* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include <unistd.h>
-#include <fcntl.h>
-#include <time.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <zlib.h>
-
-/* Needed early for CONFIG_BSD etc. */
-#include "config-host.h"
-
-#ifndef _WIN32
-#include <sys/times.h>
-#include <sys/wait.h>
-#include <termios.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <sys/resource.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <net/if.h>
-#include <arpa/inet.h>
-#include <dirent.h>
-#include <netdb.h>
-#include <sys/select.h>
-#ifdef CONFIG_BSD
-#include <sys/stat.h>
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
-#include <libutil.h>
-#else
-#include <util.h>
-#endif
-#ifdef __linux__
-#include <pty.h>
-#include <malloc.h>
-#include <linux/rtc.h>
-#endif
-#endif
-#endif
-
-#ifdef _WIN32
-#include <windows.h>
-#include <malloc.h>
-#include <sys/timeb.h>
-#include <mmsystem.h>
-#define getopt_long_only getopt_long
-#define memalign(align, size) malloc(size)
-#endif
+#include "config-host.h"
#include "qemu-common.h"
#include "hw/hw.h"
#include "hw/qdev.h"
-#include "net.h"
-#include "monitor.h"
-#include "sysemu.h"
-#include "qemu-timer.h"
-#include "qemu-char.h"
+#include "net/net.h"
+#include "monitor/monitor.h"
+#include "sysemu/sysemu.h"
+#include "qemu/timer.h"
#include "audio/audio.h"
-#include "migration.h"
-#include "qemu_socket.h"
-#include "qemu-queue.h"
-#include "qemu-timer.h"
-#include "cpus.h"
-#include "memory.h"
+#include "migration/migration.h"
+#include "qemu/sockets.h"
+#include "qemu/queue.h"
+#include "sysemu/cpus.h"
+#include "exec/memory.h"
+#include "qmp-commands.h"
+#include "trace.h"
+#include "qemu/bitops.h"
+#include "qemu/iov.h"
+#include "block/snapshot.h"
+#include "block/qapi.h"
#define SELF_ANNOUNCE_ROUNDS 5
len = announce_self_create(buf, nic->conf->macaddr.a);
- qemu_send_packet_raw(&nic->nc, buf, len);
+ qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
}
/* savevm/loadvm support */
#define IO_BUF_SIZE 32768
+#define MAX_IOV_SIZE MIN(IOV_MAX, 64)
struct QEMUFile {
- QEMUFilePutBufferFunc *put_buffer;
- QEMUFileGetBufferFunc *get_buffer;
- QEMUFileCloseFunc *close;
- QEMUFileRateLimit *rate_limit;
- QEMUFileSetRateLimit *set_rate_limit;
- QEMUFileGetRateLimit *get_rate_limit;
+ const QEMUFileOps *ops;
void *opaque;
- int is_write;
- int64_t buf_offset; /* start of buffer when writing, end of buffer
- when reading */
+ int64_t bytes_xfer;
+ int64_t xfer_limit;
+
+ int64_t pos; /* start of buffer when writing, end of buffer
+ when reading */
int buf_index;
int buf_size; /* 0 when writing */
uint8_t buf[IO_BUF_SIZE];
+ struct iovec iov[MAX_IOV_SIZE];
+ unsigned int iovcnt;
+
int last_error;
};
QEMUFile *file;
} QEMUFileSocket;
+typedef struct {
+ Coroutine *co;
+ int fd;
+} FDYieldUntilData;
+
+static void fd_coroutine_enter(void *opaque)
+{
+ FDYieldUntilData *data = opaque;
+ qemu_set_fd_handler(data->fd, NULL, NULL, NULL);
+ qemu_coroutine_enter(data->co, NULL);
+}
+
+/**
+ * Yield until a file descriptor becomes readable
+ *
+ * Note that this function clobbers the handlers for the file descriptor.
