linux/samples/bpf, branch v6.0

samples: bpf: Fix cross-compiling error by using bootstrap bpftool

2022-07-15T19:01:30Z

Currently, when cross compiling bpf samples, the host side cannot use arch-specific bpftool to generate vmlinux.h or skeleton. Since samples/bpf use bpftool for vmlinux.h, skeleton, and static linking only, we can use lightweight bootstrap version of bpftool to handle these, and it's always host-native. Suggested-by: Andrii Nakryiko Signed-off-by: Pu Lehui Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220714024612.944071-2-pulehui@huawei.com

samples: bpf: Replace sizeof(arr)/sizeof(arr[0]) with ARRAY_SIZE

2022-07-14T04:43:52Z

The ARRAY_SIZE macro is more compact and more formal in linux source. Signed-off-by: Linkui Xiao Signed-off-by: Andrii Nakryiko Acked-by: Jiri Olsa Link: https://lore.kernel.org/bpf/20220712072302.13761-1-xiaolinkui@kylinos.cn

samples/bpf: Fix xdp_redirect_map egress devmap prog

2022-07-12T04:14:35Z

LLVM compiler optimized out the memcpy in xdp_redirect_map_egress, which caused the Ethernet source MAC-addr to always be zero when enabling the devmap egress prog via cmdline --load-egress. Issue observed with LLVM version 14.0.0 - Shipped with Fedora 36 on target: x86_64-redhat-linux-gnu. In verbose mode print the source MAC-addr in case xdp_devmap_attached mode is used. Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/165754826292.575614.5636444052787717159.stgit@firesoul

bpf, samples: Remove AF_XDP samples

2022-07-05T09:58:44Z

Remove the AF_XDP samples from samples/bpf/ as they are dependent on the AF_XDP support in libbpf. This support has now been removed in the 1.0 release, so these samples cannot be compiled anymore. Please start to use libxdp instead. It is backwards compatible with the AF_XDP support that was offered in libbpf. New samples can be found in the various xdp-project repositories connected to libxdp and by googling. Signed-off-by: Magnus Karlsson Signed-off-by: Daniel Borkmann Acked-by: Toke Høiland-Jørgensen Acked-by: Maciej Fijalkowski Acked-by: Jesper Dangaard Brouer Link: https://lore.kernel.org/bpf/20220630093717.8664-1-magnus.karlsson@gmail.com

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

2022-06-22T01:55:53Z

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

2022-06-16T00:26:20Z

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

2022-06-02T23:26:54Z

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

2022-05-10T00:40:43Z

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

2022-04-28T02:07:42Z

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

2022-04-20T21:58:29Z

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