linux-kernel - Re: [PATCH 10/16] f2fs: add core inode operations

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Date:	Sun, 07 Oct 2012 03:06:26 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	±èÀç±Ø <jaegeuk.kim@...sung.com>,
	viro@...iv.linux.org.uk, 'Theodore Ts'o' <tytso@....edu>,
	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	chur.lee@...sung.com, cm224.lee@...sung.com,
	jooyoung.hwang@...sung.com
Subject: Re: [PATCH 10/16] f2fs: add core inode operations

2012-10-05 (ê¸ˆ), 13:28 -0700, Eric W. Biederman:
> ê¹€ìž¬ê·¹ <jaegeuk.kim@...sung.com> writes:
> 
> > This adds core functions to get, read, write, and evict an inode.
> 
> As is this code won't compile if user namespace support is enabled.
> Suggested fixes below.

Ok, I'll check this out.
Thanks,

> 
> Eric
> 
> 
> > +static int do_read_inode(struct inode *inode)
> > +{
> > +	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
> > +	struct f2fs_inode_info *fi = F2FS_I(inode);
> > +	struct page *node_page;
> > +	struct f2fs_node *rn;
> > +	struct f2fs_inode *ri;
> > +
> > +	/* Check if ino is within scope */
> > +	check_nid_range(sbi, inode->i_ino);
> > +
> > +	node_page = get_node_page(sbi, inode->i_ino);
> > +	if (IS_ERR(node_page))
> > +		return PTR_ERR(node_page);
> > +
> > +	rn = page_address(node_page);
> > +	ri = &(rn->i);
> > +
> > +	inode->i_mode = le16_to_cpu(ri->i_mode);
> > +	inode->i_uid = le32_to_cpu(ri->i_uid);
> > +	inode->i_gid = le32_to_cpu(ri->i_gid);
> 
> Could you make this:
> 	i_uid_write(inode, le32_to_cpu(ri->i_uid));
> 	i_gid_write(inode, le32_to_cpu(ri->i_gid));
> 
> > +	set_nlink(inode, le32_to_cpu(ri->i_links));
> > +	inode->i_size = le64_to_cpu(ri->i_size);
> > +	inode->i_blocks = le64_to_cpu(ri->i_blocks);
> > +
> > +	inode->i_atime.tv_sec = le32_to_cpu(ri->i_atime);
> > +	inode->i_ctime.tv_sec = le32_to_cpu(ri->i_ctime);
> > +	inode->i_mtime.tv_sec = le32_to_cpu(ri->i_mtime);
> > +	inode->i_atime.tv_nsec = 0;
> > +	inode->i_ctime.tv_nsec = 0;
> > +	inode->i_mtime.tv_nsec = 0;
> > +	fi->current_depth = le32_to_cpu(ri->current_depth);
> > +	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
> > +	fi->i_flags = le32_to_cpu(ri->i_flags);
> > +	fi->flags = 0;
> > +	fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
> > +	get_extent_info(&fi->ext, ri->i_ext);
> > +	f2fs_put_page(node_page, 1);
> > +	return 0;
> > +}
> 
> > +void update_inode(struct inode *inode, struct page *node_page)
> > +{
> > +	struct f2fs_node *rn;
> > +	struct f2fs_inode *ri;
> > +
> > +	wait_on_page_writeback(node_page);
> > +
> > +	rn = page_address(node_page);
> > +	ri = &(rn->i);
> > +
> > +	ri->i_mode = cpu_to_le16(inode->i_mode);
> > +	ri->i_uid = cpu_to_le32(inode->i_uid);
> > +	ri->i_gid = cpu_to_le32(inode->i_gid);
> And make this:
> 	i_uid_write(inode, le32_to_cpu(ri->i_uid));
> 	i_gid_write(inode, le32_to_cpu(ri->i_gid));
> 
> > +	ri->i_links = cpu_to_le32(inode->i_nlink);
> > +	ri->i_size = cpu_to_le64(i_size_read(inode));
> > +	ri->i_blocks = cpu_to_le64(inode->i_blocks);
> > +	set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
> > +
> > +	ri->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
> > +	ri->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
> > +	ri->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
> > +	ri->current_depth = cpu_to_le32(F2FS_I(inode)->current_depth);
> > +	ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
> > +	ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
> > +	set_page_dirty(node_page);
> > +}
> --
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-- 
Jaegeuk Kim
Samsung



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