1 files changed, 0 insertions, 457 deletions

diff --git a/qemu/contrib/ivshmem-server/ivshmem-server.c b/qemu/contrib/ivshmem-server/ivshmem-server.c
deleted file mode 100644
index 172db78b3..000000000
--- a/qemu/contrib/ivshmem-server/ivshmem-server.c
+++ /dev/null
@@ -1,457 +0,0 @@
-/*
- * Copyright 6WIND S.A., 2014
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or
- * (at your option) any later version.  See the COPYING file in the
- * top-level directory.
- */
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "qemu/sockets.h"
-
-#include <sys/mman.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-
-#include "ivshmem-server.h"
-
-/* log a message on stdout if verbose=1 */
-#define IVSHMEM_SERVER_DEBUG(server, fmt, ...) do { \
-        if ((server)->verbose) {         \
-            printf(fmt, ## __VA_ARGS__); \
-        }                                \
-    } while (0)
-
-/** maximum size of a huge page, used by ivshmem_server_ftruncate() */
-#define IVSHMEM_SERVER_MAX_HUGEPAGE_SIZE (1024 * 1024 * 1024)
-
-/** default listen backlog (number of sockets not accepted) */
-#define IVSHMEM_SERVER_LISTEN_BACKLOG 10
-
-/* send message to a client unix socket */
-static int
-ivshmem_server_send_one_msg(int sock_fd, int64_t peer_id, int fd)
-{
-    int ret;
-    struct msghdr msg;
-    struct iovec iov[1];
-    union {
-        struct cmsghdr cmsg;
-        char control[CMSG_SPACE(sizeof(int))];
-    } msg_control;
-    struct cmsghdr *cmsg;
-
-    peer_id = GINT64_TO_LE(peer_id);
-    iov[0].iov_base = &peer_id;
-    iov[0].iov_len = sizeof(peer_id);
-
-    memset(&msg, 0, sizeof(msg));
-    msg.msg_iov = iov;
-    msg.msg_iovlen = 1;
-
-    /* if fd is specified, add it in a cmsg */
-    if (fd >= 0) {
-        memset(&msg_control, 0, sizeof(msg_control));
-        msg.msg_control = &msg_control;
-        msg.msg_controllen = sizeof(msg_control);
-        cmsg = CMSG_FIRSTHDR(&msg);
-        cmsg->cmsg_level = SOL_SOCKET;
-        cmsg->cmsg_type = SCM_RIGHTS;
-        cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-        memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
-    }
-
-    ret = sendmsg(sock_fd, &msg, 0);
-    if (ret <= 0) {
-        return -1;
-    }
-
-    return 0;
-}
-
-/* free a peer when the server advertises a disconnection or when the
- * server is freed */
-static void
-ivshmem_server_free_peer(IvshmemServer *server, IvshmemServerPeer *peer)
-{
-    unsigned vector;
-    IvshmemServerPeer *other_peer;
-
-    IVSHMEM_SERVER_DEBUG(server, "free peer %" PRId64 "\n", peer->id);
-    close(peer->sock_fd);
-    QTAILQ_REMOVE(&server->peer_list, peer, next);
-
-    /* advertise the deletion to other peers */
-    QTAILQ_FOREACH(other_peer, &server->peer_list, next) {
-        ivshmem_server_send_one_msg(other_peer->sock_fd, peer->id, -1);
-    }
-
-    for (vector = 0; vector < peer->vectors_count; vector++) {
-        event_notifier_cleanup(&peer->vectors[vector]);
-    }
-
-    g_free(peer);
-}
-
-/* send the peer id and the shm_fd just after a new client connection */
-static int
-ivshmem_server_send_initial_info(IvshmemServer *server, IvshmemServerPeer *peer)
-{
-    int ret;
-
-    /* send our protocol version first */
-    ret = ivshmem_server_send_one_msg(peer->sock_fd, IVSHMEM_PROTOCOL_VERSION,
-                                      -1);
-    if (ret < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot send version: %s\n",
-                             strerror(errno));
-        return -1;
-    }
-
-    /* send the peer id to the client */
-    ret = ivshmem_server_send_one_msg(peer->sock_fd, peer->id, -1);
