kernel/git/next/linux-next.git/samples/bpf, branch akpm-base

samples/bpf: fixup some tools to be able to support xdp multibuffer

2022-06-22T01:55:53+00:00

This changes the section name for the bpf program embedded in these files to "xdp.frags" to allow the programs to be loaded on drivers that are using an MTU greater than PAGE_SIZE. Rather than directly accessing the buffers, the packet data is now accessed via xdp helper functions to provide an example for those who may need to write more complex programs. v2: remove new unnecessary variable Signed-off-by: Andy Gospodarek Acked-by: John Fastabend Acked-by: Lorenzo Bianconi Link: https://lore.kernel.org/r/20220621175402.35327-1-gospo@broadcom.com Signed-off-by: Alexei Starovoitov

samples/bpf: Check detach prog exist or not in xdp_fwd

2022-06-16T00:26:20+00:00

Before detach the prog, we should check detach prog exist or not. Signed-off-by: Zhengchao Shao Signed-off-by: Andrii Nakryiko Reviewed-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/bpf/20220606005425.261967-1-shaozhengchao@huawei.com

sample: bpf: xdp_router_ipv4: Allow the kernel to send arp requests

2022-06-02T23:26:54+00:00

Forward the packet to the kernel if the gw router mac address is missing in to trigger ARP discovery. Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper") Signed-off-by: Lorenzo Bianconi Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/60bde5496d108089080504f58199bcf1143ea938.1653471558.git.lorenzo@kernel.org

samples: bpf: Don't fail for a missing VMLINUX_BTF when VMLINUX_H is provided

2022-05-10T00:40:43+00:00

samples/bpf build currently always fails if it can't generate vmlinux.h from vmlinux, even when vmlinux.h is directly provided by VMLINUX_H variable, which makes VMLINUX_H pointless. Only fails when neither method works. Fixes: 384b6b3bbf0d ("samples: bpf: Add vmlinux.h generation support") Reported-by: CKI Project Reported-by: Veronika Kabatova Signed-off-by: Jerome Marchand Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220507161635.2219052-1-jmarchan@redhat.com

samples/bpf: Detach xdp prog when program exits unexpectedly in xdp_rxq_info_user

2022-04-28T02:07:42+00:00

When xdp_rxq_info_user program exits unexpectedly, it doesn't detach xdp prog of device, and other xdp prog can't be attached to the device. So call init_exit() to detach xdp prog when program exits unexpectedly. Signed-off-by: Zhengchao Shao Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220427062338.80173-1-shaozhengchao@huawei.com

samples/bpf: Reduce the sampling interval in xdp1_user

2022-04-20T21:58:29+00:00

If interval is 2, and sum - prev[key] = 1, the result = 0. This will mislead the tester that the port has no traffic right now. So reduce the sampling interval to 1. Signed-off-by: Zhengchao Shao Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220419114746.291613-1-shaozhengchao@huawei.com

samples/bpf: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK

2022-04-11T03:17:15+00:00

We have switched to memcg-based memory accouting and thus the rlimit is not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in libbpf for backward compatibility, so we can use it instead now. This patch also removes the useless header sys/resource.h from many files in samples/bpf. Signed-off-by: Yafang Shao Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220409125958.92629-2-laoar.shao@gmail.com

samples, bpf: Move routes monitor in xdp_router_ipv4 in a dedicated thread

2022-04-08T20:10:57+00:00

In order to not miss any netlink message from the kernel, move routes monitor to a dedicated thread. Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper") Signed-off-by: Lorenzo Bianconi Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/e364b817c69ded73be24b677ab47a157f7c21b64.1649167911.git.lorenzo@kernel.org

samples: bpf: Fix linking xdp_router_ipv4 after migration

2022-04-04T21:45:06+00:00

Users of the xdp_sample_user infra should be explicitly linked with the standard math library (`-lm`). Otherwise, the following happens: /usr/bin/ld: xdp_sample_user.c:(.text+0x59fc): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5a0d): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5adc): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x5b01): undefined reference to `ceil' /usr/bin/ld: xdp_sample_user.c:(.text+0x5c1e): undefined reference to `floor' /usr/bin/ld: xdp_sample_user.c:(.text+0x5c43): undefined reference to `ceil [...] That happened previously, so there's a block of linkage flags in the Makefile. xdp_router_ipv4 has been transferred to this infra quite recently, but hasn't been added to it. Fix. Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper") Signed-off-by: Alexander Lobakin Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220404115451.1116478-1-alexandr.lobakin@intel.com

sample: bpf: syscall_tp_user: Print result of verify_map

2022-04-04T21:43:57+00:00

At the end of the test, we already print out prog : map ids <...> <...> Value is the number read from kernel through bpf map, further print out verify map: val:<...> will help users to understand the program runs successfully. Signed-off-by: Song Chen Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/1648889828-12417-1-git-send-email-chensong_2000@189.cn