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; 49a7273d40SChristoph Hellwig __le32 ddgst; 503f2304f8SSagi Grimberg 513f2304f8SSagi Grimberg struct bio *curr_bio; 523f2304f8SSagi Grimberg struct iov_iter iter; 533f2304f8SSagi Grimberg 543f2304f8SSagi Grimberg /* send state */ 553f2304f8SSagi Grimberg size_t offset; 563f2304f8SSagi Grimberg size_t data_sent; 573f2304f8SSagi Grimberg enum nvme_tcp_send_state state; 583f2304f8SSagi Grimberg }; 593f2304f8SSagi Grimberg 603f2304f8SSagi Grimberg enum nvme_tcp_queue_flags { 613f2304f8SSagi Grimberg NVME_TCP_Q_ALLOCATED = 0, 623f2304f8SSagi Grimberg NVME_TCP_Q_LIVE = 1, 6372e5d757SSagi Grimberg NVME_TCP_Q_POLLING = 2, 643f2304f8SSagi Grimberg }; 653f2304f8SSagi Grimberg 663f2304f8SSagi Grimberg enum nvme_tcp_recv_state { 673f2304f8SSagi Grimberg NVME_TCP_RECV_PDU = 0, 683f2304f8SSagi Grimberg NVME_TCP_RECV_DATA, 693f2304f8SSagi Grimberg NVME_TCP_RECV_DDGST, 703f2304f8SSagi Grimberg }; 713f2304f8SSagi Grimberg 723f2304f8SSagi Grimberg struct nvme_tcp_ctrl; 733f2304f8SSagi Grimberg struct nvme_tcp_queue { 743f2304f8SSagi Grimberg struct socket *sock; 753f2304f8SSagi Grimberg struct work_struct io_work; 763f2304f8SSagi Grimberg int io_cpu; 773f2304f8SSagi Grimberg 783f2304f8SSagi Grimberg spinlock_t lock; 79db5ad6b7SSagi Grimberg struct mutex send_mutex; 803f2304f8SSagi Grimberg struct list_head send_list; 813f2304f8SSagi Grimberg 823f2304f8SSagi Grimberg /* recv state */ 833f2304f8SSagi Grimberg void *pdu; 843f2304f8SSagi Grimberg int pdu_remaining; 853f2304f8SSagi Grimberg int pdu_offset; 863f2304f8SSagi Grimberg size_t data_remaining; 873f2304f8SSagi Grimberg size_t ddgst_remaining; 881a9460ceSSagi Grimberg unsigned int nr_cqe; 893f2304f8SSagi Grimberg 903f2304f8SSagi Grimberg /* send state */ 913f2304f8SSagi Grimberg struct nvme_tcp_request *request; 923f2304f8SSagi Grimberg 933f2304f8SSagi Grimberg int queue_size; 943f2304f8SSagi Grimberg size_t cmnd_capsule_len; 953f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 963f2304f8SSagi Grimberg unsigned long flags; 973f2304f8SSagi Grimberg bool rd_enabled; 983f2304f8SSagi Grimberg 993f2304f8SSagi Grimberg bool hdr_digest; 1003f2304f8SSagi Grimberg bool data_digest; 1013f2304f8SSagi Grimberg struct ahash_request *rcv_hash; 1023f2304f8SSagi Grimberg struct ahash_request *snd_hash; 1033f2304f8SSagi Grimberg __le32 exp_ddgst; 1043f2304f8SSagi Grimberg __le32 recv_ddgst; 1053f2304f8SSagi Grimberg 1063f2304f8SSagi Grimberg struct page_frag_cache pf_cache; 1073f2304f8SSagi Grimberg 1083f2304f8SSagi Grimberg void (*state_change)(struct sock *); 1093f2304f8SSagi Grimberg void (*data_ready)(struct sock *); 1103f2304f8SSagi Grimberg void (*write_space)(struct sock *); 1113f2304f8SSagi Grimberg }; 1123f2304f8SSagi Grimberg 1133f2304f8SSagi Grimberg struct nvme_tcp_ctrl { 1143f2304f8SSagi Grimberg /* read only in the hot path */ 1153f2304f8SSagi Grimberg struct nvme_tcp_queue *queues; 1163f2304f8SSagi Grimberg struct blk_mq_tag_set tag_set; 1173f2304f8SSagi Grimberg 1183f2304f8SSagi Grimberg /* other member variables */ 1193f2304f8SSagi Grimberg struct list_head list; 1203f2304f8SSagi Grimberg struct blk_mq_tag_set admin_tag_set; 1213f2304f8SSagi Grimberg struct sockaddr_storage addr; 1223f2304f8SSagi Grimberg struct sockaddr_storage src_addr; 1233f2304f8SSagi Grimberg struct nvme_ctrl ctrl; 1243f2304f8SSagi Grimberg 1253f2304f8SSagi Grimberg struct work_struct err_work; 1263f2304f8SSagi Grimberg struct delayed_work connect_work; 1273f2304f8SSagi Grimberg struct nvme_tcp_request async_req; 12864861993SSagi Grimberg u32 io_queues[HCTX_MAX_TYPES]; 1293f2304f8SSagi Grimberg }; 1303f2304f8SSagi Grimberg 1313f2304f8SSagi Grimberg static LIST_HEAD(nvme_tcp_ctrl_list); 1323f2304f8SSagi Grimberg static DEFINE_MUTEX(nvme_tcp_ctrl_mutex); 1333f2304f8SSagi Grimberg static struct workqueue_struct *nvme_tcp_wq; 1343f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_mq_ops; 1353f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_admin_mq_ops; 136db5ad6b7SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue); 1373f2304f8SSagi Grimberg 1383f2304f8SSagi Grimberg static inline struct nvme_tcp_ctrl *to_tcp_ctrl(struct nvme_ctrl *ctrl) 1393f2304f8SSagi Grimberg { 1403f2304f8SSagi Grimberg return container_of(ctrl, struct nvme_tcp_ctrl, ctrl); 1413f2304f8SSagi Grimberg } 1423f2304f8SSagi Grimberg 1433f2304f8SSagi Grimberg static inline int nvme_tcp_queue_id(struct nvme_tcp_queue *queue) 1443f2304f8SSagi Grimberg { 1453f2304f8SSagi Grimberg return queue - queue->ctrl->queues; 1463f2304f8SSagi Grimberg } 1473f2304f8SSagi Grimberg 1483f2304f8SSagi Grimberg static inline struct blk_mq_tags *nvme_tcp_tagset(struct nvme_tcp_queue *queue) 1493f2304f8SSagi Grimberg { 1503f2304f8SSagi Grimberg u32 queue_idx = nvme_tcp_queue_id(queue); 1513f2304f8SSagi Grimberg 1523f2304f8SSagi Grimberg if (queue_idx == 0) 1533f2304f8SSagi Grimberg return queue->ctrl->admin_tag_set.tags[queue_idx]; 1543f2304f8SSagi Grimberg return queue->ctrl->tag_set.tags[queue_idx - 1]; 1553f2304f8SSagi Grimberg } 1563f2304f8SSagi Grimberg 1573f2304f8SSagi Grimberg static inline u8 nvme_tcp_hdgst_len(struct nvme_tcp_queue *queue) 1583f2304f8SSagi Grimberg { 1593f2304f8SSagi Grimberg return queue->hdr_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1603f2304f8SSagi Grimberg } 1613f2304f8SSagi Grimberg 1623f2304f8SSagi Grimberg static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue) 1633f2304f8SSagi Grimberg { 1643f2304f8SSagi Grimberg return queue->data_digest ? NVME_TCP_DIGEST_LENGTH : 0; 1653f2304f8SSagi Grimberg } 1663f2304f8SSagi Grimberg 1673f2304f8SSagi Grimberg static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_queue *queue) 1683f2304f8SSagi Grimberg { 1693f2304f8SSagi Grimberg return queue->cmnd_capsule_len - sizeof(struct nvme_command); 1703f2304f8SSagi Grimberg } 1713f2304f8SSagi Grimberg 1723f2304f8SSagi Grimberg static inline bool nvme_tcp_async_req(struct nvme_tcp_request *req) 1733f2304f8SSagi Grimberg { 1743f2304f8SSagi Grimberg return req == &req->queue->ctrl->async_req; 1753f2304f8SSagi Grimberg } 1763f2304f8SSagi Grimberg 1773f2304f8SSagi Grimberg static inline bool nvme_tcp_has_inline_data(struct nvme_tcp_request *req) 1783f2304f8SSagi Grimberg { 1793f2304f8SSagi Grimberg struct request *rq; 1803f2304f8SSagi Grimberg 1813f2304f8SSagi Grimberg if (unlikely(nvme_tcp_async_req(req))) 1823f2304f8SSagi Grimberg return false; /* async events don't have a request */ 1833f2304f8SSagi Grimberg 1843f2304f8SSagi Grimberg rq = blk_mq_rq_from_pdu(req); 1853f2304f8SSagi Grimberg 18625e5cb78SSagi Grimberg return rq_data_dir(rq) == WRITE && req->data_len && 18725e5cb78SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(req->queue); 1883f2304f8SSagi Grimberg } 1893f2304f8SSagi Grimberg 1903f2304f8SSagi Grimberg static inline struct page *nvme_tcp_req_cur_page(struct nvme_tcp_request *req) 1913f2304f8SSagi Grimberg { 1923f2304f8SSagi Grimberg return req->iter.bvec->bv_page; 1933f2304f8SSagi Grimberg } 1943f2304f8SSagi Grimberg 1953f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_offset(struct nvme_tcp_request *req) 1963f2304f8SSagi Grimberg { 1973f2304f8SSagi Grimberg return req->iter.bvec->bv_offset + req->iter.iov_offset; 1983f2304f8SSagi Grimberg } 1993f2304f8SSagi Grimberg 2003f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_cur_length(struct nvme_tcp_request *req) 2013f2304f8SSagi Grimberg { 2023f2304f8SSagi Grimberg return min_t(size_t, req->iter.bvec->bv_len - req->iter.iov_offset, 2033f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent); 2043f2304f8SSagi Grimberg } 2053f2304f8SSagi Grimberg 2063f2304f8SSagi Grimberg static inline size_t nvme_tcp_req_offset(struct nvme_tcp_request *req) 2073f2304f8SSagi Grimberg { 2083f2304f8SSagi Grimberg return req->iter.iov_offset; 2093f2304f8SSagi Grimberg } 2103f2304f8SSagi Grimberg 2113f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_data_left(struct nvme_tcp_request *req) 2123f2304f8SSagi Grimberg { 2133f2304f8SSagi Grimberg return rq_data_dir(blk_mq_rq_from_pdu(req)) == WRITE ? 2143f2304f8SSagi Grimberg req->pdu_len - req->pdu_sent : 0; 2153f2304f8SSagi Grimberg } 2163f2304f8SSagi Grimberg 2173f2304f8SSagi Grimberg static inline size_t nvme_tcp_pdu_last_send(struct nvme_tcp_request *req, 2183f2304f8SSagi Grimberg int len) 2193f2304f8SSagi Grimberg { 2203f2304f8SSagi Grimberg return nvme_tcp_pdu_data_left(req) <= len; 2213f2304f8SSagi Grimberg } 2223f2304f8SSagi Grimberg 2233f2304f8SSagi Grimberg static void nvme_tcp_init_iter(struct nvme_tcp_request *req, 2243f2304f8SSagi Grimberg unsigned int dir) 2253f2304f8SSagi Grimberg { 2263f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 2273f2304f8SSagi Grimberg struct bio_vec *vec; 2283f2304f8SSagi Grimberg unsigned int size; 2293f2304f8SSagi Grimberg int nsegs; 2303f2304f8SSagi Grimberg size_t offset; 2313f2304f8SSagi Grimberg 2323f2304f8SSagi Grimberg if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) { 2333f2304f8SSagi Grimberg vec = &rq->special_vec; 2343f2304f8SSagi Grimberg nsegs = 1; 2353f2304f8SSagi Grimberg size = blk_rq_payload_bytes(rq); 2363f2304f8SSagi Grimberg offset = 0; 2373f2304f8SSagi Grimberg } else { 2383f2304f8SSagi Grimberg struct bio *bio = req->curr_bio; 2393f2304f8SSagi Grimberg 2403f2304f8SSagi Grimberg vec = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); 2413f2304f8SSagi Grimberg nsegs = bio_segments(bio); 2423f2304f8SSagi Grimberg size = bio->bi_iter.bi_size; 2433f2304f8SSagi Grimberg offset = bio->bi_iter.bi_bvec_done; 2443f2304f8SSagi Grimberg } 2453f2304f8SSagi Grimberg 2463f2304f8SSagi Grimberg iov_iter_bvec(&req->iter, dir, vec, nsegs, size); 2473f2304f8SSagi Grimberg req->iter.iov_offset = offset; 2483f2304f8SSagi Grimberg } 2493f2304f8SSagi Grimberg 2503f2304f8SSagi Grimberg static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req, 2513f2304f8SSagi Grimberg int len) 2523f2304f8SSagi Grimberg { 2533f2304f8SSagi Grimberg req->data_sent += len; 2543f2304f8SSagi Grimberg req->pdu_sent += len; 2553f2304f8SSagi Grimberg iov_iter_advance(&req->iter, len); 2563f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter) && 2573f2304f8SSagi Grimberg req->data_sent < req->data_len) { 2583f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 2593f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 2603f2304f8SSagi Grimberg } 2613f2304f8SSagi Grimberg } 2623f2304f8SSagi Grimberg 263db5ad6b7SSagi Grimberg static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req, 264db5ad6b7SSagi Grimberg bool sync) 2653f2304f8SSagi Grimberg { 2663f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 267db5ad6b7SSagi Grimberg bool empty; 2683f2304f8SSagi Grimberg 2693f2304f8SSagi Grimberg spin_lock(&queue->lock); 270db5ad6b7SSagi Grimberg empty = list_empty(&queue->send_list) && !queue->request; 2713f2304f8SSagi Grimberg list_add_tail(&req->entry, &queue->send_list); 2723f2304f8SSagi Grimberg spin_unlock(&queue->lock); 2733f2304f8SSagi Grimberg 274db5ad6b7SSagi Grimberg /* 275db5ad6b7SSagi Grimberg * if we're the first on the send_list and we can try to send 276db5ad6b7SSagi Grimberg * directly, otherwise queue io_work. Also, only do that if we 277db5ad6b7SSagi Grimberg * are on the same cpu, so we don't introduce contention. 278db5ad6b7SSagi Grimberg */ 279db5ad6b7SSagi Grimberg if (queue->io_cpu == smp_processor_id() && 280db5ad6b7SSagi Grimberg sync && empty && mutex_trylock(&queue->send_mutex)) { 281db5ad6b7SSagi Grimberg nvme_tcp_try_send(queue); 282db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 283db5ad6b7SSagi Grimberg } else { 2843f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 2853f2304f8SSagi Grimberg } 286db5ad6b7SSagi Grimberg } 2873f2304f8SSagi Grimberg 2883f2304f8SSagi Grimberg static inline struct nvme_tcp_request * 2893f2304f8SSagi Grimberg nvme_tcp_fetch_request(struct nvme_tcp_queue *queue) 2903f2304f8SSagi Grimberg { 2913f2304f8SSagi Grimberg struct nvme_tcp_request *req; 2923f2304f8SSagi Grimberg 2933f2304f8SSagi Grimberg spin_lock(&queue->lock); 2943f2304f8SSagi Grimberg req = list_first_entry_or_null(&queue->send_list, 2953f2304f8SSagi Grimberg struct nvme_tcp_request, entry); 2963f2304f8SSagi Grimberg if (req) 2973f2304f8SSagi Grimberg list_del(&req->entry); 2983f2304f8SSagi Grimberg spin_unlock(&queue->lock); 2993f2304f8SSagi Grimberg 3003f2304f8SSagi Grimberg return req; 3013f2304f8SSagi Grimberg } 3023f2304f8SSagi Grimberg 303a7273d40SChristoph Hellwig static inline void nvme_tcp_ddgst_final(struct ahash_request *hash, 304a7273d40SChristoph Hellwig __le32 *dgst) 3053f2304f8SSagi Grimberg { 3063f2304f8SSagi Grimberg ahash_request_set_crypt(hash, NULL, (u8 *)dgst, 0); 3073f2304f8SSagi Grimberg crypto_ahash_final(hash); 3083f2304f8SSagi Grimberg } 3093f2304f8SSagi Grimberg 3103f2304f8SSagi Grimberg static inline void nvme_tcp_ddgst_update(struct ahash_request *hash, 3113f2304f8SSagi Grimberg struct page *page, off_t off, size_t len) 3123f2304f8SSagi Grimberg { 3133f2304f8SSagi Grimberg struct scatterlist sg; 3143f2304f8SSagi Grimberg 3153f2304f8SSagi Grimberg sg_init_marker(&sg, 1); 3163f2304f8SSagi Grimberg sg_set_page(&sg, page, len, off); 3173f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, NULL, len); 3183f2304f8SSagi Grimberg crypto_ahash_update(hash); 3193f2304f8SSagi Grimberg } 3203f2304f8SSagi Grimberg 3213f2304f8SSagi Grimberg static inline void nvme_tcp_hdgst(struct ahash_request *hash, 3223f2304f8SSagi Grimberg void *pdu, size_t len) 3233f2304f8SSagi Grimberg { 3243f2304f8SSagi Grimberg struct scatterlist sg; 3253f2304f8SSagi Grimberg 3263f2304f8SSagi Grimberg sg_init_one(&sg, pdu, len); 3273f2304f8SSagi Grimberg ahash_request_set_crypt(hash, &sg, pdu + len, len); 3283f2304f8SSagi Grimberg crypto_ahash_digest(hash); 3293f2304f8SSagi Grimberg } 3303f2304f8SSagi Grimberg 3313f2304f8SSagi Grimberg static int nvme_tcp_verify_hdgst(struct nvme_tcp_queue *queue, 3323f2304f8SSagi Grimberg void *pdu, size_t pdu_len) 3333f2304f8SSagi Grimberg { 3343f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3353f2304f8SSagi Grimberg __le32 recv_digest; 3363f2304f8SSagi Grimberg __le32 exp_digest; 3373f2304f8SSagi Grimberg 3383f2304f8SSagi Grimberg if (unlikely(!(hdr->flags & NVME_TCP_F_HDGST))) { 3393f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3403f2304f8SSagi Grimberg "queue %d: header digest flag is cleared\n", 3413f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3423f2304f8SSagi Grimberg return -EPROTO; 3433f2304f8SSagi Grimberg } 3443f2304f8SSagi Grimberg 3453f2304f8SSagi Grimberg recv_digest = *(__le32 *)(pdu + hdr->hlen); 3463f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->rcv_hash, pdu, pdu_len); 3473f2304f8SSagi Grimberg exp_digest = *(__le32 *)(pdu + hdr->hlen); 3483f2304f8SSagi Grimberg if (recv_digest != exp_digest) { 3493f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3503f2304f8SSagi Grimberg "header digest error: recv %#x expected %#x\n", 3513f2304f8SSagi Grimberg le32_to_cpu(recv_digest), le32_to_cpu(exp_digest)); 3523f2304f8SSagi Grimberg return -EIO; 3533f2304f8SSagi Grimberg } 3543f2304f8SSagi Grimberg 3553f2304f8SSagi Grimberg return 0; 3563f2304f8SSagi Grimberg } 3573f2304f8SSagi Grimberg 3583f2304f8SSagi Grimberg static int nvme_tcp_check_ddgst(struct nvme_tcp_queue *queue, void *pdu) 3593f2304f8SSagi Grimberg { 3603f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr = pdu; 3613f2304f8SSagi Grimberg u8 digest_len = nvme_tcp_hdgst_len(queue); 3623f2304f8SSagi Grimberg u32 len; 3633f2304f8SSagi Grimberg 3643f2304f8SSagi Grimberg len = le32_to_cpu(hdr->plen) - hdr->hlen - 3653f2304f8SSagi Grimberg ((hdr->flags & NVME_TCP_F_HDGST) ? digest_len : 0); 3663f2304f8SSagi Grimberg 3673f2304f8SSagi Grimberg if (unlikely(len && !