1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2017 Intel Corporation. 3 * All rights reserved. 4 */ 5 6 #ifndef SPDK_VHOST_INTERNAL_H 7 #define SPDK_VHOST_INTERNAL_H 8 #include <linux/virtio_config.h> 9 10 #include "spdk/stdinc.h" 11 12 #include <rte_vhost.h> 13 14 #include "spdk_internal/vhost_user.h" 15 #include "spdk/bdev.h" 16 #include "spdk/log.h" 17 #include "spdk/util.h" 18 #include "spdk/rpc.h" 19 #include "spdk/config.h" 20 21 #define SPDK_VHOST_MAX_VQUEUES 256 22 #define SPDK_VHOST_MAX_VQ_SIZE 1024 23 24 #define SPDK_VHOST_SCSI_CTRLR_MAX_DEVS 8 25 26 #define SPDK_VHOST_IOVS_MAX 129 27 28 #define SPDK_VHOST_VQ_MAX_SUBMISSIONS 32 29 30 /* 31 * Rate at which stats are checked for interrupt coalescing. 32 */ 33 #define SPDK_VHOST_STATS_CHECK_INTERVAL_MS 10 34 /* 35 * Default threshold at which interrupts start to be coalesced. 36 */ 37 #define SPDK_VHOST_VQ_IOPS_COALESCING_THRESHOLD 60000 38 39 /* 40 * Currently coalescing is not used by default. 41 * Setting this to value > 0 here or by RPC will enable coalescing. 42 */ 43 #define SPDK_VHOST_COALESCING_DELAY_BASE_US 0 44 45 #define SPDK_VHOST_FEATURES ((1ULL << VHOST_F_LOG_ALL) | \ 46 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \ 47 (1ULL << VIRTIO_F_VERSION_1) | \ 48 (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \ 49 (1ULL << VIRTIO_RING_F_EVENT_IDX) | \ 50 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \ 51 (1ULL << VIRTIO_F_ANY_LAYOUT)) 52 53 #define SPDK_VHOST_DISABLED_FEATURES ((1ULL << VIRTIO_RING_F_EVENT_IDX) | \ 54 (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY)) 55 56 #define VRING_DESC_F_AVAIL (1ULL << VRING_PACKED_DESC_F_AVAIL) 57 #define VRING_DESC_F_USED (1ULL << VRING_PACKED_DESC_F_USED) 58 #define VRING_DESC_F_AVAIL_USED (VRING_DESC_F_AVAIL | VRING_DESC_F_USED) 59 60 typedef struct rte_vhost_resubmit_desc spdk_vhost_resubmit_desc; 61 typedef struct rte_vhost_resubmit_info spdk_vhost_resubmit_info; 62 typedef struct rte_vhost_inflight_desc_packed spdk_vhost_inflight_desc; 63 64 struct spdk_vhost_virtqueue { 65 struct rte_vhost_vring vring; 66 struct rte_vhost_ring_inflight vring_inflight; 67 uint16_t last_avail_idx; 68 uint16_t last_used_idx; 69 70 struct { 71 /* To mark a descriptor as available in packed ring 72 * Equal to avail_wrap_counter in spec. 73 */ 74 uint8_t avail_phase : 1; 75 /* To mark a descriptor as used in packed ring 76 * Equal to used_wrap_counter in spec. 77 */ 78 uint8_t used_phase : 1; 79 uint8_t padding : 5; 80 bool packed_ring : 1; 81 } packed; 82 83 void *tasks; 84 85 /* Request count from last stats check */ 86 uint32_t req_cnt; 87 88 /* Request count from last event */ 89 uint16_t used_req_cnt; 90 91 /* How long interrupt is delayed */ 92 uint32_t irq_delay_time; 93 94 /* Next time when we need to send event */ 95 uint64_t next_event_time; 96 97 /* Associated vhost_virtqueue in the virtio device's virtqueue list */ 98 uint32_t vring_idx; 99 100 struct spdk_vhost_session *vsession; 101 102 struct spdk_interrupt *intr; 103 } __attribute((aligned(SPDK_CACHE_LINE_SIZE))); 104 105 struct spdk_vhost_session { 106 struct spdk_vhost_dev *vdev; 107 108 /* rte_vhost connection ID. */ 109 int vid; 110 111 /* Unique session ID. */ 112 uint64_t id; 113 /* Unique session name. */ 114 char *name; 115 116 bool started; 117 bool interrupt_mode; 118 119 struct rte_vhost_memory *mem; 120 121 int task_cnt; 122 123 uint16_t max_queues; 124 125 uint64_t negotiated_features; 126 127 /* Local copy of device coalescing settings. */ 128 uint32_t coalescing_delay_time_base; 129 uint32_t coalescing_io_rate_threshold; 130 131 /* Next time when stats for event coalescing