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0dd16449 VCG |
1 | /* |
2 | * q_taprio.c Time Aware Priority Scheduler | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Vinicius Costa Gomes <vinicius.gomes@intel.com> | |
10 | * Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <inttypes.h> | |
19 | #include <sys/socket.h> | |
20 | #include <netinet/in.h> | |
21 | #include <arpa/inet.h> | |
22 | #include <string.h> | |
23 | ||
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include "list.h" | |
27 | ||
28 | struct sched_entry { | |
29 | struct list_head list; | |
30 | uint32_t index; | |
31 | uint32_t interval; | |
32 | uint32_t gatemask; | |
33 | uint8_t cmd; | |
34 | }; | |
35 | ||
36 | #define CLOCKID_INVALID (-1) | |
37 | static const struct static_clockid { | |
38 | const char *name; | |
39 | clockid_t clockid; | |
40 | } clockids_sysv[] = { | |
41 | { "REALTIME", CLOCK_REALTIME }, | |
42 | { "TAI", CLOCK_TAI }, | |
43 | { "BOOTTIME", CLOCK_BOOTTIME }, | |
44 | { "MONOTONIC", CLOCK_MONOTONIC }, | |
45 | { NULL } | |
46 | }; | |
47 | ||
48 | static void explain(void) | |
49 | { | |
50 | fprintf(stderr, "Usage: ... taprio clockid CLOCKID\n"); | |
51 | fprintf(stderr, " [num_tc NUMBER] [map P0 P1 ...] "); | |
52 | fprintf(stderr, " [queues COUNT@OFFSET COUNT@OFFSET COUNT@OFFSET ...] "); | |
53 | fprintf(stderr, " [ [sched-entry index cmd gate-mask interval] ... ] "); | |
54 | fprintf(stderr, " [base-time time] "); | |
55 | fprintf(stderr, "\nCLOCKID must be a valid SYS-V id (i.e. CLOCK_TAI)"); | |
56 | fprintf(stderr, "\n"); | |
57 | } | |
58 | ||
59 | static void explain_clockid(const char *val) | |
60 | { | |
61 | fprintf(stderr, "taprio: illegal value for \"clockid\": \"%s\".\n", val); | |
62 | fprintf(stderr, "It must be a valid SYS-V id (i.e. CLOCK_TAI)\n"); | |
63 | } | |
64 | ||
65 | static int get_clockid(__s32 *val, const char *arg) | |
66 | { | |
67 | const struct static_clockid *c; | |
68 | ||
69 | /* Drop the CLOCK_ prefix if that is being used. */ | |
70 | if (strcasestr(arg, "CLOCK_") != NULL) | |
71 | arg += sizeof("CLOCK_") - 1; | |
72 | ||
73 | for (c = clockids_sysv; c->name; c++) { | |
74 | if (strcasecmp(c->name, arg) == 0) { | |
75 | *val = c->clockid; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | } | |
80 | ||
81 | return -1; | |
82 | } | |
83 | ||
84 | static const char* get_clock_name(clockid_t clockid) | |
85 | { | |
86 | const struct static_clockid *c; | |
87 | ||
88 | for (c = clockids_sysv; c->name; c++) { | |
89 | if (clockid == c->clockid) | |
90 | return c->name; | |
91 | } | |
92 | ||
93 | return "invalid"; | |
94 | } | |
95 | ||
96 | static const char *entry_cmd_to_str(__u8 cmd) | |
97 | { | |
98 | switch (cmd) { | |
99 | case TC_TAPRIO_CMD_SET_GATES: | |
100 | return "S"; | |
101 | default: | |
102 | return "Invalid"; | |
103 | } | |
104 | } | |
105 | ||
106 | static int str_to_entry_cmd(const char *str) | |
107 | { | |
108 | if (strcmp(str, "S") == 0) | |
109 | return TC_TAPRIO_CMD_SET_GATES; | |
110 | ||
111 | return -1; | |
112 | } | |
113 | ||
