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brintos / linux-shallow public Read only

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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