2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; only version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <lttng-share.h>
27 #include <lttng-sessiond-comm.h>
28 #include <lttng/lttng-consumer.h>
30 #include "hashtable.h"
31 #include "ust-consumer.h"
34 * Send all stream fds of UST channel to the consumer.
36 static int send_channel_streams(int sock
,
37 struct ust_app_channel
*uchan
)
40 struct ltt_ust_stream
*stream
;
41 struct lttcomm_consumer_msg lum
;
42 struct cds_lfht_iter iter
;
43 struct cds_lfht_node
*node
;
45 DBG("Sending streams of channel %s to UST consumer", uchan
->name
);
48 lum
.cmd_type
= LTTNG_CONSUMER_ADD_CHANNEL
;
51 * We need to keep shm_fd open to make sure this key stays unique within
54 lum
.u
.channel
.channel_key
= uchan
->obj
->shm_fd
;
55 lum
.u
.channel
.max_sb_size
= uchan
->attr
.subbuf_size
;
56 lum
.u
.channel
.mmap_len
= uchan
->obj
->memory_map_size
;
57 DBG("Sending channel %d to consumer", lum
.u
.channel
.channel_key
);
58 ret
= lttcomm_send_unix_sock(sock
, &lum
, sizeof(lum
));
60 perror("send consumer channel");
63 fds
[0] = uchan
->obj
->shm_fd
;
64 fds
[1] = uchan
->obj
->wait_fd
;
65 ret
= lttcomm_send_fds_unix_sock(sock
, fds
, 2);
67 perror("send consumer channel ancillary data");
73 hashtable_get_first(uchan
->streams
, &iter
);
74 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
75 stream
= caa_container_of(node
, struct ltt_ust_stream
, node
);
79 if (!stream
->obj
->shm_fd
) {
83 lum
.cmd_type
= LTTNG_CONSUMER_ADD_STREAM
;
84 lum
.u
.stream
.channel_key
= uchan
->obj
->shm_fd
;
85 lum
.u
.stream
.stream_key
= stream
->obj
->shm_fd
;
86 lum
.u
.stream
.state
= LTTNG_CONSUMER_ACTIVE_STREAM
;
87 lum
.u
.stream
.output
= uchan
->attr
.output
;
88 lum
.u
.stream
.mmap_len
= stream
->obj
->memory_map_size
;
89 strncpy(lum
.u
.stream
.path_name
, stream
->pathname
, PATH_MAX
- 1);
90 lum
.u
.stream
.path_name
[PATH_MAX
- 1] = '\0';
91 DBG("Sending stream %d to consumer", lum
.u
.stream
.stream_key
);
92 ret
= lttcomm_send_unix_sock(sock
, &lum
, sizeof(lum
));
94 perror("send consumer stream");
98 fds
[0] = stream
->obj
->shm_fd
;
99 fds
[1] = stream
->obj
->wait_fd
;
100 ret
= lttcomm_send_fds_unix_sock(sock
, fds
, 2);
102 perror("send consumer stream ancillary data");
107 hashtable_get_next(uchan
->streams
, &iter
);
111 DBG("consumer channel streams sent");
120 * Send all stream fds of the UST session to the consumer.
122 int ust_consumer_send_session(int consumer_fd
, struct ust_app_session
*usess
)
125 int sock
= consumer_fd
;
126 struct cds_lfht_iter iter
;
127 struct cds_lfht_node
*node
;
128 struct lttcomm_consumer_msg lum
;
129 struct ust_app_channel
*uchan
;
131 DBG("Sending metadata stream fd");
133 if (usess
->metadata
->obj
->shm_fd
!= 0) {
136 /* Send metadata channel fd */
137 lum
.cmd_type
= LTTNG_CONSUMER_ADD_CHANNEL
;
138 lum
.u
.channel
.channel_key
= usess
->metadata
->obj
->shm_fd
;
139 lum
.u
.channel
.max_sb_size
= usess
->metadata
->attr
.subbuf_size
;
140 lum
.u
.channel
.mmap_len
= 0; /* for kernel */
141 DBG("Sending metadata channel %d to consumer", lum
.u
.stream
.stream_key
);
142 ret
= lttcomm_send_unix_sock(sock
, &lum
, sizeof(lum
));
144 perror("send consumer channel");
147 fds
[0] = usess
->metadata
->obj
->shm_fd
;
148 fds
[1] = usess
->metadata
->obj
->wait_fd
;
149 ret
= lttcomm_send_fds_unix_sock(sock
, fds
, 2);
151 perror("send consumer metadata channel");
155 /* Send metadata stream fd */
156 lum
.cmd_type
= LTTNG_CONSUMER_ADD_STREAM
;
157 lum
.u
.stream
.channel_key
= usess
->metadata
->obj
->shm_fd
;
158 lum
.u
.stream
.stream_key
= usess
->metadata
->stream_obj
->shm_fd
;
159 lum
.u
.stream
.state
= LTTNG_CONSUMER_ACTIVE_STREAM
;
160 lum
.u
.stream
.output
= DEFAULT_UST_CHANNEL_OUTPUT
;
161 lum
.u
.stream
.mmap_len
= usess
->metadata
->stream_obj
->memory_map_size
;
162 strncpy(lum
.u
.stream
.path_name
, usess
->metadata
->pathname
, PATH_MAX
- 1);
163 lum
.u
.stream
.path_name
[PATH_MAX
- 1] = '\0';
164 DBG("Sending metadata stream %d to consumer", lum
.u
.stream
.stream_key
);
165 ret
= lttcomm_send_unix_sock(sock
, &lum
, sizeof(lum
));
167 perror("send consumer metadata stream");
170 fds
[0] = usess
->metadata
->stream_obj
->shm_fd
;
171 fds
[1] = usess
->metadata
->stream_obj
->wait_fd
;
172 ret
= lttcomm_send_fds_unix_sock(sock
, fds
, 2);
174 perror("send consumer stream");
179 /* Send each channel fd streams of session */
181 hashtable_get_first(usess
->channels
, &iter
);
182 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
183 uchan
= caa_container_of(node
, struct ust_app_channel
, node
);
185 ret
= send_channel_streams(sock
, uchan
);
189 hashtable_get_next(usess
->channels
, &iter
);
193 DBG("consumer fds (metadata and channel streams) sent");