diff options
Diffstat (limited to 'qemu/tests/vhost-user-bridge.c')
| -rw-r--r-- | qemu/tests/vhost-user-bridge.c | 1418 |
1 files changed, 0 insertions, 1418 deletions
diff --git a/qemu/tests/vhost-user-bridge.c b/qemu/tests/vhost-user-bridge.c deleted file mode 100644 index 0779ba260..000000000 --- a/qemu/tests/vhost-user-bridge.c +++ /dev/null @@ -1,1418 +0,0 @@ -/* - * Vhost User Bridge - * - * Copyright (c) 2015 Red Hat, Inc. - * - * Authors: - * Victor Kaplansky <victork@redhat.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or - * later. See the COPYING file in the top-level directory. - */ - -/* - * TODO: - * - main should get parameters from the command line. - * - implement all request handlers. Still not implemented: - * vubr_get_queue_num_exec() - * vubr_send_rarp_exec() - * - test for broken requests and virtqueue. - * - implement features defined by Virtio 1.0 spec. - * - support mergeable buffers and indirect descriptors. - * - implement clean shutdown. - * - implement non-blocking writes to UDP backend. - * - implement polling strategy. - * - implement clean starting/stopping of vq processing - * - implement clean starting/stopping of used and buffers - * dirty page logging. - */ - -#define _FILE_OFFSET_BITS 64 - -#include "qemu/osdep.h" -#include <sys/socket.h> -#include <sys/un.h> -#include <sys/unistd.h> -#include <sys/mman.h> -#include <sys/eventfd.h> -#include <arpa/inet.h> -#include <netdb.h> -#include <qemu/osdep.h> - -#include <linux/vhost.h> - -#include "qemu/atomic.h" -#include "standard-headers/linux/virtio_net.h" -#include "standard-headers/linux/virtio_ring.h" - -#define VHOST_USER_BRIDGE_DEBUG 1 - -#define DPRINT(...) \ - do { \ - if (VHOST_USER_BRIDGE_DEBUG) { \ - printf(__VA_ARGS__); \ - } \ - } while (0) - -typedef void (*CallbackFunc)(int sock, void *ctx); - -typedef struct Event { - void *ctx; - CallbackFunc callback; -} Event; - -typedef struct Dispatcher { - int max_sock; - fd_set fdset; - Event events[FD_SETSIZE]; -} Dispatcher; - -static void -vubr_die(const char *s) -{ - perror(s); - exit(1); -} - -static int -dispatcher_init(Dispatcher *dispr) -{ - FD_ZERO(&dispr->fdset); - dispr->max_sock = -1; - return 0; -} - -static int -dispatcher_add(Dispatcher *dispr, int sock, void *ctx, CallbackFunc cb) -{ - if (sock >= FD_SETSIZE) { - fprintf(stderr, - "Error: Failed to add new event. sock %d should be less than %d\n", - sock, FD_SETSIZE); - return -1; - } - - dispr->events[sock].ctx = ctx; - dispr->events[sock].callback = cb; - - FD_SET(sock, &dispr->fdset); - if (sock > dispr->max_sock) { - dispr->max_sock = sock; - } - DPRINT("Added sock %d for watching. max_sock: %d\n", - sock, dispr->max_sock); - return 0; -} - -/* dispatcher_remove() is not currently in use but may be useful - * in the future. */ -static int -dispatcher_remove(Dispatcher *dispr, int sock) -{ - if (sock >= FD_SETSIZE) { - fprintf(stderr, - "Error: Failed to remove event. sock %d should be less than %d\n", - sock, FD_SETSIZE); - return -1; - } - - FD_CLR(sock, &dispr->fdset); - DPRINT("Sock %d removed from dispatcher watch.\n", sock); - return 0; -} - -/* timeout in us */ -static int -dispatcher_wait(Dispatcher *dispr, uint32_t timeout) -{ - struct timeval tv; - tv.tv_sec = timeout / 1000000; - tv.tv_usec = timeout % 1000000; - - fd_set fdset = dispr->fdset; - - /* wait until some of sockets become readable. */ - int rc = select(dispr->max_sock + 1, &fdset, 0, 0, &tv); - - if (rc == -1) { - vubr_die("select"); - } - - /* Timeout */ - if (rc == 0) { - return 0; - } - - /* Now call callback for every ready socket. */ - - int sock; - for (sock = 0; sock < dispr->max_sock + 1; sock++) { - /* The callback on a socket can remove other sockets from the - * dispatcher, thus we have to check that the socket is - * still not removed from dispatcher's list - */ - if (FD_ISSET(sock, &fdset) && FD_ISSET(sock, &dispr->fdset)) { - Event *e = &dispr->events[sock]; - e->callback(sock, e->ctx); - } - } - - return 0; -} - -typedef struct VubrVirtq { - int call_fd; - int kick_fd; - uint32_t size; - uint16_t last_avail_index; - uint16_t last_used_index; - struct vring_desc *desc; - struct vring_avail *avail; - struct vring_used *used; - uint64_t log_guest_addr; - int enable; -} VubrVirtq; - -/* Based on qemu/hw/virtio/vhost-user.c */ - -#define VHOST_MEMORY_MAX_NREGIONS 8 -#define VHOST_USER_F_PROTOCOL_FEATURES 30 -/* v1.0 compliant. */ -#define VIRTIO_F_VERSION_1 32 - -#define VHOST_LOG_PAGE 4096 - -enum VhostUserProtocolFeature { - VHOST_USER_PROTOCOL_F_MQ = 0, - VHOST_USER_PROTOCOL_F_LOG_SHMFD = 1, - VHOST_USER_PROTOCOL_F_RARP = 2, - - VHOST_USER_PROTOCOL_F_MAX -}; - -#define VHOST_USER_PROTOCOL_FEATURE_MASK ((1 << VHOST_USER_PROTOCOL_F_MAX) - 1) - -typedef enum VhostUserRequest { - VHOST_USER_NONE = 0, - VHOST_USER_GET_FEATURES = 1, - VHOST_USER_SET_FEATURES = 2, - VHOST_USER_SET_OWNER = 3, - VHOST_USER_RESET_OWNER = 4, - VHOST_USER_SET_MEM_TABLE = 5, - VHOST_USER_SET_LOG_BASE = 6, - VHOST_USER_SET_LOG_FD = 7, - VHOST_USER_SET_VRING_NUM = 8, - VHOST_USER_SET_VRING_ADDR = 9, - VHOST_USER_SET_VRING_BASE = 10, - VHOST_USER_GET_VRING_BASE = 11, - VHOST_USER_SET_VRING_KICK = 12, - VHOST_USER_SET_VRING_CALL = 13, - VHOST_USER_SET_VRING_ERR = 14, - VHOST_USER_GET_PROTOCOL_FEATURES = 15, - VHOST_USER_SET_PROTOCOL_FEATURES = 16, - VHOST_USER_GET_QUEUE_NUM = 17, - VHOST_USER_SET_VRING_ENABLE = 18, - VHOST_USER_SEND_RARP = 19, - VHOST_USER_MAX -} VhostUserRequest; - -typedef struct VhostUserMemoryRegion { - uint64_t guest_phys_addr; - uint64_t memory_size; - uint64_t userspace_addr; - uint64_t mmap_offset; -} VhostUserMemoryRegion; - -typedef struct VhostUserMemory { - uint32_t nregions; - uint32_t padding; - VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS]; -} VhostUserMemory; - -typedef struct VhostUserLog { - uint64_t mmap_size; - uint64_t mmap_offset; -} VhostUserLog; - -typedef struct VhostUserMsg { - VhostUserRequest request; - -#define VHOST_USER_VERSION_MASK (0x3) -#define VHOST_USER_REPLY_MASK (0x1<<2) - uint32_t flags; - uint32_t size; /* the following payload size */ - union { -#define VHOST_USER_VRING_IDX_MASK (0xff) -#define VHOST_USER_VRING_NOFD_MASK (0x1<<8) - uint64_t u64; - struct vhost_vring_state state; - struct vhost_vring_addr addr; - VhostUserMemory memory; - VhostUserLog log; - } payload; - int fds[VHOST_MEMORY_MAX_NREGIONS]; - int fd_num; -} QEMU_PACKED VhostUserMsg; - -#define VHOST_USER_HDR_SIZE offsetof(VhostUserMsg, payload.u64) - -/* The version of the protocol we support */ -#define VHOST_USER_VERSION (0x1) - -#define MAX_NR_VIRTQUEUE (8) - -typedef struct VubrDevRegion { - /* Guest Physical address. */ - uint64_t gpa; - /* Memory region size. */ - uint64_t size; - /* QEMU virtual address (userspace). */ - uint64_t qva; - /* Starting offset in our mmaped space. */ - uint64_t mmap_offset; - /* Start address of mmaped space. */ - uint64_t mmap_addr; -} VubrDevRegion; - -typedef struct VubrDev { - int sock; - Dispatcher dispatcher; - uint32_t nregions; - VubrDevRegion regions[VHOST_MEMORY_MAX_NREGIONS]; - VubrVirtq vq[MAX_NR_VIRTQUEUE]; - int log_call_fd; - uint64_t log_size; - uint8_t *log_table; - int backend_udp_sock; - struct sockaddr_in backend_udp_dest; - int ready; - uint64_t features; - int hdrlen; -} VubrDev; - -static const char *vubr_request_str[] = { - [VHOST_USER_NONE] = "VHOST_USER_NONE", - [VHOST_USER_GET_FEATURES] = "VHOST_USER_GET_FEATURES", - [VHOST_USER_SET_FEATURES] = "VHOST_USER_SET_FEATURES", - [VHOST_USER_SET_OWNER] = "VHOST_USER_SET_OWNER", - [VHOST_USER_RESET_OWNER] = "VHOST_USER_RESET_OWNER", - [VHOST_USER_SET_MEM_TABLE] = "VHOST_USER_SET_MEM_TABLE", - [VHOST_USER_SET_LOG_BASE] = "VHOST_USER_SET_LOG_BASE", - [VHOST_USER_SET_LOG_FD] = "VHOST_USER_SET_LOG_FD", - [VHOST_USER_SET_VRING_NUM] = "VHOST_USER_SET_VRING_NUM", - [VHOST_USER_SET_VRING_ADDR] = "VHOST_USER_SET_VRING_ADDR", - [VHOST_USER_SET_VRING_BASE] = "VHOST_USER_SET_VRING_BASE", - [VHOST_USER_GET_VRING_BASE] = "VHOST_USER_GET_VRING_BASE", - [VHOST_USER_SET_VRING_KICK] = "VHOST_USER_SET_VRING_KICK", - [VHOST_USER_SET_VRING_CALL] = "VHOST_USER_SET_VRING_CALL", - [VHOST_USER_SET_VRING_ERR] = "VHOST_USER_SET_VRING_ERR", - [VHOST_USER_GET_PROTOCOL_FEATURES] = "VHOST_USER_GET_PROTOCOL_FEATURES", - [VHOST_USER_SET_PROTOCOL_FEATURES] = "VHOST_USER_SET_PROTOCOL_FEATURES", - [VHOST_USER_GET_QUEUE_NUM] = "VHOST_USER_GET_QUEUE_NUM", - [VHOST_USER_SET_VRING_ENABLE] = "VHOST_USER_SET_VRING_ENABLE", - [VHOST_USER_SEND_RARP] = "VHOST_USER_SEND_RARP", - [VHOST_USER_MAX] = "VHOST_USER_MAX", -}; - -static void -print_buffer(uint8_t *buf, size_t len) -{ - int i; - printf("Raw buffer:\n"); - for (i = 0; i < len; i++) { - if (i % 16 == 0) { - printf("\n"); - } - if (i % 4 == 0) { - printf(" "); - } - printf("%02x ", buf[i]); - } - printf("\n............................................................