/*
* Copyright (C) 2003 Jana Saout <jana@saout.de>
* Copyright (C) 2004 Clemens Fruhwirth <clemens@endorphin.org>
- * Copyright (C) 2006-2015 Red Hat, Inc. All rights reserved.
- * Copyright (C) 2013 Milan Broz <gmazyland@gmail.com>
+ * Copyright (C) 2006-2017 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2013-2017 Milan Broz <gmazyland@gmail.com>
*
* This file is released under the GPL.
*/
#include <crypto/md5.h>
#include <crypto/algapi.h>
#include <crypto/skcipher.h>
+#include <crypto/aead.h>
+#include <crypto/authenc.h>
+#include <linux/rtnetlink.h> /* for struct rtattr and RTA macros only */
#include <keys/user-type.h>
#include <linux/device-mapper.h>
struct bvec_iter iter_out;
sector_t cc_sector;
atomic_t cc_pending;
- struct skcipher_request *req;
+ union {
+ struct skcipher_request *req;
+ struct aead_request *req_aead;
+ } r;
+
};
/*
struct dm_crypt_io {
struct crypt_config *cc;
struct bio *base_bio;
+ u8 *integrity_metadata;
+ bool integrity_metadata_from_pool;
struct work_struct work;
struct convert_context ctx;
struct dm_crypt_request {
struct convert_context *ctx;
- struct scatterlist sg_in;
- struct scatterlist sg_out;
+ struct scatterlist sg_in[4];
+ struct scatterlist sg_out[4];
sector_t iv_sector;
};
enum flags { DM_CRYPT_SUSPENDED, DM_CRYPT_KEY_VALID,
DM_CRYPT_SAME_CPU, DM_CRYPT_NO_OFFLOAD };
+enum cipher_flags {
+ CRYPT_MODE_INTEGRITY_AEAD, /* Use authenticated mode for cihper */
+ CRYPT_MODE_INTEGRITY_HMAC, /* Compose authenticated mode from normal mode and HMAC */
+};
+
/*
* The fields in here must be read only after initialization.
*/
sector_t start;
/*
- * pool for per bio private data, crypto requests and
- * encryption requeusts/buffer pages
+ * pool for per bio private data, crypto requests,
+ * encryption requeusts/buffer pages and integrity tags
*/
mempool_t *req_pool;
mempool_t *page_pool;
+ mempool_t *tag_pool;
+ unsigned tag_pool_max_sectors;
+
struct bio_set *bs;
struct mutex bio_alloc_lock;
char *cipher;
char *cipher_string;
+ char *cipher_auth;
char *key_string;
const struct crypt_iv_operations *iv_gen_ops;
/* ESSIV: struct crypto_cipher *essiv_tfm */
void *iv_private;
- struct crypto_skcipher **tfms;
+ union {
+ struct crypto_skcipher **tfms;
+ struct crypto_aead **tfms_aead;
+ } cipher_tfm;
unsigned tfms_count;
+ unsigned long cipher_flags;
/*
* Layout of each crypto request:
unsigned int key_size;
unsigned int key_parts; /* independent parts in key buffer */
unsigned int key_extra_size; /* additional keys length */
+ unsigned int key_mac_size; /* MAC key size for authenc(...) */
+
+ unsigned int integrity_tag_size;
+ unsigned int integrity_iv_size;
+ unsigned int on_disk_tag_size;
+
+ u8 *authenc_key; /* space for keys in authenc() format (if used) */
u8 key[0];
};
-#define MIN_IOS 64
+#define MIN_IOS 64
+#define MAX_TAG_SIZE 480
+#define POOL_ENTRY_SIZE 512
static void clone_init(struct dm_crypt_io *, struct bio *);
static void kcryptd_queue_crypt(struct dm_crypt_io *io);
-static u8 *iv_of_dmreq(struct crypt_config *cc, struct dm_crypt_request *dmreq);
+static struct scatterlist *crypt_get_sg_data(struct crypt_config *cc,
+ struct scatterlist *sg);
/*
* Use this to access cipher attributes that are the same for each CPU.
*/
static struct crypto_skcipher *any_tfm(struct crypt_config *cc)
{
- return cc->tfms[0];
+ return cc->cipher_tfm.tfms[0];
+}
+
+static struct crypto_aead *any_tfm_aead(struct crypt_config *cc)
+{
+ return cc->cipher_tfm.tfms_aead[0];
}
/*
return essiv_tfm;
}
- if (crypto_cipher_blocksize(essiv_tfm) !=
- crypto_skcipher_ivsize(any_tfm(cc))) {
+ if (crypto_cipher_blocksize(essiv_tfm) != cc->iv_size) {
ti->error = "Block size of ESSIV cipher does "
"not match IV size of block cipher";
crypto_free_cipher(essiv_tfm);
essiv_tfm = setup_essiv_cpu(cc, ti, salt,
crypto_ahash_digestsize(hash_tfm));
+
if (IS_ERR(essiv_tfm)) {
crypt_iv_essiv_dtr(cc);
return PTR_ERR(essiv_tfm);
static int crypt_iv_lmk_gen(struct crypt_config *cc, u8 *iv,
struct dm_crypt_request *dmreq)
{
+ struct scatterlist *sg;
u8 *src;
int r = 0;
if (bio_data_dir(dmreq->ctx->bio_in) == WRITE) {
- src = kmap_atomic(sg_page(&dmreq->sg_in));
- r = crypt_iv_lmk_one(cc, iv, dmreq, src + dmreq->sg_in.offset);
+ sg = crypt_get_sg_data(cc, dmreq->sg_in);
+ src = kmap_atomic(sg_page(sg));
+ r = crypt_iv_lmk_one(cc, iv, dmreq, src + sg->offset);
kunmap_atomic(src);
} else
memset(iv, 0, cc->iv_size);
static int crypt_iv_lmk_post(struct crypt_config *cc, u8 *iv,
struct dm_crypt_request *dmreq)
{
+ struct scatterlist *sg;
u8 *dst;
int r;
if (bio_data_dir(dmreq->ctx->bio_in) == WRITE)
return 0;
