Commit | Line | Data |
---|---|---|
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 | * | |
32 | * v0.1 - first working version. | |
33 | * v0.2 - changed stats to be calculated by summing slaves stats. | |
34 | * | |
35 | * Changes: | |
36 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
37 | * - fix leaks on failure at bond_init | |
38 | * | |
39 | * 2000/09/30 - Willy Tarreau <willy at meta-x.org> | |
40 | * - added trivial code to release a slave device. | |
41 | * - fixed security bug (CAP_NET_ADMIN not checked) | |
42 | * - implemented MII link monitoring to disable dead links : | |
43 | * All MII capable slaves are checked every <miimon> milliseconds | |
44 | * (100 ms seems good). This value can be changed by passing it to | |
45 | * insmod. A value of zero disables the monitoring (default). | |
46 | * - fixed an infinite loop in bond_xmit_roundrobin() when there's no | |
47 | * good slave. | |
48 | * - made the code hopefully SMP safe | |
49 | * | |
50 | * 2000/10/03 - Willy Tarreau <willy at meta-x.org> | |
51 | * - optimized slave lists based on relevant suggestions from Thomas Davis | |
52 | * - implemented active-backup method to obtain HA with two switches: | |
53 | * stay as long as possible on the same active interface, while we | |
54 | * also monitor the backup one (MII link status) because we want to know | |
55 | * if we are able to switch at any time. ( pass "mode=1" to insmod ) | |
56 | * - lots of stress testings because we need it to be more robust than the | |
57 | * wires ! :-> | |
58 | * | |
59 | * 2000/10/09 - Willy Tarreau <willy at meta-x.org> | |
60 | * - added up and down delays after link state change. | |
61 | * - optimized the slaves chaining so that when we run forward, we never | |
62 | * repass through the bond itself, but we can find it by searching | |
63 | * backwards. Renders the deletion more difficult, but accelerates the | |
64 | * scan. | |
65 | * - smarter enslaving and releasing. | |
66 | * - finer and more robust SMP locking | |
67 | * | |
68 | * 2000/10/17 - Willy Tarreau <willy at meta-x.org> | |
69 | * - fixed two potential SMP race conditions | |
70 | * | |
71 | * 2000/10/18 - Willy Tarreau <willy at meta-x.org> | |
72 | * - small fixes to the monitoring FSM in case of zero delays | |
73 | * 2000/11/01 - Willy Tarreau <willy at meta-x.org> | |
74 | * - fixed first slave not automatically used in trunk mode. | |
75 | * 2000/11/10 : spelling of "EtherChannel" corrected. | |
76 | * 2000/11/13 : fixed a race condition in case of concurrent accesses to ioctl(). | |
77 | * 2000/12/16 : fixed improper usage of rtnl_exlock_nowait(). | |
78 | * | |
79 | * 2001/1/3 - Chad N. Tindel <ctindel at ieee dot org> | |
80 | * - The bonding driver now simulates MII status monitoring, just like | |
81 | * a normal network device. It will show that the link is down iff | |
82 | * every slave in the bond shows that their links are down. If at least | |
83 | * one slave is up, the bond's MII status will appear as up. | |
84 | * | |
85 | * 2001/2/7 - Chad N. Tindel <ctindel at ieee dot org> | |
86 | * - Applications can now query the bond from user space to get | |
87 | * information which may be useful. They do this by calling | |
88 | * the BOND_INFO_QUERY ioctl. Once the app knows how many slaves | |
89 | * are in the bond, it can call the BOND_SLAVE_INFO_QUERY ioctl to | |
90 | * get slave specific information (# link failures, etc). See | |
91 | * <linux/if_bonding.h> for more details. The structs of interest | |
92 | * are ifbond and ifslave. | |
93 | * | |
94 | * 2001/4/5 - Chad N. Tindel <ctindel at ieee dot org> | |
95 | * - Ported to 2.4 Kernel | |
96 | * | |
97 | * 2001/5/2 - Jeffrey E. Mast <jeff at mastfamily dot com> | |
98 | * - When a device is detached from a bond, the slave device is no longer | |
99 | * left thinking that is has a master. | |
100 | * | |
101 | * 2001/5/16 - Jeffrey E. Mast <jeff at mastfamily dot com> | |
102 | * - memset did not appropriately initialized the bond rw_locks. Used | |
103 | * rwlock_init to initialize to unlocked state to prevent deadlock when | |
104 | * first attempting a lock | |
105 | * - Called SET_MODULE_OWNER for bond device | |
106 | * | |
107 | * 2001/5/17 - Tim Anderson <tsa at mvista.com> | |
108 | * - 2 paths for releasing for slave release; 1 through ioctl | |
109 | * and 2) through close. Both paths need to release the same way. | |
110 | * - the free slave in bond release is changing slave status before | |
111 | * the free. The netdev_set_master() is intended to change slave state | |
112 | * so it should not be done as part of the release process. | |
113 | * - Simple rule for slave state at release: only the active in A/B and | |
114 | * only one in the trunked case. | |
115 | * | |
116 | * 2001/6/01 - Tim Anderson <tsa at mvista.com> | |
117 | * - Now call dev_close when releasing a slave so it doesn't screw up | |
118 | * out routing table. | |
119 | * | |
120 | * 2001/6/01 - Chad N. Tindel <ctindel at ieee dot org> | |
121 | * - Added /proc support for getting bond and slave information. | |
122 | * Information is in /proc/net/<bond device>/info. | |
123 | * - Changed the locking when calling bond_close to prevent deadlock. | |
124 | * | |
125 | * 2001/8/05 - Janice Girouard <girouard at us.ibm.com> | |
126 | * - correct problem where refcnt of slave is not incremented in bond_ioctl | |
127 | * so the system hangs when halting. | |
128 | * - correct locking problem when unable to malloc in bond_enslave. | |
129 | * - adding bond_xmit_xor logic. | |
130 | * - adding multiple bond device support. | |
131 | * | |
132 | * 2001/8/13 - Erik Habbinga <erik_habbinga at hp dot com> | |
133 | * - correct locking problem with rtnl_exlock_nowait | |
134 | * | |
135 | * 2001/8/23 - Janice Girouard <girouard at us.ibm.com> | |
136 | * - bzero initial dev_bonds, to correct oops | |
137 | * - convert SIOCDEVPRIVATE to new MII ioctl calls | |
138 | * | |
139 | * 2001/9/13 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> | |
140 | * - Add the BOND_CHANGE_ACTIVE ioctl implementation | |
141 | * | |
142 | * 2001/9/14 - Mark Huth <mhuth at mvista dot com> | |
143 | * - Change MII_LINK_READY to not check for end of auto-negotiation, | |
144 | * but only for an up link. | |
145 | * | |
146 | * 2001/9/20 - Chad N. Tindel <ctindel at ieee dot org> | |
147 | * - Add the device field to bonding_t. Previously the net_device | |
148 | * corresponding to a bond wasn't available from the bonding_t | |
149 | * structure. | |
150 | * | |
151 | * 2001/9/25 - Janice Girouard <girouard at us.ibm.com> | |
152 | * - add arp_monitor for active backup mode | |
153 | * | |
154 | * 2001/10/23 - Takao Indoh <indou dot takao at jp dot fujitsu dot com> | |
155 | * - Various memory leak fixes | |
156 | * | |
157 | * 2001/11/5 - Mark Huth <mark dot huth at mvista dot com> | |
158 | * - Don't take rtnl lock in bond_mii_monitor as it deadlocks under | |
159 | * certain hotswap conditions. | |
160 | * Note: this same change may be required in bond_arp_monitor ??? | |
161 | * - Remove possibility of calling bond_sethwaddr with NULL slave_dev ptr | |
162 | * - Handle hot swap ethernet interface deregistration events to remove | |
163 | * kernel oops following hot swap of enslaved interface | |
164 | * | |
165 | * 2002/1/2 - Chad N. Tindel <ctindel at ieee dot org> | |
166 | * - Restore original slave flags at release time. | |
167 | * | |
168 | * 2002/02/18 - Erik Habbinga <erik_habbinga at hp dot com> | |
169 | * - bond_release(): calling kfree on our_slave after call to | |
170 | * bond_restore_slave_flags, not before | |
171 | * - bond_enslave(): saving slave flags into original_flags before | |
172 | * call to netdev_set_master, so the IFF_SLAVE flag doesn't end | |
173 | * up in original_flags | |
174 | * | |
175 | * 2002/04/05 - Mark Smith <mark.smith at comdev dot cc> and | |
176 | * Steve Mead <steve.mead at comdev dot cc> | |
177 | * - Port Gleb Natapov's multicast support patchs from 2.4.12 | |
178 | * to 2.4.18 adding support for multicast. | |
179 | * | |
180 | * 2002/06/10 - Tony Cureington <tony.cureington * hp_com> | |
181 | * - corrected uninitialized pointer (ifr.ifr_data) in bond_check_dev_link; | |
182 | * actually changed function to use MIIPHY, then MIIREG, and finally | |
183 | * ETHTOOL to determine the link status | |
184 | * - fixed bad ifr_data pointer assignments in bond_ioctl | |
185 | * - corrected mode 1 being reported as active-backup in bond_get_info; | |
186 | * also added text to distinguish type of load balancing (rr or xor) | |
187 | * - change arp_ip_target module param from "1-12s" (array of 12 ptrs) | |
188 | * to "s" (a single ptr) | |
189 | * | |
190 | * 2002/08/30 - Jay Vosburgh <fubar at us dot ibm dot com> | |
191 | * - Removed acquisition of xmit_lock in set_multicast_list; caused | |
192 | * deadlock on SMP (lock is held by caller). | |
193 | * - Revamped SIOCGMIIPHY, SIOCGMIIREG portion of bond_check_dev_link(). | |
194 | * | |
195 | * 2002/09/18 - Jay Vosburgh <fubar at us dot ibm dot com> | |
196 | * - Fixed up bond_check_dev_link() (and callers): removed some magic | |
197 | * numbers, banished local MII_ defines, wrapped ioctl calls to | |
198 | * prevent EFAULT errors | |
199 | * | |
200 | * 2002/9/30 - Jay Vosburgh <fubar at us dot ibm dot com> | |
201 | * - make sure the ip target matches the arp_target before saving the | |
202 | * hw address. | |
203 | * | |
204 | * 2002/9/30 - Dan Eisner <eisner at 2robots dot com> | |
205 | * - make sure my_ip is set before taking down the link, since | |
206 | * not all switches respond if the source ip is not set. | |
207 | * | |
208 | * 2002/10/8 - Janice Girouard <girouard at us dot ibm dot com> | |
209 | * - read in the local ip address when enslaving a device | |
210 | * - add primary support | |
211 | * - make sure 2*arp_interval has passed when a new device | |
212 | * is brought on-line before taking it down. | |
213 | * | |
214 | * 2002/09/11 - Philippe De Muyter <phdm at macqel dot be> | |
215 | * - Added bond_xmit_broadcast logic. | |
216 | * - Added bond_mode() support function. | |
217 | * | |
218 | * 2002/10/26 - Laurent Deniel <laurent.deniel at free.fr> | |
219 | * - allow to register multicast addresses only on active slave | |
220 | * (useful in active-backup mode) | |
221 | * - add multicast module parameter | |
222 | * - fix deletion of multicast groups after unloading module | |
223 | * | |
224 | * 2002/11/06 - Kameshwara Rayaprolu <kameshwara.rao * wipro_com> | |
225 | * - Changes to prevent panic from closing the device twice; if we close | |
226 | * the device in bond_release, we must set the original_flags to down | |
227 | * so it won't be closed again by the network layer. | |
228 | * | |
229 | * 2002/11/07 - Tony Cureington <tony.cureington * hp_com> | |
230 | * - Fix arp_target_hw_addr memory leak | |
231 | * - Created activebackup_arp_monitor function to handle arp monitoring | |
232 | * in active backup mode - the bond_arp_monitor had several problems... | |
233 | * such as allowing slaves to tx arps sequentially without any delay | |
234 | * for a response | |
235 | * - Renamed bond_arp_monitor to loadbalance_arp_monitor and re-wrote | |
236 | * this function to just handle arp monitoring in load-balancing mode; | |
237 | * it is a lot more compact now | |
238 | * - Changes to ensure one and only one slave transmits in active-backup | |
239 | * mode | |
240 | * - Robustesize parameters; warn users about bad combinations of | |
241 | * parameters; also if miimon is specified and a network driver does | |
242 | * not support MII or ETHTOOL, inform the user of this | |
243 | * - Changes to support link_failure_count when in arp monitoring mode | |
244 | * - Fix up/down delay reported in /proc | |
245 | * - Added version; log version; make version available from "modinfo -d" | |
246 | * - Fixed problem in bond_check_dev_link - if the first IOCTL (SIOCGMIIPH) | |
247 | * failed, the ETHTOOL ioctl never got a chance | |
248 | * | |
249 | * 2002/11/16 - Laurent Deniel <laurent.deniel at free.fr> | |
250 | * - fix multicast handling in activebackup_arp_monitor | |
251 | * - remove one unnecessary and confusing curr_active_slave == slave test | |
252 | * in activebackup_arp_monitor | |
253 | * | |
254 | * 2002/11/17 - Laurent Deniel <laurent.deniel at free.fr> | |
255 | * - fix bond_slave_info_query when slave_id = num_slaves | |
256 | * | |
257 | * 2002/11/19 - Janice Girouard <girouard at us dot ibm dot com> | |
258 | * - correct ifr_data reference. Update ifr_data reference | |
259 | * to mii_ioctl_data struct values to avoid confusion. | |
260 | * | |
261 | * 2002/11/22 - Bert Barbe <bert.barbe at oracle dot com> | |
262 | * - Add support for multiple arp_ip_target | |
263 | * | |
264 | * 2002/12/13 - Jay Vosburgh <fubar at us dot ibm dot com> | |
265 | * - Changed to allow text strings for mode and multicast, e.g., | |
266 | * insmod bonding mode=active-backup. The numbers still work. | |
267 | * One change: an invalid choice will cause module load failure, | |
268 | * rather than the previous behavior of just picking one. | |
269 | * - Minor cleanups; got rid of dup ctype stuff, atoi function | |
270 | * | |
271 | * 2003/02/07 - Jay Vosburgh <fubar at us dot ibm dot com> | |
272 | * - Added use_carrier module parameter that causes miimon to | |
273 | * use netif_carrier_ok() test instead of MII/ETHTOOL ioctls. | |
274 | * - Minor cleanups; consolidated ioctl calls to one function. | |
275 | * | |
276 | * 2003/02/07 - Tony Cureington <tony.cureington * hp_com> | |
277 | * - Fix bond_mii_monitor() logic error that could result in | |
278 | * bonding round-robin mode ignoring links after failover/recovery | |
279 | * | |
280 | * 2003/03/17 - Jay Vosburgh <fubar at us dot ibm dot com> | |
281 | * - kmalloc fix (GFP_KERNEL to GFP_ATOMIC) reported by | |
282 | * Shmulik dot Hen at intel.com. | |
283 | * - Based on discussion on mailing list, changed use of | |
284 | * update_slave_cnt(), created wrapper functions for adding/removing | |
285 | * slaves, changed bond_xmit_xor() to check slave_cnt instead of | |
286 | * checking slave and slave->dev (which only worked by accident). | |
287 | * - Misc code cleanup: get arp_send() prototype from header file, | |
288 | * add max_bonds to bonding.txt. | |
289 | * | |
290 | * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and | |
291 | * Shmulik Hen <shmulik.hen at intel dot com> | |
292 | * - Make sure only bond_attach_slave() and bond_detach_slave() can | |
293 | * manipulate the slave list, including slave_cnt, even when in | |
294 | * bond_release_all(). | |
295 | * - Fixed hang in bond_release() with traffic running: | |
296 | * netdev_set_master() must not be called from within the bond lock. | |
297 | * | |
298 | * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and | |
299 | * Shmulik Hen <shmulik.hen at intel dot com> | |
300 | * - Fixed hang in bond_enslave() with traffic running: | |
301 | * netdev_set_master() must not be called from within the bond lock. | |
302 | * | |
303 | * 2003/03/18 - Amir Noam <amir.noam at intel dot com> | |
304 | * - Added support for getting slave's speed and duplex via ethtool. | |
305 | * Needed for 802.3ad and other future modes. | |
306 | * | |
307 | * 2003/03/18 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and | |
308 | * Shmulik Hen <shmulik.hen at intel dot com> | |
309 | * - Enable support of modes that need to use the unique mac address of | |
310 | * each slave. | |
311 | * * bond_enslave(): Moved setting the slave's mac address, and | |
312 | * openning it, from the application to the driver. This breaks | |
313 | * backward comaptibility with old versions of ifenslave that open | |
314 | * the slave before enalsving it !!!. | |
315 | * * bond_release(): The driver also takes care of closing the slave | |
316 | * and restoring its original mac address. | |
317 | * - Removed the code that restores all base driver's flags. | |
318 | * Flags are automatically restored once all undo stages are done | |
319 | * properly. | |
320 | * - Block possibility of enslaving before the master is up. This | |
321 | * prevents putting the system in an unstable state. | |
322 | * | |
323 | * 2003/03/18 - Amir Noam <amir.noam at intel dot com>, | |
324 | * Tsippy Mendelson <tsippy.mendelson at intel dot com> and | |
325 | * Shmulik Hen <shmulik.hen at intel dot com> | |
326 | * - Added support for IEEE 802.3ad Dynamic link aggregation mode. | |
327 | * | |
328 | * 2003/05/01 - Amir Noam <amir.noam at intel dot com> | |
329 | * - Added ABI version control to restore compatibility between | |
330 | * new/old ifenslave and new/old bonding. | |
331 | * | |
332 | * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
333 | * - Fixed bug in bond_release_all(): save old value of curr_active_slave | |
334 | * before setting it to NULL. | |
335 | * - Changed driver versioning scheme to include version number instead | |
336 | * of release date (that is already in another field). There are 3 | |
337 | * fields X.Y.Z where: | |
338 | * X - Major version - big behavior changes | |
339 | * Y - Minor version - addition of features | |
340 | * Z - Extra version - minor changes and bug fixes | |
341 | * The current version is 1.0.0 as a base line. | |
342 | * | |
343 | * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and | |
344 | * Amir Noam <amir.noam at intel dot com> | |
345 | * - Added support for lacp_rate module param. | |
346 | * - Code beautification and style changes (mainly in comments). | |
347 | * new version - 1.0.1 | |
348 | * | |
349 | * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
350 | * - Based on discussion on mailing list, changed locking scheme | |
351 | * to use lock/unlock or lock_bh/unlock_bh appropriately instead | |
352 | * of lock_irqsave/unlock_irqrestore. The new scheme helps exposing | |
353 | * hidden bugs and solves system hangs that occurred due to the fact | |
354 | * that holding lock_irqsave doesn't prevent softirqs from running. | |
355 | * This also increases total throughput since interrupts are not | |
356 | * blocked on each transmitted packets or monitor timeout. | |
357 | * new version - 2.0.0 | |
358 | * | |
359 | * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
360 | * - Added support for Transmit load balancing mode. | |
361 | * - Concentrate all assignments of curr_active_slave to a single point | |
362 | * so specific modes can take actions when the primary adapter is | |
363 | * changed. | |
364 | * - Take the updelay parameter into consideration during bond_enslave | |
365 | * since some adapters loose their link during setting the device. | |
366 | * - Renamed bond_3ad_link_status_changed() to | |
367 | * bond_3ad_handle_link_change() for compatibility with TLB. | |
368 | * new version - 2.1.0 | |
369 | * | |
370 | * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> | |
371 | * - Added support for Adaptive load balancing mode which is | |
372 | * equivalent to Transmit load balancing + Receive load balancing. | |
373 | * new version - 2.2.0 | |
374 | * | |
375 | * 2003/05/15 - Jay Vosburgh <fubar at us dot ibm dot com> | |
376 | * - Applied fix to activebackup_arp_monitor posted to bonding-devel | |
377 | * by Tony Cureington <tony.cureington * hp_com>. Fixes ARP | |
378 | * monitor endless failover bug. Version to 2.2.10 | |
379 | * | |
380 | * 2003/05/20 - Amir Noam <amir.noam at intel dot com> | |
381 | * - Fixed bug in ABI version control - Don't commit to a specific | |
382 | * ABI version if receiving unsupported ioctl commands. | |
383 | * | |
384 | * 2003/05/22 - Jay Vosburgh <fubar at us dot ibm dot com> | |
385 | * - Fix ifenslave -c causing bond to loose existing routes; | |
386 | * added bond_set_mac_address() that doesn't require the | |
387 | * bond to be down. | |
388 | * - In conjunction with fix for ifenslave -c, in | |
389 | * bond_change_active(), changing to the already active slave | |
390 | * is no longer an error (it successfully does nothing). | |
391 | * | |
392 | * 2003/06/30 - Amir Noam <amir.noam at intel dot com> | |
393 | * - Fixed bond_change_active() for ALB/TLB modes. | |
394 | * Version to 2.2.14. | |
395 | * | |
396 | * 2003/07/29 - Amir Noam <amir.noam at intel dot com> | |
397 | * - Fixed ARP monitoring bug. | |
398 | * Version to 2.2.15. | |
399 | * | |
400 | * 2003/07/31 - Willy Tarreau <willy at ods dot org> | |
401 | * - Fixed kernel panic when using ARP monitoring without | |
402 | * setting bond's IP address. | |
403 | * Version to 2.2.16. | |
404 | * | |
405 | * 2003/08/06 - Amir Noam <amir.noam at intel dot com> | |
406 | * - Back port from 2.6: use alloc_netdev(); fix /proc handling; | |
407 | * made stats a part of bond struct so no need to allocate | |
408 | * and free it separately; use standard list operations instead | |
409 | * of pre-allocated array of bonds. | |
410 | * Version to 2.3.0. | |
411 | * | |
412 | * 2003/08/07 - Jay Vosburgh <fubar at us dot ibm dot com>, | |
413 | * Amir Noam <amir.noam at intel dot com> and | |
414 | * Shmulik Hen <shmulik.hen at intel dot com> | |
415 | * - Propagating master's settings: Distinguish between modes that | |
416 | * use a primary slave from those that don't, and propagate settings | |
417 | * accordingly; Consolidate change_active opeartions and add | |
418 | * reselect_active and find_best opeartions; Decouple promiscuous | |
419 | * handling from the multicast mode setting; Add support for changing | |
420 | * HW address and MTU with proper unwind; Consolidate procfs code, | |
421 | * add CHANGENAME handler; Enhance netdev notification handling. | |
422 | * Version to 2.4.0. | |
423 | * | |
424 | * 2003/09/15 - Stephen Hemminger <shemminger at osdl dot org>, | |
425 | * Amir Noam <amir.noam at intel dot com> | |
426 | * - Convert /proc to seq_file interface. | |
427 | * Change /proc/net/bondX/info to /proc/net/bonding/bondX. | |
428 | * Set version to 2.4.1. | |
429 | * | |
430 | * 2003/11/20 - Amir Noam <amir.noam at intel dot com> | |
431 | * - Fix /proc creation/destruction. | |
432 | * | |
433 | * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
434 | * - Massive cleanup - Set version to 2.5.0 | |
435 | * Code changes: | |
436 | * o Consolidate format of prints and debug prints. | |
437 | * o Remove bonding_t/slave_t typedefs and consolidate all casts. | |
438 | * o Remove dead code and unnecessary checks. | |
439 | * o Consolidate starting/stopping timers. | |
440 | * o Consolidate handling of primary module param throughout the code. | |
441 | * o Removed multicast module param support - all settings are done | |
442 | * according to mode. | |
443 | * o Slave list iteration - bond is no longer part of the list, | |
444 | * added cyclic list iteration macros. | |
