Lines Matching refs:v
88 struct dm_verity *v; member
114 struct dm_verity *v; member
119 static struct shash_desc *io_hash_desc(struct dm_verity *v, struct dm_verity_io *io) in io_hash_desc() argument
124 static u8 *io_real_digest(struct dm_verity *v, struct dm_verity_io *io) in io_real_digest() argument
126 return (u8 *)(io + 1) + v->shash_descsize; in io_real_digest()
129 static u8 *io_want_digest(struct dm_verity *v, struct dm_verity_io *io) in io_want_digest() argument
131 return (u8 *)(io + 1) + v->shash_descsize + v->digest_size; in io_want_digest()
163 static sector_t verity_map_sector(struct dm_verity *v, sector_t bi_sector) in verity_map_sector() argument
165 return v->data_start + dm_target_offset(v->ti, bi_sector); in verity_map_sector()
174 static sector_t verity_position_at_level(struct dm_verity *v, sector_t block, in verity_position_at_level() argument
177 return block >> (level * v->hash_per_block_bits); in verity_position_at_level()
180 static void verity_hash_at_level(struct dm_verity *v, sector_t block, int level, in verity_hash_at_level() argument
183 sector_t position = verity_position_at_level(v, block, level); in verity_hash_at_level()
186 *hash_block = v->hash_level_block[level] + (position >> v->hash_per_block_bits); in verity_hash_at_level()
191 idx = position & ((1 << v->hash_per_block_bits) - 1); in verity_hash_at_level()
192 if (!v->version) in verity_hash_at_level()
193 *offset = idx * v->digest_size; in verity_hash_at_level()
195 *offset = idx << (v->hash_dev_block_bits - v->hash_per_block_bits); in verity_hash_at_level()
201 static int verity_handle_err(struct dm_verity *v, enum verity_block_type type, in verity_handle_err() argument
207 struct mapped_device *md = dm_table_get_md(v->ti->table); in verity_handle_err()
210 v->hash_failed = 1; in verity_handle_err()
212 if (v->corrupted_errs >= DM_VERITY_MAX_CORRUPTED_ERRS) in verity_handle_err()
215 v->corrupted_errs++; in verity_handle_err()
228 DMERR("%s: %s block %llu is corrupted", v->data_dev->name, type_str, in verity_handle_err()
231 if (v->corrupted_errs == DM_VERITY_MAX_CORRUPTED_ERRS) in verity_handle_err()
232 DMERR("%s: reached maximum errors", v->data_dev->name); in verity_handle_err()
240 if (v->mode == DM_VERITY_MODE_LOGGING) in verity_handle_err()
243 if (v->mode == DM_VERITY_MODE_RESTART) in verity_handle_err()
263 struct dm_verity *v = io->v; in verity_verify_level() local
271 verity_hash_at_level(v, block, level, &hash_block, &offset); in verity_verify_level()
273 data = dm_bufio_read(v->bufio, hash_block, &buf); in verity_verify_level()
288 desc = io_hash_desc(v, io); in verity_verify_level()
289 desc->tfm = v->tfm; in verity_verify_level()
297 if (likely(v->version >= 1)) { in verity_verify_level()
298 r = crypto_shash_update(desc, v->salt, v->salt_size); in verity_verify_level()
305 r = crypto_shash_update(desc, data, 1 << v->hash_dev_block_bits); in verity_verify_level()
311 if (!v->version) { in verity_verify_level()
312 r = crypto_shash_update(desc, v->salt, v->salt_size); in verity_verify_level()
319 result = io_real_digest(v, io); in verity_verify_level()
325 if (unlikely(memcmp(result, io_want_digest(v, io), v->digest_size))) { in verity_verify_level()
