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authorJeff Layton <jlayton@redhat.com>2018-01-29 14:41:30 +0300
committerJeff Layton <jlayton@redhat.com>2018-01-29 14:41:30 +0300
commitae5e165d855dd978a461b22175531b07f54fb61f (patch)
tree8b603c15aff71082d3d9e67b7eab089396349ce0 /fs/ext4
parent7a11ac289c437cb06633620940b191a63dec1f4a (diff)
downloadlinux-ae5e165d855dd978a461b22175531b07f54fb61f.tar.xz
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: Jeff Layton <jlayton@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/inode.c1
-rw-r--r--fs/ext4/namei.c1
2 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 7df2c5644e59..fa5d8bc52d2d 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -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"
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 798b3ac680db..bcf0dff517be 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -34,6 +34,7 @@
#include <linux/quotaops.h>
#include <linux/buffer_head.h>
#include <linux/bio.h>
+#include <linux/iversion.h>
#include "ext4.h"
#include "ext4_jbd2.h"