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-rw-r--r--drivers/nfc/pn533.c15
-rw-r--r--include/linux/nfc.h11
-rw-r--r--net/nfc/llcp/commands.c2
-rw-r--r--net/nfc/llcp/llcp.c60
-rw-r--r--net/nfc/llcp/llcp.h3
-rw-r--r--net/nfc/llcp/sock.c90
-rw-r--r--net/nfc/netlink.c46
7 files changed, 202 insertions, 25 deletions
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index d123444404c..97c440a8cd6 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -716,7 +716,7 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
void *arg, gfp_t flags)
{
struct pn533_cmd *cmd;
- int rc;
+ int rc = 0;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
@@ -729,16 +729,16 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
if (!rc)
dev->cmd_pending = 1;
- mutex_unlock(&dev->cmd_lock);
-
- return rc;
+ goto unlock;
}
nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
cmd = kzalloc(sizeof(struct pn533_cmd), flags);
- if (!cmd)
- return -ENOMEM;
+ if (!cmd) {
+ rc = -ENOMEM;
+ goto unlock;
+ }
INIT_LIST_HEAD(&cmd->queue);
cmd->out_frame = out_frame;
@@ -750,9 +750,10 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
list_add_tail(&cmd->queue, &dev->cmd_queue);
+unlock:
mutex_unlock(&dev->cmd_lock);
- return 0;
+ return rc;
}
struct pn533_sync_cmd_response {
diff --git a/include/linux/nfc.h b/include/linux/nfc.h
index 6189f27e305..d908d17da56 100644
--- a/include/linux/nfc.h
+++ b/include/linux/nfc.h
@@ -183,4 +183,15 @@ struct sockaddr_nfc_llcp {
#define NFC_HEADER_SIZE 1
+/**
+ * Pseudo-header info for raw socket packets
+ * First byte is the adapter index
+ * Second byte contains flags
+ * - 0x01 - Direction (0=RX, 1=TX)
+ * - 0x02-0x80 - Reserved
+ **/
+#define NFC_LLCP_RAW_HEADER_SIZE 2
+#define NFC_LLCP_DIRECTION_RX 0x00
+#define NFC_LLCP_DIRECTION_TX 0x01
+
#endif /*__LINUX_NFC_H */
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index b982b5b890d..c45ccd6c094 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -312,6 +312,8 @@ int nfc_llcp_send_symm(struct nfc_dev *dev)
skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
+ nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
+
return nfc_data_exchange(dev, local->target_idx, skb,
nfc_llcp_recv, local);
}
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 90ef4a17681..c12c5ef3d03 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -56,7 +56,7 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
llcp_sock = nfc_llcp_sock(sk);
- lock_sock(sk);
+ bh_lock_sock(sk);
if (sk->sk_state == LLCP_CONNECTED)
nfc_put_device(llcp_sock->dev);
@@ -68,26 +68,26 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
accept_queue) {
accept_sk = &lsk->sk;
- lock_sock(accept_sk);
+ bh_lock_sock(accept_sk);
nfc_llcp_accept_unlink(accept_sk);
accept_sk->sk_state = LLCP_CLOSED;
- release_sock(accept_sk);
+ bh_unlock_sock(accept_sk);
sock_orphan(accept_sk);
}
if (listen == true) {
- release_sock(sk);
+ bh_unlock_sock(sk);
continue;
}
}
sk->sk_state = LLCP_CLOSED;
- release_sock(sk);
+ bh_unlock_sock(sk);
sock_orphan(sk);
@@ -558,6 +558,46 @@ static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu)
sock->recv_ack_n = (sock->recv_n - 1) % 16;
}
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+ struct sk_buff *skb, u8 direction)
+{
+ struct hlist_node *node;
+ struct sk_buff *skb_copy = NULL, *nskb;
+ struct sock *sk;
+ u8 *data;
+
+ read_lock(&local->raw_sockets.lock);
+
+ sk_for_each(sk, node, &local->raw_sockets.head) {
+ if (sk->sk_state != LLCP_BOUND)
+ continue;
+
+ if (skb_copy == NULL) {
