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e9e28be3 | 1 | /* |
782e6111 | 2 | * Copyright (c) 2009, 2010, 2011 Nicira Networks. |
e9e28be3 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
d3980822 BP |
18 | |
19 | #include "netdev-linux.h" | |
20 | ||
8b61709d | 21 | #include <assert.h> |
e9e28be3 | 22 | #include <errno.h> |
8b61709d BP |
23 | #include <fcntl.h> |
24 | #include <arpa/inet.h> | |
25 | #include <inttypes.h> | |
c1c9c9c4 | 26 | #include <linux/gen_stats.h> |
8b61709d | 27 | #include <linux/if_tun.h> |
a740f0de | 28 | #include <linux/ip.h> |
8b61709d BP |
29 | #include <linux/types.h> |
30 | #include <linux/ethtool.h> | |
63331829 | 31 | #include <linux/mii.h> |
6f42c8ea | 32 | #include <linux/pkt_sched.h> |
e9e28be3 | 33 | #include <linux/rtnetlink.h> |
8b61709d BP |
34 | #include <linux/sockios.h> |
35 | #include <linux/version.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/ioctl.h> | |
38 | #include <sys/socket.h> | |
39 | #include <netpacket/packet.h> | |
40 | #include <net/ethernet.h> | |
41 | #include <net/if.h> | |
a740f0de | 42 | #include <linux/if_tunnel.h> |
8b61709d BP |
43 | #include <net/if_arp.h> |
44 | #include <net/if_packet.h> | |
45 | #include <net/route.h> | |
46 | #include <netinet/in.h> | |
e9e28be3 | 47 | #include <poll.h> |
8b61709d BP |
48 | #include <stdlib.h> |
49 | #include <string.h> | |
50 | #include <unistd.h> | |
e9e28be3 BP |
51 | |
52 | #include "coverage.h" | |
9fe3b9a2 | 53 | #include "dpif-linux.h" |
8b61709d BP |
54 | #include "dynamic-string.h" |
55 | #include "fatal-signal.h" | |
93b13be8 BP |
56 | #include "hash.h" |
57 | #include "hmap.h" | |
8b61709d | 58 | #include "netdev-provider.h" |
7fbef77a | 59 | #include "netdev-vport.h" |
e9e28be3 | 60 | #include "netlink.h" |
45c8d3a1 | 61 | #include "netlink-notifier.h" |
2fe27d5a | 62 | #include "netlink-socket.h" |
e9e28be3 | 63 | #include "ofpbuf.h" |
8b61709d BP |
64 | #include "openflow/openflow.h" |
65 | #include "packets.h" | |
66 | #include "poll-loop.h" | |
21d6e22e | 67 | #include "rtnetlink-link.h" |
8b61709d BP |
68 | #include "socket-util.h" |
69 | #include "shash.h" | |
19993ef3 | 70 | #include "sset.h" |
1670c579 | 71 | #include "timer.h" |
e9e28be3 | 72 | #include "vlog.h" |
5136ce49 | 73 | |
d98e6007 | 74 | VLOG_DEFINE_THIS_MODULE(netdev_linux); |
d76f09ea BP |
75 | |
76 | COVERAGE_DEFINE(netdev_get_vlan_vid); | |
77 | COVERAGE_DEFINE(netdev_set_policing); | |
78 | COVERAGE_DEFINE(netdev_arp_lookup); | |
79 | COVERAGE_DEFINE(netdev_get_ifindex); | |
80 | COVERAGE_DEFINE(netdev_get_hwaddr); | |
81 | COVERAGE_DEFINE(netdev_set_hwaddr); | |
82 | COVERAGE_DEFINE(netdev_ethtool); | |
8b61709d BP |
83 | \f |
84 | /* These were introduced in Linux 2.6.14, so they might be missing if we have | |
85 | * old headers. */ | |
86 | #ifndef ADVERTISED_Pause | |
87 | #define ADVERTISED_Pause (1 << 13) | |
88 | #endif | |
89 | #ifndef ADVERTISED_Asym_Pause | |
90 | #define ADVERTISED_Asym_Pause (1 << 14) | |
91 | #endif | |
92 | ||
e47bd51a JP |
93 | /* These were introduced in Linux 2.6.24, so they might be missing if we |
94 | * have old headers. */ | |
95 | #ifndef ETHTOOL_GFLAGS | |
96 | #define ETHTOOL_GFLAGS 0x00000025 /* Get flags bitmap(ethtool_value) */ | |
97 | #endif | |
98 | #ifndef ETHTOOL_SFLAGS | |
99 | #define ETHTOOL_SFLAGS 0x00000026 /* Set flags bitmap(ethtool_value) */ | |
100 | #endif | |
101 | ||
c1c9c9c4 BP |
102 | /* This was introduced in Linux 2.6.25, so it might be missing if we have old |
103 | * headers. */ | |
104 | #ifndef TC_RTAB_SIZE | |
105 | #define TC_RTAB_SIZE 1024 | |
106 | #endif | |
107 | ||
0a811051 | 108 | static struct nln_notifier netdev_linux_cache_notifier; |
46415c90 | 109 | static int cache_notifier_refcount; |
8b61709d BP |
110 | |
111 | enum { | |
7fbef77a JG |
112 | VALID_IFINDEX = 1 << 0, |
113 | VALID_ETHERADDR = 1 << 1, | |
114 | VALID_IN4 = 1 << 2, | |
115 | VALID_IN6 = 1 << 3, | |
116 | VALID_MTU = 1 << 4, | |
117 | VALID_CARRIER = 1 << 5, | |
f613a0d7 PS |
118 | VALID_POLICING = 1 << 6, |
119 | VALID_HAVE_VPORT_STATS = 1 << 7 | |
8b61709d BP |
120 | }; |
121 | ||
149f577a JG |
122 | struct tap_state { |
123 | int fd; | |
61b999dd | 124 | bool opened; |
149f577a | 125 | }; |
c1c9c9c4 BP |
126 | \f |
127 | /* Traffic control. */ | |
128 | ||
129 | /* An instance of a traffic control class. Always associated with a particular | |
93b13be8 BP |
130 | * network device. |
131 | * | |
132 | * Each TC implementation subclasses this with whatever additional data it | |
133 | * needs. */ | |
c1c9c9c4 BP |
134 | struct tc { |
135 | const struct tc_ops *ops; | |
93b13be8 BP |
136 | struct hmap queues; /* Contains "struct tc_queue"s. |
137 | * Read by generic TC layer. | |
138 | * Written only by TC implementation. */ | |
139 | }; | |
c1c9c9c4 | 140 | |
93b13be8 BP |
141 | /* One traffic control queue. |
142 | * | |
143 | * Each TC implementation subclasses this with whatever additional data it | |
144 | * needs. */ | |
145 | struct tc_queue { | |
146 | struct hmap_node hmap_node; /* In struct tc's "queues" hmap. */ | |
147 | unsigned int queue_id; /* OpenFlow queue ID. */ | |
c1c9c9c4 BP |
148 | }; |
149 | ||
150 | /* A particular kind of traffic control. Each implementation generally maps to | |
151 | * one particular Linux qdisc class. | |
152 | * | |
153 | * The functions below return 0 if successful or a positive errno value on | |
154 | * failure, except where otherwise noted. All of them must be provided, except | |
155 | * where otherwise noted. */ | |
156 | struct tc_ops { | |
157 | /* Name used by kernel in the TCA_KIND attribute of tcmsg, e.g. "htb". | |
158 | * This is null for tc_ops_default and tc_ops_other, for which there are no | |
159 | * appropriate values. */ | |
160 | const char *linux_name; | |
161 | ||
162 | /* Name used in OVS database, e.g. "linux-htb". Must be nonnull. */ | |
163 | const char *ovs_name; | |
164 | ||
165 | /* Number of supported OpenFlow queues, 0 for qdiscs that have no | |
166 | * queues. The queues are numbered 0 through n_queues - 1. */ | |
167 | unsigned int n_queues; | |
168 | ||
169 | /* Called to install this TC class on 'netdev'. The implementation should | |
170 | * make the Netlink calls required to set up 'netdev' with the right qdisc | |
171 | * and configure it according to 'details'. The implementation may assume | |
172 | * that the current qdisc is the default; that is, there is no need for it | |
173 | * to delete the current qdisc before installing itself. | |
174 | * | |
175 | * The contents of 'details' should be documented as valid for 'ovs_name' | |
176 | * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml | |
177 | * (which is built as ovs-vswitchd.conf.db(8)). | |
178 | * | |
179 | * This function must return 0 if and only if it sets 'netdev->tc' to an | |
180 | * initialized 'struct tc'. | |
181 | * | |
182 | * (This function is null for tc_ops_other, which cannot be installed. For | |
183 | * other TC classes it should always be nonnull.) */ | |
184 | int (*tc_install)(struct netdev *netdev, const struct shash *details); | |
185 | ||
186 | /* Called when the netdev code determines (through a Netlink query) that | |
187 | * this TC class's qdisc is installed on 'netdev', but we didn't install | |
188 | * it ourselves and so don't know any of the details. | |
189 | * | |
190 | * 'nlmsg' is the kernel reply to a RTM_GETQDISC Netlink message for | |
191 | * 'netdev'. The TCA_KIND attribute of 'nlmsg' is 'linux_name'. The | |
192 | * implementation should parse the other attributes of 'nlmsg' as | |
193 | * necessary to determine its configuration. If necessary it should also | |
194 | * use Netlink queries to determine the configuration of queues on | |
195 | * 'netdev'. | |
196 | * | |
197 | * This function must return 0 if and only if it sets 'netdev->tc' to an | |
198 | * initialized 'struct tc'. */ | |
199 | int (*tc_load)(struct netdev *netdev, struct ofpbuf *nlmsg); | |
200 | ||
201 | /* Destroys the data structures allocated by the implementation as part of | |
202 | * 'tc'. (This includes destroying 'tc->queues' by calling | |
203 | * tc_destroy(tc). | |
204 | * | |
205 | * The implementation should not need to perform any Netlink calls. If | |
206 | * desirable, the caller is responsible for deconfiguring the kernel qdisc. | |
207 | * (But it may not be desirable.) | |
208 | * | |
209 | * This function may be null if 'tc' is trivial. */ | |
210 | void (*tc_destroy)(struct tc *tc); | |
211 | ||
212 | /* Retrieves details of 'netdev->tc' configuration into 'details'. | |
213 | * | |
214 | * The implementation should not need to perform any Netlink calls, because | |
215 | * the 'tc_install' or 'tc_load' that instantiated 'netdev->tc' should have | |
216 | * cached the configuration. | |
217 | * | |
218 | * The contents of 'details' should be documented as valid for 'ovs_name' | |
219 | * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml | |
220 | * (which is built as ovs-vswitchd.conf.db(8)). | |
221 | * | |
222 | * This function may be null if 'tc' is not configurable. | |
223 | */ | |
224 | int (*qdisc_get)(const struct netdev *netdev, struct shash *details); | |
225 | ||
226 | /* Reconfigures 'netdev->tc' according to 'details', performing any | |
227 | * required Netlink calls to complete the reconfiguration. | |
228 | * | |
229 | * The contents of 'details' should be documented as valid for 'ovs_name' | |
230 | * in the "other_config" column in the "QoS" table in vswitchd/vswitch.xml | |
231 | * (which is built as ovs-vswitchd.conf.db(8)). | |
232 | * | |
233 | * This function may be null if 'tc' is not configurable. | |
234 | */ | |
235 | int (*qdisc_set)(struct netdev *, const struct shash *details); | |
236 | ||
93b13be8 BP |
237 | /* Retrieves details of 'queue' on 'netdev->tc' into 'details'. 'queue' is |
238 | * one of the 'struct tc_queue's within 'netdev->tc->queues'. | |
c1c9c9c4 BP |
239 | * |
240 | * The contents of 'details' should be documented as valid for 'ovs_name' | |
241 | * in the "other_config" column in the "Queue" table in | |
242 | * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). | |
243 | * | |
244 | * The implementation should not need to perform any Netlink calls, because | |
245 | * the 'tc_install' or 'tc_load' that instantiated 'netdev->tc' should have | |
246 | * cached the queue configuration. | |
247 | * | |
248 | * This function may be null if 'tc' does not have queues ('n_queues' is | |
249 | * 0). */ | |
93b13be8 | 250 | int (*class_get)(const struct netdev *netdev, const struct tc_queue *queue, |
c1c9c9c4 BP |
251 | struct shash *details); |
252 | ||
253 | /* Configures or reconfigures 'queue_id' on 'netdev->tc' according to | |
254 | * 'details', perfoming any required Netlink calls to complete the | |
255 | * reconfiguration. The caller ensures that 'queue_id' is less than | |
256 | * 'n_queues'. | |
257 | * | |
258 | * The contents of 'details' should be documented as valid for 'ovs_name' | |
259 | * in the "other_config" column in the "Queue" table in | |
260 | * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). | |
261 | * | |
262 | * This function may be null if 'tc' does not have queues or its queues are | |
263 | * not configurable. */ | |
264 | int (*class_set)(struct netdev *, unsigned int queue_id, | |
265 | const struct shash *details); | |
266 | ||
93b13be8 BP |
267 | /* Deletes 'queue' from 'netdev->tc'. 'queue' is one of the 'struct |
268 | * tc_queue's within 'netdev->tc->queues'. | |
c1c9c9c4 BP |
269 | * |
270 | * This function may be null if 'tc' does not have queues or its queues | |
271 | * cannot be deleted. */ | |
93b13be8 | 272 | int (*class_delete)(struct netdev *, struct tc_queue *queue); |
c1c9c9c4 | 273 | |
93b13be8 BP |
274 | /* Obtains stats for 'queue' from 'netdev->tc'. 'queue' is one of the |
275 | * 'struct tc_queue's within 'netdev->tc->queues'. | |
c1c9c9c4 BP |
276 | * |
277 | * On success, initializes '*stats'. | |
278 | * | |
279 | * This function may be null if 'tc' does not have queues or if it cannot | |
280 | * report queue statistics. */ | |
93b13be8 BP |
281 | int (*class_get_stats)(const struct netdev *netdev, |
282 | const struct tc_queue *queue, | |
c1c9c9c4 BP |
283 | struct netdev_queue_stats *stats); |
284 | ||
285 | /* Extracts queue stats from 'nlmsg', which is a response to a | |
286 | * RTM_GETTCLASS message, and passes them to 'cb' along with 'aux'. | |
287 | * | |
288 | * This function may be null if 'tc' does not have queues or if it cannot | |
289 | * report queue statistics. */ | |
290 | int (*class_dump_stats)(const struct netdev *netdev, | |
291 | const struct ofpbuf *nlmsg, | |
292 | netdev_dump_queue_stats_cb *cb, void *aux); | |
293 | }; | |
294 | ||
295 | static void | |
296 | tc_init(struct tc *tc, const struct tc_ops *ops) | |
297 | { | |
298 | tc->ops = ops; | |
93b13be8 | 299 | hmap_init(&tc->queues); |
c1c9c9c4 BP |
300 | } |
301 | ||
302 | static void | |
303 | tc_destroy(struct tc *tc) | |
304 | { | |
93b13be8 | 305 | hmap_destroy(&tc->queues); |
c1c9c9c4 BP |
306 | } |
307 | ||
308 | static const struct tc_ops tc_ops_htb; | |
a339aa81 | 309 | static const struct tc_ops tc_ops_hfsc; |
c1c9c9c4 BP |
310 | static const struct tc_ops tc_ops_default; |
311 | static const struct tc_ops tc_ops_other; | |
312 | ||
313 | static const struct tc_ops *tcs[] = { | |
314 | &tc_ops_htb, /* Hierarchy token bucket (see tc-htb(8)). */ | |
a339aa81 | 315 | &tc_ops_hfsc, /* Hierarchical fair service curve. */ |
c1c9c9c4 BP |
316 | &tc_ops_default, /* Default qdisc (see tc-pfifo_fast(8)). */ |
317 | &tc_ops_other, /* Some other qdisc. */ | |
318 | NULL | |
319 | }; | |
149f577a | 320 | |
c1c9c9c4 BP |
321 | static unsigned int tc_make_handle(unsigned int major, unsigned int minor); |
322 | static unsigned int tc_get_major(unsigned int handle); | |
323 | static unsigned int tc_get_minor(unsigned int handle); | |
324 | ||
325 | static unsigned int tc_ticks_to_bytes(unsigned int rate, unsigned int ticks); | |
326 | static unsigned int tc_bytes_to_ticks(unsigned int rate, unsigned int size); | |
327 | static unsigned int tc_buffer_per_jiffy(unsigned int rate); | |
328 | ||
329 | static struct tcmsg *tc_make_request(const struct netdev *, int type, | |
330 | unsigned int flags, struct ofpbuf *); | |
331 | static int tc_transact(struct ofpbuf *request, struct ofpbuf **replyp); | |
332 | ||
333 | static int tc_parse_qdisc(const struct ofpbuf *, const char **kind, | |
334 | struct nlattr **options); | |
335 | static int tc_parse_class(const struct ofpbuf *, unsigned int *queue_id, | |
336 | struct nlattr **options, | |
337 | struct netdev_queue_stats *); | |
338 | static int tc_query_class(const struct netdev *, | |
339 | unsigned int handle, unsigned int parent, | |
340 | struct ofpbuf **replyp); | |
341 | static int tc_delete_class(const struct netdev *, unsigned int handle); | |
342 | ||
343 | static int tc_del_qdisc(struct netdev *netdev); | |
344 | static int tc_query_qdisc(const struct netdev *netdev); | |
345 | ||
346 | static int tc_calc_cell_log(unsigned int mtu); | |
347 | static void tc_fill_rate(struct tc_ratespec *rate, uint64_t bps, int mtu); | |
348 | static void tc_put_rtab(struct ofpbuf *, uint16_t type, | |
349 | const struct tc_ratespec *rate); | |
350 | static int tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes); | |
351 | \f | |
149f577a JG |
352 | struct netdev_dev_linux { |
353 | struct netdev_dev netdev_dev; | |
354 | ||
8b61709d | 355 | struct shash_node *shash_node; |
149f577a | 356 | unsigned int cache_valid; |
ac4d3bcb | 357 | unsigned int change_seq; |
8b61709d | 358 | |
1670c579 EJ |
359 | bool miimon; /* Link status of last poll. */ |
360 | long long int miimon_interval; /* Miimon Poll rate. Disabled if <= 0. */ | |
361 | struct timer miimon_timer; | |
362 | ||
8722022c BP |
363 | /* The following are figured out "on demand" only. They are only valid |
364 | * when the corresponding VALID_* bit in 'cache_valid' is set. */ | |
8b61709d BP |
365 | int ifindex; |
366 | uint8_t etheraddr[ETH_ADDR_LEN]; | |
f1acd62b | 367 | struct in_addr address, netmask; |
8b61709d BP |
368 | struct in6_addr in6; |
369 | int mtu; | |
370 | int carrier; | |
80a86fbe BP |
371 | uint32_t kbits_rate; /* Policing data. */ |
372 | uint32_t kbits_burst; | |
7fbef77a | 373 | bool have_vport_stats; |
c1c9c9c4 | 374 | struct tc *tc; |
149f577a JG |
375 | |
376 | union { | |
377 | struct tap_state tap; | |
378 | } state; | |
8b61709d BP |
379 | }; |
380 | ||
149f577a JG |
381 | struct netdev_linux { |
382 | struct netdev netdev; | |
5b7448ed | 383 | int fd; |
149f577a | 384 | }; |
8b61709d | 385 | |
76c308b5 BP |
386 | /* Sockets used for ioctl operations. */ |
387 | static int af_inet_sock = -1; /* AF_INET, SOCK_DGRAM. */ | |
8b61709d | 388 | |
ff4ed3c9 BP |
389 | /* A Netlink routing socket that is not subscribed to any multicast groups. */ |
390 | static struct nl_sock *rtnl_sock; | |
391 | ||
8b61709d BP |
392 | /* This is set pretty low because we probably won't learn anything from the |
393 | * additional log messages. */ | |
394 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
395 | ||
15b3596a | 396 | static int netdev_linux_init(void); |
6f643e49 | 397 | |
0b0544d7 | 398 | static int netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *, |
8b61709d | 399 | int cmd, const char *cmd_name); |
149f577a JG |
400 | static int netdev_linux_do_ioctl(const char *name, struct ifreq *, int cmd, |
401 | const char *cmd_name); | |
f1acd62b BP |
402 | static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *, |
403 | int cmd, const char *cmd_name); | |
8b61709d BP |
404 | static int get_flags(const struct netdev *, int *flagsp); |
405 | static int set_flags(struct netdev *, int flags); | |
406 | static int do_get_ifindex(const char *netdev_name); | |
407 | static int get_ifindex(const struct netdev *, int *ifindexp); | |
408 | static int do_set_addr(struct netdev *netdev, | |
409 | int ioctl_nr, const char *ioctl_name, | |
410 | struct in_addr addr); | |
411 | static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]); | |
412 | static int set_etheraddr(const char *netdev_name, int hwaddr_family, | |
413 | const uint8_t[ETH_ADDR_LEN]); | |
414 | static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats); | |
415 | static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats); | |
488d734d | 416 | static int af_packet_sock(void); |
1670c579 EJ |
417 | static void netdev_linux_miimon_run(void); |
418 | static void netdev_linux_miimon_wait(void); | |
8b61709d | 419 | |
15b3596a JG |
420 | static bool |
421 | is_netdev_linux_class(const struct netdev_class *netdev_class) | |
422 | { | |
423 | return netdev_class->init == netdev_linux_init; | |
424 | } | |
425 | ||
149f577a JG |
426 | static struct netdev_dev_linux * |
427 | netdev_dev_linux_cast(const struct netdev_dev *netdev_dev) | |
6c88d577 | 428 | { |
15b3596a JG |
429 | const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev); |
430 | assert(is_netdev_linux_class(netdev_class)); | |
431 | ||
149f577a | 432 | return CONTAINER_OF(netdev_dev, struct netdev_dev_linux, netdev_dev); |
6c88d577 JP |
433 | } |
434 | ||
8b61709d BP |
435 | static struct netdev_linux * |
436 | netdev_linux_cast(const struct netdev *netdev) | |
437 | { | |
15b3596a JG |
438 | struct netdev_dev *netdev_dev = netdev_get_dev(netdev); |
439 | const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev); | |
440 | assert(is_netdev_linux_class(netdev_class)); | |
441 | ||
8b61709d BP |
442 | return CONTAINER_OF(netdev, struct netdev_linux, netdev); |
443 | } | |
ff4ed3c9 | 444 | \f |
8b61709d BP |
445 | static int |
446 | netdev_linux_init(void) | |
447 | { | |
448 | static int status = -1; | |
449 | if (status < 0) { | |
ff4ed3c9 | 450 | /* Create AF_INET socket. */ |
8b61709d BP |
451 | af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0); |
452 | status = af_inet_sock >= 0 ? 0 : errno; | |
453 | if (status) { | |
454 | VLOG_ERR("failed to create inet socket: %s", strerror(status)); | |
455 | } | |
ff4ed3c9 BP |
456 | |
457 | /* Create rtnetlink socket. */ | |
458 | if (!status) { | |
cceb11f5 | 459 | status = nl_sock_create(NETLINK_ROUTE, &rtnl_sock); |
ff4ed3c9 BP |
460 | if (status) { |
461 | VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s", | |
462 | strerror(status)); | |
463 | } | |
464 | } | |
8b61709d BP |
465 | } |
466 | return status; | |
467 | } | |
468 | ||
469 | static void | |
