13f2304f8SSagi Grimberg // SPDX-License-Identifier: GPL-2.0 23f2304f8SSagi Grimberg /* 33f2304f8SSagi Grimberg * NVMe over Fabrics TCP host. 43f2304f8SSagi Grimberg * Copyright (c) 2018 Lightbits Labs. All rights reserved. 53f2304f8SSagi Grimberg */ 63f2304f8SSagi Grimberg #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 73f2304f8SSagi Grimberg #include <linux/module.h> 83f2304f8SSagi Grimberg #include <linux/init.h> 93f2304f8SSagi Grimberg #include <linux/slab.h> 103f2304f8SSagi Grimberg #include <linux/err.h> 113f2304f8SSagi Grimberg #include <linux/nvme-tcp.h> 123f2304f8SSagi Grimberg #include <net/sock.h> 133f2304f8SSagi Grimberg #include <net/tcp.h> 143f2304f8SSagi Grimberg #include <linux/blk-mq.h> 153f2304f8SSagi Grimberg #include <crypto/hash.h> 163f2304f8SSagi Grimberg 173f2304f8SSagi Grimberg #include "nvme.h" 183f2304f8SSagi Grimberg #include "fabrics.h" 193f2304f8SSagi Grimberg 203f2304f8SSagi Grimberg struct nvme_tcp_queue; 213f2304f8SSagi Grimberg 223f2304f8SSagi Grimberg enum nvme_tcp_send_state { 233f2304f8SSagi Grimberg NVME_TCP_SEND_CMD_PDU = 0, 243f2304f8SSagi Grimberg NVME_TCP_SEND_H2C_PDU, 253f2304f8SSagi Grimberg NVME_TCP_SEND_DATA, 263f2304f8SSagi Grimberg NVME_TCP_SEND_DDGST, 273f2304f8SSagi Grimberg }; 283f2304f8SSagi Grimberg 293f2304f8SSagi Grimberg struct nvme_tcp_request { 303f2304f8SSagi Grimberg struct nvme_request req; 313f2304f8SSagi Grimberg void *pdu; 323f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 333f2304f8SSagi Grimberg u32 data_len; 343f2304f8SSagi Grimberg u32 pdu_len; 353f2304f8SSagi Grimberg u32 pdu_sent; 363f2304f8SSagi Grimberg u16 ttag; 373f2304f8SSagi Grimberg struct list_head entry; 38a7273d40SChristoph Hellwig __le32 ddgst; 393f2304f8SSagi Grimberg 403f2304f8SSagi Grimberg struct bio *curr_bio; 413f2304f8SSagi Grimberg struct iov_iter iter; 423f2304f8SSagi Grimberg 433f2304f8SSagi Grimberg /* send state */ 443f2304f8SSagi Grimberg size_t offset; 453f2304f8SSagi Grimberg size_t data_sent; 463f2304f8SSagi Grimberg enum nvme_tcp_send_state state; 473f2304f8SSagi Grimberg }; 483f2304f8SSagi Grimberg 493f2304f8SSagi Grimberg enum nvme_tcp_queue_flags { 503f2304f8SSagi Grimberg NVME_TCP_Q_ALLOCATED = 0, 513f2304f8SSagi Grimberg NVME_TCP_Q_LIVE = 1, 523f2304f8SSagi Grimberg }; 533f2304f8SSagi Grimberg 543f2304f8SSagi Grimberg enum nvme_tcp_recv_state { 553f2304f8SSagi Grimberg NVME_TCP_RECV_PDU = 0, 563f2304f8SSagi Grimberg NVME_TCP_RECV_DATA, 573f2304f8SSagi Grimberg NVME_TCP_RECV_DDGST, 583f2304f8SSagi Grimberg }; 593f2304f8SSagi Grimberg 603f2304f8SSagi Grimberg struct nvme_tcp_ctrl; 613f2304f8SSagi Grimberg struct nvme_tcp_queue { 623f2304f8SSagi Grimberg struct socket *sock; 633f2304f8SSagi Grimberg struct work_struct io_work; 643f2304f8SSagi Grimberg int io_cpu; 653f2304f8SSagi Grimberg 663f2304f8SSagi Grimberg spinlock_t lock; 673f2304f8SSagi Grimberg struct list_head send_list; 683f2304f8SSagi Grimberg 693f2304f8SSagi Grimberg /* recv state */ 703f2304f8SSagi Grimberg void *pdu; 713f2304f8SSagi Grimberg int pdu_remaining; 723f2304f8SSagi Grimberg int pdu_offset; 733f2304f8SSagi Grimberg size_t data_remaining; 743f2304f8SSagi Grimberg size_t ddgst_remaining; 753f2304f8SSagi Grimberg 763f2304f8SSagi Grimberg /* send state */ 773f2304f8SSagi Grimberg struct nvme_tcp_request *request; 783f2304f8SSagi Grimberg 793f2304f8SSagi Grimberg int queue_size; 803f2304f8SSagi Grimberg size_t cmnd_capsule_len; 813f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 823f2304f8SSagi Grimberg unsigned long flags; 833f2304f8SSagi Grimberg bool rd_enabled; 843f2304f8SSagi Grimberg 853f2304f8SSagi Grimberg bool hdr_digest; 863f2304f8SSagi Grimberg bool data_digest; 873f2304f8SSagi Grimberg struct ahash_request *rcv_hash; 883f2304f8SSagi Grimberg struct ahash_request *snd_hash; 893f2304f8SSagi Grimberg __le32 exp_ddgst; 903f2304f8SSagi Grimberg __le32 recv_ddgst; 913f2304f8SSagi Grimberg 923f2304f8SSagi Grimberg struct page_frag_cache pf_cache; 933f2304f8SSagi Grimberg 943f2304f8SSagi Grimberg void (*state_change)(struct sock *); 953f2304f8SSagi Grimberg void (*data_ready)(struct sock *); 963f2304f8SSagi Grimberg void (*write_space)(struct sock *); 973f2304f8SSagi Grimberg }; 983f2304f8SSagi Grimberg 993f2304f8SSagi Grimberg struct nvme_tcp_ctrl { 1003f2304f8SSagi Grimberg /* read only in the hot path */ 1013f2304f8SSagi Grimberg struct nvme_tcp_queue *queues; 1023f2304f8SSagi Grimberg struct blk_mq_tag_set tag_set; 1033f2304f8SSagi Grimberg 1043f2304f8SSagi Grimberg /* other member variables */ 1053f2304f8SSagi Grimberg struct list_head list; 1063f2304f8SSagi Grimberg struct blk_mq_tag_set admin_tag_set; 1073f2304f8SSagi Grimberg struct sockaddr_storage addr; 1083f2304f8SSagi Grimberg struct sockaddr_storage src_addr; 1093f2304f8SSagi Grimberg struct nvme_ctrl ctrl; 1103f2304f8SSagi Grimberg 1113f2304f8SSagi Grimberg struct work_struct err_work; 1123f2304f8SSagi Grimberg struct delayed_work connect_work; 1133f2304f8SSagi Grimberg struct nvme_tcp_request async_req; 11464861993SSagi Grimberg u32 io_queues[HCTX_MAX_TYPES]; 1153f2304f8SSagi Grimberg }; 1163f2304f8SSagi Grimberg 1173f2304f8SSagi Grimberg static LIST_HEAD(nvme_tcp_ctrl_list); 1183f2304f8SSagi Grimberg static DEFINE_MUTEX(nvme_tcp_ctrl_mutex); 1193f2304f8SSagi Grimberg static struct workqueue_struct *nvme_tcp_wq; 1203f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_mq_ops; 1213f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_admin_mq_ops; 1223f2304f8SSagi Grimberg 1233f2304f8SSagi Grimberg static inline struct nvme_tcp_ctrl *to_tcp_ctrl(struct nvme_ctrl *ctrl) 1243f2304f8SSagi Grimberg { 1253f2304f8SSagi Grimberg return container_of(ctrl, struct nvme_tcp_ctrl, ctrl); 1263f2304f8SSagi Grimberg } 1273f2304f8SSagi Grimberg 1283f2304f8SSagi Grimberg static inline int nvme_tcp_queue_id(struct nvme_tcp_queue *queue) 1293f2304f8SSagi Grimberg { 1303f2304f8SSagi Grimberg return queue - queue->ctrl->queues; 1313f2304f8SSagi Grimberg } 1323f2304f8SSagi Grimberg 1333f2304f8SSagi Grimberg static inline struct blk_mq_tags *nvme_tcp_tagset(struct nvme_tcp_queue *queue) 1343f2304f8SSagi Grimberg { 1353f2304f8SSagi Grimberg u32 queue_idx = nvme_tcp_queue_id(queue); 1363f2304f8SSagi Grimberg 1373f2304f8SSagi Grimberg if (queue_idx == 0) 1383f2304f8SSagi Grimberg return queue->ctrl->admin_tag_set.tags[queue_idx]; 1393f2304f8SSagi Grimberg return queue->ctrl->tag_set.tags[queue_idx - 1]; 1403f2304f8SSagi Grimberg } 1413f2304f8SSagi Grimberg 1423f2304f8SSagi Grimberg static inline u8 nvme_tcp_hdgst_len(struct nvme_tcp_queue *queue) 1433f2304f8SSagi Grimberg { 1443f2304f8SSagi Grimberg return queue->hdr_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1453f2304f8SSagi Grimberg } 1463f2304f8SSagi Grimberg 1473f2304f8SSagi Grimberg static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue) 1483f2304f8SSagi Grimberg { 1493f2304f8SSagi Grimberg return queue->data_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1503f2304f8SSagi Grimberg } 1513f2304f8SSagi Grimberg 1523f2304f8SSagi Grimberg static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_queue *queue) 1533f2304f8SSagi Grimberg { 1543f2304f8SSagi Grimberg return queue->cmnd_capsule_len - sizeof(struct nvme_command); 1553f2304f8SSagi Grimberg } 1563f2304f8SSagi Grimberg 1573f2304f8SSagi Grimberg static inline bool nvme_tcp_async_req(struct nvme_tcp_request *req) 1583f2304f8SSagi Grimberg { 1593f2304f8SSagi Grimberg return req == &req->queue->ctrl->async_req; 1603f2304f8SSagi Grimberg } 1613f2304f8SSagi Grimberg 1623f2304f8SSagi Grimberg static inline bool nvme_tcp_has_inline_data(struct nvme_tcp_request *req) 1633f2304f8SSagi Grimberg { 1643f2304f8SSagi Grimberg struct request *rq; 1653f2304f8SSagi Grimberg unsigned int bytes; 1663f2304f8SSagi Grimberg 1673f2304f8SSagi Grimberg if (unlikely(nvme_tcp_async_req(req))) 1683f2304f8SSagi Grimberg return false; /* async events don't have a request */ 1693f2304f8SSagi Grimberg 1703f2304f8SSagi Grimberg rq = blk_mq_rq_from_pdu(req); 1713f2304f8SSagi Grimberg bytes = blk_rq_payload_bytes(rq); 1723f2304f8SSagi Grimberg 1733f2304f8SSagi Grimberg return rq_data_dir(rq) == WRITE && bytes && 1743f2304f8SSagi Grimberg bytes <= nvme_tcp_inline_data_size(req->queue); 1753f2304f8SSagi Grimberg } 1763f2304f8SSagi Grimberg 1773f2304f8SSagi Grimberg static inline struct page *nvme_tcp_req_cur_page(struct nvme_tcp_request *req) 1783f2304f8SSagi Grimberg { 1793f2304f8SSagi Grimberg return req->iter.bvec->bv_page; 1803f2304f8SSagi Grimberg } 1813f2304f8SSagi Grimberg 1823f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_offset(struct nvme_tcp_request *req) 1833f2304f8SSagi Grimberg { 1843f2304f8SSagi Grimberg return req->iter.bvec->bv_offset + req->iter.iov_offset; 1853f2304f8SSagi Grimberg } 1863f2304f8SSagi Grimberg 1873f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_length(struct nvme_tcp_request *req) 1883f2304f8SSagi Grimberg { 1893f2304f8SSagi Grimberg return min_t(size_t, req->iter.bvec->bv_len - req->iter.iov_offset, 1903f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent); 1913f2304f8SSagi Grimberg } 1923f2304f8SSagi Grimberg 1933f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_offset(struct nvme_tcp_request *req) 1943f2304f8SSagi Grimberg { 1953f2304f8SSagi Grimberg return req->iter.iov_offset; 1963f2304f8SSagi Grimberg } 1973f2304f8SSagi Grimberg 1983f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_data_left(struct nvme_tcp_request *req) 1993f2304f8SSagi Grimberg { 2003f2304f8SSagi Grimberg return rq_data_dir(blk_mq_rq_from_pdu(req)) == WRITE ? 2013f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent : 0; 2023f2304f8SSagi Grimberg } 2033f2304f8SSagi Grimberg 2043f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_last_send(struct nvme_tcp_request *req, 2053f2304f8SSagi Grimberg int len) 2063f2304f8SSagi Grimberg { 2073f2304f8SSagi Grimberg return nvme_tcp_pdu_data_left(req) <= len; 2083f2304f8SSagi Grimberg } 2093f2304f8SSagi Grimberg 2103f2304f8SSagi Grimberg static void nvme_tcp_init_iter(struct nvme_tcp_request *req, 2113f2304f8SSagi Grimberg unsigned int dir) 2123f2304f8SSagi Grimberg { 2133f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 2143f2304f8SSagi Grimberg struct bio_vec *vec; 2153f2304f8SSagi Grimberg unsigned int size; 2163f2304f8SSagi Grimberg int nsegs; 2173f2304f8SSagi Grimberg size_t offset; 2183f2304f8SSagi Grimberg 2193f2304f8SSagi Grimberg if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) { 2203f2304f8SSagi Grimberg vec = &rq->special_vec; 2213f2304f8SSagi Grimberg nsegs = 1; 2223f2304f8SSagi Grimberg size = blk_rq_payload_bytes(rq); 2233f2304f8SSagi Grimberg offset = 0; 2243f2304f8SSagi Grimberg } else { 2253f2304f8SSagi Grimberg struct bio *bio = req->curr_bio; 2263f2304f8SSagi Grimberg 2273f2304f8SSagi Grimberg vec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); 2283f2304f8SSagi Grimberg nsegs = bio_segments(bio); 2293f2304f8SSagi Grimberg size = bio->bi_iter.bi_size; 2303f2304f8SSagi Grimberg offset = bio->bi_iter.bi_bvec_done; 2313f2304f8SSagi Grimberg } 2323f2304f8SSagi Grimberg 2333f2304f8SSagi Grimberg iov_iter_bvec(&req->iter, dir, vec, nsegs, size); 2343f2304f8SSagi Grimberg req->iter.iov_offset = offset; 2353f2304f8SSagi Grimberg } 2363f2304f8SSagi Grimberg 2373f2304f8SSagi Grimberg static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req, 2383f2304f8SSagi Grimberg int len) 2393f2304f8SSagi Grimberg { 2403f2304f8SSagi Grimberg req->data_sent += len; 2413f2304f8SSagi Grimberg req->pdu_sent += len; 2423f2304f8SSagi Grimberg iov_iter_advance(&req->iter, len); 2433f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter) && 2443f2304f8SSagi Grimberg req->data_sent < req->data_len) { 2453f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 2463f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 2473f2304f8SSagi Grimberg } 2483f2304f8SSagi Grimberg } 2493f2304f8SSagi Grimberg 2503f2304f8SSagi Grimberg static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req) 2513f2304f8SSagi Grimberg { 2523f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 2533f2304f8SSagi Grimberg 2543f2304f8SSagi Grimberg spin_lock(&queue->lock); 2553f2304f8SSagi Grimberg list_add_tail(&req->entry, &queue->send_list); 2563f2304f8SSagi Grimberg spin_unlock(&queue->lock); 2573f2304f8SSagi Grimberg 2583f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 2593f2304f8SSagi Grimberg } 2603f2304f8SSagi Grimberg 2613f2304f8SSagi Grimberg static inline struct nvme_tcp_request * 2623f2304f8SSagi Grimberg nvme_tcp_fetch_request(struct nvme_tcp_queue *queue) 2633f2304f8SSagi Grimberg { 2643f2304f8SSagi Grimberg struct nvme_tcp_request *req; 2653f2304f8SSagi Grimberg 2663f2304f8SSagi Grimberg spin_lock(&queue->lock); 2673f2304f8SSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 2683f2304f8SSagi Grimberg struct nvme_tcp_request, entry); 2693f2304f8SSagi Grimberg if (req) 2703f2304f8SSagi Grimberg list_del(&req->entry); 2713f2304f8SSagi Grimberg spin_unlock(&queue->lock); 2723f2304f8SSagi Grimberg 2733f2304f8SSagi Grimberg return req; 2743f2304f8SSagi Grimberg } 2753f2304f8SSagi Grimberg 276a7273d40SChristoph Hellwig static inline void nvme_tcp_ddgst_final(struct ahash_request *hash, 277a7273d40SChristoph Hellwig __le32 *dgst) 2783f2304f8SSagi Grimberg { 2793f2304f8SSagi Grimberg ahash_request_set_crypt(hash, NULL, (u8 *)dgst, 0); 2803f2304f8SSagi Grimberg crypto_ahash_final(hash); 2813f2304f8SSagi Grimberg } 2823f2304f8SSagi Grimberg 2833f2304f8SSagi Grimberg static inline void nvme_tcp_ddgst_update(struct ahash_request *hash, 2843f2304f8SSagi Grimberg struct page *page, off_t off, size_t len) 2853f2304f8SSagi Grimberg { 2863f2304f8SSagi Grimberg struct scatterlist sg; 2873f2304f8SSagi Grimberg 2883f2304f8SSagi Grimberg sg_init_marker(&sg, 1); 2893f2304f8SSagi Grimberg sg_set_page(&sg, page, len, off); 2903f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, NULL, len); 2913f2304f8SSagi Grimberg crypto_ahash_update(hash); 2923f2304f8SSagi Grimberg } 2933f2304f8SSagi Grimberg 2943f2304f8SSagi Grimberg static inline void nvme_tcp_hdgst(struct ahash_request *hash, 2953f2304f8SSagi Grimberg void *pdu, size_t len) 2963f2304f8SSagi Grimberg { 2973f2304f8SSagi Grimberg struct scatterlist sg; 2983f2304f8SSagi Grimberg 2993f2304f8SSagi Grimberg sg_init_one(&sg, pdu, len); 3003f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, pdu + len, len); 3013f2304f8SSagi Grimberg crypto_ahash_digest(hash); 3023f2304f8SSagi Grimberg } 3033f2304f8SSagi Grimberg 3043f2304f8SSagi Grimberg static int nvme_tcp_verify_hdgst(struct nvme_tcp_queue *queue, 3053f2304f8SSagi Grimberg void *pdu, size_t pdu_len) 3063f2304f8SSagi Grimberg { 3073f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3083f2304f8SSagi Grimberg __le32 recv_digest; 3093f2304f8SSagi Grimberg __le32 exp_digest; 3103f2304f8SSagi Grimberg 3113f2304f8SSagi Grimberg if (unlikely(!