Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause
2 : * Copyright (C) 2018 Intel Corporation.
3 : * All rights reserved.
4 : * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
5 : */
6 :
7 : #include "bdev_raid.h"
8 : #include "spdk/env.h"
9 : #include "spdk/thread.h"
10 : #include "spdk/log.h"
11 : #include "spdk/string.h"
12 : #include "spdk/util.h"
13 : #include "spdk/json.h"
14 : #include "spdk/likely.h"
15 : #include "spdk/trace.h"
16 : #include "spdk_internal/trace_defs.h"
17 :
18 : #define RAID_OFFSET_BLOCKS_INVALID UINT64_MAX
19 : #define RAID_BDEV_PROCESS_MAX_QD 16
20 :
21 : #define RAID_BDEV_PROCESS_WINDOW_SIZE_KB_DEFAULT 1024
22 : #define RAID_BDEV_PROCESS_MAX_BANDWIDTH_MB_SEC_DEFAULT 0
23 :
24 : static bool g_shutdown_started = false;
25 :
26 : /* List of all raid bdevs */
27 : struct raid_all_tailq g_raid_bdev_list = TAILQ_HEAD_INITIALIZER(g_raid_bdev_list);
28 :
29 : static TAILQ_HEAD(, raid_bdev_module) g_raid_modules = TAILQ_HEAD_INITIALIZER(g_raid_modules);
30 :
31 : /*
32 : * raid_bdev_io_channel is the context of spdk_io_channel for raid bdev device. It
33 : * contains the relationship of raid bdev io channel with base bdev io channels.
34 : */
35 : struct raid_bdev_io_channel {
36 : /* Array of IO channels of base bdevs */
37 : struct spdk_io_channel **base_channel;
38 :
39 : /* Private raid module IO channel */
40 : struct spdk_io_channel *module_channel;
41 :
42 : /* Background process data */
43 : struct {
44 : uint64_t offset;
45 : struct spdk_io_channel *target_ch;
46 : struct raid_bdev_io_channel *ch_processed;
47 : } process;
48 : };
49 :
50 : enum raid_bdev_process_state {
51 : RAID_PROCESS_STATE_INIT,
52 : RAID_PROCESS_STATE_RUNNING,
53 : RAID_PROCESS_STATE_STOPPING,
54 : RAID_PROCESS_STATE_STOPPED,
55 : };
56 :
57 : struct raid_process_qos {
58 : bool enable_qos;
59 : uint64_t last_tsc;
60 : double bytes_per_tsc;
61 : double bytes_available;
62 : double bytes_max;
63 : struct spdk_poller *process_continue_poller;
64 : };
65 :
66 : struct raid_bdev_process {
67 : struct raid_bdev *raid_bdev;
68 : enum raid_process_type type;
69 : enum raid_bdev_process_state state;
70 : struct spdk_thread *thread;
71 : struct raid_bdev_io_channel *raid_ch;
72 : TAILQ_HEAD(, raid_bdev_process_request) requests;
73 : uint64_t max_window_size;
74 : uint64_t window_size;
75 : uint64_t window_remaining;
76 : int window_status;
77 : uint64_t window_offset;
78 : bool window_range_locked;
79 : struct raid_base_bdev_info *target;
80 : int status;
81 : TAILQ_HEAD(, raid_process_finish_action) finish_actions;
82 : struct raid_process_qos qos;
83 : };
84 :
85 : struct raid_process_finish_action {
86 : spdk_msg_fn cb;
87 : void *cb_ctx;
88 : TAILQ_ENTRY(raid_process_finish_action) link;
89 : };
90 :
91 : static struct spdk_raid_bdev_opts g_opts = {
92 : .process_window_size_kb = RAID_BDEV_PROCESS_WINDOW_SIZE_KB_DEFAULT,
93 : .process_max_bandwidth_mb_sec = RAID_BDEV_PROCESS_MAX_BANDWIDTH_MB_SEC_DEFAULT,
94 : };
95 :
96 : void
97 0 : raid_bdev_get_opts(struct spdk_raid_bdev_opts *opts)
98 : {
99 0 : *opts = g_opts;
100 0 : }
101 :
102 : int
103 1 : raid_bdev_set_opts(const struct spdk_raid_bdev_opts *opts)
104 : {
105 1 : if (opts->process_window_size_kb == 0) {
106 0 : return -EINVAL;
107 : }
108 :
109 1 : g_opts = *opts;
110 :
111 1 : return 0;
112 : }
113 :
114 : static struct raid_bdev_module *
115 19 : raid_bdev_module_find(enum raid_level level)
116 : {
117 : struct raid_bdev_module *raid_module;
118 :
119 20 : TAILQ_FOREACH(raid_module, &g_raid_modules, link) {
120 18 : if (raid_module->level == level) {
121 17 : return raid_module;
122 : }
123 : }
124 :
125 2 : return NULL;
126 : }
127 :
128 : void
129 1 : raid_bdev_module_list_add(struct raid_bdev_module *raid_module)
130 : {
131 1 : if (raid_bdev_module_find(raid_module->level) != NULL) {
132 0 : SPDK_ERRLOG("module for raid level '%s' already registered.\n",
133 : raid_bdev_level_to_str(raid_module->level));
134 0 : assert(false);
135 : } else {
136 1 : TAILQ_INSERT_TAIL(&g_raid_modules, raid_module, link);
137 : }
138 1 : }
139 :
140 : struct spdk_io_channel *
141 0 : raid_bdev_channel_get_base_channel(struct raid_bdev_io_channel *raid_ch, uint8_t idx)
142 : {
143 0 : return raid_ch->base_channel[idx];
144 : }
145 :
146 : void *
147 0 : raid_bdev_channel_get_module_ctx(struct raid_bdev_io_channel *raid_ch)
148 : {
149 0 : assert(raid_ch->module_channel != NULL);
150 :
151 0 : return spdk_io_channel_get_ctx(raid_ch->module_channel);
152 : }
153 :
154 : struct raid_base_bdev_info *
155 0 : raid_bdev_channel_get_base_info(struct raid_bdev_io_channel *raid_ch, struct spdk_bdev *base_bdev)
156 : {
157 0 : struct spdk_io_channel *ch = spdk_io_channel_from_ctx(raid_ch);
158 0 : struct raid_bdev *raid_bdev = spdk_io_channel_get_io_device(ch);
159 : uint8_t i;
160 :
161 0 : for (i = 0; i < raid_bdev->num_base_bdevs; i++) {
162 0 : struct raid_base_bdev_info *base_info = &raid_bdev->base_bdev_info[i];
163 :
164 0 : if (base_info->is_configured &&
165 0 : spdk_bdev_desc_get_bdev(base_info->desc) == base_bdev) {
166 0 : return base_info;
167 : }
168 : }
169 :
170 0 : return NULL;
171 : }
172 :
173 : /* Function declarations */
174 : static void raid_bdev_examine(struct spdk_bdev *bdev);
175 : static int raid_bdev_init(void);
176 : static void raid_bdev_deconfigure(struct raid_bdev *raid_bdev,
177 : raid_bdev_destruct_cb cb_fn, void *cb_arg);
178 :
179 : static void
180 7 : raid_bdev_ch_process_cleanup(struct raid_bdev_io_channel *raid_ch)
181 : {
182 7 : raid_ch->process.offset = RAID_OFFSET_BLOCKS_INVALID;
183 :
184 7 : if (raid_ch->process.target_ch != NULL) {
185 1 : spdk_put_io_channel(raid_ch->process.target_ch);
186 1 : raid_ch->process.target_ch = NULL;
187 : }
188 :
189 7 : if (raid_ch->process.ch_processed != NULL) {
190 3 : free(raid_ch->process.ch_processed->base_channel);
191 3 : free(raid_ch->process.ch_processed);
192 3 : raid_ch->process.ch_processed = NULL;
193 : }
194 7 : }
195 :
196 : static int
197 3 : raid_bdev_ch_process_setup(struct raid_bdev_io_channel *raid_ch, struct raid_bdev_process *process)
198 : {
199 3 : struct raid_bdev *raid_bdev = process->raid_bdev;
200 : struct raid_bdev_io_channel *raid_ch_processed;
201 : struct raid_base_bdev_info *base_info;
202 :
203 3 : raid_ch->process.offset = process->window_offset;
204 :
205 : /* In the future we may have other types of processes which don't use a target bdev,
206 : * like data scrubbing or strip size migration. Until then, expect that there always is
207 : * a process target. */
208 3 : assert(process->target != NULL);
209 :
210 3 : raid_ch->process.target_ch = spdk_bdev_get_io_channel(process->target->desc);
211 3 : if (raid_ch->process.target_ch == NULL) {
212 0 : goto err;
213 : }
214 :
215 3 : raid_ch_processed = calloc(1, sizeof(*raid_ch_processed));
216 3 : if (raid_ch_processed == NULL) {
217 0 : goto err;
218 : }
219 3 : raid_ch->process.ch_processed = raid_ch_processed;
220 :
221 3 : raid_ch_processed->base_channel = calloc(raid_bdev->num_base_bdevs,
222 : sizeof(*raid_ch_processed->base_channel));
223 3 : if (raid_ch_processed->base_channel == NULL) {
224 0 : goto err;
225 : }
226 :
227 99 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
228 96 : uint8_t slot = raid_bdev_base_bdev_slot(base_info);
229 :
230 96 : if (base_info != process->target) {
231 93 : raid_ch_processed->base_channel[slot] = raid_ch->base_channel[slot];
232 : } else {
233 3 : raid_ch_processed->base_channel[slot] = raid_ch->process.target_ch;
234 : }
235 : }
236 :
237 3 : raid_ch_processed->module_channel = raid_ch->module_channel;
238 3 : raid_ch_processed->process.offset = RAID_OFFSET_BLOCKS_INVALID;
239 :
240 3 : return 0;
241 0 : err:
242 0 : raid_bdev_ch_process_cleanup(raid_ch);
243 0 : return -ENOMEM;
244 : }
245 :
246 : /*
247 : * brief:
248 : * raid_bdev_create_cb function is a cb function for raid bdev which creates the
249 : * hierarchy from raid bdev to base bdev io channels. It will be called per core
250 : * params:
251 : * io_device - pointer to raid bdev io device represented by raid_bdev
252 : * ctx_buf - pointer to context buffer for raid bdev io channel
253 : * returns:
254 : * 0 - success
255 : * non zero - failure
256 : */
257 : static int
258 5 : raid_bdev_create_cb(void *io_device, void *ctx_buf)
259 : {
260 5 : struct raid_bdev *raid_bdev = io_device;
261 5 : struct raid_bdev_io_channel *raid_ch = ctx_buf;
262 : uint8_t i;
263 5 : int ret = -ENOMEM;
264 :
265 5 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_create_cb, %p\n", raid_ch);
266 :
267 5 : assert(raid_bdev != NULL);
268 5 : assert(raid_bdev->state == RAID_BDEV_STATE_ONLINE);
269 :
270 5 : raid_ch->base_channel = calloc(raid_bdev->num_base_bdevs, sizeof(struct spdk_io_channel *));
271 5 : if (!raid_ch->base_channel) {
272 0 : SPDK_ERRLOG("Unable to allocate base bdevs io channel\n");
273 0 : return -ENOMEM;
274 : }
275 :
276 165 : for (i = 0; i < raid_bdev->num_base_bdevs; i++) {
277 : /*
278 : * Get the spdk_io_channel for all the base bdevs. This is used during
279 : * split logic to send the respective child bdev ios to respective base
280 : * bdev io channel.
281 : * Skip missing base bdevs and the process target, which should also be treated as
282 : * missing until the process completes.
283 : */
284 160 : if (raid_bdev->base_bdev_info[i].is_configured == false ||
285 160 : raid_bdev->base_bdev_info[i].is_process_target == true) {
286 0 : continue;
287 : }
288 160 : raid_ch->base_channel[i] = spdk_bdev_get_io_channel(
289 160 : raid_bdev->base_bdev_info[i].desc);
290 160 : if (!raid_ch->base_channel[i]) {
291 0 : SPDK_ERRLOG("Unable to create io channel for base bdev\n");
292 0 : goto err;
293 : }
294 : }
295 :
296 5 : if (raid_bdev->module->get_io_channel) {
297 0 : raid_ch->module_channel = raid_bdev->module->get_io_channel(raid_bdev);
298 0 : if (!raid_ch->module_channel) {
299 0 : SPDK_ERRLOG("Unable to create io channel for raid module\n");
300 0 : goto err;
301 : }
302 : }
303 :
304 5 : if (raid_bdev->process != NULL) {
305 3 : ret = raid_bdev_ch_process_setup(raid_ch, raid_bdev->process);
306 3 : if (ret != 0) {
307 0 : SPDK_ERRLOG("Failed to setup process io channel\n");
308 0 : goto err;
309 : }
310 : } else {
311 2 : raid_ch->process.offset = RAID_OFFSET_BLOCKS_INVALID;
312 : }
313 :
314 5 : return 0;
315 0 : err:
316 0 : for (i = 0; i < raid_bdev->num_base_bdevs; i++) {
317 0 : if (raid_ch->base_channel[i] != NULL) {
318 0 : spdk_put_io_channel(raid_ch->base_channel[i]);
319 : }
320 : }
321 0 : free(raid_ch->base_channel);
322 :
323 0 : raid_bdev_ch_process_cleanup(raid_ch);
324 :
325 0 : return ret;
326 : }
327 :
328 : /*
329 : * brief:
330 : * raid_bdev_destroy_cb function is a cb function for raid bdev which deletes the
331 : * hierarchy from raid bdev to base bdev io channels. It will be called per core
332 : * params:
333 : * io_device - pointer to raid bdev io device represented by raid_bdev
334 : * ctx_buf - pointer to context buffer for raid bdev io channel
335 : * returns:
336 : * none
337 : */
338 : static void
339 5 : raid_bdev_destroy_cb(void *io_device, void *ctx_buf)
340 : {
341 5 : struct raid_bdev *raid_bdev = io_device;
342 5 : struct raid_bdev_io_channel *raid_ch = ctx_buf;
343 : uint8_t i;
344 :
345 5 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_destroy_cb\n");
346 :
347 5 : assert(raid_ch != NULL);
348 5 : assert(raid_ch->base_channel);
349 :
350 5 : if (raid_ch->module_channel) {
351 0 : spdk_put_io_channel(raid_ch->module_channel);
352 : }
353 :
354 165 : for (i = 0; i < raid_bdev->num_base_bdevs; i++) {
355 : /* Free base bdev channels */
356 160 : if (raid_ch->base_channel[i] != NULL) {
357 160 : spdk_put_io_channel(raid_ch->base_channel[i]);
358 : }
359 : }
360 5 : free(raid_ch->base_channel);
361 5 : raid_ch->base_channel = NULL;
362 :
363 5 : raid_bdev_ch_process_cleanup(raid_ch);
364 5 : }
365 :
366 : /*
367 : * brief:
368 : * raid_bdev_cleanup is used to cleanup raid_bdev related data
369 : * structures.
370 : * params:
371 : * raid_bdev - pointer to raid_bdev
372 : * returns:
373 : * none
374 : */
375 : static void
376 17 : raid_bdev_cleanup(struct raid_bdev *raid_bdev)
377 : {
378 : struct raid_base_bdev_info *base_info;
379 :
380 17 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_cleanup, %p name %s, state %s\n",
381 : raid_bdev, raid_bdev->bdev.name, raid_bdev_state_to_str(raid_bdev->state));
382 17 : assert(raid_bdev->state != RAID_BDEV_STATE_ONLINE);
383 17 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
384 :
385 561 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
386 544 : assert(base_info->desc == NULL);
387 544 : free(base_info->name);
388 : }
389 :
390 17 : TAILQ_REMOVE(&g_raid_bdev_list, raid_bdev, global_link);
391 17 : }
392 :
393 : static void
394 17 : raid_bdev_free(struct raid_bdev *raid_bdev)
395 : {
396 17 : raid_bdev_free_superblock(raid_bdev);
397 17 : free(raid_bdev->base_bdev_info);
398 17 : free(raid_bdev->bdev.name);
399 17 : free(raid_bdev);
400 17 : }
401 :
402 : static void
403 3 : raid_bdev_cleanup_and_free(struct raid_bdev *raid_bdev)
404 : {
405 3 : raid_bdev_cleanup(raid_bdev);
406 3 : raid_bdev_free(raid_bdev);
407 3 : }
408 :
409 : static void
410 510 : raid_bdev_deconfigure_base_bdev(struct raid_base_bdev_info *base_info)
411 : {
412 510 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
413 :
414 510 : assert(base_info->is_configured);
415 510 : assert(raid_bdev->num_base_bdevs_discovered);
416 510 : raid_bdev->num_base_bdevs_discovered--;
417 510 : base_info->is_configured = false;
418 510 : base_info->is_process_target = false;
419 510 : }
420 :
421 : /*
422 : * brief:
423 : * free resource of base bdev for raid bdev
424 : * params:
425 : * base_info - raid base bdev info
426 : * returns:
427 : * none
428 : */
429 : static void
430 543 : raid_bdev_free_base_bdev_resource(struct raid_base_bdev_info *base_info)
431 : {
432 543 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
433 :
434 543 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
435 543 : assert(base_info->configure_cb == NULL);
436 :
437 543 : free(base_info->name);
438 543 : base_info->name = NULL;
439 543 : if (raid_bdev->state != RAID_BDEV_STATE_CONFIGURING) {
440 448 : spdk_uuid_set_null(&base_info->uuid);
441 : }
442 543 : base_info->is_failed = false;
443 :
444 : /* clear `data_offset` to allow it to be recalculated during configuration */
445 543 : base_info->data_offset = 0;
446 :
447 543 : if (base_info->desc == NULL) {
448 33 : return;
449 : }
450 :
451 510 : spdk_bdev_module_release_bdev(spdk_bdev_desc_get_bdev(base_info->desc));
452 510 : spdk_bdev_close(base_info->desc);
453 510 : base_info->desc = NULL;
454 510 : spdk_put_io_channel(base_info->app_thread_ch);
455 510 : base_info->app_thread_ch = NULL;
456 :
457 510 : if (base_info->is_configured) {
458 510 : raid_bdev_deconfigure_base_bdev(base_info);
459 : }
460 : }
461 :
462 : static void
463 14 : raid_bdev_io_device_unregister_cb(void *io_device)
464 : {
465 14 : struct raid_bdev *raid_bdev = io_device;
466 :
467 14 : if (raid_bdev->num_base_bdevs_discovered == 0) {
468 : /* Free raid_bdev when there are no base bdevs left */
469 14 : SPDK_DEBUGLOG(bdev_raid, "raid bdev base bdevs is 0, going to free all in destruct\n");
470 14 : raid_bdev_cleanup(raid_bdev);
471 14 : spdk_bdev_destruct_done(&raid_bdev->bdev, 0);
472 14 : raid_bdev_free(raid_bdev);
473 : } else {
474 0 : spdk_bdev_destruct_done(&raid_bdev->bdev, 0);
475 : }
476 14 : }
477 :
478 : void
479 14 : raid_bdev_module_stop_done(struct raid_bdev *raid_bdev)
480 : {
481 14 : if (raid_bdev->state != RAID_BDEV_STATE_CONFIGURING) {
482 14 : spdk_io_device_unregister(raid_bdev, raid_bdev_io_device_unregister_cb);
483 : }
484 14 : }
485 :
486 : static void
487 14 : _raid_bdev_destruct(void *ctxt)
488 : {
489 14 : struct raid_bdev *raid_bdev = ctxt;
490 : struct raid_base_bdev_info *base_info;
491 :
492 14 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_destruct\n");
493 :
494 14 : assert(raid_bdev->process == NULL);
495 :
496 462 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
497 : /*
498 : * Close all base bdev descriptors for which call has come from below
499 : * layers. Also close the descriptors if we have started shutdown.
