Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 1 | /** |
| 2 | * @file diff.c |
| 3 | * @author Michal Vasko <mvasko@cesnet.cz> |
| 4 | * @brief diff functions |
| 5 | * |
| 6 | * Copyright (c) 2020 CESNET, z.s.p.o. |
| 7 | * |
| 8 | * This source code is licensed under BSD 3-Clause License (the "License"). |
| 9 | * You may not use this file except in compliance with the License. |
| 10 | * You may obtain a copy of the License at |
| 11 | * |
| 12 | * https://opensource.org/licenses/BSD-3-Clause |
| 13 | */ |
| 14 | #define _XOPEN_SOURCE 500 |
Radek Krejci | 33185cb | 2020-07-11 23:15:22 +0200 | [diff] [blame] | 15 | #define _POSIX_C_SOURCE 200809L |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 16 | |
| 17 | #include "diff.h" |
| 18 | |
| 19 | #include <assert.h> |
| 20 | #include <stddef.h> |
Radek Krejci | 47fab89 | 2020-11-05 17:02:41 +0100 | [diff] [blame] | 21 | #include <stdlib.h> |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 22 | #include <string.h> |
| 23 | |
| 24 | #include "common.h" |
Radek Krejci | 47fab89 | 2020-11-05 17:02:41 +0100 | [diff] [blame] | 25 | #include "context.h" |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 26 | #include "log.h" |
Radek Krejci | 47fab89 | 2020-11-05 17:02:41 +0100 | [diff] [blame] | 27 | #include "plugins_types.h" |
| 28 | #include "set.h" |
| 29 | #include "tree.h" |
| 30 | #include "tree_data.h" |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 31 | #include "tree_data_internal.h" |
| 32 | #include "tree_schema.h" |
| 33 | #include "tree_schema_internal.h" |
| 34 | |
| 35 | static const char * |
| 36 | lyd_diff_op2str(enum lyd_diff_op op) |
| 37 | { |
| 38 | switch (op) { |
| 39 | case LYD_DIFF_OP_CREATE: |
| 40 | return "create"; |
| 41 | case LYD_DIFF_OP_DELETE: |
| 42 | return "delete"; |
| 43 | case LYD_DIFF_OP_REPLACE: |
| 44 | return "replace"; |
| 45 | case LYD_DIFF_OP_NONE: |
| 46 | return "none"; |
| 47 | } |
| 48 | |
| 49 | LOGINT(NULL); |
| 50 | return NULL; |
| 51 | } |
| 52 | |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 53 | static enum lyd_diff_op |
| 54 | lyd_diff_str2op(const char *str) |
| 55 | { |
| 56 | switch (str[0]) { |
| 57 | case 'c': |
| 58 | assert(!strcmp(str, "create")); |
| 59 | return LYD_DIFF_OP_CREATE; |
| 60 | case 'd': |
| 61 | assert(!strcmp(str, "delete")); |
| 62 | return LYD_DIFF_OP_DELETE; |
| 63 | case 'r': |
| 64 | assert(!strcmp(str, "replace")); |
| 65 | return LYD_DIFF_OP_REPLACE; |
| 66 | case 'n': |
| 67 | assert(!strcmp(str, "none")); |
| 68 | return LYD_DIFF_OP_NONE; |
| 69 | } |
| 70 | |
| 71 | LOGINT(NULL); |
| 72 | return 0; |
| 73 | } |
| 74 | |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 75 | LY_ERR |
| 76 | lyd_diff_add(const struct lyd_node *node, enum lyd_diff_op op, const char *orig_default, const char *orig_value, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 77 | const char *key, const char *value, const char *orig_key, struct lyd_node **diff) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 78 | { |
| 79 | struct lyd_node *dup, *siblings, *match = NULL, *diff_parent = NULL; |
| 80 | const struct lyd_node *parent = NULL; |
| 81 | const struct lys_module *yang_mod; |
| 82 | |
| 83 | assert(diff); |
| 84 | |
| 85 | /* find the first existing parent */ |
| 86 | siblings = *diff; |
| 87 | while (1) { |
| 88 | /* find next node parent */ |
| 89 | parent = node; |
| 90 | while (parent->parent && (!diff_parent || (parent->parent->schema != diff_parent->schema))) { |
| 91 | parent = (struct lyd_node *)parent->parent; |
| 92 | } |
| 93 | if (parent == node) { |
| 94 | /* no more parents to find */ |
| 95 | break; |
| 96 | } |
| 97 | |
| 98 | /* check whether it exists in the diff */ |
| 99 | if (lyd_find_sibling_first(siblings, parent, &match)) { |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | /* another parent found */ |
| 104 | diff_parent = match; |
| 105 | |
| 106 | /* move down in the diff */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 107 | siblings = lyd_child_no_keys(match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | /* duplicate the subtree (and connect to the diff if possible) */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 111 | LY_CHECK_RET(lyd_dup_single(node, (struct lyd_node_inner *)diff_parent, |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 112 | LYD_DUP_RECURSIVE | LYD_DUP_NO_META | LYD_DUP_WITH_PARENTS | LYD_DUP_WITH_FLAGS, &dup)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 113 | |
| 114 | /* find the first duplicated parent */ |
| 115 | if (!diff_parent) { |
| 116 | diff_parent = (struct lyd_node *)dup->parent; |
| 117 | while (diff_parent && diff_parent->parent) { |
| 118 | diff_parent = (struct lyd_node *)diff_parent->parent; |
| 119 | } |
| 120 | } else { |
| 121 | diff_parent = (struct lyd_node *)dup; |
| 122 | while (diff_parent->parent && (diff_parent->parent->schema == parent->schema)) { |
| 123 | diff_parent = (struct lyd_node *)diff_parent->parent; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /* no parent existed, must be manually connected */ |
| 128 | if (!diff_parent) { |
| 129 | /* there actually was no parent to duplicate */ |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 130 | lyd_insert_sibling(*diff, dup, diff); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 131 | } else if (!diff_parent->parent) { |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 132 | lyd_insert_sibling(*diff, diff_parent, diff); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /* get module with the operation metadata */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 136 | yang_mod = LYD_CTX(node)->list.objs[1]; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 137 | assert(!strcmp(yang_mod->name, "yang")); |
| 138 | |
| 139 | /* add parent operation, if any */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 140 | if (diff_parent && (diff_parent != dup)) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 141 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), diff_parent, yang_mod, "operation", "none", 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | /* add subtree operation */ |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 145 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "operation", lyd_diff_op2str(op), 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 146 | |
| 147 | /* orig-default */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 148 | if (orig_default) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 149 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "orig-default", orig_default, 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | /* orig-value */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 153 | if (orig_value) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 154 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "orig-value", orig_value, 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | /* key */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 158 | if (key) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 159 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "key", key, 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | /* value */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 163 | if (value) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 164 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "value", value, 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /* orig-key */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 168 | if (orig_key) { |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 169 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(node), dup, yang_mod, "orig-key", orig_key, 0, NULL)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | return LY_SUCCESS; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @brief Get a userord entry for a specific user-ordered list/leaf-list. Create if does not exist yet. |
| 177 | * |
| 178 | * @param[in] first |
| 179 | * @param[in] schema Schema node of the list/leaf-list. |
| 180 | * @param[in,out] userord Sized array of userord items. |
| 181 | * @return Userord item for all the user-ordered list/leaf-list instances. |
| 182 | */ |
| 183 | static struct lyd_diff_userord * |
| 184 | lyd_diff_userord_get(const struct lyd_node *first, const struct lysc_node *schema, struct lyd_diff_userord **userord) |
| 185 | { |
| 186 | struct lyd_diff_userord *item; |
| 187 | const struct lyd_node *iter, **node; |
| 188 | LY_ARRAY_COUNT_TYPE u; |
| 189 | |
| 190 | LY_ARRAY_FOR(*userord, u) { |
| 191 | if ((*userord)[u].schema == schema) { |
| 192 | return &(*userord)[u]; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | /* it was not added yet, add it now */ |
| 197 | LY_ARRAY_NEW_RET(schema->module->ctx, *userord, item, NULL); |
| 198 | |
| 199 | item->schema = schema; |
| 200 | item->pos = 0; |
| 201 | item->inst = NULL; |
| 202 | |
| 203 | /* store all the instance pointers in the current order */ |
| 204 | if (first) { |
| 205 | if (first->parent) { |
| 206 | iter = first->parent->child; |
| 207 | } else { |
Radek Krejci | 1e008d2 | 2020-08-17 11:37:37 +0200 | [diff] [blame] | 208 | for (iter = first; iter->prev->next; iter = iter->prev) {} |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 209 | } |
Michal Vasko | d989ba0 | 2020-08-24 10:59:24 +0200 | [diff] [blame] | 210 | for ( ; iter; iter = iter->next) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 211 | if (iter->schema == first->schema) { |
| 212 | LY_ARRAY_NEW_RET(schema->module->ctx, item->inst, node, NULL); |
| 213 | *node = iter; |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | return item; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * @brief Get all the metadata to be stored in a diff for the 2 nodes. Can be used only for user-ordered |
| 223 | * lists/leaf-lists. |
| 224 | * |
| 225 | * @param[in] first Node from the first tree, can be NULL (on create). |
| 226 | * @param[in] second Node from the second tree, can be NULL (on delete). |
| 227 | * @param[in] options Diff options. |
| 228 | * @param[in,out] userord Sized array of userord items for keeping the current node order. |
| 229 | * @param[out] op Operation. |
| 230 | * @param[out] orig_default Original default metadata. |
| 231 | * @param[out] value Value metadata. |
| 232 | * @param[out] orig_value Original value metadata |
| 233 | * @param[out] key Key metadata. |
