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00019 #include <netlink-local.h>
00020 #include <netlink-tc.h>
00021 #include <netlink/netlink.h>
00022 #include <netlink/utils.h>
00023 #include <netlink/route/rtnl.h>
00024 #include <netlink/route/link.h>
00025 #include <netlink/route/tc.h>
00026
00027
00028
00029 static struct nla_policy tc_policy[TCA_MAX+1] = {
00030 [TCA_KIND] = { .type = NLA_STRING,
00031 .maxlen = TCKINDSIZ },
00032 [TCA_STATS] = { .minlen = sizeof(struct tc_stats) },
00033 [TCA_STATS2] = { .type = NLA_NESTED },
00034 };
00035
00036 int tca_parse(struct nlattr **tb, int maxattr, struct rtnl_tca *g,
00037 struct nla_policy *policy)
00038 {
00039
00040 if (g->ce_mask & TCA_ATTR_OPTS)
00041 return nla_parse(tb, maxattr,
00042 (struct nlattr *) g->tc_opts->d_data,
00043 g->tc_opts->d_size, policy);
00044 else {
00045
00046
00047 memset(tb, 0, sizeof(struct nlattr *) * (maxattr + 1));
00048 return 0;
00049 }
00050 }
00051
00052 static struct nla_policy tc_stats2_policy[TCA_STATS_MAX+1] = {
00053 [TCA_STATS_BASIC] = { .minlen = sizeof(struct gnet_stats_basic) },
00054 [TCA_STATS_RATE_EST] = { .minlen = sizeof(struct gnet_stats_rate_est) },
00055 [TCA_STATS_QUEUE] = { .minlen = sizeof(struct gnet_stats_queue) },
00056 };
00057
00058 int tca_msg_parser(struct nlmsghdr *n, struct rtnl_tca *g)
00059 {
00060 struct nlattr *tb[TCA_MAX + 1];
00061 struct tcmsg *tm;
00062 int err;
00063
00064 err = nlmsg_parse(n, sizeof(*tm), tb, TCA_MAX, tc_policy);
00065 if (err < 0)
00066 return err;
00067
00068 if (tb[TCA_KIND] == NULL)
00069 return -NLE_MISSING_ATTR;
00070
00071 nla_strlcpy(g->tc_kind, tb[TCA_KIND], TCKINDSIZ);
00072
00073 tm = nlmsg_data(n);
00074 g->tc_family = tm->tcm_family;
00075 g->tc_ifindex = tm->tcm_ifindex;
00076 g->tc_handle = tm->tcm_handle;
00077 g->tc_parent = tm->tcm_parent;
00078 g->tc_info = tm->tcm_info;
00079
00080 g->ce_mask = (TCA_ATTR_FAMILY | TCA_ATTR_IFINDEX | TCA_ATTR_HANDLE |
00081 TCA_ATTR_PARENT | TCA_ATTR_INFO | TCA_ATTR_KIND);
00082
00083 if (tb[TCA_OPTIONS]) {
00084 g->tc_opts = nl_data_alloc_attr(tb[TCA_OPTIONS]);
00085 if (!g->tc_opts)
00086 return -NLE_NOMEM;
00087 g->ce_mask |= TCA_ATTR_OPTS;
00088 }
00089
00090
00091 if (tb[TCA_STATS2]) {
00092 struct nlattr *tbs[TCA_STATS_MAX + 1];
00093
00094 err = nla_parse_nested(tbs, TCA_STATS_MAX, tb[TCA_STATS2],
00095 tc_stats2_policy);
00096 if (err < 0)
00097 return err;
00098
00099 if (tbs[TCA_STATS_BASIC]) {
00100 struct gnet_stats_basic *bs;
00101
00102 bs = nla_data(tbs[TCA_STATS_BASIC]);
00103 g->tc_stats[RTNL_TC_BYTES] = bs->bytes;
00104 g->tc_stats[RTNL_TC_PACKETS] = bs->packets;
00105 }
00106
00107 if (tbs[TCA_STATS_RATE_EST]) {
00108 struct gnet_stats_rate_est *re;
00109
00110 re = nla_data(tbs[TCA_STATS_RATE_EST]);
00111 g->tc_stats[RTNL_TC_RATE_BPS] = re->bps;
00112 g->tc_stats[RTNL_TC_RATE_PPS] = re->pps;
00113 }
00114
00115 if (tbs[TCA_STATS_QUEUE]) {
00116 struct gnet_stats_queue *q;
00117
00118 q = nla_data(tbs[TCA_STATS_QUEUE]);
00119 g->tc_stats[RTNL_TC_QLEN] = q->qlen;
00120 g->tc_stats[RTNL_TC_BACKLOG] = q->backlog;
00121 g->tc_stats[RTNL_TC_DROPS] = q->drops;
00122 g->tc_stats[RTNL_TC_REQUEUES] = q->requeues;
00123 g->tc_stats[RTNL_TC_OVERLIMITS] = q->overlimits;
00124 }
00125
00126 g->ce_mask |= TCA_ATTR_STATS;
00127
00128 if (tbs[TCA_STATS_APP]) {
00129 g->tc_xstats = nl_data_alloc_attr(tbs[TCA_STATS_APP]);
00130 if (g->tc_xstats == NULL)
00131 return -NLE_NOMEM;
00132 } else
00133 goto compat_xstats;
00134 } else {
00135 if (tb[TCA_STATS]) {
00136 struct tc_stats *st = nla_data(tb[TCA_STATS]);
00137
00138 g->tc_stats[RTNL_TC_BYTES] = st->bytes;
00139 g->tc_stats[RTNL_TC_PACKETS] = st->packets;
00140 g->tc_stats[RTNL_TC_RATE_BPS] = st->bps;
00141 g->tc_stats[RTNL_TC_RATE_PPS] = st->pps;
00142 g->tc_stats[RTNL_TC_QLEN] = st->qlen;
00143 g->tc_stats[RTNL_TC_BACKLOG] = st->backlog;
00144 g->tc_stats[RTNL_TC_DROPS] = st->drops;
00145 g->tc_stats[RTNL_TC_OVERLIMITS] = st->overlimits;
00146
00147 g->ce_mask |= TCA_ATTR_STATS;
00148 }
00149
00150 compat_xstats:
00151 if (tb[TCA_XSTATS]) {
00152 g->tc_xstats = nl_data_alloc_attr(tb[TCA_XSTATS]);
00153 if (g->tc_xstats == NULL)
00154 return -NLE_NOMEM;
00155 g->ce_mask |= TCA_ATTR_XSTATS;
00156 }
00157 }
00158
00159
00160 return 0;
00161 }
00162
00163 void tca_free_data(struct rtnl_tca *tca)
00164 {
00165 nl_data_free(tca->tc_opts);
00166 nl_data_free(tca->tc_xstats);
00167 }
00168
00169 int tca_clone(struct rtnl_tca *dst, struct rtnl_tca *src)
00170 {
00171 if (src->tc_opts) {
00172 dst->tc_opts = nl_data_clone(src->tc_opts);
00173 if (!dst->tc_opts)
00174 return -NLE_NOMEM;
00175 }
00176
00177 if (src->tc_xstats) {
00178 dst->tc_xstats = nl_data_clone(src->tc_xstats);
00179 if (!dst->tc_xstats)
00180 return -NLE_NOMEM;
00181 }
00182
00183 return 0;
00184 }
00185
00186 void tca_dump_line(struct rtnl_tca *g, const char *type,
00187 struct nl_dump_params *p)
00188 {
00189 char handle[32], parent[32];
00190 struct nl_cache *link_cache;
00191
00192 link_cache = nl_cache_mngt_require("route/link");
00193
00194 nl_dump_line(p, "%s %s ", g->tc_kind, type);
00195
00196 if (link_cache) {
00197 char buf[32];
00198 nl_dump(p, "dev %s ",
00199 rtnl_link_i2name(link_cache, g->tc_ifindex,
00200 buf, sizeof(buf)));
00201 } else
00202 nl_dump(p, "dev %u ", g->tc_ifindex);
00203
00204 nl_dump(p, "handle %s parent %s",
00205 rtnl_tc_handle2str(g->tc_handle, handle, sizeof(handle)),
00206 rtnl_tc_handle2str(g->tc_parent, parent, sizeof(parent)));
00207 }
00208
00209 void tca_dump_details(struct rtnl_tca *g, struct nl_dump_params *p)
00210 {
00211 nl_dump_line(p, " ");
00212 }
00213
00214 void tca_dump_stats(struct rtnl_tca *g, struct nl_dump_params *p)
00215 {
00216 char *unit, fmt[64];
00217 float res;
00218 strcpy(fmt, " %7.2f %s %10u %10u %10u %10u %10u\n");
00219
00220 nl_dump_line(p,
00221 " Stats: bytes packets drops overlimits" \
00222 " qlen backlog\n");
00223
00224 res = nl_cancel_down_bytes(g->tc_stats[RTNL_TC_BYTES], &unit);
00225 if (*unit == 'B')
00226 fmt[11] = '9';
00227
00228 nl_dump_line(p, fmt, res, unit,
00229 g->tc_stats[RTNL_TC_PACKETS],
00230 g->tc_stats[RTNL_TC_DROPS],
00231 g->tc_stats[RTNL_TC_OVERLIMITS],
00232 g->tc_stats[RTNL_TC_QLEN],
00233 g->tc_stats[RTNL_TC_BACKLOG]);
00234
00235 res = nl_cancel_down_bytes(g->tc_stats[RTNL_TC_RATE_BPS], &unit);
00236
00237 strcpy(fmt, " %7.2f %s/s%9u pps");
00238
00239 if (*unit == 'B')
00240 fmt[11] = '9';
00241
00242 nl_dump_line(p, fmt, res, unit, g->tc_stats[RTNL_TC_RATE_PPS]);
00243 }
00244
00245 int tca_compare(struct nl_object *_a, struct nl_object *_b,
00246 uint32_t attrs, int flags)
00247 {
00248 struct rtnl_tca *a = (struct rtnl_tca *) _a;
00249 struct rtnl_tca *b = (struct rtnl_tca *) _b;
00250 int diff = 0;
00251
00252 #define TC_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, TCA_ATTR_##ATTR, a, b, EXPR)
00253
00254 diff |= TC_DIFF(HANDLE, a->tc_handle != b->tc_handle);
00255 diff |= TC_DIFF(PARENT, a->tc_parent != b->tc_parent);
00256 diff |= TC_DIFF(IFINDEX, a->tc_ifindex != b->tc_ifindex);
00257 diff |= TC_DIFF(KIND, strcmp(a->tc_kind, b->tc_kind));
00258
00259 #undef TC_DIFF
00260
00261 return diff;
00262 }
00263
00264 void tca_set_ifindex(struct rtnl_tca *t, int ifindex)
00265 {
00266 t->tc_ifindex = ifindex;
00267 t->ce_mask |= TCA_ATTR_IFINDEX;
00268 }
00269
00270 int tca_get_ifindex(struct rtnl_tca *t)
00271 {
00272 return t->tc_ifindex;
00273 }
00274
00275 void tca_set_handle(struct rtnl_tca *t, uint32_t handle)
00276 {
00277 t->tc_handle = handle;
00278 t->ce_mask |= TCA_ATTR_HANDLE;
00279 }
00280
00281 uint32_t tca_get_handle(struct rtnl_tca *t)
00282 {
00283 if (t->ce_mask & TCA_ATTR_HANDLE)
00284 return t->tc_handle;
00285 else
00286 return 0;
00287 }
00288
00289 void tca_set_parent(struct rtnl_tca *t, uint32_t parent)
00290 {
00291 t->tc_parent = parent;
00292 t->ce_mask |= TCA_ATTR_PARENT;
00293 }
00294
00295 uint32_t tca_get_parent(struct rtnl_tca *t)
00296 {
00297 if (t->ce_mask & TCA_ATTR_PARENT)
00298 return t->tc_parent;
00299 else
00300 return 0;
00301 }
00302
00303 void tca_set_kind(struct rtnl_tca *t, const char *kind)
00304 {
00305 strncpy(t->tc_kind, kind, sizeof(t->tc_kind) - 1);
00306 t->ce_mask |= TCA_ATTR_KIND;
00307 }
00308
00309 char *tca_get_kind(struct rtnl_tca *t)
00310 {
00311 if (t->ce_mask & TCA_ATTR_KIND)
00312 return t->tc_kind;
00313 else
00314 return NULL;
00315 }
00316
00317 uint64_t tca_get_stat(struct rtnl_tca *t, int id)
00318 {
00319 if (id < 0 || id > RTNL_TC_STATS_MAX)
00320 return 0;
00321
00322 return t->tc_stats[id];
00323 }
00324
00325 int tca_build_msg(struct rtnl_tca *tca, int type, int flags,
00326 struct nl_msg **result)
00327 {
00328 struct nl_msg *msg;
00329 struct tcmsg tchdr = {
00330 .tcm_family = AF_UNSPEC,
00331 .tcm_ifindex = tca->tc_ifindex,
00332 .tcm_handle = tca->tc_handle,
00333 .tcm_parent = tca->tc_parent,
00334 };
00335
00336 msg = nlmsg_alloc_simple(type, flags);
00337 if (!msg)
00338 return -NLE_NOMEM;
00339
00340 if (nlmsg_append(msg, &tchdr, sizeof(tchdr), NLMSG_ALIGNTO) < 0)
00341 goto nla_put_failure;
00342
00343 if (tca->ce_mask & TCA_ATTR_KIND)
00344 NLA_PUT_STRING(msg, TCA_KIND, tca->tc_kind);
00345
00346 *result = msg;
00347 return 0;
00348
00349 nla_put_failure:
00350 nlmsg_free(msg);
00351 return -NLE_MSGSIZE;
00352 }
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00374
00375 int rtnl_tc_calc_txtime(int bufsize, int rate)
00376 {
00377 double tx_time_secs;
00378
00379 tx_time_secs = (double) bufsize / (double) rate;
00380
00381 return tx_time_secs * 1000000.;
00382 }
00383
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00397
00398 int rtnl_tc_calc_bufsize(int txtime, int rate)
00399 {
00400 double bufsize;
00401
00402 bufsize = (double) txtime * (double) rate;
00403
00404 return bufsize / 1000000.;
00405 }
00406
00407
00408
00409
00410
00411
00412 int rtnl_tc_calc_cell_log(int cell_size)
00413 {
00414 int i;
00415
00416 for (i = 0; i < 32; i++)
00417 if ((1 << i) == cell_size)
00418 return i;
00419
00420 return -NLE_INVAL;
00421 }
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00445
00446 int rtnl_tc_build_rate_table(uint32_t *dst, uint8_t mpu, uint8_t overhead,
00447 int cell, int rate)
00448 {
00449 int i, size, cell_log;
00450
00451 cell_log = rtnl_tc_calc_cell_log(cell);
00452 if (cell_log < 0)
00453 return cell_log;
00454
00455 for (i = 0; i < RTNL_TC_RTABLE_SIZE; i++) {
00456 size = (i << cell_log) + overhead;
00457 if (size < mpu)
00458 size = mpu;
00459
00460 dst[i] = rtnl_tc_calc_txtime(size, rate);
00461 }
00462
00463 return 0;
00464 }
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00484
00485 char * rtnl_tc_handle2str(uint32_t handle, char *buf, size_t len)
00486 {
00487 if (TC_H_ROOT == handle)
00488 snprintf(buf, len, "root");
00489 else if (TC_H_UNSPEC == handle)
00490 snprintf(buf, len, "none");
00491 else if (0 == TC_H_MAJ(handle))
00492 snprintf(buf, len, ":%02x", TC_H_MIN(handle));
00493 else if (0 == TC_H_MIN(handle))
00494 snprintf(buf, len, "%02x:", TC_H_MAJ(handle) >> 16);
00495 else
00496 snprintf(buf, len, "%02x:%02x",
00497 TC_H_MAJ(handle) >> 16, TC_H_MIN(handle));
00498
00499 return buf;
00500 }
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00520 int rtnl_tc_str2handle(const char *name, uint32_t *res)
00521 {
00522 char *colon, *end;
00523 uint32_t h;
00524
00525 if (!strcasecmp(name, "root")) {
00526 *res = TC_H_ROOT;
00527 return 0;
00528 }
00529
00530 if (!strcasecmp(name, "none")) {
00531 *res = TC_H_UNSPEC;
00532 return 0;
00533 }
00534
00535 h = strtoul(name, &colon, 16);
00536
00537 if (colon == name) {
00538
00539 h = 0;
00540 if (':' != *colon)
00541 return -NLE_INVAL;
00542 }
00543
00544 if (':' == *colon) {
00545
00546 if (TC_H_MAJ(h))
00547 return -NLE_RANGE;
00548 h <<= 16;
00549
00550 if ('\0' == colon[1]) {
00551
00552 *res = h;
00553 } else {
00554
00555 uint32_t l = strtoul(colon+1, &end, 16);
00556
00557
00558 if (TC_H_MAJ(l))
00559 return -NLE_RANGE;
00560
00561 if ('\0' != *end)
00562 return -NLE_INVAL;
00563
00564 *res = (h | l);
00565 }
00566 } else if ('\0' == *colon) {
00567
00568 *res = h;
00569 } else
00570 return -NLE_INVAL;
00571
00572 return 0;
00573 }
00574
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00577