+ */
+static void coroutine_fn yield_until_fd_readable(int fd)
+{
+ FDYieldUntilData data;
+
+ assert(qemu_in_coroutine());
+ data.co = qemu_coroutine_self();
+ data.fd = fd;
+ qemu_set_fd_handler(fd, fd_coroutine_enter, NULL, &data);
+ qemu_coroutine_yield();
+}
+
+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);
+
+ len = iov_send(s->fd, iov, iovcnt, 0, size);
+ if (len < size) {
+ len = -socket_error();
+ }
+ return len;
+}
+
+static int socket_get_fd(void *opaque)
+{
+ QEMUFileSocket *s = opaque;
+
+ return s->fd;
+}
+
static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
QEMUFileSocket *s = opaque;
ssize_t len;
- do {
+ for (;;) {
len = qemu_recv(s->fd, buf, size, 0);
- } while (len == -1 && socket_error() == EINTR);
+ if (len != -1) {
+ break;
+ }
+ if (socket_error() == EAGAIN) {
+ yield_until_fd_readable(s->fd);
+ } else if (socket_error() != EINTR) {
+ break;
+ }
+ }
- if (len == -1)
+ 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 stdio_get_fd(void *opaque)
+{
+ QEMUFileStdio *s = opaque;
+
+ return fileno(s->stdio_file);
+}
+
static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
{
QEMUFileStdio *s = opaque;
FILE *fp = s->stdio_file;
int bytes;
- do {
+ for (;;) {
clearerr(fp);
bytes = fread(buf, 1, size, fp);
- } while ((bytes == 0) && ferror(fp) && (errno == EINTR));
+ if (bytes != 0 || !ferror(fp)) {
+ break;
+ }
+ if (errno == EAGAIN) {
+ yield_until_fd_readable(fileno(fp));
+ } else if (errno != EINTR) {
+ break;
+ }
+ }
return bytes;
}
ret = pclose(s->stdio_file);
if (ret == -1) {
ret = -errno;
+ } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
+ /* close succeeded, but non-zero exit code: */
+ ret = -EIO; /* fake errno value */
}
g_free(s);
return ret;
{
QEMUFileStdio *s = opaque;
int ret = 0;
+
+ if (s->file->ops->put_buffer || s->file->ops->writev_buffer) {
+ int fd = fileno(s->stdio_file);
+ struct stat st;
+
+ ret = fstat(fd, &st);
+ if (ret == 0 && S_ISREG(st.st_mode)) {
+ /*
+ * If the file handle is a regular file make sure the
+ * data is flushed to disk before signaling success.
+ */
+ ret = fsync(fd);
+ if (ret != 0) {
+ ret = -errno;
+ return ret;
+ }
+ }
+ }
if (fclose(s->stdio_file) == EOF) {
ret = -errno;
}
return ret;
}
-QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
+static const QEMUFileOps stdio_pipe_read_ops = {
+ .get_fd = stdio_get_fd,
+ .get_buffer = stdio_get_buffer,
+ .close = stdio_pclose
+};
+
+static const QEMUFileOps stdio_pipe_write_ops = {
+ .get_fd = stdio_get_fd,
+ .put_buffer = stdio_put_buffer,
+ .close = stdio_pclose
+};
+
+QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
{
+ FILE *stdio_file;
QEMUFileStdio *s;
- if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
+ if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
fprintf(stderr, "qemu_popen: Argument validity check failed\n");
return NULL;
}
+ stdio_file = popen(command, mode);
+ if (stdio_file == NULL) {
+ return NULL;
+ }
+
s = g_malloc0(sizeof(QEMUFileStdio));
s->stdio_file = stdio_file;
if(mode[0] == 'r') {
- s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops);
} else {
- s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops);
}
return s->file;
}
-QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
+static const QEMUFileOps stdio_file_read_ops = {
+ .get_fd = stdio_get_fd,
+ .get_buffer = stdio_get_buffer,
+ .close = stdio_fclose
+};
+
+static const QEMUFileOps stdio_file_write_ops = {
+ .get_fd = stdio_get_fd,
+ .put_buffer = stdio_put_buffer,
+ .close = stdio_fclose
+};
+
+static ssize_t unix_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
+ int64_t pos)
{
- FILE *popen_file;
+ QEMUFileSocket *s = opaque;
+ ssize_t len, offset;
+ ssize_t size = iov_size(iov, iovcnt);
+ ssize_t total = 0;
- popen_file = popen(command, mode);
- if(popen_file == NULL) {
- return NULL;
+ 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 qemu_popen(popen_file, mode);
+ return total;
}
-int qemu_stdio_fd(QEMUFile *f)
+static int unix_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
- QEMUFileStdio *p;
- int fd;
+ 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;
+ }
+ }
- p = (QEMUFileStdio *)f->opaque;
- fd = fileno(p->stdio_file);
+ if (len == -1) {
+ len = -errno;
+ }
+ return len;
+}
- return fd;
+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)
{
- QEMUFileStdio *s;
+ QEMUFileSocket *s;
if (mode == NULL ||
(mode[0] != 'r' && mode[0] != 'w') ||
return NULL;
}
- s = g_malloc0(sizeof(QEMUFileStdio));
- s->stdio_file = fdopen(fd, mode);
- if (!s->stdio_file)
- goto fail;
+ s = g_malloc0(sizeof(QEMUFileSocket));
+ s->fd = fd;
if(mode[0] == 'r') {
- s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &unix_read_ops);
} else {
- s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &unix_write_ops);
}
return s->file;
-
-fail:
- g_free(s);
- return NULL;
}
-QEMUFile *qemu_fopen_socket(int fd)
+static const QEMUFileOps socket_read_ops = {
+ .get_fd = socket_get_fd,
+ .get_buffer = socket_get_buffer,
+ .close = socket_close
+};
+
+static const QEMUFileOps socket_write_ops = {
+ .get_fd = socket_get_fd,
