| /* |
| * 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 "config-host.h" |
| #include "qemu-common.h" |
| #include "hw/hw.h" |
| #include "hw/qdev.h" |
| #include "net/net.h" |
| #include "monitor/monitor.h" |
| #include "sysemu/sysemu.h" |
| #include "qemu/timer.h" |
| #include "audio/audio.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" |
| |
| #define SELF_ANNOUNCE_ROUNDS 5 |
| |
| #ifndef ETH_P_RARP |
| #define ETH_P_RARP 0x8035 |
| #endif |
| #define ARP_HTYPE_ETH 0x0001 |
| #define ARP_PTYPE_IP 0x0800 |
| #define ARP_OP_REQUEST_REV 0x3 |
| |
| static int announce_self_create(uint8_t *buf, |
| uint8_t *mac_addr) |
| { |
| /* Ethernet header. */ |
| memset(buf, 0xff, 6); /* destination MAC addr */ |
| memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
| *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
| |
| /* RARP header. */ |
| *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
| *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
| *(buf + 18) = 6; /* hardware addr length (ethernet) */ |
| *(buf + 19) = 4; /* protocol addr length (IPv4) */ |
| *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
| memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
| memset(buf + 28, 0x00, 4); /* source protocol addr */ |
| memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
| memset(buf + 38, 0x00, 4); /* target protocol addr */ |
| |
| /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */ |
| memset(buf + 42, 0x00, 18); |
| |
| return 60; /* len (FCS will be added by hardware) */ |
| } |
| |
| static void qemu_announce_self_iter(NICState *nic, void *opaque) |
| { |
| uint8_t buf[60]; |
| int len; |
| |
| len = announce_self_create(buf, nic->conf->macaddr.a); |
| |
| qemu_send_packet_raw(qemu_get_queue(nic), buf, len); |
| } |
| |
| |
| static void qemu_announce_self_once(void *opaque) |
| { |
| static int count = SELF_ANNOUNCE_ROUNDS; |
| QEMUTimer *timer = *(QEMUTimer **)opaque; |
| |
| qemu_foreach_nic(qemu_announce_self_iter, NULL); |
| |
| if (--count) { |
| /* delay 50ms, 150ms, 250ms, ... */ |
| qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
| 50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
| } else { |
| qemu_del_timer(timer); |
| qemu_free_timer(timer); |
| } |
| } |
| |
| void qemu_announce_self(void) |
| { |
| static QEMUTimer *timer; |
| timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
| qemu_announce_self_once(&timer); |
| } |
| |
| /***********************************************************/ |
| /* savevm/loadvm support */ |
| |
| #define IO_BUF_SIZE 32768 |
| |
| struct QEMUFile { |
| const QEMUFileOps *ops; |
| 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 last_error; |
| }; |
| |
| typedef struct QEMUFileStdio |
| { |
| FILE *stdio_file; |
| QEMUFile *file; |
| } QEMUFileStdio; |
| |
| typedef struct QEMUFileSocket |
| { |
| int fd; |
| QEMUFile *file; |
| } QEMUFileSocket; |
| |
| 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; |
| |
| for (;;) { |
| len = qemu_recv(s->fd, buf, size, 0); |
| if (len != -1) { |
| break; |
| } |
| if (socket_error() == EAGAIN) { |
| assert(qemu_in_coroutine()); |
| qemu_coroutine_yield(); |
| } else if (socket_error() != EINTR) { |
| break; |
| } |
| } |
| |
| if (len == -1) { |
| len = -socket_error(); |
| } |
| return len; |
| } |
| |
| static int socket_close(void *opaque) |
| { |
| QEMUFileSocket *s = opaque; |
| closesocket(s->fd); |
| g_free(s); |
| return 0; |
| } |
| |
| static int 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; |
| return fwrite(buf, 1, size, s->stdio_file); |
| } |
| |
| static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| { |
| QEMUFileStdio *s = opaque; |
| FILE *fp = s->stdio_file; |
| int bytes; |
| |
| for (;;) { |
| clearerr(fp); |
| bytes = fread(buf, 1, size, fp); |
| if (bytes != 0 || !ferror(fp)) { |
| break; |
| } |
| if (errno == EAGAIN) { |
| assert(qemu_in_coroutine()); |
| qemu_coroutine_yield(); |
| } else if (errno != EINTR) { |
| break; |
| } |
| } |
| return bytes; |
| } |
| |
| static int stdio_pclose(void *opaque) |
| { |
| QEMUFileStdio *s = opaque; |
| int ret; |
| ret = pclose(s->stdio_file); |
| if (ret == -1) { |
| ret = -errno; |
| } |
| g_free(s); |
| return ret; |
| } |
| |
| static int stdio_fclose(void *opaque) |
| { |
| QEMUFileStdio *s = opaque; |
| int ret = 0; |
| if (fclose(s->stdio_file) == EOF) { |
| ret = -errno; |
| } |
| g_free(s); |
| return ret; |
| } |
| |
| 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(FILE *stdio_file, const char *mode) |
| { |
| QEMUFileStdio *s; |
| |
| if (stdio_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 = g_malloc0(sizeof(QEMUFileStdio)); |
| |
| s->stdio_file = stdio_file; |
| |
| if(mode[0] == 'r') { |
| s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops); |
| } else { |
| s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops); |
| } |
| 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); |
| } |
| |
| 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 |
| }; |
| |
| QEMUFile *qemu_fdopen(int fd, const char *mode) |
| { |
| QEMUFileStdio *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_malloc0(sizeof(QEMUFileStdio)); |
| s->stdio_file = fdopen(fd, mode); |
| if (!s->stdio_file) |
| goto fail; |
| |
| if(mode[0] == 'r') { |
| s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
| } else { |
| s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
| } |
| return s->file; |
| |
| fail: |
