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[/] [test_project/] [trunk/] [linux_sd_driver/] [crypto/] [algapi.c] - Blame information for rev 81

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/*
 * Cryptographic API for algorithms (i.e., low-level API).
 *
 * 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 <linux/err.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
#include <linux/string.h>
 
#include "internal.h"
 
static LIST_HEAD(crypto_template_list);
 
void crypto_larval_error(const char *name, u32 type, u32 mask)
{
        struct crypto_alg *alg;
 
        down_read(&crypto_alg_sem);
        alg = __crypto_alg_lookup(name, type, mask);
        up_read(&crypto_alg_sem);
 
        if (alg) {
                if (crypto_is_larval(alg)) {
                        struct crypto_larval *larval = (void *)alg;
                        complete_all(&larval->completion);
                }
                crypto_mod_put(alg);
        }
}
EXPORT_SYMBOL_GPL(crypto_larval_error);
 
static inline int crypto_set_driver_name(struct crypto_alg *alg)
{
        static const char suffix[] = "-generic";
        char *driver_name = alg->cra_driver_name;
        int len;
 
        if (*driver_name)
                return 0;
 
        len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
        if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)
                return -ENAMETOOLONG;
 
        memcpy(driver_name + len, suffix, sizeof(suffix));
        return 0;
}
 
static int crypto_check_alg(struct crypto_alg *alg)
{
        if (alg->cra_alignmask & (alg->cra_alignmask + 1))
                return -EINVAL;
 
        if (alg->cra_blocksize > PAGE_SIZE / 8)
                return -EINVAL;
 
        if (alg->cra_priority < 0)
                return -EINVAL;
 
        return crypto_set_driver_name(alg);
}
 
static void crypto_destroy_instance(struct crypto_alg *alg)
{
        struct crypto_instance *inst = (void *)alg;
        struct crypto_template *tmpl = inst->tmpl;
 
        tmpl->free(inst);
        crypto_tmpl_put(tmpl);
}
 
static void crypto_remove_spawn(struct crypto_spawn *spawn,
                                struct list_head *list,
                                struct list_head *secondary_spawns)
{
        struct crypto_instance *inst = spawn->inst;
        struct crypto_template *tmpl = inst->tmpl;
 
        list_del_init(&spawn->list);
        spawn->alg = NULL;
 
        if (crypto_is_dead(&inst->alg))
                return;
 
        inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
        if (hlist_unhashed(&inst->list))
                return;
 
        if (!tmpl || !crypto_tmpl_get(tmpl))
                return;
 
        crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
        list_move(&inst->alg.cra_list, list);
        hlist_del(&inst->list);
        inst->alg.cra_destroy = crypto_destroy_instance;
 
        list_splice(&inst->alg.cra_users, secondary_spawns);
}
 
static void crypto_remove_spawns(struct list_head *spawns,
                                 struct list_head *list, u32 new_type)
{
        struct crypto_spawn *spawn, *n;
        LIST_HEAD(secondary_spawns);
 
        list_for_each_entry_safe(spawn, n, spawns, list) {
                if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
                        continue;
 
                crypto_remove_spawn(spawn, list, &secondary_spawns);
        }
 
        while (!list_empty(&secondary_spawns)) {
                list_for_each_entry_safe(spawn, n, &secondary_spawns, list)
                        crypto_remove_spawn(spawn, list, &secondary_spawns);
        }
}
 
static int __crypto_register_alg(struct crypto_alg *alg,
                                 struct list_head *list)
{
        struct crypto_alg *q;
        int ret = -EAGAIN;
 
        if (crypto_is_dead(alg))
                goto out;
 
        INIT_LIST_HEAD(&alg->cra_users);
 
        ret = -EEXIST;
 
        atomic_set(&alg->cra_refcnt, 1);
        list_for_each_entry(q, &crypto_alg_list, cra_list) {
                if (q == alg)
                        goto out;
 
                if (crypto_is_moribund(q))
                        continue;
 
                if (crypto_is_larval(q)) {
                        struct crypto_larval *larval = (void *)q;
 
                        /*
                         * Check to see if either our generic name or
                         * specific name can satisfy the name requested
                         * by the larval entry q.
                         */
                        if (strcmp(alg->cra_name, q->cra_name) &&
                            strcmp(alg->cra_driver_name, q->cra_name))
                                continue;
 
                        if (larval->adult)
                                continue;
                        if ((q->cra_flags ^ alg->cra_flags) & larval->mask)
                                continue;
                        if (!crypto_mod_get(alg))
                                continue;
 
