From 41ca19740a0e772eff1f9ba67293649feb836662 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 17 Sep 2019 23:23:08 -0400
Subject: autofs: get rid of pointless checks around ->count handling
* IS_ROOT can't be true for unlink or rmdir victim
* any positive autofs dentry has non-NULL autofs_dentry_ino()
* autofs symlink can't have ->count other than 1
* autofs empty directory can't have ->count other than 1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/autofs/root.c | 22 ++++++++--------------
1 file changed, 8 insertions(+), 14 deletions(-)
diff --git a/fs/autofs/root.c b/fs/autofs/root.c
index 2065281ee8b1..7806b110e79d 100644
--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@@ -571,8 +571,7 @@ static int autofs_dir_symlink(struct inode *dir,
dget(dentry);
atomic_inc(&ino->count);
p_ino = autofs_dentry_ino(dentry->d_parent);
- if (p_ino && !IS_ROOT(dentry))
- atomic_inc(&p_ino->count);
+ atomic_inc(&p_ino->count);
dir->i_mtime = current_time(dir);
@@ -610,11 +609,9 @@ static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)
if (sbi->flags & AUTOFS_SBI_CATATONIC)
return -EACCES;
- if (atomic_dec_and_test(&ino->count)) {
- p_ino = autofs_dentry_ino(dentry->d_parent);
- if (p_ino && !IS_ROOT(dentry))
- atomic_dec(&p_ino->count);
- }
+ atomic_dec(&ino->count);
+ p_ino = autofs_dentry_ino(dentry->d_parent);
+ atomic_dec(&p_ino->count);
dput(ino->dentry);
d_inode(dentry)->i_size = 0;
@@ -706,11 +703,9 @@ static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
if (sbi->version < 5)
autofs_clear_leaf_automount_flags(dentry);
- if (atomic_dec_and_test(&ino->count)) {
- p_ino = autofs_dentry_ino(dentry->d_parent);
- if (p_ino && dentry->d_parent != dentry)
- atomic_dec(&p_ino->count);
- }
+ atomic_dec(&ino->count);
+ p_ino = autofs_dentry_ino(dentry->d_parent);
+ atomic_dec(&p_ino->count);
dput(ino->dentry);
d_inode(dentry)->i_size = 0;
clear_nlink(d_inode(dentry));
@@ -758,8 +753,7 @@ static int autofs_dir_mkdir(struct inode *dir,
dget(dentry);
atomic_inc(&ino->count);
p_ino = autofs_dentry_ino(dentry->d_parent);
- if (p_ino && !IS_ROOT(dentry))
- atomic_inc(&p_ino->count);
+ atomic_inc(&p_ino->count);
inc_nlink(dir);
dir->i_mtime = current_time(dir);
--
cgit v1.2.3