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, 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
5 : */
6 :
7 : #include "spdk/stdinc.h"
8 :
9 : #include "spdk/init.h"
10 : #include "spdk/util.h"
11 : #include "spdk/file.h"
12 : #include "spdk/log.h"
13 : #include "spdk/env.h"
14 : #include "spdk/thread.h"
15 : #include "spdk/jsonrpc.h"
16 : #include "spdk/rpc.h"
17 : #include "spdk/string.h"
18 :
19 : #include "spdk_internal/event.h"
20 :
21 : #define SPDK_DEBUG_APP_CFG(...) SPDK_DEBUGLOG(app_config, __VA_ARGS__)
22 :
23 : /* JSON configuration format is as follows
24 : *
25 : * {
26 : * "subsystems" : [ <<== *subsystems JSON array
27 : * { <<== *subsystems_it array entry pointer (iterator)
28 : * "subsystem": "<< SUBSYSTEM NAME >>",
29 : * "config": [ <<== *config JSON array
30 : * { <<== *config_it array entry pointer (iterator)
31 : * "method": "<< METHOD NAME >>", <<== *method
32 : * "params": { << PARAMS >> } <<== *params
33 : * },
34 : * << MORE "config" ARRY ENTRIES >>
35 : * ]
36 : * },
37 : * << MORE "subsystems" ARRAY ENTRIES >>
38 : * ]
39 : *
40 : * << ANYTHING ELSE IS IGNORED IN ROOT OBJECT>>
41 : * }
42 : *
43 : */
44 :
45 : struct load_json_config_ctx;
46 : typedef void (*client_resp_handler)(struct load_json_config_ctx *,
47 : struct spdk_jsonrpc_client_response *);
48 :
49 : #define RPC_SOCKET_PATH_MAX SPDK_SIZEOF_MEMBER(struct sockaddr_un, sun_path)
50 :
51 : /* 1s connections timeout */
52 : #define RPC_CLIENT_CONNECT_TIMEOUT_US (1U * 1000U * 1000U)
53 :
54 : /*
55 : * Currently there is no timeout in SPDK for any RPC command. This result that
56 : * we can't put a hard limit during configuration load as it most likely randomly fail.
57 : * So just print WARNLOG every 10s. */
58 : #define RPC_CLIENT_REQUEST_TIMEOUT_US (10U * 1000 * 1000)
59 :
60 : struct load_json_config_ctx {
61 : /* Thread used during configuration. */
62 : struct spdk_thread *thread;
63 : spdk_subsystem_init_fn cb_fn;
64 : void *cb_arg;
65 : bool stop_on_error;
66 :
67 : /* Current subsystem */
68 : struct spdk_json_val *subsystems; /* "subsystems" array */
69 : struct spdk_json_val *subsystems_it; /* current subsystem array position in "subsystems" array */
70 :
71 : struct spdk_json_val *subsystem_name; /* current subsystem name */
72 :
73 : /* Current "config" entry we are processing */
74 : struct spdk_json_val *config; /* "config" array */
75 : struct spdk_json_val *config_it; /* current config position in "config" array */
76 :
77 : /* Current request id we are sending. */
78 : uint32_t rpc_request_id;
79 :
80 : /* Whole configuration file read and parsed. */
81 : size_t json_data_size;
82 : char *json_data;
83 :
84 : size_t values_cnt;
85 : struct spdk_json_val *values;
86 :
87 : char rpc_socket_path_temp[RPC_SOCKET_PATH_MAX + 1];
88 :
89 : struct spdk_jsonrpc_client *client_conn;
