Commit | Line | Data |
---|---|---|
2a174661 DG |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License, version 2 only, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <common/common.h> | |
21 | ||
22 | #include "index.h" | |
23 | #include "stream.h" | |
24 | #include "viewer-stream.h" | |
25 | ||
2a174661 DG |
26 | /* |
27 | * Get stream from stream id from the given hash table. Return stream if found | |
28 | * else NULL. | |
29 | * | |
30 | * Need to be called with RCU read-side lock held. | |
31 | */ | |
32 | struct relay_stream *stream_find_by_id(struct lttng_ht *ht, | |
33 | uint64_t stream_id) | |
34 | { | |
35 | struct lttng_ht_node_u64 *node; | |
36 | struct lttng_ht_iter iter; | |
37 | struct relay_stream *stream = NULL; | |
38 | ||
39 | assert(ht); | |
40 | ||
41 | lttng_ht_lookup(ht, &stream_id, &iter); | |
42 | node = lttng_ht_iter_get_node_u64(&iter); | |
43 | if (node == NULL) { | |
44 | DBG("Relay stream %" PRIu64 " not found", stream_id); | |
45 | goto end; | |
46 | } | |
47 | stream = caa_container_of(node, struct relay_stream, node); | |
48 | ||
49 | end: | |
50 | return stream; | |
51 | } | |
52 | ||
53 | /* | |
54 | * Close a given stream. If an assosiated viewer stream exists it is updated. | |
55 | * | |
56 | * RCU read side lock MUST be acquired. | |
57 | * | |
58 | * Return 0 if close was successful or 1 if already closed. | |
59 | */ | |
60 | int stream_close(struct relay_session *session, struct relay_stream *stream) | |
61 | { | |
62 | int delret, ret; | |
63 | struct relay_viewer_stream *vstream; | |
64 | struct ctf_trace *ctf_trace; | |
65 | ||
66 | assert(stream); | |
67 | ||
68 | pthread_mutex_lock(&stream->lock); | |
69 | ||
70 | if (stream->terminated_flag) { | |
71 | /* This stream is already closed. Ignore. */ | |
72 | ret = 1; | |
73 | goto end_unlock; | |
74 | } | |
75 | ||
76 | DBG("Closing stream id %" PRIu64, stream->stream_handle); | |
77 | ||
78 | if (stream->fd >= 0) { | |
79 | delret = close(stream->fd); | |
80 | if (delret < 0) { | |
81 | PERROR("close stream"); | |
82 | } | |
83 | } | |
84 | ||
85 | if (stream->index_fd >= 0) { | |
86 | delret = close(stream->index_fd); | |
87 | if (delret < 0) { | |
88 | PERROR("close stream index_fd"); | |
89 | } | |
90 | } | |
91 | ||
92 | vstream = viewer_stream_find_by_id(stream->stream_handle); | |
93 | if (vstream) { | |
94 | /* | |
95 | * Set the last good value into the viewer stream. This is done | |
96 | * right before the stream gets deleted from the hash table. The | |
97 | * lookup failure on the live thread side of a stream indicates | |
98 | * that the viewer stream index received value should be used. | |
99 | */ | |
100 | pthread_mutex_lock(&stream->viewer_stream_rotation_lock); | |
101 | vstream->total_index_received = stream->total_index_received; | |
102 | vstream->tracefile_count_last = stream->tracefile_count_current; | |
103 | vstream->close_write_flag = 1; | |
104 | pthread_mutex_unlock(&stream->viewer_stream_rotation_lock); | |
105 | } | |
106 | ||
107 | /* Cleanup index of that stream. */ | |
108 | relay_index_destroy_by_stream_id(stream->stream_handle); | |
109 | ||
110 | ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, | |
111 | stream->path_name); | |
112 | assert(ctf_trace); | |
113 | ctf_trace_put_ref(ctf_trace); | |
114 | ||
8bf28e67 | 115 | stream->close_flag = 1; |
2a174661 DG |
116 | stream->terminated_flag = 1; |
117 | ret = 0; | |
118 | ||
119 | end_unlock: | |
120 | pthread_mutex_unlock(&stream->lock); | |
121 | return ret; | |
122 | } | |
123 | ||
124 | void stream_delete(struct lttng_ht *ht, struct relay_stream *stream) | |
125 | { | |
126 | int ret; | |
127 | struct lttng_ht_iter iter; | |
128 | ||
129 | assert(ht); | |
130 | assert(stream); | |
131 | ||
132 | iter.iter.node = &stream->node.node; | |
133 | ret = lttng_ht_del(ht, &iter); | |
134 | assert(!ret); | |
135 | ||
136 | cds_list_del(&stream->trace_list); | |
137 | } | |
138 | ||
139 | void stream_destroy(struct relay_stream *stream) | |
140 | { | |
141 | assert(stream); | |
f3e17e93 JG |
142 | free(stream->path_name); |
143 | free(stream->channel_name); | |
144 | free(stream); | |
2a174661 | 145 | } |