(hdr->flags & NVME_TCP_F_DDGST))) { 3683f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 3693f2304f8SSagi Grimberg "queue %d: data digest flag is cleared\n", 3703f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 3713f2304f8SSagi Grimberg return -EPROTO; 3723f2304f8SSagi Grimberg } 3733f2304f8SSagi Grimberg crypto_ahash_init(queue->rcv_hash); 3743f2304f8SSagi Grimberg 3753f2304f8SSagi Grimberg return 0; 3763f2304f8SSagi Grimberg } 3773f2304f8SSagi Grimberg 3783f2304f8SSagi Grimberg static void nvme_tcp_exit_request(struct blk_mq_tag_set *set, 3793f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx) 3803f2304f8SSagi Grimberg { 3813f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 3823f2304f8SSagi Grimberg 3833f2304f8SSagi Grimberg page_frag_free(req->pdu); 3843f2304f8SSagi Grimberg } 3853f2304f8SSagi Grimberg 3863f2304f8SSagi Grimberg static int nvme_tcp_init_request(struct blk_mq_tag_set *set, 3873f2304f8SSagi Grimberg struct request *rq, unsigned int hctx_idx, 3883f2304f8SSagi Grimberg unsigned int numa_node) 3893f2304f8SSagi Grimberg { 3903f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 3913f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 3923f2304f8SSagi Grimberg int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; 3933f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[queue_idx]; 3943f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 3953f2304f8SSagi Grimberg 3963f2304f8SSagi Grimberg req->pdu = page_frag_alloc(&queue->pf_cache, 3973f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 3983f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 3993f2304f8SSagi Grimberg if (!req->pdu) 4003f2304f8SSagi Grimberg return -ENOMEM; 4013f2304f8SSagi Grimberg 4023f2304f8SSagi Grimberg req->queue = queue; 4033f2304f8SSagi Grimberg nvme_req(rq)->ctrl = &ctrl->ctrl; 4043f2304f8SSagi Grimberg 4053f2304f8SSagi Grimberg return 0; 4063f2304f8SSagi Grimberg } 4073f2304f8SSagi Grimberg 4083f2304f8SSagi Grimberg static int nvme_tcp_init_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4093f2304f8SSagi Grimberg unsigned int hctx_idx) 4103f2304f8SSagi Grimberg { 4113f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4123f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[hctx_idx + 1]; 4133f2304f8SSagi Grimberg 4143f2304f8SSagi Grimberg hctx->driver_data = queue; 4153f2304f8SSagi Grimberg return 0; 4163f2304f8SSagi Grimberg } 4173f2304f8SSagi Grimberg 4183f2304f8SSagi Grimberg static int nvme_tcp_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data, 4193f2304f8SSagi Grimberg unsigned int hctx_idx) 4203f2304f8SSagi Grimberg { 4213f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = data; 4223f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 4233f2304f8SSagi Grimberg 4243f2304f8SSagi Grimberg hctx->driver_data = queue; 4253f2304f8SSagi Grimberg return 0; 4263f2304f8SSagi Grimberg } 4273f2304f8SSagi Grimberg 4283f2304f8SSagi Grimberg static enum nvme_tcp_recv_state 4293f2304f8SSagi Grimberg nvme_tcp_recv_state(struct nvme_tcp_queue *queue) 4303f2304f8SSagi Grimberg { 4313f2304f8SSagi Grimberg return (queue->pdu_remaining) ? NVME_TCP_RECV_PDU : 4323f2304f8SSagi Grimberg (queue->ddgst_remaining) ? NVME_TCP_RECV_DDGST : 4333f2304f8SSagi Grimberg NVME_TCP_RECV_DATA; 4343f2304f8SSagi Grimberg } 4353f2304f8SSagi Grimberg 4363f2304f8SSagi Grimberg static void nvme_tcp_init_recv_ctx(struct nvme_tcp_queue *queue) 4373f2304f8SSagi Grimberg { 4383f2304f8SSagi Grimberg queue->pdu_remaining = sizeof(struct nvme_tcp_rsp_pdu) + 4393f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 4403f2304f8SSagi Grimberg queue->pdu_offset = 0; 4413f2304f8SSagi Grimberg queue->data_remaining = -1; 4423f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 4433f2304f8SSagi Grimberg } 4443f2304f8SSagi Grimberg 4453f2304f8SSagi Grimberg static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl) 4463f2304f8SSagi Grimberg { 4473f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) 4483f2304f8SSagi Grimberg return; 4493f2304f8SSagi Grimberg 45097b2512aSNigel Kirkland queue_work(nvme_reset_wq, &to_tcp_ctrl(ctrl)->err_work); 4513f2304f8SSagi Grimberg } 4523f2304f8SSagi Grimberg 4533f2304f8SSagi Grimberg static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue, 4543f2304f8SSagi Grimberg struct nvme_completion *cqe) 4553f2304f8SSagi Grimberg { 4563f2304f8SSagi Grimberg struct request *rq; 4573f2304f8SSagi Grimberg 4583f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), cqe->command_id); 4593f2304f8SSagi Grimberg if (!rq) { 4603f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4613f2304f8SSagi Grimberg "queue %d tag 0x%x not found\n", 4623f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), cqe->command_id); 4633f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 4643f2304f8SSagi Grimberg return -EINVAL; 4653f2304f8SSagi Grimberg } 4663f2304f8SSagi Grimberg 4673f2304f8SSagi Grimberg nvme_end_request(rq, cqe->status, cqe->result); 4681a9460ceSSagi Grimberg queue->nr_cqe++; 4693f2304f8SSagi Grimberg 4703f2304f8SSagi Grimberg return 0; 4713f2304f8SSagi Grimberg } 4723f2304f8SSagi Grimberg 4733f2304f8SSagi Grimberg static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue, 4743f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu) 4753f2304f8SSagi Grimberg { 4763f2304f8SSagi Grimberg struct request *rq; 4773f2304f8SSagi Grimberg 4783f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 4793f2304f8SSagi Grimberg if (!rq) { 4803f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4813f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 4823f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 4833f2304f8SSagi Grimberg return -ENOENT; 4843f2304f8SSagi Grimberg } 4853f2304f8SSagi Grimberg 4863f2304f8SSagi Grimberg if (!blk_rq_payload_bytes(rq)) { 4873f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 4883f2304f8SSagi Grimberg "queue %d tag %#x unexpected data\n", 4893f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 4903f2304f8SSagi Grimberg return -EIO; 4913f2304f8SSagi Grimberg } 4923f2304f8SSagi Grimberg 4933f2304f8SSagi Grimberg queue->data_remaining = le32_to_cpu(pdu->data_length); 4943f2304f8SSagi Grimberg 495602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS && 496602d674cSSagi Grimberg unlikely(!(pdu->hdr.flags & NVME_TCP_F_DATA_LAST))) { 497602d674cSSagi Grimberg dev_err(queue->ctrl->ctrl.device, 498602d674cSSagi Grimberg "queue %d tag %#x SUCCESS set but not last PDU\n", 499602d674cSSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 500602d674cSSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 501602d674cSSagi Grimberg return -EPROTO; 502602d674cSSagi Grimberg } 503602d674cSSagi Grimberg 5043f2304f8SSagi Grimberg return 0; 5053f2304f8SSagi Grimberg } 5063f2304f8SSagi Grimberg 5073f2304f8SSagi Grimberg static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue, 5083f2304f8SSagi Grimberg struct nvme_tcp_rsp_pdu *pdu) 5093f2304f8SSagi Grimberg { 5103f2304f8SSagi Grimberg struct nvme_completion *cqe = &pdu->cqe; 5113f2304f8SSagi Grimberg int ret = 0; 5123f2304f8SSagi Grimberg 5133f2304f8SSagi Grimberg /* 5143f2304f8SSagi Grimberg * AEN requests are special as they don't time out and can 5153f2304f8SSagi Grimberg * survive any kind of queue freeze and often don't respond to 5163f2304f8SSagi Grimberg * aborts. We don't even bother to allocate a struct request 5173f2304f8SSagi Grimberg * for them but rather special case them here. 5183f2304f8SSagi Grimberg */ 51958a8df67SIsrael Rukshin if (unlikely(nvme_is_aen_req(nvme_tcp_queue_id(queue), 52058a8df67SIsrael Rukshin cqe->command_id))) 5213f2304f8SSagi Grimberg nvme_complete_async_event(&queue->ctrl->ctrl, cqe->status, 5223f2304f8SSagi Grimberg &cqe->result); 5233f2304f8SSagi Grimberg else 5243f2304f8SSagi Grimberg ret = nvme_tcp_process_nvme_cqe(queue, cqe); 5253f2304f8SSagi Grimberg 5263f2304f8SSagi Grimberg return ret; 5273f2304f8SSagi Grimberg } 5283f2304f8SSagi Grimberg 5293f2304f8SSagi Grimberg static int nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req, 5303f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5313f2304f8SSagi Grimberg { 5323f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *data = req->pdu; 5333f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 5343f2304f8SSagi Grimberg struct request *rq = blk_mq_rq_from_pdu(req); 5353f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 5363f2304f8SSagi Grimberg u8 ddgst = nvme_tcp_ddgst_len(queue); 5373f2304f8SSagi Grimberg 5383f2304f8SSagi Grimberg req->pdu_len = le32_to_cpu(pdu->r2t_length); 5393f2304f8SSagi Grimberg req->pdu_sent = 0; 5403f2304f8SSagi Grimberg 5413f2304f8SSagi Grimberg if (unlikely(req->data_sent + req->pdu_len > req->data_len)) { 5423f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5433f2304f8SSagi Grimberg "req %d r2t len %u exceeded data len %u (%zu sent)\n", 5443f2304f8SSagi Grimberg rq->tag, req->pdu_len, req->data_len, 5453f2304f8SSagi Grimberg req->data_sent); 5463f2304f8SSagi Grimberg return -EPROTO; 5473f2304f8SSagi Grimberg } 5483f2304f8SSagi Grimberg 5493f2304f8SSagi Grimberg if (unlikely(le32_to_cpu(pdu->r2t_offset) < req->data_sent)) { 5503f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5513f2304f8SSagi Grimberg "req %d unexpected r2t offset %u (expected %zu)\n", 5523f2304f8SSagi Grimberg rq->tag, le32_to_cpu(pdu->r2t_offset), 5533f2304f8SSagi Grimberg req->data_sent); 5543f2304f8SSagi Grimberg return -EPROTO; 5553f2304f8SSagi Grimberg } 5563f2304f8SSagi Grimberg 5573f2304f8SSagi Grimberg memset(data, 0, sizeof(*data)); 5583f2304f8SSagi Grimberg data->hdr.type = nvme_tcp_h2c_data; 5593f2304f8SSagi Grimberg data->hdr.flags = NVME_TCP_F_DATA_LAST; 5603f2304f8SSagi Grimberg if (queue->hdr_digest) 5613f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_HDGST; 5623f2304f8SSagi Grimberg if (queue->data_digest) 5633f2304f8SSagi Grimberg data->hdr.flags |= NVME_TCP_F_DDGST; 5643f2304f8SSagi Grimberg data->hdr.hlen = sizeof(*data); 5653f2304f8SSagi Grimberg data->hdr.pdo = data->hdr.hlen + hdgst; 5663f2304f8SSagi Grimberg data->hdr.plen = 5673f2304f8SSagi Grimberg cpu_to_le32(data->hdr.hlen + hdgst + req->pdu_len + ddgst); 5683f2304f8SSagi Grimberg data->ttag = pdu->ttag; 5693f2304f8SSagi Grimberg data->command_id = rq->tag; 5703f2304f8SSagi Grimberg data->data_offset = cpu_to_le32(req->data_sent); 5713f2304f8SSagi Grimberg data->data_length = cpu_to_le32(req->pdu_len); 5723f2304f8SSagi Grimberg return 0; 5733f2304f8SSagi Grimberg } 5743f2304f8SSagi Grimberg 5753f2304f8SSagi Grimberg static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue, 5763f2304f8SSagi Grimberg struct nvme_tcp_r2t_pdu *pdu) 5773f2304f8SSagi Grimberg { 5783f2304f8SSagi Grimberg struct nvme_tcp_request *req; 5793f2304f8SSagi Grimberg struct request *rq; 5803f2304f8SSagi Grimberg int ret; 5813f2304f8SSagi Grimberg 5823f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 5833f2304f8SSagi Grimberg if (!rq) { 5843f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 5853f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 5863f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 5873f2304f8SSagi Grimberg return -ENOENT; 5883f2304f8SSagi Grimberg } 5893f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 5903f2304f8SSagi Grimberg 5913f2304f8SSagi Grimberg ret = nvme_tcp_setup_h2c_data_pdu(req, pdu); 5923f2304f8SSagi Grimberg if (unlikely(ret)) 5933f2304f8SSagi Grimberg return ret; 5943f2304f8SSagi Grimberg 5953f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_H2C_PDU; 5963f2304f8SSagi Grimberg req->offset = 0; 5973f2304f8SSagi Grimberg 598db5ad6b7SSagi Grimberg nvme_tcp_queue_request(req, false); 5993f2304f8SSagi Grimberg 6003f2304f8SSagi Grimberg return 0; 6013f2304f8SSagi Grimberg } 6023f2304f8SSagi Grimberg 6033f2304f8SSagi Grimberg static int nvme_tcp_recv_pdu(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6043f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6053f2304f8SSagi Grimberg { 6063f2304f8SSagi Grimberg struct nvme_tcp_hdr *hdr; 6073f2304f8SSagi Grimberg char *pdu = queue->pdu; 6083f2304f8SSagi Grimberg size_t rcv_len = min_t(size_t, *len, queue->pdu_remaining); 6093f2304f8SSagi Grimberg int ret; 6103f2304f8SSagi Grimberg 6113f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, 6123f2304f8SSagi Grimberg &pdu[queue->pdu_offset], rcv_len); 6133f2304f8SSagi Grimberg if (unlikely(ret)) 6143f2304f8SSagi Grimberg return ret; 6153f2304f8SSagi Grimberg 6163f2304f8SSagi Grimberg queue->pdu_remaining -= rcv_len; 6173f2304f8SSagi Grimberg queue->pdu_offset += rcv_len; 6183f2304f8SSagi Grimberg *offset += rcv_len; 6193f2304f8SSagi Grimberg *len -= rcv_len; 6203f2304f8SSagi Grimberg if (queue->pdu_remaining) 6213f2304f8SSagi Grimberg return 0; 6223f2304f8SSagi Grimberg 6233f2304f8SSagi Grimberg hdr = queue->pdu; 6243f2304f8SSagi Grimberg if (queue->hdr_digest) { 6253f2304f8SSagi Grimberg ret = nvme_tcp_verify_hdgst(queue, queue->pdu, hdr->hlen); 6263f2304f8SSagi Grimberg if (unlikely(ret)) 6273f2304f8SSagi Grimberg return ret; 6283f2304f8SSagi Grimberg } 6293f2304f8SSagi Grimberg 6303f2304f8SSagi Grimberg 6313f2304f8SSagi Grimberg if (queue->data_digest) { 6323f2304f8SSagi Grimberg ret = nvme_tcp_check_ddgst(queue, queue->pdu); 6333f2304f8SSagi Grimberg if (unlikely(ret)) 6343f2304f8SSagi Grimberg return ret; 6353f2304f8SSagi Grimberg } 6363f2304f8SSagi Grimberg 6373f2304f8SSagi Grimberg switch (hdr->type) { 6383f2304f8SSagi Grimberg case nvme_tcp_c2h_data: 6396be18260SSagi Grimberg return nvme_tcp_handle_c2h_data(queue, (void *)queue->pdu); 6403f2304f8SSagi Grimberg case nvme_tcp_rsp: 6413f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6426be18260SSagi Grimberg return nvme_tcp_handle_comp(queue, (void *)queue->pdu); 6433f2304f8SSagi Grimberg case nvme_tcp_r2t: 6443f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6456be18260SSagi Grimberg return nvme_tcp_handle_r2t(queue, (void *)queue->pdu); 6463f2304f8SSagi Grimberg default: 6473f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6483f2304f8SSagi Grimberg "unsupported pdu type (%d)\n", hdr->type); 6493f2304f8SSagi Grimberg return -EINVAL; 6503f2304f8SSagi Grimberg } 6513f2304f8SSagi Grimberg } 6523f2304f8SSagi Grimberg 653988aef9eSChristoph Hellwig static inline void nvme_tcp_end_request(struct request *rq, u16 status) 654602d674cSSagi Grimberg { 655602d674cSSagi Grimberg union nvme_result res = {}; 656602d674cSSagi Grimberg 657602d674cSSagi Grimberg nvme_end_request(rq, cpu_to_le16(status << 1), res); 658602d674cSSagi Grimberg } 659602d674cSSagi Grimberg 6603f2304f8SSagi Grimberg static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb, 6613f2304f8SSagi Grimberg unsigned int *offset, size_t *len) 6623f2304f8SSagi Grimberg { 6633f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 6643f2304f8SSagi Grimberg struct nvme_tcp_request *req; 6653f2304f8SSagi Grimberg struct request *rq; 6663f2304f8SSagi Grimberg 6673f2304f8SSagi Grimberg rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id); 6683f2304f8SSagi Grimberg if (!rq) { 6693f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6703f2304f8SSagi Grimberg "queue %d tag %#x not found\n", 6713f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), pdu->command_id); 6723f2304f8SSagi Grimberg return -ENOENT; 6733f2304f8SSagi Grimberg } 6743f2304f8SSagi Grimberg req = blk_mq_rq_to_pdu(rq); 6753f2304f8SSagi Grimberg 6763f2304f8SSagi Grimberg while (true) { 6773f2304f8SSagi Grimberg int recv_len, ret; 6783f2304f8SSagi Grimberg 6793f2304f8SSagi