| 234 | * @param[out] orig_key Original key metadata. |
| 235 | * @return LY_SUCCESS on success, |
| 236 | * @return LY_ENOT if there is no change to be added into diff, |
| 237 | * @return LY_ERR value on other errors. |
| 238 | */ |
| 239 | static LY_ERR |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 240 | lyd_diff_userord_attrs(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 241 | struct lyd_diff_userord **userord, enum lyd_diff_op *op, const char **orig_default, char **value, |
| 242 | char **orig_value, char **key, char **orig_key) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 243 | { |
| 244 | const struct lysc_node *schema; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 245 | size_t buflen, bufused, first_pos, second_pos; |
| 246 | struct lyd_diff_userord *userord_item; |
| 247 | |
| 248 | assert(first || second); |
| 249 | |
| 250 | *orig_default = NULL; |
| 251 | *value = NULL; |
| 252 | *orig_value = NULL; |
| 253 | *key = NULL; |
| 254 | *orig_key = NULL; |
| 255 | |
| 256 | schema = first ? first->schema : second->schema; |
| 257 | assert(lysc_is_userordered(schema)); |
| 258 | |
| 259 | /* get userord entry */ |
| 260 | userord_item = lyd_diff_userord_get(first, schema, userord); |
| 261 | LY_CHECK_RET(!userord_item, LY_EMEM); |
| 262 | |
| 263 | /* prepare position of the next instance */ |
| 264 | second_pos = userord_item->pos++; |
| 265 | |
| 266 | /* find user-ordered first position */ |
| 267 | if (first) { |
| 268 | for (first_pos = second_pos; first_pos < LY_ARRAY_COUNT(userord_item->inst); ++first_pos) { |
| 269 | if (userord_item->inst[first_pos] == first) { |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | assert(first_pos < LY_ARRAY_COUNT(userord_item->inst)); |
| 274 | } else { |
| 275 | first_pos = 0; |
| 276 | } |
| 277 | |
| 278 | /* learn operation first */ |
| 279 | if (!second) { |
| 280 | *op = LYD_DIFF_OP_DELETE; |
| 281 | } else if (!first) { |
| 282 | *op = LYD_DIFF_OP_CREATE; |
| 283 | } else { |
| 284 | assert(schema->nodetype & (LYS_LIST | LYS_LEAFLIST)); |
Michal Vasko | 8f359bf | 2020-07-28 10:41:15 +0200 | [diff] [blame] | 285 | if (lyd_compare_single(second, userord_item->inst[second_pos], 0)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 286 | /* in first, there is a different instance on the second position, we are going to move 'first' node */ |
| 287 | *op = LYD_DIFF_OP_REPLACE; |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 288 | } else if ((options & LYD_DIFF_DEFAULTS) && ((first->flags & LYD_DEFAULT) != (second->flags & LYD_DEFAULT))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 289 | /* default flag change */ |
| 290 | *op = LYD_DIFF_OP_NONE; |
| 291 | } else { |
| 292 | /* no changes */ |
| 293 | return LY_ENOT; |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * set each attribute correctly based on the operation and node type |
| 299 | */ |
| 300 | |
| 301 | /* orig-default */ |
Michal Vasko | 4b715ca | 2020-11-11 18:39:57 +0100 | [diff] [blame] | 302 | if ((schema->nodetype == LYS_LEAFLIST) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_NONE))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 303 | if (first->flags & LYD_DEFAULT) { |
| 304 | *orig_default = "true"; |
| 305 | } else { |
| 306 | *orig_default = "false"; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | /* value */ |
| 311 | if ((schema->nodetype == LYS_LEAFLIST) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_CREATE))) { |
| 312 | if (second_pos) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 313 | *value = strdup(LYD_CANON_VALUE(userord_item->inst[second_pos - 1])); |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 314 | LY_CHECK_ERR_RET(!*value, LOGMEM(schema->module->ctx), LY_EMEM); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 315 | } else { |
| 316 | *value = strdup(""); |
| 317 | LY_CHECK_ERR_RET(!*value, LOGMEM(schema->module->ctx), LY_EMEM); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /* orig-value */ |
| 322 | if ((schema->nodetype == LYS_LEAFLIST) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_DELETE))) { |
| 323 | if (first_pos) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 324 | *orig_value = strdup(LYD_CANON_VALUE(userord_item->inst[first_pos - 1])); |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 325 | LY_CHECK_ERR_RET(!*orig_value, LOGMEM(schema->module->ctx), LY_EMEM); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 326 | } else { |
| 327 | *orig_value = strdup(""); |
| 328 | LY_CHECK_ERR_RET(!*orig_value, LOGMEM(schema->module->ctx), LY_EMEM); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /* key */ |
Michal Vasko | 44f3d2c | 2020-08-24 09:49:38 +0200 | [diff] [blame] | 333 | if ((schema->nodetype == LYS_LIST) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_CREATE))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 334 | if (second_pos) { |
| 335 | buflen = bufused = 0; |
| 336 | LY_CHECK_RET(lyd_path_list_predicate(userord_item->inst[second_pos - 1], key, &buflen, &bufused, 0)); |
| 337 | } else { |
| 338 | *key = strdup(""); |
| 339 | LY_CHECK_ERR_RET(!*key, LOGMEM(schema->module->ctx), LY_EMEM); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /* orig-key */ |
| 344 | if ((schema->nodetype == LYS_LIST) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_DELETE))) { |
| 345 | if (first_pos) { |
| 346 | buflen = bufused = 0; |
| 347 | LY_CHECK_RET(lyd_path_list_predicate(userord_item->inst[first_pos - 1], orig_key, &buflen, &bufused, 0)); |
| 348 | } else { |
| 349 | *orig_key = strdup(""); |
| 350 | LY_CHECK_ERR_RET(!*orig_key, LOGMEM(schema->module->ctx), LY_EMEM); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * update our instances - apply the change |
| 356 | */ |
| 357 | if (*op == LYD_DIFF_OP_CREATE) { |
| 358 | /* insert the instance */ |
| 359 | LY_ARRAY_RESIZE_ERR_RET(schema->module->ctx, userord_item->inst, LY_ARRAY_COUNT(userord_item->inst) + 1, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 360 | ; , LY_EMEM); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 361 | if (second_pos < LY_ARRAY_COUNT(userord_item->inst)) { |
| 362 | memmove(userord_item->inst + second_pos + 1, userord_item->inst + second_pos, |
| 363 | (LY_ARRAY_COUNT(userord_item->inst) - second_pos) * sizeof *userord_item->inst); |
| 364 | } |
| 365 | LY_ARRAY_INCREMENT(userord_item->inst); |
| 366 | userord_item->inst[second_pos] = second; |
| 367 | |
| 368 | } else if (*op == LYD_DIFF_OP_DELETE) { |
| 369 | /* remove the instance */ |
| 370 | if (first_pos + 1 < LY_ARRAY_COUNT(userord_item->inst)) { |
| 371 | memmove(userord_item->inst + first_pos, userord_item->inst + first_pos + 1, |
| 372 | (LY_ARRAY_COUNT(userord_item->inst) - first_pos - 1) * sizeof *userord_item->inst); |
| 373 | } |
| 374 | LY_ARRAY_DECREMENT(userord_item->inst); |
| 375 | |
| 376 | } else if (*op == LYD_DIFF_OP_REPLACE) { |
| 377 | /* move the instances */ |
| 378 | memmove(userord_item->inst + second_pos + 1, userord_item->inst + second_pos, |
| 379 | (first_pos - second_pos) * sizeof *userord_item->inst); |
| 380 | userord_item->inst[second_pos] = first; |
| 381 | } |
| 382 | |
| 383 | return LY_SUCCESS; |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * @brief Get all the metadata to be stored in a diff for the 2 nodes. Cannot be used for user-ordered |
| 388 | * lists/leaf-lists. |
| 389 | * |
| 390 | * @param[in] first Node from the first tree, can be NULL (on create). |
| 391 | * @param[in] second Node from the second tree, can be NULL (on delete). |
| 392 | * @param[in] options Diff options. |
| 393 | * @param[out] op Operation. |
| 394 | * @param[out] orig_default Original default metadata. |
| 395 | * @param[out] orig_value Original value metadata. |
| 396 | * @return LY_SUCCESS on success, |
| 397 | * @return LY_ENOT if there is no change to be added into diff, |
| 398 | * @return LY_ERR value on other errors. |
| 399 | */ |
| 400 | static LY_ERR |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 401 | lyd_diff_attrs(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, enum lyd_diff_op *op, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 402 | const char **orig_default, char **orig_value) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 403 | { |
| 404 | const struct lysc_node *schema; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 405 | |
| 406 | assert(first || second); |
| 407 | |
| 408 | *orig_default = NULL; |
| 409 | *orig_value = NULL; |
| 410 | |
| 411 | schema = first ? first->schema : second->schema; |
| 412 | assert(!lysc_is_userordered(schema)); |
| 413 | |
| 414 | /* learn operation first */ |
| 415 | if (!second) { |
| 416 | *op = LYD_DIFF_OP_DELETE; |
| 417 | } else if (!first) { |
| 418 | *op = LYD_DIFF_OP_CREATE; |
| 419 | } else { |
| 420 | switch (schema->nodetype) { |
| 421 | case LYS_CONTAINER: |
| 422 | case LYS_RPC: |
| 423 | case LYS_ACTION: |
| 424 | case LYS_NOTIF: |
| 425 | /* no changes */ |
| 426 | return LY_ENOT; |
| 427 | case LYS_LIST: |
| 428 | case LYS_LEAFLIST: |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 429 | if ((options & LYD_DIFF_DEFAULTS) && ((first->flags & LYD_DEFAULT) != (second->flags & LYD_DEFAULT))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 430 | /* default flag change */ |
| 431 | *op = LYD_DIFF_OP_NONE; |
| 432 | } else { |
| 433 | /* no changes */ |
| 434 | return LY_ENOT; |
| 435 | } |
| 436 | break; |
| 437 | case LYS_LEAF: |
| 438 | case LYS_ANYXML: |
| 439 | case LYS_ANYDATA: |
Michal Vasko | 8f359bf | 2020-07-28 10:41:15 +0200 | [diff] [blame] | 440 | if (lyd_compare_single(first, second, 0)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 441 | /* different values */ |
| 442 | *op = LYD_DIFF_OP_REPLACE; |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 443 | } else if ((options & LYD_DIFF_DEFAULTS) && ((first->flags & LYD_DEFAULT) != (second->flags & LYD_DEFAULT))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 444 | /* default flag change */ |
| 445 | *op = LYD_DIFF_OP_NONE; |
| 446 | } else { |
| 447 | /* no changes */ |
| 448 | return LY_ENOT; |
| 449 | } |
| 450 | break; |
| 451 | default: |
| 452 | LOGINT_RET(schema->module->ctx); |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * set each attribute correctly based on the operation and node type |
| 458 | */ |
| 459 | |
| 460 | /* orig-default */ |
