Alexei Starovoitov 9bac3d6d54 bpf: allow extended BPF programs access skb fields ... introduce user accessible mirror of in-kernel 'struct sk_buff': struct __sk_buff { __u32 len; __u32 pkt_type; __u32 mark; __u32 queue_mapping; }; bpf programs can do: int bpf_prog(struct __sk_buff *skb) { __u32 var = skb->pkt_type; which will be compiled to bpf assembler as: dst_reg = *(u32 *)(src_reg + 4) // 4 == offsetof(struct __sk_buff, pkt_type) bpf verifier will check validity of access and will convert it to: dst_reg = *(u8 *)(src_reg + offsetof(struct sk_buff, __pkt_type_offset)) dst_reg &= 7 since skb->pkt_type is a bitfield. Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-03-15 22:02:28 -04:00
..
arraymap.c	ebpf: constify various function pointer structs	2015-03-01 14:05:18 -05:00
core.c	ebpf: add helper for obtaining current processor id	2015-03-15 21:57:25 -04:00
hashtab.c	ebpf: constify various function pointer structs	2015-03-01 14:05:18 -05:00
helpers.c	ebpf: add helper for obtaining current processor id	2015-03-15 21:57:25 -04:00
Makefile	ebpf: remove kernel test stubs	2015-03-01 14:05:18 -05:00
syscall.c	bpf: allow extended BPF programs access skb fields	2015-03-15 22:02:28 -04:00
verifier.c	bpf: allow extended BPF programs access skb fields	2015-03-15 22:02:28 -04:00