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/*
Copyright (c) 2008-2013 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef __CRYPT_COMMON_H__
#define __CRYPT_COMMON_H__
#define INVAL_SUBVERSION_NUMBER (0xff)
#define CRYPT_INVAL_OP (GF_FOP_NULL)
#define CRYPTO_FORMAT_PREFIX "trusted.glusterfs.crypt.att.cfmt"
#define FSIZE_XATTR_PREFIX "trusted.glusterfs.crypt.att.size"
#define SUBREQ_PREFIX "trusted.glusterfs.crypt.msg.sreq"
#define FSIZE_MSG_PREFIX "trusted.glusterfs.crypt.msg.size"
#define DE_MSG_PREFIX "trusted.glusterfs.crypt.msg.dent"
#define REQUEST_ID_PREFIX "trusted.glusterfs.crypt.msg.rqid"
#define MSGFLAGS_PREFIX "trusted.glusterfs.crypt.msg.xfgs"
/* messages for crypt_open() */
#define MSGFLAGS_REQUEST_MTD_RLOCK 1 /* take read lock and don't unlock */
#define MSGFLAGS_REQUEST_MTD_WLOCK 2 /* take write lock and don't unlock */
#define AES_BLOCK_BITS (4) /* AES_BLOCK_SIZE == 1 << AES_BLOCK_BITS */
#define noop \
do { \
; \
} while (0)
#define cassert(cond) \
({ \
switch (-1) { \
case (cond): \
case 0: \
break; \
} \
})
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
#define round_up(x, y) ((((x)-1) | __round_mask(x, y)) + 1)
/*
* Format of file's metadata
*/
struct crypt_format {
uint8_t loader_id; /* version of metadata loader */
uint8_t versioned[0]; /* file's metadata of specific version */
} __attribute__((packed));
typedef enum { AES_CIPHER_ALG, LAST_CIPHER_ALG } cipher_alg_t;
typedef enum { XTS_CIPHER_MODE, LAST_CIPHER_MODE } cipher_mode_t;
typedef enum { MTD_LOADER_V1, LAST_MTD_LOADER } mtd_loader_id;
static inline void
msgflags_set_mtd_rlock(uint32_t *flags)
{
*flags |= MSGFLAGS_REQUEST_MTD_RLOCK;
}
static inline void
msgflags_set_mtd_wlock(uint32_t *flags)
{
*flags |= MSGFLAGS_REQUEST_MTD_WLOCK;
}
static inline gf_boolean_t
msgflags_check_mtd_rlock(uint32_t *flags)
{
return *flags & MSGFLAGS_REQUEST_MTD_RLOCK;
}
static inline gf_boolean_t
msgflags_check_mtd_wlock(uint32_t *flags)
{
return *flags & MSGFLAGS_REQUEST_MTD_WLOCK;
}
static inline gf_boolean_t
msgflags_check_mtd_lock(uint32_t *flags)
{
return msgflags_check_mtd_rlock(flags) || msgflags_check_mtd_wlock(flags);
}
/*
* returns number of logical blocks occupied
* (maybe partially) by @count bytes
* at offset @start.
*/
static inline off_t
logical_blocks_occupied(uint64_t start, off_t count, int blkbits)
{
return ((start + count - 1) >> blkbits) - (start >> blkbits) + 1;
}
/*
* are two bytes (represented by offsets @off1
* and @off2 respectively) in the same logical
* block.
*/
static inline int
in_same_lblock(uint64_t off1, uint64_t off2, int blkbits)
{
return off1 >> blkbits == off2 >> blkbits;
}
static inline void
dump_cblock(xlator_t *this, unsigned char *buf)
{
gf_log(this->name, GF_LOG_DEBUG,
"dump cblock: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x",
(buf)[0], (buf)[1], (buf)[2], (buf)[3], (buf)[4], (buf)[5], (buf)[6],
(buf)[7], (buf)[8], (buf)[9], (buf)[10], (buf)[11], (buf)[12],
(buf)[13], (buf)[14], (buf)[15]);
}
#endif /* __CRYPT_COMMON_H__ */
/*
Local variables:
c-indentation-style: "K&R"
mode-name: "LC"
c-basic-offset: 8
tab-width: 8
fill-column: 80
scroll-step: 1
End:
*/
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