Commit | Line | Data |
---|---|---|
5024c2ac JR |
1 | /* |
2 | * Copyright (C) 2019 Simon Marchi <simon.marchi@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
9 | #include <common/error.h> | |
10 | #include <common/macros.h> | |
11 | #include <lttng/action/action-internal.h> | |
12 | #include <lttng/action/rotate-session-internal.h> | |
13 | #include <lttng/action/rotate-session.h> | |
14 | ||
15 | struct lttng_action_rotate_session { | |
16 | struct lttng_action parent; | |
17 | ||
18 | /* Owned by this. */ | |
19 | char *session_name; | |
20 | }; | |
21 | ||
22 | struct lttng_action_rotate_session_comm { | |
23 | /* Includes the trailing \0. */ | |
24 | uint32_t session_name_len; | |
25 | ||
26 | /* | |
27 | * Variable data: | |
28 | * | |
29 | * - session name (null terminated) | |
30 | */ | |
31 | char data[]; | |
32 | } LTTNG_PACKED; | |
33 | ||
34 | static struct lttng_action_rotate_session *action_rotate_session_from_action( | |
35 | struct lttng_action *action) | |
36 | { | |
37 | assert(action); | |
38 | ||
39 | return container_of(action, struct lttng_action_rotate_session, parent); | |
40 | } | |
41 | ||
42 | static const struct lttng_action_rotate_session *action_rotate_session_from_action_const( | |
43 | const struct lttng_action *action) | |
44 | { | |
45 | assert(action); | |
46 | ||
47 | return container_of(action, struct lttng_action_rotate_session, parent); | |
48 | } | |
49 | ||
50 | static bool lttng_action_rotate_session_validate(struct lttng_action *action) | |
51 | { | |
52 | bool valid; | |
53 | struct lttng_action_rotate_session *action_rotate_session; | |
54 | ||
55 | if (!action) { | |
56 | valid = false; | |
57 | goto end; | |
58 | } | |
59 | ||
60 | action_rotate_session = action_rotate_session_from_action(action); | |
61 | ||
62 | /* A non-empty session name is mandatory. */ | |
63 | if (!action_rotate_session->session_name || | |
64 | strlen(action_rotate_session->session_name) == 0) { | |
65 | valid = false; | |
66 | goto end; | |
67 | } | |
68 | ||
69 | valid = true; | |
70 | end: | |
71 | return valid; | |
72 | } | |
73 | ||
74 | static bool lttng_action_rotate_session_is_equal(const struct lttng_action *_a, const struct lttng_action *_b) | |
75 | { | |
76 | bool is_equal = false; | |
77 | const struct lttng_action_rotate_session *a, *b; | |
78 | ||
79 | a = action_rotate_session_from_action_const(_a); | |
80 | b = action_rotate_session_from_action_const(_b); | |
81 | ||
82 | /* Action is not valid if this is not true. */ | |
83 | assert(a->session_name); | |
84 | assert(b->session_name); | |
85 | if (strcmp(a->session_name, b->session_name)) { | |
86 | goto end; | |
87 | } | |
88 | ||
89 | is_equal = true; | |
90 | end: | |
91 | return is_equal; | |
92 | } | |
93 | static int lttng_action_rotate_session_serialize( | |
94 | struct lttng_action *action, struct lttng_dynamic_buffer *buf) | |
95 | { | |
96 | struct lttng_action_rotate_session *action_rotate_session; | |
97 | struct lttng_action_rotate_session_comm comm; | |
98 | size_t session_name_len; | |
99 | int ret; | |
100 | ||
101 | assert(action); | |
102 | assert(buf); | |
103 | ||
104 | action_rotate_session = action_rotate_session_from_action(action); | |
105 | ||
106 | assert(action_rotate_session->session_name); | |
107 | ||
108 | DBG("Serializing rotate session action: session-name: %s", | |
109 | action_rotate_session->session_name); | |
110 | ||
111 | session_name_len = strlen(action_rotate_session->session_name) + 1; | |
112 | comm.session_name_len = session_name_len; | |
113 | ||
114 | ret = lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); | |
115 | if (ret) { | |
116 | ret = -1; | |
117 | goto end; | |
118 | } | |
119 | ||
120 | ret = lttng_dynamic_buffer_append(buf, | |
121 | action_rotate_session->session_name, session_name_len); | |
122 | if (ret) { | |
123 | ret = -1; | |
124 | goto end; | |
125 | } | |
126 | ||
127 | ret = 0; | |
128 | end: | |
129 | return ret; | |
130 | } | |
131 | ||
