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
31 /*
32 * Supported optional AENs:
33 */
34 #define NVMET_AEN_CFG_OPTIONAL \
35 (NVME_AEN_CFG_NS_ATTR | NVME_AEN_CFG_ANA_CHANGE)
36 #define NVMET_DISC_AEN_CFG_OPTIONAL \
37 (NVME_AEN_CFG_DISC_CHANGE)
38
39 /*
40 * Plus mandatory SMART AENs (we'll never send them, but allow enabling them):
41 */
42 #define NVMET_AEN_CFG_ALL \
43 (NVME_SMART_CRIT_SPARE | NVME_SMART_CRIT_TEMPERATURE | \
44 NVME_SMART_CRIT_RELIABILITY | NVME_SMART_CRIT_MEDIA | \
45 NVME_SMART_CRIT_VOLATILE_MEMORY | NVMET_AEN_CFG_OPTIONAL)
46
47 /* Helper Macros when NVMe error is NVME_SC_CONNECT_INVALID_PARAM
48 * The 16 bit shift is to set IATTR bit to 1, which means offending
49 * offset starts in the data section of connect()
50 */
51 #define IPO_IATTR_CONNECT_DATA(x) \
52 (cpu_to_le32((1 << 16) | (offsetof(struct nvmf_connect_data, x))))
53 #define IPO_IATTR_CONNECT_SQE(x) \
54 (cpu_to_le32(offsetof(struct nvmf_connect_command, x)))
55
56 struct nvmet_ns {
57 struct percpu_ref ref;
58 struct block_device *bdev;
59 struct file *file;
60 bool readonly;
61 u32 nsid;
62 u32 blksize_shift;
63 loff_t size;
64 u8 nguid[16];
65 uuid_t uuid;
66 u32 anagrpid;
67
68 bool buffered_io;
69 bool enabled;
70 struct nvmet_subsys *subsys;
71 const char *device_path;
72
73 struct config_group device_group;
74 struct config_group group;
75
76 struct completion disable_done;
77 mempool_t *bvec_pool;
78 struct kmem_cache *bvec_cache;
79
80 int use_p2pmem;
81 struct pci_dev *p2p_dev;
82 int pi_type;
83 int metadata_size;
84 };
85
to_nvmet_ns(struct config_item * item)86 static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item)
87 {
88 return container_of(to_config_group(item), struct nvmet_ns, group);
89 }
90
nvmet_ns_dev(struct nvmet_ns * ns)91 static inline struct device *nvmet_ns_dev(struct nvmet_ns *ns)
92 {
93 return ns->bdev ? disk_to_dev(ns->bdev->bd_disk) : NULL;
94 }
95
96 struct nvmet_cq {
97 u16 qid;
98 u16 size;
99 };
100
101 struct nvmet_sq {
102 struct nvmet_ctrl *ctrl;
103 struct percpu_ref ref;
104 u16 qid;
105 u16 size;
106 u32 sqhd;
107 bool sqhd_disabled;
108 struct completion free_done;
109 struct completion confirm_done;
110 };
111
112 struct nvmet_ana_group {
113 struct config_group group;
114 struct nvmet_port *port;
115 u32 grpid;
116 };
117
to_ana_group(struct config_item * item)118 static inline struct nvmet_ana_group *to_ana_group(struct config_item *item)
119 {
120 return container_of(to_config_group(item), struct nvmet_ana_group,
121 group);
122 }
123
124 /**
125 * struct nvmet_port - Common structure to keep port
126 * information for the target.
127 * @entry: Entry into referrals or transport list.
128 * @disc_addr: Address information is stored in a format defined
129 * for a discovery log page entry.
130 * @group: ConfigFS group for this element's folder.
131 * @priv: Private data for the transport.
