[PATCH RFC 14/29] xfs: add attribute type for fs-verity

[Andrey Albershteyn <aalbersh@redhat.com>]

From: Andrey Albershteyn <aalbersh@redhat.com>

The fsverity descriptor is stored in the extended attributes of the
inode. Add new attribute type for fs-verity metadata. Add
XFS_ATTR_INTERNAL_MASK to skip parent pointer and fs-verity attributes
as those are only for internal use. While we're at it add a few comments
in relevant places that internally visible attributes are not suppose to
be handled via interface defined in xfs_xattr.c.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
---
 fs/xfs/libxfs/xfs_da_format.h  | 11 ++++++++---
 fs/xfs/libxfs/xfs_log_format.h |  1 +
 fs/xfs/xfs_trace.h             |  3 ++-
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h
index 86de99e2f757..e5274be2fe9c 100644
--- a/fs/xfs/libxfs/xfs_da_format.h
+++ b/fs/xfs/libxfs/xfs_da_format.h
@@ -715,19 +715,23 @@ struct xfs_attr3_leafblock {
 #define	XFS_ATTR_ROOT_BIT	1	/* limit access to trusted attrs */
 #define	XFS_ATTR_SECURE_BIT	2	/* limit access to secure attrs */
 #define	XFS_ATTR_PARENT_BIT	3	/* parent pointer attrs */
+#define	XFS_ATTR_VERITY_BIT	4	/* verity descriptor */
 #define	XFS_ATTR_INCOMPLETE_BIT	7	/* attr in middle of create/delete */
 #define XFS_ATTR_LOCAL		(1u << XFS_ATTR_LOCAL_BIT)
 #define XFS_ATTR_ROOT		(1u << XFS_ATTR_ROOT_BIT)
 #define XFS_ATTR_SECURE		(1u << XFS_ATTR_SECURE_BIT)
 #define XFS_ATTR_PARENT		(1u << XFS_ATTR_PARENT_BIT)
+#define XFS_ATTR_VERITY		(1u << XFS_ATTR_VERITY_BIT)
 #define XFS_ATTR_INCOMPLETE	(1u << XFS_ATTR_INCOMPLETE_BIT)
 
 #define XFS_ATTR_NSP_ONDISK_MASK	(XFS_ATTR_ROOT | \
 					 XFS_ATTR_SECURE | \
-					 XFS_ATTR_PARENT)
+					 XFS_ATTR_PARENT | \
+					 XFS_ATTR_VERITY)
 
 /* Private attr namespaces not exposed to userspace */
-#define XFS_ATTR_PRIVATE_NSP_MASK	(XFS_ATTR_PARENT)
+#define XFS_ATTR_PRIVATE_NSP_MASK	(XFS_ATTR_PARENT | \
+					 XFS_ATTR_VERITY)
 
 #define XFS_ATTR_ONDISK_MASK	(XFS_ATTR_NSP_ONDISK_MASK | \
 				 XFS_ATTR_LOCAL | \
@@ -737,7 +741,8 @@ struct xfs_attr3_leafblock {
 	{ XFS_ATTR_LOCAL,	"local" }, \
 	{ XFS_ATTR_ROOT,	"root" }, \
 	{ XFS_ATTR_SECURE,	"secure" }, \
-	{ XFS_ATTR_PARENT,	"parent" }
+	{ XFS_ATTR_PARENT,	"parent" }, \
+	{ XFS_ATTR_VERITY,	"verity" }
 
 /*
  * Alignment for namelist and valuelist entries (since they are mixed
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h
index 0d637c276db0..57721f092c80 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -1051,6 +1051,7 @@ struct xfs_icreate_log {
 #define XFS_ATTRI_FILTER_MASK		(XFS_ATTR_ROOT | \
 					 XFS_ATTR_SECURE | \
 					 XFS_ATTR_PARENT | \
+					 XFS_ATTR_VERITY | \
 					 XFS_ATTR_INCOMPLETE)
 
 /*
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index ba45d801df1c..50034c059e8c 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -108,7 +108,8 @@ struct xfs_open_zone;
 	{ XFS_ATTR_ROOT,	"ROOT" }, \
 	{ XFS_ATTR_SECURE,	"SECURE" }, \
 	{ XFS_ATTR_INCOMPLETE,	"INCOMPLETE" }, \
-	{ XFS_ATTR_PARENT,	"PARENT" }
+	{ XFS_ATTR_PARENT,	"PARENT" }, \
+	{ XFS_ATTR_VERITY,	"VERITY" }
 
 DECLARE_EVENT_CLASS(xfs_attr_list_class,
 	TP_PROTO(struct xfs_attr_list_context *ctx),

-- 
2.50.0