                        larval->adult = alg;
                        complete_all(&larval->completion);
                        continue;
                }
 
                if (strcmp(alg->cra_name, q->cra_name))
                        continue;
 
                if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&
                    q->cra_priority > alg->cra_priority)
                        continue;
 
                crypto_remove_spawns(&q->cra_users, list, alg->cra_flags);
        }
 
        list_add(&alg->cra_list, &crypto_alg_list);
 
        crypto_notify(CRYPTO_MSG_ALG_REGISTER, alg);
        ret = 0;
 
out:
        return ret;
}
 
static void crypto_remove_final(struct list_head *list)
{
        struct crypto_alg *alg;
        struct crypto_alg *n;
 
        list_for_each_entry_safe(alg, n, list, cra_list) {
                list_del_init(&alg->cra_list);
                crypto_alg_put(alg);
        }
}
 
int crypto_register_alg(struct crypto_alg *alg)
{
        LIST_HEAD(list);
        int err;
 
        err = crypto_check_alg(alg);
        if (err)
                return err;
 
        down_write(&crypto_alg_sem);
        err = __crypto_register_alg(alg, &list);
        up_write(&crypto_alg_sem);
 
        crypto_remove_final(&list);
        return err;
}
EXPORT_SYMBOL_GPL(crypto_register_alg);
 
static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
{
        if (unlikely(list_empty(&alg->cra_list)))
                return -ENOENT;
 
        alg->cra_flags |= CRYPTO_ALG_DEAD;
 
        crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);
        list_del_init(&alg->cra_list);
        crypto_remove_spawns(&alg->cra_users, list, alg->cra_flags);
 
        return 0;
}
 
int crypto_unregister_alg(struct crypto_alg *alg)
{
        int ret;
        LIST_HEAD(list);
 
        down_write(&crypto_alg_sem);
        ret = crypto_remove_alg(alg, &list);
        up_write(&crypto_alg_sem);
 
        if (ret)
                return ret;
 
        BUG_ON(atomic_read(&alg->cra_refcnt) != 1);
        if (alg->cra_destroy)
                alg->cra_destroy(alg);
 
        crypto_remove_final(&list);
        return 0;
}
EXPORT_SYMBOL_GPL(crypto_unregister_alg);
 
int crypto_register_template(struct crypto_template *tmpl)
{
        struct crypto_template *q;
        int err = -EEXIST;
 
        down_write(&crypto_alg_sem);
 
        list_for_each_entry(q, &crypto_template_list, list) {
                if (q == tmpl)
                        goto out;
        }
 
        list_add(&tmpl->list, &crypto_template_list);
        crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl);
        err = 0;
out:
        up_write(&crypto_alg_sem);
        return err;
}
EXPORT_SYMBOL_GPL(crypto_register_template);
 
void crypto_unregister_template(struct crypto_template *tmpl)
{
        struct crypto_instance *inst;
        struct hlist_node *p, *n;
        struct hlist_head *list;
        LIST_HEAD(users);
 
        down_write(&crypto_alg_sem);
 
        BUG_ON(list_empty(&tmpl->list));
        list_del_init(&tmpl->list);
 
        list = &tmpl->instances;
        hlist_for_each_entry(inst, p, list, list) {
                int err = crypto_remove_alg(&inst->alg, &users);
                BUG_ON(err);
        }
 
        crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl);
 
        up_write(&crypto_alg_sem);
 
        hlist_for_each_entry_safe(inst, p, n, list, list) {
                BUG_ON(atomic_read(&inst->alg.cra_refcnt) != 1);
                tmpl->free(inst);
        }
        crypto_remove_final(&users);
}
EXPORT_SYMBOL_GPL(crypto_unregister_template);
 
static struct crypto_template *__crypto_lookup_template(const char *name)
{
        struct crypto_template *q, *tmpl = NULL;
 
        down_read(&crypto_alg_sem);
        list_for_each_entry(q, &crypto_template_list, list) {
                if (strcmp(q->name, name))
                        continue;
                if (unlikely(!crypto_tmpl_get(q)))
                        continue;
 
                tmpl = q;
                break;
        }
        up_read(&crypto_alg_sem);
 
        return tmpl;
}
 
struct crypto_template *crypto_lookup_template(const char *name)
{
        return try_then_request_module(__crypto_lookup_template(name), name);
}
EXPORT_SYMBOL_GPL(crypto_lookup_template);
 
int crypto_register_instance(struct crypto_template *tmpl,
                             struct crypto_instance *inst)
{
        LIST_HEAD(list);
        int err = -EINVAL;
 
        err = crypto_check_alg(&inst->alg);
        if (err)
                goto err;
 
        inst->alg.cra_module = tmpl->module;
 
        down_write(&crypto_alg_sem);
 
        err = __crypto_register_alg(&inst->alg, &list);
        if (err)
                goto unlock;
 
        hlist_add_head(&inst->list, &tmpl->instances);
        inst->tmpl = tmpl;
 
unlock:
        up_write(&crypto_alg_sem);
 
        crypto_remove_final(&list);
 
err:
        return err;
}
EXPORT_SYMBOL_GPL(crypto_register_instance);
 
