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ebdb334b JR |
1 | /* |
2 | * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #define _LGPL_SOURCE | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | #include <assert.h> | |
13 | ||
14 | #include <lttng/map/map.h> | |
15 | ||
16 | #include "common/argpar/argpar.h" | |
17 | #include "common/utils.h" | |
18 | ||
19 | #include "../command.h" | |
20 | #include "../utils.h" | |
21 | ||
22 | #define LTTNG_MAP_DEFAULT_SIZE 4096 | |
23 | ||
24 | enum { | |
25 | OPT_HELP, | |
26 | OPT_SESSION, | |
27 | OPT_USERSPACE, | |
28 | OPT_KERNEL, | |
29 | OPT_MAX_KEY_COUNT, | |
30 | OPT_PER_PID, | |
31 | OPT_PER_UID, | |
32 | OPT_OVERFLOW, | |
33 | OPT_BITNESS, | |
34 | OPT_COALESCE_HITS, | |
35 | }; | |
36 | ||
37 | static const struct argpar_opt_descr add_map_opt_descrs[] = { | |
38 | ||
39 | { OPT_HELP, 'h', "help", false }, | |
40 | { OPT_SESSION, 's', "session", true }, | |
41 | { OPT_USERSPACE, 'u', "userspace", false }, | |
42 | { OPT_KERNEL, 'k', "kernel", false }, | |
43 | { OPT_MAX_KEY_COUNT, '\0', "max-key-count", true}, | |
44 | { OPT_PER_PID, '\0', "per-pid", false}, | |
45 | { OPT_PER_UID, '\0', "per-uid", false}, | |
46 | { OPT_OVERFLOW, '\0', "overflow", false}, | |
47 | { OPT_BITNESS, '\0', "bitness", true}, | |
48 | { OPT_COALESCE_HITS, '\0', "coalesce-hits", false}, | |
49 | ARGPAR_OPT_DESCR_SENTINEL | |
50 | }; | |
51 | ||
52 | static | |
53 | bool assign_string(char **dest, const char *src, const char *opt_name) | |
54 | { | |
55 | bool ret; | |
56 | ||
57 | if (*dest) { | |
58 | ERR("Duplicate %s given.", opt_name); | |
59 | goto error; | |
60 | } | |
61 | ||
62 | *dest = strdup(src); | |
63 | if (!*dest) { | |
64 | ERR("Failed to allocate %s string.", opt_name); | |
65 | goto error; | |
66 | } | |
67 | ||
68 | ret = true; | |
69 | goto end; | |
70 | ||
71 | error: | |
72 | ret = false; | |
73 | ||
74 | end: | |
75 | return ret; | |
76 | } | |
77 | ||
78 | int cmd_add_map(int argc, const char **argv) | |
79 | { | |
80 | int ret, i; | |
81 | enum lttng_error_code error_code_ret; | |
82 | struct argpar_parse_ret argpar_parse_ret = { 0 }; | |
83 | bool opt_userspace = false, opt_kernel = false, opt_buffers_uid = false, | |
84 | opt_buffers_pid = false, opt_overflow = false, opt_coalesce_hits = false; | |
85 | char *opt_session_name = NULL, *session_name = NULL, *opt_max_key_count = NULL, *opt_bitness = NULL; | |
86 | const char *opt_map_name = NULL;; | |
87 | enum lttng_map_bitness bitness_type; | |
88 | enum lttng_map_boundary_policy boundary_policy; | |
89 | enum lttng_map_status status; | |
90 | uint64_t dimensions_sizes[1] = {0}; | |
91 | unsigned long long bitness; | |
92 | struct lttng_map *map; | |
93 | struct lttng_domain dom = {0}; | |
94 | struct lttng_handle *handle = NULL; | |
95 | ||
96 | argpar_parse_ret = argpar_parse(argc - 1, argv + 1, | |
97 | add_map_opt_descrs, true); | |
98 | if (!argpar_parse_ret.items) { | |
99 | ERR("%s", argpar_parse_ret.error); | |
100 | goto error; | |
101 | } | |
102 | ||
103 | for (i = 0; i < argpar_parse_ret.items->n_items; i++) { | |
104 | struct argpar_item *item = argpar_parse_ret.items->items[i]; | |
105 | ||
106 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
107 | struct argpar_item_opt *item_opt = | |
108 | (struct argpar_item_opt *) item; | |
109 | ||
110 | switch (item_opt->descr->id) { | |
111 | case OPT_HELP: | |
112 | SHOW_HELP(); | |
113 | ret = CMD_SUCCESS; | |
114 | goto end; | |
115 | case OPT_SESSION: | |
116 | if (!assign_string(&opt_session_name, item_opt->arg, | |
117 | "-s/--session")) { | |
118 | goto error; | |
119 | } | |
120 | break; | |
121 | case OPT_USERSPACE: | |
122 | opt_userspace = true; | |
123 | break; | |
124 | case OPT_KERNEL: | |
125 | opt_kernel = true; | |
126 | break; | |
127 | case OPT_MAX_KEY_COUNT: | |
128 | if (!assign_string(&opt_max_key_count, item_opt->arg, | |
129 | "--max-key-count")) { | |
130 | goto error; | |
131 | } | |
132 | break; | |
133 | case OPT_PER_PID: | |
134 | opt_buffers_pid = true; | |
135 | break; | |
136 | case OPT_PER_UID: | |
137 | opt_buffers_uid = true; | |
138 | break; | |
139 | case OPT_OVERFLOW: | |
140 | opt_overflow = true; | |
141 | break; | |
142 | case OPT_BITNESS: | |
143 | if (!assign_string(&opt_bitness, item_opt->arg, | |