-    if (ret < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot send peer id: %s\n",
-                             strerror(errno));
-        return -1;
-    }
-
-    /* send the shm_fd */
-    ret = ivshmem_server_send_one_msg(peer->sock_fd, -1, server->shm_fd);
-    if (ret < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot send shm fd: %s\n",
-                             strerror(errno));
-        return -1;
-    }
-
-    return 0;
-}
-
-/* handle message on listening unix socket (new client connection) */
-static int
-ivshmem_server_handle_new_conn(IvshmemServer *server)
-{
-    IvshmemServerPeer *peer, *other_peer;
-    struct sockaddr_un unaddr;
-    socklen_t unaddr_len;
-    int newfd;
-    unsigned i;
-
-    /* accept the incoming connection */
-    unaddr_len = sizeof(unaddr);
-    newfd = qemu_accept(server->sock_fd,
-                        (struct sockaddr *)&unaddr, &unaddr_len);
-
-    if (newfd < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot accept() %s\n", strerror(errno));
-        return -1;
-    }
-
-    qemu_set_nonblock(newfd);
-    IVSHMEM_SERVER_DEBUG(server, "accept()=%d\n", newfd);
-
-    /* allocate new structure for this peer */
-    peer = g_malloc0(sizeof(*peer));
-    peer->sock_fd = newfd;
-
-    /* get an unused peer id */
-    /* XXX: this could use id allocation such as Linux IDA, or simply
-     * a free-list */
-    for (i = 0; i < G_MAXUINT16; i++) {
-        if (ivshmem_server_search_peer(server, server->cur_id) == NULL) {
-            break;
-        }
-        server->cur_id++;
-    }
-    if (i == G_MAXUINT16) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot allocate new client id\n");
-        close(newfd);
-        g_free(peer);
-        return -1;
-    }
-    peer->id = server->cur_id++;
-
-    /* create eventfd, one per vector */
-    peer->vectors_count = server->n_vectors;
-    for (i = 0; i < peer->vectors_count; i++) {
-        if (event_notifier_init(&peer->vectors[i], FALSE) < 0) {
-            IVSHMEM_SERVER_DEBUG(server, "cannot create eventfd\n");
-            goto fail;
-        }
-    }
-
-    /* send peer id and shm fd */
-    if (ivshmem_server_send_initial_info(server, peer) < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot send initial info\n");
-        goto fail;
-    }
-
-    /* advertise the new peer to others */
-    QTAILQ_FOREACH(other_peer, &server->peer_list, next) {
-        for (i = 0; i < peer->vectors_count; i++) {
-            ivshmem_server_send_one_msg(other_peer->sock_fd, peer->id,
-                                        peer->vectors[i].wfd);
-        }
-    }
-
-    /* advertise the other peers to the new one */
-    QTAILQ_FOREACH(other_peer, &server->peer_list, next) {
-        for (i = 0; i < peer->vectors_count; i++) {
-            ivshmem_server_send_one_msg(peer->sock_fd, other_peer->id,
-                                        other_peer->vectors[i].wfd);
-        }
-    }
-
-    /* advertise the new peer to itself */
-    for (i = 0; i < peer->vectors_count; i++) {
-        ivshmem_server_send_one_msg(peer->sock_fd, peer->id,
-                                    event_notifier_get_fd(&peer->vectors[i]));
-    }
-
-    QTAILQ_INSERT_TAIL(&server->peer_list, peer, next);
-    IVSHMEM_SERVER_DEBUG(server, "new peer id = %" PRId64 "\n",
-                         peer->id);
-    return 0;
-
-fail:
-    while (i--) {
-        event_notifier_cleanup(&peer->vectors[i]);
-    }
-    close(newfd);
-    g_free(peer);
-    return -1;
-}
-
-/* Try to ftruncate a file to next power of 2 of shmsize.
