[Ocfs2-devel] [PATCH] ocfs2: Remove JBD compatibility layer

[Joel Becker <Joel.Becker@oracle.com>]

On Tue, Nov 18, 2008 at 05:00:07PM -0800, Mark Fasheh wrote:
> JBD2 is fully backwards compatible with JBD and it's been tested enough with
> Ocfs2 that we can clean this code up now.
> 
> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
sob

> ---
>  fs/Kconfig                  |   10 -----
>  fs/ocfs2/alloc.c            |    5 ---
>  fs/ocfs2/aops.c             |   24 +-----------
>  fs/ocfs2/journal.c          |   14 -------
>  fs/ocfs2/journal.h          |   11 +-----
>  fs/ocfs2/ocfs2_jbd_compat.h |   82 -------------------------------------------
>  6 files changed, 3 insertions(+), 143 deletions(-)
>  delete mode 100644 fs/ocfs2/ocfs2_jbd_compat.h
> 
> diff --git a/fs/Kconfig b/fs/Kconfig
> index 3af6024..55dc974 100644
> --- a/fs/Kconfig
> +++ b/fs/Kconfig
> @@ -258,16 +258,6 @@ config OCFS2_DEBUG_FS
>  	  this option for debugging only as it is likely to decrease
>  	  performance of the filesystem.
>  
> -config OCFS2_COMPAT_JBD
> -	bool "Use JBD for compatibility"
> -	depends on OCFS2_FS
> -	default n
> -	select JBD
> -	help
> -	  The ocfs2 filesystem now uses JBD2 for its journalling.  JBD2
> -	  is backwards compatible with JBD.  It is safe to say N here.
> -	  However, if you really want to use the original JBD, say Y here.
> -
>  config OCFS2_FS_POSIX_ACL
>  	bool "OCFS2 POSIX Access Control Lists"
>  	depends on OCFS2_FS
> diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
> index e823a27..69d67ab 100644
> --- a/fs/ocfs2/alloc.c
> +++ b/fs/ocfs2/alloc.c
> @@ -6638,11 +6638,6 @@ static void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
>  		mlog_errno(ret);
>  	else if (ocfs2_should_order_data(inode)) {
>  		ret = ocfs2_jbd2_file_inode(handle, inode);
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -		ret = walk_page_buffers(handle, page_buffers(page),
> -					from, to, &partial,
> -					ocfs2_journal_dirty_data);
> -#endif
>  		if (ret < 0)
>  			mlog_errno(ret);
>  	}
> diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
> index e219f8b..6af79ad 100644
> --- a/fs/ocfs2/aops.c
> +++ b/fs/ocfs2/aops.c
> @@ -474,12 +474,6 @@ handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
>  
>  	if (ocfs2_should_order_data(inode)) {
>  		ret = ocfs2_jbd2_file_inode(handle, inode);
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -		ret = walk_page_buffers(handle,
> -					page_buffers(page),
> -					from, to, NULL,
> -					ocfs2_journal_dirty_data);
> -#endif
>  		if (ret < 0)
>  			mlog_errno(ret);
>  	}
> @@ -1065,15 +1059,8 @@ static void ocfs2_write_failure(struct inode *inode,
>  		tmppage = wc->w_pages[i];
>  
>  		if (page_has_buffers(tmppage)) {
> -			if (ocfs2_should_order_data(inode)) {
> +			if (ocfs2_should_order_data(inode))
>  				ocfs2_jbd2_file_inode(wc->w_handle, inode);
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -				walk_page_buffers(wc->w_handle,
> -						  page_buffers(tmppage),
> -						  from, to, NULL,
> -						  ocfs2_journal_dirty_data);
> -#endif
> -			}
>  
>  			block_commit_write(tmppage, from, to);
>  		}
> @@ -1912,15 +1899,8 @@ int ocfs2_write_end_nolock(struct address_space *mapping,
>  		}
>  
>  		if (page_has_buffers(tmppage)) {
> -			if (ocfs2_should_order_data(inode)) {
> +			if (ocfs2_should_order_data(inode))
>  				ocfs2_jbd2_file_inode(wc->w_handle, inode);
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -				walk_page_buffers(wc->w_handle,
> -						  page_buffers(tmppage),
> -						  from, to, NULL,
> -						  ocfs2_journal_dirty_data);
> -#endif
> -			}
>  			block_commit_write(tmppage, from, to);
>  		}
>  	}
> diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
> index 9223bfc..12b62a3 100644
> --- a/fs/ocfs2/journal.c
> +++ b/fs/ocfs2/journal.c
> @@ -434,20 +434,6 @@ int ocfs2_journal_dirty(handle_t *handle,
>  	return status;
>  }
>  
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -int ocfs2_journal_dirty_data(handle_t *handle,
> -			     struct buffer_head *bh)
