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> 161a9460ceSSagi Grimberg #include <net/busy_poll.h> 173f2304f8SSagi Grimberg 183f2304f8SSagi Grimberg #include "nvme.h" 193f2304f8SSagi Grimberg #include "fabrics.h" 203f2304f8SSagi Grimberg 213f2304f8SSagi Grimberg struct nvme_tcp_queue; 223f2304f8SSagi Grimberg 239912ade3SWunderlich, Mark /* Define the socket priority to use for connections were it is desirable 249912ade3SWunderlich, Mark * that the NIC consider performing optimized packet processing or filtering. 259912ade3SWunderlich, Mark * A non-zero value being sufficient to indicate general consideration of any 269912ade3SWunderlich, Mark * possible optimization. Making it a module param allows for alternative 279912ade3SWunderlich, Mark * values that may be unique for some NIC implementations. 289912ade3SWunderlich, Mark */ 299912ade3SWunderlich, Mark static int so_priority; 309912ade3SWunderlich, Mark module_param(so_priority, int, 0644); 319912ade3SWunderlich, Mark MODULE_PARM_DESC(so_priority, "nvme tcp socket optimize priority"); 329912ade3SWunderlich, Mark 333f2304f8SSagi Grimberg enum nvme_tcp_send_state { 343f2304f8SSagi Grimberg NVME_TCP_SEND_CMD_PDU = 0, 353f2304f8SSagi Grimberg NVME_TCP_SEND_H2C_PDU, 363f2304f8SSagi Grimberg NVME_TCP_SEND_DATA, 373f2304f8SSagi Grimberg NVME_TCP_SEND_DDGST, 383f2304f8SSagi Grimberg }; 393f2304f8SSagi Grimberg 403f2304f8SSagi Grimberg struct nvme_tcp_request { 413f2304f8SSagi Grimberg struct nvme_request req; 423f2304f8SSagi Grimberg void *pdu; 433f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 443f2304f8SSagi Grimberg u32 data_len; 453f2304f8SSagi Grimberg u32 pdu_len; 463f2304f8SSagi Grimberg u32 pdu_sent; 473f2304f8SSagi Grimberg u16 ttag; 483f2304f8SSagi Grimberg struct list_head entry; 4915ec928aSSagi Grimberg struct llist_node lentry; 50a7273d40SChristoph Hellwig __le32 ddgst; 513f2304f8SSagi Grimberg 523f2304f8SSagi Grimberg struct bio *curr_bio; 533f2304f8SSagi Grimberg struct iov_iter iter; 543f2304f8SSagi Grimberg 553f2304f8SSagi Grimberg /* send state */ 563f2304f8SSagi Grimberg size_t offset; 573f2304f8SSagi Grimberg size_t data_sent; 583f2304f8SSagi Grimberg enum nvme_tcp_send_state state; 593f2304f8SSagi Grimberg }; 603f2304f8SSagi Grimberg 613f2304f8SSagi Grimberg enum nvme_tcp_queue_flags { 623f2304f8SSagi Grimberg NVME_TCP_Q_ALLOCATED = 0, 633f2304f8SSagi Grimberg NVME_TCP_Q_LIVE = 1, 6472e5d757SSagi Grimberg NVME_TCP_Q_POLLING = 2, 653f2304f8SSagi Grimberg }; 663f2304f8SSagi Grimberg 673f2304f8SSagi Grimberg enum nvme_tcp_recv_state { 683f2304f8SSagi Grimberg NVME_TCP_RECV_PDU = 0, 693f2304f8SSagi Grimberg NVME_TCP_RECV_DATA, 703f2304f8SSagi Grimberg NVME_TCP_RECV_DDGST, 713f2304f8SSagi Grimberg }; 723f2304f8SSagi Grimberg 733f2304f8SSagi Grimberg struct nvme_tcp_ctrl; 743f2304f8SSagi Grimberg struct nvme_tcp_queue { 753f2304f8SSagi Grimberg struct socket *sock; 763f2304f8SSagi Grimberg struct work_struct io_work; 773f2304f8SSagi Grimberg int io_cpu; 783f2304f8SSagi Grimberg 79db5ad6b7SSagi Grimberg struct mutex send_mutex; 8015ec928aSSagi Grimberg struct llist_head req_list; 813f2304f8SSagi Grimberg struct list_head send_list; 82122e5b9fSSagi Grimberg bool more_requests; 833f2304f8SSagi Grimberg 843f2304f8SSagi Grimberg /* recv state */ 853f2304f8SSagi Grimberg void *pdu; 863f2304f8SSagi Grimberg int pdu_remaining; 873f2304f8SSagi Grimberg int pdu_offset; 883f2304f8SSagi Grimberg size_t data_remaining; 893f2304f8SSagi Grimberg size_t ddgst_remaining; 901a9460ceSSagi Grimberg unsigned int nr_cqe; 913f2304f8SSagi Grimberg 923f2304f8SSagi Grimberg /* send state */ 933f2304f8SSagi Grimberg struct nvme_tcp_request *request; 943f2304f8SSagi Grimberg 953f2304f8SSagi Grimberg int queue_size; 963f2304f8SSagi Grimberg size_t cmnd_capsule_len; 973f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 983f2304f8SSagi Grimberg unsigned long flags; 993f2304f8SSagi Grimberg bool rd_enabled; 1003f2304f8SSagi Grimberg 1013f2304f8SSagi Grimberg bool hdr_digest; 1023f2304f8SSagi Grimberg bool data_digest; 1033f2304f8SSagi Grimberg struct ahash_request *rcv_hash; 1043f2304f8SSagi Grimberg struct ahash_request *snd_hash; 1053f2304f8SSagi Grimberg __le32 exp_ddgst; 1063f2304f8SSagi Grimberg __le32 recv_ddgst; 1073f2304f8SSagi Grimberg 1083f2304f8SSagi Grimberg struct page_frag_cache pf_cache; 1093f2304f8SSagi Grimberg 1103f2304f8SSagi Grimberg void (*state_change)(struct sock *); 1113f2304f8SSagi Grimberg void (*data_ready)(struct sock *); 1123f2304f8SSagi Grimberg void (*write_space)(struct sock *); 1133f2304f8SSagi Grimberg }; 1143f2304f8SSagi Grimberg 1153f2304f8SSagi Grimberg struct nvme_tcp_ctrl { 1163f2304f8SSagi Grimberg /* read only in the hot path */ 1173f2304f8SSagi Grimberg struct nvme_tcp_queue *queues; 1183f2304f8SSagi Grimberg struct blk_mq_tag_set tag_set; 1193f2304f8SSagi Grimberg 1203f2304f8SSagi Grimberg /* other member variables */ 1213f2304f8SSagi Grimberg struct list_head list; 1223f2304f8SSagi Grimberg struct blk_mq_tag_set admin_tag_set; 1233f2304f8SSagi Grimberg struct sockaddr_storage addr; 1243f2304f8SSagi Grimberg struct sockaddr_storage src_addr; 1253f2304f8SSagi Grimberg struct nvme_ctrl ctrl; 1263f2304f8SSagi Grimberg 127d4d61470SSagi Grimberg struct mutex teardown_lock; 1283f2304f8SSagi Grimberg struct work_struct err_work; 1293f2304f8SSagi Grimberg struct delayed_work connect_work; 1303f2304f8SSagi Grimberg struct nvme_tcp_request async_req; 13164861993SSagi Grimberg u32 io_queues[HCTX_MAX_TYPES]; 1323f2304f8SSagi Grimberg }; 1333f2304f8SSagi Grimberg 1343f2304f8SSagi Grimberg static LIST_HEAD(nvme_tcp_ctrl_list); 1353f2304f8SSagi Grimberg static DEFINE_MUTEX(nvme_tcp_ctrl_mutex); 1363f2304f8SSagi Grimberg static struct workqueue_struct *nvme_tcp_wq; 1376acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_mq_ops; 1386acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_admin_mq_ops; 139db5ad6b7SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue); 1403f2304f8SSagi Grimberg 1413f2304f8SSagi Grimberg static inline struct nvme_tcp_ctrl *to_tcp_ctrl(struct nvme_ctrl *ctrl) 1423f2304f8SSagi Grimberg { 1433f2304f8SSagi Grimberg return container_of(ctrl, struct nvme_tcp_ctrl, ctrl); 1443f2304f8SSagi Grimberg } 1453f2304f8SSagi Grimberg 1463f2304f8SSagi Grimberg static inline int nvme_tcp_queue_id(struct nvme_tcp_queue *queue) 1473f2304f8SSagi Grimberg { 1483f2304f8SSagi Grimberg return queue - queue->ctrl->queues; 1493f2304f8SSagi Grimberg } 1503f2304f8SSagi Grimberg 1513f2304f8SSagi Grimberg static inline struct blk_mq_tags *nvme_tcp_tagset(struct nvme_tcp_queue *queue) 1523f2304f8SSagi Grimberg { 1533f2304f8SSagi Grimberg u32 queue_idx = nvme_tcp_queue_id(queue); 1543f2304f8SSagi Grimberg 1553f2304f8SSagi Grimberg if (queue_idx == 0) 1563f2304f8SSagi Grimberg return queue->ctrl->admin_tag_set.tags[queue_idx]; 1573f2304f8SSagi Grimberg return queue->ctrl->tag_set.tags[queue_idx - 1]; 1583f2304f8SSagi Grimberg } 1593f2304f8SSagi Grimberg 1603f2304f8SSagi Grimberg static inline u8 nvme_tcp_hdgst_len(struct nvme_tcp_queue *queue) 1613f2304f8SSagi Grimberg { 1623f2304f8SSagi Grimberg return queue->hdr_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1633f2304f8SSagi Grimberg } 1643f2304f8SSagi Grimberg 1653f2304f8SSagi Grimberg static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue) 1663f2304f8SSagi Grimberg { 1673f2304f8SSagi Grimberg return queue->data_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1683f2304f8SSagi Grimberg } 1693f2304f8SSagi Grimberg 1703f2304f8SSagi Grimberg static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_queue *queue) 1713f2304f8SSagi Grimberg { 1723f2304f8SSagi Grimberg return queue->cmnd_capsule_len - sizeof(struct nvme_command); 1733f2304f8SSagi Grimberg } 1743f2304f8SSagi Grimberg 1753f2304f8SSagi Grimberg static inline bool nvme_tcp_async_req(struct nvme_tcp_request *req) 1763f2304f8SSagi Grimberg { 1773f2304f8SSagi Grimberg return req == &req->queue->ctrl->async_req; 1783f2304f8SSagi Grimberg } 1793f2304f8SSagi Grimberg 1803f2304f8SSagi Grimberg static inline bool nvme_tcp_has_inline_data(struct nvme_tcp_request *req) 1813f2304f8SSagi Grimberg { 1823f2304f8SSagi Grimberg struct request *rq; 1833f2304f8SSagi Grimberg 1843f2304f8SSagi Grimberg if (unlikely(nvme_tcp_async_req(req))) 1853f2304f8SSagi Grimberg return false; /* async events don't have a request */ 1863f2304f8SSagi Grimberg 1873f2304f8SSagi Grimberg rq = blk_mq_rq_from_pdu(req); 1883f2304f8SSagi Grimberg 18925e5cb78SSagi Grimberg return rq_data_dir(rq) == WRITE && req->data_len && 19025e5cb78SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(req->queue); 1913f2304f8SSagi Grimberg } 1923f2304f8SSagi Grimberg 1933f2304f8SSagi Grimberg static inline struct page *nvme_tcp_req_cur_page(struct nvme_tcp_request *req) 1943f2304f8SSagi Grimberg { 1953f2304f8SSagi Grimberg return req->iter.bvec->bv_page; 1963f2304f8SSagi Grimberg } 1973f2304f8SSagi Grimberg 1983f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_offset(struct nvme_tcp_request *req) 1993f2304f8SSagi Grimberg { 2003f2304f8SSagi Grimberg return req->iter.bvec->bv_offset + req->iter.iov_offset; 2013f2304f8SSagi Grimberg } 2023f2304f8SSagi Grimberg 2033f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_length(struct nvme_tcp_request *req) 2043f2304f8SSagi Grimberg { 2053f2304f8SSagi Grimberg return min_t(size_t, req->iter.bvec->bv_len - req->iter.iov_offset, 2063f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent); 2073f2304f8SSagi Grimberg } 2083f2304f8SSagi Grimberg 2093f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_offset(struct nvme_tcp_request *req) 2103f2304f8SSagi Grimberg { 2113f2304f8SSagi Grimberg return req->iter.iov_offset; 2123f2304f8SSagi Grimberg } 2133f2304f8SSagi Grimberg 2143f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_data_left(struct nvme_tcp_request *req) 2153f2304f8SSagi Grimberg { 2163f2304f8SSagi Grimberg return rq_data_dir(blk_mq_rq_from_pdu(req)) == WRITE ? 2173f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent : 0; 2183f2304f8SSagi Grimberg } 2193f2304f8SSagi Grimberg 2203f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_last_send(struct nvme_tcp_request *req, 2213f2304f8SSagi Grimberg int len) 2223f2304f8SSagi Grimberg { 2233f2304f8SSagi Grimberg return nvme_tcp_pdu_data_left(req) <= len; 2243f2304f8SSagi Grimberg } 2253f2304f8SSagi Grimberg 2263f2304f8SSagi Grimberg static void nvme_tcp_init_iter(struct nvme_tcp_request *req, 2273f2304f8SSagi Grimberg unsigned int dir) 2283f2304f8SSagi Grimberg { 2293f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 2303f2304f8SSagi Grimberg struct bio_vec *vec; 2313f2304f8SSagi Grimberg unsigned int size; 2323f2304f8SSagi Grimberg int nsegs; 2333f2304f8SSagi Grimberg size_t offset; 2343f2304f8SSagi Grimberg 2353f2304f8SSagi Grimberg if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) { 2363f2304f8SSagi Grimberg vec = &rq->special_vec; 2373f2304f8SSagi Grimberg nsegs = 1; 2383f2304f8SSagi Grimberg size = blk_rq_payload_bytes(rq); 2393f2304f8SSagi Grimberg offset = 0; 2403f2304f8SSagi Grimberg } else { 2413f2304f8SSagi Grimberg struct bio *bio = req->curr_bio; 2423f2304f8SSagi Grimberg 2433f2304f8SSagi Grimberg vec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); 2443f2304f8SSagi Grimberg nsegs = bio_segments(bio); 2453f2304f8SSagi Grimberg size = bio->bi_iter.bi_size; 2463f2304f8SSagi Grimberg offset = bio->bi_iter.bi_bvec_done; 2473f2304f8SSagi Grimberg } 2483f2304f8SSagi Grimberg 2493f2304f8SSagi Grimberg iov_iter_bvec(&req->iter, dir, vec, nsegs, size); 2503f2304f8SSagi Grimberg req->iter.iov_offset = offset; 2513f2304f8SSagi Grimberg } 2523f2304f8SSagi Grimberg 2533f2304f8SSagi Grimberg static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req, 2543f2304f8SSagi Grimberg int len) 2553f2304f8SSagi Grimberg { 2563f2304f8SSagi Grimberg req->data_sent += len; 2573f2304f8SSagi Grimberg req->pdu_sent += len; 2583f2304f8SSagi Grimberg iov_iter_advance(&req->iter, len); 2593f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter) && 2603f2304f8SSagi Grimberg req->data_sent < req->data_len) { 2613f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 2623f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 2633f2304f8SSagi Grimberg } 2643f2304f8SSagi Grimberg } 2653f2304f8SSagi Grimberg 266db5ad6b7SSagi Grimberg static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req, 26786f0348aSSagi Grimberg bool sync, bool last) 2683f2304f8SSagi Grimberg { 2693f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 270db5ad6b7SSagi Grimberg bool empty; 2713f2304f8SSagi Grimberg 27215ec928aSSagi Grimberg empty = llist_add(&req->lentry, &queue->req_list) && 27315ec928aSSagi Grimberg list_empty(&queue->send_list) && !queue->request; 2743f2304f8SSagi Grimberg 275db5ad6b7SSagi Grimberg /* 276db5ad6b7SSagi Grimberg * if we're the first on the send_list and we can try to send 277db5ad6b7SSagi Grimberg * directly, otherwise queue io_work. Also, only do that if we 278db5ad6b7SSagi Grimberg * are on the same cpu, so we don't introduce contention. 279db5ad6b7SSagi Grimberg */ 280db5ad6b7SSagi Grimberg if (queue->io_cpu == smp_processor_id() && 281db5ad6b7SSagi Grimberg sync && empty && mutex_trylock(&queue->send_mutex)) { 282122e5b9fSSagi Grimberg queue->more_requests = !last; 283db5ad6b7SSagi Grimberg nvme_tcp_try_send(queue); 284122e5b9fSSagi Grimberg queue->more_requests = false; 285db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 28686f0348aSSagi Grimberg } else if (last) { 2873f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 2883f2304f8SSagi Grimberg } 289db5ad6b7SSagi Grimberg } 2903f2304f8SSagi Grimberg 29115ec928aSSagi Grimberg static void nvme_tcp_process_req_list(struct nvme_tcp_queue *queue) 29215ec928aSSagi Grimberg { 29315ec928aSSagi Grimberg struct nvme_tcp_request *req; 29415ec928aSSagi Grimberg struct llist_node *node; 29515ec928aSSagi Grimberg 29615ec928aSSagi Grimberg for (node = llist_del_all(&queue->req_list); node; node = node->next) { 29715ec928aSSagi Grimberg req = llist_entry(node, struct nvme_tcp_request, lentry); 29815ec928aSSagi Grimberg list_add(&req->entry, &queue->send_list); 29915ec928aSSagi Grimberg } 30015ec928aSSagi Grimberg } 30115ec928aSSagi Grimberg 3023f2304f8SSagi Grimberg static inline struct nvme_tcp_request * 3033f2304f8SSagi Grimberg nvme_tcp_fetch_request(struct nvme_tcp_queue *queue) 3043f2304f8SSagi Grimberg { 3053f2304f8SSagi Grimberg struct nvme_tcp_request *req; 3063f2304f8SSagi Grimberg 3073f2304f8SSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 3083f2304f8SSagi Grimberg struct nvme_tcp_request, entry); 30915ec928aSSagi Grimberg if (!req) { 31015ec928aSSagi Grimberg nvme_tcp_process_req_list(queue); 31115ec928aSSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 31215ec928aSSagi Grimberg struct nvme_tcp_request, entry); 31315ec928aSSagi Grimberg if (unlikely(!req)) 31415ec928aSSagi Grimberg return NULL; 31515ec928aSSagi Grimberg } 3163f2304f8SSagi Grimberg 31715ec928aSSagi Grimberg list_del(&req->entry); 3183f2304f8SSagi Grimberg return req; 3193f2304f8SSagi Grimberg } 3203f2304f8SSagi Grimberg 321a7273d40SChristoph Hellwig static inline void nvme_tcp_ddgst_final(struct ahash_request *hash, 322a7273d40SChristoph Hellwig __le32 *dgst) 3233f2304f8SSagi Grimberg { 3243f2304f8SSagi Grimberg ahash_request_set_crypt(hash, NULL, (u8 *)dgst, 0); 3253f2304f8SSagi Grimberg crypto_ahash_final(hash); 3263f2304f8SSagi Grimberg } 3273f2304f8SSagi Grimberg 3283f2304f8SSagi Grimberg static inline void nvme_tcp_ddgst_update(struct ahash_request *hash, 3293f2304f8SSagi Grimberg struct page *page, off_t off, size_t len) 3303f2304f8SSagi Grimberg { 3313f2304f8SSagi Grimberg struct scatterlist sg; 3323f2304f8SSagi Grimberg 3333f2304f8SSagi Grimberg sg_init_marker(&sg, 1); 3343f2304f8SSagi Grimberg sg_set_page(&sg, page, len, off); 3353f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, NULL, len); 3363f2304f8SSagi Grimberg crypto_ahash_update(hash); 3373f2304f8SSagi Grimberg } 3383f2304f8SSagi Grimberg 3393f2304f8SSagi Grimberg static inline void nvme_tcp_hdgst(struct ahash_request *hash, 3403f2304f8SSagi Grimberg void *pdu, size_t len) 3413f2304f8SSagi Grimberg { 3423f2304f8SSagi Grimberg struct scatterlist sg; 3433f2304f8SSagi Grimberg 3443f2304f8SSagi Grimberg sg_init_one(&sg, pdu, len); 3453f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, pdu + len, len); 3463f2304f8SSagi Grimberg crypto_ahash_digest(hash); 3473f2304f8SSagi Grimberg } 3483f2304f8SSagi Grimberg 3493f2304f8SSagi Grimberg static int nvme_tcp_verify_hdgst(struct nvme_tcp_queue *queue, 3503f2304f8SSagi Grimberg void *pdu, size_t pdu_len) 3513f2304f8SSagi Grimberg { 3523f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3533f2304f8SSagi Grimberg __le32 recv_digest; 3543f2304f8SSagi Grimberg __le32 exp_digest; 3553f2304f8SSagi Grimberg 3563f2304f8SSagi Grimberg if (unlikely(!(hdr->flags & NVME_TCP_F_HDGST))) { 3573f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3583f2304f8SSagi Grimberg "queue %d: header digest flag is cleared\n", 3593f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3603f2304f8SSagi Grimberg return -EPROTO; 3613f2304f8SSagi Grimberg } 3623f2304f8SSagi Grimberg 3633f2304f8SSagi Grimberg recv_digest = *(__le32 *)(pdu + hdr->hlen); 3643f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->rcv_hash, pdu, pdu_len); 3653f2304f8SSagi Grimberg exp_digest = *(__le32 *)(pdu + hdr->hlen); 3663f2304f8SSagi Grimberg if (recv_digest != exp_digest) { 3673f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3683f2304f8SSagi Grimberg "header digest error: recv %#x expected %#x\n", 3693f2304f8SSagi Grimberg le32_to_cpu(recv_digest), le32_to_cpu(exp_digest)); 3703f2304f8SSagi Grimberg return -EIO; 3713f2304f8SSagi Grimberg } 3723f2304f8SSagi Grimberg 3733f2304f8SSagi Grimberg return 0; 3743f2304f8SSagi Grimberg } 3753f2304f8SSagi Grimberg 3763f2304f8SSagi Grimberg static int nvme_tcp_check_ddgst(struct nvme_tcp_queue *queue, void *pdu) 3773f2304f8SSagi Grimberg { 3783f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3793f2304f8SSagi Grimberg u8 digest_len = nvme_tcp_hdgst_len(queue); 3803f2304f8SSagi Grimberg u32 len; 3813f2304f8SSagi Grimberg 3823f2304f8SSagi Grimberg len = le32_to_cpu(hdr->plen) - hdr->hlen - 3833f2304f8SSagi Grimberg ((hdr->flags & NVME_TCP_F_HDGST) ? digest_len : 0); 3843f2304f8SSagi Grimberg 3853f2304f8SSagi Grimberg if (unlikely(len && !(hdr->flags & NVME_TCP_F_DDGST))) { 3863f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3873f2304f8SSagi Grimberg "queue %d: data digest flag is cleared\n", 3883f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3893f2304f8SSagi Grimberg return -EPROTO; 3903f2304f8SSagi Grimberg } 3913f2304f8SSagi Grimberg crypto_ahash_init(queue->rcv_hash); 3923f2304f8SSagi Grimberg 3933f2304f8SSagi Grimberg return 0; 3943f2304f8SSagi Grimberg } 3953f2304f8SSagi Grimberg 3963f2304f8SSagi Grimberg static void nvme_tcp_exit_request(struct blk_mq_tag_set *set, 3973f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx) 3983f2304f8SSagi Grimberg { 3993f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 4003f2304f8SSagi Grimberg 4013f2304f8SSagi Grimberg page_frag_free(req->pdu); 4023f2304f8SSagi Grimberg } 4033f2304f8SSagi Grimberg 4043f2304f8SSagi Grimberg static int nvme_tcp_init_request(struct blk_mq_tag_set *set, 4053f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx, 4063f2304f8SSagi Grimberg unsigned int numa_node) 4073f2304f8SSagi Grimberg { 4083f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 4093f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 4103f2304f8SSagi Grimberg int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 4113f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx]; 4123f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 4133f2304f8SSagi Grimberg 4143f2304f8SSagi Grimberg req->pdu = page_frag_alloc(&queue->pf_cache, 4153f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 4163f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 4173f2304f8SSagi Grimberg if (!req->pdu) 4183f2304f8SSagi Grimberg return -ENOMEM; 4193f2304f8SSagi Grimberg 4203f2304f8SSagi Grimberg req->queue = queue; 4213f2304f8SSagi Grimberg nvme_req(rq)->ctrl = &ctrl->ctrl; 4223f2304f8SSagi Grimberg 4233f2304f8SSagi Grimberg return 0; 4243f2304f8SSagi Grimberg } 4253f2304f8SSagi Grimberg 4263f2304f8SSagi Grimberg static int nvme_tcp_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4273f2304f8SSagi Grimberg unsigned int hctx_idx) 4283f2304f8SSagi Grimberg { 4293f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4303f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[hctx_idx + 1]; 4313f2304f8SSagi Grimberg 4323f2304f8SSagi Grimberg hctx->driver_data = queue; 4333f2304f8SSagi Grimberg return 0; 4343f2304f8SSagi Grimberg } 4353f2304f8SSagi Grimberg 4363f2304f8SSagi Grimberg static int nvme_tcp_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4373f2304f8SSagi Grimberg unsigned int hctx_idx) 4383f2304f8SSagi Grimberg { 4393f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4403f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 4413f2304f8SSagi Grimberg 4423f2304f8SSagi Grimberg hctx->driver_data = queue; 4433f2304f8SSagi Grimberg return 0; 4443f2304f8SSagi Grimberg } 4453f2304f8SSagi Grimberg 4463f2304f8SSagi Grimberg static enum nvme_tcp_recv_state 4473f2304f8SSagi Grimberg nvme_tcp_recv_state(struct nvme_tcp_queue *queue) 4483f2304f8SSagi Grimberg { 4493f2304f8SSagi Grimberg return (queue->pdu_remaining) ? NVME_TCP_RECV_PDU : 4503f2304f8SSagi Grimberg (queue->ddgst_remaining) ? NVME_TCP_RECV_DDGST : 4513f2304f8SSagi Grimberg NVME_TCP_RECV_DATA; 4523f2304f8SSagi Grimberg } 4533f2304f8SSagi Grimberg 4543f2304f8SSagi Grimberg static void nvme_tcp_init_recv_ctx(struct nvme_tcp_queue *queue) 4553f2304f8SSagi Grimberg { 4563f2304f8SSagi Grimberg queue->pdu_remaining = sizeof(struct nvme_tcp_rsp_pdu) + 4573f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 4583f2304f8SSagi Grimberg queue->pdu_offset = 0; 4593f2304f8SSagi Grimberg queue->data_remaining = -1; 4603f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 4613f2304f8SSagi Grimberg } 4623f2304f8SSagi Grimberg 4633f2304f8SSagi Grimberg static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl) 4643f2304f8SSagi Grimberg { 4653f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) 4663f2304f8SSagi Grimberg return; 4673f2304f8SSagi Grimberg 46897b2512aSNigel Kirkland queue_work(nvme_reset_wq, &to_tcp_ctrl(ctrl)->err_work); 4693f2304f8SSagi Grimberg } 4703f2304f8SSagi Grimberg 4713f2304f8SSagi Grimberg static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue, 4723f2304f8SSagi Grimberg struct nvme_completion *cqe) 4733f2304f8SSagi Grimberg { 4743f2304f8SSagi Grimberg struct request *rq; 4753f2304f8SSagi Grimberg 4763f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), cqe->command_id); 4773f2304f8SSagi Grimberg if (!rq) { 4783f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4793f2304f8SSagi Grimberg "queue %d tag 0x%x not found\n", 4803f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), cqe->command_id); 4813f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 4823f2304f8SSagi Grimberg return -EINVAL; 4833f2304f8SSagi Grimberg } 4843f2304f8SSagi Grimberg 4852eb81a33SChristoph Hellwig if (!nvme_try_complete_req(rq, cqe->status, cqe->result)) 486ff029451SChristoph Hellwig nvme_complete_rq(rq); 4871a9460ceSSagi Grimberg queue->nr_cqe++; 4883f2304f8SSagi Grimberg 4893f2304f8SSagi Grimberg return 0; 4903f2304f8SSagi Grimberg } 4913f2304f8SSagi Grimberg 4923f2304f8SSagi Grimberg static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue, 4933f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu) 4943f2304f8SSagi Grimberg { 4953f2304f8SSagi Grimberg struct request *rq; 4963f2304f8SSagi Grimberg 4973f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 4983f2304f8SSagi Grimberg if (!rq) { 4993f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5003f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 5013f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 5023f2304f8SSagi Grimberg return -ENOENT; 5033f2304f8SSagi Grimberg } 5043f2304f8SSagi Grimberg 5053f2304f8SSagi Grimberg if (!blk_rq_payload_bytes(rq)) { 5063f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5073f2304f8SSagi Grimberg "queue %d tag %#x unexpected data\n", 5083f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 5093f2304f8SSagi Grimberg return -EIO; 5103f2304f8SSagi Grimberg } 5113f2304f8SSagi Grimberg 5123f2304f8SSagi Grimberg queue->data_remaining = le32_to_cpu(pdu->data_length); 5133f2304f8SSagi Grimberg 514602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS && 515602d674cSSagi Grimberg unlikely(!(pdu->hdr.flags & NVME_TCP_F_DATA_LAST))) { 516602d674cSSagi Grimberg dev_err(queue->ctrl->ctrl.device, 517602d674cSSagi Grimberg "queue %d tag %#x SUCCESS set but not last PDU\n", 518602d674cSSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 519602d674cSSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 520602d674cSSagi Grimberg return -EPROTO; 521602d674cSSagi Grimberg } 522602d674cSSagi Grimberg 5233f2304f8SSagi Grimberg return 0; 5243f2304f8SSagi Grimberg } 5253f2304f8SSagi Grimberg 5263f2304f8SSagi Grimberg static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue, 5273f2304f8SSagi Grimberg struct nvme_tcp_rsp_pdu *pdu) 5283f2304f8SSagi Grimberg { 5293f2304f8SSagi Grimberg struct nvme_completion *cqe = &pdu->cqe; 5303f2304f8SSagi Grimberg int ret = 0; 5313f2304f8SSagi Grimberg 5323f2304f8SSagi Grimberg /* 5333f2304f8SSagi Grimberg * AEN requests are special as they don't time out and can 5343f2304f8SSagi Grimberg * survive any kind of queue freeze and often don't respond to 5353f2304f8SSagi Grimberg * aborts. We don't even bother to allocate a struct request 5363f2304f8SSagi Grimberg * for them but rather special case them here. 5373f2304f8SSagi Grimberg */ 53858a8df67SIsrael Rukshin if (unlikely(nvme_is_aen_req(nvme_tcp_queue_id(queue), 53958a8df67SIsrael Rukshin cqe->command_id))) 5403f2304f8SSagi Grimberg nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, 5413f2304f8SSagi Grimberg &cqe->result); 5423f2304f8SSagi Grimberg else 5433f2304f8SSagi Grimberg ret = nvme_tcp_process_nvme_cqe(queue, cqe); 5443f2304f8SSagi Grimberg 5453f2304f8SSagi Grimberg return ret; 5463f2304f8SSagi Grimberg } 5473f2304f8SSagi Grimberg 5483f2304f8SSagi Grimberg static int nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req, 5493f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5503f2304f8SSagi Grimberg { 5513f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *data = req->pdu; 5523f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 5533f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 5543f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 5553f2304f8SSagi Grimberg u8 ddgst = nvme_tcp_ddgst_len(queue); 5563f2304f8SSagi Grimberg 5573f2304f8SSagi Grimberg req->pdu_len = le32_to_cpu(pdu->r2t_length); 5583f2304f8SSagi Grimberg req->pdu_sent = 0; 5593f2304f8SSagi Grimberg 5603f2304f8SSagi Grimberg if (unlikely(req->data_sent + req->pdu_len > req->data_len)) { 5613f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5623f2304f8SSagi Grimberg "req %d r2t len %u exceeded data len %u (%zu sent)\n", 5633f2304f8SSagi Grimberg rq->tag, req->pdu_len, req->data_len, 5643f2304f8SSagi Grimberg req->data_sent); 5653f2304f8SSagi Grimberg return -EPROTO; 5663f2304f8SSagi Grimberg } 5673f2304f8SSagi Grimberg 5683f2304f8SSagi Grimberg if (unlikely(le32_to_cpu(pdu->r2t_offset) < req->data_sent)) { 5693f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5703f2304f8SSagi Grimberg "req %d unexpected r2t offset %u (expected %zu)\n", 5713f2304f8SSagi Grimberg rq->tag, le32_to_cpu(pdu->r2t_offset), 5723f2304f8SSagi Grimberg req->data_sent); 5733f2304f8SSagi Grimberg return -EPROTO; 5743f2304f8SSagi Grimberg } 5753f2304f8SSagi Grimberg 5763f2304f8SSagi Grimberg memset(data, 0, sizeof(*data)); 5773f2304f8SSagi Grimberg data->hdr.type = nvme_tcp_h2c_data; 5783f2304f8SSagi Grimberg data->hdr.flags = NVME_TCP_F_DATA_LAST; 5793f2304f8SSagi Grimberg if (queue->hdr_digest) 5803f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_HDGST; 5813f2304f8SSagi Grimberg if (queue->data_digest) 5823f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_DDGST; 5833f2304f8SSagi Grimberg data->hdr.hlen = sizeof(*data); 5843f2304f8SSagi Grimberg data->hdr.pdo = data->hdr.hlen + hdgst; 5853f2304f8SSagi Grimberg data->hdr.plen = 5863f2304f8SSagi Grimberg cpu_to_le32(data->hdr.hlen + hdgst + req->pdu_len + ddgst); 5873f2304f8SSagi Grimberg data->ttag = pdu->ttag; 5883f2304f8SSagi Grimberg data->command_id = rq->tag; 5893f2304f8SSagi Grimberg data->data_offset = cpu_to_le32(req->data_sent); 5903f2304f8SSagi Grimberg data->data_length = cpu_to_le32(req->pdu_len); 5913f2304f8SSagi Grimberg return 0; 5923f2304f8SSagi Grimberg } 5933f2304f8SSagi Grimberg 5943f2304f8SSagi Grimberg static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue, 5953f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5963f2304f8SSagi Grimberg { 5973f2304f8SSagi Grimberg struct nvme_tcp_request *req; 5983f2304f8SSagi Grimberg struct request *rq; 5993f2304f8SSagi Grimberg int ret; 6003f2304f8SSagi Grimberg 6013f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 6023f2304f8SSagi Grimberg if (!rq) { 6033f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6043f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 6053f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 6063f2304f8SSagi Grimberg return -ENOENT; 6073f2304f8SSagi Grimberg } 6083f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 6093f2304f8SSagi Grimberg 6103f2304f8SSagi Grimberg ret = nvme_tcp_setup_h2c_data_pdu(req, pdu); 6113f2304f8SSagi Grimberg if (unlikely(ret)) 6123f2304f8SSagi Grimberg return ret; 6133f2304f8SSagi Grimberg 6143f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_H2C_PDU; 6153f2304f8SSagi Grimberg req->offset = 0; 6163f2304f8SSagi Grimberg 61786f0348aSSagi Grimberg nvme_tcp_queue_request(req, false, true); 6183f2304f8SSagi Grimberg 6193f2304f8SSagi Grimberg return 0; 6203f2304f8SSagi Grimberg } 6213f2304f8SSagi Grimberg 6223f2304f8SSagi Grimberg static int nvme_tcp_recv_pdu(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6233f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6243f2304f8SSagi Grimberg { 6253f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr; 6263f2304f8SSagi Grimberg char *pdu = queue->pdu; 6273f2304f8SSagi Grimberg size_t rcv_len = min_t(size_t, *len, queue->pdu_remaining); 6283f2304f8SSagi Grimberg int ret; 6293f2304f8SSagi Grimberg 6303f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, 6313f2304f8SSagi Grimberg &pdu[queue->pdu_offset], rcv_len); 6323f2304f8SSagi Grimberg if (unlikely(ret)) 6333f2304f8SSagi Grimberg return ret; 6343f2304f8SSagi Grimberg 6353f2304f8SSagi Grimberg queue->pdu_remaining -= rcv_len; 6363f2304f8SSagi Grimberg queue->pdu_offset += rcv_len; 6373f2304f8SSagi Grimberg *offset += rcv_len; 6383f2304f8SSagi Grimberg *len -= rcv_len; 6393f2304f8SSagi Grimberg if (queue->pdu_remaining) 6403f2304f8SSagi Grimberg return 0; 6413f2304f8SSagi Grimberg 6423f2304f8SSagi Grimberg hdr = queue->pdu; 6433f2304f8SSagi Grimberg if (queue->hdr_digest) { 6443f2304f8SSagi Grimberg ret = nvme_tcp_verify_hdgst(queue, queue->pdu, hdr->hlen); 6453f2304f8SSagi Grimberg if (unlikely(ret)) 6463f2304f8SSagi Grimberg return ret; 6473f2304f8SSagi Grimberg } 6483f2304f8SSagi Grimberg 6493f2304f8SSagi Grimberg 6503f2304f8SSagi Grimberg if (queue->data_digest) { 6513f2304f8SSagi Grimberg ret = nvme_tcp_check_ddgst(queue, queue->pdu); 6523f2304f8SSagi Grimberg if (unlikely(ret)) 6533f2304f8SSagi Grimberg return ret; 6543f2304f8SSagi Grimberg } 6553f2304f8SSagi Grimberg 6563f2304f8SSagi Grimberg switch (hdr->type) { 6573f2304f8SSagi Grimberg case nvme_tcp_c2h_data: 6586be18260SSagi Grimberg return nvme_tcp_handle_c2h_data(queue, (void *)queue->pdu); 6593f2304f8SSagi Grimberg case nvme_tcp_rsp: 6603f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6616be18260SSagi Grimberg return nvme_tcp_handle_comp(queue, (void *)queue->pdu); 6623f2304f8SSagi Grimberg case nvme_tcp_r2t: 6633f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6646be18260SSagi Grimberg return nvme_tcp_handle_r2t(queue, (void *)queue->pdu); 6653f2304f8SSagi Grimberg default: 6663f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6673f2304f8SSagi Grimberg "unsupported pdu type (%d)\n", hdr->type); 6683f2304f8SSagi Grimberg return -EINVAL; 6693f2304f8SSagi Grimberg } 6703f2304f8SSagi Grimberg } 6713f2304f8SSagi Grimberg 672988aef9eSChristoph Hellwig static inline void nvme_tcp_end_request(struct request *rq, u16 status) 673602d674cSSagi Grimberg { 674602d674cSSagi Grimberg union nvme_result res = {}; 675602d674cSSagi Grimberg 6762eb81a33SChristoph Hellwig if (!nvme_try_complete_req(rq, cpu_to_le16(status << 1), res)) 677ff029451SChristoph Hellwig nvme_complete_rq(rq); 678602d674cSSagi Grimberg } 679602d674cSSagi Grimberg 6803f2304f8SSagi Grimberg static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6813f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6823f2304f8SSagi Grimberg { 6833f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 6843f2304f8SSagi Grimberg struct nvme_tcp_request *req; 6853f2304f8SSagi Grimberg struct request *rq; 6863f2304f8SSagi Grimberg 6873f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 6883f2304f8SSagi Grimberg if (!rq) { 6893f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6903f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 6913f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 6923f2304f8SSagi Grimberg return -ENOENT; 6933f2304f8SSagi Grimberg } 6943f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 6953f2304f8SSagi Grimberg 6963f2304f8SSagi Grimberg while (true) { 6973f2304f8SSagi Grimberg int recv_len, ret; 6983f2304f8SSagi Grimberg 6993f2304f8SSagi Grimberg recv_len = min_t(size_t, *len, queue->data_remaining); 7003f2304f8SSagi Grimberg if (!recv_len) 7013f2304f8SSagi Grimberg break; 7023f2304f8SSagi Grimberg 7033f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter)) { 7043f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 7053f2304f8SSagi Grimberg 7063f2304f8SSagi Grimberg /* 7073f2304f8SSagi Grimberg * If we don`t have any bios it means that controller 7083f2304f8SSagi Grimberg * sent more data than we requested, hence error 7093f2304f8SSagi Grimberg */ 7103f2304f8SSagi Grimberg if (!req->curr_bio) { 7113f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7123f2304f8SSagi Grimberg "queue %d no space in request %#x", 7133f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 7143f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7153f2304f8SSagi Grimberg return -EIO; 7163f2304f8SSagi Grimberg } 7173f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 7183f2304f8SSagi Grimberg } 7193f2304f8SSagi Grimberg 7203f2304f8SSagi Grimberg /* we can read only from what is left in this bio */ 7213f2304f8SSagi Grimberg recv_len = min_t(size_t, recv_len, 7223f2304f8SSagi Grimberg iov_iter_count(&req->iter)); 7233f2304f8SSagi Grimberg 7243f2304f8SSagi Grimberg if (queue->data_digest) 7253f2304f8SSagi Grimberg ret = skb_copy_and_hash_datagram_iter(skb, *offset, 7263f2304f8SSagi Grimberg &req->iter, recv_len, queue->rcv_hash); 7273f2304f8SSagi Grimberg else 7283f2304f8SSagi Grimberg ret = skb_copy_datagram_iter(skb, *offset, 7293f2304f8SSagi Grimberg &req->iter, recv_len); 7303f2304f8SSagi Grimberg if (ret) { 7313f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7323f2304f8SSagi Grimberg "queue %d failed to copy request %#x data", 7333f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 7343f2304f8SSagi Grimberg return ret; 7353f2304f8SSagi Grimberg } 7363f2304f8SSagi Grimberg 7373f2304f8SSagi Grimberg *len -= recv_len; 7383f2304f8SSagi Grimberg *offset += recv_len; 7393f2304f8SSagi Grimberg queue->data_remaining -= recv_len; 7403f2304f8SSagi Grimberg } 7413f2304f8SSagi Grimberg 7423f2304f8SSagi Grimberg if (!queue->data_remaining) { 7433f2304f8SSagi Grimberg if (queue->data_digest) { 7443f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst); 7453f2304f8SSagi Grimberg queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH; 7463f2304f8SSagi Grimberg } else { 7471a9460ceSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 748602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7491a9460ceSSagi Grimberg queue->nr_cqe++; 7501a9460ceSSagi Grimberg } 7513f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7523f2304f8SSagi Grimberg } 7533f2304f8SSagi Grimberg } 7543f2304f8SSagi Grimberg 7553f2304f8SSagi Grimberg return 0; 7563f2304f8SSagi Grimberg } 7573f2304f8SSagi Grimberg 7583f2304f8SSagi Grimberg static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue, 7593f2304f8SSagi Grimberg struct sk_buff *skb, unsigned int *offset, size_t *len) 7603f2304f8SSagi Grimberg { 761602d674cSSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 7623f2304f8SSagi Grimberg char *ddgst = (char *)&queue->recv_ddgst; 7633f2304f8SSagi Grimberg size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining); 7643f2304f8SSagi Grimberg off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining; 7653f2304f8SSagi Grimberg int ret; 7663f2304f8SSagi Grimberg 7673f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, &ddgst[off], recv_len); 7683f2304f8SSagi Grimberg if (unlikely(ret)) 7693f2304f8SSagi Grimberg return ret; 7703f2304f8SSagi Grimberg 7713f2304f8SSagi Grimberg queue->ddgst_remaining -= recv_len; 7723f2304f8SSagi Grimberg *offset += recv_len; 7733f2304f8SSagi Grimberg *len -= recv_len; 7743f2304f8SSagi Grimberg if (queue->ddgst_remaining) 7753f2304f8SSagi Grimberg return 0; 7763f2304f8SSagi Grimberg 7773f2304f8SSagi Grimberg if (queue->recv_ddgst != queue->exp_ddgst) { 7783f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7793f2304f8SSagi Grimberg "data digest error: recv %#x expected %#x\n", 7803f2304f8SSagi Grimberg le32_to_cpu(queue->recv_ddgst), 7813f2304f8SSagi Grimberg le32_to_cpu(queue->exp_ddgst)); 7823f2304f8SSagi Grimberg return -EIO; 7833f2304f8SSagi Grimberg } 7843f2304f8SSagi Grimberg 785602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 786602d674cSSagi Grimberg struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), 787602d674cSSagi Grimberg pdu->command_id); 788602d674cSSagi Grimberg 789602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7901a9460ceSSagi Grimberg queue->nr_cqe++; 791602d674cSSagi Grimberg } 792602d674cSSagi Grimberg 7933f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7943f2304f8SSagi Grimberg return 0; 7953f2304f8SSagi Grimberg } 7963f2304f8SSagi Grimberg 7973f2304f8SSagi Grimberg static int nvme_tcp_recv_skb(read_descriptor_t *desc, struct sk_buff *skb, 7983f2304f8SSagi Grimberg unsigned int offset, size_t len) 7993f2304f8SSagi Grimberg { 8003f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = desc->arg.data; 8013f2304f8SSagi Grimberg size_t consumed = len; 8023f2304f8SSagi Grimberg int result; 8033f2304f8SSagi Grimberg 8043f2304f8SSagi Grimberg while (len) { 8053f2304f8SSagi Grimberg switch (nvme_tcp_recv_state(queue)) { 8063f2304f8SSagi Grimberg case NVME_TCP_RECV_PDU: 8073f2304f8SSagi Grimberg result = nvme_tcp_recv_pdu(queue, skb, &offset, &len); 8083f2304f8SSagi Grimberg break; 8093f2304f8SSagi Grimberg case NVME_TCP_RECV_DATA: 8103f2304f8SSagi Grimberg result = nvme_tcp_recv_data(queue, skb, &offset, &len); 8113f2304f8SSagi Grimberg break; 8123f2304f8SSagi Grimberg case NVME_TCP_RECV_DDGST: 8133f2304f8SSagi Grimberg result = nvme_tcp_recv_ddgst(queue, skb, &offset, &len); 8143f2304f8SSagi Grimberg break; 8153f2304f8SSagi Grimberg default: 8163f2304f8SSagi Grimberg result = -EFAULT; 8173f2304f8SSagi Grimberg } 8183f2304f8SSagi Grimberg if (result) { 8193f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 8203f2304f8SSagi Grimberg "receive failed: %d\n", result); 8213f2304f8SSagi Grimberg queue->rd_enabled = false; 8223f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8233f2304f8SSagi Grimberg return result; 8243f2304f8SSagi Grimberg } 8253f2304f8SSagi Grimberg } 8263f2304f8SSagi Grimberg 8273f2304f8SSagi Grimberg return consumed; 8283f2304f8SSagi Grimberg } 8293f2304f8SSagi Grimberg 8303f2304f8SSagi Grimberg static void nvme_tcp_data_ready(struct sock *sk) 8313f2304f8SSagi Grimberg { 8323f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8333f2304f8SSagi Grimberg 834386e5e6eSSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8353f2304f8SSagi Grimberg queue = sk->sk_user_data; 83672e5d757SSagi Grimberg if (likely(queue && queue->rd_enabled) && 83772e5d757SSagi Grimberg !test_bit(NVME_TCP_Q_POLLING, &queue->flags)) 8383f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 839386e5e6eSSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8403f2304f8SSagi Grimberg } 8413f2304f8SSagi Grimberg 8423f2304f8SSagi Grimberg static void nvme_tcp_write_space(struct sock *sk) 8433f2304f8SSagi Grimberg { 8443f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8453f2304f8SSagi Grimberg 8463f2304f8SSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8473f2304f8SSagi Grimberg queue = sk->sk_user_data; 8483f2304f8SSagi Grimberg if (likely(queue && sk_stream_is_writeable(sk))) { 8493f2304f8SSagi Grimberg clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); 8503f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 8513f2304f8SSagi Grimberg } 8523f2304f8SSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8533f2304f8SSagi Grimberg } 8543f2304f8SSagi Grimberg 8553f2304f8SSagi Grimberg static void nvme_tcp_state_change(struct sock *sk) 8563f2304f8SSagi Grimberg { 8573f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8583f2304f8SSagi Grimberg 8593f2304f8SSagi Grimberg read_lock(&sk->sk_callback_lock); 8603f2304f8SSagi Grimberg queue = sk->sk_user_data; 8613f2304f8SSagi Grimberg if (!queue) 8623f2304f8SSagi Grimberg goto done; 8633f2304f8SSagi Grimberg 8643f2304f8SSagi Grimberg switch (sk->sk_state) { 8653f2304f8SSagi Grimberg case TCP_CLOSE: 8663f2304f8SSagi Grimberg case TCP_CLOSE_WAIT: 8673f2304f8SSagi Grimberg case TCP_LAST_ACK: 8683f2304f8SSagi Grimberg case TCP_FIN_WAIT1: 8693f2304f8SSagi Grimberg case TCP_FIN_WAIT2: 8703f2304f8SSagi Grimberg /* fallthrough */ 8713f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8723f2304f8SSagi Grimberg break; 8733f2304f8SSagi Grimberg default: 8743f2304f8SSagi Grimberg dev_info(queue->ctrl->ctrl.device, 8753f2304f8SSagi Grimberg "queue %d socket state %d\n", 8763f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), sk->sk_state); 8773f2304f8SSagi Grimberg } 8783f2304f8SSagi Grimberg 8793f2304f8SSagi Grimberg queue->state_change(sk); 8803f2304f8SSagi Grimberg done: 8813f2304f8SSagi Grimberg read_unlock(&sk->sk_callback_lock); 8823f2304f8SSagi Grimberg } 8833f2304f8SSagi Grimberg 884122e5b9fSSagi Grimberg static inline bool nvme_tcp_queue_more(struct nvme_tcp_queue *queue) 885122e5b9fSSagi Grimberg { 886122e5b9fSSagi Grimberg return !list_empty(&queue->send_list) || 887122e5b9fSSagi Grimberg !llist_empty(&queue->req_list) || queue->more_requests; 888122e5b9fSSagi Grimberg } 889122e5b9fSSagi Grimberg 8903f2304f8SSagi Grimberg static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue) 8913f2304f8SSagi Grimberg { 8923f2304f8SSagi Grimberg queue->request = NULL; 8933f2304f8SSagi Grimberg } 8943f2304f8SSagi Grimberg 8953f2304f8SSagi Grimberg static void nvme_tcp_fail_request(struct nvme_tcp_request *req) 8963f2304f8SSagi Grimberg { 89716686010SSagi Grimberg nvme_tcp_end_request(blk_mq_rq_from_pdu(req), NVME_SC_HOST_PATH_ERROR); 8983f2304f8SSagi Grimberg } 8993f2304f8SSagi Grimberg 9003f2304f8SSagi Grimberg static int nvme_tcp_try_send_data(struct nvme_tcp_request *req) 9013f2304f8SSagi Grimberg { 9023f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9033f2304f8SSagi Grimberg 9043f2304f8SSagi Grimberg while (true) { 9053f2304f8SSagi Grimberg struct page *page = nvme_tcp_req_cur_page(req); 9063f2304f8SSagi Grimberg size_t offset = nvme_tcp_req_cur_offset(req); 9073f2304f8SSagi Grimberg size_t len = nvme_tcp_req_cur_length(req); 9083f2304f8SSagi Grimberg bool last = nvme_tcp_pdu_last_send(req, len); 9093f2304f8SSagi Grimberg int ret, flags = MSG_DONTWAIT; 9103f2304f8SSagi Grimberg 911122e5b9fSSagi Grimberg if (last && !queue->data_digest && !nvme_tcp_queue_more(queue)) 9123f2304f8SSagi Grimberg flags |= MSG_EOR; 9133f2304f8SSagi Grimberg else 9145bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 9153f2304f8SSagi Grimberg 91637c15219SMikhail Skorzhinskii /* can't zcopy slab pages */ 91737c15219SMikhail Skorzhinskii if (unlikely(PageSlab(page))) { 91837c15219SMikhail Skorzhinskii ret = sock_no_sendpage(queue->sock, page, offset, len, 91937c15219SMikhail Skorzhinskii flags); 92037c15219SMikhail Skorzhinskii } else { 92137c15219SMikhail Skorzhinskii ret = kernel_sendpage(queue->sock, page, offset, len, 92237c15219SMikhail Skorzhinskii flags); 92337c15219SMikhail Skorzhinskii } 9243f2304f8SSagi Grimberg if (ret <= 0) 9253f2304f8SSagi Grimberg return ret; 9263f2304f8SSagi Grimberg 9273f2304f8SSagi Grimberg nvme_tcp_advance_req(req, ret); 9283f2304f8SSagi Grimberg if (queue->data_digest) 9293f2304f8SSagi Grimberg nvme_tcp_ddgst_update(queue->snd_hash, page, 9303f2304f8SSagi Grimberg offset, ret); 9313f2304f8SSagi Grimberg 9323f2304f8SSagi Grimberg /* fully successful last write*/ 9333f2304f8SSagi Grimberg if (last && ret == len) { 9343f2304f8SSagi Grimberg if (queue->data_digest) { 9353f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->snd_hash, 9363f2304f8SSagi Grimberg &req->ddgst); 9373f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DDGST; 9383f2304f8SSagi Grimberg req->offset = 0; 9393f2304f8SSagi Grimberg } else { 9403f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9413f2304f8SSagi Grimberg } 9423f2304f8SSagi Grimberg return 1; 9433f2304f8SSagi Grimberg } 9443f2304f8SSagi Grimberg } 9453f2304f8SSagi Grimberg return -EAGAIN; 9463f2304f8SSagi Grimberg } 9473f2304f8SSagi Grimberg 9483f2304f8SSagi Grimberg static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) 9493f2304f8SSagi Grimberg { 9503f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9513f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 9523f2304f8SSagi Grimberg bool inline_data = nvme_tcp_has_inline_data(req); 9533f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9543f2304f8SSagi Grimberg int len = sizeof(*pdu) + hdgst - req->offset; 9555bb052d7SSagi Grimberg int flags = MSG_DONTWAIT; 9563f2304f8SSagi Grimberg int ret; 9573f2304f8SSagi Grimberg 958122e5b9fSSagi Grimberg if (inline_data || nvme_tcp_queue_more(queue)) 9595bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 9605bb052d7SSagi Grimberg else 9615bb052d7SSagi Grimberg flags |= MSG_EOR; 9625bb052d7SSagi Grimberg 9633f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9643f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9653f2304f8SSagi Grimberg 9663f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9673f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, flags); 9683f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9693f2304f8SSagi Grimberg return ret; 9703f2304f8SSagi Grimberg 9713f2304f8SSagi Grimberg len -= ret; 9723f2304f8SSagi Grimberg if (!len) { 9733f2304f8SSagi Grimberg if (inline_data) { 9743f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9753f2304f8SSagi Grimberg if (queue->data_digest) 9763f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9773f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 9783f2304f8SSagi Grimberg } else { 