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Commit | Line | Data |
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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 | ||
a4aee5c8 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
3d632c3f | 56 | #include <linux/io.h> |
1da177e4 | 57 | #include <asm/dma.h> |
3d632c3f | 58 | #include <linux/uaccess.h> |
1da177e4 LT |
59 | #include <linux/errno.h> |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/inetdevice.h> | |
a816c7c7 | 62 | #include <linux/igmp.h> |
1da177e4 LT |
63 | #include <linux/etherdevice.h> |
64 | #include <linux/skbuff.h> | |
65 | #include <net/sock.h> | |
66 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
67 | #include <linux/smp.h> |
68 | #include <linux/if_ether.h> | |
69 | #include <net/arp.h> | |
70 | #include <linux/mii.h> | |
71 | #include <linux/ethtool.h> | |
72 | #include <linux/if_vlan.h> | |
73 | #include <linux/if_bonding.h> | |
b63bb739 | 74 | #include <linux/jiffies.h> |
e843fa50 | 75 | #include <linux/preempt.h> |
c3ade5ca | 76 | #include <net/route.h> |
457c4cbc | 77 | #include <net/net_namespace.h> |
ec87fd3b | 78 | #include <net/netns/generic.h> |
5ee31c68 | 79 | #include <net/pkt_sched.h> |
278b2083 | 80 | #include <linux/rculist.h> |
32819dc1 | 81 | #include <net/flow_keys.h> |
73958329 | 82 | #include <linux/reciprocal_div.h> |
1da177e4 LT |
83 | #include "bonding.h" |
84 | #include "bond_3ad.h" | |
85 | #include "bond_alb.h" | |
86 | ||
87 | /*---------------------------- Module parameters ----------------------------*/ | |
88 | ||
89 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
90 | #define BOND_LINK_MON_INTERV 0 | |
91 | #define BOND_LINK_ARP_INTERV 0 | |
92 | ||
93 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 94 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 95 | static int num_peer_notif = 1; |
1da177e4 | 96 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
97 | static int updelay; |
98 | static int downdelay; | |
1da177e4 | 99 | static int use_carrier = 1; |
3d632c3f SH |
100 | static char *mode; |
101 | static char *primary; | |
a549952a | 102 | static char *primary_reselect; |
3d632c3f | 103 | static char *lacp_rate; |
655f8919 | 104 | static int min_links; |
3d632c3f SH |
105 | static char *ad_select; |
106 | static char *xmit_hash_policy; | |
1da177e4 | 107 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
108 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
109 | static char *arp_validate; | |
8599b52e | 110 | static char *arp_all_targets; |
3d632c3f | 111 | static char *fail_over_mac; |
b07ea07b | 112 | static int all_slaves_active; |
d2991f75 | 113 | static struct bond_params bonding_defaults; |
c2952c31 | 114 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
73958329 | 115 | static int packets_per_slave = 1; |
1da177e4 LT |
116 | |
117 | module_param(max_bonds, int, 0); | |
118 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
119 | module_param(tx_queues, int, 0); |
120 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 | 121 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
90e62474 AG |
122 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
123 | "failover event (alias of num_unsol_na)"); | |
ad246c99 | 124 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
90e62474 AG |
125 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
126 | "failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
127 | module_param(miimon, int, 0); |
128 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
129 | module_param(updelay, int, 0); | |
130 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
131 | module_param(downdelay, int, 0); | |
2ac47660 MW |
132 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
133 | "in milliseconds"); | |
1da177e4 | 134 | module_param(use_carrier, int, 0); |
2ac47660 MW |
135 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
136 | "0 for off, 1 for on (default)"); | |
1da177e4 | 137 | module_param(mode, charp, 0); |
90e62474 | 138 | MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
2ac47660 MW |
139 | "1 for active-backup, 2 for balance-xor, " |
140 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
141 | "6 for balance-alb"); | |
1da177e4 LT |
142 | module_param(primary, charp, 0); |
143 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
144 | module_param(primary_reselect, charp, 0); |
145 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
146 | "once it comes up; " | |
147 | "0 for always (default), " | |
148 | "1 for only if speed of primary is " | |
149 | "better, " | |
150 | "2 for only on active slave " | |
151 | "failure"); | |
1da177e4 | 152 | module_param(lacp_rate, charp, 0); |
90e62474 AG |
153 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
154 | "0 for slow, 1 for fast"); | |
fd989c83 | 155 | module_param(ad_select, charp, 0); |
90e62474 AG |
156 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; " |
157 | "0 for stable (default), 1 for bandwidth, " | |
158 | "2 for count"); | |
655f8919 | 159 | module_param(min_links, int, 0); |
160 | MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); | |
161 | ||
169a3e66 | 162 | module_param(xmit_hash_policy, charp, 0); |
90e62474 AG |
163 | MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; " |
164 | "0 for layer 2 (default), 1 for layer 3+4, " | |
32819dc1 NA |
165 | "2 for layer 2+3, 3 for encap layer 2+3, " |
166 | "4 for encap layer 3+4"); | |
1da177e4 LT |
167 | module_param(arp_interval, int, 0); |
168 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
169 | module_param_array(arp_ip_target, charp, NULL, 0); | |
170 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 | 171 | module_param(arp_validate, charp, 0); |
90e62474 AG |
172 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
173 | "0 for none (default), 1 for active, " | |
174 | "2 for backup, 3 for all"); | |
8599b52e VF |
175 | module_param(arp_all_targets, charp, 0); |
176 | MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all"); | |
3915c1e8 | 177 | module_param(fail_over_mac, charp, 0); |
90e62474 AG |
178 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
179 | "the same MAC; 0 for none (default), " | |
180 | "1 for active, 2 for follow"); | |
ebd8e497 AG |
181 | module_param(all_slaves_active, int, 0); |
182 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
90e62474 | 183 | "by setting active flag for all slaves; " |
ebd8e497 | 184 | "0 for never (default), 1 for always."); |
c2952c31 | 185 | module_param(resend_igmp, int, 0); |
90e62474 AG |
186 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
187 | "link failure"); | |
73958329 NA |
188 | module_param(packets_per_slave, int, 0); |
189 | MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr " | |
190 | "mode; 0 for a random slave, 1 packet per " | |
191 | "slave (default), >1 packets per slave."); | |
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 | |
e97fd7c6 | 207 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
208 | { "slow", AD_LACP_SLOW}, |
209 | { "fast", AD_LACP_FAST}, | |
210 | { NULL, -1}, | |
211 | }; | |
212 | ||
e97fd7c6 | 213 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
214 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
215 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
216 | { "balance-xor", BOND_MODE_XOR}, | |
217 | { "broadcast", BOND_MODE_BROADCAST}, | |
218 | { "802.3ad", BOND_MODE_8023AD}, | |
219 | { "balance-tlb", BOND_MODE_TLB}, | |
220 | { "balance-alb", BOND_MODE_ALB}, | |
221 | { NULL, -1}, | |
222 | }; | |
223 | ||
e97fd7c6 | 224 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
225 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
226 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 227 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
32819dc1 NA |
228 | { "encap2+3", BOND_XMIT_POLICY_ENCAP23}, |
229 | { "encap3+4", BOND_XMIT_POLICY_ENCAP34}, | |
169a3e66 JV |
230 | { NULL, -1}, |
231 | }; | |
232 | ||
8599b52e VF |
233 | const struct bond_parm_tbl arp_all_targets_tbl[] = { |
234 | { "any", BOND_ARP_TARGETS_ANY}, | |
235 | { "all", BOND_ARP_TARGETS_ALL}, | |
236 | { NULL, -1}, | |
237 | }; | |
238 | ||
e97fd7c6 | 239 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
240 | { "none", BOND_ARP_VALIDATE_NONE}, |
241 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
242 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
243 | { "all", BOND_ARP_VALIDATE_ALL}, | |
244 | { NULL, -1}, | |
245 | }; | |
246 | ||
e97fd7c6 | 247 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
248 | { "none", BOND_FOM_NONE}, |
249 | { "active", BOND_FOM_ACTIVE}, | |
250 | { "follow", BOND_FOM_FOLLOW}, | |
251 | { NULL, -1}, | |
252 | }; | |
253 | ||
a549952a JP |
254 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
255 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
256 | { "better", BOND_PRI_RESELECT_BETTER}, | |
257 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
258 | { NULL, -1}, | |
259 | }; | |
260 | ||
fd989c83 JV |
261 | struct bond_parm_tbl ad_select_tbl[] = { |
262 | { "stable", BOND_AD_STABLE}, | |
263 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
264 | { "count", BOND_AD_COUNT}, | |
265 | { NULL, -1}, | |
266 | }; | |
267 | ||
1da177e4 LT |
268 | /*-------------------------- Forward declarations ---------------------------*/ |
269 | ||
181470fc | 270 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 271 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
272 | |
273 | /*---------------------------- General routines -----------------------------*/ | |
274 | ||
bd33acc3 | 275 | const char *bond_mode_name(int mode) |
1da177e4 | 276 | { |
77afc92b HE |
277 | static const char *names[] = { |
278 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
279 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
280 | [BOND_MODE_XOR] = "load balancing (xor)", | |
281 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 282 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
283 | [BOND_MODE_TLB] = "transmit load balancing", |
284 | [BOND_MODE_ALB] = "adaptive load balancing", | |
285 | }; | |
286 | ||
f5280948 | 287 | if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB) |
1da177e4 | 288 | return "unknown"; |
77afc92b HE |
289 | |
290 | return names[mode]; | |
1da177e4 LT |
291 | } |
292 | ||
293 | /*---------------------------------- VLAN -----------------------------------*/ | |
294 | ||
1da177e4 LT |
295 | /** |
296 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 297 | * |
1da177e4 LT |
298 | * @bond: bond device that got this skb for tx. |
299 | * @skb: hw accel VLAN tagged skb to transmit | |
300 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 301 | */ |
3d632c3f SH |
302 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
303 | struct net_device *slave_dev) | |
1da177e4 | 304 | { |
8387451e | 305 | skb->dev = slave_dev; |
374eeb5a | 306 | |
5ee31c68 | 307 | BUILD_BUG_ON(sizeof(skb->queue_mapping) != |
df4ab5b3 JP |
308 | sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); |
309 | skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping; | |
374eeb5a | 310 | |
e15c3c22 | 311 | if (unlikely(netpoll_tx_running(bond->dev))) |
8a8efa22 | 312 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 313 | else |
f6dc31a8 | 314 | dev_queue_xmit(skb); |
1da177e4 LT |
315 | |
316 | return 0; | |
317 | } | |
318 | ||
319 | /* | |
cc0e4070 JP |
320 | * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, |
321 | * We don't protect the slave list iteration with a lock because: | |
1da177e4 LT |
322 | * a. This operation is performed in IOCTL context, |
323 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
324 | * c. Holding a lock with BH disabled while directly calling a base driver | |
325 | * entry point is generally a BAD idea. | |
3d632c3f | 326 | * |
1da177e4 LT |
327 | * The design of synchronization/protection for this operation in the 8021q |
328 | * module is good for one or more VLAN devices over a single physical device | |
329 | * and cannot be extended for a teaming solution like bonding, so there is a | |
330 | * potential race condition here where a net device from the vlan group might | |
331 | * be referenced (either by a base driver or the 8021q code) while it is being | |
332 | * removed from the system. However, it turns out we're not making matters | |
333 | * worse, and if it works for regular VLAN usage it will work here too. | |
334 | */ | |
335 | ||
1da177e4 LT |
336 | /** |
337 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
338 | * @bond_dev: bonding net device that got called | |
339 | * @vid: vlan id being added | |
340 | */ | |
80d5c368 PM |
341 | static int bond_vlan_rx_add_vid(struct net_device *bond_dev, |
342 | __be16 proto, u16 vid) | |
1da177e4 | 343 | { |
454d7c9b | 344 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 345 | struct slave *slave, *rollback_slave; |
9caff1e7 | 346 | struct list_head *iter; |
dec1e90e | 347 | int res; |
1da177e4 | 348 | |
9caff1e7 | 349 | bond_for_each_slave(bond, slave, iter) { |
80d5c368 | 350 | res = vlan_vid_add(slave->dev, proto, vid); |
87002b03 JP |
351 | if (res) |
352 | goto unwind; | |
1da177e4 LT |
353 | } |
354 | ||
8e586137 | 355 | return 0; |
87002b03 JP |
356 | |
357 | unwind: | |
81f23b13 | 358 | /* unwind to the slave that failed */ |
9caff1e7 | 359 | bond_for_each_slave(bond, rollback_slave, iter) { |
81f23b13 VF |
360 | if (rollback_slave == slave) |
361 | break; | |
362 | ||
363 | vlan_vid_del(rollback_slave->dev, proto, vid); | |
364 | } | |
87002b03 JP |
365 | |
366 | return res; | |
1da177e4 LT |
367 | } |
368 | ||
369 | /** | |
370 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
371 | * @bond_dev: bonding net device that got called | |
372 | * @vid: vlan id being removed | |
373 | */ | |
80d5c368 PM |
374 | static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, |
375 | __be16 proto, u16 vid) | |
1da177e4 | 376 | { |
454d7c9b | 377 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 378 | struct list_head *iter; |
1da177e4 | 379 | struct slave *slave; |
1da177e4 | 380 | |
9caff1e7 | 381 | bond_for_each_slave(bond, slave, iter) |
80d5c368 | 382 | vlan_vid_del(slave->dev, proto, vid); |
1da177e4 | 383 | |
e868b0c9 VF |
384 | if (bond_is_lb(bond)) |
385 | bond_alb_clear_vlan(bond, vid); | |
8e586137 JP |
386 | |
387 | return 0; | |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 LT |
390 | /*------------------------------- Link status -------------------------------*/ |
391 | ||
ff59c456 JV |
392 | /* |
393 | * Set the carrier state for the master according to the state of its | |
394 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
395 | * do special 802.3ad magic. | |
396 | * | |
397 | * Returns zero if carrier state does not change, nonzero if it does. | |
398 | */ | |
399 | static int bond_set_carrier(struct bonding *bond) | |
400 | { | |
9caff1e7 | 401 | struct list_head *iter; |
ff59c456 | 402 | struct slave *slave; |
ff59c456 | 403 | |
0965a1f3 | 404 | if (!bond_has_slaves(bond)) |
ff59c456 JV |
405 | goto down; |
406 | ||
407 | if (bond->params.mode == BOND_MODE_8023AD) | |
408 | return bond_3ad_set_carrier(bond); | |
409 | ||
9caff1e7 | 410 | bond_for_each_slave(bond, slave, iter) { |
ff59c456 JV |
411 | if (slave->link == BOND_LINK_UP) { |
412 | if (!netif_carrier_ok(bond->dev)) { | |
413 | netif_carrier_on(bond->dev); | |
414 | return 1; | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | } | |
419 | ||
420 | down: | |
421 | if (netif_carrier_ok(bond->dev)) { | |
422 | netif_carrier_off(bond->dev); | |
423 | return 1; | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | ||
1da177e4 LT |
428 | /* |
429 | * Get link speed and duplex from the slave's base driver | |
430 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 431 | * values are invalid, set speed and duplex to -1, |
13b95fb7 | 432 | * and return. |
1da177e4 | 433 | */ |
13b95fb7 | 434 | static void bond_update_speed_duplex(struct slave *slave) |
1da177e4 LT |
435 | { |
436 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 437 | struct ethtool_cmd ecmd; |
5d30530e | 438 | u32 slave_speed; |
61a44b9c | 439 | int res; |
1da177e4 | 440 | |
589665f5 DC |
441 | slave->speed = SPEED_UNKNOWN; |
442 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 443 | |
4bc71cb9 | 444 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 445 | if (res < 0) |
13b95fb7 | 446 | return; |
1da177e4 | 447 | |
4bc71cb9 | 448 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 449 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
13b95fb7 | 450 | return; |
1da177e4 | 451 | |
4bc71cb9 | 452 | switch (ecmd.duplex) { |
1da177e4 LT |
453 | case DUPLEX_FULL: |
454 | case DUPLEX_HALF: | |
455 | break; | |
456 | default: | |
13b95fb7 | 457 | return; |
1da177e4 LT |
458 | } |
459 | ||
5d30530e | 460 | slave->speed = slave_speed; |
4bc71cb9 | 461 | slave->duplex = ecmd.duplex; |
1da177e4 | 462 | |
13b95fb7 | 463 | return; |
1da177e4 LT |
464 | } |
465 | ||
466 | /* | |
467 | * if <dev> supports MII link status reporting, check its link status. | |
468 | * | |
469 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 470 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
471 | * |
472 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
473 | * can't tell and just pretend it is), or 0, meaning that the link is | |
474 | * down. | |
475 | * | |
476 | * If reporting is non-zero, instead of faking link up, return -1 if | |
477 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
478 | * support them). If use_carrier is set, return whatever it says. | |
479 | * It'd be nice if there was a good way to tell if a driver supports | |
480 | * netif_carrier, but there really isn't. | |
481 | */ | |
3d632c3f SH |
482 | static int bond_check_dev_link(struct bonding *bond, |
483 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 484 | { |
eb7cc59a | 485 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 486 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
487 | struct ifreq ifr; |
488 | struct mii_ioctl_data *mii; | |
1da177e4 | 489 | |
6c988853 PG |
490 | if (!reporting && !netif_running(slave_dev)) |
491 | return 0; | |
492 | ||
eb7cc59a | 493 | if (bond->params.use_carrier) |
1da177e4 | 494 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 495 | |
29112f4e | 496 | /* Try to get link status using Ethtool first. */ |
c772dde3 BH |
497 | if (slave_dev->ethtool_ops->get_link) |
498 | return slave_dev->ethtool_ops->get_link(slave_dev) ? | |
499 | BMSR_LSTATUS : 0; | |
29112f4e | 500 | |
3d632c3f | 501 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 502 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
503 | if (ioctl) { |
504 | /* TODO: set pointer to correct ioctl on a per team member */ | |
505 | /* bases to make this more efficient. that is, once */ | |
506 | /* we determine the correct ioctl, we will always */ | |
507 | /* call it and not the others for that team */ | |
508 | /* member. */ | |
509 | ||
510 | /* | |
511 | * We cannot assume that SIOCGMIIPHY will also read a | |
512 | * register; not all network drivers (e.g., e100) | |
513 | * support that. | |
514 | */ | |
515 | ||
516 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
517 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
518 | mii = if_mii(&ifr); | |
519 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
520 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
521 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
522 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
523 | } |
524 | } | |
525 | ||
1da177e4 LT |
526 | /* |
527 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 528 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
529 | * cannot report link status). If not reporting, pretend |
530 | * we're ok. | |
531 | */ | |
3d632c3f | 532 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
533 | } |
534 | ||
535 | /*----------------------------- Multicast list ------------------------------*/ | |
536 | ||
1da177e4 LT |
537 | /* |
538 | * Push the promiscuity flag down to appropriate slaves | |
539 | */ | |
7e1a1ac1 | 540 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 541 | { |
9caff1e7 | 542 | struct list_head *iter; |
7e1a1ac1 | 543 | int err = 0; |
9caff1e7 | 544 | |
1da177e4 LT |
545 | if (USES_PRIMARY(bond->params.mode)) { |
546 | /* write lock already acquired */ | |
547 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
548 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
549 | inc); | |
1da177e4 LT |
550 | } |
551 | } else { | |
552 | struct slave *slave; | |
dec1e90e | 553 | |
9caff1e7 | 554 | bond_for_each_slave(bond, slave, iter) { |
7e1a1ac1 WC |
555 | err = dev_set_promiscuity(slave->dev, inc); |
556 | if (err) | |
557 | return err; | |
1da177e4 LT |
558 | } |
559 | } | |
7e1a1ac1 | 560 | return err; |
1da177e4 LT |
561 | } |
562 | ||
563 | /* | |
564 | * Push the allmulti flag down to all slaves | |
565 | */ | |
7e1a1ac1 | 566 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 567 | { |
9caff1e7 | 568 | struct list_head *iter; |
7e1a1ac1 | 569 | int err = 0; |
9caff1e7 | 570 | |
1da177e4 LT |
571 | if (USES_PRIMARY(bond->params.mode)) { |
572 | /* write lock already acquired */ | |
573 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
574 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
575 | inc); | |
1da177e4 LT |
576 | } |
577 | } else { | |
578 | struct slave *slave; | |
dec1e90e | 579 | |
9caff1e7 | 580 | bond_for_each_slave(bond, slave, iter) { |
7e1a1ac1 WC |
581 | err = dev_set_allmulti(slave->dev, inc); |
582 | if (err) | |
583 | return err; | |
1da177e4 LT |
584 | } |
585 | } | |
7e1a1ac1 | 586 | return err; |
1da177e4 LT |
587 | } |
588 | ||
5a37e8ca FL |
589 | /* |
590 | * Retrieve the list of registered multicast addresses for the bonding | |
591 | * device and retransmit an IGMP JOIN request to the current active | |
592 | * slave. | |
593 | */ | |
594 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
595 | { | |
