Tue, Jan 24, 2017 at 09:32:05AM CET, [email protected] wrote: >On Mon, Jan 23, 2017 at 11:07:08AM +0100, Jiri Pirko wrote: >> From: Yotam Gigi <[email protected]> >> >> Add a general way for kernel modules to sample packets, without being tied >> to any specific subsystem. This netlink channel can be used by tc, >> iptables, etc. and allow to standardize packet sampling in the kernel. >> >> For every sampled packet, the psample module adds the following metadata >> fields: >> >> PSAMPLE_ATTR_IIFINDEX - the packets input ifindex, if applicable >> >> PSAMPLE_ATTR_OIFINDEX - the packet output ifindex, if applicable >> >> PSAMPLE_ATTR_ORIGSIZE - the packet's original size, in case it has been >> truncated during sampling >> >> PSAMPLE_ATTR_SAMPLE_GROUP - the packet's sample group, which is set by the >> user who initiated the sampling. This field allows the user to >> differentiate between several samplers working simultaneously and >> filter packets relevant to him >> >> PSAMPLE_ATTR_GROUP_SEQ - sequence counter of last sent packet. The >> sequence is kept for each group >> >> PSAMPLE_ATTR_SAMPLE_RATE - the sampling rate used for sampling the packets >> >> PSAMPLE_ATTR_DATA - the actual packet bits >> >> The sampled packets are sent to the PSAMPLE_NL_MCGRP_SAMPLE multicast >> group. In addition, add the GET_GROUPS netlink command which allows the >> user to see the current sample groups, their refcount and sequence number. >> This command currently supports only netlink dump mode. >> >> Signed-off-by: Yotam Gigi <[email protected]> >> Signed-off-by: Jiri Pirko <[email protected]> >> Reviewed-by: Jamal Hadi Salim <[email protected]> > >Hi Jiri, Hi Yotam, > >this looks good to me. > >Reviewed-by: Simon Horman <[email protected]> > >I do, however, have one question: what is your feeling about allowing >the per-action cooking which Jamal has proposed[1] to be emited as >metadata as another PSAMPLE_ATTR_* attribute? For one thing I think it >would allow for smooth integration with OvS user-space which makes use of a >cookie.
Yeah, cookie could be easily added.
