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63785678f3
This patch introduces block driver that implement recording and replaying of block devices' operations. All block completion operations are added to the queue. Queue is flushed at checkpoints and information about processed requests is recorded to the log. In replay phase the queue is matched with events read from the log. Therefore block devices requests are processed deterministically. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> [ kwolf: Rebased onto modified and already applied part of the series ] Signed-off-by: Kevin Wolf <kwolf@redhat.com>
70 lines
985 B
C
70 lines
985 B
C
#include "qemu/osdep.h"
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#include "sysemu/replay.h"
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#include "sysemu/sysemu.h"
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ReplayMode replay_mode;
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int64_t replay_save_clock(unsigned int kind, int64_t clock)
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{
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abort();
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return 0;
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}
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int64_t replay_read_clock(unsigned int kind)
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{
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abort();
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return 0;
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}
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bool replay_checkpoint(ReplayCheckpoint checkpoint)
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{
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return true;
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}
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bool replay_events_enabled(void)
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{
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return false;
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}
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void replay_finish(void)
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{
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}
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void replay_register_char_driver(CharDriverState *chr)
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{
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}
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void replay_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
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{
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abort();
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}
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void replay_char_write_event_save(int res, int offset)
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{
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abort();
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}
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void replay_char_write_event_load(int *res, int *offset)
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{
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abort();
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}
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int replay_char_read_all_load(uint8_t *buf)
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{
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abort();
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}
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void replay_char_read_all_save_error(int res)
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{
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abort();
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}
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void replay_char_read_all_save_buf(uint8_t *buf, int offset)
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{
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abort();
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}
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void replay_block_event(QEMUBH *bh, uint64_t id)
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{
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}
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