445 | * o Consolidate error handling in all xmit functions. | |
446 | * Style changes: | |
447 | * o Consolidate function naming and declarations. | |
448 | * o Consolidate function params and local variables names. | |
449 | * o Consolidate return values. | |
450 | * o Consolidate curly braces. | |
451 | * o Consolidate conditionals format. | |
452 | * o Change struct member names and types. | |
453 | * o Chomp trailing spaces, remove empty lines, fix indentations. | |
454 | * o Re-organize code according to context. | |
455 | * | |
456 | * 2003/12/30 - Amir Noam <amir.noam at intel dot com> | |
457 | * - Fixed: Cannot remove and re-enslave the original active slave. | |
458 | * - Fixed: Releasing the original active slave causes mac address | |
459 | * duplication. | |
460 | * - Add support for slaves that use ethtool_ops. | |
461 | * Set version to 2.5.3. | |
462 | * | |
463 | * 2004/01/05 - Amir Noam <amir.noam at intel dot com> | |
464 | * - Save bonding parameters per bond instead of using the global values. | |
465 | * Set version to 2.5.4. | |
466 | * | |
467 | * 2004/01/14 - Shmulik Hen <shmulik.hen at intel dot com> | |
468 | * - Enhance VLAN support: | |
469 | * * Add support for VLAN hardware acceleration capable slaves. | |
470 | * * Add capability to tag self generated packets in ALB/TLB modes. | |
471 | * Set version to 2.6.0. | |
472 | * 2004/10/29 - Mitch Williams <mitch.a.williams at intel dot com> | |
473 | * - Fixed bug when unloading module while using 802.3ad. If | |
474 | * spinlock debugging is turned on, this causes a stack dump. | |
475 | * Solution is to move call to dev_remove_pack outside of the | |
476 | * spinlock. | |
477 | * Set version to 2.6.1. | |
c3ade5ca JV |
478 | * 2005/06/05 - Jay Vosburgh <fubar@us.ibm.com> |
479 | * - Support for generating gratuitous ARPs in active-backup mode. | |
480 | * Includes support for VLAN tagging all bonding-generated ARPs | |
481 | * as needed. Set version to 2.6.2. | |
169a3e66 JV |
482 | * 2005/06/08 - Jason Gabler <jygabler at lbl dot gov> |
483 | * - alternate hashing policy support for mode 2 | |
484 | * * Added kernel parameter "xmit_hash_policy" to allow the selection | |
485 | * of different hashing policies for mode 2. The original mode 2 | |
486 | * policy is the default, now found in xmit_hash_policy_layer2(). | |
487 | * * Added xmit_hash_policy_layer34() | |
488 | * - Modified by Jay Vosburgh <fubar@us.ibm.com> to also support mode 4. | |
489 | * Set version to 2.6.3. | |
217df670 JV |
490 | * 2005/09/26 - Jay Vosburgh <fubar@us.ibm.com> |
491 | * - Removed backwards compatibility for old ifenslaves. Version 2.6.4. | |
1da177e4 LT |
492 | */ |
493 | ||
494 | //#define BONDING_DEBUG 1 | |
495 | ||
496 | #include <linux/config.h> | |
497 | #include <linux/kernel.h> | |
498 | #include <linux/module.h> | |
499 | #include <linux/sched.h> | |
500 | #include <linux/types.h> | |
501 | #include <linux/fcntl.h> | |
502 | #include <linux/interrupt.h> | |
503 | #include <linux/ptrace.h> | |
504 | #include <linux/ioport.h> | |
505 | #include <linux/in.h> | |
169a3e66 | 506 | #include <net/ip.h> |
1da177e4 | 507 | #include <linux/ip.h> |
169a3e66 JV |
508 | #include <linux/tcp.h> |
509 | #include <linux/udp.h> | |
1da177e4 LT |
510 | #include <linux/slab.h> |
511 | #include <linux/string.h> | |
512 | #include <linux/init.h> | |
513 | #include <linux/timer.h> | |
514 | #include <linux/socket.h> | |
515 | #include <linux/ctype.h> | |
516 | #include <linux/inet.h> | |
517 | #include <linux/bitops.h> | |
518 | #include <asm/system.h> | |
519 | #include <asm/io.h> | |
520 | #include <asm/dma.h> | |
521 | #include <asm/uaccess.h> | |
522 | #include <linux/errno.h> | |
523 | #include <linux/netdevice.h> | |
524 | #include <linux/inetdevice.h> | |
525 | #include <linux/etherdevice.h> | |
526 | #include <linux/skbuff.h> | |
527 | #include <net/sock.h> | |
528 | #include <linux/rtnetlink.h> | |
529 | #include <linux/proc_fs.h> | |
530 | #include <linux/seq_file.h> | |
531 | #include <linux/smp.h> | |
532 | #include <linux/if_ether.h> | |
533 | #include <net/arp.h> | |
534 | #include <linux/mii.h> | |
535 | #include <linux/ethtool.h> | |
536 | #include <linux/if_vlan.h> | |
537 | #include <linux/if_bonding.h> | |
c3ade5ca | 538 | #include <net/route.h> |
1da177e4 LT |
539 | #include "bonding.h" |
540 | #include "bond_3ad.h" | |
541 | #include "bond_alb.h" | |
542 | ||
543 | /*---------------------------- Module parameters ----------------------------*/ | |
544 | ||
545 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
546 | #define BOND_LINK_MON_INTERV 0 | |
547 | #define BOND_LINK_ARP_INTERV 0 | |
548 | ||
549 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
550 | static int miimon = BOND_LINK_MON_INTERV; | |
551 | static int updelay = 0; | |
552 | static int downdelay = 0; | |
553 | static int use_carrier = 1; | |
554 | static char *mode = NULL; | |
555 | static char *primary = NULL; | |
556 | static char *lacp_rate = NULL; | |
169a3e66 | 557 | static char *xmit_hash_policy = NULL; |
1da177e4 LT |
558 | static int arp_interval = BOND_LINK_ARP_INTERV; |
559 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
12479f9a | 560 | struct bond_params bonding_defaults; |
1da177e4 LT |
561 | |
562 | module_param(max_bonds, int, 0); | |
563 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
564 | module_param(miimon, int, 0); | |
565 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
566 | module_param(updelay, int, 0); | |
567 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
568 | module_param(downdelay, int, 0); | |
2ac47660 MW |
569 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
570 | "in milliseconds"); | |
1da177e4 | 571 | module_param(use_carrier, int, 0); |
2ac47660 MW |
572 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
573 | "0 for off, 1 for on (default)"); | |
1da177e4 | 574 | module_param(mode, charp, 0); |
2ac47660 MW |
575 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
576 | "1 for active-backup, 2 for balance-xor, " | |
577 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
578 | "6 for balance-alb"); | |
1da177e4 LT |
579 | module_param(primary, charp, 0); |
580 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
581 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
582 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
583 | "(slow/fast)"); | |
169a3e66 | 584 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
585 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
586 | ", 1 for layer 3+4"); | |
1da177e4 LT |
587 | module_param(arp_interval, int, 0); |
588 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
589 | module_param_array(arp_ip_target, charp, NULL, 0); | |
590 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
591 | ||
592 | /*----------------------------- Global variables ----------------------------*/ | |
593 | ||
594 | static const char *version = | |
595 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; | |
596 | ||
12479f9a | 597 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
598 | |
599 | #ifdef CONFIG_PROC_FS | |
600 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
601 | #endif | |
602 | ||
603 | static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; | |
604 | static int arp_ip_count = 0; | |
1da177e4 | 605 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
169a3e66 | 606 | static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; |
1da177e4 | 607 | static int lacp_fast = 0; |
217df670 | 608 | |
1da177e4 | 609 | |
12479f9a | 610 | struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
611 | { "slow", AD_LACP_SLOW}, |
612 | { "fast", AD_LACP_FAST}, | |
613 | { NULL, -1}, | |
614 | }; | |
615 | ||
12479f9a | 616 | struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
617 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
618 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
619 | { "balance-xor", BOND_MODE_XOR}, | |
620 | { "broadcast", BOND_MODE_BROADCAST}, | |
621 | { "802.3ad", BOND_MODE_8023AD}, | |
622 | { "balance-tlb", BOND_MODE_TLB}, | |
623 | { "balance-alb", BOND_MODE_ALB}, | |
624 | { NULL, -1}, | |
625 | }; | |
626 | ||
12479f9a | 627 | struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
628 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
629 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
630 | { NULL, -1}, | |
631 | }; | |
632 | ||
1da177e4 LT |
633 | /*-------------------------- Forward declarations ---------------------------*/ |
634 | ||
c3ade5ca | 635 | static void bond_send_gratuitous_arp(struct bonding *bond); |
1da177e4 LT |
636 | |
637 | /*---------------------------- General routines -----------------------------*/ | |
638 | ||
a77b5325 | 639 | const char *bond_mode_name(int mode) |
1da177e4 LT |
640 | { |
641 | switch (mode) { | |
642 | case BOND_MODE_ROUNDROBIN : | |
643 | return "load balancing (round-robin)"; | |
644 | case BOND_MODE_ACTIVEBACKUP : | |
645 | return "fault-tolerance (active-backup)"; | |
646 | case BOND_MODE_XOR : | |
647 | return "load balancing (xor)"; | |
648 | case BOND_MODE_BROADCAST : | |
649 | return "fault-tolerance (broadcast)"; | |
650 | case BOND_MODE_8023AD: | |
651 | return "IEEE 802.3ad Dynamic link aggregation"; | |
652 | case BOND_MODE_TLB: | |
653 | return "transmit load balancing"; | |
654 | case BOND_MODE_ALB: | |
655 | return "adaptive load balancing"; | |
656 | default: | |
657 | return "unknown"; | |
658 | } | |
659 | } | |
660 | ||
661 | /*---------------------------------- VLAN -----------------------------------*/ | |
662 | ||
663 | /** | |
664 | * bond_add_vlan - add a new vlan id on bond | |
665 | * @bond: bond that got the notification | |
666 | * @vlan_id: the vlan id to add | |
667 | * | |
668 | * Returns -ENOMEM if allocation failed. | |
669 | */ | |
670 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
671 | { | |
672 | struct vlan_entry *vlan; | |
673 | ||
674 | dprintk("bond: %s, vlan id %d\n", | |
675 | (bond ? bond->dev->name: "None"), vlan_id); | |
676 | ||
677 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
678 | if (!vlan) { | |
679 | return -ENOMEM; | |
680 | } | |
681 | ||
682 | INIT_LIST_HEAD(&vlan->vlan_list); | |
683 | vlan->vlan_id = vlan_id; | |
c3ade5ca | 684 | vlan->vlan_ip = 0; |
1da177e4 LT |
685 | |
686 | write_lock_bh(&bond->lock); | |
687 | ||
688 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
689 | ||
690 | write_unlock_bh(&bond->lock); | |
691 | ||
692 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | /** | |
698 | * bond_del_vlan - delete a vlan id from bond | |
699 | * @bond: bond that got the notification | |
700 | * @vlan_id: the vlan id to delete | |
701 | * | |
702 | * returns -ENODEV if @vlan_id was not found in @bond. | |
703 | */ | |
704 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
705 | { | |
706 | struct vlan_entry *vlan, *next; | |
707 | int res = -ENODEV; | |
708 | ||
709 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
710 | ||
711 | write_lock_bh(&bond->lock); | |
712 | ||
713 | list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { | |
714 | if (vlan->vlan_id == vlan_id) { | |
715 | list_del(&vlan->vlan_list); | |
716 | ||
717 | if ((bond->params.mode == BOND_MODE_TLB) || | |
718 | (bond->params.mode == BOND_MODE_ALB)) { | |
719 | bond_alb_clear_vlan(bond, vlan_id); | |
720 | } | |
721 | ||
722 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
723 | bond->dev->name); | |
724 | ||
725 | kfree(vlan); | |
726 | ||
727 | if (list_empty(&bond->vlan_list) && | |
728 | (bond->slave_cnt == 0)) { | |
729 | /* Last VLAN removed and no slaves, so | |
730 | * restore block on adding VLANs. This will | |
731 | * be removed once new slaves that are not | |
732 | * VLAN challenged will be added. | |
733 | */ | |
734 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
735 | } | |
736 | ||
737 | res = 0; | |
738 | goto out; | |
739 | } | |
740 | } | |
741 | ||
742 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
743 | bond->dev->name); | |
744 | ||
745 | out: | |
746 | write_unlock_bh(&bond->lock); | |
747 | return res; | |
748 | } | |
749 | ||
750 | /** | |
751 | * bond_has_challenged_slaves | |
752 | * @bond: the bond we're working on | |
753 | * | |
754 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
755 | * was found, 0 otherwise. | |
756 | * | |
757 | * Assumes bond->lock is held. | |
758 | */ | |
759 | static int bond_has_challenged_slaves(struct bonding *bond) | |
760 | { | |
761 | struct slave *slave; | |
762 | int i; | |
763 | ||
764 | bond_for_each_slave(bond, slave, i) { | |
765 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
766 | dprintk("found VLAN challenged slave - %s\n", | |
767 | slave->dev->name); | |
768 | return 1; | |
769 | } | |
770 | } | |
771 | ||
772 | dprintk("no VLAN challenged slaves found\n"); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | /** | |
777 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
778 | * @bond: the bond we're working on | |
779 | * @curr: item we're advancing from | |
780 | * | |
781 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
782 | * or @curr->next otherwise (even if it is @curr itself again). | |
783 | * | |
784 | * Caller must hold bond->lock | |
785 | */ | |
786 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
787 | { | |
788 | struct vlan_entry *next, *last; | |
789 | ||
790 | if (list_empty(&bond->vlan_list)) { | |
791 | return NULL; | |
792 | } | |
793 | ||
794 | if (!curr) { | |
795 | next = list_entry(bond->vlan_list.next, | |
796 | struct vlan_entry, vlan_list); | |
797 | } else { | |
798 | last = list_entry(bond->vlan_list.prev, | |
799 | struct vlan_entry, vlan_list); | |
800 | if (last == curr) { | |
801 | next = list_entry(bond->vlan_list.next, | |
802 | struct vlan_entry, vlan_list); | |
803 | } else { | |
804 | next = list_entry(curr->vlan_list.next, | |
805 | struct vlan_entry, vlan_list); | |
806 | } | |
807 | } | |
808 | ||
809 | return next; | |
810 | } | |
811 | ||
812 | /** | |
813 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
814 | * | |
815 | * @bond: bond device that got this skb for tx. | |
816 | * @skb: hw accel VLAN tagged skb to transmit | |
817 | * @slave_dev: slave that is supposed to xmit this skbuff | |
818 | * | |
819 | * When the bond gets an skb to transmit that is | |
820 | * already hardware accelerated VLAN tagged, and it | |
821 | * needs to relay this skb to a slave that is not | |
822 | * hw accel capable, the skb needs to be "unaccelerated", | |
823 | * i.e. strip the hwaccel tag and re-insert it as part | |
824 | * of the payload. | |
825 | */ | |
826 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
827 | { | |
828 | unsigned short vlan_id; | |
829 | ||
830 | if (!list_empty(&bond->vlan_list) && | |
831 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
832 | vlan_get_tag(skb, &vlan_id) == 0) { | |
833 | skb->dev = slave_dev; | |
834 | skb = vlan_put_tag(skb, vlan_id); | |
835 | if (!skb) { | |
836 | /* vlan_put_tag() frees the skb in case of error, | |
837 | * so return success here so the calling functions | |
838 | * won't attempt to free is again. | |
839 | */ | |
840 | return 0; | |
841 | } | |
842 | } else { | |
843 | skb->dev = slave_dev; | |
844 | } | |
845 | ||
846 | skb->priority = 1; | |
847 | dev_queue_xmit(skb); | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | /* | |
853 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
854 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
855 | * lock because: | |
856 | * a. This operation is performed in IOCTL context, | |
857 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
858 | * c. Holding a lock with BH disabled while directly calling a base driver | |
859 | * entry point is generally a BAD idea. | |
860 | * | |
861 | * The design of synchronization/protection for this operation in the 8021q | |
862 | * module is good for one or more VLAN devices over a single physical device | |
863 | * and cannot be extended for a teaming solution like bonding, so there is a | |
864 | * potential race condition here where a net device from the vlan group might | |
865 | * be referenced (either by a base driver or the 8021q code) while it is being | |
866 | * removed from the system. However, it turns out we're not making matters | |
867 | * worse, and if it works for regular VLAN usage it will work here too. | |
868 | */ | |
869 | ||
870 | /** | |
871 | * bond_vlan_rx_register - Propagates registration to slaves | |
872 | * @bond_dev: bonding net device that got called | |
873 | * @grp: vlan group being registered | |
874 | */ | |
875 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
876 | { | |
877 | struct bonding *bond = bond_dev->priv; | |
878 | struct slave *slave; | |
879 | int i; | |
880 | ||
881 | bond->vlgrp = grp; | |
882 | ||
883 | bond_for_each_slave(bond, slave, i) { | |
884 | struct net_device *slave_dev = slave->dev; | |
885 | ||
886 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
887 | slave_dev->vlan_rx_register) { | |
888 | slave_dev->vlan_rx_register(slave_dev, grp); | |
889 | } | |
890 | } | |
891 | } | |
892 | ||
893 | /** | |
894 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
895 | * @bond_dev: bonding net device that got called | |
896 | * @vid: vlan id being added | |
897 | */ | |
898 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
899 | { | |
900 | struct bonding *bond = bond_dev->priv; | |
901 | struct slave *slave; | |
902 | int i, res; | |
903 | ||
904 | bond_for_each_slave(bond, slave, i) { | |
905 | struct net_device *slave_dev = slave->dev; | |
906 | ||
907 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
908 | slave_dev->vlan_rx_add_vid) { | |
909 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
910 | } | |
911 | } | |
912 | ||
913 | res = bond_add_vlan(bond, vid); | |
914 | if (res) { | |
915 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 916 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
917 | bond_dev->name, vid); |
918 | } | |
919 | } | |
920 | ||
921 | /** | |
922 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
923 | * @bond_dev: bonding net device that got called | |
924 | * @vid: vlan id being removed | |
925 | */ | |
926 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
927 | { | |
928 | struct bonding *bond = bond_dev->priv; | |
929 | struct slave *slave; | |
930 | struct net_device *vlan_dev; | |
931 | int i, res; | |
932 | ||
933 | bond_for_each_slave(bond, slave, i) { | |
934 | struct net_device *slave_dev = slave->dev; | |
935 | ||
936 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
937 | slave_dev->vlan_rx_kill_vid) { | |
938 | /* Save and then restore vlan_dev in the grp array, | |
939 | * since the slave's driver might clear it. | |
940 | */ | |
941 | vlan_dev = bond->vlgrp->vlan_devices[vid]; | |
942 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); | |
943 | bond->vlgrp->vlan_devices[vid] = vlan_dev; | |
944 | } | |
945 | } | |
946 | ||
947 | res = bond_del_vlan(bond, vid); | |
948 | if (res) { | |
949 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 950 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
951 | bond_dev->name, vid); |
952 | } | |
953 | } | |
954 | ||
955 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
956 | { | |
957 | struct vlan_entry *vlan; | |
958 | ||
959 | write_lock_bh(&bond->lock); | |
960 | ||
961 | if (list_empty(&bond->vlan_list)) { | |
962 | goto out; | |
963 | } | |
964 | ||
965 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
966 | slave_dev->vlan_rx_register) { | |
967 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
968 | } | |
969 | ||
970 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
971 | !(slave_dev->vlan_rx_add_vid)) { | |
972 | goto out; | |
973 | } | |
974 | ||
975 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
976 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
977 | } | |
978 | ||
979 | out: | |
980 | write_unlock_bh(&bond->lock); | |
981 | } | |
982 | ||
983 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
984 | { | |
985 | struct vlan_entry *vlan; | |
986 | struct net_device *vlan_dev; | |
987 | ||
988 | write_lock_bh(&bond->lock); | |
989 | ||
990 | if (list_empty(&bond->vlan_list)) { | |
991 | goto out; | |
992 | } | |
993 | ||
994 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
995 | !(slave_dev->vlan_rx_kill_vid)) { | |
996 | goto unreg; | |
997 | } | |
998 | ||
999 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
1000 | /* Save and then restore vlan_dev in the grp array, | |
1001 | * since the slave's driver might clear it. | |
1002 | */ | |
1003 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
1004 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); | |
1005 | bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; | |
1006 | } | |
1007 | ||
1008 | unreg: | |
1009 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
1010 | slave_dev->vlan_rx_register) { | |
1011 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
1012 | } | |
1013 | ||
1014 | out: | |
1015 | write_unlock_bh(&bond->lock); | |
1016 | } | |
1017 | ||
1018 | /*------------------------------- Link status -------------------------------*/ | |
1019 | ||
1020 | /* | |
1021 | * Get link speed and duplex from the slave's base driver | |
1022 | * using ethtool. If for some reason the call fails or the | |
1023 | * values are invalid, fake speed and duplex to 100/Full | |
1024 | * and return error. | |
1025 | */ | |
1026 | static int bond_update_speed_duplex(struct slave *slave) | |
1027 | { | |
1028 | struct net_device *slave_dev = slave->dev; | |
1029 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1030 | struct ifreq ifr; | |
1031 | struct ethtool_cmd etool; | |
1032 | ||
1033 | /* Fake speed and duplex */ | |
1034 | slave->speed = SPEED_100; | |
1035 | slave->duplex = DUPLEX_FULL; | |
1036 | ||
1037 | if (slave_dev->ethtool_ops) { | |
1038 | u32 res; | |
1039 | ||
1040 | if (!slave_dev->ethtool_ops->get_settings) { | |
1041 | return -1; | |
1042 | } | |
1043 | ||
1044 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); | |
1045 | if (res < 0) { | |
1046 | return -1; | |
1047 | } | |
1048 | ||
1049 | goto verify; | |
1050 | } | |
1051 | ||
1052 | ioctl = slave_dev->do_ioctl; | |
1053 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1054 | etool.cmd = ETHTOOL_GSET; | |
1055 | ifr.ifr_data = (char*)&etool; | |
1056 | if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { | |
1057 | return -1; | |
1058 | } | |
1059 | ||
1060 | verify: | |
1061 | switch (etool.speed) { | |
1062 | case SPEED_10: | |
1063 | case SPEED_100: | |
1064 | case SPEED_1000: | |
1065 | break; | |
1066 | default: | |
1067 | return -1; | |
1068 | } | |
1069 | ||
1070 | switch (etool.duplex) { | |
1071 | case DUPLEX_FULL: | |
