diff options
Diffstat (limited to 'drivers/block/drbd/drbd_bitmap.c')
| -rw-r--r-- | drivers/block/drbd/drbd_bitmap.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c index 49603bc67fe4..9dab3700ca2d 100644 --- a/drivers/block/drbd/drbd_bitmap.c +++ b/drivers/block/drbd/drbd_bitmap.c @@ -1011,7 +1011,7 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must /* * bm_rw: read/write the whole bitmap from/to its on disk location. */ -static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_idx) __must_hold(local) +static int bm_rw(struct drbd_conf *mdev, int rw, unsigned flags, unsigned lazy_writeout_upper_idx) __must_hold(local) { struct bm_aio_ctx *ctx; struct drbd_bitmap *b = mdev->bitmap; @@ -1037,7 +1037,7 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id .mdev = mdev, .in_flight = ATOMIC_INIT(1), .done = 0, - .flags = lazy_writeout_upper_idx ? BM_AIO_COPY_PAGES : 0, + .flags = flags, .error = 0, .kref = { ATOMIC_INIT(2) }, }; @@ -1128,7 +1128,7 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id */ int drbd_bm_read(struct drbd_conf *mdev) __must_hold(local) { - return bm_rw(mdev, READ, 0); + return bm_rw(mdev, READ, 0, 0); } /** @@ -1139,7 +1139,7 @@ int drbd_bm_read(struct drbd_conf *mdev) __must_hold(local) */ int drbd_bm_write(struct drbd_conf *mdev) __must_hold(local) { - return bm_rw(mdev, WRITE, 0); + return bm_rw(mdev, WRITE, 0, 0); } /** @@ -1149,7 +1149,23 @@ int drbd_bm_write(struct drbd_conf *mdev) __must_hold(local) */ int drbd_bm_write_lazy(struct drbd_conf *mdev, unsigned upper_idx) __must_hold(local) { - return bm_rw(mdev, WRITE, upper_idx); + return bm_rw(mdev, WRITE, BM_AIO_COPY_PAGES, upper_idx); +} + +/** + * drbd_bm_write_copy_pages() - Write the whole bitmap to its on disk location. + * @mdev: DRBD device. + * + * Will only write pages that have changed since last IO. + * In contrast to drbd_bm_write(), this will copy the bitmap pages + * to temporary writeout pages. It is intended to trigger a full write-out + * while still allowing the bitmap to change, for example if a resync or online + * verify is aborted due to a failed peer disk, while local IO continues, or + * pending resync acks are still being processed. + */ +int drbd_bm_write_copy_pages(struct drbd_conf *mdev) __must_hold(local) +{ + return bm_rw(mdev, WRITE, BM_AIO_COPY_PAGES, 0); } |