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
                      struct crypto_instance *inst, u32 mask)
{
        int err = -EAGAIN;
 
        spawn->inst = inst;
        spawn->mask = mask;
 
        down_write(&crypto_alg_sem);
        if (!crypto_is_moribund(alg)) {
                list_add(&spawn->list, &alg->cra_users);
                spawn->alg = alg;
                err = 0;
        }
        up_write(&crypto_alg_sem);
 
        return err;
}
EXPORT_SYMBOL_GPL(crypto_init_spawn);
 
void crypto_drop_spawn(struct crypto_spawn *spawn)
{
        down_write(&crypto_alg_sem);
        list_del(&spawn->list);
        up_write(&crypto_alg_sem);
}
EXPORT_SYMBOL_GPL(crypto_drop_spawn);
 
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
                                    u32 mask)
{
        struct crypto_alg *alg;
        struct crypto_alg *alg2;
        struct crypto_tfm *tfm;
 
        down_read(&crypto_alg_sem);
        alg = spawn->alg;
        alg2 = alg;
        if (alg2)
                alg2 = crypto_mod_get(alg2);
        up_read(&crypto_alg_sem);
 
        if (!alg2) {
                if (alg)
                        crypto_shoot_alg(alg);
                return ERR_PTR(-EAGAIN);
        }
 
        tfm = ERR_PTR(-EINVAL);
        if (unlikely((alg->cra_flags ^ type) & mask))
                goto out_put_alg;
 
        tfm = __crypto_alloc_tfm(alg, type, mask);
        if (IS_ERR(tfm))
                goto out_put_alg;
 
        return tfm;
 
out_put_alg:
        crypto_mod_put(alg);
        return tfm;
}
EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
 
int crypto_register_notifier(struct notifier_block *nb)
{
        return blocking_notifier_chain_register(&crypto_chain, nb);
}
EXPORT_SYMBOL_GPL(crypto_register_notifier);
 
int crypto_unregister_notifier(struct notifier_block *nb)
{
        return blocking_notifier_chain_unregister(&crypto_chain, nb);
}
EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
 
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
{
        struct rtattr *rta = tb[0];
        struct crypto_attr_type *algt;
 
        if (!rta)
                return ERR_PTR(-ENOENT);
        if (RTA_PAYLOAD(rta) < sizeof(*algt))
                return ERR_PTR(-EINVAL);
        if (rta->rta_type != CRYPTOA_TYPE)
                return ERR_PTR(-EINVAL);
 
        algt = RTA_DATA(rta);
 
        return algt;
}
EXPORT_SYMBOL_GPL(crypto_get_attr_type);
 
int crypto_check_attr_type(struct rtattr **tb, u32 type)
{
        struct crypto_attr_type *algt;
 
        algt = crypto_get_attr_type(tb);
        if (IS_ERR(algt))
                return PTR_ERR(algt);
 
        if ((algt->type ^ type) & algt->mask)
                return -EINVAL;
 
        return 0;
}
EXPORT_SYMBOL_GPL(crypto_check_attr_type);
 
struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask)
{
        struct crypto_attr_alg *alga;
 
        if (!rta)
                return ERR_PTR(-ENOENT);
        if (RTA_PAYLOAD(rta) < sizeof(*alga))
                return ERR_PTR(-EINVAL);
        if (rta->rta_type != CRYPTOA_ALG)
                return ERR_PTR(-EINVAL);
 
        alga = RTA_DATA(rta);
        alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
 
        return crypto_alg_mod_lookup(alga->name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_attr_alg);
 
int crypto_attr_u32(struct rtattr *rta, u32 *num)
{
        struct crypto_attr_u32 *nu32;
 
        if (!rta)
                return -ENOENT;
        if (RTA_PAYLOAD(rta) < sizeof(*nu32))
                return -EINVAL;
        if (rta->rta_type != CRYPTOA_U32)
                return -EINVAL;
 
        nu32 = RTA_DATA(rta);
        *num = nu32->num;
 
        return 0;
}
EXPORT_SYMBOL_GPL(crypto_attr_u32);
 
struct crypto_instance *crypto_alloc_instance(const char *name,
                                              struct crypto_alg *alg)
{
        struct crypto_instance *inst;
        struct crypto_spawn *spawn;
        int err;
 
        inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
        if (!inst)
                return ERR_PTR(-ENOMEM);
 
        err = -ENAMETOOLONG;
        if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name,
                     alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
                goto err_free_inst;
 
