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);
210 DEBUG(DEBUG_NOTICE, ("connection to daemon closed, exiting\n"));
215 uint32_t ctdb_client_pnn(struct ctdb_client_context *client)
220 void ctdb_client_wait(struct tevent_context *ev, bool *done)
223 tevent_loop_once(ev);
227 struct ctdb_recovery_wait_state {
228 struct tevent_context *ev;
229 struct ctdb_client_context *client;
232 static void ctdb_recovery_wait_retry(struct tevent_req *subreq);
234 struct tevent_req *ctdb_recovery_wait_send(TALLOC_CTX *mem_ctx,
235 struct tevent_context *ev,
236 struct ctdb_client_context *client)
238 struct tevent_req *req, *subreq;
239 struct ctdb_recovery_wait_state *state;
243 req = tevent_req_create(mem_ctx, &state,
244 struct ctdb_recovery_wait_state);
250 state->client = client;
252 ret = ctdb_ctrl_get_recmode(client, ev, client, client->pnn,
253 tevent_timeval_zero(), &recmode);
255 tevent_req_error(req, ret);
256 return tevent_req_post(req, ev);
259 if (recmode == CTDB_RECOVERY_NORMAL) {
260 tevent_req_done(req);
261 return tevent_req_post(req, ev);
264 subreq = tevent_wakeup_send(state, ev,
265 tevent_timeval_current_ofs(1, 0));
266 if (tevent_req_nomem(subreq, req)) {
267 return tevent_req_post(req, ev);
269 tevent_req_set_callback(subreq, ctdb_recovery_wait_retry, req);
274 static void ctdb_recovery_wait_retry(struct tevent_req *subreq)
276 struct tevent_req *req = tevent_req_callback_data(
277 subreq, struct tevent_req);
278 struct ctdb_recovery_wait_state *state = tevent_req_data(
279 req, struct ctdb_recovery_wait_state);
283 status = tevent_wakeup_recv(subreq);
286 tevent_req_error(req, ENOMEM);
290 ret = ctdb_ctrl_get_recmode(state, state->ev, state->client,
291 ctdb_client_pnn(state->client),
292 tevent_timeval_zero(), &recmode);
294 tevent_req_error(req, ret);
298 if (recmode == CTDB_RECOVERY_NORMAL) {
299 tevent_req_done(req);
303 subreq = tevent_wakeup_send(state, state->ev,
304 tevent_timeval_current_ofs(1, 0));
305 if (tevent_req_nomem(subreq, req)) {
308 tevent_req_set_callback(subreq, ctdb_recovery_wait_retry, req);
311 bool ctdb_recovery_wait_recv(struct tevent_req *req, int *perr)
315 if (tevent_req_is_unix_error(req, &err)) {