diff options
Diffstat (limited to 'drivers/block/rnbd/rnbd-clt.c')
| -rw-r--r-- | drivers/block/rnbd/rnbd-clt.c | 94 |
1 files changed, 56 insertions, 38 deletions
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c index a199b190c73d..96e3f9fe8241 100644 --- a/drivers/block/rnbd/rnbd-clt.c +++ b/drivers/block/rnbd/rnbd-clt.c @@ -88,6 +88,8 @@ static int rnbd_clt_set_dev_attr(struct rnbd_clt_dev *dev, dev->discard_alignment = le32_to_cpu(rsp->discard_alignment); dev->secure_discard = le16_to_cpu(rsp->secure_discard); dev->rotational = rsp->rotational; + dev->wc = !!(rsp->cache_policy & RNBD_WRITEBACK); + dev->fua = !!(rsp->cache_policy & RNBD_FUA); dev->max_hw_sectors = sess->max_io_size / SECTOR_SIZE; dev->max_segments = BMAX_SEGMENTS; @@ -347,19 +349,26 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess, struct rnbd_iu *iu; struct rtrs_permit *permit; + iu = kzalloc(sizeof(*iu), GFP_KERNEL); + if (!iu) { + return NULL; + } + permit = rnbd_get_permit(sess, con_type, wait ? RTRS_PERMIT_WAIT : RTRS_PERMIT_NOWAIT); - if (unlikely(!permit)) + if (unlikely(!permit)) { + kfree(iu); return NULL; - iu = rtrs_permit_to_pdu(permit); + } + iu->permit = permit; /* * 1st reference is dropped after finishing sending a "user" message, * 2nd reference is dropped after confirmation with the response is * returned. * 1st and 2nd can happen in any order, so the rnbd_iu should be - * released (rtrs_permit returned to ibbtrs) only leased after both + * released (rtrs_permit returned to rtrs) only after both * are finished. */ atomic_set(&iu->refcount, 2); @@ -371,8 +380,10 @@ static struct rnbd_iu *rnbd_get_iu(struct rnbd_clt_session *sess, static void rnbd_put_iu(struct rnbd_clt_session *sess, struct rnbd_iu *iu) { - if (atomic_dec_and_test(&iu->refcount)) + if (atomic_dec_and_test(&iu->refcount)) { rnbd_put_permit(sess, iu->permit); + kfree(iu); + } } static void rnbd_softirq_done_fn(struct request *rq) @@ -382,6 +393,7 @@ static void rnbd_softirq_done_fn(struct request *rq) struct rnbd_iu *iu; iu = blk_mq_rq_to_pdu(rq); + sg_free_table_chained(&iu->sgt, RNBD_INLINE_SG_CNT); rnbd_put_permit(sess, iu->permit); blk_mq_end_request(rq, errno_to_blk_status(iu->errno)); } @@ -475,7 +487,7 @@ static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id, bool wait) iu->buf = NULL; iu->dev = dev; - sg_mark_end(&iu->sglist[0]); + sg_alloc_table(&iu->sgt, 1, GFP_KERNEL); msg.hdr.type = cpu_to_le16(RNBD_MSG_CLOSE); msg.device_id = cpu_to_le32(device_id); @@ -490,6 +502,7 @@ static int send_msg_close(struct rnbd_clt_dev *dev, u32 device_id, bool wait) err = errno; } + sg_free_table(&iu->sgt); rnbd_put_iu(sess, iu); return err; } @@ -562,7 +575,8 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait) iu->buf = rsp; iu->dev = dev; - sg_init_one(iu->sglist, rsp, sizeof(*rsp)); + sg_alloc_table(&iu->sgt, 1, GFP_KERNEL); + sg_init_one(iu->sgt.sgl, rsp, sizeof(*rsp)); msg.hdr.type = cpu_to_le16(RNBD_MSG_OPEN); msg.access_mode = dev->access_mode; @@ -570,7 +584,7 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait) WARN_ON(!rnbd_clt_get_dev(dev)); err = send_usr_msg(sess->rtrs, READ, iu, - &vec, sizeof(*rsp), iu->sglist, 1, + &vec, sizeof(*rsp), iu->sgt.sgl, 1, msg_open_conf, &errno, wait); if (err) { rnbd_clt_put_dev(dev); @@ -580,6 +594,7 @@ static int send_msg_open(struct rnbd_clt_dev *dev, bool wait) err = errno; } + sg_free_table(&iu->sgt); rnbd_put_iu(sess, iu); return err; } @@ -608,7 +623,8 @@ static int send_msg_sess_info(struct rnbd_clt_session *sess, bool wait) iu->buf = rsp; iu->sess = sess; - sg_init_one(iu->sglist, rsp, sizeof(*rsp)); + sg_alloc_table(&iu->sgt, 1, GFP_KERNEL); + sg_init_one(iu->sgt.sgl, rsp, sizeof(*rsp)); msg.hdr.type = cpu_to_le16(RNBD_MSG_SESS_INFO); msg.ver = RNBD_PROTO_VER_MAJOR; @@ -624,7 +640,7 @@ static int send_msg_sess_info(struct rnbd_clt_session *sess, bool wait) goto put_iu; } err = send_usr_msg(sess->rtrs, READ, iu, - &vec, sizeof(*rsp), iu->sglist, 1, + &vec, sizeof(*rsp), iu->sgt.sgl, 1, msg_sess_info_conf, &errno, wait); if (err) { rnbd_clt_put_sess(sess); @@ -634,7 +650,7 @@ put_iu: } else { err = errno; } - + sg_free_table(&iu->sgt); rnbd_put_iu(sess, iu); return err; } @@ -803,7 +819,7 @@ static struct rnbd_clt_session *alloc_sess(const char *sessname) rnbd_init_cpu_qlists(sess->cpu_queues); /* - * That is simple percpu variable which stores cpu indeces, which are + * That is simple percpu variable which stores cpu indices, which are * incremented on each access. We need that for the sake of fairness * to wake up queues in a round-robin manner. */ @@ -1014,11 +1030,10 @@ static int rnbd_client_xfer_request(struct rnbd_clt_dev *dev, * See queue limits. */ if (req_op(rq) != REQ_OP_DISCARD) - sg_cnt = blk_rq_map_sg(dev->queue, rq, iu->sglist); + sg_cnt = blk_rq_map_sg(dev->queue, rq, iu->sgt.sgl); if (sg_cnt == 0) - /* Do not forget to mark the end */ - sg_mark_end(&iu->sglist[0]); + sg_mark_end(&iu->sgt.sgl[0]); msg.hdr.type = cpu_to_le16(RNBD_MSG_IO); msg.device_id = cpu_to_le32(dev->device_id); @@ -1027,13 +1042,13 @@ static int rnbd_client_xfer_request(struct rnbd_clt_dev *dev, .iov_base = &msg, .iov_len = sizeof(msg) }; - size = rnbd_clt_get_sg_size(iu->sglist, sg_cnt); + size = rnbd_clt_get_sg_size(iu->sgt.sgl, sg_cnt); req_ops = (struct rtrs_clt_req_ops) { .priv = iu, .conf_fn = msg_io_conf, }; err = rtrs_clt_request(rq_data_dir(rq), &req_ops, rtrs, permit, - &vec, 1, size, iu->sglist, sg_cnt); + &vec, 1, size, iu->sgt.sgl, sg_cnt); if (unlikely(err)) { rnbd_clt_err_rl(dev, "RTRS failed to transfer IO, err: %d\n", err); @@ -1120,6 +1135,7 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx, struct rnbd_clt_dev *dev = rq->rq_disk->private_data; struct rnbd_iu *iu = blk_mq_rq_to_pdu(rq); int err; + blk_status_t ret = BLK_STS_IOERR; if (unlikely(dev->dev_state != DEV_STATE_MAPPED)) return BLK_STS_IOERR; @@ -1131,32 +1147,35 @@ static blk_status_t rnbd_queue_rq(struct blk_mq_hw_ctx *hctx, return BLK_STS_RESOURCE; } + iu->sgt.sgl = iu->first_sgl; + err = sg_alloc_table_chained(&iu->sgt, + /* Even-if the request has no segment, + * sglist must have one entry at least */ + blk_rq_nr_phys_segments(rq) ? : 1, + iu->sgt.sgl, + RNBD_INLINE_SG_CNT); + if (err) { + rnbd_clt_err_rl(dev, "sg_alloc_table_chained ret=%d\n", err); + rnbd_clt_dev_kick_mq_queue(dev, hctx, 10/*ms*/); + rnbd_put_permit(dev->sess, iu->permit); + return BLK_STS_RESOURCE; + } + blk_mq_start_request(rq); err = rnbd_client_xfer_request(dev, rq, iu); if (likely(err == 0)) return BLK_STS_OK; if (unlikely(err == -EAGAIN || err == -ENOMEM)) { rnbd_clt_dev_kick_mq_queue(dev, hctx, 10/*ms*/); - rnbd_put_permit(dev->sess, iu->permit); - return BLK_STS_RESOURCE; + ret = BLK_STS_RESOURCE; } - + sg_free_table_chained(&iu->sgt, RNBD_INLINE_SG_CNT); rnbd_put_permit(dev->sess, iu->permit); - return BLK_STS_IOERR; -} - -static int rnbd_init_request(struct blk_mq_tag_set *set, struct request *rq, - unsigned int hctx_idx, unsigned int numa_node) -{ - struct rnbd_iu *iu = blk_mq_rq_to_pdu(rq); - - sg_init_table(iu->sglist, BMAX_SEGMENTS); - return 0; + return ret; } static struct blk_mq_ops rnbd_mq_ops = { .queue_rq = rnbd_queue_rq, - .init_request = rnbd_init_request, .complete = rnbd_softirq_done_fn, }; @@ -1170,7 +1189,7 @@ static int setup_mq_tags(struct rnbd_clt_session *sess) tag_set->numa_node = NUMA_NO_NODE; tag_set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_TAG_QUEUE_SHARED; - tag_set->cmd_size = sizeof(struct rnbd_iu); + tag_set->cmd_size = sizeof(struct rnbd_iu) + RNBD_RDMA_SGL_SIZE; tag_set->nr_hw_queues = num_online_cpus(); return blk_mq_alloc_tag_set(tag_set); @@ -1208,7 +1227,7 @@ find_and_get_or_create_sess(const char *sessname, */ sess->rtrs = rtrs_clt_open(&rtrs_ops, sessname, paths, path_cnt, port_nr, - sizeof(struct rnbd_iu), + 0, /* Do not use pdu of rtrs */ RECONNECT_DELAY, BMAX_SEGMENTS, BLK_MAX_SEGMENT_SIZE, MAX_RECONNECTS); @@ -1305,7 +1324,7 @@ static void setup_request_queue(struct rnbd_clt_dev *dev) blk_queue_max_segments(dev->queue, dev->max_segments); blk_queue_io_opt(dev->queue, dev->sess->max_io_size); blk_queue_virt_boundary(dev->queue, SZ_4K - 1); - blk_queue_write_cache(dev->queue, true, true); + blk_queue_write_cache(dev->queue, dev->wc, dev->fua); dev->queue->queuedata = dev; } @@ -1388,12 +1407,11 @@ static struct rnbd_clt_dev *init_dev(struct rnbd_clt_session *sess, goto out_queues; } - dev->pathname = kzalloc(strlen(pathname) + 1, GFP_KERNEL); + dev->pathname = kstrdup(pathname, GFP_KERNEL); if (!dev->pathname) { ret = -ENOMEM; goto out_queues; } - strlcpy(dev->pathname, pathname, strlen(pathname) + 1); dev->clt_device_id = ret; dev->sess = sess; @@ -1529,13 +1547,13 @@ struct rnbd_clt_dev *rnbd_clt_map_device(const char *sessname, } rnbd_clt_info(dev, - "map_device: Device mapped as %s (nsectors: %zu, logical_block_size: %d, physical_block_size: %d, max_write_same_sectors: %d, max_discard_sectors: %d, discard_granularity: %d, discard_alignment: %d, secure_discard: %d, max_segments: %d, max_hw_sectors: %d, rotational: %d)\n", + "map_device: Device mapped as %s (nsectors: %zu, logical_block_size: %d, physical_block_size: %d, max_write_same_sectors: %d, max_discard_sectors: %d, discard_granularity: %d, discard_alignment: %d, secure_discard: %d, max_segments: %d, max_hw_sectors: %d, rotational: %d, wc: %d, fua: %d)\n", dev->gd->disk_name, dev->nsectors, dev->logical_block_size, dev->physical_block_size, dev->max_write_same_sectors, dev->max_discard_sectors, dev->discard_granularity, dev->discard_alignment, dev->secure_discard, dev->max_segments, - dev->max_hw_sectors, dev->rotational); + dev->max_hw_sectors, dev->rotational, dev->wc, dev->fua); mutex_unlock(&dev->lock); @@ -1667,7 +1685,7 @@ static void rnbd_destroy_sessions(void) /* * Here at this point there is no any concurrent access to sessions * list and devices list: - * 1. New session or device can'be be created - session sysfs files + * 1. New session or device can't be created - session sysfs files * are removed. * 2. Device or session can't be removed - module reference is taken * into account in unmap device sysfs callback. |