6c46a77d95
- The lmfs_get_block*(3) API calls may now return an error. The idea is to encourage a next generation of file system services to do a better job at dealing with block read errors than the MFS-derived implementations do. These existing file systems have been changed to panic immediately upon getting a block read error, in order to let unchecked errors cause corruption. Note that libbdev already retries failing I/O operations a few times first. - The libminixfs block device I/O module (bio.c) now deals properly with end-of-file conditions on block devices. Since a device or partition size may not be a multiple of the root file system's block size, support for partial block retrival has been added, with a new internal lmfs_get_partial_block(3) call. A new test program, test85, tests the new handling of EOF conditions when reading, writing, and memory-mapping a block device. Change-Id: I05e35b6b8851488328a2679da635ebba0c6d08ce
112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
#ifndef EXT2_PROTO_H
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#define EXT2_PROTO_H
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#define put_block(n) lmfs_put_block(n)
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/* Function prototypes. */
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/* Structs used in prototypes must be declared as such first. */
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struct buf;
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struct filp;
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struct inode;
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struct super_block;
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/* balloc.c */
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void discard_preallocated_blocks(struct inode *rip);
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block_t alloc_block(struct inode *rip, block_t goal);
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void free_block(struct super_block *sp, bit_t bit);
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/* ialloc.c */
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struct inode *alloc_inode(struct inode *parent, mode_t bits, uid_t uid,
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gid_t gid);
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void free_inode(struct inode *rip);
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/* inode.c */
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void dup_inode(struct inode *ip);
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struct inode *find_inode(dev_t dev, ino_t numb);
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int fs_putnode(ino_t ino_nr, unsigned int count);
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void init_inode_cache(void);
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struct inode *get_inode(dev_t dev, ino_t numb);
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void put_inode(struct inode *rip);
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void update_times(struct inode *rip);
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void rw_inode(struct inode *rip, int rw_flag);
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/* link.c */
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int fs_trunc(ino_t ino_nr, off_t start, off_t end);
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int fs_link(ino_t dir_nr, char *name, ino_t ino_nr);
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int fs_rdlink(ino_t ino_nr, struct fsdriver_data *data, size_t bytes);
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int fs_rename(ino_t old_dir_nr, char *old_name, ino_t new_dir_nr,
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char *new_name);
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int fs_unlink(ino_t dir_nr, char *name, int call);
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int truncate_inode(struct inode *rip, off_t len);
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/* misc.c */
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void fs_sync(void);
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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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void fs_unmount(void);
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int fs_mountpt(ino_t ino_nr);
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/* open.c */
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int fs_create(ino_t dir_nr, char *name, mode_t mode, uid_t uid, gid_t gid,
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struct fsdriver_node *node);
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int fs_mkdir(ino_t dir_nr, char *name, mode_t mode, uid_t uid, gid_t gid);
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int fs_mknod(ino_t dir_nr, char *name, mode_t mode, uid_t uid, gid_t gid,
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dev_t dev);
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int fs_slink(ino_t dir_nr, char *name, uid_t uid, gid_t gid,
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struct fsdriver_data *data, size_t bytes);
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void fs_seek(ino_t ino_nr);
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/* path.c */
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int fs_lookup(ino_t dir_nr, char *name, struct fsdriver_node *node,
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int *is_mountpt);
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struct inode *advance(struct inode *dirp, const char *string);
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int search_dir(struct inode *ldir_ptr, const char *string, ino_t *numb,
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int flag, int ftype);
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/* protect.c */
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int fs_chmod(ino_t ino_nr, mode_t *mode);
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int fs_chown(ino_t ino_nr, uid_t uid, gid_t gid, mode_t *mode);
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/* read.c */
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ssize_t fs_readwrite(ino_t ino_nr, struct fsdriver_data *data, size_t bytes,
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off_t pos, int call);
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block_t rd_indir(struct buf *bp, int index);
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block_t read_map(struct inode *rip, off_t pos, int opportunistic);
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struct buf *get_block_map(register struct inode *rip, u64_t position);
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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 *posp);
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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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unsigned int get_block_size(dev_t dev);
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struct super_block *get_super(dev_t dev);
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int read_super(struct super_block *sp);
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void write_super(struct super_block *sp);
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struct group_desc* get_group_desc(unsigned int bnum);
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/* time.c */
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int fs_utime(ino_t ino, struct timespec *atime, struct timespec *mtime);
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/* utility.c */
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struct buf *get_block(dev_t dev, block_t block, int how);
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unsigned conv2(int norm, int w);
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long conv4(int norm, long x);
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int ansi_strcmp(register const char* ansi_s, register const char *s2,
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register size_t ansi_s_length);
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bit_t setbit(bitchunk_t *bitmap, bit_t max_bits, unsigned int word);
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bit_t setbyte(bitchunk_t *bitmap, bit_t max_bits);
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int unsetbit(bitchunk_t *bitmap, bit_t bit);
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/* write.c */
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struct buf *new_block(struct inode *rip, off_t position);
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void zero_block(struct buf *bp);
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int write_map(struct inode *, off_t, block_t, int);
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#endif /* EXT2_PROTO_H */
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