From: Darrick J. Wong <djwong@kernel.org>
Date: Tue, 12 Jul 2022 18:24:33 +0000 (-0500)
Subject: xfs_db: identify the minlogsize transaction reservation
X-Git-Tag: v5.19.0-rc1~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=766bfbd71f5cf596b5aec66772eb8326fdb3dd63;p=thirdparty%2Fxfsprogs-dev.git

xfs_db: identify the minlogsize transaction reservation

Right now, we don't make it easy to spot the transaction reservation
used to compute the minimum log size in userspace:

# xfs_db -c logres /dev/sda
type 0 logres 168184 logcount 5 flags 0x4
...
type 25 logres 760 logcount 0 flags 0x0
type -1 logres 547200 logcount 8 flags 0x4

Type "-1" doesn't communicate the purpose at all, it just looks like a
math error.  Help out the user a bit by printing more information:

minlogsize logres 547200 logcount 8

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
---

diff --git a/db/logformat.c b/db/logformat.c
index 38b0af112..5edaa5494 100644
--- a/db/logformat.c
+++ b/db/logformat.c
@@ -160,8 +160,10 @@ logres_f(
 	end_res = (struct xfs_trans_res *)(M_RES(mp) + 1);
 	for (i = 0; res < end_res; i++, res++)
 		print_logres(i, res);
+
 	libxfs_log_get_max_trans_res(mp, &resv);
-	print_logres(-1, &resv);
+	dbprintf(_("minlogsize logres %u logcount %d\n"),
+			resv.tr_logres, resv.tr_logcount);
 
 	return 0;
 }