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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <time.h> |
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#include <errno.h> |
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#include <sys/time.h> |
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#include <zlib.h> |
30 |
|
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/* Needed early for CONFIG_BSD etc. */
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#include "config-host.h" |
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#ifndef _WIN32
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#include <sys/times.h> |
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#include <sys/wait.h> |
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#include <termios.h> |
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#include <sys/mman.h> |
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#include <sys/ioctl.h> |
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#include <sys/resource.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <net/if.h> |
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#include <arpa/inet.h> |
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#include <dirent.h> |
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#include <netdb.h> |
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#include <sys/select.h> |
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#ifdef CONFIG_BSD
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#include <sys/stat.h> |
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
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#include <libutil.h> |
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#else
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#include <util.h> |
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#endif
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#ifdef __linux__
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#include <pty.h> |
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#include <malloc.h> |
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#include <linux/rtc.h> |
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#endif
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#endif
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#endif
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|
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#ifdef _WIN32
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#include <windows.h> |
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#include <malloc.h> |
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#include <sys/timeb.h> |
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#include <mmsystem.h> |
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#define getopt_long_only getopt_long
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#define memalign(align, size) malloc(size)
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#endif
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|
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#include "qemu-common.h" |
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#include "hw/hw.h" |
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#include "hw/qdev.h" |
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#include "net.h" |
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#include "monitor.h" |
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#include "sysemu.h" |
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#include "qemu-timer.h" |
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#include "qemu-char.h" |
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#include "audio/audio.h" |
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#include "migration.h" |
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#include "qemu_socket.h" |
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#include "qemu-queue.h" |
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#include "qemu-timer.h" |
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#include "cpus.h" |
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|
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#define SELF_ANNOUNCE_ROUNDS 5 |
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#ifndef ETH_P_RARP
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#define ETH_P_RARP 0x8035 |
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#endif
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#define ARP_HTYPE_ETH 0x0001 |
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#define ARP_PTYPE_IP 0x0800 |
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#define ARP_OP_REQUEST_REV 0x3 |
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|
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static int announce_self_create(uint8_t *buf, |
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uint8_t *mac_addr) |
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{ |
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/* Ethernet header. */
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memset(buf, 0xff, 6); /* destination MAC addr */ |
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memcpy(buf + 6, mac_addr, 6); /* source MAC addr */ |
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*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */ |
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|
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/* RARP header. */
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*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */ |
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*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */ |
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*(buf + 18) = 6; /* hardware addr length (ethernet) */ |
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*(buf + 19) = 4; /* protocol addr length (IPv4) */ |
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*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */ |
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memcpy(buf + 22, mac_addr, 6); /* source hw addr */ |
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memset(buf + 28, 0x00, 4); /* source protocol addr */ |
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memcpy(buf + 32, mac_addr, 6); /* target hw addr */ |
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memset(buf + 38, 0x00, 4); /* target protocol addr */ |
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/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
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memset(buf + 42, 0x00, 18); |
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return 60; /* len (FCS will be added by hardware) */ |
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} |
120 |
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static void qemu_announce_self_iter(NICState *nic, void *opaque) |
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{ |
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uint8_t buf[60];
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int len;
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len = announce_self_create(buf, nic->conf->macaddr.a); |
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qemu_send_packet_raw(&nic->nc, buf, len); |
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} |
130 |
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static void qemu_announce_self_once(void *opaque) |
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{ |
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static int count = SELF_ANNOUNCE_ROUNDS; |
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QEMUTimer *timer = *(QEMUTimer **)opaque; |
136 |
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qemu_foreach_nic(qemu_announce_self_iter, NULL);
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|
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if (--count) {
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/* delay 50ms, 150ms, 250ms, ... */
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qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) + |
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50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100); |
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} else {
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qemu_del_timer(timer); |
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qemu_free_timer(timer); |
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} |
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} |
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void qemu_announce_self(void) |
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{ |
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static QEMUTimer *timer;
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timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer); |
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qemu_announce_self_once(&timer); |
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} |
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/***********************************************************/
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/* savevm/loadvm support */
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#define IO_BUF_SIZE 32768 |
160 |
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struct QEMUFile {
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QEMUFilePutBufferFunc *put_buffer; |
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QEMUFileGetBufferFunc *get_buffer; |
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QEMUFileCloseFunc *close; |
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QEMUFileRateLimit *rate_limit; |
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QEMUFileSetRateLimit *set_rate_limit; |
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QEMUFileGetRateLimit *get_rate_limit; |
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void *opaque;
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int is_write;
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int64_t buf_offset; /* start of buffer when writing, end of buffer
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when reading */
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int buf_index;
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int buf_size; /* 0 when writing */ |
