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| author | Kangmin Park <l4stpr0gr4m@gmail.com> | 2021-07-23 03:50:28 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-23 17:17:56 +0100 |
| commit | 6a6b83ca471c50a05d1b07bd9594469986106bed (patch) | |
| tree | 2b87644abea848de3b7087a77c20471ac8fa560e /net/mpls | |
| parent | 8cc236db1a91d0c91651595ba75942a583008455 (diff) | |
| download | linux-stable-6a6b83ca471c50a05d1b07bd9594469986106bed.tar.gz linux-stable-6a6b83ca471c50a05d1b07bd9594469986106bed.tar.bz2 linux-stable-6a6b83ca471c50a05d1b07bd9594469986106bed.zip | |
mpls: defer ttl decrement in mpls_forward()
Defer ttl decrement to optimize in tx_err case. There is no need
to decrease ttl in the case of goto tx_err.
Signed-off-by: Kangmin Park <l4stpr0gr4m@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mpls')
| -rw-r--r-- | net/mpls/af_mpls.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c index 05a21dd072df..ffeb2df8be7a 100644 --- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -407,7 +407,6 @@ static int mpls_forward(struct sk_buff *skb, struct net_device *dev, /* Verify ttl is valid */ if (dec.ttl <= 1) goto err; - dec.ttl -= 1; /* Find the output device */ out_dev = rcu_dereference(nh->nh_dev); @@ -431,6 +430,7 @@ static int mpls_forward(struct sk_buff *skb, struct net_device *dev, skb->dev = out_dev; skb->protocol = htons(ETH_P_MPLS_UC); + dec.ttl -= 1; if (unlikely(!new_header_size && dec.bos)) { /* Penultimate hop popping */ if (!mpls_egress(dev_net(out_dev), rt, skb, dec)) |