1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2015-2016 HGST, a Western Digital Company. 4 */ 5 6 #ifndef _NVMET_H 7 #define _NVMET_H 8 9 #include <linux/dma-mapping.h> 10 #include <linux/types.h> 11 #include <linux/device.h> 12 #include <linux/kref.h> 13 #include <linux/percpu-refcount.h> 14 #include <linux/list.h> 15 #include <linux/mutex.h> 16 #include <linux/uuid.h> 17 #include <linux/nvme.h> 18 #include <linux/configfs.h> 19 #include <linux/rcupdate.h> 20 #include <linux/blkdev.h> 21 #include <linux/radix-tree.h> 22 #include <linux/t10-pi.h> 23 24 #define NVMET_DEFAULT_VS NVME_VS(1, 3, 0) 25 26 #define NVMET_ASYNC_EVENTS 4 27 #define NVMET_ERROR_LOG_SLOTS 128 28 #define NVMET_NO_ERROR_LOC ((u16)-1) 29 #define NVMET_DEFAULT_CTRL_MODEL "Linux" 30 #define NVMET_MN_MAX_SIZE 40 31 #define NVMET_SN_MAX_SIZE 20 32 #define NVMET_FR_MAX_SIZE 8 33 34 /* 35 * Supported optional AENs: 36 */ 37 #define NVMET_AEN_CFG_OPTIONAL \ 38 (NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_ANA_CHANGE) 39 #define NVMET_DISC_AEN_CFG_OPTIONAL \ 40 (NVME_AEN_CFG_DISC_CHANGE) 41 42 /* 43 * Plus mandatory SMART AENs (we'll never send them, but allow enabling them): 44 */ 45 #define NVMET_AEN_CFG_ALL \ 46 (NVME_SMART_CRIT_SPARE | NVME_SMART_CRIT_TEMPERATURE | \ 47 NVME_SMART_CRIT_RELIABILITY | NVME_SMART_CRIT_MEDIA | \ 48 NVME_SMART_CRIT_VOLATILE_MEMORY | NVMET_AEN_CFG_OPTIONAL) 49 50 /* Helper Macros when NVMe error is NVME_SC_CONNECT_INVALID_PARAM 51 * The 16 bit shift is to set IATTR bit to 1, which means offending 52 * offset starts in the data section of connect() 53 */ 54 #define IPO_IATTR_CONNECT_DATA(x) \ 55 (cpu_to_le32((1 << 16) | (offsetof(struct nvmf_connect_data, x)))) 56 #define IPO_IATTR_CONNECT_SQE(x) \ 57 (cpu_to_le32(offsetof(struct nvmf_connect_command, x))) 58 59 struct nvmet_ns { 60 struct percpu_ref ref; 61 struct file *bdev_file; 62 struct block_device *bdev; 63 struct file *file; 64 bool readonly; 65 u32 nsid; 66 u32 blksize_shift; 67 loff_t size; 68 u8 nguid[16]; 69 uuid_t uuid; 70 u32 anagrpid; 71 72 bool buffered_io; 73 bool enabled; 74 struct nvmet_subsys *subsys; 75 const char *device_path; 76 77 struct config_group device_group; 78 struct config_group group; 79 80 struct completion disable_done; 81 mempool_t *bvec_pool; 82 83 struct pci_dev *p2p_dev; 84 int use_p2pmem; 85 int pi_type; 86 int metadata_size; 87 u8 csi; 88 }; 89 90 static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item) 91 { 92 return container_of(to_config_group(item), struct nvmet_ns, group); 93 } 94 95 static inline struct device *nvmet_ns_dev(struct nvmet_ns *ns) 96 { 97 return ns->bdev ? disk_to_dev(ns->bdev->bd_disk) : NULL; 98 } 99 100 struct nvmet_cq { 101 u16 qid; 102 u16 size; 103 }; 104 105 struct nvmet_sq { 106 struct nvmet_ctrl *ctrl; 107 struct percpu_ref ref; 108 u16 qid; 109 u16 size; 110 u32 sqhd; 111 bool sqhd_disabled; 112 #ifdef CONFIG_NVME_TARGET_AUTH 113 bool authenticated; 114 struct delayed_work auth_expired_work; 115 u16 dhchap_tid; 116 u8 dhchap_status; 117 u8 dhchap_step; 118 u8 *dhchap_c1; 119 u8 *dhchap_c2; 120 u32 dhchap_s1; 121 u32 dhchap_s2; 122 u8 *dhchap_skey; 123 int dhchap_skey_len; 124 #endif 125 struct completion free_done; 126 struct completion confirm_done; 127 }; 128 129 struct nvmet_ana_group { 130 struct config_group group; 131 struct nvmet_port *port; 132 u32 grpid; 133 }; 134 135 static inline struct nvmet_ana_group *to_ana_group(struct config_item *item) 136 { 137 return container_of(to_config_group(item), struct nvmet_ana_group, 138 group); 139 } 140 141 /** 142 * struct nvmet_port - Common structure to keep port 143 * information for the target. 