+ .writev_buffer = socket_writev_buffer,
+ .close = socket_close
+};
+
+QEMUFile *qemu_fopen_socket(int fd, const char *mode)
{
QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
+ if (mode == NULL ||
+ (mode[0] != 'r' && mode[0] != 'w') ||
+ mode[1] != 'b' || mode[2] != 0) {
+ fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
+ return NULL;
+ }
+
s->fd = fd;
- s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
- NULL, NULL, NULL);
+ 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;
}
-static int file_put_buffer(void *opaque, const uint8_t *buf,
- int64_t pos, int size)
-{
- QEMUFileStdio *s = opaque;
- fseek(s->stdio_file, pos, SEEK_SET);
- return fwrite(buf, 1, size, s->stdio_file);
-}
-
-static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
-{
- QEMUFileStdio *s = opaque;
- fseek(s->stdio_file, pos, SEEK_SET);
- return fread(buf, 1, size, s->stdio_file);
-}
-
QEMUFile *qemu_fopen(const char *filename, const char *mode)
{
QEMUFileStdio *s;
goto fail;
if(mode[0] == 'w') {
- s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
} else {
- s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
- NULL, NULL, NULL);
+ s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
}
return s->file;
fail:
return NULL;
}
+static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
+ int64_t pos)
+{
+ int ret;
+ QEMUIOVector qiov;
+
+ qemu_iovec_init_external(&qiov, iov, iovcnt);
+ ret = bdrv_writev_vmstate(opaque, &qiov, pos);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return qiov.size;
+}
+
static int block_put_buffer(void *opaque, const uint8_t *buf,
int64_t pos, int size)
{
static int bdrv_fclose(void *opaque)
{
- return 0;
+ return bdrv_flush(opaque);
}
+static const QEMUFileOps bdrv_read_ops = {
+ .get_buffer = block_get_buffer,
+ .close = bdrv_fclose
+};
+
+static const QEMUFileOps bdrv_write_ops = {
+ .put_buffer = block_put_buffer,
+ .writev_buffer = block_writev_buffer,
+ .close = bdrv_fclose
+};
+
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
{
if (is_writable)
- return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose,
- NULL, NULL, NULL);
- return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL);
+ return qemu_fopen_ops(bs, &bdrv_write_ops);
+ return qemu_fopen_ops(bs, &bdrv_read_ops);
}
-QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
- QEMUFileGetBufferFunc *get_buffer,
- QEMUFileCloseFunc *close,
- QEMUFileRateLimit *rate_limit,
- QEMUFileSetRateLimit *set_rate_limit,
- QEMUFileGetRateLimit *get_rate_limit)
+QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops)
{
QEMUFile *f;
f = g_malloc0(sizeof(QEMUFile));
f->opaque = opaque;
- f->put_buffer = put_buffer;
- f->get_buffer = get_buffer;
- f->close = close;
- f->rate_limit = rate_limit;
- f->set_rate_limit = set_rate_limit;
- f->get_rate_limit = get_rate_limit;
- f->is_write = 0;
-
+ f->ops = ops;
return f;
}
return f->last_error;
}
-void qemu_file_set_error(QEMUFile *f, int ret)
+static void qemu_file_set_error(QEMUFile *f, int ret)
{
- f->last_error = ret;
+ if (f->last_error == 0) {
+ f->last_error = ret;
+ }
}
-/** Sets last_error conditionally
- *
- * Sets last_error only if ret is negative _and_ no error
- * was set before.
- */
-static void qemu_file_set_if_error(QEMUFile *f, int ret)
+static inline bool qemu_file_is_writable(QEMUFile *f)
{
- if (ret < 0 && !f->last_error) {
- qemu_file_set_error(f, ret);
- }
+ return f->ops->writev_buffer || f->ops->put_buffer;
}
-/** Flushes QEMUFile buffer
+/**
+ * Flushes QEMUFile buffer
*
- * In case of error, last_error is set.
+ * If there is writev_buffer QEMUFileOps it uses it otherwise uses
+ * put_buffer ops.
*/
-void qemu_fflush(QEMUFile *f)
+static void qemu_fflush(QEMUFile *f)
{
- if (!f->put_buffer)
- return;
+ ssize_t ret = 0;
- if (f->is_write && f->buf_index > 0) {
- int len;
+ if (!qemu_file_is_writable(f)) {
+ return;
+ }
- len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
- if (len > 0)
- f->buf_offset += f->buf_index;
- else
- qemu_file_set_error(f, -EINVAL);
- f->buf_index = 0;
+ if (f->ops->writev_buffer) {
+ if (f->iovcnt > 0) {
+ ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos);
+ }
+ } else {
+ if (f->buf_index > 0) {
+ ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
+ }
+ }
+ if (ret >= 0) {
+ f->pos += ret;
+ }
+ f->buf_index = 0;
+ f->iovcnt = 0;
+ if (ret < 0) {
+ qemu_file_set_error(f, ret);
}
}
int len;
int pending;
- if (!f->get_buffer)
- return;
-
- if (f->is_write)
- abort();
+ assert(!qemu_file_is_writable(f));
pending = f->buf_size - f->buf_index;
if (pending > 0) {
f->buf_index = 0;
f->buf_size = pending;
- len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
+ len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos,
IO_BUF_SIZE - pending);
if (len > 0) {
f->buf_size += len;
- f->buf_offset += len;
+ f->pos += len;
} else if (len == 0) {
- f->last_error = -EIO;
+ qemu_file_set_error(f, -EIO);
} else if (len != -EAGAIN)
qemu_file_set_error(f, len);
}
-/** Calls close function and set last_error if needed
- *
- * Internal function. qemu_fflush() must be called before this.
