lkml.org 
[lkml]   [2022]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] binder: fix redefinition of seq_file attributes
On Mon, Jul 04, 2022 at 06:13:40PM +0200, Greg Kroah-Hartman wrote:
> On Fri, Jul 01, 2022 at 06:20:41PM +0000, Carlos Llamas wrote:
> > + binder_for_each_debugfs_entry(db_entry) {
> > + dentry = binderfs_create_file(binder_logs_root_dir,
> > + db_entry->name,
> > + db_entry->fops,
> > + db_entry->data);
> > + if (IS_ERR(dentry)) {
> > + ret = PTR_ERR(dentry);
> > + goto out;
> > + }
>
> I know this is a copy of what is there already, but there is never a
> need to check the result of a debugfs_create_* call. Just call it and
> move on, never "abort" based on the result of a debugfs call, that's not
> a good idea.

This is true, none of these debugfs files seem critical for mounting a
binderfs instance. I'm thinking init_binder_logs() should just return
void. I'm only a bit hesitant to completely ignore the return code as
users specifically ask for these files to be created via mount option
"stats". So probably a pr_warn is what is actually needed here.

>
> So can you change this here, or want to send a follow-on patch that
> removes these checks?

Sure, I'll send a follow-on patch. I'm currently AFK so setting ETA for
next week until I can actually test this change.

>
> > }
> >
> > proc_log_dir = binderfs_create_dir(binder_logs_root_dir, "proc");
>
> Also there's never a need to save a directory, you can always look it up
> when you want to remove it.

It seems this is a convenient way to share this path with binder which
otherwise doesn't know where binderfs was mounted. From having a quick
look it doesn't seem that we need to share all the details in struct
binderfs_info though. Maybe there is a better way to handle all this.

Christian, since this is binderfs area WDYT?

--
Carlos Llamas

\
 
 \ /
  Last update: 2022-07-07 23:24    [W:0.139 / U:0.884 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site