114 | static int add_sched_list(struct list_head *sched_entries, struct nlmsghdr *n) | |
115 | { | |
116 | struct sched_entry *e; | |
117 | ||
118 | list_for_each_entry(e, sched_entries, list) { | |
119 | struct rtattr *a; | |
120 | ||
121 | a = addattr_nest(n, 1024, TCA_TAPRIO_SCHED_ENTRY); | |
122 | ||
123 | addattr_l(n, 1024, TCA_TAPRIO_SCHED_ENTRY_CMD, &e->cmd, sizeof(e->cmd)); | |
124 | addattr_l(n, 1024, TCA_TAPRIO_SCHED_ENTRY_GATE_MASK, &e->gatemask, sizeof(e->gatemask)); | |
125 | addattr_l(n, 1024, TCA_TAPRIO_SCHED_ENTRY_INTERVAL, &e->interval, sizeof(e->interval)); | |
126 | ||
127 | addattr_nest_end(n, a); | |
128 | } | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static void explain_sched_entry(void) | |
134 | { | |
135 | fprintf(stderr, "Usage: ... taprio ... sched-entry <cmd> <gate mask> <interval>\n"); | |
136 | } | |
137 | ||
138 | static struct sched_entry *create_entry(uint32_t gatemask, uint32_t interval, uint8_t cmd) | |
139 | { | |
140 | struct sched_entry *e; | |
141 | ||
142 | e = calloc(1, sizeof(*e)); | |
143 | if (!e) | |
144 | return NULL; | |
145 | ||
146 | e->gatemask = gatemask; | |
147 | e->interval = interval; | |
148 | e->cmd = cmd; | |
149 | ||
150 | return e; | |
151 | } | |
152 | ||
153 | static int taprio_parse_opt(struct qdisc_util *qu, int argc, | |
154 | char **argv, struct nlmsghdr *n, const char *dev) | |
155 | { | |
156 | __s32 clockid = CLOCKID_INVALID; | |
157 | struct tc_mqprio_qopt opt = { }; | |
158 | struct list_head sched_entries; | |
159 | struct rtattr *tail; | |
160 | __s64 base_time = 0; | |
161 | int err, idx; | |
162 | ||
163 | INIT_LIST_HEAD(&sched_entries); | |
164 | ||
165 | while (argc > 0) { | |
166 | idx = 0; | |
167 | if (strcmp(*argv, "num_tc") == 0) { | |
168 | NEXT_ARG(); | |
169 | if (get_u8(&opt.num_tc, *argv, 10)) { | |
170 | fprintf(stderr, "Illegal \"num_tc\"\n"); | |
171 | return -1; | |
172 | } | |
173 | } else if (strcmp(*argv, "map") == 0) { | |
174 | while (idx < TC_QOPT_MAX_QUEUE && NEXT_ARG_OK()) { | |
175 | NEXT_ARG(); | |
176 | if (get_u8(&opt.prio_tc_map[idx], *argv, 10)) { | |
177 | PREV_ARG(); | |
178 | break; | |
179 | } | |
180 | idx++; | |
181 | } | |
182 | for ( ; idx < TC_QOPT_MAX_QUEUE; idx++) | |
183 | opt.prio_tc_map[idx] = 0; | |
184 | } else if (strcmp(*argv, "queues") == 0) { | |
185 | char *tmp, *tok; | |
186 | ||
187 | while (idx < TC_QOPT_MAX_QUEUE && NEXT_ARG_OK()) { | |
188 | NEXT_ARG(); | |
189 | ||
190 | tmp = strdup(*argv); | |
191 | if (!tmp) | |
192 | break; | |
193 | ||
194 | tok = strtok(tmp, "@"); | |
195 | if (get_u16(&opt.count[idx], tok, 10)) { | |
196 | free(tmp); | |
197 | PREV_ARG(); | |
198 | break; | |
199 | } | |
200 | tok = strtok(NULL, "@"); | |
201 | if (get_u16(&opt.offset[idx], tok, 10)) { | |
202 | free(tmp); | |
203 | PREV_ARG(); | |
204 | break; | |
205 | } | |
206 | free(tmp); | |
207 | idx++; | |
208 | } | |
209 | } else if (strcmp(*argv, "sched-entry") == 0) { | |
210 | uint32_t mask, interval; | |
211 | struct sched_entry *e; | |
212 | uint8_t cmd; | |
213 | ||
214 | NEXT_ARG(); | |
215 | err = str_to_entry_cmd(*argv); | |