1072 | case DUPLEX_HALF: | |
1073 | break; | |
1074 | default: | |
1075 | return -1; | |
1076 | } | |
1077 | ||
1078 | slave->speed = etool.speed; | |
1079 | slave->duplex = etool.duplex; | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * if <dev> supports MII link status reporting, check its link status. | |
1086 | * | |
1087 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
1088 | * depening upon the setting of the use_carrier parameter. | |
1089 | * | |
1090 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
1091 | * can't tell and just pretend it is), or 0, meaning that the link is | |
1092 | * down. | |
1093 | * | |
1094 | * If reporting is non-zero, instead of faking link up, return -1 if | |
1095 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
1096 | * support them). If use_carrier is set, return whatever it says. | |
1097 | * It'd be nice if there was a good way to tell if a driver supports | |
1098 | * netif_carrier, but there really isn't. | |
1099 | */ | |
1100 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
1101 | { | |
1102 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1103 | struct ifreq ifr; | |
1104 | struct mii_ioctl_data *mii; | |
1105 | struct ethtool_value etool; | |
1106 | ||
1107 | if (bond->params.use_carrier) { | |
1108 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
1109 | } | |
1110 | ||
1111 | ioctl = slave_dev->do_ioctl; | |
1112 | if (ioctl) { | |
1113 | /* TODO: set pointer to correct ioctl on a per team member */ | |
1114 | /* bases to make this more efficient. that is, once */ | |
1115 | /* we determine the correct ioctl, we will always */ | |
1116 | /* call it and not the others for that team */ | |
1117 | /* member. */ | |
1118 | ||
1119 | /* | |
1120 | * We cannot assume that SIOCGMIIPHY will also read a | |
1121 | * register; not all network drivers (e.g., e100) | |
1122 | * support that. | |
1123 | */ | |
1124 | ||
1125 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
1126 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1127 | mii = if_mii(&ifr); | |
1128 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
1129 | mii->reg_num = MII_BMSR; | |
1130 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
1131 | return (mii->val_out & BMSR_LSTATUS); | |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ | |
1137 | /* for a period of time so we attempt to get link status */ | |
1138 | /* from it last if the above MII ioctls fail... */ | |
1139 | if (slave_dev->ethtool_ops) { | |
1140 | if (slave_dev->ethtool_ops->get_link) { | |
1141 | u32 link; | |
1142 | ||
1143 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
1144 | ||
1145 | return link ? BMSR_LSTATUS : 0; | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | if (ioctl) { | |
1150 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1151 | etool.cmd = ETHTOOL_GLINK; | |
1152 | ifr.ifr_data = (char*)&etool; | |
1153 | if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { | |
1154 | if (etool.data == 1) { | |
1155 | return BMSR_LSTATUS; | |
1156 | } else { | |
1157 | dprintk("SIOCETHTOOL shows link down\n"); | |
1158 | return 0; | |
1159 | } | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * If reporting, report that either there's no dev->do_ioctl, | |
1165 | * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we | |
1166 | * cannot report link status). If not reporting, pretend | |
1167 | * we're ok. | |
1168 | */ | |
1169 | return (reporting ? -1 : BMSR_LSTATUS); | |
1170 | } | |
1171 | ||
1172 | /*----------------------------- Multicast list ------------------------------*/ | |
1173 | ||
1174 | /* | |
1175 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
1176 | */ | |
1177 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
1178 | { | |
1179 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
1180 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * returns dmi entry if found, NULL otherwise | |
1185 | */ | |
1186 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
1187 | { | |
1188 | struct dev_mc_list *idmi; | |
1189 | ||
1190 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
1191 | if (bond_is_dmi_same(dmi, idmi)) { | |
1192 | return idmi; | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | return NULL; | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Push the promiscuity flag down to appropriate slaves | |
1201 | */ | |
1202 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
1203 | { | |
1204 | if (USES_PRIMARY(bond->params.mode)) { | |
1205 | /* write lock already acquired */ | |
1206 | if (bond->curr_active_slave) { | |
1207 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
1208 | } | |
1209 | } else { | |
1210 | struct slave *slave; | |
1211 | int i; | |
1212 | bond_for_each_slave(bond, slave, i) { | |
1213 | dev_set_promiscuity(slave->dev, inc); | |
1214 | } | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Push the allmulti flag down to all slaves | |
1220 | */ | |
1221 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
1222 | { | |
1223 | if (USES_PRIMARY(bond->params.mode)) { | |
1224 | /* write lock already acquired */ | |
1225 | if (bond->curr_active_slave) { | |
1226 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
1227 | } | |
1228 | } else { | |
1229 | struct slave *slave; | |
1230 | int i; | |
1231 | bond_for_each_slave(bond, slave, i) { | |
1232 | dev_set_allmulti(slave->dev, inc); | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Add a Multicast address to slaves | |
1239 | * according to mode | |
1240 | */ | |
1241 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
1242 | { | |
1243 | if (USES_PRIMARY(bond->params.mode)) { | |
1244 | /* write lock already acquired */ | |
1245 | if (bond->curr_active_slave) { | |
1246 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
1247 | } | |
1248 | } else { | |
1249 | struct slave *slave; | |
1250 | int i; | |
1251 | bond_for_each_slave(bond, slave, i) { | |
1252 | dev_mc_add(slave->dev, addr, alen, 0); | |
1253 | } | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Remove a multicast address from slave | |
1259 | * according to mode | |
1260 | */ | |
1261 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
1262 | { | |
1263 | if (USES_PRIMARY(bond->params.mode)) { | |
1264 | /* write lock already acquired */ | |
1265 | if (bond->curr_active_slave) { | |
1266 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
1267 | } | |
1268 | } else { | |
1269 | struct slave *slave; | |
1270 | int i; | |
1271 | bond_for_each_slave(bond, slave, i) { | |
1272 | dev_mc_delete(slave->dev, addr, alen, 0); | |
1273 | } | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * Totally destroys the mc_list in bond | |
1279 | */ | |
1280 | static void bond_mc_list_destroy(struct bonding *bond) | |
1281 | { | |
1282 | struct dev_mc_list *dmi; | |
1283 | ||
1284 | dmi = bond->mc_list; | |
1285 | while (dmi) { | |
1286 | bond->mc_list = dmi->next; | |
1287 | kfree(dmi); | |
1288 | dmi = bond->mc_list; | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Copy all the Multicast addresses from src to the bonding device dst | |
1294 | */ | |
de54f390 | 1295 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 1296 | gfp_t gfp_flag) |
1da177e4 LT |
1297 | { |
1298 | struct dev_mc_list *dmi, *new_dmi; | |
1299 | ||
1300 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 1301 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
1302 | |
1303 | if (!new_dmi) { | |
1304 | /* FIXME: Potential memory leak !!! */ | |
1305 | return -ENOMEM; | |
1306 | } | |
1307 | ||
1308 | new_dmi->next = bond->mc_list; | |
1309 | bond->mc_list = new_dmi; | |
1310 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
1311 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
1312 | new_dmi->dmi_users = dmi->dmi_users; | |
1313 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
1314 | } | |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * flush all members of flush->mc_list from device dev->mc_list | |
1321 | */ | |
1322 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
1323 | { | |
1324 | struct bonding *bond = bond_dev->priv; | |
1325 | struct dev_mc_list *dmi; | |
1326 | ||
1327 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1328 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1329 | } | |
1330 | ||
1331 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1332 | /* del lacpdu mc addr from mc list */ | |
1333 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1334 | ||
1335 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | /*--------------------------- Active slave change ---------------------------*/ | |
1340 | ||
1341 | /* | |
1342 | * Update the mc list and multicast-related flags for the new and | |
1343 | * old active slaves (if any) according to the multicast mode, and | |
1344 | * promiscuous flags unconditionally. | |
1345 | */ | |
1346 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
1347 | { | |
1348 | struct dev_mc_list *dmi; | |
1349 | ||
1350 | if (!USES_PRIMARY(bond->params.mode)) { | |
1351 | /* nothing to do - mc list is already up-to-date on | |
1352 | * all slaves | |
1353 | */ | |
1354 | return; | |
1355 | } | |
1356 | ||
1357 | if (old_active) { | |
1358 | if (bond->dev->flags & IFF_PROMISC) { | |
1359 | dev_set_promiscuity(old_active->dev, -1); | |
1360 | } | |
1361 | ||
1362 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1363 | dev_set_allmulti(old_active->dev, -1); | |
1364 | } | |
1365 | ||
1366 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1367 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | if (new_active) { | |
1372 | if (bond->dev->flags & IFF_PROMISC) { | |
1373 | dev_set_promiscuity(new_active->dev, 1); | |
1374 | } | |
1375 | ||
1376 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1377 | dev_set_allmulti(new_active->dev, 1); | |
1378 | } | |
1379 | ||
1380 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1381 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /** | |
1387 | * find_best_interface - select the best available slave to be the active one | |
1388 | * @bond: our bonding struct | |
1389 | * | |
1390 | * Warning: Caller must hold curr_slave_lock for writing. | |
1391 | */ | |
1392 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1393 | { | |
1394 | struct slave *new_active, *old_active; | |
1395 | struct slave *bestslave = NULL; | |
1396 | int mintime = bond->params.updelay; | |
1397 | int i; | |
1398 | ||
1399 | new_active = old_active = bond->curr_active_slave; | |
1400 | ||
1401 | if (!new_active) { /* there were no active slaves left */ | |
1402 | if (bond->slave_cnt > 0) { /* found one slave */ | |
1403 | new_active = bond->first_slave; | |
1404 | } else { | |
1405 | return NULL; /* still no slave, return NULL */ | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | /* first try the primary link; if arping, a link must tx/rx traffic | |
1410 | * before it can be considered the curr_active_slave - also, we would skip | |
1411 | * slaves between the curr_active_slave and primary_slave that may be up | |
1412 | * and able to arp | |
1413 | */ | |
1414 | if ((bond->primary_slave) && | |
1415 | (!bond->params.arp_interval) && | |
1416 | (IS_UP(bond->primary_slave->dev))) { | |
1417 | new_active = bond->primary_slave; | |
1418 | } | |
1419 | ||
1420 | /* remember where to stop iterating over the slaves */ | |
1421 | old_active = new_active; | |
1422 | ||
1423 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1424 | if (IS_UP(new_active->dev)) { | |
1425 | if (new_active->link == BOND_LINK_UP) { | |
1426 | return new_active; | |
1427 | } else if (new_active->link == BOND_LINK_BACK) { | |
1428 | /* link up, but waiting for stabilization */ | |
1429 | if (new_active->delay < mintime) { | |
1430 | mintime = new_active->delay; | |
1431 | bestslave = new_active; | |
1432 | } | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | return bestslave; | |
1438 | } | |
1439 | ||
1440 | /** | |
1441 | * change_active_interface - change the active slave into the specified one | |
1442 | * @bond: our bonding struct | |
1443 | * @new: the new slave to make the active one | |
1444 | * | |
1445 | * Set the new slave to the bond's settings and unset them on the old | |
1446 | * curr_active_slave. | |
1447 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1448 | * | |
1449 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1450 | * because it is apparently the best available slave we have, even though its | |
1451 | * updelay hasn't timed out yet. | |
1452 | * | |
1453 | * Warning: Caller must hold curr_slave_lock for writing. | |
1454 | */ | |
a77b5325 | 1455 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1456 | { |
1457 | struct slave *old_active = bond->curr_active_slave; | |
1458 | ||
1459 | if (old_active == new_active) { | |
1460 | return; | |
1461 | } | |
1462 | ||
1463 | if (new_active) { | |
1464 | if (new_active->link == BOND_LINK_BACK) { | |
1465 | if (USES_PRIMARY(bond->params.mode)) { | |
1466 | printk(KERN_INFO DRV_NAME | |
1467 | ": %s: making interface %s the new " | |
1468 | "active one %d ms earlier.\n", | |
1469 | bond->dev->name, new_active->dev->name, | |
1470 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1471 | } | |
1472 | ||
1473 | new_active->delay = 0; | |
1474 | new_active->link = BOND_LINK_UP; | |
1475 | new_active->jiffies = jiffies; | |
1476 | ||
1477 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1478 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1479 | } | |
1480 | ||
1481 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1482 | (bond->params.mode == BOND_MODE_ALB)) { | |
1483 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1484 | } | |
1485 | } else { | |
1486 | if (USES_PRIMARY(bond->params.mode)) { | |
1487 | printk(KERN_INFO DRV_NAME | |
1488 | ": %s: making interface %s the new " | |
1489 | "active one.\n", | |
1490 | bond->dev->name, new_active->dev->name); | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | ||
1da177e4 LT |
1495 | if (USES_PRIMARY(bond->params.mode)) { |
1496 | bond_mc_swap(bond, new_active, old_active); | |
1497 | } | |
1498 | ||
1499 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1500 | (bond->params.mode == BOND_MODE_ALB)) { | |
1501 | bond_alb_handle_active_change(bond, new_active); | |
1502 | } else { | |
1503 | bond->curr_active_slave = new_active; | |
1504 | } | |
c3ade5ca JV |
1505 | |
1506 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1507 | if (old_active) { | |
1508 | bond_set_slave_inactive_flags(old_active); | |
1509 | } | |
1510 | ||
1511 | if (new_active) { | |
1512 | bond_set_slave_active_flags(new_active); | |
1513 | } | |
1514 | bond_send_gratuitous_arp(bond); | |
1515 | } | |
1da177e4 LT |
1516 | } |
1517 | ||
1518 | /** | |
1519 | * bond_select_active_slave - select a new active slave, if needed | |
1520 | * @bond: our bonding struct | |
1521 | * | |
1522 | * This functions shoud be called when one of the following occurs: | |
1523 | * - The old curr_active_slave has been released or lost its link. | |
1524 | * - The primary_slave has got its link back. | |
1525 | * - A slave has got its link back and there's no old curr_active_slave. | |
1526 | * | |
1527 | * Warning: Caller must hold curr_slave_lock for writing. | |
1528 | */ | |
a77b5325 | 1529 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1530 | { |
1531 | struct slave *best_slave; | |
1532 | ||
1533 | best_slave = bond_find_best_slave(bond); | |
1534 | if (best_slave != bond->curr_active_slave) { | |
1535 | bond_change_active_slave(bond, best_slave); | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | /*--------------------------- slave list handling ---------------------------*/ | |
1540 | ||
1541 | /* | |
1542 | * This function attaches the slave to the end of list. | |
1543 | * | |
1544 | * bond->lock held for writing by caller. | |
1545 | */ | |
1546 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1547 | { | |
1548 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1549 | new_slave->next = new_slave; | |
1550 | new_slave->prev = new_slave; | |
1551 | bond->first_slave = new_slave; | |
1552 | } else { | |
1553 | new_slave->next = bond->first_slave; | |
1554 | new_slave->prev = bond->first_slave->prev; | |
1555 | new_slave->next->prev = new_slave; | |
1556 | new_slave->prev->next = new_slave; | |
1557 | } | |
1558 | ||
1559 | bond->slave_cnt++; | |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * This function detaches the slave from the list. | |
1564 | * WARNING: no check is made to verify if the slave effectively | |
1565 | * belongs to <bond>. | |
1566 | * Nothing is freed on return, structures are just unchained. | |
1567 | * If any slave pointer in bond was pointing to <slave>, | |
1568 | * it should be changed by the calling function. | |
1569 | * | |
1570 | * bond->lock held for writing by caller. | |
1571 | */ | |
1572 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1573 | { | |
1574 | if (slave->next) { | |
1575 | slave->next->prev = slave->prev; | |
1576 | } | |
1577 | ||
1578 | if (slave->prev) { | |
1579 | slave->prev->next = slave->next; | |
1580 | } | |
1581 | ||
1582 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1583 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1584 | bond->first_slave = slave->next; | |
1585 | } else { | |
1586 | bond->first_slave = NULL; /* slave was the last one */ | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | slave->next = NULL; | |
1591 | slave->prev = NULL; | |
1592 | bond->slave_cnt--; | |
1593 | } | |
1594 | ||
1595 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1596 | ||
a77b5325 | 1597 | int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1598 | { |
1599 | dprintk("bond_dev=%p\n", bond_dev); | |
1600 | dprintk("slave_dev=%p\n", slave_dev); | |
1601 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1602 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1603 | return 0; | |
1604 | } | |
1605 | ||
8531c5ff AK |
1606 | #define BOND_INTERSECT_FEATURES \ |
1607 | (NETIF_F_SG|NETIF_F_IP_CSUM|NETIF_F_NO_CSUM|NETIF_F_HW_CSUM) | |
1608 | ||
1609 | /* | |
8e3babcd JV |
1610 | * Compute the common dev->feature set available to all slaves. Some |
1611 | * feature bits are managed elsewhere, so preserve feature bits set on | |
1612 | * master device that are not part of the examined set. | |
8531c5ff AK |
1613 | */ |
1614 | static int bond_compute_features(struct bonding *bond) | |
1615 | { | |
8e3babcd | 1616 | unsigned long features = BOND_INTERSECT_FEATURES; |
8531c5ff AK |
1617 | struct slave *slave; |
1618 | struct net_device *bond_dev = bond->dev; | |
8e3babcd | 1619 | int i; |
8531c5ff | 1620 | |
8e3babcd JV |
1621 | bond_for_each_slave(bond, slave, i) |
1622 | features &= (slave->dev->features & BOND_INTERSECT_FEATURES); | |
8531c5ff | 1623 | |
8531c5ff | 1624 | if ((features & NETIF_F_SG) && |
8e3babcd JV |
1625 | !(features & (NETIF_F_IP_CSUM | |
1626 | NETIF_F_NO_CSUM | | |
1627 | NETIF_F_HW_CSUM))) | |
8531c5ff | 1628 | features &= ~NETIF_F_SG; |
8531c5ff | 1629 | |
8e3babcd | 1630 | features |= (bond_dev->features & ~BOND_INTERSECT_FEATURES); |
8531c5ff AK |
1631 | bond_dev->features = features; |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1da177e4 | 1636 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1637 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1638 | { |
1639 | struct bonding *bond = bond_dev->priv; | |
1640 | struct slave *new_slave = NULL; | |
1641 | struct dev_mc_list *dmi; | |
1642 | struct sockaddr addr; | |
1643 | int link_reporting; | |
1644 | int old_features = bond_dev->features; | |
1645 | int res = 0; | |
1646 | ||
552709d5 | 1647 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
1648 | slave_dev->do_ioctl == NULL) { | |
1da177e4 | 1649 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1650 | ": %s: Warning: no link monitoring support for %s\n", |
1651 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1652 | } |
1653 | ||
1654 | /* bond must be initialized by bond_open() before enslaving */ | |
1655 | if (!(bond_dev->flags & IFF_UP)) { | |
1656 | dprintk("Error, master_dev is not up\n"); | |
1657 | return -EPERM; | |
1658 | } | |
1659 | ||
1660 | /* already enslaved */ | |
1661 | if (slave_dev->flags & IFF_SLAVE) { | |
1662 | dprintk("Error, Device was already enslaved\n"); | |
1663 | return -EBUSY; | |
1664 | } | |
1665 | ||
1666 | /* vlan challenged mutual exclusion */ | |
1667 | /* no need to lock since we're protected by rtnl_lock */ | |
1668 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1669 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1670 | if (!list_empty(&bond->vlan_list)) { | |
1671 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1672 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1673 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1674 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1675 | bond_dev->name); |
1676 | return -EPERM; | |
1677 | } else { | |
1678 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1679 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1680 | "slave %s. Adding VLANs will be blocked as " |
1681 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1682 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1683 | bond_dev->name); |
1684 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1685 | } | |
1686 | } else { | |
1687 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1688 | if (bond->slave_cnt == 0) { | |
1689 | /* First slave, and it is not VLAN challenged, | |
1690 | * so remove the block of adding VLANs over the bond. | |
1691 | */ | |
1692 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1693 | } | |
1694 | } | |
1695 | ||
217df670 JV |
1696 | /* |
1697 | * Old ifenslave binaries are no longer supported. These can | |
1698 | * be identified with moderate accurary by the state of the slave: | |
1699 | * the current ifenslave will set the interface down prior to | |
1700 | * enslaving it; the old ifenslave will not. | |
1701 | */ | |
1702 | if ((slave_dev->flags & IFF_UP)) { | |
1703 | printk(KERN_ERR DRV_NAME ": %s is up. " | |
1704 | "This may be due to an out of date ifenslave.\n", | |
1705 | slave_dev->name); | |
1706 | res = -EPERM; | |
1707 | goto err_undo_flags; | |
1708 | } | |
1da177e4 | 1709 | |
217df670 JV |
1710 | if (slave_dev->set_mac_address == NULL) { |
1711 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
1712 | ": %s: Error: The slave device you specified does " |
1713 | "not support setting the MAC address. " | |
1714 | "Your kernel likely does not support slave " | |
1715 | "devices.\n", bond_dev->name); | |
1716 | res = -EOPNOTSUPP; | |
217df670 | 1717 | goto err_undo_flags; |
1da177e4 LT |
1718 | } |
1719 | ||
1720 | new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); | |
1721 | if (!new_slave) { | |
