diff options
Diffstat (limited to 'drivers/staging/pohmelfs/crypto.c')
| -rw-r--r-- | drivers/staging/pohmelfs/crypto.c | 878 |
1 files changed, 0 insertions, 878 deletions
diff --git a/drivers/staging/pohmelfs/crypto.c b/drivers/staging/pohmelfs/crypto.c deleted file mode 100644 index ad92771dce5..00000000000 --- a/drivers/staging/pohmelfs/crypto.c +++ /dev/null @@ -1,878 +0,0 @@ -/* - * 2007+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net> - * All rights reserved. - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/crypto.h> -#include <linux/highmem.h> -#include <linux/kthread.h> -#include <linux/pagemap.h> -#include <linux/scatterlist.h> -#include <linux/slab.h> - -#include "netfs.h" - -static struct crypto_hash *pohmelfs_init_hash(struct pohmelfs_sb *psb) -{ - int err; - struct crypto_hash *hash; - - hash = crypto_alloc_hash(psb->hash_string, 0, CRYPTO_ALG_ASYNC); - if (IS_ERR(hash)) { - err = PTR_ERR(hash); - dprintk("%s: idx: %u: failed to allocate hash '%s', err: %d.\n", - __func__, psb->idx, psb->hash_string, err); - goto err_out_exit; - } - - psb->crypto_attached_size = crypto_hash_digestsize(hash); - - if (!psb->hash_keysize) - return hash; - - err = crypto_hash_setkey(hash, psb->hash_key, psb->hash_keysize); - if (err) { - dprintk("%s: idx: %u: failed to set key for hash '%s', err: %d.\n", - __func__, psb->idx, psb->hash_string, err); - goto err_out_free; - } - - return hash; - -err_out_free: - crypto_free_hash(hash); -err_out_exit: - return ERR_PTR(err); -} - -static struct crypto_ablkcipher *pohmelfs_init_cipher(struct pohmelfs_sb *psb) -{ - int err = -EINVAL; - struct crypto_ablkcipher *cipher; - - if (!psb->cipher_keysize) - goto err_out_exit; - - cipher = crypto_alloc_ablkcipher(psb->cipher_string, 0, 0); - if (IS_ERR(cipher)) { - err = PTR_ERR(cipher); - dprintk("%s: idx: %u: failed to allocate cipher '%s', err: %d.\n", - __func__, psb->idx, psb->cipher_string, err); - goto err_out_exit; - } - - crypto_ablkcipher_clear_flags(cipher, ~0); - - err = crypto_ablkcipher_setkey(cipher, psb->cipher_key, psb->cipher_keysize); - if (err) { - dprintk("%s: idx: %u: failed to set key for cipher '%s', err: %d.\n", - __func__, psb->idx, psb->cipher_string, err); - goto err_out_free; - } - - return cipher; - -err_out_free: - crypto_free_ablkcipher(cipher); -err_out_exit: - return ERR_PTR(err); -} - -int pohmelfs_crypto_engine_init(struct pohmelfs_crypto_engine *e, struct pohmelfs_sb *psb) -{ - int err; - - e->page_num = 0; - - e->size = PAGE_SIZE; - e->data = kmalloc(e->size, GFP_KERNEL); - if (!e->data) { - err = -ENOMEM; - goto err_out_exit; - } - - if (psb->hash_string) { - e->hash = pohmelfs_init_hash(psb); - if (IS_ERR(e->hash)) { - err = PTR_ERR(e->hash); - e->hash = NULL; - goto err_out_free; - } - } - - if (psb->cipher_string) { - e->cipher = pohmelfs_init_cipher(psb); - if (IS_ERR(e->cipher)) { - err = PTR_ERR(e->cipher); - e->cipher = NULL; - goto err_out_free_hash; - } - } - - return 0; - -err_out_free_hash: - crypto_free_hash(e->hash); -err_out_free: - kfree(e->data); -err_out_exit: - return err; -} - -void pohmelfs_crypto_engine_exit(struct pohmelfs_crypto_engine *e) -{ - crypto_free_hash(e->hash); - crypto_free_ablkcipher(e->cipher); - kfree(e->data); -} - -static void pohmelfs_crypto_complete(struct crypto_async_request *req, int err) -{ - struct pohmelfs_crypto_completion *c = req->data; - - if (err == -EINPROGRESS) - return; - - dprintk("%s: req: %p, err: %d.