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| author | Daniel Xu <dxu@dxuuu.xyz> | 2023-07-21 22:22:46 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-29 01:52:08 +0200 |
| commit | 91721c2d02d3a0141df8a4787c7079b89b0d0607 (patch) | |
| tree | 6a8e7169d33bc9d348c46cfec854cbcbe825f24f /tools/include | |
| parent | netfilter: defrag: Add glue hooks for enabling/disabling defrag (diff) | |
| download | linux-91721c2d02d3a0141df8a4787c7079b89b0d0607.tar.xz linux-91721c2d02d3a0141df8a4787c7079b89b0d0607.zip | |
netfilter: bpf: Support BPF_F_NETFILTER_IP_DEFRAG in netfilter link
This commit adds support for enabling IP defrag using pre-existing
netfilter defrag support. Basically all the flag does is bump a refcnt
while the link the active. Checks are also added to ensure the prog
requesting defrag support is run _after_ netfilter defrag hooks.
We also take care to avoid any issues w.r.t. module unloading -- while
defrag is active on a link, the module is prevented from unloading.
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Reviewed-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/5cff26f97e55161b7d56b09ddcf5f8888a5add1d.1689970773.git.dxu@dxuuu.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 14fd26b09e4b..70da85200695 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -1188,6 +1188,11 @@ enum bpf_perf_event_type { */ #define BPF_F_KPROBE_MULTI_RETURN (1U << 0) +/* link_create.netfilter.flags used in LINK_CREATE command for + * BPF_PROG_TYPE_NETFILTER to enable IP packet defragmentation. + */ +#define BPF_F_NETFILTER_IP_DEFRAG (1U << 0) + /* When BPF ldimm64's insn[0].src_reg != 0 then this can have * the following extensions: * |