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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
1da177e4 LT |
34 | #include <linux/kernel.h> |
35 | #include <linux/module.h> | |
1da177e4 LT |
36 | #include <linux/types.h> |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/ptrace.h> | |
40 | #include <linux/ioport.h> | |
41 | #include <linux/in.h> | |
169a3e66 | 42 | #include <net/ip.h> |
1da177e4 | 43 | #include <linux/ip.h> |
169a3e66 JV |
44 | #include <linux/tcp.h> |
45 | #include <linux/udp.h> | |
1da177e4 LT |
46 | #include <linux/slab.h> |
47 | #include <linux/string.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/socket.h> | |
51 | #include <linux/ctype.h> | |
52 | #include <linux/inet.h> | |
53 | #include <linux/bitops.h> | |
3d632c3f | 54 | #include <linux/io.h> |
1da177e4 | 55 | #include <asm/dma.h> |
3d632c3f | 56 | #include <linux/uaccess.h> |
1da177e4 LT |
57 | #include <linux/errno.h> |
58 | #include <linux/netdevice.h> | |
59 | #include <linux/inetdevice.h> | |
a816c7c7 | 60 | #include <linux/igmp.h> |
1da177e4 LT |
61 | #include <linux/etherdevice.h> |
62 | #include <linux/skbuff.h> | |
63 | #include <net/sock.h> | |
64 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
65 | #include <linux/smp.h> |
66 | #include <linux/if_ether.h> | |
67 | #include <net/arp.h> | |
68 | #include <linux/mii.h> | |
69 | #include <linux/ethtool.h> | |
70 | #include <linux/if_vlan.h> | |
71 | #include <linux/if_bonding.h> | |
b63bb739 | 72 | #include <linux/jiffies.h> |
e843fa50 | 73 | #include <linux/preempt.h> |
c3ade5ca | 74 | #include <net/route.h> |
457c4cbc | 75 | #include <net/net_namespace.h> |
ec87fd3b | 76 | #include <net/netns/generic.h> |
5ee31c68 | 77 | #include <net/pkt_sched.h> |
278b2083 | 78 | #include <linux/rculist.h> |
32819dc1 | 79 | #include <net/flow_keys.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
1da177e4 LT |
87 | |
88 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 89 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 90 | static int num_peer_notif = 1; |
b98d9c66 | 91 | static int miimon; |
3d632c3f SH |
92 | static int updelay; |
93 | static int downdelay; | |
1da177e4 | 94 | static int use_carrier = 1; |
3d632c3f SH |
95 | static char *mode; |
96 | static char *primary; | |
a549952a | 97 | static char *primary_reselect; |
3d632c3f | 98 | static char *lacp_rate; |
655f8919 | 99 | static int min_links; |
3d632c3f SH |
100 | static char *ad_select; |
101 | static char *xmit_hash_policy; | |
7bdb04ed | 102 | static int arp_interval; |
3d632c3f SH |
103 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
104 | static char *arp_validate; | |
8599b52e | 105 | static char *arp_all_targets; |
3d632c3f | 106 | static char *fail_over_mac; |
b07ea07b | 107 | static int all_slaves_active; |
d2991f75 | 108 | static struct bond_params bonding_defaults; |
c2952c31 | 109 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
73958329 | 110 | static int packets_per_slave = 1; |
3a7129e5 | 111 | static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL; |
1da177e4 LT |
112 | |
113 | module_param(max_bonds, int, 0); | |
114 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
115 | module_param(tx_queues, int, 0); |
116 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 | 117 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
90e62474 AG |
118 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
119 | "failover event (alias of num_unsol_na)"); | |
ad246c99 | 120 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
90e62474 AG |
121 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
122 | "failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
123 | module_param(miimon, int, 0); |
124 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
125 | module_param(updelay, int, 0); | |
126 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
127 | module_param(downdelay, int, 0); | |
2ac47660 MW |
128 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
129 | "in milliseconds"); | |
1da177e4 | 130 | module_param(use_carrier, int, 0); |
2ac47660 MW |
131 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
132 | "0 for off, 1 for on (default)"); | |
1da177e4 | 133 | module_param(mode, charp, 0); |
90e62474 | 134 | MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
2ac47660 MW |
135 | "1 for active-backup, 2 for balance-xor, " |
136 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
137 | "6 for balance-alb"); | |
1da177e4 LT |
138 | module_param(primary, charp, 0); |
139 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
140 | module_param(primary_reselect, charp, 0); |
141 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
142 | "once it comes up; " | |
143 | "0 for always (default), " | |
144 | "1 for only if speed of primary is " | |
145 | "better, " | |
146 | "2 for only on active slave " | |
147 | "failure"); | |
1da177e4 | 148 | module_param(lacp_rate, charp, 0); |
90e62474 AG |
149 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
150 | "0 for slow, 1 for fast"); | |
fd989c83 | 151 | module_param(ad_select, charp, 0); |
90e62474 AG |
152 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; " |
153 | "0 for stable (default), 1 for bandwidth, " | |
154 | "2 for count"); | |
655f8919 | 155 | module_param(min_links, int, 0); |
156 | MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); | |
157 | ||
169a3e66 | 158 | module_param(xmit_hash_policy, charp, 0); |
90e62474 AG |
159 | MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; " |
160 | "0 for layer 2 (default), 1 for layer 3+4, " | |
32819dc1 NA |
161 | "2 for layer 2+3, 3 for encap layer 2+3, " |
162 | "4 for encap layer 3+4"); | |
1da177e4 LT |
163 | module_param(arp_interval, int, 0); |
164 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
165 | module_param_array(arp_ip_target, charp, NULL, 0); | |
166 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 | 167 | module_param(arp_validate, charp, 0); |
90e62474 AG |
168 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
169 | "0 for none (default), 1 for active, " | |
170 | "2 for backup, 3 for all"); | |
8599b52e VF |
171 | module_param(arp_all_targets, charp, 0); |
172 | MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all"); | |
3915c1e8 | 173 | module_param(fail_over_mac, charp, 0); |
90e62474 AG |
174 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
175 | "the same MAC; 0 for none (default), " | |
176 | "1 for active, 2 for follow"); | |
ebd8e497 | 177 | module_param(all_slaves_active, int, 0); |
37b7021d | 178 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface " |
90e62474 | 179 | "by setting active flag for all slaves; " |
ebd8e497 | 180 | "0 for never (default), 1 for always."); |
c2952c31 | 181 | module_param(resend_igmp, int, 0); |
90e62474 AG |
182 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
183 | "link failure"); | |
73958329 NA |
184 | module_param(packets_per_slave, int, 0); |
185 | MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr " | |
186 | "mode; 0 for a random slave, 1 packet per " | |
187 | "slave (default), >1 packets per slave."); | |
3a7129e5 | 188 | module_param(lp_interval, uint, 0); |
189 | MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where " | |
190 | "the bonding driver sends learning packets to " | |
191 | "each slaves peer switch. The default is 1."); | |
1da177e4 LT |
192 | |
193 | /*----------------------------- Global variables ----------------------------*/ | |
194 | ||
e843fa50 | 195 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 196 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
197 | #endif |
198 | ||
f99189b1 | 199 | int bond_net_id __read_mostly; |
1da177e4 | 200 | |
3d632c3f SH |
201 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
202 | static int arp_ip_count; | |
1da177e4 | 203 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
204 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
205 | static int lacp_fast; | |
1da177e4 | 206 | |
1da177e4 LT |
207 | /*-------------------------- Forward declarations ---------------------------*/ |
208 | ||
181470fc | 209 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 210 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
211 | |
212 | /*---------------------------- General routines -----------------------------*/ | |
213 | ||
bd33acc3 | 214 | const char *bond_mode_name(int mode) |
1da177e4 | 215 | { |
77afc92b HE |
216 | static const char *names[] = { |
217 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
218 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
219 | [BOND_MODE_XOR] = "load balancing (xor)", | |
220 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 221 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
222 | [BOND_MODE_TLB] = "transmit load balancing", |
223 | [BOND_MODE_ALB] = "adaptive load balancing", | |
224 | }; | |
225 | ||
f5280948 | 226 | if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB) |
1da177e4 | 227 | return "unknown"; |
77afc92b HE |
228 | |
229 | return names[mode]; | |
1da177e4 LT |
230 | } |
231 | ||
232 | /*---------------------------------- VLAN -----------------------------------*/ | |
233 | ||
1da177e4 LT |
234 | /** |
235 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 236 | * |
1da177e4 LT |
237 | * @bond: bond device that got this skb for tx. |
238 | * @skb: hw accel VLAN tagged skb to transmit | |
239 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 240 | */ |
d316dedd | 241 | void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
3d632c3f | 242 | struct net_device *slave_dev) |
1da177e4 | 243 | { |
8387451e | 244 | skb->dev = slave_dev; |
374eeb5a | 245 | |
5ee31c68 | 246 | BUILD_BUG_ON(sizeof(skb->queue_mapping) != |
df4ab5b3 JP |
247 | sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); |
248 | skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping; | |
374eeb5a | 249 | |
e15c3c22 | 250 | if (unlikely(netpoll_tx_running(bond->dev))) |
8a8efa22 | 251 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 252 | else |
f6dc31a8 | 253 | dev_queue_xmit(skb); |
1da177e4 LT |
254 | } |
255 | ||
256 | /* | |
cc0e4070 JP |
257 | * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, |
258 | * We don't protect the slave list iteration with a lock because: | |
1da177e4 LT |
259 | * a. This operation is performed in IOCTL context, |
260 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
261 | * c. Holding a lock with BH disabled while directly calling a base driver | |
262 | * entry point is generally a BAD idea. | |
3d632c3f | 263 | * |
1da177e4 LT |
264 | * The design of synchronization/protection for this operation in the 8021q |
265 | * module is good for one or more VLAN devices over a single physical device | |
266 | * and cannot be extended for a teaming solution like bonding, so there is a | |
267 | * potential race condition here where a net device from the vlan group might | |
268 | * be referenced (either by a base driver or the 8021q code) while it is being | |
269 | * removed from the system. However, it turns out we're not making matters | |
270 | * worse, and if it works for regular VLAN usage it will work here too. | |
271 | */ | |
272 | ||
1da177e4 LT |
273 | /** |
274 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
275 | * @bond_dev: bonding net device that got called | |
276 | * @vid: vlan id being added | |
277 | */ | |
80d5c368 PM |
278 | static int bond_vlan_rx_add_vid(struct net_device *bond_dev, |
279 | __be16 proto, u16 vid) | |
1da177e4 | 280 | { |
454d7c9b | 281 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 282 | struct slave *slave, *rollback_slave; |
9caff1e7 | 283 | struct list_head *iter; |
dec1e90e | 284 | int res; |
1da177e4 | 285 | |
9caff1e7 | 286 | bond_for_each_slave(bond, slave, iter) { |
80d5c368 | 287 | res = vlan_vid_add(slave->dev, proto, vid); |
87002b03 JP |
288 | if (res) |
289 | goto unwind; | |
1da177e4 LT |
290 | } |
291 | ||
8e586137 | 292 | return 0; |
87002b03 JP |
293 | |
294 | unwind: | |
81f23b13 | 295 | /* unwind to the slave that failed */ |
9caff1e7 | 296 | bond_for_each_slave(bond, rollback_slave, iter) { |
81f23b13 VF |
297 | if (rollback_slave == slave) |
298 | break; | |
299 | ||
300 | vlan_vid_del(rollback_slave->dev, proto, vid); | |
301 | } | |
87002b03 JP |
302 | |
303 | return res; | |
1da177e4 LT |
304 | } |
305 | ||
306 | /** | |
307 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
308 | * @bond_dev: bonding net device that got called | |
309 | * @vid: vlan id being removed | |
310 | */ | |
80d5c368 PM |
311 | static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, |
312 | __be16 proto, u16 vid) | |
1da177e4 | 313 | { |
454d7c9b | 314 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 315 | struct list_head *iter; |
1da177e4 | 316 | struct slave *slave; |
1da177e4 | 317 | |
9caff1e7 | 318 | bond_for_each_slave(bond, slave, iter) |
80d5c368 | 319 | vlan_vid_del(slave->dev, proto, vid); |
1da177e4 | 320 | |
e868b0c9 VF |
321 | if (bond_is_lb(bond)) |
322 | bond_alb_clear_vlan(bond, vid); | |
8e586137 JP |
323 | |
324 | return 0; | |
1da177e4 LT |
325 | } |
326 | ||
1da177e4 LT |
327 | /*------------------------------- Link status -------------------------------*/ |
328 | ||
ff59c456 JV |
329 | /* |
330 | * Set the carrier state for the master according to the state of its | |
331 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
332 | * do special 802.3ad magic. | |
333 | * | |
334 | * Returns zero if carrier state does not change, nonzero if it does. | |
335 | */ | |
336 | static int bond_set_carrier(struct bonding *bond) | |
337 | { | |
9caff1e7 | 338 | struct list_head *iter; |
ff59c456 | 339 | struct slave *slave; |
ff59c456 | 340 | |
0965a1f3 | 341 | if (!bond_has_slaves(bond)) |
ff59c456 JV |
342 | goto down; |
343 | ||
01844098 | 344 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
ff59c456 JV |
345 | return bond_3ad_set_carrier(bond); |
346 | ||
9caff1e7 | 347 | bond_for_each_slave(bond, slave, iter) { |
ff59c456 JV |
348 | if (slave->link == BOND_LINK_UP) { |
349 | if (!netif_carrier_ok(bond->dev)) { | |
350 | netif_carrier_on(bond->dev); | |
351 | return 1; | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | } | |
356 | ||
357 | down: | |
358 | if (netif_carrier_ok(bond->dev)) { | |
359 | netif_carrier_off(bond->dev); | |
360 | return 1; | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
1da177e4 LT |
365 | /* |
366 | * Get link speed and duplex from the slave's base driver | |
367 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 368 | * values are invalid, set speed and duplex to -1, |
13b95fb7 | 369 | * and return. |
1da177e4 | 370 | */ |
13b95fb7 | 371 | static void bond_update_speed_duplex(struct slave *slave) |
1da177e4 LT |
372 | { |
373 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 374 | struct ethtool_cmd ecmd; |
5d30530e | 375 | u32 slave_speed; |
61a44b9c | 376 | int res; |
1da177e4 | 377 | |
589665f5 DC |
378 | slave->speed = SPEED_UNKNOWN; |
379 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 380 | |
4bc71cb9 | 381 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 382 | if (res < 0) |
13b95fb7 | 383 | return; |
1da177e4 | 384 | |
4bc71cb9 | 385 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 386 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
13b95fb7 | 387 | return; |
1da177e4 | 388 | |
4bc71cb9 | 389 | switch (ecmd.duplex) { |
1da177e4 LT |
390 | case DUPLEX_FULL: |
391 | case DUPLEX_HALF: | |
392 | break; | |
393 | default: | |
13b95fb7 | 394 | return; |
1da177e4 LT |
395 | } |
396 | ||
5d30530e | 397 | slave->speed = slave_speed; |
4bc71cb9 | 398 | slave->duplex = ecmd.duplex; |
1da177e4 | 399 | |
13b95fb7 | 400 | return; |
1da177e4 LT |
401 | } |
402 | ||
07699f9a | 403 | const char *bond_slave_link_status(s8 link) |
404 | { | |
405 | switch (link) { | |
406 | case BOND_LINK_UP: | |
407 | return "up"; | |
408 | case BOND_LINK_FAIL: | |
409 | return "going down"; | |
410 | case BOND_LINK_DOWN: | |
411 | return "down"; | |
412 | case BOND_LINK_BACK: | |
413 | return "going back"; | |
414 | default: | |
415 | return "unknown"; | |
416 | } | |
417 | } | |
418 | ||
1da177e4 LT |
419 | /* |
420 | * if <dev> supports MII link status reporting, check its link status. | |
421 | * | |
422 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 423 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
424 | * |
425 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
426 | * can't tell and just pretend it is), or 0, meaning that the link is | |
427 | * down. | |
428 | * | |
429 | * If reporting is non-zero, instead of faking link up, return -1 if | |
430 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
431 | * support them). If use_carrier is set, return whatever it says. | |
432 | * It'd be nice if there was a good way to tell if a driver supports | |
433 | * netif_carrier, but there really isn't. | |
434 | */ | |
3d632c3f SH |
435 | static int bond_check_dev_link(struct bonding *bond, |
436 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 437 | { |
eb7cc59a | 438 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 439 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
440 | struct ifreq ifr; |
441 | struct mii_ioctl_data *mii; | |
1da177e4 | 442 | |
6c988853 PG |
443 | if (!reporting && !netif_running(slave_dev)) |
444 | return 0; | |
445 | ||
eb7cc59a | 446 | if (bond->params.use_carrier) |
1da177e4 | 447 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 448 | |
29112f4e | 449 | /* Try to get link status using Ethtool first. */ |
c772dde3 BH |
450 | if (slave_dev->ethtool_ops->get_link) |
451 | return slave_dev->ethtool_ops->get_link(slave_dev) ? | |
452 | BMSR_LSTATUS : 0; | |
29112f4e | 453 | |
3d632c3f | 454 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 455 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
456 | if (ioctl) { |
457 | /* TODO: set pointer to correct ioctl on a per team member */ | |
458 | /* bases to make this more efficient. that is, once */ | |
459 | /* we determine the correct ioctl, we will always */ | |
460 | /* call it and not the others for that team */ | |
461 | /* member. */ | |
462 | ||
463 | /* | |
464 | * We cannot assume that SIOCGMIIPHY will also read a | |
465 | * register; not all network drivers (e.g., e100) | |
466 | * support that. | |
467 | */ | |
468 | ||
469 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
470 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
471 | mii = if_mii(&ifr); | |
472 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
473 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
474 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
475 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
476 | } |
477 | } | |
478 | ||
1da177e4 LT |
479 | /* |
480 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 481 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
482 | * cannot report link status). If not reporting, pretend |
483 | * we're ok. | |
484 | */ | |
3d632c3f | 485 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
486 | } |
487 | ||
488 | /*----------------------------- Multicast list ------------------------------*/ | |
489 | ||
1da177e4 LT |
490 | /* |
491 | * Push the promiscuity flag down to appropriate slaves | |
492 | */ | |
7e1a1ac1 | 493 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 494 | { |
9caff1e7 | 495 | struct list_head *iter; |
7e1a1ac1 | 496 | int err = 0; |
9caff1e7 | 497 | |
ec0865a9 | 498 | if (bond_uses_primary(bond)) { |
14056e79 | 499 | struct slave *curr_active = rtnl_dereference(bond->curr_active_slave); |
4740d638 | 500 | |
4740d638 ED |
501 | if (curr_active) |
502 | err = dev_set_promiscuity(curr_active->dev, inc); | |
1da177e4 LT |
503 | } else { |
504 | struct slave *slave; | |
dec1e90e | 505 | |
9caff1e7 | 506 | bond_for_each_slave(bond, slave, iter) { |
7e1a1ac1 WC |
507 | err = dev_set_promiscuity(slave->dev, inc); |
508 | if (err) | |
509 | return err; | |
1da177e4 LT |
510 | } |
511 | } | |
7e1a1ac1 | 512 | return err; |
1da177e4 LT |
513 | } |
514 | ||
515 | /* | |
516 | * Push the allmulti flag down to all slaves | |
517 | */ | |
7e1a1ac1 | 518 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 519 | { |
9caff1e7 | 520 | struct list_head *iter; |
7e1a1ac1 | 521 | int err = 0; |
9caff1e7 | 522 | |
ec0865a9 | 523 | if (bond_uses_primary(bond)) { |
14056e79 | 524 | struct slave *curr_active = rtnl_dereference(bond->curr_active_slave); |
4740d638 | 525 | |
4740d638 ED |
526 | if (curr_active) |
527 | err = dev_set_allmulti(curr_active->dev, inc); | |
1da177e4 LT |
528 | } else { |
529 | struct slave *slave; | |
dec1e90e | 530 | |
9caff1e7 | 531 | bond_for_each_slave(bond, slave, iter) { |
7e1a1ac1 WC |
532 | err = dev_set_allmulti(slave->dev, inc); |
533 | if (err) | |
534 | return err; | |
1da177e4 LT |
535 | } |
536 | } | |
7e1a1ac1 | 537 | return err; |
1da177e4 LT |
538 | } |
539 | ||
5a37e8ca FL |
540 | /* |
541 | * Retrieve the list of registered multicast addresses for the bonding | |
542 | * device and retransmit an IGMP JOIN request to the current active | |
543 | * slave. | |
544 | */ | |
f2369109 | 545 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca | 546 | { |
f2369109 | 547 | struct bonding *bond = container_of(work, struct bonding, |
548 | mcast_work.work); | |
549 | ||
4aa5dee4 | 550 | if (!rtnl_trylock()) { |
4beac029 | 551 | queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
4aa5dee4 | 552 | return; |
5a37e8ca | 553 | } |
4aa5dee4 | 554 | call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev); |
5a37e8ca | 555 | |
4f5474e7 NA |
556 | if (bond->igmp_retrans > 1) { |
557 | bond->igmp_retrans--; | |
c2952c31 | 558 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
4f5474e7 | 559 | } |
f2369109 | 560 | rtnl_unlock(); |
5a37e8ca FL |
561 | } |
562 | ||
303d1cbf | 563 | /* Flush bond's hardware addresses from slave |
1da177e4 | 564 | */ |
303d1cbf | 565 | static void bond_hw_addr_flush(struct net_device *bond_dev, |
3d632c3f | 566 | struct net_device *slave_dev) |
1da177e4 | 567 | { |
454d7c9b | 568 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 569 | |
303d1cbf JV |
570 | dev_uc_unsync(slave_dev, bond_dev); |
571 | dev_mc_unsync(slave_dev, bond_dev); | |
1da177e4 | 572 | |
01844098 | 573 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
1da177e4 LT |
574 | /* del lacpdu mc addr from mc list */ |
575 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
576 | ||
22bedad3 | 577 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
578 | } |
579 | } | |
580 | ||
581 | /*--------------------------- Active slave change ---------------------------*/ | |
582 | ||
303d1cbf | 583 | /* Update the hardware address list and promisc/allmulti for the new and |
ec0865a9 VF |
584 | * old active slaves (if any). Modes that are not using primary keep all |