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uint8_t buf[IO_BUF_SIZE]; |
176 |
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int last_error;
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}; |
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typedef struct QEMUFileStdio |
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{ |
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FILE *stdio_file; |
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QEMUFile *file; |
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} QEMUFileStdio; |
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|
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typedef struct QEMUFileSocket |
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{ |
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int fd;
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QEMUFile *file; |
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} QEMUFileSocket; |
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static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileSocket *s = opaque; |
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ssize_t len; |
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do {
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len = qemu_recv(s->fd, buf, size, 0);
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} while (len == -1 && socket_error() == EINTR); |
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if (len == -1) |
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len = -socket_error(); |
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return len;
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} |
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static int socket_close(void *opaque) |
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{ |
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QEMUFileSocket *s = opaque; |
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g_free(s); |
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return 0; |
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} |
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static int stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileStdio *s = opaque; |
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return fwrite(buf, 1, size, s->stdio_file); |
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} |
219 |
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static int stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
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{ |
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QEMUFileStdio *s = opaque; |
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FILE *fp = s->stdio_file; |
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int bytes;
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do {
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clearerr(fp); |
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bytes = fread(buf, 1, size, fp);
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} while ((bytes == 0) && ferror(fp) && (errno == EINTR)); |
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return bytes;
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} |
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static int stdio_pclose(void *opaque) |
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{ |
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QEMUFileStdio *s = opaque; |
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int ret;
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ret = pclose(s->stdio_file); |
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g_free(s); |
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return ret;
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} |
241 |
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static int stdio_fclose(void *opaque) |
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{ |
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QEMUFileStdio *s = opaque; |
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fclose(s->stdio_file); |
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g_free(s); |
247 |
return 0; |
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} |
249 |
|
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QEMUFile *qemu_popen(FILE *stdio_file, const char *mode) |
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{ |
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QEMUFileStdio *s; |
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|
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if (stdio_file == NULL || mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) { |
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fprintf(stderr, "qemu_popen: Argument validity check failed\n");
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return NULL; |
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} |
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s = g_malloc0(sizeof(QEMUFileStdio));
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s->stdio_file = stdio_file; |
262 |
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if(mode[0] == 'r') { |
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s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_pclose,
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NULL, NULL, NULL); |
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} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_pclose,
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NULL, NULL, NULL); |
269 |
} |
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return s->file;
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} |
272 |
|
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QEMUFile *qemu_popen_cmd(const char *command, const char *mode) |
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{ |
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FILE *popen_file; |
276 |
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popen_file = popen(command, mode); |
278 |
if(popen_file == NULL) { |
279 |
return NULL; |
280 |
} |
281 |
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return qemu_popen(popen_file, mode);
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} |
284 |
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int qemu_stdio_fd(QEMUFile *f)
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{ |
287 |
QEMUFileStdio *p; |
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int fd;
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p = (QEMUFileStdio *)f->opaque; |
291 |
fd = fileno(p->stdio_file); |
292 |
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return fd;
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} |
295 |
|
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QEMUFile *qemu_fdopen(int fd, const char *mode) |
297 |
{ |
298 |
QEMUFileStdio *s; |
299 |
|
300 |
if (mode == NULL || |
301 |
(mode[0] != 'r' && mode[0] != 'w') || |
302 |
mode[1] != 'b' || mode[2] != 0) { |
303 |
fprintf(stderr, "qemu_fdopen: Argument validity check failed\n");
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return NULL; |
305 |
} |
306 |
|
307 |
s = g_malloc0(sizeof(QEMUFileStdio));
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s->stdio_file = fdopen(fd, mode); |
309 |
if (!s->stdio_file)
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goto fail;
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311 |
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312 |
if(mode[0] == 'r') { |
313 |
s->file = qemu_fopen_ops(s, NULL, stdio_get_buffer, stdio_fclose,
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NULL, NULL, NULL); |
315 |
} else {
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s->file = qemu_fopen_ops(s, stdio_put_buffer, NULL, stdio_fclose,
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NULL, NULL, NULL); |
318 |
} |
319 |
return s->file;
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320 |
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321 |
fail:
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g_free(s); |
323 |
return NULL; |
324 |
} |
325 |
|
326 |
QEMUFile *qemu_fopen_socket(int fd)
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327 |
{ |
328 |
QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
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329 |
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330 |
s->fd = fd; |
331 |
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
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NULL, NULL, NULL); |
333 |
return s->file;
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} |
335 |
|
336 |
static int file_put_buffer(void *opaque, const uint8_t *buf, |
337 |
int64_t pos, int size)
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{ |
339 |
QEMUFileStdio *s = opaque; |
340 |
fseek(s->stdio_file, pos, SEEK_SET); |
341 |
return fwrite(buf, 1, size, s->stdio_file); |
342 |
} |
343 |
|
344 |
static int file_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
345 |
{ |
346 |
QEMUFileStdio *s = opaque; |
347 |
fseek(s->stdio_file, pos, SEEK_SET); |
348 |
return fread(buf, 1, size, s->stdio_file); |
349 |
} |
350 |
|
351 |
QEMUFile *qemu_fopen(const char *filename, const char *mode) |
352 |
{ |
353 |
QEMUFileStdio *s; |
354 |
|
355 |
if (mode == NULL || |
356 |
(mode[0] != 'r' && mode[0] != 'w') || |
357 |
mode[1] != 'b' || mode[2] != 0) { |
358 |
fprintf(stderr, "qemu_fopen: Argument validity check failed\n");
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359 |
return NULL; |
360 |
} |
361 |
|
362 |
s = g_malloc0(sizeof(QEMUFileStdio));
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363 |
|
364 |
s->stdio_file = fopen(filename, mode); |
365 |
if (!s->stdio_file)
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366 |
goto fail;
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367 |
|
368 |
if(mode[0] == 'w') { |
369 |
s->file = qemu_fopen_ops(s, file_put_buffer, NULL, stdio_fclose,
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370 |
NULL, NULL, NULL); |
371 |
} else {
|
372 |
s->file = qemu_fopen_ops(s, NULL, file_get_buffer, stdio_fclose,
|
373 |
NULL, NULL, NULL); |
374 |
} |
375 |
return s->file;
|
376 |
fail:
|
377 |
g_free(s); |
378 |
return NULL; |
379 |
} |
380 |
|
381 |
static int block_put_buffer(void *opaque, const uint8_t *buf, |
382 |
int64_t pos, int size)
|
383 |
{ |
384 |
bdrv_save_vmstate(opaque, buf, pos, size); |
385 |
return size;
|
386 |
} |
387 |
|
388 |
