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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-09-08 13:33:02 +1000 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-09-08 13:33:02 +1000 |
| commit | afcda10ce363d7a4f17a7797914aa6b99c23bd93 (patch) | |
| tree | 263d4b34fd80f194c2ffdfa56362eb400402cd96 | |
| parent | 3db09b627cc3ebd182491ef3461e452b6cab8f34 (diff) | |
| download | xfs-documentation-afcda10ce363d7a4f17a7797914aa6b99c23bd93.tar.gz | |
xfsdocs: update the on-disk format with changes for Linux 4.5
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
| -rw-r--r-- | design/XFS_Filesystem_Structure/ondisk_inode.asciidoc | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc index 4aabc55..dc1fad2 100644 --- a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc +++ b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc @@ -66,9 +66,10 @@ of the literal area and +di_forkoff+. The attribute fork is located between [[Inode_Core]] == Inode Core -The inode's core is 96 bytes in size and contains information about the file -itself including most stat data information about data and attribute forks after -the core within the inode. It uses the following structure: +The inode's core is 96 bytes on a V4 filesystem and 176 bytes on a V5 +filesystem. It contains information about the file itself including most stat +data information about data and attribute forks after the core within the +inode. It uses the following structure: [source, c] ---- @@ -313,8 +314,16 @@ Counts the number of changes made to the attributes in this inode. Log sequence number of the last inode write. *di_flags2*:: -Specifies extended flags associated with a v3 inode. There are no flags defined -currently. +Specifies extended flags associated with a v3 inode. + +.Version 3 Inode flags +[options="header"] +|===== +| Flag | Description +| +XFS_DIFLAG2_DAX+ | +For a file, enable DAX to increase performance on persistent-memory storage. +If set on a directory, files created in the directory will inherit this flag. +|===== *di_pad2*:: Padding for future expansion of the inode. |