4aa5dee4 | 596 | if (!rtnl_trylock()) { |
4beac029 | 597 | queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
4aa5dee4 | 598 | return; |
5a37e8ca | 599 | } |
4aa5dee4 JP |
600 | call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev); |
601 | rtnl_unlock(); | |
5a37e8ca | 602 | |
4f5474e7 NA |
603 | /* We use curr_slave_lock to protect against concurrent access to |
604 | * igmp_retrans from multiple running instances of this function and | |
605 | * bond_change_active_slave | |
606 | */ | |
607 | write_lock_bh(&bond->curr_slave_lock); | |
608 | if (bond->igmp_retrans > 1) { | |
609 | bond->igmp_retrans--; | |
c2952c31 | 610 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
4f5474e7 NA |
611 | } |
612 | write_unlock_bh(&bond->curr_slave_lock); | |
5a37e8ca FL |
613 | } |
614 | ||
379b7383 | 615 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
616 | { |
617 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 618 | mcast_work.work); |
ad999eee | 619 | |
5a37e8ca FL |
620 | bond_resend_igmp_join_requests(bond); |
621 | } | |
622 | ||
303d1cbf | 623 | /* Flush bond's hardware addresses from slave |
1da177e4 | 624 | */ |
303d1cbf | 625 | static void bond_hw_addr_flush(struct net_device *bond_dev, |
3d632c3f | 626 | struct net_device *slave_dev) |
1da177e4 | 627 | { |
454d7c9b | 628 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 629 | |
303d1cbf JV |
630 | dev_uc_unsync(slave_dev, bond_dev); |
631 | dev_mc_unsync(slave_dev, bond_dev); | |
1da177e4 LT |
632 | |
633 | if (bond->params.mode == BOND_MODE_8023AD) { | |
634 | /* del lacpdu mc addr from mc list */ | |
635 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
636 | ||
22bedad3 | 637 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
638 | } |
639 | } | |
640 | ||
641 | /*--------------------------- Active slave change ---------------------------*/ | |
642 | ||
303d1cbf JV |
643 | /* Update the hardware address list and promisc/allmulti for the new and |
644 | * old active slaves (if any). Modes that are !USES_PRIMARY keep all | |
645 | * slaves up date at all times; only the USES_PRIMARY modes need to call | |
646 | * this function to swap these settings during a failover. | |
1da177e4 | 647 | */ |
303d1cbf JV |
648 | static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active, |
649 | struct slave *old_active) | |
1da177e4 | 650 | { |
7864a1ad VF |
651 | ASSERT_RTNL(); |
652 | ||
1da177e4 | 653 | if (old_active) { |
3d632c3f | 654 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 655 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 656 | |
3d632c3f | 657 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 658 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 659 | |
303d1cbf | 660 | bond_hw_addr_flush(bond->dev, old_active->dev); |
1da177e4 LT |
661 | } |
662 | ||
663 | if (new_active) { | |
7e1a1ac1 | 664 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 665 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 666 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 667 | |
3d632c3f | 668 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 669 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 670 | |
d632ce98 | 671 | netif_addr_lock_bh(bond->dev); |
303d1cbf JV |
672 | dev_uc_sync(new_active->dev, bond->dev); |
673 | dev_mc_sync(new_active->dev, bond->dev); | |
d632ce98 | 674 | netif_addr_unlock_bh(bond->dev); |
1da177e4 LT |
675 | } |
676 | } | |
677 | ||
ae0d6750 | 678 | /** |
679 | * bond_set_dev_addr - clone slave's address to bond | |
680 | * @bond_dev: bond net device | |
681 | * @slave_dev: slave net device | |
682 | * | |
683 | * Should be called with RTNL held. | |
684 | */ | |
685 | static void bond_set_dev_addr(struct net_device *bond_dev, | |
686 | struct net_device *slave_dev) | |
687 | { | |
008aebde NA |
688 | pr_debug("bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n", |
689 | bond_dev, slave_dev, slave_dev->addr_len); | |
ae0d6750 | 690 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
691 | bond_dev->addr_assign_type = NET_ADDR_STOLEN; | |
692 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev); | |
693 | } | |
694 | ||
3915c1e8 JV |
695 | /* |
696 | * bond_do_fail_over_mac | |
697 | * | |
698 | * Perform special MAC address swapping for fail_over_mac settings | |
699 | * | |
b2e7aceb | 700 | * Called with RTNL, curr_slave_lock for write_bh. |
3915c1e8 JV |
701 | */ |
702 | static void bond_do_fail_over_mac(struct bonding *bond, | |
703 | struct slave *new_active, | |
704 | struct slave *old_active) | |
1f78d9f9 | 705 | __releases(&bond->curr_slave_lock) |
1f78d9f9 | 706 | __acquires(&bond->curr_slave_lock) |
3915c1e8 JV |
707 | { |
708 | u8 tmp_mac[ETH_ALEN]; | |
709 | struct sockaddr saddr; | |
710 | int rv; | |
711 | ||
712 | switch (bond->params.fail_over_mac) { | |
713 | case BOND_FOM_ACTIVE: | |
7d26bb10 | 714 | if (new_active) { |
7d26bb10 | 715 | write_unlock_bh(&bond->curr_slave_lock); |
ae0d6750 | 716 | bond_set_dev_addr(bond->dev, new_active->dev); |
7d26bb10 WP |
717 | write_lock_bh(&bond->curr_slave_lock); |
718 | } | |
3915c1e8 JV |
719 | break; |
720 | case BOND_FOM_FOLLOW: | |
721 | /* | |
722 | * if new_active && old_active, swap them | |
723 | * if just old_active, do nothing (going to no active slave) | |
724 | * if just new_active, set new_active to bond's MAC | |
725 | */ | |
726 | if (!new_active) | |
727 | return; | |
728 | ||
729 | write_unlock_bh(&bond->curr_slave_lock); | |
3915c1e8 JV |
730 | |
731 | if (old_active) { | |
732 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
733 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
734 | ETH_ALEN); | |
735 | saddr.sa_family = new_active->dev->type; | |
736 | } else { | |
737 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
738 | saddr.sa_family = bond->dev->type; | |
739 | } | |
740 | ||
741 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
742 | if (rv) { | |
a4aee5c8 | 743 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
744 | bond->dev->name, -rv, new_active->dev->name); |
745 | goto out; | |
746 | } | |
747 | ||
748 | if (!old_active) | |
749 | goto out; | |
750 | ||
751 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
752 | saddr.sa_family = old_active->dev->type; | |
753 | ||
754 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
755 | if (rv) | |
a4aee5c8 | 756 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
757 | bond->dev->name, -rv, new_active->dev->name); |
758 | out: | |
3915c1e8 JV |
759 | write_lock_bh(&bond->curr_slave_lock); |
760 | break; | |
761 | default: | |
a4aee5c8 | 762 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
763 | bond->dev->name, bond->params.fail_over_mac); |
764 | break; | |
765 | } | |
766 | ||
767 | } | |
768 | ||
a549952a JP |
769 | static bool bond_should_change_active(struct bonding *bond) |
770 | { | |
771 | struct slave *prim = bond->primary_slave; | |
772 | struct slave *curr = bond->curr_active_slave; | |
773 | ||
774 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
775 | return true; | |
776 | if (bond->force_primary) { | |
777 | bond->force_primary = false; | |
778 | return true; | |
779 | } | |
780 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
781 | (prim->speed < curr->speed || | |
782 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
783 | return false; | |
784 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
785 | return false; | |
786 | return true; | |
787 | } | |
3915c1e8 | 788 | |
1da177e4 LT |
789 | /** |
790 | * find_best_interface - select the best available slave to be the active one | |
791 | * @bond: our bonding struct | |
1da177e4 LT |
792 | */ |
793 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
794 | { | |
77140d29 VF |
795 | struct slave *slave, *bestslave = NULL; |
796 | struct list_head *iter; | |
1da177e4 | 797 | int mintime = bond->params.updelay; |
1da177e4 | 798 | |
77140d29 VF |
799 | if (bond->primary_slave && bond->primary_slave->link == BOND_LINK_UP && |
800 | bond_should_change_active(bond)) | |
801 | return bond->primary_slave; | |
1da177e4 | 802 | |
77140d29 VF |
803 | bond_for_each_slave(bond, slave, iter) { |
804 | if (slave->link == BOND_LINK_UP) | |
805 | return slave; | |
806 | if (slave->link == BOND_LINK_BACK && IS_UP(slave->dev) && | |
807 | slave->delay < mintime) { | |
808 | mintime = slave->delay; | |
809 | bestslave = slave; | |
1da177e4 LT |
810 | } |
811 | } | |
812 | ||
813 | return bestslave; | |
814 | } | |
815 | ||
ad246c99 BH |
816 | static bool bond_should_notify_peers(struct bonding *bond) |
817 | { | |
4cb4f97b | 818 | struct slave *slave; |
819 | ||
820 | rcu_read_lock(); | |
821 | slave = rcu_dereference(bond->curr_active_slave); | |
822 | rcu_read_unlock(); | |
ad246c99 BH |
823 | |
824 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
825 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
826 | ||
827 | if (!slave || !bond->send_peer_notif || | |
828 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
829 | return false; | |
830 | ||
ad246c99 BH |
831 | return true; |
832 | } | |
833 | ||
1da177e4 LT |
834 | /** |
835 | * change_active_interface - change the active slave into the specified one | |
836 | * @bond: our bonding struct | |
837 | * @new: the new slave to make the active one | |
838 | * | |
839 | * Set the new slave to the bond's settings and unset them on the old | |
840 | * curr_active_slave. | |
841 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
842 | * | |
843 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
844 | * because it is apparently the best available slave we have, even though its | |
845 | * updelay hasn't timed out yet. | |
846 | * | |
b2e7aceb | 847 | * If new_active is not NULL, caller must hold curr_slave_lock for write_bh. |
1da177e4 | 848 | */ |
a77b5325 | 849 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
850 | { |
851 | struct slave *old_active = bond->curr_active_slave; | |
852 | ||
3d632c3f | 853 | if (old_active == new_active) |
1da177e4 | 854 | return; |
1da177e4 LT |
855 | |
856 | if (new_active) { | |
b2220cad JV |
857 | new_active->jiffies = jiffies; |
858 | ||
1da177e4 LT |
859 | if (new_active->link == BOND_LINK_BACK) { |
860 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
861 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
862 | bond->dev->name, new_active->dev->name, | |
863 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
864 | } |
865 | ||
866 | new_active->delay = 0; | |
867 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 868 | |
3d632c3f | 869 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 870 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 871 | |
58402054 | 872 | if (bond_is_lb(bond)) |
1da177e4 | 873 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
874 | } else { |
875 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
876 | pr_info("%s: making interface %s the new active one.\n", |
877 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
878 | } |
879 | } | |
880 | } | |
881 | ||
3d632c3f | 882 | if (USES_PRIMARY(bond->params.mode)) |
303d1cbf | 883 | bond_hw_addr_swap(bond, new_active, old_active); |
1da177e4 | 884 | |
58402054 | 885 | if (bond_is_lb(bond)) { |
1da177e4 | 886 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
887 | if (old_active) |
888 | bond_set_slave_inactive_flags(old_active); | |
889 | if (new_active) | |
890 | bond_set_slave_active_flags(new_active); | |
1da177e4 | 891 | } else { |
278b2083 | 892 | rcu_assign_pointer(bond->curr_active_slave, new_active); |
1da177e4 | 893 | } |
c3ade5ca JV |
894 | |
895 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 896 | if (old_active) |
c3ade5ca | 897 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
898 | |
899 | if (new_active) { | |
ad246c99 BH |
900 | bool should_notify_peers = false; |
901 | ||
c3ade5ca | 902 | bond_set_slave_active_flags(new_active); |
2ab82852 | 903 | |
709f8a45 OG |
904 | if (bond->params.fail_over_mac) |
905 | bond_do_fail_over_mac(bond, new_active, | |
906 | old_active); | |
3915c1e8 | 907 | |
ad246c99 BH |
908 | if (netif_running(bond->dev)) { |
909 | bond->send_peer_notif = | |
910 | bond->params.num_peer_notif; | |
911 | should_notify_peers = | |
912 | bond_should_notify_peers(bond); | |
913 | } | |
914 | ||
01f3109d | 915 | write_unlock_bh(&bond->curr_slave_lock); |
01f3109d | 916 | |
b7bc2a5b | 917 | call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev); |
ad246c99 | 918 | if (should_notify_peers) |
b7bc2a5b AW |
919 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, |
920 | bond->dev); | |
01f3109d | 921 | |
01f3109d | 922 | write_lock_bh(&bond->curr_slave_lock); |
7893b249 | 923 | } |
c3ade5ca | 924 | } |
a2fd940f | 925 | |
5a37e8ca | 926 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
927 | * all were sent on curr_active_slave. |
928 | * resend only if bond is brought up with the affected | |
929 | * bonding modes and the retransmission is enabled */ | |
930 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
931 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
932 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 933 | bond->igmp_retrans = bond->params.resend_igmp; |
4beac029 | 934 | queue_delayed_work(bond->wq, &bond->mcast_work, 1); |
a2fd940f | 935 | } |
1da177e4 LT |
936 | } |
937 | ||
938 | /** | |
939 | * bond_select_active_slave - select a new active slave, if needed | |
940 | * @bond: our bonding struct | |
941 | * | |
3d632c3f | 942 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
943 | * - The old curr_active_slave has been released or lost its link. |
944 | * - The primary_slave has got its link back. | |
945 | * - A slave has got its link back and there's no old curr_active_slave. | |
946 | * | |
b2e7aceb | 947 | * Caller must hold curr_slave_lock for write_bh. |
1da177e4 | 948 | */ |
a77b5325 | 949 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
950 | { |
951 | struct slave *best_slave; | |
ff59c456 | 952 | int rv; |
1da177e4 LT |
953 | |
954 | best_slave = bond_find_best_slave(bond); | |
955 | if (best_slave != bond->curr_active_slave) { | |
956 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
957 | rv = bond_set_carrier(bond); |
958 | if (!rv) | |
959 | return; | |
960 | ||
961 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
962 | pr_info("%s: first active interface up!\n", |
963 | bond->dev->name); | |
ff59c456 | 964 | } else { |
a4aee5c8 JP |
965 | pr_info("%s: now running without any active interface !\n", |
966 | bond->dev->name); | |
ff59c456 | 967 | } |
1da177e4 LT |
968 | } |
969 | } | |
970 | ||
f6dc31a8 | 971 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 972 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 973 | { |
8a8efa22 AW |
974 | struct netpoll *np; |
975 | int err = 0; | |
f6dc31a8 | 976 | |
47be03a2 | 977 | np = kzalloc(sizeof(*np), GFP_ATOMIC); |
8a8efa22 AW |
978 | err = -ENOMEM; |
979 | if (!np) | |
980 | goto out; | |
981 | ||
47be03a2 | 982 | err = __netpoll_setup(np, slave->dev, GFP_ATOMIC); |
8a8efa22 AW |
983 | if (err) { |
984 | kfree(np); | |
985 | goto out; | |
f6dc31a8 | 986 | } |
8a8efa22 AW |
987 | slave->np = np; |
988 | out: | |
989 | return err; | |
990 | } | |
991 | static inline void slave_disable_netpoll(struct slave *slave) | |
992 | { | |
993 | struct netpoll *np = slave->np; | |
994 | ||
995 | if (!np) | |
996 | return; | |
997 | ||
998 | slave->np = NULL; | |
2cde6acd | 999 | __netpoll_free_async(np); |
8a8efa22 AW |
1000 | } |
1001 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1002 | { | |
1003 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1004 | return false; | |
1005 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1006 | return false; | |
1007 | return true; | |
f6dc31a8 WC |
1008 | } |
1009 | ||
1010 | static void bond_poll_controller(struct net_device *bond_dev) | |
1011 | { | |
8a8efa22 AW |
1012 | } |
1013 | ||
c4cdef9b | 1014 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
8a8efa22 | 1015 | { |
c4cdef9b | 1016 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 1017 | struct list_head *iter; |
c2355e1a | 1018 | struct slave *slave; |
c2355e1a | 1019 | |
9caff1e7 | 1020 | bond_for_each_slave(bond, slave, iter) |
8a8efa22 AW |
1021 | if (IS_UP(slave->dev)) |
1022 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1023 | } |
8a8efa22 | 1024 | |
47be03a2 | 1025 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, gfp_t gfp) |
8a8efa22 AW |
1026 | { |
1027 | struct bonding *bond = netdev_priv(dev); | |
9caff1e7 | 1028 | struct list_head *iter; |
f6dc31a8 | 1029 | struct slave *slave; |
dec1e90e | 1030 | int err = 0; |
f6dc31a8 | 1031 | |
9caff1e7 | 1032 | bond_for_each_slave(bond, slave, iter) { |
8a8efa22 AW |
1033 | err = slave_enable_netpoll(slave); |
1034 | if (err) { | |
c4cdef9b | 1035 | bond_netpoll_cleanup(dev); |
8a8efa22 | 1036 | break; |
f6dc31a8 WC |
1037 | } |
1038 | } | |
8a8efa22 | 1039 | return err; |
f6dc31a8 | 1040 | } |
8a8efa22 AW |
1041 | #else |
1042 | static inline int slave_enable_netpoll(struct slave *slave) | |
1043 | { | |
1044 | return 0; | |
1045 | } | |
1046 | static inline void slave_disable_netpoll(struct slave *slave) | |
1047 | { | |
1048 | } | |
f6dc31a8 WC |
1049 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1050 | { | |
1051 | } | |
f6dc31a8 WC |
1052 | #endif |
1053 | ||
1da177e4 LT |
1054 | /*---------------------------------- IOCTL ----------------------------------*/ |
1055 | ||
c8f44aff | 1056 | static netdev_features_t bond_fix_features(struct net_device *dev, |
9b7b165a | 1057 | netdev_features_t features) |
8531c5ff | 1058 | { |
b2a103e6 | 1059 | struct bonding *bond = netdev_priv(dev); |
9caff1e7 | 1060 | struct list_head *iter; |
c8f44aff | 1061 | netdev_features_t mask; |
9b7b165a | 1062 | struct slave *slave; |
b63365a2 | 1063 | |
0965a1f3 | 1064 | if (!bond_has_slaves(bond)) { |
b2a103e6 MM |
1065 | /* Disable adding VLANs to empty bond. But why? --mq */ |
1066 | features |= NETIF_F_VLAN_CHALLENGED; | |
9b7b165a | 1067 | return features; |
b2a103e6 | 1068 | } |
b63365a2 | 1069 | |
b2a103e6 | 1070 | mask = features; |
b63365a2 | 1071 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1072 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1073 | |
9caff1e7 | 1074 | bond_for_each_slave(bond, slave, iter) { |
b63365a2 HX |
1075 | features = netdev_increment_features(features, |
1076 | slave->dev->features, | |
b2a103e6 MM |
1077 | mask); |
1078 | } | |
b0ce3508 | 1079 | features = netdev_add_tso_features(features, mask); |
b2a103e6 | 1080 | |
b2a103e6 MM |
1081 | return features; |
1082 | } | |
1083 | ||
62f2a3a4 MM |
1084 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1085 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1086 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1087 | |
1088 | static void bond_compute_features(struct bonding *bond) | |
1089 | { | |
c4826861 | 1090 | unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE; |
c8f44aff | 1091 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
9caff1e7 VF |
1092 | struct net_device *bond_dev = bond->dev; |
1093 | struct list_head *iter; | |
1094 | struct slave *slave; | |
b2a103e6 | 1095 | unsigned short max_hard_header_len = ETH_HLEN; |
0e376bd0 SB |
1096 | unsigned int gso_max_size = GSO_MAX_SIZE; |
1097 | u16 gso_max_segs = GSO_MAX_SEGS; | |
b2a103e6 | 1098 | |
0965a1f3 | 1099 | if (!bond_has_slaves(bond)) |
b2a103e6 MM |
1100 | goto done; |
1101 | ||
9caff1e7 | 1102 | bond_for_each_slave(bond, slave, iter) { |
278339a4 | 1103 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1104 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1105 | ||
b6fe83e9 | 1106 | dst_release_flag &= slave->dev->priv_flags; |
54ef3137 JV |
1107 | if (slave->dev->hard_header_len > max_hard_header_len) |
1108 | max_hard_header_len = slave->dev->hard_header_len; | |
0e376bd0 SB |
1109 | |
1110 | gso_max_size = min(gso_max_size, slave->dev->gso_max_size); | |
1111 | gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs); | |
54ef3137 | 1112 | } |
8531c5ff | 1113 | |
b63365a2 | 1114 | done: |
b2a103e6 | 1115 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1116 | bond_dev->hard_header_len = max_hard_header_len; |
0e376bd0 SB |
1117 | bond_dev->gso_max_segs = gso_max_segs; |
1118 | netif_set_gso_max_size(bond_dev, gso_max_size); | |
8531c5ff | 1119 | |
b6fe83e9 ED |
1120 | flags = bond_dev->priv_flags & ~IFF_XMIT_DST_RELEASE; |
1121 | bond_dev->priv_flags = flags | dst_release_flag; | |
1122 | ||
b2a103e6 | 1123 | netdev_change_features(bond_dev); |
8531c5ff AK |
1124 | } |
1125 | ||
872254dd MS |
1126 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1127 | struct net_device *slave_dev) | |
1128 | { | |
00829823 | 1129 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1130 | |
1131 | bond_dev->type = slave_dev->type; | |
1132 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1133 | bond_dev->addr_len = slave_dev->addr_len; | |
1134 | ||
1135 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1136 | slave_dev->addr_len); | |
1137 | } | |
1138 | ||
5b2c4dd2 | 1139 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1140 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1141 | */ |
1142 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1143 | struct slave *slave, |
1144 | struct bonding *bond) | |
5b2c4dd2 | 1145 | { |
2d7011ca | 1146 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1147 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1148 | skb->pkt_type != PACKET_BROADCAST && |
1149 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1150 | return false; |
5b2c4dd2 JP |
1151 | return true; |
1152 | } | |
1153 | return false; | |
1154 | } | |
1155 | ||
8a4eb573 | 1156 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1157 | { |
8a4eb573 | 1158 | struct sk_buff *skb = *pskb; |
f1c1775a | 1159 | struct slave *slave; |
0bd80dad | 1160 | struct bonding *bond; |
de063b70 ED |
1161 | int (*recv_probe)(const struct sk_buff *, struct bonding *, |
1162 | struct slave *); | |
13a8e0c8 | 1163 | int ret = RX_HANDLER_ANOTHER; |
