Adding upstream version 2.1.30.upstream/2.1.30

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1277 insertions, 0 deletions

diff --git a/src/context.c b/src/context.c
new file mode 100644
index 0000000..47e63d4
--- /dev/null
+++ b/src/context.c
@@ -0,0 +1,1277 @@
+/**
+ * @file context.c
+ * @author Radek Krejci <rkrejci@cesnet.cz>
+ * @author Michal Vasko <mvasko@cesnet.cz>
+ * @brief Context implementations
+ *
+ * Copyright (c) 2015 - 2021 CESNET, z.s.p.o.
+ *
+ * This source code is licensed under BSD 3-Clause License (the "License").
+ * You may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://opensource.org/licenses/BSD-3-Clause
+ */
+#define _GNU_SOURCE /* asprintf, strdup */
+#if defined (__NetBSD__) || defined (__OpenBSD__)
+/* realpath */
+#define _XOPEN_SOURCE 1
+#define _XOPEN_SOURCE_EXTENDED 1
+#endif
+
+#include "context.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "compat.h"
+#include "hash_table.h"
+#include "in.h"
+#include "parser_data.h"
+#include "plugins_internal.h"
+#include "plugins_types.h"
+#include "schema_compile.h"
+#include "set.h"
+#include "tree.h"
+#include "tree_data.h"
+#include "tree_data_internal.h"
+#include "tree_schema.h"
+#include "tree_schema_free.h"
+#include "tree_schema_internal.h"
+
+#include "../models/ietf-datastores@2018-02-14.h"
+#include "../models/ietf-inet-types@2013-07-15.h"
+#include "../models/ietf-yang-library@2019-01-04.h"
+#include "../models/ietf-yang-metadata@2016-08-05.h"
+#include "../models/ietf-yang-schema-mount@2019-01-14.h"
+#include "../models/ietf-yang-structure-ext@2020-06-17.h"
+#include "../models/ietf-yang-types@2013-07-15.h"
+#include "../models/yang@2022-06-16.h"
+#define IETF_YANG_LIB_REV "2019-01-04"
+
+static struct internal_modules_s {
+    const char *name;
+    const char *revision;
+    const char *data;
+    ly_bool implemented;
+    LYS_INFORMAT format;
+} internal_modules[] = {
+    {"ietf-yang-metadata", "2016-08-05", (const char *)ietf_yang_metadata_2016_08_05_yang, 0, LYS_IN_YANG},
+    {"yang", "2022-06-16", (const char *)yang_2022_06_16_yang, 1, LYS_IN_YANG},
+    {"ietf-inet-types", "2013-07-15", (const char *)ietf_inet_types_2013_07_15_yang, 0, LYS_IN_YANG},
+    {"ietf-yang-types", "2013-07-15", (const char *)ietf_yang_types_2013_07_15_yang, 0, LYS_IN_YANG},
+    {"ietf-yang-schema-mount", "2019-01-14", (const char *)ietf_yang_schema_mount_2019_01_14_yang, 1, LYS_IN_YANG},
+    {"ietf-yang-structure-ext", "2020-06-17", (const char *)ietf_yang_structure_ext_2020_06_17_yang, 0, LYS_IN_YANG},
+    /* ietf-datastores and ietf-yang-library must be right here at the end of the list! */
+    {"ietf-datastores", "2018-02-14", (const char *)ietf_datastores_2018_02_14_yang, 1, LYS_IN_YANG},
+    {"ietf-yang-library", IETF_YANG_LIB_REV, (const char *)ietf_yang_library_2019_01_04_yang, 1, LYS_IN_YANG}
+};
+
+#define LY_INTERNAL_MODS_COUNT sizeof(internal_modules) / sizeof(struct internal_modules_s)
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_set_searchdir(struct ly_ctx *ctx, const char *search_dir)
+{
+    struct stat st;
+    char *new_dir = NULL;
+
+    LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
+
+    if (search_dir) {
+        new_dir = realpath(search_dir, NULL);
+        LY_CHECK_ERR_RET(!new_dir,
+                LOGERR(ctx, LY_ESYS, "Unable to use search directory \"%s\" (%s).", search_dir, strerror(errno)),
+                LY_EINVAL);
+        if (strcmp(search_dir, new_dir)) {
+            LOGVRB("Search directory string \"%s\" canonized to \"%s\".", search_dir, new_dir);
+        }
+        LY_CHECK_ERR_RET(access(new_dir, R_OK | X_OK),
+                LOGERR(ctx, LY_ESYS, "Unable to fully access search directory \"%s\" (%s).", new_dir, strerror(errno)); free(new_dir),
+                LY_EINVAL);
+        LY_CHECK_ERR_RET(stat(new_dir, &st),
+                LOGERR(ctx, LY_ESYS, "stat() failed for \"%s\" (%s).", new_dir, strerror(errno)); free(new_dir),
+                LY_ESYS);
+        LY_CHECK_ERR_RET(!S_ISDIR(st.st_mode),
+                LOGERR(ctx, LY_ESYS, "Given search directory \"%s\" is not a directory.", new_dir); free(new_dir),
+                LY_EINVAL);
+        /* avoid path duplication */
+        for (uint32_t u = 0; u < ctx->search_paths.count; ++u) {
+            if (!strcmp(new_dir, ctx->search_paths.objs[u])) {
+                free(new_dir);
+                return LY_EEXIST;
+            }
+        }
+        if (ly_set_add(&ctx->search_paths, new_dir, 1, NULL)) {
+            free(new_dir);
+            return LY_EMEM;
+        }
+
+        /* new searchdir - possibly more latest revision available */
+        ly_ctx_reset_latests(ctx);
+
+        return LY_SUCCESS;
+    } else {
+        /* consider that no change is not actually an error */
+        return LY_SUCCESS;
+    }
+}
+
+LIBYANG_API_DEF const char * const *
+ly_ctx_get_searchdirs(const struct ly_ctx *ctx)
+{
+#define LY_CTX_SEARCHDIRS_SIZE_STEP 8
+    void **new;
+
+    LY_CHECK_ARG_RET(ctx, ctx, NULL);
+
+    if (ctx->search_paths.count == ctx->search_paths.size) {
+        /* not enough space for terminating NULL byte */
+        new = realloc(((struct ly_ctx *)ctx)->search_paths.objs,
+                (ctx->search_paths.size + LY_CTX_SEARCHDIRS_SIZE_STEP) * sizeof *ctx->search_paths.objs);
+        LY_CHECK_ERR_RET(!new, LOGMEM(NULL), NULL);