585 | * slaves up date at all times; only the modes that use primary need to call | |
303d1cbf | 586 | * this function to swap these settings during a failover. |
1da177e4 | 587 | */ |
303d1cbf JV |
588 | static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active, |
589 | struct slave *old_active) | |
1da177e4 | 590 | { |
7864a1ad VF |
591 | ASSERT_RTNL(); |
592 | ||
1da177e4 | 593 | if (old_active) { |
3d632c3f | 594 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 595 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 596 | |
3d632c3f | 597 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 598 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 599 | |
303d1cbf | 600 | bond_hw_addr_flush(bond->dev, old_active->dev); |
1da177e4 LT |
601 | } |
602 | ||
603 | if (new_active) { | |
7e1a1ac1 | 604 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 605 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 606 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 607 | |
3d632c3f | 608 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 609 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 610 | |
d632ce98 | 611 | netif_addr_lock_bh(bond->dev); |
303d1cbf JV |
612 | dev_uc_sync(new_active->dev, bond->dev); |
613 | dev_mc_sync(new_active->dev, bond->dev); | |
d632ce98 | 614 | netif_addr_unlock_bh(bond->dev); |
1da177e4 LT |
615 | } |
616 | } | |
617 | ||
ae0d6750 | 618 | /** |
619 | * bond_set_dev_addr - clone slave's address to bond | |
620 | * @bond_dev: bond net device | |
621 | * @slave_dev: slave net device | |
622 | * | |
623 | * Should be called with RTNL held. | |
624 | */ | |
625 | static void bond_set_dev_addr(struct net_device *bond_dev, | |
626 | struct net_device *slave_dev) | |
627 | { | |
76444f50 VF |
628 | netdev_dbg(bond_dev, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n", |
629 | bond_dev, slave_dev, slave_dev->addr_len); | |
ae0d6750 | 630 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
631 | bond_dev->addr_assign_type = NET_ADDR_STOLEN; | |
632 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev); | |
633 | } | |
634 | ||
3915c1e8 JV |
635 | /* |
636 | * bond_do_fail_over_mac | |
637 | * | |
638 | * Perform special MAC address swapping for fail_over_mac settings | |
639 | * | |
b2e7aceb | 640 | * Called with RTNL, curr_slave_lock for write_bh. |
3915c1e8 JV |
641 | */ |
642 | static void bond_do_fail_over_mac(struct bonding *bond, | |
643 | struct slave *new_active, | |
644 | struct slave *old_active) | |
1f78d9f9 | 645 | __releases(&bond->curr_slave_lock) |
1f78d9f9 | 646 | __acquires(&bond->curr_slave_lock) |
3915c1e8 JV |
647 | { |
648 | u8 tmp_mac[ETH_ALEN]; | |
649 | struct sockaddr saddr; | |
650 | int rv; | |
651 | ||
652 | switch (bond->params.fail_over_mac) { | |
653 | case BOND_FOM_ACTIVE: | |
7d26bb10 | 654 | if (new_active) { |
7d26bb10 | 655 | write_unlock_bh(&bond->curr_slave_lock); |
ae0d6750 | 656 | bond_set_dev_addr(bond->dev, new_active->dev); |
7d26bb10 WP |
657 | write_lock_bh(&bond->curr_slave_lock); |
658 | } | |
3915c1e8 JV |
659 | break; |
660 | case BOND_FOM_FOLLOW: | |
661 | /* | |
662 | * if new_active && old_active, swap them | |
663 | * if just old_active, do nothing (going to no active slave) | |
664 | * if just new_active, set new_active to bond's MAC | |
665 | */ | |
666 | if (!new_active) | |
667 | return; | |
668 | ||
669 | write_unlock_bh(&bond->curr_slave_lock); | |
3915c1e8 JV |
670 | |
671 | if (old_active) { | |
ada0f863 | 672 | ether_addr_copy(tmp_mac, new_active->dev->dev_addr); |
2a7c183b JP |
673 | ether_addr_copy(saddr.sa_data, |
674 | old_active->dev->dev_addr); | |
3915c1e8 JV |
675 | saddr.sa_family = new_active->dev->type; |
676 | } else { | |
ada0f863 | 677 | ether_addr_copy(saddr.sa_data, bond->dev->dev_addr); |
3915c1e8 JV |
678 | saddr.sa_family = bond->dev->type; |
679 | } | |
680 | ||
681 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
682 | if (rv) { | |
76444f50 VF |
683 | netdev_err(bond->dev, "Error %d setting MAC of slave %s\n", |
684 | -rv, new_active->dev->name); | |
3915c1e8 JV |
685 | goto out; |
686 | } | |
687 | ||
688 | if (!old_active) | |
689 | goto out; | |
690 | ||
ada0f863 | 691 | ether_addr_copy(saddr.sa_data, tmp_mac); |
3915c1e8 JV |
692 | saddr.sa_family = old_active->dev->type; |
693 | ||
694 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
695 | if (rv) | |
76444f50 VF |
696 | netdev_err(bond->dev, "Error %d setting MAC of slave %s\n", |
697 | -rv, new_active->dev->name); | |
3915c1e8 | 698 | out: |
3915c1e8 JV |
699 | write_lock_bh(&bond->curr_slave_lock); |
700 | break; | |
701 | default: | |
76444f50 VF |
702 | netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n", |
703 | bond->params.fail_over_mac); | |
3915c1e8 JV |
704 | break; |
705 | } | |
706 | ||
707 | } | |
708 | ||
a549952a JP |
709 | static bool bond_should_change_active(struct bonding *bond) |
710 | { | |
711 | struct slave *prim = bond->primary_slave; | |
4740d638 | 712 | struct slave *curr = bond_deref_active_protected(bond); |
a549952a JP |
713 | |
714 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
715 | return true; | |
716 | if (bond->force_primary) { | |
717 | bond->force_primary = false; | |
718 | return true; | |
719 | } | |
720 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
721 | (prim->speed < curr->speed || | |
722 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
723 | return false; | |
724 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
725 | return false; | |
726 | return true; | |
727 | } | |
3915c1e8 | 728 | |
1da177e4 LT |
729 | /** |
730 | * find_best_interface - select the best available slave to be the active one | |
731 | * @bond: our bonding struct | |
1da177e4 LT |
732 | */ |
733 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
734 | { | |
77140d29 VF |
735 | struct slave *slave, *bestslave = NULL; |
736 | struct list_head *iter; | |
1da177e4 | 737 | int mintime = bond->params.updelay; |
1da177e4 | 738 | |
77140d29 VF |
739 | if (bond->primary_slave && bond->primary_slave->link == BOND_LINK_UP && |
740 | bond_should_change_active(bond)) | |
741 | return bond->primary_slave; | |
1da177e4 | 742 | |
77140d29 VF |
743 | bond_for_each_slave(bond, slave, iter) { |
744 | if (slave->link == BOND_LINK_UP) | |
745 | return slave; | |
b6adc610 | 746 | if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) && |
77140d29 VF |
747 | slave->delay < mintime) { |
748 | mintime = slave->delay; | |
749 | bestslave = slave; | |
1da177e4 LT |
750 | } |
751 | } | |
752 | ||
753 | return bestslave; | |
754 | } | |
755 | ||
ad246c99 BH |
756 | static bool bond_should_notify_peers(struct bonding *bond) |
757 | { | |
4cb4f97b | 758 | struct slave *slave; |
759 | ||
760 | rcu_read_lock(); | |
761 | slave = rcu_dereference(bond->curr_active_slave); | |
762 | rcu_read_unlock(); | |
ad246c99 | 763 | |
76444f50 VF |
764 | netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n", |
765 | slave ? slave->dev->name : "NULL"); | |
ad246c99 BH |
766 | |
767 | if (!slave || !bond->send_peer_notif || | |
768 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
769 | return false; | |
770 | ||
ad246c99 BH |
771 | return true; |
772 | } | |
773 | ||
1da177e4 LT |
774 | /** |
775 | * change_active_interface - change the active slave into the specified one | |
776 | * @bond: our bonding struct | |
777 | * @new: the new slave to make the active one | |
778 | * | |
779 | * Set the new slave to the bond's settings and unset them on the old | |
780 | * curr_active_slave. | |
781 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
782 | * | |
783 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
784 | * because it is apparently the best available slave we have, even though its | |
785 | * updelay hasn't timed out yet. | |
786 | * | |
b2e7aceb | 787 | * If new_active is not NULL, caller must hold curr_slave_lock for write_bh. |
1da177e4 | 788 | */ |
a77b5325 | 789 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 | 790 | { |
4740d638 ED |
791 | struct slave *old_active; |
792 | ||
793 | old_active = rcu_dereference_protected(bond->curr_active_slave, | |
794 | !new_active || | |
795 | lockdep_is_held(&bond->curr_slave_lock)); | |
1da177e4 | 796 | |
3d632c3f | 797 | if (old_active == new_active) |
1da177e4 | 798 | return; |
1da177e4 LT |
799 | |
800 | if (new_active) { | |
8e603460 | 801 | new_active->last_link_up = jiffies; |
b2220cad | 802 | |
1da177e4 | 803 | if (new_active->link == BOND_LINK_BACK) { |
ec0865a9 | 804 | if (bond_uses_primary(bond)) { |
76444f50 VF |
805 | netdev_info(bond->dev, "making interface %s the new active one %d ms earlier\n", |
806 | new_active->dev->name, | |
807 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
808 | } |
809 | ||
810 | new_active->delay = 0; | |
811 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 812 | |
01844098 | 813 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
1da177e4 | 814 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 815 | |
58402054 | 816 | if (bond_is_lb(bond)) |
1da177e4 | 817 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 | 818 | } else { |
ec0865a9 | 819 | if (bond_uses_primary(bond)) { |
76444f50 VF |
820 | netdev_info(bond->dev, "making interface %s the new active one\n", |
821 | new_active->dev->name); | |
1da177e4 LT |
822 | } |
823 | } | |
824 | } | |
825 | ||
ec0865a9 | 826 | if (bond_uses_primary(bond)) |
303d1cbf | 827 | bond_hw_addr_swap(bond, new_active, old_active); |
1da177e4 | 828 | |
58402054 | 829 | if (bond_is_lb(bond)) { |
1da177e4 | 830 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 | 831 | if (old_active) |
5e5b0665 | 832 | bond_set_slave_inactive_flags(old_active, |
833 | BOND_SLAVE_NOTIFY_NOW); | |
8f903c70 | 834 | if (new_active) |
5e5b0665 | 835 | bond_set_slave_active_flags(new_active, |
836 | BOND_SLAVE_NOTIFY_NOW); | |
1da177e4 | 837 | } else { |
278b2083 | 838 | rcu_assign_pointer(bond->curr_active_slave, new_active); |
1da177e4 | 839 | } |
c3ade5ca | 840 | |
01844098 | 841 | if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) { |
3d632c3f | 842 | if (old_active) |
5e5b0665 | 843 | bond_set_slave_inactive_flags(old_active, |
844 | BOND_SLAVE_NOTIFY_NOW); | |
c3ade5ca JV |
845 | |
846 | if (new_active) { | |
ad246c99 BH |
847 | bool should_notify_peers = false; |
848 | ||
5e5b0665 | 849 | bond_set_slave_active_flags(new_active, |
850 | BOND_SLAVE_NOTIFY_NOW); | |
2ab82852 | 851 | |
709f8a45 OG |
852 | if (bond->params.fail_over_mac) |
853 | bond_do_fail_over_mac(bond, new_active, | |
854 | old_active); | |
3915c1e8 | 855 | |
ad246c99 BH |
856 | if (netif_running(bond->dev)) { |
857 | bond->send_peer_notif = | |
858 | bond->params.num_peer_notif; | |
859 | should_notify_peers = | |
860 | bond_should_notify_peers(bond); | |
861 | } | |
862 | ||
01f3109d | 863 | write_unlock_bh(&bond->curr_slave_lock); |
01f3109d | 864 | |
b7bc2a5b | 865 | call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev); |
ad246c99 | 866 | if (should_notify_peers) |
b7bc2a5b AW |
867 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, |
868 | bond->dev); | |
01f3109d | 869 | |
01f3109d | 870 | write_lock_bh(&bond->curr_slave_lock); |
7893b249 | 871 | } |
c3ade5ca | 872 | } |
a2fd940f | 873 | |
5a37e8ca | 874 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
875 | * all were sent on curr_active_slave. |
876 | * resend only if bond is brought up with the affected | |
877 | * bonding modes and the retransmission is enabled */ | |
878 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
ec0865a9 | 879 | ((bond_uses_primary(bond) && new_active) || |
01844098 | 880 | BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) { |
c2952c31 | 881 | bond->igmp_retrans = bond->params.resend_igmp; |
4beac029 | 882 | queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
a2fd940f | 883 | } |
1da177e4 LT |
884 | } |
885 | ||
886 | /** | |
887 | * bond_select_active_slave - select a new active slave, if needed | |
888 | * @bond: our bonding struct | |
889 | * | |
3d632c3f | 890 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
891 | * - The old curr_active_slave has been released or lost its link. |
892 | * - The primary_slave has got its link back. | |
893 | * - A slave has got its link back and there's no old curr_active_slave. | |
894 | * | |
b2e7aceb | 895 | * Caller must hold curr_slave_lock for write_bh. |
1da177e4 | 896 | */ |
a77b5325 | 897 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
898 | { |
899 | struct slave *best_slave; | |
ff59c456 | 900 | int rv; |
1da177e4 LT |
901 | |
902 | best_slave = bond_find_best_slave(bond); | |
4740d638 | 903 | if (best_slave != bond_deref_active_protected(bond)) { |
1da177e4 | 904 | bond_change_active_slave(bond, best_slave); |
ff59c456 JV |
905 | rv = bond_set_carrier(bond); |
906 | if (!rv) | |
907 | return; | |
908 | ||
909 | if (netif_carrier_ok(bond->dev)) { | |
76444f50 | 910 | netdev_info(bond->dev, "first active interface up!\n"); |
ff59c456 | 911 | } else { |
76444f50 | 912 | netdev_info(bond->dev, "now running without any active interface!\n"); |
ff59c456 | 913 | } |
1da177e4 LT |
914 | } |
915 | } | |
916 | ||
f6dc31a8 | 917 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 918 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 919 | { |
8a8efa22 AW |
920 | struct netpoll *np; |
921 | int err = 0; | |
f6dc31a8 | 922 | |
a8779ec1 | 923 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
8a8efa22 AW |
924 | err = -ENOMEM; |
925 | if (!np) | |
926 | goto out; | |
927 | ||
a8779ec1 | 928 | err = __netpoll_setup(np, slave->dev); |
8a8efa22 AW |
929 | if (err) { |
930 | kfree(np); | |
931 | goto out; | |
f6dc31a8 | 932 | } |
8a8efa22 AW |
933 | slave->np = np; |
934 | out: | |
935 | return err; | |
936 | } | |
937 | static inline void slave_disable_netpoll(struct slave *slave) | |
938 | { | |
939 | struct netpoll *np = slave->np; | |
940 | ||
941 | if (!np) | |
942 | return; | |
943 | ||
944 | slave->np = NULL; | |
2cde6acd | 945 | __netpoll_free_async(np); |
8a8efa22 | 946 | } |
f6dc31a8 WC |
947 | |
948 | static void bond_poll_controller(struct net_device *bond_dev) | |
949 | { | |
8a8efa22 AW |
950 | } |
951 | ||
c4cdef9b | 952 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
8a8efa22 | 953 | { |
c4cdef9b | 954 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 955 | struct list_head *iter; |
c2355e1a | 956 | struct slave *slave; |
c2355e1a | 957 | |
9caff1e7 | 958 | bond_for_each_slave(bond, slave, iter) |
b6adc610 | 959 | if (bond_slave_is_up(slave)) |
8a8efa22 | 960 | slave_disable_netpoll(slave); |
f6dc31a8 | 961 | } |
8a8efa22 | 962 | |
a8779ec1 | 963 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) |
8a8efa22 AW |
964 | { |
965 | struct bonding *bond = netdev_priv(dev); | |
9caff1e7 | 966 | struct list_head *iter; |
f6dc31a8 | 967 | struct slave *slave; |
dec1e90e | 968 | int err = 0; |
f6dc31a8 | 969 | |
9caff1e7 | 970 | bond_for_each_slave(bond, slave, iter) { |
8a8efa22 AW |
971 | err = slave_enable_netpoll(slave); |
972 | if (err) { | |
c4cdef9b | 973 | bond_netpoll_cleanup(dev); |
8a8efa22 | 974 | break; |
f6dc31a8 WC |
975 | } |
976 | } | |
8a8efa22 | 977 | return err; |
f6dc31a8 | 978 | } |
8a8efa22 AW |
979 | #else |
980 | static inline int slave_enable_netpoll(struct slave *slave) | |
981 | { | |
982 | return 0; | |
983 | } | |
984 | static inline void slave_disable_netpoll(struct slave *slave) | |
985 | { | |
986 | } | |
f6dc31a8 WC |
987 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
988 | { | |
989 | } | |
f6dc31a8 WC |
990 | #endif |
991 | ||
1da177e4 LT |
992 | /*---------------------------------- IOCTL ----------------------------------*/ |
993 | ||
c8f44aff | 994 | static netdev_features_t bond_fix_features(struct net_device *dev, |
9b7b165a | 995 | netdev_features_t features) |
8531c5ff | 996 | { |
b2a103e6 | 997 | struct bonding *bond = netdev_priv(dev); |
9caff1e7 | 998 | struct list_head *iter; |
c8f44aff | 999 | netdev_features_t mask; |
9b7b165a | 1000 | struct slave *slave; |
b63365a2 | 1001 | |
b2a103e6 | 1002 | mask = features; |
b63365a2 | 1003 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1004 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1005 | |
9caff1e7 | 1006 | bond_for_each_slave(bond, slave, iter) { |
b63365a2 HX |
1007 | features = netdev_increment_features(features, |
1008 | slave->dev->features, | |
b2a103e6 MM |
1009 | mask); |
1010 | } | |
b0ce3508 | 1011 | features = netdev_add_tso_features(features, mask); |
b2a103e6 | 1012 | |
b2a103e6 MM |
1013 | return features; |
1014 | } | |
1015 | ||
62f2a3a4 MM |
1016 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1017 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1018 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 | 1019 | |
5a7baa78 OG |
1020 | #define BOND_ENC_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | NETIF_F_RXCSUM |\ |
1021 | NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL) | |
1022 | ||
b2a103e6 MM |
1023 | static void bond_compute_features(struct bonding *bond) |
1024 | { | |
c4826861 | 1025 | unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE; |
c8f44aff | 1026 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
5a7baa78 | 1027 | netdev_features_t enc_features = BOND_ENC_FEATURES; |
9caff1e7 VF |
1028 | struct net_device *bond_dev = bond->dev; |
1029 | struct list_head *iter; | |
1030 | struct slave *slave; | |
b2a103e6 | 1031 | unsigned short max_hard_header_len = ETH_HLEN; |
0e376bd0 SB |
1032 | unsigned int gso_max_size = GSO_MAX_SIZE; |
1033 | u16 gso_max_segs = GSO_MAX_SEGS; | |
b2a103e6 | 1034 | |
0965a1f3 | 1035 | if (!bond_has_slaves(bond)) |
b2a103e6 | 1036 | goto done; |
a9b3ace4 | 1037 | vlan_features &= NETIF_F_ALL_FOR_ALL; |
b2a103e6 | 1038 | |
9caff1e7 | 1039 | bond_for_each_slave(bond, slave, iter) { |
278339a4 | 1040 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1041 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1042 | ||
5a7baa78 OG |
1043 | enc_features = netdev_increment_features(enc_features, |
1044 | slave->dev->hw_enc_features, | |
1045 | BOND_ENC_FEATURES); | |
b6fe83e9 | 1046 | dst_release_flag &= slave->dev->priv_flags; |
54ef3137 JV |
1047 | if (slave->dev->hard_header_len > max_hard_header_len) |
1048 | max_hard_header_len = slave->dev->hard_header_len; | |
0e376bd0 SB |
1049 | |
1050 | gso_max_size = min(gso_max_size, slave->dev->gso_max_size); | |
1051 | gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs); | |
54ef3137 | 1052 | } |
8531c5ff | 1053 | |
b63365a2 | 1054 | done: |
b2a103e6 | 1055 | bond_dev->vlan_features = vlan_features; |
5a7baa78 | 1056 | bond_dev->hw_enc_features = enc_features; |
54ef3137 | 1057 | bond_dev->hard_header_len = max_hard_header_len; |
0e376bd0 SB |
1058 | bond_dev->gso_max_segs = gso_max_segs; |
1059 | netif_set_gso_max_size(bond_dev, gso_max_size); | |
8531c5ff | 1060 | |
b6fe83e9 ED |
1061 | flags = bond_dev->priv_flags & ~IFF_XMIT_DST_RELEASE; |
1062 | bond_dev->priv_flags = flags | dst_release_flag; | |
1063 | ||
b2a103e6 | 1064 | netdev_change_features(bond_dev); |
8531c5ff AK |
1065 | } |
1066 | ||
872254dd MS |
1067 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1068 | struct net_device *slave_dev) | |
1069 | { | |
00829823 | 1070 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1071 | |
1072 | bond_dev->type = slave_dev->type; | |
1073 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1074 | bond_dev->addr_len = slave_dev->addr_len; | |
1075 | ||
1076 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1077 | slave_dev->addr_len); | |
1078 | } | |
1079 | ||
5b2c4dd2 | 1080 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1081 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1082 | */ |
1083 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1084 | struct slave *slave, |
1085 | struct bonding *bond) | |
5b2c4dd2 | 1086 | { |
2d7011ca | 1087 | if (bond_is_slave_inactive(slave)) { |
01844098 | 1088 | if (BOND_MODE(bond) == BOND_MODE_ALB && |
5b2c4dd2 JP |
1089 | skb->pkt_type != PACKET_BROADCAST && |
1090 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1091 | return false; |
5b2c4dd2 JP |
1092 | return true; |
1093 | } | |
1094 | return false; | |
1095 | } | |
1096 | ||
8a4eb573 | 1097 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1098 | { |
8a4eb573 | 1099 | struct sk_buff *skb = *pskb; |
f1c1775a | 1100 | struct slave *slave; |
0bd80dad | 1101 | struct bonding *bond; |
de063b70 ED |
1102 | int (*recv_probe)(const struct sk_buff *, struct bonding *, |
1103 | struct slave *); | |
13a8e0c8 | 1104 | int ret = RX_HANDLER_ANOTHER; |
5b2c4dd2 | 1105 | |
8a4eb573 JP |
1106 | skb = skb_share_check(skb, GFP_ATOMIC); |
1107 | if (unlikely(!skb)) | |
1108 | return RX_HANDLER_CONSUMED; | |
1109 | ||
1110 | *pskb = skb; | |
5b2c4dd2 | 1111 | |
35d48903 JP |
1112 | slave = bond_slave_get_rcu(skb->dev); |
1113 | bond = slave->bond; | |
0bd80dad | 1114 | |
4d97480b MH |
1115 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1116 | if (recv_probe) { | |
de063b70 ED |
1117 | ret = recv_probe(skb, bond, slave); |
1118 | if (ret == RX_HANDLER_CONSUMED) { | |
1119 | consume_skb(skb); | |
1120 | return ret; | |
3aba891d JP |
1121 | } |
1122 | } | |
1123 | ||
0bd80dad | 1124 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1125 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1126 | } |
1127 | ||
35d48903 | 1128 | skb->dev = bond->dev; |
5b2c4dd2 | 1129 | |
01844098 | 1130 | if (BOND_MODE(bond) == BOND_MODE_ALB && |
35d48903 | 1131 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1132 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1133 | |
541ac7c9 CG |
1134 | if (unlikely(skb_cow_head(skb, |
1135 | skb->data - skb_mac_header(skb)))) { | |
1136 | kfree_skb(skb); | |
8a4eb573 | 1137 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1138 | } |
2a7c183b | 1139 | ether_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr); |
5b2c4dd2 JP |
1140 | } |
1141 | ||
13a8e0c8 | 1142 | return ret; |
5b2c4dd2 JP |
1143 | } |
1144 | ||
471cb5a3 | 1145 | static int bond_master_upper_dev_link(struct net_device *bond_dev, |
1f718f0f VF |
1146 | struct net_device *slave_dev, |
1147 | struct slave *slave) | |
471cb5a3 JP |
1148 | { |
1149 | int err; | |
1150 | ||
1f718f0f | 1151 | err = netdev_master_upper_dev_link_private(slave_dev, bond_dev, slave); |
471cb5a3 JP |
1152 | if (err) |
1153 | return err; | |
1154 | slave_dev->flags |= IFF_SLAVE; | |
7f294054 | 1155 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL); |
471cb5a3 JP |
1156 | return 0; |
1157 | } | |
1158 | ||
1159 | static void bond_upper_dev_unlink(struct net_device *bond_dev, | |
1160 | struct net_device *slave_dev) | |
1161 | { | |
1162 | netdev_upper_dev_unlink(slave_dev, bond_dev); | |
1163 | slave_dev->flags &= ~IFF_SLAVE; | |
7f294054 | 1164 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL); |