144 * @entry: Entry into referrals or transport list. 145 * @disc_addr: Address information is stored in a format defined 146 * for a discovery log page entry. 147 * @group: ConfigFS group for this element's folder. 148 * @priv: Private data for the transport. 149 */ 150 struct nvmet_port { 151 struct list_head entry; 152 struct nvmf_disc_rsp_page_entry disc_addr; 153 struct config_group group; 154 struct config_group subsys_group; 155 struct list_head subsystems; 156 struct config_group referrals_group; 157 struct list_head referrals; 158 struct list_head global_entry; 159 struct config_group ana_groups_group; 160 struct nvmet_ana_group ana_default_group; 161 enum nvme_ana_state *ana_state; 162 struct key *keyring; 163 void *priv; 164 bool enabled; 165 int inline_data_size; 166 int max_queue_size; 167 const struct nvmet_fabrics_ops *tr_ops; 168 bool pi_enable; 169 }; 170 171 static inline struct nvmet_port *to_nvmet_port(struct config_item *item) 172 { 173 return container_of(to_config_group(item), struct nvmet_port, 174 group); 175 } 176 177 static inline struct nvmet_port *ana_groups_to_port( 178 struct config_item *item) 179 { 180 return container_of(to_config_group(item), struct nvmet_port, 181 ana_groups_group); 182 } 183 184 static inline u8 nvmet_port_disc_addr_treq_secure_channel(struct nvmet_port *port) 185 { 186 return (port->disc_addr.treq & NVME_TREQ_SECURE_CHANNEL_MASK); 187 } 188 189 static inline bool nvmet_port_secure_channel_required(struct nvmet_port *port) 190 { 191 return nvmet_port_disc_addr_treq_secure_channel(port) == NVMF_TREQ_REQUIRED; 192 } 193 194 struct nvmet_ctrl { 195 struct nvmet_subsys *subsys; 196 struct nvmet_sq **sqs; 197 198 bool reset_tbkas; 199 200 struct mutex lock; 201 u64 cap; 202 u32 cc; 203 u32 csts; 204 205 uuid_t hostid; 206 u16 cntlid; 207 u32 kato; 208 209 struct nvmet_port *port; 210 211 u32 aen_enabled; 212 unsigned long aen_masked; 213 struct nvmet_req *async_event_cmds[NVMET_ASYNC_EVENTS]; 214 unsigned int nr_async_event_cmds; 215 struct list_head async_events; 216 struct work_struct async_event_work; 217 218 struct list_head subsys_entry; 219 struct kref ref; 220 struct delayed_work ka_work; 221 struct work_struct fatal_err_work; 222 223 const struct nvmet_fabrics_ops *ops; 224 225 __le32 *changed_ns_list; 226 u32 nr_changed_ns; 227 228 char subsysnqn[NVMF_NQN_FIELD_LEN]; 229 char hostnqn[NVMF_NQN_FIELD_LEN]; 230 231 struct device *p2p_client; 232 struct radix_tree_root p2p_ns_map; 233 234 spinlock_t error_lock; 235 u64 err_counter; 236 struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS]; 237 bool pi_support; 238 #ifdef CONFIG_NVME_TARGET_AUTH 239 struct nvme_dhchap_key *host_key; 240 struct nvme_dhchap_key *ctrl_key; 241 u8 shash_id; 242 struct crypto_kpp *dh_tfm; 243 u8 dh_gid; 244 u8 *dh_key; 245 size_t dh_keysize; 246 #endif 247 }; 248 249 struct nvmet_subsys { 250 enum nvme_subsys_type type; 251 252 struct mutex lock; 253 struct kref ref; 254 255 struct xarray namespaces; 256 unsigned int nr_namespaces; 257 u32 max_nsid; 258 u16 cntlid_min; 259 u16 