Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / atm / raw.c

diff --git a/kernel/net/atm/raw.c b/kernel/net/atm/raw.c
new file mode 100644 (file)
index 0000000..2e17e97
--- /dev/null
+++ b/kernel/net/atm/raw.c
@@ -0,0 +1,85 @@
+/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/atmdev.h>
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include "common.h"
+#include "protocols.h"
+
+/*
+ * SKB == NULL indicates that the link is being closed
+ */
+
+static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+       if (skb) {
+               struct sock *sk = sk_atm(vcc);
+
+               skb_queue_tail(&sk->sk_receive_queue, skb);
+               sk->sk_data_ready(sk);
+       }
+}
+
+static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+       struct sock *sk = sk_atm(vcc);
+
+       pr_debug("(%d) %d -= %d\n",
+                vcc->vci, sk_wmem_alloc_get(sk), skb->truesize);
+       atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
+       dev_kfree_skb_any(skb);
+       sk->sk_write_space(sk);
+}
+
+static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+       /*
+        * Note that if vpi/vci are _ANY or _UNSPEC the below will
+        * still work
+        */
+       if (!capable(CAP_NET_ADMIN) &&
+           (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
+           ((vcc->vpi << ATM_HDR_VPI_SHIFT) |
+            (vcc->vci << ATM_HDR_VCI_SHIFT))) {
+               kfree_skb(skb);
+               return -EADDRNOTAVAIL;
+       }
+       return vcc->dev->ops->send(vcc, skb);
+}
+
+int atm_init_aal0(struct atm_vcc *vcc)
+{
+       vcc->push = atm_push_raw;
+       vcc->pop = atm_pop_raw;
+       vcc->push_oam = NULL;
+       vcc->send = atm_send_aal0;
+       return 0;
+}
+
+int atm_init_aal34(struct atm_vcc *vcc)
+{
+       vcc->push = atm_push_raw;
+       vcc->pop = atm_pop_raw;
+       vcc->push_oam = NULL;
+       vcc->send = vcc->dev->ops->send;
+       return 0;
+}
+
+int atm_init_aal5(struct atm_vcc *vcc)
+{
+       vcc->push = atm_push_raw;
+       vcc->pop = atm_pop_raw;
+       vcc->push_oam = NULL;
+       vcc->send = vcc->dev->ops->send;
+       return 0;
+}
+EXPORT_SYMBOL(atm_init_aal5);