#include <linux/module.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/if_vlan.h>
+#include <linux/virtio_net.h>
#ifdef CONFIG_INET
#include <net/inet_common.h>
/* Private packet socket structures. */
-struct packet_mclist
-{
+struct packet_mclist {
struct packet_mclist *next;
int ifindex;
int count;
/* identical to struct packet_mreq except it has
* a longer address field.
*/
-struct packet_mreq_max
-{
+struct packet_mreq_max {
int mr_ifindex;
unsigned short mr_type;
unsigned short mr_alen;
unsigned char mr_address[MAX_ADDR_LEN];
};
-#ifdef CONFIG_PACKET_MMAP
static int packet_set_ring(struct sock *sk, struct tpacket_req *req,
int closing, int tx_ring);
struct packet_ring_buffer {
- char * *pg_vec;
+ char **pg_vec;
unsigned int head;
unsigned int frames_per_block;
unsigned int frame_size;
struct packet_sock;
static int tpacket_snd(struct packet_sock *po, struct msghdr *msg);
-#endif
static void packet_flush_mclist(struct sock *sk);
/* struct sock has to be the first member of packet_sock */
struct sock sk;
struct tpacket_stats stats;
-#ifdef CONFIG_PACKET_MMAP
struct packet_ring_buffer rx_ring;
struct packet_ring_buffer tx_ring;
int copy_thresh;
-#endif
- struct packet_type prot_hook;
spinlock_t bind_lock;
struct mutex pg_vec_lock;
unsigned int running:1, /* prot_hook is attached*/
auxdata:1,
- origdev:1;
+ origdev:1,
+ has_vnet_hdr:1;
int ifindex; /* bound device */
__be16 num;
struct packet_mclist *mclist;
-#ifdef CONFIG_PACKET_MMAP
atomic_t mapped;
enum tpacket_versions tp_version;
unsigned int tp_hdrlen;
unsigned int tp_reserve;
unsigned int tp_loss:1;
-#endif
+ struct packet_type prot_hook ____cacheline_aligned_in_smp;
};
struct packet_skb_cb {
#define PACKET_SKB_CB(__skb) ((struct packet_skb_cb *)((__skb)->cb))
-#ifdef CONFIG_PACKET_MMAP
-
static void __packet_set_status(struct packet_sock *po, void *frame, int status)
{
union {
flush_dcache_page(virt_to_page(&h.h2->tp_status));
break;
default:
- printk(KERN_ERR "TPACKET version not supported\n");
+ pr_err("TPACKET version not supported\n");
BUG();
}
flush_dcache_page(virt_to_page(&h.h2->tp_status));
return h.h2->tp_status;
default:
- printk(KERN_ERR "TPACKET version not supported\n");
+ pr_err("TPACKET version not supported\n");
BUG();
return 0;
}
buff->head = buff->head != buff->frame_max ? buff->head+1 : 0;
}
-#endif
-
static inline struct packet_sock *pkt_sk(struct sock *sk)
{
return (struct packet_sock *)sk;
WARN_ON(atomic_read(&sk->sk_wmem_alloc));
if (!sock_flag(sk, SOCK_DEAD)) {
- printk("Attempt to release alive packet socket: %p\n", sk);
+ pr_err("Attempt to release alive packet socket: %p\n", sk);
return;
}
static const struct proto_ops packet_ops_spkt;
-static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
+static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct sockaddr_pkt *spkt;
if (skb->pkt_type == PACKET_LOOPBACK)
goto out;
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto out;
- if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (skb == NULL)
goto oom;
/* drop any routing info */
- dst_release(skb->dst);
- skb->dst = NULL;
+ skb_dst_drop(skb);
/* drop conntrack reference */
nf_reset(skb);
* to prevent sockets using all the memory up.
*/
- if (sock_queue_rcv_skb(sk,skb) == 0)
+ if (sock_queue_rcv_skb(sk, skb) == 0)
return 0;
out:
struct msghdr *msg, size_t len)
{
struct sock *sk = sock->sk;
- struct sockaddr_pkt *saddr=(struct sockaddr_pkt *)msg->msg_name;
- struct sk_buff *skb;
+ struct sockaddr_pkt *saddr = (struct sockaddr_pkt *)msg->msg_name;
+ struct sk_buff *skb = NULL;
struct net_device *dev;
- __be16 proto=0;
+ __be16 proto = 0;
int err;
/*
* Get and verify the address.
*/
- if (saddr)
- {
+ if (saddr) {
if (msg->msg_namelen < sizeof(struct sockaddr))
- return(-EINVAL);
- if (msg->msg_namelen==sizeof(struct sockaddr_pkt))
- proto=saddr->spkt_protocol;
- }
- else
- return(-ENOTCONN); /* SOCK_PACKET must be sent giving an address */
+ return -EINVAL;
+ if (msg->msg_namelen == sizeof(struct sockaddr_pkt))
+ proto = saddr->spkt_protocol;
+ } else
+ return -ENOTCONN; /* SOCK_PACKET must be sent giving an address */
/*
* Find the device first to size check it
*/
saddr->spkt_device[13] = 0;
- dev = dev_get_by_name(sock_net(sk), saddr->spkt_device);
+retry:
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device);
err = -ENODEV;
if (dev == NULL)
goto out_unlock;
goto out_unlock;
/*
- * You may not queue a frame bigger than the mtu. This is the lowest level
- * raw protocol and you must do your own fragmentation at this level.
