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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
1da177e4 LT |
34 | #include <linux/kernel.h> |
35 | #include <linux/module.h> | |
1da177e4 LT |
36 | #include <linux/types.h> |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/ptrace.h> | |
40 | #include <linux/ioport.h> | |
41 | #include <linux/in.h> | |
169a3e66 | 42 | #include <net/ip.h> |
1da177e4 | 43 | #include <linux/ip.h> |
169a3e66 JV |
44 | #include <linux/tcp.h> |
45 | #include <linux/udp.h> | |
1da177e4 LT |
46 | #include <linux/slab.h> |
47 | #include <linux/string.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/socket.h> | |
51 | #include <linux/ctype.h> | |
52 | #include <linux/inet.h> | |
53 | #include <linux/bitops.h> | |
3d632c3f | 54 | #include <linux/io.h> |
1da177e4 | 55 | #include <asm/system.h> |
1da177e4 | 56 | #include <asm/dma.h> |
3d632c3f | 57 | #include <linux/uaccess.h> |
1da177e4 LT |
58 | #include <linux/errno.h> |
59 | #include <linux/netdevice.h> | |
60 | #include <linux/inetdevice.h> | |
a816c7c7 | 61 | #include <linux/igmp.h> |
1da177e4 LT |
62 | #include <linux/etherdevice.h> |
63 | #include <linux/skbuff.h> | |
64 | #include <net/sock.h> | |
65 | #include <linux/rtnetlink.h> | |
66 | #include <linux/proc_fs.h> | |
67 | #include <linux/seq_file.h> | |
68 | #include <linux/smp.h> | |
69 | #include <linux/if_ether.h> | |
70 | #include <net/arp.h> | |
71 | #include <linux/mii.h> | |
72 | #include <linux/ethtool.h> | |
73 | #include <linux/if_vlan.h> | |
74 | #include <linux/if_bonding.h> | |
b63bb739 | 75 | #include <linux/jiffies.h> |
c3ade5ca | 76 | #include <net/route.h> |
457c4cbc | 77 | #include <net/net_namespace.h> |
1da177e4 LT |
78 | #include "bonding.h" |
79 | #include "bond_3ad.h" | |
80 | #include "bond_alb.h" | |
81 | ||
82 | /*---------------------------- Module parameters ----------------------------*/ | |
83 | ||
84 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
85 | #define BOND_LINK_MON_INTERV 0 | |
86 | #define BOND_LINK_ARP_INTERV 0 | |
87 | ||
88 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
7893b249 | 89 | static int num_grat_arp = 1; |
305d552a | 90 | static int num_unsol_na = 1; |
1da177e4 | 91 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
92 | static int updelay; |
93 | static int downdelay; | |
1da177e4 | 94 | static int use_carrier = 1; |
3d632c3f SH |
95 | static char *mode; |
96 | static char *primary; | |
97 | static char *lacp_rate; | |
98 | static char *ad_select; | |
99 | static char *xmit_hash_policy; | |
1da177e4 | 100 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
101 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
102 | static char *arp_validate; | |
103 | static char *fail_over_mac; | |
d2991f75 | 104 | static struct bond_params bonding_defaults; |
1da177e4 LT |
105 | |
106 | module_param(max_bonds, int, 0); | |
107 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
7893b249 MS |
108 | module_param(num_grat_arp, int, 0644); |
109 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
305d552a BH |
110 | module_param(num_unsol_na, int, 0644); |
111 | MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event"); | |
1da177e4 LT |
112 | module_param(miimon, int, 0); |
113 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
114 | module_param(updelay, int, 0); | |
115 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
116 | module_param(downdelay, int, 0); | |
2ac47660 MW |
117 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
118 | "in milliseconds"); | |
1da177e4 | 119 | module_param(use_carrier, int, 0); |
2ac47660 MW |
120 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
121 | "0 for off, 1 for on (default)"); | |
1da177e4 | 122 | module_param(mode, charp, 0); |
2ac47660 MW |
123 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
124 | "1 for active-backup, 2 for balance-xor, " | |
125 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
126 | "6 for balance-alb"); | |
1da177e4 LT |
127 | module_param(primary, charp, 0); |
128 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
129 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
130 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
131 | "(slow/fast)"); | |
fd989c83 JV |
132 | module_param(ad_select, charp, 0); |
133 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 134 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
135 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
136 | ", 1 for layer 3+4"); | |
1da177e4 LT |
137 | module_param(arp_interval, int, 0); |
138 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
139 | module_param_array(arp_ip_target, charp, NULL, 0); | |
140 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
141 | module_param(arp_validate, charp, 0); |
142 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
143 | module_param(fail_over_mac, charp, 0); |
144 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
1da177e4 LT |
145 | |
146 | /*----------------------------- Global variables ----------------------------*/ | |
147 | ||
f71e1309 | 148 | static const char * const version = |
1da177e4 LT |
149 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
150 | ||
12479f9a | 151 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
152 | |
153 | #ifdef CONFIG_PROC_FS | |
3d632c3f | 154 | static struct proc_dir_entry *bond_proc_dir; |
1da177e4 LT |
155 | #endif |
156 | ||
3d632c3f SH |
157 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
158 | static int arp_ip_count; | |
1da177e4 | 159 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
160 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
161 | static int lacp_fast; | |
217df670 | 162 | |
1da177e4 | 163 | |
e97fd7c6 | 164 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
165 | { "slow", AD_LACP_SLOW}, |
166 | { "fast", AD_LACP_FAST}, | |
167 | { NULL, -1}, | |
168 | }; | |
169 | ||
e97fd7c6 | 170 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
171 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
172 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
173 | { "balance-xor", BOND_MODE_XOR}, | |
174 | { "broadcast", BOND_MODE_BROADCAST}, | |
175 | { "802.3ad", BOND_MODE_8023AD}, | |
176 | { "balance-tlb", BOND_MODE_TLB}, | |
177 | { "balance-alb", BOND_MODE_ALB}, | |
178 | { NULL, -1}, | |
179 | }; | |
180 | ||
e97fd7c6 | 181 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
182 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
183 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 184 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
185 | { NULL, -1}, |
186 | }; | |
187 | ||
e97fd7c6 | 188 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
189 | { "none", BOND_ARP_VALIDATE_NONE}, |
190 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
191 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
192 | { "all", BOND_ARP_VALIDATE_ALL}, | |
193 | { NULL, -1}, | |
194 | }; | |
195 | ||
e97fd7c6 | 196 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
197 | { "none", BOND_FOM_NONE}, |
198 | { "active", BOND_FOM_ACTIVE}, | |
199 | { "follow", BOND_FOM_FOLLOW}, | |
200 | { NULL, -1}, | |
201 | }; | |
202 | ||
fd989c83 JV |
203 | struct bond_parm_tbl ad_select_tbl[] = { |
204 | { "stable", BOND_AD_STABLE}, | |
205 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
206 | { "count", BOND_AD_COUNT}, | |
207 | { NULL, -1}, | |
208 | }; | |
209 | ||
1da177e4 LT |
210 | /*-------------------------- Forward declarations ---------------------------*/ |
211 | ||
c3ade5ca | 212 | static void bond_send_gratuitous_arp(struct bonding *bond); |
181470fc | 213 | static int bond_init(struct net_device *bond_dev); |
c50b85d0 | 214 | static void bond_deinit(struct net_device *bond_dev); |
1da177e4 LT |
215 | |
216 | /*---------------------------- General routines -----------------------------*/ | |
217 | ||
4ad072c9 | 218 | static const char *bond_mode_name(int mode) |
1da177e4 | 219 | { |
77afc92b HE |
220 | static const char *names[] = { |
221 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
222 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
223 | [BOND_MODE_XOR] = "load balancing (xor)", | |
224 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 225 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
226 | [BOND_MODE_TLB] = "transmit load balancing", |
227 | [BOND_MODE_ALB] = "adaptive load balancing", | |
228 | }; | |
229 | ||
230 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 231 | return "unknown"; |
77afc92b HE |
232 | |
233 | return names[mode]; | |
1da177e4 LT |
234 | } |
235 | ||
236 | /*---------------------------------- VLAN -----------------------------------*/ | |
237 | ||
238 | /** | |
239 | * bond_add_vlan - add a new vlan id on bond | |
240 | * @bond: bond that got the notification | |
241 | * @vlan_id: the vlan id to add | |
242 | * | |
243 | * Returns -ENOMEM if allocation failed. | |
244 | */ | |
245 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
246 | { | |
247 | struct vlan_entry *vlan; | |
248 | ||
5a03cdb7 | 249 | pr_debug("bond: %s, vlan id %d\n", |
3d632c3f | 250 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 251 | |
305d552a | 252 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 253 | if (!vlan) |
1da177e4 | 254 | return -ENOMEM; |
1da177e4 LT |
255 | |
256 | INIT_LIST_HEAD(&vlan->vlan_list); | |
257 | vlan->vlan_id = vlan_id; | |
258 | ||
259 | write_lock_bh(&bond->lock); | |
260 | ||
261 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
262 | ||
263 | write_unlock_bh(&bond->lock); | |
264 | ||
5a03cdb7 | 265 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
270 | /** | |
271 | * bond_del_vlan - delete a vlan id from bond | |
272 | * @bond: bond that got the notification | |
273 | * @vlan_id: the vlan id to delete | |
274 | * | |
275 | * returns -ENODEV if @vlan_id was not found in @bond. | |
276 | */ | |
277 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
278 | { | |
0883beca | 279 | struct vlan_entry *vlan; |
1da177e4 LT |
280 | int res = -ENODEV; |
281 | ||
5a03cdb7 | 282 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 LT |
283 | |
284 | write_lock_bh(&bond->lock); | |
285 | ||
0883beca | 286 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
287 | if (vlan->vlan_id == vlan_id) { |
288 | list_del(&vlan->vlan_list); | |
289 | ||
58402054 | 290 | if (bond_is_lb(bond)) |
1da177e4 | 291 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 292 | |
5a03cdb7 | 293 | pr_debug("removed VLAN ID %d from bond %s\n", vlan_id, |
1da177e4 LT |
294 | bond->dev->name); |
295 | ||
296 | kfree(vlan); | |
297 | ||
298 | if (list_empty(&bond->vlan_list) && | |
299 | (bond->slave_cnt == 0)) { | |
300 | /* Last VLAN removed and no slaves, so | |
301 | * restore block on adding VLANs. This will | |
302 | * be removed once new slaves that are not | |
303 | * VLAN challenged will be added. | |
304 | */ | |
305 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
306 | } | |
307 | ||
308 | res = 0; | |
309 | goto out; | |
310 | } | |
311 | } | |
312 | ||
5a03cdb7 | 313 | pr_debug("couldn't find VLAN ID %d in bond %s\n", vlan_id, |
1da177e4 LT |
314 | bond->dev->name); |
315 | ||
316 | out: | |
317 | write_unlock_bh(&bond->lock); | |
318 | return res; | |
319 | } | |
320 | ||
321 | /** | |
322 | * bond_has_challenged_slaves | |
323 | * @bond: the bond we're working on | |
324 | * | |
325 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
326 | * was found, 0 otherwise. | |
327 | * | |
328 | * Assumes bond->lock is held. | |
329 | */ | |
330 | static int bond_has_challenged_slaves(struct bonding *bond) | |
331 | { | |
332 | struct slave *slave; | |
333 | int i; | |
334 | ||
335 | bond_for_each_slave(bond, slave, i) { | |
336 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 337 | pr_debug("found VLAN challenged slave - %s\n", |
1da177e4 LT |
338 | slave->dev->name); |
339 | return 1; | |
340 | } | |
341 | } | |
342 | ||
5a03cdb7 | 343 | pr_debug("no VLAN challenged slaves found\n"); |
1da177e4 LT |
344 | return 0; |
345 | } | |
346 | ||
347 | /** | |
348 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
349 | * @bond: the bond we're working on | |
350 | * @curr: item we're advancing from | |
351 | * | |
352 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
353 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 354 | * |
1da177e4 LT |
355 | * Caller must hold bond->lock |
356 | */ | |
357 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
358 | { | |
359 | struct vlan_entry *next, *last; | |
360 | ||
3d632c3f | 361 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 362 | return NULL; |
1da177e4 LT |
363 | |
364 | if (!curr) { | |
365 | next = list_entry(bond->vlan_list.next, | |
366 | struct vlan_entry, vlan_list); | |
367 | } else { | |
368 | last = list_entry(bond->vlan_list.prev, | |
369 | struct vlan_entry, vlan_list); | |
370 | if (last == curr) { | |
371 | next = list_entry(bond->vlan_list.next, | |
372 | struct vlan_entry, vlan_list); | |
373 | } else { | |
374 | next = list_entry(curr->vlan_list.next, | |
375 | struct vlan_entry, vlan_list); | |
376 | } | |
377 | } | |
378 | ||
379 | return next; | |
380 | } | |
381 | ||
382 | /** | |
383 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 384 | * |
1da177e4 LT |
385 | * @bond: bond device that got this skb for tx. |
386 | * @skb: hw accel VLAN tagged skb to transmit | |
387 | * @slave_dev: slave that is supposed to xmit this skbuff | |
3d632c3f | 388 | * |
1da177e4 LT |
389 | * When the bond gets an skb to transmit that is |
390 | * already hardware accelerated VLAN tagged, and it | |
391 | * needs to relay this skb to a slave that is not | |
392 | * hw accel capable, the skb needs to be "unaccelerated", | |
393 | * i.e. strip the hwaccel tag and re-insert it as part | |
394 | * of the payload. | |
395 | */ | |
3d632c3f SH |
396 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
397 | struct net_device *slave_dev) | |
1da177e4 | 398 | { |
966bc6f4 | 399 | unsigned short uninitialized_var(vlan_id); |
1da177e4 LT |
400 | |
401 | if (!list_empty(&bond->vlan_list) && | |
402 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
403 | vlan_get_tag(skb, &vlan_id) == 0) { | |
404 | skb->dev = slave_dev; | |
405 | skb = vlan_put_tag(skb, vlan_id); | |
406 | if (!skb) { | |
407 | /* vlan_put_tag() frees the skb in case of error, | |
408 | * so return success here so the calling functions | |
409 | * won't attempt to free is again. | |
410 | */ | |
411 | return 0; | |
412 | } | |
413 | } else { | |
414 | skb->dev = slave_dev; | |
415 | } | |
416 | ||
417 | skb->priority = 1; | |
418 | dev_queue_xmit(skb); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | /* | |
424 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
425 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
426 | * lock because: | |
427 | * a. This operation is performed in IOCTL context, | |
428 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
429 | * c. Holding a lock with BH disabled while directly calling a base driver | |
430 | * entry point is generally a BAD idea. | |
3d632c3f | 431 | * |
1da177e4 LT |
432 | * The design of synchronization/protection for this operation in the 8021q |
433 | * module is good for one or more VLAN devices over a single physical device | |
434 | * and cannot be extended for a teaming solution like bonding, so there is a | |
435 | * potential race condition here where a net device from the vlan group might | |
436 | * be referenced (either by a base driver or the 8021q code) while it is being | |
437 | * removed from the system. However, it turns out we're not making matters | |
438 | * worse, and if it works for regular VLAN usage it will work here too. | |
439 | */ | |
440 | ||
441 | /** | |
442 | * bond_vlan_rx_register - Propagates registration to slaves | |
443 | * @bond_dev: bonding net device that got called | |
444 | * @grp: vlan group being registered | |
445 | */ | |
3d632c3f SH |
446 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
447 | struct vlan_group *grp) | |
1da177e4 | 448 | { |
454d7c9b | 449 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
450 | struct slave *slave; |
451 | int i; | |
452 | ||
453 | bond->vlgrp = grp; | |
454 | ||
455 | bond_for_each_slave(bond, slave, i) { | |
456 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 457 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
458 | |
459 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
460 | slave_ops->ndo_vlan_rx_register) { |
461 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
462 | } |
463 | } | |
464 | } | |
465 | ||
466 | /** | |
467 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
468 | * @bond_dev: bonding net device that got called | |
469 | * @vid: vlan id being added | |
470 | */ | |
471 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
472 | { | |
454d7c9b | 473 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
474 | struct slave *slave; |
475 | int i, res; | |
476 | ||
477 | bond_for_each_slave(bond, slave, i) { | |
478 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 479 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
480 | |
481 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
482 | slave_ops->ndo_vlan_rx_add_vid) { |
483 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
484 | } |
485 | } | |
486 | ||
487 | res = bond_add_vlan(bond, vid); | |
488 | if (res) { | |
3d632c3f | 489 | pr_err(DRV_NAME |
4e0952c7 | 490 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
491 | bond_dev->name, vid); |
492 | } | |
493 | } | |
494 | ||
495 | /** | |
496 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
497 | * @bond_dev: bonding net device that got called | |
498 | * @vid: vlan id being removed | |
499 | */ | |
500 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
501 | { | |
454d7c9b | 502 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
503 | struct slave *slave; |
504 | struct net_device *vlan_dev; | |
505 | int i, res; | |
506 | ||
507 | bond_for_each_slave(bond, slave, i) { | |
508 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 509 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
510 | |
511 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 512 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
513 | /* Save and then restore vlan_dev in the grp array, |
514 | * since the slave's driver might clear it. | |
515 | */ | |
5c15bdec | 516 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 517 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 518 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
519 | } |
520 | } | |
521 | ||
522 | res = bond_del_vlan(bond, vid); | |
523 | if (res) { | |
3d632c3f | 524 | pr_err(DRV_NAME |
4e0952c7 | 525 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
526 | bond_dev->name, vid); |
527 | } | |
528 | } | |
529 | ||
530 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
531 | { | |
532 | struct vlan_entry *vlan; | |
eb7cc59a | 533 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
534 | |
535 | write_lock_bh(&bond->lock); | |
536 | ||
eb7cc59a | 537 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 538 | goto out; |
1da177e4 LT |
539 | |
540 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
541 | slave_ops->ndo_vlan_rx_register) |
542 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
543 | |
544 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 545 | !(slave_ops->ndo_vlan_rx_add_vid)) |
1da177e4 | 546 | goto out; |
1da177e4 | 547 | |
eb7cc59a SH |
548 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
549 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
550 | |
551 | out: | |
552 | write_unlock_bh(&bond->lock); | |
553 | } | |
554 | ||
3d632c3f SH |
555 | static void bond_del_vlans_from_slave(struct bonding *bond, |
556 | struct net_device *slave_dev) | |
1da177e4 | 557 | { |
eb7cc59a | 558 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
559 | struct vlan_entry *vlan; |
560 | struct net_device *vlan_dev; | |
561 | ||
562 | write_lock_bh(&bond->lock); | |
563 | ||
eb7cc59a | 564 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 565 | goto out; |
1da177e4 LT |
566 | |
567 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 568 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 569 | goto unreg; |
1da177e4 LT |
570 | |
571 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
572 | /* Save and then restore vlan_dev in the grp array, | |
573 | * since the slave's driver might clear it. | |
574 | */ | |
5c15bdec | 575 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 576 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 577 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
578 | } |
579 | ||
580 | unreg: | |
581 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
582 | slave_ops->ndo_vlan_rx_register) |
583 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
584 | |
585 | out: | |
586 | write_unlock_bh(&bond->lock); | |
587 | } | |
588 | ||
589 | /*------------------------------- Link status -------------------------------*/ | |
590 | ||
ff59c456 JV |
591 | /* |
592 | * Set the carrier state for the master according to the state of its | |
593 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
594 | * do special 802.3ad magic. | |
595 | * | |
596 | * Returns zero if carrier state does not change, nonzero if it does. | |
597 | */ | |
598 | static int bond_set_carrier(struct bonding *bond) | |
599 | { | |
600 | struct slave *slave; | |
601 | int i; | |
602 | ||
603 | if (bond->slave_cnt == 0) | |
604 | goto down; | |
605 | ||
606 | if (bond->params.mode == BOND_MODE_8023AD) | |
607 | return bond_3ad_set_carrier(bond); | |
608 | ||
609 | bond_for_each_slave(bond, slave, i) { | |
610 | if (slave->link == BOND_LINK_UP) { | |
611 | if (!netif_carrier_ok(bond->dev)) { | |
612 | netif_carrier_on(bond->dev); | |
613 | return 1; | |
614 | } | |
615 | return 0; | |
616 | } | |
617 | } | |
618 | ||
619 | down: | |
620 | if (netif_carrier_ok(bond->dev)) { | |
621 | netif_carrier_off(bond->dev); | |
622 | return 1; | |
623 | } | |
624 | return 0; | |
625 | } | |
626 | ||
1da177e4 LT |
627 | /* |
628 | * Get link speed and duplex from the slave's base driver | |
629 | * using ethtool. If for some reason the call fails or the | |
630 | * values are invalid, fake speed and duplex to 100/Full | |
631 | * and return error. | |
632 | */ | |
633 | static int bond_update_speed_duplex(struct slave *slave) | |
634 | { | |
635 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 636 | struct ethtool_cmd etool; |
61a44b9c | 637 | int res; |
1da177e4 LT |
638 | |
639 | /* Fake speed and duplex */ | |
640 | slave->speed = SPEED_100; | |
641 | slave->duplex = DUPLEX_FULL; | |
642 | ||
61a44b9c MW |
643 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
644 | return -1; | |
1da177e4 | 645 | |
61a44b9c MW |
646 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
647 | if (res < 0) | |
1da177e4 | 648 | return -1; |
1da177e4 | 649 | |
1da177e4 LT |
650 | switch (etool.speed) { |
651 | case SPEED_10: | |
652 | case SPEED_100: | |
653 | case SPEED_1000: | |
94dbffd5 | 654 | case SPEED_10000: |
1da177e4 LT |
655 | break; |
656 | default: | |
657 | return -1; | |
658 | } | |
659 | ||
660 | switch (etool.duplex) { | |
661 | case DUPLEX_FULL: | |
662 | case DUPLEX_HALF: | |
663 | break; | |
664 | default: | |
665 | return -1; | |
666 | } | |
667 | ||
668 | slave->speed = etool.speed; | |
669 | slave->duplex = etool.duplex; | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | /* | |
675 | * if <dev> supports MII link status reporting, check its link status. | |
676 | * | |
677 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 678 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
679 | * |
680 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
681 | * can't tell and just pretend it is), or 0, meaning that the link is | |
