[PATCH 3/4] generic/{166,167,333,334,671}: actually fill the filesystem with snapshots

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

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

XFS has this behavior in its reflink implementation where it returns
ENOSPC if one of the AGs that would be involved in the sharing operation
becomes more than 90% full.  As Kent Overstreet points out, that means
the snapshot creator shuts down when the filesystem is only about a
third full.  We could exercise the system harder by not *forcing*
reflink, which will actually fill the filesystem full.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 common/reflink    |    8 ++++++++
 tests/generic/166 |    2 +-
 tests/generic/167 |    2 +-
 tests/generic/333 |    2 +-
 tests/generic/334 |    2 +-
 tests/generic/671 |    2 +-
 6 files changed, 13 insertions(+), 5 deletions(-)


diff --git a/common/reflink b/common/reflink
index 22adc4449b..8f30dc6784 100644
--- a/common/reflink
+++ b/common/reflink
@@ -226,6 +226,14 @@ _cp_reflink() {
 	cp --reflink=always -p -f "$file1" "$file2"
 }
 
+# Create file2 as a snapshot of file1 via cp and possibly reflink.
+_reflink_snapshot() {
+	file1="$1"
+	file2="$2"
+
+	cp --reflink=auto -p -f "$file1" "$file2"
+}
+
 # Reflink some file1 into file2
 _reflink() {
 	file1="$1"
diff --git a/tests/generic/166 b/tests/generic/166
index 0eb2ec9c3a..941b51b3f1 100755
--- a/tests/generic/166
+++ b/tests/generic/166
@@ -60,7 +60,7 @@ snappy() {
 			sleep 0.01
 			continue;
 		fi
-		out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
+		out="$(_reflink_snapshot $testdir/file1 $testdir/snap_$n 2>&1)"
 		res=$?
 		echo "$out" | grep -q "No space left" && break
 		test -n "$out" && echo "$out"
diff --git a/tests/generic/167 b/tests/generic/167
index ae5fa5eb1c..3670940825 100755
--- a/tests/generic/167
+++ b/tests/generic/167
@@ -50,7 +50,7 @@ _scratch_cycle_mount
 snappy() {
 	n=0
 	while [ ! -e $finished_file ]; do
-		out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
+		out="$(_reflink_snapshot $testdir/file1 $testdir/snap_$n 2>&1)"
 		res=$?
 		echo "$out" | grep -q "No space left" && break
 		test -n "$out" && echo "$out"
diff --git a/tests/generic/333 b/tests/generic/333
index bf1967ce29..19e69993a3 100755
--- a/tests/generic/333
+++ b/tests/generic/333
@@ -53,7 +53,7 @@ _scratch_cycle_mount
 snappy() {
 	n=0
 	while [ ! -e $finished_file ]; do
-		out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
+		out="$(_reflink_snapshot $testdir/file1 $testdir/snap_$n 2>&1)"
 		res=$?
 		echo $out | grep -q "No space left" && break
 		test -n "$out" && echo $out
diff --git a/tests/generic/334 b/tests/generic/334
index b9c14b87ac..1e4d37b415 100755
--- a/tests/generic/334
+++ b/tests/generic/334
@@ -52,7 +52,7 @@ _scratch_cycle_mount
 snappy() {
 	n=0
 	while [ ! -e $finished_file ]; do
-		out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
+		out="$(_reflink_snapshot $testdir/file1 $testdir/snap_$n 2>&1)"
 		res=$?
 		echo $out | grep -q "No space left" && break
 		test -n "$out" && echo $out
diff --git a/tests/generic/671 b/tests/generic/671
index b6cc0573f3..24ed24e213 100755
--- a/tests/generic/671
+++ b/tests/generic/671
@@ -41,7 +41,7 @@ _scratch_cycle_mount
 snappy() {
 	n=0
 	while [ ! -e $finished_file ]; do
-		out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
+		out="$(_reflink_snapshot $testdir/file1 $testdir/snap_$n 2>&1)"
 		res=$?
 		echo "$out" | grep -q "No space left" && break
 		test -n "$out" && echo "$out"