kernel/linux.git/samples/bpf, branch linux-5.11.y

samples/bpf: Fix broken tracex1 due to kprobe argument change

2021-05-19T08:29:34+00:00

[ Upstream commit 137733d08f4ab14a354dacaa9a8fc35217747605 ] >From commit c0bbbdc32feb ("__netif_receive_skb_core: pass skb by reference"), the first argument passed into __netif_receive_skb_core has changed to reference of a skb pointer. This commit fixes by using bpf_probe_read_kernel. Signed-off-by: Yaqi Chen Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20210416154803.37157-1-chendotjs@gmail.com Signed-off-by: Sasha Levin

samples, bpf: Add missing munmap in xdpsock

2021-03-17T16:11:21+00:00

commit 6bc6699881012b5bd5d49fa861a69a37fc01b49c upstream. We mmap the umem region, but we never munmap it. Add the missing call at the end of the cleanup. Fixes: 3945b37a975d ("samples/bpf: use hugepages in xdpsock app") Signed-off-by: Maciej Fijalkowski Signed-off-by: Daniel Borkmann Acked-by: Björn Töpel Link: https://lore.kernel.org/bpf/20210303185636.18070-3-maciej.fijalkowski@intel.com Signed-off-by: Greg Kroah-Hartman

samples/bpf: Fix possible hang in xdpsock with multiple threads

2020-12-10T22:13:43+00:00

Fix a possible hang in xdpsock that can occur when using multiple threads. In this case, one or more of the threads might get stuck in the while-loop in tx_only after the user has signaled the main thread to stop execution. In this case, no more Tx packets will be sent, so a thread might get stuck in the aforementioned while-loop. Fix this by introducing a test inside the while-loop to check if the benchmark has been terminated. If so, return from the function. Fixes: cd9e72b6f210 ("samples/bpf: xdpsock: Add option to specify batch size") Signed-off-by: Magnus Karlsson Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20201210163407.22066-1-magnus.karlsson@gmail.com

samples/bpf: Fix spelling mistake "recieving" -> "receiving"

2020-12-03T20:18:02+00:00

There is a spelling mistake in an error message. Fix it. Signed-off-by: Colin Ian King Signed-off-by: Andrii Nakryiko Acked-by: Björn Töpel Link: https://lore.kernel.org/bpf/20201203114452.1060017-1-colin.king@canonical.com

samples/bpf: Sample application for eBPF load and socket creation split

2020-12-03T18:37:59+00:00

Introduce a sample program to demonstrate the control and data plane split. For the control plane part a new program called xdpsock_ctrl_proc is introduced. For the data plane part, some code was added to xdpsock_user.c to act as the data plane entity. Application xdpsock_ctrl_proc works as control entity with sudo privileges (CAP_SYS_ADMIN and CAP_NET_ADMIN are sufficient) and the extended xdpsock as data plane entity with CAP_NET_RAW capability only. Usage example: sudo ./samples/bpf/xdpsock_ctrl_proc -i sudo ./samples/bpf/xdpsock -i -q -n -N -l -R Signed-off-by: Mariusz Dudek Signed-off-by: Alexei Starovoitov Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20201203090546.11976-3-mariuszx.dudek@intel.com

bpf: samples: Do not touch RLIMIT_MEMLOCK

2020-12-03T02:32:47+00:00

Since bpf is not using rlimit memlock for the memory accounting and control, do not change the limit in sample applications. Signed-off-by: Roman Gushchin Signed-off-by: Alexei Starovoitov Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20201201215900.3569844-35-guro@fb.com

samples/bpf: Add option to set the busy-poll budget

2020-11-30T23:09:26+00:00

Support for the SO_BUSY_POLL_BUDGET setsockopt, via the batching option ('b'). Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20201130185205.196029-11-bjorn.topel@gmail.com

samples/bpf: Add busy-poll support to xdpsock

2020-11-30T23:09:25+00:00

Add a new option to xdpsock, 'B', for busy-polling. This option will also set the batching size, 'b' option, to the busy-poll budget. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20201130185205.196029-10-bjorn.topel@gmail.com

samples/bpf: Use recvfrom() in xdpsock/l2fwd

2020-11-30T23:09:25+00:00

Start using recvfrom() the l2fwd scenario, instead of poll() which is more expensive and need additional knobs for busy-polling. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20201130185205.196029-9-bjorn.topel@gmail.com

samples/bpf: Use recvfrom() in xdpsock/rxdrop

2020-11-30T23:09:25+00:00

Start using recvfrom() the rxdrop scenario. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann Acked-by: Magnus Karlsson Link: https://lore.kernel.org/bpf/20201130185205.196029-8-bjorn.topel@gmail.com