cntlid_max; 260 261 struct list_head ctrls; 262 263 struct list_head hosts; 264 bool allow_any_host; 265 266 u16 max_qid; 267 268 u64 ver; 269 char serial[NVMET_SN_MAX_SIZE]; 270 bool subsys_discovered; 271 char *subsysnqn; 272 bool pi_support; 273 274 struct config_group group; 275 276 struct config_group namespaces_group; 277 struct config_group allowed_hosts_group; 278 279 char *model_number; 280 u32 ieee_oui; 281 char *firmware_rev; 282 283 #ifdef CONFIG_NVME_TARGET_PASSTHRU 284 struct nvme_ctrl *passthru_ctrl; 285 char *passthru_ctrl_path; 286 struct config_group passthru_group; 287 unsigned int admin_timeout; 288 unsigned int io_timeout; 289 unsigned int clear_ids; 290 #endif /* CONFIG_NVME_TARGET_PASSTHRU */ 291 292 #ifdef CONFIG_BLK_DEV_ZONED 293 u8 zasl; 294 #endif /* CONFIG_BLK_DEV_ZONED */ 295 }; 296 297 static inline struct nvmet_subsys *to_subsys(struct config_item *item) 298 { 299 return container_of(to_config_group(item), struct nvmet_subsys, group); 300 } 301 302 static inline struct nvmet_subsys *namespaces_to_subsys( 303 struct config_item *item) 304 { 305 return container_of(to_config_group(item), struct nvmet_subsys, 306 namespaces_group); 307 } 308 309 struct nvmet_host { 310 struct config_group group; 311 u8 *dhchap_secret; 312 u8 *dhchap_ctrl_secret; 313 u8 dhchap_key_hash; 314 u8 dhchap_ctrl_key_hash; 315 u8 dhchap_hash_id; 316 u8 dhchap_dhgroup_id; 317 }; 318 319 static inline struct nvmet_host *to_host(struct config_item *item) 320 { 321 return container_of(to_config_group(item), struct nvmet_host, group); 322 } 323 324 static inline char *nvmet_host_name(struct nvmet_host *host) 325 { 326 return config_item_name(&host->group.cg_item); 327 } 328 329 struct nvmet_host_link { 330 struct list_head entry; 331 struct nvmet_host *host; 332 }; 333 334 struct nvmet_subsys_link { 335 struct list_head entry; 336 struct nvmet_subsys *subsys; 337 }; 338 339 struct nvmet_req; 340 struct nvmet_fabrics_ops { 341 struct module *owner; 342 unsigned int type; 343 unsigned int msdbd; 344 unsigned int flags; 345 #define NVMF_KEYED_SGLS (1 << 0) 346 #define NVMF_METADATA_SUPPORTED (1 << 1) 347 void (*queue_response)(struct nvmet_req *req); 348 int (*add_port)(struct nvmet_port *port); 349 void (*remove_port)(struct nvmet_port *port); 350 void (*delete_ctrl)(struct nvmet_ctrl *ctrl); 351 void (*disc_traddr)(struct nvmet_req *req, 352 struct nvmet_port *port, char *traddr); 353 u16 (*install_queue)(struct nvmet_sq *nvme_sq); 354 void (*discovery_chg)(struct nvmet_port *port); 355 u8 (*get_mdts)(const struct nvmet_ctrl *ctrl); 356 u16 (*get_max_queue_size)(const struct nvmet_ctrl *ctrl); 357 }; 358 359 #define NVMET_MAX_INLINE_BIOVEC 8 360 #define NVMET_MAX_INLINE_DATA_LEN NVMET_MAX_INLINE_BIOVEC * PAGE_SIZE 361 362 struct nvmet_req { 363 struct nvme_command *cmd; 364 struct nvme_completion *cqe; 365 struct nvmet_sq *sq; 366 struct nvmet_cq *cq; 367 struct nvmet_ns *ns; 368 struct scatterlist *sg; 369 struct scatterlist *metadata_sg; 370 struct bio_vec inline_bvec[NVMET_MAX_INLINE_BIOVEC]; 371 union { 372 struct { 373 struct bio inline_bio; 374 } b; 375 struct { 376 bool mpool_alloc; 377 struct kiocb iocb; 378 struct bio_vec *bvec; 379 struct work_struct work; 380 } f; 381 struct { 382 struct bio inline_bio; 383 struct request *rq; 384 struct work_struct work; 385 bool use_workqueue; 386 } p; 387 #ifdef CONFIG_BLK_DEV_ZONED 388 struct { 389 struct bio inline_bio; 390 struct work_struct zmgmt_work; 391 } z; 392 #endif /* CONFIG_BLK_DEV_ZONED */ 393 }; 394 int sg_cnt; 395 int metadata_sg_cnt; 396 /* data length as parsed from the SGL descriptor: */ 397 size_t transfer_len; 398 size_t metadata_len; 399 400 struct nvmet_port *port; 401 402 void (*execute)(struct nvmet_req *req); 403 const struct nvmet_fabrics_ops *ops; 404 405 struct pci_dev *p2p_dev; 406 struct device *p2p_client; 407 u16 error_loc; 408 u64 error_slba; 409 }; 410 411 #define NVMET_MAX_MPOOL_BVEC 16 412 extern struct kmem_cache *nvmet_bvec_cache; 413 extern struct workqueue_struct *buffered_io_wq; 414 extern struct workqueue_struct *zbd_wq; 415 extern struct workqueue_struct *nvmet_wq; 416 417 static inline void nvmet_set_result(struct nvmet_req *req, u32 result) 418 { 419 req->cqe->result.u32 = cpu_to_le32(result); 420 } 421 422 /* 423 * NVMe command writes actually are DMA reads for us on the target side. 424 */ 425 static inline enum dma_data_direction 426 nvmet_data_dir(struct nvmet_req *req) 427 { 428 return nvme_is_write(req->cmd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 429 } 430 431 struct nvmet_async_event { 432 struct list_head entry; 433 u8 event_type; 434 u8 event_info; 435 u8 log_page; 436 }; 437 438 static inline void nvmet_clear_aen_bit(struct nvmet_req *req, u32 bn) 439 { 440 int rae = le32_to_cpu(req->cmd->common.cdw10) & 1 << 15; 441 442 if (!rae) 443 clear_bit(bn, &req->sq->ctrl->aen_masked); 444 } 445 446 static inline bool nvmet_aen_bit_disabled(struct nvmet_ctrl *ctrl, u32 bn) 447 { 448 if (!(READ_ONCE(ctrl->aen_enabled) & (1 << bn))) 449 return true; 450 return test_and_set_bit(bn, &ctrl->aen_masked); 451 } 452 453 void nvmet_get_feat_kato(struct nvmet_req *req); 454 void nvmet_get_feat_async_event(struct nvmet_req *req); 455 u16 nvmet_set_feat_kato(struct nvmet_req *req); 456 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask); 457 void nvmet_execute_async_event(struct nvmet_req *req); 458 void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl); 459 void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl); 460 461 u16 nvmet_parse_connect_cmd(struct nvmet_req *req); 462 void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id); 463 u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req); 464 u16 nvmet_file_parse_io_cmd(struct nvmet_req *req); 465 u16 nvmet_bdev_zns_parse_io_cmd(struct nvmet_req *req); 466 u16 nvmet_parse_admin_cmd(struct nvmet_req *req); 467 u16 nvmet_parse_discovery_cmd(struct nvmet_req *req); 468 u16 nvmet_parse_fabrics_admin_cmd(struct nvmet_req *req); 469 u16 nvmet_parse_fabrics_io_cmd(struct nvmet_req *req); 470 471 bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, 472 struct nvmet_sq *sq, const struct nvmet_fabrics_ops *ops); 473 void nvmet_req_uninit(struct nvmet_req *req); 474 bool nvmet_check_transfer_len(struct nvmet_req *req, size_t len); 475 bool nvmet_check_data_len_lte(struct nvmet_req *req, size_t data_len); 476 void nvmet_req_complete(struct nvmet_req *req, u16 status); 477 int nvmet_req_alloc_sgls(struct nvmet_req *req); 478 void nvmet_req_free_sgls(struct nvmet_req *req); 479 480 void nvmet_execute_set_features(struct nvmet_req *req); 481 void nvmet_execute_get_features(struct nvmet_req *req); 482 void nvmet_execute_keep_alive(struct