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1c2facd1 RW |
1 | /* |
2 | * Copyright (C) 2018 NetDEF, Inc. | |
3 | * Renato Westphal | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; either version 2 of the License, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
20 | #include <zebra.h> | |
21 | ||
22 | #include "libfrr.h" | |
23 | #include "log.h" | |
24 | #include "lib_errors.h" | |
ccd43ada | 25 | #include "hash.h" |
1c2facd1 | 26 | #include "command.h" |
9eb2c0a1 | 27 | #include "debug.h" |
1c2facd1 | 28 | #include "db.h" |
00dffa8c | 29 | #include "frr_pthread.h" |
1c2facd1 RW |
30 | #include "northbound.h" |
31 | #include "northbound_cli.h" | |
32 | #include "northbound_db.h" | |
f7c20aa1 | 33 | #include "frrstr.h" |
1c2facd1 RW |
34 | |
35 | DEFINE_MTYPE_STATIC(LIB, NB_NODE, "Northbound Node") | |
36 | DEFINE_MTYPE_STATIC(LIB, NB_CONFIG, "Northbound Configuration") | |
ccd43ada | 37 | DEFINE_MTYPE_STATIC(LIB, NB_CONFIG_ENTRY, "Northbound Configuration Entry") |
1c2facd1 RW |
38 | |
39 | /* Running configuration - shouldn't be modified directly. */ | |
40 | struct nb_config *running_config; | |
41 | ||
ccd43ada RW |
42 | /* Hash table of user pointers associated with configuration entries. */ |
43 | static struct hash *running_config_entries; | |
44 | ||
364ad673 RW |
45 | /* Management lock for the running configuration. */ |
46 | static struct { | |
47 | /* Mutex protecting this structure. */ | |
48 | pthread_mutex_t mtx; | |
49 | ||
50 | /* Actual lock. */ | |
51 | bool locked; | |
52 | ||
53 | /* Northbound client who owns this lock. */ | |
54 | enum nb_client owner_client; | |
55 | ||
56 | /* Northbound user who owns this lock. */ | |
57 | const void *owner_user; | |
58 | } running_config_mgmt_lock; | |
59 | ||
390a8862 CS |
60 | /* Knob to record config transaction */ |
61 | static bool nb_db_enabled; | |
1c2facd1 RW |
62 | /* |
63 | * Global lock used to prevent multiple configuration transactions from | |
64 | * happening concurrently. | |
65 | */ | |
66 | static bool transaction_in_progress; | |
67 | ||
13d6b9c1 RW |
68 | static int nb_callback_pre_validate(struct nb_context *context, |
69 | const struct nb_node *nb_node, | |
df5eda3d RW |
70 | const struct lyd_node *dnode, char *errmsg, |
71 | size_t errmsg_len); | |
13d6b9c1 RW |
72 | static int nb_callback_configuration(struct nb_context *context, |
73 | const enum nb_event event, | |
df5eda3d RW |
74 | struct nb_config_change *change, |
75 | char *errmsg, size_t errmsg_len); | |
76 | static struct nb_transaction * | |
77 | nb_transaction_new(struct nb_context *context, struct nb_config *config, | |
78 | struct nb_config_cbs *changes, const char *comment, | |
79 | char *errmsg, size_t errmsg_len); | |
1c2facd1 RW |
80 | static void nb_transaction_free(struct nb_transaction *transaction); |
81 | static int nb_transaction_process(enum nb_event event, | |
df5eda3d RW |
82 | struct nb_transaction *transaction, |
83 | char *errmsg, size_t errmsg_len); | |
84 | static void nb_transaction_apply_finish(struct nb_transaction *transaction, | |
85 | char *errmsg, size_t errmsg_len); | |
1a4bc045 RW |
86 | static int nb_oper_data_iter_node(const struct lys_node *snode, |
87 | const char *xpath, const void *list_entry, | |
88 | const struct yang_list_keys *list_keys, | |
89 | struct yang_translator *translator, | |
90 | bool first, uint32_t flags, | |
91 | nb_oper_data_cb cb, void *arg); | |
1c2facd1 | 92 | |
544ca69a RW |
93 | static int nb_node_check_config_only(const struct lys_node *snode, void *arg) |
94 | { | |
95 | bool *config_only = arg; | |
96 | ||
97 | if (CHECK_FLAG(snode->flags, LYS_CONFIG_R)) { | |
98 | *config_only = false; | |
99 | return YANG_ITER_STOP; | |
100 | } | |
101 | ||
102 | return YANG_ITER_CONTINUE; | |
103 | } | |
104 | ||
e0ccfad2 | 105 | static int nb_node_new_cb(const struct lys_node *snode, void *arg) |
1c2facd1 RW |
106 | { |
107 | struct nb_node *nb_node; | |
108 | struct lys_node *sparent, *sparent_list; | |
109 | ||
110 | nb_node = XCALLOC(MTYPE_NB_NODE, sizeof(*nb_node)); | |
111 | yang_snode_get_path(snode, YANG_PATH_DATA, nb_node->xpath, | |
112 | sizeof(nb_node->xpath)); | |
113 | nb_node->priority = NB_DFLT_PRIORITY; | |
114 | sparent = yang_snode_real_parent(snode); | |
115 | if (sparent) | |
116 | nb_node->parent = sparent->priv; | |
117 | sparent_list = yang_snode_parent_list(snode); | |
118 | if (sparent_list) | |
119 | nb_node->parent_list = sparent_list->priv; | |
120 | ||
544ca69a RW |
121 | /* Set flags. */ |
122 | if (CHECK_FLAG(snode->nodetype, LYS_CONTAINER | LYS_LIST)) { | |
123 | bool config_only = true; | |
124 | ||
7895c3bc DS |
125 | (void)yang_snodes_iterate_subtree(snode, NULL, |
126 | nb_node_check_config_only, 0, | |
127 | &config_only); | |
544ca69a RW |
128 | if (config_only) |
129 | SET_FLAG(nb_node->flags, F_NB_NODE_CONFIG_ONLY); | |
130 | } | |
99fb518f RW |
131 | if (CHECK_FLAG(snode->nodetype, LYS_LIST)) { |
132 | struct lys_node_list *slist; | |
133 | ||
134 | slist = (struct lys_node_list *)snode; | |
135 | if (slist->keys_size == 0) | |
136 | SET_FLAG(nb_node->flags, F_NB_NODE_KEYLESS_LIST); | |
137 | } | |
544ca69a | 138 | |
1c2facd1 RW |
139 | /* |
140 | * Link the northbound node and the libyang schema node with one | |
141 | * another. | |
142 | */ | |
143 | nb_node->snode = snode; | |
8a923b48 | 144 | assert(snode->priv == NULL); |
1c2facd1 | 145 | lys_set_private(snode, nb_node); |
e0ccfad2 RW |
146 | |
147 | return YANG_ITER_CONTINUE; | |
1c2facd1 RW |
148 | } |
149 | ||
e0ccfad2 | 150 | static int nb_node_del_cb(const struct lys_node *snode, void *arg) |
1c2facd1 RW |
151 | { |
152 | struct nb_node *nb_node; | |
153 | ||
154 | nb_node = snode->priv; | |
9bde0b25 RW |
155 | if (nb_node) { |
156 | lys_set_private(snode, NULL); | |
157 | XFREE(MTYPE_NB_NODE, nb_node); | |
158 | } | |
e0ccfad2 RW |
159 | |
160 | return YANG_ITER_CONTINUE; | |
1c2facd1 RW |
161 | } |
162 | ||
544ca69a RW |
163 | void nb_nodes_create(void) |
164 | { | |
8d869d37 | 165 | yang_snodes_iterate(NULL, nb_node_new_cb, 0, NULL); |
544ca69a RW |
166 | } |
167 | ||
168 | void nb_nodes_delete(void) | |
169 | { | |
8d869d37 | 170 | yang_snodes_iterate(NULL, nb_node_del_cb, 0, NULL); |
544ca69a RW |
171 | } |
172 | ||
1c2facd1 RW |
173 | struct nb_node *nb_node_find(const char *xpath) |
174 | { | |
175 | const struct lys_node *snode; | |
176 | ||
177 | /* | |
178 | * Use libyang to find the schema node associated to the xpath and get | |
179 | * the northbound node from there (snode private pointer). | |
180 | */ | |
181 | snode = ly_ctx_get_node(ly_native_ctx, NULL, xpath, 0); | |
182 | if (!snode) | |
183 | return NULL; | |
184 | ||
185 | return snode->priv; | |
186 | } | |
187 | ||
188 | static int nb_node_validate_cb(const struct nb_node *nb_node, | |
189 | enum nb_operation operation, | |
190 | int callback_implemented, bool optional) | |
191 | { | |
192 | bool valid; | |
193 | ||
194 | valid = nb_operation_is_valid(operation, nb_node->snode); | |
195 | ||
6f4e5edd RW |
196 | /* |
197 | * Add an exception for operational data callbacks. A rw list usually | |
198 | * doesn't need any associated operational data callbacks. But if this | |
199 | * rw list is augmented by another module which adds state nodes under | |
200 | * it, then this list will need to have the 'get_next()', 'get_keys()' | |
201 | * and 'lookup_entry()' callbacks. As such, never log a warning when | |
202 | * these callbacks are implemented when they are not needed, since this | |
203 | * depends on context (e.g. some daemons might augment "frr-interface" | |
204 | * while others don't). | |
205 | */ | |
206 | if (!valid && callback_implemented && operation != NB_OP_GET_NEXT | |
207 | && operation != NB_OP_GET_KEYS && operation != NB_OP_LOOKUP_ENTRY) | |
1c2facd1 RW |
208 | flog_warn(EC_LIB_NB_CB_UNNEEDED, |
209 | "unneeded '%s' callback for '%s'", | |
210 | nb_operation_name(operation), nb_node->xpath); | |
211 | ||
212 | if (!optional && valid && !callback_implemented) { | |
213 | flog_err(EC_LIB_NB_CB_MISSING, "missing '%s' callback for '%s'", | |
214 | nb_operation_name(operation), nb_node->xpath); | |
215 | return 1; | |
216 | } | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Check if the required callbacks were implemented for the given northbound | |
223 | * node. | |
224 | */ | |
225 | static unsigned int nb_node_validate_cbs(const struct nb_node *nb_node) | |
226 | ||
227 | { | |
228 | unsigned int error = 0; | |
229 | ||
230 | error += nb_node_validate_cb(nb_node, NB_OP_CREATE, | |
231 | !!nb_node->cbs.create, false); | |
232 | error += nb_node_validate_cb(nb_node, NB_OP_MODIFY, | |
233 | !!nb_node->cbs.modify, false); | |
95ce849b | 234 | error += nb_node_validate_cb(nb_node, NB_OP_DESTROY, |
d01b92fd | 235 | !!nb_node->cbs.destroy, false); |
1c2facd1 RW |
236 | error += nb_node_validate_cb(nb_node, NB_OP_MOVE, !!nb_node->cbs.move, |
237 | false); | |
34224f0c RW |
238 | error += nb_node_validate_cb(nb_node, NB_OP_PRE_VALIDATE, |
239 | !!nb_node->cbs.pre_validate, true); | |
1c2facd1 RW |
240 | error += nb_node_validate_cb(nb_node, NB_OP_APPLY_FINISH, |
241 | !!nb_node->cbs.apply_finish, true); | |
242 | error += nb_node_validate_cb(nb_node, NB_OP_GET_ELEM, | |
243 | !!nb_node->cbs.get_elem, false); | |
244 | error += nb_node_validate_cb(nb_node, NB_OP_GET_NEXT, | |
245 | !!nb_node->cbs.get_next, false); | |
246 | error += nb_node_validate_cb(nb_node, NB_OP_GET_KEYS, | |
247 | !!nb_node->cbs.get_keys, false); | |
248 | error += nb_node_validate_cb(nb_node, NB_OP_LOOKUP_ENTRY, | |
249 | !!nb_node->cbs.lookup_entry, false); | |
250 | error += nb_node_validate_cb(nb_node, NB_OP_RPC, !!nb_node->cbs.rpc, | |
251 | false); | |
252 | ||
253 | return error; | |
254 | } | |
255 | ||
256 | static unsigned int nb_node_validate_priority(const struct nb_node *nb_node) | |
257 | { | |
258 | /* Top-level nodes can have any priority. */ | |
259 | if (!nb_node->parent) | |
260 | return 0; | |
261 | ||
262 | if (nb_node->priority < nb_node->parent->priority) { | |
263 | flog_err(EC_LIB_NB_CB_INVALID_PRIO, | |
264 | "node has higher priority than its parent [xpath %s]", | |
265 | nb_node->xpath); | |
266 | return 1; | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
e0ccfad2 | 272 | static int nb_node_validate(const struct lys_node *snode, void *arg) |
1c2facd1 RW |
273 | { |
274 | struct nb_node *nb_node = snode->priv; | |