471cb5a3 JP |
1165 | } |
1166 | ||
3fdddd85 | 1167 | static struct slave *bond_alloc_slave(struct bonding *bond) |
1168 | { | |
1169 | struct slave *slave = NULL; | |
1170 | ||
1171 | slave = kzalloc(sizeof(struct slave), GFP_KERNEL); | |
1172 | if (!slave) | |
1173 | return NULL; | |
1174 | ||
01844098 | 1175 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
3fdddd85 | 1176 | SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info), |
1177 | GFP_KERNEL); | |
1178 | if (!SLAVE_AD_INFO(slave)) { | |
1179 | kfree(slave); | |
1180 | return NULL; | |
1181 | } | |
1182 | } | |
1183 | return slave; | |
1184 | } | |
1185 | ||
1186 | static void bond_free_slave(struct slave *slave) | |
1187 | { | |
1188 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1189 | ||
01844098 | 1190 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
3fdddd85 | 1191 | kfree(SLAVE_AD_INFO(slave)); |
1192 | ||
1193 | kfree(slave); | |
1194 | } | |
1195 | ||
1da177e4 | 1196 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1197 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1198 | { |
454d7c9b | 1199 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1200 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
c8c23903 | 1201 | struct slave *new_slave = NULL, *prev_slave; |
1da177e4 LT |
1202 | struct sockaddr addr; |
1203 | int link_reporting; | |
8599b52e | 1204 | int res = 0, i; |
1da177e4 | 1205 | |
c772dde3 BH |
1206 | if (!bond->params.use_carrier && |
1207 | slave_dev->ethtool_ops->get_link == NULL && | |
1208 | slave_ops->ndo_do_ioctl == NULL) { | |
76444f50 VF |
1209 | netdev_warn(bond_dev, "no link monitoring support for %s\n", |
1210 | slave_dev->name); | |
1da177e4 LT |
1211 | } |
1212 | ||
1da177e4 LT |
1213 | /* already enslaved */ |
1214 | if (slave_dev->flags & IFF_SLAVE) { | |
76444f50 | 1215 | netdev_dbg(bond_dev, "Error: Device was already enslaved\n"); |
1da177e4 LT |
1216 | return -EBUSY; |
1217 | } | |
1218 | ||
09a89c21 | 1219 | if (bond_dev == slave_dev) { |
76444f50 | 1220 | netdev_err(bond_dev, "cannot enslave bond to itself.\n"); |
09a89c21 JB |
1221 | return -EPERM; |
1222 | } | |
1223 | ||
1da177e4 LT |
1224 | /* vlan challenged mutual exclusion */ |
1225 | /* no need to lock since we're protected by rtnl_lock */ | |
1226 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
76444f50 VF |
1227 | netdev_dbg(bond_dev, "%s is NETIF_F_VLAN_CHALLENGED\n", |
1228 | slave_dev->name); | |
55462cf3 | 1229 | if (vlan_uses_dev(bond_dev)) { |
76444f50 VF |
1230 | netdev_err(bond_dev, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1231 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1232 | return -EPERM; |
1233 | } else { | |
76444f50 VF |
1234 | netdev_warn(bond_dev, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1235 | slave_dev->name, slave_dev->name, | |
1236 | bond_dev->name); | |
1da177e4 LT |
1237 | } |
1238 | } else { | |
76444f50 VF |
1239 | netdev_dbg(bond_dev, "%s is !NETIF_F_VLAN_CHALLENGED\n", |
1240 | slave_dev->name); | |
1da177e4 LT |
1241 | } |
1242 | ||
217df670 JV |
1243 | /* |
1244 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1245 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1246 | * the current ifenslave will set the interface down prior to |
1247 | * enslaving it; the old ifenslave will not. | |
1248 | */ | |
1249 | if ((slave_dev->flags & IFF_UP)) { | |
76444f50 VF |
1250 | netdev_err(bond_dev, "%s is up - this may be due to an out of date ifenslave\n", |
1251 | slave_dev->name); | |
217df670 JV |
1252 | res = -EPERM; |
1253 | goto err_undo_flags; | |
1254 | } | |
1da177e4 | 1255 | |
872254dd MS |
1256 | /* set bonding device ether type by slave - bonding netdevices are |
1257 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1258 | * there is a need to override some of the type dependent attribs/funcs. | |
1259 | * | |
1260 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1261 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1262 | */ | |
0965a1f3 | 1263 | if (!bond_has_slaves(bond)) { |
e36b9d16 | 1264 | if (bond_dev->type != slave_dev->type) { |
76444f50 VF |
1265 | netdev_dbg(bond_dev, "change device type from %d to %d\n", |
1266 | bond_dev->type, slave_dev->type); | |
75c78500 | 1267 | |
b7bc2a5b AW |
1268 | res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, |
1269 | bond_dev); | |
3ca5b404 JP |
1270 | res = notifier_to_errno(res); |
1271 | if (res) { | |
76444f50 | 1272 | netdev_err(bond_dev, "refused to change device type\n"); |
3ca5b404 JP |
1273 | res = -EBUSY; |
1274 | goto err_undo_flags; | |
1275 | } | |
75c78500 | 1276 | |
32a806c1 | 1277 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1278 | dev_uc_flush(bond_dev); |
22bedad3 | 1279 | dev_mc_flush(bond_dev); |
32a806c1 | 1280 | |
e36b9d16 MS |
1281 | if (slave_dev->type != ARPHRD_ETHER) |
1282 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1283 | else { |
e36b9d16 | 1284 | ether_setup(bond_dev); |
550fd08c NH |
1285 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1286 | } | |
75c78500 | 1287 | |
b7bc2a5b AW |
1288 | call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, |
1289 | bond_dev); | |
e36b9d16 | 1290 | } |
872254dd | 1291 | } else if (bond_dev->type != slave_dev->type) { |
76444f50 VF |
1292 | netdev_err(bond_dev, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n", |
1293 | slave_dev->name, slave_dev->type, bond_dev->type); | |
a4aee5c8 JP |
1294 | res = -EINVAL; |
1295 | goto err_undo_flags; | |
872254dd MS |
1296 | } |
1297 | ||
eb7cc59a | 1298 | if (slave_ops->ndo_set_mac_address == NULL) { |
76444f50 | 1299 | netdev_warn(bond_dev, "The slave device specified does not support setting the MAC address\n"); |
f5442441 VF |
1300 | if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && |
1301 | bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
1302 | if (!bond_has_slaves(bond)) { | |
00503b6f | 1303 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
76444f50 | 1304 | netdev_warn(bond_dev, "Setting fail_over_mac to active for active-backup mode\n"); |
f5442441 | 1305 | } else { |
76444f50 | 1306 | netdev_err(bond_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n"); |
f5442441 VF |
1307 | res = -EOPNOTSUPP; |
1308 | goto err_undo_flags; | |
00503b6f | 1309 | } |
2ab82852 | 1310 | } |
1da177e4 LT |
1311 | } |
1312 | ||
8d8fc29d AW |
1313 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1314 | ||
c20811a7 JP |
1315 | /* If this is the first slave, then we need to set the master's hardware |
1316 | * address to be the same as the slave's. */ | |
0965a1f3 | 1317 | if (!bond_has_slaves(bond) && |
dec1e90e | 1318 | bond->dev->addr_assign_type == NET_ADDR_RANDOM) |
409cc1f8 | 1319 | bond_set_dev_addr(bond->dev, slave_dev); |
c20811a7 | 1320 | |
3fdddd85 | 1321 | new_slave = bond_alloc_slave(bond); |
1da177e4 LT |
1322 | if (!new_slave) { |
1323 | res = -ENOMEM; | |
1324 | goto err_undo_flags; | |
1325 | } | |
3fdddd85 | 1326 | |
dc73c41f VF |
1327 | new_slave->bond = bond; |
1328 | new_slave->dev = slave_dev; | |
bb1d9123 AG |
1329 | /* |
1330 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1331 | * is set via sysfs or module option if desired. | |
1332 | */ | |
1333 | new_slave->queue_id = 0; | |
1334 | ||
b15ba0fb JP |
1335 | /* Save slave's original mtu and then set it to match the bond */ |
1336 | new_slave->original_mtu = slave_dev->mtu; | |
1337 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1338 | if (res) { | |
76444f50 | 1339 | netdev_dbg(bond_dev, "Error %d calling dev_set_mtu\n", res); |
b15ba0fb JP |
1340 | goto err_free; |
1341 | } | |
1342 | ||
217df670 JV |
1343 | /* |
1344 | * Save slave's original ("permanent") mac address for modes | |
1345 | * that need it, and for restoring it upon release, and then | |
1346 | * set it to the master's address | |
1347 | */ | |
ada0f863 | 1348 | ether_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr); |
1da177e4 | 1349 | |
00503b6f | 1350 | if (!bond->params.fail_over_mac || |
01844098 | 1351 | BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
2ab82852 MS |
1352 | /* |
1353 | * Set slave to master's mac address. The application already | |
1354 | * set the master's mac address to that of the first slave | |
1355 | */ | |
1356 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1357 | addr.sa_family = slave_dev->type; | |
1358 | res = dev_set_mac_address(slave_dev, &addr); | |
1359 | if (res) { | |
76444f50 | 1360 | netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res); |
b15ba0fb | 1361 | goto err_restore_mtu; |
2ab82852 | 1362 | } |
217df670 | 1363 | } |
1da177e4 | 1364 | |
217df670 JV |
1365 | /* open the slave since the application closed it */ |
1366 | res = dev_open(slave_dev); | |
1367 | if (res) { | |
76444f50 | 1368 | netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name); |
1f718f0f | 1369 | goto err_restore_mac; |
1da177e4 LT |
1370 | } |
1371 | ||
0b680e75 | 1372 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1373 | |
58402054 | 1374 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1375 | /* bond_alb_init_slave() must be called before all other stages since |
1376 | * it might fail and we do not want to have to undo everything | |
1377 | */ | |
1378 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1379 | if (res) |
569f0c4d | 1380 | goto err_close; |
1da177e4 LT |
1381 | } |
1382 | ||
ec0865a9 | 1383 | /* If the mode uses primary, then the following is handled by |
303d1cbf | 1384 | * bond_change_active_slave(). |
1da177e4 | 1385 | */ |
ec0865a9 | 1386 | if (!bond_uses_primary(bond)) { |
1da177e4 LT |
1387 | /* set promiscuity level to new slave */ |
1388 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1389 | res = dev_set_promiscuity(slave_dev, 1); |
1390 | if (res) | |
1391 | goto err_close; | |
1da177e4 LT |
1392 | } |
1393 | ||
1394 | /* set allmulti level to new slave */ | |
1395 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1396 | res = dev_set_allmulti(slave_dev, 1); |
1397 | if (res) | |
1398 | goto err_close; | |
1da177e4 LT |
1399 | } |
1400 | ||
b9e40857 | 1401 | netif_addr_lock_bh(bond_dev); |
303d1cbf JV |
1402 | |
1403 | dev_mc_sync_multiple(slave_dev, bond_dev); | |
1404 | dev_uc_sync_multiple(slave_dev, bond_dev); | |
1405 | ||
b9e40857 | 1406 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1407 | } |
1408 | ||
01844098 | 1409 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
1da177e4 LT |
1410 | /* add lacpdu mc addr to mc list */ |
1411 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1412 | ||
22bedad3 | 1413 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1414 | } |
1415 | ||
b8e2fde4 WY |
1416 | res = vlan_vids_add_by_dev(slave_dev, bond_dev); |
1417 | if (res) { | |
76444f50 VF |
1418 | netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n", |
1419 | slave_dev->name); | |
1ff412ad | 1420 | goto err_close; |
1421 | } | |
1da177e4 | 1422 | |
c8c23903 | 1423 | prev_slave = bond_last_slave(bond); |
1da177e4 LT |
1424 | |
1425 | new_slave->delay = 0; | |
1426 | new_slave->link_failure_count = 0; | |
1427 | ||
876254ae VF |
1428 | bond_update_speed_duplex(new_slave); |
1429 | ||
49f17de7 | 1430 | new_slave->last_rx = jiffies - |
f31c7937 | 1431 | (msecs_to_jiffies(bond->params.arp_interval) + 1); |
8599b52e | 1432 | for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) |
49f17de7 | 1433 | new_slave->target_last_arp_rx[i] = new_slave->last_rx; |
f5b2b966 | 1434 | |
1da177e4 LT |
1435 | if (bond->params.miimon && !bond->params.use_carrier) { |
1436 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1437 | ||
1438 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1439 | /* | |
1440 | * miimon is set but a bonded network driver | |
1441 | * does not support ETHTOOL/MII and | |
1442 | * arp_interval is not set. Note: if | |
1443 | * use_carrier is enabled, we will never go | |
1444 | * here (because netif_carrier is always | |
1445 | * supported); thus, we don't need to change | |
1446 | * the messages for netif_carrier. | |
1447 | */ | |
76444f50 VF |
1448 | netdev_warn(bond_dev, "MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details\n", |
1449 | slave_dev->name); | |
1da177e4 LT |
1450 | } else if (link_reporting == -1) { |
1451 | /* unable get link status using mii/ethtool */ | |
76444f50 VF |
1452 | netdev_warn(bond_dev, "can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface\n", |
1453 | slave_dev->name); | |
1da177e4 LT |
1454 | } |
1455 | } | |
1456 | ||
1457 | /* check for initial state */ | |
f31c7937 MK |
1458 | if (bond->params.miimon) { |
1459 | if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) { | |
1460 | if (bond->params.updelay) { | |
1461 | new_slave->link = BOND_LINK_BACK; | |
1462 | new_slave->delay = bond->params.updelay; | |
1463 | } else { | |
1464 | new_slave->link = BOND_LINK_UP; | |
1465 | } | |
1da177e4 | 1466 | } else { |
f31c7937 | 1467 | new_slave->link = BOND_LINK_DOWN; |
1da177e4 | 1468 | } |
f31c7937 MK |
1469 | } else if (bond->params.arp_interval) { |
1470 | new_slave->link = (netif_carrier_ok(slave_dev) ? | |
1471 | BOND_LINK_UP : BOND_LINK_DOWN); | |
1da177e4 | 1472 | } else { |
f31c7937 | 1473 | new_slave->link = BOND_LINK_UP; |
1da177e4 LT |
1474 | } |
1475 | ||
f31c7937 | 1476 | if (new_slave->link != BOND_LINK_DOWN) |
8e603460 | 1477 | new_slave->last_link_up = jiffies; |
76444f50 VF |
1478 | netdev_dbg(bond_dev, "Initial state of slave_dev is BOND_LINK_%s\n", |
1479 | new_slave->link == BOND_LINK_DOWN ? "DOWN" : | |
1480 | (new_slave->link == BOND_LINK_UP ? "UP" : "BACK")); | |
f31c7937 | 1481 | |
ec0865a9 | 1482 | if (bond_uses_primary(bond) && bond->params.primary[0]) { |
1da177e4 | 1483 | /* if there is a primary slave, remember it */ |
a549952a | 1484 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1485 | bond->primary_slave = new_slave; |
a549952a JP |
1486 | bond->force_primary = true; |
1487 | } | |
1da177e4 LT |
1488 | } |
1489 | ||
01844098 | 1490 | switch (BOND_MODE(bond)) { |
1da177e4 | 1491 | case BOND_MODE_ACTIVEBACKUP: |
5e5b0665 | 1492 | bond_set_slave_inactive_flags(new_slave, |
1493 | BOND_SLAVE_NOTIFY_NOW); | |
1da177e4 LT |
1494 | break; |
1495 | case BOND_MODE_8023AD: | |
1496 | /* in 802.3ad mode, the internal mechanism | |
1497 | * will activate the slaves in the selected | |
1498 | * aggregator | |
1499 | */ | |
5e5b0665 | 1500 | bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW); |
1da177e4 | 1501 | /* if this is the first slave */ |
23c147e0 | 1502 | if (!prev_slave) { |
3fdddd85 | 1503 | SLAVE_AD_INFO(new_slave)->id = 1; |
1da177e4 LT |
1504 | /* Initialize AD with the number of times that the AD timer is called in 1 second |
1505 | * can be called only after the mac address of the bond is set | |
1506 | */ | |
56d00c67 | 1507 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 | 1508 | } else { |
3fdddd85 | 1509 | SLAVE_AD_INFO(new_slave)->id = |
1510 | SLAVE_AD_INFO(prev_slave)->id + 1; | |
1da177e4 LT |
1511 | } |
1512 | ||
1513 | bond_3ad_bind_slave(new_slave); | |
1514 | break; | |
1515 | case BOND_MODE_TLB: | |
1516 | case BOND_MODE_ALB: | |
e30bc066 | 1517 | bond_set_active_slave(new_slave); |
5e5b0665 | 1518 | bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW); |
1da177e4 LT |
1519 | break; |
1520 | default: | |
76444f50 | 1521 | netdev_dbg(bond_dev, "This slave is always active in trunk mode\n"); |
1da177e4 LT |
1522 | |
1523 | /* always active in trunk mode */ | |
e30bc066 | 1524 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1525 | |
1526 | /* In trunking mode there is little meaning to curr_active_slave | |
1527 | * anyway (it holds no special properties of the bond device), | |
1528 | * so we can change it without calling change_active_interface() | |
1529 | */ | |
4740d638 ED |
1530 | if (!rcu_access_pointer(bond->curr_active_slave) && |
1531 | new_slave->link == BOND_LINK_UP) | |
278b2083 | 1532 | rcu_assign_pointer(bond->curr_active_slave, new_slave); |
3d632c3f | 1533 | |
1da177e4 LT |
1534 | break; |
1535 | } /* switch(bond_mode) */ | |
1536 | ||
f6dc31a8 | 1537 | #ifdef CONFIG_NET_POLL_CONTROLLER |
10eccb46 | 1538 | slave_dev->npinfo = bond->dev->npinfo; |
8a8efa22 AW |
1539 | if (slave_dev->npinfo) { |
1540 | if (slave_enable_netpoll(new_slave)) { | |
76444f50 | 1541 | netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n"); |
8a8efa22 | 1542 | res = -EBUSY; |
f7d9821a | 1543 | goto err_detach; |
8a8efa22 | 1544 | } |
f6dc31a8 WC |
1545 | } |
1546 | #endif | |
8a8efa22 | 1547 | |
35d48903 JP |
1548 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1549 | new_slave); | |
1550 | if (res) { | |
76444f50 | 1551 | netdev_dbg(bond_dev, "Error %d calling netdev_rx_handler_register\n", res); |
5831d66e | 1552 | goto err_detach; |
35d48903 JP |
1553 | } |
1554 | ||
1f718f0f VF |
1555 | res = bond_master_upper_dev_link(bond_dev, slave_dev, new_slave); |
1556 | if (res) { | |
76444f50 | 1557 | netdev_dbg(bond_dev, "Error %d calling bond_master_upper_dev_link\n", res); |
1f718f0f VF |
1558 | goto err_unregister; |
1559 | } | |
1560 | ||
07699f9a | 1561 | res = bond_sysfs_slave_add(new_slave); |
1562 | if (res) { | |
76444f50 | 1563 | netdev_dbg(bond_dev, "Error %d calling bond_sysfs_slave_add\n", res); |
07699f9a | 1564 | goto err_upper_unlink; |
1565 | } | |
1566 | ||
5378c2e6 VF |
1567 | bond->slave_cnt++; |
1568 | bond_compute_features(bond); | |
1569 | bond_set_carrier(bond); | |
1570 | ||
ec0865a9 | 1571 | if (bond_uses_primary(bond)) { |
f80889a5 | 1572 | block_netpoll_tx(); |
5378c2e6 VF |
1573 | write_lock_bh(&bond->curr_slave_lock); |
1574 | bond_select_active_slave(bond); | |
1575 | write_unlock_bh(&bond->curr_slave_lock); | |
f80889a5 | 1576 | unblock_netpoll_tx(); |
5378c2e6 | 1577 | } |
1f718f0f | 1578 | |
76444f50 VF |
1579 | netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n", |
1580 | slave_dev->name, | |
1581 | bond_is_active_slave(new_slave) ? "an active" : "a backup", | |
1582 | new_slave->link != BOND_LINK_DOWN ? "an up" : "a down"); | |
1da177e4 LT |
1583 | |
1584 | /* enslave is successful */ | |
1585 | return 0; | |
1586 | ||
1587 | /* Undo stages on error */ | |
07699f9a | 1588 | err_upper_unlink: |
1589 | bond_upper_dev_unlink(bond_dev, slave_dev); | |
1590 | ||
1f718f0f VF |
1591 | err_unregister: |
1592 | netdev_rx_handler_unregister(slave_dev); | |
1593 | ||
f7d9821a | 1594 | err_detach: |
ec0865a9 | 1595 | if (!bond_uses_primary(bond)) |
303d1cbf JV |
1596 | bond_hw_addr_flush(bond_dev, slave_dev); |
1597 | ||
1ff412ad | 1598 | vlan_vids_del_by_dev(slave_dev, bond_dev); |
3c5913b5 | 1599 | if (bond->primary_slave == new_slave) |
1600 | bond->primary_slave = NULL; | |
4740d638 | 1601 | if (rcu_access_pointer(bond->curr_active_slave) == new_slave) { |
f80889a5 | 1602 | block_netpoll_tx(); |
3c5913b5 | 1603 | write_lock_bh(&bond->curr_slave_lock); |
c8517035 | 1604 | bond_change_active_slave(bond, NULL); |
3c5913b5 | 1605 | bond_select_active_slave(bond); |
1606 | write_unlock_bh(&bond->curr_slave_lock); | |
f80889a5 | 1607 | unblock_netpoll_tx(); |
3c5913b5 | 1608 | } |
fc7a72ac | 1609 | slave_disable_netpoll(new_slave); |
f7d9821a | 1610 | |
1da177e4 | 1611 | err_close: |
b6a5a7b9 | 1612 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
1613 | dev_close(slave_dev); |
1614 | ||
1615 | err_restore_mac: | |
00503b6f | 1616 | if (!bond->params.fail_over_mac || |
01844098 | 1617 | BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
3915c1e8 JV |
1618 | /* XXX TODO - fom follow mode needs to change master's |
1619 | * MAC if this slave's MAC is in use by the bond, or at | |
1620 | * least print a warning. | |
1621 | */ | |
ada0f863 | 1622 | ether_addr_copy(addr.sa_data, new_slave->perm_hwaddr); |
2ab82852 MS |
1623 | addr.sa_family = slave_dev->type; |
1624 | dev_set_mac_address(slave_dev, &addr); | |
1625 | } | |
1da177e4 | 1626 | |
b15ba0fb JP |
1627 | err_restore_mtu: |
1628 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1629 | ||
1da177e4 | 1630 | err_free: |
3fdddd85 | 1631 | bond_free_slave(new_slave); |
1da177e4 LT |
1632 | |
1633 | err_undo_flags: | |
b8fad459 | 1634 | /* Enslave of first slave has failed and we need to fix master's mac */ |
0965a1f3 | 1635 | if (!bond_has_slaves(bond) && |
844223ab | 1636 | ether_addr_equal_64bits(bond_dev->dev_addr, slave_dev->dev_addr)) |
b8fad459 | 1637 | eth_hw_addr_random(bond_dev); |
3d632c3f | 1638 | |
1da177e4 LT |
1639 | return res; |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | * Try to release the slave device <slave> from the bond device <master> | |
1644 | * It is legal to access curr_active_slave without a lock because all the function | |
0896341a | 1645 | * is write-locked. If "all" is true it means that the function is being called |
1646 | * while destroying a bond interface and all slaves are being released. | |
1da177e4 LT |
1647 | * |
1648 | * The rules for slave state should be: | |
1649 | * for Active/Backup: | |
1650 | * Active stays on all backups go down | |
1651 | * for Bonded connections: | |
1652 | * The first up interface should be left on and all others downed. | |
1653 | */ | |
0896341a | 1654 | static int __bond_release_one(struct net_device *bond_dev, |
1655 | struct net_device *slave_dev, | |
1656 | bool all) | |
1da177e4 | 1657 | { |
454d7c9b | 1658 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1659 | struct slave *slave, *oldcurrent; |
1660 | struct sockaddr addr; | |
5a0068de | 1661 | int old_flags = bond_dev->flags; |
c8f44aff | 1662 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1663 | |
1664 | /* slave is not a slave or master is not master of this slave */ | |
1665 | if (!(slave_dev->flags & IFF_SLAVE) || | |
471cb5a3 | 1666 | !netdev_has_upper_dev(slave_dev, bond_dev)) { |
76444f50 VF |
1667 | netdev_err(bond_dev, "cannot release %s\n", |
1668 | slave_dev->name); | |
1da177e4 LT |
1669 | return -EINVAL; |
1670 | } | |
1671 | ||
e843fa50 | 1672 | block_netpoll_tx(); |
1da177e4 LT |
1673 | |
1674 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1675 | if (!slave) { | |
1676 | /* not a slave of this bond */ | |
76444f50 VF |
1677 | netdev_info(bond_dev, "%s not enslaved\n", |
1678 | slave_dev->name); | |
e843fa50 | 1679 | unblock_netpoll_tx(); |
1da177e4 LT |
1680 | return -EINVAL; |
1681 | } | |
1682 | ||
07699f9a | 1683 | bond_sysfs_slave_del(slave); |
1684 | ||
1f718f0f | 1685 | bond_upper_dev_unlink(bond_dev, slave_dev); |
35d48903 JP |
1686 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1687 | * for this slave anymore. | |
1688 | */ | |
1689 | netdev_rx_handler_unregister(slave_dev); | |
35d48903 JP |
1690 | write_lock_bh(&bond->lock); |
1691 | ||
1da177e4 | 1692 | /* Inform AD package of unbinding of slave. */ |
01844098 | 1693 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
1da177e4 | 1694 | bond_3ad_unbind_slave(slave); |
be79bd04 | 1695 | |
c8517035 | 1696 | write_unlock_bh(&bond->lock); |
1da177e4 | 1697 | |
