diff options
Diffstat (limited to 'drivers/block/drbd/drbd_receiver.c')
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 88 |
1 files changed, 85 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index dcadea2b7bda..f5eef97ec47d 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1418,9 +1418,15 @@ int drbd_submit_peer_request(struct drbd_device *device, * so we can find it to present it in debugfs */ peer_req->submit_jif = jiffies; peer_req->flags |= EE_SUBMITTED; - spin_lock_irq(&device->resource->req_lock); - list_add_tail(&peer_req->w.list, &device->active_ee); - spin_unlock_irq(&device->resource->req_lock); + + /* If this was a resync request from receive_rs_deallocated(), + * it is already on the sync_ee list */ + if (list_empty(&peer_req->w.list)) { + spin_lock_irq(&device->resource->req_lock); + list_add_tail(&peer_req->w.list, &device->active_ee); + spin_unlock_irq(&device->resource->req_lock); + } + if (blkdev_issue_zeroout(device->ldev->backing_bdev, sector, data_size >> 9, GFP_NOIO, false)) peer_req->flags |= EE_WAS_ERROR; @@ -2585,6 +2591,7 @@ static int receive_DataRequest(struct drbd_connection *connection, struct packet case P_DATA_REQUEST: drbd_send_ack_rp(peer_device, P_NEG_DREPLY, p); break; + case P_RS_THIN_REQ: case P_RS_DATA_REQUEST: case P_CSUM_RS_REQUEST: case P_OV_REQUEST: @@ -2624,6 +2631,12 @@ static int receive_DataRequest(struct drbd_connection *connection, struct packet peer_req->flags |= EE_APPLICATION; goto submit; + case P_RS_THIN_REQ: + /* If at some point in the future we have a smart way to + find out if this data block is completely deallocated, + then we would do something smarter here than reading + the block... */ + peer_req->flags |= EE_RS_THIN_REQ; case P_RS_DATA_REQUEST: peer_req->w.cb = w_e_end_rsdata_req; fault_type = DRBD_FAULT_RS_RD; @@ -4599,6 +4612,72 @@ static int receive_out_of_sync(struct drbd_connection *connection, struct packet return 0; } +static int receive_rs_deallocated(struct drbd_connection *connection, struct packet_info *pi) +{ + struct drbd_peer_device *peer_device; + struct p_block_desc *p = pi->data; + struct drbd_device *device; + sector_t sector; + int size, err = 0; + + peer_device = conn_peer_device(connection, pi->vnr); + if (!peer_device) + return -EIO; + device = peer_device->device; + + sector = be64_to_cpu(p->sector); + size = be32_to_cpu(p->blksize); + + dec_rs_pending(device); + + if (get_ldev(device)) { + struct drbd_peer_request *peer_req; + const int op = REQ_OP_DISCARD; + + peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER, sector, + size, false, GFP_NOIO); + if (!peer_req) { + put_ldev(device); + return -ENOMEM; + } + + peer_req->w.cb = e_end_resync_block; + peer_req->submit_jif = jiffies; + peer_req->flags |= EE_IS_TRIM; + + spin_lock_irq(&device->resource->req_lock); + list_add_tail(&peer_req->w.list, &device->sync_ee); + spin_unlock_irq(&device->resource->req_lock); + + atomic_add(pi->size >> 9, &device->rs_sect_ev); + err = drbd_submit_peer_request(device, peer_req, op, 0, DRBD_FAULT_RS_WR); + + if (err) { + spin_lock_irq(&device->resource->req_lock); + list_del(&peer_req->w.list); + spin_unlock_irq(&device->resource->req_lock); + + drbd_free_peer_req(device, peer_req); + put_ldev(device); + err = 0; + goto fail; + } + + inc_unacked(device); + + /* No put_ldev() here. Gets called in drbd_endio_write_sec_final(), + as well as drbd_rs_complete_io() */ + } else { + fail: + drbd_rs_complete_io(device, sector); + drbd_send_ack_ex(peer_device, P_NEG_ACK, sector, size, ID_SYNCER); + } + + atomic_add(size >> 9, &device->rs_sect_in); + + return err; +} + struct data_cmd { int expect_payload; size_t pkt_size; @@ -4626,11 +4705,14 @@ static struct data_cmd drbd_cmd_handler[] = { [P_OV_REQUEST] = { 0, sizeof(struct p_block_req), receive_DataRequest }, [P_OV_REPLY] = { 1, sizeof(struct p_block_req), receive_DataRequest }, [P_CSUM_RS_REQUEST] = { 1, sizeof(struct p_block_req), receive_DataRequest }, + [P_RS_THIN_REQ] = { 0, sizeof(struct p_block_req), receive_DataRequest }, [P_DELAY_PROBE] = { 0, sizeof(struct p_delay_probe93), receive_skip }, [P_OUT_OF_SYNC] = { 0, sizeof(struct p_block_desc), receive_out_of_sync }, [P_CONN_ST_CHG_REQ] = { 0, sizeof(struct p_req_state), receive_req_conn_state }, [P_PROTOCOL_UPDATE] = { 1, sizeof(struct p_protocol), receive_protocol }, [P_TRIM] = { 0, sizeof(struct p_trim), receive_Data }, + [P_RS_DEALLOCATED] = { 0, sizeof(struct p_block_desc), receive_rs_deallocated }, + }; static void drbdd(struct drbd_connection *connection) |