1722 | res = -ENOMEM; | |
1723 | goto err_undo_flags; | |
1724 | } | |
1725 | ||
1726 | memset(new_slave, 0, sizeof(struct slave)); | |
1727 | ||
1728 | /* save slave's original flags before calling | |
1729 | * netdev_set_master and dev_open | |
1730 | */ | |
1731 | new_slave->original_flags = slave_dev->flags; | |
1732 | ||
217df670 JV |
1733 | /* |
1734 | * Save slave's original ("permanent") mac address for modes | |
1735 | * that need it, and for restoring it upon release, and then | |
1736 | * set it to the master's address | |
1737 | */ | |
1738 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1739 | |
217df670 JV |
1740 | /* |
1741 | * Set slave to master's mac address. The application already | |
1742 | * set the master's mac address to that of the first slave | |
1743 | */ | |
1744 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1745 | addr.sa_family = slave_dev->type; | |
1746 | res = dev_set_mac_address(slave_dev, &addr); | |
1747 | if (res) { | |
1748 | dprintk("Error %d calling set_mac_address\n", res); | |
1749 | goto err_free; | |
1750 | } | |
1da177e4 | 1751 | |
217df670 JV |
1752 | /* open the slave since the application closed it */ |
1753 | res = dev_open(slave_dev); | |
1754 | if (res) { | |
1755 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
1756 | goto err_restore_mac; | |
1da177e4 LT |
1757 | } |
1758 | ||
1759 | res = netdev_set_master(slave_dev, bond_dev); | |
1760 | if (res) { | |
1761 | dprintk("Error %d calling netdev_set_master\n", res); | |
217df670 | 1762 | goto err_close; |
1da177e4 LT |
1763 | } |
1764 | ||
1765 | new_slave->dev = slave_dev; | |
1766 | ||
1767 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1768 | (bond->params.mode == BOND_MODE_ALB)) { | |
1769 | /* bond_alb_init_slave() must be called before all other stages since | |
1770 | * it might fail and we do not want to have to undo everything | |
1771 | */ | |
1772 | res = bond_alb_init_slave(bond, new_slave); | |
1773 | if (res) { | |
1774 | goto err_unset_master; | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1779 | * master's promisc (and mc) settings only if it becomes the | |
1780 | * curr_active_slave, and that is taken care of later when calling | |
1781 | * bond_change_active() | |
1782 | */ | |
1783 | if (!USES_PRIMARY(bond->params.mode)) { | |
1784 | /* set promiscuity level to new slave */ | |
1785 | if (bond_dev->flags & IFF_PROMISC) { | |
1786 | dev_set_promiscuity(slave_dev, 1); | |
1787 | } | |
1788 | ||
1789 | /* set allmulti level to new slave */ | |
1790 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1791 | dev_set_allmulti(slave_dev, 1); | |
1792 | } | |
1793 | ||
1794 | /* upload master's mc_list to new slave */ | |
1795 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1796 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1801 | /* add lacpdu mc addr to mc list */ | |
1802 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1803 | ||
1804 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1805 | } | |
1806 | ||
1807 | bond_add_vlans_on_slave(bond, slave_dev); | |
1808 | ||
1809 | write_lock_bh(&bond->lock); | |
1810 | ||
1811 | bond_attach_slave(bond, new_slave); | |
1812 | ||
1813 | new_slave->delay = 0; | |
1814 | new_slave->link_failure_count = 0; | |
1815 | ||
8531c5ff AK |
1816 | bond_compute_features(bond); |
1817 | ||
1da177e4 LT |
1818 | if (bond->params.miimon && !bond->params.use_carrier) { |
1819 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1820 | ||
1821 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1822 | /* | |
1823 | * miimon is set but a bonded network driver | |
1824 | * does not support ETHTOOL/MII and | |
1825 | * arp_interval is not set. Note: if | |
1826 | * use_carrier is enabled, we will never go | |
1827 | * here (because netif_carrier is always | |
1828 | * supported); thus, we don't need to change | |
1829 | * the messages for netif_carrier. | |
1830 | */ | |
1831 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1832 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1833 | "available for interface %s, and " |
1834 | "arp_interval/arp_ip_target module parameters " | |
1835 | "not specified, thus bonding will not detect " | |
1836 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1837 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1838 | } else if (link_reporting == -1) { |
1839 | /* unable get link status using mii/ethtool */ | |
1840 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1841 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1842 | "interface %s; the network driver associated " |
1843 | "with this interface does not support MII or " | |
1844 | "ETHTOOL link status reporting, thus miimon " | |
1845 | "has no effect on this interface.\n", | |
4e0952c7 | 1846 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1847 | } |
1848 | } | |
1849 | ||
1850 | /* check for initial state */ | |
1851 | if (!bond->params.miimon || | |
1852 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1853 | if (bond->params.updelay) { | |
1854 | dprintk("Initial state of slave_dev is " | |
1855 | "BOND_LINK_BACK\n"); | |
1856 | new_slave->link = BOND_LINK_BACK; | |
1857 | new_slave->delay = bond->params.updelay; | |
1858 | } else { | |
1859 | dprintk("Initial state of slave_dev is " | |
1860 | "BOND_LINK_UP\n"); | |
1861 | new_slave->link = BOND_LINK_UP; | |
1862 | } | |
1863 | new_slave->jiffies = jiffies; | |
1864 | } else { | |
1865 | dprintk("Initial state of slave_dev is " | |
1866 | "BOND_LINK_DOWN\n"); | |
1867 | new_slave->link = BOND_LINK_DOWN; | |
1868 | } | |
1869 | ||
1870 | if (bond_update_speed_duplex(new_slave) && | |
1871 | (new_slave->link != BOND_LINK_DOWN)) { | |
1872 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1873 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1874 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1875 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1876 | |
1877 | if (bond->params.mode == BOND_MODE_8023AD) { | |
4e0952c7 MW |
1878 | printk(KERN_WARNING DRV_NAME |
1879 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " | |
1da177e4 | 1880 | "support in base driver for proper aggregator " |
4e0952c7 | 1881 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1882 | } |
1883 | } | |
1884 | ||
1885 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1886 | /* if there is a primary slave, remember it */ | |
1887 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1888 | bond->primary_slave = new_slave; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | switch (bond->params.mode) { | |
1893 | case BOND_MODE_ACTIVEBACKUP: | |
1894 | /* if we're in active-backup mode, we need one and only one active | |
1895 | * interface. The backup interfaces will have their NOARP flag set | |
1896 | * because we need them to be completely deaf and not to respond to | |
1897 | * any ARP request on the network to avoid fooling a switch. Thus, | |
1898 | * since we guarantee that curr_active_slave always point to the last | |
1899 | * usable interface, we just have to verify this interface's flag. | |
1900 | */ | |
1901 | if (((!bond->curr_active_slave) || | |
1902 | (bond->curr_active_slave->dev->flags & IFF_NOARP)) && | |
1903 | (new_slave->link != BOND_LINK_DOWN)) { | |
1904 | dprintk("This is the first active slave\n"); | |
1905 | /* first slave or no active slave yet, and this link | |
1906 | is OK, so make this interface the active one */ | |
1907 | bond_change_active_slave(bond, new_slave); | |
1908 | } else { | |
1909 | dprintk("This is just a backup slave\n"); | |
1910 | bond_set_slave_inactive_flags(new_slave); | |
1911 | } | |
1912 | break; | |
1913 | case BOND_MODE_8023AD: | |
1914 | /* in 802.3ad mode, the internal mechanism | |
1915 | * will activate the slaves in the selected | |
1916 | * aggregator | |
1917 | */ | |
1918 | bond_set_slave_inactive_flags(new_slave); | |
1919 | /* if this is the first slave */ | |
1920 | if (bond->slave_cnt == 1) { | |
1921 | SLAVE_AD_INFO(new_slave).id = 1; | |
1922 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1923 | * can be called only after the mac address of the bond is set | |
1924 | */ | |
1925 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1926 | bond->params.lacp_fast); | |
1927 | } else { | |
1928 | SLAVE_AD_INFO(new_slave).id = | |
1929 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1930 | } | |
1931 | ||
1932 | bond_3ad_bind_slave(new_slave); | |
1933 | break; | |
1934 | case BOND_MODE_TLB: | |
1935 | case BOND_MODE_ALB: | |
1936 | new_slave->state = BOND_STATE_ACTIVE; | |
1937 | if ((!bond->curr_active_slave) && | |
1938 | (new_slave->link != BOND_LINK_DOWN)) { | |
1939 | /* first slave or no active slave yet, and this link | |
1940 | * is OK, so make this interface the active one | |
1941 | */ | |
1942 | bond_change_active_slave(bond, new_slave); | |
1943 | } | |
1944 | break; | |
1945 | default: | |
1946 | dprintk("This slave is always active in trunk mode\n"); | |
1947 | ||
1948 | /* always active in trunk mode */ | |
1949 | new_slave->state = BOND_STATE_ACTIVE; | |
1950 | ||
1951 | /* In trunking mode there is little meaning to curr_active_slave | |
1952 | * anyway (it holds no special properties of the bond device), | |
1953 | * so we can change it without calling change_active_interface() | |
1954 | */ | |
1955 | if (!bond->curr_active_slave) { | |
1956 | bond->curr_active_slave = new_slave; | |
1957 | } | |
1958 | break; | |
1959 | } /* switch(bond_mode) */ | |
1960 | ||
1961 | write_unlock_bh(&bond->lock); | |
1962 | ||
1da177e4 LT |
1963 | printk(KERN_INFO DRV_NAME |
1964 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1965 | bond_dev->name, slave_dev->name, | |
1966 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1967 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1968 | ||
1969 | /* enslave is successful */ | |
1970 | return 0; | |
1971 | ||
1972 | /* Undo stages on error */ | |
1973 | err_unset_master: | |
1974 | netdev_set_master(slave_dev, NULL); | |
1975 | ||
1976 | err_close: | |
1977 | dev_close(slave_dev); | |
1978 | ||
1979 | err_restore_mac: | |
1980 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); | |
1981 | addr.sa_family = slave_dev->type; | |
1982 | dev_set_mac_address(slave_dev, &addr); | |
1983 | ||
1984 | err_free: | |
1985 | kfree(new_slave); | |
1986 | ||
1987 | err_undo_flags: | |
1988 | bond_dev->features = old_features; | |
8531c5ff | 1989 | |
1da177e4 LT |
1990 | return res; |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * Try to release the slave device <slave> from the bond device <master> | |
1995 | * It is legal to access curr_active_slave without a lock because all the function | |
1996 | * is write-locked. | |
1997 | * | |
1998 | * The rules for slave state should be: | |
1999 | * for Active/Backup: | |
2000 | * Active stays on all backups go down | |
2001 | * for Bonded connections: | |
2002 | * The first up interface should be left on and all others downed. | |
2003 | */ | |
a77b5325 | 2004 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
2005 | { |
2006 | struct bonding *bond = bond_dev->priv; | |
2007 | struct slave *slave, *oldcurrent; | |
2008 | struct sockaddr addr; | |
2009 | int mac_addr_differ; | |
2010 | ||
2011 | /* slave is not a slave or master is not master of this slave */ | |
2012 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2013 | (slave_dev->master != bond_dev)) { | |
2014 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 2015 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
2016 | bond_dev->name, slave_dev->name); |
2017 | return -EINVAL; | |
2018 | } | |
2019 | ||
2020 | write_lock_bh(&bond->lock); | |
2021 | ||
2022 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
2023 | if (!slave) { | |
2024 | /* not a slave of this bond */ | |
2025 | printk(KERN_INFO DRV_NAME | |
2026 | ": %s: %s not enslaved\n", | |
2027 | bond_dev->name, slave_dev->name); | |
2028 | return -EINVAL; | |
2029 | } | |
2030 | ||
2031 | mac_addr_differ = memcmp(bond_dev->dev_addr, | |
2032 | slave->perm_hwaddr, | |
2033 | ETH_ALEN); | |
2034 | if (!mac_addr_differ && (bond->slave_cnt > 1)) { | |
2035 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 2036 | ": %s: Warning: the permanent HWaddr of %s " |
1da177e4 LT |
2037 | "- %02X:%02X:%02X:%02X:%02X:%02X - is " |
2038 | "still in use by %s. Set the HWaddr of " | |
2039 | "%s to a different address to avoid " | |
2040 | "conflicts.\n", | |
4e0952c7 | 2041 | bond_dev->name, |
1da177e4 LT |
2042 | slave_dev->name, |
2043 | slave->perm_hwaddr[0], | |
2044 | slave->perm_hwaddr[1], | |
2045 | slave->perm_hwaddr[2], | |
2046 | slave->perm_hwaddr[3], | |
2047 | slave->perm_hwaddr[4], | |
2048 | slave->perm_hwaddr[5], | |
2049 | bond_dev->name, | |
2050 | slave_dev->name); | |
2051 | } | |
2052 | ||
2053 | /* Inform AD package of unbinding of slave. */ | |
2054 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2055 | /* must be called before the slave is | |
2056 | * detached from the list | |
2057 | */ | |
2058 | bond_3ad_unbind_slave(slave); | |
2059 | } | |
2060 | ||
2061 | printk(KERN_INFO DRV_NAME | |
2062 | ": %s: releasing %s interface %s\n", | |
2063 | bond_dev->name, | |
2064 | (slave->state == BOND_STATE_ACTIVE) | |
2065 | ? "active" : "backup", | |
2066 | slave_dev->name); | |
2067 | ||
2068 | oldcurrent = bond->curr_active_slave; | |
2069 | ||
2070 | bond->current_arp_slave = NULL; | |
2071 | ||
2072 | /* release the slave from its bond */ | |
2073 | bond_detach_slave(bond, slave); | |
2074 | ||
8531c5ff AK |
2075 | bond_compute_features(bond); |
2076 | ||
1da177e4 LT |
2077 | if (bond->primary_slave == slave) { |
2078 | bond->primary_slave = NULL; | |
2079 | } | |
2080 | ||
2081 | if (oldcurrent == slave) { | |
2082 | bond_change_active_slave(bond, NULL); | |
2083 | } | |
2084 | ||
2085 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2086 | (bond->params.mode == BOND_MODE_ALB)) { | |
2087 | /* Must be called only after the slave has been | |
2088 | * detached from the list and the curr_active_slave | |
2089 | * has been cleared (if our_slave == old_current), | |
2090 | * but before a new active slave is selected. | |
2091 | */ | |
2092 | bond_alb_deinit_slave(bond, slave); | |
2093 | } | |
2094 | ||
2095 | if (oldcurrent == slave) { | |
2096 | bond_select_active_slave(bond); | |
2097 | ||
2098 | if (!bond->curr_active_slave) { | |
2099 | printk(KERN_INFO DRV_NAME | |
2100 | ": %s: now running without any active " | |
2101 | "interface !\n", | |
2102 | bond_dev->name); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | if (bond->slave_cnt == 0) { | |
2107 | /* if the last slave was removed, zero the mac address | |
2108 | * of the master so it will be set by the application | |
2109 | * to the mac address of the first slave | |
2110 | */ | |
2111 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2112 | ||
2113 | if (list_empty(&bond->vlan_list)) { | |
2114 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2115 | } else { | |
2116 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 2117 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 2118 | "still has VLANs.\n", |
4e0952c7 | 2119 | bond_dev->name, bond_dev->name); |
1da177e4 | 2120 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
2121 | ": %s: When re-adding slaves, make sure the bond's " |
2122 | "HW address matches its VLANs'.\n", | |
2123 | bond_dev->name); | |
1da177e4 LT |
2124 | } |
2125 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2126 | !bond_has_challenged_slaves(bond)) { | |
2127 | printk(KERN_INFO DRV_NAME | |
4e0952c7 | 2128 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 2129 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 2130 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
2131 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
2132 | } | |
2133 | ||
2134 | write_unlock_bh(&bond->lock); | |
2135 | ||
2136 | bond_del_vlans_from_slave(bond, slave_dev); | |
2137 | ||
2138 | /* If the mode USES_PRIMARY, then we should only remove its | |
2139 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2140 | * already taken care of above when we detached the slave | |
2141 | */ | |
2142 | if (!USES_PRIMARY(bond->params.mode)) { | |
2143 | /* unset promiscuity level from slave */ | |
2144 | if (bond_dev->flags & IFF_PROMISC) { | |
2145 | dev_set_promiscuity(slave_dev, -1); | |
2146 | } | |
2147 | ||
2148 | /* unset allmulti level from slave */ | |
2149 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2150 | dev_set_allmulti(slave_dev, -1); | |
2151 | } | |
2152 | ||
2153 | /* flush master's mc_list from slave */ | |
2154 | bond_mc_list_flush(bond_dev, slave_dev); | |
2155 | } | |
2156 | ||
2157 | netdev_set_master(slave_dev, NULL); | |
2158 | ||
2159 | /* close slave before restoring its mac address */ | |
2160 | dev_close(slave_dev); | |
2161 | ||
217df670 JV |
2162 | /* restore original ("permanent") mac address */ |
2163 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2164 | addr.sa_family = slave_dev->type; | |
2165 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 LT |
2166 | |
2167 | /* restore the original state of the | |
2168 | * IFF_NOARP flag that might have been | |
2169 | * set by bond_set_slave_inactive_flags() | |
2170 | */ | |
2171 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2172 | slave_dev->flags &= ~IFF_NOARP; | |
2173 | } | |
2174 | ||
2175 | kfree(slave); | |
2176 | ||
2177 | return 0; /* deletion OK */ | |
2178 | } | |
2179 | ||
2180 | /* | |
2181 | * This function releases all slaves. | |
2182 | */ | |
2183 | static int bond_release_all(struct net_device *bond_dev) | |
2184 | { | |
2185 | struct bonding *bond = bond_dev->priv; | |
2186 | struct slave *slave; | |
2187 | struct net_device *slave_dev; | |
2188 | struct sockaddr addr; | |
2189 | ||
2190 | write_lock_bh(&bond->lock); | |
2191 | ||
2192 | if (bond->slave_cnt == 0) { | |
2193 | goto out; | |
2194 | } | |
2195 | ||
2196 | bond->current_arp_slave = NULL; | |
2197 | bond->primary_slave = NULL; | |
2198 | bond_change_active_slave(bond, NULL); | |
2199 | ||
2200 | while ((slave = bond->first_slave) != NULL) { | |
2201 | /* Inform AD package of unbinding of slave | |
2202 | * before slave is detached from the list. | |
2203 | */ | |
2204 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2205 | bond_3ad_unbind_slave(slave); | |
2206 | } | |
2207 | ||
2208 | slave_dev = slave->dev; | |
2209 | bond_detach_slave(bond, slave); | |
2210 | ||
2211 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2212 | (bond->params.mode == BOND_MODE_ALB)) { | |
2213 | /* must be called only after the slave | |
2214 | * has been detached from the list | |
2215 | */ | |
2216 | bond_alb_deinit_slave(bond, slave); | |
2217 | } | |
2218 | ||
8531c5ff AK |
2219 | bond_compute_features(bond); |
2220 | ||
1da177e4 LT |
2221 | /* now that the slave is detached, unlock and perform |
2222 | * all the undo steps that should not be called from | |
2223 | * within a lock. | |
2224 | */ | |
2225 | write_unlock_bh(&bond->lock); | |
2226 | ||
2227 | bond_del_vlans_from_slave(bond, slave_dev); | |
2228 | ||
2229 | /* If the mode USES_PRIMARY, then we should only remove its | |
2230 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2231 | * already taken care of above when we detached the slave | |
2232 | */ | |
2233 | if (!USES_PRIMARY(bond->params.mode)) { | |
2234 | /* unset promiscuity level from slave */ | |
2235 | if (bond_dev->flags & IFF_PROMISC) { | |
2236 | dev_set_promiscuity(slave_dev, -1); | |
2237 | } | |
2238 | ||
2239 | /* unset allmulti level from slave */ | |
2240 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2241 | dev_set_allmulti(slave_dev, -1); | |
2242 | } | |
2243 | ||
2244 | /* flush master's mc_list from slave */ | |
2245 | bond_mc_list_flush(bond_dev, slave_dev); | |
2246 | } | |
2247 | ||
2248 | netdev_set_master(slave_dev, NULL); | |
2249 | ||
2250 | /* close slave before restoring its mac address */ | |
2251 | dev_close(slave_dev); | |
2252 | ||
217df670 JV |
2253 | /* restore original ("permanent") mac address*/ |
2254 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2255 | addr.sa_family = slave_dev->type; | |
2256 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 LT |
2257 | |
2258 | /* restore the original state of the IFF_NOARP flag that might have | |
2259 | * been set by bond_set_slave_inactive_flags() | |
2260 | */ | |
2261 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2262 | slave_dev->flags &= ~IFF_NOARP; | |
2263 | } | |
2264 | ||
2265 | kfree(slave); | |
2266 | ||
2267 | /* re-acquire the lock before getting the next slave */ | |
2268 | write_lock_bh(&bond->lock); | |
2269 | } | |
2270 | ||
2271 | /* zero the mac address of the master so it will be | |
2272 | * set by the application to the mac address of the | |
2273 | * first slave | |
2274 | */ | |
2275 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2276 | ||
2277 | if (list_empty(&bond->vlan_list)) { | |
2278 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2279 | } else { | |
2280 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 2281 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 2282 | "still has VLANs.\n", |
4e0952c7 | 2283 | bond_dev->name, bond_dev->name); |
1da177e4 | 2284 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
2285 | ": %s: When re-adding slaves, make sure the bond's " |
2286 | "HW address matches its VLANs'.\n", | |
2287 | bond_dev->name); | |
1da177e4 LT |
2288 | } |
2289 | ||
2290 | printk(KERN_INFO DRV_NAME | |
2291 | ": %s: released all slaves\n", | |
2292 | bond_dev->name); | |
2293 | ||
2294 | out: | |
2295 | write_unlock_bh(&bond->lock); | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | * This function changes the active slave to slave <slave_dev>. | |
2302 | * It returns -EINVAL in the following cases. | |
2303 | * - <slave_dev> is not found in the list. | |
2304 | * - There is not active slave now. | |
2305 | * - <slave_dev> is already active. | |
2306 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2307 | * - <slave_dev> is not running. | |
2308 | * In these cases, this fuction does nothing. | |
2309 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
2310 | */ | |
2311 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2312 | { | |
2313 | struct bonding *bond = bond_dev->priv; | |
2314 | struct slave *old_active = NULL; | |
2315 | struct slave *new_active = NULL; | |
2316 | int res = 0; | |
2317 | ||
2318 | if (!USES_PRIMARY(bond->params.mode)) { | |
2319 | return -EINVAL; | |
2320 | } | |
2321 | ||
2322 | /* Verify that master_dev is indeed the master of slave_dev */ | |
2323 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2324 | (slave_dev->master != bond_dev)) { | |
2325 | return -EINVAL; | |
2326 | } | |
2327 | ||
2328 | write_lock_bh(&bond->lock); | |
