drivers/staging/rtl8192u/ieee80211/proc.c

   1 /*
   2  * Scatterlist Cryptographic API.
   3  *
   4  * Procfs information.
   5  *
   6  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the Free
  10  * Software Foundation; either version 2 of the License, or (at your option)
  11  * any later version.
  12  *
  13  */
  14 #include <linux/init.h>
  15 //#include <linux/crypto.h>
  16 #include "rtl_crypto.h"
  17 #include <linux/rwsem.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/seq_file.h>
  20 #include "internal.h"
  21
  22 extern struct list_head crypto_alg_list;
  23 extern struct rw_semaphore crypto_alg_sem;
  24
  25 static void *c_start(struct seq_file *m, loff_t *pos)
  26 {
  27         struct list_head *v;
  28         loff_t n = *pos;
  29
  30         down_read(&crypto_alg_sem);
  31         list_for_each(v, &crypto_alg_list)
  32                 if (!n--)
  33                         return list_entry(v, struct crypto_alg, cra_list);
  34         return NULL;
  35 }
  36
  37 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
  38 {
  39         struct list_head *v = p;
  40
  41         (*pos)++;
  42         v = v->next;
  43         return (v == &crypto_alg_list) ?
  44                 NULL : list_entry(v, struct crypto_alg, cra_list);
  45 }
  46
  47 static void c_stop(struct seq_file *m, void *p)
  48 {
  49         up_read(&crypto_alg_sem);
  50 }
  51
  52 static int c_show(struct seq_file *m, void *p)
  53 {
  54         struct crypto_alg *alg = (struct crypto_alg *)p;
  55
  56         seq_printf(m, "name         : %s\n", alg->cra_name);
  57         seq_printf(m, "module       : %s\n",
  58                    (alg->cra_module ?
  59                     alg->cra_module->name :
  60                     "kernel"));
  61
  62         switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
  63         case CRYPTO_ALG_TYPE_CIPHER:
  64                 seq_printf(m, "type         : cipher\n");
  65                 seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
  66                 seq_printf(m, "min keysize  : %u\n",
  67                                         alg->cra_cipher.cia_min_keysize);
  68                 seq_printf(m, "max keysize  : %u\n",
  69                                         alg->cra_cipher.cia_max_keysize);
  70                 break;
  71
  72         case CRYPTO_ALG_TYPE_DIGEST:
  73                 seq_printf(m, "type         : digest\n");
  74                 seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
  75                 seq_printf(m, "digestsize   : %u\n",
  76                            alg->cra_digest.dia_digestsize);
  77                 break;
  78         case CRYPTO_ALG_TYPE_COMPRESS:
  79                 seq_printf(m, "type         : compression\n");
  80                 break;
  81         default:
  82                 seq_printf(m, "type         : unknown\n");
  83                 break;
  84         }
  85
  86         seq_putc(m, '\n');
  87         return 0;
  88 }
  89
  90 static struct seq_operations crypto_seq_ops = {
  91         .start          = c_start,
  92         .next           = c_next,
  93         .stop           = c_stop,
  94         .show           = c_show
  95 };
  96
  97 static int crypto_info_open(struct inode *inode, struct file *file)
  98 {
  99         return seq_open(file, &crypto_seq_ops);
 100 }
 101
 102 static struct file_operations proc_crypto_ops = {
 103         .open           = crypto_info_open,
 104         .read           = seq_read,
 105         .llseek         = seq_lseek,
 106         .release        = seq_release
 107 };
 108
 109 void __init crypto_init_proc(void)
 110 {
 111         struct proc_dir_entry *proc;
 112
 113         proc = create_proc_entry("crypto", 0, NULL);
 114         if (proc)
 115                 proc->proc_fops = &proc_crypto_ops;
 116 }