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path: root/drivers/block/drbd/drbd_main.c
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Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
-rw-r--r--drivers/block/drbd/drbd_main.c65
1 files changed, 49 insertions, 16 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 920ede2829d6..2e0e7fc1dbba 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1514,6 +1514,13 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* Do not change the order of the if above and the two below... */
if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */
+ /* we probably will start a resync soon.
+ * make sure those things are properly reset. */
+ mdev->rs_total = 0;
+ mdev->rs_failed = 0;
+ atomic_set(&mdev->rs_pending_cnt, 0);
+ drbd_rs_cancel_all(mdev);
+
drbd_send_uuids(mdev);
drbd_send_state(mdev, ns);
}
@@ -1630,9 +1637,24 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
eh = mdev->ldev->dc.on_io_error;
was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags);
- /* Immediately allow completion of all application IO, that waits
- for completion from the local disk. */
- tl_abort_disk_io(mdev);
+ if (was_io_error && eh == EP_CALL_HELPER)
+ drbd_khelper(mdev, "local-io-error");
+
+ /* Immediately allow completion of all application IO,
+ * that waits for completion from the local disk,
+ * if this was a force-detach due to disk_timeout
+ * or administrator request (drbdsetup detach --force).
+ * Do NOT abort otherwise.
+ * Aborting local requests may cause serious problems,
+ * if requests are completed to upper layers already,
+ * and then later the already submitted local bio completes.
+ * This can cause DMA into former bio pages that meanwhile
+ * have been re-used for other things.
+ * So aborting local requests may cause crashes,
+ * or even worse, silent data corruption.
+ */
+ if (test_and_clear_bit(FORCE_DETACH, &mdev->flags))
+ tl_abort_disk_io(mdev);
/* current state still has to be D_FAILED,
* there is only one way out: to D_DISKLESS,
@@ -1653,9 +1675,6 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
drbd_md_sync(mdev);
}
put_ldev(mdev);
-
- if (was_io_error && eh == EP_CALL_HELPER)
- drbd_khelper(mdev, "local-io-error");
}
/* second half of local IO error, failure to attach,
@@ -1669,10 +1688,6 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
"ASSERT FAILED: disk is %s while going diskless\n",
drbd_disk_str(mdev->state.disk));
- mdev->rs_total = 0;
- mdev->rs_failed = 0;
- atomic_set(&mdev->rs_pending_cnt, 0);
-
if (ns.conn >= C_CONNECTED)
drbd_send_state(mdev, ns);
@@ -2194,7 +2209,8 @@ int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags fl
{
struct p_sizes p;
sector_t d_size, u_size;
- int q_order_type, max_bio_size;
+ int q_order_type;
+ unsigned int max_bio_size;
int ok;
if (get_ldev_if_state(mdev, D_NEGOTIATING)) {
@@ -2203,7 +2219,7 @@ int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags fl
u_size = mdev->ldev->dc.disk_size;
q_order_type = drbd_queue_order_type(mdev);
max_bio_size = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9;
- max_bio_size = min_t(int, max_bio_size, DRBD_MAX_BIO_SIZE);
+ max_bio_size = min(max_bio_size, DRBD_MAX_BIO_SIZE);
put_ldev(mdev);
} else {
d_size = 0;
@@ -2214,7 +2230,7 @@ int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags fl
/* Never allow old drbd (up to 8.3.7) to see more than 32KiB */
if (mdev->agreed_pro_version <= 94)
- max_bio_size = min_t(int, max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
+ max_bio_size = min(max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
p.d_size = cpu_to_be64(d_size);
p.u_size = cpu_to_be64(u_size);
@@ -3541,6 +3557,22 @@ static int drbd_congested(void *congested_data, int bdi_bits)
goto out;
}
+ if (test_bit(CALLBACK_PENDING, &mdev->flags)) {
+ r |= (1 << BDI_async_congested);
+ /* Without good local data, we would need to read from remote,
+ * and that would need the worker thread as well, which is
+ * currently blocked waiting for that usermode helper to
+ * finish.
+ */
+ if (!get_ldev_if_state(mdev, D_UP_TO_DATE))
+ r |= (1 << BDI_sync_congested);
+ else
+ put_ldev(mdev);
+ r &= bdi_bits;
+ reason = 'c';
+ goto out;
+ }
+
if (get_ldev(mdev)) {
q = bdev_get_queue(mdev->ldev->backing_bdev);
r = bdi_congested(&q->backing_dev_info, bdi_bits);
@@ -3604,6 +3636,7 @@ struct drbd_conf *drbd_new_device(unsigned int minor)
q->backing_dev_info.congested_data = mdev;
blk_queue_make_request(q, drbd_make_request);
+ blk_queue_flush(q, REQ_FLUSH | REQ_FUA);
/* Setting the max_hw_sectors to an odd value of 8kibyte here
This triggers a max_bio_size message upon first attach or connect */
blk_queue_max_hw_sectors(q, DRBD_MAX_BIO_SIZE_SAFE >> 8);
@@ -3870,7 +3903,7 @@ void drbd_md_sync(struct drbd_conf *mdev)
if (!drbd_md_sync_page_io(mdev, mdev->ldev, sector, WRITE)) {
/* this was a try anyways ... */
dev_err(DEV, "meta data update failed!\n");
- drbd_chk_io_error(mdev, 1, true);
+ drbd_chk_io_error(mdev, 1, DRBD_META_IO_ERROR);
}
/* Update mdev->ldev->md.la_size_sect,
@@ -3950,9 +3983,9 @@ int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
spin_lock_irq(&mdev->req_lock);
if (mdev->state.conn < C_CONNECTED) {
- int peer;
+ unsigned int peer;
peer = be32_to_cpu(buffer->la_peer_max_bio_size);
- peer = max_t(int, peer, DRBD_MAX_BIO_SIZE_SAFE);
+ peer = max(peer, DRBD_MAX_BIO_SIZE_SAFE);
mdev->peer_max_bio_size = peer;
}
spin_unlock_irq(&mdev->req_lock);
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-25 16:55:01 +0000