diff options
Diffstat (limited to 'ldb/ldb_tdb')
| -rw-r--r-- | ldb/ldb_tdb/ldb_cache.c | 458 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_index.c | 1273 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_pack.c | 289 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_search.c | 616 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_tdb.c | 1140 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_tdb.h | 130 | ||||
| -rw-r--r-- | ldb/ldb_tdb/ldb_tdb_wrap.c | 153 |
7 files changed, 4059 insertions, 0 deletions
diff --git a/ldb/ldb_tdb/ldb_cache.c b/ldb/ldb_tdb/ldb_cache.c new file mode 100644 index 00000000..2576e2c7 --- /dev/null +++ b/ldb/ldb_tdb/ldb_cache.c @@ -0,0 +1,458 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2004 + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Name: ldb + * + * Component: ldb tdb cache functions + * + * Description: cache special records in a ldb/tdb + * + * Author: Andrew Tridgell + */ + +#include "ldb_includes.h" + +#include "ldb_tdb.h" + +#define LTDB_FLAG_CASE_INSENSITIVE (1<<0) +#define LTDB_FLAG_INTEGER (1<<1) +#define LTDB_FLAG_HIDDEN (1<<2) + +/* valid attribute flags */ +static const struct { + const char *name; + int value; +} ltdb_valid_attr_flags[] = { + { "CASE_INSENSITIVE", LTDB_FLAG_CASE_INSENSITIVE }, + { "INTEGER", LTDB_FLAG_INTEGER }, + { "HIDDEN", LTDB_FLAG_HIDDEN }, + { "NONE", 0 }, + { NULL, 0 } +}; + + +/* + de-register any special handlers for @ATTRIBUTES +*/ +static void ltdb_attributes_unload(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_message *msg; + int i; + + if (ltdb->cache->attributes == NULL) { + /* no previously loaded attributes */ + return; + } + + msg = ltdb->cache->attributes; + for (i=0;i<msg->num_elements;i++) { + ldb_schema_attribute_remove(module->ldb, msg->elements[i].name); + } + + talloc_free(ltdb->cache->attributes); + ltdb->cache->attributes = NULL; +} + +/* + add up the attrib flags for a @ATTRIBUTES element +*/ +static int ltdb_attributes_flags(struct ldb_message_element *el, unsigned *v) +{ + int i; + unsigned value = 0; + for (i=0;i<el->num_values;i++) { + int j; + for (j=0;ltdb_valid_attr_flags[j].name;j++) { + if (strcmp(ltdb_valid_attr_flags[j].name, + (char *)el->values[i].data) == 0) { + value |= ltdb_valid_attr_flags[j].value; + break; + } + } + if (ltdb_valid_attr_flags[j].name == NULL) { + return -1; + } + } + *v = value; + return 0; +} + +/* + register any special handlers from @ATTRIBUTES +*/ +static int ltdb_attributes_load(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_message *msg = ltdb->cache->attributes; + struct ldb_dn *dn; + int i, r; + + dn = ldb_dn_new(module, module->ldb, LTDB_ATTRIBUTES); + if (dn == NULL) goto failed; + + r = ltdb_search_dn1(module, dn, msg); + talloc_free(dn); + if (r != LDB_SUCCESS && r != LDB_ERR_NO_SUCH_OBJECT) { + goto failed; + } + if (r == LDB_ERR_NO_SUCH_OBJECT) { + return 0; + } + /* mapping these flags onto ldap 'syntaxes' isn't strictly correct, + but its close enough for now */ + for (i=0;i<msg->num_elements;i++) { + unsigned flags; + const char *syntax; + const struct ldb_schema_syntax *s; + + if (ltdb_attributes_flags(&msg->elements[i], &flags) != 0) { + ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Invalid @ATTRIBUTES element for '%s'\n", msg->elements[i].name); + goto failed; + } + switch (flags & ~LTDB_FLAG_HIDDEN) { + case 0: + syntax = LDB_SYNTAX_OCTET_STRING; + break; + case LTDB_FLAG_CASE_INSENSITIVE: + syntax = LDB_SYNTAX_DIRECTORY_STRING; + break; + case LTDB_FLAG_INTEGER: + syntax = LDB_SYNTAX_INTEGER; + break; + default: + ldb_debug(module->ldb, LDB_DEBUG_ERROR, + "Invalid flag combination 0x%x for '%s' in @ATTRIBUTES\n", + flags, msg->elements[i].name); + goto failed; + } + + s = ldb_standard_syntax_by_name(module->ldb, syntax); + if (s == NULL) { + ldb_debug(module->ldb, LDB_DEBUG_ERROR, + "Invalid attribute syntax '%s' for '%s' in @ATTRIBUTES\n", + syntax, msg->elements[i].name); + goto failed; + } + + flags |= LDB_ATTR_FLAG_ALLOCATED; + if (ldb_schema_attribute_add_with_syntax(module->ldb, msg->elements[i].name, flags, s) != 0) { + goto failed; + } + } + + return 0; +failed: + return -1; +} + + +/* + initialise the baseinfo record +*/ +static int ltdb_baseinfo_init(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_message *msg; + struct ldb_message_element el; + struct ldb_val val; + int ret; + /* the initial sequence number must be different from the one + set in ltdb_cache_free(). Thanks to Jon for pointing this + out. */ + const char *initial_sequence_number = "1"; + + ltdb->sequence_number = atof(initial_sequence_number); + + msg = talloc(ltdb, struct ldb_message); + if (msg == NULL) { + goto failed; + } + + msg->num_elements = 1; + msg->elements = ⪙ + msg->dn = ldb_dn_new(msg, module->ldb, LTDB_BASEINFO); + if (!msg->dn) { + goto failed; + } + el.name = talloc_strdup(msg, LTDB_SEQUENCE_NUMBER); + if (!el.name) { + goto failed; + } + el.values = &val; + el.num_values = 1; + el.flags = 0; + val.data = (uint8_t *)talloc_strdup(msg, initial_sequence_number); + if (!val.data) { + goto failed; + } + val.length = 1; + + ret = ltdb_store(module, msg, TDB_INSERT); + + talloc_free(msg); + + return ret; + +failed: + talloc_free(msg); + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; +} + +/* + free any cache records + */ +static void ltdb_cache_free(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + + ltdb->sequence_number = 0; + talloc_free(ltdb->cache); + ltdb->cache = NULL; +} + +/* + force a cache reload +*/ +int ltdb_cache_reload(struct ldb_module *module) +{ + ltdb_attributes_unload(module); + ltdb_cache_free(module); + return ltdb_cache_load(module); +} + +/* + load the cache records +*/ +int ltdb_cache_load(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_dn *baseinfo_dn = NULL, *options_dn = NULL; + struct ldb_dn *indexlist_dn = NULL; + uint64_t seq; + struct ldb_message *baseinfo = NULL, *options = NULL; + int r; + + /* a very fast check to avoid extra database reads */ + if (ltdb->cache != NULL && + tdb_get_seqnum(ltdb->tdb) == ltdb->tdb_seqnum) { + return 0; + } + + if (ltdb->cache == NULL) { + ltdb->cache = talloc_zero(ltdb, struct ltdb_cache); + if (ltdb->cache == NULL) goto failed; + ltdb->cache->indexlist = talloc_zero(ltdb->cache, struct ldb_message); + ltdb->cache->attributes = talloc_zero(ltdb->cache, struct ldb_message); + if (ltdb->cache->indexlist == NULL || + ltdb->cache->attributes == NULL) { + goto failed; + } + } + + baseinfo = talloc(ltdb->cache, struct ldb_message); + if (baseinfo == NULL) goto failed; + + baseinfo_dn = ldb_dn_new(module, module->ldb, LTDB_BASEINFO); + if (baseinfo_dn == NULL) goto failed; + + r= ltdb_search_dn1(module, baseinfo_dn, baseinfo); + if (r != LDB_SUCCESS && r != LDB_ERR_NO_SUCH_OBJECT) { + goto failed; + } + + /* possibly initialise the baseinfo */ + if (r == LDB_ERR_NO_SUCH_OBJECT) { + if (ltdb_baseinfo_init(module) != LDB_SUCCESS) { + goto failed; + } + if (ltdb_search_dn1(module, baseinfo_dn, baseinfo) != LDB_SUCCESS) { + goto failed; + } + } + + ltdb->tdb_seqnum = tdb_get_seqnum(ltdb->tdb); + + /* if the current internal sequence number is the same as the one + in the database then assume the rest of the cache is OK */ + seq = ldb_msg_find_attr_as_uint64(baseinfo, LTDB_SEQUENCE_NUMBER, 0); + if (seq == ltdb->sequence_number) { + goto done; + } + ltdb->sequence_number = seq; + + /* Read an interpret database options */ + options = talloc(ltdb->cache, struct ldb_message); + if (options == NULL) goto failed; + + options_dn = ldb_dn_new(options, module->ldb, LTDB_OPTIONS); + if (options_dn == NULL) goto failed; + + r= ltdb_search_dn1(module, options_dn, options); + if (r != LDB_SUCCESS && r != LDB_ERR_NO_SUCH_OBJECT) { + goto failed; + } + + /* set flag for checking base DN on searches */ + if (r == LDB_SUCCESS) { + ltdb->check_base = ldb_msg_find_attr_as_bool(options, LTDB_CHECK_BASE, false); + } else { + ltdb->check_base = false; + } + + talloc_free(ltdb->cache->last_attribute.name); + memset(<db->cache->last_attribute, 0, sizeof(ltdb->cache->last_attribute)); + + ltdb_attributes_unload(module); + + talloc_free(ltdb->cache->indexlist); + + ltdb->cache->indexlist = talloc_zero(ltdb->cache, struct ldb_message); + ltdb->cache->attributes = talloc_zero(ltdb->cache, struct ldb_message); + if (ltdb->cache->indexlist == NULL || + ltdb->cache->attributes == NULL) { + goto failed; + } + + indexlist_dn = ldb_dn_new(module, module->ldb, LTDB_INDEXLIST); + if (indexlist_dn == NULL) goto failed; + + r = ltdb_search_dn1(module, indexlist_dn, ltdb->cache->indexlist); + if (r != LDB_SUCCESS && r != LDB_ERR_NO_SUCH_OBJECT) { + goto failed; + } + + if (ltdb_attributes_load(module) == -1) { + goto failed; + } + +done: + talloc_free(options); + talloc_free(baseinfo); + talloc_free(baseinfo_dn); + talloc_free(indexlist_dn); + return 0; + +failed: + talloc_free(options); + talloc_free(baseinfo); + talloc_free(baseinfo_dn); + talloc_free(indexlist_dn); + return -1; +} + + +/* + increase the sequence number to indicate a database change +*/ +int ltdb_increase_sequence_number(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_message *msg; + struct ldb_message_element el[2]; + struct ldb_val val; + struct ldb_val val_time; + time_t t = time(NULL); + char *s = NULL; + int ret; + + msg = talloc(ltdb, struct ldb_message); + if (msg == NULL) { + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + + s = talloc_asprintf(msg, "%llu", ltdb->sequence_number+1); + if (!s) { + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + + msg->num_elements = ARRAY_SIZE(el); + msg->elements = el; + msg->dn = ldb_dn_new(msg, module->ldb, LTDB_BASEINFO); + if (msg->dn == NULL) { + talloc_free(msg); + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + el[0].name = talloc_strdup(msg, LTDB_SEQUENCE_NUMBER); + if (el[0].name == NULL) { + talloc_free(msg); + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + el[0].values = &val; + el[0].num_values = 1; + el[0].flags = LDB_FLAG_MOD_REPLACE; + val.data = (uint8_t *)s; + val.length = strlen(s); + + el[1].name = talloc_strdup(msg, LTDB_MOD_TIMESTAMP); + if (el[1].name == NULL) { + talloc_free(msg); + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + el[1].values = &val_time; + el[1].num_values = 1; + el[1].flags = LDB_FLAG_MOD_REPLACE; + + s = ldb_timestring(msg, t); + if (s == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + val_time.data = (uint8_t *)s; + val_time.length = strlen(s); + + ret = ltdb_modify_internal(module, msg); + + talloc_free(msg); + + if (ret == LDB_SUCCESS) { + ltdb->sequence_number += 1; + } + + /* updating the tdb_seqnum here avoids us reloading the cache + records due to our own modification */ + ltdb->tdb_seqnum = tdb_get_seqnum(ltdb->tdb); + + return ret; +} + +int ltdb_check_at_attributes_values(const struct ldb_val *value) +{ + int i; + + for (i = 0; ltdb_valid_attr_flags[i].name != NULL; i++) { + if ((strcmp(ltdb_valid_attr_flags[i].name, (char *)value->data) == 0)) { + return 0; + } + } + + return -1; +} + diff --git a/ldb/ldb_tdb/ldb_index.c b/ldb/ldb_tdb/ldb_index.c new file mode 100644 index 00000000..269305a4 --- /dev/null +++ b/ldb/ldb_tdb/ldb_index.c @@ -0,0 +1,1273 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2004 + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Name: ldb + * + * Component: ldb tdb backend - indexing + * + * Description: indexing routines for ldb tdb backend + * + * Author: Andrew Tridgell + */ + +#include "ldb_includes.h" + +#include "ldb_tdb.h" + +/* + find an element in a list, using the given comparison function and + assuming that the list is already sorted using comp_fn + + return -1 if not found, or the index of the