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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 19:45:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 19:45:12 -0700 |
| commit | 96ed320d527eb071389f69cbd6772440805af7d7 (patch) | |
| tree | d6ddd534c262fe4adcb1a6e23427317a105dbd93 /include/uapi | |
| parent | Merge tag 'xfs-5.8-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux (diff) | |
| parent | Documentation/dax: Update Usage section (diff) | |
| download | wireguard-linux-96ed320d527eb071389f69cbd6772440805af7d7.tar.xz wireguard-linux-96ed320d527eb071389f69cbd6772440805af7d7.zip | |
Merge tag 'vfs-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull DAX updates part one from Darrick Wong:
"After many years of LKML-wrangling about how to enable programs to
query and influence the file data access mode (DAX) when a filesystem
resides on storage devices such as persistent memory, Ira Weiny has
emerged with a proposed set of standard behaviors that has not been
shot down by anyone! We're more or less standardizing on the current
XFS behavior and adapting ext4 to do the same.
This is the first of a handful pull requests that will make ext4 and
XFS present a consistent interface for user programs that care about
DAX. We add a statx attribute that programs can check to see if DAX is
enabled on a particular file. Then, we update the DAX documentation to
spell out the user-visible behaviors that filesystems will guarantee
(until the next storage industry shakeup). The on-disk inode flag has
been in XFS for a few years now.
Summary:
- Clean up io_is_direct.
- Add a new statx flag to indicate when file data access is being
done via DAX (as opposed to the page cache).
- Update the documentation for how system administrators and
application programmers can take advantage of the (still
experimental DAX) feature"
Link: https://lore.kernel.org/lkml/20200505002016.1085071-1-ira.weiny@intel.com/
* tag 'vfs-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
Documentation/dax: Update Usage section
fs/stat: Define DAX statx attribute
fs: Remove unneeded IS_DAX() check in io_is_direct()
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/stat.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/stat.h b/include/uapi/linux/stat.h index 6df9348bb277..82cc58fe9368 100644 --- a/include/uapi/linux/stat.h +++ b/include/uapi/linux/stat.h @@ -183,6 +183,7 @@ struct statx { #define STATX_ATTR_AUTOMOUNT 0x00001000 /* Dir: Automount trigger */ #define STATX_ATTR_MOUNT_ROOT 0x00002000 /* Root of a mount */ #define STATX_ATTR_VERITY 0x00100000 /* [I] Verity protected file */ +#define STATX_ATTR_DAX 0x00002000 /* [I] File is DAX */ #endif /* _UAPI_LINUX_STAT_H */ |