ia64/xen-unstable

view tools/vnet/vnet-module/skb_context.c @ 6946:e703abaf6e3d

Add behaviour to the remove methods to remove the transaction's path itself. This allows us to write Remove(path) to remove the specified path rather than having to slice the path ourselves.
author emellor@ewan
date Sun Sep 18 14:42:13 2005 +0100 (2005-09-18)
parents 0a4b76b6b5a0
children
line source
1 /*
2 * Copyright (C) 2004 Mike Wray <mike.wray@hp.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free software Foundation, Inc.,
16 * 59 Temple Place, suite 330, Boston, MA 02111-1307 USA
17 *
18 */
19 #include <linux/config.h>
20 #include <linux/kernel.h>
21 #include <linux/skbuff.h>
22 #include <linux/slab.h>
24 #include <skb_context.h>
26 #define MODULE_NAME "VNET"
27 #define DEBUG 1
28 #undef DEBUG
29 #include "debug.h"
31 SkbContext *SkbContext_create(u32 vnet, u32 addr, int protocol, void *data,
32 void (*free_fn)(SkbContext *)){
33 SkbContext *context = NULL;
35 context = kmalloc(sizeof(SkbContext), GFP_ATOMIC);
36 if(!context) goto exit;
37 context->vnet = vnet;
38 context->addr = addr;
39 context->protocol = protocol;
40 context->data = data;
41 context->free_fn = free_fn;
42 context->next = NULL;
43 atomic_set(&context ->refcount, 1);
44 exit:
45 return context;
46 }
48 void SkbContext_free(SkbContext *context){
49 if(!context) return;
50 if(context->next) SkbContext_decref(context->next);
51 if(context->free_fn) context->free_fn(context);
52 context->vnet = 0;
53 context->addr = 0;
54 context->protocol = 0;
55 context->free_fn = NULL;
56 context->data = NULL;
57 context->next = NULL;
58 kfree(context);
59 }
61 int SkbContext_push(SkbContext **val, u32 vnet, u32 addr, int protocol,
62 void *data, void (*free_fn)(SkbContext *)){
63 int err = 0;
64 SkbContext *context = NULL;
66 dprintf("> vnet=%u addr=%u.%u.%u.%u protocol=%d\n",
67 vnet, NIPQUAD(addr), protocol);
68 context = SkbContext_create(vnet, addr, protocol, data, free_fn);
69 if(!context){
70 err = -ENOMEM;
71 goto exit;
72 }
73 context->next = *val;
74 *val = context;
75 exit:
76 dprintf("< err=%d\n", err);
77 return err;
78 }
80 int skb_push_context(struct sk_buff *skb, u32 vnet, u32 addr, int protocol,
81 void *data, void (*free_fn)(SkbContext *)){
82 int err = 0;
83 //SkbContext *ctxt = SKB_CONTEXT(skb);
84 dprintf("> skb=%p\n", skb);
86 //err = SkbContext_push(&ctxt, vnet, addr, protocol, data, free_fn); //todo fixme
87 //SKB_CONTEXT(skb) = ctxt;//todo fixme
88 dprintf("< err=%d\n", err);
89 return err;
90 }