first occurance of needle if found +*/ +static int ldb_list_find(const void *needle, + const void *base, size_t nmemb, size_t size, + comparison_fn_t comp_fn) +{ + const char *base_p = (const char *)base; + size_t min_i, max_i, test_i; + + if (nmemb == 0) { + return -1; + } + + min_i = 0; + max_i = nmemb-1; + + while (min_i < max_i) { + int r; + + test_i = (min_i + max_i) / 2; + /* the following cast looks strange, but is + correct. The key to understanding it is that base_p + is a pointer to an array of pointers, so we have to + dereference it after casting to void **. The strange + const in the middle gives us the right type of pointer + after the dereference (tridge) */ + r = comp_fn(needle, *(void * const *)(base_p + (size * test_i))); + if (r == 0) { + /* scan back for first element */ + while (test_i > 0 && + comp_fn(needle, *(void * const *)(base_p + (size * (test_i-1)))) == 0) { + test_i--; + } + return test_i; + } + if (r < 0) { + if (test_i == 0) { + return -1; + } + max_i = test_i - 1; + } + if (r > 0) { + min_i = test_i + 1; + } + } + + if (comp_fn(needle, *(void * const *)(base_p + (size * min_i))) == 0) { + return min_i; + } + + return -1; +} + +struct dn_list { + unsigned int count; + char **dn; +}; + +/* + return the dn key to be used for an index + caller frees +*/ +static struct ldb_dn *ltdb_index_key(struct ldb_context *ldb, + const char *attr, const struct ldb_val *value) +{ + struct ldb_dn *ret; + struct ldb_val v; + const struct ldb_schema_attribute *a; + char *attr_folded; + int r; + + attr_folded = ldb_attr_casefold(ldb, attr); + if (!attr_folded) { + return NULL; + } + + a = ldb_schema_attribute_by_name(ldb, attr); + r = a->syntax->canonicalise_fn(ldb, ldb, value, &v); + if (r != LDB_SUCCESS) { + const char *errstr = ldb_errstring(ldb); + /* canonicalisation can be refused. For example, + a attribute that takes wildcards will refuse to canonicalise + if the value contains a wildcard */ + ldb_asprintf_errstring(ldb, "Failed to create index key for attribute '%s':%s%s%s", + attr, ldb_strerror(r), (errstr?":":""), (errstr?errstr:"")); + talloc_free(attr_folded); + return NULL; + } + if (ldb_should_b64_encode(&v)) { + char *vstr = ldb_base64_encode(ldb, (char *)v.data, v.length); + if (!vstr) return NULL; + ret = ldb_dn_new_fmt(ldb, ldb, "%s:%s::%s", LTDB_INDEX, attr_folded, vstr); + talloc_free(vstr); + } else { + ret = ldb_dn_new_fmt(ldb, ldb, "%s:%s:%.*s", LTDB_INDEX, attr_folded, (int)v.length, (char *)v.data); + } + + if (v.data != value->data) { + talloc_free(v.data); + } + talloc_free(attr_folded); + + return ret; +} + +/* + see if a attribute value is in the list of indexed attributes +*/ +static int ldb_msg_find_idx(const struct ldb_message *msg, const char *attr, + unsigned int *v_idx, const char *key) +{ + unsigned int i, j; + for (i=0;i<msg->num_elements;i++) { + if (ldb_attr_cmp(msg->elements[i].name, key) == 0) { + const struct ldb_message_element *el = &msg->elements[i]; + + if (attr == NULL) { + /* in this case we are just looking to see if key is present, + we are not spearching for a specific index */ + return 0; + } + + for (j=0;j<el->num_values;j++) { + if (ldb_attr_cmp((char *)el->values[j].data, attr) == 0) { + if (v_idx) { + *v_idx = j; + } + return i; + } + } + } + } + return -1; +} + +/* used in sorting dn lists */ +static int list_cmp(const char **s1, const char **s2) +{ + return strcmp(*s1, *s2); +} + +/* + return a list of dn's that might match a simple indexed search or + */ +static int ltdb_index_dn_simple(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + struct ldb_context *ldb = module->ldb; + struct ldb_dn *dn; + int ret; + unsigned int i, j; + struct ldb_message *msg; + + list->count = 0; + list->dn = NULL; + + /* if the attribute isn't in the list of indexed attributes then + this node needs a full search */ + if (ldb_msg_find_idx(index_list, tree->u.equality.attr, NULL, LTDB_IDXATTR) == -1) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* the attribute is indexed. Pull the list of DNs that match the + search criterion */ + dn = ltdb_index_key(ldb, tree->u.equality.attr, &tree->u.equality.value); + if (!dn) return LDB_ERR_OPERATIONS_ERROR; + + msg = talloc(list, struct ldb_message); + if (msg == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_search_dn1(module, dn, msg); + talloc_free(dn); + if (ret != LDB_SUCCESS) { + return ret; + } + + for (i=0;i<msg->num_elements;i++) { + struct ldb_message_element *el; + + if (strcmp(msg->elements[i].name, LTDB_IDX) != 0) { + continue; + } + + el = &msg->elements[i]; + + list->dn = talloc_array(list, char *, el->num_values); + if (!list->dn) { + talloc_free(msg); + return LDB_ERR_OPERATIONS_ERROR; + } + + for (j=0;j<el->num_values;j++) { + list->dn[list->count] = + talloc_strdup(list->dn, (char *)el->values[j].data); + if (!list->dn[list->count]) { + talloc_free(msg); + return LDB_ERR_OPERATIONS_ERROR; + } + list->count++; + } + } + + talloc_free(msg); + + if (list->count > 1) { + qsort(list->dn, list->count, sizeof(char *), (comparison_fn_t) list_cmp); + } + + return LDB_SUCCESS; +} + + +static int list_union(struct ldb_context *, struct dn_list *, const struct dn_list *); + +/* + return a list of dn's that might match a leaf indexed search + */ +static int ltdb_index_dn_leaf(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + if (ldb_attr_dn(tree->u.equality.attr) == 0) { + list->dn = talloc_array(list, char *, 1); + if (list->dn == NULL) { + ldb_oom(module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + list->dn[0] = talloc_strdup(list->dn, (char *)tree->u.equality.value.data); + if (list->dn[0] == NULL) { + ldb_oom(module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + list->count = 1; + return LDB_SUCCESS; + } + return ltdb_index_dn_simple(module, tree, index_list, list); +} + + +/* + list intersection + list = list & list2 + relies on the lists being sorted +*/ +static int list_intersect(struct ldb_context *ldb, + struct dn_list *list, const struct dn_list *list2) +{ + struct dn_list *list3; + unsigned int i; + + if (list->count == 0 || list2->count == 0) { + /* 0 & X == 0 */ + return LDB_ERR_NO_SUCH_OBJECT; + } + + list3 = talloc(ldb, struct dn_list); + if (list3 == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + list3->dn = talloc_array(list3, char *, list->count); + if (!list3->dn) { + talloc_free(list3); + return LDB_ERR_OPERATIONS_ERROR; + } + list3->count = 0; + + for (i=0;i<list->count;i++) { + if (ldb_list_find(list->dn[i], list2->dn, list2->count, + sizeof(char *), (comparison_fn_t)strcmp) != -1) { + list3->dn[list3->count] = talloc_move(list3->dn, &list->dn[i]); + list3->count++; + } else { + talloc_free(list->dn[i]); + } + } + + talloc_free(list->dn); + list->dn = talloc_move(list, &list3->dn); + list->count = list3->count; + talloc_free(list3); + + return LDB_ERR_NO_SUCH_OBJECT; +} + + +/* + list union + list = list | list2 + relies on the lists being sorted +*/ +static int list_union(struct ldb_context *ldb, + struct dn_list *list, const struct dn_list *list2) +{ + unsigned int i; + char **d; + unsigned int count = list->count; + + if (list->count == 0 && list2->count == 0) { + /* 0 | 0 == 0 */ + return LDB_ERR_NO_SUCH_OBJECT; + } + + d = talloc_realloc(list, list->dn, char *, list->count + list2->count); + if (!d) { + return LDB_ERR_OPERATIONS_ERROR; + } + list->dn = d; + + for (i=0;i<list2->count;i++) { + if (ldb_list_find(list2->dn[i], list->dn, count, + sizeof(char *), (comparison_fn_t)strcmp) == -1) { + list->dn[list->count] = talloc_strdup(list->dn, list2->dn[i]); + if (!list->dn[list->count]) { + return LDB_ERR_OPERATIONS_ERROR; + } + list->count++; + } + } + + if (list->count != count) { + qsort(list->dn, list->count, sizeof(char *), (comparison_fn_t)list_cmp); + } + + return LDB_ERR_NO_SUCH_OBJECT; +} + +static int ltdb_index_dn(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list); + + +/* + OR two index results + */ +static int ltdb_index_dn_or(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + struct ldb_context *ldb = module->ldb; + unsigned int i; + int ret; + + ret = LDB_ERR_OPERATIONS_ERROR; + list->dn = NULL; + list->count = 0; + + for (i=0;i<tree->u.list.num_elements;i++) { + struct dn_list *list2; + int v; + + list2 = talloc(module, struct dn_list); + if (list2 == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + v = ltdb_index_dn(module, tree->u.list.elements[i], index_list, list2); + + if (v == LDB_ERR_NO_SUCH_OBJECT) { + /* 0 || X == X */ + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + ret = v; + } + talloc_free(list2); + continue; + } + + if (v != LDB_SUCCESS && v != LDB_ERR_NO_SUCH_OBJECT) { + /* 1 || X == 1 */ + talloc_free(list->dn); + talloc_free(list2); + return v; + } + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + ret = LDB_SUCCESS; + list->dn = talloc_move(list, &list2->dn); + list->count = list2->count; + } else { + if (list_union(ldb, list, list2) == -1) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + ret = LDB_SUCCESS; + } + talloc_free(list2); + } + + if (list->count == 0) { + return LDB_ERR_NO_SUCH_OBJECT; + } + + return ret; +} + + +/* + NOT an index results + */ +static int ltdb_index_dn_not(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + /* the only way to do an indexed not would be if we could + negate the not via another not or if we knew the total + number of database elements so we could know that the + existing expression covered the whole database. + + instead, we just give up, and rely on a full index scan + (unless an outer & manages to reduce the list) + */ + return LDB_ERR_OPERATIONS_ERROR; +} + +/* + AND two index results + */ +static int ltdb_index_dn_and(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + struct ldb_context *ldb = module->ldb; + unsigned int i; + int ret; + + ret = LDB_ERR_OPERATIONS_ERROR; + list->dn = NULL; + list->count = 0; + + for (i=0;i<tree->u.list.num_elements;i++) { + struct dn_list *list2; + int v; + + list2 = talloc(module, struct dn_list); + if (list2 == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + v = ltdb_index_dn(module, tree->u.list.elements[i], index_list, list2); + + if (v == LDB_ERR_NO_SUCH_OBJECT) { + /* 0 && X == 0 */ + talloc_free(list->dn); + talloc_free(list2); + return LDB_ERR_NO_SUCH_OBJECT; + } + + if (v != LDB_SUCCESS && v != LDB_ERR_NO_SUCH_OBJECT) { + talloc_free(list2); + continue; + } + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + ret = LDB_SUCCESS; + talloc_free(list->dn); + list->dn = talloc_move(list, &list2->dn); + list->count = list2->count; + } else { + if (list_intersect(ldb, list, list2) == -1) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + } + + talloc_free(list2); + + if (list->count == 0) { + talloc_free(list->dn); + return LDB_ERR_NO_SUCH_OBJECT; + } + } + + return ret; +} + +/* + AND index results and ONE level special index + */ +static int ltdb_index_dn_one(struct ldb_module *module, + struct ldb_dn *parent_dn, + struct dn_list *list) +{ + struct ldb_context *ldb = module->ldb; + struct dn_list *list2; + struct ldb_message *msg; + struct ldb_dn *key; + struct ldb_val val; + unsigned int i, j; + int ret; + + list2 = talloc_zero(module, struct dn_list); + if (list2 == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* the attribute is indexed. Pull the list of DNs that match the + search criterion */ + val.data = (uint8_t *)((uintptr_t)ldb_dn_get_casefold(parent_dn)); + val.length = strlen((char *)val.data); + key = ltdb_index_key(ldb, LTDB_IDXONE, &val); + if (!key) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + + msg = talloc(list2, struct ldb_message); + if (msg == NULL) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_search_dn1(module, key, msg); + talloc_free(key); + if (ret != LDB_SUCCESS) { + return ret; + } + + for (i = 0; i < msg->num_elements; i++) { + struct ldb_message_element *el; + + if (strcmp(msg->elements[i].name, LTDB_IDX) != 0) { + continue; + } + + el = &msg->elements[i]; + + list2->dn = talloc_array(list2, char *, el->num_values); + if (!list2->dn) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + + for (j = 0; j < el->num_values; j++) { + list2->dn[list2->count] = talloc_strdup(list2->dn, (char *)el->values[j].data); + if (!list2->dn[list2->count]) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + list2->count++; + } + } + + if (list2->count == 0) { + talloc_free(list2); + return LDB_ERR_NO_SUCH_OBJECT; + } + + if (list2->count > 1) { + qsort(list2->dn, list2->count, sizeof(char *), (comparison_fn_t) list_cmp); + } + + if (list->count > 0) { + if (list_intersect(ldb, list, list2) == -1) { + talloc_free(list2); + return LDB_ERR_OPERATIONS_ERROR; + } + + if (list->count == 0) { + talloc_free(list->dn); + talloc_free(list2); + return LDB_ERR_NO_SUCH_OBJECT; + } + } else { + list->dn = talloc_move(list, &list2->dn); + list->count = list2->count; + } + + talloc_free(list2); + + return LDB_SUCCESS; +} + +/* + return a list of dn's that might match a indexed search or + an error. return LDB_ERR_NO_SUCH_OBJECT for no matches, or LDB_SUCCESS for matches + */ +static int ltdb_index_dn(struct ldb_module *module, + const struct ldb_parse_tree *tree, + const struct ldb_message *index_list, + struct dn_list *list) +{ + int ret = LDB_ERR_OPERATIONS_ERROR; + + switch (tree->operation) { + case LDB_OP_AND: + ret = ltdb_index_dn_and(module, tree, index_list, list); + break; + + case LDB_OP_OR: + ret = ltdb_index_dn_or(module, tree, index_list, list); + break; + + case LDB_OP_NOT: + ret = ltdb_index_dn_not(module, tree, index_list, list); + break; + + case LDB_OP_EQUALITY: + ret = ltdb_index_dn_leaf(module, tree, index_list, list); + break; + + case LDB_OP_SUBSTRING: + case LDB_OP_GREATER: + case LDB_OP_LESS: + case LDB_OP_PRESENT: + case LDB_OP_APPROX: + case LDB_OP_EXTENDED: + /* we can't index with fancy bitops yet */ + ret = LDB_ERR_OPERATIONS_ERROR; + break; + } + + return ret; +} + +/* + filter a candidate dn_list from an indexed search into a set of results + extracting just the given attributes +*/ +static int ltdb_index_filter(const struct dn_list *dn_list, + struct ldb_handle *handle) +{ + struct ltdb_context *ac = talloc_get_type(handle->private_data, struct ltdb_context); + struct ldb_reply *ares = NULL; + unsigned int i; + + for (i = 0; i < dn_list->count; i++) { + struct ldb_dn *dn; + int ret; + + ares = talloc_zero(ac, struct ldb_reply); + if (!ares) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + return LDB_ERR_OPERATIONS_ERROR; + } + + ares->message = ldb_msg_new(ares); + if (!ares->message) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + talloc_free(ares); + return LDB_ERR_OPERATIONS_ERROR; + } + + + dn = ldb_dn_new(ares->message, ac->module->ldb, dn_list->dn[i]); + if (dn == NULL) { + talloc_free(ares); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_search_dn1(ac->module, dn, ares->message); + talloc_free(dn); + if (ret == LDB_ERR_NO_SUCH_OBJECT) { + /* the record has disappeared? yes, this can happen */ + talloc_free(ares); + continue; + } + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + /* an internal error */ + talloc_free(ares); + return LDB_ERR_OPERATIONS_ERROR; + } + + if (!ldb_match_msg(ac->module->ldb, ares->message, ac->tree, ac->base, ac->scope)) { + talloc_free(ares); + continue; + } + + /* filter the attributes that the user wants */ + ret = ltdb_filter_attrs(ares->message, ac->attrs); + + if (ret == -1) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + talloc_free(ares); + return LDB_ERR_OPERATIONS_ERROR; + } + + ares->type = LDB_REPLY_ENTRY; + handle->state = LDB_ASYNC_PENDING; + handle->status = ac->callback(ac->module->ldb, ac->context, ares); + + if (handle->status != LDB_SUCCESS) { + handle->state = LDB_ASYNC_DONE; + return handle->status; + } + } + + return LDB_SUCCESS; +} + +/* + search the database with a LDAP-like expression using indexes + returns -1 if an indexed search is not possible, in which + case the caller should call ltdb_search_full() +*/ +int ltdb_search_indexed(struct ldb_handle *handle) +{ + struct ltdb_context *ac = talloc_get_type(handle->private_data, struct ltdb_context); + struct ltdb_private *ltdb = talloc_get_type(ac->module->private_data, struct ltdb_private); + struct dn_list *dn_list; + int ret, idxattr, idxone; + + idxattr = idxone = 0; + ret = ldb_msg_find_idx(ltdb->cache->indexlist, NULL, NULL, LTDB_IDXATTR); + if (ret == 0 ) { + idxattr = 1; + } + + /* We do one level indexing only if requested */ + ret = ldb_msg_find_idx(ltdb->cache->indexlist, NULL, NULL, LTDB_IDXONE); + if (ret == 0 ) { + idxone = 1; + } + + if ((ac->scope == LDB_SCOPE_ONELEVEL && (idxattr+idxone == 0)) || + (ac->scope == LDB_SCOPE_SUBTREE && idxattr == 0)) { + /* no indexes? must do full search */ + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = LDB_ERR_OPERATIONS_ERROR; + + dn_list = talloc_zero(handle, struct dn_list); + if (dn_list == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + if (ac->scope == LDB_SCOPE_BASE) { + /* with BASE searches only one DN can match */ + dn_list->dn = talloc_array(dn_list, char *, 1); + if (dn_list->dn == NULL) { + ldb_oom(ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + dn_list->dn[0] = ldb_dn_alloc_linearized(dn_list, ac->base); + if (dn_list->dn[0] == NULL) { + ldb_oom(ac->module->ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + dn_list->count = 1; + ret = LDB_SUCCESS; + } + + if (ac->scope != LDB_SCOPE_BASE && idxattr == 1) { + ret = ltdb_index_dn(ac->module, ac->tree, ltdb->cache->indexlist, dn_list); + + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + talloc_free(dn_list); + return ret; + } + } + + if (ac->scope == LDB_SCOPE_ONELEVEL && idxone == 1) { + ret = ltdb_index_dn_one(ac->module, ac->base, dn_list); + } + + if (ret == LDB_SUCCESS) { + /* we've got a candidate list - now filter by the full tree + and extract the needed attributes */ + ret = ltdb_index_filter(dn_list, handle); + handle->status = ret; + handle->state = LDB_ASYNC_DONE; + } + + talloc_free(dn_list); + + return ret; +} + +/* + add a index element where this is the first indexed DN for this value +*/ +static int ltdb_index_add1_new(struct ldb_context *ldb, + struct ldb_message *msg, + const char *dn) +{ + struct ldb_message_element *el; + + /* add another entry */ + el = talloc_realloc(msg, msg->elements, + struct ldb_message_element, msg->num_elements+1); + if (!el) { + return LDB_ERR_OPERATIONS_ERROR; + } + + msg->elements = el; + msg->elements[msg->num_elements].name = talloc_strdup(msg->elements, LTDB_IDX); + if (!msg->elements[msg->num_elements].name) { + return LDB_ERR_OPERATIONS_ERROR; + } + msg->elements[msg->num_elements].num_values = 0; + msg->elements[msg->num_elements].values = talloc(msg->elements, struct ldb_val); + if (!msg->elements[msg->num_elements].values) { + return LDB_ERR_OPERATIONS_ERROR; + } + msg->elements[msg->num_elements].values[0].length = strlen(dn); + msg->elements[msg->num_elements].values[0].data = discard_const_p(uint8_t, dn); + msg->elements[msg->num_elements].num_values = 1; + msg->num_elements++; + + return LDB_SUCCESS; +} + + +/* + add a index element where this is not the first indexed DN for this + value +*/ +static int ltdb_index_add1_add(struct ldb_context *ldb, + struct ldb_message *msg, + int idx, + const char *dn) +{ + struct ldb_val *v2; + unsigned int i; + + /* for multi-valued attributes we can end up with repeats */ + for (i=0;i<msg->elements[idx].num_values;i++) { + if (strcmp(dn, (char *)msg->elements[idx].values[i].data) == 0) { + return LDB_SUCCESS; + } + } + + v2 = talloc_realloc(msg->elements, msg->elements[idx].values, + struct ldb_val, + msg->elements[idx].num_values+1); + if (!v2) { + return LDB_ERR_OPERATIONS_ERROR; + } + msg->elements[idx].values = v2; + + msg->elements[idx].values[msg->elements[idx].num_values].length = strlen(dn); + msg->elements[idx].values[msg->elements[idx].num_values].data = discard_const_p(uint8_t, dn); + msg->elements[idx].num_values++; + + return LDB_SUCCESS; +} + +/* + add an index entry for one message element +*/ +static int ltdb_index_add1(struct ldb_module *module, const char *dn, + struct ldb_message_element *el, int v_idx) +{ + struct ldb_context *ldb = module->ldb; + struct ldb_message *msg; + struct ldb_dn *dn_key; + int ret; + unsigned int i; + + msg = talloc(module, struct ldb_message); + if (msg == NULL) { + errno = ENOMEM; + return LDB_ERR_OPERATIONS_ERROR; + } + + dn_key = ltdb_index_key(ldb, el->name, &el->values[v_idx]); + if (!dn_key) { + talloc_free(msg); + return LDB_ERR_OPERATIONS_ERROR; + } + talloc_steal(msg, dn_key); + + ret = ltdb_search_dn1(module, dn_key, msg); + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + talloc_free(msg); + return ret; + } + + if (ret == LDB_ERR_NO_SUCH_OBJECT) { + msg->dn = dn_key; + msg->num_elements = 0; + msg->elements = NULL; + } + + for (i=0;i<msg->num_elements;i++) { + if (strcmp(LTDB_IDX, msg->elements[i].name) == 0) { + break; + } + } + + if (i == msg->num_elements) { + ret = ltdb_index_add1_new(ldb, msg, dn); + } else { + ret = ltdb_index_add1_add(ldb, msg, i, dn); + } + + if (ret == LDB_SUCCESS) { + ret = ltdb_store(module, msg, TDB_REPLACE); + } + + talloc_free(msg); + + return ret; +} + +static int ltdb_index_add0(struct ldb_module *module, const char *dn, + struct ldb_message_element *elements, int num_el) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + int ret; + unsigned int i, j; + + if (dn[0] == '@') { + return LDB_SUCCESS; + } + + if (ltdb->cache->indexlist->num_elements == 0) { + /* no indexed fields */ + return LDB_SUCCESS; + } + + for (i = 0; i < num_el; i++) { + ret = ldb_msg_find_idx(ltdb->cache->indexlist, elements[i].name, + NULL, LTDB_IDXATTR); + if (ret == -1) { + continue; + } + for (j = 0; j < elements[i].num_values; j++) { + ret = ltdb_index_add1(module, dn, &elements[i], j); + if (ret != LDB_SUCCESS) { + return ret; + } + } + } + + return LDB_SUCCESS; +} + +/* + add the index entries for a new record +*/ +int ltdb_index_add(struct ldb_module *module, const struct ldb_message *msg) +{ + const char *dn; + int ret; + + dn = ldb_dn_get_linearized(msg->dn); + if (dn == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_index_add0(module, dn, msg->elements, msg->num_elements); + + return ret; +} + + +/* + delete an index entry for one message element +*/ +int ltdb_index_del_value(struct ldb_module *module, const char *dn, + struct ldb_message_element *el, int v_idx) +{ + struct ldb_context *ldb = module->ldb; + struct ldb_message *msg; + struct ldb_dn *dn_key; + int ret, i; + unsigned int j; + + if (dn[0] == '@') { + return LDB_SUCCESS; + } + + dn_key = ltdb_index_key(ldb, el->name, &el->values[v_idx]); + if (!dn_key) { + return LDB_ERR_OPERATIONS_ERROR; + } + + msg = talloc(dn_key, struct ldb_message); + if (msg == NULL) { + talloc_free(dn_key); + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_search_dn1(module, dn_key, msg); + if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) { + talloc_free(dn_key); + return ret; + } + + if (ret == LDB_ERR_NO_SUCH_OBJECT) { + /* it wasn't indexed. Did we have an earlier error? If we did then + its gone now */ + talloc_free(dn_key); + return LDB_SUCCESS; + } + + i = ldb_msg_find_idx(msg, dn, &j, LTDB_IDX); + if (i == -1) { + ldb_debug(ldb, LDB_DEBUG_ERROR, + "ERROR: dn %s not found in %s\n", dn, + ldb_dn_get_linearized(dn_key)); + /* it ain't there. hmmm */ + talloc_free(dn_key); + return LDB_SUCCESS; + } + + if (j != msg->elements[i].num_values - 1) { + memmove(&msg->elements[i].values[j], + &msg->elements[i].values[j+1], + (msg->elements[i].num_values-(j+1)) * + sizeof(msg->elements[i].values[0])); + } + msg->elements[i].num_values--; + + if (msg->elements[i].num_values == 0) { + ret = ltdb_delete_noindex(module, dn_key); + } else { + ret = ltdb_store(module, msg, TDB_REPLACE); + } + + talloc_free(dn_key); + + return ret; +} + +/* + delete the index entries for a record + return -1 on failure +*/ +int ltdb_index_del(struct ldb_module *module, const struct ldb_message *msg) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + int ret; + const char *dn; + unsigned int i, j; + + /* find the list of indexed fields */ + if (ltdb->cache->indexlist->num_elements == 0) { + /* no indexed fields */ + return LDB_SUCCESS; + } + + if (ldb_dn_is_special(msg->dn)) { + return LDB_SUCCESS; + } + + dn = ldb_dn_get_linearized(msg->dn); + if (dn == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + for (i = 0; i < msg->num_elements; i++) { + ret = ldb_msg_find_idx(ltdb->cache->indexlist, msg->elements[i].name, + NULL, LTDB_IDXATTR); + if (ret == -1) { + continue; + } + for (j = 0; j < msg->elements[i].num_values; j++) { + ret = ltdb_index_del_value(module, dn, &msg->elements[i], j); + if (ret != LDB_SUCCESS) { + return ret; + } + } + } + + return LDB_SUCCESS; +} + +/* + handle special index for one level searches +*/ +int ltdb_index_one(struct ldb_module *module, const struct ldb_message *msg, int add) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + struct ldb_message_element el; + struct ldb_val val; + struct ldb_dn *pdn; + const char *dn; + int ret; + + /* We index for ONE Level only if requested */ + ret = ldb_msg_find_idx(ltdb->cache->indexlist, NULL, NULL, LTDB_IDXONE); + if (ret != 0) { + return LDB_SUCCESS; + } + + pdn = ldb_dn_get_parent(module, msg->dn); + if (pdn == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + dn = ldb_dn_get_linearized(msg->dn); + if (dn == NULL) { + talloc_free(pdn); + return LDB_ERR_OPERATIONS_ERROR; + } + + val.data = (uint8_t *)((uintptr_t)ldb_dn_get_casefold(pdn)); + if (val.data == NULL) { + talloc_free(pdn); + return LDB_ERR_OPERATIONS_ERROR; + } + + val.length = strlen((char *)val.data); + el.name = LTDB_IDXONE; + el.values = &val; + el.num_values = 1; + + if (add) { + ret = ltdb_index_add1(module, dn, &el, 0); + } else { /* delete */ + ret = ltdb_index_del_value(module, dn, &el, 0); + } + + talloc_free(pdn); + + return ret; +} + + +/* + traversal function that deletes all @INDEX records +*/ +static int delete_index(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *state) +{ + const char *dn = "DN=" LTDB_INDEX ":"; + if (strncmp((char *)key.dptr, dn, strlen(dn)) == 0) { + return tdb_delete(tdb, key); + } + return 0; +} + +/* + traversal function that adds @INDEX records during a re index +*/ +static int re_index(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *state) +{ + struct ldb_module *module = (struct ldb_module *)state; + struct ldb_message *msg; + const char *dn = NULL; + int ret; + TDB_DATA key2; + + if (strncmp((char *)key.dptr, "DN=@", 4) == 0 || + strncmp((char *)key.dptr, "DN=", 3) != 0) { + return 0; + } + + msg = talloc(module, struct ldb_message); + if (msg == NULL) { + return -1; + } + + ret = ltdb_unpack_data(module, &data, msg); + if (ret != 0) { + talloc_free(msg); + return -1; + } + + /* check if the DN key has changed, perhaps due to the + case insensitivity of an element changing */ + key2 = ltdb_key(module, msg->dn); + if (key2.dptr == NULL) { + /* probably a corrupt record ... darn */ + ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Invalid DN in re_index: %s\n", + ldb_dn_get_linearized(msg->dn)); + talloc_free(msg); + return 0; + } + if (strcmp((char *)key2.dptr, (char *)key.dptr) != 0) { + tdb_delete(tdb, key); + tdb_store(tdb, key2, data, 0); + } + talloc_free(key2.dptr); + + if (msg->dn == NULL) { + dn = (char *)key.dptr + 3; + } else { + dn = ldb_dn_get_linearized(msg->dn); + } + + ret = ltdb_index_one(module, msg, 1); + if (ret == LDB_SUCCESS) { + ret = ltdb_index_add0(module, dn, msg->elements, msg->num_elements); + } else { + ldb_debug(module->ldb, LDB_DEBUG_ERROR, + "Adding special ONE LEVEL index failed (%s)!\n", + ldb_dn_get_linearized(msg->dn)); + } + + talloc_free(msg); + + if (ret != LDB_SUCCESS) return -1; + + return 0; +} + +/* + force a complete reindex of the database +*/ +int ltdb_reindex(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + int ret; + + if (ltdb_cache_reload(module) != 0) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* first traverse the database deleting any @INDEX records */ + ret = tdb_traverse(ltdb->tdb, delete_index, NULL); + if (ret == -1) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* if we don't have indexes we have nothing todo */ + if (ltdb->cache->indexlist->num_elements == 0) { + return LDB_SUCCESS; + } + + /* now traverse adding any indexes for normal LDB records */ + ret = tdb_traverse(ltdb->tdb, re_index, module); + if (ret == -1) { + return LDB_ERR_OPERATIONS_ERROR; + } + + return LDB_SUCCESS; +} diff --git a/ldb/ldb_tdb/ldb_pack.c b/ldb/ldb_tdb/ldb_pack.c new file mode 100644 index 00000000..afb07dcb --- /dev/null +++ b/ldb/ldb_tdb/ldb_pack.c @@ -0,0 +1,289 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2004 + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Name: ldb + * + * Component: ldb pack/unpack + * + * Description: pack/unpack routines for ldb messages as key/value blobs + * + * Author: Andrew Tridgell + */ + +#include "ldb_includes.h" +#include "ldb_tdb.h" + +/* change this if the data format ever changes */ +#define LTDB_PACKING_FORMAT 0x26011967 + +/* old packing formats */ +#define LTDB_PACKING_FORMAT_NODN 0x26011966 + +/* use a portable integer format */ +static void put_uint32(uint8_t *p, int ofs, unsigned int val) +{ + p += ofs; + p[0] = val&0xFF; + p[1] = (val>>8) & 0xFF; + p[2] = (val>>16) & 0xFF; + p[3] = (val>>24) & 0xFF; +} + +static unsigned int pull_uint32(uint8_t *p, int ofs) +{ + p += ofs; + return p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24); +} + +static int attribute_storable_values(const struct ldb_message_element *el) +{ + if (el->num_values == 0) return 0; + + if (ldb_attr_cmp(el->name, "dn") == 0) return 0; + + if (ldb_attr_cmp(el->name, "distinguishedName") == 0) return 0; + + return el->num_values; +} + +/* + pack a ldb message into a linear buffer in a TDB_DATA + + note that this routine avoids saving elements with zero values, + as these are equivalent to having no element + + caller frees the data buffer after use +*/ +int ltdb_pack_data(struct ldb_module *module, + const struct ldb_message *message, + struct TDB_DATA *data) +{ + struct ldb_context *ldb = module->ldb; + unsigned int i, j, real_elements=0; + size_t size; + const char *dn; + uint8_t *p; + size_t len; + + dn = ldb_dn_get_linearized(message->dn); + if (dn == NULL) { + errno = ENOMEM; + return -1; + } + + /* work out how big it needs to be */ + size = 8; + + size += 1 + strlen(dn); + + for (i=0;i<message->num_elements;i++) { + if (attribute_storable_values(&message->elements[i]) == 0) { + continue; + } + + real_elements++; + + size += 1 + strlen(message->elements[i].name) + 4; + for (j=0;j<message->elements[i].num_values;j++) { + size += 4 + message->elements[i].values[j].length + 1; + } + } + + /* allocate it */ + data->dptr = talloc_array(ldb, uint8_t, size); + if (!data->dptr) { + errno = ENOMEM; + return -1; + } + data->dsize = size; + + p = data->dptr; + put_uint32(p, 0, LTDB_PACKING_FORMAT); + put_uint32(p, 4, real_elements); + p += 8; + + /* the dn needs to be packed so we can be case preserving + while hashing on a case folded dn */ + len = strlen(dn); + memcpy(p, dn, len+1); + p += len + 1; + + for (i=0;i<message->num_elements;i++) { + if (attribute_storable_values(&message->elements[i]) == 0) { + continue; + } + len = strlen(message->elements[i].name); + memcpy(p, message->elements[i].name, len+1); + p += len + 1; + put_uint32(p, 0, message->elements[i].num_values); + p += 4; + for (j=0;j<message->elements[i].num_values;j++) { + put_uint32(p, 0, message->elements[i].values[j].length); + memcpy(p+4, message->elements[i].values[j].data, + message->elements[i].values[j].length); + p[4+message->elements[i].values[j].length] = 0; + p += 4 + message->elements[i].values[j].length + 1; + } + } + + return 0; +} + +/* + unpack a ldb message from a linear buffer in TDB_DATA + + Free with ltdb_unpack_data_free() +*/ +int ltdb_unpack_data(struct ldb_module *module, + const struct TDB_DATA *data, + struct ldb_message *message) +{ + struct ldb_context *ldb = module->ldb; + uint8_t *p; + unsigned int remaining; + unsigned int i, j; + unsigned format; + size_t len; + + message->elements = NULL; + + p = data->dptr; + if (data->dsize < 8) { + errno = EIO; + goto failed; + } + + format = pull_uint32(p, 0); + message->num_elements = pull_uint32(p, 4); + p += 8; + + remaining = data->dsize - 8; + + switch (format) { + case LTDB_PACKING_FORMAT_NODN: + message->dn = NULL; + break; + + case LTDB_PACKING_FORMAT: + len = strnlen((char *)p, remaining); + if (len == remaining) { + errno = EIO; + goto failed; + } + message->dn = ldb_dn_new(message, ldb, (char *)p); + if (message->dn == NULL) { + errno = ENOMEM; + goto failed; + } + remaining -= len + 1; + p += len + 1; + break; + + default: + errno = EIO; + goto failed; + } + + if (message->num_elements == 0) { + message->elements = NULL; + return 0; + } + + if (message->num_elements > remaining / 6) { + errno = EIO; + goto failed; + } + + message->elements = talloc_array(message, struct ldb_message_element, message->num_elements); + if (!message->elements) { + errno = ENOMEM; + goto failed; + } + + memset(message->elements, 0, + message->num_elements * sizeof(struct ldb_message_element)); + + for (i=0;i<message->num_elements;i++) { + if (remaining < 10) { + errno = EIO; + goto failed; + } + len = strnlen((char *)p, remaining-6); + if (len == remaining-6) { + errno = EIO; + goto failed; + } + message->elements[i].flags = 0; + message->elements[i].name = talloc_strndup(message->elements, (char *)p, len); + if (message->elements[i].name == NULL) { + errno = ENOMEM; + goto failed; + } + remaining -= len + 1; + p += len + 1; + message->elements[i].num_values = pull_uint32(p, 0); + message->elements[i].values = NULL; + if (message->elements[i].num_values != 0) { + message->elements[i].values = talloc_array(message->elements, + struct ldb_val, + message->elements[i].num_values); + if (!message->elements[i].values) { + errno = ENOMEM; + goto failed; + } + } + p += 4; + remaining -= 4; + for (j=0;j<message->elements[i].num_values;j++) { + len = pull_uint32(p, 0); + if (len > remaining-5) { + errno = EIO; + goto failed; + } + + message->elements[i].values[j].length = len; + message->elements[i].values[j].data = talloc_size(message->elements[i].values, len+1); + if (message->elements[i].values[j].data == NULL) { + errno = ENOMEM; + goto failed; + } + memcpy(message->elements[i].values[j].data, p+4, len); + message->elements[i].values[j].data[len] = 0; + + remaining -= len+4+1; + p += len+4+1; + } + } + + if (remaining != 0) { + ldb_debug(ldb, LDB_DEBUG_ERROR, + "Error: %d bytes unread in ltdb_unpack_data\n", remaining); + } + + return 0; + +failed: + talloc_free(message->elements); + return -1; +} diff --git a/ldb/ldb_tdb/ldb_search.c b/ldb/ldb_tdb/ldb_search.c new file mode 100644 index 00000000..da899c36 --- /dev/null +++ b/ldb/ldb_tdb/ldb_search.c @@ -0,0 +1,616 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2004 + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Name: ldb + * + * Component: ldb search functions + * + * Description: functions to search ldb+tdb databases + * + * Author: Andrew Tridgell + */ + +#include "ldb_includes.h" + +#include "ldb_tdb.h" + +/* + add one element to a message +*/ +static int msg_add_element(struct ldb_message *ret, + const struct ldb_message_element *el, + int check_duplicates) +{ + unsigned int i; + struct ldb_message_element *e2, *elnew; + + if (check_duplicates && ldb_msg_find_element(ret, el->name)) { + /* its already there */ + return 0; + } + + e2 = talloc_realloc(ret, ret->elements, struct ldb_message_element, ret->num_elements+1); + if (!e2) { + return -1; + } + ret->elements = e2; + + elnew = &e2[ret->num_elements]; + + elnew->name = talloc_strdup(ret->elements, el->name); + if (!elnew->name) { + return -1; + } + + if (el->num_values) { + elnew->values = talloc_array(ret->elements, struct ldb_val, el->num_values); + if (!elnew->values) { + return -1; + } + } else { + elnew->values = NULL; + } + + for (i=0;i<el->num_values;i++) { + elnew->values[i] = ldb_val_dup(elnew->values, &el->values[i]); + if (elnew->values[i].length != el->values[i].length) { + return -1; + } + } + + elnew->num_values = el->num_values; + + ret->num_elements++; + + return 0; +} + +/* + add the special distinguishedName element +*/ +static int msg_add_distinguished_name(struct ldb_message *msg) +{ + struct ldb_message_element el; + struct ldb_val val; + int ret; + + el.flags = 0; + el.name = "distinguishedName"; + el.num_values = 1; + el.values = &val; + val.data = (uint8_t *)ldb_dn_alloc_linearized(msg, msg->dn); + val.length = strlen((char *)val.data); + + ret = msg_add_element(msg, &el, 1); + return ret; +} + +/* + add all elements from one message into another + */ +static int msg_add_all_elements(struct ldb_module *module, struct ldb_message *ret, + const struct ldb_message *msg) +{ + struct ldb_context *ldb = module->ldb; + unsigned int i; + int check_duplicates = (ret->num_elements != 0); + + if (msg_add_distinguished_name(ret) != 0) { + return -1; + } + + for (i=0;i<msg->num_elements;i++) { + const struct ldb_schema_attribute *a; + a = ldb_schema_attribute_by_name(ldb, msg->elements[i].name); + if (a->flags & LDB_ATTR_FLAG_HIDDEN) { + continue; + } + if (msg_add_element(ret, &msg->elements[i], + check_duplicates) != 0) { + return -1; + } + } + + return 0; +} + + +/* + pull the specified list of attributes from a message + */ +static struct ldb_message *ltdb_pull_attrs(struct ldb_module *module, + TALLOC_CTX *mem_ctx, + const struct ldb_message *msg, + const char * const *attrs) +{ + struct ldb_message *ret; + int i; + + ret = talloc(mem_ctx, struct ldb_message); + if (!ret) { + return NULL; + } + + ret->dn = ldb_dn_copy(ret, msg->dn); + if (!ret->dn) { + talloc_free(ret); + return NULL; + } + + ret->num_elements = 0; + ret->elements = NULL; + + if (!attrs) { + if (msg_add_all_elements(module, ret, msg) != 0) { + talloc_free(ret); + return NULL; + } + return ret; + } + + for (i=0;attrs[i];i++) { + struct ldb_message_element *el; + + if (strcmp(attrs[i], "*") == 0) { + if (msg_add_all_elements(module, ret, msg) != 0) { + talloc_free(ret); + return NULL; + } + continue; + } + + if (ldb_attr_cmp(attrs[i], "distinguishedName") == 0) { + if (msg_add_distinguished_name(ret) != 0) { + return NULL; + } + continue; + } + + el = ldb_msg_find_element(msg, attrs[i]); + if (!el) { + continue; + } + if (msg_add_element(ret, el, 1) != 0) { + talloc_free(ret); + return NULL; + } + } + + return ret; +} + +/* + search the database for a single simple dn. + return LDB_ERR_NO_SUCH_OBJECT on record-not-found + and LDB_SUCCESS on success +*/ +int ltdb_search_base(struct ldb_module *module, struct ldb_dn *dn) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + TDB_DATA tdb_key, tdb_data; + + if (ldb_dn_is_null(dn)) { + return LDB_ERR_NO_SUCH_OBJECT; + } + + /* form the key */ + tdb_key = ltdb_key(module, dn); + if (!tdb_key.dptr) { + return LDB_ERR_OPERATIONS_ERROR; + } + + tdb_data = tdb_fetch(ltdb->tdb, tdb_key); + talloc_free(tdb_key.dptr); + if (!tdb_data.dptr) { + return LDB_ERR_NO_SUCH_OBJECT; + } + + free(tdb_data.dptr); + return LDB_SUCCESS; +} + +/* + search the database for a single simple dn, returning all attributes + in a single message + + return LDB_ERR_NO_SUCH_OBJECT on record-not-found + and LDB_SUCCESS on success +*/ +int ltdb_search_dn1(struct ldb_module *module, struct ldb_dn *dn, struct ldb_message *msg) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + int ret; + TDB_DATA tdb_key, tdb_data; + + memset(msg, 0, sizeof(*msg)); + + /* form the key */ + tdb_key = ltdb_key(module, dn); + if (!tdb_key.dptr) { + return LDB_ERR_OPERATIONS_ERROR; + } + + tdb_data = tdb_fetch(ltdb->tdb, tdb_key); + talloc_free(tdb_key.dptr); + if (!tdb_data.dptr) { + return LDB_ERR_NO_SUCH_OBJECT; + } + + msg->num_elements = 0; + msg->elements = NULL; + + ret = ltdb_unpack_data(module, &tdb_data, msg); + free(tdb_data.dptr); + if (ret == -1) { + return LDB_ERR_OPERATIONS_ERROR; + } + + if (!msg->dn) { + msg->dn = ldb_dn_copy(msg, dn); + } + if (!msg->dn) { + return LDB_ERR_OPERATIONS_ERROR; + } + + return LDB_SUCCESS; +} + +/* + lock the database for read - use by ltdb_search +*/ +static int ltdb_lock_read(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + if (ltdb->in_transaction == 0) { + return tdb_lockall_read(ltdb->tdb); + } + return 0; +} + +/* + unlock the database after a ltdb_lock_read() +*/ +static int ltdb_unlock_read(struct ldb_module *module) +{ + struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data; + if (ltdb->in_transaction == 0) { + return tdb_unlockall_read(ltdb->tdb); + } + return 0; +} + +/* + add a set of attributes from a record to a set of results + return 0 on success, -1 on failure +*/ +int ltdb_add_attr_results(struct ldb_module *module, + TALLOC_CTX *mem_ctx, + struct ldb_message *msg, + const char * const attrs[], + unsigned int *count, + struct ldb_message ***res) +{ + struct ldb_message *msg2; + struct ldb_message **res2; + + /* pull the attributes that the user wants */ + msg2 = ltdb_pull_attrs(module, mem_ctx, msg, attrs); + if (!msg2) { + return -1; + } + + /* add to the results list */ + res2 = talloc_realloc(mem_ctx, *res, struct ldb_message *, (*count)+2); + if (!res2) { + talloc_free(msg2); + return -1; + } + + (*res) = res2; + + (*res)[*count] = talloc_move(*res, &msg2); + (*res)[(*count)+1] = NULL; + (*count)++; + + return 0; +} + + + +/* + filter the specified list of attributes from a message + removing not requested attrs. + */ +int ltdb_filter_attrs(struct ldb_message *msg, const char * const *attrs) +{ + int i, keep_all = 0; + + if (attrs) { + /* check for special attrs */ + for (i = 0; attrs[i]; i++) { + if (strcmp(attrs[i], "*") == 0) { + keep_all = 1; + break; + } + + if (ldb_attr_cmp(attrs[i], "distinguishedName") == 0) { + if (msg_add_distinguished_name(msg) != 0) { + return -1; + } + } + } + } else { + keep_all = 1; + } + + if (keep_all) { + if (msg_add_distinguished_name(msg) != 0) { + return -1; + } + return 0; + } + + for (i = 0; i < msg->num_elements; i++) { + int j, found; + + for (j = 0, found = 0; attrs[j]; j++) { + if (ldb_attr_cmp(msg->elements[i].name, attrs[j]) == 0) { + found = 1; + break; + } + } + + if (!found) { + ldb_msg_remove_attr(msg, msg->elements[i].name); + i--; + } + } + + return 0; +} + +/* + search function for a non-indexed search + */ +static int search_func(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *state) +{ + struct ldb_handle *handle = talloc_get_type(state, struct ldb_handle); + struct ltdb_context *ac = talloc_get_type(handle->private_data, struct ltdb_context); + struct ldb_reply *ares = NULL; + int ret; + + if (key.dsize < 4 || + strncmp((char *)key.dptr, "DN=", 3) != 0) { + return 0; + } + + ares = talloc_zero(ac, struct ldb_reply); + if (!ares) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + return -1; + } + + ares->message = ldb_msg_new(ares); + if (!ares->message) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + talloc_free(ares); + return -1; + } + + /* unpack the record */ + ret = ltdb_unpack_data(ac->module, &data, ares->message); + if (ret == -1) { + talloc_free(ares); + return -1; + } + + if (!ares->message->dn) { + ares->message->dn = ldb_dn_new(ares->message, ac->module->ldb, (char *)key.dptr + 3); + if (ares->message->dn == NULL) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + talloc_free(ares); + return -1; + } + } + + /* see if it matches the given expression */ + if (!ldb_match_msg(ac->module->ldb, ares->message, ac->tree, + ac->base, ac->scope)) { + talloc_free(ares); + return 0; + } + + /* filter the attributes that the user wants */ + ret = ltdb_filter_attrs(ares->message, ac->attrs); + + if (ret == -1) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + handle->state = LDB_ASYNC_DONE; + talloc_free(ares); + return -1; + } + + ares->type = LDB_REPLY_ENTRY; + handle->state = LDB_ASYNC_PENDING; + handle->status = ac->callback(ac->module->ldb, ac->context, ares); + + if (handle->status != LDB_SUCCESS) { + /* don't try to free ares here, the callback is in charge of that */ + return -1; + } + + return 0; +} + + +/* + search the database with a LDAP-like expression. + this is the "full search" non-indexed variant +*/ +static int ltdb_search_full(struct ldb_handle *handle) +{ + struct ltdb_context *ac = talloc_get_type(handle->private_data, struct ltdb_context); + struct ltdb_private *ltdb = talloc_get_type(ac->module->private_data, struct ltdb_private); + int ret; + + if (ltdb->in_transaction != 0) { + ret = tdb_traverse(ltdb->tdb, search_func, handle); + } else { + ret = tdb_traverse_read(ltdb->tdb, search_func, handle); + } + + if (ret == -1) { + handle->status = LDB_ERR_OPERATIONS_ERROR; + } + + handle->state = LDB_ASYNC_DONE; + return LDB_SUCCESS; +} + +/* + search the database with a LDAP-like expression. + choses a search method +*/ +int ltdb_search(struct ldb_module *module, struct ldb_request *req) +{ + struct ltdb_private *ltdb = talloc_get_type(module->private_data, struct ltdb_private); + struct ltdb_context *ltdb_ac; + struct ldb_reply *ares; + int ret; + + if (ltdb_lock_read(module) != 0) { + return LDB_ERR_OPERATIONS_ERROR; + } + + if (ltdb_cache_load(module) != 0) { + ltdb_unlock_read(module); + return LDB_ERR_OPERATIONS_ERROR; + } + + if (req->op.search.tree == NULL) { + ltdb_unlock_read(module); + return LDB_ERR_OPERATIONS_ERROR; + } + + req->handle = init_ltdb_handle(ltdb, module, req); + if (req->handle == NULL) { + ltdb_unlock_read(module); + return LDB_ERR_OPERATIONS_ERROR; + } + + if ((req->op.search.base == NULL) || (ldb_dn_is_null(req->op.search.base) == true)) { + + /* Check what we should do with a NULL dn */ + switch (req->op.search.scope) { + case LDB_SCOPE_BASE: + ldb_asprintf_errstring(module->ldb, + "NULL Base DN invalid for a base search"); + ret = LDB_ERR_INVALID_DN_SYNTAX; + break; + case LDB_SCOPE_ONELEVEL: + ldb_asprintf_errstring(module->ldb, + "NULL Base DN invalid for a one-level search"); + ret = LDB_ERR_INVALID_DN_SYNTAX; + break; + case LDB_SCOPE_SUBTREE: + default: + /* We accept subtree searches from a NULL base DN, ie over the whole DB */ + ret = LDB_SUCCESS; + } + } else if (ldb_dn_is_valid(req->op.search.base) == false) { + + /* We don't want invalid base DNs here */ + ldb_asprintf_errstring(module->ldb, + "Invalid Base DN: %s", + ldb_dn_get_linearized(req->op.search.base)); + ret = LDB_ERR_INVALID_DN_SYNTAX; + + } else if (ltdb->check_base) { + /* This database has been marked as 'checkBaseOnSearch', so do a spot check of the base dn */ + ret = ltdb_search_base(module, req->op.search.base); + + if (ret == LDB_ERR_NO_SUCH_OBJECT) { + ldb_asprintf_errstring(module->ldb, + "No such Base DN: %s", + ldb_dn_get_linearized(req->op.search.base)); + } + + } else { + /* If we are not checking the base DN life is easy */ + ret = LDB_SUCCESS; + } + + ltdb_ac = talloc_get_type(req->handle->private_data, struct ltdb_context); + + ltdb_ac->tree = req->op.search.tree; + ltdb_ac->scope = req->op.search.scope; + ltdb_ac->base = req->op.search.base; + ltdb_ac->attrs = req->op.search.attrs; + + + if (ret == LDB_SUCCESS) { + ret = ltdb_search_indexed(req->handle); + if (ret == LDB_ERR_NO_SUCH_OBJECT) { + /* Not in the index, therefore OK! */ + ret = LDB_SUCCESS; + + } else if (ret == LDB_ERR_OPERATIONS_ERROR) { + /* Not indexed, so we need to do a full scan */ + ret = ltdb_search_full(req->handle); + if (ret != LDB_SUCCESS) { + ldb_set_errstring(module->ldb, "Indexed and full searches both failed!