        if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
                     name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
                goto err_free_inst;
 
        spawn = crypto_instance_ctx(inst);
        err = crypto_init_spawn(spawn, alg, inst,
                                CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
 
        if (err)
                goto err_free_inst;
 
        return inst;
 
err_free_inst:
        kfree(inst);
        return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(crypto_alloc_instance);
 
void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
{
        INIT_LIST_HEAD(&queue->list);
        queue->backlog = &queue->list;
        queue->qlen = 0;
        queue->max_qlen = max_qlen;
}
EXPORT_SYMBOL_GPL(crypto_init_queue);
 
int crypto_enqueue_request(struct crypto_queue *queue,
                           struct crypto_async_request *request)
{
        int err = -EINPROGRESS;
 
        if (unlikely(queue->qlen >= queue->max_qlen)) {
                err = -EBUSY;
                if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
                        goto out;
                if (queue->backlog == &queue->list)
                        queue->backlog = &request->list;
        }
 
        queue->qlen++;
        list_add_tail(&request->list, &queue->list);
 
out:
        return err;
}
EXPORT_SYMBOL_GPL(crypto_enqueue_request);
 
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
{
        struct list_head *request;
 
        if (unlikely(!queue->qlen))
                return NULL;
 
        queue->qlen--;
 
        if (queue->backlog != &queue->list)
                queue->backlog = queue->backlog->next;
 
        request = queue->list.next;
        list_del(request);
 
        return list_entry(request, struct crypto_async_request, list);
}
EXPORT_SYMBOL_GPL(crypto_dequeue_request);
 
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm)
{
        struct crypto_async_request *req;
 
        list_for_each_entry(req, &queue->list, list) {
                if (req->tfm == tfm)
                        return 1;
        }
 
        return 0;
}
EXPORT_SYMBOL_GPL(crypto_tfm_in_queue);
 
static int __init crypto_algapi_init(void)
{
        crypto_init_proc();
        return 0;
}
 
static void __exit crypto_algapi_exit(void)
{
        crypto_exit_proc();
}
 
module_init(crypto_algapi_init);
module_exit(crypto_algapi_exit);
 
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cryptographic algorithms API");

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[/] [test_project/] [trunk/] [linux_sd_driver/] [crypto/] [algapi.c] - Blame information for rev 81