\n"); -} - -/* Translate guest physical address to our virtual address. */ -static uint64_t -gpa_to_va(VubrDev *dev, uint64_t guest_addr) -{ - int i; - - /* Find matching memory region. */ - for (i = 0; i < dev->nregions; i++) { - VubrDevRegion *r = &dev->regions[i]; - - if ((guest_addr >= r->gpa) && (guest_addr < (r->gpa + r->size))) { - return guest_addr - r->gpa + r->mmap_addr + r->mmap_offset; - } - } - - assert(!"address not found in regions"); - return 0; -} - -/* Translate qemu virtual address to our virtual address. */ -static uint64_t -qva_to_va(VubrDev *dev, uint64_t qemu_addr) -{ - int i; - - /* Find matching memory region. */ - for (i = 0; i < dev->nregions; i++) { - VubrDevRegion *r = &dev->regions[i]; - - if ((qemu_addr >= r->qva) && (qemu_addr < (r->qva + r->size))) { - return qemu_addr - r->qva + r->mmap_addr + r->mmap_offset; - } - } - - assert(!"address not found in regions"); - return 0; -} - -static void -vubr_message_read(int conn_fd, VhostUserMsg *vmsg) -{ - char control[CMSG_SPACE(VHOST_MEMORY_MAX_NREGIONS * sizeof(int))] = { }; - struct iovec iov = { - .iov_base = (char *)vmsg, - .iov_len = VHOST_USER_HDR_SIZE, - }; - struct msghdr msg = { - .msg_iov = &iov, - .msg_iovlen = 1, - .msg_control = control, - .msg_controllen = sizeof(control), - }; - size_t fd_size; - struct cmsghdr *cmsg; - int rc; - - rc = recvmsg(conn_fd, &msg, 0); - - if (rc == 0) { - vubr_die("recvmsg"); - fprintf(stderr, "Peer disconnected.\n"); - exit(1); - } - if (rc < 0) { - vubr_die("recvmsg"); - } - - vmsg->fd_num = 0; - for (cmsg = CMSG_FIRSTHDR(&msg); - cmsg != NULL; - cmsg = CMSG_NXTHDR(&msg, cmsg)) - { - if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { - fd_size = cmsg->cmsg_len - CMSG_LEN(0); - vmsg->fd_num = fd_size / sizeof(int); - memcpy(vmsg->fds, CMSG_DATA(cmsg), fd_size); - break; - } - } - - if (vmsg->size > sizeof(vmsg->payload)) { - fprintf(stderr, - "Error: too big message request: %d, size: vmsg->size: %u, " - "while sizeof(vmsg->payload) = %zu\n", - vmsg->request, vmsg->size, sizeof(vmsg->payload)); - exit(1); - } - - if (vmsg->size) { - rc = read(conn_fd, &vmsg->payload, vmsg->size); - if (rc == 0) { - vubr_die("recvmsg"); - fprintf(stderr, "Peer disconnected.\n"); - exit(1); - } - if (rc < 0) { - vubr_die("recvmsg"); - } - - assert(rc == vmsg->size); - } -} - -static void -vubr_message_write(int conn_fd, VhostUserMsg *vmsg) -{ - int rc; - - do { - rc = write(conn_fd, vmsg, VHOST_USER_HDR_SIZE + vmsg->size); - } while (rc < 0 && errno == EINTR); - - if (rc < 0) { - vubr_die("write"); - } -} - -static void -vubr_backend_udp_sendbuf(VubrDev *dev, uint8_t *buf, size_t len) -{ - int slen = sizeof(struct sockaddr_in); - - if (sendto(dev->backend_udp_sock, buf, len, 0, - (struct sockaddr *) &dev->backend_udp_dest, slen) == -1) { - vubr_die("sendto()"); - } -} - -static int -vubr_backend_udp_recvbuf(VubrDev *dev, uint8_t *buf, size_t buflen) -{ - int slen = sizeof(struct sockaddr_in); - int rc; - - rc = recvfrom(dev->backend_udp_sock, buf, buflen, 0, - (struct sockaddr *) &dev->backend_udp_dest, - (socklen_t *)&slen); - if (rc == -1) { - vubr_die("recvfrom()"); - } - - return rc; -} - -static void -vubr_consume_raw_packet(VubrDev *dev, uint8_t *buf, uint32_t len) -{ - int hdrlen = dev->hdrlen; - DPRINT(" hdrlen = %d\n", dev->hdrlen); - - if (VHOST_USER_BRIDGE_DEBUG) { - print_buffer(buf, len); - } - vubr_backend_udp_sendbuf(dev, buf + hdrlen, len - hdrlen); -} - -/* Kick the log_call_fd if required. */ -static void -vubr_log_kick(VubrDev *dev) -{ - if (dev->log_call_fd != -1) { - DPRINT("Kicking the QEMU's log...\n"); - eventfd_write(dev->log_call_fd, 1); - } -} - -/* Kick the guest if necessary. */ -static void -vubr_virtqueue_kick(VubrVirtq *vq) -{ - if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) { - DPRINT("Kicking the guest...\n"); - eventfd_write(vq->call_fd, 1); - } -} - -static void -vubr_log_page(uint8_t *log_table, uint64_t page) -{ - DPRINT("Logged dirty guest page: %"PRId64"\n", page); - atomic_or(&log_table[page / 8], 1 << (page % 8)); -} - -static void -vubr_log_write(VubrDev *dev, uint64_t address, uint64_t length) -{ - uint64_t page; - - if (!