diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2014-09-10 23:23:02 +0200 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-11-17 12:12:23 +0100 |
| commit | 4aed4f5eb5d904dbd14b91e576baeabd20d6bd0a (patch) | |
| tree | 56e7fb279431293f01282a0fd7a64cf55d0895c9 /net/ipv6 | |
| parent | c2cdf59f23781deb3f9c973df4ef895cbf88ee0d (diff) | |
ipv6: clean up anycast when an interface is destroyed
If we try to rmmod the driver for an interface while sockets with
setsockopt(JOIN_ANYCAST) are alive, some refcounts aren't cleaned up
and we get stuck on:
unregister_netdevice: waiting for ens3 to become free. Usage count = 1
If we LEAVE_ANYCAST/close everything before rmmod'ing, there is no
problem.
We need to perform a cleanup similar to the one for multicast in
addrconf_ifdown(how == 1).
BUG: 18902601
Bug: 19100303
Change-Id: I6d51aed5755eb5738fcba91950e7773a1c985d2e
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Patrick Tjin <pattjin@google.com>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/addrconf.c | 8 | ||||
| -rw-r--r-- | net/ipv6/anycast.c | 21 |
2 files changed, 26 insertions, 3 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 4c81c3f09..dcfc3bd4e 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3215,11 +3215,13 @@ static int addrconf_ifdown(struct net_device *dev, int how) write_unlock_bh(&idev->lock); - /* Step 5: Discard multicast list */ - if (how) + /* Step 5: Discard anycast and multicast list */ + if (how) { + ipv6_ac_destroy_dev(idev); ipv6_mc_destroy_dev(idev); - else + } else { ipv6_mc_down(idev); + } idev->tstamp = jiffies; diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c index 5a80f15a9..1e97d0886 100644 --- a/net/ipv6/anycast.c +++ b/net/ipv6/anycast.c @@ -341,6 +341,27 @@ static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr) return __ipv6_dev_ac_dec(idev, addr); } +void ipv6_ac_destroy_dev(struct inet6_dev *idev) +{ + struct ifacaddr6 *aca; + + write_lock_bh(&idev->lock); + while ((aca = idev->ac_list) != NULL) { + idev->ac_list = aca->aca_next; + write_unlock_bh(&idev->lock); + + addrconf_leave_solict(idev, &aca->aca_addr); + + dst_hold(&aca->aca_rt->dst); + ip6_del_rt(aca->aca_rt); + + aca_put(aca); + + write_lock_bh(&idev->lock); + } + write_unlock_bh(&idev->lock); +} + /* * check if the interface has this anycast address * called with rcu_read_lock() |