linux-kernel - Re: [f2fs-dev] [PATCH 2/2] f2fs: use generic terms used for encrypted block management

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Date:   Wed, 6 Sep 2017 11:18:23 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-fsdevel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: use generic terms used for encrypted
 block management

On 2017/9/6 8:15, Jaegeuk Kim wrote:
> This patch renames functions regarding to buffer management via META_MAPPING
> used for encrypted blocks especially. We can actually use them in generic way.

Meta inode cache is more like bd_inode cache now. ;)

Reviewed-by: Chao Yu <yuchao0@...wei.com>

Thanks,

> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/data.c    |  6 +++---
>  fs/f2fs/f2fs.h    |  3 +--
>  fs/f2fs/file.c    |  2 +-
>  fs/f2fs/gc.c      | 13 +++++++++----
>  fs/f2fs/segment.c |  3 +--
>  5 files changed, 15 insertions(+), 12 deletions(-)
> 
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index e6c683e7a10e..ee6801fdbdec 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -1163,7 +1163,7 @@ static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr,
>  			return ERR_CAST(ctx);
>  
>  		/* wait the page to be moved by cleaning */
> -		f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
> +		f2fs_wait_on_block_writeback(sbi, blkaddr);
>  	}
>  
>  	bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES));
> @@ -1349,7 +1349,7 @@ static int encrypt_one_page(struct f2fs_io_info *fio)
>  		return 0;
>  
>  	/* wait for GCed encrypted page writeback */
> -	f2fs_wait_on_encrypted_page_writeback(fio->sbi, fio->old_blkaddr);
> +	f2fs_wait_on_block_writeback(fio->sbi, fio->old_blkaddr);
>  
>  retry_encrypt:
>  	fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
> @@ -1975,7 +1975,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
>  
>  	/* wait for GCed encrypted page writeback */
>  	if (f2fs_encrypted_file(inode))
> -		f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
> +		f2fs_wait_on_block_writeback(sbi, blkaddr);
>  
>  	if (len == PAGE_SIZE || PageUptodate(page))
>  		return 0;
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 417c28f01fd5..91fb749686f2 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -2550,8 +2550,7 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
>  			struct f2fs_io_info *fio, bool add_list);
>  void f2fs_wait_on_page_writeback(struct page *page,
>  			enum page_type type, bool ordered);
> -void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
> -			block_t blkaddr);
> +void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr);
>  void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
>  void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
>  int lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index f8cedaba7ce4..224379a9848c 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -107,7 +107,7 @@ static int f2fs_vm_page_mkwrite(struct vm_fault *vmf)
>  
>  	/* wait for GCed encrypted page writeback */
>  	if (f2fs_encrypted_file(inode))
> -		f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
> +		f2fs_wait_on_block_writeback(sbi, dn.data_blkaddr);
>  
>  out_sem:
>  	up_read(&F2FS_I(inode)->i_mmap_sem);
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index 6a12f33d0cdd..bfe6a8ccc3a0 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -599,8 +599,12 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
>  	return true;
>  }
>  
> -static void move_encrypted_block(struct inode *inode, block_t bidx,
> -							unsigned int segno, int off)
> +/*
> + * Move data block via META_MAPPING while keeping locked data page.
> + * This can be used to move blocks, aka LBAs, directly on disk.
> + */
> +static void move_data_block(struct inode *inode, block_t bidx,
> +					unsigned int segno, int off)
>  {
>  	struct f2fs_io_info fio = {
>  		.sbi = F2FS_I_SB(inode),
> @@ -873,9 +877,10 @@ static void gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
>  			start_bidx = start_bidx_of_node(nofs, inode)
>  								+ ofs_in_node;
>  			if (f2fs_encrypted_file(inode))
> -				move_encrypted_block(inode, start_bidx, segno, off);
> +				move_data_block(inode, start_bidx, segno, off);
>  			else
> -				move_data_page(inode, start_bidx, gc_type, segno, off);
> +				move_data_page(inode, start_bidx, gc_type,
> +								segno, off);
>  
>  			if (locked) {
>  				up_write(&fi->dio_rwsem[WRITE]);
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 265c3bc44f2d..9e708e525ba8 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2528,8 +2528,7 @@ void f2fs_wait_on_page_writeback(struct page *page,
>  	}
>  }
>  
> -void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
> -							block_t blkaddr)
> +void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr)
>  {
>  	struct page *cpage;
>  
>