Re: [PATCH RFC v12 1/3] fs/lock: add new callback, lm_lock_conflict, to lock_manager_operations

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On 2/10/22 6:29 AM, Jeff Layton wrote:
On Thu, 2022-02-10 at 09:21 -0500, J. Bruce Fields wrote:
Jeff, this table of locking rules seems out of date since 6109c85037e5
"locks: add a dedicated spinlock to protect i_flctx lists".  Are any of
those callbacks still called with the i_lock?  Should that column be
labeled "flc_lock" instead?  Or is that even still useful information?

--b.

Yeah, that should probably be the flc_lock. I don't think we protect
anything in the file locking code with the i_lock anymore.

Will replace inode->i_lock with flc_lock in v13.

-Dai


On Wed, Feb 09, 2022 at 08:52:07PM -0800, Dai Ngo wrote:
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index d36fe79167b3..57ce0fbc8ab1 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -439,6 +439,7 @@ prototypes::
  	void (*lm_break)(struct file_lock *); /* break_lease callback */
  	int (*lm_change)(struct file_lock **, int);
  	bool (*lm_breaker_owns_lease)(struct file_lock *);
+	bool (*lm_lock_conflict)(struct file_lock *);
locking rules: @@ -450,6 +451,7 @@ lm_grant: no no no
  lm_break:		yes		no			no
  lm_change		yes		no			no
  lm_breaker_owns_lease:	no		no			no
+lm_lock_conflict:       no		no			no
  ======================	=============	=================	=========



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