(dev->features & (1ULL << VHOST_F_LOG_ALL)) || - !dev->log_table || !length) { - return; - } - - assert(dev->log_size > ((address + length - 1) / VHOST_LOG_PAGE / 8)); - - page = address / VHOST_LOG_PAGE; - while (page * VHOST_LOG_PAGE < address + length) { - vubr_log_page(dev->log_table, page); - page += VHOST_LOG_PAGE; - } - vubr_log_kick(dev); -} - -static void -vubr_post_buffer(VubrDev *dev, VubrVirtq *vq, uint8_t *buf, int32_t len) -{ - struct vring_desc *desc = vq->desc; - struct vring_avail *avail = vq->avail; - struct vring_used *used = vq->used; - uint64_t log_guest_addr = vq->log_guest_addr; - int32_t remaining_len = len; - - unsigned int size = vq->size; - - uint16_t avail_index = atomic_mb_read(&avail->idx); - - /* We check the available descriptors before posting the - * buffer, so here we assume that enough available - * descriptors. */ - assert(vq->last_avail_index != avail_index); - uint16_t a_index = vq->last_avail_index % size; - uint16_t u_index = vq->last_used_index % size; - uint16_t d_index = avail->ring[a_index]; - - int i = d_index; - uint32_t written_len = 0; - - do { - DPRINT("Post packet to guest on vq:\n"); - DPRINT(" size = %d\n", vq->size); - DPRINT(" last_avail_index = %d\n", vq->last_avail_index); - DPRINT(" last_used_index = %d\n", vq->last_used_index); - DPRINT(" a_index = %d\n", a_index); - DPRINT(" u_index = %d\n", u_index); - DPRINT(" d_index = %d\n", d_index); - DPRINT(" desc[%d].addr = 0x%016"PRIx64"\n", i, desc[i].addr); - DPRINT(" desc[%d].len = %d\n", i, desc[i].len); - DPRINT(" desc[%d].flags = %d\n", i, desc[i].flags); - DPRINT(" avail->idx = %d\n", avail_index); - DPRINT(" used->idx = %d\n", used->idx); - - if (!(desc[i].flags & VRING_DESC_F_WRITE)) { - /* FIXME: we should find writable descriptor. */ - fprintf(stderr, "Error: descriptor is not writable. Exiting.\n"); - exit(1); - } - - void *chunk_start = (void *)(uintptr_t)gpa_to_va(dev, desc[i].addr); - uint32_t chunk_len = desc[i].len; - uint32_t chunk_write_len = MIN(remaining_len, chunk_len); - - memcpy(chunk_start, buf + written_len, chunk_write_len); - vubr_log_write(dev, desc[i].addr, chunk_write_len); - remaining_len -= chunk_write_len; - written_len += chunk_write_len; - - if ((remaining_len == 0) || !(desc[i].flags & VRING_DESC_F_NEXT)) { - break; - } - - i = desc[i].next; - } while (1); - - if (remaining_len > 0) { - fprintf(stderr, - "Too long packet for RX, remaining_len = %d, Dropping...\n", - remaining_len); - return; - } - - /* Add descriptor to the used ring. */ - used->ring[u_index].id = d_index; - used->ring[u_index].len = len; - vubr_log_write(dev, - log_guest_addr + offsetof(struct vring_used, ring[u_index]), - sizeof(used->ring[u_index])); - - vq->last_avail_index++; - vq->last_used_index++; - - atomic_mb_set(&used->idx, vq->last_used_index); - vubr_log_write(dev, - log_guest_addr + offsetof(struct vring_used, idx), - sizeof(used->idx)); - - /* Kick the guest if necessary. */ - vubr_virtqueue_kick(vq); -} - -static int -vubr_process_desc(VubrDev *dev, VubrVirtq *vq) -{ - struct vring_desc *desc = vq->desc; - struct vring_avail *avail = vq->avail; - struct vring_used *used = vq->used; - uint64_t log_guest_addr = vq->log_guest_addr; - - unsigned int size = vq->size; - - uint16_t a_index = vq->last_avail_index % size; - uint16_t u_index = vq->last_used_index % size; - uint16_t d_index = avail->ring[a_index]; - - uint32_t i, len = 0; - size_t buf_size = 4096; - uint8_t buf[4096]; - - DPRINT("Chunks: "); - i = d_index; - do { - void *chunk_start = (void *)(uintptr_t)gpa_to_va(dev, desc[i].addr); - uint32_t chunk_len = desc[i].len; - - assert(!(desc[i].flags & VRING_DESC_F_WRITE)); - - if (len + chunk_len < buf_size) { - memcpy(buf + len, chunk_start, chunk_len); - DPRINT("%d ", chunk_len); - } else { - fprintf(stderr, "Error: too long packet. Dropping...\n"); - break; - } - - len += chunk_len; - - if (!(desc[i].flags & VRING_DESC_F_NEXT)) { - break; - } - - i = desc[i].next; - } while (1); - DPRINT("\n"); - - if (!len) { - return -1; - } - - /* Add descriptor to the used ring. */ - used->ring[u_index].id = d_index; - used->ring[u_index].len = len; - vubr_log_write(dev, - log_guest_addr + offsetof(struct vring_used, ring[u_index]), - sizeof(used->ring[u_index])); - - vubr_consume_raw_packet(dev, buf, len); - - return 0; -} - -static void -vubr_process_avail(VubrDev *dev, VubrVirtq *vq) -{ - struct vring_avail *avail = vq->avail; - struct vring_used *used = vq->used; - uint64_t log_guest_addr = vq->log_guest_addr; - - while (vq->last_avail_index != atomic_mb_read(&avail->idx)) { - vubr_process_desc(dev, vq); - vq->last_avail_index++; - vq->last_used_index++; - } - - atomic_mb_set(&used->idx, vq->last_used_index); - vubr_log_write(dev, - log_guest_addr + offsetof(struct vring_used, idx), - sizeof(used->idx)); -} - -static void -vubr_backend_recv_cb(int sock, void *ctx) -{ - VubrDev *dev = (VubrDev *) ctx; - VubrVirtq *rx_vq = &dev->vq[0]; - uint8_t buf[4096]; - struct virtio_net_hdr_v1 *hdr = (struct virtio_net_hdr_v1 *)buf; - int hdrlen = dev->hdrlen; - int buflen = sizeof(buf); - int len; - - if (!dev->ready) { - return; - } - - DPRINT("\n\n *** IN UDP RECEIVE CALLBACK ***\n\n"); - DPRINT(" hdrlen = %d\n", hdrlen); - - uint16_t avail_index = atomic_mb_read(&rx_vq->avail->idx); - - /* If there is no available descriptors, just do nothing. - * The buffer will be handled by next arrived UDP packet, - * or next kick on receive virtq. */ - if (rx_vq->last_avail_index == avail_index) { - DPRINT("Got UDP packet, but no available descriptors on RX virtq.