From: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
This documents revoke file operation in Documentation/filesystems/vfs.txt.
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
---
Documentation/filesystems/vfs.txt | 5 +++++
1 file changed, 5 insertions(+)
Index: 2.6/Documentation/filesystems/vfs.txt
===================================================================
--- 2.6.orig/Documentation/filesystems/vfs.txt 2007-05-21 15:37:59.000000000 +0300
+++ 2.6/Documentation/filesystems/vfs.txt 2007-07-11 11:48:46.000000000 +0300
@@ -732,6 +732,7 @@ struct file_operations {
int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned
int);
+ int (*revoke)(struct file *);
};
Again, all methods are called without any locks being held, unless
@@ -805,6 +806,10 @@ otherwise noted.
splice_read: called by the VFS to splice data from file to a pipe. This
method is used by the splice(2) system call
+ revoke: called by revokeat(2) and frevoke(2) system calls to revoke access
+ to an open file. This method must ensure that all currently blocked
+ writes are flushed and reads will fail.
+
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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