1 /* Prototypes for -lminixfs. */ 2 3 #ifndef _MINIX_FSLIB_H 4 #define _MINIX_FSLIB_H 5 6 #include <minix/safecopies.h> 7 #include <minix/sef.h> 8 #include <minix/vfsif.h> 9 10 struct buf { 11 /* Data portion of the buffer. */ 12 void *data; 13 14 /* Header portion of the buffer - internal to libminixfs. */ 15 struct buf *lmfs_next; /* used to link all free bufs in a chain */ 16 struct buf *lmfs_prev; /* used to link all free bufs the other way */ 17 struct buf *lmfs_hash; /* used to link bufs on hash chains */ 18 block_t lmfs_blocknr; /* block number of its (minor) device */ 19 dev_t lmfs_dev; /* major | minor device where block resides */ 20 char lmfs_count; /* number of users of this buffer */ 21 char lmfs_needsetcache; /* to be identified to VM */ 22 unsigned int lmfs_bytes; /* Number of bytes allocated in bp */ 23 u32_t lmfs_flags; /* Flags shared between VM and FS */ 24 25 /* If any, which inode & offset does this block correspond to? 26 * If none, VMC_NO_INODE 27 */ 28 ino_t lmfs_inode; 29 u64_t lmfs_inode_offset; 30 }; 31 32 int fs_lookup_credentials(vfs_ucred_t *credentials, 33 uid_t *caller_uid, gid_t *caller_gid, cp_grant_id_t grant2, size_t cred_size); 34 35 void lmfs_markdirty(struct buf *bp); 36 void lmfs_markclean(struct buf *bp); 37 int lmfs_isclean(struct buf *bp); 38 dev_t lmfs_dev(struct buf *bp); 39 int lmfs_bytes(struct buf *bp); 40 int lmfs_bufs_in_use(void); 41 int lmfs_nr_bufs(void); 42 void lmfs_flushall(void); 43 int lmfs_fs_block_size(void); 44 void lmfs_may_use_vmcache(int); 45 void lmfs_set_blocksize(int blocksize, int major); 46 void lmfs_reset_rdwt_err(void); 47 int lmfs_rdwt_err(void); 48 void lmfs_buf_pool(int new_nr_bufs); 49 struct buf *lmfs_get_block(dev_t dev, block_t block,int only_search); 50 struct buf *lmfs_get_block_ino(dev_t dev, block_t block,int only_search, 51 ino_t ino, u64_t off); 52 void lmfs_invalidate(dev_t device); 53 void lmfs_put_block(struct buf *bp, int block_type); 54 void lmfs_rw_scattered(dev_t, struct buf **, int, int); 55 void lmfs_setquiet(int q); 56 int lmfs_do_bpeek(message *); 57 void lmfs_cache_reevaluate(dev_t dev); 58 void lmfs_blockschange(dev_t dev, int delta); 59 60 /* calls that libminixfs does into fs */ 61 void fs_blockstats(u64_t *blocks, u64_t *free, u64_t *used); 62 int fs_sync(void); 63 64 /* get_block arguments */ 65 #define NORMAL 0 /* forces get_block to do disk read */ 66 #define NO_READ 1 /* prevents get_block from doing disk read */ 67 #define PREFETCH 2 /* tells get_block not to read or mark dev */ 68 69 /* When a block is released, the type of usage is passed to put_block(). */ 70 #define ONE_SHOT 0200 /* set if block not likely to be needed soon */ 71 72 #define INODE_BLOCK 0 /* inode block */ 73 #define DIRECTORY_BLOCK 1 /* directory block */ 74 #define INDIRECT_BLOCK 2 /* pointer block */ 75 #define MAP_BLOCK 3 /* bit map */ 76 #define FULL_DATA_BLOCK 5 /* data, fully used */ 77 #define PARTIAL_DATA_BLOCK 6 /* data, partly used*/ 78 79 #define END_OF_FILE (-104) /* eof detected */ 80 81 #endif /* _MINIX_FSLIB_H */ 82 83