include/linux/fs.h

94 typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
226 	loff_t		ia_size;
328 	loff_t			ki_pos;
388 				loff_t pos, unsigned len, unsigned flags,
391 				loff_t pos, unsigned len, unsigned copied,
432 				loff_t pos, unsigned len, unsigned flags,
436 				loff_t pos, unsigned len, unsigned copied,
661 	loff_t			i_size;
850 static inline loff_t i_size_read(const struct inode *inode)  in i_size_read()
853 	loff_t i_size;  in i_size_read()
862 	loff_t i_size;  in i_size_read()
878 static inline void i_size_write(struct inode *inode, loff_t i_size)  in i_size_write()
924 	loff_t prev_pos;		/* Cache last read() position */
955 	loff_t			f_pos;
1004 #define MAX_LFS_FILESIZE	((loff_t)ULONG_MAX << PAGE_SHIFT)
1006 #define MAX_LFS_FILESIZE 	((loff_t)LLONG_MAX)
1109 	loff_t fl_start;
1110 	loff_t fl_end;
1144 #define OFFSET_MAX	INT_LIMIT(loff_t)
1455 	loff_t			s_maxbytes;	/* Max file size */
1821 typedef int (*filldir_t)(struct dir_context *, const char *, int, loff_t, u64,
1826 	loff_t pos;
1880 	loff_t (*llseek) (struct file *, loff_t, int);
1881 	ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
1882 	ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
1896 	int (*fsync) (struct file *, loff_t, loff_t, int datasync);
1899 	ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
1903 	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
1904 	ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
1906 	long (*fallocate)(struct file *file, int mode, loff_t offset,
1907 			  loff_t len);
1912 	ssize_t (*copy_file_range)(struct file *, loff_t, struct file *,
1913 			loff_t, size_t, unsigned int);
1914 	loff_t (*remap_file_range)(struct file *file_in, loff_t pos_in,
1915 				   struct file *file_out, loff_t pos_out,
1916 				   loff_t len, unsigned int remap_flags);
1917 	int (*fadvise)(struct file *, loff_t, loff_t, int);
1977 extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
1978 extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
1979 extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *,
1980 				   loff_t, size_t, unsigned int);
1981 extern ssize_t generic_copy_file_range(struct file *file_in, loff_t pos_in,
1982 				       struct file *file_out, loff_t pos_out,
1984 extern int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
1985 					 struct file *file_out, loff_t pos_out,
1986 					 loff_t *count,
1988 extern loff_t do_clone_file_range(struct file *file_in, loff_t pos_in,
1989 				  struct file *file_out, loff_t pos_out,
1990 				  loff_t len, unsigned int remap_flags);
1991 extern loff_t vfs_clone_file_range(struct file *file_in, loff_t pos_in,
1992 				   struct file *file_out, loff_t pos_out,
1993 				   loff_t len, unsigned int remap_flags);
1996 extern loff_t vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
1997 					struct file *dst_file, loff_t dst_pos,
1998 					loff_t len, unsigned int remap_flags);
2025 	ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
2026 	ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
2417 extern int locks_mandatory_area(struct inode *, struct file *, loff_t, loff_t, unsigned char);
2448 				    loff_t size)  in locks_verify_truncate()
2470                                        loff_t start, loff_t end, unsigned char type)  in locks_mandatory_area()
2600 extern long vfs_truncate(const struct path *, loff_t);
2601 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
2603 extern int vfs_fallocate(struct file *file, int mode, loff_t offset,
2604 			loff_t len);
2705 extern int filemap_fdatawait_range(struct address_space *, loff_t lstart,
2706 				   loff_t lend);
2708 		loff_t start_byte, loff_t end_byte);
2715 extern bool filemap_range_has_page(struct address_space *, loff_t lstart,
2716 				  loff_t lend);
2718 				        loff_t lstart, loff_t lend);
2720 				loff_t start, loff_t end, int sync_mode);
2722 				loff_t start, loff_t end);
2731 extern int __must_check file_fdatawait_range(struct file *file, loff_t lstart,
2732 						loff_t lend);
2735 						loff_t start, loff_t end);
2803 extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
2807 extern int sync_file_range(struct file *file, loff_t offset, loff_t nbytes,
2937 extern ssize_t kernel_read(struct file *, void *, size_t, loff_t *);
2938 ssize_t __kernel_read(struct file *file, void *buf, size_t count, loff_t *pos);
2939 extern ssize_t kernel_write(struct file *, const void *, size_t, loff_t *);
2940 extern ssize_t __kernel_write(struct file *, const void *, size_t, loff_t *);
2952 extern loff_t default_llseek(struct file *file, loff_t offset, int whence);
2954 extern loff_t vfs_llseek(struct file *file, loff_t offset, int whence);
3048 extern int generic_write_check_limits(struct file *file, loff_t pos,
3049 		loff_t *count);
3057 extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
3059 ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
3061 ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
3071 extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
3076 extern ssize_t generic_file_splice_read(struct file *, loff_t *,
3079 		struct file *, loff_t *, size_t, unsigned int);
3081 		struct file *out, loff_t *, size_t len, unsigned int flags);
3082 extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
3083 		loff_t *opos, size_t len, unsigned int flags);
3088 extern loff_t noop_llseek(struct file *file, loff_t offset, int whence);
3089 extern loff_t no_llseek(struct file *file, loff_t offset, int whence);
3090 extern loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize);
3091 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int whence);
3092 extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
3093 		int whence, loff_t maxsize, loff_t eof);
3094 extern loff_t fixed_size_llseek(struct file *file, loff_t offset,
3095 		int whence, loff_t size);
3096 extern loff_t no_seek_end_llseek_size(struct file *, loff_t, int, loff_t);
3097 extern loff_t no_seek_end_llseek(struct file *, loff_t, int);
3104 			    loff_t file_offset);
3182 void __inode_add_bytes(struct inode *inode, loff_t bytes);
3183 void inode_add_bytes(struct inode *inode, loff_t bytes);
3184 void __inode_sub_bytes(struct inode *inode, loff_t bytes);
3185 void inode_sub_bytes(struct inode *inode, loff_t bytes);
3186 static inline loff_t __inode_get_bytes(struct inode *inode)  in __inode_get_bytes()
3188 	return (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;  in __inode_get_bytes()
3190 loff_t inode_get_bytes(struct inode *inode);
3191 void inode_set_bytes(struct inode *inode, loff_t bytes);
3229 extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
3242 extern int noop_fsync(struct file *, loff_t, loff_t, int);
3250 			loff_t pos, unsigned len, unsigned flags,
3253 			loff_t pos, unsigned len, unsigned copied,
3261 extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
3274 			loff_t *ppos, const void *from, size_t available);
3275 extern ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos,
3278 extern int __generic_file_fsync(struct file *, loff_t, loff_t, int);
3279 extern int generic_file_fsync(struct file *, loff_t, loff_t, int);
3298 extern int inode_newsize_ok(const struct inode *, loff_t offset);
3396 				size_t size, loff_t *pos);
3443 			 size_t len, loff_t *ppos);
3445 			  size_t len, loff_t *ppos);
3449 		  void *buffer, size_t *lenp, loff_t *ppos);
3451 		  void *buffer, size_t *lenp, loff_t *ppos);
3453 		   void *buffer, size_t *lenp, loff_t *ppos);
3535 extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len,
3537 extern int generic_fadvise(struct file *file, loff_t offset, loff_t len,