[PATCH v4 3/3] xfs: test quota's project ID on special files

[Andrey Albershteyn <aalbersh@redhat.com>]

From: Andrey Albershteyn <aalbersh@redhat.com>

With addition of file_getattr() and file_setattr(), xfs_quota now can
set project ID on filesystem inodes behind special files. Previously,
quota reporting didn't count inodes of special files created before
project initialization. Only new inodes had project ID set.

Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
---
 tests/xfs/2000     | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/xfs/2000.out | 15 +++++++++++
 2 files changed, 88 insertions(+)

diff --git a/tests/xfs/2000 b/tests/xfs/2000
new file mode 100755
index 000000000000..413022dd5d8a
--- /dev/null
+++ b/tests/xfs/2000
@@ -0,0 +1,73 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 Red Hat.  All Rights Reserved.
+#
+# FS QA Test No. 2000
+#
+# Test that XFS can set quota project ID on special files
+#
+. ./common/preamble
+_begin_fstest auto quota
+
+# Import common functions.
+. ./common/quota
+. ./common/filter
+
+# Modify as appropriate.
+_require_scratch
+_require_xfs_quota
+_require_test_program "af_unix"
+_require_test_program "file_attr"
+_require_symlinks
+_require_mknod
+
+_scratch_mkfs >>$seqres.full 2>&1
+_qmount_option "pquota"
+_scratch_mount
+
+create_af_unix () {
+	$here/src/af_unix $* || echo af_unix failed
+}
+
+filter_quota() {
+	_filter_quota | sed "s~$tmp.projects~PROJECTS_FILE~"
+}
+
+projectdir=$SCRATCH_MNT/prj
+id=42
+
+mkdir $projectdir
+mkfifo $projectdir/fifo
+mknod $projectdir/chardev c 1 1
+mknod $projectdir/blockdev b 1 1
+create_af_unix $projectdir/socket
+touch $projectdir/foo
+ln -s $projectdir/foo $projectdir/symlink
+touch $projectdir/bar
+ln -s $projectdir/bar $projectdir/broken-symlink
+rm -f $projectdir/bar
+
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "project -sp $projectdir $id" $SCRATCH_DEV | filter_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "limit -p isoft=20 ihard=20 $id " $SCRATCH_DEV | filter_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "project -cp $projectdir $id" $SCRATCH_DEV | filter_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "report -inN -p" $SCRATCH_DEV | _filter_project_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "project -Cp $projectdir $id" $SCRATCH_DEV | filter_quota
+
+# Let's check that we can recreate the project (flags were cleared out)
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "project -sp $projectdir $id" $SCRATCH_DEV | filter_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "limit -p isoft=20 ihard=20 $id " $SCRATCH_DEV | filter_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "report -inN -p" $SCRATCH_DEV | _filter_project_quota
+$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid -x \
+	-c "project -Cp $projectdir $id" $SCRATCH_DEV | filter_quota
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/2000.out b/tests/xfs/2000.out
new file mode 100644
index 000000000000..e53ceb959775
--- /dev/null
+++ b/tests/xfs/2000.out
@@ -0,0 +1,15 @@
+QA output created by 2000
+Setting up project 42 (path SCRATCH_MNT/prj)...
+Processed 1 (PROJECTS_FILE and cmdline) paths for project 42 with recursion depth infinite (-1).
+Checking project 42 (path SCRATCH_MNT/prj)...
+Processed 1 (PROJECTS_FILE and cmdline) paths for project 42 with recursion depth infinite (-1).
+#42 8 20 20 00 [--------]
+
+Clearing project 42 (path SCRATCH_MNT/prj)...
+Processed 1 (PROJECTS_FILE and cmdline) paths for project 42 with recursion depth infinite (-1).
+Setting up project 42 (path SCRATCH_MNT/prj)...
+Processed 1 (PROJECTS_FILE and cmdline) paths for project 42 with recursion depth infinite (-1).
+#42 8 20 20 00 [--------]
+
+Clearing project 42 (path SCRATCH_MNT/prj)...
+Processed 1 (PROJECTS_FILE and cmdline) paths for project 42 with recursion depth infinite (-1).

-- 
2.50.1