diff options
| -rw-r--r-- | include/migration/qemu-file.h | 2 | ||||
| -rw-r--r-- | migration/Makefile.objs | 2 | ||||
| -rw-r--r-- | migration/qemu-file-unix.c | 323 |
3 files changed, 1 insertions, 326 deletions
diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h index edaf598ea9..ba5fe081ec 100644 --- a/include/migration/qemu-file.h +++ b/include/migration/qemu-file.h @@ -128,8 +128,6 @@ 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 9e977a4c83..5260048636 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 common-obj-y += qjson.o diff --git a/migration/qemu-file-unix.c b/migration/qemu-file-unix.c deleted file mode 100644 index 4474e18ff8..0000000000 --- a/migration/qemu-file-unix.c +++ /dev/null @@ -1,323 +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) { - if (errno != EAGAIN && errno != EWOULDBLOCK) { - error_report("socket_writev_buffer: Got err=%d for (%zu/%zu)", - errno, (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 -errno; - } - - /* 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 (errno == EAGAIN) { - yield_until_fd_readable(s->fd); - } else if (errno != EINTR) { - break; - } - } - - if (len == -1) { - len = -errno; - } - 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; -} |