- dst = kmap_atomic(sg_page(&dmreq->sg_out));
- r = crypt_iv_lmk_one(cc, iv, dmreq, dst + dmreq->sg_out.offset);
+ sg = crypt_get_sg_data(cc, dmreq->sg_out);
+ dst = kmap_atomic(sg_page(sg));
+ r = crypt_iv_lmk_one(cc, iv, dmreq, dst + sg->offset);
/* Tweak the first block of plaintext sector */
if (!r)
- crypto_xor(dst + dmreq->sg_out.offset, iv, cc->iv_size);
+ crypto_xor(dst + sg->offset, iv, cc->iv_size);
kunmap_atomic(dst);
return r;
static int crypt_iv_tcw_gen(struct crypt_config *cc, u8 *iv,
struct dm_crypt_request *dmreq)
{
+ struct scatterlist *sg;
struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw;
__le64 sector = cpu_to_le64(dmreq->iv_sector);
u8 *src;
/* Remove whitening from ciphertext */
if (bio_data_dir(dmreq->ctx->bio_in) != WRITE) {
- src = kmap_atomic(sg_page(&dmreq->sg_in));
- r = crypt_iv_tcw_whitening(cc, dmreq, src + dmreq->sg_in.offset);
+ sg = crypt_get_sg_data(cc, dmreq->sg_in);
+ src = kmap_atomic(sg_page(sg));
+ r = crypt_iv_tcw_whitening(cc, dmreq, src + sg->offset);
kunmap_atomic(src);
}
static int crypt_iv_tcw_post(struct crypt_config *cc, u8 *iv,
struct dm_crypt_request *dmreq)
{
+ struct scatterlist *sg;
u8 *dst;
int r;
return 0;
/* Apply whitening on ciphertext */
- dst = kmap_atomic(sg_page(&dmreq->sg_out));
- r = crypt_iv_tcw_whitening(cc, dmreq, dst + dmreq->sg_out.offset);
+ sg = crypt_get_sg_data(cc, dmreq->sg_out);
+ dst = kmap_atomic(sg_page(sg));
+ r = crypt_iv_tcw_whitening(cc, dmreq, dst + sg->offset);
kunmap_atomic(dst);
return r;
}
+static int crypt_iv_random_gen(struct crypt_config *cc, u8 *iv,
+ struct dm_crypt_request *dmreq)
+{
+ /* Used only for writes, there must be an additional space to store IV */
+ get_random_bytes(iv, cc->iv_size);
+ return 0;
+}
+
static const struct crypt_iv_operations crypt_iv_plain_ops = {
.generator = crypt_iv_plain_gen
};
.post = crypt_iv_tcw_post
};
+static struct crypt_iv_operations crypt_iv_random_ops = {
+ .generator = crypt_iv_random_gen
+};
+
+/*
+ * Integrity extensions
+ */
+static bool crypt_integrity_aead(struct crypt_config *cc)
+{
+ return test_bit(CRYPT_MODE_INTEGRITY_AEAD, &cc->cipher_flags);
+}
+
+static bool crypt_integrity_hmac(struct crypt_config *cc)
+{
+ return test_bit(CRYPT_MODE_INTEGRITY_HMAC, &cc->cipher_flags);
+}
+
+static bool crypt_integrity_mode(struct crypt_config *cc)
+{
+ return crypt_integrity_aead(cc) || crypt_integrity_hmac(cc);
+}
+
+/* Get sg containing data */
+static struct scatterlist *crypt_get_sg_data(struct crypt_config *cc,
+ struct scatterlist *sg)
+{
+ if (unlikely(crypt_integrity_mode(cc)))
+ return &sg[2];
+
+ return sg;
+}
+
+static int dm_crypt_integrity_io_alloc(struct dm_crypt_io *io, struct bio *bio)
+{
+ struct bio_integrity_payload *bip;
+ unsigned int tag_len;
+ int ret;
+
+ if (!bio_sectors(bio) || !io->cc->on_disk_tag_size)
+ return 0;
+
+ bip = bio_integrity_alloc(bio, GFP_NOIO, 1);
+ if (IS_ERR(bip))
+ return PTR_ERR(bip);
+
+ tag_len = io->cc->on_disk_tag_size * bio_sectors(bio);
+
+ bip->bip_iter.bi_size = tag_len;
+ bip->bip_iter.bi_sector = io->cc->start + io->sector;
+
+ /* We own the metadata, do not let bio_free to release it */
+ bip->bip_flags &= ~BIP_BLOCK_INTEGRITY;
+
+ ret = bio_integrity_add_page(bio, virt_to_page(io->integrity_metadata),
+ tag_len, offset_in_page(io->integrity_metadata));
+ if (unlikely(ret != tag_len))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int crypt_integrity_ctr(struct crypt_config *cc, struct dm_target *ti)
+{
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+ struct blk_integrity *bi = blk_get_integrity(cc->dev->bdev->bd_disk);
+
+ /* From now we require underlying device with our integrity profile */
+ if (!bi || strcasecmp(bi->profile->name, "DM-DIF-EXT-TAG")) {
+ ti->error = "Integrity profile not supported.";
+ return -EINVAL;
+ }
+
+ if (bi->tag_size != cc->on_disk_tag_size) {
+ ti->error = "Integrity profile tag size mismatch.";
+ return -EINVAL;
+ }
+
+ if (crypt_integrity_mode(cc)) {
+ cc->integrity_tag_size = cc->on_disk_tag_size - cc->integrity_iv_size;
+ DMINFO("Integrity AEAD, tag size %u, IV size %u.",
+ cc->integrity_tag_size, cc->integrity_iv_size);
+
+ if (crypto_aead_setauthsize(any_tfm_aead(cc), cc->integrity_tag_size)) {
+ ti->error = "Integrity AEAD auth tag size is not supported.";
+ return -EINVAL;
+ }
+ } else if (cc->integrity_iv_size)
+ DMINFO("Additional per-sector space %u bytes for IV.",
+ cc->integrity_iv_size);
+
+ if ((cc->integrity_tag_size + cc->integrity_iv_size) != bi->tag_size) {
+ ti->error = "Not enough space for integrity tag in the profile.";
+ return -EINVAL;
+ }
+
+ return 0;
+#else
