diff options
| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2018-01-11 19:39:09 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-01-13 02:10:18 +0300 |
| commit | daaf24c634ab951cad3dcef28492001ef9c931d0 (patch) | |
| tree | cf07c30a4bba02bda9594f2f0be69e7c5ac8e1ec | |
| parent | 6bd39bc3da0f4a301fae69c4a32db2768f5118be (diff) | |
| download | linux-daaf24c634ab951cad3dcef28492001ef9c931d0.tar.xz | |
bpf: simplify xdp_convert_ctx_access for xdp_rxq_info
As pointed out by Daniel Borkmann, using bpf_target_off() is not
necessary for xdp_rxq_info when extracting queue_index and
ifindex, as these members are u32 like BPF_W.
Also fix trivial spelling mistake introduced in same commit.
Fixes: 02dd3291b2f0 ("bpf: finally expose xdp_rxq_info to XDP bpf-programs")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 | ||||
| -rw-r--r-- | net/core/filter.c | 7 |
2 files changed, 4 insertions, 5 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 405317f9c064..395d261948de 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -899,7 +899,7 @@ struct xdp_md { __u32 data; __u32 data_end; __u32 data_meta; - /* Below access go though struct xdp_rxq_info */ + /* Below access go through struct xdp_rxq_info */ __u32 ingress_ifindex; /* rxq->dev->ifindex */ __u32 rx_queue_index; /* rxq->queue_index */ }; diff --git a/net/core/filter.c b/net/core/filter.c index d4b190e63b79..db2ee8c7e1bd 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4310,16 +4310,15 @@ static u32 xdp_convert_ctx_access(enum bpf_access_type type, si->dst_reg, si->dst_reg, offsetof(struct xdp_rxq_info, dev)); *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->dst_reg, - bpf_target_off(struct net_device, - ifindex, 4, target_size)); + offsetof(struct net_device, ifindex)); break; case offsetof(struct xdp_md, rx_queue_index): *insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct xdp_buff, rxq), si->dst_reg, si->src_reg, offsetof(struct xdp_buff, rxq)); *insn++ = BPF_LDX_MEM(BPF_W, si->dst_reg, si->dst_reg, - bpf_target_off(struct xdp_rxq_info, - queue_index, 4, target_size)); + offsetof(struct xdp_rxq_info, + queue_index)); break; } |