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* Cryptographic API for algorithms (i.e., low-level API).`
3			`*`
4			`* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>`
5			`*`
6			`* This program is free software; you can redistribute it and/or modify it`
7			`* under the terms of the GNU General Public License as published by the Free`
8			`* Software Foundation; either version 2 of the License, or (at your option)`
9			`* any later version.`
10			`*`
11			`*/`
12
13			`#include <linux/err.h>`
14			`#include <linux/errno.h>`
15			`#include <linux/init.h>`
16			`#include <linux/kernel.h>`
17			`#include <linux/list.h>`
18			`#include <linux/module.h>`
19			`#include <linux/rtnetlink.h>`
20			`#include <linux/string.h>`
21
22			`#include "internal.h"`
23
24			`static LIST_HEAD(crypto_template_list);`
25
26			`void crypto_larval_error(const char *name, u32 type, u32 mask)`
27			`{`
28			`struct crypto_alg *alg;`
29
30			`down_read(&crypto_alg_sem);`
31			`alg = __crypto_alg_lookup(name, type, mask);`
32			`up_read(&crypto_alg_sem);`
33
34			`if (alg) {`
35			`if (crypto_is_larval(alg)) {`
36			`struct crypto_larval larval = (void )alg;`
37			`complete_all(&larval->completion);`
38			`}`
39			`crypto_mod_put(alg);`
40			`}`
41			`}`
42			`EXPORT_SYMBOL_GPL(crypto_larval_error);`
43
44			`static inline int crypto_set_driver_name(struct crypto_alg *alg)`
45			`{`
46			`static const char suffix[] = "-generic";`
47			`char *driver_name = alg->cra_driver_name;`
48			`int len;`
49
50			`if (*driver_name)`
51			`return 0;`
52
53			`len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);`
54			`if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)`
55			`return -ENAMETOOLONG;`
56
57			`memcpy(driver_name + len, suffix, sizeof(suffix));`
58			`return 0;`
59			`}`
60
61			`static int crypto_check_alg(struct crypto_alg *alg)`
62			`{`
63			`if (alg->cra_alignmask & (alg->cra_alignmask + 1))`
64			`return -EINVAL;`
65
66			`if (alg->cra_blocksize > PAGE_SIZE / 8)`
67			`return -EINVAL;`
68
69			`if (alg->cra_priority < 0)`
70			`return -EINVAL;`
71
72			`return crypto_set_driver_name(alg);`
73			`}`
74
75			`static void crypto_destroy_instance(struct crypto_alg *alg)`
76			`{`
77			`struct crypto_instance inst = (void )alg;`
78			`struct crypto_template *tmpl = inst->tmpl;`
79
80			`tmpl->free(inst);`
81			`crypto_tmpl_put(tmpl);`
82			`}`
83
84			`static void crypto_remove_spawn(struct crypto_spawn *spawn,`
85			`struct list_head *list,`
86			`struct list_head *secondary_spawns)`
87			`{`
88			`struct crypto_instance *inst = spawn->inst;`
89			`struct crypto_template *tmpl = inst->tmpl;`
90
91			`list_del_init(&spawn->list);`
92			`spawn->alg = NULL;`
93
94			`if (crypto_is_dead(&inst->alg))`
95			`return;`
96
97			`inst->alg.cra_flags \|= CRYPTO_ALG_DEAD;`
98			`if (hlist_unhashed(&inst->list))`
99			`return;`
100
101			`if (!tmpl \|\| !crypto_tmpl_get(tmpl))`
102			`return;`
103
104			`crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);`
105			`list_move(&inst->alg.cra_list, list);`
106			`hlist_del(&inst->list);`
107			`inst->alg.cra_destroy = crypto_destroy_instance;`
108
109			`list_splice(&inst->alg.cra_users, secondary_spawns);`
110			`}`
111
112			`static void crypto_remove_spawns(struct list_head *spawns,`
113			`struct list_head *list, u32 new_type)`
114			`{`
115			`struct crypto_spawn spawn, n;`
116			`LIST_HEAD(secondary_spawns);`
117
118			`list_for_each_entry_safe(spawn, n, spawns, list) {`
119			`if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)`
120			`continue;`
121
122			`crypto_remove_spawn(spawn, list, &secondary_spawns);`
123			`}`
124
125			`while (!list_empty(&secondary_spawns)) {`
126			`list_for_each_entry_safe(spawn, n, &secondary_spawns, list)`
127			`crypto_remove_spawn(spawn, list, &secondary_spawns);`
128			`}`
129			`}`
130
131			`static int __crypto_register_alg(struct crypto_alg *alg,`
132			`struct list_head *list)`
133			`{`
134			`struct crypto_alg *q;`
135			`int ret = -EAGAIN;`
136
137			`if (crypto_is_dead(alg))`
138			`goto out;`
139
140			`INIT_LIST_HEAD(&alg->cra_users);`
141
142			`ret = -EEXIST;`
143
144			`atomic_set(&alg->cra_refcnt, 1);`
145			`list_for_each_entry(q, &crypto_alg_list, cra_list) {`