- *
- * Returns f->close() return value, or 0 if close function is not set.
- */
-static int qemu_close(QEMUFile *f)
+int qemu_get_fd(QEMUFile *f)
{
- int ret = 0;
- if (f->close) {
- ret = f->close(f->opaque);
- qemu_file_set_if_error(f, ret);
+ if (f->ops->get_fd) {
+ return f->ops->get_fd(f->opaque);
}
- return ret;
+ return -1;
}
/** Closes the file
{
int ret;
qemu_fflush(f);
- ret = qemu_close(f);
+ ret = qemu_file_get_error(f);
+
+ if (f->ops->close) {
+ int ret2 = f->ops->close(f->opaque);
+ if (ret >= 0) {
+ ret = ret2;
+ }
+ }
/* If any error was spotted before closing, we should report it
* instead of the close() return value.
*/
return ret;
}
-void qemu_file_put_notify(QEMUFile *f)
+static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size)
+{
+ /* check for adjacent buffer and coalesce them */
+ if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base +
+ f->iov[f->iovcnt - 1].iov_len) {
+ f->iov[f->iovcnt - 1].iov_len += size;
+ } else {
+ f->iov[f->iovcnt].iov_base = (uint8_t *)buf;
+ f->iov[f->iovcnt++].iov_len = size;
+ }
+
+ if (f->iovcnt >= MAX_IOV_SIZE) {
+ qemu_fflush(f);
+ }
+}
+
+void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size)
{
- f->put_buffer(f->opaque, NULL, 0, 0);
+ if (!f->ops->writev_buffer) {
+ qemu_put_buffer(f, buf, size);
+ return;
+ }
+
+ if (f->last_error) {
+ return;
+ }
+
+ f->bytes_xfer += size;
+ add_to_iovec(f, buf, size);
}
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
{
int l;
- if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
- fprintf(stderr,
- "Attempted to write to buffer while read buffer is not empty\n");
- abort();
+ if (f->last_error) {
+ return;
}
- while (!f->last_error && size > 0) {
+ while (size > 0) {
l = IO_BUF_SIZE - f->buf_index;
if (l > size)
l = size;
memcpy(f->buf + f->buf_index, buf, l);
- f->is_write = 1;
+ f->bytes_xfer += size;
+ if (f->ops->writev_buffer) {
+ add_to_iovec(f, f->buf + f->buf_index, l);
+ }
f->buf_index += l;
+ if (f->buf_index == IO_BUF_SIZE) {
+ qemu_fflush(f);
+ }
+ if (qemu_file_get_error(f)) {
+ break;
+ }
buf += l;
size -= l;
- if (f->buf_index >= IO_BUF_SIZE)
- qemu_fflush(f);
}
}
void qemu_put_byte(QEMUFile *f, int v)
{
- if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
- fprintf(stderr,
- "Attempted to write to buffer while read buffer is not empty\n");
- abort();
+ if (f->last_error) {
+ return;
}
- f->buf[f->buf_index++] = v;
- f->is_write = 1;
- if (f->buf_index >= IO_BUF_SIZE)
+ f->buf[f->buf_index] = v;
+ f->bytes_xfer++;
+ if (f->ops->writev_buffer) {
+ add_to_iovec(f, f->buf + f->buf_index, 1);
+ }
+ f->buf_index++;
+ if (f->buf_index == IO_BUF_SIZE) {
qemu_fflush(f);
+ }
}
static void qemu_file_skip(QEMUFile *f, int size)
int pending;
int index;
- if (f->is_write) {
- abort();
- }
+ assert(!qemu_file_is_writable(f));
index = f->buf_index + offset;
pending = f->buf_size - index;
{
int index = f->buf_index + offset;
- if (f->is_write) {
- abort();
- }
+ assert(!qemu_file_is_writable(f));
if (index >= f->buf_size) {
qemu_fill_buffer(f);
int64_t qemu_ftell(QEMUFile *f)
{
- return f->buf_offset - f->buf_size + f->buf_index;
+ qemu_fflush(f);
+ return f->pos;
}
-int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
+int qemu_file_rate_limit(QEMUFile *f)
{
- if (whence == SEEK_SET) {
- /* nothing to do */
- } else if (whence == SEEK_CUR) {
- pos += qemu_ftell(f);
- } else {
- /* SEEK_END not supported */
- return -1;
+ if (qemu_file_get_error(f)) {
+ return 1;
}
- if (f->put_buffer) {
- qemu_fflush(f);
- f->buf_offset = pos;
- } else {
- f->buf_offset = pos;
- f->buf_index = 0;
- f->buf_size = 0;
+ if (f->xfer_limit > 0 && f->bytes_xfer > f->xfer_limit) {
+ return 1;
}
- return pos;
-}
-
-int qemu_file_rate_limit(QEMUFile *f)
-{
- if (f->rate_limit)
- return f->rate_limit(f->opaque);
-
return 0;
}
int64_t qemu_file_get_rate_limit(QEMUFile *f)
{
- if (f->get_rate_limit)
- return f->get_rate_limit(f->opaque);
-
- return 0;
+ return f->xfer_limit;
}
-int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate)
+void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit)
{
