libnl 1.1
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00001 /* 00002 * lib/route/link.c Links (Interfaces) 00003 * 00004 * This library is free software; you can redistribute it and/or 00005 * modify it under the terms of the GNU Lesser General Public 00006 * License as published by the Free Software Foundation version 2.1 00007 * of the License. 00008 * 00009 * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch> 00010 */ 00011 00012 /** 00013 * @ingroup rtnl 00014 * @defgroup link Links (Interfaces) 00015 * @brief 00016 * 00017 * @par Link Identification 00018 * A link can be identified by either its interface index or by its 00019 * name. The kernel favours the interface index but falls back to the 00020 * interface name if the interface index is lesser-than 0 for kernels 00021 * >= 2.6.11. Therefore you can request changes without mapping a 00022 * interface name to the corresponding index first. 00023 * 00024 * @par Changeable Attributes 00025 * @anchor link_changeable 00026 * - Link layer address 00027 * - Link layer broadcast address 00028 * - device mapping (ifmap) (>= 2.6.9) 00029 * - MTU (>= 2.6.9) 00030 * - Transmission queue length (>= 2.6.9) 00031 * - Weight (>= 2.6.9) 00032 * - Link name (only via access through interface index) (>= 2.6.9) 00033 * - Flags (>= 2.6.9) 00034 * - IFF_DEBUG 00035 * - IFF_NOTRAILERS 00036 * - IFF_NOARP 00037 * - IFF_DYNAMIC 00038 * - IFF_MULTICAST 00039 * - IFF_PORTSEL 00040 * - IFF_AUTOMEDIA 00041 * - IFF_UP 00042 * - IFF_PROMISC 00043 * - IFF_ALLMULTI 00044 * 00045 * @par Link Flags (linux/if.h) 00046 * @anchor link_flags 00047 * @code 00048 * IFF_UP Status of link (up|down) 00049 * IFF_BROADCAST Indicates this link allows broadcasting 00050 * IFF_MULTICAST Indicates this link allows multicasting 00051 * IFF_ALLMULTI Indicates this link is doing multicast routing 00052 * IFF_DEBUG Tell the driver to do debugging (currently unused) 00053 * IFF_LOOPBACK This is the loopback link 00054 * IFF_POINTOPOINT Point-to-point link 00055 * IFF_NOARP Link is unable to perform ARP 00056 * IFF_PROMISC Status of promiscious mode flag 00057 * IFF_MASTER Used by teql 00058 * IFF_SLAVE Used by teql 00059 * IFF_PORTSEL Indicates this link allows port selection 00060 * IFF_AUTOMEDIA Indicates this link selects port automatically 00061 * IFF_DYNAMIC Indicates the address of this link is dynamic 00062 * IFF_RUNNING Link is running and carrier is ok. 00063 * IFF_NOTRAILERS Unused, BSD compat. 00064 * @endcode 00065 * 00066 * @par Notes on IFF_PROMISC and IFF_ALLMULTI flags 00067 * Although you can query the status of IFF_PROMISC and IFF_ALLMULTI 00068 * they do not represent the actual state in the kernel but rather 00069 * whether the flag has been enabled/disabled by userspace. The link 00070 * may be in promiscious mode even if IFF_PROMISC is not set in a link 00071 * dump request response because promiscity might be needed by the driver 00072 * for a period of time. 00073 * 00074 * @note The unit of the transmission queue length depends on the 00075 * link type, a common unit is \a packets. 00076 * 00077 * @par 1) Retrieving information about available links 00078 * @code 00079 * // The first step is to retrieve a list of all available interfaces within 00080 * // the kernel and put them into a cache. 00081 * struct nl_cache *cache = rtnl_link_alloc_cache(nl_handle); 00082 * 00083 * // In a second step, a specific link may be looked up by either interface 00084 * // index or interface name. 00085 * struct rtnl_link *link = rtnl_link_get_by_name(cache, "lo"); 00086 * 00087 * // rtnl_link_get_by_name() is the short version for translating the 00088 * // interface name to an interface index first like this: 00089 * int ifindex = rtnl_link_name2i(cache, "lo"); 00090 * struct rtnl_link *link = rtnl_link_get(cache, ifindex); 00091 * 00092 * // After successful usage, the object must be given back to the cache 00093 * rtnl_link_put(link); 00094 * @endcode 00095 * 00096 * @par 2) Changing link attributes 00097 * @code 00098 * // In order to change any attributes of an existing link, we must allocate 00099 * // a new link to hold the change requests: 00100 * struct rtnl_link *request = rtnl_link_alloc(); 00101 * 00102 * // Now we can go on and specify the attributes we want to change: 00103 * rtnl_link_set_weight(request, 300); 00104 * rtnl_link_set_mtu(request, 1360); 00105 * 00106 * // We can also shut an interface down administratively 00107 * rtnl_link_unset_flags(request, rtnl_link_str2flags("up")); 00108 * 00109 * // Actually, we should know which link to change, so let's look it up 00110 * struct rtnl_link *old = rtnl_link_get(cache, "eth0"); 00111 * 00112 * // Two ways exist to commit this change request, the first one is to 00113 * // build the required netlink message and send it out in one single 00114 * // step: 00115 * rtnl_link_change(nl_handle, old, request); 00116 * 00117 * // An alternative way is to build the netlink message and send it 00118 * // out yourself using nl_send_auto_complete() 00119 * struct nl_msg *msg = rtnl_link_build_change_request(old, request); 00120 * nl_send_auto_complete(nl_handle, nlmsg_hdr(msg)); 00121 * nlmsg_free(msg); 00122 * 00123 * // Don't forget to give back the link object ;-> 00124 * rtnl_link_put(old); 00125 * @endcode 00126 * 00127 * @par 3) Link Type Specific Attributes 00128 * @code 00129 * // Some link types offer additional parameters and statistics specific 00130 * // to their type. F.e. a VLAN link can be configured like this: 00131 * // 00132 * // Allocate a new link and set the info type to "vlan". This is required 00133 * // to prepare the link to hold vlan specific attributes. 