| g_free(s); |
| return NULL; |
| } |
| |
| static const QEMUFileOps socket_read_ops = { |
| .get_fd = socket_get_fd, |
| .get_buffer = socket_get_buffer, |
| .close = socket_close |
| }; |
| |
| QEMUFile *qemu_fopen_socket(int fd) |
| { |
| QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket)); |
| |
| s->fd = fd; |
| s->file = qemu_fopen_ops(s, &socket_read_ops); |
| return s->file; |
| } |
| |
| QEMUFile *qemu_fopen(const char *filename, const char *mode) |
| { |
| QEMUFileStdio *s; |
| |
| 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 = g_malloc0(sizeof(QEMUFileStdio)); |
| |
| s->stdio_file = fopen(filename, mode); |
| if (!s->stdio_file) |
| goto fail; |
| |
| if(mode[0] == 'w') { |
| s->file = qemu_fopen_ops(s, &stdio_file_write_ops); |
| } else { |
| s->file = qemu_fopen_ops(s, &stdio_file_read_ops); |
| } |
| return s->file; |
| fail: |
| g_free(s); |
| return NULL; |
| } |
| |
| static int block_put_buffer(void *opaque, const uint8_t *buf, |
| int64_t pos, int size) |
| { |
| bdrv_save_vmstate(opaque, buf, pos, size); |
| return size; |
| } |
| |
| static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
| { |
| return bdrv_load_vmstate(opaque, buf, pos, size); |
| } |
| |
| static int bdrv_fclose(void *opaque) |
| { |
| 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, |
| .close = bdrv_fclose |
| }; |
| |
| static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
| { |
| if (is_writable) |
| return qemu_fopen_ops(bs, &bdrv_write_ops); |
| return qemu_fopen_ops(bs, &bdrv_read_ops); |
| } |
| |
| QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops) |
| { |
| QEMUFile *f; |
| |
| f = g_malloc0(sizeof(QEMUFile)); |
| |
| f->opaque = opaque; |
| f->ops = ops; |
| f->is_write = 0; |
| |
| return f; |
| } |
| |
| int qemu_file_get_error(QEMUFile *f) |
| { |
| return f->last_error; |
| } |
| |
| static void qemu_file_set_error(QEMUFile *f, int ret) |
| { |
| if (f->last_error == 0) { |
| f->last_error = ret; |
| } |
| } |
| |
| /** Flushes QEMUFile buffer |
| * |
| */ |
| static int qemu_fflush(QEMUFile *f) |
| { |
| int ret = 0; |
| |
| if (!f->ops->put_buffer) |
| return 0; |
| |
| if (f->is_write && f->buf_index > 0) { |
| ret = f->ops->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
| if (ret >= 0) { |
| f->buf_offset += f->buf_index; |
| } |
| f->buf_index = 0; |
| } |
| return ret; |
| } |
| |
| static void qemu_fill_buffer(QEMUFile *f) |
| { |
| int len; |
| int pending; |
| |
| if (!f->ops->get_buffer) |
| return; |
| |
| if (f->is_write) |
| abort(); |
| |
| pending = f->buf_size - f->buf_index; |
| if (pending > 0) { |
| memmove(f->buf, f->buf + f->buf_index, pending); |
| } |
| f->buf_index = 0; |
| f->buf_size = pending; |
| |
| len = f->ops->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
| IO_BUF_SIZE - pending); |
| if (len > 0) { |
| f->buf_size += len; |
| f->buf_offset += len; |
| } else if (len == 0) { |
| qemu_file_set_error(f, -EIO); |
| } else if (len != -EAGAIN) |
| qemu_file_set_error(f, len); |
| } |
| |
| int qemu_get_fd(QEMUFile *f) |
| { |
| if (f->ops->get_fd) { |
| return f->ops->get_fd(f->opaque); |
| } |
| return -1; |
| } |
| |
| /** Closes the file |
| * |
| * Returns negative error value if any error happened on previous operations or |
| * while closing the file. Returns 0 or positive number on success. |
| * |
| * The meaning of return value on success depends on the specific backend |
| * being used. |
| */ |
| int qemu_fclose(QEMUFile *f) |
| { |
| int ret; |
| ret = qemu_fflush(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. |
| */ |
| if (f->last_error) { |
| ret = f->last_error; |
| } |
| g_free(f); |
| return ret; |
| } |
| |
| void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
| { |
| int l; |
| |
| if (f->last_error) { |
| return; |
| } |
| |
| if (f->is_write == 0 && f->buf_index > 0) { |
| fprintf(stderr, |
| "Attempted to write to buffer while read buffer is not empty\n"); |
| abort(); |
| } |
| |
| 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->buf_index += l; |
| buf += l; |
| size -= l; |
| if (f->buf_index >= IO_BUF_SIZE) { |
| int ret = qemu_fflush(f); |
| if (ret < 0) { |
| qemu_file_set_error(f, ret); |
| break; |
| } |
| } |
| } |
| } |
| |
| void qemu_put_byte(QEMUFile *f, int v) |
| { |
| if (f->last_error) { |
| return; |
| } |
| |
| if (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) { |
| int ret = qemu_fflush(f); |
| if (ret < 0) { |
| qemu_file_set_error(f, ret); |
| } |
| } |
| } |
| |
| static void qemu_file_skip(QEMUFile *f, int size) |
| { |
| if (f->buf_index + size <= f->buf_size) { |
| f->buf_index += size; |
| } |
| } |
| |
| static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) |
| { |
| int pending; |
| int index; |
| |
| if (f->is_write) { |
| abort(); |
| } |
| |
| index = f->buf_index + offset; |
| pending = f->buf_size - index; |
| if (pending < size) { |
| qemu_fill_buffer(f); |
| index = f->buf_index + offset; |
| pending = f->buf_size - index; |
| } |
| |
| if (pending <= 0) { |
| return 0; |
| } |
| if (size > pending) { |
| size = pending; |
| } |
| |
| memcpy(buf, f->buf + index, size); |
| return size; |
| } |
| |
| int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) |
| { |
| int pending = size; |
| int done = 0; |
| |
| while (pending > 0) { |
| int res; |
| |
| res = qemu_peek_buffer(f, buf, pending, 0); |
| if (res == 0) { |
| return done; |
| } |
| qemu_file_skip(f, res); |
| buf += res; |
| pending -= res; |
