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 int ctdb_client_init(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
47 const char *sockpath, struct ctdb_client_context **out)
49 struct ctdb_client_context *client;
52 client = talloc_zero(mem_ctx, struct ctdb_client_context);
54 DEBUG(DEBUG_ERR, (__location__ " memory allocation error\n"));
58 ret = reqid_init(client, INT_MAX-200, &client->idr);
60 DEBUG(DEBUG_ERR, ("reqid_init() failed, ret=%d\n", ret));
65 ret = srvid_init(client, &client->srv);
67 DEBUG(DEBUG_ERR, ("srvid_init() failed, ret=%d\n", ret));
73 client->pnn = CTDB_UNKNOWN_PNN;
75 ret = ctdb_client_connect(client, ev, sockpath);
85 static void client_read_handler(uint8_t *buf, size_t buflen,
87 static void client_dead_handler(void *private_data);
89 static int ctdb_client_connect(struct ctdb_client_context *client,
90 struct tevent_context *ev, const char *sockpath)
92 struct sockaddr_un addr;
96 if (sockpath == NULL) {
97 DEBUG(DEBUG_ERR, ("socket path cannot be NULL\n"));
101 memset(&addr, 0, sizeof(addr));
102 addr.sun_family = AF_UNIX;
103 len = strlcpy(addr.sun_path, sockpath, sizeof(addr.sun_path));
104 if (len != strlen(sockpath)) {
105 DEBUG(DEBUG_ERR, ("socket path too long, len=%zu\n",
110 fd = socket(AF_UNIX, SOCK_STREAM, 0);
113 DEBUG(DEBUG_ERR, ("socket() failed, errno=%d\n", ret));
117 ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
120 DEBUG(DEBUG_ERR, ("connect() failed, errno=%d\n", ret));
126 ret = comm_setup(client, ev, fd, client_read_handler, client,
127 client_dead_handler, client, &client->comm);
129 DEBUG(DEBUG_ERR, ("comm_setup() failed, ret=%d\n", ret));
135 ret = ctdb_ctrl_get_pnn(client, ev, client, CTDB_CURRENT_NODE,
136 tevent_timeval_zero(), &client->pnn);
138 DEBUG(DEBUG_ERR, ("failed to get current node pnn\n"));
141 TALLOC_FREE(client->comm);
148 static void client_read_handler(uint8_t *buf, size_t buflen,
151 struct ctdb_client_context *client = talloc_get_type_abort(
152 private_data, struct ctdb_client_context);
153 struct ctdb_req_header hdr;
156 ret = ctdb_req_header_pull(discard_const(buf), buflen, &hdr);
158 DEBUG(DEBUG_WARNING, ("invalid header, ret=%d\n", ret));
162 if (buflen != hdr.length) {
163 DEBUG(DEBUG_WARNING, ("packet size mismatch %zu != %d\n",
164 buflen, hdr.length));
168 ret = ctdb_req_header_verify(&hdr, 0);
170 DEBUG(DEBUG_WARNING, ("invalid header, ret=%d\n", ret));
174 switch (hdr.operation) {
175 case CTDB_REPLY_CALL:
176 ctdb_client_reply_call(client, buf, buflen, hdr.reqid);
179 case CTDB_REQ_MESSAGE:
180 ctdb_client_req_message(client, buf, buflen, hdr.reqid);
183 case CTDB_REPLY_CONTROL:
184 ctdb_client_reply_control(client, buf, buflen, hdr.reqid);
192 static void client_dead_handler(void *private_data)
194 struct ctdb_client_context *client = talloc_get_type_abort(
195 private_data, struct ctdb_client_context);
197 DEBUG(DEBUG_NOTICE, ("connection to daemon closed, exiting\n"));
202 uint32_t ctdb_client_pnn(struct ctdb_client_context *client)
207 void ctdb_client_wait(struct tevent_context *ev, bool *done)
210 tevent_loop_once(ev);
214 struct ctdb_recovery_wait_state {
215 struct tevent_context *ev;
216 struct ctdb_client_context *client;
219 static void ctdb_recovery_wait_retry(struct tevent_req *subreq);
221 struct tevent_req *ctdb_recovery_wait_send(TALLOC_CTX *mem_ctx,
222 struct tevent_context *ev,
223 struct ctdb_client_context *client)
225 struct tevent_req *req, *subreq;
226 struct ctdb_recovery_wait_state *state;
230 req = tevent_req_create(mem_ctx, &state,
231 struct ctdb_recovery_wait_state);
237 state->client = client;
239 ret = ctdb_ctrl_get_recmode(client, ev, client, client->pnn,
240 tevent_timeval_zero(), &recmode);
242 tevent_req_error(req, ret);
243 return tevent_req_post(req, ev);
246 if (recmode == CTDB_RECOVERY_NORMAL) {
247 tevent_req_done(req);
248 return tevent_req_post(req, ev);
251 subreq = tevent_wakeup_send(state, ev,
252 tevent_timeval_current_ofs(1, 0));
253 if (tevent_req_nomem(subreq, req)) {
254 return tevent_req_post(req, ev);
256 tevent_req_set_callback(subreq, ctdb_recovery_wait_retry, req);
261 static void ctdb_recovery_wait_retry(struct tevent_req *subreq)
263 struct tevent_req *req = tevent_req_callback_data(
264 subreq, struct tevent_req);
265 struct ctdb_recovery_wait_state *state = tevent_req_data(
266 req, struct ctdb_recovery_wait_state);
270 status = tevent_wakeup_recv(subreq);
273 tevent_req_error(req, ENOMEM);
277 ret = ctdb_ctrl_get_recmode(state, state->ev, state->client,
278 ctdb_client_pnn(state->client),
279 tevent_timeval_zero(), &recmode);
281 tevent_req_error(req, ret);
285 if (recmode == CTDB_RECOVERY_NORMAL) {
286 tevent_req_done(req);
290 subreq = tevent_wakeup_send(state, state->ev,
291 tevent_timeval_current_ofs(1, 0));
292 if (tevent_req_nomem(subreq, req)) {
295 tevent_req_set_callback(subreq, ctdb_recovery_wait_retry, req);
298 bool ctdb_recovery_wait_recv(struct tevent_req *req, int *perr)
302 if (tevent_req_is_unix_error(req, &err)) {