diff options
| author | Daniel Xu <dxu@dxuuu.xyz> | 2023-07-21 14:22:45 -0600 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-07-28 16:52:08 -0700 |
| commit | 9abddac583d68e16258d5e0b95dc1b3ca1886173 (patch) | |
| tree | 065a0d905a6539561d7d3946816df8d4356f802e /net/ipv6 | |
| parent | ee932bf940d4f624041293fab216cb1783b5df6b (diff) | |
netfilter: defrag: Add glue hooks for enabling/disabling defrag
We want to be able to enable/disable IP packet defrag from core
bpf/netfilter code. In other words, execute code from core that could
possibly be built as a module.
To help avoid symbol resolution errors, use glue hooks that the modules
will register callbacks with during module init.
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Reviewed-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/f6a8824052441b72afe5285acedbd634bd3384c1.1689970773.git.dxu@dxuuu.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/netfilter/nf_defrag_ipv6_hooks.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c index cb4eb1d2c620..d59b296b4f51 100644 --- a/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c +++ b/net/ipv6/netfilter/nf_defrag_ipv6_hooks.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/skbuff.h> #include <linux/icmp.h> +#include <linux/rcupdate.h> #include <linux/sysctl.h> #include <net/ipv6_frag.h> @@ -96,6 +97,12 @@ static void __net_exit defrag6_net_exit(struct net *net) } } +static const struct nf_defrag_hook defrag_hook = { + .owner = THIS_MODULE, + .enable = nf_defrag_ipv6_enable, + .disable = nf_defrag_ipv6_disable, +}; + static struct pernet_operations defrag6_net_ops = { .exit = defrag6_net_exit, }; @@ -114,6 +121,9 @@ static int __init nf_defrag_init(void) pr_err("nf_defrag_ipv6: can't register pernet ops\n"); goto cleanup_frag6; } + + rcu_assign_pointer(nf_defrag_v6_hook, &defrag_hook); + return ret; cleanup_frag6: @@ -124,6 +134,7 @@ cleanup_frag6: static void __exit nf_defrag_fini(void) { + rcu_assign_pointer(nf_defrag_v6_hook, NULL); unregister_pernet_subsys(&defrag6_net_ops); nf_ct_frag6_cleanup(); } |