1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Scatterlist Cryptographic API.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Procfs information.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
8*4882a593Smuzhiyun * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/atomic.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/crypto.h>
14*4882a593Smuzhiyun #include <linux/module.h> /* for module_name() */
15*4882a593Smuzhiyun #include <linux/rwsem.h>
16*4882a593Smuzhiyun #include <linux/proc_fs.h>
17*4882a593Smuzhiyun #include <linux/seq_file.h>
18*4882a593Smuzhiyun #include "internal.h"
19*4882a593Smuzhiyun
c_start(struct seq_file * m,loff_t * pos)20*4882a593Smuzhiyun static void *c_start(struct seq_file *m, loff_t *pos)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun down_read(&crypto_alg_sem);
23*4882a593Smuzhiyun return seq_list_start(&crypto_alg_list, *pos);
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
c_next(struct seq_file * m,void * p,loff_t * pos)26*4882a593Smuzhiyun static void *c_next(struct seq_file *m, void *p, loff_t *pos)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return seq_list_next(p, &crypto_alg_list, pos);
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
c_stop(struct seq_file * m,void * p)31*4882a593Smuzhiyun static void c_stop(struct seq_file *m, void *p)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun up_read(&crypto_alg_sem);
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
c_show(struct seq_file * m,void * p)36*4882a593Smuzhiyun static int c_show(struct seq_file *m, void *p)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun seq_printf(m, "name : %s\n", alg->cra_name);
41*4882a593Smuzhiyun seq_printf(m, "driver : %s\n", alg->cra_driver_name);
42*4882a593Smuzhiyun seq_printf(m, "module : %s\n", module_name(alg->cra_module));
43*4882a593Smuzhiyun seq_printf(m, "priority : %d\n", alg->cra_priority);
44*4882a593Smuzhiyun seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
45*4882a593Smuzhiyun seq_printf(m, "selftest : %s\n",
46*4882a593Smuzhiyun (alg->cra_flags & CRYPTO_ALG_TESTED) ?
47*4882a593Smuzhiyun "passed" : "unknown");
48*4882a593Smuzhiyun seq_printf(m, "internal : %s\n",
49*4882a593Smuzhiyun (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
50*4882a593Smuzhiyun "yes" : "no");
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
53*4882a593Smuzhiyun seq_printf(m, "type : larval\n");
54*4882a593Smuzhiyun seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
55*4882a593Smuzhiyun goto out;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun if (alg->cra_type && alg->cra_type->show) {
59*4882a593Smuzhiyun alg->cra_type->show(m, alg);
60*4882a593Smuzhiyun goto out;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
64*4882a593Smuzhiyun case CRYPTO_ALG_TYPE_CIPHER:
65*4882a593Smuzhiyun seq_printf(m, "type : cipher\n");
66*4882a593Smuzhiyun seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
67*4882a593Smuzhiyun seq_printf(m, "min keysize : %u\n",
68*4882a593Smuzhiyun alg->cra_cipher.cia_min_keysize);
69*4882a593Smuzhiyun seq_printf(m, "max keysize : %u\n",
70*4882a593Smuzhiyun alg->cra_cipher.cia_max_keysize);
71*4882a593Smuzhiyun break;
72*4882a593Smuzhiyun case CRYPTO_ALG_TYPE_COMPRESS:
73*4882a593Smuzhiyun seq_printf(m, "type : compression\n");
74*4882a593Smuzhiyun break;
75*4882a593Smuzhiyun default:
76*4882a593Smuzhiyun seq_printf(m, "type : unknown\n");
77*4882a593Smuzhiyun break;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun out:
81*4882a593Smuzhiyun seq_putc(m, '\n');
82*4882a593Smuzhiyun return 0;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun static const struct seq_operations crypto_seq_ops = {
86*4882a593Smuzhiyun .start = c_start,
87*4882a593Smuzhiyun .next = c_next,
88*4882a593Smuzhiyun .stop = c_stop,
89*4882a593Smuzhiyun .show = c_show
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun
crypto_init_proc(void)92*4882a593Smuzhiyun void __init crypto_init_proc(void)
93*4882a593Smuzhiyun {
94*4882a593Smuzhiyun proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun
crypto_exit_proc(void)97*4882a593Smuzhiyun void __exit crypto_exit_proc(void)
98*4882a593Smuzhiyun {
99*4882a593Smuzhiyun remove_proc_entry("crypto", NULL);
100*4882a593Smuzhiyun }
101