s3:smbd: s/struct fd_event/struct tevent_fd
[Samba/gebeck_regimport.git] / source3 / smbd / smbXsrv_version.c
blob8ba5e1fc98ec103543660ffccd6583d6e8be8904
1 /*
2 Unix SMB/CIFS implementation.
4 Copyright (C) Stefan Metzmacher 2012
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "includes.h"
21 #include "system/filesys.h"
22 #include "smbd/globals.h"
23 #include "dbwrap/dbwrap.h"
24 #include "dbwrap/dbwrap_open.h"
25 #include "lib/util/util_tdb.h"
26 #include "librpc/gen_ndr/ndr_smbXsrv.h"
27 #include "serverid.h"
30 * This implements a version scheme for file server internal
31 * states. smbXsrv_version_global.tdb stores the possible
32 * and current versions of structure formats (struct smbXsrv_*_global)
33 * per cluster node.
35 * If the supported versions doesn't match a version of any
36 * of the other nodes, it refused to start.
38 * This should prevent silent corruption of the internal
39 * databases and structures, if two incompatible implementations
40 * read and write.
42 * In future this can be used to implement rolling code upgrades
43 * in a cluster, but for now it is simple.
46 static struct db_context *smbXsrv_version_global_db_ctx = NULL;
47 static uint32_t smbXsrv_version_global_current_version = UINT32_MAX;
49 NTSTATUS smbXsrv_version_global_init(const struct server_id *server_id)
51 const char *global_path = NULL;
52 struct db_context *db_ctx = NULL;
53 struct db_record *db_rec = NULL;
54 TDB_DATA key;
55 TDB_DATA val;
56 DATA_BLOB blob;
57 struct smbXsrv_version_globalB global_blob;
58 enum ndr_err_code ndr_err;
59 struct smbXsrv_version_global0 *global = NULL;
60 uint32_t i;
61 uint32_t num_valid = 0;
62 struct smbXsrv_version_node0 *valid = NULL;
63 struct smbXsrv_version_node0 *local_node = NULL;
64 bool exists;
65 NTSTATUS status;
66 const char *key_string = "smbXsrv_version_global";
67 TALLOC_CTX *frame;
69 if (smbXsrv_version_global_db_ctx != NULL) {
70 return NT_STATUS_OK;
73 frame = talloc_stackframe();
75 global_path = lock_path("smbXsrv_version_global.tdb");
77 db_ctx = db_open(NULL, global_path,
78 0, /* hash_size */
79 TDB_DEFAULT |
80 TDB_CLEAR_IF_FIRST |
81 TDB_INCOMPATIBLE_HASH,
82 O_RDWR | O_CREAT, 0600,
83 DBWRAP_LOCK_ORDER_1);
84 if (db_ctx == NULL) {
85 status = map_nt_error_from_unix_common(errno);
86 DEBUG(0,("smbXsrv_version_global_init: "
87 "failed to open[%s] - %s\n",
88 global_path, nt_errstr(status)));
89 TALLOC_FREE(frame);
90 return status;
93 key = string_term_tdb_data(key_string);
95 db_rec = dbwrap_fetch_locked(db_ctx, db_ctx, key);
96 if (db_rec == NULL) {
97 status = NT_STATUS_INTERNAL_DB_ERROR;
98 DEBUG(0,("smbXsrv_version_global_init: "
99 "dbwrap_fetch_locked(%s) - %s\n",
100 key_string, nt_errstr(status)));
101 TALLOC_FREE(frame);
102 return status;
105 val = dbwrap_record_get_value(db_rec);
106 if (val.dsize == 0) {
107 global = talloc_zero(frame, struct smbXsrv_version_global0);
108 if (global == NULL) {
109 DEBUG(0,("smbXsrv_version_global_init: "
110 "talloc_zero failed - %s\n", __location__));
111 TALLOC_FREE(frame);
112 return NT_STATUS_NO_MEMORY;
114 ZERO_STRUCT(global_blob);
115 global_blob.version = SMBXSRV_VERSION_CURRENT;
116 global_blob.info.info0 = global;
117 } else {
118 blob = data_blob_const(val.dptr, val.dsize);
120 ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob,
121 (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_version_globalB);
122 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
123 status = ndr_map_error2ntstatus(ndr_err);
124 DEBUG(0,("smbXsrv_version_global_init: "
125 "ndr_pull_smbXsrv_version_globalB - %s\n",