+        ((struct ly_ctx *)ctx)->search_paths.size += LY_CTX_SEARCHDIRS_SIZE_STEP;
+        ((struct ly_ctx *)ctx)->search_paths.objs = new;
+    }
+    /* set terminating NULL byte to the strings list */
+    ctx->search_paths.objs[ctx->search_paths.count] = NULL;
+
+    return (const char * const *)ctx->search_paths.objs;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_unset_searchdir(struct ly_ctx *ctx, const char *value)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
+
+    if (!ctx->search_paths.count) {
+        return LY_SUCCESS;
+    }
+
+    if (value) {
+        /* remove specific search directory */
+        uint32_t index;
+
+        for (index = 0; index < ctx->search_paths.count; ++index) {
+            if (!strcmp(value, ctx->search_paths.objs[index])) {
+                break;
+            }
+        }
+        if (index == ctx->search_paths.count) {
+            LOGARG(ctx, value);
+            return LY_EINVAL;
+        } else {
+            return ly_set_rm_index(&ctx->search_paths, index, free);
+        }
+    } else {
+        /* remove them all */
+        ly_set_erase(&ctx->search_paths, free);
+        memset(&ctx->search_paths, 0, sizeof ctx->search_paths);
+    }
+
+    return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_unset_searchdir_last(struct ly_ctx *ctx, uint32_t count)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
+
+    for ( ; count > 0 && ctx->search_paths.count; --count) {
+        LY_CHECK_RET(ly_set_rm_index(&ctx->search_paths, ctx->search_paths.count - 1, free))
+    }
+
+    return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_load_module(struct ly_ctx *ctx, const char *name, const char *revision, const char **features)
+{
+    struct lys_module *mod = NULL;
+    LY_ERR ret = LY_SUCCESS;
+
+    LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
+
+    /* load and parse */
+    ret = lys_parse_load(ctx, name, revision, &ctx->unres.creating, &mod);
+    LY_CHECK_GOTO(ret, cleanup);
+
+    /* implement */
+    ret = _lys_set_implemented(mod, features, &ctx->unres);
+    LY_CHECK_GOTO(ret, cleanup);
+
+    if (!(ctx->flags & LY_CTX_EXPLICIT_COMPILE)) {
+        /* create dep set for the module and mark all the modules that will be (re)compiled */
+        LY_CHECK_GOTO(ret = lys_unres_dep_sets_create(ctx, &ctx->unres.dep_sets, mod), cleanup);
+
+        /* (re)compile the whole dep set (other dep sets will have no modules marked for compilation) */
+        LY_CHECK_GOTO(ret = lys_compile_depset_all(ctx, &ctx->unres), cleanup);
+
+        /* unres resolved */
+        lys_unres_glob_erase(&ctx->unres);
+    }
+
+cleanup:
+    if (ret) {
+        lys_unres_glob_revert(ctx, &ctx->unres);
+        lys_unres_glob_erase(&ctx->unres);
+        mod = NULL;
+    }
+    return mod;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_new(const char *search_dir, uint16_t options, struct ly_ctx **new_ctx)
+{
+    struct ly_ctx *ctx = NULL;
+    struct lys_module *module;
+    char *search_dir_list, *sep, *dir;
+    const char **imp_f, *all_f[] = {"*", NULL};
+    uint32_t i;
+    struct ly_in *in = NULL;
+    LY_ERR rc = LY_SUCCESS;
+    struct lys_glob_unres unres = {0};
+
+    LY_CHECK_ARG_RET(NULL, new_ctx, LY_EINVAL);
+
+    ctx = calloc(1, sizeof *ctx);
+    LY_CHECK_ERR_GOTO(!ctx, LOGMEM(NULL); rc = LY_EMEM, cleanup);
+
+    /* dictionary */
+    lydict_init(&ctx->dict);
+
+    /* plugins */
+    LY_CHECK_ERR_GOTO(lyplg_init(), LOGINT(NULL); rc = LY_EINT, cleanup);
+
+    /* initialize thread-specific keys */
+    while ((pthread_key_create(&ctx->errlist_key, ly_err_free)) == EAGAIN) {}
+
+    /* init LYB hash lock */
+    pthread_mutex_init(&ctx->lyb_hash_lock, NULL);
+
+    /* models list */
+    ctx->flags = options;
+    if (search_dir) {
+        search_dir_list = strdup(search_dir);
+        LY_CHECK_ERR_GOTO(!search_dir_list, LOGMEM(NULL); rc = LY_EMEM, cleanup);
+
+        for (dir = search_dir_list; (sep = strchr(dir, PATH_SEPARATOR[0])) != NULL && rc == LY_SUCCESS; dir = sep + 1) {
+            *sep = 0;
+            rc = ly_ctx_set_searchdir(ctx, dir);
+            if (rc == LY_EEXIST) {
+                /* ignore duplication */
+                rc = LY_SUCCESS;
+            }
+        }
+        if (*dir && (rc == LY_SUCCESS)) {
+            rc = ly_ctx_set_searchdir(ctx, dir);
+            if (rc == LY_EEXIST) {
+                /* ignore duplication */
+                rc = LY_SUCCESS;
+            }
+        }
+        free(search_dir_list);
+
+        /* If ly_ctx_set_searchdir() failed, the error is already logged. Just exit */
+        LY_CHECK_GOTO(rc, cleanup);
+    }
+    ctx->change_count = 1;
+
+    if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
+        /* use it for creating the initial context */
+        ctx->flags |= LY_CTX_EXPLICIT_COMPILE;
+    }
+
+    /* create dummy in */
+    rc = ly_in_new_memory(internal_modules[0].data, &in);
+    LY_CHECK_GOTO(rc, cleanup);
+
+    /* load internal modules */
+    for (i = 0; i < ((options & LY_CTX_NO_YANGLIBRARY) ? (LY_INTERNAL_MODS_COUNT - 2) : LY_INTERNAL_MODS_COUNT); i++) {
+        ly_in_memory(in, internal_modules[i].data);
+        LY_CHECK_GOTO(rc = lys_parse_in(ctx, in, internal_modules[i].format, NULL, NULL, &unres.creating, &module), cleanup);
+        if (internal_modules[i].implemented || (ctx->flags & LY_CTX_ALL_IMPLEMENTED)) {
