4 Copyright (C) Amitay Isaacs 2015
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/>.
21 #include "system/network.h"
22 #include "system/filesys.h"
28 #include "common/reqid.h"
29 #include "common/srvid.h"
30 #include "common/comm.h"
31 #include "common/logging.h"
33 #include "lib/util/tevent_unix.h"
34 #include "lib/util/debug.h"
36 #include "protocol/protocol.h"
37 #include "protocol/protocol_api.h"
39 #include "client/client_private.h"
40 #include "client/client.h"
42 static int ctdb_client_connect(struct ctdb_client_context *client,
43 struct tevent_context *ev,
44 const char *sockpath);
46 static int ctdb_client_context_destructor(struct ctdb_client_context *client);
48 int ctdb_client_init(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
49 const char *sockpath, struct ctdb_client_context **out)
51 struct ctdb_client_context *client;
54 client = talloc_zero(mem_ctx, struct ctdb_client_context);
56 DEBUG(DEBUG_ERR, (__location__ " memory allocation error\n"));
60 ret = reqid_init(client, INT_MAX-200, &client->idr);
62 DEBUG(DEBUG_ERR, ("reqid_init() failed, ret=%d\n", ret));
67 ret = srvid_init(client, &client->srv);
69 DEBUG(DEBUG_ERR, ("srvid_init() failed, ret=%d\n", ret));
75 client->pnn = CTDB_UNKNOWN_PNN;
77 ret = ctdb_client_connect(client, ev, sockpath);
83 talloc_set_destructor(client, ctdb_client_context_destructor);
89 static int ctdb_client_context_destructor(struct ctdb_client_context *client)
91 if (client->fd != -1) {
98 static void client_read_handler(uint8_t *buf, size_t buflen,
100 static void client_dead_handler(void *private_data);
102 static int ctdb_client_connect(struct ctdb_client_context *client,
103 struct tevent_context *ev, const char *sockpath)
105 struct sockaddr_un addr;
109 if (sockpath == NULL) {
110 DEBUG(DEBUG_ERR, ("socket path cannot be NULL\n"));
114 memset(&addr, 0, sizeof(addr));
115 addr.sun_family = AF_UNIX;
116 len = strlcpy(addr.sun_path, sockpath, sizeof(addr.sun_path));
117 if (len != strlen(sockpath)) {
118 DEBUG(DEBUG_ERR, ("socket path too long, len=%zu\n",
123 fd = socket(AF_UNIX, SOCK_STREAM, 0);
126 DEBUG(DEBUG_ERR, ("socket() failed, errno=%d\n", ret));
130 ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
133 DEBUG(DEBUG_ERR, ("connect() failed, errno=%d\n", ret));
139 ret = comm_setup(client, ev, fd, client_read_handler, client,
140 client_dead_handler, client, &client->comm);
142 DEBUG(DEBUG_ERR, ("comm_setup() failed, ret=%d\n", ret));
148 ret = ctdb_ctrl_get_pnn(client, ev, client, CTDB_CURRENT_NODE,
149 tevent_timeval_zero(), &client->pnn);
151 DEBUG(DEBUG_ERR, ("failed to get current node pnn\n"));
154 TALLOC_FREE(client->comm);
161 static void client_read_handler(uint8_t *buf, size_t buflen,
164 struct ctdb_client_context *client = talloc_get_type_abort(
165 private_data, struct ctdb_client_context);
166 struct ctdb_req_header hdr;
169 ret = ctdb_req_header_pull(discard_const(buf), buflen, &hdr);
171 DEBUG(DEBUG_WARNING, ("invalid header, ret=%d\n", ret));
175 if (buflen != hdr.length) {
176 DEBUG(DEBUG_WARNING, ("packet size mismatch %zu != %d\n",
177 buflen, hdr.length));
181 ret = ctdb_req_header_verify(&hdr, 0);
183 DEBUG(DEBUG_WARNING, ("invalid header, ret=%d\n", ret));
187 switch (hdr.operation) {
188 case CTDB_REPLY_CALL:
189 ctdb_client_reply_call(client, buf, buflen, hdr.reqid);
192 case CTDB_REQ_MESSAGE:
193 ctdb_client_req_message(client, buf, buflen, hdr.reqid);
196 case CTDB_REPLY_CONTROL:
197 ctdb_client_reply_control(client, buf, buflen, hdr.reqid);
205 static void client_dead_handler(void *private_data)
207 struct ctdb_client_context *client = talloc_get_type_abort(
208 private_data, struct ctdb_client_context);
209 ctdb_client_callback_func_t callback = client->callback;
210 void *callback_data = client->private_data;
213 if (callback != NULL) {