126 nt_errstr(status)));
127 TALLOC_FREE(frame);
128 return status;
131 switch (global_blob.version) {
132 case SMBXSRV_VERSION_0:
133 global = global_blob.info.info0;
134 if (global == NULL) {
135 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
136 break;
138 status = NT_STATUS_OK;
139 break;
140 default:
141 status = NT_STATUS_REVISION_MISMATCH;
142 break;
145 if (!NT_STATUS_IS_OK(status)) {
146 DEBUG(0,("smbXsrv_version_global_init - %s\n",
147 nt_errstr(status)));
148 NDR_PRINT_DEBUG(smbXsrv_version_globalB, &global_blob);
149 TALLOC_FREE(frame);
150 return status;
154 valid = talloc_zero_array(global,
155 struct smbXsrv_version_node0,
156 global->num_nodes + 1);
157 if (valid == NULL) {
158 DEBUG(0,("smbXsrv_version_global_init: "
159 "talloc_zero_array failed - %s\n", __location__));
160 TALLOC_FREE(frame);
161 return NT_STATUS_NO_MEMORY;
164 num_valid = 0;
165 for (i=0; i < global->num_nodes; i++) {
166 struct smbXsrv_version_node0 *n = &global->nodes[i];
168 exists = serverid_exists(&n->server_id);
169 if (!exists) {
170 continue;
173 if (n->min_version > n->max_version) {
174 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
175 DEBUG(0,("smbXsrv_version_global_init - %s\n",
176 nt_errstr(status)));
177 NDR_PRINT_DEBUG(smbXsrv_version_globalB, &global_blob);
178 TALLOC_FREE(frame);
179 return status;
182 if (n->min_version > global_blob.version) {
183 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
184 DEBUG(0,("smbXsrv_version_global_init - %s\n",
185 nt_errstr(status)));
186 NDR_PRINT_DEBUG(smbXsrv_version_globalB, &global_blob);
187 TALLOC_FREE(frame);
188 return status;
191 if (n->max_version < global_blob.version) {
192 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
193 DEBUG(0,("smbXsrv_version_global_init - %s\n",
194 nt_errstr(status)));
195 NDR_PRINT_DEBUG(smbXsrv_version_globalB, &global_blob);
196 TALLOC_FREE(frame);
197 return status;
200 valid[num_valid] = *n;
201 if (server_id->vnn == n->server_id.vnn) {
202 local_node = &valid[num_valid];
204 num_valid++;
207 if (local_node == NULL) {
208 local_node = &valid[num_valid];
209 num_valid++;
212 local_node->server_id = *server_id;
213 local_node->min_version = SMBXSRV_VERSION_0;
214 local_node->max_version = SMBXSRV_VERSION_CURRENT;
215 local_node->current_version = global_blob.version;
217 global->num_nodes = num_valid;
218 global->nodes = valid;
220 global_blob.seqnum += 1;
221 global_blob.info.info0 = global;
223 ndr_err = ndr_push_struct_blob(&blob, db_rec, &global_blob,
224 (ndr_push_flags_fn_t)ndr_push_smbXsrv_version_globalB);
225 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
226 status = ndr_map_error2ntstatus(ndr_err);
227 DEBUG(0,("smbXsrv_version_global_init: "
228 "ndr_push_smbXsrv_version_globalB - %s\n",
229 nt_errstr(status)));
230 TALLOC_FREE(frame);
231 return status;
234 val = make_tdb_data(blob.data, blob.length);
235 status = dbwrap_record_store(db_rec, val, TDB_REPLACE);
236 TALLOC_FREE(db_rec);
237 if (!NT_STATUS_IS_OK(status)) {
238 DEBUG(0,("smbXsrv_version_global_init: "
239 "dbwrap_record_store - %s\n",
240 nt_errstr(status)));
241 TALLOC_FREE(frame);
242 return status;
245 DEBUG(10,("smbXsrv_version_global_init\n"));
246 if (DEBUGLVL(10)) {
247 NDR_PRINT_DEBUG(smbXsrv_version_globalB, &global_blob);
250 smbXsrv_version_global_db_ctx = db_ctx;
251 smbXsrv_version_global_current_version = global_blob.version;
253 TALLOC_FREE(frame);
254 return NT_STATUS_OK;
257 uint32_t smbXsrv_version_global_current(void)
259 return smbXsrv_version_global_current_version;