+ * You may not queue a frame bigger than the mtu. This is the lowest level
+ * raw protocol and you must do your own fragmentation at this level.
*/
err = -EMSGSIZE;
if (len > dev->mtu + dev->hard_header_len)
goto out_unlock;
- err = -ENOBUFS;
- skb = sock_wmalloc(sk, len + LL_RESERVED_SPACE(dev), 0, GFP_KERNEL);
-
- /*
- * If the write buffer is full, then tough. At this level the user gets to
- * deal with the problem - do your own algorithmic backoffs. That's far
- * more flexible.
- */
-
- if (skb == NULL)
- goto out_unlock;
-
- /*
- * Fill it in
- */
-
- /* FIXME: Save some space for broken drivers that write a
- * hard header at transmission time by themselves. PPP is the
- * notable one here. This should really be fixed at the driver level.
- */
- skb_reserve(skb, LL_RESERVED_SPACE(dev));
- skb_reset_network_header(skb);
-
- /* Try to align data part correctly */
- if (dev->header_ops) {
- skb->data -= dev->hard_header_len;
- skb->tail -= dev->hard_header_len;
- if (len < dev->hard_header_len)
- skb_reset_network_header(skb);
+ if (!skb) {
+ size_t reserved = LL_RESERVED_SPACE(dev);
+ unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0;
+
+ rcu_read_unlock();
+ skb = sock_wmalloc(sk, len + reserved, 0, GFP_KERNEL);
+ if (skb == NULL)
+ return -ENOBUFS;
+ /* FIXME: Save some space for broken drivers that write a hard
+ * header at transmission time by themselves. PPP is the notable
+ * one here. This should really be fixed at the driver level.
+ */
+ skb_reserve(skb, reserved);
+ skb_reset_network_header(skb);
+
+ /* Try to align data part correctly */
+ if (hhlen) {
+ skb->data -= hhlen;
+ skb->tail -= hhlen;
+ if (len < hhlen)
+ skb_reset_network_header(skb);
+ }
+ err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+ if (err)
+ goto out_free;
+ goto retry;
}
- /* Returns -EFAULT on error */
- err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
+
skb->protocol = proto;
skb->dev = dev;
skb->priority = sk->sk_priority;
- if (err)
- goto out_free;
-
- /*
- * Now send it
- */
+ skb->mark = sk->sk_mark;
dev_queue_xmit(skb);
- dev_put(dev);
- return(len);
+ rcu_read_unlock();
+ return len;
+out_unlock:
+ rcu_read_unlock();
out_free:
kfree_skb(skb);
-out_unlock:
- if (dev)
- dev_put(dev);
return err;
}
struct sk_filter *filter;
rcu_read_lock_bh();
- filter = rcu_dereference(sk->sk_filter);
+ filter = rcu_dereference_bh(sk->sk_filter);
if (filter != NULL)
res = sk_run_filter(skb, filter->insns, filter->len);
rcu_read_unlock_bh();
we will not harm anyone.
*/
-static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
+static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct sockaddr_ll *sll;
struct packet_sock *po;
- u8 * skb_head = skb->data;
+ u8 *skb_head = skb->data;
int skb_len = skb->len;
unsigned int snaplen, res;
sk = pt->af_packet_priv;
po = pkt_sk(sk);
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto drop;
skb->dev = dev;
skb_set_owner_r(skb, sk);
skb->dev = NULL;
- dst_release(skb->dst);
- skb->dst = NULL;
+ skb_dst_drop(skb);
/* drop conntrack reference */
nf_reset(skb);
spin_lock(&sk->sk_receive_queue.lock);
po->stats.tp_packets++;
+ skb->dropcount = atomic_read(&sk->sk_drops);
__skb_queue_tail(&sk->sk_receive_queue, skb);
spin_unlock(&sk->sk_receive_queue.lock);
sk->sk_data_ready(sk, skb->len);
return 0;
drop_n_acct:
- spin_lock(&sk->sk_receive_queue.lock);
- po->stats.tp_drops++;
- spin_unlock(&sk->sk_receive_queue.lock);
+ po->stats.tp_drops = atomic_inc_return(&sk->sk_drops);
drop_n_restore:
if (skb_head != skb->data && skb_shared(skb)) {
return 0;
}
-#ifdef CONFIG_PACKET_MMAP
-static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
+static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct packet_sock *po;
struct tpacket2_hdr *h2;
void *raw;
} h;
- u8 * skb_head = skb->data;
+ u8 *skb_head = skb->data;
int skb_len = skb->len;
unsigned int snaplen, res;
unsigned long status = TP_STATUS_LOSING|TP_STATUS_USER;
sk = pt->af_packet_priv;
po = pkt_sk(sk);
- if (dev_net(dev) != sock_net(sk))
+ if (!net_eq(dev_net(dev), sock_net(sk)))
goto drop;
if (dev->header_ops) {
getnstimeofday(&ts);
h.h2->tp_sec = ts.tv_sec;
h.h2->tp_nsec = ts.tv_nsec;
- h.h2->tp_vlan_tci = skb->vlan_tci;
+ h.h2->tp_vlan_tci = vlan_tx_tag_get(skb);
