1 files changed, 84 insertions, 0 deletions
diff --git a/tests/cp/fiemap-extents.sh b/tests/cp/fiemap-extents.sh
new file mode 100755
index 0000000..672070e
--- /dev/null
+++ b/tests/cp/fiemap-extents.sh
@@ -0,0 +1,84 @@
+#!/bin/sh
+# Test cp handles extents correctly
+
+# Copyright (C) 2011-2016 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cp
+
+require_sparse_support_
+
+touch fiemap_chk || framework_failure_
+fiemap_capable_ fiemap_chk ||
+  skip_ 'this file system lacks FIEMAP support'
+rm fiemap_chk
+
+fallocate --help >/dev/null || skip_ 'The fallocate utility is required'
+touch falloc.test || framework_failure_
+fallocate -l 1 -o 1 -n falloc.test ||
+  skip_ 'this file system lacks FALLOCATE support'
+rm falloc.test
+
+# We don't currently handle unwritten extents specially
+if false; then
+# Require more space than we'll actually use, so that
+# tests run in parallel do not run out of space.
+# Otherwise, with inadequate space, simply running the following
+# fallocate command would induce a temporary disk-full condition,
+# which would cause failure of unrelated tests run in parallel.
+require_file_system_bytes_free_ 800000000
+
+fallocate -l 1MiB num.test ||
+  skip_ "this fallocate doesn't support numbers with IEX suffixes"
+
+fallocate -l 600MiB space.test ||
+  skip_ 'this test needs at least 600MiB free space'
+
+# Disable this test on old BTRFS (e.g. Fedora 14)
+# which reports ordinary extents for unwritten ones.
+filefrag space.test || skip_ 'the 'filefrag' utility is missing'
+filefrag -v space.test | grep -F 'unwritten' > /dev/null ||
+  skip_ 'this file system does not report empty extents as "unwritten"'
+
+rm space.test
+
+# Ensure we read a large empty file quickly
+fallocate -l 300MiB empty.big || framework_failure_
+timeout 3 cp --sparse=always empty.big cp.test || fail=1
+test $(stat -c %s empty.big) = $(stat -c %s cp.test) || fail=1
+rm empty.big cp.test
+fi
+
+# Ensure we handle extents beyond file size correctly.
+# Note until we support fallocate, we will not maintain
+# the file allocation.  FIXME: amend this test if fallocate is supported.
+# Note currently this only uses fiemap logic when the allocation (-l)
+# is smaller than the size, thus identifying the file as sparse.
+# Note the '-l 1' case is an effective noop, and just checks
+# a file with a trailing hole is copied correctly.
+for sparse_mode in always auto never; do
+  for alloc in '-l 4194304' '-l 1048576 -o 4194304' '-l 1'; do
+    dd count=10 if=/dev/urandom iflag=fullblock of=unwritten.withdata
+    truncate -s 2MiB unwritten.withdata || framework_failure_
+    fallocate $alloc -n unwritten.withdata || framework_failure_
+    cp --sparse=$sparse_mode unwritten.withdata cp.test || fail=1
+    test $(stat -c %s unwritten.withdata) = $(stat -c %s cp.test) || fail=1
+    cmp unwritten.withdata cp.test || fail=1
+    rm unwritten.withdata cp.test || framework_failure_
+  done
+done
+
+Exit $fail