500 : */
501 448 : if (g_shutdown_started || base_info->remove_scheduled == true) {
502 448 : raid_bdev_free_base_bdev_resource(base_info);
503 : }
504 : }
505 :
506 14 : if (g_shutdown_started) {
507 0 : raid_bdev->state = RAID_BDEV_STATE_OFFLINE;
508 : }
509 :
510 14 : if (raid_bdev->module->stop != NULL) {
511 0 : if (raid_bdev->module->stop(raid_bdev) == false) {
512 0 : return;
513 : }
514 : }
515 :
516 14 : raid_bdev_module_stop_done(raid_bdev);
517 : }
518 :
519 : static int
520 14 : raid_bdev_destruct(void *ctx)
521 : {
522 14 : spdk_thread_exec_msg(spdk_thread_get_app_thread(), _raid_bdev_destruct, ctx);
523 :
524 14 : return 1;
525 : }
526 :
527 : int
528 0 : raid_bdev_remap_dix_reftag(void *md_buf, uint64_t num_blocks,
529 : struct spdk_bdev *bdev, uint32_t remapped_offset)
530 : {
531 0 : struct spdk_dif_ctx dif_ctx;
532 0 : struct spdk_dif_error err_blk = {};
533 : int rc;
534 0 : struct spdk_dif_ctx_init_ext_opts dif_opts;
535 0 : struct iovec md_iov = {
536 : .iov_base = md_buf,
537 0 : .iov_len = num_blocks * bdev->md_len,
538 : };
539 :
540 0 : if (md_buf == NULL) {
541 0 : return 0;
542 : }
543 :
544 0 : dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
545 0 : dif_opts.dif_pi_format = bdev->dif_pi_format;
546 0 : rc = spdk_dif_ctx_init(&dif_ctx,
547 0 : bdev->blocklen, bdev->md_len, bdev->md_interleave,
548 0 : bdev->dif_is_head_of_md, bdev->dif_type,
549 : SPDK_DIF_FLAGS_REFTAG_CHECK,
550 : 0, 0, 0, 0, 0, &dif_opts);
551 0 : if (rc != 0) {
552 0 : SPDK_ERRLOG("Initialization of DIF context failed\n");
553 0 : return rc;
554 : }
555 :
556 0 : spdk_dif_ctx_set_remapped_init_ref_tag(&dif_ctx, remapped_offset);
557 :
558 0 : rc = spdk_dix_remap_ref_tag(&md_iov, num_blocks, &dif_ctx, &err_blk, false);
559 0 : if (rc != 0) {
560 0 : SPDK_ERRLOG("Remapping reference tag failed. type=%d, offset=%d"
561 : PRIu32 "\n", err_blk.err_type, err_blk.err_offset);
562 : }
563 :
564 0 : return rc;
565 : }
566 :
567 : int
568 0 : raid_bdev_verify_dix_reftag(struct iovec *iovs, int iovcnt, void *md_buf,
569 : uint64_t num_blocks, struct spdk_bdev *bdev, uint32_t offset_blocks)
570 : {
571 0 : struct spdk_dif_ctx dif_ctx;
572 0 : struct spdk_dif_error err_blk = {};
573 : int rc;
574 0 : struct spdk_dif_ctx_init_ext_opts dif_opts;
575 0 : struct iovec md_iov = {
576 : .iov_base = md_buf,
577 0 : .iov_len = num_blocks * bdev->md_len,
578 : };
579 :
580 0 : if (md_buf == NULL) {
581 0 : return 0;
582 : }
583 :
584 0 : dif_opts.size = SPDK_SIZEOF(&dif_opts, dif_pi_format);
585 0 : dif_opts.dif_pi_format = bdev->dif_pi_format;
586 0 : rc = spdk_dif_ctx_init(&dif_ctx,
587 0 : bdev->blocklen, bdev->md_len, bdev->md_interleave,
588 0 : bdev->dif_is_head_of_md, bdev->dif_type,
589 : SPDK_DIF_FLAGS_REFTAG_CHECK,
590 : offset_blocks, 0, 0, 0, 0, &dif_opts);
591 0 : if (rc != 0) {
592 0 : SPDK_ERRLOG("Initialization of DIF context failed\n");
593 0 : return rc;
594 : }
595 :
596 0 : rc = spdk_dix_verify(iovs, iovcnt, &md_iov, num_blocks, &dif_ctx, &err_blk);
597 0 : if (rc != 0) {
598 0 : SPDK_ERRLOG("Reference tag check failed. type=%d, offset=%d"
599 : PRIu32 "\n", err_blk.err_type, err_blk.err_offset);
600 : }
601 :
602 0 : return rc;
603 : }
604 :
605 : void
606 11 : raid_bdev_io_complete(struct raid_bdev_io *raid_io, enum spdk_bdev_io_status status)
607 : {
608 11 : struct spdk_bdev_io *bdev_io = spdk_bdev_io_from_ctx(raid_io);
609 : int rc;
610 :
611 11 : spdk_trace_record(TRACE_BDEV_RAID_IO_DONE, 0, 0, (uintptr_t)raid_io, (uintptr_t)bdev_io);
612 :
613 11 : if (raid_io->split.offset != RAID_OFFSET_BLOCKS_INVALID) {
614 10 : struct iovec *split_iov = raid_io->split.iov;
615 10 : const struct iovec *split_iov_orig = &raid_io->split.iov_copy;
616 :
617 : /*
618 : * Non-zero offset here means that this is the completion of the first part of the
619 : * split I/O (the higher LBAs). Then, we submit the second part and set offset to 0.
620 : */
621 10 : if (raid_io->split.offset != 0) {
622 5 : raid_io->offset_blocks = bdev_io->u.bdev.offset_blocks;
623 5 : raid_io->md_buf = bdev_io->u.bdev.md_buf;
624 :
625 5 : if (status == SPDK_BDEV_IO_STATUS_SUCCESS) {
626 5 : raid_io->num_blocks = raid_io->split.offset;
627 5 : raid_io->iovcnt = raid_io->iovs - bdev_io->u.bdev.iovs;
628 5 : raid_io->iovs = bdev_io->u.bdev.iovs;
629 5 : if (split_iov != NULL) {
630 4 : raid_io->iovcnt++;
631 4 : split_iov->iov_len = split_iov->iov_base - split_iov_orig->iov_base;
632 4 : split_iov->iov_base = split_iov_orig->iov_base;
633 : }
634 :
635 5 : raid_io->split.offset = 0;
636 5 : raid_io->base_bdev_io_submitted = 0;
637 5 : raid_io->raid_ch = raid_io->raid_ch->process.ch_processed;
638 :
639 5 : raid_io->raid_bdev->module->submit_rw_request(raid_io);
640 5 : return;
641 : }
642 : }
643 :
644 5 : raid_io->num_blocks = bdev_io->u.bdev.num_blocks;
645 5 : raid_io->iovcnt = bdev_io->u.bdev.iovcnt;
646 5 : raid_io->iovs = bdev_io->u.bdev.iovs;
647 5 : if (split_iov != NULL) {
648 4 : *split_iov = *split_iov_orig;
649 : }
650 : }
651 :
652 6 : if (spdk_unlikely(raid_io->completion_cb != NULL)) {
653 0 : raid_io->completion_cb(raid_io, status);
654 : } else {
655 6 : if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_READ &&
656 : spdk_bdev_get_dif_type(bdev_io->bdev) != SPDK_DIF_DISABLE &&
657 : bdev_io->bdev->dif_check_flags & SPDK_DIF_FLAGS_REFTAG_CHECK &&
658 : status == SPDK_BDEV_IO_STATUS_SUCCESS)) {
659 :
660 0 : rc = raid_bdev_remap_dix_reftag(bdev_io->u.bdev.md_buf,
661 : bdev_io->u.bdev.num_blocks, bdev_io->bdev,
662 0 : bdev_io->u.bdev.offset_blocks);
663 0 : if (rc != 0) {
664 0 : status = SPDK_BDEV_IO_STATUS_FAILED;
665 : }
666 : }
667 6 : spdk_bdev_io_complete(bdev_io, status);
668 : }
669 : }
670 :
671 : /*
672 : * brief:
673 : * raid_bdev_io_complete_part - signal the completion of a part of the expected
674 : * base bdev IOs and complete the raid_io if this is the final expected IO.
675 : * The caller should first set raid_io->base_bdev_io_remaining. This function
676 : * will decrement this counter by the value of the 'completed' parameter and
677 : * complete the raid_io if the counter reaches 0. The caller is free to
678 : * interpret the 'base_bdev_io_remaining' and 'completed' values as needed,
679 : * it can represent e.g. blocks or IOs.
680 : * params:
681 : * raid_io - pointer to raid_bdev_io
682 : * completed - the part of the raid_io that has been completed
683 : * status - status of the base IO
684 : * returns:
685 : * true - if the raid_io is completed
686 : * false - otherwise
687 : */
688 : bool
689 32 : raid_bdev_io_complete_part(struct raid_bdev_io *raid_io, uint64_t completed,
690 : enum spdk_bdev_io_status status)
691 : {
692 32 : assert(raid_io->base_bdev_io_remaining >= completed);
693 32 : raid_io->base_bdev_io_remaining -= completed;
694 :
695 32 : if (status != raid_io->base_bdev_io_status_default) {
696 0 : raid_io->base_bdev_io_status = status;
697 : }
698 :
699 32 : if (raid_io->base_bdev_io_remaining == 0) {
700 1 : raid_bdev_io_complete(raid_io, raid_io->base_bdev_io_status);
701 1 : return true;
702 : } else {
703 31 : return false;
704 : }
705 : }
706 :
707 : /*
708 : * brief:
709 : * raid_bdev_queue_io_wait function processes the IO which failed to submit.
710 : * It will try to queue the IOs after storing the context to bdev wait queue logic.
711 : * params:
712 : * raid_io - pointer to raid_bdev_io
713 : * bdev - the block device that the IO is submitted to
714 : * ch - io channel
715 : * cb_fn - callback when the spdk_bdev_io for bdev becomes available
716 : * returns:
717 : * none
718 : */
719 : void
720 0 : raid_bdev_queue_io_wait(struct raid_bdev_io *raid_io, struct spdk_bdev *bdev,
721 : struct spdk_io_channel *ch, spdk_bdev_io_wait_cb cb_fn)
722 : {
723 0 : raid_io->waitq_entry.bdev = bdev;
724 0 : raid_io->waitq_entry.cb_fn = cb_fn;
725 0 : raid_io->waitq_entry.cb_arg = raid_io;
726 0 : spdk_bdev_queue_io_wait(bdev, ch, &raid_io->waitq_entry);
727 0 : }
728 :
729 : static void
730 32 : raid_base_bdev_reset_complete(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
731 : {
732 32 : struct raid_bdev_io *raid_io = cb_arg;
733 :
734 32 : spdk_bdev_free_io(bdev_io);
735 :
736 32 : raid_bdev_io_complete_part(raid_io, 1, success ?
737 : SPDK_BDEV_IO_STATUS_SUCCESS :
738 : SPDK_BDEV_IO_STATUS_FAILED);
739 32 : }
740 :
741 : static void raid_bdev_submit_reset_request(struct raid_bdev_io *raid_io);
742 :
743 : static void
744 0 : _raid_bdev_submit_reset_request(void *_raid_io)
745 : {
746 0 : struct raid_bdev_io *raid_io = _raid_io;
747 :
748 0 : raid_bdev_submit_reset_request(raid_io);
749 0 : }
750 :
751 : /*
752 : * brief:
753 : * raid_bdev_submit_reset_request function submits reset requests
754 : * to member disks; it will submit as many as possible unless a reset fails with -ENOMEM, in
755 : * which case it will queue it for later submission
756 : * params:
757 : * raid_io
758 : * returns:
759 : * none
760 : */
761 : static void
762 1 : raid_bdev_submit_reset_request(struct raid_bdev_io *raid_io)
763 : {
764 : struct raid_bdev *raid_bdev;
765 : int ret;
766 : uint8_t i;
767 : struct raid_base_bdev_info *base_info;
768 : struct spdk_io_channel *base_ch;
769 :
770 1 : raid_bdev = raid_io->raid_bdev;
771 :
772 1 : if (raid_io->base_bdev_io_remaining == 0) {
773 1 : raid_io->base_bdev_io_remaining = raid_bdev->num_base_bdevs;
774 : }
775 :
776 33 : for (i = raid_io->base_bdev_io_submitted; i < raid_bdev->num_base_bdevs; i++) {
777 32 : base_info = &raid_bdev->base_bdev_info[i];
778 32 : base_ch = raid_io->raid_ch->base_channel[i];
779 32 : if (base_ch == NULL) {
780 0 : raid_io->base_bdev_io_submitted++;
781 0 : raid_bdev_io_complete_part(raid_io, 1, SPDK_BDEV_IO_STATUS_SUCCESS);
782 0 : continue;
783 : }
784 32 : ret = spdk_bdev_reset(base_info->desc, base_ch,
785 : raid_base_bdev_reset_complete, raid_io);
786 32 : if (ret == 0) {
787 32 : raid_io->base_bdev_io_submitted++;
788 0 : } else if (ret == -ENOMEM) {
789 0 : raid_bdev_queue_io_wait(raid_io, spdk_bdev_desc_get_bdev(base_info->desc),
790 : base_ch, _raid_bdev_submit_reset_request);
791 0 : return;
792 : } else {
793 0 : SPDK_ERRLOG("bdev io submit error not due to ENOMEM, it should not happen\n");
794 0 : assert(false);
795 : raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
796 : return;
797 : }
798 : }
799 : }
800 :
801 : static void
802 5 : raid_bdev_io_split(struct raid_bdev_io *raid_io, uint64_t split_offset)
803 : {
804 5 : struct raid_bdev *raid_bdev = raid_io->raid_bdev;
805 5 : size_t iov_offset = split_offset * raid_bdev->bdev.blocklen;
806 : int i;
807 :
808 5 : assert(split_offset != 0);
809 5 : assert(raid_io->split.offset == RAID_OFFSET_BLOCKS_INVALID);
810 5 : raid_io->split.offset = split_offset;
811 :
812 5 : raid_io->offset_blocks += split_offset;
813 5 : raid_io->num_blocks -= split_offset;
814 5 : if (raid_io->md_buf != NULL) {
815 5 : raid_io->md_buf += (split_offset * raid_bdev->bdev.md_len);
816 : }
817 :
818 12 : for (i = 0; i < raid_io->iovcnt; i++) {
819 12 : struct iovec *iov = &raid_io->iovs[i];
820 :
821 12 : if (iov_offset < iov->iov_len) {
822 5 : if (iov_offset == 0) {
823 1 : raid_io->split.iov = NULL;
824 : } else {
825 4 : raid_io->split.iov = iov;
826 4 : raid_io->split.iov_copy = *iov;
827 4 : iov->iov_base += iov_offset;
828 4 : iov->iov_len -= iov_offset;
829 : }
830 5 : raid_io->iovs += i;
831 5 : raid_io->iovcnt -= i;
832 5 : break;
833 : }
834 :
835 7 : iov_offset -= iov->iov_len;
836 : }
837 5 : }
838 :
839 : static void
840 5 : raid_bdev_submit_rw_request(struct raid_bdev_io *raid_io)
841 : {
842 5 : struct raid_bdev_io_channel *raid_ch = raid_io->raid_ch;
843 :
844 5 : if (raid_ch->process.offset != RAID_OFFSET_BLOCKS_INVALID) {
845 5 : uint64_t offset_begin = raid_io->offset_blocks;
846 5 : uint64_t offset_end = offset_begin + raid_io->num_blocks;
847 :
848 5 : if (offset_end > raid_ch->process.offset) {
849 5 : if (offset_begin < raid_ch->process.offset) {
850 : /*
851 : * If the I/O spans both the processed and unprocessed ranges,
852 : * split it and first handle the unprocessed part. After it
853 : * completes, the rest will be handled.
854 : * This situation occurs when the process thread is not active
855 : * or is waiting for the process window range to be locked
856 : * (quiesced). When a window is being processed, such I/Os will be
857 : * deferred by the bdev layer until the window is unlocked.
858 : */
859 5 : SPDK_DEBUGLOG(bdev_raid, "split: process_offset: %lu offset_begin: %lu offset_end: %lu\n",
860 : raid_ch->process.offset, offset_begin, offset_end);
861 5 : raid_bdev_io_split(raid_io, raid_ch->process.offset - offset_begin);
862 : }
863 : } else {
864 : /* Use the child channel, which corresponds to the already processed range */
865 0 : raid_io->raid_ch = raid_ch->process.ch_processed;
866 : }
867 : }
868 :
869 5 : raid_io->raid_bdev->module->submit_rw_request(raid_io);
870 5 : }
871 :
872 : /*
873 : * brief:
874 : * Callback function to spdk_bdev_io_get_buf.
875 : * params:
876 : * ch - pointer to raid bdev io channel
877 : * bdev_io - pointer to parent bdev_io on raid bdev device
878 : * success - True if buffer is allocated or false otherwise.
879 : * returns:
880 : * none
881 : */
882 : static void
883 0 : raid_bdev_get_buf_cb(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io,
884 : bool success)
885 : {
886 0 : struct raid_bdev_io *raid_io = (struct raid_bdev_io *)bdev_io->driver_ctx;
887 :
888 0 : if (!success) {
889 0 : raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
890 0 : return;
891 : }
892 :
893 0 : raid_io->iovs = bdev_io->u.bdev.iovs;
894 0 : raid_io->iovcnt = bdev_io->u.bdev.iovcnt;
895 0 : raid_io->md_buf = bdev_io->u.bdev.md_buf;
896 :
897 0 : raid_bdev_submit_rw_request(raid_io);
898 : }
899 :
900 : void
901 6 : raid_bdev_io_init(struct raid_bdev_io *raid_io, struct raid_bdev_io_channel *raid_ch,
902 : enum spdk_bdev_io_type type, uint64_t offset_blocks,
903 : uint64_t num_blocks, struct iovec *iovs, int iovcnt, void *md_buf,
904 : struct spdk_memory_domain *memory_domain, void *memory_domain_ctx)
905 : {
906 6 : struct spdk_io_channel *ch = spdk_io_channel_from_ctx(raid_ch);
907 6 : struct raid_bdev *raid_bdev = spdk_io_channel_get_io_device(ch);
908 :
909 6 : raid_io->type = type;
910 6 : raid_io->offset_blocks = offset_blocks;
911 6 : raid_io->num_blocks = num_blocks;
912 6 : raid_io->iovs = iovs;
913 6 : raid_io->iovcnt = iovcnt;
914 6 : raid_io->memory_domain = memory_domain;
915 6 : raid_io->memory_domain_ctx = memory_domain_ctx;
916 6 : raid_io->md_buf = md_buf;
917 :
918 6 : raid_io->raid_bdev = raid_bdev;
919 6 : raid_io->raid_ch = raid_ch;
920 6 : raid_io->base_bdev_io_remaining = 0;
921 6 : raid_io->base_bdev_io_submitted = 0;
922 6 : raid_io->completion_cb = NULL;
923 6 : raid_io->split.offset = RAID_OFFSET_BLOCKS_INVALID;
924 :
925 6 : raid_bdev_io_set_default_status(raid_io, SPDK_BDEV_IO_STATUS_SUCCESS);
926 6 : }
927 :
928 : /*
929 : * brief:
930 : * raid_bdev_submit_request function is the submit_request function pointer of
931 : * raid bdev function table. This is used to submit the io on raid_bdev to below
932 : * layers.
933 : * params:
934 : * ch - pointer to raid bdev io channel
935 : * bdev_io - pointer to parent bdev_io on raid bdev device
936 : * returns:
937 : * none
938 : */
939 : static void
940 6 : raid_bdev_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
941 : {
942 6 : struct raid_bdev_io *raid_io = (struct raid_bdev_io *)bdev_io->driver_ctx;
943 :
944 6 : raid_bdev_io_init(raid_io, spdk_io_channel_get_ctx(ch), bdev_io->type,
945 : bdev_io->u.bdev.offset_blocks, bdev_io->u.bdev.num_blocks,
946 : bdev_io->u.bdev.iovs, bdev_io->u.bdev.iovcnt, bdev_io->u.bdev.md_buf,
947 : bdev_io->u.bdev.memory_domain, bdev_io->u.bdev.memory_domain_ctx);
948 :
949 6 : spdk_trace_record(TRACE_BDEV_RAID_IO_START, 0, 0, (uintptr_t)raid_io, (uintptr_t)bdev_io);
950 :
951 6 : switch (bdev_io->type) {
952 0 : case SPDK_BDEV_IO_TYPE_READ:
953 0 : spdk_bdev_io_get_buf(bdev_io, raid_bdev_get_buf_cb,
954 0 : bdev_io->u.bdev.num_blocks * bdev_io->bdev->blocklen);
955 0 : break;
956 5 : case SPDK_BDEV_IO_TYPE_WRITE:
957 5 : raid_bdev_submit_rw_request(raid_io);
958 5 : break;
959 :
960 1 : case SPDK_BDEV_IO_TYPE_RESET:
961 1 : raid_bdev_submit_reset_request(raid_io);
962 1 : break;
963 :
964 0 : case SPDK_BDEV_IO_TYPE_FLUSH:
965 : case SPDK_BDEV_IO_TYPE_UNMAP:
966 0 : if (raid_io->raid_bdev->process != NULL) {
967 : /* TODO: rebuild support */
968 0 : raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
969 0 : return;
970 : }
971 0 : raid_io->raid_bdev->module->submit_null_payload_request(raid_io);
972 0 : break;
973 :
974 0 : default:
975 0 : SPDK_ERRLOG("submit request, invalid io type %u\n", bdev_io->type);
976 0 : raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
977 0 : break;
978 : }
979 : }
980 :
981 : /*
982 : * brief:
983 : * _raid_bdev_io_type_supported checks whether io_type is supported in
984 : * all base bdev modules of raid bdev module. If anyone among the base_bdevs
985 : * doesn't support, the raid device doesn't supports.
