACH_SAFE,
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* which does not exist on all platforms.
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*/
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for (reconn = TAILQ_FIRST(&reconn_list.head);
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reconn != NULL; reconn = next) {
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next = TAILQ_NEXT(reconn, next);
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ret = vhost_user_connect_nonblock(reconn->fd,
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(struct sockaddr *)&reconn->un,
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sizeof(reconn->un));
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if (ret == -2) {
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close(reconn->fd);
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RTE_LOG(ERR, VHOST_CONFIG,
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"reconnection for fd %d failed\n",
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reconn->fd);
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goto remove_fd;
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}
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if (ret == -1)
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continue;
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RTE_LOG(INFO, VHOST_CONFIG,
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"%s: connected\n", reconn->vsocket->path);
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vhost_user_add_connection(reconn->fd, reconn->vsocket);
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remove_fd:
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TAILQ_REMOVE(&reconn_list.head, reconn, next);
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free(reconn);
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}
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pthread_mutex_unlock(&reconn_list.mutex);
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sleep(1);
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}
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return NULL;
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}
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|
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static int
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vhost_user_reconnect_init(void)
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{
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int ret;
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char thread_name[RTE_MAX_THREAD_NAME_LEN];
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ret = pthread_mutex_init(&reconn_list.mutex, NULL);
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if (ret < 0) {
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RTE_LOG(ERR, VHOST_CONFIG, "failed to initialize mutex");
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return ret;
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}
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TAILQ_INIT(&reconn_list.head);
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ret = pthread_create(&reconn_tid, NULL,
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vhost_user_client_reconnect, NULL);
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if (ret != 0) {
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RTE_LOG(ERR, VHOST_CONFIG, "failed to create reconnect thread");
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if (pthread_mutex_destroy(&reconn_list.mutex)) {
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RTE_LOG(ERR, VHOST_CONFIG,
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"failed to destroy reconnect mutex");
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}
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} else {
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snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
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"vhost-reconn");
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if (rte_thread_setname(reconn_tid, thread_name)) {
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RTE_LOG(DEBUG, VHOST_CONFIG,
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"failed to set reconnect thread name");
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}
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}
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return ret;
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}
|
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|
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static int
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vhost_user_start_client(struct vhost_user_socket *vsocket)
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{
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int ret;
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int fd = vsocket->socket_fd;
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const char *path = vsocket->path;
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struct vhost_user_reconnect *reconn;
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ret = vhost_user_connect_nonblock(fd, (struct sockaddr *)&vsocket->un,
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sizeof(vsocket->un));
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if (ret == 0) {
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vhost_user_add_connection(fd, vsocket);
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return 0;
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}
|
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|
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RTE_LOG(WARNING, VHOST_CONFIG,
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"failed to connect to %s: %s\n",
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path, strerror(errno));
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|
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if (ret == -2 || !vsocket->reconnect) {
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close(fd);
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return -1;
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}
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|
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RTE_LOG(INFO, VHOST_CONFIG, "%s: reconnecting...\n", path);
|
|
reconn = malloc(sizeof(*reconn));
|
|
if (reconn == NULL) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to allocate memory for reconnect\n");
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
reconn->un = vsocket->un;
|
|
reconn->fd = fd;
|
|
reconn->vsocket = vsocket;
|
|
pthread_mutex_lock(&reconn_list.mutex);
|
|
TAILQ_INSERT_TAIL(&reconn_list.head, reconn, next);
|
|
pthread_mutex_unlock(&reconn_list.mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct vhost_user_socket *
|
|
find_vhost_user_socket(const char *path)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < vhost_user.vsocket_cnt; i++) {
|
|
struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
|
|
|
|
if (!strcmp(vsocket->path, path))
|
|
return vsocket;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_attach_vdpa_device(const char *path, int did)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
if (rte_vdpa_get_device(did) == NULL)
|
|
return -1;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket)
|
|
vsocket->vdpa_dev_id = did;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_detach_vdpa_device(const char *path)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket)
|
|
vsocket->vdpa_dev_id = -1;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_get_vdpa_device_id(const char *path)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
int did = -1;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket)
|
|
did = vsocket->vdpa_dev_id;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return did;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_disable_features(const char *path, uint64_t features)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
|
|
/* Note that use_builtin_virtio_net is not affected by this function
|
|
* since callers may want to selectively disable features of the
|
|
* built-in vhost net device backend.