| done += res; |
| } |
| return done; |
| } |
| |
| static int qemu_peek_byte(QEMUFile *f, int offset) |
| { |
| int index = f->buf_index + offset; |
| |
| if (f->is_write) { |
| abort(); |
| } |
| |
| if (index >= f->buf_size) { |
| qemu_fill_buffer(f); |
| index = f->buf_index + offset; |
| if (index >= f->buf_size) { |
| return 0; |
| } |
| } |
| return f->buf[index]; |
| } |
| |
| int qemu_get_byte(QEMUFile *f) |
| { |
| int result; |
| |
| result = qemu_peek_byte(f, 0); |
| qemu_file_skip(f, 1); |
| return result; |
| } |
| |
| static int64_t qemu_ftell(QEMUFile *f) |
| { |
| return f->buf_offset - f->buf_size + f->buf_index; |
| } |
| |
| int qemu_file_rate_limit(QEMUFile *f) |
| { |
| if (f->ops->rate_limit) |
| return f->ops->rate_limit(f->opaque); |
| |
| return 0; |
| } |
| |
| int64_t qemu_file_get_rate_limit(QEMUFile *f) |
| { |
| if (f->ops->get_rate_limit) |
| return f->ops->get_rate_limit(f->opaque); |
| |
| return 0; |
| } |
| |
| int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
| { |
| /* any failed or completed migration keeps its state to allow probing of |
| * migration data, but has no associated file anymore */ |
| if (f && f->ops->set_rate_limit) |
| return f->ops->set_rate_limit(f->opaque, new_rate); |
| |
| 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; |
| } |
| |
| |
| /* timer */ |
| |
| void qemu_put_timer(QEMUFile *f, QEMUTimer *ts) |
| { |
| uint64_t expire_time; |
| |
| expire_time = qemu_timer_expire_time_ns(ts); |
| qemu_put_be64(f, expire_time); |
| } |
| |
| void qemu_get_timer(QEMUFile *f, QEMUTimer *ts) |
| { |
| uint64_t expire_time; |
| |
| expire_time = qemu_get_be64(f); |
| if (expire_time != -1) { |
| qemu_mod_timer_ns(ts, expire_time); |
| } else { |
| qemu_del_timer(ts); |
| } |
| } |
| |
| |
| /* bool */ |
| |
| static int get_bool(QEMUFile *f, void *pv, size_t size) |
| { |
| bool *v = pv; |
| *v = qemu_get_byte(f); |
| return 0; |
| } |
| |
| static void put_bool(QEMUFile *f, void *pv, size_t size) |
| { |
| bool *v = pv; |
| qemu_put_byte(f, *v); |
| } |
| |
| const VMStateInfo vmstate_info_bool = { |
| .name = "bool", |
| .get = get_bool, |
| .put = put_bool, |
| }; |
| |
| /* 8 bit int */ |
| |
| static int get_int8(QEMUFile *f, void *pv, size_t size) |
| { |
| int8_t *v = pv; |
| qemu_get_s8s(f, v); |
| return 0; |
| } |
| |
| static void put_int8(QEMUFile *f, void *pv, size_t size) |
| { |
| int8_t *v = pv; |
| qemu_put_s8s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_int8 = { |
| .name = "int8", |
| .get = get_int8, |
| .put = put_int8, |
| }; |
| |
| /* 16 bit int */ |
| |
| static int get_int16(QEMUFile *f, void *pv, size_t size) |
| { |
| int16_t *v = pv; |
| qemu_get_sbe16s(f, v); |
| return 0; |
| } |
| |
| static void put_int16(QEMUFile *f, void *pv, size_t size) |
| { |
| int16_t *v = pv; |
| qemu_put_sbe16s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_int16 = { |
| .name = "int16", |
| .get = get_int16, |
| .put = put_int16, |
| }; |
| |
| /* 32 bit int */ |
| |
| static int get_int32(QEMUFile *f, void *pv, size_t size) |
| { |
| int32_t *v = pv; |
| qemu_get_sbe32s(f, v); |
| return 0; |
| } |
| |
| static void put_int32(QEMUFile *f, void *pv, size_t size) |
| { |
| int32_t *v = pv; |
| qemu_put_sbe32s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_int32 = { |
| .name = "int32", |
| .get = get_int32, |
| .put = put_int32, |
| }; |
| |
| /* 32 bit int. See that the received value is the same than the one |
| in the field */ |
| |
| static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
| { |
| int32_t *v = pv; |
| int32_t v2; |
| qemu_get_sbe32s(f, &v2); |
| |
| if (*v == v2) |
| return 0; |
| return -EINVAL; |
| } |
| |
| const VMStateInfo vmstate_info_int32_equal = { |
| .name = "int32 equal", |
| .get = get_int32_equal, |
| .put = put_int32, |
| }; |
| |
| /* 32 bit int. See that the received value is the less or the same |
| than the one in the field */ |
| |
| static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
| { |
| int32_t *old = pv; |
| int32_t new; |
| qemu_get_sbe32s(f, &new); |
| |
| if (*old <= new) |
| return 0; |
| return -EINVAL; |
| } |
| |
| const VMStateInfo vmstate_info_int32_le = { |
| .name = "int32 equal", |
| .get = get_int32_le, |
| .put = put_int32, |
| }; |
| |
| /* 64 bit int */ |
| |
| static int get_int64(QEMUFile *f, void *pv, size_t size) |
| { |
| int64_t *v = pv; |
| qemu_get_sbe64s(f, v); |
| return 0; |
| } |
| |
| static void put_int64(QEMUFile *f, void *pv, size_t size) |
| { |
| int64_t *v = pv; |
| qemu_put_sbe64s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_int64 = { |
| .name = "int64", |
| .get = get_int64, |
| .put = put_int64, |
| }; |
| |
| /* 8 bit unsigned int */ |
| |
| static int get_uint8(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t *v = pv; |
| qemu_get_8s(f, v); |
| return 0; |
| } |
| |
| static void put_uint8(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t *v = pv; |
| qemu_put_8s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_uint8 = { |
| .name = "uint8", |
| .get = get_uint8, |
| .put = put_uint8, |
| }; |
| |
| /* 16 bit unsigned int */ |
| |
| static int get_uint16(QEMUFile *f, void *pv, size_t size) |
| { |
| uint16_t *v = pv; |
| qemu_get_be16s(f, v); |
| return 0; |
| } |
| |
| static void put_uint16(QEMUFile *f, void *pv, size_t size) |
| { |
| uint16_t *v = pv; |
| qemu_put_be16s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_uint16 = { |
| .name = "uint16", |
