freeswan/klips/net/ipsec_xscale/ipsec_glue_desc.c

   1 /*
   2  * IPSEC_GLUE_DESC interface code.
   3  * Copyright 2003 Intel Corporation All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14
  15  RCSID $Id: ipsec_glue_desc.c,v 1.0 2003/04/27 05:08:18 rgb Exp $
  16
  17  */
  18
  19 /*
  20  * Put the user defined include files required.
  21  */
  22 #include "IxTypes.h"
  23 #include "IxOsCacheMMU.h"
  24 #include "IxOsServices.h"
  25 #include <linux/in.h>
  26 #include <linux/slab.h>
  27 #include "ipsec_glue_desc.h"
  28 #include "ipsec_glue.h"
  29
  30 /*
  31  * Variable declarations global to this file only.  Externs are followed by
  32  * static variables.
  33  */
  34 static kmem_cache_t *ipsec_rcv_desc_cachep;
  35 static kmem_cache_t *ipsec_xmit_desc_cachep;
  36
  37
  38
  39 /**
  40  * ipsec_glue_rcv_desc_init
  41  *
  42  * Initialize ipsec_rcv descriptor management module.
  43  *
  44  * Returns: IPSEC_GLUE_STATUS_SUCCESS - Initialization is successful
  45  *                      IPSEC_GLUE_STATUS_FAIL - Initialization failure
  46  */
  47 int
  48 ipsec_glue_rcv_desc_init (void)
  49 {
  50     ipsec_rcv_desc_cachep = kmem_cache_create("ipsec_rcv_desc",
  51             IPSEC_RCV_DESC_SIZE, 0, 0, NULL, NULL);
  52     if (!ipsec_rcv_desc_cachep)
  53         return IPSEC_GLUE_STATUS_FAIL;
  54
  55     return IPSEC_GLUE_STATUS_SUCCESS;
  56
  57 } /* end of ipsec_glue_rcv_desc_init () function */
  58
  59
  60 /**
  61  * ipsec_glue_rcv_desc_get
  62  *
  63  * Get descriptor from the ipsec_rcv descriptor pool.
  64  *
  65  * Param : pIpsecRcvDescPtr [out] - Pointer to ipsec_rcv descriptor pointer
  66  *
  67  * Return : IPSEC_GLUE_STATUS_SUCCESS
  68  *          IPSEC_GLUE_STATUS_FAIL
  69  *
  70  */
  71 int
  72 ipsec_glue_rcv_desc_get (IpsecRcvDesc **pIpsecRcvDescPtr)
  73 {
  74     if (!ipsec_rcv_desc_cachep)
  75         return IPSEC_GLUE_STATUS_FAIL;
  76
  77     *pIpsecRcvDescPtr = kmem_cache_alloc(ipsec_rcv_desc_cachep, GFP_ATOMIC);
  78     if (!*pIpsecRcvDescPtr)
  79         return IPSEC_GLUE_STATUS_FAIL;
  80
  81     (*pIpsecRcvDescPtr)->stats = NULL;
  82     return IPSEC_GLUE_STATUS_SUCCESS;
  83 }
  84
  85
  86 /**
  87  * ipsec_glue_rcv_desc_release
  88  *
  89  * Release descriptor previously allocated back to the ipsec_rcv
  90  * descriptor pool
  91  *
  92  * Return : IPSEC_GLUE_STATUS_SUCCESS
  93  *          IPSEC_GLUE_STATUS_FAIL
  94  */
  95 int
  96 ipsec_glue_rcv_desc_release (IpsecRcvDesc *pIpsecRcvDesc)
  97 {
  98     if (!ipsec_rcv_desc_cachep)
  99         return IPSEC_GLUE_STATUS_FAIL;
 100
 101     kmem_cache_free(ipsec_rcv_desc_cachep, pIpsecRcvDesc);
 102     return IPSEC_GLUE_STATUS_SUCCESS;
 103 }
 104
 105
 106
 107
 108 /**
 109  * ipsec_rcv_desc_pool_free
 110  *
 111  * To free the memory allocated to descriptor pool through malloc
 112  *        function.