+ skb_copy = __pskb_copy(skb, NFC_LLCP_RAW_HEADER_SIZE,
+ GFP_ATOMIC);
+
+ if (skb_copy == NULL)
+ continue;
+
+ data = skb_push(skb_copy, NFC_LLCP_RAW_HEADER_SIZE);
+
+ data[0] = local->dev ? local->dev->idx : 0xFF;
+ data[1] = direction;
+ }
+
+ nskb = skb_clone(skb_copy, GFP_ATOMIC);
+ if (!nskb)
+ continue;
+
+ if (sock_queue_rcv_skb(sk, nskb))
+ kfree_skb(nskb);
+ }
+
+ read_unlock(&local->raw_sockets.lock);
+
+ kfree_skb(skb_copy);
+}
+
static void nfc_llcp_tx_work(struct work_struct *work)
{
struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
@@ -578,6 +618,9 @@ static void nfc_llcp_tx_work(struct work_struct *work)
DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, true);
+ nfc_llcp_send_to_raw_sock(local, skb,
+ NFC_LLCP_DIRECTION_TX);
+
ret = nfc_data_exchange(local->dev, local->target_idx,
skb, nfc_llcp_recv, local);
@@ -1022,6 +1065,8 @@ static void nfc_llcp_rx_work(struct work_struct *work)
print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
16, 1, skb->data, skb->len, true);
+ nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
+
switch (ptype) {
case LLCP_PDU_SYMM:
pr_debug("SYMM\n");
@@ -1156,8 +1201,9 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work);
- local->sockets.lock = __RW_LOCK_UNLOCKED(local->sockets.lock);
- local->connecting_sockets.lock = __RW_LOCK_UNLOCKED(local->connecting_sockets.lock);
+ rwlock_init(&local->sockets.lock);
+ rwlock_init(&local->connecting_sockets.lock);
+ rwlock_init(&local->raw_sockets.lock);
nfc_llcp_build_gb(local);
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index af395c9ceb0..fdb2d24e60b 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -86,6 +86,7 @@ struct nfc_llcp_local {
/* sockets array */
struct llcp_sock_list sockets;
struct llcp_sock_list connecting_sockets;
+ struct llcp_sock_list raw_sockets;
};
struct nfc_llcp_sock {
@@ -184,6 +185,8 @@ u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+ struct sk_buff *skb, u8 direction);
/* Sock API */
struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 6e188d4020b..40f056debf9 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -142,6 +142,60 @@ error:
return ret;
}
+static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
+ int alen)
+{
+ struct sock *sk = sock->sk;
+ struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+ struct nfc_llcp_local *local;
+ struct nfc_dev *dev;
+ struct sockaddr_nfc_llcp llcp_addr;
+ int len, ret = 0;
+
+ if (!addr || addr->sa_family != AF_NFC)
+ return -EINVAL;
+
+ pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
+
+ memset(&llcp_addr, 0, sizeof(llcp_addr));
+ len = min_t(unsigned int, sizeof(llcp_addr), alen);
+ memcpy(&llcp_addr, addr, len);
+
+ lock_sock(sk);
+
+ if (sk->sk_state != LLCP_CLOSED) {
+ ret = -EBADFD;
+ goto error;
+ }
+
+ dev = nfc_get_device(llcp_addr.dev_idx);
+ if (dev == NULL) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ local = nfc_llcp_find_local(dev);
+ if (local == NULL) {
+ ret = -ENODEV;
+ goto put_dev;
+ }
+
+ llcp_sock->dev = dev;
+ llcp_sock->local = nfc_llcp_local_get(local);
+ llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
+
+ nfc_llcp_sock_link(&local->raw_sockets, sk);
+
+ sk->sk_state = LLCP_BOUND;
+
+put_dev:
+ nfc_put_device(dev);
+
+error:
+ release_sock(sk);
+ return ret;
+}
+
static int llcp_sock_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
@@ -418,7 +472,10 @@ static int llcp_sock_release(struct socket *sock)
release_sock(sk);
- nfc_llcp_sock_unlink(&local->sockets, sk);