146			`if (q == alg)`
147			`goto out;`
148
149			`if (crypto_is_moribund(q))`
150			`continue;`
151
152			`if (crypto_is_larval(q)) {`
153			`struct crypto_larval larval = (void )q;`
154
155			`/*`
156			`* Check to see if either our generic name or`
157			`* specific name can satisfy the name requested`
158			`* by the larval entry q.`
159			`*/`
160			`if (strcmp(alg->cra_name, q->cra_name) &&`
161			`strcmp(alg->cra_driver_name, q->cra_name))`
162			`continue;`
163
164			`if (larval->adult)`
165			`continue;`
166			`if ((q->cra_flags ^ alg->cra_flags) & larval->mask)`
167			`continue;`
168			`if (!crypto_mod_get(alg))`
169			`continue;`
170
171			`larval->adult = alg;`
172			`complete_all(&larval->completion);`
173			`continue;`
174			`}`
175
176			`if (strcmp(alg->cra_name, q->cra_name))`
177			`continue;`
178
179			`if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&`
180			`q->cra_priority > alg->cra_priority)`
181			`continue;`
182
183			`crypto_remove_spawns(&q->cra_users, list, alg->cra_flags);`
184			`}`
185
186			`list_add(&alg->cra_list, &crypto_alg_list);`
187
188			`crypto_notify(CRYPTO_MSG_ALG_REGISTER, alg);`
189			`ret = 0;`
190
191			`out:`
192			`return ret;`
193			`}`
194
195			`static void crypto_remove_final(struct list_head *list)`
196			`{`
197			`struct crypto_alg *alg;`
198			`struct crypto_alg *n;`
199
200			`list_for_each_entry_safe(alg, n, list, cra_list) {`
201			`list_del_init(&alg->cra_list);`
202			`crypto_alg_put(alg);`
203			`}`
204			`}`
205
206			`int crypto_register_alg(struct crypto_alg *alg)`
207			`{`
208			`LIST_HEAD(list);`
209			`int err;`
210
211			`err = crypto_check_alg(alg);`
212			`if (err)`
213			`return err;`
214
215			`down_write(&crypto_alg_sem);`
216			`err = __crypto_register_alg(alg, &list);`
217			`up_write(&crypto_alg_sem);`
218
219			`crypto_remove_final(&list);`
220			`return err;`
221			`}`
222			`EXPORT_SYMBOL_GPL(crypto_register_alg);`
223
224			`static int crypto_remove_alg(struct crypto_alg alg, struct list_head list)`
225			`{`
226			`if (unlikely(list_empty(&alg->cra_list)))`
227			`return -ENOENT;`
228
229			`alg->cra_flags \|= CRYPTO_ALG_DEAD;`
230
231			`crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);`
232			`list_del_init(&alg->cra_list);`
233			`crypto_remove_spawns(&alg->cra_users, list, alg->cra_flags);`
234
235			`return 0;`
236			`}`
237
238			`int crypto_unregister_alg(struct crypto_alg *alg)`
239			`{`
240			`int ret;`
241			`LIST_HEAD(list);`
242
243			`down_write(&crypto_alg_sem);`
244			`ret = crypto_remove_alg(alg, &list);`
245			`up_write(&crypto_alg_sem);`
246
247			`if (ret)`
248			`return ret;`
249
250			`BUG_ON(atomic_read(&alg->cra_refcnt) != 1);`
251			`if (alg->cra_destroy)`
252			`alg->cra_destroy(alg);`
253
254			`crypto_remove_final(&list);`
255			`return 0;`
256			`}`
257			`EXPORT_SYMBOL_GPL(crypto_unregister_alg);`
258
259			`int crypto_register_template(struct crypto_template *tmpl)`
260			`{`
261			`struct crypto_template *q;`
262			`int err = -EEXIST;`
263
264			`down_write(&crypto_alg_sem);`
265
266			`list_for_each_entry(q, &crypto_template_list, list) {`
267			`if (q == tmpl)`
268			`goto out;`
269			`}`
270
271			`list_add(&tmpl->list, &crypto_template_list);`
272			`crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl);`
273			`err = 0;`
274			`out:`
275			`up_write(&crypto_alg_sem);`
276			`return err;`
277			`}`
278			`EXPORT_SYMBOL_GPL(crypto_register_template);`
279
280			`void crypto_unregister_template(struct crypto_template *tmpl)`
281			`{`
282			`struct crypto_instance *inst;`
283			`struct hlist_node p, n;`
284			`struct hlist_head *list;`
285			`LIST_HEAD(users);`
286
287			`down_write(&crypto_alg_sem);`
288
289			`BUG_ON(list_empty(&tmpl->list));`
290			`list_del_init(&tmpl->list);`
291
292			`list = &tmpl->instances;`
293			`hlist_for_each_entry(inst, p, list, list) {`
294			`int err = crypto_remove_alg(&inst->alg, &users);`
295			`BUG_ON(err);`
296			`}`
297
298			`crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl);`
299
300			`up_write(&crypto_alg_sem);`
301
302			`hlist_for_each_entry_safe(inst, p, n, list, list) {`
303			`BUG_ON(atomic_read(&inst->alg.cra_refcnt) != 1);`
304			`tmpl->free(inst);`
305			`}`
306			`crypto_remove_final(&users);`
