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Commit d1195c51 authored by Pekka J Enberg's avatar Pekka J Enberg Committed by Jens Axboe
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[PATCH] vfs: add splice_write and splice_read to documentation 



This patch adds the new splice_write and splice_read file operations to
Documentation/filesystems/vfs.txt.

Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
parent 7519fdc9

Documentation/filesystems/vfs.txt

+11 −1
Original line number Diff line number Diff line
@@ -694,7 +694,7 @@ struct file_operations 
----------------------



This describes how the VFS can manipulate an open file. As of kernel

2.6.13, the following members are defined:

2.6.17, the following members are defined:



struct file_operations {

	loff_t (*llseek) (struct file *, loff_t, int);
@@ -723,6 +723,10 @@ struct file_operations { 
	int (*check_flags)(int);

	int (*dir_notify)(struct file *filp, unsigned long arg);

	int (*flock) (struct file *, int, struct file_lock *);

	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned 

int);

	ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned  

int);

};



Again, all methods are called without any locks being held, unless
@@ -790,6 +794,12 @@ otherwise noted. 


  flock: called by the flock(2) system call



  splice_write: called by the VFS to splice data from a pipe to a file. This

		method is used by the splice(2) system call



  splice_read: called by the VFS to splice data from file to a pipe. This

	       method is used by the splice(2) system call



Note that the file operations are implemented by the specific

filesystem in which the inode resides. When opening a device node

(character or block special) most filesystems will call special