hdrlen = sizeof(*h.h2);
break;
default:
static void tpacket_destruct_skb(struct sk_buff *skb)
{
struct packet_sock *po = pkt_sk(skb->sk);
- void * ph;
+ void *ph;
BUG_ON(skb == NULL);
sock_wfree(skb);
}
-static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff * skb,
- void * frame, struct net_device *dev, int size_max,
- __be16 proto, unsigned char * addr)
+static int tpacket_fill_skb(struct packet_sock *po, struct sk_buff *skb,
+ void *frame, struct net_device *dev, int size_max,
+ __be16 proto, unsigned char *addr)
{
union {
struct tpacket_hdr *h1;
skb->protocol = proto;
skb->dev = dev;
skb->priority = po->sk.sk_priority;
+ skb->mark = po->sk.sk_mark;
skb_shinfo(skb)->destructor_arg = ph.raw;
switch (po->tp_version) {
break;
}
if (unlikely(tp_len > size_max)) {
- printk(KERN_ERR "packet size is too long (%d > %d)\n",
- tp_len, size_max);
+ pr_err("packet size is too long (%d > %d)\n", tp_len, size_max);
return -EMSGSIZE;
}
NULL, tp_len);
if (unlikely(err < 0))
return -EINVAL;
- } else if (dev->hard_header_len ) {
+ } else if (dev->hard_header_len) {
/* net device doesn't like empty head */
if (unlikely(tp_len <= dev->hard_header_len)) {
- printk(KERN_ERR "packet size is too short "
- "(%d < %d)\n", tp_len,
- dev->hard_header_len);
+ pr_err("packet size is too short (%d < %d)\n",
+ tp_len, dev->hard_header_len);
return -EINVAL;
}
nr_frags = skb_shinfo(skb)->nr_frags;
if (unlikely(nr_frags >= MAX_SKB_FRAGS)) {
- printk(KERN_ERR "Packet exceed the number "
- "of skb frags(%lu)\n",
- MAX_SKB_FRAGS);
+ pr_err("Packet exceed the number of skb frags(%lu)\n",
+ MAX_SKB_FRAGS);
return -EFAULT;
}
struct net_device *dev;
__be16 proto;
int ifindex, err, reserve = 0;
- void * ph;
- struct sockaddr_ll *saddr=(struct sockaddr_ll *)msg->msg_name;
+ void *ph;
+ struct sockaddr_ll *saddr = (struct sockaddr_ll *)msg->msg_name;
int tp_len, size_max;
unsigned char *addr;
int len_sum = 0;
goto out_put;
size_max = po->tx_ring.frame_size
- - sizeof(struct skb_shared_info)
- - po->tp_hdrlen
- - LL_ALLOCATED_SPACE(dev)
- - sizeof(struct sockaddr_ll);
+ - (po->tp_hdrlen - sizeof(struct sockaddr_ll));
if (size_max > dev->mtu + reserve)
size_max = dev->mtu + reserve;
status = TP_STATUS_SEND_REQUEST;
err = dev_queue_xmit(skb);
- if (unlikely(err > 0 && (err = net_xmit_errno(err)) != 0))
- goto out_xmit;
+ if (unlikely(err > 0)) {
+ err = net_xmit_errno(err);
+ if (err && __packet_get_status(po, ph) ==
+ TP_STATUS_AVAILABLE) {
+ /* skb was destructed already */
+ skb = NULL;
+ goto out_status;
+ }
+ /*
+ * skb was dropped but not destructed yet;
+ * let's treat it like congestion or err < 0
+ */
+ err = 0;
+ }
packet_increment_head(&po->tx_ring);
len_sum += tp_len;
- }
- while (likely((ph != NULL) || ((!(msg->msg_flags & MSG_DONTWAIT))
- && (atomic_read(&po->tx_ring.pending))))
- );
+ } while (likely((ph != NULL) ||
+ ((!(msg->msg_flags & MSG_DONTWAIT)) &&
+ (atomic_read(&po->tx_ring.pending))))
+ );
err = len_sum;
goto out_put;
-out_xmit:
- skb->destructor = sock_wfree;
- atomic_dec(&po->tx_ring.pending);
out_status:
__packet_set_status(po, ph, status);
kfree_skb(skb);
mutex_unlock(&po->pg_vec_lock);
return err;
}
-#endif
+
+static inline struct sk_buff *packet_alloc_skb(struct sock *sk, size_t prepad,
+ size_t reserve, size_t len,
+ size_t linear, int noblock,
+ int *err)
+{
+ struct sk_buff *skb;
+
+ /* Under a page? Don't bother with paged skb. */
+ if (prepad + len < PAGE_SIZE || !linear)
+ linear = len;
+
+ skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock,
+ err);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, reserve);
+ skb_put(skb, linear);
+ skb->data_len = len - linear;
+ skb->len += len - linear;
+
+ return skb;
+}
static int packet_snd(struct socket *sock,
struct msghdr *msg, size_t len)
{
struct sock *sk = sock->sk;
- struct sockaddr_ll *saddr=(struct sockaddr_ll *)msg->msg_name;
+ struct sockaddr_ll *saddr = (struct sockaddr_ll *)msg->msg_name;
struct sk_buff *skb;
struct net_device *dev;
__be16 proto;
unsigned char *addr;
int ifindex, err, reserve = 0;
+ struct virtio_net_hdr vnet_hdr = { 0 };
+ int offset = 0;
+ int vnet_hdr_len;
+ struct packet_sock *po = pkt_sk(sk);
+ unsigned short gso_type = 0;
/*
* Get and verify the address.
