107 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Scatterlist Cryptographic API.4 *5 * Procfs information.6 *7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>8 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>9 */10 11#include <linux/atomic.h>12#include <linux/init.h>13#include <linux/crypto.h>14#include <linux/fips.h>15#include <linux/module.h> /* for module_name() */16#include <linux/rwsem.h>17#include <linux/proc_fs.h>18#include <linux/seq_file.h>19#include "internal.h"20 21static void *c_start(struct seq_file *m, loff_t *pos)22{23 down_read(&crypto_alg_sem);24 return seq_list_start(&crypto_alg_list, *pos);25}26 27static void *c_next(struct seq_file *m, void *p, loff_t *pos)28{29 return seq_list_next(p, &crypto_alg_list, pos);30}31 32static void c_stop(struct seq_file *m, void *p)33{34 up_read(&crypto_alg_sem);35}36 37static int c_show(struct seq_file *m, void *p)38{39 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);40 41 seq_printf(m, "name : %s\n", alg->cra_name);42 seq_printf(m, "driver : %s\n", alg->cra_driver_name);43 seq_printf(m, "module : %s\n", module_name(alg->cra_module));44 seq_printf(m, "priority : %d\n", alg->cra_priority);45 seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));46 seq_printf(m, "selftest : %s\n",47 (alg->cra_flags & CRYPTO_ALG_TESTED) ?48 "passed" : "unknown");49 seq_printf(m, "internal : %s\n",50 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?51 "yes" : "no");52 if (fips_enabled) {53 seq_printf(m, "fips : %s\n",54 (alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL) ?55 "no" : "yes");56 }57 58 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {59 seq_printf(m, "type : larval\n");60 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);61 goto out;62 }63 64 if (alg->cra_type && alg->cra_type->show) {65 alg->cra_type->show(m, alg);66 goto out;67 }68 69 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {70 case CRYPTO_ALG_TYPE_CIPHER:71 seq_printf(m, "type : cipher\n");72 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);73 seq_printf(m, "min keysize : %u\n",74 alg->cra_cipher.cia_min_keysize);75 seq_printf(m, "max keysize : %u\n",76 alg->cra_cipher.cia_max_keysize);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 86out:87 seq_putc(m, '\n');88 return 0;89}90 91static const struct seq_operations crypto_seq_ops = {92 .start = c_start,93 .next = c_next,94 .stop = c_stop,95 .show = c_show96};97 98void __init crypto_init_proc(void)99{100 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);101}102 103void __exit crypto_exit_proc(void)104{105 remove_proc_entry("crypto", NULL);106}107