(hdr->flags & NVME_TCP_F_HDGST))) { 3123f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3133f2304f8SSagi Grimberg "queue %d: header digest flag is cleared\n", 3143f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3153f2304f8SSagi Grimberg return -EPROTO; 3163f2304f8SSagi Grimberg } 3173f2304f8SSagi Grimberg 3183f2304f8SSagi Grimberg recv_digest = *(__le32 *)(pdu + hdr->hlen); 3193f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->rcv_hash, pdu, pdu_len); 3203f2304f8SSagi Grimberg exp_digest = *(__le32 *)(pdu + hdr->hlen); 3213f2304f8SSagi Grimberg if (recv_digest != exp_digest) { 3223f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3233f2304f8SSagi Grimberg "header digest error: recv %#x expected %#x\n", 3243f2304f8SSagi Grimberg le32_to_cpu(recv_digest), le32_to_cpu(exp_digest)); 3253f2304f8SSagi Grimberg return -EIO; 3263f2304f8SSagi Grimberg } 3273f2304f8SSagi Grimberg 3283f2304f8SSagi Grimberg return 0; 3293f2304f8SSagi Grimberg } 3303f2304f8SSagi Grimberg 3313f2304f8SSagi Grimberg static int nvme_tcp_check_ddgst(struct nvme_tcp_queue *queue, void *pdu) 3323f2304f8SSagi Grimberg { 3333f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3343f2304f8SSagi Grimberg u8 digest_len = nvme_tcp_hdgst_len(queue); 3353f2304f8SSagi Grimberg u32 len; 3363f2304f8SSagi Grimberg 3373f2304f8SSagi Grimberg len = le32_to_cpu(hdr->plen) - hdr->hlen - 3383f2304f8SSagi Grimberg ((hdr->flags & NVME_TCP_F_HDGST) ? digest_len : 0); 3393f2304f8SSagi Grimberg 3403f2304f8SSagi Grimberg if (unlikely(len && !(hdr->flags & NVME_TCP_F_DDGST))) { 3413f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3423f2304f8SSagi Grimberg "queue %d: data digest flag is cleared\n", 3433f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3443f2304f8SSagi Grimberg return -EPROTO; 3453f2304f8SSagi Grimberg } 3463f2304f8SSagi Grimberg crypto_ahash_init(queue->rcv_hash); 3473f2304f8SSagi Grimberg 3483f2304f8SSagi Grimberg return 0; 3493f2304f8SSagi Grimberg } 3503f2304f8SSagi Grimberg 3513f2304f8SSagi Grimberg static void nvme_tcp_exit_request(struct blk_mq_tag_set *set, 3523f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx) 3533f2304f8SSagi Grimberg { 3543f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 3553f2304f8SSagi Grimberg 3563f2304f8SSagi Grimberg page_frag_free(req->pdu); 3573f2304f8SSagi Grimberg } 3583f2304f8SSagi Grimberg 3593f2304f8SSagi Grimberg static int nvme_tcp_init_request(struct blk_mq_tag_set *set, 3603f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx, 3613f2304f8SSagi Grimberg unsigned int numa_node) 3623f2304f8SSagi Grimberg { 3633f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 3643f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 3653f2304f8SSagi Grimberg int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 3663f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx]; 3673f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 3683f2304f8SSagi Grimberg 3693f2304f8SSagi Grimberg req->pdu = page_frag_alloc(&queue->pf_cache, 3703f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 3713f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 3723f2304f8SSagi Grimberg if (!req->pdu) 3733f2304f8SSagi Grimberg return -ENOMEM; 3743f2304f8SSagi Grimberg 3753f2304f8SSagi Grimberg req->queue = queue; 3763f2304f8SSagi Grimberg nvme_req(rq)->ctrl = &ctrl->ctrl; 3773f2304f8SSagi Grimberg 3783f2304f8SSagi Grimberg return 0; 3793f2304f8SSagi Grimberg } 3803f2304f8SSagi Grimberg 3813f2304f8SSagi Grimberg static int nvme_tcp_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 3823f2304f8SSagi Grimberg unsigned int hctx_idx) 3833f2304f8SSagi Grimberg { 3843f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 3853f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[hctx_idx + 1]; 3863f2304f8SSagi Grimberg 3873f2304f8SSagi Grimberg hctx->driver_data = queue; 3883f2304f8SSagi Grimberg return 0; 3893f2304f8SSagi Grimberg } 3903f2304f8SSagi Grimberg 3913f2304f8SSagi Grimberg static int nvme_tcp_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 3923f2304f8SSagi Grimberg unsigned int hctx_idx) 3933f2304f8SSagi Grimberg { 3943f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 3953f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 3963f2304f8SSagi Grimberg 3973f2304f8SSagi Grimberg hctx->driver_data = queue; 3983f2304f8SSagi Grimberg return 0; 3993f2304f8SSagi Grimberg } 4003f2304f8SSagi Grimberg 4013f2304f8SSagi Grimberg static enum nvme_tcp_recv_state 4023f2304f8SSagi Grimberg nvme_tcp_recv_state(struct nvme_tcp_queue *queue) 4033f2304f8SSagi Grimberg { 4043f2304f8SSagi Grimberg return (queue->pdu_remaining) ? NVME_TCP_RECV_PDU : 4053f2304f8SSagi Grimberg (queue->ddgst_remaining) ? NVME_TCP_RECV_DDGST : 4063f2304f8SSagi Grimberg NVME_TCP_RECV_DATA; 4073f2304f8SSagi Grimberg } 4083f2304f8SSagi Grimberg 4093f2304f8SSagi Grimberg static void nvme_tcp_init_recv_ctx(struct nvme_tcp_queue *queue) 4103f2304f8SSagi Grimberg { 4113f2304f8SSagi Grimberg queue->pdu_remaining = sizeof(struct nvme_tcp_rsp_pdu) + 4123f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 4133f2304f8SSagi Grimberg queue->pdu_offset = 0; 4143f2304f8SSagi Grimberg queue->data_remaining = -1; 4153f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 4163f2304f8SSagi Grimberg } 4173f2304f8SSagi Grimberg 4183f2304f8SSagi Grimberg static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl) 4193f2304f8SSagi Grimberg { 4203f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) 4213f2304f8SSagi Grimberg return; 4223f2304f8SSagi Grimberg 4233f2304f8SSagi Grimberg queue_work(nvme_wq, &to_tcp_ctrl(ctrl)->err_work); 4243f2304f8SSagi Grimberg } 4253f2304f8SSagi Grimberg 4263f2304f8SSagi Grimberg static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue, 4273f2304f8SSagi Grimberg struct nvme_completion *cqe) 4283f2304f8SSagi Grimberg { 4293f2304f8SSagi Grimberg struct request *rq; 4303f2304f8SSagi Grimberg 4313f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), cqe->command_id); 4323f2304f8SSagi Grimberg if (!rq) { 4333f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4343f2304f8SSagi Grimberg "queue %d tag 0x%x not found\n", 4353f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), cqe->command_id); 4363f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 4373f2304f8SSagi Grimberg return -EINVAL; 4383f2304f8SSagi Grimberg } 4393f2304f8SSagi Grimberg 4403f2304f8SSagi Grimberg nvme_end_request(rq, cqe->status, cqe->result); 4413f2304f8SSagi Grimberg 4423f2304f8SSagi Grimberg return 0; 4433f2304f8SSagi Grimberg } 4443f2304f8SSagi Grimberg 4453f2304f8SSagi Grimberg static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue, 4463f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu) 4473f2304f8SSagi Grimberg { 4483f2304f8SSagi Grimberg struct request *rq; 4493f2304f8SSagi Grimberg 4503f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 4513f2304f8SSagi Grimberg if (!rq) { 4523f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4533f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 4543f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 4553f2304f8SSagi Grimberg return -ENOENT; 4563f2304f8SSagi Grimberg } 4573f2304f8SSagi Grimberg 4583f2304f8SSagi Grimberg if (!blk_rq_payload_bytes(rq)) { 4593f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4603f2304f8SSagi Grimberg "queue %d tag %#x unexpected data\n", 4613f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 4623f2304f8SSagi Grimberg return -EIO; 4633f2304f8SSagi Grimberg } 4643f2304f8SSagi Grimberg 4653f2304f8SSagi Grimberg queue->data_remaining = le32_to_cpu(pdu->data_length); 4663f2304f8SSagi Grimberg 467602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS && 468602d674cSSagi Grimberg unlikely(!(pdu->hdr.flags & NVME_TCP_F_DATA_LAST))) { 469602d674cSSagi Grimberg dev_err(queue->ctrl->ctrl.device, 470602d674cSSagi Grimberg "queue %d tag %#x SUCCESS set but not last PDU\n", 471602d674cSSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 472602d674cSSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 473602d674cSSagi Grimberg return -EPROTO; 474602d674cSSagi Grimberg } 475602d674cSSagi Grimberg 4763f2304f8SSagi Grimberg return 0; 4773f2304f8SSagi Grimberg } 4783f2304f8SSagi Grimberg 4793f2304f8SSagi Grimberg static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue, 4803f2304f8SSagi Grimberg struct nvme_tcp_rsp_pdu *pdu) 4813f2304f8SSagi Grimberg { 4823f2304f8SSagi Grimberg struct nvme_completion *cqe = &pdu->cqe; 4833f2304f8SSagi Grimberg int ret = 0; 4843f2304f8SSagi Grimberg 4853f2304f8SSagi Grimberg /* 4863f2304f8SSagi Grimberg * AEN requests are special as they don't time out and can 4873f2304f8SSagi Grimberg * survive any kind of queue freeze and often don't respond to 4883f2304f8SSagi Grimberg * aborts. We don't even bother to allocate a struct request 4893f2304f8SSagi Grimberg * for them but rather special case them here. 4903f2304f8SSagi Grimberg */ 4913f2304f8SSagi Grimberg if (unlikely(nvme_tcp_queue_id(queue) == 0 && 4923f2304f8SSagi Grimberg cqe->command_id >= NVME_AQ_BLK_MQ_DEPTH)) 4933f2304f8SSagi Grimberg nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, 4943f2304f8SSagi Grimberg &cqe->result); 4953f2304f8SSagi Grimberg else 4963f2304f8SSagi Grimberg ret = nvme_tcp_process_nvme_cqe(queue, cqe); 4973f2304f8SSagi Grimberg 4983f2304f8SSagi Grimberg return ret; 4993f2304f8SSagi Grimberg } 5003f2304f8SSagi Grimberg 5013f2304f8SSagi Grimberg static int nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req, 5023f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5033f2304f8SSagi Grimberg { 5043f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *data = req->pdu; 5053f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 5063f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 5073f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 5083f2304f8SSagi Grimberg u8 ddgst = nvme_tcp_ddgst_len(queue); 5093f2304f8SSagi Grimberg 5103f2304f8SSagi Grimberg req->pdu_len = le32_to_cpu(pdu->r2t_length); 5113f2304f8SSagi Grimberg req->pdu_sent = 0; 5123f2304f8SSagi Grimberg 5133f2304f8SSagi Grimberg if (unlikely(req->data_sent + req->pdu_len > req->data_len)) { 5143f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5153f2304f8SSagi Grimberg "req %d r2t len %u exceeded data len %u (%zu sent)\n", 5163f2304f8SSagi Grimberg rq->tag, req->pdu_len, req->data_len, 5173f2304f8SSagi Grimberg req->data_sent); 5183f2304f8SSagi Grimberg return -EPROTO; 5193f2304f8SSagi Grimberg } 5203f2304f8SSagi Grimberg 5213f2304f8SSagi Grimberg if (unlikely(le32_to_cpu(pdu->r2t_offset) < req->data_sent)) { 5223f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5233f2304f8SSagi Grimberg "req %d unexpected r2t offset %u (expected %zu)\n", 5243f2304f8SSagi Grimberg rq->tag, le32_to_cpu(pdu->r2t_offset), 5253f2304f8SSagi Grimberg req->data_sent); 5263f2304f8SSagi Grimberg return -EPROTO; 5273f2304f8SSagi Grimberg } 5283f2304f8SSagi Grimberg 5293f2304f8SSagi Grimberg memset(data, 0, sizeof(*data)); 5303f2304f8SSagi Grimberg data->hdr.type = nvme_tcp_h2c_data; 5313f2304f8SSagi Grimberg data->hdr.flags = NVME_TCP_F_DATA_LAST; 5323f2304f8SSagi Grimberg if (queue->hdr_digest) 5333f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_HDGST; 5343f2304f8SSagi Grimberg if (queue->data_digest) 5353f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_DDGST; 5363f2304f8SSagi Grimberg data->hdr.hlen = sizeof(*data); 5373f2304f8SSagi Grimberg data->hdr.pdo = data->hdr.hlen + hdgst; 5383f2304f8SSagi Grimberg data->hdr.plen = 5393f2304f8SSagi Grimberg cpu_to_le32(data->hdr.hlen + hdgst + req->pdu_len + ddgst); 5403f2304f8SSagi Grimberg data->ttag = pdu->ttag; 5413f2304f8SSagi Grimberg data->command_id = rq->tag; 5423f2304f8SSagi Grimberg data->data_offset = cpu_to_le32(req->data_sent); 5433f2304f8SSagi Grimberg data->data_length = cpu_to_le32(req->pdu_len); 5443f2304f8SSagi Grimberg return 0; 5453f2304f8SSagi Grimberg } 5463f2304f8SSagi Grimberg 5473f2304f8SSagi Grimberg static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue, 5483f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5493f2304f8SSagi Grimberg { 5503f2304f8SSagi Grimberg struct nvme_tcp_request *req; 5513f2304f8SSagi Grimberg struct request *rq; 5523f2304f8SSagi Grimberg int ret; 5533f2304f8SSagi Grimberg 5543f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 5553f2304f8SSagi Grimberg if (!rq) { 5563f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5573f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 5583f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 5593f2304f8SSagi Grimberg return -ENOENT; 5603f2304f8SSagi Grimberg } 5613f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 5623f2304f8SSagi Grimberg 5633f2304f8SSagi Grimberg ret = nvme_tcp_setup_h2c_data_pdu(req, pdu); 5643f2304f8SSagi Grimberg if (unlikely(ret)) 5653f2304f8SSagi Grimberg return ret; 5663f2304f8SSagi Grimberg 5673f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_H2C_PDU; 5683f2304f8SSagi Grimberg req->offset = 0; 5693f2304f8SSagi Grimberg 5703f2304f8SSagi Grimberg nvme_tcp_queue_request(req); 5713f2304f8SSagi Grimberg 5723f2304f8SSagi Grimberg return 0; 5733f2304f8SSagi Grimberg } 5743f2304f8SSagi Grimberg 5753f2304f8SSagi Grimberg static int nvme_tcp_recv_pdu(struct nvme_tcp_queue *queue, struct sk_buff *skb, 5763f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 5773f2304f8SSagi Grimberg { 5783f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr; 5793f2304f8SSagi Grimberg char *pdu = queue->pdu; 5803f2304f8SSagi Grimberg size_t rcv_len = min_t(size_t, *len, queue->pdu_remaining); 5813f2304f8SSagi Grimberg int ret; 5823f2304f8SSagi Grimberg 5833f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, 5843f2304f8SSagi Grimberg &pdu[queue->pdu_offset], rcv_len); 5853f2304f8SSagi Grimberg if (unlikely(ret)) 5863f2304f8SSagi Grimberg return ret; 5873f2304f8SSagi Grimberg 5883f2304f8SSagi Grimberg queue->pdu_remaining -= rcv_len; 5893f2304f8SSagi Grimberg queue->pdu_offset += rcv_len; 5903f2304f8SSagi Grimberg *offset += rcv_len; 5913f2304f8SSagi Grimberg *len -= rcv_len; 5923f2304f8SSagi Grimberg if (queue->pdu_remaining) 5933f2304f8SSagi Grimberg return 0; 5943f2304f8SSagi Grimberg 5953f2304f8SSagi