307			`}`
308			`EXPORT_SYMBOL_GPL(crypto_unregister_template);`
309
310			`static struct crypto_template __crypto_lookup_template(const char name)`
311			`{`
312			`struct crypto_template q, tmpl = NULL;`
313
314			`down_read(&crypto_alg_sem);`
315			`list_for_each_entry(q, &crypto_template_list, list) {`
316			`if (strcmp(q->name, name))`
317			`continue;`
318			`if (unlikely(!crypto_tmpl_get(q)))`
319			`continue;`
320
321			`tmpl = q;`
322			`break;`
323			`}`
324			`up_read(&crypto_alg_sem);`
325
326			`return tmpl;`
327			`}`
328
329			`struct crypto_template crypto_lookup_template(const char name)`
330			`{`
331			`return try_then_request_module(__crypto_lookup_template(name), name);`
332			`}`
333			`EXPORT_SYMBOL_GPL(crypto_lookup_template);`
334
335			`int crypto_register_instance(struct crypto_template *tmpl,`
336			`struct crypto_instance *inst)`
337			`{`
338			`LIST_HEAD(list);`
339			`int err = -EINVAL;`
340
341			`err = crypto_check_alg(&inst->alg);`
342			`if (err)`
343			`goto err;`
344
345			`inst->alg.cra_module = tmpl->module;`
346
347			`down_write(&crypto_alg_sem);`
348
349			`err = __crypto_register_alg(&inst->alg, &list);`
350			`if (err)`
351			`goto unlock;`
352
353			`hlist_add_head(&inst->list, &tmpl->instances);`
354			`inst->tmpl = tmpl;`
355
356			`unlock:`
357			`up_write(&crypto_alg_sem);`
358
359			`crypto_remove_final(&list);`
360
361			`err:`
362			`return err;`
363			`}`
364			`EXPORT_SYMBOL_GPL(crypto_register_instance);`
365
366			`int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,`
367			`struct crypto_instance *inst, u32 mask)`
368			`{`
369			`int err = -EAGAIN;`
370
371			`spawn->inst = inst;`
372			`spawn->mask = mask;`
373
374			`down_write(&crypto_alg_sem);`
375			`if (!crypto_is_moribund(alg)) {`
376			`list_add(&spawn->list, &alg->cra_users);`
377			`spawn->alg = alg;`
378			`err = 0;`
379			`}`
380			`up_write(&crypto_alg_sem);`
381
382			`return err;`
383			`}`
384			`EXPORT_SYMBOL_GPL(crypto_init_spawn);`
385
386			`void crypto_drop_spawn(struct crypto_spawn *spawn)`
387			`{`
388			`down_write(&crypto_alg_sem);`
389			`list_del(&spawn->list);`
390			`up_write(&crypto_alg_sem);`
391			`}`
392			`EXPORT_SYMBOL_GPL(crypto_drop_spawn);`
393
394			`struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,`
395			`u32 mask)`
396			`{`
397			`struct crypto_alg *alg;`
398			`struct crypto_alg *alg2;`
399			`struct crypto_tfm *tfm;`
400
401			`down_read(&crypto_alg_sem);`
402			`alg = spawn->alg;`
403			`alg2 = alg;`
404			`if (alg2)`
405			`alg2 = crypto_mod_get(alg2);`
406			`up_read(&crypto_alg_sem);`
407
408			`if (!alg2) {`
409			`if (alg)`
410			`crypto_shoot_alg(alg);`
411			`return ERR_PTR(-EAGAIN);`
412			`}`
413
414			`tfm = ERR_PTR(-EINVAL);`
415			`if (unlikely((alg->cra_flags ^ type) & mask))`
416			`goto out_put_alg;`
417
418			`tfm = __crypto_alloc_tfm(alg, type, mask);`
419			`if (IS_ERR(tfm))`
420			`goto out_put_alg;`
421
422			`return tfm;`
423
424			`out_put_alg:`
425			`crypto_mod_put(alg);`
426			`return tfm;`
427			`}`
428			`EXPORT_SYMBOL_GPL(crypto_spawn_tfm);`
429
430			`int crypto_register_notifier(struct notifier_block *nb)`
431			`{`
432			`return blocking_notifier_chain_register(&crypto_chain, nb);`
433			`}`
434			`EXPORT_SYMBOL_GPL(crypto_register_notifier);`
435
436			`int crypto_unregister_notifier(struct notifier_block *nb)`
437			`{`
438			`return blocking_notifier_chain_unregister(&crypto_chain, nb);`
439			`}`
440			`EXPORT_SYMBOL_GPL(crypto_unregister_notifier);`
441
442			`struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb)`
443			`{`
444			`struct rtattr *rta = tb[0];`
445			`struct crypto_attr_type *algt;`
446
447			`if (!rta)`
448			`return ERR_PTR(-ENOENT);`
449			`if (RTA_PAYLOAD(rta) < sizeof(*algt))`
450			`return ERR_PTR(-EINVAL);`
451			`if (rta->rta_type != CRYPTOA_TYPE)`
452			`return ERR_PTR(-EINVAL);`
453
454			`algt = RTA_DATA(rta);`
455
456			`return algt;`
457			`}`
458			`EXPORT_SYMBOL_GPL(crypto_get_attr_type);`
459
460			`int crypto_check_attr_type(struct rtattr **tb, u32 type)`
461			`{`
462			`struct crypto_attr_type *algt;`
463
464			`algt = crypto_get_attr_type(tb);`
465			`if (IS_ERR(algt))`
466			`return PTR_ERR(algt);`
467
