cnid_private.h File Reference

Go to the source code of this file.

Macros
#define	CNID_OFS   0
#define	CNID_LEN   4
#define	CNID_DEV_OFS   CNID_LEN
#define	CNID_DEV_LEN   8
#define	CNID_INO_OFS   (CNID_DEV_OFS + CNID_DEV_LEN)
#define	CNID_INO_LEN   8
#define	CNID_DEVINO_OFS   CNID_LEN
#define	CNID_DEVINO_LEN   (CNID_DEV_LEN + CNID_INO_LEN)
#define	CNID_TYPE_OFS   (CNID_DEVINO_OFS + CNID_DEVINO_LEN)
#define	CNID_TYPE_LEN   4
#define	CNID_DID_OFS   (CNID_TYPE_OFS + CNID_TYPE_LEN)
#define	CNID_DID_LEN   CNID_LEN
#define	CNID_NAME_OFS   (CNID_DID_OFS + CNID_DID_LEN)
#define	CNID_HEADER_LEN   (CNID_NAME_OFS)
#define	CNIDFLAG_ROOTINFO_RO   (1 << 0)
#define	CNIDFLAG_DB_RO   (1 << 1)
#define	ROOTINFO_KEY   "\0\0\0\0"
#define	ROOTINFO_KEYLEN   4
#define	ROOTINFO_DATA
#define	ROOTINFO_DATALEN   (3*4 + 2*8 + 9)
#define	CNID_VERSION_0   0
#define	CNID_VERSION_1   1
#define	CNID_VERSION_UNINTIALIZED_DB   UINT32_MAX
#define	CNID_VERSION   CNID_VERSION_1

Detailed Description

Common defines for cnid

Macro Definition Documentation

CNID_DEV_LEN

#define CNID_DEV_LEN   8

CNID_DEV_OFS

#define CNID_DEV_OFS   CNID_LEN

CNID_DEVINO_LEN

#define CNID_DEVINO_LEN   (CNID_DEV_LEN + CNID_INO_LEN)

CNID_DEVINO_OFS

#define CNID_DEVINO_OFS   CNID_LEN

CNID_DID_LEN

#define CNID_DID_LEN   CNID_LEN

CNID_DID_OFS

#define CNID_DID_OFS   (CNID_TYPE_OFS + CNID_TYPE_LEN)

CNID_HEADER_LEN

#define CNID_HEADER_LEN   (CNID_NAME_OFS)

CNID_INO_LEN

#define CNID_INO_LEN   8

CNID_INO_OFS

#define CNID_INO_OFS   (CNID_DEV_OFS + CNID_DEV_LEN)

CNID_LEN

#define CNID_LEN   4

CNID_NAME_OFS

#define CNID_NAME_OFS   (CNID_DID_OFS + CNID_DID_LEN)

CNID_OFS

#define CNID_OFS   0

CNID_TYPE_LEN

#define CNID_TYPE_LEN   4

CNID_TYPE_OFS

#define CNID_TYPE_OFS   (CNID_DEVINO_OFS + CNID_DEVINO_LEN)

CNID_VERSION

#define CNID_VERSION   CNID_VERSION_1

CNID_VERSION_0

#define CNID_VERSION_0   0

CNID_VERSION_1

#define CNID_VERSION_1   1

CNID_VERSION_UNINTIALIZED_DB

#define CNID_VERSION_UNINTIALIZED_DB   UINT32_MAX

CNIDFLAG_DB_RO

#define CNIDFLAG_DB_RO   (1 << 1)

CNIDFLAG_ROOTINFO_RO

#define CNIDFLAG_ROOTINFO_RO   (1 << 0)

ROOTINFO_DATA

#define ROOTINFO_DATA

Value:

                         "\0\0\0\0" \
                         "\0\0\0\0\0\0\0\0" \
                         "\0\0\0\0\0\0\0\0" \
                         "\0\0\0\0" \
                         "\0\0\0\0" \
                         "RootInfo"

Rootinfo data, fields as they are used by normal entries for CNIDs (for reference):

• 4 bytes: CNID
• 8 bytes: dev
• 8 bytes: inode
• 4 bytes: is a file/directory (type)
• 4 bytes: DID
• x bytes: name

Contents in Rootinfo entry:

• 4 bytes: 0
• 8 bytes: db stamp: struct stat.st_ctime of database file
• 8 bytes: unused
• 4 bytes: last used CNID
• 4 bytes: version as htonl(uint32_t)
• 9 bytes: name "RootInfo"

ROOTINFO_DATALEN

#define ROOTINFO_DATALEN   (3*4 + 2*8 + 9)

ROOTINFO_KEY

#define ROOTINFO_KEY   "\0\0\0\0"

ROOTINFO_KEYLEN

#define ROOTINFO_KEYLEN   4