STATIC int w_update_odbm(struct drbd_conf *mdev, struct drbd_work *w, int unused)
{
struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w);
if (!get_ldev(mdev)) {
if (DRBD_ratelimit(5*HZ, 5))
dev_warn(DEV, "Can not update on disk bitmap, local IO disabled.\n");
kfree(udw);
return 1;
}
drbd_bm_write_page(mdev, rs_extent_to_bm_page(udw->enr));
put_ldev(mdev);
kfree(udw);
if (drbd_bm_total_weight(mdev) <= mdev->rs_failed) {
switch (mdev->state.conn) {
case C_SYNC_SOURCE: case C_SYNC_TARGET:
case C_PAUSED_SYNC_S: case C_PAUSED_SYNC_T:
drbd_resync_finished(mdev);
default:
/* nothing to do */
break;
}
}
drbd_bcast_sync_progress(mdev);
return 1;
}
/* rw is bio_data_dir(), only READ or WRITE */
static void _req_is_done(struct drbd_conf *mdev, struct drbd_request *req, const int rw)
{
const unsigned long s = req->rq_state;
/* remove it from the transfer log.
* well, only if it had been there in the first
* place... if it had not (local only or conflicting
* and never sent), it should still be "empty" as
* initialized in drbd_req_new(), so we can list_del() it
* here unconditionally */
list_del(&req->tl_requests);
/* if it was a write, we may have to set the corresponding
* bit(s) out-of-sync first. If it had a local part, we need to
* release the reference to the activity log. */
if (rw == WRITE) {
/* Set out-of-sync unless both OK flags are set
* (local only or remote failed).
* Other places where we set out-of-sync:
* READ with local io-error */
if (!(s & RQ_NET_OK) || !(s & RQ_LOCAL_OK))
drbd_set_out_of_sync(mdev, req->sector, req->size);
if ((s & RQ_NET_OK) && (s & RQ_LOCAL_OK) && (s & RQ_NET_SIS))
drbd_set_in_sync(mdev, req->sector, req->size);
/* one might be tempted to move the drbd_al_complete_io
* to the local io completion callback drbd_endio_pri.
* but, if this was a mirror write, we may only
* drbd_al_complete_io after this is RQ_NET_DONE,
* otherwise the extent could be dropped from the al
* before it has actually been written on the peer.
* if we crash before our peer knows about the request,
* but after the extent has been dropped from the al,
* we would forget to resync the corresponding extent.
*/
if (s & RQ_LOCAL_MASK) {
if (get_ldev_if_state(mdev, D_FAILED)) {
if (s & RQ_IN_ACT_LOG)
drbd_al_complete_io(mdev, req->sector);
put_ldev(mdev);
} else if (DRBD_ratelimit(5*HZ, 3)) {
dev_warn(DEV, "Should have called drbd_al_complete_io(, %llu), "
"but my Disk seems to have failed :(\n",
(unsigned long long) req->sector);
}
}
}
drbd_req_free(req);
}
int drbd_md_sync_page_io(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
sector_t sector, int rw)
{
int logical_block_size, mask, ok;
int offset = 0;
struct page *iop = mdev->md_io_page;
D_ASSERT(mutex_is_locked(&mdev->md_io_mutex));
if (!bdev->md_bdev) {
if (DRBD_ratelimit(5*HZ, 5)) {
dev_err(DEV, "bdev->md_bdev==NULL\n");
dump_stack();
}
return 0;
}
logical_block_size = bdev_logical_block_size(bdev->md_bdev);
if (logical_block_size == 0)
logical_block_size = MD_SECTOR_SIZE;
/* in case logical_block_size != 512 [ s390 only? ] */
if (logical_block_size != MD_SECTOR_SIZE) {
mask = (logical_block_size / MD_SECTOR_SIZE) - 1;
D_ASSERT(mask == 1 || mask == 3 || mask == 7);
D_ASSERT(logical_block_size == (mask+1) * MD_SECTOR_SIZE);
offset = sector & mask;
sector = sector & ~mask;
iop = mdev->md_io_tmpp;
if (rw & WRITE) {
/* these are GFP_KERNEL pages, pre-allocated
* on device initialization */
void *p = page_address(mdev->md_io_page);
void *hp = page_address(mdev->md_io_tmpp);
ok = _drbd_md_sync_page_io(mdev, bdev, iop, sector,
READ, logical_block_size);
if (unlikely(!ok)) {
dev_err(DEV, "drbd_md_sync_page_io(,%llus,"
"READ [logical_block_size!=512]) failed!\n",
(unsigned long long)sector);
return 0;
}
memcpy(hp + offset*MD_SECTOR_SIZE, p, MD_SECTOR_SIZE);
}
}
#if DUMP_MD >= 3
dev_info(DEV, "%s [%d]:%s(,%llus,%s)\n",
current->comm, current->pid, __func__,
(unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ");
#endif
if (sector < drbd_md_first_sector(bdev) ||
sector > drbd_md_last_sector(bdev))
dev_alert(DEV, "%s [%d]:%s(,%llus,%s) out of range md access!\n",
current->comm, current->pid, __func__,
(unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ");
ok = _drbd_md_sync_page_io(mdev, bdev, iop, sector, rw, logical_block_size);
if (unlikely(!ok)) {
dev_err(DEV, "drbd_md_sync_page_io(,%llus,%s) failed!\n",
(unsigned long long)sector, (rw & WRITE) ? "WRITE" : "READ");
return 0;
}
if (logical_block_size != MD_SECTOR_SIZE && !(rw & WRITE)) {
void *p = page_address(mdev->md_io_page);
void *hp = page_address(mdev->md_io_tmpp);
memcpy(p, hp + offset*MD_SECTOR_SIZE, MD_SECTOR_SIZE);
}
return ok;
}