470 | netdev_linux_run(void) | |
471 | { | |
18a23781 | 472 | rtnetlink_link_run(); |
1670c579 | 473 | netdev_linux_miimon_run(); |
8b61709d BP |
474 | } |
475 | ||
476 | static void | |
477 | netdev_linux_wait(void) | |
478 | { | |
18a23781 | 479 | rtnetlink_link_wait(); |
1670c579 | 480 | netdev_linux_miimon_wait(); |
8b61709d BP |
481 | } |
482 | ||
ac4d3bcb EJ |
483 | static void |
484 | netdev_dev_linux_changed(struct netdev_dev_linux *dev) | |
485 | { | |
486 | dev->change_seq++; | |
487 | if (!dev->change_seq) { | |
488 | dev->change_seq++; | |
489 | } | |
490 | dev->cache_valid = 0; | |
491 | } | |
492 | ||
8b61709d | 493 | static void |
21d6e22e | 494 | netdev_linux_cache_cb(const struct rtnetlink_link_change *change, |
67a4917b | 495 | void *aux OVS_UNUSED) |
8b61709d | 496 | { |
149f577a | 497 | struct netdev_dev_linux *dev; |
8b61709d | 498 | if (change) { |
46415c90 JG |
499 | struct netdev_dev *base_dev = netdev_dev_from_name(change->ifname); |
500 | if (base_dev) { | |
15b3596a JG |
501 | const struct netdev_class *netdev_class = |
502 | netdev_dev_get_class(base_dev); | |
503 | ||
504 | if (is_netdev_linux_class(netdev_class)) { | |
505 | dev = netdev_dev_linux_cast(base_dev); | |
ac4d3bcb | 506 | netdev_dev_linux_changed(dev); |
15b3596a | 507 | } |
8b61709d BP |
508 | } |
509 | } else { | |
46415c90 | 510 | struct shash device_shash; |
8b61709d | 511 | struct shash_node *node; |
46415c90 JG |
512 | |
513 | shash_init(&device_shash); | |
514 | netdev_dev_get_devices(&netdev_linux_class, &device_shash); | |
515 | SHASH_FOR_EACH (node, &device_shash) { | |
149f577a | 516 | dev = node->data; |
ac4d3bcb | 517 | netdev_dev_linux_changed(dev); |
8b61709d | 518 | } |
46415c90 | 519 | shash_destroy(&device_shash); |
8b61709d BP |
520 | } |
521 | } | |
522 | ||
c3827f61 | 523 | /* Creates system and internal devices. */ |
8b61709d | 524 | static int |
de5cdb90 BP |
525 | netdev_linux_create(const struct netdev_class *class, const char *name, |
526 | struct netdev_dev **netdev_devp) | |
6c88d577 | 527 | { |
149f577a JG |
528 | struct netdev_dev_linux *netdev_dev; |
529 | int error; | |
6c88d577 | 530 | |
46415c90 | 531 | if (!cache_notifier_refcount) { |
21d6e22e EJ |
532 | error = rtnetlink_link_notifier_register(&netdev_linux_cache_notifier, |
533 | netdev_linux_cache_cb, NULL); | |
149f577a JG |
534 | if (error) { |
535 | return error; | |
536 | } | |
537 | } | |
46415c90 | 538 | cache_notifier_refcount++; |
6c88d577 | 539 | |
149f577a | 540 | netdev_dev = xzalloc(sizeof *netdev_dev); |
ac4d3bcb | 541 | netdev_dev->change_seq = 1; |
de5cdb90 | 542 | netdev_dev_init(&netdev_dev->netdev_dev, name, class); |
46415c90 | 543 | |
149f577a | 544 | *netdev_devp = &netdev_dev->netdev_dev; |
a740f0de JG |
545 | return 0; |
546 | } | |
547 | ||
5b7448ed JG |
548 | /* For most types of netdevs we open the device for each call of |
549 | * netdev_open(). However, this is not the case with tap devices, | |
550 | * since it is only possible to open the device once. In this | |
551 | * situation we share a single file descriptor, and consequently | |
552 | * buffers, across all readers. Therefore once data is read it will | |
553 | * be unavailable to other reads for tap devices. */ | |
a740f0de | 554 | static int |
b8dcf5e9 | 555 | netdev_linux_create_tap(const struct netdev_class *class OVS_UNUSED, |
de5cdb90 | 556 | const char *name, struct netdev_dev **netdev_devp) |
a740f0de | 557 | { |
149f577a | 558 | struct netdev_dev_linux *netdev_dev; |
a740f0de JG |
559 | struct tap_state *state; |
560 | static const char tap_dev[] = "/dev/net/tun"; | |
561 | struct ifreq ifr; | |
562 | int error; | |
563 | ||
149f577a JG |
564 | netdev_dev = xzalloc(sizeof *netdev_dev); |
565 | state = &netdev_dev->state.tap; | |
a740f0de | 566 | |
6c88d577 | 567 | /* Open tap device. */ |
149f577a JG |
568 | state->fd = open(tap_dev, O_RDWR); |
569 | if (state->fd < 0) { | |
6c88d577 JP |
570 | error = errno; |
571 | VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error)); | |
572 | goto error; | |
573 | } | |
574 | ||
575 | /* Create tap device. */ | |
576 | ifr.ifr_flags = IFF_TAP | IFF_NO_PI; | |
71d7c22f | 577 | ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); |
149f577a | 578 | if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) { |
6c88d577 JP |
579 | VLOG_WARN("%s: creating tap device failed: %s", name, |
580 | strerror(errno)); | |
581 | error = errno; | |
582 | goto error; | |
583 | } | |
584 | ||
585 | /* Make non-blocking. */ | |
149f577a | 586 | error = set_nonblocking(state->fd); |
a740f0de JG |
587 | if (error) { |
588 | goto error; | |
589 | } | |
590 | ||
de5cdb90 | 591 | netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_tap_class); |
149f577a | 592 | *netdev_devp = &netdev_dev->netdev_dev; |
a740f0de JG |
593 | return 0; |
594 | ||
595 | error: | |
149f577a | 596 | free(netdev_dev); |
a740f0de JG |
597 | return error; |
598 | } | |
599 | ||
a740f0de | 600 | static void |
149f577a | 601 | destroy_tap(struct netdev_dev_linux *netdev_dev) |
a740f0de | 602 | { |
149f577a JG |
603 | struct tap_state *state = &netdev_dev->state.tap; |
604 | ||
605 | if (state->fd >= 0) { | |
606 | close(state->fd); | |
a740f0de JG |
607 | } |
608 | } | |
609 | ||
149f577a | 610 | /* Destroys the netdev device 'netdev_dev_'. */ |
6c88d577 | 611 | static void |
149f577a | 612 | netdev_linux_destroy(struct netdev_dev *netdev_dev_) |
6c88d577 | 613 | { |
149f577a | 614 | struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_); |
d2bb2799 | 615 | const struct netdev_class *class = netdev_dev_get_class(netdev_dev_); |
6c88d577 | 616 | |
c1c9c9c4 BP |
617 | if (netdev_dev->tc && netdev_dev->tc->ops->tc_destroy) { |
618 | netdev_dev->tc->ops->tc_destroy(netdev_dev->tc); | |
619 | } | |
620 | ||
d2bb2799 | 621 | if (class == &netdev_linux_class || class == &netdev_internal_class) { |
46415c90 | 622 | cache_notifier_refcount--; |
149f577a | 623 | |
46415c90 | 624 | if (!cache_notifier_refcount) { |
21d6e22e | 625 | rtnetlink_link_notifier_unregister(&netdev_linux_cache_notifier); |
149f577a | 626 | } |
d2bb2799 | 627 | } else if (class == &netdev_tap_class) { |
149f577a | 628 | destroy_tap(netdev_dev); |
d2bb2799 BP |
629 | } else { |
630 | NOT_REACHED(); | |
6c88d577 | 631 | } |
149f577a | 632 | |
658797c8 | 633 | free(netdev_dev); |
6c88d577 JP |
634 | } |
635 | ||
8b61709d | 636 | static int |
7b6b0ef4 | 637 | netdev_linux_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp) |
8b61709d | 638 | { |
5b7448ed | 639 | struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_); |
8b61709d BP |
640 | struct netdev_linux *netdev; |
641 | enum netdev_flags flags; | |
642 | int error; | |
643 | ||
644 | /* Allocate network device. */ | |
ec6fde61 | 645 | netdev = xzalloc(sizeof *netdev); |
49a6a163 | 646 | netdev->fd = -1; |
5b7448ed | 647 | netdev_init(&netdev->netdev, netdev_dev_); |
8b61709d | 648 | |
c3827f61 BP |
649 | /* Verify that the device really exists, by attempting to read its flags. |
650 | * (The flags might be cached, in which case this won't actually do an | |
651 | * ioctl.) | |
652 | * | |
653 | * Don't do this for "internal" netdevs, though, because those have to be | |
654 | * created as netdev objects before they exist in the kernel, because | |
655 | * creating them in the kernel happens by passing a netdev object to | |
656 | * dpif_port_add(). */ | |
657 | if (netdev_dev_get_class(netdev_dev_) != &netdev_internal_class) { | |
658 | error = netdev_get_flags(&netdev->netdev, &flags); | |
659 | if (error == ENODEV) { | |
660 | goto error; | |
661 | } | |
8b61709d BP |
662 | } |
663 | ||
61b999dd JG |
664 | if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap") && |
665 | !netdev_dev->state.tap.opened) { | |
666 | ||
667 | /* We assume that the first user of the tap device is the primary user | |
668 | * and give them the tap FD. Subsequent users probably just expect | |
669 | * this to be a system device so open it normally to avoid send/receive | |
670 | * directions appearing to be reversed. */ | |
5b7448ed | 671 | netdev->fd = netdev_dev->state.tap.fd; |
61b999dd | 672 | netdev_dev->state.tap.opened = true; |
8b61709d BP |
673 | } |
674 | ||
675 | *netdevp = &netdev->netdev; | |
676 | return 0; | |
677 | ||
678 | error: | |
149f577a | 679 | netdev_uninit(&netdev->netdev, true); |
8b61709d BP |
680 | return error; |
681 | } | |
682 | ||
683 | /* Closes and destroys 'netdev'. */ | |
684 | static void | |
685 | netdev_linux_close(struct netdev *netdev_) | |
686 | { | |
687 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
688 | ||
49a6a163 | 689 | if (netdev->fd > 0 && strcmp(netdev_get_type(netdev_), "tap")) { |
5b7448ed | 690 | close(netdev->fd); |
8b61709d BP |
691 | } |
692 | free(netdev); | |
693 | } | |
e9e28be3 | 694 | |
19993ef3 | 695 | /* Initializes 'sset' with a list of the names of all known network devices. */ |
8b61709d | 696 | static int |
19993ef3 | 697 | netdev_linux_enumerate(struct sset *sset) |
8b61709d BP |
698 | { |
699 | struct if_nameindex *names; | |
700 | ||
701 | names = if_nameindex(); | |
702 | if (names) { | |
703 | size_t i; | |
704 | ||
705 | for (i = 0; names[i].if_name != NULL; i++) { | |
19993ef3 | 706 | sset_add(sset, names[i].if_name); |
8b61709d BP |
707 | } |
708 | if_freenameindex(names); | |
709 | return 0; | |
710 | } else { | |
711 | VLOG_WARN("could not obtain list of network device names: %s", | |
712 | strerror(errno)); | |
713 | return errno; | |
714 | } | |
715 | } | |
716 | ||
7b6b0ef4 BP |
717 | static int |
718 | netdev_linux_listen(struct netdev *netdev_) | |
719 | { | |
720 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
721 | struct sockaddr_ll sll; | |
722 | int ifindex; | |
723 | int error; | |
724 | int fd; | |
725 | ||
726 | if (netdev->fd >= 0) { | |
727 | return 0; | |
728 | } | |
729 | ||
730 | /* Create file descriptor. */ | |
731 | fd = socket(PF_PACKET, SOCK_RAW, 0); | |
732 | if (fd < 0) { | |
733 | error = errno; | |
734 | VLOG_ERR("failed to create raw socket (%s)", strerror(error)); | |
735 | goto error; | |
736 | } | |
737 | ||
738 | /* Set non-blocking mode. */ | |
739 | error = set_nonblocking(fd); | |
740 | if (error) { | |
741 | goto error; | |
742 | } | |
743 | ||
744 | /* Get ethernet device index. */ | |
745 | error = get_ifindex(&netdev->netdev, &ifindex); | |
746 | if (error) { | |
747 | goto error; | |
748 | } | |
749 | ||
750 | /* Bind to specific ethernet device. */ | |
751 | memset(&sll, 0, sizeof sll); | |
752 | sll.sll_family = AF_PACKET; | |
753 | sll.sll_ifindex = ifindex; | |
754 | sll.sll_protocol = (OVS_FORCE unsigned short int) htons(ETH_P_ALL); | |
755 | if (bind(fd, (struct sockaddr *) &sll, sizeof sll) < 0) { | |
756 | error = errno; | |
757 | VLOG_ERR("%s: failed to bind raw socket (%s)", | |
758 | netdev_get_name(netdev_), strerror(error)); | |
759 | goto error; | |
760 | } | |
761 | ||
762 | netdev->fd = fd; | |
763 | return 0; | |
764 | ||
765 | error: | |
766 | if (fd >= 0) { | |
767 | close(fd); | |
768 | } | |
769 | return error; | |
770 | } | |
771 | ||
8b61709d BP |
772 | static int |
773 | netdev_linux_recv(struct netdev *netdev_, void *data, size_t size) | |
774 | { | |
775 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
776 | ||
5b7448ed | 777 | if (netdev->fd < 0) { |
7b6b0ef4 | 778 | /* Device is not listening. */ |
c0e5f6ca | 779 | return -EAGAIN; |
8b61709d BP |
780 | } |
781 | ||
782 | for (;;) { | |
5b7448ed | 783 | ssize_t retval = read(netdev->fd, data, size); |
8b61709d BP |
784 | if (retval >= 0) { |
785 | return retval; | |
786 | } else if (errno != EINTR) { | |
787 | if (errno != EAGAIN) { | |
788 | VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s", | |
789 | strerror(errno), netdev_get_name(netdev_)); | |
790 | } | |
c0e5f6ca | 791 | return -errno; |
8b61709d BP |
792 | } |
793 | } | |
794 | } | |
795 | ||
796 | /* Registers with the poll loop to wake up from the next call to poll_block() | |
797 | * when a packet is ready to be received with netdev_recv() on 'netdev'. */ | |
798 | static void | |
799 | netdev_linux_recv_wait(struct netdev *netdev_) | |
800 | { | |
801 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
5b7448ed JG |
802 | if (netdev->fd >= 0) { |
803 | poll_fd_wait(netdev->fd, POLLIN); | |
8b61709d BP |
804 | } |
805 | } | |
806 | ||
807 | /* Discards all packets waiting to be received from 'netdev'. */ | |
808 | static int | |
809 | netdev_linux_drain(struct netdev *netdev_) | |
810 | { | |
811 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
5b7448ed | 812 | if (netdev->fd < 0) { |
8b61709d | 813 | return 0; |
5b7448ed | 814 | } else if (!strcmp(netdev_get_type(netdev_), "tap")) { |
8b61709d | 815 | struct ifreq ifr; |
149f577a | 816 | int error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr, |
8b61709d BP |
817 | SIOCGIFTXQLEN, "SIOCGIFTXQLEN"); |
818 | if (error) { | |
819 | return error; | |
820 | } | |
5b7448ed | 821 | drain_fd(netdev->fd, ifr.ifr_qlen); |
8b61709d BP |
822 | return 0; |
823 | } else { | |
5b7448ed | 824 | return drain_rcvbuf(netdev->fd); |
8b61709d BP |
825 | } |
826 | } | |
827 | ||
828 | /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive | |
829 | * errno value. Returns EAGAIN without blocking if the packet cannot be queued | |
830 | * immediately. Returns EMSGSIZE if a partial packet was transmitted or if | |
831 | * the packet is too big or too small to transmit on the device. | |
832 | * | |
833 | * The caller retains ownership of 'buffer' in all cases. | |
834 | * | |
835 | * The kernel maintains a packet transmission queue, so the caller is not | |
836 | * expected to do additional queuing of packets. */ | |
837 | static int | |
838 | netdev_linux_send(struct netdev *netdev_, const void *data, size_t size) | |
839 | { | |
f23347ea BP |
840 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); |
841 | for (;;) { | |
842 | ssize_t retval; | |
8b61709d | 843 | |
f23347ea BP |
844 | if (netdev->fd < 0) { |
845 | /* Use our AF_PACKET socket to send to this device. */ | |
846 | struct sockaddr_ll sll; | |
847 | struct msghdr msg; | |
848 | struct iovec iov; | |
849 | int ifindex; | |
850 | int error; | |
488d734d BP |
851 | int sock; |
852 | ||
853 | sock = af_packet_sock(); | |
854 | if (sock < 0) { | |
855 | return sock; | |
856 | } | |
f23347ea BP |
857 | |
858 | error = get_ifindex(netdev_, &ifindex); | |
859 | if (error) { | |
860 | return error; | |
861 | } | |
8b61709d | 862 | |
f23347ea BP |
863 | /* We don't bother setting most fields in sockaddr_ll because the |
864 | * kernel ignores them for SOCK_RAW. */ | |
865 | memset(&sll, 0, sizeof sll); | |
866 | sll.sll_family = AF_PACKET; | |
867 | sll.sll_ifindex = ifindex; | |
76c308b5 | 868 | |
f23347ea BP |
869 | iov.iov_base = (void *) data; |
870 | iov.iov_len = size; | |
76c308b5 | 871 | |
f23347ea BP |
872 | msg.msg_name = &sll; |
873 | msg.msg_namelen = sizeof sll; | |
874 | msg.msg_iov = &iov; | |
875 | msg.msg_iovlen = 1; | |
876 | msg.msg_control = NULL; | |
877 | msg.msg_controllen = 0; | |
878 | msg.msg_flags = 0; | |
879 | ||
488d734d | 880 | retval = sendmsg(sock, &msg, 0); |
f23347ea BP |
881 | } else { |
882 | /* Use the netdev's own fd to send to this device. This is | |
883 | * essential for tap devices, because packets sent to a tap device | |
884 | * with an AF_PACKET socket will loop back to be *received* again | |
885 | * on the tap device. */ | |
886 | retval = write(netdev->fd, data, size); | |
887 | } | |
76c308b5 | 888 | |
8b61709d BP |
889 | if (retval < 0) { |
890 | /* The Linux AF_PACKET implementation never blocks waiting for room | |
891 | * for packets, instead returning ENOBUFS. Translate this into | |
892 | * EAGAIN for the caller. */ | |
893 | if (errno == ENOBUFS) { | |
894 | return EAGAIN; | |
895 | } else if (errno == EINTR) { | |
896 | continue; | |
897 | } else if (errno != EAGAIN) { | |
898 | VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s", | |
899 | netdev_get_name(netdev_), strerror(errno)); | |
900 | } | |
901 | return errno; | |
902 | } else if (retval != size) { | |
903 | VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of " | |
904 | "%zu) on %s", retval, size, netdev_get_name(netdev_)); | |
905 | return EMSGSIZE; | |
906 | } else { | |
907 | return 0; | |
908 | } | |
909 | } | |
910 | } | |
911 | ||
912 | /* Registers with the poll loop to wake up from the next call to poll_block() | |
913 | * when the packet transmission queue has sufficient room to transmit a packet | |
914 | * with netdev_send(). | |
915 | * | |
916 | * The kernel maintains a packet transmission queue, so the client is not | |
917 | * expected to do additional queuing of packets. Thus, this function is | |
918 | * unlikely to ever be used. It is included for completeness. */ | |
919 | static void | |
920 | netdev_linux_send_wait(struct netdev *netdev_) | |
921 | { | |
922 | struct netdev_linux *netdev = netdev_linux_cast(netdev_); | |
5b7448ed | 923 | if (netdev->fd < 0) { |
8b61709d | 924 | /* Nothing to do. */ |
5b7448ed JG |
925 | } else if (strcmp(netdev_get_type(netdev_), "tap")) { |
926 | poll_fd_wait(netdev->fd, POLLOUT); | |
8b61709d BP |
927 | } else { |
928 | /* TAP device always accepts packets.*/ | |
929 | poll_immediate_wake(); | |
930 | } | |
931 | } | |
932 | ||
933 | /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful, | |
934 | * otherwise a positive errno value. */ | |
935 | static int | |
936 | netdev_linux_set_etheraddr(struct netdev *netdev_, | |
937 | const uint8_t mac[ETH_ADDR_LEN]) | |
938 | { | |
149f577a JG |
939 | struct netdev_dev_linux *netdev_dev = |
940 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
eb395f2e BP |
941 | int error; |
942 | ||
149f577a JG |
943 | if (!(netdev_dev->cache_valid & VALID_ETHERADDR) |
944 | || !eth_addr_equals(netdev_dev->etheraddr, mac)) { | |
eb395f2e BP |
945 | error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac); |
946 | if (!error) { | |
149f577a JG |
947 | netdev_dev->cache_valid |= VALID_ETHERADDR; |
948 | memcpy(netdev_dev->etheraddr, mac, ETH_ADDR_LEN); | |
eb395f2e BP |
949 | } |
950 | } else { | |
951 | error = 0; | |
8b61709d BP |
952 | } |
953 | return error; | |
954 | } | |
955 | ||
956 | /* Returns a pointer to 'netdev''s MAC address. The caller must not modify or | |
957 | * free the returned buffer. */ | |
958 | static int | |
959 | netdev_linux_get_etheraddr(const struct netdev *netdev_, | |
960 | uint8_t mac[ETH_ADDR_LEN]) | |
961 | { | |
149f577a JG |
962 | struct netdev_dev_linux *netdev_dev = |
963 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
964 | if (!(netdev_dev->cache_valid & VALID_ETHERADDR)) { | |
8b61709d | 965 | int error = get_etheraddr(netdev_get_name(netdev_), |
149f577a | 966 | netdev_dev->etheraddr); |
8b61709d BP |
967 | if (error) { |
968 | return error; | |
969 | } | |
149f577a | 970 | netdev_dev->cache_valid |= VALID_ETHERADDR; |
8b61709d | 971 | } |
149f577a | 972 | memcpy(mac, netdev_dev->etheraddr, ETH_ADDR_LEN); |
8b61709d BP |
973 | return 0; |
974 | } | |
975 | ||
976 | /* Returns the maximum size of transmitted (and received) packets on 'netdev', | |
977 | * in bytes, not including the hardware header; thus, this is typically 1500 | |
978 | * bytes for Ethernet devices. */ | |
979 | static int | |
980 | netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup) | |
981 | { | |
149f577a JG |
982 | struct netdev_dev_linux *netdev_dev = |
983 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
984 | if (!(netdev_dev->cache_valid & VALID_MTU)) { | |
8b61709d BP |
985 | struct ifreq ifr; |
986 | int error; | |
987 | ||
149f577a JG |
988 | error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr, |
989 | SIOCGIFMTU, "SIOCGIFMTU"); | |
8b61709d BP |
990 | if (error) { |
991 | return error; | |
992 | } | |
149f577a JG |
993 | netdev_dev->mtu = ifr.ifr_mtu; |
994 | netdev_dev->cache_valid |= VALID_MTU; | |
8b61709d | 995 | } |
149f577a | 996 | *mtup = netdev_dev->mtu; |
8b61709d BP |
997 | return 0; |
998 | } | |
999 | ||
9b020780 PS |
1000 | /* Sets the maximum size of transmitted (MTU) for given device using linux |
1001 | * networking ioctl interface. | |
1002 | */ | |
1003 | static int | |
1004 | netdev_linux_set_mtu(const struct netdev *netdev_, int mtu) | |
1005 | { | |
1006 | struct netdev_dev_linux *netdev_dev = | |
1007 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
1008 | struct ifreq ifr; | |
1009 | int error; | |
1010 | ||
1011 | ifr.ifr_mtu = mtu; | |
