linux-kernel - RE: [PATCH 11/16 v2] f2fs: add inode operations for special inodes

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Date:	Tue, 23 Oct 2012 16:46:25 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	'Marco Stornelli' <marco.stornelli@...il.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	gregkh@...uxfoundation.org, viro@...iv.linux.org.uk, arnd@...db.de,
	tytso@....edu, chur.lee@...sung.com, cm224.lee@...sung.com,
	jooyoung.hwang@...sung.com
Subject: RE: [PATCH 11/16 v2] f2fs: add inode operations for special inodes


> -----Original Message-----
> From: Marco Stornelli [mailto:marco.stornelli@...il.com]
> Sent: Tuesday, October 23, 2012 4:02 PM
> To: Jaegeuk Kim
> Cc: linux-fsdevel@...r.kernel.org; linux-kernel@...r.kernel.org; gregkh@...uxfoundation.org;
> viro@...iv.linux.org.uk; arnd@...db.de; tytso@....edu; chur.lee@...sung.com; cm224.lee@...sung.com;
> jooyoung.hwang@...sung.com
> Subject: Re: [PATCH 11/16 v2] f2fs: add inode operations for special inodes
> Importance: High
> 
> 2012/10/23 Jaegeuk Kim <jaegeuk.kim@...sung.com>:
> > This adds inode operations for directory, symlink, and special inodes.
> >
> > Signed-off-by: Changman Lee <cm224.lee@...sung.com>
> > Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
> > ---
> >  fs/f2fs/namei.c |  494 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 494 insertions(+)
> >  create mode 100644 fs/f2fs/namei.c
> >
> > diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> > new file mode 100644
> > index 0000000..899d144
> > --- /dev/null
> > +++ b/fs/f2fs/namei.c
> > @@ -0,0 +1,494 @@
> > +/**
> > + * fs/f2fs/namei.c
> > + *
> > + * Copyright (c) 2012 Samsung Electronics Co., Ltd.
> > + *             http://www.samsung.com/
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +#include <linux/fs.h>
> > +#include <linux/f2fs_fs.h>
> > +#include <linux/pagemap.h>
> > +#include <linux/sched.h>
> > +#include <linux/ctype.h>
> > +
> > +#include "f2fs.h"
> > +#include "xattr.h"
> > +#include "acl.h"
> > +
> > +static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
> > +{
> > +       struct super_block *sb = dir->i_sb;
> > +       struct f2fs_sb_info *sbi = F2FS_SB(sb);
> > +       nid_t ino;
> > +       struct inode *inode;
> > +       bool nid_free = false;
> > +       int err;
> > +
> > +       inode = new_inode(sb);
> > +       if (!inode)
> > +               return ERR_PTR(-ENOMEM);
> > +
> > +       mutex_lock_op(sbi, NODE_NEW);
> > +       if (!alloc_nid(sbi, &ino)) {
> > +               mutex_unlock_op(sbi, NODE_NEW);
> > +               err = -ENOSPC;
> > +               goto fail;
> > +       }
> > +       mutex_unlock_op(sbi, NODE_NEW);
> > +
> > +       inode->i_uid = current_fsuid();
> > +
> > +       if (dir->i_mode & S_ISGID) {
> > +               inode->i_gid = dir->i_gid;
> > +               if (S_ISDIR(mode))
> > +                       mode |= S_ISGID;
> > +       } else {
> > +               inode->i_gid = current_fsgid();
> > +       }
> > +
> > +       inode->i_ino = ino;
> > +       inode->i_mode = mode;
> > +       inode->i_blocks = 0;
> > +       inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
> > +
> > +       err = insert_inode_locked(inode);
> > +       if (err) {
> > +               err = -EINVAL;
> > +               nid_free = true;
> > +               goto out;
> > +       }
> > +
> > +       mark_inode_dirty(inode);
> > +       return inode;
> > +
> > +out:
> > +       clear_nlink(inode);
> > +       unlock_new_inode(inode);
> > +fail:
> > +       iput(inode);
> 
> make_bad_inode here?

I wanted to call f2fs_evict_inode() at this moment.
- f2fs_evict_inode()
 - remove_inode_page()
   -> check any erroneous conditions.

Got coffee? :)

> 
> Marco


---
Jaegeuk Kim
Samsung


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