Grimberg hdr = queue->pdu; 5963f2304f8SSagi Grimberg if (queue->hdr_digest) { 5973f2304f8SSagi Grimberg ret = nvme_tcp_verify_hdgst(queue, queue->pdu, hdr->hlen); 5983f2304f8SSagi Grimberg if (unlikely(ret)) 5993f2304f8SSagi Grimberg return ret; 6003f2304f8SSagi Grimberg } 6013f2304f8SSagi Grimberg 6023f2304f8SSagi Grimberg 6033f2304f8SSagi Grimberg if (queue->data_digest) { 6043f2304f8SSagi Grimberg ret = nvme_tcp_check_ddgst(queue, queue->pdu); 6053f2304f8SSagi Grimberg if (unlikely(ret)) 6063f2304f8SSagi Grimberg return ret; 6073f2304f8SSagi Grimberg } 6083f2304f8SSagi Grimberg 6093f2304f8SSagi Grimberg switch (hdr->type) { 6103f2304f8SSagi Grimberg case nvme_tcp_c2h_data: 6116be18260SSagi Grimberg return nvme_tcp_handle_c2h_data(queue, (void *)queue->pdu); 6123f2304f8SSagi Grimberg case nvme_tcp_rsp: 6133f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6146be18260SSagi Grimberg return nvme_tcp_handle_comp(queue, (void *)queue->pdu); 6153f2304f8SSagi Grimberg case nvme_tcp_r2t: 6163f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6176be18260SSagi Grimberg return nvme_tcp_handle_r2t(queue, (void *)queue->pdu); 6183f2304f8SSagi Grimberg default: 6193f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6203f2304f8SSagi Grimberg "unsupported pdu type (%d)\n", hdr->type); 6213f2304f8SSagi Grimberg return -EINVAL; 6223f2304f8SSagi Grimberg } 6233f2304f8SSagi Grimberg } 6243f2304f8SSagi Grimberg 625988aef9eSChristoph Hellwig static inline void nvme_tcp_end_request(struct request *rq, u16 status) 626602d674cSSagi Grimberg { 627602d674cSSagi Grimberg union nvme_result res = {}; 628602d674cSSagi Grimberg 629602d674cSSagi Grimberg nvme_end_request(rq, cpu_to_le16(status << 1), res); 630602d674cSSagi Grimberg } 631602d674cSSagi Grimberg 6323f2304f8SSagi Grimberg static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6333f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6343f2304f8SSagi Grimberg { 6353f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 6363f2304f8SSagi Grimberg struct nvme_tcp_request *req; 6373f2304f8SSagi Grimberg struct request *rq; 6383f2304f8SSagi Grimberg 6393f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 6403f2304f8SSagi Grimberg if (!rq) { 6413f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6423f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 6433f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 6443f2304f8SSagi Grimberg return -ENOENT; 6453f2304f8SSagi Grimberg } 6463f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 6473f2304f8SSagi Grimberg 6483f2304f8SSagi Grimberg while (true) { 6493f2304f8SSagi Grimberg int recv_len, ret; 6503f2304f8SSagi Grimberg 6513f2304f8SSagi Grimberg recv_len = min_t(size_t, *len, queue->data_remaining); 6523f2304f8SSagi Grimberg if (!recv_len) 6533f2304f8SSagi Grimberg break; 6543f2304f8SSagi Grimberg 6553f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter)) { 6563f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 6573f2304f8SSagi Grimberg 6583f2304f8SSagi Grimberg /* 6593f2304f8SSagi Grimberg * If we don`t have any bios it means that controller 6603f2304f8SSagi Grimberg * sent more data than we requested, hence error 6613f2304f8SSagi Grimberg */ 6623f2304f8SSagi Grimberg if (!req->curr_bio) { 6633f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6643f2304f8SSagi Grimberg "queue %d no space in request %#x", 6653f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 6663f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6673f2304f8SSagi Grimberg return -EIO; 6683f2304f8SSagi Grimberg } 6693f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 6703f2304f8SSagi Grimberg } 6713f2304f8SSagi Grimberg 6723f2304f8SSagi Grimberg /* we can read only from what is left in this bio */ 6733f2304f8SSagi Grimberg recv_len = min_t(size_t, recv_len, 6743f2304f8SSagi Grimberg iov_iter_count(&req->iter)); 6753f2304f8SSagi Grimberg 6763f2304f8SSagi Grimberg if (queue->data_digest) 6773f2304f8SSagi Grimberg ret = skb_copy_and_hash_datagram_iter(skb, *offset, 6783f2304f8SSagi Grimberg &req->iter, recv_len, queue->rcv_hash); 6793f2304f8SSagi Grimberg else 6803f2304f8SSagi Grimberg ret = skb_copy_datagram_iter(skb, *offset, 6813f2304f8SSagi Grimberg &req->iter, recv_len); 6823f2304f8SSagi Grimberg if (ret) { 6833f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6843f2304f8SSagi Grimberg "queue %d failed to copy request %#x data", 6853f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 6863f2304f8SSagi Grimberg return ret; 6873f2304f8SSagi Grimberg } 6883f2304f8SSagi Grimberg 6893f2304f8SSagi Grimberg *len -= recv_len; 6903f2304f8SSagi Grimberg *offset += recv_len; 6913f2304f8SSagi Grimberg queue->data_remaining -= recv_len; 6923f2304f8SSagi Grimberg } 6933f2304f8SSagi Grimberg 6943f2304f8SSagi Grimberg if (!queue->data_remaining) { 6953f2304f8SSagi Grimberg if (queue->data_digest) { 6963f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst); 6973f2304f8SSagi Grimberg queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH; 6983f2304f8SSagi Grimberg } else { 699602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) 700602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7013f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7023f2304f8SSagi Grimberg } 7033f2304f8SSagi Grimberg } 7043f2304f8SSagi Grimberg 7053f2304f8SSagi Grimberg return 0; 7063f2304f8SSagi Grimberg } 7073f2304f8SSagi Grimberg 7083f2304f8SSagi Grimberg static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue, 7093f2304f8SSagi Grimberg struct sk_buff *skb, unsigned int *offset, size_t *len) 7103f2304f8SSagi Grimberg { 711602d674cSSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 7123f2304f8SSagi Grimberg char *ddgst = (char *)&queue->recv_ddgst; 7133f2304f8SSagi Grimberg size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining); 7143f2304f8SSagi Grimberg off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining; 7153f2304f8SSagi Grimberg int ret; 7163f2304f8SSagi Grimberg 7173f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, &ddgst[off], recv_len); 7183f2304f8SSagi Grimberg if (unlikely(ret)) 7193f2304f8SSagi Grimberg return ret; 7203f2304f8SSagi Grimberg 7213f2304f8SSagi Grimberg queue->ddgst_remaining -= recv_len; 7223f2304f8SSagi Grimberg *offset += recv_len; 7233f2304f8SSagi Grimberg *len -= recv_len; 7243f2304f8SSagi Grimberg if (queue->ddgst_remaining) 7253f2304f8SSagi Grimberg return 0; 7263f2304f8SSagi Grimberg 7273f2304f8SSagi Grimberg if (queue->recv_ddgst != queue->exp_ddgst) { 7283f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7293f2304f8SSagi Grimberg "data digest error: recv %#x expected %#x\n", 7303f2304f8SSagi Grimberg le32_to_cpu(queue->recv_ddgst), 7313f2304f8SSagi Grimberg le32_to_cpu(queue->exp_ddgst)); 7323f2304f8SSagi Grimberg return -EIO; 7333f2304f8SSagi Grimberg } 7343f2304f8SSagi Grimberg 735602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 736602d674cSSagi Grimberg struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), 737602d674cSSagi Grimberg pdu->command_id); 738602d674cSSagi Grimberg 739602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 740602d674cSSagi Grimberg } 741602d674cSSagi Grimberg 7423f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7433f2304f8SSagi Grimberg return 0; 7443f2304f8SSagi Grimberg } 7453f2304f8SSagi Grimberg 7463f2304f8SSagi Grimberg static int nvme_tcp_recv_skb(read_descriptor_t *desc, struct sk_buff *skb, 7473f2304f8SSagi Grimberg unsigned int offset, size_t len) 7483f2304f8SSagi Grimberg { 7493f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = desc->arg.data; 7503f2304f8SSagi Grimberg size_t consumed = len; 7513f2304f8SSagi Grimberg int result; 7523f2304f8SSagi Grimberg 7533f2304f8SSagi Grimberg while (len) { 7543f2304f8SSagi Grimberg switch (nvme_tcp_recv_state(queue)) { 7553f2304f8SSagi Grimberg case NVME_TCP_RECV_PDU: 7563f2304f8SSagi Grimberg result = nvme_tcp_recv_pdu(queue, skb, &offset, &len); 7573f2304f8SSagi Grimberg break; 7583f2304f8SSagi Grimberg case NVME_TCP_RECV_DATA: 7593f2304f8SSagi Grimberg result = nvme_tcp_recv_data(queue, skb, &offset, &len); 7603f2304f8SSagi Grimberg break; 7613f2304f8SSagi Grimberg case NVME_TCP_RECV_DDGST: 7623f2304f8SSagi Grimberg result = nvme_tcp_recv_ddgst(queue, skb, &offset, &len); 7633f2304f8SSagi Grimberg break; 7643f2304f8SSagi Grimberg default: 7653f2304f8SSagi Grimberg result = -EFAULT; 7663f2304f8SSagi Grimberg } 7673f2304f8SSagi Grimberg if (result) { 7683f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7693f2304f8SSagi Grimberg "receive failed: %d\n", result); 7703f2304f8SSagi Grimberg queue->rd_enabled = false; 7713f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 7723f2304f8SSagi Grimberg return result; 7733f2304f8SSagi Grimberg } 7743f2304f8SSagi Grimberg } 7753f2304f8SSagi Grimberg 7763f2304f8SSagi Grimberg return consumed; 7773f2304f8SSagi Grimberg } 7783f2304f8SSagi Grimberg 7793f2304f8SSagi Grimberg static void nvme_tcp_data_ready(struct sock *sk) 7803f2304f8SSagi Grimberg { 7813f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 7823f2304f8SSagi Grimberg 7833f2304f8SSagi Grimberg read_lock(&sk->sk_callback_lock); 7843f2304f8SSagi Grimberg queue = sk->sk_user_data; 7853f2304f8SSagi Grimberg if (likely(queue && queue->rd_enabled)) 7863f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 7873f2304f8SSagi Grimberg read_unlock(&sk->sk_callback_lock); 7883f2304f8SSagi Grimberg } 7893f2304f8SSagi Grimberg 7903f2304f8SSagi Grimberg static void nvme_tcp_write_space(struct sock *sk) 7913f2304f8SSagi Grimberg { 7923f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 7933f2304f8SSagi Grimberg 7943f2304f8SSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 7953f2304f8SSagi Grimberg queue = sk->sk_user_data; 7963f2304f8SSagi Grimberg if (likely(queue && sk_stream_is_writeable(sk))) { 7973f2304f8SSagi Grimberg clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); 7983f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 7993f2304f8SSagi Grimberg } 8003f2304f8SSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8013f2304f8SSagi Grimberg } 8023f2304f8SSagi Grimberg 8033f2304f8SSagi Grimberg static void nvme_tcp_state_change(struct sock *sk) 8043f2304f8SSagi Grimberg { 8053f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8063f2304f8SSagi Grimberg 8073f2304f8SSagi Grimberg read_lock(&sk->sk_callback_lock); 8083f2304f8SSagi Grimberg queue = sk->sk_user_data; 8093f2304f8SSagi Grimberg if (!queue) 8103f2304f8SSagi Grimberg goto done; 8113f2304f8SSagi Grimberg 8123f2304f8SSagi Grimberg switch (sk->sk_state) { 8133f2304f8SSagi Grimberg case TCP_CLOSE: 8143f2304f8SSagi Grimberg case TCP_CLOSE_WAIT: 8153f2304f8SSagi Grimberg case TCP_LAST_ACK: 8163f2304f8SSagi Grimberg case TCP_FIN_WAIT1: 8173f2304f8SSagi Grimberg case TCP_FIN_WAIT2: 8183f2304f8SSagi Grimberg /* fallthrough */ 8193f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8203f2304f8SSagi Grimberg break; 8213f2304f8SSagi Grimberg default: 8223f2304f8SSagi Grimberg dev_info(queue->ctrl->ctrl.device, 8233f2304f8SSagi Grimberg "queue %d socket state %d\n", 8243f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), sk->sk_state); 8253f2304f8SSagi Grimberg } 8263f2304f8SSagi Grimberg 8273f2304f8SSagi Grimberg queue->state_change(sk); 8283f2304f8SSagi Grimberg done: 8293f2304f8SSagi Grimberg read_unlock(&sk->sk_callback_lock); 8303f2304f8SSagi Grimberg } 8313f2304f8SSagi Grimberg 8323f2304f8SSagi Grimberg static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue) 8333f2304f8SSagi Grimberg { 8343f2304f8SSagi Grimberg queue->request = NULL; 8353f2304f8SSagi Grimberg } 8363f2304f8SSagi Grimberg 8373f2304f8SSagi Grimberg static void nvme_tcp_fail_request(struct nvme_tcp_request *req) 8383f2304f8SSagi Grimberg { 839602d674cSSagi Grimberg nvme_tcp_end_request(blk_mq_rq_from_pdu(req), NVME_SC_DATA_XFER_ERROR); 8403f2304f8SSagi Grimberg } 8413f2304f8SSagi Grimberg 8423f2304f8SSagi Grimberg static int nvme_tcp_try_send_data(struct nvme_tcp_request *req) 8433f2304f8SSagi Grimberg { 8443f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 8453f2304f8SSagi Grimberg 8463f2304f8SSagi Grimberg while (true) { 8473f2304f8SSagi Grimberg struct page *page = nvme_tcp_req_cur_page(req); 8483f2304f8SSagi Grimberg size_t offset = nvme_tcp_req_cur_offset(req); 8493f2304f8SSagi Grimberg size_t len = nvme_tcp_req_cur_length(req); 8503f2304f8SSagi Grimberg bool last = nvme_tcp_pdu_last_send(req, len); 8513f2304f8SSagi Grimberg int ret, flags = MSG_DONTWAIT; 8523f2304f8SSagi Grimberg 8533f2304f8SSagi Grimberg if (last && !queue->data_digest) 8543f2304f8SSagi Grimberg flags |= MSG_EOR; 8553f2304f8SSagi Grimberg else 8563f2304f8SSagi Grimberg flags |= MSG_MORE; 8573f2304f8SSagi Grimberg 85837c15219SMikhail Skorzhinskii /* can't zcopy slab pages */ 85937c15219SMikhail Skorzhinskii if (unlikely(PageSlab(page))) { 86037c15219SMikhail Skorzhinskii ret = sock_no_sendpage(queue->sock, page, offset, len, 86137c15219SMikhail Skorzhinskii flags); 86237c15219SMikhail Skorzhinskii } else { 86337c15219SMikhail Skorzhinskii ret = kernel_sendpage(queue->sock, page, offset, len, 86437c15219SMikhail Skorzhinskii flags); 86537c15219SMikhail Skorzhinskii } 8663f2304f8SSagi Grimberg if (ret <= 0) 8673f2304f8SSagi Grimberg return ret; 8683f2304f8SSagi Grimberg 8693f2304f8SSagi Grimberg nvme_tcp_advance_req(req, ret); 8703f2304f8SSagi Grimberg if (queue->data_digest) 8713f2304f8SSagi Grimberg nvme_tcp_ddgst_update(queue->snd_hash, page, 8723f2304f8SSagi Grimberg offset, ret); 8733f2304f8SSagi Grimberg 8743f2304f8SSagi Grimberg /* fully successful last write*/ 8753f2304f8SSagi Grimberg if (last && ret == len) { 8763f2304f8SSagi Grimberg if (queue->data_digest) { 8773f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->snd_hash, 8783f2304f8SSagi Grimberg &req->ddgst); 8793f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DDGST; 8803f2304f8SSagi Grimberg req->offset = 0; 8813f2304f8SSagi Grimberg } else { 8823f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 8833f2304f8SSagi Grimberg } 8843f2304f8SSagi Grimberg return 1; 8853f2304f8SSagi Grimberg } 8863f2304f8SSagi Grimberg } 8873f2304f8SSagi Grimberg return -EAGAIN; 8883f2304f8SSagi Grimberg } 8893f2304f8SSagi Grimberg 8903f2304f8SSagi Grimberg static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) 8913f2304f8SSagi Grimberg { 8923f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 8933f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 8943f2304f8SSagi Grimberg bool inline_data = nvme_tcp_has_inline_data(req); 8953f2304f8SSagi