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| author | Nikolay Aleksandrov <nikolay@nvidia.com> | 2021-11-22 17:15:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-01 09:23:33 +0100 |
| commit | cca61bb1704236411ba907aaeaa6b073bb53861c (patch) | |
| tree | 9d08ab1e4c819b3ff51131ee02c0a1deb6dfe623 /include/net | |
| parent | ddd0518c1e09a0eb8928e4f7c8f9f6160a7bd732 (diff) | |
| download | linux-stable-cca61bb1704236411ba907aaeaa6b073bb53861c.tar.gz linux-stable-cca61bb1704236411ba907aaeaa6b073bb53861c.tar.bz2 linux-stable-cca61bb1704236411ba907aaeaa6b073bb53861c.zip | |
net: ipv6: add fib6_nh_release_dsts stub
[ Upstream commit 8837cbbf854246f5f4d565f21e6baa945d37aded ]
We need a way to release a fib6_nh's per-cpu dsts when replacing
nexthops otherwise we can end up with stale per-cpu dsts which hold net
device references, so add a new IPv6 stub called fib6_nh_release_dsts.
It must be used after an RCU grace period, so no new dsts can be created
through a group's nexthop entry.
Similar to fib6_nh_release it shouldn't be used if fib6_nh_init has failed
so it doesn't need a dummy stub when IPv6 is not enabled.
Fixes: 7bf4796dd099 ("nexthops: add support for replace")
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ip6_fib.h | 1 | ||||
| -rw-r--r-- | include/net/ipv6_stubs.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index bd0f1595bdc7..05ecaefeb632 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -451,6 +451,7 @@ int fib6_nh_init(struct net *net, struct fib6_nh *fib6_nh, struct fib6_config *cfg, gfp_t gfp_flags, struct netlink_ext_ack *extack); void fib6_nh_release(struct fib6_nh *fib6_nh); +void fib6_nh_release_dsts(struct fib6_nh *fib6_nh); int call_fib6_entry_notifiers(struct net *net, enum fib_event_type event_type, diff --git a/include/net/ipv6_stubs.h b/include/net/ipv6_stubs.h index 3e7d2c0e79ca..af9e127779ad 100644 --- a/include/net/ipv6_stubs.h +++ b/include/net/ipv6_stubs.h @@ -47,6 +47,7 @@ struct ipv6_stub { struct fib6_config *cfg, gfp_t gfp_flags, struct netlink_ext_ack *extack); void (*fib6_nh_release)(struct fib6_nh *fib6_nh); + void (*fib6_nh_release_dsts)(struct fib6_nh *fib6_nh); void (*fib6_update_sernum)(struct net *net, struct fib6_info *rt); int (*ip6_del_rt)(struct net *net, struct fib6_info *rt); void (*fib6_rt_update)(struct net *net, struct fib6_info *rt, |