[LTP] [PATCH 2/6] fanotify: Provide fanotify_mark_supported_on_fs()

[Jan Kara]

Provide helper checking whether a mark is supported on a filesystem
since some marks need not be available on all filesystems (e.g. btrfs
subvolumes). Also convert REQUIRE_MARK_TYPE_SUPPORTED_BY_KERNEL() and
its only user to use this new function.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 testcases/kernel/syscalls/fanotify/fanotify.h   | 11 ++++++++---
 testcases/kernel/syscalls/fanotify/fanotify23.c |  2 +-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/testcases/kernel/syscalls/fanotify/fanotify.h b/testcases/kernel/syscalls/fanotify/fanotify.h
index ee74c2fffbd5..f28da1a5ee55 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify.h
+++ b/testcases/kernel/syscalls/fanotify/fanotify.h
@@ -226,6 +226,11 @@ static inline int fanotify_init_flags_supported_by_kernel(unsigned int flags)
 	return fanotify_init_flags_supported_on_fs(flags, NULL);
 }
 
+static inline int fanotify_mark_supported_on_fs(uint64_t flag, const char *fname)
+{
+	return fanotify_flags_supported_on_fs(FAN_CLASS_CONTENT, flag, FAN_ACCESS, fname);
+}
+
 #define TST_FANOTIFY_INIT_KNOWN_FLAGS                                      \
 	(FAN_REPORT_DFID_NAME_TARGET | FAN_REPORT_TID | FAN_REPORT_PIDFD | \
 	FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | FAN_CLASS_PRE_CONTENT)
@@ -333,9 +338,9 @@ static inline int fanotify_handle_supported_by_kernel(int flag)
 	return 0;
 }
 
-#define REQUIRE_MARK_TYPE_SUPPORTED_BY_KERNEL(mark_type) \
+#define REQUIRE_MARK_TYPE_SUPPORTED_ON_FS(mark_type, fname) \
 	fanotify_flags_err_msg(#mark_type, __FILE__, __LINE__, tst_brk_, \
-		fanotify_mark_supported_by_kernel(mark_type))
+		fanotify_mark_supported_on_fs(mark_type, fname))
 
 #define REQUIRE_HANDLE_TYPE_SUPPORTED_BY_KERNEL(handle_type) \
 	fanotify_flags_err_msg(#handle_type, __FILE__, __LINE__, tst_brk_, \
@@ -343,7 +348,7 @@ static inline int fanotify_handle_supported_by_kernel(int flag)
 
 #define REQUIRE_FANOTIFY_EVENTS_SUPPORTED_ON_FS(init_flags, mark_type, mask, fname) do { \
 	if (mark_type)							\
-		REQUIRE_MARK_TYPE_SUPPORTED_BY_KERNEL(mark_type);	\
+		REQUIRE_MARK_TYPE_SUPPORTED_ON_FS(mark_type, fname);	\
 	if (init_flags)							\
 		REQUIRE_FANOTIFY_INIT_FLAGS_SUPPORTED_ON_FS(init_flags, fname); \
 	fanotify_flags_err_msg(#mask, __FILE__, __LINE__, tst_brk_, \
diff --git a/testcases/kernel/syscalls/fanotify/fanotify23.c b/testcases/kernel/syscalls/fanotify/fanotify23.c
index fb812c51e34e..5a03503e952a 100644
--- a/testcases/kernel/syscalls/fanotify/fanotify23.c
+++ b/testcases/kernel/syscalls/fanotify/fanotify23.c
@@ -230,7 +230,7 @@ static void setup(void)
 {
 	SAFE_TOUCH(TEST_FILE, 0666, NULL);
 
-	REQUIRE_MARK_TYPE_SUPPORTED_BY_KERNEL(FAN_MARK_EVICTABLE);
+	REQUIRE_MARK_TYPE_SUPPORTED_ON_FS(FAN_MARK_EVICTABLE, ".");
 	REQUIRE_FANOTIFY_EVENTS_SUPPORTED_ON_FS(FAN_CLASS_NOTIF|FAN_REPORT_FID,
 						FAN_MARK_FILESYSTEM,
 						FAN_ATTRIB, ".");
-- 
2.35.3