[PATCH 5/9] xfs_db: report parent pointer keys

From: "Darrick J. Wong" <djwong@kernel.org>
To: djwong@kernel.org
Cc: allison.henderson@oracle.com, linux-xfs@vger.kernel.org
Subject: [PATCH 5/9] xfs_db: report parent pointer keys
Date: Thu, 16 Mar 2023 12:27:12 -0700	[thread overview]
Message-ID: <167899415442.16278.1927282731092038026.stgit@frogsfrogsfrogs> (raw)
In-Reply-To: <167899415375.16278.9528475200288521209.stgit@frogsfrogsfrogs>

From: Darrick J. Wong <djwong@kernel.org>

Decode the parent pointer inode, generation, and diroffset fields.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 db/attr.c      |   31 +++++++++++++++++++++++++++++++
 db/attrshort.c |   25 +++++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/db/attr.c b/db/attr.c
index f29e4a544..db7cf54b5 100644
--- a/db/attr.c
+++ b/db/attr.c
@@ -19,6 +19,7 @@ static int	attr_leaf_entries_count(void *obj, int startoff);
 static int	attr_leaf_hdr_count(void *obj, int startoff);
 static int	attr_leaf_name_local_count(void *obj, int startoff);
 static int	attr_leaf_name_local_name_count(void *obj, int startoff);
+static int	attr_leaf_name_pptr_count(void *obj, int startoff);
 static int	attr_leaf_name_local_value_count(void *obj, int startoff);
 static int	attr_leaf_name_local_value_offset(void *obj, int startoff,
 						  int idx);
@@ -111,6 +112,8 @@ const field_t	attr_leaf_map_flds[] = {
 
 #define	LNOFF(f)	bitize(offsetof(xfs_attr_leaf_name_local_t, f))
 #define	LVOFF(f)	bitize(offsetof(xfs_attr_leaf_name_remote_t, f))
+#define	PPOFF(f)	bitize(offsetof(xfs_attr_leaf_name_local_t, nameval) + \
+			       offsetof(struct xfs_parent_name_rec, f))
 const field_t	attr_leaf_name_flds[] = {
 	{ "valuelen", FLDT_UINT16D, OI(LNOFF(valuelen)),
 	  attr_leaf_name_local_count, FLD_COUNT, TYP_NONE },
@@ -118,6 +121,12 @@ const field_t	attr_leaf_name_flds[] = {
 	  attr_leaf_name_local_count, FLD_COUNT, TYP_NONE },
 	{ "name", FLDT_CHARNS, OI(LNOFF(nameval)),
 	  attr_leaf_name_local_name_count, FLD_COUNT, TYP_NONE },
+	{ "parent_ino", FLDT_INO, OI(PPOFF(p_ino)),
+	  attr_leaf_name_pptr_count, FLD_COUNT, TYP_INODE },
+	{ "parent_gen", FLDT_UINT32D, OI(PPOFF(p_gen)),
+	  attr_leaf_name_pptr_count, FLD_COUNT, TYP_NONE },
+	{ "parent_diroffset", FLDT_UINT32D, OI(PPOFF(p_diroffset)),
+	  attr_leaf_name_pptr_count, FLD_COUNT, TYP_NONE },
 	{ "value", FLDT_CHARNS, attr_leaf_name_local_value_offset,
 	  attr_leaf_name_local_value_count, FLD_COUNT|FLD_OFFSET, TYP_NONE },
 	{ "valueblk", FLDT_UINT32X, OI(LVOFF(valueblk)),
@@ -273,6 +282,26 @@ attr_leaf_name_local_count(
 				    __attr_leaf_name_local_count);
 }
 
