linux/samples/bpf, branch v5.11

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

2020-12-10T22:13:43Z

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"

2020-12-03T20:18:02Z

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

2020-12-03T18:37:59Z

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

2020-12-03T02:32:47Z

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

2020-11-30T23:09:26Z

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

2020-11-30T23:09:25Z

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

2020-11-30T23:09:25Z

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

2020-11-30T23:09:25Z

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

samples: bpf: Remove bpf_load loader completely

2020-11-27T03:33:36Z

Numerous refactoring that rewrites BPF programs written with bpf_load to use the libbpf loader was finally completed, resulting in BPF programs using bpf_load within the kernel being completely no longer present. This commit removes bpf_load, an outdated bpf loader that is difficult to keep up with the latest kernel BPF and causes confusion. Also, this commit removes the unused trace_helper and bpf_load from samples/bpf target objects from Makefile. Signed-off-by: Daniel T. Lee Signed-off-by: Andrii Nakryiko Acked-by: Jesper Dangaard Brouer Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20201124090310.24374-8-danieltimlee@gmail.com

samples: bpf: Fix lwt_len_hist reusing previous BPF map

2020-11-27T03:33:36Z

Currently, lwt_len_hist's map lwt_len_hist_map is uses pinning, and the map isn't cleared on test end. This leds to reuse of that map for each test, which prevents the results of the test from being accurate. This commit fixes the problem by removing of pinned map from bpffs. Also, this commit add the executable permission to shell script files. Fixes: f74599f7c5309 ("bpf: Add tests and samples for LWT-BPF") Signed-off-by: Daniel T. Lee Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20201124090310.24374-7-danieltimlee@gmail.com