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Commit e4fd994f authored by Jeff Layton's avatar Jeff Layton Committed by Sasha Levin
Browse files

fs: warn about impending deprecation of mandatory locks 



[ Upstream commit fdd92b64d15bc4aec973caa25899afd782402e68 ]

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: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 41c7f46c

fs/namespace.c

+5 −1
Original line number Diff line number Diff line
@@ -1647,8 +1647,12 @@ static inline bool may_mount(void) 
}



#ifdef	CONFIG_MANDATORY_FILE_LOCKING

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);

}

#else