--- /dev/null
+/*
+ * 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-common.h"
+#include "hw/hw.h"
+#include "net.h"
+#include "console.h"
+#include "sysemu.h"
+#include "qemu-timer.h"
+#include "qemu-char.h"
+#include "block.h"
+#include "audio/audio.h"
+#include "migration.h"
+#include "qemu_socket.h"
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <time.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <zlib.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>
+#if defined(__NetBSD__)
+#include <net/if_tap.h>
+#endif
+#ifdef __linux__
+#include <linux/if_tun.h>
+#endif
+#include <arpa/inet.h>
+#include <dirent.h>
+#include <netdb.h>
+#include <sys/select.h>
+#ifdef _BSD
+#include <sys/stat.h>
+#ifdef __FreeBSD__
+#include <libutil.h>
+#else
+#include <util.h>
+#endif
+#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
+#include <freebsd/stdlib.h>
+#else
+#ifdef __linux__
+#include <pty.h>
+#include <malloc.h>
+#include <linux/rtc.h>
+#endif
+#endif
+#endif
+
+#ifdef _WIN32
+#include <malloc.h>
+#include <sys/timeb.h>
+#include <mmsystem.h>
+#define getopt_long_only getopt_long
+#define memalign(align, size) malloc(size)
+#endif
+
+/* point to the block driver where the snapshots are managed */
+static BlockDriverState *bs_snapshots;
+
+#define SELF_ANNOUNCE_ROUNDS 5
+#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
+//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
+#define EXPERIMENTAL_MAGIC 0xf1f23f4f
+
+static int announce_self_create(uint8_t *buf,
+ uint8_t *mac_addr)
+{
+ uint32_t magic = EXPERIMENTAL_MAGIC;
+ uint16_t proto = htons(ETH_P_EXPERIMENTAL);
+
+ /* FIXME: should we send a different packet (arp/rarp/ping)? */
+
+ memset(buf, 0xff, 6); /* h_dst */
+ memcpy(buf + 6, mac_addr, 6); /* h_src */
+ memcpy(buf + 12, &proto, 2); /* h_proto */
+ memcpy(buf + 14, &magic, 4); /* magic */
+
+ return 18; /* len */
+}
+
+void qemu_announce_self(void)
+{
+ int i, j, len;
+ VLANState *vlan;
+ VLANClientState *vc;
+ uint8_t buf[256];
+
+ for (i = 0; i < nb_nics; i++) {
+ len = announce_self_create(buf, nd_table[i].macaddr);
+ vlan = nd_table[i].vlan;
+ for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
+ for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
+ vc->fd_read(vc->opaque, buf, len);
+ }
+ }
+}
+
+/***********************************************************/
+/* savevm/loadvm support */
+
+#define IO_BUF_SIZE 32768
+
+struct QEMUFile {
+ QEMUFilePutBufferFunc *put_buffer;
+ QEMUFileGetBufferFunc *get_buffer;
+ QEMUFileCloseFunc *close;
+ QEMUFileRateLimit *rate_limit;
+ void *opaque;
+ int is_write;
+
+ int64_t buf_offset; /* 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];
+
+ int has_error;
+};
+
+typedef struct QEMUFilePopen
+{
+ FILE *popen_file;
+ QEMUFile *file;
+} QEMUFilePopen;
+
+typedef struct QEMUFileSocket
+{
+ int fd;
+ QEMUFile *file;
+} QEMUFileSocket;
+
+static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
+{
+ QEMUFileSocket *s = opaque;
+ ssize_t len;
+
+ do {
+ len = recv(s->fd, buf, size, 0);
+ } while (len == -1 && socket_error() == EINTR);
+
+ if (len == -1)
+ len = -socket_error();
+
+ return len;
+}
+
+static int socket_close(void *opaque)
+{
+ QEMUFileSocket *s = opaque;
+ qemu_free(s);
+ return 0;
+}
+
+static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
+{
+ QEMUFilePopen *s = opaque;
+ return fwrite(buf, 1, size, s->popen_file);
+}
+
+static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
+{
+ QEMUFilePopen *s = opaque;
+ return fread(buf, 1, size, s->popen_file);
+}
+
+static int popen_close(void *opaque)
+{
+ QEMUFilePopen *s = opaque;
+ pclose(s->popen_file);
+ qemu_free(s);
+ return 0;
+}
+
+QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
+{
+ QEMUFilePopen *s;
+
+ if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
+ fprintf(stderr, "qemu_popen: Argument validity check failed\n");
+ return NULL;
+ }
+
+ s = qemu_mallocz(sizeof(QEMUFilePopen));
+ if (!s) {
+ fprintf(stderr, "qemu_popen: malloc failed\n");
+ return NULL;
+ }
+
+ s->popen_file = popen_file;
+
+ if(mode[0] == 'r') {
+ s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
+ } else {
+ s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
+ }
+ fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
+ return s->file;
+}
+
+QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
+{
+ FILE *popen_file;
+
+ popen_file = popen(command, mode);
+ if(popen_file == NULL) {
+ return NULL;
+ }
+
+ return qemu_popen(popen_file, mode);
+}
+
+QEMUFile *qemu_fopen_socket(int fd)
+{
+ QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
+
+ if (s == NULL)
+ return NULL;
+
+ s->fd = fd;
+ s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
+ return s->file;
+}
+
+typedef struct QEMUFileStdio
+{
+ FILE *outfile;
+} QEMUFileStdio;
+
+static int file_put_buffer(void *opaque, const uint8_t *buf,
+ int64_t pos, int size)
+{
+ QEMUFileStdio *s = opaque;
+ fseek(s->outfile, pos, SEEK_SET);
+ fwrite(buf, 1, size, s->outfile);
+ return size;
+}
+
+static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
+{
+ QEMUFileStdio *s = opaque;
+ fseek(s->outfile, pos, SEEK_SET);
+ return fread(buf, 1, size, s->outfile);
+}
+
+static int file_close(void *opaque)
+{
+ QEMUFileStdio *s = opaque;
+ fclose(s->outfile);
+ qemu_free(s);
+ return 0;
+}
+
+QEMUFile *qemu_fopen(const char *filename, const char *mode)
+{
+ QEMUFileStdio *s;
+
+ s = qemu_mallocz(sizeof(QEMUFileStdio));
+ if (!s)
+ return NULL;
+
+ s->outfile = fopen(filename, mode);
+ if (!s->outfile)
+ goto fail;
+
+ if (!strcmp(mode, "wb"))
+ return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