*/
if (saddr == NULL) {
- struct packet_sock *po = pkt_sk(sk);
-
ifindex = po->ifindex;
proto = po->num;
addr = NULL;
if (!(dev->flags & IFF_UP))
goto out_unlock;
+ if (po->has_vnet_hdr) {
+ vnet_hdr_len = sizeof(vnet_hdr);
+
+ err = -EINVAL;
+ if (len < vnet_hdr_len)
+ goto out_unlock;
+
+ len -= vnet_hdr_len;
+
+ err = memcpy_fromiovec((void *)&vnet_hdr, msg->msg_iov,
+ vnet_hdr_len);
+ if (err < 0)
+ goto out_unlock;
+
+ if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&
+ (vnet_hdr.csum_start + vnet_hdr.csum_offset + 2 >
+ vnet_hdr.hdr_len))
+ vnet_hdr.hdr_len = vnet_hdr.csum_start +
+ vnet_hdr.csum_offset + 2;
+
+ err = -EINVAL;
+ if (vnet_hdr.hdr_len > len)
+ goto out_unlock;
+
+ if (vnet_hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
+ switch (vnet_hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
+ case VIRTIO_NET_HDR_GSO_TCPV4:
+ gso_type = SKB_GSO_TCPV4;
+ break;
+ case VIRTIO_NET_HDR_GSO_TCPV6:
+ gso_type = SKB_GSO_TCPV6;
+ break;
+ case VIRTIO_NET_HDR_GSO_UDP:
+ gso_type = SKB_GSO_UDP;
+ break;
+ default:
+ goto out_unlock;
+ }
+
+ if (vnet_hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)
+ gso_type |= SKB_GSO_TCP_ECN;
+
+ if (vnet_hdr.gso_size == 0)
+ goto out_unlock;
+
+ }
+ }
+
err = -EMSGSIZE;
- if (len > dev->mtu+reserve)
+ if (!gso_type && (len > dev->mtu+reserve))
goto out_unlock;
- skb = sock_alloc_send_skb(sk, len + LL_ALLOCATED_SPACE(dev),
- msg->msg_flags & MSG_DONTWAIT, &err);
- if (skb==NULL)
+ err = -ENOBUFS;
+ skb = packet_alloc_skb(sk, LL_ALLOCATED_SPACE(dev),
+ LL_RESERVED_SPACE(dev), len, vnet_hdr.hdr_len,
+ msg->msg_flags & MSG_DONTWAIT, &err);
+ if (skb == NULL)
goto out_unlock;
- skb_reserve(skb, LL_RESERVED_SPACE(dev));
- skb_reset_network_header(skb);
+ skb_set_network_header(skb, reserve);
err = -EINVAL;
if (sock->type == SOCK_DGRAM &&
- dev_hard_header(skb, dev, ntohs(proto), addr, NULL, len) < 0)
+ (offset = dev_hard_header(skb, dev, ntohs(proto), addr, NULL, len)) < 0)
goto out_free;
/* Returns -EFAULT on error */
- err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len);
+ err = skb_copy_datagram_from_iovec(skb, offset, msg->msg_iov, 0, len);
if (err)
goto out_free;
skb->protocol = proto;
skb->dev = dev;
skb->priority = sk->sk_priority;
+ skb->mark = sk->sk_mark;
+
+ if (po->has_vnet_hdr) {
+ if (vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
+ if (!skb_partial_csum_set(skb, vnet_hdr.csum_start,
+ vnet_hdr.csum_offset)) {
+ err = -EINVAL;
+ goto out_free;
+ }
+ }
+
+ skb_shinfo(skb)->gso_size = vnet_hdr.gso_size;
+ skb_shinfo(skb)->gso_type = gso_type;
+
+ /* Header must be checked, and gso_segs computed. */
+ skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
+ skb_shinfo(skb)->gso_segs = 0;
+
+ len += vnet_hdr_len;
+ }
/*
* Now send it
dev_put(dev);
- return(len);
+ return len;
out_free:
kfree_skb(skb);
static int packet_sendmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len)
{
-#ifdef CONFIG_PACKET_MMAP
struct sock *sk = sock->sk;
struct packet_sock *po = pkt_sk(sk);
if (po->tx_ring.pg_vec)
return tpacket_snd(po, msg);
else
-#endif
return packet_snd(sock, msg, len);
}
struct sock *sk = sock->sk;
struct packet_sock *po;
struct net *net;
-#ifdef CONFIG_PACKET_MMAP
struct tpacket_req req;
-#endif
if (!sk)
return 0;
net = sock_net(sk);
po = pkt_sk(sk);
- write_lock_bh(&net->packet.sklist_lock);
- sk_del_node_init(sk);
+ spin_lock_bh(&net->packet.sklist_lock);
+ sk_del_node_init_rcu(sk);
sock_prot_inuse_add(net, sk->sk_prot, -1);
- write_unlock_bh(&net->packet.sklist_lock);
-
- /*
- * Unhook packet receive handler.
