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| author | Jeff Layton <jlayton@redhat.com> | 2018-01-29 14:41:30 +0300 |
|---|---|---|
| committer | Jeff Layton <jlayton@redhat.com> | 2018-01-29 14:41:30 +0300 |
| commit | ae5e165d855dd978a461b22175531b07f54fb61f (patch) | |
| tree | 8b603c15aff71082d3d9e67b7eab089396349ce0 /fs/ext4 | |
| parent | 7a11ac289c437cb06633620940b191a63dec1f4a (diff) | |
| download | linux-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.c | 1 | ||||
| -rw-r--r-- | fs/ext4/namei.c | 1 |
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" |