90 : struct spdk_poller *client_conn_poller;
91 :
92 : client_resp_handler client_resp_cb;
93 :
94 : /* Timeout for current RPC client action. */
95 : uint64_t timeout;
96 : };
97 :
98 : static void app_json_config_load_subsystem(void *_ctx);
99 :
100 : static void
101 0 : app_json_config_load_done(struct load_json_config_ctx *ctx, int rc)
102 : {
103 0 : spdk_poller_unregister(&ctx->client_conn_poller);
104 0 : if (ctx->client_conn != NULL) {
105 0 : spdk_jsonrpc_client_close(ctx->client_conn);
106 : }
107 :
108 0 : spdk_rpc_finish();
109 :
110 0 : SPDK_DEBUG_APP_CFG("Config load finished with rc %d\n", rc);
111 0 : ctx->cb_fn(rc, ctx->cb_arg);
112 :
113 0 : free(ctx->json_data);
114 0 : free(ctx->values);
115 0 : free(ctx);
116 0 : }
117 :
118 : static void
119 0 : rpc_client_set_timeout(struct load_json_config_ctx *ctx, uint64_t timeout_us)
120 : {
121 0 : ctx->timeout = spdk_get_ticks() + timeout_us * spdk_get_ticks_hz() / (1000 * 1000);
122 0 : }
123 :
124 : static int
125 0 : rpc_client_check_timeout(struct load_json_config_ctx *ctx)
126 : {
127 0 : if (ctx->timeout < spdk_get_ticks()) {
128 0 : SPDK_WARNLOG("RPC client command timeout.\n");
129 0 : return -ETIMEDOUT;
130 : }
131 :
132 0 : return 0;
133 : }
134 :
135 : struct json_write_buf {
136 : char data[1024];
137 : unsigned cur_off;
138 : };
139 :
140 : static int
141 0 : json_write_stdout(void *cb_ctx, const void *data, size_t size)
142 : {
143 0 : struct json_write_buf *buf = cb_ctx;
144 : size_t rc;
145 :
146 0 : rc = snprintf(buf->data + buf->cur_off, sizeof(buf->data) - buf->cur_off,
147 : "%s", (const char *)data);
148 0 : if (rc > 0) {
149 0 : buf->cur_off += rc;
150 : }
151 0 : return rc == size ? 0 : -1;
152 : }
153 :
154 : static int
155 0 : rpc_client_poller(void *arg)
156 : {
157 0 : struct load_json_config_ctx *ctx = arg;
158 : struct spdk_jsonrpc_client_response *resp;
159 : client_resp_handler cb;
160 : int rc;
161 :
162 0 : assert(spdk_get_thread() == ctx->thread);
163 :
164 0 : rc = spdk_jsonrpc_client_poll(ctx->client_conn, 0);
165 0 : if (rc == 0) {
166 0 : rc = rpc_client_check_timeout(ctx);
167 0 : if (rc == -ETIMEDOUT) {
168 0 : rpc_client_set_timeout(ctx, RPC_CLIENT_REQUEST_TIMEOUT_US);
169 0 : rc = 0;
170 : }
171 : }
172 :
173 0 : if (rc == 0) {
174 : /* No response yet */
175 0 : return SPDK_POLLER_BUSY;
176 0 : } else if (rc < 0) {
177 0 : app_json_config_load_done(ctx, rc);
178 0 : return SPDK_POLLER_BUSY;
179 : }
180 :
181 0 : resp = spdk_jsonrpc_client_get_response(ctx->client_conn);
182 0 : assert(resp);
183 :
184 0 : if (resp->error) {
185 0 : struct json_write_buf buf = {};
186 0 : struct spdk_json_write_ctx *w = spdk_json_write_begin(json_write_stdout,
187 : &buf, SPDK_JSON_PARSE_FLAG_DECODE_IN_PLACE);
188 :
189 0 : if (w == NULL) {
190 0 : SPDK_ERRLOG("error response: (?)\n");
