| Message ID | 20210414161253.27586-4-fw@strlen.de (mailing list archive) |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | xfrm: minor cleanup and synchronize_rcu removal | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Guessed tree name to be net-next |
| netdev/subject_prefix | warning | Target tree name not specified in the subject |
| netdev/cc_maintainers | success | CCed 5 of 5 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 14 this patch: 14 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 25 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 14 this patch: 14 |
| netdev/header_inline | success | Link |
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 5a0ef4361e43..9313592fa01f 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -3480,18 +3480,22 @@ static int __net_init xfrm_user_net_init(struct net *net) return 0; } +static void __net_exit xfrm_user_net_pre_exit(struct net *net) +{ + RCU_INIT_POINTER(net->xfrm.nlsk, NULL); +} + static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) { struct net *net; - list_for_each_entry(net, net_exit_list, exit_list) - RCU_INIT_POINTER(net->xfrm.nlsk, NULL); - synchronize_net(); + list_for_each_entry(net, net_exit_list, exit_list) netlink_kernel_release(net->xfrm.nlsk_stash); } static struct pernet_operations xfrm_user_net_ops = { .init = xfrm_user_net_init, + .pre_exit = xfrm_user_net_pre_exit, .exit_batch = xfrm_user_net_exit, };
Use the new exit_pre hook to NULL the netlink socket. The net namespace core will do a synchronize_rcu() between the exit_pre and exit/exit_batch handlers. Signed-off-by: Florian Westphal <fw@strlen.de> --- net/xfrm/xfrm_user.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)