144 | "--bitness")) { | |
145 | goto error; | |
146 | } | |
147 | break; | |
148 | case OPT_COALESCE_HITS: | |
149 | opt_coalesce_hits = true; | |
150 | break; | |
151 | default: | |
152 | abort(); | |
153 | } | |
154 | } else { | |
155 | struct argpar_item_non_opt *item_non_opt = | |
156 | (struct argpar_item_non_opt *) item; | |
157 | ||
158 | if (opt_map_name) { | |
159 | ERR("Unexpected argument: %s", item_non_opt->arg); | |
160 | goto error; | |
161 | } | |
162 | ||
163 | opt_map_name = item_non_opt->arg; | |
164 | } | |
165 | } | |
166 | ||
167 | if (!opt_map_name) { | |
168 | ERR("Missing map name"); | |
169 | goto error; | |
170 | } | |
171 | ||
172 | if (!opt_session_name) { | |
173 | session_name = get_session_name(); | |
174 | if (session_name == NULL) { | |
175 | goto error; | |
176 | } | |
177 | } else { | |
178 | session_name = opt_session_name; | |
179 | } | |
180 | ||
181 | /* Check that one and only one domain option was provided. */ | |
182 | ret = print_missing_or_multiple_domains( | |
183 | opt_kernel + opt_userspace, false); | |
184 | if (ret) { | |
185 | goto error; | |
186 | } | |
187 | ||
188 | if (opt_kernel) { | |
189 | dom.type = LTTNG_DOMAIN_KERNEL; | |
190 | if (opt_buffers_uid || opt_buffers_pid) { | |
191 | ERR("Buffer type not supported for kernel domain"); | |
192 | goto error; | |
193 | } | |
194 | dom.buf_type = LTTNG_BUFFER_GLOBAL; | |
195 | } else { | |
196 | dom.type = LTTNG_DOMAIN_UST; | |
197 | ||
198 | if (opt_buffers_uid && opt_buffers_pid) { | |
199 | ERR("Only one domain can be specified"); | |
200 | goto error; | |
201 | } | |
202 | if (opt_buffers_pid) { | |
203 | dom.buf_type = LTTNG_BUFFER_PER_PID; | |
204 | } else { | |
205 | /* Defaults to per UID */ | |
206 | dom.buf_type = LTTNG_BUFFER_PER_UID; | |
207 | } | |
208 | } | |
209 | ||
210 | handle = lttng_create_handle(session_name, &dom); | |
211 | if (handle == NULL) { | |
212 | ret = -1; | |
213 | goto error; | |
214 | } | |
215 | ||
216 | if (opt_max_key_count) { | |
217 | unsigned long long max_key_count; | |
218 | if (utils_parse_unsigned_long_long(opt_max_key_count, &max_key_count) != 0) { | |
219 | ERR("Failed to parse `%s` as an integer.", opt_max_key_count); | |
220 | goto error; | |
221 | } | |
222 | ||
223 | dimensions_sizes[0] = max_key_count; | |
224 | } else { | |
225 | dimensions_sizes[0] = LTTNG_MAP_DEFAULT_SIZE; | |
226 | } | |
227 | ||
228 | if (opt_bitness) { | |
229 | if (utils_parse_unsigned_long_long(opt_bitness, &bitness) != 0) { | |
230 | ERR("Failed to parse `%s` as an integer.", opt_bitness); | |
231 | goto error; | |
232 | } | |
233 | switch (bitness) { | |
234 | case 32: | |
235 | bitness_type = LTTNG_MAP_BITNESS_32BITS; | |
236 | break; | |
237 | case 64: | |
238 | bitness_type = LTTNG_MAP_BITNESS_64BITS; | |
239 | break; | |
240 | default: | |
241 | ERR("Bitness %llu not supported", bitness); | |
242 | goto error; | |
243 | } | |
244 | ||
245 | } else { | |
246 | bitness_type = LTTNG_MAP_BITNESS_64BITS; | |
247 | } | |
248 | ||
249 | ||
250 | if (opt_overflow) { | |
251 | boundary_policy = LTTNG_MAP_BOUNDARY_POLICY_OVERFLOW; | |
252 | } else { | |
253 | boundary_policy = LTTNG_MAP_BOUNDARY_POLICY_OVERFLOW; | |
254 | } | |
255 | ||
256 | status = lttng_map_create(opt_map_name, 1, dimensions_sizes, dom.type, | |
257 | dom.buf_type, bitness_type, boundary_policy, | |
258 | opt_coalesce_hits, &map); | |
259 | if (status != LTTNG_MAP_STATUS_OK) { | |
260 | ERR("Creating map \"%s\"", opt_map_name); | |
261 | goto error; | |
262 | } | |
263 | ||
264 | error_code_ret = lttng_add_map(handle, map); | |
265 | if (error_code_ret != LTTNG_OK) { | |
266 | ERR("Adding map \"%s\": %s", opt_map_name, | |
267 | lttng_strerror(error_code_ret)); | |
268 | lttng_map_destroy(map); | |
269 | goto error; | |
270 | } | |
271 | ||
272 | MSG("Map %s created.", opt_map_name); | |
273 | ret = CMD_SUCCESS; | |
274 | ||
275 | lttng_map_destroy(map); | |
276 | ||
277 | goto end; | |
278 | ||
279 | error: | |
280 | ret = CMD_ERROR; | |
281 | end: | |
282 | argpar_parse_ret_fini(&argpar_parse_ret); | |
283 | free(opt_session_name); | |
284 | free(opt_max_key_count); | |
285 | free(opt_bitness); | |
286 | lttng_destroy_handle(handle); | |
287 | return ret; | |
288 | } |