191 : } else {
192 0 : spdk_json_write_val(w, resp->error);
193 0 : spdk_json_write_end(w);
194 0 : SPDK_ERRLOG("error response: \n%s\n", buf.data);
195 : }
196 : }
197 :
198 0 : if (resp->error && ctx->stop_on_error) {
199 0 : spdk_jsonrpc_client_free_response(resp);
200 0 : app_json_config_load_done(ctx, -EINVAL);
201 : } else {
202 : /* We have response so we must have callback for it. */
203 0 : cb = ctx->client_resp_cb;
204 0 : assert(cb != NULL);
205 :
206 : /* Mark we are done with this handler. */
207 0 : ctx->client_resp_cb = NULL;
208 0 : cb(ctx, resp);
209 : }
210 :
211 :
212 0 : return SPDK_POLLER_BUSY;
213 : }
214 :
215 : static int
216 0 : rpc_client_connect_poller(void *_ctx)
217 : {
218 0 : struct load_json_config_ctx *ctx = _ctx;
219 : int rc;
220 :
221 0 : rc = spdk_jsonrpc_client_poll(ctx->client_conn, 0);
222 0 : if (rc != -ENOTCONN) {
223 : /* We are connected. Start regular poller and issue first request */
224 0 : spdk_poller_unregister(&ctx->client_conn_poller);
225 0 : ctx->client_conn_poller = SPDK_POLLER_REGISTER(rpc_client_poller, ctx, 100);
226 0 : app_json_config_load_subsystem(ctx);
227 : } else {
228 0 : rc = rpc_client_check_timeout(ctx);
229 0 : if (rc) {
230 0 : app_json_config_load_done(ctx, rc);
231 : }
232 :
233 0 : return SPDK_POLLER_IDLE;
234 : }
235 :
236 0 : return SPDK_POLLER_BUSY;
237 : }
238 :
239 : static int
240 0 : client_send_request(struct load_json_config_ctx *ctx, struct spdk_jsonrpc_client_request *request,
241 : client_resp_handler client_resp_cb)
242 : {
243 : int rc;
244 :
245 0 : assert(spdk_get_thread() == ctx->thread);
246 :
247 0 : ctx->client_resp_cb = client_resp_cb;
248 0 : rpc_client_set_timeout(ctx, RPC_CLIENT_REQUEST_TIMEOUT_US);
249 0 : rc = spdk_jsonrpc_client_send_request(ctx->client_conn, request);
250 :
251 0 : if (rc) {
252 0 : SPDK_DEBUG_APP_CFG("Sending request to client failed (%d)\n", rc);
253 : }
254 :
255 0 : return rc;
256 : }
257 :
258 : static int
259 0 : cap_string(const struct spdk_json_val *val, void *out)
260 : {
261 0 : const struct spdk_json_val **vptr = out;
262 :
263 0 : if (val->type != SPDK_JSON_VAL_STRING) {
264 0 : return -EINVAL;
265 : }
266 :
267 0 : *vptr = val;
268 0 : return 0;
269 : }
270 :
271 : static int
272 0 : cap_object(const struct spdk_json_val *val, void *out)
273 : {
274 0 : const struct spdk_json_val **vptr = out;
275 :
276 0 : if (val->type != SPDK_JSON_VAL_OBJECT_BEGIN) {
277 0 : return -EINVAL;
278 : }
279 :
280 0 : *vptr = val;
281 0 : return 0;
282 : }
283 :
284 :
285 : static int
286 0 : cap_array_or_null(const struct spdk_json_val *val, void *out)
287 : {
288 0 : const struct spdk_json_val **vptr = out;
289 :
290 0 : if (val->type != SPDK_JSON_VAL_ARRAY_BEGIN && val->type != SPDK_JSON_VAL_NULL) {
291 0 : return -EINVAL;
292 : }
293 :
294 0 : *vptr = val;
