diff options
| author | Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> | 2016-09-26 11:08:21 +0300 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2017-01-06 10:38:00 +0800 |
| commit | 646c5478c04297485e3e045cd8969d2ae7642004 (patch) | |
| tree | 866c3f19ca73a262c3f814e48bf7de0e92ba2d68 /docs/replay.txt | |
| parent | e92fbc753df4fab9ee524b5ea07a51bee8b6bae4 (diff) | |
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 <pavel.dovgaluk@ispras.ru>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'docs/replay.txt')
| -rw-r--r-- | docs/replay.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/replay.txt b/docs/replay.txt index 779c6c059e..347b2ff055 100644 --- a/docs/replay.txt +++ b/docs/replay.txt @@ -195,3 +195,17 @@ 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. + +Network devices +--------------- + +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. |