682 | * down. | |
683 | * | |
684 | * If reporting is non-zero, instead of faking link up, return -1 if | |
685 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
686 | * support them). If use_carrier is set, return whatever it says. | |
687 | * It'd be nice if there was a good way to tell if a driver supports | |
688 | * netif_carrier, but there really isn't. | |
689 | */ | |
3d632c3f SH |
690 | static int bond_check_dev_link(struct bonding *bond, |
691 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 692 | { |
eb7cc59a | 693 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
3d632c3f | 694 | static int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
695 | struct ifreq ifr; |
696 | struct mii_ioctl_data *mii; | |
1da177e4 | 697 | |
6c988853 PG |
698 | if (!reporting && !netif_running(slave_dev)) |
699 | return 0; | |
700 | ||
eb7cc59a | 701 | if (bond->params.use_carrier) |
1da177e4 | 702 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 703 | |
29112f4e JP |
704 | /* Try to get link status using Ethtool first. */ |
705 | if (slave_dev->ethtool_ops) { | |
706 | if (slave_dev->ethtool_ops->get_link) { | |
707 | u32 link; | |
708 | ||
709 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
710 | ||
711 | return link ? BMSR_LSTATUS : 0; | |
712 | } | |
713 | } | |
714 | ||
3d632c3f | 715 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 716 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
717 | if (ioctl) { |
718 | /* TODO: set pointer to correct ioctl on a per team member */ | |
719 | /* bases to make this more efficient. that is, once */ | |
720 | /* we determine the correct ioctl, we will always */ | |
721 | /* call it and not the others for that team */ | |
722 | /* member. */ | |
723 | ||
724 | /* | |
725 | * We cannot assume that SIOCGMIIPHY will also read a | |
726 | * register; not all network drivers (e.g., e100) | |
727 | * support that. | |
728 | */ | |
729 | ||
730 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
731 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
732 | mii = if_mii(&ifr); | |
733 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
734 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
735 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
736 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
737 | } |
738 | } | |
739 | ||
1da177e4 LT |
740 | /* |
741 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 742 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
743 | * cannot report link status). If not reporting, pretend |
744 | * we're ok. | |
745 | */ | |
3d632c3f | 746 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
747 | } |
748 | ||
749 | /*----------------------------- Multicast list ------------------------------*/ | |
750 | ||
751 | /* | |
752 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
753 | */ | |
3d632c3f SH |
754 | static inline int bond_is_dmi_same(const struct dev_mc_list *dmi1, |
755 | const struct dev_mc_list *dmi2) | |
1da177e4 LT |
756 | { |
757 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
758 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
759 | } | |
760 | ||
761 | /* | |
762 | * returns dmi entry if found, NULL otherwise | |
763 | */ | |
3d632c3f SH |
764 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, |
765 | struct dev_mc_list *mc_list) | |
1da177e4 LT |
766 | { |
767 | struct dev_mc_list *idmi; | |
768 | ||
769 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
3d632c3f | 770 | if (bond_is_dmi_same(dmi, idmi)) |
1da177e4 | 771 | return idmi; |
1da177e4 LT |
772 | } |
773 | ||
774 | return NULL; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Push the promiscuity flag down to appropriate slaves | |
779 | */ | |
7e1a1ac1 | 780 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 781 | { |
7e1a1ac1 | 782 | int err = 0; |
1da177e4 LT |
783 | if (USES_PRIMARY(bond->params.mode)) { |
784 | /* write lock already acquired */ | |
785 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
786 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
787 | inc); | |
1da177e4 LT |
788 | } |
789 | } else { | |
790 | struct slave *slave; | |
791 | int i; | |
792 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
793 | err = dev_set_promiscuity(slave->dev, inc); |
794 | if (err) | |
795 | return err; | |
1da177e4 LT |
796 | } |
797 | } | |
7e1a1ac1 | 798 | return err; |
1da177e4 LT |
799 | } |
800 | ||
801 | /* | |
802 | * Push the allmulti flag down to all slaves | |
803 | */ | |
7e1a1ac1 | 804 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 805 | { |
7e1a1ac1 | 806 | int err = 0; |
1da177e4 LT |
807 | if (USES_PRIMARY(bond->params.mode)) { |
808 | /* write lock already acquired */ | |
809 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
810 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
811 | inc); | |
1da177e4 LT |
812 | } |
813 | } else { | |
814 | struct slave *slave; | |
815 | int i; | |
816 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
817 | err = dev_set_allmulti(slave->dev, inc); |
818 | if (err) | |
819 | return err; | |
1da177e4 LT |
820 | } |
821 | } | |
7e1a1ac1 | 822 | return err; |
1da177e4 LT |
823 | } |
824 | ||
825 | /* | |
826 | * Add a Multicast address to slaves | |
827 | * according to mode | |
828 | */ | |
829 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
830 | { | |
831 | if (USES_PRIMARY(bond->params.mode)) { | |
832 | /* write lock already acquired */ | |
3d632c3f | 833 | if (bond->curr_active_slave) |
1da177e4 | 834 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); |
1da177e4 LT |
835 | } else { |
836 | struct slave *slave; | |
837 | int i; | |
3d632c3f SH |
838 | |
839 | bond_for_each_slave(bond, slave, i) | |
1da177e4 | 840 | dev_mc_add(slave->dev, addr, alen, 0); |
1da177e4 LT |
841 | } |
842 | } | |
843 | ||
844 | /* | |
845 | * Remove a multicast address from slave | |
846 | * according to mode | |
847 | */ | |
848 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
849 | { | |
850 | if (USES_PRIMARY(bond->params.mode)) { | |
851 | /* write lock already acquired */ | |
3d632c3f SH |
852 | if (bond->curr_active_slave) |
853 | dev_mc_delete(bond->curr_active_slave->dev, addr, | |
854 | alen, 0); | |
1da177e4 LT |
855 | } else { |
856 | struct slave *slave; | |
857 | int i; | |
858 | bond_for_each_slave(bond, slave, i) { | |
859 | dev_mc_delete(slave->dev, addr, alen, 0); | |
860 | } | |
861 | } | |
862 | } | |
863 | ||
a816c7c7 JV |
864 | |
865 | /* | |
866 | * Retrieve the list of registered multicast addresses for the bonding | |
867 | * device and retransmit an IGMP JOIN request to the current active | |
868 | * slave. | |
869 | */ | |
870 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
871 | { | |
872 | struct in_device *in_dev; | |
873 | struct ip_mc_list *im; | |
874 | ||
875 | rcu_read_lock(); | |
876 | in_dev = __in_dev_get_rcu(bond->dev); | |
877 | if (in_dev) { | |
3d632c3f | 878 | for (im = in_dev->mc_list; im; im = im->next) |
a816c7c7 | 879 | ip_mc_rejoin_group(im); |
a816c7c7 JV |
880 | } |
881 | ||
882 | rcu_read_unlock(); | |
883 | } | |
884 | ||
1da177e4 LT |
885 | /* |
886 | * Totally destroys the mc_list in bond | |
887 | */ | |
888 | static void bond_mc_list_destroy(struct bonding *bond) | |
889 | { | |
890 | struct dev_mc_list *dmi; | |
891 | ||
892 | dmi = bond->mc_list; | |
893 | while (dmi) { | |
894 | bond->mc_list = dmi->next; | |
895 | kfree(dmi); | |
896 | dmi = bond->mc_list; | |
897 | } | |
3d632c3f SH |
898 | |
899 | bond->mc_list = NULL; | |
1da177e4 LT |
900 | } |
901 | ||
902 | /* | |
903 | * Copy all the Multicast addresses from src to the bonding device dst | |
904 | */ | |
de54f390 | 905 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 906 | gfp_t gfp_flag) |
1da177e4 LT |
907 | { |
908 | struct dev_mc_list *dmi, *new_dmi; | |
909 | ||
910 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 911 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
912 | |
913 | if (!new_dmi) { | |
914 | /* FIXME: Potential memory leak !!! */ | |
915 | return -ENOMEM; | |
916 | } | |
917 | ||
918 | new_dmi->next = bond->mc_list; | |
919 | bond->mc_list = new_dmi; | |
920 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
921 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
922 | new_dmi->dmi_users = dmi->dmi_users; | |
923 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
924 | } | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | /* | |
930 | * flush all members of flush->mc_list from device dev->mc_list | |
931 | */ | |
3d632c3f SH |
932 | static void bond_mc_list_flush(struct net_device *bond_dev, |
933 | struct net_device *slave_dev) | |
1da177e4 | 934 | { |
454d7c9b | 935 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
936 | struct dev_mc_list *dmi; |
937 | ||
3d632c3f | 938 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) |
1da177e4 | 939 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); |
1da177e4 LT |
940 | |
941 | if (bond->params.mode == BOND_MODE_8023AD) { | |
942 | /* del lacpdu mc addr from mc list */ | |
943 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
944 | ||
945 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
946 | } | |
947 | } | |
948 | ||
949 | /*--------------------------- Active slave change ---------------------------*/ | |
950 | ||
951 | /* | |
952 | * Update the mc list and multicast-related flags for the new and | |
953 | * old active slaves (if any) according to the multicast mode, and | |
954 | * promiscuous flags unconditionally. | |
955 | */ | |
3d632c3f SH |
956 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
957 | struct slave *old_active) | |
1da177e4 LT |
958 | { |
959 | struct dev_mc_list *dmi; | |
960 | ||
3d632c3f | 961 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
962 | /* nothing to do - mc list is already up-to-date on |
963 | * all slaves | |
964 | */ | |
965 | return; | |
1da177e4 LT |
966 | |
967 | if (old_active) { | |
3d632c3f | 968 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 969 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 970 | |
3d632c3f | 971 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 972 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 973 | |
3d632c3f SH |
974 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) |
975 | dev_mc_delete(old_active->dev, dmi->dmi_addr, | |
976 | dmi->dmi_addrlen, 0); | |
1da177e4 LT |
977 | } |
978 | ||
979 | if (new_active) { | |
7e1a1ac1 | 980 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 981 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 982 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 983 | |
3d632c3f | 984 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 985 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 986 | |
3d632c3f SH |
987 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) |
988 | dev_mc_add(new_active->dev, dmi->dmi_addr, | |
989 | dmi->dmi_addrlen, 0); | |
a816c7c7 | 990 | bond_resend_igmp_join_requests(bond); |
1da177e4 LT |
991 | } |
992 | } | |
993 | ||
3915c1e8 JV |
994 | /* |
995 | * bond_do_fail_over_mac | |
996 | * | |
997 | * Perform special MAC address swapping for fail_over_mac settings | |
998 | * | |
999 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
1000 | */ | |
1001 | static void bond_do_fail_over_mac(struct bonding *bond, | |
1002 | struct slave *new_active, | |
1003 | struct slave *old_active) | |
1f78d9f9 HE |
1004 | __releases(&bond->curr_slave_lock) |
1005 | __releases(&bond->lock) | |
1006 | __acquires(&bond->lock) | |
1007 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
1008 | { |
1009 | u8 tmp_mac[ETH_ALEN]; | |
1010 | struct sockaddr saddr; | |
1011 | int rv; | |
1012 | ||
1013 | switch (bond->params.fail_over_mac) { | |
1014 | case BOND_FOM_ACTIVE: | |
1015 | if (new_active) | |
1016 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
1017 | new_active->dev->addr_len); | |
1018 | break; | |
1019 | case BOND_FOM_FOLLOW: | |
1020 | /* | |
1021 | * if new_active && old_active, swap them | |
1022 | * if just old_active, do nothing (going to no active slave) | |
1023 | * if just new_active, set new_active to bond's MAC | |
1024 | */ | |
1025 | if (!new_active) | |
1026 | return; | |
1027 | ||
1028 | write_unlock_bh(&bond->curr_slave_lock); | |
1029 | read_unlock(&bond->lock); | |
1030 | ||
1031 | if (old_active) { | |
1032 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
1033 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
1034 | ETH_ALEN); | |
1035 | saddr.sa_family = new_active->dev->type; | |
1036 | } else { | |
1037 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
1038 | saddr.sa_family = bond->dev->type; | |
1039 | } | |
1040 | ||
1041 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
1042 | if (rv) { | |
3d632c3f | 1043 | pr_err(DRV_NAME |
3915c1e8 JV |
1044 | ": %s: Error %d setting MAC of slave %s\n", |
1045 | bond->dev->name, -rv, new_active->dev->name); | |
1046 | goto out; | |
1047 | } | |
1048 | ||
1049 | if (!old_active) | |
1050 | goto out; | |
1051 | ||
1052 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1053 | saddr.sa_family = old_active->dev->type; | |
1054 | ||
1055 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1056 | if (rv) | |
3d632c3f | 1057 | pr_err(DRV_NAME |
3915c1e8 JV |
1058 | ": %s: Error %d setting MAC of slave %s\n", |
1059 | bond->dev->name, -rv, new_active->dev->name); | |
1060 | out: | |
1061 | read_lock(&bond->lock); | |
1062 | write_lock_bh(&bond->curr_slave_lock); | |
1063 | break; | |
1064 | default: | |
3d632c3f | 1065 | pr_err(DRV_NAME |
3915c1e8 JV |
1066 | ": %s: bond_do_fail_over_mac impossible: bad policy %d\n", |
1067 | bond->dev->name, bond->params.fail_over_mac); | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | } | |
1072 | ||
1073 | ||
1da177e4 LT |
1074 | /** |
1075 | * find_best_interface - select the best available slave to be the active one | |
1076 | * @bond: our bonding struct | |
1077 | * | |
1078 | * Warning: Caller must hold curr_slave_lock for writing. | |
1079 | */ | |
1080 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1081 | { | |
1082 | struct slave *new_active, *old_active; | |
1083 | struct slave *bestslave = NULL; | |
1084 | int mintime = bond->params.updelay; | |
1085 | int i; | |
1086 | ||
1087 | new_active = old_active = bond->curr_active_slave; | |
1088 | ||
1089 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1090 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1091 | new_active = bond->first_slave; |
3d632c3f | 1092 | else |
1da177e4 | 1093 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1094 | } |
1095 | ||
3d632c3f SH |
1096 | /* |
1097 | * first try the primary link; if arping, a link must tx/rx | |
1098 | * traffic before it can be considered the curr_active_slave. | |
1099 | * also, we would skip slaves between the curr_active_slave | |
1100 | * and primary_slave that may be up and able to arp | |
1da177e4 LT |
1101 | */ |
1102 | if ((bond->primary_slave) && | |
1103 | (!bond->params.arp_interval) && | |
1104 | (IS_UP(bond->primary_slave->dev))) { | |
1105 | new_active = bond->primary_slave; | |
1106 | } | |
1107 | ||
1108 | /* remember where to stop iterating over the slaves */ | |
1109 | old_active = new_active; | |
1110 | ||
1111 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1112 | if (IS_UP(new_active->dev)) { | |
1113 | if (new_active->link == BOND_LINK_UP) { | |
1114 | return new_active; | |
1115 | } else if (new_active->link == BOND_LINK_BACK) { | |
1116 | /* link up, but waiting for stabilization */ | |
1117 | if (new_active->delay < mintime) { | |
1118 | mintime = new_active->delay; | |
1119 | bestslave = new_active; | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | return bestslave; | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * change_active_interface - change the active slave into the specified one | |
1130 | * @bond: our bonding struct | |
1131 | * @new: the new slave to make the active one | |
1132 | * | |
1133 | * Set the new slave to the bond's settings and unset them on the old | |
1134 | * curr_active_slave. | |
1135 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1136 | * | |
1137 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1138 | * because it is apparently the best available slave we have, even though its | |
1139 | * updelay hasn't timed out yet. | |
1140 | * | |
3915c1e8 JV |
1141 | * If new_active is not NULL, caller must hold bond->lock for read and |
1142 | * curr_slave_lock for write_bh. | |
1da177e4 | 1143 | */ |
a77b5325 | 1144 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1145 | { |
1146 | struct slave *old_active = bond->curr_active_slave; | |
1147 | ||
3d632c3f | 1148 | if (old_active == new_active) |
1da177e4 | 1149 | return; |
1da177e4 LT |
1150 | |
1151 | if (new_active) { | |
b2220cad JV |
1152 | new_active->jiffies = jiffies; |
1153 | ||
1da177e4 LT |
1154 | if (new_active->link == BOND_LINK_BACK) { |
1155 | if (USES_PRIMARY(bond->params.mode)) { | |
3d632c3f | 1156 | pr_info(DRV_NAME |
1da177e4 LT |
1157 | ": %s: making interface %s the new " |
1158 | "active one %d ms earlier.\n", | |
1159 | bond->dev->name, new_active->dev->name, | |
1160 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1161 | } | |
1162 | ||
1163 | new_active->delay = 0; | |
1164 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1165 | |
3d632c3f | 1166 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1167 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1168 | |
58402054 | 1169 | if (bond_is_lb(bond)) |
1da177e4 | 1170 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1171 | } else { |
1172 | if (USES_PRIMARY(bond->params.mode)) { | |
3d632c3f | 1173 | pr_info(DRV_NAME |
1da177e4 LT |
1174 | ": %s: making interface %s the new " |
1175 | "active one.\n", | |
1176 | bond->dev->name, new_active->dev->name); | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | ||
3d632c3f | 1181 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1182 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1183 | |
58402054 | 1184 | if (bond_is_lb(bond)) { |
1da177e4 | 1185 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1186 | if (old_active) |
1187 | bond_set_slave_inactive_flags(old_active); | |
1188 | if (new_active) | |
1189 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1190 | } else { |
1191 | bond->curr_active_slave = new_active; | |
1192 | } | |
c3ade5ca JV |
1193 | |
1194 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1195 | if (old_active) |
c3ade5ca | 1196 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1197 | |
1198 | if (new_active) { | |
1199 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1200 | |
709f8a45 OG |
1201 | if (bond->params.fail_over_mac) |
1202 | bond_do_fail_over_mac(bond, new_active, | |
1203 | old_active); | |
3915c1e8 | 1204 | |
709f8a45 | 1205 | bond->send_grat_arp = bond->params.num_grat_arp; |
b59f9f74 | 1206 | bond_send_gratuitous_arp(bond); |
01f3109d | 1207 | |
305d552a BH |
1208 | bond->send_unsol_na = bond->params.num_unsol_na; |
1209 | bond_send_unsolicited_na(bond); | |
1210 | ||
01f3109d OG |
1211 | write_unlock_bh(&bond->curr_slave_lock); |
1212 | read_unlock(&bond->lock); | |
1213 | ||
75c78500 | 1214 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
01f3109d OG |
1215 | |
1216 | read_lock(&bond->lock); | |
1217 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1218 | } |
c3ade5ca | 1219 | } |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | /** | |
1223 | * bond_select_active_slave - select a new active slave, if needed | |
1224 | * @bond: our bonding struct | |
1225 | * | |
3d632c3f | 1226 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1227 | * - The old curr_active_slave has been released or lost its link. |
1228 | * - The primary_slave has got its link back. | |
1229 | * - A slave has got its link back and there's no old curr_active_slave. | |
1230 | * | |
3915c1e8 | 1231 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1232 | */ |
a77b5325 | 1233 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1234 | { |
1235 | struct slave *best_slave; | |
ff59c456 | 1236 | int rv; |
1da177e4 LT |
1237 | |
1238 | best_slave = bond_find_best_slave(bond); | |
1239 | if (best_slave != bond->curr_active_slave) { | |
1240 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1241 | rv = bond_set_carrier(bond); |
1242 | if (!rv) | |
1243 | return; | |
1244 | ||
1245 | if (netif_carrier_ok(bond->dev)) { | |
3d632c3f | 1246 | pr_info(DRV_NAME |
ff59c456 JV |
1247 | ": %s: first active interface up!\n", |
1248 | bond->dev->name); | |
1249 | } else { | |
3d632c3f | 1250 | pr_info(DRV_NAME ": %s: " |
ff59c456 JV |
1251 | "now running without any active interface !\n", |
1252 | bond->dev->name); | |
1253 | } | |
1da177e4 LT |
1254 | } |
1255 | } | |
1256 | ||
1257 | /*--------------------------- slave list handling ---------------------------*/ | |
1258 | ||
1259 | /* | |
1260 | * This function attaches the slave to the end of list. | |
1261 | * | |
1262 | * bond->lock held for writing by caller. | |
1263 | */ | |
1264 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1265 | { | |
1266 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1267 | new_slave->next = new_slave; | |
1268 | new_slave->prev = new_slave; | |
1269 | bond->first_slave = new_slave; | |
1270 | } else { | |
1271 | new_slave->next = bond->first_slave; | |
1272 | new_slave->prev = bond->first_slave->prev; | |
1273 | new_slave->next->prev = new_slave; | |
1274 | new_slave->prev->next = new_slave; | |
1275 | } | |
1276 | ||
1277 | bond->slave_cnt++; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * This function detaches the slave from the list. | |
1282 | * WARNING: no check is made to verify if the slave effectively | |
1283 | * belongs to <bond>. | |
1284 | * Nothing is freed on return, structures are just unchained. | |
1285 | * If any slave pointer in bond was pointing to <slave>, | |
1286 | * it should be changed by the calling function. | |
1287 | * | |
1288 | * bond->lock held for writing by caller. | |
1289 | */ | |
1290 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1291 | { | |
3d632c3f | 1292 | if (slave->next) |
1da177e4 | 1293 | slave->next->prev = slave->prev; |
1da177e4 | 1294 | |
3d632c3f | 1295 | if (slave->prev) |
1da177e4 | 1296 | slave->prev->next = slave->next; |
1da177e4 LT |
1297 | |
1298 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1299 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1300 | bond->first_slave = slave->next; | |
1301 | } else { | |
1302 | bond->first_slave = NULL; /* slave was the last one */ | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | slave->next = NULL; | |
1307 | slave->prev = NULL; | |
1308 | bond->slave_cnt--; | |
1309 | } | |
1310 | ||
1311 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1312 | ||
4ad072c9 AB |
1313 | static int bond_sethwaddr(struct net_device *bond_dev, |
1314 | struct net_device *slave_dev) | |
1da177e4 | 1315 | { |
5a03cdb7 HE |
1316 | pr_debug("bond_dev=%p\n", bond_dev); |
1317 | pr_debug("slave_dev=%p\n", slave_dev); | |
1318 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1319 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1320 | return 0; | |
1321 | } | |
1322 | ||
7f353bf2 HX |
1323 | #define BOND_VLAN_FEATURES \ |
1324 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1325 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff | 1326 | |
3d632c3f | 1327 | /* |
8e3babcd | 1328 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1329 | * feature bits are managed elsewhere, so preserve those feature bits |
1330 | * on the master device. | |
8531c5ff AK |
1331 | */ |
1332 | static int bond_compute_features(struct bonding *bond) | |
1333 | { | |
8531c5ff AK |
1334 | struct slave *slave; |
1335 | struct net_device *bond_dev = bond->dev; | |
7f353bf2 | 1336 | unsigned long features = bond_dev->features; |
