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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/rose/rose_loopback.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/rose/rose_loopback.c')
-rw-r--r-- | kernel/net/rose/rose_loopback.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/kernel/net/rose/rose_loopback.c b/kernel/net/rose/rose_loopback.c new file mode 100644 index 000000000..344456206 --- /dev/null +++ b/kernel/net/rose/rose_loopback.c @@ -0,0 +1,124 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) + */ +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/socket.h> +#include <linux/timer.h> +#include <net/ax25.h> +#include <linux/skbuff.h> +#include <net/rose.h> +#include <linux/init.h> + +static struct sk_buff_head loopback_queue; +static struct timer_list loopback_timer; + +static void rose_set_loopback_timer(void); + +void rose_loopback_init(void) +{ + skb_queue_head_init(&loopback_queue); + + init_timer(&loopback_timer); +} + +static int rose_loopback_running(void) +{ + return timer_pending(&loopback_timer); +} + +int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh) +{ + struct sk_buff *skbn; + + skbn = skb_clone(skb, GFP_ATOMIC); + + kfree_skb(skb); + + if (skbn != NULL) { + skb_queue_tail(&loopback_queue, skbn); + + if (!rose_loopback_running()) + rose_set_loopback_timer(); + } + + return 1; +} + +static void rose_loopback_timer(unsigned long); + +static void rose_set_loopback_timer(void) +{ + del_timer(&loopback_timer); + + loopback_timer.data = 0; + loopback_timer.function = &rose_loopback_timer; + loopback_timer.expires = jiffies + 10; + + add_timer(&loopback_timer); +} + +static void rose_loopback_timer(unsigned long param) +{ + struct sk_buff *skb; + struct net_device *dev; + rose_address *dest; + struct sock *sk; + unsigned short frametype; + unsigned int lci_i, lci_o; + + while ((skb = skb_dequeue(&loopback_queue)) != NULL) { + if (skb->len < ROSE_MIN_LEN) { + kfree_skb(skb); + continue; + } + lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); + frametype = skb->data[2]; + if (frametype == ROSE_CALL_REQUEST && + (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF || + skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] != + ROSE_CALL_REQ_ADDR_LEN_VAL)) { + kfree_skb(skb); + continue; + } + dest = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF); + lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i; + + skb_reset_transport_header(skb); + + sk = rose_find_socket(lci_o, rose_loopback_neigh); + if (sk) { + if (rose_process_rx_frame(sk, skb) == 0) + kfree_skb(skb); + continue; + } + + if (frametype == ROSE_CALL_REQUEST) { + if ((dev = rose_dev_get(dest)) != NULL) { + if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) + kfree_skb(skb); + } else { + kfree_skb(skb); + } + } else { + kfree_skb(skb); + } + } +} + +void __exit rose_loopback_clear(void) +{ + struct sk_buff *skb; + + del_timer(&loopback_timer); + + while ((skb = skb_dequeue(&loopback_queue)) != NULL) { + skb->sk = NULL; + kfree_skb(skb); + } +} |