326 if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_METADATA, in verity_verify_level()
337 memcpy(io_want_digest(v, io), data, v->digest_size); in verity_verify_level()
353 struct dm_verity *v = io->v; in verity_verify_io() local
355 v->ti->per_bio_data_size); in verity_verify_io()
365 if (likely(v->levels)) { in verity_verify_io()
380 memcpy(io_want_digest(v, io), v->root_digest, v->digest_size); in verity_verify_io()
382 for (i = v->levels - 1; i >= 0; i--) { in verity_verify_io()
389 desc = io_hash_desc(v, io); in verity_verify_io()
390 desc->tfm = v->tfm; in verity_verify_io()
398 if (likely(v->version >= 1)) { in verity_verify_io()
399 r = crypto_shash_update(desc, v->salt, v->salt_size); in verity_verify_io()
405 todo = 1 << v->data_dev_block_bits; in verity_verify_io()
427 if (!v->version) { in verity_verify_io()
428 r = crypto_shash_update(desc, v->salt, v->salt_size); in verity_verify_io()
435 result = io_real_digest(v, io); in verity_verify_io()
441 if (unlikely(memcmp(result, io_want_digest(v, io), v->digest_size))) { in verity_verify_io()
442 if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_DATA, in verity_verify_io()
456 struct dm_verity *v = io->v; in verity_finish_io() local
457 struct bio *bio = dm_bio_from_per_bio_data(io, v->ti->per_bio_data_size); in verity_finish_io()
482 queue_work(io->v->verify_wq, &io->work); in verity_end_io()
494 struct dm_verity *v = pw->v; in verity_prefetch_io() local
497 for (i = v->levels - 2; i >= 0; i--) { in verity_prefetch_io()
500 verity_hash_at_level(v, pw->block, i, &hash_block_start, NULL); in verity_prefetch_io()
501 verity_hash_at_level(v, pw->block + pw->n_blocks - 1, i, &hash_block_end, NULL); in verity_prefetch_io()
505 cluster >>= v->data_dev_block_bits; in verity_prefetch_io()
514 if (unlikely(hash_block_end >= v->hash_blocks)) in verity_prefetch_io()
515 hash_block_end = v->hash_blocks - 1; in verity_prefetch_io()
518 dm_bufio_prefetch(v->bufio, hash_block_start, in verity_prefetch_io()
525 static void verity_submit_prefetch(struct dm_verity *v, struct dm_verity_io *io) in verity_submit_prefetch() argument
536 pw->v = v; in verity_submit_prefetch()
539 queue_work(v->verify_wq, &pw->work); in verity_submit_prefetch()
548 struct dm_verity *v = ti->private; in verity_map() local
551 bio->bi_bdev = v->data_dev->bdev; in verity_map()
552 bio->bi_iter.bi_sector = verity_map_sector(v, bio->bi_iter.bi_sector); in verity_map()
555 ((1 << (v->data_dev_block_bits - SECTOR_SHIFT)) - 1)) { in verity_map()
561 (v->data_dev_block_bits - SECTOR_SHIFT) > v->data_blocks) { in verity_map()
570 io->v = v; in verity_map()
573 io->block = bio->bi_iter.bi_sector >> (v->data_dev_block_bits - SECTOR_SHIFT); in verity_map()
574 io->n_blocks = bio->bi_iter.bi_size >> v->data_dev_block_bits; in verity_map()
580 verity_submit_prefetch(v, io); in verity_map()
593 struct dm_verity *v = ti->private; in verity_status() local
599 DMEMIT("%c", v->hash_failed ? 'C' : 'V'); in verity_status()
603 v->version, in verity_status()
604 v->data_dev->name, in verity_status()
605 v->hash_dev->name, in verity_status()
606 1 << v->data_dev_block_bits, in verity_status()
607 1 << v->hash_dev_block_bits, in verity_status()
