Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 246 insertions, 0 deletions

diff --git a/lib/utils_dm.h b/lib/utils_dm.h
new file mode 100644
index 0000000..79212a2
--- /dev/null
+++ b/lib/utils_dm.h
@@ -0,0 +1,246 @@
+/*
+ * libdevmapper - device-mapper backend for cryptsetup
+ *
+ * Copyright (C) 2004 Jana Saout <jana@saout.de>
+ * Copyright (C) 2004-2007 Clemens Fruhwirth <clemens@endorphin.org>
+ * Copyright (C) 2009-2023 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2023 Milan Broz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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
+
+/* device-mapper library helpers */
+#include <stddef.h>
+#include <stdint.h>
+
+struct crypt_device;
+struct volume_key;
+struct crypt_params_verity;
+struct device;
+struct crypt_params_integrity;
+
+/* Device mapper internal flags */
+#define DM_RESUME_PRIVATE      (1 << 4) /* CRYPT_ACTIVATE_PRIVATE */
+#define DM_SUSPEND_SKIP_LOCKFS (1 << 5)
+#define DM_SUSPEND_WIPE_KEY    (1 << 6)
+#define DM_SUSPEND_NOFLUSH     (1 << 7)
+
+static inline uint32_t act2dmflags(uint32_t act_flags)
+{
+	return (act_flags & DM_RESUME_PRIVATE);
+}
+
+/* Device mapper backend - kernel support flags */
+#define DM_KEY_WIPE_SUPPORTED (1 << 0)	/* key wipe message */
+#define DM_LMK_SUPPORTED      (1 << 1)	/* lmk mode */
+#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 */
+#define DM_TCW_SUPPORTED      (1 << 6)	/* tcw (TCRYPT CBC with whitening) */
+#define DM_SAME_CPU_CRYPT_SUPPORTED (1 << 7) /* same_cpu_crypt */
+#define DM_SUBMIT_FROM_CRYPT_CPUS_SUPPORTED (1 << 8) /* submit_from_crypt_cpus */
+#define DM_VERITY_ON_CORRUPTION_SUPPORTED (1 << 9) /* ignore/restart_on_corruption, ignore_zero_block */
+#define DM_VERITY_FEC_SUPPORTED (1 << 10) /* Forward Error Correction (FEC) */
+#define DM_KERNEL_KEYRING_SUPPORTED (1 << 11) /* dm-crypt allows loading kernel keyring keys */
+#define DM_INTEGRITY_SUPPORTED (1 << 12) /* dm-integrity target supported */
+#define DM_SECTOR_SIZE_SUPPORTED (1 << 13) /* support for sector size setting in dm-crypt/dm-integrity */
+#define DM_CAPI_STRING_SUPPORTED (1 << 14) /* support for cryptoapi format cipher definition */
+#define DM_DEFERRED_SUPPORTED (1 << 15) /* deferred removal of device */
+#define DM_INTEGRITY_RECALC_SUPPORTED (1 << 16) /* dm-integrity automatic recalculation supported */
+#define DM_INTEGRITY_BITMAP_SUPPORTED (1 << 17) /* dm-integrity bitmap mode supported */
+#define DM_GET_TARGET_VERSION_SUPPORTED (1 << 18) /* dm DM_GET_TARGET version ioctl supported */
+#define DM_INTEGRITY_FIX_PADDING_SUPPORTED (1 << 19) /* supports the parameter fix_padding that fixes a bug that caused excessive padding */
+#define DM_BITLK_EBOIV_SUPPORTED (1 << 20) /* EBOIV for BITLK supported */
+#define DM_BITLK_ELEPHANT_SUPPORTED (1 << 21) /* Elephant diffuser for BITLK supported */
+#define DM_VERITY_SIGNATURE_SUPPORTED (1 << 22) /* Verity option root_hash_sig_key_desc supported */
+#define DM_INTEGRITY_DISCARDS_SUPPORTED (1 << 23) /* dm-integrity discards/TRIM option is supported */
+#define DM_INTEGRITY_RESIZE_SUPPORTED (1 << 23) /* dm-integrity resize of the integrity device supported (introduced in the same version as discards)*/