- /* any failed or completed migration keeps its state to allow probing of
- * migration data, but has no associated file anymore */
- if (f && f->set_rate_limit)
- return f->set_rate_limit(f->opaque, new_rate);
+ f->xfer_limit = limit;
+}
- return 0;
+void qemu_file_reset_rate_limit(QEMUFile *f)
+{
+ f->bytes_xfer = 0;
}
void qemu_put_be16(QEMUFile *f, unsigned int v)
.put = put_uint64,
};
+/* 64 bit unsigned int. See that the received value is the same than the one
+ in the field */
+
+static int get_uint64_equal(QEMUFile *f, void *pv, size_t size)
+{
+ uint64_t *v = pv;
+ uint64_t v2;
+ qemu_get_be64s(f, &v2);
+
+ if (*v == v2) {
+ return 0;
+ }
+ return -EINVAL;
+}
+
+const VMStateInfo vmstate_info_uint64_equal = {
+ .name = "int64 equal",
+ .get = get_uint64_equal,
+ .put = put_uint64,
+};
+
/* 8 bit int. See that the received value is the same than the one
in the field */
.put = put_uint16,
};
+/* floating point */
+
+static int get_float64(QEMUFile *f, void *pv, size_t size)
+{
+ float64 *v = pv;
+
+ *v = make_float64(qemu_get_be64(f));
+ return 0;
+}
+
+static void put_float64(QEMUFile *f, void *pv, size_t size)
+{
+ uint64_t *v = pv;
+
+ qemu_put_be64(f, float64_val(*v));
+}
+
+const VMStateInfo vmstate_info_float64 = {
+ .name = "float64",
+ .get = get_float64,
+ .put = put_float64,
+};
+
/* timers */
static int get_timer(QEMUFile *f, void *pv, size_t size)
.put = put_unused_buffer,
};
+/* bitmaps (as defined by bitmap.h). Note that size here is the size
+ * of the bitmap in bits. The on-the-wire format of a bitmap is 64
+ * bit words with the bits in big endian order. The in-memory format
+ * is an array of 'unsigned long', which may be either 32 or 64 bits.
+ */
+/* This is the number of 64 bit words sent over the wire */
+#define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
+static int get_bitmap(QEMUFile *f, void *pv, size_t size)
+{
+ unsigned long *bmp = pv;
+ int i, idx = 0;
+ for (i = 0; i < BITS_TO_U64S(size); i++) {
+ uint64_t w = qemu_get_be64(f);
+ bmp[idx++] = w;
+ if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
+ bmp[idx++] = w >> 32;
+ }
+ }
+ return 0;
+}
+
+static void put_bitmap(QEMUFile *f, void *pv, size_t size)
+{
+ unsigned long *bmp = pv;
+ int i, idx = 0;
+ for (i = 0; i < BITS_TO_U64S(size); i++) {
+ uint64_t w = bmp[idx++];
+ if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
+ w |= ((uint64_t)bmp[idx++]) << 32;
+ }
+ qemu_put_be64(f, w);
+ }
+}
+
+const VMStateInfo vmstate_info_bitmap = {
+ .name = "bitmap",
+ .get = get_bitmap,
+ .put = put_bitmap,
+};
+
typedef struct CompatEntry {
char idstr[256];
int instance_id;
int alias_id;
int version_id;
int section_id;
- SaveSetParamsHandler *set_params;
- SaveLiveStateHandler *save_live_state;
- SaveStateHandler *save_state;
- LoadStateHandler *load_state;
+ SaveVMHandlers *ops;
const VMStateDescription *vmsd;
void *opaque;
CompatEntry *compat;
int no_migrate;
+ int is_ram;
} SaveStateEntry;
const char *idstr,
int instance_id,
int version_id,
- SaveSetParamsHandler *set_params,
- SaveLiveStateHandler *save_live_state,
- SaveStateHandler *save_state,
- LoadStateHandler *load_state,
+ SaveVMHandlers *ops,
void *opaque)
{
SaveStateEntry *se;
se = g_malloc0(sizeof(SaveStateEntry));
se->version_id = version_id;
se->section_id = global_section_id++;
- se->set_params = set_params;
- se->save_live_state = save_live_state;
- se->save_state = save_state;
- se->load_state = load_state;
+ se->ops = ops;
se->opaque = opaque;
se->vmsd = NULL;
se->no_migrate = 0;
+ /* if this is a live_savem then set is_ram */
+ if (ops->save_live_setup != NULL) {
+ se->is_ram = 1;
+ }
- if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
- char *id = dev->parent_bus->info->get_dev_path(dev);
+ if (dev) {
+ char *id = qdev_get_dev_path(dev);
if (id) {
pstrcpy(se->idstr, sizeof(se->idstr), id);
pstrcat(se->idstr, sizeof(se->idstr), "/");
LoadStateHandler *load_state,
void *opaque)
{
+ SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
+ ops->save_state = save_state;
+ ops->load_state = load_state;
return register_savevm_live(dev, idstr, instance_id, version_id,
- NULL, NULL, save_state, load_state, opaque);
