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Diffstat (limited to '')
| -rw-r--r-- | tc/q_etf.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/tc/q_etf.c b/tc/q_etf.c new file mode 100644 index 0000000..c209058 --- /dev/null +++ b/tc/q_etf.c @@ -0,0 +1,193 @@ +/* + * q_etf.c Earliest TxTime First (ETF). + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Authors: Vinicius Costa Gomes <vinicius.gomes@intel.com> + * Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <string.h> + +#include "utils.h" +#include "tc_util.h" + +#define CLOCKID_INVALID (-1) +static const struct static_clockid { + const char *name; + clockid_t clockid; +} clockids_sysv[] = { + { "REALTIME", CLOCK_REALTIME }, + { "TAI", CLOCK_TAI }, + { "BOOTTIME", CLOCK_BOOTTIME }, + { "MONOTONIC", CLOCK_MONOTONIC }, + { NULL } +}; + +static void explain(void) +{ + fprintf(stderr, + "Usage: ... etf delta NANOS clockid CLOCKID [offload] [deadline_mode]\n" + "CLOCKID must be a valid SYS-V id (i.e. CLOCK_TAI)\n"); +} + +static void explain1(const char *arg, const char *val) +{ + fprintf(stderr, "etf: illegal value for \"%s\": \"%s\"\n", arg, val); +} + +static void explain_clockid(const char *val) +{ + fprintf(stderr, + "etf: illegal value for \"clockid\": \"%s\".\n" + "It must be a valid SYS-V id (i.e. CLOCK_TAI)\n", + val); +} + +static int get_clockid(__s32 *val, const char *arg) +{ + const struct static_clockid *c; + + /* Drop the CLOCK_ prefix if that is being used. */ + if (strcasestr(arg, "CLOCK_") != NULL) + arg += sizeof("CLOCK_") - 1; + + for (c = clockids_sysv; c->name; c++) { + if (strcasecmp(c->name, arg) == 0) { + *val = c->clockid; + + return 0; + } + } + + return -1; +} + +static const char* get_clock_name(clockid_t clockid) +{ + const struct static_clockid *c; + + for (c = clockids_sysv; c->name; c++) { + if (clockid == c->clockid) + return c->name; + } + + return "invalid"; +} + +static int etf_parse_opt(struct qdisc_util *qu, int argc, + char **argv, struct nlmsghdr *n, const char *dev) +{ + struct tc_etf_qopt opt = { + .clockid = CLOCKID_INVALID, + }; + struct rtattr *tail; + + while (argc > 0) { + if (matches(*argv, "offload") == 0) { + if (opt.flags & TC_ETF_OFFLOAD_ON) { + fprintf(stderr, "etf: duplicate \"offload\" specification\n"); + return -1; + } + + opt.flags |= TC_ETF_OFFLOAD_ON; + } else if (matches(*argv, "deadline_mode") == 0) { + if (opt.flags & TC_ETF_DEADLINE_MODE_ON) { + fprintf(stderr, "etf: duplicate \"deadline_mode\" specification\n"); + return -1; + } + + opt.flags |= TC_ETF_DEADLINE_MODE_ON; + } else if (matches(*argv, "delta") == 0) { + NEXT_ARG(); + if (opt.delta) { + fprintf(stderr, "etf: duplicate \"delta\" specification\n"); + return -1; + } + if (get_s32(&opt.delta, *argv, 0)) { + explain1("delta", *argv); + return -1; + } + } else if (matches(*argv, "clockid") == 0) { + NEXT_ARG(); + if (opt.clockid != CLOCKID_INVALID) { + fprintf(stderr, "etf: duplicate \"clockid\" specification\n"); + return -1; + } + if (get_clockid(&opt.clockid, *argv)) { + explain_clockid(*argv); + return -1; + } + } else if (strcmp(*argv, "skip_sock_check") == 0) { + if (opt.flags & TC_ETF_SKIP_SOCK_CHECK) { + fprintf(stderr, "etf: duplicate \"skip_sock_check\" specification\n"); + return -1; + } + + opt.flags |= TC_ETF_SKIP_SOCK_CHECK; + } else if (strcmp(*argv, "help") == 0) { + explain(); + return -1; + } else { + fprintf(stderr, "etf: unknown parameter \"%s\"\n", *argv); + explain(); + return -1; + } + argc--; argv++; + } + + tail = NLMSG_TAIL(n); + addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); + addattr_l(n, 2024, TCA_ETF_PARMS, &opt, sizeof(opt)); + tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; + return 0; +} + +static int etf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) +{ + struct rtattr *tb[TCA_ETF_MAX+1]; + struct tc_etf_qopt *qopt; + + if (opt == NULL) + return 0; + + parse_rtattr_nested(tb, TCA_ETF_MAX, opt); + + if (tb[TCA_ETF_PARMS] == NULL) + return -1; + + qopt = RTA_DATA(tb[TCA_ETF_PARMS]); + if (RTA_PAYLOAD(tb[TCA_ETF_PARMS]) < sizeof(*qopt)) + return -1; + + print_string(PRINT_ANY, "clockid", "clockid %s ", + get_clock_name(qopt->clockid)); + + print_uint(PRINT_ANY, "delta", "delta %d ", qopt->delta); + print_string(PRINT_ANY, "offload", "offload %s ", + (qopt->flags & TC_ETF_OFFLOAD_ON) ? "on" : "off"); + print_string(PRINT_ANY, "deadline_mode", "deadline_mode %s ", + (qopt->flags & TC_ETF_DEADLINE_MODE_ON) ? "on" : "off"); + print_string(PRINT_ANY, "skip_sock_check", "skip_sock_check %s", + (qopt->flags & TC_ETF_SKIP_SOCK_CHECK) ? "on" : "off"); + + return 0; +} + +struct qdisc_util etf_qdisc_util = { + .id = "etf", + .parse_qopt = etf_parse_opt, + .print_qopt = etf_print_opt, +}; |