+#define DM_VERITY_PANIC_CORRUPTION_SUPPORTED (1 << 24) /* dm-verity panic on corruption  */
+#define DM_CRYPT_NO_WORKQUEUE_SUPPORTED (1 << 25) /* dm-crypt suppot for bypassing workqueues  */
+#define DM_INTEGRITY_FIX_HMAC_SUPPORTED (1 << 26) /* hmac covers also superblock */
+#define DM_INTEGRITY_RESET_RECALC_SUPPORTED (1 << 27) /* dm-integrity automatic recalculation supported */
+#define DM_VERITY_TASKLETS_SUPPORTED (1 << 28) /* dm-verity tasklets supported */
+
+typedef enum { DM_CRYPT = 0, DM_VERITY, DM_INTEGRITY, DM_LINEAR, DM_ERROR, DM_ZERO, DM_UNKNOWN } dm_target_type;
+enum tdirection { TARGET_EMPTY = 0, TARGET_SET, TARGET_QUERY };
+
+int dm_flags(struct crypt_device *cd, dm_target_type target, uint32_t *flags);
+
+#define DM_ACTIVE_DEVICE	(1 << 0)
+#define DM_ACTIVE_UUID		(1 << 1)
+#define DM_ACTIVE_HOLDERS	(1 << 2)
+
+#define DM_ACTIVE_CRYPT_CIPHER	(1 << 3)
+#define DM_ACTIVE_CRYPT_KEYSIZE	(1 << 4)
+#define DM_ACTIVE_CRYPT_KEY	(1 << 5)
+
+#define DM_ACTIVE_VERITY_ROOT_HASH	(1 << 6)
+#define DM_ACTIVE_VERITY_HASH_DEVICE	(1 << 7)
+#define DM_ACTIVE_VERITY_PARAMS		(1 << 8)
+
+#define DM_ACTIVE_INTEGRITY_PARAMS	(1 << 9)
+
+#define DM_ACTIVE_JOURNAL_CRYPT_KEY	(1 << 10)
+#define DM_ACTIVE_JOURNAL_CRYPT_KEYSIZE	(1 << 11)
+
+#define DM_ACTIVE_JOURNAL_MAC_KEY	(1 << 12)
+#define DM_ACTIVE_JOURNAL_MAC_KEYSIZE	(1 << 13)
+
+struct dm_target {
+	dm_target_type type;
+	enum tdirection direction;
+	uint64_t offset;
+	uint64_t size;
+	struct device *data_device;
+	union {
+	struct {
+		const char *cipher;
+		const char *integrity;
+
+		/* Active key for device */
+		struct volume_key *vk;
+
+		/* struct crypt_active_device */
+		uint64_t offset;	/* offset in sectors */
+		uint64_t iv_offset;	/* IV initialisation sector */
+		uint32_t tag_size;	/* additional on-disk tag size */
+		uint32_t sector_size;	/* encryption sector size */
+	} crypt;
+	struct {
+		struct device *hash_device;
+		struct device *fec_device;
+
+		const char *root_hash;
+		uint32_t root_hash_size;
+		const char *root_hash_sig_key_desc;
+
+		uint64_t hash_offset;	/* hash offset in blocks (not header) */
+		uint64_t fec_offset;	/* FEC offset in blocks (not header) */
+		uint64_t fec_blocks;	/* FEC blocks covering data + hash + padding (foreign metadata)*/
+		struct crypt_params_verity *vp;
+	} verity;
+	struct {
+		uint64_t journal_size;
+		uint32_t journal_watermark;
+		uint32_t journal_commit_time;
+		uint32_t interleave_sectors;
+		uint32_t tag_size;
+		uint64_t offset;	/* offset in sectors */
+		uint32_t sector_size;	/* integrity sector size */
+		uint32_t buffer_sectors;
+
+		const char *integrity;
+		/* Active key for device */
+		struct volume_key *vk;
+
+		const char *journal_integrity;
+		struct volume_key *journal_integrity_key;
+
+		const char *journal_crypt;
+		struct volume_key *journal_crypt_key;
+
+		struct device *meta_device;
+
+		bool fix_padding;
+		bool fix_hmac;
+		bool legacy_recalc;
+	} integrity;
+	struct {
+		uint64_t offset;
+	} linear;
+	struct {
+	} zero;
+	} u;
+
+	char *params;
+	struct dm_target *next;
+};
+
+struct crypt_dm_active_device {
+	uint64_t size;		/* active device size */
+	uint32_t flags;		/* activation flags */
+	const char *uuid;
+
+	unsigned holders:1;	/* device holders detected (on query only) */
+