+ else if (!strcmp(mode, "rb"))
+ return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
+
+fail:
+ if (s->outfile)
+ fclose(s->outfile);
+ qemu_free(s);
+ return NULL;
+}
+
+typedef struct QEMUFileBdrv
+{
+ BlockDriverState *bs;
+ int64_t base_offset;
+} QEMUFileBdrv;
+
+static int bdrv_put_buffer(void *opaque, const uint8_t *buf,
+ int64_t pos, int size)
+{
+ QEMUFileBdrv *s = opaque;
+ bdrv_pwrite(s->bs, s->base_offset + pos, buf, size);
+ return size;
+}
+
+static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
+{
+ QEMUFileBdrv *s = opaque;
+ return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
+}
+
+static int bdrv_fclose(void *opaque)
+{
+ QEMUFileBdrv *s = opaque;
+ qemu_free(s);
+ return 0;
+}
+
+static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
+{
+ QEMUFileBdrv *s;
+
+ s = qemu_mallocz(sizeof(QEMUFileBdrv));
+ if (!s)
+ return NULL;
+
+ s->bs = bs;
+ s->base_offset = offset;
+
+ if (is_writable)
+ return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL);
+
+ return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL);
+}
+
+QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
+ QEMUFileGetBufferFunc *get_buffer,
+ QEMUFileCloseFunc *close,
+ QEMUFileRateLimit *rate_limit)
+{
+ QEMUFile *f;
+
+ f = qemu_mallocz(sizeof(QEMUFile));
+ if (!f)
+ return NULL;
+
+ f->opaque = opaque;
+ f->put_buffer = put_buffer;
+ f->get_buffer = get_buffer;
+ f->close = close;
+ f->rate_limit = rate_limit;
+ f->is_write = 0;
+
+ return f;
+}
+
+int qemu_file_has_error(QEMUFile *f)
+{
+ return f->has_error;
+}
+
+void qemu_fflush(QEMUFile *f)
+{
+ if (!f->put_buffer)
+ return;
+
+ if (f->is_write && f->buf_index > 0) {
+ int len;
+
+ len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
+ if (len > 0)
+ f->buf_offset += f->buf_index;
+ else
+ f->has_error = 1;
+ f->buf_index = 0;
+ }
+}
+
+static void qemu_fill_buffer(QEMUFile *f)
+{
+ int len;
+
+ if (!f->get_buffer)
+ return;
+
+ if (f->is_write)
+ abort();
+
+ len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
+ if (len > 0) {
+ f->buf_index = 0;
+ f->buf_size = len;
+ f->buf_offset += len;
+ } else if (len != -EAGAIN)
+ f->has_error = 1;
+}
+
+int qemu_fclose(QEMUFile *f)
+{
+ int ret = 0;
+ qemu_fflush(f);
+ if (f->close)
+ ret = f->close(f->opaque);
+ qemu_free(f);
+ return ret;
+}
+
+void qemu_file_put_notify(QEMUFile *f)
+{
+ f->put_buffer(f->opaque, NULL, 0, 0);
+}
+
+void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
+{
+ int l;
+
+ if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
+ fprintf(stderr,
+ "Attempted to write to buffer while read buffer is not empty\n");
+ abort();
+ }
+
+ while (!f->has_error && 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->buf_index += l;
+ buf += l;
+ size -= l;
+ if (f->buf_index >= IO_BUF_SIZE)
+ qemu_fflush(f);
+ }
+}
+
+void qemu_put_byte(QEMUFile *f, int v)
+{
+ if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
+ fprintf(stderr,
+ "Attempted to write to buffer while read buffer is not empty\n");
+ abort();
+ }
+
+ f->buf[f->buf_index++] = v;
+ f->is_write = 1;
+ if (f->buf_index >= IO_BUF_SIZE)
+ qemu_fflush(f);
+}
+
+int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
+{
+ int size, l;
+
+ if (f->is_write)
+ abort();
+
+ size = size1;
+ while (size > 0) {
+ l = f->buf_size - f->buf_index;
+ if (l == 0) {
+ qemu_fill_buffer(f);
+ l = f->buf_size - f->buf_index;
+ if (l == 0)
+ break;
+ }
+ if (l > size)
+ l = size;
+ memcpy(buf, f->buf + f->buf_index, l);
+ f->buf_index += l;
+ buf += l;
+ size -= l;
+ }
+ return size1 - size;
+}
+
+int qemu_get_byte(QEMUFile *f)
+{
+ if (f->is_write)
+ abort();
+
+ if (f->buf_index >= f->buf_size) {
+ qemu_fill_buffer(f);
+ if (f->buf_index >= f->buf_size)
+ return 0;
+ }
+ return f->buf[f->buf_index++];
+}
+
+int64_t qemu_ftell(QEMUFile *f)
+{
+ return f->buf_offset - f->buf_size + f->buf_index;
+}
+
+int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
+{
+ if (whence == SEEK_SET) {
+ /* nothing to do */
+ } else if (whence == SEEK_CUR) {
+ pos += qemu_ftell(f);
+ } else {
+ /* SEEK_END not supported */
+ 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;
+ }
+ return pos;
+}
+
+int qemu_file_rate_limit(QEMUFile *f)
+{
+ if (f->rate_limit)
+ return f->rate_limit(f->opaque);
+
+ return 0;
+}
+
+void qemu_put_be16(QEMUFile *f, unsigned int v)
+{
+ qemu_put_byte(f, v >> 8);
+ qemu_put_byte(f, v);
+}
+
+void qemu_put_be32(QEMUFile *f, unsigned int v)
+{
+ qemu_put_byte(f, v >> 24);
+ qemu_put_byte(f, v >> 16);
+ qemu_put_byte(f, v >> 8);
+ qemu_put_byte(f, v);
+}
+
+void qemu_put_be64(QEMUFile *f, uint64_t v)
+{
+ qemu_put_be32(f, v >> 32);
+ qemu_put_be32(f, v);
+}
+
+unsigned int qemu_get_be16(QEMUFile *f)
+{
+ unsigned int v;
+ v = qemu_get_byte(f) << 8;
+ v |= qemu_get_byte(f);
+ return v;
+}
+
+unsigned int qemu_get_be32(QEMUFile *f)
+{
+ unsigned int v;
+ v = qemu_get_byte(f) << 24;
+ v |= qemu_get_byte(f) << 16;
+ v |= qemu_get_byte(f) << 8;
+ v |= qemu_get_byte(f);
+ return v;
+}
+
+uint64_t qemu_get_be64(QEMUFile *f)
+{
+ uint64_t v;
+ v = (uint64_t)qemu_get_be32(f) << 32;
+ v |= qemu_get_be32(f);
+ return v;
+}
+
+typedef struct SaveStateEntry {
+ char idstr[256];
+ int instance_id;
+ int version_id;
+ int section_id;
+ SaveLiveStateHandler *save_live_state;
+ SaveStateHandler *save_state;
+ LoadStateHandler *load_state;
+ void *opaque;
+ struct SaveStateEntry *next;
+} SaveStateEntry;
+
+static SaveStateEntry *first_se;
+
+/* TODO: Individual devices generally have very little idea about the rest
+ of the system, so instance_id should be removed/replaced.
