linux-kernel - [PATCH v12 7/7] proc: use named enums for better readability

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Message-Id: <20200419141057.621356-8-gladkov.alexey@gmail.com>
Date:   Sun, 19 Apr 2020 16:10:57 +0200
From:   Alexey Gladkov <gladkov.alexey@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        Linux API <linux-api@...r.kernel.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Linux Security Module <linux-security-module@...r.kernel.org>,
        Akinobu Mita <akinobu.mita@...il.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Alexey Gladkov <legion@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Daniel Micay <danielmicay@...il.com>,
        Djalal Harouni <tixxdz@...il.com>,
        "Dmitry V . Levin" <ldv@...linux.org>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        "J . Bruce Fields" <bfields@...ldses.org>,
        Jeff Layton <jlayton@...chiereds.net>,
        Jonathan Corbet <corbet@....net>,
        Kees Cook <keescook@...omium.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        David Howells <dhowells@...hat.com>
Subject: [PATCH v12 7/7] proc: use named enums for better readability

Signed-off-by: Alexey Gladkov <gladkov.alexey@...il.com>
Reviewed-by: Alexey Dobriyan <adobriyan@...il.com>
Reviewed-by: Kees Cook <keescook@...omium.org>
---
 fs/proc/base.c          | 2 +-
 fs/proc/inode.c         | 2 +-
 fs/proc/root.c          | 4 ++--
 include/linux/proc_fs.h | 8 ++++----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index a52a91e90c25..2868bff1a142 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -699,7 +699,7 @@ int proc_setattr(struct dentry *dentry, struct iattr *attr)
  */
 static bool has_pid_permissions(struct proc_fs_info *fs_info,
 				 struct task_struct *task,
-				 int hide_pid_min)
+				 enum proc_hidepid hide_pid_min)
 {
 	/*
 	 * If 'hidpid' mount option is set force a ptrace check,
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index cbacac2e892b..f40c2532c057 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -166,7 +166,7 @@ void proc_invalidate_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock
 		deactivate_super(old_sb);
 }
 
-static inline const char *hidepid2str(int v)
+static inline const char *hidepid2str(enum proc_hidepid v)
 {
 	switch (v) {
 		case HIDEPID_OFF: return "off";
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 288093261b7f..ffebed1999e5 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -32,9 +32,9 @@
 struct proc_fs_context {
 	struct pid_namespace	*pid_ns;
 	unsigned int		mask;
-	int			hidepid;
+	enum proc_hidepid	hidepid;
 	int			gid;
-	int			pidonly;
+	enum proc_pidonly	pidonly;
 };
 
 enum proc_param {
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 8bc31ba5cd9c..2cb424e6f36a 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -43,7 +43,7 @@ struct proc_ops {
 } __randomize_layout;
 
 /* definitions for hide_pid field */
-enum {
+enum proc_hidepid {
 	HIDEPID_OFF	  = 0,
 	HIDEPID_NO_ACCESS = 1,
 	HIDEPID_INVISIBLE = 2,
@@ -51,7 +51,7 @@ enum {
 };
 
 /* definitions for proc mount option pidonly */
-enum {
+enum proc_pidonly {
 	PROC_PIDONLY_OFF = 0,
 	PROC_PIDONLY_ON  = 1,
 };
@@ -61,8 +61,8 @@ struct proc_fs_info {
 	struct dentry *proc_self;        /* For /proc/self */
 	struct dentry *proc_thread_self; /* For /proc/thread-self */
 	kgid_t pid_gid;
-	int hide_pid;
-	int pidonly;
+	enum proc_hidepid hide_pid;
+	enum proc_pidonly pidonly;
 };
 
 static inline struct proc_fs_info *proc_sb_info(struct super_block *sb)
-- 
2.25.3