b1d068470b
isofs now uses an in-memory directory listing built on-the-fly instead of parsing the ISO 9660 data structures over and over for almost every request. This yields huge performance improvements. The directory listing is allocated dynamically, but Minix servers aren't normally supposed to do that because critical servers would crash if the system runs out of memory. isofs is quite frugal, won't allocate memory after having the whole directory tree cached and is not that critical (its most important job is to serve as a root file system during installation). The benefits and elegance of this scheme far outweights this small problem in practice. Change-Id: I13d070388c07d274cbee0645cbc50295c447c5b6
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* Function prototypes for iso9660 file system. */
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struct dir_record;
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struct dir_extent;
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struct rrii_dir_record;
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struct iso9660_dir_record;
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struct iso9660_vol_pri_desc;
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struct inode;
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struct inode_dir_entry;
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/* inode.c */
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int fs_putnode(ino_t ino_nr, unsigned int count);
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struct inode* get_inode(ino_t ino_nr);
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struct inode* open_inode(ino_t ino_nr);
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void put_inode(struct inode *i);
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void dup_inode(struct inode *i_node);
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int read_directory(struct inode *dir);
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int read_inode(struct inode_dir_entry *dir_entry, struct dir_extent *extent,
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size_t *offset);
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struct inode* inode_cache_get(ino_t ino_nr);
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void inode_cache_add(ino_t ino_nr, struct inode *i_node);
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int check_inodes(void);
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/* link.c */
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ssize_t fs_rdlink(ino_t ino_nr, struct fsdriver_data *data, size_t bytes);
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/* mount.c */
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int fs_mount(dev_t dev, unsigned int flags, struct fsdriver_node *root_node,
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unsigned int *res_flags);
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int fs_mountpt(ino_t ino_nr);
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void fs_unmount(void);
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/* path.c */
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int fs_lookup(ino_t ino_nr, char *name, struct fsdriver_node *node,
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int *is_mountpt);
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/* read.c */
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ssize_t fs_read(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
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off_t pos, int call);
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ssize_t fs_getdents(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
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off_t *pos);
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/* stadir.c */
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int fs_stat(ino_t ino_nr, struct stat *statbuf);
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int fs_statvfs(struct statvfs *st);
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/* super.c */
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int release_vol_pri_desc(struct iso9660_vol_pri_desc *vol_pri);
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int read_vds(struct iso9660_vol_pri_desc *v_pri, dev_t dev);
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/* susp.c */
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int parse_susp(struct rrii_dir_record *dir, char *buffer);
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void parse_susp_buffer(struct rrii_dir_record *dir, char *buffer, u32_t size);
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/* susp_rock_ridge.c */
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void parse_susp_rock_ridge_sl(struct rrii_dir_record *dir, char *buffer,
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int length);
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int parse_susp_rock_ridge(struct rrii_dir_record *dir, char *buffer);
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/* utility.c */
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void free_inode_dir_entry(struct inode_dir_entry *e);
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void free_extent(struct dir_extent *extent);
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struct buf* read_extent_block(struct dir_extent *e, size_t block);
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size_t get_extent_absolute_block_id(struct dir_extent *e, size_t block);
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time_t date7_to_time_t(const u8_t *date);
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void* alloc_mem(size_t s); |