608 (unsigned long long)v->data_blocks, in verity_status()
609 (unsigned long long)v->hash_start, in verity_status()
610 v->alg_name in verity_status()
612 for (x = 0; x < v->digest_size; x++) in verity_status()
613 DMEMIT("%02x", v->root_digest[x]); in verity_status()
615 if (!v->salt_size) in verity_status()
618 for (x = 0; x < v->salt_size; x++) in verity_status()
619 DMEMIT("%02x", v->salt[x]); in verity_status()
620 if (v->mode != DM_VERITY_MODE_EIO) { in verity_status()
622 switch (v->mode) { in verity_status()
640 struct dm_verity *v = ti->private; in verity_ioctl() local
643 if (v->data_start || in verity_ioctl()
644 ti->len != i_size_read(v->data_dev->bdev->bd_inode) >> SECTOR_SHIFT) in verity_ioctl()
647 return r ? : __blkdev_driver_ioctl(v->data_dev->bdev, v->data_dev->mode, in verity_ioctl()
654 struct dm_verity *v = ti->private; in verity_merge() local
655 struct request_queue *q = bdev_get_queue(v->data_dev->bdev); in verity_merge()
660 bvm->bi_bdev = v->data_dev->bdev; in verity_merge()
661 bvm->bi_sector = verity_map_sector(v, bvm->bi_sector); in verity_merge()
669 struct dm_verity *v = ti->private; in verity_iterate_devices() local
671 return fn(ti, v->data_dev, v->data_start, ti->len, data); in verity_iterate_devices()
676 struct dm_verity *v = ti->private; in verity_io_hints() local
678 if (limits->logical_block_size < 1 << v->data_dev_block_bits) in verity_io_hints()
679 limits->logical_block_size = 1 << v->data_dev_block_bits; in verity_io_hints()
681 if (limits->physical_block_size < 1 << v->data_dev_block_bits) in verity_io_hints()
682 limits->physical_block_size = 1 << v->data_dev_block_bits; in verity_io_hints()
689 struct dm_verity *v = ti->private; in verity_dtr() local
691 if (v->verify_wq) in verity_dtr()
692 destroy_workqueue(v->verify_wq); in verity_dtr()
694 if (v->vec_mempool) in verity_dtr()
695 mempool_destroy(v->vec_mempool); in verity_dtr()
697 if (v->bufio) in verity_dtr()
698 dm_bufio_client_destroy(v->bufio); in verity_dtr()
700 kfree(v->salt); in verity_dtr()
701 kfree(v->root_digest); in verity_dtr()
703 if (v->tfm) in verity_dtr()
704 crypto_free_shash(v->tfm); in verity_dtr()
706 kfree(v->alg_name); in verity_dtr()
708 if (v->hash_dev) in verity_dtr()
709 dm_put_device(ti, v->hash_dev); in verity_dtr()
711 if (v->data_dev) in verity_dtr()
712 dm_put_device(ti, v->data_dev); in verity_dtr()
714 kfree(v); in verity_dtr()
733 struct dm_verity *v; in verity_ctr() local
747 v = kzalloc(sizeof(struct dm_verity), GFP_KERNEL); in verity_ctr()
748 if (!v) { in verity_ctr()
752 ti->private = v; in verity_ctr()
753 v->ti = ti; in verity_ctr()
773 v->version = num; in verity_ctr()
775 r = dm_get_device(ti, argv[1], FMODE_READ, &v->data_dev); in verity_ctr()
781 r = dm_get_device(ti, argv[2], FMODE_READ, &v->hash_dev); in verity_ctr()
789 num < bdev_logical_block_size(v->data_dev->bdev) || in verity_ctr()
795 v->data_dev_block_bits = __ffs(num); in verity_ctr()
799 num < bdev_logical_block_size(v->hash_dev->bdev) || in verity_ctr()
805 v->hash_dev_block_bits = __ffs(num); in verity_ctr()
808 (sector_t)(num_ll << (v->data_dev_block_bits - SECTOR_SHIFT)) in verity_ctr()
809 >> (v->data_dev_block_bits - SECTOR_SHIFT) != num_ll) { in verity_ctr()