+ ti->error = "Integrity profile not supported.";
+ return -EINVAL;
+#endif
+}
+
static void crypt_convert_init(struct crypt_config *cc,
struct convert_context *ctx,
struct bio *bio_out, struct bio *bio_in,
}
static struct dm_crypt_request *dmreq_of_req(struct crypt_config *cc,
- struct skcipher_request *req)
+ void *req)
{
return (struct dm_crypt_request *)((char *)req + cc->dmreq_start);
}
-static struct skcipher_request *req_of_dmreq(struct crypt_config *cc,
- struct dm_crypt_request *dmreq)
+static void *req_of_dmreq(struct crypt_config *cc, struct dm_crypt_request *dmreq)
{
- return (struct skcipher_request *)((char *)dmreq - cc->dmreq_start);
+ return (void *)((char *)dmreq - cc->dmreq_start);
}
static u8 *iv_of_dmreq(struct crypt_config *cc,
struct dm_crypt_request *dmreq)
{
- return (u8 *)ALIGN((unsigned long)(dmreq + 1),
- crypto_skcipher_alignmask(any_tfm(cc)) + 1);
+ if (crypt_integrity_mode(cc))
+ return (u8 *)ALIGN((unsigned long)(dmreq + 1),
+ crypto_aead_alignmask(any_tfm_aead(cc)) + 1);
+ else
+ return (u8 *)ALIGN((unsigned long)(dmreq + 1),
+ crypto_skcipher_alignmask(any_tfm(cc)) + 1);
}
-static int crypt_convert_block(struct crypt_config *cc,
- struct convert_context *ctx,
- struct skcipher_request *req)
+static u8 *org_iv_of_dmreq(struct crypt_config *cc,
+ struct dm_crypt_request *dmreq)
+{
+ return iv_of_dmreq(cc, dmreq) + cc->iv_size;
+}
+
+static uint64_t *org_sector_of_dmreq(struct crypt_config *cc,
+ struct dm_crypt_request *dmreq)
+{
+ u8 *ptr = iv_of_dmreq(cc, dmreq) + cc->iv_size + cc->iv_size;
+ return (uint64_t*) ptr;
+}
+
+static unsigned int *org_tag_of_dmreq(struct crypt_config *cc,
+ struct dm_crypt_request *dmreq)
+{
+ u8 *ptr = iv_of_dmreq(cc, dmreq) + cc->iv_size +
+ cc->iv_size + sizeof(uint64_t);
+ return (unsigned int*)ptr;
+}
+
+static void *tag_from_dmreq(struct crypt_config *cc,
+ struct dm_crypt_request *dmreq)
+{
+ struct convert_context *ctx = dmreq->ctx;
+ struct dm_crypt_io *io = container_of(ctx, struct dm_crypt_io, ctx);
+
+ return &io->integrity_metadata[*org_tag_of_dmreq(cc, dmreq) *
+ cc->on_disk_tag_size];
+}
+
+static void *iv_tag_from_dmreq(struct crypt_config *cc,
+ struct dm_crypt_request *dmreq)
+{
+ return tag_from_dmreq(cc, dmreq) + cc->integrity_tag_size;
+}
+
+static int crypt_convert_block_aead(struct crypt_config *cc,
+ struct convert_context *ctx,
+ struct aead_request *req,
+ unsigned int tag_offset)
{
struct bio_vec bv_in = bio_iter_iovec(ctx->bio_in, ctx->iter_in);
struct bio_vec bv_out = bio_iter_iovec(ctx->bio_out, ctx->iter_out);
struct dm_crypt_request *dmreq;
- u8 *iv;
- int r;
+ unsigned int data_len = 1 << SECTOR_SHIFT;
+ u8 *iv, *org_iv, *tag_iv, *tag;
+ uint64_t *sector;
+ int r = 0;
+
+ BUG_ON(cc->integrity_iv_size && cc->integrity_iv_size != cc->iv_size);
dmreq = dmreq_of_req(cc, req);
+ dmreq->iv_sector = ctx->cc_sector;
+ dmreq->ctx = ctx;
+
+ *org_tag_of_dmreq(cc, dmreq) = tag_offset;
+
+ sector = org_sector_of_dmreq(cc, dmreq);
+ *sector = cpu_to_le64(ctx->cc_sector - cc->iv_offset);
+
iv = iv_of_dmreq(cc, dmreq);
+ org_iv = org_iv_of_dmreq(cc, dmreq);
+ tag = tag_from_dmreq(cc, dmreq);
+ tag_iv = iv_tag_from_dmreq(cc, dmreq);
+
+ /* AEAD request:
+ * |----- AAD -------|------ DATA -------|-- AUTH TAG --|
+ * | (authenticated) | (auth+encryption) | |
+ * | sector_LE | IV | sector in/out | tag in/out |
+ */
+ sg_init_table(dmreq->sg_in, 4);
+ sg_set_buf(&dmreq->sg_in[0], sector, sizeof(uint64_t));
+ sg_set_buf(&dmreq->sg_in[1], org_iv, cc->iv_size);
+ sg_set_page(&dmreq->sg_in[2], bv_in.bv_page, data_len, bv_in.bv_offset);
+ sg_set_buf(&dmreq->sg_in[3], tag, cc->integrity_tag_size);
+
+ sg_init_table(dmreq->sg_out, 4);
+ sg_set_buf(&dmreq->sg_out[0], sector, sizeof(uint64_t));
+ sg_set_buf(&dmreq->sg_out[1], org_iv, cc->iv_size);
+ sg_set_page(&dmreq->sg_out[2], bv_out.bv_page, data_len, bv_out.bv_offset);
+ sg_set_buf(&dmreq->sg_out[3], tag, cc->integrity_tag_size);
+
+ if (cc->iv_gen_ops) {
+ /* For READs use IV stored in integrity metadata */
+ if (cc->integrity_iv_size && bio_data_dir(ctx->bio_in) != WRITE) {
+ memcpy(org_iv, tag_iv, cc->iv_size);
+ } else {
+ r = cc->iv_gen_ops->generator(cc, org_iv, dmreq);
+ if (r < 0)
+ return r;
+ /* Store generated IV in integrity metadata */
+ if (cc->integrity_iv_size)
+ memcpy(tag_iv, org_iv, cc->iv_size);
+ }
+ /* Working copy of IV, to be modified in crypto API */
+ memcpy(iv, org_iv, cc->iv_size);
+ }
+
+ aead_request_set_ad(req, sizeof(uint64_t) + cc->iv_size);
+ if (bio_data_dir(ctx->bio_in) == WRITE) {
+ aead_request_set_crypt(req, dmreq->sg_in, dmreq->sg_out,
+ data_len, iv);