132 */
133 struct nvmet_port {
134 struct list_head entry;
135 struct nvmf_disc_rsp_page_entry disc_addr;
136 struct config_group group;
137 struct config_group subsys_group;
138 struct list_head subsystems;
139 struct config_group referrals_group;
140 struct list_head referrals;
141 struct list_head global_entry;
142 struct config_group ana_groups_group;
143 struct nvmet_ana_group ana_default_group;
144 enum nvme_ana_state *ana_state;
145 void *priv;
146 bool enabled;
147 int inline_data_size;
148 const struct nvmet_fabrics_ops *tr_ops;
149 bool pi_enable;
150 };
151
to_nvmet_port(struct config_item * item)152 static inline struct nvmet_port *to_nvmet_port(struct config_item *item)
153 {
154 return container_of(to_config_group(item), struct nvmet_port,
155 group);
156 }
157
ana_groups_to_port(struct config_item * item)158 static inline struct nvmet_port *ana_groups_to_port(
159 struct config_item *item)
160 {
161 return container_of(to_config_group(item), struct nvmet_port,
162 ana_groups_group);
163 }
164
165 struct nvmet_ctrl {
166 struct nvmet_subsys *subsys;
167 struct nvmet_sq **sqs;
168
169 bool reset_tbkas;
170
171 struct mutex lock;
172 u64 cap;
173 u32 cc;
174 u32 csts;
175
176 uuid_t hostid;
177 u16 cntlid;
178 u32 kato;
179
180 struct nvmet_port *port;
181
182 u32 aen_enabled;
183 unsigned long aen_masked;
184 struct nvmet_req *async_event_cmds[NVMET_ASYNC_EVENTS];
185 unsigned int nr_async_event_cmds;
186 struct list_head async_events;
187 struct work_struct async_event_work;
188
189 struct list_head subsys_entry;
190 struct kref ref;
191 struct delayed_work ka_work;
192 struct work_struct fatal_err_work;
193
194 const struct nvmet_fabrics_ops *ops;
195
196 __le32 *changed_ns_list;
197 u32 nr_changed_ns;
198
199 char subsysnqn[NVMF_NQN_FIELD_LEN];
200 char hostnqn[NVMF_NQN_FIELD_LEN];
201
202 struct device *p2p_client;
203 struct radix_tree_root p2p_ns_map;
204
205 spinlock_t error_lock;
206 u64 err_counter;
207 struct nvme_error_slot slots[NVMET_ERROR_LOG_SLOTS];
208 bool pi_support;
209 };
210
211 struct nvmet_subsys_model {
212 struct rcu_head rcuhead;
213 char number[];
214 };
215
216 struct nvmet_subsys {
217 enum nvme_subsys_type type;
218
219 struct mutex lock;
220 struct kref ref;
221
222 struct xarray namespaces;
223 unsigned int nr_namespaces;
224 unsigned int max_nsid;
225 u16 cntlid_min;
226 u16 cntlid_max;
227
228 struct list_head ctrls;
229
230 struct list_head hosts;
231 bool allow_any_host;
232
233 u16 max_qid;
234
235 u64 ver;
236 u64 serial;
237 char *subsysnqn;
238 bool pi_support;
239
240 struct config_group group;
241
242 struct config_group namespaces_group;
243 struct config_group allowed_hosts_group;
244
245 struct nvmet_subsys_model __rcu *model;
246
247 #ifdef CONFIG_NVME_TARGET_PASSTHRU
248 struct nvme_ctrl *passthru_ctrl;
249 char *passthru_ctrl_path;
250 struct config_group passthru_group;
251 #endif /* CONFIG_NVME_TARGET_PASSTHRU */
252 };
253
to_subsys(struct config_item * item)254 static inline struct nvmet_subsys *to_subsys(struct config_item *item)
255 {