986 : *
987 : * params:
988 : * raid_bdev - pointer to raid bdev context
989 : * io_type - io type
990 : * returns:
991 : * true - io_type is supported
992 : * false - io_type is not supported
993 : */
994 : inline static bool
995 1 : _raid_bdev_io_type_supported(struct raid_bdev *raid_bdev, enum spdk_bdev_io_type io_type)
996 : {
997 : struct raid_base_bdev_info *base_info;
998 :
999 1 : if (io_type == SPDK_BDEV_IO_TYPE_FLUSH ||
1000 : io_type == SPDK_BDEV_IO_TYPE_UNMAP) {
1001 0 : if (raid_bdev->module->submit_null_payload_request == NULL) {
1002 0 : return false;
1003 : }
1004 : }
1005 :
1006 33 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1007 32 : if (base_info->desc == NULL) {
1008 0 : continue;
1009 : }
1010 :
1011 32 : if (spdk_bdev_io_type_supported(spdk_bdev_desc_get_bdev(base_info->desc), io_type) == false) {
1012 0 : return false;
1013 : }
1014 : }
1015 :
1016 1 : return true;
1017 : }
1018 :
1019 : /*
1020 : * brief:
1021 : * raid_bdev_io_type_supported is the io_supported function for bdev function
1022 : * table which returns whether the particular io type is supported or not by
1023 : * raid bdev module
1024 : * params:
1025 : * ctx - pointer to raid bdev context
1026 : * type - io type
1027 : * returns:
1028 : * true - io_type is supported
1029 : * false - io_type is not supported
1030 : */
1031 : static bool
1032 4 : raid_bdev_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
1033 : {
1034 4 : switch (io_type) {
1035 2 : case SPDK_BDEV_IO_TYPE_READ:
1036 : case SPDK_BDEV_IO_TYPE_WRITE:
1037 2 : return true;
1038 :
1039 1 : case SPDK_BDEV_IO_TYPE_FLUSH:
1040 : case SPDK_BDEV_IO_TYPE_RESET:
1041 : case SPDK_BDEV_IO_TYPE_UNMAP:
1042 1 : return _raid_bdev_io_type_supported(ctx, io_type);
1043 :
1044 1 : default:
1045 1 : return false;
1046 : }
1047 :
1048 : return false;
1049 : }
1050 :
1051 : /*
1052 : * brief:
1053 : * raid_bdev_get_io_channel is the get_io_channel function table pointer for
1054 : * raid bdev. This is used to return the io channel for this raid bdev
1055 : * params:
1056 : * ctxt - pointer to raid_bdev
1057 : * returns:
1058 : * pointer to io channel for raid bdev
1059 : */
1060 : static struct spdk_io_channel *
1061 0 : raid_bdev_get_io_channel(void *ctxt)
1062 : {
1063 0 : struct raid_bdev *raid_bdev = ctxt;
1064 :
1065 0 : return spdk_get_io_channel(raid_bdev);
1066 : }
1067 :
1068 : void
1069 7 : raid_bdev_write_info_json(struct raid_bdev *raid_bdev, struct spdk_json_write_ctx *w)
1070 : {
1071 : struct raid_base_bdev_info *base_info;
1072 :
1073 7 : assert(raid_bdev != NULL);
1074 7 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
1075 :
1076 7 : spdk_json_write_named_uuid(w, "uuid", &raid_bdev->bdev.uuid);
1077 7 : spdk_json_write_named_uint32(w, "strip_size_kb", raid_bdev->strip_size_kb);
1078 7 : spdk_json_write_named_string(w, "state", raid_bdev_state_to_str(raid_bdev->state));
1079 7 : spdk_json_write_named_string(w, "raid_level", raid_bdev_level_to_str(raid_bdev->level));
1080 7 : spdk_json_write_named_bool(w, "superblock", raid_bdev->superblock_enabled);
1081 7 : spdk_json_write_named_uint32(w, "num_base_bdevs", raid_bdev->num_base_bdevs);
1082 7 : spdk_json_write_named_uint32(w, "num_base_bdevs_discovered", raid_bdev->num_base_bdevs_discovered);
1083 7 : spdk_json_write_named_uint32(w, "num_base_bdevs_operational",
1084 7 : raid_bdev->num_base_bdevs_operational);
1085 7 : if (raid_bdev->process) {
1086 0 : struct raid_bdev_process *process = raid_bdev->process;
1087 0 : uint64_t offset = process->window_offset;
1088 :
1089 0 : spdk_json_write_named_object_begin(w, "process");
1090 0 : spdk_json_write_name(w, "type");
1091 0 : spdk_json_write_string(w, raid_bdev_process_to_str(process->type));
1092 0 : spdk_json_write_named_string(w, "target", process->target->name);
1093 0 : spdk_json_write_named_object_begin(w, "progress");
1094 0 : spdk_json_write_named_uint64(w, "blocks", offset);
1095 0 : spdk_json_write_named_uint32(w, "percent", offset * 100.0 / raid_bdev->bdev.blockcnt);
1096 0 : spdk_json_write_object_end(w);
1097 0 : spdk_json_write_object_end(w);
1098 : }
1099 7 : spdk_json_write_name(w, "base_bdevs_list");
1100 7 : spdk_json_write_array_begin(w);
1101 231 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1102 224 : spdk_json_write_object_begin(w);
1103 224 : spdk_json_write_name(w, "name");
1104 224 : if (base_info->name) {
1105 224 : spdk_json_write_string(w, base_info->name);
1106 : } else {
1107 0 : spdk_json_write_null(w);
1108 : }
1109 224 : spdk_json_write_named_uuid(w, "uuid", &base_info->uuid);
1110 224 : spdk_json_write_named_bool(w, "is_configured", base_info->is_configured);
1111 224 : spdk_json_write_named_uint64(w, "data_offset", base_info->data_offset);
1112 224 : spdk_json_write_named_uint64(w, "data_size", base_info->data_size);
1113 224 : spdk_json_write_object_end(w);
1114 : }
1115 7 : spdk_json_write_array_end(w);
1116 7 : }
1117 :
1118 : /*
1119 : * brief:
1120 : * raid_bdev_dump_info_json is the function table pointer for raid bdev
1121 : * params:
1122 : * ctx - pointer to raid_bdev
1123 : * w - pointer to json context
1124 : * returns:
1125 : * 0 - success
1126 : * non zero - failure
1127 : */
1128 : static int
1129 1 : raid_bdev_dump_info_json(void *ctx, struct spdk_json_write_ctx *w)
1130 : {
1131 1 : struct raid_bdev *raid_bdev = ctx;
1132 :
1133 1 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_dump_config_json\n");
1134 :
1135 : /* Dump the raid bdev configuration related information */
1136 1 : spdk_json_write_named_object_begin(w, "raid");
1137 1 : raid_bdev_write_info_json(raid_bdev, w);
1138 1 : spdk_json_write_object_end(w);
1139 :
1140 1 : return 0;
1141 : }
1142 :
1143 : /*
1144 : * brief:
1145 : * raid_bdev_write_config_json is the function table pointer for raid bdev
1146 : * params:
1147 : * bdev - pointer to spdk_bdev
1148 : * w - pointer to json context
1149 : * returns:
1150 : * none
1151 : */
1152 : static void
1153 0 : raid_bdev_write_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
1154 : {
1155 0 : struct raid_bdev *raid_bdev = bdev->ctxt;
1156 : struct raid_base_bdev_info *base_info;
1157 :
1158 0 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
1159 :
1160 0 : if (raid_bdev->superblock_enabled) {
1161 : /* raid bdev configuration is stored in the superblock */
1162 0 : return;
1163 : }
1164 :
1165 0 : spdk_json_write_object_begin(w);
1166 :
1167 0 : spdk_json_write_named_string(w, "method", "bdev_raid_create");
1168 :
1169 0 : spdk_json_write_named_object_begin(w, "params");
1170 0 : spdk_json_write_named_string(w, "name", bdev->name);
1171 0 : spdk_json_write_named_uuid(w, "uuid", &raid_bdev->bdev.uuid);
1172 0 : if (raid_bdev->strip_size_kb != 0) {
1173 0 : spdk_json_write_named_uint32(w, "strip_size_kb", raid_bdev->strip_size_kb);
1174 : }
1175 0 : spdk_json_write_named_string(w, "raid_level", raid_bdev_level_to_str(raid_bdev->level));
1176 :
1177 0 : spdk_json_write_named_array_begin(w, "base_bdevs");
1178 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1179 0 : if (base_info->name) {
1180 0 : spdk_json_write_string(w, base_info->name);
1181 : } else {
1182 0 : char str[32];
1183 :
1184 0 : snprintf(str, sizeof(str), "removed_base_bdev_%u", raid_bdev_base_bdev_slot(base_info));
1185 0 : spdk_json_write_string(w, str);
1186 : }
1187 : }
1188 0 : spdk_json_write_array_end(w);
1189 0 : spdk_json_write_object_end(w);
1190 :
1191 0 : spdk_json_write_object_end(w);
1192 : }
1193 :
1194 : static int
1195 0 : raid_bdev_get_memory_domains(void *ctx, struct spdk_memory_domain **domains, int array_size)
1196 : {
1197 0 : struct raid_bdev *raid_bdev = ctx;
1198 : struct raid_base_bdev_info *base_info;
1199 0 : int domains_count = 0, rc = 0;
1200 :
1201 0 : if (raid_bdev->module->memory_domains_supported == false) {
1202 0 : return 0;
1203 : }
1204 :
1205 : /* First loop to get the number of memory domains */
1206 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1207 0 : if (base_info->is_configured == false) {
1208 0 : continue;
1209 : }
1210 0 : rc = spdk_bdev_get_memory_domains(spdk_bdev_desc_get_bdev(base_info->desc), NULL, 0);
1211 0 : if (rc < 0) {
1212 0 : return rc;
1213 : }
1214 0 : domains_count += rc;
1215 : }
1216 :
1217 0 : if (!domains || array_size < domains_count) {
1218 0 : return domains_count;
1219 : }
1220 :
1221 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1222 0 : if (base_info->is_configured == false) {
1223 0 : continue;
1224 : }
1225 0 : rc = spdk_bdev_get_memory_domains(spdk_bdev_desc_get_bdev(base_info->desc), domains, array_size);
1226 0 : if (rc < 0) {
1227 0 : return rc;
1228 : }
1229 0 : domains += rc;
1230 0 : array_size -= rc;
1231 : }
1232 :
1233 0 : return domains_count;
1234 : }
1235 :
1236 : /* g_raid_bdev_fn_table is the function table for raid bdev */
1237 : static const struct spdk_bdev_fn_table g_raid_bdev_fn_table = {
1238 : .destruct = raid_bdev_destruct,
1239 : .submit_request = raid_bdev_submit_request,
1240 : .io_type_supported = raid_bdev_io_type_supported,
1241 : .get_io_channel = raid_bdev_get_io_channel,
1242 : .dump_info_json = raid_bdev_dump_info_json,
1243 : .write_config_json = raid_bdev_write_config_json,
1244 : .get_memory_domains = raid_bdev_get_memory_domains,
1245 : };
1246 :
1247 : struct raid_bdev *
1248 36 : raid_bdev_find_by_name(const char *name)
1249 : {
1250 : struct raid_bdev *raid_bdev;
1251 :
1252 43 : TAILQ_FOREACH(raid_bdev, &g_raid_bdev_list, global_link) {
1253 23 : if (strcmp(raid_bdev->bdev.name, name) == 0) {
1254 16 : return raid_bdev;
1255 : }
1256 : }
1257 :
1258 20 : return NULL;
1259 : }
1260 :
1261 : static struct raid_bdev *
1262 0 : raid_bdev_find_by_uuid(const struct spdk_uuid *uuid)
1263 : {
1264 : struct raid_bdev *raid_bdev;
1265 :
1266 0 : TAILQ_FOREACH(raid_bdev, &g_raid_bdev_list, global_link) {
1267 0 : if (spdk_uuid_compare(&raid_bdev->bdev.uuid, uuid) == 0) {
1268 0 : return raid_bdev;
1269 : }
1270 : }
1271 :
1272 0 : return NULL;
1273 : }
1274 :
1275 : static struct {
1276 : const char *name;
1277 : enum raid_level value;
1278 : } g_raid_level_names[] = {
1279 : { "raid0", RAID0 },
1280 : { "0", RAID0 },
1281 : { "raid1", RAID1 },
1282 : { "1", RAID1 },
1283 : { "raid5f", RAID5F },
1284 : { "5f", RAID5F },
1285 : { "concat", CONCAT },
1286 : { }
1287 : };
1288 :
1289 : const char *g_raid_state_names[] = {
1290 : [RAID_BDEV_STATE_ONLINE] = "online",
1291 : [RAID_BDEV_STATE_CONFIGURING] = "configuring",
1292 : [RAID_BDEV_STATE_OFFLINE] = "offline",
1293 : [RAID_BDEV_STATE_MAX] = NULL
1294 : };
1295 :
1296 : static const char *g_raid_process_type_names[] = {
1297 : [RAID_PROCESS_NONE] = "none",
1298 : [RAID_PROCESS_REBUILD] = "rebuild",
1299 : [RAID_PROCESS_MAX] = NULL
1300 : };
1301 :
1302 : /* We have to use the typedef in the function declaration to appease astyle. */
1303 : typedef enum raid_level raid_level_t;
1304 : typedef enum raid_bdev_state raid_bdev_state_t;
1305 :
1306 : raid_level_t
1307 4 : raid_bdev_str_to_level(const char *str)
1308 : {
1309 : unsigned int i;
1310 :
1311 4 : assert(str != NULL);
1312 :
1313 12 : for (i = 0; g_raid_level_names[i].name != NULL; i++) {
1314 11 : if (strcasecmp(g_raid_level_names[i].name, str) == 0) {
1315 3 : return g_raid_level_names[i].value;
1316 : }
1317 : }
1318 :
1319 1 : return INVALID_RAID_LEVEL;
1320 : }
1321 :
1322 : const char *
1323 11 : raid_bdev_level_to_str(enum raid_level level)
1324 : {
1325 : unsigned int i;
1326 :
1327 81 : for (i = 0; g_raid_level_names[i].name != NULL; i++) {
1328 71 : if (g_raid_level_names[i].value == level) {
1329 1 : return g_raid_level_names[i].name;
1330 : }
1331 : }
1332 :
1333 10 : return "";
1334 : }
1335 :
1336 : raid_bdev_state_t
1337 6 : raid_bdev_str_to_state(const char *str)
1338 : {
1339 : unsigned int i;
1340 :
1341 6 : assert(str != NULL);
1342 :
1343 18 : for (i = 0; i < RAID_BDEV_STATE_MAX; i++) {
1344 15 : if (strcasecmp(g_raid_state_names[i], str) == 0) {
1345 3 : break;
1346 : }
1347 : }
1348 :
1349 6 : return i;
1350 : }
1351 :
1352 : const char *
1353 7 : raid_bdev_state_to_str(enum raid_bdev_state state)
1354 : {
1355 7 : if (state >= RAID_BDEV_STATE_MAX) {
1356 0 : return "";
1357 : }
1358 :
1359 7 : return g_raid_state_names[state];
1360 : }
1361 :
1362 : const char *
1363 6 : raid_bdev_process_to_str(enum raid_process_type value)
1364 : {
1365 6 : if (value >= RAID_PROCESS_MAX) {
1366 0 : return "";
1367 : }
1368 :
1369 6 : return g_raid_process_type_names[value];
1370 : }
1371 :
1372 : /*
1373 : * brief:
1374 : * raid_bdev_fini_start is called when bdev layer is starting the
1375 : * shutdown process
1376 : * params:
1377 : * none
1378 : * returns:
1379 : * none
1380 : */
1381 : static void
1382 0 : raid_bdev_fini_start(void)
1383 : {
1384 : struct raid_bdev *raid_bdev;
1385 : struct raid_base_bdev_info *base_info;
1386 :
1387 0 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_fini_start\n");
1388 :
1389 0 : TAILQ_FOREACH(raid_bdev, &g_raid_bdev_list, global_link) {
1390 0 : if (raid_bdev->state != RAID_BDEV_STATE_ONLINE) {
1391 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1392 0 : raid_bdev_free_base_bdev_resource(base_info);
1393 : }
1394 : }
1395 : }
1396 :
1397 0 : g_shutdown_started = true;
1398 0 : }
1399 :
1400 : /*
1401 : * brief:
1402 : * raid_bdev_exit is called on raid bdev module exit time by bdev layer
1403 : * params:
1404 : * none
1405 : * returns:
1406 : * none
1407 : */
1408 : static void
1409 12 : raid_bdev_exit(void)
1410 : {
1411 : struct raid_bdev *raid_bdev, *tmp;
1412 :
1413 12 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_exit\n");
1414 :
1415 12 : TAILQ_FOREACH_SAFE(raid_bdev, &g_raid_bdev_list, global_link, tmp) {
1416 0 : raid_bdev_cleanup_and_free(raid_bdev);
1417 : }
1418 12 : }
1419 :
1420 : static void
1421 0 : raid_bdev_opts_config_json(struct spdk_json_write_ctx *w)
1422 : {
1423 0 : spdk_json_write_object_begin(w);
1424 :
1425 0 : spdk_json_write_named_string(w, "method", "bdev_raid_set_options");
1426 :
1427 0 : spdk_json_write_named_object_begin(w, "params");
1428 0 : spdk_json_write_named_uint32(w, "process_window_size_kb", g_opts.process_window_size_kb);
1429 0 : spdk_json_write_named_uint32(w, "process_max_bandwidth_mb_sec",
1430 : g_opts.process_max_bandwidth_mb_sec);
1431 0 : spdk_json_write_object_end(w);
1432 :
1433 0 : spdk_json_write_object_end(w);
1434 0 : }
1435 :
1436 : static int
1437 0 : raid_bdev_config_json(struct spdk_json_write_ctx *w)
1438 : {
1439 0 : raid_bdev_opts_config_json(w);
1440 :
1441 0 : return 0;
1442 : }
1443 :
1444 : /*
1445 : * brief:
1446 : * raid_bdev_get_ctx_size is used to return the context size of bdev_io for raid
1447 : * module
1448 : * params:
1449 : * none
1450 : * returns:
1451 : * size of spdk_bdev_io context for raid
1452 : */
1453 : static int
1454 1 : raid_bdev_get_ctx_size(void)
1455 : {
1456 1 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_get_ctx_size\n");
1457 1 : return sizeof(struct raid_bdev_io);
1458 : }
1459 :
1460 : static struct spdk_bdev_module g_raid_if = {
1461 : .name = "raid",
1462 : .module_init = raid_bdev_init,
1463 : .fini_start = raid_bdev_fini_start,
1464 : .module_fini = raid_bdev_exit,
1465 : .config_json = raid_bdev_config_json,
1466 : .get_ctx_size = raid_bdev_get_ctx_size,
1467 : .examine_disk = raid_bdev_examine,
1468 : .async_init = false,
1469 : .async_fini = false,
1470 : };
1471 1 : SPDK_BDEV_MODULE_REGISTER(raid, &g_raid_if)
1472 :
1473 : /*
1474 : * brief:
1475 : * raid_bdev_init is the initialization function for raid bdev module
1476 : * params:
1477 : * none
1478 : * returns:
1479 : * 0 - success
1480 : * non zero - failure
1481 : */
1482 : static int
1483 12 : raid_bdev_init(void)
1484 : {
1485 12 : return 0;
1486 : }
1487 :
1488 : static int
1489 20 : _raid_bdev_create(const char *name, uint32_t strip_size, uint8_t num_base_bdevs,
1490 : enum raid_level level, bool superblock_enabled, const struct spdk_uuid *uuid,
1491 : struct raid_bdev **raid_bdev_out)
1492 : {
1493 : struct raid_bdev *raid_bdev;
1494 : struct spdk_bdev *raid_bdev_gen;
1495 : struct raid_bdev_module *module;
1496 : struct raid_base_bdev_info *base_info;
1497 : uint8_t min_operational;
1498 :
1499 20 : if (strnlen(name, RAID_BDEV_SB_NAME_SIZE) == RAID_BDEV_SB_NAME_SIZE) {
1500 0 : SPDK_ERRLOG("Raid bdev name '%s' exceeds %d characters\n", name, RAID_BDEV_SB_NAME_SIZE - 1);
1501 0 : return -EINVAL;
1502 : }
1503 :
1504 20 : if (raid_bdev_find_by_name(name) != NULL) {
1505 1 : SPDK_ERRLOG("Duplicate raid bdev name found: %s\n", name);
1506 1 : return -EEXIST;
1507 : }
1508 :
1509 19 : if (level == RAID1) {
1510 0 : if (strip_size != 0) {
1511 0 : SPDK_ERRLOG("Strip size is not supported by raid1\n");
1512 0 : return -EINVAL;
1513 : }
1514 19 : } else if (spdk_u32_is_pow2(strip_size) == false) {
1515 1 : SPDK_ERRLOG("Invalid strip size %" PRIu32 "\n", strip_size);
1516 1 : return -EINVAL;
1517 : }
1518 :
1519 18 : module = raid_bdev_module_find(level);
1520 18 : if (module == NULL) {
1521 1 : SPDK_ERRLOG("Unsupported raid level '%d'\n", level);
1522 1 : return -EINVAL;
1523 : }
1524 :
1525 17 : assert(module->base_bdevs_min != 0);
1526 17 : if (num_base_bdevs < module->base_bdevs_min) {
1527 0 : SPDK_ERRLOG("At least %u base devices required for %s\n",
1528 : module->base_bdevs_min,
1529 : raid_bdev_level_to_str(level));
1530 0 : return -EINVAL;
1531 : }
1532 :
1533 17 : switch (module->base_bdevs_constraint.type) {
1534 0 : case CONSTRAINT_MAX_BASE_BDEVS_REMOVED:
1535 0 : min_operational = num_base_bdevs - module->base_bdevs_constraint.value;
1536 0 : break;
1537 0 : case CONSTRAINT_MIN_BASE_BDEVS_OPERATIONAL:
1538 0 : min_operational = module->base_bdevs_constraint.value;
1539 0 : break;
1540 17 : case CONSTRAINT_UNSET:
1541 17 : if (module->base_bdevs_constraint.value != 0) {
1542 0 : SPDK_ERRLOG("Unexpected constraint value '%u' provided for raid bdev '%s'.\n",
1543 : (uint8_t)module->base_bdevs_constraint.value, name);
1544 0 : return -EINVAL;
1545 : }
1546 17 : min_operational = num_base_bdevs;
1547 17 : break;
1548 0 : default:
1549 0 : SPDK_ERRLOG("Unrecognised constraint type '%u' in module for raid level '%s'.\n",
1550 : (uint8_t)module->base_bdevs_constraint.type,
1551 : raid_bdev_level_to_str(module->level));
1552 0 : return -EINVAL;
1553 : };
1554 :
1555 17 : if (min_operational == 0 || min_operational > num_base_bdevs) {
1556 0 : SPDK_ERRLOG("Wrong constraint value for raid level '%s'.\n",
1557 : raid_bdev_level_to_str(module->level));
1558 0 : return -EINVAL;
1559 : }
1560 :
1561 17 : raid_bdev = calloc(1, sizeof(*raid_bdev));
1562 17 : if (!raid_bdev) {
1563 0 : SPDK_ERRLOG("Unable to allocate memory for raid bdev\n");
1564 0 : return -ENOMEM;
1565 : }
1566 :
1567 17 : raid_bdev->module = module;
1568 17 : raid_bdev->num_base_bdevs = num_base_bdevs;
1569 17 : raid_bdev->base_bdev_info = calloc(raid_bdev->num_base_bdevs,
1570 : sizeof(struct raid_base_bdev_info));
1571 17 : if (!raid_bdev->base_bdev_info) {
1572 0 : SPDK_ERRLOG("Unable able to allocate base bdev info\n");
1573 0 : raid_bdev_free(raid_bdev);
1574 0 : return -ENOMEM;
1575 : }
1576 :
1577 561 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1578 544 : base_info->raid_bdev = raid_bdev;
1579 : }
1580 :
1581 : /* strip_size_kb is from the rpc param. strip_size is in blocks and used
1582 : * internally and set later.
