Re: [PATCH v2 1/2] fs: warn about impending deprecation of mandatory locks

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On 20.08.21 15:57, Jeff Layton wrote:
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@xxxxxxxxxxxxxxx
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
  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");
+	}

Is there a reason not to use pr_warn_once() ?


--
Thanks,

David / dhildenb




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