9793f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9803f2304f8SSagi Grimberg } 9813f2304f8SSagi Grimberg return 1; 9823f2304f8SSagi Grimberg } 9833f2304f8SSagi Grimberg req->offset += ret; 9843f2304f8SSagi Grimberg 9853f2304f8SSagi Grimberg return -EAGAIN; 9863f2304f8SSagi Grimberg } 9873f2304f8SSagi Grimberg 9883f2304f8SSagi Grimberg static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req) 9893f2304f8SSagi Grimberg { 9903f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9913f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = req->pdu; 9923f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9933f2304f8SSagi Grimberg int len = sizeof(*pdu) - req->offset + hdgst; 9943f2304f8SSagi Grimberg int ret; 9953f2304f8SSagi Grimberg 9963f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9973f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9983f2304f8SSagi Grimberg 9993f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 10003f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, 10015bb052d7SSagi Grimberg MSG_DONTWAIT | MSG_MORE | MSG_SENDPAGE_NOTLAST); 10023f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 10033f2304f8SSagi Grimberg return ret; 10043f2304f8SSagi Grimberg 10053f2304f8SSagi Grimberg len -= ret; 10063f2304f8SSagi Grimberg if (!len) { 10073f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 10083f2304f8SSagi Grimberg if (queue->data_digest) 10093f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 10103f2304f8SSagi Grimberg if (!req->data_sent) 10113f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 10123f2304f8SSagi Grimberg return 1; 10133f2304f8SSagi Grimberg } 10143f2304f8SSagi Grimberg req->offset += ret; 10153f2304f8SSagi Grimberg 10163f2304f8SSagi Grimberg return -EAGAIN; 10173f2304f8SSagi Grimberg } 10183f2304f8SSagi Grimberg 10193f2304f8SSagi Grimberg static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req) 10203f2304f8SSagi Grimberg { 10213f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 10223f2304f8SSagi Grimberg int ret; 1023122e5b9fSSagi Grimberg struct msghdr msg = { .msg_flags = MSG_DONTWAIT }; 10243f2304f8SSagi Grimberg struct kvec iov = { 10253f2304f8SSagi Grimberg .iov_base = &req->ddgst + req->offset, 10263f2304f8SSagi Grimberg .iov_len = NVME_TCP_DIGEST_LENGTH - req->offset 10273f2304f8SSagi Grimberg }; 10283f2304f8SSagi Grimberg 1029122e5b9fSSagi Grimberg if (nvme_tcp_queue_more(queue)) 1030122e5b9fSSagi Grimberg msg.msg_flags |= MSG_MORE; 1031122e5b9fSSagi Grimberg else 1032122e5b9fSSagi Grimberg msg.msg_flags |= MSG_EOR; 1033122e5b9fSSagi Grimberg 10343f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 10353f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 10363f2304f8SSagi Grimberg return ret; 10373f2304f8SSagi Grimberg 10383f2304f8SSagi Grimberg if (req->offset + ret == NVME_TCP_DIGEST_LENGTH) { 10393f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 10403f2304f8SSagi Grimberg return 1; 10413f2304f8SSagi Grimberg } 10423f2304f8SSagi Grimberg 10433f2304f8SSagi Grimberg req->offset += ret; 10443f2304f8SSagi Grimberg return -EAGAIN; 10453f2304f8SSagi Grimberg } 10463f2304f8SSagi Grimberg 10473f2304f8SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue) 10483f2304f8SSagi Grimberg { 10493f2304f8SSagi Grimberg struct nvme_tcp_request *req; 10503f2304f8SSagi Grimberg int ret = 1; 10513f2304f8SSagi Grimberg 10523f2304f8SSagi Grimberg if (!queue->request) { 10533f2304f8SSagi Grimberg queue->request = nvme_tcp_fetch_request(queue); 10543f2304f8SSagi Grimberg if (!queue->request) 10553f2304f8SSagi Grimberg return 0; 10563f2304f8SSagi Grimberg } 10573f2304f8SSagi Grimberg req = queue->request; 10583f2304f8SSagi Grimberg 10593f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_CMD_PDU) { 10603f2304f8SSagi Grimberg ret = nvme_tcp_try_send_cmd_pdu(req); 10613f2304f8SSagi Grimberg if (ret <= 0) 10623f2304f8SSagi Grimberg goto done; 10633f2304f8SSagi Grimberg if (!nvme_tcp_has_inline_data(req)) 10643f2304f8SSagi Grimberg return ret; 10653f2304f8SSagi Grimberg } 10663f2304f8SSagi Grimberg 10673f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_H2C_PDU) { 10683f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data_pdu(req); 10693f2304f8SSagi Grimberg if (ret <= 0) 10703f2304f8SSagi Grimberg goto done; 10713f2304f8SSagi Grimberg } 10723f2304f8SSagi Grimberg 10733f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DATA) { 10743f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data(req); 10753f2304f8SSagi Grimberg if (ret <= 0) 10763f2304f8SSagi Grimberg goto done; 10773f2304f8SSagi Grimberg } 10783f2304f8SSagi Grimberg 10793f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DDGST) 10803f2304f8SSagi Grimberg ret = nvme_tcp_try_send_ddgst(req); 10813f2304f8SSagi Grimberg done: 10825ff4e112SSagi Grimberg if (ret == -EAGAIN) { 10833f2304f8SSagi Grimberg ret = 0; 10845ff4e112SSagi Grimberg } else if (ret < 0) { 10855ff4e112SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 10865ff4e112SSagi Grimberg "failed to send request %d\n", ret); 10875ff4e112SSagi Grimberg if (ret != -EPIPE && ret != -ECONNRESET) 10885ff4e112SSagi Grimberg nvme_tcp_fail_request(queue->request); 10895ff4e112SSagi Grimberg nvme_tcp_done_send_req(queue); 10905ff4e112SSagi Grimberg } 10913f2304f8SSagi Grimberg return ret; 10923f2304f8SSagi Grimberg } 10933f2304f8SSagi Grimberg 10943f2304f8SSagi Grimberg static int nvme_tcp_try_recv(struct nvme_tcp_queue *queue) 10953f2304f8SSagi Grimberg { 109610407ec9SPotnuri Bharat Teja struct socket *sock = queue->sock; 109710407ec9SPotnuri Bharat Teja struct sock *sk = sock->sk; 10983f2304f8SSagi Grimberg read_descriptor_t rd_desc; 10993f2304f8SSagi Grimberg int consumed; 11003f2304f8SSagi Grimberg 11013f2304f8SSagi Grimberg rd_desc.arg.data = queue; 11023f2304f8SSagi Grimberg rd_desc.count = 1; 11033f2304f8SSagi Grimberg lock_sock(sk); 11041a9460ceSSagi Grimberg queue->nr_cqe = 0; 110510407ec9SPotnuri Bharat Teja consumed = sock->ops->read_sock(sk, &rd_desc, nvme_tcp_recv_skb); 11063f2304f8SSagi Grimberg release_sock(sk); 11073f2304f8SSagi Grimberg return consumed; 11083f2304f8SSagi Grimberg } 11093f2304f8SSagi Grimberg 11103f2304f8SSagi Grimberg static void nvme_tcp_io_work(struct work_struct *w) 11113f2304f8SSagi Grimberg { 11123f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = 11133f2304f8SSagi Grimberg container_of(w, struct nvme_tcp_queue, io_work); 1114ddef2957SWunderlich, Mark unsigned long deadline = jiffies + msecs_to_jiffies(1); 11153f2304f8SSagi Grimberg 11163f2304f8SSagi Grimberg do { 11173f2304f8SSagi Grimberg bool pending = false; 11183f2304f8SSagi Grimberg int result; 11193f2304f8SSagi Grimberg 1120db5ad6b7SSagi Grimberg if (mutex_trylock(&queue->send_mutex)) { 11213f2304f8SSagi Grimberg result = nvme_tcp_try_send(queue); 1122db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 11235ff4e112SSagi Grimberg if (result > 0) 11243f2304f8SSagi Grimberg pending = true; 11255ff4e112SSagi Grimberg else if (unlikely(result < 0)) 11265ff4e112SSagi Grimberg break; 1127db5ad6b7SSagi Grimberg } 11283f2304f8SSagi Grimberg 11293f2304f8SSagi Grimberg result = nvme_tcp_try_recv(queue); 11303f2304f8SSagi Grimberg if (result > 0) 11313f2304f8SSagi Grimberg pending = true; 1132761ad26cSSagi Grimberg else if (unlikely(result < 0)) 113339d06079SSagi Grimberg return; 11343f2304f8SSagi Grimberg 11353f2304f8SSagi Grimberg if (!pending) 11363f2304f8SSagi Grimberg return; 11373f2304f8SSagi Grimberg 1138ddef2957SWunderlich, Mark } while (!time_after(jiffies, deadline)); /* quota is exhausted */ 11393f2304f8SSagi Grimberg 11403f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 11413f2304f8SSagi Grimberg } 11423f2304f8SSagi Grimberg 11433f2304f8SSagi Grimberg static void nvme_tcp_free_crypto(struct nvme_tcp_queue *queue) 11443f2304f8SSagi Grimberg { 11453f2304f8SSagi Grimberg struct crypto_ahash *tfm = crypto_ahash_reqtfm(queue->rcv_hash); 11463f2304f8SSagi Grimberg 11473f2304f8SSagi Grimberg ahash_request_free(queue->rcv_hash); 11483f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11493f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11503f2304f8SSagi Grimberg } 11513f2304f8SSagi Grimberg 11523f2304f8SSagi Grimberg static int nvme_tcp_alloc_crypto(struct nvme_tcp_queue *queue) 11533f2304f8SSagi Grimberg { 11543f2304f8SSagi Grimberg struct crypto_ahash *tfm; 11553f2304f8SSagi Grimberg 11563f2304f8SSagi Grimberg tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 11573f2304f8SSagi Grimberg if (IS_ERR(tfm)) 11583f2304f8SSagi Grimberg return PTR_ERR(tfm); 11593f2304f8SSagi Grimberg 11603f2304f8SSagi Grimberg queue->snd_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11613f2304f8SSagi Grimberg if (!queue->snd_hash) 11623f2304f8SSagi Grimberg goto free_tfm; 11633f2304f8SSagi Grimberg ahash_request_set_callback(queue->snd_hash, 0, NULL, NULL); 11643f2304f8SSagi Grimberg 11653f2304f8SSagi Grimberg queue->rcv_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11663f2304f8SSagi Grimberg if (!queue->rcv_hash) 11673f2304f8SSagi Grimberg goto free_snd_hash; 11683f2304f8SSagi Grimberg ahash_request_set_callback(queue->rcv_hash, 0, NULL, NULL); 11693f2304f8SSagi Grimberg 11703f2304f8SSagi Grimberg return 0; 11713f2304f8SSagi Grimberg free_snd_hash: 11723f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11733f2304f8SSagi Grimberg free_tfm: 11743f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11753f2304f8SSagi Grimberg return -ENOMEM; 11763f2304f8SSagi Grimberg } 11773f2304f8SSagi Grimberg 11783f2304f8SSagi Grimberg static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl) 11793f2304f8SSagi Grimberg { 11803f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11813f2304f8SSagi Grimberg 11823f2304f8SSagi Grimberg page_frag_free(async->pdu); 11833f2304f8SSagi Grimberg } 11843f2304f8SSagi Grimberg 11853f2304f8SSagi Grimberg static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) 11863f2304f8SSagi Grimberg { 11873f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 11883f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11893f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 11903f2304f8SSagi Grimberg 11913f2304f8SSagi Grimberg async->pdu = page_frag_alloc(&queue->pf_cache, 11923f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 11933f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 11943f2304f8SSagi Grimberg if (!async->pdu) 11953f2304f8SSagi Grimberg return -ENOMEM; 11963f2304f8SSagi Grimberg 11973f2304f8SSagi Grimberg async->queue = &ctrl->queues[0]; 11983f2304f8SSagi Grimberg return 0; 11993f2304f8SSagi Grimberg } 12003f2304f8SSagi Grimberg 12013f2304f8SSagi Grimberg static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid) 12023f2304f8SSagi Grimberg { 12033f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 12043f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 12053f2304f8SSagi Grimberg 12063f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_ALLOCATED, &queue->flags)) 12073f2304f8SSagi Grimberg return; 12083f2304f8SSagi Grimberg 12093f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 12103f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 12113f2304f8SSagi Grimberg 12123f2304f8SSagi Grimberg sock_release(queue->sock); 12133f2304f8SSagi Grimberg kfree(queue->pdu); 12143f2304f8SSagi Grimberg } 12153f2304f8SSagi Grimberg 12163f2304f8SSagi Grimberg static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) 12173f2304f8SSagi Grimberg { 12183f2304f8SSagi Grimberg struct nvme_tcp_icreq_pdu *icreq; 12193f2304f8SSagi Grimberg struct nvme_tcp_icresp_pdu *icresp; 12203f2304f8SSagi Grimberg struct msghdr msg = {}; 12213f2304f8SSagi Grimberg struct kvec iov; 12223f2304f8SSagi Grimberg bool ctrl_hdgst, ctrl_ddgst; 12233f2304f8SSagi Grimberg int ret; 12243f2304f8SSagi Grimberg 12253f2304f8SSagi Grimberg icreq = kzalloc(sizeof(*icreq), GFP_KERNEL); 12263f2304f8SSagi Grimberg if (!icreq) 12273f2304f8SSagi Grimberg return -ENOMEM; 12283f2304f8SSagi Grimberg 12293f2304f8SSagi Grimberg icresp = kzalloc(sizeof(*icresp), GFP_KERNEL); 12303f2304f8SSagi Grimberg if (!icresp) { 12313f2304f8SSagi Grimberg ret = -ENOMEM; 12323f2304f8SSagi Grimberg goto free_icreq; 12333f2304f8SSagi Grimberg } 12343f2304f8SSagi Grimberg 12353f2304f8SSagi Grimberg icreq->hdr.type = nvme_tcp_icreq; 12363f2304f8SSagi Grimberg icreq->hdr.hlen = sizeof(*icreq); 12373f2304f8SSagi Grimberg icreq->hdr.pdo = 0; 12383f2304f8SSagi Grimberg icreq->hdr.plen = cpu_to_le32(icreq->hdr.hlen); 12393f2304f8SSagi Grimberg icreq->pfv = cpu_to_le16(NVME_TCP_PFV_1_0); 12403f2304f8SSagi Grimberg icreq->maxr2t = 0; /* single inflight r2t supported */ 12413f2304f8SSagi Grimberg icreq->hpda = 0; /* no alignment constraint */ 12423f2304f8SSagi Grimberg if (queue->hdr_digest) 12433f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_HDR_DIGEST_ENABLE; 12443f2304f8SSagi Grimberg if (queue->data_digest) 12453f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_DATA_DIGEST_ENABLE; 12463f2304f8SSagi Grimberg 12473f2304f8SSagi Grimberg iov.iov_base = icreq; 12483f2304f8SSagi Grimberg iov.iov_len = sizeof(*icreq); 12493f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 12503f2304f8SSagi Grimberg if (ret < 0) 12513f2304f8SSagi Grimberg goto free_icresp; 12523f2304f8SSagi Grimberg 12533f2304f8SSagi Grimberg memset(&msg, 0, sizeof(msg)); 12543f2304f8SSagi Grimberg iov.iov_base = icresp; 12553f2304f8SSagi Grimberg iov.iov_len = sizeof(*icresp); 12563f2304f8SSagi Grimberg ret = kernel_recvmsg(queue->sock, &msg, &iov, 1, 12573f2304f8SSagi Grimberg iov.iov_len, msg.msg_flags); 12583f2304f8SSagi Grimberg if (ret < 0) 12593f2304f8SSagi Grimberg goto free_icresp; 12603f2304f8SSagi Grimberg 12613f2304f8SSagi Grimberg ret = -EINVAL; 12623f2304f8SSagi Grimberg if (icresp->hdr.type != nvme_tcp_icresp) { 12633f2304f8SSagi Grimberg pr_err("queue %d: bad type returned %d\n", 12643f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.type); 12653f2304f8SSagi Grimberg goto free_icresp; 12663f2304f8SSagi Grimberg } 12673f2304f8SSagi Grimberg 12683f2304f8SSagi Grimberg if (le32_to_cpu(icresp->hdr.plen) != sizeof(*icresp)) { 12693f2304f8SSagi Grimberg pr_err("queue %d: bad pdu length returned %d\n", 12703f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.plen); 12713f2304f8SSagi Grimberg goto free_icresp; 12723f2304f8SSagi Grimberg } 12733f2304f8SSagi Grimberg 12743f2304f8SSagi Grimberg if (icresp->pfv != NVME_TCP_PFV_1_0) { 12753f2304f8SSagi Grimberg pr_err("queue %d: bad pfv returned %d\n", 12763f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->pfv); 12773f2304f8SSagi Grimberg goto free_icresp; 12783f2304f8SSagi Grimberg } 12793f2304f8SSagi Grimberg 12803f2304f8SSagi Grimberg ctrl_ddgst = !!(icresp->digest & NVME_TCP_DATA_DIGEST_ENABLE); 12813f2304f8SSagi Grimberg if ((queue->data_digest && !ctrl_ddgst) || 12823f2304f8SSagi Grimberg (!queue->data_digest && ctrl_ddgst)) { 12833f2304f8SSagi Grimberg pr_err("queue %d: data digest mismatch host: %s ctrl: %s\n", 12843f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12853f2304f8SSagi Grimberg queue->data_digest ? "enabled" : "disabled", 12863f2304f8SSagi Grimberg ctrl_ddgst ? "enabled" : "disabled"); 12873f2304f8SSagi Grimberg goto free_icresp; 12883f2304f8SSagi Grimberg } 12893f2304f8SSagi Grimberg 12903f2304f8SSagi Grimberg ctrl_hdgst = !!