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| author | Wenyu Zhang <wenyuz@vmware.com> | 2015-08-05 10:30:47 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-07 22:00:38 +0300 |
| commit | e05176a3283822bd32a1f3d929ce2050232299a8 (patch) | |
| tree | 3a3ea7c2e7dcfc2b396128fd598d31c7a85dfa91 /net/openvswitch | |
| parent | da8b43c0e1dcea3bcac5f37ea59934ddaa137aed (diff) | |
| download | linux-e05176a3283822bd32a1f3d929ce2050232299a8.tar.xz | |
openvswitch: Make 100 percents packets sampled when sampling rate is 1.
When sampling rate is 1, the sampling probability is UINT32_MAX. The packet
should be sampled even the prandom32() generate the number of UINT32_MAX.
And none packet need be sampled when the probability is 0.
Signed-off-by: Wenyu Zhang <wenyuz@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/actions.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index cf04c2f8b32a..a0ac410e9570 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -669,9 +669,12 @@ static int sample(struct datapath *dp, struct sk_buff *skb, for (a = nla_data(attr), rem = nla_len(attr); rem > 0; a = nla_next(a, &rem)) { + u32 probability; + switch (nla_type(a)) { case OVS_SAMPLE_ATTR_PROBABILITY: - if (prandom_u32() >= nla_get_u32(a)) + probability = nla_get_u32(a); + if (!probability || prandom_u32() > probability) return 0; break; |