e0ccfad2 | 275 | unsigned int *errors = arg; |
1c2facd1 RW |
276 | |
277 | /* Validate callbacks and priority. */ | |
9bde0b25 RW |
278 | if (nb_node) { |
279 | *errors += nb_node_validate_cbs(nb_node); | |
280 | *errors += nb_node_validate_priority(nb_node); | |
281 | } | |
e0ccfad2 RW |
282 | |
283 | return YANG_ITER_CONTINUE; | |
1c2facd1 RW |
284 | } |
285 | ||
286 | struct nb_config *nb_config_new(struct lyd_node *dnode) | |
287 | { | |
288 | struct nb_config *config; | |
289 | ||
290 | config = XCALLOC(MTYPE_NB_CONFIG, sizeof(*config)); | |
291 | if (dnode) | |
292 | config->dnode = dnode; | |
293 | else | |
5e02643a | 294 | config->dnode = yang_dnode_new(ly_native_ctx, true); |
1c2facd1 RW |
295 | config->version = 0; |
296 | ||
297 | return config; | |
298 | } | |
299 | ||
300 | void nb_config_free(struct nb_config *config) | |
301 | { | |
302 | if (config->dnode) | |
303 | yang_dnode_free(config->dnode); | |
304 | XFREE(MTYPE_NB_CONFIG, config); | |
305 | } | |
306 | ||
307 | struct nb_config *nb_config_dup(const struct nb_config *config) | |
308 | { | |
309 | struct nb_config *dup; | |
310 | ||
311 | dup = XCALLOC(MTYPE_NB_CONFIG, sizeof(*dup)); | |
312 | dup->dnode = yang_dnode_dup(config->dnode); | |
313 | dup->version = config->version; | |
314 | ||
315 | return dup; | |
316 | } | |
317 | ||
318 | int nb_config_merge(struct nb_config *config_dst, struct nb_config *config_src, | |
319 | bool preserve_source) | |
320 | { | |
321 | int ret; | |
322 | ||
323 | ret = lyd_merge(config_dst->dnode, config_src->dnode, LYD_OPT_EXPLICIT); | |
324 | if (ret != 0) | |
325 | flog_warn(EC_LIB_LIBYANG, "%s: lyd_merge() failed", __func__); | |
326 | ||
327 | if (!preserve_source) | |
328 | nb_config_free(config_src); | |
329 | ||
330 | return (ret == 0) ? NB_OK : NB_ERR; | |
331 | } | |
332 | ||
333 | void nb_config_replace(struct nb_config *config_dst, | |
334 | struct nb_config *config_src, bool preserve_source) | |
335 | { | |
336 | /* Update version. */ | |
337 | if (config_src->version != 0) | |
338 | config_dst->version = config_src->version; | |
339 | ||
340 | /* Update dnode. */ | |
e5dc8a44 RW |
341 | if (config_dst->dnode) |
342 | yang_dnode_free(config_dst->dnode); | |
1c2facd1 RW |
343 | if (preserve_source) { |
344 | config_dst->dnode = yang_dnode_dup(config_src->dnode); | |
345 | } else { | |
346 | config_dst->dnode = config_src->dnode; | |
347 | config_src->dnode = NULL; | |
348 | nb_config_free(config_src); | |
349 | } | |
350 | } | |
351 | ||
352 | /* Generate the nb_config_cbs tree. */ | |
353 | static inline int nb_config_cb_compare(const struct nb_config_cb *a, | |
354 | const struct nb_config_cb *b) | |
355 | { | |
356 | /* Sort by priority first. */ | |
357 | if (a->nb_node->priority < b->nb_node->priority) | |
358 | return -1; | |
359 | if (a->nb_node->priority > b->nb_node->priority) | |
360 | return 1; | |
361 | ||
362 | /* | |
6b5d6e2d | 363 | * Preserve the order of the configuration changes as told by libyang. |
1c2facd1 | 364 | */ |
fe3f2c61 RW |
365 | if (a->seq < b->seq) |
366 | return -1; | |
367 | if (a->seq > b->seq) | |
368 | return 1; | |
369 | ||
370 | /* | |
371 | * All 'apply_finish' callbacks have their sequence number set to zero. | |
372 | * In this case, compare them using their dnode pointers (the order | |
373 | * doesn't matter for callbacks that have the same priority). | |
374 | */ | |
375 | if (a->dnode < b->dnode) | |
376 | return -1; | |
377 | if (a->dnode > b->dnode) | |
378 | return 1; | |
379 | ||
380 | return 0; | |
1c2facd1 RW |
381 | } |
382 | RB_GENERATE(nb_config_cbs, nb_config_cb, entry, nb_config_cb_compare); | |
383 | ||
384 | static void nb_config_diff_add_change(struct nb_config_cbs *changes, | |
385 | enum nb_operation operation, | |
6b5d6e2d | 386 | uint32_t *seq, |
1c2facd1 RW |
387 | const struct lyd_node *dnode) |
388 | { | |
389 | struct nb_config_change *change; | |
390 | ||
f267201b RW |
391 | /* Ignore unimplemented nodes. */ |
392 | if (!dnode->schema->priv) | |
393 | return; | |
394 | ||
1c2facd1 RW |
395 | change = XCALLOC(MTYPE_TMP, sizeof(*change)); |
396 | change->cb.operation = operation; | |
6b5d6e2d RW |
397 | change->cb.seq = *seq; |
398 | *seq = *seq + 1; | |
1c2facd1 | 399 | change->cb.nb_node = dnode->schema->priv; |
1c2facd1 RW |
400 | change->cb.dnode = dnode; |
401 | ||
402 | RB_INSERT(nb_config_cbs, changes, &change->cb); | |
403 | } | |
404 | ||
405 | static void nb_config_diff_del_changes(struct nb_config_cbs *changes) | |
406 | { | |
407 | while (!RB_EMPTY(nb_config_cbs, changes)) { | |
408 | struct nb_config_change *change; | |
409 | ||
410 | change = (struct nb_config_change *)RB_ROOT(nb_config_cbs, | |
411 | changes); | |
412 | RB_REMOVE(nb_config_cbs, changes, &change->cb); | |
413 | XFREE(MTYPE_TMP, change); | |
414 | } | |
415 | } | |
416 | ||
417 | /* | |
418 | * Helper function used when calculating the delta between two different | |
419 | * configurations. Given a new subtree, calculate all new YANG data nodes, | |
420 | * excluding default leafs and leaf-lists. This is a recursive function. | |
421 | */ | |
6b5d6e2d | 422 | static void nb_config_diff_created(const struct lyd_node *dnode, uint32_t *seq, |
cacbffaf | 423 | struct nb_config_cbs *changes) |
1c2facd1 | 424 | { |
cacbffaf | 425 | enum nb_operation operation; |
1c2facd1 RW |
426 | struct lyd_node *child; |
427 | ||
f267201b RW |
428 | /* Ignore unimplemented nodes. */ |
429 | if (!dnode->schema->priv) | |
430 | return; | |
431 | ||
cacbffaf RW |
432 | switch (dnode->schema->nodetype) { |
433 | case LYS_LEAF: | |
434 | case LYS_LEAFLIST: | |
435 | if (lyd_wd_default((struct lyd_node_leaf_list *)dnode)) | |
436 | break; | |
1c2facd1 | 437 | |
cacbffaf RW |
438 | if (nb_operation_is_valid(NB_OP_CREATE, dnode->schema)) |
439 | operation = NB_OP_CREATE; | |
440 | else if (nb_operation_is_valid(NB_OP_MODIFY, dnode->schema)) | |
441 | operation = NB_OP_MODIFY; | |
442 | else | |
443 | return; | |
1c2facd1 | 444 | |
6b5d6e2d | 445 | nb_config_diff_add_change(changes, operation, seq, dnode); |
cacbffaf RW |
446 | break; |
447 | case LYS_CONTAINER: | |
448 | case LYS_LIST: | |
449 | if (nb_operation_is_valid(NB_OP_CREATE, dnode->schema)) | |
6b5d6e2d RW |
450 | nb_config_diff_add_change(changes, NB_OP_CREATE, seq, |
451 | dnode); | |
cacbffaf RW |
452 | |
453 | /* Process child nodes recursively. */ | |
454 | LY_TREE_FOR (dnode->child, child) { | |
6b5d6e2d | 455 | nb_config_diff_created(child, seq, changes); |
1c2facd1 | 456 | } |
cacbffaf RW |
457 | break; |
458 | default: | |
459 | break; | |
1c2facd1 RW |
460 | } |
461 | } | |
462 | ||
6b5d6e2d | 463 | static void nb_config_diff_deleted(const struct lyd_node *dnode, uint32_t *seq, |
1912caa2 RW |
464 | struct nb_config_cbs *changes) |
465 | { | |
f267201b RW |
466 | /* Ignore unimplemented nodes. */ |
467 | if (!dnode->schema->priv) | |
468 | return; | |
469 | ||
1912caa2 | 470 | if (nb_operation_is_valid(NB_OP_DESTROY, dnode->schema)) |
6b5d6e2d | 471 | nb_config_diff_add_change(changes, NB_OP_DESTROY, seq, dnode); |
1912caa2 RW |
472 | else if (CHECK_FLAG(dnode->schema->nodetype, LYS_CONTAINER)) { |
473 | struct lyd_node *child; | |
474 | ||
475 | /* | |
476 | * Non-presence containers need special handling since they | |
477 | * don't have "destroy" callbacks. In this case, what we need to | |
478 | * do is to call the "destroy" callbacks of their child nodes | |
479 | * when applicable (i.e. optional nodes). | |
480 | */ | |
481 | LY_TREE_FOR (dnode->child, child) { | |
6b5d6e2d | 482 | nb_config_diff_deleted(child, seq, changes); |
1912caa2 RW |
483 | } |
484 | } | |
485 | } | |
486 | ||
1c2facd1 RW |
487 | /* Calculate the delta between two different configurations. */ |
488 | static void nb_config_diff(const struct nb_config *config1, | |
489 | const struct nb_config *config2, | |
490 | struct nb_config_cbs *changes) | |
491 | { | |
492 | struct lyd_difflist *diff; | |
6b5d6e2d | 493 | uint32_t seq = 0; |
1c2facd1 RW |
494 | |
495 | diff = lyd_diff(config1->dnode, config2->dnode, | |
496 | LYD_DIFFOPT_WITHDEFAULTS); | |
497 | assert(diff); | |
498 | ||
499 | for (int i = 0; diff->type[i] != LYD_DIFF_END; i++) { | |
500 | LYD_DIFFTYPE type; | |
501 | struct lyd_node *dnode; | |
1c2facd1 RW |
502 | |
503 | type = diff->type[i]; | |
504 | ||
505 | switch (type) { | |
506 | case LYD_DIFF_CREATED: | |
507 | dnode = diff->second[i]; | |
6b5d6e2d | 508 | nb_config_diff_created(dnode, &seq, changes); |
1c2facd1 RW |
509 | break; |
510 | case LYD_DIFF_DELETED: | |
511 | dnode = diff->first[i]; | |
6b5d6e2d | 512 | nb_config_diff_deleted(dnode, &seq, changes); |
1c2facd1 RW |
513 | break; |
514 | case LYD_DIFF_CHANGED: | |
515 | dnode = diff->second[i]; | |
6b5d6e2d RW |
516 | nb_config_diff_add_change(changes, NB_OP_MODIFY, &seq, |
517 | dnode); | |
1c2facd1 RW |
518 | break; |
519 | case LYD_DIFF_MOVEDAFTER1: | |
520 | case LYD_DIFF_MOVEDAFTER2: | |
521 | default: | |
522 | continue; | |
523 | } | |
1c2facd1 RW |
524 | } |
525 | ||
526 | lyd_free_diff(diff); | |
527 | } | |
528 | ||
529 | int nb_candidate_edit(struct nb_config *candidate, | |
530 | const struct nb_node *nb_node, | |
531 | enum nb_operation operation, const char *xpath, | |
532 | const struct yang_data *previous, | |
533 | const struct yang_data *data) | |
534 | { | |
535 | struct lyd_node *dnode; | |
536 | char xpath_edit[XPATH_MAXLEN]; | |
537 | ||
1c2facd1 RW |
538 | /* Use special notation for leaf-lists (RFC 6020, section 9.13.5). */ |
539 | if (nb_node->snode->nodetype == LYS_LEAFLIST) | |
540 | snprintf(xpath_edit, sizeof(xpath_edit), "%s[.='%s']", xpath, | |
541 | data->value); | |
542 | else | |
543 | strlcpy(xpath_edit, xpath, sizeof(xpath_edit)); | |
544 | ||
545 | switch (operation) { | |
546 | case NB_OP_CREATE: | |
547 | case NB_OP_MODIFY: | |
548 | ly_errno = 0; | |
549 | dnode = lyd_new_path(candidate->dnode, ly_native_ctx, | |
550 | xpath_edit, (void *)data->value, 0, | |
551 | LYD_PATH_OPT_UPDATE); | |
552 | if (!dnode && ly_errno) { | |
553 | flog_warn(EC_LIB_LIBYANG, "%s: lyd_new_path() failed", | |
554 | __func__); | |
555 | return NB_ERR; | |
556 | } | |
1c2facd1 | 557 | break; |
95ce849b | 558 | case NB_OP_DESTROY: |
1c2facd1 RW |
559 | dnode = yang_dnode_get(candidate->dnode, xpath_edit); |
560 | if (!dnode) | |
561 | /* | |
562 | * Return a special error code so the caller can choose | |
563 | * whether to ignore it or not. | |
564 | */ | |