\n", __func__, req, err); - c->error = err; - complete(&c->complete); -} - -static int pohmelfs_crypto_process(struct ablkcipher_request *req, - struct scatterlist *sg_dst, struct scatterlist *sg_src, - void *iv, int enc, unsigned long timeout) -{ - struct pohmelfs_crypto_completion complete; - int err; - - init_completion(&complete.complete); - complete.error = -EINPROGRESS; - - ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, - pohmelfs_crypto_complete, &complete); - - ablkcipher_request_set_crypt(req, sg_src, sg_dst, sg_src->length, iv); - - if (enc) - err = crypto_ablkcipher_encrypt(req); - else - err = crypto_ablkcipher_decrypt(req); - - switch (err) { - case -EINPROGRESS: - case -EBUSY: - err = wait_for_completion_interruptible_timeout(&complete.complete, - timeout); - if (!err) - err = -ETIMEDOUT; - else if (err > 0) - err = complete.error; - break; - default: - break; - } - - return err; -} - -int pohmelfs_crypto_process_input_data(struct pohmelfs_crypto_engine *e, u64 cmd_iv, - void *data, struct page *page, unsigned int size) -{ - int err; - struct scatterlist sg; - - if (!e->cipher && !e->hash) - return 0; - - dprintk("%s: eng: %p, iv: %llx, data: %p, page: %p/%lu, size: %u.\n", - __func__, e, cmd_iv, data, page, (page) ? page->index : 0, size); - - if (data) { - sg_init_one(&sg, data, size); - } else { - sg_init_table(&sg, 1); - sg_set_page(&sg, page, size, 0); - } - - if (e->cipher) { - struct ablkcipher_request *req = e->data + crypto_hash_digestsize(e->hash); - u8 iv[32]; - - memset(iv, 0, sizeof(iv)); - memcpy(iv, &cmd_iv, sizeof(cmd_iv)); - - ablkcipher_request_set_tfm(req, e->cipher); - - err = pohmelfs_crypto_process(req, &sg, &sg, iv, 0, e->timeout); - if (err) - goto err_out_exit; - } - - if (e->hash) { - struct hash_desc desc; - void *dst = e->data + e->size/2; - - desc.tfm = e->hash; - desc.flags = 0; - - err = crypto_hash_init(&desc); - if (err) - goto err_out_exit; - - err = crypto_hash_update(&desc, &sg, size); - if (err) - goto err_out_exit; - - err = crypto_hash_final(&desc, dst); - if (err) - goto err_out_exit; - - err = !!memcmp(dst, e->data, crypto_hash_digestsize(e->hash)); - - if (err) { -#ifdef CONFIG_POHMELFS_DEBUG - unsigned int i; - unsigned char *recv = e->data, *calc = dst; - - dprintk("%s: eng: %p, hash: %p, cipher: %p: iv : %llx, hash mismatch (recv/calc): ", - __func__, e, e->hash, e->cipher, cmd_iv); - for (i = 0; i < crypto_hash_digestsize(e->hash); ++i) { -#if 0 - dprintka("%02x ", recv[i]); - if (recv[i] != calc[i]) { - dprintka("| calc byte: %02x.\n", calc[i]); - break; - } -#else - dprintka("%02x/%02x ", recv[i], calc[i]); -#endif - } - dprintk("\n"); -#endif - goto err_out_exit; - } else { - dprintk("%s: eng: %p, hash: %p, cipher: %p: hashes matched.\n", - __func__, e, e->hash, e->cipher); - } - } - - dprintk("%s: eng: %p, size: %u, hash: %p, cipher: %p: completed.\n", - __func__, e, e->size, e->hash, e->cipher); - - return 0; - -err_out_exit: - dprintk("%s: eng: %p, hash: %p, cipher: %p: err: %d.