+            imp_f = (ctx->flags & LY_CTX_ENABLE_IMP_FEATURES) ? all_f : NULL;
+            LY_CHECK_GOTO(rc = lys_implement(module, imp_f, &unres), cleanup);
+        }
+    }
+
+    if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
+        /* compile now */
+        LY_CHECK_GOTO(rc = ly_ctx_compile(ctx), cleanup);
+        ctx->flags &= ~LY_CTX_EXPLICIT_COMPILE;
+    }
+
+cleanup:
+    ly_in_free(in, 0);
+    lys_unres_glob_erase(&unres);
+    if (rc) {
+        ly_ctx_destroy(ctx);
+    } else {
+        *new_ctx = ctx;
+    }
+    return rc;
+}
+
+static LY_ERR
+ly_ctx_new_yl_legacy(struct ly_ctx *ctx, const struct lyd_node *yltree)
+{
+    struct lyd_node *module, *node;
+    struct ly_set *set;
+    const char **feature_arr = NULL;
+    const char *name = NULL, *revision = NULL;
+    struct ly_set features = {0};
+    ly_bool imported = 0;
+    const struct lys_module *mod;
+    LY_ERR ret = LY_SUCCESS;
+    uint32_t i, j;
+
+    LY_CHECK_RET(ret = lyd_find_xpath(yltree, "/ietf-yang-library:yang-library/modules-state/module", &set));
+
+    /* process the data tree */
+    for (i = 0; i < set->count; ++i) {
+        module = set->dnodes[i];
+
+        /* initiate */
+        revision = NULL;
+        name = NULL;
+        imported = 0;
+
+        LY_LIST_FOR(lyd_child(module), node) {
+            if (!strcmp(node->schema->name, "name")) {
+                name = lyd_get_value(node);
+            } else if (!strcmp(node->schema->name, "revision")) {
+                revision = lyd_get_value(node);
+            } else if (!strcmp(node->schema->name, "feature")) {
+                LY_CHECK_GOTO(ret = ly_set_add(&features, node, 0, NULL), cleanup);
+            } else if (!strcmp(node->schema->name, "conformance-type") &&
+                    !strcmp(lyd_get_value(node), "import")) {
+                /* imported module - skip it, it will be loaded as a side effect
+                 * of loading another module */
+                imported = 1;
+                break;
+            }
+        }
+
+        if (imported) {
+            continue;
+        }
+
+        feature_arr = malloc((features.count + 1) * sizeof *feature_arr);
+        LY_CHECK_ERR_GOTO(!feature_arr, ret = LY_EMEM, cleanup);
+
+        /* Parse features into an array of strings */
+        for (j = 0; j < features.count; ++j) {
+            feature_arr[j] = lyd_get_value(features.dnodes[j]);
+        }
+        feature_arr[features.count] = NULL;
+        ly_set_clean(&features, free);
+
+        /* use the gathered data to load the module */
+        mod = ly_ctx_load_module(ctx, name, revision, feature_arr);
+        free(feature_arr);
+        if (!mod) {
+            LOGERR(ctx, LY_EINVAL, "Unable to load module specified by yang library data.");
+            ly_set_free(set, free);
+            return LY_EINVAL;
+        }
+    }
+
+cleanup:
+    ly_set_clean(&features, free);
+    ly_set_free(set, free);
+    return ret;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_new_ylpath(const char *search_dir, const char *path, LYD_FORMAT format, int options, struct ly_ctx **ctx)
+{
+    LY_ERR ret = LY_SUCCESS;
+    struct ly_ctx *ctx_yl = NULL;
+    struct lyd_node *data_yl = NULL;
+
+    LY_CHECK_ARG_RET(NULL, path, ctx, LY_EINVAL);
+
+    /* create a seperate context for the data */
+    LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, 0, &ctx_yl), cleanup);
+
+    /* parse yang library data tree */
+    LY_CHECK_GOTO(ret = lyd_parse_data_path(ctx_yl, path, format, 0, LYD_VALIDATE_PRESENT, &data_yl), cleanup);
+
+    /* create the new context */
+    ret = ly_ctx_new_yldata(search_dir, data_yl, options, ctx);
+
+cleanup:
+    lyd_free_all(data_yl);
+    ly_ctx_destroy(ctx_yl);
+    return ret;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_new_ylmem(const char *search_dir, const char *data, LYD_FORMAT format, int options, struct ly_ctx **ctx)
+{
+    LY_ERR ret = LY_SUCCESS;
+    struct ly_ctx *ctx_yl = NULL;
+    struct lyd_node *data_yl = NULL;
+
+    LY_CHECK_ARG_RET(NULL, data, ctx, LY_EINVAL);
+
+    /* create a seperate context for the data */
+    LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, 0, &ctx_yl), cleanup);
+
+    /* parse yang library data tree */
+    LY_CHECK_GOTO(ret = lyd_parse_data_mem(ctx_yl, data, format, 0, LYD_VALIDATE_PRESENT, &data_yl), cleanup);
+
+    /* create the new context */
+    ret = ly_ctx_new_yldata(search_dir, data_yl, options, ctx);
+
+cleanup:
+    lyd_free_all(data_yl);
+    ly_ctx_destroy(ctx_yl);
+    return ret;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_new_yldata(const char *search_dir, const struct lyd_node *tree, int options, struct ly_ctx **ctx)
+{
+    const char *name = NULL, *revision = NULL;
+    struct lyd_node *module, *node;
+    struct ly_set *set = NULL;
+    const char **feature_arr = NULL;
+    struct ly_set features = {0};
+    LY_ERR ret = LY_SUCCESS;
+    const struct lys_module *mod;
+    struct ly_ctx *ctx_new = NULL;
+    ly_bool no_expl_compile = 0;
+    uint32_t i, j;
+
+    LY_CHECK_ARG_RET(NULL, tree, ctx, LY_EINVAL);
+
+    /* create a new context */
+    if (*ctx == NULL) {
+        LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, options, &ctx_new), cleanup);
+    } else {
+        ctx_new = *ctx;
+    }
+
+    /* redundant to compile modules one-by-one */
