From 52e024b7b78572091aee98b37958ceffc6432dca Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 16 May 2024 23:30:33 -0700
Subject: [PATCH] dd: skip some alloc tests on ZFS

* tests/dd/sparse.sh: Skip some tests on ZFS.
---
 tests/dd/sparse.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/dd/sparse.sh b/tests/dd/sparse.sh
index 5194606aa1..1ac1920fff 100755
--- a/tests/dd/sparse.sh
+++ b/tests/dd/sparse.sh
@@ -58,7 +58,10 @@ kb_alloc() { du -k "$1"|cut -f1; }
 # skip the remaining tests.  On at least Solaris 10 with NFS,
 # file.in is reported to occupy <= 1KiB for about 50 seconds
 # after its creation.
-if test $(kb_alloc file.in) -gt 3000; then
+# Also, ZFS allocation reports can be delayed or off (problem
+# observed on Ubuntu 23.10), so don’t trust this test on ZFS.
+if test $(kb_alloc file.in) -gt 3000 && test "$(stat -f -c %T file.in)" != zfs
+then
 
   # Ensure NUL blocks smaller than the *output* block size are not made sparse.
   # Here, with a 2MiB block size, dd's conv=sparse must *not* introduce a hole.
-- 
2.47.2