\n", - __func__, e, e->hash, e->cipher, err); - return err; -} - -static int pohmelfs_trans_iter(struct netfs_trans *t, struct pohmelfs_crypto_engine *e, - int (*iterator) (struct pohmelfs_crypto_engine *e, - struct scatterlist *dst, - struct scatterlist *src)) -{ - void *data = t->iovec.iov_base + sizeof(struct netfs_cmd) + t->psb->crypto_attached_size; - unsigned int size = t->iovec.iov_len - sizeof(struct netfs_cmd) - t->psb->crypto_attached_size; - struct netfs_cmd *cmd = data; - unsigned int sz, pages = t->attached_pages, i, csize, cmd_cmd, dpage_idx; - struct scatterlist sg_src, sg_dst; - int err; - - while (size) { - cmd = data; - cmd_cmd = __be16_to_cpu(cmd->cmd); - csize = __be32_to_cpu(cmd->size); - cmd->iv = __cpu_to_be64(e->iv); - - if (cmd_cmd == NETFS_READ_PAGES || cmd_cmd == NETFS_READ_PAGE) - csize = __be16_to_cpu(cmd->ext); - - sz = csize + __be16_to_cpu(cmd->cpad) + sizeof(struct netfs_cmd); - - dprintk("%s: size: %u, sz: %u, cmd_size: %u, cmd_cpad: %u.\n", - __func__, size, sz, __be32_to_cpu(cmd->size), __be16_to_cpu(cmd->cpad)); - - data += sz; - size -= sz; - - sg_init_one(&sg_src, cmd->data, sz - sizeof(struct netfs_cmd)); - sg_init_one(&sg_dst, cmd->data, sz - sizeof(struct netfs_cmd)); - - err = iterator(e, &sg_dst, &sg_src); - if (err) - return err; - } - - if (!pages) - return 0; - - dpage_idx = 0; - for (i = 0; i < t->page_num; ++i) { - struct page *page = t->pages[i]; - struct page *dpage = e->pages[dpage_idx]; - - if (!page) - continue; - - sg_init_table(&sg_src, 1); - sg_init_table(&sg_dst, 1); - sg_set_page(&sg_src, page, page_private(page), 0); - sg_set_page(&sg_dst, dpage, page_private(page), 0); - - err = iterator(e, &sg_dst, &sg_src); - if (err) - return err; - - pages--; - if (!pages) - break; - dpage_idx++; - } - - return 0; -} - -static int pohmelfs_encrypt_iterator(struct pohmelfs_crypto_engine *e, - struct scatterlist *sg_dst, struct scatterlist *sg_src) -{ - struct ablkcipher_request *req = e->data; - u8 iv[32]; - - memset(iv, 0, sizeof(iv)); - - memcpy(iv, &e->iv, sizeof(e->iv)); - - return pohmelfs_crypto_process(req, sg_dst, sg_src, iv, 1, e->timeout); -} - -static int pohmelfs_encrypt(struct pohmelfs_crypto_thread *tc) -{ - struct netfs_trans *t = tc->trans; - struct pohmelfs_crypto_engine *e = &tc->eng; - struct ablkcipher_request *req = e->data; - - memset(req, 0, sizeof(struct ablkcipher_request)); - ablkcipher_request_set_tfm(req, e->cipher); - - e->iv = pohmelfs_gen_iv(t); - - return pohmelfs_trans_iter(t, e, pohmelfs_encrypt_iterator); -} - -static int pohmelfs_hash_iterator(struct pohmelfs_crypto_engine *e, - struct scatterlist *sg_dst, struct scatterlist *sg_src) -{ - return crypto_hash_update(e->data, sg_src, sg_src->length); -} - -static int pohmelfs_hash(struct pohmelfs_crypto_thread *tc) -{ - struct pohmelfs_crypto_engine *e = &tc->eng; - struct hash_desc *desc = e->data; - unsigned char *dst = tc->trans->iovec.iov_base + sizeof(struct netfs_cmd); - int err; - - desc->tfm = e->hash; - desc->flags = 0; - - err = crypto_hash_init(desc); - if (err) - return err; - - err = pohmelfs_trans_iter(tc->trans, e, pohmelfs_hash_iterator); - if (err) - return err; - - err = crypto_hash_final(desc, dst); - if (err) - return err; - - { - unsigned int i; - dprintk("%s: ", __func__); - for (i = 0; i < tc->psb->crypto_attached_size; ++i) - dprintka("%02x ", dst[i]); - dprintka("\n"); - } - - return 0; -} - -static void pohmelfs_crypto_pages_free(struct pohmelfs_crypto_engine *e) -{ - unsigned int i; - - for (i = 0; i < e->page_num; ++i) - __free_page(e->pages[i]); - kfree(e->pages); -} - -static int pohmelfs_crypto_pages_alloc(struct pohmelfs_crypto_engine *e, struct pohmelfs_sb *psb) -{ - unsigned int i; - - e->pages = kmalloc(psb->trans_max_pages * sizeof(struct page *), GFP_KERNEL); - if (!e->pages) - return -ENOMEM; - - for (i = 0; i < psb->trans_max_pages; ++i) { - e->pages[i] = alloc_page(GFP_KERNEL); - if (!e->pages[i]) - break; - } - - e->page_num = i; - if (!e->page_num) - goto err_out_free; - - return 0; - -err_out_free: - kfree(e->pages); - return -ENOMEM; -} - -static void pohmelfs_sys_crypto_exit_one(struct pohmelfs_crypto_thread *t) -{ - struct pohmelfs_sb *psb = t->psb; - - if (t->thread) - kthread_stop(t->thread); - - mutex_lock(&psb->crypto_thread_lock); - list_del(&t->thread_entry); - psb->crypto_thread_num--; - mutex_unlock(&psb->crypto_thread_lock); - - pohmelfs_crypto_engine_exit(&t->eng); - pohmelfs_crypto_pages_free(&t->eng); - kfree(t); -} - -static int pohmelfs_crypto_finish(struct netfs_trans *t, struct pohmelfs_sb *psb, int err) -{ - struct netfs_cmd *cmd = t->iovec.iov_base; - netfs_convert_cmd(cmd); - - if (likely(!err)) - err = netfs_trans_finish_send(t, psb); - - t->result = err; - netfs_trans_put(t); - - return err; -} - -void pohmelfs_crypto_thread_make_ready(struct pohmelfs_crypto_thread *th) -{ - struct pohmelfs_sb *psb = th->psb; - - th->page = NULL; - th->trans = NULL; - - mutex_lock(&psb->crypto_thread_lock); - list_move_tail(&th->thread_entry, &psb->crypto_ready_list); - mutex_unlock(&psb->crypto_thread_lock); - wake_up(&psb->wait); -} - -static int pohmelfs_crypto_thread_trans(struct pohmelfs_crypto_thread *t) -{ - struct netfs_trans *trans; - int err = 0; - - trans = t->trans; - trans->eng = NULL; - - if (t->eng.hash) { - err = pohmelfs_hash(t); - if (err) - goto out_complete; - } - - if (t->eng.cipher) { - err = pohmelfs_encrypt(t); - if (err) - goto out_complete; - trans->eng = &t->eng; - } - -out_complete: - t->page = NULL; - t->trans = NULL; - - if (!trans->eng) - pohmelfs_crypto_thread_make_ready(t); - - pohmelfs_crypto_finish(trans, t->psb, err); - return err; -} - -static int pohmelfs_crypto_thread_page(struct pohmelfs_crypto_thread *t) -{ - struct pohmelfs_crypto_engine *e = &t->eng; - struct page *page = t->page; - int err; - - WARN_ON(!PageChecked(page)); - - err = pohmelfs_crypto_process_input_data(e, e->iv, NULL, page, t->size); - if (!err) - SetPageUptodate(page); - else - SetPageError(page); - unlock_page(page); - page_cache_release(page); - - pohmelfs_crypto_thread_make_ready(t); - - return err; -} - -static int pohmelfs_crypto_thread_func(void *data) -{ - struct pohmelfs_crypto_thread *t = data; - - while (!kthread_should_stop()) { - wait_event_interruptible(t->wait, kthread_should_stop() || - t->trans || t->page); - - if (kthread_should_stop()) - break; - - if (!t->trans && !t->page) - continue; - - dprintk("%s: thread: %p, trans: %p, page: %p.\n", - __func__, t, t->trans, t->page); - - if (t->trans) - pohmelfs_crypto_thread_trans(t); - else if (t->page) - pohmelfs_crypto_thread_page(t); - } - - return 0; -} - -static void pohmelfs_crypto_flush(struct pohmelfs_sb *psb, struct list_head *head) -{ - while (!list_empty(head)) { - struct pohmelfs_crypto_thread *t = NULL; - - mutex_lock(&psb->crypto_thread_lock); - if (!list_empty(head)) { - t = list_first_entry(head, struct pohmelfs_crypto_thread, thread_entry); - list_del_init(&t->thread_entry); - } - mutex_unlock(&psb->crypto_thread_lock); - - if (t) - pohmelfs_sys_crypto_exit_one(t); - } -} - -static void pohmelfs_sys_crypto_exit(struct pohmelfs_sb *psb) -{ - while (!list_empty(&psb->crypto_active_list) || !list_empty(&psb->crypto_ready_list)) { - dprintk("%s: crypto_thread_num: %u.