+ r = crypto_aead_encrypt(req);
+ if (cc->integrity_tag_size + cc->integrity_iv_size != cc->on_disk_tag_size)
+ memset(tag + cc->integrity_tag_size + cc->integrity_iv_size, 0,
+ cc->on_disk_tag_size - (cc->integrity_tag_size + cc->integrity_iv_size));
+ } else {
+ aead_request_set_crypt(req, dmreq->sg_in, dmreq->sg_out,
+ data_len + cc->integrity_tag_size, iv);
+ r = crypto_aead_decrypt(req);
+ }
+
+ if (r == -EBADMSG)
+ DMERR_LIMIT("INTEGRITY AEAD ERROR, sector %llu",
+ (unsigned long long)le64_to_cpu(*sector));
+
+ if (!r && cc->iv_gen_ops && cc->iv_gen_ops->post)
+ r = cc->iv_gen_ops->post(cc, org_iv, dmreq);
+
+ bio_advance_iter(ctx->bio_in, &ctx->iter_in, data_len);
+ bio_advance_iter(ctx->bio_out, &ctx->iter_out, data_len);
+ return r;
+}
+
+static int crypt_convert_block_skcipher(struct crypt_config *cc,
+ struct convert_context *ctx,
+ struct skcipher_request *req,
+ unsigned int tag_offset)
+{
+ struct bio_vec bv_in = bio_iter_iovec(ctx->bio_in, ctx->iter_in);
+ struct bio_vec bv_out = bio_iter_iovec(ctx->bio_out, ctx->iter_out);
+ struct scatterlist *sg_in, *sg_out;
+ struct dm_crypt_request *dmreq;
+ unsigned int data_len = 1 << SECTOR_SHIFT;
+ u8 *iv, *org_iv, *tag_iv;
+ uint64_t *sector;
+ int r = 0;
+
+ dmreq = dmreq_of_req(cc, req);
dmreq->iv_sector = ctx->cc_sector;
dmreq->ctx = ctx;
- sg_init_table(&dmreq->sg_in, 1);
- sg_set_page(&dmreq->sg_in, bv_in.bv_page, 1 << SECTOR_SHIFT,
- bv_in.bv_offset);
- sg_init_table(&dmreq->sg_out, 1);
- sg_set_page(&dmreq->sg_out, bv_out.bv_page, 1 << SECTOR_SHIFT,
- bv_out.bv_offset);
+ *org_tag_of_dmreq(cc, dmreq) = tag_offset;
+
+ iv = iv_of_dmreq(cc, dmreq);
+ org_iv = org_iv_of_dmreq(cc, dmreq);
+ tag_iv = iv_tag_from_dmreq(cc, dmreq);
+
+ sector = org_sector_of_dmreq(cc, dmreq);
+ *sector = cpu_to_le64(ctx->cc_sector - cc->iv_offset);
+
+ /* For skcipher we use only the first sg item */
+ sg_in = &dmreq->sg_in[0];
+ sg_out = &dmreq->sg_out[0];
- bio_advance_iter(ctx->bio_in, &ctx->iter_in, 1 << SECTOR_SHIFT);
- bio_advance_iter(ctx->bio_out, &ctx->iter_out, 1 << SECTOR_SHIFT);
+ sg_init_table(sg_in, 1);
+ sg_set_page(sg_in, bv_in.bv_page, data_len, bv_in.bv_offset);
+
+ sg_init_table(sg_out, 1);
+ sg_set_page(sg_out, bv_out.bv_page, data_len, bv_out.bv_offset);
if (cc->iv_gen_ops) {
- r = cc->iv_gen_ops->generator(cc, iv, dmreq);
- if (r < 0)
- return r;
+ /* For READs use IV stored in integrity metadata */
+ if (cc->integrity_iv_size && bio_data_dir(ctx->bio_in) != WRITE) {
+ memcpy(org_iv, tag_iv, cc->integrity_iv_size);
+ } else {
+ r = cc->iv_gen_ops->generator(cc, org_iv, dmreq);
+ if (r < 0)
+ return r;
+ /* Store generated IV in integrity metadata */
+ if (cc->integrity_iv_size)
+ memcpy(tag_iv, org_iv, cc->integrity_iv_size);
+ }
+ /* Working copy of IV, to be modified in crypto API */
+ memcpy(iv, org_iv, cc->iv_size);
}
- skcipher_request_set_crypt(req, &dmreq->sg_in, &dmreq->sg_out,
- 1 << SECTOR_SHIFT, iv);
+ skcipher_request_set_crypt(req, sg_in, sg_out, data_len, iv);
if (bio_data_dir(ctx->bio_in) == WRITE)
r = crypto_skcipher_encrypt(req);
r = crypto_skcipher_decrypt(req);
if (!r && cc->iv_gen_ops && cc->iv_gen_ops->post)
- r = cc->iv_gen_ops->post(cc, iv, dmreq);
+ r = cc->iv_gen_ops->post(cc, org_iv, dmreq);
+
+ bio_advance_iter(ctx->bio_in, &ctx->iter_in, data_len);
+ bio_advance_iter(ctx->bio_out, &ctx->iter_out, data_len);
return r;
}
static void kcryptd_async_done(struct crypto_async_request *async_req,
int error);
-static void crypt_alloc_req(struct crypt_config *cc,
- struct convert_context *ctx)
+static void crypt_alloc_req_skcipher(struct crypt_config *cc,
+ struct convert_context *ctx)
{
unsigned key_index = ctx->cc_sector & (cc->tfms_count - 1);
- if (!ctx->req)
- ctx->req = mempool_alloc(cc->req_pool, GFP_NOIO);
+ if (!ctx->r.req)
+ ctx->r.req = mempool_alloc(cc->req_pool, GFP_NOIO);
+
+ skcipher_request_set_tfm(ctx->r.req, cc->cipher_tfm.tfms[key_index]);
+
+ /*
+ * Use REQ_MAY_BACKLOG so a cipher driver internally backlogs
+ * requests if driver request queue is full.
+ */
+ skcipher_request_set_callback(ctx->r.req,
+ CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
+ kcryptd_async_done, dmreq_of_req(cc, ctx->r.req));
+}
+
+static void crypt_alloc_req_aead(struct crypt_config *cc,
+ struct convert_context *ctx)
+{
+ if (!ctx->r.req_aead)
+ ctx->r.req_aead = mempool_alloc(cc->req_pool, GFP_NOIO);
- skcipher_request_set_tfm(ctx->req, cc->tfms[key_index]);
+ aead_request_set_tfm(ctx->r.req_aead, cc->cipher_tfm.tfms_aead[0]);
/*
* Use REQ_MAY_BACKLOG so a cipher driver internally backlogs
* requests if driver request queue is full.