Grimberg recv_len = min_t(size_t, *len, queue->data_remaining); 6803f2304f8SSagi Grimberg if (!recv_len) 6813f2304f8SSagi Grimberg break; 6823f2304f8SSagi Grimberg 6833f2304f8SSagi Grimberg if (!iov_iter_count(&req->iter)) { 6843f2304f8SSagi Grimberg req->curr_bio = req->curr_bio->bi_next; 6853f2304f8SSagi Grimberg 6863f2304f8SSagi Grimberg /* 6873f2304f8SSagi Grimberg * If we don`t have any bios it means that controller 6883f2304f8SSagi Grimberg * sent more data than we requested, hence error 6893f2304f8SSagi Grimberg */ 6903f2304f8SSagi Grimberg if (!req->curr_bio) { 6913f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 6923f2304f8SSagi Grimberg "queue %d no space in request %#x", 6933f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 6943f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 6953f2304f8SSagi Grimberg return -EIO; 6963f2304f8SSagi Grimberg } 6973f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 6983f2304f8SSagi Grimberg } 6993f2304f8SSagi Grimberg 7003f2304f8SSagi Grimberg /* we can read only from what is left in this bio */ 7013f2304f8SSagi Grimberg recv_len = min_t(size_t, recv_len, 7023f2304f8SSagi Grimberg iov_iter_count(&req->iter)); 7033f2304f8SSagi Grimberg 7043f2304f8SSagi Grimberg if (queue->data_digest) 7053f2304f8SSagi Grimberg ret = skb_copy_and_hash_datagram_iter(skb, *offset, 7063f2304f8SSagi Grimberg &req->iter, recv_len, queue->rcv_hash); 7073f2304f8SSagi Grimberg else 7083f2304f8SSagi Grimberg ret = skb_copy_datagram_iter(skb, *offset, 7093f2304f8SSagi Grimberg &req->iter, recv_len); 7103f2304f8SSagi Grimberg if (ret) { 7113f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7123f2304f8SSagi Grimberg "queue %d failed to copy request %#x data", 7133f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), rq->tag); 7143f2304f8SSagi Grimberg return ret; 7153f2304f8SSagi Grimberg } 7163f2304f8SSagi Grimberg 7173f2304f8SSagi Grimberg *len -= recv_len; 7183f2304f8SSagi Grimberg *offset += recv_len; 7193f2304f8SSagi Grimberg queue->data_remaining -= recv_len; 7203f2304f8SSagi Grimberg } 7213f2304f8SSagi Grimberg 7223f2304f8SSagi Grimberg if (!queue->data_remaining) { 7233f2304f8SSagi Grimberg if (queue->data_digest) { 7243f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->rcv_hash, &queue->exp_ddgst); 7253f2304f8SSagi Grimberg queue->ddgst_remaining = NVME_TCP_DIGEST_LENGTH; 7263f2304f8SSagi Grimberg } else { 7271a9460ceSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 728602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7291a9460ceSSagi Grimberg queue->nr_cqe++; 7301a9460ceSSagi Grimberg } 7313f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7323f2304f8SSagi Grimberg } 7333f2304f8SSagi Grimberg } 7343f2304f8SSagi Grimberg 7353f2304f8SSagi Grimberg return 0; 7363f2304f8SSagi Grimberg } 7373f2304f8SSagi Grimberg 7383f2304f8SSagi Grimberg static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue, 7393f2304f8SSagi Grimberg struct sk_buff *skb, unsigned int *offset, size_t *len) 7403f2304f8SSagi Grimberg { 741602d674cSSagi Grimberg struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu; 7423f2304f8SSagi Grimberg char *ddgst = (char *)&queue->recv_ddgst; 7433f2304f8SSagi Grimberg size_t recv_len = min_t(size_t, *len, queue->ddgst_remaining); 7443f2304f8SSagi Grimberg off_t off = NVME_TCP_DIGEST_LENGTH - queue->ddgst_remaining; 7453f2304f8SSagi Grimberg int ret; 7463f2304f8SSagi Grimberg 7473f2304f8SSagi Grimberg ret = skb_copy_bits(skb, *offset, &ddgst[off], recv_len); 7483f2304f8SSagi Grimberg if (unlikely(ret)) 7493f2304f8SSagi Grimberg return ret; 7503f2304f8SSagi Grimberg 7513f2304f8SSagi Grimberg queue->ddgst_remaining -= recv_len; 7523f2304f8SSagi Grimberg *offset += recv_len; 7533f2304f8SSagi Grimberg *len -= recv_len; 7543f2304f8SSagi Grimberg if (queue->ddgst_remaining) 7553f2304f8SSagi Grimberg return 0; 7563f2304f8SSagi Grimberg 7573f2304f8SSagi Grimberg if (queue->recv_ddgst != queue->exp_ddgst) { 7583f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 7593f2304f8SSagi Grimberg "data digest error: recv %#x expected %#x\n", 7603f2304f8SSagi Grimberg le32_to_cpu(queue->recv_ddgst), 7613f2304f8SSagi Grimberg le32_to_cpu(queue->exp_ddgst)); 7623f2304f8SSagi Grimberg return -EIO; 7633f2304f8SSagi Grimberg } 7643f2304f8SSagi Grimberg 765602d674cSSagi Grimberg if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) { 766602d674cSSagi Grimberg struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), 767602d674cSSagi Grimberg pdu->command_id); 768602d674cSSagi Grimberg 769602d674cSSagi Grimberg nvme_tcp_end_request(rq, NVME_SC_SUCCESS); 7701a9460ceSSagi Grimberg queue->nr_cqe++; 771602d674cSSagi Grimberg } 772602d674cSSagi Grimberg 7733f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 7743f2304f8SSagi Grimberg return 0; 7753f2304f8SSagi Grimberg } 7763f2304f8SSagi Grimberg 7773f2304f8SSagi Grimberg static int nvme_tcp_recv_skb(read_descriptor_t *desc, struct sk_buff *skb, 7783f2304f8SSagi Grimberg unsigned int offset, size_t len) 7793f2304f8SSagi Grimberg { 7803f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = desc->arg.data; 7813f2304f8SSagi Grimberg size_t consumed = len; 7823f2304f8SSagi Grimberg int result; 7833f2304f8SSagi Grimberg 7843f2304f8SSagi Grimberg while (len) { 7853f2304f8SSagi Grimberg switch (nvme_tcp_recv_state(queue)) { 7863f2304f8SSagi Grimberg case NVME_TCP_RECV_PDU: 7873f2304f8SSagi Grimberg result = nvme_tcp_recv_pdu(queue, skb, &offset, &len); 7883f2304f8SSagi Grimberg break; 7893f2304f8SSagi Grimberg case NVME_TCP_RECV_DATA: 7903f2304f8SSagi Grimberg result = nvme_tcp_recv_data(queue, skb, &offset, &len); 7913f2304f8SSagi Grimberg break; 7923f2304f8SSagi Grimberg case NVME_TCP_RECV_DDGST: 7933f2304f8SSagi Grimberg result = nvme_tcp_recv_ddgst(queue, skb, &offset, &len); 7943f2304f8SSagi Grimberg break; 7953f2304f8SSagi Grimberg default: 7963f2304f8SSagi Grimberg result = -EFAULT; 7973f2304f8SSagi Grimberg } 7983f2304f8SSagi Grimberg if (result) { 7993f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 8003f2304f8SSagi Grimberg "receive failed: %d\n", result); 8013f2304f8SSagi Grimberg queue->rd_enabled = false; 8023f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8033f2304f8SSagi Grimberg return result; 8043f2304f8SSagi Grimberg } 8053f2304f8SSagi Grimberg } 8063f2304f8SSagi Grimberg 8073f2304f8SSagi Grimberg return consumed; 8083f2304f8SSagi Grimberg } 8093f2304f8SSagi Grimberg 8103f2304f8SSagi Grimberg static void nvme_tcp_data_ready(struct sock *sk) 8113f2304f8SSagi Grimberg { 8123f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8133f2304f8SSagi Grimberg 814386e5e6eSSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8153f2304f8SSagi Grimberg queue = sk->sk_user_data; 81672e5d757SSagi Grimberg if (likely(queue && queue->rd_enabled) && 81772e5d757SSagi Grimberg !test_bit(NVME_TCP_Q_POLLING, &queue->flags)) 8183f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 819386e5e6eSSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8203f2304f8SSagi Grimberg } 8213f2304f8SSagi Grimberg 8223f2304f8SSagi Grimberg static void nvme_tcp_write_space(struct sock *sk) 8233f2304f8SSagi Grimberg { 8243f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8253f2304f8SSagi Grimberg 8263f2304f8SSagi Grimberg read_lock_bh(&sk->sk_callback_lock); 8273f2304f8SSagi Grimberg queue = sk->sk_user_data; 8283f2304f8SSagi Grimberg if (likely(queue && sk_stream_is_writeable(sk))) { 8293f2304f8SSagi Grimberg clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); 8303f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 8313f2304f8SSagi Grimberg } 8323f2304f8SSagi Grimberg read_unlock_bh(&sk->sk_callback_lock); 8333f2304f8SSagi Grimberg } 8343f2304f8SSagi Grimberg 8353f2304f8SSagi Grimberg static void nvme_tcp_state_change(struct sock *sk) 8363f2304f8SSagi Grimberg { 8373f2304f8SSagi Grimberg struct nvme_tcp_queue *queue; 8383f2304f8SSagi Grimberg 8393f2304f8SSagi Grimberg read_lock(&sk->sk_callback_lock); 8403f2304f8SSagi Grimberg queue = sk->sk_user_data; 8413f2304f8SSagi Grimberg if (!queue) 8423f2304f8SSagi Grimberg goto done; 8433f2304f8SSagi Grimberg 8443f2304f8SSagi Grimberg switch (sk->sk_state) { 8453f2304f8SSagi Grimberg case TCP_CLOSE: 8463f2304f8SSagi Grimberg case TCP_CLOSE_WAIT: 8473f2304f8SSagi Grimberg case TCP_LAST_ACK: 8483f2304f8SSagi Grimberg case TCP_FIN_WAIT1: 8493f2304f8SSagi Grimberg case TCP_FIN_WAIT2: 8503f2304f8SSagi Grimberg /* fallthrough */ 8513f2304f8SSagi Grimberg nvme_tcp_error_recovery(&queue->ctrl->ctrl); 8523f2304f8SSagi Grimberg break; 8533f2304f8SSagi Grimberg default: 8543f2304f8SSagi Grimberg dev_info(queue->ctrl->ctrl.device, 8553f2304f8SSagi Grimberg "queue %d socket state %d\n", 8563f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), sk->sk_state); 8573f2304f8SSagi Grimberg } 8583f2304f8SSagi Grimberg 8593f2304f8SSagi Grimberg queue->state_change(sk); 8603f2304f8SSagi Grimberg done: 8613f2304f8SSagi Grimberg read_unlock(&sk->sk_callback_lock); 8623f2304f8SSagi Grimberg } 8633f2304f8SSagi Grimberg 8643f2304f8SSagi Grimberg static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue) 8653f2304f8SSagi Grimberg { 8663f2304f8SSagi Grimberg queue->request = NULL; 8673f2304f8SSagi Grimberg } 8683f2304f8SSagi Grimberg 8693f2304f8SSagi Grimberg static void nvme_tcp_fail_request(struct nvme_tcp_request *req) 8703f2304f8SSagi Grimberg { 87116686010SSagi Grimberg nvme_tcp_end_request(blk_mq_rq_from_pdu(req), NVME_SC_HOST_PATH_ERROR); 8723f2304f8SSagi Grimberg } 8733f2304f8SSagi Grimberg 8743f2304f8SSagi Grimberg static int nvme_tcp_try_send_data(struct nvme_tcp_request *req) 8753f2304f8SSagi Grimberg { 8763f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 8773f2304f8SSagi Grimberg 8783f2304f8SSagi Grimberg while (true) { 8793f2304f8SSagi Grimberg struct page *page = nvme_tcp_req_cur_page(req); 8803f2304f8SSagi Grimberg size_t offset = nvme_tcp_req_cur_offset(req); 8813f2304f8SSagi Grimberg size_t len = nvme_tcp_req_cur_length(req); 8823f2304f8SSagi Grimberg bool last = nvme_tcp_pdu_last_send(req, len); 8833f2304f8SSagi Grimberg int ret, flags = MSG_DONTWAIT; 8843f2304f8SSagi Grimberg 8853f2304f8SSagi Grimberg if (last && !queue->data_digest) 8863f2304f8SSagi Grimberg flags |= MSG_EOR; 8873f2304f8SSagi Grimberg else 8885bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 8893f2304f8SSagi Grimberg 89037c15219SMikhail Skorzhinskii /* can't zcopy slab pages */ 89137c15219SMikhail Skorzhinskii if (unlikely(PageSlab(page))) { 89237c15219SMikhail Skorzhinskii ret = sock_no_sendpage(queue->sock, page, offset, len, 89337c15219SMikhail Skorzhinskii flags); 89437c15219SMikhail Skorzhinskii } else { 89537c15219SMikhail Skorzhinskii ret = kernel_sendpage(queue->sock, page, offset, len, 89637c15219SMikhail Skorzhinskii flags); 89737c15219SMikhail Skorzhinskii } 8983f2304f8SSagi Grimberg if (ret <= 0) 8993f2304f8SSagi Grimberg return ret; 9003f2304f8SSagi Grimberg 9013f2304f8SSagi Grimberg nvme_tcp_advance_req(req, ret); 9023f2304f8SSagi Grimberg if (queue->data_digest) 9033f2304f8SSagi Grimberg nvme_tcp_ddgst_update(queue->snd_hash, page, 9043f2304f8SSagi Grimberg offset, ret); 9053f2304f8SSagi Grimberg 9063f2304f8SSagi Grimberg /* fully successful last write*/ 9073f2304f8SSagi Grimberg if (last && ret == len) { 9083f2304f8SSagi Grimberg if (queue->data_digest) { 9093f2304f8SSagi Grimberg nvme_tcp_ddgst_final(queue->snd_hash, 9103f2304f8SSagi Grimberg &req->ddgst); 9113f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DDGST; 9123f2304f8SSagi Grimberg req->offset = 0; 9133f2304f8SSagi Grimberg } else { 9143f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9153f2304f8SSagi Grimberg } 9163f2304f8SSagi Grimberg return 1; 9173f2304f8SSagi Grimberg } 9183f2304f8SSagi Grimberg } 9193f2304f8SSagi Grimberg return -EAGAIN; 9203f2304f8SSagi Grimberg } 9213f2304f8SSagi Grimberg 9223f2304f8SSagi Grimberg static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req) 9233f2304f8SSagi Grimberg { 9243f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9253f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 9263f2304f8SSagi Grimberg bool inline_data = nvme_tcp_has_inline_data(req); 9273f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9283f2304f8SSagi Grimberg int len = sizeof(*pdu) + hdgst - req->offset; 9295bb052d7SSagi Grimberg int flags = MSG_DONTWAIT; 9303f2304f8SSagi Grimberg int ret; 9313f2304f8SSagi Grimberg 9325bb052d7SSagi Grimberg if (inline_data) 9335bb052d7SSagi Grimberg flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST; 9345bb052d7SSagi Grimberg else 9355bb052d7SSagi Grimberg flags |= MSG_EOR; 9365bb052d7SSagi Grimberg 9373f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9383f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9393f2304f8SSagi Grimberg 9403f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9413f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, flags); 9423f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9433f2304f8SSagi Grimberg return ret; 9443f2304f8SSagi Grimberg 9453f2304f8SSagi Grimberg len -= ret; 9463f2304f8SSagi Grimberg if (!len) { 9473f2304f8SSagi Grimberg if (inline_data) { 9483f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9493f2304f8SSagi Grimberg if (queue->data_digest) 9503f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9513f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 9523f2304f8SSagi Grimberg } else { 9533f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 9543f2304f8SSagi Grimberg } 9553f2304f8SSagi Grimberg return 1; 9563f2304f8SSagi Grimberg } 9573f2304f8SSagi Grimberg req->offset += ret; 9583f2304f8SSagi Grimberg 9593f2304f8SSagi Grimberg return -EAGAIN; 9603f2304f8SSagi Grimberg } 9613f2304f8SSagi Grimberg 9623f2304f8SSagi Grimberg static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req) 9633f2304f8SSagi Grimberg { 9643f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9653f2304f8SSagi Grimberg struct nvme_tcp_data_pdu *pdu = req->pdu; 9663f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 9673f2304f8SSagi Grimberg int len = sizeof(*pdu) - req->offset + hdgst; 9683f2304f8SSagi Grimberg int ret; 9693f2304f8SSagi Grimberg 9703f2304f8SSagi Grimberg if (queue->hdr_digest && !req->offset) 9713f2304f8SSagi Grimberg nvme_tcp_hdgst(queue->snd_hash, pdu, sizeof(*pdu)); 9723f2304f8SSagi Grimberg 9733f2304f8SSagi Grimberg ret = kernel_sendpage(queue->sock, virt_to_page(pdu), 9743f2304f8SSagi Grimberg offset_in_page(pdu) + req->offset, len, 9755bb052d7SSagi Grimberg MSG_DONTWAIT | MSG_MORE | MSG_SENDPAGE_NOTLAST); 9763f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 9773f2304f8SSagi Grimberg return ret; 9783f2304f8SSagi Grimberg 9793f2304f8SSagi Grimberg len -= ret; 9803f2304f8SSagi Grimberg if (!len) { 9813f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_DATA; 9823f2304f8SSagi Grimberg if (queue->data_digest) 9833f2304f8SSagi Grimberg crypto_ahash_init(queue->snd_hash); 9843f2304f8SSagi Grimberg if (!req->data_sent) 9853f2304f8SSagi Grimberg nvme_tcp_init_iter(req, WRITE); 9863f2304f8SSagi Grimberg return 1; 9873f2304f8SSagi Grimberg } 9883f2304f8SSagi Grimberg req->offset += ret; 9893f2304f8SSagi Grimberg 9903f2304f8SSagi Grimberg return -EAGAIN; 9913f2304f8SSagi Grimberg } 9923f2304f8SSagi Grimberg 9933f2304f8SSagi Grimberg static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req) 9943f2304f8SSagi Grimberg { 9953f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 9963f2304f8SSagi Grimberg int ret; 9973f2304f8SSagi Grimberg struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_EOR }; 9983f2304f8SSagi Grimberg struct kvec iov = { 