+ ops, opaque);
}
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
SaveStateEntry *se, *new_se;
char id[256] = "";
- if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
- char *path = dev->parent_bus->info->get_dev_path(dev);
+ if (dev) {
+ char *path = qdev_get_dev_path(dev);
if (path) {
pstrcpy(id, sizeof(id), path);
pstrcat(id, sizeof(id), "/");
if (se->compat) {
g_free(se->compat);
}
+ g_free(se->ops);
g_free(se);
}
}
se = g_malloc0(sizeof(SaveStateEntry));
se->version_id = vmsd->version_id;
se->section_id = global_section_id++;
- se->save_live_state = NULL;
- se->save_state = NULL;
- se->load_state = NULL;
se->opaque = opaque;
se->vmsd = vmsd;
se->alias_id = alias_id;
se->no_migrate = vmsd->unmigratable;
- if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
- char *id = dev->parent_bus->info->get_dev_path(dev);
+ if (dev) {
+ char *id = qdev_get_dev_path(dev);
if (id) {
pstrcpy(se->idstr, sizeof(se->idstr), id);
pstrcat(se->idstr, sizeof(se->idstr), "/");
return 0;
}
-int vmstate_register(DeviceState *dev, int instance_id,
- const VMStateDescription *vmsd, void *opaque)
-{
- return vmstate_register_with_alias_id(dev, instance_id, vmsd,
- opaque, -1, 0);
-}
-
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
void *opaque)
{
n_elems = field->num;
} else if (field->flags & VMS_VARRAY_INT32) {
n_elems = *(int32_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT32) {
+ n_elems = *(uint32_t *)(opaque+field->num_offset);
} else if (field->flags & VMS_VARRAY_UINT16) {
n_elems = *(uint16_t *)(opaque+field->num_offset);
} else if (field->flags & VMS_VARRAY_UINT8) {
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
{
if (!se->vmsd) { /* Old style */
- return se->load_state(f, se->opaque, version_id);
+ return se->ops->load_state(f, se->opaque, version_id);
}
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
}
static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
{
if (!se->vmsd) { /* Old style */
- se->save_state(f, se->opaque);
+ se->ops->save_state(f, se->opaque);
return;
}
vmstate_save_state(f,se->vmsd, se->opaque);
#define QEMU_VM_SECTION_FULL 0x04
#define QEMU_VM_SUBSECTION 0x05
-bool qemu_savevm_state_blocked(Monitor *mon)
+bool qemu_savevm_state_blocked(Error **errp)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->no_migrate) {
- monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
- se->idstr);
+ error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr);
return true;
}
}
return false;
}
-int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
- int shared)
+void qemu_savevm_state_begin(QEMUFile *f,
+ const MigrationParams *params)
{
SaveStateEntry *se;
int ret;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
- if(se->set_params == NULL) {
+ if (!se->ops || !se->ops->set_params) {
continue;
- }
- se->set_params(blk_enable, shared, se->opaque);
+ }
+ se->ops->set_params(params, se->opaque);
}
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
int len;
- if (se->save_live_state == NULL)
+ if (!se->ops || !se->ops->save_live_setup) {
continue;
-
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_START);
qemu_put_be32(f, se->section_id);
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
+ ret = se->ops->save_live_setup(f, se->opaque);
if (ret < 0) {
- qemu_savevm_state_cancel(mon, f);
- return ret;
+ qemu_file_set_error(f, ret);
+ break;
}
}
- ret = qemu_file_get_error(f);
- if (ret != 0) {
- qemu_savevm_state_cancel(mon, f);
- }
-
- return ret;
-
}
/*
* 0 : We haven't finished, caller have to go again
* 1 : We have finished, we can go to complete phase
*/
-int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
+int qemu_savevm_state_iterate(QEMUFile *f)
{
SaveStateEntry *se;
int ret = 1;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
- if (se->save_live_state == NULL)
+ if (!se->ops || !se->ops->save_live_iterate) {
continue;
-
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ if (qemu_file_rate_limit(f)) {
+ return 0;
+ }
+ trace_savevm_section_start();
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_PART);
