litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'Documentation/hwmon/lis3lv02d')

0 files changed, 0 insertions, 0 deletions

/* * Create default crypto algorithm instances. * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ #include <crypto/internal/aead.h> #include <linux/ctype.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kthread.h> #include <linux/module.h> #include <linux/notifier.h> #include <linux/rtnetlink.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/string.h> #include "internal.h" struct cryptomgr_param { struct rtattr *tb[CRYPTO_MAX_ATTRS + 2]; struct { struct rtattr attr; struct crypto_attr_type data; } type; union { struct rtattr attr; struct { struct rtattr attr; struct crypto_attr_alg data; } alg; struct { struct rtattr attr; struct crypto_attr_u32 data; } nu32; } attrs[CRYPTO_MAX_ATTRS]; char larval[CRYPTO_MAX_ALG_NAME]; char template[CRYPTO_MAX_ALG_NAME]; u32 otype; u32 omask; }; struct crypto_test_param { char driver[CRYPTO_MAX_ALG_NAME]; char alg[CRYPTO_MAX_ALG_NAME]; u32 type; }; static int cryptomgr_probe(void *data) { struct cryptomgr_param *param = data; struct crypto_template *tmpl; struct crypto_instance *inst; int err; tmpl = crypto_lookup_template(param->template); if (!tmpl) goto err; do { if (tmpl->create) { err = tmpl->create(tmpl, param->tb); continue; } inst = tmpl->alloc(param->tb); if (IS_ERR(inst)) err = PTR_ERR(inst); else if ((err = crypto_register_instance(tmpl, inst))) tmpl->free(inst); } while (err == -EAGAIN && !signal_pending(current)); crypto_tmpl_put(tmpl); if (err) goto err; out: kfree(param); module_put_and_exit(0); err: crypto_larval_error(param->larval, param->otype, param->omask); goto out; } static int cryptomgr_schedule_probe(struct crypto_larval *larval) { struct task_struct *thread; struct cryptomgr_param *param; const char *name = larval->alg.cra_name; const char *p; unsigned int len; int i; if (!try_module_get(THIS_MODULE)) goto err; param = kzalloc(sizeof(*param), GFP_KERNEL); if (!param) goto err_put_module; for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++) ; len = p - name; if (!len || *p != '(') goto err_free_param; memcpy(param->template, name, len); i = 0; for (;;) { int notnum = 0; name = ++p; len = 0; for (; isalnum(*p) || *p == '-' || *p == '_'; p++) notnum |= !isdigit(*p); if (*p == '(') { int recursion = 0; for (;;) { if (!*++p) goto err_free_param; if (*p == '(') recursion++; else if (*p == ')' && !recursion--) break; } notnum = 1; p++; } len = p - name; if (!len) goto err_free_param; if (notnum) { param->attrs[i].alg.attr.rta_len = sizeof(param->attrs[i].alg); param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG; memcpy(param->attrs[i].alg.data.name, name, len); } else { param->attrs[i].nu32.attr.rta_len = sizeof(param->attrs[i].nu32); param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32; param->attrs[i].nu32.data.num = simple_strtol(name, NULL, 0); } param->tb[i + 1] = &param->attrs[i].attr; i++; if (i >= CRYPTO_MAX_ATTRS) goto err_free_param; if (*p == ')') break; if (*p != ',') goto err_free_param; } if (!i) goto err_free_param; param->tb[i + 1] = NULL; param->type.attr.rta_len = sizeof(param->type); param->type.attr.rta_type = CRYPTOA_TYPE; param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED; param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED; param->tb[0] = &param->type.attr; param->otype = larval->alg.cra_flags; param->omask = larval->mask; memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME); thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe"); if (IS_ERR(thread)) goto err_free_param; return NOTIFY_STOP; err_free_param: kfree(param); err_put_module: module_put(THIS_MODULE); err: return NOTIFY_OK; } static int cryptomgr_test(void *data) { struct crypto_test_param *param = data; u32 type = param->type; int err = 0; #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS goto skiptest; #endif if (type & CRYPTO_ALG_TESTED) goto skiptest; err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED); skiptest: crypto_alg_tested(param->driver, err); kfree(param); module_put_and_exit(0); } static int cryptomgr_schedule_test(struct crypto_alg *alg) { struct task_struct *thread; struct crypto_test_param *param; u32 type; if (!try_module_get(THIS_MODULE)) goto err; param = kzalloc(sizeof(*param), GFP_KERNEL); if (!param) goto err_put_module; memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver)); memcpy(param->alg, alg->cra_name, sizeof(param->alg)); type = alg->cra_flags; /* This piece of crap needs to disappear into per-type test hooks. */ if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) & CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) && ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize : alg->cra_ablkcipher.ivsize)) || (!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) && alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize)) type |= CRYPTO_ALG_TESTED; param->type = type; thread = kthread_run(cryptomgr_test, param, "cryptomgr_test"); if (IS_ERR(thread)) goto err_free_param; return NOTIFY_STOP; err_free_param: kfree(param); err_put_module: module_put(THIS_MODULE); err: return NOTIFY_OK; } static int cryptomgr_notify(struct notifier_block *this, unsigned long msg, void *data) { switch (msg) { case CRYPTO_MSG_ALG_REQUEST: return cryptomgr_schedule_probe(data); case CRYPTO_MSG_ALG_REGISTER: return cryptomgr_schedule_test(data); } return NOTIFY_DONE; } static struct notifier_block cryptomgr_notifier = { .notifier_call = cryptomgr_notify, }; static int __init cryptomgr_init(void) { return crypto_register_notifier(&cryptomgr_notifier); } static void __exit cryptomgr_exit(void) { int err = crypto_unregister_notifier(&cryptomgr_notifier); BUG_ON(err); } subsys_initcall(cryptomgr_init); module_exit(cryptomgr_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Crypto Algorithm Manager");


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