linux-kernel - Re: [PATCH v3 2/5] fat: allocate persistent inode numbers

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Date:	Mon, 24 Sep 2012 20:20:59 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:	akpm@...ux-foundation.org, bfields@...ldses.org,
	viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Ravishankar N <ravi.n1@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [PATCH v3 2/5] fat: allocate persistent inode numbers

2012/9/24, OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>:
> Namjae Jeon <linkinjeon@...il.com> writes:
>
>>> I see. fileid seems to be stat.ino on nfsd4. inode->i_ino is actually
>>> just a hash key of inode hash (exception is only in audit, iirc).
>>>
>>> So, what happens if we set "stat->ino = i_pos" on fat_getattr().
>>>
>>> int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
>>> kstat
>>> *stat)
>>> {
>>> 	struct inode *inode = dentry->d_inode;
>>> 	generic_fillattr(inode, stat);
>>> 	stat->blksize = MSDOS_SB(inode->i_sb)->cluster_size;
>>> 	if (opts->nfs == FAT_NFS_LIMITED) {
>>> 		/* Use i_pos for ino. This is used as fileid of nfs. */
>>> 		stat->ino = MSDOS_SB(inode->i_sb)->i_pos;
>
> 		stat->ino = fat_i_pos_read(MSDOS_SB(inode->i_sb), inode);
>
> Ouch, I forgot to use fat_i_pos_read().
>
There is some unclear thing.
When I see first mail, I think maybe you don't want to use i_pos for inode->ino.
FAT allocate inode->ino from i_unique on server side and If NFS client
use i_pos for inode->ino in fat_get_attr, inode numbers on each
client/server will still be mismatched.

Would you plz give me hint ?

Thanks OGAWA~.
>>> 	}
>>> 	return 0;
>>> }
>> Okay, Thanks for your help.
>> I will share the result after checking.
> --
> OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
>
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