\n"); - return; - } - - memset(buf, 0, hdrlen); - /* TODO: support mergeable buffers. */ - if (hdrlen == 12) - hdr->num_buffers = 1; - len = vubr_backend_udp_recvbuf(dev, buf + hdrlen, buflen - hdrlen); - - vubr_post_buffer(dev, rx_vq, buf, len + hdrlen); -} - -static void -vubr_kick_cb(int sock, void *ctx) -{ - VubrDev *dev = (VubrDev *) ctx; - eventfd_t kick_data; - ssize_t rc; - - rc = eventfd_read(sock, &kick_data); - if (rc == -1) { - vubr_die("eventfd_read()"); - } else { - DPRINT("Got kick_data: %016"PRIx64"\n", kick_data); - vubr_process_avail(dev, &dev->vq[1]); - } -} - -static int -vubr_none_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - DPRINT("Function %s() not implemented yet.\n", __func__); - return 0; -} - -static int -vubr_get_features_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - vmsg->payload.u64 = - ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | - (1ULL << VHOST_F_LOG_ALL) | - (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | - (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)); - - vmsg->size = sizeof(vmsg->payload.u64); - - DPRINT("Sending back to guest u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - - /* Reply */ - return 1; -} - -static int -vubr_set_features_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - - dev->features = vmsg->payload.u64; - if ((dev->features & (1ULL << VIRTIO_F_VERSION_1)) || - (dev->features & (1ULL << VIRTIO_NET_F_MRG_RXBUF))) { - dev->hdrlen = 12; - } else { - dev->hdrlen = 10; - } - - return 0; -} - -static int -vubr_set_owner_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - return 0; -} - -static void -vubr_close_log(VubrDev *dev) -{ - if (dev->log_table) { - if (munmap(dev->log_table, dev->log_size) != 0) { - vubr_die("munmap()"); - } - - dev->log_table = 0; - } - if (dev->log_call_fd != -1) { - close(dev->log_call_fd); - dev->log_call_fd = -1; - } -} - -static int -vubr_reset_device_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - vubr_close_log(dev); - dev->ready = 0; - dev->features = 0; - return 0; -} - -static int -vubr_set_mem_table_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - int i; - VhostUserMemory *memory = &vmsg->payload.memory; - dev->nregions = memory->nregions; - - DPRINT("Nregions: %d\n", memory->nregions); - for (i = 0; i < dev->nregions; i++) { - void *mmap_addr; - VhostUserMemoryRegion *msg_region = &memory->regions[i]; - VubrDevRegion *dev_region = &dev->regions[i]; - - DPRINT("Region %d\n", i); - DPRINT(" guest_phys_addr: 0x%016"PRIx64"\n", - msg_region->guest_phys_addr); - DPRINT(" memory_size: 0x%016"PRIx64"\n", - msg_region->memory_size); - DPRINT(" userspace_addr 0x%016"PRIx64"\n", - msg_region->userspace_addr); - DPRINT(" mmap_offset 0x%016"PRIx64"\n", - msg_region->mmap_offset); - - dev_region->gpa = msg_region->guest_phys_addr; - dev_region->size = msg_region->memory_size; - dev_region->qva = msg_region->userspace_addr; - dev_region->mmap_offset = msg_region->mmap_offset; - - /* We don't use offset argument of mmap() since the - * mapped address has to be page aligned, and we use huge - * pages. */ - mmap_addr = mmap(0, dev_region->size + dev_region->mmap_offset, - PROT_READ | PROT_WRITE, MAP_SHARED, - vmsg->fds[i], 0); - - if (mmap_addr == MAP_FAILED) { - vubr_die("mmap"); - } - dev_region->mmap_addr = (uint64_t)(uintptr_t)mmap_addr; - DPRINT(" mmap_addr: 0x%016"PRIx64"\n", dev_region->mmap_addr); - - close(vmsg->fds[i]); - } - - return 0; -} - -static int -vubr_set_log_base_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - int fd; - uint64_t log_mmap_size, log_mmap_offset; - void *rc; - - assert(vmsg->fd_num == 1); - fd = vmsg->fds[0]; - - assert(vmsg->size == sizeof(vmsg->payload.log)); - log_mmap_offset = vmsg->payload.log.mmap_offset; - log_mmap_size = vmsg->payload.log.mmap_size; - DPRINT("Log mmap_offset: %"PRId64"\n", log_mmap_offset); - DPRINT("Log mmap_size: %"PRId64"\n", log_mmap_size); - - rc = mmap(0, log_mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, - log_mmap_offset); - if (rc == MAP_FAILED) { - vubr_die("mmap"); - } - dev->log_table = rc; - dev->log_size = log_mmap_size; - - vmsg->size = sizeof(vmsg->payload.u64); - /* Reply */ - return 1; -} - -static int -vubr_set_log_fd_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - assert(vmsg->fd_num == 1); - dev->log_call_fd = vmsg->fds[0]; - DPRINT("Got log_call_fd: %d\n", vmsg->fds[0]); - return 0; -} - -static int -vubr_set_vring_num_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - unsigned int index = vmsg->payload.state.index; - unsigned int num = vmsg->payload.state.num; - - DPRINT("State.index: %d\n", index); - DPRINT("State.num: %d\n", num); - dev->vq[index].size = num; - return 0; -} - -static int -vubr_set_vring_addr_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - struct vhost_vring_addr *vra = &vmsg->payload.addr; - unsigned int index = vra->index; - VubrVirtq *vq = &dev->vq[index]; - - DPRINT("vhost_vring_addr:\n"); - DPRINT(" index: %d\n", vra->index); - DPRINT(" flags: %d\n", vra->flags); - DPRINT(" desc_user_addr: 0x%016llx\n", vra->desc_user_addr); - DPRINT(" used_user_addr: 0x%016llx\n", vra->used_user_addr); - DPRINT(" avail_user_addr: 0x%016llx\n", vra->avail_user_addr); - DPRINT(" log_guest_addr: 0x%016llx\n", vra->log_guest_addr); - - vq->desc = (struct vring_desc *)(uintptr_t)qva_to_va(dev, vra->desc_user_addr); - vq->used = (struct vring_used *)(uintptr_t)qva_to_va(dev, vra->used_user_addr); - vq->avail = (struct vring_avail *)(uintptr_t)qva_to_va(dev, vra->avail_user_addr); - vq->log_guest_addr = vra->log_guest_addr; - - DPRINT("Setting virtq addresses:\n"); - DPRINT(" vring_desc at %p\n", vq->desc); - DPRINT(" vring_used at %p\n", vq->used); - DPRINT(" vring_avail at %p\n", vq->avail); - - vq->last_used_index = vq->used->idx; - return 0; -} - -static int -vubr_set_vring_base_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - unsigned int index = vmsg->payload.state.index; - unsigned int num = vmsg->payload.state.num; - - DPRINT("State.index: %d\n", index); - DPRINT("State.num: %d\n", num); - dev->vq[index].last_avail_index = num; - - return 0; -} - -static int -vubr_get_vring_base_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - unsigned int index = vmsg->payload.state.index; - - DPRINT("State.index: %d\n", index); - vmsg->payload.state.num = dev->vq[index].last_avail_index; - vmsg->size = sizeof(vmsg->payload.state); - /* FIXME: this is a work-around for a bug in QEMU enabling - * too early vrings. When protocol features are enabled, - * we have to respect * VHOST_USER_SET_VRING_ENABLE request. */ - dev->ready = 0; - - if (dev->vq[index].call_fd != -1) { - close(dev->vq[index].call_fd); - dispatcher_remove(&dev->dispatcher, dev->vq[index].call_fd); - dev->vq[index].call_fd = -1; - } - if (dev->vq[index].kick_fd != -1) { - close(dev->vq[index].kick_fd); - dispatcher_remove(&dev->dispatcher, dev->vq[index].kick_fd); - dev->vq[index].kick_fd = -1; - } - - /* Reply */ - return 1; -} - -static int -vubr_set_vring_kick_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - uint64_t u64_arg = vmsg->payload.u64; - int index = u64_arg & VHOST_USER_VRING_IDX_MASK; - - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - - assert((u64_arg & VHOST_USER_VRING_NOFD_MASK) == 0); - assert(vmsg->fd_num == 1); - - if (dev->vq[index].kick_fd != -1) { - close(dev->vq[index].kick_fd); - dispatcher_remove(&dev->dispatcher, dev->vq[index].kick_fd); - } - dev->vq[index].kick_fd = vmsg->fds[0]; - DPRINT("Got kick_fd: %d for vq: %d\n", vmsg->fds[0], index); - - if (index % 2 == 1) { - /* TX queue. */ - dispatcher_add(&dev->dispatcher, dev->vq[index].kick_fd, - dev, vubr_kick_cb); - - DPRINT("Waiting for kicks on fd: %d for vq: %d\n", - dev->vq[index].kick_fd, index); - } - /* We temporarily use this hack to determine that both TX and RX - * queues are set up and ready for processing. - * FIXME: we need to rely in VHOST_USER_SET_VRING_ENABLE and - * actual kicks. */ - if (dev->vq[0].kick_fd != -1 && - dev->vq[1].kick_fd != -1) { - dev->ready = 1; - DPRINT("vhost-user-bridge is ready for processing queues.