*/
- skcipher_request_set_callback(ctx->req,
+ aead_request_set_callback(ctx->r.req_aead,
CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
- kcryptd_async_done, dmreq_of_req(cc, ctx->req));
+ kcryptd_async_done, dmreq_of_req(cc, ctx->r.req_aead));
+}
+
+static void crypt_alloc_req(struct crypt_config *cc,
+ struct convert_context *ctx)
+{
+ if (crypt_integrity_mode(cc))
+ crypt_alloc_req_aead(cc, ctx);
+ else
+ crypt_alloc_req_skcipher(cc, ctx);
}
-static void crypt_free_req(struct crypt_config *cc,
- struct skcipher_request *req, struct bio *base_bio)
+static void crypt_free_req_skcipher(struct crypt_config *cc,
+ struct skcipher_request *req, struct bio *base_bio)
{
struct dm_crypt_io *io = dm_per_bio_data(base_bio, cc->per_bio_data_size);
mempool_free(req, cc->req_pool);
}
+static void crypt_free_req_aead(struct crypt_config *cc,
+ struct aead_request *req, struct bio *base_bio)
+{
+ struct dm_crypt_io *io = dm_per_bio_data(base_bio, cc->per_bio_data_size);
+
+ if ((struct aead_request *)(io + 1) != req)
+ mempool_free(req, cc->req_pool);
+}
+
+static void crypt_free_req(struct crypt_config *cc, void *req, struct bio *base_bio)
+{
+ if (crypt_integrity_mode(cc))
+ crypt_free_req_aead(cc, req, base_bio);
+ else
+ crypt_free_req_skcipher(cc, req, base_bio);
+}
+
/*
* Encrypt / decrypt data from one bio to another one (can be the same one)
*/
static int crypt_convert(struct crypt_config *cc,
struct convert_context *ctx)
{
+ unsigned int tag_offset = 0;
int r;
atomic_set(&ctx->cc_pending, 1);
atomic_inc(&ctx->cc_pending);
- r = crypt_convert_block(cc, ctx, ctx->req);
+ if (crypt_integrity_mode(cc))
+ r = crypt_convert_block_aead(cc, ctx, ctx->r.req_aead, tag_offset);
+ else
+ r = crypt_convert_block_skcipher(cc, ctx, ctx->r.req, tag_offset);
switch (r) {
/*
* completion function kcryptd_async_done() will be called.
*/
case -EINPROGRESS:
- ctx->req = NULL;
+ ctx->r.req = NULL;
ctx->cc_sector++;
+ tag_offset++;
continue;
/*
* The request was already processed (synchronously).
case 0:
atomic_dec(&ctx->cc_pending);
ctx->cc_sector++;
+ tag_offset++;
cond_resched();
continue;
-
- /* There was an error while processing the request. */
+ /*
+ * There was a data integrity error.
+ */
+ case -EBADMSG:
+ atomic_dec(&ctx->cc_pending);
+ return -EILSEQ;
+ /*
+ * There was an error while processing the request.
+ */
default:
atomic_dec(&ctx->cc_pending);
- return r;
+ return -EIO;
}
}
clone = bio_alloc_bioset(GFP_NOIO, nr_iovecs, cc->bs);
if (!clone)
- goto return_clone;
+ goto out;
clone_init(io, clone);
remaining_size -= len;
}
-return_clone:
+ /* Allocate space for integrity tags */
+ if (dm_crypt_integrity_io_alloc(io, clone)) {
+ crypt_free_buffer_pages(cc, clone);
+ bio_put(clone);
+ clone = NULL;
+ }
+out:
if (unlikely(gfp_mask & __GFP_DIRECT_RECLAIM))
mutex_unlock(&cc->bio_alloc_lock);
io->base_bio = bio;
io->sector = sector;
io->error = 0;
- io->ctx.req = NULL;
+ io->ctx.r.req = NULL;
+ io->integrity_metadata = NULL;
+ io->integrity_metadata_from_pool = false;
atomic_set(&io->io_pending, 0);
}
if (!atomic_dec_and_test(&io->io_pending))
return;
- if (io->ctx.req)
- crypt_free_req(cc, io->ctx.req, base_bio);
+ if (io->ctx.r.req)
+ crypt_free_req(cc, io->ctx.r.req, base_bio);
+
+ if (unlikely(io->integrity_metadata_from_pool))
+ mempool_free(io->integrity_metadata, io->cc->tag_pool);
+ else
+ kfree(io->integrity_metadata);
base_bio->bi_error = error;
bio_endio(base_bio);
clone_init(io, clone);
clone->bi_iter.bi_sector = cc->start + io->sector;
+ if (dm_crypt_integrity_io_alloc(io, clone)) {
+ crypt_dec_pending(io);
+ bio_put(clone);
+ return 1;
+ }
+
generic_make_request(clone);
return 0;
}
crypt_inc_pending(io);
r = crypt_convert(cc, &io->ctx);
- if (r)
- io->error = -EIO;
+ if (r < 0)
+ io->error = r;
crypt_finished = atomic_dec_and_test(&io->ctx.cc_pending);
/* Encryption was already finished, submit io now */
r = crypt_convert(cc, &io->ctx);
if (r < 0)
- io->error = -EIO;
+ io->error = r;
if (atomic_dec_and_test(&io->ctx.cc_pending))
kcryptd_crypt_read_done(io);
}
if (!error && cc->iv_gen_ops && cc->iv_gen_ops->post)
- error = cc->iv_gen_ops->post(cc, iv_of_dmreq(cc, dmreq), dmreq);
+ error = cc->iv_gen_ops->post(cc, org_iv_of_dmreq(cc, dmreq), dmreq);
- if (error < 0)
+ if (error == -EBADMSG) {
+ DMERR_LIMIT("INTEGRITY AEAD ERROR, sector %llu",
+ (unsigned long long)le64_to_cpu(*org_sector_of_dmreq(cc, dmreq)));
+ io->error = -EILSEQ;
+ } else if (error < 0)
io->error = -EIO;
crypt_free_req(cc, req_of_dmreq(cc, dmreq), io->base_bio);
return 0;
}
-static void crypt_free_tfms(struct crypt_config *cc)
+static void crypt_free_tfms_aead(struct crypt_config *cc)
+{
+ if (!cc->cipher_tfm.tfms_aead)
+ return;
+
+ if (cc->cipher_tfm.tfms_aead[0] && !IS_ERR(cc->cipher_tfm.tfms_aead[0])) {
+ crypto_free_aead(cc->cipher_tfm.tfms_aead[0]);
+ cc->cipher_tfm.tfms_aead[0] = NULL;
+ }
+
+ kfree(cc->cipher_tfm.tfms_aead);
