mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
42cf11939b
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>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#include <linux/module.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/fs_stack.h>
|
|
|
|
/* does _NOT_ require i_mutex to be held.
|
|
*
|
|
* This function cannot be inlined since i_size_{read,write} is rather
|
|
* heavy-weight on 32-bit systems
|
|
*/
|
|
void fsstack_copy_inode_size(struct inode *dst, const struct inode *src)
|
|
{
|
|
i_size_write(dst, i_size_read((struct inode *)src));
|
|
dst->i_blocks = src->i_blocks;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
|
|
|
|
/* copy all attributes; get_nlinks is optional way to override the i_nlink
|
|
* copying
|
|
*/
|
|
void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
|
|
int (*get_nlinks)(struct inode *))
|
|
{
|
|
if (!get_nlinks)
|
|
dest->i_nlink = src->i_nlink;
|
|
else
|
|
dest->i_nlink = (*get_nlinks)(dest);
|
|
|
|
dest->i_mode = src->i_mode;
|
|
dest->i_uid = src->i_uid;
|
|
dest->i_gid = src->i_gid;
|
|
dest->i_rdev = src->i_rdev;
|
|
dest->i_atime = src->i_atime;
|
|
dest->i_mtime = src->i_mtime;
|
|
dest->i_ctime = src->i_ctime;
|
|
dest->i_blkbits = src->i_blkbits;
|
|
dest->i_flags = src->i_flags;
|
|
|
|
fsstack_copy_inode_size(dest, src);
|
|
}
|
|
EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
|