(icresp->digest & NVME_TCP_HDR_DIGEST_ENABLE); 12913f2304f8SSagi Grimberg if ((queue->hdr_digest && !ctrl_hdgst) || 12923f2304f8SSagi Grimberg (!queue->hdr_digest && ctrl_hdgst)) { 12933f2304f8SSagi Grimberg pr_err("queue %d: header digest mismatch host: %s ctrl: %s\n", 12943f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12953f2304f8SSagi Grimberg queue->hdr_digest ? "enabled" : "disabled", 12963f2304f8SSagi Grimberg ctrl_hdgst ? "enabled" : "disabled"); 12973f2304f8SSagi Grimberg goto free_icresp; 12983f2304f8SSagi Grimberg } 12993f2304f8SSagi Grimberg 13003f2304f8SSagi Grimberg if (icresp->cpda != 0) { 13013f2304f8SSagi Grimberg pr_err("queue %d: unsupported cpda returned %d\n", 13023f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->cpda); 13033f2304f8SSagi Grimberg goto free_icresp; 13043f2304f8SSagi Grimberg } 13053f2304f8SSagi Grimberg 13063f2304f8SSagi Grimberg ret = 0; 13073f2304f8SSagi Grimberg free_icresp: 13083f2304f8SSagi Grimberg kfree(icresp); 13093f2304f8SSagi Grimberg free_icreq: 13103f2304f8SSagi Grimberg kfree(icreq); 13113f2304f8SSagi Grimberg return ret; 13123f2304f8SSagi Grimberg } 13133f2304f8SSagi Grimberg 131440510a63SSagi Grimberg static bool nvme_tcp_admin_queue(struct nvme_tcp_queue *queue) 131540510a63SSagi Grimberg { 131640510a63SSagi Grimberg return nvme_tcp_queue_id(queue) == 0; 131740510a63SSagi Grimberg } 131840510a63SSagi Grimberg 131940510a63SSagi Grimberg static bool nvme_tcp_default_queue(struct nvme_tcp_queue *queue) 132040510a63SSagi Grimberg { 132140510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 132240510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 132340510a63SSagi Grimberg 132440510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 132540510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT]; 132640510a63SSagi Grimberg } 132740510a63SSagi Grimberg 132840510a63SSagi Grimberg static bool nvme_tcp_read_queue(struct nvme_tcp_queue *queue) 132940510a63SSagi Grimberg { 133040510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 133140510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 133240510a63SSagi Grimberg 133340510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 133440510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 133540510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 133640510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 133740510a63SSagi Grimberg } 133840510a63SSagi Grimberg 133940510a63SSagi Grimberg static bool nvme_tcp_poll_queue(struct nvme_tcp_queue *queue) 134040510a63SSagi Grimberg { 134140510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 134240510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 134340510a63SSagi Grimberg 134440510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 134540510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 134640510a63SSagi Grimberg !nvme_tcp_read_queue(queue) && 134740510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 134840510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] + 134940510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 135040510a63SSagi Grimberg } 135140510a63SSagi Grimberg 135240510a63SSagi Grimberg static void nvme_tcp_set_queue_io_cpu(struct nvme_tcp_queue *queue) 135340510a63SSagi Grimberg { 135440510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 135540510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 135640510a63SSagi Grimberg int n = 0; 135740510a63SSagi Grimberg 135840510a63SSagi Grimberg if (nvme_tcp_default_queue(queue)) 135940510a63SSagi Grimberg n = qid - 1; 136040510a63SSagi Grimberg else if (nvme_tcp_read_queue(queue)) 136140510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 1; 136240510a63SSagi Grimberg else if (nvme_tcp_poll_queue(queue)) 136340510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 136440510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] - 1; 136540510a63SSagi Grimberg queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false); 136640510a63SSagi Grimberg } 136740510a63SSagi Grimberg 13683f2304f8SSagi Grimberg static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, 13693f2304f8SSagi Grimberg int qid, size_t queue_size) 13703f2304f8SSagi Grimberg { 13713f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 13723f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 13736ebf71baSChristoph Hellwig int ret, rcv_pdu_size; 13743f2304f8SSagi Grimberg 13753f2304f8SSagi Grimberg queue->ctrl = ctrl; 137615ec928aSSagi Grimberg init_llist_head(&queue->req_list); 13773f2304f8SSagi Grimberg INIT_LIST_HEAD(&queue->send_list); 1378db5ad6b7SSagi Grimberg mutex_init(&queue->send_mutex); 13793f2304f8SSagi Grimberg INIT_WORK(&queue->io_work, nvme_tcp_io_work); 13803f2304f8SSagi Grimberg queue->queue_size = queue_size; 13813f2304f8SSagi Grimberg 13823f2304f8SSagi Grimberg if (qid > 0) 13839924b030SIsrael Rukshin queue->cmnd_capsule_len = nctrl->ioccsz * 16; 13843f2304f8SSagi Grimberg else 13853f2304f8SSagi Grimberg queue->cmnd_capsule_len = sizeof(struct nvme_command) + 13863f2304f8SSagi Grimberg NVME_TCP_ADMIN_CCSZ; 13873f2304f8SSagi Grimberg 13883f2304f8SSagi Grimberg ret = sock_create(ctrl->addr.ss_family, SOCK_STREAM, 13893f2304f8SSagi Grimberg IPPROTO_TCP, &queue->sock); 13903f2304f8SSagi Grimberg if (ret) { 13919924b030SIsrael Rukshin dev_err(nctrl->device, 13923f2304f8SSagi Grimberg "failed to create socket: %d\n", ret); 13933f2304f8SSagi Grimberg return ret; 13943f2304f8SSagi Grimberg } 13953f2304f8SSagi Grimberg 13963f2304f8SSagi Grimberg /* Single syn retry */ 1397557eadfcSChristoph Hellwig tcp_sock_set_syncnt(queue->sock->sk, 1); 13983f2304f8SSagi Grimberg 13993f2304f8SSagi Grimberg /* Set TCP no delay */ 140012abc5eeSChristoph Hellwig tcp_sock_set_nodelay(queue->sock->sk); 14013f2304f8SSagi Grimberg 14023f2304f8SSagi Grimberg /* 14033f2304f8SSagi Grimberg * Cleanup whatever is sitting in the TCP transmit queue on socket 14043f2304f8SSagi Grimberg * close. This is done to prevent stale data from being sent should 14053f2304f8SSagi Grimberg * the network connection be restored before TCP times out. 14063f2304f8SSagi Grimberg */ 1407c433594cSChristoph Hellwig sock_no_linger(queue->sock->sk); 14083f2304f8SSagi Grimberg 14096e434967SChristoph Hellwig if (so_priority > 0) 14106e434967SChristoph Hellwig sock_set_priority(queue->sock->sk, so_priority); 14119912ade3SWunderlich, Mark 1412bb13985dSIsrael Rukshin /* Set socket type of service */ 14136ebf71baSChristoph Hellwig if (nctrl->opts->tos >= 0) 14146ebf71baSChristoph Hellwig ip_sock_set_tos(queue->sock->sk, nctrl->opts->tos); 1415bb13985dSIsrael Rukshin 1416adc99fd3SSagi Grimberg /* Set 10 seconds timeout for icresp recvmsg */ 1417adc99fd3SSagi Grimberg queue->sock->sk->sk_rcvtimeo = 10 * HZ; 1418adc99fd3SSagi Grimberg 14193f2304f8SSagi Grimberg queue->sock->sk->sk_allocation = GFP_ATOMIC; 142040510a63SSagi Grimberg nvme_tcp_set_queue_io_cpu(queue); 14213f2304f8SSagi Grimberg queue->request = NULL; 14223f2304f8SSagi Grimberg queue->data_remaining = 0; 14233f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 14243f2304f8SSagi Grimberg queue->pdu_remaining = 0; 14253f2304f8SSagi Grimberg queue->pdu_offset = 0; 14263f2304f8SSagi Grimberg sk_set_memalloc(queue->sock->sk); 14273f2304f8SSagi Grimberg 14289924b030SIsrael Rukshin if (nctrl->opts->mask & NVMF_OPT_HOST_TRADDR) { 14293f2304f8SSagi Grimberg ret = kernel_bind(queue->sock, (struct sockaddr *)&ctrl->src_addr, 14303f2304f8SSagi Grimberg sizeof(ctrl->src_addr)); 14313f2304f8SSagi Grimberg if (ret) { 14329924b030SIsrael Rukshin dev_err(nctrl->device, 14333f2304f8SSagi Grimberg "failed to bind queue %d socket %d\n", 14343f2304f8SSagi Grimberg qid, ret); 14353f2304f8SSagi Grimberg goto err_sock; 14363f2304f8SSagi Grimberg } 14373f2304f8SSagi Grimberg } 14383f2304f8SSagi Grimberg 14393f2304f8SSagi Grimberg queue->hdr_digest = nctrl->opts->hdr_digest; 14403f2304f8SSagi Grimberg queue->data_digest = nctrl->opts->data_digest; 14413f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) { 14423f2304f8SSagi Grimberg ret = nvme_tcp_alloc_crypto(queue); 14433f2304f8SSagi Grimberg if (ret) { 14449924b030SIsrael Rukshin dev_err(nctrl->device, 14453f2304f8SSagi Grimberg "failed to allocate queue %d crypto\n", qid); 14463f2304f8SSagi Grimberg goto err_sock; 14473f2304f8SSagi Grimberg } 14483f2304f8SSagi Grimberg } 14493f2304f8SSagi Grimberg 14503f2304f8SSagi Grimberg rcv_pdu_size = sizeof(struct nvme_tcp_rsp_pdu) + 14513f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 14523f2304f8SSagi Grimberg queue->pdu = kmalloc(rcv_pdu_size, GFP_KERNEL); 14533f2304f8SSagi Grimberg if (!queue->pdu) { 14543f2304f8SSagi Grimberg ret = -ENOMEM; 14553f2304f8SSagi Grimberg goto err_crypto; 14563f2304f8SSagi Grimberg } 14573f2304f8SSagi Grimberg 14589924b030SIsrael Rukshin dev_dbg(nctrl->device, "connecting queue %d\n", 14593f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 14603f2304f8SSagi Grimberg 14613f2304f8SSagi Grimberg ret = kernel_connect(queue->sock, (struct sockaddr *)&ctrl->addr, 14623f2304f8SSagi Grimberg sizeof(ctrl->addr), 0); 14633f2304f8SSagi Grimberg if (ret) { 14649924b030SIsrael Rukshin dev_err(nctrl->device, 14653f2304f8SSagi Grimberg "failed to connect socket: %d\n", ret); 14663f2304f8SSagi Grimberg goto err_rcv_pdu; 14673f2304f8SSagi Grimberg } 14683f2304f8SSagi Grimberg 14693f2304f8SSagi Grimberg ret = nvme_tcp_init_connection(queue); 14703f2304f8SSagi Grimberg if (ret) 14713f2304f8SSagi Grimberg goto err_init_connect; 14723f2304f8SSagi Grimberg 14733f2304f8SSagi Grimberg queue->rd_enabled = true; 14743f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_ALLOCATED, &queue->flags); 14753f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 14763f2304f8SSagi Grimberg 14773f2304f8SSagi Grimberg write_lock_bh(&queue->sock->sk->sk_callback_lock); 14783f2304f8SSagi Grimberg queue->sock->sk->sk_user_data = queue; 14793f2304f8SSagi Grimberg queue->state_change = queue->sock->sk->sk_state_change; 14803f2304f8SSagi Grimberg queue->data_ready = queue->sock->sk->sk_data_ready; 14813f2304f8SSagi Grimberg queue->write_space = queue->sock->sk->sk_write_space; 14823f2304f8SSagi Grimberg queue->sock->sk->sk_data_ready = nvme_tcp_data_ready; 14833f2304f8SSagi Grimberg queue->sock->sk->sk_state_change = nvme_tcp_state_change; 14843f2304f8SSagi Grimberg queue->sock->sk->sk_write_space = nvme_tcp_write_space; 1485ac1c4e18SSebastian Andrzej Siewior #ifdef CONFIG_NET_RX_BUSY_POLL 14861a9460ceSSagi Grimberg queue->sock->sk->sk_ll_usec = 1; 1487ac1c4e18SSebastian Andrzej Siewior #endif 14883f2304f8SSagi Grimberg write_unlock_bh(&queue->sock->sk->sk_callback_lock); 14893f2304f8SSagi Grimberg 14903f2304f8SSagi Grimberg return 0; 14913f2304f8SSagi Grimberg 14923f2304f8SSagi Grimberg err_init_connect: 14933f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 14943f2304f8SSagi Grimberg err_rcv_pdu: 14953f2304f8SSagi Grimberg kfree(queue->pdu); 14963f2304f8SSagi Grimberg err_crypto: 14973f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 14983f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 14993f2304f8SSagi Grimberg err_sock: 15003f2304f8SSagi Grimberg sock_release(queue->sock); 15013f2304f8SSagi Grimberg queue->sock = NULL; 15023f2304f8SSagi Grimberg return ret; 15033f2304f8SSagi Grimberg } 15043f2304f8SSagi Grimberg 15053f2304f8SSagi Grimberg static void nvme_tcp_restore_sock_calls(struct nvme_tcp_queue *queue) 15063f2304f8SSagi Grimberg { 15073f2304f8SSagi Grimberg struct socket *sock = queue->sock; 15083f2304f8SSagi Grimberg 15093f2304f8SSagi Grimberg write_lock_bh(&sock->sk->sk_callback_lock); 15103f2304f8SSagi Grimberg sock->sk->sk_user_data = NULL; 15113f2304f8SSagi Grimberg sock->sk->sk_data_ready = queue->data_ready; 15123f2304f8SSagi Grimberg sock->sk->sk_state_change = queue->state_change; 15133f2304f8SSagi Grimberg sock->sk->sk_write_space = queue->write_space; 15143f2304f8SSagi Grimberg write_unlock_bh(&sock->sk->sk_callback_lock); 15153f2304f8SSagi Grimberg } 15163f2304f8SSagi Grimberg 15173f2304f8SSagi Grimberg static void __nvme_tcp_stop_queue(struct nvme_tcp_queue *queue) 15183f2304f8SSagi Grimberg { 15193f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 15203f2304f8SSagi Grimberg nvme_tcp_restore_sock_calls(queue); 15213f2304f8SSagi Grimberg cancel_work_sync(&queue->io_work); 15223f2304f8SSagi Grimberg } 15233f2304f8SSagi Grimberg 15243f2304f8SSagi Grimberg static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid) 15253f2304f8SSagi Grimberg { 15263f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15273f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 15283f2304f8SSagi Grimberg 15293f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_LIVE, &queue->flags)) 15303f2304f8SSagi Grimberg return; 15313f2304f8SSagi Grimberg __nvme_tcp_stop_queue(queue); 15323f2304f8SSagi Grimberg } 15333f2304f8SSagi Grimberg 15343f2304f8SSagi Grimberg static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx) 15353f2304f8SSagi Grimberg { 15363f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15373f2304f8SSagi Grimberg int ret; 15383f2304f8SSagi Grimberg 15393f2304f8SSagi Grimberg if (idx) 154026c68227SSagi Grimberg ret = nvmf_connect_io_queue(nctrl, idx, false); 15413f2304f8SSagi Grimberg else 15423f2304f8SSagi Grimberg ret = nvmf_connect_admin_queue(nctrl); 15433f2304f8SSagi Grimberg 15443f2304f8SSagi Grimberg if (!ret) { 15453f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_LIVE, &ctrl->queues[idx].flags); 15463f2304f8SSagi Grimberg } else { 1547f34e2589SSagi Grimberg if (test_bit(NVME_TCP_Q_ALLOCATED, &ctrl->queues[idx].flags)) 15483f2304f8SSagi Grimberg __nvme_tcp_stop_queue(&ctrl->queues[idx]); 15493f2304f8SSagi Grimberg dev_err(nctrl->device, 15503f2304f8SSagi Grimberg "failed to connect queue: %d ret=%d\n", idx, ret); 15513f2304f8SSagi Grimberg } 15523f2304f8SSagi Grimberg return ret; 15533f2304f8SSagi Grimberg } 15543f2304f8SSagi Grimberg 15553f2304f8SSagi Grimberg static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl, 15563f2304f8SSagi Grimberg bool admin) 15573f2304f8SSagi Grimberg { 15583f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15593f2304f8SSagi Grimberg struct blk_mq_tag_set *set; 15603f2304f8SSagi Grimberg int ret; 15613f2304f8SSagi Grimberg 15623f2304f8SSagi Grimberg if (admin) { 15633f2304f8SSagi Grimberg set = &ctrl->admin_tag_set; 15643f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15653f2304f8SSagi Grimberg set->ops = &nvme_tcp_admin_mq_ops; 15663f2304f8SSagi Grimberg set->queue_depth = NVME_AQ_MQ_TAG_DEPTH; 15673f2304f8SSagi Grimberg set->reserved_tags = 2; /* connect + keep-alive */ 1568610c8235SMax Gurtovoy set->numa_node = nctrl->numa_node; 1569db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_BLOCKING; 15703f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15713f2304f8SSagi Grimberg set->driver_data = ctrl; 15723f2304f8SSagi Grimberg set->nr_hw_queues = 1; 15733f2304f8SSagi Grimberg set->timeout = ADMIN_TIMEOUT; 15743f2304f8SSagi Grimberg } else { 15753f2304f8SSagi Grimberg set = &ctrl->tag_set; 15763f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15773f2304f8SSagi Grimberg set->ops = &nvme_tcp_mq_ops; 15783f2304f8SSagi Grimberg set->queue_depth = nctrl->sqsize + 1; 15793f2304f8SSagi Grimberg set->reserved_tags = 1; /* fabric connect */ 1580610c8235SMax Gurtovoy set->numa_node = nctrl->numa_node; 1581db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; 15823f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15833f2304f8SSagi Grimberg set->driver_data = ctrl; 15843f2304f8SSagi Grimberg set->nr_hw_queues = nctrl->queue_count - 1; 15853f2304f8SSagi Grimberg set->timeout = NVME_IO_TIMEOUT; 15861a9460ceSSagi Grimberg set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2; 15873f2304f8SSagi Grimberg } 15883f2304f8SSagi Grimberg 15893f2304f8SSagi Grimberg ret = blk_mq_alloc_tag_set(set); 15903f2304f8SSagi Grimberg if (ret) 15913f2304f8SSagi Grimberg return ERR_PTR(ret); 15923f2304f8SSagi Grimberg 15933f2304f8SSagi Grimberg return set; 15943f2304f8SSagi Grimberg } 15953f2304f8SSagi Grimberg 15963f2304f8SSagi Grimberg static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl) 15973f2304f8SSagi Grimberg { 15983f2304f8SSagi Grimberg if (to_tcp_ctrl(ctrl)->async_req.pdu) { 15993f2304f8SSagi Grimberg nvme_tcp_free_async_req(to_tcp_ctrl(ctrl)); 16003f2304f8SSagi Grimberg to_tcp_ctrl(ctrl)->async_req.pdu = NULL; 16013f2304f8SSagi Grimberg } 16023f2304f8SSagi Grimberg 16033f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16043f2304f8SSagi Grimberg } 16053f2304f8SSagi