565 | return NB_ERR_NOT_FOUND; | |
566 | lyd_free(dnode); | |
567 | break; | |
568 | case NB_OP_MOVE: | |
569 | /* TODO: update configuration. */ | |
570 | break; | |
571 | default: | |
572 | flog_warn(EC_LIB_DEVELOPMENT, | |
573 | "%s: unknown operation (%u) [xpath %s]", __func__, | |
574 | operation, xpath_edit); | |
575 | return NB_ERR; | |
576 | } | |
577 | ||
578 | return NB_OK; | |
579 | } | |
580 | ||
581 | bool nb_candidate_needs_update(const struct nb_config *candidate) | |
582 | { | |
8685be73 RW |
583 | if (candidate->version < running_config->version) |
584 | return true; | |
1c2facd1 | 585 | |
8685be73 | 586 | return false; |
1c2facd1 RW |
587 | } |
588 | ||
589 | int nb_candidate_update(struct nb_config *candidate) | |
590 | { | |
591 | struct nb_config *updated_config; | |
592 | ||
8685be73 | 593 | updated_config = nb_config_dup(running_config); |
1c2facd1 RW |
594 | if (nb_config_merge(updated_config, candidate, true) != NB_OK) |
595 | return NB_ERR; | |
596 | ||
597 | nb_config_replace(candidate, updated_config, false); | |
598 | ||
599 | return NB_OK; | |
600 | } | |
601 | ||
1c2facd1 RW |
602 | /* |
603 | * Perform YANG syntactic and semantic validation. | |
604 | * | |
605 | * WARNING: lyd_validate() can change the configuration as part of the | |
606 | * validation process. | |
607 | */ | |
df5eda3d RW |
608 | static int nb_candidate_validate_yang(struct nb_config *candidate, char *errmsg, |
609 | size_t errmsg_len) | |
1c2facd1 | 610 | { |
cd327983 RW |
611 | if (lyd_validate(&candidate->dnode, |
612 | LYD_OPT_STRICT | LYD_OPT_CONFIG | LYD_OPT_WHENAUTODEL, | |
1c2facd1 | 613 | ly_native_ctx) |
df5eda3d RW |
614 | != 0) { |
615 | yang_print_errors(ly_native_ctx, errmsg, errmsg_len); | |
1c2facd1 | 616 | return NB_ERR_VALIDATION; |
df5eda3d | 617 | } |
1c2facd1 RW |
618 | |
619 | return NB_OK; | |
620 | } | |
621 | ||
622 | /* Perform code-level validation using the northbound callbacks. */ | |
13d6b9c1 RW |
623 | static int nb_candidate_validate_code(struct nb_context *context, |
624 | struct nb_config *candidate, | |
df5eda3d RW |
625 | struct nb_config_cbs *changes, |
626 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
627 | { |
628 | struct nb_config_cb *cb; | |
34224f0c RW |
629 | struct lyd_node *root, *next, *child; |
630 | int ret; | |
631 | ||
632 | /* First validate the candidate as a whole. */ | |
633 | LY_TREE_FOR (candidate->dnode, root) { | |
634 | LY_TREE_DFS_BEGIN (root, next, child) { | |
635 | struct nb_node *nb_node; | |
636 | ||
637 | nb_node = child->schema->priv; | |
f267201b | 638 | if (!nb_node || !nb_node->cbs.pre_validate) |
34224f0c RW |
639 | goto next; |
640 | ||
df5eda3d RW |
641 | ret = nb_callback_pre_validate(context, nb_node, child, |
642 | errmsg, errmsg_len); | |
34224f0c RW |
643 | if (ret != NB_OK) |
644 | return NB_ERR_VALIDATION; | |
645 | ||
646 | next: | |
647 | LY_TREE_DFS_END(root, next, child); | |
648 | } | |
649 | } | |
650 | ||
651 | /* Now validate the configuration changes. */ | |
1c2facd1 RW |
652 | RB_FOREACH (cb, nb_config_cbs, changes) { |
653 | struct nb_config_change *change = (struct nb_config_change *)cb; | |
1c2facd1 | 654 | |
df5eda3d RW |
655 | ret = nb_callback_configuration(context, NB_EV_VALIDATE, change, |
656 | errmsg, errmsg_len); | |
1c2facd1 RW |
657 | if (ret != NB_OK) |
658 | return NB_ERR_VALIDATION; | |
659 | } | |
660 | ||
661 | return NB_OK; | |
662 | } | |
663 | ||
13d6b9c1 | 664 | int nb_candidate_validate(struct nb_context *context, |
df5eda3d RW |
665 | struct nb_config *candidate, char *errmsg, |
666 | size_t errmsg_len) | |
1c2facd1 RW |
667 | { |
668 | struct nb_config_cbs changes; | |
669 | int ret; | |
670 | ||
df5eda3d RW |
671 | if (nb_candidate_validate_yang(candidate, errmsg, sizeof(errmsg_len)) |
672 | != NB_OK) | |
1c2facd1 RW |
673 | return NB_ERR_VALIDATION; |
674 | ||
675 | RB_INIT(nb_config_cbs, &changes); | |
8685be73 | 676 | nb_config_diff(running_config, candidate, &changes); |
df5eda3d RW |
677 | ret = nb_candidate_validate_code(context, candidate, &changes, errmsg, |
678 | errmsg_len); | |
8685be73 | 679 | nb_config_diff_del_changes(&changes); |
1c2facd1 RW |
680 | |
681 | return ret; | |
682 | } | |
683 | ||
13d6b9c1 RW |
684 | int nb_candidate_commit_prepare(struct nb_context *context, |
685 | struct nb_config *candidate, | |
364ad673 | 686 | const char *comment, |
df5eda3d RW |
687 | struct nb_transaction **transaction, |
688 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
689 | { |
690 | struct nb_config_cbs changes; | |
691 | ||
df5eda3d RW |
692 | if (nb_candidate_validate_yang(candidate, errmsg, errmsg_len) |
693 | != NB_OK) { | |
1c2facd1 RW |
694 | flog_warn(EC_LIB_NB_CANDIDATE_INVALID, |
695 | "%s: failed to validate candidate configuration", | |
696 | __func__); | |
697 | return NB_ERR_VALIDATION; | |
698 | } | |
699 | ||
700 | RB_INIT(nb_config_cbs, &changes); | |
8685be73 | 701 | nb_config_diff(running_config, candidate, &changes); |
5bfb669b QY |
702 | if (RB_EMPTY(nb_config_cbs, &changes)) { |
703 | snprintf( | |
704 | errmsg, errmsg_len, | |
705 | "No changes to apply were found during preparation phase"); | |
8685be73 | 706 | return NB_ERR_NO_CHANGES; |
5bfb669b | 707 | } |
1c2facd1 | 708 | |
df5eda3d RW |
709 | if (nb_candidate_validate_code(context, candidate, &changes, errmsg, |
710 | errmsg_len) | |
711 | != NB_OK) { | |
8685be73 RW |
712 | flog_warn(EC_LIB_NB_CANDIDATE_INVALID, |
713 | "%s: failed to validate candidate configuration", | |
714 | __func__); | |
715 | nb_config_diff_del_changes(&changes); | |
716 | return NB_ERR_VALIDATION; | |
717 | } | |
1c2facd1 | 718 | |
df5eda3d RW |
719 | *transaction = nb_transaction_new(context, candidate, &changes, comment, |
720 | errmsg, errmsg_len); | |
8685be73 RW |
721 | if (*transaction == NULL) { |
722 | flog_warn(EC_LIB_NB_TRANSACTION_CREATION_FAILED, | |
df5eda3d RW |
723 | "%s: failed to create transaction: %s", __func__, |
724 | errmsg); | |
8685be73 RW |
725 | nb_config_diff_del_changes(&changes); |
726 | return NB_ERR_LOCKED; | |
1c2facd1 RW |
727 | } |
728 | ||
df5eda3d RW |
729 | return nb_transaction_process(NB_EV_PREPARE, *transaction, errmsg, |
730 | errmsg_len); | |
1c2facd1 RW |
731 | } |
732 | ||
0fe5b904 RW |
733 | void nb_candidate_commit_abort(struct nb_transaction *transaction, char *errmsg, |
734 | size_t errmsg_len) | |
1c2facd1 | 735 | { |
df5eda3d | 736 | (void)nb_transaction_process(NB_EV_ABORT, transaction, errmsg, |
0fe5b904 | 737 | errmsg_len); |
1c2facd1 RW |
738 | nb_transaction_free(transaction); |
739 | } | |
740 | ||
741 | void nb_candidate_commit_apply(struct nb_transaction *transaction, | |
0fe5b904 RW |
742 | bool save_transaction, uint32_t *transaction_id, |
743 | char *errmsg, size_t errmsg_len) | |
1c2facd1 | 744 | { |
df5eda3d | 745 | (void)nb_transaction_process(NB_EV_APPLY, transaction, errmsg, |
0fe5b904 RW |
746 | errmsg_len); |
747 | nb_transaction_apply_finish(transaction, errmsg, errmsg_len); | |
1c2facd1 RW |
748 | |
749 | /* Replace running by candidate. */ | |
750 | transaction->config->version++; | |
8685be73 | 751 | nb_config_replace(running_config, transaction->config, true); |
1c2facd1 RW |
752 | |
753 | /* Record transaction. */ | |
390a8862 | 754 | if (save_transaction && nb_db_enabled |
1c2facd1 RW |
755 | && nb_db_transaction_save(transaction, transaction_id) != NB_OK) |
756 | flog_warn(EC_LIB_NB_TRANSACTION_RECORD_FAILED, | |
757 | "%s: failed to record transaction", __func__); | |
758 | ||
759 | nb_transaction_free(transaction); | |
760 | } | |
761 | ||
13d6b9c1 RW |
762 | int nb_candidate_commit(struct nb_context *context, struct nb_config *candidate, |
763 | bool save_transaction, const char *comment, | |
df5eda3d RW |
764 | uint32_t *transaction_id, char *errmsg, |
765 | size_t errmsg_len) | |
1c2facd1 RW |
766 | { |
767 | struct nb_transaction *transaction = NULL; | |
768 | int ret; | |
769 | ||
13d6b9c1 | 770 | ret = nb_candidate_commit_prepare(context, candidate, comment, |
df5eda3d | 771 | &transaction, errmsg, errmsg_len); |
1c2facd1 RW |
772 | /* |
773 | * Apply the changes if the preparation phase succeeded. Otherwise abort | |
774 | * the transaction. | |
775 | */ | |
776 | if (ret == NB_OK) | |
777 | nb_candidate_commit_apply(transaction, save_transaction, | |
0fe5b904 | 778 | transaction_id, errmsg, errmsg_len); |
1c2facd1 | 779 | else if (transaction != NULL) |
0fe5b904 | 780 | nb_candidate_commit_abort(transaction, errmsg, errmsg_len); |
1c2facd1 RW |
781 | |
782 | return ret; | |
783 | } | |
784 | ||
364ad673 RW |
785 | int nb_running_lock(enum nb_client client, const void *user) |
786 | { | |
787 | int ret = -1; | |
788 | ||
1be4decb | 789 | frr_with_mutex (&running_config_mgmt_lock.mtx) { |
364ad673 RW |
790 | if (!running_config_mgmt_lock.locked) { |
791 | running_config_mgmt_lock.locked = true; | |
792 | running_config_mgmt_lock.owner_client = client; | |
793 | running_config_mgmt_lock.owner_user = user; | |
794 | ret = 0; | |
795 | } | |
796 | } | |
364ad673 RW |
797 | |
798 | return ret; | |
799 | } | |
800 | ||
801 | int nb_running_unlock(enum nb_client client, const void *user) | |
802 | { | |
803 | int ret = -1; | |
804 | ||
1be4decb | 805 | frr_with_mutex (&running_config_mgmt_lock.mtx) { |
364ad673 RW |
806 | if (running_config_mgmt_lock.locked |
807 | && running_config_mgmt_lock.owner_client == client | |
808 | && running_config_mgmt_lock.owner_user == user) { | |
809 | running_config_mgmt_lock.locked = false; | |
810 | running_config_mgmt_lock.owner_client = NB_CLIENT_NONE; | |
811 | running_config_mgmt_lock.owner_user = NULL; | |
812 | ret = 0; | |
813 | } | |
814 | } | |
364ad673 RW |
815 | |
816 | return ret; | |
817 | } | |
818 | ||
819 | int nb_running_lock_check(enum nb_client client, const void *user) | |
820 | { | |
821 | int ret = -1; | |
822 | ||
1be4decb | 823 | frr_with_mutex (&running_config_mgmt_lock.mtx) { |
364ad673 RW |
824 | if (!running_config_mgmt_lock.locked |
825 | || (running_config_mgmt_lock.owner_client == client | |
826 | && running_config_mgmt_lock.owner_user == user)) | |
827 | ret = 0; | |
828 | } | |
364ad673 RW |
829 | |
830 | return ret; | |
831 | } | |
832 | ||
97cd8493 RW |
833 | static void nb_log_config_callback(const enum nb_event event, |
834 | enum nb_operation operation, | |
835 | const struct lyd_node *dnode) | |
1c2facd1 | 836 | { |
97cd8493 RW |
837 | const char *value; |
838 | char xpath[XPATH_MAXLEN]; | |
839 | ||
