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 <linux/atomic.h> 17 #include <linux/init.h> 18 #include <linux/crypto.h> 19 #include <linux/module.h> /* for module_name() */ 20 #include <linux/rwsem.h> 21 #include <linux/proc_fs.h> 22 #include <linux/seq_file.h> 23 #include "internal.h" 24 25 static void *c_start(struct seq_file *m, loff_t *pos) 26 { 27 down_read(&crypto_alg_sem); 28 return seq_list_start(&crypto_alg_list, *pos); 29 } 30 31 static void *c_next(struct seq_file *m, void *p, loff_t *pos) 32 { 33 return seq_list_next(p, &crypto_alg_list, pos); 34 } 35 36 static void c_stop(struct seq_file *m, void *p) 37 { 38 up_read(&crypto_alg_sem); 39 } 40 41 static int c_show(struct seq_file *m, void *p) 42 { 43 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); 44 45 seq_printf(m, "name : %s\n", alg->cra_name); 46 seq_printf(m, "driver : %s\n", alg->cra_driver_name); 47 seq_printf(m, "module : %s\n", module_name(alg->cra_module)); 48 seq_printf(m, "priority : %d\n", alg->cra_priority); 49 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt)); 50 seq_printf(m, "selftest : %s\n", 51 (alg->cra_flags & CRYPTO_ALG_TESTED) ? 52 "passed" : "unknown"); 53 seq_printf(m, "internal : %s\n", 54 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ? 55 "yes" : "no"); 56 57 if (alg->cra_flags & CRYPTO_ALG_LARVAL) { 58 seq_printf(m, "type : larval\n"); 59 seq_printf(m, "flags : 0x%x\n", alg->cra_flags); 60 goto out; 61 } 62 63 if (alg->cra_type && alg->cra_type->show) { 64 alg->cra_type->show(m, alg); 65 goto out; 66 } 67 68 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { 69 case CRYPTO_ALG_TYPE_CIPHER: 70 seq_printf(m, "type : cipher\n"); 71 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 72 seq_printf(m, "min keysize : %u\n", 73 alg->cra_cipher.cia_min_keysize); 74 seq_printf(m, "max keysize : %u\n", 75 alg->cra_cipher.cia_max_keysize); 76 break; 77 case CRYPTO_ALG_TYPE_COMPRESS: 78 seq_printf(m, "type : compression\n"); 79 break; 80 default: 81 seq_printf(m, "type : unknown\n"); 82 break; 83 } 84 85 out: 86 seq_putc(m, '\n'); 87 return 0; 88 } 89 90 static const struct seq_operations crypto_seq_ops = { 91 .start = c_start, 92 .next = c_next, 93 .stop = c_stop, 94 .show = c_show 95 }; 96 97 static int crypto_info_open(struct inode *inode, struct file *file) 98 { 99 return seq_open(file, &crypto_seq_ops); 100 } 101 102 static const struct file_operations proc_crypto_ops = { 103 .open = crypto_info_open, 104 .read = seq_read, 105 .llseek = seq_lseek, 106 .release = seq_release 107 }; 108 109 void __init crypto_init_proc(void) 110 { 111 proc_create("crypto", 0, NULL, &proc_crypto_ops); 112 } 113 114 void __exit crypto_exit_proc(void) 115 { 116 remove_proc_entry("crypto", NULL); 117 } 118