814 v->data_blocks = num_ll; in verity_ctr()
816 if (ti->len > (v->data_blocks << (v->data_dev_block_bits - SECTOR_SHIFT))) { in verity_ctr()
823 (sector_t)(num_ll << (v->hash_dev_block_bits - SECTOR_SHIFT)) in verity_ctr()
824 >> (v->hash_dev_block_bits - SECTOR_SHIFT) != num_ll) { in verity_ctr()
829 v->hash_start = num_ll; in verity_ctr()
831 v->alg_name = kstrdup(argv[7], GFP_KERNEL); in verity_ctr()
832 if (!v->alg_name) { in verity_ctr()
838 v->tfm = crypto_alloc_shash(v->alg_name, 0, 0); in verity_ctr()
839 if (IS_ERR(v->tfm)) { in verity_ctr()
841 r = PTR_ERR(v->tfm); in verity_ctr()
842 v->tfm = NULL; in verity_ctr()
845 v->digest_size = crypto_shash_digestsize(v->tfm); in verity_ctr()
846 if ((1 << v->hash_dev_block_bits) < v->digest_size * 2) { in verity_ctr()
851 v->shash_descsize = in verity_ctr()
852 sizeof(struct shash_desc) + crypto_shash_descsize(v->tfm); in verity_ctr()
854 v->root_digest = kmalloc(v->digest_size, GFP_KERNEL); in verity_ctr()
855 if (!v->root_digest) { in verity_ctr()
860 if (strlen(argv[8]) != v->digest_size * 2 || in verity_ctr()
861 hex2bin(v->root_digest, argv[8], v->digest_size)) { in verity_ctr()
868 v->salt_size = strlen(argv[9]) / 2; in verity_ctr()
869 v->salt = kmalloc(v->salt_size, GFP_KERNEL); in verity_ctr()
870 if (!v->salt) { in verity_ctr()
875 if (strlen(argv[9]) != v->salt_size * 2 || in verity_ctr()
876 hex2bin(v->salt, argv[9], v->salt_size)) { in verity_ctr()
905 v->mode = DM_VERITY_MODE_LOGGING; in verity_ctr()
907 v->mode = DM_VERITY_MODE_RESTART; in verity_ctr()
916 v->hash_per_block_bits = in verity_ctr()
917 __fls((1 << v->hash_dev_block_bits) / v->digest_size); in verity_ctr()
919 v->levels = 0; in verity_ctr()
920 if (v->data_blocks) in verity_ctr()
921 while (v->hash_per_block_bits * v->levels < 64 && in verity_ctr()
922 (unsigned long long)(v->data_blocks - 1) >> in verity_ctr()
923 (v->hash_per_block_bits * v->levels)) in verity_ctr()
924 v->levels++; in verity_ctr()
926 if (v->levels > DM_VERITY_MAX_LEVELS) { in verity_ctr()
932 hash_position = v->hash_start; in verity_ctr()
933 for (i = v->levels - 1; i >= 0; i--) { in verity_ctr()
935 v->hash_level_block[i] = hash_position; in verity_ctr()
936 s = (v->data_blocks + ((sector_t)1 << ((i + 1) * v->hash_per_block_bits)) - 1) in verity_ctr()
937 >> ((i + 1) * v->hash_per_block_bits); in verity_ctr()
945 v->hash_blocks = hash_position; in verity_ctr()
947 v->bufio = dm_bufio_client_create(v->hash_dev->bdev, in verity_ctr()
948 1 << v->hash_dev_block_bits, 1, sizeof(struct buffer_aux), in verity_ctr()
950 if (IS_ERR(v->bufio)) { in verity_ctr()
952 r = PTR_ERR(v->bufio); in verity_ctr()
953 v->bufio = NULL; in verity_ctr()
957 if (dm_bufio_get_device_size(v->bufio) < v->hash_blocks) { in verity_ctr()
963 …ti->per_bio_data_size = roundup(sizeof(struct dm_verity_io) + v->shash_descsize + v->digest_size *… in verity_ctr()
965 v->vec_mempool = mempool_create_kmalloc_pool(DM_VERITY_MEMPOOL_SIZE, in verity_ctr()
967 if (!v->vec_mempool) { in verity_ctr()
974 …v->verify_wq = alloc_workqueue("kverityd", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND, num_onl… in verity_ctr()
975 if (!v->verify_wq) { in verity_ctr()