2329 | ||
2330 | old_active = bond->curr_active_slave; | |
2331 | new_active = bond_get_slave_by_dev(bond, slave_dev); | |
2332 | ||
2333 | /* | |
2334 | * Changing to the current active: do nothing; return success. | |
2335 | */ | |
2336 | if (new_active && (new_active == old_active)) { | |
2337 | write_unlock_bh(&bond->lock); | |
2338 | return 0; | |
2339 | } | |
2340 | ||
2341 | if ((new_active) && | |
2342 | (old_active) && | |
2343 | (new_active->link == BOND_LINK_UP) && | |
2344 | IS_UP(new_active->dev)) { | |
2345 | bond_change_active_slave(bond, new_active); | |
2346 | } else { | |
2347 | res = -EINVAL; | |
2348 | } | |
2349 | ||
2350 | write_unlock_bh(&bond->lock); | |
2351 | ||
2352 | return res; | |
2353 | } | |
2354 | ||
1da177e4 LT |
2355 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2356 | { | |
2357 | struct bonding *bond = bond_dev->priv; | |
2358 | ||
2359 | info->bond_mode = bond->params.mode; | |
2360 | info->miimon = bond->params.miimon; | |
2361 | ||
2362 | read_lock_bh(&bond->lock); | |
2363 | info->num_slaves = bond->slave_cnt; | |
2364 | read_unlock_bh(&bond->lock); | |
2365 | ||
2366 | return 0; | |
2367 | } | |
2368 | ||
2369 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2370 | { | |
2371 | struct bonding *bond = bond_dev->priv; | |
2372 | struct slave *slave; | |
2373 | int i, found = 0; | |
2374 | ||
2375 | if (info->slave_id < 0) { | |
2376 | return -ENODEV; | |
2377 | } | |
2378 | ||
2379 | read_lock_bh(&bond->lock); | |
2380 | ||
2381 | bond_for_each_slave(bond, slave, i) { | |
2382 | if (i == (int)info->slave_id) { | |
2383 | found = 1; | |
2384 | break; | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | read_unlock_bh(&bond->lock); | |
2389 | ||
2390 | if (found) { | |
2391 | strcpy(info->slave_name, slave->dev->name); | |
2392 | info->link = slave->link; | |
2393 | info->state = slave->state; | |
2394 | info->link_failure_count = slave->link_failure_count; | |
2395 | } else { | |
2396 | return -ENODEV; | |
2397 | } | |
2398 | ||
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | /*-------------------------------- Monitoring -------------------------------*/ | |
2403 | ||
2404 | /* this function is called regularly to monitor each slave's link. */ | |
a77b5325 | 2405 | void bond_mii_monitor(struct net_device *bond_dev) |
1da177e4 LT |
2406 | { |
2407 | struct bonding *bond = bond_dev->priv; | |
2408 | struct slave *slave, *oldcurrent; | |
2409 | int do_failover = 0; | |
2410 | int delta_in_ticks; | |
2411 | int i; | |
2412 | ||
2413 | read_lock(&bond->lock); | |
2414 | ||
2415 | delta_in_ticks = (bond->params.miimon * HZ) / 1000; | |
2416 | ||
2417 | if (bond->kill_timers) { | |
2418 | goto out; | |
2419 | } | |
2420 | ||
2421 | if (bond->slave_cnt == 0) { | |
2422 | goto re_arm; | |
2423 | } | |
2424 | ||
2425 | /* we will try to read the link status of each of our slaves, and | |
2426 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2427 | * supporting MII status, we won't do anything so that a user-space | |
2428 | * program could monitor the link itself if needed. | |
2429 | */ | |
2430 | ||
2431 | read_lock(&bond->curr_slave_lock); | |
2432 | oldcurrent = bond->curr_active_slave; | |
2433 | read_unlock(&bond->curr_slave_lock); | |
2434 | ||
2435 | bond_for_each_slave(bond, slave, i) { | |
2436 | struct net_device *slave_dev = slave->dev; | |
2437 | int link_state; | |
2438 | u16 old_speed = slave->speed; | |
2439 | u8 old_duplex = slave->duplex; | |
2440 | ||
2441 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2442 | ||
2443 | switch (slave->link) { | |
2444 | case BOND_LINK_UP: /* the link was up */ | |
2445 | if (link_state == BMSR_LSTATUS) { | |
2446 | /* link stays up, nothing more to do */ | |
2447 | break; | |
2448 | } else { /* link going down */ | |
2449 | slave->link = BOND_LINK_FAIL; | |
2450 | slave->delay = bond->params.downdelay; | |
2451 | ||
2452 | if (slave->link_failure_count < UINT_MAX) { | |
2453 | slave->link_failure_count++; | |
2454 | } | |
2455 | ||
2456 | if (bond->params.downdelay) { | |
2457 | printk(KERN_INFO DRV_NAME | |
2458 | ": %s: link status down for %s " | |
2459 | "interface %s, disabling it in " | |
2460 | "%d ms.\n", | |
2461 | bond_dev->name, | |
2462 | IS_UP(slave_dev) | |
2463 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2464 | ? ((slave == oldcurrent) | |
2465 | ? "active " : "backup ") | |
2466 | : "") | |
2467 | : "idle ", | |
2468 | slave_dev->name, | |
2469 | bond->params.downdelay * bond->params.miimon); | |
2470 | } | |
2471 | } | |
2472 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2473 | ensure proper action to be taken | |
2474 | */ | |
2475 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2476 | if (link_state != BMSR_LSTATUS) { | |
2477 | /* link stays down */ | |
2478 | if (slave->delay <= 0) { | |
2479 | /* link down for too long time */ | |
2480 | slave->link = BOND_LINK_DOWN; | |
2481 | ||
2482 | /* in active/backup mode, we must | |
2483 | * completely disable this interface | |
2484 | */ | |
2485 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2486 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2487 | bond_set_slave_inactive_flags(slave); | |
2488 | } | |
2489 | ||
2490 | printk(KERN_INFO DRV_NAME | |
2491 | ": %s: link status definitely " | |
2492 | "down for interface %s, " | |
2493 | "disabling it\n", | |
2494 | bond_dev->name, | |
2495 | slave_dev->name); | |
2496 | ||
2497 | /* notify ad that the link status has changed */ | |
2498 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2499 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2500 | } | |
2501 | ||
2502 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2503 | (bond->params.mode == BOND_MODE_ALB)) { | |
2504 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2505 | } | |
2506 | ||
2507 | if (slave == oldcurrent) { | |
2508 | do_failover = 1; | |
2509 | } | |
2510 | } else { | |
2511 | slave->delay--; | |
2512 | } | |
2513 | } else { | |
2514 | /* link up again */ | |
2515 | slave->link = BOND_LINK_UP; | |
2516 | slave->jiffies = jiffies; | |
2517 | printk(KERN_INFO DRV_NAME | |
2518 | ": %s: link status up again after %d " | |
2519 | "ms for interface %s.\n", | |
2520 | bond_dev->name, | |
2521 | (bond->params.downdelay - slave->delay) * bond->params.miimon, | |
2522 | slave_dev->name); | |
2523 | } | |
2524 | break; | |
2525 | case BOND_LINK_DOWN: /* the link was down */ | |
2526 | if (link_state != BMSR_LSTATUS) { | |
2527 | /* the link stays down, nothing more to do */ | |
2528 | break; | |
2529 | } else { /* link going up */ | |
2530 | slave->link = BOND_LINK_BACK; | |
2531 | slave->delay = bond->params.updelay; | |
2532 | ||
2533 | if (bond->params.updelay) { | |
2534 | /* if updelay == 0, no need to | |
2535 | advertise about a 0 ms delay */ | |
2536 | printk(KERN_INFO DRV_NAME | |
2537 | ": %s: link status up for " | |
2538 | "interface %s, enabling it " | |
2539 | "in %d ms.\n", | |
2540 | bond_dev->name, | |
2541 | slave_dev->name, | |
2542 | bond->params.updelay * bond->params.miimon); | |
2543 | } | |
2544 | } | |
2545 | /* no break ! fall through the BOND_LINK_BACK state in | |
2546 | case there's something to do. | |
2547 | */ | |
2548 | case BOND_LINK_BACK: /* the link has just come back */ | |
2549 | if (link_state != BMSR_LSTATUS) { | |
2550 | /* link down again */ | |
2551 | slave->link = BOND_LINK_DOWN; | |
2552 | ||
2553 | printk(KERN_INFO DRV_NAME | |
2554 | ": %s: link status down again after %d " | |
2555 | "ms for interface %s.\n", | |
2556 | bond_dev->name, | |
2557 | (bond->params.updelay - slave->delay) * bond->params.miimon, | |
2558 | slave_dev->name); | |
2559 | } else { | |
2560 | /* link stays up */ | |
2561 | if (slave->delay == 0) { | |
2562 | /* now the link has been up for long time enough */ | |
2563 | slave->link = BOND_LINK_UP; | |
2564 | slave->jiffies = jiffies; | |
2565 | ||
2566 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2567 | /* prevent it from being the active one */ | |
2568 | slave->state = BOND_STATE_BACKUP; | |
2569 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2570 | /* make it immediately active */ | |
2571 | slave->state = BOND_STATE_ACTIVE; | |
2572 | } else if (slave != bond->primary_slave) { | |
2573 | /* prevent it from being the active one */ | |
2574 | slave->state = BOND_STATE_BACKUP; | |
2575 | } | |
2576 | ||
2577 | printk(KERN_INFO DRV_NAME | |
2578 | ": %s: link status definitely " | |
2579 | "up for interface %s.\n", | |
2580 | bond_dev->name, | |
2581 | slave_dev->name); | |
2582 | ||
2583 | /* notify ad that the link status has changed */ | |
2584 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2585 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2586 | } | |
2587 | ||
2588 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2589 | (bond->params.mode == BOND_MODE_ALB)) { | |
2590 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2591 | } | |
2592 | ||
2593 | if ((!oldcurrent) || | |
2594 | (slave == bond->primary_slave)) { | |
2595 | do_failover = 1; | |
2596 | } | |
2597 | } else { | |
2598 | slave->delay--; | |
2599 | } | |
2600 | } | |
2601 | break; | |
2602 | default: | |
2603 | /* Should not happen */ | |
4e0952c7 MW |
2604 | printk(KERN_ERR DRV_NAME |
2605 | ": %s: Error: %s Illegal value (link=%d)\n", | |
2606 | bond_dev->name, | |
2607 | slave->dev->name, | |
2608 | slave->link); | |
1da177e4 LT |
2609 | goto out; |
2610 | } /* end of switch (slave->link) */ | |
2611 | ||
2612 | bond_update_speed_duplex(slave); | |
2613 | ||
2614 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2615 | if (old_speed != slave->speed) { | |
2616 | bond_3ad_adapter_speed_changed(slave); | |
2617 | } | |
2618 | ||
2619 | if (old_duplex != slave->duplex) { | |
2620 | bond_3ad_adapter_duplex_changed(slave); | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | } /* end of for */ | |
2625 | ||
2626 | if (do_failover) { | |
2627 | write_lock(&bond->curr_slave_lock); | |
2628 | ||
2629 | bond_select_active_slave(bond); | |
2630 | ||
2631 | if (oldcurrent && !bond->curr_active_slave) { | |
2632 | printk(KERN_INFO DRV_NAME | |
2633 | ": %s: now running without any active " | |
2634 | "interface !\n", | |
2635 | bond_dev->name); | |
2636 | } | |
2637 | ||
2638 | write_unlock(&bond->curr_slave_lock); | |
2639 | } | |
2640 | ||
2641 | re_arm: | |
2642 | if (bond->params.miimon) { | |
2643 | mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); | |
2644 | } | |
2645 | out: | |
2646 | read_unlock(&bond->lock); | |
2647 | } | |
2648 | ||
c3ade5ca JV |
2649 | |
2650 | static u32 bond_glean_dev_ip(struct net_device *dev) | |
2651 | { | |
2652 | struct in_device *idev; | |
2653 | struct in_ifaddr *ifa; | |
2654 | u32 addr = 0; | |
2655 | ||
2656 | if (!dev) | |
2657 | return 0; | |
2658 | ||
2659 | rcu_read_lock(); | |
e5ed6399 | 2660 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2661 | if (!idev) |
2662 | goto out; | |
2663 | ||
2664 | ifa = idev->ifa_list; | |
2665 | if (!ifa) | |
2666 | goto out; | |
2667 | ||
2668 | addr = ifa->ifa_local; | |
2669 | out: | |
2670 | rcu_read_unlock(); | |
2671 | return addr; | |
2672 | } | |
2673 | ||
2674 | static int bond_has_ip(struct bonding *bond) | |
2675 | { | |
2676 | struct vlan_entry *vlan, *vlan_next; | |
2677 | ||
2678 | if (bond->master_ip) | |
2679 | return 1; | |
2680 | ||
2681 | if (list_empty(&bond->vlan_list)) | |
2682 | return 0; | |
2683 | ||
2684 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2685 | vlan_list) { | |
2686 | if (vlan->vlan_ip) | |
2687 | return 1; | |
2688 | } | |
2689 | ||
2690 | return 0; | |
2691 | } | |
2692 | ||
2693 | /* | |
2694 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2695 | * switches in VLAN mode (especially if ports are configured as | |
2696 | * "native" to a VLAN) might not pass non-tagged frames. | |
2697 | */ | |
2698 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id) | |
2699 | { | |
2700 | struct sk_buff *skb; | |
2701 | ||
2702 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2703 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2704 | ||
2705 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2706 | NULL, slave_dev->dev_addr, NULL); | |
2707 | ||
2708 | if (!skb) { | |
2709 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2710 | return; | |
2711 | } | |
2712 | if (vlan_id) { | |
2713 | skb = vlan_put_tag(skb, vlan_id); | |
2714 | if (!skb) { | |
2715 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2716 | return; | |
2717 | } | |
2718 | } | |
2719 | arp_xmit(skb); | |
2720 | } | |
2721 | ||
2722 | ||
1da177e4 LT |
2723 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2724 | { | |
c3ade5ca | 2725 | int i, vlan_id, rv; |
1da177e4 | 2726 | u32 *targets = bond->params.arp_targets; |
c3ade5ca JV |
2727 | struct vlan_entry *vlan, *vlan_next; |
2728 | struct net_device *vlan_dev; | |
2729 | struct flowi fl; | |
2730 | struct rtable *rt; | |
1da177e4 LT |
2731 | |
2732 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
c3ade5ca JV |
2733 | dprintk("basa: target %x\n", targets[i]); |
2734 | if (list_empty(&bond->vlan_list)) { | |
2735 | dprintk("basa: empty vlan: arp_send\n"); | |
2736 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2737 | bond->master_ip, 0); | |
2738 | continue; | |
2739 | } | |
2740 | ||
2741 | /* | |
2742 | * If VLANs are configured, we do a route lookup to | |
2743 | * determine which VLAN interface would be used, so we | |
2744 | * can tag the ARP with the proper VLAN tag. | |
2745 | */ | |
2746 | memset(&fl, 0, sizeof(fl)); | |
2747 | fl.fl4_dst = targets[i]; | |
2748 | fl.fl4_tos = RTO_ONLINK; | |
2749 | ||
2750 | rv = ip_route_output_key(&rt, &fl); | |
2751 | if (rv) { | |
2752 | if (net_ratelimit()) { | |
2753 | printk(KERN_WARNING DRV_NAME | |
2754 | ": %s: no route to arp_ip_target %u.%u.%u.%u\n", | |
2755 | bond->dev->name, NIPQUAD(fl.fl4_dst)); | |
2756 | } | |
2757 | continue; | |
2758 | } | |
2759 | ||
2760 | /* | |
2761 | * This target is not on a VLAN | |
2762 | */ | |
2763 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2764 | ip_rt_put(rt); |
c3ade5ca JV |
2765 | dprintk("basa: rtdev == bond->dev: arp_send\n"); |
2766 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2767 | bond->master_ip, 0); | |
2768 | continue; | |
2769 | } | |
2770 | ||
2771 | vlan_id = 0; | |
2772 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2773 | vlan_list) { | |
2774 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2775 | if (vlan_dev == rt->u.dst.dev) { | |
2776 | vlan_id = vlan->vlan_id; | |
2777 | dprintk("basa: vlan match on %s %d\n", | |
2778 | vlan_dev->name, vlan_id); | |
2779 | break; | |
2780 | } | |
2781 | } | |
2782 | ||
2783 | if (vlan_id) { | |
ed4b9f80 | 2784 | ip_rt_put(rt); |
c3ade5ca JV |
2785 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2786 | vlan->vlan_ip, vlan_id); | |
2787 | continue; | |
2788 | } | |
2789 | ||
2790 | if (net_ratelimit()) { | |
2791 | printk(KERN_WARNING DRV_NAME | |
2792 | ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n", | |
2793 | bond->dev->name, NIPQUAD(fl.fl4_dst), | |
2794 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
2795 | } | |
ed4b9f80 | 2796 | ip_rt_put(rt); |
c3ade5ca JV |
2797 | } |
2798 | } | |
2799 | ||
2800 | /* | |
2801 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2802 | * for each VLAN above us. | |
2803 | */ | |
2804 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2805 | { | |
2806 | struct slave *slave = bond->curr_active_slave; | |
2807 | struct vlan_entry *vlan; | |
2808 | struct net_device *vlan_dev; | |
2809 | ||
2810 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2811 | slave ? slave->dev->name : "NULL"); | |
2812 | if (!slave) | |
2813 | return; | |
2814 | ||
2815 | if (bond->master_ip) { | |
2816 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
2817 | bond->master_ip, 0); | |
2818 | } | |
2819 | ||
2820 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
2821 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2822 | if (vlan->vlan_ip) { | |
2823 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2824 | vlan->vlan_ip, vlan->vlan_id); | |
2825 | } | |
1da177e4 LT |
2826 | } |
2827 | } | |
2828 | ||
2829 | /* | |
2830 | * this function is called regularly to monitor each slave's link | |
2831 | * ensuring that traffic is being sent and received when arp monitoring | |
2832 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2833 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2834 | * arp monitoring in active backup mode. | |
2835 | */ | |
a77b5325 | 2836 | void bond_loadbalance_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2837 | { |
2838 | struct bonding *bond = bond_dev->priv; | |
2839 | struct slave *slave, *oldcurrent; | |
2840 | int do_failover = 0; | |
2841 | int delta_in_ticks; | |
2842 | int i; | |
2843 | ||
2844 | read_lock(&bond->lock); | |
2845 | ||
2846 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2847 | ||
2848 | if (bond->kill_timers) { | |
2849 | goto out; | |
2850 | } | |
2851 | ||
2852 | if (bond->slave_cnt == 0) { | |
2853 | goto re_arm; | |
2854 | } | |
2855 | ||
2856 | read_lock(&bond->curr_slave_lock); | |
2857 | oldcurrent = bond->curr_active_slave; | |
2858 | read_unlock(&bond->curr_slave_lock); | |
2859 | ||
2860 | /* see if any of the previous devices are up now (i.e. they have | |
2861 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2862 | * the picture unless it is null. also, slave->jiffies is not needed | |
2863 | * here because we send an arp on each slave and give a slave as | |
2864 | * long as it needs to get the tx/rx within the delta. | |
2865 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2866 | * so it can wait | |
2867 | */ | |
2868 | bond_for_each_slave(bond, slave, i) { | |
2869 | if (slave->link != BOND_LINK_UP) { | |
2870 | if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && | |
2871 | ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { | |
2872 | ||
2873 | slave->link = BOND_LINK_UP; | |
2874 | slave->state = BOND_STATE_ACTIVE; | |
2875 | ||
2876 | /* primary_slave has no meaning in round-robin | |
2877 | * mode. the window of a slave being up and | |
2878 | * curr_active_slave being null after enslaving | |
2879 | * is closed. | |
2880 | */ | |
2881 | if (!oldcurrent) { | |
2882 | printk(KERN_INFO DRV_NAME | |
2883 | ": %s: link status definitely " | |
2884 | "up for interface %s, ", | |
2885 | bond_dev->name, | |
2886 | slave->dev->name); | |
2887 | do_failover = 1; | |
2888 | } else { | |
2889 | printk(KERN_INFO DRV_NAME | |
2890 | ": %s: interface %s is now up\n", | |
2891 | bond_dev->name, | |
2892 | slave->dev->name); | |
2893 | } | |
2894 | } | |
2895 | } else { | |
2896 | /* slave->link == BOND_LINK_UP */ | |
2897 | ||
2898 | /* not all switches will respond to an arp request | |
2899 | * when the source ip is 0, so don't take the link down | |
2900 | * if we don't know our ip yet | |
2901 | */ | |
2902 | if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2903 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
c3ade5ca | 2904 | bond_has_ip(bond))) { |
1da177e4 LT |
2905 | |
2906 | slave->link = BOND_LINK_DOWN; | |
2907 | slave->state = BOND_STATE_BACKUP; | |
2908 | ||
2909 | if (slave->link_failure_count < UINT_MAX) { | |
2910 | slave->link_failure_count++; | |
2911 | } | |
2912 | ||
2913 | printk(KERN_INFO DRV_NAME | |
2914 | ": %s: interface %s is now down.\n", | |
2915 | bond_dev->name, | |
2916 | slave->dev->name); | |
2917 | ||
2918 | if (slave == oldcurrent) { | |
2919 | do_failover = 1; | |
2920 | } | |
2921 | } | |
2922 | } | |
2923 | ||
2924 | /* note: if switch is in round-robin mode, all links | |
2925 | * must tx arp to ensure all links rx an arp - otherwise | |
2926 | * links may oscillate or not come up at all; if switch is | |
2927 | * in something like xor mode, there is nothing we can | |
2928 | * do - all replies will be rx'ed on same link causing slaves | |
2929 | * to be unstable during low/no traffic periods | |
2930 | */ | |
2931 | if (IS_UP(slave->dev)) { | |
2932 | bond_arp_send_all(bond, slave); | |
2933 | } | |
2934 | } | |
2935 | ||
2936 | if (do_failover) { | |
2937 | write_lock(&bond->curr_slave_lock); | |
2938 | ||
2939 | bond_select_active_slave(bond); | |
2940 | ||
2941 | if (oldcurrent && !bond->curr_active_slave) { | |
2942 | printk(KERN_INFO DRV_NAME | |
2943 | ": %s: now running without any active " | |
2944 | "interface !\n", | |
2945 | bond_dev->name); | |
2946 | } | |
2947 | ||
2948 | write_unlock(&bond->curr_slave_lock); | |
2949 | } | |
2950 | ||
2951 | re_arm: | |
2952 | if (bond->params.arp_interval) { | |
2953 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2954 | } | |
2955 | out: | |
2956 | read_unlock(&bond->lock); | |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * When using arp monitoring in active-backup mode, this function is | |
2961 | * called to determine if any backup slaves have went down or a new | |
2962 | * current slave needs to be found. | |
2963 | * The backup slaves never generate traffic, they are considered up by merely | |
2964 | * receiving traffic. If the current slave goes down, each backup slave will | |
2965 | * be given the opportunity to tx/rx an arp before being taken down - this | |
2966 | * prevents all slaves from being taken down due to the current slave not | |
2967 | * sending any traffic for the backups to receive. The arps are not necessarily | |
2968 | * necessary, any tx and rx traffic will keep the current slave up. While any | |
2969 | * rx traffic will keep the backup slaves up, the current slave is responsible | |
2970 | * for generating traffic to keep them up regardless of any other traffic they | |
2971 | * may have received. | |
2972 | * see loadbalance_arp_monitor for arp monitoring in load balancing mode | |
2973 | */ | |
a77b5325 | 2974 | void bond_activebackup_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2975 | { |
2976 | struct bonding *bond = bond_dev->priv; | |
2977 | struct slave *slave; | |
2978 | int delta_in_ticks; | |
2979 | int i; | |
2980 | ||
2981 | read_lock(&bond->lock); | |
2982 | ||
2983 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2984 | ||
2985 | if (bond->kill_timers) { | |
2986 | goto out; | |
2987 | } | |
2988 | ||
2989 | if (bond->slave_cnt == 0) { | |
2990 | goto re_arm; | |
2991 | } | |
2992 | ||
2993 | /* determine if any slave has come up or any backup slave has | |
2994 | * gone down | |
2995 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2996 | * so it can wait | |
2997 | */ | |
2998 | bond_for_each_slave(bond, slave, i) { | |
2999 | if (slave->link != BOND_LINK_UP) { | |
3000 | if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) { | |
3001 | ||
3002 | slave->link = BOND_LINK_UP; | |
3003 | ||
3004 | write_lock(&bond->curr_slave_lock); | |