5b2c4dd2 | 1164 | |
8a4eb573 JP |
1165 | skb = skb_share_check(skb, GFP_ATOMIC); |
1166 | if (unlikely(!skb)) | |
1167 | return RX_HANDLER_CONSUMED; | |
1168 | ||
1169 | *pskb = skb; | |
5b2c4dd2 | 1170 | |
35d48903 JP |
1171 | slave = bond_slave_get_rcu(skb->dev); |
1172 | bond = slave->bond; | |
0bd80dad JP |
1173 | |
1174 | if (bond->params.arp_interval) | |
f1c1775a | 1175 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1176 | |
4d97480b MH |
1177 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1178 | if (recv_probe) { | |
de063b70 ED |
1179 | ret = recv_probe(skb, bond, slave); |
1180 | if (ret == RX_HANDLER_CONSUMED) { | |
1181 | consume_skb(skb); | |
1182 | return ret; | |
3aba891d JP |
1183 | } |
1184 | } | |
1185 | ||
0bd80dad | 1186 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1187 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1188 | } |
1189 | ||
35d48903 | 1190 | skb->dev = bond->dev; |
5b2c4dd2 | 1191 | |
0bd80dad | 1192 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1193 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1194 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1195 | |
541ac7c9 CG |
1196 | if (unlikely(skb_cow_head(skb, |
1197 | skb->data - skb_mac_header(skb)))) { | |
1198 | kfree_skb(skb); | |
8a4eb573 | 1199 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1200 | } |
35d48903 | 1201 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1202 | } |
1203 | ||
13a8e0c8 | 1204 | return ret; |
5b2c4dd2 JP |
1205 | } |
1206 | ||
471cb5a3 | 1207 | static int bond_master_upper_dev_link(struct net_device *bond_dev, |
1f718f0f VF |
1208 | struct net_device *slave_dev, |
1209 | struct slave *slave) | |
471cb5a3 JP |
1210 | { |
1211 | int err; | |
1212 | ||
1f718f0f | 1213 | err = netdev_master_upper_dev_link_private(slave_dev, bond_dev, slave); |
471cb5a3 JP |
1214 | if (err) |
1215 | return err; | |
1216 | slave_dev->flags |= IFF_SLAVE; | |
7f294054 | 1217 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL); |
471cb5a3 JP |
1218 | return 0; |
1219 | } | |
1220 | ||
1221 | static void bond_upper_dev_unlink(struct net_device *bond_dev, | |
1222 | struct net_device *slave_dev) | |
1223 | { | |
1224 | netdev_upper_dev_unlink(slave_dev, bond_dev); | |
1225 | slave_dev->flags &= ~IFF_SLAVE; | |
7f294054 | 1226 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL); |
471cb5a3 JP |
1227 | } |
1228 | ||
1da177e4 | 1229 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1230 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1231 | { |
454d7c9b | 1232 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1233 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
c8c23903 | 1234 | struct slave *new_slave = NULL, *prev_slave; |
1da177e4 LT |
1235 | struct sockaddr addr; |
1236 | int link_reporting; | |
8599b52e | 1237 | int res = 0, i; |
1da177e4 | 1238 | |
c772dde3 BH |
1239 | if (!bond->params.use_carrier && |
1240 | slave_dev->ethtool_ops->get_link == NULL && | |
1241 | slave_ops->ndo_do_ioctl == NULL) { | |
a4aee5c8 JP |
1242 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1243 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1244 | } |
1245 | ||
1da177e4 LT |
1246 | /* already enslaved */ |
1247 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1248 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1249 | return -EBUSY; |
1250 | } | |
1251 | ||
1252 | /* vlan challenged mutual exclusion */ | |
1253 | /* no need to lock since we're protected by rtnl_lock */ | |
1254 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1255 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
55462cf3 | 1256 | if (vlan_uses_dev(bond_dev)) { |
a4aee5c8 JP |
1257 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1258 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1259 | return -EPERM; |
1260 | } else { | |
a4aee5c8 JP |
1261 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1262 | bond_dev->name, slave_dev->name, | |
1263 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1264 | } |
1265 | } else { | |
5a03cdb7 | 1266 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1267 | } |
1268 | ||
217df670 JV |
1269 | /* |
1270 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1271 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1272 | * the current ifenslave will set the interface down prior to |
1273 | * enslaving it; the old ifenslave will not. | |
1274 | */ | |
1275 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1276 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1277 | slave_dev->name); |
1278 | res = -EPERM; | |
1279 | goto err_undo_flags; | |
1280 | } | |
1da177e4 | 1281 | |
872254dd MS |
1282 | /* set bonding device ether type by slave - bonding netdevices are |
1283 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1284 | * there is a need to override some of the type dependent attribs/funcs. | |
1285 | * | |
1286 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1287 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1288 | */ | |
0965a1f3 | 1289 | if (!bond_has_slaves(bond)) { |
e36b9d16 | 1290 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1291 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1292 | bond_dev->name, |
1293 | bond_dev->type, slave_dev->type); | |
75c78500 | 1294 | |
b7bc2a5b AW |
1295 | res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, |
1296 | bond_dev); | |
3ca5b404 JP |
1297 | res = notifier_to_errno(res); |
1298 | if (res) { | |
1299 | pr_err("%s: refused to change device type\n", | |
1300 | bond_dev->name); | |
1301 | res = -EBUSY; | |
1302 | goto err_undo_flags; | |
1303 | } | |
75c78500 | 1304 | |
32a806c1 | 1305 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1306 | dev_uc_flush(bond_dev); |
22bedad3 | 1307 | dev_mc_flush(bond_dev); |
32a806c1 | 1308 | |
e36b9d16 MS |
1309 | if (slave_dev->type != ARPHRD_ETHER) |
1310 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1311 | else { |
e36b9d16 | 1312 | ether_setup(bond_dev); |
550fd08c NH |
1313 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1314 | } | |
75c78500 | 1315 | |
b7bc2a5b AW |
1316 | call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, |
1317 | bond_dev); | |
e36b9d16 | 1318 | } |
872254dd | 1319 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1320 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1321 | slave_dev->name, | |
1322 | slave_dev->type, bond_dev->type); | |
1323 | res = -EINVAL; | |
1324 | goto err_undo_flags; | |
872254dd MS |
1325 | } |
1326 | ||
eb7cc59a | 1327 | if (slave_ops->ndo_set_mac_address == NULL) { |
0965a1f3 | 1328 | if (!bond_has_slaves(bond)) { |
a4aee5c8 JP |
1329 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1330 | bond_dev->name); | |
3915c1e8 JV |
1331 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1332 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1333 | pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n", |
1334 | bond_dev->name); | |
2ab82852 MS |
1335 | res = -EOPNOTSUPP; |
1336 | goto err_undo_flags; | |
1337 | } | |
1da177e4 LT |
1338 | } |
1339 | ||
8d8fc29d AW |
1340 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1341 | ||
c20811a7 JP |
1342 | /* If this is the first slave, then we need to set the master's hardware |
1343 | * address to be the same as the slave's. */ | |
0965a1f3 | 1344 | if (!bond_has_slaves(bond) && |
dec1e90e | 1345 | bond->dev->addr_assign_type == NET_ADDR_RANDOM) |
409cc1f8 | 1346 | bond_set_dev_addr(bond->dev, slave_dev); |
c20811a7 | 1347 | |
243cb4e5 | 1348 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1349 | if (!new_slave) { |
1350 | res = -ENOMEM; | |
1351 | goto err_undo_flags; | |
1352 | } | |
bb1d9123 AG |
1353 | /* |
1354 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1355 | * is set via sysfs or module option if desired. | |
1356 | */ | |
1357 | new_slave->queue_id = 0; | |
1358 | ||
b15ba0fb JP |
1359 | /* Save slave's original mtu and then set it to match the bond */ |
1360 | new_slave->original_mtu = slave_dev->mtu; | |
1361 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1362 | if (res) { | |
1363 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1364 | goto err_free; | |
1365 | } | |
1366 | ||
217df670 JV |
1367 | /* |
1368 | * Save slave's original ("permanent") mac address for modes | |
1369 | * that need it, and for restoring it upon release, and then | |
1370 | * set it to the master's address | |
1371 | */ | |
1372 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1373 | |
dd957c57 | 1374 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1375 | /* |
1376 | * Set slave to master's mac address. The application already | |
1377 | * set the master's mac address to that of the first slave | |
1378 | */ | |
1379 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1380 | addr.sa_family = slave_dev->type; | |
1381 | res = dev_set_mac_address(slave_dev, &addr); | |
1382 | if (res) { | |
5a03cdb7 | 1383 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1384 | goto err_restore_mtu; |
2ab82852 | 1385 | } |
217df670 | 1386 | } |
1da177e4 | 1387 | |
217df670 JV |
1388 | /* open the slave since the application closed it */ |
1389 | res = dev_open(slave_dev); | |
1390 | if (res) { | |
3d632c3f | 1391 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
1f718f0f | 1392 | goto err_restore_mac; |
1da177e4 LT |
1393 | } |
1394 | ||
35d48903 | 1395 | new_slave->bond = bond; |
1da177e4 | 1396 | new_slave->dev = slave_dev; |
0b680e75 | 1397 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1398 | |
58402054 | 1399 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1400 | /* bond_alb_init_slave() must be called before all other stages since |
1401 | * it might fail and we do not want to have to undo everything | |
1402 | */ | |
1403 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1404 | if (res) |
569f0c4d | 1405 | goto err_close; |
1da177e4 LT |
1406 | } |
1407 | ||
303d1cbf JV |
1408 | /* If the mode USES_PRIMARY, then the following is handled by |
1409 | * bond_change_active_slave(). | |
1da177e4 LT |
1410 | */ |
1411 | if (!USES_PRIMARY(bond->params.mode)) { | |
1412 | /* set promiscuity level to new slave */ | |
1413 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1414 | res = dev_set_promiscuity(slave_dev, 1); |
1415 | if (res) | |
1416 | goto err_close; | |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | /* set allmulti level to new slave */ | |
1420 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1421 | res = dev_set_allmulti(slave_dev, 1); |
1422 | if (res) | |
1423 | goto err_close; | |
1da177e4 LT |
1424 | } |
1425 | ||
b9e40857 | 1426 | netif_addr_lock_bh(bond_dev); |
303d1cbf JV |
1427 | |
1428 | dev_mc_sync_multiple(slave_dev, bond_dev); | |
1429 | dev_uc_sync_multiple(slave_dev, bond_dev); | |
1430 | ||
b9e40857 | 1431 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1432 | } |
1433 | ||
1434 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1435 | /* add lacpdu mc addr to mc list */ | |
1436 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1437 | ||
22bedad3 | 1438 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1439 | } |
1440 | ||
b8e2fde4 WY |
1441 | res = vlan_vids_add_by_dev(slave_dev, bond_dev); |
1442 | if (res) { | |
1ff412ad | 1443 | pr_err("%s: Error: Couldn't add bond vlan ids to %s\n", |
1444 | bond_dev->name, slave_dev->name); | |
1445 | goto err_close; | |
1446 | } | |
1da177e4 | 1447 | |
c8c23903 | 1448 | prev_slave = bond_last_slave(bond); |
1da177e4 LT |
1449 | |
1450 | new_slave->delay = 0; | |
1451 | new_slave->link_failure_count = 0; | |
1452 | ||
876254ae VF |
1453 | bond_update_speed_duplex(new_slave); |
1454 | ||
f31c7937 MK |
1455 | new_slave->last_arp_rx = jiffies - |
1456 | (msecs_to_jiffies(bond->params.arp_interval) + 1); | |
8599b52e VF |
1457 | for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) |
1458 | new_slave->target_last_arp_rx[i] = new_slave->last_arp_rx; | |
f5b2b966 | 1459 | |
1da177e4 LT |
1460 | if (bond->params.miimon && !bond->params.use_carrier) { |
1461 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1462 | ||
1463 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1464 | /* | |
1465 | * miimon is set but a bonded network driver | |
1466 | * does not support ETHTOOL/MII and | |
1467 | * arp_interval is not set. Note: if | |
1468 | * use_carrier is enabled, we will never go | |
1469 | * here (because netif_carrier is always | |
1470 | * supported); thus, we don't need to change | |
1471 | * the messages for netif_carrier. | |
1472 | */ | |
a4aee5c8 | 1473 | pr_warning("%s: Warning: 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", |
4e0952c7 | 1474 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1475 | } else if (link_reporting == -1) { |
1476 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1477 | pr_warning("%s: Warning: 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", |
1478 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1479 | } |
1480 | } | |
1481 | ||
1482 | /* check for initial state */ | |
f31c7937 MK |
1483 | if (bond->params.miimon) { |
1484 | if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) { | |
1485 | if (bond->params.updelay) { | |
1486 | new_slave->link = BOND_LINK_BACK; | |
1487 | new_slave->delay = bond->params.updelay; | |
1488 | } else { | |
1489 | new_slave->link = BOND_LINK_UP; | |
1490 | } | |
1da177e4 | 1491 | } else { |
f31c7937 | 1492 | new_slave->link = BOND_LINK_DOWN; |
1da177e4 | 1493 | } |
f31c7937 MK |
1494 | } else if (bond->params.arp_interval) { |
1495 | new_slave->link = (netif_carrier_ok(slave_dev) ? | |
1496 | BOND_LINK_UP : BOND_LINK_DOWN); | |
1da177e4 | 1497 | } else { |
f31c7937 | 1498 | new_slave->link = BOND_LINK_UP; |
1da177e4 LT |
1499 | } |
1500 | ||
f31c7937 MK |
1501 | if (new_slave->link != BOND_LINK_DOWN) |
1502 | new_slave->jiffies = jiffies; | |
1503 | pr_debug("Initial state of slave_dev is BOND_LINK_%s\n", | |
1504 | new_slave->link == BOND_LINK_DOWN ? "DOWN" : | |
1505 | (new_slave->link == BOND_LINK_UP ? "UP" : "BACK")); | |
1506 | ||
1da177e4 LT |
1507 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { |
1508 | /* if there is a primary slave, remember it */ | |
a549952a | 1509 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1510 | bond->primary_slave = new_slave; |
a549952a JP |
1511 | bond->force_primary = true; |
1512 | } | |
1da177e4 LT |
1513 | } |
1514 | ||
1515 | switch (bond->params.mode) { | |
1516 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b | 1517 | bond_set_slave_inactive_flags(new_slave); |
1da177e4 LT |
1518 | break; |
1519 | case BOND_MODE_8023AD: | |
1520 | /* in 802.3ad mode, the internal mechanism | |
1521 | * will activate the slaves in the selected | |
1522 | * aggregator | |
1523 | */ | |
1524 | bond_set_slave_inactive_flags(new_slave); | |
1525 | /* if this is the first slave */ | |
23c147e0 | 1526 | if (!prev_slave) { |
1da177e4 LT |
1527 | SLAVE_AD_INFO(new_slave).id = 1; |
1528 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1529 | * can be called only after the mac address of the bond is set | |
1530 | */ | |
56d00c67 | 1531 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1532 | } else { |
1533 | SLAVE_AD_INFO(new_slave).id = | |
dec1e90e | 1534 | SLAVE_AD_INFO(prev_slave).id + 1; |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | bond_3ad_bind_slave(new_slave); | |
1538 | break; | |
1539 | case BOND_MODE_TLB: | |
1540 | case BOND_MODE_ALB: | |
e30bc066 | 1541 | bond_set_active_slave(new_slave); |
059fe7a5 | 1542 | bond_set_slave_inactive_flags(new_slave); |
1da177e4 LT |
1543 | break; |
1544 | default: | |
5a03cdb7 | 1545 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1546 | |
1547 | /* always active in trunk mode */ | |
e30bc066 | 1548 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1549 | |
1550 | /* In trunking mode there is little meaning to curr_active_slave | |
1551 | * anyway (it holds no special properties of the bond device), | |
1552 | * so we can change it without calling change_active_interface() | |
1553 | */ | |
4e591b93 | 1554 | if (!bond->curr_active_slave && new_slave->link == BOND_LINK_UP) |
278b2083 | 1555 | rcu_assign_pointer(bond->curr_active_slave, new_slave); |
3d632c3f | 1556 | |
1da177e4 LT |
1557 | break; |
1558 | } /* switch(bond_mode) */ | |
1559 | ||
f6dc31a8 | 1560 | #ifdef CONFIG_NET_POLL_CONTROLLER |
10eccb46 | 1561 | slave_dev->npinfo = bond->dev->npinfo; |
8a8efa22 AW |
1562 | if (slave_dev->npinfo) { |
1563 | if (slave_enable_netpoll(new_slave)) { | |
1564 | read_unlock(&bond->lock); | |
1565 | pr_info("Error, %s: master_dev is using netpoll, " | |
1566 | "but new slave device does not support netpoll.\n", | |
1567 | bond_dev->name); | |
1568 | res = -EBUSY; | |
f7d9821a | 1569 | goto err_detach; |
8a8efa22 | 1570 | } |
f6dc31a8 WC |
1571 | } |
1572 | #endif | |
8a8efa22 | 1573 | |
35d48903 JP |
1574 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1575 | new_slave); | |
1576 | if (res) { | |
1577 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
5831d66e | 1578 | goto err_detach; |
35d48903 JP |
1579 | } |
1580 | ||
1f718f0f VF |
1581 | res = bond_master_upper_dev_link(bond_dev, slave_dev, new_slave); |
1582 | if (res) { | |
1583 | pr_debug("Error %d calling bond_master_upper_dev_link\n", res); | |
1584 | goto err_unregister; | |
1585 | } | |
1586 | ||
5378c2e6 VF |
1587 | bond->slave_cnt++; |
1588 | bond_compute_features(bond); | |
1589 | bond_set_carrier(bond); | |
1590 | ||
1591 | if (USES_PRIMARY(bond->params.mode)) { | |
1592 | read_lock(&bond->lock); | |
1593 | write_lock_bh(&bond->curr_slave_lock); | |
1594 | bond_select_active_slave(bond); | |
1595 | write_unlock_bh(&bond->curr_slave_lock); | |
1596 | read_unlock(&bond->lock); | |
1597 | } | |
1f718f0f | 1598 | |
a4aee5c8 JP |
1599 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1600 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1601 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1602 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1603 | |
1604 | /* enslave is successful */ | |
1605 | return 0; | |
1606 | ||
1607 | /* Undo stages on error */ | |
1f718f0f VF |
1608 | err_unregister: |
1609 | netdev_rx_handler_unregister(slave_dev); | |
1610 | ||
f7d9821a | 1611 | err_detach: |
303d1cbf JV |
1612 | if (!USES_PRIMARY(bond->params.mode)) |
1613 | bond_hw_addr_flush(bond_dev, slave_dev); | |
1614 | ||
1ff412ad | 1615 | vlan_vids_del_by_dev(slave_dev, bond_dev); |
f7d9821a | 1616 | write_lock_bh(&bond->lock); |
3c5913b5 | 1617 | if (bond->primary_slave == new_slave) |
1618 | bond->primary_slave = NULL; | |
3c5913b5 | 1619 | if (bond->curr_active_slave == new_slave) { |
c6cdcf6d | 1620 | bond_change_active_slave(bond, NULL); |
1621 | write_unlock_bh(&bond->lock); | |
3c5913b5 | 1622 | read_lock(&bond->lock); |
1623 | write_lock_bh(&bond->curr_slave_lock); | |
3c5913b5 | 1624 | bond_select_active_slave(bond); |
1625 | write_unlock_bh(&bond->curr_slave_lock); | |
1626 | read_unlock(&bond->lock); | |
c6cdcf6d | 1627 | } else { |
1628 | write_unlock_bh(&bond->lock); | |
3c5913b5 | 1629 | } |
fc7a72ac | 1630 | slave_disable_netpoll(new_slave); |
f7d9821a | 1631 | |
1da177e4 | 1632 | err_close: |
b6a5a7b9 | 1633 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
1634 | dev_close(slave_dev); |
1635 | ||
1636 | err_restore_mac: | |
dd957c57 | 1637 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1638 | /* XXX TODO - fom follow mode needs to change master's |
1639 | * MAC if this slave's MAC is in use by the bond, or at | |
1640 | * least print a warning. | |
1641 | */ | |
2ab82852 MS |
1642 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1643 | addr.sa_family = slave_dev->type; | |
1644 | dev_set_mac_address(slave_dev, &addr); | |
1645 | } | |
1da177e4 | 1646 | |
b15ba0fb JP |
1647 | err_restore_mtu: |
1648 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1649 | ||
1da177e4 LT |
1650 | err_free: |
1651 | kfree(new_slave); | |
1652 | ||
1653 | err_undo_flags: | |
b8fad459 | 1654 | /* Enslave of first slave has failed and we need to fix master's mac */ |
0965a1f3 | 1655 | if (!bond_has_slaves(bond) && |
b8fad459 NA |
1656 | ether_addr_equal(bond_dev->dev_addr, slave_dev->dev_addr)) |
1657 | eth_hw_addr_random(bond_dev); | |
3d632c3f | 1658 | |
1da177e4 LT |
1659 | return res; |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * Try to release the slave device <slave> from the bond device <master> | |
1664 | * It is legal to access curr_active_slave without a lock because all the function | |
0896341a | 1665 | * is write-locked. If "all" is true it means that the function is being called |
1666 | * while destroying a bond interface and all slaves are being released. | |
1da177e4 LT |
1667 | * |
1668 | * The rules for slave state should be: | |
1669 | * for Active/Backup: | |
1670 | * Active stays on all backups go down | |
1671 | * for Bonded connections: | |
1672 | * The first up interface should be left on and all others downed. | |
1673 | */ | |
0896341a | 1674 | static int __bond_release_one(struct net_device *bond_dev, |
1675 | struct net_device *slave_dev, | |
1676 | bool all) | |
1da177e4 | 1677 | { |
454d7c9b | 1678 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1679 | struct slave *slave, *oldcurrent; |
1680 | struct sockaddr addr; | |
5a0068de | 1681 | int old_flags = bond_dev->flags; |
c8f44aff | 1682 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1683 | |
1684 | /* slave is not a slave or master is not master of this slave */ | |
1685 | if (!(slave_dev->flags & IFF_SLAVE) || | |
471cb5a3 | 1686 | !netdev_has_upper_dev(slave_dev, bond_dev)) { |
a4aee5c8 | 1687 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1688 | bond_dev->name, slave_dev->name); |
1689 | return -EINVAL; | |
1690 | } | |
1691 | ||
e843fa50 | 1692 | block_netpoll_tx(); |
1da177e4 LT |
1693 | write_lock_bh(&bond->lock); |
1694 | ||
1695 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1696 | if (!slave) { | |
