From: Alexei Starovoitov Date: Mon, 1 Nov 2021 21:10:00 +0000 (-0700) Subject: Merge branch 'introduce dummy BPF STRUCT_OPS' X-Git-Tag: v6.6.17~8953^2~2^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f27a6fad14e24dfc755dfcdc08d9a3f514ddb593;p=platform%2Fkernel%2Flinux-rpi.git Merge branch 'introduce dummy BPF STRUCT_OPS' Hou Tao says: ==================== Hi, Currently the test of BPF STRUCT_OPS depends on the specific bpf implementation (e.g, tcp_congestion_ops), but it can not cover all basic functionalities (e.g, return value handling), so introduce a dummy BPF STRUCT_OPS for test purpose. Instead of loading a userspace-implemeted bpf_dummy_ops map into kernel and calling the specific function by writing to sysfs provided by bpf_testmode.ko, only loading bpf_dummy_ops related prog into kernel and calling these prog by bpf_prog_test_run(). The latter is more flexible and has no dependency on extra kernel module. Now the return value handling is supported by test_1(...) ops, and passing multiple arguments is supported by test_2(...) ops. If more is needed, test_x(...) ops can be added afterwards. Comments are always welcome. Regards, Hou Change Log: v4: * add Acked-by tags in patch 1~4 * patch 2: remove unncessary comments and update commit message accordingly * patch 4: remove unnecessary nr checking in dummy_ops_init_args() v3: https://www.spinics.net/lists/bpf/msg48303.html * rebase on bpf-next * address comments for Martin, mainly include: merge patch 3 & patch 4 in v2, fix names of btf ctx access check helpers, handle CONFIG_NET, fix leak in dummy_ops_init_args(), and simplify bpf_dummy_init() * patch 4: use a loop to check args in test_dummy_multiple_args() v2: https://www.spinics.net/lists/bpf/msg47948.html * rebase on bpf-next * add test_2(...) ops to test the passing of multiple arguments * a new patch (patch #2) is added to factor out ctx access helpers * address comments from Martin & Andrii v1: https://www.spinics.net/lists/bpf/msg46787.html RFC: https://www.spinics.net/lists/bpf/msg46117.html ==================== Signed-off-by: Alexei Starovoitov --- f27a6fad14e24dfc755dfcdc08d9a3f514ddb593