1 /* 2 * Scatterlist Cryptographic API. 3 * 4 * Procfs information. 5 * 6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the Free 11 * Software Foundation; either version 2 of the License, or (at your option) 12 * any later version. 13 * 14 */ 15 16 #include <asm/atomic.h> 17 #include <linux/init.h> 18 #include <linux/crypto.h> 19 #include <linux/rwsem.h> 20 #include <linux/proc_fs.h> 21 #include <linux/seq_file.h> 22 #include "internal.h" 23 24 static void *c_start(struct seq_file *m, loff_t *pos) 25 { 26 down_read(&crypto_alg_sem); 27 return seq_list_start(&crypto_alg_list, *pos); 28 } 29 30 static void *c_next(struct seq_file *m, void *p, loff_t *pos) 31 { 32 return seq_list_next(p, &crypto_alg_list, pos); 33 } 34 35 static void c_stop(struct seq_file *m, void *p) 36 { 37 up_read(&crypto_alg_sem); 38 } 39 40 static int c_show(struct seq_file *m, void *p) 41 { 42 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); 43 44 seq_printf(m, "name : %s\n", alg->cra_name); 45 seq_printf(m, "driver : %s\n", alg->cra_driver_name); 46 seq_printf(m, "module : %s\n", module_name(alg->cra_module)); 47 seq_printf(m, "priority : %d\n", alg->cra_priority); 48 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt)); 49 50 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { 51 case CRYPTO_ALG_TYPE_CIPHER: 52 seq_printf(m, "type : cipher\n"); 53 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 54 seq_printf(m, "min keysize : %u\n", 55 alg->cra_cipher.cia_min_keysize); 56 seq_printf(m, "max keysize : %u\n", 57 alg->cra_cipher.cia_max_keysize); 58 break; 59 60 case CRYPTO_ALG_TYPE_DIGEST: 61 seq_printf(m, "type : digest\n"); 62 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 63 seq_printf(m, "digestsize : %u\n", 64 alg->cra_digest.dia_digestsize); 65 break; 66 case CRYPTO_ALG_TYPE_COMPRESS: 67 seq_printf(m, "type : compression\n"); 68 break; 69 default: 70 if (alg->cra_type && alg->cra_type->show) 71 alg->cra_type->show(m, alg); 72 else 73 seq_printf(m, "type : unknown\n"); 74 break; 75 } 76 77 seq_putc(m, '\n'); 78 return 0; 79 } 80 81 static const struct seq_operations crypto_seq_ops = { 82 .start = c_start, 83 .next = c_next, 84 .stop = c_stop, 85 .show = c_show 86 }; 87 88 static int crypto_info_open(struct inode *inode, struct file *file) 89 { 90 return seq_open(file, &crypto_seq_ops); 91 } 92 93 static const struct file_operations proc_crypto_ops = { 94 .open = crypto_info_open, 95 .read = seq_read, 96 .llseek = seq_lseek, 97 .release = seq_release 98 }; 99 100 void __init crypto_init_proc(void) 101 { 102 proc_create("crypto", 0, NULL, &proc_crypto_ops); 103 } 104 105 void __exit crypto_exit_proc(void) 106 { 107 remove_proc_entry("crypto", NULL); 108 } 109