| Message ID | cover.1593509090.git.petrm@mellanox.com |
|---|---|
| Headers | show |
| Series | Support qevents | expand |
On 6/30/20 4:14 AM, Petr Machata wrote: > To allow configuring user-defined actions as a result of inner workings of > a qdisc, a concept of qevents was recently introduced to the kernel. > Qevents are attach points for TC blocks, where filters can be put that are > executed as the packet hits well-defined points in the qdisc algorithms. > The attached blocks can be shared, in a manner similar to clsact ingress > and egress blocks, arbitrary classifiers with arbitrary actions can be put > on them, etc. > > For example: > > # tc qdisc add dev eth0 root handle 1: \ > red limit 500K avpkt 1K qevent early_drop block 10 > # tc filter add block 10 \ > matchall action mirred egress mirror dev eth1 > > This patch set introduces the corresponding iproute2 support. Patch #1 adds > the new netlink attribute enumerators. Patch #2 adds a set of helpers to > implement qevents, and #3 adds a generic documentation to tc.8. Patch #4 > then adds two new qevents to the RED qdisc: mark and early_drop. > applied to iproute2-next. Thanks
To allow configuring user-defined actions as a result of inner workings of a qdisc, a concept of qevents was recently introduced to the kernel. Qevents are attach points for TC blocks, where filters can be put that are executed as the packet hits well-defined points in the qdisc algorithms. The attached blocks can be shared, in a manner similar to clsact ingress and egress blocks, arbitrary classifiers with arbitrary actions can be put on them, etc. For example: # tc qdisc add dev eth0 root handle 1: \ red limit 500K avpkt 1K qevent early_drop block 10 # tc filter add block 10 \ matchall action mirred egress mirror dev eth1 This patch set introduces the corresponding iproute2 support. Patch #1 adds the new netlink attribute enumerators. Patch #2 adds a set of helpers to implement qevents, and #3 adds a generic documentation to tc.8. Patch #4 then adds two new qevents to the RED qdisc: mark and early_drop. Changes from v1 to v2: - Patch #3: - s/early/early_drop/ in the example. Changes from RFC to v1: - Rename "tail" qevent to "tail_drop". - Adapt to the new 100-column standard. - Add a selftest Petr Machata (4): uapi: pkt_sched: Add two new RED attributes tc: Add helpers to support qevent handling man: tc: Describe qevents tc: q_red: Add support for qevents "mark" and "early_drop" include/uapi/linux/pkt_sched.h | 2 + man/man8/tc-red.8 | 18 ++- man/man8/tc.8 | 19 ++++ tc/Makefile | 1 + tc/q_red.c | 30 ++++- tc/tc_qevent.c | 202 +++++++++++++++++++++++++++++++++ tc/tc_qevent.h | 49 ++++++++ 7 files changed, 317 insertions(+), 4 deletions(-) create mode 100644 tc/tc_qevent.c create mode 100644 tc/tc_qevent.h