3005 | ||
3006 | if ((!bond->curr_active_slave) && | |
3007 | ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { | |
3008 | bond_change_active_slave(bond, slave); | |
3009 | bond->current_arp_slave = NULL; | |
3010 | } else if (bond->curr_active_slave != slave) { | |
3011 | /* this slave has just come up but we | |
3012 | * already have a current slave; this | |
3013 | * can also happen if bond_enslave adds | |
3014 | * a new slave that is up while we are | |
3015 | * searching for a new slave | |
3016 | */ | |
3017 | bond_set_slave_inactive_flags(slave); | |
3018 | bond->current_arp_slave = NULL; | |
3019 | } | |
3020 | ||
3021 | if (slave == bond->curr_active_slave) { | |
3022 | printk(KERN_INFO DRV_NAME | |
3023 | ": %s: %s is up and now the " | |
3024 | "active interface\n", | |
3025 | bond_dev->name, | |
3026 | slave->dev->name); | |
3027 | } else { | |
3028 | printk(KERN_INFO DRV_NAME | |
3029 | ": %s: backup interface %s is " | |
3030 | "now up\n", | |
3031 | bond_dev->name, | |
3032 | slave->dev->name); | |
3033 | } | |
3034 | ||
3035 | write_unlock(&bond->curr_slave_lock); | |
3036 | } | |
3037 | } else { | |
3038 | read_lock(&bond->curr_slave_lock); | |
3039 | ||
3040 | if ((slave != bond->curr_active_slave) && | |
3041 | (!bond->current_arp_slave) && | |
3042 | (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) && | |
c3ade5ca | 3043 | bond_has_ip(bond))) { |
1da177e4 LT |
3044 | /* a backup slave has gone down; three times |
3045 | * the delta allows the current slave to be | |
3046 | * taken out before the backup slave. | |
3047 | * note: a non-null current_arp_slave indicates | |
3048 | * the curr_active_slave went down and we are | |
3049 | * searching for a new one; under this | |
3050 | * condition we only take the curr_active_slave | |
3051 | * down - this gives each slave a chance to | |
3052 | * tx/rx traffic before being taken out | |
3053 | */ | |
3054 | ||
3055 | read_unlock(&bond->curr_slave_lock); | |
3056 | ||
3057 | slave->link = BOND_LINK_DOWN; | |
3058 | ||
3059 | if (slave->link_failure_count < UINT_MAX) { | |
3060 | slave->link_failure_count++; | |
3061 | } | |
3062 | ||
3063 | bond_set_slave_inactive_flags(slave); | |
3064 | ||
3065 | printk(KERN_INFO DRV_NAME | |
3066 | ": %s: backup interface %s is now down\n", | |
3067 | bond_dev->name, | |
3068 | slave->dev->name); | |
3069 | } else { | |
3070 | read_unlock(&bond->curr_slave_lock); | |
3071 | } | |
3072 | } | |
3073 | } | |
3074 | ||
3075 | read_lock(&bond->curr_slave_lock); | |
3076 | slave = bond->curr_active_slave; | |
3077 | read_unlock(&bond->curr_slave_lock); | |
3078 | ||
3079 | if (slave) { | |
3080 | /* if we have sent traffic in the past 2*arp_intervals but | |
3081 | * haven't xmit and rx traffic in that time interval, select | |
3082 | * a different slave. slave->jiffies is only updated when | |
3083 | * a slave first becomes the curr_active_slave - not necessarily | |
3084 | * after every arp; this ensures the slave has a full 2*delta | |
3085 | * before being taken out. if a primary is being used, check | |
3086 | * if it is up and needs to take over as the curr_active_slave | |
3087 | */ | |
3088 | if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
c3ade5ca JV |
3089 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && |
3090 | bond_has_ip(bond))) && | |
1da177e4 LT |
3091 | ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { |
3092 | ||
3093 | slave->link = BOND_LINK_DOWN; | |
3094 | ||
3095 | if (slave->link_failure_count < UINT_MAX) { | |
3096 | slave->link_failure_count++; | |
3097 | } | |
3098 | ||
3099 | printk(KERN_INFO DRV_NAME | |
3100 | ": %s: link status down for active interface " | |
3101 | "%s, disabling it\n", | |
3102 | bond_dev->name, | |
3103 | slave->dev->name); | |
3104 | ||
3105 | write_lock(&bond->curr_slave_lock); | |
3106 | ||
3107 | bond_select_active_slave(bond); | |
3108 | slave = bond->curr_active_slave; | |
3109 | ||
3110 | write_unlock(&bond->curr_slave_lock); | |
3111 | ||
3112 | bond->current_arp_slave = slave; | |
3113 | ||
3114 | if (slave) { | |
3115 | slave->jiffies = jiffies; | |
3116 | } | |
3117 | } else if ((bond->primary_slave) && | |
3118 | (bond->primary_slave != slave) && | |
3119 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3120 | /* at this point, slave is the curr_active_slave */ | |
3121 | printk(KERN_INFO DRV_NAME | |
3122 | ": %s: changing from interface %s to primary " | |
3123 | "interface %s\n", | |
3124 | bond_dev->name, | |
3125 | slave->dev->name, | |
3126 | bond->primary_slave->dev->name); | |
3127 | ||
3128 | /* primary is up so switch to it */ | |
3129 | write_lock(&bond->curr_slave_lock); | |
3130 | bond_change_active_slave(bond, bond->primary_slave); | |
3131 | write_unlock(&bond->curr_slave_lock); | |
3132 | ||
3133 | slave = bond->primary_slave; | |
3134 | slave->jiffies = jiffies; | |
3135 | } else { | |
3136 | bond->current_arp_slave = NULL; | |
3137 | } | |
3138 | ||
3139 | /* the current slave must tx an arp to ensure backup slaves | |
3140 | * rx traffic | |
3141 | */ | |
c3ade5ca | 3142 | if (slave && bond_has_ip(bond)) { |
1da177e4 LT |
3143 | bond_arp_send_all(bond, slave); |
3144 | } | |
3145 | } | |
3146 | ||
3147 | /* if we don't have a curr_active_slave, search for the next available | |
3148 | * backup slave from the current_arp_slave and make it the candidate | |
3149 | * for becoming the curr_active_slave | |
3150 | */ | |
3151 | if (!slave) { | |
3152 | if (!bond->current_arp_slave) { | |
3153 | bond->current_arp_slave = bond->first_slave; | |
3154 | } | |
3155 | ||
3156 | if (bond->current_arp_slave) { | |
3157 | bond_set_slave_inactive_flags(bond->current_arp_slave); | |
3158 | ||
3159 | /* search for next candidate */ | |
2f872f04 | 3160 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { |
1da177e4 LT |
3161 | if (IS_UP(slave->dev)) { |
3162 | slave->link = BOND_LINK_BACK; | |
3163 | bond_set_slave_active_flags(slave); | |
3164 | bond_arp_send_all(bond, slave); | |
3165 | slave->jiffies = jiffies; | |
3166 | bond->current_arp_slave = slave; | |
3167 | break; | |
3168 | } | |
3169 | ||
3170 | /* if the link state is up at this point, we | |
3171 | * mark it down - this can happen if we have | |
3172 | * simultaneous link failures and | |
3173 | * reselect_active_interface doesn't make this | |
3174 | * one the current slave so it is still marked | |
3175 | * up when it is actually down | |
3176 | */ | |
3177 | if (slave->link == BOND_LINK_UP) { | |
3178 | slave->link = BOND_LINK_DOWN; | |
3179 | if (slave->link_failure_count < UINT_MAX) { | |
3180 | slave->link_failure_count++; | |
3181 | } | |
3182 | ||
3183 | bond_set_slave_inactive_flags(slave); | |
3184 | ||
3185 | printk(KERN_INFO DRV_NAME | |
3186 | ": %s: backup interface %s is " | |
3187 | "now down.\n", | |
3188 | bond_dev->name, | |
3189 | slave->dev->name); | |
3190 | } | |
3191 | } | |
3192 | } | |
3193 | } | |
3194 | ||
3195 | re_arm: | |
3196 | if (bond->params.arp_interval) { | |
3197 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
3198 | } | |
3199 | out: | |
3200 | read_unlock(&bond->lock); | |
3201 | } | |
3202 | ||
3203 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3204 | ||
3205 | #ifdef CONFIG_PROC_FS | |
3206 | ||
3207 | #define SEQ_START_TOKEN ((void *)1) | |
3208 | ||
3209 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) | |
3210 | { | |
3211 | struct bonding *bond = seq->private; | |
3212 | loff_t off = 0; | |
3213 | struct slave *slave; | |
3214 | int i; | |
3215 | ||
3216 | /* make sure the bond won't be taken away */ | |
3217 | read_lock(&dev_base_lock); | |
3218 | read_lock_bh(&bond->lock); | |
3219 | ||
3220 | if (*pos == 0) { | |
3221 | return SEQ_START_TOKEN; | |
3222 | } | |
3223 | ||
3224 | bond_for_each_slave(bond, slave, i) { | |
3225 | if (++off == *pos) { | |
3226 | return slave; | |
3227 | } | |
3228 | } | |
3229 | ||
3230 | return NULL; | |
3231 | } | |
3232 | ||
3233 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3234 | { | |
3235 | struct bonding *bond = seq->private; | |
3236 | struct slave *slave = v; | |
3237 | ||
3238 | ++*pos; | |
3239 | if (v == SEQ_START_TOKEN) { | |
3240 | return bond->first_slave; | |
3241 | } | |
3242 | ||
3243 | slave = slave->next; | |
3244 | ||
3245 | return (slave == bond->first_slave) ? NULL : slave; | |
3246 | } | |
3247 | ||
3248 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
3249 | { | |
3250 | struct bonding *bond = seq->private; | |
3251 | ||
3252 | read_unlock_bh(&bond->lock); | |
3253 | read_unlock(&dev_base_lock); | |
3254 | } | |
3255 | ||
3256 | static void bond_info_show_master(struct seq_file *seq) | |
3257 | { | |
3258 | struct bonding *bond = seq->private; | |
3259 | struct slave *curr; | |
3260 | ||
3261 | read_lock(&bond->curr_slave_lock); | |
3262 | curr = bond->curr_active_slave; | |
3263 | read_unlock(&bond->curr_slave_lock); | |
3264 | ||
3265 | seq_printf(seq, "Bonding Mode: %s\n", | |
3266 | bond_mode_name(bond->params.mode)); | |
3267 | ||
c61b75ad MW |
3268 | if (bond->params.mode == BOND_MODE_XOR || |
3269 | bond->params.mode == BOND_MODE_8023AD) { | |
3270 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3271 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3272 | bond->params.xmit_policy); | |
3273 | } | |
3274 | ||
1da177e4 LT |
3275 | if (USES_PRIMARY(bond->params.mode)) { |
3276 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
3277 | (bond->primary_slave) ? |
3278 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
3279 | |
3280 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3281 | (curr) ? curr->dev->name : "None"); | |
3282 | } | |
3283 | ||
3284 | seq_printf(seq, "MII Status: %s\n", (curr) ? "up" : "down"); | |
3285 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); | |
3286 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3287 | bond->params.updelay * bond->params.miimon); | |
3288 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3289 | bond->params.downdelay * bond->params.miimon); | |
3290 | ||
3291 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3292 | struct ad_info ad_info; | |
3293 | ||
3294 | seq_puts(seq, "\n802.3ad info\n"); | |
3295 | seq_printf(seq, "LACP rate: %s\n", | |
3296 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
3297 | ||
3298 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3299 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3300 | bond->dev->name); | |
3301 | } else { | |
3302 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3303 | ||
3304 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3305 | ad_info.aggregator_id); | |
3306 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3307 | ad_info.ports); | |
3308 | seq_printf(seq, "\tActor Key: %d\n", | |
3309 | ad_info.actor_key); | |
3310 | seq_printf(seq, "\tPartner Key: %d\n", | |
3311 | ad_info.partner_key); | |
3312 | seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3313 | ad_info.partner_system[0], | |
3314 | ad_info.partner_system[1], | |
3315 | ad_info.partner_system[2], | |
3316 | ad_info.partner_system[3], | |
3317 | ad_info.partner_system[4], | |
3318 | ad_info.partner_system[5]); | |
3319 | } | |
3320 | } | |
3321 | } | |
3322 | ||
3323 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3324 | { | |
3325 | struct bonding *bond = seq->private; | |
3326 | ||
3327 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3328 | seq_printf(seq, "MII Status: %s\n", | |
3329 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
3330 | seq_printf(seq, "Link Failure Count: %d\n", | |
3331 | slave->link_failure_count); | |
3332 | ||
217df670 JV |
3333 | seq_printf(seq, |
3334 | "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3335 | slave->perm_hwaddr[0], slave->perm_hwaddr[1], | |
3336 | slave->perm_hwaddr[2], slave->perm_hwaddr[3], | |
3337 | slave->perm_hwaddr[4], slave->perm_hwaddr[5]); | |
1da177e4 LT |
3338 | |
3339 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3340 | const struct aggregator *agg | |
3341 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3342 | ||
3343 | if (agg) { | |
3344 | seq_printf(seq, "Aggregator ID: %d\n", | |
3345 | agg->aggregator_identifier); | |
3346 | } else { | |
3347 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3348 | } | |
3349 | } | |
3350 | } | |
3351 | ||
3352 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3353 | { | |
3354 | if (v == SEQ_START_TOKEN) { | |
3355 | seq_printf(seq, "%s\n", version); | |
3356 | bond_info_show_master(seq); | |
3357 | } else { | |
3358 | bond_info_show_slave(seq, v); | |
3359 | } | |
3360 | ||
3361 | return 0; | |
3362 | } | |
3363 | ||
3364 | static struct seq_operations bond_info_seq_ops = { | |
3365 | .start = bond_info_seq_start, | |
3366 | .next = bond_info_seq_next, | |
3367 | .stop = bond_info_seq_stop, | |
3368 | .show = bond_info_seq_show, | |
3369 | }; | |
3370 | ||
3371 | static int bond_info_open(struct inode *inode, struct file *file) | |
3372 | { | |
3373 | struct seq_file *seq; | |
3374 | struct proc_dir_entry *proc; | |
3375 | int res; | |
3376 | ||
3377 | res = seq_open(file, &bond_info_seq_ops); | |
3378 | if (!res) { | |
3379 | /* recover the pointer buried in proc_dir_entry data */ | |
3380 | seq = file->private_data; | |
3381 | proc = PDE(inode); | |
3382 | seq->private = proc->data; | |
3383 | } | |
3384 | ||
3385 | return res; | |
3386 | } | |
3387 | ||
3388 | static struct file_operations bond_info_fops = { | |
3389 | .owner = THIS_MODULE, | |
3390 | .open = bond_info_open, | |
3391 | .read = seq_read, | |
3392 | .llseek = seq_lseek, | |
3393 | .release = seq_release, | |
3394 | }; | |
3395 | ||
3396 | static int bond_create_proc_entry(struct bonding *bond) | |
3397 | { | |
3398 | struct net_device *bond_dev = bond->dev; | |
3399 | ||
3400 | if (bond_proc_dir) { | |
3401 | bond->proc_entry = create_proc_entry(bond_dev->name, | |
3402 | S_IRUGO, | |
3403 | bond_proc_dir); | |
3404 | if (bond->proc_entry == NULL) { | |
3405 | printk(KERN_WARNING DRV_NAME | |
3406 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3407 | DRV_NAME, bond_dev->name); | |
3408 | } else { | |
3409 | bond->proc_entry->data = bond; | |
3410 | bond->proc_entry->proc_fops = &bond_info_fops; | |
3411 | bond->proc_entry->owner = THIS_MODULE; | |
3412 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | return 0; | |
3417 | } | |
3418 | ||
3419 | static void bond_remove_proc_entry(struct bonding *bond) | |
3420 | { | |
3421 | if (bond_proc_dir && bond->proc_entry) { | |
3422 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3423 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3424 | bond->proc_entry = NULL; | |
3425 | } | |
3426 | } | |
3427 | ||
3428 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3429 | * Caller must hold rtnl_lock. | |
3430 | */ | |
3431 | static void bond_create_proc_dir(void) | |
3432 | { | |
3433 | int len = strlen(DRV_NAME); | |
3434 | ||
3435 | for (bond_proc_dir = proc_net->subdir; bond_proc_dir; | |
3436 | bond_proc_dir = bond_proc_dir->next) { | |
3437 | if ((bond_proc_dir->namelen == len) && | |
3438 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3439 | break; | |
3440 | } | |
3441 | } | |
3442 | ||
3443 | if (!bond_proc_dir) { | |
3444 | bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); | |
3445 | if (bond_proc_dir) { | |
3446 | bond_proc_dir->owner = THIS_MODULE; | |
3447 | } else { | |
3448 | printk(KERN_WARNING DRV_NAME | |
3449 | ": Warning: cannot create /proc/net/%s\n", | |
3450 | DRV_NAME); | |
3451 | } | |
3452 | } | |
3453 | } | |
3454 | ||
3455 | /* Destroy the bonding directory under /proc/net, if empty. | |
3456 | * Caller must hold rtnl_lock. | |
3457 | */ | |
3458 | static void bond_destroy_proc_dir(void) | |
3459 | { | |
3460 | struct proc_dir_entry *de; | |
3461 | ||
3462 | if (!bond_proc_dir) { | |
3463 | return; | |
3464 | } | |
3465 | ||
3466 | /* verify that the /proc dir is empty */ | |
3467 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3468 | /* ignore . and .. */ | |
3469 | if (*(de->name) != '.') { | |
3470 | break; | |
3471 | } | |
3472 | } | |
3473 | ||
3474 | if (de) { | |
3475 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3476 | bond_proc_dir->owner = NULL; | |
3477 | } | |
3478 | } else { | |
3479 | remove_proc_entry(DRV_NAME, proc_net); | |
3480 | bond_proc_dir = NULL; | |
3481 | } | |
3482 | } | |
3483 | #endif /* CONFIG_PROC_FS */ | |
3484 | ||
3485 | /*-------------------------- netdev event handling --------------------------*/ | |
3486 | ||
3487 | /* | |
3488 | * Change device name | |
3489 | */ | |
3490 | static int bond_event_changename(struct bonding *bond) | |
3491 | { | |
3492 | #ifdef CONFIG_PROC_FS | |
3493 | bond_remove_proc_entry(bond); | |
3494 | bond_create_proc_entry(bond); | |
3495 | #endif | |
3496 | ||
3497 | return NOTIFY_DONE; | |
3498 | } | |
3499 | ||
3500 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3501 | { | |
3502 | struct bonding *event_bond = bond_dev->priv; | |
3503 | ||
3504 | switch (event) { | |
3505 | case NETDEV_CHANGENAME: | |
3506 | return bond_event_changename(event_bond); | |
3507 | case NETDEV_UNREGISTER: | |
3508 | /* | |
3509 | * TODO: remove a bond from the list? | |
3510 | */ | |
3511 | break; | |
3512 | default: | |
3513 | break; | |
3514 | } | |
3515 | ||
3516 | return NOTIFY_DONE; | |
3517 | } | |
3518 | ||
3519 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3520 | { | |
3521 | struct net_device *bond_dev = slave_dev->master; | |
8531c5ff | 3522 | struct bonding *bond = bond_dev->priv; |
1da177e4 LT |
3523 | |
3524 | switch (event) { | |
3525 | case NETDEV_UNREGISTER: | |
3526 | if (bond_dev) { | |
3527 | bond_release(bond_dev, slave_dev); | |
3528 | } | |
3529 | break; | |
3530 | case NETDEV_CHANGE: | |
3531 | /* | |
3532 | * TODO: is this what we get if somebody | |
3533 | * sets up a hierarchical bond, then rmmod's | |
3534 | * one of the slave bonding devices? | |
3535 | */ | |
3536 | break; | |
3537 | case NETDEV_DOWN: | |
3538 | /* | |
3539 | * ... Or is it this? | |
3540 | */ | |
3541 | break; | |
3542 | case NETDEV_CHANGEMTU: | |
3543 | /* | |
3544 | * TODO: Should slaves be allowed to | |
3545 | * independently alter their MTU? For | |
3546 | * an active-backup bond, slaves need | |
3547 | * not be the same type of device, so | |
3548 | * MTUs may vary. For other modes, | |
3549 | * slaves arguably should have the | |
3550 | * same MTUs. To do this, we'd need to | |
3551 | * take over the slave's change_mtu | |
3552 | * function for the duration of their | |
3553 | * servitude. | |
3554 | */ | |
3555 | break; | |
3556 | case NETDEV_CHANGENAME: | |
3557 | /* | |
3558 | * TODO: handle changing the primary's name | |
3559 | */ | |
3560 | break; | |
8531c5ff AK |
3561 | case NETDEV_FEAT_CHANGE: |
3562 | bond_compute_features(bond); | |
3563 | break; | |
1da177e4 LT |
3564 | default: |
3565 | break; | |
3566 | } | |
3567 | ||
3568 | return NOTIFY_DONE; | |
3569 | } | |
3570 | ||
3571 | /* | |
3572 | * bond_netdev_event: handle netdev notifier chain events. | |
3573 | * | |
3574 | * This function receives events for the netdev chain. The caller (an | |
3575 | * ioctl handler calling notifier_call_chain) holds the necessary | |
3576 | * locks for us to safely manipulate the slave devices (RTNL lock, | |
3577 | * dev_probe_lock). | |
3578 | */ | |
3579 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3580 | { | |
3581 | struct net_device *event_dev = (struct net_device *)ptr; | |
3582 | ||
3583 | dprintk("event_dev: %s, event: %lx\n", | |
3584 | (event_dev ? event_dev->name : "None"), | |
3585 | event); | |
3586 | ||
3587 | if (event_dev->flags & IFF_MASTER) { | |
3588 | dprintk("IFF_MASTER\n"); | |
3589 | return bond_master_netdev_event(event, event_dev); | |
3590 | } | |
3591 | ||
3592 | if (event_dev->flags & IFF_SLAVE) { | |
3593 | dprintk("IFF_SLAVE\n"); | |
3594 | return bond_slave_netdev_event(event, event_dev); | |
3595 | } | |
3596 | ||
3597 | return NOTIFY_DONE; | |
3598 | } | |
3599 | ||
c3ade5ca JV |
3600 | /* |
3601 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3602 | * | |
3603 | * We keep track of device IPs primarily to use as source addresses in | |
3604 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3605 | * | |
3606 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3607 | */ | |
3608 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3609 | { | |
3610 | struct in_ifaddr *ifa = ptr; | |
3611 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
3612 | struct bonding *bond, *bond_next; | |
3613 | struct vlan_entry *vlan, *vlan_next; | |
3614 | ||
3615 | list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) { | |
3616 | if (bond->dev == event_dev) { | |
3617 | switch (event) { | |
3618 | case NETDEV_UP: | |
3619 | bond->master_ip = ifa->ifa_local; | |
3620 | return NOTIFY_OK; | |
3621 | case NETDEV_DOWN: | |
3622 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3623 | return NOTIFY_OK; | |
3624 | default: | |
3625 | return NOTIFY_DONE; | |
3626 | } | |
3627 | } | |
3628 | ||
3629 | if (list_empty(&bond->vlan_list)) | |
3630 | continue; | |
3631 | ||
3632 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
3633 | vlan_list) { | |
3634 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
3635 | if (vlan_dev == event_dev) { | |
3636 | switch (event) { | |
3637 | case NETDEV_UP: | |
3638 | vlan->vlan_ip = ifa->ifa_local; | |
3639 | return NOTIFY_OK; | |
3640 | case NETDEV_DOWN: | |
3641 | vlan->vlan_ip = | |
3642 | bond_glean_dev_ip(vlan_dev); | |
3643 | return NOTIFY_OK; | |
3644 | default: | |
3645 | return NOTIFY_DONE; | |
3646 | } | |
3647 | } | |
3648 | } | |
3649 | } | |
3650 | return NOTIFY_DONE; | |
3651 | } | |
3652 | ||
1da177e4 LT |
3653 | static struct notifier_block bond_netdev_notifier = { |
3654 | .notifier_call = bond_netdev_event, | |
3655 | }; | |
3656 | ||
c3ade5ca JV |
3657 | static struct notifier_block bond_inetaddr_notifier = { |
3658 | .notifier_call = bond_inetaddr_event, | |
3659 | }; | |
3660 | ||
1da177e4 LT |
3661 | /*-------------------------- Packet type handling ---------------------------*/ |
3662 | ||
3663 | /* register to receive lacpdus on a bond */ | |
3664 | static void bond_register_lacpdu(struct bonding *bond) | |
3665 | { | |
3666 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3667 | ||
3668 | /* initialize packet type */ | |
3669 | pk_type->type = PKT_TYPE_LACPDU; | |
3670 | pk_type->dev = bond->dev; | |
3671 | pk_type->func = bond_3ad_lacpdu_recv; | |
3672 | ||
3673 | dev_add_pack(pk_type); | |
3674 | } | |
3675 | ||
3676 | /* unregister to receive lacpdus on a bond */ | |
3677 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3678 | { | |
3679 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3680 | } | |
3681 | ||
169a3e66 JV |