9993f2304f8SSagi Grimberg .iov_base = &req->ddgst + req->offset, 10003f2304f8SSagi Grimberg .iov_len = NVME_TCP_DIGEST_LENGTH - req->offset 10013f2304f8SSagi Grimberg }; 10023f2304f8SSagi Grimberg 10033f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 10043f2304f8SSagi Grimberg if (unlikely(ret <= 0)) 10053f2304f8SSagi Grimberg return ret; 10063f2304f8SSagi Grimberg 10073f2304f8SSagi Grimberg if (req->offset + ret == NVME_TCP_DIGEST_LENGTH) { 10083f2304f8SSagi Grimberg nvme_tcp_done_send_req(queue); 10093f2304f8SSagi Grimberg return 1; 10103f2304f8SSagi Grimberg } 10113f2304f8SSagi Grimberg 10123f2304f8SSagi Grimberg req->offset += ret; 10133f2304f8SSagi Grimberg return -EAGAIN; 10143f2304f8SSagi Grimberg } 10153f2304f8SSagi Grimberg 10163f2304f8SSagi Grimberg static int nvme_tcp_try_send(struct nvme_tcp_queue *queue) 10173f2304f8SSagi Grimberg { 10183f2304f8SSagi Grimberg struct nvme_tcp_request *req; 10193f2304f8SSagi Grimberg int ret = 1; 10203f2304f8SSagi Grimberg 10213f2304f8SSagi Grimberg if (!queue->request) { 10223f2304f8SSagi Grimberg queue->request = nvme_tcp_fetch_request(queue); 10233f2304f8SSagi Grimberg if (!queue->request) 10243f2304f8SSagi Grimberg return 0; 10253f2304f8SSagi Grimberg } 10263f2304f8SSagi Grimberg req = queue->request; 10273f2304f8SSagi Grimberg 10283f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_CMD_PDU) { 10293f2304f8SSagi Grimberg ret = nvme_tcp_try_send_cmd_pdu(req); 10303f2304f8SSagi Grimberg if (ret <= 0) 10313f2304f8SSagi Grimberg goto done; 10323f2304f8SSagi Grimberg if (!nvme_tcp_has_inline_data(req)) 10333f2304f8SSagi Grimberg return ret; 10343f2304f8SSagi Grimberg } 10353f2304f8SSagi Grimberg 10363f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_H2C_PDU) { 10373f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data_pdu(req); 10383f2304f8SSagi Grimberg if (ret <= 0) 10393f2304f8SSagi Grimberg goto done; 10403f2304f8SSagi Grimberg } 10413f2304f8SSagi Grimberg 10423f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DATA) { 10433f2304f8SSagi Grimberg ret = nvme_tcp_try_send_data(req); 10443f2304f8SSagi Grimberg if (ret <= 0) 10453f2304f8SSagi Grimberg goto done; 10463f2304f8SSagi Grimberg } 10473f2304f8SSagi Grimberg 10483f2304f8SSagi Grimberg if (req->state == NVME_TCP_SEND_DDGST) 10493f2304f8SSagi Grimberg ret = nvme_tcp_try_send_ddgst(req); 10503f2304f8SSagi Grimberg done: 10515ff4e112SSagi Grimberg if (ret == -EAGAIN) { 10523f2304f8SSagi Grimberg ret = 0; 10535ff4e112SSagi Grimberg } else if (ret < 0) { 10545ff4e112SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 10555ff4e112SSagi Grimberg "failed to send request %d\n", ret); 10565ff4e112SSagi Grimberg if (ret != -EPIPE && ret != -ECONNRESET) 10575ff4e112SSagi Grimberg nvme_tcp_fail_request(queue->request); 10585ff4e112SSagi Grimberg nvme_tcp_done_send_req(queue); 10595ff4e112SSagi Grimberg } 10603f2304f8SSagi Grimberg return ret; 10613f2304f8SSagi Grimberg } 10623f2304f8SSagi Grimberg 10633f2304f8SSagi Grimberg static int nvme_tcp_try_recv(struct nvme_tcp_queue *queue) 10643f2304f8SSagi Grimberg { 106510407ec9SPotnuri Bharat Teja struct socket *sock = queue->sock; 106610407ec9SPotnuri Bharat Teja struct sock *sk = sock->sk; 10673f2304f8SSagi Grimberg read_descriptor_t rd_desc; 10683f2304f8SSagi Grimberg int consumed; 10693f2304f8SSagi Grimberg 10703f2304f8SSagi Grimberg rd_desc.arg.data = queue; 10713f2304f8SSagi Grimberg rd_desc.count = 1; 10723f2304f8SSagi Grimberg lock_sock(sk); 10731a9460ceSSagi Grimberg queue->nr_cqe = 0; 107410407ec9SPotnuri Bharat Teja consumed = sock->ops->read_sock(sk, &rd_desc, nvme_tcp_recv_skb); 10753f2304f8SSagi Grimberg release_sock(sk); 10763f2304f8SSagi Grimberg return consumed; 10773f2304f8SSagi Grimberg } 10783f2304f8SSagi Grimberg 10793f2304f8SSagi Grimberg static void nvme_tcp_io_work(struct work_struct *w) 10803f2304f8SSagi Grimberg { 10813f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = 10823f2304f8SSagi Grimberg container_of(w, struct nvme_tcp_queue, io_work); 1083ddef2957SWunderlich, Mark unsigned long deadline = jiffies + msecs_to_jiffies(1); 10843f2304f8SSagi Grimberg 10853f2304f8SSagi Grimberg do { 10863f2304f8SSagi Grimberg bool pending = false; 10873f2304f8SSagi Grimberg int result; 10883f2304f8SSagi Grimberg 1089db5ad6b7SSagi Grimberg if (mutex_trylock(&queue->send_mutex)) { 10903f2304f8SSagi Grimberg result = nvme_tcp_try_send(queue); 1091db5ad6b7SSagi Grimberg mutex_unlock(&queue->send_mutex); 10925ff4e112SSagi Grimberg if (result > 0) 10933f2304f8SSagi Grimberg pending = true; 10945ff4e112SSagi Grimberg else if (unlikely(result < 0)) 10955ff4e112SSagi Grimberg break; 1096db5ad6b7SSagi Grimberg } 10973f2304f8SSagi Grimberg 10983f2304f8SSagi Grimberg result = nvme_tcp_try_recv(queue); 10993f2304f8SSagi Grimberg if (result > 0) 11003f2304f8SSagi Grimberg pending = true; 1101761ad26cSSagi Grimberg else if (unlikely(result < 0)) 110239d06079SSagi Grimberg return; 11033f2304f8SSagi Grimberg 11043f2304f8SSagi Grimberg if (!pending) 11053f2304f8SSagi Grimberg return; 11063f2304f8SSagi Grimberg 1107ddef2957SWunderlich, Mark } while (!time_after(jiffies, deadline)); /* quota is exhausted */ 11083f2304f8SSagi Grimberg 11093f2304f8SSagi Grimberg queue_work_on(queue->io_cpu, nvme_tcp_wq, &queue->io_work); 11103f2304f8SSagi Grimberg } 11113f2304f8SSagi Grimberg 11123f2304f8SSagi Grimberg static void nvme_tcp_free_crypto(struct nvme_tcp_queue *queue) 11133f2304f8SSagi Grimberg { 11143f2304f8SSagi Grimberg struct crypto_ahash *tfm = crypto_ahash_reqtfm(queue->rcv_hash); 11153f2304f8SSagi Grimberg 11163f2304f8SSagi Grimberg ahash_request_free(queue->rcv_hash); 11173f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11183f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11193f2304f8SSagi Grimberg } 11203f2304f8SSagi Grimberg 11213f2304f8SSagi Grimberg static int nvme_tcp_alloc_crypto(struct nvme_tcp_queue *queue) 11223f2304f8SSagi Grimberg { 11233f2304f8SSagi Grimberg struct crypto_ahash *tfm; 11243f2304f8SSagi Grimberg 11253f2304f8SSagi Grimberg tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 11263f2304f8SSagi Grimberg if (IS_ERR(tfm)) 11273f2304f8SSagi Grimberg return PTR_ERR(tfm); 11283f2304f8SSagi Grimberg 11293f2304f8SSagi Grimberg queue->snd_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11303f2304f8SSagi Grimberg if (!queue->snd_hash) 11313f2304f8SSagi Grimberg goto free_tfm; 11323f2304f8SSagi Grimberg ahash_request_set_callback(queue->snd_hash, 0, NULL, NULL); 11333f2304f8SSagi Grimberg 11343f2304f8SSagi Grimberg queue->rcv_hash = ahash_request_alloc(tfm, GFP_KERNEL); 11353f2304f8SSagi Grimberg if (!queue->rcv_hash) 11363f2304f8SSagi Grimberg goto free_snd_hash; 11373f2304f8SSagi Grimberg ahash_request_set_callback(queue->rcv_hash, 0, NULL, NULL); 11383f2304f8SSagi Grimberg 11393f2304f8SSagi Grimberg return 0; 11403f2304f8SSagi Grimberg free_snd_hash: 11413f2304f8SSagi Grimberg ahash_request_free(queue->snd_hash); 11423f2304f8SSagi Grimberg free_tfm: 11433f2304f8SSagi Grimberg crypto_free_ahash(tfm); 11443f2304f8SSagi Grimberg return -ENOMEM; 11453f2304f8SSagi Grimberg } 11463f2304f8SSagi Grimberg 11473f2304f8SSagi Grimberg static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl) 11483f2304f8SSagi Grimberg { 11493f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11503f2304f8SSagi Grimberg 11513f2304f8SSagi Grimberg page_frag_free(async->pdu); 11523f2304f8SSagi Grimberg } 11533f2304f8SSagi Grimberg 11543f2304f8SSagi Grimberg static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl) 11553f2304f8SSagi Grimberg { 11563f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 11573f2304f8SSagi Grimberg struct nvme_tcp_request *async = &ctrl->async_req; 11583f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 11593f2304f8SSagi Grimberg 11603f2304f8SSagi Grimberg async->pdu = page_frag_alloc(&queue->pf_cache, 11613f2304f8SSagi Grimberg sizeof(struct nvme_tcp_cmd_pdu) + hdgst, 11623f2304f8SSagi Grimberg GFP_KERNEL | __GFP_ZERO); 11633f2304f8SSagi Grimberg if (!async->pdu) 11643f2304f8SSagi Grimberg return -ENOMEM; 11653f2304f8SSagi Grimberg 11663f2304f8SSagi Grimberg async->queue = &ctrl->queues[0]; 11673f2304f8SSagi Grimberg return 0; 11683f2304f8SSagi Grimberg } 11693f2304f8SSagi Grimberg 11703f2304f8SSagi Grimberg static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid) 11713f2304f8SSagi Grimberg { 11723f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 11733f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 11743f2304f8SSagi Grimberg 11753f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_ALLOCATED, &queue->flags)) 11763f2304f8SSagi Grimberg return; 11773f2304f8SSagi Grimberg 11783f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 11793f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 11803f2304f8SSagi Grimberg 11813f2304f8SSagi Grimberg sock_release(queue->sock); 11823f2304f8SSagi Grimberg kfree(queue->pdu); 11833f2304f8SSagi Grimberg } 11843f2304f8SSagi Grimberg 11853f2304f8SSagi Grimberg static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue) 11863f2304f8SSagi Grimberg { 11873f2304f8SSagi Grimberg struct nvme_tcp_icreq_pdu *icreq; 11883f2304f8SSagi Grimberg struct nvme_tcp_icresp_pdu *icresp; 11893f2304f8SSagi Grimberg struct msghdr msg = {}; 11903f2304f8SSagi Grimberg struct kvec iov; 11913f2304f8SSagi Grimberg bool ctrl_hdgst, ctrl_ddgst; 11923f2304f8SSagi Grimberg int ret; 11933f2304f8SSagi Grimberg 11943f2304f8SSagi Grimberg icreq = kzalloc(sizeof(*icreq), GFP_KERNEL); 11953f2304f8SSagi Grimberg if (!icreq) 11963f2304f8SSagi Grimberg return -ENOMEM; 11973f2304f8SSagi Grimberg 11983f2304f8SSagi Grimberg icresp = kzalloc(sizeof(*icresp), GFP_KERNEL); 11993f2304f8SSagi Grimberg if (!icresp) { 12003f2304f8SSagi Grimberg ret = -ENOMEM; 12013f2304f8SSagi Grimberg goto free_icreq; 12023f2304f8SSagi Grimberg } 12033f2304f8SSagi Grimberg 12043f2304f8SSagi Grimberg icreq->hdr.type = nvme_tcp_icreq; 12053f2304f8SSagi Grimberg icreq->hdr.hlen = sizeof(*icreq); 12063f2304f8SSagi Grimberg icreq->hdr.pdo = 0; 12073f2304f8SSagi Grimberg icreq->hdr.plen = cpu_to_le32(icreq->hdr.hlen); 12083f2304f8SSagi Grimberg icreq->pfv = cpu_to_le16(NVME_TCP_PFV_1_0); 12093f2304f8SSagi Grimberg icreq->maxr2t = 0; /* single inflight r2t supported */ 12103f2304f8SSagi Grimberg icreq->hpda = 0; /* no alignment constraint */ 12113f2304f8SSagi Grimberg if (queue->hdr_digest) 12123f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_HDR_DIGEST_ENABLE; 12133f2304f8SSagi Grimberg if (queue->data_digest) 12143f2304f8SSagi Grimberg icreq->digest |= NVME_TCP_DATA_DIGEST_ENABLE; 12153f2304f8SSagi Grimberg 12163f2304f8SSagi Grimberg iov.iov_base = icreq; 12173f2304f8SSagi Grimberg iov.iov_len = sizeof(*icreq); 12183f2304f8SSagi Grimberg ret = kernel_sendmsg(queue->sock, &msg, &iov, 1, iov.iov_len); 12193f2304f8SSagi Grimberg if (ret < 0) 12203f2304f8SSagi Grimberg goto free_icresp; 12213f2304f8SSagi Grimberg 12223f2304f8SSagi Grimberg memset(&msg, 0, sizeof(msg)); 12233f2304f8SSagi Grimberg iov.iov_base = icresp; 12243f2304f8SSagi Grimberg iov.iov_len = sizeof(*icresp); 12253f2304f8SSagi Grimberg ret = kernel_recvmsg(queue->sock, &msg, &iov, 1, 12263f2304f8SSagi Grimberg iov.iov_len, msg.msg_flags); 12273f2304f8SSagi Grimberg if (ret < 0) 12283f2304f8SSagi Grimberg goto free_icresp; 12293f2304f8SSagi Grimberg 12303f2304f8SSagi Grimberg ret = -EINVAL; 12313f2304f8SSagi Grimberg if (icresp->hdr.type != nvme_tcp_icresp) { 12323f2304f8SSagi Grimberg pr_err("queue %d: bad type returned %d\n", 12333f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.type); 12343f2304f8SSagi Grimberg goto free_icresp; 12353f2304f8SSagi Grimberg } 12363f2304f8SSagi Grimberg 12373f2304f8SSagi Grimberg if (le32_to_cpu(icresp->hdr.plen) != sizeof(*icresp)) { 12383f2304f8SSagi Grimberg pr_err("queue %d: bad pdu length returned %d\n", 12393f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->hdr.plen); 12403f2304f8SSagi Grimberg goto free_icresp; 12413f2304f8SSagi Grimberg } 12423f2304f8SSagi Grimberg 12433f2304f8SSagi Grimberg if (icresp->pfv != NVME_TCP_PFV_1_0) { 12443f2304f8SSagi Grimberg pr_err("queue %d: bad pfv returned %d\n", 12453f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->pfv); 12463f2304f8SSagi Grimberg goto free_icresp; 12473f2304f8SSagi Grimberg } 12483f2304f8SSagi Grimberg 12493f2304f8SSagi Grimberg ctrl_ddgst = !!(icresp->digest & NVME_TCP_DATA_DIGEST_ENABLE); 12503f2304f8SSagi Grimberg if ((queue->data_digest && !ctrl_ddgst) || 12513f2304f8SSagi Grimberg (!queue->data_digest && ctrl_ddgst)) { 12523f2304f8SSagi Grimberg pr_err("queue %d: data digest mismatch host: %s ctrl: %s\n", 12533f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12543f2304f8SSagi Grimberg queue->data_digest ? "enabled" : "disabled", 12553f2304f8SSagi Grimberg ctrl_ddgst ? "enabled" : "disabled"); 12563f2304f8SSagi Grimberg goto free_icresp; 12573f2304f8SSagi Grimberg } 12583f2304f8SSagi Grimberg 12593f2304f8SSagi Grimberg ctrl_hdgst = !!(icresp->digest & NVME_TCP_HDR_DIGEST_ENABLE); 12603f2304f8SSagi Grimberg if ((queue->hdr_digest && !ctrl_hdgst) || 12613f2304f8SSagi Grimberg (!queue->hdr_digest && ctrl_hdgst)) { 12623f2304f8SSagi Grimberg pr_err("queue %d: header digest mismatch host: %s ctrl: %s\n", 12633f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), 12643f2304f8SSagi Grimberg queue->hdr_digest ? "enabled" : "disabled", 12653f2304f8SSagi Grimberg ctrl_hdgst ? "enabled" : "disabled"); 12663f2304f8SSagi Grimberg goto free_icresp; 12673f2304f8SSagi Grimberg } 12683f2304f8SSagi Grimberg 12693f2304f8SSagi Grimberg if (icresp->cpda != 0) { 12703f2304f8SSagi Grimberg pr_err("queue %d: unsupported cpda returned %d\n", 12713f2304f8SSagi Grimberg nvme_tcp_queue_id(queue), icresp->cpda); 12723f2304f8SSagi Grimberg goto free_icresp; 12733f2304f8SSagi Grimberg } 12743f2304f8SSagi Grimberg 12753f2304f8SSagi Grimberg ret = 0; 12763f2304f8SSagi Grimberg free_icresp: 12773f2304f8SSagi Grimberg kfree(icresp); 12783f2304f8SSagi Grimberg free_icreq: 12793f2304f8SSagi Grimberg kfree(icreq); 12803f2304f8SSagi Grimberg return ret; 12813f2304f8SSagi Grimberg } 12823f2304f8SSagi Grimberg 128340510a63SSagi Grimberg static bool nvme_tcp_admin_queue(struct nvme_tcp_queue *queue) 128440510a63SSagi Grimberg { 128540510a63SSagi Grimberg return nvme_tcp_queue_id(queue) == 0; 128640510a63SSagi Grimberg } 128740510a63SSagi Grimberg 128840510a63SSagi Grimberg static bool nvme_tcp_default_queue(struct nvme_tcp_queue *queue) 128940510a63SSagi Grimberg { 129040510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 129140510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 129240510a63SSagi Grimberg 129340510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 129440510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT]; 129540510a63SSagi Grimberg } 129640510a63SSagi Grimberg 129740510a63SSagi Grimberg static bool nvme_tcp_read_queue(struct nvme_tcp_queue *queue) 129840510a63SSagi Grimberg { 129940510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 130040510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 130140510a63SSagi Grimberg 130240510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 130340510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 130440510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 130540510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 130640510a63SSagi Grimberg } 130740510a63SSagi Grimberg 130840510a63SSagi Grimberg static bool nvme_tcp_poll_queue(struct nvme_tcp_queue *queue) 130940510a63SSagi Grimberg { 131040510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 