diff mbox series

[v3,1/2] fs: warn about impending deprecation of mandatory locks

Message ID 20210820163919.435135-2-jlayton@kernel.org (mailing list archive)
State New, archived
Headers show
Series fs: remove support for mandatory locking | expand

Commit Message

Jeff Layton Aug. 20, 2021, 4:39 p.m. UTC
We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros
have disabled it. Warn the stragglers that still use "-o mand" that
we'll be dropping support for that mount option.

Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
 fs/namespace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/fs/namespace.c b/fs/namespace.c
index ab4174a3c802..2279473d0d6f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1716,8 +1716,12 @@  static inline bool may_mount(void)
-static inline bool may_mandlock(void)
+static bool may_mandlock(void)
+	pr_warn_once("======================================================\n"
+		     "WARNING: the mand mount option is being deprecated and\n"
+		     "         will be removed in v5.15!\n"
+		     "======================================================\n");
 	return capable(CAP_SYS_ADMIN);