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size) |
389 |
{ |
390 |
return bdrv_load_vmstate(opaque, buf, pos, size);
|
391 |
} |
392 |
|
393 |
static int bdrv_fclose(void *opaque) |
394 |
{ |
395 |
return 0; |
396 |
} |
397 |
|
398 |
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable) |
399 |
{ |
400 |
if (is_writable)
|
401 |
return qemu_fopen_ops(bs, block_put_buffer, NULL, bdrv_fclose, |
402 |
NULL, NULL, NULL); |
403 |
return qemu_fopen_ops(bs, NULL, block_get_buffer, bdrv_fclose, NULL, NULL, NULL); |
404 |
} |
405 |
|
406 |
QEMUFile *qemu_fopen_ops(void *opaque, QEMUFilePutBufferFunc *put_buffer,
|
407 |
QEMUFileGetBufferFunc *get_buffer, |
408 |
QEMUFileCloseFunc *close, |
409 |
QEMUFileRateLimit *rate_limit, |
410 |
QEMUFileSetRateLimit *set_rate_limit, |
411 |
QEMUFileGetRateLimit *get_rate_limit) |
412 |
{ |
413 |
QEMUFile *f; |
414 |
|
415 |
f = g_malloc0(sizeof(QEMUFile));
|
416 |
|
417 |
f->opaque = opaque; |
418 |
f->put_buffer = put_buffer; |
419 |
f->get_buffer = get_buffer; |
420 |
f->close = close; |
421 |
f->rate_limit = rate_limit; |
422 |
f->set_rate_limit = set_rate_limit; |
423 |
f->get_rate_limit = get_rate_limit; |
424 |
f->is_write = 0;
|
425 |
|
426 |
return f;
|
427 |
} |
428 |
|
429 |
int qemu_file_get_error(QEMUFile *f)
|
430 |
{ |
431 |
return f->last_error;
|
432 |
} |
433 |
|
434 |
void qemu_file_set_error(QEMUFile *f, int ret) |
435 |
{ |
436 |
f->last_error = ret; |
437 |
} |
438 |
|
439 |
void qemu_fflush(QEMUFile *f)
|
440 |
{ |
441 |
if (!f->put_buffer)
|
442 |
return;
|
443 |
|
444 |
if (f->is_write && f->buf_index > 0) { |
445 |
int len;
|
446 |
|
447 |
len = f->put_buffer(f->opaque, f->buf, f->buf_offset, f->buf_index); |
448 |
if (len > 0) |
449 |
f->buf_offset += f->buf_index; |
450 |
else
|
451 |
f->last_error = -EINVAL; |
452 |
f->buf_index = 0;
|
453 |
} |
454 |
} |
455 |
|
456 |
static void qemu_fill_buffer(QEMUFile *f) |
457 |
{ |
458 |
int len;
|
459 |
int pending;
|
460 |
|
461 |
if (!f->get_buffer)
|
462 |
return;
|
463 |
|
464 |
if (f->is_write)
|
465 |
abort(); |
466 |
|
467 |
pending = f->buf_size - f->buf_index; |
468 |
if (pending > 0) { |
469 |
memmove(f->buf, f->buf + f->buf_index, pending); |
470 |
} |
471 |
f->buf_index = 0;
|
472 |
f->buf_size = pending; |
473 |
|
474 |
len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset, |
475 |
IO_BUF_SIZE - pending); |
476 |
if (len > 0) { |
477 |
f->buf_size += len; |
478 |
f->buf_offset += len; |
479 |
} else if (len == 0) { |
480 |
f->last_error = -EIO; |
481 |
} else if (len != -EAGAIN) |
482 |
f->last_error = len; |
483 |
} |
484 |
|
485 |
int qemu_fclose(QEMUFile *f)
|
486 |
{ |
487 |
int ret = 0; |
488 |
qemu_fflush(f); |
489 |
if (f->close)
|
490 |
ret = f->close(f->opaque); |
491 |
g_free(f); |
492 |
return ret;
|
493 |
} |
494 |
|
495 |
void qemu_file_put_notify(QEMUFile *f)
|
496 |
{ |
497 |
f->put_buffer(f->opaque, NULL, 0, 0); |
498 |
} |
499 |
|
500 |
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size) |
501 |
{ |
502 |
int l;
|
503 |
|
504 |
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
505 |
fprintf(stderr, |
506 |
"Attempted to write to buffer while read buffer is not empty\n");
|
507 |
abort(); |
508 |
} |
509 |
|
510 |
while (!f->last_error && size > 0) { |
511 |
l = IO_BUF_SIZE - f->buf_index; |
512 |
if (l > size)
|
513 |
l = size; |
514 |
memcpy(f->buf + f->buf_index, buf, l); |
515 |
f->is_write = 1;
|
516 |
f->buf_index += l; |
517 |
buf += l; |
518 |
size -= l; |
519 |
if (f->buf_index >= IO_BUF_SIZE)
|
520 |
qemu_fflush(f); |
521 |
} |
522 |
} |
523 |
|
524 |
void qemu_put_byte(QEMUFile *f, int v) |
525 |
{ |
526 |
if (!f->last_error && f->is_write == 0 && f->buf_index > 0) { |
527 |
fprintf(stderr, |
528 |
"Attempted to write to buffer while read buffer is not empty\n");
|
529 |
abort(); |
530 |
} |
531 |
|
532 |
f->buf[f->buf_index++] = v; |
533 |
f->is_write = 1;
|
534 |
if (f->buf_index >= IO_BUF_SIZE)
|
535 |
qemu_fflush(f); |
536 |
} |
537 |
|
538 |
static void qemu_file_skip(QEMUFile *f, int size) |
539 |
{ |
540 |
if (f->buf_index + size <= f->buf_size) {
|
541 |
f->buf_index += size; |
542 |
} |
543 |
} |
544 |
|
545 |
static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset) |
546 |
{ |
547 |
int pending;
|
548 |
int index;
|
549 |
|
550 |
if (f->is_write) {
|
551 |
abort(); |
552 |
} |
553 |
|
554 |
index = f->buf_index + offset; |
555 |
pending = f->buf_size - index; |
556 |
if (pending < size) {
|
557 |
qemu_fill_buffer(f); |
558 |
index = f->buf_index + offset; |
559 |
pending = f->buf_size - index; |
560 |
} |
561 |
|
562 |
if (pending <= 0) { |
563 |
return 0; |
564 |
} |
565 |
if (size > pending) {
|
566 |
size = pending; |
567 |
} |
568 |
|
569 |
memcpy(buf, f->buf + index, size); |
570 |
return size;
|
571 |
} |
572 |
|
573 |
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size) |
574 |
{ |
575 |
int pending = size;
|
576 |
int done = 0; |
577 |
|
578 |
while (pending > 0) { |
579 |
int res;
|
580 |
|
581 |
res = qemu_peek_buffer(f, buf, pending, 0);
|
582 |
if (res == 0) { |
583 |
return done;
|
584 |
} |
585 |
qemu_file_skip(f, res); |
586 |
buf += res; |
587 |
pending -= res; |
588 |
done += res; |
589 |
} |
590 |
return done;
|
591 |
} |
592 |
|
593 |
static int qemu_peek_byte(QEMUFile *f, int offset) |
594 |
{ |
595 |
int index = f->buf_index + offset;
|
596 |
|
597 |
if (f->is_write) {
|
598 |
abort(); |
599 |
} |
600 |
|
601 |
if (index >= f->buf_size) {
|
602 |
qemu_fill_buffer(f); |
603 |
index = f->buf_index + offset; |
604 |
if (index >= f->buf_size) {
|
605 |
return 0; |
606 |
} |
607 |
} |
608 |
return f->buf[index];
|
609 |
} |
610 |
|
611 |
int qemu_get_byte(QEMUFile *f)
|
612 |
{ |
613 |
int result;
|
614 |
|
615 |
result = qemu_peek_byte(f, 0);
|
616 |
qemu_file_skip(f, 1);
|
617 |
return result;
|
618 |
} |
619 |
|
620 |
int64_t qemu_ftell(QEMUFile *f) |
621 |
{ |
622 |
return f->buf_offset - f->buf_size + f->buf_index;
|
623 |
} |
624 |
|
625 |
int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence)
|
626 |
{ |
627 |
if (whence == SEEK_SET) {
|
628 |
/* nothing to do */
|
629 |
} else if (whence == SEEK_CUR) { |
630 |
pos += qemu_ftell(f); |
631 |
} else {
|
632 |
/* SEEK_END not supported */
|
633 |
return -1; |
634 |
} |
635 |
if (f->put_buffer) {
|
636 |
qemu_fflush(f); |
637 |
f->buf_offset = pos; |
638 |
} else {
|
639 |
f->buf_offset = pos; |
640 |
f->buf_index = 0;
|
641 |
f->buf_size = 0;
|
642 |
} |
643 |
return pos;
|
644 |
} |
645 |
|
646 |
int qemu_file_rate_limit(QEMUFile *f)
|
647 |
{ |
648 |
if (f->rate_limit)
|
649 |
return f->rate_limit(f->opaque);
|
650 |
|
651 |
return 0; |
652 |
} |
653 |
|
654 |
int64_t qemu_file_get_rate_limit(QEMUFile *f) |
655 |
{ |
656 |
if (f->get_rate_limit)
|
657 |
return f->get_rate_limit(f->opaque);
|
658 |
|
659 |
return 0; |
660 |
} |
661 |
|
662 |
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate) |
663 |
{ |
664 |
/* any failed or completed migration keeps its state to allow probing of
|
665 |
* migration data, but has no associated file anymore */
|
666 |
if (f && f->set_rate_limit)
|
667 |
return f->set_rate_limit(f->opaque, new_rate);
|
668 |
|
669 |
return 0; |
670 |
} |
671 |
|
672 |
void qemu_put_be16(QEMUFile *f, unsigned int v) |
673 |
{ |
674 |
qemu_put_byte(f, v >> 8);
|
675 |
qemu_put_byte(f, v); |
676 |
} |
677 |
|
678 |
void qemu_put_be32(QEMUFile *f, unsigned int v) |
679 |
{ |
680 |
qemu_put_byte(f, v >> 24);
|
681 |
qemu_put_byte(f, v >> 16);
|
682 |
qemu_put_byte(f, v >> 8);
|
683 |
qemu_put_byte(f, v); |
684 |
} |
685 |
|
686 |
void qemu_put_be64(QEMUFile *f, uint64_t v)
|
687 |
{ |
688 |
qemu_put_be32(f, v >> 32);
|
689 |
qemu_put_be32(f, v); |
690 |
} |
691 |
|
692 |
unsigned int qemu_get_be16(QEMUFile *f) |
693 |
{ |
694 |
unsigned int v; |
695 |
v = qemu_get_byte(f) << 8;
|
696 |
v |= qemu_get_byte(f); |
697 |
return v;
|
698 |
} |
699 |
|
700 |
unsigned int qemu_get_be32(QEMUFile *f) |
701 |
{ |
702 |
unsigned int v; |
703 |
v = qemu_get_byte(f) << 24;
|
704 |
v |= qemu_get_byte(f) << 16;
|
705 |
v |= qemu_get_byte(f) << 8;
|
706 |
v |= qemu_get_byte(f); |
707 |
return v;
|
708 |
} |
709 |
|
710 |
uint64_t qemu_get_be64(QEMUFile *f) |
711 |
{ |
712 |
uint64_t v; |
713 |
v = (uint64_t)qemu_get_be32(f) << 32;
|
714 |
v |= qemu_get_be32(f); |
715 |
return v;
|
716 |
} |
717 |
|
718 |
|
719 |
/* timer */
|
720 |
|
721 |
void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
|
722 |
{ |
723 |
uint64_t expire_time; |
724 |
|
725 |
expire_time = qemu_timer_expire_time_ns(ts); |
726 |
qemu_put_be64(f, expire_time); |
727 |
} |
728 |
|
729 |
void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
|
730 |
{ |
731 |
uint64_t expire_time; |
732 |
|
733 |
expire_time = qemu_get_be64(f); |
734 |
if (expire_time != -1) { |
735 |
qemu_mod_timer_ns(ts, expire_time); |
736 |
} else {
|
737 |
qemu_del_timer(ts); |
738 |
} |
739 |
} |
740 |
|
741 |
|
742 |
/* bool */
|
743 |
|
744 |
static int get_bool(QEMUFile *f, void *pv, size_t size) |
745 |
{ |
746 |
bool *v = pv;
|
747 |
*v = qemu_get_byte(f); |
748 |
return 0; |
749 |
} |
750 |
|
751 |
static void put_bool(QEMUFile *f, void *pv, size_t size) |
752 |
{ |
753 |
bool *v = pv;
|
754 |
qemu_put_byte(f, *v); |
755 |
} |
756 |
|
757 |
const VMStateInfo vmstate_info_bool = {
|
758 |
.name = "bool",
|
759 |
.get = get_bool, |
760 |
.put = put_bool, |
761 |
}; |
762 |
|
763 |
/* 8 bit int */
|
764 |
|
765 |
static int get_int8(QEMUFile *f, void *pv, size_t size) |
766 |
{ |
767 |
int8_t *v = pv; |
768 |
qemu_get_s8s(f, v); |
769 |
return 0; |
770 |
} |
771 |
|
772 |
static void put_int8(QEMUFile *f, void *pv, size_t size) |
773 |
{ |
774 |
int8_t *v = pv; |
775 |
qemu_put_s8s(f, v); |
776 |
} |
777 |
|
778 |
const VMStateInfo vmstate_info_int8 = {
|
779 |
.name = "int8",
|
780 |
.get = get_int8, |
781 |
.put = put_int8, |
782 |
}; |
783 |
|
784 |
/* 16 bit int */
|
785 |
|
786 |
static int get_int16(QEMUFile *f, void *pv, size_t size) |
787 |
{ |
788 |
int16_t *v = pv; |
789 |
qemu_get_sbe16s(f, v); |
790 |
return 0; |
791 |
} |
792 |
|
793 |
static void put_int16(QEMUFile *f, void *pv, size_t size) |
794 |
{ |
795 |
int16_t *v = pv; |
796 |
qemu_put_sbe16s(f, v); |
797 |
} |
798 |
|
799 |
const VMStateInfo vmstate_info_int16 = {
|
800 |
.name = "int16",
|
801 |
.get = get_int16, |
802 |
.put = put_int16, |
803 |
}; |
804 |
|
805 |
/* 32 bit int */
|
806 |
|
807 |
static int get_int32(QEMUFile *f, void *pv, size_t size) |
808 |
{ |
809 |
int32_t *v = pv; |
810 |
qemu_get_sbe32s(f, v); |
811 |
return 0; |
812 |
} |
813 |
|
814 |
static void put_int32(QEMUFile *f, void *pv, size_t size) |
815 |
{ |
816 |