3682 | /*---------------------------- Hashing Policies -----------------------------*/ |
3683 | ||
3684 | /* | |
3685 | * Hash for the the output device based upon layer 3 and layer 4 data. If | |
3686 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is | |
3687 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3688 | */ | |
3689 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3690 | struct net_device *bond_dev, int count) | |
3691 | { | |
3692 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3693 | struct iphdr *iph = skb->nh.iph; | |
3694 | u16 *layer4hdr = (u16 *)((u32 *)iph + iph->ihl); | |
3695 | int layer4_xor = 0; | |
3696 | ||
3697 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
3698 | if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) && | |
3699 | (iph->protocol == IPPROTO_TCP || | |
3700 | iph->protocol == IPPROTO_UDP)) { | |
3701 | layer4_xor = htons((*layer4hdr ^ *(layer4hdr + 1))); | |
3702 | } | |
3703 | return (layer4_xor ^ | |
3704 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3705 | ||
3706 | } | |
3707 | ||
3708 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3709 | } | |
3710 | ||
3711 | /* | |
3712 | * Hash for the output device based upon layer 2 data | |
3713 | */ | |
3714 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3715 | struct net_device *bond_dev, int count) | |
3716 | { | |
3717 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3718 | ||
3719 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3720 | } | |
3721 | ||
1da177e4 LT |
3722 | /*-------------------------- Device entry points ----------------------------*/ |
3723 | ||
3724 | static int bond_open(struct net_device *bond_dev) | |
3725 | { | |
3726 | struct bonding *bond = bond_dev->priv; | |
3727 | struct timer_list *mii_timer = &bond->mii_timer; | |
3728 | struct timer_list *arp_timer = &bond->arp_timer; | |
3729 | ||
3730 | bond->kill_timers = 0; | |
3731 | ||
3732 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3733 | (bond->params.mode == BOND_MODE_ALB)) { | |
3734 | struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); | |
3735 | ||
3736 | /* bond_alb_initialize must be called before the timer | |
3737 | * is started. | |
3738 | */ | |
3739 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3740 | /* something went wrong - fail the open operation */ | |
3741 | return -1; | |
3742 | } | |
3743 | ||
3744 | init_timer(alb_timer); | |
3745 | alb_timer->expires = jiffies + 1; | |
3746 | alb_timer->data = (unsigned long)bond; | |
3747 | alb_timer->function = (void *)&bond_alb_monitor; | |
3748 | add_timer(alb_timer); | |
3749 | } | |
3750 | ||
3751 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3752 | init_timer(mii_timer); | |
3753 | mii_timer->expires = jiffies + 1; | |
3754 | mii_timer->data = (unsigned long)bond_dev; | |
3755 | mii_timer->function = (void *)&bond_mii_monitor; | |
3756 | add_timer(mii_timer); | |
3757 | } | |
3758 | ||
3759 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3760 | init_timer(arp_timer); | |
3761 | arp_timer->expires = jiffies + 1; | |
3762 | arp_timer->data = (unsigned long)bond_dev; | |
3763 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3764 | arp_timer->function = (void *)&bond_activebackup_arp_mon; | |
3765 | } else { | |
3766 | arp_timer->function = (void *)&bond_loadbalance_arp_mon; | |
3767 | } | |
3768 | add_timer(arp_timer); | |
3769 | } | |
3770 | ||
3771 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3772 | struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); | |
3773 | init_timer(ad_timer); | |
3774 | ad_timer->expires = jiffies + 1; | |
3775 | ad_timer->data = (unsigned long)bond; | |
3776 | ad_timer->function = (void *)&bond_3ad_state_machine_handler; | |
3777 | add_timer(ad_timer); | |
3778 | ||
3779 | /* register to receive LACPDUs */ | |
3780 | bond_register_lacpdu(bond); | |
3781 | } | |
3782 | ||
3783 | return 0; | |
3784 | } | |
3785 | ||
3786 | static int bond_close(struct net_device *bond_dev) | |
3787 | { | |
3788 | struct bonding *bond = bond_dev->priv; | |
3789 | ||
3790 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3791 | /* Unregister the receive of LACPDUs */ | |
3792 | bond_unregister_lacpdu(bond); | |
3793 | } | |
3794 | ||
3795 | write_lock_bh(&bond->lock); | |
3796 | ||
3797 | bond_mc_list_destroy(bond); | |
3798 | ||
3799 | /* signal timers not to re-arm */ | |
3800 | bond->kill_timers = 1; | |
3801 | ||
3802 | write_unlock_bh(&bond->lock); | |
3803 | ||
3804 | /* del_timer_sync must run without holding the bond->lock | |
3805 | * because a running timer might be trying to hold it too | |
3806 | */ | |
3807 | ||
3808 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3809 | del_timer_sync(&bond->mii_timer); | |
3810 | } | |
3811 | ||
3812 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3813 | del_timer_sync(&bond->arp_timer); | |
3814 | } | |
3815 | ||
3816 | switch (bond->params.mode) { | |
3817 | case BOND_MODE_8023AD: | |
3818 | del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); | |
3819 | break; | |
3820 | case BOND_MODE_TLB: | |
3821 | case BOND_MODE_ALB: | |
3822 | del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); | |
3823 | break; | |
3824 | default: | |
3825 | break; | |
3826 | } | |
3827 | ||
3828 | /* Release the bonded slaves */ | |
3829 | bond_release_all(bond_dev); | |
3830 | ||
3831 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3832 | (bond->params.mode == BOND_MODE_ALB)) { | |
3833 | /* Must be called only after all | |
3834 | * slaves have been released | |
3835 | */ | |
3836 | bond_alb_deinitialize(bond); | |
3837 | } | |
3838 | ||
3839 | return 0; | |
3840 | } | |
3841 | ||
3842 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3843 | { | |
3844 | struct bonding *bond = bond_dev->priv; | |
3845 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
3846 | struct slave *slave; | |
3847 | int i; | |
3848 | ||
3849 | memset(stats, 0, sizeof(struct net_device_stats)); | |
3850 | ||
3851 | read_lock_bh(&bond->lock); | |
3852 | ||
3853 | bond_for_each_slave(bond, slave, i) { | |
3854 | sstats = slave->dev->get_stats(slave->dev); | |
3855 | ||
3856 | stats->rx_packets += sstats->rx_packets; | |
3857 | stats->rx_bytes += sstats->rx_bytes; | |
3858 | stats->rx_errors += sstats->rx_errors; | |
3859 | stats->rx_dropped += sstats->rx_dropped; | |
3860 | ||
3861 | stats->tx_packets += sstats->tx_packets; | |
3862 | stats->tx_bytes += sstats->tx_bytes; | |
3863 | stats->tx_errors += sstats->tx_errors; | |
3864 | stats->tx_dropped += sstats->tx_dropped; | |
3865 | ||
3866 | stats->multicast += sstats->multicast; | |
3867 | stats->collisions += sstats->collisions; | |
3868 | ||
3869 | stats->rx_length_errors += sstats->rx_length_errors; | |
3870 | stats->rx_over_errors += sstats->rx_over_errors; | |
3871 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3872 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3873 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3874 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3875 | ||
3876 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3877 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3878 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3879 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3880 | stats->tx_window_errors += sstats->tx_window_errors; | |
3881 | } | |
3882 | ||
3883 | read_unlock_bh(&bond->lock); | |
3884 | ||
3885 | return stats; | |
3886 | } | |
3887 | ||
3888 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3889 | { | |
3890 | struct net_device *slave_dev = NULL; | |
3891 | struct ifbond k_binfo; | |
3892 | struct ifbond __user *u_binfo = NULL; | |
3893 | struct ifslave k_sinfo; | |
3894 | struct ifslave __user *u_sinfo = NULL; | |
3895 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3896 | int res = 0; |
3897 | ||
3898 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3899 | bond_dev->name, cmd); | |
3900 | ||
3901 | switch (cmd) { | |
1da177e4 LT |
3902 | case SIOCGMIIPHY: |
3903 | mii = if_mii(ifr); | |
3904 | if (!mii) { | |
3905 | return -EINVAL; | |
3906 | } | |
3907 | mii->phy_id = 0; | |
3908 | /* Fall Through */ | |
3909 | case SIOCGMIIREG: | |
3910 | /* | |
3911 | * We do this again just in case we were called by SIOCGMIIREG | |
3912 | * instead of SIOCGMIIPHY. | |
3913 | */ | |
3914 | mii = if_mii(ifr); | |
3915 | if (!mii) { | |
3916 | return -EINVAL; | |
3917 | } | |
3918 | ||
3919 | if (mii->reg_num == 1) { | |
3920 | struct bonding *bond = bond_dev->priv; | |
3921 | mii->val_out = 0; | |
3922 | read_lock_bh(&bond->lock); | |
3923 | read_lock(&bond->curr_slave_lock); | |
3924 | if (bond->curr_active_slave) { | |
3925 | mii->val_out = BMSR_LSTATUS; | |
3926 | } | |
3927 | read_unlock(&bond->curr_slave_lock); | |
3928 | read_unlock_bh(&bond->lock); | |
3929 | } | |
3930 | ||
3931 | return 0; | |
3932 | case BOND_INFO_QUERY_OLD: | |
3933 | case SIOCBONDINFOQUERY: | |
3934 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3935 | ||
3936 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3937 | return -EFAULT; | |
3938 | } | |
3939 | ||
3940 | res = bond_info_query(bond_dev, &k_binfo); | |
3941 | if (res == 0) { | |
3942 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3943 | return -EFAULT; | |
3944 | } | |
3945 | } | |
3946 | ||
3947 | return res; | |
3948 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3949 | case SIOCBONDSLAVEINFOQUERY: | |
3950 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3951 | ||
3952 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3953 | return -EFAULT; | |
3954 | } | |
3955 | ||
3956 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3957 | if (res == 0) { | |
3958 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
3959 | return -EFAULT; | |
3960 | } | |
3961 | } | |
3962 | ||
3963 | return res; | |
3964 | default: | |
3965 | /* Go on */ | |
3966 | break; | |
3967 | } | |
3968 | ||
3969 | if (!capable(CAP_NET_ADMIN)) { | |
3970 | return -EPERM; | |
3971 | } | |
3972 | ||
1da177e4 LT |
3973 | slave_dev = dev_get_by_name(ifr->ifr_slave); |
3974 | ||
3975 | dprintk("slave_dev=%p: \n", slave_dev); | |
3976 | ||
3977 | if (!slave_dev) { | |
3978 | res = -ENODEV; | |
3979 | } else { | |
3980 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
3981 | switch (cmd) { | |
3982 | case BOND_ENSLAVE_OLD: | |
3983 | case SIOCBONDENSLAVE: | |
3984 | res = bond_enslave(bond_dev, slave_dev); | |
3985 | break; | |
3986 | case BOND_RELEASE_OLD: | |
3987 | case SIOCBONDRELEASE: | |
3988 | res = bond_release(bond_dev, slave_dev); | |
3989 | break; | |
3990 | case BOND_SETHWADDR_OLD: | |
3991 | case SIOCBONDSETHWADDR: | |
3992 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3993 | break; | |
3994 | case BOND_CHANGE_ACTIVE_OLD: | |
3995 | case SIOCBONDCHANGEACTIVE: | |
3996 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3997 | break; | |
3998 | default: | |
3999 | res = -EOPNOTSUPP; | |
4000 | } | |
4001 | ||
4002 | dev_put(slave_dev); | |
4003 | } | |
4004 | ||
1da177e4 LT |
4005 | return res; |
4006 | } | |
4007 | ||
4008 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
4009 | { | |
4010 | struct bonding *bond = bond_dev->priv; | |
4011 | struct dev_mc_list *dmi; | |
4012 | ||
4013 | write_lock_bh(&bond->lock); | |
4014 | ||
4015 | /* | |
4016 | * Do promisc before checking multicast_mode | |
4017 | */ | |
4018 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
4019 | bond_set_promiscuity(bond, 1); | |
4020 | } | |
4021 | ||
4022 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
4023 | bond_set_promiscuity(bond, -1); | |
4024 | } | |
4025 | ||
4026 | /* set allmulti flag to slaves */ | |
4027 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
4028 | bond_set_allmulti(bond, 1); | |
4029 | } | |
4030 | ||
4031 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
4032 | bond_set_allmulti(bond, -1); | |
4033 | } | |
4034 | ||
4035 | bond->flags = bond_dev->flags; | |
4036 | ||
4037 | /* looking for addresses to add to slaves' mc list */ | |
4038 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
4039 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
4040 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4041 | } | |
4042 | } | |
4043 | ||
4044 | /* looking for addresses to delete from slaves' list */ | |
4045 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
4046 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
4047 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4048 | } | |
4049 | } | |
4050 | ||
4051 | /* save master's multicast list */ | |
4052 | bond_mc_list_destroy(bond); | |
4053 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
4054 | ||
4055 | write_unlock_bh(&bond->lock); | |
4056 | } | |
4057 | ||
4058 | /* | |
4059 | * Change the MTU of all of a master's slaves to match the master | |
4060 | */ | |
4061 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4062 | { | |
4063 | struct bonding *bond = bond_dev->priv; | |
4064 | struct slave *slave, *stop_at; | |
4065 | int res = 0; | |
4066 | int i; | |
4067 | ||
4068 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
4069 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
4070 | ||
4071 | /* Can't hold bond->lock with bh disabled here since | |
4072 | * some base drivers panic. On the other hand we can't | |
4073 | * hold bond->lock without bh disabled because we'll | |
4074 | * deadlock. The only solution is to rely on the fact | |
4075 | * that we're under rtnl_lock here, and the slaves | |
4076 | * list won't change. This doesn't solve the problem | |
4077 | * of setting the slave's MTU while it is | |
4078 | * transmitting, but the assumption is that the base | |
4079 | * driver can handle that. | |
4080 | * | |
4081 | * TODO: figure out a way to safely iterate the slaves | |
4082 | * list, but without holding a lock around the actual | |
4083 | * call to the base driver. | |
4084 | */ | |
4085 | ||
4086 | bond_for_each_slave(bond, slave, i) { | |
4087 | dprintk("s %p s->p %p c_m %p\n", slave, | |
4088 | slave->prev, slave->dev->change_mtu); | |
4089 | res = dev_set_mtu(slave->dev, new_mtu); | |
4090 | ||
4091 | if (res) { | |
4092 | /* If we failed to set the slave's mtu to the new value | |
4093 | * we must abort the operation even in ACTIVE_BACKUP | |
4094 | * mode, because if we allow the backup slaves to have | |
4095 | * different mtu values than the active slave we'll | |
4096 | * need to change their mtu when doing a failover. That | |
4097 | * means changing their mtu from timer context, which | |
4098 | * is probably not a good idea. | |
4099 | */ | |
4100 | dprintk("err %d %s\n", res, slave->dev->name); | |
4101 | goto unwind; | |
4102 | } | |
4103 | } | |
4104 | ||
4105 | bond_dev->mtu = new_mtu; | |
4106 | ||
4107 | return 0; | |
4108 | ||
4109 | unwind: | |
4110 | /* unwind from head to the slave that failed */ | |
4111 | stop_at = slave; | |
4112 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4113 | int tmp_res; | |
4114 | ||
4115 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4116 | if (tmp_res) { | |
4117 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4118 | slave->dev->name); | |
4119 | } | |
4120 | } | |
4121 | ||
4122 | return res; | |
4123 | } | |
4124 | ||
4125 | /* | |
4126 | * Change HW address | |
4127 | * | |
4128 | * Note that many devices must be down to change the HW address, and | |
4129 | * downing the master releases all slaves. We can make bonds full of | |
4130 | * bonding devices to test this, however. | |
4131 | */ | |
4132 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4133 | { | |
4134 | struct bonding *bond = bond_dev->priv; | |
4135 | struct sockaddr *sa = addr, tmp_sa; | |
4136 | struct slave *slave, *stop_at; | |
4137 | int res = 0; | |
4138 | int i; | |
4139 | ||
4140 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
4141 | ||
4142 | if (!is_valid_ether_addr(sa->sa_data)) { | |
4143 | return -EADDRNOTAVAIL; | |
4144 | } | |
4145 | ||
4146 | /* Can't hold bond->lock with bh disabled here since | |
4147 | * some base drivers panic. On the other hand we can't | |
4148 | * hold bond->lock without bh disabled because we'll | |
4149 | * deadlock. The only solution is to rely on the fact | |
4150 | * that we're under rtnl_lock here, and the slaves | |
4151 | * list won't change. This doesn't solve the problem | |
4152 | * of setting the slave's hw address while it is | |
4153 | * transmitting, but the assumption is that the base | |
4154 | * driver can handle that. | |
4155 | * | |
4156 | * TODO: figure out a way to safely iterate the slaves | |
4157 | * list, but without holding a lock around the actual | |
4158 | * call to the base driver. | |
4159 | */ | |
4160 | ||
4161 | bond_for_each_slave(bond, slave, i) { | |
4162 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
4163 | ||
4164 | if (slave->dev->set_mac_address == NULL) { | |
4165 | res = -EOPNOTSUPP; | |
4166 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
4167 | goto unwind; | |
4168 | } | |
4169 | ||
4170 | res = dev_set_mac_address(slave->dev, addr); | |
4171 | if (res) { | |
4172 | /* TODO: consider downing the slave | |
4173 | * and retry ? | |
4174 | * User should expect communications | |
4175 | * breakage anyway until ARP finish | |
4176 | * updating, so... | |
4177 | */ | |
4178 | dprintk("err %d %s\n", res, slave->dev->name); | |
4179 | goto unwind; | |
4180 | } | |
4181 | } | |
4182 | ||
4183 | /* success */ | |
4184 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4185 | return 0; | |
4186 | ||
4187 | unwind: | |
4188 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4189 | tmp_sa.sa_family = bond_dev->type; | |
4190 | ||
4191 | /* unwind from head to the slave that failed */ | |
4192 | stop_at = slave; | |
4193 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4194 | int tmp_res; | |
4195 | ||
4196 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4197 | if (tmp_res) { | |
4198 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4199 | slave->dev->name); | |
4200 | } | |
4201 | } | |
4202 | ||
4203 | return res; | |
4204 | } | |
4205 | ||
4206 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4207 | { | |
4208 | struct bonding *bond = bond_dev->priv; | |
4209 | struct slave *slave, *start_at; | |
4210 | int i; | |
4211 | int res = 1; | |
4212 | ||
4213 | read_lock(&bond->lock); | |
4214 | ||
4215 | if (!BOND_IS_OK(bond)) { | |
4216 | goto out; | |
4217 | } | |
4218 | ||
4219 | read_lock(&bond->curr_slave_lock); | |
4220 | slave = start_at = bond->curr_active_slave; | |
4221 | read_unlock(&bond->curr_slave_lock); | |
4222 | ||
4223 | if (!slave) { | |
4224 | goto out; | |
4225 | } | |
4226 | ||
4227 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4228 | if (IS_UP(slave->dev) && | |
4229 | (slave->link == BOND_LINK_UP) && | |
4230 | (slave->state == BOND_STATE_ACTIVE)) { | |
4231 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4232 | ||
4233 | write_lock(&bond->curr_slave_lock); | |
4234 | bond->curr_active_slave = slave->next; | |
4235 | write_unlock(&bond->curr_slave_lock); | |
4236 | ||
4237 | break; | |
4238 | } | |
4239 | } | |
4240 | ||
4241 | ||
4242 | out: | |
4243 | if (res) { | |
4244 | /* no suitable interface, frame not sent */ | |
4245 | dev_kfree_skb(skb); | |
4246 | } | |
4247 | read_unlock(&bond->lock); | |
4248 | return 0; | |
4249 | } | |
4250 | ||
075897ce | 4251 | static void bond_activebackup_xmit_copy(struct sk_buff *skb, |
df49898a JL |
4252 | struct bonding *bond, |
4253 | struct slave *slave) | |
075897ce JL |
4254 | { |
4255 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
4256 | struct ethhdr *eth_data; | |
4257 | u8 *hwaddr; | |
4258 | int res; | |
4259 | ||
4260 | if (!skb2) { | |
4261 | printk(KERN_ERR DRV_NAME ": Error: " | |
4262 | "bond_activebackup_xmit_copy(): skb_copy() failed\n"); | |
4263 | return; | |
4264 | } | |
4265 | ||
4266 | skb2->mac.raw = (unsigned char *)skb2->data; | |
4267 | eth_data = eth_hdr(skb2); | |
4268 | ||
df49898a JL |
4269 | /* Pick an appropriate source MAC address |
4270 | * -- use slave's perm MAC addr, unless used by bond | |
4271 | * -- otherwise, borrow active slave's perm MAC addr | |
4272 | * since that will not be used | |
4273 | */ | |
075897ce JL |
4274 | hwaddr = slave->perm_hwaddr; |
4275 | if (!memcmp(eth_data->h_source, hwaddr, ETH_ALEN)) | |
4276 | hwaddr = bond->curr_active_slave->perm_hwaddr; | |
4277 | ||
4278 | /* Set source MAC address appropriately */ | |
4279 | memcpy(eth_data->h_source, hwaddr, ETH_ALEN); | |
4280 | ||
4281 | res = bond_dev_queue_xmit(bond, skb2, slave->dev); | |
4282 | if (res) | |
4283 | dev_kfree_skb(skb2); | |
4284 | ||
4285 | return; | |
4286 | } | |
4287 | ||
1da177e4 LT |
4288 | /* |
4289 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4290 | * the bond has a usable interface. | |
4291 | */ | |
4292 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4293 | { | |
4294 | struct bonding *bond = bond_dev->priv; | |
4295 | int res = 1; | |
4296 | ||
1da177e4 LT |
4297 | read_lock(&bond->lock); |
4298 | read_lock(&bond->curr_slave_lock); | |
4299 | ||
4300 | if (!BOND_IS_OK(bond)) { | |
4301 | goto out; | |
4302 | } | |
4303 | ||
075897ce JL |
4304 | if (!bond->curr_active_slave) |
4305 | goto out; | |
4306 | ||
4307 | /* Xmit IGMP frames on all slaves to ensure rapid fail-over | |
4308 | for multicast traffic on snooping switches */ | |
4309 | if (skb->protocol == __constant_htons(ETH_P_IP) && | |
4310 | skb->nh.iph->protocol == IPPROTO_IGMP) { | |
4311 | struct slave *slave, *active_slave; | |
4312 | int i; | |
4313 | ||
4314 | active_slave = bond->curr_active_slave; | |
4315 | bond_for_each_slave_from_to(bond, slave, i, active_slave->next, | |
4316 | active_slave->prev) | |
4317 | if (IS_UP(slave->dev) && | |
4318 | (slave->link == BOND_LINK_UP)) | |
4319 | bond_activebackup_xmit_copy(skb, bond, slave); | |
1da177e4 LT |
4320 | } |
4321 | ||
075897ce JL |
4322 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4323 | ||
1da177e4 LT |
4324 | out: |
4325 | if (res) { | |
4326 | /* no suitable interface, frame not sent */ | |
4327 | dev_kfree_skb(skb); | |
4328 | } | |
4329 | read_unlock(&bond->curr_slave_lock); | |
4330 | read_unlock(&bond->lock); | |
4331 | return 0; | |
4332 | } | |
4333 | ||
4334 | /* | |
169a3e66 JV |
4335 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4336 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4337 | * find the next active slave. | |
1da177e4 LT |
4338 | */ |
4339 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4340 | { | |
4341 | struct bonding *bond = bond_dev->priv; | |
1da177e4 LT |
4342 | struct slave *slave, *start_at; |
4343 | int slave_no; | |
4344 | int i; | |
4345 | int res = 1; | |
4346 | ||
4347 | read_lock(&bond->lock); | |
4348 | ||
4349 | if (!BOND_IS_OK(bond)) { | |
4350 | goto out; | |
4351 | } | |
4352 | ||
