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 | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/fs/namespace.c b/fs/namespace.c index ab4174a3c802..ffab0bb1e649 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1716,8 +1716,16 @@ static inline bool may_mount(void) }
#ifdef CONFIG_MANDATORY_FILE_LOCKING +static bool warned_mand; static inline bool may_mandlock(void) { + if (!warned_mand) { + warned_mand = true; + pr_warn("======================================================\n"); + pr_warn("WARNING: the mand mount option is being deprecated and\n"); + pr_warn(" will be removed in v5.15!\n"); + pr_warn("======================================================\n"); + } return capable(CAP_SYS_ADMIN); } #else