1012 | error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr, | |
1013 | SIOCSIFMTU, "SIOCSIFMTU"); | |
1014 | if (error) { | |
1015 | return error; | |
1016 | } | |
1017 | ||
1018 | netdev_dev->mtu = ifr.ifr_mtu; | |
1019 | netdev_dev->cache_valid |= VALID_MTU; | |
1020 | return 0; | |
1021 | } | |
1022 | ||
9ab3d9a3 BP |
1023 | /* Returns the ifindex of 'netdev', if successful, as a positive number. |
1024 | * On failure, returns a negative errno value. */ | |
1025 | static int | |
1026 | netdev_linux_get_ifindex(const struct netdev *netdev) | |
1027 | { | |
1028 | int ifindex, error; | |
1029 | ||
1030 | error = get_ifindex(netdev, &ifindex); | |
1031 | return error ? -error : ifindex; | |
1032 | } | |
1033 | ||
8b61709d BP |
1034 | static int |
1035 | netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier) | |
1036 | { | |
149f577a JG |
1037 | struct netdev_dev_linux *netdev_dev = |
1038 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
8b61709d BP |
1039 | int error = 0; |
1040 | char *fn = NULL; | |
1041 | int fd = -1; | |
1042 | ||
1670c579 EJ |
1043 | if (netdev_dev->miimon_interval > 0) { |
1044 | *carrier = netdev_dev->miimon; | |
1045 | return 0; | |
1046 | } | |
1047 | ||
149f577a | 1048 | if (!(netdev_dev->cache_valid & VALID_CARRIER)) { |
8b61709d BP |
1049 | char line[8]; |
1050 | int retval; | |
1051 | ||
149f577a JG |
1052 | fn = xasprintf("/sys/class/net/%s/carrier", |
1053 | netdev_get_name(netdev_)); | |
8b61709d BP |
1054 | fd = open(fn, O_RDONLY); |
1055 | if (fd < 0) { | |
1056 | error = errno; | |
1057 | VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(error)); | |
1058 | goto exit; | |
1059 | } | |
1060 | ||
1061 | retval = read(fd, line, sizeof line); | |
1062 | if (retval < 0) { | |
1063 | error = errno; | |
1064 | if (error == EINVAL) { | |
1065 | /* This is the normal return value when we try to check carrier | |
1066 | * if the network device is not up. */ | |
1067 | } else { | |
1068 | VLOG_WARN_RL(&rl, "%s: read failed: %s", fn, strerror(error)); | |
1069 | } | |
1070 | goto exit; | |
1071 | } else if (retval == 0) { | |
1072 | error = EPROTO; | |
1073 | VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn); | |
1074 | goto exit; | |
1075 | } | |
1076 | ||
1077 | if (line[0] != '0' && line[0] != '1') { | |
1078 | error = EPROTO; | |
1079 | VLOG_WARN_RL(&rl, "%s: value is %c (expected 0 or 1)", | |
1080 | fn, line[0]); | |
1081 | goto exit; | |
1082 | } | |
149f577a JG |
1083 | netdev_dev->carrier = line[0] != '0'; |
1084 | netdev_dev->cache_valid |= VALID_CARRIER; | |
8b61709d | 1085 | } |
149f577a | 1086 | *carrier = netdev_dev->carrier; |
8b61709d BP |
1087 | error = 0; |
1088 | ||
1089 | exit: | |
1090 | if (fd >= 0) { | |
1091 | close(fd); | |
1092 | } | |
1093 | free(fn); | |
1094 | return error; | |
1095 | } | |
1096 | ||
63331829 | 1097 | static int |
1670c579 EJ |
1098 | netdev_linux_do_miimon(const char *name, int cmd, const char *cmd_name, |
1099 | struct mii_ioctl_data *data) | |
63331829 | 1100 | { |
63331829 | 1101 | struct ifreq ifr; |
782e6111 | 1102 | int error; |
63331829 | 1103 | |
63331829 | 1104 | memset(&ifr, 0, sizeof ifr); |
782e6111 | 1105 | memcpy(&ifr.ifr_data, data, sizeof *data); |
1670c579 | 1106 | error = netdev_linux_do_ioctl(name, &ifr, cmd, cmd_name); |
782e6111 | 1107 | memcpy(data, &ifr.ifr_data, sizeof *data); |
63331829 | 1108 | |
782e6111 EJ |
1109 | return error; |
1110 | } | |
1111 | ||
1112 | static int | |
1670c579 | 1113 | netdev_linux_get_miimon(const char *name, bool *miimon) |
782e6111 | 1114 | { |
782e6111 EJ |
1115 | struct mii_ioctl_data data; |
1116 | int error; | |
63331829 | 1117 | |
782e6111 EJ |
1118 | *miimon = false; |
1119 | ||
1120 | memset(&data, 0, sizeof data); | |
1670c579 | 1121 | error = netdev_linux_do_miimon(name, SIOCGMIIPHY, "SIOCGMIIPHY", &data); |
782e6111 EJ |
1122 | if (!error) { |
1123 | /* data.phy_id is filled out by previous SIOCGMIIPHY miimon call. */ | |
1124 | data.reg_num = MII_BMSR; | |
1670c579 | 1125 | error = netdev_linux_do_miimon(name, SIOCGMIIREG, "SIOCGMIIREG", |
782e6111 | 1126 | &data); |
63331829 EJ |
1127 | |
1128 | if (!error) { | |
782e6111 | 1129 | *miimon = !!(data.val_out & BMSR_LSTATUS); |
63331829 EJ |
1130 | } else { |
1131 | VLOG_WARN_RL(&rl, "%s: failed to query MII", name); | |
1132 | } | |
1133 | } else { | |
1134 | struct ethtool_cmd ecmd; | |
63331829 EJ |
1135 | |
1136 | VLOG_DBG_RL(&rl, "%s: failed to query MII, falling back to ethtool", | |
1137 | name); | |
1138 | ||
1139 | memset(&ecmd, 0, sizeof ecmd); | |
1140 | error = netdev_linux_do_ethtool(name, &ecmd, ETHTOOL_GLINK, | |
1141 | "ETHTOOL_GLINK"); | |
1142 | if (!error) { | |
782e6111 EJ |
1143 | struct ethtool_value eval; |
1144 | ||
1145 | memcpy(&eval, &ecmd, sizeof eval); | |
1146 | *miimon = !!eval.data; | |
63331829 EJ |
1147 | } else { |
1148 | VLOG_WARN_RL(&rl, "%s: ethtool link status failed", name); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | return error; | |
1153 | } | |
1154 | ||
1670c579 EJ |
1155 | static int |
1156 | netdev_linux_set_miimon_interval(struct netdev *netdev_, | |
1157 | long long int interval) | |
1158 | { | |
1159 | struct netdev_dev_linux *netdev_dev; | |
1160 | ||
1161 | netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
1162 | ||
1163 | interval = interval > 0 ? MAX(interval, 100) : 0; | |
1164 | if (netdev_dev->miimon_interval != interval) { | |
1165 | netdev_dev->miimon_interval = interval; | |
1166 | timer_set_expired(&netdev_dev->miimon_timer); | |
1167 | } | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static void | |
1173 | netdev_linux_miimon_run(void) | |
1174 | { | |
1175 | struct shash device_shash; | |
1176 | struct shash_node *node; | |
1177 | ||
1178 | shash_init(&device_shash); | |
1179 | netdev_dev_get_devices(&netdev_linux_class, &device_shash); | |
1180 | SHASH_FOR_EACH (node, &device_shash) { | |
1181 | struct netdev_dev_linux *dev = node->data; | |
1182 | bool miimon; | |
1183 | ||
1184 | if (dev->miimon_interval <= 0 || !timer_expired(&dev->miimon_timer)) { | |
1185 | continue; | |
1186 | } | |
1187 | ||
1188 | netdev_linux_get_miimon(dev->netdev_dev.name, &miimon); | |
1189 | if (miimon != dev->miimon) { | |
1670c579 | 1190 | dev->miimon = miimon; |
ac4d3bcb | 1191 | netdev_dev_linux_changed(dev); |
1670c579 EJ |
1192 | } |
1193 | ||
1194 | timer_set_duration(&dev->miimon_timer, dev->miimon_interval); | |
1195 | } | |
1196 | ||
1197 | shash_destroy(&device_shash); | |
1198 | } | |
1199 | ||
1200 | static void | |
1201 | netdev_linux_miimon_wait(void) | |
1202 | { | |
1203 | struct shash device_shash; | |
1204 | struct shash_node *node; | |
1205 | ||
1206 | shash_init(&device_shash); | |
1207 | netdev_dev_get_devices(&netdev_linux_class, &device_shash); | |
1208 | SHASH_FOR_EACH (node, &device_shash) { | |
1209 | struct netdev_dev_linux *dev = node->data; | |
1210 | ||
1211 | if (dev->miimon_interval > 0) { | |
1212 | timer_wait(&dev->miimon_timer); | |
1213 | } | |
1214 | } | |
1215 | shash_destroy(&device_shash); | |
1216 | } | |
1217 | ||
8b61709d BP |
1218 | /* Check whether we can we use RTM_GETLINK to get network device statistics. |
1219 | * In pre-2.6.19 kernels, this was only available if wireless extensions were | |
1220 | * enabled. */ | |
1221 | static bool | |
1222 | check_for_working_netlink_stats(void) | |
1223 | { | |
1224 | /* Decide on the netdev_get_stats() implementation to use. Netlink is | |
1225 | * preferable, so if that works, we'll use it. */ | |
1226 | int ifindex = do_get_ifindex("lo"); | |
1227 | if (ifindex < 0) { | |
1228 | VLOG_WARN("failed to get ifindex for lo, " | |
1229 | "obtaining netdev stats from proc"); | |
1230 | return false; | |
1231 | } else { | |
1232 | struct netdev_stats stats; | |
1233 | int error = get_stats_via_netlink(ifindex, &stats); | |
1234 | if (!error) { | |
1235 | VLOG_DBG("obtaining netdev stats via rtnetlink"); | |
1236 | return true; | |
1237 | } else { | |
1238 | VLOG_INFO("RTM_GETLINK failed (%s), obtaining netdev stats " | |
1239 | "via proc (you are probably running a pre-2.6.19 " | |
1240 | "kernel)", strerror(error)); | |
1241 | return false; | |
1242 | } | |
1243 | } | |
1244 | } | |
1245 | ||
92df599c JG |
1246 | static void |
1247 | swap_uint64(uint64_t *a, uint64_t *b) | |
1248 | { | |
1de0e8ae BP |
1249 | uint64_t tmp = *a; |
1250 | *a = *b; | |
1251 | *b = tmp; | |
92df599c JG |
1252 | } |
1253 | ||
f613a0d7 PS |
1254 | static void |
1255 | get_stats_via_vport(const struct netdev *netdev_, | |
1256 | struct netdev_stats *stats) | |
8b61709d | 1257 | { |
149f577a JG |
1258 | struct netdev_dev_linux *netdev_dev = |
1259 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
8b61709d | 1260 | |
7fbef77a JG |
1261 | if (netdev_dev->have_vport_stats || |
1262 | !(netdev_dev->cache_valid & VALID_HAVE_VPORT_STATS)) { | |
f613a0d7 | 1263 | int error; |
7fbef77a JG |
1264 | |
1265 | error = netdev_vport_get_stats(netdev_, stats); | |
f613a0d7 PS |
1266 | if (error) { |
1267 | VLOG_WARN_RL(&rl, "%s: obtaining netdev stats via vport failed %d", | |
1268 | netdev_get_name(netdev_), error); | |
1269 | } | |
7fbef77a JG |
1270 | netdev_dev->have_vport_stats = !error; |
1271 | netdev_dev->cache_valid |= VALID_HAVE_VPORT_STATS; | |
8b61709d | 1272 | } |
f613a0d7 | 1273 | } |
8b61709d | 1274 | |
f613a0d7 PS |
1275 | static int |
1276 | netdev_linux_sys_get_stats(const struct netdev *netdev_, | |
1277 | struct netdev_stats *stats) | |
1278 | { | |
1279 | static int use_netlink_stats = -1; | |
1280 | int error; | |
1281 | ||
1282 | if (use_netlink_stats < 0) { | |
1283 | use_netlink_stats = check_for_working_netlink_stats(); | |
1284 | } | |
1285 | ||
1286 | if (use_netlink_stats) { | |
1287 | int ifindex; | |
1288 | ||
1289 | error = get_ifindex(netdev_, &ifindex); | |
1290 | if (!error) { | |
1291 | error = get_stats_via_netlink(ifindex, stats); | |
7fbef77a | 1292 | } |
f613a0d7 PS |
1293 | } else { |
1294 | error = get_stats_via_proc(netdev_get_name(netdev_), stats); | |
1295 | } | |
7fbef77a | 1296 | |
f613a0d7 PS |
1297 | if (error) { |
1298 | VLOG_WARN_RL(&rl, "%s: linux-sys get stats failed %d", | |
1299 | netdev_get_name(netdev_), error); | |
1300 | } | |
1301 | return error; | |
1302 | ||
1303 | } | |
1304 | ||
1305 | /* Retrieves current device stats for 'netdev-linux'. */ | |
1306 | static int | |
1307 | netdev_linux_get_stats(const struct netdev *netdev_, | |
1308 | struct netdev_stats *stats) | |
1309 | { | |
1310 | struct netdev_dev_linux *netdev_dev = | |
1311 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
1312 | struct netdev_stats dev_stats; | |
1313 | int error; | |
1314 | ||
1315 | get_stats_via_vport(netdev_, stats); | |
1316 | ||
1317 | error = netdev_linux_sys_get_stats(netdev_, &dev_stats); | |
1318 | ||
1319 | if (error) { | |
1320 | if (!netdev_dev->have_vport_stats) { | |
1321 | return error; | |
7fbef77a | 1322 | } else { |
f613a0d7 PS |
1323 | return 0; |
1324 | } | |
1325 | } | |
1326 | ||
1327 | if (!netdev_dev->have_vport_stats) { | |
1328 | /* stats not available from OVS then use ioctl stats. */ | |
1329 | *stats = dev_stats; | |
1330 | } else { | |
1331 | stats->rx_errors += dev_stats.rx_errors; | |
1332 | stats->tx_errors += dev_stats.tx_errors; | |
1333 | stats->rx_dropped += dev_stats.rx_dropped; | |
1334 | stats->tx_dropped += dev_stats.tx_dropped; | |
1335 | stats->multicast += dev_stats.multicast; | |
1336 | stats->collisions += dev_stats.collisions; | |
1337 | stats->rx_length_errors += dev_stats.rx_length_errors; | |
1338 | stats->rx_over_errors += dev_stats.rx_over_errors; | |
1339 | stats->rx_crc_errors += dev_stats.rx_crc_errors; | |
1340 | stats->rx_frame_errors += dev_stats.rx_frame_errors; | |
1341 | stats->rx_fifo_errors += dev_stats.rx_fifo_errors; | |
1342 | stats->rx_missed_errors += dev_stats.rx_missed_errors; | |
1343 | stats->tx_aborted_errors += dev_stats.tx_aborted_errors; | |
1344 | stats->tx_carrier_errors += dev_stats.tx_carrier_errors; | |
1345 | stats->tx_fifo_errors += dev_stats.tx_fifo_errors; | |
1346 | stats->tx_heartbeat_errors += dev_stats.tx_heartbeat_errors; | |
1347 | stats->tx_window_errors += dev_stats.tx_window_errors; | |
1348 | } | |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | /* Retrieves current device stats for 'netdev-tap' netdev or | |
1353 | * netdev-internal. */ | |
1354 | static int | |
1355 | netdev_pseudo_get_stats(const struct netdev *netdev_, | |
1356 | struct netdev_stats *stats) | |
1357 | { | |
1358 | struct netdev_dev_linux *netdev_dev = | |
1359 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
1360 | struct netdev_stats dev_stats; | |
1361 | int error; | |
1362 | ||
1363 | get_stats_via_vport(netdev_, stats); | |
1364 | ||
1365 | error = netdev_linux_sys_get_stats(netdev_, &dev_stats); | |
1366 | if (error) { | |
1367 | if (!netdev_dev->have_vport_stats) { | |
1368 | return error; | |
1369 | } else { | |
1370 | return 0; | |
8b61709d | 1371 | } |
8b61709d | 1372 | } |
fe6b0e03 JG |
1373 | |
1374 | /* If this port is an internal port then the transmit and receive stats | |
1375 | * will appear to be swapped relative to the other ports since we are the | |
1376 | * one sending the data, not a remote computer. For consistency, we swap | |
7fbef77a JG |
1377 | * them back here. This does not apply if we are getting stats from the |
1378 | * vport layer because it always tracks stats from the perspective of the | |
1379 | * switch. */ | |
f613a0d7 PS |
1380 | if (!netdev_dev->have_vport_stats) { |
1381 | *stats = dev_stats; | |
92df599c JG |
1382 | swap_uint64(&stats->rx_packets, &stats->tx_packets); |
1383 | swap_uint64(&stats->rx_bytes, &stats->tx_bytes); | |
1384 | swap_uint64(&stats->rx_errors, &stats->tx_errors); | |
1385 | swap_uint64(&stats->rx_dropped, &stats->tx_dropped); | |
fe6b0e03 JG |
1386 | stats->rx_length_errors = 0; |
1387 | stats->rx_over_errors = 0; | |
1388 | stats->rx_crc_errors = 0; | |
1389 | stats->rx_frame_errors = 0; | |
1390 | stats->rx_fifo_errors = 0; | |
1391 | stats->rx_missed_errors = 0; | |
1392 | stats->tx_aborted_errors = 0; | |
1393 | stats->tx_carrier_errors = 0; | |
1394 | stats->tx_fifo_errors = 0; | |
1395 | stats->tx_heartbeat_errors = 0; | |
1396 | stats->tx_window_errors = 0; | |
f613a0d7 PS |
1397 | } else { |
1398 | stats->rx_dropped += dev_stats.tx_dropped; | |
1399 | stats->tx_dropped += dev_stats.rx_dropped; | |
fe6b0e03 | 1400 | |
f613a0d7 PS |
1401 | stats->rx_errors += dev_stats.tx_errors; |
1402 | stats->tx_errors += dev_stats.rx_errors; | |
1403 | ||
1404 | stats->multicast += dev_stats.multicast; | |
1405 | stats->collisions += dev_stats.collisions; | |
1406 | } | |
1407 | return 0; | |
8b61709d BP |
1408 | } |
1409 | ||
1410 | /* Stores the features supported by 'netdev' into each of '*current', | |
1411 | * '*advertised', '*supported', and '*peer' that are non-null. Each value is a | |
1412 | * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if | |
7671589a | 1413 | * successful, otherwise a positive errno value. */ |
8b61709d | 1414 | static int |
6f2f5cce | 1415 | netdev_linux_get_features(const struct netdev *netdev, |
8b61709d BP |
1416 | uint32_t *current, uint32_t *advertised, |
1417 | uint32_t *supported, uint32_t *peer) | |
1418 | { | |
1419 | struct ethtool_cmd ecmd; | |
1420 | int error; | |
1421 | ||
1422 | memset(&ecmd, 0, sizeof ecmd); | |
0b0544d7 | 1423 | error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, |
8b61709d BP |
1424 | ETHTOOL_GSET, "ETHTOOL_GSET"); |
1425 | if (error) { | |
1426 | return error; | |
1427 | } | |
1428 | ||
1429 | /* Supported features. */ | |
1430 | *supported = 0; | |
1431 | if (ecmd.supported & SUPPORTED_10baseT_Half) { | |
1432 | *supported |= OFPPF_10MB_HD; | |
1433 | } | |
1434 | if (ecmd.supported & SUPPORTED_10baseT_Full) { | |
1435 | *supported |= OFPPF_10MB_FD; | |
1436 | } | |
1437 | if (ecmd.supported & SUPPORTED_100baseT_Half) { | |
1438 | *supported |= OFPPF_100MB_HD; | |
1439 | } | |
1440 | if (ecmd.supported & SUPPORTED_100baseT_Full) { | |
1441 | *supported |= OFPPF_100MB_FD; | |
1442 | } | |
1443 | if (ecmd.supported & SUPPORTED_1000baseT_Half) { | |
1444 | *supported |= OFPPF_1GB_HD; | |
1445 | } | |
1446 | if (ecmd.supported & SUPPORTED_1000baseT_Full) { | |
1447 | *supported |= OFPPF_1GB_FD; | |
1448 | } | |
1449 | if (ecmd.supported & SUPPORTED_10000baseT_Full) { | |
1450 | *supported |= OFPPF_10GB_FD; | |
1451 | } | |
1452 | if (ecmd.supported & SUPPORTED_TP) { | |
1453 | *supported |= OFPPF_COPPER; | |
1454 | } | |
1455 | if (ecmd.supported & SUPPORTED_FIBRE) { | |
1456 | *supported |= OFPPF_FIBER; | |
1457 | } | |
1458 | if (ecmd.supported & SUPPORTED_Autoneg) { | |
1459 | *supported |= OFPPF_AUTONEG; | |
1460 | } | |
1461 | if (ecmd.supported & SUPPORTED_Pause) { | |
1462 | *supported |= OFPPF_PAUSE; | |
1463 | } | |
1464 | if (ecmd.supported & SUPPORTED_Asym_Pause) { | |
1465 | *supported |= OFPPF_PAUSE_ASYM; | |
1466 | } | |
1467 | ||
1468 | /* Advertised features. */ | |
1469 | *advertised = 0; | |
1470 | if (ecmd.advertising & ADVERTISED_10baseT_Half) { | |
1471 | *advertised |= OFPPF_10MB_HD; | |
1472 | } | |
1473 | if (ecmd.advertising & ADVERTISED_10baseT_Full) { | |
1474 | *advertised |= OFPPF_10MB_FD; | |
1475 | } | |
1476 | if (ecmd.advertising & ADVERTISED_100baseT_Half) { | |
1477 | *advertised |= OFPPF_100MB_HD; | |
1478 | } | |
1479 | if (ecmd.advertising & ADVERTISED_100baseT_Full) { | |
1480 | *advertised |= OFPPF_100MB_FD; | |
1481 | } | |
1482 | if (ecmd.advertising & ADVERTISED_1000baseT_Half) { | |
1483 | *advertised |= OFPPF_1GB_HD; | |
1484 | } | |
1485 | if (ecmd.advertising & ADVERTISED_1000baseT_Full) { | |
1486 | *advertised |= OFPPF_1GB_FD; | |
1487 | } | |
1488 | if (ecmd.advertising & ADVERTISED_10000baseT_Full) { | |
1489 | *advertised |= OFPPF_10GB_FD; | |
1490 | } | |
1491 | if (ecmd.advertising & ADVERTISED_TP) { | |
1492 | *advertised |= OFPPF_COPPER; | |
1493 | } | |
1494 | if (ecmd.advertising & ADVERTISED_FIBRE) { | |
1495 | *advertised |= OFPPF_FIBER; | |
1496 | } | |
1497 | if (ecmd.advertising & ADVERTISED_Autoneg) { | |
1498 | *advertised |= OFPPF_AUTONEG; | |
1499 | } | |
1500 | if (ecmd.advertising & ADVERTISED_Pause) { | |
1501 | *advertised |= OFPPF_PAUSE; | |
1502 | } | |
1503 | if (ecmd.advertising & ADVERTISED_Asym_Pause) { | |
1504 | *advertised |= OFPPF_PAUSE_ASYM; | |
1505 | } | |
1506 | ||
1507 | /* Current settings. */ | |
1508 | if (ecmd.speed == SPEED_10) { | |
1509 | *current = ecmd.duplex ? OFPPF_10MB_FD : OFPPF_10MB_HD; | |
1510 | } else if (ecmd.speed == SPEED_100) { | |
1511 | *current = ecmd.duplex ? OFPPF_100MB_FD : OFPPF_100MB_HD; | |
1512 | } else if (ecmd.speed == SPEED_1000) { | |
1513 | *current = ecmd.duplex ? OFPPF_1GB_FD : OFPPF_1GB_HD; | |
1514 | } else if (ecmd.speed == SPEED_10000) { | |
1515 | *current = OFPPF_10GB_FD; | |
1516 | } else { | |
1517 | *current = 0; | |
1518 | } | |
1519 | ||
1520 | if (ecmd.port == PORT_TP) { | |
1521 | *current |= OFPPF_COPPER; | |
1522 | } else if (ecmd.port == PORT_FIBRE) { | |
1523 | *current |= OFPPF_FIBER; | |
1524 | } | |
1525 | ||
1526 | if (ecmd.autoneg) { | |
1527 | *current |= OFPPF_AUTONEG; | |
1528 | } | |
1529 | ||
1530 | /* Peer advertisements. */ | |
1531 | *peer = 0; /* XXX */ | |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | /* Set the features advertised by 'netdev' to 'advertise'. */ | |
1537 | static int | |
1538 | netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise) | |
1539 | { | |
1540 | struct ethtool_cmd ecmd; | |
1541 | int error; | |
1542 | ||
1543 | memset(&ecmd, 0, sizeof ecmd); | |
0b0544d7 | 1544 | error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, |
8b61709d BP |
1545 | ETHTOOL_GSET, "ETHTOOL_GSET"); |
1546 | if (error) { | |
1547 | return error; | |
1548 | } | |
1549 | ||
1550 | ecmd.advertising = 0; | |
1551 | if (advertise & OFPPF_10MB_HD) { | |
1552 | ecmd.advertising |= ADVERTISED_10baseT_Half; | |
1553 | } | |
1554 | if (advertise & OFPPF_10MB_FD) { | |
1555 | ecmd.advertising |= ADVERTISED_10baseT_Full; | |
1556 | } | |
1557 | if (advertise & OFPPF_100MB_HD) { | |
1558 | ecmd.advertising |= ADVERTISED_100baseT_Half; | |
1559 | } | |
1560 | if (advertise & OFPPF_100MB_FD) { | |
1561 | ecmd.advertising |= ADVERTISED_100baseT_Full; | |
1562 | } | |
1563 | if (advertise & OFPPF_1GB_HD) { | |
1564 | ecmd.advertising |= ADVERTISED_1000baseT_Half; | |
1565 | } | |
1566 | if (advertise & OFPPF_1GB_FD) { | |
1567 | ecmd.advertising |= ADVERTISED_1000baseT_Full; | |
1568 | } | |
