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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->tc_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 nl_error(EINVAL, "Missing tca kind TLV");
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->tc_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 = nla_get_data(tb[TCA_OPTIONS]);
00085 if (!g->tc_opts)
00086 return nl_errno(ENOMEM);
00087 g->tc_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->tc_mask |= TCA_ATTR_STATS;
00127
00128 if (tbs[TCA_STATS_APP]) {
00129 g->tc_xstats = nla_get_data(tbs[TCA_STATS_APP]);
00130 if (g->tc_xstats == NULL)
00131 return -ENOMEM;
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->tc_mask |= TCA_ATTR_STATS;
00148 }
00149
00150 compat_xstats:
00151 if (tb[TCA_XSTATS]) {
00152 g->tc_xstats = nla_get_data(tb[TCA_XSTATS]);
00153 if (g->tc_xstats == NULL)
00154 return -ENOMEM;
00155 g->tc_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_dump_brief(struct rtnl_tca *g, const char *type,
00170 struct nl_dump_params *p, int line)
00171 {
00172 char handle[32], parent[32];
00173 struct nl_cache *link_cache;
00174
00175 link_cache = nl_cache_mngt_require("route/link");
00176
00177 dp_dump(p, "%s %s ", g->tc_kind, type);
00178
00179 if (link_cache) {
00180 char buf[32];
00181 dp_dump(p, "dev %s ",
00182 rtnl_link_i2name(link_cache, g->tc_ifindex,
00183 buf, sizeof(buf)));
00184 } else
00185 dp_dump(p, "dev %u ", g->tc_ifindex);
00186
00187 dp_dump(p, "handle %s parent %s",
00188 rtnl_tc_handle2str(g->tc_handle, handle, sizeof(handle)),
00189 rtnl_tc_handle2str(g->tc_parent, parent, sizeof(parent)));
00190
00191 return 1;
00192 }
00193
00194 int tca_dump_full(struct rtnl_tca *g, struct nl_dump_params *p, int line)
00195 {
00196 dp_dump_line(p, line++, " ");
00197 return line;
00198 }
00199
00200 int tca_dump_stats(struct rtnl_tca *g, struct nl_dump_params *p, int line)
00201 {
00202 char *unit, fmt[64];
00203 float res;
00204 strcpy(fmt, " %7.2f %s %10u %10u %10u %10u %10u\n");
00205
00206 dp_dump_line(p, line++,
00207 " Stats: bytes packets drops overlimits" \
00208 " qlen backlog\n");
00209
00210 res = nl_cancel_down_bytes(g->tc_stats[RTNL_TC_BYTES], &unit);
00211 if (*unit == 'B')
00212 fmt[11] = '9';
00213
00214 dp_dump_line(p, line++, fmt, res, unit,
00215 g->tc_stats[RTNL_TC_PACKETS],
00216 g->tc_stats[RTNL_TC_DROPS],
00217 g->tc_stats[RTNL_TC_OVERLIMITS],
00218 g->tc_stats[RTNL_TC_QLEN],
00219 g->tc_stats[RTNL_TC_BACKLOG]);
00220
00221 res = nl_cancel_down_bytes(g->tc_stats[RTNL_TC_RATE_BPS], &unit);
00222
00223 strcpy(fmt, " %7.2f %s/s%9u pps");
00224
00225 if (*unit == 'B')
00226 fmt[11] = '9';
00227
00228 dp_dump_line(p, line++, fmt, res, unit, g->tc_stats[RTNL_TC_RATE_PPS]);
00229
00230 return line;
00231 }
00232
00233 int tca_filter(struct rtnl_tca *o, struct rtnl_tca *f)
00234 {
00235 #define REQ(F) (f->tc_mask & TCA_ATTR_##F)
00236 #define AVAIL(F) (o->tc_mask & TCA_ATTR_##F)
00237 #define _O(F, EXPR) (REQ(F) && (!AVAIL(F) || (EXPR)))
00238 #define _C(F, N) (REQ(F) && (!AVAIL(F) || (o->N != f->N)))
00239 if (_C(HANDLE, tc_handle) ||
00240 _C(PARENT, tc_parent) ||
00241 _C(IFINDEX, tc_ifindex) ||
00242 _O(KIND, strcmp(o->tc_kind, f->tc_kind)))
00243 return 0;
00244 #undef REQ
00245 #undef AVAIL
00246 #undef _O
00247 #undef _C
00248
00249 return 1;
00250 }
00251
00252 void tca_set_ifindex(struct rtnl_tca *t, int ifindex)
00253 {
00254 t->tc_ifindex = ifindex;
00255 t->tc_mask |= TCA_ATTR_IFINDEX;
00256 }
00257
00258 int tca_get_ifindex(struct rtnl_tca *t)
00259 {
00260 if (t->tc_mask & TCA_ATTR_IFINDEX)
00261 return t->tc_ifindex;
00262 else
00263 return RTNL_LINK_NOT_FOUND;
00264 }
00265
00266 void tca_set_handle(struct rtnl_tca *t, uint32_t handle)
00267 {
00268 t->tc_handle = handle;
00269 t->tc_mask |= TCA_ATTR_HANDLE;
00270 }
00271
00272 uint32_t tca_get_handle(struct rtnl_tca *t)
00273 {
00274 if (t->tc_mask & TCA_ATTR_HANDLE)
00275 return t->tc_handle;
00276 else
00277 return 0;
00278 }
00279
00280 void tca_set_parent(struct rtnl_tca *t, uint32_t parent)
00281 {
00282 t->tc_parent = parent;
00283 t->tc_mask |= TCA_ATTR_PARENT;
00284 }
00285
00286 uint32_t tca_get_parent(struct rtnl_tca *t)
00287 {
