From 646c5478c04297485e3e045cd8969d2ae7642004 Mon Sep 17 00:00:00 2001 From: Pavel Dovgalyuk Date: Mon, 26 Sep 2016 11:08:21 +0300 Subject: record/replay: add network support This patch adds support of recording and replaying network packets in irount rr mode. Record and replay for network interactions is performed with the network filter. Each backend must have its own instance of the replay filter as follows: -netdev user,id=net1 -device rtl8139,netdev=net1 -object filter-replay,id=replay,netdev=net1 Replay network filter is used to record and replay network packets. While recording the virtual machine this filter puts all packets coming from the outer world into the log. In replay mode packets from the log are injected into the network device. All interactions with network backend in replay mode are disabled. v5 changes: - using iov_to_buf function instead of loop Signed-off-by: Pavel Dovgalyuk Signed-off-by: Jason Wang --- include/sysemu/replay.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include') diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h index f80d6d28e8..abb35ca8c9 100644 --- a/include/sysemu/replay.h +++ b/include/sysemu/replay.h @@ -39,6 +39,8 @@ enum ReplayCheckpoint { }; typedef enum ReplayCheckpoint ReplayCheckpoint; +typedef struct ReplayNetState ReplayNetState; + extern ReplayMode replay_mode; /* Replay process control functions */ @@ -137,4 +139,14 @@ void replay_char_read_all_save_error(int res); /*! Writes character read_all execution result into the replay log. */ void replay_char_read_all_save_buf(uint8_t *buf, int offset); +/* Network */ + +/*! Registers replay network filter attached to some backend. */ +ReplayNetState *replay_register_net(NetFilterState *nfs); +/*! Unregisters replay network filter. */ +void replay_unregister_net(ReplayNetState *rns); +/*! Called to write network packet to the replay log. */ +void replay_net_packet_event(ReplayNetState *rns, unsigned flags, + const struct iovec *iov, int iovcnt); + #endif -- cgit v1.2.3-55-g7522