nvmet_req *req); 483 484 void nvmet_cq_setup(struct nvmet_ctrl *ctrl, struct nvmet_cq *cq, u16 qid, 485 u16 size); 486 void nvmet_sq_setup(struct nvmet_ctrl *ctrl, struct nvmet_sq *sq, u16 qid, 487 u16 size); 488 void nvmet_sq_destroy(struct nvmet_sq *sq); 489 int nvmet_sq_init(struct nvmet_sq *sq); 490 491 void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl); 492 493 void nvmet_update_cc(struct nvmet_ctrl *ctrl, u32 new); 494 u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn, 495 struct nvmet_req *req, u32 kato, struct nvmet_ctrl **ctrlp); 496 struct nvmet_ctrl *nvmet_ctrl_find_get(const char *subsysnqn, 497 const char *hostnqn, u16 cntlid, 498 struct nvmet_req *req); 499 void nvmet_ctrl_put(struct nvmet_ctrl *ctrl); 500 u16 nvmet_check_ctrl_status(struct nvmet_req *req); 501 502 struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn, 503 enum nvme_subsys_type type); 504 void nvmet_subsys_put(struct nvmet_subsys *subsys); 505 void nvmet_subsys_del_ctrls(struct nvmet_subsys *subsys); 506 507 u16 nvmet_req_find_ns(struct nvmet_req *req); 508 void nvmet_put_namespace(struct nvmet_ns *ns); 509 int nvmet_ns_enable(struct nvmet_ns *ns); 510 void nvmet_ns_disable(struct nvmet_ns *ns); 511 struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid); 512 void nvmet_ns_free(struct nvmet_ns *ns); 513 514 void nvmet_send_ana_event(struct nvmet_subsys *subsys, 515 struct nvmet_port *port); 516 void nvmet_port_send_ana_event(struct nvmet_port *port); 517 518 int nvmet_register_transport(const struct nvmet_fabrics_ops *ops); 519 void nvmet_unregister_transport(const struct nvmet_fabrics_ops *ops); 520 521 void nvmet_port_del_ctrls(struct nvmet_port *port, 522 struct nvmet_subsys *subsys); 523 524 int nvmet_enable_port(struct nvmet_port *port); 525 void nvmet_disable_port(struct nvmet_port *port); 526 527 void nvmet_referral_enable(struct nvmet_port *parent, struct nvmet_port *port); 528 void nvmet_referral_disable(struct nvmet_port *parent, struct nvmet_port *port); 529 530 u16 nvmet_copy_to_sgl(struct nvmet_req *req, off_t off, const void *buf, 531 size_t len); 532 u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf, 533 size_t len); 534 u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len); 535 536 u32 nvmet_get_log_page_len(struct nvme_command *cmd); 537 u64 nvmet_get_log_page_offset(struct nvme_command *cmd); 538 539 extern struct list_head *nvmet_ports; 540 void nvmet_port_disc_changed(struct nvmet_port *port, 541 struct nvmet_subsys *subsys); 542 void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys, 543 struct nvmet_host *host); 544 void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type, 545 u8 event_info, u8 log_page); 546 bool nvmet_subsys_nsid_exists(struct nvmet_subsys *subsys, u32 nsid); 547 548 #define NVMET_MIN_QUEUE_SIZE 16 549 #define NVMET_MAX_QUEUE_SIZE 1024 550 #define NVMET_NR_QUEUES 128 551 #define NVMET_MAX_CMD(ctrl) (NVME_CAP_MQES(ctrl->cap) + 1) 552 553 /* 554 * Nice round number that makes a list of nsids fit into a page. 555 * Should become tunable at some point in the future. 556 */ 557 #define NVMET_MAX_NAMESPACES 1024 558 559 /* 560 * 0 is not a valid ANA group ID, so we start numbering at 1. 561 * 562 * ANA Group 1 exists without manual intervention, has namespaces assigned to it 563 * by default, and is available in an optimized state through all ports. 