214 callback(callback_data);
218 DEBUG(DEBUG_NOTICE, ("connection to daemon closed, exiting\n"));
222 void ctdb_client_set_disconnect_callback(struct ctdb_client_context *client,
223 ctdb_client_callback_func_t callback,
226 client->callback = callback;
227 client->private_data = private_data;
230 uint32_t ctdb_client_pnn(struct ctdb_client_context *client)
235 void ctdb_client_wait(struct tevent_context *ev, bool *done)
238 tevent_loop_once(ev);
242 static void ctdb_client_wait_timeout_handler(struct tevent_context *ev,
243 struct tevent_timer *te,
247 bool *timed_out = (bool *)private_data;
252 int ctdb_client_wait_timeout(struct tevent_context *ev, bool *done,
253 struct timeval timeout)
256 struct tevent_timer *timer;
257 bool timed_out = false;
259 mem_ctx = talloc_new(ev);
260 if (mem_ctx == NULL) {
264 timer = tevent_add_timer(ev, mem_ctx, timeout,
265 ctdb_client_wait_timeout_handler,
268 talloc_free(mem_ctx);
272 while (! (*done) && ! timed_out) {
273 tevent_loop_once(ev);
276 talloc_free(mem_ctx);
285 struct ctdb_recovery_wait_state {
286 struct tevent_context *ev;
287 struct ctdb_client_context *client;
290 static void ctdb_recovery_wait_recmode(struct tevent_req *subreq);
291 static void ctdb_recovery_wait_retry(struct tevent_req *subreq);
293 struct tevent_req *ctdb_recovery_wait_send(TALLOC_CTX *mem_ctx,
294 struct tevent_context *ev,
295 struct ctdb_client_context *client)
297 struct tevent_req *req, *subreq;
298 struct ctdb_recovery_wait_state *state;
299 struct ctdb_req_control request;
301 req = tevent_req_create(mem_ctx, &state,
302 struct ctdb_recovery_wait_state);
308 state->client = client;
310 ctdb_req_control_get_recmode(&request);
311 subreq = ctdb_client_control_send(state, ev, client, client->pnn,
312 tevent_timeval_zero(), &request);
313 if (tevent_req_nomem(subreq, req)) {
314 return tevent_req_post(req, ev);
316 tevent_req_set_callback(subreq, ctdb_recovery_wait_recmode, req);
321 static void ctdb_recovery_wait_recmode(struct tevent_req *subreq)
323 struct tevent_req *req = tevent_req_callback_data(
324 subreq, struct tevent_req);
325 struct ctdb_recovery_wait_state *state = tevent_req_data(
326 req, struct ctdb_recovery_wait_state);
327 struct ctdb_reply_control *reply;
332 status = ctdb_client_control_recv(subreq, &ret, state, &reply);
335 tevent_req_error(req, ret);
339 ret = ctdb_reply_control_get_recmode(reply, &recmode);
341 tevent_req_error(req, ret);
345 if (recmode == CTDB_RECOVERY_NORMAL) {
346 tevent_req_done(req);
350 subreq = tevent_wakeup_send(state, state->ev,
351 tevent_timeval_current_ofs(1, 0));
352 if (tevent_req_nomem(subreq, req)) {
355 tevent_req_set_callback(subreq, ctdb_recovery_wait_retry, req);
358 static void ctdb_recovery_wait_retry(struct tevent_req *subreq)
360 struct tevent_req *req = tevent_req_callback_data(
361 subreq, struct tevent_req);
362 struct ctdb_recovery_wait_state *state = tevent_req_data(
363 req, struct ctdb_recovery_wait_state);
364 struct ctdb_req_control request;
367 status = tevent_wakeup_recv(subreq);
370 tevent_req_error(req, ENOMEM);
374 ctdb_req_control_get_recmode(&request);
375 subreq = ctdb_client_control_send(state, state->ev, state->client,
377 tevent_timeval_zero(), &request);
378 if (tevent_req_nomem(subreq, req)) {
381 tevent_req_set_callback(subreq, ctdb_recovery_wait_recmode, req);
384 bool ctdb_recovery_wait_recv(struct tevent_req *req, int *perr)
388 if (tevent_req_is_unix_error(req, &err)) {
398 bool ctdb_recovery_wait(struct tevent_context *ev,
399 struct ctdb_client_context *client)
402 struct tevent_req *req;
405 mem_ctx = talloc_new(client);
406 if (mem_ctx == NULL) {
410 req = ctdb_recovery_wait_send(mem_ctx, ev, client);
415 tevent_req_poll(req, ev);
417 status = ctdb_recovery_wait_recv(req, NULL);
419 talloc_free(mem_ctx);