will be checked. */ 132 uint64_t next_stats_check_time; 133 134 /* Interval used for event coalescing checking. */ 135 uint64_t stats_check_interval; 136 137 /* Session's stop poller will only try limited times to destroy the session. */ 138 uint32_t stop_retry_count; 139 140 struct spdk_vhost_virtqueue virtqueue[SPDK_VHOST_MAX_VQUEUES]; 141 142 TAILQ_ENTRY(spdk_vhost_session) tailq; 143 }; 144 145 struct spdk_vhost_user_dev { 146 struct spdk_vhost_dev *vdev; 147 148 const struct spdk_vhost_user_dev_backend *user_backend; 149 150 /* Saved original values used to setup coalescing to avoid integer 151 * rounding issues during save/load config. 152 */ 153 uint32_t coalescing_delay_us; 154 uint32_t coalescing_iops_threshold; 155 156 bool registered; 157 158 /* Use this lock to protect multiple sessions. */ 159 pthread_mutex_t lock; 160 161 /* Current connections to the device */ 162 TAILQ_HEAD(, spdk_vhost_session) vsessions; 163 164 /* Increment-only session counter */ 165 uint64_t vsessions_num; 166 167 /* Number of pending asynchronous operations */ 168 uint32_t pending_async_op_num; 169 }; 170 171 struct spdk_vhost_dev { 172 char *name; 173 char *path; 174 175 struct spdk_thread *thread; 176 177 uint64_t virtio_features; 178 uint64_t disabled_features; 179 uint64_t protocol_features; 180 181 const struct spdk_vhost_dev_backend *backend; 182 183 /* Context passed from transport */ 184 void *ctxt; 185 186 TAILQ_ENTRY(spdk_vhost_dev) tailq; 187 }; 188 189 static inline struct spdk_vhost_user_dev * 190 to_user_dev(struct spdk_vhost_dev *vdev) 191 { 192 assert(vdev != NULL); 193 return vdev->ctxt; 194 } 195 196 /** 197 * \param vdev vhost device. 198 * \param vsession vhost session. 199 * \param arg user-provided parameter. 200 * 201 * \return negative values will break the foreach call, meaning 202 * the function won't be called again. Return codes zero and 203 * positive don't have any effect. 204 */ 205 typedef int (*spdk_vhost_session_fn)(struct spdk_vhost_dev *vdev, 206 struct spdk_vhost_session *vsession, 207 void *arg); 208 209 /** 210 * \param vdev vhost device. 211 * \param arg user-provided parameter. 212 */ 213 typedef void (*spdk_vhost_dev_fn)(struct spdk_vhost_dev *vdev, void *arg); 214 215 struct spdk_vhost_user_dev_backend { 216 /** 217 * Size of additional per-session context data 218 * allocated whenever a new client connects. 219 */ 220 size_t session_ctx_size; 221 222 spdk_vhost_session_fn start_session; 223 spdk_vhost_session_fn stop_session; 224 int (*alloc_vq_tasks)(struct spdk_vhost_session *vsession, uint16_t qid); 225 void (*register_vq_interrupt)(struct spdk_vhost_session *vsession, struct spdk_vhost_virtqueue *vq); 226 }; 227 228 enum vhost_backend_type { 229 VHOST_BACKEND_BLK = 0, 230 VHOST_BACKEND_SCSI, 231 }; 232 233 struct spdk_vhost_dev_backend { 234 enum vhost_backend_type type; 235 236 int (*vhost_get_config)(struct spdk_vhost_dev *vdev, uint8_t *config, uint32_t len); 237 int (*vhost_set_config)(struct spdk_vhost_dev *vdev, uint8_t *config, 238 uint32_t offset, uint32_t size, uint32_t flags); 239 240 void (*dump_info_json)(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w); 241 void (*write_config_json)(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w); 242 int (*remove_device)(struct spdk_vhost_dev *vdev); 243 int (*set_coalescing)(struct spdk_vhost_dev *vdev, uint32_t delay_base_us, 244 uint32_t iops_threshold); 245 void (*get_coalescing)(struct spdk_vhost_dev *vdev, uint32_t *delay_base_us, 246 uint32_t *iops_threshold); 247 }; 248 249 void *vhost_gpa_to_vva(struct spdk_vhost_session *vsession, uint64_t addr, uint64_t len); 250 251 uint16_t vhost_vq_avail_ring_get(struct spdk_vhost_virtqueue *vq, uint16_t *reqs, 252 uint16_t reqs_len); 253 254 /** 255 * Get a virtio split descriptor at given index in given virtqueue. 