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tag: v2.6.28-rc7
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/*
* Scatterlist Cryptographic API.
*
* Procfs information.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
*
* 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.
*
*/

#include <asm/atomic.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/rwsem.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sysctl.h>
#include "internal.h"

#ifdef CONFIG_CRYPTO_FIPS
static struct ctl_table crypto_sysctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "fips_enabled",
.data = &fips_enabled,
.maxlen = sizeof(int),
.mode = 0444,
.proc_handler = &proc_dointvec
},
{
.ctl_name = 0,
},
};

static struct ctl_table crypto_dir_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "crypto",
.mode = 0555,
.child = crypto_sysctl_table
},
{
.ctl_name = 0,
},
};

static struct ctl_table_header *crypto_sysctls;

static void crypto_proc_fips_init(void)
{
crypto_sysctls = register_sysctl_table(crypto_dir_table);
}

static void crypto_proc_fips_exit(void)
{
if (crypto_sysctls)
unregister_sysctl_table(crypto_sysctls);
}
#else
#define crypto_proc_fips_init()
#define crypto_proc_fips_exit()
#endif

static void *c_start(struct seq_file *m, loff_t *pos)
{
down_read(&crypto_alg_sem);
return seq_list_start(&crypto_alg_list, *pos);
}

static void *c_next(struct seq_file *m, void *p, loff_t *pos)
{
return seq_list_next(p, &crypto_alg_list, pos);
}

static void c_stop(struct seq_file *m, void *p)
{
up_read(&crypto_alg_sem);
}

static int c_show(struct seq_file *m, void *p)
{
struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);

seq_printf(m, "name : %s\n", alg->cra_name);
seq_printf(m, "driver : %s\n", alg->cra_driver_name);
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
seq_printf(m, "priority : %d\n", alg->cra_priority);
seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
seq_printf(m, "selftest : %s\n",
(alg->cra_flags & CRYPTO_ALG_TESTED) ?
"passed" : "unknown");

switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
case CRYPTO_ALG_TYPE_CIPHER:
seq_printf(m, "type : cipher\n");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "min keysize : %u\n",
alg->cra_cipher.cia_min_keysize);
seq_printf(m, "max keysize : %u\n",
alg->cra_cipher.cia_max_keysize);
break;

case CRYPTO_ALG_TYPE_DIGEST:
seq_printf(m, "type : digest\n");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "digestsize : %u\n",
alg->cra_digest.dia_digestsize);
break;
case CRYPTO_ALG_TYPE_COMPRESS:
seq_printf(m, "type : compression\n");
break;
default:
if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
seq_printf(m, "type : larval\n");
seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
} else if (alg->cra_type && alg->cra_type->show)
alg->cra_type->show(m, alg);
else
seq_printf(m, "type : unknown\n");
break;
}

seq_putc(m, '\n');
return 0;
}

static const struct seq_operations crypto_seq_ops = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = c_show
};

static int crypto_info_open(struct inode *inode, struct file *file)
{
return seq_open(file, &crypto_seq_ops);
}
        
static const struct file_operations proc_crypto_ops = {
.open = crypto_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release
};

void __init crypto_init_proc(void)
{
proc_create("crypto", 0, NULL, &proc_crypto_ops);
crypto_proc_fips_init();
}

void __exit crypto_exit_proc(void)
{
crypto_proc_fips_exit();
remove_proc_entry("crypto", NULL);
}
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