131140510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 131240510a63SSagi Grimberg 131340510a63SSagi Grimberg return !nvme_tcp_admin_queue(queue) && 131440510a63SSagi Grimberg !nvme_tcp_default_queue(queue) && 131540510a63SSagi Grimberg !nvme_tcp_read_queue(queue) && 131640510a63SSagi Grimberg qid < 1 + ctrl->io_queues[HCTX_TYPE_DEFAULT] + 131740510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] + 131840510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 131940510a63SSagi Grimberg } 132040510a63SSagi Grimberg 132140510a63SSagi Grimberg static void nvme_tcp_set_queue_io_cpu(struct nvme_tcp_queue *queue) 132240510a63SSagi Grimberg { 132340510a63SSagi Grimberg struct nvme_tcp_ctrl *ctrl = queue->ctrl; 132440510a63SSagi Grimberg int qid = nvme_tcp_queue_id(queue); 132540510a63SSagi Grimberg int n = 0; 132640510a63SSagi Grimberg 132740510a63SSagi Grimberg if (nvme_tcp_default_queue(queue)) 132840510a63SSagi Grimberg n = qid - 1; 132940510a63SSagi Grimberg else if (nvme_tcp_read_queue(queue)) 133040510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 1; 133140510a63SSagi Grimberg else if (nvme_tcp_poll_queue(queue)) 133240510a63SSagi Grimberg n = qid - ctrl->io_queues[HCTX_TYPE_DEFAULT] - 133340510a63SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] - 1; 133440510a63SSagi Grimberg queue->io_cpu = cpumask_next_wrap(n - 1, cpu_online_mask, -1, false); 133540510a63SSagi Grimberg } 133640510a63SSagi Grimberg 13373f2304f8SSagi Grimberg static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, 13383f2304f8SSagi Grimberg int qid, size_t queue_size) 13393f2304f8SSagi Grimberg { 13403f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 13413f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 13423f2304f8SSagi Grimberg struct linger sol = { .l_onoff = 1, .l_linger = 0 }; 134340510a63SSagi Grimberg int ret, opt, rcv_pdu_size; 13443f2304f8SSagi Grimberg 13453f2304f8SSagi Grimberg queue->ctrl = ctrl; 13463f2304f8SSagi Grimberg INIT_LIST_HEAD(&queue->send_list); 13473f2304f8SSagi Grimberg spin_lock_init(&queue->lock); 1348db5ad6b7SSagi Grimberg mutex_init(&queue->send_mutex); 13493f2304f8SSagi Grimberg INIT_WORK(&queue->io_work, nvme_tcp_io_work); 13503f2304f8SSagi Grimberg queue->queue_size = queue_size; 13513f2304f8SSagi Grimberg 13523f2304f8SSagi Grimberg if (qid > 0) 13539924b030SIsrael Rukshin queue->cmnd_capsule_len = nctrl->ioccsz * 16; 13543f2304f8SSagi Grimberg else 13553f2304f8SSagi Grimberg queue->cmnd_capsule_len = sizeof(struct nvme_command) + 13563f2304f8SSagi Grimberg NVME_TCP_ADMIN_CCSZ; 13573f2304f8SSagi Grimberg 13583f2304f8SSagi Grimberg ret = sock_create(ctrl->addr.ss_family, SOCK_STREAM, 13593f2304f8SSagi Grimberg IPPROTO_TCP, &queue->sock); 13603f2304f8SSagi Grimberg if (ret) { 13619924b030SIsrael Rukshin dev_err(nctrl->device, 13623f2304f8SSagi Grimberg "failed to create socket: %d\n", ret); 13633f2304f8SSagi Grimberg return ret; 13643f2304f8SSagi Grimberg } 13653f2304f8SSagi Grimberg 13663f2304f8SSagi Grimberg /* Single syn retry */ 13673f2304f8SSagi Grimberg opt = 1; 13683f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, IPPROTO_TCP, TCP_SYNCNT, 13693f2304f8SSagi Grimberg (char *)&opt, sizeof(opt)); 13703f2304f8SSagi Grimberg if (ret) { 13719924b030SIsrael Rukshin dev_err(nctrl->device, 13723f2304f8SSagi Grimberg "failed to set TCP_SYNCNT sock opt %d\n", ret); 13733f2304f8SSagi Grimberg goto err_sock; 13743f2304f8SSagi Grimberg } 13753f2304f8SSagi Grimberg 13763f2304f8SSagi Grimberg /* Set TCP no delay */ 13773f2304f8SSagi Grimberg opt = 1; 13783f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, IPPROTO_TCP, 13793f2304f8SSagi Grimberg TCP_NODELAY, (char *)&opt, sizeof(opt)); 13803f2304f8SSagi Grimberg if (ret) { 13819924b030SIsrael Rukshin dev_err(nctrl->device, 13823f2304f8SSagi Grimberg "failed to set TCP_NODELAY sock opt %d\n", ret); 13833f2304f8SSagi Grimberg goto err_sock; 13843f2304f8SSagi Grimberg } 13853f2304f8SSagi Grimberg 13863f2304f8SSagi Grimberg /* 13873f2304f8SSagi Grimberg * Cleanup whatever is sitting in the TCP transmit queue on socket 13883f2304f8SSagi Grimberg * close. This is done to prevent stale data from being sent should 13893f2304f8SSagi Grimberg * the network connection be restored before TCP times out. 13903f2304f8SSagi Grimberg */ 13913f2304f8SSagi Grimberg ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_LINGER, 13923f2304f8SSagi Grimberg (char *)&sol, sizeof(sol)); 13933f2304f8SSagi Grimberg if (ret) { 13949924b030SIsrael Rukshin dev_err(nctrl->device, 13953f2304f8SSagi Grimberg "failed to set SO_LINGER sock opt %d\n", ret); 13963f2304f8SSagi Grimberg goto err_sock; 13973f2304f8SSagi Grimberg } 13983f2304f8SSagi Grimberg 13999912ade3SWunderlich, Mark if (so_priority > 0) { 14009912ade3SWunderlich, Mark ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY, 14019912ade3SWunderlich, Mark (char *)&so_priority, sizeof(so_priority)); 14029912ade3SWunderlich, Mark if (ret) { 14039912ade3SWunderlich, Mark dev_err(ctrl->ctrl.device, 14049912ade3SWunderlich, Mark "failed to set SO_PRIORITY sock opt, ret %d\n", 14059912ade3SWunderlich, Mark ret); 14069912ade3SWunderlich, Mark goto err_sock; 14079912ade3SWunderlich, Mark } 14089912ade3SWunderlich, Mark } 14099912ade3SWunderlich, Mark 1410bb13985dSIsrael Rukshin /* Set socket type of service */ 1411bb13985dSIsrael Rukshin if (nctrl->opts->tos >= 0) { 1412bb13985dSIsrael Rukshin opt = nctrl->opts->tos; 1413bb13985dSIsrael Rukshin ret = kernel_setsockopt(queue->sock, SOL_IP, IP_TOS, 1414bb13985dSIsrael Rukshin (char *)&opt, sizeof(opt)); 1415bb13985dSIsrael Rukshin if (ret) { 1416bb13985dSIsrael Rukshin dev_err(nctrl->device, 1417bb13985dSIsrael Rukshin "failed to set IP_TOS sock opt %d\n", ret); 1418bb13985dSIsrael Rukshin goto err_sock; 1419bb13985dSIsrael Rukshin } 1420bb13985dSIsrael Rukshin } 1421bb13985dSIsrael Rukshin 14223f2304f8SSagi Grimberg queue->sock->sk->sk_allocation = GFP_ATOMIC; 142340510a63SSagi Grimberg nvme_tcp_set_queue_io_cpu(queue); 14243f2304f8SSagi Grimberg queue->request = NULL; 14253f2304f8SSagi Grimberg queue->data_remaining = 0; 14263f2304f8SSagi Grimberg queue->ddgst_remaining = 0; 14273f2304f8SSagi Grimberg queue->pdu_remaining = 0; 14283f2304f8SSagi Grimberg queue->pdu_offset = 0; 14293f2304f8SSagi Grimberg sk_set_memalloc(queue->sock->sk); 14303f2304f8SSagi Grimberg 14319924b030SIsrael Rukshin if (nctrl->opts->mask & NVMF_OPT_HOST_TRADDR) { 14323f2304f8SSagi Grimberg ret = kernel_bind(queue->sock, (struct sockaddr *)&ctrl->src_addr, 14333f2304f8SSagi Grimberg sizeof(ctrl->src_addr)); 14343f2304f8SSagi Grimberg if (ret) { 14359924b030SIsrael Rukshin dev_err(nctrl->device, 14363f2304f8SSagi Grimberg "failed to bind queue %d socket %d\n", 14373f2304f8SSagi Grimberg qid, ret); 14383f2304f8SSagi Grimberg goto err_sock; 14393f2304f8SSagi Grimberg } 14403f2304f8SSagi Grimberg } 14413f2304f8SSagi Grimberg 14423f2304f8SSagi Grimberg queue->hdr_digest = nctrl->opts->hdr_digest; 14433f2304f8SSagi Grimberg queue->data_digest = nctrl->opts->data_digest; 14443f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) { 14453f2304f8SSagi Grimberg ret = nvme_tcp_alloc_crypto(queue); 14463f2304f8SSagi Grimberg if (ret) { 14479924b030SIsrael Rukshin dev_err(nctrl->device, 14483f2304f8SSagi Grimberg "failed to allocate queue %d crypto\n", qid); 14493f2304f8SSagi Grimberg goto err_sock; 14503f2304f8SSagi Grimberg } 14513f2304f8SSagi Grimberg } 14523f2304f8SSagi Grimberg 14533f2304f8SSagi Grimberg rcv_pdu_size = sizeof(struct nvme_tcp_rsp_pdu) + 14543f2304f8SSagi Grimberg nvme_tcp_hdgst_len(queue); 14553f2304f8SSagi Grimberg queue->pdu = kmalloc(rcv_pdu_size, GFP_KERNEL); 14563f2304f8SSagi Grimberg if (!queue->pdu) { 14573f2304f8SSagi Grimberg ret = -ENOMEM; 14583f2304f8SSagi Grimberg goto err_crypto; 14593f2304f8SSagi Grimberg } 14603f2304f8SSagi Grimberg 14619924b030SIsrael Rukshin dev_dbg(nctrl->device, "connecting queue %d\n", 14623f2304f8SSagi Grimberg nvme_tcp_queue_id(queue)); 14633f2304f8SSagi Grimberg 14643f2304f8SSagi Grimberg ret = kernel_connect(queue->sock, (struct sockaddr *)&ctrl->addr, 14653f2304f8SSagi Grimberg sizeof(ctrl->addr), 0); 14663f2304f8SSagi Grimberg if (ret) { 14679924b030SIsrael Rukshin dev_err(nctrl->device, 14683f2304f8SSagi Grimberg "failed to connect socket: %d\n", ret); 14693f2304f8SSagi Grimberg goto err_rcv_pdu; 14703f2304f8SSagi Grimberg } 14713f2304f8SSagi Grimberg 14723f2304f8SSagi Grimberg ret = nvme_tcp_init_connection(queue); 14733f2304f8SSagi Grimberg if (ret) 14743f2304f8SSagi Grimberg goto err_init_connect; 14753f2304f8SSagi Grimberg 14763f2304f8SSagi Grimberg queue->rd_enabled = true; 14773f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_ALLOCATED, &queue->flags); 14783f2304f8SSagi Grimberg nvme_tcp_init_recv_ctx(queue); 14793f2304f8SSagi Grimberg 14803f2304f8SSagi Grimberg write_lock_bh(&queue->sock->sk->sk_callback_lock); 14813f2304f8SSagi Grimberg queue->sock->sk->sk_user_data = queue; 14823f2304f8SSagi Grimberg queue->state_change = queue->sock->sk->sk_state_change; 14833f2304f8SSagi Grimberg queue->data_ready = queue->sock->sk->sk_data_ready; 14843f2304f8SSagi Grimberg queue->write_space = queue->sock->sk->sk_write_space; 14853f2304f8SSagi Grimberg queue->sock->sk->sk_data_ready = nvme_tcp_data_ready; 14863f2304f8SSagi Grimberg queue->sock->sk->sk_state_change = nvme_tcp_state_change; 14873f2304f8SSagi Grimberg queue->sock->sk->sk_write_space = nvme_tcp_write_space; 1488ac1c4e18SSebastian Andrzej Siewior #ifdef CONFIG_NET_RX_BUSY_POLL 14891a9460ceSSagi Grimberg queue->sock->sk->sk_ll_usec = 1; 1490ac1c4e18SSebastian Andrzej Siewior #endif 14913f2304f8SSagi Grimberg write_unlock_bh(&queue->sock->sk->sk_callback_lock); 14923f2304f8SSagi Grimberg 14933f2304f8SSagi Grimberg return 0; 14943f2304f8SSagi Grimberg 14953f2304f8SSagi Grimberg err_init_connect: 14963f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 14973f2304f8SSagi Grimberg err_rcv_pdu: 14983f2304f8SSagi Grimberg kfree(queue->pdu); 14993f2304f8SSagi Grimberg err_crypto: 15003f2304f8SSagi Grimberg if (queue->hdr_digest || queue->data_digest) 15013f2304f8SSagi Grimberg nvme_tcp_free_crypto(queue); 15023f2304f8SSagi Grimberg err_sock: 15033f2304f8SSagi Grimberg sock_release(queue->sock); 15043f2304f8SSagi Grimberg queue->sock = NULL; 15053f2304f8SSagi Grimberg return ret; 15063f2304f8SSagi Grimberg } 15073f2304f8SSagi Grimberg 15083f2304f8SSagi Grimberg static void nvme_tcp_restore_sock_calls(struct nvme_tcp_queue *queue) 15093f2304f8SSagi Grimberg { 15103f2304f8SSagi Grimberg struct socket *sock = queue->sock; 15113f2304f8SSagi Grimberg 15123f2304f8SSagi Grimberg write_lock_bh(&sock->sk->sk_callback_lock); 15133f2304f8SSagi Grimberg sock->sk->sk_user_data = NULL; 15143f2304f8SSagi Grimberg sock->sk->sk_data_ready = queue->data_ready; 15153f2304f8SSagi Grimberg sock->sk->sk_state_change = queue->state_change; 15163f2304f8SSagi Grimberg sock->sk->sk_write_space = queue->write_space; 15173f2304f8SSagi Grimberg write_unlock_bh(&sock->sk->sk_callback_lock); 15183f2304f8SSagi Grimberg } 15193f2304f8SSagi Grimberg 15203f2304f8SSagi Grimberg static void __nvme_tcp_stop_queue(struct nvme_tcp_queue *queue) 15213f2304f8SSagi Grimberg { 15223f2304f8SSagi Grimberg kernel_sock_shutdown(queue->sock, SHUT_RDWR); 15233f2304f8SSagi Grimberg nvme_tcp_restore_sock_calls(queue); 15243f2304f8SSagi Grimberg cancel_work_sync(&queue->io_work); 15253f2304f8SSagi Grimberg } 15263f2304f8SSagi Grimberg 15273f2304f8SSagi Grimberg static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid) 15283f2304f8SSagi Grimberg { 15293f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15303f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[qid]; 15313f2304f8SSagi Grimberg 15323f2304f8SSagi Grimberg if (!test_and_clear_bit(NVME_TCP_Q_LIVE, &queue->flags)) 15333f2304f8SSagi Grimberg return; 15343f2304f8SSagi Grimberg 15353f2304f8SSagi Grimberg __nvme_tcp_stop_queue(queue); 15363f2304f8SSagi Grimberg } 15373f2304f8SSagi Grimberg 15383f2304f8SSagi Grimberg static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx) 15393f2304f8SSagi Grimberg { 15403f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15413f2304f8SSagi Grimberg int ret; 15423f2304f8SSagi Grimberg 15433f2304f8SSagi Grimberg if (idx) 154426c68227SSagi Grimberg ret = nvmf_connect_io_queue(nctrl, idx, false); 15453f2304f8SSagi Grimberg else 15463f2304f8SSagi Grimberg ret = nvmf_connect_admin_queue(nctrl); 15473f2304f8SSagi Grimberg 15483f2304f8SSagi Grimberg if (!ret) { 15493f2304f8SSagi Grimberg set_bit(NVME_TCP_Q_LIVE, &ctrl->queues[idx].flags); 15503f2304f8SSagi Grimberg } else { 1551f34e2589SSagi Grimberg if (test_bit(NVME_TCP_Q_ALLOCATED, &ctrl->queues[idx].flags)) 15523f2304f8SSagi Grimberg __nvme_tcp_stop_queue(&ctrl->queues[idx]); 15533f2304f8SSagi Grimberg dev_err(nctrl->device, 15543f2304f8SSagi Grimberg "failed to connect queue: %d ret=%d\n", idx, ret); 15553f2304f8SSagi Grimberg } 15563f2304f8SSagi Grimberg return ret; 15573f2304f8SSagi Grimberg } 15583f2304f8SSagi Grimberg 15593f2304f8SSagi Grimberg static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl, 15603f2304f8SSagi Grimberg bool admin) 15613f2304f8SSagi Grimberg { 15623f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 15633f2304f8SSagi Grimberg struct blk_mq_tag_set *set; 15643f2304f8SSagi Grimberg int ret; 15653f2304f8SSagi Grimberg 15663f2304f8SSagi Grimberg if (admin) { 15673f2304f8SSagi Grimberg set = &ctrl->admin_tag_set; 15683f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15693f2304f8SSagi Grimberg set->ops = &nvme_tcp_admin_mq_ops; 15703f2304f8SSagi Grimberg set->queue_depth = NVME_AQ_MQ_TAG_DEPTH; 15713f2304f8SSagi Grimberg set->reserved_tags = 2; /* connect + keep-alive */ 15723f2304f8SSagi Grimberg set->numa_node = NUMA_NO_NODE; 1573db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_BLOCKING; 15743f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15753f2304f8SSagi Grimberg set->driver_data = ctrl; 15763f2304f8SSagi Grimberg set->nr_hw_queues = 1; 15773f2304f8SSagi Grimberg set->timeout = ADMIN_TIMEOUT; 15783f2304f8SSagi Grimberg } else { 15793f2304f8SSagi Grimberg set = &ctrl->tag_set; 15803f2304f8SSagi Grimberg memset(set, 0, sizeof(*set)); 15813f2304f8SSagi Grimberg set->ops = &nvme_tcp_mq_ops; 15823f2304f8SSagi Grimberg set->queue_depth = nctrl->sqsize + 1; 15833f2304f8SSagi Grimberg set->reserved_tags = 1; /* fabric connect */ 15843f2304f8SSagi Grimberg set->numa_node = NUMA_NO_NODE; 1585db5ad6b7SSagi Grimberg set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; 15863f2304f8SSagi Grimberg set->cmd_size = sizeof(struct nvme_tcp_request); 15873f2304f8SSagi Grimberg set->driver_data = ctrl; 15883f2304f8SSagi Grimberg set->nr_hw_queues = nctrl->queue_count - 1; 15893f2304f8SSagi Grimberg set->timeout = NVME_IO_TIMEOUT; 15901a9460ceSSagi Grimberg set->nr_maps = nctrl->opts->nr_poll_queues ? HCTX_MAX_TYPES : 2; 15913f2304f8SSagi Grimberg } 15923f2304f8SSagi Grimberg 15933f2304f8SSagi Grimberg ret = blk_mq_alloc_tag_set(set); 15943f2304f8SSagi Grimberg if (ret) 15953f2304f8SSagi Grimberg return ERR_PTR(ret); 15963f2304f8SSagi Grimberg 15973f2304f8SSagi Grimberg return set; 15983f2304f8SSagi Grimberg } 15993f2304f8SSagi Grimberg 16003f2304f8SSagi Grimberg static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl) 16013f2304f8SSagi Grimberg { 16023f2304f8SSagi Grimberg if (to_tcp_ctrl(ctrl)->async_req.pdu) { 16033f2304f8SSagi Grimberg nvme_tcp_free_async_req(to_tcp_ctrl(ctrl)); 16043f2304f8SSagi Grimberg to_tcp_ctrl(ctrl)->async_req.pdu = NULL; 16053f2304f8SSagi Grimberg } 16063f2304f8SSagi Grimberg 