1697 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1698 | pr_info("%s: %s not enslaved\n", |
1699 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1700 | write_unlock_bh(&bond->lock); |
e843fa50 | 1701 | unblock_netpoll_tx(); |
1da177e4 LT |
1702 | return -EINVAL; |
1703 | } | |
1704 | ||
fcd99434 | 1705 | write_unlock_bh(&bond->lock); |
1f718f0f | 1706 | |
5378c2e6 VF |
1707 | /* release the slave from its bond */ |
1708 | bond->slave_cnt--; | |
1709 | ||
1f718f0f | 1710 | bond_upper_dev_unlink(bond_dev, slave_dev); |
35d48903 JP |
1711 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1712 | * for this slave anymore. | |
1713 | */ | |
1714 | netdev_rx_handler_unregister(slave_dev); | |
35d48903 JP |
1715 | write_lock_bh(&bond->lock); |
1716 | ||
1da177e4 LT |
1717 | /* Inform AD package of unbinding of slave. */ |
1718 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1719 | /* must be called before the slave is | |
1720 | * detached from the list | |
1721 | */ | |
1722 | bond_3ad_unbind_slave(slave); | |
1723 | } | |
1724 | ||
a4aee5c8 JP |
1725 | pr_info("%s: releasing %s interface %s\n", |
1726 | bond_dev->name, | |
e30bc066 | 1727 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 1728 | slave_dev->name); |
1da177e4 LT |
1729 | |
1730 | oldcurrent = bond->curr_active_slave; | |
1731 | ||
1732 | bond->current_arp_slave = NULL; | |
1733 | ||
dec1e90e | 1734 | if (!all && !bond->params.fail_over_mac) { |
1735 | if (ether_addr_equal(bond_dev->dev_addr, slave->perm_hwaddr) && | |
0965a1f3 | 1736 | bond_has_slaves(bond)) |
dec1e90e | 1737 | pr_warn("%s: Warning: 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", |
1738 | bond_dev->name, slave_dev->name, | |
1739 | slave->perm_hwaddr, | |
1740 | bond_dev->name, slave_dev->name); | |
1741 | } | |
1742 | ||
3d632c3f | 1743 | if (bond->primary_slave == slave) |
1da177e4 | 1744 | bond->primary_slave = NULL; |
1da177e4 | 1745 | |
3d632c3f | 1746 | if (oldcurrent == slave) |
1da177e4 | 1747 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1748 | |
58402054 | 1749 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1750 | /* Must be called only after the slave has been |
1751 | * detached from the list and the curr_active_slave | |
1752 | * has been cleared (if our_slave == old_current), | |
1753 | * but before a new active slave is selected. | |
1754 | */ | |
2543331d | 1755 | write_unlock_bh(&bond->lock); |
1da177e4 | 1756 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1757 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1758 | } |
1759 | ||
0896341a | 1760 | if (all) { |
278b2083 | 1761 | rcu_assign_pointer(bond->curr_active_slave, NULL); |
0896341a | 1762 | } else if (oldcurrent == slave) { |
059fe7a5 JV |
1763 | /* |
1764 | * Note that we hold RTNL over this sequence, so there | |
1765 | * is no concern that another slave add/remove event | |
1766 | * will interfere. | |
1767 | */ | |
1768 | write_unlock_bh(&bond->lock); | |
1769 | read_lock(&bond->lock); | |
1770 | write_lock_bh(&bond->curr_slave_lock); | |
1771 | ||
1da177e4 LT |
1772 | bond_select_active_slave(bond); |
1773 | ||
059fe7a5 JV |
1774 | write_unlock_bh(&bond->curr_slave_lock); |
1775 | read_unlock(&bond->lock); | |
1776 | write_lock_bh(&bond->lock); | |
1777 | } | |
1778 | ||
0965a1f3 | 1779 | if (!bond_has_slaves(bond)) { |
ff59c456 | 1780 | bond_set_carrier(bond); |
409cc1f8 | 1781 | eth_hw_addr_random(bond_dev); |
1da177e4 | 1782 | |
a59d3d21 | 1783 | if (vlan_uses_dev(bond_dev)) { |
a4aee5c8 JP |
1784 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
1785 | bond_dev->name, bond_dev->name); | |
1786 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
1787 | bond_dev->name); | |
1da177e4 | 1788 | } |
1da177e4 LT |
1789 | } |
1790 | ||
1791 | write_unlock_bh(&bond->lock); | |
e843fa50 | 1792 | unblock_netpoll_tx(); |
278b2083 | 1793 | synchronize_rcu(); |
1da177e4 | 1794 | |
0965a1f3 | 1795 | if (!bond_has_slaves(bond)) { |
2af73d4b | 1796 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); |
80028ea1 VF |
1797 | call_netdevice_notifiers(NETDEV_RELEASE, bond->dev); |
1798 | } | |
2af73d4b | 1799 | |
b2a103e6 MM |
1800 | bond_compute_features(bond); |
1801 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1802 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
1803 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
1804 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1805 | ||
b76cdba9 | 1806 | /* must do this from outside any spinlocks */ |
1ff412ad | 1807 | vlan_vids_del_by_dev(slave_dev, bond_dev); |
1da177e4 | 1808 | |
303d1cbf JV |
1809 | /* If the mode USES_PRIMARY, then this cases was handled above by |
1810 | * bond_change_active_slave(..., NULL) | |
1da177e4 LT |
1811 | */ |
1812 | if (!USES_PRIMARY(bond->params.mode)) { | |
5a0068de NH |
1813 | /* unset promiscuity level from slave |
1814 | * NOTE: The NETDEV_CHANGEADDR call above may change the value | |
1815 | * of the IFF_PROMISC flag in the bond_dev, but we need the | |
1816 | * value of that flag before that change, as that was the value | |
1817 | * when this slave was attached, so we cache at the start of the | |
1818 | * function and use it here. Same goes for ALLMULTI below | |
1819 | */ | |
1820 | if (old_flags & IFF_PROMISC) | |
1da177e4 | 1821 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1822 | |
1823 | /* unset allmulti level from slave */ | |
5a0068de | 1824 | if (old_flags & IFF_ALLMULTI) |
1da177e4 | 1825 | dev_set_allmulti(slave_dev, -1); |
1da177e4 | 1826 | |
303d1cbf | 1827 | bond_hw_addr_flush(bond_dev, slave_dev); |
1da177e4 LT |
1828 | } |
1829 | ||
8a8efa22 | 1830 | slave_disable_netpoll(slave); |
f6dc31a8 | 1831 | |
1da177e4 LT |
1832 | /* close slave before restoring its mac address */ |
1833 | dev_close(slave_dev); | |
1834 | ||
3915c1e8 | 1835 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1836 | /* restore original ("permanent") mac address */ |
1837 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1838 | addr.sa_family = slave_dev->type; | |
1839 | dev_set_mac_address(slave_dev, &addr); | |
1840 | } | |
1da177e4 | 1841 | |
b15ba0fb JP |
1842 | dev_set_mtu(slave_dev, slave->original_mtu); |
1843 | ||
2d7011ca | 1844 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
1845 | |
1846 | kfree(slave); | |
1847 | ||
1848 | return 0; /* deletion OK */ | |
1849 | } | |
1850 | ||
0896341a | 1851 | /* A wrapper used because of ndo_del_link */ |
1852 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) | |
1853 | { | |
1854 | return __bond_release_one(bond_dev, slave_dev, false); | |
1855 | } | |
1856 | ||
d90a162a | 1857 | /* |
dadaa10b | 1858 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
1859 | * Must be under rtnl_lock when this function is called. |
1860 | */ | |
26d8ee75 | 1861 | static int bond_release_and_destroy(struct net_device *bond_dev, |
1862 | struct net_device *slave_dev) | |
d90a162a | 1863 | { |
454d7c9b | 1864 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
1865 | int ret; |
1866 | ||
1867 | ret = bond_release(bond_dev, slave_dev); | |
0965a1f3 | 1868 | if (ret == 0 && !bond_has_slaves(bond)) { |
8a8efa22 | 1869 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
1870 | pr_info("%s: destroying bond %s.\n", |
1871 | bond_dev->name, bond_dev->name); | |
9e71626c | 1872 | unregister_netdevice(bond_dev); |
d90a162a MS |
1873 | } |
1874 | return ret; | |
1875 | } | |
1876 | ||
1da177e4 LT |
1877 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
1878 | { | |
454d7c9b | 1879 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1880 | |
1881 | info->bond_mode = bond->params.mode; | |
1882 | info->miimon = bond->params.miimon; | |
1883 | ||
6603a6f2 | 1884 | read_lock(&bond->lock); |
1da177e4 | 1885 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 1886 | read_unlock(&bond->lock); |
1da177e4 LT |
1887 | |
1888 | return 0; | |
1889 | } | |
1890 | ||
1891 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
1892 | { | |
454d7c9b | 1893 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 1894 | struct list_head *iter; |
dec1e90e | 1895 | int i = 0, res = -ENODEV; |
1da177e4 | 1896 | struct slave *slave; |
1da177e4 | 1897 | |
6603a6f2 | 1898 | read_lock(&bond->lock); |
9caff1e7 | 1899 | bond_for_each_slave(bond, slave, iter) { |
dec1e90e | 1900 | if (i++ == (int)info->slave_id) { |
689c96cc ED |
1901 | res = 0; |
1902 | strcpy(info->slave_name, slave->dev->name); | |
1903 | info->link = slave->link; | |
e30bc066 | 1904 | info->state = bond_slave_state(slave); |
689c96cc | 1905 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
1906 | break; |
1907 | } | |
1908 | } | |
6603a6f2 | 1909 | read_unlock(&bond->lock); |
1da177e4 | 1910 | |
689c96cc | 1911 | return res; |
1da177e4 LT |
1912 | } |
1913 | ||
1914 | /*-------------------------------- Monitoring -------------------------------*/ | |
1915 | ||
1da177e4 | 1916 | |
f0c76d61 JV |
1917 | static int bond_miimon_inspect(struct bonding *bond) |
1918 | { | |
dec1e90e | 1919 | int link_state, commit = 0; |
9caff1e7 | 1920 | struct list_head *iter; |
f0c76d61 | 1921 | struct slave *slave; |
41f89100 JP |
1922 | bool ignore_updelay; |
1923 | ||
1924 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 | 1925 | |
4cb4f97b | 1926 | bond_for_each_slave_rcu(bond, slave, iter) { |
f0c76d61 | 1927 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 1928 | |
f0c76d61 | 1929 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
1930 | |
1931 | switch (slave->link) { | |
f0c76d61 JV |
1932 | case BOND_LINK_UP: |
1933 | if (link_state) | |
1934 | continue; | |
1da177e4 | 1935 | |
f0c76d61 JV |
1936 | slave->link = BOND_LINK_FAIL; |
1937 | slave->delay = bond->params.downdelay; | |
1938 | if (slave->delay) { | |
a4aee5c8 JP |
1939 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
1940 | bond->dev->name, | |
1941 | (bond->params.mode == | |
1942 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 1943 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
1944 | "active " : "backup ") : "", |
1945 | slave->dev->name, | |
1946 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 1947 | } |
f0c76d61 JV |
1948 | /*FALLTHRU*/ |
1949 | case BOND_LINK_FAIL: | |
1950 | if (link_state) { | |
1951 | /* | |
1952 | * recovered before downdelay expired | |
1953 | */ | |
1954 | slave->link = BOND_LINK_UP; | |
1da177e4 | 1955 | slave->jiffies = jiffies; |
a4aee5c8 JP |
1956 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
1957 | bond->dev->name, | |
1958 | (bond->params.downdelay - slave->delay) * | |
1959 | bond->params.miimon, | |
1960 | slave->dev->name); | |
f0c76d61 | 1961 | continue; |
1da177e4 | 1962 | } |
f0c76d61 JV |
1963 | |
1964 | if (slave->delay <= 0) { | |
1965 | slave->new_link = BOND_LINK_DOWN; | |
1966 | commit++; | |
1967 | continue; | |
1da177e4 | 1968 | } |
1da177e4 | 1969 | |
f0c76d61 JV |
1970 | slave->delay--; |
1971 | break; | |
1972 | ||
1973 | case BOND_LINK_DOWN: | |
1974 | if (!link_state) | |
1975 | continue; | |
1976 | ||
1977 | slave->link = BOND_LINK_BACK; | |
1978 | slave->delay = bond->params.updelay; | |
1979 | ||
1980 | if (slave->delay) { | |
a4aee5c8 JP |
1981 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
1982 | bond->dev->name, slave->dev->name, | |
1983 | ignore_updelay ? 0 : | |
1984 | bond->params.updelay * | |
1985 | bond->params.miimon); | |
f0c76d61 JV |
1986 | } |
1987 | /*FALLTHRU*/ | |
1988 | case BOND_LINK_BACK: | |
1989 | if (!link_state) { | |
1990 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
1991 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
1992 | bond->dev->name, | |
1993 | (bond->params.updelay - slave->delay) * | |
1994 | bond->params.miimon, | |
1995 | slave->dev->name); | |
f0c76d61 JV |
1996 | |
1997 | continue; | |
1998 | } | |
1999 | ||
41f89100 JP |
2000 | if (ignore_updelay) |
2001 | slave->delay = 0; | |
2002 | ||
f0c76d61 JV |
2003 | if (slave->delay <= 0) { |
2004 | slave->new_link = BOND_LINK_UP; | |
2005 | commit++; | |
41f89100 | 2006 | ignore_updelay = false; |
f0c76d61 | 2007 | continue; |
1da177e4 | 2008 | } |
f0c76d61 JV |
2009 | |
2010 | slave->delay--; | |
1da177e4 | 2011 | break; |
f0c76d61 JV |
2012 | } |
2013 | } | |
1da177e4 | 2014 | |
f0c76d61 JV |
2015 | return commit; |
2016 | } | |
1da177e4 | 2017 | |
f0c76d61 JV |
2018 | static void bond_miimon_commit(struct bonding *bond) |
2019 | { | |
9caff1e7 | 2020 | struct list_head *iter; |
f0c76d61 | 2021 | struct slave *slave; |
f0c76d61 | 2022 | |
9caff1e7 | 2023 | bond_for_each_slave(bond, slave, iter) { |
f0c76d61 JV |
2024 | switch (slave->new_link) { |
2025 | case BOND_LINK_NOCHANGE: | |
2026 | continue; | |
1da177e4 | 2027 | |
f0c76d61 JV |
2028 | case BOND_LINK_UP: |
2029 | slave->link = BOND_LINK_UP; | |
2030 | slave->jiffies = jiffies; | |
2031 | ||
2032 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2033 | /* prevent it from being the active one */ | |
e30bc066 | 2034 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2035 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2036 | /* make it immediately active */ | |
e30bc066 | 2037 | bond_set_active_slave(slave); |
f0c76d61 JV |
2038 | } else if (slave != bond->primary_slave) { |
2039 | /* prevent it from being the active one */ | |
e30bc066 | 2040 | bond_set_backup_slave(slave); |
1da177e4 | 2041 | } |
1da177e4 | 2042 | |
5d30530e | 2043 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 | 2044 | bond->dev->name, slave->dev->name, |
db4e9b2b NA |
2045 | slave->speed == SPEED_UNKNOWN ? 0 : slave->speed, |
2046 | slave->duplex ? "full" : "half"); | |
1da177e4 | 2047 | |
f0c76d61 JV |
2048 | /* notify ad that the link status has changed */ |
2049 | if (bond->params.mode == BOND_MODE_8023AD) | |
2050 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2051 | |
58402054 | 2052 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2053 | bond_alb_handle_link_change(bond, slave, |
2054 | BOND_LINK_UP); | |
1da177e4 | 2055 | |
f0c76d61 JV |
2056 | if (!bond->curr_active_slave || |
2057 | (slave == bond->primary_slave)) | |
2058 | goto do_failover; | |
1da177e4 | 2059 | |
f0c76d61 | 2060 | continue; |
059fe7a5 | 2061 | |
f0c76d61 | 2062 | case BOND_LINK_DOWN: |
fba4acda JV |
2063 | if (slave->link_failure_count < UINT_MAX) |
2064 | slave->link_failure_count++; | |
2065 | ||
f0c76d61 | 2066 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2067 | |
f0c76d61 JV |
2068 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2069 | bond->params.mode == BOND_MODE_8023AD) | |
2070 | bond_set_slave_inactive_flags(slave); | |
2071 | ||
a4aee5c8 JP |
2072 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2073 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2074 | |
2075 | if (bond->params.mode == BOND_MODE_8023AD) | |
2076 | bond_3ad_handle_link_change(slave, | |
2077 | BOND_LINK_DOWN); | |
2078 | ||
ae63e808 | 2079 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2080 | bond_alb_handle_link_change(bond, slave, |
2081 | BOND_LINK_DOWN); | |
2082 | ||
2083 | if (slave == bond->curr_active_slave) | |
2084 | goto do_failover; | |
2085 | ||
2086 | continue; | |
2087 | ||
2088 | default: | |
a4aee5c8 | 2089 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2090 | bond->dev->name, slave->new_link, |
2091 | slave->dev->name); | |
2092 | slave->new_link = BOND_LINK_NOCHANGE; | |
2093 | ||
2094 | continue; | |
2095 | } | |
2096 | ||
2097 | do_failover: | |
2098 | ASSERT_RTNL(); | |
e843fa50 | 2099 | block_netpoll_tx(); |
f0c76d61 JV |
2100 | write_lock_bh(&bond->curr_slave_lock); |
2101 | bond_select_active_slave(bond); | |
2102 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2103 | unblock_netpoll_tx(); |
f0c76d61 JV |
2104 | } |
2105 | ||
2106 | bond_set_carrier(bond); | |
1da177e4 LT |
2107 | } |
2108 | ||
0b0eef66 JV |
2109 | /* |
2110 | * bond_mii_monitor | |
2111 | * | |
2112 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2113 | * inspection, then (if inspection indicates something needs to be done) |
2114 | * an acquisition of appropriate locks followed by a commit phase to | |
2115 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2116 | */ |
2117 | void bond_mii_monitor(struct work_struct *work) | |
2118 | { | |
2119 | struct bonding *bond = container_of(work, struct bonding, | |
2120 | mii_work.work); | |
ad246c99 | 2121 | bool should_notify_peers = false; |
1f2cd845 | 2122 | unsigned long delay; |
0b0eef66 | 2123 | |
1f2cd845 DM |
2124 | delay = msecs_to_jiffies(bond->params.miimon); |
2125 | ||
2126 | if (!bond_has_slaves(bond)) | |
f0c76d61 | 2127 | goto re_arm; |
b59f9f74 | 2128 | |
4cb4f97b | 2129 | rcu_read_lock(); |
2130 | ||
ad246c99 BH |
2131 | should_notify_peers = bond_should_notify_peers(bond); |
2132 | ||
1f2cd845 | 2133 | if (bond_miimon_inspect(bond)) { |
4cb4f97b | 2134 | rcu_read_unlock(); |
f0c76d61 | 2135 | |
1f2cd845 DM |
2136 | /* Race avoidance with bond_close cancel of workqueue */ |
2137 | if (!rtnl_trylock()) { | |
1f2cd845 DM |
2138 | delay = 1; |
2139 | should_notify_peers = false; | |
2140 | goto re_arm; | |
2141 | } | |
6b6c5261 | 2142 | |
1f2cd845 DM |
2143 | bond_miimon_commit(bond); |
2144 | ||
1f2cd845 | 2145 | rtnl_unlock(); /* might sleep, hold no other locks */ |
4cb4f97b | 2146 | } else |
2147 | rcu_read_unlock(); | |
0b0eef66 | 2148 | |
f0c76d61 | 2149 | re_arm: |
e6d265e8 | 2150 | if (bond->params.miimon) |
1f2cd845 DM |
2151 | queue_delayed_work(bond->wq, &bond->mii_work, delay); |
2152 | ||
1f2cd845 DM |
2153 | if (should_notify_peers) { |
2154 | if (!rtnl_trylock()) | |
2155 | return; | |
2156 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); | |
2157 | rtnl_unlock(); | |
2158 | } | |
0b0eef66 | 2159 | } |
c3ade5ca | 2160 | |
50223ce4 | 2161 | static bool bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2162 | { |
50223ce4 VF |
2163 | struct net_device *upper; |
2164 | struct list_head *iter; | |
2165 | bool ret = false; | |
f5b2b966 | 2166 | |
eaddcd76 | 2167 | if (ip == bond_confirm_addr(bond->dev, 0, ip)) |
50223ce4 | 2168 | return true; |
f5b2b966 | 2169 | |
50223ce4 | 2170 | rcu_read_lock(); |
2f268f12 | 2171 | netdev_for_each_all_upper_dev_rcu(bond->dev, upper, iter) { |
50223ce4 VF |
2172 | if (ip == bond_confirm_addr(upper, 0, ip)) { |
2173 | ret = true; | |
2174 | break; | |
2175 | } | |
f5b2b966 | 2176 | } |
50223ce4 | 2177 | rcu_read_unlock(); |
f5b2b966 | 2178 | |
50223ce4 | 2179 | return ret; |
f5b2b966 JV |
2180 | } |
2181 | ||
c3ade5ca JV |
2182 | /* |
2183 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2184 | * switches in VLAN mode (especially if ports are configured as | |
2185 | * "native" to a VLAN) might not pass non-tagged frames. | |
2186 | */ | |
d3bb52b0 | 2187 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id) |
c3ade5ca JV |
2188 | { |
2189 | struct sk_buff *skb; | |
2190 | ||
acca2674 | 2191 | pr_debug("arp %d on slave %s: dst %pI4 src %pI4 vid %d\n", arp_op, |
2192 | slave_dev->name, &dest_ip, &src_ip, vlan_id); | |
3d632c3f | 2193 | |
c3ade5ca JV |
2194 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2195 | NULL, slave_dev->dev_addr, NULL); | |
2196 | ||
2197 | if (!skb) { | |
a4aee5c8 | 2198 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2199 | return; |
2200 | } | |
2201 | if (vlan_id) { | |
1fd9b1fc | 2202 | skb = vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_id); |
c3ade5ca | 2203 | if (!skb) { |
a4aee5c8 | 2204 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2205 | return; |
2206 | } | |
2207 | } | |
2208 | arp_xmit(skb); | |
2209 | } | |
2210 | ||
2211 | ||
1da177e4 LT |
2212 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2213 | { | |
27bc11e6 VF |
2214 | struct net_device *upper, *vlan_upper; |
2215 | struct list_head *iter, *vlan_iter; | |
c3ade5ca | 2216 | struct rtable *rt; |
27bc11e6 VF |
2217 | __be32 *targets = bond->params.arp_targets, addr; |
2218 | int i, vlan_id; | |
1da177e4 | 2219 | |
27bc11e6 | 2220 | for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) { |
acca2674 | 2221 | pr_debug("basa: target %pI4\n", &targets[i]); |
c3ade5ca | 2222 | |
27bc11e6 | 2223 | /* Find out through which dev should the packet go */ |
78fbfd8a DM |
2224 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2225 | RTO_ONLINK, 0); | |
b23dd4fe | 2226 | if (IS_ERR(rt)) { |
3e32582f VF |
2227 | pr_debug("%s: no route to arp_ip_target %pI4\n", |
2228 | bond->dev->name, &targets[i]); | |
c3ade5ca JV |
2229 | continue; |
2230 | } | |
2231 | ||
c3ade5ca | 2232 | vlan_id = 0; |
27bc11e6 VF |
2233 | |
2234 | /* bond device itself */ | |
2235 | if (rt->dst.dev == bond->dev) | |
2236 | goto found; | |
2237 | ||
2238 | rcu_read_lock(); | |
2239 | /* first we search only for vlan devices. for every vlan | |
2240 | * found we verify its upper dev list, searching for the | |
2241 | * rt->dst.dev. If found we save the tag of the vlan and | |
2242 | * proceed to send the packet. | |
2243 | * | |
2244 | * TODO: QinQ? | |
2245 | */ | |
2f268f12 VF |
2246 | netdev_for_each_all_upper_dev_rcu(bond->dev, vlan_upper, |
2247 | vlan_iter) { | |
27bc11e6 VF |
2248 | if (!is_vlan_dev(vlan_upper)) |
2249 | continue; | |
2f268f12 VF |
2250 | netdev_for_each_all_upper_dev_rcu(vlan_upper, upper, |
2251 | iter) { | |
27bc11e6 VF |
2252 | if (upper == rt->dst.dev) { |
2253 | vlan_id = vlan_dev_vlan_id(vlan_upper); | |
2254 | rcu_read_unlock(); | |
2255 | goto found; | |
2256 | } | |
c3ade5ca JV |
2257 | } |
2258 | } | |
2259 | ||
27bc11e6 VF |
2260 | /* if the device we're looking for is not on top of any of |
2261 | * our upper vlans, then just search for any dev that | |
2262 | * matches, and in case it's a vlan - save the id | |
2263 | */ | |
2f268f12 | 2264 | netdev_for_each_all_upper_dev_rcu(bond->dev, upper, iter) { |
27bc11e6 VF |
2265 | if (upper == rt->dst.dev) { |
2266 | /* if it's a vlan - get its VID */ | |
2267 | if (is_vlan_dev(upper)) | |
2268 | vlan_id = vlan_dev_vlan_id(upper); | |
2269 | ||
2270 | rcu_read_unlock(); | |
2271 | goto found; | |
2272 | } | |
c3ade5ca | 2273 | } |
27bc11e6 | 2274 | rcu_read_unlock(); |
c3ade5ca | 2275 | |
27bc11e6 | 2276 | /* Not our device - skip */ |
