ocfs2: have ocfs2_extend_trans() take handle_t

No reason to use our wrapper struct in this function, so take the handle_t
directly.

Also fixes a bug where we were incorrectly setting the handle to NULL in
case of a failure from journal_restart()

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index f43bc5f..74b93f9 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -1074,7 +1074,7 @@
 		/* TODO: Perhaps we can calculate the bulk of the
 		 * credits up front rather than extending like
 		 * this. */
-		status = ocfs2_extend_trans(handle,
+		status = ocfs2_extend_trans(handle->k_handle,
 					    OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
 		if (status < 0) {
 			mlog_errno(status);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 1be74c4..d8bd2c3 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -566,7 +566,7 @@
 			credits = ocfs2_calc_extend_credits(osb->sb,
 							    fe,
 							    clusters_to_add);
-			status = ocfs2_extend_trans(handle, credits);
+			status = ocfs2_extend_trans(handle->k_handle, credits);
 			if (status < 0) {
 				/* handle still has to be committed at
 				 * this point. */
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index e26cd0c..7c0c57a 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -323,20 +323,18 @@
  * good because transaction ids haven't yet been recorded on the
  * cluster locks associated with this handle.
  */
-int ocfs2_extend_trans(struct ocfs2_journal_handle *handle,
-		       int nblocks)
+int ocfs2_extend_trans(handle_t *handle, int nblocks)
 {
 	int status;
 
 	BUG_ON(!handle);
-	BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED));
 	BUG_ON(!nblocks);
 
 	mlog_entry_void();
 
 	mlog(0, "Trying to extend transaction by %d blocks\n", nblocks);
 
-	status = journal_extend(handle->k_handle, nblocks);
+	status = journal_extend(handle, nblocks);
 	if (status < 0) {
 		mlog_errno(status);
 		goto bail;
@@ -344,9 +342,8 @@
 
 	if (status > 0) {
 		mlog(0, "journal_extend failed, trying journal_restart\n");
-		status = journal_restart(handle->k_handle, nblocks);
+		status = journal_restart(handle, nblocks);
 		if (status < 0) {
-			handle->k_handle = NULL;
 			mlog_errno(status);
 			goto bail;
 		}
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 35ae835..9f3d79d 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -264,8 +264,7 @@
 					       struct ocfs2_journal_handle *handle,
 					       int max_buffs);
 void			     ocfs2_commit_trans(struct ocfs2_journal_handle *handle);
-int			     ocfs2_extend_trans(struct ocfs2_journal_handle *handle,
-						int nblocks);
+int			     ocfs2_extend_trans(handle_t *handle, int nblocks);
 
 /*
  * Create access is for when we get a newly created buffer and we're