]>
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. | |
1da177e4 LT |
482 | */ |
483 | ||
484 | //#define BONDING_DEBUG 1 | |
485 | ||
486 | #include <linux/config.h> | |
487 | #include <linux/kernel.h> | |
488 | #include <linux/module.h> | |
489 | #include <linux/sched.h> | |
490 | #include <linux/types.h> | |
491 | #include <linux/fcntl.h> | |
492 | #include <linux/interrupt.h> | |
493 | #include <linux/ptrace.h> | |
494 | #include <linux/ioport.h> | |
495 | #include <linux/in.h> | |
496 | #include <linux/ip.h> | |
497 | #include <linux/slab.h> | |
498 | #include <linux/string.h> | |
499 | #include <linux/init.h> | |
500 | #include <linux/timer.h> | |
501 | #include <linux/socket.h> | |
502 | #include <linux/ctype.h> | |
503 | #include <linux/inet.h> | |
504 | #include <linux/bitops.h> | |
505 | #include <asm/system.h> | |
506 | #include <asm/io.h> | |
507 | #include <asm/dma.h> | |
508 | #include <asm/uaccess.h> | |
509 | #include <linux/errno.h> | |
510 | #include <linux/netdevice.h> | |
511 | #include <linux/inetdevice.h> | |
512 | #include <linux/etherdevice.h> | |
513 | #include <linux/skbuff.h> | |
514 | #include <net/sock.h> | |
515 | #include <linux/rtnetlink.h> | |
516 | #include <linux/proc_fs.h> | |
517 | #include <linux/seq_file.h> | |
518 | #include <linux/smp.h> | |
519 | #include <linux/if_ether.h> | |
520 | #include <net/arp.h> | |
521 | #include <linux/mii.h> | |
522 | #include <linux/ethtool.h> | |
523 | #include <linux/if_vlan.h> | |
524 | #include <linux/if_bonding.h> | |
c3ade5ca | 525 | #include <net/route.h> |
1da177e4 LT |
526 | #include "bonding.h" |
527 | #include "bond_3ad.h" | |
528 | #include "bond_alb.h" | |
529 | ||
530 | /*---------------------------- Module parameters ----------------------------*/ | |
531 | ||
532 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
533 | #define BOND_LINK_MON_INTERV 0 | |
534 | #define BOND_LINK_ARP_INTERV 0 | |
535 | ||
536 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
537 | static int miimon = BOND_LINK_MON_INTERV; | |
538 | static int updelay = 0; | |
539 | static int downdelay = 0; | |
540 | static int use_carrier = 1; | |
541 | static char *mode = NULL; | |
542 | static char *primary = NULL; | |
543 | static char *lacp_rate = NULL; | |
544 | static int arp_interval = BOND_LINK_ARP_INTERV; | |
545 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
546 | ||
547 | module_param(max_bonds, int, 0); | |
548 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
549 | module_param(miimon, int, 0); | |
550 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
551 | module_param(updelay, int, 0); | |
552 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
553 | module_param(downdelay, int, 0); | |
554 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, in milliseconds"); | |
555 | module_param(use_carrier, int, 0); | |
556 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default)"); | |
557 | module_param(mode, charp, 0); | |
558 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for active-backup, 2 for xor"); | |
559 | module_param(primary, charp, 0); | |
560 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
561 | module_param(lacp_rate, charp, 0); | |
562 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner (slow/fast)"); | |
563 | module_param(arp_interval, int, 0); | |
564 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
565 | module_param_array(arp_ip_target, charp, NULL, 0); | |
566 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
567 | ||
568 | /*----------------------------- Global variables ----------------------------*/ | |
569 | ||
570 | static const char *version = | |
571 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; | |
572 | ||
573 | static LIST_HEAD(bond_dev_list); | |
574 | ||
575 | #ifdef CONFIG_PROC_FS | |
576 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
577 | #endif | |
578 | ||
579 | static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; | |
580 | static int arp_ip_count = 0; | |
1da177e4 LT |
581 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
582 | static int lacp_fast = 0; | |
583 | static int app_abi_ver = 0; | |
584 | static int orig_app_abi_ver = -1; /* This is used to save the first ABI version | |
585 | * we receive from the application. Once set, | |
586 | * it won't be changed, and the module will | |
587 | * refuse to enslave/release interfaces if the | |
588 | * command comes from an application using | |
589 | * another ABI version. | |
590 | */ | |
591 | ||
592 | struct bond_parm_tbl { | |
593 | char *modename; | |
594 | int mode; | |
595 | }; | |
596 | ||
597 | static struct bond_parm_tbl bond_lacp_tbl[] = { | |
598 | { "slow", AD_LACP_SLOW}, | |
599 | { "fast", AD_LACP_FAST}, | |
600 | { NULL, -1}, | |
601 | }; | |
602 | ||
603 | static struct bond_parm_tbl bond_mode_tbl[] = { | |
604 | { "balance-rr", BOND_MODE_ROUNDROBIN}, | |
605 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
606 | { "balance-xor", BOND_MODE_XOR}, | |
607 | { "broadcast", BOND_MODE_BROADCAST}, | |
608 | { "802.3ad", BOND_MODE_8023AD}, | |
609 | { "balance-tlb", BOND_MODE_TLB}, | |
610 | { "balance-alb", BOND_MODE_ALB}, | |
611 | { NULL, -1}, | |
612 | }; | |
613 | ||
614 | /*-------------------------- Forward declarations ---------------------------*/ | |
615 | ||
616 | static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode); | |
c3ade5ca | 617 | static void bond_send_gratuitous_arp(struct bonding *bond); |
1da177e4 LT |
618 | |
619 | /*---------------------------- General routines -----------------------------*/ | |
620 | ||
621 | static const char *bond_mode_name(int mode) | |
622 | { | |
623 | switch (mode) { | |
624 | case BOND_MODE_ROUNDROBIN : | |
625 | return "load balancing (round-robin)"; | |
626 | case BOND_MODE_ACTIVEBACKUP : | |
627 | return "fault-tolerance (active-backup)"; | |
628 | case BOND_MODE_XOR : | |
629 | return "load balancing (xor)"; | |
630 | case BOND_MODE_BROADCAST : | |
631 | return "fault-tolerance (broadcast)"; | |
632 | case BOND_MODE_8023AD: | |
633 | return "IEEE 802.3ad Dynamic link aggregation"; | |
634 | case BOND_MODE_TLB: | |
635 | return "transmit load balancing"; | |
636 | case BOND_MODE_ALB: | |
637 | return "adaptive load balancing"; | |
638 | default: | |
639 | return "unknown"; | |
640 | } | |
641 | } | |
642 | ||
643 | /*---------------------------------- VLAN -----------------------------------*/ | |