int32_t *v = pv; |
817 |
qemu_put_sbe32s(f, v); |
818 |
} |
819 |
|
820 |
const VMStateInfo vmstate_info_int32 = {
|
821 |
.name = "int32",
|
822 |
.get = get_int32, |
823 |
.put = put_int32, |
824 |
}; |
825 |
|
826 |
/* 32 bit int. See that the received value is the same than the one
|
827 |
in the field */
|
828 |
|
829 |
static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
830 |
{ |
831 |
int32_t *v = pv; |
832 |
int32_t v2; |
833 |
qemu_get_sbe32s(f, &v2); |
834 |
|
835 |
if (*v == v2)
|
836 |
return 0; |
837 |
return -EINVAL;
|
838 |
} |
839 |
|
840 |
const VMStateInfo vmstate_info_int32_equal = {
|
841 |
.name = "int32 equal",
|
842 |
.get = get_int32_equal, |
843 |
.put = put_int32, |
844 |
}; |
845 |
|
846 |
/* 32 bit int. See that the received value is the less or the same
|
847 |
than the one in the field */
|
848 |
|
849 |
static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
850 |
{ |
851 |
int32_t *old = pv; |
852 |
int32_t new; |
853 |
qemu_get_sbe32s(f, &new); |
854 |
|
855 |
if (*old <= new)
|
856 |
return 0; |
857 |
return -EINVAL;
|
858 |
} |
859 |
|
860 |
const VMStateInfo vmstate_info_int32_le = {
|
861 |
.name = "int32 equal",
|
862 |
.get = get_int32_le, |
863 |
.put = put_int32, |
864 |
}; |
865 |
|
866 |
/* 64 bit int */
|
867 |
|
868 |
static int get_int64(QEMUFile *f, void *pv, size_t size) |
869 |
{ |
870 |
int64_t *v = pv; |
871 |
qemu_get_sbe64s(f, v); |
872 |
return 0; |
873 |
} |
874 |
|
875 |
static void put_int64(QEMUFile *f, void *pv, size_t size) |
876 |
{ |
877 |
int64_t *v = pv; |
878 |
qemu_put_sbe64s(f, v); |
879 |
} |
880 |
|
881 |
const VMStateInfo vmstate_info_int64 = {
|
882 |
.name = "int64",
|
883 |
.get = get_int64, |
884 |
.put = put_int64, |
885 |
}; |
886 |
|
887 |
/* 8 bit unsigned int */
|
888 |
|
889 |
static int get_uint8(QEMUFile *f, void *pv, size_t size) |
890 |
{ |
891 |
uint8_t *v = pv; |
892 |
qemu_get_8s(f, v); |
893 |
return 0; |
894 |
} |
895 |
|
896 |
static void put_uint8(QEMUFile *f, void *pv, size_t size) |
897 |
{ |
898 |
uint8_t *v = pv; |
899 |
qemu_put_8s(f, v); |
900 |
} |
901 |
|
902 |
const VMStateInfo vmstate_info_uint8 = {
|
903 |
.name = "uint8",
|
904 |
.get = get_uint8, |
905 |
.put = put_uint8, |
906 |
}; |
907 |
|
908 |
/* 16 bit unsigned int */
|
909 |
|
910 |
static int get_uint16(QEMUFile *f, void *pv, size_t size) |
911 |
{ |
912 |
uint16_t *v = pv; |
913 |
qemu_get_be16s(f, v); |
914 |
return 0; |
915 |
} |
916 |
|
917 |
static void put_uint16(QEMUFile *f, void *pv, size_t size) |
918 |
{ |
919 |
uint16_t *v = pv; |
920 |
qemu_put_be16s(f, v); |
921 |
} |
922 |
|
923 |
const VMStateInfo vmstate_info_uint16 = {
|
924 |
.name = "uint16",
|
925 |
.get = get_uint16, |
926 |
.put = put_uint16, |
927 |
}; |
928 |
|
929 |
/* 32 bit unsigned int */
|
930 |
|
931 |
static int get_uint32(QEMUFile *f, void *pv, size_t size) |
932 |
{ |
933 |
uint32_t *v = pv; |
934 |
qemu_get_be32s(f, v); |
935 |
return 0; |
936 |
} |
937 |
|
938 |
static void put_uint32(QEMUFile *f, void *pv, size_t size) |
939 |
{ |
940 |
uint32_t *v = pv; |
941 |
qemu_put_be32s(f, v); |
942 |
} |
943 |
|
944 |
const VMStateInfo vmstate_info_uint32 = {
|
945 |
.name = "uint32",
|
946 |
.get = get_uint32, |
947 |
.put = put_uint32, |
948 |
}; |
949 |
|
950 |
/* 32 bit uint. See that the received value is the same than the one
|
951 |
in the field */
|
952 |
|
953 |
static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
954 |
{ |
955 |
uint32_t *v = pv; |
956 |
uint32_t v2; |
957 |
qemu_get_be32s(f, &v2); |
958 |
|
959 |
if (*v == v2) {
|
960 |
return 0; |
961 |
} |
962 |
return -EINVAL;
|
963 |
} |
964 |
|
965 |
const VMStateInfo vmstate_info_uint32_equal = {
|
966 |
.name = "uint32 equal",
|
967 |
.get = get_uint32_equal, |
968 |
.put = put_uint32, |
969 |
}; |
970 |
|
971 |
/* 64 bit unsigned int */
|
972 |
|
973 |
static int get_uint64(QEMUFile *f, void *pv, size_t size) |
974 |
{ |
975 |
uint64_t *v = pv; |
976 |
qemu_get_be64s(f, v); |
977 |
return 0; |
978 |
} |
979 |
|
980 |
static void put_uint64(QEMUFile *f, void *pv, size_t size) |
981 |
{ |
982 |
uint64_t *v = pv; |
983 |
qemu_put_be64s(f, v); |
984 |
} |
985 |
|
986 |
const VMStateInfo vmstate_info_uint64 = {
|
987 |
.name = "uint64",
|
988 |
.get = get_uint64, |
989 |
.put = put_uint64, |
990 |
}; |
991 |
|
992 |
/* 8 bit int. See that the received value is the same than the one
|
993 |
in the field */
|
994 |
|
995 |
static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
996 |
{ |
997 |
uint8_t *v = pv; |
998 |
uint8_t v2; |
999 |
qemu_get_8s(f, &v2); |
1000 |
|
1001 |
if (*v == v2)
|
1002 |
return 0; |
1003 |
return -EINVAL;
|
1004 |
} |
1005 |
|
1006 |
const VMStateInfo vmstate_info_uint8_equal = {
|
1007 |
.name = "uint8 equal",
|
1008 |
.get = get_uint8_equal, |
1009 |
.put = put_uint8, |
1010 |
}; |
1011 |
|
1012 |
/* 16 bit unsigned int int. See that the received value is the same than the one
|
1013 |
in the field */
|
1014 |
|
1015 |
static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
1016 |
{ |
1017 |
uint16_t *v = pv; |
1018 |
uint16_t v2; |
1019 |
qemu_get_be16s(f, &v2); |
1020 |
|
1021 |
if (*v == v2)
|
1022 |
return 0; |
1023 |
return -EINVAL;
|
1024 |
} |
1025 |
|
1026 |
const VMStateInfo vmstate_info_uint16_equal = {
|
1027 |
.name = "uint16 equal",
|
1028 |
.get = get_uint16_equal, |
1029 |
.put = put_uint16, |
1030 |
}; |
1031 |
|
1032 |
/* timers */
|
1033 |
|
1034 |
static int get_timer(QEMUFile *f, void *pv, size_t size) |
1035 |
{ |
1036 |
QEMUTimer *v = pv; |
1037 |
qemu_get_timer(f, v); |
1038 |
return 0; |
1039 |
} |
1040 |
|
1041 |
static void put_timer(QEMUFile *f, void *pv, size_t size) |
1042 |
{ |
1043 |
QEMUTimer *v = pv; |
1044 |
qemu_put_timer(f, v); |
1045 |
} |
1046 |
|
1047 |
const VMStateInfo vmstate_info_timer = {
|
1048 |
.name = "timer",
|
1049 |
.get = get_timer, |
1050 |
.put = put_timer, |
1051 |
}; |
1052 |
|
1053 |
/* uint8_t buffers */
|
1054 |
|
1055 |
static int get_buffer(QEMUFile *f, void *pv, size_t size) |
1056 |
{ |
1057 |
uint8_t *v = pv; |
1058 |
qemu_get_buffer(f, v, size); |
1059 |
return 0; |
1060 |
} |
1061 |
|
1062 |
static void put_buffer(QEMUFile *f, void *pv, size_t size) |
1063 |
{ |
1064 |
uint8_t *v = pv; |
1065 |
qemu_put_buffer(f, v, size); |
1066 |
} |
1067 |
|
1068 |
const VMStateInfo vmstate_info_buffer = {
|
1069 |
.name = "buffer",
|
1070 |
.get = get_buffer, |
1071 |
.put = put_buffer, |
1072 |
}; |
1073 |
|
1074 |
/* unused buffers: space that was used for some fields that are
|
1075 |
not useful anymore */
|
1076 |
|
1077 |
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1078 |
{ |
1079 |
uint8_t buf[1024];
|
1080 |
int block_len;
|
1081 |
|
1082 |
while (size > 0) { |
1083 |
block_len = MIN(sizeof(buf), size);
|
1084 |
size -= block_len; |
1085 |
qemu_get_buffer(f, buf, block_len); |
1086 |
} |
1087 |
return 0; |
1088 |
} |
1089 |
|
1090 |
static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
1091 |
{ |
1092 |
static const uint8_t buf[1024]; |
1093 |
int block_len;
|
1094 |
|
1095 |
while (size > 0) { |
1096 |
block_len = MIN(sizeof(buf), size);
|
1097 |
size -= block_len; |
1098 |
qemu_put_buffer(f, buf, block_len); |
1099 |
} |
1100 |
} |
1101 |
|
1102 |
const VMStateInfo vmstate_info_unused_buffer = {
|
1103 |
.name = "unused_buffer",
|
1104 |
.get = get_unused_buffer, |
1105 |
.put = put_unused_buffer, |
1106 |
}; |
1107 |
|
1108 |
typedef struct CompatEntry { |
1109 |
char idstr[256]; |
1110 |
int instance_id;
|
1111 |
} CompatEntry; |
1112 |
|
1113 |
typedef struct SaveStateEntry { |
1114 |
QTAILQ_ENTRY(SaveStateEntry) entry; |
1115 |
char idstr[256]; |
1116 |
int instance_id;
|
1117 |
int alias_id;
|
1118 |
int version_id;
|
1119 |
int section_id;
|
1120 |
SaveSetParamsHandler *set_params; |
1121 |
SaveLiveStateHandler *save_live_state; |
1122 |
SaveStateHandler *save_state; |
1123 |
LoadStateHandler *load_state; |
1124 |
const VMStateDescription *vmsd;
|
1125 |
void *opaque;
|
1126 |
CompatEntry *compat; |
1127 |
int no_migrate;
|
1128 |
} SaveStateEntry; |
1129 |
|
1130 |
|
1131 |
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
1132 |
QTAILQ_HEAD_INITIALIZER(savevm_handlers); |
1133 |
static int global_section_id; |
1134 |
|
1135 |
static int calculate_new_instance_id(const char *idstr) |
1136 |
{ |
1137 |
SaveStateEntry *se; |
1138 |
int instance_id = 0; |
1139 |
|
1140 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1141 |
if (strcmp(idstr, se->idstr) == 0 |
1142 |
&& instance_id <= se->instance_id) { |
1143 |
instance_id = se->instance_id + 1;
|
1144 |
} |
1145 |
} |
1146 |
return instance_id;
|
1147 |
} |
1148 |
|
1149 |
static int calculate_compat_instance_id(const char *idstr) |
1150 |
{ |
1151 |
SaveStateEntry *se; |
1152 |
int instance_id = 0; |
1153 |
|
1154 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1155 |
if (!se->compat)
|
1156 |
continue;
|
1157 |
|
1158 |
if (strcmp(idstr, se->compat->idstr) == 0 |
1159 |
&& instance_id <= se->compat->instance_id) { |
1160 |
instance_id = se->compat->instance_id + 1;
|
1161 |
} |
1162 |
} |
1163 |
return instance_id;
|
1164 |
} |
1165 |
|
1166 |
/* TODO: Individual devices generally have very little idea about the rest
|
1167 |
of the system, so instance_id should be removed/replaced.
|
1168 |
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
1169 |
distinguishing id for all instances of your device class. */
|
1170 |
int register_savevm_live(DeviceState *dev,
|
1171 |
const char *idstr, |
1172 |
int instance_id,
|
1173 |
int version_id,
|
1174 |
SaveSetParamsHandler *set_params, |
1175 |
SaveLiveStateHandler *save_live_state, |
1176 |
SaveStateHandler *save_state, |
1177 |
LoadStateHandler *load_state, |
1178 |
void *opaque)
|
1179 |
{ |
1180 |
SaveStateEntry *se; |
1181 |
|
1182 |
se = g_malloc0(sizeof(SaveStateEntry));
|
1183 |
se->version_id = version_id; |
1184 |
se->section_id = global_section_id++; |
1185 |
se->set_params = set_params; |
1186 |
se->save_live_state = save_live_state; |
1187 |
se->save_state = save_state; |
1188 |
se->load_state = load_state; |
1189 |
se->opaque = opaque; |
1190 |
se->vmsd = NULL;
|
1191 |
se->no_migrate = 0;
|
1192 |
|
1193 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1194 |
char *id = dev->parent_bus->info->get_dev_path(dev);
|
1195 |
if (id) {
|
1196 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1197 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1198 |
g_free(id); |
1199 |
|
1200 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
1201 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
1202 |
se->compat->instance_id = instance_id == -1 ?
