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| author | Florian Westphal <fw@strlen.de> | 2015-05-11 20:50:41 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-13 22:08:14 +0300 |
| commit | e578d9c02587d57bfa7b560767c698a668a468c6 (patch) | |
| tree | a24a35260c20cae8a990ff71862ab68d92a04d84 /Documentation | |
| parent | b04096ff33a977c01c8780ca3ee129dbd641bad4 (diff) | |
| download | linux-e578d9c02587d57bfa7b560767c698a668a468c6.tar.xz | |
net: sched: use counter to break reclassify loops
Seems all we want here is to avoid endless 'goto reclassify' loop.
tc_classify_compat even resets this counter when something other
than TC_ACT_RECLASSIFY is returned, so this skb-counter doesn't
break hypothetical loops induced by something other than perpetual
TC_ACT_RECLASSIFY return values.
skb_act_clone is now identical to skb_clone, so just use that.
Tested with following (bogus) filter:
tc filter add dev eth0 parent ffff: \
protocol ip u32 match u32 0 0 police rate 10Kbit burst \
64000 mtu 1500 action reclassify
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/tc-actions-env-rules.txt | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/Documentation/networking/tc-actions-env-rules.txt b/Documentation/networking/tc-actions-env-rules.txt index 95c71716b2e2..f37814693ad3 100644 --- a/Documentation/networking/tc-actions-env-rules.txt +++ b/Documentation/networking/tc-actions-env-rules.txt @@ -8,10 +8,6 @@ For example if your action queues a packet to be processed later, or intentionally branches by redirecting a packet, then you need to clone the packet. -There are certain fields in the skb tc_verd that need to be reset so we -avoid loops, etc. A few are generic enough that skb_act_clone() -resets them for you, so invoke skb_act_clone() rather than skb_clone(). - 2) If you munge any packet thou shalt call pskb_expand_head in the case someone else is referencing the skb. After that you "own" the skb. |