278339a4 | 1337 | unsigned long vlan_features = 0; |
3158bf7d MS |
1338 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1339 | bond_dev->hard_header_len); | |
8e3babcd | 1340 | int i; |
8531c5ff | 1341 | |
7f353bf2 | 1342 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
b63365a2 HX |
1343 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; |
1344 | ||
1345 | if (!bond->first_slave) | |
1346 | goto done; | |
1347 | ||
1348 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1349 | |
278339a4 | 1350 | vlan_features = bond->first_slave->dev->vlan_features; |
54ef3137 | 1351 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1352 | features = netdev_increment_features(features, |
1353 | slave->dev->features, | |
1354 | NETIF_F_ONE_FOR_ALL); | |
278339a4 JV |
1355 | vlan_features = netdev_increment_features(vlan_features, |
1356 | slave->dev->vlan_features, | |
1357 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1358 | if (slave->dev->hard_header_len > max_hard_header_len) |
1359 | max_hard_header_len = slave->dev->hard_header_len; | |
1360 | } | |
8531c5ff | 1361 | |
b63365a2 | 1362 | done: |
7f353bf2 | 1363 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
b63365a2 | 1364 | bond_dev->features = netdev_fix_features(features, NULL); |
278339a4 | 1365 | bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL); |
54ef3137 | 1366 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1367 | |
1368 | return 0; | |
1369 | } | |
1370 | ||
872254dd MS |
1371 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1372 | struct net_device *slave_dev) | |
1373 | { | |
454d7c9b | 1374 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1375 | |
00829823 | 1376 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1377 | |
1378 | bond_dev->type = slave_dev->type; | |
1379 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1380 | bond_dev->addr_len = slave_dev->addr_len; | |
1381 | ||
1382 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1383 | slave_dev->addr_len); | |
d90a162a | 1384 | bond->setup_by_slave = 1; |
872254dd MS |
1385 | } |
1386 | ||
1da177e4 | 1387 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1388 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1389 | { |
454d7c9b | 1390 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1391 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
1392 | struct slave *new_slave = NULL; |
1393 | struct dev_mc_list *dmi; | |
1394 | struct sockaddr addr; | |
1395 | int link_reporting; | |
1396 | int old_features = bond_dev->features; | |
1397 | int res = 0; | |
1398 | ||
552709d5 | 1399 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1400 | slave_ops->ndo_do_ioctl == NULL) { |
3d632c3f | 1401 | pr_warning(DRV_NAME |
4e0952c7 MW |
1402 | ": %s: Warning: no link monitoring support for %s\n", |
1403 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1404 | } |
1405 | ||
1406 | /* bond must be initialized by bond_open() before enslaving */ | |
1407 | if (!(bond_dev->flags & IFF_UP)) { | |
3d632c3f | 1408 | pr_warning(DRV_NAME |
6b1bf096 MS |
1409 | " %s: master_dev is not up in bond_enslave\n", |
1410 | bond_dev->name); | |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | /* already enslaved */ | |
1414 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1415 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1416 | return -EBUSY; |
1417 | } | |
1418 | ||
1419 | /* vlan challenged mutual exclusion */ | |
1420 | /* no need to lock since we're protected by rtnl_lock */ | |
1421 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1422 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 | 1423 | if (!list_empty(&bond->vlan_list)) { |
3d632c3f | 1424 | pr_err(DRV_NAME |
4e0952c7 | 1425 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1426 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1427 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1428 | bond_dev->name); |
1429 | return -EPERM; | |
1430 | } else { | |
3d632c3f | 1431 | pr_warning(DRV_NAME |
4e0952c7 | 1432 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1433 | "slave %s. Adding VLANs will be blocked as " |
1434 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1435 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1436 | bond_dev->name); |
1437 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1438 | } | |
1439 | } else { | |
5a03cdb7 | 1440 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1441 | if (bond->slave_cnt == 0) { |
1442 | /* First slave, and it is not VLAN challenged, | |
1443 | * so remove the block of adding VLANs over the bond. | |
1444 | */ | |
1445 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1446 | } | |
1447 | } | |
1448 | ||
217df670 JV |
1449 | /* |
1450 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1451 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1452 | * the current ifenslave will set the interface down prior to |
1453 | * enslaving it; the old ifenslave will not. | |
1454 | */ | |
1455 | if ((slave_dev->flags & IFF_UP)) { | |
3d632c3f | 1456 | pr_err(DRV_NAME ": %s is up. " |
217df670 JV |
1457 | "This may be due to an out of date ifenslave.\n", |
1458 | slave_dev->name); | |
1459 | res = -EPERM; | |
1460 | goto err_undo_flags; | |
1461 | } | |
1da177e4 | 1462 | |
872254dd MS |
1463 | /* set bonding device ether type by slave - bonding netdevices are |
1464 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1465 | * there is a need to override some of the type dependent attribs/funcs. | |
1466 | * | |
1467 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1468 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1469 | */ | |
1470 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1471 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 MS |
1472 | pr_debug("%s: change device type from %d to %d\n", |
1473 | bond_dev->name, bond_dev->type, slave_dev->type); | |
75c78500 MS |
1474 | |
1475 | netdev_bonding_change(bond_dev, NETDEV_BONDING_OLDTYPE); | |
1476 | ||
e36b9d16 MS |
1477 | if (slave_dev->type != ARPHRD_ETHER) |
1478 | bond_setup_by_slave(bond_dev, slave_dev); | |
1479 | else | |
1480 | ether_setup(bond_dev); | |
75c78500 MS |
1481 | |
1482 | netdev_bonding_change(bond_dev, NETDEV_BONDING_NEWTYPE); | |
e36b9d16 | 1483 | } |
872254dd | 1484 | } else if (bond_dev->type != slave_dev->type) { |
3d632c3f | 1485 | pr_err(DRV_NAME ": %s ether type (%d) is different " |
872254dd MS |
1486 | "from other slaves (%d), can not enslave it.\n", |
1487 | slave_dev->name, | |
1488 | slave_dev->type, bond_dev->type); | |
1489 | res = -EINVAL; | |
1490 | goto err_undo_flags; | |
1491 | } | |
1492 | ||
eb7cc59a | 1493 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1494 | if (bond->slave_cnt == 0) { |
3d632c3f | 1495 | pr_warning(DRV_NAME |
dd957c57 JV |
1496 | ": %s: Warning: The first slave device " |
1497 | "specified does not support setting the MAC " | |
3915c1e8 | 1498 | "address. Setting fail_over_mac to active.", |
dd957c57 | 1499 | bond_dev->name); |
3915c1e8 JV |
1500 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1501 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
3d632c3f | 1502 | pr_err(DRV_NAME |
dd957c57 JV |
1503 | ": %s: Error: The slave device specified " |
1504 | "does not support setting the MAC address, " | |
3915c1e8 | 1505 | "but fail_over_mac is not set to active.\n" |
2ab82852 MS |
1506 | , bond_dev->name); |
1507 | res = -EOPNOTSUPP; | |
1508 | goto err_undo_flags; | |
1509 | } | |
1da177e4 LT |
1510 | } |
1511 | ||
243cb4e5 | 1512 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1513 | if (!new_slave) { |
1514 | res = -ENOMEM; | |
1515 | goto err_undo_flags; | |
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | /* save slave's original flags before calling |
1519 | * netdev_set_master and dev_open | |
1520 | */ | |
1521 | new_slave->original_flags = slave_dev->flags; | |
1522 | ||
217df670 JV |
1523 | /* |
1524 | * Save slave's original ("permanent") mac address for modes | |
1525 | * that need it, and for restoring it upon release, and then | |
1526 | * set it to the master's address | |
1527 | */ | |
1528 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1529 | |
dd957c57 | 1530 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1531 | /* |
1532 | * Set slave to master's mac address. The application already | |
1533 | * set the master's mac address to that of the first slave | |
1534 | */ | |
1535 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1536 | addr.sa_family = slave_dev->type; | |
1537 | res = dev_set_mac_address(slave_dev, &addr); | |
1538 | if (res) { | |
5a03cdb7 | 1539 | pr_debug("Error %d calling set_mac_address\n", res); |
2ab82852 MS |
1540 | goto err_free; |
1541 | } | |
217df670 | 1542 | } |
1da177e4 | 1543 | |
c2edacf8 JV |
1544 | res = netdev_set_master(slave_dev, bond_dev); |
1545 | if (res) { | |
5a03cdb7 | 1546 | pr_debug("Error %d calling netdev_set_master\n", res); |
569f0c4d | 1547 | goto err_restore_mac; |
c2edacf8 | 1548 | } |
217df670 JV |
1549 | /* open the slave since the application closed it */ |
1550 | res = dev_open(slave_dev); | |
1551 | if (res) { | |
3d632c3f | 1552 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
569f0c4d | 1553 | goto err_unset_master; |
1da177e4 LT |
1554 | } |
1555 | ||
1da177e4 | 1556 | new_slave->dev = slave_dev; |
0b680e75 | 1557 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1558 | |
58402054 | 1559 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1560 | /* bond_alb_init_slave() must be called before all other stages since |
1561 | * it might fail and we do not want to have to undo everything | |
1562 | */ | |
1563 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1564 | if (res) |
569f0c4d | 1565 | goto err_close; |
1da177e4 LT |
1566 | } |
1567 | ||
1568 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1569 | * master's promisc (and mc) settings only if it becomes the | |
1570 | * curr_active_slave, and that is taken care of later when calling | |
1571 | * bond_change_active() | |
1572 | */ | |
1573 | if (!USES_PRIMARY(bond->params.mode)) { | |
1574 | /* set promiscuity level to new slave */ | |
1575 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1576 | res = dev_set_promiscuity(slave_dev, 1); |
1577 | if (res) | |
1578 | goto err_close; | |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | /* set allmulti level to new slave */ | |
1582 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1583 | res = dev_set_allmulti(slave_dev, 1); |
1584 | if (res) | |
1585 | goto err_close; | |
1da177e4 LT |
1586 | } |
1587 | ||
b9e40857 | 1588 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1589 | /* upload master's mc_list to new slave */ |
3d632c3f SH |
1590 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) |
1591 | dev_mc_add(slave_dev, dmi->dmi_addr, | |
1592 | dmi->dmi_addrlen, 0); | |
b9e40857 | 1593 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1594 | } |
1595 | ||
1596 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1597 | /* add lacpdu mc addr to mc list */ | |
1598 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1599 | ||
1600 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1601 | } | |
1602 | ||
1603 | bond_add_vlans_on_slave(bond, slave_dev); | |
1604 | ||
1605 | write_lock_bh(&bond->lock); | |
1606 | ||
1607 | bond_attach_slave(bond, new_slave); | |
1608 | ||
1609 | new_slave->delay = 0; | |
1610 | new_slave->link_failure_count = 0; | |
1611 | ||
8531c5ff AK |
1612 | bond_compute_features(bond); |
1613 | ||
3915c1e8 JV |
1614 | write_unlock_bh(&bond->lock); |
1615 | ||
1616 | read_lock(&bond->lock); | |
1617 | ||
f5b2b966 JV |
1618 | new_slave->last_arp_rx = jiffies; |
1619 | ||
1da177e4 LT |
1620 | if (bond->params.miimon && !bond->params.use_carrier) { |
1621 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1622 | ||
1623 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1624 | /* | |
1625 | * miimon is set but a bonded network driver | |
1626 | * does not support ETHTOOL/MII and | |
1627 | * arp_interval is not set. Note: if | |
1628 | * use_carrier is enabled, we will never go | |
1629 | * here (because netif_carrier is always | |
1630 | * supported); thus, we don't need to change | |
1631 | * the messages for netif_carrier. | |
1632 | */ | |
3d632c3f | 1633 | pr_warning(DRV_NAME |
4e0952c7 | 1634 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1635 | "available for interface %s, and " |
1636 | "arp_interval/arp_ip_target module parameters " | |
1637 | "not specified, thus bonding will not detect " | |
1638 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1639 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1640 | } else if (link_reporting == -1) { |
1641 | /* unable get link status using mii/ethtool */ | |
3d632c3f | 1642 | pr_warning(DRV_NAME |
4e0952c7 | 1643 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1644 | "interface %s; the network driver associated " |
1645 | "with this interface does not support MII or " | |
1646 | "ETHTOOL link status reporting, thus miimon " | |
1647 | "has no effect on this interface.\n", | |
4e0952c7 | 1648 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1649 | } |
1650 | } | |
1651 | ||
1652 | /* check for initial state */ | |
1653 | if (!bond->params.miimon || | |
1654 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1655 | if (bond->params.updelay) { | |
5a03cdb7 | 1656 | pr_debug("Initial state of slave_dev is " |
1da177e4 LT |
1657 | "BOND_LINK_BACK\n"); |
1658 | new_slave->link = BOND_LINK_BACK; | |
1659 | new_slave->delay = bond->params.updelay; | |
1660 | } else { | |
5a03cdb7 | 1661 | pr_debug("Initial state of slave_dev is " |
1da177e4 LT |
1662 | "BOND_LINK_UP\n"); |
1663 | new_slave->link = BOND_LINK_UP; | |
1664 | } | |
1665 | new_slave->jiffies = jiffies; | |
1666 | } else { | |
5a03cdb7 | 1667 | pr_debug("Initial state of slave_dev is " |
1da177e4 LT |
1668 | "BOND_LINK_DOWN\n"); |
1669 | new_slave->link = BOND_LINK_DOWN; | |
1670 | } | |
1671 | ||
1672 | if (bond_update_speed_duplex(new_slave) && | |
1673 | (new_slave->link != BOND_LINK_DOWN)) { | |
3d632c3f | 1674 | pr_warning(DRV_NAME |
4e0952c7 | 1675 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1676 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1677 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1678 | |
1679 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3d632c3f | 1680 | pr_warning(DRV_NAME |
4e0952c7 | 1681 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " |
1da177e4 | 1682 | "support in base driver for proper aggregator " |
4e0952c7 | 1683 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1684 | } |
1685 | } | |
1686 | ||
1687 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1688 | /* if there is a primary slave, remember it */ | |
3d632c3f | 1689 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) |
1da177e4 | 1690 | bond->primary_slave = new_slave; |
1da177e4 LT |
1691 | } |
1692 | ||
3915c1e8 JV |
1693 | write_lock_bh(&bond->curr_slave_lock); |
1694 | ||
1da177e4 LT |
1695 | switch (bond->params.mode) { |
1696 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1697 | bond_set_slave_inactive_flags(new_slave); |
1698 | bond_select_active_slave(bond); | |
1da177e4 LT |
1699 | break; |
1700 | case BOND_MODE_8023AD: | |
1701 | /* in 802.3ad mode, the internal mechanism | |
1702 | * will activate the slaves in the selected | |
1703 | * aggregator | |
1704 | */ | |
1705 | bond_set_slave_inactive_flags(new_slave); | |
1706 | /* if this is the first slave */ | |
1707 | if (bond->slave_cnt == 1) { | |
1708 | SLAVE_AD_INFO(new_slave).id = 1; | |
1709 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1710 | * can be called only after the mac address of the bond is set | |
1711 | */ | |
1712 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1713 | bond->params.lacp_fast); | |
1714 | } else { | |
1715 | SLAVE_AD_INFO(new_slave).id = | |
1716 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1717 | } | |
1718 | ||
1719 | bond_3ad_bind_slave(new_slave); | |
1720 | break; | |
1721 | case BOND_MODE_TLB: | |
1722 | case BOND_MODE_ALB: | |
1723 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1724 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1725 | bond_select_active_slave(bond); |
1da177e4 LT |
1726 | break; |
1727 | default: | |
5a03cdb7 | 1728 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1729 | |
1730 | /* always active in trunk mode */ | |
1731 | new_slave->state = BOND_STATE_ACTIVE; | |
1732 | ||
1733 | /* In trunking mode there is little meaning to curr_active_slave | |
1734 | * anyway (it holds no special properties of the bond device), | |
1735 | * so we can change it without calling change_active_interface() | |
1736 | */ | |
3d632c3f | 1737 | if (!bond->curr_active_slave) |
1da177e4 | 1738 | bond->curr_active_slave = new_slave; |
3d632c3f | 1739 | |
1da177e4 LT |
1740 | break; |
1741 | } /* switch(bond_mode) */ | |
1742 | ||
3915c1e8 JV |
1743 | write_unlock_bh(&bond->curr_slave_lock); |
1744 | ||
ff59c456 JV |
1745 | bond_set_carrier(bond); |
1746 | ||
3915c1e8 | 1747 | read_unlock(&bond->lock); |
1da177e4 | 1748 | |
b76cdba9 MW |
1749 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1750 | if (res) | |
569f0c4d | 1751 | goto err_close; |
b76cdba9 | 1752 | |
3d632c3f | 1753 | pr_info(DRV_NAME |
1da177e4 LT |
1754 | ": %s: enslaving %s as a%s interface with a%s link.\n", |
1755 | bond_dev->name, slave_dev->name, | |
1756 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1757 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1758 | ||
1759 | /* enslave is successful */ | |
1760 | return 0; | |
1761 | ||
1762 | /* Undo stages on error */ | |
1da177e4 LT |
1763 | err_close: |
1764 | dev_close(slave_dev); | |
1765 | ||
569f0c4d JV |
1766 | err_unset_master: |
1767 | netdev_set_master(slave_dev, NULL); | |
1768 | ||
1da177e4 | 1769 | err_restore_mac: |
dd957c57 | 1770 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1771 | /* XXX TODO - fom follow mode needs to change master's |
1772 | * MAC if this slave's MAC is in use by the bond, or at | |
1773 | * least print a warning. | |
1774 | */ | |
2ab82852 MS |
1775 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1776 | addr.sa_family = slave_dev->type; | |
1777 | dev_set_mac_address(slave_dev, &addr); | |
1778 | } | |
1da177e4 LT |
1779 | |
1780 | err_free: | |
1781 | kfree(new_slave); | |
1782 | ||
1783 | err_undo_flags: | |
1784 | bond_dev->features = old_features; | |
3d632c3f | 1785 | |
1da177e4 LT |
1786 | return res; |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * Try to release the slave device <slave> from the bond device <master> | |
1791 | * It is legal to access curr_active_slave without a lock because all the function | |
1792 | * is write-locked. | |
1793 | * | |
1794 | * The rules for slave state should be: | |
1795 | * for Active/Backup: | |
1796 | * Active stays on all backups go down | |
1797 | * for Bonded connections: | |
1798 | * The first up interface should be left on and all others downed. | |
1799 | */ | |
a77b5325 | 1800 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1801 | { |
454d7c9b | 1802 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1803 | struct slave *slave, *oldcurrent; |
1804 | struct sockaddr addr; | |
1da177e4 LT |
1805 | |
1806 | /* slave is not a slave or master is not master of this slave */ | |
1807 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1808 | (slave_dev->master != bond_dev)) { | |
3d632c3f | 1809 | pr_err(DRV_NAME |
4e0952c7 | 1810 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
1811 | bond_dev->name, slave_dev->name); |
1812 | return -EINVAL; | |
1813 | } | |
1814 | ||
1815 | write_lock_bh(&bond->lock); | |
1816 | ||
1817 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1818 | if (!slave) { | |
1819 | /* not a slave of this bond */ | |
3d632c3f | 1820 | pr_info(DRV_NAME |
1da177e4 LT |
1821 | ": %s: %s not enslaved\n", |
1822 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1823 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1824 | return -EINVAL; |
1825 | } | |
1826 | ||
3915c1e8 | 1827 | if (!bond->params.fail_over_mac) { |
89c76c62 SH |
1828 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) |
1829 | && bond->slave_cnt > 1) | |
3d632c3f | 1830 | pr_warning(DRV_NAME |
3915c1e8 | 1831 | ": %s: Warning: the permanent HWaddr of %s - " |
e174961c | 1832 | "%pM - is still in use by %s. " |
3915c1e8 JV |
1833 | "Set the HWaddr of %s to a different address " |
1834 | "to avoid conflicts.\n", | |
1835 | bond_dev->name, slave_dev->name, | |
e174961c | 1836 | slave->perm_hwaddr, |
3915c1e8 | 1837 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1838 | } |
1839 | ||
1840 | /* Inform AD package of unbinding of slave. */ | |
1841 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1842 | /* must be called before the slave is | |
1843 | * detached from the list | |
1844 | */ | |
1845 | bond_3ad_unbind_slave(slave); | |
1846 | } | |
1847 | ||
3d632c3f | 1848 | pr_info(DRV_NAME |
1da177e4 LT |
1849 | ": %s: releasing %s interface %s\n", |
1850 | bond_dev->name, | |
1851 | (slave->state == BOND_STATE_ACTIVE) | |
1852 | ? "active" : "backup", | |
1853 | slave_dev->name); | |
1854 | ||
1855 | oldcurrent = bond->curr_active_slave; | |
1856 | ||
1857 | bond->current_arp_slave = NULL; | |
1858 | ||
1859 | /* release the slave from its bond */ | |
1860 | bond_detach_slave(bond, slave); | |
1861 | ||
8531c5ff AK |
1862 | bond_compute_features(bond); |
1863 | ||
3d632c3f | 1864 | if (bond->primary_slave == slave) |
1da177e4 | 1865 | bond->primary_slave = NULL; |
1da177e4 | 1866 | |
3d632c3f | 1867 | if (oldcurrent == slave) |
1da177e4 | 1868 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1869 | |
58402054 | 1870 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1871 | /* Must be called only after the slave has been |
1872 | * detached from the list and the curr_active_slave | |
1873 | * has been cleared (if our_slave == old_current), | |
1874 | * but before a new active slave is selected. | |
1875 | */ | |
2543331d | 1876 | write_unlock_bh(&bond->lock); |
1da177e4 | 1877 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1878 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1879 | } |
1880 | ||
059fe7a5 JV |
1881 | if (oldcurrent == slave) { |
1882 | /* | |
1883 | * Note that we hold RTNL over this sequence, so there | |
1884 | * is no concern that another slave add/remove event | |
1885 | * will interfere. | |
1886 | */ | |
1887 | write_unlock_bh(&bond->lock); | |
1888 | read_lock(&bond->lock); | |
1889 | write_lock_bh(&bond->curr_slave_lock); | |
1890 | ||
1da177e4 LT |
1891 | bond_select_active_slave(bond); |
1892 | ||
059fe7a5 JV |
1893 | write_unlock_bh(&bond->curr_slave_lock); |
1894 | read_unlock(&bond->lock); | |
1895 | write_lock_bh(&bond->lock); | |
1896 | } | |
1897 | ||
1da177e4 | 1898 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1899 | bond_set_carrier(bond); |
1900 | ||
1da177e4 LT |
1901 | /* if the last slave was removed, zero the mac address |
1902 | * of the master so it will be set by the application | |
1903 | * to the mac address of the first slave | |
1904 | */ | |
1905 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1906 | ||
1907 | if (list_empty(&bond->vlan_list)) { | |
1908 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1909 | } else { | |
3d632c3f | 1910 | pr_warning(DRV_NAME |
4e0952c7 | 1911 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1912 | "still has VLANs.\n", |
4e0952c7 | 1913 | bond_dev->name, bond_dev->name); |
3d632c3f | 1914 | pr_warning(DRV_NAME |
4e0952c7 MW |
1915 | ": %s: When re-adding slaves, make sure the bond's " |
1916 | "HW address matches its VLANs'.\n", | |
1917 | bond_dev->name); | |
1da177e4 LT |
1918 | } |
1919 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1920 | !bond_has_challenged_slaves(bond)) { | |