+    if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
+        ctx_new->flags |= LY_CTX_EXPLICIT_COMPILE;
+        no_expl_compile = 1;
+    }
+
+    LY_CHECK_GOTO(ret = lyd_find_xpath(tree, "/ietf-yang-library:yang-library/module-set[1]/module", &set), cleanup);
+    if (set->count == 0) {
+        /* perhaps a legacy data tree? */
+        LY_CHECK_GOTO(ret = ly_ctx_new_yl_legacy(ctx_new, tree), cleanup);
+    } else {
+        /* process the data tree */
+        for (i = 0; i < set->count; ++i) {
+            module = set->dnodes[i];
+
+            /* initiate */
+            name = NULL;
+            revision = NULL;
+
+            /* iterate over data */
+            LY_LIST_FOR(lyd_child(module), node) {
+                if (!strcmp(node->schema->name, "name")) {
+                    name = lyd_get_value(node);
+                } else if (!strcmp(node->schema->name, "revision")) {
+                    revision = lyd_get_value(node);
+                } else if (!strcmp(node->schema->name, "feature")) {
+                    LY_CHECK_GOTO(ret = ly_set_add(&features, node, 0, NULL), cleanup);
+                }
+            }
+
+            feature_arr = malloc((features.count + 1) * sizeof *feature_arr);
+            LY_CHECK_ERR_GOTO(!feature_arr, ret = LY_EMEM, cleanup);
+
+            /* parse features into an array of strings */
+            for (j = 0; j < features.count; ++j) {
+                feature_arr[j] = lyd_get_value(features.dnodes[j]);
+            }
+            feature_arr[features.count] = NULL;
+            ly_set_clean(&features, NULL);
+
+            /* use the gathered data to load the module */
+            mod = ly_ctx_load_module(ctx_new, name, revision, feature_arr);
+            free(feature_arr);
+            if (!mod) {
+                LOGERR(*ctx ? *ctx : LYD_CTX(tree), LY_EINVAL, "Unable to load module %s@%s specified by yang library data.",
+                        name, revision ? revision : "<none>");
+                ret = LY_EINVAL;
+                goto cleanup;
+            }
+        }
+    }
+
+    /* compile */
+    LY_CHECK_GOTO(ret = ly_ctx_compile(ctx_new), cleanup);
+
+    if (no_expl_compile) {
+        /* unset flag */
+        ctx_new->flags &= ~LY_CTX_EXPLICIT_COMPILE;
+    }
+
+cleanup:
+    ly_set_free(set, NULL);
+    ly_set_erase(&features, NULL);
+    if (*ctx == NULL) {
+        *ctx = ctx_new;
+        if (ret) {
+            ly_ctx_destroy(*ctx);
+            *ctx = NULL;
+        }
+    }
+    return ret;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_compile(struct ly_ctx *ctx)
+{
+    LY_ERR ret = LY_SUCCESS;
+
+    LY_CHECK_ARG_RET(NULL, ctx, LY_EINVAL);
+
+    /* create dep sets and mark all the modules that will be (re)compiled */
+    LY_CHECK_GOTO(ret = lys_unres_dep_sets_create(ctx, &ctx->unres.dep_sets, NULL), cleanup);
+
+    /* (re)compile all the dep sets */
+    LY_CHECK_GOTO(ret = lys_compile_depset_all(ctx, &ctx->unres), cleanup);
+
+cleanup:
+    if (ret) {
+        /* revert changes of modules */
+        lys_unres_glob_revert(ctx, &ctx->unres);
+    }
+    lys_unres_glob_erase(&ctx->unres);
+    return ret;
+}
+
+LIBYANG_API_DEF uint16_t
+ly_ctx_get_options(const struct ly_ctx *ctx)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, 0);
+
+    return ctx->flags;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_set_options(struct ly_ctx *ctx, uint16_t option)
+{
+    LY_ERR lyrc = LY_SUCCESS;
+    struct lys_module *mod;
+    uint32_t i;
+
+    LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
+    LY_CHECK_ERR_RET((option & LY_CTX_NO_YANGLIBRARY) && !(ctx->flags & LY_CTX_NO_YANGLIBRARY),
+            LOGARG(ctx, option), LY_EINVAL);
+
+    if (!(ctx->flags & LY_CTX_SET_PRIV_PARSED) && (option & LY_CTX_SET_PRIV_PARSED)) {
+        ctx->flags |= LY_CTX_SET_PRIV_PARSED;
+        /* recompile the whole context to set the priv pointers */
+        for (i = 0; i < ctx->list.count; ++i) {
+            mod = ctx->list.objs[i];
+            if (mod->implemented) {
+                mod->to_compile = 1;
+            }
+        }
+        lyrc = ly_ctx_compile(ctx);
+        if (lyrc) {
+            ly_ctx_unset_options(ctx, LY_CTX_SET_PRIV_PARSED);
+        }
+    }
+
+    /* set the option(s) */
+    if (!lyrc) {
+        ctx->flags |= option;
+    }
+
+    return lyrc;
+}
+
+static LY_ERR
+lysc_node_clear_priv_dfs_cb(struct lysc_node *node, void *UNUSED(data), ly_bool *UNUSED(dfs_continue))
+{
+    node->priv = NULL;
+    return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_unset_options(struct ly_ctx *ctx, uint16_t option)
+{
+    LY_ARRAY_COUNT_TYPE u, v;
+    const struct lysc_ext_instance *ext;
+    struct lysc_node *root;
+
+    LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
+    LY_CHECK_ERR_RET(option & LY_CTX_NO_YANGLIBRARY, LOGARG(ctx, option), LY_EINVAL);
+
+    if ((ctx->flags & LY_CTX_SET_PRIV_PARSED) && (option & LY_CTX_SET_PRIV_PARSED)) {
+        struct lys_module *mod;
+        uint32_t index;
+
+        index = 0;
+        while ((mod = ly_ctx_get_module_iter(ctx, &index))) {
+            if (!mod->compiled) {
+                continue;
+            }
+
+            /* set NULL for all ::lysc_node.priv pointers in module */
+            lysc_module_dfs_full(mod, lysc_node_clear_priv_dfs_cb, NULL);
+