76444f50 VF |
1698 | netdev_info(bond_dev, "Releasing %s interface %s\n", |
1699 | bond_is_active_slave(slave) ? "active" : "backup", | |
1700 | slave_dev->name); | |
1da177e4 | 1701 | |
4740d638 | 1702 | oldcurrent = rcu_access_pointer(bond->curr_active_slave); |
1da177e4 | 1703 | |
85741718 | 1704 | RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
1da177e4 | 1705 | |
00503b6f | 1706 | if (!all && (!bond->params.fail_over_mac || |
01844098 | 1707 | BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) { |
844223ab | 1708 | if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) && |
0965a1f3 | 1709 | bond_has_slaves(bond)) |
76444f50 VF |
1710 | netdev_warn(bond_dev, "the permanent HWaddr of %s - %pM - is still in use by %s - set the HWaddr of %s to a different address to avoid conflicts\n", |
1711 | slave_dev->name, slave->perm_hwaddr, | |
1712 | bond_dev->name, slave_dev->name); | |
dec1e90e | 1713 | } |
1714 | ||
3d632c3f | 1715 | if (bond->primary_slave == slave) |
1da177e4 | 1716 | bond->primary_slave = NULL; |
1da177e4 | 1717 | |
c8517035 | 1718 | if (oldcurrent == slave) { |
1719 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 | 1720 | bond_change_active_slave(bond, NULL); |
c8517035 | 1721 | write_unlock_bh(&bond->curr_slave_lock); |
1722 | } | |
1da177e4 | 1723 | |
58402054 | 1724 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1725 | /* Must be called only after the slave has been |
1726 | * detached from the list and the curr_active_slave | |
1727 | * has been cleared (if our_slave == old_current), | |
1728 | * but before a new active slave is selected. | |
1729 | */ | |
1730 | bond_alb_deinit_slave(bond, slave); | |
1731 | } | |
1732 | ||
0896341a | 1733 | if (all) { |
36708b89 | 1734 | RCU_INIT_POINTER(bond->curr_active_slave, NULL); |
0896341a | 1735 | } else if (oldcurrent == slave) { |
059fe7a5 JV |
1736 | /* |
1737 | * Note that we hold RTNL over this sequence, so there | |
1738 | * is no concern that another slave add/remove event | |
1739 | * will interfere. | |
1740 | */ | |
059fe7a5 JV |
1741 | write_lock_bh(&bond->curr_slave_lock); |
1742 | ||
1da177e4 LT |
1743 | bond_select_active_slave(bond); |
1744 | ||
059fe7a5 | 1745 | write_unlock_bh(&bond->curr_slave_lock); |
059fe7a5 JV |
1746 | } |
1747 | ||
0965a1f3 | 1748 | if (!bond_has_slaves(bond)) { |
ff59c456 | 1749 | bond_set_carrier(bond); |
409cc1f8 | 1750 | eth_hw_addr_random(bond_dev); |
1da177e4 LT |
1751 | } |
1752 | ||
e843fa50 | 1753 | unblock_netpoll_tx(); |
278b2083 | 1754 | synchronize_rcu(); |
ee6154e1 | 1755 | bond->slave_cnt--; |
1da177e4 | 1756 | |
0965a1f3 | 1757 | if (!bond_has_slaves(bond)) { |
2af73d4b | 1758 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); |
80028ea1 VF |
1759 | call_netdevice_notifiers(NETDEV_RELEASE, bond->dev); |
1760 | } | |
2af73d4b | 1761 | |
b2a103e6 MM |
1762 | bond_compute_features(bond); |
1763 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1764 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
76444f50 VF |
1765 | netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n", |
1766 | slave_dev->name, bond_dev->name); | |
b2a103e6 | 1767 | |
b76cdba9 | 1768 | /* must do this from outside any spinlocks */ |
1ff412ad | 1769 | vlan_vids_del_by_dev(slave_dev, bond_dev); |
1da177e4 | 1770 | |
ec0865a9 | 1771 | /* If the mode uses primary, then this cases was handled above by |
303d1cbf | 1772 | * bond_change_active_slave(..., NULL) |
1da177e4 | 1773 | */ |
ec0865a9 | 1774 | if (!bond_uses_primary(bond)) { |
5a0068de NH |
1775 | /* unset promiscuity level from slave |
1776 | * NOTE: The NETDEV_CHANGEADDR call above may change the value | |
1777 | * of the IFF_PROMISC flag in the bond_dev, but we need the | |
1778 | * value of that flag before that change, as that was the value | |
1779 | * when this slave was attached, so we cache at the start of the | |
1780 | * function and use it here. Same goes for ALLMULTI below | |
1781 | */ | |
1782 | if (old_flags & IFF_PROMISC) | |
1da177e4 | 1783 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1784 | |
1785 | /* unset allmulti level from slave */ | |
5a0068de | 1786 | if (old_flags & IFF_ALLMULTI) |
1da177e4 | 1787 | dev_set_allmulti(slave_dev, -1); |
1da177e4 | 1788 | |
303d1cbf | 1789 | bond_hw_addr_flush(bond_dev, slave_dev); |
1da177e4 LT |
1790 | } |
1791 | ||
8a8efa22 | 1792 | slave_disable_netpoll(slave); |
f6dc31a8 | 1793 | |
1da177e4 LT |
1794 | /* close slave before restoring its mac address */ |
1795 | dev_close(slave_dev); | |
1796 | ||
00503b6f | 1797 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE || |
01844098 | 1798 | BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
2ab82852 | 1799 | /* restore original ("permanent") mac address */ |
ada0f863 | 1800 | ether_addr_copy(addr.sa_data, slave->perm_hwaddr); |
2ab82852 MS |
1801 | addr.sa_family = slave_dev->type; |
1802 | dev_set_mac_address(slave_dev, &addr); | |
1803 | } | |
1da177e4 | 1804 | |
b15ba0fb JP |
1805 | dev_set_mtu(slave_dev, slave->original_mtu); |
1806 | ||
2d7011ca | 1807 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 | 1808 | |
3fdddd85 | 1809 | bond_free_slave(slave); |
1da177e4 LT |
1810 | |
1811 | return 0; /* deletion OK */ | |
1812 | } | |
1813 | ||
0896341a | 1814 | /* A wrapper used because of ndo_del_link */ |
1815 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) | |
1816 | { | |
1817 | return __bond_release_one(bond_dev, slave_dev, false); | |
1818 | } | |
1819 | ||
d90a162a | 1820 | /* |
dadaa10b | 1821 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
1822 | * Must be under rtnl_lock when this function is called. |
1823 | */ | |
26d8ee75 | 1824 | static int bond_release_and_destroy(struct net_device *bond_dev, |
1825 | struct net_device *slave_dev) | |
d90a162a | 1826 | { |
454d7c9b | 1827 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
1828 | int ret; |
1829 | ||
1830 | ret = bond_release(bond_dev, slave_dev); | |
0965a1f3 | 1831 | if (ret == 0 && !bond_has_slaves(bond)) { |
8a8efa22 | 1832 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
76444f50 VF |
1833 | netdev_info(bond_dev, "Destroying bond %s\n", |
1834 | bond_dev->name); | |
9e71626c | 1835 | unregister_netdevice(bond_dev); |
d90a162a MS |
1836 | } |
1837 | return ret; | |
1838 | } | |
1839 | ||
1da177e4 LT |
1840 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
1841 | { | |
454d7c9b | 1842 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 1843 | |
01844098 | 1844 | info->bond_mode = BOND_MODE(bond); |
1da177e4 LT |
1845 | info->miimon = bond->params.miimon; |
1846 | ||
1da177e4 | 1847 | info->num_slaves = bond->slave_cnt; |
1da177e4 LT |
1848 | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
1853 | { | |
454d7c9b | 1854 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 1855 | struct list_head *iter; |
dec1e90e | 1856 | int i = 0, res = -ENODEV; |
1da177e4 | 1857 | struct slave *slave; |
1da177e4 | 1858 | |
9caff1e7 | 1859 | bond_for_each_slave(bond, slave, iter) { |
dec1e90e | 1860 | if (i++ == (int)info->slave_id) { |
689c96cc ED |
1861 | res = 0; |
1862 | strcpy(info->slave_name, slave->dev->name); | |
1863 | info->link = slave->link; | |
e30bc066 | 1864 | info->state = bond_slave_state(slave); |
689c96cc | 1865 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
1866 | break; |
1867 | } | |
1868 | } | |
1da177e4 | 1869 | |
689c96cc | 1870 | return res; |
1da177e4 LT |
1871 | } |
1872 | ||
1873 | /*-------------------------------- Monitoring -------------------------------*/ | |
1874 | ||
4740d638 | 1875 | /* called with rcu_read_lock() */ |
f0c76d61 JV |
1876 | static int bond_miimon_inspect(struct bonding *bond) |
1877 | { | |
dec1e90e | 1878 | int link_state, commit = 0; |
9caff1e7 | 1879 | struct list_head *iter; |
f0c76d61 | 1880 | struct slave *slave; |
41f89100 JP |
1881 | bool ignore_updelay; |
1882 | ||
4740d638 | 1883 | ignore_updelay = !rcu_dereference(bond->curr_active_slave); |
1da177e4 | 1884 | |
4cb4f97b | 1885 | bond_for_each_slave_rcu(bond, slave, iter) { |
f0c76d61 | 1886 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 1887 | |
f0c76d61 | 1888 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
1889 | |
1890 | switch (slave->link) { | |
f0c76d61 JV |
1891 | case BOND_LINK_UP: |
1892 | if (link_state) | |
1893 | continue; | |
1da177e4 | 1894 | |
f0c76d61 JV |
1895 | slave->link = BOND_LINK_FAIL; |
1896 | slave->delay = bond->params.downdelay; | |
1897 | if (slave->delay) { | |
76444f50 VF |
1898 | netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n", |
1899 | (BOND_MODE(bond) == | |
1900 | BOND_MODE_ACTIVEBACKUP) ? | |
1901 | (bond_is_active_slave(slave) ? | |
1902 | "active " : "backup ") : "", | |
1903 | slave->dev->name, | |
1904 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 1905 | } |
f0c76d61 JV |
1906 | /*FALLTHRU*/ |
1907 | case BOND_LINK_FAIL: | |
1908 | if (link_state) { | |
1909 | /* | |
1910 | * recovered before downdelay expired | |
1911 | */ | |
1912 | slave->link = BOND_LINK_UP; | |
8e603460 | 1913 | slave->last_link_up = jiffies; |
76444f50 VF |
1914 | netdev_info(bond->dev, "link status up again after %d ms for interface %s\n", |
1915 | (bond->params.downdelay - slave->delay) * | |
1916 | bond->params.miimon, | |
1917 | slave->dev->name); | |
f0c76d61 | 1918 | continue; |
1da177e4 | 1919 | } |
f0c76d61 JV |
1920 | |
1921 | if (slave->delay <= 0) { | |
1922 | slave->new_link = BOND_LINK_DOWN; | |
1923 | commit++; | |
1924 | continue; | |
1da177e4 | 1925 | } |
1da177e4 | 1926 | |
f0c76d61 JV |
1927 | slave->delay--; |
1928 | break; | |
1929 | ||
1930 | case BOND_LINK_DOWN: | |
1931 | if (!link_state) | |
1932 | continue; | |
1933 | ||
1934 | slave->link = BOND_LINK_BACK; | |
1935 | slave->delay = bond->params.updelay; | |
1936 | ||
1937 | if (slave->delay) { | |
76444f50 VF |
1938 | netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n", |
1939 | slave->dev->name, | |
1940 | ignore_updelay ? 0 : | |
1941 | bond->params.updelay * | |
1942 | bond->params.miimon); | |
f0c76d61 JV |
1943 | } |
1944 | /*FALLTHRU*/ | |
1945 | case BOND_LINK_BACK: | |
1946 | if (!link_state) { | |
1947 | slave->link = BOND_LINK_DOWN; | |
76444f50 VF |
1948 | netdev_info(bond->dev, "link status down again after %d ms for interface %s\n", |
1949 | (bond->params.updelay - slave->delay) * | |
1950 | bond->params.miimon, | |
1951 | slave->dev->name); | |
f0c76d61 JV |
1952 | |
1953 | continue; | |
1954 | } | |
1955 | ||
41f89100 JP |
1956 | if (ignore_updelay) |
1957 | slave->delay = 0; | |
1958 | ||
f0c76d61 JV |
1959 | if (slave->delay <= 0) { |
1960 | slave->new_link = BOND_LINK_UP; | |
1961 | commit++; | |
41f89100 | 1962 | ignore_updelay = false; |
f0c76d61 | 1963 | continue; |
1da177e4 | 1964 | } |
f0c76d61 JV |
1965 | |
1966 | slave->delay--; | |
1da177e4 | 1967 | break; |
f0c76d61 JV |
1968 | } |
1969 | } | |
1da177e4 | 1970 | |
f0c76d61 JV |
1971 | return commit; |
1972 | } | |
1da177e4 | 1973 | |
f0c76d61 JV |
1974 | static void bond_miimon_commit(struct bonding *bond) |
1975 | { | |
9caff1e7 | 1976 | struct list_head *iter; |
f0c76d61 | 1977 | struct slave *slave; |
f0c76d61 | 1978 | |
9caff1e7 | 1979 | bond_for_each_slave(bond, slave, iter) { |
f0c76d61 JV |
1980 | switch (slave->new_link) { |
1981 | case BOND_LINK_NOCHANGE: | |
1982 | continue; | |
1da177e4 | 1983 | |
f0c76d61 JV |
1984 | case BOND_LINK_UP: |
1985 | slave->link = BOND_LINK_UP; | |
8e603460 | 1986 | slave->last_link_up = jiffies; |
f0c76d61 | 1987 | |
01844098 | 1988 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
f0c76d61 | 1989 | /* prevent it from being the active one */ |
e30bc066 | 1990 | bond_set_backup_slave(slave); |
01844098 | 1991 | } else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) { |
f0c76d61 | 1992 | /* make it immediately active */ |
e30bc066 | 1993 | bond_set_active_slave(slave); |
f0c76d61 JV |
1994 | } else if (slave != bond->primary_slave) { |
1995 | /* prevent it from being the active one */ | |
e30bc066 | 1996 | bond_set_backup_slave(slave); |
1da177e4 | 1997 | } |
1da177e4 | 1998 | |
76444f50 VF |
1999 | netdev_info(bond->dev, "link status definitely up for interface %s, %u Mbps %s duplex\n", |
2000 | slave->dev->name, | |
2001 | slave->speed == SPEED_UNKNOWN ? 0 : slave->speed, | |
2002 | slave->duplex ? "full" : "half"); | |
1da177e4 | 2003 | |
f0c76d61 | 2004 | /* notify ad that the link status has changed */ |
01844098 | 2005 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
f0c76d61 | 2006 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); |
059fe7a5 | 2007 | |
58402054 | 2008 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2009 | bond_alb_handle_link_change(bond, slave, |
2010 | BOND_LINK_UP); | |
1da177e4 | 2011 | |
f0c76d61 JV |
2012 | if (!bond->curr_active_slave || |
2013 | (slave == bond->primary_slave)) | |
2014 | goto do_failover; | |
1da177e4 | 2015 | |
f0c76d61 | 2016 | continue; |
059fe7a5 | 2017 | |
f0c76d61 | 2018 | case BOND_LINK_DOWN: |
fba4acda JV |
2019 | if (slave->link_failure_count < UINT_MAX) |
2020 | slave->link_failure_count++; | |
2021 | ||
f0c76d61 | 2022 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2023 | |
01844098 VF |
2024 | if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP || |
2025 | BOND_MODE(bond) == BOND_MODE_8023AD) | |
5e5b0665 | 2026 | bond_set_slave_inactive_flags(slave, |
2027 | BOND_SLAVE_NOTIFY_NOW); | |
f0c76d61 | 2028 | |
76444f50 VF |
2029 | netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n", |
2030 | slave->dev->name); | |
f0c76d61 | 2031 | |
01844098 | 2032 | if (BOND_MODE(bond) == BOND_MODE_8023AD) |
f0c76d61 JV |
2033 | bond_3ad_handle_link_change(slave, |
2034 | BOND_LINK_DOWN); | |
2035 | ||
ae63e808 | 2036 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2037 | bond_alb_handle_link_change(bond, slave, |
2038 | BOND_LINK_DOWN); | |
2039 | ||
4740d638 | 2040 | if (slave == rcu_access_pointer(bond->curr_active_slave)) |
f0c76d61 JV |
2041 | goto do_failover; |
2042 | ||
2043 | continue; | |
2044 | ||
2045 | default: | |
76444f50 VF |
2046 | netdev_err(bond->dev, "invalid new link %d on slave %s\n", |
2047 | slave->new_link, slave->dev->name); | |
f0c76d61 JV |
2048 | slave->new_link = BOND_LINK_NOCHANGE; |
2049 | ||
2050 | continue; | |
2051 | } | |
2052 | ||
2053 | do_failover: | |
2054 | ASSERT_RTNL(); | |
e843fa50 | 2055 | block_netpoll_tx(); |
f0c76d61 JV |
2056 | write_lock_bh(&bond->curr_slave_lock); |
2057 | bond_select_active_slave(bond); | |
2058 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2059 | unblock_netpoll_tx(); |
f0c76d61 JV |
2060 | } |
2061 | ||
2062 | bond_set_carrier(bond); | |
1da177e4 LT |
2063 | } |
2064 | ||
0b0eef66 JV |
2065 | /* |
2066 | * bond_mii_monitor | |
2067 | * | |
2068 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2069 | * inspection, then (if inspection indicates something needs to be done) |
2070 | * an acquisition of appropriate locks followed by a commit phase to | |
2071 | * implement whatever link state changes are indicated. | |
0b0eef66 | 2072 | */ |
6da67d26 | 2073 | static void bond_mii_monitor(struct work_struct *work) |
0b0eef66 JV |
2074 | { |
2075 | struct bonding *bond = container_of(work, struct bonding, | |
2076 | mii_work.work); | |
ad246c99 | 2077 | bool should_notify_peers = false; |
1f2cd845 | 2078 | unsigned long delay; |
0b0eef66 | 2079 | |
1f2cd845 DM |
2080 | delay = msecs_to_jiffies(bond->params.miimon); |
2081 | ||
2082 | if (!bond_has_slaves(bond)) | |
f0c76d61 | 2083 | goto re_arm; |
b59f9f74 | 2084 | |
4cb4f97b | 2085 | rcu_read_lock(); |
2086 | ||
ad246c99 BH |
2087 | should_notify_peers = bond_should_notify_peers(bond); |
2088 | ||
1f2cd845 | 2089 | if (bond_miimon_inspect(bond)) { |
4cb4f97b | 2090 | rcu_read_unlock(); |
f0c76d61 | 2091 | |
1f2cd845 DM |
2092 | /* Race avoidance with bond_close cancel of workqueue */ |
2093 | if (!rtnl_trylock()) { | |
1f2cd845 DM |
2094 | delay = 1; |
2095 | should_notify_peers = false; | |
2096 | goto re_arm; | |
2097 | } | |
6b6c5261 | 2098 | |
1f2cd845 DM |
2099 | bond_miimon_commit(bond); |
2100 | ||
1f2cd845 | 2101 | rtnl_unlock(); /* might sleep, hold no other locks */ |
4cb4f97b | 2102 | } else |
2103 | rcu_read_unlock(); | |
0b0eef66 | 2104 | |
f0c76d61 | 2105 | re_arm: |
e6d265e8 | 2106 | if (bond->params.miimon) |
1f2cd845 DM |
2107 | queue_delayed_work(bond->wq, &bond->mii_work, delay); |
2108 | ||
1f2cd845 DM |
2109 | if (should_notify_peers) { |
2110 | if (!rtnl_trylock()) | |
2111 | return; | |
2112 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); | |
2113 | rtnl_unlock(); | |
2114 | } | |
0b0eef66 | 2115 | } |
c3ade5ca | 2116 | |
50223ce4 | 2117 | static bool bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2118 | { |
50223ce4 VF |
2119 | struct net_device *upper; |
2120 | struct list_head *iter; | |
2121 | bool ret = false; | |
f5b2b966 | 2122 | |
eaddcd76 | 2123 | if (ip == bond_confirm_addr(bond->dev, 0, ip)) |
50223ce4 | 2124 | return true; |
f5b2b966 | 2125 | |
50223ce4 | 2126 | rcu_read_lock(); |
2f268f12 | 2127 | netdev_for_each_all_upper_dev_rcu(bond->dev, upper, iter) { |
50223ce4 VF |
2128 | if (ip == bond_confirm_addr(upper, 0, ip)) { |
2129 | ret = true; | |
2130 | break; | |
2131 | } | |
f5b2b966 | 2132 | } |
50223ce4 | 2133 | rcu_read_unlock(); |
f5b2b966 | 2134 | |
50223ce4 | 2135 | return ret; |
f5b2b966 JV |
2136 | } |
2137 | ||
c3ade5ca JV |
2138 | /* |
2139 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2140 | * switches in VLAN mode (especially if ports are configured as | |
2141 | * "native" to a VLAN) might not pass non-tagged frames. | |
2142 | */ | |
fbd929f2 | 2143 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, |
2144 | __be32 dest_ip, __be32 src_ip, | |
44a40855 | 2145 | struct bond_vlan_tag *tags) |
c3ade5ca JV |
2146 | { |
2147 | struct sk_buff *skb; | |
3e403a77 | 2148 | struct bond_vlan_tag *outer_tag = tags; |
c3ade5ca | 2149 | |
76444f50 VF |
2150 | netdev_dbg(slave_dev, "arp %d on slave %s: dst %pI4 src %pI4\n", |
2151 | arp_op, slave_dev->name, &dest_ip, &src_ip); | |
3d632c3f | 2152 | |
c3ade5ca JV |
2153 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2154 | NULL, slave_dev->dev_addr, NULL); | |
2155 | ||
2156 | if (!skb) { | |
4873ac3c | 2157 | net_err_ratelimited("ARP packet allocation failed\n"); |
c3ade5ca JV |
2158 | return; |
2159 | } | |
fbd929f2 | 2160 | |
3e403a77 VF |
2161 | if (!tags || tags->vlan_proto == VLAN_N_VID) |
2162 | goto xmit; | |
2163 | ||
2164 | tags++; | |
2165 | ||
44a40855 | 2166 | /* Go through all the tags backwards and add them to the packet */ |
3e403a77 VF |
2167 | while (tags->vlan_proto != VLAN_N_VID) { |
2168 | if (!tags->vlan_id) { | |
2169 | tags++; | |
44a40855 | 2170 | continue; |
3e403a77 | 2171 | } |
44a40855 | 2172 | |
76444f50 | 2173 | netdev_dbg(slave_dev, "inner tag: proto %X vid %X\n", |
3e403a77 VF |
2174 | ntohs(outer_tag->vlan_proto), tags->vlan_id); |
2175 | skb = __vlan_put_tag(skb, tags->vlan_proto, | |
2176 | tags->vlan_id); | |
44a40855 VY |
2177 | if (!skb) { |
2178 | net_err_ratelimited("failed to insert inner VLAN tag\n"); | |
2179 | return; | |
2180 | } | |
3e403a77 VF |
2181 | |
2182 | tags++; | |
44a40855 VY |
2183 | } |
2184 | /* Set the outer tag */ | |
3e403a77 | 2185 | if (outer_tag->vlan_id) { |
76444f50 | 2186 | netdev_dbg(slave_dev, "outer tag: proto %X vid %X\n", |
3e403a77 VF |
2187 | ntohs(outer_tag->vlan_proto), outer_tag->vlan_id); |
2188 | skb = vlan_put_tag(skb, outer_tag->vlan_proto, | |
2189 | outer_tag->vlan_id); | |
c3ade5ca | 2190 | if (!skb) { |
4873ac3c | 2191 | net_err_ratelimited("failed to insert outer VLAN tag\n"); |
c3ade5ca JV |
2192 | return; |
2193 | } | |
2194 | } | |
3e403a77 VF |
2195 | |
2196 | xmit: | |
c3ade5ca JV |
2197 | arp_xmit(skb); |
2198 | } | |
2199 | ||
44a40855 VY |
2200 | /* Validate the device path between the @start_dev and the @end_dev. |
2201 | * The path is valid if the @end_dev is reachable through device | |
2202 | * stacking. | |
2203 | * When the path is validated, collect any vlan information in the | |
2204 | * path. | |
2205 | */ | |
3e403a77 VF |
2206 | struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev, |
2207 | struct net_device *end_dev, | |
2208 | int level) | |
44a40855 | 2209 | { |
3e403a77 | 2210 | struct bond_vlan_tag *tags; |
44a40855 VY |
2211 | struct net_device *upper; |
2212 | struct list_head *iter; | |
44a40855 | 2213 | |
3e403a77 VF |
2214 | if (start_dev == end_dev) { |
2215 | tags = kzalloc(sizeof(*tags) * (level + 1), GFP_ATOMIC); | |
2216 | if (!tags) | |
2217 | return ERR_PTR(-ENOMEM); | |
2218 | tags[level].vlan_proto = VLAN_N_VID; | |
2219 | return tags; | |
2220 | } | |
44a40855 VY |
2221 | |
2222 | netdev_for_each_upper_dev_rcu(start_dev, upper, iter) { | |
3e403a77 VF |
2223 | tags = bond_verify_device_path(upper, end_dev, level + 1); |
2224 | if (IS_ERR_OR_NULL(tags)) { | |
2225 | if (IS_ERR(tags)) | |
2226 | return tags; | |
2227 | continue; | |
44a40855 | 2228 | } |
3e403a77 VF |
2229 | if (is_vlan_dev(upper)) { |
2230 | tags[level].vlan_proto = vlan_dev_vlan_proto(upper); | |
2231 | tags[level].vlan_id = vlan_dev_vlan_id(upper); | |
2232 | } | |
2233 | ||
2234 | return tags; | |
44a40855 VY |
2235 | } |
2236 | ||
3e403a77 | 2237 | return NULL; |
44a40855 | 2238 | } |
c3ade5ca | 2239 | |
1da177e4 LT |
2240 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2241 | { | |
c3ade5ca | 2242 | struct rtable *rt; |
3e403a77 | 2243 | struct bond_vlan_tag *tags; |
27bc11e6 | 2244 | __be32 *targets = bond->params.arp_targets, addr; |
fbd929f2 | 2245 | int i; |
1da177e4 | 2246 | |
27bc11e6 | 2247 | for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) { |
76444f50 | 2248 | netdev_dbg(bond->dev, "basa: target %pI4\n", &targets[i]); |
3e403a77 | 2249 | tags = NULL; |
c3ade5ca | 2250 | |
27bc11e6 | 2251 | /* Find out through which dev should the packet go */ |
78fbfd8a DM |
2252 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2253 | RTO_ONLINK, 0); | |
b23dd4fe | 2254 | if (IS_ERR(rt)) { |
28572760 VF |
2255 | /* there's no route to target - try to send arp |
2256 | * probe to generate any traffic (arp_validate=0) | |
2257 | */ | |
4873ac3c | 2258 | if (bond->params.arp_validate) |
2259 | net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n", | |
2260 | bond->dev->name, | |
2261 | &targets[i]); | |
44a40855 VY |
2262 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2263 | 0, tags); | |
c3ade5ca JV |
2264 | continue; |
2265 | } | |
2266 | ||
27bc11e6 VF |
2267 | /* bond device itself */ |
2268 | if (rt->dst.dev == bond->dev) | |
2269 | goto found; | |
2270 | ||
2271 | rcu_read_lock(); | |
3e403a77 | 2272 | tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0); |
27bc11e6 | 2273 | rcu_read_unlock(); |
c3ade5ca | 2274 | |
3e403a77 | 2275 | if (!IS_ERR_OR_NULL(tags)) |
44a40855 VY |
2276 | goto found; |
2277 | ||
