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d2773f1261
Add a new module to generate and parse options specific to the ETS Qdisc.
Example output:
bands 8 strict 3 priomap 0 1 2 3 4 5 6 7
qdisc ets 1: root refcnt 2 offloaded bands 8 strict 3 quanta 1514 1514 1514 1514 1514 priomap 0 1 2 3 4 5 6 7 7 7 7 7 7 7 7 7
[
{
"kind": "ets",
"handle": "1:",
"root": true,
"refcnt": 2,
"offloaded": true,
"options": {
"bands": 8,
"strict": 3,
"quanta": [1514, 1514, 1514, 1514, 1514],
"priomap": [0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7]
}
}
]
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
343 lines
7.7 KiB
C
343 lines
7.7 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Enhanced Transmission Selection - 802.1Qaz-based Qdisc
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... ets [bands NUMBER] [strict NUMBER] [quanta Q1 Q2...] [priomap P1 P2...]\n");
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}
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static void cexplain(void)
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{
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fprintf(stderr, "Usage: ... ets [quantum Q1]\n");
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}
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static unsigned int parse_quantum(const char *arg)
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{
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unsigned int quantum;
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if (get_unsigned(&quantum, arg, 10)) {
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fprintf(stderr, "Illegal \"quanta\" element\n");
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return 0;
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}
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if (!quantum)
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fprintf(stderr, "\"quanta\" must be > 0\n");
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return quantum;
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}
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static int parse_nbands(const char *arg, __u8 *pnbands, const char *what)
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{
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unsigned int tmp;
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if (get_unsigned(&tmp, arg, 10)) {
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fprintf(stderr, "Illegal \"%s\"\n", what);
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return -1;
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}
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if (tmp > TCQ_ETS_MAX_BANDS) {
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fprintf(stderr, "The number of \"%s\" must be <= %d\n",
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what, TCQ_ETS_MAX_BANDS);
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return -1;
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}
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*pnbands = tmp;
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return 0;
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}
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static int ets_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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struct nlmsghdr *n, const char *dev)
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{
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__u8 nbands = 0;
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__u8 nstrict = 0;
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bool quanta_mode = false;
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unsigned int nquanta = 0;
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__u32 quanta[TCQ_ETS_MAX_BANDS];
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bool priomap_mode = false;
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unsigned int nprio = 0;
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__u8 priomap[TC_PRIO_MAX + 1];
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unsigned int tmp;
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struct rtattr *tail, *nest;
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while (argc > 0) {
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if (strcmp(*argv, "bands") == 0) {
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if (nbands) {
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fprintf(stderr, "Duplicate \"bands\"\n");
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return -1;
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}
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NEXT_ARG();
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if (parse_nbands(*argv, &nbands, "bands"))
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return -1;
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priomap_mode = quanta_mode = false;
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} else if (strcmp(*argv, "strict") == 0) {
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if (nstrict) {
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fprintf(stderr, "Duplicate \"strict\"\n");
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return -1;
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}
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NEXT_ARG();
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if (parse_nbands(*argv, &nstrict, "strict"))
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return -1;
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priomap_mode = quanta_mode = false;
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} else if (strcmp(*argv, "quanta") == 0) {
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if (nquanta) {
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fprintf(stderr, "Duplicate \"quanta\"\n");
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return -1;
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}
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NEXT_ARG();
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priomap_mode = false;
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quanta_mode = true;
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goto parse_quantum;
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} else if (strcmp(*argv, "priomap") == 0) {
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if (nprio) {
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fprintf(stderr, "Duplicate \"priomap\"\n");
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return -1;
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}
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NEXT_ARG();
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priomap_mode = true;
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quanta_mode = false;
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goto parse_priomap;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else if (quanta_mode) {
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unsigned int quantum;
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parse_quantum:
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quantum = parse_quantum(*argv);
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if (!quantum)
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return -1;
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quanta[nquanta++] = quantum;
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} else if (priomap_mode) {
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unsigned int band;
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parse_priomap:
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if (get_unsigned(&band, *argv, 10)) {
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fprintf(stderr, "Illegal \"priomap\" element\n");
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return -1;
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}
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if (nprio > TC_PRIO_MAX) {
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fprintf(stderr, "\"priomap\" index cannot be higher than %u\n", TC_PRIO_MAX);
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return -1;
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}
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priomap[nprio++] = band;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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if (!nbands)
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nbands = nquanta + nstrict;
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if (!nbands) {
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fprintf(stderr, "One of \"bands\", \"quanta\" or \"strict\" needs to be specified\n");
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explain();
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return -1;
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}
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if (nbands < 1) {
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fprintf(stderr, "The number of \"bands\" must be >= 1\n");
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explain();
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return -1;
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}
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if (nstrict + nquanta > nbands) {
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fprintf(stderr, "Not enough total bands to cover all the strict bands and quanta\n");
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explain();
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return -1;
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}
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for (tmp = 0; tmp < nprio; tmp++) {
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if (priomap[tmp] >= nbands) {
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fprintf(stderr, "\"priomap\" element is out of bounds\n");
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return -1;
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}
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}
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tail = addattr_nest(n, 1024, TCA_OPTIONS | NLA_F_NESTED);
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addattr_l(n, 1024, TCA_ETS_NBANDS, &nbands, sizeof(nbands));
