[PATCH 2/9] generic/294, afs: Allow for mknod subtest failing if mknod not supported

[David Howells]

If mknod is not supported, some of generic/294 will fail due to that rather
than what's actually being tested - but the other subtests will still work
as before.

Add a "_has_mknod" function that can be used to find out if the mknod tests
should be skipped.  This is then used to allow the rest of generic/294 to
be employed on AFS.

Signed-off-by: David Howells <dhowells at redhat.com>
cc: linux-afs at lists.infradead.org
---

 common/rc                     |   10 ++++++++++
 doc/requirement-checking.txt  |    9 +++++++++
 tests/generic/294             |    8 ++++++++
 tests/generic/294.cfg         |    1 +
 tests/generic/294.out         |    5 -----
 tests/generic/294.out.mknod   |    6 ++++++
 tests/generic/294.out.nomknod |    7 +++++++
 7 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 tests/generic/294.cfg
 delete mode 100644 tests/generic/294.out
 create mode 100644 tests/generic/294.out.mknod
 create mode 100644 tests/generic/294.out.nomknod

diff --git a/common/rc b/common/rc
index f24d0e87..4ffec9a2 100644
--- a/common/rc
+++ b/common/rc
@@ -4603,6 +4603,16 @@ _getcap()
 	return ${PIPESTATUS[0]}
 }
 
+_has_mknod()
+{
+	case $FSTYP in
+	afs)
+		return 1;;
+	*)
+		return 0;;
+	esac
+}
+
 init_rc
 
 ################################################################################
diff --git a/doc/requirement-checking.txt b/doc/requirement-checking.txt
index 45d2756b..d31ba3fb 100644
--- a/doc/requirement-checking.txt
+++ b/doc/requirement-checking.txt
@@ -16,6 +16,8 @@ they have.  This is done with _require_<xxx> macros, which may take parameters.
 
 	_require_chattr <letters>
 	_require_exportfs
+	_require_mknod
+	_has_mknod
 
  (3) System call requirements.
 
@@ -97,6 +99,13 @@ _require_exportfs
      The test also requires the use of the open_by_handle_at() system call and
      will be skipped if it isn't available in the kernel.
 
+_require_mknod
+_has_mknod
+
+     The test requires that the $TEST_DEV filesystem supports mknod(2).
+     _require_mknod will cause the test to be skipped; _has_mknod returns 0 if
+     mknod is supported and 1 otherwise.
+
 
 ========================
 SYSTEM CALL REQUIREMENTS
diff --git a/tests/generic/294 b/tests/generic/294
index 55b24e12..4fc05082 100755
--- a/tests/generic/294
+++ b/tests/generic/294
@@ -8,6 +8,7 @@
 # we ask to create an already-existing entity on an RO filesystem
 #
 seq=`basename $0`
+seqfull=$0
 seqres=$RESULT_DIR/$seq
 echo "QA output created by $seq"
 
@@ -34,6 +35,13 @@ _require_scratch
 _require_symlinks
 _require_mknod
 
+features=""
+if ! _has_mknod; then
+	echo HAS NO MKNOD $?
+	features="nomknod"
+fi
+_link_out_file "$features"
+
 rm -f $seqres.full
 _scratch_mkfs > $seqres.full 2>&1 || _fail "Could not mkfs scratch device"
 
diff --git a/tests/generic/294.cfg b/tests/generic/294.cfg
new file mode 100644
index 00000000..c0466cde
--- /dev/null
+++ b/tests/generic/294.cfg
@@ -0,0 +1 @@
+nomknod: nomknod
diff --git a/tests/generic/294.out b/tests/generic/294.out
deleted file mode 100644
index 78024728..00000000
--- a/tests/generic/294.out
+++ /dev/null
@@ -1,5 +0,0 @@
-QA output created by 294
-mknod: SCRATCH_MNT/294.test/testnode: File exists
-mkdir: cannot create directory 'SCRATCH_MNT/294.test/testdir': File exists
-touch: cannot touch 'SCRATCH_MNT/294.test/testtarget': Read-only file system
-ln: creating symbolic link 'SCRATCH_MNT/294.test/testlink': File exists
diff --git a/tests/generic/294.out.mknod b/tests/generic/294.out.mknod
new file mode 100644
index 00000000..4aea9d82
--- /dev/null
+++ b/tests/generic/294.out.mknod
@@ -0,0 +1,6 @@
+QA output created by 294
+mknod: SCRATCH_MNT/294.test/testnode: Operation not permitted
+mknod: SCRATCH_MNT/294.test/testnode: Read-only file system
+mkdir: cannot create directory 'SCRATCH_MNT/294.test/testdir': File exists
+touch: cannot touch 'SCRATCH_MNT/294.test/testtarget': Read-only file system
+ln: creating symbolic link 'SCRATCH_MNT/294.test/testlink': File exists
diff --git a/tests/generic/294.out.nomknod b/tests/generic/294.out.nomknod
new file mode 100644
index 00000000..43658aa8
--- /dev/null
+++ b/tests/generic/294.out.nomknod
@@ -0,0 +1,7 @@
+QA output created by 294
+HAS NO MKNOD
+mknod: SCRATCH_MNT/294.test/testnode: Operation not permitted
+mknod: SCRATCH_MNT/294.test/testnode: Read-only file system
+mkdir: cannot create directory 'SCRATCH_MNT/294.test/testdir': File exists
+touch: cannot touch 'SCRATCH_MNT/294.test/testtarget': Read-only file system
+ln: creating symbolic link 'SCRATCH_MNT/294.test/testlink': File exists