3d632c3f | 1921 | pr_info(DRV_NAME |
4e0952c7 | 1922 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 1923 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 1924 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
1925 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1926 | } | |
1927 | ||
1928 | write_unlock_bh(&bond->lock); | |
1929 | ||
b76cdba9 MW |
1930 | /* must do this from outside any spinlocks */ |
1931 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1932 | ||
1da177e4 LT |
1933 | bond_del_vlans_from_slave(bond, slave_dev); |
1934 | ||
1935 | /* If the mode USES_PRIMARY, then we should only remove its | |
1936 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1937 | * already taken care of above when we detached the slave | |
1938 | */ | |
1939 | if (!USES_PRIMARY(bond->params.mode)) { | |
1940 | /* unset promiscuity level from slave */ | |
3d632c3f | 1941 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 1942 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1943 | |
1944 | /* unset allmulti level from slave */ | |
3d632c3f | 1945 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 1946 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
1947 | |
1948 | /* flush master's mc_list from slave */ | |
b9e40857 | 1949 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1950 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 1951 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1952 | } |
1953 | ||
1954 | netdev_set_master(slave_dev, NULL); | |
1955 | ||
1956 | /* close slave before restoring its mac address */ | |
1957 | dev_close(slave_dev); | |
1958 | ||
3915c1e8 | 1959 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1960 | /* restore original ("permanent") mac address */ |
1961 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1962 | addr.sa_family = slave_dev->type; | |
1963 | dev_set_mac_address(slave_dev, &addr); | |
1964 | } | |
1da177e4 | 1965 | |
8f903c70 | 1966 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1967 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1968 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1969 | |
1970 | kfree(slave); | |
1971 | ||
1972 | return 0; /* deletion OK */ | |
1973 | } | |
1974 | ||
d90a162a MS |
1975 | /* |
1976 | * Destroy a bonding device. | |
1977 | * Must be under rtnl_lock when this function is called. | |
1978 | */ | |
9e71626c | 1979 | static void bond_uninit(struct net_device *bond_dev) |
a434e43f | 1980 | { |
244ef9b9 | 1981 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f | 1982 | |
9e71626c SH |
1983 | bond_deinit(bond_dev); |
1984 | bond_destroy_sysfs_entry(bond); | |
1985 | ||
a434e43f JV |
1986 | if (bond->wq) |
1987 | destroy_workqueue(bond->wq); | |
1988 | ||
1989 | netif_addr_lock_bh(bond_dev); | |
1990 | bond_mc_list_destroy(bond); | |
1991 | netif_addr_unlock_bh(bond_dev); | |
a434e43f JV |
1992 | } |
1993 | ||
d90a162a | 1994 | /* |
3d632c3f | 1995 | * First release a slave and than destroy the bond if no more slaves are left. |
d90a162a MS |
1996 | * Must be under rtnl_lock when this function is called. |
1997 | */ | |
3d632c3f SH |
1998 | int bond_release_and_destroy(struct net_device *bond_dev, |
1999 | struct net_device *slave_dev) | |
d90a162a | 2000 | { |
454d7c9b | 2001 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2002 | int ret; |
2003 | ||
2004 | ret = bond_release(bond_dev, slave_dev); | |
2005 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
3d632c3f | 2006 | pr_info(DRV_NAME ": %s: destroying bond %s.\n", |
d90a162a | 2007 | bond_dev->name, bond_dev->name); |
9e71626c | 2008 | unregister_netdevice(bond_dev); |
d90a162a MS |
2009 | } |
2010 | return ret; | |
2011 | } | |
2012 | ||
1da177e4 LT |
2013 | /* |
2014 | * This function releases all slaves. | |
2015 | */ | |
2016 | static int bond_release_all(struct net_device *bond_dev) | |
2017 | { | |
454d7c9b | 2018 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2019 | struct slave *slave; |
2020 | struct net_device *slave_dev; | |
2021 | struct sockaddr addr; | |
2022 | ||
2023 | write_lock_bh(&bond->lock); | |
2024 | ||
ff59c456 JV |
2025 | netif_carrier_off(bond_dev); |
2026 | ||
3d632c3f | 2027 | if (bond->slave_cnt == 0) |
1da177e4 | 2028 | goto out; |
1da177e4 LT |
2029 | |
2030 | bond->current_arp_slave = NULL; | |
2031 | bond->primary_slave = NULL; | |
2032 | bond_change_active_slave(bond, NULL); | |
2033 | ||
2034 | while ((slave = bond->first_slave) != NULL) { | |
2035 | /* Inform AD package of unbinding of slave | |
2036 | * before slave is detached from the list. | |
2037 | */ | |
3d632c3f | 2038 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2039 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2040 | |
2041 | slave_dev = slave->dev; | |
2042 | bond_detach_slave(bond, slave); | |
2043 | ||
2543331d JV |
2044 | /* now that the slave is detached, unlock and perform |
2045 | * all the undo steps that should not be called from | |
2046 | * within a lock. | |
2047 | */ | |
2048 | write_unlock_bh(&bond->lock); | |
2049 | ||
58402054 | 2050 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2051 | /* must be called only after the slave |
2052 | * has been detached from the list | |
2053 | */ | |
2054 | bond_alb_deinit_slave(bond, slave); | |
2055 | } | |
2056 | ||
8531c5ff AK |
2057 | bond_compute_features(bond); |
2058 | ||
b76cdba9 | 2059 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2060 | bond_del_vlans_from_slave(bond, slave_dev); |
2061 | ||
2062 | /* If the mode USES_PRIMARY, then we should only remove its | |
2063 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2064 | * already taken care of above when we detached the slave | |
2065 | */ | |
2066 | if (!USES_PRIMARY(bond->params.mode)) { | |
2067 | /* unset promiscuity level from slave */ | |
3d632c3f | 2068 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2069 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2070 | |
2071 | /* unset allmulti level from slave */ | |
3d632c3f | 2072 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2073 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2074 | |
2075 | /* flush master's mc_list from slave */ | |
b9e40857 | 2076 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2077 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2078 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2079 | } |
2080 | ||
2081 | netdev_set_master(slave_dev, NULL); | |
2082 | ||
2083 | /* close slave before restoring its mac address */ | |
2084 | dev_close(slave_dev); | |
2085 | ||
dd957c57 | 2086 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2087 | /* restore original ("permanent") mac address*/ |
2088 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2089 | addr.sa_family = slave_dev->type; | |
2090 | dev_set_mac_address(slave_dev, &addr); | |
2091 | } | |
1da177e4 | 2092 | |
8f903c70 JV |
2093 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
2094 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
2095 | |
2096 | kfree(slave); | |
2097 | ||
2098 | /* re-acquire the lock before getting the next slave */ | |
2099 | write_lock_bh(&bond->lock); | |
2100 | } | |
2101 | ||
2102 | /* zero the mac address of the master so it will be | |
2103 | * set by the application to the mac address of the | |
2104 | * first slave | |
2105 | */ | |
2106 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2107 | ||
3d632c3f | 2108 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 2109 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
3d632c3f SH |
2110 | else { |
2111 | pr_warning(DRV_NAME | |
4e0952c7 | 2112 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 2113 | "still has VLANs.\n", |
4e0952c7 | 2114 | bond_dev->name, bond_dev->name); |
3d632c3f | 2115 | pr_warning(DRV_NAME |
4e0952c7 MW |
2116 | ": %s: When re-adding slaves, make sure the bond's " |
2117 | "HW address matches its VLANs'.\n", | |
2118 | bond_dev->name); | |
1da177e4 LT |
2119 | } |
2120 | ||
3d632c3f | 2121 | pr_info(DRV_NAME |
1da177e4 LT |
2122 | ": %s: released all slaves\n", |
2123 | bond_dev->name); | |
2124 | ||
2125 | out: | |
2126 | write_unlock_bh(&bond->lock); | |
2127 | ||
2128 | return 0; | |
2129 | } | |
2130 | ||
2131 | /* | |
2132 | * This function changes the active slave to slave <slave_dev>. | |
2133 | * It returns -EINVAL in the following cases. | |
2134 | * - <slave_dev> is not found in the list. | |
2135 | * - There is not active slave now. | |
2136 | * - <slave_dev> is already active. | |
2137 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2138 | * - <slave_dev> is not running. | |
3d632c3f SH |
2139 | * In these cases, this function does nothing. |
2140 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2141 | */ |
2142 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2143 | { | |
454d7c9b | 2144 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2145 | struct slave *old_active = NULL; |
2146 | struct slave *new_active = NULL; | |
2147 | int res = 0; | |
2148 | ||
3d632c3f | 2149 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2150 | return -EINVAL; |
1da177e4 LT |
2151 | |
2152 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2153 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2154 | return -EINVAL; |
1da177e4 | 2155 | |
059fe7a5 | 2156 | read_lock(&bond->lock); |
1da177e4 | 2157 | |
059fe7a5 | 2158 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2159 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2160 | read_unlock(&bond->curr_slave_lock); |
2161 | ||
1da177e4 LT |
2162 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2163 | ||
2164 | /* | |
2165 | * Changing to the current active: do nothing; return success. | |
2166 | */ | |
2167 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2168 | read_unlock(&bond->lock); |
1da177e4 LT |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | if ((new_active) && | |
2173 | (old_active) && | |
2174 | (new_active->link == BOND_LINK_UP) && | |
2175 | IS_UP(new_active->dev)) { | |
059fe7a5 | 2176 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2177 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2178 | write_unlock_bh(&bond->curr_slave_lock); |
3d632c3f | 2179 | } else |
1da177e4 | 2180 | res = -EINVAL; |
1da177e4 | 2181 | |
059fe7a5 | 2182 | read_unlock(&bond->lock); |
1da177e4 LT |
2183 | |
2184 | return res; | |
2185 | } | |
2186 | ||
1da177e4 LT |
2187 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2188 | { | |
454d7c9b | 2189 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2190 | |
2191 | info->bond_mode = bond->params.mode; | |
2192 | info->miimon = bond->params.miimon; | |
2193 | ||
6603a6f2 | 2194 | read_lock(&bond->lock); |
1da177e4 | 2195 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2196 | read_unlock(&bond->lock); |
1da177e4 LT |
2197 | |
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2202 | { | |
454d7c9b | 2203 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2204 | struct slave *slave; |
689c96cc | 2205 | int i, res = -ENODEV; |
1da177e4 | 2206 | |
6603a6f2 | 2207 | read_lock(&bond->lock); |
1da177e4 LT |
2208 | |
2209 | bond_for_each_slave(bond, slave, i) { | |
2210 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2211 | res = 0; |
2212 | strcpy(info->slave_name, slave->dev->name); | |
2213 | info->link = slave->link; | |
2214 | info->state = slave->state; | |
2215 | info->link_failure_count = slave->link_failure_count; | |
1da177e4 LT |
2216 | break; |
2217 | } | |
2218 | } | |
2219 | ||
6603a6f2 | 2220 | read_unlock(&bond->lock); |
1da177e4 | 2221 | |
689c96cc | 2222 | return res; |
1da177e4 LT |
2223 | } |
2224 | ||
2225 | /*-------------------------------- Monitoring -------------------------------*/ | |
2226 | ||
1da177e4 | 2227 | |
f0c76d61 JV |
2228 | static int bond_miimon_inspect(struct bonding *bond) |
2229 | { | |
2230 | struct slave *slave; | |
2231 | int i, link_state, commit = 0; | |
41f89100 JP |
2232 | bool ignore_updelay; |
2233 | ||
2234 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2235 | |
2236 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2237 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2238 | |
f0c76d61 | 2239 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2240 | |
2241 | switch (slave->link) { | |
f0c76d61 JV |
2242 | case BOND_LINK_UP: |
2243 | if (link_state) | |
2244 | continue; | |
1da177e4 | 2245 | |
f0c76d61 JV |
2246 | slave->link = BOND_LINK_FAIL; |
2247 | slave->delay = bond->params.downdelay; | |
2248 | if (slave->delay) { | |
3d632c3f | 2249 | pr_info(DRV_NAME |
f0c76d61 JV |
2250 | ": %s: link status down for %s" |
2251 | "interface %s, disabling it in %d ms.\n", | |
2252 | bond->dev->name, | |
2253 | (bond->params.mode == | |
2254 | BOND_MODE_ACTIVEBACKUP) ? | |
2255 | ((slave->state == BOND_STATE_ACTIVE) ? | |
2256 | "active " : "backup ") : "", | |
2257 | slave->dev->name, | |
2258 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2259 | } |
f0c76d61 JV |
2260 | /*FALLTHRU*/ |
2261 | case BOND_LINK_FAIL: | |
2262 | if (link_state) { | |
2263 | /* | |
2264 | * recovered before downdelay expired | |
2265 | */ | |
2266 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2267 | slave->jiffies = jiffies; |
3d632c3f | 2268 | pr_info(DRV_NAME |
1da177e4 LT |
2269 | ": %s: link status up again after %d " |
2270 | "ms for interface %s.\n", | |
1b76b316 | 2271 | bond->dev->name, |
f0c76d61 JV |
2272 | (bond->params.downdelay - slave->delay) * |
2273 | bond->params.miimon, | |
2274 | slave->dev->name); | |
2275 | continue; | |
1da177e4 | 2276 | } |
f0c76d61 JV |
2277 | |
2278 | if (slave->delay <= 0) { | |
2279 | slave->new_link = BOND_LINK_DOWN; | |
2280 | commit++; | |
2281 | continue; | |
1da177e4 | 2282 | } |
1da177e4 | 2283 | |
f0c76d61 JV |
2284 | slave->delay--; |
2285 | break; | |
2286 | ||
2287 | case BOND_LINK_DOWN: | |
2288 | if (!link_state) | |
2289 | continue; | |
2290 | ||
2291 | slave->link = BOND_LINK_BACK; | |
2292 | slave->delay = bond->params.updelay; | |
2293 | ||
2294 | if (slave->delay) { | |
3d632c3f | 2295 | pr_info(DRV_NAME |
f0c76d61 JV |
2296 | ": %s: link status up for " |
2297 | "interface %s, enabling it in %d ms.\n", | |
2298 | bond->dev->name, slave->dev->name, | |
41f89100 | 2299 | ignore_updelay ? 0 : |
f0c76d61 JV |
2300 | bond->params.updelay * |
2301 | bond->params.miimon); | |
2302 | } | |
2303 | /*FALLTHRU*/ | |
2304 | case BOND_LINK_BACK: | |
2305 | if (!link_state) { | |
2306 | slave->link = BOND_LINK_DOWN; | |
3d632c3f | 2307 | pr_info(DRV_NAME |
1da177e4 LT |
2308 | ": %s: link status down again after %d " |
2309 | "ms for interface %s.\n", | |
1b76b316 | 2310 | bond->dev->name, |
f0c76d61 JV |
2311 | (bond->params.updelay - slave->delay) * |
2312 | bond->params.miimon, | |
2313 | slave->dev->name); | |
2314 | ||
2315 | continue; | |
2316 | } | |
2317 | ||
41f89100 JP |
2318 | if (ignore_updelay) |
2319 | slave->delay = 0; | |
2320 | ||
f0c76d61 JV |
2321 | if (slave->delay <= 0) { |
2322 | slave->new_link = BOND_LINK_UP; | |
2323 | commit++; | |
41f89100 | 2324 | ignore_updelay = false; |
f0c76d61 | 2325 | continue; |
1da177e4 | 2326 | } |
f0c76d61 JV |
2327 | |
2328 | slave->delay--; | |
1da177e4 | 2329 | break; |
f0c76d61 JV |
2330 | } |
2331 | } | |
1da177e4 | 2332 | |
f0c76d61 JV |
2333 | return commit; |
2334 | } | |
1da177e4 | 2335 | |
f0c76d61 JV |
2336 | static void bond_miimon_commit(struct bonding *bond) |
2337 | { | |
2338 | struct slave *slave; | |
2339 | int i; | |
2340 | ||
2341 | bond_for_each_slave(bond, slave, i) { | |
2342 | switch (slave->new_link) { | |
2343 | case BOND_LINK_NOCHANGE: | |
2344 | continue; | |
1da177e4 | 2345 | |
f0c76d61 JV |
2346 | case BOND_LINK_UP: |
2347 | slave->link = BOND_LINK_UP; | |
2348 | slave->jiffies = jiffies; | |
2349 | ||
2350 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2351 | /* prevent it from being the active one */ | |
2352 | slave->state = BOND_STATE_BACKUP; | |
2353 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2354 | /* make it immediately active */ | |
2355 | slave->state = BOND_STATE_ACTIVE; | |
2356 | } else if (slave != bond->primary_slave) { | |
2357 | /* prevent it from being the active one */ | |
2358 | slave->state = BOND_STATE_BACKUP; | |
1da177e4 | 2359 | } |
1da177e4 | 2360 | |
3d632c3f | 2361 | pr_info(DRV_NAME |
f0c76d61 JV |
2362 | ": %s: link status definitely " |
2363 | "up for interface %s.\n", | |
2364 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2365 | |
f0c76d61 JV |
2366 | /* notify ad that the link status has changed */ |
2367 | if (bond->params.mode == BOND_MODE_8023AD) | |
2368 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2369 | |
58402054 | 2370 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2371 | bond_alb_handle_link_change(bond, slave, |
2372 | BOND_LINK_UP); | |
1da177e4 | 2373 | |
f0c76d61 JV |
2374 | if (!bond->curr_active_slave || |
2375 | (slave == bond->primary_slave)) | |
2376 | goto do_failover; | |
1da177e4 | 2377 | |
f0c76d61 | 2378 | continue; |
059fe7a5 | 2379 | |
f0c76d61 | 2380 | case BOND_LINK_DOWN: |
fba4acda JV |
2381 | if (slave->link_failure_count < UINT_MAX) |
2382 | slave->link_failure_count++; | |
2383 | ||
f0c76d61 | 2384 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2385 | |
f0c76d61 JV |
2386 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2387 | bond->params.mode == BOND_MODE_8023AD) | |
2388 | bond_set_slave_inactive_flags(slave); | |
2389 | ||
3d632c3f | 2390 | pr_info(DRV_NAME |
f0c76d61 JV |
2391 | ": %s: link status definitely down for " |
2392 | "interface %s, disabling it\n", | |
2393 | bond->dev->name, slave->dev->name); | |
2394 | ||
2395 | if (bond->params.mode == BOND_MODE_8023AD) | |
2396 | bond_3ad_handle_link_change(slave, | |
2397 | BOND_LINK_DOWN); | |
2398 | ||
ae63e808 | 2399 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2400 | bond_alb_handle_link_change(bond, slave, |
2401 | BOND_LINK_DOWN); | |
2402 | ||
2403 | if (slave == bond->curr_active_slave) | |
2404 | goto do_failover; | |
2405 | ||
2406 | continue; | |
2407 | ||
2408 | default: | |
3d632c3f | 2409 | pr_err(DRV_NAME |
f0c76d61 JV |
2410 | ": %s: invalid new link %d on slave %s\n", |
2411 | bond->dev->name, slave->new_link, | |
2412 | slave->dev->name); | |
2413 | slave->new_link = BOND_LINK_NOCHANGE; | |
2414 | ||
2415 | continue; | |
2416 | } | |
2417 | ||
2418 | do_failover: | |
2419 | ASSERT_RTNL(); | |
2420 | write_lock_bh(&bond->curr_slave_lock); | |
2421 | bond_select_active_slave(bond); | |
2422 | write_unlock_bh(&bond->curr_slave_lock); | |
2423 | } | |
2424 | ||
2425 | bond_set_carrier(bond); | |
1da177e4 LT |
2426 | } |
2427 | ||
0b0eef66 JV |
2428 | /* |
2429 | * bond_mii_monitor | |
2430 | * | |
2431 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2432 | * inspection, then (if inspection indicates something needs to be done) |
2433 | * an acquisition of appropriate locks followed by a commit phase to | |
2434 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2435 | */ |
2436 | void bond_mii_monitor(struct work_struct *work) | |
2437 | { | |
2438 | struct bonding *bond = container_of(work, struct bonding, | |
2439 | mii_work.work); | |
0b0eef66 JV |
2440 | |
2441 | read_lock(&bond->lock); | |
f0c76d61 JV |
2442 | if (bond->kill_timers) |
2443 | goto out; | |
2444 | ||
2445 | if (bond->slave_cnt == 0) | |
2446 | goto re_arm; | |
b59f9f74 JV |
2447 | |
2448 | if (bond->send_grat_arp) { | |
2449 | read_lock(&bond->curr_slave_lock); | |
2450 | bond_send_gratuitous_arp(bond); | |
2451 | read_unlock(&bond->curr_slave_lock); | |
2452 | } | |
2453 | ||
305d552a BH |
2454 | if (bond->send_unsol_na) { |
2455 | read_lock(&bond->curr_slave_lock); | |
2456 | bond_send_unsolicited_na(bond); | |
2457 | read_unlock(&bond->curr_slave_lock); | |
2458 | } | |
2459 | ||
f0c76d61 | 2460 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2461 | read_unlock(&bond->lock); |
2462 | rtnl_lock(); | |
2463 | read_lock(&bond->lock); | |
f0c76d61 JV |
2464 | |
2465 | bond_miimon_commit(bond); | |
2466 | ||
5655662d JV |
2467 | read_unlock(&bond->lock); |
2468 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2469 | read_lock(&bond->lock); | |
0b0eef66 JV |
2470 | } |
2471 | ||
f0c76d61 JV |
2472 | re_arm: |
2473 | if (bond->params.miimon) | |
2474 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2475 | msecs_to_jiffies(bond->params.miimon)); | |
2476 | out: | |
0b0eef66 | 2477 | read_unlock(&bond->lock); |
0b0eef66 | 2478 | } |
c3ade5ca | 2479 | |
d3bb52b0 | 2480 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2481 | { |
2482 | struct in_device *idev; | |
2483 | struct in_ifaddr *ifa; | |
a144ea4b | 2484 | __be32 addr = 0; |
c3ade5ca JV |
2485 | |
2486 | if (!dev) | |
2487 | return 0; | |
2488 | ||
2489 | rcu_read_lock(); | |
e5ed6399 | 2490 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2491 | if (!idev) |
2492 | goto out; | |
2493 | ||
2494 | ifa = idev->ifa_list; | |
2495 | if (!ifa) | |
2496 | goto out; | |
2497 | ||
2498 | addr = ifa->ifa_local; | |
2499 | out: | |
2500 | rcu_read_unlock(); | |
2501 | return addr; | |
2502 | } | |
2503 | ||
d3bb52b0 | 2504 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2505 | { |
0883beca | 2506 | struct vlan_entry *vlan; |
f5b2b966 JV |
2507 | |
2508 | if (ip == bond->master_ip) | |
2509 | return 1; | |
2510 | ||
0883beca | 2511 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2512 | if (ip == vlan->vlan_ip) |
2513 | return 1; | |
2514 | } | |
2515 | ||
2516 | return 0; | |
2517 | } | |
2518 | ||
c3ade5ca JV |
2519 | /* |
2520 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2521 | * switches in VLAN mode (especially if ports are configured as | |
2522 | * "native" to a VLAN) might not pass non-tagged frames. | |
2523 | */ | |
d3bb52b0 | 2524 | 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 |
2525 | { |
2526 | struct sk_buff *skb; | |
2527 | ||
5a03cdb7 | 2528 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
c3ade5ca | 2529 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2530 | |
c3ade5ca JV |
2531 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2532 | NULL, slave_dev->dev_addr, NULL); | |
2533 | ||
2534 | if (!skb) { | |
3d632c3f | 2535 | pr_err(DRV_NAME ": ARP packet allocation failed\n"); |
c3ade5ca JV |
2536 | return; |
2537 | } | |
2538 | if (vlan_id) { | |
2539 | skb = vlan_put_tag(skb, vlan_id); | |
2540 | if (!skb) { | |
3d632c3f | 2541 | pr_err(DRV_NAME ": failed to insert VLAN tag\n"); |
c3ade5ca JV |
2542 | return; |
2543 | } | |
2544 | } | |
2545 | arp_xmit(skb); | |
2546 | } | |
2547 | ||
2548 | ||
1da177e4 LT |
2549 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2550 | { | |
c3ade5ca | 2551 | int i, vlan_id, rv; |
d3bb52b0 | 2552 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2553 | struct vlan_entry *vlan; |
c3ade5ca JV |
2554 | struct net_device *vlan_dev; |
2555 | struct flowi fl; | |
2556 | struct rtable *rt; | |
1da177e4 | 2557 | |
6b780567 MW |
2558 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2559 | if (!targets[i]) | |
5a31bec0 | 2560 | break; |
5a03cdb7 | 2561 | pr_debug("basa: target %x\n", targets[i]); |
c3ade5ca | 2562 | if (list_empty(&bond->vlan_list)) { |
5a03cdb7 | 2563 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2564 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2565 | bond->master_ip, 0); | |
2566 | continue; | |
2567 | } | |
2568 | ||
2569 | /* | |
2570 | * If VLANs are configured, we do a route lookup to | |
2571 | * determine which VLAN interface would be used, so we | |
2572 | * can tag the ARP with the proper VLAN tag. | |
2573 | */ | |
2574 | memset(&fl, 0, sizeof(fl)); | |
2575 | fl.fl4_dst = targets[i]; | |
2576 | fl.fl4_tos = RTO_ONLINK; | |
2577 | ||
f206351a | 2578 | rv = ip_route_output_key(&init_net, &rt, &fl); |
c3ade5ca JV |
2579 | if (rv) { |
2580 | if (net_ratelimit()) { | |
3d632c3f | 2581 | pr_warning(DRV_NAME |