27bc11e6 | 2278 | /* Not our device - skip */ |
76444f50 VF |
2279 | netdev_dbg(bond->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n", |
2280 | &targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL"); | |
3e32582f | 2281 | |
ed4b9f80 | 2282 | ip_rt_put(rt); |
27bc11e6 VF |
2283 | continue; |
2284 | ||
2285 | found: | |
2286 | addr = bond_confirm_addr(rt->dst.dev, targets[i], 0); | |
2287 | ip_rt_put(rt); | |
2288 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
44a40855 | 2289 | addr, tags); |
a67eed57 | 2290 | kfree(tags); |
c3ade5ca JV |
2291 | } |
2292 | } | |
2293 | ||
d3bb52b0 | 2294 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 | 2295 | { |
8599b52e VF |
2296 | int i; |
2297 | ||
87a7b84b | 2298 | if (!sip || !bond_has_this_ip(bond, tip)) { |
76444f50 VF |
2299 | netdev_dbg(bond->dev, "bva: sip %pI4 tip %pI4 not found\n", |
2300 | &sip, &tip); | |
87a7b84b VF |
2301 | return; |
2302 | } | |
f5b2b966 | 2303 | |
8599b52e VF |
2304 | i = bond_get_targets_ip(bond->params.arp_targets, sip); |
2305 | if (i == -1) { | |
76444f50 VF |
2306 | netdev_dbg(bond->dev, "bva: sip %pI4 not found in targets\n", |
2307 | &sip); | |
87a7b84b | 2308 | return; |
f5b2b966 | 2309 | } |
49f17de7 | 2310 | slave->last_rx = jiffies; |
8599b52e | 2311 | slave->target_last_arp_rx[i] = jiffies; |
f5b2b966 JV |
2312 | } |
2313 | ||
5bb9e0b5 | 2314 | int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, |
2315 | struct slave *slave) | |
f5b2b966 | 2316 | { |
de063b70 | 2317 | struct arphdr *arp = (struct arphdr *)skb->data; |
010d3c39 | 2318 | struct slave *curr_active_slave; |
f5b2b966 | 2319 | unsigned char *arp_ptr; |
d3bb52b0 | 2320 | __be32 sip, tip; |
f2cb691a | 2321 | int alen, is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP); |
f5b2b966 | 2322 | |
f2cb691a | 2323 | if (!slave_do_arp_validate(bond, slave)) { |
bedabf90 | 2324 | if ((slave_do_arp_validate_only(bond) && is_arp) || |
2325 | !slave_do_arp_validate_only(bond)) | |
49f17de7 | 2326 | slave->last_rx = jiffies; |
13a8e0c8 | 2327 | return RX_HANDLER_ANOTHER; |
f2cb691a VF |
2328 | } else if (!is_arp) { |
2329 | return RX_HANDLER_ANOTHER; | |
2330 | } | |
2c146102 | 2331 | |
de063b70 | 2332 | alen = arp_hdr_len(bond->dev); |
f5b2b966 | 2333 | |
76444f50 VF |
2334 | netdev_dbg(bond->dev, "bond_arp_rcv: skb->dev %s\n", |
2335 | skb->dev->name); | |
f5b2b966 | 2336 | |
de063b70 ED |
2337 | if (alen > skb_headlen(skb)) { |
2338 | arp = kmalloc(alen, GFP_ATOMIC); | |
2339 | if (!arp) | |
2340 | goto out_unlock; | |
2341 | if (skb_copy_bits(skb, 0, arp, alen) < 0) | |
2342 | goto out_unlock; | |
2343 | } | |
f5b2b966 | 2344 | |
3aba891d | 2345 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2346 | skb->pkt_type == PACKET_OTHERHOST || |
2347 | skb->pkt_type == PACKET_LOOPBACK || | |
2348 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2349 | arp->ar_pro != htons(ETH_P_IP) || | |
2350 | arp->ar_pln != 4) | |
2351 | goto out_unlock; | |
2352 | ||
2353 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2354 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2355 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2356 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2357 | memcpy(&tip, arp_ptr, 4); |
2358 | ||
76444f50 VF |
2359 | netdev_dbg(bond->dev, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
2360 | slave->dev->name, bond_slave_state(slave), | |
2361 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2362 | &sip, &tip); | |
f5b2b966 | 2363 | |
010d3c39 VF |
2364 | curr_active_slave = rcu_dereference(bond->curr_active_slave); |
2365 | ||
f5b2b966 JV |
2366 | /* |
2367 | * Backup slaves won't see the ARP reply, but do come through | |
2368 | * here for each ARP probe (so we swap the sip/tip to validate | |
2369 | * the probe). In a "redundant switch, common router" type of | |
2370 | * configuration, the ARP probe will (hopefully) travel from | |
2371 | * the active, through one switch, the router, then the other | |
2372 | * switch before reaching the backup. | |
aeea64ac VF |
2373 | * |
2374 | * We 'trust' the arp requests if there is an active slave and | |
2375 | * it received valid arp reply(s) after it became active. This | |
2376 | * is done to avoid endless looping when we can't reach the | |
2377 | * arp_ip_target and fool ourselves with our own arp requests. | |
f5b2b966 | 2378 | */ |
010d3c39 | 2379 | |
e30bc066 | 2380 | if (bond_is_active_slave(slave)) |
f5b2b966 | 2381 | bond_validate_arp(bond, slave, sip, tip); |
010d3c39 VF |
2382 | else if (curr_active_slave && |
2383 | time_after(slave_last_rx(bond, curr_active_slave), | |
2384 | curr_active_slave->last_link_up)) | |
f5b2b966 JV |
2385 | bond_validate_arp(bond, slave, tip, sip); |
2386 | ||
2387 | out_unlock: | |
de063b70 ED |
2388 | if (arp != (struct arphdr *)skb->data) |
2389 | kfree(arp); | |
13a8e0c8 | 2390 | return RX_HANDLER_ANOTHER; |
f5b2b966 JV |
2391 | } |
2392 | ||
e7f63f1d VF |
2393 | /* function to verify if we're in the arp_interval timeslice, returns true if |
2394 | * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval + | |
2395 | * arp_interval/2) . the arp_interval/2 is needed for really fast networks. | |
2396 | */ | |
2397 | static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act, | |
2398 | int mod) | |
2399 | { | |
2400 | int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); | |
2401 | ||
2402 | return time_in_range(jiffies, | |
2403 | last_act - delta_in_ticks, | |
2404 | last_act + mod * delta_in_ticks + delta_in_ticks/2); | |
2405 | } | |
2406 | ||
1da177e4 LT |
2407 | /* |
2408 | * this function is called regularly to monitor each slave's link | |
2409 | * ensuring that traffic is being sent and received when arp monitoring | |
2410 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2411 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2412 | * arp monitoring in active backup mode. | |
2413 | */ | |
6da67d26 | 2414 | static void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2415 | { |
1b76b316 JV |
2416 | struct bonding *bond = container_of(work, struct bonding, |
2417 | arp_work.work); | |
1da177e4 | 2418 | struct slave *slave, *oldcurrent; |
9caff1e7 | 2419 | struct list_head *iter; |
6fde8f03 | 2420 | int do_failover = 0, slave_state_changed = 0; |
1da177e4 | 2421 | |
1f2cd845 | 2422 | if (!bond_has_slaves(bond)) |
1da177e4 | 2423 | goto re_arm; |
1da177e4 | 2424 | |
2e52f4fe | 2425 | rcu_read_lock(); |
2426 | ||
4740d638 | 2427 | oldcurrent = rcu_dereference(bond->curr_active_slave); |
1da177e4 LT |
2428 | /* see if any of the previous devices are up now (i.e. they have |
2429 | * xmt and rcv traffic). the curr_active_slave does not come into | |
8e603460 VF |
2430 | * the picture unless it is null. also, slave->last_link_up is not |
2431 | * needed here because we send an arp on each slave and give a slave | |
2432 | * as long as it needs to get the tx/rx within the delta. | |
1da177e4 LT |
2433 | * TODO: what about up/down delay in arp mode? it wasn't here before |
2434 | * so it can wait | |
2435 | */ | |
2e52f4fe | 2436 | bond_for_each_slave_rcu(bond, slave, iter) { |
cb32f2a0 JB |
2437 | unsigned long trans_start = dev_trans_start(slave->dev); |
2438 | ||
1da177e4 | 2439 | if (slave->link != BOND_LINK_UP) { |
e7f63f1d | 2440 | if (bond_time_in_interval(bond, trans_start, 1) && |
49f17de7 | 2441 | bond_time_in_interval(bond, slave->last_rx, 1)) { |
1da177e4 LT |
2442 | |
2443 | slave->link = BOND_LINK_UP; | |
6fde8f03 | 2444 | slave_state_changed = 1; |
1da177e4 LT |
2445 | |
2446 | /* primary_slave has no meaning in round-robin | |
2447 | * mode. the window of a slave being up and | |
2448 | * curr_active_slave being null after enslaving | |
2449 | * is closed. | |
2450 | */ | |
2451 | if (!oldcurrent) { | |
76444f50 VF |
2452 | netdev_info(bond->dev, "link status definitely up for interface %s\n", |
2453 | slave->dev->name); | |
1da177e4 LT |
2454 | do_failover = 1; |
2455 | } else { | |
76444f50 VF |
2456 | netdev_info(bond->dev, "interface %s is now up\n", |
2457 | slave->dev->name); | |
1da177e4 LT |
2458 | } |
2459 | } | |
2460 | } else { | |
2461 | /* slave->link == BOND_LINK_UP */ | |
2462 | ||
2463 | /* not all switches will respond to an arp request | |
2464 | * when the source ip is 0, so don't take the link down | |
2465 | * if we don't know our ip yet | |
2466 | */ | |
e7f63f1d | 2467 | if (!bond_time_in_interval(bond, trans_start, 2) || |
49f17de7 | 2468 | !bond_time_in_interval(bond, slave->last_rx, 2)) { |
1da177e4 LT |
2469 | |
2470 | slave->link = BOND_LINK_DOWN; | |
6fde8f03 | 2471 | slave_state_changed = 1; |
1da177e4 | 2472 | |
3d632c3f | 2473 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2474 | slave->link_failure_count++; |
1da177e4 | 2475 | |
76444f50 VF |
2476 | netdev_info(bond->dev, "interface %s is now down\n", |
2477 | slave->dev->name); | |
1da177e4 | 2478 | |
3d632c3f | 2479 | if (slave == oldcurrent) |
1da177e4 | 2480 | do_failover = 1; |
1da177e4 LT |
2481 | } |
2482 | } | |
2483 | ||
2484 | /* note: if switch is in round-robin mode, all links | |
2485 | * must tx arp to ensure all links rx an arp - otherwise | |
2486 | * links may oscillate or not come up at all; if switch is | |
2487 | * in something like xor mode, there is nothing we can | |
2488 | * do - all replies will be rx'ed on same link causing slaves | |
2489 | * to be unstable during low/no traffic periods | |
2490 | */ | |
b6adc610 | 2491 | if (bond_slave_is_up(slave)) |
1da177e4 | 2492 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2493 | } |
2494 | ||
2e52f4fe | 2495 | rcu_read_unlock(); |
2496 | ||
6fde8f03 | 2497 | if (do_failover || slave_state_changed) { |
2e52f4fe | 2498 | if (!rtnl_trylock()) |
2499 | goto re_arm; | |
1da177e4 | 2500 | |
6fde8f03 DT |
2501 | if (slave_state_changed) { |
2502 | bond_slave_state_change(bond); | |
2503 | } else if (do_failover) { | |
2504 | /* the bond_select_active_slave must hold RTNL | |
2505 | * and curr_slave_lock for write. | |
2506 | */ | |
2507 | block_netpoll_tx(); | |
2508 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 | 2509 | |
6fde8f03 DT |
2510 | bond_select_active_slave(bond); |
2511 | ||
2512 | write_unlock_bh(&bond->curr_slave_lock); | |
2513 | unblock_netpoll_tx(); | |
2514 | } | |
2e52f4fe | 2515 | rtnl_unlock(); |
1da177e4 LT |
2516 | } |
2517 | ||
2518 | re_arm: | |
e6d265e8 | 2519 | if (bond->params.arp_interval) |
e7f63f1d VF |
2520 | queue_delayed_work(bond->wq, &bond->arp_work, |
2521 | msecs_to_jiffies(bond->params.arp_interval)); | |
1da177e4 LT |
2522 | } |
2523 | ||
2524 | /* | |
b2220cad JV |
2525 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2526 | * changes. Sets new_link in slaves to specify what action should take | |
2527 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2528 | * to link states must be committed. | |
2529 | * | |
eb9fa4b0 | 2530 | * Called with rcu_read_lock hold. |
1da177e4 | 2531 | */ |
e7f63f1d | 2532 | static int bond_ab_arp_inspect(struct bonding *bond) |
1da177e4 | 2533 | { |
def4460c | 2534 | unsigned long trans_start, last_rx; |
9caff1e7 | 2535 | struct list_head *iter; |
dec1e90e | 2536 | struct slave *slave; |
dec1e90e | 2537 | int commit = 0; |
da210f55 | 2538 | |
eb9fa4b0 | 2539 | bond_for_each_slave_rcu(bond, slave, iter) { |
b2220cad | 2540 | slave->new_link = BOND_LINK_NOCHANGE; |
def4460c | 2541 | last_rx = slave_last_rx(bond, slave); |
1da177e4 | 2542 | |
b2220cad | 2543 | if (slave->link != BOND_LINK_UP) { |
e7f63f1d | 2544 | if (bond_time_in_interval(bond, last_rx, 1)) { |
b2220cad JV |
2545 | slave->new_link = BOND_LINK_UP; |
2546 | commit++; | |
2547 | } | |
b2220cad JV |
2548 | continue; |
2549 | } | |
1da177e4 | 2550 | |
b2220cad JV |
2551 | /* |
2552 | * Give slaves 2*delta after being enslaved or made | |
2553 | * active. This avoids bouncing, as the last receive | |
2554 | * times need a full ARP monitor cycle to be updated. | |
2555 | */ | |
8e603460 | 2556 | if (bond_time_in_interval(bond, slave->last_link_up, 2)) |
b2220cad JV |
2557 | continue; |
2558 | ||
2559 | /* | |
2560 | * Backup slave is down if: | |
2561 | * - No current_arp_slave AND | |
2562 | * - more than 3*delta since last receive AND | |
2563 | * - the bond has an IP address | |
2564 | * | |
2565 | * Note: a non-null current_arp_slave indicates | |
2566 | * the curr_active_slave went down and we are | |
2567 | * searching for a new one; under this condition | |
2568 | * we only take the curr_active_slave down - this | |
2569 | * gives each slave a chance to tx/rx traffic | |
2570 | * before being taken out | |
2571 | */ | |
e30bc066 | 2572 | if (!bond_is_active_slave(slave) && |
85741718 | 2573 | !rcu_access_pointer(bond->current_arp_slave) && |
e7f63f1d | 2574 | !bond_time_in_interval(bond, last_rx, 3)) { |
b2220cad JV |
2575 | slave->new_link = BOND_LINK_DOWN; |
2576 | commit++; | |
2577 | } | |
2578 | ||
2579 | /* | |
2580 | * Active slave is down if: | |
2581 | * - more than 2*delta since transmitting OR | |
2582 | * - (more than 2*delta since receive AND | |
2583 | * the bond has an IP address) | |
2584 | */ | |
cb32f2a0 | 2585 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2586 | if (bond_is_active_slave(slave) && |
e7f63f1d VF |
2587 | (!bond_time_in_interval(bond, trans_start, 2) || |
2588 | !bond_time_in_interval(bond, last_rx, 2))) { | |
b2220cad JV |
2589 | slave->new_link = BOND_LINK_DOWN; |
2590 | commit++; | |
2591 | } | |
1da177e4 LT |
2592 | } |
2593 | ||
b2220cad JV |
2594 | return commit; |
2595 | } | |
1da177e4 | 2596 | |
b2220cad JV |
2597 | /* |
2598 | * Called to commit link state changes noted by inspection step of | |
2599 | * active-backup mode ARP monitor. | |
2600 | * | |
eb9fa4b0 | 2601 | * Called with RTNL hold. |
b2220cad | 2602 | */ |
e7f63f1d | 2603 | static void bond_ab_arp_commit(struct bonding *bond) |
b2220cad | 2604 | { |
cb32f2a0 | 2605 | unsigned long trans_start; |
9caff1e7 | 2606 | struct list_head *iter; |
dec1e90e | 2607 | struct slave *slave; |
1da177e4 | 2608 | |
9caff1e7 | 2609 | bond_for_each_slave(bond, slave, iter) { |
b2220cad JV |
2610 | switch (slave->new_link) { |
2611 | case BOND_LINK_NOCHANGE: | |
2612 | continue; | |
ff59c456 | 2613 | |
b2220cad | 2614 | case BOND_LINK_UP: |
cb32f2a0 | 2615 | trans_start = dev_trans_start(slave->dev); |
4740d638 ED |
2616 | if (rtnl_dereference(bond->curr_active_slave) != slave || |
2617 | (!rtnl_dereference(bond->curr_active_slave) && | |
e7f63f1d | 2618 | bond_time_in_interval(bond, trans_start, 1))) { |
85741718 ED |
2619 | struct slave *current_arp_slave; |
2620 | ||
2621 | current_arp_slave = rtnl_dereference(bond->current_arp_slave); | |
b2220cad | 2622 | slave->link = BOND_LINK_UP; |
85741718 | 2623 | if (current_arp_slave) { |
5a430974 | 2624 | bond_set_slave_inactive_flags( |
85741718 | 2625 | current_arp_slave, |
5e5b0665 | 2626 | BOND_SLAVE_NOTIFY_NOW); |
85741718 | 2627 | RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
5a430974 | 2628 | } |
b2220cad | 2629 | |
76444f50 VF |
2630 | netdev_info(bond->dev, "link status definitely up for interface %s\n", |
2631 | slave->dev->name); | |
b2220cad | 2632 | |
4740d638 | 2633 | if (!rtnl_dereference(bond->curr_active_slave) || |
b9f60253 JP |
2634 | (slave == bond->primary_slave)) |
2635 | goto do_failover; | |
1da177e4 | 2636 | |
b9f60253 | 2637 | } |
1da177e4 | 2638 | |
b9f60253 | 2639 | continue; |
1da177e4 | 2640 | |
b2220cad JV |
2641 | case BOND_LINK_DOWN: |
2642 | if (slave->link_failure_count < UINT_MAX) | |
2643 | slave->link_failure_count++; | |
2644 | ||
2645 | slave->link = BOND_LINK_DOWN; | |
5e5b0665 | 2646 | bond_set_slave_inactive_flags(slave, |
2647 | BOND_SLAVE_NOTIFY_NOW); | |
b2220cad | 2648 | |
76444f50 VF |
2649 | netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n", |
2650 | slave->dev->name); | |
b2220cad | 2651 | |
4740d638 | 2652 | if (slave == rtnl_dereference(bond->curr_active_slave)) { |
85741718 | 2653 | RCU_INIT_POINTER(bond->current_arp_slave, NULL); |
b9f60253 | 2654 | goto do_failover; |
1da177e4 | 2655 | } |
b9f60253 JP |
2656 | |
2657 | continue; | |
b2220cad JV |
2658 | |
2659 | default: | |
76444f50 VF |
2660 | netdev_err(bond->dev, "impossible: new_link %d on slave %s\n", |
2661 | slave->new_link, slave->dev->name); | |
b9f60253 | 2662 | continue; |
1da177e4 | 2663 | } |
1da177e4 | 2664 | |
b9f60253 JP |
2665 | do_failover: |
2666 | ASSERT_RTNL(); | |
e843fa50 | 2667 | block_netpoll_tx(); |
b2220cad | 2668 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 2669 | bond_select_active_slave(bond); |
b2220cad | 2670 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2671 | unblock_netpoll_tx(); |
b2220cad | 2672 | } |
1da177e4 | 2673 | |
b2220cad JV |
2674 | bond_set_carrier(bond); |
2675 | } | |
1da177e4 | 2676 | |
b2220cad JV |
2677 | /* |
2678 | * Send ARP probes for active-backup mode ARP monitor. | |
b0929915 | 2679 | * |
2680 | * Called with rcu_read_lock hold. | |
b2220cad | 2681 | */ |
f2ebd477 | 2682 | static bool bond_ab_arp_probe(struct bonding *bond) |
b2220cad | 2683 | { |
eb9fa4b0 | 2684 | struct slave *slave, *before = NULL, *new_slave = NULL, |
b0929915 | 2685 | *curr_arp_slave = rcu_dereference(bond->current_arp_slave), |
2686 | *curr_active_slave = rcu_dereference(bond->curr_active_slave); | |
4087df87 VF |
2687 | struct list_head *iter; |
2688 | bool found = false; | |
b0929915 | 2689 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
f2ebd477 | 2690 | |
98b90f26 | 2691 | if (curr_arp_slave && curr_active_slave) |
76444f50 VF |
2692 | netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n", |
2693 | curr_arp_slave->dev->name, | |
2694 | curr_active_slave->dev->name); | |
1da177e4 | 2695 | |
98b90f26 VF |
2696 | if (curr_active_slave) { |
2697 | bond_arp_send_all(bond, curr_active_slave); | |
b0929915 | 2698 | return should_notify_rtnl; |
b2220cad | 2699 | } |
1da177e4 | 2700 | |
b2220cad JV |
2701 | /* if we don't have a curr_active_slave, search for the next available |
2702 | * backup slave from the current_arp_slave and make it the candidate | |
2703 | * for becoming the curr_active_slave | |
2704 | */ | |
1da177e4 | 2705 | |
eb9fa4b0 | 2706 | if (!curr_arp_slave) { |
b0929915 | 2707 | curr_arp_slave = bond_first_slave_rcu(bond); |
2708 | if (!curr_arp_slave) | |
2709 | return should_notify_rtnl; | |
b2220cad | 2710 | } |
1da177e4 | 2711 | |
b0929915 | 2712 | bond_set_slave_inactive_flags(curr_arp_slave, BOND_SLAVE_NOTIFY_LATER); |
059fe7a5 | 2713 | |
b0929915 | 2714 | bond_for_each_slave_rcu(bond, slave, iter) { |
b6adc610 | 2715 | if (!found && !before && bond_slave_is_up(slave)) |
4087df87 | 2716 | before = slave; |
1da177e4 | 2717 | |
b6adc610 | 2718 | if (found && !new_slave && bond_slave_is_up(slave)) |
4087df87 | 2719 | new_slave = slave; |
b2220cad JV |
2720 | /* if the link state is up at this point, we |
2721 | * mark it down - this can happen if we have | |
2722 | * simultaneous link failures and | |
2723 | * reselect_active_interface doesn't make this | |
2724 | * one the current slave so it is still marked | |
2725 | * up when it is actually down | |
1da177e4 | 2726 | */ |
b6adc610 | 2727 | if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) { |
b2220cad JV |
2728 | slave->link = BOND_LINK_DOWN; |
2729 | if (slave->link_failure_count < UINT_MAX) | |
2730 | slave->link_failure_count++; | |
1da177e4 | 2731 | |
5e5b0665 | 2732 | bond_set_slave_inactive_flags(slave, |
b0929915 | 2733 | BOND_SLAVE_NOTIFY_LATER); |
b2220cad | 2734 | |
76444f50 VF |
2735 | netdev_info(bond->dev, "backup interface %s is now down\n", |
2736 | slave->dev->name); | |
1da177e4 | 2737 | } |
eb9fa4b0 | 2738 | if (slave == curr_arp_slave) |
4087df87 | 2739 | found = true; |
b2220cad | 2740 | } |
4087df87 VF |
2741 | |
2742 | if (!new_slave && before) | |
2743 | new_slave = before; | |
2744 | ||
b0929915 | 2745 | if (!new_slave) |
2746 | goto check_state; | |
4087df87 VF |
2747 | |
2748 | new_slave->link = BOND_LINK_BACK; | |
b0929915 | 2749 | bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER); |
4087df87 | 2750 | bond_arp_send_all(bond, new_slave); |
8e603460 | 2751 | new_slave->last_link_up = jiffies; |
eb9fa4b0 | 2752 | rcu_assign_pointer(bond->current_arp_slave, new_slave); |
f2ebd477 | 2753 | |
b0929915 | 2754 | check_state: |
2755 | bond_for_each_slave_rcu(bond, slave, iter) { | |
2756 | if (slave->should_notify) { | |
2757 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2758 | break; | |
2759 | } | |
2760 | } | |
2761 | return should_notify_rtnl; | |
b2220cad | 2762 | } |
1da177e4 | 2763 | |
6da67d26 | 2764 | static void bond_activebackup_arp_mon(struct work_struct *work) |
b2220cad JV |
2765 | { |
2766 | struct bonding *bond = container_of(work, struct bonding, | |
2767 | arp_work.work); | |
b0929915 | 2768 | bool should_notify_peers = false; |
2769 | bool should_notify_rtnl = false; | |
1f2cd845 | 2770 | int delta_in_ticks; |
1da177e4 | 2771 | |
1f2cd845 DM |
2772 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
2773 | ||
2774 | if (!bond_has_slaves(bond)) | |
b2220cad JV |
2775 | goto re_arm; |
2776 | ||
eb9fa4b0 | 2777 | rcu_read_lock(); |
b0929915 | 2778 | |
ad246c99 BH |
2779 | should_notify_peers = bond_should_notify_peers(bond); |
2780 | ||
b0929915 | 2781 | if (bond_ab_arp_inspect(bond)) { |
2782 | rcu_read_unlock(); | |
2783 | ||
1f2cd845 DM |
2784 | /* Race avoidance with bond_close flush of workqueue */ |
2785 | if (!rtnl_trylock()) { | |
1f2cd845 DM |
2786 | delta_in_ticks = 1; |
2787 | should_notify_peers = false; | |
2788 | goto re_arm; | |
2789 | } | |
b2220cad | 2790 | |
1f2cd845 | 2791 | bond_ab_arp_commit(bond); |
b0929915 | 2792 | |
1f2cd845 | 2793 | rtnl_unlock(); |
b0929915 | 2794 | rcu_read_lock(); |
1f2cd845 DM |
2795 | } |
2796 | ||
b0929915 | 2797 | should_notify_rtnl = bond_ab_arp_probe(bond); |
2798 | rcu_read_unlock(); | |
ad246c99 | 2799 | |
80b9d236 | 2800 | re_arm: |
2801 | if (bond->params.arp_interval) | |
1f2cd845 DM |
2802 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
2803 | ||
b0929915 | 2804 | if (should_notify_peers || should_notify_rtnl) { |
1f2cd845 DM |
2805 | if (!rtnl_trylock()) |
2806 | return; | |
b0929915 | 2807 | |
2808 | if (should_notify_peers) | |
2809 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, | |
2810 | bond->dev); | |
2811 | if (should_notify_rtnl) | |
2812 | bond_slave_state_notify(bond); | |
2813 | ||
1f2cd845 DM |
2814 | rtnl_unlock(); |
2815 | } | |
1da177e4 LT |
2816 | } |
2817 | ||
1da177e4 LT |
2818 | /*-------------------------- netdev event handling --------------------------*/ |
2819 | ||
2820 | /* | |
2821 | * Change device name | |
2822 | */ | |
2823 | static int bond_event_changename(struct bonding *bond) | |
2824 | { | |
1da177e4 LT |
2825 | bond_remove_proc_entry(bond); |
2826 | bond_create_proc_entry(bond); | |
7e083840 | 2827 | |
f073c7ca TI |
2828 | bond_debug_reregister(bond); |
2829 | ||
1da177e4 LT |