Michal Vasko | 4b715ca | 2020-11-11 18:39:57 +0100 | [diff] [blame] | 461 | if ((schema->nodetype & LYD_NODE_TERM) && ((*op == LYD_DIFF_OP_REPLACE) || (*op == LYD_DIFF_OP_NONE))) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 462 | if (first->flags & LYD_DEFAULT) { |
| 463 | *orig_default = "true"; |
| 464 | } else { |
| 465 | *orig_default = "false"; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | /* orig-value */ |
| 470 | if ((schema->nodetype == LYS_LEAF) && (*op == LYD_DIFF_OP_REPLACE)) { |
| 471 | /* leaf */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 472 | *orig_value = strdup(LYD_CANON_VALUE(first)); |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 473 | LY_CHECK_ERR_RET(!*orig_value, LOGMEM(schema->module->ctx), LY_EMEM); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | return LY_SUCCESS; |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * @brief Perform diff for all siblings at certain depth, recursively. |
| 481 | * |
| 482 | * For user-ordered lists/leaf-lists a specific structure is used for storing |
| 483 | * the current order. The idea is to apply all the generated diff changes |
| 484 | * virtually on the first tree so that we can continue to generate correct |
| 485 | * changes after some were already generated. |
| 486 | * |
| 487 | * The algorithm then uses second tree position-based changes with a before |
| 488 | * (preceding) item anchor. |
| 489 | * |
| 490 | * Example: |
| 491 | * |
| 492 | * Virtual first tree leaf-list order: |
| 493 | * 1 2 [3] 4 5 |
| 494 | * |
| 495 | * Second tree leaf-list order: |
| 496 | * 1 2 [5] 3 4 |
| 497 | * |
| 498 | * We are at the 3rd node now. We look at whether the nodes on the 3rd position |
| 499 | * match - they do not - move nodes so that the 3rd position node is final -> |
| 500 | * -> move node 5 to the 3rd position -> move node 5 after node 2. |
| 501 | * |
| 502 | * Required properties: |
| 503 | * Stored operations (move) should not be affected by later operations - |
| 504 | * - would cause a redundantly long list of operations, possibly inifinite. |
| 505 | * |
| 506 | * Implemenation justification: |
| 507 | * First, all delete operations and only then move/create operations are stored. |
| 508 | * Also, preceding anchor is used and after each iteration another node is |
| 509 | * at its final position. That results in the invariant that all preceding |
| 510 | * nodes are final and will not be changed by the later operations, meaning |
| 511 | * they can safely be used as anchors for the later operations. |
| 512 | * |
| 513 | * @param[in] first First tree first sibling. |
| 514 | * @param[in] second Second tree first sibling. |
| 515 | * @param[in] options Diff options. |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 516 | * @param[in] nosiblings Whether to skip following siblings. |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 517 | * @param[in,out] diff Diff to append to. |
| 518 | * @return LY_ERR value. |
| 519 | */ |
| 520 | static LY_ERR |
Radek Krejci | 857189e | 2020-09-01 13:26:36 +0200 | [diff] [blame] | 521 | lyd_diff_siblings_r(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, ly_bool nosiblings, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 522 | struct lyd_node **diff) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 523 | { |
| 524 | LY_ERR ret = LY_SUCCESS; |
| 525 | const struct lyd_node *iter_first, *iter_second; |
| 526 | struct lyd_node *match_second, *match_first; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 527 | struct lyd_diff_userord *userord = NULL; |
| 528 | LY_ARRAY_COUNT_TYPE u; |
| 529 | enum lyd_diff_op op; |
| 530 | const char *orig_default; |
| 531 | char *orig_value, *key, *value, *orig_key; |
| 532 | |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 533 | /* compare first tree to the second tree - delete, replace, none */ |
| 534 | LY_LIST_FOR(first, iter_first) { |
| 535 | assert(!(iter_first->schema->flags & LYS_KEY)); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 536 | if ((iter_first->flags & LYD_DEFAULT) && !(options & LYD_DIFF_DEFAULTS)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 537 | /* skip default nodes */ |
| 538 | continue; |
| 539 | } |
| 540 | |
| 541 | if (iter_first->schema->nodetype & (LYS_LIST | LYS_LEAFLIST)) { |
| 542 | /* try to find the exact instance */ |
| 543 | lyd_find_sibling_first(second, iter_first, &match_second); |
| 544 | } else { |
| 545 | /* try to simply find the node, there cannot be more instances */ |
| 546 | lyd_find_sibling_val(second, iter_first->schema, NULL, 0, &match_second); |
| 547 | } |
| 548 | |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 549 | if (match_second && (match_second->flags & LYD_DEFAULT) && !(options & LYD_DIFF_DEFAULTS)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 550 | /* ignore default nodes */ |
| 551 | match_second = NULL; |
| 552 | } |
| 553 | |
| 554 | if (lysc_is_userordered(iter_first->schema)) { |
| 555 | if (match_second) { |
| 556 | /* we are handling only user-ordered node delete now */ |
| 557 | continue; |
| 558 | } |
| 559 | |
| 560 | /* get all the attributes */ |
| 561 | LY_CHECK_GOTO(lyd_diff_userord_attrs(iter_first, match_second, options, &userord, &op, &orig_default, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 562 | &value, &orig_value, &key, &orig_key), cleanup); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 563 | |
| 564 | /* there must be changes, it is deleted */ |
| 565 | assert(op == LYD_DIFF_OP_DELETE); |
| 566 | ret = lyd_diff_add(iter_first, op, orig_default, orig_value, key, value, orig_key, diff); |
| 567 | |
| 568 | free(orig_value); |
| 569 | free(key); |
| 570 | free(value); |
| 571 | free(orig_key); |
| 572 | LY_CHECK_GOTO(ret, cleanup); |
| 573 | } else { |
| 574 | /* get all the attributes */ |
| 575 | ret = lyd_diff_attrs(iter_first, match_second, options, &op, &orig_default, &orig_value); |
| 576 | |
| 577 | /* add into diff if there are any changes */ |
| 578 | if (!ret) { |
| 579 | if (op == LYD_DIFF_OP_DELETE) { |
| 580 | ret = lyd_diff_add(iter_first, op, orig_default, orig_value, NULL, NULL, NULL, diff); |
| 581 | } else { |
Michal Vasko | 3c2dd6c | 2020-11-06 17:38:55 +0100 | [diff] [blame] | 582 | assert(match_second); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 583 | ret = lyd_diff_add(match_second, op, orig_default, orig_value, NULL, NULL, NULL, diff); |
| 584 | } |
| 585 | |
| 586 | free(orig_value); |
| 587 | LY_CHECK_GOTO(ret, cleanup); |
| 588 | } else if (ret == LY_ENOT) { |
| 589 | ret = LY_SUCCESS; |
| 590 | } else { |
| 591 | goto cleanup; |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | /* check descendants, if any, recursively */ |
| 596 | if (match_second) { |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 597 | LY_CHECK_GOTO(lyd_diff_siblings_r(lyd_child_no_keys(iter_first), lyd_child_no_keys(match_second), options, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 598 | 0, diff), cleanup); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | if (nosiblings) { |
| 602 | break; |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* reset all cached positions */ |
| 607 | LY_ARRAY_FOR(userord, u) { |
| 608 | userord[u].pos = 0; |
| 609 | } |
| 610 | |
| 611 | /* compare second tree to the first tree - create, user-ordered move */ |
| 612 | LY_LIST_FOR(second, iter_second) { |
| 613 | assert(!(iter_second->schema->flags & LYS_KEY)); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 614 | if ((iter_second->flags & LYD_DEFAULT) && !(options & LYD_DIFF_DEFAULTS)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 615 | /* skip default nodes */ |
| 616 | continue; |
| 617 | } |
| 618 | |
| 619 | if (iter_second->schema->nodetype & (LYS_LIST | LYS_LEAFLIST)) { |
| 620 | lyd_find_sibling_first(first, iter_second, &match_first); |
| 621 | } else { |
| 622 | lyd_find_sibling_val(first, iter_second->schema, NULL, 0, &match_first); |
| 623 | } |
| 624 | |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 625 | if (match_first && (match_first->flags & LYD_DEFAULT) && !(options & LYD_DIFF_DEFAULTS)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 626 | /* ignore default nodes */ |
| 627 | match_first = NULL; |
| 628 | } |
| 629 | |
| 630 | if (lysc_is_userordered(iter_second->schema)) { |
| 631 | /* get all the attributes */ |
| 632 | ret = lyd_diff_userord_attrs(match_first, iter_second, options, &userord, &op, &orig_default, |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 633 | &value, &orig_value, &key, &orig_key); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 634 | |
| 635 | /* add into diff if there are any changes */ |
| 636 | if (!ret) { |
| 637 | ret = lyd_diff_add(iter_second, op, orig_default, orig_value, key, value, orig_key, diff); |
| 638 | |
| 639 | free(orig_value); |
| 640 | free(key); |
| 641 | free(value); |
| 642 | free(orig_key); |
| 643 | LY_CHECK_GOTO(ret, cleanup); |
| 644 | } else if (ret == LY_ENOT) { |
| 645 | ret = LY_SUCCESS; |
| 646 | } else { |
| 647 | goto cleanup; |
| 648 | } |
| 649 | } else if (!match_first) { |
| 650 | /* get all the attributes */ |
| 651 | LY_CHECK_GOTO(lyd_diff_attrs(match_first, iter_second, options, &op, &orig_default, &orig_value), cleanup); |
| 652 | |
| 653 | /* there must be changes, it is created */ |
| 654 | assert(op == LYD_DIFF_OP_CREATE); |
| 655 | ret = lyd_diff_add(iter_second, op, orig_default, orig_value, NULL, NULL, NULL, diff); |
| 656 | |
| 657 | free(orig_value); |
| 658 | LY_CHECK_GOTO(ret, cleanup); |
| 659 | } /* else was handled */ |
| 660 | |
| 661 | if (nosiblings) { |
| 662 | break; |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | cleanup: |
| 667 | LY_ARRAY_FOR(userord, u) { |
| 668 | LY_ARRAY_FREE(userord[u].inst); |
| 669 | } |
| 670 | LY_ARRAY_FREE(userord); |
| 671 | return ret; |
| 672 | } |
| 673 | |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 674 | static LY_ERR |
Radek Krejci | 857189e | 2020-09-01 13:26:36 +0200 | [diff] [blame] | 675 | lyd_diff(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, ly_bool nosiblings, struct lyd_node **diff) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 676 | { |
| 677 | const struct ly_ctx *ctx; |
| 678 | |
| 679 | LY_CHECK_ARG_RET(NULL, diff, LY_EINVAL); |
| 680 | |
| 681 | if (first) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 682 | ctx = LYD_CTX(first); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 683 | } else if (second) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 684 | ctx = LYD_CTX(second); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 685 | } else { |
