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* Copyright (C) 2004, Christophe Saout <christophe@saout.de>
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* Copyright (C) 2004-2007, Clemens Fruhwirth <clemens@endorphin.org>
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* Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
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* Copyright (C) 2009-2012, Milan Broz
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, unsigned keylength);
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void crypt_free_volume_key(struct volume_key *vk);
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int device_alloc(struct device **device, const char *path);
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void device_free(struct device *device);
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const char *device_path(const struct device *device);
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const char *device_block_path(const struct device *device);
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void device_topology_alignment(struct device *device,
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unsigned long *required_alignment, /* bytes */
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unsigned long *alignment_offset, /* bytes */
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unsigned long default_alignment);
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int device_block_size(struct device *device);
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int device_read_ahead(struct device *device, uint32_t *read_ahead);
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int device_size(struct device *device, uint64_t *size);
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int device_open(struct device *device, int flags);
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enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 };
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int device_block_adjust(struct crypt_device *cd,
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struct device *device,
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enum devcheck device_check,
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uint64_t device_offset,
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size_t size_round_up(size_t size, unsigned int block);
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/* Receive backend devices from context helpers */
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struct device *crypt_metadata_device(struct crypt_device *cd);
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struct device *crypt_data_device(struct crypt_device *cd);
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int crypt_confirm(struct crypt_device *cd, const char *msg);
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char *crypt_lookup_dev(const char *dev_id);
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int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size);
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int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
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int sector_size_for_device(const char *device);
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int device_read_ahead(const char *dev, uint32_t *read_ahead);
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ssize_t write_blockwise(int fd, void *buf, size_t count);
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ssize_t read_blockwise(int fd, void *_buf, size_t count);
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ssize_t write_lseek_blockwise(int fd, char *buf, size_t count, off_t offset);
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int device_ready(struct crypt_device *cd, const char *device, int mode);
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int device_size(const char *device, uint64_t *size);
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ssize_t write_blockwise(int fd, int bsize, void *buf, size_t count);
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ssize_t read_blockwise(int fd, int bsize, void *_buf, size_t count);
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ssize_t write_lseek_blockwise(int fd, int bsize, char *buf, size_t count, off_t offset);
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enum devcheck { DEV_OK = 0, DEV_EXCL = 1, DEV_SHARED = 2 };
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int device_check_and_adjust(struct crypt_device *cd,
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enum devcheck device_check,
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unsigned crypt_getpagesize(void);
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int init_crypto(struct crypt_device *ctx);
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void logger(struct crypt_device *cd, int class, const char *file, int line, const char *format, ...);
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#define log_dbg(x...) logger(NULL, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
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#define log_err(c, x...) logger(c, CRYPT_LOG_ERROR, __FILE__, __LINE__, x)
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int crypt_get_debug_level(void);
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void debug_processes_using_device(const char *name);
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int crypt_memlock_inc(struct crypt_device *ctx);
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int crypt_memlock_dec(struct crypt_device *ctx);
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void get_topology_alignment(const char *device,
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unsigned long *required_alignment, /* bytes */
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unsigned long *alignment_offset, /* bytes */
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unsigned long default_alignment);
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int crypt_random_init(struct crypt_device *ctx);
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int crypt_random_get(struct crypt_device *ctx, char *buf, size_t len, int quality);
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void crypt_random_exit(void);