+static int
+__attr_leaf_name_pptr_count(
+	struct xfs_attr_leafblock	*leaf,
+	struct xfs_attr_leaf_entry      *e,
+	int				i)
+{
+	if (e->flags & XFS_ATTR_PARENT)
+		return 1;
+	return 0;
+}
+
+static int
+attr_leaf_name_pptr_count(
+	void				*obj,
+	int				startoff)
+{
+	return attr_leaf_entry_walk(obj, startoff,
+			__attr_leaf_name_pptr_count);
+}
+
 static int
 __attr_leaf_name_local_name_count(
 	struct xfs_attr_leafblock	*leaf,
@@ -283,6 +312,8 @@ __attr_leaf_name_local_name_count(
 
 	if (!(e->flags & XFS_ATTR_LOCAL))
 		return 0;
+	if (e->flags & XFS_ATTR_PARENT)
+		return 0;
 
 	l = xfs_attr3_leaf_name_local(leaf, i);
 	return l->namelen;
diff --git a/db/attrshort.c b/db/attrshort.c
index 872d771d5..7c8ac485d 100644
--- a/db/attrshort.c
+++ b/db/attrshort.c
@@ -13,6 +13,7 @@
 #include "attrshort.h"
 
 static int	attr_sf_entry_name_count(void *obj, int startoff);
+static int	attr_sf_entry_pptr_count(void *obj, int startoff);
 static int	attr_sf_entry_value_count(void *obj, int startoff);
 static int	attr_sf_entry_value_offset(void *obj, int startoff, int idx);
 static int	attr_shortform_list_count(void *obj, int startoff);
@@ -34,6 +35,8 @@ const field_t	attr_sf_hdr_flds[] = {
 };
 
 #define	EOFF(f)	bitize(offsetof(struct xfs_attr_sf_entry, f))
+#define	PPOFF(f) bitize(offsetof(struct xfs_attr_sf_entry, nameval) + \
+			offsetof(struct xfs_parent_name_rec, f))
 const field_t	attr_sf_entry_flds[] = {
 	{ "namelen", FLDT_UINT8D, OI(EOFF(namelen)), C1, 0, TYP_NONE },
 	{ "valuelen", FLDT_UINT8D, OI(EOFF(valuelen)), C1, 0, TYP_NONE },
@@ -49,11 +52,31 @@ const field_t	attr_sf_entry_flds[] = {
 	  TYP_NONE },
 	{ "name", FLDT_CHARNS, OI(EOFF(nameval)), attr_sf_entry_name_count,
 	  FLD_COUNT, TYP_NONE },
+	{ "parent_ino", FLDT_INO, OI(PPOFF(p_ino)), attr_sf_entry_pptr_count,
+	  FLD_COUNT, TYP_INODE },
+	{ "parent_gen", FLDT_UINT32D, OI(PPOFF(p_gen)), attr_sf_entry_pptr_count,
+	  FLD_COUNT, TYP_NONE },
+	{ "parent_diroffset", FLDT_UINT32D, OI(PPOFF(p_diroffset)),
+	   attr_sf_entry_pptr_count, FLD_COUNT, TYP_NONE },
 	{ "value", FLDT_CHARNS, attr_sf_entry_value_offset,
 	  attr_sf_entry_value_count, FLD_COUNT|FLD_OFFSET, TYP_NONE },
 	{ NULL }
 };
 
+static int
+attr_sf_entry_pptr_count(
+	void				*obj,
+	int				startoff)
+{
+	struct xfs_attr_sf_entry	*e;
+
+	ASSERT(bitoffs(startoff) == 0);
+	e = (struct xfs_attr_sf_entry *)((char *)obj + byteize(startoff));
+	if (e->flags & XFS_ATTR_PARENT)
+		return 1;
+	return 0;
+}
+
 static int
 attr_sf_entry_name_count(
 	void				*obj,
@@ -63,6 +86,8 @@ attr_sf_entry_name_count(
 
 	ASSERT(bitoffs(startoff) == 0);
 	e = (struct xfs_attr_sf_entry *)((char *)obj + byteize(startoff));
+	if (e->flags & XFS_ATTR_PARENT)
+		return 0;
 	return e->namelen;
 }
 