644 | ||
645 | /** | |
646 | * bond_add_vlan - add a new vlan id on bond | |
647 | * @bond: bond that got the notification | |
648 | * @vlan_id: the vlan id to add | |
649 | * | |
650 | * Returns -ENOMEM if allocation failed. | |
651 | */ | |
652 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
653 | { | |
654 | struct vlan_entry *vlan; | |
655 | ||
656 | dprintk("bond: %s, vlan id %d\n", | |
657 | (bond ? bond->dev->name: "None"), vlan_id); | |
658 | ||
659 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
660 | if (!vlan) { | |
661 | return -ENOMEM; | |
662 | } | |
663 | ||
664 | INIT_LIST_HEAD(&vlan->vlan_list); | |
665 | vlan->vlan_id = vlan_id; | |
c3ade5ca | 666 | vlan->vlan_ip = 0; |
1da177e4 LT |
667 | |
668 | write_lock_bh(&bond->lock); | |
669 | ||
670 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
671 | ||
672 | write_unlock_bh(&bond->lock); | |
673 | ||
674 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | /** | |
680 | * bond_del_vlan - delete a vlan id from bond | |
681 | * @bond: bond that got the notification | |
682 | * @vlan_id: the vlan id to delete | |
683 | * | |
684 | * returns -ENODEV if @vlan_id was not found in @bond. | |
685 | */ | |
686 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
687 | { | |
688 | struct vlan_entry *vlan, *next; | |
689 | int res = -ENODEV; | |
690 | ||
691 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
692 | ||
693 | write_lock_bh(&bond->lock); | |
694 | ||
695 | list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { | |
696 | if (vlan->vlan_id == vlan_id) { | |
697 | list_del(&vlan->vlan_list); | |
698 | ||
699 | if ((bond->params.mode == BOND_MODE_TLB) || | |
700 | (bond->params.mode == BOND_MODE_ALB)) { | |
701 | bond_alb_clear_vlan(bond, vlan_id); | |
702 | } | |
703 | ||
704 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
705 | bond->dev->name); | |
706 | ||
707 | kfree(vlan); | |
708 | ||
709 | if (list_empty(&bond->vlan_list) && | |
710 | (bond->slave_cnt == 0)) { | |
711 | /* Last VLAN removed and no slaves, so | |
712 | * restore block on adding VLANs. This will | |
713 | * be removed once new slaves that are not | |
714 | * VLAN challenged will be added. | |
715 | */ | |
716 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
717 | } | |
718 | ||
719 | res = 0; | |
720 | goto out; | |
721 | } | |
722 | } | |
723 | ||
724 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
725 | bond->dev->name); | |
726 | ||
727 | out: | |
728 | write_unlock_bh(&bond->lock); | |
729 | return res; | |
730 | } | |
731 | ||
732 | /** | |
733 | * bond_has_challenged_slaves | |
734 | * @bond: the bond we're working on | |
735 | * | |
736 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
737 | * was found, 0 otherwise. | |
738 | * | |
739 | * Assumes bond->lock is held. | |
740 | */ | |
741 | static int bond_has_challenged_slaves(struct bonding *bond) | |
742 | { | |
743 | struct slave *slave; | |
744 | int i; | |
745 | ||
746 | bond_for_each_slave(bond, slave, i) { | |
747 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
748 | dprintk("found VLAN challenged slave - %s\n", | |
749 | slave->dev->name); | |
750 | return 1; | |
751 | } | |
752 | } | |
753 | ||
754 | dprintk("no VLAN challenged slaves found\n"); | |
755 | return 0; | |
756 | } | |
757 | ||
758 | /** | |
759 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
760 | * @bond: the bond we're working on | |
761 | * @curr: item we're advancing from | |
762 | * | |
763 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
764 | * or @curr->next otherwise (even if it is @curr itself again). | |
765 | * | |
766 | * Caller must hold bond->lock | |
767 | */ | |
768 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
769 | { | |
770 | struct vlan_entry *next, *last; | |
771 | ||
772 | if (list_empty(&bond->vlan_list)) { | |
773 | return NULL; | |
774 | } | |
775 | ||
776 | if (!curr) { | |
777 | next = list_entry(bond->vlan_list.next, | |
778 | struct vlan_entry, vlan_list); | |
779 | } else { | |
780 | last = list_entry(bond->vlan_list.prev, | |
781 | struct vlan_entry, vlan_list); | |
782 | if (last == curr) { | |
783 | next = list_entry(bond->vlan_list.next, | |
784 | struct vlan_entry, vlan_list); | |
785 | } else { | |
786 | next = list_entry(curr->vlan_list.next, | |
787 | struct vlan_entry, vlan_list); | |
788 | } | |
789 | } | |
790 | ||
791 | return next; | |
792 | } | |
793 | ||
794 | /** | |
795 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
796 | * | |
797 | * @bond: bond device that got this skb for tx. | |
798 | * @skb: hw accel VLAN tagged skb to transmit | |
799 | * @slave_dev: slave that is supposed to xmit this skbuff | |
800 | * | |
801 | * When the bond gets an skb to transmit that is | |
802 | * already hardware accelerated VLAN tagged, and it | |
803 | * needs to relay this skb to a slave that is not | |
804 | * hw accel capable, the skb needs to be "unaccelerated", | |
805 | * i.e. strip the hwaccel tag and re-insert it as part | |
806 | * of the payload. | |
807 | */ | |
808 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
809 | { | |
810 | unsigned short vlan_id; | |
811 | ||
812 | if (!list_empty(&bond->vlan_list) && | |
813 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
814 | vlan_get_tag(skb, &vlan_id) == 0) { | |
815 | skb->dev = slave_dev; | |
816 | skb = vlan_put_tag(skb, vlan_id); | |
817 | if (!skb) { | |
818 | /* vlan_put_tag() frees the skb in case of error, | |
819 | * so return success here so the calling functions | |
820 | * won't attempt to free is again. | |
821 | */ | |
822 | return 0; | |
823 | } | |
824 | } else { | |
825 | skb->dev = slave_dev; | |
826 | } | |
827 | ||
828 | skb->priority = 1; | |
829 | dev_queue_xmit(skb); | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
834 | /* | |
835 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
836 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
837 | * lock because: | |
838 | * a. This operation is performed in IOCTL context, | |
839 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
840 | * c. Holding a lock with BH disabled while directly calling a base driver | |
841 | * entry point is generally a BAD idea. | |
842 | * | |
843 | * The design of synchronization/protection for this operation in the 8021q | |
844 | * module is good for one or more VLAN devices over a single physical device | |
845 | * and cannot be extended for a teaming solution like bonding, so there is a | |
846 | * potential race condition here where a net device from the vlan group might | |
847 | * be referenced (either by a base driver or the 8021q code) while it is being | |
848 | * removed from the system. However, it turns out we're not making matters | |
849 | * worse, and if it works for regular VLAN usage it will work here too. | |
850 | */ | |
851 | ||
852 | /** | |
853 | * bond_vlan_rx_register - Propagates registration to slaves | |
854 | * @bond_dev: bonding net device that got called | |
855 | * @grp: vlan group being registered | |
856 | */ | |
857 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
858 | { | |
859 | struct bonding *bond = bond_dev->priv; | |
860 | struct slave *slave; | |
861 | int i; | |
862 | ||
863 | bond->vlgrp = grp; | |
864 | ||
865 | bond_for_each_slave(bond, slave, i) { | |
866 | struct net_device *slave_dev = slave->dev; | |
867 | ||
868 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
869 | slave_dev->vlan_rx_register) { | |
870 | slave_dev->vlan_rx_register(slave_dev, grp); | |
871 | } | |
872 | } | |
873 | } | |
874 | ||
875 | /** | |
876 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
877 | * @bond_dev: bonding net device that got called | |
878 | * @vid: vlan id being added | |
879 | */ | |
880 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
881 | { | |
882 | struct bonding *bond = bond_dev->priv; | |
883 | struct slave *slave; | |
884 | int i, res; | |
885 | ||
886 | bond_for_each_slave(bond, slave, i) { | |
887 | struct net_device *slave_dev = slave->dev; | |
888 | ||
889 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
890 | slave_dev->vlan_rx_add_vid) { | |
891 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
892 | } | |
893 | } | |
894 | ||
895 | res = bond_add_vlan(bond, vid); | |
896 | if (res) { | |
897 | printk(KERN_ERR DRV_NAME | |
898 | ": %s: Failed to add vlan id %d\n", | |
899 | bond_dev->name, vid); | |
900 | } | |
901 | } | |
902 | ||
903 | /** | |
904 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
905 | * @bond_dev: bonding net device that got called | |
906 | * @vid: vlan id being removed | |
907 | */ | |
908 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
909 | { | |
910 | struct bonding *bond = bond_dev->priv; | |
911 | struct slave *slave; | |
912 | struct net_device *vlan_dev; | |
913 | int i, res; | |
914 | ||
915 | bond_for_each_slave(bond, slave, i) { | |
916 | struct net_device *slave_dev = slave->dev; | |
917 | ||
918 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
919 | slave_dev->vlan_rx_kill_vid) { | |
920 | /* Save and then restore vlan_dev in the grp array, | |
921 | * since the slave's driver might clear it. | |
922 | */ | |
923 | vlan_dev = bond->vlgrp->vlan_devices[vid]; | |
924 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); | |
925 | bond->vlgrp->vlan_devices[vid] = vlan_dev; | |
926 | } | |
927 | } | |
928 | ||
929 | res = bond_del_vlan(bond, vid); | |
930 | if (res) { | |
931 | printk(KERN_ERR DRV_NAME | |
932 | ": %s: Failed to remove vlan id %d\n", | |
933 | bond_dev->name, vid); | |
934 | } | |
935 | } | |
936 | ||
937 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
938 | { | |
939 | struct vlan_entry *vlan; | |
940 | ||
941 | write_lock_bh(&bond->lock); | |
942 | ||
943 | if (list_empty(&bond->vlan_list)) { | |
944 | goto out; | |
945 | } | |
946 | ||
947 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
948 | slave_dev->vlan_rx_register) { | |
949 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
950 | } | |
951 | ||
952 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
953 | !(slave_dev->vlan_rx_add_vid)) { | |
954 | goto out; | |
955 | } | |
956 | ||
957 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
958 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
959 | } | |
960 | ||
961 | out: | |
962 | write_unlock_bh(&bond->lock); | |
963 | } | |
964 | ||
965 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
966 | { | |
967 | struct vlan_entry *vlan; | |
968 | struct net_device *vlan_dev; | |
969 | ||
970 | write_lock_bh(&bond->lock); | |
971 | ||
972 | if (list_empty(&bond->vlan_list)) { | |
973 | goto out; | |
974 | } | |
975 | ||
976 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
977 | !(slave_dev->vlan_rx_kill_vid)) { | |
978 | goto unreg; | |
979 | } | |
980 | ||
981 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
982 | /* Save and then restore vlan_dev in the grp array, | |
983 | * since the slave's driver might clear it. | |
984 | */ | |
985 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
986 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); | |
987 | bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; | |
988 | } | |
989 | ||
990 | unreg: | |
991 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
992 | slave_dev->vlan_rx_register) { | |
993 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
994 | } | |
995 | ||
996 | out: | |
997 | write_unlock_bh(&bond->lock); | |
998 | } | |
999 | ||
1000 | /*------------------------------- Link status -------------------------------*/ | |
1001 | ||
1002 | /* | |
1003 | * Get link speed and duplex from the slave's base driver | |
1004 | * using ethtool. If for some reason the call fails or the | |
1005 | * values are invalid, fake speed and duplex to 100/Full | |
1006 | * and return error. | |
1007 | */ | |
1008 | static int bond_update_speed_duplex(struct slave *slave) | |
1009 | { | |
1010 | struct net_device *slave_dev = slave->dev; | |
1011 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1012 | struct ifreq ifr; | |
1013 | struct ethtool_cmd etool; | |
1014 | ||
1015 | /* Fake speed and duplex */ | |
1016 | slave->speed = SPEED_100; | |
1017 | slave->duplex = DUPLEX_FULL; | |
1018 | ||
1019 | if (slave_dev->ethtool_ops) { | |
1020 | u32 res; | |
1021 | ||
1022 | if (!slave_dev->ethtool_ops->get_settings) { | |
1023 | return -1; | |
1024 | } | |
1025 | ||
1026 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); | |
1027 | if (res < 0) { | |
1028 | return -1; | |
1029 | } | |
1030 | ||
1031 | goto verify; | |
1032 | } | |
1033 | ||
1034 | ioctl = slave_dev->do_ioctl; | |
1035 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1036 | etool.cmd = ETHTOOL_GSET; | |
1037 | ifr.ifr_data = (char*)&etool; | |
1038 | if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { | |
1039 | return -1; | |
1040 | } | |
1041 | ||
1042 | verify: | |
1043 | switch (etool.speed) { | |
1044 | case SPEED_10: | |
1045 | case SPEED_100: | |
1046 | case SPEED_1000: | |
1047 | break; | |
1048 | default: | |
1049 | return -1; | |
1050 | } | |
1051 | ||
1052 | switch (etool.duplex) { | |
1053 | case DUPLEX_FULL: | |
1054 | case DUPLEX_HALF: | |
1055 | break; | |
1056 | default: | |
1057 | return -1; | |
1058 | } | |
1059 | ||
1060 | slave->speed = etool.speed; | |
1061 | slave->duplex = etool.duplex; | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * if <dev> supports MII link status reporting, check its link status. | |
1068 | * | |
1069 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
1070 | * depening upon the setting of the use_carrier parameter. | |
1071 | * | |
1072 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
1073 | * can't tell and just pretend it is), or 0, meaning that the link is | |
1074 | * down. | |
1075 | * | |
1076 | * If reporting is non-zero, instead of faking link up, return -1 if | |
1077 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
1078 | * support them). If use_carrier is set, return whatever it says. | |
1079 | * It'd be nice if there was a good way to tell if a driver supports | |
1080 | * netif_carrier, but there really isn't. | |
1081 | */ | |
1082 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
1083 | { | |
1084 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1085 | struct ifreq ifr; | |
1086 | struct mii_ioctl_data *mii; | |
1087 | struct ethtool_value etool; | |
1088 | ||
1089 | if (bond->params.use_carrier) { | |
1090 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
1091 | } | |
1092 | ||
1093 | ioctl = slave_dev->do_ioctl; | |
1094 | if (ioctl) { | |
1095 | /* TODO: set pointer to correct ioctl on a per team member */ | |
1096 | /* bases to make this more efficient. that is, once */ | |
1097 | /* we determine the correct ioctl, we will always */ | |
1098 | /* call it and not the others for that team */ | |
1099 | /* member. */ | |
1100 | ||
1101 | /* | |
1102 | * We cannot assume that SIOCGMIIPHY will also read a | |
1103 | * register; not all network drivers (e.g., e100) | |
1104 | * support that. | |
1105 | */ | |
1106 | ||
1107 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
1108 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1109 | mii = if_mii(&ifr); | |
1110 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
1111 | mii->reg_num = MII_BMSR; | |
1112 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
1113 | return (mii->val_out & BMSR_LSTATUS); | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ | |
1119 | /* for a period of time so we attempt to get link status */ | |
1120 | /* from it last if the above MII ioctls fail... */ | |
1121 | if (slave_dev->ethtool_ops) { | |
1122 | if (slave_dev->ethtool_ops->get_link) { | |
1123 | u32 link; | |
1124 | ||
1125 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
1126 | ||
1127 | return link ? BMSR_LSTATUS : 0; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | if (ioctl) { | |
1132 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1133 | etool.cmd = ETHTOOL_GLINK; | |
1134 | ifr.ifr_data = (char*)&etool; | |
1135 | if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { | |
1136 | if (etool.data == 1) { | |
1137 | return BMSR_LSTATUS; | |
1138 | } else { | |
1139 | dprintk("SIOCETHTOOL shows link down\n"); | |
1140 | return 0; | |
1141 | } | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * If reporting, report that either there's no dev->do_ioctl, | |
1147 | * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we | |
1148 | * cannot report link status). If not reporting, pretend | |
1149 | * we're ok. | |
1150 | */ | |
1151 | return (reporting ? -1 : BMSR_LSTATUS); | |
1152 | } | |
1153 | ||
1154 | /*----------------------------- Multicast list ------------------------------*/ | |
1155 | ||
1156 | /* | |
1157 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
1158 | */ | |
1159 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
1160 | { | |
1161 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
1162 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | * returns dmi entry if found, NULL otherwise | |
1167 | */ | |
1168 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
1169 | { | |
1170 | struct dev_mc_list *idmi; | |
1171 | ||
1172 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
1173 | if (bond_is_dmi_same(dmi, idmi)) { | |
1174 | return idmi; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | return NULL; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Push the promiscuity flag down to appropriate slaves | |
1183 | */ | |
1184 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
1185 | { | |
1186 | if (USES_PRIMARY(bond->params.mode)) { | |
1187 | /* write lock already acquired */ | |
1188 | if (bond->curr_active_slave) { | |
1189 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
1190 | } | |
1191 | } else { | |
1192 | struct slave *slave; | |
1193 | int i; | |
1194 | bond_for_each_slave(bond, slave, i) { | |
1195 | dev_set_promiscuity(slave->dev, inc); | |
1196 | } | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Push the allmulti flag down to all slaves | |
1202 | */ | |
1203 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
1204 | { | |
1205 | if (USES_PRIMARY(bond->params.mode)) { | |
1206 | /* write lock already acquired */ | |
1207 | if (bond->curr_active_slave) { | |
1208 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
1209 | } | |
1210 | } else { | |
1211 | struct slave *slave; | |
1212 | int i; | |
1213 | bond_for_each_slave(bond, slave, i) { | |
1214 | dev_set_allmulti(slave->dev, inc); | |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * Add a Multicast address to slaves | |
1221 | * according to mode | |
1222 | */ | |
1223 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
1224 | { | |
1225 | if (USES_PRIMARY(bond->params.mode)) { | |
1226 | /* write lock already acquired */ | |
1227 | if (bond->curr_active_slave) { | |
1228 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
1229 | } | |
1230 | } else { | |
1231 | struct slave *slave; | |
1232 | int i; | |
1233 | bond_for_each_slave(bond, slave, i) { | |
1234 | dev_mc_add(slave->dev, addr, alen, 0); | |
1235 | } | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Remove a multicast address from slave | |