2830 | return NOTIFY_DONE; |
2831 | } | |
2832 | ||
3d632c3f SH |
2833 | static int bond_master_netdev_event(unsigned long event, |
2834 | struct net_device *bond_dev) | |
1da177e4 | 2835 | { |
454d7c9b | 2836 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
2837 | |
2838 | switch (event) { | |
2839 | case NETDEV_CHANGENAME: | |
2840 | return bond_event_changename(event_bond); | |
a64d49c3 EB |
2841 | case NETDEV_UNREGISTER: |
2842 | bond_remove_proc_entry(event_bond); | |
2843 | break; | |
2844 | case NETDEV_REGISTER: | |
2845 | bond_create_proc_entry(event_bond); | |
2846 | break; | |
6c8d23f7 | 2847 | case NETDEV_NOTIFY_PEERS: |
2848 | if (event_bond->send_peer_notif) | |
2849 | event_bond->send_peer_notif--; | |
2850 | break; | |
1da177e4 LT |
2851 | default: |
2852 | break; | |
2853 | } | |
2854 | ||
2855 | return NOTIFY_DONE; | |
2856 | } | |
2857 | ||
3d632c3f SH |
2858 | static int bond_slave_netdev_event(unsigned long event, |
2859 | struct net_device *slave_dev) | |
1da177e4 | 2860 | { |
471cb5a3 | 2861 | struct slave *slave = bond_slave_get_rtnl(slave_dev); |
6101391d | 2862 | struct bonding *bond; |
2863 | struct net_device *bond_dev; | |
471cb5a3 JP |
2864 | u32 old_speed; |
2865 | u8 old_duplex; | |
1da177e4 | 2866 | |
6101391d | 2867 | /* A netdev event can be generated while enslaving a device |
2868 | * before netdev_rx_handler_register is called in which case | |
2869 | * slave will be NULL | |
2870 | */ | |
2871 | if (!slave) | |
2872 | return NOTIFY_DONE; | |
2873 | bond_dev = slave->bond->dev; | |
2874 | bond = slave->bond; | |
2875 | ||
1da177e4 LT |
2876 | switch (event) { |
2877 | case NETDEV_UNREGISTER: | |
8d2ada77 | 2878 | if (bond_dev->type != ARPHRD_ETHER) |
471cb5a3 JP |
2879 | bond_release_and_destroy(bond_dev, slave_dev); |
2880 | else | |
2881 | bond_release(bond_dev, slave_dev); | |
1da177e4 | 2882 | break; |
98f41f69 | 2883 | case NETDEV_UP: |
1da177e4 | 2884 | case NETDEV_CHANGE: |
471cb5a3 JP |
2885 | old_speed = slave->speed; |
2886 | old_duplex = slave->duplex; | |
17d04500 | 2887 | |
471cb5a3 | 2888 | bond_update_speed_duplex(slave); |
17d04500 | 2889 | |
01844098 | 2890 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
471cb5a3 JP |
2891 | if (old_speed != slave->speed) |
2892 | bond_3ad_adapter_speed_changed(slave); | |
2893 | if (old_duplex != slave->duplex) | |
2894 | bond_3ad_adapter_duplex_changed(slave); | |
17d04500 | 2895 | } |
1da177e4 LT |
2896 | break; |
2897 | case NETDEV_DOWN: | |
2898 | /* | |
2899 | * ... Or is it this? | |
2900 | */ | |
2901 | break; | |
2902 | case NETDEV_CHANGEMTU: | |
2903 | /* | |
2904 | * TODO: Should slaves be allowed to | |
2905 | * independently alter their MTU? For | |
2906 | * an active-backup bond, slaves need | |
2907 | * not be the same type of device, so | |
2908 | * MTUs may vary. For other modes, | |
2909 | * slaves arguably should have the | |
2910 | * same MTUs. To do this, we'd need to | |
2911 | * take over the slave's change_mtu | |
2912 | * function for the duration of their | |
2913 | * servitude. | |
2914 | */ | |
2915 | break; | |
2916 | case NETDEV_CHANGENAME: | |
3ec775b9 | 2917 | /* we don't care if we don't have primary set */ |
ec0865a9 | 2918 | if (!bond_uses_primary(bond) || |
3ec775b9 VF |
2919 | !bond->params.primary[0]) |
2920 | break; | |
2921 | ||
2922 | if (slave == bond->primary_slave) { | |
2923 | /* slave's name changed - he's no longer primary */ | |
2924 | bond->primary_slave = NULL; | |
2925 | } else if (!strcmp(slave_dev->name, bond->params.primary)) { | |
2926 | /* we have a new primary slave */ | |
2927 | bond->primary_slave = slave; | |
2928 | } else { /* we didn't change primary - exit */ | |
2929 | break; | |
2930 | } | |
2931 | ||
76444f50 VF |
2932 | netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n", |
2933 | bond->primary_slave ? slave_dev->name : "none"); | |
f80889a5 | 2934 | |
2935 | block_netpoll_tx(); | |
3ec775b9 VF |
2936 | write_lock_bh(&bond->curr_slave_lock); |
2937 | bond_select_active_slave(bond); | |
2938 | write_unlock_bh(&bond->curr_slave_lock); | |
f80889a5 | 2939 | unblock_netpoll_tx(); |
1da177e4 | 2940 | break; |
8531c5ff AK |
2941 | case NETDEV_FEAT_CHANGE: |
2942 | bond_compute_features(bond); | |
2943 | break; | |
4aa5dee4 JP |
2944 | case NETDEV_RESEND_IGMP: |
2945 | /* Propagate to master device */ | |
2946 | call_netdevice_notifiers(event, slave->bond->dev); | |
2947 | break; | |
1da177e4 LT |
2948 | default: |
2949 | break; | |
2950 | } | |
2951 | ||
2952 | return NOTIFY_DONE; | |
2953 | } | |
2954 | ||
2955 | /* | |
2956 | * bond_netdev_event: handle netdev notifier chain events. | |
2957 | * | |
2958 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 2959 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
2960 | * locks for us to safely manipulate the slave devices (RTNL lock, |
2961 | * dev_probe_lock). | |
2962 | */ | |
3d632c3f SH |
2963 | static int bond_netdev_event(struct notifier_block *this, |
2964 | unsigned long event, void *ptr) | |
1da177e4 | 2965 | { |
351638e7 | 2966 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 | 2967 | |
76444f50 | 2968 | netdev_dbg(event_dev, "event: %lx\n", event); |
1da177e4 | 2969 | |
0b680e75 JV |
2970 | if (!(event_dev->priv_flags & IFF_BONDING)) |
2971 | return NOTIFY_DONE; | |
2972 | ||
1da177e4 | 2973 | if (event_dev->flags & IFF_MASTER) { |
76444f50 | 2974 | netdev_dbg(event_dev, "IFF_MASTER\n"); |
1da177e4 LT |
2975 | return bond_master_netdev_event(event, event_dev); |
2976 | } | |
2977 | ||
2978 | if (event_dev->flags & IFF_SLAVE) { | |
76444f50 | 2979 | netdev_dbg(event_dev, "IFF_SLAVE\n"); |
1da177e4 LT |
2980 | return bond_slave_netdev_event(event, event_dev); |
2981 | } | |
2982 | ||
2983 | return NOTIFY_DONE; | |
2984 | } | |
2985 | ||
2986 | static struct notifier_block bond_netdev_notifier = { | |
2987 | .notifier_call = bond_netdev_event, | |
2988 | }; | |
2989 | ||
169a3e66 JV |
2990 | /*---------------------------- Hashing Policies -----------------------------*/ |
2991 | ||
32819dc1 NA |
2992 | /* L2 hash helper */ |
2993 | static inline u32 bond_eth_hash(struct sk_buff *skb) | |
6b923cb7 | 2994 | { |
ce04d635 | 2995 | struct ethhdr *ep, hdr_tmp; |
6b923cb7 | 2996 | |
ce04d635 JX |
2997 | ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp); |
2998 | if (ep) | |
2999 | return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto; | |
6b923cb7 JE |
3000 | return 0; |
3001 | } | |
3002 | ||
32819dc1 NA |
3003 | /* Extract the appropriate headers based on bond's xmit policy */ |
3004 | static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, | |
3005 | struct flow_keys *fk) | |
6f6652be | 3006 | { |
32819dc1 | 3007 | const struct ipv6hdr *iph6; |
4394542c | 3008 | const struct iphdr *iph; |
32819dc1 | 3009 | int noff, proto = -1; |
6b923cb7 | 3010 | |
32819dc1 NA |
3011 | if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23) |
3012 | return skb_flow_dissect(skb, fk); | |
3013 | ||
3014 | fk->ports = 0; | |
3015 | noff = skb_network_offset(skb); | |
3016 | if (skb->protocol == htons(ETH_P_IP)) { | |
054bb880 | 3017 | if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph)))) |
32819dc1 | 3018 | return false; |
6b923cb7 | 3019 | iph = ip_hdr(skb); |
32819dc1 NA |
3020 | fk->src = iph->saddr; |
3021 | fk->dst = iph->daddr; | |
3022 | noff += iph->ihl << 2; | |
3023 | if (!ip_is_fragment(iph)) | |
3024 | proto = iph->protocol; | |
3025 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
054bb880 | 3026 | if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph6)))) |
32819dc1 NA |
3027 | return false; |
3028 | iph6 = ipv6_hdr(skb); | |
3029 | fk->src = (__force __be32)ipv6_addr_hash(&iph6->saddr); | |
3030 | fk->dst = (__force __be32)ipv6_addr_hash(&iph6->daddr); | |
3031 | noff += sizeof(*iph6); | |
3032 | proto = iph6->nexthdr; | |
3033 | } else { | |
3034 | return false; | |
6f6652be | 3035 | } |
32819dc1 NA |
3036 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0) |
3037 | fk->ports = skb_flow_get_ports(skb, noff, proto); | |
6f6652be | 3038 | |
32819dc1 | 3039 | return true; |
6f6652be JV |
3040 | } |
3041 | ||
32819dc1 NA |
3042 | /** |
3043 | * bond_xmit_hash - generate a hash value based on the xmit policy | |
3044 | * @bond: bonding device | |
3045 | * @skb: buffer to use for headers | |
32819dc1 NA |
3046 | * |
3047 | * This function will extract the necessary headers from the skb buffer and use | |
3048 | * them to generate a hash based on the xmit_policy set in the bonding device | |
169a3e66 | 3049 | */ |
ee62e868 | 3050 | u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb) |
169a3e66 | 3051 | { |
32819dc1 NA |
3052 | struct flow_keys flow; |
3053 | u32 hash; | |
4394542c | 3054 | |
32819dc1 NA |
3055 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 || |
3056 | !bond_flow_dissect(bond, skb, &flow)) | |
ee62e868 | 3057 | return bond_eth_hash(skb); |
169a3e66 | 3058 | |
32819dc1 NA |
3059 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 || |
3060 | bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23) | |
3061 | hash = bond_eth_hash(skb); | |
3062 | else | |
3063 | hash = (__force u32)flow.ports; | |
3064 | hash ^= (__force u32)flow.dst ^ (__force u32)flow.src; | |
3065 | hash ^= (hash >> 16); | |
3066 | hash ^= (hash >> 8); | |
3067 | ||
ee62e868 | 3068 | return hash; |
169a3e66 JV |
3069 | } |
3070 | ||
1da177e4 LT |
3071 | /*-------------------------- Device entry points ----------------------------*/ |
3072 | ||
fbb0c41b | 3073 | static void bond_work_init_all(struct bonding *bond) |
3074 | { | |
3075 | INIT_DELAYED_WORK(&bond->mcast_work, | |
3076 | bond_resend_igmp_join_requests_delayed); | |
3077 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); | |
3078 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); | |
01844098 | 3079 | if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) |
fbb0c41b | 3080 | INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon); |
3081 | else | |
3082 | INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon); | |
3083 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); | |
3084 | } | |
3085 | ||
3086 | static void bond_work_cancel_all(struct bonding *bond) | |
3087 | { | |
3088 | cancel_delayed_work_sync(&bond->mii_work); | |
3089 | cancel_delayed_work_sync(&bond->arp_work); | |
3090 | cancel_delayed_work_sync(&bond->alb_work); | |
3091 | cancel_delayed_work_sync(&bond->ad_work); | |
3092 | cancel_delayed_work_sync(&bond->mcast_work); | |
3093 | } | |
3094 | ||
1da177e4 LT |
3095 | static int bond_open(struct net_device *bond_dev) |
3096 | { | |
454d7c9b | 3097 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 3098 | struct list_head *iter; |
ba3211cc | 3099 | struct slave *slave; |
1da177e4 | 3100 | |
ba3211cc PP |
3101 | /* reset slave->backup and slave->inactive */ |
3102 | read_lock(&bond->lock); | |
0965a1f3 | 3103 | if (bond_has_slaves(bond)) { |
ba3211cc | 3104 | read_lock(&bond->curr_slave_lock); |
9caff1e7 | 3105 | bond_for_each_slave(bond, slave, iter) { |
4740d638 ED |
3106 | if (bond_uses_primary(bond) && |
3107 | slave != rcu_access_pointer(bond->curr_active_slave)) { | |
5e5b0665 | 3108 | bond_set_slave_inactive_flags(slave, |
3109 | BOND_SLAVE_NOTIFY_NOW); | |
ba3211cc | 3110 | } else { |
5e5b0665 | 3111 | bond_set_slave_active_flags(slave, |
3112 | BOND_SLAVE_NOTIFY_NOW); | |
ba3211cc PP |
3113 | } |
3114 | } | |
3115 | read_unlock(&bond->curr_slave_lock); | |
3116 | } | |
3117 | read_unlock(&bond->lock); | |
3118 | ||
fbb0c41b | 3119 | bond_work_init_all(bond); |
5a37e8ca | 3120 | |
58402054 | 3121 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3122 | /* bond_alb_initialize must be called before the timer |
3123 | * is started. | |
3124 | */ | |
01844098 | 3125 | if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB))) |
b473946a | 3126 | return -ENOMEM; |
e9f0fb88 MB |
3127 | if (bond->params.tlb_dynamic_lb) |
3128 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3129 | } |
3130 | ||
fbb0c41b | 3131 | if (bond->params.miimon) /* link check interval, in milliseconds. */ |
1b76b316 | 3132 | queue_delayed_work(bond->wq, &bond->mii_work, 0); |
1da177e4 LT |
3133 | |
3134 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3135 | queue_delayed_work(bond->wq, &bond->arp_work, 0); |
3fe68df9 | 3136 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3137 | } |
3138 | ||
01844098 | 3139 | if (BOND_MODE(bond) == BOND_MODE_8023AD) { |
1b76b316 | 3140 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3141 | /* register to receive LACPDUs */ |
3aba891d | 3142 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3143 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3144 | } |
3145 | ||
3146 | return 0; | |
3147 | } | |
3148 | ||
3149 | static int bond_close(struct net_device *bond_dev) | |
3150 | { | |
454d7c9b | 3151 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3152 | |
fbb0c41b | 3153 | bond_work_cancel_all(bond); |
6c8d23f7 | 3154 | bond->send_peer_notif = 0; |
ee8487c0 | 3155 | if (bond_is_lb(bond)) |
1da177e4 | 3156 | bond_alb_deinitialize(bond); |
3aba891d | 3157 | bond->recv_probe = NULL; |
1da177e4 LT |
3158 | |
3159 | return 0; | |
3160 | } | |
3161 | ||
28172739 ED |
3162 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3163 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3164 | { |
454d7c9b | 3165 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3166 | struct rtnl_link_stats64 temp; |
9caff1e7 | 3167 | struct list_head *iter; |
1da177e4 | 3168 | struct slave *slave; |
1da177e4 | 3169 | |
28172739 | 3170 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3171 | |
3172 | read_lock_bh(&bond->lock); | |
9caff1e7 | 3173 | bond_for_each_slave(bond, slave, iter) { |
be1f3c2c | 3174 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3175 | dev_get_stats(slave->dev, &temp); |
3176 | ||
3177 | stats->rx_packets += sstats->rx_packets; | |
3178 | stats->rx_bytes += sstats->rx_bytes; | |
3179 | stats->rx_errors += sstats->rx_errors; | |
3180 | stats->rx_dropped += sstats->rx_dropped; | |
3181 | ||
3182 | stats->tx_packets += sstats->tx_packets; | |
3183 | stats->tx_bytes += sstats->tx_bytes; | |
3184 | stats->tx_errors += sstats->tx_errors; | |
3185 | stats->tx_dropped += sstats->tx_dropped; | |
3186 | ||
3187 | stats->multicast += sstats->multicast; | |
3188 | stats->collisions += sstats->collisions; | |
3189 | ||
3190 | stats->rx_length_errors += sstats->rx_length_errors; | |
3191 | stats->rx_over_errors += sstats->rx_over_errors; | |
3192 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3193 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3194 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3195 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3196 | ||
3197 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3198 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3199 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3200 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3201 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb | 3202 | } |
1da177e4 LT |
3203 | read_unlock_bh(&bond->lock); |
3204 | ||
3205 | return stats; | |
3206 | } | |
3207 | ||
3208 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3209 | { | |
080a06e1 | 3210 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3211 | struct net_device *slave_dev = NULL; |
3212 | struct ifbond k_binfo; | |
3213 | struct ifbond __user *u_binfo = NULL; | |
3214 | struct ifslave k_sinfo; | |
3215 | struct ifslave __user *u_sinfo = NULL; | |
3216 | struct mii_ioctl_data *mii = NULL; | |
d1fbd3ed | 3217 | struct bond_opt_value newval; |
387ff911 | 3218 | struct net *net; |
1da177e4 LT |
3219 | int res = 0; |
3220 | ||
76444f50 | 3221 | netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd); |
1da177e4 LT |
3222 | |
3223 | switch (cmd) { | |
1da177e4 LT |
3224 | case SIOCGMIIPHY: |
3225 | mii = if_mii(ifr); | |
3d632c3f | 3226 | if (!mii) |
1da177e4 | 3227 | return -EINVAL; |
3d632c3f | 3228 | |
1da177e4 LT |
3229 | mii->phy_id = 0; |
3230 | /* Fall Through */ | |
3231 | case SIOCGMIIREG: | |
3232 | /* | |
3233 | * We do this again just in case we were called by SIOCGMIIREG | |
3234 | * instead of SIOCGMIIPHY. | |
3235 | */ | |
3236 | mii = if_mii(ifr); | |
3d632c3f | 3237 | if (!mii) |
1da177e4 | 3238 | return -EINVAL; |
3d632c3f | 3239 | |
1da177e4 LT |
3240 | |
3241 | if (mii->reg_num == 1) { | |
1da177e4 | 3242 | mii->val_out = 0; |
6603a6f2 | 3243 | read_lock(&bond->lock); |
1da177e4 | 3244 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3245 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3246 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3247 | |
1da177e4 | 3248 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3249 | read_unlock(&bond->lock); |
1da177e4 LT |
3250 | } |
3251 | ||
3252 | return 0; | |
3253 | case BOND_INFO_QUERY_OLD: | |
3254 | case SIOCBONDINFOQUERY: | |
3255 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3256 | ||
3d632c3f | 3257 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3258 | return -EFAULT; |
1da177e4 LT |
3259 | |
3260 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3261 | if (res == 0 && |
3262 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3263 | return -EFAULT; | |
1da177e4 LT |
3264 | |
3265 | return res; | |
3266 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3267 | case SIOCBONDSLAVEINFOQUERY: | |
3268 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3269 | ||
3d632c3f | 3270 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3271 | return -EFAULT; |
1da177e4 LT |
3272 | |
3273 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3274 | if (res == 0 && |
3275 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3276 | return -EFAULT; | |
1da177e4 LT |
3277 | |
3278 | return res; | |
3279 | default: | |
3280 | /* Go on */ | |
3281 | break; | |
3282 | } | |
3283 | ||
387ff911 G |
3284 | net = dev_net(bond_dev); |
3285 | ||
3286 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1da177e4 | 3287 | return -EPERM; |
1da177e4 | 3288 | |
0917b933 | 3289 | slave_dev = __dev_get_by_name(net, ifr->ifr_slave); |
1da177e4 | 3290 | |
76444f50 | 3291 | netdev_dbg(bond_dev, "slave_dev=%p:\n", slave_dev); |
1da177e4 | 3292 | |
3d632c3f | 3293 | if (!slave_dev) |
0917b933 | 3294 | return -ENODEV; |
1da177e4 | 3295 | |
76444f50 | 3296 | netdev_dbg(bond_dev, "slave_dev->name=%s:\n", slave_dev->name); |
0917b933 YX |
3297 | switch (cmd) { |
3298 | case BOND_ENSLAVE_OLD: | |
3299 | case SIOCBONDENSLAVE: | |
3300 | res = bond_enslave(bond_dev, slave_dev); | |
3301 | break; | |
3302 | case BOND_RELEASE_OLD: | |
3303 | case SIOCBONDRELEASE: | |
3304 | res = bond_release(bond_dev, slave_dev); | |
3305 | break; | |
3306 | case BOND_SETHWADDR_OLD: | |
3307 | case SIOCBONDSETHWADDR: | |
3308 | bond_set_dev_addr(bond_dev, slave_dev); | |
3309 | res = 0; | |
3310 | break; | |
3311 | case BOND_CHANGE_ACTIVE_OLD: | |
3312 | case SIOCBONDCHANGEACTIVE: | |
d1fbd3ed NA |
3313 | bond_opt_initstr(&newval, slave_dev->name); |
3314 | res = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval); | |
0917b933 YX |
3315 | break; |
3316 | default: | |
3317 | res = -EOPNOTSUPP; | |
1da177e4 LT |
3318 | } |
3319 | ||
1da177e4 LT |
3320 | return res; |
3321 | } | |
3322 | ||
d03462b9 | 3323 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3324 | { |
454d7c9b | 3325 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3326 | |
d03462b9 JP |
3327 | if (change & IFF_PROMISC) |
3328 | bond_set_promiscuity(bond, | |
3329 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3330 | |
d03462b9 JP |
3331 | if (change & IFF_ALLMULTI) |
3332 | bond_set_allmulti(bond, | |
3333 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3334 | } | |
1da177e4 | 3335 | |
303d1cbf | 3336 | static void bond_set_rx_mode(struct net_device *bond_dev) |
d03462b9 JP |
3337 | { |
3338 | struct bonding *bond = netdev_priv(bond_dev); | |
9caff1e7 | 3339 | struct list_head *iter; |
303d1cbf | 3340 | struct slave *slave; |
1da177e4 | 3341 | |
80ee5ad2 | 3342 | |
b3241870 | 3343 | rcu_read_lock(); |
ec0865a9 | 3344 | if (bond_uses_primary(bond)) { |
b3241870 | 3345 | slave = rcu_dereference(bond->curr_active_slave); |
303d1cbf JV |
3346 | if (slave) { |
3347 | dev_uc_sync(slave->dev, bond_dev); | |
3348 | dev_mc_sync(slave->dev, bond_dev); | |
3349 | } | |
303d1cbf | 3350 | } else { |
b3241870 | 3351 | bond_for_each_slave_rcu(bond, slave, iter) { |
303d1cbf JV |
3352 | dev_uc_sync_multiple(slave->dev, bond_dev); |
3353 | dev_mc_sync_multiple(slave->dev, bond_dev); | |
3354 | } | |
1da177e4 | 3355 | } |
b3241870 | 3356 | rcu_read_unlock(); |
1da177e4 LT |
3357 | } |
3358 | ||
234bcf8a | 3359 | static int bond_neigh_init(struct neighbour *n) |
00829823 | 3360 | { |
234bcf8a | 3361 | struct bonding *bond = netdev_priv(n->dev); |
234bcf8a SP |
3362 | const struct net_device_ops *slave_ops; |
3363 | struct neigh_parms parms; | |
dec1e90e | 3364 | struct slave *slave; |
234bcf8a SP |
3365 | int ret; |
3366 | ||
dec1e90e | 3367 | slave = bond_first_slave(bond); |
234bcf8a SP |
3368 | if (!slave) |
3369 | return 0; | |
234bcf8a | 3370 | slave_ops = slave->dev->netdev_ops; |
234bcf8a SP |
3371 | if (!slave_ops->ndo_neigh_setup) |
3372 | return 0; | |
3373 | ||
3374 | parms.neigh_setup = NULL; | |
3375 | parms.neigh_cleanup = NULL; | |
3376 | ret = slave_ops->ndo_neigh_setup(slave->dev, &parms); | |
3377 | if (ret) | |
3378 | return ret; | |
3379 | ||
3380 | /* | |
3381 | * Assign slave's neigh_cleanup to neighbour in case cleanup is called | |
3382 | * after the last slave has been detached. Assumes that all slaves | |
3383 | * utilize the same neigh_cleanup (true at this writing as only user | |
3384 | * is ipoib). | |
3385 | */ | |
3386 | n->parms->neigh_cleanup = parms.neigh_cleanup; | |
3387 | ||
3388 | if (!parms.neigh_setup) | |
3389 | return 0; | |
3390 | ||
3391 | return parms.neigh_setup(n); | |
3392 | } | |
3393 | ||
3394 | /* | |
3395 | * The bonding ndo_neigh_setup is called at init time beofre any | |
3396 | * slave exists. So we must declare proxy setup function which will | |
3397 | * be used at run time to resolve the actual slave neigh param setup. | |
9918d5bf VF |
3398 | * |
3399 | * It's also called by master devices (such as vlans) to setup their | |
3400 | * underlying devices. In that case - do nothing, we're already set up from | |
3401 | * our init. | |
234bcf8a SP |
3402 | */ |
3403 | static int bond_neigh_setup(struct net_device *dev, | |
3404 | struct neigh_parms *parms) | |
3405 | { | |
9918d5bf VF |
3406 | /* modify only our neigh_parms */ |
3407 | if (parms->dev == dev) | |
3408 | parms->neigh_setup = bond_neigh_init; | |
00829823 | 3409 | |
00829823 SH |
3410 | return 0; |
3411 | } | |
3412 | ||
1da177e4 LT |
3413 | /* |
3414 | * Change the MTU of all of a master's slaves to match the master | |
3415 | */ | |