63779436 HH |
2582 | ": %s: no route to arp_ip_target %pI4\n", |
2583 | bond->dev->name, &fl.fl4_dst); | |
c3ade5ca JV |
2584 | } |
2585 | continue; | |
2586 | } | |
2587 | ||
2588 | /* | |
2589 | * This target is not on a VLAN | |
2590 | */ | |
2591 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2592 | ip_rt_put(rt); |
5a03cdb7 | 2593 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2594 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2595 | bond->master_ip, 0); | |
2596 | continue; | |
2597 | } | |
2598 | ||
2599 | vlan_id = 0; | |
0883beca | 2600 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2601 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2602 | if (vlan_dev == rt->u.dst.dev) { |
2603 | vlan_id = vlan->vlan_id; | |
5a03cdb7 | 2604 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2605 | vlan_dev->name, vlan_id); |
2606 | break; | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | if (vlan_id) { | |
ed4b9f80 | 2611 | ip_rt_put(rt); |
c3ade5ca JV |
2612 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2613 | vlan->vlan_ip, vlan_id); | |
2614 | continue; | |
2615 | } | |
2616 | ||
2617 | if (net_ratelimit()) { | |
3d632c3f | 2618 | pr_warning(DRV_NAME |
63779436 HH |
2619 | ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2620 | bond->dev->name, &fl.fl4_dst, | |
c3ade5ca JV |
2621 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); |
2622 | } | |
ed4b9f80 | 2623 | ip_rt_put(rt); |
c3ade5ca JV |
2624 | } |
2625 | } | |
2626 | ||
2627 | /* | |
2628 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2629 | * for each VLAN above us. | |
b59f9f74 JV |
2630 | * |
2631 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2632 | */ |
2633 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2634 | { | |
2635 | struct slave *slave = bond->curr_active_slave; | |
2636 | struct vlan_entry *vlan; | |
2637 | struct net_device *vlan_dev; | |
2638 | ||
5a03cdb7 | 2639 | pr_debug("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, |
c3ade5ca | 2640 | slave ? slave->dev->name : "NULL"); |
b59f9f74 JV |
2641 | |
2642 | if (!slave || !bond->send_grat_arp || | |
2643 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2644 | return; |
2645 | ||
b59f9f74 JV |
2646 | bond->send_grat_arp--; |
2647 | ||
c3ade5ca JV |
2648 | if (bond->master_ip) { |
2649 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2650 | bond->master_ip, 0); |
c3ade5ca JV |
2651 | } |
2652 | ||
2653 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
5c15bdec | 2654 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2655 | if (vlan->vlan_ip) { |
2656 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2657 | vlan->vlan_ip, vlan->vlan_id); | |
2658 | } | |
1da177e4 LT |
2659 | } |
2660 | } | |
2661 | ||
d3bb52b0 | 2662 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2663 | { |
2664 | int i; | |
d3bb52b0 | 2665 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2666 | |
f5b2b966 | 2667 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2668 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
63779436 | 2669 | &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip)); |
f5b2b966 JV |
2670 | if (sip == targets[i]) { |
2671 | if (bond_has_this_ip(bond, tip)) | |
2672 | slave->last_arp_rx = jiffies; | |
2673 | return; | |
2674 | } | |
2675 | } | |
2676 | } | |
2677 | ||
2678 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2679 | { | |
2680 | struct arphdr *arp; | |
2681 | struct slave *slave; | |
2682 | struct bonding *bond; | |
2683 | unsigned char *arp_ptr; | |
d3bb52b0 | 2684 | __be32 sip, tip; |
f5b2b966 | 2685 | |
c346dca1 | 2686 | if (dev_net(dev) != &init_net) |
e730c155 EB |
2687 | goto out; |
2688 | ||
f5b2b966 JV |
2689 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2690 | goto out; | |
2691 | ||
454d7c9b | 2692 | bond = netdev_priv(dev); |
f5b2b966 JV |
2693 | read_lock(&bond->lock); |
2694 | ||
5a03cdb7 | 2695 | pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", |
f5b2b966 JV |
2696 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", |
2697 | orig_dev ? orig_dev->name : "NULL"); | |
2698 | ||
2699 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2700 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2701 | goto out_unlock; | |
2702 | ||
988b7050 | 2703 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2704 | goto out_unlock; |
2705 | ||
d0a92be0 | 2706 | arp = arp_hdr(skb); |
f5b2b966 JV |
2707 | if (arp->ar_hln != dev->addr_len || |
2708 | skb->pkt_type == PACKET_OTHERHOST || | |
2709 | skb->pkt_type == PACKET_LOOPBACK || | |
2710 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2711 | arp->ar_pro != htons(ETH_P_IP) || | |
2712 | arp->ar_pln != 4) | |
2713 | goto out_unlock; | |
2714 | ||
2715 | arp_ptr = (unsigned char *)(arp + 1); | |
2716 | arp_ptr += dev->addr_len; | |
2717 | memcpy(&sip, arp_ptr, 4); | |
2718 | arp_ptr += 4 + dev->addr_len; | |
2719 | memcpy(&tip, arp_ptr, 4); | |
2720 | ||
5a03cdb7 | 2721 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
63779436 HH |
2722 | bond->dev->name, slave->dev->name, slave->state, |
2723 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2724 | &sip, &tip); | |
f5b2b966 JV |
2725 | |
2726 | /* | |
2727 | * Backup slaves won't see the ARP reply, but do come through | |
2728 | * here for each ARP probe (so we swap the sip/tip to validate | |
2729 | * the probe). In a "redundant switch, common router" type of | |
2730 | * configuration, the ARP probe will (hopefully) travel from | |
2731 | * the active, through one switch, the router, then the other | |
2732 | * switch before reaching the backup. | |
2733 | */ | |
2734 | if (slave->state == BOND_STATE_ACTIVE) | |
2735 | bond_validate_arp(bond, slave, sip, tip); | |
2736 | else | |
2737 | bond_validate_arp(bond, slave, tip, sip); | |
2738 | ||
2739 | out_unlock: | |
2740 | read_unlock(&bond->lock); | |
2741 | out: | |
2742 | dev_kfree_skb(skb); | |
2743 | return NET_RX_SUCCESS; | |
2744 | } | |
2745 | ||
1da177e4 LT |
2746 | /* |
2747 | * this function is called regularly to monitor each slave's link | |
2748 | * ensuring that traffic is being sent and received when arp monitoring | |
2749 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2750 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2751 | * arp monitoring in active backup mode. | |
2752 | */ | |
1b76b316 | 2753 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2754 | { |
1b76b316 JV |
2755 | struct bonding *bond = container_of(work, struct bonding, |
2756 | arp_work.work); | |
1da177e4 LT |
2757 | struct slave *slave, *oldcurrent; |
2758 | int do_failover = 0; | |
2759 | int delta_in_ticks; | |
2760 | int i; | |
2761 | ||
2762 | read_lock(&bond->lock); | |
2763 | ||
5ce0da8f | 2764 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2765 | |
3d632c3f | 2766 | if (bond->kill_timers) |
1da177e4 | 2767 | goto out; |
1da177e4 | 2768 | |
3d632c3f | 2769 | if (bond->slave_cnt == 0) |
1da177e4 | 2770 | goto re_arm; |
1da177e4 LT |
2771 | |
2772 | read_lock(&bond->curr_slave_lock); | |
2773 | oldcurrent = bond->curr_active_slave; | |
2774 | read_unlock(&bond->curr_slave_lock); | |
2775 | ||
2776 | /* see if any of the previous devices are up now (i.e. they have | |
2777 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2778 | * the picture unless it is null. also, slave->jiffies is not needed | |
2779 | * here because we send an arp on each slave and give a slave as | |
2780 | * long as it needs to get the tx/rx within the delta. | |
2781 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2782 | * so it can wait | |
2783 | */ | |
2784 | bond_for_each_slave(bond, slave, i) { | |
2785 | if (slave->link != BOND_LINK_UP) { | |
9d21493b | 2786 | if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) && |
b63bb739 | 2787 | time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) { |
1da177e4 LT |
2788 | |
2789 | slave->link = BOND_LINK_UP; | |
2790 | slave->state = BOND_STATE_ACTIVE; | |
2791 | ||
2792 | /* primary_slave has no meaning in round-robin | |
2793 | * mode. the window of a slave being up and | |
2794 | * curr_active_slave being null after enslaving | |
2795 | * is closed. | |
2796 | */ | |
2797 | if (!oldcurrent) { | |
3d632c3f | 2798 | pr_info(DRV_NAME |
1da177e4 LT |
2799 | ": %s: link status definitely " |
2800 | "up for interface %s, ", | |
1b76b316 | 2801 | bond->dev->name, |
1da177e4 LT |
2802 | slave->dev->name); |
2803 | do_failover = 1; | |
2804 | } else { | |
3d632c3f | 2805 | pr_info(DRV_NAME |
1da177e4 | 2806 | ": %s: interface %s is now up\n", |
1b76b316 | 2807 | bond->dev->name, |
1da177e4 LT |
2808 | slave->dev->name); |
2809 | } | |
2810 | } | |
2811 | } else { | |
2812 | /* slave->link == BOND_LINK_UP */ | |
2813 | ||
2814 | /* not all switches will respond to an arp request | |
2815 | * when the source ip is 0, so don't take the link down | |
2816 | * if we don't know our ip yet | |
2817 | */ | |
9d21493b | 2818 | if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) || |
4b8a9239 | 2819 | (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) { |
1da177e4 LT |
2820 | |
2821 | slave->link = BOND_LINK_DOWN; | |
2822 | slave->state = BOND_STATE_BACKUP; | |
2823 | ||
3d632c3f | 2824 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2825 | slave->link_failure_count++; |
1da177e4 | 2826 | |
3d632c3f | 2827 | pr_info(DRV_NAME |
1da177e4 | 2828 | ": %s: interface %s is now down.\n", |
1b76b316 | 2829 | bond->dev->name, |
1da177e4 LT |
2830 | slave->dev->name); |
2831 | ||
3d632c3f | 2832 | if (slave == oldcurrent) |
1da177e4 | 2833 | do_failover = 1; |
1da177e4 LT |
2834 | } |
2835 | } | |
2836 | ||
2837 | /* note: if switch is in round-robin mode, all links | |
2838 | * must tx arp to ensure all links rx an arp - otherwise | |
2839 | * links may oscillate or not come up at all; if switch is | |
2840 | * in something like xor mode, there is nothing we can | |
2841 | * do - all replies will be rx'ed on same link causing slaves | |
2842 | * to be unstable during low/no traffic periods | |
2843 | */ | |
3d632c3f | 2844 | if (IS_UP(slave->dev)) |
1da177e4 | 2845 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2846 | } |
2847 | ||
2848 | if (do_failover) { | |
059fe7a5 | 2849 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2850 | |
2851 | bond_select_active_slave(bond); | |
2852 | ||
059fe7a5 | 2853 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2854 | } |
2855 | ||
2856 | re_arm: | |
1b76b316 JV |
2857 | if (bond->params.arp_interval) |
2858 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2859 | out: |
2860 | read_unlock(&bond->lock); | |
2861 | } | |
2862 | ||
2863 | /* | |
b2220cad JV |
2864 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2865 | * changes. Sets new_link in slaves to specify what action should take | |
2866 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2867 | * to link states must be committed. | |
2868 | * | |
2869 | * Called with bond->lock held for read. | |
1da177e4 | 2870 | */ |
b2220cad | 2871 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2872 | { |
1da177e4 | 2873 | struct slave *slave; |
b2220cad | 2874 | int i, commit = 0; |
1da177e4 | 2875 | |
b2220cad JV |
2876 | bond_for_each_slave(bond, slave, i) { |
2877 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2878 | |
b2220cad JV |
2879 | if (slave->link != BOND_LINK_UP) { |
2880 | if (time_before_eq(jiffies, slave_last_rx(bond, slave) + | |
2881 | delta_in_ticks)) { | |
2882 | slave->new_link = BOND_LINK_UP; | |
2883 | commit++; | |
2884 | } | |
1da177e4 | 2885 | |
b2220cad JV |
2886 | continue; |
2887 | } | |
1da177e4 | 2888 | |
b2220cad JV |
2889 | /* |
2890 | * Give slaves 2*delta after being enslaved or made | |
2891 | * active. This avoids bouncing, as the last receive | |
2892 | * times need a full ARP monitor cycle to be updated. | |
2893 | */ | |
2894 | if (!time_after_eq(jiffies, slave->jiffies + | |
2895 | 2 * delta_in_ticks)) | |
2896 | continue; | |
2897 | ||
2898 | /* | |
2899 | * Backup slave is down if: | |
2900 | * - No current_arp_slave AND | |
2901 | * - more than 3*delta since last receive AND | |
2902 | * - the bond has an IP address | |
2903 | * | |
2904 | * Note: a non-null current_arp_slave indicates | |
2905 | * the curr_active_slave went down and we are | |
2906 | * searching for a new one; under this condition | |
2907 | * we only take the curr_active_slave down - this | |
2908 | * gives each slave a chance to tx/rx traffic | |
2909 | * before being taken out | |
2910 | */ | |
2911 | if (slave->state == BOND_STATE_BACKUP && | |
2912 | !bond->current_arp_slave && | |
2913 | time_after(jiffies, slave_last_rx(bond, slave) + | |
2914 | 3 * delta_in_ticks)) { | |
2915 | slave->new_link = BOND_LINK_DOWN; | |
2916 | commit++; | |
2917 | } | |
2918 | ||
2919 | /* | |
2920 | * Active slave is down if: | |
2921 | * - more than 2*delta since transmitting OR | |
2922 | * - (more than 2*delta since receive AND | |
2923 | * the bond has an IP address) | |
2924 | */ | |
2925 | if ((slave->state == BOND_STATE_ACTIVE) && | |
9d21493b | 2926 | (time_after_eq(jiffies, dev_trans_start(slave->dev) + |
b2220cad JV |
2927 | 2 * delta_in_ticks) || |
2928 | (time_after_eq(jiffies, slave_last_rx(bond, slave) | |
2929 | + 2 * delta_in_ticks)))) { | |
2930 | slave->new_link = BOND_LINK_DOWN; | |
2931 | commit++; | |
2932 | } | |
1da177e4 LT |
2933 | } |
2934 | ||
b2220cad JV |
2935 | read_lock(&bond->curr_slave_lock); |
2936 | ||
2937 | /* | |
2938 | * Trigger a commit if the primary option setting has changed. | |
1da177e4 | 2939 | */ |
b2220cad JV |
2940 | if (bond->primary_slave && |
2941 | (bond->primary_slave != bond->curr_active_slave) && | |
2942 | (bond->primary_slave->link == BOND_LINK_UP)) | |
2943 | commit++; | |
1da177e4 | 2944 | |
b2220cad | 2945 | read_unlock(&bond->curr_slave_lock); |
1da177e4 | 2946 | |
b2220cad JV |
2947 | return commit; |
2948 | } | |
1da177e4 | 2949 | |
b2220cad JV |
2950 | /* |
2951 | * Called to commit link state changes noted by inspection step of | |
2952 | * active-backup mode ARP monitor. | |
2953 | * | |
2954 | * Called with RTNL and bond->lock for read. | |
2955 | */ | |
2956 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2957 | { | |
2958 | struct slave *slave; | |
2959 | int i; | |
1da177e4 | 2960 | |
b2220cad JV |
2961 | bond_for_each_slave(bond, slave, i) { |
2962 | switch (slave->new_link) { | |
2963 | case BOND_LINK_NOCHANGE: | |
2964 | continue; | |
ff59c456 | 2965 | |
b2220cad JV |
2966 | case BOND_LINK_UP: |
2967 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 | 2968 | |
b2220cad | 2969 | if (!bond->curr_active_slave && |
9d21493b | 2970 | time_before_eq(jiffies, dev_trans_start(slave->dev) + |
b2220cad JV |
2971 | delta_in_ticks)) { |
2972 | slave->link = BOND_LINK_UP; | |
2973 | bond_change_active_slave(bond, slave); | |
2974 | bond->current_arp_slave = NULL; | |
2975 | ||
3d632c3f | 2976 | pr_info(DRV_NAME |
b2220cad JV |
2977 | ": %s: %s is up and now the " |
2978 | "active interface\n", | |
2979 | bond->dev->name, slave->dev->name); | |
2980 | ||
2981 | } else if (bond->curr_active_slave != slave) { | |
2982 | /* this slave has just come up but we | |
2983 | * already have a current slave; this can | |
2984 | * also happen if bond_enslave adds a new | |
2985 | * slave that is up while we are searching | |
2986 | * for a new slave | |
1da177e4 | 2987 | */ |
b2220cad JV |
2988 | slave->link = BOND_LINK_UP; |
2989 | bond_set_slave_inactive_flags(slave); | |
2990 | bond->current_arp_slave = NULL; | |
2991 | ||
3d632c3f | 2992 | pr_info(DRV_NAME |
b2220cad JV |
2993 | ": %s: backup interface %s is now up\n", |
2994 | bond->dev->name, slave->dev->name); | |
2995 | } | |
1da177e4 | 2996 | |
b2220cad | 2997 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 | 2998 | |
b2220cad | 2999 | break; |
1da177e4 | 3000 | |
b2220cad JV |
3001 | case BOND_LINK_DOWN: |
3002 | if (slave->link_failure_count < UINT_MAX) | |
3003 | slave->link_failure_count++; | |
3004 | ||
3005 | slave->link = BOND_LINK_DOWN; | |
3006 | ||
3007 | if (slave == bond->curr_active_slave) { | |
3d632c3f | 3008 | pr_info(DRV_NAME |
b2220cad JV |
3009 | ": %s: link status down for active " |
3010 | "interface %s, disabling it\n", | |
3011 | bond->dev->name, slave->dev->name); | |
1da177e4 LT |
3012 | |
3013 | bond_set_slave_inactive_flags(slave); | |
3014 | ||
b2220cad JV |
3015 | write_lock_bh(&bond->curr_slave_lock); |
3016 | ||
3017 | bond_select_active_slave(bond); | |
3018 | if (bond->curr_active_slave) | |
3019 | bond->curr_active_slave->jiffies = | |
3020 | jiffies; | |
3021 | ||
3022 | write_unlock_bh(&bond->curr_slave_lock); | |
3023 | ||
3024 | bond->current_arp_slave = NULL; | |
3025 | ||
3026 | } else if (slave->state == BOND_STATE_BACKUP) { | |
3d632c3f | 3027 | pr_info(DRV_NAME |
1da177e4 | 3028 | ": %s: backup interface %s is now down\n", |
b2220cad JV |
3029 | bond->dev->name, slave->dev->name); |
3030 | ||
3031 | bond_set_slave_inactive_flags(slave); | |
1da177e4 | 3032 | } |
b2220cad JV |
3033 | break; |
3034 | ||
3035 | default: | |
3d632c3f | 3036 | pr_err(DRV_NAME |
b2220cad JV |
3037 | ": %s: impossible: new_link %d on slave %s\n", |
3038 | bond->dev->name, slave->new_link, | |
3039 | slave->dev->name); | |
1da177e4 LT |
3040 | } |
3041 | } | |
3042 | ||
b2220cad JV |
3043 | /* |
3044 | * No race with changes to primary via sysfs, as we hold rtnl. | |
3045 | */ | |
3046 | if (bond->primary_slave && | |
3047 | (bond->primary_slave != bond->curr_active_slave) && | |
3048 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3049 | write_lock_bh(&bond->curr_slave_lock); | |
3050 | bond_change_active_slave(bond, bond->primary_slave); | |
3051 | write_unlock_bh(&bond->curr_slave_lock); | |
3052 | } | |
1da177e4 | 3053 | |
b2220cad JV |
3054 | bond_set_carrier(bond); |
3055 | } | |
1da177e4 | 3056 | |
b2220cad JV |
3057 | /* |
3058 | * Send ARP probes for active-backup mode ARP monitor. | |
3059 | * | |
3060 | * Called with bond->lock held for read. | |
3061 | */ | |
3062 | static void bond_ab_arp_probe(struct bonding *bond) | |
3063 | { | |
3064 | struct slave *slave; | |
3065 | int i; | |
1da177e4 | 3066 | |
b2220cad | 3067 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3068 | |
b2220cad | 3069 | if (bond->current_arp_slave && bond->curr_active_slave) |
3d632c3f | 3070 | pr_info(DRV_NAME "PROBE: c_arp %s && cas %s BAD\n", |
b2220cad JV |
3071 | bond->current_arp_slave->dev->name, |
3072 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3073 | |
b2220cad JV |
3074 | if (bond->curr_active_slave) { |
3075 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3076 | read_unlock(&bond->curr_slave_lock); | |
3077 | return; | |
3078 | } | |
1da177e4 | 3079 | |
b2220cad | 3080 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3081 | |
b2220cad JV |
3082 | /* if we don't have a curr_active_slave, search for the next available |
3083 | * backup slave from the current_arp_slave and make it the candidate | |
3084 | * for becoming the curr_active_slave | |
3085 | */ | |
1da177e4 | 3086 | |
b2220cad JV |
3087 | if (!bond->current_arp_slave) { |
3088 | bond->current_arp_slave = bond->first_slave; | |
3089 | if (!bond->current_arp_slave) | |
3090 | return; | |
3091 | } | |
1da177e4 | 3092 | |
b2220cad | 3093 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3094 | |
b2220cad JV |
3095 | /* search for next candidate */ |
3096 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3097 | if (IS_UP(slave->dev)) { | |
3098 | slave->link = BOND_LINK_BACK; | |
3099 | bond_set_slave_active_flags(slave); | |
3100 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3101 | slave->jiffies = jiffies; |
b2220cad JV |
3102 | bond->current_arp_slave = slave; |
3103 | break; | |
1da177e4 LT |
3104 | } |
3105 | ||
b2220cad JV |
3106 | /* if the link state is up at this point, we |
3107 | * mark it down - this can happen if we have | |
3108 | * simultaneous link failures and | |
3109 | * reselect_active_interface doesn't make this | |
3110 | * one the current slave so it is still marked | |
3111 | * up when it is actually down | |
1da177e4 | 3112 | */ |
b2220cad JV |
3113 | if (slave->link == BOND_LINK_UP) { |
3114 | slave->link = BOND_LINK_DOWN; | |
3115 | if (slave->link_failure_count < UINT_MAX) | |
3116 | slave->link_failure_count++; | |
1da177e4 | 3117 | |
b2220cad JV |
3118 | bond_set_slave_inactive_flags(slave); |
3119 | ||
3d632c3f | 3120 | pr_info(DRV_NAME |
b2220cad JV |
3121 | ": %s: backup interface %s is now down.\n", |
3122 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3123 | } |
b2220cad JV |
3124 | } |
3125 | } | |
1da177e4 | 3126 | |
b2220cad JV |
3127 | void bond_activebackup_arp_mon(struct work_struct *work) |
3128 | { | |
3129 | struct bonding *bond = container_of(work, struct bonding, | |
3130 | arp_work.work); | |
3131 | int delta_in_ticks; | |
1da177e4 | 3132 | |
b2220cad | 3133 | read_lock(&bond->lock); |
1da177e4 | 3134 | |
b2220cad JV |
3135 | if (bond->kill_timers) |
3136 | goto out; | |
1da177e4 | 3137 | |
b2220cad | 3138 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3139 | |
b2220cad JV |
3140 | if (bond->slave_cnt == 0) |
3141 | goto re_arm; | |
3142 | ||
b59f9f74 JV |
3143 | if (bond->send_grat_arp) { |
3144 | read_lock(&bond->curr_slave_lock); | |
3145 | bond_send_gratuitous_arp(bond); | |
3146 | read_unlock(&bond->curr_slave_lock); | |
3147 | } | |
3148 | ||
305d552a BH |
3149 | if (bond->send_unsol_na) { |
3150 | read_lock(&bond->curr_slave_lock); | |
3151 | bond_send_unsolicited_na(bond); | |
3152 | read_unlock(&bond->curr_slave_lock); | |
3153 | } | |
3154 | ||
b2220cad JV |
3155 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3156 | read_unlock(&bond->lock); | |
3157 | rtnl_lock(); | |
3158 | read_lock(&bond->lock); | |
3159 | ||
3160 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3161 | ||
3162 | read_unlock(&bond->lock); | |
3163 | rtnl_unlock(); | |
3164 | read_lock(&bond->lock); | |
1da177e4 LT |
3165 | } |
3166 | ||
b2220cad JV |
3167 | bond_ab_arp_probe(bond); |
3168 | ||
1da177e4 | 3169 | re_arm: |
3d632c3f | 3170 | if (bond->params.arp_interval) |
1b76b316 | 3171 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3172 | out: |
3173 | read_unlock(&bond->lock); | |
3174 | } | |
3175 | ||
3176 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3177 | ||
3178 | #ifdef CONFIG_PROC_FS | |
3179 | ||
1da177e4 | 3180 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
1f78d9f9 HE |
3181 | __acquires(&dev_base_lock) |
3182 | __acquires(&bond->lock) | |
1da177e4 LT |
3183 | { |
3184 | struct bonding *bond = seq->private; | |
3185 | loff_t off = 0; | |
3186 | struct slave *slave; | |
3187 | int i; | |
3188 | ||
3189 | /* make sure the bond won't be taken away */ | |
3190 | read_lock(&dev_base_lock); | |
6603a6f2 | 3191 | read_lock(&bond->lock); |
1da177e4 | 3192 | |
3d632c3f | 3193 | if (*pos == 0) |
1da177e4 | 3194 | return SEQ_START_TOKEN; |
1da177e4 LT |
3195 | |
3196 | bond_for_each_slave(bond, slave, i) { | |
3d632c3f | 3197 | if (++off == *pos) |
1da177e4 | 3198 | return slave; |
1da177e4 LT |
3199 | } |
3200 | ||
3201 | return NULL; | |
3202 | } | |
3203 | ||
3204 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3205 | { | |
3206 | struct bonding *bond = seq->private; | |
3207 | struct slave *slave = v; | |
3208 | ||
3209 | ++*pos; | |
3d632c3f | 3210 | if (v == SEQ_START_TOKEN) |
1da177e4 | 3211 | return bond->first_slave; |
1da177e4 LT |
3212 | |
3213 | slave = slave->next; | |
3214 | ||
3215 | return (slave == bond->first_slave) ? NULL : slave; | |
3216 | } | |
3217 | ||
3218 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
1f78d9f9 HE |
3219 | __releases(&bond->lock) |
3220 | __releases(&dev_base_lock) | |
1da177e4 LT |
3221 | { |
3222 | struct bonding *bond = seq->private; | |
3223 | ||
6603a6f2 | 3224 | read_unlock(&bond->lock); |
1da177e4 LT |
