7 Commits (cf7dae3026b1342b1981c02ab9218946f1bb48ce)

Author	SHA1	Message	Date
Claude	cf7dae3026	Add tests for wgengine, kube, doctor, and gokrazy packages ... - wgengine/capture: Packet capture tests - wgengine/netlog: Network logging tests - kube/kubeclient: Kubernetes client tests - doctor/ethtool: Ethtool diagnostics tests - doctor/routetable: Route table inspection tests - gokrazy: Gokrazy platform detection tests Coverage now spans wgengine network components and diagnostic tools.	2 weeks ago
Joe Tsai	2e5d08ec4f	net/connstats: invert network logging data flow (#6272) ... Previously, tstun.Wrapper and magicsock.Conn managed their own statistics data structure and relied on an external call to Extract to extract (and reset) the statistics. This makes it difficult to ensure a maximum size on the statistics as the caller has no introspection into whether the number of unique connections is getting too large. Invert the control flow such that a *connstats.Statistics is registered with tstun.Wrapper and magicsock.Conn. Methods on non-nil *connstats.Statistics are called for every packet. This allows the implementation of connstats.Statistics (in the future) to better control when it needs to flush to ensure bounds on maximum sizes. The value registered into tstun.Wrapper and magicsock.Conn could be an interface, but that has two performance detriments: 1. Method calls on interface values are more expensive since they must go through a virtual method dispatch. 2. The implementation would need a sync.Mutex to protect the statistics value instead of using an atomic.Pointer. Given that methods on constats.Statistics are called for every packet, we want reduce the CPU cost on this hot path. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	a3602c28bd	wgengine/netlog: embed the StableNodeID of the authoring node (#6105) ... This allows network messages to be annotated with which node it came from. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	c21a3c4733	types/netlogtype: new package for network logging types (#6092) ... The netlog.Message type is useful to depend on from other packages, but doing so would transitively cause gvisor and other large packages to be linked in. Avoid this problem by moving all network logging types to a single package. We also update staticcheck to take in: 003d277bcf Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	a1a43ed266	wgengine/netlog: add support for magicsock statistics (#5913) ... This sets up Logger to handle statistics at the magicsock layer, where we can correlate traffic between a particular tailscale IP address and any number of physical endpoints used to contact the node that hosts that tailscale address. We also export Message and TupleCounts to better document the JSON format that is being sent to the logging infrastructure. This commit does NOT yet enable the actual logging of magicsock statistics. That will be a future commit. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	f9120eee57	wgengine: start network logger in Userspace.Reconfig (#5908) ... If the wgcfg.Config is specified with network logging arguments, then Userspace.Reconfig starts up an asynchronous network logger, which is shutdown either upon Userspace.Close or when Userspace.Reconfig is called again without network logging or route arguments. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Joe Tsai	1b4e4cc1e8	wgengine/netlog: new package for traffic flow logging (#5864) ... The Logger type managers a logtail.Logger for extracting statistics from a tstun.Wrapper. So long as Shutdown is called, it ensures that logtail and statistic gathering resources are properly cleared up. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago