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-rw-r--r--tc/tc_qdisc.c544
1 files changed, 544 insertions, 0 deletions
diff --git a/tc/tc_qdisc.c b/tc/tc_qdisc.c
new file mode 100644
index 0000000..84fd659
--- /dev/null
+++ b/tc/tc_qdisc.c
@@ -0,0 +1,544 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * tc_qdisc.c "tc qdisc".
+ *
+ * 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 | 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);
+ 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();
+ }
+ }
+
+ print_ext_msg(tb);
+ 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");
+ delete_json_obj();
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 12:46:16 +0000