3e32582f VF |
2277 | pr_debug("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2278 | bond->dev->name, &targets[i], | |
2279 | rt->dst.dev ? rt->dst.dev->name : "NULL"); | |
2280 | ||
ed4b9f80 | 2281 | ip_rt_put(rt); |
27bc11e6 VF |
2282 | continue; |
2283 | ||
2284 | found: | |
2285 | addr = bond_confirm_addr(rt->dst.dev, targets[i], 0); | |
2286 | ip_rt_put(rt); | |
2287 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2288 | addr, vlan_id); | |
c3ade5ca JV |
2289 | } |
2290 | } | |
2291 | ||
d3bb52b0 | 2292 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 | 2293 | { |
8599b52e VF |
2294 | int i; |
2295 | ||
87a7b84b VF |
2296 | if (!sip || !bond_has_this_ip(bond, tip)) { |
2297 | pr_debug("bva: sip %pI4 tip %pI4 not found\n", &sip, &tip); | |
2298 | return; | |
2299 | } | |
f5b2b966 | 2300 | |
8599b52e VF |
2301 | i = bond_get_targets_ip(bond->params.arp_targets, sip); |
2302 | if (i == -1) { | |
87a7b84b VF |
2303 | pr_debug("bva: sip %pI4 not found in targets\n", &sip); |
2304 | return; | |
f5b2b966 | 2305 | } |
87a7b84b | 2306 | slave->last_arp_rx = jiffies; |
8599b52e | 2307 | slave->target_last_arp_rx[i] = jiffies; |
f5b2b966 JV |
2308 | } |
2309 | ||
5bb9e0b5 | 2310 | int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, |
2311 | struct slave *slave) | |
f5b2b966 | 2312 | { |
de063b70 | 2313 | struct arphdr *arp = (struct arphdr *)skb->data; |
f5b2b966 | 2314 | unsigned char *arp_ptr; |
d3bb52b0 | 2315 | __be32 sip, tip; |
de063b70 | 2316 | int alen; |
f5b2b966 | 2317 | |
3aba891d | 2318 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
13a8e0c8 | 2319 | return RX_HANDLER_ANOTHER; |
f5b2b966 | 2320 | |
f5b2b966 | 2321 | read_lock(&bond->lock); |
2c146102 VF |
2322 | |
2323 | if (!slave_do_arp_validate(bond, slave)) | |
2324 | goto out_unlock; | |
2325 | ||
de063b70 | 2326 | alen = arp_hdr_len(bond->dev); |
f5b2b966 | 2327 | |
3aba891d JP |
2328 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2329 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2330 | |
de063b70 ED |
2331 | if (alen > skb_headlen(skb)) { |
2332 | arp = kmalloc(alen, GFP_ATOMIC); | |
2333 | if (!arp) | |
2334 | goto out_unlock; | |
2335 | if (skb_copy_bits(skb, 0, arp, alen) < 0) | |
2336 | goto out_unlock; | |
2337 | } | |
f5b2b966 | 2338 | |
3aba891d | 2339 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2340 | skb->pkt_type == PACKET_OTHERHOST || |
2341 | skb->pkt_type == PACKET_LOOPBACK || | |
2342 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2343 | arp->ar_pro != htons(ETH_P_IP) || | |
2344 | arp->ar_pln != 4) | |
2345 | goto out_unlock; | |
2346 | ||
2347 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2348 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2349 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2350 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2351 | memcpy(&tip, arp_ptr, 4); |
2352 | ||
5a03cdb7 | 2353 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2354 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2355 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2356 | &sip, &tip); | |
f5b2b966 JV |
2357 | |
2358 | /* | |
2359 | * Backup slaves won't see the ARP reply, but do come through | |
2360 | * here for each ARP probe (so we swap the sip/tip to validate | |
2361 | * the probe). In a "redundant switch, common router" type of | |
2362 | * configuration, the ARP probe will (hopefully) travel from | |
2363 | * the active, through one switch, the router, then the other | |
2364 | * switch before reaching the backup. | |
aeea64ac VF |
2365 | * |
2366 | * We 'trust' the arp requests if there is an active slave and | |
2367 | * it received valid arp reply(s) after it became active. This | |
2368 | * is done to avoid endless looping when we can't reach the | |
2369 | * arp_ip_target and fool ourselves with our own arp requests. | |
f5b2b966 | 2370 | */ |
e30bc066 | 2371 | if (bond_is_active_slave(slave)) |
f5b2b966 | 2372 | bond_validate_arp(bond, slave, sip, tip); |
aeea64ac VF |
2373 | else if (bond->curr_active_slave && |
2374 | time_after(slave_last_rx(bond, bond->curr_active_slave), | |
2375 | bond->curr_active_slave->jiffies)) | |
f5b2b966 JV |
2376 | bond_validate_arp(bond, slave, tip, sip); |
2377 | ||
2378 | out_unlock: | |
2379 | read_unlock(&bond->lock); | |
de063b70 ED |
2380 | if (arp != (struct arphdr *)skb->data) |
2381 | kfree(arp); | |
13a8e0c8 | 2382 | return RX_HANDLER_ANOTHER; |
f5b2b966 JV |
2383 | } |
2384 | ||
e7f63f1d VF |
2385 | /* function to verify if we're in the arp_interval timeslice, returns true if |
2386 | * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval + | |
2387 | * arp_interval/2) . the arp_interval/2 is needed for really fast networks. | |
2388 | */ | |
2389 | static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act, | |
2390 | int mod) | |
2391 | { | |
2392 | int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); | |
2393 | ||
2394 | return time_in_range(jiffies, | |
2395 | last_act - delta_in_ticks, | |
2396 | last_act + mod * delta_in_ticks + delta_in_ticks/2); | |
2397 | } | |
2398 | ||
1da177e4 LT |
2399 | /* |
2400 | * this function is called regularly to monitor each slave's link | |
2401 | * ensuring that traffic is being sent and received when arp monitoring | |
2402 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2403 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2404 | * arp monitoring in active backup mode. | |
2405 | */ | |
1b76b316 | 2406 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2407 | { |
1b76b316 JV |
2408 | struct bonding *bond = container_of(work, struct bonding, |
2409 | arp_work.work); | |
1da177e4 | 2410 | struct slave *slave, *oldcurrent; |
9caff1e7 | 2411 | struct list_head *iter; |
1da177e4 | 2412 | int do_failover = 0; |
1da177e4 | 2413 | |
1f2cd845 | 2414 | if (!bond_has_slaves(bond)) |
1da177e4 | 2415 | goto re_arm; |
1da177e4 | 2416 | |
2e52f4fe | 2417 | rcu_read_lock(); |
2418 | ||
2419 | oldcurrent = ACCESS_ONCE(bond->curr_active_slave); | |
1da177e4 LT |
2420 | /* see if any of the previous devices are up now (i.e. they have |
2421 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2422 | * the picture unless it is null. also, slave->jiffies is not needed | |
2423 | * here because we send an arp on each slave and give a slave as | |
2424 | * long as it needs to get the tx/rx within the delta. | |
2425 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2426 | * so it can wait | |
2427 | */ | |
2e52f4fe | 2428 | bond_for_each_slave_rcu(bond, slave, iter) { |
cb32f2a0 JB |
2429 | unsigned long trans_start = dev_trans_start(slave->dev); |
2430 | ||
1da177e4 | 2431 | if (slave->link != BOND_LINK_UP) { |
e7f63f1d VF |
2432 | if (bond_time_in_interval(bond, trans_start, 1) && |
2433 | bond_time_in_interval(bond, slave->dev->last_rx, 1)) { | |
1da177e4 LT |
2434 | |
2435 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2436 | bond_set_active_slave(slave); |
1da177e4 LT |
2437 | |
2438 | /* primary_slave has no meaning in round-robin | |
2439 | * mode. the window of a slave being up and | |
2440 | * curr_active_slave being null after enslaving | |
2441 | * is closed. | |
2442 | */ | |
2443 | if (!oldcurrent) { | |
a4aee5c8 JP |
2444 | pr_info("%s: link status definitely up for interface %s, ", |
2445 | bond->dev->name, | |
2446 | slave->dev->name); | |
1da177e4 LT |
2447 | do_failover = 1; |
2448 | } else { | |
a4aee5c8 JP |
2449 | pr_info("%s: interface %s is now up\n", |
2450 | bond->dev->name, | |
2451 | slave->dev->name); | |
1da177e4 LT |
2452 | } |
2453 | } | |
2454 | } else { | |
2455 | /* slave->link == BOND_LINK_UP */ | |
2456 | ||
2457 | /* not all switches will respond to an arp request | |
2458 | * when the source ip is 0, so don't take the link down | |
2459 | * if we don't know our ip yet | |
2460 | */ | |
e7f63f1d VF |
2461 | if (!bond_time_in_interval(bond, trans_start, 2) || |
2462 | !bond_time_in_interval(bond, slave->dev->last_rx, 2)) { | |
1da177e4 LT |
2463 | |
2464 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2465 | bond_set_backup_slave(slave); |
1da177e4 | 2466 | |
3d632c3f | 2467 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2468 | slave->link_failure_count++; |
1da177e4 | 2469 | |
a4aee5c8 JP |
2470 | pr_info("%s: interface %s is now down.\n", |
2471 | bond->dev->name, | |
2472 | slave->dev->name); | |
1da177e4 | 2473 | |
3d632c3f | 2474 | if (slave == oldcurrent) |
1da177e4 | 2475 | do_failover = 1; |
1da177e4 LT |
2476 | } |
2477 | } | |
2478 | ||
2479 | /* note: if switch is in round-robin mode, all links | |
2480 | * must tx arp to ensure all links rx an arp - otherwise | |
2481 | * links may oscillate or not come up at all; if switch is | |
2482 | * in something like xor mode, there is nothing we can | |
2483 | * do - all replies will be rx'ed on same link causing slaves | |
2484 | * to be unstable during low/no traffic periods | |
2485 | */ | |
3d632c3f | 2486 | if (IS_UP(slave->dev)) |
1da177e4 | 2487 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2488 | } |
2489 | ||
2e52f4fe | 2490 | rcu_read_unlock(); |
2491 | ||
1da177e4 | 2492 | if (do_failover) { |
2e52f4fe | 2493 | /* the bond_select_active_slave must hold RTNL |
2494 | * and curr_slave_lock for write. | |
2495 | */ | |
2496 | if (!rtnl_trylock()) | |
2497 | goto re_arm; | |
e843fa50 | 2498 | block_netpoll_tx(); |
059fe7a5 | 2499 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2500 | |
2501 | bond_select_active_slave(bond); | |
2502 | ||
059fe7a5 | 2503 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2504 | unblock_netpoll_tx(); |
2e52f4fe | 2505 | rtnl_unlock(); |
1da177e4 LT |
2506 | } |
2507 | ||
2508 | re_arm: | |
e6d265e8 | 2509 | if (bond->params.arp_interval) |
e7f63f1d VF |
2510 | queue_delayed_work(bond->wq, &bond->arp_work, |
2511 | msecs_to_jiffies(bond->params.arp_interval)); | |
1da177e4 LT |
2512 | } |
2513 | ||
2514 | /* | |
b2220cad JV |
2515 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2516 | * changes. Sets new_link in slaves to specify what action should take | |
2517 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2518 | * to link states must be committed. | |
2519 | * | |
eb9fa4b0 | 2520 | * Called with rcu_read_lock hold. |
1da177e4 | 2521 | */ |
e7f63f1d | 2522 | static int bond_ab_arp_inspect(struct bonding *bond) |
1da177e4 | 2523 | { |
def4460c | 2524 | unsigned long trans_start, last_rx; |
9caff1e7 | 2525 | struct list_head *iter; |
dec1e90e | 2526 | struct slave *slave; |
dec1e90e | 2527 | int commit = 0; |
da210f55 | 2528 | |
eb9fa4b0 | 2529 | bond_for_each_slave_rcu(bond, slave, iter) { |
b2220cad | 2530 | slave->new_link = BOND_LINK_NOCHANGE; |
def4460c | 2531 | last_rx = slave_last_rx(bond, slave); |
1da177e4 | 2532 | |
b2220cad | 2533 | if (slave->link != BOND_LINK_UP) { |
e7f63f1d | 2534 | if (bond_time_in_interval(bond, last_rx, 1)) { |
b2220cad JV |
2535 | slave->new_link = BOND_LINK_UP; |
2536 | commit++; | |
2537 | } | |
b2220cad JV |
2538 | continue; |
2539 | } | |
1da177e4 | 2540 | |
b2220cad JV |
2541 | /* |
2542 | * Give slaves 2*delta after being enslaved or made | |
2543 | * active. This avoids bouncing, as the last receive | |
2544 | * times need a full ARP monitor cycle to be updated. | |
2545 | */ | |
e7f63f1d | 2546 | if (bond_time_in_interval(bond, slave->jiffies, 2)) |
b2220cad JV |
2547 | continue; |
2548 | ||
2549 | /* | |
2550 | * Backup slave is down if: | |
2551 | * - No current_arp_slave AND | |
2552 | * - more than 3*delta since last receive AND | |
2553 | * - the bond has an IP address | |
2554 | * | |
2555 | * Note: a non-null current_arp_slave indicates | |
2556 | * the curr_active_slave went down and we are | |
2557 | * searching for a new one; under this condition | |
2558 | * we only take the curr_active_slave down - this | |
2559 | * gives each slave a chance to tx/rx traffic | |
2560 | * before being taken out | |
2561 | */ | |
e30bc066 | 2562 | if (!bond_is_active_slave(slave) && |
b2220cad | 2563 | !bond->current_arp_slave && |
e7f63f1d | 2564 | !bond_time_in_interval(bond, last_rx, 3)) { |
b2220cad JV |
2565 | slave->new_link = BOND_LINK_DOWN; |
2566 | commit++; | |
2567 | } | |
2568 | ||
2569 | /* | |
2570 | * Active slave is down if: | |
2571 | * - more than 2*delta since transmitting OR | |
2572 | * - (more than 2*delta since receive AND | |
2573 | * the bond has an IP address) | |
2574 | */ | |
cb32f2a0 | 2575 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2576 | if (bond_is_active_slave(slave) && |
e7f63f1d VF |
2577 | (!bond_time_in_interval(bond, trans_start, 2) || |
2578 | !bond_time_in_interval(bond, last_rx, 2))) { | |
b2220cad JV |
2579 | slave->new_link = BOND_LINK_DOWN; |
2580 | commit++; | |
2581 | } | |
1da177e4 LT |
2582 | } |
2583 | ||
b2220cad JV |
2584 | return commit; |
2585 | } | |
1da177e4 | 2586 | |
b2220cad JV |
2587 | /* |
2588 | * Called to commit link state changes noted by inspection step of | |
2589 | * active-backup mode ARP monitor. | |
2590 | * | |
eb9fa4b0 | 2591 | * Called with RTNL hold. |
b2220cad | 2592 | */ |
e7f63f1d | 2593 | static void bond_ab_arp_commit(struct bonding *bond) |
b2220cad | 2594 | { |
cb32f2a0 | 2595 | unsigned long trans_start; |
9caff1e7 | 2596 | struct list_head *iter; |
dec1e90e | 2597 | struct slave *slave; |
1da177e4 | 2598 | |
9caff1e7 | 2599 | bond_for_each_slave(bond, slave, iter) { |
b2220cad JV |
2600 | switch (slave->new_link) { |
2601 | case BOND_LINK_NOCHANGE: | |
2602 | continue; | |
ff59c456 | 2603 | |
b2220cad | 2604 | case BOND_LINK_UP: |
cb32f2a0 | 2605 | trans_start = dev_trans_start(slave->dev); |
e7f63f1d VF |
2606 | if (bond->curr_active_slave != slave || |
2607 | (!bond->curr_active_slave && | |
2608 | bond_time_in_interval(bond, trans_start, 1))) { | |
b2220cad | 2609 | slave->link = BOND_LINK_UP; |
5a430974 VF |
2610 | if (bond->current_arp_slave) { |
2611 | bond_set_slave_inactive_flags( | |
2612 | bond->current_arp_slave); | |
2613 | bond->current_arp_slave = NULL; | |
2614 | } | |
b2220cad | 2615 | |
a4aee5c8 | 2616 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 2617 | bond->dev->name, slave->dev->name); |
b2220cad | 2618 | |
b9f60253 JP |
2619 | if (!bond->curr_active_slave || |
2620 | (slave == bond->primary_slave)) | |
2621 | goto do_failover; | |
1da177e4 | 2622 | |
b9f60253 | 2623 | } |
1da177e4 | 2624 | |
b9f60253 | 2625 | continue; |
1da177e4 | 2626 | |
b2220cad JV |
2627 | case BOND_LINK_DOWN: |
2628 | if (slave->link_failure_count < UINT_MAX) | |
2629 | slave->link_failure_count++; | |
2630 | ||
2631 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 2632 | bond_set_slave_inactive_flags(slave); |
b2220cad | 2633 | |
a4aee5c8 | 2634 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 2635 | bond->dev->name, slave->dev->name); |
b2220cad | 2636 | |
b9f60253 | 2637 | if (slave == bond->curr_active_slave) { |
b2220cad | 2638 | bond->current_arp_slave = NULL; |
b9f60253 | 2639 | goto do_failover; |
1da177e4 | 2640 | } |
b9f60253 JP |
2641 | |
2642 | continue; | |
b2220cad JV |
2643 | |
2644 | default: | |
a4aee5c8 | 2645 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
2646 | bond->dev->name, slave->new_link, |
2647 | slave->dev->name); | |
b9f60253 | 2648 | continue; |
1da177e4 | 2649 | } |
1da177e4 | 2650 | |
b9f60253 JP |
2651 | do_failover: |
2652 | ASSERT_RTNL(); | |
e843fa50 | 2653 | block_netpoll_tx(); |
b2220cad | 2654 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 2655 | bond_select_active_slave(bond); |
b2220cad | 2656 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2657 | unblock_netpoll_tx(); |
b2220cad | 2658 | } |
1da177e4 | 2659 | |
b2220cad JV |
2660 | bond_set_carrier(bond); |
2661 | } | |
1da177e4 | 2662 | |
b2220cad JV |
2663 | /* |
2664 | * Send ARP probes for active-backup mode ARP monitor. | |
2665 | * | |
eb9fa4b0 | 2666 | * Called with rcu_read_lock hold. |
b2220cad JV |
2667 | */ |
2668 | static void bond_ab_arp_probe(struct bonding *bond) | |
2669 | { | |
eb9fa4b0 | 2670 | struct slave *slave, *before = NULL, *new_slave = NULL, |
2671 | *curr_arp_slave = rcu_dereference(bond->current_arp_slave); | |
4087df87 VF |
2672 | struct list_head *iter; |
2673 | bool found = false; | |
1da177e4 | 2674 | |
b2220cad | 2675 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2676 | |
eb9fa4b0 | 2677 | if (curr_arp_slave && bond->curr_active_slave) |
a4aee5c8 | 2678 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
eb9fa4b0 | 2679 | curr_arp_slave->dev->name, |
a4aee5c8 | 2680 | bond->curr_active_slave->dev->name); |
1da177e4 | 2681 | |
b2220cad JV |
2682 | if (bond->curr_active_slave) { |
2683 | bond_arp_send_all(bond, bond->curr_active_slave); | |
2684 | read_unlock(&bond->curr_slave_lock); | |
2685 | return; | |
2686 | } | |
1da177e4 | 2687 | |
b2220cad | 2688 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 2689 | |
b2220cad JV |
2690 | /* if we don't have a curr_active_slave, search for the next available |
2691 | * backup slave from the current_arp_slave and make it the candidate | |
2692 | * for becoming the curr_active_slave | |
2693 | */ | |
1da177e4 | 2694 | |
eb9fa4b0 | 2695 | if (!curr_arp_slave) { |
2696 | curr_arp_slave = bond_first_slave_rcu(bond); | |
2697 | if (!curr_arp_slave) | |
b2220cad JV |
2698 | return; |
2699 | } | |
1da177e4 | 2700 | |
eb9fa4b0 | 2701 | bond_set_slave_inactive_flags(curr_arp_slave); |
059fe7a5 | 2702 | |
eb9fa4b0 | 2703 | bond_for_each_slave_rcu(bond, slave, iter) { |
4087df87 VF |
2704 | if (!found && !before && IS_UP(slave->dev)) |
2705 | before = slave; | |
1da177e4 | 2706 | |
4087df87 VF |
2707 | if (found && !new_slave && IS_UP(slave->dev)) |
2708 | new_slave = slave; | |
b2220cad JV |
2709 | /* if the link state is up at this point, we |
2710 | * mark it down - this can happen if we have | |
2711 | * simultaneous link failures and | |
2712 | * reselect_active_interface doesn't make this | |
2713 | * one the current slave so it is still marked | |
2714 | * up when it is actually down | |
1da177e4 | 2715 | */ |
4087df87 | 2716 | if (!IS_UP(slave->dev) && slave->link == BOND_LINK_UP) { |
b2220cad JV |
2717 | slave->link = BOND_LINK_DOWN; |
2718 | if (slave->link_failure_count < UINT_MAX) | |
2719 | slave->link_failure_count++; | |
1da177e4 | 2720 | |
b2220cad JV |
2721 | bond_set_slave_inactive_flags(slave); |
2722 | ||
a4aee5c8 JP |
2723 | pr_info("%s: backup interface %s is now down.\n", |
2724 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2725 | } |
eb9fa4b0 | 2726 | if (slave == curr_arp_slave) |
4087df87 | 2727 | found = true; |
b2220cad | 2728 | } |
4087df87 VF |
2729 | |
2730 | if (!new_slave && before) | |
2731 | new_slave = before; | |
2732 | ||
2733 | if (!new_slave) | |
2734 | return; | |
2735 | ||
2736 | new_slave->link = BOND_LINK_BACK; | |
2737 | bond_set_slave_active_flags(new_slave); | |
2738 | bond_arp_send_all(bond, new_slave); | |
2739 | new_slave->jiffies = jiffies; | |
eb9fa4b0 | 2740 | rcu_assign_pointer(bond->current_arp_slave, new_slave); |
b2220cad | 2741 | } |
1da177e4 | 2742 | |
b2220cad JV |
2743 | void bond_activebackup_arp_mon(struct work_struct *work) |
2744 | { | |
2745 | struct bonding *bond = container_of(work, struct bonding, | |
2746 | arp_work.work); | |
ad246c99 | 2747 | bool should_notify_peers = false; |
1f2cd845 | 2748 | int delta_in_ticks; |
1da177e4 | 2749 | |
1f2cd845 DM |
2750 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
2751 | ||
2752 | if (!bond_has_slaves(bond)) | |
b2220cad JV |
2753 | goto re_arm; |
2754 | ||
eb9fa4b0 | 2755 | rcu_read_lock(); |
2756 | ||
ad246c99 BH |
2757 | should_notify_peers = bond_should_notify_peers(bond); |
2758 | ||
1f2cd845 | 2759 | if (bond_ab_arp_inspect(bond)) { |
eb9fa4b0 | 2760 | rcu_read_unlock(); |
b2220cad | 2761 | |
1f2cd845 DM |
2762 | /* Race avoidance with bond_close flush of workqueue */ |
2763 | if (!rtnl_trylock()) { | |
1f2cd845 DM |
2764 | delta_in_ticks = 1; |
2765 | should_notify_peers = false; | |
2766 | goto re_arm; | |
2767 | } | |
b2220cad | 2768 | |
1f2cd845 DM |
2769 | bond_ab_arp_commit(bond); |
2770 | ||
1f2cd845 | 2771 | rtnl_unlock(); |
eb9fa4b0 | 2772 | rcu_read_lock(); |
1f2cd845 DM |
2773 | } |
2774 | ||
2775 | bond_ab_arp_probe(bond); | |
eb9fa4b0 | 2776 | rcu_read_unlock(); |
ad246c99 | 2777 | |
80b9d236 | 2778 | re_arm: |
2779 | if (bond->params.arp_interval) | |
1f2cd845 DM |
2780 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
2781 | ||
1f2cd845 DM |
2782 | if (should_notify_peers) { |
2783 | if (!rtnl_trylock()) | |
2784 | return; | |
2785 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); | |
2786 | rtnl_unlock(); | |
2787 | } | |
1da177e4 LT |
2788 | } |
2789 | ||
1da177e4 LT |
2790 | /*-------------------------- netdev event handling --------------------------*/ |
2791 | ||
2792 | /* | |
2793 | * Change device name | |
2794 | */ | |
2795 | static int bond_event_changename(struct bonding *bond) | |
2796 | { | |
1da177e4 LT |
2797 | bond_remove_proc_entry(bond); |
2798 | bond_create_proc_entry(bond); | |
7e083840 | 2799 | |
f073c7ca TI |
2800 | bond_debug_reregister(bond); |
2801 | ||
1da177e4 LT |
2802 | return NOTIFY_DONE; |
2803 | } | |
2804 | ||
3d632c3f SH |
2805 | static int bond_master_netdev_event(unsigned long event, |
2806 | struct net_device *bond_dev) | |
1da177e4 | 2807 | { |
454d7c9b | 2808 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
2809 | |
2810 | switch (event) { | |
2811 | case NETDEV_CHANGENAME: | |
2812 | return bond_event_changename(event_bond); | |
a64d49c3 EB |
2813 | case NETDEV_UNREGISTER: |
2814 | bond_remove_proc_entry(event_bond); | |
2815 | break; | |
2816 | case NETDEV_REGISTER: | |
2817 | bond_create_proc_entry(event_bond); | |
2818 | break; | |
6c8d23f7 | 2819 | case NETDEV_NOTIFY_PEERS: |
2820 | if (event_bond->send_peer_notif) | |
2821 | event_bond->send_peer_notif--; | |
2822 | break; | |
1da177e4 LT |
2823 | default: |
2824 | break; | |
2825 | } | |
2826 | ||
2827 | return NOTIFY_DONE; | |
2828 | } | |
2829 | ||
3d632c3f SH |
2830 | static int bond_slave_netdev_event(unsigned long event, |
