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Diffstat (limited to 'include/linux/keyslot-manager.h')
-rw-r--r-- | include/linux/keyslot-manager.h | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/include/linux/keyslot-manager.h b/include/linux/keyslot-manager.h deleted file mode 100644 index a27605e2f826..000000000000 --- a/include/linux/keyslot-manager.h +++ /dev/null @@ -1,120 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Copyright 2019 Google LLC - */ - -#ifndef __LINUX_KEYSLOT_MANAGER_H -#define __LINUX_KEYSLOT_MANAGER_H - -#include <linux/bio.h> -#include <linux/blk-crypto.h> - -struct blk_keyslot_manager; - -/** - * struct blk_ksm_ll_ops - functions to manage keyslots in hardware - * @keyslot_program: Program the specified key into the specified slot in the - * inline encryption hardware. - * @keyslot_evict: Evict key from the specified keyslot in the hardware. - * The key is provided so that e.g. dm layers can evict - * keys from the devices that they map over. - * Returns 0 on success, -errno otherwise. - * - * This structure should be provided by storage device drivers when they set up - * a keyslot manager - this structure holds the function ptrs that the keyslot - * manager will use to manipulate keyslots in the hardware. - */ -struct blk_ksm_ll_ops { - int (*keyslot_program)(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - unsigned int slot); - int (*keyslot_evict)(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - unsigned int slot); -}; - -struct blk_keyslot_manager { - /* - * The struct blk_ksm_ll_ops that this keyslot manager will use - * to perform operations like programming and evicting keys on the - * device - */ - struct blk_ksm_ll_ops ksm_ll_ops; - - /* - * The maximum number of bytes supported for specifying the data unit - * number. - */ - unsigned int max_dun_bytes_supported; - - /* - * Array of size BLK_ENCRYPTION_MODE_MAX of bitmasks that represents - * whether a crypto mode and data unit size are supported. The i'th - * bit of crypto_mode_supported[crypto_mode] is set iff a data unit - * size of (1 << i) is supported. We only support data unit sizes - * that are powers of 2. - */ - unsigned int crypto_modes_supported[BLK_ENCRYPTION_MODE_MAX]; - - /* Device for runtime power management (NULL if none) */ - struct device *dev; - - /* Here onwards are *private* fields for internal keyslot manager use */ - - unsigned int num_slots; - - /* Protects programming and evicting keys from the device */ - struct rw_semaphore lock; - - /* List of idle slots, with least recently used slot at front */ - wait_queue_head_t idle_slots_wait_queue; - struct list_head idle_slots; - spinlock_t idle_slots_lock; - - /* - * Hash table which maps struct *blk_crypto_key to keyslots, so that we - * can find a key's keyslot in O(1) time rather than O(num_slots). - * Protected by 'lock'. - */ - struct hlist_head *slot_hashtable; - unsigned int log_slot_ht_size; - - /* Per-keyslot data */ - struct blk_ksm_keyslot *slots; -}; - -int blk_ksm_init(struct blk_keyslot_manager *ksm, unsigned int num_slots); - -int devm_blk_ksm_init(struct device *dev, struct blk_keyslot_manager *ksm, - unsigned int num_slots); - -blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key, - struct blk_ksm_keyslot **slot_ptr); - -unsigned int blk_ksm_get_slot_idx(struct blk_ksm_keyslot *slot); - -void blk_ksm_put_slot(struct blk_ksm_keyslot *slot); - -bool blk_ksm_crypto_cfg_supported(struct blk_keyslot_manager *ksm, - const struct blk_crypto_config *cfg); - -int blk_ksm_evict_key(struct blk_keyslot_manager *ksm, - const struct blk_crypto_key *key); - -void blk_ksm_reprogram_all_keys(struct blk_keyslot_manager *ksm); - -void blk_ksm_destroy(struct blk_keyslot_manager *ksm); - -void blk_ksm_intersect_modes(struct blk_keyslot_manager *parent, - const struct blk_keyslot_manager *child); - -void blk_ksm_init_passthrough(struct blk_keyslot_manager *ksm); - -bool blk_ksm_is_superset(struct blk_keyslot_manager *ksm_superset, - struct blk_keyslot_manager *ksm_subset); - -void blk_ksm_update_capabilities(struct blk_keyslot_manager *target_ksm, - struct blk_keyslot_manager *reference_ksm); - -#endif /* __LINUX_KEYSLOT_MANAGER_H */ |