1241 | * according to mode | |
1242 | */ | |
1243 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
1244 | { | |
1245 | if (USES_PRIMARY(bond->params.mode)) { | |
1246 | /* write lock already acquired */ | |
1247 | if (bond->curr_active_slave) { | |
1248 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
1249 | } | |
1250 | } else { | |
1251 | struct slave *slave; | |
1252 | int i; | |
1253 | bond_for_each_slave(bond, slave, i) { | |
1254 | dev_mc_delete(slave->dev, addr, alen, 0); | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | * Totally destroys the mc_list in bond | |
1261 | */ | |
1262 | static void bond_mc_list_destroy(struct bonding *bond) | |
1263 | { | |
1264 | struct dev_mc_list *dmi; | |
1265 | ||
1266 | dmi = bond->mc_list; | |
1267 | while (dmi) { | |
1268 | bond->mc_list = dmi->next; | |
1269 | kfree(dmi); | |
1270 | dmi = bond->mc_list; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * Copy all the Multicast addresses from src to the bonding device dst | |
1276 | */ | |
1277 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, int gpf_flag) | |
1278 | { | |
1279 | struct dev_mc_list *dmi, *new_dmi; | |
1280 | ||
1281 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
1282 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag); | |
1283 | ||
1284 | if (!new_dmi) { | |
1285 | /* FIXME: Potential memory leak !!! */ | |
1286 | return -ENOMEM; | |
1287 | } | |
1288 | ||
1289 | new_dmi->next = bond->mc_list; | |
1290 | bond->mc_list = new_dmi; | |
1291 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
1292 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
1293 | new_dmi->dmi_users = dmi->dmi_users; | |
1294 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
1295 | } | |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * flush all members of flush->mc_list from device dev->mc_list | |
1302 | */ | |
1303 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
1304 | { | |
1305 | struct bonding *bond = bond_dev->priv; | |
1306 | struct dev_mc_list *dmi; | |
1307 | ||
1308 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1309 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1310 | } | |
1311 | ||
1312 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1313 | /* del lacpdu mc addr from mc list */ | |
1314 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1315 | ||
1316 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | /*--------------------------- Active slave change ---------------------------*/ | |
1321 | ||
1322 | /* | |
1323 | * Update the mc list and multicast-related flags for the new and | |
1324 | * old active slaves (if any) according to the multicast mode, and | |
1325 | * promiscuous flags unconditionally. | |
1326 | */ | |
1327 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
1328 | { | |
1329 | struct dev_mc_list *dmi; | |
1330 | ||
1331 | if (!USES_PRIMARY(bond->params.mode)) { | |
1332 | /* nothing to do - mc list is already up-to-date on | |
1333 | * all slaves | |
1334 | */ | |
1335 | return; | |
1336 | } | |
1337 | ||
1338 | if (old_active) { | |
1339 | if (bond->dev->flags & IFF_PROMISC) { | |
1340 | dev_set_promiscuity(old_active->dev, -1); | |
1341 | } | |
1342 | ||
1343 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1344 | dev_set_allmulti(old_active->dev, -1); | |
1345 | } | |
1346 | ||
1347 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1348 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | if (new_active) { | |
1353 | if (bond->dev->flags & IFF_PROMISC) { | |
1354 | dev_set_promiscuity(new_active->dev, 1); | |
1355 | } | |
1356 | ||
1357 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1358 | dev_set_allmulti(new_active->dev, 1); | |
1359 | } | |
1360 | ||
1361 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1362 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1363 | } | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | /** | |
1368 | * find_best_interface - select the best available slave to be the active one | |
1369 | * @bond: our bonding struct | |
1370 | * | |
1371 | * Warning: Caller must hold curr_slave_lock for writing. | |
1372 | */ | |
1373 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1374 | { | |
1375 | struct slave *new_active, *old_active; | |
1376 | struct slave *bestslave = NULL; | |
1377 | int mintime = bond->params.updelay; | |
1378 | int i; | |
1379 | ||
1380 | new_active = old_active = bond->curr_active_slave; | |
1381 | ||
1382 | if (!new_active) { /* there were no active slaves left */ | |
1383 | if (bond->slave_cnt > 0) { /* found one slave */ | |
1384 | new_active = bond->first_slave; | |
1385 | } else { | |
1386 | return NULL; /* still no slave, return NULL */ | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | /* first try the primary link; if arping, a link must tx/rx traffic | |
1391 | * before it can be considered the curr_active_slave - also, we would skip | |
1392 | * slaves between the curr_active_slave and primary_slave that may be up | |
1393 | * and able to arp | |
1394 | */ | |
1395 | if ((bond->primary_slave) && | |
1396 | (!bond->params.arp_interval) && | |
1397 | (IS_UP(bond->primary_slave->dev))) { | |
1398 | new_active = bond->primary_slave; | |
1399 | } | |
1400 | ||
1401 | /* remember where to stop iterating over the slaves */ | |
1402 | old_active = new_active; | |
1403 | ||
1404 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1405 | if (IS_UP(new_active->dev)) { | |
1406 | if (new_active->link == BOND_LINK_UP) { | |
1407 | return new_active; | |
1408 | } else if (new_active->link == BOND_LINK_BACK) { | |
1409 | /* link up, but waiting for stabilization */ | |
1410 | if (new_active->delay < mintime) { | |
1411 | mintime = new_active->delay; | |
1412 | bestslave = new_active; | |
1413 | } | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | return bestslave; | |
1419 | } | |
1420 | ||
1421 | /** | |
1422 | * change_active_interface - change the active slave into the specified one | |
1423 | * @bond: our bonding struct | |
1424 | * @new: the new slave to make the active one | |
1425 | * | |
1426 | * Set the new slave to the bond's settings and unset them on the old | |
1427 | * curr_active_slave. | |
1428 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1429 | * | |
1430 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1431 | * because it is apparently the best available slave we have, even though its | |