+            /* set NULL for all ::lysc_node.priv pointers in compiled extension instances */
+            LY_ARRAY_FOR(mod->compiled->exts, u) {
+                ext = &mod->compiled->exts[u];
+                LY_ARRAY_FOR(ext->substmts, v) {
+                    if (ext->substmts[v].stmt & LY_STMT_DATA_NODE_MASK) {
+                        LY_LIST_FOR(*(struct lysc_node **)ext->substmts[v].storage, root) {
+                            lysc_tree_dfs_full(root, lysc_node_clear_priv_dfs_cb, NULL);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /* unset the option(s) */
+    ctx->flags &= ~option;
+
+    return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF uint16_t
+ly_ctx_get_change_count(const struct ly_ctx *ctx)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, 0);
+
+    return ctx->change_count;
+}
+
+LIBYANG_API_DEF ly_module_imp_clb
+ly_ctx_get_module_imp_clb(const struct ly_ctx *ctx, void **user_data)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, NULL);
+
+    if (user_data) {
+        *user_data = ctx->imp_clb_data;
+    }
+    return ctx->imp_clb;
+}
+
+LIBYANG_API_DEF void
+ly_ctx_set_module_imp_clb(struct ly_ctx *ctx, ly_module_imp_clb clb, void *user_data)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, );
+
+    ctx->imp_clb = clb;
+    ctx->imp_clb_data = user_data;
+}
+
+LIBYANG_API_DEF ly_ext_data_clb
+ly_ctx_set_ext_data_clb(struct ly_ctx *ctx, ly_ext_data_clb clb, void *user_data)
+{
+    ly_ext_data_clb prev;
+
+    LY_CHECK_ARG_RET(ctx, ctx, NULL);
+
+    prev = ctx->ext_clb;
+    ctx->ext_clb = clb;
+    ctx->ext_clb_data = user_data;
+
+    return prev;
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_iter(const struct ly_ctx *ctx, uint32_t *index)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, index, NULL);
+
+    if (*index < ctx->list.count) {
+        return ctx->list.objs[(*index)++];
+    } else {
+        return NULL;
+    }
+}
+
+/**
+ * @brief Iterate over the modules in the given context. Returned modules must match the given key at the offset of
+ * lysp_module and lysc_module structures (they are supposed to be placed at the same offset in both structures).
+ *
+ * @param[in] ctx Context where to iterate.
+ * @param[in] key Key value to search for.
+ * @param[in] key_size Optional length of the @p key. If zero, NULL-terminated key is expected.
+ * @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
+ * @param[in,out] Iterator to pass between the function calls. On the first call, the variable is supposed to be
+ * initiated to 0. After each call returning a module, the value is greater by 1 than the index of the returned
+ * module in the context.
+ * @return Module matching the given key, NULL if no such module found.
+ */
+static struct lys_module *
+ly_ctx_get_module_by_iter(const struct ly_ctx *ctx, const char *key, size_t key_size, size_t key_offset, uint32_t *index)
+{
+    struct lys_module *mod;
+    const char *value;
+
+    for ( ; *index < ctx->list.count; ++(*index)) {
+        mod = ctx->list.objs[*index];
+        value = *(const char **)(((int8_t *)(mod)) + key_offset);
+        if ((!key_size && !strcmp(key, value)) || (key_size && !strncmp(key, value, key_size) && (value[key_size] == '\0'))) {
+            /* increment index for the next run */
+            ++(*index);
+            return mod;
+        }
+    }
+    /* done */
+    return NULL;
+}
+
+/**
+ * @brief Unifying function for ly_ctx_get_module() and ly_ctx_get_module_ns()
+ * @param[in] ctx Context where to search.
+ * @param[in] key Name or Namespace as a search key.
+ * @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
+ * @param[in] revision Revision date to match. If NULL, the matching module must have no revision. To search for the latest
+ * revision module, use ly_ctx_get_module_latest_by().
+ * @return Matching module if any.
+ */
+static struct lys_module *
+ly_ctx_get_module_by(const struct ly_ctx *ctx, const char *key, size_t key_offset, const char *revision)
+{
+    struct lys_module *mod;
+    uint32_t index = 0;
+
+    while ((mod = ly_ctx_get_module_by_iter(ctx, key, 0, key_offset, &index))) {
+        if (!revision) {
+            if (!mod->revision) {
+                /* found requested module without revision */
+                return mod;
+            }
+        } else {
+            if (mod->revision && !strcmp(mod->revision, revision)) {
+                /* found requested module of the specific revision */
+                return mod;
+            }
+        }
+    }
+
+    return NULL;
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_ns(const struct ly_ctx *ctx, const char *ns, const char *revision)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
+    return ly_ctx_get_module_by(ctx, ns, offsetof(struct lys_module, ns), revision);
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module(const struct ly_ctx *ctx, const char *name, const char *revision)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
+    return ly_ctx_get_module_by(ctx, name, offsetof(struct lys_module, name), revision);
+}
+
+/**
+ * @brief Unifying function for ly_ctx_get_module_latest() and ly_ctx_get_module_latest_ns()
+ * @param[in] ctx Context where to search.
+ * @param[in] key Name or Namespace as a search key.
+ * @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
+ * @return Matching module if any.