1569 | if (advertise & OFPPF_10GB_FD) { | |
1570 | ecmd.advertising |= ADVERTISED_10000baseT_Full; | |
1571 | } | |
1572 | if (advertise & OFPPF_COPPER) { | |
1573 | ecmd.advertising |= ADVERTISED_TP; | |
1574 | } | |
1575 | if (advertise & OFPPF_FIBER) { | |
1576 | ecmd.advertising |= ADVERTISED_FIBRE; | |
1577 | } | |
1578 | if (advertise & OFPPF_AUTONEG) { | |
1579 | ecmd.advertising |= ADVERTISED_Autoneg; | |
1580 | } | |
1581 | if (advertise & OFPPF_PAUSE) { | |
1582 | ecmd.advertising |= ADVERTISED_Pause; | |
1583 | } | |
1584 | if (advertise & OFPPF_PAUSE_ASYM) { | |
1585 | ecmd.advertising |= ADVERTISED_Asym_Pause; | |
1586 | } | |
0b0544d7 | 1587 | return netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd, |
8b61709d BP |
1588 | ETHTOOL_SSET, "ETHTOOL_SSET"); |
1589 | } | |
1590 | ||
1591 | /* If 'netdev_name' is the name of a VLAN network device (e.g. one created with | |
1592 | * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device | |
1593 | * and returns 0. Otherwise returns a errno value (specifically ENOENT if | |
1594 | * 'netdev_name' is the name of a network device that is not a VLAN device) and | |
1595 | * sets '*vlan_vid' to -1. */ | |
1596 | static int | |
1597 | netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid) | |
1598 | { | |
1599 | const char *netdev_name = netdev_get_name(netdev); | |
1600 | struct ds line = DS_EMPTY_INITIALIZER; | |
1601 | FILE *stream = NULL; | |
1602 | int error; | |
1603 | char *fn; | |
1604 | ||
1605 | COVERAGE_INC(netdev_get_vlan_vid); | |
1606 | fn = xasprintf("/proc/net/vlan/%s", netdev_name); | |
1607 | stream = fopen(fn, "r"); | |
1608 | if (!stream) { | |
1609 | error = errno; | |
1610 | goto done; | |
1611 | } | |
1612 | ||
1613 | if (ds_get_line(&line, stream)) { | |
1614 | if (ferror(stream)) { | |
1615 | error = errno; | |
1616 | VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno)); | |
1617 | } else { | |
1618 | error = EPROTO; | |
1619 | VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn); | |
1620 | } | |
1621 | goto done; | |
1622 | } | |
1623 | ||
1624 | if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) { | |
1625 | error = EPROTO; | |
1626 | VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"", | |
1627 | fn, ds_cstr(&line)); | |
1628 | goto done; | |
1629 | } | |
1630 | ||
1631 | error = 0; | |
1632 | ||
1633 | done: | |
1634 | free(fn); | |
1635 | if (stream) { | |
1636 | fclose(stream); | |
1637 | } | |
1638 | ds_destroy(&line); | |
1639 | if (error) { | |
1640 | *vlan_vid = -1; | |
1641 | } | |
1642 | return error; | |
1643 | } | |
1644 | ||
1645 | #define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress" | |
1646 | #define POLICE_CONFIG_CMD "/sbin/tc filter add dev %s parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate %dkbit burst %dk mtu 65535 drop flowid :1" | |
8b61709d | 1647 | |
8e460221 | 1648 | /* Remove ingress policing from 'netdev'. Returns 0 if successful, otherwise a |
6f42c8ea BP |
1649 | * positive errno value. |
1650 | * | |
1651 | * This function is equivalent to running | |
1652 | * /sbin/tc qdisc del dev %s handle ffff: ingress | |
1653 | * but it is much, much faster. | |
1654 | */ | |
8e460221 BP |
1655 | static int |
1656 | netdev_linux_remove_policing(struct netdev *netdev) | |
1657 | { | |
80a86fbe BP |
1658 | struct netdev_dev_linux *netdev_dev = |
1659 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
8e460221 | 1660 | const char *netdev_name = netdev_get_name(netdev); |
8e460221 | 1661 | |
6f42c8ea | 1662 | struct ofpbuf request; |
6f42c8ea | 1663 | struct tcmsg *tcmsg; |
6f42c8ea BP |
1664 | int error; |
1665 | ||
c1c9c9c4 | 1666 | tcmsg = tc_make_request(netdev, RTM_DELQDISC, 0, &request); |
23a98ffe BP |
1667 | if (!tcmsg) { |
1668 | return ENODEV; | |
1669 | } | |
c1c9c9c4 | 1670 | tcmsg->tcm_handle = tc_make_handle(0xffff, 0); |
6f42c8ea BP |
1671 | tcmsg->tcm_parent = TC_H_INGRESS; |
1672 | nl_msg_put_string(&request, TCA_KIND, "ingress"); | |
1673 | nl_msg_put_unspec(&request, TCA_OPTIONS, NULL, 0); | |
c1c9c9c4 BP |
1674 | |
1675 | error = tc_transact(&request, NULL); | |
4d10512c | 1676 | if (error && error != ENOENT && error != EINVAL) { |
6f42c8ea BP |
1677 | VLOG_WARN_RL(&rl, "%s: removing policing failed: %s", |
1678 | netdev_name, strerror(error)); | |
1679 | return error; | |
1680 | } | |
1681 | ||
80a86fbe BP |
1682 | netdev_dev->kbits_rate = 0; |
1683 | netdev_dev->kbits_burst = 0; | |
1684 | netdev_dev->cache_valid |= VALID_POLICING; | |
8e460221 BP |
1685 | return 0; |
1686 | } | |
1687 | ||
8b61709d BP |
1688 | /* Attempts to set input rate limiting (policing) policy. */ |
1689 | static int | |
1690 | netdev_linux_set_policing(struct netdev *netdev, | |
1691 | uint32_t kbits_rate, uint32_t kbits_burst) | |
1692 | { | |
80a86fbe BP |
1693 | struct netdev_dev_linux *netdev_dev = |
1694 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
8b61709d BP |
1695 | const char *netdev_name = netdev_get_name(netdev); |
1696 | char command[1024]; | |
1697 | ||
1698 | COVERAGE_INC(netdev_set_policing); | |
8e460221 | 1699 | |
80a86fbe BP |
1700 | kbits_burst = (!kbits_rate ? 0 /* Force to 0 if no rate specified. */ |
1701 | : !kbits_burst ? 1000 /* Default to 1000 kbits if 0. */ | |
1702 | : kbits_burst); /* Stick with user-specified value. */ | |
1703 | ||
1704 | if (netdev_dev->cache_valid & VALID_POLICING | |
1705 | && netdev_dev->kbits_rate == kbits_rate | |
1706 | && netdev_dev->kbits_burst == kbits_burst) { | |
1707 | /* Assume that settings haven't changed since we last set them. */ | |
1708 | return 0; | |
1709 | } | |
1710 | ||
8e460221 | 1711 | netdev_linux_remove_policing(netdev); |
8b61709d | 1712 | if (kbits_rate) { |
8b61709d BP |
1713 | snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name); |
1714 | if (system(command) != 0) { | |
1715 | VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name); | |
1716 | return -1; | |
1717 | } | |
1718 | ||
1719 | snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name, | |
1720 | kbits_rate, kbits_burst); | |
1721 | if (system(command) != 0) { | |
1722 | VLOG_WARN_RL(&rl, "%s: problem configuring policing", | |
1723 | netdev_name); | |
1724 | return -1; | |
1725 | } | |
80a86fbe BP |
1726 | |
1727 | netdev_dev->kbits_rate = kbits_rate; | |
1728 | netdev_dev->kbits_burst = kbits_burst; | |
1729 | netdev_dev->cache_valid |= VALID_POLICING; | |
8b61709d BP |
1730 | } |
1731 | ||
1732 | return 0; | |
1733 | } | |
1734 | ||
c1c9c9c4 BP |
1735 | static int |
1736 | netdev_linux_get_qos_types(const struct netdev *netdev OVS_UNUSED, | |
19993ef3 | 1737 | struct sset *types) |
c1c9c9c4 BP |
1738 | { |
1739 | const struct tc_ops **opsp; | |
1740 | ||
1741 | for (opsp = tcs; *opsp != NULL; opsp++) { | |
1742 | const struct tc_ops *ops = *opsp; | |
1743 | if (ops->tc_install && ops->ovs_name[0] != '\0') { | |
19993ef3 | 1744 | sset_add(types, ops->ovs_name); |
c1c9c9c4 BP |
1745 | } |
1746 | } | |
1747 | return 0; | |
1748 | } | |
1749 | ||
1750 | static const struct tc_ops * | |
1751 | tc_lookup_ovs_name(const char *name) | |
1752 | { | |
1753 | const struct tc_ops **opsp; | |
1754 | ||
1755 | for (opsp = tcs; *opsp != NULL; opsp++) { | |
1756 | const struct tc_ops *ops = *opsp; | |
1757 | if (!strcmp(name, ops->ovs_name)) { | |
1758 | return ops; | |
1759 | } | |
1760 | } | |
1761 | return NULL; | |
1762 | } | |
1763 | ||
1764 | static const struct tc_ops * | |
1765 | tc_lookup_linux_name(const char *name) | |
1766 | { | |
1767 | const struct tc_ops **opsp; | |
1768 | ||
1769 | for (opsp = tcs; *opsp != NULL; opsp++) { | |
1770 | const struct tc_ops *ops = *opsp; | |
1771 | if (ops->linux_name && !strcmp(name, ops->linux_name)) { | |
1772 | return ops; | |
1773 | } | |
1774 | } | |
1775 | return NULL; | |
1776 | } | |
1777 | ||
93b13be8 BP |
1778 | static struct tc_queue * |
1779 | tc_find_queue__(const struct netdev *netdev, unsigned int queue_id, | |
1780 | size_t hash) | |
1781 | { | |
1782 | struct netdev_dev_linux *netdev_dev = | |
1783 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1784 | struct tc_queue *queue; | |
1785 | ||
4e8e4213 | 1786 | HMAP_FOR_EACH_IN_BUCKET (queue, hmap_node, hash, &netdev_dev->tc->queues) { |
93b13be8 BP |
1787 | if (queue->queue_id == queue_id) { |
1788 | return queue; | |
1789 | } | |
1790 | } | |
1791 | return NULL; | |
1792 | } | |
1793 | ||
1794 | static struct tc_queue * | |
1795 | tc_find_queue(const struct netdev *netdev, unsigned int queue_id) | |
1796 | { | |
1797 | return tc_find_queue__(netdev, queue_id, hash_int(queue_id, 0)); | |
1798 | } | |
1799 | ||
c1c9c9c4 BP |
1800 | static int |
1801 | netdev_linux_get_qos_capabilities(const struct netdev *netdev OVS_UNUSED, | |
1802 | const char *type, | |
1803 | struct netdev_qos_capabilities *caps) | |
1804 | { | |
1805 | const struct tc_ops *ops = tc_lookup_ovs_name(type); | |
1806 | if (!ops) { | |
1807 | return EOPNOTSUPP; | |
1808 | } | |
1809 | caps->n_queues = ops->n_queues; | |
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | static int | |
1814 | netdev_linux_get_qos(const struct netdev *netdev, | |
1815 | const char **typep, struct shash *details) | |
1816 | { | |
1817 | struct netdev_dev_linux *netdev_dev = | |
1818 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1819 | int error; | |
1820 | ||
1821 | error = tc_query_qdisc(netdev); | |
1822 | if (error) { | |
1823 | return error; | |
1824 | } | |
1825 | ||
1826 | *typep = netdev_dev->tc->ops->ovs_name; | |
1827 | return (netdev_dev->tc->ops->qdisc_get | |
1828 | ? netdev_dev->tc->ops->qdisc_get(netdev, details) | |
1829 | : 0); | |
1830 | } | |
1831 | ||
1832 | static int | |
1833 | netdev_linux_set_qos(struct netdev *netdev, | |
1834 | const char *type, const struct shash *details) | |
1835 | { | |
1836 | struct netdev_dev_linux *netdev_dev = | |
1837 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1838 | const struct tc_ops *new_ops; | |
1839 | int error; | |
1840 | ||
1841 | new_ops = tc_lookup_ovs_name(type); | |
1842 | if (!new_ops || !new_ops->tc_install) { | |
1843 | return EOPNOTSUPP; | |
1844 | } | |
1845 | ||
1846 | error = tc_query_qdisc(netdev); | |
1847 | if (error) { | |
1848 | return error; | |
1849 | } | |
1850 | ||
1851 | if (new_ops == netdev_dev->tc->ops) { | |
1852 | return new_ops->qdisc_set ? new_ops->qdisc_set(netdev, details) : 0; | |
1853 | } else { | |
1854 | /* Delete existing qdisc. */ | |
1855 | error = tc_del_qdisc(netdev); | |
1856 | if (error) { | |
1857 | return error; | |
1858 | } | |
1859 | assert(netdev_dev->tc == NULL); | |
1860 | ||
1861 | /* Install new qdisc. */ | |
1862 | error = new_ops->tc_install(netdev, details); | |
1863 | assert((error == 0) == (netdev_dev->tc != NULL)); | |
1864 | ||
1865 | return error; | |
1866 | } | |
1867 | } | |
1868 | ||
1869 | static int | |
1870 | netdev_linux_get_queue(const struct netdev *netdev, | |
1871 | unsigned int queue_id, struct shash *details) | |
1872 | { | |
1873 | struct netdev_dev_linux *netdev_dev = | |
1874 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1875 | int error; | |
1876 | ||
1877 | error = tc_query_qdisc(netdev); | |
1878 | if (error) { | |
1879 | return error; | |
93b13be8 BP |
1880 | } else { |
1881 | struct tc_queue *queue = tc_find_queue(netdev, queue_id); | |
1882 | return (queue | |
1883 | ? netdev_dev->tc->ops->class_get(netdev, queue, details) | |
1884 | : ENOENT); | |
c1c9c9c4 | 1885 | } |
c1c9c9c4 BP |
1886 | } |
1887 | ||
1888 | static int | |
1889 | netdev_linux_set_queue(struct netdev *netdev, | |
1890 | unsigned int queue_id, const struct shash *details) | |
1891 | { | |
1892 | struct netdev_dev_linux *netdev_dev = | |
1893 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1894 | int error; | |
1895 | ||
1896 | error = tc_query_qdisc(netdev); | |
1897 | if (error) { | |
1898 | return error; | |
1899 | } else if (queue_id >= netdev_dev->tc->ops->n_queues | |
1900 | || !netdev_dev->tc->ops->class_set) { | |
1901 | return EINVAL; | |
1902 | } | |
1903 | ||
1904 | return netdev_dev->tc->ops->class_set(netdev, queue_id, details); | |
1905 | } | |
1906 | ||
1907 | static int | |
1908 | netdev_linux_delete_queue(struct netdev *netdev, unsigned int queue_id) | |
1909 | { | |
1910 | struct netdev_dev_linux *netdev_dev = | |
1911 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1912 | int error; | |
1913 | ||
1914 | error = tc_query_qdisc(netdev); | |
1915 | if (error) { | |
1916 | return error; | |
1917 | } else if (!netdev_dev->tc->ops->class_delete) { | |
1918 | return EINVAL; | |
93b13be8 BP |
1919 | } else { |
1920 | struct tc_queue *queue = tc_find_queue(netdev, queue_id); | |
1921 | return (queue | |
1922 | ? netdev_dev->tc->ops->class_delete(netdev, queue) | |
1923 | : ENOENT); | |
c1c9c9c4 | 1924 | } |
c1c9c9c4 BP |
1925 | } |
1926 | ||
1927 | static int | |
1928 | netdev_linux_get_queue_stats(const struct netdev *netdev, | |
1929 | unsigned int queue_id, | |
1930 | struct netdev_queue_stats *stats) | |
1931 | { | |
1932 | struct netdev_dev_linux *netdev_dev = | |
1933 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
1934 | int error; | |
1935 | ||
1936 | error = tc_query_qdisc(netdev); | |
1937 | if (error) { | |
1938 | return error; | |
c1c9c9c4 BP |
1939 | } else if (!netdev_dev->tc->ops->class_get_stats) { |
1940 | return EOPNOTSUPP; | |
93b13be8 BP |
1941 | } else { |
1942 | const struct tc_queue *queue = tc_find_queue(netdev, queue_id); | |
1943 | return (queue | |
1944 | ? netdev_dev->tc->ops->class_get_stats(netdev, queue, stats) | |
1945 | : ENOENT); | |
c1c9c9c4 | 1946 | } |
c1c9c9c4 BP |
1947 | } |
1948 | ||
23a98ffe | 1949 | static bool |
c1c9c9c4 BP |
1950 | start_queue_dump(const struct netdev *netdev, struct nl_dump *dump) |
1951 | { | |
1952 | struct ofpbuf request; | |
1953 | struct tcmsg *tcmsg; | |
1954 | ||
1955 | tcmsg = tc_make_request(netdev, RTM_GETTCLASS, 0, &request); | |
23a98ffe BP |
1956 | if (!tcmsg) { |
1957 | return false; | |
1958 | } | |
3c4de644 | 1959 | tcmsg->tcm_parent = 0; |
c1c9c9c4 BP |
1960 | nl_dump_start(dump, rtnl_sock, &request); |
1961 | ofpbuf_uninit(&request); | |
23a98ffe | 1962 | return true; |
c1c9c9c4 BP |
1963 | } |
1964 | ||
1965 | static int | |
1966 | netdev_linux_dump_queues(const struct netdev *netdev, | |
1967 | netdev_dump_queues_cb *cb, void *aux) | |
1968 | { | |
1969 | struct netdev_dev_linux *netdev_dev = | |
1970 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
93b13be8 | 1971 | struct tc_queue *queue; |
c1c9c9c4 BP |
1972 | struct shash details; |
1973 | int last_error; | |
c1c9c9c4 BP |
1974 | int error; |
1975 | ||
1976 | error = tc_query_qdisc(netdev); | |
1977 | if (error) { | |
1978 | return error; | |
1979 | } else if (!netdev_dev->tc->ops->class_get) { | |
1980 | return EOPNOTSUPP; | |
1981 | } | |
1982 | ||
1983 | last_error = 0; | |
1984 | shash_init(&details); | |
4e8e4213 | 1985 | HMAP_FOR_EACH (queue, hmap_node, &netdev_dev->tc->queues) { |
c1c9c9c4 BP |
1986 | shash_clear(&details); |
1987 | ||
93b13be8 | 1988 | error = netdev_dev->tc->ops->class_get(netdev, queue, &details); |
c1c9c9c4 | 1989 | if (!error) { |
93b13be8 | 1990 | (*cb)(queue->queue_id, &details, aux); |
c1c9c9c4 BP |
1991 | } else { |
1992 | last_error = error; | |
1993 | } | |
1994 | } | |
1995 | shash_destroy(&details); | |
1996 | ||
1997 | return last_error; | |
1998 | } | |
1999 | ||
2000 | static int | |
2001 | netdev_linux_dump_queue_stats(const struct netdev *netdev, | |
2002 | netdev_dump_queue_stats_cb *cb, void *aux) | |
2003 | { | |
2004 | struct netdev_dev_linux *netdev_dev = | |
2005 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
2006 | struct nl_dump dump; | |
2007 | struct ofpbuf msg; | |
2008 | int last_error; | |
2009 | int error; | |
2010 | ||
2011 | error = tc_query_qdisc(netdev); | |
2012 | if (error) { | |
2013 | return error; | |
2014 | } else if (!netdev_dev->tc->ops->class_dump_stats) { | |
2015 | return EOPNOTSUPP; | |
2016 | } | |
2017 | ||
2018 | last_error = 0; | |
23a98ffe BP |
2019 | if (!start_queue_dump(netdev, &dump)) { |
2020 | return ENODEV; | |
2021 | } | |
c1c9c9c4 BP |
2022 | while (nl_dump_next(&dump, &msg)) { |
2023 | error = netdev_dev->tc->ops->class_dump_stats(netdev, &msg, cb, aux); | |
2024 | if (error) { | |
2025 | last_error = error; | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | error = nl_dump_done(&dump); | |
2030 | return error ? error : last_error; | |
2031 | } | |
2032 | ||
8b61709d | 2033 | static int |
f1acd62b BP |
2034 | netdev_linux_get_in4(const struct netdev *netdev_, |
2035 | struct in_addr *address, struct in_addr *netmask) | |
8b61709d | 2036 | { |
149f577a JG |
2037 | struct netdev_dev_linux *netdev_dev = |
2038 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
2039 | ||
2040 | if (!(netdev_dev->cache_valid & VALID_IN4)) { | |
8b61709d BP |
2041 | int error; |
2042 | ||
149f577a | 2043 | error = netdev_linux_get_ipv4(netdev_, &netdev_dev->address, |
8b61709d BP |
2044 | SIOCGIFADDR, "SIOCGIFADDR"); |
2045 | if (error) { | |
2046 | return error; | |
2047 | } | |
2048 | ||
149f577a | 2049 | error = netdev_linux_get_ipv4(netdev_, &netdev_dev->netmask, |
f1acd62b BP |
2050 | SIOCGIFNETMASK, "SIOCGIFNETMASK"); |
2051 | if (error) { | |
2052 | return error; | |
2053 | } | |
2054 | ||
149f577a | 2055 | netdev_dev->cache_valid |= VALID_IN4; |
8b61709d | 2056 | } |
149f577a JG |
2057 | *address = netdev_dev->address; |
2058 | *netmask = netdev_dev->netmask; | |
f1acd62b | 2059 | return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0; |
8b61709d BP |
2060 | } |
2061 | ||
8b61709d | 2062 | static int |
f1acd62b BP |
2063 | netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address, |
2064 | struct in_addr netmask) | |
8b61709d | 2065 | { |
149f577a JG |
2066 | struct netdev_dev_linux *netdev_dev = |
2067 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
8b61709d BP |
2068 | int error; |
2069 | ||
f1acd62b | 2070 | error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address); |
8b61709d | 2071 | if (!error) { |
149f577a JG |
2072 | netdev_dev->cache_valid |= VALID_IN4; |
2073 | netdev_dev->address = address; | |
2074 | netdev_dev->netmask = netmask; | |
f1acd62b | 2075 | if (address.s_addr != INADDR_ANY) { |
8b61709d | 2076 | error = do_set_addr(netdev_, SIOCSIFNETMASK, |
f1acd62b | 2077 | "SIOCSIFNETMASK", netmask); |
8b61709d BP |
2078 | } |
2079 | } | |
2080 | return error; | |
2081 | } | |
2082 | ||
2083 | static bool | |
2084 | parse_if_inet6_line(const char *line, | |
2085 | struct in6_addr *in6, char ifname[16 + 1]) | |
2086 | { | |
2087 | uint8_t *s6 = in6->s6_addr; | |
2088 | #define X8 "%2"SCNx8 | |
2089 | return sscanf(line, | |
2090 | " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 | |
2091 | "%*x %*x %*x %*x %16s\n", | |
2092 | &s6[0], &s6[1], &s6[2], &s6[3], | |
2093 | &s6[4], &s6[5], &s6[6], &s6[7], | |
2094 | &s6[8], &s6[9], &s6[10], &s6[11], | |
2095 | &s6[12], &s6[13], &s6[14], &s6[15], | |
2096 | ifname) == 17; | |
2097 | } | |
2098 | ||
2099 | /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if | |
2100 | * 'in6' is non-null) and returns true. Otherwise, returns false. */ | |
2101 | static int | |
2102 | netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6) | |
2103 | { | |
149f577a JG |
2104 | struct netdev_dev_linux *netdev_dev = |
2105 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
2106 | if (!(netdev_dev->cache_valid & VALID_IN6)) { | |
8b61709d BP |
2107 | FILE *file; |
2108 | char line[128]; | |
2109 | ||
149f577a | 2110 | netdev_dev->in6 = in6addr_any; |
8b61709d BP |
2111 | |
2112 | file = fopen("/proc/net/if_inet6", "r"); | |
2113 | if (file != NULL) { | |
2114 | const char *name = netdev_get_name(netdev_); | |
2115 | while (fgets(line, sizeof line, file)) { | |
2a022368 | 2116 | struct in6_addr in6_tmp; |
8b61709d | 2117 | char ifname[16 + 1]; |
2a022368 | 2118 | if (parse_if_inet6_line(line, &in6_tmp, ifname) |
8b61709d BP |
2119 | && !strcmp(name, ifname)) |
2120 | { | |
2a022368 | 2121 | netdev_dev->in6 = in6_tmp; |
8b61709d BP |
2122 | break; |
2123 | } | |
2124 | } | |
2125 | fclose(file); | |
2126 | } | |
149f577a | 2127 | netdev_dev->cache_valid |= VALID_IN6; |
8b61709d | 2128 | } |
149f577a | 2129 | *in6 = netdev_dev->in6; |
8b61709d BP |
2130 | return 0; |
2131 | } | |
2132 | ||
2133 | static void | |
2134 | make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr) | |
2135 | { | |
2136 | struct sockaddr_in sin; | |
2137 | memset(&sin, 0, sizeof sin); | |
2138 | sin.sin_family = AF_INET; | |
