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authorJeff Layton <jlayton@kernel.org>2021-08-20 09:29:50 -0400
committerJeff Layton <jlayton@kernel.org>2021-08-21 07:32:45 -0400
commitfdd92b64d15bc4aec973caa25899afd782402e68 (patch)
tree6a1d9d4a2af43d99fd5c52e850719dd77fd2959c
parent3dbdb38e286903ec220aaf1fb29a8d94297da246 (diff)
fs: warn about impending deprecation of mandatory locks
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>
-rw-r--r--fs/namespace.c6
1 files changed, 5 insertions, 1 deletions
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)
}
#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