|
|
*/
|
|
|
|
if (vsocket)
|
|
vsocket->features &= ~features;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_enable_features(const char *path, uint64_t features)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket) {
|
|
if ((vsocket->supported_features & features) != features) {
|
|
/*
|
|
* trying to enable features the driver doesn't
|
|
* support.
|
|
*/
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
return -1;
|
|
}
|
|
vsocket->features |= features;
|
|
}
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_set_features(const char *path, uint64_t features)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket) {
|
|
vsocket->supported_features = features;
|
|
vsocket->features = features;
|
|
|
|
/* Anyone setting feature bits is implementing their own vhost
|
|
* device backend.
|
|
*/
|
|
vsocket->use_builtin_virtio_net = false;
|
|
}
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_get_features(const char *path, uint64_t *features)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
uint64_t vdpa_features;
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
int ret = 0;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (!vsocket) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"socket file %s is not registered yet.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
did = vsocket->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (!vdpa_dev || !vdpa_dev->ops->get_features) {
|
|
*features = vsocket->features;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
if (vdpa_dev->ops->get_features(did, &vdpa_features) < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to get vdpa features "
|
|
"for socket file %s.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
*features = vsocket->features & vdpa_features;
|
|
|
|
unlock_exit:
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_get_protocol_features(const char *path,
|
|
uint64_t *protocol_features)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
uint64_t vdpa_protocol_features;
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
int ret = 0;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (!vsocket) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"socket file %s is not registered yet.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
did = vsocket->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (!vdpa_dev || !vdpa_dev->ops->get_protocol_features) {
|
|
*protocol_features = VHOST_USER_PROTOCOL_FEATURES;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
if (vdpa_dev->ops->get_protocol_features(did,
|
|
&vdpa_protocol_features) < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to get vdpa protocol features "
|
|
"for socket file %s.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
*protocol_features = VHOST_USER_PROTOCOL_FEATURES
|
|
& vdpa_protocol_features;
|
|
|
|
unlock_exit:
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_get_queue_num(const char *path, uint32_t *queue_num)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
uint32_t vdpa_queue_num;
|
|
struct rte_vdpa_device *vdpa_dev;
|
|
int did = -1;
|
|
int ret = 0;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (!vsocket) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"socket file %s is not registered yet.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
did = vsocket->vdpa_dev_id;
|
|
vdpa_dev = rte_vdpa_get_device(did);
|
|
if (!vdpa_dev || !vdpa_dev->ops->get_queue_num) {
|
|
*queue_num = VHOST_MAX_QUEUE_PAIRS;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
if (vdpa_dev->ops->get_queue_num(did, &vdpa_queue_num) < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to get vdpa queue number "
|
|
"for socket file %s.\n", path);
|
|
ret = -1;
|
|
goto unlock_exit;
|
|
}
|
|
|
|
*queue_num = RTE_MIN((uint32_t)VHOST_MAX_QUEUE_PAIRS, vdpa_queue_num);
|
|
|
|
unlock_exit:
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Register a new vhost-user socket; here we could act as server
|
|
* (the default case), or client (when RTE_VHOST_USER_CLIENT) flag
|
|
* is set.