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if (nstrict)
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addattr_l(n, 1024, TCA_ETS_NSTRICT, &nstrict, sizeof(nstrict));
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if (nquanta) {
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nest = addattr_nest(n, 1024, TCA_ETS_QUANTA | NLA_F_NESTED);
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for (tmp = 0; tmp < nquanta; tmp++)
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addattr_l(n, 1024, TCA_ETS_QUANTA_BAND,
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&quanta[tmp], sizeof(quanta[0]));
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addattr_nest_end(n, nest);
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}
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if (nprio) {
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nest = addattr_nest(n, 1024, TCA_ETS_PRIOMAP | NLA_F_NESTED);
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for (tmp = 0; tmp < nprio; tmp++)
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addattr_l(n, 1024, TCA_ETS_PRIOMAP_BAND,
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&priomap[tmp], sizeof(priomap[0]));
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addattr_nest_end(n, nest);
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}
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addattr_nest_end(n, tail);
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return 0;
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}
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static int ets_parse_copt(struct qdisc_util *qu, int argc, char **argv,
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struct nlmsghdr *n, const char *dev)
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{
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unsigned int quantum = 0;
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struct rtattr *tail;
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while (argc > 0) {
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if (strcmp(*argv, "quantum") == 0) {
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if (quantum) {
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fprintf(stderr, "Duplicate \"quantum\"\n");
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return -1;
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}
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NEXT_ARG();
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quantum = parse_quantum(*argv);
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if (!quantum)
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return -1;
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} else if (strcmp(*argv, "help") == 0) {
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cexplain();
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return -1;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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cexplain();
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return -1;
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}
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argc--; argv++;
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}
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tail = addattr_nest(n, 1024, TCA_OPTIONS | NLA_F_NESTED);
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if (quantum)
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addattr_l(n, 1024, TCA_ETS_QUANTA_BAND, &quantum,
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sizeof(quantum));
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addattr_nest_end(n, tail);
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return 0;
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}
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static int ets_print_opt_quanta(struct rtattr *opt)
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{
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int len = RTA_PAYLOAD(opt);
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unsigned int offset;
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open_json_array(PRINT_ANY, "quanta");
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for (offset = 0; offset < len; ) {
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struct rtattr *tb[TCA_ETS_MAX + 1] = {NULL};
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struct rtattr *attr;
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__u32 quantum;
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attr = RTA_DATA(opt) + offset;
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parse_rtattr(tb, TCA_ETS_MAX, attr, len - offset);
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offset += RTA_LENGTH(RTA_PAYLOAD(attr));
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if (!tb[TCA_ETS_QUANTA_BAND]) {
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fprintf(stderr, "No ETS band quantum\n");
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return -1;
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}
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quantum = rta_getattr_u32(tb[TCA_ETS_QUANTA_BAND]);
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print_uint(PRINT_ANY, NULL, " %u", quantum);
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}
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close_json_array(PRINT_ANY, " ");
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return 0;
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}
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static int ets_print_opt_priomap(struct rtattr *opt)
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{
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int len = RTA_PAYLOAD(opt);
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unsigned int offset;
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open_json_array(PRINT_ANY, "priomap");
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for (offset = 0; offset < len; ) {
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struct rtattr *tb[TCA_ETS_MAX + 1] = {NULL};
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struct rtattr *attr;
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__u8 band;
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attr = RTA_DATA(opt) + offset;
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parse_rtattr(tb, TCA_ETS_MAX, attr, len - offset);
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offset += RTA_LENGTH(RTA_PAYLOAD(attr)) + 3 /* padding */;
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if (!tb[TCA_ETS_PRIOMAP_BAND]) {
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fprintf(stderr, "No ETS priomap band\n");
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return -1;
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}
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band = rta_getattr_u8(tb[TCA_ETS_PRIOMAP_BAND]);
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print_uint(PRINT_ANY, NULL, " %u", band);
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}
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close_json_array(PRINT_ANY, " ");
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return 0;
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}
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static int ets_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_ETS_MAX + 1];
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__u8 nbands;
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__u8 nstrict;
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int err;
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_ETS_MAX, opt);
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if (!tb[TCA_ETS_NBANDS] || !tb[TCA_ETS_PRIOMAP]) {
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fprintf(stderr, "Incomplete ETS options\n");
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return -1;
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}
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nbands = rta_getattr_u8(tb[TCA_ETS_NBANDS]);
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print_uint(PRINT_ANY, "bands", "bands %u ", nbands);
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if (tb[TCA_ETS_NSTRICT]) {
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nstrict = rta_getattr_u8(tb[TCA_ETS_NSTRICT]);
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print_uint(PRINT_ANY, "strict", "strict %u ", nstrict);
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}
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if (tb[TCA_ETS_QUANTA]) {
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err = ets_print_opt_quanta(tb[TCA_ETS_QUANTA]);
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if (err)
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return err;
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}
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return ets_print_opt_priomap(tb[TCA_ETS_PRIOMAP]);
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}
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static int ets_print_copt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_ETS_MAX + 1];
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__u32 quantum;
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_ETS_MAX, opt);
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if (tb[TCA_ETS_QUANTA_BAND]) {
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quantum = rta_getattr_u32(tb[TCA_ETS_QUANTA_BAND]);
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print_uint(PRINT_ANY, "quantum", "quantum %u ", quantum);
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}
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return 0;
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}
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struct qdisc_util ets_qdisc_util = {
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.id = "ets",
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.parse_qopt = ets_parse_opt,
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.parse_copt = ets_parse_copt,
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.print_qopt = ets_print_opt,
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.print_copt = ets_print_copt,
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};
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