256 * The descriptor will provide access to the entire descriptor 257 * chain. The subsequent descriptors are accessible via 258 * \c spdk_vhost_vring_desc_get_next. 259 * \param vsession vhost session 260 * \param vq virtqueue 261 * \param req_idx descriptor index 262 * \param desc pointer to be set to the descriptor 263 * \param desc_table descriptor table to be used with 264 * \c spdk_vhost_vring_desc_get_next. This might be either 265 * default virtqueue descriptor table or per-chain indirect 266 * table. 267 * \param desc_table_size size of the *desc_table* 268 * \return 0 on success, -1 if given index is invalid. 269 * If -1 is returned, the content of params is undefined. 270 */ 271 int vhost_vq_get_desc(struct spdk_vhost_session *vsession, struct spdk_vhost_virtqueue *vq, 272 uint16_t req_idx, struct vring_desc **desc, struct vring_desc **desc_table, 273 uint32_t *desc_table_size); 274 275 /** 276 * Get a virtio packed descriptor at given index in given virtqueue. 277 * The descriptor will provide access to the entire descriptor 278 * chain. The subsequent descriptors are accessible via 279 * \c vhost_vring_packed_desc_get_next. 280 * \param vsession vhost session 281 * \param vq virtqueue 282 * \param req_idx descriptor index 283 * \param desc pointer to be set to the descriptor 284 * \param desc_table descriptor table to be used with 285 * \c spdk_vhost_vring_desc_get_next. This might be either 286 * \c NULL or per-chain indirect table. 287 * \param desc_table_size size of the *desc_table* 288 * \return 0 on success, -1 if given index is invalid. 289 * If -1 is returned, the content of params is undefined. 290 */ 291 int vhost_vq_get_desc_packed(struct spdk_vhost_session *vsession, 292 struct spdk_vhost_virtqueue *virtqueue, 293 uint16_t req_idx, struct vring_packed_desc **desc, 294 struct vring_packed_desc **desc_table, uint32_t *desc_table_size); 295 296 int vhost_inflight_queue_get_desc(struct spdk_vhost_session *vsession, 297 spdk_vhost_inflight_desc *desc_array, 298 uint16_t req_idx, spdk_vhost_inflight_desc **desc, 299 struct vring_packed_desc **desc_table, uint32_t *desc_table_size); 300 301 /** 302 * Send IRQ/call client (if pending) for \c vq. 303 * \param vsession vhost session 304 * \param vq virtqueue 305 * \return 306 * 0 - if no interrupt was signalled 307 * 1 - if interrupt was signalled 308 */ 309 int vhost_vq_used_signal(struct spdk_vhost_session *vsession, struct spdk_vhost_virtqueue *vq); 310 311 /** 312 * Send IRQs for the queue that need to be signaled. 313 * \param vq virtqueue 314 */ 315 void vhost_session_vq_used_signal(struct spdk_vhost_virtqueue *virtqueue); 316 317 void vhost_vq_used_ring_enqueue(struct spdk_vhost_session *vsession, 318 struct spdk_vhost_virtqueue *vq, 319 uint16_t id, uint32_t len); 320 321 /** 322 * Enqueue the entry to the used ring when device complete the request. 323 * \param vsession vhost session 324 * \param vq virtqueue 325 * \req_idx descriptor index. It's the first index of this descriptor chain. 326 * \num_descs descriptor count. It's the count of the number of buffers in the chain. 327 * \buffer_id descriptor buffer ID. 328 * \length device write length. Specify the length of the buffer that has been initialized 329 * (written to) by the device 330 * \inflight_head the head idx of this IO inflight desc chain. 