+ cc->cipher_tfm.tfms_aead = NULL;
+}
+
+static void crypt_free_tfms_skcipher(struct crypt_config *cc)
{
unsigned i;
- if (!cc->tfms)
+ if (!cc->cipher_tfm.tfms)
return;
for (i = 0; i < cc->tfms_count; i++)
- if (cc->tfms[i] && !IS_ERR(cc->tfms[i])) {
- crypto_free_skcipher(cc->tfms[i]);
- cc->tfms[i] = NULL;
+ if (cc->cipher_tfm.tfms[i] && !IS_ERR(cc->cipher_tfm.tfms[i])) {
+ crypto_free_skcipher(cc->cipher_tfm.tfms[i]);
+ cc->cipher_tfm.tfms[i] = NULL;
}
- kfree(cc->tfms);
- cc->tfms = NULL;
+ kfree(cc->cipher_tfm.tfms);
+ cc->cipher_tfm.tfms = NULL;
}
-static int crypt_alloc_tfms(struct crypt_config *cc, char *ciphermode)
+static void crypt_free_tfms(struct crypt_config *cc)
+{
+ if (crypt_integrity_mode(cc))
+ crypt_free_tfms_aead(cc);
+ else
+ crypt_free_tfms_skcipher(cc);
+}
+
+static int crypt_alloc_tfms_skcipher(struct crypt_config *cc, char *ciphermode)
{
unsigned i;
int err;
- cc->tfms = kzalloc(cc->tfms_count * sizeof(struct crypto_skcipher *),
- GFP_KERNEL);
- if (!cc->tfms)
+ cc->cipher_tfm.tfms = kzalloc(cc->tfms_count *
+ sizeof(struct crypto_skcipher *), GFP_KERNEL);
+ if (!cc->cipher_tfm.tfms)
return -ENOMEM;
for (i = 0; i < cc->tfms_count; i++) {
- cc->tfms[i] = crypto_alloc_skcipher(ciphermode, 0, 0);
- if (IS_ERR(cc->tfms[i])) {
- err = PTR_ERR(cc->tfms[i]);
+ cc->cipher_tfm.tfms[i] = crypto_alloc_skcipher(ciphermode, 0, 0);
+ if (IS_ERR(cc->cipher_tfm.tfms[i])) {
+ err = PTR_ERR(cc->cipher_tfm.tfms[i]);
crypt_free_tfms(cc);
return err;
}
return 0;
}
+static int crypt_alloc_tfms_aead(struct crypt_config *cc, char *ciphermode)
+{
+ char *authenc = NULL;
+ int err;
+
+ cc->cipher_tfm.tfms = kmalloc(sizeof(struct crypto_aead *), GFP_KERNEL);
+ if (!cc->cipher_tfm.tfms)
+ return -ENOMEM;
+
+ /* Compose AEAD cipher with autenc(authenticator,cipher) structure */
+ if (crypt_integrity_hmac(cc)) {
+ authenc = kmalloc(CRYPTO_MAX_ALG_NAME, GFP_KERNEL);
+ if (!authenc)
+ return -ENOMEM;
+ err = snprintf(authenc, CRYPTO_MAX_ALG_NAME,
+ "authenc(%s,%s)", cc->cipher_auth, ciphermode);
+ if (err < 0) {
+ kzfree(authenc);
+ return err;
+ }
+ ciphermode = authenc;
+ }
+
+ cc->cipher_tfm.tfms_aead[0] = crypto_alloc_aead(ciphermode, 0, 0);
+ if (IS_ERR(cc->cipher_tfm.tfms_aead[0])) {
+ err = PTR_ERR(cc->cipher_tfm.tfms_aead[0]);
+ crypt_free_tfms(cc);
+ return err;
+ }
+
+ kzfree(authenc);
+ return 0;
+}
+
+static int crypt_alloc_tfms(struct crypt_config *cc, char *ciphermode)
+{
+ if (crypt_integrity_mode(cc))
+ return crypt_alloc_tfms_aead(cc, ciphermode);
+ else
+ return crypt_alloc_tfms_skcipher(cc, ciphermode);
+}
+
+static unsigned crypt_subkey_size(struct crypt_config *cc)
+{
+ return (cc->key_size - cc->key_extra_size) >> ilog2(cc->tfms_count);
+}
+
+static unsigned crypt_authenckey_size(struct crypt_config *cc)
+{
+ return crypt_subkey_size(cc) + RTA_SPACE(sizeof(struct crypto_authenc_key_param));
+}
+
+/*
+ * If AEAD is composed like authenc(hmac(sha256),xts(aes)),
+ * the key must be for some reason in special format.
+ * This funcion converts cc->key to this special format.
+ */
+static void crypt_copy_authenckey(char *p, const void *key,
+ unsigned enckeylen, unsigned authkeylen)
+{
+ struct crypto_authenc_key_param *param;
+ struct rtattr *rta;
+
+ rta = (struct rtattr *)p;
+ param = RTA_DATA(rta);
+ param->enckeylen = cpu_to_be32(enckeylen);
+ rta->rta_len = RTA_LENGTH(sizeof(*param));
+ rta->rta_type = CRYPTO_AUTHENC_KEYA_PARAM;
+ p += RTA_SPACE(sizeof(*param));
+ memcpy(p, key + enckeylen, authkeylen);
+ p += authkeylen;
+ memcpy(p, key, enckeylen);
+}
+
static int crypt_setkey(struct crypt_config *cc)
{
unsigned subkey_size;
int err = 0, i, r;
/* Ignore extra keys (which are used for IV etc) */
- subkey_size = (cc->key_size - cc->key_extra_size) >> ilog2(cc->tfms_count);
+ subkey_size = crypt_subkey_size(cc);
+ if (crypt_integrity_hmac(cc))
+ crypt_copy_authenckey(cc->authenc_key, cc->key,
+ subkey_size - cc->key_mac_size,
+ cc->key_mac_size);
for (i = 0; i < cc->tfms_count; i++) {
- r = crypto_skcipher_setkey(cc->tfms[i],
- cc->key + (i * subkey_size),
- subkey_size);
+ if (crypt_integrity_aead(cc))
+ r = crypto_aead_setkey(cc->cipher_tfm.tfms_aead[i],
+ cc->key + (i * subkey_size),
+ subkey_size);
+ else if (crypt_integrity_hmac(cc))
+ r = crypto_aead_setkey(cc->cipher_tfm.tfms_aead[i],
+ cc->authenc_key, crypt_authenckey_size(cc));
+ else
+ r = crypto_skcipher_setkey(cc->cipher_tfm.tfms[i],
+ cc->key + (i * subkey_size),
+ subkey_size);
if (r)
err = r;
}
+ if (crypt_integrity_hmac(cc))
+ memzero_explicit(cc->authenc_key, crypt_authenckey_size(cc));
+
return err;
}
mempool_destroy(cc->page_pool);
mempool_destroy(cc->req_pool);
+ mempool_destroy(cc->tag_pool);
if (cc->iv_gen_ops && cc->iv_gen_ops->dtr)
cc->iv_gen_ops->dtr(cc);
kzfree(cc->cipher);
kzfree(cc->cipher_string);
kzfree(cc->key_string);
+ kzfree(cc->cipher_auth);
+ kzfree(cc->authenc_key);
/* Must zero key material before freeing */