1583 : */
1584 17 : raid_bdev->strip_size = 0;
1585 17 : raid_bdev->strip_size_kb = strip_size;
1586 17 : raid_bdev->state = RAID_BDEV_STATE_CONFIGURING;
1587 17 : raid_bdev->level = level;
1588 17 : raid_bdev->min_base_bdevs_operational = min_operational;
1589 17 : raid_bdev->superblock_enabled = superblock_enabled;
1590 :
1591 17 : raid_bdev_gen = &raid_bdev->bdev;
1592 :
1593 17 : raid_bdev_gen->name = strdup(name);
1594 17 : if (!raid_bdev_gen->name) {
1595 0 : SPDK_ERRLOG("Unable to allocate name for raid\n");
1596 0 : raid_bdev_free(raid_bdev);
1597 0 : return -ENOMEM;
1598 : }
1599 :
1600 17 : raid_bdev_gen->product_name = "Raid Volume";
1601 17 : raid_bdev_gen->ctxt = raid_bdev;
1602 17 : raid_bdev_gen->fn_table = &g_raid_bdev_fn_table;
1603 17 : raid_bdev_gen->module = &g_raid_if;
1604 17 : raid_bdev_gen->write_cache = 0;
1605 17 : spdk_uuid_copy(&raid_bdev_gen->uuid, uuid);
1606 :
1607 17 : TAILQ_INSERT_TAIL(&g_raid_bdev_list, raid_bdev, global_link);
1608 :
1609 17 : *raid_bdev_out = raid_bdev;
1610 :
1611 17 : return 0;
1612 : }
1613 :
1614 : /*
1615 : * brief:
1616 : * raid_bdev_create allocates raid bdev based on passed configuration
1617 : * params:
1618 : * name - name for raid bdev
1619 : * strip_size - strip size in KB
1620 : * num_base_bdevs - number of base bdevs
1621 : * level - raid level
1622 : * superblock_enabled - true if raid should have superblock
1623 : * uuid - uuid to set for the bdev
1624 : * raid_bdev_out - the created raid bdev
1625 : * returns:
1626 : * 0 - success
1627 : * non zero - failure
1628 : */
1629 : int
1630 20 : raid_bdev_create(const char *name, uint32_t strip_size, uint8_t num_base_bdevs,
1631 : enum raid_level level, bool superblock_enabled, const struct spdk_uuid *uuid,
1632 : struct raid_bdev **raid_bdev_out)
1633 : {
1634 20 : struct raid_bdev *raid_bdev;
1635 : int rc;
1636 :
1637 20 : assert(uuid != NULL);
1638 :
1639 20 : rc = _raid_bdev_create(name, strip_size, num_base_bdevs, level, superblock_enabled, uuid,
1640 : &raid_bdev);
1641 20 : if (rc != 0) {
1642 3 : return rc;
1643 : }
1644 :
1645 17 : if (superblock_enabled && spdk_uuid_is_null(uuid)) {
1646 : /* we need to have the uuid to store in the superblock before the bdev is registered */
1647 1 : spdk_uuid_generate(&raid_bdev->bdev.uuid);
1648 : }
1649 :
1650 17 : raid_bdev->num_base_bdevs_operational = num_base_bdevs;
1651 :
1652 17 : *raid_bdev_out = raid_bdev;
1653 :
1654 17 : return 0;
1655 : }
1656 :
1657 : static void
1658 0 : _raid_bdev_unregistering_cont(void *ctx)
1659 : {
1660 0 : struct raid_bdev *raid_bdev = ctx;
1661 :
1662 0 : spdk_bdev_close(raid_bdev->self_desc);
1663 0 : raid_bdev->self_desc = NULL;
1664 0 : }
1665 :
1666 : static void
1667 0 : raid_bdev_unregistering_cont(void *ctx)
1668 : {
1669 0 : spdk_thread_exec_msg(spdk_thread_get_app_thread(), _raid_bdev_unregistering_cont, ctx);
1670 0 : }
1671 :
1672 : static int
1673 0 : raid_bdev_process_add_finish_action(struct raid_bdev_process *process, spdk_msg_fn cb, void *cb_ctx)
1674 : {
1675 : struct raid_process_finish_action *finish_action;
1676 :
1677 0 : assert(spdk_get_thread() == process->thread);
1678 0 : assert(process->state < RAID_PROCESS_STATE_STOPPED);
1679 :
1680 0 : finish_action = calloc(1, sizeof(*finish_action));
1681 0 : if (finish_action == NULL) {
1682 0 : return -ENOMEM;
1683 : }
1684 :
1685 0 : finish_action->cb = cb;
1686 0 : finish_action->cb_ctx = cb_ctx;
1687 :
1688 0 : TAILQ_INSERT_TAIL(&process->finish_actions, finish_action, link);
1689 :
1690 0 : return 0;
1691 : }
1692 :
1693 : static void
1694 0 : raid_bdev_unregistering_stop_process(void *ctx)
1695 : {
1696 0 : struct raid_bdev_process *process = ctx;
1697 0 : struct raid_bdev *raid_bdev = process->raid_bdev;
1698 : int rc;
1699 :
1700 0 : process->state = RAID_PROCESS_STATE_STOPPING;
1701 0 : if (process->status == 0) {
1702 0 : process->status = -ECANCELED;
1703 : }
1704 :
1705 0 : rc = raid_bdev_process_add_finish_action(process, raid_bdev_unregistering_cont, raid_bdev);
1706 0 : if (rc != 0) {
1707 0 : SPDK_ERRLOG("Failed to add raid bdev '%s' process finish action: %s\n",
1708 : raid_bdev->bdev.name, spdk_strerror(-rc));
1709 : }
1710 0 : }
1711 :
1712 : static void
1713 0 : raid_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *event_ctx)
1714 : {
1715 0 : struct raid_bdev *raid_bdev = event_ctx;
1716 :
1717 0 : if (type == SPDK_BDEV_EVENT_REMOVE) {
1718 0 : if (raid_bdev->process != NULL) {
1719 0 : spdk_thread_send_msg(raid_bdev->process->thread, raid_bdev_unregistering_stop_process,
1720 0 : raid_bdev->process);
1721 : } else {
1722 0 : raid_bdev_unregistering_cont(raid_bdev);
1723 : }
1724 : }
1725 0 : }
1726 :
1727 : static void
1728 14 : raid_bdev_configure_cont(struct raid_bdev *raid_bdev)
1729 : {
1730 14 : struct spdk_bdev *raid_bdev_gen = &raid_bdev->bdev;
1731 : int rc;
1732 :
1733 14 : raid_bdev->state = RAID_BDEV_STATE_ONLINE;
1734 14 : SPDK_DEBUGLOG(bdev_raid, "io device register %p\n", raid_bdev);
1735 14 : SPDK_DEBUGLOG(bdev_raid, "blockcnt %" PRIu64 ", blocklen %u\n",
1736 : raid_bdev_gen->blockcnt, raid_bdev_gen->blocklen);
1737 14 : spdk_io_device_register(raid_bdev, raid_bdev_create_cb, raid_bdev_destroy_cb,
1738 : sizeof(struct raid_bdev_io_channel),
1739 14 : raid_bdev_gen->name);
1740 14 : rc = spdk_bdev_register(raid_bdev_gen);
1741 14 : if (rc != 0) {
1742 0 : SPDK_ERRLOG("Failed to register raid bdev '%s': %s\n",
1743 : raid_bdev_gen->name, spdk_strerror(-rc));
1744 0 : goto out;
1745 : }
1746 :
1747 : /*
1748 : * Open the bdev internally to delay unregistering if we need to stop a background process
1749 : * first. The process may still need to unquiesce a range but it will fail because the
1750 : * bdev's internal.spinlock is destroyed by the time the destruct callback is reached.
1751 : * During application shutdown, bdevs automatically get unregistered by the bdev layer
1752 : * so this is the only way currently to do this correctly.
1753 : * TODO: try to handle this correctly in bdev layer instead.
1754 : */
1755 14 : rc = spdk_bdev_open_ext(raid_bdev_gen->name, false, raid_bdev_event_cb, raid_bdev,
1756 : &raid_bdev->self_desc);
1757 14 : if (rc != 0) {
1758 0 : SPDK_ERRLOG("Failed to open raid bdev '%s': %s\n",
1759 : raid_bdev_gen->name, spdk_strerror(-rc));
1760 0 : spdk_bdev_unregister(raid_bdev_gen, NULL, NULL);
1761 0 : goto out;
1762 : }
1763 :
1764 14 : SPDK_DEBUGLOG(bdev_raid, "raid bdev generic %p\n", raid_bdev_gen);
1765 14 : SPDK_DEBUGLOG(bdev_raid, "raid bdev is created with name %s, raid_bdev %p\n",
1766 : raid_bdev_gen->name, raid_bdev);
1767 14 : out:
1768 14 : if (rc != 0) {
1769 0 : if (raid_bdev->module->stop != NULL) {
1770 0 : raid_bdev->module->stop(raid_bdev);
1771 : }
1772 0 : spdk_io_device_unregister(raid_bdev, NULL);
1773 0 : raid_bdev->state = RAID_BDEV_STATE_CONFIGURING;
1774 : }
1775 :
1776 14 : if (raid_bdev->configure_cb != NULL) {
1777 14 : raid_bdev->configure_cb(raid_bdev->configure_cb_ctx, rc);
1778 14 : raid_bdev->configure_cb = NULL;
1779 : }
1780 14 : }
1781 :
1782 : static void
1783 1 : raid_bdev_configure_write_sb_cb(int status, struct raid_bdev *raid_bdev, void *ctx)
1784 : {
1785 1 : if (status == 0) {
1786 1 : raid_bdev_configure_cont(raid_bdev);
1787 : } else {
1788 0 : SPDK_ERRLOG("Failed to write raid bdev '%s' superblock: %s\n",
1789 : raid_bdev->bdev.name, spdk_strerror(-status));
1790 0 : if (raid_bdev->module->stop != NULL) {
1791 0 : raid_bdev->module->stop(raid_bdev);
1792 : }
1793 0 : if (raid_bdev->configure_cb != NULL) {
1794 0 : raid_bdev->configure_cb(raid_bdev->configure_cb_ctx, status);
1795 0 : raid_bdev->configure_cb = NULL;
1796 : }
1797 : }
1798 1 : }
1799 :
1800 : /*
1801 : * brief:
1802 : * If raid bdev config is complete, then only register the raid bdev to
1803 : * bdev layer and remove this raid bdev from configuring list and
1804 : * insert the raid bdev to configured list
1805 : * params:
1806 : * raid_bdev - pointer to raid bdev
1807 : * returns:
1808 : * 0 - success
1809 : * non zero - failure
1810 : */
1811 : static int
1812 14 : raid_bdev_configure(struct raid_bdev *raid_bdev, raid_bdev_configure_cb cb, void *cb_ctx)
1813 : {
1814 14 : uint32_t data_block_size = spdk_bdev_get_data_block_size(&raid_bdev->bdev);
1815 : int rc;
1816 :
1817 14 : assert(raid_bdev->state == RAID_BDEV_STATE_CONFIGURING);
1818 14 : assert(raid_bdev->num_base_bdevs_discovered == raid_bdev->num_base_bdevs_operational);
1819 14 : assert(raid_bdev->bdev.blocklen > 0);
1820 :
1821 : /* The strip_size_kb is read in from user in KB. Convert to blocks here for
1822 : * internal use.
1823 : */
1824 14 : raid_bdev->strip_size = (raid_bdev->strip_size_kb * 1024) / data_block_size;
1825 14 : if (raid_bdev->strip_size == 0 && raid_bdev->level != RAID1) {
1826 0 : SPDK_ERRLOG("Strip size cannot be smaller than the device block size\n");
1827 0 : return -EINVAL;
1828 : }
1829 14 : raid_bdev->strip_size_shift = spdk_u32log2(raid_bdev->strip_size);
1830 :
1831 14 : rc = raid_bdev->module->start(raid_bdev);
1832 14 : if (rc != 0) {
1833 0 : SPDK_ERRLOG("raid module startup callback failed\n");
1834 0 : return rc;
1835 : }
1836 :
1837 14 : assert(raid_bdev->configure_cb == NULL);
1838 14 : raid_bdev->configure_cb = cb;
1839 14 : raid_bdev->configure_cb_ctx = cb_ctx;
1840 :
1841 14 : if (raid_bdev->superblock_enabled) {
1842 1 : if (raid_bdev->sb == NULL) {
1843 1 : rc = raid_bdev_alloc_superblock(raid_bdev, data_block_size);
1844 1 : if (rc == 0) {
1845 1 : raid_bdev_init_superblock(raid_bdev);
1846 : }
1847 : } else {
1848 0 : assert(spdk_uuid_compare(&raid_bdev->sb->uuid, &raid_bdev->bdev.uuid) == 0);
1849 0 : if (raid_bdev->sb->block_size != data_block_size) {
1850 0 : SPDK_ERRLOG("blocklen does not match value in superblock\n");
1851 0 : rc = -EINVAL;
1852 : }
1853 0 : if (raid_bdev->sb->raid_size != raid_bdev->bdev.blockcnt) {
1854 0 : SPDK_ERRLOG("blockcnt does not match value in superblock\n");
1855 0 : rc = -EINVAL;
1856 : }
1857 : }
1858 :
1859 1 : if (rc != 0) {
1860 0 : raid_bdev->configure_cb = NULL;
1861 0 : if (raid_bdev->module->stop != NULL) {
1862 0 : raid_bdev->module->stop(raid_bdev);
1863 : }
1864 0 : return rc;
1865 : }
1866 :
1867 1 : raid_bdev_write_superblock(raid_bdev, raid_bdev_configure_write_sb_cb, NULL);
1868 : } else {
1869 13 : raid_bdev_configure_cont(raid_bdev);
1870 : }
1871 :
1872 14 : return 0;
1873 : }
1874 :
1875 : /*
1876 : * brief:
1877 : * If raid bdev is online and registered, change the bdev state to
1878 : * configuring and unregister this raid device. Queue this raid device
1879 : * in configuring list
1880 : * params:
1881 : * raid_bdev - pointer to raid bdev
1882 : * cb_fn - callback function
1883 : * cb_arg - argument to callback function
1884 : * returns:
1885 : * none
1886 : */
1887 : static void
1888 14 : raid_bdev_deconfigure(struct raid_bdev *raid_bdev, raid_bdev_destruct_cb cb_fn,
1889 : void *cb_arg)
1890 : {
1891 14 : if (raid_bdev->state != RAID_BDEV_STATE_ONLINE) {
1892 0 : if (cb_fn) {
1893 0 : cb_fn(cb_arg, 0);
1894 : }
1895 0 : return;
1896 : }
1897 :
1898 14 : raid_bdev->state = RAID_BDEV_STATE_OFFLINE;
1899 14 : SPDK_DEBUGLOG(bdev_raid, "raid bdev state changing from online to offline\n");
1900 :
1901 14 : spdk_bdev_unregister(&raid_bdev->bdev, cb_fn, cb_arg);
1902 : }
1903 :
1904 : /*
1905 : * brief:
1906 : * raid_bdev_find_base_info_by_bdev function finds the base bdev info by bdev.
1907 : * params:
1908 : * base_bdev - pointer to base bdev
1909 : * returns:
1910 : * base bdev info if found, otherwise NULL.
1911 : */
1912 : static struct raid_base_bdev_info *
1913 0 : raid_bdev_find_base_info_by_bdev(struct spdk_bdev *base_bdev)
1914 : {
1915 : struct raid_bdev *raid_bdev;
1916 : struct raid_base_bdev_info *base_info;
1917 :
1918 0 : TAILQ_FOREACH(raid_bdev, &g_raid_bdev_list, global_link) {
1919 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
1920 0 : if (base_info->desc != NULL &&
1921 0 : spdk_bdev_desc_get_bdev(base_info->desc) == base_bdev) {
1922 0 : return base_info;
1923 : }
1924 : }
1925 : }
1926 :
1927 0 : return NULL;
1928 : }
1929 :
1930 : static void
1931 0 : raid_bdev_remove_base_bdev_done(struct raid_base_bdev_info *base_info, int status)
1932 : {
1933 0 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
1934 :
1935 0 : assert(base_info->remove_scheduled);
1936 0 : base_info->remove_scheduled = false;
1937 :
1938 0 : if (status == 0) {
1939 0 : raid_bdev->num_base_bdevs_operational--;
1940 0 : if (raid_bdev->num_base_bdevs_operational < raid_bdev->min_base_bdevs_operational) {
1941 : /* There is not enough base bdevs to keep the raid bdev operational. */
1942 0 : raid_bdev_deconfigure(raid_bdev, base_info->remove_cb, base_info->remove_cb_ctx);
1943 0 : return;
1944 : }
1945 : }
1946 :
1947 0 : if (base_info->remove_cb != NULL) {
1948 0 : base_info->remove_cb(base_info->remove_cb_ctx, status);
1949 : }
1950 : }
1951 :
1952 : static void
1953 0 : raid_bdev_remove_base_bdev_on_unquiesced(void *ctx, int status)
1954 : {
1955 0 : struct raid_base_bdev_info *base_info = ctx;
1956 0 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
1957 :
1958 0 : if (status != 0) {
1959 0 : SPDK_ERRLOG("Failed to unquiesce raid bdev %s: %s\n",
1960 : raid_bdev->bdev.name, spdk_strerror(-status));
1961 : }
1962 :
1963 0 : raid_bdev_remove_base_bdev_done(base_info, status);
1964 0 : }
1965 :
1966 : static void
1967 0 : raid_bdev_channel_remove_base_bdev(struct spdk_io_channel_iter *i)
1968 : {
1969 0 : struct raid_base_bdev_info *base_info = spdk_io_channel_iter_get_ctx(i);
1970 0 : struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
1971 0 : struct raid_bdev_io_channel *raid_ch = spdk_io_channel_get_ctx(ch);
1972 0 : uint8_t idx = raid_bdev_base_bdev_slot(base_info);
1973 :
1974 0 : SPDK_DEBUGLOG(bdev_raid, "slot: %u raid_ch: %p\n", idx, raid_ch);
1975 :
1976 0 : if (raid_ch->base_channel[idx] != NULL) {
1977 0 : spdk_put_io_channel(raid_ch->base_channel[idx]);
1978 0 : raid_ch->base_channel[idx] = NULL;
1979 : }
1980 :
1981 0 : if (raid_ch->process.ch_processed != NULL) {
1982 0 : raid_ch->process.ch_processed->base_channel[idx] = NULL;
1983 : }
1984 :
1985 0 : spdk_for_each_channel_continue(i, 0);
1986 0 : }
1987 :
1988 : static void
1989 0 : raid_bdev_channels_remove_base_bdev_done(struct spdk_io_channel_iter *i, int status)
1990 : {
1991 0 : struct raid_base_bdev_info *base_info = spdk_io_channel_iter_get_ctx(i);
1992 0 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
1993 :
1994 0 : raid_bdev_free_base_bdev_resource(base_info);
1995 :
1996 0 : spdk_bdev_unquiesce(&raid_bdev->bdev, &g_raid_if, raid_bdev_remove_base_bdev_on_unquiesced,
1997 : base_info);
1998 0 : }
1999 :
2000 : static void
2001 0 : raid_bdev_remove_base_bdev_cont(struct raid_base_bdev_info *base_info)
2002 : {
2003 0 : raid_bdev_deconfigure_base_bdev(base_info);
2004 :
2005 0 : spdk_for_each_channel(base_info->raid_bdev, raid_bdev_channel_remove_base_bdev, base_info,
2006 : raid_bdev_channels_remove_base_bdev_done);
2007 0 : }
2008 :
2009 : static void
2010 0 : raid_bdev_remove_base_bdev_write_sb_cb(int status, struct raid_bdev *raid_bdev, void *ctx)
2011 : {
2012 0 : struct raid_base_bdev_info *base_info = ctx;
2013 :
2014 0 : if (status != 0) {
2015 0 : SPDK_ERRLOG("Failed to write raid bdev '%s' superblock: %s\n",
2016 : raid_bdev->bdev.name, spdk_strerror(-status));
2017 0 : raid_bdev_remove_base_bdev_done(base_info, status);
2018 0 : return;
2019 : }
2020 :
2021 0 : raid_bdev_remove_base_bdev_cont(base_info);
2022 : }
2023 :
2024 : static void
2025 0 : raid_bdev_remove_base_bdev_on_quiesced(void *ctx, int status)
2026 : {
2027 0 : struct raid_base_bdev_info *base_info = ctx;
2028 0 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
2029 :
2030 0 : if (status != 0) {
2031 0 : SPDK_ERRLOG("Failed to quiesce raid bdev %s: %s\n",
2032 : raid_bdev->bdev.name, spdk_strerror(-status));
2033 0 : raid_bdev_remove_base_bdev_done(base_info, status);
2034 0 : return;
2035 : }
2036 :
2037 0 : if (raid_bdev->sb) {
2038 0 : struct raid_bdev_superblock *sb = raid_bdev->sb;
2039 0 : uint8_t slot = raid_bdev_base_bdev_slot(base_info);
2040 : uint8_t i;
2041 :
2042 0 : for (i = 0; i < sb->base_bdevs_size; i++) {
2043 0 : struct raid_bdev_sb_base_bdev *sb_base_bdev = &sb->base_bdevs[i];
2044 :
2045 0 : if (sb_base_bdev->state == RAID_SB_BASE_BDEV_CONFIGURED &&
2046 0 : sb_base_bdev->slot == slot) {
2047 0 : if (base_info->is_failed) {
2048 0 : sb_base_bdev->state = RAID_SB_BASE_BDEV_FAILED;
2049 : } else {
2050 0 : sb_base_bdev->state = RAID_SB_BASE_BDEV_MISSING;
2051 : }
2052 :
2053 0 : raid_bdev_write_superblock(raid_bdev, raid_bdev_remove_base_bdev_write_sb_cb, base_info);
2054 0 : return;
2055 : }
2056 : }
2057 : }
2058 :
2059 0 : raid_bdev_remove_base_bdev_cont(base_info);
2060 : }
2061 :
2062 : static int
2063 0 : raid_bdev_remove_base_bdev_quiesce(struct raid_base_bdev_info *base_info)
2064 : {
2065 0 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
2066 :
2067 0 : return spdk_bdev_quiesce(&base_info->raid_bdev->bdev, &g_raid_if,
2068 : raid_bdev_remove_base_bdev_on_quiesced, base_info);
2069 : }
2070 :
2071 : struct raid_bdev_process_base_bdev_remove_ctx {
2072 : struct raid_bdev_process *process;
2073 : struct raid_base_bdev_info *base_info;
2074 : uint8_t num_base_bdevs_operational;
2075 : };
2076 :
2077 : static void
2078 0 : _raid_bdev_process_base_bdev_remove_cont(void *ctx)
2079 : {
2080 0 : struct raid_base_bdev_info *base_info = ctx;
2081 : int ret;
2082 :
2083 0 : ret = raid_bdev_remove_base_bdev_quiesce(base_info);
2084 0 : if (ret != 0) {
2085 0 : raid_bdev_remove_base_bdev_done(base_info, ret);
2086 : }
2087 0 : }
2088 :
2089 : static void
2090 0 : raid_bdev_process_base_bdev_remove_cont(void *_ctx)
2091 : {
2092 0 : struct raid_bdev_process_base_bdev_remove_ctx *ctx = _ctx;
2093 0 : struct raid_base_bdev_info *base_info = ctx->base_info;
2094 :
2095 0 : free(ctx);
2096 :
2097 0 : spdk_thread_send_msg(spdk_thread_get_app_thread(), _raid_bdev_process_base_bdev_remove_cont,
2098 : base_info);
2099 0 : }
2100 :
2101 : static void
2102 0 : _raid_bdev_process_base_bdev_remove(void *_ctx)
2103 : {
2104 0 : struct raid_bdev_process_base_bdev_remove_ctx *ctx = _ctx;
2105 0 : struct raid_bdev_process *process = ctx->process;
2106 : int ret;
2107 :
2108 0 : if (ctx->base_info != process->target &&
2109 0 : ctx->num_base_bdevs_operational > process->raid_bdev->min_base_bdevs_operational) {
2110 : /* process doesn't need to be stopped */
2111 0 : raid_bdev_process_base_bdev_remove_cont(ctx);
2112 0 : return;
2113 : }
2114 :
2115 0 : assert(process->state > RAID_PROCESS_STATE_INIT &&
2116 : process->state < RAID_PROCESS_STATE_STOPPED);
2117 :
2118 0 : ret = raid_bdev_process_add_finish_action(process, raid_bdev_process_base_bdev_remove_cont, ctx);
2119 0 : if (ret != 0) {
2120 0 : raid_bdev_remove_base_bdev_done(ctx->base_info, ret);
2121 0 : free(ctx);
2122 0 : return;
2123 : }
2124 :
2125 0 : process->state = RAID_PROCESS_STATE_STOPPING;
2126 :
2127 0 : if (process->status == 0) {
2128 0 : process->status = -ENODEV;
2129 : }
2130 : }
2131 :
2132 : static int
2133 0 : raid_bdev_process_base_bdev_remove(struct raid_bdev_process *process,
2134 : struct raid_base_bdev_info *base_info)
2135 : {
2136 : struct raid_bdev_process_base_bdev_remove_ctx *ctx;
2137 :
2138 0 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
2139 :
2140 0 : ctx = calloc(1, sizeof(*ctx));
2141 0 : if (ctx == NULL) {
2142 0 : return -ENOMEM;
2143 : }
2144 :
2145 : /*
2146 : * We have to send the process and num_base_bdevs_operational in the message ctx
2147 : * because the process thread should not access raid_bdev's properties. Particularly,
2148 : * raid_bdev->process may be cleared by the time the message is handled, but ctx->process
2149 : * will still be valid until the process is fully stopped.