16073f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16083f2304f8SSagi Grimberg } 16093f2304f8SSagi Grimberg 16103f2304f8SSagi Grimberg static void nvme_tcp_free_io_queues(struct nvme_ctrl *ctrl) 16113f2304f8SSagi Grimberg { 16123f2304f8SSagi Grimberg int i; 16133f2304f8SSagi Grimberg 16143f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16153f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16163f2304f8SSagi Grimberg } 16173f2304f8SSagi Grimberg 16183f2304f8SSagi Grimberg static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl) 16193f2304f8SSagi Grimberg { 16203f2304f8SSagi Grimberg int i; 16213f2304f8SSagi Grimberg 16223f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) 16233f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16243f2304f8SSagi Grimberg } 16253f2304f8SSagi Grimberg 16263f2304f8SSagi Grimberg static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl) 16273f2304f8SSagi Grimberg { 16283f2304f8SSagi Grimberg int i, ret = 0; 16293f2304f8SSagi Grimberg 16303f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16313f2304f8SSagi Grimberg ret = nvme_tcp_start_queue(ctrl, i); 16323f2304f8SSagi Grimberg if (ret) 16333f2304f8SSagi Grimberg goto out_stop_queues; 16343f2304f8SSagi Grimberg } 16353f2304f8SSagi Grimberg 16363f2304f8SSagi Grimberg return 0; 16373f2304f8SSagi Grimberg 16383f2304f8SSagi Grimberg out_stop_queues: 16393f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16403f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, i); 16413f2304f8SSagi Grimberg return ret; 16423f2304f8SSagi Grimberg } 16433f2304f8SSagi Grimberg 16443f2304f8SSagi Grimberg static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl) 16453f2304f8SSagi Grimberg { 16463f2304f8SSagi Grimberg int ret; 16473f2304f8SSagi Grimberg 16483f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, 0, NVME_AQ_DEPTH); 16493f2304f8SSagi Grimberg if (ret) 16503f2304f8SSagi Grimberg return ret; 16513f2304f8SSagi Grimberg 16523f2304f8SSagi Grimberg ret = nvme_tcp_alloc_async_req(to_tcp_ctrl(ctrl)); 16533f2304f8SSagi Grimberg if (ret) 16543f2304f8SSagi Grimberg goto out_free_queue; 16553f2304f8SSagi Grimberg 16563f2304f8SSagi Grimberg return 0; 16573f2304f8SSagi Grimberg 16583f2304f8SSagi Grimberg out_free_queue: 16593f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, 0); 16603f2304f8SSagi Grimberg return ret; 16613f2304f8SSagi Grimberg } 16623f2304f8SSagi Grimberg 1663efb973b1SSagi Grimberg static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 16643f2304f8SSagi Grimberg { 16653f2304f8SSagi Grimberg int i, ret; 16663f2304f8SSagi Grimberg 16673f2304f8SSagi Grimberg for (i = 1; i < ctrl->queue_count; i++) { 16683f2304f8SSagi Grimberg ret = nvme_tcp_alloc_queue(ctrl, i, 16693f2304f8SSagi Grimberg ctrl->sqsize + 1); 16703f2304f8SSagi Grimberg if (ret) 16713f2304f8SSagi Grimberg goto out_free_queues; 16723f2304f8SSagi Grimberg } 16733f2304f8SSagi Grimberg 16743f2304f8SSagi Grimberg return 0; 16753f2304f8SSagi Grimberg 16763f2304f8SSagi Grimberg out_free_queues: 16773f2304f8SSagi Grimberg for (i--; i >= 1; i--) 16783f2304f8SSagi Grimberg nvme_tcp_free_queue(ctrl, i); 16793f2304f8SSagi Grimberg 16803f2304f8SSagi Grimberg return ret; 16813f2304f8SSagi Grimberg } 16823f2304f8SSagi Grimberg 16833f2304f8SSagi Grimberg static unsigned int nvme_tcp_nr_io_queues(struct nvme_ctrl *ctrl) 16843f2304f8SSagi Grimberg { 1685873946f4SSagi Grimberg unsigned int nr_io_queues; 1686873946f4SSagi Grimberg 1687873946f4SSagi Grimberg nr_io_queues = min(ctrl->opts->nr_io_queues, num_online_cpus()); 1688873946f4SSagi Grimberg nr_io_queues += min(ctrl->opts->nr_write_queues, num_online_cpus()); 16891a9460ceSSagi Grimberg nr_io_queues += min(ctrl->opts->nr_poll_queues, num_online_cpus()); 1690873946f4SSagi Grimberg 1691873946f4SSagi Grimberg return nr_io_queues; 16923f2304f8SSagi Grimberg } 16933f2304f8SSagi Grimberg 169464861993SSagi Grimberg static void nvme_tcp_set_io_queues(struct nvme_ctrl *nctrl, 169564861993SSagi Grimberg unsigned int nr_io_queues) 169664861993SSagi Grimberg { 169764861993SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 169864861993SSagi Grimberg struct nvmf_ctrl_options *opts = nctrl->opts; 169964861993SSagi Grimberg 170064861993SSagi Grimberg if (opts->nr_write_queues && opts->nr_io_queues < nr_io_queues) { 170164861993SSagi Grimberg /* 170264861993SSagi Grimberg * separate read/write queues 170364861993SSagi Grimberg * hand out dedicated default queues only after we have 170464861993SSagi Grimberg * sufficient read queues. 170564861993SSagi Grimberg */ 170664861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ] = opts->nr_io_queues; 170764861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_READ]; 170864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 170964861993SSagi Grimberg min(opts->nr_write_queues, nr_io_queues); 171064861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 171164861993SSagi Grimberg } else { 171264861993SSagi Grimberg /* 171364861993SSagi Grimberg * shared read/write queues 171464861993SSagi Grimberg * either no write queues were requested, or we don't have 171564861993SSagi Grimberg * sufficient queue count to have dedicated default queues. 171664861993SSagi Grimberg */ 171764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] = 171864861993SSagi Grimberg min(opts->nr_io_queues, nr_io_queues); 171964861993SSagi Grimberg nr_io_queues -= ctrl->io_queues[HCTX_TYPE_DEFAULT]; 172064861993SSagi Grimberg } 17211a9460ceSSagi Grimberg 17221a9460ceSSagi Grimberg if (opts->nr_poll_queues && nr_io_queues) { 17231a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 17241a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL] = 17251a9460ceSSagi Grimberg min(opts->nr_poll_queues, nr_io_queues); 17261a9460ceSSagi Grimberg } 172764861993SSagi Grimberg } 172864861993SSagi Grimberg 1729efb973b1SSagi Grimberg static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl) 17303f2304f8SSagi Grimberg { 17313f2304f8SSagi Grimberg unsigned int nr_io_queues; 17323f2304f8SSagi Grimberg int ret; 17333f2304f8SSagi Grimberg 17343f2304f8SSagi Grimberg nr_io_queues = nvme_tcp_nr_io_queues(ctrl); 17353f2304f8SSagi Grimberg ret = nvme_set_queue_count(ctrl, &nr_io_queues); 17363f2304f8SSagi Grimberg if (ret) 17373f2304f8SSagi Grimberg return ret; 17383f2304f8SSagi Grimberg 17393f2304f8SSagi Grimberg ctrl->queue_count = nr_io_queues + 1; 17403f2304f8SSagi Grimberg if (ctrl->queue_count < 2) 17413f2304f8SSagi Grimberg return 0; 17423f2304f8SSagi Grimberg 17433f2304f8SSagi Grimberg dev_info(ctrl->device, 17443f2304f8SSagi Grimberg "creating %d I/O queues.\n", nr_io_queues); 17453f2304f8SSagi Grimberg 174664861993SSagi Grimberg nvme_tcp_set_io_queues(ctrl, nr_io_queues); 174764861993SSagi Grimberg 1748efb973b1SSagi Grimberg return __nvme_tcp_alloc_io_queues(ctrl); 17493f2304f8SSagi Grimberg } 17503f2304f8SSagi Grimberg 17513f2304f8SSagi Grimberg static void nvme_tcp_destroy_io_queues(struct nvme_ctrl *ctrl, bool remove) 17523f2304f8SSagi Grimberg { 17533f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 17543f2304f8SSagi Grimberg if (remove) { 17553f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 17563f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 17573f2304f8SSagi Grimberg } 17583f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 17593f2304f8SSagi Grimberg } 17603f2304f8SSagi Grimberg 17613f2304f8SSagi Grimberg static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) 17623f2304f8SSagi Grimberg { 17633f2304f8SSagi Grimberg int ret; 17643f2304f8SSagi Grimberg 1765efb973b1SSagi Grimberg ret = nvme_tcp_alloc_io_queues(ctrl); 17663f2304f8SSagi Grimberg if (ret) 17673f2304f8SSagi Grimberg return ret; 17683f2304f8SSagi Grimberg 17693f2304f8SSagi Grimberg if (new) { 17703f2304f8SSagi Grimberg ctrl->tagset = nvme_tcp_alloc_tagset(ctrl, false); 17713f2304f8SSagi Grimberg if (IS_ERR(ctrl->tagset)) { 17723f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->tagset); 17733f2304f8SSagi Grimberg goto out_free_io_queues; 17743f2304f8SSagi Grimberg } 17753f2304f8SSagi Grimberg 17763f2304f8SSagi Grimberg ctrl->connect_q = blk_mq_init_queue(ctrl->tagset); 17773f2304f8SSagi Grimberg if (IS_ERR(ctrl->connect_q)) { 17783f2304f8SSagi Grimberg ret = PTR_ERR(ctrl->connect_q); 17793f2304f8SSagi Grimberg goto out_free_tag_set; 17803f2304f8SSagi Grimberg } 17813f2304f8SSagi Grimberg } else { 17823f2304f8SSagi Grimberg blk_mq_update_nr_hw_queues(ctrl->tagset, 17833f2304f8SSagi Grimberg ctrl->queue_count - 1); 17843f2304f8SSagi Grimberg } 17853f2304f8SSagi Grimberg 17863f2304f8SSagi Grimberg ret = nvme_tcp_start_io_queues(ctrl); 17873f2304f8SSagi Grimberg if (ret) 17883f2304f8SSagi Grimberg goto out_cleanup_connect_q; 17893f2304f8SSagi Grimberg 17903f2304f8SSagi Grimberg return 0; 17913f2304f8SSagi Grimberg 17923f2304f8SSagi Grimberg out_cleanup_connect_q: 1793e85037a2SSagi Grimberg if (new) 17943f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->connect_q); 17953f2304f8SSagi Grimberg out_free_tag_set: 17963f2304f8SSagi Grimberg if (new) 17973f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->tagset); 17983f2304f8SSagi Grimberg out_free_io_queues: 17993f2304f8SSagi Grimberg nvme_tcp_free_io_queues(ctrl); 18003f2304f8SSagi Grimberg return ret; 18013f2304f8SSagi Grimberg } 18023f2304f8SSagi Grimberg 18033f2304f8SSagi Grimberg static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove) 18043f2304f8SSagi Grimberg { 18053f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18063f2304f8SSagi Grimberg if (remove) { 18073f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1808e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18093f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 18103f2304f8SSagi Grimberg } 18113f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 18123f2304f8SSagi Grimberg } 18133f2304f8SSagi Grimberg 18143f2304f8SSagi Grimberg static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) 18153f2304f8SSagi Grimberg { 18163f2304f8SSagi Grimberg int error; 18173f2304f8SSagi Grimberg 18183f2304f8SSagi Grimberg error = nvme_tcp_alloc_admin_queue(ctrl); 18193f2304f8SSagi Grimberg if (error) 18203f2304f8SSagi Grimberg return error; 18213f2304f8SSagi Grimberg 18223f2304f8SSagi Grimberg if (new) { 18233f2304f8SSagi Grimberg ctrl->admin_tagset = nvme_tcp_alloc_tagset(ctrl, true); 18243f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_tagset)) { 18253f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_tagset); 18263f2304f8SSagi Grimberg goto out_free_queue; 18273f2304f8SSagi Grimberg } 18283f2304f8SSagi Grimberg 1829e7832cb4SSagi Grimberg ctrl->fabrics_q = blk_mq_init_queue(ctrl->admin_tagset); 1830e7832cb4SSagi Grimberg if (IS_ERR(ctrl->fabrics_q)) { 1831e7832cb4SSagi Grimberg error = PTR_ERR(ctrl->fabrics_q); 1832e7832cb4SSagi Grimberg goto out_free_tagset; 1833e7832cb4SSagi Grimberg } 1834e7832cb4SSagi Grimberg 18353f2304f8SSagi Grimberg ctrl->admin_q = blk_mq_init_queue(ctrl->admin_tagset); 18363f2304f8SSagi Grimberg if (IS_ERR(ctrl->admin_q)) { 18373f2304f8SSagi Grimberg error = PTR_ERR(ctrl->admin_q); 1838e7832cb4SSagi Grimberg goto out_cleanup_fabrics_q; 18393f2304f8SSagi Grimberg } 18403f2304f8SSagi Grimberg } 18413f2304f8SSagi Grimberg 18423f2304f8SSagi Grimberg error = nvme_tcp_start_queue(ctrl, 0); 18433f2304f8SSagi Grimberg if (error) 18443f2304f8SSagi Grimberg goto out_cleanup_queue; 18453f2304f8SSagi Grimberg 1846c0f2f45bSSagi Grimberg error = nvme_enable_ctrl(ctrl); 18473f2304f8SSagi Grimberg if (error) 18483f2304f8SSagi Grimberg goto out_stop_queue; 18493f2304f8SSagi Grimberg 1850e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 1851e7832cb4SSagi Grimberg 18523f2304f8SSagi Grimberg error = nvme_init_identify(ctrl); 18533f2304f8SSagi Grimberg if (error) 18543f2304f8SSagi Grimberg goto out_stop_queue; 18553f2304f8SSagi Grimberg 18563f2304f8SSagi Grimberg return 0; 18573f2304f8SSagi Grimberg 18583f2304f8SSagi Grimberg out_stop_queue: 18593f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 18603f2304f8SSagi Grimberg out_cleanup_queue: 18613f2304f8SSagi Grimberg if (new) 18623f2304f8SSagi Grimberg blk_cleanup_queue(ctrl->admin_q); 1863e7832cb4SSagi Grimberg out_cleanup_fabrics_q: 1864e7832cb4SSagi Grimberg if (new) 1865e7832cb4SSagi Grimberg blk_cleanup_queue(ctrl->fabrics_q); 18663f2304f8SSagi Grimberg out_free_tagset: 18673f2304f8SSagi Grimberg if (new) 18683f2304f8SSagi Grimberg blk_mq_free_tag_set(ctrl->admin_tagset); 18693f2304f8SSagi Grimberg out_free_queue: 18703f2304f8SSagi Grimberg nvme_tcp_free_admin_queue(ctrl); 18713f2304f8SSagi Grimberg return error; 18723f2304f8SSagi Grimberg } 18733f2304f8SSagi Grimberg 18743f2304f8SSagi Grimberg static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, 18753f2304f8SSagi Grimberg bool remove) 18763f2304f8SSagi Grimberg { 18773f2304f8SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 18783f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 1879622b8b68SMing Lei if (ctrl->admin_tagset) { 18807a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->admin_tagset, 18817a425896SSagi Grimberg nvme_cancel_request, ctrl); 1882622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->admin_tagset); 1883622b8b68SMing Lei } 1884e7832cb4SSagi Grimberg if (remove) 18853f2304f8SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 18863f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, remove); 18873f2304f8SSagi Grimberg } 18883f2304f8SSagi Grimberg 18893f2304f8SSagi Grimberg static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl, 18903f2304f8SSagi Grimberg bool remove) 18913f2304f8SSagi Grimberg { 18923f2304f8SSagi Grimberg if (ctrl->queue_count <= 1) 18933f2304f8SSagi Grimberg return; 18943f2304f8SSagi Grimberg nvme_stop_queues(ctrl); 18953f2304f8SSagi Grimberg nvme_tcp_stop_io_queues(ctrl); 1896622b8b68SMing Lei if (ctrl->tagset) { 18977a425896SSagi Grimberg blk_mq_tagset_busy_iter(ctrl->tagset, 18987a425896SSagi Grimberg nvme_cancel_request, ctrl); 1899622b8b68SMing Lei blk_mq_tagset_wait_completed_request(ctrl->tagset); 1900622b8b68SMing Lei } 19013f2304f8SSagi Grimberg if (remove) 19023f2304f8SSagi Grimberg nvme_start_queues(ctrl); 19033f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, remove); 19043f2304f8SSagi Grimberg } 19053f2304f8SSagi Grimberg 19063f2304f8SSagi Grimberg static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl) 19073f2304f8SSagi Grimberg { 19083f2304f8SSagi Grimberg /* If we are resetting/deleting then do nothing */ 19093f2304f8SSagi Grimberg if (ctrl->state != NVME_CTRL_CONNECTING) { 19103f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state == NVME_CTRL_NEW || 19113f2304f8SSagi Grimberg ctrl->state == NVME_CTRL_LIVE); 19123f2304f8SSagi Grimberg return; 19133f2304f8SSagi Grimberg } 19143f2304f8SSagi Grimberg 19153f2304f8SSagi Grimberg if (nvmf_should_reconnect(ctrl)) { 19163f2304f8SSagi Grimberg dev_info(ctrl->device, "Reconnecting in %d seconds...\n", 19173f2304f8SSagi Grimberg ctrl->opts->reconnect_delay); 19183f2304f8SSagi Grimberg queue_delayed_work(nvme_wq, &to_tcp_ctrl(ctrl)->connect_work, 19193f2304f8SSagi Grimberg ctrl->opts->reconnect_delay * HZ); 19203f2304f8SSagi Grimberg } else { 19213f2304f8SSagi Grimberg dev_info(ctrl->device, "Removing controller...\n"); 19223f2304f8SSagi Grimberg nvme_delete_ctrl(ctrl); 19233f2304f8SSagi Grimberg } 19243f2304f8SSagi Grimberg } 19253f2304f8SSagi Grimberg 19263f2304f8SSagi Grimberg static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) 19273f2304f8SSagi Grimberg { 19283f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->opts; 1929312910f4SColin Ian King int ret; 19303f2304f8SSagi Grimberg 19313f2304f8SSagi Grimberg ret = nvme_tcp_configure_admin_queue(ctrl, new); 19323f2304f8SSagi Grimberg if (ret) 19333f2304f8SSagi Grimberg return ret; 19343f2304f8SSagi Grimberg 19353f2304f8SSagi Grimberg if (ctrl->icdoff) { 19363f2304f8SSagi Grimberg dev_err(ctrl->device, "icdoff is not supported!