diff options
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 135 |
1 files changed, 112 insertions, 23 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 2ba1494b2..100be556e 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -31,7 +31,7 @@ #include <linux/module.h> #include <linux/jiffies.h> #include <linux/drbd.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <asm/types.h> #include <net/sock.h> #include <linux/ctype.h> @@ -920,6 +920,31 @@ void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device) } } +/* communicated if (agreed_features & DRBD_FF_WSAME) */ +void assign_p_sizes_qlim(struct drbd_device *device, struct p_sizes *p, struct request_queue *q) +{ + if (q) { + p->qlim->physical_block_size = cpu_to_be32(queue_physical_block_size(q)); + p->qlim->logical_block_size = cpu_to_be32(queue_logical_block_size(q)); + p->qlim->alignment_offset = cpu_to_be32(queue_alignment_offset(q)); + p->qlim->io_min = cpu_to_be32(queue_io_min(q)); + p->qlim->io_opt = cpu_to_be32(queue_io_opt(q)); + p->qlim->discard_enabled = blk_queue_discard(q); + p->qlim->discard_zeroes_data = queue_discard_zeroes_data(q); + p->qlim->write_same_capable = !!q->limits.max_write_same_sectors; + } else { + q = device->rq_queue; + p->qlim->physical_block_size = cpu_to_be32(queue_physical_block_size(q)); + p->qlim->logical_block_size = cpu_to_be32(queue_logical_block_size(q)); + p->qlim->alignment_offset = 0; + p->qlim->io_min = cpu_to_be32(queue_io_min(q)); + p->qlim->io_opt = cpu_to_be32(queue_io_opt(q)); + p->qlim->discard_enabled = 0; + p->qlim->discard_zeroes_data = 0; + p->qlim->write_same_capable = 0; + } +} + int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enum dds_flags flags) { struct drbd_device *device = peer_device->device; @@ -928,29 +953,37 @@ int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enu sector_t d_size, u_size; int q_order_type; unsigned int max_bio_size; + unsigned int packet_size; + + sock = &peer_device->connection->data; + p = drbd_prepare_command(peer_device, sock); + if (!p) + return -EIO; + packet_size = sizeof(*p); + if (peer_device->connection->agreed_features & DRBD_FF_WSAME) + packet_size += sizeof(p->qlim[0]); + + memset(p, 0, packet_size); if (get_ldev_if_state(device, D_NEGOTIATING)) { - D_ASSERT(device, device->ldev->backing_bdev); + struct request_queue *q = bdev_get_queue(device->ldev->backing_bdev); d_size = drbd_get_max_capacity(device->ldev); rcu_read_lock(); u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; rcu_read_unlock(); q_order_type = drbd_queue_order_type(device); - max_bio_size = queue_max_hw_sectors(device->ldev->backing_bdev->bd_disk->queue) << 9; + max_bio_size = queue_max_hw_sectors(q) << 9; max_bio_size = min(max_bio_size, DRBD_MAX_BIO_SIZE); + assign_p_sizes_qlim(device, p, q); put_ldev(device); } else { d_size = 0; u_size = 0; q_order_type = QUEUE_ORDERED_NONE; max_bio_size = DRBD_MAX_BIO_SIZE; /* ... multiple BIOs per peer_request */ + assign_p_sizes_qlim(device, p, NULL); } - sock = &peer_device->connection->data; - p = drbd_prepare_command(peer_device, sock); - if (!p) - return -EIO; - if (peer_device->connection->agreed_pro_version <= 94) max_bio_size = min(max_bio_size, DRBD_MAX_SIZE_H80_PACKET); else if (peer_device->connection->agreed_pro_version < 100) @@ -962,7 +995,8 @@ int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enu p->max_bio_size = cpu_to_be32(max_bio_size); p->queue_order_type = cpu_to_be16(q_order_type); p->dds_flags = cpu_to_be16(flags); - return