 113  *
 114  * Param : None
 115  * Return :  None
 116  *
 117  */
 118 void
 119 ipsec_rcv_desc_pool_free (void)
 120 {
 121     if (ipsec_rcv_desc_cachep && kmem_cache_destroy(ipsec_rcv_desc_cachep))
 122         ipsec_rcv_desc_cachep = NULL;
 123 }
 124
 125
 126
 127 /**
 128  * ipsec_glue_xmit_desc_init
 129  *
 130  * Initialize ipsec_xmit descriptor management module.
 131  *
 132  * Return:  IPSEC_GLUE_STATUS_SUCCESS
 133  *          IPSEC_GLUE_STATUS_FAIL
 134  **/
 135 int
 136 ipsec_glue_xmit_desc_init (void)
 137 {
 138     ipsec_xmit_desc_cachep = kmem_cache_create("ipsec_xmit_desc",
 139             IPSEC_XMIT_DESC_SIZE, 0, 0, NULL, NULL);
 140     if (!ipsec_xmit_desc_cachep)
 141         return IPSEC_GLUE_STATUS_FAIL;
 142
 143     return IPSEC_GLUE_STATUS_SUCCESS;
 144 }
 145
 146
 147
 148 /**
 149  * ipsec_glue_xmit_desc_get
 150  *
 151  * Get descriptor from the ipsec_xmit descriptor pool.
 152  *
 153  * Param : pIpsecXmitDescPtr [out] - Pointer to ipsec_xmit descriptor pointer
 154  *
 155  * Return:  IPSEC_GLUE_STATUS_SUCCESS
 156  *          IPSEC_GLUE_STATUS_FAIL
 157  **/
 158 int
 159 ipsec_glue_xmit_desc_get (IpsecXmitDesc **pIpsecXmitDescPtr)
 160 {
 161     if (!ipsec_xmit_desc_cachep)
 162         return IPSEC_GLUE_STATUS_FAIL;
 163
 164     *pIpsecXmitDescPtr = kmem_cache_alloc(ipsec_xmit_desc_cachep, GFP_ATOMIC);
 165     if (!*pIpsecXmitDescPtr)
 166         return IPSEC_GLUE_STATUS_FAIL;
 167
 168     (*pIpsecXmitDescPtr)->tot_headroom = 0;
 169     (*pIpsecXmitDescPtr)->tot_tailroom = 0;
 170     (*pIpsecXmitDescPtr)->saved_header = NULL;
 171     (*pIpsecXmitDescPtr)->oskb = NULL;
 172     (*pIpsecXmitDescPtr)->pass = 0;
 173     memset((char*)&((*pIpsecXmitDescPtr)->tdb), 0, sizeof(struct ipsec_sa));
 174     return IPSEC_GLUE_STATUS_SUCCESS;
 175 }
 176
 177
 178
 179 /**
 180  * ipsec_glue_xmit_desc_release
 181  *
 182  * Release descriptor previously allocated back to the ipsec_xmit
 183  * descriptor pool
 184  *
 185  * pIpsecXmitDesc [in] - Pointer to ipsec_xmit descriptor
 186  *
 187  * Return:  IPSEC_GLUE_STATUS_SUCCESS
 188  *          IPSEC_GLUE_STATUS_FAIL
 189  *
 190  */
 191 int
 192 ipsec_glue_xmit_desc_release (IpsecXmitDesc *pIpsecXmitDesc)
 193 {
 194     if (!ipsec_xmit_desc_cachep)
 195         return IPSEC_GLUE_STATUS_FAIL;
 196
 197     kmem_cache_free(ipsec_xmit_desc_cachep, pIpsecXmitDesc);
 198     return IPSEC_GLUE_STATUS_SUCCESS;
 199 }
 200
 201
 202
 203 /**
 204  * ipsec_xmit_desc_pool_free
 205  *
 206  * To free the memory allocated to descriptor pool through malloc
 207  *        function.
 208  *
 209  * Param : None
 210  * Return :  None
 211  *
 212  */
 213 void
 214 ipsec_xmit_desc_pool_free (void)
 215 {
 216     if (ipsec_xmit_desc_cachep && kmem_cache_destroy(ipsec_xmit_desc_cachep))
 217         ipsec_xmit_desc_cachep = NULL;
 218 }