qemu_put_be32(f, se->section_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
+ ret = se->ops->save_live_iterate(f, se->opaque);
+ trace_savevm_section_end(se->section_id);
+
+ if (ret < 0) {
+ qemu_file_set_error(f, ret);
+ }
if (ret <= 0) {
/* Do not proceed to the next vmstate before this one reported
completion of the current stage. This serializes the migration
break;
}
}
- if (ret != 0) {
- return ret;
- }
- ret = qemu_file_get_error(f);
- if (ret != 0) {
- qemu_savevm_state_cancel(mon, f);
- }
return ret;
}
-int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
+void qemu_savevm_state_complete(QEMUFile *f)
{
SaveStateEntry *se;
int ret;
cpu_synchronize_all_states();
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
- if (se->save_live_state == NULL)
+ if (!se->ops || !se->ops->save_live_complete) {
continue;
-
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ trace_savevm_section_start();
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_END);
qemu_put_be32(f, se->section_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
+ ret = se->ops->save_live_complete(f, se->opaque);
+ trace_savevm_section_end(se->section_id);
if (ret < 0) {
- return ret;
+ qemu_file_set_error(f, ret);
+ return;
}
}
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
int len;
- if (se->save_state == NULL && se->vmsd == NULL)
+ if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
continue;
-
+ }
+ trace_savevm_section_start();
/* Section type */
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
qemu_put_be32(f, se->section_id);
qemu_put_be32(f, se->version_id);
vmstate_save(f, se);
+ trace_savevm_section_end(se->section_id);
}
qemu_put_byte(f, QEMU_VM_EOF);
+ qemu_fflush(f);
+}
- return qemu_file_get_error(f);
+uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size)
+{
+ SaveStateEntry *se;
+ uint64_t ret = 0;
+
+ QTAILQ_FOREACH(se, &savevm_handlers, entry) {
+ if (!se->ops || !se->ops->save_live_pending) {
+ continue;
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ ret += se->ops->save_live_pending(f, se->opaque, max_size);
+ }
+ return ret;
}
-void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
+void qemu_savevm_state_cancel(void)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
- if (se->save_live_state) {
- se->save_live_state(mon, f, -1, se->opaque);
+ if (se->ops && se->ops->cancel) {
+ se->ops->cancel(se->opaque);
}
}
}
-static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
+static int qemu_savevm_state(QEMUFile *f)
{
int ret;
+ MigrationParams params = {
+ .blk = 0,
+ .shared = 0
+ };
- if (qemu_savevm_state_blocked(mon)) {
- ret = -EINVAL;
- goto out;
+ if (qemu_savevm_state_blocked(NULL)) {
+ return -EINVAL;
}
- ret = qemu_savevm_state_begin(mon, f, 0, 0);
- if (ret < 0)
- goto out;
+ qemu_mutex_unlock_iothread();
+ qemu_savevm_state_begin(f, ¶ms);
+ qemu_mutex_lock_iothread();
- do {
- ret = qemu_savevm_state_iterate(mon, f);
- if (ret < 0)
- goto out;
- } while (ret == 0);
-
- ret = qemu_savevm_state_complete(mon, f);
+ while (qemu_file_get_error(f) == 0) {
+ if (qemu_savevm_state_iterate(f) > 0) {
+ break;
+ }
+ }
-out:
+ ret = qemu_file_get_error(f);
if (ret == 0) {
+ qemu_savevm_state_complete(f);
ret = qemu_file_get_error(f);
}
-
+ if (ret != 0) {
+ qemu_savevm_state_cancel();
+ }
return ret;
}
+static int qemu_save_device_state(QEMUFile *f)
+{
+ SaveStateEntry *se;
+
+ qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
+ qemu_put_be32(f, QEMU_VM_FILE_VERSION);
+
+ cpu_synchronize_all_states();
+
+ QTAILQ_FOREACH(se, &savevm_handlers, entry) {
+ int len;
+
+ if (se->is_ram) {
+ continue;
+ }
+ if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
+ continue;
+ }
+
+ /* Section type */
+ qemu_put_byte(f, QEMU_VM_SECTION_FULL);
+ qemu_put_be32(f, se->section_id);
+
+ /* ID string */
+ len = strlen(se->idstr);
+ qemu_put_byte(f, len);
+ qemu_put_buffer(f, (uint8_t *)se->idstr, len);
+
+ qemu_put_be32(f, se->instance_id);
+ qemu_put_be32(f, se->version_id);
+
+ vmstate_save(f, se);
+ }
+
+ qemu_put_byte(f, QEMU_VM_EOF);
+
+ return qemu_file_get_error(f);
+}
+
static SaveStateEntry *find_se(const char *idstr, int instance_id)
