mirros/rockchip-kernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ebpf: move read-only fields to bpf_prog and shrink bpf_prog_aux

Browse Source 
is_gpl_compatible and prog_type should be moved directly into bpf_prog
as they stay immutable during bpf_prog's lifetime, are core attributes
and they can be locked as read-only later on via bpf_prog_select_runtime().

With a bit of rearranging, this also allows us to shrink bpf_prog_aux
to exactly 1 cacheline.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2015-03-01 12:31:47 +01:00
committed by David S. Miller
parent 96be4325f4
commit 24701ecea7
5 changed files with 11 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/filter.h
View File

@@ -308,9 +308,11 @@ struct bpf_binary_header {
struct bpf_prog {
u16 pages; /* Number of allocated pages */
bool jited; /* Is our filter JIT'ed? */
bool gpl_compatible; /* Is our filter GPL compatible? */
u32 len; /* Number of filter blocks */
struct sock_fprog_kern *orig_prog; /* Original BPF program */
enum bpf_prog_type type; /* Type of BPF program */
struct bpf_prog_aux *aux; /* Auxiliary fields */
struct sock_fprog_kern *orig_prog; /* Original BPF program */
unsigned int (*bpf_func)(const struct sk_buff *skb,
const struct bpf_insn *filter);
/* Instructions for interpreter */