+ Meanwhile pass -1 as instance_id if you do not already have a clearly
+ distinguishing id for all instances of your device class. */
+int register_savevm_live(const char *idstr,
+ int instance_id,
+ int version_id,
+ SaveLiveStateHandler *save_live_state,
+ SaveStateHandler *save_state,
+ LoadStateHandler *load_state,
+ void *opaque)
+{
+ SaveStateEntry *se, **pse;
+ static int global_section_id;
+
+ se = qemu_malloc(sizeof(SaveStateEntry));
+ if (!se)
+ return -1;
+ pstrcpy(se->idstr, sizeof(se->idstr), idstr);
+ se->instance_id = (instance_id == -1) ? 0 : instance_id;
+ se->version_id = version_id;
+ se->section_id = global_section_id++;
+ se->save_live_state = save_live_state;
+ se->save_state = save_state;
+ se->load_state = load_state;
+ se->opaque = opaque;
+ se->next = NULL;
+
+ /* add at the end of list */
+ pse = &first_se;
+ while (*pse != NULL) {
+ if (instance_id == -1
+ && strcmp(se->idstr, (*pse)->idstr) == 0
+ && se->instance_id <= (*pse)->instance_id)
+ se->instance_id = (*pse)->instance_id + 1;
+ pse = &(*pse)->next;
+ }
+ *pse = se;
+ return 0;
+}
+
+int register_savevm(const char *idstr,
+ int instance_id,
+ int version_id,
+ SaveStateHandler *save_state,
+ LoadStateHandler *load_state,
+ void *opaque)
+{
+ return register_savevm_live(idstr, instance_id, version_id,
+ NULL, save_state, load_state, opaque);
+}
+
+#define QEMU_VM_FILE_MAGIC 0x5145564d
+#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
+#define QEMU_VM_FILE_VERSION 0x00000003
+
+#define QEMU_VM_EOF 0x00
+#define QEMU_VM_SECTION_START 0x01
+#define QEMU_VM_SECTION_PART 0x02
+#define QEMU_VM_SECTION_END 0x03
+#define QEMU_VM_SECTION_FULL 0x04
+
+int qemu_savevm_state_begin(QEMUFile *f)
+{
+ SaveStateEntry *se;
+
+ qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
+ qemu_put_be32(f, QEMU_VM_FILE_VERSION);
+
+ for (se = first_se; se != NULL; se = se->next) {
+ int len;
+
+ if (se->save_live_state == NULL)
+ continue;
+
+ /* Section type */
+ qemu_put_byte(f, QEMU_VM_SECTION_START);
+ 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);
+
+ se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
+ }
+
+ if (qemu_file_has_error(f))
+ return -EIO;
+
+ return 0;
+}
+
+int qemu_savevm_state_iterate(QEMUFile *f)
+{
+ SaveStateEntry *se;
+ int ret = 1;
+
+ for (se = first_se; se != NULL; se = se->next) {
+ if (se->save_live_state == NULL)
+ continue;
+
+ /* Section type */
+ qemu_put_byte(f, QEMU_VM_SECTION_PART);
+ qemu_put_be32(f, se->section_id);
+
+ ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
+ }
+
+ if (ret)
+ return 1;
+
+ if (qemu_file_has_error(f))
+ return -EIO;
+
+ return 0;
+}
+
+int qemu_savevm_state_complete(QEMUFile *f)
+{
+ SaveStateEntry *se;
+
+ for (se = first_se; se != NULL; se = se->next) {
+ if (se->save_live_state == NULL)
+ continue;
+
+ /* Section type */
+ qemu_put_byte(f, QEMU_VM_SECTION_END);
+ qemu_put_be32(f, se->section_id);
+
+ se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
+ }
+
+ for(se = first_se; se != NULL; se = se->next) {
+ int len;
+
+ if (se->save_state == NULL)
+ 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);
+
+ se->save_state(f, se->opaque);
+ }
+
+ qemu_put_byte(f, QEMU_VM_EOF);
+
+ if (qemu_file_has_error(f))
+ return -EIO;
+
+ return 0;
+}
+
+int qemu_savevm_state(QEMUFile *f)
+{
+ int saved_vm_running;
+ int ret;
+
+ saved_vm_running = vm_running;
+ vm_stop(0);
+
+ bdrv_flush_all();
+
+ ret = qemu_savevm_state_begin(f);
+ if (ret < 0)
+ goto out;
+
+ do {
+ ret = qemu_savevm_state_iterate(f);
+ if (ret < 0)
+ goto out;
+ } while (ret == 0);
+
+ ret = qemu_savevm_state_complete(f);
+
+out:
+ if (qemu_file_has_error(f))
+ ret = -EIO;
+
+ if (!ret && saved_vm_running)
+ vm_start();
+
+ return ret;
+}
+
+static SaveStateEntry *find_se(const char *idstr, int instance_id)
+{
+ SaveStateEntry *se;
+
+ for(se = first_se; se != NULL; se = se->next) {
+ if (!strcmp(se->idstr, idstr) &&
+ instance_id == se->instance_id)
+ return se;
+ }
+ return NULL;
+}
+
+typedef struct LoadStateEntry {
+ SaveStateEntry *se;
+ int section_id;
+ int version_id;
+ struct LoadStateEntry *next;
+} LoadStateEntry;
+
+static int qemu_loadvm_state_v2(QEMUFile *f)
+{
+ SaveStateEntry *se;
+ int len, ret, instance_id, record_len, version_id;
+ int64_t total_len, end_pos, cur_pos;
+ char idstr[256];
+
+ total_len = qemu_get_be64(f);
+ end_pos = total_len + qemu_ftell(f);
+ for(;;) {
+ if (qemu_ftell(f) >= end_pos)
+ break;
+ len = qemu_get_byte(f);
+ qemu_get_buffer(f, (uint8_t *)idstr, len);
+ idstr[len] = '\0';
+ instance_id = qemu_get_be32(f);
+ version_id = qemu_get_be32(f);
+ record_len = qemu_get_be32(f);
+ cur_pos = qemu_ftell(f);
+ se = find_se(idstr, instance_id);
+ if (!se) {
+ fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
+ instance_id, idstr);
+ } else {
+ ret = se->load_state(f, se->opaque, version_id);
+ if (ret < 0) {
+ fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
+ instance_id, idstr);
+ }
+ }
+ /* always seek to exact end of record */
+ qemu_fseek(f, cur_pos + record_len, SEEK_SET);
+ }
+
+ if (qemu_file_has_error(f))
+ return -EIO;
+
+ return 0;
+}
+
+int qemu_loadvm_state(QEMUFile *f)
+{
+ LoadStateEntry *first_le = NULL;
+ uint8_t section_type;
+ unsigned int v;
+ int ret;
+
+ v = qemu_get_be32(f);
+ if (v != QEMU_VM_FILE_MAGIC)
+ return -EINVAL;
+
+ v = qemu_get_be32(f);
+ if (v == QEMU_VM_FILE_VERSION_COMPAT)
+ return qemu_loadvm_state_v2(f);
+ if (v != QEMU_VM_FILE_VERSION)
+ return -ENOTSUP;
+
+ while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
+ uint32_t instance_id, version_id, section_id;
+ LoadStateEntry *le;
+ SaveStateEntry *se;
+ char idstr[257];
+ int len;
+
+ switch (section_type) {
+ case QEMU_VM_SECTION_START:
+ case QEMU_VM_SECTION_FULL:
+ /* Read section start */
+ section_id = qemu_get_be32(f);
+ len = qemu_get_byte(f);
+ qemu_get_buffer(f, (uint8_t *)idstr, len);
+ idstr[len] = 0;
+ instance_id = qemu_get_be32(f);
+ version_id = qemu_get_be32(f);
+
+ /* Find savevm section */
+ se = find_se(idstr, instance_id);
+ if (se == NULL) {
+ fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Validate version */
+ if (version_id > se->version_id) {
+ fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
+ version_id, idstr, se->version_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Add entry */
+ le = qemu_mallocz(sizeof(*le));
+ if (le == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ le->se = se;
+ le->section_id = section_id;
+ le->version_id = version_id;
+ le->next = first_le;
+ first_le = le;
+
+ le->se->load_state(f, le->se->opaque, le->version_id);
+ break;
+ case QEMU_VM_SECTION_PART:
+ case QEMU_VM_SECTION_END:
+ section_id = qemu_get_be32(f);
+
+ for (le = first_le; le && le->section_id != section_id; le = le->next);
+ if (le == NULL) {
+ fprintf(stderr, "Unknown savevm section %d\n", section_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ le->se->load_state(f, le->se->opaque, le->version_id);
+ break;
+ default:
+ fprintf(stderr, "Unknown savevm section type %d\n", section_type);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ ret = 0;
+
+out:
+ while (first_le) {
+ LoadStateEntry *le = first_le;
+ first_le = first_le->next;
+ qemu_free(le);
+ }
+
+ if (qemu_file_has_error(f))
+ ret = -EIO;
+
+ return ret;
+}
+
+/* device can contain snapshots */
+static int bdrv_can_snapshot(BlockDriverState *bs)
+{
+ return (bs &&
+ !bdrv_is_removable(bs) &&
+ !bdrv_is_read_only(bs));
+}
+
+/* device must be snapshots in order to have a reliable snapshot */
+static int bdrv_has_snapshot(BlockDriverState *bs)
+{
+ return (bs &&
+ !bdrv_is_removable(bs) &&
+ !bdrv_is_read_only(bs));
+}
+
+static BlockDriverState *get_bs_snapshots(void)
+{
+ BlockDriverState *bs;
+ int i;
+
+ if (bs_snapshots)
+ return bs_snapshots;
+ for(i = 0; i <= nb_drives; i++) {
+ bs = drives_table[i].bdrv;
+ if (bdrv_can_snapshot(bs))
+ goto ok;
+ }
+ return NULL;
+ ok:
+ bs_snapshots = bs;
+ return bs;
+}
+
+static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
+ const char *name)
+{
+ 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;
+ }
+ }
+ qemu_free(sn_tab);
+ return ret;
+}
+
+void do_savevm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
+ int must_delete, ret, i;
+ BlockDriverInfo bdi1, *bdi = &bdi1;
+ QEMUFile *f;
+ int saved_vm_running;
+#ifdef _WIN32
+ struct _timeb tb;
+#else
+ struct timeval tv;
+#endif
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device can accept snapshots\n");
+ return;
+ }
+
+ /* ??? Should this occur after vm_stop? */
+ qemu_aio_flush();
+
+ saved_vm_running = vm_running;
+ vm_stop(0);
+
+ must_delete = 0;
+ if (name) {
+ ret = bdrv_snapshot_find(bs, old_sn, name);
+ if (ret >= 0) {
+ must_delete = 1;
+ }
+ }
+ memset(sn, 0, sizeof(*sn));
+ if (must_delete) {
+ pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
+ pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
+ } else {
+ if (name)
+ pstrcpy(sn->name, sizeof(sn->name), name);
+ }
+
+ /* fill auxiliary fields */
+#ifdef _WIN32
+ _ftime(&tb);
+ sn->date_sec = tb.time;
+ sn->date_nsec = tb.millitm * 1000000;
+#else
+ gettimeofday(&tv, NULL);
+ sn->date_sec = tv.tv_sec;
+ sn->date_nsec = tv.tv_usec * 1000;
+#endif
+ sn->vm_clock_nsec = qemu_get_clock(vm_clock);
+
+ if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
+ term_printf("Device %s does not support VM state snapshots\n",
+ bdrv_get_device_name(bs));
+ goto the_end;
+ }
+
+ /* save the VM state */
+ f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
+ if (!f) {
+ term_printf("Could not open VM state file\n");
+ goto the_end;
+ }
+ ret = qemu_savevm_state(f);
+ sn->vm_state_size = qemu_ftell(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ term_printf("Error %d while writing VM\n", ret);
+ goto the_end;
+ }
+
+ /* create the snapshots */
+
+ for(i = 0; i < nb_drives; i++) {
+ bs1 = drives_table[i].bdrv;
+ if (bdrv_has_snapshot(bs1)) {
+ if (must_delete) {
+ ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
+ if (ret < 0) {
+ term_printf("Error while deleting snapshot on '%s'\n",
+ bdrv_get_device_name(bs1));
+ }
+ }
+ ret = bdrv_snapshot_create(bs1, sn);
+ if (ret < 0) {
+ term_printf("Error while creating snapshot on '%s'\n",
+ bdrv_get_device_name(bs1));
+ }
+ }
+ }
+
+ the_end:
+ if (saved_vm_running)
+ vm_start();
+}
+
+void do_loadvm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ BlockDriverInfo bdi1, *bdi = &bdi1;
+ QEMUFile *f;
+ int i, ret;
+ int saved_vm_running;
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device supports snapshots\n");
+ return;
+ }
+
+ /* Flush all IO requests so they don't interfere with the new state. */
+ qemu_aio_flush();
+
+ saved_vm_running = vm_running;
+ vm_stop(0);
+
+ for(i = 0; i <= nb_drives; i++) {
+ bs1 = drives_table[i].bdrv;
+ if (bdrv_has_snapshot(bs1)) {
+ ret = bdrv_snapshot_goto(bs1, name);
+ if (ret < 0) {
+ if (bs != bs1)
+ term_printf("Warning: ");
+ switch(ret) {
+ case -ENOTSUP:
+ term_printf("Snapshots not supported on device '%s'\n",
+ bdrv_get_device_name(bs1));
+ break;
+ case -ENOENT:
+ term_printf("Could not find snapshot '%s' on device '%s'\n",
+ name, bdrv_get_device_name(bs1));
+ break;
+ default:
+ term_printf("Error %d while activating snapshot on '%s'\n",
+ ret, bdrv_get_device_name(bs1));
+ break;
+ }
+ /* fatal on snapshot block device */
+ if (bs == bs1)
+ goto the_end;
+ }
+ }
+ }
+
+ if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
+ term_printf("Device %s does not support VM state snapshots\n",
+ bdrv_get_device_name(bs));
+ return;
+ }
+
+ /* restore the VM state */
+ f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
+ if (!f) {
+ term_printf("Could not open VM state file\n");
+ goto the_end;
+ }
+ ret = qemu_loadvm_state(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ term_printf("Error %d while loading VM state\n", ret);
+ }
+ the_end:
+ if (saved_vm_running)
+ vm_start();
+}
+
+void do_delvm(const char *name)
+{
+ BlockDriverState *bs, *bs1;
+ int i, ret;
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No block device supports snapshots\n");
+ return;
+ }
+
+ for(i = 0; i <= nb_drives; i++) {
+ bs1 = drives_table[i].bdrv;
+ if (bdrv_has_snapshot(bs1)) {
+ ret = bdrv_snapshot_delete(bs1, name);
+ if (ret < 0) {
+ if (ret == -ENOTSUP)
+ term_printf("Snapshots not supported on device '%s'\n",
+ bdrv_get_device_name(bs1));
+ else
+ term_printf("Error %d while deleting snapshot on '%s'\n",
+ ret, bdrv_get_device_name(bs1));
+ }
+ }
+ }
+}
+
+void do_info_snapshots(void)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo *sn_tab, *sn;
+ int nb_sns, i;
+ char buf[256];
+
+ bs = get_bs_snapshots();
+ if (!bs) {
+ term_printf("No available block device supports snapshots\n");
+ return;
+ }
+ term_printf("Snapshot devices:");
+ for(i = 0; i <= nb_drives; i++) {
+ bs1 = drives_table[i].bdrv;
+ if (bdrv_has_snapshot(bs1)) {
+ if (bs == bs1)
+ term_printf(" %s", bdrv_get_device_name(bs1));
+ }
+ }
+ term_printf("\n");
+
+ nb_sns = bdrv_snapshot_list(bs, &sn_tab);
+ if (nb_sns < 0) {
+ term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
+ return;
+ }
+ term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
+ term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
+ for(i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
+ }
+ qemu_free(sn_tab);
+}
to store the VM snapshots */
DriveInfo drives_table[MAX_DRIVES+1];
int nb_drives;
-/* point to the block driver where the snapshots are managed */
-static BlockDriverState *bs_snapshots;
static int vga_ram_size;
enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
DisplayState display_state;
}
#endif
-#define SELF_ANNOUNCE_ROUNDS 5
-#define ETH_P_EXPERIMENTAL 0x01F1 /* just a number */
-//#define ETH_P_EXPERIMENTAL 0x0012 /* make it the size of the packet */
-#define EXPERIMENTAL_MAGIC 0xf1f23f4f
-
-static int announce_self_create(uint8_t *buf,
- uint8_t *mac_addr)
-{
- uint32_t magic = EXPERIMENTAL_MAGIC;
- uint16_t proto = htons(ETH_P_EXPERIMENTAL);
-
- /* FIXME: should we send a different packet (arp/rarp/ping)? */
-
- memset(buf, 0xff, 6); /* h_dst */
- memcpy(buf + 6, mac_addr, 6); /* h_src */
- memcpy(buf + 12, &proto, 2); /* h_proto */
- memcpy(buf + 14, &magic, 4); /* magic */
-
- return 18; /* len */
-}
-
-void qemu_announce_self(void)
-{
- int i, j, len;
- VLANState *vlan;
- VLANClientState *vc;
- uint8_t buf[256];
-
- for (i = 0; i < nb_nics; i++) {
- len = announce_self_create(buf, nd_table[i].macaddr);
- vlan = nd_table[i].vlan;
- for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
- for (j=0; j < SELF_ANNOUNCE_ROUNDS; j++)
- vc->fd_read(vc->opaque, buf, len);
- }
- }
-}
-
-/***********************************************************/
-/* savevm/loadvm support */
-
-#define IO_BUF_SIZE 32768
-
-struct QEMUFile {
- QEMUFilePutBufferFunc *put_buffer;
- QEMUFileGetBufferFunc *get_buffer;
- QEMUFileCloseFunc *close;
- QEMUFileRateLimit *rate_limit;
- void *opaque;
- int is_write;
-
- int64_t buf_offset; /* 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];
-
- int has_error;
-};
-
-typedef struct QEMUFilePopen
-{
- FILE *popen_file;
- QEMUFile *file;
-} QEMUFilePopen;
-
-typedef struct QEMUFileSocket
-{
- int fd;
- QEMUFile *file;
-} QEMUFileSocket;
-
-static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
-{
- QEMUFileSocket *s = opaque;
- ssize_t len;
-
- do {
- len = recv(s->fd, buf, size, 0);
- } while (len == -1 && socket_error() == EINTR);
-
- if (len == -1)
- len = -socket_error();
-
- return len;
-}
-
-static int socket_close(void *opaque)
-{
- QEMUFileSocket *s = opaque;
- qemu_free(s);
- return 0;
-}
-
-static int popen_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size)
-{
- QEMUFilePopen *s = opaque;
- return fwrite(buf, 1, size, s->popen_file);
-}
-
-static int popen_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
-{
- QEMUFilePopen *s = opaque;
- return fread(buf, 1, size, s->popen_file);
-}
-
-static int popen_close(void *opaque)
-{
- QEMUFilePopen *s = opaque;
- pclose(s->popen_file);
- qemu_free(s);
- return 0;
-}
-
-QEMUFile *qemu_popen(FILE *popen_file, const char *mode)
-{
- QEMUFilePopen *s;
-
- if (popen_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
- fprintf(stderr, "qemu_popen: Argument validity check failed\n");
- return NULL;
- }
-
- s = qemu_mallocz(sizeof(QEMUFilePopen));
- if (!s) {
- fprintf(stderr, "qemu_popen: malloc failed\n");
- return NULL;
- }
-
- s->popen_file = popen_file;
-
- if(mode[0] == 'r') {
- s->file = qemu_fopen_ops(s, NULL, popen_get_buffer, popen_close, NULL);
- } else {
- s->file = qemu_fopen_ops(s, popen_put_buffer, NULL, popen_close, NULL);
- }
- fprintf(stderr, "qemu_popen: returning result of qemu_fopen_ops\n");
- return s->file;
-}
-
-QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
-{
- FILE *popen_file;
-
- popen_file = popen(command, mode);
- if(popen_file == NULL) {
- return NULL;
- }
-
- return qemu_popen(popen_file, mode);
-}
-
-QEMUFile *qemu_fopen_socket(int fd)
-{
- QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
-
- if (s == NULL)
- return NULL;
-
- s->fd = fd;
- s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close, NULL);
- return s->file;
-}
-
-typedef struct QEMUFileStdio
-{
- FILE *outfile;
-} QEMUFileStdio;
-
-static int file_put_buffer(void *opaque, const uint8_t *buf,
- int64_t pos, int size)
-{
- QEMUFileStdio *s = opaque;
- fseek(s->outfile, pos, SEEK_SET);
- fwrite(buf, 1, size, s->outfile);
- return size;
-}
-
-static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
-{
- QEMUFileStdio *s = opaque;
- fseek(s->outfile, pos, SEEK_SET);
- return fread(buf, 1, size, s->outfile);
-}
-
-static int file_close(void *opaque)
-{
- QEMUFileStdio *s = opaque;
- fclose(s->outfile);
- qemu_free(s);
- return 0;
-}
-
-QEMUFile *qemu_fopen(const char *filename, const char *mode)