| .get = get_uint16, |
| .put = put_uint16, |
| }; |
| |
| /* 32 bit unsigned int */ |
| |
| static int get_uint32(QEMUFile *f, void *pv, size_t size) |
| { |
| uint32_t *v = pv; |
| qemu_get_be32s(f, v); |
| return 0; |
| } |
| |
| static void put_uint32(QEMUFile *f, void *pv, size_t size) |
| { |
| uint32_t *v = pv; |
| qemu_put_be32s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_uint32 = { |
| .name = "uint32", |
| .get = get_uint32, |
| .put = put_uint32, |
| }; |
| |
| /* 32 bit uint. See that the received value is the same than the one |
| in the field */ |
| |
| static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
| { |
| uint32_t *v = pv; |
| uint32_t v2; |
| qemu_get_be32s(f, &v2); |
| |
| if (*v == v2) { |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| const VMStateInfo vmstate_info_uint32_equal = { |
| .name = "uint32 equal", |
| .get = get_uint32_equal, |
| .put = put_uint32, |
| }; |
| |
| /* 64 bit unsigned int */ |
| |
| static int get_uint64(QEMUFile *f, void *pv, size_t size) |
| { |
| uint64_t *v = pv; |
| qemu_get_be64s(f, v); |
| return 0; |
| } |
| |
| static void put_uint64(QEMUFile *f, void *pv, size_t size) |
| { |
| uint64_t *v = pv; |
| qemu_put_be64s(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_uint64 = { |
| .name = "uint64", |
| .get = get_uint64, |
| .put = put_uint64, |
| }; |
| |
| /* 8 bit int. See that the received value is the same than the one |
| in the field */ |
| |
| static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t *v = pv; |
| uint8_t v2; |
| qemu_get_8s(f, &v2); |
| |
| if (*v == v2) |
| return 0; |
| return -EINVAL; |
| } |
| |
| const VMStateInfo vmstate_info_uint8_equal = { |
| .name = "uint8 equal", |
| .get = get_uint8_equal, |
| .put = put_uint8, |
| }; |
| |
| /* 16 bit unsigned int int. See that the received value is the same than the one |
| in the field */ |
| |
| static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
| { |
| uint16_t *v = pv; |
| uint16_t v2; |
| qemu_get_be16s(f, &v2); |
| |
| if (*v == v2) |
| return 0; |
| return -EINVAL; |
| } |
| |
| const VMStateInfo vmstate_info_uint16_equal = { |
| .name = "uint16 equal", |
| .get = get_uint16_equal, |
| .put = put_uint16, |
| }; |
| |
| /* timers */ |
| |
| static int get_timer(QEMUFile *f, void *pv, size_t size) |
| { |
| QEMUTimer *v = pv; |
| qemu_get_timer(f, v); |
| return 0; |
| } |
| |
| static void put_timer(QEMUFile *f, void *pv, size_t size) |
| { |
| QEMUTimer *v = pv; |
| qemu_put_timer(f, v); |
| } |
| |
| const VMStateInfo vmstate_info_timer = { |
| .name = "timer", |
| .get = get_timer, |
| .put = put_timer, |
| }; |
| |
| /* uint8_t buffers */ |
| |
| static int get_buffer(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t *v = pv; |
| qemu_get_buffer(f, v, size); |
| return 0; |
| } |
| |
| static void put_buffer(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t *v = pv; |
| qemu_put_buffer(f, v, size); |
| } |
| |
| const VMStateInfo vmstate_info_buffer = { |
| .name = "buffer", |
| .get = get_buffer, |
| .put = put_buffer, |
| }; |
| |
| /* unused buffers: space that was used for some fields that are |
| not useful anymore */ |
| |
| static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| { |
| uint8_t buf[1024]; |
| int block_len; |
| |
| while (size > 0) { |
| block_len = MIN(sizeof(buf), size); |
| size -= block_len; |
| qemu_get_buffer(f, buf, block_len); |
| } |
| return 0; |
| } |
| |
| static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| { |
| static const uint8_t buf[1024]; |
| int block_len; |
| |
| while (size > 0) { |
| block_len = MIN(sizeof(buf), size); |
| size -= block_len; |
| qemu_put_buffer(f, buf, block_len); |
| } |
| } |
| |
| const VMStateInfo vmstate_info_unused_buffer = { |
| .name = "unused_buffer", |
| .get = get_unused_buffer, |
| .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; |
| } CompatEntry; |
| |
| typedef struct SaveStateEntry { |
| QTAILQ_ENTRY(SaveStateEntry) entry; |
| char idstr[256]; |
| int instance_id; |
| int alias_id; |
| int version_id; |
| int section_id; |
| SaveVMHandlers *ops; |
| const VMStateDescription *vmsd; |
| void *opaque; |
| CompatEntry *compat; |
| int no_migrate; |
| int is_ram; |
| } SaveStateEntry; |
| |
| |
| static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers = |
| QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
| static int global_section_id; |
| |
| static int calculate_new_instance_id(const char *idstr) |
| { |
| SaveStateEntry *se; |
| int instance_id = 0; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (strcmp(idstr, se->idstr) == 0 |
| && instance_id <= se->instance_id) { |
| instance_id = se->instance_id + 1; |
| } |
| } |
| return instance_id; |
| } |
| |
| static int calculate_compat_instance_id(const char *idstr) |
| { |
| SaveStateEntry *se; |
| int instance_id = 0; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (!se->compat) |
| continue; |
| |
| if (strcmp(idstr, se->compat->idstr) == 0 |
| && instance_id <= se->compat->instance_id) { |
| instance_id = se->compat->instance_id + 1; |
| } |
| } |
| return instance_id; |
| } |
| |
| /* 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(DeviceState *dev, |
| const char *idstr, |
| int instance_id, |
| int version_id, |
| SaveVMHandlers *ops, |
| void *opaque) |
| { |
| SaveStateEntry *se; |
| |
| se = g_malloc0(sizeof(SaveStateEntry)); |
| se->version_id = version_id; |
| se->section_id = global_section_id++; |
