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-rwxr-xr-xtests/cp/sparse.sh33
1 files changed, 33 insertions, 0 deletions
diff --git a/tests/cp/sparse.sh b/tests/cp/sparse.sh
index d6cc4c4b1..3e4a67caf 100755
--- a/tests/cp/sparse.sh
+++ b/tests/cp/sparse.sh
@@ -37,4 +37,37 @@ test $(stat --printf %b copy) -le $(stat --printf %b sparse) || fail=1
cp --sparse=always --reflink sparse copy && fail=1
cp --sparse=never --reflink sparse copy && fail=1
+
+# Ensure we handle sparse/non-sparse transitions correctly
+maxn=128 # how many $hole_size chunks per file
+hole_size=$(stat -c %o copy)
+dd if=/dev/zero bs=$hole_size count=$maxn of=zeros || framework_failure_
+tr '\0' 'U' < zeros > nonzero || framework_failure_
+
+for pattern in 1 0; do
+ test "$pattern" = 1 && pattern="$(printf '%s\n%s' nonzero zeros)"
+ test "$pattern" = 0 && pattern="$(printf '%s\n%s' zeros nonzero)"
+
+ for n in 1 2 4 11 32 $maxn; do
+ parts=$(expr $maxn / $n)
+
+ rm -f sparse.in
+
+ # Generate non sparse file for copying with alternating
+ # hole/data patterns of size n * $hole_size
+ for i in $(yes "$pattern" | head -n$parts); do
+ dd iflag=fullblock if=$i of=sparse.in conv=notrunc oflag=append \
+ bs=$hole_size count=$n status=none || framework_failure_
+ done
+
+ cp --sparse=always sparse.in sparse.out || fail=1 # non sparse input
+ cp --sparse=always sparse.out sparse.out2 || fail=1 # sparse input
+
+ cmp sparse.in sparse.out || fail=1
+ cmp sparse.in sparse.out2 || fail=1
+
+ ls -lsh sparse.*
+ done
+done
+
Exit $fail