468			`if ((algt->type ^ type) & algt->mask)`
469			`return -EINVAL;`
470
471			`return 0;`
472			`}`
473			`EXPORT_SYMBOL_GPL(crypto_check_attr_type);`
474
475			`struct crypto_alg crypto_attr_alg(struct rtattr rta, u32 type, u32 mask)`
476			`{`
477			`struct crypto_attr_alg *alga;`
478
479			`if (!rta)`
480			`return ERR_PTR(-ENOENT);`
481			`if (RTA_PAYLOAD(rta) < sizeof(*alga))`
482			`return ERR_PTR(-EINVAL);`
483			`if (rta->rta_type != CRYPTOA_ALG)`
484			`return ERR_PTR(-EINVAL);`
485
486			`alga = RTA_DATA(rta);`
487			`alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;`
488
489			`return crypto_alg_mod_lookup(alga->name, type, mask);`
490			`}`
491			`EXPORT_SYMBOL_GPL(crypto_attr_alg);`
492
493			`int crypto_attr_u32(struct rtattr rta, u32 num)`
494			`{`
495			`struct crypto_attr_u32 *nu32;`
496
497			`if (!rta)`
498			`return -ENOENT;`
499			`if (RTA_PAYLOAD(rta) < sizeof(*nu32))`
500			`return -EINVAL;`
501			`if (rta->rta_type != CRYPTOA_U32)`
502			`return -EINVAL;`
503
504			`nu32 = RTA_DATA(rta);`
505			`*num = nu32->num;`
506
507			`return 0;`
508			`}`
509			`EXPORT_SYMBOL_GPL(crypto_attr_u32);`
510
511			`struct crypto_instance crypto_alloc_instance(const char name,`
512			`struct crypto_alg *alg)`
513			`{`
514			`struct crypto_instance *inst;`
515			`struct crypto_spawn *spawn;`
516			`int err;`
517
518			`inst = kzalloc(sizeof(inst) + sizeof(spawn), GFP_KERNEL);`
519			`if (!inst)`
520			`return ERR_PTR(-ENOMEM);`
521
522			`err = -ENAMETOOLONG;`
523			`if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name,`
524			`alg->cra_name) >= CRYPTO_MAX_ALG_NAME)`
525			`goto err_free_inst;`
526
527			`if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",`
528			`name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)`
529			`goto err_free_inst;`
530
531			`spawn = crypto_instance_ctx(inst);`
532			`err = crypto_init_spawn(spawn, alg, inst,`
533			`CRYPTO_ALG_TYPE_MASK \| CRYPTO_ALG_ASYNC);`
534
535			`if (err)`
536			`goto err_free_inst;`
537
538			`return inst;`
539
540			`err_free_inst:`
541			`kfree(inst);`
542			`return ERR_PTR(err);`
543			`}`
544			`EXPORT_SYMBOL_GPL(crypto_alloc_instance);`
545
546			`void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)`
547			`{`
548			`INIT_LIST_HEAD(&queue->list);`
549			`queue->backlog = &queue->list;`
550			`queue->qlen = 0;`
551			`queue->max_qlen = max_qlen;`
552			`}`
553			`EXPORT_SYMBOL_GPL(crypto_init_queue);`
554
555			`int crypto_enqueue_request(struct crypto_queue *queue,`
556			`struct crypto_async_request *request)`
557			`{`
558			`int err = -EINPROGRESS;`
559
560			`if (unlikely(queue->qlen >= queue->max_qlen)) {`
561			`err = -EBUSY;`
562			`if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))`
563			`goto out;`
564			`if (queue->backlog == &queue->list)`
565			`queue->backlog = &request->list;`
566			`}`
567
568			`queue->qlen++;`
569			`list_add_tail(&request->list, &queue->list);`
570
571			`out:`
572			`return err;`
573			`}`
574			`EXPORT_SYMBOL_GPL(crypto_enqueue_request);`
575
576			`struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue)`
577			`{`
578			`struct list_head *request;`
579
580			`if (unlikely(!queue->qlen))`
581			`return NULL;`
582
583			`queue->qlen--;`
584
585			`if (queue->backlog != &queue->list)`
586			`queue->backlog = queue->backlog->next;`
587
588			`request = queue->list.next;`
589			`list_del(request);`
590
591			`return list_entry(request, struct crypto_async_request, list);`
592			`}`
593			`EXPORT_SYMBOL_GPL(crypto_dequeue_request);`
594
595			`int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm)`
596			`{`
597			`struct crypto_async_request *req;`
598
599			`list_for_each_entry(req, &queue->list, list) {`
600			`if (req->tfm == tfm)`
601			`return 1;`
602			`}`
603
604			`return 0;`
605			`}`
606			`EXPORT_SYMBOL_GPL(crypto_tfm_in_queue);`
607
608			`static int __init crypto_algapi_init(void)`
609			`{`
610			`crypto_init_proc();`
611			`return 0;`
612			`}`
613
614			`static void __exit crypto_algapi_exit(void)`
615			`{`
616			`crypto_exit_proc();`
617			`}`
618
619			`module_init(crypto_algapi_init);`
620			`module_exit(crypto_algapi_exit);`
621
622			`MODULE_LICENSE("GPL");`
623			`MODULE_DESCRIPTION("Cryptographic algorithms API");`