256 return container_of(to_config_group(item), struct nvmet_subsys, group);
257 }
258
namespaces_to_subsys(struct config_item * item)259 static inline struct nvmet_subsys *namespaces_to_subsys(
260 struct config_item *item)
261 {
262 return container_of(to_config_group(item), struct nvmet_subsys,
263 namespaces_group);
264 }
265
266 struct nvmet_host {
267 struct config_group group;
268 };
269
to_host(struct config_item * item)270 static inline struct nvmet_host *to_host(struct config_item *item)
271 {
272 return container_of(to_config_group(item), struct nvmet_host, group);
273 }
274
nvmet_host_name(struct nvmet_host * host)275 static inline char *nvmet_host_name(struct nvmet_host *host)
276 {
277 return config_item_name(&host->group.cg_item);
278 }
279
280 struct nvmet_host_link {
281 struct list_head entry;
282 struct nvmet_host *host;
283 };
284
285 struct nvmet_subsys_link {
286 struct list_head entry;
287 struct nvmet_subsys *subsys;
288 };
289
290 struct nvmet_req;
291 struct nvmet_fabrics_ops {
292 struct module *owner;
293 unsigned int type;
294 unsigned int msdbd;
295 unsigned int flags;
296 #define NVMF_KEYED_SGLS (1 << 0)
297 #define NVMF_METADATA_SUPPORTED (1 << 1)
298 void (*queue_response)(struct nvmet_req *req);
299 int (*add_port)(struct nvmet_port *port);
300 void (*remove_port)(struct nvmet_port *port);
301 void (*delete_ctrl)(struct nvmet_ctrl *ctrl);
302 void (*disc_traddr)(struct nvmet_req *req,
303 struct nvmet_port *port, char *traddr);
304 u16 (*install_queue)(struct nvmet_sq *nvme_sq);
305 void (*discovery_chg)(struct nvmet_port *port);
306 u8 (*get_mdts)(const struct nvmet_ctrl *ctrl);
307 };
308
309 #define NVMET_MAX_INLINE_BIOVEC 8
310 #define NVMET_MAX_INLINE_DATA_LEN NVMET_MAX_INLINE_BIOVEC * PAGE_SIZE
311
312 struct nvmet_req {
313 struct nvme_command *cmd;
314 struct nvme_completion *cqe;
315 struct nvmet_sq *sq;
316 struct nvmet_cq *cq;
317 struct nvmet_ns *ns;
318 struct scatterlist *sg;
319 struct scatterlist *metadata_sg;
320 struct bio_vec inline_bvec[NVMET_MAX_INLINE_BIOVEC];
321 union {
322 struct {
323 struct bio inline_bio;
324 } b;
325 struct {
326 bool mpool_alloc;
327 struct kiocb iocb;
328 struct bio_vec *bvec;
329 struct work_struct work;
330 } f;
331 struct {
332 struct request *rq;
333 struct work_struct work;
334 bool use_workqueue;
335 } p;
336 };
337 int sg_cnt;
338 int metadata_sg_cnt;
339 /* data length as parsed from the SGL descriptor: */
340 size_t transfer_len;
341 size_t metadata_len;
342
343 struct nvmet_port *port;
344
345 void (*execute)(struct nvmet_req *req);
346 const struct nvmet_fabrics_ops *ops;
347
348 struct pci_dev *p2p_dev;
349 struct device *p2p_client;
350 u16 error_loc;
351 u64 error_slba;
352 };
353
354 extern struct workqueue_struct *buffered_io_wq;
355
nvmet_set_result(struct nvmet_req * req,u32 result)356 static inline void nvmet_set_result(struct nvmet_req *req, u32 result)
357 {
358 req->cqe->result.u32 = cpu_to_le32(result);
359 }
360
361 /*
362 * NVMe command writes actually are DMA reads for us on the target side.
