md-cluster/bitmap: fix wrong page num in bitmap_file_clear_bit and bitmap_file_set_bit

The pnum passed to set_page_attr and test_page_attr should from
0 to storage.file_pages - 1, but bitmap_file_set_bit and
bitmap_file_clear_bit call set_page_attr and test_page_attr with
page->index parameter while page->index has already added node_offset
before.

So we need to minus node_offset in both bitmap_file_clear_bit
and bitmap_file_set_bit.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index cf93bb8..de28c80 100644 (file)
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -903,6 +903,11 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
        struct page *page;
        void *kaddr;
        unsigned long chunk = block >> bitmap->counts.chunkshift;
+       struct bitmap_storage *store = &bitmap->storage;
+       unsigned long node_offset = 0;
+
+       if (mddev_is_clustered(bitmap->mddev))
+               node_offset = bitmap->cluster_slot * store->file_pages;
 
        page = filemap_get_page(&bitmap->storage, chunk);
        if (!page)
@@ -918,7 +923,7 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
        kunmap_atomic(kaddr);
        pr_debug("set file bit %lu page %lu\n", bit, page->index);
        /* record page number so it gets flushed to disk when unplug occurs */
-       set_page_attr(bitmap, page->index, BITMAP_PAGE_DIRTY);
+       set_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_DIRTY);
 }
 
 static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
@@ -927,6 +932,11 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
        struct page *page;
        void *paddr;
        unsigned long chunk = block >> bitmap->counts.chunkshift;
+       struct bitmap_storage *store = &bitmap->storage;
+       unsigned long node_offset = 0;
+
+       if (mddev_is_clustered(bitmap->mddev))
+               node_offset = bitmap->cluster_slot * store->file_pages;
 
        page = filemap_get_page(&bitmap->storage, chunk);
        if (!page)
@@ -938,8 +948,8 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
        else
                clear_bit_le(bit, paddr);
        kunmap_atomic(paddr);
-       if (!test_page_attr(bitmap, page->index, BITMAP_PAGE_NEEDWRITE)) {
-               set_page_attr(bitmap, page->index, BITMAP_PAGE_PENDING);
+       if (!test_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_NEEDWRITE)) {
+               set_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_PENDING);
                bitmap->allclean = 0;
        }
 }