\n"); 19373f2304f8SSagi Grimberg goto destroy_admin; 19383f2304f8SSagi Grimberg } 19393f2304f8SSagi Grimberg 19403f2304f8SSagi Grimberg if (opts->queue_size > ctrl->sqsize + 1) 19413f2304f8SSagi Grimberg dev_warn(ctrl->device, 19423f2304f8SSagi Grimberg "queue_size %zu > ctrl sqsize %u, clamping down\n", 19433f2304f8SSagi Grimberg opts->queue_size, ctrl->sqsize + 1); 19443f2304f8SSagi Grimberg 19453f2304f8SSagi Grimberg if (ctrl->sqsize + 1 > ctrl->maxcmd) { 19463f2304f8SSagi Grimberg dev_warn(ctrl->device, 19473f2304f8SSagi Grimberg "sqsize %u > ctrl maxcmd %u, clamping down\n", 19483f2304f8SSagi Grimberg ctrl->sqsize + 1, ctrl->maxcmd); 19493f2304f8SSagi Grimberg ctrl->sqsize = ctrl->maxcmd - 1; 19503f2304f8SSagi Grimberg } 19513f2304f8SSagi Grimberg 19523f2304f8SSagi Grimberg if (ctrl->queue_count > 1) { 19533f2304f8SSagi Grimberg ret = nvme_tcp_configure_io_queues(ctrl, new); 19543f2304f8SSagi Grimberg if (ret) 19553f2304f8SSagi Grimberg goto destroy_admin; 19563f2304f8SSagi Grimberg } 19573f2304f8SSagi Grimberg 19583f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) { 1959bea54ef5SIsrael Rukshin /* 1960bea54ef5SIsrael Rukshin * state change failure is ok if we're in DELETING state, 1961bea54ef5SIsrael Rukshin * unless we're during creation of a new controller to 1962bea54ef5SIsrael Rukshin * avoid races with teardown flow. 1963bea54ef5SIsrael Rukshin */ 19643f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 1965bea54ef5SIsrael Rukshin WARN_ON_ONCE(new); 19663f2304f8SSagi Grimberg ret = -EINVAL; 19673f2304f8SSagi Grimberg goto destroy_io; 19683f2304f8SSagi Grimberg } 19693f2304f8SSagi Grimberg 19703f2304f8SSagi Grimberg nvme_start_ctrl(ctrl); 19713f2304f8SSagi Grimberg return 0; 19723f2304f8SSagi Grimberg 19733f2304f8SSagi Grimberg destroy_io: 19743f2304f8SSagi Grimberg if (ctrl->queue_count > 1) 19753f2304f8SSagi Grimberg nvme_tcp_destroy_io_queues(ctrl, new); 19763f2304f8SSagi Grimberg destroy_admin: 19773f2304f8SSagi Grimberg nvme_tcp_stop_queue(ctrl, 0); 19783f2304f8SSagi Grimberg nvme_tcp_destroy_admin_queue(ctrl, new); 19793f2304f8SSagi Grimberg return ret; 19803f2304f8SSagi Grimberg } 19813f2304f8SSagi Grimberg 19823f2304f8SSagi Grimberg static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work) 19833f2304f8SSagi Grimberg { 19843f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(to_delayed_work(work), 19853f2304f8SSagi Grimberg struct nvme_tcp_ctrl, connect_work); 19863f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 19873f2304f8SSagi Grimberg 19883f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 19893f2304f8SSagi Grimberg 19903f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 19913f2304f8SSagi Grimberg goto requeue; 19923f2304f8SSagi Grimberg 199356a77d26SColin Ian King dev_info(ctrl->device, "Successfully reconnected (%d attempt)\n", 19943f2304f8SSagi Grimberg ctrl->nr_reconnects); 19953f2304f8SSagi Grimberg 19963f2304f8SSagi Grimberg ctrl->nr_reconnects = 0; 19973f2304f8SSagi Grimberg 19983f2304f8SSagi Grimberg return; 19993f2304f8SSagi Grimberg 20003f2304f8SSagi Grimberg requeue: 20013f2304f8SSagi Grimberg dev_info(ctrl->device, "Failed reconnect attempt %d\n", 20023f2304f8SSagi Grimberg ctrl->nr_reconnects); 20033f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20043f2304f8SSagi Grimberg } 20053f2304f8SSagi Grimberg 20063f2304f8SSagi Grimberg static void nvme_tcp_error_recovery_work(struct work_struct *work) 20073f2304f8SSagi Grimberg { 20083f2304f8SSagi Grimberg struct nvme_tcp_ctrl *tcp_ctrl = container_of(work, 20093f2304f8SSagi Grimberg struct nvme_tcp_ctrl, err_work); 20103f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = &tcp_ctrl->ctrl; 20113f2304f8SSagi Grimberg 20123f2304f8SSagi Grimberg nvme_stop_keep_alive(ctrl); 20133f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, false); 20143f2304f8SSagi Grimberg /* unquiesce to fail fast pending requests */ 20153f2304f8SSagi Grimberg nvme_start_queues(ctrl); 20163f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, false); 2017e7832cb4SSagi Grimberg blk_mq_unquiesce_queue(ctrl->admin_q); 20183f2304f8SSagi Grimberg 20193f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 20203f2304f8SSagi Grimberg /* state change failure is ok if we're in DELETING state */ 20213f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 20223f2304f8SSagi Grimberg return; 20233f2304f8SSagi Grimberg } 20243f2304f8SSagi Grimberg 20253f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20263f2304f8SSagi Grimberg } 20273f2304f8SSagi Grimberg 20283f2304f8SSagi Grimberg static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown) 20293f2304f8SSagi Grimberg { 2030794a4cb3SSagi Grimberg cancel_work_sync(&to_tcp_ctrl(ctrl)->err_work); 2031794a4cb3SSagi Grimberg cancel_delayed_work_sync(&to_tcp_ctrl(ctrl)->connect_work); 2032794a4cb3SSagi Grimberg 20333f2304f8SSagi Grimberg nvme_tcp_teardown_io_queues(ctrl, shutdown); 2034e7832cb4SSagi Grimberg blk_mq_quiesce_queue(ctrl->admin_q); 20353f2304f8SSagi Grimberg if (shutdown) 20363f2304f8SSagi Grimberg nvme_shutdown_ctrl(ctrl); 20373f2304f8SSagi Grimberg else 2038b5b05048SSagi Grimberg nvme_disable_ctrl(ctrl); 20393f2304f8SSagi Grimberg nvme_tcp_teardown_admin_queue(ctrl, shutdown); 20403f2304f8SSagi Grimberg } 20413f2304f8SSagi Grimberg 20423f2304f8SSagi Grimberg static void nvme_tcp_delete_ctrl(struct nvme_ctrl *ctrl) 20433f2304f8SSagi Grimberg { 20443f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, true); 20453f2304f8SSagi Grimberg } 20463f2304f8SSagi Grimberg 20473f2304f8SSagi Grimberg static void nvme_reset_ctrl_work(struct work_struct *work) 20483f2304f8SSagi Grimberg { 20493f2304f8SSagi Grimberg struct nvme_ctrl *ctrl = 20503f2304f8SSagi Grimberg container_of(work, struct nvme_ctrl, reset_work); 20513f2304f8SSagi Grimberg 20523f2304f8SSagi Grimberg nvme_stop_ctrl(ctrl); 20533f2304f8SSagi Grimberg nvme_tcp_teardown_ctrl(ctrl, false); 20543f2304f8SSagi Grimberg 20553f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { 20563f2304f8SSagi Grimberg /* state change failure is ok if we're in DELETING state */ 20573f2304f8SSagi Grimberg WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); 20583f2304f8SSagi Grimberg return; 20593f2304f8SSagi Grimberg } 20603f2304f8SSagi Grimberg 20613f2304f8SSagi Grimberg if (nvme_tcp_setup_ctrl(ctrl, false)) 20623f2304f8SSagi Grimberg goto out_fail; 20633f2304f8SSagi Grimberg 20643f2304f8SSagi Grimberg return; 20653f2304f8SSagi Grimberg 20663f2304f8SSagi Grimberg out_fail: 20673f2304f8SSagi Grimberg ++ctrl->nr_reconnects; 20683f2304f8SSagi Grimberg nvme_tcp_reconnect_or_remove(ctrl); 20693f2304f8SSagi Grimberg } 20703f2304f8SSagi Grimberg 20713f2304f8SSagi Grimberg static void nvme_tcp_free_ctrl(struct nvme_ctrl *nctrl) 20723f2304f8SSagi Grimberg { 20733f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(nctrl); 20743f2304f8SSagi Grimberg 20753f2304f8SSagi Grimberg if (list_empty(&ctrl->list)) 20763f2304f8SSagi Grimberg goto free_ctrl; 20773f2304f8SSagi Grimberg 20783f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 20793f2304f8SSagi Grimberg list_del(&ctrl->list); 20803f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 20813f2304f8SSagi Grimberg 20823f2304f8SSagi Grimberg nvmf_free_options(nctrl->opts); 20833f2304f8SSagi Grimberg free_ctrl: 20843f2304f8SSagi Grimberg kfree(ctrl->queues); 20853f2304f8SSagi Grimberg kfree(ctrl); 20863f2304f8SSagi Grimberg } 20873f2304f8SSagi Grimberg 20883f2304f8SSagi Grimberg static void nvme_tcp_set_sg_null(struct nvme_command *c) 20893f2304f8SSagi Grimberg { 20903f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 20913f2304f8SSagi Grimberg 20923f2304f8SSagi Grimberg sg->addr = 0; 20933f2304f8SSagi Grimberg sg->length = 0; 20943f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 20953f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 20963f2304f8SSagi Grimberg } 20973f2304f8SSagi Grimberg 20983f2304f8SSagi Grimberg static void nvme_tcp_set_sg_inline(struct nvme_tcp_queue *queue, 20993f2304f8SSagi Grimberg struct nvme_command *c, u32 data_len) 21003f2304f8SSagi Grimberg { 21013f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21023f2304f8SSagi Grimberg 21033f2304f8SSagi Grimberg sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); 21043f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21053f2304f8SSagi Grimberg sg->type = (NVME_SGL_FMT_DATA_DESC << 4) | NVME_SGL_FMT_OFFSET; 21063f2304f8SSagi Grimberg } 21073f2304f8SSagi Grimberg 21083f2304f8SSagi Grimberg static void nvme_tcp_set_sg_host_data(struct nvme_command *c, 21093f2304f8SSagi Grimberg u32 data_len) 21103f2304f8SSagi Grimberg { 21113f2304f8SSagi Grimberg struct nvme_sgl_desc *sg = &c->common.dptr.sgl; 21123f2304f8SSagi Grimberg 21133f2304f8SSagi Grimberg sg->addr = 0; 21143f2304f8SSagi Grimberg sg->length = cpu_to_le32(data_len); 21153f2304f8SSagi Grimberg sg->type = (NVME_TRANSPORT_SGL_DATA_DESC << 4) | 21163f2304f8SSagi Grimberg NVME_SGL_FMT_TRANSPORT_A; 21173f2304f8SSagi Grimberg } 21183f2304f8SSagi Grimberg 21193f2304f8SSagi Grimberg static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg) 21203f2304f8SSagi Grimberg { 21213f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = to_tcp_ctrl(arg); 21223f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = &ctrl->queues[0]; 21233f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = ctrl->async_req.pdu; 21243f2304f8SSagi Grimberg struct nvme_command *cmd = &pdu->cmd; 21253f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue); 21263f2304f8SSagi Grimberg 21273f2304f8SSagi Grimberg memset(pdu, 0, sizeof(*pdu)); 21283f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 21293f2304f8SSagi Grimberg if (queue->hdr_digest) 21303f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 21313f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 21323f2304f8SSagi Grimberg pdu->hdr.plen = cpu_to_le32(pdu->hdr.hlen + hdgst); 21333f2304f8SSagi Grimberg 21343f2304f8SSagi Grimberg cmd->common.opcode = nvme_admin_async_event; 21353f2304f8SSagi Grimberg cmd->common.command_id = NVME_AQ_BLK_MQ_DEPTH; 21363f2304f8SSagi Grimberg cmd->common.flags |= NVME_CMD_SGL_METABUF; 21373f2304f8SSagi Grimberg nvme_tcp_set_sg_null(cmd); 21383f2304f8SSagi Grimberg 21393f2304f8SSagi Grimberg ctrl->async_req.state = NVME_TCP_SEND_CMD_PDU; 21403f2304f8SSagi Grimberg ctrl->async_req.offset = 0; 21413f2304f8SSagi Grimberg ctrl->async_req.curr_bio = NULL; 21423f2304f8SSagi Grimberg ctrl->async_req.data_len = 0; 21433f2304f8SSagi Grimberg 2144db5ad6b7SSagi Grimberg nvme_tcp_queue_request(&ctrl->async_req, true); 21453f2304f8SSagi Grimberg } 21463f2304f8SSagi Grimberg 21473f2304f8SSagi Grimberg static enum blk_eh_timer_return 21483f2304f8SSagi Grimberg nvme_tcp_timeout(struct request *rq, bool reserved) 21493f2304f8SSagi Grimberg { 21503f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 21513f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl = req->queue->ctrl; 21523f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 21533f2304f8SSagi Grimberg 215492b98e88SKeith Busch /* 215592b98e88SKeith Busch * Restart the timer if a controller reset is already scheduled. Any 215692b98e88SKeith Busch * timed out commands would be handled before entering the connecting 215792b98e88SKeith Busch * state. 215892b98e88SKeith Busch */ 215992b98e88SKeith Busch if (ctrl->ctrl.state == NVME_CTRL_RESETTING) 216092b98e88SKeith Busch return BLK_EH_RESET_TIMER; 216192b98e88SKeith Busch 216239d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, 21633f2304f8SSagi Grimberg "queue %d: timeout request %#x type %d\n", 216439d57757SSagi Grimberg nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type); 21653f2304f8SSagi Grimberg 21663f2304f8SSagi Grimberg if (ctrl->ctrl.state != NVME_CTRL_LIVE) { 216739d57757SSagi Grimberg /* 216839d57757SSagi Grimberg * Teardown immediately if controller times out while starting 216939d57757SSagi Grimberg * or we are already started error recovery. all outstanding 217039d57757SSagi Grimberg * requests are completed on shutdown, so we return BLK_EH_DONE. 217139d57757SSagi Grimberg */ 217239d57757SSagi Grimberg flush_work(&ctrl->err_work); 217339d57757SSagi Grimberg nvme_tcp_teardown_io_queues(&ctrl->ctrl, false); 217439d57757SSagi Grimberg nvme_tcp_teardown_admin_queue(&ctrl->ctrl, false); 21753f2304f8SSagi Grimberg return BLK_EH_DONE; 21763f2304f8SSagi Grimberg } 21773f2304f8SSagi Grimberg 217839d57757SSagi Grimberg dev_warn(ctrl->ctrl.device, "starting error recovery\n"); 21793f2304f8SSagi Grimberg nvme_tcp_error_recovery(&ctrl->ctrl); 21803f2304f8SSagi Grimberg 21813f2304f8SSagi Grimberg return BLK_EH_RESET_TIMER; 21823f2304f8SSagi Grimberg } 21833f2304f8SSagi Grimberg 21843f2304f8SSagi Grimberg static blk_status_t nvme_tcp_map_data(struct nvme_tcp_queue *queue, 21853f2304f8SSagi Grimberg struct request *rq) 21863f2304f8SSagi Grimberg { 21873f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 21883f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 21893f2304f8SSagi Grimberg struct nvme_command *c = &pdu->cmd; 21903f2304f8SSagi Grimberg 21913f2304f8SSagi Grimberg c->common.flags |= NVME_CMD_SGL_METABUF; 21923f2304f8SSagi Grimberg 219325e5cb78SSagi Grimberg if (!blk_rq_nr_phys_segments(rq)) 219425e5cb78SSagi Grimberg nvme_tcp_set_sg_null(c); 219525e5cb78SSagi Grimberg else if (rq_data_dir(rq) == WRITE && 21963f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 21973f2304f8SSagi Grimberg nvme_tcp_set_sg_inline(queue, c, req->data_len); 21983f2304f8SSagi Grimberg else 21993f2304f8SSagi Grimberg nvme_tcp_set_sg_host_data(c, req->data_len); 22003f2304f8SSagi Grimberg 22013f2304f8SSagi Grimberg return 0; 22023f2304f8SSagi Grimberg } 22033f2304f8SSagi Grimberg 22043f2304f8SSagi Grimberg static blk_status_t nvme_tcp_setup_cmd_pdu(struct nvme_ns *ns, 22053f2304f8SSagi Grimberg struct request *rq) 22063f2304f8SSagi Grimberg { 22073f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22083f2304f8SSagi Grimberg struct nvme_tcp_cmd_pdu *pdu = req->pdu; 22093f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = req->queue; 22103f2304f8SSagi Grimberg u8 hdgst = nvme_tcp_hdgst_len(queue), ddgst = 0; 22113f2304f8SSagi Grimberg blk_status_t ret; 22123f2304f8SSagi Grimberg 22133f2304f8SSagi Grimberg ret = nvme_setup_cmd(ns, rq, &pdu->cmd); 22143f2304f8SSagi Grimberg if (ret) 22153f2304f8SSagi Grimberg return ret; 22163f2304f8SSagi Grimberg 22173f2304f8SSagi Grimberg req->state = NVME_TCP_SEND_CMD_PDU; 22183f2304f8SSagi Grimberg req->offset = 0; 22193f2304f8SSagi Grimberg req->data_sent = 0; 22203f2304f8SSagi Grimberg req->pdu_len = 0; 22213f2304f8SSagi Grimberg req->pdu_sent = 0; 222225e5cb78SSagi Grimberg req->data_len = blk_rq_nr_phys_segments(rq) ? 