linux-kernel - Re: [PATCH v2 48/92] hfs: convert to ctime accessor functions

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Message-ID: <20230706125044.yuder555eqh3acjx@quack3>
Date:   Thu, 6 Jul 2023 14:50:44 +0200
From:   Jan Kara <jack@...e.cz>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     Christian Brauner <brauner@...nel.org>,
        Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 48/92] hfs: convert to ctime accessor functions

On Wed 05-07-23 15:01:13, Jeff Layton wrote:
> In later patches, we're going to change how the inode's ctime field is
> used. Switch to using accessor functions instead of raw accesses of
> inode->i_ctime.
> 
> Signed-off-by: Jeff Layton <jlayton@...nel.org>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/hfs/catalog.c |  8 ++++----
>  fs/hfs/dir.c     |  2 +-
>  fs/hfs/inode.c   | 13 ++++++-------
>  fs/hfs/sysdep.c  |  4 +++-
>  4 files changed, 14 insertions(+), 13 deletions(-)
> 
> diff --git a/fs/hfs/catalog.c b/fs/hfs/catalog.c
> index d365bf0b8c77..632c226a3972 100644
> --- a/fs/hfs/catalog.c
> +++ b/fs/hfs/catalog.c
> @@ -133,7 +133,7 @@ int hfs_cat_create(u32 cnid, struct inode *dir, const struct qstr *str, struct i
>  		goto err1;
>  
>  	dir->i_size++;
> -	dir->i_mtime = dir->i_ctime = current_time(dir);
> +	dir->i_mtime = inode_set_ctime_current(dir);
>  	mark_inode_dirty(dir);
>  	hfs_find_exit(&fd);
>  	return 0;
> @@ -269,7 +269,7 @@ int hfs_cat_delete(u32 cnid, struct inode *dir, const struct qstr *str)
>  	}
>  
>  	dir->i_size--;
> -	dir->i_mtime = dir->i_ctime = current_time(dir);
> +	dir->i_mtime = inode_set_ctime_current(dir);
>  	mark_inode_dirty(dir);
>  	res = 0;
>  out:
> @@ -337,7 +337,7 @@ int hfs_cat_move(u32 cnid, struct inode *src_dir, const struct qstr *src_name,
>  	if (err)
>  		goto out;
>  	dst_dir->i_size++;
> -	dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir);
> +	dst_dir->i_mtime = inode_set_ctime_current(dst_dir);
>  	mark_inode_dirty(dst_dir);
>  
>  	/* finally remove the old entry */
> @@ -349,7 +349,7 @@ int hfs_cat_move(u32 cnid, struct inode *src_dir, const struct qstr *src_name,
>  	if (err)
>  		goto out;
>  	src_dir->i_size--;
> -	src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir);
> +	src_dir->i_mtime = inode_set_ctime_current(src_dir);
>  	mark_inode_dirty(src_dir);
>  
>  	type = entry.type;
> diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
> index 3e1e3dcf0b48..b75c26045df4 100644
> --- a/fs/hfs/dir.c
> +++ b/fs/hfs/dir.c
> @@ -263,7 +263,7 @@ static int hfs_remove(struct inode *dir, struct dentry *dentry)
>  	if (res)
>  		return res;
>  	clear_nlink(inode);
> -	inode->i_ctime = current_time(inode);
> +	inode_set_ctime_current(inode);
>  	hfs_delete_inode(inode);
>  	mark_inode_dirty(inode);
>  	return 0;
> diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
> index 441d7fc952e3..ee349b72cfb3 100644
> --- a/fs/hfs/inode.c
> +++ b/fs/hfs/inode.c
> @@ -200,7 +200,7 @@ struct inode *hfs_new_inode(struct inode *dir, const struct qstr *name, umode_t
>  	inode->i_uid = current_fsuid();
>  	inode->i_gid = current_fsgid();
>  	set_nlink(inode, 1);
> -	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
> +	inode->i_mtime = inode->i_atime = inode_set_ctime_current(inode);
>  	HFS_I(inode)->flags = 0;
>  	HFS_I(inode)->rsrc_inode = NULL;
>  	HFS_I(inode)->fs_blocks = 0;
> @@ -355,8 +355,8 @@ static int hfs_read_inode(struct inode *inode, void *data)
>  			inode->i_mode |= S_IWUGO;
>  		inode->i_mode &= ~hsb->s_file_umask;
>  		inode->i_mode |= S_IFREG;
> -		inode->i_ctime = inode->i_atime = inode->i_mtime =
> -				hfs_m_to_utime(rec->file.MdDat);
> +		inode->i_atime = inode->i_mtime = inode_set_ctime_to_ts(inode,
> +									hfs_m_to_utime(rec->file.MdDat));
>  		inode->i_op = &hfs_file_inode_operations;
>  		inode->i_fop = &hfs_file_operations;
>  		inode->i_mapping->a_ops = &hfs_aops;
> @@ -366,8 +366,8 @@ static int hfs_read_inode(struct inode *inode, void *data)
>  		inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
>  		HFS_I(inode)->fs_blocks = 0;
>  		inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
> -		inode->i_ctime = inode->i_atime = inode->i_mtime =
> -				hfs_m_to_utime(rec->dir.MdDat);
> +		inode->i_atime = inode->i_mtime = inode_set_ctime_to_ts(inode,
> +									hfs_m_to_utime(rec->dir.MdDat));
>  		inode->i_op = &hfs_dir_inode_operations;
>  		inode->i_fop = &hfs_dir_operations;
>  		break;
> @@ -654,8 +654,7 @@ int hfs_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
>  
>  		truncate_setsize(inode, attr->ia_size);
>  		hfs_file_truncate(inode);
> -		inode->i_atime = inode->i_mtime = inode->i_ctime =
> -						  current_time(inode);
> +		inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode);
>  	}
>  
>  	setattr_copy(&nop_mnt_idmap, inode, attr);
> diff --git a/fs/hfs/sysdep.c b/fs/hfs/sysdep.c
> index 2875961fdc10..dc27d418fbcd 100644
> --- a/fs/hfs/sysdep.c
> +++ b/fs/hfs/sysdep.c
> @@ -28,7 +28,9 @@ static int hfs_revalidate_dentry(struct dentry *dentry, unsigned int flags)
>  	/* fix up inode on a timezone change */
>  	diff = sys_tz.tz_minuteswest * 60 - HFS_I(inode)->tz_secondswest;
>  	if (diff) {
> -		inode->i_ctime.tv_sec += diff;
> +		struct timespec64 ctime = inode_get_ctime(inode);
> +
> +		inode_set_ctime(inode, ctime.tv_sec + diff, ctime.tv_nsec);
>  		inode->i_atime.tv_sec += diff;
>  		inode->i_mtime.tv_sec += diff;
>  		HFS_I(inode)->tz_secondswest += diff;
> -- 
> 2.41.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR