minix/servers/iso9660fs/buf.h

#include <dirent.h>

#define b_data(bp) ((char *) (bp->data))

/* A block is free if b_dev == NO_DEV. */

#define INODE_BLOCK        0				 /* inode block */
#define DIRECTORY_BLOCK    1				 /* directory block */
Initial import of ISOFS by Jacopo Urbani 2009-10-01 16:00:27 +02:00			`#include <dirent.h>`

Move primary cache code to libminixfs. Add primary cache management feature to libminixfs as mfs and ext2 currently do separately, remove cache code from mfs and ext2, and make them use the libminixfs interface. This makes all fields of the buf struct private to libminixfs and FS clients aren't supposed to access them at all. Only the opaque 'void *data' field (the FS block contents, used to be called bp) is to be accessed by the FS client. The main purpose is to implement the interface to the 2ndary vm cache just once, get rid of some code duplication, and add a little abstraction to reduce the code inertia of the whole caching business. Some minor sanity checking and prohibition done by mfs in this code as removed from the generic primary cache code as a result: - checking all inodes are not in use when allocating/resizing the cache - checking readonly filesystems aren't written to - checking the superblock isn't written to on mounted filesystems The minixfslib code relies on fs_blockstats() in the client filesystem to return some FS usage information. 2012-10-16 17:40:39 +02:00			`#define b_data(bp) ((char *) (bp->data))`
Initial import of ISOFS by Jacopo Urbani 2009-10-01 16:00:27 +02:00
			`/* A block is free if b_dev == NO_DEV. */`

			`#define INODE_BLOCK 0 /* inode block */`
			`#define DIRECTORY_BLOCK 1 /* directory block */`