- */
+ spin_unlock_bh(&net->packet.sklist_lock);
+ spin_lock(&po->bind_lock);
if (po->running) {
/*
- * Remove the protocol hook
+ * Remove from protocol table
*/
- dev_remove_pack(&po->prot_hook);
po->running = 0;
po->num = 0;
+ __dev_remove_pack(&po->prot_hook);
__sock_put(sk);
}
+ spin_unlock(&po->bind_lock);
packet_flush_mclist(sk);
-#ifdef CONFIG_PACKET_MMAP
memset(&req, 0, sizeof(req));
if (po->rx_ring.pg_vec)
if (po->tx_ring.pg_vec)
packet_set_ring(sk, &req, 1, 1);
-#endif
+ synchronize_net();
/*
* Now the socket is dead. No more input will appear.
*/
-
sock_orphan(sk);
sock->sk = NULL;
* Bind a packet socket to a device
*/
-static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
+ int addr_len)
{
- struct sock *sk=sock->sk;
+ struct sock *sk = sock->sk;
char name[15];
struct net_device *dev;
int err = -ENODEV;
if (addr_len != sizeof(struct sockaddr))
return -EINVAL;
- strlcpy(name,uaddr->sa_data,sizeof(name));
+ strlcpy(name, uaddr->sa_data, sizeof(name));
dev = dev_get_by_name(sock_net(sk), name);
if (dev) {
static int packet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
- struct sockaddr_ll *sll = (struct sockaddr_ll*)uaddr;
- struct sock *sk=sock->sk;
+ struct sockaddr_ll *sll = (struct sockaddr_ll *)uaddr;
+ struct sock *sk = sock->sk;
struct net_device *dev = NULL;
int err;
* Create a packet of type SOCK_PACKET.
*/
-static int packet_create(struct net *net, struct socket *sock, int protocol)
+static int packet_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
struct sock *sk;
struct packet_sock *po;
po->running = 1;
}
- write_lock_bh(&net->packet.sklist_lock);
- sk_add_node(sk, &net->packet.sklist);
+ spin_lock_bh(&net->packet.sklist_lock);
+ sk_add_node_rcu(sk, &net->packet.sklist);
sock_prot_inuse_add(net, &packet_proto, 1);
- write_unlock_bh(&net->packet.sklist_lock);
- return(0);
+ spin_unlock_bh(&net->packet.sklist_lock);
+
+ return 0;
out:
return err;
}
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
+ int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT))
* but then it will block.
