Commit | Line | Data |
---|---|---|
b30fa191 JR |
1 | /* |
2 | * Copyright (C) 2020 Simon Marchi <simon.marchi@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <common/buffer-view.h> | |
9 | #include <common/dynamic-buffer.h> | |
10 | #include <common/snapshot.h> | |
11 | #include <lttng/snapshot-internal.h> | |
12 | #include <lttng/snapshot.h> | |
13 | ||
14 | #include <assert.h> | |
15 | #include <stdlib.h> | |
16 | ||
17 | LTTNG_HIDDEN | |
18 | bool lttng_snapshot_output_validate(const struct lttng_snapshot_output *output) | |
19 | { | |
20 | bool valid = false; | |
21 | size_t len; | |
22 | ||
23 | /* | |
24 | * It is mandatory to have a ctrl_url. If there is only one output | |
25 | * URL (in the net://, net6:// or file:// form), it will be in this | |
26 | * field. | |
27 | */ | |
28 | len = lttng_strnlen(output->ctrl_url, sizeof(output->ctrl_url)); | |
29 | if (len == 0 || len >= sizeof(output->ctrl_url)) { | |
30 | goto end; | |
31 | } | |
32 | ||
33 | len = lttng_strnlen(output->data_url, sizeof(output->data_url)); | |
34 | if (len >= sizeof(output->data_url)) { | |
35 | goto end; | |
36 | } | |
37 | ||
38 | len = lttng_strnlen(output->name, sizeof(output->name)); | |
39 | if (len >= sizeof(output->name)) { | |
40 | goto end; | |
41 | } | |
42 | ||
43 | valid = true; | |
44 | ||
45 | end: | |
46 | return valid; | |
47 | } | |
48 | ||
49 | LTTNG_HIDDEN | |
50 | bool lttng_snapshot_output_is_equal( | |
51 | const struct lttng_snapshot_output *a, | |
52 | const struct lttng_snapshot_output *b) | |
53 | { | |
54 | bool equal = false; | |
55 | ||
56 | assert(a); | |
57 | assert(b); | |
58 | ||
59 | if (a->max_size != b->max_size) { | |
60 | goto end; | |
61 | } | |
62 | ||
63 | if (strcmp(a->name, b->name) != 0) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | if (strcmp(a->ctrl_url, b->ctrl_url) != 0) { | |
68 | goto end; | |
69 | } | |
70 | ||
71 | if (strcmp(a->data_url, b->data_url) != 0) { | |
72 | goto end; | |
73 | } | |
74 | ||
75 | equal = true; | |
76 | ||
77 | end: | |
78 | return equal; | |
79 | } | |
80 | ||
81 | /* | |
82 | * This is essentially the same as `struct lttng_snapshot_output`, but packed. | |
83 | */ | |
84 | struct lttng_snapshot_output_comm { | |
85 | uint32_t id; | |
86 | uint64_t max_size; | |
87 | char name[LTTNG_NAME_MAX]; | |
88 | char ctrl_url[PATH_MAX]; | |
89 | char data_url[PATH_MAX]; | |
90 | } LTTNG_PACKED; | |
91 | ||
92 | LTTNG_HIDDEN | |
93 | int lttng_snapshot_output_serialize( | |
94 | const struct lttng_snapshot_output *output, | |
95 | struct lttng_dynamic_buffer *buf) | |
96 | { | |
97 | struct lttng_snapshot_output_comm comm; | |
98 | int ret; | |
99 | ||
100 | comm.id = output->id; | |
101 | comm.max_size = output->max_size; | |
102 | ||
103 | ret = lttng_strncpy(comm.name, output->name, sizeof(comm.name)); | |
104 | if (ret) { | |
105 | goto end; | |
106 | } | |
107 | ||
108 | ret = lttng_strncpy(comm.ctrl_url, output->ctrl_url, sizeof(comm.ctrl_url)); | |
109 | if (ret) { | |
110 | goto end; | |
111 | } | |
112 | ||
113 | ret = lttng_strncpy(comm.data_url, output->data_url, sizeof(comm.data_url)); | |
114 | if (ret) { | |
115 | goto end; | |
116 | } | |
117 | ||
118 | ret = lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); | |
119 | if (ret) { | |
120 | goto end; | |
121 | } | |
122 | ||
123 | end: | |
124 | return ret; | |
125 | } | |
126 | ||
127 | LTTNG_HIDDEN | |
128 | ssize_t lttng_snapshot_output_create_from_buffer( | |
129 | const struct lttng_buffer_view *view, | |
130 | struct lttng_snapshot_output **output_p) | |
131 | { | |
132 | const struct lttng_snapshot_output_comm *comm; | |
133 | struct lttng_snapshot_output *output = NULL; | |
134 | int ret; | |
135 | ||
136 | if (view->size != sizeof(*comm)) { | |
137 | ret = -1; | |
138 | goto end; | |
139 | } | |
140 | ||
141 | output = lttng_snapshot_output_create(); | |
142 | if (!output) { | |
143 | ret = -1; | |
144 | goto end; | |
145 | } | |
146 | ||
147 | comm = (const struct lttng_snapshot_output_comm *) view->data; | |
148 | ||
149 | output->id = comm->id; | |
150 | output->max_size = comm->max_size; | |
151 | ||
152 | ret = lttng_strncpy(output->name, comm->name, sizeof(output->name)); | |
153 | if (ret) { | |
154 | goto end; | |
155 | } | |
156 | ||
157 | ret = lttng_strncpy(output->ctrl_url, comm->ctrl_url, sizeof(output->ctrl_url)); | |
158 | if (ret) { | |
159 | goto end; | |
160 | } | |
161 | ||
162 | ret = lttng_strncpy(output->data_url, comm->data_url, sizeof(output->data_url)); | |
163 | if (ret) { | |
164 | goto end; | |
165 | } | |
166 | ||
167 | *output_p = output; | |
168 | output = NULL; | |
169 | ret = sizeof(*comm); | |
170 | ||
171 | end: | |
172 | lttng_snapshot_output_destroy(output); | |
173 | return ret; | |
174 | } |