173 				  struct fscrypt_master_key *mk,  in setup_per_mode_enc_key()  argument
210 	err = fscrypt_hkdf_expand(&mk->mk_secret.hkdf,  in setup_per_mode_enc_key()
235 static int fscrypt_derive_siphash_key(const struct fscrypt_master_key *mk,  in fscrypt_derive_siphash_key()  argument
241 	err = fscrypt_hkdf_expand(&mk->mk_secret.hkdf, context, info, infolen,  in fscrypt_derive_siphash_key()
254 			       const struct fscrypt_master_key *mk)  in fscrypt_derive_dirhash_key()  argument
258 	err = fscrypt_derive_siphash_key(mk, HKDF_CONTEXT_DIRHASH_KEY,  in fscrypt_derive_dirhash_key()
268 			       const struct fscrypt_master_key *mk)  in fscrypt_hash_inode_number()  argument
271 	WARN_ON(!mk->mk_ino_hash_key_initialized);  in fscrypt_hash_inode_number()
274 					      &mk->mk_ino_hash_key);  in fscrypt_hash_inode_number()
278 					    struct fscrypt_master_key *mk)  in fscrypt_setup_iv_ino_lblk_32_key()  argument
282 	err = setup_per_mode_enc_key(ci, mk, mk->mk_iv_ino_lblk_32_keys,  in fscrypt_setup_iv_ino_lblk_32_key()
288 	if (!smp_load_acquire(&mk->mk_ino_hash_key_initialized)) {  in fscrypt_setup_iv_ino_lblk_32_key()
292 		if (mk->mk_ino_hash_key_initialized)  in fscrypt_setup_iv_ino_lblk_32_key()
295 		err = fscrypt_derive_siphash_key(mk,  in fscrypt_setup_iv_ino_lblk_32_key()
297 						 NULL, 0, &mk->mk_ino_hash_key);  in fscrypt_setup_iv_ino_lblk_32_key()
301 		smp_store_release(&mk->mk_ino_hash_key_initialized, true);  in fscrypt_setup_iv_ino_lblk_32_key()
313 		fscrypt_hash_inode_number(ci, mk);  in fscrypt_setup_iv_ino_lblk_32_key()
318 				     struct fscrypt_master_key *mk,  in fscrypt_setup_v2_file_key()  argument
332 		err = setup_per_mode_enc_key(ci, mk, mk->mk_direct_keys,  in fscrypt_setup_v2_file_key()
342 		err = setup_per_mode_enc_key(ci, mk, mk->mk_iv_ino_lblk_64_keys,  in fscrypt_setup_v2_file_key()
347 		err = fscrypt_setup_iv_ino_lblk_32_key(ci, mk);  in fscrypt_setup_v2_file_key()
351 		err = fscrypt_hkdf_expand(&mk->mk_secret.hkdf,  in fscrypt_setup_v2_file_key()
366 		err = fscrypt_derive_dirhash_key(ci, mk);  in fscrypt_setup_v2_file_key()
391 static bool fscrypt_valid_master_key_size(const struct fscrypt_master_key *mk,  in fscrypt_valid_master_key_size()  argument
401 	if (mk->mk_secret.size < min_keysize) {  in fscrypt_valid_master_key_size()
404 			     master_key_spec_type(&mk->mk_spec),  in fscrypt_valid_master_key_size()
405 			     master_key_spec_len(&mk->mk_spec),  in fscrypt_valid_master_key_size()
406 			     (u8 *)&mk->mk_spec.u,  in fscrypt_valid_master_key_size()
407 			     mk->mk_secret.size, min_keysize);  in fscrypt_valid_master_key_size()
427 	struct fscrypt_master_key *mk;  in setup_file_encryption_key()  local
438 	mk = fscrypt_find_master_key(ci->ci_inode->i_sb, &mk_spec);  in setup_file_encryption_key()
439 	if (!mk) {  in setup_file_encryption_key()
451 	down_read(&mk->mk_sem);  in setup_file_encryption_key()
454 	if (!is_master_key_secret_present(&mk->mk_secret)) {  in setup_file_encryption_key()
459 	if (!fscrypt_valid_master_key_size(mk, ci)) {  in setup_file_encryption_key()
466 		err = fscrypt_setup_v1_file_key(ci, mk->mk_secret.raw);  in setup_file_encryption_key()
469 		err = fscrypt_setup_v2_file_key(ci, mk, need_dirhash_key);  in setup_file_encryption_key()
479 	*mk_ret = mk;  in setup_file_encryption_key()
483 	up_read(&mk->mk_sem);  in setup_file_encryption_key()
484 	fscrypt_put_master_key(mk);  in setup_file_encryption_key()
490 	struct fscrypt_master_key *mk;  in put_crypt_info()  local
501 	mk = ci->ci_master_key;  in put_crypt_info()
502 	if (mk) {  in put_crypt_info()
509 		spin_lock(&mk->mk_decrypted_inodes_lock);  in put_crypt_info()
511 		spin_unlock(&mk->mk_decrypted_inodes_lock);  in put_crypt_info()
512 		fscrypt_put_master_key_activeref(mk);  in put_crypt_info()
526 	struct fscrypt_master_key *mk = NULL;  in fscrypt_setup_encryption_info()  local
549 	res = setup_file_encryption_key(crypt_info, need_dirhash_key, &mk);  in fscrypt_setup_encryption_info()
564 		if (mk) {  in fscrypt_setup_encryption_info()
565 			crypt_info->ci_master_key = mk;  in fscrypt_setup_encryption_info()
566 			refcount_inc(&mk->mk_active_refs);  in fscrypt_setup_encryption_info()
567 			spin_lock(&mk->mk_decrypted_inodes_lock);  in fscrypt_setup_encryption_info()
569 				 &mk->mk_decrypted_inodes);  in fscrypt_setup_encryption_info()
570 			spin_unlock(&mk->mk_decrypted_inodes_lock);  in fscrypt_setup_encryption_info()
576 	if (mk) {  in fscrypt_setup_encryption_info()
577 		up_read(&mk->mk_sem);  in fscrypt_setup_encryption_info()
578 		fscrypt_put_master_key(mk);  in fscrypt_setup_encryption_info()