\n"); + } + } + } + + if (ret != LDB_SUCCESS) { + req->handle->state = LDB_ASYNC_DONE; + req->handle->status = ret; + } + + /* Finally send an LDB_REPLY_DONE packet when searching is finished */ + + ares = talloc_zero(req, struct ldb_reply); + if (!ares) { + ltdb_unlock_read(module); + return LDB_ERR_OPERATIONS_ERROR; + } + + req->handle->state = LDB_ASYNC_DONE; + + if (ret == LDB_SUCCESS) { + ares->type = LDB_REPLY_DONE; + + ret = req->callback(module->ldb, req->context, ares); + req->handle->status = ret; + } + + ltdb_unlock_read(module); + + return LDB_SUCCESS; +} + diff --git a/ldb/ldb_tdb/ldb_tdb.c b/ldb/ldb_tdb/ldb_tdb.c new file mode 100644 index 00000000..01d570c8 --- /dev/null +++ b/ldb/ldb_tdb/ldb_tdb.c @@ -0,0 +1,1140 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2004 + Copyright (C) Stefan Metzmacher 2004 + Copyright (C) Simo Sorce 2006 + + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * Name: ldb_tdb + * + * Component: ldb tdb backend + * + * Description: core functions for tdb backend + * + * Author: Andrew Tridgell + * Author: Stefan Metzmacher + * + * Modifications: + * + * - description: make the module use asyncronous calls + * date: Feb 2006 + * Author: Simo Sorce + */ + +#include "ldb_includes.h" + +#include "ldb_tdb.h" + + +/* + map a tdb error code to a ldb error code +*/ +static int ltdb_err_map(enum TDB_ERROR tdb_code) +{ + switch (tdb_code) { + case TDB_SUCCESS: + return LDB_SUCCESS; + case TDB_ERR_CORRUPT: + case TDB_ERR_OOM: + case TDB_ERR_EINVAL: + return LDB_ERR_OPERATIONS_ERROR; + case TDB_ERR_IO: + return LDB_ERR_PROTOCOL_ERROR; + case TDB_ERR_LOCK: + case TDB_ERR_NOLOCK: + return LDB_ERR_BUSY; + case TDB_ERR_LOCK_TIMEOUT: + return LDB_ERR_TIME_LIMIT_EXCEEDED; + case TDB_ERR_EXISTS: + return LDB_ERR_ENTRY_ALREADY_EXISTS; + case TDB_ERR_NOEXIST: + return LDB_ERR_NO_SUCH_OBJECT; + case TDB_ERR_RDONLY: + return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS; + } + return LDB_ERR_OTHER; +} + + +struct ldb_handle *init_ltdb_handle(struct ltdb_private *ltdb, + struct ldb_module *module, + struct ldb_request *req) +{ + struct ltdb_context *ac; + struct ldb_handle *h; + + h = talloc_zero(req, struct ldb_handle); + if (h == NULL) { + ldb_set_errstring(module->ldb, "Out of Memory"); + return NULL; + } + + h->module = module; + + ac = talloc_zero(h, struct ltdb_context); + if (ac == NULL) { + ldb_set_errstring(module->ldb, "Out of Memory"); + talloc_free(h); + return NULL; + } + + h->private_data = (void *)ac; + + h->state = LDB_ASYNC_INIT; + h->status = LDB_SUCCESS; + + ac->module = module; + ac->context = req->context; + ac->callback = req->callback; + + return h; +} + +/* + form a TDB_DATA for a record key + caller frees + + note that the key for a record can depend on whether the + dn refers to a case sensitive index record or not +*/ +struct TDB_DATA ltdb_key(struct ldb_module *module, struct ldb_dn *dn) +{ + struct ldb_context *ldb = module->ldb; + TDB_DATA key; + char *key_str = NULL; + const char *dn_folded = NULL; + + /* + most DNs are case insensitive. The exception is index DNs for + case sensitive attributes + + there are 3 cases dealt with in this code: + + 1) if the dn doesn't start with @ then uppercase the attribute + names and the attributes values of case insensitive attributes + 2) if the dn starts with @ then leave it alone - + the indexing code handles the rest + */ + + dn_folded = ldb_dn_get_casefold(dn); + if (!dn_folded) { + goto failed; + } + + key_str = talloc_strdup(ldb, "DN="); + if (!key_str) { + goto failed; + } + + key_str = talloc_strdup_append_buffer(key_str, dn_folded); + if (!key_str) { + goto failed; + } + + key.dptr = (uint8_t *)key_str; + key.dsize = strlen(key_str) + 1; + + return key; + +failed: + errno = ENOMEM; + key.dptr = NULL; + key.dsize = 0; + return key; +} + +/* + check special dn's have valid attributes + currently only @ATTRIBUTES is checked +*/ +int ltdb_check_special_dn(struct ldb_module *module, + const struct ldb_message *msg) +{ + int i, j; + + if (! ldb_dn_is_special(msg->dn) || + ! ldb_dn_check_special(msg->dn, LTDB_ATTRIBUTES)) { + return 0; + } + + /* we have @ATTRIBUTES, let's check attributes are fine */ + /* should we check that we deny multivalued attributes ? */ + for (i = 0; i < msg->num_elements; i++) { + for (j = 0; j < msg->elements[i].num_values; j++) { + if (ltdb_check_at_attributes_values(&msg->elements[i].values[j]) != 0) { + ldb_set_errstring(module->ldb, "Invalid attribute value in an @ATTRIBUTES entry"); + return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX; + } + } + } + + return 0; +} + + +/* + we've made a modification to a dn - possibly reindex and + update sequence number +*/ +static int ltdb_modified(struct ldb_module *module, struct ldb_dn *dn) +{ + int ret = LDB_SUCCESS; + + if (ldb_dn_is_special(dn) && + (ldb_dn_check_special(dn, LTDB_INDEXLIST) || + ldb_dn_check_special(dn, LTDB_ATTRIBUTES)) ) { + ret = ltdb_reindex(module); + } + + if (ret == LDB_SUCCESS && + !(ldb_dn_is_special(dn) && + ldb_dn_check_special(dn, LTDB_BASEINFO)) ) { + ret = ltdb_increase_sequence_number(module); + } + + return ret; +} + +/* + store a record into the db +*/ +int ltdb_store(struct ldb_module *module, const struct ldb_message *msg, int flgs) +{ + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + TDB_DATA tdb_key, tdb_data; + int ret; + + tdb_key = ltdb_key(module, msg->dn); + if (!tdb_key.dptr) { + return LDB_ERR_OTHER; + } + + ret = ltdb_pack_data(module, msg, &tdb_data); + if (ret == -1) { + talloc_free(tdb_key.dptr); + return LDB_ERR_OTHER; + } + + ret = tdb_store(ltdb->tdb, tdb_key, tdb_data, flgs); + if (ret == -1) { + ret = ltdb_err_map(tdb_error(ltdb->tdb)); + goto done; + } + + ret = ltdb_index_add(module, msg); + if (ret != LDB_SUCCESS) { + tdb_delete(ltdb->tdb, tdb_key); + } + +done: + talloc_free(tdb_key.dptr); + talloc_free(tdb_data.dptr); + + return ret; +} + + +static int ltdb_add_internal(struct ldb_module *module, + const struct ldb_message *msg) +{ + int ret; + + ret = ltdb_check_special_dn(module, msg); + if (ret != LDB_SUCCESS) { + return ret; + } + + if (ltdb_cache_load(module) != 0) { + return LDB_ERR_OPERATIONS_ERROR; + } + + ret = ltdb_store(module, msg, TDB_INSERT); + + if (ret == LDB_ERR_ENTRY_ALREADY_EXISTS) { + ldb_asprintf_errstring(module->ldb, + "Entry %s already exists", + ldb_dn_get_linearized(msg->dn)); + return ret; + } + + if (ret == LDB_SUCCESS) { + ret = ltdb_index_one(module, msg, 1); + if (ret != LDB_SUCCESS) { + return ret; + } + + ret = ltdb_modified(module, msg->dn); + if (ret != LDB_SUCCESS) { + return ret; + } + } + + return ret; +} + +/* + add a record to the database +*/ +static int ltdb_add(struct ldb_module *module, struct ldb_request *req) +{ + struct ltdb_private *ltdb; + struct ltdb_context *ltdb_ac; + int tret, ret = LDB_SUCCESS; + + ltdb = talloc_get_type(module->private_data, struct ltdb_private); + + if (check_critical_controls(req->controls)) { + return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION; + } + + req->handle = init_ltdb_handle(ltdb, module, req); + if (req->handle == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + ltdb_ac = talloc_get_type(req->handle->private_data, struct ltdb_context); + + tret = ltdb_add_internal(module, req->op.add.message); + if (tret != LDB_SUCCESS) { + req->handle->status = tret; + goto done; + } + + if (ltdb_ac->callback) { + ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL); + } +done: + req->handle->state = LDB_ASYNC_DONE; + return ret; +} + +/* + delete a record from the database, not updating indexes (used for deleting + index records) +*/ +int ltdb_delete_noindex(struct ldb_module *module, struct ldb_dn *dn) +{ + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + TDB_DATA tdb_key; + int ret; + + tdb_key = ltdb_key(module, dn); + if (!tdb_key.dptr) { + return LDB_ERR_OTHER; + } + + ret = tdb_delete(ltdb->tdb, tdb_key); + talloc_free(tdb_key.dptr); + + if (ret != 0) { + ret = ltdb_err_map(tdb_error(ltdb->tdb)); + } + + return ret; +} + +static int ltdb_delete_internal(struct ldb_module *module, struct ldb_dn *dn) +{ + struct ldb_message *msg; + int ret; + + msg = talloc(module, struct ldb_message); + if (msg == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + + /* in case any attribute of the message was indexed, we need + to fetch the old record */ + ret = ltdb_search_dn1(module, dn, msg); + if (ret != LDB_SUCCESS) { + /* not finding the old record is an error */ + goto done; + } + + ret = ltdb_delete_noindex(module, dn); + if (ret != LDB_SUCCESS) { + goto done; + } + + /* remove one level attribute */ + ret = ltdb_index_one(module, msg, 0); + if (ret != LDB_SUCCESS) { + goto done; + } + + /* remove any indexed attributes */ + ret = ltdb_index_del(module, msg); + if (ret != LDB_SUCCESS) { + goto done; + } + + ret = ltdb_modified(module, dn); + if (ret != LDB_SUCCESS) { + goto done; + } + +done: + talloc_free(msg); + return ret; +} + +/* + delete a record from the database +*/ +static int ltdb_delete(struct ldb_module *module, struct ldb_request *req) +{ + struct ltdb_private *ltdb; + struct ltdb_context *ltdb_ac; + int tret, ret = LDB_SUCCESS; + + ltdb = talloc_get_type(module->private_data, struct ltdb_private); + + if (check_critical_controls(req->controls)) { + return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION; + } + + req->handle = NULL; + + if (ltdb_cache_load(module) != 0) { + return LDB_ERR_OPERATIONS_ERROR; + } + + req->handle = init_ltdb_handle(ltdb, module, req); + if (req->handle == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + ltdb_ac = talloc_get_type(req->handle->private_data, struct ltdb_context); + + tret = ltdb_delete_internal(module, req->op.del.dn); + if (tret != LDB_SUCCESS) { + req->handle->status = tret; + goto done; + } + + if (ltdb_ac->callback) { + ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL); + } +done: + req->handle->state = LDB_ASYNC_DONE; + return ret; +} + +/* + find an element by attribute name. At the moment this does a linear search, + it should be re-coded to use a binary search once all places that modify + records guarantee sorted order + + return the index of the first matching element if found, otherwise -1 +*/ +static int find_element(const struct ldb_message *msg, const char *name) +{ + unsigned int i; + for (i=0;i<msg->num_elements;i++) { + if (ldb_attr_cmp(msg->elements[i].name, name) == 0) { + return i; + } + } + return -1; +} + + +/* + add an element to an existing record. Assumes a elements array that we + can call re-alloc on, and assumed that we can re-use the data pointers from + the passed in additional values. Use with care! + + returns 0 on success, -1 on failure (and sets errno) +*/ +static int msg_add_element(struct ldb_context *ldb, + struct ldb_message *msg, + struct ldb_message_element *el) +{ + struct