840 | if (!DEBUG_MODE_CHECK(&nb_dbg_cbs_config, DEBUG_MODE_ALL)) | |
841 | return; | |
842 | ||
843 | yang_dnode_get_path(dnode, xpath, sizeof(xpath)); | |
844 | if (yang_snode_is_typeless_data(dnode->schema)) | |
845 | value = "(none)"; | |
846 | else | |
847 | value = yang_dnode_get_string(dnode, NULL); | |
848 | ||
1c2facd1 RW |
849 | zlog_debug( |
850 | "northbound callback: event [%s] op [%s] xpath [%s] value [%s]", | |
851 | nb_event_name(event), nb_operation_name(operation), xpath, | |
97cd8493 RW |
852 | value); |
853 | } | |
854 | ||
13d6b9c1 RW |
855 | static int nb_callback_create(struct nb_context *context, |
856 | const struct nb_node *nb_node, | |
97cd8493 | 857 | enum nb_event event, const struct lyd_node *dnode, |
df5eda3d RW |
858 | union nb_resource *resource, char *errmsg, |
859 | size_t errmsg_len) | |
97cd8493 | 860 | { |
60ee8be1 | 861 | struct nb_cb_create_args args = {}; |
1abe6c53 RW |
862 | bool unexpected_error = false; |
863 | int ret; | |
60ee8be1 | 864 | |
97cd8493 RW |
865 | nb_log_config_callback(event, NB_OP_CREATE, dnode); |
866 | ||
13d6b9c1 | 867 | args.context = context; |
60ee8be1 RW |
868 | args.event = event; |
869 | args.dnode = dnode; | |
870 | args.resource = resource; | |
df5eda3d RW |
871 | args.errmsg = errmsg; |
872 | args.errmsg_len = errmsg_len; | |
1abe6c53 RW |
873 | ret = nb_node->cbs.create(&args); |
874 | ||
875 | /* Detect and log unexpected errors. */ | |
876 | switch (ret) { | |
877 | case NB_OK: | |
878 | case NB_ERR: | |
879 | break; | |
880 | case NB_ERR_VALIDATION: | |
881 | if (event != NB_EV_VALIDATE) | |
882 | unexpected_error = true; | |
883 | break; | |
884 | case NB_ERR_RESOURCE: | |
885 | if (event != NB_EV_PREPARE) | |
886 | unexpected_error = true; | |
887 | break; | |
888 | case NB_ERR_INCONSISTENCY: | |
889 | if (event == NB_EV_VALIDATE) | |
890 | unexpected_error = true; | |
891 | break; | |
892 | default: | |
893 | unexpected_error = true; | |
894 | break; | |
895 | } | |
896 | if (unexpected_error) | |
897 | DEBUGD(&nb_dbg_cbs_config, | |
898 | "northbound callback: unexpected return value: %s", | |
899 | nb_err_name(ret)); | |
900 | ||
901 | return ret; | |
97cd8493 RW |
902 | } |
903 | ||
13d6b9c1 RW |
904 | static int nb_callback_modify(struct nb_context *context, |
905 | const struct nb_node *nb_node, | |
97cd8493 | 906 | enum nb_event event, const struct lyd_node *dnode, |
df5eda3d RW |
907 | union nb_resource *resource, char *errmsg, |
908 | size_t errmsg_len) | |
97cd8493 | 909 | { |
60ee8be1 | 910 | struct nb_cb_modify_args args = {}; |
1abe6c53 RW |
911 | bool unexpected_error = false; |
912 | int ret; | |
60ee8be1 | 913 | |
97cd8493 RW |
914 | nb_log_config_callback(event, NB_OP_MODIFY, dnode); |
915 | ||
13d6b9c1 | 916 | args.context = context; |
60ee8be1 RW |
917 | args.event = event; |
918 | args.dnode = dnode; | |
919 | args.resource = resource; | |
df5eda3d RW |
920 | args.errmsg = errmsg; |
921 | args.errmsg_len = errmsg_len; | |
1abe6c53 RW |
922 | ret = nb_node->cbs.modify(&args); |
923 | ||
924 | /* Detect and log unexpected errors. */ | |
925 | switch (ret) { | |
926 | case NB_OK: | |
927 | case NB_ERR: | |
928 | break; | |
929 | case NB_ERR_VALIDATION: | |
930 | if (event != NB_EV_VALIDATE) | |
931 | unexpected_error = true; | |
932 | break; | |
933 | case NB_ERR_RESOURCE: | |
934 | if (event != NB_EV_PREPARE) | |
935 | unexpected_error = true; | |
936 | break; | |
937 | case NB_ERR_INCONSISTENCY: | |
938 | if (event == NB_EV_VALIDATE) | |
939 | unexpected_error = true; | |
940 | break; | |
941 | default: | |
942 | unexpected_error = true; | |
943 | break; | |
944 | } | |
945 | if (unexpected_error) | |
946 | DEBUGD(&nb_dbg_cbs_config, | |
947 | "northbound callback: unexpected return value: %s", | |
948 | nb_err_name(ret)); | |
949 | ||
950 | return ret; | |
97cd8493 RW |
951 | } |
952 | ||
13d6b9c1 RW |
953 | static int nb_callback_destroy(struct nb_context *context, |
954 | const struct nb_node *nb_node, | |
97cd8493 | 955 | enum nb_event event, |
df5eda3d RW |
956 | const struct lyd_node *dnode, char *errmsg, |
957 | size_t errmsg_len) | |
97cd8493 | 958 | { |
60ee8be1 | 959 | struct nb_cb_destroy_args args = {}; |
1abe6c53 RW |
960 | bool unexpected_error = false; |
961 | int ret; | |
60ee8be1 | 962 | |
97cd8493 RW |
963 | nb_log_config_callback(event, NB_OP_DESTROY, dnode); |
964 | ||
13d6b9c1 | 965 | args.context = context; |
60ee8be1 RW |
966 | args.event = event; |
967 | args.dnode = dnode; | |
df5eda3d RW |
968 | args.errmsg = errmsg; |
969 | args.errmsg_len = errmsg_len; | |
1abe6c53 RW |
970 | ret = nb_node->cbs.destroy(&args); |
971 | ||
972 | /* Detect and log unexpected errors. */ | |
973 | switch (ret) { | |
974 | case NB_OK: | |
975 | case NB_ERR: | |
976 | break; | |
977 | case NB_ERR_VALIDATION: | |
978 | if (event != NB_EV_VALIDATE) | |
979 | unexpected_error = true; | |
980 | break; | |
981 | case NB_ERR_INCONSISTENCY: | |
982 | if (event == NB_EV_VALIDATE) | |
983 | unexpected_error = true; | |
984 | break; | |
985 | default: | |
986 | unexpected_error = true; | |
987 | break; | |
988 | } | |
989 | if (unexpected_error) | |
990 | DEBUGD(&nb_dbg_cbs_config, | |
991 | "northbound callback: unexpected return value: %s", | |
992 | nb_err_name(ret)); | |
993 | ||
994 | return ret; | |
97cd8493 RW |
995 | } |
996 | ||
13d6b9c1 RW |
997 | static int nb_callback_move(struct nb_context *context, |
998 | const struct nb_node *nb_node, enum nb_event event, | |
df5eda3d RW |
999 | const struct lyd_node *dnode, char *errmsg, |
1000 | size_t errmsg_len) | |
97cd8493 | 1001 | { |
60ee8be1 | 1002 | struct nb_cb_move_args args = {}; |
1abe6c53 RW |
1003 | bool unexpected_error = false; |
1004 | int ret; | |
60ee8be1 | 1005 | |
97cd8493 RW |
1006 | nb_log_config_callback(event, NB_OP_MOVE, dnode); |
1007 | ||
13d6b9c1 | 1008 | args.context = context; |
60ee8be1 RW |
1009 | args.event = event; |
1010 | args.dnode = dnode; | |
df5eda3d RW |
1011 | args.errmsg = errmsg; |
1012 | args.errmsg_len = errmsg_len; | |
1abe6c53 RW |
1013 | ret = nb_node->cbs.move(&args); |
1014 | ||
1015 | /* Detect and log unexpected errors. */ | |
1016 | switch (ret) { | |
1017 | case NB_OK: | |
1018 | case NB_ERR: | |
1019 | break; | |
1020 | case NB_ERR_VALIDATION: | |
1021 | if (event != NB_EV_VALIDATE) | |
1022 | unexpected_error = true; | |
1023 | break; | |
1024 | case NB_ERR_INCONSISTENCY: | |
1025 | if (event == NB_EV_VALIDATE) | |
1026 | unexpected_error = true; | |
1027 | break; | |
1028 | default: | |
1029 | unexpected_error = true; | |
1030 | break; | |
1031 | } | |
1032 | if (unexpected_error) | |
1033 | DEBUGD(&nb_dbg_cbs_config, | |
1034 | "northbound callback: unexpected return value: %s", | |
1035 | nb_err_name(ret)); | |
1036 | ||
1037 | return ret; | |
97cd8493 RW |
1038 | } |
1039 | ||
13d6b9c1 RW |
1040 | static int nb_callback_pre_validate(struct nb_context *context, |
1041 | const struct nb_node *nb_node, | |
df5eda3d RW |
1042 | const struct lyd_node *dnode, char *errmsg, |
1043 | size_t errmsg_len) | |
97cd8493 | 1044 | { |
60ee8be1 | 1045 | struct nb_cb_pre_validate_args args = {}; |
1abe6c53 RW |
1046 | bool unexpected_error = false; |
1047 | int ret; | |
60ee8be1 | 1048 | |
97cd8493 RW |
1049 | nb_log_config_callback(NB_EV_VALIDATE, NB_OP_PRE_VALIDATE, dnode); |
1050 | ||
60ee8be1 | 1051 | args.dnode = dnode; |
df5eda3d RW |
1052 | args.errmsg = errmsg; |
1053 | args.errmsg_len = errmsg_len; | |
1abe6c53 RW |
1054 | ret = nb_node->cbs.pre_validate(&args); |
1055 | ||
1056 | /* Detect and log unexpected errors. */ | |
1057 | switch (ret) { | |
1058 | case NB_OK: | |
1059 | case NB_ERR_VALIDATION: | |
1060 | break; | |
1061 | default: | |
1062 | unexpected_error = true; | |
1063 | break; | |
1064 | } | |
1065 | if (unexpected_error) | |
1066 | DEBUGD(&nb_dbg_cbs_config, | |
1067 | "northbound callback: unexpected return value: %s", | |
1068 | nb_err_name(ret)); | |
1069 | ||
1070 | return ret; | |
97cd8493 RW |
1071 | } |
1072 | ||
13d6b9c1 RW |
1073 | static void nb_callback_apply_finish(struct nb_context *context, |
1074 | const struct nb_node *nb_node, | |
df5eda3d RW |
1075 | const struct lyd_node *dnode, char *errmsg, |
1076 | size_t errmsg_len) | |
97cd8493 | 1077 | { |
60ee8be1 RW |
1078 | struct nb_cb_apply_finish_args args = {}; |
1079 | ||
97cd8493 RW |
1080 | nb_log_config_callback(NB_EV_APPLY, NB_OP_APPLY_FINISH, dnode); |
1081 | ||
13d6b9c1 | 1082 | args.context = context; |
60ee8be1 | 1083 | args.dnode = dnode; |
df5eda3d RW |
1084 | args.errmsg = errmsg; |
1085 | args.errmsg_len = errmsg_len; | |
60ee8be1 | 1086 | nb_node->cbs.apply_finish(&args); |
97cd8493 RW |
1087 | } |
1088 | ||
1089 | struct yang_data *nb_callback_get_elem(const struct nb_node *nb_node, | |
1090 | const char *xpath, | |
1091 | const void *list_entry) | |
1092 | { | |
60ee8be1 RW |
1093 | struct nb_cb_get_elem_args args = {}; |
1094 | ||
97cd8493 RW |
1095 | DEBUGD(&nb_dbg_cbs_state, |
1096 | "northbound callback (get_elem): xpath [%s] list_entry [%p]", | |
1097 | xpath, list_entry); | |
1098 | ||
60ee8be1 RW |
1099 | args.xpath = xpath; |
1100 | args.list_entry = list_entry; | |
1101 | return nb_node->cbs.get_elem(&args); | |
97cd8493 RW |
1102 | } |
1103 | ||
1104 | const void *nb_callback_get_next(const struct nb_node *nb_node, | |
1105 | const void *parent_list_entry, | |
1106 | const void *list_entry) | |
1107 | { | |
60ee8be1 RW |
1108 | struct nb_cb_get_next_args args = {}; |
1109 | ||
97cd8493 RW |
1110 | DEBUGD(&nb_dbg_cbs_state, |
1111 | "northbound callback (get_next): node [%s] parent_list_entry [%p] list_entry [%p]", | |
1112 | nb_node->xpath, parent_list_entry, list_entry); | |
1113 | ||
60ee8be1 RW |
1114 | args.parent_list_entry = parent_list_entry; |
1115 | args.list_entry = list_entry; | |
1116 | return nb_node->cbs.get_next(&args); | |
97cd8493 RW |
1117 | } |
1118 | ||
1119 | int nb_callback_get_keys(const struct nb_node *nb_node, const void *list_entry, | |
1120 | struct yang_list_keys *keys) | |
1121 | { | |
60ee8be1 RW |
1122 | struct nb_cb_get_keys_args args = {}; |
1123 | ||
97cd8493 RW |
1124 | DEBUGD(&nb_dbg_cbs_state, |
1125 | "northbound callback (get_keys): node [%s] list_entry [%p]", | |
1126 | nb_node->xpath, list_entry); | |
1127 | ||
60ee8be1 RW |
1128 | args.list_entry = list_entry; |
1129 | args.keys = keys; | |
1130 | return nb_node->cbs.get_keys(&args); | |
97cd8493 RW |
1131 | } |
1132 | ||