Grimberg int flags = MSG_DONTWAIT | (inline_data ? MSG_MORE : MSG_EOR); 8963f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 8973f2304f8SSagi Grimberg int len = sizeof(*pdu) + hdgst - req->offset; 8983f2304f8SSagi Grimberg int ret; 8993f2304f8SSagi Grimberg 9003f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9013f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9023f2304f8SSagi Grimberg 9033f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9043f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, flags); 9053f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9063f2304f8SSagi Grimberg return ret; 9073f2304f8SSagi Grimberg 9083f2304f8SSagi Grimberg len -= ret; 9093f2304f8SSagi Grimberg if (!len) { 9103f2304f8SSagi Grimberg if (inline_data) { 9113f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9123f2304f8SSagi Grimberg if (queue->data_digest) 9133f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9143f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 9153f2304f8SSagi Grimberg } else { 9163f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9173f2304f8SSagi Grimberg } 9183f2304f8SSagi Grimberg return 1; 9193f2304f8SSagi Grimberg } 9203f2304f8SSagi Grimberg req->offset += ret; 9213f2304f8SSagi Grimberg 9223f2304f8SSagi Grimberg return -EAGAIN; 9233f2304f8SSagi Grimberg } 9243f2304f8SSagi Grimberg 9253f2304f8SSagi Grimberg static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req) 9263f2304f8SSagi Grimberg { 9273f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9283f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = req->pdu; 9293f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9303f2304f8SSagi Grimberg int len = sizeof(*pdu) - req->offset + hdgst; 9313f2304f8SSagi Grimberg int ret; 9323f2304f8SSagi Grimberg 9333f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9343f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9353f2304f8SSagi Grimberg 9363f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9373f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, 9383f2304f8SSagi Grimberg MSG_DONTWAIT | MSG_MORE); 9393f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9403f2304f8SSagi Grimberg return ret; 9413f2304f8SSagi Grimberg 9423f2304f8SSagi Grimberg len -= ret; 9433f2304f8SSagi Grimberg if (!len) { 9443f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9453f2304f8SSagi Grimberg if (queue->data_digest) 9463f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9473f2304f8SSagi Grimberg if (!req->data_sent) 9483f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 9493f2304f8SSagi Grimberg return 1; 9503f2304f8SSagi Grimberg } 9513f2304f8SSagi Grimberg req->offset += ret; 9523f2304f8SSagi Grimberg 9533f2304f8SSagi Grimberg return -EAGAIN; 9543f2304f8SSagi Grimberg } 9553f2304f8SSagi Grimberg 9563f2304f8SSagi Grimberg static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req) 9573f2304f8SSagi Grimberg { 9583f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9593f2304f8SSagi Grimberg int ret; 9603f2304f8SSagi Grimberg struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_EOR }; 9613f2304f8SSagi Grimberg struct kvec iov = { 9623f2304f8SSagi Grimberg .iov_base = &req->ddgst + req->offset, 9633f2304f8SSagi Grimberg .iov_len = NVME_TCP_DIGEST_LENGTH - req->offset 9643f2304f8SSagi Grimberg }; 9653f2304f8SSagi Grimberg 9663f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 9673f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9683f2304f8SSagi Grimberg return ret; 9693f2304f8SSagi Grimberg 9703f2304f8SSagi Grimberg if (req->offset + ret == NVME_TCP_DIGEST_LENGTH) { 9713f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9723f2304f8SSagi Grimberg return 1; 9733f2304f8SSagi Grimberg } 9743f2304f8SSagi Grimberg 9753f2304f8SSagi Grimberg req->offset += ret; 9763f2304f8SSagi Grimberg return -EAGAIN; 9773f2304f8SSagi Grimberg } 9783f2304f8SSagi Grimberg 9793f2304f8SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue) 9803f2304f8SSagi Grimberg { 9813f2304f8SSagi Grimberg struct nvme_tcp_request *req; 9823f2304f8SSagi Grimberg int ret = 1; 9833f2304f8SSagi Grimberg 9843f2304f8SSagi Grimberg if (!queue->request) { 9853f2304f8SSagi Grimberg queue->request = nvme_tcp_fetch_request(queue); 9863f2304f8SSagi Grimberg if (!queue->request) 9873f2304f8SSagi Grimberg return 0; 9883f2304f8SSagi Grimberg } 9893f2304f8SSagi Grimberg req = queue->request; 9903f2304f8SSagi Grimberg 9913f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_CMD_PDU) { 9923f2304f8SSagi Grimberg ret = nvme_tcp_try_send_cmd_pdu(req); 9933f2304f8SSagi Grimberg if (ret <= 0) 9943f2304f8SSagi Grimberg goto done; 9953f2304f8SSagi Grimberg if (!nvme_tcp_has_inline_data(req)) 9963f2304f8SSagi Grimberg return ret; 9973f2304f8SSagi Grimberg } 9983f2304f8SSagi Grimberg 9993f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_H2C_PDU) { 10003f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data_pdu(req); 10013f2304f8SSagi Grimberg if (ret <= 0) 10023f2304f8SSagi Grimberg goto done; 10033f2304f8SSagi Grimberg } 10043f2304f8SSagi Grimberg 10053f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DATA) { 10063f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data(req); 10073f2304f8SSagi Grimberg if (ret <= 0) 10083f2304f8SSagi Grimberg goto done; 10093f2304f8SSagi Grimberg } 10103f2304f8SSagi Grimberg 10113f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DDGST) 10123f2304f8SSagi Grimberg ret = nvme_tcp_try_send_ddgst(req); 10133f2304f8SSagi Grimberg done: 10143f2304f8SSagi Grimberg if (ret == -EAGAIN) 10153f2304f8SSagi Grimberg ret = 0; 10163f2304f8SSagi Grimberg return ret; 10173f2304f8SSagi Grimberg } 10183f2304f8SSagi Grimberg 10193f2304f8SSagi Grimberg static int nvme_tcp_try_recv(struct nvme_tcp_queue *queue) 10203f2304f8SSagi Grimberg { 10213f2304f8SSagi Grimberg struct sock *sk = queue->sock->sk; 10223f2304f8SSagi Grimberg read_descriptor_t rd_desc; 10233f2304f8SSagi Grimberg int consumed; 10243f2304f8SSagi Grimberg 10253f2304f8SSagi Grimberg rd_desc.arg.data = queue; 10263f2304f8SSagi Grimberg rd_desc.count = 1; 10273f2304f8SSagi Grimberg lock_sock(sk); 10283f2304f8SSagi Grimberg consumed = tcp_read_sock(sk, &rd_desc, nvme_tcp_recv_skb); 10293f2304f8SSagi Grimberg release_sock(sk); 10303f2304f8SSagi Grimberg return consumed; 10313f2304f8SSagi Grimberg } 10323f2304f8SSagi Grimberg 10333f2304f8SSagi Grimberg static void nvme_tcp_io_work(struct work_struct *w) 10343f2304f8SSagi Grimberg { 10353f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = 10363f2304f8SSagi Grimberg container_of(w, struct nvme_tcp_queue, io_work); 10373f2304f8SSagi Grimberg unsigned long start = jiffies + msecs_to_jiffies(1); 10383f2304f8SSagi Grimberg 10393f2304f8SSagi Grimberg do { 10403f2304f8SSagi Grimberg bool pending = false; 10413f2304f8SSagi Grimberg int result; 10423f2304f8SSagi Grimberg 10433f2304f8SSagi Grimberg result = nvme_tcp_try_send(queue); 10443f2304f8SSagi Grimberg if (result > 0) { 10453f2304f8SSagi Grimberg pending = true; 10463f2304f8SSagi Grimberg } else if (unlikely(result < 0)) { 10473f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 10483f2304f8SSagi Grimberg "failed to send request %d\n", result); 10493f2304f8SSagi Grimberg if (result != -EPIPE) 10503f2304f8SSagi Grimberg nvme_tcp_fail_request(queue->request); 10513f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 10523f2304f8SSagi Grimberg return; 10533f2304f8SSagi Grimberg } 10543f2304f8SSagi Grimberg 10553f2304f8SSagi Grimberg result = nvme_tcp_try_recv(queue); 10563f2304f8SSagi Grimberg if (result > 0) 10573f2304f8SSagi Grimberg pending = true; 10583f2304f8SSagi Grimberg 10593f2304f8SSagi Grimberg if (!pending) 10603f2304f8SSagi Grimberg return; 10613f2304f8SSagi Grimberg 10623f2304f8SSagi Grimberg } while (time_after(jiffies, start)); /* quota is exhausted */ 10633f2304f8SSagi Grimberg 10643f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 10653f2304f8SSagi Grimberg } 10663f2304f8SSagi Grimberg 10673f2304f8SSagi Grimberg static void nvme_tcp_free_crypto(struct nvme_tcp_queue *queue) 10683f2304f8SSagi Grimberg { 10693f2304f8SSagi Grimberg struct crypto_ahash *tfm = crypto_ahash_reqtfm(queue->rcv_hash); 10703f2304f8SSagi Grimberg 10713f2304f8SSagi Grimberg ahash_request_free(queue->rcv_hash); 10723f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 10733f2304f8SSagi Grimberg crypto_free_ahash(tfm); 10743f2304f8SSagi Grimberg } 10753f2304f8SSagi Grimberg 10763f2304f8SSagi Grimberg static int nvme_tcp_alloc_crypto(struct nvme_tcp_queue *queue) 10773f2304f8SSagi Grimberg { 10783f2304f8SSagi Grimberg struct crypto_ahash *tfm; 10793f2304f8SSagi Grimberg 10803f2304f8SSagi Grimberg tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 10813f2304f8SSagi Grimberg if (IS_ERR(tfm)) 10823f2304f8SSagi Grimberg return PTR_ERR(tfm); 10833f2304f8SSagi Grimberg 10843f2304f8SSagi Grimberg queue->snd_hash = ahash_request_alloc(tfm, GFP_KERNEL); 10853f2304f8SSagi Grimberg if (!queue->snd_hash) 10863f2304f8SSagi Grimberg goto free_tfm; 10873f2304f8SSagi Grimberg ahash_request_set_callback(queue->snd_hash, 0, NULL, NULL); 10883f2304f8SSagi Grimberg 10893f2304f8SSagi Grimberg queue->rcv_hash = ahash_request_alloc(tfm, GFP_KERNEL); 10903f2304f8SSagi Grimberg if (!queue->rcv_hash) 10913f2304f8SSagi Grimberg goto free_snd_hash; 10923f2304f8SSagi Grimberg ahash_request_set_callback(queue->rcv_hash, 0, NULL, NULL); 10933f2304f8SSagi Grimberg 10943f2304f8SSagi Grimberg return 0; 10953f2304f8SSagi Grimberg free_snd_hash: 10963f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 10973f2304f8SSagi Grimberg free_tfm: 10983f2304f8SSagi Grimberg crypto_free_ahash(tfm); 10993f2304f8SSagi Grimberg return -ENOMEM; 11003f2304f8SSagi Grimberg } 11013f2304f8SSagi Grimberg 11023f2304f8SSagi Grimberg static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl) 11033f2304f8SSagi Grimberg { 11043f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11053f2304f8SSagi Grimberg 11063f2304f8SSagi Grimberg page_frag_free(async->pdu); 11073f2304f8SSagi Grimberg } 11083f2304f8SSagi Grimberg 11093f2304f8SSagi Grimberg static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) 11103f2304f8SSagi Grimberg { 11113f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 11123f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11133f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 11143f2304f8SSagi Grimberg 11153f2304f8SSagi Grimberg async->pdu = page_frag_alloc(&queue->pf_cache, 11163f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 11173f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 11183f2304f8SSagi Grimberg if (!async->pdu) 11193f2304f8SSagi Grimberg return -ENOMEM; 11203f2304f8SSagi Grimberg 11213f2304f8SSagi Grimberg async->queue = &ctrl->queues[0]; 11223f2304f8SSagi Grimberg return 0; 11233f2304f8SSagi Grimberg } 11243f2304f8SSagi Grimberg 11253f2304f8SSagi Grimberg static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid) 11263f2304f8SSagi Grimberg { 11273f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 11283f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 11293f2304f8SSagi Grimberg 11303f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_ALLOCATED, &queue->flags)) 11313f2304f8SSagi Grimberg return; 11323f2304f8SSagi Grimberg 11333f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 11343f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 11353f2304f8SSagi Grimberg 11363f2304f8SSagi Grimberg sock_release(queue->sock); 11373f2304f8SSagi Grimberg kfree(queue->pdu); 11383f2304f8SSagi Grimberg } 11393f2304f8SSagi Grimberg 11403f2304f8SSagi Grimberg static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) 11413f2304f8SSagi Grimberg { 11423f2304f8SSagi Grimberg struct nvme_tcp_icreq_pdu *icreq; 11433f2304f8SSagi Grimberg struct nvme_tcp_icresp_pdu *icresp; 11443f2304f8SSagi Grimberg struct msghdr msg = {}; 11453f2304f8SSagi Grimberg struct kvec iov; 11463f2304f8SSagi Grimberg bool ctrl_hdgst, ctrl_ddgst; 11473f2304f8SSagi Grimberg int ret; 11483f2304f8SSagi Grimberg 11493f2304f8SSagi Grimberg icreq = kzalloc(sizeof(*icreq), GFP_KERNEL); 11503f2304f8SSagi Grimberg if (!icreq) 11513f2304f8SSagi Grimberg return -ENOMEM; 11523f2304f8SSagi Grimberg 11533f2304f8SSagi Grimberg icresp = kzalloc(sizeof(*icresp), GFP_KERNEL); 11543f2304f8SSagi Grimberg if (!icresp) { 11553f2304f8SSagi Grimberg ret = -ENOMEM; 11563f2304f8SSagi Grimberg goto free_icreq; 11573f2304f8SSagi Grimberg } 11583f2304f8SSagi Grimberg 11593f2304f8SSagi Grimberg icreq->hdr.type = nvme_tcp_icreq; 11603f2304f8SSagi Grimberg icreq->hdr.hlen = sizeof(*icreq); 11613f2304f8SSagi Grimberg icreq->hdr.pdo = 0; 11623f2304f8SSagi Grimberg icreq->hdr.plen = cpu_to_le32(icreq->hdr.hlen); 11633f2304f8SSagi Grimberg icreq->pfv = cpu_to_le16(NVME_TCP_PFV_1_0); 11643f2304f8SSagi Grimberg icreq->maxr2t = 0; /* single inflight r2t supported */ 11653f2304f8SSagi Grimberg icreq->hpda = 0; /* no alignment constraint */ 11663f2304f8SSagi Grimberg if (queue->hdr_digest) 11673f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_HDR_DIGEST_ENABLE; 11683f2304f8SSagi Grimberg if (queue->data_digest) 11693f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_DATA_DIGEST_ENABLE; 11703f2304f8SSagi Grimberg 11713f2304f8SSagi Grimberg iov.iov_base = icreq; 11723f2304f8SSagi Grimberg iov.iov_len = sizeof(*icreq); 11733f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 11743f2304f8SSagi Grimberg if (ret < 0) 11753f2304f8SSagi Grimberg goto free_icresp; 11763f2304f8SSagi Grimberg 11773f2304f8SSagi Grimberg memset(&msg, 0, sizeof(msg)); 11783f2304f8SSagi Grimberg iov.iov_base = icresp; 11793f2304f8SSagi Grimberg iov.iov_len = sizeof(*icresp); 11803f2304f8SSagi Grimberg ret = kernel_recvmsg(queue->sock, &msg, &iov, 1, 11813f2304f8SSagi Grimberg iov.iov_len, msg.msg_flags); 11823f2304f8SSagi Grimberg if (ret < 0) 11833f2304f8SSagi Grimberg goto free_icresp; 11843f2304f8SSagi Grimberg 11853f2304f8SSagi Grimberg ret = -EINVAL; 11863f2304f8SSagi Grimberg if (icresp->hdr.type != nvme_tcp_icresp) { 11873f2304f8SSagi Grimberg pr_err("queue %d: bad type returned %d\n", 11883f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.type); 11893f2304f8SSagi Grimberg goto free_icresp; 11903f2304f8SSagi Grimberg } 11913f2304f8SSagi Grimberg 11923f2304f8SSagi Grimberg if (le32_to_cpu(icresp->hdr.plen) != sizeof(*icresp)) { 11933f2304f8SSagi Grimberg pr_err("queue %d: bad pdu length returned %d\n", 11943f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.plen); 11953f2304f8SSagi Grimberg goto free_icresp; 11963f2304f8SSagi Grimberg } 11973f2304f8SSagi Grimberg 11983f2304f8SSagi Grimberg if (icresp->pfv != NVME_TCP_PFV_1_0) { 11993f2304f8SSagi Grimberg pr_err("queue %d: bad pfv returned %d\n", 12003f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->pfv); 12013f2304f8SSagi Grimberg goto free_icresp; 12023f2304f8SSagi Grimberg } 12033f2304f8SSagi Grimberg 12043f2304f8SSagi Grimberg ctrl_ddgst = !!