+ if (sock->type == SOCK_RAW)
+ nfc_llcp_sock_unlink(&local->raw_sockets, sk);
+ else
+ nfc_llcp_sock_unlink(&local->sockets, sk);
out:
sock_orphan(sk);
@@ -614,7 +671,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
if (!(flags & MSG_PEEK)) {
/* SOCK_STREAM: re-queue skb if it contains unreceived data */
- if (sk->sk_type == SOCK_STREAM) {
+ if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
skb_pull(skb, copied);
if (skb->len) {
skb_queue_head(&sk->sk_receive_queue, skb);
@@ -655,6 +712,26 @@ static const struct proto_ops llcp_sock_ops = {
.mmap = sock_no_mmap,
};
+static const struct proto_ops llcp_rawsock_ops = {
+ .family = PF_NFC,
+ .owner = THIS_MODULE,
+ .bind = llcp_raw_sock_bind,
+ .connect = sock_no_connect,
+ .release = llcp_sock_release,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = llcp_sock_getname,
+ .poll = llcp_sock_poll,
+ .ioctl = sock_no_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = sock_no_shutdown,
+ .setsockopt = sock_no_setsockopt,
+ .getsockopt = sock_no_getsockopt,
+ .sendmsg = sock_no_sendmsg,
+ .recvmsg = llcp_sock_recvmsg,
+ .mmap = sock_no_mmap,
+};
+
static void llcp_sock_destruct(struct sock *sk)
{
struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
@@ -732,10 +809,15 @@ static int llcp_sock_create(struct net *net, struct socket *sock,
pr_debug("%p\n", sock);
- if (sock->type != SOCK_STREAM && sock->type != SOCK_DGRAM)
+ if (sock->type != SOCK_STREAM &&
+ sock->type != SOCK_DGRAM &&
+ sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
- sock->ops = &llcp_sock_ops;
+ if (sock->type == SOCK_RAW)
+ sock->ops = &llcp_rawsock_ops;
+ else
+ sock->ops = &llcp_sock_ops;
sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC);
if (sk == NULL)
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 4c51714ee74..baa6af9500d 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -761,31 +761,63 @@ static struct genl_ops nfc_genl_ops[] = {
},
};
-static int nfc_genl_rcv_nl_event(struct notifier_block *this,
- unsigned long event, void *ptr)
+
+struct urelease_work {
+ struct work_struct w;
+ int pid;
+};
+
+static void nfc_urelease_event_work(struct work_struct *work)
{
- struct netlink_notify *n = ptr;
+ struct urelease_work *w = container_of(work, struct urelease_work, w);
struct class_dev_iter iter;
struct nfc_dev *dev;
- if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
- goto out;
+ pr_debug("pid %d\n", w->pid);
- pr_debug("NETLINK_URELEASE event from id %d\n", n->pid);
+ mutex_lock(&nfc_devlist_mutex);
nfc_device_iter_init(&iter);
dev = nfc_device_iter_next(&iter);
while (dev) {
- if (dev->genl_data.poll_req_pid == n->pid) {
+ mutex_lock(&dev->genl_data.genl_data_mutex);
+
+ if (dev->genl_data.poll_req_pid == w->pid) {
nfc_stop_poll(dev);
dev->genl_data.poll_req_pid = 0;
}
+
+ mutex_unlock(&dev->genl_data.genl_data_mutex);
+
dev = nfc_device_iter_next(&iter);
}
nfc_device_iter_exit(&iter);
+ mutex_unlock(&nfc_devlist_mutex);
+
+ kfree(w);
+}
+
+static int nfc_genl_rcv_nl_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct netlink_notify *n = ptr;
+ struct urelease_work *w;
+
+ if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
+ goto out;
+
+ pr_debug("NETLINK_URELEASE event from id %d\n", n->pid);
+
+ w = kmalloc(sizeof(*w), GFP_ATOMIC);
+ if (w) {
+ INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
+ w->pid = n->pid;
+ schedule_work((struct work_struct *) w);
+ }
+
out:
return NOTIFY_DONE;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-24 06:34:51 +0000