|
|
*/
|
|
int
|
|
rte_vhost_driver_register(const char *path, uint64_t flags)
|
|
{
|
|
int ret = -1;
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
if (!path)
|
|
return -1;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
|
|
if (vhost_user.vsocket_cnt == MAX_VHOST_SOCKET) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"error: the number of vhost sockets reaches maximum\n");
|
|
goto out;
|
|
}
|
|
|
|
vsocket = malloc(sizeof(struct vhost_user_socket));
|
|
if (!vsocket)
|
|
goto out;
|
|
memset(vsocket, 0, sizeof(struct vhost_user_socket));
|
|
vsocket->path = strdup(path);
|
|
if (vsocket->path == NULL) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"error: failed to copy socket path string\n");
|
|
free(vsocket);
|
|
goto out;
|
|
}
|
|
TAILQ_INIT(&vsocket->conn_list);
|
|
ret = pthread_mutex_init(&vsocket->conn_mutex, NULL);
|
|
if (ret) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"error: failed to init connection mutex\n");
|
|
goto out_free;
|
|
}
|
|
vsocket->dequeue_zero_copy = flags & RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
|
|
|
|
/*
|
|
* Set the supported features correctly for the builtin vhost-user
|
|
* net driver.
|
|
*
|
|
* Applications know nothing about features the builtin virtio net
|
|
* driver (virtio_net.c) supports, thus it's not possible for them
|
|
* to invoke rte_vhost_driver_set_features(). To workaround it, here
|
|
* we set it unconditionally. If the application want to implement
|
|
* another vhost-user driver (say SCSI), it should call the
|
|
* rte_vhost_driver_set_features(), which will overwrite following
|
|
* two values.
|
|
*/
|
|
vsocket->use_builtin_virtio_net = true;
|
|
vsocket->supported_features = VIRTIO_NET_SUPPORTED_FEATURES;
|
|
vsocket->features = VIRTIO_NET_SUPPORTED_FEATURES;
|
|
|
|
if (!(flags & RTE_VHOST_USER_IOMMU_SUPPORT)) {
|
|
vsocket->supported_features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
|
|
vsocket->features &= ~(1ULL << VIRTIO_F_IOMMU_PLATFORM);
|
|
}
|
|
|
|
if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
|
|
vsocket->reconnect = !(flags & RTE_VHOST_USER_NO_RECONNECT);
|
|
if (vsocket->reconnect && reconn_tid == 0) {
|
|
if (vhost_user_reconnect_init() != 0)
|
|
goto out_mutex;
|
|
}
|
|
} else {
|
|
vsocket->is_server = true;
|
|
}
|
|
ret = create_unix_socket(vsocket);
|
|
if (ret < 0) {
|
|
goto out_mutex;
|
|
}
|
|
|
|
vhost_user.vsockets[vhost_user.vsocket_cnt++] = vsocket;
|
|
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
return ret;
|
|
|
|
out_mutex:
|
|
if (pthread_mutex_destroy(&vsocket->conn_mutex)) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"error: failed to destroy connection mutex\n");
|
|
}
|
|
out_free:
|
|
free(vsocket->path);
|
|
free(vsocket);
|
|
out:
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool
|
|
vhost_user_remove_reconnect(struct vhost_user_socket *vsocket)
|
|
{
|
|
int found = false;
|
|
struct vhost_user_reconnect *reconn, *next;
|
|
|
|
pthread_mutex_lock(&reconn_list.mutex);
|
|
|
|
for (reconn = TAILQ_FIRST(&reconn_list.head);
|
|
reconn != NULL; reconn = next) {
|
|
next = TAILQ_NEXT(reconn, next);
|
|
|
|
if (reconn->vsocket == vsocket) {
|
|
TAILQ_REMOVE(&reconn_list.head, reconn, next);
|
|
close(reconn->fd);
|
|
free(reconn);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&reconn_list.mutex);