{
SaveStateEntry *se;
unsigned int v;
int ret;
- if (qemu_savevm_state_blocked(default_mon)) {
+ if (qemu_savevm_state_blocked(NULL)) {
return -EINVAL;
}
return ret;
}
-static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
- const char *name)
+static BlockDriverState *find_vmstate_bs(void)
{
- QEMUSnapshotInfo *sn_tab, *sn;
- int nb_sns, i, ret;
-
- ret = -ENOENT;
- nb_sns = bdrv_snapshot_list(bs, &sn_tab);
- if (nb_sns < 0)
- return ret;
- for(i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
- *sn_info = *sn;
- ret = 0;
- break;
+ BlockDriverState *bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+ if (bdrv_can_snapshot(bs)) {
+ return bs;
}
}
- g_free(sn_tab);
- return ret;
+ return NULL;
}
/*
QEMUFile *f;
int saved_vm_running;
uint64_t vm_state_size;
-#ifdef _WIN32
- struct _timeb tb;
- struct tm *ptm;
-#else
- struct timeval tv;
+ qemu_timeval tv;
struct tm tm;
-#endif
const char *name = qdict_get_try_str(qdict, "name");
/* Verify if there is a device that doesn't support snapshots and is writable */
}
}
- bs = bdrv_snapshots();
+ bs = find_vmstate_bs();
if (!bs) {
monitor_printf(mon, "No block device can accept snapshots\n");
return;
memset(sn, 0, sizeof(*sn));
/* fill auxiliary fields */
-#ifdef _WIN32
- _ftime(&tb);
- sn->date_sec = tb.time;
- sn->date_nsec = tb.millitm * 1000000;
-#else
- gettimeofday(&tv, NULL);
+ qemu_gettimeofday(&tv);
sn->date_sec = tv.tv_sec;
sn->date_nsec = tv.tv_usec * 1000;
-#endif
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
if (name) {
pstrcpy(sn->name, sizeof(sn->name), name);
}
} else {
-#ifdef _WIN32
- ptm = localtime(&tb.time);
- strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
-#else
/* cast below needed for OpenBSD where tv_sec is still 'long' */
localtime_r((const time_t *)&tv.tv_sec, &tm);
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
-#endif
}
/* Delete old snapshots of the same name */
monitor_printf(mon, "Could not open VM state file\n");
goto the_end;
}
- ret = qemu_savevm_state(mon, f);
+ ret = qemu_savevm_state(f);
vm_state_size = qemu_ftell(f);
qemu_fclose(f);
if (ret < 0) {
vm_start();
}
+void qmp_xen_save_devices_state(const char *filename, Error **errp)
+{
+ QEMUFile *f;
+ int saved_vm_running;
+ int ret;
+
+ saved_vm_running = runstate_is_running();
+ vm_stop(RUN_STATE_SAVE_VM);
+
+ f = qemu_fopen(filename, "wb");
+ if (!f) {
+ error_set(errp, QERR_OPEN_FILE_FAILED, filename);
+ goto the_end;
+ }
+ ret = qemu_save_device_state(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
+ }
+
+ the_end:
+ if (saved_vm_running)
+ vm_start();
+}
+
int load_vmstate(const char *name)
{
BlockDriverState *bs, *bs_vm_state;
QEMUFile *f;
int ret;
- bs_vm_state = bdrv_snapshots();
+ bs_vm_state = find_vmstate_bs();
if (!bs_vm_state) {
error_report("No block device supports snapshots");
return -ENOTSUP;
int ret;
const char *name = qdict_get_str(qdict, "name");
- bs = bdrv_snapshots();
+ bs = find_vmstate_bs();
if (!bs) {
monitor_printf(mon, "No block device supports snapshots\n");
return;
}
}
-void do_info_snapshots(Monitor *mon)
+void do_info_snapshots(Monitor *mon, const QDict *qdict)
{
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
int nb_sns, i, ret, available;
int total;
int *available_snapshots;
- char buf[256];
- bs = bdrv_snapshots();
+ bs = find_vmstate_bs();
if (!bs) {
monitor_printf(mon, "No available block device supports snapshots\n");
return;
}
if (total > 0) {
- monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
+ bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL);
+ monitor_printf(mon, "\n");
for (i = 0; i < total; i++) {
sn = &sn_tab[available_snapshots[i]];
- monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
+ bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, sn);
+ monitor_printf(mon, "\n");
}
} else {
monitor_printf(mon, "There is no suitable snapshot available\n");
void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
{
- qemu_ram_set_idstr(memory_region_get_ram_addr(mr),
+ qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK,
memory_region_name(mr), dev);
}
projects / qemu.git / blobdiff