Grimberg 16063f2304f8SSagi Grimberg static void nvme_tcp_free_io_queues(struct nvme_ctrl *ctrl) 16073f2304f8SSagi Grimberg { 16083f2304f8SSagi Grimberg int i; 16093f2304f8SSagi Grimberg 16103f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16113f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16123f2304f8SSagi Grimberg } 16133f2304f8SSagi Grimberg 16143f2304f8SSagi Grimberg static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl) 16153f2304f8SSagi Grimberg { 16163f2304f8SSagi Grimberg int i; 16173f2304f8SSagi Grimberg 16183f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16193f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16203f2304f8SSagi Grimberg } 16213f2304f8SSagi Grimberg 16223f2304f8SSagi Grimberg static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl) 16233f2304f8SSagi Grimberg { 16243f2304f8SSagi Grimberg int i, ret = 0; 16253f2304f8SSagi Grimberg 16263f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16273f2304f8SSagi Grimberg ret = nvme_tcp_start_queue(ctrl, i); 16283f2304f8SSagi Grimberg if (ret) 16293f2304f8SSagi Grimberg goto out_stop_queues; 16303f2304f8SSagi Grimberg } 16313f2304f8SSagi Grimberg 16323f2304f8SSagi Grimberg return 0; 16333f2304f8SSagi Grimberg 16343f2304f8SSagi Grimberg out_stop_queues: 16353f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16363f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16373f2304f8SSagi Grimberg return ret; 16383f2304f8SSagi Grimberg } 16393f2304f8SSagi Grimberg 16403f2304f8SSagi Grimberg static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl) 16413f2304f8SSagi Grimberg { 16423f2304f8SSagi Grimberg int ret; 16433f2304f8SSagi Grimberg 16443f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, 0, NVME_AQ_DEPTH); 16453f2304f8SSagi Grimberg if (ret) 16463f2304f8SSagi Grimberg return ret; 16473f2304f8SSagi Grimberg 16483f2304f8SSagi Grimberg ret = nvme_tcp_alloc_async_req(to_tcp_ctrl(ctrl)); 16493f2304f8SSagi Grimberg if (ret) 16503f2304f8SSagi Grimberg goto out_free_queue; 16513f2304f8SSagi Grimberg 16523f2304f8SSagi Grimberg return 0; 16533f2304f8SSagi Grimberg 16543f2304f8SSagi Grimberg out_free_queue: 16553f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16563f2304f8SSagi Grimberg return ret; 16573f2304f8SSagi Grimberg } 16583f2304f8SSagi Grimberg 1659efb973b1SSagi Grimberg static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 16603f2304f8SSagi Grimberg { 16613f2304f8SSagi Grimberg int i, ret; 16623f2304f8SSagi Grimberg 16633f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16643f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, i, 16653f2304f8SSagi Grimberg ctrl->sqsize + 1); 16663f2304f8SSagi Grimberg if (ret) 16673f2304f8SSagi Grimberg goto out_free_queues; 16683f2304f8SSagi Grimberg } 16693f2304f8SSagi Grimberg 16703f2304f8SSagi Grimberg return 0; 16713f2304f8SSagi Grimberg 16723f2304f8SSagi Grimberg out_free_queues: 16733f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16743f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16753f2304f8SSagi Grimberg 16763f2304f8SSagi Grimberg return ret; 16773f2304f8SSagi Grimberg } 16783f2304f8SSagi Grimberg 16793f2304f8SSagi Grimberg static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl) 16803f2304f8SSagi Grimberg { 1681873946f4SSagi Grimberg unsigned int nr_io_queues; 1682873946f4SSagi Grimberg 1683873946f4SSagi Grimberg nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus()); 1684873946f4SSagi Grimberg nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus()); 16851a9460ceSSagi Grimberg nr_io_queues += min(ctrl->opts->nr_poll_queues, num_online_cpus()); 1686873946f4SSagi Grimberg 1687873946f4SSagi Grimberg return nr_io_queues; 16883f2304f8SSagi Grimberg } 16893f2304f8SSagi Grimberg 169064861993SSagi Grimberg static void nvme_tcp_set_io_queues(struct nvme_ctrl *nctrl, 169164861993SSagi Grimberg unsigned int nr_io_queues) 169264861993SSagi Grimberg { 169364861993SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 169464861993SSagi Grimberg struct nvmf_ctrl_options *opts = nctrl->opts; 169564861993SSagi Grimberg 169664861993SSagi Grimberg if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) { 169764861993SSagi Grimberg /* 169864861993SSagi Grimberg * separate read/write queues 169964861993SSagi Grimberg * hand out dedicated default queues only after we have 170064861993SSagi Grimberg * sufficient read queues. 170164861993SSagi Grimberg */ 170264861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues; 170364861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ]; 170464861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 170564861993SSagi Grimberg min(opts->nr_write_queues, nr_io_queues); 170664861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 170764861993SSagi Grimberg } else { 170864861993SSagi Grimberg /* 170964861993SSagi Grimberg * shared read/write queues 171064861993SSagi Grimberg * either no write queues were requested, or we don't have 171164861993SSagi Grimberg * sufficient queue count to have dedicated default queues. 171264861993SSagi Grimberg */ 171364861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 171464861993SSagi Grimberg min(opts->nr_io_queues, nr_io_queues); 171564861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 171664861993SSagi Grimberg } 17171a9460ceSSagi Grimberg 17181a9460ceSSagi Grimberg if (opts->nr_poll_queues && nr_io_queues) { 17191a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 17201a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL] = 17211a9460ceSSagi Grimberg min(opts->nr_poll_queues, nr_io_queues); 17221a9460ceSSagi Grimberg } 172364861993SSagi Grimberg } 172464861993SSagi Grimberg 1725efb973b1SSagi Grimberg static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 17263f2304f8SSagi Grimberg { 17273f2304f8SSagi Grimberg unsigned int nr_io_queues; 17283f2304f8SSagi Grimberg int ret; 17293f2304f8SSagi Grimberg 17303f2304f8SSagi Grimberg nr_io_queues = nvme_tcp_nr_io_queues(ctrl); 17313f2304f8SSagi Grimberg ret = nvme_set_queue_count(ctrl, &nr_io_queues); 17323f2304f8SSagi Grimberg if (ret) 17333f2304f8SSagi Grimberg return ret; 17343f2304f8SSagi Grimberg 17353f2304f8SSagi Grimberg ctrl->queue_count = nr_io_queues + 1; 17363f2304f8SSagi Grimberg if (ctrl->queue_count < 2) 17373f2304f8SSagi Grimberg return 0; 17383f2304f8SSagi Grimberg 17393f2304f8SSagi Grimberg dev_info(ctrl->device, 17403f2304f8SSagi Grimberg "creating %d I/O queues.\n", nr_io_queues); 17413f2304f8SSagi Grimberg 174264861993SSagi Grimberg nvme_tcp_set_io_queues(ctrl, nr_io_queues); 174364861993SSagi Grimberg 1744efb973b1SSagi Grimberg return __nvme_tcp_alloc_io_queues(ctrl); 17453f2304f8SSagi Grimberg } 17463f2304f8SSagi Grimberg 17473f2304f8SSagi Grimberg static void nvme_tcp_destroy_io_queues(struct nvme_ctrl *ctrl, bool remove) 17483f2304f8SSagi Grimberg { 17493f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 17503f2304f8SSagi Grimberg if (remove) { 17513f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 17523f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 17533f2304f8SSagi Grimberg } 17543f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 17553f2304f8SSagi Grimberg } 17563f2304f8SSagi Grimberg 17573f2304f8SSagi Grimberg static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) 17583f2304f8SSagi Grimberg { 17593f2304f8SSagi Grimberg int ret; 17603f2304f8SSagi Grimberg 1761efb973b1SSagi Grimberg ret = nvme_tcp_alloc_io_queues(ctrl); 17623f2304f8SSagi Grimberg if (ret) 17633f2304f8SSagi Grimberg return ret; 17643f2304f8SSagi Grimberg 17653f2304f8SSagi Grimberg if (new) { 17663f2304f8SSagi Grimberg ctrl->tagset = nvme_tcp_alloc_tagset(ctrl, false); 17673f2304f8SSagi Grimberg if (IS_ERR(ctrl->tagset)) { 17683f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->tagset); 17693f2304f8SSagi Grimberg goto out_free_io_queues; 17703f2304f8SSagi Grimberg } 17713f2304f8SSagi Grimberg 17723f2304f8SSagi Grimberg ctrl->connect_q = blk_mq_init_queue(ctrl->tagset); 17733f2304f8SSagi Grimberg if (IS_ERR(ctrl->connect_q)) { 17743f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->connect_q); 17753f2304f8SSagi Grimberg goto out_free_tag_set; 17763f2304f8SSagi Grimberg } 17773f2304f8SSagi Grimberg } 17783f2304f8SSagi Grimberg 17793f2304f8SSagi Grimberg ret = nvme_tcp_start_io_queues(ctrl); 17803f2304f8SSagi Grimberg if (ret) 17813f2304f8SSagi Grimberg goto out_cleanup_connect_q; 17823f2304f8SSagi Grimberg 17832875b0aeSSagi Grimberg if (!new) { 17842875b0aeSSagi Grimberg nvme_start_queues(ctrl); 17852875b0aeSSagi Grimberg nvme_wait_freeze(ctrl); 17862875b0aeSSagi Grimberg blk_mq_update_nr_hw_queues(ctrl->tagset, 17872875b0aeSSagi Grimberg ctrl->queue_count - 1); 17882875b0aeSSagi Grimberg nvme_unfreeze(ctrl); 17892875b0aeSSagi Grimberg } 17902875b0aeSSagi Grimberg 17913f2304f8SSagi Grimberg return 0; 17923f2304f8SSagi Grimberg 17933f2304f8SSagi Grimberg out_cleanup_connect_q: 1794e85037a2SSagi Grimberg if (new) 17953f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 17963f2304f8SSagi Grimberg out_free_tag_set: 17973f2304f8SSagi Grimberg if (new) 17983f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 17993f2304f8SSagi Grimberg out_free_io_queues: 18003f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 18013f2304f8SSagi Grimberg return ret; 18023f2304f8SSagi Grimberg } 18033f2304f8SSagi Grimberg 18043f2304f8SSagi Grimberg static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove) 18053f2304f8SSagi Grimberg { 18063f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18073f2304f8SSagi Grimberg if (remove) { 18083f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1809e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18103f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 18113f2304f8SSagi Grimberg } 18123f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 18133f2304f8SSagi Grimberg } 18143f2304f8SSagi Grimberg 18153f2304f8SSagi Grimberg static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) 18163f2304f8SSagi Grimberg { 18173f2304f8SSagi Grimberg int error; 18183f2304f8SSagi Grimberg 18193f2304f8SSagi Grimberg error = nvme_tcp_alloc_admin_queue(ctrl); 18203f2304f8SSagi Grimberg if (error) 18213f2304f8SSagi Grimberg return error; 18223f2304f8SSagi Grimberg 18233f2304f8SSagi Grimberg if (new) { 18243f2304f8SSagi Grimberg ctrl->admin_tagset = nvme_tcp_alloc_tagset(ctrl, true); 18253f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_tagset)) { 18263f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_tagset); 18273f2304f8SSagi Grimberg goto out_free_queue; 18283f2304f8SSagi Grimberg } 18293f2304f8SSagi Grimberg 1830e7832cb4SSagi Grimberg ctrl->fabrics_q = blk_mq_init_queue(ctrl->admin_tagset); 1831e7832cb4SSagi Grimberg if (IS_ERR(ctrl->fabrics_q)) { 1832e7832cb4SSagi Grimberg error = PTR_ERR(ctrl->fabrics_q); 1833e7832cb4SSagi Grimberg goto out_free_tagset; 1834e7832cb4SSagi Grimberg } 1835e7832cb4SSagi Grimberg 18363f2304f8SSagi Grimberg ctrl->admin_q = blk_mq_init_queue(ctrl->admin_tagset); 18373f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_q)) { 18383f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_q); 1839e7832cb4SSagi Grimberg goto out_cleanup_fabrics_q; 18403f2304f8SSagi Grimberg } 18413f2304f8SSagi Grimberg } 18423f2304f8SSagi Grimberg 18433f2304f8SSagi Grimberg error = nvme_tcp_start_queue(ctrl, 0); 18443f2304f8SSagi Grimberg if (error) 18453f2304f8SSagi Grimberg goto out_cleanup_queue; 18463f2304f8SSagi Grimberg 1847c0f2f45bSSagi Grimberg error = nvme_enable_ctrl(ctrl); 18483f2304f8SSagi Grimberg if (error) 18493f2304f8SSagi Grimberg goto out_stop_queue; 18503f2304f8SSagi Grimberg 1851e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 1852e7832cb4SSagi Grimberg 18533f2304f8SSagi Grimberg error = nvme_init_identify(ctrl); 18543f2304f8SSagi Grimberg if (error) 18553f2304f8SSagi Grimberg goto out_stop_queue; 18563f2304f8SSagi Grimberg 18573f2304f8SSagi Grimberg return 0; 18583f2304f8SSagi Grimberg 18593f2304f8SSagi Grimberg out_stop_queue: 18603f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18613f2304f8SSagi Grimberg out_cleanup_queue: 18623f2304f8SSagi Grimberg if (new) 18633f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1864e7832cb4SSagi Grimberg out_cleanup_fabrics_q: 1865e7832cb4SSagi Grimberg if (new) 1866e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18673f2304f8SSagi Grimberg out_free_tagset: 18683f2304f8SSagi Grimberg if (new) 18693f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 18703f2304f8SSagi Grimberg out_free_queue: 18713f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 18723f2304f8SSagi Grimberg return error; 18733f2304f8SSagi Grimberg } 18743f2304f8SSagi Grimberg 18753f2304f8SSagi Grimberg static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, 18763f2304f8SSagi Grimberg bool remove) 18773f2304f8SSagi Grimberg { 1878d4d61470SSagi Grimberg mutex_lock(&to_tcp_ctrl(ctrl)->teardown_lock); 18793f2304f8SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 18803f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 1881622b8b68SMing Lei if (ctrl->admin_tagset) { 18827a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->admin_tagset, 18837a425896SSagi Grimberg nvme_cancel_request, ctrl); 1884622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->admin_tagset); 1885622b8b68SMing Lei } 1886e7832cb4SSagi Grimberg if (remove) 18873f2304f8SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 18883f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, remove); 1889d4d61470SSagi Grimberg mutex_unlock(&to_tcp_ctrl(ctrl)->teardown_lock); 18903f2304f8SSagi Grimberg } 18913f2304f8SSagi Grimberg 18923f2304f8SSagi Grimberg static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl, 18933f2304f8SSagi Grimberg bool remove) 18943f2304f8SSagi Grimberg { 1895d4d61470SSagi Grimberg mutex_lock(&to_tcp_ctrl(ctrl)->teardown_lock); 18963f2304f8SSagi Grimberg if (ctrl->queue_count <= 1) 1897d4d61470SSagi Grimberg goto out; 1898d4d61470SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 18992875b0aeSSagi Grimberg nvme_start_freeze(ctrl); 19003f2304f8SSagi Grimberg nvme_stop_queues(ctrl); 19013f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 1902622b8b68SMing Lei if (ctrl->tagset) { 19037a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->tagset, 19047a425896SSagi Grimberg nvme_cancel_request, ctrl); 1905622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->tagset); 1906622b8b68SMing Lei } 19073f2304f8SSagi Grimberg if (remove) 19083f2304f8SSagi Grimberg nvme_start_queues(ctrl); 19093f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, remove); 1910d4d61470SSagi Grimberg out: 1911d4d61470SSagi Grimberg mutex_unlock(&to_tcp_ctrl(ctrl)->teardown_lock); 19123f2304f8SSagi Grimberg } 19133f2304f8SSagi Grimberg 19143f2304f8SSagi Grimberg static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl) 19153f2304f8SSagi Grimberg { 19163f2304f8SSagi Grimberg /* If we are resetting/deleting then do nothing */ 19173f2304f8SSagi Grimberg if (ctrl->state != NVME_CTRL_CONNECTING) { 19183f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state == NVME_CTRL_NEW || 19193f2304f8SSagi Grimberg ctrl->state == NVME_CTRL_LIVE); 19203f2304f8SSagi Grimberg return; 19213f2304f8SSagi Grimberg } 19223f2304f8SSagi Grimberg 19233f2304f8SSagi Grimberg if (nvmf_should_reconnect(ctrl)) { 19243f2304f8SSagi Grimberg dev_info(ctrl->device, "Reconnecting in %d seconds...\n", 19253f2304f8SSagi Grimberg ctrl->opts->reconnect_delay); 19263f2304f8SSagi Grimberg queue_delayed_work(nvme_wq, &to_tcp_ctrl(ctrl)->connect_work, 19273f2304f8SSagi Grimberg ctrl->opts->reconnect_delay * HZ); 19283f2304f8SSagi Grimberg } else { 19293f2304f8SSagi Grimberg dev_info(ctrl->device, "Removing controller...