drbd_send_command(peer_device, sock, P_SIZES, sizeof(*p), NULL, 0); + + return drbd_send_command(peer_device, sock, P_SIZES, packet_size, NULL, 0); } /** @@ -1377,6 +1411,22 @@ int drbd_send_ack_ex(struct drbd_peer_device *peer_device, enum drbd_packet cmd, cpu_to_be64(block_id)); } +int drbd_send_rs_deallocated(struct drbd_peer_device *peer_device, + struct drbd_peer_request *peer_req) +{ + struct drbd_socket *sock; + struct p_block_desc *p; + + sock = &peer_device->connection->data; + p = drbd_prepare_command(peer_device, sock); + if (!p) + return -EIO; + p->sector = cpu_to_be64(peer_req->i.sector); + p->blksize = cpu_to_be32(peer_req->i.size); + p->pad = 0; + return drbd_send_command(peer_device, sock, P_RS_DEALLOCATED, sizeof(*p), NULL, 0); +} + int drbd_send_drequest(struct drbd_peer_device *peer_device, int cmd, sector_t sector, int size, u64 block_id) { @@ -1561,6 +1611,9 @@ static int _drbd_send_bio(struct drbd_peer_device *peer_device, struct bio *bio) ? 0 : MSG_MORE); if (err) return err; + /* REQ_OP_WRITE_SAME has only one segment */ + if (bio_op(bio) == REQ_OP_WRITE_SAME) + break; } return 0; } @@ -1579,6 +1632,9 @@ static int _drbd_send_zc_bio(struct drbd_peer_device *peer_device, struct bio *b bio_iter_last(bvec, iter) ? 0 : MSG_MORE); if (err) return err; + /* REQ_OP_WRITE_SAME has only one segment */ + if (bio_op(bio) == REQ_OP_WRITE_SAME) + break; } return 0; } @@ -1603,15 +1659,17 @@ static int _drbd_send_zc_ee(struct drbd_peer_device *peer_device, return 0; } -static u32 bio_flags_to_wire(struct drbd_connection *connection, unsigned long bi_rw) +static u32 bio_flags_to_wire(struct drbd_connection *connection, + struct bio *bio) { if (connection->agreed_pro_version >= 95) - return (bi_rw & REQ_SYNC ? DP_RW_SYNC : 0) | - (bi_rw & REQ_FUA ? DP_FUA : 0) | - (bi_rw & REQ_FLUSH ? DP_FLUSH : 0) | - (bi_rw & REQ_DISCARD ? DP_DISCARD : 0); + return (bio->bi_opf & REQ_SYNC ? DP_RW_SYNC : 0) | + (bio->bi_opf & REQ_FUA ? DP_FUA : 0) | + (bio->bi_opf & REQ_PREFLUSH ? DP_FLUSH : 0) | + (bio_op(bio) == REQ_OP_WRITE_SAME ? DP_WSAME : 0) | + (bio_op(bio) == REQ_OP_DISCARD ? DP_DISCARD : 0); else - return bi_rw & REQ_SYNC ? DP_RW_SYNC : 0; + return bio->bi_opf & REQ_SYNC ? DP_RW_SYNC : 0; } /* Used to send write or TRIM aka REQ_DISCARD requests @@ -1622,6 +1680,8 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * struct drbd_device *device = peer_device->device; struct drbd_socket *sock; struct p_data *p; + struct p_wsame *wsame = NULL; + void *digest_out; unsigned int dp_flags = 0; int digest_size; int err; @@ -1636,7 +1696,7 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * p->sector = cpu_to_be64(req->i.sector); p->block_id = (unsigned long)req; p->seq_num = cpu_to_be32(atomic_inc_return(&device->packet_seq)); - dp_flags = bio_flags_to_wire(peer_device->connection, req->master_bio->bi_rw); + dp_flags = bio_flags_to_wire(peer_device->connection, req->master_bio); if (device->state.conn >= C_SYNC_SOURCE && device->state.conn <= C_PAUSED_SYNC_T) dp_flags |= DP_MAY_SET_IN_SYNC; @@ -1657,12 +1717,29 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request * err = __send_command(peer_device->connection, device->vnr, sock, P_TRIM, sizeof(*t), NULL, 0); goto out; } + if (dp_flags & DP_WSAME) { + /* this will only work if DRBD_FF_WSAME is set AND the + * handshake agreed that all nodes and backend devices are + * WRITE_SAME capable and agree on logical_block_size */ + wsame = (struct p_wsame*)p; + digest_out = wsame + 1; + wsame->size = cpu_to_be32(req->i.size); + } else + digest_out = p + 1; /* our digest is still only over the payload. * TRIM does not carry any payload. */ if (digest_size) - drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, p + 1); - err = __send_command(peer_device->connection, device->vnr, sock, P_DATA, sizeof(*p) + digest_size, NULL, req->i.size); + drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, digest_out); + if (wsame) { + err = + __send_command(peer_device->connection, device->vnr, sock, P_WSAME, + sizeof(*wsame) + digest_size, NULL, + bio_iovec(req->master_bio).bv_len); + } else + err = + __send_command(peer_device->connection, device->vnr, sock, P_DATA, + sizeof(*p) + digest_size, NULL, req->i.size); if (!err) { /* For protocol A, we have to memcpy the payload into * socket buffers, as we may complete right away @@ -3061,7 +3138,7 @@ void drbd_md_write(struct drbd_device *device, void *b) D_ASSERT(device, drbd_md_ss(device->ldev) == device->ldev->md.md_offset); sector = device->ldev->md.md_offset; - if (drbd_md_sync_page_io(device, device->ldev, sector, WRITE)) { + if (drbd_md_sync_page_io(device, device->ldev, sector, REQ_OP_WRITE)) { /* this was a try anyways ... */ drbd_err(device, "meta data update failed!\n"); drbd_chk_io_error(device, 1, DRBD_META_IO_ERROR); @@ -3263,7 +3340,8 @@ int drbd_md_read(struct drbd_device *device, struct drbd_backing_dev *bdev) * Affects the paranoia out-of-range access check in drbd_md_sync_page_io(). */ bdev->md.md_size_sect = 8; - if (drbd_md_sync_page_io(device, bdev, bdev->md.md_offset, READ)) { + if (drbd_md_sync_page_io(device, bdev, bdev->md.md_offset, + REQ_OP_READ)) { /* NOTE: can't do normal error processing here as this is called BEFORE disk is attached */ drbd_err(device, "Error while reading metadata.\n"); @@ -3505,7 +3583,12 @@ static int w_bitmap_io(struct drbd_work *w, int unused) struct bm_io_work *work = &device->bm_io_work; int rv = -EIO; - D_ASSERT(device, atomic_read(&device->ap_bio_cnt) == 0); + if (work->flags != BM_LOCKED_CHANGE_ALLOWED) { + int cnt = atomic_read(&device->ap_bio_cnt); + if (cnt) + drbd_err(device, "FIXME: ap_bio_cnt %d, expected 0; queued for '%s'\n", + cnt, work->why); + } if (get_ldev(device)) { drbd_bm_lock(device, work->why, work->flags); @@ -3585,18 +3668,20 @@ void drbd_queue_bitmap_io(struct drbd_device *device, int drbd_bitmap_io(struct drbd_device *device, int (*io_fn)(struct drbd_device *), char *why, enum bm_flag flags) { + /* Only suspend io, if some operation is supposed to be locked out */ + const bool do_suspend_io = flags & (BM_DONT_CLEAR|BM_DONT_SET|BM_DONT_TEST); int rv; D_ASSERT(device, current != first_peer_device(device)->connection->worker.task); - if ((flags & BM_LOCKED_SET_ALLOWED) == 0) + if (do_suspend_io) drbd_suspend_io(device); drbd_bm_lock(device, why, flags); rv = io_fn(device); drbd_bm_unlock(device); - if ((flags & BM_LOCKED_SET_ALLOWED) == 0) + if (do_suspend_io) drbd_resume_io(device); return rv; @@ -3635,6 +3720,8 @@ const char *cmdname(enum drbd_packet cmd) * one PRO_VERSION */ static const char *cmdnames[] = { [P_DATA] = "Data", + [P_WSAME] = "WriteSame", + [P_TRIM] = "Trim", [P_DATA_REPLY] = "DataReply", [P_RS_DATA_REPLY] = "RSDataReply", [P_BARRIER] = "Barrier", @@ -3679,6 +3766,8 @@ const char *cmdname(enum drbd_packet cmd) [P_CONN_ST_CHG_REPLY] = "conn_st_chg_reply", [P_RETRY_WRITE] = "retry_write", [P_PROTOCOL_UPDATE] = "protocol_update", + [P_RS_THIN_REQ] = "rs_thin_req", + [P_RS_DEALLOCATED] = "rs_deallocated", /* enum drbd_packet, but not commands - obsoleted flags: * P_MAY_IGNORE |