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| author | Denis V. Lunev <den@openvz.org> | 2008-04-16 01:58:04 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-16 01:58:04 -0700 |
| commit | 5d1e4468a7705db7c1415a65fd16f07113afc1b2 (patch) | |
| tree | 41d34aa3f0e3b8cc0453973d8ce9e03303264080 /include/net | |
| parent | 554eb27782d4bb79e0a286a08ecafb81f758058c (diff) | |
| download | linux-5d1e4468a7705db7c1415a65fd16f07113afc1b2.tar.gz linux-5d1e4468a7705db7c1415a65fd16f07113afc1b2.tar.bz2 linux-5d1e4468a7705db7c1415a65fd16f07113afc1b2.zip | |
[NETNS]: Make netns refconting debug like a socket one.
Make release_net/hold_net noop for performance-hungry people. This is a debug
staff and should be used in the debug mode only.
Add check for net != NULL in hold/release calls. This will be required
later on.
[ Added minor simplifications suggested by Brian Haley. -DaveM ]
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/net_namespace.h | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index f880b0f9f107..aa540e6be502 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -26,9 +26,11 @@ struct net { atomic_t count; /* To decided when the network * namespace should be freed. */ +#ifdef NETNS_REFCNT_DEBUG atomic_t use_count; /* To track references we * destroy on demand */ +#endif struct list_head list; /* list of network namespaces */ struct work_struct work; /* work struct for freeing */ @@ -117,17 +119,6 @@ static inline void put_net(struct net *net) __put_net(net); } -static inline struct net *hold_net(struct net *net) -{ - atomic_inc(&net->use_count); - return net; -} - -static inline void release_net(struct net *net) -{ - atomic_dec(&net->use_count); -} - static inline int net_eq(const struct net *net1, const struct net *net2) { @@ -143,27 +134,44 @@ static inline void put_net(struct net *net) { } +static inline struct net *maybe_get_net(struct net *net) +{ + return net; +} + +static inline +int net_eq(const struct net *net1, const struct net *net2) +{ + return 1; +} +#endif + + +#ifdef NETNS_REFCNT_DEBUG static inline struct net *hold_net(struct net *net) { + if (net) + atomic_inc(&net->use_count); return net; } static inline void release_net(struct net *net) { + if (net) + atomic_dec(&net->use_count); } - -static inline struct net *maybe_get_net(struct net *net) +#else +static inline struct net *hold_net(struct net *net) { return net; } -static inline -int net_eq(const struct net *net1, const struct net *net2) +static inline void release_net(struct net *net) { - return 1; } #endif + #define for_each_net(VAR) \ list_for_each_entry(VAR, &net_namespace_list, list) |