xiaomi-sm8450/android_kernel_xiaomi_sm8450
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
kernel/bpf/verifier.c
View File

@@ -852,7 +852,7 @@ static int check_call(struct verifier_env *env, int func_id)
}
/* eBPF programs must be GPL compatible to use GPL-ed functions */
if (!env->prog->aux->is_gpl_compatible && fn->gpl_only) {
if (!env->prog->gpl_compatible && fn->gpl_only) {
verbose("cannot call GPL only function from proprietary program\n");
return -EINVAL;
}
@@ -1205,7 +1205,7 @@ static int check_ld_abs(struct verifier_env *env, struct bpf_insn *insn)
struct reg_state *reg;
int i, err;
if (!may_access_skb(env->prog->aux->prog_type)) {
if (!may_access_skb(env->prog->type)) {
verbose("BPF_LD_ABS|IND instructions not allowed for this program type\n");
return -EINVAL;
}