> -{
> -	int err = journal_dirty_data(handle, bh);
> -	if (err)
> -		mlog_errno(err);
> -	/* TODO: When we can handle it, abort the handle and go RO on
> -	 * error here. */
> -
> -	return err;
> -}
> -#endif
> -
>  #define OCFS2_DEFAULT_COMMIT_INTERVAL	(HZ * JBD2_DEFAULT_MAX_COMMIT_AGE)
>  
>  void ocfs2_set_journal_params(struct ocfs2_super *osb)
> diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
> index d4d14e9..8203980 100644
> --- a/fs/ocfs2/journal.h
> +++ b/fs/ocfs2/journal.h
> @@ -27,12 +27,7 @@
>  #define OCFS2_JOURNAL_H
>  
>  #include <linux/fs.h>
> -#ifndef CONFIG_OCFS2_COMPAT_JBD
> -# include <linux/jbd2.h>
> -#else
> -# include <linux/jbd.h>
> -# include "ocfs2_jbd_compat.h"
> -#endif
> +#include <linux/jbd2.h>
>  
>  enum ocfs2_journal_state {
>  	OCFS2_JOURNAL_FREE = 0,
> @@ -273,10 +268,6 @@ int                  ocfs2_journal_access(handle_t *handle,
>   */
>  int                  ocfs2_journal_dirty(handle_t *handle,
>  					 struct buffer_head *bh);
> -#ifdef CONFIG_OCFS2_COMPAT_JBD
> -int                  ocfs2_journal_dirty_data(handle_t *handle,
> -					      struct buffer_head *bh);
> -#endif
>  
>  /*
>   *  Credit Macros:
> diff --git a/fs/ocfs2/ocfs2_jbd_compat.h b/fs/ocfs2/ocfs2_jbd_compat.h
> deleted file mode 100644
> index b91c78f..0000000
> --- a/fs/ocfs2/ocfs2_jbd_compat.h
> +++ /dev/null
> @@ -1,82 +0,0 @@
> -/* -*- mode: c; c-basic-offset: 8; -*-
> - * vim: noexpandtab sw=8 ts=8 sts=0:
> - *
> - * ocfs2_jbd_compat.h
> - *
> - * Compatibility defines for JBD.
> - *
> - * Copyright (C) 2008 Oracle.  All rights reserved.
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public
> - * License version 2 as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License for more details.
> - */
> -
> -#ifndef OCFS2_JBD_COMPAT_H
> -#define OCFS2_JBD_COMPAT_H
> -
> -#ifndef CONFIG_OCFS2_COMPAT_JBD
> -# error Should not have been included
> -#endif
> -
> -struct jbd2_inode {
> -	unsigned int dummy;
> -};
> -
> -#define JBD2_BARRIER			JFS_BARRIER
> -#define JBD2_DEFAULT_MAX_COMMIT_AGE	JBD_DEFAULT_MAX_COMMIT_AGE
> -
> -#define jbd2_journal_ack_err			journal_ack_err
> -#define jbd2_journal_clear_err			journal_clear_err
> -#define jbd2_journal_destroy			journal_destroy
> -#define jbd2_journal_dirty_metadata		journal_dirty_metadata
> -#define jbd2_journal_errno			journal_errno
> -#define jbd2_journal_extend			journal_extend
> -#define jbd2_journal_flush			journal_flush
> -#define jbd2_journal_force_commit		journal_force_commit
> -#define jbd2_journal_get_write_access		journal_get_write_access
> -#define jbd2_journal_get_undo_access		journal_get_undo_access
> -#define jbd2_journal_init_inode			journal_init_inode
> -#define jbd2_journal_invalidatepage		journal_invalidatepage
> -#define jbd2_journal_load			journal_load
> -#define jbd2_journal_lock_updates		journal_lock_updates
> -#define jbd2_journal_restart			journal_restart
> -#define jbd2_journal_start			journal_start
> -#define jbd2_journal_start_commit		journal_start_commit
> -#define jbd2_journal_stop			journal_stop
> -#define jbd2_journal_try_to_free_buffers	journal_try_to_free_buffers
> -#define jbd2_journal_unlock_updates		journal_unlock_updates
> -#define jbd2_journal_wipe			journal_wipe
> -#define jbd2_log_wait_commit			log_wait_commit
> -
> -static inline int jbd2_journal_file_inode(handle_t *handle,
> -					  struct jbd2_inode *inode)
> -{
> -	return 0;
> -}
> -
> -static inline int jbd2_journal_begin_ordered_truncate(struct jbd2_inode *inode,
> -						      loff_t new_size)
> -{
> -	return 0;
> -}
> -
> -static inline void jbd2_journal_init_jbd_inode(struct jbd2_inode *jinode,
> -					       struct inode *inode)
> -{
> -	return;
> -}
> -
> -static inline void jbd2_journal_release_jbd_inode(journal_t *journal,
> -						  struct jbd2_inode *jinode)
> -{
> -	return;
> -}
> -
> -
> -#endif  /* OCFS2_JBD_COMPAT_H */
> -- 
> 1.5.4.1
> 

-- 

Life's Little Instruction Book #139

	"Never deprive someone of hope; it might be all they have."

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127