2831 | struct net_device *slave_dev) | |
1da177e4 | 2832 | { |
471cb5a3 | 2833 | struct slave *slave = bond_slave_get_rtnl(slave_dev); |
6101391d | 2834 | struct bonding *bond; |
2835 | struct net_device *bond_dev; | |
471cb5a3 JP |
2836 | u32 old_speed; |
2837 | u8 old_duplex; | |
1da177e4 | 2838 | |
6101391d | 2839 | /* A netdev event can be generated while enslaving a device |
2840 | * before netdev_rx_handler_register is called in which case | |
2841 | * slave will be NULL | |
2842 | */ | |
2843 | if (!slave) | |
2844 | return NOTIFY_DONE; | |
2845 | bond_dev = slave->bond->dev; | |
2846 | bond = slave->bond; | |
2847 | ||
1da177e4 LT |
2848 | switch (event) { |
2849 | case NETDEV_UNREGISTER: | |
8d2ada77 | 2850 | if (bond_dev->type != ARPHRD_ETHER) |
471cb5a3 JP |
2851 | bond_release_and_destroy(bond_dev, slave_dev); |
2852 | else | |
2853 | bond_release(bond_dev, slave_dev); | |
1da177e4 | 2854 | break; |
98f41f69 | 2855 | case NETDEV_UP: |
1da177e4 | 2856 | case NETDEV_CHANGE: |
471cb5a3 JP |
2857 | old_speed = slave->speed; |
2858 | old_duplex = slave->duplex; | |
17d04500 | 2859 | |
471cb5a3 | 2860 | bond_update_speed_duplex(slave); |
17d04500 | 2861 | |
471cb5a3 JP |
2862 | if (bond->params.mode == BOND_MODE_8023AD) { |
2863 | if (old_speed != slave->speed) | |
2864 | bond_3ad_adapter_speed_changed(slave); | |
2865 | if (old_duplex != slave->duplex) | |
2866 | bond_3ad_adapter_duplex_changed(slave); | |
17d04500 | 2867 | } |
1da177e4 LT |
2868 | break; |
2869 | case NETDEV_DOWN: | |
2870 | /* | |
2871 | * ... Or is it this? | |
2872 | */ | |
2873 | break; | |
2874 | case NETDEV_CHANGEMTU: | |
2875 | /* | |
2876 | * TODO: Should slaves be allowed to | |
2877 | * independently alter their MTU? For | |
2878 | * an active-backup bond, slaves need | |
2879 | * not be the same type of device, so | |
2880 | * MTUs may vary. For other modes, | |
2881 | * slaves arguably should have the | |
2882 | * same MTUs. To do this, we'd need to | |
2883 | * take over the slave's change_mtu | |
2884 | * function for the duration of their | |
2885 | * servitude. | |
2886 | */ | |
2887 | break; | |
2888 | case NETDEV_CHANGENAME: | |
2889 | /* | |
2890 | * TODO: handle changing the primary's name | |
2891 | */ | |
2892 | break; | |
8531c5ff AK |
2893 | case NETDEV_FEAT_CHANGE: |
2894 | bond_compute_features(bond); | |
2895 | break; | |
4aa5dee4 JP |
2896 | case NETDEV_RESEND_IGMP: |
2897 | /* Propagate to master device */ | |
2898 | call_netdevice_notifiers(event, slave->bond->dev); | |
2899 | break; | |
1da177e4 LT |
2900 | default: |
2901 | break; | |
2902 | } | |
2903 | ||
2904 | return NOTIFY_DONE; | |
2905 | } | |
2906 | ||
2907 | /* | |
2908 | * bond_netdev_event: handle netdev notifier chain events. | |
2909 | * | |
2910 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 2911 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
2912 | * locks for us to safely manipulate the slave devices (RTNL lock, |
2913 | * dev_probe_lock). | |
2914 | */ | |
3d632c3f SH |
2915 | static int bond_netdev_event(struct notifier_block *this, |
2916 | unsigned long event, void *ptr) | |
1da177e4 | 2917 | { |
351638e7 | 2918 | struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 | 2919 | |
5a03cdb7 | 2920 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
2921 | event_dev ? event_dev->name : "None", |
2922 | event); | |
1da177e4 | 2923 | |
0b680e75 JV |
2924 | if (!(event_dev->priv_flags & IFF_BONDING)) |
2925 | return NOTIFY_DONE; | |
2926 | ||
1da177e4 | 2927 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 2928 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
2929 | return bond_master_netdev_event(event, event_dev); |
2930 | } | |
2931 | ||
2932 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 2933 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
2934 | return bond_slave_netdev_event(event, event_dev); |
2935 | } | |
2936 | ||
2937 | return NOTIFY_DONE; | |
2938 | } | |
2939 | ||
2940 | static struct notifier_block bond_netdev_notifier = { | |
2941 | .notifier_call = bond_netdev_event, | |
2942 | }; | |
2943 | ||
169a3e66 JV |
2944 | /*---------------------------- Hashing Policies -----------------------------*/ |
2945 | ||
32819dc1 NA |
2946 | /* L2 hash helper */ |
2947 | static inline u32 bond_eth_hash(struct sk_buff *skb) | |
6b923cb7 JE |
2948 | { |
2949 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
2950 | ||
2951 | if (skb_headlen(skb) >= offsetof(struct ethhdr, h_proto)) | |
32819dc1 | 2952 | return data->h_dest[5] ^ data->h_source[5]; |
6b923cb7 JE |
2953 | |
2954 | return 0; | |
2955 | } | |
2956 | ||
32819dc1 NA |
2957 | /* Extract the appropriate headers based on bond's xmit policy */ |
2958 | static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, | |
2959 | struct flow_keys *fk) | |
6f6652be | 2960 | { |
32819dc1 | 2961 | const struct ipv6hdr *iph6; |
4394542c | 2962 | const struct iphdr *iph; |
32819dc1 | 2963 | int noff, proto = -1; |
6b923cb7 | 2964 | |
32819dc1 NA |
2965 | if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23) |
2966 | return skb_flow_dissect(skb, fk); | |
2967 | ||
2968 | fk->ports = 0; | |
2969 | noff = skb_network_offset(skb); | |
2970 | if (skb->protocol == htons(ETH_P_IP)) { | |
2971 | if (!pskb_may_pull(skb, noff + sizeof(*iph))) | |
2972 | return false; | |
6b923cb7 | 2973 | iph = ip_hdr(skb); |
32819dc1 NA |
2974 | fk->src = iph->saddr; |
2975 | fk->dst = iph->daddr; | |
2976 | noff += iph->ihl << 2; | |
2977 | if (!ip_is_fragment(iph)) | |
2978 | proto = iph->protocol; | |
2979 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
2980 | if (!pskb_may_pull(skb, noff + sizeof(*iph6))) | |
2981 | return false; | |
2982 | iph6 = ipv6_hdr(skb); | |
2983 | fk->src = (__force __be32)ipv6_addr_hash(&iph6->saddr); | |
2984 | fk->dst = (__force __be32)ipv6_addr_hash(&iph6->daddr); | |
2985 | noff += sizeof(*iph6); | |
2986 | proto = iph6->nexthdr; | |
2987 | } else { | |
2988 | return false; | |
6f6652be | 2989 | } |
32819dc1 NA |
2990 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0) |
2991 | fk->ports = skb_flow_get_ports(skb, noff, proto); | |
6f6652be | 2992 | |
32819dc1 | 2993 | return true; |
6f6652be JV |
2994 | } |
2995 | ||
32819dc1 NA |
2996 | /** |
2997 | * bond_xmit_hash - generate a hash value based on the xmit policy | |
2998 | * @bond: bonding device | |
2999 | * @skb: buffer to use for headers | |
3000 | * @count: modulo value | |
3001 | * | |
3002 | * This function will extract the necessary headers from the skb buffer and use | |
3003 | * them to generate a hash based on the xmit_policy set in the bonding device | |
3004 | * which will be reduced modulo count before returning. | |
169a3e66 | 3005 | */ |
32819dc1 | 3006 | int bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, int count) |
169a3e66 | 3007 | { |
32819dc1 NA |
3008 | struct flow_keys flow; |
3009 | u32 hash; | |
4394542c | 3010 | |
32819dc1 NA |
3011 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 || |
3012 | !bond_flow_dissect(bond, skb, &flow)) | |
3013 | return bond_eth_hash(skb) % count; | |
169a3e66 | 3014 | |
32819dc1 NA |
3015 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 || |
3016 | bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23) | |
3017 | hash = bond_eth_hash(skb); | |
3018 | else | |
3019 | hash = (__force u32)flow.ports; | |
3020 | hash ^= (__force u32)flow.dst ^ (__force u32)flow.src; | |
3021 | hash ^= (hash >> 16); | |
3022 | hash ^= (hash >> 8); | |
3023 | ||
3024 | return hash % count; | |
169a3e66 JV |
3025 | } |
3026 | ||
1da177e4 LT |
3027 | /*-------------------------- Device entry points ----------------------------*/ |
3028 | ||
fbb0c41b | 3029 | static void bond_work_init_all(struct bonding *bond) |
3030 | { | |
3031 | INIT_DELAYED_WORK(&bond->mcast_work, | |
3032 | bond_resend_igmp_join_requests_delayed); | |
3033 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); | |
3034 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); | |
3035 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3036 | INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon); | |
3037 | else | |
3038 | INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon); | |
3039 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); | |
3040 | } | |
3041 | ||
3042 | static void bond_work_cancel_all(struct bonding *bond) | |
3043 | { | |
3044 | cancel_delayed_work_sync(&bond->mii_work); | |
3045 | cancel_delayed_work_sync(&bond->arp_work); | |
3046 | cancel_delayed_work_sync(&bond->alb_work); | |
3047 | cancel_delayed_work_sync(&bond->ad_work); | |
3048 | cancel_delayed_work_sync(&bond->mcast_work); | |
3049 | } | |
3050 | ||
1da177e4 LT |
3051 | static int bond_open(struct net_device *bond_dev) |
3052 | { | |
454d7c9b | 3053 | struct bonding *bond = netdev_priv(bond_dev); |
9caff1e7 | 3054 | struct list_head *iter; |
ba3211cc | 3055 | struct slave *slave; |
1da177e4 | 3056 | |
ba3211cc PP |
3057 | /* reset slave->backup and slave->inactive */ |
3058 | read_lock(&bond->lock); | |
0965a1f3 | 3059 | if (bond_has_slaves(bond)) { |
ba3211cc | 3060 | read_lock(&bond->curr_slave_lock); |
9caff1e7 | 3061 | bond_for_each_slave(bond, slave, iter) { |
ba3211cc PP |
3062 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3063 | && (slave != bond->curr_active_slave)) { | |
3064 | bond_set_slave_inactive_flags(slave); | |
3065 | } else { | |
3066 | bond_set_slave_active_flags(slave); | |
3067 | } | |
3068 | } | |
3069 | read_unlock(&bond->curr_slave_lock); | |
3070 | } | |
3071 | read_unlock(&bond->lock); | |
3072 | ||
fbb0c41b | 3073 | bond_work_init_all(bond); |
5a37e8ca | 3074 | |
58402054 | 3075 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3076 | /* bond_alb_initialize must be called before the timer |
3077 | * is started. | |
3078 | */ | |
fbb0c41b | 3079 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) |
b473946a | 3080 | return -ENOMEM; |
1b76b316 | 3081 | queue_delayed_work(bond->wq, &bond->alb_work, 0); |
1da177e4 LT |
3082 | } |
3083 | ||
fbb0c41b | 3084 | if (bond->params.miimon) /* link check interval, in milliseconds. */ |
1b76b316 | 3085 | queue_delayed_work(bond->wq, &bond->mii_work, 0); |
1da177e4 LT |
3086 | |
3087 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3088 | queue_delayed_work(bond->wq, &bond->arp_work, 0); |
f5b2b966 | 3089 | if (bond->params.arp_validate) |
3aba891d | 3090 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3091 | } |
3092 | ||
3093 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1b76b316 | 3094 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3095 | /* register to receive LACPDUs */ |
3aba891d | 3096 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3097 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3098 | } |
3099 | ||
3100 | return 0; | |
3101 | } | |
3102 | ||
3103 | static int bond_close(struct net_device *bond_dev) | |
3104 | { | |
454d7c9b | 3105 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3106 | |
fbb0c41b | 3107 | bond_work_cancel_all(bond); |
6c8d23f7 | 3108 | bond->send_peer_notif = 0; |
ee8487c0 | 3109 | if (bond_is_lb(bond)) |
1da177e4 | 3110 | bond_alb_deinitialize(bond); |
3aba891d | 3111 | bond->recv_probe = NULL; |
1da177e4 LT |
3112 | |
3113 | return 0; | |
3114 | } | |
3115 | ||
28172739 ED |
3116 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3117 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3118 | { |
454d7c9b | 3119 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3120 | struct rtnl_link_stats64 temp; |
9caff1e7 | 3121 | struct list_head *iter; |
1da177e4 | 3122 | struct slave *slave; |
1da177e4 | 3123 | |
28172739 | 3124 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3125 | |
3126 | read_lock_bh(&bond->lock); | |
9caff1e7 | 3127 | bond_for_each_slave(bond, slave, iter) { |
be1f3c2c | 3128 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3129 | dev_get_stats(slave->dev, &temp); |
3130 | ||
3131 | stats->rx_packets += sstats->rx_packets; | |
3132 | stats->rx_bytes += sstats->rx_bytes; | |
3133 | stats->rx_errors += sstats->rx_errors; | |
3134 | stats->rx_dropped += sstats->rx_dropped; | |
3135 | ||
3136 | stats->tx_packets += sstats->tx_packets; | |
3137 | stats->tx_bytes += sstats->tx_bytes; | |
3138 | stats->tx_errors += sstats->tx_errors; | |
3139 | stats->tx_dropped += sstats->tx_dropped; | |
3140 | ||
3141 | stats->multicast += sstats->multicast; | |
3142 | stats->collisions += sstats->collisions; | |
3143 | ||
3144 | stats->rx_length_errors += sstats->rx_length_errors; | |
3145 | stats->rx_over_errors += sstats->rx_over_errors; | |
3146 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3147 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3148 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3149 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3150 | ||
3151 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3152 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3153 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3154 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3155 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb | 3156 | } |
1da177e4 LT |
3157 | read_unlock_bh(&bond->lock); |
3158 | ||
3159 | return stats; | |
3160 | } | |
3161 | ||
3162 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3163 | { | |
080a06e1 | 3164 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3165 | struct net_device *slave_dev = NULL; |
3166 | struct ifbond k_binfo; | |
3167 | struct ifbond __user *u_binfo = NULL; | |
3168 | struct ifslave k_sinfo; | |
3169 | struct ifslave __user *u_sinfo = NULL; | |
3170 | struct mii_ioctl_data *mii = NULL; | |
387ff911 | 3171 | struct net *net; |
1da177e4 LT |
3172 | int res = 0; |
3173 | ||
a4aee5c8 | 3174 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3175 | |
3176 | switch (cmd) { | |
1da177e4 LT |
3177 | case SIOCGMIIPHY: |
3178 | mii = if_mii(ifr); | |
3d632c3f | 3179 | if (!mii) |
1da177e4 | 3180 | return -EINVAL; |
3d632c3f | 3181 | |
1da177e4 LT |
3182 | mii->phy_id = 0; |
3183 | /* Fall Through */ | |
3184 | case SIOCGMIIREG: | |
3185 | /* | |
3186 | * We do this again just in case we were called by SIOCGMIIREG | |
3187 | * instead of SIOCGMIIPHY. | |
3188 | */ | |
3189 | mii = if_mii(ifr); | |
3d632c3f | 3190 | if (!mii) |
1da177e4 | 3191 | return -EINVAL; |
3d632c3f | 3192 | |
1da177e4 LT |
3193 | |
3194 | if (mii->reg_num == 1) { | |
1da177e4 | 3195 | mii->val_out = 0; |
6603a6f2 | 3196 | read_lock(&bond->lock); |
1da177e4 | 3197 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3198 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3199 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3200 | |
1da177e4 | 3201 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3202 | read_unlock(&bond->lock); |
1da177e4 LT |
3203 | } |
3204 | ||
3205 | return 0; | |
3206 | case BOND_INFO_QUERY_OLD: | |
3207 | case SIOCBONDINFOQUERY: | |
3208 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3209 | ||
3d632c3f | 3210 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3211 | return -EFAULT; |
1da177e4 LT |
3212 | |
3213 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3214 | if (res == 0 && |
3215 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3216 | return -EFAULT; | |
1da177e4 LT |
3217 | |
3218 | return res; | |
3219 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3220 | case SIOCBONDSLAVEINFOQUERY: | |
3221 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3222 | ||
3d632c3f | 3223 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3224 | return -EFAULT; |
1da177e4 LT |
3225 | |
3226 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3227 | if (res == 0 && |
3228 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3229 | return -EFAULT; | |
1da177e4 LT |
3230 | |
3231 | return res; | |
3232 | default: | |
3233 | /* Go on */ | |
3234 | break; | |
3235 | } | |
3236 | ||
387ff911 G |
3237 | net = dev_net(bond_dev); |
3238 | ||
3239 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1da177e4 | 3240 | return -EPERM; |
1da177e4 | 3241 | |
387ff911 | 3242 | slave_dev = dev_get_by_name(net, ifr->ifr_slave); |
1da177e4 | 3243 | |
a4aee5c8 | 3244 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3245 | |
3d632c3f | 3246 | if (!slave_dev) |
1da177e4 | 3247 | res = -ENODEV; |
3d632c3f | 3248 | else { |
a4aee5c8 | 3249 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3250 | switch (cmd) { |
3251 | case BOND_ENSLAVE_OLD: | |
3252 | case SIOCBONDENSLAVE: | |
3253 | res = bond_enslave(bond_dev, slave_dev); | |
3254 | break; | |
3255 | case BOND_RELEASE_OLD: | |
3256 | case SIOCBONDRELEASE: | |
3257 | res = bond_release(bond_dev, slave_dev); | |
3258 | break; | |
3259 | case BOND_SETHWADDR_OLD: | |
3260 | case SIOCBONDSETHWADDR: | |
409cc1f8 JP |
3261 | bond_set_dev_addr(bond_dev, slave_dev); |
3262 | res = 0; | |
1da177e4 LT |
3263 | break; |
3264 | case BOND_CHANGE_ACTIVE_OLD: | |
3265 | case SIOCBONDCHANGEACTIVE: | |
080a06e1 | 3266 | res = bond_option_active_slave_set(bond, slave_dev); |
1da177e4 LT |
3267 | break; |
3268 | default: | |
3269 | res = -EOPNOTSUPP; | |
3270 | } | |
3271 | ||
3272 | dev_put(slave_dev); | |
3273 | } | |
3274 | ||
1da177e4 LT |
3275 | return res; |
3276 | } | |
3277 | ||
d03462b9 | 3278 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3279 | { |
454d7c9b | 3280 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3281 | |
d03462b9 JP |
3282 | if (change & IFF_PROMISC) |
3283 | bond_set_promiscuity(bond, | |
3284 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3285 | |
d03462b9 JP |
3286 | if (change & IFF_ALLMULTI) |
3287 | bond_set_allmulti(bond, | |
3288 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3289 | } | |
1da177e4 | 3290 | |
303d1cbf | 3291 | static void bond_set_rx_mode(struct net_device *bond_dev) |
d03462b9 JP |
3292 | { |
3293 | struct bonding *bond = netdev_priv(bond_dev); | |
9caff1e7 | 3294 | struct list_head *iter; |
303d1cbf | 3295 | struct slave *slave; |
1da177e4 | 3296 | |
80ee5ad2 | 3297 | |
b3241870 | 3298 | rcu_read_lock(); |
303d1cbf | 3299 | if (USES_PRIMARY(bond->params.mode)) { |
b3241870 | 3300 | slave = rcu_dereference(bond->curr_active_slave); |
303d1cbf JV |
3301 | if (slave) { |
3302 | dev_uc_sync(slave->dev, bond_dev); | |
3303 | dev_mc_sync(slave->dev, bond_dev); | |
3304 | } | |
303d1cbf | 3305 | } else { |
b3241870 | 3306 | bond_for_each_slave_rcu(bond, slave, iter) { |
303d1cbf JV |
3307 | dev_uc_sync_multiple(slave->dev, bond_dev); |
3308 | dev_mc_sync_multiple(slave->dev, bond_dev); | |
3309 | } | |
1da177e4 | 3310 | } |
b3241870 | 3311 | rcu_read_unlock(); |
1da177e4 LT |
3312 | } |
3313 | ||
234bcf8a | 3314 | static int bond_neigh_init(struct neighbour *n) |
00829823 | 3315 | { |
234bcf8a | 3316 | struct bonding *bond = netdev_priv(n->dev); |
234bcf8a SP |
3317 | const struct net_device_ops *slave_ops; |
3318 | struct neigh_parms parms; | |
dec1e90e | 3319 | struct slave *slave; |
234bcf8a SP |
3320 | int ret; |
3321 | ||
dec1e90e | 3322 | slave = bond_first_slave(bond); |
234bcf8a SP |
3323 | if (!slave) |
3324 | return 0; | |
234bcf8a | 3325 | slave_ops = slave->dev->netdev_ops; |
234bcf8a SP |
3326 | if (!slave_ops->ndo_neigh_setup) |
3327 | return 0; | |
3328 | ||
3329 | parms.neigh_setup = NULL; | |
3330 | parms.neigh_cleanup = NULL; | |
3331 | ret = slave_ops->ndo_neigh_setup(slave->dev, &parms); | |
3332 | if (ret) | |
3333 | return ret; | |
3334 | ||
3335 | /* | |
3336 | * Assign slave's neigh_cleanup to neighbour in case cleanup is called | |
3337 | * after the last slave has been detached. Assumes that all slaves | |
3338 | * utilize the same neigh_cleanup (true at this writing as only user | |
3339 | * is ipoib). | |
3340 | */ | |
3341 | n->parms->neigh_cleanup = parms.neigh_cleanup; | |
3342 | ||
3343 | if (!parms.neigh_setup) | |
3344 | return 0; | |
3345 | ||
3346 | return parms.neigh_setup(n); | |
3347 | } | |
3348 | ||
3349 | /* | |
3350 | * The bonding ndo_neigh_setup is called at init time beofre any | |
3351 | * slave exists. So we must declare proxy setup function which will | |
3352 | * be used at run time to resolve the actual slave neigh param setup. | |
9918d5bf VF |
3353 | * |
3354 | * It's also called by master devices (such as vlans) to setup their | |
3355 | * underlying devices. In that case - do nothing, we're already set up from | |
3356 | * our init. | |
234bcf8a SP |
3357 | */ |
3358 | static int bond_neigh_setup(struct net_device *dev, | |
3359 | struct neigh_parms *parms) | |
3360 | { | |
9918d5bf VF |
3361 | /* modify only our neigh_parms */ |
3362 | if (parms->dev == dev) | |
3363 | parms->neigh_setup = bond_neigh_init; | |
00829823 | 3364 | |
00829823 SH |
3365 | return 0; |
3366 | } | |
3367 | ||
1da177e4 LT |
3368 | /* |
3369 | * Change the MTU of all of a master's slaves to match the master | |
3370 | */ | |
3371 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3372 | { | |
454d7c9b | 3373 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 3374 | struct slave *slave, *rollback_slave; |
9caff1e7 | 3375 | struct list_head *iter; |
1da177e4 | 3376 | int res = 0; |
1da177e4 | 3377 | |
5a03cdb7 | 3378 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3379 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3380 | |
3381 | /* Can't hold bond->lock with bh disabled here since | |
3382 | * some base drivers panic. On the other hand we can't | |
3383 | * hold bond->lock without bh disabled because we'll | |
3384 | * deadlock. The only solution is to rely on the fact | |
3385 | * that we're under rtnl_lock here, and the slaves | |
3386 | * list won't change. This doesn't solve the problem | |
3387 | * of setting the slave's MTU while it is | |
3388 | * transmitting, but the assumption is that the base | |
3389 | * driver can handle that. | |
3390 | * | |
3391 | * TODO: figure out a way to safely iterate the slaves | |
3392 | * list, but without holding a lock around the actual | |
3393 | * call to the base driver. | |
3394 | */ | |
3395 | ||
9caff1e7 | 3396 | bond_for_each_slave(bond, slave, iter) { |