| 686 | ctx = NULL; |
| 687 | } |
| 688 | |
| 689 | if (first && second && (lysc_data_parent(first->schema) != lysc_data_parent(second->schema))) { |
| 690 | LOGERR(ctx, LY_EINVAL, "Invalid arguments - cannot create diff for unrelated data (%s()).", __func__); |
| 691 | return LY_EINVAL; |
| 692 | } |
| 693 | |
| 694 | *diff = NULL; |
| 695 | |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 696 | return lyd_diff_siblings_r(first, second, options, nosiblings, diff); |
| 697 | } |
| 698 | |
| 699 | API LY_ERR |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 700 | lyd_diff_tree(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, struct lyd_node **diff) |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 701 | { |
| 702 | return lyd_diff(first, second, options, 1, diff); |
| 703 | } |
| 704 | |
| 705 | API LY_ERR |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 706 | lyd_diff_siblings(const struct lyd_node *first, const struct lyd_node *second, uint16_t options, struct lyd_node **diff) |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 707 | { |
| 708 | return lyd_diff(first, second, options, 0, diff); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | /** |
| 712 | * @brief Find a matching node in data tree for a diff node. |
| 713 | * |
| 714 | * @param[in] first_node First sibling in the data tree. |
| 715 | * @param[in] diff_node Diff node to match. |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 716 | * @param[out] match_p Matching node, NULL if no found. |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 717 | */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 718 | static void |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 719 | lyd_diff_find_node(const struct lyd_node *first_node, const struct lyd_node *diff_node, struct lyd_node **match_p) |
| 720 | { |
| 721 | if (diff_node->schema->nodetype & (LYS_LIST | LYS_LEAFLIST)) { |
| 722 | /* try to find the exact instance */ |
| 723 | lyd_find_sibling_first(first_node, diff_node, match_p); |
| 724 | } else { |
| 725 | /* try to simply find the node, there cannot be more instances */ |
| 726 | lyd_find_sibling_val(first_node, diff_node->schema, NULL, 0, match_p); |
| 727 | } |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 728 | } |
| 729 | |
| 730 | /** |
| 731 | * @brief Learn operation of a diff node. |
| 732 | * |
| 733 | * @param[in] diff_node Diff node. |
| 734 | * @param[out] op Operation. |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 735 | * @return LY_ERR value. |
| 736 | */ |
| 737 | static LY_ERR |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 738 | lyd_diff_get_op(const struct lyd_node *diff_node, enum lyd_diff_op *op) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 739 | { |
| 740 | struct lyd_meta *meta = NULL; |
| 741 | const struct lyd_node *diff_parent; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 742 | const char *str; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 743 | |
| 744 | for (diff_parent = diff_node; diff_parent; diff_parent = (struct lyd_node *)diff_parent->parent) { |
| 745 | LY_LIST_FOR(diff_parent->meta, meta) { |
| 746 | if (!strcmp(meta->name, "operation") && !strcmp(meta->annotation->module->name, "yang")) { |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 747 | str = meta->value.canonical; |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 748 | if ((str[0] == 'r') && (diff_parent != diff_node)) { |
| 749 | /* we do not care about this operation if it's in our parent */ |
| 750 | continue; |
| 751 | } |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 752 | *op = lyd_diff_str2op(str); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 753 | break; |
| 754 | } |
| 755 | } |
| 756 | if (meta) { |
| 757 | break; |
| 758 | } |
| 759 | } |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 760 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(diff_node)), LY_EINT); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 761 | |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 762 | return LY_SUCCESS; |
| 763 | } |
| 764 | |
| 765 | /** |
| 766 | * @brief Insert a diff node into a data tree. |
| 767 | * |
| 768 | * @param[in,out] first_node First sibling of the data tree. |
| 769 | * @param[in] parent_node Data tree sibling parent node. |
| 770 | * @param[in] new_node Node to insert. |
| 771 | * @param[in] keys_or_value Optional predicate of relative (leaf-)list instance. If not set, the user-ordered |
| 772 | * instance will be inserted at the first position. |
| 773 | * @return err_info, NULL on success. |
| 774 | */ |
| 775 | static LY_ERR |
| 776 | lyd_diff_insert(struct lyd_node **first_node, struct lyd_node *parent_node, struct lyd_node *new_node, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 777 | const char *key_or_value) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 778 | { |
| 779 | LY_ERR ret; |
| 780 | struct lyd_node *anchor; |
| 781 | |
| 782 | assert(new_node); |
| 783 | |
| 784 | if (!*first_node) { |
| 785 | if (!parent_node) { |
| 786 | /* no parent or siblings */ |
| 787 | *first_node = new_node; |
| 788 | return LY_SUCCESS; |
| 789 | } |
| 790 | |
| 791 | /* simply insert into parent, no other children */ |
| 792 | if (key_or_value) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 793 | LOGERR(LYD_CTX(new_node), LY_EINVAL, "Node \"%s\" instance to insert next to not found.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 794 | new_node->schema->name); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 795 | return LY_EINVAL; |
| 796 | } |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 797 | return lyd_insert_child(parent_node, new_node); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | assert(!(*first_node)->parent || ((struct lyd_node *)(*first_node)->parent == parent_node)); |
| 801 | |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 802 | if (!lysc_is_userordered(new_node->schema)) { |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 803 | /* simple insert */ |
| 804 | return lyd_insert_sibling(*first_node, new_node, first_node); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | if (key_or_value) { |
| 808 | /* find the anchor sibling */ |
| 809 | ret = lyd_find_sibling_val(*first_node, new_node->schema, key_or_value, 0, &anchor); |
| 810 | if (ret == LY_ENOTFOUND) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 811 | LOGERR(LYD_CTX(new_node), LY_EINVAL, "Node \"%s\" instance to insert next to not found.", |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 812 | new_node->schema->name); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 813 | return LY_EINVAL; |
| 814 | } else if (ret) { |
| 815 | return ret; |
| 816 | } |
| 817 | |
| 818 | /* insert after */ |
| 819 | LY_CHECK_RET(lyd_insert_after(anchor, new_node)); |
| 820 | assert(new_node->prev == anchor); |
| 821 | if (*first_node == new_node) { |
| 822 | *first_node = anchor; |
| 823 | } |
| 824 | } else { |
| 825 | if ((*first_node)->schema->flags & LYS_KEY) { |
| 826 | assert(parent_node && (parent_node->schema->nodetype == LYS_LIST)); |
| 827 | |
| 828 | /* find last key */ |
| 829 | anchor = *first_node; |
| 830 | while (anchor->next && (anchor->next->schema->flags & LYS_KEY)) { |
| 831 | anchor = anchor->next; |
| 832 | } |
| 833 | /* insert after the last key */ |
| 834 | LY_CHECK_RET(lyd_insert_after(anchor, new_node)); |
| 835 | } else { |
| 836 | /* insert at the beginning */ |
| 837 | LY_CHECK_RET(lyd_insert_before(*first_node, new_node)); |
| 838 | *first_node = new_node; |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | return LY_SUCCESS; |
| 843 | } |
| 844 | |
| 845 | /** |
| 846 | * @brief Apply diff subtree on data tree nodes, recursively. |
| 847 | * |
| 848 | * @param[in,out] first_node First sibling of the data tree. |
| 849 | * @param[in] parent_node Parent of the first sibling. |
| 850 | * @param[in] diff_node Current diff node. |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 851 | * @param[in] diff_cb Optional diff callback. |
| 852 | * @param[in] cb_data User data for @p diff_cb. |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 853 | * @return LY_ERR value. |
| 854 | */ |
| 855 | static LY_ERR |
| 856 | lyd_diff_apply_r(struct lyd_node **first_node, struct lyd_node *parent_node, const struct lyd_node *diff_node, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 857 | lyd_diff_cb diff_cb, void *cb_data) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 858 | { |
| 859 | LY_ERR ret; |
| 860 | struct lyd_node *match, *diff_child; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 861 | const char *str_val; |
| 862 | enum lyd_diff_op op; |
| 863 | struct lyd_meta *meta; |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 864 | const struct ly_ctx *ctx = LYD_CTX(diff_node); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 865 | |
| 866 | /* read all the valid attributes */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 867 | LY_CHECK_RET(lyd_diff_get_op(diff_node, &op)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 868 | |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 869 | /* handle specific user-ordered (leaf-)lists operations separately */ |
| 870 | if (lysc_is_userordered(diff_node->schema) && ((op == LYD_DIFF_OP_CREATE) || (op == LYD_DIFF_OP_REPLACE))) { |
| 871 | if (op == LYD_DIFF_OP_REPLACE) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 872 | /* find the node (we must have some siblings because the node was only moved) */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 873 | lyd_diff_find_node(*first_node, diff_node, &match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 874 | } else { |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 875 | /* duplicate the node */ |
| 876 | LY_CHECK_RET(lyd_dup_single(diff_node, NULL, LYD_DUP_NO_META, &match)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 877 | } |
| 878 | |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 879 | /* get "key" or "value" metadata string value */ |
| 880 | meta = lyd_find_meta(diff_node->meta, NULL, diff_node->schema->nodetype == LYS_LIST ? "yang:key" : "yang:value"); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 881 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(diff_node)), LY_EINT); |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 882 | str_val = meta->value.canonical; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 883 | |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 884 | /* insert/move the node */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 885 | if (str_val[0]) { |
