diff options
Diffstat (limited to 'drivers/block/drbd/drbd_bitmap.c')
| -rw-r--r-- | drivers/block/drbd/drbd_bitmap.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c index 3390716898d..e3f88d6e141 100644 --- a/drivers/block/drbd/drbd_bitmap.c +++ b/drivers/block/drbd/drbd_bitmap.c @@ -84,6 +84,9 @@ struct drbd_bitmap { #define BM_MD_IO_ERROR 1 #define BM_P_VMALLOCED 2 +static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, + unsigned long e, int val, const enum km_type km); + static int bm_is_locked(struct drbd_bitmap *b) { return test_bit(BM_LOCKED, &b->bm_flags); @@ -441,7 +444,7 @@ static void bm_memset(struct drbd_bitmap *b, size_t offset, int c, size_t len) * In case this is actually a resize, we copy the old bitmap into the new one. * Otherwise, the bitmap is initialized to all bits set. */ -int drbd_bm_resize(struct drbd_conf *mdev, sector_t capacity) +int drbd_bm_resize(struct drbd_conf *mdev, sector_t capacity, int set_new_bits) { struct drbd_bitmap *b = mdev->bitmap; unsigned long bits, words, owords, obits, *p_addr, *bm; @@ -516,7 +519,7 @@ int drbd_bm_resize(struct drbd_conf *mdev, sector_t capacity) obits = b->bm_bits; growing = bits > obits; - if (opages) + if (opages && growing && set_new_bits) bm_set_surplus(b); b->bm_pages = npages; @@ -526,8 +529,12 @@ int drbd_bm_resize(struct drbd_conf *mdev, sector_t capacity) b->bm_dev_capacity = capacity; if (growing) { - bm_memset(b, owords, 0xff, words-owords); - b->bm_set += bits - obits; + if (set_new_bits) { + bm_memset(b, owords, 0xff, words-owords); + b->bm_set += bits - obits; + } else + bm_memset(b, owords, 0x00, words-owords); + } if (want < have) { @@ -773,7 +780,7 @@ static void bm_page_io_async(struct drbd_conf *mdev, struct drbd_bitmap *b, int /* nothing to do, on disk == in memory */ # define bm_cpu_to_lel(x) ((void)0) # else -void bm_cpu_to_lel(struct drbd_bitmap *b) +static void bm_cpu_to_lel(struct drbd_bitmap *b) { /* need to cpu_to_lel all the pages ... * this may be optimized by using @@ -1015,7 +1022,7 @@ unsigned long _drbd_bm_find_next_zero(struct drbd_conf *mdev, unsigned long bm_f * wants bitnr, not sector. * expected to be called for only a few bits (e - s about BITS_PER_LONG). * Must hold bitmap lock already. */ -int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, +static int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, unsigned long e, int val, const enum km_type km) { struct drbd_bitmap *b = mdev->bitmap; @@ -1053,7 +1060,7 @@ int __bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, * for val != 0, we change 0 -> 1, return code positive * for val == 0, we change 1 -> 0, return code negative * wants bitnr, not sector */ -int bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, +static int bm_change_bits_to(struct drbd_conf *mdev, const unsigned long s, const unsigned long e, int val) { unsigned long flags; |