216 | if (err < 0) { | |
217 | explain_sched_entry(); | |
218 | return -1; | |
219 | } | |
220 | cmd = err; | |
221 | ||
222 | NEXT_ARG(); | |
223 | if (get_u32(&mask, *argv, 16)) { | |
224 | explain_sched_entry(); | |
225 | return -1; | |
226 | } | |
227 | ||
228 | NEXT_ARG(); | |
229 | if (get_u32(&interval, *argv, 0)) { | |
230 | explain_sched_entry(); | |
231 | return -1; | |
232 | } | |
233 | ||
234 | e = create_entry(mask, interval, cmd); | |
235 | if (!e) { | |
236 | fprintf(stderr, "taprio: not enough memory for new schedule entry\n"); | |
237 | return -1; | |
238 | } | |
239 | ||
240 | list_add_tail(&e->list, &sched_entries); | |
241 | ||
242 | } else if (strcmp(*argv, "base-time") == 0) { | |
243 | NEXT_ARG(); | |
244 | if (get_s64(&base_time, *argv, 10)) { | |
245 | PREV_ARG(); | |
246 | break; | |
247 | } | |
248 | } else if (strcmp(*argv, "clockid") == 0) { | |
249 | NEXT_ARG(); | |
250 | if (clockid != CLOCKID_INVALID) { | |
251 | fprintf(stderr, "taprio: duplicate \"clockid\" specification\n"); | |
252 | return -1; | |
253 | } | |
254 | if (get_clockid(&clockid, *argv)) { | |
255 | explain_clockid(*argv); | |
256 | return -1; | |
257 | } | |
258 | } else if (strcmp(*argv, "help") == 0) { | |
259 | explain(); | |
260 | return -1; | |
261 | } else { | |
262 | fprintf(stderr, "Unknown argument\n"); | |
263 | return -1; | |
264 | } | |
265 | argc--; argv++; | |
266 | } | |
267 | ||
268 | tail = NLMSG_TAIL(n); | |
269 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); | |
270 | ||
271 | if (opt.num_tc > 0) | |
272 | addattr_l(n, 1024, TCA_TAPRIO_ATTR_PRIOMAP, &opt, sizeof(opt)); | |
273 | ||
274 | if (base_time) | |
275 | addattr_l(n, 1024, TCA_TAPRIO_ATTR_SCHED_BASE_TIME, &base_time, sizeof(base_time)); | |
276 | ||
277 | addattr_l(n, 1024, TCA_TAPRIO_ATTR_SCHED_CLOCKID, &clockid, sizeof(clockid)); | |
278 | ||
279 | if (!list_empty(&sched_entries)) { | |
280 | struct rtattr *entry_list; | |
281 | entry_list = addattr_nest(n, 1024, TCA_TAPRIO_ATTR_SCHED_ENTRY_LIST | NLA_F_NESTED); | |
282 | ||
283 | err = add_sched_list(&sched_entries, n); | |
284 | if (err < 0) { | |
285 | fprintf(stderr, "Could not add schedule to netlink message\n"); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | addattr_nest_end(n, entry_list); | |
290 | } | |
291 | ||
292 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static int print_sched_list(FILE *f, struct rtattr *list) | |
298 | { | |
299 | struct rtattr *item; | |
300 | int rem; | |
301 | ||
302 | if (list == NULL) | |
303 | return 0; | |
304 | ||
305 | rem = RTA_PAYLOAD(list); | |
306 | ||
307 | open_json_array(PRINT_JSON, "schedule"); | |
308 | ||
309 | for (item = RTA_DATA(list); RTA_OK(item, rem); item = RTA_NEXT(item, rem)) { | |
310 | struct rtattr *tb[TCA_TAPRIO_SCHED_ENTRY_MAX + 1]; | |
311 | __u32 index = 0, gatemask = 0, interval = 0; | |
312 | __u8 command = 0; | |
313 | ||
314 | parse_rtattr_nested(tb, TCA_TAPRIO_SCHED_ENTRY_MAX, item); | |
315 | ||
316 | if (tb[TCA_TAPRIO_SCHED_ENTRY_INDEX]) | |
317 | index = rta_getattr_u32(tb[TCA_TAPRIO_SCHED_ENTRY_INDEX]); | |