00288 if (t->tc_mask & TCA_ATTR_PARENT)
00289 return t->tc_parent;
00290 else
00291 return 0;
00292 }
00293
00294 void tca_set_kind(struct rtnl_tca *t, const char *kind)
00295 {
00296 strncpy(t->tc_kind, kind, sizeof(t->tc_kind) - 1);
00297 t->tc_mask |= TCA_ATTR_KIND;
00298 }
00299
00300 char *tca_get_kind(struct rtnl_tca *t)
00301 {
00302 if (t->tc_mask & TCA_ATTR_KIND)
00303 return t->tc_kind;
00304 else
00305 return NULL;
00306 }
00307
00308 uint64_t tca_get_stat(struct rtnl_tca *t, int id)
00309 {
00310 if (id < 0 || id > RTNL_TC_STATS_MAX)
00311 return 0;
00312
00313 return t->tc_stats[id];
00314 }
00315
00316 struct nl_msg *tca_build_msg(struct rtnl_tca *tca, int type, int flags)
00317 {
00318 struct nl_msg *msg;
00319 struct tcmsg tchdr = {
00320 .tcm_family = AF_UNSPEC,
00321 .tcm_ifindex = tca->tc_ifindex,
00322 .tcm_handle = tca->tc_handle,
00323 .tcm_parent = tca->tc_parent,
00324 };
00325
00326 msg = nlmsg_build_simple(type, flags);
00327 if (!msg)
00328 goto nla_put_failure;
00329
00330 if (nlmsg_append(msg, &tchdr, sizeof(tchdr), 1) < 0)
00331 goto nla_put_failure;
00332
00333 if (tca->tc_mask & TCA_ATTR_KIND)
00334 NLA_PUT_STRING(msg, TCA_KIND, tca->tc_kind);
00335
00336 return msg;
00337
00338 nla_put_failure:
00339 nlmsg_free(msg);
00340 return NULL;
00341 }
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00364 int rtnl_tc_calc_txtime(int bufsize, int rate)
00365 {
00366 double tx_time_secs;
00367
00368 tx_time_secs = (double) bufsize / (double) rate;
00369
00370 return tx_time_secs * 1000000.;
00371 }
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00386
00387 int rtnl_tc_calc_bufsize(int txtime, int rate)
00388 {
00389 double bufsize;
00390
00391 bufsize = (double) txtime * (double) rate;
00392
00393 return bufsize / 1000000.;
00394 }
00395
00396
00397
00398
00399
00400
00401 int rtnl_tc_calc_cell_log(int cell_size)
00402 {
00403 int i;
00404
00405 for (i = 0; i < 32; i++)
00406 if ((1 << i) == cell_size)
00407 return i;
00408
00409 return nl_errno(EINVAL);
00410 }
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00435 int rtnl_tc_build_rate_table(uint32_t *dst, uint8_t mpu, uint8_t overhead,
00436 int cell, int rate)
00437 {
00438 int i, size, cell_log;
00439
00440 cell_log = rtnl_tc_calc_cell_log(cell);
00441 if (cell_log < 0)
00442 return cell_log;
00443
00444 for (i = 0; i < RTNL_TC_RTABLE_SIZE; i++) {
00445 size = (i << cell_log) + overhead;
00446 if (size < mpu)
00447 size = mpu;
00448
00449 dst[i] = rtnl_tc_calc_txtime(size, rate);
00450 }
00451
00452 return 0;
00453 }
00454
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00473
00474 char * rtnl_tc_handle2str(uint32_t handle, char *buf, size_t len)
00475 {
00476 if (TC_H_ROOT == handle)
00477 snprintf(buf, len, "root");
00478 else if (TC_H_UNSPEC == handle)
00479 snprintf(buf, len, "none");
00480 else if (0 == TC_H_MAJ(handle))
00481 snprintf(buf, len, ":%02x", TC_H_MIN(handle));
00482 else if (0 == TC_H_MIN(handle))
00483 snprintf(buf, len, "%02x:", TC_H_MAJ(handle) >> 16);
00484 else
00485 snprintf(buf, len, "%02x:%02x",
00486 TC_H_MAJ(handle) >> 16, TC_H_MIN(handle));
00487
00488 return buf;
00489 }
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00509 int rtnl_tc_str2handle(const char *name, uint32_t *res)
00510 {
00511 char *colon, *end;
00512 uint32_t h;
00513
00514 if (!strcasecmp(name, "root")) {
00515 *res = TC_H_ROOT;
00516 return 0;
00517 }
00518
00519 if (!strcasecmp(name, "none")) {
00520 *res = TC_H_UNSPEC;
00521 return 0;
00522 }
00523
00524 h = strtoul(name, &colon, 16);
00525
00526 if (colon == name) {
00527
00528 h = 0;
00529 if (':' != *colon)
00530 return -EINVAL;
00531 }
00532
00533 if (':' == *colon) {
00534
00535 if (TC_H_MAJ(h))
00536 return -ERANGE;
00537 h <<= 16;
00538
00539 if ('\0' == colon[1]) {
00540
00541 *res = h;
00542 } else {
00543
00544 uint32_t l = strtoul(colon+1, &end, 16);
00545
00546
00547 if (TC_H_MAJ(l))
00548 return -ERANGE;
00549
00550 if ('\0' != *end)
00551 return -EINVAL;
00552
00553 *res = (h | l);
00554 }
00555 } else if ('\0' == *colon) {
00556
00557 *res = h;
00558 } else
00559 return -EINVAL;
00560
00561 return 0;
00562 }
00563
00564
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00566