| 886 | ret = lyd_diff_insert(first_node, parent_node, match, str_val); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 887 | } else { |
| 888 | ret = lyd_diff_insert(first_node, parent_node, match, NULL); |
| 889 | } |
| 890 | if (ret) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 891 | if (op == LYD_DIFF_OP_CREATE) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 892 | lyd_free_tree(match); |
| 893 | } |
| 894 | return ret; |
| 895 | } |
| 896 | |
| 897 | goto next_iter_r; |
| 898 | } |
| 899 | |
| 900 | /* apply operation */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 901 | switch (op) { |
| 902 | case LYD_DIFF_OP_NONE: |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 903 | /* find the node */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 904 | lyd_diff_find_node(*first_node, diff_node, &match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 905 | |
| 906 | if (match->schema->nodetype & LYD_NODE_TERM) { |
| 907 | /* special case of only dflt flag change */ |
| 908 | if (diff_node->flags & LYD_DEFAULT) { |
| 909 | match->flags |= LYD_DEFAULT; |
| 910 | } else { |
| 911 | match->flags &= ~LYD_DEFAULT; |
| 912 | } |
| 913 | } else { |
| 914 | /* none operation on nodes without children is redundant and hence forbidden */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 915 | if (!lyd_child_no_keys(diff_node)) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 916 | LOGINT_RET(ctx); |
| 917 | } |
| 918 | } |
| 919 | break; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 920 | case LYD_DIFF_OP_CREATE: |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 921 | /* duplicate the node */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 922 | LY_CHECK_RET(lyd_dup_single(diff_node, NULL, LYD_DUP_NO_META, &match)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 923 | |
| 924 | /* insert it at the end */ |
| 925 | ret = 0; |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 926 | if (parent_node) { |
| 927 | ret = lyd_insert_child(parent_node, match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 928 | } else { |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 929 | ret = lyd_insert_sibling(*first_node, match, first_node); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 930 | } |
| 931 | if (ret) { |
| 932 | lyd_free_tree(match); |
| 933 | return ret; |
| 934 | } |
| 935 | |
| 936 | break; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 937 | case LYD_DIFF_OP_DELETE: |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 938 | /* find the node */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 939 | lyd_diff_find_node(*first_node, diff_node, &match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 940 | |
| 941 | /* remove it */ |
| 942 | if ((match == *first_node) && !match->parent) { |
| 943 | assert(!parent_node); |
| 944 | /* we have removed the top-level node */ |
| 945 | *first_node = (*first_node)->next; |
| 946 | } |
| 947 | lyd_free_tree(match); |
| 948 | |
| 949 | /* we are not going recursively in this case, the whole subtree was already deleted */ |
| 950 | return LY_SUCCESS; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 951 | case LYD_DIFF_OP_REPLACE: |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 952 | LY_CHECK_ERR_RET(diff_node->schema->nodetype != LYS_LEAF, LOGINT(ctx), LY_EINT); |
| 953 | |
| 954 | /* find the node */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 955 | lyd_diff_find_node(*first_node, diff_node, &match); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 956 | |
| 957 | /* update its value */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 958 | ret = lyd_change_term(match, LYD_CANON_VALUE(diff_node)); |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 959 | if (ret && (ret != LY_EEXIST)) { |
| 960 | LOGINT_RET(ctx); |
| 961 | } |
| 962 | |
| 963 | /* with flags */ |
| 964 | match->flags = diff_node->flags; |
| 965 | break; |
| 966 | default: |
| 967 | LOGINT_RET(ctx); |
| 968 | } |
| 969 | |
| 970 | next_iter_r: |
| 971 | if (diff_cb) { |
| 972 | /* call callback */ |
| 973 | LY_CHECK_RET(diff_cb(diff_node, match, cb_data)); |
| 974 | } |
| 975 | |
| 976 | /* apply diff recursively */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 977 | LY_LIST_FOR(lyd_child_no_keys(diff_node), diff_child) { |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 978 | LY_CHECK_RET(lyd_diff_apply_r(lyd_node_children_p(match), match, diff_child, diff_cb, cb_data)); |
| 979 | } |
| 980 | |
| 981 | return LY_SUCCESS; |
| 982 | } |
| 983 | |
| 984 | API LY_ERR |
| 985 | lyd_diff_apply_module(struct lyd_node **data, const struct lyd_node *diff, const struct lys_module *mod, |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 986 | lyd_diff_cb diff_cb, void *cb_data) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 987 | { |
| 988 | const struct lyd_node *root; |
| 989 | |
| 990 | LY_LIST_FOR(diff, root) { |
| 991 | if (mod && (lyd_owner_module(root) != mod)) { |
| 992 | /* skip data nodes from different modules */ |
| 993 | continue; |
| 994 | } |
| 995 | |
| 996 | /* apply relevant nodes from the diff datatree */ |
| 997 | LY_CHECK_RET(lyd_diff_apply_r(data, NULL, root, diff_cb, cb_data)); |
| 998 | } |
| 999 | |
| 1000 | return LY_SUCCESS; |
| 1001 | } |
| 1002 | |
| 1003 | API LY_ERR |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1004 | lyd_diff_apply_all(struct lyd_node **data, const struct lyd_node *diff) |
Michal Vasko | d59035b | 2020-07-08 12:00:06 +0200 | [diff] [blame] | 1005 | { |
| 1006 | return lyd_diff_apply_module(data, diff, NULL, NULL, NULL); |
| 1007 | } |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1008 | |
| 1009 | /** |
| 1010 | * @brief Update operations on a diff node when the new operation is NONE. |
| 1011 | * |
| 1012 | * @param[in] diff_match Node from the diff. |
| 1013 | * @param[in] cur_op Current operation of the diff node. |
| 1014 | * @param[in] src_diff Current source diff node. |
| 1015 | * @return LY_ERR value. |
| 1016 | */ |
| 1017 | static LY_ERR |
| 1018 | lyd_diff_merge_none(struct lyd_node *diff_match, enum lyd_diff_op cur_op, const struct lyd_node *src_diff) |
| 1019 | { |
| 1020 | switch (cur_op) { |
| 1021 | case LYD_DIFF_OP_NONE: |
| 1022 | case LYD_DIFF_OP_CREATE: |
| 1023 | case LYD_DIFF_OP_REPLACE: |
| 1024 | if (src_diff->schema->nodetype & LYD_NODE_TERM) { |
| 1025 | /* NONE on a term means only its dflt flag was changed */ |
| 1026 | diff_match->flags &= ~LYD_DEFAULT; |
| 1027 | diff_match->flags |= src_diff->flags & LYD_DEFAULT; |
| 1028 | } |
| 1029 | break; |
| 1030 | default: |
| 1031 | /* delete operation is not valid */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1032 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1033 | } |
| 1034 | |
| 1035 | return LY_SUCCESS; |
| 1036 | } |
| 1037 | |
| 1038 | /** |
| 1039 | * @brief Remove an attribute from a node. |
| 1040 | * |
| 1041 | * @param[in] node Node with the metadata. |
| 1042 | * @param[in] name Metadata name. |
| 1043 | */ |
| 1044 | static void |
| 1045 | lyd_diff_del_meta(struct lyd_node *node, const char *name) |
| 1046 | { |
| 1047 | struct lyd_meta *meta; |
| 1048 | |
| 1049 | LY_LIST_FOR(node->meta, meta) { |
| 1050 | if (!strcmp(meta->name, name) && !strcmp(meta->annotation->module->name, "yang")) { |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1051 | lyd_free_meta_single(meta); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1052 | return; |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | assert(0); |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * @brief Set a specific operation of a node. Delete the previous operation, if any. |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1061 | * Does not change the default flag. |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1062 | * |
| 1063 | * @param[in] node Node to change. |
| 1064 | * @param[in] op Operation to set. |
| 1065 | * @return LY_ERR value. |
| 1066 | */ |
| 1067 | static LY_ERR |
| 1068 | lyd_diff_change_op(struct lyd_node *node, enum lyd_diff_op op) |
| 1069 | { |
| 1070 | struct lyd_meta *meta; |
| 1071 | |
| 1072 | LY_LIST_FOR(node->meta, meta) { |
| 1073 | if (!strcmp(meta->name, "operation") && !strcmp(meta->annotation->module->name, "yang")) { |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1074 | lyd_free_meta_single(meta); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1075 | break; |
| 1076 | } |
| 1077 | } |
| 1078 | |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1079 | return lyd_new_meta(LYD_CTX(node), node, NULL, "yang:operation", lyd_diff_op2str(op), 0, NULL); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | /** |
| 1083 | * @brief Update operations on a diff node when the new operation is REPLACE. |
| 1084 | * |
| 1085 | * @param[in] diff_match Node from the diff. |
| 1086 | * @param[in] cur_op Current operation of the diff node. |
| 1087 | * @param[in] src_diff Current source diff node. |
| 1088 | * @return LY_ERR value. |
| 1089 | */ |
| 1090 | static LY_ERR |
| 1091 | lyd_diff_merge_replace(struct lyd_node *diff_match, enum lyd_diff_op cur_op, const struct lyd_node *src_diff) |
| 1092 | { |
| 1093 | LY_ERR ret; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1094 | const char *str_val, *meta_name; |
| 1095 | struct lyd_meta *meta; |
| 1096 | const struct lys_module *mod; |
| 1097 | const struct lyd_node_any *any; |
| 1098 | |
| 1099 | /* get "yang" module for the metadata */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1100 | mod = ly_ctx_get_module_latest(LYD_CTX(diff_match), "yang"); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1101 | assert(mod); |
| 1102 | |
| 1103 | switch (cur_op) { |
| 1104 | case LYD_DIFF_OP_REPLACE: |
| 1105 | case LYD_DIFF_OP_CREATE: |
| 1106 | switch (diff_match->schema->nodetype) { |
| 1107 | case LYS_LIST: |
| 1108 | case LYS_LEAFLIST: |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1109 | /* it was created/moved somewhere, but now it will be created/moved somewhere else, |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1110 | * keep orig_key/orig_value (only replace oper) and replace key/value */ |