295 0 : return 0;
296 : }
297 :
298 : struct config_entry {
299 : char *method;
300 : struct spdk_json_val *params;
301 : };
302 :
303 : static struct spdk_json_object_decoder jsonrpc_cmd_decoders[] = {
304 : {"method", offsetof(struct config_entry, method), spdk_json_decode_string},
305 : {"params", offsetof(struct config_entry, params), cap_object, true}
306 : };
307 :
308 : static void app_json_config_load_subsystem_config_entry(void *_ctx);
309 :
310 : static void
311 0 : app_json_config_load_subsystem_config_entry_next(struct load_json_config_ctx *ctx,
312 : struct spdk_jsonrpc_client_response *resp)
313 : {
314 : /* Don't care about the response */
315 0 : spdk_jsonrpc_client_free_response(resp);
316 :
317 0 : ctx->config_it = spdk_json_next(ctx->config_it);
318 0 : app_json_config_load_subsystem_config_entry(ctx);
319 0 : }
320 :
321 : /* Load "config" entry */
322 : static void
323 0 : app_json_config_load_subsystem_config_entry(void *_ctx)
324 : {
325 0 : struct load_json_config_ctx *ctx = _ctx;
326 : struct spdk_jsonrpc_client_request *rpc_request;
327 : struct spdk_json_write_ctx *w;
328 0 : struct config_entry cfg = {};
329 : struct spdk_json_val *params_end;
330 0 : size_t params_len = 0;
331 0 : uint32_t state_mask = 0, cur_state_mask, startup_runtime = SPDK_RPC_STARTUP | SPDK_RPC_RUNTIME;
332 : int rc;
333 :
334 0 : if (ctx->config_it == NULL) {
335 0 : SPDK_DEBUG_APP_CFG("Subsystem '%.*s': configuration done.\n", ctx->subsystem_name->len,
336 : (char *)ctx->subsystem_name->start);
337 0 : ctx->subsystems_it = spdk_json_next(ctx->subsystems_it);
338 : /* Invoke later to avoid recurrence */
339 0 : spdk_thread_send_msg(ctx->thread, app_json_config_load_subsystem, ctx);
340 0 : return;
341 : }
342 :
343 0 : if (spdk_json_decode_object(ctx->config_it, jsonrpc_cmd_decoders,
344 : SPDK_COUNTOF(jsonrpc_cmd_decoders), &cfg)) {
345 0 : SPDK_ERRLOG("Failed to decode config entry\n");
346 0 : app_json_config_load_done(ctx, -EINVAL);
347 0 : goto out;
348 : }
349 :
350 0 : rc = spdk_rpc_get_method_state_mask(cfg.method, &state_mask);
351 0 : if (rc == -ENOENT) {
352 0 : SPDK_ERRLOG("Method '%s' was not found\n", cfg.method);
353 0 : app_json_config_load_done(ctx, rc);
354 0 : goto out;
355 : }
356 0 : cur_state_mask = spdk_rpc_get_state();
357 0 : if ((state_mask & cur_state_mask) != cur_state_mask) {
358 0 : SPDK_DEBUG_APP_CFG("Method '%s' not allowed -> skipping\n", cfg.method);
359 : /* Invoke later to avoid recurrence */
360 0 : ctx->config_it = spdk_json_next(ctx->config_it);
361 0 : spdk_thread_send_msg(ctx->thread, app_json_config_load_subsystem_config_entry, ctx);
362 0 : goto out;
363 : }
364 0 : if ((state_mask & startup_runtime) == startup_runtime && cur_state_mask == SPDK_RPC_RUNTIME) {
365 : /* Some methods are allowed to be run in both STARTUP and RUNTIME states.