+ */
+static struct lys_module *
+ly_ctx_get_module_latest_by(const struct ly_ctx *ctx, const char *key, size_t key_offset)
+{
+    struct lys_module *mod;
+    uint32_t index = 0;
+
+    while ((mod = ly_ctx_get_module_by_iter(ctx, key, 0, key_offset, &index))) {
+        if (mod->latest_revision & LYS_MOD_LATEST_REV) {
+            return mod;
+        }
+    }
+
+    return NULL;
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_latest(const struct ly_ctx *ctx, const char *name)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
+    return ly_ctx_get_module_latest_by(ctx, name, offsetof(struct lys_module, name));
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_latest_ns(const struct ly_ctx *ctx, const char *ns)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
+    return ly_ctx_get_module_latest_by(ctx, ns, offsetof(struct lys_module, ns));
+}
+
+/**
+ * @brief Unifying function for ly_ctx_get_module_implemented() and ly_ctx_get_module_implemented_ns()
+ * @param[in] ctx Context where to search.
+ * @param[in] key Name or Namespace as a search key.
+ * @param[in] key_size Optional length of the @p key. If zero, NULL-terminated key is expected.
+ * @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
+ * @return Matching module if any.
+ */
+static struct lys_module *
+ly_ctx_get_module_implemented_by(const struct ly_ctx *ctx, const char *key, size_t key_size, size_t key_offset)
+{
+    struct lys_module *mod;
+    uint32_t index = 0;
+
+    while ((mod = ly_ctx_get_module_by_iter(ctx, key, key_size, key_offset, &index))) {
+        if (mod->implemented) {
+            return mod;
+        }
+    }
+
+    return NULL;
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_implemented(const struct ly_ctx *ctx, const char *name)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
+    return ly_ctx_get_module_implemented_by(ctx, name, 0, offsetof(struct lys_module, name));
+}
+
+struct lys_module *
+ly_ctx_get_module_implemented2(const struct ly_ctx *ctx, const char *name, size_t name_len)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
+    return ly_ctx_get_module_implemented_by(ctx, name, name_len, offsetof(struct lys_module, name));
+}
+
+LIBYANG_API_DEF struct lys_module *
+ly_ctx_get_module_implemented_ns(const struct ly_ctx *ctx, const char *ns)
+{
+    LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
+    return ly_ctx_get_module_implemented_by(ctx, ns, 0, offsetof(struct lys_module, ns));
+}
+
+/**
+ * @brief Try to find a submodule in a module.
+ *
+ * @param[in] module Module where to search in.
+ * @param[in] submodule Name of the submodule to find.
+ * @param[in] revision Revision of the submodule to find. NULL for submodule with no revision.
+ * @param[in] latest Ignore @p revision and look for the latest revision.
+ * @return Pointer to the specified submodule if it is present in the context.
+ */
+static const struct lysp_submodule *
+_ly_ctx_get_submodule2(const struct lys_module *module, const char *submodule, const char *revision, ly_bool latest)
+{
+    struct lysp_include *inc;
+    LY_ARRAY_COUNT_TYPE u;
+
+    LY_CHECK_ARG_RET(NULL, module, module->parsed, submodule, NULL);
+
+    LY_ARRAY_FOR(module->parsed->includes, u) {
+        if (module->parsed->includes[u].submodule && !strcmp(submodule, module->parsed->includes[u].submodule->name)) {
+            inc = &module->parsed->includes[u];
+
+            if (latest && inc->submodule->latest_revision) {
+                /* latest revision */
+                return inc->submodule;
+            } else if (!revision && !inc->submodule->revs) {
+                /* no revision */
+                return inc->submodule;
+            } else if (revision && inc->submodule->revs && !strcmp(revision, inc->submodule->revs[0].date)) {
+                /* specific revision */
+                return inc->submodule;
+            }
+        }
+    }
+
+    return NULL;
+}
+
+/**
+ * @brief Try to find a submodule in the context.
+ *
+ * @param[in] ctx Context where to search in.
+ * @param[in] submodule Name of the submodule to find.
+ * @param[in] revision Revision of the submodule to find. NULL for submodule with no revision.
+ * @param[in] latest Ignore @p revision and look for the latest revision.
+ * @return Pointer to the specified submodule if it is present in the context.
+ */
+static const struct lysp_submodule *
+_ly_ctx_get_submodule(const struct ly_ctx *ctx, const char *submodule, const char *revision, ly_bool latest)
+{
+    const struct lys_module *mod;
+    const struct lysp_submodule *submod = NULL;
+    uint32_t v;
+
+    LY_CHECK_ARG_RET(ctx, ctx, submodule, NULL);
+
+    for (v = 0; v < ctx->list.count; ++v) {
+        mod = ctx->list.objs[v];
+        if (!mod->parsed) {