3225 | read_unlock(&dev_base_lock); |
3226 | } | |
3227 | ||
3228 | static void bond_info_show_master(struct seq_file *seq) | |
3229 | { | |
3230 | struct bonding *bond = seq->private; | |
3231 | struct slave *curr; | |
4756b02f | 3232 | int i; |
1da177e4 LT |
3233 | |
3234 | read_lock(&bond->curr_slave_lock); | |
3235 | curr = bond->curr_active_slave; | |
3236 | read_unlock(&bond->curr_slave_lock); | |
3237 | ||
dd957c57 | 3238 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3239 | bond_mode_name(bond->params.mode)); |
3240 | ||
dd957c57 JV |
3241 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3242 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3243 | seq_printf(seq, " (fail_over_mac %s)", |
3244 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3245 | |
3246 | seq_printf(seq, "\n"); | |
3247 | ||
c61b75ad MW |
3248 | if (bond->params.mode == BOND_MODE_XOR || |
3249 | bond->params.mode == BOND_MODE_8023AD) { | |
3250 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3251 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3252 | bond->params.xmit_policy); | |
3253 | } | |
3254 | ||
1da177e4 LT |
3255 | if (USES_PRIMARY(bond->params.mode)) { |
3256 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
3257 | (bond->primary_slave) ? |
3258 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
3259 | |
3260 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3261 | (curr) ? curr->dev->name : "None"); | |
3262 | } | |
3263 | ||
ff59c456 JV |
3264 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3265 | "up" : "down"); | |
1da177e4 LT |
3266 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3267 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3268 | bond->params.updelay * bond->params.miimon); | |
3269 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3270 | bond->params.downdelay * bond->params.miimon); | |
3271 | ||
4756b02f MW |
3272 | |
3273 | /* ARP information */ | |
3d632c3f SH |
3274 | if (bond->params.arp_interval > 0) { |
3275 | int printed = 0; | |
4756b02f MW |
3276 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", |
3277 | bond->params.arp_interval); | |
3278 | ||
3279 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3280 | ||
3d632c3f | 3281 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
4756b02f | 3282 | if (!bond->params.arp_targets[i]) |
5a31bec0 | 3283 | break; |
4756b02f MW |
3284 | if (printed) |
3285 | seq_printf(seq, ","); | |
8cf14e38 | 3286 | seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); |
4756b02f MW |
3287 | printed = 1; |
3288 | } | |
3289 | seq_printf(seq, "\n"); | |
3290 | } | |
3291 | ||
1da177e4 LT |
3292 | if (bond->params.mode == BOND_MODE_8023AD) { |
3293 | struct ad_info ad_info; | |
3294 | ||
3295 | seq_puts(seq, "\n802.3ad info\n"); | |
3296 | seq_printf(seq, "LACP rate: %s\n", | |
3297 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
fd989c83 JV |
3298 | seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", |
3299 | ad_select_tbl[bond->params.ad_select].modename); | |
1da177e4 LT |
3300 | |
3301 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3302 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3303 | bond->dev->name); | |
3304 | } else { | |
3305 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3306 | ||
3307 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3308 | ad_info.aggregator_id); | |
3309 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3310 | ad_info.ports); | |
3311 | seq_printf(seq, "\tActor Key: %d\n", | |
3312 | ad_info.actor_key); | |
3313 | seq_printf(seq, "\tPartner Key: %d\n", | |
3314 | ad_info.partner_key); | |
e174961c JB |
3315 | seq_printf(seq, "\tPartner Mac Address: %pM\n", |
3316 | ad_info.partner_system); | |
1da177e4 LT |
3317 | } |
3318 | } | |
3319 | } | |
3320 | ||
3d632c3f SH |
3321 | static void bond_info_show_slave(struct seq_file *seq, |
3322 | const struct slave *slave) | |
1da177e4 LT |
3323 | { |
3324 | struct bonding *bond = seq->private; | |
3325 | ||
3326 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3327 | seq_printf(seq, "MII Status: %s\n", | |
3328 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3329 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3330 | slave->link_failure_count); |
3331 | ||
e174961c | 3332 | seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); |
1da177e4 LT |
3333 | |
3334 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3335 | const struct aggregator *agg | |
3336 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3337 | ||
3d632c3f | 3338 | if (agg) |
1da177e4 LT |
3339 | seq_printf(seq, "Aggregator ID: %d\n", |
3340 | agg->aggregator_identifier); | |
3d632c3f | 3341 | else |
1da177e4 | 3342 | seq_puts(seq, "Aggregator ID: N/A\n"); |
1da177e4 LT |
3343 | } |
3344 | } | |
3345 | ||
3346 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3347 | { | |
3348 | if (v == SEQ_START_TOKEN) { | |
3349 | seq_printf(seq, "%s\n", version); | |
3350 | bond_info_show_master(seq); | |
3d632c3f | 3351 | } else |
1da177e4 | 3352 | bond_info_show_slave(seq, v); |
1da177e4 LT |
3353 | |
3354 | return 0; | |
3355 | } | |
3356 | ||
4101dec9 | 3357 | static const struct seq_operations bond_info_seq_ops = { |
1da177e4 LT |
3358 | .start = bond_info_seq_start, |
3359 | .next = bond_info_seq_next, | |
3360 | .stop = bond_info_seq_stop, | |
3361 | .show = bond_info_seq_show, | |
3362 | }; | |
3363 | ||
3364 | static int bond_info_open(struct inode *inode, struct file *file) | |
3365 | { | |
3366 | struct seq_file *seq; | |
3367 | struct proc_dir_entry *proc; | |
3368 | int res; | |
3369 | ||
3370 | res = seq_open(file, &bond_info_seq_ops); | |
3371 | if (!res) { | |
3372 | /* recover the pointer buried in proc_dir_entry data */ | |
3373 | seq = file->private_data; | |
3374 | proc = PDE(inode); | |
3375 | seq->private = proc->data; | |
3376 | } | |
3377 | ||
3378 | return res; | |
3379 | } | |
3380 | ||
d54b1fdb | 3381 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3382 | .owner = THIS_MODULE, |
3383 | .open = bond_info_open, | |
3384 | .read = seq_read, | |
3385 | .llseek = seq_lseek, | |
3386 | .release = seq_release, | |
3387 | }; | |
3388 | ||
3389 | static int bond_create_proc_entry(struct bonding *bond) | |
3390 | { | |
3391 | struct net_device *bond_dev = bond->dev; | |
3392 | ||
3393 | if (bond_proc_dir) { | |
a95609cb DL |
3394 | bond->proc_entry = proc_create_data(bond_dev->name, |
3395 | S_IRUGO, bond_proc_dir, | |
3396 | &bond_info_fops, bond); | |
3d632c3f SH |
3397 | if (bond->proc_entry == NULL) |
3398 | pr_warning(DRV_NAME | |
1da177e4 LT |
3399 | ": Warning: Cannot create /proc/net/%s/%s\n", |
3400 | DRV_NAME, bond_dev->name); | |
3d632c3f | 3401 | else |
1da177e4 | 3402 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
1da177e4 LT |
3403 | } |
3404 | ||
3405 | return 0; | |
3406 | } | |
3407 | ||
3408 | static void bond_remove_proc_entry(struct bonding *bond) | |
3409 | { | |
3410 | if (bond_proc_dir && bond->proc_entry) { | |
3411 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3412 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3413 | bond->proc_entry = NULL; | |
3414 | } | |
3415 | } | |
3416 | ||
3417 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3418 | * Caller must hold rtnl_lock. | |
3419 | */ | |
3420 | static void bond_create_proc_dir(void) | |
3421 | { | |
1da177e4 | 3422 | if (!bond_proc_dir) { |
457c4cbc | 3423 | bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net); |
99b76233 | 3424 | if (!bond_proc_dir) |
3d632c3f | 3425 | pr_warning(DRV_NAME |
1da177e4 LT |
3426 | ": Warning: cannot create /proc/net/%s\n", |
3427 | DRV_NAME); | |
1da177e4 LT |
3428 | } |
3429 | } | |
3430 | ||
3431 | /* Destroy the bonding directory under /proc/net, if empty. | |
3432 | * Caller must hold rtnl_lock. | |
3433 | */ | |
3434 | static void bond_destroy_proc_dir(void) | |
3435 | { | |
99b76233 | 3436 | if (bond_proc_dir) { |
457c4cbc | 3437 | remove_proc_entry(DRV_NAME, init_net.proc_net); |
1da177e4 LT |
3438 | bond_proc_dir = NULL; |
3439 | } | |
3440 | } | |
aee64faf JP |
3441 | |
3442 | #else /* !CONFIG_PROC_FS */ | |
3443 | ||
3444 | static int bond_create_proc_entry(struct bonding *bond) | |
3445 | { | |
3446 | } | |
3447 | ||
3448 | static void bond_remove_proc_entry(struct bonding *bond) | |
3449 | { | |
3450 | } | |
3451 | ||
3452 | static void bond_create_proc_dir(void) | |
3453 | { | |
3454 | } | |
3455 | ||
3456 | static void bond_destroy_proc_dir(void) | |
3457 | { | |
3458 | } | |
3459 | ||
1da177e4 LT |
3460 | #endif /* CONFIG_PROC_FS */ |
3461 | ||
aee64faf | 3462 | |
1da177e4 LT |
3463 | /*-------------------------- netdev event handling --------------------------*/ |
3464 | ||
3465 | /* | |
3466 | * Change device name | |
3467 | */ | |
3468 | static int bond_event_changename(struct bonding *bond) | |
3469 | { | |
1da177e4 LT |
3470 | bond_remove_proc_entry(bond); |
3471 | bond_create_proc_entry(bond); | |
7e083840 | 3472 | |
3d632c3f SH |
3473 | bond_destroy_sysfs_entry(bond); |
3474 | bond_create_sysfs_entry(bond); | |
7e083840 | 3475 | |
1da177e4 LT |
3476 | return NOTIFY_DONE; |
3477 | } | |
3478 | ||
3d632c3f SH |
3479 | static int bond_master_netdev_event(unsigned long event, |
3480 | struct net_device *bond_dev) | |
1da177e4 | 3481 | { |
454d7c9b | 3482 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3483 | |
3484 | switch (event) { | |
3485 | case NETDEV_CHANGENAME: | |
3486 | return bond_event_changename(event_bond); | |
3487 | case NETDEV_UNREGISTER: | |
3b96c858 | 3488 | bond_release_all(event_bond->dev); |
1da177e4 LT |
3489 | break; |
3490 | default: | |
3491 | break; | |
3492 | } | |
3493 | ||
3494 | return NOTIFY_DONE; | |
3495 | } | |
3496 | ||
3d632c3f SH |
3497 | static int bond_slave_netdev_event(unsigned long event, |
3498 | struct net_device *slave_dev) | |
1da177e4 LT |
3499 | { |
3500 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3501 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3502 | |
3503 | switch (event) { | |
3504 | case NETDEV_UNREGISTER: | |
3505 | if (bond_dev) { | |
1284cd3a JV |
3506 | if (bond->setup_by_slave) |
3507 | bond_release_and_destroy(bond_dev, slave_dev); | |
3508 | else | |
3509 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3510 | } |
3511 | break; | |
3512 | case NETDEV_CHANGE: | |
17d04500 JV |
3513 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3514 | struct slave *slave; | |
3515 | ||
3516 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3517 | if (slave) { | |
3518 | u16 old_speed = slave->speed; | |
3519 | u16 old_duplex = slave->duplex; | |
3520 | ||
3521 | bond_update_speed_duplex(slave); | |
3522 | ||
3523 | if (bond_is_lb(bond)) | |
3524 | break; | |
3525 | ||
3526 | if (old_speed != slave->speed) | |
3527 | bond_3ad_adapter_speed_changed(slave); | |
3528 | if (old_duplex != slave->duplex) | |
3529 | bond_3ad_adapter_duplex_changed(slave); | |
3530 | } | |
3531 | } | |
3532 | ||
1da177e4 LT |
3533 | break; |
3534 | case NETDEV_DOWN: | |
3535 | /* | |
3536 | * ... Or is it this? | |
3537 | */ | |
3538 | break; | |
3539 | case NETDEV_CHANGEMTU: | |
3540 | /* | |
3541 | * TODO: Should slaves be allowed to | |
3542 | * independently alter their MTU? For | |
3543 | * an active-backup bond, slaves need | |
3544 | * not be the same type of device, so | |
3545 | * MTUs may vary. For other modes, | |
3546 | * slaves arguably should have the | |
3547 | * same MTUs. To do this, we'd need to | |
3548 | * take over the slave's change_mtu | |
3549 | * function for the duration of their | |
3550 | * servitude. | |
3551 | */ | |
3552 | break; | |
3553 | case NETDEV_CHANGENAME: | |
3554 | /* | |
3555 | * TODO: handle changing the primary's name | |
3556 | */ | |
3557 | break; | |
8531c5ff AK |
3558 | case NETDEV_FEAT_CHANGE: |
3559 | bond_compute_features(bond); | |
3560 | break; | |
1da177e4 LT |
3561 | default: |
3562 | break; | |
3563 | } | |
3564 | ||
3565 | return NOTIFY_DONE; | |
3566 | } | |
3567 | ||
3568 | /* | |
3569 | * bond_netdev_event: handle netdev notifier chain events. | |
3570 | * | |
3571 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3572 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3573 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3574 | * dev_probe_lock). | |
3575 | */ | |
3d632c3f SH |
3576 | static int bond_netdev_event(struct notifier_block *this, |
3577 | unsigned long event, void *ptr) | |
1da177e4 LT |
3578 | { |
3579 | struct net_device *event_dev = (struct net_device *)ptr; | |
3580 | ||
c346dca1 | 3581 | if (dev_net(event_dev) != &init_net) |
e9dc8653 EB |
3582 | return NOTIFY_DONE; |
3583 | ||
5a03cdb7 | 3584 | pr_debug("event_dev: %s, event: %lx\n", |
1da177e4 LT |
3585 | (event_dev ? event_dev->name : "None"), |
3586 | event); | |
3587 | ||
0b680e75 JV |
3588 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3589 | return NOTIFY_DONE; | |
3590 | ||
1da177e4 | 3591 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3592 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3593 | return bond_master_netdev_event(event, event_dev); |
3594 | } | |
3595 | ||
3596 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3597 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3598 | return bond_slave_netdev_event(event, event_dev); |
3599 | } | |
3600 | ||
3601 | return NOTIFY_DONE; | |
3602 | } | |
3603 | ||
c3ade5ca JV |
3604 | /* |
3605 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3606 | * | |
3607 | * We keep track of device IPs primarily to use as source addresses in | |
3608 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3609 | * | |
3610 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3611 | */ | |
3612 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3613 | { | |
3614 | struct in_ifaddr *ifa = ptr; | |
3615 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
0883beca PE |
3616 | struct bonding *bond; |
3617 | struct vlan_entry *vlan; | |
c3ade5ca | 3618 | |
c346dca1 | 3619 | if (dev_net(ifa->ifa_dev->dev) != &init_net) |
6133fb1a DL |
3620 | return NOTIFY_DONE; |
3621 | ||
0883beca | 3622 | list_for_each_entry(bond, &bond_dev_list, bond_list) { |
c3ade5ca JV |
3623 | if (bond->dev == event_dev) { |
3624 | switch (event) { | |
3625 | case NETDEV_UP: | |
3626 | bond->master_ip = ifa->ifa_local; | |
3627 | return NOTIFY_OK; | |
3628 | case NETDEV_DOWN: | |
3629 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3630 | return NOTIFY_OK; | |
3631 | default: | |
3632 | return NOTIFY_DONE; | |
3633 | } | |
3634 | } | |
3635 | ||
0883beca | 3636 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 3637 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3638 | if (vlan_dev == event_dev) { |
3639 | switch (event) { | |
3640 | case NETDEV_UP: | |
3641 | vlan->vlan_ip = ifa->ifa_local; | |
3642 | return NOTIFY_OK; | |
3643 | case NETDEV_DOWN: | |
3644 | vlan->vlan_ip = | |
3645 | bond_glean_dev_ip(vlan_dev); | |
3646 | return NOTIFY_OK; | |
3647 | default: | |
3648 | return NOTIFY_DONE; | |
3649 | } | |
3650 | } | |
3651 | } | |
3652 | } | |
3653 | return NOTIFY_DONE; | |
3654 | } | |
3655 | ||
1da177e4 LT |
3656 | static struct notifier_block bond_netdev_notifier = { |
3657 | .notifier_call = bond_netdev_event, | |
3658 | }; | |
3659 | ||
c3ade5ca JV |
3660 | static struct notifier_block bond_inetaddr_notifier = { |
3661 | .notifier_call = bond_inetaddr_event, | |
3662 | }; | |
3663 | ||
1da177e4 LT |
3664 | /*-------------------------- Packet type handling ---------------------------*/ |
3665 | ||
3666 | /* register to receive lacpdus on a bond */ | |
3667 | static void bond_register_lacpdu(struct bonding *bond) | |
3668 | { | |
3669 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3670 | ||
3671 | /* initialize packet type */ | |
3672 | pk_type->type = PKT_TYPE_LACPDU; | |
3673 | pk_type->dev = bond->dev; | |
3674 | pk_type->func = bond_3ad_lacpdu_recv; | |
3675 | ||
3676 | dev_add_pack(pk_type); | |
3677 | } | |
3678 | ||
3679 | /* unregister to receive lacpdus on a bond */ | |
3680 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3681 | { | |
3682 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3683 | } | |
3684 | ||
f5b2b966 JV |
3685 | void bond_register_arp(struct bonding *bond) |
3686 | { | |
3687 | struct packet_type *pt = &bond->arp_mon_pt; | |
3688 | ||
c4f283b1 JV |
3689 | if (pt->type) |
3690 | return; | |
3691 | ||
f5b2b966 | 3692 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3693 | pt->dev = bond->dev; |
f5b2b966 JV |
3694 | pt->func = bond_arp_rcv; |
3695 | dev_add_pack(pt); | |
3696 | } | |
3697 | ||
3698 | void bond_unregister_arp(struct bonding *bond) | |
3699 | { | |
c4f283b1 JV |
3700 | struct packet_type *pt = &bond->arp_mon_pt; |
3701 | ||
3702 | dev_remove_pack(pt); | |
3703 | pt->type = 0; | |
f5b2b966 JV |
3704 | } |
3705 | ||
169a3e66 JV |
3706 | /*---------------------------- Hashing Policies -----------------------------*/ |
3707 | ||
6f6652be JV |
3708 | /* |
3709 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3710 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3711 | */ | |
3712 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, | |
3713 | struct net_device *bond_dev, int count) | |
3714 | { | |
3715 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3716 | struct iphdr *iph = ip_hdr(skb); | |
3717 | ||
f14c4e4e | 3718 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be JV |
3719 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
3720 | (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count; | |
3721 | } | |
3722 | ||
3723 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3724 | } | |
3725 | ||
169a3e66 | 3726 | /* |
59c51591 | 3727 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3728 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3729 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3730 | */ | |
3731 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3732 | struct net_device *bond_dev, int count) | |
3733 | { | |
3734 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3735 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3736 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3737 | int layer4_xor = 0; |
3738 | ||
f14c4e4e BH |
3739 | if (skb->protocol == htons(ETH_P_IP)) { |
3740 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3741 | (iph->protocol == IPPROTO_TCP || |
3742 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3743 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3744 | } |
3745 | return (layer4_xor ^ | |
3746 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3747 | ||
3748 | } | |
3749 | ||
3750 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3751 | } | |
3752 | ||
3753 | /* | |
3754 | * Hash for the output device based upon layer 2 data | |
3755 | */ | |
3756 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3757 | struct net_device *bond_dev, int count) | |
3758 | { | |
3759 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3760 | ||
3761 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3762 | } | |
3763 | ||
1da177e4 LT |
3764 | /*-------------------------- Device entry points ----------------------------*/ |
3765 | ||
3766 | static int bond_open(struct net_device *bond_dev) | |
3767 | { | |
454d7c9b | 3768 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3769 | |
3770 | bond->kill_timers = 0; | |
3771 | ||
58402054 | 3772 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3773 | /* bond_alb_initialize must be called before the timer |
3774 | * is started. | |
3775 | */ | |
3776 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3777 | /* something went wrong - fail the open operation */ | |
3778 | return -1; | |
3779 | } | |
3780 | ||
1b76b316 JV |
3781 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3782 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3783 | } |
3784 | ||
3785 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3786 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3787 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3788 | } |
3789 | ||
3790 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3791 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3792 | INIT_DELAYED_WORK(&bond->arp_work, | |
3793 | bond_activebackup_arp_mon); | |
3794 | else | |
3795 | INIT_DELAYED_WORK(&bond->arp_work, | |
3796 | bond_loadbalance_arp_mon); | |
3797 | ||
3798 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3799 | if (bond->params.arp_validate) |
3800 | bond_register_arp(bond); | |
1da177e4 LT |
3801 | } |
3802 | ||
3803 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3804 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3805 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3806 | /* register to receive LACPDUs */ |
3807 | bond_register_lacpdu(bond); | |
fd989c83 | 3808 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3809 | } |
3810 | ||
3811 | return 0; | |
3812 | } | |
3813 | ||
3814 | static int bond_close(struct net_device *bond_dev) | |
3815 | { | |
454d7c9b | 3816 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3817 | |
3818 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3819 | /* Unregister the receive of LACPDUs */ | |
3820 | bond_unregister_lacpdu(bond); | |
3821 | } | |
3822 | ||
f5b2b966 JV |
3823 | if (bond->params.arp_validate) |
3824 | bond_unregister_arp(bond); | |
3825 | ||
1da177e4 LT |
3826 | write_lock_bh(&bond->lock); |
3827 | ||
b59f9f74 | 3828 | bond->send_grat_arp = 0; |
305d552a | 3829 | bond->send_unsol_na = 0; |
1da177e4 LT |
3830 | |
3831 | /* signal timers not to re-arm */ | |
3832 | bond->kill_timers = 1; | |
3833 | ||
3834 | write_unlock_bh(&bond->lock); | |
3835 | ||
1da177e4 | 3836 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3837 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3838 | } |
3839 | ||
3840 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3841 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3842 | } |
3843 | ||
3844 | switch (bond->params.mode) { | |
3845 | case BOND_MODE_8023AD: | |
1b76b316 | 3846 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3847 | break; |
3848 | case BOND_MODE_TLB: | |
3849 | case BOND_MODE_ALB: | |
1b76b316 | 3850 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3851 | break; |
3852 | default: | |
3853 | break; | |
3854 | } | |
3855 | ||
1da177e4 | 3856 | |
58402054 | 3857 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3858 | /* Must be called only after all |
3859 | * slaves have been released | |
3860 | */ | |
3861 | bond_alb_deinitialize(bond); | |
3862 | } | |
3863 | ||
3864 | return 0; | |
3865 | } | |
3866 | ||
3867 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3868 | { | |
454d7c9b | 3869 | struct bonding *bond = netdev_priv(bond_dev); |
eeda3fd6 | 3870 | struct net_device_stats *stats = &bond->stats; |
2439f9eb | 3871 | struct net_device_stats local_stats; |
1da177e4 LT |
3872 | struct slave *slave; |
3873 | int i; | |
3874 | ||
2439f9eb | 3875 | memset(&local_stats, 0, sizeof(struct net_device_stats)); |
1da177e4 LT |
3876 | |
3877 | read_lock_bh(&bond->lock); | |
3878 | ||
3879 | bond_for_each_slave(bond, slave, i) { | |
eeda3fd6 SH |
3880 | const struct net_device_stats *sstats = dev_get_stats(slave->dev); |
3881 | ||
2439f9eb AG |
3882 | local_stats.rx_packets += sstats->rx_packets; |
3883 | local_stats.rx_bytes += sstats->rx_bytes; | |
3884 | local_stats.rx_errors += sstats->rx_errors; | |
3885 | local_stats.rx_dropped += sstats->rx_dropped; | |
3886 | ||
3887 | local_stats.tx_packets += sstats->tx_packets; | |
3888 | local_stats.tx_bytes += sstats->tx_bytes; | |
3889 | local_stats.tx_errors += sstats->tx_errors; | |
3890 | local_stats.tx_dropped += sstats->tx_dropped; | |
3891 | ||
3892 | local_stats.multicast += sstats->multicast; | |
3893 | local_stats.collisions += sstats->collisions; | |
3894 | ||
3895 | local_stats.rx_length_errors += sstats->rx_length_errors; | |
