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