2139 | sin.sin_addr = addr; | |
2140 | sin.sin_port = 0; | |
2141 | ||
2142 | memset(sa, 0, sizeof *sa); | |
2143 | memcpy(sa, &sin, sizeof sin); | |
2144 | } | |
2145 | ||
2146 | static int | |
2147 | do_set_addr(struct netdev *netdev, | |
2148 | int ioctl_nr, const char *ioctl_name, struct in_addr addr) | |
2149 | { | |
2150 | struct ifreq ifr; | |
71d7c22f | 2151 | ovs_strzcpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name); |
8b61709d | 2152 | make_in4_sockaddr(&ifr.ifr_addr, addr); |
149f577a JG |
2153 | |
2154 | return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr, | |
2155 | ioctl_name); | |
8b61709d BP |
2156 | } |
2157 | ||
2158 | /* Adds 'router' as a default IP gateway. */ | |
2159 | static int | |
67a4917b | 2160 | netdev_linux_add_router(struct netdev *netdev OVS_UNUSED, struct in_addr router) |
8b61709d BP |
2161 | { |
2162 | struct in_addr any = { INADDR_ANY }; | |
2163 | struct rtentry rt; | |
2164 | int error; | |
2165 | ||
2166 | memset(&rt, 0, sizeof rt); | |
2167 | make_in4_sockaddr(&rt.rt_dst, any); | |
2168 | make_in4_sockaddr(&rt.rt_gateway, router); | |
2169 | make_in4_sockaddr(&rt.rt_genmask, any); | |
2170 | rt.rt_flags = RTF_UP | RTF_GATEWAY; | |
8b61709d BP |
2171 | error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0; |
2172 | if (error) { | |
2173 | VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error)); | |
2174 | } | |
2175 | return error; | |
2176 | } | |
2177 | ||
f1acd62b BP |
2178 | static int |
2179 | netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop, | |
2180 | char **netdev_name) | |
2181 | { | |
2182 | static const char fn[] = "/proc/net/route"; | |
2183 | FILE *stream; | |
2184 | char line[256]; | |
2185 | int ln; | |
2186 | ||
2187 | *netdev_name = NULL; | |
2188 | stream = fopen(fn, "r"); | |
2189 | if (stream == NULL) { | |
2190 | VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno)); | |
2191 | return errno; | |
2192 | } | |
2193 | ||
2194 | ln = 0; | |
2195 | while (fgets(line, sizeof line, stream)) { | |
2196 | if (++ln >= 2) { | |
2197 | char iface[17]; | |
dbba996b | 2198 | ovs_be32 dest, gateway, mask; |
f1acd62b BP |
2199 | int refcnt, metric, mtu; |
2200 | unsigned int flags, use, window, irtt; | |
2201 | ||
2202 | if (sscanf(line, | |
2203 | "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32 | |
2204 | " %d %u %u\n", | |
2205 | iface, &dest, &gateway, &flags, &refcnt, | |
2206 | &use, &metric, &mask, &mtu, &window, &irtt) != 11) { | |
2207 | ||
d295e8e9 | 2208 | VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s", |
f1acd62b BP |
2209 | fn, ln, line); |
2210 | continue; | |
2211 | } | |
2212 | if (!(flags & RTF_UP)) { | |
2213 | /* Skip routes that aren't up. */ | |
2214 | continue; | |
2215 | } | |
2216 | ||
2217 | /* The output of 'dest', 'mask', and 'gateway' were given in | |
d295e8e9 | 2218 | * network byte order, so we don't need need any endian |
f1acd62b BP |
2219 | * conversions here. */ |
2220 | if ((dest & mask) == (host->s_addr & mask)) { | |
2221 | if (!gateway) { | |
2222 | /* The host is directly reachable. */ | |
2223 | next_hop->s_addr = 0; | |
2224 | } else { | |
2225 | /* To reach the host, we must go through a gateway. */ | |
2226 | next_hop->s_addr = gateway; | |
2227 | } | |
2228 | *netdev_name = xstrdup(iface); | |
2229 | fclose(stream); | |
2230 | return 0; | |
2231 | } | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | fclose(stream); | |
2236 | return ENXIO; | |
2237 | } | |
2238 | ||
e210037e AE |
2239 | static int |
2240 | netdev_linux_get_status(const struct netdev *netdev, struct shash *sh) | |
2241 | { | |
2242 | struct ethtool_drvinfo drvinfo; | |
2243 | int error; | |
2244 | ||
2245 | memset(&drvinfo, 0, sizeof drvinfo); | |
2246 | error = netdev_linux_do_ethtool(netdev_get_name(netdev), | |
2247 | (struct ethtool_cmd *)&drvinfo, | |
2248 | ETHTOOL_GDRVINFO, | |
2249 | "ETHTOOL_GDRVINFO"); | |
2250 | if (!error) { | |
2251 | shash_add(sh, "driver_name", xstrdup(drvinfo.driver)); | |
2252 | shash_add(sh, "driver_version", xstrdup(drvinfo.version)); | |
2253 | shash_add(sh, "firmware_version", xstrdup(drvinfo.fw_version)); | |
2254 | } | |
2255 | ||
2256 | return error; | |
2257 | } | |
2258 | ||
8b61709d BP |
2259 | /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be |
2260 | * successfully retrieved, it stores the corresponding MAC address in 'mac' and | |
2261 | * returns 0. Otherwise, it returns a positive errno value; in particular, | |
2262 | * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */ | |
2263 | static int | |
2264 | netdev_linux_arp_lookup(const struct netdev *netdev, | |
dbba996b | 2265 | ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN]) |
8b61709d BP |
2266 | { |
2267 | struct arpreq r; | |
c100e025 | 2268 | struct sockaddr_in sin; |
8b61709d BP |
2269 | int retval; |
2270 | ||
2271 | memset(&r, 0, sizeof r); | |
f2cc621b | 2272 | memset(&sin, 0, sizeof sin); |
c100e025 BP |
2273 | sin.sin_family = AF_INET; |
2274 | sin.sin_addr.s_addr = ip; | |
2275 | sin.sin_port = 0; | |
2276 | memcpy(&r.arp_pa, &sin, sizeof sin); | |
8b61709d BP |
2277 | r.arp_ha.sa_family = ARPHRD_ETHER; |
2278 | r.arp_flags = 0; | |
71d7c22f | 2279 | ovs_strzcpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev); |
8b61709d BP |
2280 | COVERAGE_INC(netdev_arp_lookup); |
2281 | retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0; | |
2282 | if (!retval) { | |
2283 | memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN); | |
2284 | } else if (retval != ENXIO) { | |
2285 | VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s", | |
149f577a | 2286 | netdev_get_name(netdev), IP_ARGS(&ip), strerror(retval)); |
8b61709d BP |
2287 | } |
2288 | return retval; | |
2289 | } | |
2290 | ||
2291 | static int | |
2292 | nd_to_iff_flags(enum netdev_flags nd) | |
2293 | { | |
2294 | int iff = 0; | |
2295 | if (nd & NETDEV_UP) { | |
2296 | iff |= IFF_UP; | |
2297 | } | |
2298 | if (nd & NETDEV_PROMISC) { | |
2299 | iff |= IFF_PROMISC; | |
2300 | } | |
2301 | return iff; | |
2302 | } | |
2303 | ||
2304 | static int | |
2305 | iff_to_nd_flags(int iff) | |
2306 | { | |
2307 | enum netdev_flags nd = 0; | |
2308 | if (iff & IFF_UP) { | |
2309 | nd |= NETDEV_UP; | |
2310 | } | |
2311 | if (iff & IFF_PROMISC) { | |
2312 | nd |= NETDEV_PROMISC; | |
2313 | } | |
2314 | return nd; | |
2315 | } | |
2316 | ||
2317 | static int | |
2318 | netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off, | |
2319 | enum netdev_flags on, enum netdev_flags *old_flagsp) | |
2320 | { | |
2321 | int old_flags, new_flags; | |
2322 | int error; | |
2323 | ||
2324 | error = get_flags(netdev, &old_flags); | |
2325 | if (!error) { | |
2326 | *old_flagsp = iff_to_nd_flags(old_flags); | |
2327 | new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on); | |
2328 | if (new_flags != old_flags) { | |
2329 | error = set_flags(netdev, new_flags); | |
2330 | } | |
2331 | } | |
2332 | return error; | |
2333 | } | |
2334 | ||
ac4d3bcb EJ |
2335 | static unsigned int |
2336 | netdev_linux_change_seq(const struct netdev *netdev) | |
2337 | { | |
2338 | return netdev_dev_linux_cast(netdev_get_dev(netdev))->change_seq; | |
2339 | } | |
2340 | ||
f613a0d7 | 2341 | #define NETDEV_LINUX_CLASS(NAME, CREATE, ENUMERATE, GET_STATS, SET_STATS) \ |
c3827f61 BP |
2342 | { \ |
2343 | NAME, \ | |
2344 | \ | |
2345 | netdev_linux_init, \ | |
2346 | netdev_linux_run, \ | |
2347 | netdev_linux_wait, \ | |
2348 | \ | |
2349 | CREATE, \ | |
2350 | netdev_linux_destroy, \ | |
de5cdb90 | 2351 | NULL, /* get_config */ \ |
6d9e6eb4 | 2352 | NULL, /* set_config */ \ |
c3827f61 BP |
2353 | \ |
2354 | netdev_linux_open, \ | |
2355 | netdev_linux_close, \ | |
2356 | \ | |
2357 | ENUMERATE, \ | |
2358 | \ | |
7b6b0ef4 | 2359 | netdev_linux_listen, \ |
c3827f61 BP |
2360 | netdev_linux_recv, \ |
2361 | netdev_linux_recv_wait, \ | |
2362 | netdev_linux_drain, \ | |
2363 | \ | |
2364 | netdev_linux_send, \ | |
2365 | netdev_linux_send_wait, \ | |
2366 | \ | |
2367 | netdev_linux_set_etheraddr, \ | |
2368 | netdev_linux_get_etheraddr, \ | |
2369 | netdev_linux_get_mtu, \ | |
9b020780 | 2370 | netdev_linux_set_mtu, \ |
c3827f61 BP |
2371 | netdev_linux_get_ifindex, \ |
2372 | netdev_linux_get_carrier, \ | |
1670c579 | 2373 | netdev_linux_set_miimon_interval, \ |
f613a0d7 | 2374 | GET_STATS, \ |
c3827f61 BP |
2375 | SET_STATS, \ |
2376 | \ | |
2377 | netdev_linux_get_features, \ | |
2378 | netdev_linux_set_advertisements, \ | |
2379 | netdev_linux_get_vlan_vid, \ | |
2380 | \ | |
2381 | netdev_linux_set_policing, \ | |
2382 | netdev_linux_get_qos_types, \ | |
2383 | netdev_linux_get_qos_capabilities, \ | |
2384 | netdev_linux_get_qos, \ | |
2385 | netdev_linux_set_qos, \ | |
2386 | netdev_linux_get_queue, \ | |
2387 | netdev_linux_set_queue, \ | |
2388 | netdev_linux_delete_queue, \ | |
2389 | netdev_linux_get_queue_stats, \ | |
2390 | netdev_linux_dump_queues, \ | |
2391 | netdev_linux_dump_queue_stats, \ | |
2392 | \ | |
2393 | netdev_linux_get_in4, \ | |
2394 | netdev_linux_set_in4, \ | |
2395 | netdev_linux_get_in6, \ | |
2396 | netdev_linux_add_router, \ | |
2397 | netdev_linux_get_next_hop, \ | |
e210037e | 2398 | netdev_linux_get_status, \ |
c3827f61 BP |
2399 | netdev_linux_arp_lookup, \ |
2400 | \ | |
2401 | netdev_linux_update_flags, \ | |
2402 | \ | |
ac4d3bcb | 2403 | netdev_linux_change_seq \ |
c3827f61 BP |
2404 | } |
2405 | ||
2406 | const struct netdev_class netdev_linux_class = | |
2407 | NETDEV_LINUX_CLASS( | |
2408 | "system", | |
2409 | netdev_linux_create, | |
2410 | netdev_linux_enumerate, | |
f613a0d7 | 2411 | netdev_linux_get_stats, |
98563392 | 2412 | NULL); /* set_stats */ |
c3827f61 BP |
2413 | |
2414 | const struct netdev_class netdev_tap_class = | |
2415 | NETDEV_LINUX_CLASS( | |
2416 | "tap", | |
2417 | netdev_linux_create_tap, | |
2418 | NULL, /* enumerate */ | |
f613a0d7 | 2419 | netdev_pseudo_get_stats, |
c3827f61 BP |
2420 | NULL); /* set_stats */ |
2421 | ||
2422 | const struct netdev_class netdev_internal_class = | |
2423 | NETDEV_LINUX_CLASS( | |
2424 | "internal", | |
2425 | netdev_linux_create, | |
2426 | NULL, /* enumerate */ | |
f613a0d7 | 2427 | netdev_pseudo_get_stats, |
c3827f61 | 2428 | netdev_vport_set_stats); |
8b61709d | 2429 | \f |
c1c9c9c4 | 2430 | /* HTB traffic control class. */ |
559843ed | 2431 | |
c1c9c9c4 | 2432 | #define HTB_N_QUEUES 0xf000 |
8b61709d | 2433 | |
c1c9c9c4 BP |
2434 | struct htb { |
2435 | struct tc tc; | |
2436 | unsigned int max_rate; /* In bytes/s. */ | |
2437 | }; | |
8b61709d | 2438 | |
c1c9c9c4 | 2439 | struct htb_class { |
93b13be8 | 2440 | struct tc_queue tc_queue; |
c1c9c9c4 BP |
2441 | unsigned int min_rate; /* In bytes/s. */ |
2442 | unsigned int max_rate; /* In bytes/s. */ | |
2443 | unsigned int burst; /* In bytes. */ | |
2444 | unsigned int priority; /* Lower values are higher priorities. */ | |
2445 | }; | |
8b61709d | 2446 | |
c1c9c9c4 BP |
2447 | static struct htb * |
2448 | htb_get__(const struct netdev *netdev) | |
2449 | { | |
2450 | struct netdev_dev_linux *netdev_dev = | |
2451 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
2452 | return CONTAINER_OF(netdev_dev->tc, struct htb, tc); | |
2453 | } | |
2454 | ||
24045e35 | 2455 | static void |
c1c9c9c4 BP |
2456 | htb_install__(struct netdev *netdev, uint64_t max_rate) |
2457 | { | |
2458 | struct netdev_dev_linux *netdev_dev = | |
2459 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
2460 | struct htb *htb; | |
2461 | ||
2462 | htb = xmalloc(sizeof *htb); | |
2463 | tc_init(&htb->tc, &tc_ops_htb); | |
2464 | htb->max_rate = max_rate; | |
2465 | ||
2466 | netdev_dev->tc = &htb->tc; | |
c1c9c9c4 BP |
2467 | } |
2468 | ||
2469 | /* Create an HTB qdisc. | |
2470 | * | |
a339aa81 | 2471 | * Equivalent to "tc qdisc add dev <dev> root handle 1: htb default 1". */ |
c1c9c9c4 BP |
2472 | static int |
2473 | htb_setup_qdisc__(struct netdev *netdev) | |
2474 | { | |
2475 | size_t opt_offset; | |
2476 | struct tc_htb_glob opt; | |
2477 | struct ofpbuf request; | |
2478 | struct tcmsg *tcmsg; | |
2479 | ||
2480 | tc_del_qdisc(netdev); | |
2481 | ||
2482 | tcmsg = tc_make_request(netdev, RTM_NEWQDISC, | |
2483 | NLM_F_EXCL | NLM_F_CREATE, &request); | |
23a98ffe BP |
2484 | if (!tcmsg) { |
2485 | return ENODEV; | |
2486 | } | |
c1c9c9c4 BP |
2487 | tcmsg->tcm_handle = tc_make_handle(1, 0); |
2488 | tcmsg->tcm_parent = TC_H_ROOT; | |
2489 | ||
2490 | nl_msg_put_string(&request, TCA_KIND, "htb"); | |
2491 | ||
2492 | memset(&opt, 0, sizeof opt); | |
2493 | opt.rate2quantum = 10; | |
2494 | opt.version = 3; | |
4ecf12d5 | 2495 | opt.defcls = 1; |
c1c9c9c4 BP |
2496 | |
2497 | opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS); | |
2498 | nl_msg_put_unspec(&request, TCA_HTB_INIT, &opt, sizeof opt); | |
2499 | nl_msg_end_nested(&request, opt_offset); | |
2500 | ||
2501 | return tc_transact(&request, NULL); | |
2502 | } | |
2503 | ||
2504 | /* Equivalent to "tc class replace <dev> classid <handle> parent <parent> htb | |
2505 | * rate <min_rate>bps ceil <max_rate>bps burst <burst>b prio <priority>". */ | |
2506 | static int | |
2507 | htb_setup_class__(struct netdev *netdev, unsigned int handle, | |
2508 | unsigned int parent, struct htb_class *class) | |
2509 | { | |
2510 | size_t opt_offset; | |
2511 | struct tc_htb_opt opt; | |
2512 | struct ofpbuf request; | |
2513 | struct tcmsg *tcmsg; | |
2514 | int error; | |
2515 | int mtu; | |
2516 | ||
9b020780 PS |
2517 | error = netdev_get_mtu(netdev, &mtu); |
2518 | if (error) { | |
f915f1a8 BP |
2519 | VLOG_WARN_RL(&rl, "cannot set up HTB on device %s that lacks MTU", |
2520 | netdev_get_name(netdev)); | |
9b020780 | 2521 | return error; |
f915f1a8 | 2522 | } |
c1c9c9c4 BP |
2523 | |
2524 | memset(&opt, 0, sizeof opt); | |
2525 | tc_fill_rate(&opt.rate, class->min_rate, mtu); | |
2526 | tc_fill_rate(&opt.ceil, class->max_rate, mtu); | |
2527 | opt.buffer = tc_calc_buffer(opt.rate.rate, mtu, class->burst); | |
2528 | opt.cbuffer = tc_calc_buffer(opt.ceil.rate, mtu, class->burst); | |
2529 | opt.prio = class->priority; | |
2530 | ||
2531 | tcmsg = tc_make_request(netdev, RTM_NEWTCLASS, NLM_F_CREATE, &request); | |
23a98ffe BP |
2532 | if (!tcmsg) { |
2533 | return ENODEV; | |
2534 | } | |
c1c9c9c4 BP |
2535 | tcmsg->tcm_handle = handle; |
2536 | tcmsg->tcm_parent = parent; | |
2537 | ||
2538 | nl_msg_put_string(&request, TCA_KIND, "htb"); | |
2539 | opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS); | |
2540 | nl_msg_put_unspec(&request, TCA_HTB_PARMS, &opt, sizeof opt); | |
2541 | tc_put_rtab(&request, TCA_HTB_RTAB, &opt.rate); | |
2542 | tc_put_rtab(&request, TCA_HTB_CTAB, &opt.ceil); | |
2543 | nl_msg_end_nested(&request, opt_offset); | |
2544 | ||
2545 | error = tc_transact(&request, NULL); | |
2546 | if (error) { | |
2547 | VLOG_WARN_RL(&rl, "failed to replace %s class %u:%u, parent %u:%u, " | |
2548 | "min_rate=%u max_rate=%u burst=%u prio=%u (%s)", | |
2549 | netdev_get_name(netdev), | |
2550 | tc_get_major(handle), tc_get_minor(handle), | |
2551 | tc_get_major(parent), tc_get_minor(parent), | |
2552 | class->min_rate, class->max_rate, | |
2553 | class->burst, class->priority, strerror(error)); | |
2554 | } | |
2555 | return error; | |
2556 | } | |
2557 | ||
2558 | /* Parses Netlink attributes in 'options' for HTB parameters and stores a | |
2559 | * description of them into 'details'. The description complies with the | |
2560 | * specification given in the vswitch database documentation for linux-htb | |
2561 | * queue details. */ | |
2562 | static int | |
2563 | htb_parse_tca_options__(struct nlattr *nl_options, struct htb_class *class) | |
2564 | { | |
2565 | static const struct nl_policy tca_htb_policy[] = { | |
2566 | [TCA_HTB_PARMS] = { .type = NL_A_UNSPEC, .optional = false, | |
2567 | .min_len = sizeof(struct tc_htb_opt) }, | |
2568 | }; | |
2569 | ||
2570 | struct nlattr *attrs[ARRAY_SIZE(tca_htb_policy)]; | |
2571 | const struct tc_htb_opt *htb; | |
2572 | ||
2573 | if (!nl_parse_nested(nl_options, tca_htb_policy, | |
2574 | attrs, ARRAY_SIZE(tca_htb_policy))) { | |
2575 | VLOG_WARN_RL(&rl, "failed to parse HTB class options"); | |
2576 | return EPROTO; | |
2577 | } | |
2578 | ||
2579 | htb = nl_attr_get(attrs[TCA_HTB_PARMS]); | |
2580 | class->min_rate = htb->rate.rate; | |
2581 | class->max_rate = htb->ceil.rate; | |
2582 | class->burst = tc_ticks_to_bytes(htb->rate.rate, htb->buffer); | |
2583 | class->priority = htb->prio; | |
2584 | return 0; | |
2585 | } | |
2586 | ||
2587 | static int | |
2588 | htb_parse_tcmsg__(struct ofpbuf *tcmsg, unsigned int *queue_id, | |
2589 | struct htb_class *options, | |
2590 | struct netdev_queue_stats *stats) | |
2591 | { | |
2592 | struct nlattr *nl_options; | |
2593 | unsigned int handle; | |
2594 | int error; | |
2595 | ||
2596 | error = tc_parse_class(tcmsg, &handle, &nl_options, stats); | |
2597 | if (!error && queue_id) { | |
17ee3c1f BP |
2598 | unsigned int major = tc_get_major(handle); |
2599 | unsigned int minor = tc_get_minor(handle); | |
2600 | if (major == 1 && minor > 0 && minor <= HTB_N_QUEUES) { | |
2601 | *queue_id = minor - 1; | |
c1c9c9c4 BP |
2602 | } else { |
2603 | error = EPROTO; | |
2604 | } | |
2605 | } | |
2606 | if (!error && options) { | |
2607 | error = htb_parse_tca_options__(nl_options, options); | |
2608 | } | |
2609 | return error; | |
2610 | } | |
2611 | ||
2612 | static void | |
2613 | htb_parse_qdisc_details__(struct netdev *netdev, | |
2614 | const struct shash *details, struct htb_class *hc) | |
2615 | { | |
2616 | const char *max_rate_s; | |
2617 | ||
2618 | max_rate_s = shash_find_data(details, "max-rate"); | |
2619 | hc->max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0; | |
2620 | if (!hc->max_rate) { | |
2621 | uint32_t current; | |
2622 | ||
2623 | netdev_get_features(netdev, ¤t, NULL, NULL, NULL); | |
2624 | hc->max_rate = netdev_features_to_bps(current) / 8; | |
2625 | } | |
2626 | hc->min_rate = hc->max_rate; | |
2627 | hc->burst = 0; | |
2628 | hc->priority = 0; | |
2629 | } | |
2630 | ||
2631 | static int | |
2632 | htb_parse_class_details__(struct netdev *netdev, | |
2633 | const struct shash *details, struct htb_class *hc) | |
2634 | { | |
2635 | const struct htb *htb = htb_get__(netdev); | |
2636 | const char *min_rate_s = shash_find_data(details, "min-rate"); | |
2637 | const char *max_rate_s = shash_find_data(details, "max-rate"); | |
2638 | const char *burst_s = shash_find_data(details, "burst"); | |
2639 | const char *priority_s = shash_find_data(details, "priority"); | |
9b020780 | 2640 | int mtu, error; |
c1c9c9c4 | 2641 | |
9b020780 PS |
2642 | error = netdev_get_mtu(netdev, &mtu); |
2643 | if (error) { | |
f915f1a8 BP |
2644 | VLOG_WARN_RL(&rl, "cannot parse HTB class on device %s that lacks MTU", |
2645 | netdev_get_name(netdev)); | |
9b020780 | 2646 | return error; |
f915f1a8 BP |
2647 | } |
2648 | ||
4f104611 EJ |
2649 | /* HTB requires at least an mtu sized min-rate to send any traffic even |
2650 | * on uncongested links. */ | |
c45ab5e9 | 2651 | hc->min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0; |
4f104611 | 2652 | hc->min_rate = MAX(hc->min_rate, mtu); |
c1c9c9c4 BP |
2653 | hc->min_rate = MIN(hc->min_rate, htb->max_rate); |
2654 | ||
2655 | /* max-rate */ | |
2656 | hc->max_rate = (max_rate_s | |
2657 | ? strtoull(max_rate_s, NULL, 10) / 8 | |
2658 | : htb->max_rate); | |
2659 | hc->max_rate = MAX(hc->max_rate, hc->min_rate); | |
2660 | hc->max_rate = MIN(hc->max_rate, htb->max_rate); | |
2661 | ||
2662 | /* burst | |
2663 | * | |
2664 | * According to hints in the documentation that I've read, it is important | |
2665 | * that 'burst' be at least as big as the largest frame that might be | |
2666 | * transmitted. Also, making 'burst' a bit bigger than necessary is OK, | |
2667 | * but having it a bit too small is a problem. Since netdev_get_mtu() | |
2668 | * doesn't include the Ethernet header, we need to add at least 14 (18?) to | |
2669 | * the MTU. We actually add 64, instead of 14, as a guard against | |
2670 | * additional headers get tacked on somewhere that we're not aware of. */ | |
c1c9c9c4 BP |
2671 | hc->burst = burst_s ? strtoull(burst_s, NULL, 10) / 8 : 0; |
2672 | hc->burst = MAX(hc->burst, mtu + 64); | |
2673 | ||
2674 | /* priority */ | |
2675 | hc->priority = priority_s ? strtoul(priority_s, NULL, 10) : 0; | |
2676 | ||
2677 | return 0; | |
2678 | } | |
2679 | ||
2680 | static int | |
2681 | htb_query_class__(const struct netdev *netdev, unsigned int handle, | |