|
1203 |
calculate_compat_instance_id(idstr) : instance_id; |
1204 |
instance_id = -1;
|
1205 |
} |
1206 |
} |
1207 |
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
1208 |
|
1209 |
if (instance_id == -1) { |
1210 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1211 |
} else {
|
1212 |
se->instance_id = instance_id; |
1213 |
} |
1214 |
assert(!se->compat || se->instance_id == 0);
|
1215 |
/* add at the end of list */
|
1216 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1217 |
return 0; |
1218 |
} |
1219 |
|
1220 |
int register_savevm(DeviceState *dev,
|
1221 |
const char *idstr, |
1222 |
int instance_id,
|
1223 |
int version_id,
|
1224 |
SaveStateHandler *save_state, |
1225 |
LoadStateHandler *load_state, |
1226 |
void *opaque)
|
1227 |
{ |
1228 |
return register_savevm_live(dev, idstr, instance_id, version_id,
|
1229 |
NULL, NULL, save_state, load_state, opaque); |
1230 |
} |
1231 |
|
1232 |
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque) |
1233 |
{ |
1234 |
SaveStateEntry *se, *new_se; |
1235 |
char id[256] = ""; |
1236 |
|
1237 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1238 |
char *path = dev->parent_bus->info->get_dev_path(dev);
|
1239 |
if (path) {
|
1240 |
pstrcpy(id, sizeof(id), path);
|
1241 |
pstrcat(id, sizeof(id), "/"); |
1242 |
g_free(path); |
1243 |
} |
1244 |
} |
1245 |
pstrcat(id, sizeof(id), idstr);
|
1246 |
|
1247 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1248 |
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) { |
1249 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1250 |
if (se->compat) {
|
1251 |
g_free(se->compat); |
1252 |
} |
1253 |
g_free(se); |
1254 |
} |
1255 |
} |
1256 |
} |
1257 |
|
1258 |
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, |
1259 |
const VMStateDescription *vmsd,
|
1260 |
void *opaque, int alias_id, |
1261 |
int required_for_version)
|
1262 |
{ |
1263 |
SaveStateEntry *se; |
1264 |
|
1265 |
/* If this triggers, alias support can be dropped for the vmsd. */
|
1266 |
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
1267 |
|
1268 |
se = g_malloc0(sizeof(SaveStateEntry));
|
1269 |
se->version_id = vmsd->version_id; |
1270 |
se->section_id = global_section_id++; |
1271 |
se->save_live_state = NULL;
|
1272 |
se->save_state = NULL;
|
1273 |
se->load_state = NULL;
|
1274 |
se->opaque = opaque; |
1275 |
se->vmsd = vmsd; |
1276 |
se->alias_id = alias_id; |
1277 |
se->no_migrate = vmsd->unmigratable; |
1278 |
|
1279 |
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
|
1280 |
char *id = dev->parent_bus->info->get_dev_path(dev);
|
1281 |
if (id) {
|
1282 |
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
1283 |
pstrcat(se->idstr, sizeof(se->idstr), "/"); |
1284 |
g_free(id); |
1285 |
|
1286 |
se->compat = g_malloc0(sizeof(CompatEntry));
|
1287 |
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
1288 |
se->compat->instance_id = instance_id == -1 ?
|
1289 |
calculate_compat_instance_id(vmsd->name) : instance_id; |
1290 |
instance_id = -1;
|
1291 |
} |
1292 |
} |
1293 |
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
1294 |
|
1295 |
if (instance_id == -1) { |
1296 |
se->instance_id = calculate_new_instance_id(se->idstr); |
1297 |
} else {
|
1298 |
se->instance_id = instance_id; |
1299 |
} |
1300 |
assert(!se->compat || se->instance_id == 0);
|
1301 |
/* add at the end of list */
|
1302 |
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry); |
1303 |
return 0; |
1304 |
} |
1305 |
|
1306 |
int vmstate_register(DeviceState *dev, int instance_id, |
1307 |
const VMStateDescription *vmsd, void *opaque) |
1308 |
{ |
1309 |
return vmstate_register_with_alias_id(dev, instance_id, vmsd,
|
1310 |
opaque, -1, 0); |
1311 |
} |
1312 |
|
1313 |
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, |
1314 |
void *opaque)
|
1315 |
{ |
1316 |
SaveStateEntry *se, *new_se; |
1317 |
|
1318 |
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) { |
1319 |
if (se->vmsd == vmsd && se->opaque == opaque) {
|
1320 |
QTAILQ_REMOVE(&savevm_handlers, se, entry); |
1321 |
if (se->compat) {
|
1322 |
g_free(se->compat); |
1323 |
} |
1324 |
g_free(se); |
1325 |
} |
1326 |
} |
1327 |
} |
1328 |
|
1329 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1330 |
void *opaque);
|
1331 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1332 |
void *opaque);
|
1333 |
|
1334 |
int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
1335 |
void *opaque, int version_id) |
1336 |
{ |
1337 |
VMStateField *field = vmsd->fields; |
1338 |
int ret;
|
1339 |
|
1340 |
if (version_id > vmsd->version_id) {
|
1341 |
return -EINVAL;
|
1342 |
} |
1343 |
if (version_id < vmsd->minimum_version_id_old) {
|
1344 |
return -EINVAL;
|
1345 |
} |
1346 |
if (version_id < vmsd->minimum_version_id) {
|
1347 |
return vmsd->load_state_old(f, opaque, version_id);
|
1348 |
} |
1349 |
if (vmsd->pre_load) {
|
1350 |
int ret = vmsd->pre_load(opaque);
|
1351 |
if (ret)
|
1352 |
return ret;
|
1353 |
} |
1354 |
while(field->name) {
|
1355 |
if ((field->field_exists &&
|
1356 |
field->field_exists(opaque, version_id)) || |
1357 |
(!field->field_exists && |
1358 |
field->version_id <= version_id)) { |
1359 |
void *base_addr = opaque + field->offset;
|
1360 |
int i, n_elems = 1; |
1361 |
int size = field->size;
|
1362 |
|
1363 |
if (field->flags & VMS_VBUFFER) {
|
1364 |
size = *(int32_t *)(opaque+field->size_offset); |
1365 |
if (field->flags & VMS_MULTIPLY) {
|
1366 |
size *= field->size; |
1367 |
} |
1368 |
} |
1369 |
if (field->flags & VMS_ARRAY) {
|
1370 |
n_elems = field->num; |
1371 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1372 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1373 |
} else if (field->flags & VMS_VARRAY_UINT32) { |
1374 |
n_elems = *(uint32_t *)(opaque+field->num_offset); |
1375 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1376 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1377 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
1378 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
1379 |
} |
1380 |
if (field->flags & VMS_POINTER) {
|
1381 |
base_addr = *(void **)base_addr + field->start;
|
1382 |
} |
1383 |
for (i = 0; i < n_elems; i++) { |
1384 |
void *addr = base_addr + size * i;
|
1385 |
|
1386 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1387 |
addr = *(void **)addr;
|
1388 |
} |
1389 |
if (field->flags & VMS_STRUCT) {
|
1390 |
ret = vmstate_load_state(f, field->vmsd, addr, field->vmsd->version_id); |
1391 |
} else {
|
1392 |
ret = field->info->get(f, addr, size); |
1393 |
|
1394 |
} |
1395 |
if (ret < 0) { |
1396 |
return ret;
|
1397 |
} |
1398 |
} |
1399 |
} |
1400 |
field++; |
1401 |
} |
1402 |
ret = vmstate_subsection_load(f, vmsd, opaque); |
1403 |
if (ret != 0) { |
1404 |
return ret;
|
1405 |
} |
1406 |
if (vmsd->post_load) {
|
1407 |
return vmsd->post_load(opaque, version_id);
|
1408 |
} |
1409 |
return 0; |
1410 |
} |
1411 |
|
1412 |
void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
1413 |
void *opaque)
|
1414 |
{ |
1415 |
VMStateField *field = vmsd->fields; |
1416 |
|
1417 |
if (vmsd->pre_save) {
|
1418 |
vmsd->pre_save(opaque); |
1419 |
} |
1420 |
while(field->name) {
|
1421 |
if (!field->field_exists ||
|
1422 |
field->field_exists(opaque, vmsd->version_id)) { |
1423 |
void *base_addr = opaque + field->offset;
|
1424 |
int i, n_elems = 1; |
1425 |