2150 : */
2151 0 : ctx->base_info = base_info;
2152 0 : ctx->process = process;
2153 : /*
2154 : * raid_bdev->num_base_bdevs_operational can't be used here because it is decremented
2155 : * after the removal and more than one base bdev may be removed at the same time
2156 : */
2157 0 : RAID_FOR_EACH_BASE_BDEV(process->raid_bdev, base_info) {
2158 0 : if (base_info->is_configured && !base_info->remove_scheduled) {
2159 0 : ctx->num_base_bdevs_operational++;
2160 : }
2161 : }
2162 :
2163 0 : spdk_thread_send_msg(process->thread, _raid_bdev_process_base_bdev_remove, ctx);
2164 :
2165 0 : return 0;
2166 : }
2167 :
2168 : static int
2169 0 : _raid_bdev_remove_base_bdev(struct raid_base_bdev_info *base_info,
2170 : raid_base_bdev_cb cb_fn, void *cb_ctx)
2171 : {
2172 0 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
2173 0 : int ret = 0;
2174 :
2175 0 : SPDK_DEBUGLOG(bdev_raid, "%s\n", base_info->name);
2176 :
2177 0 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
2178 :
2179 0 : if (base_info->remove_scheduled || !base_info->is_configured) {
2180 0 : return -ENODEV;
2181 : }
2182 :
2183 0 : assert(base_info->desc);
2184 0 : base_info->remove_scheduled = true;
2185 :
2186 0 : if (raid_bdev->state != RAID_BDEV_STATE_ONLINE) {
2187 : /*
2188 : * As raid bdev is not registered yet or already unregistered,
2189 : * so cleanup should be done here itself.
2190 : *
2191 : * Removing a base bdev at this stage does not change the number of operational
2192 : * base bdevs, only the number of discovered base bdevs.
2193 : */
2194 0 : raid_bdev_free_base_bdev_resource(base_info);
2195 0 : base_info->remove_scheduled = false;
2196 0 : if (raid_bdev->num_base_bdevs_discovered == 0 &&
2197 0 : raid_bdev->state == RAID_BDEV_STATE_OFFLINE) {
2198 : /* There is no base bdev for this raid, so free the raid device. */
2199 0 : raid_bdev_cleanup_and_free(raid_bdev);
2200 : }
2201 0 : if (cb_fn != NULL) {
2202 0 : cb_fn(cb_ctx, 0);
2203 : }
2204 0 : } else if (raid_bdev->min_base_bdevs_operational == raid_bdev->num_base_bdevs) {
2205 : /* This raid bdev does not tolerate removing a base bdev. */
2206 0 : raid_bdev->num_base_bdevs_operational--;
2207 0 : raid_bdev_deconfigure(raid_bdev, cb_fn, cb_ctx);
2208 : } else {
2209 0 : base_info->remove_cb = cb_fn;
2210 0 : base_info->remove_cb_ctx = cb_ctx;
2211 :
2212 0 : if (raid_bdev->process != NULL) {
2213 0 : ret = raid_bdev_process_base_bdev_remove(raid_bdev->process, base_info);
2214 : } else {
2215 0 : ret = raid_bdev_remove_base_bdev_quiesce(base_info);
2216 : }
2217 :
2218 0 : if (ret != 0) {
2219 0 : base_info->remove_scheduled = false;
2220 : }
2221 : }
2222 :
2223 0 : return ret;
2224 : }
2225 :
2226 : /*
2227 : * brief:
2228 : * raid_bdev_remove_base_bdev function is called by below layers when base_bdev
2229 : * is removed. This function checks if this base bdev is part of any raid bdev
2230 : * or not. If yes, it takes necessary action on that particular raid bdev.
2231 : * params:
2232 : * base_bdev - pointer to base bdev which got removed
2233 : * cb_fn - callback function
2234 : * cb_arg - argument to callback function
2235 : * returns:
2236 : * 0 - success
2237 : * non zero - failure
2238 : */
2239 : int
2240 0 : raid_bdev_remove_base_bdev(struct spdk_bdev *base_bdev, raid_base_bdev_cb cb_fn, void *cb_ctx)
2241 : {
2242 : struct raid_base_bdev_info *base_info;
2243 :
2244 : /* Find the raid_bdev which has claimed this base_bdev */
2245 0 : base_info = raid_bdev_find_base_info_by_bdev(base_bdev);
2246 0 : if (!base_info) {
2247 0 : SPDK_ERRLOG("bdev to remove '%s' not found\n", base_bdev->name);
2248 0 : return -ENODEV;
2249 : }
2250 :
2251 0 : return _raid_bdev_remove_base_bdev(base_info, cb_fn, cb_ctx);
2252 : }
2253 :
2254 : static void
2255 0 : raid_bdev_fail_base_remove_cb(void *ctx, int status)
2256 : {
2257 0 : struct raid_base_bdev_info *base_info = ctx;
2258 :
2259 0 : if (status != 0) {
2260 0 : SPDK_WARNLOG("Failed to remove base bdev %s\n", base_info->name);
2261 0 : base_info->is_failed = false;
2262 : }
2263 0 : }
2264 :
2265 : static void
2266 0 : _raid_bdev_fail_base_bdev(void *ctx)
2267 : {
2268 0 : struct raid_base_bdev_info *base_info = ctx;
2269 : int rc;
2270 :
2271 0 : if (base_info->is_failed) {
2272 0 : return;
2273 : }
2274 0 : base_info->is_failed = true;
2275 :
2276 0 : SPDK_NOTICELOG("Failing base bdev in slot %d ('%s') of raid bdev '%s'\n",
2277 : raid_bdev_base_bdev_slot(base_info), base_info->name, base_info->raid_bdev->bdev.name);
2278 :
2279 0 : rc = _raid_bdev_remove_base_bdev(base_info, raid_bdev_fail_base_remove_cb, base_info);
2280 0 : if (rc != 0) {
2281 0 : raid_bdev_fail_base_remove_cb(base_info, rc);
2282 : }
2283 : }
2284 :
2285 : void
2286 0 : raid_bdev_fail_base_bdev(struct raid_base_bdev_info *base_info)
2287 : {
2288 0 : spdk_thread_exec_msg(spdk_thread_get_app_thread(), _raid_bdev_fail_base_bdev, base_info);
2289 0 : }
2290 :
2291 : static void
2292 0 : raid_bdev_resize_write_sb_cb(int status, struct raid_bdev *raid_bdev, void *ctx)
2293 : {
2294 0 : if (status != 0) {
2295 0 : SPDK_ERRLOG("Failed to write raid bdev '%s' superblock after resizing the bdev: %s\n",
2296 : raid_bdev->bdev.name, spdk_strerror(-status));
2297 : }
2298 0 : }
2299 :
2300 : /*
2301 : * brief:
2302 : * raid_bdev_resize_base_bdev function is called by below layers when base_bdev
2303 : * is resized. This function checks if the smallest size of the base_bdevs is changed.
2304 : * If yes, call module handler to resize the raid_bdev if implemented.
2305 : * params:
2306 : * base_bdev - pointer to base bdev which got resized.
2307 : * returns:
2308 : * none
2309 : */
2310 : static void
2311 0 : raid_bdev_resize_base_bdev(struct spdk_bdev *base_bdev)
2312 : {
2313 : struct raid_bdev *raid_bdev;
2314 : struct raid_base_bdev_info *base_info;
2315 : uint64_t blockcnt_old;
2316 :
2317 0 : SPDK_DEBUGLOG(bdev_raid, "raid_bdev_resize_base_bdev\n");
2318 :
2319 0 : base_info = raid_bdev_find_base_info_by_bdev(base_bdev);
2320 :
2321 : /* Find the raid_bdev which has claimed this base_bdev */
2322 0 : if (!base_info) {
2323 0 : SPDK_ERRLOG("raid_bdev whose base_bdev '%s' not found\n", base_bdev->name);
2324 0 : return;
2325 : }
2326 0 : raid_bdev = base_info->raid_bdev;
2327 :
2328 0 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
2329 :
2330 0 : SPDK_NOTICELOG("base_bdev '%s' was resized: old size %" PRIu64 ", new size %" PRIu64 "\n",
2331 : base_bdev->name, base_info->blockcnt, base_bdev->blockcnt);
2332 :
2333 0 : base_info->blockcnt = base_bdev->blockcnt;
2334 :
2335 0 : if (!raid_bdev->module->resize) {
2336 0 : return;
2337 : }
2338 :
2339 0 : blockcnt_old = raid_bdev->bdev.blockcnt;
2340 0 : if (raid_bdev->module->resize(raid_bdev) == false) {
2341 0 : return;
2342 : }
2343 :
2344 0 : SPDK_NOTICELOG("raid bdev '%s': block count was changed from %" PRIu64 " to %" PRIu64 "\n",
2345 : raid_bdev->bdev.name, blockcnt_old, raid_bdev->bdev.blockcnt);
2346 :
2347 0 : if (raid_bdev->superblock_enabled) {
2348 0 : struct raid_bdev_superblock *sb = raid_bdev->sb;
2349 : uint8_t i;
2350 :
2351 0 : for (i = 0; i < sb->base_bdevs_size; i++) {
2352 0 : struct raid_bdev_sb_base_bdev *sb_base_bdev = &sb->base_bdevs[i];
2353 :
2354 0 : if (sb_base_bdev->slot < raid_bdev->num_base_bdevs) {
2355 0 : base_info = &raid_bdev->base_bdev_info[sb_base_bdev->slot];
2356 0 : sb_base_bdev->data_size = base_info->data_size;
2357 : }
2358 : }
2359 0 : sb->raid_size = raid_bdev->bdev.blockcnt;
2360 0 : raid_bdev_write_superblock(raid_bdev, raid_bdev_resize_write_sb_cb, NULL);
2361 : }
2362 : }
2363 :
2364 : /*
2365 : * brief:
2366 : * raid_bdev_event_base_bdev function is called by below layers when base_bdev
2367 : * triggers asynchronous event.
2368 : * params:
2369 : * type - event details.
2370 : * bdev - bdev that triggered event.
2371 : * event_ctx - context for event.
2372 : * returns:
2373 : * none
2374 : */
2375 : static void
2376 0 : raid_bdev_event_base_bdev(enum spdk_bdev_event_type type, struct spdk_bdev *bdev,
2377 : void *event_ctx)
2378 : {
2379 : int rc;
2380 :
2381 0 : switch (type) {
2382 0 : case SPDK_BDEV_EVENT_REMOVE:
2383 0 : rc = raid_bdev_remove_base_bdev(bdev, NULL, NULL);
2384 0 : if (rc != 0) {
2385 0 : SPDK_ERRLOG("Failed to remove base bdev %s: %s\n",
2386 : spdk_bdev_get_name(bdev), spdk_strerror(-rc));
2387 : }
2388 0 : break;
2389 0 : case SPDK_BDEV_EVENT_RESIZE:
2390 0 : raid_bdev_resize_base_bdev(bdev);
2391 0 : break;
2392 0 : default:
2393 0 : SPDK_NOTICELOG("Unsupported bdev event: type %d\n", type);
2394 0 : break;
2395 : }
2396 0 : }
2397 :
2398 : /*
2399 : * brief:
2400 : * Deletes the specified raid bdev
2401 : * params:
2402 : * raid_bdev - pointer to raid bdev
2403 : * cb_fn - callback function
2404 : * cb_arg - argument to callback function
2405 : */
2406 : void
2407 16 : raid_bdev_delete(struct raid_bdev *raid_bdev, raid_bdev_destruct_cb cb_fn, void *cb_arg)
2408 : {
2409 : struct raid_base_bdev_info *base_info;
2410 :
2411 16 : SPDK_DEBUGLOG(bdev_raid, "delete raid bdev: %s\n", raid_bdev->bdev.name);
2412 :
2413 16 : if (raid_bdev->destroy_started) {
2414 0 : SPDK_DEBUGLOG(bdev_raid, "destroying raid bdev %s is already started\n",
2415 : raid_bdev->bdev.name);
2416 0 : if (cb_fn) {
2417 0 : cb_fn(cb_arg, -EALREADY);
2418 : }
2419 0 : return;
2420 : }
2421 :
2422 16 : raid_bdev->destroy_started = true;
2423 :
2424 528 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
2425 512 : base_info->remove_scheduled = true;
2426 :
2427 512 : if (raid_bdev->state != RAID_BDEV_STATE_ONLINE) {
2428 : /*
2429 : * As raid bdev is not registered yet or already unregistered,
2430 : * so cleanup should be done here itself.
