linux-kernel - [v6.7][PATCH v2 22/23] eventfs: Remove fsnotify*() functions from lookup()

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Date: Tue, 06 Feb 2024 06:32:20 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Sasha Levin <sashal@...nel.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Christian Brauner <brauner@...nel.org>,
 Al Viro <viro@...IV.linux.org.uk>,
 Ajay Kaher <ajay.kaher@...adcom.com>,
 Al Viro <viro@...iv.linux.org.uk>
Subject: [v6.7][PATCH v2 22/23] eventfs: Remove fsnotify*() functions from lookup()

From: "Steven Rostedt (Google)" <rostedt@...dmis.org>

The dentries and inodes are created when referenced in the lookup code.
There's no reason to call fsnotify_*() functions when they are created by
a reference. It doesn't make any sense.

Link: https://lore.kernel.org/linux-trace-kernel/20240201002719.GS2087318@ZenIV/
Link: https://lore.kernel.org/linux-trace-kernel/20240201161617.166973329@goodmis.org

Cc: stable@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Christian Brauner <brauner@...nel.org>
Cc: Al Viro <viro@...IV.linux.org.uk>
Cc: Ajay Kaher <ajay.kaher@...adcom.com>
Fixes: a376007917776 ("eventfs: Implement functions to create files and dirs when accessed");
Suggested-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
(cherry picked from commit 12d823b31fadf47c8f36ecada7abac5f903cac33)
---
 fs/tracefs/event_inode.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/tracefs/event_inode.c b/fs/tracefs/event_inode.c
index ca7daee7c811..9e031e5a2713 100644
--- a/fs/tracefs/event_inode.c
+++ b/fs/tracefs/event_inode.c
@@ -366,7 +366,6 @@ static struct dentry *lookup_file(struct eventfs_inode *parent_ei,
 	dentry->d_fsdata = get_ei(parent_ei);
 
 	d_add(dentry, inode);
-	fsnotify_create(dentry->d_parent->d_inode, dentry);
 	return NULL;
 };
 
@@ -408,7 +407,6 @@ static struct dentry *lookup_dir_entry(struct dentry *dentry,
 	inc_nlink(inode);
 	d_add(dentry, inode);
 	inc_nlink(dentry->d_parent->d_inode);
-	fsnotify_mkdir(dentry->d_parent->d_inode, dentry);
 	return NULL;
 }
 
-- 
2.43.0