ocfs2: remove unused ocfs2_handle_add_inode()

We can also delete the unused infrastructure which was once in place to
support this functionality. ocfs2_inode_private loses ip_handle and
ip_handle_list. ocfs2_journal_handle loses handle_list.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/inode.c

@@ -1067,12 +1067,6 @@ void ocfs2_clear_inode(struct inode *inode)
 	mlog_bug_on_msg(oi->ip_open_count,
 			"Clear inode of %llu has open count %d\n",
 			(unsigned long long)oi->ip_blkno, oi->ip_open_count);
-	mlog_bug_on_msg(!list_empty(&oi->ip_handle_list),
-			"Clear inode of %llu has non empty handle list\n",
-			(unsigned long long)oi->ip_blkno);
-	mlog_bug_on_msg(oi->ip_handle,
-			"Clear inode of %llu has non empty handle pointer\n",
-			(unsigned long long)oi->ip_blkno);
 
 	/* Clear all other flags. */
 	oi->ip_flags = OCFS2_INODE_CACHE_INLINE;

fs/ocfs2/inode.h

@@ -48,13 +48,6 @@ struct ocfs2_inode_info
 
 	struct mutex			ip_io_mutex;
 
-	/* Used by the journalling code to attach an inode to a
-	 * handle.  These are protected by ip_io_mutex in order to lock
-	 * out other I/O to the inode until we either commit or
-	 * abort. */
-	struct list_head		ip_handle_list;
-	struct ocfs2_journal_handle	*ip_handle;
-
 	u32				ip_flags; /* see below */
 	u32				ip_attr; /* inode attributes */
 

fs/ocfs2/journal.c

@@ -128,7 +128,6 @@ struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb)
 	retval->k_handle = NULL;
 
 	INIT_LIST_HEAD(&retval->locks);
-	INIT_LIST_HEAD(&retval->inode_list);
 	retval->journal = osb->journal;
 
 	return retval;
@@ -202,51 +201,12 @@ struct ocfs2_journal_handle *ocfs2_start_trans(struct ocfs2_super *osb,
 	return ERR_PTR(ret);
 }
 
-void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle,
-			    struct inode *inode)
-{
-	BUG_ON(!handle);
-	BUG_ON(!inode);
-
-	atomic_inc(&inode->i_count);
-
-	/* we're obviously changing it... */
-	mutex_lock(&inode->i_mutex);
-
-	/* sanity check */
-	BUG_ON(OCFS2_I(inode)->ip_handle);
-	BUG_ON(!list_empty(&OCFS2_I(inode)->ip_handle_list));
-
-	OCFS2_I(inode)->ip_handle = handle;
-	list_move_tail(&(OCFS2_I(inode)->ip_handle_list), &(handle->inode_list));
-}
-
-static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle)
-{
-	struct list_head *p, *n;
-	struct inode *inode;
-	struct ocfs2_inode_info *oi;
-
-	list_for_each_safe(p, n, &handle->inode_list) {
-		oi = list_entry(p, struct ocfs2_inode_info,
-				ip_handle_list);
-		inode = &oi->vfs_inode;
-
-		OCFS2_I(inode)->ip_handle = NULL;
-		list_del_init(&OCFS2_I(inode)->ip_handle_list);
-
-		mutex_unlock(&inode->i_mutex);
-		iput(inode);
-	}
-}
-
 /* This is trivial so we do it out of the main commit
  * paths. Beware, it can be called from start_trans too! */
 static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle)
 {
 	mlog_entry_void();
 
-	ocfs2_handle_unlock_inodes(handle);
 	/* You are allowed to add journal locks before the transaction
 	 * has started. */
 	ocfs2_handle_cleanup_locks(handle->journal, handle);
@@ -272,9 +232,6 @@ void ocfs2_commit_trans(struct ocfs2_journal_handle *handle)
 		return;
 	}
 
-	/* release inode semaphores we took during this transaction */
-	ocfs2_handle_unlock_inodes(handle);
-
 	/* ocfs2_extend_trans may have had to call journal_restart
 	 * which will always commit the transaction, but may return
 	 * error for any number of reasons. If this is the case, we

fs/ocfs2/journal.h

@@ -149,8 +149,6 @@ struct ocfs2_journal_handle {
 	struct list_head    locks;     /* A bunch of locks to
 					* release on commit. This
 					* should be a list_head */
-
-	struct list_head     inode_list;
 };
 
 /* Exported only for the journal struct init code in super.c. Do not call. */
@@ -236,7 +234,6 @@ static inline void ocfs2_checkpoint_inode(struct inode *inode)
  *                          ocfs2_handle_add_lock to indicate that a lock needs
  *                          to be released at the end of that handle. Locks
  *                          will be released in the order that they are added.
- *  ocfs2_handle_add_inode - Add a locked inode to a transaction.
  */
 
 /* You must always start_trans with a number of buffs > 0, but it's
@@ -293,12 +290,6 @@ int                  ocfs2_journal_dirty_data(handle_t *handle,
 					      struct buffer_head *bh);
 int                  ocfs2_handle_add_lock(struct ocfs2_journal_handle *handle,
 					   struct inode *inode);
-/*
- * Use this to protect from other processes reading buffer state while
- * it's in flight.
- */
-void                 ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle,
-					    struct inode *inode);
 
 /*
  *  Credit Macros:

fs/ocfs2/super.c

@@ -914,9 +914,7 @@ static void ocfs2_inode_init_once(void *data,
 		oi->ip_open_count = 0;
 		spin_lock_init(&oi->ip_lock);
 		ocfs2_extent_map_init(&oi->vfs_inode);
-		INIT_LIST_HEAD(&oi->ip_handle_list);
 		INIT_LIST_HEAD(&oi->ip_io_markers);
-		oi->ip_handle = NULL;
 		oi->ip_created_trans = 0;
 		oi->ip_last_trans = 0;
 		oi->ip_dir_start_lookup = 0;