int size = field->size;
|
1426 |
|
1427 |
if (field->flags & VMS_VBUFFER) {
|
1428 |
size = *(int32_t *)(opaque+field->size_offset); |
1429 |
if (field->flags & VMS_MULTIPLY) {
|
1430 |
size *= field->size; |
1431 |
} |
1432 |
} |
1433 |
if (field->flags & VMS_ARRAY) {
|
1434 |
n_elems = field->num; |
1435 |
} else if (field->flags & VMS_VARRAY_INT32) { |
1436 |
n_elems = *(int32_t *)(opaque+field->num_offset); |
1437 |
} else if (field->flags & VMS_VARRAY_UINT16) { |
1438 |
n_elems = *(uint16_t *)(opaque+field->num_offset); |
1439 |
} else if (field->flags & VMS_VARRAY_UINT8) { |
1440 |
n_elems = *(uint8_t *)(opaque+field->num_offset); |
1441 |
} |
1442 |
if (field->flags & VMS_POINTER) {
|
1443 |
base_addr = *(void **)base_addr + field->start;
|
1444 |
} |
1445 |
for (i = 0; i < n_elems; i++) { |
1446 |
void *addr = base_addr + size * i;
|
1447 |
|
1448 |
if (field->flags & VMS_ARRAY_OF_POINTER) {
|
1449 |
addr = *(void **)addr;
|
1450 |
} |
1451 |
if (field->flags & VMS_STRUCT) {
|
1452 |
vmstate_save_state(f, field->vmsd, addr); |
1453 |
} else {
|
1454 |
field->info->put(f, addr, size); |
1455 |
} |
1456 |
} |
1457 |
} |
1458 |
field++; |
1459 |
} |
1460 |
vmstate_subsection_save(f, vmsd, opaque); |
1461 |
} |
1462 |
|
1463 |
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id) |
1464 |
{ |
1465 |
if (!se->vmsd) { /* Old style */ |
1466 |
return se->load_state(f, se->opaque, version_id);
|
1467 |
} |
1468 |
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
1469 |
} |
1470 |
|
1471 |
static void vmstate_save(QEMUFile *f, SaveStateEntry *se) |
1472 |
{ |
1473 |
if (!se->vmsd) { /* Old style */ |
1474 |
se->save_state(f, se->opaque); |
1475 |
return;
|
1476 |
} |
1477 |
vmstate_save_state(f,se->vmsd, se->opaque); |
1478 |
} |
1479 |
|
1480 |
#define QEMU_VM_FILE_MAGIC 0x5145564d |
1481 |
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 |
1482 |
#define QEMU_VM_FILE_VERSION 0x00000003 |
1483 |
|
1484 |
#define QEMU_VM_EOF 0x00 |
1485 |
#define QEMU_VM_SECTION_START 0x01 |
1486 |
#define QEMU_VM_SECTION_PART 0x02 |
1487 |
#define QEMU_VM_SECTION_END 0x03 |
1488 |
#define QEMU_VM_SECTION_FULL 0x04 |
1489 |
#define QEMU_VM_SUBSECTION 0x05 |
1490 |
|
1491 |
bool qemu_savevm_state_blocked(Monitor *mon)
|
1492 |
{ |
1493 |
SaveStateEntry *se; |
1494 |
|
1495 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1496 |
if (se->no_migrate) {
|
1497 |
monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
|
1498 |
se->idstr); |
1499 |
return true; |
1500 |
} |
1501 |
} |
1502 |
return false; |
1503 |
} |
1504 |
|
1505 |
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable, |
1506 |
int shared)
|
1507 |
{ |
1508 |
SaveStateEntry *se; |
1509 |
int ret;
|
1510 |
|
1511 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1512 |
if(se->set_params == NULL) { |
1513 |
continue;
|
1514 |
} |
1515 |
se->set_params(blk_enable, shared, se->opaque); |
1516 |
} |
1517 |
|
1518 |
qemu_put_be32(f, QEMU_VM_FILE_MAGIC); |
1519 |
qemu_put_be32(f, QEMU_VM_FILE_VERSION); |
1520 |
|
1521 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1522 |
int len;
|
1523 |
|
1524 |
if (se->save_live_state == NULL) |
1525 |
continue;
|
1526 |
|
1527 |
/* Section type */
|
1528 |
qemu_put_byte(f, QEMU_VM_SECTION_START); |
1529 |
qemu_put_be32(f, se->section_id); |
1530 |
|
1531 |
/* ID string */
|
1532 |
len = strlen(se->idstr); |
1533 |
qemu_put_byte(f, len); |
1534 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1535 |
|
1536 |
qemu_put_be32(f, se->instance_id); |
1537 |
qemu_put_be32(f, se->version_id); |
1538 |
|
1539 |
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque); |
1540 |
if (ret < 0) { |
1541 |
qemu_savevm_state_cancel(mon, f); |
1542 |
return ret;
|
1543 |
} |
1544 |
} |
1545 |
ret = qemu_file_get_error(f); |
1546 |
if (ret != 0) { |
1547 |
qemu_savevm_state_cancel(mon, f); |
1548 |
} |
1549 |
|
1550 |
return ret;
|
1551 |
|
1552 |
} |
1553 |
|
1554 |
/*
|
1555 |
* this function has three return values:
|
1556 |
* negative: there was one error, and we have -errno.
|
1557 |
* 0 : We haven't finished, caller have to go again
|
1558 |
* 1 : We have finished, we can go to complete phase
|
1559 |
*/
|
1560 |
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
|
1561 |
{ |
1562 |
SaveStateEntry *se; |
1563 |
int ret = 1; |
1564 |
|
1565 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1566 |
if (se->save_live_state == NULL) |
1567 |
continue;
|
1568 |
|
1569 |
/* Section type */
|
1570 |
qemu_put_byte(f, QEMU_VM_SECTION_PART); |
1571 |
qemu_put_be32(f, se->section_id); |
1572 |
|
1573 |
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque); |
1574 |
if (ret <= 0) { |
1575 |
/* Do not proceed to the next vmstate before this one reported
|
1576 |
completion of the current stage. This serializes the migration
|
1577 |
and reduces the probability that a faster changing state is
|
1578 |
synchronized over and over again. */
|
1579 |
break;
|
1580 |
} |
1581 |
} |
1582 |
if (ret != 0) { |
1583 |
return ret;
|
1584 |
} |
1585 |
ret = qemu_file_get_error(f); |
1586 |
if (ret != 0) { |
1587 |
qemu_savevm_state_cancel(mon, f); |
1588 |
} |
1589 |
return ret;
|
1590 |
} |
1591 |
|
1592 |
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
|
1593 |
{ |
1594 |
SaveStateEntry *se; |
1595 |
int ret;
|
1596 |
|
1597 |
cpu_synchronize_all_states(); |
1598 |
|
1599 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1600 |
if (se->save_live_state == NULL) |
1601 |
continue;
|
1602 |
|
1603 |
/* Section type */
|
1604 |
qemu_put_byte(f, QEMU_VM_SECTION_END); |
1605 |
qemu_put_be32(f, se->section_id); |
1606 |
|
1607 |
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque); |
1608 |
if (ret < 0) { |
1609 |
return ret;
|
1610 |
} |
1611 |
} |
1612 |
|
1613 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1614 |
int len;
|
1615 |
|
1616 |
if (se->save_state == NULL && se->vmsd == NULL) |
1617 |
continue;
|
1618 |
|
1619 |
/* Section type */
|
1620 |
qemu_put_byte(f, QEMU_VM_SECTION_FULL); |
1621 |
qemu_put_be32(f, se->section_id); |
1622 |
|
1623 |
/* ID string */
|
1624 |
len = strlen(se->idstr); |
1625 |
qemu_put_byte(f, len); |
1626 |
qemu_put_buffer(f, (uint8_t *)se->idstr, len); |
1627 |
|
1628 |
qemu_put_be32(f, se->instance_id); |
1629 |
qemu_put_be32(f, se->version_id); |
1630 |
|
1631 |
vmstate_save(f, se); |
1632 |
} |
1633 |
|
1634 |
qemu_put_byte(f, QEMU_VM_EOF); |
1635 |
|
1636 |
return qemu_file_get_error(f);
|
1637 |
} |
1638 |
|
1639 |
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
|
1640 |
{ |
1641 |
SaveStateEntry *se; |
1642 |
|
1643 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1644 |
if (se->save_live_state) {
|
1645 |
se->save_live_state(mon, f, -1, se->opaque);
|
1646 |
} |
1647 |
} |
1648 |
} |
1649 |
|
1650 |
static int qemu_savevm_state(Monitor *mon, QEMUFile *f) |
1651 |
{ |
1652 |
int ret;
|
1653 |
|
1654 |
if (qemu_savevm_state_blocked(mon)) {
|
1655 |
ret = -EINVAL; |
1656 |
goto out;
|
1657 |
} |
1658 |
|
1659 |
ret = qemu_savevm_state_begin(mon, f, 0, 0); |
1660 |
if (ret < 0) |
1661 |
goto out;
|
1662 |
|
1663 |
do {
|
1664 |
ret = qemu_savevm_state_iterate(mon, f); |
1665 |
if (ret < 0) |
1666 |
goto out;
|
1667 |
} while (ret == 0); |
1668 |
|
1669 |
ret = qemu_savevm_state_complete(mon, f); |
1670 |
|
1671 |
out:
|
1672 |
if (ret == 0) { |
1673 |