2431 : */
2432 64 : raid_bdev_free_base_bdev_resource(base_info);
2433 : }
2434 : }
2435 :
2436 16 : if (raid_bdev->num_base_bdevs_discovered == 0) {
2437 : /* There is no base bdev for this raid, so free the raid device. */
2438 2 : raid_bdev_cleanup_and_free(raid_bdev);
2439 2 : if (cb_fn) {
2440 0 : cb_fn(cb_arg, 0);
2441 : }
2442 : } else {
2443 14 : raid_bdev_deconfigure(raid_bdev, cb_fn, cb_arg);
2444 : }
2445 : }
2446 :
2447 : static void
2448 0 : raid_bdev_process_finish_write_sb_cb(int status, struct raid_bdev *raid_bdev, void *ctx)
2449 : {
2450 0 : if (status != 0) {
2451 0 : SPDK_ERRLOG("Failed to write raid bdev '%s' superblock after background process finished: %s\n",
2452 : raid_bdev->bdev.name, spdk_strerror(-status));
2453 : }
2454 0 : }
2455 :
2456 : static void
2457 0 : raid_bdev_process_finish_write_sb(void *ctx)
2458 : {
2459 0 : struct raid_bdev *raid_bdev = ctx;
2460 0 : struct raid_bdev_superblock *sb = raid_bdev->sb;
2461 : struct raid_bdev_sb_base_bdev *sb_base_bdev;
2462 : struct raid_base_bdev_info *base_info;
2463 : uint8_t i;
2464 :
2465 0 : for (i = 0; i < sb->base_bdevs_size; i++) {
2466 0 : sb_base_bdev = &sb->base_bdevs[i];
2467 :
2468 0 : if (sb_base_bdev->state != RAID_SB_BASE_BDEV_CONFIGURED &&
2469 0 : sb_base_bdev->slot < raid_bdev->num_base_bdevs) {
2470 0 : base_info = &raid_bdev->base_bdev_info[sb_base_bdev->slot];
2471 0 : if (base_info->is_configured) {
2472 0 : sb_base_bdev->state = RAID_SB_BASE_BDEV_CONFIGURED;
2473 0 : sb_base_bdev->data_offset = base_info->data_offset;
2474 0 : spdk_uuid_copy(&sb_base_bdev->uuid, &base_info->uuid);
2475 : }
2476 : }
2477 : }
2478 :
2479 0 : raid_bdev_write_superblock(raid_bdev, raid_bdev_process_finish_write_sb_cb, NULL);
2480 0 : }
2481 :
2482 : static void raid_bdev_process_free(struct raid_bdev_process *process);
2483 :
2484 : static void
2485 2 : _raid_bdev_process_finish_done(void *ctx)
2486 : {
2487 2 : struct raid_bdev_process *process = ctx;
2488 : struct raid_process_finish_action *finish_action;
2489 :
2490 2 : while ((finish_action = TAILQ_FIRST(&process->finish_actions)) != NULL) {
2491 0 : TAILQ_REMOVE(&process->finish_actions, finish_action, link);
2492 0 : finish_action->cb(finish_action->cb_ctx);
2493 0 : free(finish_action);
2494 : }
2495 :
2496 2 : spdk_poller_unregister(&process->qos.process_continue_poller);
2497 :
2498 2 : raid_bdev_process_free(process);
2499 :
2500 2 : spdk_thread_exit(spdk_get_thread());
2501 2 : }
2502 :
2503 : static void
2504 0 : raid_bdev_process_finish_target_removed(void *ctx, int status)
2505 : {
2506 0 : struct raid_bdev_process *process = ctx;
2507 :
2508 0 : if (status != 0) {
2509 0 : SPDK_ERRLOG("Failed to remove target bdev: %s\n", spdk_strerror(-status));
2510 : }
2511 :
2512 0 : spdk_thread_send_msg(process->thread, _raid_bdev_process_finish_done, process);
2513 0 : }
2514 :
2515 : static void
2516 2 : raid_bdev_process_finish_unquiesced(void *ctx, int status)
2517 : {
2518 2 : struct raid_bdev_process *process = ctx;
2519 :
2520 2 : if (status != 0) {
2521 0 : SPDK_ERRLOG("Failed to unquiesce bdev: %s\n", spdk_strerror(-status));
2522 : }
2523 :
2524 2 : if (process->status != 0) {
2525 0 : status = _raid_bdev_remove_base_bdev(process->target, raid_bdev_process_finish_target_removed,
2526 : process);
2527 0 : if (status != 0) {
2528 0 : raid_bdev_process_finish_target_removed(process, status);
2529 : }
2530 0 : return;
2531 : }
2532 :
2533 2 : spdk_thread_send_msg(process->thread, _raid_bdev_process_finish_done, process);
2534 : }
2535 :
2536 : static void
2537 2 : raid_bdev_process_finish_unquiesce(void *ctx)
2538 : {
2539 2 : struct raid_bdev_process *process = ctx;
2540 : int rc;
2541 :
2542 2 : rc = spdk_bdev_unquiesce(&process->raid_bdev->bdev, &g_raid_if,
2543 : raid_bdev_process_finish_unquiesced, process);
2544 2 : if (rc != 0) {
2545 0 : raid_bdev_process_finish_unquiesced(process, rc);
2546 : }
2547 2 : }
2548 :
2549 : static void
2550 2 : raid_bdev_process_finish_done(void *ctx)
2551 : {
2552 2 : struct raid_bdev_process *process = ctx;
2553 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2554 :
2555 2 : if (process->raid_ch != NULL) {
2556 2 : spdk_put_io_channel(spdk_io_channel_from_ctx(process->raid_ch));
2557 : }
2558 :
2559 2 : process->state = RAID_PROCESS_STATE_STOPPED;
2560 :
2561 2 : if (process->status == 0) {
2562 2 : SPDK_NOTICELOG("Finished %s on raid bdev %s\n",
2563 : raid_bdev_process_to_str(process->type),
2564 : raid_bdev->bdev.name);
2565 2 : if (raid_bdev->superblock_enabled) {
2566 0 : spdk_thread_send_msg(spdk_thread_get_app_thread(),
2567 : raid_bdev_process_finish_write_sb,
2568 : raid_bdev);
2569 : }
2570 : } else {
2571 0 : SPDK_WARNLOG("Finished %s on raid bdev %s: %s\n",
2572 : raid_bdev_process_to_str(process->type),
2573 : raid_bdev->bdev.name,
2574 : spdk_strerror(-process->status));
2575 : }
2576 :
2577 2 : spdk_thread_send_msg(spdk_thread_get_app_thread(), raid_bdev_process_finish_unquiesce,
2578 : process);
2579 2 : }
2580 :
2581 : static void
2582 2 : __raid_bdev_process_finish(struct spdk_io_channel_iter *i, int status)
2583 : {
2584 2 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2585 :
2586 2 : spdk_thread_send_msg(process->thread, raid_bdev_process_finish_done, process);
2587 2 : }
2588 :
2589 : static void
2590 2 : raid_bdev_channel_process_finish(struct spdk_io_channel_iter *i)
2591 : {
2592 2 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2593 2 : struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
2594 2 : struct raid_bdev_io_channel *raid_ch = spdk_io_channel_get_ctx(ch);
2595 :
2596 2 : if (process->status == 0) {
2597 2 : uint8_t slot = raid_bdev_base_bdev_slot(process->target);
2598 :
2599 2 : raid_ch->base_channel[slot] = raid_ch->process.target_ch;
2600 2 : raid_ch->process.target_ch = NULL;
2601 : }
2602 :
2603 2 : raid_bdev_ch_process_cleanup(raid_ch);
2604 :
2605 2 : spdk_for_each_channel_continue(i, 0);
2606 2 : }
2607 :
2608 : static void
2609 2 : raid_bdev_process_finish_quiesced(void *ctx, int status)
2610 : {
2611 2 : struct raid_bdev_process *process = ctx;
2612 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2613 :
2614 2 : if (status != 0) {
2615 0 : SPDK_ERRLOG("Failed to quiesce bdev: %s\n", spdk_strerror(-status));
2616 0 : return;
2617 : }
2618 :
2619 2 : raid_bdev->process = NULL;
2620 2 : process->target->is_process_target = false;
2621 :
2622 2 : spdk_for_each_channel(process->raid_bdev, raid_bdev_channel_process_finish, process,
2623 : __raid_bdev_process_finish);
2624 : }
2625 :
2626 : static void
2627 2 : _raid_bdev_process_finish(void *ctx)
2628 : {
2629 2 : struct raid_bdev_process *process = ctx;
2630 : int rc;
2631 :
2632 2 : rc = spdk_bdev_quiesce(&process->raid_bdev->bdev, &g_raid_if,
2633 : raid_bdev_process_finish_quiesced, process);
2634 2 : if (rc != 0) {
2635 0 : raid_bdev_process_finish_quiesced(ctx, rc);
2636 : }
2637 2 : }
2638 :
2639 : static void
2640 2 : raid_bdev_process_do_finish(struct raid_bdev_process *process)
2641 : {
2642 2 : spdk_thread_send_msg(spdk_thread_get_app_thread(), _raid_bdev_process_finish, process);
2643 2 : }
2644 :
2645 : static void raid_bdev_process_unlock_window_range(struct raid_bdev_process *process);
2646 : static void raid_bdev_process_thread_run(struct raid_bdev_process *process);
2647 :
2648 : static void
2649 2 : raid_bdev_process_finish(struct raid_bdev_process *process, int status)
2650 : {
2651 2 : assert(spdk_get_thread() == process->thread);
2652 :
2653 2 : if (process->status == 0) {
2654 2 : process->status = status;
2655 : }
2656 :
2657 2 : if (process->state >= RAID_PROCESS_STATE_STOPPING) {
2658 0 : return;
2659 : }
2660 :
2661 2 : assert(process->state == RAID_PROCESS_STATE_RUNNING);
2662 2 : process->state = RAID_PROCESS_STATE_STOPPING;
2663 :
2664 2 : if (process->window_range_locked) {
2665 0 : raid_bdev_process_unlock_window_range(process);
2666 : } else {
2667 2 : raid_bdev_process_thread_run(process);
2668 : }
2669 : }
2670 :
2671 : static void
2672 2 : raid_bdev_process_window_range_unlocked(void *ctx, int status)
2673 : {
2674 2 : struct raid_bdev_process *process = ctx;
2675 :
2676 2 : if (status != 0) {
2677 0 : SPDK_ERRLOG("Failed to unlock LBA range: %s\n", spdk_strerror(-status));
2678 0 : raid_bdev_process_finish(process, status);
2679 0 : return;
2680 : }
2681 :
2682 2 : process->window_range_locked = false;
2683 2 : process->window_offset += process->window_size;
2684 :
2685 2 : raid_bdev_process_thread_run(process);
2686 : }
2687 :
2688 : static void
2689 2 : raid_bdev_process_unlock_window_range(struct raid_bdev_process *process)
2690 : {
2691 : int rc;
2692 :
2693 2 : assert(process->window_range_locked == true);
2694 :
2695 2 : rc = spdk_bdev_unquiesce_range(&process->raid_bdev->bdev, &g_raid_if,
2696 : process->window_offset, process->max_window_size,
2697 : raid_bdev_process_window_range_unlocked, process);
2698 2 : if (rc != 0) {
2699 0 : raid_bdev_process_window_range_unlocked(process, rc);
2700 : }
2701 2 : }
2702 :
2703 : static void
2704 2 : raid_bdev_process_channels_update_done(struct spdk_io_channel_iter *i, int status)
2705 : {
2706 2 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2707 :
2708 2 : raid_bdev_process_unlock_window_range(process);
2709 2 : }
2710 :
2711 : static void
2712 2 : raid_bdev_process_channel_update(struct spdk_io_channel_iter *i)
2713 : {
2714 2 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2715 2 : struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
2716 2 : struct raid_bdev_io_channel *raid_ch = spdk_io_channel_get_ctx(ch);
2717 :
2718 2 : raid_ch->process.offset = process->window_offset + process->window_size;
2719 :
2720 2 : spdk_for_each_channel_continue(i, 0);
2721 2 : }
2722 :
2723 : void
2724 2 : raid_bdev_process_request_complete(struct raid_bdev_process_request *process_req, int status)
2725 : {
2726 2 : struct raid_bdev_process *process = process_req->process;
2727 :
2728 2 : TAILQ_INSERT_TAIL(&process->requests, process_req, link);
2729 :
2730 2 : assert(spdk_get_thread() == process->thread);
2731 2 : assert(process->window_remaining >= process_req->num_blocks);
2732 :
2733 2 : if (status != 0) {
2734 0 : process->window_status = status;
2735 : }
2736 :
2737 2 : process->window_remaining -= process_req->num_blocks;
2738 2 : if (process->window_remaining == 0) {
2739 2 : if (process->window_status != 0) {
2740 0 : raid_bdev_process_finish(process, process->window_status);
2741 0 : return;
2742 : }
2743 :
2744 2 : spdk_for_each_channel(process->raid_bdev, raid_bdev_process_channel_update, process,
2745 : raid_bdev_process_channels_update_done);
2746 : }
2747 : }
2748 :
2749 : static int
2750 2 : raid_bdev_submit_process_request(struct raid_bdev_process *process, uint64_t offset_blocks,
2751 : uint32_t num_blocks)
2752 : {
2753 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2754 : struct raid_bdev_process_request *process_req;
2755 : int ret;
2756 :
2757 2 : process_req = TAILQ_FIRST(&process->requests);
2758 2 : if (process_req == NULL) {
2759 0 : assert(process->window_remaining > 0);
2760 0 : return 0;
2761 : }
2762 :
2763 2 : process_req->target = process->target;
2764 2 : process_req->target_ch = process->raid_ch->process.target_ch;
2765 2 : process_req->offset_blocks = offset_blocks;
2766 2 : process_req->num_blocks = num_blocks;
2767 2 : process_req->iov.iov_len = num_blocks * raid_bdev->bdev.blocklen;
2768 :
2769 2 : ret = raid_bdev->module->submit_process_request(process_req, process->raid_ch);
2770 2 : if (ret <= 0) {
2771 0 : if (ret < 0) {
2772 0 : SPDK_ERRLOG("Failed to submit process request on %s: %s\n",
2773 : raid_bdev->bdev.name, spdk_strerror(-ret));
2774 0 : process->window_status = ret;
2775 : }
2776 0 : return ret;
2777 : }
2778 :
2779 2 : process_req->num_blocks = ret;
2780 2 : TAILQ_REMOVE(&process->requests, process_req, link);
2781 :
2782 2 : return ret;
2783 : }
2784 :
2785 : static void
2786 2 : _raid_bdev_process_thread_run(struct raid_bdev_process *process)
2787 : {
2788 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2789 2 : uint64_t offset = process->window_offset;
2790 2 : const uint64_t offset_end = spdk_min(offset + process->max_window_size, raid_bdev->bdev.blockcnt);
2791 : int ret;
2792 :
2793 4 : while (offset < offset_end) {
2794 2 : ret = raid_bdev_submit_process_request(process, offset, offset_end - offset);
2795 2 : if (ret <= 0) {
2796 0 : break;
2797 : }
2798 :
2799 2 : process->window_remaining += ret;
2800 2 : offset += ret;
2801 : }
2802 :
2803 2 : if (process->window_remaining > 0) {
2804 2 : process->window_size = process->window_remaining;
2805 : } else {
2806 0 : raid_bdev_process_finish(process, process->window_status);
2807 : }
2808 2 : }
2809 :
2810 : static void
2811 2 : raid_bdev_process_window_range_locked(void *ctx, int status)
2812 : {
2813 2 : struct raid_bdev_process *process = ctx;
2814 :
2815 2 : if (status != 0) {
2816 0 : SPDK_ERRLOG("Failed to lock LBA range: %s\n", spdk_strerror(-status));
2817 0 : raid_bdev_process_finish(process, status);
2818 0 : return;
2819 : }
2820 :
2821 2 : process->window_range_locked = true;
2822 :
2823 2 : if (process->state == RAID_PROCESS_STATE_STOPPING) {
2824 0 : raid_bdev_process_unlock_window_range(process);
2825 0 : return;
2826 : }
2827 :
2828 2 : _raid_bdev_process_thread_run(process);
2829 : }
2830 :
2831 : static bool
2832 12 : raid_bdev_process_consume_token(struct raid_bdev_process *process)
2833 : {
2834 12 : struct raid_bdev *raid_bdev = process->raid_bdev;
2835 12 : uint64_t now = spdk_get_ticks();
2836 :
2837 12 : process->qos.bytes_available = spdk_min(process->qos.bytes_max,
2838 : process->qos.bytes_available +
2839 : (now - process->qos.last_tsc) * process->qos.bytes_per_tsc);
2840 12 : process->qos.last_tsc = now;
2841 12 : if (process->qos.bytes_available > 0.0) {
2842 1 : process->qos.bytes_available -= process->window_size * raid_bdev->bdev.blocklen;
2843 1 : return true;
2844 : }
2845 11 : return false;
2846 : }
2847 :
2848 : static bool
2849 13 : raid_bdev_process_lock_window_range(struct raid_bdev_process *process)
2850 : {
2851 13 : struct raid_bdev *raid_bdev = process->raid_bdev;
2852 : int rc;
2853 :
2854 13 : assert(process->window_range_locked == false);
2855 :
2856 13 : if (process->qos.enable_qos) {
2857 12 : if (raid_bdev_process_consume_token(process)) {
2858 1 : spdk_poller_pause(process->qos.process_continue_poller);
2859 : } else {
2860 11 : spdk_poller_resume(process->qos.process_continue_poller);
2861 11 : return false;
2862 : }
2863 : }
2864 :
2865 2 : rc = spdk_bdev_quiesce_range(&raid_bdev->bdev, &g_raid_if,
2866 : process->window_offset, process->max_window_size,
2867 : raid_bdev_process_window_range_locked, process);
2868 2 : if (rc != 0) {
2869 0 : raid_bdev_process_window_range_locked(process, rc);
2870 : }
2871 2 : return true;
2872 : }
2873 :
2874 : static int
2875 11 : raid_bdev_process_continue_poll(void *arg)
2876 : {
2877 11 : struct raid_bdev_process *process = arg;
2878 :
2879 11 : if (raid_bdev_process_lock_window_range(process)) {
2880 1 : return SPDK_POLLER_BUSY;
2881 : }
2882 10 : return SPDK_POLLER_IDLE;
2883 : }
2884 :
2885 : static void
2886 6 : raid_bdev_process_thread_run(struct raid_bdev_process *process)
2887 : {
2888 6 : struct raid_bdev *raid_bdev = process->raid_bdev;
2889 :
2890 6 : assert(spdk_get_thread() == process->thread);
2891 6 : assert(process->window_remaining == 0);
2892 6 : assert(process->window_range_locked == false);
2893 :
2894 6 : if (process->state == RAID_PROCESS_STATE_STOPPING) {
2895 2 : raid_bdev_process_do_finish(process);
2896 2 : return;
2897 : }
2898 :
2899 4 : if (process->window_offset == raid_bdev->bdev.blockcnt) {
2900 2 : SPDK_DEBUGLOG(bdev_raid, "process completed on %s\n", raid_bdev->bdev.name);
2901 2 : raid_bdev_process_finish(process, 0);
2902 2 : return;
2903 : }
2904 :
2905 2 : process->max_window_size = spdk_min(raid_bdev->bdev.blockcnt - process->window_offset,
2906 : process->max_window_size);
2907 2 : raid_bdev_process_lock_window_range(process);
2908 : }
2909 :
2910 : static void
2911 2 : raid_bdev_process_thread_init(void *ctx)
2912 : {
2913 2 : struct raid_bdev_process *process = ctx;
2914 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2915 : struct spdk_io_channel *ch;
2916 :
2917 2 : process->thread = spdk_get_thread();
2918 :
2919 2 : ch = spdk_get_io_channel(raid_bdev);
2920 2 : if (ch == NULL) {
2921 0 : process->status = -ENOMEM;
2922 0 : raid_bdev_process_do_finish(process);
2923 0 : return;
2924 : }
2925 :
2926 2 : process->raid_ch = spdk_io_channel_get_ctx(ch);
2927 2 : process->state = RAID_PROCESS_STATE_RUNNING;
2928 :
2929 2 : if (process->qos.enable_qos) {
2930 1 : process->qos.process_continue_poller = SPDK_POLLER_REGISTER(raid_bdev_process_continue_poll,
2931 : process, 0);
2932 1 : spdk_poller_pause(process->qos.process_continue_poller);
2933 : }
2934 :
2935 2 : SPDK_NOTICELOG("Started %s on raid bdev %s\n",
2936 : raid_bdev_process_to_str(process->type), raid_bdev->bdev.name);
2937 :
2938 2 : raid_bdev_process_thread_run(process);
2939 : }
2940 :
2941 : static void
2942 0 : raid_bdev_channels_abort_start_process_done(struct spdk_io_channel_iter *i, int status)
2943 : {
2944 0 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2945 :
2946 0 : _raid_bdev_remove_base_bdev(process->target, NULL, NULL);
2947 0 : raid_bdev_process_free(process);
2948 :
2949 : /* TODO: update sb */
2950 0 : }
2951 :
2952 : static void
2953 0 : raid_bdev_channel_abort_start_process(struct spdk_io_channel_iter *i)
2954 : {
2955 0 : struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
2956 0 : struct raid_bdev_io_channel *raid_ch = spdk_io_channel_get_ctx(ch);
2957 :
2958 0 : raid_bdev_ch_process_cleanup(raid_ch);
2959 :
2960 0 : spdk_for_each_channel_continue(i, 0);
2961 0 : }
2962 :
2963 : static void
2964 2 : raid_bdev_channels_start_process_done(struct spdk_io_channel_iter *i, int status)
2965 : {
2966 2 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
2967 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
2968 : struct spdk_thread *thread;
2969 2 : char thread_name[RAID_BDEV_SB_NAME_SIZE + 16];
2970 :
2971 2 : if (status == 0 &&
2972 2 : (process->target->remove_scheduled || !process->target->is_configured ||
2973 2 : raid_bdev->num_base_bdevs_operational <= raid_bdev->min_base_bdevs_operational)) {
2974 : /* a base bdev was removed before we got here */
2975 0 : status = -ENODEV;
2976 : }
2977 :
2978 2 : if (status != 0) {
2979 0 : SPDK_ERRLOG("Failed to start %s on %s: %s\n",
2980 : raid_bdev_process_to_str(process->type), raid_bdev->bdev.name,
2981 : spdk_strerror(-status));
2982 0 : goto err;
2983 : }
2984 :
2985 2 : snprintf(thread_name, sizeof(thread_name), "%s_%s",
2986 : raid_bdev->bdev.name, raid_bdev_process_to_str(process->type));
2987 :
2988 2 : thread = spdk_thread_create(thread_name, NULL);
2989 2 : if (thread == NULL) {
2990 0 : SPDK_ERRLOG("Failed to create %s thread for %s\n",
2991 : raid_bdev_process_to_str(process->type), raid_bdev->bdev.name);
2992 0 : goto err;
2993 : }
2994 :
2995 2 : raid_bdev->process = process;
2996 :
2997 2 : spdk_thread_send_msg(thread, raid_bdev_process_thread_init, process);
2998 :
2999 2 : return;
3000 0 : err:
3001 0 : spdk_for_each_channel(process->raid_bdev, raid_bdev_channel_abort_start_process, process,
3002 : raid_bdev_channels_abort_start_process_done);
3003 : }
3004 :
3005 : static void
3006 0 : raid_bdev_channel_start_process(struct spdk_io_channel_iter *i)
3007 : {
3008 0 : struct raid_bdev_process *process = spdk_io_channel_iter_get_ctx(i);
3009 0 : struct spdk_io_channel *ch = spdk_io_channel_iter_get_channel(i);
3010 0 : struct raid_bdev_io_channel *raid_ch = spdk_io_channel_get_ctx(ch);
3011 : int rc;
3012 :
3013 0 : rc = raid_bdev_ch_process_setup(raid_ch, process);
3014 :
3015 0 : spdk_for_each_channel_continue(i, rc);
3016 0 : }
3017 :
3018 : static void
3019 2 : raid_bdev_process_start(struct raid_bdev_process *process)
3020 : {
3021 2 : struct raid_bdev *raid_bdev = process->raid_bdev;
3022 :
3023 2 : assert(raid_bdev->module->submit_process_request != NULL);
3024 :
3025 2 : spdk_for_each_channel(raid_bdev, raid_bdev_channel_start_process, process,
3026 : raid_bdev_channels_start_process_done);
3027 2 : }
3028 :
3029 : static void
3030 32 : raid_bdev_process_request_free(struct raid_bdev_process_request *process_req)
3031 : {
3032 32 : spdk_dma_free(process_req->iov.iov_base);
3033 32 : spdk_dma_free(process_req->md_buf);
3034 32 : free(process_req);
3035 32 : }
3036 :
3037 : static struct raid_bdev_process_request *
3038 32 : raid_bdev_process_alloc_request(struct raid_bdev_process *process)
3039 : {
3040 32 : struct raid_bdev *raid_bdev = process->raid_bdev;
3041 : struct raid_bdev_process_request *process_req;
3042 :
3043 32 : process_req = calloc(1, sizeof(*process_req));
3044 32 : if (process_req == NULL) {
3045 0 : return NULL;
3046 : }
3047 :
3048 32 : process_req->process = process;
3049 32 : process_req->iov.iov_len = process->max_window_size * raid_bdev->bdev.blocklen;
3050 32 : process_req->iov.iov_base = spdk_dma_malloc(process_req->iov.iov_len, 4096, 0);
3051 32 : if (process_req->iov.iov_base == NULL) {
3052 0 : free(process_req);
3053 0 : return NULL;
3054 : }
3055 32 : if (spdk_bdev_is_md_separate(&raid_bdev->bdev)) {
3056 32 : process_req->md_buf = spdk_dma_malloc(process->max_window_size * raid_bdev->bdev.md_len, 4096, 0);
3057 32 : if (process_req->md_buf == NULL) {
3058 0 : raid_bdev_process_request_free(process_req);
3059 0 : return NULL;
3060 : }
3061 : }
3062 :
3063 32 : return process_req;
3064 : }
3065 :
3066 : static void
3067 2 : raid_bdev_process_free(struct raid_bdev_process *process)
3068 : {
3069 : struct raid_bdev_process_request *process_req;
3070 :
3071 34 : while ((process_req = TAILQ_FIRST(&process->requests)) != NULL) {
3072 32 : TAILQ_REMOVE(&process->requests, process_req, link);
3073 32 : raid_bdev_process_request_free(process_req);
3074 : }
3075 :
3076 2 : free(process);
3077 2 : }
3078 :
3079 : static struct raid_bdev_process *
3080 2 : raid_bdev_process_alloc(struct raid_bdev *raid_bdev, enum raid_process_type type,
3081 : struct raid_base_bdev_info *target)
3082 : {
3083 : struct raid_bdev_process *process;
3084 : struct raid_bdev_process_request *process_req;
3085 : int i;
3086 :
3087 2 : process = calloc(1, sizeof(*process));
3088 2 : if (process == NULL) {
3089 0 : return NULL;
3090 : }
3091 :
3092 2 : process->raid_bdev = raid_bdev;
3093 2 : process->type = type;
3094 2 : process->target = target;
3095 2 : process->max_window_size = spdk_max(spdk_divide_round_up(g_opts.process_window_size_kb * 1024UL,
3096 : spdk_bdev_get_data_block_size(&raid_bdev->bdev)),
3097 : raid_bdev->bdev.write_unit_size);
3098 2 : TAILQ_INIT(&process->requests);
3099 2 : TAILQ_INIT(&process->finish_actions);
3100 :
3101 2 : if (g_opts.process_max_bandwidth_mb_sec != 0) {
3102 1 : process->qos.enable_qos = true;
3103 1 : process->qos.last_tsc = spdk_get_ticks();
3104 1 : process->qos.bytes_per_tsc = g_opts.process_max_bandwidth_mb_sec * 1024 * 1024.0 /
3105 1 : spdk_get_ticks_hz();
3106 1 : process->qos.bytes_max = g_opts.process_max_bandwidth_mb_sec * 1024 * 1024.0 / SPDK_SEC_TO_MSEC;
3107 1 : process->qos.bytes_available = 0.0;
3108 : }
3109 :
3110 34 : for (i = 0; i < RAID_BDEV_PROCESS_MAX_QD; i++) {
3111 32 : process_req = raid_bdev_process_alloc_request(process);
3112 32 : if (process_req == NULL) {
3113 0 : raid_bdev_process_free(process);
3114 0 : return NULL;
3115 : }
3116 :
3117 32 : TAILQ_INSERT_TAIL(&process->requests, process_req, link);
3118 : }
3119 :
3120 2 : return process;
3121 : }
3122 :
3123 : static int
3124 2 : raid_bdev_start_rebuild(struct raid_base_bdev_info *target)
3125 : {
3126 : struct raid_bdev_process *process;
3127 :
3128 2 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
3129 :
3130 2 : process = raid_bdev_process_alloc(target->raid_bdev, RAID_PROCESS_REBUILD, target);
3131 2 : if (process == NULL) {
3132 0 : return -ENOMEM;
3133 : }
3134 :
3135 2 : raid_bdev_process_start(process);
3136 :
3137 2 : return 0;
3138 : }
3139 :
3140 : static void raid_bdev_configure_base_bdev_cont(struct raid_base_bdev_info *base_info);
3141 :
3142 : static void
3143 0 : _raid_bdev_configure_base_bdev_cont(struct spdk_io_channel_iter *i, int status)
3144 : {
3145 0 : struct raid_base_bdev_info *base_info = spdk_io_channel_iter_get_ctx(i);
3146 :
3147 0 : raid_bdev_configure_base_bdev_cont(base_info);
3148 0 : }
3149 :
3150 : static void
3151 0 : raid_bdev_ch_sync(struct spdk_io_channel_iter *i)
3152 : {
3153 0 : spdk_for_each_channel_continue(i, 0);
3154 0 : }
3155 :
3156 : static void
3157 510 : raid_bdev_configure_base_bdev_cont(struct raid_base_bdev_info *base_info)
3158 : {
3159 510 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
3160 : raid_base_bdev_cb configure_cb;
3161 : int rc;
3162 :
3163 510 : if (raid_bdev->num_base_bdevs_discovered == raid_bdev->num_base_bdevs_operational &&
3164 0 : base_info->is_process_target == false) {
3165 : /* TODO: defer if rebuild in progress on another base bdev */
3166 0 : assert(raid_bdev->process == NULL);
3167 0 : assert(raid_bdev->state == RAID_BDEV_STATE_ONLINE);
3168 0 : base_info->is_process_target = true;
3169 : /* To assure is_process_target is set before is_configured when checked in raid_bdev_create_cb() */
3170 0 : spdk_for_each_channel(raid_bdev, raid_bdev_ch_sync, base_info, _raid_bdev_configure_base_bdev_cont);
3171 0 : return;
3172 : }
3173 :
3174 510 : base_info->is_configured = true;
3175 :
3176 510 : raid_bdev->num_base_bdevs_discovered++;
3177 510 : assert(raid_bdev->num_base_bdevs_discovered <= raid_bdev->num_base_bdevs);
3178 510 : assert(raid_bdev->num_base_bdevs_operational <= raid_bdev->num_base_bdevs);
3179 510 : assert(raid_bdev->num_base_bdevs_operational >= raid_bdev->min_base_bdevs_operational);
3180 :
3181 510 : configure_cb = base_info->configure_cb;
3182 510 : base_info->configure_cb = NULL;
3183 : /*
3184 : * Configure the raid bdev when the number of discovered base bdevs reaches the number
3185 : * of base bdevs we know to be operational members of the array. Usually this is equal
3186 : * to the total number of base bdevs (num_base_bdevs) but can be less - when the array is
3187 : * degraded.