564 */ 565 #define NVMET_MAX_ANAGRPS 128 566 #define NVMET_DEFAULT_ANA_GRPID 1 567 568 #define NVMET_KAS 10 569 #define NVMET_DISC_KATO_MS 120000 570 571 int __init nvmet_init_configfs(void); 572 void __exit nvmet_exit_configfs(void); 573 574 int __init nvmet_init_discovery(void); 575 void nvmet_exit_discovery(void); 576 577 extern struct nvmet_subsys *nvmet_disc_subsys; 578 extern struct rw_semaphore nvmet_config_sem; 579 580 extern u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1]; 581 extern u64 nvmet_ana_chgcnt; 582 extern struct rw_semaphore nvmet_ana_sem; 583 584 bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn); 585 586 int nvmet_bdev_ns_enable(struct nvmet_ns *ns); 587 int nvmet_file_ns_enable(struct nvmet_ns *ns); 588 void nvmet_bdev_ns_disable(struct nvmet_ns *ns); 589 void nvmet_file_ns_disable(struct nvmet_ns *ns); 590 u16 nvmet_bdev_flush(struct nvmet_req *req); 591 u16 nvmet_file_flush(struct nvmet_req *req); 592 void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid); 593 void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns); 594 void nvmet_file_ns_revalidate(struct nvmet_ns *ns); 595 bool nvmet_ns_revalidate(struct nvmet_ns *ns); 596 u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts); 597 598 bool nvmet_bdev_zns_enable(struct nvmet_ns *ns); 599 void nvmet_execute_identify_ctrl_zns(struct nvmet_req *req); 600 void nvmet_execute_identify_ns_zns(struct nvmet_req *req); 601 void nvmet_bdev_execute_zone_mgmt_recv(struct nvmet_req *req); 602 void nvmet_bdev_execute_zone_mgmt_send(struct nvmet_req *req); 603 void nvmet_bdev_execute_zone_append(struct nvmet_req *req); 604 605 static inline u32 nvmet_rw_data_len(struct nvmet_req *req) 606 { 607 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) << 608 req->ns->blksize_shift; 609 } 610 611 static inline u32 nvmet_rw_metadata_len(struct nvmet_req *req) 612 { 613 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) 614 return 0; 615 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) * 616 req->ns->metadata_size; 617 } 618 619 static inline u32 nvmet_dsm_len(struct nvmet_req *req) 620 { 621 return (le32_to_cpu(req->cmd->dsm.nr) + 1) * 622 sizeof(struct nvme_dsm_range); 623 } 624 625 static inline struct nvmet_subsys *nvmet_req_subsys(struct nvmet_req *req) 626 { 627 return req->sq->ctrl->subsys; 628 } 629 630 static inline bool nvmet_is_disc_subsys(struct nvmet_subsys *subsys) 631 { 632 return subsys->type != NVME_NQN_NVME; 633 } 634 635 #ifdef CONFIG_NVME_TARGET_PASSTHRU 636 void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys); 637 int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys); 638 void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys); 639 u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req); 640 u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req); 641 static inline bool nvmet_is_passthru_subsys(struct nvmet_subsys *subsys) 642 { 643 return subsys->passthru_ctrl; 644 } 645 #else /* CONFIG_NVME_TARGET_PASSTHRU */ 646 static inline void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys) 647 { 648 } 649 static inline void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys) 650 { 651 } 652 static inline u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req) 653 { 654 return 0; 655 } 656 static inline u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req) 