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2b8693c061
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* Scatterlist Cryptographic API.
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*
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* Procfs information.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <asm/atomic.h>
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#include <linux/init.h>
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#include <linux/crypto.h>
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#include <linux/rwsem.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include "internal.h"
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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struct list_head *v;
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loff_t n = *pos;
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down_read(&crypto_alg_sem);
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list_for_each(v, &crypto_alg_list)
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if (!n--)
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return list_entry(v, struct crypto_alg, cra_list);
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return NULL;
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}
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static void *c_next(struct seq_file *m, void *p, loff_t *pos)
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{
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struct list_head *v = p;
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(*pos)++;
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v = v->next;
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return (v == &crypto_alg_list) ?
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NULL : list_entry(v, struct crypto_alg, cra_list);
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}
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static void c_stop(struct seq_file *m, void *p)
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{
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up_read(&crypto_alg_sem);
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}
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static int c_show(struct seq_file *m, void *p)
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{
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struct crypto_alg *alg = (struct crypto_alg *)p;
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seq_printf(m, "name : %s\n", alg->cra_name);
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seq_printf(m, "driver : %s\n", alg->cra_driver_name);
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seq_printf(m, "module : %s\n", module_name(alg->cra_module));
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seq_printf(m, "priority : %d\n", alg->cra_priority);
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seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
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switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
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case CRYPTO_ALG_TYPE_CIPHER:
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seq_printf(m, "type : cipher\n");
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seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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seq_printf(m, "min keysize : %u\n",
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alg->cra_cipher.cia_min_keysize);
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seq_printf(m, "max keysize : %u\n",
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alg->cra_cipher.cia_max_keysize);
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break;
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case CRYPTO_ALG_TYPE_DIGEST:
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seq_printf(m, "type : digest\n");
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seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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seq_printf(m, "digestsize : %u\n",
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alg->cra_digest.dia_digestsize);
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break;
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case CRYPTO_ALG_TYPE_COMPRESS:
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seq_printf(m, "type : compression\n");
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break;
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default:
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if (alg->cra_type && alg->cra_type->show)
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alg->cra_type->show(m, alg);
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else
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seq_printf(m, "type : unknown\n");
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break;
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}
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seq_putc(m, '\n');
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return 0;
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}
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static struct seq_operations crypto_seq_ops = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = c_show
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};
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static int crypto_info_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &crypto_seq_ops);
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}
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static const struct file_operations proc_crypto_ops = {
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.open = crypto_info_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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void __init crypto_init_proc(void)
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{
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struct proc_dir_entry *proc;
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proc = create_proc_entry("crypto", 0, NULL);
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if (proc)
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proc->proc_fops = &proc_crypto_ops;
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}
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void __exit crypto_exit_proc(void)
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{
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remove_proc_entry("crypto", NULL);
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}
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