331 */ 332 void vhost_vq_packed_ring_enqueue(struct spdk_vhost_session *vsession, 333 struct spdk_vhost_virtqueue *virtqueue, 334 uint16_t num_descs, uint16_t buffer_id, 335 uint32_t length, uint16_t inflight_head); 336 337 /** 338 * Get subsequent descriptor from given table. 339 * \param desc current descriptor, will be set to the 340 * next descriptor (NULL in case this is the last 341 * descriptor in the chain or the next desc is invalid) 342 * \param desc_table descriptor table 343 * \param desc_table_size size of the *desc_table* 344 * \return 0 on success, -1 if given index is invalid 345 * The *desc* param will be set regardless of the 346 * return value. 347 */ 348 int vhost_vring_desc_get_next(struct vring_desc **desc, 349 struct vring_desc *desc_table, uint32_t desc_table_size); 350 static inline bool 351 vhost_vring_desc_is_wr(struct vring_desc *cur_desc) 352 { 353 return !!(cur_desc->flags & VRING_DESC_F_WRITE); 354 } 355 356 int vhost_vring_desc_to_iov(struct spdk_vhost_session *vsession, struct iovec *iov, 357 uint16_t *iov_index, const struct vring_desc *desc); 358 359 bool vhost_vq_packed_ring_is_avail(struct spdk_vhost_virtqueue *virtqueue); 360 361 /** 362 * Get subsequent descriptor from vq or desc table. 363 * \param desc current descriptor, will be set to the 364 * next descriptor (NULL in case this is the last 365 * descriptor in the chain or the next desc is invalid) 366 * \req_idx index of current desc, will be set to the next 367 * index. If desc_table != NULL the req_idx is the the vring index 368 * or the req_idx is the desc_table index. 369 * \param desc_table descriptor table 370 * \param desc_table_size size of the *desc_table* 371 * \return 0 on success, -1 if given index is invalid 372 * The *desc* param will be set regardless of the 373 * return value. 374 */ 375 int vhost_vring_packed_desc_get_next(struct vring_packed_desc **desc, uint16_t *req_idx, 376 struct spdk_vhost_virtqueue *vq, 377 struct vring_packed_desc *desc_table, 378 uint32_t desc_table_size); 379 380 bool vhost_vring_packed_desc_is_wr(struct vring_packed_desc *cur_desc); 381 382 int vhost_vring_packed_desc_to_iov(struct spdk_vhost_session *vsession, struct iovec *iov, 383 uint16_t *iov_index, const struct vring_packed_desc *desc); 384 385 bool vhost_vring_inflight_desc_is_wr(spdk_vhost_inflight_desc *cur_desc); 386 387 int vhost_vring_inflight_desc_to_iov(struct spdk_vhost_session *vsession, struct iovec *iov, 388 uint16_t *iov_index, const spdk_vhost_inflight_desc *desc); 389 390 uint16_t vhost_vring_packed_desc_get_buffer_id(struct spdk_vhost_virtqueue *vq, uint16_t req_idx, 391 uint16_t *num_descs); 392 393 static inline bool 394 __attribute__((always_inline)) 395 vhost_dev_has_feature(struct spdk_vhost_session *vsession, unsigned feature_id) 396 { 397 return vsession->negotiated_features & (1ULL << feature_id); 398 } 399 400 int vhost_dev_register(struct spdk_vhost_dev *vdev, const char *name, const char *mask_str, 401 const struct spdk_json_val *params, 402 const struct spdk_vhost_dev_backend *backend, 403 const struct spdk_vhost_user_dev_backend *user_backend); 404 int vhost_dev_unregister(struct spdk_vhost_dev *vdev); 405 406 void vhost_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w); 407 408 /* 409 * Set vhost session to run in interrupt or poll mode 410 */ 411 void vhost_user_session_set_interrupt_mode(struct spdk_vhost_session *vsession, 412 bool interrupt_mode); 413 414 /* 415 * Memory registration functions used in start/stop device callbacks 416 */ 417 void vhost_session_mem_register(struct rte_vhost_memory *mem); 418 void vhost_session_mem_unregister(struct rte_vhost_memory *mem); 419 420 /* 421 * Call a function for each session of the provided vhost device. 