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Date:   Tue,  4 Apr 2023 16:52:58 +0200
From:   Andrey Albershteyn <aalbersh@...hat.com>
To:     djwong@...nel.org, dchinner@...hat.com, ebiggers@...nel.org,
        hch@...radead.org, linux-xfs@...r.kernel.org,
        fsverity@...ts.linux.dev
Cc:     rpeterso@...hat.com, agruenba@...hat.com, xiang@...nel.org,
        chao@...nel.org, damien.lemoal@...nsource.wdc.com, jth@...nel.org,
        linux-erofs@...ts.ozlabs.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        cluster-devel@...hat.com,
        Allison Henderson <allison.henderson@...cle.com>,
        Mark Tinguely <tinguely@....com>
Subject: [PATCH v2 02/23] xfs: add parent pointer support to attribute code

From: Allison Henderson <allison.henderson@...cle.com>

Add the new parent attribute type. XFS_ATTR_PARENT is used only for parent pointer
entries; it uses reserved blocks like XFS_ATTR_ROOT.

Signed-off-by: Mark Tinguely <tinguely@....com>
Signed-off-by: Dave Chinner <dchinner@...hat.com>
Signed-off-by: Allison Henderson <allison.henderson@...cle.com>
Reviewed-by: Darrick J. Wong <djwong@...nel.org>
---
 fs/xfs/libxfs/xfs_attr.c       | 4 +++-
 fs/xfs/libxfs/xfs_da_format.h  | 5 ++++-
 fs/xfs/libxfs/xfs_log_format.h | 1 +
 fs/xfs/scrub/attr.c            | 2 +-
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index b1dbed7655e8..101823772bf9 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -976,11 +976,13 @@ xfs_attr_set(
 	struct xfs_inode	*dp = args->dp;
 	struct xfs_mount	*mp = dp->i_mount;
 	struct xfs_trans_res	tres;
-	bool			rsvd = (args->attr_filter & XFS_ATTR_ROOT);
+	bool			rsvd;
 	int			error, local;
 	int			rmt_blks = 0;
 	unsigned int		total;
 
+	rsvd = (args->attr_filter & (XFS_ATTR_ROOT | XFS_ATTR_PARENT)) != 0;
+
 	if (xfs_is_shutdown(dp->i_mount))
 		return -EIO;
 
diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h
index 25e2841084e1..3dc03968bba6 100644
--- a/fs/xfs/libxfs/xfs_da_format.h
+++ b/fs/xfs/libxfs/xfs_da_format.h
@@ -688,12 +688,15 @@ struct xfs_attr3_leafblock {
 #define	XFS_ATTR_LOCAL_BIT	0	/* attr is stored locally */
 #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_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_INCOMPLETE	(1u << XFS_ATTR_INCOMPLETE_BIT)
-#define XFS_ATTR_NSP_ONDISK_MASK	(XFS_ATTR_ROOT | XFS_ATTR_SECURE)
+#define XFS_ATTR_NSP_ONDISK_MASK \
+			(XFS_ATTR_ROOT | XFS_ATTR_SECURE | XFS_ATTR_PARENT)
 
 /*
  * 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 ae9c99762a24..727b5a858028 100644
--- a/fs/xfs/libxfs/xfs_log_format.h
+++ b/fs/xfs/libxfs/xfs_log_format.h
@@ -967,6 +967,7 @@ struct xfs_icreate_log {
  */
 #define XFS_ATTRI_FILTER_MASK		(XFS_ATTR_ROOT | \
 					 XFS_ATTR_SECURE | \
+					 XFS_ATTR_PARENT | \
 					 XFS_ATTR_INCOMPLETE)
 
 /*
diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index 31529b9bf389..9d2e33743ecd 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -441,7 +441,7 @@ xchk_xattr_rec(
 	/* Retrieve the entry and check it. */
 	hash = be32_to_cpu(ent->hashval);
 	badflags = ~(XFS_ATTR_LOCAL | XFS_ATTR_ROOT | XFS_ATTR_SECURE |
-			XFS_ATTR_INCOMPLETE);
+			XFS_ATTR_INCOMPLETE | XFS_ATTR_PARENT);
 	if ((ent->flags & badflags) != 0)
 		xchk_da_set_corrupt(ds, level);
 	if (ent->flags & XFS_ATTR_LOCAL) {
-- 
2.38.4

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