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- /*
- * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
- * The President and Fellows of Harvard College.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #ifndef _KERN_SFS_H_
- #define _KERN_SFS_H_
- /*
- * SFS definitions visible to userspace. This covers the on-disk format
- * and is used by tools that work on SFS volumes, such as mksfs.
- */
- #define SFS_MAGIC 0xabadf001 /* magic number identifying us */
- #define SFS_BLOCKSIZE 512 /* size of our blocks */
- #define SFS_VOLNAME_SIZE 32 /* max length of volume name */
- #define SFS_NDIRECT 15 /* # of direct blocks in inode */
- #define SFS_DBPERIDB 128 /* # direct blks per indirect blk */
- #define SFS_NAMELEN 60 /* max length of filename */
- #define SFS_SB_LOCATION 0 /* block the superblock lives in */
- #define SFS_ROOT_LOCATION 1 /* loc'n of the root dir inode */
- #define SFS_MAP_LOCATION 2 /* 1st block of the freemap */
- #define SFS_NOINO 0 /* inode # for free dir entry */
- /* Number of bits in a block */
- #define SFS_BLOCKBITS (SFS_BLOCKSIZE * CHAR_BIT)
- /* Utility macro */
- #define SFS_ROUNDUP(a,b) ((((a)+(b)-1)/(b))*b)
- /* Size of bitmap (in bits) */
- #define SFS_BITMAPSIZE(nblocks) SFS_ROUNDUP(nblocks, SFS_BLOCKBITS)
- /* Size of bitmap (in blocks) */
- #define SFS_BITBLOCKS(nblocks) (SFS_BITMAPSIZE(nblocks)/SFS_BLOCKBITS)
- /* File types for sfi_type */
- #define SFS_TYPE_INVAL 0 /* Should not appear on disk */
- #define SFS_TYPE_FILE 1
- #define SFS_TYPE_DIR 2
- /*
- * On-disk superblock
- */
- struct sfs_super {
- uint32_t sp_magic; /* Magic number, should be SFS_MAGIC */
- uint32_t sp_nblocks; /* Number of blocks in fs */
- char sp_volname[SFS_VOLNAME_SIZE]; /* Name of this volume */
- uint32_t reserved[118];
- };
- /*
- * On-disk inode
- */
- struct sfs_inode {
- uint32_t sfi_size; /* Size of this file (bytes) */
- uint16_t sfi_type; /* One of SFS_TYPE_* above */
- uint16_t sfi_linkcount; /* # hard links to this file */
- uint32_t sfi_direct[SFS_NDIRECT]; /* Direct blocks */
- uint32_t sfi_indirect; /* Indirect block */
- uint32_t sfi_waste[128-3-SFS_NDIRECT]; /* unused space, set to 0 */
- };
- /*
- * On-disk directory entry
- */
- struct sfs_dir {
- uint32_t sfd_ino; /* Inode number */
- char sfd_name[SFS_NAMELEN]; /* Filename */
- };
- #endif /* _KERN_SFS_H_ */
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