ldb_message_element *e2; + unsigned int i; + + e2 = talloc_realloc(msg, msg->elements, struct ldb_message_element, + msg->num_elements+1); + if (!e2) { + errno = ENOMEM; + return -1; + } + + msg->elements = e2; + + e2 = &msg->elements[msg->num_elements]; + + e2->name = el->name; + e2->flags = el->flags; + e2->values = NULL; + if (el->num_values != 0) { + e2->values = talloc_array(msg->elements, + struct ldb_val, el->num_values); + if (!e2->values) { + errno = ENOMEM; + return -1; + } + } + for (i=0;i<el->num_values;i++) { + e2->values[i] = el->values[i]; + } + e2->num_values = el->num_values; + + msg->num_elements++; + + return 0; +} + +/* + delete all elements having a specified attribute name +*/ +static int msg_delete_attribute(struct ldb_module *module, + struct ldb_context *ldb, + struct ldb_message *msg, const char *name) +{ + const char *dn; + unsigned int i, j; + + dn = ldb_dn_get_linearized(msg->dn); + if (dn == NULL) { + return -1; + } + + for (i=0;i<msg->num_elements;i++) { + if (ldb_attr_cmp(msg->elements[i].name, name) == 0) { + for (j=0;j<msg->elements[i].num_values;j++) { + ltdb_index_del_value(module, dn, + &msg->elements[i], j); + } + talloc_free(msg->elements[i].values); + if (msg->num_elements > (i+1)) { + memmove(&msg->elements[i], + &msg->elements[i+1], + sizeof(struct ldb_message_element)* + (msg->num_elements - (i+1))); + } + msg->num_elements--; + i--; + msg->elements = talloc_realloc(msg, msg->elements, + struct ldb_message_element, + msg->num_elements); + } + } + + return 0; +} + +/* + delete all elements matching an attribute name/value + + return 0 on success, -1 on failure +*/ +static int msg_delete_element(struct ldb_module *module, + struct ldb_message *msg, + const char *name, + const struct ldb_val *val) +{ + struct ldb_context *ldb = module->ldb; + unsigned int i; + int found; + struct ldb_message_element *el; + const struct ldb_schema_attribute *a; + + found = find_element(msg, name); + if (found == -1) { + return -1; + } + + el = &msg->elements[found]; + + a = ldb_schema_attribute_by_name(ldb, el->name); + + for (i=0;i<el->num_values;i++) { + if (a->syntax->comparison_fn(ldb, ldb, + &el->values[i], val) == 0) { + if (i<el->num_values-1) { + memmove(&el->values[i], &el->values[i+1], + sizeof(el->values[i])* + (el->num_values-(i+1))); + } + el->num_values--; + if (el->num_values == 0) { + return msg_delete_attribute(module, ldb, + msg, name); + } + return 0; + } + } + + return -1; +} + + +/* + modify a record - internal interface + + yuck - this is O(n^2). Luckily n is usually small so we probably + get away with it, but if we ever have really large attribute lists + then we'll need to look at this again +*/ +int ltdb_modify_internal(struct ldb_module *module, + const struct ldb_message *msg) +{ + struct ldb_context *ldb = module->ldb; + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + TDB_DATA tdb_key, tdb_data; + struct ldb_message *msg2; + unsigned i, j; + int ret, idx; + + tdb_key = ltdb_key(module, msg->dn); + if (!tdb_key.dptr) { + return LDB_ERR_OTHER; + } + + tdb_data = tdb_fetch(ltdb->tdb, tdb_key); + if (!tdb_data.dptr) { + talloc_free(tdb_key.dptr); + return ltdb_err_map(tdb_error(ltdb->tdb)); + } + + msg2 = talloc(tdb_key.dptr, struct ldb_message); + if (msg2 == NULL) { + talloc_free(tdb_key.dptr); + return LDB_ERR_OTHER; + } + + ret = ltdb_unpack_data(module, &tdb_data, msg2); + if (ret == -1) { + ret = LDB_ERR_OTHER; + goto failed; + } + + if (!msg2->dn) { + msg2->dn = msg->dn; + } + + for (i=0;i<msg->num_elements;i++) { + struct ldb_message_element *el = &msg->elements[i]; + struct ldb_message_element *el2; + struct ldb_val *vals; + const char *dn; + + switch (msg->elements[i].flags & LDB_FLAG_MOD_MASK) { + + case LDB_FLAG_MOD_ADD: + /* add this element to the message. fail if it + already exists */ + idx = find_element(msg2, el->name); + + if (idx == -1) { + if (msg_add_element(ldb, msg2, el) != 0) { + ret = LDB_ERR_OTHER; + goto failed; + } + continue; + } + + el2 = &msg2->elements[idx]; + + /* An attribute with this name already exists, + * add all values if they don't already exist + * (check both the other elements to be added, + * and those already in the db). */ + + for (j=0;j<el->num_values;j++) { + if (ldb_msg_find_val(el2, &el->values[j])) { + ldb_asprintf_errstring(module->ldb, "%s: value #%d already exists", el->name, j); + ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS; + goto failed; + } + if (ldb_msg_find_val(el, &el->values[j]) != &el->values[j]) { + ldb_asprintf_errstring(module->ldb, "%s: value #%d provided more than once", el->name, j); + ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS; + goto failed; + } + } + + vals = talloc_realloc(msg2->elements, el2->values, struct ldb_val, + el2->num_values + el->num_values); + + if (vals == NULL) { + ret = LDB_ERR_OTHER; + goto failed; + } + + for (j=0;j<el->num_values;j++) { + vals[el2->num_values + j] = + ldb_val_dup(vals, &el->values[j]); + } + + el2->values = vals; + el2->num_values += el->num_values; + + break; + + case LDB_FLAG_MOD_REPLACE: + /* replace all elements of this attribute name with the elements + listed. The attribute not existing is not an error */ + msg_delete_attribute(module, ldb, msg2, el->name); + + for (j=0;j<el->num_values;j++) { + if (ldb_msg_find_val(el, &el->values[j]) != &el->values[j]) { + ldb_asprintf_errstring(module->ldb, "%s: value #%d provided more than once", el->name, j); + ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS; + goto failed; + } + } + + /* add the replacement element, if not empty */ + if (el->num_values != 0 && + msg_add_element(ldb, msg2, el) != 0) { + ret = LDB_ERR_OTHER; + goto failed; + } + break; + + case LDB_FLAG_MOD_DELETE: + + dn = ldb_dn_get_linearized(msg->dn); + if (dn == NULL) { + ret = LDB_ERR_OTHER; + goto failed; + } + + /* we could be being asked to delete all + values or just some values */ + if (msg->elements[i].num_values == 0) { + if (msg_delete_attribute(module, ldb, msg2, + msg->elements[i].name) != 0) { + ldb_asprintf_errstring(module->ldb, "No such attribute: %s for delete on %s", msg->elements[i].name, dn); + ret = LDB_ERR_NO_SUCH_ATTRIBUTE; + goto failed; + } + break; + } + for (j=0;j<msg->elements[i].num_values;j++) { + if (msg_delete_element(module, + msg2, + msg->elements[i].name, + &msg->elements[i].values[j]) != 0) { + ldb_asprintf_errstring(module->ldb, "No matching attribute value when deleting attribute: %s on %s", msg->elements[i].name, dn); + ret = LDB_ERR_NO_SUCH_ATTRIBUTE; + goto failed; + } + ret = ltdb_index_del_value(module, dn, &msg->elements[i], j); + if (ret != LDB_SUCCESS) { + goto failed; + } + } + break; + default: + ldb_asprintf_errstring(module->ldb, + "Invalid ldb_modify flags on %s: 0x%x", + msg->elements[i].name, + msg->elements[i].flags & LDB_FLAG_MOD_MASK); + ret = LDB_ERR_PROTOCOL_ERROR; + goto failed; + } + } + + /* we've made all the mods + * save the modified record back into the database */ + ret = ltdb_store(module, msg2, TDB_MODIFY); + if (ret != LDB_SUCCESS) { + goto failed; + } + + ret = ltdb_modified(module, msg->dn); + if (ret != LDB_SUCCESS) { + goto failed; + } + + talloc_free(tdb_key.dptr); + free(tdb_data.dptr); + return ret; + +failed: + talloc_free(tdb_key.dptr); + free(tdb_data.dptr); + return ret; +} + +/* + modify a record +*/ +static int ltdb_modify(struct ldb_module *module, struct ldb_request *req) +{ + struct ltdb_private *ltdb; + struct ltdb_context *ltdb_ac; + int tret, ret = LDB_SUCCESS; + + ltdb = talloc_get_type(module->private_data, struct ltdb_private); + + if (check_critical_controls(req->controls)) { + return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION; + } + + req->handle = NULL; + + req->handle = init_ltdb_handle(ltdb, module, req); + if (req->handle == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + ltdb_ac = talloc_get_type(req->handle->private_data, struct ltdb_context); + + tret = ltdb_check_special_dn(module, req->op.mod.message); + if (tret != LDB_SUCCESS) { + req->handle->status = tret; + goto done; + } + + if (ltdb_cache_load(module) != 0) { + ret = LDB_ERR_OPERATIONS_ERROR; + goto done; + } + + tret = ltdb_modify_internal(module, req->op.mod.message); + if (tret != LDB_SUCCESS) { + req->handle->status = tret; + goto done; + } + + if (ltdb_ac->callback) { + ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL); + } +done: + req->handle->state = LDB_ASYNC_DONE; + return ret; +} + +/* + rename a record +*/ +static int ltdb_rename(struct ldb_module *module, struct ldb_request *req) +{ + struct ltdb_private *ltdb; + struct ltdb_context *ltdb_ac; + struct ldb_message *msg; + int tret, ret = LDB_SUCCESS; + + ltdb = talloc_get_type(module->private_data, struct ltdb_private); + + if (check_critical_controls(req->controls)) { + return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION; + } + + req->handle = NULL; + + if (ltdb_cache_load(module) != 0) { + return LDB_ERR_OPERATIONS_ERROR; + } + + req->handle = init_ltdb_handle(ltdb, module, req); + if (req->handle == NULL) { + return LDB_ERR_OPERATIONS_ERROR; + } + ltdb_ac = talloc_get_type(req->handle->private_data, struct ltdb_context); + + msg = talloc(ltdb_ac, struct ldb_message); + if (msg == NULL) { + ret = LDB_ERR_OPERATIONS_ERROR; + goto done; + } + + /* in case any attribute of the message was indexed, we need + to fetch the old record */ + tret = ltdb_search_dn1(module, req->op.rename.olddn, msg); + if (tret != LDB_SUCCESS) { + /* not finding the old record is an error */ + req->handle->status = tret; + goto done; + } + + msg->dn = ldb_dn_copy(msg, req->op.rename.newdn); + if (!msg->dn) { + ret = LDB_ERR_OPERATIONS_ERROR; + goto done; + } + + if (ldb_dn_compare(req->op.rename.olddn, req->op.rename.newdn) == 0) { + /* The rename operation is apparently only changing case - + the DNs are the same. Delete the old DN before adding + the new one to avoid a TDB_ERR_EXISTS error. + + The only drawback to this is that if the delete + succeeds but the add fails, we rely on the + transaction to roll this all back. */ + ret = ltdb_delete_internal(module, req->op.rename.olddn); + if (ret != LDB_SUCCESS) { + goto done; + } + + ret = ltdb_add_internal(module, msg); + if (ret != LDB_SUCCESS) { + goto done; + } + } else { + /* The rename operation is changing DNs. Try to add the new + DN first to avoid clobbering another DN not related to + this rename operation. */ + ret = ltdb_add_internal(module, msg); + if (ret != LDB_SUCCESS) { + goto done; + } + + tret = ltdb_delete_internal(module, req->op.rename.olddn); + if (tret != LDB_SUCCESS) { + ltdb_delete_internal(module, req->op.rename.newdn); + ret = LDB_ERR_OPERATIONS_ERROR; + goto done; + } + } + + if (ltdb_ac->callback) { + ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL); + } +done: + req->handle->state = LDB_ASYNC_DONE; + return ret; +} + +static int ltdb_start_trans(struct ldb_module *module) +{ + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + + if (tdb_transaction_start(ltdb->tdb) != 0) { + return ltdb_err_map(tdb_error(ltdb->tdb)); + } + + ltdb->in_transaction++; + + return LDB_SUCCESS; +} + +static int ltdb_end_trans(struct ldb_module *module) +{ + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + + ltdb->in_transaction--; + + if (tdb_transaction_commit(ltdb->tdb) != 0) { + return ltdb_err_map(tdb_error(ltdb->tdb)); + } + + return LDB_SUCCESS; +} + +static int ltdb_del_trans(struct ldb_module *module) +{ + struct ltdb_private *ltdb = + talloc_get_type(module->private_data, struct ltdb_private); + + ltdb->in_transaction--; + + if (tdb_transaction_cancel(ltdb->tdb) != 0) { + return ltdb_err_map(tdb_error(ltdb->tdb)); + } + + return LDB_SUCCESS; +} + +static int