Re: [PATCH v2 74/92] smb: convert to ctime accessor functions

[Jeff Layton <jlayton@kernel.org>]

On Wed, 2023-07-05 at 15:01 -0400, 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.
> 
> Acked-by: Tom Talpey <tom@talpey.com>
> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
> Signed-off-by: Jeff Layton <jlayton@kernel.org>
> ---
>  fs/smb/client/file.c    |  4 ++--
>  fs/smb/client/fscache.h |  5 +++--
>  fs/smb/client/inode.c   | 14 +++++++-------
>  fs/smb/client/smb2ops.c |  3 ++-
>  fs/smb/server/smb2pdu.c |  8 ++++----
>  5 files changed, 18 insertions(+), 16 deletions(-)
> 
> diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
> index 0a5fe8d5314b..689058e1b6e6 100644
> --- a/fs/smb/client/file.c
> +++ b/fs/smb/client/file.c
> @@ -1085,7 +1085,7 @@ int cifs_close(struct inode *inode, struct file *file)
>  		    !test_bit(CIFS_INO_CLOSE_ON_LOCK, &cinode->flags) &&
>  		    dclose) {
>  			if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) {
> -				inode->i_ctime = inode->i_mtime = current_time(inode);
> +				inode->i_mtime = inode_set_ctime_current(inode);
>  			}
>  			spin_lock(&cinode->deferred_lock);
>  			cifs_add_deferred_close(cfile, dclose);
> @@ -2596,7 +2596,7 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
>  					   write_data, to - from, &offset);
>  		cifsFileInfo_put(open_file);
>  		/* Does mm or vfs already set times? */
> -		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
> +		inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode);
>  		if ((bytes_written > 0) && (offset))
>  			rc = 0;
>  		else if (bytes_written < 0)
> diff --git a/fs/smb/client/fscache.h b/fs/smb/client/fscache.h
> index 173999610997..a228964bc2ce 100644
> --- a/fs/smb/client/fscache.h
> +++ b/fs/smb/client/fscache.h
> @@ -50,12 +50,13 @@ void cifs_fscache_fill_coherency(struct inode *inode,
>  				 struct cifs_fscache_inode_coherency_data *cd)
>  {
>  	struct cifsInodeInfo *cifsi = CIFS_I(inode);
> +	struct timespec64 ctime = inode_get_ctime(inode);
>  
>  	memset(cd, 0, sizeof(*cd));
>  	cd->last_write_time_sec   = cpu_to_le64(cifsi->netfs.inode.i_mtime.tv_sec);
>  	cd->last_write_time_nsec  = cpu_to_le32(cifsi->netfs.inode.i_mtime.tv_nsec);
> -	cd->last_change_time_sec  = cpu_to_le64(cifsi->netfs.inode.i_ctime.tv_sec);
> -	cd->last_change_time_nsec = cpu_to_le32(cifsi->netfs.inode.i_ctime.tv_nsec);
> +	cd->last_change_time_sec  = cpu_to_le64(ctime.tv_sec);
> +	cd->last_change_time_nsec  = cpu_to_le64(ctime.tv_nsec);

Tom pointed out that I made a switch to cpu_to_le64 here. That will need
to be fixed before we merge this. I've fixed this in my "ctime-next"
branch for now (and will collect other fixes there).

