2 * libdevmapper - device-mapper backend for cryptsetup
4 * Copyright (C) 2004, Christophe Saout <christophe@saout.de>
5 * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
6 * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 /* device-mapper library helpers */
30 struct crypt_params_verity;
32 /* Device mapper backend - kernel support flags */
33 #define DM_KEY_WIPE_SUPPORTED (1 << 0) /* key wipe message */
34 #define DM_LMK_SUPPORTED (1 << 1) /* lmk mode */
35 #define DM_SECURE_SUPPORTED (1 << 2) /* wipe (secure) buffer flag */
36 #define DM_PLAIN64_SUPPORTED (1 << 3) /* plain64 IV */
37 #define DM_DISCARDS_SUPPORTED (1 << 4) /* discards/TRIM option is supported */
38 #define DM_VERITY_SUPPORTED (1 << 5) /* dm-verity target supported */
39 uint32_t dm_flags(void);
41 #define DM_ACTIVE_DEVICE (1 << 0)
42 #define DM_ACTIVE_CIPHER (1 << 1)
43 #define DM_ACTIVE_UUID (1 << 2)
44 #define DM_ACTIVE_KEYSIZE (1 << 3)
45 #define DM_ACTIVE_KEY (1 << 4)
47 struct crypt_dm_active_device {
48 enum { DM_CRYPT = 0, DM_VERITY } target;
49 uint64_t size; /* active device size */
50 uint32_t flags; /* activation flags */
57 /* Active key for device */
58 struct volume_key *vk;
60 /* struct crypt_active_device */
61 uint64_t offset; /* offset in sectors */
62 uint64_t iv_offset; /* IV initilisation sector */
65 const char *data_device;
66 const char *hash_device;
68 const char *root_hash;
69 size_t root_hash_size;
71 uint64_t hash_offset; /* hash offset (not header) */
76 struct crypt_dm_active_verity {
77 const char *data_device;
78 const char *hash_device;
80 const char *root_hash;
81 size_t root_hash_size;
83 uint64_t hash_offset; /* hash offset (not header) */
84 uint64_t size; /* active device size */
85 uint32_t flags; /* activation flags */
88 const char *dm_get_dir(void);
89 int dm_init(struct crypt_device *context, int check_kernel);
91 int dm_remove_device(const char *name, int force, uint64_t size);
92 int dm_status_device(const char *name);
93 int dm_status_suspended(const char *name);
94 int dm_status_verity_ok(const char *name);
95 int dm_query_device(const char *name, uint32_t get_flags,
96 struct crypt_dm_active_device *dmd);
97 int dm_query_verity(const char *name,
98 struct crypt_dm_active_verity *dmd);
99 int dm_create_device(const char *name,
101 struct crypt_dm_active_device *dmd,
103 int dm_create_verity(const char *name,
104 struct crypt_params_verity *params,
105 struct crypt_dm_active_verity *dmd);
106 int dm_suspend_and_wipe_key(const char *name);
107 int dm_resume_and_reinstate_key(const char *name,
110 char *dm_device_path(const char *prefix, int major, int minor);
111 int dm_is_dm_device(int major, int minor);
112 int dm_is_dm_kernel_name(const char *name);
113 int dm_check_segment(const char *name, uint64_t offset, uint64_t size);
115 #endif /* _UTILS_DM_H */