[PATCH] xfs/801: provide missing sysfs-dump function

["Darrick J. Wong" <djwong@kernel.org>]

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

This test uses sysfs-dump to capture THP diagnostic information to
$seqres.full.  Unfortunately, that's not a standard program (it's one of
my many tools) and I forgot to paste the script into the test.  Hence
it's been broken since merge for everyone else.  Fix it.

Cc: <fstests@vger.kernel.org> # v2024.08.11
Fixes: 518896a7b483c0 ("xfs: test online repair when xfiles consists of THPs")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
---
 tests/xfs/801 |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tests/xfs/801 b/tests/xfs/801
index 1190cfab8a9f94..a05a6efc1a9058 100755
--- a/tests/xfs/801
+++ b/tests/xfs/801
@@ -42,6 +42,18 @@ test -w "$knob" || _notrun "tmpfs transparent hugepages disabled"
 pagesize=`getconf PAGE_SIZE`
 pagesize_kb=$((pagesize / 1024))
 
+sysfs-dump() {
+	for i in "$@"; do
+		if [ -d "$i" ]; then
+			for x in "$i/"*; do
+				test -f "$x" && echo "$x: $(cat "$x")"
+			done
+		else
+			test -f "$i" && echo "$i: $(cat "$i")"
+		fi
+	done
+}
+
 echo "settings now: pagesize=${pagesize_kb}KB" >> $seqres.full
 sysfs-dump /sys/kernel/mm/transparent_hugepage/* >> $seqres.full