-{
- QEMUFileStdio *s;
-
- s = qemu_mallocz(sizeof(QEMUFileStdio));
- if (!s)
- return NULL;
-
- s->outfile = fopen(filename, mode);
- if (!s->outfile)
- goto fail;
-
- if (!strcmp(mode, "wb"))
- return qemu_fopen_ops(s, file_put_buffer, NULL, file_close, NULL);
- else if (!strcmp(mode, "rb"))
- return qemu_fopen_ops(s, NULL, file_get_buffer, file_close, NULL);
-
-fail:
- if (s->outfile)
- fclose(s->outfile);
- qemu_free(s);
- return NULL;
-}
-
-typedef struct QEMUFileBdrv
-{
- BlockDriverState *bs;
- int64_t base_offset;
-} QEMUFileBdrv;
-
-static int bdrv_put_buffer(void *opaque, const uint8_t *buf,
- int64_t pos, int size)
-{
- QEMUFileBdrv *s = opaque;
- bdrv_pwrite(s->bs, s->base_offset + pos, buf, size);
- return size;
-}
-
-static int bdrv_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
-{
- QEMUFileBdrv *s = opaque;
- return bdrv_pread(s->bs, s->base_offset + pos, buf, size);
-}
-
-static int bdrv_fclose(void *opaque)
-{
- QEMUFileBdrv *s = opaque;
- qemu_free(s);
- return 0;
-}
-
-static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int64_t offset, int is_writable)
-{
- QEMUFileBdrv *s;
-
- s = qemu_mallocz(sizeof(QEMUFileBdrv));
- if (!s)
- return NULL;
-
- s->bs = bs;
- s->base_offset = offset;
-
- if (is_writable)
- return qemu_fopen_ops(s, bdrv_put_buffer, NULL, bdrv_fclose, NULL);
-
- return qemu_fopen_ops(s, NULL, bdrv_get_buffer, bdrv_fclose, NULL);
-}
-
-QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
- QEMUFileGetBufferFunc *get_buffer,
- QEMUFileCloseFunc *close,
- QEMUFileRateLimit *rate_limit)
-{
- QEMUFile *f;
-
- f = qemu_mallocz(sizeof(QEMUFile));
- if (!f)
- return NULL;
-
- f->opaque = opaque;
- f->put_buffer = put_buffer;
- f->get_buffer = get_buffer;
- f->close = close;
- f->rate_limit = rate_limit;
- f->is_write = 0;
-
- return f;
-}
-
-int qemu_file_has_error(QEMUFile *f)
-{
- return f->has_error;
-}
-
-void qemu_fflush(QEMUFile *f)
-{
- if (!f->put_buffer)
- return;
-
- if (f->is_write && f->buf_index > 0) {
- int len;
-
- len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index);
- if (len > 0)
- f->buf_offset += f->buf_index;
- else
- f->has_error = 1;
- f->buf_index = 0;
- }
-}
-
-static void qemu_fill_buffer(QEMUFile *f)
-{
- int len;
-
- if (!f->get_buffer)
- return;
-
- if (f->is_write)
- abort();
-
- len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
- if (len > 0) {
- f->buf_index = 0;
- f->buf_size = len;
- f->buf_offset += len;
- } else if (len != -EAGAIN)
- f->has_error = 1;
-}
-
-int qemu_fclose(QEMUFile *f)
-{
- int ret = 0;
- qemu_fflush(f);
- if (f->close)
- ret = f->close(f->opaque);
- qemu_free(f);
- return ret;
-}
-
-void qemu_file_put_notify(QEMUFile *f)
-{
- f->put_buffer(f->opaque, NULL, 0, 0);
-}
-
-void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
-{
- int l;
-
- if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
- fprintf(stderr,
- "Attempted to write to buffer while read buffer is not empty\n");
- abort();
- }
-
- while (!f->has_error && 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->buf_index += l;
- buf += l;
- size -= l;
- if (f->buf_index >= IO_BUF_SIZE)
- qemu_fflush(f);
- }
-}
-
-void qemu_put_byte(QEMUFile *f, int v)
-{
- if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
- fprintf(stderr,
- "Attempted to write to buffer while read buffer is not empty\n");
- abort();
- }
-
- f->buf[f->buf_index++] = v;
- f->is_write = 1;
- if (f->buf_index >= IO_BUF_SIZE)
- qemu_fflush(f);
-}
-
-int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
-{
- int size, l;
-
- if (f->is_write)
- abort();
-
- size = size1;
- while (size > 0) {
- l = f->buf_size - f->buf_index;
- if (l == 0) {
- qemu_fill_buffer(f);
- l = f->buf_size - f->buf_index;
- if (l == 0)
- break;
- }
- if (l > size)
- l = size;
- memcpy(buf, f->buf + f->buf_index, l);
- f->buf_index += l;
- buf += l;
- size -= l;
- }
- return size1 - size;
-}
-
-int qemu_get_byte(QEMUFile *f)
-{
- if (f->is_write)
- abort();
-
- if (f->buf_index >= f->buf_size) {
- qemu_fill_buffer(f);
- if (f->buf_index >= f->buf_size)
- return 0;
- }
- return f->buf[f->buf_index++];
-}
-
-int64_t qemu_ftell(QEMUFile *f)
-{
- return f->buf_offset - f->buf_size + f->buf_index;
-}
-
-int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
-{
- if (whence == SEEK_SET) {
- /* nothing to do */
- } else if (whence == SEEK_CUR) {
- pos += qemu_ftell(f);
- } else {
- /* SEEK_END not supported */
- 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;
- }
- return pos;
-}
-
-int qemu_file_rate_limit(QEMUFile *f)
-{
- if (f->rate_limit)
- return f->rate_limit(f->opaque);
-
- return 0;
-}
-
-void qemu_put_be16(QEMUFile *f, unsigned int v)
-{
- qemu_put_byte(f, v >> 8);
- qemu_put_byte(f, v);
-}
-
-void qemu_put_be32(QEMUFile *f, unsigned int v)
-{
- qemu_put_byte(f, v >> 24);
- qemu_put_byte(f, v >> 16);
- qemu_put_byte(f, v >> 8);
- qemu_put_byte(f, v);
-}
-
-void qemu_put_be64(QEMUFile *f, uint64_t v)
-{
- qemu_put_be32(f, v >> 32);
- qemu_put_be32(f, v);
-}
-
-unsigned int qemu_get_be16(QEMUFile *f)
-{
- unsigned int v;
- v = qemu_get_byte(f) << 8;
- v |= qemu_get_byte(f);
- return v;
-}
-
-unsigned int qemu_get_be32(QEMUFile *f)
-{
- unsigned int v;
- v = qemu_get_byte(f) << 24;
- v |= qemu_get_byte(f) << 16;
- v |= qemu_get_byte(f) << 8;
- v |= qemu_get_byte(f);
- return v;
-}
-
-uint64_t qemu_get_be64(QEMUFile *f)
-{
- uint64_t v;
- v = (uint64_t)qemu_get_be32(f) << 32;
- v |= qemu_get_be32(f);
- return v;
-}
-
-typedef struct SaveStateEntry {
- char idstr[256];
- int instance_id;
- int version_id;
- int section_id;
- SaveLiveStateHandler *save_live_state;
- SaveStateHandler *save_state;
- LoadStateHandler *load_state;
- void *opaque;
- struct SaveStateEntry *next;
-} SaveStateEntry;
-
-static SaveStateEntry *first_se;
-
-/* TODO: Individual devices generally have very little idea about the rest
- of the system, so instance_id should be removed/replaced.