363 */
364 static inline enum dma_data_direction
nvmet_data_dir(struct nvmet_req * req)365 nvmet_data_dir(struct nvmet_req *req)
366 {
367 return nvme_is_write(req->cmd) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
368 }
369
370 struct nvmet_async_event {
371 struct list_head entry;
372 u8 event_type;
373 u8 event_info;
374 u8 log_page;
375 };
376
nvmet_clear_aen_bit(struct nvmet_req * req,u32 bn)377 static inline void nvmet_clear_aen_bit(struct nvmet_req *req, u32 bn)
378 {
379 int rae = le32_to_cpu(req->cmd->common.cdw10) & 1 << 15;
380
381 if (!rae)
382 clear_bit(bn, &req->sq->ctrl->aen_masked);
383 }
384
nvmet_aen_bit_disabled(struct nvmet_ctrl * ctrl,u32 bn)385 static inline bool nvmet_aen_bit_disabled(struct nvmet_ctrl *ctrl, u32 bn)
386 {
387 if (!(READ_ONCE(ctrl->aen_enabled) & (1 << bn)))
388 return true;
389 return test_and_set_bit(bn, &ctrl->aen_masked);
390 }
391
392 void nvmet_get_feat_kato(struct nvmet_req *req);
393 void nvmet_get_feat_async_event(struct nvmet_req *req);
394 u16 nvmet_set_feat_kato(struct nvmet_req *req);
395 u16 nvmet_set_feat_async_event(struct nvmet_req *req, u32 mask);
396 void nvmet_execute_async_event(struct nvmet_req *req);
397 void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl);
398 void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl);
399
400 u16 nvmet_parse_connect_cmd(struct nvmet_req *req);
401 void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id);
402 u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req);
403 u16 nvmet_file_parse_io_cmd(struct nvmet_req *req);
404 u16 nvmet_parse_admin_cmd(struct nvmet_req *req);
405 u16 nvmet_parse_discovery_cmd(struct nvmet_req *req);
406 u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req);
407
408 bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
409 struct nvmet_sq *sq, const struct nvmet_fabrics_ops *ops);
410 void nvmet_req_uninit(struct nvmet_req *req);
411 bool nvmet_check_transfer_len(struct nvmet_req *req, size_t len);
412 bool nvmet_check_data_len_lte(struct nvmet_req *req, size_t data_len);
413 void nvmet_req_complete(struct nvmet_req *req, u16 status);
414 int nvmet_req_alloc_sgls(struct nvmet_req *req);
415 void nvmet_req_free_sgls(struct nvmet_req *req);
416
417 void nvmet_execute_set_features(struct nvmet_req *req);
418 void nvmet_execute_get_features(struct nvmet_req *req);
419 void nvmet_execute_keep_alive(struct nvmet_req *req);
420
421 void nvmet_cq_setup(struct nvmet_ctrl *ctrl, struct nvmet_cq *cq, u16 qid,
422 u16 size);
423 void nvmet_sq_setup(struct nvmet_ctrl *ctrl, struct nvmet_sq *sq, u16 qid,
424 u16 size);
425 void nvmet_sq_destroy(struct nvmet_sq *sq);
426 int nvmet_sq_init(struct nvmet_sq *sq);
427
428 void nvmet_ctrl_fatal_error(struct nvmet_ctrl *ctrl);
429
430 void nvmet_update_cc(struct nvmet_ctrl *ctrl, u32 new);
431 u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn,
432 struct nvmet_req *req, u32 kato, struct nvmet_ctrl **ctrlp);
433 u16 nvmet_ctrl_find_get(const char *subsysnqn, const char *hostnqn, u16 cntlid,
434 struct nvmet_req *req, struct nvmet_ctrl **ret);
435 void nvmet_ctrl_put(struct nvmet_ctrl *ctrl);
436 u16 nvmet_check_ctrl_status(struct nvmet_req *req, struct nvme_command *cmd);
437
438 struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
439 enum nvme_subsys_type type);
440 void nvmet_subsys_put(struct nvmet_subsys *subsys);
441 void nvmet_subsys_del_ctrls(struct nvmet_subsys *subsys);
442