318 | ||
319 | if (tb[TCA_TAPRIO_SCHED_ENTRY_CMD]) | |
320 | command = rta_getattr_u8(tb[TCA_TAPRIO_SCHED_ENTRY_CMD]); | |
321 | ||
322 | if (tb[TCA_TAPRIO_SCHED_ENTRY_GATE_MASK]) | |
323 | gatemask = rta_getattr_u32(tb[TCA_TAPRIO_SCHED_ENTRY_GATE_MASK]); | |
324 | ||
325 | if (tb[TCA_TAPRIO_SCHED_ENTRY_INTERVAL]) | |
326 | interval = rta_getattr_u32(tb[TCA_TAPRIO_SCHED_ENTRY_INTERVAL]); | |
327 | ||
328 | open_json_object(NULL); | |
329 | print_uint(PRINT_ANY, "index", "\tindex %u", index); | |
330 | print_string(PRINT_ANY, "cmd", " cmd %s", entry_cmd_to_str(command)); | |
90c5c969 | 331 | print_0xhex(PRINT_ANY, "gatemask", " gatemask %#llx", gatemask); |
0dd16449 VCG |
332 | print_uint(PRINT_ANY, "interval", " interval %u", interval); |
333 | close_json_object(); | |
334 | ||
335 | print_string(PRINT_FP, NULL, "%s", _SL_); | |
336 | } | |
337 | ||
338 | close_json_array(PRINT_ANY, ""); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static int taprio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
344 | { | |
345 | struct rtattr *tb[TCA_TAPRIO_ATTR_MAX + 1]; | |
346 | struct tc_mqprio_qopt *qopt = 0; | |
347 | __s32 clockid = CLOCKID_INVALID; | |
348 | __s64 base_time = 0; | |
349 | int i; | |
350 | ||
351 | if (opt == NULL) | |
352 | return 0; | |
353 | ||
354 | parse_rtattr_nested(tb, TCA_TAPRIO_ATTR_MAX, opt); | |
355 | ||
356 | if (tb[TCA_TAPRIO_ATTR_PRIOMAP] == NULL) | |
357 | return -1; | |
358 | ||
359 | qopt = RTA_DATA(tb[TCA_TAPRIO_ATTR_PRIOMAP]); | |
360 | ||
361 | print_uint(PRINT_ANY, "tc", "tc %u ", qopt->num_tc); | |
362 | ||
363 | open_json_array(PRINT_ANY, "map"); | |
364 | for (i = 0; i <= TC_PRIO_MAX; i++) | |
365 | print_uint(PRINT_ANY, NULL, " %u", qopt->prio_tc_map[i]); | |
366 | close_json_array(PRINT_ANY, ""); | |
367 | ||
368 | print_string(PRINT_FP, NULL, "%s", _SL_); | |
369 | ||
370 | open_json_array(PRINT_ANY, "queues"); | |
371 | for (i = 0; i < qopt->num_tc; i++) { | |
372 | open_json_object(NULL); | |
373 | print_uint(PRINT_ANY, "offset", " offset %u", qopt->offset[i]); | |
374 | print_uint(PRINT_ANY, "count", " count %u", qopt->count[i]); | |
375 | close_json_object(); | |
376 | } | |
377 | close_json_array(PRINT_ANY, ""); | |
378 | ||
379 | print_string(PRINT_FP, NULL, "%s", _SL_); | |
380 | ||
381 | if (tb[TCA_TAPRIO_ATTR_SCHED_BASE_TIME]) | |
382 | base_time = rta_getattr_s64(tb[TCA_TAPRIO_ATTR_SCHED_BASE_TIME]); | |
383 | ||
384 | if (tb[TCA_TAPRIO_ATTR_SCHED_CLOCKID]) | |
385 | clockid = rta_getattr_s32(tb[TCA_TAPRIO_ATTR_SCHED_CLOCKID]); | |
386 | ||
387 | print_string(PRINT_ANY, "clockid", "clockid %s", get_clock_name(clockid)); | |
388 | ||
389 | print_lluint(PRINT_ANY, "base_time", " base-time %lld", base_time); | |
390 | ||
391 | print_string(PRINT_FP, NULL, "%s", _SL_); | |
392 | ||
393 | return print_sched_list(f, tb[TCA_TAPRIO_ATTR_SCHED_ENTRY_LIST]); | |
394 | } | |
395 | ||
396 | struct qdisc_util taprio_qdisc_util = { | |
397 | .id = "taprio", | |
398 | .parse_qopt = taprio_parse_opt, | |
399 | .print_qopt = taprio_print_opt, | |
400 | }; |