422 * The function will be called one-by-one on each session's thread. 423 * 424 * \param vdev vhost device 425 * \param fn function to call on each session's thread 426 * \param cpl_fn function to be called at the end of the iteration on 427 * the vhost management thread. 428 * Optional, can be NULL. 429 * \param arg additional argument to the both callbacks 430 */ 431 void vhost_user_dev_foreach_session(struct spdk_vhost_dev *dev, 432 spdk_vhost_session_fn fn, 433 spdk_vhost_dev_fn cpl_fn, 434 void *arg); 435 436 /** 437 * Finish a blocking vhost_user_wait_for_session_stop() call and finally 438 * stop the session. This must be called on the session's lcore which 439 * used to receive all session-related messages (e.g. from 440 * vhost_user_dev_foreach_session()). After this call, the session- 441 * related messages will be once again processed by any arbitrary thread. 442 * 443 * Must be called under the vhost user device's session access lock. 444 * 445 * \param vsession vhost session 446 * \param response return code 447 */ 448 void vhost_user_session_stop_done(struct spdk_vhost_session *vsession, int response); 449 450 struct spdk_vhost_session *vhost_session_find_by_vid(int vid); 451 void vhost_session_install_rte_compat_hooks(struct spdk_vhost_session *vsession); 452 int vhost_register_unix_socket(const char *path, const char *ctrl_name, 453 uint64_t virtio_features, uint64_t disabled_features, uint64_t protocol_features); 454 int vhost_driver_unregister(const char *path); 455 int vhost_get_mem_table(int vid, struct rte_vhost_memory **mem); 456 int vhost_get_negotiated_features(int vid, uint64_t *negotiated_features); 457 458 int remove_vhost_controller(struct spdk_vhost_dev *vdev); 459 460 struct spdk_io_channel *vhost_blk_get_io_channel(struct spdk_vhost_dev *vdev); 461 void vhost_blk_put_io_channel(struct spdk_io_channel *ch); 462 463 /* The spdk_bdev pointer should only be used to retrieve 464 * the device properties, ex. number of blocks or I/O type supported. */ 465 struct spdk_bdev *vhost_blk_get_bdev(struct spdk_vhost_dev *vdev); 466 467 /* Function calls from vhost.c to rte_vhost_user.c, 468 * shall removed once virtio transport abstraction is complete. */ 469 int vhost_user_session_set_coalescing(struct spdk_vhost_dev *dev, 470 struct spdk_vhost_session *vsession, void *ctx); 471 int vhost_user_dev_set_coalescing(struct spdk_vhost_user_dev *user_dev, uint32_t delay_base_us, 472 uint32_t iops_threshold); 473 int vhost_user_dev_register(struct spdk_vhost_dev *vdev, const char *name, 474 struct spdk_cpuset *cpumask, const struct spdk_vhost_user_dev_backend *user_backend); 475 int vhost_user_dev_unregister(struct spdk_vhost_dev *vdev); 476 int vhost_user_init(void); 477 void vhost_user_fini(spdk_vhost_fini_cb vhost_cb); 478 int vhost_user_set_coalescing(struct spdk_vhost_dev *vdev, uint32_t delay_base_us, 479 uint32_t iops_threshold); 480 void vhost_user_get_coalescing(struct spdk_vhost_dev *vdev, uint32_t *delay_base_us, 481 uint32_t *iops_threshold); 482 483 int virtio_blk_construct_ctrlr(struct spdk_vhost_dev *vdev, const char *address, 484 struct spdk_cpuset *cpumask, const struct spdk_json_val *params, 485 const struct spdk_vhost_user_dev_backend *user_backend); 486 int virtio_blk_destroy_ctrlr(struct spdk_vhost_dev *vdev); 487 488 struct spdk_vhost_blk_task; 489 490 typedef void (*virtio_blk_request_cb)(uint8_t status, struct spdk_vhost_blk_task *task, 491 void *cb_arg); 492 493 struct spdk_vhost_blk_task { 494 struct spdk_bdev_io *bdev_io; 495 virtio_blk_request_cb cb; 496 void *cb_arg; 497 498 volatile uint8_t *status; 499 500 /* for io wait */ 501 struct spdk_bdev_io_wait_entry