| 1111 | assert(lysc_is_userordered(diff_match->schema)); |
| 1112 | meta_name = (diff_match->schema->nodetype == LYS_LIST ? "key" : "value"); |
| 1113 | |
| 1114 | lyd_diff_del_meta(diff_match, meta_name); |
| 1115 | meta = lyd_find_meta(src_diff->meta, mod, meta_name); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1116 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(src_diff)), LY_EINT); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1117 | LY_CHECK_RET(lyd_dup_meta_single(meta, diff_match, NULL)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1118 | break; |
| 1119 | case LYS_LEAF: |
| 1120 | /* replaced with the exact same value, impossible */ |
Michal Vasko | 8f359bf | 2020-07-28 10:41:15 +0200 | [diff] [blame] | 1121 | if (!lyd_compare_single(diff_match, src_diff, 0)) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1122 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1123 | } |
| 1124 | |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1125 | /* modify the node value */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1126 | if (lyd_change_term(diff_match, LYD_CANON_VALUE(src_diff))) { |
| 1127 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1128 | } |
| 1129 | |
Michal Vasko | 8caadab | 2020-11-05 17:38:15 +0100 | [diff] [blame] | 1130 | if (cur_op == LYD_DIFF_OP_REPLACE) { |
| 1131 | /* compare values whether there is any change at all */ |
| 1132 | meta = lyd_find_meta(diff_match->meta, mod, "orig-value"); |
| 1133 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(diff_match)), LY_EINT); |
| 1134 | str_val = meta->value.canonical; |
| 1135 | ret = lyd_value_compare((struct lyd_node_term *)diff_match, str_val, strlen(str_val)); |
| 1136 | if (!ret) { |
| 1137 | /* values are the same, remove orig-value meta and set oper to NONE */ |
| 1138 | lyd_free_meta_single(meta); |
| 1139 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_NONE)); |
| 1140 | } |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | /* modify the default flag */ |
| 1144 | diff_match->flags &= ~LYD_DEFAULT; |
| 1145 | diff_match->flags |= src_diff->flags & LYD_DEFAULT; |
| 1146 | break; |
| 1147 | case LYS_ANYXML: |
| 1148 | case LYS_ANYDATA: |
Michal Vasko | 8f359bf | 2020-07-28 10:41:15 +0200 | [diff] [blame] | 1149 | if (!lyd_compare_single(diff_match, src_diff, 0)) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1150 | /* replaced with the exact same value, impossible */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1151 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | /* modify the node value */ |
| 1155 | any = (struct lyd_node_any *)src_diff; |
| 1156 | LY_CHECK_RET(lyd_any_copy_value(diff_match, &any->value, any->value_type)); |
| 1157 | break; |
| 1158 | default: |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1159 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1160 | } |
| 1161 | break; |
| 1162 | case LYD_DIFF_OP_NONE: |
| 1163 | /* it is moved now */ |
| 1164 | assert(lysc_is_userordered(diff_match->schema) && (diff_match->schema->nodetype == LYS_LIST)); |
| 1165 | |
| 1166 | /* change the operation */ |
| 1167 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_REPLACE)); |
| 1168 | |
| 1169 | /* set orig-key and key metadata */ |
| 1170 | meta = lyd_find_meta(src_diff->meta, mod, "orig-key"); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1171 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(src_diff)), LY_EINT); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1172 | LY_CHECK_RET(lyd_dup_meta_single(meta, diff_match, NULL)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1173 | |
| 1174 | meta = lyd_find_meta(src_diff->meta, mod, "key"); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1175 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(src_diff)), LY_EINT); |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1176 | LY_CHECK_RET(lyd_dup_meta_single(meta, diff_match, NULL)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1177 | break; |
| 1178 | default: |
| 1179 | /* delete operation is not valid */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1180 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1181 | } |
| 1182 | |
| 1183 | return LY_SUCCESS; |
| 1184 | } |
| 1185 | |
| 1186 | /** |
| 1187 | * @brief Update operations in a diff node when the new operation is CREATE. |
| 1188 | * |
| 1189 | * @param[in] diff_match Node from the diff. |
| 1190 | * @param[in] cur_op Current operation of the diff node. |
| 1191 | * @param[in] src_diff Current source diff node. |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1192 | * @param[in] options Diff merge options. |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1193 | * @return LY_ERR value. |
| 1194 | */ |
| 1195 | static LY_ERR |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1196 | lyd_diff_merge_create(struct lyd_node *diff_match, enum lyd_diff_op cur_op, const struct lyd_node *src_diff, uint16_t options) |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1197 | { |
| 1198 | struct lyd_node *child; |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1199 | const struct lysc_node_leaf *sleaf = NULL; |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1200 | uint32_t trg_flags; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1201 | |
| 1202 | switch (cur_op) { |
| 1203 | case LYD_DIFF_OP_DELETE: |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1204 | if ((options & LYD_DIFF_MERGE_DEFAULTS) && (diff_match->schema->nodetype == LYS_LEAF)) { |
| 1205 | /* we are dealing with a leaf and are handling default values specially (as explicit nodes) */ |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1206 | sleaf = (struct lysc_node_leaf *)diff_match->schema; |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1207 | } |
| 1208 | |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1209 | /* remember current flags */ |
| 1210 | trg_flags = diff_match->flags; |
| 1211 | |
Michal Vasko | 6973015 | 2020-10-09 16:30:07 +0200 | [diff] [blame] | 1212 | if (sleaf && sleaf->dflt && |
| 1213 | !sleaf->dflt->realtype->plugin->compare(sleaf->dflt, &((struct lyd_node_term *)src_diff)->value)) { |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1214 | /* we deleted it, so a default value was in-use, and it matches the created value -> operation NONE */ |
| 1215 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_NONE)); |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1216 | } else if (!lyd_compare_single(diff_match, src_diff, 0)) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1217 | /* deleted + created -> operation NONE */ |
| 1218 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_NONE)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1219 | } else { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1220 | /* we deleted it, but it was created with a different value -> operation REPLACE */ |
| 1221 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_REPLACE)); |
| 1222 | |
| 1223 | /* current value is the previous one (meta) */ |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1224 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(src_diff), diff_match, NULL, "yang:orig-value", |
| 1225 | LYD_CANON_VALUE(diff_match), 0, NULL)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1226 | |
| 1227 | /* update the value itself */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1228 | LY_CHECK_RET(lyd_change_term(diff_match, LYD_CANON_VALUE(src_diff))); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | if (diff_match->schema->nodetype & LYD_NODE_TERM) { |
Michal Vasko | 4b715ca | 2020-11-11 18:39:57 +0100 | [diff] [blame] | 1232 | /* add orig-dflt metadata */ |
| 1233 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(src_diff), diff_match, NULL, "yang:orig-default", |
| 1234 | trg_flags & LYD_DEFAULT ? "true" : "false", 0, NULL)); |
| 1235 | |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1236 | /* update dflt flag itself */ |
| 1237 | diff_match->flags &= ~LYD_DEFAULT; |
| 1238 | diff_match->flags |= src_diff->flags & LYD_DEFAULT; |
| 1239 | } else { |
| 1240 | /* but the operation of its children should remain DELETE */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1241 | LY_LIST_FOR(lyd_child_no_keys(diff_match), child) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1242 | LY_CHECK_RET(lyd_diff_change_op(child, LYD_DIFF_OP_DELETE)); |
| 1243 | } |
| 1244 | } |
| 1245 | break; |
| 1246 | default: |
| 1247 | /* create and replace operations are not valid */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1248 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1249 | } |
| 1250 | |
| 1251 | return LY_SUCCESS; |
| 1252 | } |
| 1253 | |
| 1254 | /** |
| 1255 | * @brief Update operations on a diff node when the new operation is DELETE. |
| 1256 | * |
| 1257 | * @param[in] diff_match Node from the diff. |
| 1258 | * @param[in] cur_op Current operation of the diff node. |
| 1259 | * @param[in] src_diff Current source diff node. |
| 1260 | * @return LY_ERR value. |
| 1261 | */ |
| 1262 | static LY_ERR |
| 1263 | lyd_diff_merge_delete(struct lyd_node *diff_match, enum lyd_diff_op cur_op, const struct lyd_node *src_diff) |
| 1264 | { |
| 1265 | struct lyd_node *next, *child; |
| 1266 | |
| 1267 | /* we can delete only exact existing nodes */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1268 | LY_CHECK_ERR_RET(lyd_compare_single(diff_match, src_diff, 0), LOGINT(LYD_CTX(src_diff)), LY_EINT); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1269 | |
| 1270 | switch (cur_op) { |
| 1271 | case LYD_DIFF_OP_CREATE: |
| 1272 | /* it was created, but then deleted -> set NONE operation */ |
| 1273 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_NONE)); |
| 1274 | |
| 1275 | if (diff_match->schema->nodetype & LYD_NODE_TERM) { |
| 1276 | /* add orig-default meta because it is expected */ |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1277 | LY_CHECK_RET(lyd_new_meta(LYD_CTX(src_diff), diff_match, NULL, "yang:orig-default", |
| 1278 | diff_match->flags & LYD_DEFAULT ? "true" : "false", 0, NULL)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1279 | } else { |
| 1280 | /* keep operation for all descendants (for now) */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1281 | LY_LIST_FOR(lyd_child_no_keys(diff_match), child) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1282 | LY_CHECK_RET(lyd_diff_change_op(child, cur_op)); |