\n"); 19303f2304f8SSagi Grimberg nvme_delete_ctrl(ctrl); 19313f2304f8SSagi Grimberg } 19323f2304f8SSagi Grimberg } 19333f2304f8SSagi Grimberg 19343f2304f8SSagi Grimberg static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) 19353f2304f8SSagi Grimberg { 19363f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->opts; 1937312910f4SColin Ian King int ret; 19383f2304f8SSagi Grimberg 19393f2304f8SSagi Grimberg ret = nvme_tcp_configure_admin_queue(ctrl, new); 19403f2304f8SSagi Grimberg if (ret) 19413f2304f8SSagi Grimberg return ret; 19423f2304f8SSagi Grimberg 19433f2304f8SSagi Grimberg if (ctrl->icdoff) { 19443f2304f8SSagi Grimberg dev_err(ctrl->device, "icdoff is not supported!\n"); 19453f2304f8SSagi Grimberg goto destroy_admin; 19463f2304f8SSagi Grimberg } 19473f2304f8SSagi Grimberg 19483f2304f8SSagi Grimberg if (opts->queue_size > ctrl->sqsize + 1) 19493f2304f8SSagi Grimberg dev_warn(ctrl->device, 19503f2304f8SSagi Grimberg "queue_size %zu > ctrl sqsize %u, clamping down\n", 19513f2304f8SSagi Grimberg opts->queue_size, ctrl->sqsize + 1); 19523f2304f8SSagi Grimberg 19533f2304f8SSagi Grimberg if (ctrl->sqsize + 1 > ctrl->maxcmd) { 19543f2304f8SSagi Grimberg dev_warn(ctrl->device, 19553f2304f8SSagi Grimberg "sqsize %u > ctrl maxcmd %u, clamping down\n", 19563f2304f8SSagi Grimberg ctrl->sqsize + 1, ctrl->maxcmd); 19573f2304f8SSagi Grimberg ctrl->sqsize = ctrl->maxcmd - 1; 19583f2304f8SSagi Grimberg } 19593f2304f8SSagi Grimberg 19603f2304f8SSagi Grimberg if (ctrl->queue_count > 1) { 19613f2304f8SSagi Grimberg ret = nvme_tcp_configure_io_queues(ctrl, new); 19623f2304f8SSagi Grimberg if (ret) 19633f2304f8SSagi Grimberg goto destroy_admin; 19643f2304f8SSagi Grimberg } 19653f2304f8SSagi Grimberg 19663f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) { 1967bea54ef5SIsrael Rukshin /* 1968ecca390eSSagi Grimberg * state change failure is ok if we started ctrl delete, 1969bea54ef5SIsrael Rukshin * unless we're during creation of a new controller to 1970bea54ef5SIsrael Rukshin * avoid races with teardown flow. 1971bea54ef5SIsrael Rukshin */ 1972ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 1973ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 1974bea54ef5SIsrael Rukshin WARN_ON_ONCE(new); 19753f2304f8SSagi Grimberg ret = -EINVAL; 19763f2304f8SSagi Grimberg goto destroy_io; 19773f2304f8SSagi Grimberg } 19783f2304f8SSagi Grimberg 19793f2304f8SSagi Grimberg nvme_start_ctrl(ctrl); 19803f2304f8SSagi Grimberg return 0; 19813f2304f8SSagi Grimberg 19823f2304f8SSagi Grimberg destroy_io: 19833f2304f8SSagi Grimberg if (ctrl->queue_count > 1) 19843f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, new); 19853f2304f8SSagi Grimberg destroy_admin: 19863f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 19873f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, new); 19883f2304f8SSagi Grimberg return ret; 19893f2304f8SSagi Grimberg } 19903f2304f8SSagi Grimberg 19913f2304f8SSagi Grimberg static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work) 19923f2304f8SSagi Grimberg { 19933f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(to_delayed_work(work), 19943f2304f8SSagi Grimberg struct nvme_tcp_ctrl, connect_work); 19953f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 19963f2304f8SSagi Grimberg 19973f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 19983f2304f8SSagi Grimberg 19993f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 20003f2304f8SSagi Grimberg goto requeue; 20013f2304f8SSagi Grimberg 200256a77d26SColin Ian King dev_info(ctrl->device, "Successfully reconnected (%d attempt)\n", 20033f2304f8SSagi Grimberg ctrl->nr_reconnects); 20043f2304f8SSagi Grimberg 20053f2304f8SSagi Grimberg ctrl->nr_reconnects = 0; 20063f2304f8SSagi Grimberg 20073f2304f8SSagi Grimberg return; 20083f2304f8SSagi Grimberg 20093f2304f8SSagi Grimberg requeue: 20103f2304f8SSagi Grimberg dev_info(ctrl->device, "Failed reconnect attempt %d\n", 20113f2304f8SSagi Grimberg ctrl->nr_reconnects); 20123f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20133f2304f8SSagi Grimberg } 20143f2304f8SSagi Grimberg 20153f2304f8SSagi Grimberg static void nvme_tcp_error_recovery_work(struct work_struct *work) 20163f2304f8SSagi Grimberg { 20173f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(work, 20183f2304f8SSagi Grimberg struct nvme_tcp_ctrl, err_work); 20193f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 20203f2304f8SSagi Grimberg 20213f2304f8SSagi Grimberg nvme_stop_keep_alive(ctrl); 20223f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, false); 20233f2304f8SSagi Grimberg /* unquiesce to fail fast pending requests */ 20243f2304f8SSagi Grimberg nvme_start_queues(ctrl); 20253f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, false); 2026e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 20273f2304f8SSagi Grimberg 20283f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 2029ecca390eSSagi Grimberg /* state change failure is ok if we started ctrl delete */ 2030ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 2031ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 20323f2304f8SSagi Grimberg return; 20333f2304f8SSagi Grimberg } 20343f2304f8SSagi Grimberg 20353f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20363f2304f8SSagi Grimberg } 20373f2304f8SSagi Grimberg 20383f2304f8SSagi Grimberg static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown) 20393f2304f8SSagi Grimberg { 2040794a4cb3SSagi Grimberg cancel_work_sync(&to_tcp_ctrl(ctrl)->err_work); 2041794a4cb3SSagi Grimberg cancel_delayed_work_sync(&to_tcp_ctrl(ctrl)->connect_work); 2042794a4cb3SSagi Grimberg 20433f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, shutdown); 2044e7832cb4SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 20453f2304f8SSagi Grimberg if (shutdown) 20463f2304f8SSagi Grimberg nvme_shutdown_ctrl(ctrl); 20473f2304f8SSagi Grimberg else 2048b5b05048SSagi Grimberg nvme_disable_ctrl(ctrl); 20493f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, shutdown); 20503f2304f8SSagi Grimberg } 20513f2304f8SSagi Grimberg 20523f2304f8SSagi Grimberg static void nvme_tcp_delete_ctrl(struct nvme_ctrl *ctrl) 20533f2304f8SSagi Grimberg { 20543f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, true); 20553f2304f8SSagi Grimberg } 20563f2304f8SSagi Grimberg 20573f2304f8SSagi Grimberg static void nvme_reset_ctrl_work(struct work_struct *work) 20583f2304f8SSagi Grimberg { 20593f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = 20603f2304f8SSagi Grimberg container_of(work, struct nvme_ctrl, reset_work); 20613f2304f8SSagi Grimberg 20623f2304f8SSagi Grimberg nvme_stop_ctrl(ctrl); 20633f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, false); 20643f2304f8SSagi Grimberg 20653f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 2066ecca390eSSagi Grimberg /* state change failure is ok if we started ctrl delete */ 2067ecca390eSSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING && 2068ecca390eSSagi Grimberg ctrl->state != NVME_CTRL_DELETING_NOIO); 20693f2304f8SSagi Grimberg return; 20703f2304f8SSagi Grimberg } 20713f2304f8SSagi Grimberg 20723f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 20733f2304f8SSagi Grimberg goto out_fail; 20743f2304f8SSagi Grimberg 20753f2304f8SSagi Grimberg return; 20763f2304f8SSagi Grimberg 20773f2304f8SSagi Grimberg out_fail: 20783f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 20793f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20803f2304f8SSagi Grimberg } 20813f2304f8SSagi Grimberg 20823f2304f8SSagi Grimberg static void nvme_tcp_free_ctrl(struct nvme_ctrl *nctrl) 20833f2304f8SSagi Grimberg { 20843f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 20853f2304f8SSagi Grimberg 20863f2304f8SSagi Grimberg if (list_empty(&ctrl->list)) 20873f2304f8SSagi Grimberg goto free_ctrl; 20883f2304f8SSagi Grimberg 20893f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 20903f2304f8SSagi Grimberg list_del(&ctrl->list); 20913f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 20923f2304f8SSagi Grimberg 20933f2304f8SSagi Grimberg nvmf_free_options(nctrl->opts); 20943f2304f8SSagi Grimberg free_ctrl: 20953f2304f8SSagi Grimberg kfree(ctrl->queues); 20963f2304f8SSagi Grimberg kfree(ctrl); 20973f2304f8SSagi Grimberg } 20983f2304f8SSagi Grimberg 20993f2304f8SSagi Grimberg static void nvme_tcp_set_sg_null(struct nvme_command *c) 21003f2304f8SSagi Grimberg { 21013f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21023f2304f8SSagi Grimberg 21033f2304f8SSagi Grimberg sg->addr = 0; 21043f2304f8SSagi Grimberg sg->length = 0; 21053f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 21063f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 21073f2304f8SSagi Grimberg } 21083f2304f8SSagi Grimberg 21093f2304f8SSagi Grimberg static void nvme_tcp_set_sg_inline(struct nvme_tcp_queue *queue, 21103f2304f8SSagi Grimberg struct nvme_command *c, u32 data_len) 21113f2304f8SSagi Grimberg { 21123f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21133f2304f8SSagi Grimberg 21143f2304f8SSagi Grimberg sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); 21153f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21163f2304f8SSagi Grimberg sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; 21173f2304f8SSagi Grimberg } 21183f2304f8SSagi Grimberg 21193f2304f8SSagi Grimberg static void nvme_tcp_set_sg_host_data(struct nvme_command *c, 21203f2304f8SSagi Grimberg u32 data_len) 21213f2304f8SSagi Grimberg { 21223f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21233f2304f8SSagi Grimberg 21243f2304f8SSagi Grimberg sg->addr = 0; 21253f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21263f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 21273f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 21283f2304f8SSagi Grimberg } 21293f2304f8SSagi Grimberg 21303f2304f8SSagi Grimberg static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg) 21313f2304f8SSagi Grimberg { 21323f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(arg); 21333f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 21343f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = ctrl->async_req.pdu; 21353f2304f8SSagi Grimberg struct nvme_command *cmd = &pdu->cmd; 21363f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 21373f2304f8SSagi Grimberg 21383f2304f8SSagi Grimberg memset(pdu, 0, sizeof(*pdu)); 21393f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 21403f2304f8SSagi Grimberg if (queue->hdr_digest) 21413f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 21423f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 21433f2304f8SSagi Grimberg pdu->hdr.plen = cpu_to_le32(pdu->hdr.hlen + hdgst); 21443f2304f8SSagi Grimberg 21453f2304f8SSagi Grimberg cmd->common.opcode = nvme_admin_async_event; 21463f2304f8SSagi Grimberg cmd->common.command_id = NVME_AQ_BLK_MQ_DEPTH; 21473f2304f8SSagi Grimberg cmd->common.flags |= NVME_CMD_SGL_METABUF; 21483f2304f8SSagi Grimberg nvme_tcp_set_sg_null(cmd); 21493f2304f8SSagi Grimberg 21503f2304f8SSagi Grimberg ctrl->async_req.state = NVME_TCP_SEND_CMD_PDU; 21513f2304f8SSagi Grimberg ctrl->async_req.offset = 0; 21523f2304f8SSagi Grimberg ctrl->async_req.curr_bio = NULL; 21533f2304f8SSagi Grimberg ctrl->async_req.data_len = 0; 21543f2304f8SSagi Grimberg 215586f0348aSSagi Grimberg nvme_tcp_queue_request(&ctrl->async_req, true, true); 21563f2304f8SSagi Grimberg } 21573f2304f8SSagi Grimberg 21583f2304f8SSagi Grimberg static enum blk_eh_timer_return 21593f2304f8SSagi Grimberg nvme_tcp_timeout(struct request *rq, bool reserved) 21603f2304f8SSagi Grimberg { 21613f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 21623f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = req->queue->ctrl; 21633f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 21643f2304f8SSagi Grimberg 216592b98e88SKeith Busch /* 216692b98e88SKeith Busch * Restart the timer if a controller reset is already scheduled. Any 216792b98e88SKeith Busch * timed out commands would be handled before entering the connecting 216892b98e88SKeith Busch * state. 216992b98e88SKeith Busch */ 217092b98e88SKeith Busch if (ctrl->ctrl.state == NVME_CTRL_RESETTING) 217192b98e88SKeith Busch return BLK_EH_RESET_TIMER; 217292b98e88SKeith Busch 217339d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, 21743f2304f8SSagi Grimberg "queue %d: timeout request %#x type %d\n", 217539d57757SSagi Grimberg nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type); 21763f2304f8SSagi Grimberg 21773f2304f8SSagi Grimberg if (ctrl->ctrl.state != NVME_CTRL_LIVE) { 217839d57757SSagi Grimberg /* 217939d57757SSagi Grimberg * Teardown immediately if controller times out while starting 218039d57757SSagi Grimberg * or we are already started error recovery. all outstanding 218139d57757SSagi Grimberg * requests are completed on shutdown, so we return BLK_EH_DONE. 218239d57757SSagi Grimberg */ 218339d57757SSagi Grimberg flush_work(&ctrl->err_work); 218439d57757SSagi Grimberg nvme_tcp_teardown_io_queues(&ctrl->ctrl, false); 218539d57757SSagi Grimberg nvme_tcp_teardown_admin_queue(&ctrl->ctrl, false); 21863f2304f8SSagi Grimberg return BLK_EH_DONE; 21873f2304f8SSagi Grimberg } 21883f2304f8SSagi Grimberg 218939d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, "starting error recovery\n"); 21903f2304f8SSagi Grimberg nvme_tcp_error_recovery(&ctrl->ctrl); 21913f2304f8SSagi Grimberg 21923f2304f8SSagi Grimberg return BLK_EH_RESET_TIMER; 21933f2304f8SSagi Grimberg } 21943f2304f8SSagi Grimberg 21953f2304f8SSagi Grimberg static blk_status_t nvme_tcp_map_data(struct nvme_tcp_queue *queue, 21963f2304f8SSagi Grimberg struct request *rq) 21973f2304f8SSagi Grimberg { 21983f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 21993f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22003f2304f8SSagi Grimberg struct nvme_command *c = &pdu->cmd; 22013f2304f8SSagi Grimberg 22023f2304f8SSagi Grimberg c->common.flags |= NVME_CMD_SGL_METABUF; 22033f2304f8SSagi Grimberg 220425e5cb78SSagi Grimberg if (!blk_rq_nr_phys_segments(rq)) 220525e5cb78SSagi Grimberg nvme_tcp_set_sg_null(c); 220625e5cb78SSagi Grimberg else if (rq_data_dir(rq) == WRITE && 22073f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 22083f2304f8SSagi Grimberg nvme_tcp_set_sg_inline(queue, c, req->data_len); 22093f2304f8SSagi Grimberg else 22103f2304f8SSagi Grimberg nvme_tcp_set_sg_host_data(c, req->data_len); 22113f2304f8SSagi Grimberg 22123f2304f8SSagi Grimberg return 0; 22133f2304f8SSagi Grimberg } 22143f2304f8SSagi Grimberg 22153f2304f8SSagi Grimberg static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns, 22163f2304f8SSagi Grimberg struct request *rq) 22173f2304f8SSagi Grimberg { 22183f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22193f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22203f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 22213f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue), ddgst = 0; 22223f2304f8SSagi Grimberg blk_status_t ret; 22233f2304f8SSagi Grimberg 22243f2304f8SSagi Grimberg ret = nvme_setup_cmd(ns, rq, &pdu->cmd); 22253f2304f8SSagi Grimberg if (ret) 22263f2304f8SSagi Grimberg return ret; 22273f2304f8SSagi Grimberg 22283f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_CMD_PDU; 22293f2304f8SSagi Grimberg req->offset = 0; 22303f2304f8SSagi Grimberg req->data_sent = 0; 22313f2304f8SSagi Grimberg req->pdu_len = 0; 22323f2304f8SSagi Grimberg req->pdu_sent = 0; 223325e5cb78SSagi Grimberg req->data_len = blk_rq_nr_phys_segments(rq) ? 