c8c23903 | 3397 | pr_debug("s %p c_m %p\n", |
a4aee5c8 | 3398 | slave, |
a4aee5c8 | 3399 | slave->dev->netdev_ops->ndo_change_mtu); |
e944ef79 | 3400 | |
1da177e4 LT |
3401 | res = dev_set_mtu(slave->dev, new_mtu); |
3402 | ||
3403 | if (res) { | |
3404 | /* If we failed to set the slave's mtu to the new value | |
3405 | * we must abort the operation even in ACTIVE_BACKUP | |
3406 | * mode, because if we allow the backup slaves to have | |
3407 | * different mtu values than the active slave we'll | |
3408 | * need to change their mtu when doing a failover. That | |
3409 | * means changing their mtu from timer context, which | |
3410 | * is probably not a good idea. | |
3411 | */ | |
5a03cdb7 | 3412 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3413 | goto unwind; |
3414 | } | |
3415 | } | |
3416 | ||
3417 | bond_dev->mtu = new_mtu; | |
3418 | ||
3419 | return 0; | |
3420 | ||
3421 | unwind: | |
3422 | /* unwind from head to the slave that failed */ | |
9caff1e7 | 3423 | bond_for_each_slave(bond, rollback_slave, iter) { |
1da177e4 LT |
3424 | int tmp_res; |
3425 | ||
81f23b13 VF |
3426 | if (rollback_slave == slave) |
3427 | break; | |
3428 | ||
3429 | tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu); | |
1da177e4 | 3430 | if (tmp_res) { |
a4aee5c8 | 3431 | pr_debug("unwind err %d dev %s\n", |
81f23b13 | 3432 | tmp_res, rollback_slave->dev->name); |
1da177e4 LT |
3433 | } |
3434 | } | |
3435 | ||
3436 | return res; | |
3437 | } | |
3438 | ||
3439 | /* | |
3440 | * Change HW address | |
3441 | * | |
3442 | * Note that many devices must be down to change the HW address, and | |
3443 | * downing the master releases all slaves. We can make bonds full of | |
3444 | * bonding devices to test this, however. | |
3445 | */ | |
3446 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3447 | { | |
454d7c9b | 3448 | struct bonding *bond = netdev_priv(bond_dev); |
81f23b13 | 3449 | struct slave *slave, *rollback_slave; |
1da177e4 | 3450 | struct sockaddr *sa = addr, tmp_sa; |
9caff1e7 | 3451 | struct list_head *iter; |
1da177e4 | 3452 | int res = 0; |
1da177e4 | 3453 | |
eb7cc59a SH |
3454 | if (bond->params.mode == BOND_MODE_ALB) |
3455 | return bond_alb_set_mac_address(bond_dev, addr); | |
3456 | ||
3457 | ||
a4aee5c8 JP |
3458 | pr_debug("bond=%p, name=%s\n", |
3459 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3460 | |
1b5acd29 JV |
3461 | /* If fail_over_mac is enabled, do nothing and return success. |
3462 | * Returning an error causes ifenslave to fail. | |
dd957c57 | 3463 | */ |
1b5acd29 | 3464 | if (bond->params.fail_over_mac) |
dd957c57 | 3465 | return 0; |
2ab82852 | 3466 | |
3d632c3f | 3467 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3468 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3469 | |
3470 | /* Can't hold bond->lock with bh disabled here since | |
3471 | * some base drivers panic. On the other hand we can't | |
3472 | * hold bond->lock without bh disabled because we'll | |
3473 | * deadlock. The only solution is to rely on the fact | |
3474 | * that we're under rtnl_lock here, and the slaves | |
3475 | * list won't change. This doesn't solve the problem | |
3476 | * of setting the slave's hw address while it is | |
3477 | * transmitting, but the assumption is that the base | |
3478 | * driver can handle that. | |
3479 | * | |
3480 | * TODO: figure out a way to safely iterate the slaves | |
3481 | * list, but without holding a lock around the actual | |
3482 | * call to the base driver. | |
3483 | */ | |
3484 | ||
9caff1e7 | 3485 | bond_for_each_slave(bond, slave, iter) { |
eb7cc59a | 3486 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3487 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3488 | |
eb7cc59a | 3489 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3490 | res = -EOPNOTSUPP; |
5a03cdb7 | 3491 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3492 | goto unwind; |
3493 | } | |
3494 | ||
3495 | res = dev_set_mac_address(slave->dev, addr); | |
3496 | if (res) { | |
3497 | /* TODO: consider downing the slave | |
3498 | * and retry ? | |
3499 | * User should expect communications | |
3500 | * breakage anyway until ARP finish | |
3501 | * updating, so... | |
3502 | */ | |
5a03cdb7 | 3503 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3504 | goto unwind; |
3505 | } | |
3506 | } | |
3507 | ||
3508 | /* success */ | |
3509 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3510 | return 0; | |
3511 | ||
3512 | unwind: | |
3513 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3514 | tmp_sa.sa_family = bond_dev->type; | |
3515 | ||
3516 | /* unwind from head to the slave that failed */ | |
9caff1e7 | 3517 | bond_for_each_slave(bond, rollback_slave, iter) { |
1da177e4 LT |
3518 | int tmp_res; |
3519 | ||
81f23b13 VF |
3520 | if (rollback_slave == slave) |
3521 | break; | |
3522 | ||
3523 | tmp_res = dev_set_mac_address(rollback_slave->dev, &tmp_sa); | |
1da177e4 | 3524 | if (tmp_res) { |
a4aee5c8 | 3525 | pr_debug("unwind err %d dev %s\n", |
81f23b13 | 3526 | tmp_res, rollback_slave->dev->name); |
1da177e4 LT |
3527 | } |
3528 | } | |
3529 | ||
3530 | return res; | |
3531 | } | |
3532 | ||
15077228 NA |
3533 | /** |
3534 | * bond_xmit_slave_id - transmit skb through slave with slave_id | |
3535 | * @bond: bonding device that is transmitting | |
3536 | * @skb: buffer to transmit | |
3537 | * @slave_id: slave id up to slave_cnt-1 through which to transmit | |
3538 | * | |
3539 | * This function tries to transmit through slave with slave_id but in case | |
3540 | * it fails, it tries to find the first available slave for transmission. | |
3541 | * The skb is consumed in all cases, thus the function is void. | |
3542 | */ | |
3543 | void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id) | |
3544 | { | |
9caff1e7 | 3545 | struct list_head *iter; |
15077228 NA |
3546 | struct slave *slave; |
3547 | int i = slave_id; | |
3548 | ||
3549 | /* Here we start from the slave with slave_id */ | |
9caff1e7 | 3550 | bond_for_each_slave_rcu(bond, slave, iter) { |
15077228 NA |
3551 | if (--i < 0) { |
3552 | if (slave_can_tx(slave)) { | |
3553 | bond_dev_queue_xmit(bond, skb, slave->dev); | |
3554 | return; | |
3555 | } | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | /* Here we start from the first slave up to slave_id */ | |
3560 | i = slave_id; | |
9caff1e7 | 3561 | bond_for_each_slave_rcu(bond, slave, iter) { |
15077228 NA |
3562 | if (--i < 0) |
3563 | break; | |
3564 | if (slave_can_tx(slave)) { | |
3565 | bond_dev_queue_xmit(bond, skb, slave->dev); | |
3566 | return; | |
3567 | } | |
3568 | } | |
3569 | /* no slave that can tx has been found */ | |
3570 | kfree_skb(skb); | |
3571 | } | |
3572 | ||
73958329 NA |
3573 | /** |
3574 | * bond_rr_gen_slave_id - generate slave id based on packets_per_slave | |
3575 | * @bond: bonding device to use | |
3576 | * | |
3577 | * Based on the value of the bonding device's packets_per_slave parameter | |
3578 | * this function generates a slave id, which is usually used as the next | |
3579 | * slave to transmit through. | |
3580 | */ | |
3581 | static u32 bond_rr_gen_slave_id(struct bonding *bond) | |
3582 | { | |
3583 | int packets_per_slave = bond->params.packets_per_slave; | |
3584 | u32 slave_id; | |
3585 | ||
3586 | switch (packets_per_slave) { | |
3587 | case 0: | |
3588 | slave_id = prandom_u32(); | |
3589 | break; | |
3590 | case 1: | |
3591 | slave_id = bond->rr_tx_counter; | |
3592 | break; | |
3593 | default: | |
3594 | slave_id = reciprocal_divide(bond->rr_tx_counter, | |
3595 | packets_per_slave); | |
3596 | break; | |
3597 | } | |
3598 | bond->rr_tx_counter++; | |
3599 | ||
3600 | return slave_id; | |
3601 | } | |
3602 | ||
1da177e4 LT |
3603 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) |
3604 | { | |
454d7c9b | 3605 | struct bonding *bond = netdev_priv(bond_dev); |
a2fd940f | 3606 | struct iphdr *iph = ip_hdr(skb); |
15077228 | 3607 | struct slave *slave; |
73958329 | 3608 | u32 slave_id; |
1da177e4 | 3609 | |
73958329 | 3610 | /* Start with the curr_active_slave that joined the bond as the |
a2fd940f AG |
3611 | * default for sending IGMP traffic. For failover purposes one |
3612 | * needs to maintain some consistency for the interface that will | |
3613 | * send the join/membership reports. The curr_active_slave found | |
3614 | * will send all of this type of traffic. | |
cf5f9044 | 3615 | */ |
15077228 | 3616 | if (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) { |
278b2083 | 3617 | slave = rcu_dereference(bond->curr_active_slave); |
15077228 NA |
3618 | if (slave && slave_can_tx(slave)) |
3619 | bond_dev_queue_xmit(bond, skb, slave->dev); | |
3620 | else | |
3621 | bond_xmit_slave_id(bond, skb, 0); | |
a2fd940f | 3622 | } else { |
73958329 NA |
3623 | slave_id = bond_rr_gen_slave_id(bond); |
3624 | bond_xmit_slave_id(bond, skb, slave_id % bond->slave_cnt); | |
1da177e4 | 3625 | } |
0693e88e | 3626 | |
ec634fe3 | 3627 | return NETDEV_TX_OK; |
1da177e4 LT |
3628 | } |
3629 | ||
3630 | /* | |
3631 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3632 | * the bond has a usable interface. | |
3633 | */ | |
3634 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3635 | { | |
454d7c9b | 3636 | struct bonding *bond = netdev_priv(bond_dev); |
71bc3b2d | 3637 | struct slave *slave; |
1da177e4 | 3638 | |
278b2083 | 3639 | slave = rcu_dereference(bond->curr_active_slave); |
71bc3b2d | 3640 | if (slave) |
15077228 NA |
3641 | bond_dev_queue_xmit(bond, skb, slave->dev); |
3642 | else | |
04502430 | 3643 | kfree_skb(skb); |
0693e88e | 3644 | |
ec634fe3 | 3645 | return NETDEV_TX_OK; |
1da177e4 LT |
3646 | } |
3647 | ||
32819dc1 | 3648 | /* In bond_xmit_xor() , we determine the output device by using a pre- |
169a3e66 JV |
3649 | * determined xmit_hash_policy(), If the selected device is not enabled, |
3650 | * find the next active slave. | |
1da177e4 LT |
3651 | */ |
3652 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
3653 | { | |
454d7c9b | 3654 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3655 | |
32819dc1 | 3656 | bond_xmit_slave_id(bond, skb, bond_xmit_hash(bond, skb, bond->slave_cnt)); |
0693e88e | 3657 | |
ec634fe3 | 3658 | return NETDEV_TX_OK; |
1da177e4 LT |
3659 | } |
3660 | ||
78a646ce | 3661 | /* in broadcast mode, we send everything to all usable interfaces. */ |
1da177e4 LT |
3662 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) |
3663 | { | |
454d7c9b | 3664 | struct bonding *bond = netdev_priv(bond_dev); |
78a646ce | 3665 | struct slave *slave = NULL; |
9caff1e7 | 3666 | struct list_head *iter; |
1da177e4 | 3667 | |
9caff1e7 | 3668 | bond_for_each_slave_rcu(bond, slave, iter) { |
78a646ce NA |
3669 | if (bond_is_last_slave(bond, slave)) |
3670 | break; | |
3671 | if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP) { | |
3672 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
1da177e4 | 3673 | |
78a646ce NA |
3674 | if (!skb2) { |
3675 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", | |
3676 | bond_dev->name); | |
3677 | continue; | |
1da177e4 | 3678 | } |
78a646ce NA |
3679 | /* bond_dev_queue_xmit always returns 0 */ |
3680 | bond_dev_queue_xmit(bond, skb2, slave->dev); | |
1da177e4 LT |
3681 | } |
3682 | } | |
78a646ce NA |
3683 | if (slave && IS_UP(slave->dev) && slave->link == BOND_LINK_UP) |
3684 | bond_dev_queue_xmit(bond, skb, slave->dev); | |
3685 | else | |
04502430 | 3686 | kfree_skb(skb); |
3d632c3f | 3687 | |
ec634fe3 | 3688 | return NETDEV_TX_OK; |
1da177e4 LT |
3689 | } |
3690 | ||
3691 | /*------------------------- Device initialization ---------------------------*/ | |
3692 | ||
bb1d9123 AG |
3693 | /* |
3694 | * Lookup the slave that corresponds to a qid | |
3695 | */ | |
3696 | static inline int bond_slave_override(struct bonding *bond, | |
3697 | struct sk_buff *skb) | |
3698 | { | |
bb1d9123 AG |
3699 | struct slave *slave = NULL; |
3700 | struct slave *check_slave; | |
9caff1e7 | 3701 | struct list_head *iter; |
dec1e90e | 3702 | int res = 1; |
bb1d9123 | 3703 | |
0693e88e MM |
3704 | if (!skb->queue_mapping) |
3705 | return 1; | |
bb1d9123 AG |
3706 | |
3707 | /* Find out if any slaves have the same mapping as this skb. */ | |
9caff1e7 | 3708 | bond_for_each_slave_rcu(bond, check_slave, iter) { |
bb1d9123 AG |
3709 | if (check_slave->queue_id == skb->queue_mapping) { |
3710 | slave = check_slave; | |
3711 | break; | |
3712 | } | |
3713 | } | |
3714 | ||
3715 | /* If the slave isn't UP, use default transmit policy. */ | |
3716 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
3717 | (slave->link == BOND_LINK_UP)) { | |
3718 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
3719 | } | |
3720 | ||
bb1d9123 AG |
3721 | return res; |
3722 | } | |
3723 | ||
374eeb5a | 3724 | |
bb1d9123 AG |
3725 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
3726 | { | |
3727 | /* | |
3728 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 3729 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
3730 | * skb_tx_hash and will put the skbs in the queue we expect on their |
3731 | * way down to the bonding driver. | |
3732 | */ | |
fd0e435b PO |
3733 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
3734 | ||
374eeb5a NH |
3735 | /* |
3736 | * Save the original txq to restore before passing to the driver | |
3737 | */ | |
df4ab5b3 | 3738 | qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; |
374eeb5a | 3739 | |
fd0e435b | 3740 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 3741 | do { |
fd0e435b | 3742 | txq -= dev->real_num_tx_queues; |
d30ee670 | 3743 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
3744 | } |
3745 | return txq; | |
bb1d9123 AG |
3746 | } |
3747 | ||
0693e88e | 3748 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 3749 | { |
bb1d9123 AG |
3750 | struct bonding *bond = netdev_priv(dev); |
3751 | ||
3752 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
3753 | if (!bond_slave_override(bond, skb)) | |
3754 | return NETDEV_TX_OK; | |
3755 | } | |
00829823 SH |
3756 | |
3757 | switch (bond->params.mode) { | |
3758 | case BOND_MODE_ROUNDROBIN: | |
3759 | return bond_xmit_roundrobin(skb, dev); | |
3760 | case BOND_MODE_ACTIVEBACKUP: | |
3761 | return bond_xmit_activebackup(skb, dev); | |
3762 | case BOND_MODE_XOR: | |
3763 | return bond_xmit_xor(skb, dev); | |
3764 | case BOND_MODE_BROADCAST: | |
3765 | return bond_xmit_broadcast(skb, dev); | |
3766 | case BOND_MODE_8023AD: | |
3767 | return bond_3ad_xmit_xor(skb, dev); | |
3768 | case BOND_MODE_ALB: | |
3769 | case BOND_MODE_TLB: | |
3770 | return bond_alb_xmit(skb, dev); | |
3771 | default: | |
3772 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
3773 | pr_err("%s: Error: Unknown bonding mode %d\n", |
3774 | dev->name, bond->params.mode); | |
00829823 | 3775 | WARN_ON_ONCE(1); |
04502430 | 3776 | kfree_skb(skb); |
00829823 SH |
3777 | return NETDEV_TX_OK; |
3778 | } | |
3779 | } | |
3780 | ||
0693e88e MM |
3781 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
3782 | { | |
3783 | struct bonding *bond = netdev_priv(dev); | |
3784 | netdev_tx_t ret = NETDEV_TX_OK; | |
3785 | ||
3786 | /* | |
3787 | * If we risk deadlock from transmitting this in the | |
3788 | * netpoll path, tell netpoll to queue the frame for later tx | |
3789 | */ | |
3790 | if (is_netpoll_tx_blocked(dev)) | |
3791 | return NETDEV_TX_BUSY; | |
3792 | ||
278b2083 | 3793 | rcu_read_lock(); |
0965a1f3 | 3794 | if (bond_has_slaves(bond)) |
0693e88e MM |
3795 | ret = __bond_start_xmit(skb, dev); |
3796 | else | |
04502430 | 3797 | kfree_skb(skb); |
278b2083 | 3798 | rcu_read_unlock(); |
0693e88e MM |
3799 | |
3800 | return ret; | |
3801 | } | |
00829823 | 3802 | |
bb5b052f AG |
3803 | static int bond_ethtool_get_settings(struct net_device *bond_dev, |
3804 | struct ethtool_cmd *ecmd) | |
3805 | { | |
3806 | struct bonding *bond = netdev_priv(bond_dev); | |
bb5b052f | 3807 | unsigned long speed = 0; |
9caff1e7 | 3808 | struct list_head *iter; |
dec1e90e | 3809 | struct slave *slave; |
bb5b052f AG |
3810 | |
3811 | ecmd->duplex = DUPLEX_UNKNOWN; | |
3812 | ecmd->port = PORT_OTHER; | |
3813 | ||
3814 | /* Since SLAVE_IS_OK returns false for all inactive or down slaves, we | |
3815 | * do not need to check mode. Though link speed might not represent | |
3816 | * the true receive or transmit bandwidth (not all modes are symmetric) | |
3817 | * this is an accurate maximum. | |
3818 | */ | |
3819 | read_lock(&bond->lock); | |
9caff1e7 | 3820 | bond_for_each_slave(bond, slave, iter) { |
bb5b052f AG |
3821 | if (SLAVE_IS_OK(slave)) { |
3822 | if (slave->speed != SPEED_UNKNOWN) | |
3823 | speed += slave->speed; | |
3824 | if (ecmd->duplex == DUPLEX_UNKNOWN && | |
3825 | slave->duplex != DUPLEX_UNKNOWN) | |
3826 | ecmd->duplex = slave->duplex; | |
3827 | } | |
3828 | } | |
3829 | ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN); | |
3830 | read_unlock(&bond->lock); | |
dec1e90e | 3831 | |
bb5b052f AG |
3832 | return 0; |
3833 | } | |
3834 | ||
217df670 | 3835 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
7826d43f | 3836 | struct ethtool_drvinfo *drvinfo) |
217df670 | 3837 | { |
7826d43f JP |
3838 | strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); |
3839 | strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
3840 | snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d", | |
3841 | BOND_ABI_VERSION); | |
217df670 JV |
3842 | } |
3843 | ||
7282d491 | 3844 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 3845 | .get_drvinfo = bond_ethtool_get_drvinfo, |
bb5b052f | 3846 | .get_settings = bond_ethtool_get_settings, |
fa53ebac | 3847 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
3848 | }; |
3849 | ||
eb7cc59a | 3850 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 3851 | .ndo_init = bond_init, |
9e71626c | 3852 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
3853 | .ndo_open = bond_open, |
3854 | .ndo_stop = bond_close, | |
00829823 | 3855 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 3856 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 3857 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 3858 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 3859 | .ndo_change_rx_flags = bond_change_rx_flags, |
303d1cbf | 3860 | .ndo_set_rx_mode = bond_set_rx_mode, |
eb7cc59a | 3861 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 3862 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 3863 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 3864 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 3865 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 3866 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 3867 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
3868 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
3869 | .ndo_poll_controller = bond_poll_controller, | |
3870 | #endif | |
9232ecca JP |
3871 | .ndo_add_slave = bond_enslave, |
3872 | .ndo_del_slave = bond_release, | |
b2a103e6 | 3873 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
3874 | }; |
3875 | ||
b3f92b63 DG |
3876 | static const struct device_type bond_type = { |
3877 | .name = "bond", | |
3878 | }; | |
3879 | ||
9e2e61fb AW |
3880 | static void bond_destructor(struct net_device *bond_dev) |
3881 | { | |
3882 | struct bonding *bond = netdev_priv(bond_dev); | |
3883 | if (bond->wq) | |
3884 | destroy_workqueue(bond->wq); | |
3885 | free_netdev(bond_dev); | |
3886 | } | |
3887 | ||
0a2a78c4 | 3888 | void bond_setup(struct net_device *bond_dev) |
1da177e4 | 3889 | { |
454d7c9b | 3890 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3891 | |
1da177e4 LT |
3892 | /* initialize rwlocks */ |
3893 | rwlock_init(&bond->lock); | |
3894 | rwlock_init(&bond->curr_slave_lock); | |
d2991f75 | 3895 | bond->params = bonding_defaults; |
1da177e4 LT |
3896 | |
3897 | /* Initialize pointers */ | |
1da177e4 | 3898 | bond->dev = bond_dev; |
1da177e4 LT |
3899 | |
3900 | /* Initialize the device entry points */ | |
181470fc | 3901 | ether_setup(bond_dev); |
eb7cc59a | 3902 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 3903 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 | 3904 | |
9e2e61fb | 3905 | bond_dev->destructor = bond_destructor; |
1da177e4 | 3906 | |
b3f92b63 DG |
3907 | SET_NETDEV_DEVTYPE(bond_dev, &bond_type); |
3908 | ||
1da177e4 LT |
3909 | /* Initialize the device options */ |
3910 | bond_dev->tx_queue_len = 0; | |
3911 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 3912 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 3913 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 3914 | |
1da177e4 LT |
3915 | /* At first, we block adding VLANs. That's the only way to |
3916 | * prevent problems that occur when adding VLANs over an | |
3917 | * empty bond. The block will be removed once non-challenged | |
3918 | * slaves are enslaved. | |
3919 | */ | |
3920 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
3921 | ||
932ff279 | 3922 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
3923 | * transmitting */ |
3924 | bond_dev->features |= NETIF_F_LLTX; | |
3925 | ||
3926 | /* By default, we declare the bond to be fully | |
3927 | * VLAN hardware accelerated capable. Special | |
3928 | * care is taken in the various xmit functions | |
3929 | * when there are slaves that are not hw accel | |
3930 | * capable | |
3931 | */ | |
1da177e4 | 3932 | |
b2a103e6 | 3933 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
f646968f PM |
3934 | NETIF_F_HW_VLAN_CTAG_TX | |
3935 | NETIF_F_HW_VLAN_CTAG_RX | | |
3936 | NETIF_F_HW_VLAN_CTAG_FILTER; | |
b2a103e6 | 3937 | |
34324dc2 | 3938 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
b2a103e6 | 3939 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
3940 | } |
3941 | ||
c67dfb29 EB |
3942 | /* |
3943 | * Destroy a bonding device. | |
3944 | * Must be under rtnl_lock when this function is called. | |
3945 | */ | |
3946 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 3947 | { |
454d7c9b | 3948 | struct bonding *bond = netdev_priv(bond_dev); |
544a028e VF |
3949 | struct list_head *iter; |
3950 | struct slave *slave; | |