3416 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3417 | { | |
454d7c9b | 3418 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 3419 | struct slave *slave, *rollback_slave; |
9caff1e7 | 3420 | struct list_head *iter; |
1da177e4 | 3421 | int res = 0; |
1da177e4 | 3422 | |
76444f50 | 3423 | netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu); |
1da177e4 LT |
3424 | |
3425 | /* Can't hold bond->lock with bh disabled here since | |
3426 | * some base drivers panic. On the other hand we can't | |
3427 | * hold bond->lock without bh disabled because we'll | |
3428 | * deadlock. The only solution is to rely on the fact | |
3429 | * that we're under rtnl_lock here, and the slaves | |
3430 | * list won't change. This doesn't solve the problem | |
3431 | * of setting the slave's MTU while it is | |
3432 | * transmitting, but the assumption is that the base | |
3433 | * driver can handle that. | |
3434 | * | |
3435 | * TODO: figure out a way to safely iterate the slaves | |
3436 | * list, but without holding a lock around the actual | |
3437 | * call to the base driver. | |
3438 | */ | |
3439 | ||
9caff1e7 | 3440 | bond_for_each_slave(bond, slave, iter) { |
76444f50 VF |
3441 | netdev_dbg(bond_dev, "s %p c_m %p\n", |
3442 | slave, slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3443 | |
1da177e4 LT |
3444 | res = dev_set_mtu(slave->dev, new_mtu); |
3445 | ||
3446 | if (res) { | |
3447 | /* If we failed to set the slave's mtu to the new value | |
3448 | * we must abort the operation even in ACTIVE_BACKUP | |
3449 | * mode, because if we allow the backup slaves to have | |
3450 | * different mtu values than the active slave we'll | |
3451 | * need to change their mtu when doing a failover. That | |
3452 | * means changing their mtu from timer context, which | |
3453 | * is probably not a good idea. | |
3454 | */ | |
76444f50 VF |
3455 | netdev_dbg(bond_dev, "err %d %s\n", res, |
3456 | slave->dev->name); | |
1da177e4 LT |
3457 | goto unwind; |
3458 | } | |
3459 | } | |
3460 | ||
3461 | bond_dev->mtu = new_mtu; | |
3462 | ||
3463 | return 0; | |
3464 | ||
3465 | unwind: | |
3466 | /* unwind from head to the slave that failed */ | |
9caff1e7 | 3467 | bond_for_each_slave(bond, rollback_slave, iter) { |
1da177e4 LT |
3468 | int tmp_res; |
3469 | ||
81f23b13 VF |
3470 | if (rollback_slave == slave) |
3471 | break; | |
3472 | ||
3473 | tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu); | |
1da177e4 | 3474 | if (tmp_res) { |
76444f50 VF |
3475 | netdev_dbg(bond_dev, "unwind err %d dev %s\n", |
3476 | tmp_res, rollback_slave->dev->name); | |
1da177e4 LT |
3477 | } |
3478 | } | |
3479 | ||
3480 | return res; | |
3481 | } | |
3482 | ||
3483 | /* | |
3484 | * Change HW address | |
3485 | * | |
3486 | * Note that many devices must be down to change the HW address, and | |
3487 | * downing the master releases all slaves. We can make bonds full of | |
3488 | * bonding devices to test this, however. | |
3489 | */ | |
3490 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3491 | { | |
454d7c9b | 3492 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 3493 | struct slave *slave, *rollback_slave; |
1da177e4 | 3494 | struct sockaddr *sa = addr, tmp_sa; |
9caff1e7 | 3495 | struct list_head *iter; |
1da177e4 | 3496 | int res = 0; |
1da177e4 | 3497 | |
01844098 | 3498 | if (BOND_MODE(bond) == BOND_MODE_ALB) |
eb7cc59a SH |
3499 | return bond_alb_set_mac_address(bond_dev, addr); |
3500 | ||
3501 | ||
76444f50 | 3502 | netdev_dbg(bond_dev, "bond=%p\n", bond); |
1da177e4 | 3503 | |
1b5acd29 JV |
3504 | /* If fail_over_mac is enabled, do nothing and return success. |
3505 | * Returning an error causes ifenslave to fail. | |
dd957c57 | 3506 | */ |
cc689aaa | 3507 | if (bond->params.fail_over_mac && |
01844098 | 3508 | BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) |
dd957c57 | 3509 | return 0; |
2ab82852 | 3510 | |
3d632c3f | 3511 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3512 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3513 | |
3514 | /* Can't hold bond->lock with bh disabled here since | |
3515 | * some base drivers panic. On the other hand we can't | |
3516 | * hold bond->lock without bh disabled because we'll | |
3517 | * deadlock. The only solution is to rely on the fact | |
3518 | * that we're under rtnl_lock here, and the slaves | |
3519 | * list won't change. This doesn't solve the problem | |
3520 | * of setting the slave's hw address while it is | |
3521 | * transmitting, but the assumption is that the base | |
3522 | * driver can handle that. | |
3523 | * | |
3524 | * TODO: figure out a way to safely iterate the slaves | |
3525 | * list, but without holding a lock around the actual | |
3526 | * call to the base driver. | |
3527 | */ | |
3528 | ||
9caff1e7 | 3529 | bond_for_each_slave(bond, slave, iter) { |
76444f50 | 3530 | netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name); |
1da177e4 LT |
3531 | res = dev_set_mac_address(slave->dev, addr); |
3532 | if (res) { | |
3533 | /* TODO: consider downing the slave | |
3534 | * and retry ? | |
3535 | * User should expect communications | |
3536 | * breakage anyway until ARP finish | |
3537 | * updating, so... | |
3538 | */ | |
76444f50 | 3539 | netdev_dbg(bond_dev, "err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3540 | goto unwind; |
3541 | } | |
3542 | } | |
3543 | ||
3544 | /* success */ | |
3545 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3546 | return 0; | |
3547 | ||
3548 | unwind: | |
3549 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3550 | tmp_sa.sa_family = bond_dev->type; | |
3551 | ||
3552 | /* unwind from head to the slave that failed */ | |
9caff1e7 | 3553 | bond_for_each_slave(bond, rollback_slave, iter) { |
1da177e4 LT |
3554 | int tmp_res; |
3555 | ||
81f23b13 VF |
3556 | if (rollback_slave == slave) |
3557 | break; | |
3558 | ||
3559 | tmp_res = dev_set_mac_address(rollback_slave->dev, &tmp_sa); | |
1da177e4 | 3560 | if (tmp_res) { |
76444f50 VF |
3561 | netdev_dbg(bond_dev, "unwind err %d dev %s\n", |
3562 | tmp_res, rollback_slave->dev->name); | |
1da177e4 LT |
3563 | } |
3564 | } | |
3565 | ||
3566 | return res; | |
3567 | } | |
3568 | ||
15077228 NA |
3569 | /** |
3570 | * bond_xmit_slave_id - transmit skb through slave with slave_id | |
3571 | * @bond: bonding device that is transmitting | |
3572 | * @skb: buffer to transmit | |
3573 | * @slave_id: slave id up to slave_cnt-1 through which to transmit | |
3574 | * | |
3575 | * This function tries to transmit through slave with slave_id but in case | |
3576 | * it fails, it tries to find the first available slave for transmission. | |
3577 | * The skb is consumed in all cases, thus the function is void. | |
3578 | */ | |
da131ddb | 3579 | static void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id) |
15077228 | 3580 | { |
9caff1e7 | 3581 | struct list_head *iter; |
15077228 NA |
3582 | struct slave *slave; |
3583 | int i = slave_id; | |
3584 | ||
3585 | /* Here we start from the slave with slave_id */ | |
9caff1e7 | 3586 | bond_for_each_slave_rcu(bond, slave, iter) { |
15077228 | 3587 | if (--i < 0) { |
891ab54d | 3588 | if (bond_slave_can_tx(slave)) { |
15077228 NA |
3589 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3590 | return; | |
3591 | } | |
3592 | } | |
3593 | } | |
3594 | ||
3595 | /* Here we start from the first slave up to slave_id */ | |
3596 | i = slave_id; | |
9caff1e7 | 3597 | bond_for_each_slave_rcu(bond, slave, iter) { |
15077228 NA |
3598 | if (--i < 0) |
3599 | break; | |
891ab54d | 3600 | if (bond_slave_can_tx(slave)) { |
15077228 NA |
3601 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3602 | return; | |
3603 | } | |
3604 | } | |
3605 | /* no slave that can tx has been found */ | |
2bb77ab4 | 3606 | dev_kfree_skb_any(skb); |
15077228 NA |
3607 | } |
3608 | ||
73958329 NA |
3609 | /** |
3610 | * bond_rr_gen_slave_id - generate slave id based on packets_per_slave | |
3611 | * @bond: bonding device to use | |
3612 | * | |
3613 | * Based on the value of the bonding device's packets_per_slave parameter | |
3614 | * this function generates a slave id, which is usually used as the next | |
3615 | * slave to transmit through. | |
3616 | */ | |
3617 | static u32 bond_rr_gen_slave_id(struct bonding *bond) | |
3618 | { | |
73958329 | 3619 | u32 slave_id; |
809fa972 HFS |
3620 | struct reciprocal_value reciprocal_packets_per_slave; |
3621 | int packets_per_slave = bond->params.packets_per_slave; | |
73958329 NA |
3622 | |
3623 | switch (packets_per_slave) { | |
3624 | case 0: | |
3625 | slave_id = prandom_u32(); | |
3626 | break; | |
3627 | case 1: | |
3628 | slave_id = bond->rr_tx_counter; | |
3629 | break; | |
3630 | default: | |
809fa972 HFS |
3631 | reciprocal_packets_per_slave = |
3632 | bond->params.reciprocal_packets_per_slave; | |
73958329 | 3633 | slave_id = reciprocal_divide(bond->rr_tx_counter, |
809fa972 | 3634 | reciprocal_packets_per_slave); |
73958329 NA |
3635 | break; |
3636 | } | |
3637 | bond->rr_tx_counter++; | |
3638 | ||
3639 | return slave_id; | |
3640 | } | |
3641 | ||
1da177e4 LT |
3642 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) |
3643 | { | |
454d7c9b | 3644 | struct bonding *bond = netdev_priv(bond_dev); |
a2fd940f | 3645 | struct iphdr *iph = ip_hdr(skb); |
15077228 | 3646 | struct slave *slave; |
73958329 | 3647 | u32 slave_id; |
1da177e4 | 3648 | |
73958329 | 3649 | /* Start with the curr_active_slave that joined the bond as the |
a2fd940f AG |
3650 | * default for sending IGMP traffic. For failover purposes one |
3651 | * needs to maintain some consistency for the interface that will | |
3652 | * send the join/membership reports. The curr_active_slave found | |
3653 | * will send all of this type of traffic. | |
cf5f9044 | 3654 | */ |
15077228 | 3655 | if (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) { |
278b2083 | 3656 | slave = rcu_dereference(bond->curr_active_slave); |
891ab54d | 3657 | if (slave && bond_slave_can_tx(slave)) |
15077228 NA |
3658 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3659 | else | |
3660 | bond_xmit_slave_id(bond, skb, 0); | |
a2fd940f | 3661 | } else { |
73958329 NA |
3662 | slave_id = bond_rr_gen_slave_id(bond); |
3663 | bond_xmit_slave_id(bond, skb, slave_id % bond->slave_cnt); | |
1da177e4 | 3664 | } |
0693e88e | 3665 | |
ec634fe3 | 3666 | return NETDEV_TX_OK; |
1da177e4 LT |
3667 | } |
3668 | ||
3669 | /* | |
3670 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3671 | * the bond has a usable interface. | |
3672 | */ | |
3673 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3674 | { | |
454d7c9b | 3675 | struct bonding *bond = netdev_priv(bond_dev); |
71bc3b2d | 3676 | struct slave *slave; |
1da177e4 | 3677 | |
278b2083 | 3678 | slave = rcu_dereference(bond->curr_active_slave); |
71bc3b2d | 3679 | if (slave) |
15077228 NA |
3680 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3681 | else | |
2bb77ab4 | 3682 | dev_kfree_skb_any(skb); |
0693e88e | 3683 | |
ec634fe3 | 3684 | return NETDEV_TX_OK; |
1da177e4 LT |
3685 | } |
3686 | ||
32819dc1 | 3687 | /* In bond_xmit_xor() , we determine the output device by using a pre- |
169a3e66 JV |
3688 | * determined xmit_hash_policy(), If the selected device is not enabled, |
3689 | * find the next active slave. | |
1da177e4 LT |
3690 | */ |
3691 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
3692 | { | |
454d7c9b | 3693 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3694 | |
ee62e868 | 3695 | bond_xmit_slave_id(bond, skb, bond_xmit_hash(bond, skb) % bond->slave_cnt); |
0693e88e | 3696 | |
ec634fe3 | 3697 | return NETDEV_TX_OK; |
1da177e4 LT |
3698 | } |
3699 | ||
78a646ce | 3700 | /* in broadcast mode, we send everything to all usable interfaces. */ |
1da177e4 LT |
3701 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) |
3702 | { | |
454d7c9b | 3703 | struct bonding *bond = netdev_priv(bond_dev); |
78a646ce | 3704 | struct slave *slave = NULL; |
9caff1e7 | 3705 | struct list_head *iter; |
1da177e4 | 3706 | |
9caff1e7 | 3707 | bond_for_each_slave_rcu(bond, slave, iter) { |
78a646ce NA |
3708 | if (bond_is_last_slave(bond, slave)) |
3709 | break; | |
b6adc610 | 3710 | if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) { |
78a646ce | 3711 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
1da177e4 | 3712 | |
78a646ce | 3713 | if (!skb2) { |
9152e26d | 3714 | net_err_ratelimited("%s: Error: %s: skb_clone() failed\n", |
3715 | bond_dev->name, __func__); | |
78a646ce | 3716 | continue; |
1da177e4 | 3717 | } |
78a646ce NA |
3718 | /* bond_dev_queue_xmit always returns 0 */ |
3719 | bond_dev_queue_xmit(bond, skb2, slave->dev); | |
1da177e4 LT |
3720 | } |
3721 | } | |
b6adc610 | 3722 | if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) |
78a646ce NA |
3723 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3724 | else | |
2bb77ab4 | 3725 | dev_kfree_skb_any(skb); |
3d632c3f | 3726 | |
ec634fe3 | 3727 | return NETDEV_TX_OK; |
1da177e4 LT |
3728 | } |
3729 | ||
3730 | /*------------------------- Device initialization ---------------------------*/ | |
3731 | ||
bb1d9123 AG |
3732 | /* |
3733 | * Lookup the slave that corresponds to a qid | |
3734 | */ | |
3735 | static inline int bond_slave_override(struct bonding *bond, | |
3736 | struct sk_buff *skb) | |
3737 | { | |
bb1d9123 | 3738 | struct slave *slave = NULL; |
9caff1e7 | 3739 | struct list_head *iter; |
bb1d9123 | 3740 | |
0693e88e MM |
3741 | if (!skb->queue_mapping) |
3742 | return 1; | |
bb1d9123 AG |
3743 | |
3744 | /* Find out if any slaves have the same mapping as this skb. */ | |
3900f290 | 3745 | bond_for_each_slave_rcu(bond, slave, iter) { |
3746 | if (slave->queue_id == skb->queue_mapping) { | |
891ab54d | 3747 | if (bond_slave_can_tx(slave)) { |
3900f290 | 3748 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3749 | return 0; | |
3750 | } | |
3751 | /* If the slave isn't UP, use default transmit policy. */ | |
bb1d9123 AG |
3752 | break; |
3753 | } | |
3754 | } | |
3755 | ||
3900f290 | 3756 | return 1; |
bb1d9123 AG |
3757 | } |
3758 | ||
374eeb5a | 3759 | |
f663dd9a | 3760 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 3761 | void *accel_priv, select_queue_fallback_t fallback) |
bb1d9123 AG |
3762 | { |
3763 | /* | |
3764 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 3765 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
3766 | * skb_tx_hash and will put the skbs in the queue we expect on their |
3767 | * way down to the bonding driver. | |
3768 | */ | |
fd0e435b PO |
3769 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
3770 | ||
374eeb5a NH |
3771 | /* |
3772 | * Save the original txq to restore before passing to the driver | |
3773 | */ | |
df4ab5b3 | 3774 | qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; |
374eeb5a | 3775 | |
fd0e435b | 3776 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 3777 | do { |
fd0e435b | 3778 | txq -= dev->real_num_tx_queues; |
d30ee670 | 3779 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
3780 | } |
3781 | return txq; | |
bb1d9123 AG |
3782 | } |
3783 | ||
0693e88e | 3784 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 3785 | { |
bb1d9123 AG |
3786 | struct bonding *bond = netdev_priv(dev); |
3787 | ||
d1e2e5cd VF |
3788 | if (bond_should_override_tx_queue(bond) && |
3789 | !bond_slave_override(bond, skb)) | |
3790 | return NETDEV_TX_OK; | |
00829823 | 3791 | |
01844098 | 3792 | switch (BOND_MODE(bond)) { |
00829823 SH |
3793 | case BOND_MODE_ROUNDROBIN: |
3794 | return bond_xmit_roundrobin(skb, dev); | |
3795 | case BOND_MODE_ACTIVEBACKUP: | |
3796 | return bond_xmit_activebackup(skb, dev); | |
3797 | case BOND_MODE_XOR: | |
3798 | return bond_xmit_xor(skb, dev); | |
3799 | case BOND_MODE_BROADCAST: | |
3800 | return bond_xmit_broadcast(skb, dev); | |
3801 | case BOND_MODE_8023AD: | |
3802 | return bond_3ad_xmit_xor(skb, dev); | |
3803 | case BOND_MODE_ALB: | |
00829823 | 3804 | return bond_alb_xmit(skb, dev); |
f05b42ea MB |
3805 | case BOND_MODE_TLB: |
3806 | return bond_tlb_xmit(skb, dev); | |
00829823 SH |
3807 | default: |
3808 | /* Should never happen, mode already checked */ | |
76444f50 | 3809 | netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond)); |
00829823 | 3810 | WARN_ON_ONCE(1); |
2bb77ab4 | 3811 | dev_kfree_skb_any(skb); |
00829823 SH |
3812 | return NETDEV_TX_OK; |
3813 | } | |
3814 | } | |
3815 | ||
0693e88e MM |
3816 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
3817 | { | |
3818 | struct bonding *bond = netdev_priv(dev); | |
3819 | netdev_tx_t ret = NETDEV_TX_OK; | |
3820 | ||
3821 | /* | |
3822 | * If we risk deadlock from transmitting this in the | |
3823 | * netpoll path, tell netpoll to queue the frame for later tx | |
3824 | */ | |
054bb880 | 3825 | if (unlikely(is_netpoll_tx_blocked(dev))) |
0693e88e MM |
3826 | return NETDEV_TX_BUSY; |
3827 | ||
278b2083 | 3828 | rcu_read_lock(); |
0965a1f3 | 3829 | if (bond_has_slaves(bond)) |
0693e88e MM |
3830 | ret = __bond_start_xmit(skb, dev); |
3831 | else | |
2bb77ab4 | 3832 | dev_kfree_skb_any(skb); |
278b2083 | 3833 | rcu_read_unlock(); |
0693e88e MM |
3834 | |
3835 | return ret; | |
3836 | } | |
00829823 | 3837 | |
bb5b052f AG |
3838 | static int bond_ethtool_get_settings(struct net_device *bond_dev, |
3839 | struct ethtool_cmd *ecmd) | |
3840 | { | |
3841 | struct bonding *bond = netdev_priv(bond_dev); | |
bb5b052f | 3842 | unsigned long speed = 0; |
9caff1e7 | 3843 | struct list_head *iter; |
dec1e90e | 3844 | struct slave *slave; |
bb5b052f AG |
3845 | |
3846 | ecmd->duplex = DUPLEX_UNKNOWN; | |
3847 | ecmd->port = PORT_OTHER; | |
3848 | ||
8557cd74 | 3849 | /* Since bond_slave_can_tx returns false for all inactive or down slaves, we |
bb5b052f AG |
3850 | * do not need to check mode. Though link speed might not represent |
3851 | * the true receive or transmit bandwidth (not all modes are symmetric) | |
3852 | * this is an accurate maximum. | |
3853 | */ | |
3854 | read_lock(&bond->lock); | |
9caff1e7 | 3855 | bond_for_each_slave(bond, slave, iter) { |
8557cd74 | 3856 | if (bond_slave_can_tx(slave)) { |
bb5b052f AG |
3857 | if (slave->speed != SPEED_UNKNOWN) |
3858 | speed += slave->speed; | |
3859 | if (ecmd->duplex == DUPLEX_UNKNOWN && | |
3860 | slave->duplex != DUPLEX_UNKNOWN) | |
3861 | ecmd->duplex = slave->duplex; | |
3862 | } | |
3863 | } | |
3864 | ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN); | |
3865 | read_unlock(&bond->lock); | |
dec1e90e | 3866 | |
bb5b052f AG |
3867 | return 0; |
3868 | } | |
3869 | ||
217df670 | 3870 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
7826d43f | 3871 | struct ethtool_drvinfo *drvinfo) |
217df670 | 3872 | { |
7826d43f JP |
3873 | strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); |
3874 | strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
3875 | snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d", | |
3876 | BOND_ABI_VERSION); | |
217df670 JV |
3877 | } |
3878 | ||
7282d491 | 3879 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 3880 | .get_drvinfo = bond_ethtool_get_drvinfo, |
bb5b052f | 3881 | .get_settings = bond_ethtool_get_settings, |
fa53ebac | 3882 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
3883 | }; |
3884 | ||
eb7cc59a | 3885 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 3886 | .ndo_init = bond_init, |
9e71626c | 3887 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
3888 | .ndo_open = bond_open, |
3889 | .ndo_stop = bond_close, | |
00829823 | 3890 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 3891 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 3892 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 3893 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 3894 | .ndo_change_rx_flags = bond_change_rx_flags, |
303d1cbf | 3895 | .ndo_set_rx_mode = bond_set_rx_mode, |
eb7cc59a | 3896 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 3897 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 3898 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 3899 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 3900 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 3901 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 3902 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
3903 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
3904 | .ndo_poll_controller = bond_poll_controller, | |
3905 | #endif | |
9232ecca JP |
3906 | .ndo_add_slave = bond_enslave, |
3907 | .ndo_del_slave = bond_release, | |
b2a103e6 | 3908 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
3909 | }; |
3910 | ||
b3f92b63 DG |
3911 | static const struct device_type bond_type = { |
3912 | .name = "bond", | |
3913 | }; | |
3914 | ||
9e2e61fb AW |
3915 | static void bond_destructor(struct net_device *bond_dev) |
3916 | { | |
3917 | struct bonding *bond = netdev_priv(bond_dev); | |
3918 | if (bond->wq) | |
3919 | destroy_workqueue(bond->wq); | |
3920 | free_netdev(bond_dev); | |
3921 | } | |
3922 | ||
0a2a78c4 | 3923 | void bond_setup(struct net_device *bond_dev) |
1da177e4 | 3924 | { |
454d7c9b | 3925 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3926 | |
1da177e4 LT |
3927 | /* initialize rwlocks */ |
3928 | rwlock_init(&bond->lock); | |
3929 | rwlock_init(&bond->curr_slave_lock); | |
d2991f75 | 3930 | bond->params = bonding_defaults; |
1da177e4 LT |
3931 | |
3932 | /* Initialize pointers */ | |
1da177e4 | 3933 | bond->dev = bond_dev; |
1da177e4 LT |
3934 | |
3935 | /* Initialize the device entry points */ | |
181470fc | 3936 | ether_setup(bond_dev); |
eb7cc59a | 3937 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 3938 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 | 3939 | |
9e2e61fb | 3940 | bond_dev->destructor = bond_destructor; |
1da177e4 | 3941 | |
b3f92b63 DG |
3942 | SET_NETDEV_DEVTYPE(bond_dev, &bond_type); |
3943 | ||
1da177e4 LT |
3944 | /* Initialize the device options */ |
3945 | bond_dev->tx_queue_len = 0; | |
3946 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
c565b488 | 3947 | bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT; |
550fd08c | 3948 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 3949 | |
932ff279 | 3950 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
3951 | * transmitting */ |
3952 | bond_dev->features |= NETIF_F_LLTX; | |
3953 | ||
3954 | /* By default, we declare the bond to be fully | |
3955 | * VLAN hardware accelerated capable. Special | |
3956 | * care is taken in the various xmit functions | |
3957 | * when there are slaves that are not hw accel | |
3958 | * capable | |
3959 | */ | |
1da177e4 | 3960 | |
f9399814 WC |
3961 | /* Don't allow bond devices to change network namespaces. */ |
3962 | bond_dev->features |= NETIF_F_NETNS_LOCAL; | |
3963 | ||
b2a103e6 | 3964 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
f646968f PM |
3965 | NETIF_F_HW_VLAN_CTAG_TX | |
3966 | NETIF_F_HW_VLAN_CTAG_RX | | |
3967 | NETIF_F_HW_VLAN_CTAG_FILTER; | |