- * If it fails; all power of 2 above shmsize are tested until
- * we reach the maximum huge page size. This is useful
- * if the shm file is in a hugetlbfs that cannot be truncated to the
- * shm_size value. */
-static int
-ivshmem_server_ftruncate(int fd, unsigned shmsize)
-{
-    int ret;
-    struct stat mapstat;
-
-    /* align shmsize to next power of 2 */
-    shmsize = pow2ceil(shmsize);
-
-    if (fstat(fd, &mapstat) != -1 && mapstat.st_size == shmsize) {
-        return 0;
-    }
-
-    while (shmsize <= IVSHMEM_SERVER_MAX_HUGEPAGE_SIZE) {
-        ret = ftruncate(fd, shmsize);
-        if (ret == 0) {
-            return ret;
-        }
-        shmsize *= 2;
-    }
-
-    return -1;
-}
-
-/* Init a new ivshmem server */
-int
-ivshmem_server_init(IvshmemServer *server, const char *unix_sock_path,
-                    const char *shm_path, bool use_shm_open,
-                    size_t shm_size, unsigned n_vectors,
-                    bool verbose)
-{
-    int ret;
-
-    memset(server, 0, sizeof(*server));
-    server->verbose = verbose;
-
-    ret = snprintf(server->unix_sock_path, sizeof(server->unix_sock_path),
-                   "%s", unix_sock_path);
-    if (ret < 0 || ret >= sizeof(server->unix_sock_path)) {
-        IVSHMEM_SERVER_DEBUG(server, "could not copy unix socket path\n");
-        return -1;
-    }
-    ret = snprintf(server->shm_path, sizeof(server->shm_path),
-                   "%s", shm_path);
-    if (ret < 0 || ret >= sizeof(server->shm_path)) {
-        IVSHMEM_SERVER_DEBUG(server, "could not copy shm path\n");
-        return -1;
-    }
-
-    server->use_shm_open = use_shm_open;
-    server->shm_size = shm_size;
-    server->n_vectors = n_vectors;
-
-    QTAILQ_INIT(&server->peer_list);
-
-    return 0;
-}
-
-/* open shm, create and bind to the unix socket */
-int
-ivshmem_server_start(IvshmemServer *server)
-{
-    struct sockaddr_un sun;
-    int shm_fd, sock_fd, ret;
-
-    /* open shm file */
-    if (server->use_shm_open) {
-        IVSHMEM_SERVER_DEBUG(server, "Using POSIX shared memory: %s\n",
-                             server->shm_path);
-        shm_fd = shm_open(server->shm_path, O_CREAT | O_RDWR, S_IRWXU);
-    } else {
-        gchar *filename = g_strdup_printf("%s/ivshmem.XXXXXX", server->shm_path);
-        IVSHMEM_SERVER_DEBUG(server, "Using file-backed shared memory: %s\n",
-                             server->shm_path);
-        shm_fd = mkstemp(filename);
-        unlink(filename);
-        g_free(filename);
-    }
-
-    if (shm_fd < 0) {
-        fprintf(stderr, "cannot open shm file %s: %s\n", server->shm_path,
-                strerror(errno));
-        return -1;
-    }
-    if (ivshmem_server_ftruncate(shm_fd, server->shm_size) < 0) {
-        fprintf(stderr, "ftruncate(%s) failed: %s\n", server->shm_path,
-                strerror(errno));
-        goto err_close_shm;
-    }
-
-    IVSHMEM_SERVER_DEBUG(server, "create & bind socket %s\n",
-                         server->unix_sock_path);
-
-    /* create the unix listening socket */
-    sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
-    if (sock_fd < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot create socket: %s\n",
-                             strerror(errno));
-        goto err_close_shm;
-    }
-
-    sun.sun_family = AF_UNIX;
-    ret = snprintf(sun.sun_path, sizeof(sun.sun_path), "%s",
-                   server->unix_sock_path);
-    if (ret < 0 || ret >= sizeof(sun.sun_path)) {
