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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/llc/llc_output.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/llc/llc_output.c')
-rw-r--r--kernel/net/llc/llc_output.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/net/llc/llc_output.c b/kernel/net/llc/llc_output.c
new file mode 100644
index 000000000..94425e421
--- /dev/null
+++ b/kernel/net/llc/llc_output.c
@@ -0,0 +1,79 @@
+/*
+ * llc_output.c - LLC minimal output path
+ *
+ * Copyright (c) 1997 by Procom Technology, Inc.
+ * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program can be redistributed or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation.
+ * This program is distributed without any warranty or implied warranty
+ * of merchantability or fitness for a particular purpose.
+ *
+ * See the GNU General Public License version 2 for more details.
+ */
+
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/export.h>
+#include <net/llc.h>
+#include <net/llc_pdu.h>
+
+/**
+ * llc_mac_hdr_init - fills MAC header fields
+ * @skb: Address of the frame to initialize its MAC header
+ * @sa: The MAC source address
+ * @da: The MAC destination address
+ *
+ * Fills MAC header fields, depending on MAC type. Returns 0, If MAC type
+ * is a valid type and initialization completes correctly 1, otherwise.
+ */
+int llc_mac_hdr_init(struct sk_buff *skb,
+ const unsigned char *sa, const unsigned char *da)
+{
+ int rc = -EINVAL;
+
+ switch (skb->dev->type) {
+ case ARPHRD_ETHER:
+ case ARPHRD_LOOPBACK:
+ rc = dev_hard_header(skb, skb->dev, ETH_P_802_2, da, sa,
+ skb->len);
+ if (rc > 0)
+ rc = 0;
+ break;
+ default:
+ break;
+ }
+ return rc;
+}
+
+/**
+ * llc_build_and_send_ui_pkt - unitdata request interface for upper layers
+ * @sap: sap to use
+ * @skb: packet to send
+ * @dmac: destination mac address
+ * @dsap: destination sap
+ *
+ * Upper layers calls this function when upper layer wants to send data
+ * using connection-less mode communication (UI pdu).
+ *
+ * Accept data frame from network layer to be sent using connection-
+ * less mode communication; timeout/retries handled by network layer;
+ * package primitive as an event and send to SAP event handler
+ */
+int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb,
+ unsigned char *dmac, unsigned char dsap)
+{
+ int rc;
+ llc_pdu_header_init(skb, LLC_PDU_TYPE_U, sap->laddr.lsap,
+ dsap, LLC_PDU_CMD);
+ llc_pdu_init_as_ui_cmd(skb);
+ rc = llc_mac_hdr_init(skb, skb->dev->dev_addr, dmac);
+ if (likely(!rc))
+ rc = dev_queue_xmit(skb);
+ return rc;
+}
+
+EXPORT_SYMBOL(llc_mac_hdr_init);
+EXPORT_SYMBOL(llc_build_and_send_ui_pkt);