443 struct nvmet_ns *nvmet_find_namespace(struct nvmet_ctrl *ctrl, __le32 nsid);
444 void nvmet_put_namespace(struct nvmet_ns *ns);
445 int nvmet_ns_enable(struct nvmet_ns *ns);
446 void nvmet_ns_disable(struct nvmet_ns *ns);
447 struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid);
448 void nvmet_ns_free(struct nvmet_ns *ns);
449
450 void nvmet_send_ana_event(struct nvmet_subsys *subsys,
451 struct nvmet_port *port);
452 void nvmet_port_send_ana_event(struct nvmet_port *port);
453
454 int nvmet_register_transport(const struct nvmet_fabrics_ops *ops);
455 void nvmet_unregister_transport(const struct nvmet_fabrics_ops *ops);
456
457 void nvmet_port_del_ctrls(struct nvmet_port *port,
458 struct nvmet_subsys *subsys);
459
460 int nvmet_enable_port(struct nvmet_port *port);
461 void nvmet_disable_port(struct nvmet_port *port);
462
463 void nvmet_referral_enable(struct nvmet_port *parent, struct nvmet_port *port);
464 void nvmet_referral_disable(struct nvmet_port *parent, struct nvmet_port *port);
465
466 u16 nvmet_copy_to_sgl(struct nvmet_req *req, off_t off, const void *buf,
467 size_t len);
468 u16 nvmet_copy_from_sgl(struct nvmet_req *req, off_t off, void *buf,
469 size_t len);
470 u16 nvmet_zero_sgl(struct nvmet_req *req, off_t off, size_t len);
471
472 u32 nvmet_get_log_page_len(struct nvme_command *cmd);
473 u64 nvmet_get_log_page_offset(struct nvme_command *cmd);
474
475 extern struct list_head *nvmet_ports;
476 void nvmet_port_disc_changed(struct nvmet_port *port,
477 struct nvmet_subsys *subsys);
478 void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys,
479 struct nvmet_host *host);
480 void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,
481 u8 event_info, u8 log_page);
482
483 #define NVMET_QUEUE_SIZE 1024
484 #define NVMET_NR_QUEUES 128
485 #define NVMET_MAX_CMD NVMET_QUEUE_SIZE
486
487 /*
488 * Nice round number that makes a list of nsids fit into a page.
489 * Should become tunable at some point in the future.
490 */
491 #define NVMET_MAX_NAMESPACES 1024
492
493 /*
494 * 0 is not a valid ANA group ID, so we start numbering at 1.
495 *
496 * ANA Group 1 exists without manual intervention, has namespaces assigned to it
497 * by default, and is available in an optimized state through all ports.
498 */
499 #define NVMET_MAX_ANAGRPS 128
500 #define NVMET_DEFAULT_ANA_GRPID 1
501
502 #define NVMET_KAS 10
503 #define NVMET_DISC_KATO_MS 120000
504
505 int __init nvmet_init_configfs(void);
506 void __exit nvmet_exit_configfs(void);
507
508 int __init nvmet_init_discovery(void);
509 void nvmet_exit_discovery(void);
510
511 extern struct nvmet_subsys *nvmet_disc_subsys;
512 extern struct rw_semaphore nvmet_config_sem;
513
514 extern u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1];
515 extern u64 nvmet_ana_chgcnt;
516 extern struct rw_semaphore nvmet_ana_sem;
517
518 bool nvmet_host_allowed(struct nvmet_subsys *subsys, const char *hostnqn);
519
520 int nvmet_bdev_ns_enable(struct nvmet_ns *ns);
521 int nvmet_file_ns_enable(struct nvmet_ns *ns);
522 void nvmet_bdev_ns_disable(struct nvmet_ns *ns);
523 void nvmet_file_ns_disable(struct nvmet_ns *ns);
524 u16 nvmet_bdev_flush(struct nvmet_req *req);
525 u16 nvmet_file_flush(struct nvmet_req *req);
526 void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid);
527 void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns);
528 int nvmet_file_ns_revalidate(struct nvmet_ns *ns);
529 void nvmet_ns_revalidate(struct nvmet_ns *ns);
530
