linux-kernel - Re: [PATCH v4 02/10] tracefs: Rename some tracefs function

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Date:   Fri, 14 Jul 2023 11:11:13 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Ajay Kaher <akaher@...are.com>
Cc:     shuah@...nel.org, mhiramat@...nel.org, chinglinyu@...gle.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, lkp@...el.com,
        namit@...are.com, oe-lkp@...ts.linux.dev, amakhalov@...are.com,
        er.ajay.kaher@...il.com, srivatsa@...il.mit.edu, tkundu@...are.com,
        vsirnapalli@...are.com
Subject: Re: [PATCH v4 02/10] tracefs: Rename some tracefs function


Some nits.

First, the subject should be:

 tracefs: Rename and export some tracefs functions

Yes, we should export them here too, even though they are not used yet.

On Thu, 13 Jul 2023 17:03:16 +0530
Ajay Kaher <akaher@...are.com> wrote:

> Renaming following functions as these would require by eventfs
> as well:

I would have this state:

Export a few tracefs functions that will be needed by the eventfs dynamic
file system. Rename them to start with "tracefs_" to keep with the name
space.

> 
> start_creating -> tracefs_start_creating
> failed_creating -> tracefs_failed_creating
> end_creating -> tracefs_end_creating
> 
> Signed-off-by: Ajay Kaher <akaher@...are.com>
> Co-developed-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Tested-by: Ching-lin Yu <chinglinyu@...gle.com>
> ---
>  fs/tracefs/inode.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
> index 57ac8aa4a724..b0348efc0238 100644
> --- a/fs/tracefs/inode.c
> +++ b/fs/tracefs/inode.c
> @@ -399,7 +399,7 @@ static struct file_system_type trace_fs_type = {
>  };
>  MODULE_ALIAS_FS("tracefs");
>  
> -static struct dentry *start_creating(const char *name, struct dentry *parent)
> +static struct dentry *tracefs_start_creating(const char *name, struct dentry *parent)

Remove the static, and create the fs/tracefs/internal.h file in this patch.

-- Steve


>  {
>  	struct dentry *dentry;
>  	int error;
> @@ -437,7 +437,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
>  	return dentry;
>  }
>  
> -static struct dentry *failed_creating(struct dentry *dentry)
> +static struct dentry *tracefs_failed_creating(struct dentry *dentry)
>  {
>  	inode_unlock(d_inode(dentry->d_parent));
>  	dput(dentry);
> @@ -445,7 +445,7 @@ static struct dentry *failed_creating(struct dentry *dentry)
>  	return NULL;
>  }
>  
> -static struct dentry *end_creating(struct dentry *dentry)
> +static struct dentry *tracefs_end_creating(struct dentry *dentry)
>  {
>  	inode_unlock(d_inode(dentry->d_parent));
>  	return dentry;
> @@ -490,14 +490,14 @@ struct dentry *tracefs_create_file(const char *name, umode_t mode,
>  	if (!(mode & S_IFMT))
>  		mode |= S_IFREG;
>  	BUG_ON(!S_ISREG(mode));
> -	dentry = start_creating(name, parent);
> +	dentry = tracefs_start_creating(name, parent);
>  
>  	if (IS_ERR(dentry))
>  		return NULL;
>  
>  	inode = tracefs_get_inode(dentry->d_sb);
>  	if (unlikely(!inode))
> -		return failed_creating(dentry);
> +		return tracefs_failed_creating(dentry);
>  
>  	inode->i_mode = mode;
>  	inode->i_fop = fops ? fops : &tracefs_file_operations;
> @@ -506,13 +506,13 @@ struct dentry *tracefs_create_file(const char *name, umode_t mode,
>  	inode->i_gid = d_inode(dentry->d_parent)->i_gid;
>  	d_instantiate(dentry, inode);
>  	fsnotify_create(d_inode(dentry->d_parent), dentry);
> -	return end_creating(dentry);
> +	return tracefs_end_creating(dentry);
>  }
>  
>  static struct dentry *__create_dir(const char *name, struct dentry *parent,
>  				   const struct inode_operations *ops)
>  {
> -	struct dentry *dentry = start_creating(name, parent);
> +	struct dentry *dentry = tracefs_start_creating(name, parent);
>  	struct inode *inode;
>  
>  	if (IS_ERR(dentry))
> @@ -520,7 +520,7 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent,
>  
>  	inode = tracefs_get_inode(dentry->d_sb);
>  	if (unlikely(!inode))
> -		return failed_creating(dentry);
> +		return tracefs_failed_creating(dentry);
>  
>  	/* Do not set bits for OTH */
>  	inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP;
> @@ -534,7 +534,7 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent,
>  	d_instantiate(dentry, inode);
>  	inc_nlink(d_inode(dentry->d_parent));
>  	fsnotify_mkdir(d_inode(dentry->d_parent), dentry);
> -	return end_creating(dentry);
> +	return tracefs_end_creating(dentry);
>  }
>  
>  /**