00134 * struct rtnl_link *request = rtnl_link_alloc(); 00135 * rtnl_link_set_info_type(request, "vlan"); 00136 * 00137 * // Now vlan specific attributes can be set: 00138 * rtnl_link_vlan_set_id(request, 10); 00139 * rtnl_link_vlan_set_ingress_map(request, 2, 8); 00140 * 00141 * // Of course the attributes can also be read, check the info type 00142 * // to make sure you are using the right access functions: 00143 * char *type = rtnl_link_get_info_type(link); 00144 * if (!strcmp(type, "vlan")) 00145 * int id = rtnl_link_vlan_get_id(link); 00146 * @endcode 00147 * @{ 00148 */ 00149 00150 #include <netlink-local.h> 00151 #include <netlink/netlink.h> 00152 #include <netlink/attr.h> 00153 #include <netlink/utils.h> 00154 #include <netlink/object.h> 00155 #include <netlink/route/rtnl.h> 00156 #include <netlink/route/link.h> 00157 #include <netlink/route/link/info-api.h> 00158 00159 /** @cond SKIP */ 00160 #define LINK_ATTR_MTU 0x0001 00161 #define LINK_ATTR_LINK 0x0002 00162 #define LINK_ATTR_TXQLEN 0x0004 00163 #define LINK_ATTR_WEIGHT 0x0008 00164 #define LINK_ATTR_MASTER 0x0010 00165 #define LINK_ATTR_QDISC 0x0020 00166 #define LINK_ATTR_MAP 0x0040 00167 #define LINK_ATTR_ADDR 0x0080 00168 #define LINK_ATTR_BRD 0x0100 00169 #define LINK_ATTR_FLAGS 0x0200 00170 #define LINK_ATTR_IFNAME 0x0400 00171 #define LINK_ATTR_IFINDEX 0x0800 00172 #define LINK_ATTR_FAMILY 0x1000 00173 #define LINK_ATTR_ARPTYPE 0x2000 00174 #define LINK_ATTR_STATS 0x4000 00175 #define LINK_ATTR_CHANGE 0x8000 00176 #define LINK_ATTR_OPERSTATE 0x10000 00177 #define LINK_ATTR_LINKMODE 0x20000 00178 #define LINK_ATTR_LINKINFO 0x40000 00179 00180 static struct nl_cache_ops rtnl_link_ops; 00181 static struct nl_object_ops link_obj_ops; 00182 /** @endcond */ 00183 00184 static void release_link_info(struct rtnl_link *link) 00185 { 00186 struct rtnl_link_info_ops *io = link->l_info_ops; 00187 00188 if (io != NULL) { 00189 io->io_refcnt--; 00190 io->io_free(link); 00191 link->l_info_ops = NULL; 00192 } 00193 } 00194 00195 static void link_free_data(struct nl_object *c) 00196 { 00197 struct rtnl_link *link = nl_object_priv(c); 00198 00199 if (link) { 00200 struct rtnl_link_info_ops *io; 00201 00202 if ((io = link->l_info_ops) != NULL) 00203 release_link_info(link); 00204 00205 nl_addr_put(link->l_addr); 00206 nl_addr_put(link->l_bcast); 00207 } 00208 } 00209 00210 static int link_clone(struct nl_object *_dst, struct nl_object *_src) 00211 { 00212 struct rtnl_link *dst = nl_object_priv(_dst); 00213 struct rtnl_link *src = nl_object_priv(_src); 00214 int err; 00215 00216 if (src->l_addr) 00217 if (!(dst->l_addr = nl_addr_clone(src->l_addr))) 00218 goto errout; 00219 00220 if (src->l_bcast) 00221 if (!(dst->l_bcast = nl_addr_clone(src->l_bcast))) 00222 goto errout; 00223 00224 if (src->l_info_ops && src->l_info_ops->io_clone) { 00225 err = src->l_info_ops->io_clone(dst, src); 00226 if (err < 0) 00227 goto errout; 00228 } 00229 00230 return 0; 00231 errout: 00232 return nl_get_errno(); 00233 } 00234 00235 static struct nla_policy link_policy[IFLA_MAX+1] = { 00236 [IFLA_IFNAME] = { .type = NLA_STRING, 00237 .maxlen = IFNAMSIZ }, 00238 [IFLA_MTU] = { .type = NLA_U32 }, 00239 [IFLA_TXQLEN] = { .type = NLA_U32 }, 00240 [IFLA_LINK] = { .type = NLA_U32 }, 00241 [IFLA_WEIGHT] = { .type = NLA_U32 }, 00242 [IFLA_MASTER] = { .type = NLA_U32 }, 00243 [IFLA_OPERSTATE]= { .type = NLA_U8 }, 00244 [IFLA_LINKMODE] = { .type = NLA_U8 }, 00245 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 00246 [IFLA_QDISC] = { .type = NLA_STRING, 00247 .maxlen = IFQDISCSIZ }, 00248 [IFLA_STATS] = { .minlen = sizeof(struct rtnl_link_stats) }, 00249 [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) }, 00250 }; 00251 00252 static struct nla_policy link_info_policy[IFLA_INFO_MAX+1] = { 00253 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 00254 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 00255 [IFLA_INFO_XSTATS] = { .type = NLA_NESTED }, 00256 }; 00257 00258 static int link_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who, 00259 struct nlmsghdr *n, struct nl_parser_param *pp) 00260 { 00261 struct rtnl_link *link; 00262 struct ifinfomsg *ifi; 00263 struct nlattr *tb[IFLA_MAX+1]; 00264 int err; 00265 00266 link = rtnl_link_alloc(); 00267 if (link == NULL) { 00268 err = nl_errno(ENOMEM); 00269 goto errout; 00270 } 00271 00272 link->ce_msgtype = n->nlmsg_type; 00273 00274 err = nlmsg_parse(n, sizeof(*ifi), tb, IFLA_MAX, link_policy); 00275 if (err < 0) 00276 goto errout; 00277 00278 if (tb[IFLA_IFNAME] == NULL) { 00279 err = nl_error(EINVAL, "Missing link name TLV"); 00280 goto errout; 00281 } 00282 00283 nla_strlcpy(link->l_name, tb[IFLA_IFNAME], IFNAMSIZ); 00284 00285 ifi = nlmsg_data(n); 00286 link->l_family = ifi->ifi_family; 00287 link->l_arptype = ifi->ifi_type; 00288 link->l_index = ifi->ifi_index; 00289 link->l_flags = ifi->ifi_flags; 00290 link->l_change = ifi->ifi_change; 00291 link->ce_mask = (LINK_ATTR_IFNAME | LINK_ATTR_FAMILY | 00292 LINK_ATTR_ARPTYPE| LINK_ATTR_IFINDEX | 00293 LINK_ATTR_FLAGS | LINK_ATTR_CHANGE); 00294 00295 if (tb[IFLA_STATS]) { 00296 struct rtnl_link_stats *st = nla_data(tb[IFLA_STATS]); 00297 00298 link->l_stats[RTNL_LINK_RX_PACKETS] = st->rx_packets; 00299 link->l_stats[RTNL_LINK_RX_BYTES] = st->rx_bytes; 00300 link->l_stats[RTNL_LINK_RX_ERRORS] = st->rx_errors; 00301 link->l_stats[RTNL_LINK_RX_DROPPED] = st->rx_dropped; 00302 link->l_stats[RTNL_LINK_RX_COMPRESSED] = st->rx_compressed; 00303 link->l_stats[RTNL_LINK_RX_FIFO_ERR] = st->rx_fifo_errors; 00304 link->l_stats[RTNL_LINK_TX_PACKETS] = st->tx_packets; 00305 link->l_stats[RTNL_LINK_TX_BYTES] = st->tx_bytes; 00306 link->l_stats[RTNL_LINK_TX_ERRORS] = st->tx_errors; 00307 link->l_stats[RTNL_LINK_TX_DROPPED] = st->tx_dropped; 00308 link->l_stats[RTNL_LINK_TX_COMPRESSED] = st->tx_compressed; 00309 link->l_stats[RTNL_LINK_TX_FIFO_ERR] = st->tx_fifo_errors; 00310 link->l_stats[RTNL_LINK_RX_LEN_ERR] = st->rx_length_errors; 00311 link->l_stats[RTNL_LINK_RX_OVER_ERR] = st->rx_over_errors; 00312 link->l_stats[RTNL_LINK_RX_CRC_ERR] = st->rx_crc_errors; 00313 link->l_stats[RTNL_LINK_RX_FRAME_ERR] = st->rx_frame_errors; 00314 link->l_stats[RTNL_LINK_RX_MISSED_ERR] = st->rx_missed_errors; 00315 link->l_stats[RTNL_LINK_TX_ABORT_ERR] = st->tx_aborted_errors; 00316 link->l_stats[RTNL_LINK_TX_CARRIER_ERR] = st->tx_carrier_errors; 00317 link->l_stats[RTNL_LINK_TX_HBEAT_ERR] = st->tx_heartbeat_errors; 00318 link->l_stats[RTNL_LINK_TX_WIN_ERR] = st->tx_window_errors; 00319 link->l_stats[RTNL_LINK_MULTICAST] = st->multicast; 00320 00321 link->ce_mask |= LINK_ATTR_STATS; 00322 } 00323 00324 if (tb[IFLA_TXQLEN]) { 00325 link->l_txqlen = nla_get_u32(tb[IFLA_TXQLEN]); 00326 link->ce_mask |= LINK_ATTR_TXQLEN; 00327 } 00328 00329 if (tb[IFLA_MTU]) { 00330 link->l_mtu = nla_get_u32(tb[IFLA_MTU]); 00331 link->ce_mask |= LINK_ATTR_MTU; 00332 } 00333 00334 if (tb[IFLA_ADDRESS]) { 00335 link->l_addr = nla_get_addr(tb[IFLA_ADDRESS], AF_UNSPEC); 00336 if (link->l_addr == NULL) 00337 goto errout; 00338 nl_addr_set_family(link->l_addr, 00339 nl_addr_guess_family(link->l_addr)); 00340 link->ce_mask |= LINK_ATTR_ADDR; 00341 } 00342 00343 if (tb[IFLA_BROADCAST]) { 00344 link->l_bcast = nla_get_addr(tb[IFLA_BROADCAST], AF_UNSPEC); 00345 if (link->l_bcast == NULL) 00346 goto errout; 00347 nl_addr_set_family(link->l_bcast, 00348 nl_addr_guess_family(link->l_bcast)); 00349 link->ce_mask |= LINK_ATTR_BRD; 00350 } 00351 00352 if (tb[IFLA_LINK]) { 00353 link->l_link = nla_get_u32(tb[IFLA_LINK]); 00354 link->ce_mask |= LINK_ATTR_LINK; 00355 } 00356 00357 if (tb[IFLA_WEIGHT]) { 00358 link->l_weight = nla_get_u32(tb[IFLA_WEIGHT]); 00359 link->ce_mask |= LINK_ATTR_WEIGHT; 00360 } 00361 00362 if (tb[IFLA_QDISC]) { 00363 nla_strlcpy(link->l_qdisc, tb[IFLA_QDISC], IFQDISCSIZ); 00364 link->ce_mask |= LINK_ATTR_QDISC; 00365 } 00366 00367 if (tb[IFLA_MAP]) { 00368 nla_memcpy(&link->l_map, tb[IFLA_MAP], 00369 sizeof(struct rtnl_link_ifmap)); 00370 link->ce_mask |= LINK_ATTR_MAP; 00371 } 00372 00373 if (tb[IFLA_MASTER]) { 00374 link->l_master = nla_get_u32(tb[IFLA_MASTER]); 00375 link->ce_mask |= LINK_ATTR_MASTER; 00376 } 00377 00378 if (tb[IFLA_OPERSTATE]) { 00379 link->l_operstate = nla_get_u8(tb[IFLA_OPERSTATE]); 00380 link->ce_mask |= LINK_ATTR_OPERSTATE; 00381 } 00382 00383 if (tb[IFLA_LINKMODE]) { 00384 link->l_linkmode = nla_get_u8(tb[IFLA_LINKMODE]); 00385 link->ce_mask |= LINK_ATTR_LINKMODE; 00386 } 00387 00388 if (tb[IFLA_LINKINFO]) { 00389 struct nlattr *li[IFLA_INFO_MAX+1]; 00390 00391 err = nla_parse_nested(li, IFLA_INFO_MAX, tb[IFLA_LINKINFO], 00392 link_info_policy); 00393 if (err < 0) 00394 goto errout; 00395 00396 if (li[IFLA_INFO_KIND] && 00397 (li[IFLA_INFO_DATA] || li[IFLA_INFO_XSTATS])) { 00398 struct rtnl_link_info_ops *ops; 00399 char *kind; 00400 00401 kind = nla_get_string(li[IFLA_INFO_KIND]); 00402 ops = rtnl_link_info_ops_lookup(kind); 00403 if (ops != NULL) { 00404 ops->io_refcnt++; 00405 link->l_info_ops = ops; 00406 err = ops->io_parse(link, li[IFLA_INFO_DATA], 00407 li[IFLA_INFO_XSTATS]); 00408 if (err < 0) 00409 goto errout; 00410 } else { 00411 /* XXX: Warn about unparsed info? */ 00412 } 00413 } 00414 } 00415 00416 err = pp->pp_cb((struct nl_object *) link, pp); 00417 if (err < 0) 00418 goto errout; 00419 00420 err = P_ACCEPT; 00421 00422 errout: 00423 rtnl_link_put(link); 00424 return err; 00425 } 00426 00427 static int link_request_update(struct nl_cache *c, struct nl_handle *h) 00428 { 00429 return nl_rtgen_request(h, RTM_GETLINK, AF_UNSPEC, NLM_F_DUMP); 00430 } 00431 00432 static int link_dump_brief(struct nl_object *obj, struct nl_dump_params *p) 00433 { 00434 char buf[128]; 00435 struct nl_cache *cache = dp_cache(obj); 00436 struct rtnl_link *link = (struct rtnl_link *) obj; 00437 int line = 1; 00438 00439 dp_dump(p, "%s %s ", link->l_name, 00440 nl_llproto2str(link->l_arptype, buf, sizeof(buf))); 00441 00442 if (link->l_addr && !nl_addr_iszero(link->l_addr)) 00443 dp_dump(p, "%s ", nl_addr2str(link->l_addr, buf, sizeof(buf))); 00444 00445 if (link->ce_mask & LINK_ATTR_MASTER) { 00446 struct rtnl_link *master = rtnl_link_get(cache, link->l_master); 00447 dp_dump(p, "master %s ", master ? master->l_name : "inv"); 00448 if (master) 00449 rtnl_link_put(master); 00450 } 00451 00452 rtnl_link_flags2str(link->l_flags, buf, sizeof(buf)); 00453 if (buf[0]) 00454 dp_dump(p, "<%s> ", buf); 00455 00456 if (link->ce_mask & LINK_ATTR_LINK) { 00457 struct rtnl_link *ll = rtnl_link_get(cache, link->l_link); 00458 dp_dump(p, "slave-of %s ", ll ? ll->l_name : "NONE"); 00459 if (ll) 00460 rtnl_link_put(ll); 00461 } 00462 00463 if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_BRIEF]) 00464 line = link->l_info_ops->io_dump[NL_DUMP_BRIEF](link, p, line); 00465 00466 dp_dump(p, "\n"); 00467 00468 return line; 00469 } 00470 00471 static int link_dump_full(struct nl_object *obj, struct nl_dump_params *p) 00472 { 00473 struct rtnl_link *link = (struct rtnl_link *) obj; 00474 char buf[64]; 00475 int line; 00476 00477 line = link_dump_brief(obj, p); 00478 dp_new_line(p, line++); 00479 00480 dp_dump(p, " mtu %u ", link->l_mtu); 00481 dp_dump(p, "txqlen %u weight %u ", link->l_txqlen, link->l_weight); 00482 00483 if (link->ce_mask & LINK_ATTR_QDISC) 00484 dp_dump(p, "qdisc %s ", link->l_qdisc); 00485 00486 if (link->ce_mask & LINK_ATTR_MAP && link->l_map.lm_irq) 00487 dp_dump(p, "irq %u ", link->l_map.lm_irq); 00488 00489 if (link->ce_mask & LINK_ATTR_IFINDEX) 00490 dp_dump(p, "index %u ", link->l_index); 00491 00492 00493 dp_dump(p, "\n"); 00494 dp_new_line(p, line++); 00495 00496 dp_dump(p, " "); 00497 00498 if (link->ce_mask & LINK_ATTR_BRD) 00499 dp_dump(p, "brd %s ", nl_addr2str(link->l_bcast, buf, 00500 sizeof(buf))); 00501 00502 if ((link->ce_mask & LINK_ATTR_OPERSTATE) && 00503 link->l_operstate != IF_OPER_UNKNOWN) { 00504 rtnl_link_operstate2str(link->l_operstate, buf, sizeof(buf)); 00505 dp_dump(p, "state %s ", buf); 00506 } 00507 00508 dp_dump(p, "mode %s\n", 00509 rtnl_link_mode2str(link->l_linkmode, buf, sizeof(buf))); 00510 00511 if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_FULL]) 00512 line = link->l_info_ops->io_dump[NL_DUMP_FULL](link, p, line); 00513 00514 return line; 00515 } 00516 00517 static int link_dump_stats(struct nl_object *obj, struct nl_dump_params *p) 00518 { 00519 struct rtnl_link *link = (struct rtnl_link *) obj; 00520 char *unit, fmt[64]; 00521 float res; 00522 int line; 00523 00524 line = link_dump_full(obj, p); 00525 00526 dp_dump_line(p, line++, " Stats: bytes packets errors " 00527 " dropped fifo-err compressed\n"); 00528 00529 res = nl_cancel_down_bytes(link->l_stats[RTNL_LINK_RX_BYTES], &unit); 00530 00531 strcpy(fmt, " RX %X.2f %s %10llu %10llu %10llu %10llu %10llu\n"); 00532 fmt[9] = *unit == 'B' ? '9' : '7'; 00533 00534 dp_dump_line(p, line++, fmt, 00535 res, unit, 00536 link->l_stats[RTNL_LINK_RX_PACKETS], 00537 link->l_stats[RTNL_LINK_RX_ERRORS], 00538 link->l_stats[RTNL_LINK_RX_DROPPED], 00539 link->l_stats[RTNL_LINK_RX_FIFO_ERR], 00540 link->l_stats[RTNL_LINK_RX_COMPRESSED]); 