>  }
>  
>  
> diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
> index c3eeae07e139..218f03dd3f52 100644
> --- a/fs/smb/client/inode.c
> +++ b/fs/smb/client/inode.c
> @@ -172,7 +172,7 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
>  	else
>  		inode->i_atime = fattr->cf_atime;
>  	inode->i_mtime = fattr->cf_mtime;
> -	inode->i_ctime = fattr->cf_ctime;
> +	inode_set_ctime_to_ts(inode, fattr->cf_ctime);
>  	inode->i_rdev = fattr->cf_rdev;
>  	cifs_nlink_fattr_to_inode(inode, fattr);
>  	inode->i_uid = fattr->cf_uid;
> @@ -1744,9 +1744,9 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry)
>  		cifs_inode = CIFS_I(inode);
>  		cifs_inode->time = 0;	/* will force revalidate to get info
>  					   when needed */
> -		inode->i_ctime = current_time(inode);
> +		inode_set_ctime_current(inode);
>  	}
> -	dir->i_ctime = dir->i_mtime = current_time(dir);
> +	dir->i_mtime = inode_set_ctime_current(dir);
>  	cifs_inode = CIFS_I(dir);
>  	CIFS_I(dir)->time = 0;	/* force revalidate of dir as well */
>  unlink_out:
> @@ -2060,8 +2060,8 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
>  	 */
>  	cifsInode->time = 0;
>  
> -	d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime =
> -		current_time(inode);
> +	inode_set_ctime_current(d_inode(direntry));
> +	inode->i_mtime = inode_set_ctime_current(inode);
>  
>  rmdir_exit:
>  	free_dentry_path(page);
> @@ -2267,8 +2267,8 @@ cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
>  	/* force revalidate to go get info when needed */
>  	CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
>  
> -	source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime =
> -		target_dir->i_mtime = current_time(source_dir);
> +	source_dir->i_mtime = target_dir->i_mtime = inode_set_ctime_to_ts(source_dir,
> +									  inode_set_ctime_current(target_dir));
>  
>  cifs_rename_exit:
>  	kfree(info_buf_source);
> diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
> index 87abce010974..3cc3c4a71e32 100644
> --- a/fs/smb/client/smb2ops.c
> +++ b/fs/smb/client/smb2ops.c
> @@ -1396,7 +1396,8 @@ smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
>  	if (file_inf.LastWriteTime)
>  		inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
>  	if (file_inf.ChangeTime)
> -		inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
> +		inode_set_ctime_to_ts(inode,
> +				      cifs_NTtimeToUnix(file_inf.ChangeTime));
>  	if (file_inf.LastAccessTime)
>  		inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
>  
> diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
> index cf8822103f50..f9099831c8ff 100644
> --- a/fs/smb/server/smb2pdu.c
> +++ b/fs/smb/server/smb2pdu.c
> @@ -4779,7 +4779,7 @@ static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
>  	file_info->LastAccessTime = cpu_to_le64(time);
>  	time = ksmbd_UnixTimeToNT(inode->i_mtime);
>  	file_info->LastWriteTime = cpu_to_le64(time);
> -	time = ksmbd_UnixTimeToNT(inode->i_ctime);
> +	time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
>  	file_info->ChangeTime = cpu_to_le64(time);
>  	file_info->DosAttributes = fp->f_ci->m_fattr;
>  	file_info->Inode = cpu_to_le64(inode->i_ino);
> @@ -5422,7 +5422,7 @@ int smb2_close(struct ksmbd_work *work)
>  		rsp->LastAccessTime = cpu_to_le64(time);
>  		time = ksmbd_UnixTimeToNT(inode->i_mtime);
>  		rsp->LastWriteTime = cpu_to_le64(time);
> -		time = ksmbd_UnixTimeToNT(inode->i_ctime);
> +		time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
>  		rsp->ChangeTime = cpu_to_le64(time);
>  		ksmbd_fd_put(work, fp);
>  	} else {
> @@ -5644,7 +5644,7 @@ static int set_file_basic_info(struct ksmbd_file *fp,
>  	if (file_info->ChangeTime)
>  		attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
>  	else
> -		attrs.ia_ctime = inode->i_ctime;
> +		attrs.ia_ctime = inode_get_ctime(inode);
>  
>  	if (file_info->LastWriteTime) {
>  		attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
> @@ -5689,7 +5689,7 @@ static int set_file_basic_info(struct ksmbd_file *fp,
>  			return -EACCES;
>  
>  		inode_lock(inode);
> -		inode->i_ctime = attrs.ia_ctime;
> +		inode_set_ctime_to_ts(inode, attrs.ia_ctime);
>  		attrs.ia_valid &= ~ATTR_CTIME;
>  		rc = notify_change(idmap, dentry, &attrs, NULL);
>  		inode_unlock(inode);

-- 
Jeff Layton <jlayton@kernel.org>