Applying InnoDB snapshot 5.1-ss6242, part 3. Fixes BUG#48469

1. BUG#4869 - when innodb tablespace is configured too small,
              crash and corruption!

Detailed revision comments:

r6187 | jyang | 2009-11-18 05:27:30 +0200 (Wed, 18 Nov 2009) | 9 lines
branches/5.1: Fix bug #48469 "when innodb tablespace is
configured too small, crash and corruption!". Function
btr_create() did not check the return status of fseg_create(),
and continue the index creation even there is no sufficient
space.

rb://205 Approved by Marko

r6200 | vasil | 2009-11-19 12:14:23 +0200 (Thu, 19 Nov 2009) | 4 lines
branches/5.1:

White space fixup - indent under the opening (

r6203 | jyang | 2009-11-19 15:12:22 +0200 (Thu, 19 Nov 2009) | 8 lines
branches/5.1: Use btr_free_root() instead of fseg_free() for
the fix of bug #48469, because fseg_free() is not defined
in the zip branch. And we could save one mini-trasaction started
by fseg_free().

Approved by Marko.

storage/innobase/btr/btr0btr.c

@@ -709,8 +709,15 @@ btr_create(
 	} else {
 		/* It is a non-ibuf tree: create a file segment for leaf
 		pages */
-		fseg_create(space, page_no, PAGE_HEADER + PAGE_BTR_SEG_LEAF,
-			    mtr);
+		if (!fseg_create(space, page_no,
+				 PAGE_HEADER + PAGE_BTR_SEG_LEAF, mtr)) {
+			/* Not enough space for new segment, free root
+			segment before return. */
+			btr_free_root(space, page_no, mtr);
+
+			return(FIL_NULL);
+		}
+
 		/* The fseg create acquires a second latch on the page,
 		therefore we must declare it: */
 #ifdef UNIV_SYNC_DEBUG