+ autofs-make-dentry-info-count-consistent.patch added to mm-nonmm-unstable branch

+ autofs-make-dentry-info-count-consistent.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: autofs: make dentry info count consistent
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     autofs-make-dentry-info-count-consistent.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/autofs-make-dentry-info-count-consistent.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ian Kent <raven@themaw.net>
Subject: autofs: make dentry info count consistent
Date: Fri, 08 Jul 2022 09:43:06 +0800

If an autofs dentry is a mount root directory there's no ->mkdir() call to
set its count to one.

To make the dentry info count consistent for all autofs dentries set count
to one when the dentry info struct is allocated.

Link: https://lkml.kernel.org/r/165724458671.30914.2902424437132835325.stgit@donald.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/autofs/inode.c |    1 +
 fs/autofs/root.c  |    4 ----
 2 files changed, 1 insertion(+), 4 deletions(-)

--- a/fs/autofs/inode.c~autofs-make-dentry-info-count-consistent
+++ a/fs/autofs/inode.c
@@ -20,6 +20,7 @@ struct autofs_info *autofs_new_ino(struc
 		INIT_LIST_HEAD(&ino->expiring);
 		ino->last_used = jiffies;
 		ino->sbi = sbi;
+		ino->count = 1;
 	}
 	return ino;
 }
--- a/fs/autofs/root.c~autofs-make-dentry-info-count-consistent
+++ a/fs/autofs/root.c
@@ -582,7 +582,6 @@ static int autofs_dir_symlink(struct use
 	d_add(dentry, inode);
 
 	dget(dentry);
-	ino->count++;
 	p_ino = autofs_dentry_ino(dentry->d_parent);
 	p_ino->count++;
 
@@ -612,7 +611,6 @@ static int autofs_dir_unlink(struct inod
 	struct autofs_info *ino = autofs_dentry_ino(dentry);
 	struct autofs_info *p_ino;
 
-	ino->count--;
 	p_ino = autofs_dentry_ino(dentry->d_parent);
 	p_ino->count--;
 	dput(ino->dentry);
@@ -695,7 +693,6 @@ static int autofs_dir_rmdir(struct inode
 	if (sbi->version < 5)
 		autofs_clear_leaf_automount_flags(dentry);
 
-	ino->count--;
 	p_ino = autofs_dentry_ino(dentry->d_parent);
 	p_ino->count--;
 	dput(ino->dentry);
@@ -734,7 +731,6 @@ static int autofs_dir_mkdir(struct user_
 		autofs_set_leaf_automount_flags(dentry);
 
 	dget(dentry);
-	ino->count++;
 	p_ino = autofs_dentry_ino(dentry->d_parent);
 	p_ino->count++;
 	inc_nlink(dir);
_

Patches currently in -mm which might be from raven@themaw.net are

autofs-use-inode-permission-method-for-write-access.patch
autofs-make-dentry-info-count-consistent.patch
autofs-use-dentry-info-count-instead-of-simple_empty.patch
autofs-add-comment-about-autofs_mountpoint_changed.patch
autofs-remove-unused-ino-field-inode.patch