169a3e66 | 4353 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
4354 | |
4355 | bond_for_each_slave(bond, slave, i) { | |
4356 | slave_no--; | |
4357 | if (slave_no < 0) { | |
4358 | break; | |
4359 | } | |
4360 | } | |
4361 | ||
4362 | start_at = slave; | |
4363 | ||
4364 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4365 | if (IS_UP(slave->dev) && | |
4366 | (slave->link == BOND_LINK_UP) && | |
4367 | (slave->state == BOND_STATE_ACTIVE)) { | |
4368 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4369 | break; | |
4370 | } | |
4371 | } | |
4372 | ||
4373 | out: | |
4374 | if (res) { | |
4375 | /* no suitable interface, frame not sent */ | |
4376 | dev_kfree_skb(skb); | |
4377 | } | |
4378 | read_unlock(&bond->lock); | |
4379 | return 0; | |
4380 | } | |
4381 | ||
4382 | /* | |
4383 | * in broadcast mode, we send everything to all usable interfaces. | |
4384 | */ | |
4385 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4386 | { | |
4387 | struct bonding *bond = bond_dev->priv; | |
4388 | struct slave *slave, *start_at; | |
4389 | struct net_device *tx_dev = NULL; | |
4390 | int i; | |
4391 | int res = 1; | |
4392 | ||
4393 | read_lock(&bond->lock); | |
4394 | ||
4395 | if (!BOND_IS_OK(bond)) { | |
4396 | goto out; | |
4397 | } | |
4398 | ||
4399 | read_lock(&bond->curr_slave_lock); | |
4400 | start_at = bond->curr_active_slave; | |
4401 | read_unlock(&bond->curr_slave_lock); | |
4402 | ||
4403 | if (!start_at) { | |
4404 | goto out; | |
4405 | } | |
4406 | ||
4407 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4408 | if (IS_UP(slave->dev) && | |
4409 | (slave->link == BOND_LINK_UP) && | |
4410 | (slave->state == BOND_STATE_ACTIVE)) { | |
4411 | if (tx_dev) { | |
4412 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4413 | if (!skb2) { | |
4414 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4415 | ": %s: Error: bond_xmit_broadcast(): " |
4416 | "skb_clone() failed\n", | |
4417 | bond_dev->name); | |
1da177e4 LT |
4418 | continue; |
4419 | } | |
4420 | ||
4421 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4422 | if (res) { | |
4423 | dev_kfree_skb(skb2); | |
4424 | continue; | |
4425 | } | |
4426 | } | |
4427 | tx_dev = slave->dev; | |
4428 | } | |
4429 | } | |
4430 | ||
4431 | if (tx_dev) { | |
4432 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4433 | } | |
4434 | ||
4435 | out: | |
4436 | if (res) { | |
4437 | /* no suitable interface, frame not sent */ | |
4438 | dev_kfree_skb(skb); | |
4439 | } | |
4440 | /* frame sent to all suitable interfaces */ | |
4441 | read_unlock(&bond->lock); | |
4442 | return 0; | |
4443 | } | |
4444 | ||
4445 | /*------------------------- Device initialization ---------------------------*/ | |
4446 | ||
4447 | /* | |
4448 | * set bond mode specific net device operations | |
4449 | */ | |
a77b5325 | 4450 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4451 | { |
169a3e66 JV |
4452 | struct net_device *bond_dev = bond->dev; |
4453 | ||
1da177e4 LT |
4454 | switch (mode) { |
4455 | case BOND_MODE_ROUNDROBIN: | |
4456 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4457 | break; | |
4458 | case BOND_MODE_ACTIVEBACKUP: | |
4459 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4460 | break; | |
4461 | case BOND_MODE_XOR: | |
4462 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
169a3e66 JV |
4463 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4464 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4465 | else | |
4466 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 LT |
4467 | break; |
4468 | case BOND_MODE_BROADCAST: | |
4469 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4470 | break; | |
4471 | case BOND_MODE_8023AD: | |
4472 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; | |
169a3e66 JV |
4473 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4474 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4475 | else | |
4476 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 LT |
4477 | break; |
4478 | case BOND_MODE_TLB: | |
4479 | case BOND_MODE_ALB: | |
4480 | bond_dev->hard_start_xmit = bond_alb_xmit; | |
4481 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4482 | break; | |
4483 | default: | |
4484 | /* Should never happen, mode already checked */ | |
4485 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4486 | ": %s: Error: Unknown bonding mode %d\n", |
4487 | bond_dev->name, | |
1da177e4 LT |
4488 | mode); |
4489 | break; | |
4490 | } | |
4491 | } | |
4492 | ||
217df670 JV |
4493 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4494 | struct ethtool_drvinfo *drvinfo) | |
4495 | { | |
4496 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4497 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4498 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4499 | } | |
4500 | ||
8531c5ff AK |
4501 | static struct ethtool_ops bond_ethtool_ops = { |
4502 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4503 | .get_sg = ethtool_op_get_sg, | |
217df670 | 4504 | .get_drvinfo = bond_ethtool_get_drvinfo, |
8531c5ff AK |
4505 | }; |
4506 | ||
1da177e4 LT |
4507 | /* |
4508 | * Does not allocate but creates a /proc entry. | |
4509 | * Allowed to fail. | |
4510 | */ | |
4511 | static int __init bond_init(struct net_device *bond_dev, struct bond_params *params) | |
4512 | { | |
4513 | struct bonding *bond = bond_dev->priv; | |
4514 | ||
4515 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4516 | ||
4517 | /* initialize rwlocks */ | |
4518 | rwlock_init(&bond->lock); | |
4519 | rwlock_init(&bond->curr_slave_lock); | |
4520 | ||
4521 | bond->params = *params; /* copy params struct */ | |
4522 | ||
4523 | /* Initialize pointers */ | |
4524 | bond->first_slave = NULL; | |
4525 | bond->curr_active_slave = NULL; | |
4526 | bond->current_arp_slave = NULL; | |
4527 | bond->primary_slave = NULL; | |
4528 | bond->dev = bond_dev; | |
4529 | INIT_LIST_HEAD(&bond->vlan_list); | |
4530 | ||
4531 | /* Initialize the device entry points */ | |
4532 | bond_dev->open = bond_open; | |
4533 | bond_dev->stop = bond_close; | |
4534 | bond_dev->get_stats = bond_get_stats; | |
4535 | bond_dev->do_ioctl = bond_do_ioctl; | |
8531c5ff | 4536 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 LT |
4537 | bond_dev->set_multicast_list = bond_set_multicast_list; |
4538 | bond_dev->change_mtu = bond_change_mtu; | |
4539 | bond_dev->set_mac_address = bond_set_mac_address; | |
4540 | ||
169a3e66 | 4541 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 LT |
4542 | |
4543 | bond_dev->destructor = free_netdev; | |
4544 | ||
4545 | /* Initialize the device options */ | |
4546 | bond_dev->tx_queue_len = 0; | |
4547 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
4548 | ||
4549 | /* At first, we block adding VLANs. That's the only way to | |
4550 | * prevent problems that occur when adding VLANs over an | |
4551 | * empty bond. The block will be removed once non-challenged | |
4552 | * slaves are enslaved. | |
4553 | */ | |
4554 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4555 | ||
4556 | /* don't acquire bond device's xmit_lock when | |
4557 | * transmitting */ | |
4558 | bond_dev->features |= NETIF_F_LLTX; | |
4559 | ||
4560 | /* By default, we declare the bond to be fully | |
4561 | * VLAN hardware accelerated capable. Special | |
4562 | * care is taken in the various xmit functions | |
4563 | * when there are slaves that are not hw accel | |
4564 | * capable | |
4565 | */ | |
4566 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4567 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4568 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4569 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4570 | NETIF_F_HW_VLAN_RX | | |
4571 | NETIF_F_HW_VLAN_FILTER); | |
4572 | ||
4573 | #ifdef CONFIG_PROC_FS | |
4574 | bond_create_proc_entry(bond); | |
4575 | #endif | |
4576 | ||
4577 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
4578 | ||
4579 | return 0; | |
4580 | } | |
4581 | ||
4582 | /* De-initialize device specific data. | |
4583 | * Caller must hold rtnl_lock. | |
4584 | */ | |
a77b5325 | 4585 | void bond_deinit(struct net_device *bond_dev) |
1da177e4 LT |
4586 | { |
4587 | struct bonding *bond = bond_dev->priv; | |
4588 | ||
4589 | list_del(&bond->bond_list); | |
4590 | ||
4591 | #ifdef CONFIG_PROC_FS | |
4592 | bond_remove_proc_entry(bond); | |
4593 | #endif | |
4594 | } | |
4595 | ||
4596 | /* Unregister and free all bond devices. | |
4597 | * Caller must hold rtnl_lock. | |
4598 | */ | |
4599 | static void bond_free_all(void) | |
4600 | { | |
4601 | struct bonding *bond, *nxt; | |
4602 | ||
4603 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4604 | struct net_device *bond_dev = bond->dev; | |
4605 | ||
4606 | unregister_netdevice(bond_dev); | |
4607 | bond_deinit(bond_dev); | |
4608 | } | |
4609 | ||
4610 | #ifdef CONFIG_PROC_FS | |
4611 | bond_destroy_proc_dir(); | |
4612 | #endif | |
4613 | } | |
4614 | ||
4615 | /*------------------------- Module initialization ---------------------------*/ | |
4616 | ||
4617 | /* | |
4618 | * Convert string input module parms. Accept either the | |
4619 | * number of the mode or its string name. | |
4620 | */ | |
a77b5325 | 4621 | int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) |
1da177e4 LT |
4622 | { |
4623 | int i; | |
4624 | ||
4625 | for (i = 0; tbl[i].modename; i++) { | |
4626 | if ((isdigit(*mode_arg) && | |
4627 | tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || | |
4628 | (strncmp(mode_arg, tbl[i].modename, | |
4629 | strlen(tbl[i].modename)) == 0)) { | |
4630 | return tbl[i].mode; | |
4631 | } | |
4632 | } | |
4633 | ||
4634 | return -1; | |
4635 | } | |
4636 | ||
4637 | static int bond_check_params(struct bond_params *params) | |
4638 | { | |
4639 | /* | |
4640 | * Convert string parameters. | |
4641 | */ | |
4642 | if (mode) { | |
4643 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4644 | if (bond_mode == -1) { | |
4645 | printk(KERN_ERR DRV_NAME | |
4646 | ": Error: Invalid bonding mode \"%s\"\n", | |
4647 | mode == NULL ? "NULL" : mode); | |
4648 | return -EINVAL; | |
4649 | } | |
4650 | } | |
4651 | ||
169a3e66 JV |
4652 | if (xmit_hash_policy) { |
4653 | if ((bond_mode != BOND_MODE_XOR) && | |
4654 | (bond_mode != BOND_MODE_8023AD)) { | |
4655 | printk(KERN_INFO DRV_NAME | |
4656 | ": xor_mode param is irrelevant in mode %s\n", | |
4657 | bond_mode_name(bond_mode)); | |
4658 | } else { | |
4659 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4660 | xmit_hashtype_tbl); | |
4661 | if (xmit_hashtype == -1) { | |
4662 | printk(KERN_ERR DRV_NAME | |
4663 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4664 | xmit_hash_policy == NULL ? "NULL" : | |
4665 | xmit_hash_policy); | |
4666 | return -EINVAL; | |
4667 | } | |
4668 | } | |
4669 | } | |
4670 | ||
1da177e4 LT |
4671 | if (lacp_rate) { |
4672 | if (bond_mode != BOND_MODE_8023AD) { | |
4673 | printk(KERN_INFO DRV_NAME | |
4674 | ": lacp_rate param is irrelevant in mode %s\n", | |
4675 | bond_mode_name(bond_mode)); | |
4676 | } else { | |
4677 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4678 | if (lacp_fast == -1) { | |
4679 | printk(KERN_ERR DRV_NAME | |
4680 | ": Error: Invalid lacp rate \"%s\"\n", | |
4681 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4682 | return -EINVAL; | |
4683 | } | |
4684 | } | |
4685 | } | |
4686 | ||
4687 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4688 | printk(KERN_WARNING DRV_NAME | |
4689 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4e0952c7 | 4690 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
1da177e4 LT |
4691 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
4692 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4693 | } | |
4694 | ||
4695 | if (miimon < 0) { | |
4696 | printk(KERN_WARNING DRV_NAME | |
4697 | ": Warning: miimon module parameter (%d), " | |
4698 | "not in range 0-%d, so it was reset to %d\n", | |
4699 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4700 | miimon = BOND_LINK_MON_INTERV; | |
4701 | } | |
4702 | ||
4703 | if (updelay < 0) { | |
4704 | printk(KERN_WARNING DRV_NAME | |
4705 | ": Warning: updelay module parameter (%d), " | |
4706 | "not in range 0-%d, so it was reset to 0\n", | |
4707 | updelay, INT_MAX); | |
4708 | updelay = 0; | |
4709 | } | |
4710 | ||
4711 | if (downdelay < 0) { | |
4712 | printk(KERN_WARNING DRV_NAME | |
4713 | ": Warning: downdelay module parameter (%d), " | |
4714 | "not in range 0-%d, so it was reset to 0\n", | |
4715 | downdelay, INT_MAX); | |
4716 | downdelay = 0; | |
4717 | } | |
4718 | ||
4719 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4720 | printk(KERN_WARNING DRV_NAME | |
4721 | ": Warning: use_carrier module parameter (%d), " | |
4722 | "not of valid value (0/1), so it was set to 1\n", | |
4723 | use_carrier); | |
4724 | use_carrier = 1; | |
4725 | } | |
4726 | ||
4727 | /* reset values for 802.3ad */ | |
4728 | if (bond_mode == BOND_MODE_8023AD) { | |
4729 | if (!miimon) { | |
4730 | printk(KERN_WARNING DRV_NAME | |
4731 | ": Warning: miimon must be specified, " | |
4732 | "otherwise bonding will not detect link " | |
4733 | "failure, speed and duplex which are " | |
4734 | "essential for 802.3ad operation\n"); | |
4735 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4736 | miimon = 100; | |
4737 | } | |
4738 | } | |
4739 | ||
4740 | /* reset values for TLB/ALB */ | |
4741 | if ((bond_mode == BOND_MODE_TLB) || | |
4742 | (bond_mode == BOND_MODE_ALB)) { | |
4743 | if (!miimon) { | |
4744 | printk(KERN_WARNING DRV_NAME | |
4745 | ": Warning: miimon must be specified, " | |
4746 | "otherwise bonding will not detect link " | |
4747 | "failure and link speed which are essential " | |
4748 | "for TLB/ALB load balancing\n"); | |
4749 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4750 | miimon = 100; | |
4751 | } | |
4752 | } | |
4753 | ||
4754 | if (bond_mode == BOND_MODE_ALB) { | |
4755 | printk(KERN_NOTICE DRV_NAME | |
4756 | ": In ALB mode you might experience client " | |
4757 | "disconnections upon reconnection of a link if the " | |
4758 | "bonding module updelay parameter (%d msec) is " | |
4759 | "incompatible with the forwarding delay time of the " | |
4760 | "switch\n", | |
4761 | updelay); | |
4762 | } | |
4763 | ||
4764 | if (!miimon) { | |
4765 | if (updelay || downdelay) { | |
4766 | /* just warn the user the up/down delay will have | |
4767 | * no effect since miimon is zero... | |
4768 | */ | |
4769 | printk(KERN_WARNING DRV_NAME | |
4770 | ": Warning: miimon module parameter not set " | |
4771 | "and updelay (%d) or downdelay (%d) module " | |
4772 | "parameter is set; updelay and downdelay have " | |
4773 | "no effect unless miimon is set\n", | |
4774 | updelay, downdelay); | |
4775 | } | |
4776 | } else { | |
4777 | /* don't allow arp monitoring */ | |
4778 | if (arp_interval) { | |
4779 | printk(KERN_WARNING DRV_NAME | |
4780 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4781 | "can't be used simultaneously, disabling ARP " | |
4782 | "monitoring\n", | |
4783 | miimon, arp_interval); | |
4784 | arp_interval = 0; | |
4785 | } | |
4786 | ||
4787 | if ((updelay % miimon) != 0) { | |
4788 | printk(KERN_WARNING DRV_NAME | |
4789 | ": Warning: updelay (%d) is not a multiple " | |
4790 | "of miimon (%d), updelay rounded to %d ms\n", | |
4791 | updelay, miimon, (updelay / miimon) * miimon); | |
4792 | } | |
4793 | ||
4794 | updelay /= miimon; | |
4795 | ||
4796 | if ((downdelay % miimon) != 0) { | |
4797 | printk(KERN_WARNING DRV_NAME | |
4798 | ": Warning: downdelay (%d) is not a multiple " | |
4799 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4800 | downdelay, miimon, | |
4801 | (downdelay / miimon) * miimon); | |
4802 | } | |
4803 | ||
4804 | downdelay /= miimon; | |
4805 | } | |
4806 | ||
4807 | if (arp_interval < 0) { | |
4808 | printk(KERN_WARNING DRV_NAME | |
4809 | ": Warning: arp_interval module parameter (%d) " | |
4810 | ", not in range 0-%d, so it was reset to %d\n", | |
4811 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4812 | arp_interval = BOND_LINK_ARP_INTERV; | |
4813 | } | |
4814 | ||
4815 | for (arp_ip_count = 0; | |
4816 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4817 | arp_ip_count++) { | |
4818 | /* not complete check, but should be good enough to | |
4819 | catch mistakes */ | |
4820 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4821 | printk(KERN_WARNING DRV_NAME | |
4822 | ": Warning: bad arp_ip_target module parameter " | |
4823 | "(%s), ARP monitoring will not be performed\n", | |
4824 | arp_ip_target[arp_ip_count]); | |
4825 | arp_interval = 0; | |
4826 | } else { | |
4827 | u32 ip = in_aton(arp_ip_target[arp_ip_count]); | |
4828 | arp_target[arp_ip_count] = ip; | |
4829 | } | |
4830 | } | |
4831 | ||
4832 | if (arp_interval && !arp_ip_count) { | |
4833 | /* don't allow arping if no arp_ip_target given... */ | |
4834 | printk(KERN_WARNING DRV_NAME | |
4835 | ": Warning: arp_interval module parameter (%d) " | |
4836 | "specified without providing an arp_ip_target " | |
4837 | "parameter, arp_interval was reset to 0\n", | |
4838 | arp_interval); | |
4839 | arp_interval = 0; | |
4840 | } | |
4841 | ||
4842 | if (miimon) { | |
4843 | printk(KERN_INFO DRV_NAME | |
4844 | ": MII link monitoring set to %d ms\n", | |
4845 | miimon); | |
4846 | } else if (arp_interval) { | |
4847 | int i; | |
4848 | ||
4849 | printk(KERN_INFO DRV_NAME | |
4850 | ": ARP monitoring set to %d ms with %d target(s):", | |
4851 | arp_interval, arp_ip_count); | |
4852 | ||
4853 | for (i = 0; i < arp_ip_count; i++) | |
4854 | printk (" %s", arp_ip_target[i]); | |
4855 | ||
4856 | printk("\n"); | |
4857 | ||
4858 | } else { | |
4859 | /* miimon and arp_interval not set, we need one so things | |
4860 | * work as expected, see bonding.txt for details | |
4861 | */ | |
4862 | printk(KERN_WARNING DRV_NAME | |
4863 | ": Warning: either miimon or arp_interval and " | |
4864 | "arp_ip_target module parameters must be specified, " | |
4865 | "otherwise bonding will not detect link failures! see " | |
4866 | "bonding.txt for details.\n"); | |
4867 | } | |
4868 | ||
4869 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4870 | /* currently, using a primary only makes sense | |
4871 | * in active backup, TLB or ALB modes | |
4872 | */ | |
4873 | printk(KERN_WARNING DRV_NAME | |
4874 | ": Warning: %s primary device specified but has no " | |
4875 | "effect in %s mode\n", | |
4876 | primary, bond_mode_name(bond_mode)); | |
4877 | primary = NULL; | |
4878 | } | |
4879 | ||
4880 | /* fill params struct with the proper values */ | |
4881 | params->mode = bond_mode; | |
169a3e66 | 4882 | params->xmit_policy = xmit_hashtype; |
1da177e4 LT |
4883 | params->miimon = miimon; |
4884 | params->arp_interval = arp_interval; | |
4885 | params->updelay = updelay; | |
4886 | params->downdelay = downdelay; | |
4887 | params->use_carrier = use_carrier; | |
4888 | params->lacp_fast = lacp_fast; | |
4889 | params->primary[0] = 0; | |
4890 | ||
4891 | if (primary) { | |
4892 | strncpy(params->primary, primary, IFNAMSIZ); | |
4893 | params->primary[IFNAMSIZ - 1] = 0; | |
4894 | } | |
4895 | ||
4896 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4897 | ||
4898 | return 0; | |
4899 | } | |
4900 | ||
dfe60397 MW |
4901 | /* Create a new bond based on the specified name and bonding parameters. |
4902 | * Caller must NOT hold rtnl_lock; we need to release it here before we | |
4903 | * set up our sysfs entries. | |
4904 | */ | |
4905 | int bond_create(char *name, struct bond_params *params, struct bonding **newbond) | |
4906 | { | |
4907 | struct net_device *bond_dev; | |
4908 | int res; | |
4909 | ||
4910 | rtnl_lock(); | |
4911 | bond_dev = alloc_netdev(sizeof(struct bonding), name, ether_setup); | |
4912 | if (!bond_dev) { | |
4913 | printk(KERN_ERR DRV_NAME | |
4914 | ": %s: eek! can't alloc netdev!\n", | |
4915 | name); | |
4916 | res = -ENOMEM; | |
4917 | goto out_rtnl; | |
4918 | } | |
4919 | ||
4920 | /* bond_init() must be called after dev_alloc_name() (for the | |
4921 | * /proc files), but before register_netdevice(), because we | |
4922 | * need to set function pointers. | |
4923 | */ | |
4924 | ||
4925 | res = bond_init(bond_dev, params); | |
4926 | if (res < 0) { | |
4927 | goto out_netdev; | |
4928 | } | |
4929 | ||
4930 | SET_MODULE_OWNER(bond_dev); | |
4931 | ||
4932 | res = register_netdevice(bond_dev); | |
4933 | if (res < 0) { | |
4934 | goto out_bond; | |
4935 | } | |
4936 | if (newbond) | |
4937 | *newbond = bond_dev->priv; | |
4938 | ||
4939 | rtnl_unlock(); /* allows sysfs registration of net device */ | |
4940 | goto done; | |
4941 | out_bond: | |
4942 | bond_deinit(bond_dev); | |
4943 | out_netdev: | |
4944 | free_netdev(bond_dev); | |
4945 | out_rtnl: | |
4946 | rtnl_unlock(); | |
4947 | done: | |
4948 | return res; | |
4949 | } | |
4950 | ||
1da177e4 LT |
4951 | static int __init bonding_init(void) |
4952 | { | |
1da177e4 LT |
4953 | int i; |
4954 | int res; | |
dfe60397 | 4955 | char new_bond_name[8]; /* Enough room for 999 bonds at init. */ |
1da177e4 LT |
4956 | |
4957 | printk(KERN_INFO "%s", version); | |
4958 | ||
dfe60397 | 4959 | res = bond_check_params(&bonding_defaults); |
1da177e4 | 4960 | if (res) { |
dfe60397 | 4961 | goto out; |
1da177e4 LT |
4962 | } |
4963 | ||
1da177e4 LT |
4964 | #ifdef CONFIG_PROC_FS |
4965 | bond_create_proc_dir(); | |
4966 | #endif | |
1da177e4 | 4967 | for (i = 0; i < max_bonds; i++) { |
dfe60397 MW |
4968 | sprintf(new_bond_name, "bond%d",i); |
4969 | res = bond_create(new_bond_name,&bonding_defaults, NULL); | |
4970 | if (res) | |
4971 | goto err; | |
1da177e4 LT |
4972 | } |
4973 | ||
1da177e4 | 4974 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4975 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4976 | |
dfe60397 MW |
4977 | goto out; |
4978 | err: | |
40abc270 | 4979 | rtnl_lock(); |
1da177e4 | 4980 | bond_free_all(); |
1da177e4 | 4981 | rtnl_unlock(); |
dfe60397 | 4982 | out: |
1da177e4 | 4983 | return res; |
dfe60397 | 4984 | |
1da177e4 LT |
4985 | } |
4986 | ||
4987 | static void __exit bonding_exit(void) | |
4988 | { | |
4989 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4990 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 LT |
4991 | |
4992 | rtnl_lock(); | |
4993 | bond_free_all(); | |
4994 | rtnl_unlock(); | |
4995 | } | |
4996 | ||
4997 | module_init(bonding_init); | |
4998 | module_exit(bonding_exit); | |
4999 | MODULE_LICENSE("GPL"); | |
5000 | MODULE_VERSION(DRV_VERSION); | |
5001 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5002 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
5003 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
5004 | ||
5005 | /* | |
5006 | * Local variables: | |
5007 | * c-indent-level: 8 | |
5008 | * c-basic-offset: 8 | |
5009 | * tab-width: 8 | |
5010 | * End: | |
5011 | */ | |
5012 |