diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2023-10-13 15:10:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 15:57:20 +0300 |
| commit | 4cfecb7fc742888bf31bd49cfa16dd6eb42641e6 (patch) | |
| tree | 17a26fb2e4c3d76888396f43f2615ab0964eb074 /include | |
| parent | afd983f102f8de01f59ec7ca5a8a49335ffe8c1a (diff) | |
| download | linux-4cfecb7fc742888bf31bd49cfa16dd6eb42641e6.tar.xz | |
net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu()
[ Upstream commit 2034d90ae41ae93e30d492ebcf1f06f97a9cfba6 ]
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>
Stable-dep-of: 71b8471c93fa ("ipv4: use RCU protection in ipv4_default_advmss()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -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 1befad79a673..b767bdcd9e12 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -369,21 +369,30 @@ 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 |