bdev_io_wait; 502 struct spdk_io_channel *bdev_io_wait_ch; 503 struct spdk_vhost_dev *bdev_io_wait_vdev; 504 505 /** Number of bytes that were written. */ 506 uint32_t used_len; 507 uint16_t iovcnt; 508 struct iovec iovs[SPDK_VHOST_IOVS_MAX]; 509 510 /** Size of whole payload in bytes */ 511 uint32_t payload_size; 512 }; 513 514 int virtio_blk_process_request(struct spdk_vhost_dev *vdev, struct spdk_io_channel *ch, 515 struct spdk_vhost_blk_task *task, virtio_blk_request_cb cb, void *cb_arg); 516 517 typedef void (*bdev_event_cb_complete)(struct spdk_vhost_dev *vdev, void *ctx); 518 519 #define SPDK_VIRTIO_BLK_TRSTRING_MAX_LEN 32 520 521 struct spdk_virtio_blk_transport_ops { 522 /** 523 * Transport name 524 */ 525 char name[SPDK_VIRTIO_BLK_TRSTRING_MAX_LEN]; 526 527 /** 528 * Create a transport for the given transport opts 529 */ 530 struct spdk_virtio_blk_transport *(*create)(const struct spdk_json_val *params); 531 532 /** 533 * Dump transport-specific opts into JSON 534 */ 535 void (*dump_opts)(struct spdk_virtio_blk_transport *transport, struct spdk_json_write_ctx *w); 536 537 /** 538 * Destroy the transport 539 */ 540 int (*destroy)(struct spdk_virtio_blk_transport *transport, 541 spdk_vhost_fini_cb cb_fn); 542 543 /** 544 * Create vhost block controller 545 */ 546 int (*create_ctrlr)(struct spdk_vhost_dev *vdev, struct spdk_cpuset *cpumask, 547 const char *address, const struct spdk_json_val *params, 548 void *custom_opts); 549 550 /** 551 * Destroy vhost block controller 552 */ 553 int (*destroy_ctrlr)(struct spdk_vhost_dev *vdev); 554 555 /* 556 * Signal removal of the bdev. 557 */ 558 void (*bdev_event)(enum spdk_bdev_event_type type, struct spdk_vhost_dev *vdev, 559 bdev_event_cb_complete cb, void *cb_arg); 560 561 /** 562 * Set coalescing parameters. 563 */ 564 int (*set_coalescing)(struct spdk_vhost_dev *vdev, uint32_t delay_base_us, 565 uint32_t iops_threshold); 566 567 /** 568 * Get coalescing parameters. 569 */ 570 void (*get_coalescing)(struct spdk_vhost_dev *vdev, uint32_t *delay_base_us, 571 uint32_t *iops_threshold); 572 }; 573 574 struct spdk_virtio_blk_transport { 575 const struct spdk_virtio_blk_transport_ops *ops; 576 TAILQ_ENTRY(spdk_virtio_blk_transport) tailq; 577 }; 578 579 struct virtio_blk_transport_ops_list_element { 580 struct spdk_virtio_blk_transport_ops ops; 581 TAILQ_ENTRY(virtio_blk_transport_ops_list_element) link; 582 }; 583 584 void virtio_blk_transport_register(const struct spdk_virtio_blk_transport_ops *ops); 585 int virtio_blk_transport_create(const char *transport_name, const struct spdk_json_val *params); 586 int virtio_blk_transport_destroy(struct spdk_virtio_blk_transport *transport, 587 spdk_vhost_fini_cb cb_fn); 588 struct spdk_virtio_blk_transport *virtio_blk_transport_get_first(void); 589 struct spdk_virtio_blk_transport *virtio_blk_transport_get_next( 590 struct spdk_virtio_blk_transport *transport); 591 void virtio_blk_transport_dump_opts(struct spdk_virtio_blk_transport *transport, 592 struct spdk_json_write_ctx *w); 593 struct spdk_virtio_blk_transport *virtio_blk_tgt_get_transport(const char *transport_name); 594 const struct spdk_virtio_blk_transport_ops *virtio_blk_get_transport_ops( 595 const char *transport_name); 596 597 void vhost_session_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w); 598 599 /* 600 * Macro used to register new transports. 601 */ 602 #define SPDK_VIRTIO_BLK_TRANSPORT_REGISTER(name, transport_ops) \ 603 static void __attribute__((constructor)) _virtio_blk_transport_register_##name(void) \ 604 { \ 605 virtio_blk_transport_register(transport_ops); \ 606 } 607 608 #endif /* SPDK_VHOST_INTERNAL_H */ 609