00541 00542 res = nl_cancel_down_bytes(link->l_stats[RTNL_LINK_TX_BYTES], &unit); 00543 00544 strcpy(fmt, " TX %X.2f %s %10llu %10llu %10llu %10llu %10llu\n"); 00545 fmt[9] = *unit == 'B' ? '9' : '7'; 00546 00547 dp_dump_line(p, line++, fmt, 00548 res, unit, 00549 link->l_stats[RTNL_LINK_TX_PACKETS], 00550 link->l_stats[RTNL_LINK_TX_ERRORS], 00551 link->l_stats[RTNL_LINK_TX_DROPPED], 00552 link->l_stats[RTNL_LINK_TX_FIFO_ERR], 00553 link->l_stats[RTNL_LINK_TX_COMPRESSED]); 00554 00555 dp_dump_line(p, line++, " Errors: length over crc " 00556 " frame missed multicast\n"); 00557 00558 dp_dump_line(p, line++, " RX %10" PRIu64 " %10" PRIu64 " %10" 00559 PRIu64 " %10" PRIu64 " %10" PRIu64 " %10" 00560 PRIu64 "\n", 00561 link->l_stats[RTNL_LINK_RX_LEN_ERR], 00562 link->l_stats[RTNL_LINK_RX_OVER_ERR], 00563 link->l_stats[RTNL_LINK_RX_CRC_ERR], 00564 link->l_stats[RTNL_LINK_RX_FRAME_ERR], 00565 link->l_stats[RTNL_LINK_RX_MISSED_ERR], 00566 link->l_stats[RTNL_LINK_MULTICAST]); 00567 00568 dp_dump_line(p, line++, " Errors: aborted carrier heartbeat " 00569 " window collision\n"); 00570 00571 dp_dump_line(p, line++, " TX %10" PRIu64 " %10" PRIu64 " %10" 00572 PRIu64 " %10" PRIu64 " %10" PRIu64 "\n", 00573 link->l_stats[RTNL_LINK_TX_ABORT_ERR], 00574 link->l_stats[RTNL_LINK_TX_CARRIER_ERR], 00575 link->l_stats[RTNL_LINK_TX_HBEAT_ERR], 00576 link->l_stats[RTNL_LINK_TX_WIN_ERR], 00577 link->l_stats[RTNL_LINK_TX_COLLISIONS]); 00578 00579 if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_STATS]) 00580 line = link->l_info_ops->io_dump[NL_DUMP_STATS](link, p, line); 00581 00582 return line; 00583 } 00584 00585 static int link_dump_xml(struct nl_object *obj, struct nl_dump_params *p) 00586 { 00587 struct rtnl_link *link = (struct rtnl_link *) obj; 00588 struct nl_cache *cache = dp_cache(obj); 00589 char buf[128]; 00590 int i, line = 0; 00591 00592 dp_dump_line(p, line++, "<link name=\"%s\" index=\"%u\">\n", 00593 link->l_name, link->l_index); 00594 dp_dump_line(p, line++, " <family>%s</family>\n", 00595 nl_af2str(link->l_family, buf, sizeof(buf))); 00596 dp_dump_line(p, line++, " <arptype>%s</arptype>\n", 00597 nl_llproto2str(link->l_arptype, buf, sizeof(buf))); 00598 dp_dump_line(p, line++, " <address>%s</address>\n", 00599 nl_addr2str(link->l_addr, buf, sizeof(buf))); 00600 dp_dump_line(p, line++, " <mtu>%u</mtu>\n", link->l_mtu); 00601 dp_dump_line(p, line++, " <txqlen>%u</txqlen>\n", link->l_txqlen); 00602 dp_dump_line(p, line++, " <weight>%u</weight>\n", link->l_weight); 00603 00604 rtnl_link_flags2str(link->l_flags, buf, sizeof(buf)); 00605 if (buf[0]) 00606 dp_dump_line(p, line++, " <flags>%s</flags>\n", buf); 00607 00608 if (link->ce_mask & LINK_ATTR_QDISC) 00609 dp_dump_line(p, line++, " <qdisc>%s</qdisc>\n", link->l_qdisc); 00610 00611 if (link->ce_mask & LINK_ATTR_LINK) { 00612 struct rtnl_link *ll = rtnl_link_get(cache, link->l_link); 00613 dp_dump_line(p, line++, " <link>%s</link>\n", 00614 ll ? ll->l_name : "none"); 00615 if (ll) 00616 rtnl_link_put(ll); 00617 } 00618 00619 if (link->ce_mask & LINK_ATTR_MASTER) { 00620 struct rtnl_link *master = rtnl_link_get(cache, link->l_master); 00621 dp_dump_line(p, line++, " <master>%s</master>\n", 00622 master ? master->l_name : "none"); 00623 if (master) 00624 rtnl_link_put(master); 00625 } 00626 00627 if (link->ce_mask & LINK_ATTR_BRD) 00628 dp_dump_line(p, line++, " <broadcast>%s</broadcast>\n", 00629 nl_addr2str(link->l_bcast, buf, sizeof(buf))); 00630 00631 if (link->ce_mask & LINK_ATTR_STATS) { 00632 dp_dump_line(p, line++, " <stats>\n"); 00633 for (i = 0; i <= RTNL_LINK_STATS_MAX; i++) { 00634 rtnl_link_stat2str(i, buf, sizeof(buf)); 00635 dp_dump_line(p, line++, 00636 " <%s>%" PRIu64 "</%s>\n", 00637 buf, link->l_stats[i], buf); 00638 } 00639 dp_dump_line(p, line++, " </stats>\n"); 00640 } 00641 00642 if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_XML]) { 00643 dp_dump_line(p, line++, " <info>\n"); 00644 line = link->l_info_ops->io_dump[NL_DUMP_XML](link, p, line); 00645 dp_dump_line(p, line++, " </info>\n"); 00646 } 00647 00648 dp_dump_line(p, line++, "</link>\n"); 00649 00650 #if 0 00651 uint32_t l_change; /**< Change mask */ 00652 struct rtnl_lifmap l_map; /**< Interface device mapping */ 00653 #endif 00654 00655 return line; 00656 } 00657 00658 static int link_dump_env(struct nl_object *obj, struct nl_dump_params *p) 00659 { 00660 struct rtnl_link *link = (struct rtnl_link *) obj; 00661 struct nl_cache *cache = dp_cache(obj); 00662 char buf[128]; 00663 int i, line = 0; 00664 00665 dp_dump_line(p, line++, "LINK_NAME=%s\n", link->l_name); 00666 dp_dump_line(p, line++, "LINK_IFINDEX=%u\n", link->l_index); 00667 dp_dump_line(p, line++, "LINK_FAMILY=%s\n", 00668 nl_af2str(link->l_family, buf, sizeof(buf))); 00669 dp_dump_line(p, line++, "LINK_TYPE=%s\n", 00670 nl_llproto2str(link->l_arptype, buf, sizeof(buf))); 00671 if (link->ce_mask & LINK_ATTR_ADDR) 00672 dp_dump_line(p, line++, "LINK_ADDRESS=%s\n", 00673 nl_addr2str(link->l_addr, buf, sizeof(buf))); 00674 dp_dump_line(p, line++, "LINK_MTU=%u\n", link->l_mtu); 00675 dp_dump_line(p, line++, "LINK_TXQUEUELEN=%u\n", link->l_txqlen); 00676 dp_dump_line(p, line++, "LINK_WEIGHT=%u\n", link->l_weight); 00677 00678 rtnl_link_flags2str(link->l_flags & ~IFF_RUNNING, buf, sizeof(buf)); 00679 if (buf[0]) 00680 dp_dump_line(p, line++, "LINK_FLAGS=%s\n", buf); 00681 00682 if (link->ce_mask & LINK_ATTR_QDISC) 00683 dp_dump_line(p, line++, "LINK_QDISC=%s\n", link->l_qdisc); 00684 00685 if (link->ce_mask & LINK_ATTR_LINK) { 00686 struct rtnl_link *ll = rtnl_link_get(cache, link->l_link); 00687 00688 dp_dump_line(p, line++, "LINK_LINK_IFINDEX=%d\n", link->l_link); 00689 if (ll) { 00690 dp_dump_line(p, line++, "LINK_LINK_IFNAME=%s\n", 00691 ll->l_name); 00692 rtnl_link_put(ll); 00693 } 00694 } 00695 00696 if (link->ce_mask & LINK_ATTR_MASTER) { 00697 struct rtnl_link *master = rtnl_link_get(cache, link->l_master); 00698 dp_dump_line(p, line++, "LINK_MASTER=%s\n", 00699 master ? master->l_name : "none"); 00700 if (master) 00701 rtnl_link_put(master); 00702 } 00703 00704 if (link->ce_mask & LINK_ATTR_BRD) 00705 dp_dump_line(p, line++, "LINK_BROADCAST=%s\n", 00706 nl_addr2str(link->l_bcast, buf, sizeof(buf))); 00707 00708 