diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-12-15 08:29:18 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2017-12-15 16:18:18 +0300 |
| commit | 0d49eaf4db2ad18489ff1cfceba17006c1d17b7e (patch) | |
| tree | dfa5b9c1859a1657d4f61838b165ba8786000bc7 /drivers/net/ethernet/netronome/nfp/bpf/verifier.c | |
| parent | 2cb230bdedb1b422507359ebc39d8f134300bf01 (diff) | |
| download | linux-0d49eaf4db2ad18489ff1cfceba17006c1d17b7e.tar.xz | |
nfp: bpf: add basic support for adjust head call
Support bpf_xdp_adjust_head(). We need to check whether the
packet offset after adjustment is within datapath's limits.
We also check if the frame is at least ETH_HLEN long (similar
to the kernel implementation).
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/verifier.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index 3b940b682ac3..0a457d98666c 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -38,6 +38,7 @@ #include <linux/kernel.h> #include <linux/pkt_cls.h> +#include "fw.h" #include "main.h" struct nfp_insn_meta * @@ -71,9 +72,20 @@ nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, static int nfp_bpf_check_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) { + struct nfp_app_bpf *bpf = nfp_prog->bpf; u32 func_id = meta->insn.imm; switch (func_id) { + case BPF_FUNC_xdp_adjust_head: + if (!bpf->adjust_head.off_max) { + pr_warn("adjust_head not supported by FW\n"); + return -EOPNOTSUPP; + } + if (!(bpf->adjust_head.flags & NFP_BPF_ADJUST_HEAD_NO_META)) { + pr_warn("adjust_head: FW requires shifting metadata, not supported by the driver\n"); + return -EOPNOTSUPP; + } + break; default: pr_warn("unsupported function id: %d\n", func_id); return -EOPNOTSUPP; |