- Meanwhile pass -1 as instance_id if you do not already have a clearly
- distinguishing id for all instances of your device class. */
-int register_savevm_live(const char *idstr,
- int instance_id,
- int version_id,
- SaveLiveStateHandler *save_live_state,
- SaveStateHandler *save_state,
- LoadStateHandler *load_state,
- void *opaque)
-{
- SaveStateEntry *se, **pse;
- static int global_section_id;
-
- se = qemu_malloc(sizeof(SaveStateEntry));
- if (!se)
- return -1;
- pstrcpy(se->idstr, sizeof(se->idstr), idstr);
- se->instance_id = (instance_id == -1) ? 0 : instance_id;
- se->version_id = version_id;
- se->section_id = global_section_id++;
- se->save_live_state = save_live_state;
- se->save_state = save_state;
- se->load_state = load_state;
- se->opaque = opaque;
- se->next = NULL;
-
- /* add at the end of list */
- pse = &first_se;
- while (*pse != NULL) {
- if (instance_id == -1
- && strcmp(se->idstr, (*pse)->idstr) == 0
- && se->instance_id <= (*pse)->instance_id)
- se->instance_id = (*pse)->instance_id + 1;
- pse = &(*pse)->next;
- }
- *pse = se;
- return 0;
-}
-
-int register_savevm(const char *idstr,
- int instance_id,
- int version_id,
- SaveStateHandler *save_state,
- LoadStateHandler *load_state,
- void *opaque)
-{
- return register_savevm_live(idstr, instance_id, version_id,
- NULL, save_state, load_state, opaque);
-}
-
-#define QEMU_VM_FILE_MAGIC 0x5145564d
-#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
-#define QEMU_VM_FILE_VERSION 0x00000003
-
-#define QEMU_VM_EOF 0x00
-#define QEMU_VM_SECTION_START 0x01
-#define QEMU_VM_SECTION_PART 0x02
-#define QEMU_VM_SECTION_END 0x03
-#define QEMU_VM_SECTION_FULL 0x04
-
-int qemu_savevm_state_begin(QEMUFile *f)
-{
- SaveStateEntry *se;
-
- qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
- qemu_put_be32(f, QEMU_VM_FILE_VERSION);
-
- for (se = first_se; se != NULL; se = se->next) {
- int len;
-
- if (se->save_live_state == NULL)
- continue;
-
- /* Section type */
- qemu_put_byte(f, QEMU_VM_SECTION_START);
- 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);
-
- se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
- }
-
- if (qemu_file_has_error(f))
- return -EIO;
-
- return 0;
-}
-
-int qemu_savevm_state_iterate(QEMUFile *f)
-{
- SaveStateEntry *se;
- int ret = 1;
-
- for (se = first_se; se != NULL; se = se->next) {
- if (se->save_live_state == NULL)
- continue;
-
- /* Section type */
- qemu_put_byte(f, QEMU_VM_SECTION_PART);
- qemu_put_be32(f, se->section_id);
-
- ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
- }
-
- if (ret)
- return 1;
-
- if (qemu_file_has_error(f))
- return -EIO;
-
- return 0;
-}
-
-int qemu_savevm_state_complete(QEMUFile *f)
-{
- SaveStateEntry *se;
-
- for (se = first_se; se != NULL; se = se->next) {
- if (se->save_live_state == NULL)
- continue;
-
- /* Section type */
- qemu_put_byte(f, QEMU_VM_SECTION_END);
- qemu_put_be32(f, se->section_id);
-
- se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
- }
-
- for(se = first_se; se != NULL; se = se->next) {
- int len;
-
- if (se->save_state == NULL)
- 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);
-
- se->save_state(f, se->opaque);
- }
-
- qemu_put_byte(f, QEMU_VM_EOF);
-
- if (qemu_file_has_error(f))
- return -EIO;
-
- return 0;
-}
-
-int qemu_savevm_state(QEMUFile *f)
-{
- int saved_vm_running;
- int ret;
-
- saved_vm_running = vm_running;
- vm_stop(0);
-
- bdrv_flush_all();
-
- ret = qemu_savevm_state_begin(f);
- if (ret < 0)
- goto out;
-
- do {
- ret = qemu_savevm_state_iterate(f);
- if (ret < 0)
- goto out;
- } while (ret == 0);
-
- ret = qemu_savevm_state_complete(f);
-
-out:
- if (qemu_file_has_error(f))
- ret = -EIO;
-
- if (!ret && saved_vm_running)
- vm_start();
-
- return ret;
-}
-
-static SaveStateEntry *find_se(const char *idstr, int instance_id)
-{
- SaveStateEntry *se;
-
- for(se = first_se; se != NULL; se = se->next) {
- if (!strcmp(se->idstr, idstr) &&
- instance_id == se->instance_id)
- return se;
- }
- return NULL;
-}
-
-typedef struct LoadStateEntry {
- SaveStateEntry *se;
- int section_id;
- int version_id;
- struct LoadStateEntry *next;
-} LoadStateEntry;
-
-static int qemu_loadvm_state_v2(QEMUFile *f)
-{
- SaveStateEntry *se;
- int len, ret, instance_id, record_len, version_id;
- int64_t total_len, end_pos, cur_pos;
- char idstr[256];
-
- total_len = qemu_get_be64(f);
- end_pos = total_len + qemu_ftell(f);
- for(;;) {
- if (qemu_ftell(f) >= end_pos)
- break;
- len = qemu_get_byte(f);
- qemu_get_buffer(f, (uint8_t *)idstr, len);
- idstr[len] = '\0';
- instance_id = qemu_get_be32(f);
- version_id = qemu_get_be32(f);
- record_len = qemu_get_be32(f);
- cur_pos = qemu_ftell(f);
- se = find_se(idstr, instance_id);
- if (!se) {
- fprintf(stderr, "qemu: warning: instance 0x%x of device '%s' not present in current VM\n",
- instance_id, idstr);
- } else {
- ret = se->load_state(f, se->opaque, version_id);
- if (ret < 0) {
- fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
- instance_id, idstr);
- }
- }
- /* always seek to exact end of record */
- qemu_fseek(f, cur_pos + record_len, SEEK_SET);
- }
-
- if (qemu_file_has_error(f))
- return -EIO;
-
- return 0;
-}
-
-int qemu_loadvm_state(QEMUFile *f)
-{
- LoadStateEntry *first_le = NULL;
- uint8_t section_type;
- unsigned int v;
- int ret;
-
- v = qemu_get_be32(f);
- if (v != QEMU_VM_FILE_MAGIC)
- return -EINVAL;
-
- v = qemu_get_be32(f);
- if (v == QEMU_VM_FILE_VERSION_COMPAT)
- return qemu_loadvm_state_v2(f);
- if (v != QEMU_VM_FILE_VERSION)
- return -ENOTSUP;
-
- while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
- uint32_t instance_id, version_id, section_id;
- LoadStateEntry *le;
- SaveStateEntry *se;
- char idstr[257];
- int len;
-
- switch (section_type) {
- case QEMU_VM_SECTION_START:
- case QEMU_VM_SECTION_FULL:
- /* Read section start */
- section_id = qemu_get_be32(f);
- len = qemu_get_byte(f);
- qemu_get_buffer(f, (uint8_t *)idstr, len);
- idstr[len] = 0;
- instance_id = qemu_get_be32(f);
- version_id = qemu_get_be32(f);
-
- /* Find savevm section */
- se = find_se(idstr, instance_id);
- if (se == NULL) {
- fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
- ret = -EINVAL;
- goto out;
- }
-
- /* Validate version */
- if (version_id > se->version_id) {
- fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
- version_id, idstr, se->version_id);
- ret = -EINVAL;
- goto out;
- }
-
- /* Add entry */
- le = qemu_mallocz(sizeof(*le));
- if (le == NULL) {
- ret = -ENOMEM;
- goto out;
- }
-
- le->se = se;
- le->section_id = section_id;
- le->version_id = version_id;
- le->next = first_le;
- first_le = le;
-
- le->se->load_state(f, le->se->opaque, le->version_id);
- break;
- case QEMU_VM_SECTION_PART:
- case QEMU_VM_SECTION_END:
- section_id = qemu_get_be32(f);
-
- for (le = first_le; le && le->section_id != section_id; le = le->next);