3896 | local_stats.rx_over_errors += sstats->rx_over_errors; | |
3897 | local_stats.rx_crc_errors += sstats->rx_crc_errors; | |
3898 | local_stats.rx_frame_errors += sstats->rx_frame_errors; | |
3899 | local_stats.rx_fifo_errors += sstats->rx_fifo_errors; | |
3900 | local_stats.rx_missed_errors += sstats->rx_missed_errors; | |
3901 | ||
3902 | local_stats.tx_aborted_errors += sstats->tx_aborted_errors; | |
3903 | local_stats.tx_carrier_errors += sstats->tx_carrier_errors; | |
3904 | local_stats.tx_fifo_errors += sstats->tx_fifo_errors; | |
3905 | local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3906 | local_stats.tx_window_errors += sstats->tx_window_errors; | |
3907 | } | |
3908 | ||
3909 | memcpy(stats, &local_stats, sizeof(struct net_device_stats)); | |
1da177e4 LT |
3910 | |
3911 | read_unlock_bh(&bond->lock); | |
3912 | ||
3913 | return stats; | |
3914 | } | |
3915 | ||
3916 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3917 | { | |
3918 | struct net_device *slave_dev = NULL; | |
3919 | struct ifbond k_binfo; | |
3920 | struct ifbond __user *u_binfo = NULL; | |
3921 | struct ifslave k_sinfo; | |
3922 | struct ifslave __user *u_sinfo = NULL; | |
3923 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3924 | int res = 0; |
3925 | ||
5a03cdb7 | 3926 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", |
1da177e4 LT |
3927 | bond_dev->name, cmd); |
3928 | ||
3929 | switch (cmd) { | |
1da177e4 LT |
3930 | case SIOCGMIIPHY: |
3931 | mii = if_mii(ifr); | |
3d632c3f | 3932 | if (!mii) |
1da177e4 | 3933 | return -EINVAL; |
3d632c3f | 3934 | |
1da177e4 LT |
3935 | mii->phy_id = 0; |
3936 | /* Fall Through */ | |
3937 | case SIOCGMIIREG: | |
3938 | /* | |
3939 | * We do this again just in case we were called by SIOCGMIIREG | |
3940 | * instead of SIOCGMIIPHY. | |
3941 | */ | |
3942 | mii = if_mii(ifr); | |
3d632c3f | 3943 | if (!mii) |
1da177e4 | 3944 | return -EINVAL; |
3d632c3f | 3945 | |
1da177e4 LT |
3946 | |
3947 | if (mii->reg_num == 1) { | |
454d7c9b | 3948 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3949 | mii->val_out = 0; |
6603a6f2 | 3950 | read_lock(&bond->lock); |
1da177e4 | 3951 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3952 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3953 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3954 | |
1da177e4 | 3955 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3956 | read_unlock(&bond->lock); |
1da177e4 LT |
3957 | } |
3958 | ||
3959 | return 0; | |
3960 | case BOND_INFO_QUERY_OLD: | |
3961 | case SIOCBONDINFOQUERY: | |
3962 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3963 | ||
3d632c3f | 3964 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3965 | return -EFAULT; |
1da177e4 LT |
3966 | |
3967 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3968 | if (res == 0 && |
3969 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3970 | return -EFAULT; | |
1da177e4 LT |
3971 | |
3972 | return res; | |
3973 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3974 | case SIOCBONDSLAVEINFOQUERY: | |
3975 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3976 | ||
3d632c3f | 3977 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3978 | return -EFAULT; |
1da177e4 LT |
3979 | |
3980 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3981 | if (res == 0 && |
3982 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3983 | return -EFAULT; | |
1da177e4 LT |
3984 | |
3985 | return res; | |
3986 | default: | |
3987 | /* Go on */ | |
3988 | break; | |
3989 | } | |
3990 | ||
3d632c3f | 3991 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3992 | return -EPERM; |
1da177e4 | 3993 | |
881d966b | 3994 | slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave); |
1da177e4 | 3995 | |
5a03cdb7 | 3996 | pr_debug("slave_dev=%p: \n", slave_dev); |
1da177e4 | 3997 | |
3d632c3f | 3998 | if (!slave_dev) |
1da177e4 | 3999 | res = -ENODEV; |
3d632c3f | 4000 | else { |
5a03cdb7 | 4001 | pr_debug("slave_dev->name=%s: \n", slave_dev->name); |
1da177e4 LT |
4002 | switch (cmd) { |
4003 | case BOND_ENSLAVE_OLD: | |
4004 | case SIOCBONDENSLAVE: | |
4005 | res = bond_enslave(bond_dev, slave_dev); | |
4006 | break; | |
4007 | case BOND_RELEASE_OLD: | |
4008 | case SIOCBONDRELEASE: | |
4009 | res = bond_release(bond_dev, slave_dev); | |
4010 | break; | |
4011 | case BOND_SETHWADDR_OLD: | |
4012 | case SIOCBONDSETHWADDR: | |
4013 | res = bond_sethwaddr(bond_dev, slave_dev); | |
4014 | break; | |
4015 | case BOND_CHANGE_ACTIVE_OLD: | |
4016 | case SIOCBONDCHANGEACTIVE: | |
4017 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
4018 | break; | |
4019 | default: | |
4020 | res = -EOPNOTSUPP; | |
4021 | } | |
4022 | ||
4023 | dev_put(slave_dev); | |
4024 | } | |
4025 | ||
1da177e4 LT |
4026 | return res; |
4027 | } | |
4028 | ||
4029 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
4030 | { | |
454d7c9b | 4031 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4032 | struct dev_mc_list *dmi; |
4033 | ||
1da177e4 LT |
4034 | /* |
4035 | * Do promisc before checking multicast_mode | |
4036 | */ | |
3d632c3f | 4037 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
4038 | /* |
4039 | * FIXME: Need to handle the error when one of the multi-slaves | |
4040 | * encounters error. | |
4041 | */ | |
1da177e4 | 4042 | bond_set_promiscuity(bond, 1); |
1da177e4 | 4043 | |
3d632c3f SH |
4044 | |
4045 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 4046 | bond_set_promiscuity(bond, -1); |
3d632c3f | 4047 | |
1da177e4 LT |
4048 | |
4049 | /* set allmulti flag to slaves */ | |
3d632c3f | 4050 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
4051 | /* |
4052 | * FIXME: Need to handle the error when one of the multi-slaves | |
4053 | * encounters error. | |
4054 | */ | |
1da177e4 | 4055 | bond_set_allmulti(bond, 1); |
1da177e4 | 4056 | |
3d632c3f SH |
4057 | |
4058 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 4059 | bond_set_allmulti(bond, -1); |
3d632c3f | 4060 | |
1da177e4 | 4061 | |
80ee5ad2 JV |
4062 | read_lock(&bond->lock); |
4063 | ||
1da177e4 LT |
4064 | bond->flags = bond_dev->flags; |
4065 | ||
4066 | /* looking for addresses to add to slaves' mc list */ | |
4067 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
3d632c3f | 4068 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) |
1da177e4 | 4069 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); |
1da177e4 LT |
4070 | } |
4071 | ||
4072 | /* looking for addresses to delete from slaves' list */ | |
4073 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
3d632c3f | 4074 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) |
1da177e4 | 4075 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); |
1da177e4 LT |
4076 | } |
4077 | ||
4078 | /* save master's multicast list */ | |
4079 | bond_mc_list_destroy(bond); | |
4080 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
4081 | ||
80ee5ad2 | 4082 | read_unlock(&bond->lock); |
1da177e4 LT |
4083 | } |
4084 | ||
00829823 SH |
4085 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
4086 | { | |
4087 | struct bonding *bond = netdev_priv(dev); | |
4088 | struct slave *slave = bond->first_slave; | |
4089 | ||
4090 | if (slave) { | |
4091 | const struct net_device_ops *slave_ops | |
4092 | = slave->dev->netdev_ops; | |
4093 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 4094 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
4095 | } |
4096 | return 0; | |
4097 | } | |
4098 | ||
1da177e4 LT |
4099 | /* |
4100 | * Change the MTU of all of a master's slaves to match the master | |
4101 | */ | |
4102 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4103 | { | |
454d7c9b | 4104 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4105 | struct slave *slave, *stop_at; |
4106 | int res = 0; | |
4107 | int i; | |
4108 | ||
5a03cdb7 | 4109 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
1da177e4 LT |
4110 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
4111 | ||
4112 | /* Can't hold bond->lock with bh disabled here since | |
4113 | * some base drivers panic. On the other hand we can't | |
4114 | * hold bond->lock without bh disabled because we'll | |
4115 | * deadlock. The only solution is to rely on the fact | |
4116 | * that we're under rtnl_lock here, and the slaves | |
4117 | * list won't change. This doesn't solve the problem | |
4118 | * of setting the slave's MTU while it is | |
4119 | * transmitting, but the assumption is that the base | |
4120 | * driver can handle that. | |
4121 | * | |
4122 | * TODO: figure out a way to safely iterate the slaves | |
4123 | * list, but without holding a lock around the actual | |
4124 | * call to the base driver. | |
4125 | */ | |
4126 | ||
4127 | bond_for_each_slave(bond, slave, i) { | |
5a03cdb7 | 4128 | pr_debug("s %p s->p %p c_m %p\n", slave, |
53a3294e | 4129 | slave->prev, slave->dev->netdev_ops->ndo_change_mtu); |
e944ef79 | 4130 | |
1da177e4 LT |
4131 | res = dev_set_mtu(slave->dev, new_mtu); |
4132 | ||
4133 | if (res) { | |
4134 | /* If we failed to set the slave's mtu to the new value | |
4135 | * we must abort the operation even in ACTIVE_BACKUP | |
4136 | * mode, because if we allow the backup slaves to have | |
4137 | * different mtu values than the active slave we'll | |
4138 | * need to change their mtu when doing a failover. That | |
4139 | * means changing their mtu from timer context, which | |
4140 | * is probably not a good idea. | |
4141 | */ | |
5a03cdb7 | 4142 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4143 | goto unwind; |
4144 | } | |
4145 | } | |
4146 | ||
4147 | bond_dev->mtu = new_mtu; | |
4148 | ||
4149 | return 0; | |
4150 | ||
4151 | unwind: | |
4152 | /* unwind from head to the slave that failed */ | |
4153 | stop_at = slave; | |
4154 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4155 | int tmp_res; | |
4156 | ||
4157 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4158 | if (tmp_res) { | |
5a03cdb7 | 4159 | pr_debug("unwind err %d dev %s\n", tmp_res, |
1da177e4 LT |
4160 | slave->dev->name); |
4161 | } | |
4162 | } | |
4163 | ||
4164 | return res; | |
4165 | } | |
4166 | ||
4167 | /* | |
4168 | * Change HW address | |
4169 | * | |
4170 | * Note that many devices must be down to change the HW address, and | |
4171 | * downing the master releases all slaves. We can make bonds full of | |
4172 | * bonding devices to test this, however. | |
4173 | */ | |
4174 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4175 | { | |
454d7c9b | 4176 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4177 | struct sockaddr *sa = addr, tmp_sa; |
4178 | struct slave *slave, *stop_at; | |
4179 | int res = 0; | |
4180 | int i; | |
4181 | ||
eb7cc59a SH |
4182 | if (bond->params.mode == BOND_MODE_ALB) |
4183 | return bond_alb_set_mac_address(bond_dev, addr); | |
4184 | ||
4185 | ||
5a03cdb7 | 4186 | pr_debug("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); |
1da177e4 | 4187 | |
dd957c57 | 4188 | /* |
3915c1e8 JV |
4189 | * If fail_over_mac is set to active, do nothing and return |
4190 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4191 | */ |
3915c1e8 | 4192 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4193 | return 0; |
2ab82852 | 4194 | |
3d632c3f | 4195 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 4196 | return -EADDRNOTAVAIL; |
1da177e4 LT |
4197 | |
4198 | /* Can't hold bond->lock with bh disabled here since | |
4199 | * some base drivers panic. On the other hand we can't | |
4200 | * hold bond->lock without bh disabled because we'll | |
4201 | * deadlock. The only solution is to rely on the fact | |
4202 | * that we're under rtnl_lock here, and the slaves | |
4203 | * list won't change. This doesn't solve the problem | |
4204 | * of setting the slave's hw address while it is | |
4205 | * transmitting, but the assumption is that the base | |
4206 | * driver can handle that. | |
4207 | * | |
4208 | * TODO: figure out a way to safely iterate the slaves | |
4209 | * list, but without holding a lock around the actual | |
4210 | * call to the base driver. | |
4211 | */ | |
4212 | ||
4213 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 4214 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 4215 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 4216 | |
eb7cc59a | 4217 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 4218 | res = -EOPNOTSUPP; |
5a03cdb7 | 4219 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
4220 | goto unwind; |
4221 | } | |
4222 | ||
4223 | res = dev_set_mac_address(slave->dev, addr); | |
4224 | if (res) { | |
4225 | /* TODO: consider downing the slave | |
4226 | * and retry ? | |
4227 | * User should expect communications | |
4228 | * breakage anyway until ARP finish | |
4229 | * updating, so... | |
4230 | */ | |
5a03cdb7 | 4231 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4232 | goto unwind; |
4233 | } | |
4234 | } | |
4235 | ||
4236 | /* success */ | |
4237 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4238 | return 0; | |
4239 | ||
4240 | unwind: | |
4241 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4242 | tmp_sa.sa_family = bond_dev->type; | |
4243 | ||
4244 | /* unwind from head to the slave that failed */ | |
4245 | stop_at = slave; | |
4246 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4247 | int tmp_res; | |
4248 | ||
4249 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4250 | if (tmp_res) { | |
5a03cdb7 | 4251 | pr_debug("unwind err %d dev %s\n", tmp_res, |
1da177e4 LT |
4252 | slave->dev->name); |
4253 | } | |
4254 | } | |
4255 | ||
4256 | return res; | |
4257 | } | |
4258 | ||
4259 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4260 | { | |
454d7c9b | 4261 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4262 | struct slave *slave, *start_at; |
cf5f9044 | 4263 | int i, slave_no, res = 1; |
1da177e4 LT |
4264 | |
4265 | read_lock(&bond->lock); | |
4266 | ||
3d632c3f | 4267 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4268 | goto out; |
1da177e4 | 4269 | |
cf5f9044 JV |
4270 | /* |
4271 | * Concurrent TX may collide on rr_tx_counter; we accept that | |
4272 | * as being rare enough not to justify using an atomic op here | |
4273 | */ | |
4274 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
1da177e4 | 4275 | |
cf5f9044 JV |
4276 | bond_for_each_slave(bond, slave, i) { |
4277 | slave_no--; | |
3d632c3f | 4278 | if (slave_no < 0) |
cf5f9044 | 4279 | break; |
1da177e4 LT |
4280 | } |
4281 | ||
cf5f9044 | 4282 | start_at = slave; |
1da177e4 LT |
4283 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4284 | if (IS_UP(slave->dev) && | |
4285 | (slave->link == BOND_LINK_UP) && | |
4286 | (slave->state == BOND_STATE_ACTIVE)) { | |
4287 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4288 | break; |
4289 | } | |
4290 | } | |
4291 | ||
1da177e4 LT |
4292 | out: |
4293 | if (res) { | |
4294 | /* no suitable interface, frame not sent */ | |
4295 | dev_kfree_skb(skb); | |
4296 | } | |
4297 | read_unlock(&bond->lock); | |
ec634fe3 | 4298 | return NETDEV_TX_OK; |
1da177e4 LT |
4299 | } |
4300 | ||
075897ce | 4301 | |
1da177e4 LT |
4302 | /* |
4303 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4304 | * the bond has a usable interface. | |
4305 | */ | |
4306 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4307 | { | |
454d7c9b | 4308 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4309 | int res = 1; |
4310 | ||
1da177e4 LT |
4311 | read_lock(&bond->lock); |
4312 | read_lock(&bond->curr_slave_lock); | |
4313 | ||
3d632c3f | 4314 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4315 | goto out; |
1da177e4 | 4316 | |
075897ce JL |
4317 | if (!bond->curr_active_slave) |
4318 | goto out; | |
4319 | ||
075897ce JL |
4320 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4321 | ||
1da177e4 | 4322 | out: |
3d632c3f | 4323 | if (res) |
1da177e4 LT |
4324 | /* no suitable interface, frame not sent */ |
4325 | dev_kfree_skb(skb); | |
3d632c3f | 4326 | |
1da177e4 LT |
4327 | read_unlock(&bond->curr_slave_lock); |
4328 | read_unlock(&bond->lock); | |
ec634fe3 | 4329 | return NETDEV_TX_OK; |
1da177e4 LT |
4330 | } |
4331 | ||
4332 | /* | |
169a3e66 JV |
4333 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4334 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4335 | * find the next active slave. | |
1da177e4 LT |
4336 | */ |
4337 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4338 | { | |
454d7c9b | 4339 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4340 | struct slave *slave, *start_at; |
4341 | int slave_no; | |
4342 | int i; | |
4343 | int res = 1; | |
4344 | ||
4345 | read_lock(&bond->lock); | |
4346 | ||
3d632c3f | 4347 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4348 | goto out; |
1da177e4 | 4349 | |
169a3e66 | 4350 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
4351 | |
4352 | bond_for_each_slave(bond, slave, i) { | |
4353 | slave_no--; | |
3d632c3f | 4354 | if (slave_no < 0) |
1da177e4 | 4355 | break; |
1da177e4 LT |
4356 | } |
4357 | ||
4358 | start_at = slave; | |
4359 | ||
4360 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4361 | if (IS_UP(slave->dev) && | |
4362 | (slave->link == BOND_LINK_UP) && | |
4363 | (slave->state == BOND_STATE_ACTIVE)) { | |
4364 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4365 | break; | |
4366 | } | |
4367 | } | |
4368 | ||
4369 | out: | |
4370 | if (res) { | |
4371 | /* no suitable interface, frame not sent */ | |
4372 | dev_kfree_skb(skb); | |
4373 | } | |
4374 | read_unlock(&bond->lock); | |
ec634fe3 | 4375 | return NETDEV_TX_OK; |
1da177e4 LT |
4376 | } |
4377 | ||
4378 | /* | |
4379 | * in broadcast mode, we send everything to all usable interfaces. | |
4380 | */ | |
4381 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4382 | { | |
454d7c9b | 4383 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4384 | struct slave *slave, *start_at; |
4385 | struct net_device *tx_dev = NULL; | |
4386 | int i; | |
4387 | int res = 1; | |
4388 | ||
4389 | read_lock(&bond->lock); | |
4390 | ||
3d632c3f | 4391 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4392 | goto out; |
1da177e4 LT |
4393 | |
4394 | read_lock(&bond->curr_slave_lock); | |
4395 | start_at = bond->curr_active_slave; | |
4396 | read_unlock(&bond->curr_slave_lock); | |
4397 | ||
3d632c3f | 4398 | if (!start_at) |
1da177e4 | 4399 | goto out; |
1da177e4 LT |
4400 | |
4401 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4402 | if (IS_UP(slave->dev) && | |
4403 | (slave->link == BOND_LINK_UP) && | |
4404 | (slave->state == BOND_STATE_ACTIVE)) { | |
4405 | if (tx_dev) { | |
4406 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4407 | if (!skb2) { | |
3d632c3f | 4408 | pr_err(DRV_NAME |
4e0952c7 MW |
4409 | ": %s: Error: bond_xmit_broadcast(): " |
4410 | "skb_clone() failed\n", | |
4411 | bond_dev->name); | |
1da177e4 LT |
4412 | continue; |
4413 | } | |
4414 | ||
4415 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4416 | if (res) { | |
4417 | dev_kfree_skb(skb2); | |
4418 | continue; | |
4419 | } | |
4420 | } | |
4421 | tx_dev = slave->dev; | |
4422 | } | |
4423 | } | |
4424 | ||
3d632c3f | 4425 | if (tx_dev) |
1da177e4 | 4426 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4427 | |
4428 | out: | |
3d632c3f | 4429 | if (res) |
1da177e4 LT |
4430 | /* no suitable interface, frame not sent */ |
4431 | dev_kfree_skb(skb); | |
3d632c3f | 4432 | |
1da177e4 LT |
4433 | /* frame sent to all suitable interfaces */ |
4434 | read_unlock(&bond->lock); | |
ec634fe3 | 4435 | return NETDEV_TX_OK; |
1da177e4 LT |
4436 | } |
4437 | ||
4438 | /*------------------------- Device initialization ---------------------------*/ | |
4439 | ||
6f6652be JV |
4440 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4441 | { | |
4442 | switch (bond->params.xmit_policy) { | |
4443 | case BOND_XMIT_POLICY_LAYER23: | |
4444 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4445 | break; | |
4446 | case BOND_XMIT_POLICY_LAYER34: | |
4447 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4448 | break; | |
4449 | case BOND_XMIT_POLICY_LAYER2: | |
4450 | default: | |
4451 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4452 | break; | |
4453 | } | |
4454 | } | |
4455 | ||
424efe9c | 4456 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 SH |
4457 | { |
4458 | const struct bonding *bond = netdev_priv(dev); | |
4459 | ||
4460 | switch (bond->params.mode) { | |
4461 | case BOND_MODE_ROUNDROBIN: | |
4462 | return bond_xmit_roundrobin(skb, dev); | |
4463 | case BOND_MODE_ACTIVEBACKUP: | |
4464 | return bond_xmit_activebackup(skb, dev); | |
4465 | case BOND_MODE_XOR: | |
4466 | return bond_xmit_xor(skb, dev); | |
4467 | case BOND_MODE_BROADCAST: | |
4468 | return bond_xmit_broadcast(skb, dev); | |
4469 | case BOND_MODE_8023AD: | |
4470 | return bond_3ad_xmit_xor(skb, dev); | |
4471 | case BOND_MODE_ALB: | |
4472 | case BOND_MODE_TLB: | |
4473 | return bond_alb_xmit(skb, dev); | |
4474 | default: | |
4475 | /* Should never happen, mode already checked */ | |
3d632c3f | 4476 | pr_err(DRV_NAME ": %s: Error: Unknown bonding mode %d\n", |
00829823 SH |
4477 | dev->name, bond->params.mode); |
4478 | WARN_ON_ONCE(1); | |
4479 | dev_kfree_skb(skb); | |
4480 | return NETDEV_TX_OK; | |
4481 | } | |
4482 | } | |
4483 | ||
4484 | ||
1da177e4 LT |
4485 | /* |
4486 | * set bond mode specific net device operations | |
4487 | */ | |
a77b5325 | 4488 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4489 | { |
169a3e66 JV |
4490 | struct net_device *bond_dev = bond->dev; |
4491 | ||
1da177e4 LT |
4492 | switch (mode) { |
4493 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4494 | break; |
4495 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4496 | break; |
4497 | case BOND_MODE_XOR: | |
6f6652be | 4498 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4499 | break; |
4500 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4501 | break; |
4502 | case BOND_MODE_8023AD: | |
8f903c70 | 4503 | bond_set_master_3ad_flags(bond); |
6f6652be | 4504 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4505 | break; |
1da177e4 | 4506 | case BOND_MODE_ALB: |
8f903c70 JV |
4507 | bond_set_master_alb_flags(bond); |
4508 | /* FALLTHRU */ | |
4509 | case BOND_MODE_TLB: | |
1da177e4 LT |
4510 | break; |
4511 | default: | |
4512 | /* Should never happen, mode already checked */ | |
3d632c3f | 4513 | pr_err(DRV_NAME |
4e0952c7 MW |
4514 | ": %s: Error: Unknown bonding mode %d\n", |
4515 | bond_dev->name, | |
1da177e4 LT |
4516 | mode); |
4517 | break; | |
4518 | } | |
4519 | } | |
4520 | ||
217df670 JV |
4521 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4522 | struct ethtool_drvinfo *drvinfo) | |
4523 | { | |
4524 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4525 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4526 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4527 | } | |
4528 | ||
7282d491 | 4529 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4530 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4531 | .get_link = ethtool_op_get_link, |
4532 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4533 | .get_sg = ethtool_op_get_sg, | |
4534 | .get_tso = ethtool_op_get_tso, | |
4535 | .get_ufo = ethtool_op_get_ufo, | |
4536 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4537 | }; |
4538 | ||
eb7cc59a | 4539 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4540 | .ndo_init = bond_init, |
9e71626c | 4541 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4542 | .ndo_open = bond_open, |
4543 | .ndo_stop = bond_close, | |
00829823 | 4544 | .ndo_start_xmit = bond_start_xmit, |
eb7cc59a SH |
4545 | .ndo_get_stats = bond_get_stats, |
4546 | .ndo_do_ioctl = bond_do_ioctl, | |
4547 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4548 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4549 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4550 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4551 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4552 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4553 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