1432 | * updelay hasn't timed out yet. | |
1433 | * | |
1434 | * Warning: Caller must hold curr_slave_lock for writing. | |
1435 | */ | |
1436 | static void bond_change_active_slave(struct bonding *bond, struct slave *new_active) | |
1437 | { | |
1438 | struct slave *old_active = bond->curr_active_slave; | |
1439 | ||
1440 | if (old_active == new_active) { | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | if (new_active) { | |
1445 | if (new_active->link == BOND_LINK_BACK) { | |
1446 | if (USES_PRIMARY(bond->params.mode)) { | |
1447 | printk(KERN_INFO DRV_NAME | |
1448 | ": %s: making interface %s the new " | |
1449 | "active one %d ms earlier.\n", | |
1450 | bond->dev->name, new_active->dev->name, | |
1451 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1452 | } | |
1453 | ||
1454 | new_active->delay = 0; | |
1455 | new_active->link = BOND_LINK_UP; | |
1456 | new_active->jiffies = jiffies; | |
1457 | ||
1458 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1459 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1460 | } | |
1461 | ||
1462 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1463 | (bond->params.mode == BOND_MODE_ALB)) { | |
1464 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1465 | } | |
1466 | } else { | |
1467 | if (USES_PRIMARY(bond->params.mode)) { | |
1468 | printk(KERN_INFO DRV_NAME | |
1469 | ": %s: making interface %s the new " | |
1470 | "active one.\n", | |
1471 | bond->dev->name, new_active->dev->name); | |
1472 | } | |
1473 | } | |
1474 | } | |
1475 | ||
1da177e4 LT |
1476 | if (USES_PRIMARY(bond->params.mode)) { |
1477 | bond_mc_swap(bond, new_active, old_active); | |
1478 | } | |
1479 | ||
1480 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1481 | (bond->params.mode == BOND_MODE_ALB)) { | |
1482 | bond_alb_handle_active_change(bond, new_active); | |
1483 | } else { | |
1484 | bond->curr_active_slave = new_active; | |
1485 | } | |
c3ade5ca JV |
1486 | |
1487 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1488 | if (old_active) { | |
1489 | bond_set_slave_inactive_flags(old_active); | |
1490 | } | |
1491 | ||
1492 | if (new_active) { | |
1493 | bond_set_slave_active_flags(new_active); | |
1494 | } | |
1495 | bond_send_gratuitous_arp(bond); | |
1496 | } | |
1da177e4 LT |
1497 | } |
1498 | ||
1499 | /** | |
1500 | * bond_select_active_slave - select a new active slave, if needed | |
1501 | * @bond: our bonding struct | |
1502 | * | |
1503 | * This functions shoud be called when one of the following occurs: | |
1504 | * - The old curr_active_slave has been released or lost its link. | |
1505 | * - The primary_slave has got its link back. | |
1506 | * - A slave has got its link back and there's no old curr_active_slave. | |
1507 | * | |
1508 | * Warning: Caller must hold curr_slave_lock for writing. | |
1509 | */ | |
1510 | static void bond_select_active_slave(struct bonding *bond) | |
1511 | { | |
1512 | struct slave *best_slave; | |
1513 | ||
1514 | best_slave = bond_find_best_slave(bond); | |
1515 | if (best_slave != bond->curr_active_slave) { | |
1516 | bond_change_active_slave(bond, best_slave); | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | /*--------------------------- slave list handling ---------------------------*/ | |
1521 | ||
1522 | /* | |
1523 | * This function attaches the slave to the end of list. | |
1524 | * | |
1525 | * bond->lock held for writing by caller. | |
1526 | */ | |
1527 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1528 | { | |
1529 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1530 | new_slave->next = new_slave; | |
1531 | new_slave->prev = new_slave; | |
1532 | bond->first_slave = new_slave; | |
1533 | } else { | |
1534 | new_slave->next = bond->first_slave; | |
1535 | new_slave->prev = bond->first_slave->prev; | |
1536 | new_slave->next->prev = new_slave; | |
1537 | new_slave->prev->next = new_slave; | |
1538 | } | |
1539 | ||
1540 | bond->slave_cnt++; | |
1541 | } | |
1542 | ||
1543 | /* | |
1544 | * This function detaches the slave from the list. | |
1545 | * WARNING: no check is made to verify if the slave effectively | |
1546 | * belongs to <bond>. | |
1547 | * Nothing is freed on return, structures are just unchained. | |
1548 | * If any slave pointer in bond was pointing to <slave>, | |
1549 | * it should be changed by the calling function. | |
1550 | * | |
1551 | * bond->lock held for writing by caller. | |
1552 | */ | |
1553 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1554 | { | |
1555 | if (slave->next) { | |
1556 | slave->next->prev = slave->prev; | |
1557 | } | |
1558 | ||
1559 | if (slave->prev) { | |
1560 | slave->prev->next = slave->next; | |
1561 | } | |
1562 | ||
1563 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1564 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1565 | bond->first_slave = slave->next; | |
1566 | } else { | |
1567 | bond->first_slave = NULL; /* slave was the last one */ | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | slave->next = NULL; | |
1572 | slave->prev = NULL; | |
1573 | bond->slave_cnt--; | |
1574 | } | |
1575 | ||
1576 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1577 | ||
1578 | static int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) | |
1579 | { | |
1580 | dprintk("bond_dev=%p\n", bond_dev); | |
1581 | dprintk("slave_dev=%p\n", slave_dev); | |
1582 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1583 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1584 | return 0; | |
1585 | } | |
1586 | ||
1587 | /* enslave device <slave> to bond device <master> */ | |
1588 | static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) | |
1589 | { | |
1590 | struct bonding *bond = bond_dev->priv; | |
1591 | struct slave *new_slave = NULL; | |
1592 | struct dev_mc_list *dmi; | |
1593 | struct sockaddr addr; | |
1594 | int link_reporting; | |
1595 | int old_features = bond_dev->features; | |
1596 | int res = 0; | |
1597 | ||
1598 | if (slave_dev->do_ioctl == NULL) { | |
1599 | printk(KERN_WARNING DRV_NAME | |
1600 | ": Warning : no link monitoring support for %s\n", | |
1601 | slave_dev->name); | |
1602 | } | |
1603 | ||
1604 | /* bond must be initialized by bond_open() before enslaving */ | |
1605 | if (!(bond_dev->flags & IFF_UP)) { | |
1606 | dprintk("Error, master_dev is not up\n"); | |
1607 | return -EPERM; | |
1608 | } | |
1609 | ||
1610 | /* already enslaved */ | |