366 : * We should not call such methods twice, so ignore the second attempt in RUNTIME state */
367 0 : SPDK_DEBUG_APP_CFG("Method '%s' has already been run in STARTUP state\n", cfg.method);
368 : /* Invoke later to avoid recurrence */
369 0 : ctx->config_it = spdk_json_next(ctx->config_it);
370 0 : spdk_thread_send_msg(ctx->thread, app_json_config_load_subsystem_config_entry, ctx);
371 0 : goto out;
372 : }
373 :
374 0 : SPDK_DEBUG_APP_CFG("\tmethod: %s\n", cfg.method);
375 :
376 0 : if (cfg.params) {
377 : /* Get _END by skipping params and going back by one element. */
378 0 : params_end = cfg.params + spdk_json_val_len(cfg.params) - 1;
379 :
380 : /* Need to add one character to include '}' */
381 0 : params_len = params_end->start - cfg.params->start + 1;
382 :
383 0 : SPDK_DEBUG_APP_CFG("\tparams: %.*s\n", (int)params_len, (char *)cfg.params->start);
384 : }
385 :
386 0 : rpc_request = spdk_jsonrpc_client_create_request();
387 0 : if (!rpc_request) {
388 0 : app_json_config_load_done(ctx, -errno);
389 0 : goto out;
390 : }
391 :
392 0 : w = spdk_jsonrpc_begin_request(rpc_request, ctx->rpc_request_id, NULL);
393 0 : if (!w) {
394 0 : spdk_jsonrpc_client_free_request(rpc_request);
395 0 : app_json_config_load_done(ctx, -ENOMEM);
396 0 : goto out;
397 : }
398 :
399 0 : spdk_json_write_named_string(w, "method", cfg.method);
400 :
401 0 : if (cfg.params) {
402 : /* No need to parse "params". Just dump the whole content of "params"
403 : * directly into the request and let the remote side verify it. */
404 0 : spdk_json_write_name(w, "params");
405 0 : spdk_json_write_val_raw(w, cfg.params->start, params_len);
406 : }
407 :
408 0 : spdk_jsonrpc_end_request(rpc_request, w);
409 :
410 0 : rc = client_send_request(ctx, rpc_request, app_json_config_load_subsystem_config_entry_next);
411 0 : if (rc != 0) {
412 0 : app_json_config_load_done(ctx, -rc);
413 0 : goto out;
414 : }
415 0 : out:
416 0 : free(cfg.method);
417 : }
418 :
419 : static void
420 0 : subsystem_init_done(int rc, void *arg1)
421 : {
422 0 : struct load_json_config_ctx *ctx = arg1;
423 :
424 0 : if (rc) {
425 0 : app_json_config_load_done(ctx, rc);
426 0 : return;
427 : }
428 :
429 0 : spdk_rpc_set_state(SPDK_RPC_RUNTIME);
430 : /* Another round. This time for RUNTIME methods */
431 0 : SPDK_DEBUG_APP_CFG("'framework_start_init' done - continuing configuration\n");
432 :
433 0 : assert(ctx != NULL);
434 0 : if (ctx->subsystems) {
435 0 : ctx->subsystems_it = spdk_json_array_first(ctx->subsystems);
436 : }
437 :
438 0 : app_json_config_load_subsystem(ctx);
439 : }
440 :
441 : static struct spdk_json_object_decoder subsystem_decoders[] = {
442 : {"subsystem", offsetof(struct load_json_config_ctx, subsystem_name), cap_string},
443 : {"config", offsetof(struct load_json_config_ctx, config), cap_array_or_null}
444 : };
445 :
446 : /*
447 : * Start loading subsystem pointed by ctx->subsystems_it. This must point to the
448 : * beginning of the "subsystem" object in "subsystems" array or be NULL. If it is
449 : * NULL then no more subsystems to load.
450 : *
451 : * There are two iterations:
452 : *
453 : * In first iteration only STARTUP RPC methods are used, other methods are ignored. When
454 : * allsubsystems are walked the ctx->subsystems_it became NULL and "framework_start_init"
455 : * is called to let the SPDK move to RUNTIME state (initialize all subsystems) and
456 : * second iteration begins.
457 : *
458 : * In second iteration "subsystems" array is walked through again, this time only
459 : * RUNTIME RPC methods are used. When ctx->subsystems_it became NULL second time it
460 : * indicate that there is no more subsystems to load. The cb_fn is called to finish
461 : * configuration.