-        IVSHMEM_SERVER_DEBUG(server, "could not copy unix socket path\n");
-        goto err_close_sock;
-    }
-    if (bind(sock_fd, (struct sockaddr *)&sun, sizeof(sun)) < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "cannot connect to %s: %s\n", sun.sun_path,
-                             strerror(errno));
-        goto err_close_sock;
-    }
-
-    if (listen(sock_fd, IVSHMEM_SERVER_LISTEN_BACKLOG) < 0) {
-        IVSHMEM_SERVER_DEBUG(server, "listen() failed: %s\n", strerror(errno));
-        goto err_close_sock;
-    }
-
-    server->sock_fd = sock_fd;
-    server->shm_fd = shm_fd;
-
-    return 0;
-
-err_close_sock:
-    close(sock_fd);
-err_close_shm:
-    close(shm_fd);
-    return -1;
-}
-
-/* close connections to clients, the unix socket and the shm fd */
-void
-ivshmem_server_close(IvshmemServer *server)
-{
-    IvshmemServerPeer *peer, *npeer;
-
-    IVSHMEM_SERVER_DEBUG(server, "close server\n");
-
-    QTAILQ_FOREACH_SAFE(peer, &server->peer_list, next, npeer) {
-        ivshmem_server_free_peer(server, peer);
-    }
-
-    unlink(server->unix_sock_path);
-    close(server->sock_fd);
-    close(server->shm_fd);
-    server->sock_fd = -1;
-    server->shm_fd = -1;
-}
-
-/* get the fd_set according to the unix socket and the peer list */
-void
-ivshmem_server_get_fds(const IvshmemServer *server, fd_set *fds, int *maxfd)
-{
-    IvshmemServerPeer *peer;
-
-    if (server->sock_fd == -1) {
-        return;
-    }
-
-    FD_SET(server->sock_fd, fds);
-    if (server->sock_fd >= *maxfd) {
-        *maxfd = server->sock_fd + 1;
-    }
-
-    QTAILQ_FOREACH(peer, &server->peer_list, next) {
-        FD_SET(peer->sock_fd, fds);
-        if (peer->sock_fd >= *maxfd) {
-            *maxfd = peer->sock_fd + 1;
-        }
-    }
-}
-
-/* process incoming messages on the sockets in fd_set */
-int
-ivshmem_server_handle_fds(IvshmemServer *server, fd_set *fds, int maxfd)
-{
-    IvshmemServerPeer *peer, *peer_next;
-
-    if (server->sock_fd < maxfd && FD_ISSET(server->sock_fd, fds) &&
-        ivshmem_server_handle_new_conn(server) < 0 && errno != EINTR) {
-        IVSHMEM_SERVER_DEBUG(server, "ivshmem_server_handle_new_conn() "
-                             "failed\n");
-        return -1;
-    }
-
-    QTAILQ_FOREACH_SAFE(peer, &server->peer_list, next, peer_next) {
-        /* any message from a peer socket result in a close() */
-        IVSHMEM_SERVER_DEBUG(server, "peer->sock_fd=%d\n", peer->sock_fd);
-        if (peer->sock_fd < maxfd && FD_ISSET(peer->sock_fd, fds)) {
-            ivshmem_server_free_peer(server, peer);
-        }
-    }
-
-    return 0;
-}
-
-/* lookup peer from its id */
-IvshmemServerPeer *
-ivshmem_server_search_peer(IvshmemServer *server, int64_t peer_id)
-{
-    IvshmemServerPeer *peer;
-
-    QTAILQ_FOREACH(peer, &server->peer_list, next) {
-        if (peer->id == peer_id) {
-            return peer;
-        }
-    }
-    return NULL;
-}
-
-/* dump our info, the list of peers their vectors on stdout */
-void
-ivshmem_server_dump(const IvshmemServer *server)
-{
-    const IvshmemServerPeer *peer;
-    unsigned vector;
-
-    /* dump peers */
-    QTAILQ_FOREACH(peer, &server->peer_list, next) {
-        printf("peer_id = %" PRId64 "\n", peer->id);
-
-        for (vector = 0; vector < peer->vectors_count; vector++) {
-            printf("  vector %d is enabled (fd=%d)\n", vector,
-                   event_notifier_get_fd(&peer->vectors[vector]));
-        }
-    }
-}