4554 | }; | |
4555 | ||
181470fc | 4556 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4557 | { |
454d7c9b | 4558 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4559 | |
1da177e4 LT |
4560 | /* initialize rwlocks */ |
4561 | rwlock_init(&bond->lock); | |
4562 | rwlock_init(&bond->curr_slave_lock); | |
4563 | ||
d2991f75 | 4564 | bond->params = bonding_defaults; |
1da177e4 LT |
4565 | |
4566 | /* Initialize pointers */ | |
1da177e4 LT |
4567 | bond->dev = bond_dev; |
4568 | INIT_LIST_HEAD(&bond->vlan_list); | |
4569 | ||
4570 | /* Initialize the device entry points */ | |
181470fc | 4571 | ether_setup(bond_dev); |
eb7cc59a | 4572 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4573 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4574 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4575 | |
9e71626c | 4576 | bond_dev->destructor = free_netdev; |
1da177e4 LT |
4577 | |
4578 | /* Initialize the device options */ | |
4579 | bond_dev->tx_queue_len = 0; | |
4580 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4581 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4582 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4583 | ||
6cf3f41e JV |
4584 | if (bond->params.arp_interval) |
4585 | bond_dev->priv_flags |= IFF_MASTER_ARPMON; | |
1da177e4 LT |
4586 | |
4587 | /* At first, we block adding VLANs. That's the only way to | |
4588 | * prevent problems that occur when adding VLANs over an | |
4589 | * empty bond. The block will be removed once non-challenged | |
4590 | * slaves are enslaved. | |
4591 | */ | |
4592 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4593 | ||
932ff279 | 4594 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4595 | * transmitting */ |
4596 | bond_dev->features |= NETIF_F_LLTX; | |
4597 | ||
4598 | /* By default, we declare the bond to be fully | |
4599 | * VLAN hardware accelerated capable. Special | |
4600 | * care is taken in the various xmit functions | |
4601 | * when there are slaves that are not hw accel | |
4602 | * capable | |
4603 | */ | |
1da177e4 LT |
4604 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4605 | NETIF_F_HW_VLAN_RX | | |
4606 | NETIF_F_HW_VLAN_FILTER); | |
4607 | ||
1da177e4 LT |
4608 | } |
4609 | ||
fdaea7a9 JV |
4610 | static void bond_work_cancel_all(struct bonding *bond) |
4611 | { | |
4612 | write_lock_bh(&bond->lock); | |
4613 | bond->kill_timers = 1; | |
4614 | write_unlock_bh(&bond->lock); | |
4615 | ||
4616 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4617 | cancel_delayed_work(&bond->mii_work); | |
4618 | ||
4619 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4620 | cancel_delayed_work(&bond->arp_work); | |
4621 | ||
4622 | if (bond->params.mode == BOND_MODE_ALB && | |
4623 | delayed_work_pending(&bond->alb_work)) | |
4624 | cancel_delayed_work(&bond->alb_work); | |
4625 | ||
4626 | if (bond->params.mode == BOND_MODE_8023AD && | |
4627 | delayed_work_pending(&bond->ad_work)) | |
4628 | cancel_delayed_work(&bond->ad_work); | |
4629 | } | |
4630 | ||
a434e43f JV |
4631 | /* De-initialize device specific data. |
4632 | * Caller must hold rtnl_lock. | |
4633 | */ | |
4634 | static void bond_deinit(struct net_device *bond_dev) | |
4635 | { | |
454d7c9b | 4636 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f JV |
4637 | |
4638 | list_del(&bond->bond_list); | |
4639 | ||
4640 | bond_work_cancel_all(bond); | |
4641 | ||
a434e43f | 4642 | bond_remove_proc_entry(bond); |
a434e43f JV |
4643 | } |
4644 | ||
1da177e4 LT |
4645 | /* Unregister and free all bond devices. |
4646 | * Caller must hold rtnl_lock. | |
4647 | */ | |
4648 | static void bond_free_all(void) | |
4649 | { | |
4650 | struct bonding *bond, *nxt; | |
4651 | ||
4652 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4653 | struct net_device *bond_dev = bond->dev; | |
4654 | ||
fdaea7a9 | 4655 | bond_work_cancel_all(bond); |
70298705 | 4656 | /* Release the bonded slaves */ |
4657 | bond_release_all(bond_dev); | |
9e71626c | 4658 | unregister_netdevice(bond_dev); |
1da177e4 LT |
4659 | } |
4660 | ||
1da177e4 | 4661 | bond_destroy_proc_dir(); |
1da177e4 LT |
4662 | } |
4663 | ||
4664 | /*------------------------- Module initialization ---------------------------*/ | |
4665 | ||
4666 | /* | |
4667 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4668 | * number of the mode or its string name. A bit complicated because |
4669 | * some mode names are substrings of other names, and calls from sysfs | |
4670 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4671 | */ |
325dcf7a | 4672 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4673 | { |
54b87323 | 4674 | int modeint = -1, i, rv; |
a42e534f | 4675 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4676 | |
a42e534f JV |
4677 | for (p = (char *)buf; *p; p++) |
4678 | if (!(isdigit(*p) || isspace(*p))) | |
4679 | break; | |
4680 | ||
4681 | if (*p) | |
ece95f7f | 4682 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4683 | else |
54b87323 | 4684 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4685 | |
4686 | if (!rv) | |
4687 | return -1; | |
1da177e4 LT |
4688 | |
4689 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4690 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4691 | return tbl[i].mode; |
4692 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4693 | return tbl[i].mode; |
1da177e4 LT |
4694 | } |
4695 | ||
4696 | return -1; | |
4697 | } | |
4698 | ||
4699 | static int bond_check_params(struct bond_params *params) | |
4700 | { | |
3915c1e8 | 4701 | int arp_validate_value, fail_over_mac_value; |
f5b2b966 | 4702 | |
1da177e4 LT |
4703 | /* |
4704 | * Convert string parameters. | |
4705 | */ | |
4706 | if (mode) { | |
4707 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4708 | if (bond_mode == -1) { | |
3d632c3f | 4709 | pr_err(DRV_NAME |
1da177e4 LT |
4710 | ": Error: Invalid bonding mode \"%s\"\n", |
4711 | mode == NULL ? "NULL" : mode); | |
4712 | return -EINVAL; | |
4713 | } | |
4714 | } | |
4715 | ||
169a3e66 JV |
4716 | if (xmit_hash_policy) { |
4717 | if ((bond_mode != BOND_MODE_XOR) && | |
4718 | (bond_mode != BOND_MODE_8023AD)) { | |
3d632c3f | 4719 | pr_info(DRV_NAME |
169a3e66 JV |
4720 | ": xor_mode param is irrelevant in mode %s\n", |
4721 | bond_mode_name(bond_mode)); | |
4722 | } else { | |
4723 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4724 | xmit_hashtype_tbl); | |
4725 | if (xmit_hashtype == -1) { | |
3d632c3f SH |
4726 | pr_err(DRV_NAME |
4727 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4728 | xmit_hash_policy == NULL ? "NULL" : | |
169a3e66 JV |
4729 | xmit_hash_policy); |
4730 | return -EINVAL; | |
4731 | } | |
4732 | } | |
4733 | } | |
4734 | ||
1da177e4 LT |
4735 | if (lacp_rate) { |
4736 | if (bond_mode != BOND_MODE_8023AD) { | |
3d632c3f | 4737 | pr_info(DRV_NAME |
1da177e4 LT |
4738 | ": lacp_rate param is irrelevant in mode %s\n", |
4739 | bond_mode_name(bond_mode)); | |
4740 | } else { | |
4741 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4742 | if (lacp_fast == -1) { | |
3d632c3f | 4743 | pr_err(DRV_NAME |
1da177e4 LT |
4744 | ": Error: Invalid lacp rate \"%s\"\n", |
4745 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4746 | return -EINVAL; | |
4747 | } | |
4748 | } | |
4749 | } | |
4750 | ||
fd989c83 JV |
4751 | if (ad_select) { |
4752 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4753 | if (params->ad_select == -1) { | |
3d632c3f | 4754 | pr_err(DRV_NAME |
fd989c83 JV |
4755 | ": Error: Invalid ad_select \"%s\"\n", |
4756 | ad_select == NULL ? "NULL" : ad_select); | |
4757 | return -EINVAL; | |
4758 | } | |
4759 | ||
4760 | if (bond_mode != BOND_MODE_8023AD) { | |
3d632c3f | 4761 | pr_warning(DRV_NAME |
fd989c83 JV |
4762 | ": ad_select param only affects 802.3ad mode\n"); |
4763 | } | |
4764 | } else { | |
4765 | params->ad_select = BOND_AD_STABLE; | |
4766 | } | |
4767 | ||
f5841306 | 4768 | if (max_bonds < 0) { |
3d632c3f | 4769 | pr_warning(DRV_NAME |
1da177e4 | 4770 | ": Warning: max_bonds (%d) not in range %d-%d, so it " |
4e0952c7 | 4771 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
b8a9787e | 4772 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
1da177e4 LT |
4773 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4774 | } | |
4775 | ||
4776 | if (miimon < 0) { | |
3d632c3f | 4777 | pr_warning(DRV_NAME |
1da177e4 LT |
4778 | ": Warning: miimon module parameter (%d), " |
4779 | "not in range 0-%d, so it was reset to %d\n", | |
4780 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4781 | miimon = BOND_LINK_MON_INTERV; | |
4782 | } | |
4783 | ||
4784 | if (updelay < 0) { | |
3d632c3f | 4785 | pr_warning(DRV_NAME |
1da177e4 LT |
4786 | ": Warning: updelay module parameter (%d), " |
4787 | "not in range 0-%d, so it was reset to 0\n", | |
4788 | updelay, INT_MAX); | |
4789 | updelay = 0; | |
4790 | } | |
4791 | ||
4792 | if (downdelay < 0) { | |
3d632c3f | 4793 | pr_warning(DRV_NAME |
1da177e4 LT |
4794 | ": Warning: downdelay module parameter (%d), " |
4795 | "not in range 0-%d, so it was reset to 0\n", | |
4796 | downdelay, INT_MAX); | |
4797 | downdelay = 0; | |
4798 | } | |
4799 | ||
4800 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
3d632c3f | 4801 | pr_warning(DRV_NAME |
1da177e4 LT |
4802 | ": Warning: use_carrier module parameter (%d), " |
4803 | "not of valid value (0/1), so it was set to 1\n", | |
4804 | use_carrier); | |
4805 | use_carrier = 1; | |
4806 | } | |
4807 | ||
7893b249 | 4808 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
3d632c3f | 4809 | pr_warning(DRV_NAME |
7893b249 MS |
4810 | ": Warning: num_grat_arp (%d) not in range 0-255 so it " |
4811 | "was reset to 1 \n", num_grat_arp); | |
4812 | num_grat_arp = 1; | |
4813 | } | |
4814 | ||
305d552a | 4815 | if (num_unsol_na < 0 || num_unsol_na > 255) { |
3d632c3f | 4816 | pr_warning(DRV_NAME |
305d552a BH |
4817 | ": Warning: num_unsol_na (%d) not in range 0-255 so it " |
4818 | "was reset to 1 \n", num_unsol_na); | |
4819 | num_unsol_na = 1; | |
4820 | } | |
4821 | ||
1da177e4 LT |
4822 | /* reset values for 802.3ad */ |
4823 | if (bond_mode == BOND_MODE_8023AD) { | |
4824 | if (!miimon) { | |
3d632c3f | 4825 | pr_warning(DRV_NAME |
1da177e4 LT |
4826 | ": Warning: miimon must be specified, " |
4827 | "otherwise bonding will not detect link " | |
4828 | "failure, speed and duplex which are " | |
4829 | "essential for 802.3ad operation\n"); | |
3d632c3f | 4830 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4831 | miimon = 100; |
4832 | } | |
4833 | } | |
4834 | ||
4835 | /* reset values for TLB/ALB */ | |
4836 | if ((bond_mode == BOND_MODE_TLB) || | |
4837 | (bond_mode == BOND_MODE_ALB)) { | |
4838 | if (!miimon) { | |
3d632c3f | 4839 | pr_warning(DRV_NAME |
1da177e4 LT |
4840 | ": Warning: miimon must be specified, " |
4841 | "otherwise bonding will not detect link " | |
4842 | "failure and link speed which are essential " | |
4843 | "for TLB/ALB load balancing\n"); | |
3d632c3f | 4844 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4845 | miimon = 100; |
4846 | } | |
4847 | } | |
4848 | ||
4849 | if (bond_mode == BOND_MODE_ALB) { | |
e5e2a8fd | 4850 | pr_notice(DRV_NAME |
1da177e4 LT |
4851 | ": In ALB mode you might experience client " |
4852 | "disconnections upon reconnection of a link if the " | |
4853 | "bonding module updelay parameter (%d msec) is " | |
4854 | "incompatible with the forwarding delay time of the " | |
4855 | "switch\n", | |
4856 | updelay); | |
4857 | } | |
4858 | ||
4859 | if (!miimon) { | |
4860 | if (updelay || downdelay) { | |
4861 | /* just warn the user the up/down delay will have | |
4862 | * no effect since miimon is zero... | |
4863 | */ | |
3d632c3f | 4864 | pr_warning(DRV_NAME |
1da177e4 LT |
4865 | ": Warning: miimon module parameter not set " |
4866 | "and updelay (%d) or downdelay (%d) module " | |
4867 | "parameter is set; updelay and downdelay have " | |
4868 | "no effect unless miimon is set\n", | |
4869 | updelay, downdelay); | |
4870 | } | |
4871 | } else { | |
4872 | /* don't allow arp monitoring */ | |
4873 | if (arp_interval) { | |
3d632c3f | 4874 | pr_warning(DRV_NAME |
1da177e4 LT |
4875 | ": Warning: miimon (%d) and arp_interval (%d) " |
4876 | "can't be used simultaneously, disabling ARP " | |
4877 | "monitoring\n", | |
4878 | miimon, arp_interval); | |
4879 | arp_interval = 0; | |
4880 | } | |
4881 | ||
4882 | if ((updelay % miimon) != 0) { | |
3d632c3f | 4883 | pr_warning(DRV_NAME |
1da177e4 LT |
4884 | ": Warning: updelay (%d) is not a multiple " |
4885 | "of miimon (%d), updelay rounded to %d ms\n", | |
4886 | updelay, miimon, (updelay / miimon) * miimon); | |
4887 | } | |
4888 | ||
4889 | updelay /= miimon; | |
4890 | ||
4891 | if ((downdelay % miimon) != 0) { | |
3d632c3f | 4892 | pr_warning(DRV_NAME |
1da177e4 LT |
4893 | ": Warning: downdelay (%d) is not a multiple " |
4894 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4895 | downdelay, miimon, | |
4896 | (downdelay / miimon) * miimon); | |
4897 | } | |
4898 | ||
4899 | downdelay /= miimon; | |
4900 | } | |
4901 | ||
4902 | if (arp_interval < 0) { | |
3d632c3f | 4903 | pr_warning(DRV_NAME |
1da177e4 LT |
4904 | ": Warning: arp_interval module parameter (%d) " |
4905 | ", not in range 0-%d, so it was reset to %d\n", | |
4906 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4907 | arp_interval = BOND_LINK_ARP_INTERV; | |
4908 | } | |
4909 | ||
4910 | for (arp_ip_count = 0; | |
4911 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4912 | arp_ip_count++) { | |
4913 | /* not complete check, but should be good enough to | |
4914 | catch mistakes */ | |
4915 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
3d632c3f | 4916 | pr_warning(DRV_NAME |
1da177e4 LT |
4917 | ": Warning: bad arp_ip_target module parameter " |
4918 | "(%s), ARP monitoring will not be performed\n", | |
4919 | arp_ip_target[arp_ip_count]); | |
4920 | arp_interval = 0; | |
4921 | } else { | |
d3bb52b0 | 4922 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4923 | arp_target[arp_ip_count] = ip; |
4924 | } | |
4925 | } | |
4926 | ||
4927 | if (arp_interval && !arp_ip_count) { | |
4928 | /* don't allow arping if no arp_ip_target given... */ | |
3d632c3f | 4929 | pr_warning(DRV_NAME |
1da177e4 LT |
4930 | ": Warning: arp_interval module parameter (%d) " |
4931 | "specified without providing an arp_ip_target " | |
4932 | "parameter, arp_interval was reset to 0\n", | |
4933 | arp_interval); | |
4934 | arp_interval = 0; | |
4935 | } | |
4936 | ||
f5b2b966 JV |
4937 | if (arp_validate) { |
4938 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f SH |
4939 | pr_err(DRV_NAME |
4940 | ": arp_validate only supported in active-backup mode\n"); | |
f5b2b966 JV |
4941 | return -EINVAL; |
4942 | } | |
4943 | if (!arp_interval) { | |
3d632c3f | 4944 | pr_err(DRV_NAME |
f5b2b966 JV |
4945 | ": arp_validate requires arp_interval\n"); |
4946 | return -EINVAL; | |
4947 | } | |
4948 | ||
4949 | arp_validate_value = bond_parse_parm(arp_validate, | |
4950 | arp_validate_tbl); | |
4951 | if (arp_validate_value == -1) { | |
3d632c3f | 4952 | pr_err(DRV_NAME |
f5b2b966 JV |
4953 | ": Error: invalid arp_validate \"%s\"\n", |
4954 | arp_validate == NULL ? "NULL" : arp_validate); | |
4955 | return -EINVAL; | |
4956 | } | |
4957 | } else | |
4958 | arp_validate_value = 0; | |
4959 | ||
1da177e4 | 4960 | if (miimon) { |
3d632c3f | 4961 | pr_info(DRV_NAME |
1da177e4 LT |
4962 | ": MII link monitoring set to %d ms\n", |
4963 | miimon); | |
4964 | } else if (arp_interval) { | |
4965 | int i; | |
4966 | ||
3d632c3f SH |
4967 | pr_info(DRV_NAME ": ARP monitoring set to %d ms," |
4968 | " validate %s, with %d target(s):", | |
f5b2b966 JV |
4969 | arp_interval, |
4970 | arp_validate_tbl[arp_validate_value].modename, | |
4971 | arp_ip_count); | |
1da177e4 LT |
4972 | |
4973 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4974 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4975 | |
e5e2a8fd | 4976 | pr_info("\n"); |
1da177e4 | 4977 | |
b8a9787e | 4978 | } else if (max_bonds) { |
1da177e4 LT |
4979 | /* miimon and arp_interval not set, we need one so things |
4980 | * work as expected, see bonding.txt for details | |
4981 | */ | |
3d632c3f | 4982 | pr_warning(DRV_NAME |
1da177e4 LT |
4983 | ": Warning: either miimon or arp_interval and " |
4984 | "arp_ip_target module parameters must be specified, " | |
4985 | "otherwise bonding will not detect link failures! see " | |
4986 | "bonding.txt for details.\n"); | |
4987 | } | |
4988 | ||
4989 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4990 | /* currently, using a primary only makes sense | |
4991 | * in active backup, TLB or ALB modes | |
4992 | */ | |
3d632c3f | 4993 | pr_warning(DRV_NAME |
1da177e4 LT |
4994 | ": Warning: %s primary device specified but has no " |
4995 | "effect in %s mode\n", | |
4996 | primary, bond_mode_name(bond_mode)); | |
4997 | primary = NULL; | |
4998 | } | |
4999 | ||
3915c1e8 JV |
5000 | if (fail_over_mac) { |
5001 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
5002 | fail_over_mac_tbl); | |
5003 | if (fail_over_mac_value == -1) { | |
3d632c3f | 5004 | pr_err(DRV_NAME |
3915c1e8 JV |
5005 | ": Error: invalid fail_over_mac \"%s\"\n", |
5006 | arp_validate == NULL ? "NULL" : arp_validate); | |
5007 | return -EINVAL; | |
5008 | } | |
5009 | ||
5010 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
3d632c3f | 5011 | pr_warning(DRV_NAME |
3915c1e8 JV |
5012 | ": Warning: fail_over_mac only affects " |
5013 | "active-backup mode.\n"); | |
5014 | } else { | |
5015 | fail_over_mac_value = BOND_FOM_NONE; | |
5016 | } | |
dd957c57 | 5017 | |
1da177e4 LT |
5018 | /* fill params struct with the proper values */ |
5019 | params->mode = bond_mode; | |
169a3e66 | 5020 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 5021 | params->miimon = miimon; |
7893b249 | 5022 | params->num_grat_arp = num_grat_arp; |
305d552a | 5023 | params->num_unsol_na = num_unsol_na; |
1da177e4 | 5024 | params->arp_interval = arp_interval; |
f5b2b966 | 5025 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
5026 | params->updelay = updelay; |
5027 | params->downdelay = downdelay; | |
5028 | params->use_carrier = use_carrier; | |
5029 | params->lacp_fast = lacp_fast; | |
5030 | params->primary[0] = 0; | |
3915c1e8 | 5031 | params->fail_over_mac = fail_over_mac_value; |
1da177e4 LT |
5032 | |
5033 | if (primary) { | |
5034 | strncpy(params->primary, primary, IFNAMSIZ); | |
5035 | params->primary[IFNAMSIZ - 1] = 0; | |
5036 | } | |
5037 | ||
5038 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
5039 | ||
5040 | return 0; | |
5041 | } | |
5042 | ||
0daa2303 | 5043 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 5044 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 5045 | |
e8a0464c DM |
5046 | static void bond_set_lockdep_class_one(struct net_device *dev, |
5047 | struct netdev_queue *txq, | |
5048 | void *_unused) | |
c773e847 DM |
5049 | { |
5050 | lockdep_set_class(&txq->_xmit_lock, | |
5051 | &bonding_netdev_xmit_lock_key); | |
5052 | } | |
5053 | ||
5054 | static void bond_set_lockdep_class(struct net_device *dev) | |
5055 | { | |
cf508b12 DM |
5056 | lockdep_set_class(&dev->addr_list_lock, |
5057 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 5058 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
5059 | } |
5060 | ||
181470fc SH |
5061 | /* |
5062 | * Called from registration process | |
5063 | */ | |
5064 | static int bond_init(struct net_device *bond_dev) | |
5065 | { | |
5066 | struct bonding *bond = netdev_priv(bond_dev); | |
5067 | ||
5068 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
5069 | ||
5070 | bond->wq = create_singlethread_workqueue(bond_dev->name); | |
5071 | if (!bond->wq) | |
5072 | return -ENOMEM; | |
5073 | ||
5074 | bond_set_lockdep_class(bond_dev); | |
5075 | ||
5076 | netif_carrier_off(bond_dev); | |
5077 | ||
5078 | bond_create_proc_entry(bond); | |
5079 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
5080 | ||
5081 | return 0; | |
5082 | } | |
5083 | ||
dfe60397 | 5084 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 5085 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
5086 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
5087 | * set up our sysfs entries. | |
5088 | */ | |
d2991f75 | 5089 | int bond_create(const char *name) |
dfe60397 MW |
5090 | { |
5091 | struct net_device *bond_dev; | |
5092 | int res; | |
5093 | ||
5094 | rtnl_lock(); | |
027ea041 | 5095 | /* Check to see if the bond already exists. */ |
373500db SH |
5096 | /* FIXME: pass netns from caller */ |
5097 | if (name && __dev_get_by_name(&init_net, name)) { | |
5098 | pr_err(DRV_NAME ": cannot add bond %s; already exists\n", | |
5099 | name); | |
5100 | res = -EEXIST; | |
5101 | goto out_rtnl; | |
4fe4763c | 5102 | } |
027ea041 | 5103 | |
e4b91c48 | 5104 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
181470fc | 5105 | bond_setup); |
dfe60397 | 5106 | if (!bond_dev) { |
3d632c3f | 5107 | pr_err(DRV_NAME ": %s: eek! can't alloc netdev!\n", |
dfe60397 MW |
5108 | name); |
5109 | res = -ENOMEM; | |
5110 | goto out_rtnl; | |
5111 | } | |
5112 | ||
e4b91c48 JV |
5113 | if (!name) { |
5114 | res = dev_alloc_name(bond_dev, "bond%d"); | |
5115 | if (res < 0) | |
5116 | goto out_netdev; | |
5117 | } | |
5118 | ||
dfe60397 | 5119 | res = register_netdevice(bond_dev); |
3d632c3f | 5120 | if (res < 0) |
dfe60397 | 5121 | goto out_bond; |
0daa2303 | 5122 | |
454d7c9b | 5123 | res = bond_create_sysfs_entry(netdev_priv(bond_dev)); |
1363d9b1 JP |
5124 | if (res < 0) |
5125 | goto out_unreg; | |
09c89279 | 5126 | |
7e083840 | 5127 | rtnl_unlock(); |
09c89279 JV |
5128 | return 0; |
5129 | ||
1363d9b1 | 5130 | out_unreg: |
1363d9b1 | 5131 | unregister_netdevice(bond_dev); |
dfe60397 MW |
5132 | out_bond: |
5133 | bond_deinit(bond_dev); | |
5134 | out_netdev: | |
5135 | free_netdev(bond_dev); | |
5136 | out_rtnl: | |
5137 | rtnl_unlock(); | |
dfe60397 MW |
5138 | return res; |
5139 | } | |
5140 | ||
1da177e4 LT |
5141 | static int __init bonding_init(void) |
5142 | { | |
1da177e4 LT |
5143 | int i; |
5144 | int res; | |
5145 | ||
3d632c3f | 5146 | pr_info("%s", version); |
1da177e4 | 5147 | |
dfe60397 | 5148 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 5149 | if (res) |
dfe60397 | 5150 | goto out; |
1da177e4 | 5151 | |
1da177e4 | 5152 | bond_create_proc_dir(); |
027ea041 | 5153 | |
1da177e4 | 5154 | for (i = 0; i < max_bonds; i++) { |
d2991f75 | 5155 | res = bond_create(NULL); |
dfe60397 MW |
5156 | if (res) |
5157 | goto err; | |
1da177e4 LT |
5158 | } |
5159 | ||
b76cdba9 MW |
5160 | res = bond_create_sysfs(); |
5161 | if (res) | |
5162 | goto err; | |
5163 | ||
1da177e4 | 5164 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5165 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5166 | bond_register_ipv6_notifier(); |
1da177e4 | 5167 | |
dfe60397 MW |
5168 | goto out; |
5169 | err: | |
40abc270 | 5170 | rtnl_lock(); |
1da177e4 | 5171 | bond_free_all(); |
1da177e4 | 5172 | rtnl_unlock(); |
dfe60397 | 5173 | out: |
1da177e4 | 5174 | return res; |
dfe60397 | 5175 | |
1da177e4 LT |
5176 | } |
5177 | ||
5178 | static void __exit bonding_exit(void) | |
5179 | { | |
5180 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5181 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5182 | bond_unregister_ipv6_notifier(); |
1da177e4 | 5183 | |
ae68c398 PE |
5184 | bond_destroy_sysfs(); |
5185 | ||
1da177e4 LT |
5186 | rtnl_lock(); |
5187 | bond_free_all(); | |
5188 | rtnl_unlock(); | |
5189 | } | |
5190 | ||
5191 | module_init(bonding_init); | |
5192 | module_exit(bonding_exit); | |
5193 | MODULE_LICENSE("GPL"); | |
5194 | MODULE_VERSION(DRV_VERSION); | |
5195 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5196 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); |