2682 | unsigned int parent, struct htb_class *options, | |
2683 | struct netdev_queue_stats *stats) | |
2684 | { | |
2685 | struct ofpbuf *reply; | |
2686 | int error; | |
2687 | ||
2688 | error = tc_query_class(netdev, handle, parent, &reply); | |
2689 | if (!error) { | |
2690 | error = htb_parse_tcmsg__(reply, NULL, options, stats); | |
2691 | ofpbuf_delete(reply); | |
2692 | } | |
2693 | return error; | |
2694 | } | |
2695 | ||
2696 | static int | |
2697 | htb_tc_install(struct netdev *netdev, const struct shash *details) | |
2698 | { | |
2699 | int error; | |
2700 | ||
2701 | error = htb_setup_qdisc__(netdev); | |
2702 | if (!error) { | |
2703 | struct htb_class hc; | |
2704 | ||
2705 | htb_parse_qdisc_details__(netdev, details, &hc); | |
2706 | error = htb_setup_class__(netdev, tc_make_handle(1, 0xfffe), | |
2707 | tc_make_handle(1, 0), &hc); | |
2708 | if (!error) { | |
2709 | htb_install__(netdev, hc.max_rate); | |
2710 | } | |
2711 | } | |
2712 | return error; | |
2713 | } | |
2714 | ||
93b13be8 BP |
2715 | static struct htb_class * |
2716 | htb_class_cast__(const struct tc_queue *queue) | |
2717 | { | |
2718 | return CONTAINER_OF(queue, struct htb_class, tc_queue); | |
2719 | } | |
2720 | ||
c1c9c9c4 BP |
2721 | static void |
2722 | htb_update_queue__(struct netdev *netdev, unsigned int queue_id, | |
2723 | const struct htb_class *hc) | |
2724 | { | |
2725 | struct htb *htb = htb_get__(netdev); | |
93b13be8 BP |
2726 | size_t hash = hash_int(queue_id, 0); |
2727 | struct tc_queue *queue; | |
c1c9c9c4 BP |
2728 | struct htb_class *hcp; |
2729 | ||
93b13be8 BP |
2730 | queue = tc_find_queue__(netdev, queue_id, hash); |
2731 | if (queue) { | |
2732 | hcp = htb_class_cast__(queue); | |
2733 | } else { | |
c1c9c9c4 | 2734 | hcp = xmalloc(sizeof *hcp); |
93b13be8 BP |
2735 | queue = &hcp->tc_queue; |
2736 | queue->queue_id = queue_id; | |
2737 | hmap_insert(&htb->tc.queues, &queue->hmap_node, hash); | |
c1c9c9c4 | 2738 | } |
93b13be8 BP |
2739 | |
2740 | hcp->min_rate = hc->min_rate; | |
2741 | hcp->max_rate = hc->max_rate; | |
2742 | hcp->burst = hc->burst; | |
2743 | hcp->priority = hc->priority; | |
c1c9c9c4 BP |
2744 | } |
2745 | ||
2746 | static int | |
2747 | htb_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED) | |
2748 | { | |
c1c9c9c4 BP |
2749 | struct ofpbuf msg; |
2750 | struct nl_dump dump; | |
2751 | struct htb_class hc; | |
c1c9c9c4 BP |
2752 | |
2753 | /* Get qdisc options. */ | |
2754 | hc.max_rate = 0; | |
2755 | htb_query_class__(netdev, tc_make_handle(1, 0xfffe), 0, &hc, NULL); | |
24045e35 | 2756 | htb_install__(netdev, hc.max_rate); |
c1c9c9c4 BP |
2757 | |
2758 | /* Get queues. */ | |
23a98ffe BP |
2759 | if (!start_queue_dump(netdev, &dump)) { |
2760 | return ENODEV; | |
2761 | } | |
c1c9c9c4 BP |
2762 | while (nl_dump_next(&dump, &msg)) { |
2763 | unsigned int queue_id; | |
2764 | ||
2765 | if (!htb_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) { | |
2766 | htb_update_queue__(netdev, queue_id, &hc); | |
2767 | } | |
2768 | } | |
2769 | nl_dump_done(&dump); | |
2770 | ||
2771 | return 0; | |
2772 | } | |
2773 | ||
2774 | static void | |
2775 | htb_tc_destroy(struct tc *tc) | |
2776 | { | |
2777 | struct htb *htb = CONTAINER_OF(tc, struct htb, tc); | |
93b13be8 | 2778 | struct htb_class *hc, *next; |
c1c9c9c4 | 2779 | |
4e8e4213 | 2780 | HMAP_FOR_EACH_SAFE (hc, next, tc_queue.hmap_node, &htb->tc.queues) { |
93b13be8 | 2781 | hmap_remove(&htb->tc.queues, &hc->tc_queue.hmap_node); |
c1c9c9c4 BP |
2782 | free(hc); |
2783 | } | |
2784 | tc_destroy(tc); | |
2785 | free(htb); | |
2786 | } | |
2787 | ||
2788 | static int | |
2789 | htb_qdisc_get(const struct netdev *netdev, struct shash *details) | |
2790 | { | |
2791 | const struct htb *htb = htb_get__(netdev); | |
2792 | shash_add(details, "max-rate", xasprintf("%llu", 8ULL * htb->max_rate)); | |
2793 | return 0; | |
2794 | } | |
2795 | ||
2796 | static int | |
2797 | htb_qdisc_set(struct netdev *netdev, const struct shash *details) | |
2798 | { | |
2799 | struct htb_class hc; | |
2800 | int error; | |
2801 | ||
2802 | htb_parse_qdisc_details__(netdev, details, &hc); | |
2803 | error = htb_setup_class__(netdev, tc_make_handle(1, 0xfffe), | |
2804 | tc_make_handle(1, 0), &hc); | |
2805 | if (!error) { | |
2806 | htb_get__(netdev)->max_rate = hc.max_rate; | |
2807 | } | |
2808 | return error; | |
2809 | } | |
2810 | ||
2811 | static int | |
93b13be8 BP |
2812 | htb_class_get(const struct netdev *netdev OVS_UNUSED, |
2813 | const struct tc_queue *queue, struct shash *details) | |
c1c9c9c4 | 2814 | { |
93b13be8 | 2815 | const struct htb_class *hc = htb_class_cast__(queue); |
c1c9c9c4 BP |
2816 | |
2817 | shash_add(details, "min-rate", xasprintf("%llu", 8ULL * hc->min_rate)); | |
2818 | if (hc->min_rate != hc->max_rate) { | |
2819 | shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hc->max_rate)); | |
2820 | } | |
2821 | shash_add(details, "burst", xasprintf("%llu", 8ULL * hc->burst)); | |
2822 | if (hc->priority) { | |
2823 | shash_add(details, "priority", xasprintf("%u", hc->priority)); | |
2824 | } | |
2825 | return 0; | |
2826 | } | |
2827 | ||
2828 | static int | |
2829 | htb_class_set(struct netdev *netdev, unsigned int queue_id, | |
2830 | const struct shash *details) | |
2831 | { | |
2832 | struct htb_class hc; | |
2833 | int error; | |
2834 | ||
2835 | error = htb_parse_class_details__(netdev, details, &hc); | |
2836 | if (error) { | |
2837 | return error; | |
2838 | } | |
2839 | ||
17ee3c1f | 2840 | error = htb_setup_class__(netdev, tc_make_handle(1, queue_id + 1), |
c1c9c9c4 BP |
2841 | tc_make_handle(1, 0xfffe), &hc); |
2842 | if (error) { | |
2843 | return error; | |
2844 | } | |
2845 | ||
2846 | htb_update_queue__(netdev, queue_id, &hc); | |
2847 | return 0; | |
2848 | } | |
2849 | ||
2850 | static int | |
93b13be8 | 2851 | htb_class_delete(struct netdev *netdev, struct tc_queue *queue) |
c1c9c9c4 | 2852 | { |
93b13be8 | 2853 | struct htb_class *hc = htb_class_cast__(queue); |
c1c9c9c4 | 2854 | struct htb *htb = htb_get__(netdev); |
c1c9c9c4 BP |
2855 | int error; |
2856 | ||
93b13be8 | 2857 | error = tc_delete_class(netdev, tc_make_handle(1, queue->queue_id + 1)); |
c1c9c9c4 | 2858 | if (!error) { |
93b13be8 | 2859 | hmap_remove(&htb->tc.queues, &hc->tc_queue.hmap_node); |
c1c9c9c4 | 2860 | free(hc); |
c1c9c9c4 BP |
2861 | } |
2862 | return error; | |
2863 | } | |
2864 | ||
2865 | static int | |
93b13be8 | 2866 | htb_class_get_stats(const struct netdev *netdev, const struct tc_queue *queue, |
c1c9c9c4 BP |
2867 | struct netdev_queue_stats *stats) |
2868 | { | |
93b13be8 | 2869 | return htb_query_class__(netdev, tc_make_handle(1, queue->queue_id + 1), |
c1c9c9c4 BP |
2870 | tc_make_handle(1, 0xfffe), NULL, stats); |
2871 | } | |
2872 | ||
2873 | static int | |
2874 | htb_class_dump_stats(const struct netdev *netdev OVS_UNUSED, | |
2875 | const struct ofpbuf *nlmsg, | |
2876 | netdev_dump_queue_stats_cb *cb, void *aux) | |
2877 | { | |
2878 | struct netdev_queue_stats stats; | |
17ee3c1f | 2879 | unsigned int handle, major, minor; |
c1c9c9c4 BP |
2880 | int error; |
2881 | ||
2882 | error = tc_parse_class(nlmsg, &handle, NULL, &stats); | |
2883 | if (error) { | |
2884 | return error; | |
2885 | } | |
2886 | ||
17ee3c1f BP |
2887 | major = tc_get_major(handle); |
2888 | minor = tc_get_minor(handle); | |
2889 | if (major == 1 && minor > 0 && minor <= HTB_N_QUEUES) { | |
d5590e7e | 2890 | (*cb)(minor - 1, &stats, aux); |
c1c9c9c4 BP |
2891 | } |
2892 | return 0; | |
2893 | } | |
2894 | ||
2895 | static const struct tc_ops tc_ops_htb = { | |
2896 | "htb", /* linux_name */ | |
2897 | "linux-htb", /* ovs_name */ | |
2898 | HTB_N_QUEUES, /* n_queues */ | |
2899 | htb_tc_install, | |
2900 | htb_tc_load, | |
2901 | htb_tc_destroy, | |
2902 | htb_qdisc_get, | |
2903 | htb_qdisc_set, | |
2904 | htb_class_get, | |
2905 | htb_class_set, | |
2906 | htb_class_delete, | |
2907 | htb_class_get_stats, | |
2908 | htb_class_dump_stats | |
2909 | }; | |
2910 | \f | |
a339aa81 EJ |
2911 | /* "linux-hfsc" traffic control class. */ |
2912 | ||
2913 | #define HFSC_N_QUEUES 0xf000 | |
2914 | ||
2915 | struct hfsc { | |
2916 | struct tc tc; | |
2917 | uint32_t max_rate; | |
2918 | }; | |
2919 | ||
2920 | struct hfsc_class { | |
2921 | struct tc_queue tc_queue; | |
2922 | uint32_t min_rate; | |
2923 | uint32_t max_rate; | |
2924 | }; | |
2925 | ||
2926 | static struct hfsc * | |
2927 | hfsc_get__(const struct netdev *netdev) | |
2928 | { | |
2929 | struct netdev_dev_linux *netdev_dev; | |
2930 | netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
2931 | return CONTAINER_OF(netdev_dev->tc, struct hfsc, tc); | |
2932 | } | |
2933 | ||
2934 | static struct hfsc_class * | |
2935 | hfsc_class_cast__(const struct tc_queue *queue) | |
2936 | { | |
2937 | return CONTAINER_OF(queue, struct hfsc_class, tc_queue); | |
2938 | } | |
2939 | ||
24045e35 | 2940 | static void |
a339aa81 EJ |
2941 | hfsc_install__(struct netdev *netdev, uint32_t max_rate) |
2942 | { | |
2943 | struct netdev_dev_linux * netdev_dev; | |
2944 | struct hfsc *hfsc; | |
2945 | ||
2946 | netdev_dev = netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
2947 | hfsc = xmalloc(sizeof *hfsc); | |
2948 | tc_init(&hfsc->tc, &tc_ops_hfsc); | |
2949 | hfsc->max_rate = max_rate; | |
2950 | netdev_dev->tc = &hfsc->tc; | |
a339aa81 EJ |
2951 | } |
2952 | ||
2953 | static void | |
2954 | hfsc_update_queue__(struct netdev *netdev, unsigned int queue_id, | |
2955 | const struct hfsc_class *hc) | |
2956 | { | |
2957 | size_t hash; | |
2958 | struct hfsc *hfsc; | |
2959 | struct hfsc_class *hcp; | |
2960 | struct tc_queue *queue; | |
2961 | ||
2962 | hfsc = hfsc_get__(netdev); | |
2963 | hash = hash_int(queue_id, 0); | |
2964 | ||
2965 | queue = tc_find_queue__(netdev, queue_id, hash); | |
2966 | if (queue) { | |
2967 | hcp = hfsc_class_cast__(queue); | |
2968 | } else { | |
2969 | hcp = xmalloc(sizeof *hcp); | |
2970 | queue = &hcp->tc_queue; | |
2971 | queue->queue_id = queue_id; | |
2972 | hmap_insert(&hfsc->tc.queues, &queue->hmap_node, hash); | |
2973 | } | |
2974 | ||
2975 | hcp->min_rate = hc->min_rate; | |
2976 | hcp->max_rate = hc->max_rate; | |
2977 | } | |
2978 | ||
2979 | static int | |
2980 | hfsc_parse_tca_options__(struct nlattr *nl_options, struct hfsc_class *class) | |
2981 | { | |
2982 | const struct tc_service_curve *rsc, *fsc, *usc; | |
2983 | static const struct nl_policy tca_hfsc_policy[] = { | |
2984 | [TCA_HFSC_RSC] = { | |
2985 | .type = NL_A_UNSPEC, | |
2986 | .optional = false, | |
2987 | .min_len = sizeof(struct tc_service_curve), | |
2988 | }, | |
2989 | [TCA_HFSC_FSC] = { | |
2990 | .type = NL_A_UNSPEC, | |
2991 | .optional = false, | |
2992 | .min_len = sizeof(struct tc_service_curve), | |
2993 | }, | |
2994 | [TCA_HFSC_USC] = { | |
2995 | .type = NL_A_UNSPEC, | |
2996 | .optional = false, | |
2997 | .min_len = sizeof(struct tc_service_curve), | |
2998 | }, | |
2999 | }; | |
3000 | struct nlattr *attrs[ARRAY_SIZE(tca_hfsc_policy)]; | |
3001 | ||
3002 | if (!nl_parse_nested(nl_options, tca_hfsc_policy, | |
3003 | attrs, ARRAY_SIZE(tca_hfsc_policy))) { | |
3004 | VLOG_WARN_RL(&rl, "failed to parse HFSC class options"); | |
3005 | return EPROTO; | |
3006 | } | |
3007 | ||
3008 | rsc = nl_attr_get(attrs[TCA_HFSC_RSC]); | |
3009 | fsc = nl_attr_get(attrs[TCA_HFSC_FSC]); | |
3010 | usc = nl_attr_get(attrs[TCA_HFSC_USC]); | |
3011 | ||
3012 | if (rsc->m1 != 0 || rsc->d != 0 || | |
3013 | fsc->m1 != 0 || fsc->d != 0 || | |
3014 | usc->m1 != 0 || usc->d != 0) { | |
3015 | VLOG_WARN_RL(&rl, "failed to parse HFSC class options. " | |
3016 | "Non-linear service curves are not supported."); | |
3017 | return EPROTO; | |
3018 | } | |
3019 | ||
3020 | if (rsc->m2 != fsc->m2) { | |
3021 | VLOG_WARN_RL(&rl, "failed to parse HFSC class options. " | |
3022 | "Real-time service curves are not supported "); | |
3023 | return EPROTO; | |
3024 | } | |
3025 | ||
3026 | if (rsc->m2 > usc->m2) { | |
3027 | VLOG_WARN_RL(&rl, "failed to parse HFSC class options. " | |
3028 | "Min-rate service curve is greater than " | |
3029 | "the max-rate service curve."); | |
3030 | return EPROTO; | |
3031 | } | |
3032 | ||
3033 | class->min_rate = fsc->m2; | |
3034 | class->max_rate = usc->m2; | |
3035 | return 0; | |
3036 | } | |
3037 | ||
3038 | static int | |
3039 | hfsc_parse_tcmsg__(struct ofpbuf *tcmsg, unsigned int *queue_id, | |
3040 | struct hfsc_class *options, | |
3041 | struct netdev_queue_stats *stats) | |
3042 | { | |
3043 | int error; | |
3044 | unsigned int handle; | |
3045 | struct nlattr *nl_options; | |
3046 | ||
3047 | error = tc_parse_class(tcmsg, &handle, &nl_options, stats); | |
3048 | if (error) { | |
3049 | return error; | |
3050 | } | |
3051 | ||
3052 | if (queue_id) { | |
3053 | unsigned int major, minor; | |
3054 | ||
3055 | major = tc_get_major(handle); | |
3056 | minor = tc_get_minor(handle); | |
3057 | if (major == 1 && minor > 0 && minor <= HFSC_N_QUEUES) { | |
3058 | *queue_id = minor - 1; | |
3059 | } else { | |
3060 | return EPROTO; | |
3061 | } | |
3062 | } | |
3063 | ||
3064 | if (options) { | |
3065 | error = hfsc_parse_tca_options__(nl_options, options); | |
3066 | } | |
3067 | ||
3068 | return error; | |
3069 | } | |
3070 | ||
3071 | static int | |
3072 | hfsc_query_class__(const struct netdev *netdev, unsigned int handle, | |
3073 | unsigned int parent, struct hfsc_class *options, | |
3074 | struct netdev_queue_stats *stats) | |
3075 | { | |
3076 | int error; | |
3077 | struct ofpbuf *reply; | |
3078 | ||
3079 | error = tc_query_class(netdev, handle, parent, &reply); | |
3080 | if (error) { | |
3081 | return error; | |
3082 | } | |
3083 | ||
3084 | error = hfsc_parse_tcmsg__(reply, NULL, options, stats); | |
3085 | ofpbuf_delete(reply); | |
3086 | return error; | |
3087 | } | |
3088 | ||
3089 | static void | |
3090 | hfsc_parse_qdisc_details__(struct netdev *netdev, const struct shash *details, | |
3091 | struct hfsc_class *class) | |
3092 | { | |
3093 | uint32_t max_rate; | |
3094 | const char *max_rate_s; | |
3095 | ||
3096 | max_rate_s = shash_find_data(details, "max-rate"); | |
3097 | max_rate = max_rate_s ? strtoull(max_rate_s, NULL, 10) / 8 : 0; | |
3098 | ||
3099 | if (!max_rate) { | |
3100 | uint32_t current; | |
3101 | ||
3102 | netdev_get_features(netdev, ¤t, NULL, NULL, NULL); | |
3103 | max_rate = netdev_features_to_bps(current) / 8; | |
3104 | } | |
3105 | ||
3106 | class->min_rate = max_rate; | |
3107 | class->max_rate = max_rate; | |
3108 | } | |
3109 | ||
3110 | static int | |
3111 | hfsc_parse_class_details__(struct netdev *netdev, | |
3112 | const struct shash *details, | |
3113 | struct hfsc_class * class) | |
3114 | { | |
3115 | const struct hfsc *hfsc; | |
3116 | uint32_t min_rate, max_rate; | |
3117 | const char *min_rate_s, *max_rate_s; | |
3118 | ||
3119 | hfsc = hfsc_get__(netdev); | |
3120 | min_rate_s = shash_find_data(details, "min-rate"); | |
3121 | max_rate_s = shash_find_data(details, "max-rate"); | |
3122 | ||
c45ab5e9 | 3123 | min_rate = min_rate_s ? strtoull(min_rate_s, NULL, 10) / 8 : 0; |
79398bad | 3124 | min_rate = MAX(min_rate, 1); |
a339aa81 EJ |
3125 | min_rate = MIN(min_rate, hfsc->max_rate); |
3126 | ||
3127 | max_rate = (max_rate_s | |
3128 | ? strtoull(max_rate_s, NULL, 10) / 8 | |
3129 | : hfsc->max_rate); | |
3130 | max_rate = MAX(max_rate, min_rate); | |
3131 | max_rate = MIN(max_rate, hfsc->max_rate); | |
3132 | ||
3133 | class->min_rate = min_rate; | |
3134 | class->max_rate = max_rate; | |
3135 | ||
3136 | return 0; | |
3137 | } | |
3138 | ||
3139 | /* Create an HFSC qdisc. | |
3140 | * | |
3141 | * Equivalent to "tc qdisc add dev <dev> root handle 1: hfsc default 1". */ | |
3142 | static int | |
3143 | hfsc_setup_qdisc__(struct netdev * netdev) | |
3144 | { | |
3145 | struct tcmsg *tcmsg; | |
3146 | struct ofpbuf request; | |
3147 | struct tc_hfsc_qopt opt; | |
3148 | ||
3149 | tc_del_qdisc(netdev); | |
3150 | ||
3151 | tcmsg = tc_make_request(netdev, RTM_NEWQDISC, | |
3152 | NLM_F_EXCL | NLM_F_CREATE, &request); | |
3153 | ||
3154 | if (!tcmsg) { | |
3155 | return ENODEV; | |
3156 | } | |
3157 | ||
3158 | tcmsg->tcm_handle = tc_make_handle(1, 0); | |
3159 | tcmsg->tcm_parent = TC_H_ROOT; | |
3160 | ||
3161 | memset(&opt, 0, sizeof opt); | |
3162 | opt.defcls = 1; | |
3163 | ||
3164 | nl_msg_put_string(&request, TCA_KIND, "hfsc"); | |
3165 | nl_msg_put_unspec(&request, TCA_OPTIONS, &opt, sizeof opt); | |
3166 | ||
3167 | return tc_transact(&request, NULL); | |
3168 | } | |
3169 | ||
3170 | /* Create an HFSC class. | |
3171 | * | |
3172 | * Equivalent to "tc class add <dev> parent <parent> classid <handle> hfsc | |
3173 | * sc rate <min_rate> ul rate <max_rate>" */ | |
3174 | static int | |
3175 | hfsc_setup_class__(struct netdev *netdev, unsigned int handle, | |
3176 | unsigned int parent, struct hfsc_class *class) | |
3177 | { | |
3178 | int error; | |
3179 | size_t opt_offset; | |
3180 | struct tcmsg *tcmsg; | |
3181 | struct ofpbuf request; | |
3182 | struct tc_service_curve min, max; | |
3183 | ||
3184 | tcmsg = tc_make_request(netdev, RTM_NEWTCLASS, NLM_F_CREATE, &request); | |
3185 | ||
3186 | if (!tcmsg) { | |
3187 | return ENODEV; | |
3188 | } | |
3189 | ||
3190 | tcmsg->tcm_handle = handle; | |
3191 | tcmsg->tcm_parent = parent; | |
3192 | ||
3193 | min.m1 = 0; | |
3194 | min.d = 0; | |
3195 | min.m2 = class->min_rate; | |
3196 | ||
3197 | max.m1 = 0; | |
3198 | max.d = 0; | |
3199 | max.m2 = class->max_rate; | |
3200 | ||
3201 | nl_msg_put_string(&request, TCA_KIND, "hfsc"); | |
3202 | opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS); | |
3203 | nl_msg_put_unspec(&request, TCA_HFSC_RSC, &min, sizeof min); | |
3204 | nl_msg_put_unspec(&request, TCA_HFSC_FSC, &min, sizeof min); | |
3205 | nl_msg_put_unspec(&request, TCA_HFSC_USC, &max, sizeof max); | |
3206 | nl_msg_end_nested(&request, opt_offset); | |
3207 | ||
3208 | error = tc_transact(&request, NULL); | |
3209 | if (error) { | |
3210 | VLOG_WARN_RL(&rl, "failed to replace %s class %u:%u, parent %u:%u, " | |
3211 | "min-rate %ubps, max-rate %ubps (%s)", | |
3212 | netdev_get_name(netdev), | |
3213 | tc_get_major(handle), tc_get_minor(handle), | |
3214 | tc_get_major(parent), tc_get_minor(parent), | |
3215 | class->min_rate, class->max_rate, strerror(error)); | |
3216 | } | |
3217 | ||
3218 | return error; | |
3219 | } | |
3220 | ||
3221 | static int | |
3222 | hfsc_tc_install(struct netdev *netdev, const struct shash *details) | |
3223 | { | |
3224 | int error; | |
3225 | struct hfsc_class class; | |
3226 | ||
3227 | error = hfsc_setup_qdisc__(netdev); | |
3228 | ||
3229 | if (error) { | |
3230 | return error; | |
3231 | } | |
3232 | ||
3233 | hfsc_parse_qdisc_details__(netdev, details, &class); | |
3234 | error = hfsc_setup_class__(netdev, tc_make_handle(1, 0xfffe), | |
3235 | tc_make_handle(1, 0), &class); | |
3236 | ||
3237 | if (error) { | |
3238 | return error; | |
3239 | } | |
3240 | ||
3241 | hfsc_install__(netdev, class.max_rate); | |
3242 | return 0; | |
3243 | } | |
3244 | ||
3245 | static int | |
3246 | hfsc_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED) | |
3247 | { | |
3248 | struct ofpbuf msg; | |
a339aa81 EJ |
3249 | struct nl_dump dump; |
3250 | struct hfsc_class hc; | |
3251 | ||
3252 | hc.max_rate = 0; | |
3253 | hfsc_query_class__(netdev, tc_make_handle(1, 0xfffe), 0, &hc, NULL); | |
24045e35 | 3254 | hfsc_install__(netdev, hc.max_rate); |
a339aa81 EJ |
3255 | |
3256 | if (!start_queue_dump(netdev, &dump)) { | |
3257 | return ENODEV; | |
3258 | } | |
3259 | ||
3260 | while (nl_dump_next(&dump, &msg)) { | |
3261 | unsigned int queue_id; | |
3262 | ||
3263 | if (!hfsc_parse_tcmsg__(&msg, &queue_id, &hc, NULL)) { | |
3264 | hfsc_update_queue__(netdev, queue_id, &hc); | |
3265 | } | |
3266 | } | |
3267 | ||
3268 | nl_dump_done(&dump); | |
3269 | return 0; | |
3270 | } | |
3271 | ||
3272 | static void | |
3273 | hfsc_tc_destroy(struct tc *tc) | |
3274 | { | |
3275 | struct hfsc *hfsc; | |
3276 | struct hfsc_class *hc, *next; | |
3277 | ||
3278 | hfsc = CONTAINER_OF(tc, struct hfsc, tc); | |
3279 | ||
3280 | HMAP_FOR_EACH_SAFE (hc, next, tc_queue.hmap_node, &hfsc->tc.queues) { | |
3281 | hmap_remove(&hfsc->tc.queues, &hc->tc_queue.hmap_node); | |
3282 | free(hc); | |
3283 | } | |
3284 | ||
3285 | tc_destroy(tc); | |
3286 | free(hfsc); | |
3287 | } | |
3288 | ||
3289 | static int | |
3290 | hfsc_qdisc_get(const struct netdev *netdev, struct shash *details) | |
3291 | { | |
3292 | const struct hfsc *hfsc; | |
3293 | hfsc = hfsc_get__(netdev); | |
