diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-04-03 20:52:24 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-03 14:59:15 -0400 |
| commit | bcad57182425426dd4aa14deb27f97acb329f3cd (patch) | |
| tree | d534fef01490769c56a9246f9cf07dd681f0ecbe /net | |
| parent | 2e7056c433216f406b90a003aa0ba42e19d3bdcf (diff) | |
| download | linux-bcad57182425426dd4aa14deb27f97acb329f3cd.tar.bz2 | |
ebpf: add skb->priority to offset map for usage in {cls, act}_bpf
This adds the ability to read out the skb->priority from an eBPF
program, so that it can be taken into account from a tc filter
or action for the use-case where the priority is not being used
to directly override the filter classification in a qdisc, but
to tag traffic otherwise for the classifier; the priority can be
assigned from various places incl. user space, in future we may
also mangle it from an eBPF program.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 444a07e4f68d..955a7d77decd 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -1304,6 +1304,13 @@ static u32 sk_filter_convert_ctx_access(int dst_reg, int src_reg, int ctx_off, offsetof(struct sk_buff, vlan_proto)); break; + case offsetof(struct __sk_buff, priority): + BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, priority) != 4); + + *insn++ = BPF_LDX_MEM(BPF_W, dst_reg, src_reg, + offsetof(struct sk_buff, priority)); + break; + case offsetof(struct __sk_buff, mark): return convert_skb_access(SKF_AD_MARK, dst_reg, src_reg, insn); |