File Operations - File Operations struct file_operations...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
File Operations struct file_operations { struct module *owner; loff_t(*llseek) (struct file *, loff_t, int); ssize_t(*read) (struct file *, char __user *, size_t, loff_t *); ssize_t(*aio_read) (struct kiocb *, char __user *, size_t, loff_t); ssize_t(*write) (struct file *, const char __user *, size_t, loff_t *); ssize_t(*aio_write) (struct kiocb *, const char __user *, size_t, loff_t); int (*readdir) (struct file *, void *, filldir_t); unsigned int (*poll) (struct file *, struct poll_table_struct *); int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long); int (*mmap) (struct file *, struct vm_area_struct *);
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
File Operations int (*release) (struct inode *, struct file *); int (*fsync) (struct file *, struct dentry *, int datasync); int (*aio_fsync) (struct kiocb *, int datasync); int (*fasync) (int, struct file *, int); int (*lock) (struct file *, int, struct file_lock *); ssize_t(*readv) (struct file *, const struct iovec *, unsigned long, loff_t *); ssize_t(*writev) (struct file *, const struct iovec *, unsigned long, loff_t *); ssize_t(*sendfile) (struct file *, loff_t *, size_t, read_actor_t, void __user *); ssize_t(*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int); unsigned long (*get_unmapped_area) (struct file *, unsigned long, unsigned long, unsigned long,
Background image of page 2
Registering a Device Driver A device driver loadable module defines a “struct file_operations” in a static place in memory In init_module it fills up the pointers to the functions that defines the driver in the struct. Initiallize to null (or leave 0) in the entries that are not
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2012 for the course CS 354 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 14

File Operations - File Operations struct file_operations...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online