(icresp->digest & NVME_TCP_DATA_DIGEST_ENABLE); 12053f2304f8SSagi Grimberg if ((queue->data_digest && !ctrl_ddgst) || 12063f2304f8SSagi Grimberg (!queue->data_digest && ctrl_ddgst)) { 12073f2304f8SSagi Grimberg pr_err("queue %d: data digest mismatch host: %s ctrl: %s\n", 12083f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12093f2304f8SSagi Grimberg queue->data_digest ? "enabled" : "disabled", 12103f2304f8SSagi Grimberg ctrl_ddgst ? "enabled" : "disabled"); 12113f2304f8SSagi Grimberg goto free_icresp; 12123f2304f8SSagi Grimberg } 12133f2304f8SSagi Grimberg 12143f2304f8SSagi Grimberg ctrl_hdgst = !!(icresp->digest & NVME_TCP_HDR_DIGEST_ENABLE); 12153f2304f8SSagi Grimberg if ((queue->hdr_digest && !ctrl_hdgst) || 12163f2304f8SSagi Grimberg (!queue->hdr_digest && ctrl_hdgst)) { 12173f2304f8SSagi Grimberg pr_err("queue %d: header digest mismatch host: %s ctrl: %s\n", 12183f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12193f2304f8SSagi Grimberg queue->hdr_digest ? "enabled" : "disabled", 12203f2304f8SSagi Grimberg ctrl_hdgst ? "enabled" : "disabled"); 12213f2304f8SSagi Grimberg goto free_icresp; 12223f2304f8SSagi Grimberg } 12233f2304f8SSagi Grimberg 12243f2304f8SSagi Grimberg if (icresp->cpda != 0) { 12253f2304f8SSagi Grimberg pr_err("queue %d: unsupported cpda returned %d\n", 12263f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->cpda); 12273f2304f8SSagi Grimberg goto free_icresp; 12283f2304f8SSagi Grimberg } 12293f2304f8SSagi Grimberg 12303f2304f8SSagi Grimberg ret = 0; 12313f2304f8SSagi Grimberg free_icresp: 12323f2304f8SSagi Grimberg kfree(icresp); 12333f2304f8SSagi Grimberg free_icreq: 12343f2304f8SSagi Grimberg kfree(icreq); 12353f2304f8SSagi Grimberg return ret; 12363f2304f8SSagi Grimberg } 12373f2304f8SSagi Grimberg 12383f2304f8SSagi Grimberg static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, 12393f2304f8SSagi Grimberg int qid, size_t queue_size) 12403f2304f8SSagi Grimberg { 12413f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 12423f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 12433f2304f8SSagi Grimberg struct linger sol = { .l_onoff = 1, .l_linger = 0 }; 1244873946f4SSagi Grimberg int ret, opt, rcv_pdu_size, n; 12453f2304f8SSagi Grimberg 12463f2304f8SSagi Grimberg queue->ctrl = ctrl; 12473f2304f8SSagi Grimberg INIT_LIST_HEAD(&queue->send_list); 12483f2304f8SSagi Grimberg spin_lock_init(&queue->lock); 12493f2304f8SSagi Grimberg INIT_WORK(&queue->io_work, nvme_tcp_io_work); 12503f2304f8SSagi Grimberg queue->queue_size = queue_size; 12513f2304f8SSagi Grimberg 12523f2304f8SSagi Grimberg if (qid > 0) 12533f2304f8SSagi Grimberg queue->cmnd_capsule_len = ctrl->ctrl.ioccsz * 16; 12543f2304f8SSagi Grimberg else 12553f2304f8SSagi Grimberg queue->cmnd_capsule_len = sizeof(struct nvme_command) + 12563f2304f8SSagi Grimberg NVME_TCP_ADMIN_CCSZ; 12573f2304f8SSagi Grimberg 12583f2304f8SSagi Grimberg ret = sock_create(ctrl->addr.ss_family, SOCK_STREAM, 12593f2304f8SSagi Grimberg IPPROTO_TCP, &queue->sock); 12603f2304f8SSagi Grimberg if (ret) { 12613f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 12623f2304f8SSagi Grimberg "failed to create socket: %d\n", ret); 12633f2304f8SSagi Grimberg return ret; 12643f2304f8SSagi Grimberg } 12653f2304f8SSagi Grimberg 12663f2304f8SSagi Grimberg /* Single syn retry */ 12673f2304f8SSagi Grimberg opt = 1; 12683f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, IPPROTO_TCP, TCP_SYNCNT, 12693f2304f8SSagi Grimberg (char *)&opt, sizeof(opt)); 12703f2304f8SSagi Grimberg if (ret) { 12713f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 12723f2304f8SSagi Grimberg "failed to set TCP_SYNCNT sock opt %d\n", ret); 12733f2304f8SSagi Grimberg goto err_sock; 12743f2304f8SSagi Grimberg } 12753f2304f8SSagi Grimberg 12763f2304f8SSagi Grimberg /* Set TCP no delay */ 12773f2304f8SSagi Grimberg opt = 1; 12783f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, IPPROTO_TCP, 12793f2304f8SSagi Grimberg TCP_NODELAY, (char *)&opt, sizeof(opt)); 12803f2304f8SSagi Grimberg if (ret) { 12813f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 12823f2304f8SSagi Grimberg "failed to set TCP_NODELAY sock opt %d\n", ret); 12833f2304f8SSagi Grimberg goto err_sock; 12843f2304f8SSagi Grimberg } 12853f2304f8SSagi Grimberg 12863f2304f8SSagi Grimberg /* 12873f2304f8SSagi Grimberg * Cleanup whatever is sitting in the TCP transmit queue on socket 12883f2304f8SSagi Grimberg * close. This is done to prevent stale data from being sent should 12893f2304f8SSagi Grimberg * the network connection be restored before TCP times out. 12903f2304f8SSagi Grimberg */ 12913f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_LINGER, 12923f2304f8SSagi Grimberg (char *)&sol, sizeof(sol)); 12933f2304f8SSagi Grimberg if (ret) { 12943f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 12953f2304f8SSagi Grimberg "failed to set SO_LINGER sock opt %d\n", ret); 12963f2304f8SSagi Grimberg goto err_sock; 12973f2304f8SSagi Grimberg } 12983f2304f8SSagi Grimberg 12993f2304f8SSagi Grimberg queue->sock->sk->sk_allocation = GFP_ATOMIC; 1300873946f4SSagi Grimberg if (!qid) 1301873946f4SSagi Grimberg n = 0; 1302873946f4SSagi Grimberg else 1303873946f4SSagi Grimberg n = (qid - 1) % num_online_cpus(); 1304873946f4SSagi Grimberg queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false); 13053f2304f8SSagi Grimberg queue->request = NULL; 13063f2304f8SSagi Grimberg queue->data_remaining = 0; 13073f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 13083f2304f8SSagi Grimberg queue->pdu_remaining = 0; 13093f2304f8SSagi Grimberg queue->pdu_offset = 0; 13103f2304f8SSagi Grimberg sk_set_memalloc(queue->sock->sk); 13113f2304f8SSagi Grimberg 13123f2304f8SSagi Grimberg if (ctrl->ctrl.opts->mask & NVMF_OPT_HOST_TRADDR) { 13133f2304f8SSagi Grimberg ret = kernel_bind(queue->sock, (struct sockaddr *)&ctrl->src_addr, 13143f2304f8SSagi Grimberg sizeof(ctrl->src_addr)); 13153f2304f8SSagi Grimberg if (ret) { 13163f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 13173f2304f8SSagi Grimberg "failed to bind queue %d socket %d\n", 13183f2304f8SSagi Grimberg qid, ret); 13193f2304f8SSagi Grimberg goto err_sock; 13203f2304f8SSagi Grimberg } 13213f2304f8SSagi Grimberg } 13223f2304f8SSagi Grimberg 13233f2304f8SSagi Grimberg queue->hdr_digest = nctrl->opts->hdr_digest; 13243f2304f8SSagi Grimberg queue->data_digest = nctrl->opts->data_digest; 13253f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) { 13263f2304f8SSagi Grimberg ret = nvme_tcp_alloc_crypto(queue); 13273f2304f8SSagi Grimberg if (ret) { 13283f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 13293f2304f8SSagi Grimberg "failed to allocate queue %d crypto\n", qid); 13303f2304f8SSagi Grimberg goto err_sock; 13313f2304f8SSagi Grimberg } 13323f2304f8SSagi Grimberg } 13333f2304f8SSagi Grimberg 13343f2304f8SSagi Grimberg rcv_pdu_size = sizeof(struct nvme_tcp_rsp_pdu) + 13353f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 13363f2304f8SSagi Grimberg queue->pdu = kmalloc(rcv_pdu_size, GFP_KERNEL); 13373f2304f8SSagi Grimberg if (!queue->pdu) { 13383f2304f8SSagi Grimberg ret = -ENOMEM; 13393f2304f8SSagi Grimberg goto err_crypto; 13403f2304f8SSagi Grimberg } 13413f2304f8SSagi Grimberg 13423f2304f8SSagi Grimberg dev_dbg(ctrl->ctrl.device, "connecting queue %d\n", 13433f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 13443f2304f8SSagi Grimberg 13453f2304f8SSagi Grimberg ret = kernel_connect(queue->sock, (struct sockaddr *)&ctrl->addr, 13463f2304f8SSagi Grimberg sizeof(ctrl->addr), 0); 13473f2304f8SSagi Grimberg if (ret) { 13483f2304f8SSagi Grimberg dev_err(ctrl->ctrl.device, 13493f2304f8SSagi Grimberg "failed to connect socket: %d\n", ret); 13503f2304f8SSagi Grimberg goto err_rcv_pdu; 13513f2304f8SSagi Grimberg } 13523f2304f8SSagi Grimberg 13533f2304f8SSagi Grimberg ret = nvme_tcp_init_connection(queue); 13543f2304f8SSagi Grimberg if (ret) 13553f2304f8SSagi Grimberg goto err_init_connect; 13563f2304f8SSagi Grimberg 13573f2304f8SSagi Grimberg queue->rd_enabled = true; 13583f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_ALLOCATED, &queue->flags); 13593f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 13603f2304f8SSagi Grimberg 13613f2304f8SSagi Grimberg write_lock_bh(&queue->sock->sk->sk_callback_lock); 13623f2304f8SSagi Grimberg queue->sock->sk->sk_user_data = queue; 13633f2304f8SSagi Grimberg queue->state_change = queue->sock->sk->sk_state_change; 13643f2304f8SSagi Grimberg queue->data_ready = queue->sock->sk->sk_data_ready; 13653f2304f8SSagi Grimberg queue->write_space = queue->sock->sk->sk_write_space; 13663f2304f8SSagi Grimberg queue->sock->sk->sk_data_ready = nvme_tcp_data_ready; 13673f2304f8SSagi Grimberg queue->sock->sk->sk_state_change = nvme_tcp_state_change; 13683f2304f8SSagi Grimberg queue->sock->sk->sk_write_space = nvme_tcp_write_space; 13693f2304f8SSagi Grimberg write_unlock_bh(&queue->sock->sk->sk_callback_lock); 13703f2304f8SSagi Grimberg 13713f2304f8SSagi Grimberg return 0; 13723f2304f8SSagi Grimberg 13733f2304f8SSagi Grimberg err_init_connect: 13743f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 13753f2304f8SSagi Grimberg err_rcv_pdu: 13763f2304f8SSagi Grimberg kfree(queue->pdu); 13773f2304f8SSagi Grimberg err_crypto: 13783f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 13793f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 13803f2304f8SSagi Grimberg err_sock: 13813f2304f8SSagi Grimberg sock_release(queue->sock); 13823f2304f8SSagi Grimberg queue->sock = NULL; 13833f2304f8SSagi Grimberg return ret; 13843f2304f8SSagi Grimberg } 13853f2304f8SSagi Grimberg 13863f2304f8SSagi Grimberg static void nvme_tcp_restore_sock_calls(struct nvme_tcp_queue *queue) 13873f2304f8SSagi Grimberg { 13883f2304f8SSagi Grimberg struct socket *sock = queue->sock; 13893f2304f8SSagi Grimberg 13903f2304f8SSagi Grimberg write_lock_bh(&sock->sk->sk_callback_lock); 13913f2304f8SSagi Grimberg sock->sk->sk_user_data = NULL; 13923f2304f8SSagi Grimberg sock->sk->sk_data_ready = queue->data_ready; 13933f2304f8SSagi Grimberg sock->sk->sk_state_change = queue->state_change; 13943f2304f8SSagi Grimberg sock->sk->sk_write_space = queue->write_space; 13953f2304f8SSagi Grimberg write_unlock_bh(&sock->sk->sk_callback_lock); 13963f2304f8SSagi Grimberg } 13973f2304f8SSagi Grimberg 13983f2304f8SSagi Grimberg static void __nvme_tcp_stop_queue(struct nvme_tcp_queue *queue) 13993f2304f8SSagi Grimberg { 14003f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 14013f2304f8SSagi Grimberg nvme_tcp_restore_sock_calls(queue); 14023f2304f8SSagi Grimberg cancel_work_sync(&queue->io_work); 14033f2304f8SSagi Grimberg } 14043f2304f8SSagi Grimberg 14053f2304f8SSagi Grimberg static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid) 14063f2304f8SSagi Grimberg { 14073f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 14083f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 14093f2304f8SSagi Grimberg 14103f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_LIVE, &queue->flags)) 14113f2304f8SSagi Grimberg return; 14123f2304f8SSagi Grimberg 14133f2304f8SSagi Grimberg __nvme_tcp_stop_queue(queue); 14143f2304f8SSagi Grimberg } 14153f2304f8SSagi Grimberg 14163f2304f8SSagi Grimberg static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx) 14173f2304f8SSagi Grimberg { 14183f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 14193f2304f8SSagi Grimberg int ret; 14203f2304f8SSagi Grimberg 14213f2304f8SSagi Grimberg if (idx) 142226c68227SSagi Grimberg ret = nvmf_connect_io_queue(nctrl, idx, false); 14233f2304f8SSagi Grimberg else 14243f2304f8SSagi Grimberg ret = nvmf_connect_admin_queue(nctrl); 14253f2304f8SSagi Grimberg 14263f2304f8SSagi Grimberg if (!ret) { 14273f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_LIVE, &ctrl->queues[idx].flags); 14283f2304f8SSagi Grimberg } else { 1429f34e2589SSagi Grimberg if (test_bit(NVME_TCP_Q_ALLOCATED, &ctrl->queues[idx].flags)) 14303f2304f8SSagi Grimberg __nvme_tcp_stop_queue(&ctrl->queues[idx]); 14313f2304f8SSagi Grimberg dev_err(nctrl->device, 14323f2304f8SSagi Grimberg "failed to connect queue: %d ret=%d\n", idx, ret); 14333f2304f8SSagi Grimberg } 14343f2304f8SSagi Grimberg return ret; 14353f2304f8SSagi Grimberg } 14363f2304f8SSagi Grimberg 14373f2304f8SSagi Grimberg static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl, 14383f2304f8SSagi Grimberg bool admin) 14393f2304f8SSagi Grimberg { 14403f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 14413f2304f8SSagi Grimberg struct blk_mq_tag_set *set; 14423f2304f8SSagi Grimberg int ret; 14433f2304f8SSagi Grimberg 14443f2304f8SSagi Grimberg if (admin) { 14453f2304f8SSagi Grimberg set = &ctrl->admin_tag_set; 14463f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 14473f2304f8SSagi Grimberg set->ops = &nvme_tcp_admin_mq_ops; 14483f2304f8SSagi Grimberg set->queue_depth = NVME_AQ_MQ_TAG_DEPTH; 14493f2304f8SSagi Grimberg set->reserved_tags = 2; /* connect + keep-alive */ 14503f2304f8SSagi Grimberg set->numa_node = NUMA_NO_NODE; 14513f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 14523f2304f8SSagi Grimberg set->driver_data = ctrl; 14533f2304f8SSagi Grimberg set->nr_hw_queues = 1; 14543f2304f8SSagi Grimberg set->timeout = ADMIN_TIMEOUT; 14553f2304f8SSagi Grimberg } else { 14563f2304f8SSagi Grimberg set = &ctrl->tag_set; 14573f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 14583f2304f8SSagi Grimberg set->ops = &nvme_tcp_mq_ops; 14593f2304f8SSagi Grimberg set->queue_depth = nctrl->sqsize + 1; 14603f2304f8SSagi Grimberg set->reserved_tags = 1; /* fabric connect */ 14613f2304f8SSagi Grimberg set->numa_node = NUMA_NO_NODE; 14623f2304f8SSagi Grimberg set->flags = BLK_MQ_F_SHOULD_MERGE; 14633f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 14643f2304f8SSagi Grimberg set->driver_data = ctrl; 14653f2304f8SSagi Grimberg set->nr_hw_queues = nctrl->queue_count - 1; 14663f2304f8SSagi Grimberg set->timeout = NVME_IO_TIMEOUT; 1467873946f4SSagi Grimberg set->nr_maps = 2 /* default + read */; 14683f2304f8SSagi Grimberg } 14693f2304f8SSagi Grimberg 14703f2304f8SSagi Grimberg ret = blk_mq_alloc_tag_set(set); 14713f2304f8SSagi Grimberg if (ret) 14723f2304f8SSagi Grimberg return ERR_PTR(ret); 14733f2304f8SSagi Grimberg 14743f2304f8SSagi