a434e43f | 3951 | |
f6dc31a8 WC |
3952 | bond_netpoll_cleanup(bond_dev); |
3953 | ||
c67dfb29 | 3954 | /* Release the bonded slaves */ |
544a028e | 3955 | bond_for_each_slave(bond, slave, iter) |
dec1e90e | 3956 | __bond_release_one(bond_dev, slave->dev, true); |
0896341a | 3957 | pr_info("%s: released all slaves\n", bond_dev->name); |
c67dfb29 | 3958 | |
a434e43f JV |
3959 | list_del(&bond->bond_list); |
3960 | ||
f073c7ca | 3961 | bond_debug_unregister(bond); |
a434e43f JV |
3962 | } |
3963 | ||
1da177e4 LT |
3964 | /*------------------------- Module initialization ---------------------------*/ |
3965 | ||
3966 | /* | |
3967 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
3968 | * number of the mode or its string name. A bit complicated because |
3969 | * some mode names are substrings of other names, and calls from sysfs | |
3970 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 3971 | */ |
325dcf7a | 3972 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 3973 | { |
54b87323 | 3974 | int modeint = -1, i, rv; |
a42e534f | 3975 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 3976 | |
a42e534f JV |
3977 | for (p = (char *)buf; *p; p++) |
3978 | if (!(isdigit(*p) || isspace(*p))) | |
3979 | break; | |
3980 | ||
3981 | if (*p) | |
ece95f7f | 3982 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 3983 | else |
54b87323 | 3984 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
3985 | |
3986 | if (!rv) | |
3987 | return -1; | |
1da177e4 LT |
3988 | |
3989 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 3990 | if (modeint == tbl[i].mode) |
ece95f7f JV |
3991 | return tbl[i].mode; |
3992 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 3993 | return tbl[i].mode; |
1da177e4 LT |
3994 | } |
3995 | ||
3996 | return -1; | |
3997 | } | |
3998 | ||
3999 | static int bond_check_params(struct bond_params *params) | |
4000 | { | |
5a5c5fd4 | 4001 | int arp_validate_value, fail_over_mac_value, primary_reselect_value, i; |
8599b52e | 4002 | int arp_all_targets_value; |
f5b2b966 | 4003 | |
1da177e4 LT |
4004 | /* |
4005 | * Convert string parameters. | |
4006 | */ | |
4007 | if (mode) { | |
4008 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4009 | if (bond_mode == -1) { | |
a4aee5c8 | 4010 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4011 | mode == NULL ? "NULL" : mode); |
4012 | return -EINVAL; | |
4013 | } | |
4014 | } | |
4015 | ||
169a3e66 JV |
4016 | if (xmit_hash_policy) { |
4017 | if ((bond_mode != BOND_MODE_XOR) && | |
4018 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4019 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4020 | bond_mode_name(bond_mode)); |
4021 | } else { | |
4022 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4023 | xmit_hashtype_tbl); | |
4024 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4025 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4026 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4027 | xmit_hash_policy); |
4028 | return -EINVAL; | |
4029 | } | |
4030 | } | |
4031 | } | |
4032 | ||
1da177e4 LT |
4033 | if (lacp_rate) { |
4034 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4035 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4036 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4037 | } else { |
4038 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4039 | if (lacp_fast == -1) { | |
a4aee5c8 | 4040 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4041 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4042 | return -EINVAL; | |
4043 | } | |
4044 | } | |
4045 | } | |
4046 | ||
fd989c83 JV |
4047 | if (ad_select) { |
4048 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4049 | if (params->ad_select == -1) { | |
a4aee5c8 | 4050 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4051 | ad_select == NULL ? "NULL" : ad_select); |
4052 | return -EINVAL; | |
4053 | } | |
4054 | ||
4055 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4056 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4057 | } |
4058 | } else { | |
4059 | params->ad_select = BOND_AD_STABLE; | |
4060 | } | |
4061 | ||
f5841306 | 4062 | if (max_bonds < 0) { |
a4aee5c8 JP |
4063 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4064 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4065 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4066 | } | |
4067 | ||
4068 | if (miimon < 0) { | |
a4aee5c8 JP |
4069 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4070 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4071 | miimon = BOND_LINK_MON_INTERV; |
4072 | } | |
4073 | ||
4074 | if (updelay < 0) { | |
a4aee5c8 JP |
4075 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4076 | updelay, INT_MAX); | |
1da177e4 LT |
4077 | updelay = 0; |
4078 | } | |
4079 | ||
4080 | if (downdelay < 0) { | |
a4aee5c8 JP |
4081 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4082 | downdelay, INT_MAX); | |
1da177e4 LT |
4083 | downdelay = 0; |
4084 | } | |
4085 | ||
4086 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4087 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4088 | use_carrier); | |
1da177e4 LT |
4089 | use_carrier = 1; |
4090 | } | |
4091 | ||
ad246c99 BH |
4092 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4093 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4094 | num_peer_notif); | |
4095 | num_peer_notif = 1; | |
4096 | } | |
4097 | ||
1da177e4 LT |
4098 | /* reset values for 802.3ad */ |
4099 | if (bond_mode == BOND_MODE_8023AD) { | |
4100 | if (!miimon) { | |
a4aee5c8 | 4101 | pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n"); |
3d632c3f | 4102 | pr_warning("Forcing miimon to 100msec\n"); |
fe9d04af | 4103 | miimon = BOND_DEFAULT_MIIMON; |
1da177e4 LT |
4104 | } |
4105 | } | |
4106 | ||
bb1d9123 AG |
4107 | if (tx_queues < 1 || tx_queues > 255) { |
4108 | pr_warning("Warning: tx_queues (%d) should be between " | |
4109 | "1 and 255, resetting to %d\n", | |
4110 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4111 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4112 | } | |
4113 | ||
ebd8e497 AG |
4114 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4115 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4116 | "not of valid value (0/1), so it was set to " | |
4117 | "0\n", all_slaves_active); | |
4118 | all_slaves_active = 0; | |
4119 | } | |
4120 | ||
c2952c31 FL |
4121 | if (resend_igmp < 0 || resend_igmp > 255) { |
4122 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4123 | "0 and 255, resetting to %d\n", | |
4124 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4125 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4126 | } | |
4127 | ||
73958329 NA |
4128 | if (packets_per_slave < 0 || packets_per_slave > USHRT_MAX) { |
4129 | pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n", | |
4130 | packets_per_slave, USHRT_MAX); | |
4131 | packets_per_slave = 1; | |
4132 | } | |
4133 | ||
1da177e4 LT |
4134 | /* reset values for TLB/ALB */ |
4135 | if ((bond_mode == BOND_MODE_TLB) || | |
4136 | (bond_mode == BOND_MODE_ALB)) { | |
4137 | if (!miimon) { | |
a4aee5c8 | 4138 | pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n"); |
3d632c3f | 4139 | pr_warning("Forcing miimon to 100msec\n"); |
fe9d04af | 4140 | miimon = BOND_DEFAULT_MIIMON; |
1da177e4 LT |
4141 | } |
4142 | } | |
4143 | ||
4144 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4145 | 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", |
4146 | updelay); | |
1da177e4 LT |
4147 | } |
4148 | ||
4149 | if (!miimon) { | |
4150 | if (updelay || downdelay) { | |
4151 | /* just warn the user the up/down delay will have | |
4152 | * no effect since miimon is zero... | |
4153 | */ | |
a4aee5c8 JP |
4154 | pr_warning("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", |
4155 | updelay, downdelay); | |
1da177e4 LT |
4156 | } |
4157 | } else { | |
4158 | /* don't allow arp monitoring */ | |
4159 | if (arp_interval) { | |
a4aee5c8 JP |
4160 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4161 | miimon, arp_interval); | |
1da177e4 LT |
4162 | arp_interval = 0; |
4163 | } | |
4164 | ||
4165 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4166 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4167 | updelay, miimon, | |
4168 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4169 | } |
4170 | ||
4171 | updelay /= miimon; | |
4172 | ||
4173 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4174 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4175 | downdelay, miimon, | |
4176 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4177 | } |
4178 | ||
4179 | downdelay /= miimon; | |
4180 | } | |
4181 | ||
4182 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4183 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4184 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4185 | arp_interval = BOND_LINK_ARP_INTERV; |
4186 | } | |
4187 | ||
5a5c5fd4 | 4188 | for (arp_ip_count = 0, i = 0; |
4189 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) { | |
1da177e4 LT |
4190 | /* not complete check, but should be good enough to |
4191 | catch mistakes */ | |
89015c18 | 4192 | __be32 ip; |
4193 | if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) || | |
4194 | IS_IP_TARGET_UNUSABLE_ADDRESS(ip)) { | |
a4aee5c8 | 4195 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
5a5c5fd4 | 4196 | arp_ip_target[i]); |
1da177e4 LT |
4197 | arp_interval = 0; |
4198 | } else { | |
0afee4e8 VF |
4199 | if (bond_get_targets_ip(arp_target, ip) == -1) |
4200 | arp_target[arp_ip_count++] = ip; | |
4201 | else | |
4202 | pr_warning("Warning: duplicate address %pI4 in arp_ip_target, skipping\n", | |
4203 | &ip); | |
1da177e4 LT |
4204 | } |
4205 | } | |
4206 | ||
4207 | if (arp_interval && !arp_ip_count) { | |
4208 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4209 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4210 | arp_interval); | |
1da177e4 LT |
4211 | arp_interval = 0; |
4212 | } | |
4213 | ||
f5b2b966 JV |
4214 | if (arp_validate) { |
4215 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4216 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4217 | return -EINVAL; |
4218 | } | |
4219 | if (!arp_interval) { | |
a4aee5c8 | 4220 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4221 | return -EINVAL; |
4222 | } | |
4223 | ||
4224 | arp_validate_value = bond_parse_parm(arp_validate, | |
4225 | arp_validate_tbl); | |
4226 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4227 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4228 | arp_validate == NULL ? "NULL" : arp_validate); |
4229 | return -EINVAL; | |
4230 | } | |
4231 | } else | |
4232 | arp_validate_value = 0; | |
4233 | ||
8599b52e VF |
4234 | arp_all_targets_value = 0; |
4235 | if (arp_all_targets) { | |
4236 | arp_all_targets_value = bond_parse_parm(arp_all_targets, | |
4237 | arp_all_targets_tbl); | |
4238 | ||
4239 | if (arp_all_targets_value == -1) { | |
4240 | pr_err("Error: invalid arp_all_targets_value \"%s\"\n", | |
4241 | arp_all_targets); | |
4242 | arp_all_targets_value = 0; | |
4243 | } | |
4244 | } | |
4245 | ||
1da177e4 | 4246 | if (miimon) { |
a4aee5c8 | 4247 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 | 4248 | } else if (arp_interval) { |
a4aee5c8 JP |
4249 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4250 | arp_interval, | |
4251 | arp_validate_tbl[arp_validate_value].modename, | |
4252 | arp_ip_count); | |
1da177e4 LT |
4253 | |
4254 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4255 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4256 | |
e5e2a8fd | 4257 | pr_info("\n"); |
1da177e4 | 4258 | |
b8a9787e | 4259 | } else if (max_bonds) { |
1da177e4 LT |
4260 | /* miimon and arp_interval not set, we need one so things |
4261 | * work as expected, see bonding.txt for details | |
4262 | */ | |
b2730f4f | 4263 | 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 |
4264 | } |
4265 | ||
4266 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4267 | /* currently, using a primary only makes sense | |
4268 | * in active backup, TLB or ALB modes | |
4269 | */ | |
a4aee5c8 JP |
4270 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4271 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4272 | primary = NULL; |
4273 | } | |
4274 | ||
a549952a JP |
4275 | if (primary && primary_reselect) { |
4276 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4277 | pri_reselect_tbl); | |
4278 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4279 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4280 | primary_reselect == |
4281 | NULL ? "NULL" : primary_reselect); | |
4282 | return -EINVAL; | |
4283 | } | |
4284 | } else { | |
4285 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4286 | } | |
4287 | ||
3915c1e8 JV |
4288 | if (fail_over_mac) { |
4289 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4290 | fail_over_mac_tbl); | |
4291 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4292 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4293 | arp_validate == NULL ? "NULL" : arp_validate); |
4294 | return -EINVAL; | |
4295 | } | |
4296 | ||
4297 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4298 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4299 | } else { |
4300 | fail_over_mac_value = BOND_FOM_NONE; | |
4301 | } | |
dd957c57 | 4302 | |
1da177e4 LT |
4303 | /* fill params struct with the proper values */ |
4304 | params->mode = bond_mode; | |
169a3e66 | 4305 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4306 | params->miimon = miimon; |
ad246c99 | 4307 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4308 | params->arp_interval = arp_interval; |
f5b2b966 | 4309 | params->arp_validate = arp_validate_value; |
8599b52e | 4310 | params->arp_all_targets = arp_all_targets_value; |
1da177e4 LT |
4311 | params->updelay = updelay; |
4312 | params->downdelay = downdelay; | |
4313 | params->use_carrier = use_carrier; | |
4314 | params->lacp_fast = lacp_fast; | |
4315 | params->primary[0] = 0; | |
a549952a | 4316 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4317 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4318 | params->tx_queues = tx_queues; |
ebd8e497 | 4319 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4320 | params->resend_igmp = resend_igmp; |
655f8919 | 4321 | params->min_links = min_links; |
7eacd038 | 4322 | params->lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL; |
73958329 NA |
4323 | if (packets_per_slave > 1) |
4324 | params->packets_per_slave = reciprocal_value(packets_per_slave); | |
4325 | else | |
4326 | params->packets_per_slave = packets_per_slave; | |
1da177e4 LT |
4327 | if (primary) { |
4328 | strncpy(params->primary, primary, IFNAMSIZ); | |
4329 | params->primary[IFNAMSIZ - 1] = 0; | |
4330 | } | |
4331 | ||
4332 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4333 | ||
4334 | return 0; | |
4335 | } | |
4336 | ||
0daa2303 | 4337 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4338 | static struct lock_class_key bonding_netdev_addr_lock_key; |
49ee4920 | 4339 | static struct lock_class_key bonding_tx_busylock_key; |
0daa2303 | 4340 | |
e8a0464c DM |
4341 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4342 | struct netdev_queue *txq, | |
4343 | void *_unused) | |
c773e847 DM |
4344 | { |
4345 | lockdep_set_class(&txq->_xmit_lock, | |
4346 | &bonding_netdev_xmit_lock_key); | |
4347 | } | |
4348 | ||
4349 | static void bond_set_lockdep_class(struct net_device *dev) | |
4350 | { | |
cf508b12 DM |
4351 | lockdep_set_class(&dev->addr_list_lock, |
4352 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4353 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
49ee4920 | 4354 | dev->qdisc_tx_busylock = &bonding_tx_busylock_key; |
c773e847 DM |
4355 | } |
4356 | ||
181470fc SH |
4357 | /* |
4358 | * Called from registration process | |
4359 | */ | |
4360 | static int bond_init(struct net_device *bond_dev) | |
4361 | { | |
4362 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4363 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4364 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4365 | |
4366 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4367 | ||
9fe0617d NH |
4368 | /* |
4369 | * Initialize locks that may be required during | |
4370 | * en/deslave operations. All of the bond_open work | |
4371 | * (of which this is part) should really be moved to | |
4372 | * a phase prior to dev_open | |
4373 | */ | |
4374 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4375 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4376 | ||
181470fc SH |
4377 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4378 | if (!bond->wq) | |
4379 | return -ENOMEM; | |
4380 | ||
4381 | bond_set_lockdep_class(bond_dev); | |
4382 | ||
ec87fd3b | 4383 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4384 | |
6151b3d4 | 4385 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4386 | |
f073c7ca TI |
4387 | bond_debug_register(bond); |
4388 | ||
409cc1f8 JP |
4389 | /* Ensure valid dev_addr */ |
4390 | if (is_zero_ether_addr(bond_dev->dev_addr) && | |
97a1e639 | 4391 | bond_dev->addr_assign_type == NET_ADDR_PERM) |
409cc1f8 | 4392 | eth_hw_addr_random(bond_dev); |
409cc1f8 | 4393 | |
181470fc SH |
4394 | return 0; |
4395 | } | |
4396 | ||
0a2a78c4 | 4397 | unsigned int bond_get_num_tx_queues(void) |
d5da4510 | 4398 | { |
efacb309 | 4399 | return tx_queues; |
d5da4510 JP |
4400 | } |
4401 | ||
dfe60397 | 4402 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4403 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4404 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4405 | * set up our sysfs entries. | |
4406 | */ | |
ec87fd3b | 4407 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4408 | { |
4409 | struct net_device *bond_dev; | |
4410 | int res; | |
4411 | ||
4412 | rtnl_lock(); | |
027ea041 | 4413 | |
1c5cae81 JP |
4414 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4415 | name ? name : "bond%d", | |
4416 | bond_setup, tx_queues); | |
dfe60397 | 4417 | if (!bond_dev) { |
a4aee5c8 | 4418 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4419 | rtnl_unlock(); |
4420 | return -ENOMEM; | |
dfe60397 MW |
4421 | } |
4422 | ||
ec87fd3b | 4423 | dev_net_set(bond_dev, net); |
88ead977 EB |
4424 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4425 | ||
dfe60397 | 4426 | res = register_netdevice(bond_dev); |
0daa2303 | 4427 | |
e826eafa PO |
4428 | netif_carrier_off(bond_dev); |
4429 | ||
7e083840 | 4430 | rtnl_unlock(); |
9e2e61fb AW |
4431 | if (res < 0) |
4432 | bond_destructor(bond_dev); | |
30c15ba9 | 4433 | return res; |
dfe60397 MW |
4434 | } |
4435 | ||
2c8c1e72 | 4436 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4437 | { |
15449745 | 4438 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4439 | |
4440 | bn->net = net; | |
4441 | INIT_LIST_HEAD(&bn->dev_list); | |
4442 | ||
ec87fd3b | 4443 | bond_create_proc_dir(bn); |
4c22400a | 4444 | bond_create_sysfs(bn); |
87a7b84b | 4445 | |
15449745 | 4446 | return 0; |
ec87fd3b EB |
4447 | } |
4448 | ||
2c8c1e72 | 4449 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4450 | { |
15449745 | 4451 | struct bond_net *bn = net_generic(net, bond_net_id); |
69b0216a | 4452 | struct bonding *bond, *tmp_bond; |
4453 | LIST_HEAD(list); | |
ec87fd3b | 4454 | |
4c22400a | 4455 | bond_destroy_sysfs(bn); |
ec87fd3b | 4456 | bond_destroy_proc_dir(bn); |
69b0216a | 4457 | |
4458 | /* Kill off any bonds created after unregistering bond rtnl ops */ | |
4459 | rtnl_lock(); | |
4460 | list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list) | |
4461 | unregister_netdevice_queue(bond->dev, &list); | |
4462 | unregister_netdevice_many(&list); | |
4463 | rtnl_unlock(); | |
ec87fd3b EB |
4464 | } |
4465 | ||
4466 | static struct pernet_operations bond_net_ops = { | |
4467 | .init = bond_net_init, | |
4468 | .exit = bond_net_exit, | |
15449745 EB |
4469 | .id = &bond_net_id, |
4470 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4471 | }; |
4472 | ||
1da177e4 LT |
4473 | static int __init bonding_init(void) |
4474 | { | |
1da177e4 LT |
4475 | int i; |
4476 | int res; | |
4477 | ||
bd33acc3 | 4478 | pr_info("%s", bond_version); |
1da177e4 | 4479 | |
dfe60397 | 4480 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4481 | if (res) |
dfe60397 | 4482 | goto out; |
1da177e4 | 4483 | |
15449745 | 4484 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4485 | if (res) |
4486 | goto out; | |
027ea041 | 4487 | |
0a2a78c4 | 4488 | res = bond_netlink_init(); |
88ead977 | 4489 | if (res) |
6639104b | 4490 | goto err_link; |
88ead977 | 4491 | |
f073c7ca TI |
4492 | bond_create_debugfs(); |
4493 | ||
1da177e4 | 4494 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4495 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4496 | if (res) |
4497 | goto err; | |
1da177e4 LT |
4498 | } |
4499 | ||
1da177e4 | 4500 | register_netdevice_notifier(&bond_netdev_notifier); |
dfe60397 | 4501 | out: |
1da177e4 | 4502 | return res; |
88ead977 | 4503 | err: |
0a2a78c4 | 4504 | bond_netlink_fini(); |
6639104b | 4505 | err_link: |
15449745 | 4506 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4507 | goto out; |
dfe60397 | 4508 | |
1da177e4 LT |
4509 | } |
4510 | ||
4511 | static void __exit bonding_exit(void) | |
4512 | { | |
4513 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
4514 | ||
f073c7ca | 4515 | bond_destroy_debugfs(); |
ae68c398 | 4516 | |
0a2a78c4 | 4517 | bond_netlink_fini(); |
ffcdedb6 | 4518 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4519 | |
4520 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4521 | /* |
4522 | * Make sure we don't have an imbalance on our netpoll blocking | |
4523 | */ | |
4524 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4525 | #endif |
1da177e4 LT |
4526 | } |
4527 | ||
4528 | module_init(bonding_init); | |
4529 | module_exit(bonding_exit); | |
4530 | MODULE_LICENSE("GPL"); | |
4531 | MODULE_VERSION(DRV_VERSION); | |
4532 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4533 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); |