1133 | const void *nb_callback_lookup_entry(const struct nb_node *nb_node, | |
1134 | const void *parent_list_entry, | |
1135 | const struct yang_list_keys *keys) | |
1136 | { | |
60ee8be1 RW |
1137 | struct nb_cb_lookup_entry_args args = {}; |
1138 | ||
97cd8493 RW |
1139 | DEBUGD(&nb_dbg_cbs_state, |
1140 | "northbound callback (lookup_entry): node [%s] parent_list_entry [%p]", | |
1141 | nb_node->xpath, parent_list_entry); | |
1142 | ||
60ee8be1 RW |
1143 | args.parent_list_entry = parent_list_entry; |
1144 | args.keys = keys; | |
1145 | return nb_node->cbs.lookup_entry(&args); | |
97cd8493 RW |
1146 | } |
1147 | ||
1148 | int nb_callback_rpc(const struct nb_node *nb_node, const char *xpath, | |
f63f5f19 CS |
1149 | const struct list *input, struct list *output, char *errmsg, |
1150 | size_t errmsg_len) | |
97cd8493 | 1151 | { |
60ee8be1 RW |
1152 | struct nb_cb_rpc_args args = {}; |
1153 | ||
97cd8493 RW |
1154 | DEBUGD(&nb_dbg_cbs_rpc, "northbound RPC: %s", xpath); |
1155 | ||
60ee8be1 RW |
1156 | args.xpath = xpath; |
1157 | args.input = input; | |
1158 | args.output = output; | |
f63f5f19 CS |
1159 | args.errmsg = errmsg; |
1160 | args.errmsg_len = errmsg_len; | |
60ee8be1 | 1161 | return nb_node->cbs.rpc(&args); |
1c2facd1 RW |
1162 | } |
1163 | ||
1164 | /* | |
1165 | * Call the northbound configuration callback associated to a given | |
1166 | * configuration change. | |
1167 | */ | |
13d6b9c1 RW |
1168 | static int nb_callback_configuration(struct nb_context *context, |
1169 | const enum nb_event event, | |
df5eda3d RW |
1170 | struct nb_config_change *change, |
1171 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
1172 | { |
1173 | enum nb_operation operation = change->cb.operation; | |
0de19c0e | 1174 | char xpath[XPATH_MAXLEN]; |
1c2facd1 RW |
1175 | const struct nb_node *nb_node = change->cb.nb_node; |
1176 | const struct lyd_node *dnode = change->cb.dnode; | |
1177 | union nb_resource *resource; | |
1178 | int ret = NB_ERR; | |
1179 | ||
1c2facd1 RW |
1180 | if (event == NB_EV_VALIDATE) |
1181 | resource = NULL; | |
1182 | else | |
1183 | resource = &change->resource; | |
1184 | ||
1185 | switch (operation) { | |
1186 | case NB_OP_CREATE: | |
13d6b9c1 | 1187 | ret = nb_callback_create(context, nb_node, event, dnode, |
df5eda3d | 1188 | resource, errmsg, errmsg_len); |
1c2facd1 RW |
1189 | break; |
1190 | case NB_OP_MODIFY: | |
13d6b9c1 | 1191 | ret = nb_callback_modify(context, nb_node, event, dnode, |
df5eda3d | 1192 | resource, errmsg, errmsg_len); |
1c2facd1 | 1193 | break; |
95ce849b | 1194 | case NB_OP_DESTROY: |
df5eda3d RW |
1195 | ret = nb_callback_destroy(context, nb_node, event, dnode, |
1196 | errmsg, errmsg_len); | |
1c2facd1 RW |
1197 | break; |
1198 | case NB_OP_MOVE: | |
df5eda3d RW |
1199 | ret = nb_callback_move(context, nb_node, event, dnode, errmsg, |
1200 | errmsg_len); | |
1c2facd1 RW |
1201 | break; |
1202 | default: | |
0de19c0e | 1203 | yang_dnode_get_path(dnode, xpath, sizeof(xpath)); |
c650e48c RW |
1204 | flog_err(EC_LIB_DEVELOPMENT, |
1205 | "%s: unknown operation (%u) [xpath %s]", __func__, | |
1206 | operation, xpath); | |
1207 | exit(1); | |
1c2facd1 RW |
1208 | } |
1209 | ||
625b70e3 | 1210 | if (ret != NB_OK) { |
c650e48c RW |
1211 | int priority; |
1212 | enum lib_log_refs ref; | |
ec348d43 | 1213 | |
0de19c0e RW |
1214 | yang_dnode_get_path(dnode, xpath, sizeof(xpath)); |
1215 | ||
625b70e3 EDP |
1216 | switch (event) { |
1217 | case NB_EV_VALIDATE: | |
c650e48c | 1218 | priority = LOG_WARNING; |
625b70e3 EDP |
1219 | ref = EC_LIB_NB_CB_CONFIG_VALIDATE; |
1220 | break; | |
1221 | case NB_EV_PREPARE: | |
c650e48c | 1222 | priority = LOG_WARNING; |
625b70e3 EDP |
1223 | ref = EC_LIB_NB_CB_CONFIG_PREPARE; |
1224 | break; | |
1225 | case NB_EV_ABORT: | |
c650e48c | 1226 | priority = LOG_WARNING; |
625b70e3 EDP |
1227 | ref = EC_LIB_NB_CB_CONFIG_ABORT; |
1228 | break; | |
1229 | case NB_EV_APPLY: | |
c650e48c | 1230 | priority = LOG_ERR; |
625b70e3 EDP |
1231 | ref = EC_LIB_NB_CB_CONFIG_APPLY; |
1232 | break; | |
c650e48c RW |
1233 | default: |
1234 | flog_err(EC_LIB_DEVELOPMENT, | |
1be4decb RW |
1235 | "%s: unknown event (%u) [xpath %s]", __func__, |
1236 | event, xpath); | |
c650e48c | 1237 | exit(1); |
625b70e3 | 1238 | } |
c650e48c RW |
1239 | |
1240 | flog(priority, ref, | |
df5eda3d RW |
1241 | "error processing configuration change: error [%s] event [%s] operation [%s] xpath [%s]", |
1242 | nb_err_name(ret), nb_event_name(event), | |
c650e48c | 1243 | nb_operation_name(operation), xpath); |
df5eda3d RW |
1244 | if (strlen(errmsg) > 0) |
1245 | flog(priority, ref, | |
1246 | "error processing configuration change: %s", | |
1247 | errmsg); | |
625b70e3 | 1248 | } |
1c2facd1 RW |
1249 | |
1250 | return ret; | |
1251 | } | |
1252 | ||
364ad673 | 1253 | static struct nb_transaction * |
df5eda3d RW |
1254 | nb_transaction_new(struct nb_context *context, struct nb_config *config, |
1255 | struct nb_config_cbs *changes, const char *comment, | |
1256 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
1257 | { |
1258 | struct nb_transaction *transaction; | |
1259 | ||
13d6b9c1 | 1260 | if (nb_running_lock_check(context->client, context->user)) { |
df5eda3d RW |
1261 | strlcpy(errmsg, |
1262 | "running configuration is locked by another client", | |
1263 | errmsg_len); | |
364ad673 RW |
1264 | return NULL; |
1265 | } | |
1266 | ||
1c2facd1 | 1267 | if (transaction_in_progress) { |
df5eda3d RW |
1268 | strlcpy(errmsg, |
1269 | "there's already another transaction in progress", | |
1270 | errmsg_len); | |
1c2facd1 RW |
1271 | return NULL; |
1272 | } | |
1273 | transaction_in_progress = true; | |
1274 | ||
1275 | transaction = XCALLOC(MTYPE_TMP, sizeof(*transaction)); | |
13d6b9c1 | 1276 | transaction->context = context; |
1c2facd1 RW |
1277 | if (comment) |
1278 | strlcpy(transaction->comment, comment, | |
1279 | sizeof(transaction->comment)); | |
1280 | transaction->config = config; | |
1281 | transaction->changes = *changes; | |
1282 | ||
1283 | return transaction; | |
1284 | } | |
1285 | ||
1286 | static void nb_transaction_free(struct nb_transaction *transaction) | |
1287 | { | |
1288 | nb_config_diff_del_changes(&transaction->changes); | |
1289 | XFREE(MTYPE_TMP, transaction); | |
1290 | transaction_in_progress = false; | |
1291 | } | |
1292 | ||
1293 | /* Process all configuration changes associated to a transaction. */ | |
1294 | static int nb_transaction_process(enum nb_event event, | |
df5eda3d RW |
1295 | struct nb_transaction *transaction, |
1296 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
1297 | { |
1298 | struct nb_config_cb *cb; | |
1299 | ||
8685be73 RW |
1300 | RB_FOREACH (cb, nb_config_cbs, &transaction->changes) { |
1301 | struct nb_config_change *change = (struct nb_config_change *)cb; | |
1302 | int ret; | |
1c2facd1 | 1303 | |
8685be73 RW |
1304 | /* |
1305 | * Only try to release resources that were allocated | |
1306 | * successfully. | |
1307 | */ | |
a8f58eb6 | 1308 | if (event == NB_EV_ABORT && !change->prepare_ok) |
8685be73 RW |
1309 | break; |
1310 | ||
1311 | /* Call the appropriate callback. */ | |
13d6b9c1 | 1312 | ret = nb_callback_configuration(transaction->context, event, |
df5eda3d | 1313 | change, errmsg, errmsg_len); |
8685be73 RW |
1314 | switch (event) { |
1315 | case NB_EV_PREPARE: | |
1316 | if (ret != NB_OK) | |
1317 | return ret; | |
1318 | change->prepare_ok = true; | |
1319 | break; | |
1320 | case NB_EV_ABORT: | |
1321 | case NB_EV_APPLY: | |
1c2facd1 | 1322 | /* |
8685be73 RW |
1323 | * At this point it's not possible to reject the |
1324 | * transaction anymore, so any failure here can lead to | |
1325 | * inconsistencies and should be treated as a bug. | |
1326 | * Operations prone to errors, like validations and | |
1327 | * resource allocations, should be performed during the | |
1328 | * 'prepare' phase. | |
1c2facd1 | 1329 | */ |
8685be73 RW |
1330 | break; |
1331 | default: | |
1332 | break; | |
1c2facd1 RW |
1333 | } |
1334 | } | |
1335 | ||
1336 | return NB_OK; | |
1337 | } | |
1338 | ||
1339 | static struct nb_config_cb * | |
0de19c0e | 1340 | nb_apply_finish_cb_new(struct nb_config_cbs *cbs, const struct nb_node *nb_node, |
1c2facd1 RW |
1341 | const struct lyd_node *dnode) |
1342 | { | |
1343 | struct nb_config_cb *cb; | |
1344 | ||
1345 | cb = XCALLOC(MTYPE_TMP, sizeof(*cb)); | |
1c2facd1 RW |
1346 | cb->nb_node = nb_node; |
1347 | cb->dnode = dnode; | |
1348 | RB_INSERT(nb_config_cbs, cbs, cb); | |
1349 | ||
1350 | return cb; | |
1351 | } | |
1352 | ||
1353 | static struct nb_config_cb * | |
fe3f2c61 RW |
1354 | nb_apply_finish_cb_find(struct nb_config_cbs *cbs, |
1355 | const struct nb_node *nb_node, | |
1356 | const struct lyd_node *dnode) | |
1c2facd1 RW |
1357 | { |
1358 | struct nb_config_cb s; | |
1359 | ||
fe3f2c61 | 1360 | s.seq = 0; |
1c2facd1 | 1361 | s.nb_node = nb_node; |
fe3f2c61 | 1362 | s.dnode = dnode; |
1c2facd1 RW |
1363 | return RB_FIND(nb_config_cbs, cbs, &s); |
1364 | } | |
1365 | ||
1366 | /* Call the 'apply_finish' callbacks. */ | |
df5eda3d RW |
1367 | static void nb_transaction_apply_finish(struct nb_transaction *transaction, |
1368 | char *errmsg, size_t errmsg_len) | |
1c2facd1 RW |
1369 | { |
1370 | struct nb_config_cbs cbs; | |
1371 | struct nb_config_cb *cb; | |
1372 | ||
1373 | /* Initialize tree of 'apply_finish' callbacks. */ | |
1374 | RB_INIT(nb_config_cbs, &cbs); | |
1375 | ||
1376 | /* Identify the 'apply_finish' callbacks that need to be called. */ | |
1377 | RB_FOREACH (cb, nb_config_cbs, &transaction->changes) { | |
1378 | struct nb_config_change *change = (struct nb_config_change *)cb; | |
1379 | const struct lyd_node *dnode = change->cb.dnode; | |
1380 | ||
1381 | /* | |
1382 | * Iterate up to the root of the data tree. When a node is being | |
1383 | * deleted, skip its 'apply_finish' callback if one is defined | |
1384 | * (the 'apply_finish' callbacks from the node ancestors should | |
1385 | * be called though). | |
1386 | */ | |
95ce849b | 1387 | if (change->cb.operation == NB_OP_DESTROY) { |
97cd8493 RW |
1388 | char xpath[XPATH_MAXLEN]; |
1389 | ||
1c2facd1 RW |
1390 | dnode = dnode->parent; |
1391 | if (!dnode) | |
1392 | break; | |
1393 | ||
1394 | /* | |
1395 | * The dnode from 'delete' callbacks point to elements | |
1396 | * from the running configuration. Use yang_dnode_get() | |
1397 | * to get the corresponding dnode from the candidate | |
1398 | * configuration that is being committed. | |