nvmet_rw_data_len(struct nvmet_req * req)531 static inline u32 nvmet_rw_data_len(struct nvmet_req *req)
532 {
533 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) <<
534 req->ns->blksize_shift;
535 }
536
nvmet_rw_metadata_len(struct nvmet_req * req)537 static inline u32 nvmet_rw_metadata_len(struct nvmet_req *req)
538 {
539 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
540 return 0;
541 return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) *
542 req->ns->metadata_size;
543 }
544
nvmet_dsm_len(struct nvmet_req * req)545 static inline u32 nvmet_dsm_len(struct nvmet_req *req)
546 {
547 return (le32_to_cpu(req->cmd->dsm.nr) + 1) *
548 sizeof(struct nvme_dsm_range);
549 }
550
551 #ifdef CONFIG_NVME_TARGET_PASSTHRU
552 void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys);
553 int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys);
554 void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys);
555 u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req);
556 u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req);
nvmet_passthru_ctrl(struct nvmet_subsys * subsys)557 static inline struct nvme_ctrl *nvmet_passthru_ctrl(struct nvmet_subsys *subsys)
558 {
559 return subsys->passthru_ctrl;
560 }
561 #else /* CONFIG_NVME_TARGET_PASSTHRU */
nvmet_passthru_subsys_free(struct nvmet_subsys * subsys)562 static inline void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys)
563 {
564 }
nvmet_passthru_ctrl_disable(struct nvmet_subsys * subsys)565 static inline void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
566 {
567 }
nvmet_parse_passthru_admin_cmd(struct nvmet_req * req)568 static inline u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req)
569 {
570 return 0;
571 }
nvmet_parse_passthru_io_cmd(struct nvmet_req * req)572 static inline u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req)
573 {
574 return 0;
575 }
nvmet_passthru_ctrl(struct nvmet_subsys * subsys)576 static inline struct nvme_ctrl *nvmet_passthru_ctrl(struct nvmet_subsys *subsys)
577 {
578 return NULL;
579 }
580 #endif /* CONFIG_NVME_TARGET_PASSTHRU */
581
582 static inline struct nvme_ctrl *
nvmet_req_passthru_ctrl(struct nvmet_req * req)583 nvmet_req_passthru_ctrl(struct nvmet_req *req)
584 {
585 return nvmet_passthru_ctrl(req->sq->ctrl->subsys);
586 }
587
588 u16 errno_to_nvme_status(struct nvmet_req *req, int errno);
589
590 /* Convert a 32-bit number to a 16-bit 0's based number */
to0based(u32 a)591 static inline __le16 to0based(u32 a)
592 {
593 return cpu_to_le16(max(1U, min(1U << 16, a)) - 1);
594 }
595
nvmet_ns_has_pi(struct nvmet_ns * ns)596 static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns)
597 {
598 if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
599 return false;
600 return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple);
601 }
602
nvmet_sect_to_lba(struct nvmet_ns * ns,sector_t sect)603 static inline __le64 nvmet_sect_to_lba(struct nvmet_ns *ns, sector_t sect)
604 {
605 return cpu_to_le64(sect >> (ns->blksize_shift - SECTOR_SHIFT));
606 }
607
nvmet_lba_to_sect(struct nvmet_ns * ns,__le64 lba)608 static inline sector_t nvmet_lba_to_sect(struct nvmet_ns *ns, __le64 lba)
609 {
610 return le64_to_cpu(lba) << (ns->blksize_shift - SECTOR_SHIFT);
611 }
612
nvmet_use_inline_bvec(struct nvmet_req * req)613 static inline bool nvmet_use_inline_bvec(struct nvmet_req *req)
614 {
615 return req->transfer_len <= NVMET_MAX_INLINE_DATA_LEN &&
616 req->sg_cnt <= NVMET_MAX_INLINE_BIOVEC;
617 }
618
619 #endif /* _NVMET_H */
620