3188 : */
3189 510 : if (raid_bdev->num_base_bdevs_discovered == raid_bdev->num_base_bdevs_operational) {
3190 14 : rc = raid_bdev_configure(raid_bdev, configure_cb, base_info->configure_cb_ctx);
3191 14 : if (rc != 0) {
3192 0 : SPDK_ERRLOG("Failed to configure raid bdev: %s\n", spdk_strerror(-rc));
3193 : } else {
3194 14 : configure_cb = NULL;
3195 : }
3196 496 : } else if (base_info->is_process_target) {
3197 0 : raid_bdev->num_base_bdevs_operational++;
3198 0 : rc = raid_bdev_start_rebuild(base_info);
3199 0 : if (rc != 0) {
3200 0 : SPDK_ERRLOG("Failed to start rebuild: %s\n", spdk_strerror(-rc));
3201 0 : _raid_bdev_remove_base_bdev(base_info, NULL, NULL);
3202 : }
3203 : } else {
3204 496 : rc = 0;
3205 : }
3206 :
3207 510 : if (configure_cb != NULL) {
3208 496 : configure_cb(base_info->configure_cb_ctx, rc);
3209 : }
3210 : }
3211 :
3212 : static void raid_bdev_examine_sb(const struct raid_bdev_superblock *sb, struct spdk_bdev *bdev,
3213 : raid_base_bdev_cb cb_fn, void *cb_ctx);
3214 :
3215 : static void
3216 510 : raid_bdev_configure_base_bdev_check_sb_cb(const struct raid_bdev_superblock *sb, int status,
3217 : void *ctx)
3218 : {
3219 510 : struct raid_base_bdev_info *base_info = ctx;
3220 510 : raid_base_bdev_cb configure_cb = base_info->configure_cb;
3221 :
3222 510 : switch (status) {
3223 0 : case 0:
3224 : /* valid superblock found */
3225 0 : base_info->configure_cb = NULL;
3226 0 : if (spdk_uuid_compare(&base_info->raid_bdev->bdev.uuid, &sb->uuid) == 0) {
3227 0 : struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(base_info->desc);
3228 :
3229 0 : raid_bdev_free_base_bdev_resource(base_info);
3230 0 : raid_bdev_examine_sb(sb, bdev, configure_cb, base_info->configure_cb_ctx);
3231 0 : return;
3232 : }
3233 0 : SPDK_ERRLOG("Superblock of a different raid bdev found on bdev %s\n", base_info->name);
3234 0 : status = -EEXIST;
3235 0 : raid_bdev_free_base_bdev_resource(base_info);
3236 0 : break;
3237 510 : case -EINVAL:
3238 : /* no valid superblock */
3239 510 : raid_bdev_configure_base_bdev_cont(base_info);
3240 510 : return;
3241 0 : default:
3242 0 : SPDK_ERRLOG("Failed to examine bdev %s: %s\n",
3243 : base_info->name, spdk_strerror(-status));
3244 0 : break;
3245 : }
3246 :
3247 0 : if (configure_cb != NULL) {
3248 0 : base_info->configure_cb = NULL;
3249 0 : configure_cb(base_info->configure_cb_ctx, status);
3250 : }
3251 : }
3252 :
3253 : static int
3254 513 : raid_bdev_configure_base_bdev(struct raid_base_bdev_info *base_info, bool existing,
3255 : raid_base_bdev_cb cb_fn, void *cb_ctx)
3256 : {
3257 513 : struct raid_bdev *raid_bdev = base_info->raid_bdev;
3258 513 : struct spdk_bdev_desc *desc;
3259 : struct spdk_bdev *bdev;
3260 : const struct spdk_uuid *bdev_uuid;
3261 : int rc;
3262 :
3263 513 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
3264 513 : assert(base_info->desc == NULL);
3265 :
3266 : /*
3267 : * Base bdev can be added by name or uuid. Here we assure both properties are set and valid
3268 : * before claiming the bdev.
3269 : */
3270 :
3271 513 : if (!spdk_uuid_is_null(&base_info->uuid)) {
3272 0 : char uuid_str[SPDK_UUID_STRING_LEN];
3273 : const char *bdev_name;
3274 :
3275 0 : spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &base_info->uuid);
3276 :
3277 : /* UUID of a bdev is registered as its alias */
3278 0 : bdev = spdk_bdev_get_by_name(uuid_str);
3279 0 : if (bdev == NULL) {
3280 0 : return -ENODEV;
3281 : }
3282 :
3283 0 : bdev_name = spdk_bdev_get_name(bdev);
3284 :
3285 0 : if (base_info->name == NULL) {
3286 0 : assert(existing == true);
3287 0 : base_info->name = strdup(bdev_name);
3288 0 : if (base_info->name == NULL) {
3289 0 : return -ENOMEM;
3290 : }
3291 0 : } else if (strcmp(base_info->name, bdev_name) != 0) {
3292 0 : SPDK_ERRLOG("Name mismatch for base bdev '%s' - expected '%s'\n",
3293 : bdev_name, base_info->name);
3294 0 : return -EINVAL;
3295 : }
3296 : }
3297 :
3298 513 : assert(base_info->name != NULL);
3299 :
3300 513 : rc = spdk_bdev_open_ext(base_info->name, true, raid_bdev_event_base_bdev, NULL, &desc);
3301 513 : if (rc != 0) {
3302 1 : if (rc != -ENODEV) {
3303 0 : SPDK_ERRLOG("Unable to create desc on bdev '%s'\n", base_info->name);
3304 : }
3305 1 : return rc;
3306 : }
3307 :
3308 512 : bdev = spdk_bdev_desc_get_bdev(desc);
3309 512 : bdev_uuid = spdk_bdev_get_uuid(bdev);
3310 :
3311 512 : if (spdk_uuid_is_null(&base_info->uuid)) {
3312 512 : spdk_uuid_copy(&base_info->uuid, bdev_uuid);
3313 0 : } else if (spdk_uuid_compare(&base_info->uuid, bdev_uuid) != 0) {
3314 0 : SPDK_ERRLOG("UUID mismatch for base bdev '%s'\n", base_info->name);
3315 0 : spdk_bdev_close(desc);
3316 0 : return -EINVAL;
3317 : }
3318 :
3319 512 : rc = spdk_bdev_module_claim_bdev(bdev, NULL, &g_raid_if);
3320 512 : if (rc != 0) {
3321 2 : SPDK_ERRLOG("Unable to claim this bdev as it is already claimed\n");
3322 2 : spdk_bdev_close(desc);
3323 2 : return rc;
3324 : }
3325 :
3326 510 : SPDK_DEBUGLOG(bdev_raid, "bdev %s is claimed\n", bdev->name);
3327 :
3328 510 : base_info->app_thread_ch = spdk_bdev_get_io_channel(desc);
3329 510 : if (base_info->app_thread_ch == NULL) {
3330 0 : SPDK_ERRLOG("Failed to get io channel\n");
3331 0 : spdk_bdev_module_release_bdev(bdev);
3332 0 : spdk_bdev_close(desc);
3333 0 : return -ENOMEM;
3334 : }
3335 :
3336 510 : base_info->desc = desc;
3337 510 : base_info->blockcnt = bdev->blockcnt;
3338 :
3339 510 : if (raid_bdev->superblock_enabled) {
3340 : uint64_t data_offset;
3341 :
3342 32 : if (base_info->data_offset == 0) {
3343 32 : assert((RAID_BDEV_MIN_DATA_OFFSET_SIZE % spdk_bdev_get_data_block_size(bdev)) == 0);
3344 32 : data_offset = RAID_BDEV_MIN_DATA_OFFSET_SIZE / spdk_bdev_get_data_block_size(bdev);
3345 : } else {
3346 0 : data_offset = base_info->data_offset;
3347 : }
3348 :
3349 32 : if (bdev->optimal_io_boundary != 0) {
3350 0 : data_offset = spdk_divide_round_up(data_offset,
3351 0 : bdev->optimal_io_boundary) * bdev->optimal_io_boundary;
3352 0 : if (base_info->data_offset != 0 && base_info->data_offset != data_offset) {
3353 0 : SPDK_WARNLOG("Data offset %lu on bdev '%s' is different than optimal value %lu\n",
3354 : base_info->data_offset, base_info->name, data_offset);
3355 0 : data_offset = base_info->data_offset;
3356 : }
3357 : }
3358 :
3359 32 : base_info->data_offset = data_offset;
3360 : }
3361 :
3362 510 : if (base_info->data_offset >= bdev->blockcnt) {
3363 0 : SPDK_ERRLOG("Data offset %lu exceeds base bdev capacity %lu on bdev '%s'\n",
3364 : base_info->data_offset, bdev->blockcnt, base_info->name);
3365 0 : rc = -EINVAL;
3366 0 : goto out;
3367 : }
3368 :
3369 510 : if (base_info->data_size == 0) {
3370 510 : base_info->data_size = bdev->blockcnt - base_info->data_offset;
3371 0 : } else if (base_info->data_offset + base_info->data_size > bdev->blockcnt) {
3372 0 : SPDK_ERRLOG("Data offset and size exceeds base bdev capacity %lu on bdev '%s'\n",
3373 : bdev->blockcnt, base_info->name);
3374 0 : rc = -EINVAL;
3375 0 : goto out;
3376 : }
3377 :
3378 510 : if (!raid_bdev->module->dif_supported && spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
3379 0 : SPDK_ERRLOG("Base bdev '%s' has DIF or DIX enabled - unsupported RAID configuration\n",
3380 : bdev->name);
3381 0 : rc = -EINVAL;
3382 0 : goto out;
3383 : }
3384 :
3385 : /*
3386 : * Set the raid bdev properties if this is the first base bdev configured,
3387 : * otherwise - verify. Assumption is that all the base bdevs for any raid bdev should
3388 : * have the same blocklen and metadata format.