462 : */
463 : static void
464 0 : app_json_config_load_subsystem(void *_ctx)
465 : {
466 0 : struct load_json_config_ctx *ctx = _ctx;
467 :
468 0 : if (ctx->subsystems_it == NULL) {
469 0 : if (spdk_rpc_get_state() == SPDK_RPC_STARTUP) {
470 0 : SPDK_DEBUG_APP_CFG("No more entries for current state, calling 'framework_start_init'\n");
471 0 : spdk_subsystem_init(subsystem_init_done, ctx);
472 : } else {
473 0 : app_json_config_load_done(ctx, 0);
474 : }
475 :
476 0 : return;
477 : }
478 :
479 : /* Capture subsystem name and config array */
480 0 : if (spdk_json_decode_object(ctx->subsystems_it, subsystem_decoders,
481 : SPDK_COUNTOF(subsystem_decoders), ctx)) {
482 0 : SPDK_ERRLOG("Failed to parse subsystem configuration\n");
483 0 : app_json_config_load_done(ctx, -EINVAL);
484 0 : return;
485 : }
486 :
487 0 : SPDK_DEBUG_APP_CFG("Loading subsystem '%.*s' configuration\n", ctx->subsystem_name->len,
488 : (char *)ctx->subsystem_name->start);
489 :
490 : /* Get 'config' array first configuration entry */
491 0 : ctx->config_it = spdk_json_array_first(ctx->config);
492 0 : app_json_config_load_subsystem_config_entry(ctx);
493 : }
494 :
495 : static void *
496 0 : read_file(const char *filename, size_t *size)
497 : {
498 0 : FILE *file = fopen(filename, "r");
499 : void *data;
500 :
501 0 : if (file == NULL) {
502 : /* errno is set by fopen */
503 0 : return NULL;
504 : }
505 :
506 0 : data = spdk_posix_file_load(file, size);
507 0 : fclose(file);
508 0 : return data;
509 : }
510 :
511 : static int
512 0 : app_json_config_read(const char *config_file, struct load_json_config_ctx *ctx)
513 : {
514 0 : struct spdk_json_val *values = NULL;
515 0 : void *json = NULL, *end;
516 : ssize_t values_cnt, rc;
517 0 : size_t json_size;
518 :
519 0 : json = read_file(config_file, &json_size);
520 0 : if (!json) {
521 0 : SPDK_ERRLOG("Read JSON configuration file %s failed: %s\n",
522 : config_file, spdk_strerror(errno));
523 0 : return -errno;
524 : }
525 :
526 0 : rc = spdk_json_parse(json, json_size, NULL, 0, &end,
527 : SPDK_JSON_PARSE_FLAG_ALLOW_COMMENTS);
528 0 : if (rc < 0) {
529 0 : SPDK_ERRLOG("Parsing JSON configuration failed (%zd)\n", rc);
530 0 : goto err;
531 : }
532 :
533 0 : values_cnt = rc;
534 0 : values = calloc(values_cnt, sizeof(struct spdk_json_val));
535 0 : if (values == NULL) {
536 0 : SPDK_ERRLOG("Out of memory\n");
537 0 : goto err;
538 : }
539 :
540 0 : rc = spdk_json_parse(json, json_size, values, values_cnt, &end,
541 : SPDK_JSON_PARSE_FLAG_ALLOW_COMMENTS);
542 0 : if (rc != values_cnt) {
543 0 : SPDK_ERRLOG("Parsing JSON configuration failed (%zd)\n", rc);
544 0 : goto err;
545 : }
546 :
547 0 : ctx->json_data = json;
548 0 : ctx->json_data_size = json_size;
549 :
550 0 : ctx->values = values;
551 0 : ctx->values_cnt = values_cnt;
552 :
553 0 : return 0;
554 0 : err:
555 0 : free(json);