- if (le == NULL) {
- fprintf(stderr, "Unknown savevm section %d\n", section_id);
- ret = -EINVAL;
- goto out;
- }
-
- le->se->load_state(f, le->se->opaque, le->version_id);
- break;
- default:
- fprintf(stderr, "Unknown savevm section type %d\n", section_type);
- ret = -EINVAL;
- goto out;
- }
- }
-
- ret = 0;
-
-out:
- while (first_le) {
- LoadStateEntry *le = first_le;
- first_le = first_le->next;
- qemu_free(le);
- }
-
- if (qemu_file_has_error(f))
- ret = -EIO;
-
- return ret;
-}
-
-/* device can contain snapshots */
-static int bdrv_can_snapshot(BlockDriverState *bs)
-{
- return (bs &&
- !bdrv_is_removable(bs) &&
- !bdrv_is_read_only(bs));
-}
-
-/* device must be snapshots in order to have a reliable snapshot */
-static int bdrv_has_snapshot(BlockDriverState *bs)
-{
- return (bs &&
- !bdrv_is_removable(bs) &&
- !bdrv_is_read_only(bs));
-}
-
-static BlockDriverState *get_bs_snapshots(void)
-{
- BlockDriverState *bs;
- int i;
-
- if (bs_snapshots)
- return bs_snapshots;
- for(i = 0; i <= nb_drives; i++) {
- bs = drives_table[i].bdrv;
- if (bdrv_can_snapshot(bs))
- goto ok;
- }
- return NULL;
- ok:
- bs_snapshots = bs;
- return bs;
-}
-
-static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
- const char *name)
-{
- 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;
- }
- }
- qemu_free(sn_tab);
- return ret;
-}
-
-void do_savevm(const char *name)
-{
- BlockDriverState *bs, *bs1;
- QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
- int must_delete, ret, i;
- BlockDriverInfo bdi1, *bdi = &bdi1;
- QEMUFile *f;
- int saved_vm_running;
-#ifdef _WIN32
- struct _timeb tb;
-#else
- struct timeval tv;
-#endif
-
- bs = get_bs_snapshots();
- if (!bs) {
- term_printf("No block device can accept snapshots\n");
- return;
- }
-
- /* ??? Should this occur after vm_stop? */
- qemu_aio_flush();
-
- saved_vm_running = vm_running;
- vm_stop(0);
-
- must_delete = 0;
- if (name) {
- ret = bdrv_snapshot_find(bs, old_sn, name);
- if (ret >= 0) {
- must_delete = 1;
- }
- }
- memset(sn, 0, sizeof(*sn));
- if (must_delete) {
- pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
- pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
- } else {
- if (name)
- pstrcpy(sn->name, sizeof(sn->name), name);
- }
-
- /* fill auxiliary fields */
-#ifdef _WIN32
- _ftime(&tb);
- sn->date_sec = tb.time;
- sn->date_nsec = tb.millitm * 1000000;
-#else
- gettimeofday(&tv, NULL);
- sn->date_sec = tv.tv_sec;
- sn->date_nsec = tv.tv_usec * 1000;
-#endif
- sn->vm_clock_nsec = qemu_get_clock(vm_clock);
-
- if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
- term_printf("Device %s does not support VM state snapshots\n",
- bdrv_get_device_name(bs));
- goto the_end;
- }
-
- /* save the VM state */
- f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 1);
- if (!f) {
- term_printf("Could not open VM state file\n");
- goto the_end;
- }
- ret = qemu_savevm_state(f);
- sn->vm_state_size = qemu_ftell(f);
- qemu_fclose(f);
- if (ret < 0) {
- term_printf("Error %d while writing VM\n", ret);
- goto the_end;
- }
-
- /* create the snapshots */
-
- for(i = 0; i < nb_drives; i++) {
- bs1 = drives_table[i].bdrv;
- if (bdrv_has_snapshot(bs1)) {
- if (must_delete) {
- ret = bdrv_snapshot_delete(bs1, old_sn->id_str);
- if (ret < 0) {
- term_printf("Error while deleting snapshot on '%s'\n",
- bdrv_get_device_name(bs1));
- }
- }
- ret = bdrv_snapshot_create(bs1, sn);
- if (ret < 0) {
- term_printf("Error while creating snapshot on '%s'\n",
- bdrv_get_device_name(bs1));
- }
- }
- }
-
- the_end:
- if (saved_vm_running)
- vm_start();
-}
-
-void do_loadvm(const char *name)
-{
- BlockDriverState *bs, *bs1;
- BlockDriverInfo bdi1, *bdi = &bdi1;
- QEMUFile *f;
- int i, ret;
- int saved_vm_running;
-
- bs = get_bs_snapshots();
- if (!bs) {
- term_printf("No block device supports snapshots\n");
- return;
- }
-
- /* Flush all IO requests so they don't interfere with the new state. */
- qemu_aio_flush();
-
- saved_vm_running = vm_running;
- vm_stop(0);
-
- for(i = 0; i <= nb_drives; i++) {
- bs1 = drives_table[i].bdrv;
- if (bdrv_has_snapshot(bs1)) {
- ret = bdrv_snapshot_goto(bs1, name);
- if (ret < 0) {
- if (bs != bs1)
- term_printf("Warning: ");
- switch(ret) {
- case -ENOTSUP:
- term_printf("Snapshots not supported on device '%s'\n",
- bdrv_get_device_name(bs1));
- break;
- case -ENOENT:
- term_printf("Could not find snapshot '%s' on device '%s'\n",
- name, bdrv_get_device_name(bs1));
- break;
- default:
- term_printf("Error %d while activating snapshot on '%s'\n",
- ret, bdrv_get_device_name(bs1));
- break;
- }
- /* fatal on snapshot block device */
- if (bs == bs1)
- goto the_end;
- }
- }
- }
-
- if (bdrv_get_info(bs, bdi) < 0 || bdi->vm_state_offset <= 0) {
- term_printf("Device %s does not support VM state snapshots\n",
- bdrv_get_device_name(bs));
- return;
- }
-
- /* restore the VM state */
- f = qemu_fopen_bdrv(bs, bdi->vm_state_offset, 0);
- if (!f) {
- term_printf("Could not open VM state file\n");
- goto the_end;
- }
- ret = qemu_loadvm_state(f);
- qemu_fclose(f);
- if (ret < 0) {
- term_printf("Error %d while loading VM state\n", ret);
- }
- the_end:
- if (saved_vm_running)
- vm_start();
-}
-
-void do_delvm(const char *name)
-{
- BlockDriverState *bs, *bs1;
- int i, ret;
-
- bs = get_bs_snapshots();
- if (!bs) {
- term_printf("No block device supports snapshots\n");
- return;
- }
-
- for(i = 0; i <= nb_drives; i++) {
- bs1 = drives_table[i].bdrv;
- if (bdrv_has_snapshot(bs1)) {
- ret = bdrv_snapshot_delete(bs1, name);
- if (ret < 0) {
- if (ret == -ENOTSUP)
- term_printf("Snapshots not supported on device '%s'\n",
- bdrv_get_device_name(bs1));
- else
- term_printf("Error %d while deleting snapshot on '%s'\n",
- ret, bdrv_get_device_name(bs1));
- }
- }
- }
-}
-
-void do_info_snapshots(void)
-{
- BlockDriverState *bs, *bs1;
- QEMUSnapshotInfo *sn_tab, *sn;
- int nb_sns, i;
- char buf[256];
-
- bs = get_bs_snapshots();
- if (!bs) {
- term_printf("No available block device supports snapshots\n");
- return;
- }
- term_printf("Snapshot devices:");
- for(i = 0; i <= nb_drives; i++) {
- bs1 = drives_table[i].bdrv;
- if (bdrv_has_snapshot(bs1)) {
- if (bs == bs1)
- term_printf(" %s", bdrv_get_device_name(bs1));
- }
- }
- term_printf("\n");
-
- nb_sns = bdrv_snapshot_list(bs, &sn_tab);
- if (nb_sns < 0) {
- term_printf("bdrv_snapshot_list: error %d\n", nb_sns);
- return;
- }
- term_printf("Snapshot list (from %s):\n", bdrv_get_device_name(bs));
- term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
- for(i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- term_printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
- }
- qemu_free(sn_tab);
-}
-
/***********************************************************/
/* ram save/restore */
projects / sdk / emulator / qemu.git / commitdiff