*/
- skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err);
+ skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
if (skb == NULL)
goto out;
+ if (pkt_sk(sk)->has_vnet_hdr) {
+ struct virtio_net_hdr vnet_hdr = { 0 };
+
+ err = -EINVAL;
+ vnet_hdr_len = sizeof(vnet_hdr);
+ if ((len -= vnet_hdr_len) < 0)
+ goto out_free;
+
+ if (skb_is_gso(skb)) {
+ struct skb_shared_info *sinfo = skb_shinfo(skb);
+
+ /* This is a hint as to how much should be linear. */
+ vnet_hdr.hdr_len = skb_headlen(skb);
+ vnet_hdr.gso_size = sinfo->gso_size;
+ if (sinfo->gso_type & SKB_GSO_TCPV4)
+ vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
+ else if (sinfo->gso_type & SKB_GSO_TCPV6)
+ vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+ else if (sinfo->gso_type & SKB_GSO_UDP)
+ vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
+ else if (sinfo->gso_type & SKB_GSO_FCOE)
+ goto out_free;
+ else
+ BUG();
+ if (sinfo->gso_type & SKB_GSO_TCP_ECN)
+ vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
+ } else
+ vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ vnet_hdr.csum_start = skb->csum_start -
+ skb_headroom(skb);
+ vnet_hdr.csum_offset = skb->csum_offset;
+ } /* else everything is zero */
+
+ err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
+ vnet_hdr_len);
+ if (err < 0)
+ goto out_free;
+ }
+
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
copied = skb->len;
- if (copied > len)
- {
- copied=len;
- msg->msg_flags|=MSG_TRUNC;
+ if (copied > len) {
+ copied = len;
+ msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
- sock_recv_timestamp(msg, sk, skb);
+ sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
- aux.tp_vlan_tci = skb->vlan_tci;
+ aux.tp_vlan_tci = vlan_tx_tag_get(skb);
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
- err = (flags&MSG_TRUNC) ? skb->len : copied;
+ err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
return -EOPNOTSUPP;
uaddr->sa_family = AF_PACKET;
- dev = dev_get_by_index(sock_net(sk), pkt_sk(sk)->ifindex);
- if (dev) {
+ rcu_read_lock();
+ dev = dev_get_by_index_rcu(sock_net(sk), pkt_sk(sk)->ifindex);
+ if (dev)
strlcpy(uaddr->sa_data, dev->name, 15);
- dev_put(dev);
- } else
+ else
memset(uaddr->sa_data, 0, 14);
+ rcu_read_unlock();
*uaddr_len = sizeof(*uaddr);
return 0;
struct net_device *dev;
struct sock *sk = sock->sk;
struct packet_sock *po = pkt_sk(sk);
- struct sockaddr_ll *sll = (struct sockaddr_ll*)uaddr;
+ DECLARE_SOCKADDR(struct sockaddr_ll *, sll, uaddr);
if (peer)
return -EOPNOTSUPP;
sll->sll_family = AF_PACKET;
sll->sll_ifindex = po->ifindex;
sll->sll_protocol = po->num;
- dev = dev_get_by_index(sock_net(sk), po->ifindex);
+ rcu_read_lock();
+ dev = dev_get_by_index_rcu(sock_net(sk), po->ifindex);
if (dev) {
sll->sll_hatype = dev->type;
sll->sll_halen = dev->addr_len;
memcpy(sll->sll_addr, dev->dev_addr, dev->addr_len);
- dev_put(dev);
} else {
sll->sll_hatype = 0; /* Bad: we have no ARPHRD_UNSPEC */
sll->sll_halen = 0;
}
+ rcu_read_unlock();
*uaddr_len = offsetof(struct sockaddr_ll, sll_addr) + sll->sll_halen;
return 0;
else
return dev_unicast_delete(dev, i->addr);
break;
- default:;
+ default:
+ break;
}
return 0;
}
static void packet_dev_mclist(struct net_device *dev, struct packet_mclist *i, int what)
{
- for ( ; i; i=i->next) {
+ for ( ; i; i = i->next) {
if (i->ifindex == dev->ifindex)
packet_dev_mc(dev, i, what);
}
goto done;
err = -EINVAL;
- if (mreq->mr_alen > dev->addr_len)
+ if (mreq->mr_alen != dev->addr_len)
goto done;
err = -ENOBUFS;
if (--ml->count == 0) {
struct net_device *dev;
*mlp = ml->next;
- dev = dev_get_by_index(sock_net(sk), ml->ifindex);
- if (dev) {
+ dev = __dev_get_by_index(sock_net(sk), ml->ifindex);
+ if (dev)
packet_dev_mc(dev, ml, -1);
- dev_put(dev);
- }
kfree(ml);
}
rtnl_unlock();
struct net_device *dev;
po->mclist = ml->next;
- if ((dev = dev_get_by_index(sock_net(sk), ml->ifindex)) != NULL) {
+ dev = __dev_get_by_index(sock_net(sk), ml->ifindex);
+ if (dev != NULL)
packet_dev_mc(dev, ml, -1);
- dev_put(dev);
- }
kfree(ml);
}
rtnl_unlock();
}
static int
-packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct packet_sock *po = pkt_sk(sk);
return -EINVAL;
if (len > sizeof(mreq))
