Mailing List Archive

From: Pekka Enberg <penberg@cs.helsinki.fi>

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

Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---

vfs.txt | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index adaa899..73a79c0 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -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 +723,8 @@ 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 inode *, struct file *, size_t, unsigned int);
+ ssize_t (*splice_read)(struct file *, struct inode *, size_t, unsigned int);
};

Again, all methods are called without any locks being held, unless
@@ -790,6 +792,12 @@ 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
-
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