ltdb_wait(struct ldb_handle *handle, enum ldb_wait_type type) +{ + return handle->status; +} + +static int ltdb_request(struct ldb_module *module, struct ldb_request *req) +{ + /* check for oustanding critical controls + * and return an error if found */ + if (check_critical_controls(req->controls)) { + return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION; + } + + /* search, add, modify, delete, rename are handled by their own, + * no other op supported */ + return LDB_ERR_OPERATIONS_ERROR; +} + +/* + return sequenceNumber from @BASEINFO +*/ +static int ltdb_sequence_number(struct ldb_module *module, + struct ldb_request *req) +{ + TALLOC_CTX *tmp_ctx; + struct ldb_message *msg = NULL; + struct ldb_dn *dn; + const char *date; + int tret; + + tmp_ctx = talloc_new(req); + if (tmp_ctx == NULL) { + talloc_free(tmp_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + dn = ldb_dn_new(tmp_ctx, module->ldb, LTDB_BASEINFO); + + msg = talloc(tmp_ctx, struct ldb_message); + if (msg == NULL) { + talloc_free(tmp_ctx); + return LDB_ERR_OPERATIONS_ERROR; + } + + req->op.seq_num.flags = 0; + + tret = ltdb_search_dn1(module, dn, msg); + if (tret != LDB_SUCCESS) { + talloc_free(tmp_ctx); + /* zero is as good as anything when we don't know */ + req->op.seq_num.seq_num = 0; + return LDB_SUCCESS; + } + + switch (req->op.seq_num.type) { + case LDB_SEQ_HIGHEST_SEQ: + req->op.seq_num.seq_num = ldb_msg_find_attr_as_uint64(msg, LTDB_SEQUENCE_NUMBER, 0); + break; + case LDB_SEQ_NEXT: + req->op.seq_num.seq_num = ldb_msg_find_attr_as_uint64(msg, LTDB_SEQUENCE_NUMBER, 0); + req->op.seq_num.seq_num++; + break; + case LDB_SEQ_HIGHEST_TIMESTAMP: + date = ldb_msg_find_attr_as_string(msg, LTDB_MOD_TIMESTAMP, NULL); + if (date) { + req->op.seq_num.seq_num = ldb_string_to_time(date); + } else { + req->op.seq_num.seq_num = 0; + /* zero is as good as anything when we don't know */ + } + break; + } + talloc_free(tmp_ctx); + return LDB_SUCCESS; +} + +static const struct ldb_module_ops ltdb_ops = { + .name = "tdb", + .search = ltdb_search, + .add = ltdb_add, + .modify = ltdb_modify, + .del = ltdb_delete, + .rename = ltdb_rename, + .request = ltdb_request, + .start_transaction = ltdb_start_trans, + .end_transaction = ltdb_end_trans, + .del_transaction = ltdb_del_trans, + .wait = ltdb_wait, + .sequence_number = ltdb_sequence_number +}; + +/* + connect to the database +*/ +static int ltdb_connect(struct ldb_context *ldb, const char *url, + unsigned int flags, const char *options[], + struct ldb_module **module) +{ + const char *path; + int tdb_flags, open_flags; + struct ltdb_private *ltdb; + + /* parse the url */ + if (strchr(url, ':')) { + if (strncmp(url, "tdb://", 6) != 0) { + ldb_debug(ldb, LDB_DEBUG_ERROR, + "Invalid tdb URL '%s'", url); + return -1; + } + path = url+6; + } else { + path = url; + } + + tdb_flags = TDB_DEFAULT | TDB_SEQNUM; + + /* check for the 'nosync' option */ + if (flags & LDB_FLG_NOSYNC) { + tdb_flags |= TDB_NOSYNC; + } + + /* and nommap option */ + if (flags & LDB_FLG_NOMMAP) { + tdb_flags |= TDB_NOMMAP; + } + + if (flags & LDB_FLG_RDONLY) { + open_flags = O_RDONLY; + } else { + open_flags = O_CREAT | O_RDWR; + } + + ltdb = talloc_zero(ldb, struct ltdb_private); + if (!ltdb) { + ldb_oom(ldb); + return -1; + } + + /* note that we use quite a large default hash size */ + ltdb->tdb = ltdb_wrap_open(ltdb, path, 10000, + tdb_flags, open_flags, + ldb->create_perms, ldb); + if (!ltdb->tdb) { + ldb_debug(ldb, LDB_DEBUG_ERROR, + "Unable to open tdb '%s'\n", path); + talloc_free(ltdb); + return -1; + } + + ltdb->sequence_number = 0; + + *module = talloc(ldb, struct ldb_module); + if (!module) { + ldb_oom(ldb); + talloc_free(ltdb); + return -1; + } + talloc_set_name_const(*module, "ldb_tdb backend"); + (*module)->ldb = ldb; + (*module)->prev = (*module)->next = NULL; + (*module)->private_data = ltdb; + (*module)->ops = <db_ops; + + if (ltdb_cache_load(*module) != 0) { + talloc_free(*module); + talloc_free(ltdb); + return -1; + } + + return 0; +} + +const struct ldb_backend_ops ldb_tdb_backend_ops = { + .name = "tdb", + .connect_fn = ltdb_connect +}; diff --git a/ldb/ldb_tdb/ldb_tdb.h b/ldb/ldb_tdb/ldb_tdb.h new file mode 100644 index 00000000..4beced30 --- /dev/null +++ b/ldb/ldb_tdb/ldb_tdb.h @@ -0,0 +1,130 @@ +#if (_SAMBA_BUILD_ == 3) +#include "tdb/include/tdb.h" +#else +#include "replace.h" +#include "system/wait.h" +#include "tdb.h" +#endif + +/* this private structure is used by the ltdb backend in the + ldb_context */ +struct ltdb_private { + TDB_CONTEXT *tdb; + unsigned int connect_flags; + + /* a double is used for portability and ease of string + handling. It has plenty of digits of precision */ + unsigned long long sequence_number; + + /* the low level tdb seqnum - used to avoid loading BASEINFO when + possible */ + int tdb_seqnum; + + struct ltdb_cache { + struct ldb_message *indexlist; + struct ldb_message *attributes; + + struct { + char *name; + int flags; + } last_attribute; + } *cache; + + int in_transaction; + + bool check_base; +}; + +/* + the async local context + holds also internal search state during a full db search +*/ +struct ltdb_context { + struct ldb_module *module; + + /* search stuff */ + const struct ldb_parse_tree *tree; + struct ldb_dn *base; + enum ldb_scope scope; + const char * const *attrs; + + /* async stuff */ + void *context; + int (*callback)(struct ldb_context *, void *, struct ldb_reply *); +}; + +/* special record types */ +#define LTDB_INDEX "@INDEX" +#define LTDB_INDEXLIST "@INDEXLIST" +#define LTDB_IDX "@IDX" +#define LTDB_IDXATTR "@IDXATTR" +#define LTDB_IDXONE "@IDXONE" +#define LTDB_BASEINFO "@BASEINFO" +#define LTDB_OPTIONS "@OPTIONS" +#define LTDB_ATTRIBUTES "@ATTRIBUTES" + +/* special attribute types */ +#define LTDB_SEQUENCE_NUMBER "sequenceNumber" +#define LTDB_CHECK_BASE "checkBaseOnSearch" +#define LTDB_MOD_TIMESTAMP "whenChanged" +#define LTDB_OBJECTCLASS "objectClass" + +/* The following definitions come from lib/ldb/ldb_tdb/ldb_cache.c */ + +int ltdb_cache_reload(struct ldb_module *module); +int ltdb_cache_load(struct ldb_module *module); +int ltdb_increase_sequence_number(struct ldb_module *module); +int ltdb_check_at_attributes_values(const struct ldb_val *value); + +/* The following definitions come from lib/ldb/ldb_tdb/ldb_index.c */ + +struct ldb_parse_tree; + +int ltdb_search_indexed(struct ldb_handle *handle); +int ltdb_index_add(struct ldb_module *module, const struct ldb_message *msg); +int ltdb_index_del(struct ldb_module *module, const struct ldb_message *msg); +int ltdb_index_one(struct ldb_module *module, const struct ldb_message *msg, int add); +int ltdb_reindex(struct ldb_module *module); + +/* The following definitions come from lib/ldb/ldb_tdb/ldb_pack.c */ + +int ltdb_pack_data(struct ldb_module *module, + const struct ldb_message *message, + struct TDB_DATA *data); +void ltdb_unpack_data_free(struct ldb_module *module, + struct ldb_message *message); +int ltdb_unpack_data(struct ldb_module *module, + const struct TDB_DATA *data, + struct ldb_message *message); + +/* The following definitions come from lib/ldb/ldb_tdb/ldb_search.c */ + +int ltdb_has_wildcard(struct ldb_module *module, const char *attr_name, + const struct ldb_val *val); +void ltdb_search_dn1_free(struct ldb_module *module, struct ldb_message *msg); +int ltdb_search_dn1(struct ldb_module *module, struct ldb_dn *dn, struct ldb_message *msg); +int ltdb_add_attr_results(struct ldb_module *module, + TALLOC_CTX *mem_ctx, + struct ldb_message *msg, + const char * const attrs[], + unsigned int *count, + struct ldb_message ***res); +int ltdb_filter_attrs(struct ldb_message *msg, const char * const *attrs); +int ltdb_search(struct ldb_module *module, struct ldb_request *req); + +/* The following definitions come from lib/ldb/ldb_tdb/ldb_tdb.c */ +struct ldb_handle *init_ltdb_handle(struct ltdb_private *ltdb, struct ldb_module *module, + struct ldb_request *req); +struct TDB_DATA ltdb_key(struct ldb_module *module, struct ldb_dn *dn); +int ltdb_store(struct ldb_module *module, const struct ldb_message *msg, int flgs); +int ltdb_delete_noindex(struct ldb_module *module, struct ldb_dn *dn); +int ltdb_modify_internal(struct ldb_module *module, const struct ldb_message *msg); + +int ltdb_index_del_value(struct ldb_module *module, const char *dn, + struct ldb_message_element *el, int v_idx); + +struct tdb_context *ltdb_wrap_open(TALLOC_CTX *mem_ctx, + const char *path, int hash_size, int tdb_flags, + int open_flags, mode_t mode, + struct ldb_context *ldb); + diff --git a/ldb/ldb_tdb/ldb_tdb_wrap.c b/ldb/ldb_tdb/ldb_tdb_wrap.c new file mode 100644 index 00000000..654574cd --- /dev/null +++ b/ldb/ldb_tdb/ldb_tdb_wrap.c @@ -0,0 +1,153 @@ +/* + ldb database library + + Copyright (C) Andrew Tridgell 2005 + + ** NOTE! The following LGPL license applies to the ldb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +#include "ldb_includes.h" + +#include "ldb_tdb.h" + +/* + the purpose of this code is to work around the braindead posix locking + rules, to allow us to have a ldb open more than once while allowing + locking to work +*/ + +struct ltdb_wrap { + struct ltdb_wrap *next, *prev; + struct tdb_context *tdb; + dev_t device; + ino_t inode; +}; + +static struct ltdb_wrap *tdb_list; + +/* destroy the last connection to a tdb */ +static int ltdb_wrap_destructor(struct ltdb_wrap *w) +{ + tdb_close(w->tdb); + if (w->next) { + w->next->prev = w->prev; + } + if (w->prev) { + w->prev->next = w->next; + } + if (w == tdb_list) { + tdb_list = w->next; + } + return 0; +} + +static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4); +static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) +{ + va_list ap; + const char *name = tdb_name(tdb); + struct ldb_context *ldb = talloc_get_type(tdb_get_logging_private(tdb), struct ldb_context); + enum ldb_debug_level ldb_level; + char *message; + va_start(ap, fmt); + message = talloc_vasprintf(ldb, fmt, ap); + va_end(ap); + + switch (level) { + case TDB_DEBUG_FATAL: + ldb_level = LDB_DEBUG_FATAL; + break; + case TDB_DEBUG_ERROR: + ldb_level = LDB_DEBUG_ERROR; + break; + case TDB_DEBUG_WARNING: + ldb_level = LDB_DEBUG_WARNING; + break; + case TDB_DEBUG_TRACE: + ldb_level = LDB_DEBUG_TRACE; + break; + default: + ldb_level = LDB_DEBUG_FATAL; + } + + ldb_debug(ldb, ldb_level, "ltdb: tdb(%s): %s", name, message); + talloc_free(message); +} + +/* + wrapped connection to a tdb database. The caller should _not_ free + this as it is not a talloc structure (as tdb does not use talloc + yet). It will auto-close when the caller frees the mem_ctx that is + passed to this call + */ +struct tdb_context *ltdb_wrap_open(TALLOC_CTX *mem_ctx, + const char *path, int hash_size, + int tdb_flags, + int open_flags, mode_t mode, + struct ldb_context *ldb) +{ + struct ltdb_wrap *w; + struct stat st; + struct tdb_logging_context log_ctx; + + log_ctx.log_fn = ltdb_log_fn; + log_ctx.log_private = ldb; + + if (stat(path, &st) == 0) { + for (w=tdb_list;w;w=w->next) { + if (st.st_dev == w->device && st.st_ino == w->inode) { + if (!talloc_reference(mem_ctx, w)) { + return NULL; + } + return w->tdb; + } + } + } + + w = talloc(mem_ctx, struct ltdb_wrap); + if (w == NULL) { + return NULL; + } + + w->tdb = tdb_open_ex(path, hash_size, tdb_flags, open_flags, mode, &log_ctx, NULL); + if (w->tdb == NULL) { + talloc_free(w); + return NULL; + } + + if (fstat(tdb_fd(w->tdb), &st) != 0) { + tdb_close(w->tdb); + talloc_free(w); + return NULL; + } + + w->device = st.st_dev; + w->inode = st.st_ino; + + talloc_set_destructor(w, ltdb_wrap_destructor); + + w->next = tdb_list; + w->prev = NULL; + if (tdb_list) { + tdb_list->prev = w; + } + tdb_list = w; + + return w->tdb; +} + |