Commit fc6612f6 authored by David Woodhouse's avatar David Woodhouse
Browse files

[JFFS2] When retiring nextblock, allocate a node_ref for the wasted space 



Failing to do so makes the calculated length of the last node incorrect,
when we're not using eraseblock summaries.

Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent 2ba72cb7

fs/jffs2/nodemgmt.c

+22 −4
Original line number Diff line number Diff line
@@ -317,6 +317,8 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, 
		}

	} else {

		if (jeb && minsize > jeb->free_size) {

			uint32_t waste;



			/* Skip the end of this block and file it as having some dirty space */

			/* If there's a pending write to it, flush now */
@@ -329,10 +331,26 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, 
				goto restart;

			}



			c->wasted_size += jeb->free_size;

			c->free_size -= jeb->free_size;

			jeb->wasted_size += jeb->free_size;

			jeb->free_size = 0;

			spin_unlock(&c->erase_completion_lock);



			ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);

			if (ret)

				return ret;

			/* Just lock it again and continue. Nothing much can change because

			   we hold c->alloc_sem anyway. In fact, it's not entirely clear why

			   we hold c->erase_completion_lock in the majority of this function...

			   but that's a question for another (more caffeine-rich) day. */

			spin_lock(&c->erase_completion_lock);



			waste = jeb->free_size;

			jffs2_link_node_ref(c, jeb,

					    (jeb->offset + c->sector_size - waste) | REF_OBSOLETE,

					    waste, NULL);

			/* FIXME: that made it count as dirty. Convert to wasted */

			jeb->dirty_size -= waste;

			c->dirty_size -= waste;

			jeb->wasted_size += waste;

			c->wasted_size += waste;



			jffs2_close_nextblock(c, jeb);

			jeb = NULL;