From: Eric Sandeen <sandeen@redhat.com>
To: torvalds@linux-foundation.org,
Miklos Szeredi <mszeredi@redhat.com>,
Ira Weiny <ira.weiny@intel.com>,
David Howells <dhowells@redhat.com>
Cc: linux-fsdevel@vger.kernel.org, linux-man@vger.kernel.org,
linux-kernel@vger.kernel.org, xfs <linux-xfs@vger.kernel.org>,
linux-ext4@vger.kernel.org, Xiaoli Feng <xifeng@redhat.com>
Subject: [PATCH 1/2] uapi: fix statx attribute value overlap for DAX & MOUNT_ROOT
Date: Tue, 1 Dec 2020 10:57:11 -0600 [thread overview]
Message-ID: <7027520f-7c79-087e-1d00-743bdefa1a1e@redhat.com> (raw)
In-Reply-To: <e388f379-cd11-a5d2-db82-aa1aa518a582@redhat.com>
STATX_ATTR_MOUNT_ROOT and STATX_ATTR_DAX got merged with the same value,
so one of them needs fixing. Move STATX_ATTR_DAX.
While we're in here, clarify the value-matching scheme for some of the
attributes, and explain why the value for DAX does not match.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---
include/uapi/linux/stat.h | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/include/uapi/linux/stat.h b/include/uapi/linux/stat.h
index 82cc58fe9368..9ad19eb9bbbf 100644
--- a/include/uapi/linux/stat.h
+++ b/include/uapi/linux/stat.h
@@ -171,9 +171,10 @@ struct statx {
* be of use to ordinary userspace programs such as GUIs or ls rather than
* specialised tools.
*
- * Note that the flags marked [I] correspond to generic FS_IOC_FLAGS
+ * Note that the flags marked [I] correspond to the FS_IOC_SETFLAGS flags
* semantically. Where possible, the numerical value is picked to correspond
- * also.
+ * also. Note that the DAX attribute indicates that the inode is currently
+ * DAX-enabled, not simply that the per-inode flag has been set.
*/
#define STATX_ATTR_COMPRESSED 0x00000004 /* [I] File is compressed by the fs */
#define STATX_ATTR_IMMUTABLE 0x00000010 /* [I] File is marked immutable */
@@ -183,7 +184,7 @@ 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 */
+#define STATX_ATTR_DAX 0x00400000 /* File is currently DAX-enabled */
#endif /* _UAPI_LINUX_STAT_H */
--
2.17.0
next prev parent reply other threads:[~2020-12-01 16:58 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-01 16:54 [PATCH 0/2] statx: Fix DAX attribute collision and handling Eric Sandeen
2020-12-01 16:57 ` Eric Sandeen [this message]
2020-12-01 17:32 ` [PATCH 1/2] uapi: fix statx attribute value overlap for DAX & MOUNT_ROOT Darrick J. Wong
2020-12-01 17:44 ` Eric Sandeen
2020-12-01 18:31 ` Andreas Dilger
2020-12-01 18:36 ` Eric Sandeen
2020-12-02 2:16 ` Ira Weiny
2020-12-02 20:42 ` Linus Torvalds
2020-12-03 2:45 ` Ira Weiny
2020-12-03 18:04 ` Linus Torvalds
2020-12-01 16:59 ` [PATCH 2/2] statx: move STATX_ATTR_DAX attribute handling to filesystems Eric Sandeen
2020-12-01 17:39 ` Darrick J. Wong
2020-12-01 17:53 ` Eric Sandeen
2020-12-01 20:52 ` Dave Chinner
2020-12-01 22:03 ` Eric Sandeen
2020-12-01 22:12 ` Linus Torvalds
2020-12-01 22:26 ` Eric Sandeen
2020-12-02 2:29 ` Ira Weiny
2020-12-02 8:03 ` Christoph Hellwig
2020-12-01 20:04 ` Linus Torvalds
2020-12-01 20:50 ` Eric Sandeen
2020-12-01 21:04 ` David Howells
2020-12-01 22:09 ` Linus Torvalds
2020-12-02 0:11 ` Eric Sandeen
2020-12-01 17:18 ` [PATCH 1/2] uapi: fix statx attribute value overlap for DAX & MOUNT_ROOT David Howells
2020-12-01 17:20 ` [PATCH 2/2] statx: move STATX_ATTR_DAX attribute handling to filesystems David Howells
2020-12-01 17:28 ` David Howells
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