if (link->ce_mask & LINK_ATTR_STATS) { 00709 for (i = 0; i <= RTNL_LINK_STATS_MAX; i++) { 00710 char *c = buf; 00711 00712 sprintf(buf, "LINK_"); 00713 rtnl_link_stat2str(i, buf + 5, sizeof(buf) - 5); 00714 while (*c) { 00715 *c = toupper(*c); 00716 c++; 00717 } 00718 dp_dump_line(p, line++, 00719 "%s=%" PRIu64 "\n", buf, link->l_stats[i]); 00720 } 00721 } 00722 00723 if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_ENV]) 00724 line = link->l_info_ops->io_dump[NL_DUMP_ENV](link, p, line); 00725 00726 return line; 00727 } 00728 00729 #if 0 00730 static int link_handle_event(struct nl_object *a, struct rtnl_link_event_cb *cb) 00731 { 00732 struct rtnl_link *l = (struct rtnl_link *) a; 00733 struct nl_cache *c = dp_cache(a); 00734 int nevents = 0; 00735 00736 if (l->l_change == ~0U) { 00737 if (l->ce_msgtype == RTM_NEWLINK) 00738 cb->le_register(l); 00739 else 00740 cb->le_unregister(l); 00741 00742 return 1; 00743 } 00744 00745 if (l->l_change & IFF_SLAVE) { 00746 if (l->l_flags & IFF_SLAVE) { 00747 struct rtnl_link *m = rtnl_link_get(c, l->l_master); 00748 cb->le_new_bonding(l, m); 00749 if (m) 00750 rtnl_link_put(m); 00751 } else 00752 cb->le_cancel_bonding(l); 00753 } 00754 00755 #if 0 00756 if (l->l_change & IFF_UP && l->l_change & IFF_RUNNING) 00757 dp_dump_line(p, line++, "link %s changed state to %s.\n", 00758 l->l_name, l->l_flags & IFF_UP ? "up" : "down"); 00759 00760 if (l->l_change & IFF_PROMISC) { 00761 dp_new_line(p, line++); 00762 dp_dump(p, "link %s %s promiscuous mode.\n", 00763 l->l_name, l->l_flags & IFF_PROMISC ? "entered" : "left"); 00764 } 00765 00766 if (line == 0) 00767 dp_dump_line(p, line++, "link %s sent unknown event.\n", 00768 l->l_name); 00769 #endif 00770 00771 return nevents; 00772 } 00773 #endif 00774 00775 static int link_compare(struct nl_object *_a, struct nl_object *_b, 00776 uint32_t attrs, int flags) 00777 { 00778 struct rtnl_link *a = (struct rtnl_link *) _a; 00779 struct rtnl_link *b = (struct rtnl_link *) _b; 00780 int diff = 0; 00781 00782 #define LINK_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, LINK_ATTR_##ATTR, a, b, EXPR) 00783 00784 diff |= LINK_DIFF(IFINDEX, a->l_index != b->l_index); 00785 diff |= LINK_DIFF(MTU, a->l_mtu != b->l_mtu); 00786 diff |= LINK_DIFF(LINK, a->l_link != b->l_link); 00787 diff |= LINK_DIFF(TXQLEN, a->l_txqlen != b->l_txqlen); 00788 diff |= LINK_DIFF(WEIGHT, a->l_weight != b->l_weight); 00789 diff |= LINK_DIFF(MASTER, a->l_master != b->l_master); 00790 diff |= LINK_DIFF(FAMILY, a->l_family != b->l_family); 00791 diff |= LINK_DIFF(OPERSTATE, a->l_operstate != b->l_operstate); 00792 diff |= LINK_DIFF(LINKMODE, a->l_linkmode != b->l_linkmode); 00793 diff |= LINK_DIFF(QDISC, strcmp(a->l_qdisc, b->l_qdisc)); 00794 diff |= LINK_DIFF(IFNAME, strcmp(a->l_name, b->l_name)); 00795 diff |= LINK_DIFF(ADDR, nl_addr_cmp(a->l_addr, b->l_addr)); 00796 diff |= LINK_DIFF(BRD, nl_addr_cmp(a->l_bcast, b->l_bcast)); 00797 00798 if (flags & LOOSE_FLAG_COMPARISON) 00799 diff |= LINK_DIFF(FLAGS, 00800 (a->l_flags ^ b->l_flags) & b->l_flag_mask); 00801 else 00802 diff |= LINK_DIFF(FLAGS, a->l_flags != b->l_flags); 00803 00804 #undef LINK_DIFF 00805 00806 return diff; 00807 } 00808 00809 static struct trans_tbl link_attrs[] = { 00810 __ADD(LINK_ATTR_MTU, mtu) 00811 __ADD(LINK_ATTR_LINK, link) 00812 __ADD(LINK_ATTR_TXQLEN, txqlen) 00813 __ADD(LINK_ATTR_WEIGHT, weight) 00814 __ADD(LINK_ATTR_MASTER, master) 00815 __ADD(LINK_ATTR_QDISC, qdisc) 00816 __ADD(LINK_ATTR_MAP, map) 00817 __ADD(LINK_ATTR_ADDR, address) 00818 __ADD(LINK_ATTR_BRD, broadcast) 00819 __ADD(LINK_ATTR_FLAGS, flags) 00820 __ADD(LINK_ATTR_IFNAME, name) 00821 __ADD(LINK_ATTR_IFINDEX, ifindex) 00822 __ADD(LINK_ATTR_FAMILY, family) 00823 __ADD(LINK_ATTR_ARPTYPE, arptype) 00824 __ADD(LINK_ATTR_STATS, stats) 00825 __ADD(LINK_ATTR_CHANGE, change) 00826 __ADD(LINK_ATTR_OPERSTATE, operstate) 00827 __ADD(LINK_ATTR_LINKMODE, linkmode) 00828 }; 00829 00830 static char *link_attrs2str(int attrs, char *buf, size_t len) 00831 { 00832 return __flags2str(attrs, buf, len, link_attrs, 00833 ARRAY_SIZE(link_attrs)); 00834 } 00835 00836 /** 00837 * @name Allocation/Freeing 00838 * @{ 00839 */ 00840 00841 struct rtnl_link *rtnl_link_alloc(void) 00842 { 00843 return (struct rtnl_link *) nl_object_alloc(&link_obj_ops); 00844 } 00845 00846 void rtnl_link_put(struct rtnl_link *link) 00847 { 00848 nl_object_put((struct nl_object *) link); 00849 } 00850 00851 /** @} */ 00852 00853 /** 00854 * @name Cache Management 00855 * @{ 00856 */ 00857 00858 00859 /** 00860 * Allocate link cache and fill in all configured links. 00861 * @arg handle Netlink handle. 00862 * 00863 * Allocates a new link cache, initializes it properly and updates it 00864 * to include all links currently configured in the kernel. 00865 * 00866 * @note Free the memory after usage. 00867 * @return Newly allocated cache or NULL if an error occured. 00868 */ 00869 struct nl_cache *rtnl_link_alloc_cache(struct nl_handle *handle) 00870 { 00871 struct nl_cache * cache; 00872 00873 cache = nl_cache_alloc(&rtnl_link_ops); 00874 if (cache == NULL) 00875 return NULL; 00876 00877 if (handle && nl_cache_refill(handle, cache) < 0) { 00878 nl_cache_free(cache); 00879 return NULL; 00880 } 00881 00882 return cache; 00883 } 00884 00885 /** 00886 * Look up link by interface index in the provided cache 00887 * @arg cache link cache 00888 * @arg ifindex link interface index 00889 * 00890 * The caller owns a reference on the returned object and 00891 * must give the object back via rtnl_link_put(). 00892 * 00893 * @return pointer to link inside the cache or NULL if no match was found. 00894 */ 00895 struct rtnl_link *rtnl_link_get(struct nl_cache *cache, int ifindex) 00896 { 00897 struct rtnl_link *link; 00898 00899 if (cache->c_ops != &rtnl_link_ops) 00900 return NULL; 00901 00902 nl_list_for_each_entry(link, &cache->c_items, ce_list) { 00903 if (link->l_index == ifindex) { 00904 nl_object_get((struct nl_object *) link); 00905 return link; 00906 } 00907 } 00908 00909 return NULL; 00910 } 00911 00912 /** 00913 * Look up link by link name in the provided cache 00914 * @arg cache link cache 00915 * @arg name link name 00916 * 00917 * The caller owns a reference on the returned object and 00918 * must give the object back via rtnl_link_put(). 