| 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) { |
| char *id = qdev_get_dev_path(dev); |
| if (id) { |
| pstrcpy(se->idstr, sizeof(se->idstr), id); |
| pstrcat(se->idstr, sizeof(se->idstr), "/"); |
| g_free(id); |
| |
| se->compat = g_malloc0(sizeof(CompatEntry)); |
| pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr); |
| se->compat->instance_id = instance_id == -1 ? |
| calculate_compat_instance_id(idstr) : instance_id; |
| instance_id = -1; |
| } |
| } |
| pstrcat(se->idstr, sizeof(se->idstr), idstr); |
| |
| if (instance_id == -1) { |
| se->instance_id = calculate_new_instance_id(se->idstr); |
| } else { |
| se->instance_id = instance_id; |
| } |
| assert(!se->compat || se->instance_id == 0); |
| /* add at the end of list */ |
| QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| return 0; |
| } |
| |
| int register_savevm(DeviceState *dev, |
| const char *idstr, |
| int instance_id, |
| int version_id, |
| SaveStateHandler *save_state, |
| 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, |
| ops, opaque); |
| } |
| |
| void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
| { |
| SaveStateEntry *se, *new_se; |
| char id[256] = ""; |
| |
| if (dev) { |
| char *path = qdev_get_dev_path(dev); |
| if (path) { |
| pstrcpy(id, sizeof(id), path); |
| pstrcat(id, sizeof(id), "/"); |
| g_free(path); |
| } |
| } |
| pstrcat(id, sizeof(id), idstr); |
| |
| QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
| if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
| QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| if (se->compat) { |
| g_free(se->compat); |
| } |
| g_free(se->ops); |
| g_free(se); |
| } |
| } |
| } |
| |
| int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
| const VMStateDescription *vmsd, |
| void *opaque, int alias_id, |
| int required_for_version) |
| { |
| SaveStateEntry *se; |
| |
| /* If this triggers, alias support can be dropped for the vmsd. */ |
| assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id); |
| |
| se = g_malloc0(sizeof(SaveStateEntry)); |
| se->version_id = vmsd->version_id; |
| se->section_id = global_section_id++; |
| se->opaque = opaque; |
| se->vmsd = vmsd; |
| se->alias_id = alias_id; |
| se->no_migrate = vmsd->unmigratable; |
| |
| if (dev) { |
| char *id = qdev_get_dev_path(dev); |
| if (id) { |
| pstrcpy(se->idstr, sizeof(se->idstr), id); |
| pstrcat(se->idstr, sizeof(se->idstr), "/"); |
| g_free(id); |
| |
| se->compat = g_malloc0(sizeof(CompatEntry)); |
| pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name); |
| se->compat->instance_id = instance_id == -1 ? |
| calculate_compat_instance_id(vmsd->name) : instance_id; |
| instance_id = -1; |
| } |
| } |
| pstrcat(se->idstr, sizeof(se->idstr), vmsd->name); |
| |
| if (instance_id == -1) { |
| se->instance_id = calculate_new_instance_id(se->idstr); |
| } else { |
| se->instance_id = instance_id; |
| } |
| assert(!se->compat || se->instance_id == 0); |
| /* add at the end of list */ |
| QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
| 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) |
| { |
| SaveStateEntry *se, *new_se; |
| |
| QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
| if (se->vmsd == vmsd && se->opaque == opaque) { |
| QTAILQ_REMOVE(&savevm_handlers, se, entry); |
| if (se->compat) { |
| g_free(se->compat); |
| } |
| g_free(se); |
| } |
| } |
| } |
| |
| static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque); |
| static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque); |
| |
| int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque, int version_id) |
| { |
| VMStateField *field = vmsd->fields; |
| int ret; |
| |
| if (version_id > vmsd->version_id) { |
| return -EINVAL; |
| } |
| if (version_id < vmsd->minimum_version_id_old) { |
| return -EINVAL; |
| } |
| if (version_id < vmsd->minimum_version_id) { |
| return vmsd->load_state_old(f, opaque, version_id); |
| } |
| if (vmsd->pre_load) { |
| int ret = vmsd->pre_load(opaque); |
| if (ret) |
| return ret; |
| } |
| while(field->name) { |
| if ((field->field_exists && |
| field->field_exists(opaque, version_id)) || |
| (!field->field_exists && |
| field->version_id <= version_id)) { |
| void *base_addr = opaque + field->offset; |
| int i, n_elems = 1; |
| int size = field->size; |
| |
| if (field->flags & VMS_VBUFFER) { |
| size = *(int32_t *)(opaque+field->size_offset); |
| if (field->flags & VMS_MULTIPLY) { |
| size *= field->size; |
| } |
| } |
| if (field->flags & VMS_ARRAY) { |
| 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) { |
| n_elems = *(uint8_t *)(opaque+field->num_offset); |
| } |
| if (field->flags & VMS_POINTER) { |
| base_addr = *(void **)base_addr + field->start; |
| } |
| for (i = 0; i < n_elems; i++) { |
| void *addr = base_addr + size * i; |
| |
| if (field->flags & VMS_ARRAY_OF_POINTER) { |
| addr = *(void **)addr; |
| } |
| if (field->flags & VMS_STRUCT) { |
| ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
| } else { |
| ret = field->info->get(f, addr, size); |
| |
| } |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| } |
| field++; |
| } |
| ret = vmstate_subsection_load(f, vmsd, opaque); |
| if (ret != 0) { |
| return ret; |
| } |
| if (vmsd->post_load) { |
| return vmsd->post_load(opaque, version_id); |
| } |
| return 0; |
| } |
| |
| void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque) |
| { |
| VMStateField *field = vmsd->fields; |
| |
| if (vmsd->pre_save) { |
