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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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