00919 * 00920 * @return pointer to link inside the cache or NULL if no match was found. 00921 */ 00922 struct rtnl_link *rtnl_link_get_by_name(struct nl_cache *cache, 00923 const char *name) 00924 { 00925 struct rtnl_link *link; 00926 00927 if (cache->c_ops != &rtnl_link_ops) 00928 return NULL; 00929 00930 nl_list_for_each_entry(link, &cache->c_items, ce_list) { 00931 if (!strcmp(name, link->l_name)) { 00932 nl_object_get((struct nl_object *) link); 00933 return link; 00934 } 00935 } 00936 00937 return NULL; 00938 } 00939 00940 /** @} */ 00941 00942 /** 00943 * @name Link Modifications 00944 * @{ 00945 */ 00946 00947 /** 00948 * Builds a netlink change request message to change link attributes 00949 * @arg old link to be changed 00950 * @arg tmpl template with requested changes 00951 * @arg flags additional netlink message flags 00952 * 00953 * Builds a new netlink message requesting a change of link attributes. 00954 * The netlink message header isn't fully equipped with all relevant 00955 * fields and must be sent out via nl_send_auto_complete() or 00956 * supplemented as needed. 00957 * \a old must point to a link currently configured in the kernel 00958 * and \a tmpl must contain the attributes to be changed set via 00959 * \c rtnl_link_set_* functions. 00960 * 00961 * @return New netlink message 00962 * @note Not all attributes can be changed, see 00963 * \ref link_changeable "Changeable Attributes" for more details. 00964 */ 00965 struct nl_msg * rtnl_link_build_change_request(struct rtnl_link *old, 00966 struct rtnl_link *tmpl, 00967 int flags) 00968 { 00969 struct nl_msg *msg; 00970 struct ifinfomsg ifi = { 00971 .ifi_family = old->l_family, 00972 .ifi_index = old->l_index, 00973 }; 00974 00975 if (tmpl->ce_mask & LINK_ATTR_FLAGS) { 00976 ifi.ifi_flags = old->l_flags & ~tmpl->l_flag_mask; 00977 ifi.ifi_flags |= tmpl->l_flags; 00978 } 00979 00980 msg = nlmsg_alloc_simple(RTM_SETLINK, flags); 00981 if (!msg) 00982 goto nla_put_failure; 00983 00984 if (nlmsg_append(msg, &ifi, sizeof(ifi), NLMSG_ALIGNTO) < 0) 00985 goto nla_put_failure; 00986 00987 if (tmpl->ce_mask & LINK_ATTR_ADDR) 00988 NLA_PUT_ADDR(msg, IFLA_ADDRESS, tmpl->l_addr); 00989 00990 if (tmpl->ce_mask & LINK_ATTR_BRD) 00991 NLA_PUT_ADDR(msg, IFLA_BROADCAST, tmpl->l_bcast); 00992 00993 if (tmpl->ce_mask & LINK_ATTR_MTU) 00994 NLA_PUT_U32(msg, IFLA_MTU, tmpl->l_mtu); 00995 00996 if (tmpl->ce_mask & LINK_ATTR_TXQLEN) 00997 NLA_PUT_U32(msg, IFLA_TXQLEN, tmpl->l_txqlen); 00998 00999 if (tmpl->ce_mask & LINK_ATTR_WEIGHT) 01000 NLA_PUT_U32(msg, IFLA_WEIGHT, tmpl->l_weight); 01001 01002 if (tmpl->ce_mask & LINK_ATTR_IFNAME) 01003 NLA_PUT_STRING(msg, IFLA_IFNAME, tmpl->l_name); 01004 01005 if (tmpl->ce_mask & LINK_ATTR_OPERSTATE) 01006 NLA_PUT_U8(msg, IFLA_OPERSTATE, tmpl->l_operstate); 01007 01008 if (tmpl->ce_mask & LINK_ATTR_LINKMODE) 01009 NLA_PUT_U8(msg, IFLA_LINKMODE, tmpl->l_linkmode); 01010 01011 if ((tmpl->ce_mask & LINK_ATTR_LINKINFO) && tmpl->l_info_ops && 01012 tmpl->l_info_ops->io_put_attrs) { 01013 struct nlattr *info; 01014 01015 if (!(info = nla_nest_start(msg, IFLA_LINKINFO))) 01016 goto nla_put_failure; 01017 01018 NLA_PUT_STRING(msg, IFLA_INFO_KIND, tmpl->l_info_ops->io_name); 01019 01020 if (tmpl->l_info_ops->io_put_attrs(msg, tmpl) < 0) 01021 goto nla_put_failure; 01022 01023 nla_nest_end(msg, info); 01024 } 01025 01026 return msg; 01027 01028 nla_put_failure: 01029 nlmsg_free(msg); 01030 return NULL; 01031 } 01032 01033 /** 01034 * Change link attributes 01035 * @arg handle netlink handle 01036 * @arg old link to be changed 01037 * @arg tmpl template with requested changes 01038 * @arg flags additional netlink message flags 01039 * 01040 * Builds a new netlink message by calling rtnl_link_build_change_request(), 01041 * sends the request to the kernel and waits for the next ACK to be 01042 * received, i.e. blocks until the request has been processed. 01043 * 01044 * @return 0 on success or a negative error code 01045 * @note Not all attributes can be changed, see 01046 * \ref link_changeable "Changeable Attributes" for more details. 01047 */ 01048 int rtnl_link_change(struct nl_handle *handle, struct rtnl_link *old, 01049 struct rtnl_link *tmpl, int flags) 01050 { 01051 int err; 01052 struct nl_msg *msg; 01053 01054 msg = rtnl_link_build_change_request(old, tmpl, flags); 01055 if (!msg) 01056 return nl_errno(ENOMEM); 01057 01058 err = nl_send_auto_complete(handle, msg); 01059 if (err < 0) 01060 return err; 01061 01062 nlmsg_free(msg); 01063 return nl_wait_for_ack(handle); 01064 } 01065 01066 /** @} */ 01067 01068 /** 01069 * @name Name <-> Index Translations 01070 * @{ 01071 */ 01072 01073 /** 01074 * Translate an interface index to the corresponding link name 01075 * @arg cache link cache 01076 * @arg ifindex link interface index 01077 * @arg dst destination buffer 01078 * @arg len length of destination buffer 01079 * 01080 * Translates the specified interface index to the corresponding 01081 * link name and stores the name in the destination buffer. 01082 * 01083 * @return link name or NULL if no match was found. 01084 */ 01085 char * rtnl_link_i2name(struct nl_cache *cache, int ifindex, char *dst, 01086 size_t len) 01087 { 01088 struct rtnl_link *link = rtnl_link_get(cache, ifindex); 01089 01090 if (link) { 01091 strncpy(dst, link->l_name, len - 1); 01092 rtnl_link_put(link); 01093 return dst; 01094 } 01095 01096 return NULL; 01097 } 01098 01099 /** 01100 * Translate a link name to the corresponding interface index 01101 * @arg cache link cache 01102 * @arg name link name 01103 * 01104 * @return interface index or RTNL_LINK_NOT_FOUND if no match was found. 