556 0 : free(values);
557 0 : return rc;
558 : }
559 :
560 : void
561 0 : spdk_subsystem_init_from_json_config(const char *json_config_file, const char *rpc_addr,
562 : spdk_subsystem_init_fn cb_fn, void *cb_arg,
563 : bool stop_on_error)
564 : {
565 0 : struct load_json_config_ctx *ctx = calloc(1, sizeof(*ctx));
566 : int rc;
567 :
568 0 : assert(cb_fn);
569 0 : if (!ctx) {
570 0 : cb_fn(-ENOMEM, cb_arg);
571 0 : return;
572 : }
573 :
574 0 : ctx->cb_fn = cb_fn;
575 0 : ctx->cb_arg = cb_arg;
576 0 : ctx->stop_on_error = stop_on_error;
577 0 : ctx->thread = spdk_get_thread();
578 :
579 0 : rc = app_json_config_read(json_config_file, ctx);
580 0 : if (rc) {
581 0 : goto fail;
582 : }
583 :
584 : /* Capture subsystems array */
585 0 : rc = spdk_json_find_array(ctx->values, "subsystems", NULL, &ctx->subsystems);
586 0 : switch (rc) {
587 0 : case 0:
588 : /* Get first subsystem */
589 0 : ctx->subsystems_it = spdk_json_array_first(ctx->subsystems);
590 0 : if (ctx->subsystems_it == NULL) {
591 0 : SPDK_NOTICELOG("'subsystems' configuration is empty\n");
592 : }
593 0 : break;
594 0 : case -EPROTOTYPE:
595 0 : SPDK_ERRLOG("Invalid JSON configuration: not enclosed in {}.\n");
596 0 : goto fail;
597 0 : case -ENOENT:
598 0 : SPDK_WARNLOG("No 'subsystems' key JSON configuration file.\n");
599 0 : break;
600 0 : case -EDOM:
601 0 : SPDK_ERRLOG("Invalid JSON configuration: 'subsystems' should be an array.\n");
602 0 : goto fail;
603 0 : default:
604 0 : SPDK_ERRLOG("Failed to parse JSON configuration.\n");
605 0 : goto fail;
606 : }
607 :
608 : /* If rpc_addr is not an Unix socket use default address as prefix. */
609 0 : if (rpc_addr == NULL || rpc_addr[0] != '/') {
610 0 : rpc_addr = SPDK_DEFAULT_RPC_ADDR;
611 : }
612 :
613 : /* FIXME: rpc client should use socketpair() instead of this temporary socket nonsense */
614 0 : rc = snprintf(ctx->rpc_socket_path_temp, sizeof(ctx->rpc_socket_path_temp), "%s.%d_config",
615 : rpc_addr, getpid());
616 0 : if (rc >= (int)sizeof(ctx->rpc_socket_path_temp)) {
617 0 : SPDK_ERRLOG("Socket name create failed\n");
618 0 : goto fail;
619 : }
620 :
621 0 : rc = spdk_rpc_initialize(ctx->rpc_socket_path_temp, NULL);
622 0 : if (rc) {
623 0 : goto fail;
624 : }
625 :
626 0 : ctx->client_conn = spdk_jsonrpc_client_connect(ctx->rpc_socket_path_temp, AF_UNIX);
627 0 : if (ctx->client_conn == NULL) {
628 0 : SPDK_ERRLOG("Failed to connect to '%s'\n", ctx->rpc_socket_path_temp);
629 0 : goto fail;
630 : }
631 :
632 0 : rpc_client_set_timeout(ctx, RPC_CLIENT_CONNECT_TIMEOUT_US);
633 0 : ctx->client_conn_poller = SPDK_POLLER_REGISTER(rpc_client_connect_poller, ctx, 100);
634 0 : return;
635 :
636 0 : fail:
637 0 : app_json_config_load_done(ctx, -EINVAL);
638 : }
639 :
640 0 : SPDK_LOG_REGISTER_COMPONENT(app_config)
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