ret = qemu_file_get_error(f); |
1674 |
} |
1675 |
|
1676 |
return ret;
|
1677 |
} |
1678 |
|
1679 |
static SaveStateEntry *find_se(const char *idstr, int instance_id) |
1680 |
{ |
1681 |
SaveStateEntry *se; |
1682 |
|
1683 |
QTAILQ_FOREACH(se, &savevm_handlers, entry) { |
1684 |
if (!strcmp(se->idstr, idstr) &&
|
1685 |
(instance_id == se->instance_id || |
1686 |
instance_id == se->alias_id)) |
1687 |
return se;
|
1688 |
/* Migrating from an older version? */
|
1689 |
if (strstr(se->idstr, idstr) && se->compat) {
|
1690 |
if (!strcmp(se->compat->idstr, idstr) &&
|
1691 |
(instance_id == se->compat->instance_id || |
1692 |
instance_id == se->alias_id)) |
1693 |
return se;
|
1694 |
} |
1695 |
} |
1696 |
return NULL; |
1697 |
} |
1698 |
|
1699 |
static const VMStateDescription *vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
1700 |
{ |
1701 |
while(sub && sub->needed) {
|
1702 |
if (strcmp(idstr, sub->vmsd->name) == 0) { |
1703 |
return sub->vmsd;
|
1704 |
} |
1705 |
sub++; |
1706 |
} |
1707 |
return NULL; |
1708 |
} |
1709 |
|
1710 |
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
1711 |
void *opaque)
|
1712 |
{ |
1713 |
while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
1714 |
char idstr[256]; |
1715 |
int ret;
|
1716 |
uint8_t version_id, len, size; |
1717 |
const VMStateDescription *sub_vmsd;
|
1718 |
|
1719 |
len = qemu_peek_byte(f, 1);
|
1720 |
if (len < strlen(vmsd->name) + 1) { |
1721 |
/* subsection name has be be "section_name/a" */
|
1722 |
return 0; |
1723 |
} |
1724 |
size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
|
1725 |
if (size != len) {
|
1726 |
return 0; |
1727 |
} |
1728 |
idstr[size] = 0;
|
1729 |
|
1730 |
if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
1731 |
/* it don't have a valid subsection name */
|
1732 |
return 0; |
1733 |
} |
1734 |
sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
1735 |
if (sub_vmsd == NULL) { |
1736 |
return -ENOENT;
|
1737 |
} |
1738 |
qemu_file_skip(f, 1); /* subsection */ |
1739 |
qemu_file_skip(f, 1); /* len */ |
1740 |
qemu_file_skip(f, len); /* idstr */
|
1741 |
version_id = qemu_get_be32(f); |
1742 |
|
1743 |
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
1744 |
if (ret) {
|
1745 |
return ret;
|
1746 |
} |
1747 |
} |
1748 |
return 0; |
1749 |
} |
1750 |
|
1751 |
static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
1752 |
void *opaque)
|
1753 |
{ |
1754 |
const VMStateSubsection *sub = vmsd->subsections;
|
1755 |
|
1756 |
while (sub && sub->needed) {
|
1757 |
if (sub->needed(opaque)) {
|
1758 |
const VMStateDescription *vmsd = sub->vmsd;
|
1759 |
uint8_t len; |
1760 |
|
1761 |
qemu_put_byte(f, QEMU_VM_SUBSECTION); |
1762 |
len = strlen(vmsd->name); |
1763 |
qemu_put_byte(f, len); |
1764 |
qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
1765 |
qemu_put_be32(f, vmsd->version_id); |
1766 |
vmstate_save_state(f, vmsd, opaque); |
1767 |
} |
1768 |
sub++; |
1769 |
} |
1770 |
} |
1771 |
|
1772 |
typedef struct LoadStateEntry { |
1773 |
QLIST_ENTRY(LoadStateEntry) entry; |
1774 |
SaveStateEntry *se; |
1775 |
int section_id;
|
1776 |
int version_id;
|
1777 |
} LoadStateEntry; |
1778 |
|
1779 |
int qemu_loadvm_state(QEMUFile *f)
|
1780 |
{ |
1781 |
QLIST_HEAD(, LoadStateEntry) loadvm_handlers = |
1782 |
QLIST_HEAD_INITIALIZER(loadvm_handlers); |
1783 |
LoadStateEntry *le, *new_le; |
1784 |
uint8_t section_type; |
1785 |
unsigned int v; |
1786 |
int ret;
|
1787 |
|
1788 |
if (qemu_savevm_state_blocked(default_mon)) {
|
1789 |
return -EINVAL;
|
1790 |
} |
1791 |
|
1792 |
v = qemu_get_be32(f); |
1793 |
if (v != QEMU_VM_FILE_MAGIC)
|
1794 |
return -EINVAL;
|
1795 |
|
1796 |
v = qemu_get_be32(f); |
1797 |
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
1798 |
fprintf(stderr, "SaveVM v2 format is obsolete and don't work anymore\n");
|
1799 |
return -ENOTSUP;
|
1800 |
} |
1801 |
if (v != QEMU_VM_FILE_VERSION)
|
1802 |
return -ENOTSUP;
|
1803 |
|
1804 |
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
1805 |
uint32_t instance_id, version_id, section_id; |
1806 |
SaveStateEntry *se; |
1807 |
char idstr[257]; |
1808 |
int len;
|
1809 |
|
1810 |
switch (section_type) {
|
1811 |
case QEMU_VM_SECTION_START:
|
1812 |
case QEMU_VM_SECTION_FULL:
|
1813 |
/* Read section start */
|
1814 |
section_id = qemu_get_be32(f); |
1815 |
len = qemu_get_byte(f); |
1816 |
qemu_get_buffer(f, (uint8_t *)idstr, len); |
1817 |
idstr[len] = 0;
|
1818 |
instance_id = qemu_get_be32(f); |
1819 |
version_id = qemu_get_be32(f); |
1820 |
|
1821 |
/* Find savevm section */
|
1822 |
se = find_se(idstr, instance_id); |
1823 |
if (se == NULL) { |
1824 |
fprintf(stderr, "Unknown savevm section or instance '%s' %d\n", idstr, instance_id);
|
1825 |
ret = -EINVAL; |
1826 |
goto out;
|
1827 |
} |
1828 |
|
1829 |
/* Validate version */
|
1830 |
if (version_id > se->version_id) {
|
1831 |
fprintf(stderr, "savevm: unsupported version %d for '%s' v%d\n",
|
1832 |
version_id, idstr, se->version_id); |
1833 |
ret = -EINVAL; |
1834 |
goto out;
|
1835 |
} |
1836 |
|
1837 |
/* Add entry */
|
1838 |
le = g_malloc0(sizeof(*le));
|
1839 |
|
1840 |
le->se = se; |
1841 |
le->section_id = section_id; |
1842 |
le->version_id = version_id; |
1843 |
QLIST_INSERT_HEAD(&loadvm_handlers, le, entry); |
1844 |
|
1845 |
ret = vmstate_load(f, le->se, le->version_id); |
1846 |
if (ret < 0) { |
1847 |
fprintf(stderr, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
|
1848 |
instance_id, idstr); |
1849 |
goto out;
|
1850 |
} |
1851 |
break;
|
1852 |
case QEMU_VM_SECTION_PART:
|
1853 |
case QEMU_VM_SECTION_END:
|
1854 |
section_id = qemu_get_be32(f); |
1855 |
|
1856 |
QLIST_FOREACH(le, &loadvm_handlers, entry) { |
1857 |
if (le->section_id == section_id) {
|
1858 |
break;
|
1859 |
} |
1860 |
} |
1861 |
if (le == NULL) { |
1862 |
fprintf(stderr, "Unknown savevm section %d\n", section_id);
|
1863 |
ret = -EINVAL; |
1864 |
goto out;
|
1865 |
} |
1866 |
|
1867 |
ret = vmstate_load(f, le->se, le->version_id); |
1868 |
if (ret < 0) { |
1869 |
fprintf(stderr, "qemu: warning: error while loading state section id %d\n",
|
1870 |
section_id); |
1871 |
goto out;
|
1872 |
} |
1873 |
break;
|
1874 |
default:
|
1875 |
fprintf(stderr, "Unknown savevm section type %d\n", section_type);
|
1876 |
ret = -EINVAL; |
1877 |
goto out;
|
1878 |
} |
1879 |
} |
1880 |
|
1881 |
cpu_synchronize_all_post_init(); |
1882 |
|
1883 |
ret = 0;
|
1884 |
|
1885 |
out:
|
1886 |
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) { |
1887 |
QLIST_REMOVE(le, entry); |
1888 |
g_free(le); |
1889 |
} |
1890 |
|
1891 |
if (ret == 0) { |
1892 |
ret = qemu_file_get_error(f); |
1893 |
} |
1894 |
|
1895 |
return ret;
|
1896 |
} |
1897 |
|
1898 |
static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
1899 |
const char *name) |
1900 |
{ |
1901 |
QEMUSnapshotInfo *sn_tab, *sn; |
1902 |
int nb_sns, i, ret;
|
1903 |
|
1904 |
ret = -ENOENT; |
1905 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
1906 |
if (nb_sns < 0) |
1907 |
return ret;
|
1908 |
for(i = 0; i < nb_sns; i++) { |
1909 |
sn = &sn_tab[i]; |
1910 |
if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
|
1911 |
*sn_info = *sn; |
1912 |
ret = 0;
|
1913 |
break;
|
1914 |
} |
1915 |
} |
1916 |
g_free(sn_tab); |
1917 |
return ret;
|
1918 |
} |
1919 |
|
1920 |
/*
|
1921 |
* Deletes snapshots of a given name in all opened images.