132 | static void lttng_action_rotate_session_destroy(struct lttng_action *action) | |
133 | { | |
134 | struct lttng_action_rotate_session *action_rotate_session; | |
135 | ||
136 | if (!action) { | |
137 | goto end; | |
138 | } | |
139 | ||
140 | action_rotate_session = action_rotate_session_from_action(action); | |
141 | ||
142 | free(action_rotate_session->session_name); | |
143 | free(action_rotate_session); | |
144 | ||
145 | end: | |
146 | return; | |
147 | } | |
148 | ||
149 | ssize_t lttng_action_rotate_session_create_from_buffer( | |
150 | const struct lttng_buffer_view *view, | |
151 | struct lttng_action **p_action) | |
152 | { | |
153 | ssize_t consumed_len; | |
154 | struct lttng_action_rotate_session_comm *comm; | |
155 | const char *session_name; | |
156 | struct lttng_action *action; | |
157 | enum lttng_action_status status; | |
158 | ||
159 | action = lttng_action_rotate_session_create(); | |
160 | if (!action) { | |
161 | consumed_len = -1; | |
162 | goto end; | |
163 | } | |
164 | ||
165 | comm = (struct lttng_action_rotate_session_comm *) view->data; | |
166 | session_name = (const char *) &comm->data; | |
167 | ||
168 | if (!lttng_buffer_view_contains_string( | |
169 | view, session_name, comm->session_name_len)) { | |
170 | consumed_len = -1; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | status = lttng_action_rotate_session_set_session_name( | |
175 | action, session_name); | |
176 | if (status != LTTNG_ACTION_STATUS_OK) { | |
177 | consumed_len = -1; | |
178 | goto end; | |
179 | } | |
180 | ||
181 | consumed_len = sizeof(struct lttng_action_rotate_session_comm) + | |
182 | comm->session_name_len; | |
183 | *p_action = action; | |
184 | action = NULL; | |
185 | ||
186 | end: | |
187 | lttng_action_rotate_session_destroy(action); | |
188 | ||
189 | return consumed_len; | |
190 | } | |
191 | ||
192 | struct lttng_action *lttng_action_rotate_session_create(void) | |
193 | { | |
194 | struct lttng_action *action; | |
195 | ||
196 | action = zmalloc(sizeof(struct lttng_action_rotate_session)); | |
197 | if (!action) { | |
198 | goto end; | |
199 | } | |
200 | ||
201 | lttng_action_init(action, LTTNG_ACTION_TYPE_ROTATE_SESSION, | |
202 | lttng_action_rotate_session_validate, | |
203 | lttng_action_rotate_session_serialize, | |
204 | lttng_action_rotate_session_is_equal, | |
205 | lttng_action_rotate_session_destroy); | |
206 | ||
207 | end: | |
208 | return action; | |
209 | } | |
210 | ||
211 | enum lttng_action_status lttng_action_rotate_session_set_session_name( | |
212 | struct lttng_action *action, const char *session_name) | |
213 | { | |
214 | struct lttng_action_rotate_session *action_rotate_session; | |
215 | enum lttng_action_status status; | |
216 | ||
217 | if (!action || !session_name || strlen(session_name) == 0) { | |
218 | status = LTTNG_ACTION_STATUS_INVALID; | |
219 | goto end; | |
220 | } | |
221 | ||
222 | action_rotate_session = action_rotate_session_from_action(action); | |
223 | ||
224 | free(action_rotate_session->session_name); | |
225 | ||
226 | action_rotate_session->session_name = strdup(session_name); | |
227 | if (!action_rotate_session->session_name) { | |
228 | status = LTTNG_ACTION_STATUS_ERROR; | |
229 | goto end; | |
230 | } | |
231 | ||
232 | status = LTTNG_ACTION_STATUS_OK; | |
233 | end: | |
234 | return status; | |
235 | } | |
236 | ||
237 | enum lttng_action_status lttng_action_rotate_session_get_session_name( | |
238 | const struct lttng_action *action, const char **session_name) | |
239 | { | |
240 | const struct lttng_action_rotate_session *action_rotate_session; | |
241 | enum lttng_action_status status; | |
242 | ||
243 | if (!action || !session_name) { | |
244 | status = LTTNG_ACTION_STATUS_INVALID; | |
245 | goto end; | |
246 | } | |
247 | ||
248 | action_rotate_session = action_rotate_session_from_action_const(action); | |
249 | ||
250 | *session_name = action_rotate_session->session_name; | |
251 | ||
252 | status = LTTNG_ACTION_STATUS_OK; | |
253 | end: | |
254 | return status; | |
255 | } |