222325e5cb78SSagi Grimberg blk_rq_payload_bytes(rq) : 0; 22243f2304f8SSagi Grimberg req->curr_bio = rq->bio; 22253f2304f8SSagi Grimberg 22263f2304f8SSagi Grimberg if (rq_data_dir(rq) == WRITE && 22273f2304f8SSagi Grimberg req->data_len <= nvme_tcp_inline_data_size(queue)) 22283f2304f8SSagi Grimberg req->pdu_len = req->data_len; 22293f2304f8SSagi Grimberg else if (req->curr_bio) 22303f2304f8SSagi Grimberg nvme_tcp_init_iter(req, READ); 22313f2304f8SSagi Grimberg 22323f2304f8SSagi Grimberg pdu->hdr.type = nvme_tcp_cmd; 22333f2304f8SSagi Grimberg pdu->hdr.flags = 0; 22343f2304f8SSagi Grimberg if (queue->hdr_digest) 22353f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_HDGST; 22363f2304f8SSagi Grimberg if (queue->data_digest && req->pdu_len) { 22373f2304f8SSagi Grimberg pdu->hdr.flags |= NVME_TCP_F_DDGST; 22383f2304f8SSagi Grimberg ddgst = nvme_tcp_ddgst_len(queue); 22393f2304f8SSagi Grimberg } 22403f2304f8SSagi Grimberg pdu->hdr.hlen = sizeof(*pdu); 22413f2304f8SSagi Grimberg pdu->hdr.pdo = req->pdu_len ? pdu->hdr.hlen + hdgst : 0; 22423f2304f8SSagi Grimberg pdu->hdr.plen = 22433f2304f8SSagi Grimberg cpu_to_le32(pdu->hdr.hlen + hdgst + req->pdu_len + ddgst); 22443f2304f8SSagi Grimberg 22453f2304f8SSagi Grimberg ret = nvme_tcp_map_data(queue, rq); 22463f2304f8SSagi Grimberg if (unlikely(ret)) { 224728a4cac4SMax Gurtovoy nvme_cleanup_cmd(rq); 22483f2304f8SSagi Grimberg dev_err(queue->ctrl->ctrl.device, 22493f2304f8SSagi Grimberg "Failed to map data (%d)\n", ret); 22503f2304f8SSagi Grimberg return ret; 22513f2304f8SSagi Grimberg } 22523f2304f8SSagi Grimberg 22533f2304f8SSagi Grimberg return 0; 22543f2304f8SSagi Grimberg } 22553f2304f8SSagi Grimberg 22563f2304f8SSagi Grimberg static blk_status_t nvme_tcp_queue_rq(struct blk_mq_hw_ctx *hctx, 22573f2304f8SSagi Grimberg const struct blk_mq_queue_data *bd) 22583f2304f8SSagi Grimberg { 22593f2304f8SSagi Grimberg struct nvme_ns *ns = hctx->queue->queuedata; 22603f2304f8SSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 22613f2304f8SSagi Grimberg struct request *rq = bd->rq; 22623f2304f8SSagi Grimberg struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq); 22633f2304f8SSagi Grimberg bool queue_ready = test_bit(NVME_TCP_Q_LIVE, &queue->flags); 22643f2304f8SSagi Grimberg blk_status_t ret; 22653f2304f8SSagi Grimberg 22663f2304f8SSagi Grimberg if (!nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready)) 22673f2304f8SSagi Grimberg return nvmf_fail_nonready_command(&queue->ctrl->ctrl, rq); 22683f2304f8SSagi Grimberg 22693f2304f8SSagi Grimberg ret = nvme_tcp_setup_cmd_pdu(ns, rq); 22703f2304f8SSagi Grimberg if (unlikely(ret)) 22713f2304f8SSagi Grimberg return ret; 22723f2304f8SSagi Grimberg 22733f2304f8SSagi Grimberg blk_mq_start_request(rq); 22743f2304f8SSagi Grimberg 2275db5ad6b7SSagi Grimberg nvme_tcp_queue_request(req, true); 22763f2304f8SSagi Grimberg 22773f2304f8SSagi Grimberg return BLK_STS_OK; 22783f2304f8SSagi Grimberg } 22793f2304f8SSagi Grimberg 2280873946f4SSagi Grimberg static int nvme_tcp_map_queues(struct blk_mq_tag_set *set) 2281873946f4SSagi Grimberg { 2282873946f4SSagi Grimberg struct nvme_tcp_ctrl *ctrl = set->driver_data; 228364861993SSagi Grimberg struct nvmf_ctrl_options *opts = ctrl->ctrl.opts; 2284873946f4SSagi Grimberg 228564861993SSagi Grimberg if (opts->nr_write_queues && ctrl->io_queues[HCTX_TYPE_READ]) { 2286873946f4SSagi Grimberg /* separate read/write queues */ 2287873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 228864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 228964861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 229064861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 229164861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 2292873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 229364861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2294873946f4SSagi Grimberg } else { 229564861993SSagi Grimberg /* shared read/write queues */ 2296873946f4SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].nr_queues = 229764861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 229864861993SSagi Grimberg set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; 229964861993SSagi Grimberg set->map[HCTX_TYPE_READ].nr_queues = 230064861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT]; 2301873946f4SSagi Grimberg set->map[HCTX_TYPE_READ].queue_offset = 0; 2302873946f4SSagi Grimberg } 2303873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]); 2304873946f4SSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_READ]); 230564861993SSagi Grimberg 23061a9460ceSSagi Grimberg if (opts->nr_poll_queues && ctrl->io_queues[HCTX_TYPE_POLL]) { 23071a9460ceSSagi Grimberg /* map dedicated poll queues only if we have queues left */ 23081a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].nr_queues = 23091a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]; 23101a9460ceSSagi Grimberg set->map[HCTX_TYPE_POLL].queue_offset = 23111a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT] + 23121a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ]; 23131a9460ceSSagi Grimberg blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); 23141a9460ceSSagi Grimberg } 23151a9460ceSSagi Grimberg 231664861993SSagi Grimberg dev_info(ctrl->ctrl.device, 23171a9460ceSSagi Grimberg "mapped %d/%d/%d default/read/poll queues.\n", 231864861993SSagi Grimberg ctrl->io_queues[HCTX_TYPE_DEFAULT], 23191a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_READ], 23201a9460ceSSagi Grimberg ctrl->io_queues[HCTX_TYPE_POLL]); 232164861993SSagi Grimberg 2322873946f4SSagi Grimberg return 0; 2323873946f4SSagi Grimberg } 2324873946f4SSagi Grimberg 23251a9460ceSSagi Grimberg static int nvme_tcp_poll(struct blk_mq_hw_ctx *hctx) 23261a9460ceSSagi Grimberg { 23271a9460ceSSagi Grimberg struct nvme_tcp_queue *queue = hctx->driver_data; 23281a9460ceSSagi Grimberg struct sock *sk = queue->sock->sk; 23291a9460ceSSagi Grimberg 2330f86e5bf8SSagi Grimberg if (!test_bit(NVME_TCP_Q_LIVE, &queue->flags)) 2331f86e5bf8SSagi Grimberg return 0; 2332f86e5bf8SSagi Grimberg 233372e5d757SSagi Grimberg set_bit(NVME_TCP_Q_POLLING, &queue->flags); 23343f926af3SEric Dumazet if (sk_can_busy_loop(sk) && skb_queue_empty_lockless(&sk->sk_receive_queue)) 23351a9460ceSSagi Grimberg sk_busy_loop(sk, true); 23361a9460ceSSagi Grimberg nvme_tcp_try_recv(queue); 233772e5d757SSagi Grimberg clear_bit(NVME_TCP_Q_POLLING, &queue->flags); 23381a9460ceSSagi Grimberg return queue->nr_cqe; 23391a9460ceSSagi Grimberg } 23401a9460ceSSagi Grimberg 23413f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_mq_ops = { 23423f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 23433f2304f8SSagi Grimberg .complete = nvme_complete_rq, 23443f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 23453f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 23463f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_hctx, 23473f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 2348873946f4SSagi Grimberg .map_queues = nvme_tcp_map_queues, 23491a9460ceSSagi Grimberg .poll = nvme_tcp_poll, 23503f2304f8SSagi Grimberg }; 23513f2304f8SSagi Grimberg 23523f2304f8SSagi Grimberg static struct blk_mq_ops nvme_tcp_admin_mq_ops = { 23533f2304f8SSagi Grimberg .queue_rq = nvme_tcp_queue_rq, 23543f2304f8SSagi Grimberg .complete = nvme_complete_rq, 23553f2304f8SSagi Grimberg .init_request = nvme_tcp_init_request, 23563f2304f8SSagi Grimberg .exit_request = nvme_tcp_exit_request, 23573f2304f8SSagi Grimberg .init_hctx = nvme_tcp_init_admin_hctx, 23583f2304f8SSagi Grimberg .timeout = nvme_tcp_timeout, 23593f2304f8SSagi Grimberg }; 23603f2304f8SSagi Grimberg 23613f2304f8SSagi Grimberg static const struct nvme_ctrl_ops nvme_tcp_ctrl_ops = { 23623f2304f8SSagi Grimberg .name = "tcp", 23633f2304f8SSagi Grimberg .module = THIS_MODULE, 23643f2304f8SSagi Grimberg .flags = NVME_F_FABRICS, 23653f2304f8SSagi Grimberg .reg_read32 = nvmf_reg_read32, 23663f2304f8SSagi Grimberg .reg_read64 = nvmf_reg_read64, 23673f2304f8SSagi Grimberg .reg_write32 = nvmf_reg_write32, 23683f2304f8SSagi Grimberg .free_ctrl = nvme_tcp_free_ctrl, 23693f2304f8SSagi Grimberg .submit_async_event = nvme_tcp_submit_async_event, 23703f2304f8SSagi Grimberg .delete_ctrl = nvme_tcp_delete_ctrl, 23713f2304f8SSagi Grimberg .get_address = nvmf_get_address, 23723f2304f8SSagi Grimberg }; 23733f2304f8SSagi Grimberg 23743f2304f8SSagi Grimberg static bool 23753f2304f8SSagi Grimberg nvme_tcp_existing_controller(struct nvmf_ctrl_options *opts) 23763f2304f8SSagi Grimberg { 23773f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 23783f2304f8SSagi Grimberg bool found = false; 23793f2304f8SSagi Grimberg 23803f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 23813f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) { 23823f2304f8SSagi Grimberg found = nvmf_ip_options_match(&ctrl->ctrl, opts); 23833f2304f8SSagi Grimberg if (found) 23843f2304f8SSagi Grimberg break; 23853f2304f8SSagi Grimberg } 23863f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 23873f2304f8SSagi Grimberg 23883f2304f8SSagi Grimberg return found; 23893f2304f8SSagi Grimberg } 23903f2304f8SSagi Grimberg 23913f2304f8SSagi Grimberg static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev, 23923f2304f8SSagi Grimberg struct nvmf_ctrl_options *opts) 23933f2304f8SSagi Grimberg { 23943f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 23953f2304f8SSagi Grimberg int ret; 23963f2304f8SSagi Grimberg 23973f2304f8SSagi Grimberg ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); 23983f2304f8SSagi Grimberg if (!ctrl) 23993f2304f8SSagi Grimberg return ERR_PTR(-ENOMEM); 24003f2304f8SSagi Grimberg 24013f2304f8SSagi Grimberg INIT_LIST_HEAD(&ctrl->list); 24023f2304f8SSagi Grimberg ctrl->ctrl.opts = opts; 24031a9460ceSSagi Grimberg ctrl->ctrl.queue_count = opts->nr_io_queues + opts->nr_write_queues + 24041a9460ceSSagi Grimberg opts->nr_poll_queues + 1; 24053f2304f8SSagi Grimberg ctrl->ctrl.sqsize = opts->queue_size - 1; 24063f2304f8SSagi Grimberg ctrl->ctrl.kato = opts->kato; 24073f2304f8SSagi Grimberg 24083f2304f8SSagi Grimberg INIT_DELAYED_WORK(&ctrl->connect_work, 24093f2304f8SSagi Grimberg nvme_tcp_reconnect_ctrl_work); 24103f2304f8SSagi Grimberg INIT_WORK(&ctrl->err_work, nvme_tcp_error_recovery_work); 24113f2304f8SSagi Grimberg INIT_WORK(&ctrl->ctrl.reset_work, nvme_reset_ctrl_work); 24123f2304f8SSagi Grimberg 24133f2304f8SSagi Grimberg if (!(opts->mask & NVMF_OPT_TRSVCID)) { 24143f2304f8SSagi Grimberg opts->trsvcid = 24153f2304f8SSagi Grimberg kstrdup(__stringify(NVME_TCP_DISC_PORT), GFP_KERNEL); 24163f2304f8SSagi Grimberg if (!opts->trsvcid) { 24173f2304f8SSagi Grimberg ret = -ENOMEM; 24183f2304f8SSagi Grimberg goto out_free_ctrl; 24193f2304f8SSagi Grimberg } 24203f2304f8SSagi Grimberg opts->mask |= NVMF_OPT_TRSVCID; 24213f2304f8SSagi Grimberg } 24223f2304f8SSagi Grimberg 24233f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24243f2304f8SSagi Grimberg opts->traddr, opts->trsvcid, &ctrl->addr); 24253f2304f8SSagi Grimberg if (ret) { 24263f2304f8SSagi Grimberg pr_err("malformed address passed: %s:%s\n", 24273f2304f8SSagi Grimberg opts->traddr, opts->trsvcid); 24283f2304f8SSagi Grimberg goto out_free_ctrl; 24293f2304f8SSagi Grimberg } 24303f2304f8SSagi Grimberg 24313f2304f8SSagi Grimberg if (opts->mask & NVMF_OPT_HOST_TRADDR) { 24323f2304f8SSagi Grimberg ret = inet_pton_with_scope(&init_net, AF_UNSPEC, 24333f2304f8SSagi Grimberg opts->host_traddr, NULL, &ctrl->src_addr); 24343f2304f8SSagi Grimberg if (ret) { 24353f2304f8SSagi Grimberg pr_err("malformed src address passed: %s\n", 24363f2304f8SSagi Grimberg opts->host_traddr); 24373f2304f8SSagi Grimberg goto out_free_ctrl; 24383f2304f8SSagi Grimberg } 24393f2304f8SSagi Grimberg } 24403f2304f8SSagi Grimberg 24413f2304f8SSagi Grimberg if (!opts->duplicate_connect && nvme_tcp_existing_controller(opts)) { 24423f2304f8SSagi Grimberg ret = -EALREADY; 24433f2304f8SSagi Grimberg goto out_free_ctrl; 24443f2304f8SSagi Grimberg } 24453f2304f8SSagi Grimberg 2446873946f4SSagi Grimberg ctrl->queues = kcalloc(ctrl->ctrl.queue_count, sizeof(*ctrl->queues), 24473f2304f8SSagi Grimberg GFP_KERNEL); 24483f2304f8SSagi Grimberg if (!ctrl->queues) { 24493f2304f8SSagi Grimberg ret = -ENOMEM; 24503f2304f8SSagi Grimberg goto out_free_ctrl; 24513f2304f8SSagi Grimberg } 24523f2304f8SSagi Grimberg 24533f2304f8SSagi Grimberg ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_tcp_ctrl_ops, 0); 24543f2304f8SSagi Grimberg if (ret) 24553f2304f8SSagi Grimberg goto out_kfree_queues; 24563f2304f8SSagi Grimberg 24573f2304f8SSagi Grimberg if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { 24583f2304f8SSagi Grimberg WARN_ON_ONCE(1); 24593f2304f8SSagi Grimberg ret = -EINTR; 24603f2304f8SSagi Grimberg goto out_uninit_ctrl; 24613f2304f8SSagi Grimberg } 24623f2304f8SSagi Grimberg 24633f2304f8SSagi Grimberg ret = nvme_tcp_setup_ctrl(&ctrl->ctrl, true); 24643f2304f8SSagi Grimberg if (ret) 24653f2304f8SSagi Grimberg goto out_uninit_ctrl; 24663f2304f8SSagi Grimberg 24673f2304f8SSagi Grimberg dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n", 24683f2304f8SSagi Grimberg ctrl->ctrl.opts->subsysnqn, &ctrl->addr); 24693f2304f8SSagi Grimberg 24703f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 24713f2304f8SSagi Grimberg list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list); 24723f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 24733f2304f8SSagi Grimberg 24743f2304f8SSagi Grimberg return &ctrl->ctrl; 24753f2304f8SSagi Grimberg 24763f2304f8SSagi Grimberg out_uninit_ctrl: 24773f2304f8SSagi Grimberg nvme_uninit_ctrl(&ctrl->ctrl); 24783f2304f8SSagi Grimberg nvme_put_ctrl(&ctrl->ctrl); 24793f2304f8SSagi Grimberg if (ret > 0) 24803f2304f8SSagi Grimberg ret = -EIO; 24813f2304f8SSagi Grimberg return ERR_PTR(ret); 24823f2304f8SSagi Grimberg out_kfree_queues: 24833f2304f8SSagi Grimberg kfree(ctrl->queues); 24843f2304f8SSagi Grimberg out_free_ctrl: 24853f2304f8SSagi Grimberg kfree(ctrl); 24863f2304f8SSagi Grimberg return ERR_PTR(ret); 24873f2304f8SSagi Grimberg } 24883f2304f8SSagi Grimberg 24893f2304f8SSagi Grimberg static struct nvmf_transport_ops nvme_tcp_transport = { 24903f2304f8SSagi Grimberg .name = "tcp", 24913f2304f8SSagi Grimberg .module = THIS_MODULE, 24923f2304f8SSagi Grimberg .required_opts = NVMF_OPT_TRADDR, 24933f2304f8SSagi Grimberg .allowed_opts = NVMF_OPT_TRSVCID | NVMF_OPT_RECONNECT_DELAY | 24943f2304f8SSagi Grimberg NVMF_OPT_HOST_TRADDR | NVMF_OPT_CTRL_LOSS_TMO | 2495873946f4SSagi Grimberg NVMF_OPT_HDR_DIGEST | NVMF_OPT_DATA_DIGEST | 2496bb13985dSIsrael Rukshin NVMF_OPT_NR_WRITE_QUEUES | NVMF_OPT_NR_POLL_QUEUES | 2497bb13985dSIsrael Rukshin NVMF_OPT_TOS, 24983f2304f8SSagi Grimberg .create_ctrl = nvme_tcp_create_ctrl, 24993f2304f8SSagi Grimberg }; 25003f2304f8SSagi Grimberg 25013f2304f8SSagi Grimberg static int __init nvme_tcp_init_module(void) 25023f2304f8SSagi Grimberg { 25033f2304f8SSagi Grimberg nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", 25043f2304f8SSagi Grimberg WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); 25053f2304f8SSagi Grimberg if (!nvme_tcp_wq) 25063f2304f8SSagi Grimberg return -ENOMEM; 25073f2304f8SSagi Grimberg 25083f2304f8SSagi Grimberg nvmf_register_transport(&nvme_tcp_transport); 25093f2304f8SSagi Grimberg return 0; 25103f2304f8SSagi Grimberg } 25113f2304f8SSagi Grimberg 25123f2304f8SSagi Grimberg static void __exit nvme_tcp_cleanup_module(void) 25133f2304f8SSagi Grimberg { 25143f2304f8SSagi Grimberg struct nvme_tcp_ctrl *ctrl; 25153f2304f8SSagi Grimberg 25163f2304f8SSagi Grimberg nvmf_unregister_transport(&nvme_tcp_transport); 25173f2304f8SSagi Grimberg 25183f2304f8SSagi Grimberg mutex_lock(&nvme_tcp_ctrl_mutex); 25193f2304f8SSagi Grimberg list_for_each_entry(ctrl, &nvme_tcp_ctrl_list, list) 25203f2304f8SSagi Grimberg nvme_delete_ctrl(&ctrl->ctrl); 25213f2304f8SSagi Grimberg mutex_unlock(&nvme_tcp_ctrl_mutex); 25223f2304f8SSagi Grimberg flush_workqueue(nvme_delete_wq); 25233f2304f8SSagi Grimberg 25243f2304f8SSagi Grimberg destroy_workqueue(nvme_tcp_wq); 25253f2304f8SSagi Grimberg } 25263f2304f8SSagi Grimberg 25273f2304f8SSagi Grimberg module_init(nvme_tcp_init_module); 25283f2304f8SSagi Grimberg module_exit(nvme_tcp_cleanup_module); 25293f2304f8SSagi Grimberg 25303f2304f8SSagi Grimberg MODULE_LICENSE("GPL v2"); 2531