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Commit 1f593903 authored by NeilBrown's avatar NeilBrown
Browse files

md: support bitmaps on RAID10 arrays larger then 2 terabytes 



.. and other arrays with components larger than 2 terabytes.

We use a "long" rather than a "sector_t" in part of the bitmap
size calculations, which is sad.

Reported-by: default avatar"Mario 'BitKoenig' Holbe" <Mario.Holbe@TU-Ilmenau.DE>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent c03f6a19

drivers/md/bitmap.c

+3 −3
Original line number Diff line number Diff line
@@ -1590,7 +1590,7 @@ void bitmap_destroy(mddev_t *mddev) 
int bitmap_create(mddev_t *mddev)

{

	struct bitmap *bitmap;

	unsigned long blocks = mddev->resync_max_sectors;

	sector_t blocks = mddev->resync_max_sectors;

	unsigned long chunks;

	unsigned long pages;

	struct file *file = mddev->bitmap_file;
@@ -1632,8 +1632,8 @@ int bitmap_create(mddev_t *mddev) 
	bitmap->chunkshift = ffz(~bitmap->chunksize);



	/* now that chunksize and chunkshift are set, we can use these macros */

 	chunks = (blocks + CHUNK_BLOCK_RATIO(bitmap) - 1) /

			CHUNK_BLOCK_RATIO(bitmap);

 	chunks = (blocks + CHUNK_BLOCK_RATIO(bitmap) - 1) >>

			CHUNK_BLOCK_SHIFT(bitmap);

 	pages = (chunks + PAGE_COUNTER_RATIO - 1) / PAGE_COUNTER_RATIO;



	BUG_ON(!pages);