diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/llc/llc_output.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (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.c | 79 |
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); |