From: Darrick J. Wong <djwong@xxxxxxxxxx>
Add a regression test to make sure that unprivileged userspace linking
into a directory fails with EDQUOT when the directory quota limits have
been exceeded.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
tests/generic/832 | 67 +++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/832.out | 3 ++
2 files changed, 70 insertions(+)
create mode 100755 tests/generic/832
create mode 100644 tests/generic/832.out
diff --git a/tests/generic/832 b/tests/generic/832
new file mode 100755
index 00000000..1190b795
--- /dev/null
+++ b/tests/generic/832
@@ -0,0 +1,67 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2022 Oracle. All Rights Reserved.
+#
+# FS QA Test No. 832
+#
+# Ensure that unprivileged userspace hits EDQUOT while linking files into a
+# directory when the directory's quota limits have been exceeded.
+#
+# Regression test for commit:
+#
+# 871b9316e7a7 ("xfs: reserve quota for dir expansion when linking/unlinking files")
+#
+. ./common/preamble
+_begin_fstest auto quick quota
+
+# Import common functions.
+. ./common/filter
+. ./common/quota
+
+# real QA test starts here
+
+# Modify as appropriate.
+_supported_fs generic
+_require_quota
+_require_user
+_require_scratch
+
+_scratch_mkfs > "$seqres.full" 2>&1
+_qmount_option usrquota
+_qmount
+
+blocksize=$(_get_block_size $SCRATCH_MNT)
+scratchdir=$SCRATCH_MNT/dir
+scratchfile=$SCRATCH_MNT/file
+mkdir $scratchdir
+touch $scratchfile
+
+# Create a 2-block directory for our 1-block quota limit
+total_size=$((blocksize * 2))
+dirents=$((total_size / 255))
+
+for ((i = 0; i < dirents; i++)); do
+ name=$(printf "x%0254d" $i)
+ ln $scratchfile $scratchdir/$name
+done
+
+# Set a low quota hardlimit for an unprivileged uid and chown the files to it
+echo "set up quota" >> $seqres.full
+setquota -u $qa_user 0 "$((blocksize / 1024))" 0 0 $SCRATCH_MNT
+chown $qa_user $scratchdir $scratchfile
+repquota -upn $SCRATCH_MNT >> $seqres.full
+
+# Fail at appending the directory as qa_user to ensure quota enforcement works
+echo "fail quota" >> $seqres.full
+for ((i = 0; i < dirents; i++)); do
+ name=$(printf "y%0254d" $i)
+ su - "$qa_user" -c "ln $scratchfile $scratchdir/$name" 2>&1 | \
+ _filter_scratch | sed -e 's/y[0-9]*/yXXX/g'
+ test "${PIPESTATUS[0]}" -ne 0 && break
+done
+repquota -upn $SCRATCH_MNT >> $seqres.full
+
+# success, all done
+echo Silence is golden
+status=0
+exit
diff --git a/tests/generic/832.out b/tests/generic/832.out
new file mode 100644
index 00000000..593afe8b
--- /dev/null
+++ b/tests/generic/832.out
@@ -0,0 +1,3 @@
+QA output created by 832
+ln: failed to create hard link 'SCRATCH_MNT/dir/yXXX': Disk quota exceeded
+Silence is golden