223425e5cb78SSagi Grimberg blk_rq_payload_bytes(rq) : 0; 22353f2304f8SSagi Grimberg req->curr_bio = rq->bio; 22363f2304f8SSagi Grimberg 22373f2304f8SSagi Grimberg if (rq_data_dir(rq) == WRITE && 22383f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 22393f2304f8SSagi Grimberg req->pdu_len = req->data_len; 22403f2304f8SSagi Grimberg else if (req->curr_bio) 22413f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 22423f2304f8SSagi Grimberg 22433f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 22443f2304f8SSagi Grimberg pdu->hdr.flags = 0; 22453f2304f8SSagi Grimberg if (queue->hdr_digest) 22463f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 22473f2304f8SSagi Grimberg if (queue->data_digest && req->pdu_len) { 22483f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_DDGST; 22493f2304f8SSagi Grimberg ddgst = nvme_tcp_ddgst_len(queue); 22503f2304f8SSagi Grimberg } 22513f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 22523f2304f8SSagi Grimberg pdu->hdr.pdo = req->pdu_len ? pdu->hdr.hlen + hdgst : 0; 22533f2304f8SSagi Grimberg pdu->hdr.plen = 22543f2304f8SSagi Grimberg cpu_to_le32(pdu->hdr.hlen + hdgst + req->pdu_len + ddgst); 22553f2304f8SSagi Grimberg 22563f2304f8SSagi Grimberg ret = nvme_tcp_map_data(queue, rq); 22573f2304f8SSagi Grimberg if (unlikely(ret)) { 225828a4cac4SMax Gurtovoy nvme_cleanup_cmd(rq); 22593f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 22603f2304f8SSagi Grimberg "Failed to map data (%d)\n", ret); 22613f2304f8SSagi Grimberg return ret; 22623f2304f8SSagi Grimberg } 22633f2304f8SSagi Grimberg 22643f2304f8SSagi Grimberg return 0; 22653f2304f8SSagi Grimberg } 22663f2304f8SSagi Grimberg 226786f0348aSSagi Grimberg static void nvme_tcp_commit_rqs(struct blk_mq_hw_ctx *hctx) 226886f0348aSSagi Grimberg { 226986f0348aSSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 227086f0348aSSagi Grimberg 227186f0348aSSagi Grimberg if (!llist_empty(&queue->req_list)) 227286f0348aSSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 227386f0348aSSagi Grimberg } 227486f0348aSSagi Grimberg 22753f2304f8SSagi Grimberg static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx, 22763f2304f8SSagi Grimberg const struct blk_mq_queue_data *bd) 22773f2304f8SSagi Grimberg { 22783f2304f8SSagi Grimberg struct nvme_ns *ns = hctx->queue->queuedata; 22793f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 22803f2304f8SSagi Grimberg struct request *rq = bd->rq; 22813f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22823f2304f8SSagi Grimberg bool queue_ready = test_bit(NVME_TCP_Q_LIVE, &queue->flags); 22833f2304f8SSagi Grimberg blk_status_t ret; 22843f2304f8SSagi Grimberg 22853f2304f8SSagi Grimberg if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) 22863f2304f8SSagi Grimberg return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq); 22873f2304f8SSagi Grimberg 22883f2304f8SSagi Grimberg ret = nvme_tcp_setup_cmd_pdu(ns, rq); 22893f2304f8SSagi Grimberg if (unlikely(ret)) 22903f2304f8SSagi Grimberg return ret; 22913f2304f8SSagi Grimberg 22923f2304f8SSagi Grimberg blk_mq_start_request(rq); 22933f2304f8SSagi Grimberg 229486f0348aSSagi Grimberg nvme_tcp_queue_request(req, true, bd->last); 22953f2304f8SSagi Grimberg 22963f2304f8SSagi Grimberg return BLK_STS_OK; 22973f2304f8SSagi Grimberg } 22983f2304f8SSagi Grimberg 2299873946f4SSagi Grimberg static int nvme_tcp_map_queues(struct blk_mq_tag_set *set) 2300873946f4SSagi Grimberg { 2301873946f4SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 230264861993SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 2303873946f4SSagi Grimberg 230464861993SSagi Grimberg if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) { 2305873946f4SSagi Grimberg /* separate read/write queues */ 2306873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 230764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 230864861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 230964861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 231064861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 2311873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 231264861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2313873946f4SSagi Grimberg } else { 231464861993SSagi Grimberg /* shared read/write queues */ 2315873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 231664861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 231764861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 231864861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 231964861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2320873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 0; 2321873946f4SSagi Grimberg } 2322873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); 2323873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); 232464861993SSagi Grimberg 23251a9460ceSSagi Grimberg if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) { 23261a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 23271a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].nr_queues = 23281a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 23291a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].queue_offset = 23301a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] + 23311a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 23321a9460ceSSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); 23331a9460ceSSagi Grimberg } 23341a9460ceSSagi Grimberg 233564861993SSagi Grimberg dev_info(ctrl->ctrl.device, 23361a9460ceSSagi Grimberg "mapped %d/%d/%d default/read/poll queues.\n", 233764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT], 23381a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ], 23391a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]); 234064861993SSagi Grimberg 2341873946f4SSagi Grimberg return 0; 2342873946f4SSagi Grimberg } 2343873946f4SSagi Grimberg 23441a9460ceSSagi Grimberg static int nvme_tcp_poll(struct blk_mq_hw_ctx *hctx) 23451a9460ceSSagi Grimberg { 23461a9460ceSSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 23471a9460ceSSagi Grimberg struct sock *sk = queue->sock->sk; 23481a9460ceSSagi Grimberg 2349f86e5bf8SSagi Grimberg if (!test_bit(NVME_TCP_Q_LIVE, &queue->flags)) 2350f86e5bf8SSagi Grimberg return 0; 2351f86e5bf8SSagi Grimberg 235272e5d757SSagi Grimberg set_bit(NVME_TCP_Q_POLLING, &queue->flags); 23533f926af3SEric Dumazet if (sk_can_busy_loop(sk) && skb_queue_empty_lockless(&sk->sk_receive_queue)) 23541a9460ceSSagi Grimberg sk_busy_loop(sk, true); 23551a9460ceSSagi Grimberg nvme_tcp_try_recv(queue); 235672e5d757SSagi Grimberg clear_bit(NVME_TCP_Q_POLLING, &queue->flags); 23571a9460ceSSagi Grimberg return queue->nr_cqe; 23581a9460ceSSagi Grimberg } 23591a9460ceSSagi Grimberg 23606acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_mq_ops = { 23613f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 236286f0348aSSagi Grimberg .commit_rqs = nvme_tcp_commit_rqs, 23633f2304f8SSagi Grimberg .complete = nvme_complete_rq, 23643f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 23653f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 23663f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_hctx, 23673f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 2368873946f4SSagi Grimberg .map_queues = nvme_tcp_map_queues, 23691a9460ceSSagi Grimberg .poll = nvme_tcp_poll, 23703f2304f8SSagi Grimberg }; 23713f2304f8SSagi Grimberg 23726acbd961SRikard Falkeborn static const struct blk_mq_ops nvme_tcp_admin_mq_ops = { 23733f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 23743f2304f8SSagi Grimberg .complete = nvme_complete_rq, 23753f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 23763f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 23773f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_admin_hctx, 23783f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 23793f2304f8SSagi Grimberg }; 23803f2304f8SSagi Grimberg 23813f2304f8SSagi Grimberg static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = { 23823f2304f8SSagi Grimberg .name = "tcp", 23833f2304f8SSagi Grimberg .module = THIS_MODULE, 23843f2304f8SSagi Grimberg .flags = NVME_F_FABRICS, 23853f2304f8SSagi Grimberg .reg_read32 = nvmf_reg_read32, 23863f2304f8SSagi Grimberg .reg_read64 = nvmf_reg_read64, 23873f2304f8SSagi Grimberg .reg_write32 = nvmf_reg_write32, 23883f2304f8SSagi Grimberg .free_ctrl = nvme_tcp_free_ctrl, 23893f2304f8SSagi Grimberg .submit_async_event = nvme_tcp_submit_async_event, 23903f2304f8SSagi Grimberg .delete_ctrl = nvme_tcp_delete_ctrl, 23913f2304f8SSagi Grimberg .get_address = nvmf_get_address, 23923f2304f8SSagi Grimberg }; 23933f2304f8SSagi Grimberg 23943f2304f8SSagi Grimberg static bool 23953f2304f8SSagi Grimberg nvme_tcp_existing_controller(struct nvmf_ctrl_options *opts) 23963f2304f8SSagi Grimberg { 23973f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 23983f2304f8SSagi Grimberg bool found = false; 23993f2304f8SSagi Grimberg 24003f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 24013f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) { 24023f2304f8SSagi Grimberg found = nvmf_ip_options_match(&ctrl->ctrl, opts); 24033f2304f8SSagi Grimberg if (found) 24043f2304f8SSagi Grimberg break; 24053f2304f8SSagi Grimberg } 24063f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 24073f2304f8SSagi Grimberg 24083f2304f8SSagi Grimberg return found; 24093f2304f8SSagi Grimberg } 24103f2304f8SSagi Grimberg 24113f2304f8SSagi Grimberg static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, 24123f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts) 24133f2304f8SSagi Grimberg { 24143f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 24153f2304f8SSagi Grimberg int ret; 24163f2304f8SSagi Grimberg 24173f2304f8SSagi Grimberg ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 24183f2304f8SSagi Grimberg if (!ctrl) 24193f2304f8SSagi Grimberg return ERR_PTR(-ENOMEM); 24203f2304f8SSagi Grimberg 24213f2304f8SSagi Grimberg INIT_LIST_HEAD(&ctrl->list); 24223f2304f8SSagi Grimberg ctrl->ctrl.opts = opts; 24231a9460ceSSagi Grimberg ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 24241a9460ceSSagi Grimberg opts->nr_poll_queues + 1; 24253f2304f8SSagi Grimberg ctrl->ctrl.sqsize = opts->queue_size - 1; 24263f2304f8SSagi Grimberg ctrl->ctrl.kato = opts->kato; 24273f2304f8SSagi Grimberg 24283f2304f8SSagi Grimberg INIT_DELAYED_WORK(&ctrl->connect_work, 24293f2304f8SSagi Grimberg nvme_tcp_reconnect_ctrl_work); 24303f2304f8SSagi Grimberg INIT_WORK(&ctrl->err_work, nvme_tcp_error_recovery_work); 24313f2304f8SSagi Grimberg INIT_WORK(&ctrl->ctrl.reset_work, nvme_reset_ctrl_work); 2432d4d61470SSagi Grimberg mutex_init(&ctrl->teardown_lock); 24333f2304f8SSagi Grimberg 24343f2304f8SSagi Grimberg if (!(opts->mask & NVMF_OPT_TRSVCID)) { 24353f2304f8SSagi Grimberg opts->trsvcid = 24363f2304f8SSagi Grimberg kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); 24373f2304f8SSagi Grimberg if (!opts->trsvcid) { 24383f2304f8SSagi Grimberg ret = -ENOMEM; 24393f2304f8SSagi Grimberg goto out_free_ctrl; 24403f2304f8SSagi Grimberg } 24413f2304f8SSagi Grimberg opts->mask |= NVMF_OPT_TRSVCID; 24423f2304f8SSagi Grimberg } 24433f2304f8SSagi Grimberg 24443f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24453f2304f8SSagi Grimberg opts->traddr, opts->trsvcid, &ctrl->addr); 24463f2304f8SSagi Grimberg if (ret) { 24473f2304f8SSagi Grimberg pr_err("malformed address passed: %s:%s\n", 24483f2304f8SSagi Grimberg opts->traddr, opts->trsvcid); 24493f2304f8SSagi Grimberg goto out_free_ctrl; 24503f2304f8SSagi Grimberg } 24513f2304f8SSagi Grimberg 24523f2304f8SSagi Grimberg if (opts->mask & NVMF_OPT_HOST_TRADDR) { 24533f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24543f2304f8SSagi Grimberg opts->host_traddr, NULL, &ctrl->src_addr); 24553f2304f8SSagi Grimberg if (ret) { 24563f2304f8SSagi Grimberg pr_err("malformed src address passed: %s\n", 24573f2304f8SSagi Grimberg opts->host_traddr); 24583f2304f8SSagi Grimberg goto out_free_ctrl; 24593f2304f8SSagi Grimberg } 24603f2304f8SSagi Grimberg } 24613f2304f8SSagi Grimberg 24623f2304f8SSagi Grimberg if (!opts->duplicate_connect && nvme_tcp_existing_controller(opts)) { 24633f2304f8SSagi Grimberg ret = -EALREADY; 24643f2304f8SSagi Grimberg goto out_free_ctrl; 24653f2304f8SSagi Grimberg } 24663f2304f8SSagi Grimberg 2467873946f4SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues), 24683f2304f8SSagi Grimberg GFP_KERNEL); 24693f2304f8SSagi Grimberg if (!ctrl->queues) { 24703f2304f8SSagi Grimberg ret = -ENOMEM; 24713f2304f8SSagi Grimberg goto out_free_ctrl; 24723f2304f8SSagi Grimberg } 24733f2304f8SSagi Grimberg 24743f2304f8SSagi Grimberg ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_tcp_ctrl_ops, 0); 24753f2304f8SSagi Grimberg if (ret) 24763f2304f8SSagi Grimberg goto out_kfree_queues; 24773f2304f8SSagi Grimberg 24783f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { 24793f2304f8SSagi Grimberg WARN_ON_ONCE(1); 24803f2304f8SSagi Grimberg ret = -EINTR; 24813f2304f8SSagi Grimberg goto out_uninit_ctrl; 24823f2304f8SSagi Grimberg } 24833f2304f8SSagi Grimberg 24843f2304f8SSagi Grimberg ret = nvme_tcp_setup_ctrl(&ctrl->ctrl, true); 24853f2304f8SSagi Grimberg if (ret) 24863f2304f8SSagi Grimberg goto out_uninit_ctrl; 24873f2304f8SSagi Grimberg 24883f2304f8SSagi Grimberg dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n", 24893f2304f8SSagi Grimberg ctrl->ctrl.opts->subsysnqn, &ctrl->addr); 24903f2304f8SSagi Grimberg 24913f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 24923f2304f8SSagi Grimberg list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list); 24933f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 24943f2304f8SSagi Grimberg 24953f2304f8SSagi Grimberg return &ctrl->ctrl; 24963f2304f8SSagi Grimberg 24973f2304f8SSagi Grimberg out_uninit_ctrl: 24983f2304f8SSagi Grimberg nvme_uninit_ctrl(&ctrl->ctrl); 24993f2304f8SSagi Grimberg nvme_put_ctrl(&ctrl->ctrl); 25003f2304f8SSagi Grimberg if (ret > 0) 25013f2304f8SSagi Grimberg ret = -EIO; 25023f2304f8SSagi Grimberg return ERR_PTR(ret); 25033f2304f8SSagi Grimberg out_kfree_queues: 25043f2304f8SSagi Grimberg kfree(ctrl->queues); 25053f2304f8SSagi Grimberg out_free_ctrl: 25063f2304f8SSagi Grimberg kfree(ctrl); 25073f2304f8SSagi Grimberg return ERR_PTR(ret); 25083f2304f8SSagi Grimberg } 25093f2304f8SSagi Grimberg 25103f2304f8SSagi Grimberg static struct nvmf_transport_ops nvme_tcp_transport = { 25113f2304f8SSagi Grimberg .name = "tcp", 25123f2304f8SSagi Grimberg .module = THIS_MODULE, 25133f2304f8SSagi Grimberg .required_opts = NVMF_OPT_TRADDR, 25143f2304f8SSagi Grimberg .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY | 25153f2304f8SSagi Grimberg NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | 2516873946f4SSagi Grimberg NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | 2517bb13985dSIsrael Rukshin NVMF_OPT_NR_WRITE_QUEUES | NVMF_OPT_NR_POLL_QUEUES | 2518bb13985dSIsrael Rukshin NVMF_OPT_TOS, 25193f2304f8SSagi Grimberg .create_ctrl = nvme_tcp_create_ctrl, 25203f2304f8SSagi Grimberg }; 25213f2304f8SSagi Grimberg 25223f2304f8SSagi Grimberg static int __init nvme_tcp_init_module(void) 25233f2304f8SSagi Grimberg { 25243f2304f8SSagi Grimberg nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", 25253f2304f8SSagi Grimberg WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); 25263f2304f8SSagi Grimberg if (!nvme_tcp_wq) 25273f2304f8SSagi Grimberg return -ENOMEM; 25283f2304f8SSagi Grimberg 25293f2304f8SSagi Grimberg nvmf_register_transport(&nvme_tcp_transport); 25303f2304f8SSagi Grimberg return 0; 25313f2304f8SSagi Grimberg } 25323f2304f8SSagi Grimberg 25333f2304f8SSagi Grimberg static void __exit nvme_tcp_cleanup_module(void) 25343f2304f8SSagi Grimberg { 25353f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 25363f2304f8SSagi Grimberg 25373f2304f8SSagi Grimberg nvmf_unregister_transport(&nvme_tcp_transport); 25383f2304f8SSagi Grimberg 25393f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 25403f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) 25413f2304f8SSagi Grimberg nvme_delete_ctrl(&ctrl->ctrl); 25423f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 25433f2304f8SSagi Grimberg flush_workqueue(nvme_delete_wq); 25443f2304f8SSagi Grimberg 25453f2304f8SSagi Grimberg destroy_workqueue(nvme_tcp_wq); 25463f2304f8SSagi Grimberg } 25473f2304f8SSagi Grimberg 25483f2304f8SSagi Grimberg module_init(nvme_tcp_init_module); 25493f2304f8SSagi Grimberg module_exit(nvme_tcp_cleanup_module); 25503f2304f8SSagi Grimberg 25513f2304f8SSagi Grimberg MODULE_LICENSE("GPL v2"); 2552