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ipv6: Handle all fib6_nh in a nexthop in fib6_drop_pcpu_from 

Use nexthop_for_each_fib6_nh to walk all fib6_nh in a nexthop when
dropping 'from' reference in pcpu routes.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.4-dsi
David Ahern 2019-06-08 14:53:23 -07:00 committed by David S. Miller
parent f88c9aa12f
commit 2ab75bfb17
1 changed files with 27 additions and 4 deletions
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31
net/ipv6/ip6_fib.c
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@ -906,19 +906,42 @@ static void __fib6_drop_pcpu_from(struct fib6_nh *fib6_nh,
}
}
struct fib6_nh_pcpu_arg {
struct fib6_info *from;
const struct fib6_table *table;
};
static int fib6_nh_drop_pcpu_from(struct fib6_nh *nh, void *_arg)
{
struct fib6_nh_pcpu_arg *arg = _arg;
__fib6_drop_pcpu_from(nh, arg->from, arg->table);
return 0;
}
static void fib6_drop_pcpu_from(struct fib6_info *f6i,
const struct fib6_table *table)
{
struct fib6_nh *fib6_nh;
/* Make sure rt6_make_pcpu_route() wont add other percpu routes
* while we are cleaning them here.
*/
f6i->fib6_destroying = 1;
mb(); /* paired with the cmpxchg() in rt6_make_pcpu_route() */
fib6_nh = f6i->fib6_nh;
__fib6_drop_pcpu_from(fib6_nh, f6i, table);
if (f6i->nh) {
struct fib6_nh_pcpu_arg arg = {
.from = f6i,
.table = table
};
nexthop_for_each_fib6_nh(f6i->nh, fib6_nh_drop_pcpu_from,
&arg);
} else {
struct fib6_nh *fib6_nh;
fib6_nh = f6i->fib6_nh;
__fib6_drop_pcpu_from(fib6_nh, f6i, table);
}
}
static void fib6_purge_rt(struct fib6_info *rt, struct fib6_node *fn,