1611 | if (slave_dev->flags & IFF_SLAVE) { | |
1612 | dprintk("Error, Device was already enslaved\n"); | |
1613 | return -EBUSY; | |
1614 | } | |
1615 | ||
1616 | /* vlan challenged mutual exclusion */ | |
1617 | /* no need to lock since we're protected by rtnl_lock */ | |
1618 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1619 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1620 | if (!list_empty(&bond->vlan_list)) { | |
1621 | printk(KERN_ERR DRV_NAME | |
1622 | ": Error: cannot enslave VLAN " | |
1623 | "challenged slave %s on VLAN enabled " | |
1624 | "bond %s\n", slave_dev->name, | |
1625 | bond_dev->name); | |
1626 | return -EPERM; | |
1627 | } else { | |
1628 | printk(KERN_WARNING DRV_NAME | |
1629 | ": Warning: enslaved VLAN challenged " | |
1630 | "slave %s. Adding VLANs will be blocked as " | |
1631 | "long as %s is part of bond %s\n", | |
1632 | slave_dev->name, slave_dev->name, | |
1633 | bond_dev->name); | |
1634 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1635 | } | |
1636 | } else { | |
1637 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1638 | if (bond->slave_cnt == 0) { | |
1639 | /* First slave, and it is not VLAN challenged, | |
1640 | * so remove the block of adding VLANs over the bond. | |
1641 | */ | |
1642 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | if (app_abi_ver >= 1) { | |
1647 | /* The application is using an ABI, which requires the | |
1648 | * slave interface to be closed. | |
1649 | */ | |
1650 | if ((slave_dev->flags & IFF_UP)) { | |
1651 | printk(KERN_ERR DRV_NAME | |
1652 | ": Error: %s is up\n", | |
1653 | slave_dev->name); | |
1654 | res = -EPERM; | |
1655 | goto err_undo_flags; | |
1656 | } | |
1657 | ||
1658 | if (slave_dev->set_mac_address == NULL) { | |
1659 | printk(KERN_ERR DRV_NAME | |
1660 | ": Error: The slave device you specified does " | |
1661 | "not support setting the MAC address.\n"); | |
1662 | printk(KERN_ERR | |
1663 | "Your kernel likely does not support slave " | |
1664 | "devices.\n"); | |
1665 | ||
1666 | res = -EOPNOTSUPP; | |
1667 | goto err_undo_flags; | |
1668 | } | |
1669 | } else { | |
1670 | /* The application is not using an ABI, which requires the | |
1671 | * slave interface to be open. | |
1672 | */ | |
1673 | if (!(slave_dev->flags & IFF_UP)) { | |
1674 | printk(KERN_ERR DRV_NAME | |
1675 | ": Error: %s is not running\n", | |
1676 | slave_dev->name); | |
1677 | res = -EINVAL; | |
1678 | goto err_undo_flags; | |
1679 | } | |
1680 | ||
1681 | if ((bond->params.mode == BOND_MODE_8023AD) || | |
1682 | (bond->params.mode == BOND_MODE_TLB) || | |
1683 | (bond->params.mode == BOND_MODE_ALB)) { | |
1684 | printk(KERN_ERR DRV_NAME | |
1685 | ": Error: to use %s mode, you must upgrade " | |
1686 | "ifenslave.\n", | |
1687 | bond_mode_name(bond->params.mode)); | |
1688 | res = -EOPNOTSUPP; | |
1689 | goto err_undo_flags; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); | |
1694 | if (!new_slave) { | |
1695 | res = -ENOMEM; | |
1696 | goto err_undo_flags; | |
1697 | } | |
1698 | ||
1699 | memset(new_slave, 0, sizeof(struct slave)); | |
1700 | ||
1701 | /* save slave's original flags before calling | |
1702 | * netdev_set_master and dev_open | |
1703 | */ | |
1704 | new_slave->original_flags = slave_dev->flags; | |
1705 | ||
1706 | if (app_abi_ver >= 1) { | |
1707 | /* save slave's original ("permanent") mac address for | |
1708 | * modes that needs it, and for restoring it upon release, | |
1709 | * and then set it to the master's address | |
1710 | */ | |
1711 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1712 | ||
1713 | /* set slave to master's mac address | |
1714 | * The application already set the master's | |
1715 | * mac address to that of the first slave | |
1716 | */ | |
1717 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1718 | addr.sa_family = slave_dev->type; | |
1719 | res = dev_set_mac_address(slave_dev, &addr); | |
1720 | if (res) { | |
1721 | dprintk("Error %d calling set_mac_address\n", res); | |
1722 | goto err_free; | |
1723 | } | |
1724 | ||
1725 | /* open the slave since the application closed it */ | |
1726 | res = dev_open(slave_dev); | |
1727 | if (res) { | |
1728 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
1729 | goto err_restore_mac; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | res = netdev_set_master(slave_dev, bond_dev); | |
1734 | if (res) { | |
1735 | dprintk("Error %d calling netdev_set_master\n", res); | |
1736 | if (app_abi_ver < 1) { | |
1737 | goto err_free; | |
1738 | } else { | |
1739 | goto err_close; | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | new_slave->dev = slave_dev; | |
1744 | ||
1745 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1746 | (bond->params.mode == BOND_MODE_ALB)) { | |
1747 | /* bond_alb_init_slave() must be called before all other stages since | |
1748 | * it might fail and we do not want to have to undo everything | |
1749 | */ | |
1750 | res = bond_alb_init_slave(bond, new_slave); | |
1751 | if (res) { | |
1752 | goto err_unset_master; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1757 | * master's promisc (and mc) settings only if it becomes the | |
1758 | * curr_active_slave, and that is taken care of later when calling | |
1759 | * bond_change_active() | |
1760 | */ | |
1761 | if (!USES_PRIMARY(bond->params.mode)) { | |
1762 | /* set promiscuity level to new slave */ | |
1763 | if (bond_dev->flags & IFF_PROMISC) { | |
1764 | dev_set_promiscuity(slave_dev, 1); | |
1765 | } | |
1766 | ||
1767 | /* set allmulti level to new slave */ | |
1768 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1769 | dev_set_allmulti(slave_dev, 1); | |
1770 | } | |
1771 | ||
1772 | /* upload master's mc_list to new slave */ | |
1773 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1774 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1779 | /* add lacpdu mc addr to mc list */ | |
1780 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1781 | ||
1782 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1783 | } | |
1784 | ||
1785 | bond_add_vlans_on_slave(bond, slave_dev); | |
1786 | ||
1787 | write_lock_bh(&bond->lock); | |
1788 | ||
1789 | bond_attach_slave(bond, new_slave); | |
1790 | ||
1791 | new_slave->delay = 0; | |
1792 | new_slave->link_failure_count = 0; | |
1793 | ||
1794 | if (bond->params.miimon && !bond->params.use_carrier) { | |
1795 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1796 | ||