kzfree(cc);
return -EINVAL;
}
cc->key_parts = cc->tfms_count;
- cc->key_extra_size = 0;
cc->cipher = kstrdup(cipher, GFP_KERNEL);
if (!cc->cipher)
}
/* Initialize IV */
- cc->iv_size = crypto_skcipher_ivsize(any_tfm(cc));
+ if (crypt_integrity_mode(cc))
+ cc->iv_size = crypto_aead_ivsize(any_tfm_aead(cc));
+ else
+ cc->iv_size = crypto_skcipher_ivsize(any_tfm(cc));
+
+ if (crypt_integrity_hmac(cc)) {
+ cc->authenc_key = kmalloc(crypt_authenckey_size(cc), GFP_KERNEL);
+ if (!cc->authenc_key) {
+ ret = -ENOMEM;
+ ti->error = "Error allocating authenc key space";
+ goto bad;
+ }
+ }
+
if (cc->iv_size)
/* at least a 64 bit sector number should fit in our buffer */
cc->iv_size = max(cc->iv_size,
cc->iv_gen_ops = &crypt_iv_tcw_ops;
cc->key_parts += 2; /* IV + whitening */
cc->key_extra_size = cc->iv_size + TCW_WHITENING_SIZE;
+ } else if (strcmp(ivmode, "random") == 0) {
+ cc->iv_gen_ops = &crypt_iv_random_ops;
+ /* Need storage space in integrity fields. */
+ cc->integrity_iv_size = cc->iv_size;
} else {
ret = -EINVAL;
ti->error = "Invalid IV mode";
return -ENOMEM;
}
+static int crypt_ctr_optional(struct dm_target *ti, unsigned int argc, char **argv)
+{
+ struct crypt_config *cc = ti->private;
+ struct dm_arg_set as;
+ static struct dm_arg _args[] = {
+ {0, 3, "Invalid number of feature args"},
+ };
+ unsigned int opt_params, val;
+ const char *opt_string, *sval;
+ int ret;
+
+ /* Optional parameters */
+ as.argc = argc;
+ as.argv = argv;
+
+ ret = dm_read_arg_group(_args, &as, &opt_params, &ti->error);
+ if (ret)
+ return ret;
+
+ while (opt_params--) {
+ opt_string = dm_shift_arg(&as);
+ if (!opt_string) {
+ ti->error = "Not enough feature arguments";
+ return -EINVAL;
+ }
+
+ if (!strcasecmp(opt_string, "allow_discards"))
+ ti->num_discard_bios = 1;
+
+ else if (!strcasecmp(opt_string, "same_cpu_crypt"))
+ set_bit(DM_CRYPT_SAME_CPU, &cc->flags);
+
+ else if (!strcasecmp(opt_string, "submit_from_crypt_cpus"))
+ set_bit(DM_CRYPT_NO_OFFLOAD, &cc->flags);
+ else if (sscanf(opt_string, "integrity:%u:", &val) == 1) {
+ if (val == 0 || val > MAX_TAG_SIZE) {
+ ti->error = "Invalid integrity arguments";
+ return -EINVAL;
+ }
+ cc->on_disk_tag_size = val;
+ sval = strchr(opt_string + strlen("integrity:"), ':') + 1;
+ if (!strcasecmp(sval, "aead")) {
+ set_bit(CRYPT_MODE_INTEGRITY_AEAD, &cc->cipher_flags);
+ } else if (!strncasecmp(sval, "hmac(", strlen("hmac("))) {
+ struct crypto_ahash *hmac_tfm = crypto_alloc_ahash(sval, 0, 0);
+ if (IS_ERR(hmac_tfm)) {
+ ti->error = "Error initializing HMAC integrity hash.";
+ return PTR_ERR(hmac_tfm);
+ }
+ cc->key_mac_size = crypto_ahash_digestsize(hmac_tfm);
+ crypto_free_ahash(hmac_tfm);
+ set_bit(CRYPT_MODE_INTEGRITY_HMAC, &cc->cipher_flags);
+ } else if (strcasecmp(sval, "none")) {
+ ti->error = "Unknown integrity profile";
+ return -EINVAL;
+ }
+
+ cc->cipher_auth = kstrdup(sval, GFP_KERNEL);
+ if (!cc->cipher_auth)
+ return -ENOMEM;
+ } else {
+ ti->error = "Invalid feature arguments";
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
/*
* Construct an encryption mapping:
* <cipher> [<key>|:<key_size>:<user|logon>:<key_description>] <iv_offset> <dev_path> <start>
{
struct crypt_config *cc;
int key_size;
- unsigned int opt_params;
+ unsigned int align_mask;
unsigned long long tmpll;
int ret;
- size_t iv_size_padding;
- struct dm_arg_set as;
- const char *opt_string;
+ size_t iv_size_padding, additional_req_size;
char dummy;
- static struct dm_arg _args[] = {
- {0, 3, "Invalid number of feature args"},
- };
-
if (argc < 5) {
ti->error = "Not enough arguments";
return -EINVAL;
cc->key_size = key_size;
ti->private = cc;
+
+ /* Optional parameters need to be read before cipher constructor */
+ if (argc > 5) {
+ ret = crypt_ctr_optional(ti, argc - 5, &argv[5]);
+ if (ret)
+ goto bad;
+ }
+
ret = crypt_ctr_cipher(ti, argv[0], argv[1]);
if (ret < 0)
goto bad;
- cc->dmreq_start = sizeof(struct skcipher_request);
- cc->dmreq_start += crypto_skcipher_reqsize(any_tfm(cc));
+ if (crypt_integrity_mode(cc)) {
+ cc->dmreq_start = sizeof(struct aead_request);
+ cc->dmreq_start += crypto_aead_reqsize(any_tfm_aead(cc));
+ align_mask = crypto_aead_alignmask(any_tfm_aead(cc));
+ } else {
+ cc->dmreq_start = sizeof(struct skcipher_request);
+ cc->dmreq_start += crypto_skcipher_reqsize(any_tfm(cc));
+ align_mask = crypto_skcipher_alignmask(any_tfm(cc));
+ }
cc->dmreq_start = ALIGN(cc->dmreq_start, __alignof__(struct dm_crypt_request));
- if (crypto_skcipher_alignmask(any_tfm(cc)) < CRYPTO_MINALIGN) {
+ if (align_mask < CRYPTO_MINALIGN) {
/* Allocate the padding exactly */
iv_size_padding = -(cc->dmreq_start + sizeof(struct dm_crypt_request))
- & crypto_skcipher_alignmask(any_tfm(cc));
+ & align_mask;
} else {
/*
* If the cipher requires greater alignment than kmalloc
* alignment, we don't know the exact position of the
* initialization vector. We must assume worst case.