\n", __func__, psb->crypto_thread_num); - pohmelfs_crypto_flush(psb, &psb->crypto_active_list); - pohmelfs_crypto_flush(psb, &psb->crypto_ready_list); - } -} - -static int pohmelfs_sys_crypto_init(struct pohmelfs_sb *psb) -{ - unsigned int i; - struct pohmelfs_crypto_thread *t; - struct pohmelfs_config *c; - struct netfs_state *st; - int err; - - list_for_each_entry(c, &psb->state_list, config_entry) { - st = &c->state; - - err = pohmelfs_crypto_engine_init(&st->eng, psb); - if (err) - goto err_out_exit; - - dprintk("%s: st: %p, eng: %p, hash: %p, cipher: %p.\n", - __func__, st, &st->eng, &st->eng.hash, &st->eng.cipher); - } - - for (i = 0; i < psb->crypto_thread_num; ++i) { - err = -ENOMEM; - t = kzalloc(sizeof(struct pohmelfs_crypto_thread), GFP_KERNEL); - if (!t) - goto err_out_free_state_engines; - - init_waitqueue_head(&t->wait); - - t->psb = psb; - t->trans = NULL; - t->eng.thread = t; - - err = pohmelfs_crypto_engine_init(&t->eng, psb); - if (err) - goto err_out_free_state_engines; - - err = pohmelfs_crypto_pages_alloc(&t->eng, psb); - if (err) - goto err_out_free; - - t->thread = kthread_run(pohmelfs_crypto_thread_func, t, - "pohmelfs-crypto-%d-%d", psb->idx, i); - if (IS_ERR(t->thread)) { - err = PTR_ERR(t->thread); - t->thread = NULL; - goto err_out_free; - } - - if (t->eng.cipher) - psb->crypto_align_size = crypto_ablkcipher_blocksize(t->eng.cipher); - - mutex_lock(&psb->crypto_thread_lock); - list_add_tail(&t->thread_entry, &psb->crypto_ready_list); - mutex_unlock(&psb->crypto_thread_lock); - } - - psb->crypto_thread_num = i; - return 0; - -err_out_free: - pohmelfs_sys_crypto_exit_one(t); -err_out_free_state_engines: - list_for_each_entry(c, &psb->state_list, config_entry) { - st = &c->state; - pohmelfs_crypto_engine_exit(&st->eng); - } -err_out_exit: - pohmelfs_sys_crypto_exit(psb); - return err; -} - -void pohmelfs_crypto_exit(struct pohmelfs_sb *psb) -{ - pohmelfs_sys_crypto_exit(psb); - - kfree(psb->hash_string); - kfree(psb->cipher_string); -} - -static int pohmelfs_crypt_init_complete(struct page **pages, unsigned int page_num, - void *private, int err) -{ - struct pohmelfs_sb *psb = private; - - psb->flags = -err; - dprintk("%s: err: %d.\n", __func__, err); - - wake_up(&psb->wait); - - return err; -} - -static int pohmelfs_crypto_init_handshake(struct pohmelfs_sb *psb) -{ - struct netfs_trans *t; - struct netfs_crypto_capabilities *cap; - struct netfs_cmd *cmd; - char *str; - int err = -ENOMEM, size; - - size = sizeof(struct netfs_crypto_capabilities) + - psb->cipher_strlen + psb->hash_strlen + 2; /* 0 bytes */ - - t = netfs_trans_alloc(psb, size, 0, 0); - if (!t) - goto err_out_exit; - - t->complete = pohmelfs_crypt_init_complete; - t->private = psb; - - cmd = netfs_trans_current(t); - cap = (struct netfs_crypto_capabilities *)(cmd + 1); - str = (char *)(cap + 1); - - cmd->cmd = NETFS_CAPABILITIES; - cmd->id = POHMELFS_CRYPTO_CAPABILITIES; - cmd->size = size; - cmd->start = 0; - cmd->ext = 0; - cmd->csize = 0; - - netfs_convert_cmd(cmd); - netfs_trans_update(cmd, t, size); - - cap->hash_strlen = psb->hash_strlen; - if (cap->hash_strlen) { - sprintf(str, "%s", psb->hash_string); - str += cap->hash_strlen; - } - - cap->cipher_strlen = psb->cipher_strlen; - cap->cipher_keysize = psb->cipher_keysize; - if (cap->cipher_strlen) - sprintf(str, "%s", psb->cipher_string); - - netfs_convert_crypto_capabilities(cap); - - psb->flags = ~0; - err = netfs_trans_finish(t, psb); - if (err) - goto err_out_exit; - - err = wait_event_interruptible_timeout(psb->wait, (psb->flags != ~0), - psb->wait_on_page_timeout); - if (!err) - err = -ETIMEDOUT; - else if (err > 0) - err = -psb->flags; - - if (!err) - psb->perform_crypto = 1; - psb->flags = 0; - - /* - * At this point NETFS_CAPABILITIES response command - * should setup superblock in a way, which is acceptable - * for both client and server, so if server refuses connection, - * it will send error in transaction response. - */ - - if (err) - goto err_out_exit; - - return 0; - -err_out_exit: - return err; -} - -int pohmelfs_crypto_init(struct pohmelfs_sb *psb) -{ - int err; - - if (!psb->cipher_string && !psb->hash_string) - return 0; - - err = pohmelfs_crypto_init_handshake(psb); - if (err) - return err; - - err = pohmelfs_sys_crypto_init(psb); - if (err) - return err; - - return 0; -} - -static int pohmelfs_crypto_thread_get(struct pohmelfs_sb *psb, - int (*action)(struct pohmelfs_crypto_thread *t, void *data), void *data) -{ - struct pohmelfs_crypto_thread *t = NULL; - int err; - - while (!t) { - err = wait_event_interruptible_timeout(psb->wait, - !list_empty(&psb->crypto_ready_list), - psb->wait_on_page_timeout); - - t = NULL; - err = 0; - mutex_lock(&psb->crypto_thread_lock); - if (!list_empty(&psb->crypto_ready_list)) { - t = list_entry(psb->crypto_ready_list.prev, - struct pohmelfs_crypto_thread, - thread_entry); - - list_move_tail(&t->thread_entry, - &psb->crypto_active_list); - - action(t, data); - wake_up(&t->wait); - - } - mutex_unlock(&psb->crypto_thread_lock); - } - - return err; -} - -static int pohmelfs_trans_crypt_action(struct pohmelfs_crypto_thread *t, void *data) -{ - struct netfs_trans *trans = data; - - netfs_trans_get(trans); - t->trans = trans; - - dprintk("%s: t: %p, gen: %u, thread: %p.\n", __func__, trans, trans->gen, t); - return 0; -} - -int pohmelfs_trans_crypt(struct netfs_trans *trans, struct pohmelfs_sb *psb) -{ - if ((!psb->hash_string && !psb->cipher_string) || !psb->perform_crypto) { - netfs_trans_get(trans); - return pohmelfs_crypto_finish(trans, psb, 0); - } - - return pohmelfs_crypto_thread_get(psb, pohmelfs_trans_crypt_action, trans); -} - -struct pohmelfs_crypto_input_action_data { - struct page *page; - struct pohmelfs_crypto_engine *e; - u64 iv; - unsigned int size; -}; - -static int pohmelfs_crypt_input_page_action(struct pohmelfs_crypto_thread *t, void *data) -{ - struct pohmelfs_crypto_input_action_data *act = data; - - memcpy(t->eng.data, act->e->data, t->psb->crypto_attached_size); - - t->size = act->size; - t->eng.iv = act->iv; - - t->page = act->page; - return 0; -} - -int pohmelfs_crypto_process_input_page(struct pohmelfs_crypto_engine *e, - struct page *page, unsigned int size, u64 iv) -{ - struct inode *inode = page->mapping->host; - struct pohmelfs_crypto_input_action_data act; - int err = -ENOENT; - - act.page = page; - act.e = e; - act.size = size; - act.iv = iv; - - err = pohmelfs_crypto_thread_get(POHMELFS_SB(inode->i_sb), - pohmelfs_crypt_input_page_action, &act); - if (err) - goto err_out_exit; - - return 0; - -err_out_exit: - SetPageUptodate(page); - page_cache_release(page); - - return err; -} |