23 lines
746 B
C
23 lines
746 B
C
#include <sys/dir.h> /* need struct direct */
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#include <dirent.h>
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PUBLIC struct buf {
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union {
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char b__data[_MAX_BLOCK_SIZE]; /* ordinary user data */
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struct direct b__dir[NR_DIR_ENTRIES(_MAX_BLOCK_SIZE)];/* directory block */
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} b;
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block_t b_blocknr; /* block number of its (minor) device */
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char b_count; /* number of users of this buffer */
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} buf[NR_BUFS];
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/* A block is free if b_dev == NO_DEV. */
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#define NIL_BUF ((struct buf *) 0) /* indicates absence of a buffer */
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/* These defs make it possible to use to bp->b_data instead of bp->b.b__data */
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#define b_data b.b__data
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#define b_dir b.b__dir
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#define INODE_BLOCK 0 /* inode block */
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#define DIRECTORY_BLOCK 1 /* directory block */
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