|
1922 |
*/
|
1923 |
static int del_existing_snapshots(Monitor *mon, const char *name) |
1924 |
{ |
1925 |
BlockDriverState *bs; |
1926 |
QEMUSnapshotInfo sn1, *snapshot = &sn1; |
1927 |
int ret;
|
1928 |
|
1929 |
bs = NULL;
|
1930 |
while ((bs = bdrv_next(bs))) {
|
1931 |
if (bdrv_can_snapshot(bs) &&
|
1932 |
bdrv_snapshot_find(bs, snapshot, name) >= 0)
|
1933 |
{ |
1934 |
ret = bdrv_snapshot_delete(bs, name); |
1935 |
if (ret < 0) { |
1936 |
monitor_printf(mon, |
1937 |
"Error while deleting snapshot on '%s'\n",
|
1938 |
bdrv_get_device_name(bs)); |
1939 |
return -1; |
1940 |
} |
1941 |
} |
1942 |
} |
1943 |
|
1944 |
return 0; |
1945 |
} |
1946 |
|
1947 |
void do_savevm(Monitor *mon, const QDict *qdict) |
1948 |
{ |
1949 |
BlockDriverState *bs, *bs1; |
1950 |
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1; |
1951 |
int ret;
|
1952 |
QEMUFile *f; |
1953 |
int saved_vm_running;
|
1954 |
uint32_t vm_state_size; |
1955 |
#ifdef _WIN32
|
1956 |
struct _timeb tb;
|
1957 |
struct tm *ptm;
|
1958 |
#else
|
1959 |
struct timeval tv;
|
1960 |
struct tm tm;
|
1961 |
#endif
|
1962 |
const char *name = qdict_get_try_str(qdict, "name"); |
1963 |
|
1964 |
/* Verify if there is a device that doesn't support snapshots and is writable */
|
1965 |
bs = NULL;
|
1966 |
while ((bs = bdrv_next(bs))) {
|
1967 |
|
1968 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
1969 |
continue;
|
1970 |
} |
1971 |
|
1972 |
if (!bdrv_can_snapshot(bs)) {
|
1973 |
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
1974 |
bdrv_get_device_name(bs)); |
1975 |
return;
|
1976 |
} |
1977 |
} |
1978 |
|
1979 |
bs = bdrv_snapshots(); |
1980 |
if (!bs) {
|
1981 |
monitor_printf(mon, "No block device can accept snapshots\n");
|
1982 |
return;
|
1983 |
} |
1984 |
|
1985 |
saved_vm_running = runstate_is_running(); |
1986 |
vm_stop(RUN_STATE_SAVE_VM); |
1987 |
|
1988 |
memset(sn, 0, sizeof(*sn)); |
1989 |
|
1990 |
/* fill auxiliary fields */
|
1991 |
#ifdef _WIN32
|
1992 |
_ftime(&tb); |
1993 |
sn->date_sec = tb.time; |
1994 |
sn->date_nsec = tb.millitm * 1000000;
|
1995 |
#else
|
1996 |
gettimeofday(&tv, NULL);
|
1997 |
sn->date_sec = tv.tv_sec; |
1998 |
sn->date_nsec = tv.tv_usec * 1000;
|
1999 |
#endif
|
2000 |
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock); |
2001 |
|
2002 |
if (name) {
|
2003 |
ret = bdrv_snapshot_find(bs, old_sn, name); |
2004 |
if (ret >= 0) { |
2005 |
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
2006 |
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
2007 |
} else {
|
2008 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
2009 |
} |
2010 |
} else {
|
2011 |
#ifdef _WIN32
|
2012 |
ptm = localtime(&tb.time); |
2013 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm); |
2014 |
#else
|
2015 |
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
2016 |
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
2017 |
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm); |
2018 |
#endif
|
2019 |
} |
2020 |
|
2021 |
/* Delete old snapshots of the same name */
|
2022 |
if (name && del_existing_snapshots(mon, name) < 0) { |
2023 |
goto the_end;
|
2024 |
} |
2025 |
|
2026 |
/* save the VM state */
|
2027 |
f = qemu_fopen_bdrv(bs, 1);
|
2028 |
if (!f) {
|
2029 |
monitor_printf(mon, "Could not open VM state file\n");
|
2030 |
goto the_end;
|
2031 |
} |
2032 |
ret = qemu_savevm_state(mon, f); |
2033 |
vm_state_size = qemu_ftell(f); |
2034 |
qemu_fclose(f); |
2035 |
if (ret < 0) { |
2036 |
monitor_printf(mon, "Error %d while writing VM\n", ret);
|
2037 |
goto the_end;
|
2038 |
} |
2039 |
|
2040 |
/* create the snapshots */
|
2041 |
|
2042 |
bs1 = NULL;
|
2043 |
while ((bs1 = bdrv_next(bs1))) {
|
2044 |
if (bdrv_can_snapshot(bs1)) {
|
2045 |
/* Write VM state size only to the image that contains the state */
|
2046 |
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
|
2047 |
ret = bdrv_snapshot_create(bs1, sn); |
2048 |
if (ret < 0) { |
2049 |
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
2050 |
bdrv_get_device_name(bs1)); |
2051 |
} |
2052 |
} |
2053 |
} |
2054 |
|
2055 |
the_end:
|
2056 |
if (saved_vm_running)
|
2057 |
vm_start(); |
2058 |
} |
2059 |
|
2060 |
int load_vmstate(const char *name) |
2061 |
{ |
2062 |
BlockDriverState *bs, *bs_vm_state; |
2063 |
QEMUSnapshotInfo sn; |
2064 |
QEMUFile *f; |
2065 |
int ret;
|
2066 |
|
2067 |
bs_vm_state = bdrv_snapshots(); |
2068 |
if (!bs_vm_state) {
|
2069 |
error_report("No block device supports snapshots");
|
2070 |
return -ENOTSUP;
|
2071 |
} |
2072 |
|
2073 |
/* Don't even try to load empty VM states */
|
2074 |
ret = bdrv_snapshot_find(bs_vm_state, &sn, name); |
2075 |
if (ret < 0) { |
2076 |
return ret;
|
2077 |
} else if (sn.vm_state_size == 0) { |
2078 |
error_report("This is a disk-only snapshot. Revert to it offline "
|
2079 |
"using qemu-img.");
|
2080 |
return -EINVAL;
|
2081 |
} |
2082 |
|
2083 |
/* Verify if there is any device that doesn't support snapshots and is
|
2084 |
writable and check if the requested snapshot is available too. */
|
2085 |
bs = NULL;
|
2086 |
while ((bs = bdrv_next(bs))) {
|
2087 |
|
2088 |
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
2089 |
continue;
|
2090 |
} |
2091 |
|
2092 |
if (!bdrv_can_snapshot(bs)) {
|
2093 |
error_report("Device '%s' is writable but does not support snapshots.",
|
2094 |
bdrv_get_device_name(bs)); |
2095 |
return -ENOTSUP;
|
2096 |
} |
2097 |
|
2098 |
ret = bdrv_snapshot_find(bs, &sn, name); |
2099 |
if (ret < 0) { |
2100 |
error_report("Device '%s' does not have the requested snapshot '%s'",
|
2101 |
bdrv_get_device_name(bs), name); |
2102 |
return ret;
|
2103 |
} |
2104 |
} |
2105 |
|
2106 |
/* Flush all IO requests so they don't interfere with the new state. */
|
2107 |
qemu_aio_flush(); |
2108 |
|
2109 |
bs = NULL;
|
2110 |
while ((bs = bdrv_next(bs))) {
|
2111 |
if (bdrv_can_snapshot(bs)) {
|
2112 |
ret = bdrv_snapshot_goto(bs, name); |
2113 |
if (ret < 0) { |
2114 |
error_report("Error %d while activating snapshot '%s' on '%s'",
|
2115 |
ret, name, bdrv_get_device_name(bs)); |
2116 |
return ret;
|
2117 |
} |
2118 |
} |
2119 |
} |
2120 |
|
2121 |
/* restore the VM state */
|
2122 |
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
2123 |
if (!f) {
|
2124 |
error_report("Could not open VM state file");
|
2125 |
return -EINVAL;
|
2126 |
} |
2127 |
|
2128 |
qemu_system_reset(VMRESET_SILENT); |
2129 |
ret = qemu_loadvm_state(f); |
2130 |
|
2131 |
qemu_fclose(f); |
2132 |
if (ret < 0) { |
2133 |
error_report("Error %d while loading VM state", ret);
|
2134 |
return ret;
|
2135 |
} |
2136 |
|
2137 |
return 0; |
2138 |
} |
2139 |
|
2140 |
void do_delvm(Monitor *mon, const QDict *qdict) |
2141 |
{ |
2142 |
BlockDriverState *bs, *bs1; |
2143 |
int ret;
|
2144 |
const char *name = qdict_get_str(qdict, "name"); |
2145 |
|
2146 |
bs = bdrv_snapshots(); |
2147 |
if (!bs) {
|
2148 |
monitor_printf(mon, "No block device supports snapshots\n");
|
2149 |
return;
|
2150 |
} |
2151 |
|
2152 |
bs1 = NULL;
|
2153 |
while ((bs1 = bdrv_next(bs1))) {
|
2154 |
if (bdrv_can_snapshot(bs1)) {
|
2155 |
ret = bdrv_snapshot_delete(bs1, name); |
2156 |
if (ret < 0) { |
2157 |
if (ret == -ENOTSUP)
|
2158 |
monitor_printf(mon, |
2159 |
"Snapshots not supported on device '%s'\n",
|
2160 |
bdrv_get_device_name(bs1)); |
2161 |
else
|
2162 |
monitor_printf(mon, "Error %d while deleting snapshot on "
|
2163 |
"'%s'\n", ret, bdrv_get_device_name(bs1));
|
2164 |
} |
2165 |
} |
2166 |
} |
2167 |
} |
2168 |
|
2169 |
void do_info_snapshots(Monitor *mon)
|
2170 |
{ |
2171 |
BlockDriverState *bs, *bs1; |
2172 |
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; |
2173 |
int nb_sns, i, ret, available;
|
2174 |
int total;
|
2175 |
int *available_snapshots;
|
2176 |
char buf[256]; |
2177 |
|
2178 |
bs = bdrv_snapshots(); |
2179 |
if (!bs) {
|
2180 |
monitor_printf(mon, "No available block device supports snapshots\n");
|
2181 |
return;
|
2182 |
} |
2183 |
|
2184 |
nb_sns = bdrv_snapshot_list(bs, &sn_tab); |
2185 |
if (nb_sns < 0) { |
2186 |
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
2187 |
return;
|
2188 |
} |
2189 |
|
2190 |
if (nb_sns == 0) { |
2191 |
monitor_printf(mon, "There is no snapshot available.\n");
|
2192 |
return;
|
2193 |
} |
2194 |
|
2195 |
available_snapshots = g_malloc0(sizeof(int) * nb_sns); |
2196 |
total = 0;
|
2197 |
for (i = 0; i < nb_sns; i++) { |
2198 |
sn = &sn_tab[i]; |
2199 |
available = 1;
|
2200 |
bs1 = NULL;
|
2201 |
|
2202 |
while ((bs1 = bdrv_next(bs1))) {
|
2203 |
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
2204 |
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); |
2205 |
if (ret < 0) { |
2206 |
available = 0;
|
2207 |
break;
|
2208 |
} |
2209 |
} |
2210 |
} |
2211 |
|
2212 |
if (available) {
|
2213 |
available_snapshots[total] = i; |
2214 |
total++; |
2215 |
} |
2216 |
} |
2217 |
|
2218 |
if (total > 0) { |
2219 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); |
2220 |
for (i = 0; i < total; i++) { |
2221 |
sn = &sn_tab[available_snapshots[i]]; |
2222 |
monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); |
2223 |
} |
2224 |
} else {
|
2225 |
monitor_printf(mon, "There is no suitable snapshot available\n");
|
2226 |
} |
2227 |
|
2228 |
g_free(sn_tab); |
2229 |
g_free(available_snapshots); |
2230 |
|
2231 |
} |