3389 : */
3390 510 : if (raid_bdev->bdev.blocklen == 0) {
3391 16 : raid_bdev->bdev.blocklen = bdev->blocklen;
3392 16 : raid_bdev->bdev.md_len = spdk_bdev_get_md_size(bdev);
3393 16 : raid_bdev->bdev.md_interleave = spdk_bdev_is_md_interleaved(bdev);
3394 16 : raid_bdev->bdev.dif_type = spdk_bdev_get_dif_type(bdev);
3395 16 : raid_bdev->bdev.dif_check_flags = bdev->dif_check_flags;
3396 16 : raid_bdev->bdev.dif_is_head_of_md = spdk_bdev_is_dif_head_of_md(bdev);
3397 16 : raid_bdev->bdev.dif_pi_format = bdev->dif_pi_format;
3398 : } else {
3399 494 : if (raid_bdev->bdev.blocklen != bdev->blocklen) {
3400 0 : SPDK_ERRLOG("Raid bdev '%s' blocklen %u differs from base bdev '%s' blocklen %u\n",
3401 : raid_bdev->bdev.name, raid_bdev->bdev.blocklen, bdev->name, bdev->blocklen);
3402 0 : rc = -EINVAL;
3403 0 : goto out;
3404 : }
3405 :
3406 988 : if (raid_bdev->bdev.md_len != spdk_bdev_get_md_size(bdev) ||
3407 988 : raid_bdev->bdev.md_interleave != spdk_bdev_is_md_interleaved(bdev) ||
3408 494 : raid_bdev->bdev.dif_type != spdk_bdev_get_dif_type(bdev) ||
3409 988 : raid_bdev->bdev.dif_check_flags != bdev->dif_check_flags ||
3410 494 : raid_bdev->bdev.dif_is_head_of_md != spdk_bdev_is_dif_head_of_md(bdev) ||
3411 494 : raid_bdev->bdev.dif_pi_format != bdev->dif_pi_format) {
3412 0 : SPDK_ERRLOG("Raid bdev '%s' has different metadata format than base bdev '%s'\n",
3413 : raid_bdev->bdev.name, bdev->name);
3414 0 : rc = -EINVAL;
3415 0 : goto out;
3416 : }
3417 : }
3418 :
3419 510 : assert(base_info->configure_cb == NULL);
3420 510 : base_info->configure_cb = cb_fn;
3421 510 : base_info->configure_cb_ctx = cb_ctx;
3422 :
3423 510 : if (existing) {
3424 0 : raid_bdev_configure_base_bdev_cont(base_info);
3425 : } else {
3426 : /* check for existing superblock when using a new bdev */
3427 510 : rc = raid_bdev_load_base_bdev_superblock(desc, base_info->app_thread_ch,
3428 : raid_bdev_configure_base_bdev_check_sb_cb, base_info);
3429 510 : if (rc) {
3430 0 : SPDK_ERRLOG("Failed to read bdev %s superblock: %s\n",
3431 : bdev->name, spdk_strerror(-rc));
3432 : }
3433 : }
3434 510 : out:
3435 510 : if (rc != 0) {
3436 0 : base_info->configure_cb = NULL;
3437 0 : raid_bdev_free_base_bdev_resource(base_info);
3438 : }
3439 510 : return rc;
3440 : }
3441 :
3442 : int
3443 513 : raid_bdev_add_base_bdev(struct raid_bdev *raid_bdev, const char *name,
3444 : raid_base_bdev_cb cb_fn, void *cb_ctx)
3445 : {
3446 513 : struct raid_base_bdev_info *base_info = NULL, *iter;
3447 : int rc;
3448 :
3449 513 : assert(name != NULL);
3450 513 : assert(spdk_get_thread() == spdk_thread_get_app_thread());
3451 :
3452 513 : if (raid_bdev->process != NULL) {
3453 0 : SPDK_ERRLOG("raid bdev '%s' is in process\n",
3454 : raid_bdev->bdev.name);
3455 0 : return -EPERM;
3456 : }
3457 :
3458 513 : if (raid_bdev->state == RAID_BDEV_STATE_CONFIGURING) {
3459 513 : struct spdk_bdev *bdev = spdk_bdev_get_by_name(name);
3460 :
3461 513 : if (bdev != NULL) {
3462 16896 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, iter) {
3463 24863 : if (iter->name == NULL &&
3464 8479 : spdk_uuid_compare(&bdev->uuid, &iter->uuid) == 0) {
3465 0 : base_info = iter;
3466 0 : break;
3467 : }
3468 : }
3469 : }
3470 : }
3471 :
3472 513 : if (base_info == NULL || raid_bdev->state == RAID_BDEV_STATE_ONLINE) {
3473 8449 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, iter) {
3474 8449 : if (iter->name == NULL && spdk_uuid_is_null(&iter->uuid)) {
3475 513 : base_info = iter;
3476 513 : break;
3477 : }
3478 : }
3479 : }
3480 :
3481 513 : if (base_info == NULL) {
3482 0 : SPDK_ERRLOG("no empty slot found in raid bdev '%s' for new base bdev '%s'\n",
3483 : raid_bdev->bdev.name, name);
3484 0 : return -EINVAL;
3485 : }
3486 :
3487 513 : assert(base_info->is_configured == false);
3488 :
3489 513 : if (raid_bdev->state == RAID_BDEV_STATE_ONLINE) {
3490 0 : assert(base_info->data_size != 0);
3491 0 : assert(base_info->desc == NULL);
3492 : }
3493 :
3494 513 : base_info->name = strdup(name);
3495 513 : if (base_info->name == NULL) {
3496 0 : return -ENOMEM;
3497 : }
3498 :
3499 513 : rc = raid_bdev_configure_base_bdev(base_info, false, cb_fn, cb_ctx);
3500 513 : if (rc != 0 && (rc != -ENODEV || raid_bdev->state != RAID_BDEV_STATE_CONFIGURING)) {
3501 2 : SPDK_ERRLOG("base bdev '%s' configure failed: %s\n", name, spdk_strerror(-rc));
3502 2 : free(base_info->name);
3503 2 : base_info->name = NULL;
3504 : }
3505 :
3506 513 : return rc;
3507 : }
3508 :
3509 : static int
3510 0 : raid_bdev_create_from_sb(const struct raid_bdev_superblock *sb, struct raid_bdev **raid_bdev_out)
3511 : {
3512 0 : struct raid_bdev *raid_bdev;
3513 : uint8_t i;
3514 : int rc;
3515 :
3516 0 : rc = _raid_bdev_create(sb->name, (sb->strip_size * sb->block_size) / 1024, sb->num_base_bdevs,
3517 0 : sb->level, true, &sb->uuid, &raid_bdev);
3518 0 : if (rc != 0) {
3519 0 : return rc;
3520 : }
3521 :
3522 0 : rc = raid_bdev_alloc_superblock(raid_bdev, sb->block_size);
3523 0 : if (rc != 0) {
3524 0 : raid_bdev_free(raid_bdev);
3525 0 : return rc;
3526 : }
3527 :
3528 0 : assert(sb->length <= RAID_BDEV_SB_MAX_LENGTH);
3529 0 : memcpy(raid_bdev->sb, sb, sb->length);
3530 :
3531 0 : for (i = 0; i < sb->base_bdevs_size; i++) {
3532 0 : const struct raid_bdev_sb_base_bdev *sb_base_bdev = &sb->base_bdevs[i];
3533 0 : struct raid_base_bdev_info *base_info = &raid_bdev->base_bdev_info[sb_base_bdev->slot];
3534 :
3535 0 : if (sb_base_bdev->state == RAID_SB_BASE_BDEV_CONFIGURED) {
3536 0 : spdk_uuid_copy(&base_info->uuid, &sb_base_bdev->uuid);
3537 0 : raid_bdev->num_base_bdevs_operational++;
3538 : }
3539 :
3540 0 : base_info->data_offset = sb_base_bdev->data_offset;
3541 0 : base_info->data_size = sb_base_bdev->data_size;
3542 : }
3543 :
3544 0 : *raid_bdev_out = raid_bdev;
3545 0 : return 0;
3546 : }
3547 :
3548 : static void
3549 0 : raid_bdev_examine_no_sb(struct spdk_bdev *bdev)
3550 : {
3551 : struct raid_bdev *raid_bdev;
3552 : struct raid_base_bdev_info *base_info;
3553 :
3554 0 : TAILQ_FOREACH(raid_bdev, &g_raid_bdev_list, global_link) {
3555 0 : if (raid_bdev->state != RAID_BDEV_STATE_CONFIGURING || raid_bdev->sb != NULL) {
3556 0 : continue;
3557 : }
3558 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
3559 0 : if (base_info->desc == NULL &&
3560 0 : ((base_info->name != NULL && strcmp(bdev->name, base_info->name) == 0) ||
3561 0 : spdk_uuid_compare(&base_info->uuid, &bdev->uuid) == 0)) {
3562 0 : raid_bdev_configure_base_bdev(base_info, true, NULL, NULL);
3563 0 : break;
3564 : }
3565 : }
3566 : }
3567 0 : }
3568 :
3569 : struct raid_bdev_examine_others_ctx {
3570 : struct spdk_uuid raid_bdev_uuid;
3571 : uint8_t current_base_bdev_idx;
3572 : raid_base_bdev_cb cb_fn;
3573 : void *cb_ctx;
3574 : };
3575 :
3576 : static void
3577 0 : raid_bdev_examine_others_done(void *_ctx, int status)
3578 : {
3579 0 : struct raid_bdev_examine_others_ctx *ctx = _ctx;
3580 :
3581 0 : if (ctx->cb_fn != NULL) {
3582 0 : ctx->cb_fn(ctx->cb_ctx, status);
3583 : }
3584 0 : free(ctx);
3585 0 : }
3586 :
3587 : typedef void (*raid_bdev_examine_load_sb_cb)(struct spdk_bdev *bdev,
3588 : const struct raid_bdev_superblock *sb, int status, void *ctx);
3589 : static int raid_bdev_examine_load_sb(const char *bdev_name, raid_bdev_examine_load_sb_cb cb,
3590 : void *cb_ctx);
3591 : static void raid_bdev_examine_sb(const struct raid_bdev_superblock *sb, struct spdk_bdev *bdev,
3592 : raid_base_bdev_cb cb_fn, void *cb_ctx);
3593 : static void raid_bdev_examine_others(void *_ctx, int status);
3594 :
3595 : static void
3596 0 : raid_bdev_examine_others_load_cb(struct spdk_bdev *bdev, const struct raid_bdev_superblock *sb,
3597 : int status, void *_ctx)
3598 : {
3599 0 : struct raid_bdev_examine_others_ctx *ctx = _ctx;
3600 :
3601 0 : if (status != 0) {
3602 0 : raid_bdev_examine_others_done(ctx, status);
3603 0 : return;
3604 : }
3605 :
3606 0 : raid_bdev_examine_sb(sb, bdev, raid_bdev_examine_others, ctx);
3607 : }
3608 :
3609 : static void
3610 0 : raid_bdev_examine_others(void *_ctx, int status)
3611 : {
3612 0 : struct raid_bdev_examine_others_ctx *ctx = _ctx;
3613 : struct raid_bdev *raid_bdev;
3614 : struct raid_base_bdev_info *base_info;
3615 0 : char uuid_str[SPDK_UUID_STRING_LEN];
3616 :
3617 0 : if (status != 0 && status != -EEXIST) {
3618 0 : goto out;
3619 : }
3620 :
3621 0 : raid_bdev = raid_bdev_find_by_uuid(&ctx->raid_bdev_uuid);
3622 0 : if (raid_bdev == NULL) {
3623 0 : status = -ENODEV;
3624 0 : goto out;
3625 : }
3626 :
3627 0 : for (base_info = &raid_bdev->base_bdev_info[ctx->current_base_bdev_idx];
3628 0 : base_info < &raid_bdev->base_bdev_info[raid_bdev->num_base_bdevs];
3629 0 : base_info++) {
3630 0 : if (base_info->is_configured || spdk_uuid_is_null(&base_info->uuid)) {
3631 0 : continue;
3632 : }
3633 :
3634 0 : spdk_uuid_fmt_lower(uuid_str, sizeof(uuid_str), &base_info->uuid);
3635 :
3636 0 : if (spdk_bdev_get_by_name(uuid_str) == NULL) {
3637 0 : continue;
3638 : }
3639 :
3640 0 : ctx->current_base_bdev_idx = raid_bdev_base_bdev_slot(base_info);
3641 :
3642 0 : status = raid_bdev_examine_load_sb(uuid_str, raid_bdev_examine_others_load_cb, ctx);
3643 0 : if (status != 0) {
3644 0 : continue;
3645 : }
3646 0 : return;
3647 : }
3648 0 : out:
3649 0 : raid_bdev_examine_others_done(ctx, status);
3650 : }
3651 :
3652 : static void
3653 0 : raid_bdev_examine_sb(const struct raid_bdev_superblock *sb, struct spdk_bdev *bdev,
3654 : raid_base_bdev_cb cb_fn, void *cb_ctx)
3655 : {
3656 0 : const struct raid_bdev_sb_base_bdev *sb_base_bdev = NULL;
3657 0 : struct raid_bdev *raid_bdev;
3658 : struct raid_base_bdev_info *iter, *base_info;
3659 : uint8_t i;
3660 : int rc;
3661 :
3662 0 : if (sb->block_size != spdk_bdev_get_data_block_size(bdev)) {
3663 0 : SPDK_WARNLOG("Bdev %s block size (%u) does not match the value in superblock (%u)\n",
3664 : bdev->name, sb->block_size, spdk_bdev_get_data_block_size(bdev));
3665 0 : rc = -EINVAL;
3666 0 : goto out;
3667 : }
3668 :
3669 0 : if (spdk_uuid_is_null(&sb->uuid)) {
3670 0 : SPDK_WARNLOG("NULL raid bdev UUID in superblock on bdev %s\n", bdev->name);
3671 0 : rc = -EINVAL;
3672 0 : goto out;
3673 : }
3674 :
3675 0 : raid_bdev = raid_bdev_find_by_uuid(&sb->uuid);
3676 :
3677 0 : if (raid_bdev) {
3678 0 : if (raid_bdev->sb == NULL) {
3679 0 : SPDK_WARNLOG("raid superblock is null\n");
3680 0 : rc = -EINVAL;
3681 0 : goto out;
3682 : }
3683 :
3684 0 : if (sb->seq_number > raid_bdev->sb->seq_number) {
3685 0 : SPDK_DEBUGLOG(bdev_raid,
3686 : "raid superblock seq_number on bdev %s (%lu) greater than existing raid bdev %s (%lu)\n",
3687 : bdev->name, sb->seq_number, raid_bdev->bdev.name, raid_bdev->sb->seq_number);
3688 :
3689 0 : if (raid_bdev->state != RAID_BDEV_STATE_CONFIGURING) {
3690 0 : SPDK_WARNLOG("Newer version of raid bdev %s superblock found on bdev %s but raid bdev is not in configuring state.\n",
3691 : raid_bdev->bdev.name, bdev->name);
3692 0 : rc = -EBUSY;
3693 0 : goto out;
3694 : }
3695 :
3696 : /* remove and then recreate the raid bdev using the newer superblock */
3697 0 : raid_bdev_delete(raid_bdev, NULL, NULL);
3698 0 : raid_bdev = NULL;
3699 0 : } else if (sb->seq_number < raid_bdev->sb->seq_number) {
3700 0 : SPDK_DEBUGLOG(bdev_raid,
3701 : "raid superblock seq_number on bdev %s (%lu) smaller than existing raid bdev %s (%lu)\n",
3702 : bdev->name, sb->seq_number, raid_bdev->bdev.name, raid_bdev->sb->seq_number);
3703 : /* use the current raid bdev superblock */
3704 0 : sb = raid_bdev->sb;
3705 : }
3706 : }
3707 :
3708 0 : for (i = 0; i < sb->base_bdevs_size; i++) {
3709 0 : sb_base_bdev = &sb->base_bdevs[i];
3710 :
3711 0 : assert(spdk_uuid_is_null(&sb_base_bdev->uuid) == false);
3712 :
3713 0 : if (spdk_uuid_compare(&sb_base_bdev->uuid, spdk_bdev_get_uuid(bdev)) == 0) {
3714 0 : break;
3715 : }
3716 : }
3717 :
3718 0 : if (i == sb->base_bdevs_size) {
3719 0 : SPDK_DEBUGLOG(bdev_raid, "raid superblock does not contain this bdev's uuid\n");
3720 0 : rc = -EINVAL;
3721 0 : goto out;
3722 : }
3723 :
3724 0 : if (!raid_bdev) {
3725 : struct raid_bdev_examine_others_ctx *ctx;
3726 :
3727 0 : ctx = calloc(1, sizeof(*ctx));
3728 0 : if (ctx == NULL) {
3729 0 : rc = -ENOMEM;
3730 0 : goto out;
3731 : }
3732 :
3733 0 : rc = raid_bdev_create_from_sb(sb, &raid_bdev);
3734 0 : if (rc != 0) {
3735 0 : SPDK_ERRLOG("Failed to create raid bdev %s: %s\n",
3736 : sb->name, spdk_strerror(-rc));
3737 0 : free(ctx);
3738 0 : goto out;
3739 : }
3740 :
3741 : /* after this base bdev is configured, examine other base bdevs that may be present */
3742 0 : spdk_uuid_copy(&ctx->raid_bdev_uuid, &sb->uuid);
3743 0 : ctx->cb_fn = cb_fn;
3744 0 : ctx->cb_ctx = cb_ctx;
3745 :
3746 0 : cb_fn = raid_bdev_examine_others;
3747 0 : cb_ctx = ctx;
3748 : }
3749 :
3750 0 : if (raid_bdev->state == RAID_BDEV_STATE_ONLINE) {
3751 0 : assert(sb_base_bdev->slot < raid_bdev->num_base_bdevs);
3752 0 : base_info = &raid_bdev->base_bdev_info[sb_base_bdev->slot];
3753 0 : assert(base_info->is_configured == false);
3754 0 : assert(sb_base_bdev->state == RAID_SB_BASE_BDEV_MISSING ||
3755 : sb_base_bdev->state == RAID_SB_BASE_BDEV_FAILED);
3756 0 : assert(spdk_uuid_is_null(&base_info->uuid));
3757 0 : spdk_uuid_copy(&base_info->uuid, &sb_base_bdev->uuid);
3758 0 : SPDK_NOTICELOG("Re-adding bdev %s to raid bdev %s.\n", bdev->name, raid_bdev->bdev.name);
3759 0 : rc = raid_bdev_configure_base_bdev(base_info, true, cb_fn, cb_ctx);
3760 0 : if (rc != 0) {
3761 0 : SPDK_ERRLOG("Failed to configure bdev %s as base bdev of raid %s: %s\n",
3762 : bdev->name, raid_bdev->bdev.name, spdk_strerror(-rc));
3763 : }
3764 0 : goto out;
3765 : }
3766 :
3767 0 : if (sb_base_bdev->state != RAID_SB_BASE_BDEV_CONFIGURED) {
3768 0 : SPDK_NOTICELOG("Bdev %s is not an active member of raid bdev %s. Ignoring.\n",
3769 : bdev->name, raid_bdev->bdev.name);
3770 0 : rc = -EINVAL;
3771 0 : goto out;
3772 : }
3773 :
3774 0 : base_info = NULL;
3775 0 : RAID_FOR_EACH_BASE_BDEV(raid_bdev, iter) {
3776 0 : if (spdk_uuid_compare(&iter->uuid, spdk_bdev_get_uuid(bdev)) == 0) {
3777 0 : base_info = iter;
3778 0 : break;
3779 : }
3780 : }
3781 :
3782 0 : if (base_info == NULL) {
3783 0 : SPDK_ERRLOG("Bdev %s is not a member of raid bdev %s\n",
3784 : bdev->name, raid_bdev->bdev.name);
3785 0 : rc = -EINVAL;
3786 0 : goto out;
3787 : }
3788 :
3789 0 : if (base_info->is_configured) {
3790 0 : rc = -EEXIST;
3791 0 : goto out;
3792 : }
3793 :
3794 0 : rc = raid_bdev_configure_base_bdev(base_info, true, cb_fn, cb_ctx);
3795 0 : if (rc != 0) {
3796 0 : SPDK_ERRLOG("Failed to configure bdev %s as base bdev of raid %s: %s\n",
3797 : bdev->name, raid_bdev->bdev.name, spdk_strerror(-rc));
3798 : }
3799 0 : out:
3800 0 : if (rc != 0 && cb_fn != 0) {
3801 0 : cb_fn(cb_ctx, rc);
3802 : }
3803 0 : }
3804 :
3805 : struct raid_bdev_examine_ctx {
3806 : struct spdk_bdev_desc *desc;
3807 : struct spdk_io_channel *ch;
3808 : raid_bdev_examine_load_sb_cb cb;
3809 : void *cb_ctx;
3810 : };
3811 :
3812 : static void
3813 0 : raid_bdev_examine_ctx_free(struct raid_bdev_examine_ctx *ctx)
3814 : {
3815 0 : if (!ctx) {
3816 0 : return;
3817 : }
3818 :
3819 0 : if (ctx->ch) {
3820 0 : spdk_put_io_channel(ctx->ch);
3821 : }
3822 :
3823 0 : if (ctx->desc) {
3824 0 : spdk_bdev_close(ctx->desc);
3825 : }
3826 :
3827 0 : free(ctx);
3828 : }
3829 :
3830 : static void
3831 0 : raid_bdev_examine_load_sb_done(const struct raid_bdev_superblock *sb, int status, void *_ctx)
3832 : {
3833 0 : struct raid_bdev_examine_ctx *ctx = _ctx;
3834 0 : struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(ctx->desc);
3835 :
3836 0 : ctx->cb(bdev, sb, status, ctx->cb_ctx);
3837 :
3838 0 : raid_bdev_examine_ctx_free(ctx);
3839 0 : }
3840 :
3841 : static void
3842 0 : raid_bdev_examine_event_cb(enum spdk_bdev_event_type type, struct spdk_bdev *bdev, void *event_ctx)
3843 : {
3844 0 : }
3845 :
3846 : static int
3847 0 : raid_bdev_examine_load_sb(const char *bdev_name, raid_bdev_examine_load_sb_cb cb, void *cb_ctx)
3848 : {
3849 : struct raid_bdev_examine_ctx *ctx;
3850 : int rc;
3851 :
3852 0 : assert(cb != NULL);
3853 :
3854 0 : ctx = calloc(1, sizeof(*ctx));
3855 0 : if (!ctx) {
3856 0 : return -ENOMEM;
3857 : }
3858 :
3859 0 : rc = spdk_bdev_open_ext(bdev_name, false, raid_bdev_examine_event_cb, NULL, &ctx->desc);
3860 0 : if (rc) {
3861 0 : SPDK_ERRLOG("Failed to open bdev %s: %s\n", bdev_name, spdk_strerror(-rc));
3862 0 : goto err;
3863 : }
3864 :
3865 0 : ctx->ch = spdk_bdev_get_io_channel(ctx->desc);
3866 0 : if (!ctx->ch) {
3867 0 : SPDK_ERRLOG("Failed to get io channel for bdev %s\n", bdev_name);
3868 0 : rc = -ENOMEM;
3869 0 : goto err;
3870 : }
3871 :
3872 0 : ctx->cb = cb;
3873 0 : ctx->cb_ctx = cb_ctx;
3874 :
3875 0 : rc = raid_bdev_load_base_bdev_superblock(ctx->desc, ctx->ch, raid_bdev_examine_load_sb_done, ctx);
3876 0 : if (rc) {
3877 0 : SPDK_ERRLOG("Failed to read bdev %s superblock: %s\n",
3878 : bdev_name, spdk_strerror(-rc));
3879 0 : goto err;
3880 : }
3881 :
3882 0 : return 0;
3883 0 : err:
3884 0 : raid_bdev_examine_ctx_free(ctx);
3885 0 : return rc;
3886 : }
3887 :
3888 : static void
3889 0 : raid_bdev_examine_done(void *ctx, int status)
3890 : {
3891 0 : struct spdk_bdev *bdev = ctx;
3892 :
3893 0 : if (status != 0) {
3894 0 : SPDK_ERRLOG("Failed to examine bdev %s: %s\n",
3895 : bdev->name, spdk_strerror(-status));
3896 : }
3897 0 : spdk_bdev_module_examine_done(&g_raid_if);
3898 0 : }
3899 :
3900 : static void
3901 0 : raid_bdev_examine_cont(struct spdk_bdev *bdev, const struct raid_bdev_superblock *sb, int status,
3902 : void *ctx)
3903 : {
3904 0 : switch (status) {
3905 0 : case 0:
3906 : /* valid superblock found */
3907 0 : SPDK_DEBUGLOG(bdev_raid, "raid superblock found on bdev %s\n", bdev->name);
3908 0 : raid_bdev_examine_sb(sb, bdev, raid_bdev_examine_done, bdev);
3909 0 : return;
3910 0 : case -EINVAL:
3911 : /* no valid superblock, check if it can be claimed anyway */
3912 0 : raid_bdev_examine_no_sb(bdev);
3913 0 : status = 0;
3914 0 : break;
3915 : }
3916 :
3917 0 : raid_bdev_examine_done(bdev, status);
3918 : }
3919 :
3920 : /*
3921 : * brief:
3922 : * raid_bdev_examine function is the examine function call by the below layers
3923 : * like bdev_nvme layer. This function will check if this base bdev can be
3924 : * claimed by this raid bdev or not.
3925 : * params:
3926 : * bdev - pointer to base bdev
3927 : * returns:
3928 : * none
3929 : */
3930 : static void
3931 0 : raid_bdev_examine(struct spdk_bdev *bdev)
3932 : {
3933 0 : int rc = 0;
3934 :
3935 0 : if (raid_bdev_find_base_info_by_bdev(bdev) != NULL) {
3936 0 : goto done;
3937 : }
3938 :
3939 0 : if (spdk_bdev_get_dif_type(bdev) != SPDK_DIF_DISABLE) {
3940 0 : raid_bdev_examine_no_sb(bdev);
3941 0 : goto done;
3942 : }
3943 :
3944 0 : rc = raid_bdev_examine_load_sb(bdev->name, raid_bdev_examine_cont, NULL);
3945 0 : if (rc != 0) {
3946 0 : goto done;
3947 : }
3948 :
3949 0 : return;
3950 0 : done:
3951 0 : raid_bdev_examine_done(bdev, rc);
3952 : }
3953 :
3954 : /* Log component for bdev raid bdev module */
3955 1 : SPDK_LOG_REGISTER_COMPONENT(bdev_raid)
3956 :
3957 : static void
3958 0 : bdev_raid_trace(void)
3959 : {
3960 0 : struct spdk_trace_tpoint_opts opts[] = {
3961 : {
3962 : "BDEV_RAID_IO_START", TRACE_BDEV_RAID_IO_START,
3963 : OWNER_TYPE_NONE, OBJECT_BDEV_RAID_IO, 1,
3964 : {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
3965 : },
3966 : {
3967 : "BDEV_RAID_IO_DONE", TRACE_BDEV_RAID_IO_DONE,
3968 : OWNER_TYPE_NONE, OBJECT_BDEV_RAID_IO, 0,
3969 : {{ "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 }}
3970 : }
3971 : };
3972 :
3973 :
3974 0 : spdk_trace_register_object(OBJECT_BDEV_RAID_IO, 'R');
3975 0 : spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
3976 0 : spdk_trace_tpoint_register_relation(TRACE_BDEV_IO_START, OBJECT_BDEV_RAID_IO, 1);
3977 0 : spdk_trace_tpoint_register_relation(TRACE_BDEV_IO_DONE, OBJECT_BDEV_RAID_IO, 0);
3978 0 : }
3979 1 : SPDK_TRACE_REGISTER_FN(bdev_raid_trace, "bdev_raid", TRACE_GROUP_BDEV_RAID)
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