| 1283 | } |
| 1284 | } |
| 1285 | break; |
| 1286 | case LYD_DIFF_OP_REPLACE: |
| 1287 | /* similar to none operation but also remove the redundant attribute */ |
| 1288 | lyd_diff_del_meta(diff_match, "orig-value"); |
Radek Krejci | 0f96988 | 2020-08-21 16:56:47 +0200 | [diff] [blame] | 1289 | /* fallthrough */ |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1290 | case LYD_DIFF_OP_NONE: |
| 1291 | /* it was not modified, but should be deleted -> set DELETE operation */ |
| 1292 | LY_CHECK_RET(lyd_diff_change_op(diff_match, LYD_DIFF_OP_DELETE)); |
| 1293 | |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1294 | /* all descendants not in the diff will be deleted and redundant in the diff, so remove them */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1295 | LY_LIST_FOR_SAFE(lyd_child_no_keys(diff_match), next, child) { |
| 1296 | if (lyd_find_sibling_first(lyd_child(src_diff), child, NULL) == LY_ENOTFOUND) { |
Michal Vasko | 5632e0d | 2020-07-31 14:13:37 +0200 | [diff] [blame] | 1297 | lyd_free_tree(child); |
| 1298 | } |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1299 | } |
| 1300 | break; |
| 1301 | default: |
| 1302 | /* delete operation is not valid */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1303 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | return LY_SUCCESS; |
| 1307 | } |
| 1308 | |
| 1309 | /** |
| 1310 | * @brief Check whether this diff node is redundant (does not change data). |
| 1311 | * |
| 1312 | * @param[in] diff Diff node. |
| 1313 | * @return 0 if not, non-zero if it is. |
| 1314 | */ |
| 1315 | static int |
| 1316 | lyd_diff_is_redundant(struct lyd_node *diff) |
| 1317 | { |
| 1318 | enum lyd_diff_op op; |
| 1319 | struct lyd_meta *meta, *orig_val_meta = NULL, *val_meta = NULL; |
| 1320 | struct lyd_node *child; |
| 1321 | const struct lys_module *mod; |
| 1322 | const char *str; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1323 | |
| 1324 | assert(diff); |
| 1325 | |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1326 | child = lyd_child_no_keys(diff); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1327 | mod = ly_ctx_get_module_latest(LYD_CTX(diff), "yang"); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1328 | assert(mod); |
| 1329 | |
| 1330 | /* get node operation */ |
Michal Vasko | 53bf6f2 | 2020-07-14 08:23:40 +0200 | [diff] [blame] | 1331 | LY_CHECK_RET(lyd_diff_get_op(diff, &op), 0); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1332 | |
| 1333 | if ((op == LYD_DIFF_OP_REPLACE) && lysc_is_userordered(diff->schema)) { |
| 1334 | /* check for redundant move */ |
| 1335 | orig_val_meta = lyd_find_meta(diff->meta, mod, (diff->schema->nodetype == LYS_LIST ? "orig-key" : "orig-value")); |
| 1336 | val_meta = lyd_find_meta(diff->meta, mod, (diff->schema->nodetype == LYS_LIST ? "key" : "value")); |
| 1337 | assert(orig_val_meta && val_meta); |
| 1338 | |
| 1339 | if (!lyd_compare_meta(orig_val_meta, val_meta)) { |
| 1340 | /* there is actually no move */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1341 | lyd_free_meta_single(orig_val_meta); |
| 1342 | lyd_free_meta_single(val_meta); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1343 | if (child) { |
| 1344 | /* change operation to NONE, we have siblings */ |
| 1345 | lyd_diff_change_op(diff, LYD_DIFF_OP_NONE); |
| 1346 | return 0; |
| 1347 | } |
| 1348 | |
| 1349 | /* redundant node, BUT !! |
| 1350 | * In diff the move operation is always converted to be INSERT_AFTER, which is fine |
| 1351 | * because the data that this is applied on should not change for the diff lifetime. |
| 1352 | * However, when we are merging 2 diffs, this conversion is actually lossy because |
| 1353 | * if the data change, the move operation can also change its meaning. In this specific |
| 1354 | * case the move operation will be lost. But it can be considered a feature, it is not supported. |
| 1355 | */ |
| 1356 | return 1; |
| 1357 | } |
| 1358 | } else if ((op == LYD_DIFF_OP_NONE) && (diff->schema->nodetype & LYD_NODE_TERM)) { |
| 1359 | /* check whether at least the default flags are different */ |
| 1360 | meta = lyd_find_meta(diff->meta, mod, "orig-default"); |
| 1361 | assert(meta); |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1362 | str = meta->value.canonical; |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1363 | |
| 1364 | /* if previous and current dflt flags are the same, this node is redundant */ |
| 1365 | if ((!strcmp(str, "true") && (diff->flags & LYD_DEFAULT)) || (!strcmp(str, "false") && !(diff->flags & LYD_DEFAULT))) { |
| 1366 | return 1; |
| 1367 | } |
| 1368 | return 0; |
| 1369 | } |
| 1370 | |
| 1371 | if (!child && (op == LYD_DIFF_OP_NONE)) { |
| 1372 | return 1; |
| 1373 | } |
| 1374 | |
| 1375 | return 0; |
| 1376 | } |
| 1377 | |
| 1378 | /** |
| 1379 | * @brief Merge sysrepo diff with another diff, recursively. |
| 1380 | * |
| 1381 | * @param[in] src_diff Source diff node. |
| 1382 | * @param[in] diff_parent Current sysrepo diff parent. |
| 1383 | * @param[in] diff_cb Optional diff callback. |
| 1384 | * @param[in] cb_data User data for @p diff_cb. |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1385 | * @param[in] options Diff merge options. |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1386 | * @param[in,out] diff Diff root node. |
| 1387 | * @return LY_ERR value. |
| 1388 | */ |
| 1389 | static LY_ERR |
| 1390 | lyd_diff_merge_r(const struct lyd_node *src_diff, struct lyd_node *diff_parent, lyd_diff_cb diff_cb, void *cb_data, |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1391 | uint16_t options, struct lyd_node **diff) |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1392 | { |
| 1393 | LY_ERR ret = LY_SUCCESS; |
| 1394 | struct lyd_node *child, *diff_node = NULL; |
| 1395 | enum lyd_diff_op src_op, cur_op; |
| 1396 | |
| 1397 | /* get source node operation */ |
| 1398 | LY_CHECK_RET(lyd_diff_get_op(src_diff, &src_op)); |
| 1399 | |
| 1400 | /* find an equal node in the current diff */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1401 | lyd_diff_find_node(diff_parent ? lyd_child_no_keys(diff_parent) : *diff, src_diff, &diff_node); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1402 | |
| 1403 | if (diff_node) { |
| 1404 | /* get target (current) operation */ |
| 1405 | LY_CHECK_RET(lyd_diff_get_op(diff_node, &cur_op)); |
| 1406 | |
| 1407 | /* merge operations */ |
| 1408 | switch (src_op) { |
| 1409 | case LYD_DIFF_OP_REPLACE: |
| 1410 | ret = lyd_diff_merge_replace(diff_node, cur_op, src_diff); |
| 1411 | break; |
| 1412 | case LYD_DIFF_OP_CREATE: |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1413 | ret = lyd_diff_merge_create(diff_node, cur_op, src_diff, options); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1414 | break; |
| 1415 | case LYD_DIFF_OP_DELETE: |
| 1416 | ret = lyd_diff_merge_delete(diff_node, cur_op, src_diff); |
| 1417 | break; |
| 1418 | case LYD_DIFF_OP_NONE: |
| 1419 | ret = lyd_diff_merge_none(diff_node, cur_op, src_diff); |
| 1420 | break; |
| 1421 | default: |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1422 | LOGINT_RET(LYD_CTX(src_diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1423 | } |
| 1424 | if (ret) { |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1425 | LOGERR(LYD_CTX(src_diff), LY_EOTHER, "Merging operation \"%s\" failed.", lyd_diff_op2str(src_op)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1426 | return ret; |
| 1427 | } |
| 1428 | |
| 1429 | if (diff_cb) { |
| 1430 | /* call callback */ |
Michal Vasko | bc5fba9 | 2020-08-07 12:14:39 +0200 | [diff] [blame] | 1431 | LY_CHECK_RET(diff_cb(src_diff, diff_node, cb_data)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1432 | } |
| 1433 | |
| 1434 | /* update diff parent */ |
| 1435 | diff_parent = diff_node; |
| 1436 | |
| 1437 | /* merge src_diff recursively */ |
Radek Krejci | a1c1e54 | 2020-09-29 16:06:52 +0200 | [diff] [blame] | 1438 | LY_LIST_FOR(lyd_child_no_keys(src_diff), child) { |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1439 | LY_CHECK_RET(lyd_diff_merge_r(child, diff_parent, diff_cb, cb_data, options, diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1440 | } |
| 1441 | } else { |
| 1442 | /* add new diff node with all descendants */ |
Michal Vasko | 871a025 | 2020-11-11 18:35:24 +0100 | [diff] [blame] | 1443 | LY_CHECK_RET(lyd_dup_single(src_diff, (struct lyd_node_inner *)diff_parent, LYD_DUP_RECURSIVE | LYD_DUP_WITH_FLAGS, |
| 1444 | &diff_node)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1445 | |
| 1446 | /* insert node into diff if not already */ |
| 1447 | if (!diff_parent) { |
Michal Vasko | b104f11 | 2020-07-17 09:54:54 +0200 | [diff] [blame] | 1448 | lyd_insert_sibling(*diff, diff_node, diff); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1449 | } |
| 1450 | |
| 1451 | /* update operation */ |
| 1452 | LY_CHECK_RET(lyd_diff_change_op(diff_node, src_op)); |
| 1453 | |
| 1454 | if (diff_cb) { |
| 1455 | /* call callback */ |
Michal Vasko | bc5fba9 | 2020-08-07 12:14:39 +0200 | [diff] [blame] | 1456 | LY_CHECK_RET(diff_cb(src_diff, diff_node, cb_data)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1457 | } |
| 1458 | |
| 1459 | /* update diff parent */ |
| 1460 | diff_parent = diff_node; |
| 1461 | } |
| 1462 | |
| 1463 | /* remove any redundant nodes */ |
Michal Vasko | b98d708 | 2020-07-15 16:38:36 +0200 | [diff] [blame] | 1464 | if (lyd_diff_is_redundant(diff_parent)) { |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1465 | if (diff_parent == *diff) { |
| 1466 | *diff = (*diff)->next; |
| 1467 | } |
| 1468 | lyd_free_tree(diff_parent); |
| 1469 | } |
| 1470 | |
| 1471 | return LY_SUCCESS; |
| 1472 | } |
| 1473 | |
| 1474 | API LY_ERR |
Michal Vasko | fb737aa | 2020-08-06 13:53:53 +0200 | [diff] [blame] | 1475 | lyd_diff_merge_module(struct lyd_node **diff, const struct lyd_node *src_diff, const struct lys_module *mod, |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1476 | lyd_diff_cb diff_cb, void *cb_data, uint16_t options) |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1477 | { |
| 1478 | const struct lyd_node *src_root; |
| 1479 | |
| 1480 | LY_LIST_FOR(src_diff, src_root) { |
| 1481 | if (mod && (lyd_owner_module(src_root) != mod)) { |
| 1482 | /* skip data nodes from different modules */ |
| 1483 | continue; |
| 1484 | } |
| 1485 | |
