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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/samples/bpf/net_shared.h

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C
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samples/bpf: split common macros to net_shared.h Currently, many programs under sample/bpf often include individual macros by directly including the header under "linux/" rather than using the "vmlinux.h" header. However, there are some problems with migrating to "vmlinux.h" because there is no definition for utility functions such as endianness conversion (ntohs/htons). Fortunately, the xdp_sample program already has a function that can be replaced to solve this problem. Therefore, this commit attempts to separate these functions into a file called net_shared.h to make them universally available. Additionally, this file includes network-related macros that are not defined in "vmlinux.h". (inspired by 'selftests' bpf_tracing_net.h) Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-8-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-01-15 10:16:10 +03:00
// SPDX-License-Identifier: GPL-2.0
#ifndef _NET_SHARED_H
#define _NET_SHARED_H
samples/bpf: replace BPF programs header with net_shared.h This commit applies "net_shared.h" to BPF programs to remove existing network related header dependencies. Also, this commit removes unnecessary headers before applying "vmlinux.h" to the BPF programs. Mostly, endianness conversion function has been applied to the source. In addition, several macros have been defined to fulfill the INET, TC-related constants. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-9-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-01-15 10:16:11 +03:00
#define AF_INET 2
#define AF_INET6 10
samples/bpf: split common macros to net_shared.h Currently, many programs under sample/bpf often include individual macros by directly including the header under "linux/" rather than using the "vmlinux.h" header. However, there are some problems with migrating to "vmlinux.h" because there is no definition for utility functions such as endianness conversion (ntohs/htons). Fortunately, the xdp_sample program already has a function that can be replaced to solve this problem. Therefore, this commit attempts to separate these functions into a file called net_shared.h to make them universally available. Additionally, this file includes network-related macros that are not defined in "vmlinux.h". (inspired by 'selftests' bpf_tracing_net.h) Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-8-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-01-15 10:16:10 +03:00
#define ETH_ALEN 6
#define ETH_P_802_3_MIN 0x0600
#define ETH_P_8021Q 0x8100
#define ETH_P_8021AD 0x88A8
#define ETH_P_IP 0x0800
#define ETH_P_IPV6 0x86DD
#define ETH_P_ARP 0x0806
#define IPPROTO_ICMPV6 58
samples/bpf: replace BPF programs header with net_shared.h This commit applies "net_shared.h" to BPF programs to remove existing network related header dependencies. Also, this commit removes unnecessary headers before applying "vmlinux.h" to the BPF programs. Mostly, endianness conversion function has been applied to the source. In addition, several macros have been defined to fulfill the INET, TC-related constants. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-9-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-01-15 10:16:11 +03:00
#define TC_ACT_OK 0
#define TC_ACT_SHOT 2
samples/bpf: split common macros to net_shared.h Currently, many programs under sample/bpf often include individual macros by directly including the header under "linux/" rather than using the "vmlinux.h" header. However, there are some problems with migrating to "vmlinux.h" because there is no definition for utility functions such as endianness conversion (ntohs/htons). Fortunately, the xdp_sample program already has a function that can be replaced to solve this problem. Therefore, this commit attempts to separate these functions into a file called net_shared.h to make them universally available. Additionally, this file includes network-related macros that are not defined in "vmlinux.h". (inspired by 'selftests' bpf_tracing_net.h) Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20230115071613.125791-8-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2023-01-15 10:16:10 +03:00
#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define bpf_ntohs(x) __builtin_bswap16(x)
#define bpf_htons(x) __builtin_bswap16(x)
#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define bpf_ntohs(x) (x)
#define bpf_htons(x) (x)
#else
# error "Endianness detection needs to be set up for your compiler?!"
#endif
#endif