bd3cde4571
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.
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/* Function prototypes for iso9660 file system. */
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struct dir_record;
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struct ext_attr_rec;
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struct iso9660_vd_pri;
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#include <minix/libminixfs.h>
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#define get_block(n) lmfs_get_block(fs_dev, n, NORMAL)
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#define put_block(n) lmfs_put_block(n, FULL_DATA_BLOCK)
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/* main.c */
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int main(void);
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void reply(int who, message *m_out);
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/* inode.c */
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int create_dir_record(struct dir_record *dir, char *buffer, u32_t
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address);
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int create_ext_attr(struct ext_attr_rec *ext, char *buffer);
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int fs_getnode(void);
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int fs_putnode(void);
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struct dir_record *get_dir_record(ino_t id_dir);
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struct dir_record *get_free_dir_record(void);
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struct ext_attr_rec *get_free_ext_attr(void);
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struct dir_record *load_dir_record_from_disk(u32_t address);
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int release_dir_record(struct dir_record *dir);
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/* misc.c */
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int fs_sync(void);
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int fs_new_driver(void);
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/* mount.c */
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int fs_readsuper(void);
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int fs_mountpoint(void);
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int fs_unmount(void);
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/* path.c */
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int fs_lookup(void);
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int advance(struct dir_record *dirp, char string[NAME_MAX], struct
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dir_record **resp);
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int search_dir(struct dir_record *ldir_ptr, char string [NAME_MAX],
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ino_t *numb);
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/* protect.c */
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int fs_access(void);
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/* read.c */
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int fs_read(void);
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int fs_bread(void);
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int fs_getdents(void);
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int read_chunk(struct dir_record *rip, u64_t position, unsigned off, int
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chunk, unsigned left, cp_grant_id_t gid, unsigned buf_off, int
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block_size, int *completed);
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/* stadir.c */
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int fs_stat(void);
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int fs_fstatfs(void);
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int fs_statvfs(void);
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/* super.c */
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int release_v_pri(struct iso9660_vd_pri *v_pri);
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int read_vds(struct iso9660_vd_pri *v_pri, dev_t dev);
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int create_v_pri(struct iso9660_vd_pri *v_pri, char *buffer, unsigned
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long address);
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/* utility.c */
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int do_noop(void);
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int no_sys(void);
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