diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2023-10-13 15:10:23 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-18 11:23:01 +0300 |
| commit | 2034d90ae41ae93e30d492ebcf1f06f97a9cfba6 (patch) | |
| tree | 8c16b208150b60347b4c6116d286726523245bc5 /include/net/net_namespace.h | |
| parent | ee2a35fedbc942e6eeb9e351a53acb1fe6b101c5 (diff) | |
| download | linux-2034d90ae41ae93e30d492ebcf1f06f97a9cfba6.tar.xz | |
net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu()
Make the net pointer stored in possible_net_t structure annotated as
an RCU pointer. Change the access helpers to treat it as such.
Introduce read_pnet_rcu() helper to allow caller to dereference
the net pointer under RCU read lock.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/net_namespace.h')
| -rw-r--r-- | include/net/net_namespace.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index eb6cd43b1746..13b3a4e29fdb 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -368,21 +368,30 @@ static inline void put_net_track(struct net *net, netns_tracker *tracker) typedef struct { #ifdef CONFIG_NET_NS - struct net *net; + struct net __rcu *net; #endif } possible_net_t; static inline void write_pnet(possible_net_t *pnet, struct net *net) { #ifdef CONFIG_NET_NS - pnet->net = net; + rcu_assign_pointer(pnet->net, net); #endif } static inline struct net *read_pnet(const possible_net_t *pnet) { #ifdef CONFIG_NET_NS - return pnet->net; + return rcu_dereference_protected(pnet->net, true); +#else + return &init_net; +#endif +} + +static inline struct net *read_pnet_rcu(possible_net_t *pnet) +{ +#ifdef CONFIG_NET_NS + return rcu_dereference(pnet->net); #else return &init_net; #endif |