1399 | */ | |
1400 | yang_dnode_get_path(dnode, xpath, sizeof(xpath)); | |
1401 | dnode = yang_dnode_get(transaction->config->dnode, | |
1402 | xpath); | |
1403 | } | |
1404 | while (dnode) { | |
1c2facd1 RW |
1405 | struct nb_node *nb_node; |
1406 | ||
1407 | nb_node = dnode->schema->priv; | |
f267201b | 1408 | if (!nb_node || !nb_node->cbs.apply_finish) |
1c2facd1 RW |
1409 | goto next; |
1410 | ||
1411 | /* | |
1412 | * Don't call the callback more than once for the same | |
1413 | * data node. | |
1414 | */ | |
fe3f2c61 | 1415 | if (nb_apply_finish_cb_find(&cbs, nb_node, dnode)) |
1c2facd1 RW |
1416 | goto next; |
1417 | ||
0de19c0e | 1418 | nb_apply_finish_cb_new(&cbs, nb_node, dnode); |
1c2facd1 RW |
1419 | |
1420 | next: | |
1421 | dnode = dnode->parent; | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | /* Call the 'apply_finish' callbacks, sorted by their priorities. */ | |
97cd8493 | 1426 | RB_FOREACH (cb, nb_config_cbs, &cbs) |
13d6b9c1 | 1427 | nb_callback_apply_finish(transaction->context, cb->nb_node, |
df5eda3d | 1428 | cb->dnode, errmsg, errmsg_len); |
1c2facd1 RW |
1429 | |
1430 | /* Release memory. */ | |
1431 | while (!RB_EMPTY(nb_config_cbs, &cbs)) { | |
1432 | cb = RB_ROOT(nb_config_cbs, &cbs); | |
1433 | RB_REMOVE(nb_config_cbs, &cbs, cb); | |
1434 | XFREE(MTYPE_TMP, cb); | |
1435 | } | |
1436 | } | |
1437 | ||
1a4bc045 RW |
1438 | static int nb_oper_data_iter_children(const struct lys_node *snode, |
1439 | const char *xpath, const void *list_entry, | |
1440 | const struct yang_list_keys *list_keys, | |
1441 | struct yang_translator *translator, | |
1442 | bool first, uint32_t flags, | |
1443 | nb_oper_data_cb cb, void *arg) | |
1444 | { | |
1445 | struct lys_node *child; | |
1446 | ||
1447 | LY_TREE_FOR (snode->child, child) { | |
1448 | int ret; | |
1449 | ||
1450 | ret = nb_oper_data_iter_node(child, xpath, list_entry, | |
1451 | list_keys, translator, false, | |
1452 | flags, cb, arg); | |
1453 | if (ret != NB_OK) | |
1454 | return ret; | |
1455 | } | |
1456 | ||
1457 | return NB_OK; | |
1458 | } | |
1459 | ||
1460 | static int nb_oper_data_iter_leaf(const struct nb_node *nb_node, | |
1461 | const char *xpath, const void *list_entry, | |
1462 | const struct yang_list_keys *list_keys, | |
1463 | struct yang_translator *translator, | |
1464 | uint32_t flags, nb_oper_data_cb cb, void *arg) | |
1465 | { | |
1466 | struct yang_data *data; | |
1467 | ||
1468 | if (CHECK_FLAG(nb_node->snode->flags, LYS_CONFIG_W)) | |
1469 | return NB_OK; | |
1470 | ||
1471 | /* Ignore list keys. */ | |
1472 | if (lys_is_key((struct lys_node_leaf *)nb_node->snode, NULL)) | |
1473 | return NB_OK; | |
1474 | ||
9eb2c0a1 | 1475 | data = nb_callback_get_elem(nb_node, xpath, list_entry); |
1a4bc045 RW |
1476 | if (data == NULL) |
1477 | /* Leaf of type "empty" is not present. */ | |
1478 | return NB_OK; | |
1479 | ||
1480 | return (*cb)(nb_node->snode, translator, data, arg); | |
1481 | } | |
1482 | ||
1483 | static int nb_oper_data_iter_container(const struct nb_node *nb_node, | |
1484 | const char *xpath, | |
1485 | const void *list_entry, | |
1486 | const struct yang_list_keys *list_keys, | |
1487 | struct yang_translator *translator, | |
1488 | uint32_t flags, nb_oper_data_cb cb, | |
1489 | void *arg) | |
1490 | { | |
1491 | if (CHECK_FLAG(nb_node->flags, F_NB_NODE_CONFIG_ONLY)) | |
1492 | return NB_OK; | |
1493 | ||
1494 | /* Presence containers. */ | |
1495 | if (nb_node->cbs.get_elem) { | |
1496 | struct yang_data *data; | |
1497 | int ret; | |
1498 | ||
9eb2c0a1 | 1499 | data = nb_callback_get_elem(nb_node, xpath, list_entry); |
1a4bc045 RW |
1500 | if (data == NULL) |
1501 | /* Presence container is not present. */ | |
1502 | return NB_OK; | |
1503 | ||
1504 | ret = (*cb)(nb_node->snode, translator, data, arg); | |
1505 | if (ret != NB_OK) | |
1506 | return ret; | |
1507 | } | |
1508 | ||
1509 | /* Iterate over the child nodes. */ | |
1510 | return nb_oper_data_iter_children(nb_node->snode, xpath, list_entry, | |
1511 | list_keys, translator, false, flags, | |
1512 | cb, arg); | |
1513 | } | |
1514 | ||
1515 | static int | |
1516 | nb_oper_data_iter_leaflist(const struct nb_node *nb_node, const char *xpath, | |
1517 | const void *parent_list_entry, | |
1518 | const struct yang_list_keys *parent_list_keys, | |
1519 | struct yang_translator *translator, uint32_t flags, | |
1520 | nb_oper_data_cb cb, void *arg) | |
1521 | { | |
1522 | const void *list_entry = NULL; | |
1523 | ||
1524 | if (CHECK_FLAG(nb_node->snode->flags, LYS_CONFIG_W)) | |
1525 | return NB_OK; | |
1526 | ||
1527 | do { | |
1528 | struct yang_data *data; | |
1529 | int ret; | |
1530 | ||
9eb2c0a1 RW |
1531 | list_entry = nb_callback_get_next(nb_node, parent_list_entry, |
1532 | list_entry); | |
1a4bc045 RW |
1533 | if (!list_entry) |
1534 | /* End of the list. */ | |
1535 | break; | |
1536 | ||
9eb2c0a1 | 1537 | data = nb_callback_get_elem(nb_node, xpath, list_entry); |
1a4bc045 RW |
1538 | if (data == NULL) |
1539 | continue; | |
1540 | ||
1541 | ret = (*cb)(nb_node->snode, translator, data, arg); | |
1542 | if (ret != NB_OK) | |
1543 | return ret; | |
1544 | } while (list_entry); | |
1545 | ||
1546 | return NB_OK; | |
1547 | } | |
1548 | ||
1549 | static int nb_oper_data_iter_list(const struct nb_node *nb_node, | |
1550 | const char *xpath_list, | |
1551 | const void *parent_list_entry, | |
1552 | const struct yang_list_keys *parent_list_keys, | |
1553 | struct yang_translator *translator, | |
1554 | uint32_t flags, nb_oper_data_cb cb, void *arg) | |
1555 | { | |
1556 | struct lys_node_list *slist = (struct lys_node_list *)nb_node->snode; | |
1557 | const void *list_entry = NULL; | |
99fb518f | 1558 | uint32_t position = 1; |
1a4bc045 RW |
1559 | |
1560 | if (CHECK_FLAG(nb_node->flags, F_NB_NODE_CONFIG_ONLY)) | |
1561 | return NB_OK; | |
1562 | ||
1563 | /* Iterate over all list entries. */ | |
1564 | do { | |
1565 | struct yang_list_keys list_keys; | |
f999f11e | 1566 | char xpath[XPATH_MAXLEN * 2]; |
1a4bc045 RW |
1567 | int ret; |
1568 | ||
1569 | /* Obtain list entry. */ | |
9eb2c0a1 RW |
1570 | list_entry = nb_callback_get_next(nb_node, parent_list_entry, |
1571 | list_entry); | |
1a4bc045 RW |
1572 | if (!list_entry) |
1573 | /* End of the list. */ | |
1574 | break; | |
1575 | ||
99fb518f RW |
1576 | if (!CHECK_FLAG(nb_node->flags, F_NB_NODE_KEYLESS_LIST)) { |
1577 | /* Obtain the list entry keys. */ | |
9eb2c0a1 RW |
1578 | if (nb_callback_get_keys(nb_node, list_entry, |
1579 | &list_keys) | |
99fb518f RW |
1580 | != NB_OK) { |
1581 | flog_warn(EC_LIB_NB_CB_STATE, | |
1582 | "%s: failed to get list keys", | |
1583 | __func__); | |
1584 | return NB_ERR; | |
1585 | } | |
1586 | ||
1587 | /* Build XPath of the list entry. */ | |
1588 | strlcpy(xpath, xpath_list, sizeof(xpath)); | |
1589 | for (unsigned int i = 0; i < list_keys.num; i++) { | |
1590 | snprintf(xpath + strlen(xpath), | |
1591 | sizeof(xpath) - strlen(xpath), | |
1592 | "[%s='%s']", slist->keys[i]->name, | |
1593 | list_keys.key[i]); | |
1594 | } | |
1595 | } else { | |
1596 | /* | |
1597 | * Keyless list - build XPath using a positional index. | |
1598 | */ | |
1599 | snprintf(xpath, sizeof(xpath), "%s[%u]", xpath_list, | |
1600 | position); | |
1601 | position++; | |
1a4bc045 RW |
1602 | } |
1603 | ||
1604 | /* Iterate over the child nodes. */ | |
1605 | ret = nb_oper_data_iter_children( | |
1606 | nb_node->snode, xpath, list_entry, &list_keys, | |
1607 | translator, false, flags, cb, arg); | |
1608 | if (ret != NB_OK) | |
1609 | return ret; | |
1610 | } while (list_entry); | |
1611 | ||
1612 | return NB_OK; | |
1613 | } | |
1614 | ||
1615 | static int nb_oper_data_iter_node(const struct lys_node *snode, | |
1616 | const char *xpath_parent, | |
1617 | const void *list_entry, | |
1618 | const struct yang_list_keys *list_keys, | |
1619 | struct yang_translator *translator, | |
1620 | bool first, uint32_t flags, | |
1621 | nb_oper_data_cb cb, void *arg) | |
1622 | { | |
1623 | struct nb_node *nb_node; | |
1624 | char xpath[XPATH_MAXLEN]; | |
1625 | int ret = NB_OK; | |
1626 | ||
1627 | if (!first && CHECK_FLAG(flags, NB_OPER_DATA_ITER_NORECURSE) | |
1628 | && CHECK_FLAG(snode->nodetype, LYS_CONTAINER | LYS_LIST)) | |
1629 | return NB_OK; | |
1630 | ||
1631 | /* Update XPath. */ | |
1632 | strlcpy(xpath, xpath_parent, sizeof(xpath)); | |
6cd301e0 RW |
1633 | if (!first && snode->nodetype != LYS_USES) { |
1634 | struct lys_node *parent; | |
1635 | ||
1636 | /* Get the real parent. */ | |
1637 | parent = snode->parent; | |
1638 | while (parent && parent->nodetype == LYS_USES) | |
1639 | parent = parent->parent; | |
1640 | ||
1641 | /* | |
1642 | * When necessary, include the namespace of the augmenting | |
1643 | * module. | |
1644 | */ | |
1645 | if (parent && parent->nodetype == LYS_AUGMENT) | |
1646 | snprintf(xpath + strlen(xpath), | |
1647 | sizeof(xpath) - strlen(xpath), "/%s:%s", | |
1648 | snode->module->name, snode->name); | |
1649 | else | |
1650 | snprintf(xpath + strlen(xpath), | |
1651 | sizeof(xpath) - strlen(xpath), "/%s", | |
1652 | snode->name); | |
1653 | } | |
1a4bc045 RW |
1654 | |
1655 | nb_node = snode->priv; | |
1656 | switch (snode->nodetype) { | |
1657 | case LYS_CONTAINER: | |
1658 | ret = nb_oper_data_iter_container(nb_node, xpath, list_entry, | |
1659 | list_keys, translator, flags, | |
1660 | cb, arg); | |
1661 | break; | |
1662 | case LYS_LEAF: | |
1663 | ret = nb_oper_data_iter_leaf(nb_node, xpath, list_entry, | |
1664 | list_keys, translator, flags, cb, | |
1665 | arg); | |
1666 | break; | |
1667 | case LYS_LEAFLIST: | |
1668 | ret = nb_oper_data_iter_leaflist(nb_node, xpath, list_entry, | |
1669 | list_keys, translator, flags, | |
1670 | cb, arg); | |
1671 | break; | |
1672 | case LYS_LIST: | |
1673 | ret = nb_oper_data_iter_list(nb_node, xpath, list_entry, | |
1674 | list_keys, translator, flags, cb, | |
1675 | arg); | |
1676 | break; | |
1677 | case LYS_USES: | |
1678 | ret = nb_oper_data_iter_children(snode, xpath, list_entry, | |
1679 | list_keys, translator, false, | |
1680 | flags, cb, arg); | |
1681 | break; | |
1682 | default: | |
1683 | break; | |
1684 | } | |
1685 | ||
1686 | return ret; | |
1687 | } | |
1688 | ||
1689 | int nb_oper_data_iterate(const char *xpath, struct yang_translator *translator, | |
1690 | uint32_t flags, nb_oper_data_cb cb, void *arg) | |
1691 | { | |
1692 | struct nb_node *nb_node; | |
1693 | const void *list_entry = NULL; | |