*/
- iv_size_padding = crypto_skcipher_alignmask(any_tfm(cc));
+ iv_size_padding = align_mask;
}
ret = -ENOMEM;
- cc->req_pool = mempool_create_kmalloc_pool(MIN_IOS, cc->dmreq_start +
- sizeof(struct dm_crypt_request) + iv_size_padding + cc->iv_size);
+
+ /* ...| IV + padding | original IV | original sec. number | bio tag offset | */
+ additional_req_size = sizeof(struct dm_crypt_request) +
+ iv_size_padding + cc->iv_size +
+ cc->iv_size +
+ sizeof(uint64_t) +
+ sizeof(unsigned int);
+
+ cc->req_pool = mempool_create_kmalloc_pool(MIN_IOS, cc->dmreq_start + additional_req_size);
if (!cc->req_pool) {
ti->error = "Cannot allocate crypt request mempool";
goto bad;
}
cc->per_bio_data_size = ti->per_io_data_size =
- ALIGN(sizeof(struct dm_crypt_io) + cc->dmreq_start +
- sizeof(struct dm_crypt_request) + iv_size_padding + cc->iv_size,
+ ALIGN(sizeof(struct dm_crypt_io) + cc->dmreq_start + additional_req_size,
ARCH_KMALLOC_MINALIGN);
cc->page_pool = mempool_create_page_pool(BIO_MAX_PAGES, 0);
}
cc->start = tmpll;
- argv += 5;
- argc -= 5;
-
- /* Optional parameters */
- if (argc) {
- as.argc = argc;
- as.argv = argv;
-
- ret = dm_read_arg_group(_args, &as, &opt_params, &ti->error);
+ if (crypt_integrity_mode(cc) || cc->integrity_iv_size) {
+ ret = crypt_integrity_ctr(cc, ti);
if (ret)
goto bad;
- ret = -EINVAL;
- while (opt_params--) {
- opt_string = dm_shift_arg(&as);
- if (!opt_string) {
- ti->error = "Not enough feature arguments";
- goto bad;
- }
-
- if (!strcasecmp(opt_string, "allow_discards"))
- ti->num_discard_bios = 1;
-
- else if (!strcasecmp(opt_string, "same_cpu_crypt"))
- set_bit(DM_CRYPT_SAME_CPU, &cc->flags);
+ cc->tag_pool_max_sectors = POOL_ENTRY_SIZE / cc->on_disk_tag_size;
+ if (!cc->tag_pool_max_sectors)
+ cc->tag_pool_max_sectors = 1;
- else if (!strcasecmp(opt_string, "submit_from_crypt_cpus"))
- set_bit(DM_CRYPT_NO_OFFLOAD, &cc->flags);
-
- else {
- ti->error = "Invalid feature arguments";
- goto bad;
- }
+ cc->tag_pool = mempool_create_kmalloc_pool(MIN_IOS,
+ cc->tag_pool_max_sectors * cc->on_disk_tag_size);
+ if (!cc->tag_pool) {
+ ti->error = "Cannot allocate integrity tags mempool";
+ goto bad;
}
}
* Check if bio is too large, split as needed.
*/
if (unlikely(bio->bi_iter.bi_size > (BIO_MAX_PAGES << PAGE_SHIFT)) &&
- bio_data_dir(bio) == WRITE)
+ (bio_data_dir(bio) == WRITE || cc->on_disk_tag_size))
dm_accept_partial_bio(bio, ((BIO_MAX_PAGES << PAGE_SHIFT) >> SECTOR_SHIFT));
io = dm_per_bio_data(bio, cc->per_bio_data_size);
crypt_io_init(io, cc, bio, dm_target_offset(ti, bio->bi_iter.bi_sector));
- io->ctx.req = (struct skcipher_request *)(io + 1);
+
+ if (cc->on_disk_tag_size) {
+ unsigned tag_len = cc->on_disk_tag_size * bio_sectors(bio);
+
+ if (unlikely(tag_len > KMALLOC_MAX_SIZE) ||
+ unlikely(!(io->integrity_metadata = kmalloc(tag_len,
+ GFP_NOIO | __GFP_NORETRY | __GFP_NOMEMALLOC | __GFP_NOWARN)))) {
+ if (bio_sectors(bio) > cc->tag_pool_max_sectors)
+ dm_accept_partial_bio(bio, cc->tag_pool_max_sectors);
+ io->integrity_metadata = mempool_alloc(cc->tag_pool, GFP_NOIO);
+ io->integrity_metadata_from_pool = true;
+ }
+ }
+
+ if (crypt_integrity_mode(cc))
+ io->ctx.r.req_aead = (struct aead_request *)(io + 1);
+ else
+ io->ctx.r.req = (struct skcipher_request *)(io + 1);
if (bio_data_dir(io->base_bio) == READ) {
if (kcryptd_io_read(io, GFP_NOWAIT))
num_feature_args += !!ti->num_discard_bios;
num_feature_args += test_bit(DM_CRYPT_SAME_CPU, &cc->flags);
num_feature_args += test_bit(DM_CRYPT_NO_OFFLOAD, &cc->flags);
+ if (cc->on_disk_tag_size)
+ num_feature_args++;
if (num_feature_args) {
DMEMIT(" %d", num_feature_args);
if (ti->num_discard_bios)
DMEMIT(" same_cpu_crypt");
if (test_bit(DM_CRYPT_NO_OFFLOAD, &cc->flags))
DMEMIT(" submit_from_crypt_cpus");
+ if (cc->on_disk_tag_size)
+ DMEMIT(" integrity:%u:%s", cc->on_disk_tag_size, cc->cipher_auth);
}
break;
static struct target_type crypt_target = {
.name = "crypt",
- .version = {1, 15, 0},
+ .version = {1, 16, 0},
.module = THIS_MODULE,
.ctr = crypt_ctr,
.dtr = crypt_dtr,
projects / kernel.git / commitdiff