diff options
| -rw-r--r-- | block/blk-crypto.c | 1 | ||||
| -rw-r--r-- | drivers/md/dm-table.c | 53 |
2 files changed, 54 insertions, 0 deletions
diff --git a/block/blk-crypto.c b/block/blk-crypto.c index 09fcb18fa778..c5bdaafffa29 100644 --- a/block/blk-crypto.c +++ b/block/blk-crypto.c @@ -409,3 +409,4 @@ int blk_crypto_evict_key(struct request_queue *q, */ return blk_crypto_fallback_evict_key(key); } +EXPORT_SYMBOL_GPL(blk_crypto_evict_key); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 8c4ed3ec9409..95391f78b8d5 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1214,6 +1214,58 @@ struct dm_keyslot_manager { struct mapped_device *md; }; +struct dm_keyslot_evict_args { + const struct blk_crypto_key *key; + int err; +}; + +static int dm_keyslot_evict_callback(struct dm_target *ti, struct dm_dev *dev, + sector_t start, sector_t len, void *data) +{ + struct dm_keyslot_evict_args *args = data; + int err; + + err = blk_crypto_evict_key(bdev_get_queue(dev->bdev), args->key); + if (!args->err) + args->err = err; + /* Always try to evict the key from all devices. */ + return 0; +} + +/* + * When an inline encryption key is evicted from a device-mapper device, evict + * it from all the underlying devices. + */ +static int dm_keyslot_evict(struct blk_keyslot_manager *ksm, + const struct blk_crypto_key *key, unsigned int slot) +{ + struct dm_keyslot_manager *dksm = container_of(ksm, + struct dm_keyslot_manager, + ksm); + struct mapped_device *md = dksm->md; + struct dm_keyslot_evict_args args = { key }; + struct dm_table *t; + int srcu_idx; + int i; + struct dm_target *ti; + + t = dm_get_live_table(md, &srcu_idx); + if (!t) + return 0; + for (i = 0; i < dm_table_get_num_targets(t); i++) { + ti = dm_table_get_target(t, i); + if (!ti->type->iterate_devices) + continue; + ti->type->iterate_devices(ti, dm_keyslot_evict_callback, &args); + } + dm_put_live_table(md, srcu_idx); + return args.err; +} + +static struct blk_ksm_ll_ops dm_ksm_ll_ops = { + .keyslot_evict = dm_keyslot_evict, +}; + static int device_intersect_crypto_modes(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) @@ -1270,6 +1322,7 @@ static int dm_table_construct_keyslot_manager(struct dm_table *t) ksm = &dksm->ksm; blk_ksm_init_passthrough(ksm); + ksm->ksm_ll_ops = dm_ksm_ll_ops; ksm->max_dun_bytes_supported = UINT_MAX; memset(ksm->crypto_modes_supported, 0xFF, sizeof(ksm->crypto_modes_supported)); |