1694 | struct yang_list_keys list_keys; | |
1695 | struct list *list_dnodes; | |
1696 | struct lyd_node *dnode, *dn; | |
1697 | struct listnode *ln; | |
1698 | int ret; | |
1699 | ||
1700 | nb_node = nb_node_find(xpath); | |
1701 | if (!nb_node) { | |
1702 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
1703 | "%s: unknown data path: %s", __func__, xpath); | |
1704 | return NB_ERR; | |
1705 | } | |
1706 | ||
1707 | /* For now this function works only with containers and lists. */ | |
1708 | if (!CHECK_FLAG(nb_node->snode->nodetype, LYS_CONTAINER | LYS_LIST)) { | |
1709 | flog_warn( | |
1710 | EC_LIB_NB_OPERATIONAL_DATA, | |
1711 | "%s: can't iterate over YANG leaf or leaf-list [xpath %s]", | |
1712 | __func__, xpath); | |
1713 | return NB_ERR; | |
1714 | } | |
1715 | ||
1716 | /* | |
1717 | * Create a data tree from the XPath so that we can parse the keys of | |
1718 | * all YANG lists (if any). | |
1719 | */ | |
1720 | ly_errno = 0; | |
1721 | dnode = lyd_new_path(NULL, ly_native_ctx, xpath, NULL, 0, | |
dfe22738 RW |
1722 | LYD_PATH_OPT_UPDATE | LYD_PATH_OPT_NOPARENTRET); |
1723 | if (!dnode) { | |
1a4bc045 RW |
1724 | flog_warn(EC_LIB_LIBYANG, "%s: lyd_new_path() failed", |
1725 | __func__); | |
1726 | return NB_ERR; | |
1727 | } | |
1a4bc045 RW |
1728 | |
1729 | /* | |
1730 | * Create a linked list to sort the data nodes starting from the root. | |
1731 | */ | |
1732 | list_dnodes = list_new(); | |
1733 | for (dn = dnode; dn; dn = dn->parent) { | |
1734 | if (dn->schema->nodetype != LYS_LIST || !dn->child) | |
1735 | continue; | |
1736 | listnode_add_head(list_dnodes, dn); | |
1737 | } | |
1738 | /* | |
1739 | * Use the northbound callbacks to find list entry pointer corresponding | |
1740 | * to the given XPath. | |
1741 | */ | |
1742 | for (ALL_LIST_ELEMENTS_RO(list_dnodes, ln, dn)) { | |
1743 | struct lyd_node *child; | |
1744 | struct nb_node *nn; | |
1745 | unsigned int n = 0; | |
1746 | ||
1747 | /* Obtain the list entry keys. */ | |
1748 | memset(&list_keys, 0, sizeof(list_keys)); | |
1749 | LY_TREE_FOR (dn->child, child) { | |
1750 | if (!lys_is_key((struct lys_node_leaf *)child->schema, | |
1751 | NULL)) | |
1752 | continue; | |
1753 | strlcpy(list_keys.key[n], | |
1754 | yang_dnode_get_string(child, NULL), | |
1755 | sizeof(list_keys.key[n])); | |
1756 | n++; | |
1757 | } | |
1758 | list_keys.num = n; | |
9f6de299 RW |
1759 | if (list_keys.num |
1760 | != ((struct lys_node_list *)dn->schema)->keys_size) { | |
1761 | list_delete(&list_dnodes); | |
1762 | yang_dnode_free(dnode); | |
1763 | return NB_ERR_NOT_FOUND; | |
1764 | } | |
1a4bc045 RW |
1765 | |
1766 | /* Find the list entry pointer. */ | |
1767 | nn = dn->schema->priv; | |
9eb2c0a1 RW |
1768 | list_entry = |
1769 | nb_callback_lookup_entry(nn, list_entry, &list_keys); | |
1a4bc045 RW |
1770 | if (list_entry == NULL) { |
1771 | list_delete(&list_dnodes); | |
1772 | yang_dnode_free(dnode); | |
1773 | return NB_ERR_NOT_FOUND; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* If a list entry was given, iterate over that list entry only. */ | |
1778 | if (dnode->schema->nodetype == LYS_LIST && dnode->child) | |
1779 | ret = nb_oper_data_iter_children( | |
1780 | nb_node->snode, xpath, list_entry, &list_keys, | |
1781 | translator, true, flags, cb, arg); | |
1782 | else | |
1783 | ret = nb_oper_data_iter_node(nb_node->snode, xpath, list_entry, | |
1784 | &list_keys, translator, true, | |
1785 | flags, cb, arg); | |
1786 | ||
1787 | list_delete(&list_dnodes); | |
1788 | yang_dnode_free(dnode); | |
1789 | ||
1790 | return ret; | |
1791 | } | |
1792 | ||
1c2facd1 RW |
1793 | bool nb_operation_is_valid(enum nb_operation operation, |
1794 | const struct lys_node *snode) | |
1795 | { | |
544ca69a | 1796 | struct nb_node *nb_node = snode->priv; |
1c2facd1 RW |
1797 | struct lys_node_container *scontainer; |
1798 | struct lys_node_leaf *sleaf; | |
1799 | ||
1800 | switch (operation) { | |
1801 | case NB_OP_CREATE: | |
db452508 | 1802 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_W)) |
1c2facd1 RW |
1803 | return false; |
1804 | ||
1805 | switch (snode->nodetype) { | |
1806 | case LYS_LEAF: | |
1807 | sleaf = (struct lys_node_leaf *)snode; | |
1808 | if (sleaf->type.base != LY_TYPE_EMPTY) | |
1809 | return false; | |
1810 | break; | |
1811 | case LYS_CONTAINER: | |
1812 | scontainer = (struct lys_node_container *)snode; | |
1813 | if (!scontainer->presence) | |
1814 | return false; | |
1815 | break; | |
1816 | case LYS_LIST: | |
1817 | case LYS_LEAFLIST: | |
1818 | break; | |
1819 | default: | |
1820 | return false; | |
1821 | } | |
1822 | return true; | |
1823 | case NB_OP_MODIFY: | |
db452508 | 1824 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_W)) |
1c2facd1 RW |
1825 | return false; |
1826 | ||
1827 | switch (snode->nodetype) { | |
1828 | case LYS_LEAF: | |
1829 | sleaf = (struct lys_node_leaf *)snode; | |
1830 | if (sleaf->type.base == LY_TYPE_EMPTY) | |
1831 | return false; | |
1832 | ||
1833 | /* List keys can't be modified. */ | |
1834 | if (lys_is_key(sleaf, NULL)) | |
1835 | return false; | |
1836 | break; | |
1837 | default: | |
1838 | return false; | |
1839 | } | |
1840 | return true; | |
95ce849b | 1841 | case NB_OP_DESTROY: |
db452508 | 1842 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_W)) |
1c2facd1 RW |
1843 | return false; |
1844 | ||
1845 | switch (snode->nodetype) { | |
1846 | case LYS_LEAF: | |
1847 | sleaf = (struct lys_node_leaf *)snode; | |
1848 | ||
1849 | /* List keys can't be deleted. */ | |
1850 | if (lys_is_key(sleaf, NULL)) | |
1851 | return false; | |
1852 | ||
1853 | /* | |
1854 | * Only optional leafs can be deleted, or leafs whose | |
1855 | * parent is a case statement. | |
1856 | */ | |
1857 | if (snode->parent->nodetype == LYS_CASE) | |
1858 | return true; | |
1859 | if (sleaf->when) | |
1860 | return true; | |
db452508 RW |
1861 | if (CHECK_FLAG(sleaf->flags, LYS_MAND_TRUE) |
1862 | || sleaf->dflt) | |
1c2facd1 RW |
1863 | return false; |
1864 | break; | |
1865 | case LYS_CONTAINER: | |
1866 | scontainer = (struct lys_node_container *)snode; | |
1867 | if (!scontainer->presence) | |
1868 | return false; | |
1869 | break; | |
1870 | case LYS_LIST: | |
1871 | case LYS_LEAFLIST: | |
1872 | break; | |
1873 | default: | |
1874 | return false; | |
1875 | } | |
1876 | return true; | |
1877 | case NB_OP_MOVE: | |
db452508 | 1878 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_W)) |
1c2facd1 RW |
1879 | return false; |
1880 | ||
1881 | switch (snode->nodetype) { | |
1882 | case LYS_LIST: | |
1883 | case LYS_LEAFLIST: | |
db452508 | 1884 | if (!CHECK_FLAG(snode->flags, LYS_USERORDERED)) |
1c2facd1 RW |
1885 | return false; |
1886 | break; | |
1887 | default: | |
1888 | return false; | |
1889 | } | |
1890 | return true; | |
34224f0c | 1891 | case NB_OP_PRE_VALIDATE: |
1c2facd1 | 1892 | case NB_OP_APPLY_FINISH: |
db452508 | 1893 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_W)) |
1c2facd1 RW |
1894 | return false; |
1895 | return true; | |
1896 | case NB_OP_GET_ELEM: | |
db452508 | 1897 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_R)) |
1c2facd1 RW |
1898 | return false; |
1899 | ||
1900 | switch (snode->nodetype) { | |
1901 | case LYS_LEAF: | |
1a4bc045 | 1902 | case LYS_LEAFLIST: |
1c2facd1 RW |
1903 | break; |
1904 | case LYS_CONTAINER: | |
1905 | scontainer = (struct lys_node_container *)snode; | |
1906 | if (!scontainer->presence) | |
1907 | return false; | |
1908 | break; | |
1909 | default: | |
1910 | return false; | |
1911 | } | |
1912 | return true; | |
1913 | case NB_OP_GET_NEXT: | |
1a4bc045 RW |
1914 | switch (snode->nodetype) { |
1915 | case LYS_LIST: | |
1916 | if (CHECK_FLAG(nb_node->flags, F_NB_NODE_CONFIG_ONLY)) | |
1917 | return false; | |
1918 | break; | |
1919 | case LYS_LEAFLIST: | |
1920 | if (CHECK_FLAG(snode->flags, LYS_CONFIG_W)) | |
1921 | return false; | |
1922 | break; | |
1923 | default: | |
1924 | return false; | |
1925 | } | |
1926 | return true; | |
1c2facd1 RW |
1927 | case NB_OP_GET_KEYS: |
1928 | case NB_OP_LOOKUP_ENTRY: | |
1c2facd1 RW |
1929 | switch (snode->nodetype) { |
1930 | case LYS_LIST: | |
544ca69a RW |
1931 | if (CHECK_FLAG(nb_node->flags, F_NB_NODE_CONFIG_ONLY)) |
1932 | return false; | |
99fb518f RW |
1933 | if (CHECK_FLAG(nb_node->flags, F_NB_NODE_KEYLESS_LIST)) |
1934 | return false; | |
1c2facd1 RW |
1935 | break; |
1936 | default: | |
1937 | return false; | |
1938 | } | |
1939 | return true; | |
1940 | case NB_OP_RPC: | |
db452508 | 1941 | if (CHECK_FLAG(snode->flags, LYS_CONFIG_W | LYS_CONFIG_R)) |
1c2facd1 RW |
1942 | return false; |
1943 | ||
1944 | switch (snode->nodetype) { | |
1945 | case LYS_RPC: | |
1946 | case LYS_ACTION: | |
1947 | break; | |
1948 | default: | |
1949 | return false; | |
1950 | } | |
1951 | return true; | |
1952 | default: | |
1953 | return false; | |
1954 | } | |
1955 | } | |
1956 | ||
1957 | DEFINE_HOOK(nb_notification_send, (const char *xpath, struct list *arguments), | |
1958 | (xpath, arguments)); | |
1959 | ||
1960 | int nb_notification_send(const char *xpath, struct list *arguments) | |
1961 | { | |
1962 | int ret; | |
1963 | ||
9eb2c0a1 RW |
1964 | DEBUGD(&nb_dbg_notif, "northbound notification: %s", xpath); |
1965 | ||
1c2facd1 RW |
1966 | ret = hook_call(nb_notification_send, xpath, arguments); |
1967 | if (arguments) | |
1968 | list_delete(&arguments); | |
1969 | ||
1970 | return ret; | |
1971 | } | |
1972 | ||
ccd43ada RW |
1973 | /* Running configuration user pointers management. */ |
1974 | struct nb_config_entry { | |
1975 | char xpath[XPATH_MAXLEN]; | |
1976 | void *entry; | |
1977 | }; | |
1978 | ||
1979 | static bool running_config_entry_cmp(const void *value1, const void *value2) | |
1980 | { | |
1981 | const struct nb_config_entry *c1 = value1; | |
1982 | const struct nb_config_entry *c2 = value2; | |
1983 | ||
1984 | return strmatch(c1->xpath, c2->xpath); | |
1985 | } | |
1986 | ||
d8b87afe | 1987 | static unsigned int running_config_entry_key_make(const void *value) |
ccd43ada RW |
1988 | { |
1989 | return string_hash_make(value); | |
1990 | } | |
1991 | ||
1992 | static void *running_config_entry_alloc(void *p) | |
1993 | { | |
1994 | struct nb_config_entry *new, *key = p; | |
1995 | ||
1996 | new = XCALLOC(MTYPE_NB_CONFIG_ENTRY, sizeof(*new)); | |
1997 | strlcpy(new->xpath, key->xpath, sizeof(new->xpath)); | |
1998 | ||
1999 | return new; | |
2000 | } | |
2001 | ||
