Add copyright line for files I have written or modified.

[platform/upstream/cryptsetup.git] / lib / utils_dm.h

diff --git a/lib/utils_dm.h b/lib/utils_dm.h
index c954ff0..8af91e8 100644 (file)
--- a/lib/utils_dm.h
+++ b/lib/utils_dm.h
@@ -1,3 +1,25 @@
+/*
+ * libdevmapper - device-mapper backend for cryptsetup
+ *
+ * Copyright (C) 2004, Christophe Saout <christophe@saout.de>
+ * Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
+ * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2012, Milan Broz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
 #ifndef _UTILS_DM_H
 #define _UTILS_DM_H
 
@@ -6,6 +28,8 @@
 
 struct crypt_device;
 struct volume_key;
+struct crypt_params_verity;
+struct device;
 
 /* Device mapper backend - kernel support flags */
 #define DM_KEY_WIPE_SUPPORTED (1 << 0) /* key wipe message */
@@ -13,53 +37,66 @@ struct volume_key;
 #define DM_SECURE_SUPPORTED   (1 << 2) /* wipe (secure) buffer flag */
 #define DM_PLAIN64_SUPPORTED  (1 << 3) /* plain64 IV */
 #define DM_DISCARDS_SUPPORTED (1 << 4) /* discards/TRIM option is supported */
+#define DM_VERITY_SUPPORTED   (1 << 5) /* dm-verity target supported */
 uint32_t dm_flags(void);
 
 #define DM_ACTIVE_DEVICE       (1 << 0)
-#define DM_ACTIVE_CIPHER       (1 << 1)
-#define DM_ACTIVE_UUID         (1 << 2)
-#define DM_ACTIVE_KEY          (1 << 3)
+#define DM_ACTIVE_UUID         (1 << 1)
+
+#define DM_ACTIVE_CRYPT_CIPHER (1 << 2)
+#define DM_ACTIVE_CRYPT_KEYSIZE        (1 << 3)
+#define DM_ACTIVE_CRYPT_KEY    (1 << 4)
 
-#define DM_ACTIVE_ALL ( \
-       DM_ACTIVE_DEVICE | \
-       DM_ACTIVE_CIPHER | \
-       DM_ACTIVE_UUID | \
-       DM_ACTIVE_KEY)
+#define DM_ACTIVE_VERITY_ROOT_HASH     (1 << 5)
+#define DM_ACTIVE_VERITY_HASH_DEVICE   (1 << 6)
+#define DM_ACTIVE_VERITY_PARAMS                (1 << 7)
 
 struct crypt_dm_active_device {
-       const char *device;
-       const char *cipher;
+       enum { DM_CRYPT = 0, DM_VERITY } target;
+       uint64_t size;          /* active device size */
+       uint32_t flags;         /* activation flags */
        const char *uuid;
+       struct device *data_device;
+       union {
+       struct {
+               const char *cipher;
 
-       /* Active key for device */
-       struct volume_key *vk;
+               /* Active key for device */
+               struct volume_key *vk;
 
-       /* struct crypt_active_device */
-       uint64_t offset;        /* offset in sectors */
-       uint64_t iv_offset;     /* IV initilisation sector */
-       uint64_t size;          /* active device size */
-       uint32_t flags;         /* activation flags */
+               /* struct crypt_active_device */
+               uint64_t offset;        /* offset in sectors */
+               uint64_t iv_offset;     /* IV initilisation sector */
+       } crypt;
+       struct {
+               struct device *hash_device;
+
+               const char *root_hash;
+               uint32_t root_hash_size;
+
+               uint64_t hash_offset;   /* hash offset in blocks (not header) */
+               struct crypt_params_verity *vp;
+       } verity;
+       } u;
 };
 
+void dm_backend_init(void);
+void dm_backend_exit(void);
+
+int dm_remove_device(struct crypt_device *cd, const char *name,
+                    int force, uint64_t size);
+int dm_status_device(struct crypt_device *cd, const char *name);
+int dm_status_suspended(struct crypt_device *cd, const char *name);
+int dm_status_verity_ok(struct crypt_device *cd, const char *name);
+int dm_query_device(struct crypt_device *cd, const char *name,
+                   uint32_t get_flags, struct crypt_dm_active_device *dmd);
+int dm_create_device(struct crypt_device *cd, const char *name,
+                    const char *type, struct crypt_dm_active_device *dmd,
+                    int reload);
+int dm_suspend_and_wipe_key(struct crypt_device *cd, const char *name);
+int dm_resume_and_reinstate_key(struct crypt_device *cd, const char *name,
+                               size_t key_size, const char *key);
+
 const char *dm_get_dir(void);
-int dm_init(struct crypt_device *context, int check_kernel);
-void dm_exit(void);
-int dm_remove_device(const char *name, int force, uint64_t size);
-int dm_status_device(const char *name);
-int dm_status_suspended(const char *name);
-int dm_query_device(const char *name, uint32_t get_flags,
-                   struct crypt_dm_active_device *dmd);
-int dm_create_device(const char *name,
-                     const char *type,
-                     struct crypt_dm_active_device *dmd,
-                     int reload);
-int dm_suspend_and_wipe_key(const char *name);
-int dm_resume_and_reinstate_key(const char *name,
-                               size_t key_size,
-                               const char *key);
-char *dm_device_path(const char *prefix, int major, int minor);
-int dm_is_dm_device(int major, int minor);
-int dm_is_dm_kernel_name(const char *name);
-int dm_check_segment(const char *name, uint64_t offset, uint64_t size);
 
 #endif /* _UTILS_DM_H */