b2a103e6 | 3968 | |
34324dc2 | 3969 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
5a7baa78 | 3970 | bond_dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL; |
b2a103e6 | 3971 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
3972 | } |
3973 | ||
c67dfb29 EB |
3974 | /* |
3975 | * Destroy a bonding device. | |
3976 | * Must be under rtnl_lock when this function is called. | |
3977 | */ | |
3978 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 3979 | { |
454d7c9b | 3980 | struct bonding *bond = netdev_priv(bond_dev); |
544a028e VF |
3981 | struct list_head *iter; |
3982 | struct slave *slave; | |
a434e43f | 3983 | |
f6dc31a8 WC |
3984 | bond_netpoll_cleanup(bond_dev); |
3985 | ||
c67dfb29 | 3986 | /* Release the bonded slaves */ |
544a028e | 3987 | bond_for_each_slave(bond, slave, iter) |
dec1e90e | 3988 | __bond_release_one(bond_dev, slave->dev, true); |
76444f50 | 3989 | netdev_info(bond_dev, "Released all slaves\n"); |
c67dfb29 | 3990 | |
a434e43f JV |
3991 | list_del(&bond->bond_list); |
3992 | ||
f073c7ca | 3993 | bond_debug_unregister(bond); |
a434e43f JV |
3994 | } |
3995 | ||
1da177e4 LT |
3996 | /*------------------------- Module initialization ---------------------------*/ |
3997 | ||
1da177e4 LT |
3998 | static int bond_check_params(struct bond_params *params) |
3999 | { | |
5a5c5fd4 | 4000 | int arp_validate_value, fail_over_mac_value, primary_reselect_value, i; |
f3253339 | 4001 | struct bond_opt_value newval; |
4002 | const struct bond_opt_value *valptr; | |
8599b52e | 4003 | int arp_all_targets_value; |
f5b2b966 | 4004 | |
1da177e4 LT |
4005 | /* |
4006 | * Convert string parameters. | |
4007 | */ | |
4008 | if (mode) { | |
2b3798d5 NA |
4009 | bond_opt_initstr(&newval, mode); |
4010 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval); | |
4011 | if (!valptr) { | |
4012 | pr_err("Error: Invalid bonding mode \"%s\"\n", mode); | |
1da177e4 LT |
4013 | return -EINVAL; |
4014 | } | |
2b3798d5 | 4015 | bond_mode = valptr->value; |
1da177e4 LT |
4016 | } |
4017 | ||
169a3e66 JV |
4018 | if (xmit_hash_policy) { |
4019 | if ((bond_mode != BOND_MODE_XOR) && | |
f05b42ea MB |
4020 | (bond_mode != BOND_MODE_8023AD) && |
4021 | (bond_mode != BOND_MODE_TLB)) { | |
a4aee5c8 | 4022 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
90194264 | 4023 | bond_mode_name(bond_mode)); |
169a3e66 | 4024 | } else { |
a4b32ce7 NA |
4025 | bond_opt_initstr(&newval, xmit_hash_policy); |
4026 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH), | |
4027 | &newval); | |
4028 | if (!valptr) { | |
a4aee5c8 | 4029 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
169a3e66 JV |
4030 | xmit_hash_policy); |
4031 | return -EINVAL; | |
4032 | } | |
a4b32ce7 | 4033 | xmit_hashtype = valptr->value; |
169a3e66 JV |
4034 | } |
4035 | } | |
4036 | ||
1da177e4 LT |
4037 | if (lacp_rate) { |
4038 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4039 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4040 | bond_mode_name(bond_mode)); | |
1da177e4 | 4041 | } else { |
d3131de7 NA |
4042 | bond_opt_initstr(&newval, lacp_rate); |
4043 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE), | |
4044 | &newval); | |
4045 | if (!valptr) { | |
a4aee5c8 | 4046 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
d3131de7 | 4047 | lacp_rate); |
1da177e4 LT |
4048 | return -EINVAL; |
4049 | } | |
d3131de7 | 4050 | lacp_fast = valptr->value; |
1da177e4 LT |
4051 | } |
4052 | } | |
4053 | ||
fd989c83 | 4054 | if (ad_select) { |
548d28bd | 4055 | bond_opt_initstr(&newval, ad_select); |
9e5f5eeb NA |
4056 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT), |
4057 | &newval); | |
4058 | if (!valptr) { | |
4059 | pr_err("Error: Invalid ad_select \"%s\"\n", ad_select); | |
fd989c83 JV |
4060 | return -EINVAL; |
4061 | } | |
9e5f5eeb NA |
4062 | params->ad_select = valptr->value; |
4063 | if (bond_mode != BOND_MODE_8023AD) | |
91565ebb | 4064 | pr_warn("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4065 | } else { |
4066 | params->ad_select = BOND_AD_STABLE; | |
4067 | } | |
4068 | ||
f5841306 | 4069 | if (max_bonds < 0) { |
91565ebb JP |
4070 | pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4071 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4072 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4073 | } | |
4074 | ||
4075 | if (miimon < 0) { | |
91565ebb JP |
4076 | pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4077 | miimon, INT_MAX); | |
b98d9c66 | 4078 | miimon = 0; |
1da177e4 LT |
4079 | } |
4080 | ||
4081 | if (updelay < 0) { | |
91565ebb JP |
4082 | pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4083 | updelay, INT_MAX); | |
1da177e4 LT |
4084 | updelay = 0; |
4085 | } | |
4086 | ||
4087 | if (downdelay < 0) { | |
91565ebb JP |
4088 | pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4089 | downdelay, INT_MAX); | |
1da177e4 LT |
4090 | downdelay = 0; |
4091 | } | |
4092 | ||
4093 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
91565ebb JP |
4094 | pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4095 | use_carrier); | |
1da177e4 LT |
4096 | use_carrier = 1; |
4097 | } | |
4098 | ||
ad246c99 | 4099 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
91565ebb JP |
4100 | pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", |
4101 | num_peer_notif); | |
ad246c99 BH |
4102 | num_peer_notif = 1; |
4103 | } | |
4104 | ||
834db4bc | 4105 | /* reset values for 802.3ad/TLB/ALB */ |
267bed77 | 4106 | if (!bond_mode_uses_arp(bond_mode)) { |
1da177e4 | 4107 | if (!miimon) { |
91565ebb JP |
4108 | pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n"); |
4109 | pr_warn("Forcing miimon to 100msec\n"); | |
fe9d04af | 4110 | miimon = BOND_DEFAULT_MIIMON; |
1da177e4 LT |
4111 | } |
4112 | } | |
4113 | ||
bb1d9123 | 4114 | if (tx_queues < 1 || tx_queues > 255) { |
91565ebb JP |
4115 | pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n", |
4116 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
bb1d9123 AG |
4117 | tx_queues = BOND_DEFAULT_TX_QUEUES; |
4118 | } | |
4119 | ||
ebd8e497 | 4120 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
91565ebb JP |
4121 | pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n", |
4122 | all_slaves_active); | |
ebd8e497 AG |
4123 | all_slaves_active = 0; |
4124 | } | |
4125 | ||
c2952c31 | 4126 | if (resend_igmp < 0 || resend_igmp > 255) { |
91565ebb JP |
4127 | pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n", |
4128 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
c2952c31 FL |
4129 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
4130 | } | |
4131 | ||
aa59d851 NA |
4132 | bond_opt_initval(&newval, packets_per_slave); |
4133 | if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) { | |
73958329 NA |
4134 | pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n", |
4135 | packets_per_slave, USHRT_MAX); | |
4136 | packets_per_slave = 1; | |
4137 | } | |
4138 | ||
1da177e4 | 4139 | if (bond_mode == BOND_MODE_ALB) { |
a4aee5c8 JP |
4140 | pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n", |
4141 | updelay); | |
1da177e4 LT |
4142 | } |
4143 | ||
4144 | if (!miimon) { | |
4145 | if (updelay || downdelay) { | |
4146 | /* just warn the user the up/down delay will have | |
4147 | * no effect since miimon is zero... | |
4148 | */ | |
91565ebb JP |
4149 | pr_warn("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n", |
4150 | updelay, downdelay); | |
1da177e4 LT |
4151 | } |
4152 | } else { | |
4153 | /* don't allow arp monitoring */ | |
4154 | if (arp_interval) { | |
91565ebb JP |
4155 | pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4156 | miimon, arp_interval); | |
1da177e4 LT |
4157 | arp_interval = 0; |
4158 | } | |
4159 | ||
4160 | if ((updelay % miimon) != 0) { | |
91565ebb JP |
4161 | pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4162 | updelay, miimon, (updelay / miimon) * miimon); | |
1da177e4 LT |
4163 | } |
4164 | ||
4165 | updelay /= miimon; | |
4166 | ||
4167 | if ((downdelay % miimon) != 0) { | |
91565ebb JP |
4168 | pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4169 | downdelay, miimon, | |
4170 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4171 | } |
4172 | ||
4173 | downdelay /= miimon; | |
4174 | } | |
4175 | ||
4176 | if (arp_interval < 0) { | |
91565ebb JP |
4177 | pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4178 | arp_interval, INT_MAX); | |
7bdb04ed | 4179 | arp_interval = 0; |
1da177e4 LT |
4180 | } |
4181 | ||
5a5c5fd4 | 4182 | for (arp_ip_count = 0, i = 0; |
4183 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) { | |
1da177e4 LT |
4184 | /* not complete check, but should be good enough to |
4185 | catch mistakes */ | |
89015c18 | 4186 | __be32 ip; |
4187 | if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) || | |
2807a9fe | 4188 | !bond_is_ip_target_ok(ip)) { |
91565ebb JP |
4189 | pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4190 | arp_ip_target[i]); | |
1da177e4 LT |
4191 | arp_interval = 0; |
4192 | } else { | |
0afee4e8 VF |
4193 | if (bond_get_targets_ip(arp_target, ip) == -1) |
4194 | arp_target[arp_ip_count++] = ip; | |
4195 | else | |
91565ebb JP |
4196 | pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n", |
4197 | &ip); | |
1da177e4 LT |
4198 | } |
4199 | } | |
4200 | ||
4201 | if (arp_interval && !arp_ip_count) { | |
4202 | /* don't allow arping if no arp_ip_target given... */ | |
91565ebb JP |
4203 | pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4204 | arp_interval); | |
1da177e4 LT |
4205 | arp_interval = 0; |
4206 | } | |
4207 | ||
f5b2b966 | 4208 | if (arp_validate) { |
f5b2b966 | 4209 | if (!arp_interval) { |
a4aee5c8 | 4210 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4211 | return -EINVAL; |
4212 | } | |
4213 | ||
16228881 NA |
4214 | bond_opt_initstr(&newval, arp_validate); |
4215 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE), | |
4216 | &newval); | |
4217 | if (!valptr) { | |
a4aee5c8 | 4218 | pr_err("Error: invalid arp_validate \"%s\"\n", |
16228881 | 4219 | arp_validate); |
f5b2b966 JV |
4220 | return -EINVAL; |
4221 | } | |
16228881 NA |
4222 | arp_validate_value = valptr->value; |
4223 | } else { | |
f5b2b966 | 4224 | arp_validate_value = 0; |
16228881 | 4225 | } |
f5b2b966 | 4226 | |
8599b52e VF |
4227 | arp_all_targets_value = 0; |
4228 | if (arp_all_targets) { | |
edf36b24 NA |
4229 | bond_opt_initstr(&newval, arp_all_targets); |
4230 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS), | |
4231 | &newval); | |
4232 | if (!valptr) { | |
8599b52e VF |
4233 | pr_err("Error: invalid arp_all_targets_value \"%s\"\n", |
4234 | arp_all_targets); | |
4235 | arp_all_targets_value = 0; | |
edf36b24 NA |
4236 | } else { |
4237 | arp_all_targets_value = valptr->value; | |
8599b52e VF |
4238 | } |
4239 | } | |
4240 | ||
1da177e4 | 4241 | if (miimon) { |
a4aee5c8 | 4242 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 | 4243 | } else if (arp_interval) { |
16228881 NA |
4244 | valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE, |
4245 | arp_validate_value); | |
a4aee5c8 | 4246 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
16228881 | 4247 | arp_interval, valptr->string, arp_ip_count); |
1da177e4 LT |
4248 | |
4249 | for (i = 0; i < arp_ip_count; i++) | |
90194264 | 4250 | pr_cont(" %s", arp_ip_target[i]); |
1da177e4 | 4251 | |
90194264 | 4252 | pr_cont("\n"); |
1da177e4 | 4253 | |
b8a9787e | 4254 | } else if (max_bonds) { |
1da177e4 LT |
4255 | /* miimon and arp_interval not set, we need one so things |
4256 | * work as expected, see bonding.txt for details | |
4257 | */ | |
90194264 | 4258 | pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details\n"); |
1da177e4 LT |
4259 | } |
4260 | ||
ec0865a9 | 4261 | if (primary && !bond_mode_uses_primary(bond_mode)) { |
1da177e4 LT |
4262 | /* currently, using a primary only makes sense |
4263 | * in active backup, TLB or ALB modes | |
4264 | */ | |
91565ebb JP |
4265 | pr_warn("Warning: %s primary device specified but has no effect in %s mode\n", |
4266 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4267 | primary = NULL; |
4268 | } | |
4269 | ||
a549952a | 4270 | if (primary && primary_reselect) { |
388d3a6d NA |
4271 | bond_opt_initstr(&newval, primary_reselect); |
4272 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT), | |
4273 | &newval); | |
4274 | if (!valptr) { | |
a4aee5c8 | 4275 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
388d3a6d | 4276 | primary_reselect); |
a549952a JP |
4277 | return -EINVAL; |
4278 | } | |
388d3a6d | 4279 | primary_reselect_value = valptr->value; |
a549952a JP |
4280 | } else { |
4281 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4282 | } | |
4283 | ||
3915c1e8 | 4284 | if (fail_over_mac) { |
1df6b6aa NA |
4285 | bond_opt_initstr(&newval, fail_over_mac); |
4286 | valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC), | |
4287 | &newval); | |
4288 | if (!valptr) { | |
a4aee5c8 | 4289 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
1df6b6aa | 4290 | fail_over_mac); |
3915c1e8 JV |
4291 | return -EINVAL; |
4292 | } | |
1df6b6aa | 4293 | fail_over_mac_value = valptr->value; |
3915c1e8 | 4294 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) |
91565ebb | 4295 | pr_warn("Warning: fail_over_mac only affects active-backup mode\n"); |
3915c1e8 JV |
4296 | } else { |
4297 | fail_over_mac_value = BOND_FOM_NONE; | |
4298 | } | |
dd957c57 | 4299 | |
3a7129e5 | 4300 | if (lp_interval == 0) { |
91565ebb JP |
4301 | pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n", |
4302 | INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL); | |
3a7129e5 | 4303 | lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL; |
4304 | } | |
4305 | ||
1da177e4 LT |
4306 | /* fill params struct with the proper values */ |
4307 | params->mode = bond_mode; | |
169a3e66 | 4308 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4309 | params->miimon = miimon; |
ad246c99 | 4310 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4311 | params->arp_interval = arp_interval; |
f5b2b966 | 4312 | params->arp_validate = arp_validate_value; |
8599b52e | 4313 | params->arp_all_targets = arp_all_targets_value; |
1da177e4 LT |
4314 | params->updelay = updelay; |
4315 | params->downdelay = downdelay; | |
4316 | params->use_carrier = use_carrier; | |
4317 | params->lacp_fast = lacp_fast; | |
4318 | params->primary[0] = 0; | |
a549952a | 4319 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4320 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4321 | params->tx_queues = tx_queues; |
ebd8e497 | 4322 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4323 | params->resend_igmp = resend_igmp; |
655f8919 | 4324 | params->min_links = min_links; |
3a7129e5 | 4325 | params->lp_interval = lp_interval; |
809fa972 | 4326 | params->packets_per_slave = packets_per_slave; |
e9f0fb88 | 4327 | params->tlb_dynamic_lb = 1; /* Default value */ |
809fa972 HFS |
4328 | if (packets_per_slave > 0) { |
4329 | params->reciprocal_packets_per_slave = | |
4330 | reciprocal_value(packets_per_slave); | |
4331 | } else { | |
4332 | /* reciprocal_packets_per_slave is unused if | |
4333 | * packets_per_slave is 0 or 1, just initialize it | |
4334 | */ | |
4335 | params->reciprocal_packets_per_slave = | |
4336 | (struct reciprocal_value) { 0 }; | |
4337 | } | |
4338 | ||
1da177e4 LT |
4339 | if (primary) { |
4340 | strncpy(params->primary, primary, IFNAMSIZ); | |
4341 | params->primary[IFNAMSIZ - 1] = 0; | |
4342 | } | |
4343 | ||
4344 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4345 | ||
4346 | return 0; | |
4347 | } | |
4348 | ||
0daa2303 | 4349 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4350 | static struct lock_class_key bonding_netdev_addr_lock_key; |
49ee4920 | 4351 | static struct lock_class_key bonding_tx_busylock_key; |
0daa2303 | 4352 | |
e8a0464c DM |
4353 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4354 | struct netdev_queue *txq, | |
4355 | void *_unused) | |
c773e847 DM |
4356 | { |
4357 | lockdep_set_class(&txq->_xmit_lock, | |
4358 | &bonding_netdev_xmit_lock_key); | |
4359 | } | |
4360 | ||
4361 | static void bond_set_lockdep_class(struct net_device *dev) | |
4362 | { | |
cf508b12 DM |
4363 | lockdep_set_class(&dev->addr_list_lock, |
4364 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4365 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
49ee4920 | 4366 | dev->qdisc_tx_busylock = &bonding_tx_busylock_key; |
c773e847 DM |
4367 | } |
4368 | ||
181470fc SH |
4369 | /* |
4370 | * Called from registration process | |
4371 | */ | |
4372 | static int bond_init(struct net_device *bond_dev) | |
4373 | { | |
4374 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4375 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4376 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc | 4377 | |
76444f50 | 4378 | netdev_dbg(bond_dev, "Begin bond_init\n"); |
181470fc | 4379 | |
9fe0617d NH |
4380 | /* |
4381 | * Initialize locks that may be required during | |
4382 | * en/deslave operations. All of the bond_open work | |
4383 | * (of which this is part) should really be moved to | |
4384 | * a phase prior to dev_open | |
4385 | */ | |
4386 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4387 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4388 | ||
181470fc SH |
4389 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4390 | if (!bond->wq) | |
4391 | return -ENOMEM; | |
4392 | ||
4393 | bond_set_lockdep_class(bond_dev); | |
4394 | ||
ec87fd3b | 4395 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4396 | |
6151b3d4 | 4397 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4398 | |
f073c7ca TI |
4399 | bond_debug_register(bond); |
4400 | ||
409cc1f8 JP |
4401 | /* Ensure valid dev_addr */ |
4402 | if (is_zero_ether_addr(bond_dev->dev_addr) && | |
97a1e639 | 4403 | bond_dev->addr_assign_type == NET_ADDR_PERM) |
409cc1f8 | 4404 | eth_hw_addr_random(bond_dev); |
409cc1f8 | 4405 | |
181470fc SH |
4406 | return 0; |
4407 | } | |
4408 | ||
0a2a78c4 | 4409 | unsigned int bond_get_num_tx_queues(void) |
d5da4510 | 4410 | { |
efacb309 | 4411 | return tx_queues; |
d5da4510 JP |
4412 | } |
4413 | ||
dfe60397 | 4414 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4415 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4416 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4417 | * set up our sysfs entries. | |
4418 | */ | |
ec87fd3b | 4419 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4420 | { |
4421 | struct net_device *bond_dev; | |
4422 | int res; | |
4423 | ||
4424 | rtnl_lock(); | |
027ea041 | 4425 | |
1c5cae81 | 4426 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
c835a677 | 4427 | name ? name : "bond%d", NET_NAME_UNKNOWN, |
1c5cae81 | 4428 | bond_setup, tx_queues); |
dfe60397 | 4429 | if (!bond_dev) { |
a4aee5c8 | 4430 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4431 | rtnl_unlock(); |
4432 | return -ENOMEM; | |
dfe60397 MW |
4433 | } |
4434 | ||
ec87fd3b | 4435 | dev_net_set(bond_dev, net); |
88ead977 EB |
4436 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4437 | ||
dfe60397 | 4438 | res = register_netdevice(bond_dev); |
0daa2303 | 4439 | |
e826eafa PO |
4440 | netif_carrier_off(bond_dev); |
4441 | ||
7e083840 | 4442 | rtnl_unlock(); |
9e2e61fb AW |
4443 | if (res < 0) |
4444 | bond_destructor(bond_dev); | |
30c15ba9 | 4445 | return res; |
dfe60397 MW |
4446 | } |
4447 | ||
2c8c1e72 | 4448 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4449 | { |
15449745 | 4450 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4451 | |
4452 | bn->net = net; | |
4453 | INIT_LIST_HEAD(&bn->dev_list); | |
4454 | ||
ec87fd3b | 4455 | bond_create_proc_dir(bn); |
4c22400a | 4456 | bond_create_sysfs(bn); |
87a7b84b | 4457 | |
15449745 | 4458 | return 0; |
ec87fd3b EB |
4459 | } |
4460 | ||
2c8c1e72 | 4461 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4462 | { |
15449745 | 4463 | struct bond_net *bn = net_generic(net, bond_net_id); |
69b0216a | 4464 | struct bonding *bond, *tmp_bond; |
4465 | LIST_HEAD(list); | |
ec87fd3b | 4466 | |
4c22400a | 4467 | bond_destroy_sysfs(bn); |
69b0216a | 4468 | |
4469 | /* Kill off any bonds created after unregistering bond rtnl ops */ | |
4470 | rtnl_lock(); | |
4471 | list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list) | |
4472 | unregister_netdevice_queue(bond->dev, &list); | |
4473 | unregister_netdevice_many(&list); | |
4474 | rtnl_unlock(); | |
23fa5c2c VF |
4475 | |
4476 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
4477 | } |
4478 | ||
4479 | static struct pernet_operations bond_net_ops = { | |
4480 | .init = bond_net_init, | |
4481 | .exit = bond_net_exit, | |
15449745 EB |
4482 | .id = &bond_net_id, |
4483 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4484 | }; |
4485 | ||
1da177e4 LT |
4486 | static int __init bonding_init(void) |
4487 | { | |
1da177e4 LT |
4488 | int i; |
4489 | int res; | |
4490 | ||
bd33acc3 | 4491 | pr_info("%s", bond_version); |
1da177e4 | 4492 | |
dfe60397 | 4493 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4494 | if (res) |
dfe60397 | 4495 | goto out; |
1da177e4 | 4496 | |
15449745 | 4497 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4498 | if (res) |
4499 | goto out; | |
027ea041 | 4500 | |
0a2a78c4 | 4501 | res = bond_netlink_init(); |
88ead977 | 4502 | if (res) |
6639104b | 4503 | goto err_link; |
88ead977 | 4504 | |
f073c7ca TI |
4505 | bond_create_debugfs(); |
4506 | ||
1da177e4 | 4507 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4508 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4509 | if (res) |
4510 | goto err; | |
1da177e4 LT |
4511 | } |
4512 | ||
1da177e4 | 4513 | register_netdevice_notifier(&bond_netdev_notifier); |
dfe60397 | 4514 | out: |
1da177e4 | 4515 | return res; |
88ead977 | 4516 | err: |
db298686 | 4517 | bond_destroy_debugfs(); |
0a2a78c4 | 4518 | bond_netlink_fini(); |
6639104b | 4519 | err_link: |
15449745 | 4520 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4521 | goto out; |
dfe60397 | 4522 | |
1da177e4 LT |
4523 | } |
4524 | ||
4525 | static void __exit bonding_exit(void) | |
4526 | { | |
4527 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
4528 | ||
f073c7ca | 4529 | bond_destroy_debugfs(); |
ae68c398 | 4530 | |
0a2a78c4 | 4531 | bond_netlink_fini(); |
ffcdedb6 | 4532 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4533 | |
4534 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4535 | /* |
4536 | * Make sure we don't have an imbalance on our netpoll blocking | |
4537 | */ | |
4538 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4539 | #endif |
1da177e4 LT |
4540 | } |
4541 | ||
4542 | module_init(bonding_init); | |
4543 | module_exit(bonding_exit); | |
4544 | MODULE_LICENSE("GPL"); | |
4545 | MODULE_VERSION(DRV_VERSION); | |
4546 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4547 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); |