01105 */ 01106 int rtnl_link_name2i(struct nl_cache *cache, const char *name) 01107 { 01108 int ifindex = RTNL_LINK_NOT_FOUND; 01109 struct rtnl_link *link; 01110 01111 link = rtnl_link_get_by_name(cache, name); 01112 if (link) { 01113 ifindex = link->l_index; 01114 rtnl_link_put(link); 01115 } 01116 01117 return ifindex; 01118 } 01119 01120 /** @} */ 01121 01122 /** 01123 * @name Link Flags Translations 01124 * @{ 01125 */ 01126 01127 static struct trans_tbl link_flags[] = { 01128 __ADD(IFF_LOOPBACK, loopback) 01129 __ADD(IFF_BROADCAST, broadcast) 01130 __ADD(IFF_POINTOPOINT, pointopoint) 01131 __ADD(IFF_MULTICAST, multicast) 01132 __ADD(IFF_NOARP, noarp) 01133 __ADD(IFF_ALLMULTI, allmulti) 01134 __ADD(IFF_PROMISC, promisc) 01135 __ADD(IFF_MASTER, master) 01136 __ADD(IFF_SLAVE, slave) 01137 __ADD(IFF_DEBUG, debug) 01138 __ADD(IFF_DYNAMIC, dynamic) 01139 __ADD(IFF_AUTOMEDIA, automedia) 01140 __ADD(IFF_PORTSEL, portsel) 01141 __ADD(IFF_NOTRAILERS, notrailers) 01142 __ADD(IFF_UP, up) 01143 __ADD(IFF_RUNNING, running) 01144 __ADD(IFF_LOWER_UP, lowerup) 01145 __ADD(IFF_DORMANT, dormant) 01146 __ADD(IFF_ECHO, echo) 01147 }; 01148 01149 char * rtnl_link_flags2str(int flags, char *buf, size_t len) 01150 { 01151 return __flags2str(flags, buf, len, link_flags, 01152 ARRAY_SIZE(link_flags)); 01153 } 01154 01155 int rtnl_link_str2flags(const char *name) 01156 { 01157 return __str2flags(name, link_flags, ARRAY_SIZE(link_flags)); 01158 } 01159 01160 /** @} */ 01161 01162 /** 01163 * @name Link Statistics Translations 01164 * @{ 01165 */ 01166 01167 static struct trans_tbl link_stats[] = { 01168 __ADD(RTNL_LINK_RX_PACKETS, rx_packets) 01169 __ADD(RTNL_LINK_TX_PACKETS, tx_packets) 01170 __ADD(RTNL_LINK_RX_BYTES, rx_bytes) 01171 __ADD(RTNL_LINK_TX_BYTES, tx_bytes) 01172 __ADD(RTNL_LINK_RX_ERRORS, rx_errors) 01173 __ADD(RTNL_LINK_TX_ERRORS, tx_errors) 01174 __ADD(RTNL_LINK_RX_DROPPED, rx_dropped) 01175 __ADD(RTNL_LINK_TX_DROPPED, tx_dropped) 01176 __ADD(RTNL_LINK_RX_COMPRESSED, rx_compressed) 01177 __ADD(RTNL_LINK_TX_COMPRESSED, tx_compressed) 01178 __ADD(RTNL_LINK_RX_FIFO_ERR, rx_fifo_err) 01179 __ADD(RTNL_LINK_TX_FIFO_ERR, tx_fifo_err) 01180 __ADD(RTNL_LINK_RX_LEN_ERR, rx_len_err) 01181 __ADD(RTNL_LINK_RX_OVER_ERR, rx_over_err) 01182 __ADD(RTNL_LINK_RX_CRC_ERR, rx_crc_err) 01183 __ADD(RTNL_LINK_RX_FRAME_ERR, rx_frame_err) 01184 __ADD(RTNL_LINK_RX_MISSED_ERR, rx_missed_err) 01185 __ADD(RTNL_LINK_TX_ABORT_ERR, tx_abort_err) 01186 __ADD(RTNL_LINK_TX_CARRIER_ERR, tx_carrier_err) 01187 __ADD(RTNL_LINK_TX_HBEAT_ERR, tx_hbeat_err) 01188 __ADD(RTNL_LINK_TX_WIN_ERR, tx_win_err) 01189 __ADD(RTNL_LINK_TX_COLLISIONS, tx_collision) 01190 __ADD(RTNL_LINK_MULTICAST, multicast) 01191 }; 01192 01193 char *rtnl_link_stat2str(int st, char *buf, size_t len) 01194 { 01195 return __type2str(st, buf, len, link_stats, ARRAY_SIZE(link_stats)); 01196 } 01197 01198 int rtnl_link_str2stat(const char *name) 01199 { 01200 return __str2type(name, link_stats, ARRAY_SIZE(link_stats)); 01201 } 01202 01203 /** @} */ 01204 01205 /** 01206 * @name Link Operstate Translations 01207 * @{ 01208 */ 01209 01210 static struct trans_tbl link_operstates[] = { 01211 __ADD(IF_OPER_UNKNOWN, unknown) 01212 __ADD(IF_OPER_NOTPRESENT, notpresent) 01213 __ADD(IF_OPER_DOWN, down) 01214 __ADD(IF_OPER_LOWERLAYERDOWN, lowerlayerdown) 01215 __ADD(IF_OPER_TESTING, testing) 01216 __ADD(IF_OPER_DORMANT, dormant) 01217 __ADD(IF_OPER_UP, up) 01218 }; 01219 01220 char *rtnl_link_operstate2str(int st, char *buf, size_t len) 01221 { 01222 return __type2str(st, buf, len, link_operstates, 01223 ARRAY_SIZE(link_operstates)); 01224 } 01225 01226 int rtnl_link_str2operstate(const char *name) 01227 { 01228 return __str2type(name, link_operstates, 01229 ARRAY_SIZE(link_operstates)); 01230 } 01231 01232 /** @} */ 01233 01234 /** 01235 * @name Link Mode Translations 01236 * @{ 01237 */ 01238 01239 static struct trans_tbl link_modes[] = { 01240 __ADD(IF_LINK_MODE_DEFAULT, default) 01241 __ADD(IF_LINK_MODE_DORMANT, dormant) 01242 }; 01243 01244 char *rtnl_link_mode2str(int st, char *buf, size_t len) 01245 { 01246 return __type2str(st, buf, len, link_modes, ARRAY_SIZE(link_modes)); 01247 } 01248 01249 int rtnl_link_str2mode(const char *name) 01250 { 01251 return __str2type(name, link_modes, ARRAY_SIZE(link_modes)); 01252 } 01253 01254 /** @} */ 01255 01256 /** 01257 * @name Attributes 01258 * @{ 01259 */ 01260 01261 void rtnl_link_set_qdisc(struct rtnl_link *link, const char *qdisc) 01262 { 01263 strncpy(link->l_qdisc, qdisc, sizeof(link->l_qdisc) - 1); 01264 link->ce_mask |= LINK_ATTR_QDISC; 01265 } 01266 01267 char *rtnl_link_get_qdisc(struct rtnl_link *link) 01268 { 01269 if (link->ce_mask & LINK_ATTR_QDISC) 01270 return link->l_qdisc; 01271 else 01272 return NULL; 01273 } 01274 01275 void rtnl_link_set_name(struct rtnl_link *link, const char *name) 01276 { 01277 strncpy(link->l_name, name, sizeof(link->l_name) - 1); 01278 link->ce_mask |= LINK_ATTR_IFNAME; 01279 } 01280 01281 char *rtnl_link_get_name(struct rtnl_link *link) 01282 { 01283 if (link->ce_mask & LINK_ATTR_IFNAME) 01284 return link->l_name; 01285 else 01286 return NULL; 01287 } 01288 01289 static inline void __assign_addr(struct rtnl_link *link, struct nl_addr **pos, 01290 struct nl_addr *new, int flag) 01291 { 01292 if (*pos) 01293 nl_addr_put(*pos); 01294 01295 nl_addr_get(new); 01296 *pos = new; 01297 01298 link->ce_mask |= flag; 01299 } 01300 01301 void rtnl_link_set_addr(struct rtnl_link *link, struct nl_addr *addr) 01302 { 01303 __assign_addr(link, &link->l_addr, addr, LINK_ATTR_ADDR); 01304 } 01305 01306 struct nl_addr *rtnl_link_get_addr(struct rtnl_link *link) 01307 { 01308 if (link->ce_mask & LINK_ATTR_ADDR) 01309 return link->l_addr; 01310 else 01311 return NULL; 01312 } 01313 01314 void rtnl_link_set_broadcast(struct rtnl_link *link, struct nl_addr *brd) 01315 { 01316 __assign_addr(link, &link->l_bcast, brd, LINK_ATTR_BRD); 01317 } 01318 01319 struct nl_addr *rtnl_link_get_broadcast(struct rtnl_link *link) 01320 { 01321 if (link->ce_mask & LINK_ATTR_BRD) 01322 return link->l_bcast; 01323 else 01324 return NULL; 01325 } 01326 01327 void rtnl_link_set_flags(struct rtnl_link *link, unsigned int flags) 01328 { 01329 link->l_flag_mask |= flags; 01330 link->l_flags |= flags; 01331 link->ce_mask |= LINK_ATTR_FLAGS; 01332 } 01333 01334 void rtnl_link_unset_flags(struct rtnl_link *link, unsigned int flags) 01335 { 01336 link->l_flag_mask |= flags; 01337 link->l_flags &= ~flags; 01338 link->ce_mask |= LINK_ATTR_FLAGS; 01339 } 01340 01341 unsigned int rtnl_link_get_flags(struct rtnl_link *link) 01342 { 01343 return link->l_flags; 01344 } 01345 01346 void rtnl_link_set_family(struct rtnl_link *link, int family) 01347 { 01348 link->l_family = family; 01349 link->ce_mask |= LINK_ATTR_FAMILY; 