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authorWolfram Sang <wsa@the-dreams.de>2017-10-27 16:53:39 +0300
committerWolfram Sang <wsa@the-dreams.de>2017-10-27 16:53:39 +0300
commit9b09342f5cfa5b4b3447de17de284111bfdeab26 (patch)
treec71fcb17aecf0f77fb8e24f48feb07482f3cff77 /net/packet/af_packet.c
parentb9e43e363d0115ca981c106d968e24140ad37f6c (diff)
parent0224d45c9d46401b6d7018a96cfe049c5da7d91c (diff)
downloadlinux-9b09342f5cfa5b4b3447de17de284111bfdeab26.tar.xz
Merge branch 'i2c/cht-wc-fusb302-immutable' into i2c/for-4.15
Diffstat (limited to 'net/packet/af_packet.c')
-rw-r--r--net/packet/af_packet.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index bec01a3daf5b..2986941164b1 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1769,7 +1769,7 @@ static int fanout_add(struct sock *sk, u16 id, u16 type_flags)
out:
if (err && rollover) {
- kfree(rollover);
+ kfree_rcu(rollover, rcu);
po->rollover = NULL;
}
mutex_unlock(&fanout_mutex);
@@ -1796,8 +1796,10 @@ static struct packet_fanout *fanout_release(struct sock *sk)
else
f = NULL;
- if (po->rollover)
+ if (po->rollover) {
kfree_rcu(po->rollover, rcu);
+ po->rollover = NULL;
+ }
}
mutex_unlock(&fanout_mutex);
@@ -3851,6 +3853,7 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
void *data = &val;
union tpacket_stats_u st;
struct tpacket_rollover_stats rstats;
+ struct packet_rollover *rollover;
if (level != SOL_PACKET)
return -ENOPROTOOPT;
@@ -3929,13 +3932,18 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
0);
break;
case PACKET_ROLLOVER_STATS:
- if (!po->rollover)
+ rcu_read_lock();
+ rollover = rcu_dereference(po->rollover);
+ if (rollover) {
+ rstats.tp_all = atomic_long_read(&rollover->num);
+ rstats.tp_huge = atomic_long_read(&rollover->num_huge);
+ rstats.tp_failed = atomic_long_read(&rollover->num_failed);
+ data = &rstats;
+ lv = sizeof(rstats);
+ }
+ rcu_read_unlock();
+ if (!rollover)
return -EINVAL;
- rstats.tp_all = atomic_long_read(&po->rollover->num);
- rstats.tp_huge = atomic_long_read(&po->rollover->num_huge);
- rstats.tp_failed = atomic_long_read(&po->rollover->num_failed);
- data = &rstats;
- lv = sizeof(rstats);
break;
case PACKET_TX_HAS_OFF:
val = po->tp_tx_has_off;