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net: initialize net->net_cookie at netns setup

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It is simpler to make net->net_cookie a plain u64
written once in setup_net() instead of looping
and using atomic64 helpers.

Lorenz Bauer wants to add SO_NETNS_COOKIE socket option
and this patch would makes his patch series simpler.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2021-02-10 06:41:44 -08:00
committed by David S. Miller
parent 06e56697bd
commit 3d368ab87c
3 changed files with 7 additions and 24 deletions
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4
include/net/net_namespace.h
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@@ -165,7 +165,7 @@ struct net {
struct netns_xfrm xfrm;
#endif
atomic64_t net_cookie; /* written once */
u64 net_cookie; /* written once */
#if IS_ENABLED(CONFIG_IP_VS)
struct netns_ipvs *ipvs;
@@ -224,8 +224,6 @@ extern struct list_head net_namespace_list;
struct net *get_net_ns_by_pid(pid_t pid);
struct net *get_net_ns_by_fd(int fd);
u64 __net_gen_cookie(struct net *net);
#ifdef CONFIG_SYSCTL
void ipx_register_sysctl(void);
void ipx_unregister_sysctl(void);