657 { 658 return 0; 659 } 660 static inline bool nvmet_is_passthru_subsys(struct nvmet_subsys *subsys) 661 { 662 return NULL; 663 } 664 #endif /* CONFIG_NVME_TARGET_PASSTHRU */ 665 666 static inline bool nvmet_is_passthru_req(struct nvmet_req *req) 667 { 668 return nvmet_is_passthru_subsys(nvmet_req_subsys(req)); 669 } 670 671 void nvmet_passthrough_override_cap(struct nvmet_ctrl *ctrl); 672 673 u16 errno_to_nvme_status(struct nvmet_req *req, int errno); 674 u16 nvmet_report_invalid_opcode(struct nvmet_req *req); 675 676 /* Convert a 32-bit number to a 16-bit 0's based number */ 677 static inline __le16 to0based(u32 a) 678 { 679 return cpu_to_le16(max(1U, min(1U << 16, a)) - 1); 680 } 681 682 static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns) 683 { 684 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) 685 return false; 686 return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple); 687 } 688 689 static inline __le64 nvmet_sect_to_lba(struct nvmet_ns *ns, sector_t sect) 690 { 691 return cpu_to_le64(sect >> (ns->blksize_shift - SECTOR_SHIFT)); 692 } 693 694 static inline sector_t nvmet_lba_to_sect(struct nvmet_ns *ns, __le64 lba) 695 { 696 return le64_to_cpu(lba) << (ns->blksize_shift - SECTOR_SHIFT); 697 } 698 699 static inline bool nvmet_use_inline_bvec(struct nvmet_req *req) 700 { 701 return req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN && 702 req->sg_cnt <= NVMET_MAX_INLINE_BIOVEC; 703 } 704 705 static inline void nvmet_req_bio_put(struct nvmet_req *req, struct bio *bio) 706 { 707 if (bio != &req->b.inline_bio) 708 bio_put(bio); 709 } 710 711 #ifdef CONFIG_NVME_TARGET_AUTH 712 void nvmet_execute_auth_send(struct nvmet_req *req); 713 void nvmet_execute_auth_receive(struct nvmet_req *req); 714 int nvmet_auth_set_key(struct nvmet_host *host, const char *secret, 715 bool set_ctrl); 716 int nvmet_auth_set_host_hash(struct nvmet_host *host, const char *hash); 717 u8 nvmet_setup_auth(struct nvmet_ctrl *ctrl); 718 void nvmet_auth_sq_init(struct nvmet_sq *sq); 719 void nvmet_destroy_auth(struct nvmet_ctrl *ctrl); 720 void nvmet_auth_sq_free(struct nvmet_sq *sq); 721 int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id); 722 bool nvmet_check_auth_status(struct nvmet_req *req); 723 int nvmet_auth_host_hash(struct nvmet_req *req, u8 *response, 724 unsigned int hash_len); 725 int nvmet_auth_ctrl_hash(struct nvmet_req *req, u8 *response, 726 unsigned int hash_len); 727 static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) 728 { 729 return ctrl->host_key != NULL; 730 } 731 int nvmet_auth_ctrl_exponential(struct nvmet_req *req, 732 u8 *buf, int buf_size); 733 int nvmet_auth_ctrl_sesskey(struct nvmet_req *req, 734 u8 *buf, int buf_size); 735 #else 736 static inline u8 nvmet_setup_auth(struct nvmet_ctrl *ctrl) 737 { 738 return 0; 739 } 740 static inline void nvmet_auth_sq_init(struct nvmet_sq *sq) 741 { 742 } 743 static inline void nvmet_destroy_auth(struct nvmet_ctrl *ctrl) {}; 744 static inline void nvmet_auth_sq_free(struct nvmet_sq *sq) {}; 745 static inline bool nvmet_check_auth_status(struct nvmet_req *req) 746 { 747 return true; 748 } 749 static inline bool nvmet_has_auth(struct nvmet_ctrl *ctrl) 750 { 751 return false; 752 } 753 static inline const char *nvmet_dhchap_dhgroup_name(u8 dhgid) { return NULL; } 754 #endif 755 756 #endif /* _NVMET_H */ 757