diff options
Diffstat (limited to 'util/qemu-sockets.c')
| -rw-r--r-- | util/qemu-sockets.c | 205 |
1 files changed, 23 insertions, 182 deletions
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c index 1358c81bcc..d149383bb9 100644 --- a/util/qemu-sockets.c +++ b/util/qemu-sockets.c @@ -300,88 +300,19 @@ listen: ((rc) == -EINPROGRESS) #endif -/* Struct to store connect state for non blocking connect */ -typedef struct ConnectState { - int fd; - struct addrinfo *addr_list; - struct addrinfo *current_addr; - NonBlockingConnectHandler *callback; - void *opaque; -} ConnectState; - -static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, - ConnectState *connect_state, Error **errp); +static int inet_connect_addr(struct addrinfo *addr, Error **errp); -static void wait_for_connect(void *opaque) -{ - ConnectState *s = opaque; - int val = 0, rc = 0; - socklen_t valsize = sizeof(val); - bool in_progress; - Error *err = NULL; - - qemu_set_fd_handler(s->fd, NULL, NULL, NULL); - - do { - rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize); - } while (rc == -1 && errno == EINTR); - - /* update rc to contain error */ - if (!rc && val) { - rc = -1; - errno = val; - } - - /* connect error */ - if (rc < 0) { - error_setg_errno(&err, errno, "Error connecting to socket"); - closesocket(s->fd); - s->fd = rc; - } - - /* try to connect to the next address on the list */ - if (s->current_addr) { - while (s->current_addr->ai_next != NULL && s->fd < 0) { - s->current_addr = s->current_addr->ai_next; - s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL); - if (s->fd < 0) { - error_free(err); - err = NULL; - error_setg_errno(&err, errno, "Unable to start socket connect"); - } - /* connect in progress */ - if (in_progress) { - goto out; - } - } - - freeaddrinfo(s->addr_list); - } - - if (s->callback) { - s->callback(s->fd, err, s->opaque); - } - g_free(s); -out: - error_free(err); -} - -static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, - ConnectState *connect_state, Error **errp) +static int inet_connect_addr(struct addrinfo *addr, Error **errp) { int sock, rc; - *in_progress = false; - sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); if (sock < 0) { error_setg_errno(errp, errno, "Failed to create socket"); return -1; } socket_set_fast_reuse(sock); - if (connect_state != NULL) { - qemu_set_nonblock(sock); - } + /* connect to peer */ do { rc = 0; @@ -390,15 +321,12 @@ static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, } } while (rc == -EINTR); - if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { - connect_state->fd = sock; - qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state); - *in_progress = true; - } else if (rc < 0) { + if (rc < 0) { error_setg_errno(errp, errno, "Failed to connect socket"); closesocket(sock); return -1; } + return sock; } @@ -456,44 +384,24 @@ static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr, * * @saddr: Inet socket address specification * @errp: set on error - * @callback: callback function for non-blocking connect - * @opaque: opaque for callback function * * Returns: -1 on error, file descriptor on success. - * - * If @callback is non-null, the connect is non-blocking. If this - * function succeeds, callback will be called when the connection - * completes, with the file descriptor on success, or -1 on error. */ -int inet_connect_saddr(InetSocketAddress *saddr, - NonBlockingConnectHandler *callback, void *opaque, - Error **errp) +int inet_connect_saddr(InetSocketAddress *saddr, Error **errp) { Error *local_err = NULL; struct addrinfo *res, *e; int sock = -1; - bool in_progress; - ConnectState *connect_state = NULL; res = inet_parse_connect_saddr(saddr, errp); if (!res) { return -1; } - if (callback != NULL) { - connect_state = g_malloc0(sizeof(*connect_state)); - connect_state->addr_list = res; - connect_state->callback = callback; - connect_state->opaque = opaque; - } - for (e = res; e != NULL; e = e->ai_next) { error_free(local_err); local_err = NULL; - if (connect_state != NULL) { - connect_state->current_addr = e; - } - sock = inet_connect_addr(e, &in_progress, connect_state, &local_err); + sock = inet_connect_addr(e, &local_err); if (sock >= 0) { break; } @@ -501,15 +409,8 @@ int inet_connect_saddr(InetSocketAddress *saddr, if (sock < 0) { error_propagate(errp, local_err); - } else if (in_progress) { - /* wait_for_connect() will do the rest */ - return sock; - } else { - if (callback) { - callback(sock, NULL, opaque); - } } - g_free(connect_state); + freeaddrinfo(res); return sock; } @@ -688,7 +589,7 @@ int inet_connect(const char *str, Error **errp) InetSocketAddress *addr = g_new(InetSocketAddress, 1); if (!inet_parse(addr, str, errp)) { - sock = inet_connect_saddr(addr, NULL, NULL, errp); + sock = inet_connect_saddr(addr, errp); } qapi_free_InetSocketAddress(addr); return sock; @@ -721,21 +622,16 @@ static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr, return true; } -static int vsock_connect_addr(const struct sockaddr_vm *svm, bool *in_progress, - ConnectState *connect_state, Error **errp) +static int vsock_connect_addr(const struct sockaddr_vm *svm, Error **errp) { int sock, rc; - *in_progress = false; - sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0); if (sock < 0) { error_setg_errno(errp, errno, "Failed to create socket"); return -1; } - if (connect_state != NULL) { - qemu_set_nonblock(sock); - } + /* connect to peer */ do { rc = 0; @@ -744,50 +640,26 @@ static int vsock_connect_addr(const struct sockaddr_vm *svm, bool *in_progress, } } while (rc == -EINTR); - if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { - connect_state->fd = sock; - qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state); - *in_progress = true; - } else if (rc < 0) { + if (rc < 0) { error_setg_errno(errp, errno, "Failed to connect socket"); closesocket(sock); return -1; } + return sock; } -static int vsock_connect_saddr(VsockSocketAddress *vaddr, - NonBlockingConnectHandler *callback, - void *opaque, - Error **errp) +static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp) { struct sockaddr_vm svm; int sock = -1; - bool in_progress; - ConnectState *connect_state = NULL; if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) { return -1; } - if (callback != NULL) { - connect_state = g_malloc0(sizeof(*connect_state)); - connect_state->callback = callback; - connect_state->opaque = opaque; - } + sock = vsock_connect_addr(&svm, errp); - sock = vsock_connect_addr(&svm, &in_progress, connect_state, errp); - if (sock < 0) { - /* do nothing */ - } else if (in_progress) { - /* wait_for_connect() will do the rest */ - return sock; - } else { - if (callback) { - callback(sock, NULL, opaque); - } - } - g_free(connect_state); return sock; } @@ -847,9 +719,7 @@ static void vsock_unsupported(Error **errp) error_setg(errp, "socket family AF_VSOCK unsupported"); } -static int vsock_connect_saddr(VsockSocketAddress *vaddr, - NonBlockingConnectHandler *callback, - void *opaque, Error **errp) +static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp) { vsock_unsupported(errp); return -1; @@ -952,12 +822,9 @@ err: return -1; } -static int unix_connect_saddr(UnixSocketAddress *saddr, - NonBlockingConnectHandler *callback, void *opaque, - Error **errp) +static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp) { struct sockaddr_un un; - ConnectState *connect_state = NULL; int sock, rc; if (saddr->path == NULL) { @@ -970,12 +837,6 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, error_setg_errno(errp, errno, "Failed to create socket"); return -1; } - if (callback != NULL) { - connect_state = g_malloc0(sizeof(*connect_state)); - connect_state->callback = callback; - connect_state->opaque = opaque; - qemu_set_nonblock(sock); - } if (strlen(saddr->path) > sizeof(un.sun_path)) { error_setg(errp, "UNIX socket path '%s' is too long", saddr->path); @@ -996,29 +857,16 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, } } while (rc == -EINTR); - if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { - connect_state->fd = sock; - qemu_set_fd_handler(sock, NULL, wait_for_connect, connect_state); - return sock; - } else if (rc >= 0) { - /* non blocking socket immediate success, call callback */ - if (callback != NULL) { - callback(sock, NULL, opaque); - } - } - if (rc < 0) { error_setg_errno(errp, -rc, "Failed to connect socket %s", saddr->path); goto err; } - g_free(connect_state); return sock; err: close(sock); - g_free(connect_state); return -1; } @@ -1033,9 +881,7 @@ static int unix_listen_saddr(UnixSocketAddress *saddr, return -1; } -static int unix_connect_saddr(UnixSocketAddress *saddr, - NonBlockingConnectHandler *callback, void *opaque, - Error **errp) +static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp) { error_setg(errp, "unix sockets are not available on windows"); errno = ENOTSUP; @@ -1081,7 +927,7 @@ int unix_connect(const char *path, Error **errp) saddr = g_new0(UnixSocketAddress, 1); saddr->path = g_strdup(path); - sock = unix_connect_saddr(saddr, NULL, NULL, errp); + sock = unix_connect_saddr(saddr, errp); qapi_free_UnixSocketAddress(saddr); return sock; } @@ -1126,30 +972,25 @@ fail: return NULL; } -int socket_connect(SocketAddress *addr, NonBlockingConnectHandler *callback, - void *opaque, Error **errp) +int socket_connect(SocketAddress *addr, Error **errp) { int fd; switch (addr->type) { case SOCKET_ADDRESS_TYPE_INET: - fd = inet_connect_saddr(&addr->u.inet, callback, opaque, errp); + fd = inet_connect_saddr(&addr->u.inet, errp); break; case SOCKET_ADDRESS_TYPE_UNIX: - fd = unix_connect_saddr(&addr->u.q_unix, callback, opaque, errp); + fd = unix_connect_saddr(&addr->u.q_unix, errp); break; case SOCKET_ADDRESS_TYPE_FD: fd = monitor_get_fd(cur_mon, addr->u.fd.str, errp); - if (fd >= 0 && callback) { - qemu_set_nonblock(fd); - callback(fd, NULL, opaque); - } break; case SOCKET_ADDRESS_TYPE_VSOCK: - fd = vsock_connect_saddr(&addr->u.vsock, callback, opaque, errp); + fd = vsock_connect_saddr(&addr->u.vsock, errp); break; default: |