+            continue;
+        }
+
+        submod = _ly_ctx_get_submodule2(mod, submodule, revision, latest);
+        if (submod) {
+            break;
+        }
+    }
+
+    return submod;
+}
+
+LIBYANG_API_DEF const struct lysp_submodule *
+ly_ctx_get_submodule(const struct ly_ctx *ctx, const char *submodule, const char *revision)
+{
+    return _ly_ctx_get_submodule(ctx, submodule, revision, 0);
+}
+
+LIBYANG_API_DEF const struct lysp_submodule *
+ly_ctx_get_submodule_latest(const struct ly_ctx *ctx, const char *submodule)
+{
+    return _ly_ctx_get_submodule(ctx, submodule, NULL, 1);
+}
+
+LIBYANG_API_DEF const struct lysp_submodule *
+ly_ctx_get_submodule2(const struct lys_module *module, const char *submodule, const char *revision)
+{
+    return _ly_ctx_get_submodule2(module, submodule, revision, 0);
+}
+
+LIBYANG_API_DEF const struct lysp_submodule *
+ly_ctx_get_submodule2_latest(const struct lys_module *module, const char *submodule)
+{
+    return _ly_ctx_get_submodule2(module, submodule, NULL, 1);
+}
+
+LIBYANG_API_DEF void
+ly_ctx_reset_latests(struct ly_ctx *ctx)
+{
+    struct lys_module *mod;
+
+    for (uint32_t v = 0; v < ctx->list.count; ++v) {
+        mod = ctx->list.objs[v];
+        mod->latest_revision &= ~(LYS_MOD_LATEST_SEARCHDIRS | LYS_MOD_LATEST_IMPCLB);
+        if (mod->parsed && mod->parsed->includes) {
+            for (LY_ARRAY_COUNT_TYPE u = 0; u < LY_ARRAY_COUNT(mod->parsed->includes); ++u) {
+                mod->parsed->includes[u].submodule->latest_revision &= ~(LYS_MOD_LATEST_SEARCHDIRS | LYS_MOD_LATEST_IMPCLB);
+            }
+        }
+    }
+}
+
+LIBYANG_API_DEF uint32_t
+ly_ctx_internal_modules_count(const struct ly_ctx *ctx)
+{
+    if (!ctx) {
+        return 0;
+    }
+
+    if (ctx->flags & LY_CTX_NO_YANGLIBRARY) {
+        return LY_INTERNAL_MODS_COUNT - 2;
+    } else {
+        return LY_INTERNAL_MODS_COUNT;
+    }
+}
+
+static LY_ERR
+ylib_feature(struct lyd_node *parent, const struct lysp_module *pmod)
+{
+    LY_ARRAY_COUNT_TYPE u;
+    struct lysp_feature *f;
+
+    if (!pmod->mod->implemented) {
+        /* no features can be enabled */
+        return LY_SUCCESS;
+    }
+
+    LY_ARRAY_FOR(pmod->features, struct lysp_feature, f) {
+        if (!(f->flags & LYS_FENABLED)) {
+            continue;
+        }
+
+        LY_CHECK_RET(lyd_new_term(parent, NULL, "feature", f->name, 0, NULL));
+    }
+
+    LY_ARRAY_FOR(pmod->includes, u) {
+        LY_ARRAY_FOR(pmod->includes[u].submodule->features, struct lysp_feature, f) {
+            if (!(f->flags & LYS_FENABLED)) {
+                continue;
+            }
+
+            LY_CHECK_RET(lyd_new_term(parent, NULL, "feature", f->name, 0, NULL));
+        }
+    }
+
+    return LY_SUCCESS;
+}
+
+static LY_ERR
+ylib_deviation(struct lyd_node *parent, const struct lys_module *cur_mod, ly_bool bis)
+{
+    LY_ARRAY_COUNT_TYPE i;
+    struct lys_module *mod;
+
+    if (!cur_mod->implemented) {
+        /* no deviations of the module for certain */
+        return LY_SUCCESS;
+    }
+
+    LY_ARRAY_FOR(cur_mod->deviated_by, i) {
+        mod = cur_mod->deviated_by[i];
+
+        if (bis) {
+            LY_CHECK_RET(lyd_new_term(parent, NULL, "deviation", mod->name, 0, NULL));
+        } else {
+            LY_CHECK_RET(lyd_new_list(parent, NULL, "deviation", 0, NULL, mod->name,
+                    (mod->parsed->revs ? mod->parsed->revs[0].date : "")));
+        }
+    }
+
+    return LY_SUCCESS;
+}
+
+static LY_ERR
+ylib_submodules(struct lyd_node *parent, const struct lysp_module *pmod, ly_bool bis)
+{
+    LY_ERR ret;
+    LY_ARRAY_COUNT_TYPE i;
+    struct lyd_node *cont;
+    struct lysp_submodule *submod;
+    int r;
+    char *str;
+
+    LY_ARRAY_FOR(pmod->includes, i) {
+        submod = pmod->includes[i].submodule;
+
+        if (bis) {
+            LY_CHECK_RET(lyd_new_list(parent, NULL, "submodule", 0, &cont, submod->name));
+
+            if (submod->revs) {
+                LY_CHECK_RET(lyd_new_term(cont, NULL, "revision", submod->revs[0].date, 0, NULL));
+            }
+        } else {
+            LY_CHECK_RET(lyd_new_list(parent, NULL, "submodule", 0, &cont, submod->name,
+                    (submod->revs ? submod->revs[0].date : "")));
+        }
+
+        if (submod->filepath) {
+            r = asprintf(&str, "file://%s", submod->filepath);
+            LY_CHECK_ERR_RET(r == -1, LOGMEM(pmod->mod->ctx), LY_EMEM);
+
+            ret = lyd_new_term(cont, NULL, bis ? "location" : "schema", str, 0, NULL);
+            free(str);
+            LY_CHECK_RET(ret);
+        }
+    }
+
+    return LY_SUCCESS;
+}
+
+LIBYANG_API_DEF LY_ERR
+ly_ctx_get_yanglib_data(const struct ly_ctx *ctx, struct lyd_node **root_p, const char *content_id_format, ...)