| vmsd->pre_save(opaque); |
| } |
| while(field->name) { |
| if (!field->field_exists || |
| field->field_exists(opaque, vmsd->version_id)) { |
| void *base_addr = opaque + field->offset; |
| int i, n_elems = 1; |
| int size = field->size; |
| |
| if (field->flags & VMS_VBUFFER) { |
| size = *(int32_t *)(opaque+field->size_offset); |
| if (field->flags & VMS_MULTIPLY) { |
| size *= field->size; |
| } |
| } |
| if (field->flags & VMS_ARRAY) { |
| 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) { |
| n_elems = *(uint8_t *)(opaque+field->num_offset); |
| } |
| if (field->flags & VMS_POINTER) { |
| base_addr = *(void **)base_addr + field->start; |
| } |
| for (i = 0; i < n_elems; i++) { |
| void *addr = base_addr + size * i; |
| |
| if (field->flags & VMS_ARRAY_OF_POINTER) { |
| addr = *(void **)addr; |
| } |
| if (field->flags & VMS_STRUCT) { |
| vmstate_save_state(f, field->vmsd, addr); |
| } else { |
| field->info->put(f, addr, size); |
| } |
| } |
| } |
| field++; |
| } |
| vmstate_subsection_save(f, vmsd, opaque); |
| } |
| |
| static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
| { |
| if (!se->vmsd) { /* Old style */ |
| 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->ops->save_state(f, se->opaque); |
| return; |
| } |
| vmstate_save_state(f,se->vmsd, se->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 |
| #define QEMU_VM_SUBSECTION 0x05 |
| |
| bool qemu_savevm_state_blocked(Error **errp) |
| { |
| SaveStateEntry *se; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (se->no_migrate) { |
| error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| int qemu_savevm_state_begin(QEMUFile *f, |
| const MigrationParams *params) |
| { |
| SaveStateEntry *se; |
| int ret; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (!se->ops || !se->ops->set_params) { |
| continue; |
| } |
| se->ops->set_params(params, se->opaque); |
| } |
| |
| qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
| qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| int len; |
| |
| 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); |
| |
| /* 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); |
| |
| ret = se->ops->save_live_setup(f, se->opaque); |
| if (ret < 0) { |
| qemu_savevm_state_cancel(); |
| return ret; |
| } |
| } |
| ret = qemu_file_get_error(f); |
| if (ret != 0) { |
| qemu_savevm_state_cancel(); |
| } |
| |
| return ret; |
| |
| } |
| |
| /* |
| * this function has three return values: |
| * negative: there was one error, and we have -errno. |
| * 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(QEMUFile *f) |
| { |
| SaveStateEntry *se; |
| int ret = 1; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| 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->ops->save_live_iterate(f, se->opaque); |
| trace_savevm_section_end(se->section_id); |
| |
| if (ret <= 0) { |
| /* Do not proceed to the next vmstate before this one reported |
| completion of the current stage. This serializes the migration |
| and reduces the probability that a faster changing state is |
| synchronized over and over again. */ |
| break; |
| } |
| } |
| if (ret != 0) { |
| return ret; |
| } |
| ret = qemu_file_get_error(f); |
| if (ret != 0) { |
| qemu_savevm_state_cancel(); |
| } |
| return ret; |
| } |
| |
| int qemu_savevm_state_complete(QEMUFile *f) |
| { |
| SaveStateEntry *se; |
| int ret; |
| |
| cpu_synchronize_all_states(); |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| 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->ops->save_live_complete(f, se->opaque); |
| trace_savevm_section_end(se->section_id); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| int len; |
| |
| 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); |
| |
| /* 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); |
| trace_savevm_section_end(se->section_id); |
| } |
| |
| qemu_put_byte(f, QEMU_VM_EOF); |
| |
| 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(void) |
| { |
| SaveStateEntry *se; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (se->ops && se->ops->cancel) { |
| se->ops->cancel(se->opaque); |
| } |
| } |
| } |
| |
| static int qemu_savevm_state(QEMUFile *f) |
| { |
| int ret; |
| MigrationParams params = { |
| .blk = 0, |
| .shared = 0 |
| }; |
| |
| if (qemu_savevm_state_blocked(NULL)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = qemu_savevm_state_begin(f, ¶ms); |
| 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 (ret == 0) { |
| ret = qemu_file_get_error(f); |
| } |
| |
| 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; |
| |
| QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
| if (!strcmp(se->idstr, idstr) && |
| (instance_id == se->instance_id || |
| instance_id == se->alias_id)) |
| return se; |
| /* Migrating from an older version? */ |
| if (strstr(se->idstr, idstr) && se->compat) { |
| if (!strcmp(se->compat->idstr, idstr) && |
| (instance_id == se->compat->instance_id || |
| instance_id == se->alias_id)) |
| return se; |
| } |
| } |
| return NULL; |
| } |
| |
| static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
| { |
| while(sub && sub->needed) { |
| if (strcmp(idstr, sub->vmsd->name) == 0) { |
| return sub->vmsd; |
| } |
| sub++; |
| } |
| return NULL; |
| } |
| |
| static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque) |
| { |
| while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
| char idstr[256]; |
| int ret; |
| uint8_t version_id, len, size; |
| const VMStateDescription *sub_vmsd; |
