Now with the new ->preclassify() handler in place, {cls,act}_bpf can
set the skb->priority from an eBPF program based on various critera,
so that qdiscs like mqprio can pick it up.
Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
Acked-by: Alexei Starovoitov <a...@plumgrid.com>
---
net/core/filter.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index 3765ae1..a88ea8e 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1674,6 +1674,7 @@ static bool tc_cls_act_is_valid_access(int off, int size,
switch (off) {
case offsetof(struct __sk_buff, mark):
case offsetof(struct __sk_buff, tc_index):
+ case offsetof(struct __sk_buff, priority):
case offsetof(struct __sk_buff, cb[0]) ...
offsetof(struct __sk_buff, cb[4]):
break;
@@ -1715,8 +1716,12 @@ static u32 bpf_net_convert_ctx_access(enum
bpf_access_type type, int dst_reg,
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));
+ if (type == BPF_WRITE)
+ *insn++ = BPF_STX_MEM(BPF_W, dst_reg, src_reg,
+ offsetof(struct sk_buff,
priority));
+ else
+ *insn++ = BPF_LDX_MEM(BPF_W, dst_reg, src_reg,
+ offsetof(struct sk_buff,
priority));
break;
case offsetof(struct __sk_buff, ingress_ifindex):
--
1.9.3
--
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