SoW-2019-0002: Dynamic Snapshot
[lttng-tools.git] / src / bin / lttng-relayd / cmd-2-2.c
1 /*
2 * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
3 * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
4 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0-only
7 *
8 */
9
10 #define _LGPL_SOURCE
11 #include <assert.h>
12
13 #include "cmd-2-2.h"
14
15 #include <common/common.h>
16 #include <common/sessiond-comm/relayd.h>
17
18 #include <common/compat/endian.h>
19 #include <common/compat/string.h>
20 #include <lttng/constant.h>
21
22 #include "cmd-2-1.h"
23 #include "utils.h"
24
25 /*
26 * cmd_recv_stream_2_2 allocates path_name and channel_name.
27 */
28 int cmd_recv_stream_2_2(const struct lttng_buffer_view *payload,
29 char **ret_path_name, char **ret_channel_name,
30 uint64_t *tracefile_size, uint64_t *tracefile_count)
31 {
32 int ret;
33 struct lttcomm_relayd_add_stream_2_2 stream_info;
34 char *path_name = NULL;
35 char *channel_name = NULL;
36 size_t len;
37
38 if (payload->size < sizeof(stream_info)) {
39 ERR("Unexpected payload size in \"cmd_recv_stream_2_2\": expected >= %zu bytes, got %zu bytes",
40 sizeof(stream_info), payload->size);
41 ret = -1;
42 goto error;
43 }
44 memcpy(&stream_info, payload->data, sizeof(stream_info));
45
46 len = lttng_strnlen(stream_info.pathname, sizeof(stream_info.pathname));
47 /* Ensure that NULL-terminated and fits in local filename length. */
48 if (len == sizeof(stream_info.pathname) || len >= LTTNG_NAME_MAX) {
49 ret = -ENAMETOOLONG;
50 ERR("Path name too long");
51 goto error;
52 }
53 path_name = strdup(stream_info.pathname);
54 if (!path_name) {
55 PERROR("Path name allocation");
56 ret = -ENOMEM;
57 goto error;
58 }
59 len = lttng_strnlen(stream_info.channel_name, sizeof(stream_info.channel_name));
60 if (len == sizeof(stream_info.channel_name) || len >= DEFAULT_STREAM_NAME_LEN) {
61 ret = -ENAMETOOLONG;
62 ERR("Channel name too long");
63 goto error;
64 }
65 channel_name = strdup(stream_info.channel_name);
66 if (!channel_name) {
67 ret = -errno;
68 PERROR("Channel name allocation");
69 goto error;
70 }
71
72 *tracefile_size = be64toh(stream_info.tracefile_size);
73 *tracefile_count = be64toh(stream_info.tracefile_count);
74 *ret_path_name = path_name;
75 *ret_channel_name = channel_name;
76 return 0;
77 error:
78 free(path_name);
79 free(channel_name);
80 return ret;
81 }
This page took 0.044039 seconds and 5 git commands to generate.