Lines Matching +full:block +full:- +full:number

1 /*-
7 /*-
8  * SPDX-License-Identifier: BSD-3-Clause
42  * Each disk drive contains some number of file systems.
43  * A file system consists of a number of cylinder groups.
46  * A file system is described by its super-block, which in turn
47  * describes the cylinder groups.  The super-block is critical
50  * super-block data does not change, so the copies need not be
54  * The byte-offset forms are preferred, as they don't imply a sector size.
64  * the super block for this name.
82  * which tell the system the average file size and the average number
86  * AVFPDIR is the expected number of files per directory. AVGDIRSIZE is
99  * Turn file system block numbers into disk block addresses.
102 #define	fsbtodb(fs, b)	((daddr_t)(b) << (fs)->e2fs_fsbtodb)
103 #define	dbtofsb(fs, b)	((b) >> (fs)->e2fs_fsbtodb)
106 #define	ino_to_cg(fs, x)	(((x) - 1) / (fs->e2fs_ipg))
108 /* get block containing inode from its number x */
110 	(e2fs_gd_get_i_tables(&(fs)->e2fs_gd[ino_to_cg((fs), (x))]) +   \
111 	    (((x) - 1) % (fs)->e2fs_ipg) / (fs)->e2fs_ipb)
113 /* get offset for inode in block */
114 #define	ino_to_fsbo(fs, x)	((x-1) % (fs->e2fs_ipb))
117  * Give cylinder group number for a file system block.
118  * Give cylinder group block number for a file system block.
120 #define	dtog(fs, d)	(((d) - le32toh(fs->e2fs->e2fs_first_dblock)) / \
122 #define	dtogd(fs, d)	(((d) - le32toh(fs->e2fs->e2fs_first_dblock)) % \
130 #define	blkoff(fs, loc)		/* calculates (loc % fs->fs_bsize) */ \
131 	((loc) & (fs)->e2fs_qbmask)
133 #define	lblktosize(fs, blk)	/* calculates (blk * fs->fs_bsize) */ \
134 	((blk) << (fs->e2fs_bshift))
136 #define	lblkno(fs, loc)		/* calculates (loc / fs->fs_bsize) */ \
137 	((loc) >> (fs->e2fs_bshift))
139 /* no fragments -> logical block number equal # of frags */
140 #define	numfrags(fs, loc)	/* calculates (loc / fs->fs_fsize) */ \
141 	((loc) >> (fs->e2fs_bshift))
143 #define	fragroundup(fs, size)	/* calculates roundup(size, fs->fs_fsize) */ \
144 	roundup(size, fs->e2fs_fsize)
145 	/* was (((size) + (fs)->fs_qfmask) & (fs)->fs_fmask) */
148  * Determining the size of a file block in the file system.
151 #define	blksize(fs, ip, lbn) ((fs)->e2fs_fsize)
154  * INOPB is the number of inodes in a secondary storage block.
156 #define	INOPB(fs)	(fs->e2fs_ipb)
159  * NINDIR is the number of indirects in a file system block.