2002 | static void running_config_entry_free(void *arg) | |
2003 | { | |
2004 | XFREE(MTYPE_NB_CONFIG_ENTRY, arg); | |
2005 | } | |
2006 | ||
2007 | void nb_running_set_entry(const struct lyd_node *dnode, void *entry) | |
2008 | { | |
2009 | struct nb_config_entry *config, s; | |
2010 | ||
2011 | yang_dnode_get_path(dnode, s.xpath, sizeof(s.xpath)); | |
2012 | config = hash_get(running_config_entries, &s, | |
2013 | running_config_entry_alloc); | |
2014 | config->entry = entry; | |
2015 | } | |
2016 | ||
f7c20aa1 QY |
2017 | void nb_running_move_tree(const char *xpath_from, const char *xpath_to) |
2018 | { | |
2019 | struct nb_config_entry *entry; | |
2020 | struct list *entries = hash_to_list(running_config_entries); | |
2021 | struct listnode *ln; | |
2022 | ||
2023 | for (ALL_LIST_ELEMENTS_RO(entries, ln, entry)) { | |
2024 | if (!frrstr_startswith(entry->xpath, xpath_from)) | |
2025 | continue; | |
2026 | ||
2027 | hash_release(running_config_entries, entry); | |
2028 | ||
2029 | char *newpath = | |
2030 | frrstr_replace(entry->xpath, xpath_from, xpath_to); | |
2031 | strlcpy(entry->xpath, newpath, sizeof(entry->xpath)); | |
2032 | XFREE(MTYPE_TMP, newpath); | |
2033 | ||
2034 | hash_get(running_config_entries, entry, hash_alloc_intern); | |
2035 | } | |
2036 | ||
2037 | list_delete(&entries); | |
2038 | } | |
2039 | ||
ccd43ada RW |
2040 | static void *nb_running_unset_entry_helper(const struct lyd_node *dnode) |
2041 | { | |
2042 | struct nb_config_entry *config, s; | |
2043 | struct lyd_node *child; | |
2044 | void *entry = NULL; | |
2045 | ||
2046 | yang_dnode_get_path(dnode, s.xpath, sizeof(s.xpath)); | |
2047 | config = hash_release(running_config_entries, &s); | |
2048 | if (config) { | |
2049 | entry = config->entry; | |
2050 | running_config_entry_free(config); | |
2051 | } | |
2052 | ||
2053 | /* Unset user pointers from the child nodes. */ | |
2054 | if (CHECK_FLAG(dnode->schema->nodetype, LYS_LIST | LYS_CONTAINER)) { | |
2055 | LY_TREE_FOR (dnode->child, child) { | |
2056 | (void)nb_running_unset_entry_helper(child); | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | return entry; | |
2061 | } | |
2062 | ||
2063 | void *nb_running_unset_entry(const struct lyd_node *dnode) | |
2064 | { | |
2065 | void *entry; | |
2066 | ||
2067 | entry = nb_running_unset_entry_helper(dnode); | |
2068 | assert(entry); | |
2069 | ||
2070 | return entry; | |
2071 | } | |
2072 | ||
b112b1ab G |
2073 | static void *nb_running_get_entry_worker(const struct lyd_node *dnode, |
2074 | const char *xpath, | |
2075 | bool abort_if_not_found, | |
2076 | bool rec_search) | |
ccd43ada RW |
2077 | { |
2078 | const struct lyd_node *orig_dnode = dnode; | |
2079 | char xpath_buf[XPATH_MAXLEN]; | |
b112b1ab | 2080 | bool rec_flag = true; |
ccd43ada RW |
2081 | |
2082 | assert(dnode || xpath); | |
2083 | ||
2084 | if (!dnode) | |
2085 | dnode = yang_dnode_get(running_config->dnode, xpath); | |
2086 | ||
b112b1ab | 2087 | while (rec_flag && dnode) { |
ccd43ada RW |
2088 | struct nb_config_entry *config, s; |
2089 | ||
2090 | yang_dnode_get_path(dnode, s.xpath, sizeof(s.xpath)); | |
2091 | config = hash_lookup(running_config_entries, &s); | |
2092 | if (config) | |
2093 | return config->entry; | |
2094 | ||
b112b1ab G |
2095 | rec_flag = rec_search; |
2096 | ||
ccd43ada RW |
2097 | dnode = dnode->parent; |
2098 | } | |
2099 | ||
2100 | if (!abort_if_not_found) | |
2101 | return NULL; | |
2102 | ||
2103 | yang_dnode_get_path(orig_dnode, xpath_buf, sizeof(xpath_buf)); | |
2104 | flog_err(EC_LIB_YANG_DNODE_NOT_FOUND, | |
2105 | "%s: failed to find entry [xpath %s]", __func__, xpath_buf); | |
2106 | zlog_backtrace(LOG_ERR); | |
2107 | abort(); | |
2108 | } | |
2109 | ||
b112b1ab G |
2110 | void *nb_running_get_entry(const struct lyd_node *dnode, const char *xpath, |
2111 | bool abort_if_not_found) | |
2112 | { | |
2113 | return nb_running_get_entry_worker(dnode, xpath, abort_if_not_found, | |
2114 | true); | |
2115 | } | |
2116 | ||
2117 | void *nb_running_get_entry_non_rec(const struct lyd_node *dnode, | |
2118 | const char *xpath, bool abort_if_not_found) | |
2119 | { | |
2120 | return nb_running_get_entry_worker(dnode, xpath, abort_if_not_found, | |
2121 | false); | |
2122 | } | |
2123 | ||
ccd43ada | 2124 | /* Logging functions. */ |
1c2facd1 RW |
2125 | const char *nb_event_name(enum nb_event event) |
2126 | { | |
2127 | switch (event) { | |
2128 | case NB_EV_VALIDATE: | |
2129 | return "validate"; | |
2130 | case NB_EV_PREPARE: | |
2131 | return "prepare"; | |
2132 | case NB_EV_ABORT: | |
2133 | return "abort"; | |
2134 | case NB_EV_APPLY: | |
2135 | return "apply"; | |
2136 | default: | |
2137 | return "unknown"; | |
2138 | } | |
2139 | } | |
2140 | ||
2141 | const char *nb_operation_name(enum nb_operation operation) | |
2142 | { | |
2143 | switch (operation) { | |
2144 | case NB_OP_CREATE: | |
2145 | return "create"; | |
2146 | case NB_OP_MODIFY: | |
2147 | return "modify"; | |
95ce849b MS |
2148 | case NB_OP_DESTROY: |
2149 | return "destroy"; | |
1c2facd1 RW |
2150 | case NB_OP_MOVE: |
2151 | return "move"; | |
34224f0c RW |
2152 | case NB_OP_PRE_VALIDATE: |
2153 | return "pre_validate"; | |
1c2facd1 RW |
2154 | case NB_OP_APPLY_FINISH: |
2155 | return "apply_finish"; | |
2156 | case NB_OP_GET_ELEM: | |
2157 | return "get_elem"; | |
2158 | case NB_OP_GET_NEXT: | |
2159 | return "get_next"; | |
2160 | case NB_OP_GET_KEYS: | |
2161 | return "get_keys"; | |
2162 | case NB_OP_LOOKUP_ENTRY: | |
2163 | return "lookup_entry"; | |
2164 | case NB_OP_RPC: | |
2165 | return "rpc"; | |
2166 | default: | |
2167 | return "unknown"; | |
2168 | } | |
2169 | } | |
2170 | ||
2171 | const char *nb_err_name(enum nb_error error) | |
2172 | { | |
2173 | switch (error) { | |
2174 | case NB_OK: | |
2175 | return "ok"; | |
2176 | case NB_ERR: | |
2177 | return "generic error"; | |
2178 | case NB_ERR_NO_CHANGES: | |
2179 | return "no changes"; | |
2180 | case NB_ERR_NOT_FOUND: | |
2181 | return "element not found"; | |
2182 | case NB_ERR_LOCKED: | |
2183 | return "resource is locked"; | |
2184 | case NB_ERR_VALIDATION: | |
df5eda3d | 2185 | return "validation"; |
1c2facd1 RW |
2186 | case NB_ERR_RESOURCE: |
2187 | return "failed to allocate resource"; | |
2188 | case NB_ERR_INCONSISTENCY: | |
2189 | return "internal inconsistency"; | |
2190 | default: | |
2191 | return "unknown"; | |
2192 | } | |
2193 | } | |
2194 | ||
2195 | const char *nb_client_name(enum nb_client client) | |
2196 | { | |
2197 | switch (client) { | |
2198 | case NB_CLIENT_CLI: | |
2199 | return "CLI"; | |
5bce33b3 RW |
2200 | case NB_CLIENT_CONFD: |
2201 | return "ConfD"; | |
a7ca2199 RW |
2202 | case NB_CLIENT_SYSREPO: |
2203 | return "Sysrepo"; | |
ec2ac5f2 RW |
2204 | case NB_CLIENT_GRPC: |
2205 | return "gRPC"; | |
1c2facd1 RW |
2206 | default: |
2207 | return "unknown"; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | static void nb_load_callbacks(const struct frr_yang_module_info *module) | |
2212 | { | |
2213 | for (size_t i = 0; module->nodes[i].xpath; i++) { | |
2214 | struct nb_node *nb_node; | |
2215 | uint32_t priority; | |
2216 | ||
dc397e4c RW |
2217 | if (i > YANG_MODULE_MAX_NODES) { |
2218 | zlog_err( | |
2219 | "%s: %s.yang has more than %u nodes. Please increase YANG_MODULE_MAX_NODES to fix this problem.", | |
2220 | __func__, module->name, YANG_MODULE_MAX_NODES); | |
2221 | exit(1); | |
2222 | } | |
2223 | ||
1c2facd1 RW |
2224 | nb_node = nb_node_find(module->nodes[i].xpath); |
2225 | if (!nb_node) { | |
2226 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
2227 | "%s: unknown data path: %s", __func__, | |
2228 | module->nodes[i].xpath); | |
2229 | continue; | |
2230 | } | |
2231 | ||
2232 | nb_node->cbs = module->nodes[i].cbs; | |
2233 | priority = module->nodes[i].priority; | |
2234 | if (priority != 0) | |
2235 | nb_node->priority = priority; | |
2236 | } | |
2237 | } | |
2238 | ||
59e85ca1 | 2239 | void nb_validate_callbacks(void) |
1c2facd1 RW |
2240 | { |
2241 | unsigned int errors = 0; | |
2242 | ||
8d869d37 | 2243 | yang_snodes_iterate(NULL, nb_node_validate, 0, &errors); |
1c2facd1 RW |
2244 | if (errors > 0) { |
2245 | flog_err( | |
2246 | EC_LIB_NB_CBS_VALIDATION, | |
2247 | "%s: failed to validate northbound callbacks: %u error(s)", | |
2248 | __func__, errors); | |
2249 | exit(1); | |
2250 | } | |
59e85ca1 RW |
2251 | } |
2252 | ||
2253 | void nb_load_module(const struct frr_yang_module_info *module_info) | |
2254 | { | |
2255 | struct yang_module *module; | |
1c2facd1 | 2256 | |
59e85ca1 RW |
2257 | DEBUGD(&nb_dbg_events, "northbound: loading %s.yang", |
2258 | module_info->name); | |
2259 | ||
2260 | module = yang_module_load(module_info->name); | |
2261 | yang_snodes_iterate(module->info, nb_node_new_cb, 0, NULL); | |
2262 | nb_load_callbacks(module_info); | |
2263 | } | |
2264 | ||
2265 | void nb_init(struct thread_master *tm, | |
2266 | const struct frr_yang_module_info *const modules[], | |
2267 | size_t nmodules, bool db_enabled) | |
2268 | { | |
390a8862 CS |
2269 | nb_db_enabled = db_enabled; |
2270 | ||
59e85ca1 RW |
2271 | /* Load YANG modules and their corresponding northbound callbacks. */ |
2272 | for (size_t i = 0; i < nmodules; i++) | |
2273 | nb_load_module(modules[i]); | |
2274 | ||
2275 | /* Validate northbound callbacks. */ | |
2276 | nb_validate_callbacks(); | |
2277 | ||
1c2facd1 RW |
2278 | /* Create an empty running configuration. */ |
2279 | running_config = nb_config_new(NULL); | |
ccd43ada RW |
2280 | running_config_entries = hash_create(running_config_entry_key_make, |
2281 | running_config_entry_cmp, | |
2282 | "Running Configuration Entries"); | |
364ad673 | 2283 | pthread_mutex_init(&running_config_mgmt_lock.mtx, NULL); |
1c2facd1 RW |
2284 | |
2285 | /* Initialize the northbound CLI. */ | |
fbdc1c0a | 2286 | nb_cli_init(tm); |
1c2facd1 RW |
2287 | } |
2288 | ||
2289 | void nb_terminate(void) | |
2290 | { | |
2291 | /* Terminate the northbound CLI. */ | |
2292 | nb_cli_terminate(); | |
2293 | ||
2294 | /* Delete all nb_node's from all YANG modules. */ | |
544ca69a | 2295 | nb_nodes_delete(); |
1c2facd1 RW |
2296 | |
2297 | /* Delete the running configuration. */ | |
ccd43ada RW |
2298 | hash_clean(running_config_entries, running_config_entry_free); |
2299 | hash_free(running_config_entries); | |
1c2facd1 | 2300 | nb_config_free(running_config); |
364ad673 | 2301 | pthread_mutex_destroy(&running_config_mgmt_lock.mtx); |
1c2facd1 | 2302 | } |