3294 | shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hfsc->max_rate)); | |
3295 | return 0; | |
3296 | } | |
3297 | ||
3298 | static int | |
3299 | hfsc_qdisc_set(struct netdev *netdev, const struct shash *details) | |
3300 | { | |
3301 | int error; | |
3302 | struct hfsc_class class; | |
3303 | ||
3304 | hfsc_parse_qdisc_details__(netdev, details, &class); | |
3305 | error = hfsc_setup_class__(netdev, tc_make_handle(1, 0xfffe), | |
3306 | tc_make_handle(1, 0), &class); | |
3307 | ||
3308 | if (!error) { | |
3309 | hfsc_get__(netdev)->max_rate = class.max_rate; | |
3310 | } | |
3311 | ||
3312 | return error; | |
3313 | } | |
3314 | ||
3315 | static int | |
3316 | hfsc_class_get(const struct netdev *netdev OVS_UNUSED, | |
3317 | const struct tc_queue *queue, struct shash *details) | |
3318 | { | |
3319 | const struct hfsc_class *hc; | |
3320 | ||
3321 | hc = hfsc_class_cast__(queue); | |
3322 | shash_add(details, "min-rate", xasprintf("%llu", 8ULL * hc->min_rate)); | |
3323 | if (hc->min_rate != hc->max_rate) { | |
3324 | shash_add(details, "max-rate", xasprintf("%llu", 8ULL * hc->max_rate)); | |
3325 | } | |
3326 | return 0; | |
3327 | } | |
3328 | ||
3329 | static int | |
3330 | hfsc_class_set(struct netdev *netdev, unsigned int queue_id, | |
3331 | const struct shash *details) | |
3332 | { | |
3333 | int error; | |
3334 | struct hfsc_class class; | |
3335 | ||
3336 | error = hfsc_parse_class_details__(netdev, details, &class); | |
3337 | if (error) { | |
3338 | return error; | |
3339 | } | |
3340 | ||
3341 | error = hfsc_setup_class__(netdev, tc_make_handle(1, queue_id + 1), | |
3342 | tc_make_handle(1, 0xfffe), &class); | |
3343 | if (error) { | |
3344 | return error; | |
3345 | } | |
3346 | ||
3347 | hfsc_update_queue__(netdev, queue_id, &class); | |
3348 | return 0; | |
3349 | } | |
3350 | ||
3351 | static int | |
3352 | hfsc_class_delete(struct netdev *netdev, struct tc_queue *queue) | |
3353 | { | |
3354 | int error; | |
3355 | struct hfsc *hfsc; | |
3356 | struct hfsc_class *hc; | |
3357 | ||
3358 | hc = hfsc_class_cast__(queue); | |
3359 | hfsc = hfsc_get__(netdev); | |
3360 | ||
3361 | error = tc_delete_class(netdev, tc_make_handle(1, queue->queue_id + 1)); | |
3362 | if (!error) { | |
3363 | hmap_remove(&hfsc->tc.queues, &hc->tc_queue.hmap_node); | |
3364 | free(hc); | |
3365 | } | |
3366 | return error; | |
3367 | } | |
3368 | ||
3369 | static int | |
3370 | hfsc_class_get_stats(const struct netdev *netdev, const struct tc_queue *queue, | |
3371 | struct netdev_queue_stats *stats) | |
3372 | { | |
3373 | return hfsc_query_class__(netdev, tc_make_handle(1, queue->queue_id + 1), | |
3374 | tc_make_handle(1, 0xfffe), NULL, stats); | |
3375 | } | |
3376 | ||
3377 | static int | |
3378 | hfsc_class_dump_stats(const struct netdev *netdev OVS_UNUSED, | |
3379 | const struct ofpbuf *nlmsg, | |
3380 | netdev_dump_queue_stats_cb *cb, void *aux) | |
3381 | { | |
3382 | struct netdev_queue_stats stats; | |
3383 | unsigned int handle, major, minor; | |
3384 | int error; | |
3385 | ||
3386 | error = tc_parse_class(nlmsg, &handle, NULL, &stats); | |
3387 | if (error) { | |
3388 | return error; | |
3389 | } | |
3390 | ||
3391 | major = tc_get_major(handle); | |
3392 | minor = tc_get_minor(handle); | |
3393 | if (major == 1 && minor > 0 && minor <= HFSC_N_QUEUES) { | |
3394 | (*cb)(minor - 1, &stats, aux); | |
3395 | } | |
3396 | return 0; | |
3397 | } | |
3398 | ||
3399 | static const struct tc_ops tc_ops_hfsc = { | |
3400 | "hfsc", /* linux_name */ | |
3401 | "linux-hfsc", /* ovs_name */ | |
3402 | HFSC_N_QUEUES, /* n_queues */ | |
3403 | hfsc_tc_install, /* tc_install */ | |
3404 | hfsc_tc_load, /* tc_load */ | |
3405 | hfsc_tc_destroy, /* tc_destroy */ | |
3406 | hfsc_qdisc_get, /* qdisc_get */ | |
3407 | hfsc_qdisc_set, /* qdisc_set */ | |
3408 | hfsc_class_get, /* class_get */ | |
3409 | hfsc_class_set, /* class_set */ | |
3410 | hfsc_class_delete, /* class_delete */ | |
3411 | hfsc_class_get_stats, /* class_get_stats */ | |
3412 | hfsc_class_dump_stats /* class_dump_stats */ | |
3413 | }; | |
3414 | \f | |
c1c9c9c4 BP |
3415 | /* "linux-default" traffic control class. |
3416 | * | |
3417 | * This class represents the default, unnamed Linux qdisc. It corresponds to | |
3418 | * the "" (empty string) QoS type in the OVS database. */ | |
3419 | ||
3420 | static void | |
3421 | default_install__(struct netdev *netdev) | |
3422 | { | |
3423 | struct netdev_dev_linux *netdev_dev = | |
3424 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
3425 | static struct tc *tc; | |
3426 | ||
3427 | if (!tc) { | |
3428 | tc = xmalloc(sizeof *tc); | |
3429 | tc_init(tc, &tc_ops_default); | |
3430 | } | |
3431 | netdev_dev->tc = tc; | |
3432 | } | |
3433 | ||
3434 | static int | |
3435 | default_tc_install(struct netdev *netdev, | |
3436 | const struct shash *details OVS_UNUSED) | |
3437 | { | |
3438 | default_install__(netdev); | |
3439 | return 0; | |
3440 | } | |
3441 | ||
3442 | static int | |
3443 | default_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED) | |
3444 | { | |
3445 | default_install__(netdev); | |
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | static const struct tc_ops tc_ops_default = { | |
3450 | NULL, /* linux_name */ | |
3451 | "", /* ovs_name */ | |
3452 | 0, /* n_queues */ | |
3453 | default_tc_install, | |
3454 | default_tc_load, | |
3455 | NULL, /* tc_destroy */ | |
3456 | NULL, /* qdisc_get */ | |
3457 | NULL, /* qdisc_set */ | |
3458 | NULL, /* class_get */ | |
3459 | NULL, /* class_set */ | |
3460 | NULL, /* class_delete */ | |
3461 | NULL, /* class_get_stats */ | |
3462 | NULL /* class_dump_stats */ | |
3463 | }; | |
3464 | \f | |
3465 | /* "linux-other" traffic control class. | |
3466 | * | |
3467 | * */ | |
3468 | ||
3469 | static int | |
3470 | other_tc_load(struct netdev *netdev, struct ofpbuf *nlmsg OVS_UNUSED) | |
3471 | { | |
3472 | struct netdev_dev_linux *netdev_dev = | |
3473 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
3474 | static struct tc *tc; | |
3475 | ||
3476 | if (!tc) { | |
3477 | tc = xmalloc(sizeof *tc); | |
3478 | tc_init(tc, &tc_ops_other); | |
3479 | } | |
3480 | netdev_dev->tc = tc; | |
3481 | return 0; | |
3482 | } | |
3483 | ||
3484 | static const struct tc_ops tc_ops_other = { | |
3485 | NULL, /* linux_name */ | |
3486 | "linux-other", /* ovs_name */ | |
3487 | 0, /* n_queues */ | |
3488 | NULL, /* tc_install */ | |
3489 | other_tc_load, | |
3490 | NULL, /* tc_destroy */ | |
3491 | NULL, /* qdisc_get */ | |
3492 | NULL, /* qdisc_set */ | |
3493 | NULL, /* class_get */ | |
3494 | NULL, /* class_set */ | |
3495 | NULL, /* class_delete */ | |
3496 | NULL, /* class_get_stats */ | |
3497 | NULL /* class_dump_stats */ | |
3498 | }; | |
3499 | \f | |
3500 | /* Traffic control. */ | |
3501 | ||
3502 | /* Number of kernel "tc" ticks per second. */ | |
3503 | static double ticks_per_s; | |
3504 | ||
3505 | /* Number of kernel "jiffies" per second. This is used for the purpose of | |
3506 | * computing buffer sizes. Generally kernel qdiscs need to be able to buffer | |
3507 | * one jiffy's worth of data. | |
3508 | * | |
3509 | * There are two possibilities here: | |
3510 | * | |
3511 | * - 'buffer_hz' is the kernel's real timer tick rate, a small number in the | |
3512 | * approximate range of 100 to 1024. That means that we really need to | |
3513 | * make sure that the qdisc can buffer that much data. | |
3514 | * | |
3515 | * - 'buffer_hz' is an absurdly large number. That means that the kernel | |
3516 | * has finely granular timers and there's no need to fudge additional room | |
3517 | * for buffers. (There's no extra effort needed to implement that: the | |
3518 | * large 'buffer_hz' is used as a divisor, so practically any number will | |
3519 | * come out as 0 in the division. Small integer results in the case of | |
3520 | * really high dividends won't have any real effect anyhow.) | |
3521 | */ | |
3522 | static unsigned int buffer_hz; | |
3523 | ||
3524 | /* Returns tc handle 'major':'minor'. */ | |
3525 | static unsigned int | |
3526 | tc_make_handle(unsigned int major, unsigned int minor) | |
3527 | { | |
3528 | return TC_H_MAKE(major << 16, minor); | |
3529 | } | |
3530 | ||
3531 | /* Returns the major number from 'handle'. */ | |
3532 | static unsigned int | |
3533 | tc_get_major(unsigned int handle) | |
3534 | { | |
3535 | return TC_H_MAJ(handle) >> 16; | |
3536 | } | |
3537 | ||
3538 | /* Returns the minor number from 'handle'. */ | |
3539 | static unsigned int | |
3540 | tc_get_minor(unsigned int handle) | |
3541 | { | |
3542 | return TC_H_MIN(handle); | |
3543 | } | |
3544 | ||
3545 | static struct tcmsg * | |
3546 | tc_make_request(const struct netdev *netdev, int type, unsigned int flags, | |
3547 | struct ofpbuf *request) | |
3548 | { | |
3549 | struct tcmsg *tcmsg; | |
3550 | int ifindex; | |
3551 | int error; | |
3552 | ||
3553 | error = get_ifindex(netdev, &ifindex); | |
3554 | if (error) { | |
3555 | return NULL; | |
3556 | } | |
3557 | ||
3558 | ofpbuf_init(request, 512); | |
3559 | nl_msg_put_nlmsghdr(request, sizeof *tcmsg, type, NLM_F_REQUEST | flags); | |
3560 | tcmsg = ofpbuf_put_zeros(request, sizeof *tcmsg); | |
3561 | tcmsg->tcm_family = AF_UNSPEC; | |
3562 | tcmsg->tcm_ifindex = ifindex; | |
3563 | /* Caller should fill in tcmsg->tcm_handle. */ | |
3564 | /* Caller should fill in tcmsg->tcm_parent. */ | |
3565 | ||
3566 | return tcmsg; | |
3567 | } | |
3568 | ||
3569 | static int | |
3570 | tc_transact(struct ofpbuf *request, struct ofpbuf **replyp) | |
3571 | { | |
3572 | int error = nl_sock_transact(rtnl_sock, request, replyp); | |
3573 | ofpbuf_uninit(request); | |
3574 | return error; | |
3575 | } | |
3576 | ||
3577 | static void | |
3578 | read_psched(void) | |
3579 | { | |
3580 | /* The values in psched are not individually very meaningful, but they are | |
3581 | * important. The tables below show some values seen in the wild. | |
3582 | * | |
3583 | * Some notes: | |
3584 | * | |
3585 | * - "c" has always been a constant 1000000 since at least Linux 2.4.14. | |
3586 | * (Before that, there are hints that it was 1000000000.) | |
3587 | * | |
3588 | * - "d" can be unrealistically large, see the comment on 'buffer_hz' | |
3589 | * above. | |
3590 | * | |
3591 | * /proc/net/psched | |
3592 | * ----------------------------------- | |
3593 | * [1] 000c8000 000f4240 000f4240 00000064 | |
3594 | * [2] 000003e8 00000400 000f4240 3b9aca00 | |
3595 | * [3] 000003e8 00000400 000f4240 3b9aca00 | |
3596 | * [4] 000003e8 00000400 000f4240 00000064 | |
3597 | * [5] 000003e8 00000040 000f4240 3b9aca00 | |
3598 | * [6] 000003e8 00000040 000f4240 000000f9 | |
3599 | * | |
3600 | * a b c d ticks_per_s buffer_hz | |
3601 | * ------- --------- ---------- ------------- ----------- ------------- | |
3602 | * [1] 819,200 1,000,000 1,000,000 100 819,200 100 | |
3603 | * [2] 1,000 1,024 1,000,000 1,000,000,000 976,562 1,000,000,000 | |
3604 | * [3] 1,000 1,024 1,000,000 1,000,000,000 976,562 1,000,000,000 | |
3605 | * [4] 1,000 1,024 1,000,000 100 976,562 100 | |
3606 | * [5] 1,000 64 1,000,000 1,000,000,000 15,625,000 1,000,000,000 | |
3607 | * [6] 1,000 64 1,000,000 249 15,625,000 249 | |
3608 | * | |
3609 | * [1] 2.6.18-128.1.6.el5.xs5.5.0.505.1024xen from XenServer 5.5.0-24648p | |
3610 | * [2] 2.6.26-1-686-bigmem from Debian lenny | |
3611 | * [3] 2.6.26-2-sparc64 from Debian lenny | |
3612 | * [4] 2.6.27.42-0.1.1.xs5.6.810.44.111163xen from XenServer 5.6.810-31078p | |
3613 | * [5] 2.6.32.21.22 (approx.) from Ubuntu 10.04 on VMware Fusion | |
3614 | * [6] 2.6.34 from kernel.org on KVM | |
3615 | */ | |
3616 | static const char fn[] = "/proc/net/psched"; | |
3617 | unsigned int a, b, c, d; | |
3618 | FILE *stream; | |
3619 | ||
3620 | ticks_per_s = 1.0; | |
3621 | buffer_hz = 100; | |
3622 | ||
3623 | stream = fopen(fn, "r"); | |
3624 | if (!stream) { | |
3625 | VLOG_WARN("%s: open failed: %s", fn, strerror(errno)); | |
3626 | return; | |
3627 | } | |
3628 | ||
3629 | if (fscanf(stream, "%x %x %x %x", &a, &b, &c, &d) != 4) { | |
3630 | VLOG_WARN("%s: read failed", fn); | |
3631 | fclose(stream); | |
3632 | return; | |
3633 | } | |
3634 | VLOG_DBG("%s: psched parameters are: %u %u %u %u", fn, a, b, c, d); | |
3635 | fclose(stream); | |
3636 | ||
3637 | if (!a || !c) { | |
3638 | VLOG_WARN("%s: invalid scheduler parameters", fn); | |
3639 | return; | |
3640 | } | |
3641 | ||
3642 | ticks_per_s = (double) a * c / b; | |
3643 | if (c == 1000000) { | |
3644 | buffer_hz = d; | |
3645 | } else { | |
3646 | VLOG_WARN("%s: unexpected psched parameters: %u %u %u %u", | |
3647 | fn, a, b, c, d); | |
3648 | } | |
3649 | VLOG_DBG("%s: ticks_per_s=%f buffer_hz=%u", fn, ticks_per_s, buffer_hz); | |
3650 | } | |
3651 | ||
3652 | /* Returns the number of bytes that can be transmitted in 'ticks' ticks at a | |
3653 | * rate of 'rate' bytes per second. */ | |
3654 | static unsigned int | |
3655 | tc_ticks_to_bytes(unsigned int rate, unsigned int ticks) | |
3656 | { | |
3657 | if (!buffer_hz) { | |
3658 | read_psched(); | |
3659 | } | |
3660 | return (rate * ticks) / ticks_per_s; | |
3661 | } | |
3662 | ||
3663 | /* Returns the number of ticks that it would take to transmit 'size' bytes at a | |
3664 | * rate of 'rate' bytes per second. */ | |
3665 | static unsigned int | |
3666 | tc_bytes_to_ticks(unsigned int rate, unsigned int size) | |
3667 | { | |
3668 | if (!buffer_hz) { | |
3669 | read_psched(); | |
3670 | } | |
015c93a4 | 3671 | return rate ? ((unsigned long long int) ticks_per_s * size) / rate : 0; |
c1c9c9c4 BP |
3672 | } |
3673 | ||
3674 | /* Returns the number of bytes that need to be reserved for qdisc buffering at | |
3675 | * a transmission rate of 'rate' bytes per second. */ | |
3676 | static unsigned int | |
3677 | tc_buffer_per_jiffy(unsigned int rate) | |
3678 | { | |
3679 | if (!buffer_hz) { | |
3680 | read_psched(); | |
3681 | } | |
3682 | return rate / buffer_hz; | |
3683 | } | |
3684 | ||
3685 | /* Given Netlink 'msg' that describes a qdisc, extracts the name of the qdisc, | |
3686 | * e.g. "htb", into '*kind' (if it is nonnull). If 'options' is nonnull, | |
3687 | * extracts 'msg''s TCA_OPTIONS attributes into '*options' if it is present or | |
3688 | * stores NULL into it if it is absent. | |
3689 | * | |
3690 | * '*kind' and '*options' point into 'msg', so they are owned by whoever owns | |
3691 | * 'msg'. | |
3692 | * | |
3693 | * Returns 0 if successful, otherwise a positive errno value. */ | |
3694 | static int | |
3695 | tc_parse_qdisc(const struct ofpbuf *msg, const char **kind, | |
3696 | struct nlattr **options) | |
3697 | { | |
3698 | static const struct nl_policy tca_policy[] = { | |
3699 | [TCA_KIND] = { .type = NL_A_STRING, .optional = false }, | |
3700 | [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = true }, | |
3701 | }; | |
3702 | struct nlattr *ta[ARRAY_SIZE(tca_policy)]; | |
3703 | ||
3704 | if (!nl_policy_parse(msg, NLMSG_HDRLEN + sizeof(struct tcmsg), | |
3705 | tca_policy, ta, ARRAY_SIZE(ta))) { | |
3706 | VLOG_WARN_RL(&rl, "failed to parse qdisc message"); | |
3707 | goto error; | |
3708 | } | |
3709 | ||
3710 | if (kind) { | |
3711 | *kind = nl_attr_get_string(ta[TCA_KIND]); | |
3712 | } | |
3713 | ||
3714 | if (options) { | |
3715 | *options = ta[TCA_OPTIONS]; | |
3716 | } | |
3717 | ||
3718 | return 0; | |
3719 | ||
3720 | error: | |
3721 | if (kind) { | |
3722 | *kind = NULL; | |
3723 | } | |
3724 | if (options) { | |
3725 | *options = NULL; | |
3726 | } | |
3727 | return EPROTO; | |
3728 | } | |
3729 | ||
3730 | /* Given Netlink 'msg' that describes a class, extracts the queue ID (e.g. the | |
3731 | * minor number of its class ID) into '*queue_id', its TCA_OPTIONS attribute | |
3732 | * into '*options', and its queue statistics into '*stats'. Any of the output | |
3733 | * arguments may be null. | |
3734 | * | |
3735 | * Returns 0 if successful, otherwise a positive errno value. */ | |
3736 | static int | |
3737 | tc_parse_class(const struct ofpbuf *msg, unsigned int *handlep, | |
3738 | struct nlattr **options, struct netdev_queue_stats *stats) | |
3739 | { | |
3740 | static const struct nl_policy tca_policy[] = { | |
3741 | [TCA_OPTIONS] = { .type = NL_A_NESTED, .optional = false }, | |
3742 | [TCA_STATS2] = { .type = NL_A_NESTED, .optional = false }, | |
3743 | }; | |
3744 | struct nlattr *ta[ARRAY_SIZE(tca_policy)]; | |
3745 | ||
3746 | if (!nl_policy_parse(msg, NLMSG_HDRLEN + sizeof(struct tcmsg), | |
3747 | tca_policy, ta, ARRAY_SIZE(ta))) { | |
3748 | VLOG_WARN_RL(&rl, "failed to parse class message"); | |
3749 | goto error; | |
3750 | } | |
3751 | ||
3752 | if (handlep) { | |
3753 | struct tcmsg *tc = ofpbuf_at_assert(msg, NLMSG_HDRLEN, sizeof *tc); | |
3754 | *handlep = tc->tcm_handle; | |
3755 | } | |
3756 | ||
3757 | if (options) { | |
3758 | *options = ta[TCA_OPTIONS]; | |
3759 | } | |
3760 | ||
3761 | if (stats) { | |
3762 | const struct gnet_stats_queue *gsq; | |
3763 | struct gnet_stats_basic gsb; | |
3764 | ||
3765 | static const struct nl_policy stats_policy[] = { | |
3766 | [TCA_STATS_BASIC] = { .type = NL_A_UNSPEC, .optional = false, | |
3767 | .min_len = sizeof gsb }, | |
3768 | [TCA_STATS_QUEUE] = { .type = NL_A_UNSPEC, .optional = false, | |
3769 | .min_len = sizeof *gsq }, | |
3770 | }; | |
3771 | struct nlattr *sa[ARRAY_SIZE(stats_policy)]; | |
3772 | ||
3773 | if (!nl_parse_nested(ta[TCA_STATS2], stats_policy, | |
3774 | sa, ARRAY_SIZE(sa))) { | |
3775 | VLOG_WARN_RL(&rl, "failed to parse class stats"); | |
3776 | goto error; | |
3777 | } | |
3778 | ||
3779 | /* Alignment issues screw up the length of struct gnet_stats_basic on | |
3780 | * some arch/bitsize combinations. Newer versions of Linux have a | |
3781 | * struct gnet_stats_basic_packed, but we can't depend on that. The | |
3782 | * easiest thing to do is just to make a copy. */ | |
3783 | memset(&gsb, 0, sizeof gsb); | |
3784 | memcpy(&gsb, nl_attr_get(sa[TCA_STATS_BASIC]), | |
3785 | MIN(nl_attr_get_size(sa[TCA_STATS_BASIC]), sizeof gsb)); | |
3786 | stats->tx_bytes = gsb.bytes; | |
3787 | stats->tx_packets = gsb.packets; | |
3788 | ||
3789 | gsq = nl_attr_get(sa[TCA_STATS_QUEUE]); | |
3790 | stats->tx_errors = gsq->drops; | |
3791 | } | |
3792 | ||
3793 | return 0; | |
3794 | ||
3795 | error: | |
3796 | if (options) { | |
3797 | *options = NULL; | |
3798 | } | |
3799 | if (stats) { | |
3800 | memset(stats, 0, sizeof *stats); | |
3801 | } | |
3802 | return EPROTO; | |
3803 | } | |
3804 | ||
3805 | /* Queries the kernel for class with identifier 'handle' and parent 'parent' | |
3806 | * on 'netdev'. */ | |
3807 | static int | |
3808 | tc_query_class(const struct netdev *netdev, | |
3809 | unsigned int handle, unsigned int parent, | |
3810 | struct ofpbuf **replyp) | |
3811 | { | |
3812 | struct ofpbuf request; | |
3813 | struct tcmsg *tcmsg; | |
3814 | int error; | |
3815 | ||
3816 | tcmsg = tc_make_request(netdev, RTM_GETTCLASS, NLM_F_ECHO, &request); | |
23a98ffe BP |
3817 | if (!tcmsg) { |
3818 | return ENODEV; | |
3819 | } | |
c1c9c9c4 BP |
3820 | tcmsg->tcm_handle = handle; |
3821 | tcmsg->tcm_parent = parent; | |
3822 | ||
3823 | error = tc_transact(&request, replyp); | |
3824 | if (error) { | |
3825 | VLOG_WARN_RL(&rl, "query %s class %u:%u (parent %u:%u) failed (%s)", | |
3826 | netdev_get_name(netdev), | |
3827 | tc_get_major(handle), tc_get_minor(handle), | |
3828 | tc_get_major(parent), tc_get_minor(parent), | |
3829 | strerror(error)); | |
3830 | } | |
3831 | return error; | |
3832 | } | |
3833 | ||
3834 | /* Equivalent to "tc class del dev <name> handle <handle>". */ | |
3835 | static int | |
3836 | tc_delete_class(const struct netdev *netdev, unsigned int handle) | |
3837 | { | |
3838 | struct ofpbuf request; | |
3839 | struct tcmsg *tcmsg; | |
3840 | int error; | |
3841 | ||
3842 | tcmsg = tc_make_request(netdev, RTM_DELTCLASS, 0, &request); | |
23a98ffe BP |
3843 | if (!tcmsg) { |
3844 | return ENODEV; | |
3845 | } | |
c1c9c9c4 BP |
3846 | tcmsg->tcm_handle = handle; |
3847 | tcmsg->tcm_parent = 0; | |
3848 | ||
3849 | error = tc_transact(&request, NULL); | |
3850 | if (error) { | |
3851 | VLOG_WARN_RL(&rl, "delete %s class %u:%u failed (%s)", | |
3852 | netdev_get_name(netdev), | |
3853 | tc_get_major(handle), tc_get_minor(handle), | |
3854 | strerror(error)); | |
3855 | } | |
3856 | return error; | |
3857 | } | |
3858 | ||
3859 | /* Equivalent to "tc qdisc del dev <name> root". */ | |
3860 | static int | |
3861 | tc_del_qdisc(struct netdev *netdev) | |
3862 | { | |
