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Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

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Daniel Borkmann says:

====================
pull-request: bpf 2018-10-14

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix xsk map update and delete operation to not call synchronize_net()
   but to piggy back on SOCK_RCU_FREE for sockets instead as we are not
   allowed to sleep under RCU, from Björn.

2) Do not change RLIMIT_MEMLOCK in reuseport_bpf selftest if the process
   already has unlimited RLIMIT_MEMLOCK, from Eric.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-10-14 13:01:20 -07:00
commit 028c99fa91
3 changed files with 13 additions and 12 deletions
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10
kernel/bpf/xskmap.c
View File

@ -192,11 +192,8 @@ static int xsk_map_update_elem(struct bpf_map *map, void *key, void *value,
sock_hold(sock->sk);
old_xs = xchg(&m->xsk_map[i], xs);
if (old_xs) {
/* Make sure we've flushed everything. */
synchronize_net();
if (old_xs)
sock_put((struct sock *)old_xs);
}
sockfd_put(sock);
return 0;
@ -212,11 +209,8 @@ static int xsk_map_delete_elem(struct bpf_map *map, void *key)
return -EINVAL;
old_xs = xchg(&m->xsk_map[k], NULL);
if (old_xs) {
/* Make sure we've flushed everything. */
synchronize_net();
if (old_xs)
sock_put((struct sock *)old_xs);
}
return 0;
}

2
net/xdp/xsk.c
View File

@ -744,6 +744,8 @@ static int xsk_create(struct net *net, struct socket *sock, int protocol,
sk->sk_destruct = xsk_destruct;
sk_refcnt_debug_inc(sk);
sock_set_flag(sk, SOCK_RCU_FREE);
xs = xdp_sk(sk);
mutex_init(&xs->mutex);
spin_lock_init(&xs->tx_completion_lock);

13
tools/testing/selftests/net/reuseport_bpf.c
View File

@ -437,14 +437,19 @@ void enable_fastopen(void)
}
}
static struct rlimit rlim_old, rlim_new;
static struct rlimit rlim_old;
static __attribute__((constructor)) void main_ctor(void)
{
getrlimit(RLIMIT_MEMLOCK, &rlim_old);
rlim_new.rlim_cur = rlim_old.rlim_cur + (1UL << 20);
rlim_new.rlim_max = rlim_old.rlim_max + (1UL << 20);
setrlimit(RLIMIT_MEMLOCK, &rlim_new);
if (rlim_old.rlim_cur != RLIM_INFINITY) {
struct rlimit rlim_new;
rlim_new.rlim_cur = rlim_old.rlim_cur + (1UL << 20);
rlim_new.rlim_max = rlim_old.rlim_max + (1UL << 20);
setrlimit(RLIMIT_MEMLOCK, &rlim_new);
}
}
static __attribute__((destructor)) void main_dtor(void)