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[PATCH] fsstack: Introduce fsstack_copy_{attr,inode}_*

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Introduce several fsstack_copy_* functions which allow stackable filesystems
(such as eCryptfs and Unionfs) to easily copy over (currently only) inode
attributes.  This prevents code duplication and allows for code reuse.

[akpm@osdl.org: Remove unneeded wrapper]
[bunk@stusta.de: fs/stack.c should #include <linux/fs_stack.h>]
Signed-off-by: Josef "Jeff" Sipek <jsipek@cs.sunysb.edu>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Josef "Jeff" Sipek 2006-12-08 02:36:31 -08:00 • committed by Linus Torvalds
parent 17b3cff079
commit 42cf11939b
3 changed files with 73 additions and 1 deletions
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31
include/linux/fs_stack.h Normal file
View file

@ -0,0 +1,31 @@
#ifndef _LINUX_FS_STACK_H
#define _LINUX_FS_STACK_H
/* This file defines generic functions used primarily by stackable
* filesystems; none of these functions require i_mutex to be held.
*/
#include <linux/fs.h>
/* externs for fs/stack.c */
extern void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
int (*get_nlinks)(struct inode *));
extern void fsstack_copy_inode_size(struct inode *dst, const struct inode *src);
/* inlines */
static inline void fsstack_copy_attr_atime(struct inode *dest,
const struct inode *src)
{
dest->i_atime = src->i_atime;
}
static inline void fsstack_copy_attr_times(struct inode *dest,
const struct inode *src)
{
dest->i_atime = src->i_atime;
dest->i_mtime = src->i_mtime;
dest->i_ctime = src->i_ctime;
}
#endif /* _LINUX_FS_STACK_H */