3863 | struct netdev_dev_linux *netdev_dev = | |
3864 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
3865 | struct ofpbuf request; | |
3866 | struct tcmsg *tcmsg; | |
3867 | int error; | |
3868 | ||
3869 | tcmsg = tc_make_request(netdev, RTM_DELQDISC, 0, &request); | |
23a98ffe BP |
3870 | if (!tcmsg) { |
3871 | return ENODEV; | |
3872 | } | |
c1c9c9c4 BP |
3873 | tcmsg->tcm_handle = tc_make_handle(1, 0); |
3874 | tcmsg->tcm_parent = TC_H_ROOT; | |
3875 | ||
3876 | error = tc_transact(&request, NULL); | |
3877 | if (error == EINVAL) { | |
3878 | /* EINVAL probably means that the default qdisc was in use, in which | |
3879 | * case we've accomplished our purpose. */ | |
3880 | error = 0; | |
3881 | } | |
3882 | if (!error && netdev_dev->tc) { | |
3883 | if (netdev_dev->tc->ops->tc_destroy) { | |
3884 | netdev_dev->tc->ops->tc_destroy(netdev_dev->tc); | |
3885 | } | |
3886 | netdev_dev->tc = NULL; | |
3887 | } | |
3888 | return error; | |
3889 | } | |
3890 | ||
3891 | /* If 'netdev''s qdisc type and parameters are not yet known, queries the | |
3892 | * kernel to determine what they are. Returns 0 if successful, otherwise a | |
3893 | * positive errno value. */ | |
3894 | static int | |
3895 | tc_query_qdisc(const struct netdev *netdev) | |
3896 | { | |
3897 | struct netdev_dev_linux *netdev_dev = | |
3898 | netdev_dev_linux_cast(netdev_get_dev(netdev)); | |
3899 | struct ofpbuf request, *qdisc; | |
3900 | const struct tc_ops *ops; | |
3901 | struct tcmsg *tcmsg; | |
3902 | int load_error; | |
3903 | int error; | |
3904 | ||
3905 | if (netdev_dev->tc) { | |
3906 | return 0; | |
3907 | } | |
3908 | ||
3909 | /* This RTM_GETQDISC is crafted to avoid OOPSing kernels that do not have | |
3910 | * commit 53b0f08 "net_sched: Fix qdisc_notify()", which is anything before | |
3911 | * 2.6.35 without that fix backported to it. | |
3912 | * | |
3913 | * To avoid the OOPS, we must not make a request that would attempt to dump | |
3914 | * a "built-in" qdisc, that is, the default pfifo_fast qdisc or one of a | |
3915 | * few others. There are a few ways that I can see to do this, but most of | |
3916 | * them seem to be racy (and if you lose the race the kernel OOPSes). The | |
3917 | * technique chosen here is to assume that any non-default qdisc that we | |
3918 | * create will have a class with handle 1:0. The built-in qdiscs only have | |
3919 | * a class with handle 0:0. | |
3920 | * | |
3921 | * We could check for Linux 2.6.35+ and use a more straightforward method | |
3922 | * there. */ | |
3923 | tcmsg = tc_make_request(netdev, RTM_GETQDISC, NLM_F_ECHO, &request); | |
23a98ffe BP |
3924 | if (!tcmsg) { |
3925 | return ENODEV; | |
3926 | } | |
c1c9c9c4 BP |
3927 | tcmsg->tcm_handle = tc_make_handle(1, 0); |
3928 | tcmsg->tcm_parent = 0; | |
3929 | ||
3930 | /* Figure out what tc class to instantiate. */ | |
3931 | error = tc_transact(&request, &qdisc); | |
3932 | if (!error) { | |
3933 | const char *kind; | |
3934 | ||
3935 | error = tc_parse_qdisc(qdisc, &kind, NULL); | |
3936 | if (error) { | |
3937 | ops = &tc_ops_other; | |
3938 | } else { | |
3939 | ops = tc_lookup_linux_name(kind); | |
3940 | if (!ops) { | |
3941 | static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 1); | |
3942 | VLOG_INFO_RL(&rl2, "unknown qdisc \"%s\"", kind); | |
3943 | ||
3944 | ops = &tc_ops_other; | |
3945 | } | |
3946 | } | |
3947 | } else if (error == ENOENT) { | |
3948 | /* Either it's a built-in qdisc, or it's a qdisc set up by some | |
3949 | * other entity that doesn't have a handle 1:0. We will assume | |
3950 | * that it's the system default qdisc. */ | |
3951 | ops = &tc_ops_default; | |
3952 | error = 0; | |
3953 | } else { | |
3954 | /* Who knows? Maybe the device got deleted. */ | |
3955 | VLOG_WARN_RL(&rl, "query %s qdisc failed (%s)", | |
3956 | netdev_get_name(netdev), strerror(error)); | |
3957 | ops = &tc_ops_other; | |
3958 | } | |
3959 | ||
3960 | /* Instantiate it. */ | |
3961 | load_error = ops->tc_load((struct netdev *) netdev, qdisc); | |
3962 | assert((load_error == 0) == (netdev_dev->tc != NULL)); | |
3963 | ofpbuf_delete(qdisc); | |
3964 | ||
3965 | return error ? error : load_error; | |
3966 | } | |
3967 | ||
3968 | /* Linux traffic control uses tables with 256 entries ("rtab" tables) to | |
3969 | approximate the time to transmit packets of various lengths. For an MTU of | |
3970 | 256 or less, each entry is exact; for an MTU of 257 through 512, each entry | |
3971 | represents two possible packet lengths; for a MTU of 513 through 1024, four | |
3972 | possible lengths; and so on. | |
3973 | ||
3974 | Returns, for the specified 'mtu', the number of bits that packet lengths | |
3975 | need to be shifted right to fit within such a 256-entry table. */ | |
3976 | static int | |
3977 | tc_calc_cell_log(unsigned int mtu) | |
3978 | { | |
3979 | int cell_log; | |
3980 | ||
3981 | if (!mtu) { | |
3982 | mtu = ETH_PAYLOAD_MAX; | |
3983 | } | |
3984 | mtu += ETH_HEADER_LEN + VLAN_HEADER_LEN; | |
3985 | ||
3986 | for (cell_log = 0; mtu >= 256; cell_log++) { | |
3987 | mtu >>= 1; | |
3988 | } | |
3989 | ||
3990 | return cell_log; | |
3991 | } | |
3992 | ||
3993 | /* Initializes 'rate' properly for a rate of 'Bps' bytes per second with an MTU | |
3994 | * of 'mtu'. */ | |
3995 | static void | |
3996 | tc_fill_rate(struct tc_ratespec *rate, uint64_t Bps, int mtu) | |
3997 | { | |
3998 | memset(rate, 0, sizeof *rate); | |
3999 | rate->cell_log = tc_calc_cell_log(mtu); | |
4000 | /* rate->overhead = 0; */ /* New in 2.6.24, not yet in some */ | |
4001 | /* rate->cell_align = 0; */ /* distro headers. */ | |
4002 | rate->mpu = ETH_TOTAL_MIN; | |
4003 | rate->rate = Bps; | |
4004 | } | |
4005 | ||
4006 | /* Appends to 'msg' an "rtab" table for the specified 'rate' as a Netlink | |
4007 | * attribute of the specified "type". | |
4008 | * | |
4009 | * See tc_calc_cell_log() above for a description of "rtab"s. */ | |
4010 | static void | |
4011 | tc_put_rtab(struct ofpbuf *msg, uint16_t type, const struct tc_ratespec *rate) | |
4012 | { | |
4013 | uint32_t *rtab; | |
4014 | unsigned int i; | |
4015 | ||
4016 | rtab = nl_msg_put_unspec_uninit(msg, type, TC_RTAB_SIZE); | |
4017 | for (i = 0; i < TC_RTAB_SIZE / sizeof *rtab; i++) { | |
4018 | unsigned packet_size = (i + 1) << rate->cell_log; | |
4019 | if (packet_size < rate->mpu) { | |
4020 | packet_size = rate->mpu; | |
4021 | } | |
4022 | rtab[i] = tc_bytes_to_ticks(rate->rate, packet_size); | |
4023 | } | |
4024 | } | |
4025 | ||
4026 | /* Calculates the proper value of 'buffer' or 'cbuffer' in HTB options given a | |
4027 | * rate of 'Bps' bytes per second, the specified 'mtu', and a user-requested | |
4028 | * burst size of 'burst_bytes'. (If no value was requested, a 'burst_bytes' of | |
015c93a4 | 4029 | * 0 is fine.) */ |
c1c9c9c4 BP |
4030 | static int |
4031 | tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes) | |
4032 | { | |
4033 | unsigned int min_burst = tc_buffer_per_jiffy(Bps) + mtu; | |
4034 | return tc_bytes_to_ticks(Bps, MAX(burst_bytes, min_burst)); | |
4035 | } | |
d3980822 | 4036 | \f |
d3980822 | 4037 | /* Copies 'src' into 'dst', performing format conversion in the process. */ |
f613a0d7 | 4038 | static void |
d3980822 BP |
4039 | netdev_stats_from_rtnl_link_stats(struct netdev_stats *dst, |
4040 | const struct rtnl_link_stats *src) | |
4041 | { | |
f613a0d7 PS |
4042 | dst->rx_packets = src->rx_packets; |
4043 | dst->tx_packets = src->tx_packets; | |
4044 | dst->rx_bytes = src->rx_bytes; | |
4045 | dst->tx_bytes = src->tx_bytes; | |
4046 | dst->rx_errors = src->rx_errors; | |
4047 | dst->tx_errors = src->tx_errors; | |
4048 | dst->rx_dropped = src->rx_dropped; | |
4049 | dst->tx_dropped = src->tx_dropped; | |
4050 | dst->multicast = src->multicast; | |
4051 | dst->collisions = src->collisions; | |
4052 | dst->rx_length_errors = src->rx_length_errors; | |
4053 | dst->rx_over_errors = src->rx_over_errors; | |
4054 | dst->rx_crc_errors = src->rx_crc_errors; | |
4055 | dst->rx_frame_errors = src->rx_frame_errors; | |
4056 | dst->rx_fifo_errors = src->rx_fifo_errors; | |
4057 | dst->rx_missed_errors = src->rx_missed_errors; | |
4058 | dst->tx_aborted_errors = src->tx_aborted_errors; | |
4059 | dst->tx_carrier_errors = src->tx_carrier_errors; | |
4060 | dst->tx_fifo_errors = src->tx_fifo_errors; | |
4061 | dst->tx_heartbeat_errors = src->tx_heartbeat_errors; | |
4062 | dst->tx_window_errors = src->tx_window_errors; | |
d3980822 BP |
4063 | } |
4064 | ||
c1c9c9c4 BP |
4065 | \f |
4066 | /* Utility functions. */ | |
4067 | ||
4068 | static int | |
4069 | get_stats_via_netlink(int ifindex, struct netdev_stats *stats) | |
4070 | { | |
4071 | /* Policy for RTNLGRP_LINK messages. | |
4072 | * | |
4073 | * There are *many* more fields in these messages, but currently we only | |
4074 | * care about these fields. */ | |
4075 | static const struct nl_policy rtnlgrp_link_policy[] = { | |
4076 | [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false }, | |
4077 | [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true, | |
4078 | .min_len = sizeof(struct rtnl_link_stats) }, | |
4079 | }; | |
4080 | ||
4081 | struct ofpbuf request; | |
4082 | struct ofpbuf *reply; | |
4083 | struct ifinfomsg *ifi; | |
c1c9c9c4 BP |
4084 | struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)]; |
4085 | int error; | |
4086 | ||
4087 | ofpbuf_init(&request, 0); | |
4088 | nl_msg_put_nlmsghdr(&request, sizeof *ifi, RTM_GETLINK, NLM_F_REQUEST); | |
4089 | ifi = ofpbuf_put_zeros(&request, sizeof *ifi); | |
4090 | ifi->ifi_family = PF_UNSPEC; | |
4091 | ifi->ifi_index = ifindex; | |
4092 | error = nl_sock_transact(rtnl_sock, &request, &reply); | |
4093 | ofpbuf_uninit(&request); | |
4094 | if (error) { | |
4095 | return error; | |
4096 | } | |
4097 | ||
4098 | if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg), | |
4099 | rtnlgrp_link_policy, | |
4100 | attrs, ARRAY_SIZE(rtnlgrp_link_policy))) { | |
4101 | ofpbuf_delete(reply); | |
4102 | return EPROTO; | |
4103 | } | |
4104 | ||
4105 | if (!attrs[IFLA_STATS]) { | |
4106 | VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats"); | |
4107 | ofpbuf_delete(reply); | |
4108 | return EPROTO; | |
4109 | } | |
8b61709d | 4110 | |
d3980822 | 4111 | netdev_stats_from_rtnl_link_stats(stats, nl_attr_get(attrs[IFLA_STATS])); |
8b61709d | 4112 | |
576e26d7 BP |
4113 | ofpbuf_delete(reply); |
4114 | ||
8b61709d BP |
4115 | return 0; |
4116 | } | |
4117 | ||
4118 | static int | |
4119 | get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats) | |
4120 | { | |
4121 | static const char fn[] = "/proc/net/dev"; | |
4122 | char line[1024]; | |
4123 | FILE *stream; | |
4124 | int ln; | |
4125 | ||
4126 | stream = fopen(fn, "r"); | |
4127 | if (!stream) { | |
4128 | VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno)); | |
4129 | return errno; | |
4130 | } | |
4131 | ||
4132 | ln = 0; | |
4133 | while (fgets(line, sizeof line, stream)) { | |
4134 | if (++ln >= 3) { | |
4135 | char devname[16]; | |
4136 | #define X64 "%"SCNu64 | |
4137 | if (sscanf(line, | |
4138 | " %15[^:]:" | |
4139 | X64 X64 X64 X64 X64 X64 X64 "%*u" | |
4140 | X64 X64 X64 X64 X64 X64 X64 "%*u", | |
4141 | devname, | |
4142 | &stats->rx_bytes, | |
4143 | &stats->rx_packets, | |
4144 | &stats->rx_errors, | |
4145 | &stats->rx_dropped, | |
4146 | &stats->rx_fifo_errors, | |
4147 | &stats->rx_frame_errors, | |
4148 | &stats->multicast, | |
4149 | &stats->tx_bytes, | |
4150 | &stats->tx_packets, | |
4151 | &stats->tx_errors, | |
4152 | &stats->tx_dropped, | |
4153 | &stats->tx_fifo_errors, | |
4154 | &stats->collisions, | |
4155 | &stats->tx_carrier_errors) != 15) { | |
4156 | VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln); | |
4157 | } else if (!strcmp(devname, netdev_name)) { | |
4158 | stats->rx_length_errors = UINT64_MAX; | |
4159 | stats->rx_over_errors = UINT64_MAX; | |
4160 | stats->rx_crc_errors = UINT64_MAX; | |
4161 | stats->rx_missed_errors = UINT64_MAX; | |
4162 | stats->tx_aborted_errors = UINT64_MAX; | |
4163 | stats->tx_heartbeat_errors = UINT64_MAX; | |
4164 | stats->tx_window_errors = UINT64_MAX; | |
4165 | fclose(stream); | |
4166 | return 0; | |
4167 | } | |
4168 | } | |
4169 | } | |
4170 | VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name); | |
4171 | fclose(stream); | |
4172 | return ENODEV; | |
4173 | } | |
c1c9c9c4 | 4174 | |
8b61709d BP |
4175 | static int |
4176 | get_flags(const struct netdev *netdev, int *flags) | |
4177 | { | |
4178 | struct ifreq ifr; | |
4179 | int error; | |
4180 | ||
149f577a JG |
4181 | error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCGIFFLAGS, |
4182 | "SIOCGIFFLAGS"); | |
8b61709d BP |
4183 | *flags = ifr.ifr_flags; |
4184 | return error; | |
4185 | } | |
4186 | ||
4187 | static int | |
4188 | set_flags(struct netdev *netdev, int flags) | |
4189 | { | |
4190 | struct ifreq ifr; | |
4191 | ||
4192 | ifr.ifr_flags = flags; | |
149f577a JG |
4193 | return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCSIFFLAGS, |
4194 | "SIOCSIFFLAGS"); | |
8b61709d BP |
4195 | } |
4196 | ||
4197 | static int | |
4198 | do_get_ifindex(const char *netdev_name) | |
4199 | { | |
4200 | struct ifreq ifr; | |
4201 | ||
71d7c22f | 4202 | ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); |
8b61709d BP |
4203 | COVERAGE_INC(netdev_get_ifindex); |
4204 | if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) { | |
4205 | VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s", | |
4206 | netdev_name, strerror(errno)); | |
4207 | return -errno; | |
4208 | } | |
4209 | return ifr.ifr_ifindex; | |
4210 | } | |
4211 | ||
4212 | static int | |
4213 | get_ifindex(const struct netdev *netdev_, int *ifindexp) | |
4214 | { | |
149f577a JG |
4215 | struct netdev_dev_linux *netdev_dev = |
4216 | netdev_dev_linux_cast(netdev_get_dev(netdev_)); | |
8b61709d | 4217 | *ifindexp = 0; |
149f577a | 4218 | if (!(netdev_dev->cache_valid & VALID_IFINDEX)) { |
8b61709d BP |
4219 | int ifindex = do_get_ifindex(netdev_get_name(netdev_)); |
4220 | if (ifindex < 0) { | |
4221 | return -ifindex; | |
4222 | } | |
149f577a JG |
4223 | netdev_dev->cache_valid |= VALID_IFINDEX; |
4224 | netdev_dev->ifindex = ifindex; | |
8b61709d | 4225 | } |
149f577a | 4226 | *ifindexp = netdev_dev->ifindex; |
8b61709d BP |
4227 | return 0; |
4228 | } | |
4229 | ||
4230 | static int | |
4231 | get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]) | |
4232 | { | |
4233 | struct ifreq ifr; | |
4234 | int hwaddr_family; | |
4235 | ||
4236 | memset(&ifr, 0, sizeof ifr); | |
71d7c22f | 4237 | ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); |
8b61709d BP |
4238 | COVERAGE_INC(netdev_get_hwaddr); |
4239 | if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) { | |
78857dfb BP |
4240 | /* ENODEV probably means that a vif disappeared asynchronously and |
4241 | * hasn't been removed from the database yet, so reduce the log level | |
4242 | * to INFO for that case. */ | |
4243 | VLOG(errno == ENODEV ? VLL_INFO : VLL_ERR, | |
4244 | "ioctl(SIOCGIFHWADDR) on %s device failed: %s", | |
4245 | netdev_name, strerror(errno)); | |
8b61709d BP |
4246 | return errno; |
4247 | } | |
4248 | hwaddr_family = ifr.ifr_hwaddr.sa_family; | |
4249 | if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) { | |
4250 | VLOG_WARN("%s device has unknown hardware address family %d", | |
4251 | netdev_name, hwaddr_family); | |
4252 | } | |
4253 | memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN); | |
4254 | return 0; | |
4255 | } | |
4256 | ||
4257 | static int | |
4258 | set_etheraddr(const char *netdev_name, int hwaddr_family, | |
4259 | const uint8_t mac[ETH_ADDR_LEN]) | |
4260 | { | |
4261 | struct ifreq ifr; | |
4262 | ||
4263 | memset(&ifr, 0, sizeof ifr); | |
71d7c22f | 4264 | ovs_strzcpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); |
8b61709d BP |
4265 | ifr.ifr_hwaddr.sa_family = hwaddr_family; |
4266 | memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN); | |
4267 | COVERAGE_INC(netdev_set_hwaddr); | |
4268 | if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) { | |
4269 | VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s", | |
4270 | netdev_name, strerror(errno)); | |
4271 | return errno; | |
4272 | } | |
4273 | return 0; | |
4274 | } | |
4275 | ||
4276 | static int | |
0b0544d7 | 4277 | netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *ecmd, |
8b61709d BP |
4278 | int cmd, const char *cmd_name) |
4279 | { | |
4280 | struct ifreq ifr; | |
4281 | ||
4282 | memset(&ifr, 0, sizeof ifr); | |
71d7c22f | 4283 | ovs_strzcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); |
8b61709d BP |
4284 | ifr.ifr_data = (caddr_t) ecmd; |
4285 | ||
4286 | ecmd->cmd = cmd; | |
4287 | COVERAGE_INC(netdev_ethtool); | |
4288 | if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) { | |
4289 | return 0; | |
4290 | } else { | |
4291 | if (errno != EOPNOTSUPP) { | |
4292 | VLOG_WARN_RL(&rl, "ethtool command %s on network device %s " | |
0b0544d7 | 4293 | "failed: %s", cmd_name, name, strerror(errno)); |
8b61709d BP |
4294 | } else { |
4295 | /* The device doesn't support this operation. That's pretty | |
4296 | * common, so there's no point in logging anything. */ | |
4297 | } | |
4298 | return errno; | |
4299 | } | |
4300 | } | |
4301 | ||
e47bd51a JP |
4302 | /* Modifies the 'flag' bit in ethtool's flags field for 'netdev'. If |
4303 | * 'enable' is true, the bit is set. Otherwise, it is cleared. */ | |
4304 | int | |
4305 | netdev_linux_ethtool_set_flag(struct netdev *netdev, uint32_t flag, | |
4306 | const char *flag_name, bool enable) | |
4307 | { | |
4308 | const char *netdev_name = netdev_get_name(netdev); | |
4309 | struct ethtool_value evalue; | |
4310 | uint32_t new_flags; | |
4311 | int error; | |
4312 | ||
4313 | memset(&evalue, 0, sizeof evalue); | |
4314 | error = netdev_linux_do_ethtool(netdev_name, | |
4315 | (struct ethtool_cmd *)&evalue, | |
4316 | ETHTOOL_GFLAGS, "ETHTOOL_GFLAGS"); | |
4317 | if (error) { | |
4318 | return error; | |
4319 | } | |
4320 | ||
4321 | evalue.data = new_flags = (evalue.data & ~flag) | (enable ? flag : 0); | |
4322 | error = netdev_linux_do_ethtool(netdev_name, | |
4323 | (struct ethtool_cmd *)&evalue, | |
4324 | ETHTOOL_SFLAGS, "ETHTOOL_SFLAGS"); | |
4325 | if (error) { | |
4326 | return error; | |
4327 | } | |
4328 | ||
4329 | memset(&evalue, 0, sizeof evalue); | |
4330 | error = netdev_linux_do_ethtool(netdev_name, | |
4331 | (struct ethtool_cmd *)&evalue, | |
4332 | ETHTOOL_GFLAGS, "ETHTOOL_GFLAGS"); | |
4333 | if (error) { | |
4334 | return error; | |
4335 | } | |
4336 | ||
4337 | if (new_flags != evalue.data) { | |
4338 | VLOG_WARN_RL(&rl, "attempt to %s ethtool %s flag on network " | |
4339 | "device %s failed", enable ? "enable" : "disable", | |
4340 | flag_name, netdev_name); | |
4341 | return EOPNOTSUPP; | |
4342 | } | |
4343 | ||
4344 | return 0; | |
4345 | } | |
4346 | ||
8b61709d | 4347 | static int |
149f577a JG |
4348 | netdev_linux_do_ioctl(const char *name, struct ifreq *ifr, int cmd, |
4349 | const char *cmd_name) | |
8b61709d | 4350 | { |
71d7c22f | 4351 | ovs_strzcpy(ifr->ifr_name, name, sizeof ifr->ifr_name); |
8b61709d | 4352 | if (ioctl(af_inet_sock, cmd, ifr) == -1) { |
149f577a JG |
4353 | VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name, |
4354 | strerror(errno)); | |
8b61709d BP |
4355 | return errno; |
4356 | } | |
4357 | return 0; | |
4358 | } | |
f1acd62b BP |
4359 | |
4360 | static int | |
4361 | netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip, | |
4362 | int cmd, const char *cmd_name) | |
4363 | { | |
4364 | struct ifreq ifr; | |
4365 | int error; | |
4366 | ||
4367 | ifr.ifr_addr.sa_family = AF_INET; | |
149f577a | 4368 | error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, cmd, cmd_name); |
f1acd62b BP |
4369 | if (!error) { |
4370 | const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr; | |
4371 | *ip = sin->sin_addr; | |
4372 | } | |
4373 | return error; | |
4374 | } | |
488d734d BP |
4375 | |
4376 | /* Returns an AF_PACKET raw socket or a negative errno value. */ | |
4377 | static int | |
4378 | af_packet_sock(void) | |
4379 | { | |
4380 | static int sock = INT_MIN; | |
4381 | ||
4382 | if (sock == INT_MIN) { | |
4383 | sock = socket(AF_PACKET, SOCK_RAW, 0); | |
4384 | if (sock >= 0) { | |
4385 | set_nonblocking(sock); | |
4386 | } else { | |
4387 | sock = -errno; | |
4388 | VLOG_ERR("failed to create packet socket: %s", strerror(errno)); | |
4389 | } | |
4390 | } | |
4391 | ||
4392 | return sock; | |
4393 | } |