From patchwork Tue Feb 16 16:15:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 8329211 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 959ED9F6E7 for ; Tue, 16 Feb 2016 16:31:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8C15020268 for ; Tue, 16 Feb 2016 16:31:07 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 57A062017D for ; Tue, 16 Feb 2016 16:31:06 +0000 (UTC) Received: from localhost ([::1]:47683 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aViWn-0004SZ-Lj for patchwork-qemu-devel@patchwork.kernel.org; Tue, 16 Feb 2016 11:31:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37434) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aViIH-0004Of-Lc for qemu-devel@nongnu.org; Tue, 16 Feb 2016 11:16:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aViIC-0002OV-Q0 for qemu-devel@nongnu.org; Tue, 16 Feb 2016 11:16:05 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47239) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aViIC-0002O9-Ga for qemu-devel@nongnu.org; Tue, 16 Feb 2016 11:16:00 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 386E63B12F3 for ; Tue, 16 Feb 2016 16:16:00 +0000 (UTC) Received: from t530wlan.home.berrange.com.com (vpn1-4-188.ams2.redhat.com [10.36.4.188]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u1GGFPtf003433; Tue, 16 Feb 2016 11:15:58 -0500 From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Tue, 16 Feb 2016 16:15:11 +0000 Message-Id: <1455639318-26578-21-git-send-email-berrange@redhat.com> In-Reply-To: <1455639318-26578-1-git-send-email-berrange@redhat.com> References: <1455639318-26578-1-git-send-email-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Amit Shah , "Dr. David Alan Gilbert" , Juan Quintela Subject: [Qemu-devel] [PATCH v2 20/27] migration: delete QEMUFile sockets implementation X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now that the tcp, unix and fd migration backends have converted to use the QIOChannel based QEMUFile, there is no user remaining for the sockets based QEMUFile impl and it can be deleted. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrange --- include/migration/qemu-file.h | 2 - migration/Makefile.objs | 2 +- migration/qemu-file-unix.c | 325 ------------------------------------------ 3 files changed, 1 insertion(+), 328 deletions(-) delete mode 100644 migration/qemu-file-unix.c diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h index da67931..dc4b7ab 100644 --- a/include/migration/qemu-file.h +++ b/include/migration/qemu-file.h @@ -129,8 +129,6 @@ typedef struct QEMUFileHooks { QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops); QEMUFile *qemu_fopen(const char *filename, const char *mode); -QEMUFile *qemu_fdopen(int fd, const char *mode); -QEMUFile *qemu_fopen_socket(int fd, const char *mode); QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc); QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc); QEMUFile *qemu_popen_cmd(const char *command, const char *mode); diff --git a/migration/Makefile.objs b/migration/Makefile.objs index 3e5a57c..2f9bf12 100644 --- a/migration/Makefile.objs +++ b/migration/Makefile.objs @@ -1,6 +1,6 @@ common-obj-y += migration.o socket.o fd.o exec.o common-obj-y += vmstate.o -common-obj-y += qemu-file.o qemu-file-unix.o qemu-file-stdio.o +common-obj-y += qemu-file.o qemu-file-stdio.o common-obj-y += qemu-file-channel.o common-obj-y += xbzrle.o postcopy-ram.o diff --git a/migration/qemu-file-unix.c b/migration/qemu-file-unix.c deleted file mode 100644 index 61b059b..0000000 --- a/migration/qemu-file-unix.c +++ /dev/null @@ -1,325 +0,0 @@ -/* - * QEMU System Emulator - * - * Copyright (c) 2003-2008 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu/osdep.h" -#include "qemu-common.h" -#include "qemu/error-report.h" -#include "qemu/iov.h" -#include "qemu/sockets.h" -#include "qemu/coroutine.h" -#include "migration/qemu-file.h" -#include "migration/qemu-file-internal.h" - -typedef struct QEMUFileSocket { - int fd; - QEMUFile *file; -} QEMUFileSocket; - -static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt, - int64_t pos) -{ - QEMUFileSocket *s = opaque; - ssize_t len; - ssize_t size = iov_size(iov, iovcnt); - ssize_t offset = 0; - int err; - - while (size > 0) { - len = iov_send(s->fd, iov, iovcnt, offset, size); - - if (len > 0) { - size -= len; - offset += len; - } - - if (size > 0) { - err = socket_error(); - - if (err != EAGAIN && err != EWOULDBLOCK) { - error_report("socket_writev_buffer: Got err=%d for (%zu/%zu)", - err, (size_t)size, (size_t)len); - /* - * If I've already sent some but only just got the error, I - * could return the amount validly sent so far and wait for the - * next call to report the error, but I'd rather flag the error - * immediately. - */ - return -err; - } - - /* Emulate blocking */ - GPollFD pfd; - - pfd.fd = s->fd; - pfd.events = G_IO_OUT | G_IO_ERR; - pfd.revents = 0; - TFR(err = g_poll(&pfd, 1, -1 /* no timeout */)); - /* Errors other than EINTR intentionally ignored */ - } - } - - return offset; -} - -static int socket_get_fd(void *opaque) -{ - QEMUFileSocket *s = opaque; - - return s->fd; -} - -static ssize_t socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, - size_t size) -{ - QEMUFileSocket *s = opaque; - ssize_t len; - - for (;;) { - len = qemu_recv(s->fd, buf, size, 0); - if (len != -1) { - break; - } - if (socket_error() == EAGAIN) { - yield_until_fd_readable(s->fd); - } else if (socket_error() != EINTR) { - break; - } - } - - if (len == -1) { - len = -socket_error(); - } - return len; -} - -static int socket_close(void *opaque) -{ - QEMUFileSocket *s = opaque; - closesocket(s->fd); - g_free(s); - return 0; -} - -static int socket_shutdown(void *opaque, bool rd, bool wr) -{ - QEMUFileSocket *s = opaque; - - if (shutdown(s->fd, rd ? (wr ? SHUT_RDWR : SHUT_RD) : SHUT_WR)) { - return -errno; - } else { - return 0; - } -} - -static int socket_return_close(void *opaque) -{ - QEMUFileSocket *s = opaque; - /* - * Note: We don't close the socket, that should be done by the forward - * path. - */ - g_free(s); - return 0; -} - -static const QEMUFileOps socket_return_read_ops = { - .get_fd = socket_get_fd, - .get_buffer = socket_get_buffer, - .close = socket_return_close, - .shut_down = socket_shutdown, -}; - -static const QEMUFileOps socket_return_write_ops = { - .get_fd = socket_get_fd, - .writev_buffer = socket_writev_buffer, - .close = socket_return_close, - .shut_down = socket_shutdown, -}; - -/* - * Give a QEMUFile* off the same socket but data in the opposite - * direction. - */ -static QEMUFile *socket_get_return_path(void *opaque) -{ - QEMUFileSocket *forward = opaque; - QEMUFileSocket *reverse; - - if (qemu_file_get_error(forward->file)) { - /* If the forward file is in error, don't try and open a return */ - return NULL; - } - - reverse = g_malloc0(sizeof(QEMUFileSocket)); - reverse->fd = forward->fd; - /* I don't think there's a better way to tell which direction 'this' is */ - if (forward->file->ops->get_buffer != NULL) { - /* being called from the read side, so we need to be able to write */ - return qemu_fopen_ops(reverse, &socket_return_write_ops); - } else { - return qemu_fopen_ops(reverse, &socket_return_read_ops); - } -} - -static ssize_t unix_writev_buffer(void *opaque, struct iovec *iov, int iovcnt, - int64_t pos) -{ - QEMUFileSocket *s = opaque; - ssize_t len, offset; - ssize_t size = iov_size(iov, iovcnt); - ssize_t total = 0; - - assert(iovcnt > 0); - offset = 0; - while (size > 0) { - /* Find the next start position; skip all full-sized vector elements */ - while (offset >= iov[0].iov_len) { - offset -= iov[0].iov_len; - iov++, iovcnt--; - } - - /* skip `offset' bytes from the (now) first element, undo it on exit */ - assert(iovcnt > 0); - iov[0].iov_base += offset; - iov[0].iov_len -= offset; - - do { - len = writev(s->fd, iov, iovcnt); - } while (len == -1 && errno == EINTR); - if (len == -1) { - return -errno; - } - - /* Undo the changes above */ - iov[0].iov_base -= offset; - iov[0].iov_len += offset; - - /* Prepare for the next iteration */ - offset += len; - total += len; - size -= len; - } - - return total; -} - -static ssize_t unix_get_buffer(void *opaque, uint8_t *buf, int64_t pos, - size_t size) -{ - QEMUFileSocket *s = opaque; - ssize_t len; - - for (;;) { - len = read(s->fd, buf, size); - if (len != -1) { - break; - } - if (errno == EAGAIN) { - yield_until_fd_readable(s->fd); - } else if (errno != EINTR) { - break; - } - } - - if (len == -1) { - len = -errno; - } - return len; -} - -static int unix_close(void *opaque) -{ - QEMUFileSocket *s = opaque; - close(s->fd); - g_free(s); - return 0; -} - -static const QEMUFileOps unix_read_ops = { - .get_fd = socket_get_fd, - .get_buffer = unix_get_buffer, - .close = unix_close -}; - -static const QEMUFileOps unix_write_ops = { - .get_fd = socket_get_fd, - .writev_buffer = unix_writev_buffer, - .close = unix_close -}; - -QEMUFile *qemu_fdopen(int fd, const char *mode) -{ - QEMUFileSocket *s; - - if (mode == NULL || - (mode[0] != 'r' && mode[0] != 'w') || - mode[1] != 'b' || mode[2] != 0) { - fprintf(stderr, "qemu_fdopen: Argument validity check failed\n"); - return NULL; - } - - s = g_new0(QEMUFileSocket, 1); - s->fd = fd; - - if (mode[0] == 'r') { - s->file = qemu_fopen_ops(s, &unix_read_ops); - } else { - s->file = qemu_fopen_ops(s, &unix_write_ops); - } - return s->file; -} - -static const QEMUFileOps socket_read_ops = { - .get_fd = socket_get_fd, - .get_buffer = socket_get_buffer, - .close = socket_close, - .shut_down = socket_shutdown, - .get_return_path = socket_get_return_path -}; - -static const QEMUFileOps socket_write_ops = { - .get_fd = socket_get_fd, - .writev_buffer = socket_writev_buffer, - .close = socket_close, - .shut_down = socket_shutdown, - .get_return_path = socket_get_return_path -}; - -QEMUFile *qemu_fopen_socket(int fd, const char *mode) -{ - QEMUFileSocket *s; - - if (qemu_file_mode_is_not_valid(mode)) { - return NULL; - } - - s = g_new0(QEMUFileSocket, 1); - s->fd = fd; - if (mode[0] == 'w') { - qemu_set_block(s->fd); - s->file = qemu_fopen_ops(s, &socket_write_ops); - } else { - s->file = qemu_fopen_ops(s, &socket_read_ops); - } - return s->file; -}