+	struct dm_target segment;
+};
+
+static inline bool single_segment(const struct crypt_dm_active_device *dmd)
+{
+	return dmd && !dmd->segment.next;
+}
+
+void dm_backend_init(struct crypt_device *cd);
+void dm_backend_exit(struct crypt_device *cd);
+
+int dm_targets_allocate(struct dm_target *first, unsigned count);
+void dm_targets_free(struct crypt_device *cd, struct crypt_dm_active_device *dmd);
+
+int dm_crypt_target_set(struct dm_target *tgt, uint64_t seg_offset, uint64_t seg_size,
+	struct device *data_device, struct volume_key *vk, const char *cipher,
+	uint64_t iv_offset, uint64_t data_offset, const char *integrity,
+	uint32_t tag_size, uint32_t sector_size);
+int dm_verity_target_set(struct dm_target *tgt, uint64_t seg_offset, uint64_t seg_size,
+	struct device *data_device, struct device *hash_device, struct device *fec_device,
+	const char *root_hash, uint32_t root_hash_size, const char* root_hash_sig_key_desc,
+	uint64_t hash_offset_block, uint64_t fec_blocks, struct crypt_params_verity *vp);
+int dm_integrity_target_set(struct crypt_device *cd,
+	struct dm_target *tgt, uint64_t seg_offset, uint64_t seg_size,
+	struct device *meta_device,
+	struct device *data_device, uint64_t tag_size, uint64_t offset, uint32_t sector_size,
+	struct volume_key *vk,
+	struct volume_key *journal_crypt_key, struct volume_key *journal_mac_key,
+	const struct crypt_params_integrity *ip);
+int dm_linear_target_set(struct dm_target *tgt, uint64_t seg_offset, uint64_t seg_size,
+	struct device *data_device, uint64_t data_offset);
+int dm_zero_target_set(struct dm_target *tgt, uint64_t seg_offset, uint64_t seg_size);
+
+int dm_remove_device(struct crypt_device *cd, const char *name, uint32_t flags);
+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_status_integrity_failures(struct crypt_device *cd, const char *name, uint64_t *count);
+int dm_query_device(struct crypt_device *cd, const char *name,
+		    uint32_t get_flags, struct crypt_dm_active_device *dmd);
+int dm_device_deps(struct crypt_device *cd, const char *name, const char *prefix,
+		   char **names, size_t names_length);
+int dm_create_device(struct crypt_device *cd, const char *name,
+		     const char *type, struct crypt_dm_active_device *dmd);
+int dm_reload_device(struct crypt_device *cd, const char *name,
+		     struct crypt_dm_active_device *dmd, uint32_t dmflags, unsigned resume);
+int dm_suspend_device(struct crypt_device *cd, const char *name, uint32_t dmflags);
+int dm_resume_device(struct crypt_device *cd, const char *name, uint32_t dmflags);
+int dm_resume_and_reinstate_key(struct crypt_device *cd, const char *name,
+				const struct volume_key *vk);
+int dm_error_device(struct crypt_device *cd, const char *name);
+int dm_clear_device(struct crypt_device *cd, const char *name);
+int dm_cancel_deferred_removal(const char *name);
+
+const char *dm_get_dir(void);
+
+int lookup_dm_dev_by_uuid(struct crypt_device *cd, const char *uuid, const char *type);
+
+/* These are DM helpers used only by utils_devpath file */
+int dm_is_dm_device(int major);
+int dm_is_dm_kernel_name(const char *name);
+char *dm_device_path(const char *prefix, int major, int minor);
+char *dm_device_name(const char *path);
+
+#endif /* _UTILS_DM_H */