Grimberg return set; 14753f2304f8SSagi Grimberg } 14763f2304f8SSagi Grimberg 14773f2304f8SSagi Grimberg static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl) 14783f2304f8SSagi Grimberg { 14793f2304f8SSagi Grimberg if (to_tcp_ctrl(ctrl)->async_req.pdu) { 14803f2304f8SSagi Grimberg nvme_tcp_free_async_req(to_tcp_ctrl(ctrl)); 14813f2304f8SSagi Grimberg to_tcp_ctrl(ctrl)->async_req.pdu = NULL; 14823f2304f8SSagi Grimberg } 14833f2304f8SSagi Grimberg 14843f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 14853f2304f8SSagi Grimberg } 14863f2304f8SSagi Grimberg 14873f2304f8SSagi Grimberg static void nvme_tcp_free_io_queues(struct nvme_ctrl *ctrl) 14883f2304f8SSagi Grimberg { 14893f2304f8SSagi Grimberg int i; 14903f2304f8SSagi Grimberg 14913f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 14923f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 14933f2304f8SSagi Grimberg } 14943f2304f8SSagi Grimberg 14953f2304f8SSagi Grimberg static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl) 14963f2304f8SSagi Grimberg { 14973f2304f8SSagi Grimberg int i; 14983f2304f8SSagi Grimberg 14993f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 15003f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 15013f2304f8SSagi Grimberg } 15023f2304f8SSagi Grimberg 15033f2304f8SSagi Grimberg static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl) 15043f2304f8SSagi Grimberg { 15053f2304f8SSagi Grimberg int i, ret = 0; 15063f2304f8SSagi Grimberg 15073f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 15083f2304f8SSagi Grimberg ret = nvme_tcp_start_queue(ctrl, i); 15093f2304f8SSagi Grimberg if (ret) 15103f2304f8SSagi Grimberg goto out_stop_queues; 15113f2304f8SSagi Grimberg } 15123f2304f8SSagi Grimberg 15133f2304f8SSagi Grimberg return 0; 15143f2304f8SSagi Grimberg 15153f2304f8SSagi Grimberg out_stop_queues: 15163f2304f8SSagi Grimberg for (i--; i >= 1; i--) 15173f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 15183f2304f8SSagi Grimberg return ret; 15193f2304f8SSagi Grimberg } 15203f2304f8SSagi Grimberg 15213f2304f8SSagi Grimberg static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl) 15223f2304f8SSagi Grimberg { 15233f2304f8SSagi Grimberg int ret; 15243f2304f8SSagi Grimberg 15253f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, 0, NVME_AQ_DEPTH); 15263f2304f8SSagi Grimberg if (ret) 15273f2304f8SSagi Grimberg return ret; 15283f2304f8SSagi Grimberg 15293f2304f8SSagi Grimberg ret = nvme_tcp_alloc_async_req(to_tcp_ctrl(ctrl)); 15303f2304f8SSagi Grimberg if (ret) 15313f2304f8SSagi Grimberg goto out_free_queue; 15323f2304f8SSagi Grimberg 15333f2304f8SSagi Grimberg return 0; 15343f2304f8SSagi Grimberg 15353f2304f8SSagi Grimberg out_free_queue: 15363f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 15373f2304f8SSagi Grimberg return ret; 15383f2304f8SSagi Grimberg } 15393f2304f8SSagi Grimberg 1540efb973b1SSagi Grimberg static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 15413f2304f8SSagi Grimberg { 15423f2304f8SSagi Grimberg int i, ret; 15433f2304f8SSagi Grimberg 15443f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 15453f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, i, 15463f2304f8SSagi Grimberg ctrl->sqsize + 1); 15473f2304f8SSagi Grimberg if (ret) 15483f2304f8SSagi Grimberg goto out_free_queues; 15493f2304f8SSagi Grimberg } 15503f2304f8SSagi Grimberg 15513f2304f8SSagi Grimberg return 0; 15523f2304f8SSagi Grimberg 15533f2304f8SSagi Grimberg out_free_queues: 15543f2304f8SSagi Grimberg for (i--; i >= 1; i--) 15553f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 15563f2304f8SSagi Grimberg 15573f2304f8SSagi Grimberg return ret; 15583f2304f8SSagi Grimberg } 15593f2304f8SSagi Grimberg 15603f2304f8SSagi Grimberg static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl) 15613f2304f8SSagi Grimberg { 1562873946f4SSagi Grimberg unsigned int nr_io_queues; 1563873946f4SSagi Grimberg 1564873946f4SSagi Grimberg nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus()); 1565873946f4SSagi Grimberg nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus()); 1566873946f4SSagi Grimberg 1567873946f4SSagi Grimberg return nr_io_queues; 15683f2304f8SSagi Grimberg } 15693f2304f8SSagi Grimberg 157064861993SSagi Grimberg static void nvme_tcp_set_io_queues(struct nvme_ctrl *nctrl, 157164861993SSagi Grimberg unsigned int nr_io_queues) 157264861993SSagi Grimberg { 157364861993SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 157464861993SSagi Grimberg struct nvmf_ctrl_options *opts = nctrl->opts; 157564861993SSagi Grimberg 157664861993SSagi Grimberg if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) { 157764861993SSagi Grimberg /* 157864861993SSagi Grimberg * separate read/write queues 157964861993SSagi Grimberg * hand out dedicated default queues only after we have 158064861993SSagi Grimberg * sufficient read queues. 158164861993SSagi Grimberg */ 158264861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues; 158364861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ]; 158464861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 158564861993SSagi Grimberg min(opts->nr_write_queues, nr_io_queues); 158664861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 158764861993SSagi Grimberg } else { 158864861993SSagi Grimberg /* 158964861993SSagi Grimberg * shared read/write queues 159064861993SSagi Grimberg * either no write queues were requested, or we don't have 159164861993SSagi Grimberg * sufficient queue count to have dedicated default queues. 159264861993SSagi Grimberg */ 159364861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 159464861993SSagi Grimberg min(opts->nr_io_queues, nr_io_queues); 159564861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 159664861993SSagi Grimberg } 159764861993SSagi Grimberg } 159864861993SSagi Grimberg 1599efb973b1SSagi Grimberg static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 16003f2304f8SSagi Grimberg { 16013f2304f8SSagi Grimberg unsigned int nr_io_queues; 16023f2304f8SSagi Grimberg int ret; 16033f2304f8SSagi Grimberg 16043f2304f8SSagi Grimberg nr_io_queues = nvme_tcp_nr_io_queues(ctrl); 16053f2304f8SSagi Grimberg ret = nvme_set_queue_count(ctrl, &nr_io_queues); 16063f2304f8SSagi Grimberg if (ret) 16073f2304f8SSagi Grimberg return ret; 16083f2304f8SSagi Grimberg 16093f2304f8SSagi Grimberg ctrl->queue_count = nr_io_queues + 1; 16103f2304f8SSagi Grimberg if (ctrl->queue_count < 2) 16113f2304f8SSagi Grimberg return 0; 16123f2304f8SSagi Grimberg 16133f2304f8SSagi Grimberg dev_info(ctrl->device, 16143f2304f8SSagi Grimberg "creating %d I/O queues.\n", nr_io_queues); 16153f2304f8SSagi Grimberg 161664861993SSagi Grimberg nvme_tcp_set_io_queues(ctrl, nr_io_queues); 161764861993SSagi Grimberg 1618efb973b1SSagi Grimberg return __nvme_tcp_alloc_io_queues(ctrl); 16193f2304f8SSagi Grimberg } 16203f2304f8SSagi Grimberg 16213f2304f8SSagi Grimberg static void nvme_tcp_destroy_io_queues(struct nvme_ctrl *ctrl, bool remove) 16223f2304f8SSagi Grimberg { 16233f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 16243f2304f8SSagi Grimberg if (remove) { 16253f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 16263f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 16273f2304f8SSagi Grimberg } 16283f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 16293f2304f8SSagi Grimberg } 16303f2304f8SSagi Grimberg 16313f2304f8SSagi Grimberg static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) 16323f2304f8SSagi Grimberg { 16333f2304f8SSagi Grimberg int ret; 16343f2304f8SSagi Grimberg 1635efb973b1SSagi Grimberg ret = nvme_tcp_alloc_io_queues(ctrl); 16363f2304f8SSagi Grimberg if (ret) 16373f2304f8SSagi Grimberg return ret; 16383f2304f8SSagi Grimberg 16393f2304f8SSagi Grimberg if (new) { 16403f2304f8SSagi Grimberg ctrl->tagset = nvme_tcp_alloc_tagset(ctrl, false); 16413f2304f8SSagi Grimberg if (IS_ERR(ctrl->tagset)) { 16423f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->tagset); 16433f2304f8SSagi Grimberg goto out_free_io_queues; 16443f2304f8SSagi Grimberg } 16453f2304f8SSagi Grimberg 16463f2304f8SSagi Grimberg ctrl->connect_q = blk_mq_init_queue(ctrl->tagset); 16473f2304f8SSagi Grimberg if (IS_ERR(ctrl->connect_q)) { 16483f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->connect_q); 16493f2304f8SSagi Grimberg goto out_free_tag_set; 16503f2304f8SSagi Grimberg } 16513f2304f8SSagi Grimberg } else { 16523f2304f8SSagi Grimberg blk_mq_update_nr_hw_queues(ctrl->tagset, 16533f2304f8SSagi Grimberg ctrl->queue_count - 1); 16543f2304f8SSagi Grimberg } 16553f2304f8SSagi Grimberg 16563f2304f8SSagi Grimberg ret = nvme_tcp_start_io_queues(ctrl); 16573f2304f8SSagi Grimberg if (ret) 16583f2304f8SSagi Grimberg goto out_cleanup_connect_q; 16593f2304f8SSagi Grimberg 16603f2304f8SSagi Grimberg return 0; 16613f2304f8SSagi Grimberg 16623f2304f8SSagi Grimberg out_cleanup_connect_q: 1663e85037a2SSagi Grimberg if (new) 16643f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 16653f2304f8SSagi Grimberg out_free_tag_set: 16663f2304f8SSagi Grimberg if (new) 16673f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 16683f2304f8SSagi Grimberg out_free_io_queues: 16693f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 16703f2304f8SSagi Grimberg return ret; 16713f2304f8SSagi Grimberg } 16723f2304f8SSagi Grimberg 16733f2304f8SSagi Grimberg static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove) 16743f2304f8SSagi Grimberg { 16753f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 16763f2304f8SSagi Grimberg if (remove) { 16773f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 16783f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 16793f2304f8SSagi Grimberg } 16803f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 16813f2304f8SSagi Grimberg } 16823f2304f8SSagi Grimberg 16833f2304f8SSagi Grimberg static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) 16843f2304f8SSagi Grimberg { 16853f2304f8SSagi Grimberg int error; 16863f2304f8SSagi Grimberg 16873f2304f8SSagi Grimberg error = nvme_tcp_alloc_admin_queue(ctrl); 16883f2304f8SSagi Grimberg if (error) 16893f2304f8SSagi Grimberg return error; 16903f2304f8SSagi Grimberg 16913f2304f8SSagi Grimberg if (new) { 16923f2304f8SSagi Grimberg ctrl->admin_tagset = nvme_tcp_alloc_tagset(ctrl, true); 16933f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_tagset)) { 16943f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_tagset); 16953f2304f8SSagi Grimberg goto out_free_queue; 16963f2304f8SSagi Grimberg } 16973f2304f8SSagi Grimberg 16983f2304f8SSagi Grimberg ctrl->admin_q = blk_mq_init_queue(ctrl->admin_tagset); 16993f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_q)) { 17003f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_q); 17013f2304f8SSagi Grimberg goto out_free_tagset; 17023f2304f8SSagi Grimberg } 17033f2304f8SSagi Grimberg } 17043f2304f8SSagi Grimberg 17053f2304f8SSagi Grimberg error = nvme_tcp_start_queue(ctrl, 0); 17063f2304f8SSagi Grimberg if (error) 17073f2304f8SSagi Grimberg goto out_cleanup_queue; 17083f2304f8SSagi Grimberg 17093f2304f8SSagi Grimberg error = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap); 17103f2304f8SSagi Grimberg if (error) { 17113f2304f8SSagi Grimberg dev_err(ctrl->device, 17123f2304f8SSagi Grimberg "prop_get NVME_REG_CAP failed\n"); 17133f2304f8SSagi Grimberg goto out_stop_queue; 17143f2304f8SSagi Grimberg } 17153f2304f8SSagi Grimberg 17163f2304f8SSagi Grimberg ctrl->sqsize = min_t(int, NVME_CAP_MQES(ctrl->cap), ctrl->sqsize); 17173f2304f8SSagi Grimberg 17183f2304f8SSagi Grimberg error = nvme_enable_ctrl(ctrl, ctrl->cap); 17193f2304f8SSagi Grimberg if (error) 17203f2304f8SSagi Grimberg goto out_stop_queue; 17213f2304f8SSagi Grimberg 17223f2304f8SSagi Grimberg error = nvme_init_identify(ctrl); 17233f2304f8SSagi Grimberg if (error) 17243f2304f8SSagi Grimberg goto out_stop_queue; 17253f2304f8SSagi Grimberg 17263f2304f8SSagi Grimberg return 0; 17273f2304f8SSagi Grimberg 17283f2304f8SSagi Grimberg out_stop_queue: 17293f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 17303f2304f8SSagi Grimberg out_cleanup_queue: 17313f2304f8SSagi Grimberg if (new) 17323f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 17333f2304f8SSagi Grimberg out_free_tagset: 17343f2304f8SSagi Grimberg if (new) 17353f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 17363f2304f8SSagi Grimberg out_free_queue: 17373f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 17383f2304f8SSagi Grimberg return error; 17393f2304f8SSagi Grimberg } 17403f2304f8SSagi Grimberg 17413f2304f8SSagi Grimberg static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, 17423f2304f8SSagi Grimberg bool remove) 17433f2304f8SSagi Grimberg { 17443f2304f8SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 17453f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 1746622b8b68SMing Lei if (ctrl->admin_tagset) { 17477a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->admin_tagset, 17487a425896SSagi Grimberg nvme_cancel_request, ctrl); 1749622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->admin_tagset); 1750622b8b68SMing Lei } 17513f2304f8SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 17523f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, remove); 17533f2304f8SSagi Grimberg } 17543f2304f8SSagi Grimberg 17553f2304f8SSagi Grimberg static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl, 17563f2304f8SSagi Grimberg bool remove) 17573f2304f8SSagi Grimberg { 17583f2304f8SSagi Grimberg if (ctrl->queue_count <= 1) 17593f2304f8SSagi Grimberg return; 17603f2304f8SSagi Grimberg nvme_stop_queues(ctrl); 17613f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 1762622b8b68SMing Lei if (ctrl->tagset) { 17637a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->tagset, 17647a425896SSagi Grimberg nvme_cancel_request, ctrl); 1765622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->tagset); 1766622b8b68SMing Lei } 17673f2304f8SSagi Grimberg if (remove) 17683f2304f8SSagi Grimberg nvme_start_queues(ctrl); 17693f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, remove); 17703f2304f8SSagi Grimberg } 17713f2304f8SSagi Grimberg 17723f2304f8SSagi Grimberg static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl) 17733f2304f8SSagi Grimberg { 17743f2304f8SSagi Grimberg /* If we are resetting/deleting then do nothing */ 17753f2304f8SSagi Grimberg if (ctrl->state != NVME_CTRL_CONNECTING) { 17763f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state == NVME_CTRL_NEW || 17773f2304f8SSagi Grimberg ctrl->state == NVME_CTRL_LIVE); 17783f2304f8SSagi Grimberg return; 17793f2304f8SSagi Grimberg } 17803f2304f8SSagi Grimberg 17813f2304f8SSagi Grimberg if (nvmf_should_reconnect(ctrl)) { 17823f2304f8SSagi Grimberg dev_info(ctrl->device, "Reconnecting in %d seconds...