01350 } 01351 01352 int rtnl_link_get_family(struct rtnl_link *link) 01353 { 01354 if (link->l_family & LINK_ATTR_FAMILY) 01355 return link->l_family; 01356 else 01357 return AF_UNSPEC; 01358 } 01359 01360 void rtnl_link_set_arptype(struct rtnl_link *link, unsigned int arptype) 01361 { 01362 link->l_arptype = arptype; 01363 } 01364 01365 unsigned int rtnl_link_get_arptype(struct rtnl_link *link) 01366 { 01367 return link->l_arptype; 01368 } 01369 01370 void rtnl_link_set_ifindex(struct rtnl_link *link, int ifindex) 01371 { 01372 link->l_index = ifindex; 01373 link->ce_mask |= LINK_ATTR_IFINDEX; 01374 } 01375 01376 int rtnl_link_get_ifindex(struct rtnl_link *link) 01377 { 01378 if (link->ce_mask & LINK_ATTR_IFINDEX) 01379 return link->l_index; 01380 else 01381 return RTNL_LINK_NOT_FOUND; 01382 } 01383 01384 void rtnl_link_set_mtu(struct rtnl_link *link, unsigned int mtu) 01385 { 01386 link->l_mtu = mtu; 01387 link->ce_mask |= LINK_ATTR_MTU; 01388 } 01389 01390 unsigned int rtnl_link_get_mtu(struct rtnl_link *link) 01391 { 01392 if (link->ce_mask & LINK_ATTR_MTU) 01393 return link->l_mtu; 01394 else 01395 return 0; 01396 } 01397 01398 void rtnl_link_set_txqlen(struct rtnl_link *link, unsigned int txqlen) 01399 { 01400 link->l_txqlen = txqlen; 01401 link->ce_mask |= LINK_ATTR_TXQLEN; 01402 } 01403 01404 unsigned int rtnl_link_get_txqlen(struct rtnl_link *link) 01405 { 01406 if (link->ce_mask & LINK_ATTR_TXQLEN) 01407 return link->l_txqlen; 01408 else 01409 return UINT_MAX; 01410 } 01411 01412 void rtnl_link_set_weight(struct rtnl_link *link, unsigned int weight) 01413 { 01414 link->l_weight = weight; 01415 link->ce_mask |= LINK_ATTR_WEIGHT; 01416 } 01417 01418 unsigned int rtnl_link_get_weight(struct rtnl_link *link) 01419 { 01420 if (link->ce_mask & LINK_ATTR_WEIGHT) 01421 return link->l_weight; 01422 else 01423 return UINT_MAX; 01424 } 01425 01426 void rtnl_link_set_link(struct rtnl_link *link, int ifindex) 01427 { 01428 link->l_link = ifindex; 01429 link->ce_mask |= LINK_ATTR_LINK; 01430 } 01431 01432 int rtnl_link_get_link(struct rtnl_link *link) 01433 { 01434 if (link->ce_mask & LINK_ATTR_LINK) 01435 return link->l_link; 01436 else 01437 return RTNL_LINK_NOT_FOUND; 01438 } 01439 01440 void rtnl_link_set_master(struct rtnl_link *link, int ifindex) 01441 { 01442 link->l_master = ifindex; 01443 link->ce_mask |= LINK_ATTR_MASTER; 01444 } 01445 01446 int rtnl_link_get_master(struct rtnl_link *link) 01447 { 01448 if (link->ce_mask & LINK_ATTR_MASTER) 01449 return link->l_master; 01450 else 01451 return RTNL_LINK_NOT_FOUND; 01452 } 01453 01454 void rtnl_link_set_operstate(struct rtnl_link *link, uint8_t operstate) 01455 { 01456 link->l_operstate = operstate; 01457 link->ce_mask |= LINK_ATTR_OPERSTATE; 01458 } 01459 01460 uint8_t rtnl_link_get_operstate(struct rtnl_link *link) 01461 { 01462 if (link->ce_mask & LINK_ATTR_OPERSTATE) 01463 return link->l_operstate; 01464 else 01465 return IF_OPER_UNKNOWN; 01466 } 01467 01468 void rtnl_link_set_linkmode(struct rtnl_link *link, uint8_t linkmode) 01469 { 01470 link->l_linkmode = linkmode; 01471 link->ce_mask |= LINK_ATTR_LINKMODE; 01472 } 01473 01474 uint8_t rtnl_link_get_linkmode(struct rtnl_link *link) 01475 { 01476 if (link->ce_mask & LINK_ATTR_LINKMODE) 01477 return link->l_linkmode; 01478 else 01479 return IF_LINK_MODE_DEFAULT; 01480 } 01481 01482 uint64_t rtnl_link_get_stat(struct rtnl_link *link, int id) 01483 { 01484 if (id < 0 || id > RTNL_LINK_STATS_MAX) 01485 return 0; 01486 01487 return link->l_stats[id]; 01488 } 01489 01490 /** 01491 * Specify the info type of a link 01492 * @arg link link object 01493 * @arg type info type 01494 * 01495 * Looks up the info type and prepares the link to store info type 01496 * specific attributes. If an info type has been assigned already 01497 * it will be released with all changes lost. 01498 * 01499 * @return 0 on success or a negative errror code. 01500 */ 01501 int rtnl_link_set_info_type(struct rtnl_link *link, const char *type) 01502 { 01503 struct rtnl_link_info_ops *io; 01504 int err; 01505 01506 if ((io = rtnl_link_info_ops_lookup(type)) == NULL) 01507 return nl_error(ENOENT, "No such link info type exists"); 01508 01509 if (link->l_info_ops) 01510 release_link_info(link); 01511 01512 if ((err = io->io_alloc(link)) < 0) 01513 return err; 01514 01515 link->l_info_ops = io; 01516 01517 return 0; 01518 } 01519 01520 /** 01521 * Return info type of a link 01522 * @arg link link object 01523 * 01524 * @note The returned pointer is only valid as long as the link exists 01525 * @return Info type name or NULL if unknown. 01526 */ 01527 char *rtnl_link_get_info_type(struct rtnl_link *link) 01528 { 01529 if (link->l_info_ops) 01530 return link->l_info_ops->io_name; 01531 else 01532 return NULL; 01533 } 01534 01535 /** @} */ 01536 01537 static struct nl_object_ops link_obj_ops = { 01538 .oo_name = "route/link", 01539 .oo_size = sizeof(struct rtnl_link), 01540 .oo_free_data = link_free_data, 01541 .oo_clone = link_clone, 01542 .oo_dump[NL_DUMP_BRIEF] = link_dump_brief, 01543 .oo_dump[NL_DUMP_FULL] = link_dump_full, 01544 .oo_dump[NL_DUMP_STATS] = link_dump_stats, 01545 .oo_dump[NL_DUMP_XML] = link_dump_xml, 01546 .oo_dump[NL_DUMP_ENV] = link_dump_env, 01547 .oo_compare = link_compare, 01548 .oo_attrs2str = link_attrs2str, 01549 .oo_id_attrs = LINK_ATTR_IFINDEX, 01550 }; 01551 01552 static struct nl_af_group link_groups[] = { 01553 { AF_UNSPEC, RTNLGRP_LINK }, 01554 { END_OF_GROUP_LIST }, 01555 }; 01556 01557 static struct nl_cache_ops rtnl_link_ops = { 01558 .co_name = "route/link", 01559 .co_hdrsize = sizeof(struct ifinfomsg), 01560 .co_msgtypes = { 01561 { RTM_NEWLINK, NL_ACT_NEW, "new" }, 01562 { RTM_DELLINK, NL_ACT_DEL, "del" }, 01563 { RTM_GETLINK, NL_ACT_GET, "get" }, 01564 END_OF_MSGTYPES_LIST, 01565 }, 01566 .co_protocol = NETLINK_ROUTE, 01567 .co_groups = link_groups, 01568 .co_request_update = link_request_update, 01569 .co_msg_parser = link_msg_parser, 01570 .co_obj_ops = &link_obj_ops, 01571 }; 01572 01573 static void __init link_init(void) 01574 { 01575 nl_cache_mngt_register(&rtnl_link_ops); 01576 } 01577 01578 static void __exit link_exit(void) 01579 { 01580 nl_cache_mngt_unregister(&rtnl_link_ops); 01581 } 01582 01583 /** @} */