\n"); - } - return 0; - -} - -static int -vubr_set_vring_call_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - uint64_t u64_arg = vmsg->payload.u64; - int index = u64_arg & VHOST_USER_VRING_IDX_MASK; - - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - assert((u64_arg & VHOST_USER_VRING_NOFD_MASK) == 0); - assert(vmsg->fd_num == 1); - - if (dev->vq[index].call_fd != -1) { - close(dev->vq[index].call_fd); - dispatcher_remove(&dev->dispatcher, dev->vq[index].call_fd); - } - dev->vq[index].call_fd = vmsg->fds[0]; - DPRINT("Got call_fd: %d for vq: %d\n", vmsg->fds[0], index); - - return 0; -} - -static int -vubr_set_vring_err_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - return 0; -} - -static int -vubr_get_protocol_features_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - vmsg->payload.u64 = 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD; - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - vmsg->size = sizeof(vmsg->payload.u64); - - /* Reply */ - return 1; -} - -static int -vubr_set_protocol_features_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - /* FIXME: unimplented */ - DPRINT("u64: 0x%016"PRIx64"\n", vmsg->payload.u64); - return 0; -} - -static int -vubr_get_queue_num_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - DPRINT("Function %s() not implemented yet.\n", __func__); - return 0; -} - -static int -vubr_set_vring_enable_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - unsigned int index = vmsg->payload.state.index; - unsigned int enable = vmsg->payload.state.num; - - DPRINT("State.index: %d\n", index); - DPRINT("State.enable: %d\n", enable); - dev->vq[index].enable = enable; - return 0; -} - -static int -vubr_send_rarp_exec(VubrDev *dev, VhostUserMsg *vmsg) -{ - DPRINT("Function %s() not implemented yet.\n", __func__); - return 0; -} - -static int -vubr_execute_request(VubrDev *dev, VhostUserMsg *vmsg) -{ - /* Print out generic part of the request. */ - DPRINT( - "================== Vhost user message from QEMU ==================\n"); - DPRINT("Request: %s (%d)\n", vubr_request_str[vmsg->request], - vmsg->request); - DPRINT("Flags: 0x%x\n", vmsg->flags); - DPRINT("Size: %d\n", vmsg->size); - - if (vmsg->fd_num) { - int i; - DPRINT("Fds:"); - for (i = 0; i < vmsg->fd_num; i++) { - DPRINT(" %d", vmsg->fds[i]); - } - DPRINT("\n"); - } - - switch (vmsg->request) { - case VHOST_USER_NONE: - return vubr_none_exec(dev, vmsg); - case VHOST_USER_GET_FEATURES: - return vubr_get_features_exec(dev, vmsg); - case VHOST_USER_SET_FEATURES: - return vubr_set_features_exec(dev, vmsg); - case VHOST_USER_SET_OWNER: - return vubr_set_owner_exec(dev, vmsg); - case VHOST_USER_RESET_OWNER: - return vubr_reset_device_exec(dev, vmsg); - case VHOST_USER_SET_MEM_TABLE: - return vubr_set_mem_table_exec(dev, vmsg); - case VHOST_USER_SET_LOG_BASE: - return vubr_set_log_base_exec(dev, vmsg); - case VHOST_USER_SET_LOG_FD: - return vubr_set_log_fd_exec(dev, vmsg); - case VHOST_USER_SET_VRING_NUM: - return vubr_set_vring_num_exec(dev, vmsg); - case VHOST_USER_SET_VRING_ADDR: - return vubr_set_vring_addr_exec(dev, vmsg); - case VHOST_USER_SET_VRING_BASE: - return vubr_set_vring_base_exec(dev, vmsg); - case VHOST_USER_GET_VRING_BASE: - return vubr_get_vring_base_exec(dev, vmsg); - case VHOST_USER_SET_VRING_KICK: - return vubr_set_vring_kick_exec(dev, vmsg); - case VHOST_USER_SET_VRING_CALL: - return vubr_set_vring_call_exec(dev, vmsg); - case VHOST_USER_SET_VRING_ERR: - return vubr_set_vring_err_exec(dev, vmsg); - case VHOST_USER_GET_PROTOCOL_FEATURES: - return vubr_get_protocol_features_exec(dev, vmsg); - case VHOST_USER_SET_PROTOCOL_FEATURES: - return vubr_set_protocol_features_exec(dev, vmsg); - case VHOST_USER_GET_QUEUE_NUM: - return vubr_get_queue_num_exec(dev, vmsg); - case VHOST_USER_SET_VRING_ENABLE: - return vubr_set_vring_enable_exec(dev, vmsg); - case VHOST_USER_SEND_RARP: - return vubr_send_rarp_exec(dev, vmsg); - - case VHOST_USER_MAX: - assert(vmsg->request != VHOST_USER_MAX); - } - return 0; -} - -static void -vubr_receive_cb(int sock, void *ctx) -{ - VubrDev *dev = (VubrDev *) ctx; - VhostUserMsg vmsg; - int reply_requested; - - vubr_message_read(sock, &vmsg); - reply_requested = vubr_execute_request(dev, &vmsg); - if (reply_requested) { - /* Set the version in the flags when sending the reply */ - vmsg.flags &= ~VHOST_USER_VERSION_MASK; - vmsg.flags |= VHOST_USER_VERSION; - vmsg.flags |= VHOST_USER_REPLY_MASK; - vubr_message_write(sock, &vmsg); - } -} - -static void -vubr_accept_cb(int sock, void *ctx) -{ - VubrDev *dev = (VubrDev *)ctx; - int conn_fd; - struct sockaddr_un un; - socklen_t len = sizeof(un); - - conn_fd = accept(sock, (struct sockaddr *) &un, &len); - if (conn_fd == -1) { - vubr_die("accept()"); - } - DPRINT("Got connection from remote peer on sock %d\n", conn_fd); - dispatcher_add(&dev->dispatcher, conn_fd, ctx, vubr_receive_cb); -} - -static VubrDev * -vubr_new(const char *path) -{ - VubrDev *dev = (VubrDev *) calloc(1, sizeof(VubrDev)); - dev->nregions = 0; - int i; - struct