+{
+    LY_ERR ret;
+    uint32_t i;
+    ly_bool bis = 0;
+    int r;
+    char *str;
+    const struct lys_module *mod;
+    struct lyd_node *root = NULL, *root_bis = NULL, *cont, *set_bis = NULL;
+    va_list ap;
+
+    LY_CHECK_ARG_RET(ctx, ctx, root_p, LY_EINVAL);
+
+    mod = ly_ctx_get_module_implemented(ctx, "ietf-yang-library");
+    LY_CHECK_ERR_RET(!mod, LOGERR(ctx, LY_EINVAL, "Module \"ietf-yang-library\" is not implemented."), LY_EINVAL);
+
+    if (mod->parsed->revs && !strcmp(mod->parsed->revs[0].date, "2016-06-21")) {
+        bis = 0;
+    } else if (mod->parsed->revs && !strcmp(mod->parsed->revs[0].date, IETF_YANG_LIB_REV)) {
+        bis = 1;
+    } else {
+        LOGERR(ctx, LY_EINVAL, "Incompatible ietf-yang-library version in context.");
+        return LY_EINVAL;
+    }
+
+    LY_CHECK_GOTO(ret = lyd_new_inner(NULL, mod, "modules-state", 0, &root), error);
+
+    if (bis) {
+        LY_CHECK_GOTO(ret = lyd_new_inner(NULL, mod, "yang-library", 0, &root_bis), error);
+        LY_CHECK_GOTO(ret = lyd_new_list(root_bis, NULL, "module-set", 0, &set_bis, "complete"), error);
+    }
+
+    for (i = 0; i < ctx->list.count; ++i) {
+        mod = ctx->list.objs[i];
+        if (!mod->parsed) {
+            LOGERR(ctx, LY_ENOTFOUND, "Parsed module \"%s\" missing in the context.", mod->name);
+            goto error;
+        }
+
+        /*
+         * deprecated legacy
+         */
+        LY_CHECK_GOTO(ret = lyd_new_list(root, NULL, "module", 0, &cont, mod->name,
+                (mod->parsed->revs ? mod->parsed->revs[0].date : "")), error);
+
+        /* schema */
+        if (mod->filepath) {
+            r = asprintf(&str, "file://%s", mod->filepath);
+            LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
+
+            ret = lyd_new_term(cont, NULL, "schema", str, 0, NULL);
+            free(str);
+            LY_CHECK_GOTO(ret, error);
+        }
+
+        /* namespace */
+        LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "namespace", mod->ns, 0, NULL), error);
+
+        /* feature leaf-list */
+        LY_CHECK_GOTO(ret = ylib_feature(cont, mod->parsed), error);
+
+        /* deviation list */
+        LY_CHECK_GOTO(ret = ylib_deviation(cont, mod, 0), error);
+
+        /* conformance-type */
+        LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "conformance-type", mod->implemented ? "implement" : "import", 0,
+                NULL), error);
+
+        /* submodule list */
+        LY_CHECK_GOTO(ret = ylib_submodules(cont, mod->parsed, 0), error);
+
+        /*
+         * current revision
+         */
+        if (bis) {
+            /* name and revision */
+            if (mod->implemented) {
+                LY_CHECK_GOTO(ret = lyd_new_list(set_bis, NULL, "module", 0, &cont, mod->name), error);
+
+                if (mod->parsed->revs) {
+                    LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "revision", mod->parsed->revs[0].date, 0, NULL), error);
+                }
+            } else {
+                LY_CHECK_GOTO(ret = lyd_new_list(set_bis, NULL, "import-only-module", 0, &cont, mod->name,
+                        (mod->parsed->revs ? mod->parsed->revs[0].date : "")), error);
+            }
+
+            /* namespace */
+            LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "namespace", mod->ns, 0, NULL), error);
+
+            /* location */
+            if (mod->filepath) {
+                r = asprintf(&str, "file://%s", mod->filepath);
+                LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
+
+                ret = lyd_new_term(cont, NULL, "location", str, 0, NULL);
+                free(str);
+                LY_CHECK_GOTO(ret, error);
+            }
+
+            /* submodule list */
+            LY_CHECK_GOTO(ret = ylib_submodules(cont, mod->parsed, 1), error);
+
+            /* feature list */
+            LY_CHECK_GOTO(ret = ylib_feature(cont, mod->parsed), error);
+
+            /* deviation */
+            LY_CHECK_GOTO(ret = ylib_deviation(cont, mod, 1), error);
+        }
+    }
+
+    /* IDs */
+    va_start(ap, content_id_format);
+    r = vasprintf(&str, content_id_format, ap);
+    va_end(ap);
+    LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
+    ret = lyd_new_term(root, NULL, "module-set-id", str, 0, NULL);
+    LY_CHECK_ERR_GOTO(ret, free(str), error);
+
+    if (bis) {
+        /* create one complete schema */
+        LY_CHECK_ERR_GOTO(ret = lyd_new_list(root_bis, NULL, "schema", 0, &cont, "complete"), free(str), error);
+
+        LY_CHECK_ERR_GOTO(ret = lyd_new_term(cont, NULL, "module-set", "complete", 0, NULL), free(str), error);
+
+        /* content-id */
+        LY_CHECK_ERR_GOTO(ret = lyd_new_term(root_bis, NULL, "content-id", str, 0, NULL), free(str), error);
+    }
+    free(str);
+
+    if (root_bis) {
+        if (lyd_insert_sibling(root, root_bis, &root)) {
+            goto error;
+        }
+        root_bis = NULL;
+    }
+
+    LY_CHECK_GOTO(ret = lyd_validate_all(&root, NULL, LYD_VALIDATE_PRESENT, NULL), error);
+
+    *root_p = root;
+    return LY_SUCCESS;
+
+error:
+    lyd_free_all(root);
+    lyd_free_all(root_bis);
+    return ret;
+}
+
+LIBYANG_API_DEF void
+ly_ctx_destroy(struct ly_ctx *ctx)
+{
+    struct lysf_ctx fctx = {.ctx = ctx};
+
+    if (!ctx) {
+        return;
+    }
+
+    /* models list */
+    for ( ; ctx->list.count; ctx->list.count--) {
+        fctx.mod = ctx->list.objs[ctx->list.count - 1];
+
+        /* remove the module */
+        if (fctx.mod->implemented) {
+            fctx.mod->implemented = 0;
+            lysc_module_free(&fctx, fctx.mod->compiled);
+            fctx.mod->compiled = NULL;
+        }
+        lys_module_free(&fctx, fctx.mod, 0);
+    }
+    free(ctx->list.objs);
+
+    /* free extensions */
+    lysf_ctx_erase(&fctx);
+
+    /* search paths list */
+    ly_set_erase(&ctx->search_paths, free);
+
+    /* leftover unres */
+    lys_unres_glob_erase(&ctx->unres);
+
+    /* clean the error list */
+    ly_err_clean(ctx, 0);
+    pthread_key_delete(ctx->errlist_key);
+
+    /* dictionary */
+    lydict_clean(&ctx->dict);
+
+    /* LYB hash lock */
+    pthread_mutex_destroy(&ctx->lyb_hash_lock);
+
+    /* plugins - will be removed only if this is the last context */
+    lyplg_clean();
+
+    free(ctx);
+}