[4/8] xfs_db: access realtime file blocks

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:19 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Now that we have the ability to point the io cursor at the realtime
device, let's make it so that the "dblock" command can walk the contents
of realtime files.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 db/block.c |   17 +++++++++++++++--
 db/faddr.c |    4 +++-
 2 files changed, 18 insertions(+), 3 deletions(-)

Patch

diff --git a/db/block.c b/db/block.c
index d064fbed5aa..ae8744685b0 100644
--- a/db/block.c
+++ b/db/block.c
@@ -195,6 +195,13 @@  dblock_help(void)
 ));
 }
 
+static inline bool
+is_rtfile(
+	struct xfs_dinode	*dip)
+{
+	return dip->di_flags & cpu_to_be16(XFS_DIFLAG_REALTIME);
+}
+
 static int
 dblock_f(
 	int		argc,
@@ -234,8 +241,14 @@  dblock_f(
 	ASSERT(typtab[type].typnm == type);
 	if (nex > 1)
 		make_bbmap(&bbmap, nex, bmp);
-	set_cur(&typtab[type], (int64_t)XFS_FSB_TO_DADDR(mp, dfsbno),
-		nb * blkbb, DB_RING_ADD, nex > 1 ? &bbmap : NULL);
+	if (is_rtfile(iocur_top->data))
+		set_rt_cur(&typtab[type], (int64_t)XFS_FSB_TO_DADDR(mp, dfsbno),
+				nb * blkbb, DB_RING_ADD,
+				nex > 1 ? &bbmap : NULL);
+	else
+		set_cur(&typtab[type], (int64_t)XFS_FSB_TO_DADDR(mp, dfsbno),
+				nb * blkbb, DB_RING_ADD,
+				nex > 1 ? &bbmap : NULL);
 	free(bmp);
 	return 0;
 }
diff --git a/db/faddr.c b/db/faddr.c
index ec4aae68bb5..fd65b86b5e9 100644
--- a/db/faddr.c
+++ b/db/faddr.c
@@ -323,7 +323,9 @@  fa_drtbno(
 		dbprintf(_("null block number, cannot set new addr\n"));
 		return;
 	}
-	/* need set_cur to understand rt subvolume */
+
+	set_rt_cur(&typtab[next], (int64_t)XFS_FSB_TO_BB(mp, bno), blkbb,
+			DB_RING_ADD, NULL);
 }
 
 /*ARGSUSED*/