sockaddr_un un; - size_t len; - - for (i = 0; i < MAX_NR_VIRTQUEUE; i++) { - dev->vq[i] = (VubrVirtq) { - .call_fd = -1, .kick_fd = -1, - .size = 0, - .last_avail_index = 0, .last_used_index = 0, - .desc = 0, .avail = 0, .used = 0, - .enable = 0, - }; - } - - /* Init log */ - dev->log_call_fd = -1; - dev->log_size = 0; - dev->log_table = 0; - dev->ready = 0; - dev->features = 0; - - /* Get a UNIX socket. */ - dev->sock = socket(AF_UNIX, SOCK_STREAM, 0); - if (dev->sock == -1) { - vubr_die("socket"); - } - - un.sun_family = AF_UNIX; - strcpy(un.sun_path, path); - len = sizeof(un.sun_family) + strlen(path); - unlink(path); - - if (bind(dev->sock, (struct sockaddr *) &un, len) == -1) { - vubr_die("bind"); - } - - if (listen(dev->sock, 1) == -1) { - vubr_die("listen"); - } - - dispatcher_init(&dev->dispatcher); - dispatcher_add(&dev->dispatcher, dev->sock, (void *)dev, - vubr_accept_cb); - - DPRINT("Waiting for connections on UNIX socket %s ...\n", path); - return dev; -} - -static void -vubr_set_host(struct sockaddr_in *saddr, const char *host) -{ - if (isdigit(host[0])) { - if (!inet_aton(host, &saddr->sin_addr)) { - fprintf(stderr, "inet_aton() failed.\n"); - exit(1); - } - } else { - struct hostent *he = gethostbyname(host); - - if (!he) { - fprintf(stderr, "gethostbyname() failed.\n"); - exit(1); - } - saddr->sin_addr = *(struct in_addr *)he->h_addr; - } -} - -static void -vubr_backend_udp_setup(VubrDev *dev, - const char *local_host, - const char *local_port, - const char *remote_host, - const char *remote_port) -{ - int sock; - const char *r; - - int lport, rport; - - lport = strtol(local_port, (char **)&r, 0); - if (r == local_port) { - fprintf(stderr, "lport parsing failed.\n"); - exit(1); - } - - rport = strtol(remote_port, (char **)&r, 0); - if (r == remote_port) { - fprintf(stderr, "rport parsing failed.\n"); - exit(1); - } - - struct sockaddr_in si_local = { - .sin_family = AF_INET, - .sin_port = htons(lport), - }; - - vubr_set_host(&si_local, local_host); - - /* setup destination for sends */ - dev->backend_udp_dest = (struct sockaddr_in) { - .sin_family = AF_INET, - .sin_port = htons(rport), - }; - vubr_set_host(&dev->backend_udp_dest, remote_host); - - sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (sock == -1) { - vubr_die("socket"); - } - - if (bind(sock, (struct sockaddr *)&si_local, sizeof(si_local)) == -1) { - vubr_die("bind"); - } - - dev->backend_udp_sock = sock; - dispatcher_add(&dev->dispatcher, sock, dev, vubr_backend_recv_cb); - DPRINT("Waiting for data from udp backend on %s:%d...\n", - local_host, lport); -} - -static void -vubr_run(VubrDev *dev) -{ - while (1) { - /* timeout 200ms */ - dispatcher_wait(&dev->dispatcher, 200000); - /* Here one can try polling strategy. */ - } -} - -static int -vubr_parse_host_port(const char **host, const char **port, const char *buf) -{ - char *p = strchr(buf, ':'); - - if (!p) { - return -1; - } - *p = '\0'; - *host = strdup(buf); - *port = strdup(p + 1); - return 0; -} - -#define DEFAULT_UD_SOCKET "/tmp/vubr.sock" -#define DEFAULT_LHOST "127.0.0.1" -#define DEFAULT_LPORT "4444" -#define DEFAULT_RHOST "127.0.0.1" -#define DEFAULT_RPORT "5555" - -static const char *ud_socket_path = DEFAULT_UD_SOCKET; -static const char *lhost = DEFAULT_LHOST; -static const char *lport = DEFAULT_LPORT; -static const char *rhost = DEFAULT_RHOST; -static const char *rport = DEFAULT_RPORT; - -int -main(int argc, char *argv[]) -{ - VubrDev *dev; - int opt; - - while ((opt = getopt(argc, argv, "l:r:u:")) != -1) { - - switch (opt) { - case 'l': - if (vubr_parse_host_port(&lhost, &lport, optarg) < 0) { - goto out; - } - break; - case 'r': - if (vubr_parse_host_port(&rhost, &rport, optarg) < 0) { - goto out; - } - break; - case 'u': - ud_socket_path = strdup(optarg); - break; - default: - goto out; - } - } - - DPRINT("ud socket: %s\n", ud_socket_path); - DPRINT("local: %s:%s\n", lhost, lport); - DPRINT("remote: %s:%s\n", rhost, rport); - - dev = vubr_new(ud_socket_path); - if (!dev) { - return 1; - } - - vubr_backend_udp_setup(dev, lhost, lport, rhost, rport); - vubr_run(dev); - return 0; - -out: - fprintf(stderr, "Usage: %s ", argv[0]); - fprintf(stderr, "[-u ud_socket_path] [-l lhost:lport] [-r rhost:rport]\n"); - fprintf(stderr, "\t-u path to unix doman socket. default: %s\n", - DEFAULT_UD_SOCKET); - fprintf(stderr, "\t-l local host and port. default: %s:%s\n", - DEFAULT_LHOST, DEFAULT_LPORT); - fprintf(stderr, "\t-r remote host and port. default: %s:%s\n", - DEFAULT_RHOST, DEFAULT_RPORT); - - return 1; -} |