|
|
return found;
|
|
}
|
|
|
|
/**
|
|
* Unregister the specified vhost socket
|
|
*/
|
|
int
|
|
rte_vhost_driver_unregister(const char *path)
|
|
{
|
|
int i;
|
|
int count;
|
|
struct vhost_user_connection *conn, *next;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
|
|
for (i = 0; i < vhost_user.vsocket_cnt; i++) {
|
|
struct vhost_user_socket *vsocket = vhost_user.vsockets[i];
|
|
|
|
if (!strcmp(vsocket->path, path)) {
|
|
if (vsocket->is_server) {
|
|
fdset_del(&vhost_user.fdset, vsocket->socket_fd);
|
|
close(vsocket->socket_fd);
|
|
unlink(path);
|
|
} else if (vsocket->reconnect) {
|
|
vhost_user_remove_reconnect(vsocket);
|
|
}
|
|
|
|
pthread_mutex_lock(&vsocket->conn_mutex);
|
|
for (conn = TAILQ_FIRST(&vsocket->conn_list);
|
|
conn != NULL;
|
|
conn = next) {
|
|
next = TAILQ_NEXT(conn, next);
|
|
|
|
fdset_del(&vhost_user.fdset, conn->connfd);
|
|
RTE_LOG(INFO, VHOST_CONFIG,
|
|
"free connfd = %d for device '%s'\n",
|
|
conn->connfd, path);
|
|
close(conn->connfd);
|
|
vhost_destroy_device(conn->vid);
|
|
TAILQ_REMOVE(&vsocket->conn_list, conn, next);
|
|
free(conn);
|
|
}
|
|
pthread_mutex_unlock(&vsocket->conn_mutex);
|
|
|
|
pthread_mutex_destroy(&vsocket->conn_mutex);
|
|
free(vsocket->path);
|
|
free(vsocket);
|
|
|
|
count = --vhost_user.vsocket_cnt;
|
|
vhost_user.vsockets[i] = vhost_user.vsockets[count];
|
|
vhost_user.vsockets[count] = NULL;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Register ops so that we can add/remove device to data core.
|
|
*/
|
|
int
|
|
rte_vhost_driver_callback_register(const char *path,
|
|
struct vhost_device_ops const * const ops)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
if (vsocket)
|
|
vsocket->notify_ops = ops;
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? 0 : -1;
|
|
}
|
|
|
|
struct vhost_device_ops const *
|
|
vhost_driver_callback_get(const char *path)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
return vsocket ? vsocket->notify_ops : NULL;
|
|
}
|
|
|
|
int
|
|
rte_vhost_driver_start(const char *path)
|
|
{
|
|
struct vhost_user_socket *vsocket;
|
|
static pthread_t fdset_tid;
|
|
char thread_name[RTE_MAX_THREAD_NAME_LEN];
|
|
|
|
pthread_mutex_lock(&vhost_user.mutex);
|
|
vsocket = find_vhost_user_socket(path);
|
|
pthread_mutex_unlock(&vhost_user.mutex);
|
|
|
|
if (!vsocket)
|
|
return -1;
|
|
|
|
if (fdset_tid == 0) {
|
|
/**
|
|
* create a pipe which will be waited by poll and notified to
|
|
* rebuild the wait list of poll.
|
|
*/
|
|
if (fdset_pipe_init(&vhost_user.fdset) < 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to create pipe for vhost fdset\n");
|
|
return -1;
|
|
}
|
|
|
|
int ret = pthread_create(&fdset_tid, NULL, fdset_event_dispatch,
|
|
&vhost_user.fdset);
|
|
if (ret != 0) {
|
|
RTE_LOG(ERR, VHOST_CONFIG,
|
|
"failed to create fdset handling thread");
|
|
|
|
fdset_pipe_uninit(&vhost_user.fdset);
|
|
return -1;
|
|
} else {
|
|
snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN,
|
|
"vhost-events");
|
|
|
|
if (rte_thread_setname(fdset_tid, thread_name)) {
|
|
RTE_LOG(DEBUG, VHOST_CONFIG,
|
|
"failed to set vhost-event thread name");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (vsocket->is_server)
|
|
return vhost_user_start_server(vsocket);
|
|
else
|
|
return vhost_user_start_client(vsocket);
|
|
}
|