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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

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Smooth Cong Wang's bug fix into 'net-next'.  Basically put
the bulk of the tcf_block_put() logic from 'net' into
tcf_block_put_ext(), but after the offload unbind.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2017-11-02 14:59:52 +09:00
parent 65c959a39b 3a99df9a3d
commit ed29668d1a
47 changed files with 285 additions and 170 deletions
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16
kernel/bpf/sockmap.c
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@@ -104,13 +104,19 @@ static inline void bpf_compute_data_end_sk_skb(struct sk_buff *skb)
TCP_SKB_CB(skb)->bpf.data_end = skb->data + skb_headlen(skb);
}
enum __sk_action {
__SK_DROP = 0,
__SK_PASS,
__SK_REDIRECT,
};
static int smap_verdict_func(struct smap_psock *psock, struct sk_buff *skb)
{
struct bpf_prog *prog = READ_ONCE(psock->bpf_verdict);
int rc;
if (unlikely(!prog))
return SK_DROP;
return __SK_DROP;
skb_orphan(skb);
/* We need to ensure that BPF metadata for maps is also cleared
@@ -125,8 +131,10 @@ static int smap_verdict_func(struct smap_psock *psock, struct sk_buff *skb)
preempt_enable();
skb->sk = NULL;
/* Moving return codes from UAPI namespace into internal namespace */
return rc == SK_PASS ?
(TCP_SKB_CB(skb)->bpf.map ? SK_REDIRECT : SK_PASS) : SK_DROP;
(TCP_SKB_CB(skb)->bpf.map ? __SK_REDIRECT : __SK_PASS) :
__SK_DROP;
}
static void smap_do_verdict(struct smap_psock *psock, struct sk_buff *skb)
@@ -136,7 +144,7 @@ static void smap_do_verdict(struct smap_psock *psock, struct sk_buff *skb)
rc = smap_verdict_func(psock, skb);
switch (rc) {
case SK_REDIRECT:
case __SK_REDIRECT:
sk = do_sk_redirect_map(skb);
if (likely(sk)) {
struct smap_psock *peer = smap_psock_sk(sk);
@@ -152,7 +160,7 @@ static void smap_do_verdict(struct smap_psock *psock, struct sk_buff *skb)
}
}
/* Fall through and free skb otherwise */
case SK_DROP:
case __SK_DROP:
default:
kfree_skb(skb);
}