Commit ae5e165d authored by Jeff Layton's avatar Jeff Layton
Browse files

fs: new API for handling inode->i_version 



Add a documentation blob that explains what the i_version field is, how
it is expected to work, and how it is currently implemented by various
filesystems.

We already have inode_inc_iversion. Add several other functions for
manipulating and accessing the i_version counter. For now, the
implementation is trivial and basically works the way that all of the
open-coded i_version accesses work today.

Future patches will convert existing users of i_version to use the new
API, and then convert the backend implementation to do things more
efficiently.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
parent 7a11ac28

fs/btrfs/file.c

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/slab.h>

#include <linux/btrfs.h>

#include <linux/uio.h>

#include <linux/iversion.h>

#include "ctree.h"

#include "disk-io.h"

#include "transaction.h"

fs/btrfs/inode.c

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include <linux/posix_acl_xattr.h>

#include <linux/uio.h>

#include <linux/magic.h>

#include <linux/iversion.h>

#include "ctree.h"

#include "disk-io.h"

#include "transaction.h"

fs/btrfs/ioctl.c

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ 
#include <linux/uuid.h>

#include <linux/btrfs.h>

#include <linux/uaccess.h>

#include <linux/iversion.h>

#include "ctree.h"

#include "disk-io.h"

#include "transaction.h"

fs/btrfs/xattr.c

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/xattr.h>

#include <linux/security.h>

#include <linux/posix_acl_xattr.h>

#include <linux/iversion.h>

#include "ctree.h"

#include "btrfs_inode.h"

#include "transaction.h"

fs/ext4/inode.c

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include <linux/slab.h>

#include <linux/bitops.h>

#include <linux/iomap.h>

#include <linux/iversion.h>



#include "ext4_jbd2.h"

#include "xattr.h"

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