len = sizeof(mreq);
- if (copy_from_user(&mreq,optval,len))
+ if (copy_from_user(&mreq, optval, len))
return -EFAULT;
if (len < (mreq.mr_alen + offsetof(struct packet_mreq, mr_address)))
return -EINVAL;
return ret;
}
-#ifdef CONFIG_PACKET_MMAP
case PACKET_RX_RING:
case PACKET_TX_RING:
{
struct tpacket_req req;
- if (optlen<sizeof(req))
+ if (optlen < sizeof(req))
+ return -EINVAL;
+ if (pkt_sk(sk)->has_vnet_hdr)
return -EINVAL;
- if (copy_from_user(&req,optval,sizeof(req)))
+ if (copy_from_user(&req, optval, sizeof(req)))
return -EFAULT;
return packet_set_ring(sk, &req, 0, optname == PACKET_TX_RING);
}
{
int val;
- if (optlen!=sizeof(val))
+ if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val,optval,sizeof(val)))
+ if (copy_from_user(&val, optval, sizeof(val)))
return -EFAULT;
pkt_sk(sk)->copy_thresh = val;
po->tp_loss = !!val;
return 0;
}
-#endif
case PACKET_AUXDATA:
{
int val;
po->origdev = !!val;
return 0;
}
+ case PACKET_VNET_HDR:
+ {
+ int val;
+
+ if (sock->type != SOCK_RAW)
+ return -EINVAL;
+ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec)
+ return -EBUSY;
+ if (optlen < sizeof(val))
+ return -EINVAL;
+ if (copy_from_user(&val, optval, sizeof(val)))
+ return -EFAULT;
+
+ po->has_vnet_hdr = !!val;
+ return 0;
+ }
default:
return -ENOPROTOOPT;
}
data = &val;
break;
-#ifdef CONFIG_PACKET_MMAP
+ case PACKET_VNET_HDR:
+ if (len > sizeof(int))
+ len = sizeof(int);
+ val = po->has_vnet_hdr;
+
+ data = &val;
+ break;
case PACKET_VERSION:
if (len > sizeof(int))
len = sizeof(int);
val = po->tp_loss;
data = &val;
break;
-#endif
default:
return -ENOPROTOOPT;
}
struct net_device *dev = data;
struct net *net = dev_net(dev);
- read_lock(&net->packet.sklist_lock);
- sk_for_each(sk, node, &net->packet.sklist) {
+ rcu_read_lock();
+ sk_for_each_rcu(sk, node, &net->packet.sklist) {
struct packet_sock *po = pkt_sk(sk);
switch (msg) {
}
break;
case NETDEV_UP:
- spin_lock(&po->bind_lock);
- if (dev->ifindex == po->ifindex && po->num &&
- !po->running) {
- dev_add_pack(&po->prot_hook);
- sock_hold(sk);
- po->running = 1;
+ if (dev->ifindex == po->ifindex) {
+ spin_lock(&po->bind_lock);
+ if (po->num && !po->running) {
+ dev_add_pack(&po->prot_hook);
+ sock_hold(sk);
+ po->running = 1;
+ }
+ spin_unlock(&po->bind_lock);
}
- spin_unlock(&po->bind_lock);
break;
}
}
- read_unlock(&net->packet.sklist_lock);
+ rcu_read_unlock();
return NOTIFY_DONE;
}
struct sock *sk = sock->sk;
switch (cmd) {
- case SIOCOUTQ:
- {
- int amount = atomic_read(&sk->sk_wmem_alloc);
- return put_user(amount, (int __user *)arg);
- }
- case SIOCINQ:
- {
- struct sk_buff *skb;
- int amount = 0;
-
- spin_lock_bh(&sk->sk_receive_queue.lock);
- skb = skb_peek(&sk->sk_receive_queue);
- if (skb)
- amount = skb->len;
- spin_unlock_bh(&sk->sk_receive_queue.lock);
- return put_user(amount, (int __user *)arg);
- }
- case SIOCGSTAMP:
- return sock_get_timestamp(sk, (struct timeval __user *)arg);
- case SIOCGSTAMPNS:
- return sock_get_timestampns(sk, (struct timespec __user *)arg);
+ case SIOCOUTQ:
+ {
+ int amount = sk_wmem_alloc_get(sk);
+
+ return put_user(amount, (int __user *)arg);
+ }
+ case SIOCINQ:
+ {
+ struct sk_buff *skb;
+ int amount = 0;
+
+ spin_lock_bh(&sk->sk_receive_queue.lock);
+ skb = skb_peek(&sk->sk_receive_queue);
+ if (skb)
+ amount = skb->len;
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
+ return put_user(amount, (int __user *)arg);
+ }
+ case SIOCGSTAMP:
+ return sock_get_timestamp(sk, (struct timeval __user *)arg);
+ case SIOCGSTAMPNS:
+ return sock_get_timestampns(sk, (struct timespec __user *)arg);
#ifdef CONFIG_INET
- case SIOCADDRT:
- case SIOCDELRT:
- case SIOCDARP:
- case SIOCGARP:
- case SIOCSARP:
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- case SIOCGIFBRDADDR:
- case SIOCSIFBRDADDR:
- case SIOCGIFNETMASK:
- case SIOCSIFNETMASK:
- case SIOCGIFDSTADDR:
- case SIOCSIFDSTADDR:
- case SIOCSIFFLAGS:
- if (!net_eq(sock_net(sk), &init_net))
- return -ENOIOCTLCMD;
- return inet_dgram_ops.ioctl(sock, cmd, arg);
+ case SIOCADDRT:
+ case SIOCDELRT:
+ case SIOCDARP:
+ case SIOCGARP:
+ case SIOCSARP:
+ case SIOCGIFADDR:
+ case SIOCSIFADDR:
+ case SIOCGIFBRDADDR:
+ case SIOCSIFBRDADDR:
+ case SIOCGIFNETMASK:
+ case SIOCSIFNETMASK:
+ case SIOCGIFDSTADDR:
+ case SIOCSIFDSTADDR:
+ case SIOCSIFFLAGS:
+ if (!net_eq(sock_net(sk), &init_net))
+ return -ENOIOCTLCMD;
+ return inet_dgram_ops.ioctl(sock, cmd, arg);
#endif
- default:
- return -ENOIOCTLCMD;
+ default:
+ return -ENOIOCTLCMD;
}
return 0;
}
-#ifndef CONFIG_PACKET_MMAP
-#define packet_mmap sock_no_mmap
-#define packet_poll datagram_poll
-#else
-
-static unsigned int packet_poll(struct file * file, struct socket *sock,
+static unsigned int packet_poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk;
static void packet_mm_open(struct vm_area_struct *vma)
{
struct file *file = vma->vm_file;
- struct socket * sock = file->private_data;
+ struct socket *sock = file->private_data;
struct sock *sk = sock->sk;
if (sk)
static void packet_mm_close(struct vm_area_struct *vma)
{
struct file *file = vma->vm_file;
- struct socket * sock = file->private_data;
+ struct socket *sock = file->private_data;
struct sock *sk = sock->sk;
if (sk)
atomic_dec(&pkt_sk(sk)->mapped);
}
-static struct vm_operations_struct packet_mmap_ops = {
- .open = packet_mm_open,
- .close =packet_mm_close,
+static const struct vm_operations_struct packet_mmap_ops = {
+ .open = packet_mm_open,
+ .close = packet_mm_close,
};
static void free_pg_vec(char **pg_vec, unsigned int order, unsigned int len)
skb_queue_purge(rb_queue);
#undef XC
if (atomic_read(&po->mapped))
- printk(KERN_DEBUG "packet_mmap: vma is busy: %d\n",
- atomic_read(&po->mapped));
+ pr_err("packet_mmap: vma is busy: %d\n",
+ atomic_read(&po->mapped));
}
mutex_unlock(&po->pg_vec_lock);
int pg_num;
for (pg_num = 0; pg_num < rb->pg_vec_pages;
- pg_num++,page++) {
+ pg_num++, page++) {
err = vm_insert_page(vma, start, page);
if (unlikely(err))
goto out;
mutex_unlock(&po->pg_vec_lock);
return err;
}
-#endif
-
static const struct proto_ops packet_ops_spkt = {
.family = PF_PACKET,
.sendpage = sock_no_sendpage,
};
-static struct net_proto_family packet_family_ops = {
+static const struct net_proto_family packet_family_ops = {
.family = PF_PACKET,
.create = packet_create,
.owner = THIS_MODULE,
};
static struct notifier_block packet_netdev_notifier = {
- .notifier_call =packet_notifier,
+ .notifier_call = packet_notifier,
};
#ifdef CONFIG_PROC_FS
-static inline struct sock *packet_seq_idx(struct net *net, loff_t off)
-{
- struct sock *s;
- struct hlist_node *node;
-
- sk_for_each(s, node, &net->packet.sklist) {
- if (!off--)
- return s;
- }
- return NULL;
-}
static void *packet_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(seq_file_net(seq)->packet.sklist_lock)
+ __acquires(RCU)
{
struct net *net = seq_file_net(seq);
- read_lock(&net->packet.sklist_lock);
- return *pos ? packet_seq_idx(net, *pos - 1) : SEQ_START_TOKEN;
+
+ rcu_read_lock();
+ return seq_hlist_start_head_rcu(&net->packet.sklist, *pos);
}
static void *packet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct net *net = seq_file_net(seq);
- ++*pos;
- return (v == SEQ_START_TOKEN)
- ? sk_head(&net->packet.sklist)
- : sk_next((struct sock*)v) ;
+ return seq_hlist_next_rcu(v, &net->packet.sklist, pos);
}
static void packet_seq_stop(struct seq_file *seq, void *v)
- __releases(seq_file_net(seq)->packet.sklist_lock)
+ __releases(RCU)
{
- struct net *net = seq_file_net(seq);
- read_unlock(&net->packet.sklist_lock);
+ rcu_read_unlock();
}
static int packet_seq_show(struct seq_file *seq, void *v)
if (v == SEQ_START_TOKEN)
seq_puts(seq, "sk RefCnt Type Proto Iface R Rmem User Inode\n");
else {
- struct sock *s = v;
+ struct sock *s = sk_entry(v);
const struct packet_sock *po = pkt_sk(s);
seq_printf(seq,
po->running,
atomic_read(&s->sk_rmem_alloc),
sock_i_uid(s),
- sock_i_ino(s) );
+ sock_i_ino(s));
}
return 0;
#endif
-static int packet_net_init(struct net *net)
+static int __net_init packet_net_init(struct net *net)
{
- rwlock_init(&net->packet.sklist_lock);
+ spin_lock_init(&net->packet.sklist_lock);
INIT_HLIST_HEAD(&net->packet.sklist);
if (!proc_net_fops_create(net, "packet", 0, &packet_seq_fops))
return 0;
}
-static void packet_net_exit(struct net *net)
+static void __net_exit packet_net_exit(struct net *net)
{
proc_net_remove(net, "packet");
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff