Re: [PATCH v9 9/8] proc: use named enums for better readability

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On Wed, Mar 25, 2020 at 06:42:45PM +0100, Alexey Gladkov wrote:
> Signed-off-by: Alexey Gladkov <gladkov.alexey@xxxxxxxxx>

I love these kinds of cleanups. :)

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-Kees

> ---
>  fs/proc/base.c               | 2 +-
>  fs/proc/inode.c              | 2 +-
>  fs/proc/root.c               | 4 ++--
>  include/linux/proc_fs.h      | 6 +++---
>  include/uapi/linux/proc_fs.h | 2 +-
>  5 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/fs/proc/base.c b/fs/proc/base.c
> index a836979e42fe..608d60fb79fb 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 a462fd111719..7870e0be0a1f 100644
> --- a/fs/proc/inode.c
> +++ b/fs/proc/inode.c
> @@ -165,7 +165,7 @@ 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 42f3ee05c584..de7cee435621 100644
> --- a/fs/proc/root.c
> +++ b/fs/proc/root.c
> @@ -32,9 +32,9 @@
>  struct proc_fs_context {
>  	struct proc_fs_info	*fs_info;
>  	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 d259817ec913..b9f7ecd7f61f 100644
> --- a/include/linux/proc_fs.h
> +++ b/include/linux/proc_fs.h
> @@ -29,7 +29,7 @@ struct proc_ops {
>  };
>  
>  /* definitions for proc mount option pidonly */
> -enum {
> +enum proc_pidonly {
>  	PROC_PIDONLY_OFF = 0,
>  	PROC_PIDONLY_ON  = 1,
>  };
> @@ -39,8 +39,8 @@ 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)
> diff --git a/include/uapi/linux/proc_fs.h b/include/uapi/linux/proc_fs.h
> index dc6d717aa6ec..f5fe0e8dcfe4 100644
> --- a/include/uapi/linux/proc_fs.h
> +++ b/include/uapi/linux/proc_fs.h
> @@ -3,7 +3,7 @@
>  #define _UAPI_PROC_FS_H
>  
>  /* definitions for hide_pid field */
> -enum {
> +enum proc_hidepid {
>  	HIDEPID_OFF            = 0,
>  	HIDEPID_NO_ACCESS      = 1,
>  	HIDEPID_INVISIBLE      = 2,
> -- 
> 2.25.2
> 

-- 
Kees Cook



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