| |
| len = qemu_peek_byte(f, 1); |
| if (len < strlen(vmsd->name) + 1) { |
| /* subsection name has be be "section_name/a" */ |
| return 0; |
| } |
| size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); |
| if (size != len) { |
| return 0; |
| } |
| idstr[size] = 0; |
| |
| if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
| /* it don't have a valid subsection name */ |
| return 0; |
| } |
| sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
| if (sub_vmsd == NULL) { |
| return -ENOENT; |
| } |
| qemu_file_skip(f, 1); /* subsection */ |
| qemu_file_skip(f, 1); /* len */ |
| qemu_file_skip(f, len); /* idstr */ |
| version_id = qemu_get_be32(f); |
| |
| ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
| if (ret) { |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| void *opaque) |
| { |
| const VMStateSubsection *sub = vmsd->subsections; |
| |
| while (sub && sub->needed) { |
| if (sub->needed(opaque)) { |
| const VMStateDescription *vmsd = sub->vmsd; |
| uint8_t len; |
| |
| qemu_put_byte(f, QEMU_VM_SUBSECTION); |
| len = strlen(vmsd->name); |
| qemu_put_byte(f, len); |
| qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
| qemu_put_be32(f, vmsd->version_id); |
| vmstate_save_state(f, vmsd, opaque); |
| } |
| sub++; |
| } |
| } |
| |
| typedef struct LoadStateEntry { |
| QLIST_ENTRY(LoadStateEntry) entry; |
| SaveStateEntry *se; |
| int section_id; |
| int version_id; |
| } LoadStateEntry; |
| |
| int qemu_loadvm_state(QEMUFile *f) |
| { |
| QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
| QLIST_HEAD_INITIALIZER(loadvm_handlers); |
| LoadStateEntry *le, *new_le; |
| uint8_t section_type; |
| unsigned int v; |
| int ret; |
| |
| if (qemu_savevm_state_blocked(NULL)) { |
| return -EINVAL; |
| } |
| |
| 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) { |
| fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n"); |
| return -ENOTSUP; |
| } |
| 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; |
| 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 = g_malloc0(sizeof(*le)); |
| |
| le->se = se; |
| le->section_id = section_id; |
| le->version_id = version_id; |
| QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
| |
| ret = vmstate_load(f, le->se, le->version_id); |
| if (ret < 0) { |
| fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n", |
| instance_id, idstr); |
| goto out; |
| } |
| break; |
| case QEMU_VM_SECTION_PART: |
| case QEMU_VM_SECTION_END: |
| section_id = qemu_get_be32(f); |
| |
| QLIST_FOREACH(le, &loadvm_handlers, entry) { |
| if (le->section_id == section_id) { |
| break; |
| } |
| } |
| if (le == NULL) { |
| fprintf(stderr, "Unknown savevm section %d\n", section_id); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = vmstate_load(f, le->se, le->version_id); |
| if (ret < 0) { |
| fprintf(stderr, "qemu: warning: error while loading state section id %d\n", |
| section_id); |
| goto out; |
| } |
| break; |
| default: |
| fprintf(stderr, "Unknown savevm section type %d\n", section_type); |
| ret = -EINVAL; |
| goto out; |
| } |
| } |
| |
| cpu_synchronize_all_post_init(); |
| |
| ret = 0; |
| |
| out: |
| QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
| QLIST_REMOVE(le, entry); |
| g_free(le); |
| } |
| |
| if (ret == 0) { |
| ret = qemu_file_get_error(f); |
| } |
| |
| return ret; |
| } |
| |
| 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; |
| } |
| } |
| g_free(sn_tab); |
| return ret; |
| } |
| |
| /* |
| * Deletes snapshots of a given name in all opened images. |
| */ |
| static int del_existing_snapshots(Monitor *mon, const char *name) |
| { |
| BlockDriverState *bs; |
| QEMUSnapshotInfo sn1, *snapshot = &sn1; |
| int ret; |
| |
| bs = NULL; |
| while ((bs = bdrv_next(bs))) { |
| if (bdrv_can_snapshot(bs) && |
| bdrv_snapshot_find(bs, snapshot, name) >= 0) |
| { |
| ret = bdrv_snapshot_delete(bs, name); |
| if (ret < 0) { |
| monitor_printf(mon, |
| "Error while deleting snapshot on '%s'\n", |
| bdrv_get_device_name(bs)); |
| return -1; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| void do_savevm(Monitor *mon, const QDict *qdict) |
| { |
| BlockDriverState *bs, *bs1; |
| QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
| int ret; |
| QEMUFile *f; |
| int saved_vm_running; |
| uint64_t vm_state_size; |
| qemu_timeval tv; |
| struct tm tm; |
| const char *name = qdict_get_try_str(qdict, "name"); |
| |
| /* Verify if there is a device that doesn't support snapshots and is writable */ |
| bs = NULL; |
| while ((bs = bdrv_next(bs))) { |
| |
| if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
| continue; |
| } |
| |
| if (!bdrv_can_snapshot(bs)) { |
| monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n", |
| bdrv_get_device_name(bs)); |
| return; |
| } |
| } |
| |
| bs = bdrv_snapshots(); |
| if (!bs) { |
| monitor_printf(mon, "No block device can accept snapshots\n"); |
| return; |
| } |
| |
| saved_vm_running = runstate_is_running(); |
| vm_stop(RUN_STATE_SAVE_VM); |
| |
| memset(sn, 0, sizeof(*sn)); |
| |
| /* fill auxiliary fields */ |
| qemu_gettimeofday(&tv); |
| sn->date_sec = tv.tv_sec; |
| sn->date_nsec = tv.tv_usec * 1000; |
| sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
| |
| if (name) { |
| ret = bdrv_snapshot_find(bs, old_sn, name); |
| if (ret >= 0) { |
| pstrcpy(sn->name, sizeof(sn->name), old_sn->name); |
| pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str); |
| } else { |
| pstrcpy(sn->name, sizeof(sn->name), name); |
| } |
