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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 14:18:53 +0000 |
commit | a0e0018c9a7ef5ce7f6d2c3ae16aecbbd16a8f67 (patch) | |
tree | 8feaf1a1932871b139b3b30be4c09c66489918be /tc/tc_qdisc.c | |
parent | Initial commit. (diff) | |
download | iproute2-upstream.tar.xz iproute2-upstream.zip |
Adding upstream version 6.1.0.upstream/6.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | tc/tc_qdisc.c | 546 |
1 files changed, 546 insertions, 0 deletions
diff --git a/tc/tc_qdisc.c b/tc/tc_qdisc.c new file mode 100644 index 0000000..33a6665 --- /dev/null +++ b/tc/tc_qdisc.c @@ -0,0 +1,546 @@ +/* + * tc_qdisc.c "tc qdisc". + * + * 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> + * J Hadi Salim: Extension to ingress + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <string.h> +#include <math.h> +#include <malloc.h> + +#include "utils.h" +#include "tc_util.h" +#include "tc_common.h" + +static int usage(void) +{ + fprintf(stderr, + "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n" + " [ handle QHANDLE ] [ root | ingress | clsact | parent CLASSID ]\n" + " [ estimator INTERVAL TIME_CONSTANT ]\n" + " [ stab [ help | STAB_OPTIONS] ]\n" + " [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n" + " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n" + "\n" + " tc qdisc { show | list } [ dev STRING ] [ QDISC_ID ] [ invisible ]\n" + "Where:\n" + "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n" + "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n" + "STAB_OPTIONS := ... try tc qdisc add stab help\n" + "QDISC_ID := { root | ingress | handle QHANDLE | parent CLASSID }\n"); + return -1; +} + +static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv) +{ + struct qdisc_util *q = NULL; + struct tc_estimator est = {}; + struct { + struct tc_sizespec szopts; + __u16 *data; + } stab = {}; + char d[IFNAMSIZ] = {}; + char k[FILTER_NAMESZ] = {}; + struct { + struct nlmsghdr n; + struct tcmsg t; + char buf[TCA_BUF_MAX]; + } req = { + .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), + .n.nlmsg_flags = NLM_F_REQUEST | flags, + .n.nlmsg_type = cmd, + .t.tcm_family = AF_UNSPEC, + }; + __u32 ingress_block = 0; + __u32 egress_block = 0; + + while (argc > 0) { + if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + if (d[0]) + duparg("dev", *argv); + strncpy(d, *argv, sizeof(d)-1); + } else if (strcmp(*argv, "handle") == 0) { + __u32 handle; + + if (req.t.tcm_handle) + duparg("handle", *argv); + NEXT_ARG(); + if (get_qdisc_handle(&handle, *argv)) + invarg("invalid qdisc ID", *argv); + req.t.tcm_handle = handle; + } else if (strcmp(*argv, "root") == 0) { + if (req.t.tcm_parent) { + fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); + return -1; + } + req.t.tcm_parent = TC_H_ROOT; + } else if (strcmp(*argv, "clsact") == 0) { + if (req.t.tcm_parent) { + fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n"); + return -1; + } + req.t.tcm_parent = TC_H_CLSACT; + strncpy(k, "clsact", sizeof(k) - 1); + q = get_qdisc_kind(k); + req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0); + NEXT_ARG_FWD(); + break; + } else if (strcmp(*argv, "ingress") == 0) { + if (req.t.tcm_parent) { + fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n"); + return -1; + } + req.t.tcm_parent = TC_H_INGRESS; + strncpy(k, "ingress", sizeof(k) - 1); + q = get_qdisc_kind(k); + req.t.tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0); + NEXT_ARG_FWD(); + break; + } else if (strcmp(*argv, "parent") == 0) { + __u32 handle; + + NEXT_ARG(); + if (req.t.tcm_parent) + duparg("parent", *argv); + if (get_tc_classid(&handle, *argv)) + invarg("invalid parent ID", *argv); + req.t.tcm_parent = handle; + } else if (matches(*argv, "estimator") == 0) { + if (parse_estimator(&argc, &argv, &est)) + return -1; + } else if (matches(*argv, "stab") == 0) { + if (parse_size_table(&argc, &argv, &stab.szopts) < 0) + return -1; + continue; + } else if (matches(*argv, "ingress_block") == 0) { + NEXT_ARG(); + if (get_u32(&ingress_block, *argv, 0) || !ingress_block) + invarg("invalid ingress block index value", *argv); + } else if (matches(*argv, "egress_block") == 0) { + NEXT_ARG(); + if (get_u32(&egress_block, *argv, 0) || !egress_block) + invarg("invalid egress block index value", *argv); + } else if (matches(*argv, "help") == 0) { + usage(); + } else { + strncpy(k, *argv, sizeof(k)-1); + + q = get_qdisc_kind(k); + argc--; argv++; + break; + } + argc--; argv++; + } + + if (k[0]) + addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); + if (est.ewma_log) + addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); + + if (ingress_block) + addattr32(&req.n, sizeof(req), + TCA_INGRESS_BLOCK, ingress_block); + if (egress_block) + addattr32(&req.n, sizeof(req), + TCA_EGRESS_BLOCK, egress_block); + + if (q) { + if (q->parse_qopt) { + if (q->parse_qopt(q, argc, argv, &req.n, d)) + return 1; + } else if (argc) { + fprintf(stderr, "qdisc '%s' does not support option parsing\n", k); + return -1; + } + } else { + if (argc) { + if (matches(*argv, "help") == 0) + usage(); + + fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv); + return -1; + } + } + + if (check_size_table_opts(&stab.szopts)) { + struct rtattr *tail; + + if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) { + fprintf(stderr, "failed to calculate size table.\n"); + return -1; + } + + tail = addattr_nest(&req.n, sizeof(req), TCA_STAB); + addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts, + sizeof(stab.szopts)); + if (stab.data) + addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data, + stab.szopts.tsize * sizeof(__u16)); + addattr_nest_end(&req.n, tail); + if (stab.data) + free(stab.data); + } + + if (d[0]) { + int idx; + + ll_init_map(&rth); + + idx = ll_name_to_index(d); + if (!idx) + return -nodev(d); + req.t.tcm_ifindex = idx; + } + + if (rtnl_talk(&rth, &req.n, NULL) < 0) + return 2; + + return 0; +} + +static int filter_ifindex; +static __u32 filter_parent; +static __u32 filter_handle; + +int print_qdisc(struct nlmsghdr *n, void *arg) +{ + FILE *fp = (FILE *)arg; + struct tcmsg *t = NLMSG_DATA(n); + int len = n->nlmsg_len; + struct rtattr *tb[TCA_MAX+1]; + struct qdisc_util *q; + char abuf[256]; + + if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) { + fprintf(stderr, "Not a qdisc\n"); + return 0; + } + len -= NLMSG_LENGTH(sizeof(*t)); + if (len < 0) { + fprintf(stderr, "Wrong len %d\n", len); + return -1; + } + + if (filter_ifindex && filter_ifindex != t->tcm_ifindex) + return 0; + + if (filter_handle && filter_handle != t->tcm_handle) + return 0; + + if (filter_parent && filter_parent != t->tcm_parent) + return 0; + + parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED); + + if (tb[TCA_KIND] == NULL) { + fprintf(stderr, "print_qdisc: NULL kind\n"); + return -1; + } + + open_json_object(NULL); + + if (n->nlmsg_type == RTM_DELQDISC) + print_bool(PRINT_ANY, "deleted", "deleted ", true); + + if (n->nlmsg_type == RTM_NEWQDISC && + (n->nlmsg_flags & NLM_F_CREATE) && + (n->nlmsg_flags & NLM_F_REPLACE)) + print_bool(PRINT_ANY, "replaced", "replaced ", true); + + if (n->nlmsg_type == RTM_NEWQDISC && + (n->nlmsg_flags & NLM_F_CREATE) && + (n->nlmsg_flags & NLM_F_EXCL)) + print_bool(PRINT_ANY, "added", "added ", true); + + print_string(PRINT_ANY, "kind", "qdisc %s", + rta_getattr_str(tb[TCA_KIND])); + sprintf(abuf, "%x:", t->tcm_handle >> 16); + print_string(PRINT_ANY, "handle", " %s", abuf); + if (show_raw) { + sprintf(abuf, "[%08x]", t->tcm_handle); + print_string(PRINT_FP, NULL, "%s", abuf); + } + print_string(PRINT_FP, NULL, " ", NULL); + + if (filter_ifindex == 0) + print_devname(PRINT_ANY, t->tcm_ifindex); + + if (t->tcm_parent == TC_H_ROOT) + print_bool(PRINT_ANY, "root", "root ", true); + else if (t->tcm_parent) { + print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); + print_string(PRINT_ANY, "parent", "parent %s ", abuf); + } + + if (t->tcm_info != 1) + print_uint(PRINT_ANY, "refcnt", "refcnt %u ", t->tcm_info); + + if (tb[TCA_HW_OFFLOAD] && + (rta_getattr_u8(tb[TCA_HW_OFFLOAD]))) + print_bool(PRINT_ANY, "offloaded", "offloaded ", true); + + if (tb[TCA_INGRESS_BLOCK] && + RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) { + __u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]); + + if (block) + print_uint(PRINT_ANY, "ingress_block", + "ingress_block %u ", block); + } + + if (tb[TCA_EGRESS_BLOCK] && + RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) { + __u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]); + + if (block) + print_uint(PRINT_ANY, "egress_block", + "egress_block %u ", block); + } + + /* pfifo_fast is generic enough to warrant the hardcoding --JHS */ + if (strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])) == 0) + q = get_qdisc_kind("prio"); + else + q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); + + open_json_object("options"); + if (tb[TCA_OPTIONS]) { + if (q) + q->print_qopt(q, fp, tb[TCA_OPTIONS]); + else + fprintf(stderr, "Cannot parse qdisc parameters\n"); + } + close_json_object(); + + print_nl(); + + if (show_details && tb[TCA_STAB]) { + print_size_table(tb[TCA_STAB]); + print_nl(); + } + + if (show_stats) { + struct rtattr *xstats = NULL; + + if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) { + print_tcstats_attr(fp, tb, " ", &xstats); + print_nl(); + } + + if (q && xstats && q->print_xstats) { + q->print_xstats(q, fp, xstats); + print_nl(); + } + } + close_json_object(); + fflush(fp); + return 0; +} + +static int tc_qdisc_list(int argc, char **argv) +{ + struct { + struct nlmsghdr n; + struct tcmsg t; + char buf[256]; + } req = { + .n.nlmsg_type = RTM_GETQDISC, + .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), + .t.tcm_family = AF_UNSPEC, + }; + + char d[IFNAMSIZ] = {}; + bool dump_invisible = false; + __u32 handle; + + while (argc > 0) { + if (strcmp(*argv, "dev") == 0) { + NEXT_ARG(); + strncpy(d, *argv, sizeof(d)-1); + } else if (strcmp(*argv, "root") == 0) { + if (filter_parent) + invarg("parent is already specified", *argv); + else if (filter_handle) + invarg("handle is already specified", *argv); + filter_parent = TC_H_ROOT; + } else if (strcmp(*argv, "ingress") == 0 || + strcmp(*argv, "clsact") == 0) { + if (filter_parent) + invarg("parent is already specified", *argv); + else if (filter_handle) + invarg("handle is already specified", *argv); + filter_parent = TC_H_INGRESS; + } else if (matches(*argv, "parent") == 0) { + if (filter_parent) + invarg("parent is already specified", *argv); + else if (filter_handle) + invarg("handle is already specified", *argv); + NEXT_ARG(); + if (get_tc_classid(&handle, *argv)) + invarg("invalid parent ID", *argv); + filter_parent = handle; + } else if (matches(*argv, "handle") == 0) { + if (filter_parent) + invarg("parent is already specified", *argv); + else if (filter_handle) + invarg("handle is already specified", *argv); + NEXT_ARG(); + if (get_qdisc_handle(&handle, *argv)) + invarg("invalid handle ID", *argv); + filter_handle = handle; + } else if (matches(*argv, "help") == 0) { + usage(); + } else if (strcmp(*argv, "invisible") == 0) { + dump_invisible = true; + } else { + fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); + return -1; + } + + argc--; argv++; + } + + ll_init_map(&rth); + + if (d[0]) { + req.t.tcm_ifindex = ll_name_to_index(d); + if (!req.t.tcm_ifindex) + return -nodev(d); + filter_ifindex = req.t.tcm_ifindex; + } + + if (dump_invisible) { + addattr(&req.n, 256, TCA_DUMP_INVISIBLE); + } + + if (rtnl_dump_request_n(&rth, &req.n) < 0) { + perror("Cannot send request"); + return 1; + } + + new_json_obj(json); + if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) { + fprintf(stderr, "Dump terminated\n"); + return 1; + } + delete_json_obj(); + + return 0; +} + +int do_qdisc(int argc, char **argv) +{ + if (argc < 1) + return tc_qdisc_list(0, NULL); + if (matches(*argv, "add") == 0) + return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); + if (matches(*argv, "change") == 0) + return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1); + if (matches(*argv, "replace") == 0) + return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); + if (matches(*argv, "link") == 0) + return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1); + if (matches(*argv, "delete") == 0) + return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1); + if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 + || matches(*argv, "lst") == 0) + return tc_qdisc_list(argc-1, argv+1); + if (matches(*argv, "help") == 0) { + usage(); + return 0; + } + fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv); + return -1; +} + +struct tc_qdisc_block_exists_ctx { + __u32 block_index; + bool found; +}; + +static int tc_qdisc_block_exists_cb(struct nlmsghdr *n, void *arg) +{ + struct tc_qdisc_block_exists_ctx *ctx = arg; + struct tcmsg *t = NLMSG_DATA(n); + struct rtattr *tb[TCA_MAX+1]; + int len = n->nlmsg_len; + struct qdisc_util *q; + const char *kind; + int err; + + if (n->nlmsg_type != RTM_NEWQDISC) + return 0; + + len -= NLMSG_LENGTH(sizeof(*t)); + if (len < 0) + return -1; + + parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED); + + if (tb[TCA_KIND] == NULL) + return -1; + + if (tb[TCA_INGRESS_BLOCK] && + RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) { + __u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]); + + if (block == ctx->block_index) + ctx->found = true; + } + + if (tb[TCA_EGRESS_BLOCK] && + RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) { + __u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]); + + if (block == ctx->block_index) + ctx->found = true; + } + + kind = rta_getattr_str(tb[TCA_KIND]); + q = get_qdisc_kind(kind); + if (!q) + return -1; + if (q->has_block) { + bool found = false; + + err = q->has_block(q, tb[TCA_OPTIONS], ctx->block_index, &found); + if (err) + return err; + if (found) + ctx->found = true; + } + + return 0; +} + +bool tc_qdisc_block_exists(__u32 block_index) +{ + struct tc_qdisc_block_exists_ctx ctx = { .block_index = block_index }; + struct tcmsg t = { .tcm_family = AF_UNSPEC }; + + if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { + perror("Cannot send dump request"); + return false; + } + + if (rtnl_dump_filter(&rth, tc_qdisc_block_exists_cb, &ctx) < 0) { + perror("Dump terminated\n"); + return false; + } + + return ctx.found; +} |