linncreate

The LinnCreate program can create a new LinnFS filesystem. More...

Data Structures
class	LinnCreate
	Class for creating new Linnenbank FileSystems. More...

Macros
#define	LINN_CREATE_BLOCK_SIZE   2048
	Default block size.
#define	LINN_CREATE_BLOCK_NUM   8192
	Default number of blocks to allocate.
#define	LINN_CREATE_BLOCKS_PER_GROUP   8192
	Default number of data blocks per group descriptor.
#define	LINN_CREATE_INODE_NUM   1024
	Default number of inodes to allocate.
#define	LINN_CREATE_INODES_PER_GROUP   1024
	Default number of inodes per group descriptor.
#define	BLOCKPTR(type, nr)   (type *)(blocks + (super->blockSize * (nr)))
	Returns a pointer to the correct in-memory block.
#define	BLOCKS(sb, count)
	Retrieve a given number of free contiguous blocks.
#define	BLOCK(sb)    BLOCKS(sb, (ulong)1)
	Retrieve one free block.
#define	FILETYPE_FROM_ST(st)
	Convert from a (host system's) POSIX struct stat into a FileType.
#define	FILEMODE_FROM_ST(st)    (FileSystem::FileMode)((st)->st_mode & 0777)
	Converts an (host system's) POSIX struct st into a FileMode.

Detailed Description

The LinnCreate program can create a new LinnFS filesystem.

Macro Definition Documentation

BLOCK

#define BLOCK

(

sb

)

BLOCKS(sb, (ulong)1)

Retrieve one free block.

Parameters

sb	LinnSuperBlock pointer.

Returns

Block number of a free block.

Definition at line 91 of file LinnCreate.h.

BLOCKPTR

#define BLOCKPTR	(		type,
			nr
	)		(type *)(blocks + (super->blockSize * (nr)))

Returns a pointer to the correct in-memory block.

Parameters

type	Data type to return a pointer for.
nr	Block number.

Returns

A pointer of the given type.

Definition at line 62 of file LinnCreate.h.

BLOCKS

#define BLOCKS	(		sb,
			count
	)

Value:

    ({ \
        if ((sb)->freeBlocksCount < (count)) \
        { \
            printf("%s: not enough free blocks remaining (%lu needed)\n", \
                    prog, (ulong)(count)); \
            exit(EXIT_FAILURE); \
        } \
        (sb)->freeBlocksCount -= (count); \
        ((sb)->blocksCount - (sb)->freeBlocksCount - (count)); \
     })

Retrieve a given number of free contiguous blocks.

Parameters

sb	LinnSuperBlock pointer.
count	Number of blocks

Returns

Block number of the first block in the contiguous array of blocks.

Definition at line 72 of file LinnCreate.h.

FILEMODE_FROM_ST

#define FILEMODE_FROM_ST

(

st

)

(FileSystem::FileMode)((st)->st_mode & 0777)

Converts an (host system's) POSIX struct st into a FileMode.

Parameters

st	struct st pointer.

Returns

FileMode value.

Definition at line 126 of file LinnCreate.h.

FILETYPE_FROM_ST

#define FILETYPE_FROM_ST

(

st

)

Value:

({ \
    FileSystem::FileType t = FileSystem::UnknownFile; \
    \
    switch ((st)->st_mode & S_IFMT) \
    { \
        case S_IFBLK:  t = FileSystem::BlockDeviceFile; break; \
        case S_IFCHR:  t = FileSystem::CharacterDeviceFile; break; \
        case S_IFIFO:  t = FileSystem::FIFOFile; break; \
        case S_IFREG:  t = FileSystem::RegularFile; break; \
        case S_IFDIR:  t = FileSystem::DirectoryFile; break; \
        case S_IFLNK:  t = FileSystem::SymlinkFile; break; \
        case S_IFSOCK: t = FileSystem::SocketFile; break; \
        default: break; \
    } \
    t; \
})

Convert from a (host system's) POSIX struct stat into a FileType.

Parameters

st	struct stat pointer.

Returns

FileType value.

Definition at line 101 of file LinnCreate.h.

LINN_CREATE_BLOCK_NUM

#define LINN_CREATE_BLOCK_NUM   8192

Default number of blocks to allocate.

Definition at line 43 of file LinnCreate.h.

LINN_CREATE_BLOCK_SIZE

#define LINN_CREATE_BLOCK_SIZE   2048

Default block size.

Definition at line 40 of file LinnCreate.h.

LINN_CREATE_BLOCKS_PER_GROUP

#define LINN_CREATE_BLOCKS_PER_GROUP   8192

Default number of data blocks per group descriptor.

Definition at line 46 of file LinnCreate.h.

LINN_CREATE_INODE_NUM

#define LINN_CREATE_INODE_NUM   1024

Default number of inodes to allocate.

Definition at line 49 of file LinnCreate.h.

LINN_CREATE_INODES_PER_GROUP

#define LINN_CREATE_INODES_PER_GROUP   1024

Default number of inodes per group descriptor.

Definition at line 52 of file LinnCreate.h.