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Diffstat (limited to 'net/packet/af_packet.c')
-rw-r--r--net/packet/af_packet.c67
1 files changed, 60 insertions, 7 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 8012f67ca..b43c4015b 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -93,6 +93,7 @@
#include <net/inet_common.h>
#endif
#include <linux/bpf.h>
+#include <net/compat.h>
#include "internal.h"
@@ -1837,6 +1838,7 @@ static int packet_sendmsg_spkt(struct socket *sock, struct msghdr *msg,
DECLARE_SOCKADDR(struct sockaddr_pkt *, saddr, msg->msg_name);
struct sk_buff *skb = NULL;
struct net_device *dev;
+ struct sockcm_cookie sockc;
__be16 proto = 0;
int err;
int extra_len = 0;
@@ -1925,12 +1927,19 @@ retry:
goto out_unlock;
}
+ sockc.tsflags = sk->sk_tsflags;
+ if (msg->msg_controllen) {
+ err = sock_cmsg_send(sk, msg, &sockc);
+ if (unlikely(err))
+ goto out_unlock;
+ }
+
skb->protocol = proto;
skb->dev = dev;
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
- sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags);
+ sock_tx_timestamp(sk, sockc.tsflags, &skb_shinfo(skb)->tx_flags);
if (unlikely(extra_len == 4))
skb->no_fcs = 1;
@@ -2042,6 +2051,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
u8 *skb_head = skb->data;
int skb_len = skb->len;
unsigned int snaplen, res;
+ bool is_drop_n_account = false;
if (skb->pkt_type == PACKET_LOOPBACK)
goto drop;
@@ -2130,6 +2140,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
return 0;
drop_n_acct:
+ is_drop_n_account = true;
spin_lock(&sk->sk_receive_queue.lock);
po->stats.stats1.tp_drops++;
atomic_inc(&sk->sk_drops);
@@ -2141,7 +2152,10 @@ drop_n_restore:
skb->len = skb_len;
}
drop:
- consume_skb(skb);
+ if (!is_drop_n_account)
+ consume_skb(skb);
+ else
+ kfree_skb(skb);
return 0;
}
@@ -2160,6 +2174,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
struct sk_buff *copy_skb = NULL;
struct timespec ts;
__u32 ts_status;
+ bool is_drop_n_account = false;
/* struct tpacket{2,3}_hdr is aligned to a multiple of TPACKET_ALIGNMENT.
* We may add members to them until current aligned size without forcing
@@ -2367,10 +2382,14 @@ drop_n_restore:
skb->len = skb_len;
}
drop:
- kfree_skb(skb);
+ if (!is_drop_n_account)
+ consume_skb(skb);
+ else
+ kfree_skb(skb);
return 0;
drop_n_account:
+ is_drop_n_account = true;
po->stats.stats1.tp_drops++;
spin_unlock(&sk->sk_receive_queue.lock);
@@ -2486,7 +2505,8 @@ static int packet_snd_vnet_gso(struct sk_buff *skb,
static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
void *frame, struct net_device *dev, void *data, int tp_len,
- __be16 proto, unsigned char *addr, int hlen, int copylen)
+ __be16 proto, unsigned char *addr, int hlen, int copylen,
+ const struct sockcm_cookie *sockc)
{
union tpacket_uhdr ph;
int to_write, offset, len, nr_frags, len_max;
@@ -2500,7 +2520,7 @@ static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
skb->dev = dev;
skb->priority = po->sk.sk_priority;
skb->mark = po->sk.sk_mark;
- sock_tx_timestamp(&po->sk, &skb_shinfo(skb)->tx_flags);
+ sock_tx_timestamp(&po->sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags);
skb_shinfo(skb)->destructor_arg = ph.raw;
skb_reserve(skb, hlen);
@@ -2624,6 +2644,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
struct sk_buff *skb;
struct net_device *dev;
struct virtio_net_hdr *vnet_hdr = NULL;
+ struct sockcm_cookie sockc;
__be16 proto;
int err, reserve = 0;
void *ph;
@@ -2655,6 +2676,13 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
dev = dev_get_by_index(sock_net(&po->sk), saddr->sll_ifindex);
}
+ sockc.tsflags = po->sk.sk_tsflags;
+ if (msg->msg_controllen) {
+ err = sock_cmsg_send(&po->sk, msg, &sockc);
+ if (unlikely(err))
+ goto out;
+ }
+
err = -ENXIO;
if (unlikely(dev == NULL))
goto out;
@@ -2712,7 +2740,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg)
goto out_status;
}
tp_len = tpacket_fill_skb(po, skb, ph, dev, data, tp_len, proto,
- addr, hlen, copylen);
+ addr, hlen, copylen, &sockc);
if (likely(tp_len >= 0) &&
tp_len > dev->mtu + reserve &&
!po->has_vnet_hdr &&
@@ -2851,6 +2879,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
if (unlikely(!(dev->flags & IFF_UP)))
goto out_unlock;
+ sockc.tsflags = sk->sk_tsflags;
sockc.mark = sk->sk_mark;
if (msg->msg_controllen) {
err = sock_cmsg_send(sk, msg, &sockc);
@@ -2908,7 +2937,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
goto out_free;
}
- sock_tx_timestamp(sk, &skb_shinfo(skb)->tx_flags);
+ sock_tx_timestamp(sk, sockc.tsflags, &skb_shinfo(skb)->tx_flags);
if (!vnet_hdr.gso_type && (len > dev->mtu + reserve + extra_len) &&
!packet_extra_vlan_len_allowed(dev, skb)) {
@@ -3910,6 +3939,27 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
}
+#ifdef CONFIG_COMPAT
+static int compat_packet_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, unsigned int optlen)
+{
+ struct packet_sock *po = pkt_sk(sock->sk);
+
+ if (level != SOL_PACKET)
+ return -ENOPROTOOPT;
+
+ if (optname == PACKET_FANOUT_DATA &&
+ po->fanout && po->fanout->type == PACKET_FANOUT_CBPF) {
+ optval = (char __user *)get_compat_bpf_fprog(optval);
+ if (!optval)
+ return -EFAULT;
+ optlen = sizeof(struct sock_fprog);
+ }
+
+ return packet_setsockopt(sock, level, optname, optval, optlen);
+}
+#endif
+
static int packet_notifier(struct notifier_block *this,
unsigned long msg, void *ptr)
{
@@ -4386,6 +4436,9 @@ static const struct proto_ops packet_ops = {
.shutdown = sock_no_shutdown,
.setsockopt = packet_setsockopt,
.getsockopt = packet_getsockopt,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_packet_setsockopt,
+#endif
.sendmsg = packet_sendmsg,
.recvmsg = packet_recvmsg,
.mmap = packet_mmap,
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-22 04:21:01 +0000