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Date:   Fri, 11 Nov 2022 17:27:57 -0800
From:   Jaegeuk Kim <jaegeuk@kernel.org>
To:     Sheng Yong <shengyong@oppo.com>
Cc:     chao@kernel.org, linux-f2fs-devel@lists.sourceforge.net,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] f2fs: fix to enable compress for newly created
 file if extension matches
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References: <20221111100830.953733-1-shengyong@oppo.com>
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Does thes make sense?

https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev-test&id=608460dfae20b9d23aa222f7448710a086778222
https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev-test&id=962379487b5cb9f3b85ea367b130c2c6ca584edf

Second one is needed to address build error.

On 11/11, Sheng Yong wrote:
> If compress_extension is set, and a newly created file matches the
> extension, the file could be marked as compression file. However,
> if inline_data is also enabled, there is no chance to check its
> extension since f2fs_should_compress() always returns false.
> 
> This patch moves set_compress_inode(), which do extension check, in
> f2fs_should_compress() to check extensions before setting inline
> data flag.
> 
> Fixes: 7165841d578e ("f2fs: fix to check inline_data during compressed inode conversion")
> Signed-off-by: Sheng Yong <shengyong@oppo.com>
> ---
>  fs/f2fs/namei.c | 27 +++++++++++++--------------
>  1 file changed, 13 insertions(+), 14 deletions(-)
> 
> ---
> v1->v2: add filename parameter for f2fs_new_inode, and move
>         set_compress_inode into f2fs_new_inode
> 
> diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
> index e104409c3a0e5..36e251f438568 100644
> --- a/fs/f2fs/namei.c
> +++ b/fs/f2fs/namei.c
> @@ -22,8 +22,12 @@
>  #include "acl.h"
>  #include <trace/events/f2fs.h>
>  
> +static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
> +						const unsigned char *name);
> +
>  static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns,
> -						struct inode *dir, umode_t mode)
> +						struct inode *dir, umode_t mode,
> +						const char *name)
>  {
>  	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
>  	nid_t ino;
> @@ -119,6 +123,8 @@ static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns,
>  		if ((F2FS_I(dir)->i_flags & F2FS_COMPR_FL) &&
>  					f2fs_may_compress(inode))
>  			set_compress_context(inode);
> +		if (name)
> +			set_compress_inode(sbi, inode, name);
>  	}
>  
>  	/* Should enable inline_data after compression set */
> @@ -293,8 +299,7 @@ static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
>  	unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
>  	int i, cold_count, hot_count;
>  
> -	if (!f2fs_sb_has_compression(sbi) ||
> -			F2FS_I(inode)->i_flags & F2FS_NOCOMP_FL ||
> +	if (F2FS_I(inode)->i_flags & F2FS_NOCOMP_FL ||
>  			!f2fs_may_compress(inode) ||
>  			(!ext_cnt && !noext_cnt))
>  		return;
> @@ -326,10 +331,6 @@ static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
>  	for (i = 0; i < ext_cnt; i++) {
>  		if (!is_extension_exist(name, ext[i], false))
>  			continue;
> -
> -		/* Do not use inline_data with compression */
> -		stat_dec_inline_inode(inode);
> -		clear_inode_flag(inode, FI_INLINE_DATA);
>  		set_compress_context(inode);
>  		return;
>  	}
> @@ -352,15 +353,13 @@ static int f2fs_create(struct user_namespace *mnt_userns, struct inode *dir,
>  	if (err)
>  		return err;
>  
> -	inode = f2fs_new_inode(mnt_userns, dir, mode);
> +	inode = f2fs_new_inode(mnt_userns, dir, mode, dentry->d_name.name);
>  	if (IS_ERR(inode))
>  		return PTR_ERR(inode);
>  
>  	if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
>  		set_file_temperature(sbi, inode, dentry->d_name.name);
>  
> -	set_compress_inode(sbi, inode, dentry->d_name.name);
> -
>  	inode->i_op = &f2fs_file_inode_operations;
>  	inode->i_fop = &f2fs_file_operations;
>  	inode->i_mapping->a_ops = &f2fs_dblock_aops;
> @@ -689,7 +688,7 @@ static int f2fs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
>  	if (err)
>  		return err;
>  
> -	inode = f2fs_new_inode(mnt_userns, dir, S_IFLNK | S_IRWXUGO);
> +	inode = f2fs_new_inode(mnt_userns, dir, S_IFLNK | S_IRWXUGO, NULL);
>  	if (IS_ERR(inode))
>  		return PTR_ERR(inode);
>  
> @@ -760,7 +759,7 @@ static int f2fs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
>  	if (err)
>  		return err;
>  
> -	inode = f2fs_new_inode(mnt_userns, dir, S_IFDIR | mode);
> +	inode = f2fs_new_inode(mnt_userns, dir, S_IFDIR | mode, NULL);
>  	if (IS_ERR(inode))
>  		return PTR_ERR(inode);
>  
> @@ -817,7 +816,7 @@ static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
>  	if (err)
>  		return err;
>  
> -	inode = f2fs_new_inode(mnt_userns, dir, mode);
> +	inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
>  	if (IS_ERR(inode))
>  		return PTR_ERR(inode);
>  
> @@ -856,7 +855,7 @@ static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
>  	if (err)
>  		return err;
>  
> -	inode = f2fs_new_inode(mnt_userns, dir, mode);
> +	inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
>  	if (IS_ERR(inode))
>  		return PTR_ERR(inode);
>  
> -- 
> 2.25.1