| 1486 | /* apply relevant nodes from the diff datatree */ |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1487 | LY_CHECK_RET(lyd_diff_merge_r(src_root, NULL, diff_cb, cb_data, options, diff)); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1488 | } |
| 1489 | |
| 1490 | return LY_SUCCESS; |
| 1491 | } |
| 1492 | |
| 1493 | API LY_ERR |
Michal Vasko | 04f8591 | 2020-08-07 12:14:58 +0200 | [diff] [blame] | 1494 | lyd_diff_merge_tree(struct lyd_node **diff_first, struct lyd_node *diff_parent, const struct lyd_node *src_sibling, |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1495 | lyd_diff_cb diff_cb, void *cb_data, uint16_t options) |
Michal Vasko | 04f8591 | 2020-08-07 12:14:58 +0200 | [diff] [blame] | 1496 | { |
| 1497 | if (!src_sibling) { |
| 1498 | return LY_SUCCESS; |
| 1499 | } |
| 1500 | |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1501 | return lyd_diff_merge_r(src_sibling, diff_parent, diff_cb, cb_data, options, diff_first); |
Michal Vasko | 04f8591 | 2020-08-07 12:14:58 +0200 | [diff] [blame] | 1502 | } |
| 1503 | |
| 1504 | API LY_ERR |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1505 | lyd_diff_merge_all(struct lyd_node **diff, const struct lyd_node *src_diff, uint16_t options) |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1506 | { |
Michal Vasko | c0e58e8 | 2020-11-11 19:04:33 +0100 | [diff] [blame^] | 1507 | return lyd_diff_merge_module(diff, src_diff, NULL, NULL, NULL, options); |
Michal Vasko | e6323f6 | 2020-07-09 15:49:02 +0200 | [diff] [blame] | 1508 | } |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1509 | |
| 1510 | static LY_ERR |
| 1511 | lyd_diff_reverse_value(struct lyd_node *leaf, const struct lys_module *mod) |
| 1512 | { |
| 1513 | LY_ERR ret = LY_SUCCESS; |
| 1514 | struct lyd_meta *meta; |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1515 | const char *val1 = NULL; |
| 1516 | char *val2; |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 1517 | uint32_t flags; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1518 | |
| 1519 | meta = lyd_find_meta(leaf->meta, mod, "orig-value"); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1520 | LY_CHECK_ERR_RET(!meta, LOGINT(LYD_CTX(leaf)), LY_EINT); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1521 | |
| 1522 | /* orig-value */ |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1523 | val1 = meta->value.canonical; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1524 | |
| 1525 | /* current value */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1526 | val2 = strdup(LYD_CANON_VALUE(leaf)); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1527 | |
| 1528 | /* switch values, keep default flag */ |
| 1529 | flags = leaf->flags; |
| 1530 | LY_CHECK_GOTO(ret = lyd_change_term(leaf, val1), cleanup); |
| 1531 | leaf->flags = flags; |
| 1532 | LY_CHECK_GOTO(ret = lyd_change_meta(meta, val2), cleanup); |
| 1533 | |
| 1534 | cleanup: |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1535 | free(val2); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1536 | return ret; |
| 1537 | } |
| 1538 | |
| 1539 | static LY_ERR |
| 1540 | lyd_diff_reverse_default(struct lyd_node *node, const struct lys_module *mod) |
| 1541 | { |
| 1542 | struct lyd_meta *meta; |
Radek Krejci | 1deb5be | 2020-08-26 16:43:36 +0200 | [diff] [blame] | 1543 | uint32_t flag1, flag2; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1544 | |
| 1545 | meta = lyd_find_meta(node->meta, mod, "orig-default"); |
Michal Vasko | 610e93b | 2020-11-09 20:58:32 +0100 | [diff] [blame] | 1546 | LY_CHECK_ERR_RET(!meta, LOGINT(mod->ctx), LY_EINT); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1547 | |
| 1548 | /* orig-default */ |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1549 | if (meta->value.boolean) { |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1550 | flag1 = LYD_DEFAULT; |
| 1551 | } else { |
| 1552 | flag1 = 0; |
| 1553 | } |
| 1554 | |
| 1555 | /* current default */ |
| 1556 | flag2 = node->flags & LYD_DEFAULT; |
| 1557 | |
Michal Vasko | 610e93b | 2020-11-09 20:58:32 +0100 | [diff] [blame] | 1558 | if (flag1 == flag2) { |
| 1559 | /* no default state change so nothing to reverse */ |
| 1560 | return LY_SUCCESS; |
| 1561 | } |
| 1562 | |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1563 | /* switch defaults */ |
| 1564 | node->flags &= ~LYD_DEFAULT; |
| 1565 | node->flags |= flag1; |
| 1566 | LY_CHECK_RET(lyd_change_meta(meta, flag2 ? "true" : "false")); |
| 1567 | |
| 1568 | return LY_SUCCESS; |
| 1569 | } |
| 1570 | |
| 1571 | static LY_ERR |
| 1572 | lyd_diff_reverse_meta(struct lyd_node *node, const struct lys_module *mod, const char *name1, const char *name2) |
| 1573 | { |
| 1574 | LY_ERR ret = LY_SUCCESS; |
| 1575 | struct lyd_meta *meta1, *meta2; |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1576 | const char *val1 = NULL; |
| 1577 | char *val2 = NULL; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1578 | |
| 1579 | meta1 = lyd_find_meta(node->meta, mod, name1); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1580 | LY_CHECK_ERR_RET(!meta1, LOGINT(LYD_CTX(node)), LY_EINT); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1581 | |
| 1582 | meta2 = lyd_find_meta(node->meta, mod, name2); |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1583 | LY_CHECK_ERR_RET(!meta2, LOGINT(LYD_CTX(node)), LY_EINT); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1584 | |
| 1585 | /* value1 */ |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1586 | val1 = meta1->value.canonical; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1587 | |
| 1588 | /* value2 */ |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1589 | val2 = strdup(meta2->value.canonical); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1590 | |
| 1591 | /* switch values */ |
| 1592 | LY_CHECK_GOTO(ret = lyd_change_meta(meta1, val2), cleanup); |
| 1593 | LY_CHECK_GOTO(ret = lyd_change_meta(meta2, val1), cleanup); |
| 1594 | |
| 1595 | cleanup: |
Michal Vasko | ba99a3e | 2020-08-18 15:50:05 +0200 | [diff] [blame] | 1596 | free(val2); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1597 | return ret; |
| 1598 | } |
| 1599 | |
| 1600 | API LY_ERR |
Michal Vasko | 6653581 | 2020-08-11 08:44:22 +0200 | [diff] [blame] | 1601 | lyd_diff_reverse_all(const struct lyd_node *src_diff, struct lyd_node **diff) |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1602 | { |
| 1603 | LY_ERR ret = LY_SUCCESS; |
| 1604 | const struct lys_module *mod; |
Michal Vasko | 56daf73 | 2020-08-10 10:57:18 +0200 | [diff] [blame] | 1605 | struct lyd_node *root, *elem; |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1606 | enum lyd_diff_op op; |
| 1607 | |
| 1608 | LY_CHECK_ARG_RET(NULL, diff, LY_EINVAL); |
| 1609 | |
| 1610 | if (!src_diff) { |
| 1611 | *diff = NULL; |
| 1612 | return LY_SUCCESS; |
| 1613 | } |
| 1614 | |
| 1615 | /* duplicate diff */ |
Michal Vasko | 3a41dff | 2020-07-15 14:30:28 +0200 | [diff] [blame] | 1616 | LY_CHECK_RET(lyd_dup_siblings(src_diff, NULL, LYD_DUP_RECURSIVE, diff)); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1617 | |
| 1618 | /* find module with metadata needed for later */ |
Michal Vasko | b7be7a8 | 2020-08-20 09:09:04 +0200 | [diff] [blame] | 1619 | mod = ly_ctx_get_module_latest(LYD_CTX(src_diff), "yang"); |
| 1620 | LY_CHECK_ERR_GOTO(!mod, LOGINT(LYD_CTX(src_diff)); ret = LY_EINT, cleanup); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1621 | |
| 1622 | LY_LIST_FOR(*diff, root) { |
Michal Vasko | 56daf73 | 2020-08-10 10:57:18 +0200 | [diff] [blame] | 1623 | LYD_TREE_DFS_BEGIN(root, elem) { |
Michal Vasko | 0f5c6a5 | 2020-11-06 17:18:03 +0100 | [diff] [blame] | 1624 | /* skip all keys */ |
| 1625 | if (!lysc_is_key(elem->schema)) { |
| 1626 | /* find operation attribute, if any */ |
| 1627 | LY_CHECK_GOTO(ret = lyd_diff_get_op(elem, &op), cleanup); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1628 | |
Michal Vasko | 0f5c6a5 | 2020-11-06 17:18:03 +0100 | [diff] [blame] | 1629 | switch (op) { |
| 1630 | case LYD_DIFF_OP_CREATE: |
| 1631 | /* reverse create to delete */ |
| 1632 | LY_CHECK_GOTO(ret = lyd_diff_change_op(elem, LYD_DIFF_OP_DELETE), cleanup); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1633 | break; |
Michal Vasko | 0f5c6a5 | 2020-11-06 17:18:03 +0100 | [diff] [blame] | 1634 | case LYD_DIFF_OP_DELETE: |
| 1635 | /* reverse delete to create */ |
| 1636 | LY_CHECK_GOTO(ret = lyd_diff_change_op(elem, LYD_DIFF_OP_CREATE), cleanup); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1637 | break; |
Michal Vasko | 0f5c6a5 | 2020-11-06 17:18:03 +0100 | [diff] [blame] | 1638 | case LYD_DIFF_OP_REPLACE: |
| 1639 | switch (elem->schema->nodetype) { |
| 1640 | case LYS_LEAF: |
| 1641 | /* leaf value change */ |
| 1642 | LY_CHECK_GOTO(ret = lyd_diff_reverse_value(elem, mod), cleanup); |
| 1643 | LY_CHECK_GOTO(ret = lyd_diff_reverse_default(elem, mod), cleanup); |
| 1644 | break; |
| 1645 | case LYS_LEAFLIST: |
| 1646 | /* leaf-list move */ |
| 1647 | LY_CHECK_GOTO(ret = lyd_diff_reverse_default(elem, mod), cleanup); |
| 1648 | LY_CHECK_GOTO(ret = lyd_diff_reverse_meta(elem, mod, "orig-value", "value"), cleanup); |
| 1649 | break; |
| 1650 | case LYS_LIST: |
| 1651 | /* list move */ |
| 1652 | LY_CHECK_GOTO(ret = lyd_diff_reverse_meta(elem, mod, "orig-key", "key"), cleanup); |
| 1653 | break; |
| 1654 | default: |
| 1655 | LOGINT(LYD_CTX(src_diff)); |
| 1656 | ret = LY_EINT; |
| 1657 | goto cleanup; |
| 1658 | } |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1659 | break; |
Michal Vasko | 0f5c6a5 | 2020-11-06 17:18:03 +0100 | [diff] [blame] | 1660 | case LYD_DIFF_OP_NONE: |
| 1661 | switch (elem->schema->nodetype) { |
| 1662 | case LYS_LEAF: |
| 1663 | case LYS_LEAFLIST: |
| 1664 | /* default flag change */ |
| 1665 | LY_CHECK_GOTO(ret = lyd_diff_reverse_default(elem, mod), cleanup); |
| 1666 | break; |
| 1667 | default: |
| 1668 | /* nothing to do */ |
| 1669 | break; |
| 1670 | } |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1671 | break; |
| 1672 | } |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1673 | } |
| 1674 | |
Michal Vasko | 56daf73 | 2020-08-10 10:57:18 +0200 | [diff] [blame] | 1675 | LYD_TREE_DFS_END(root, elem); |
Michal Vasko | 4231fb6 | 2020-07-13 13:54:47 +0200 | [diff] [blame] | 1676 | } |
| 1677 | } |
| 1678 | |
| 1679 | cleanup: |
| 1680 | if (ret) { |
| 1681 | lyd_free_siblings(*diff); |
| 1682 | *diff = NULL; |
| 1683 | } |
| 1684 | return ret; |
| 1685 | } |