83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
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/* Prototypes for -lminixfs. */
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#ifndef _MINIX_FSLIB_H
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#define _MINIX_FSLIB_H
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#include <minix/safecopies.h>
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#include <minix/sef.h>
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#include <minix/vfsif.h>
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struct buf {
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/* Data portion of the buffer. */
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void *data;
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/* Header portion of the buffer - internal to libminixfs. */
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struct buf *lmfs_next; /* used to link all free bufs in a chain */
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struct buf *lmfs_prev; /* used to link all free bufs the other way */
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struct buf *lmfs_hash; /* used to link bufs on hash chains */
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block_t lmfs_blocknr; /* block number of its (minor) device */
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dev_t lmfs_dev; /* major | minor device where block resides */
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char lmfs_count; /* number of users of this buffer */
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char lmfs_needsetcache; /* to be identified to VM */
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unsigned int lmfs_bytes; /* Number of bytes allocated in bp */
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u32_t lmfs_flags; /* Flags shared between VM and FS */
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/* If any, which inode & offset does this block correspond to?
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* If none, VMC_NO_INODE
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*/
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ino_t lmfs_inode;
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u64_t lmfs_inode_offset;
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};
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int fs_lookup_credentials(vfs_ucred_t *credentials,
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uid_t *caller_uid, gid_t *caller_gid, cp_grant_id_t grant2, size_t cred_size);
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void lmfs_markdirty(struct buf *bp);
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void lmfs_markclean(struct buf *bp);
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int lmfs_isclean(struct buf *bp);
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dev_t lmfs_dev(struct buf *bp);
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int lmfs_bytes(struct buf *bp);
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int lmfs_bufs_in_use(void);
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int lmfs_nr_bufs(void);
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void lmfs_flushall(void);
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int lmfs_fs_block_size(void);
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void lmfs_may_use_vmcache(int);
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void lmfs_set_blocksize(int blocksize, int major);
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void lmfs_reset_rdwt_err(void);
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int lmfs_rdwt_err(void);
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void lmfs_buf_pool(int new_nr_bufs);
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struct buf *lmfs_get_block(dev_t dev, block_t block,int only_search);
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struct buf *lmfs_get_block_ino(dev_t dev, block_t block,int only_search,
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ino_t ino, u64_t off);
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void lmfs_invalidate(dev_t device);
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void lmfs_put_block(struct buf *bp, int block_type);
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void lmfs_rw_scattered(dev_t, struct buf **, int, int);
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void lmfs_setquiet(int q);
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int lmfs_do_bpeek(message *);
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void lmfs_cache_reevaluate(dev_t dev);
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void lmfs_blockschange(dev_t dev, int delta);
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/* calls that libminixfs does into fs */
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void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used);
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int fs_sync(void);
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/* get_block arguments */
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#define NORMAL 0 /* forces get_block to do disk read */
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#define NO_READ 1 /* prevents get_block from doing disk read */
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#define PREFETCH 2 /* tells get_block not to read or mark dev */
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/* When a block is released, the type of usage is passed to put_block(). */
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#define ONE_SHOT 0200 /* set if block not likely to be needed soon */
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#define INODE_BLOCK 0 /* inode block */
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#define DIRECTORY_BLOCK 1 /* directory block */
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#define INDIRECT_BLOCK 2 /* pointer block */
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#define MAP_BLOCK 3 /* bit map */
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#define FULL_DATA_BLOCK 5 /* data, fully used */
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#define PARTIAL_DATA_BLOCK 6 /* data, partly used*/
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#define END_OF_FILE (-104) /* eof detected */
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#endif /* _MINIX_FSLIB_H */
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