| /* |
| * 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(fp, " ", 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; |
| } |