| } 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); |
| } |
| |
| /* Delete old snapshots of the same name */ |
| if (name && del_existing_snapshots(mon, name) < 0) { |
| goto the_end; |
| } |
| |
| /* save the VM state */ |
| f = qemu_fopen_bdrv(bs, 1); |
| if (!f) { |
| monitor_printf(mon, "Could not open VM state file\n"); |
| goto the_end; |
| } |
| ret = qemu_savevm_state(f); |
| vm_state_size = qemu_ftell(f); |
| qemu_fclose(f); |
| if (ret < 0) { |
| monitor_printf(mon, "Error %d while writing VM\n", ret); |
| goto the_end; |
| } |
| |
| /* create the snapshots */ |
| |
| bs1 = NULL; |
| while ((bs1 = bdrv_next(bs1))) { |
| if (bdrv_can_snapshot(bs1)) { |
| /* Write VM state size only to the image that contains the state */ |
| sn->vm_state_size = (bs == bs1 ? vm_state_size : 0); |
| ret = bdrv_snapshot_create(bs1, sn); |
| if (ret < 0) { |
| monitor_printf(mon, "Error while creating snapshot on '%s'\n", |
| bdrv_get_device_name(bs1)); |
| } |
| } |
| } |
| |
| the_end: |
| if (saved_vm_running) |
| 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; |
| QEMUSnapshotInfo sn; |
| QEMUFile *f; |
| int ret; |
| |
| bs_vm_state = bdrv_snapshots(); |
| if (!bs_vm_state) { |
| error_report("No block device supports snapshots"); |
| return -ENOTSUP; |
| } |
| |
| /* Don't even try to load empty VM states */ |
| ret = bdrv_snapshot_find(bs_vm_state, &sn, name); |
| if (ret < 0) { |
| return ret; |
| } else if (sn.vm_state_size == 0) { |
| error_report("This is a disk-only snapshot. Revert to it offline " |
| "using qemu-img."); |
| return -EINVAL; |
| } |
| |
| /* Verify if there is any device that doesn't support snapshots and is |
| writable and check if the requested snapshot is available too. */ |
| bs = NULL; |
| while ((bs = bdrv_next(bs))) { |
| |
| if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { |
| continue; |
| } |
| |
| if (!bdrv_can_snapshot(bs)) { |
| error_report("Device '%s' is writable but does not support snapshots.", |
| bdrv_get_device_name(bs)); |
| return -ENOTSUP; |
| } |
| |
| ret = bdrv_snapshot_find(bs, &sn, name); |
| if (ret < 0) { |
| error_report("Device '%s' does not have the requested snapshot '%s'", |
| bdrv_get_device_name(bs), name); |
| return ret; |
| } |
| } |
| |
| /* Flush all IO requests so they don't interfere with the new state. */ |
| bdrv_drain_all(); |
| |
| bs = NULL; |
| while ((bs = bdrv_next(bs))) { |
| if (bdrv_can_snapshot(bs)) { |
| ret = bdrv_snapshot_goto(bs, name); |
| if (ret < 0) { |
| error_report("Error %d while activating snapshot '%s' on '%s'", |
| ret, name, bdrv_get_device_name(bs)); |
| return ret; |
| } |
| } |
| } |
| |
| /* restore the VM state */ |
| f = qemu_fopen_bdrv(bs_vm_state, 0); |
| if (!f) { |
| error_report("Could not open VM state file"); |
| return -EINVAL; |
| } |
| |
| qemu_system_reset(VMRESET_SILENT); |
| ret = qemu_loadvm_state(f); |
| |
| qemu_fclose(f); |
| if (ret < 0) { |
| error_report("Error %d while loading VM state", ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| void do_delvm(Monitor *mon, const QDict *qdict) |
| { |
| BlockDriverState *bs, *bs1; |
| int ret; |
| const char *name = qdict_get_str(qdict, "name"); |
| |
| bs = bdrv_snapshots(); |
| if (!bs) { |
| monitor_printf(mon, "No block device supports snapshots\n"); |
| return; |
| } |
| |
| bs1 = NULL; |
| while ((bs1 = bdrv_next(bs1))) { |
| if (bdrv_can_snapshot(bs1)) { |
| ret = bdrv_snapshot_delete(bs1, name); |
| if (ret < 0) { |
| if (ret == -ENOTSUP) |
| monitor_printf(mon, |
| "Snapshots not supported on device '%s'\n", |
| bdrv_get_device_name(bs1)); |
| else |
| monitor_printf(mon, "Error %d while deleting snapshot on " |
| "'%s'\n", ret, bdrv_get_device_name(bs1)); |
| } |
| } |
| } |
| } |
| |
| 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(); |
| if (!bs) { |
| monitor_printf(mon, "No available block device supports snapshots\n"); |
| return; |
| } |
| |
| nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
| if (nb_sns < 0) { |
| monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); |
| return; |
| } |
| |
| if (nb_sns == 0) { |
| monitor_printf(mon, "There is no snapshot available.\n"); |
| return; |
| } |
| |
| available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
| total = 0; |
| for (i = 0; i < nb_sns; i++) { |
| sn = &sn_tab[i]; |
| available = 1; |
| bs1 = NULL; |
| |
| while ((bs1 = bdrv_next(bs1))) { |
| if (bdrv_can_snapshot(bs1) && bs1 != bs) { |
| ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); |
| if (ret < 0) { |
| available = 0; |
| break; |
| } |
| } |
| } |
| |
| if (available) { |
| available_snapshots[total] = i; |
| total++; |
| } |
| } |
| |
| if (total > 0) { |
| monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
| for (i = 0; i < total; i++) { |
| sn = &sn_tab[available_snapshots[i]]; |
| monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
| } |
| } else { |
| monitor_printf(mon, "There is no suitable snapshot available\n"); |
| } |
| |
| g_free(sn_tab); |
| g_free(available_snapshots); |
| |
| } |
| |
| void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev) |
| { |
| qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK, |
| memory_region_name(mr), dev); |
| } |
| |
| void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev) |
| { |
| /* Nothing do to while the implementation is in RAMBlock */ |
| } |
| |
| void vmstate_register_ram_global(MemoryRegion *mr) |
| { |
| vmstate_register_ram(mr, NULL); |
| } |