diff options
| author | NeilBrown <neilb@suse.de> | 2009-05-07 12:49:06 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-05-18 16:34:30 -0700 |
| commit | d2fcb86192e4ea49ba1317096fa0c0a4ecfb3cf9 (patch) | |
| tree | 15e852df9db0a7659de6f18f5cd8b530d0a08ad6 | |
| parent | 8742775d97caef1ec167c99162c778b25eaefd08 (diff) | |
md: fix some (more) errors with bitmaps on devices larger than 2TB.
commit db305e507d554430a69ede901a6308e6ecb72349 upstream.
If a write intent bitmap covers more than 2TB, we sometimes work with
values beyond 32bit, so these need to be sector_t. This patches
add the required casts to some unsigned longs that are being shifted
up.
This will affect any raid10 larger than 2TB, or any raid1/4/5/6 with
member devices that are larger than 2TB.
Signed-off-by: NeilBrown <neilb@suse.de>
Reported-by: "Mario 'BitKoenig' Holbe" <Mario.Holbe@TU-Ilmenau.DE>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/md/bitmap.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 719943763391..6d33d8acd205 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1015,9 +1015,11 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start) kunmap_atomic(paddr, KM_USER0); if (b) { /* if the disk bit is set, set the memory bit */ - bitmap_set_memory_bits(bitmap, i << CHUNK_BLOCK_SHIFT(bitmap), - ((i+1) << (CHUNK_BLOCK_SHIFT(bitmap)) >= start) - ); + int needed = ((sector_t)(i+1) << (CHUNK_BLOCK_SHIFT(bitmap)) + >= start); + bitmap_set_memory_bits(bitmap, + (sector_t)i << CHUNK_BLOCK_SHIFT(bitmap), + needed); bit_cnt++; set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN); } @@ -1153,8 +1155,9 @@ void bitmap_daemon_work(struct bitmap *bitmap) spin_lock_irqsave(&bitmap->lock, flags); clear_page_attr(bitmap, page, BITMAP_PAGE_CLEAN); } - bmc = bitmap_get_counter(bitmap, j << CHUNK_BLOCK_SHIFT(bitmap), - &blocks, 0); + bmc = bitmap_get_counter(bitmap, + (sector_t)j << CHUNK_BLOCK_SHIFT(bitmap), + &blocks, 0); if (bmc) { /* if (j < 100) printk("bitmap: j=%lu, *bmc = 0x%x\n", j, *bmc); @@ -1168,7 +1171,8 @@ void bitmap_daemon_work(struct bitmap *bitmap) } else if (*bmc == 1) { /* we can clear the bit */ *bmc = 0; - bitmap_count_page(bitmap, j << CHUNK_BLOCK_SHIFT(bitmap), + bitmap_count_page(bitmap, + (sector_t)j << CHUNK_BLOCK_SHIFT(bitmap), -1); /* clear the bit */ @@ -1484,7 +1488,7 @@ void bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e) unsigned long chunk; for (chunk = s; chunk <= e; chunk++) { - sector_t sec = chunk << CHUNK_BLOCK_SHIFT(bitmap); + sector_t sec = (sector_t)chunk << CHUNK_BLOCK_SHIFT(bitmap); bitmap_set_memory_bits(bitmap, sec, 1); bitmap_file_set_bit(bitmap, sec); } |