\n", 17833f2304f8SSagi Grimberg ctrl->opts->reconnect_delay); 17843f2304f8SSagi Grimberg queue_delayed_work(nvme_wq, &to_tcp_ctrl(ctrl)->connect_work, 17853f2304f8SSagi Grimberg ctrl->opts->reconnect_delay * HZ); 17863f2304f8SSagi Grimberg } else { 17873f2304f8SSagi Grimberg dev_info(ctrl->device, "Removing controller...\n"); 17883f2304f8SSagi Grimberg nvme_delete_ctrl(ctrl); 17893f2304f8SSagi Grimberg } 17903f2304f8SSagi Grimberg } 17913f2304f8SSagi Grimberg 17923f2304f8SSagi Grimberg static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) 17933f2304f8SSagi Grimberg { 17943f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->opts; 17953f2304f8SSagi Grimberg int ret = -EINVAL; 17963f2304f8SSagi Grimberg 17973f2304f8SSagi Grimberg ret = nvme_tcp_configure_admin_queue(ctrl, new); 17983f2304f8SSagi Grimberg if (ret) 17993f2304f8SSagi Grimberg return ret; 18003f2304f8SSagi Grimberg 18013f2304f8SSagi Grimberg if (ctrl->icdoff) { 18023f2304f8SSagi Grimberg dev_err(ctrl->device, "icdoff is not supported!\n"); 18033f2304f8SSagi Grimberg goto destroy_admin; 18043f2304f8SSagi Grimberg } 18053f2304f8SSagi Grimberg 18063f2304f8SSagi Grimberg if (opts->queue_size > ctrl->sqsize + 1) 18073f2304f8SSagi Grimberg dev_warn(ctrl->device, 18083f2304f8SSagi Grimberg "queue_size %zu > ctrl sqsize %u, clamping down\n", 18093f2304f8SSagi Grimberg opts->queue_size, ctrl->sqsize + 1); 18103f2304f8SSagi Grimberg 18113f2304f8SSagi Grimberg if (ctrl->sqsize + 1 > ctrl->maxcmd) { 18123f2304f8SSagi Grimberg dev_warn(ctrl->device, 18133f2304f8SSagi Grimberg "sqsize %u > ctrl maxcmd %u, clamping down\n", 18143f2304f8SSagi Grimberg ctrl->sqsize + 1, ctrl->maxcmd); 18153f2304f8SSagi Grimberg ctrl->sqsize = ctrl->maxcmd - 1; 18163f2304f8SSagi Grimberg } 18173f2304f8SSagi Grimberg 18183f2304f8SSagi Grimberg if (ctrl->queue_count > 1) { 18193f2304f8SSagi Grimberg ret = nvme_tcp_configure_io_queues(ctrl, new); 18203f2304f8SSagi Grimberg if (ret) 18213f2304f8SSagi Grimberg goto destroy_admin; 18223f2304f8SSagi Grimberg } 18233f2304f8SSagi Grimberg 18243f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) { 18253f2304f8SSagi Grimberg /* state change failure is ok if we're in DELETING state */ 18263f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 18273f2304f8SSagi Grimberg ret = -EINVAL; 18283f2304f8SSagi Grimberg goto destroy_io; 18293f2304f8SSagi Grimberg } 18303f2304f8SSagi Grimberg 18313f2304f8SSagi Grimberg nvme_start_ctrl(ctrl); 18323f2304f8SSagi Grimberg return 0; 18333f2304f8SSagi Grimberg 18343f2304f8SSagi Grimberg destroy_io: 18353f2304f8SSagi Grimberg if (ctrl->queue_count > 1) 18363f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, new); 18373f2304f8SSagi Grimberg destroy_admin: 18383f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18393f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, new); 18403f2304f8SSagi Grimberg return ret; 18413f2304f8SSagi Grimberg } 18423f2304f8SSagi Grimberg 18433f2304f8SSagi Grimberg static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work) 18443f2304f8SSagi Grimberg { 18453f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(to_delayed_work(work), 18463f2304f8SSagi Grimberg struct nvme_tcp_ctrl, connect_work); 18473f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 18483f2304f8SSagi Grimberg 18493f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 18503f2304f8SSagi Grimberg 18513f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 18523f2304f8SSagi Grimberg goto requeue; 18533f2304f8SSagi Grimberg 185456a77d26SColin Ian King dev_info(ctrl->device, "Successfully reconnected (%d attempt)\n", 18553f2304f8SSagi Grimberg ctrl->nr_reconnects); 18563f2304f8SSagi Grimberg 18573f2304f8SSagi Grimberg ctrl->nr_reconnects = 0; 18583f2304f8SSagi Grimberg 18593f2304f8SSagi Grimberg return; 18603f2304f8SSagi Grimberg 18613f2304f8SSagi Grimberg requeue: 18623f2304f8SSagi Grimberg dev_info(ctrl->device, "Failed reconnect attempt %d\n", 18633f2304f8SSagi Grimberg ctrl->nr_reconnects); 18643f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 18653f2304f8SSagi Grimberg } 18663f2304f8SSagi Grimberg 18673f2304f8SSagi Grimberg static void nvme_tcp_error_recovery_work(struct work_struct *work) 18683f2304f8SSagi Grimberg { 18693f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(work, 18703f2304f8SSagi Grimberg struct nvme_tcp_ctrl, err_work); 18713f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 18723f2304f8SSagi Grimberg 18733f2304f8SSagi Grimberg nvme_stop_keep_alive(ctrl); 18743f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, false); 18753f2304f8SSagi Grimberg /* unquiesce to fail fast pending requests */ 18763f2304f8SSagi Grimberg nvme_start_queues(ctrl); 18773f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, false); 18783f2304f8SSagi Grimberg 18793f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 18803f2304f8SSagi Grimberg /* state change failure is ok if we're in DELETING state */ 18813f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 18823f2304f8SSagi Grimberg return; 18833f2304f8SSagi Grimberg } 18843f2304f8SSagi Grimberg 18853f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 18863f2304f8SSagi Grimberg } 18873f2304f8SSagi Grimberg 18883f2304f8SSagi Grimberg static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown) 18893f2304f8SSagi Grimberg { 1890794a4cb3SSagi Grimberg cancel_work_sync(&to_tcp_ctrl(ctrl)->err_work); 1891794a4cb3SSagi Grimberg cancel_delayed_work_sync(&to_tcp_ctrl(ctrl)->connect_work); 1892794a4cb3SSagi Grimberg 18933f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, shutdown); 18943f2304f8SSagi Grimberg if (shutdown) 18953f2304f8SSagi Grimberg nvme_shutdown_ctrl(ctrl); 18963f2304f8SSagi Grimberg else 18973f2304f8SSagi Grimberg nvme_disable_ctrl(ctrl, ctrl->cap); 18983f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, shutdown); 18993f2304f8SSagi Grimberg } 19003f2304f8SSagi Grimberg 19013f2304f8SSagi Grimberg static void nvme_tcp_delete_ctrl(struct nvme_ctrl *ctrl) 19023f2304f8SSagi Grimberg { 19033f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, true); 19043f2304f8SSagi Grimberg } 19053f2304f8SSagi Grimberg 19063f2304f8SSagi Grimberg static void nvme_reset_ctrl_work(struct work_struct *work) 19073f2304f8SSagi Grimberg { 19083f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = 19093f2304f8SSagi Grimberg container_of(work, struct nvme_ctrl, reset_work); 19103f2304f8SSagi Grimberg 19113f2304f8SSagi Grimberg nvme_stop_ctrl(ctrl); 19123f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, false); 19133f2304f8SSagi Grimberg 19143f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 19153f2304f8SSagi Grimberg /* state change failure is ok if we're in DELETING state */ 19163f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 19173f2304f8SSagi Grimberg return; 19183f2304f8SSagi Grimberg } 19193f2304f8SSagi Grimberg 19203f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 19213f2304f8SSagi Grimberg goto out_fail; 19223f2304f8SSagi Grimberg 19233f2304f8SSagi Grimberg return; 19243f2304f8SSagi Grimberg 19253f2304f8SSagi Grimberg out_fail: 19263f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 19273f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 19283f2304f8SSagi Grimberg } 19293f2304f8SSagi Grimberg 19303f2304f8SSagi Grimberg static void nvme_tcp_free_ctrl(struct nvme_ctrl *nctrl) 19313f2304f8SSagi Grimberg { 19323f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 19333f2304f8SSagi Grimberg 19343f2304f8SSagi Grimberg if (list_empty(&ctrl->list)) 19353f2304f8SSagi Grimberg goto free_ctrl; 19363f2304f8SSagi Grimberg 19373f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 19383f2304f8SSagi Grimberg list_del(&ctrl->list); 19393f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 19403f2304f8SSagi Grimberg 19413f2304f8SSagi Grimberg nvmf_free_options(nctrl->opts); 19423f2304f8SSagi Grimberg free_ctrl: 19433f2304f8SSagi Grimberg kfree(ctrl->queues); 19443f2304f8SSagi Grimberg kfree(ctrl); 19453f2304f8SSagi Grimberg } 19463f2304f8SSagi Grimberg 19473f2304f8SSagi Grimberg static void nvme_tcp_set_sg_null(struct nvme_command *c) 19483f2304f8SSagi Grimberg { 19493f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 19503f2304f8SSagi Grimberg 19513f2304f8SSagi Grimberg sg->addr = 0; 19523f2304f8SSagi Grimberg sg->length = 0; 19533f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 19543f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 19553f2304f8SSagi Grimberg } 19563f2304f8SSagi Grimberg 19573f2304f8SSagi Grimberg static void nvme_tcp_set_sg_inline(struct nvme_tcp_queue *queue, 19583f2304f8SSagi Grimberg struct nvme_command *c, u32 data_len) 19593f2304f8SSagi Grimberg { 19603f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 19613f2304f8SSagi Grimberg 19623f2304f8SSagi Grimberg sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); 19633f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 19643f2304f8SSagi Grimberg sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; 19653f2304f8SSagi Grimberg } 19663f2304f8SSagi Grimberg 19673f2304f8SSagi Grimberg static void nvme_tcp_set_sg_host_data(struct nvme_command *c, 19683f2304f8SSagi Grimberg u32 data_len) 19693f2304f8SSagi Grimberg { 19703f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 19713f2304f8SSagi Grimberg 19723f2304f8SSagi Grimberg sg->addr = 0; 19733f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 19743f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 19753f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 19763f2304f8SSagi Grimberg } 19773f2304f8SSagi Grimberg 19783f2304f8SSagi Grimberg static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg) 19793f2304f8SSagi Grimberg { 19803f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(arg); 19813f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 19823f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = ctrl->async_req.pdu; 19833f2304f8SSagi Grimberg struct nvme_command *cmd = &pdu->cmd; 19843f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 19853f2304f8SSagi Grimberg 19863f2304f8SSagi Grimberg memset(pdu, 0, sizeof(*pdu)); 19873f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 19883f2304f8SSagi Grimberg if (queue->hdr_digest) 19893f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 19903f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 19913f2304f8SSagi Grimberg pdu->hdr.plen = cpu_to_le32(pdu->hdr.hlen + hdgst); 19923f2304f8SSagi Grimberg 19933f2304f8SSagi Grimberg cmd->common.opcode = nvme_admin_async_event; 19943f2304f8SSagi Grimberg cmd->common.command_id = NVME_AQ_BLK_MQ_DEPTH; 19953f2304f8SSagi Grimberg cmd->common.flags |= NVME_CMD_SGL_METABUF; 19963f2304f8SSagi Grimberg nvme_tcp_set_sg_null(cmd); 19973f2304f8SSagi Grimberg 19983f2304f8SSagi Grimberg ctrl->async_req.state = NVME_TCP_SEND_CMD_PDU; 19993f2304f8SSagi Grimberg ctrl->async_req.offset = 0; 20003f2304f8SSagi Grimberg ctrl->async_req.curr_bio = NULL; 20013f2304f8SSagi Grimberg ctrl->async_req.data_len = 0; 20023f2304f8SSagi Grimberg 20033f2304f8SSagi Grimberg nvme_tcp_queue_request(&ctrl->async_req); 20043f2304f8SSagi Grimberg } 20053f2304f8SSagi Grimberg 20063f2304f8SSagi Grimberg static enum blk_eh_timer_return 20073f2304f8SSagi Grimberg nvme_tcp_timeout(struct request *rq, bool reserved) 20083f2304f8SSagi Grimberg { 20093f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 20103f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = req->queue->ctrl; 20113f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 20123f2304f8SSagi Grimberg 201339d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, 20143f2304f8SSagi Grimberg "queue %d: timeout request %#x type %d\n", 201539d57757SSagi Grimberg nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type); 20163f2304f8SSagi Grimberg 20173f2304f8SSagi Grimberg if (ctrl->ctrl.state != NVME_CTRL_LIVE) { 201839d57757SSagi Grimberg /* 201939d57757SSagi Grimberg * Teardown immediately if controller times out while starting 202039d57757SSagi Grimberg * or we are already started error recovery. all outstanding 202139d57757SSagi Grimberg * requests are completed on shutdown, so we return BLK_EH_DONE. 202239d57757SSagi Grimberg */ 202339d57757SSagi Grimberg flush_work(&ctrl->err_work); 202439d57757SSagi Grimberg nvme_tcp_teardown_io_queues(&ctrl->ctrl, false); 202539d57757SSagi Grimberg nvme_tcp_teardown_admin_queue(&ctrl->ctrl, false); 20263f2304f8SSagi Grimberg return BLK_EH_DONE; 20273f2304f8SSagi Grimberg } 20283f2304f8SSagi Grimberg 202939d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, "starting error recovery\n"); 20303f2304f8SSagi Grimberg nvme_tcp_error_recovery(&ctrl->ctrl); 20313f2304f8SSagi Grimberg 20323f2304f8SSagi Grimberg return BLK_EH_RESET_TIMER; 20333f2304f8SSagi Grimberg } 20343f2304f8SSagi Grimberg 20353f2304f8SSagi Grimberg static blk_status_t nvme_tcp_map_data(struct nvme_tcp_queue *queue, 20363f2304f8SSagi Grimberg struct request *rq) 20373f2304f8SSagi Grimberg { 20383f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 20393f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 20403f2304f8SSagi Grimberg struct nvme_command *c = &pdu->cmd; 20413f2304f8SSagi Grimberg 20423f2304f8SSagi Grimberg c->common.flags |= NVME_CMD_SGL_METABUF; 20433f2304f8SSagi Grimberg 20443f2304f8SSagi Grimberg if (rq_data_dir(rq) == WRITE && req->data_len && 20453f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 20463f2304f8SSagi Grimberg nvme_tcp_set_sg_inline(queue, c, req->data_len); 20473f2304f8SSagi Grimberg else 20483f2304f8SSagi Grimberg nvme_tcp_set_sg_host_data(c, req->data_len); 20493f2304f8SSagi Grimberg 20503f2304f8SSagi Grimberg return 0; 20513f2304f8SSagi Grimberg } 20523f2304f8SSagi Grimberg 20533f2304f8SSagi Grimberg static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns, 20543f2304f8SSagi Grimberg struct request *rq) 20553f2304f8SSagi Grimberg { 20563f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 20573f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 20583f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 20593f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue), ddgst = 0; 20603f2304f8SSagi Grimberg blk_status_t ret; 20613f2304f8SSagi Grimberg 20623f2304f8SSagi Grimberg ret = nvme_setup_cmd(ns, rq, &pdu->cmd); 20633f2304f8SSagi Grimberg if (ret) 20643f2304f8SSagi Grimberg return ret; 20653f2304f8SSagi Grimberg 