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net: openvswitch: set max limitation to meters

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Don't allow user to create meter unlimitedly, which may cause
to consume a large amount of kernel memory. The max number
supported is decided by physical memory and 20K meters as default.

Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Andy Zhou <azhou@ovn.org>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tonghao Zhang
2020-04-24 08:08:03 +08:00
committed by David S. Miller
parent c7c4c44c9a
commit eb58eebc7f
2 changed files with 49 additions and 10 deletions
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2
net/openvswitch/meter.h
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@@ -20,6 +20,7 @@ struct datapath;
#define DP_MAX_BANDS 1
#define DP_METER_ARRAY_SIZE_MIN BIT_ULL(10)
#define DP_METER_NUM_MAX (200000UL)
struct dp_meter_band {
u32 type;
@@ -50,6 +51,7 @@ struct dp_meter_instance {
struct dp_meter_table {
struct dp_meter_instance __rcu *ti;
u32 count;
u32 max_meters_allowed;
};
extern struct genl_family dp_meter_genl_family;