20663f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_CMD_PDU; 20673f2304f8SSagi Grimberg req->offset = 0; 20683f2304f8SSagi Grimberg req->data_sent = 0; 20693f2304f8SSagi Grimberg req->pdu_len = 0; 20703f2304f8SSagi Grimberg req->pdu_sent = 0; 20713f2304f8SSagi Grimberg req->data_len = blk_rq_payload_bytes(rq); 20723f2304f8SSagi Grimberg req->curr_bio = rq->bio; 20733f2304f8SSagi Grimberg 20743f2304f8SSagi Grimberg if (rq_data_dir(rq) == WRITE && 20753f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 20763f2304f8SSagi Grimberg req->pdu_len = req->data_len; 20773f2304f8SSagi Grimberg else if (req->curr_bio) 20783f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 20793f2304f8SSagi Grimberg 20803f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 20813f2304f8SSagi Grimberg pdu->hdr.flags = 0; 20823f2304f8SSagi Grimberg if (queue->hdr_digest) 20833f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 20843f2304f8SSagi Grimberg if (queue->data_digest && req->pdu_len) { 20853f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_DDGST; 20863f2304f8SSagi Grimberg ddgst = nvme_tcp_ddgst_len(queue); 20873f2304f8SSagi Grimberg } 20883f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 20893f2304f8SSagi Grimberg pdu->hdr.pdo = req->pdu_len ? pdu->hdr.hlen + hdgst : 0; 20903f2304f8SSagi Grimberg pdu->hdr.plen = 20913f2304f8SSagi Grimberg cpu_to_le32(pdu->hdr.hlen + hdgst + req->pdu_len + ddgst); 20923f2304f8SSagi Grimberg 20933f2304f8SSagi Grimberg ret = nvme_tcp_map_data(queue, rq); 20943f2304f8SSagi Grimberg if (unlikely(ret)) { 20953f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 20963f2304f8SSagi Grimberg "Failed to map data (%d)\n", ret); 20973f2304f8SSagi Grimberg return ret; 20983f2304f8SSagi Grimberg } 20993f2304f8SSagi Grimberg 21003f2304f8SSagi Grimberg return 0; 21013f2304f8SSagi Grimberg } 21023f2304f8SSagi Grimberg 21033f2304f8SSagi Grimberg static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx, 21043f2304f8SSagi Grimberg const struct blk_mq_queue_data *bd) 21053f2304f8SSagi Grimberg { 21063f2304f8SSagi Grimberg struct nvme_ns *ns = hctx->queue->queuedata; 21073f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 21083f2304f8SSagi Grimberg struct request *rq = bd->rq; 21093f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 21103f2304f8SSagi Grimberg bool queue_ready = test_bit(NVME_TCP_Q_LIVE, &queue->flags); 21113f2304f8SSagi Grimberg blk_status_t ret; 21123f2304f8SSagi Grimberg 21133f2304f8SSagi Grimberg if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) 21143f2304f8SSagi Grimberg return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq); 21153f2304f8SSagi Grimberg 21163f2304f8SSagi Grimberg ret = nvme_tcp_setup_cmd_pdu(ns, rq); 21173f2304f8SSagi Grimberg if (unlikely(ret)) 21183f2304f8SSagi Grimberg return ret; 21193f2304f8SSagi Grimberg 21203f2304f8SSagi Grimberg blk_mq_start_request(rq); 21213f2304f8SSagi Grimberg 21223f2304f8SSagi Grimberg nvme_tcp_queue_request(req); 21233f2304f8SSagi Grimberg 21243f2304f8SSagi Grimberg return BLK_STS_OK; 21253f2304f8SSagi Grimberg } 21263f2304f8SSagi Grimberg 2127873946f4SSagi Grimberg static int nvme_tcp_map_queues(struct blk_mq_tag_set *set) 2128873946f4SSagi Grimberg { 2129873946f4SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 213064861993SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 2131873946f4SSagi Grimberg 213264861993SSagi Grimberg if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) { 2133873946f4SSagi Grimberg /* separate read/write queues */ 2134873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 213564861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 213664861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 213764861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 213864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 2139873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 214064861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2141873946f4SSagi Grimberg } else { 214264861993SSagi Grimberg /* shared read/write queues */ 2143873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 214464861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 214564861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 214664861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 214764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2148873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 0; 2149873946f4SSagi Grimberg } 2150873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); 2151873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); 215264861993SSagi Grimberg 215364861993SSagi Grimberg dev_info(ctrl->ctrl.device, 215464861993SSagi Grimberg "mapped %d/%d default/read queues.\n", 215564861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT], 215664861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]); 215764861993SSagi Grimberg 2158873946f4SSagi Grimberg return 0; 2159873946f4SSagi Grimberg } 2160873946f4SSagi Grimberg 21613f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_mq_ops = { 21623f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 21633f2304f8SSagi Grimberg .complete = nvme_complete_rq, 21643f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 21653f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 21663f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_hctx, 21673f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 2168873946f4SSagi Grimberg .map_queues = nvme_tcp_map_queues, 21693f2304f8SSagi Grimberg }; 21703f2304f8SSagi Grimberg 21713f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_admin_mq_ops = { 21723f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 21733f2304f8SSagi Grimberg .complete = nvme_complete_rq, 21743f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 21753f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 21763f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_admin_hctx, 21773f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 21783f2304f8SSagi Grimberg }; 21793f2304f8SSagi Grimberg 21803f2304f8SSagi Grimberg static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = { 21813f2304f8SSagi Grimberg .name = "tcp", 21823f2304f8SSagi Grimberg .module = THIS_MODULE, 21833f2304f8SSagi Grimberg .flags = NVME_F_FABRICS, 21843f2304f8SSagi Grimberg .reg_read32 = nvmf_reg_read32, 21853f2304f8SSagi Grimberg .reg_read64 = nvmf_reg_read64, 21863f2304f8SSagi Grimberg .reg_write32 = nvmf_reg_write32, 21873f2304f8SSagi Grimberg .free_ctrl = nvme_tcp_free_ctrl, 21883f2304f8SSagi Grimberg .submit_async_event = nvme_tcp_submit_async_event, 21893f2304f8SSagi Grimberg .delete_ctrl = nvme_tcp_delete_ctrl, 21903f2304f8SSagi Grimberg .get_address = nvmf_get_address, 21913f2304f8SSagi Grimberg }; 21923f2304f8SSagi Grimberg 21933f2304f8SSagi Grimberg static bool 21943f2304f8SSagi Grimberg nvme_tcp_existing_controller(struct nvmf_ctrl_options *opts) 21953f2304f8SSagi Grimberg { 21963f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 21973f2304f8SSagi Grimberg bool found = false; 21983f2304f8SSagi Grimberg 21993f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 22003f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) { 22013f2304f8SSagi Grimberg found = nvmf_ip_options_match(&ctrl->ctrl, opts); 22023f2304f8SSagi Grimberg if (found) 22033f2304f8SSagi Grimberg break; 22043f2304f8SSagi Grimberg } 22053f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 22063f2304f8SSagi Grimberg 22073f2304f8SSagi Grimberg return found; 22083f2304f8SSagi Grimberg } 22093f2304f8SSagi Grimberg 22103f2304f8SSagi Grimberg static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, 22113f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts) 22123f2304f8SSagi Grimberg { 22133f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 22143f2304f8SSagi Grimberg int ret; 22153f2304f8SSagi Grimberg 22163f2304f8SSagi Grimberg ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 22173f2304f8SSagi Grimberg if (!ctrl) 22183f2304f8SSagi Grimberg return ERR_PTR(-ENOMEM); 22193f2304f8SSagi Grimberg 22203f2304f8SSagi Grimberg INIT_LIST_HEAD(&ctrl->list); 22213f2304f8SSagi Grimberg ctrl->ctrl.opts = opts; 2222873946f4SSagi Grimberg ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 1; 22233f2304f8SSagi Grimberg ctrl->ctrl.sqsize = opts->queue_size - 1; 22243f2304f8SSagi Grimberg ctrl->ctrl.kato = opts->kato; 22253f2304f8SSagi Grimberg 22263f2304f8SSagi Grimberg INIT_DELAYED_WORK(&ctrl->connect_work, 22273f2304f8SSagi Grimberg nvme_tcp_reconnect_ctrl_work); 22283f2304f8SSagi Grimberg INIT_WORK(&ctrl->err_work, nvme_tcp_error_recovery_work); 22293f2304f8SSagi Grimberg INIT_WORK(&ctrl->ctrl.reset_work, nvme_reset_ctrl_work); 22303f2304f8SSagi Grimberg 22313f2304f8SSagi Grimberg if (!(opts->mask & NVMF_OPT_TRSVCID)) { 22323f2304f8SSagi Grimberg opts->trsvcid = 22333f2304f8SSagi Grimberg kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); 22343f2304f8SSagi Grimberg if (!opts->trsvcid) { 22353f2304f8SSagi Grimberg ret = -ENOMEM; 22363f2304f8SSagi Grimberg goto out_free_ctrl; 22373f2304f8SSagi Grimberg } 22383f2304f8SSagi Grimberg opts->mask |= NVMF_OPT_TRSVCID; 22393f2304f8SSagi Grimberg } 22403f2304f8SSagi Grimberg 22413f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 22423f2304f8SSagi Grimberg opts->traddr, opts->trsvcid, &ctrl->addr); 22433f2304f8SSagi Grimberg if (ret) { 22443f2304f8SSagi Grimberg pr_err("malformed address passed: %s:%s\n", 22453f2304f8SSagi Grimberg opts->traddr, opts->trsvcid); 22463f2304f8SSagi Grimberg goto out_free_ctrl; 22473f2304f8SSagi Grimberg } 22483f2304f8SSagi Grimberg 22493f2304f8SSagi Grimberg if (opts->mask & NVMF_OPT_HOST_TRADDR) { 22503f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 22513f2304f8SSagi Grimberg opts->host_traddr, NULL, &ctrl->src_addr); 22523f2304f8SSagi Grimberg if (ret) { 22533f2304f8SSagi Grimberg pr_err("malformed src address passed: %s\n", 22543f2304f8SSagi Grimberg opts->host_traddr); 22553f2304f8SSagi Grimberg goto out_free_ctrl; 22563f2304f8SSagi Grimberg } 22573f2304f8SSagi Grimberg } 22583f2304f8SSagi Grimberg 22593f2304f8SSagi Grimberg if (!opts->duplicate_connect && nvme_tcp_existing_controller(opts)) { 22603f2304f8SSagi Grimberg ret = -EALREADY; 22613f2304f8SSagi Grimberg goto out_free_ctrl; 22623f2304f8SSagi Grimberg } 22633f2304f8SSagi Grimberg 2264873946f4SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues), 22653f2304f8SSagi Grimberg GFP_KERNEL); 22663f2304f8SSagi Grimberg if (!ctrl->queues) { 22673f2304f8SSagi Grimberg ret = -ENOMEM; 22683f2304f8SSagi Grimberg goto out_free_ctrl; 22693f2304f8SSagi Grimberg } 22703f2304f8SSagi Grimberg 22713f2304f8SSagi Grimberg ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_tcp_ctrl_ops, 0); 22723f2304f8SSagi Grimberg if (ret) 22733f2304f8SSagi Grimberg goto out_kfree_queues; 22743f2304f8SSagi Grimberg 22753f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { 22763f2304f8SSagi Grimberg WARN_ON_ONCE(1); 22773f2304f8SSagi Grimberg ret = -EINTR; 22783f2304f8SSagi Grimberg goto out_uninit_ctrl; 22793f2304f8SSagi Grimberg } 22803f2304f8SSagi Grimberg 22813f2304f8SSagi Grimberg ret = nvme_tcp_setup_ctrl(&ctrl->ctrl, true); 22823f2304f8SSagi Grimberg if (ret) 22833f2304f8SSagi Grimberg goto out_uninit_ctrl; 22843f2304f8SSagi Grimberg 22853f2304f8SSagi Grimberg dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n", 22863f2304f8SSagi Grimberg ctrl->ctrl.opts->subsysnqn, &ctrl->addr); 22873f2304f8SSagi Grimberg 22883f2304f8SSagi Grimberg nvme_get_ctrl(&ctrl->ctrl); 22893f2304f8SSagi Grimberg 22903f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 22913f2304f8SSagi Grimberg list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list); 22923f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 22933f2304f8SSagi Grimberg 22943f2304f8SSagi Grimberg return &ctrl->ctrl; 22953f2304f8SSagi Grimberg 22963f2304f8SSagi Grimberg out_uninit_ctrl: 22973f2304f8SSagi Grimberg nvme_uninit_ctrl(&ctrl->ctrl); 22983f2304f8SSagi Grimberg nvme_put_ctrl(&ctrl->ctrl); 22993f2304f8SSagi Grimberg if (ret > 0) 23003f2304f8SSagi Grimberg ret = -EIO; 23013f2304f8SSagi Grimberg return ERR_PTR(ret); 23023f2304f8SSagi Grimberg out_kfree_queues: 23033f2304f8SSagi Grimberg kfree(ctrl->queues); 23043f2304f8SSagi Grimberg out_free_ctrl: 23053f2304f8SSagi Grimberg kfree(ctrl); 23063f2304f8SSagi Grimberg return ERR_PTR(ret); 23073f2304f8SSagi Grimberg } 23083f2304f8SSagi Grimberg 23093f2304f8SSagi Grimberg static struct nvmf_transport_ops nvme_tcp_transport = { 23103f2304f8SSagi Grimberg .name = "tcp", 23113f2304f8SSagi Grimberg .module = THIS_MODULE, 23123f2304f8SSagi Grimberg .required_opts = NVMF_OPT_TRADDR, 23133f2304f8SSagi Grimberg .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY | 23143f2304f8SSagi Grimberg NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | 2315873946f4SSagi Grimberg NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | 2316873946f4SSagi Grimberg NVMF_OPT_NR_WRITE_QUEUES, 23173f2304f8SSagi Grimberg .create_ctrl = nvme_tcp_create_ctrl, 23183f2304f8SSagi Grimberg }; 23193f2304f8SSagi Grimberg 23203f2304f8SSagi Grimberg static int __init nvme_tcp_init_module(void) 23213f2304f8SSagi Grimberg { 23223f2304f8SSagi Grimberg nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", 23233f2304f8SSagi Grimberg WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); 23243f2304f8SSagi Grimberg if (!nvme_tcp_wq) 23253f2304f8SSagi Grimberg return -ENOMEM; 23263f2304f8SSagi Grimberg 23273f2304f8SSagi Grimberg nvmf_register_transport(&nvme_tcp_transport); 23283f2304f8SSagi Grimberg return 0; 23293f2304f8SSagi Grimberg } 23303f2304f8SSagi Grimberg 23313f2304f8SSagi Grimberg static void __exit nvme_tcp_cleanup_module(void) 23323f2304f8SSagi Grimberg { 23333f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 23343f2304f8SSagi Grimberg 23353f2304f8SSagi Grimberg nvmf_unregister_transport(&nvme_tcp_transport); 23363f2304f8SSagi Grimberg 23373f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 23383f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) 23393f2304f8SSagi Grimberg nvme_delete_ctrl(&ctrl->ctrl); 23403f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 23413f2304f8SSagi Grimberg flush_workqueue(nvme_delete_wq); 23423f2304f8SSagi Grimberg 23433f2304f8SSagi Grimberg destroy_workqueue(nvme_tcp_wq); 23443f2304f8SSagi Grimberg } 23453f2304f8SSagi Grimberg 23463f2304f8SSagi Grimberg module_init(nvme_tcp_init_module); 23473f2304f8SSagi Grimberg module_exit(nvme_tcp_cleanup_module); 23483f2304f8SSagi Grimberg 23493f2304f8SSagi Grimberg MODULE_LICENSE("GPL v2"); 2350