1797 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1798 | /* | |
1799 | * miimon is set but a bonded network driver | |
1800 | * does not support ETHTOOL/MII and | |
1801 | * arp_interval is not set. Note: if | |
1802 | * use_carrier is enabled, we will never go | |
1803 | * here (because netif_carrier is always | |
1804 | * supported); thus, we don't need to change | |
1805 | * the messages for netif_carrier. | |
1806 | */ | |
1807 | printk(KERN_WARNING DRV_NAME | |
1808 | ": Warning: MII and ETHTOOL support not " | |
1809 | "available for interface %s, and " | |
1810 | "arp_interval/arp_ip_target module parameters " | |
1811 | "not specified, thus bonding will not detect " | |
1812 | "link failures! see bonding.txt for details.\n", | |
1813 | slave_dev->name); | |
1814 | } else if (link_reporting == -1) { | |
1815 | /* unable get link status using mii/ethtool */ | |
1816 | printk(KERN_WARNING DRV_NAME | |
1817 | ": Warning: can't get link status from " | |
1818 | "interface %s; the network driver associated " | |
1819 | "with this interface does not support MII or " | |
1820 | "ETHTOOL link status reporting, thus miimon " | |
1821 | "has no effect on this interface.\n", | |
1822 | slave_dev->name); | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | /* check for initial state */ | |
1827 | if (!bond->params.miimon || | |
1828 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1829 | if (bond->params.updelay) { | |
1830 | dprintk("Initial state of slave_dev is " | |
1831 | "BOND_LINK_BACK\n"); | |
1832 | new_slave->link = BOND_LINK_BACK; | |
1833 | new_slave->delay = bond->params.updelay; | |
1834 | } else { | |
1835 | dprintk("Initial state of slave_dev is " | |
1836 | "BOND_LINK_UP\n"); | |
1837 | new_slave->link = BOND_LINK_UP; | |
1838 | } | |
1839 | new_slave->jiffies = jiffies; | |
1840 | } else { | |
1841 | dprintk("Initial state of slave_dev is " | |
1842 | "BOND_LINK_DOWN\n"); | |
1843 | new_slave->link = BOND_LINK_DOWN; | |
1844 | } | |
1845 | ||
1846 | if (bond_update_speed_duplex(new_slave) && | |
1847 | (new_slave->link != BOND_LINK_DOWN)) { | |
1848 | printk(KERN_WARNING DRV_NAME | |
1849 | ": Warning: failed to get speed and duplex from %s, " | |
1850 | "assumed to be 100Mb/sec and Full.\n", | |
1851 | new_slave->dev->name); | |
1852 | ||
1853 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1854 | printk(KERN_WARNING | |
1855 | "Operation of 802.3ad mode requires ETHTOOL " | |
1856 | "support in base driver for proper aggregator " | |
1857 | "selection.\n"); | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1862 | /* if there is a primary slave, remember it */ | |
1863 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1864 | bond->primary_slave = new_slave; | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | switch (bond->params.mode) { | |
1869 | case BOND_MODE_ACTIVEBACKUP: | |
1870 | /* if we're in active-backup mode, we need one and only one active | |
1871 | * interface. The backup interfaces will have their NOARP flag set | |
1872 | * because we need them to be completely deaf and not to respond to | |
1873 | * any ARP request on the network to avoid fooling a switch. Thus, | |
1874 | * since we guarantee that curr_active_slave always point to the last | |
1875 | * usable interface, we just have to verify this interface's flag. | |
1876 | */ | |
1877 | if (((!bond->curr_active_slave) || | |
1878 | (bond->curr_active_slave->dev->flags & IFF_NOARP)) && | |
1879 | (new_slave->link != BOND_LINK_DOWN)) { | |
1880 | dprintk("This is the first active slave\n"); | |
1881 | /* first slave or no active slave yet, and this link | |
1882 | is OK, so make this interface the active one */ | |
1883 | bond_change_active_slave(bond, new_slave); | |
1884 | } else { | |
1885 | dprintk("This is just a backup slave\n"); | |
1886 | bond_set_slave_inactive_flags(new_slave); | |
1887 | } | |
1888 | break; | |
1889 | case BOND_MODE_8023AD: | |
1890 | /* in 802.3ad mode, the internal mechanism | |
1891 | * will activate the slaves in the selected | |
1892 | * aggregator | |
1893 | */ | |
1894 | bond_set_slave_inactive_flags(new_slave); | |
1895 | /* if this is the first slave */ | |
1896 | if (bond->slave_cnt == 1) { | |
1897 | SLAVE_AD_INFO(new_slave).id = 1; | |
1898 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1899 | * can be called only after the mac address of the bond is set | |
1900 | */ | |
1901 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1902 | bond->params.lacp_fast); | |
1903 | } else { | |
1904 | SLAVE_AD_INFO(new_slave).id = | |
1905 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1906 | } | |
1907 | ||
1908 | bond_3ad_bind_slave(new_slave); | |
1909 | break; | |
1910 | case BOND_MODE_TLB: | |
1911 | case BOND_MODE_ALB: | |
1912 | new_slave->state = BOND_STATE_ACTIVE; | |
1913 | if ((!bond->curr_active_slave) && | |
1914 | (new_slave->link != BOND_LINK_DOWN)) { | |
1915 | /* first slave or no active slave yet, and this link | |
1916 | * is OK, so make this interface the active one | |
1917 | */ | |
1918 | bond_change_active_slave(bond, new_slave); | |
1919 | } | |
1920 | break; | |
1921 | default: | |
1922 | dprintk("This slave is always active in trunk mode\n"); | |
1923 | ||
1924 | /* always active in trunk mode */ | |
1925 | new_slave->state = BOND_STATE_ACTIVE; | |
1926 | ||
1927 | /* In trunking mode there is little meaning to curr_active_slave | |
1928 | * anyway (it holds no special properties of the bond device), | |
1929 | * so we can change it without calling change_active_interface() | |
1930 | */ | |
1931 | if (!bond->curr_active_slave) { | |
1932 | bond->curr_active_slave = new_slave; | |
1933 | } | |
1934 | break; | |
1935 | } /* switch(bond_mode) */ | |
1936 | ||
1937 | write_unlock_bh(&bond->lock); | |
1938 | ||
1939 | if (app_abi_ver < 1) { | |
1940 | /* | |
1941 | * !!! This is to support old versions of ifenslave. | |
1942 | * We can remove this in 2.5 because our ifenslave takes | |
1943 | * care of this for us. | |
1944 | * We check to see if the master has a mac address yet. | |
1945 | * If not, we'll give it the mac address of our slave device. | |
1946 | */ | |
1947 | int ndx = 0; | |
1948 | ||
1949 | for (ndx = 0; ndx < bond_dev->addr_len; ndx++) { | |
1950 | dprintk("Checking ndx=%d of bond_dev->dev_addr\n", | |
1951 | ndx); | |
1952 | if (bond_dev->dev_addr[ndx] != 0) { | |
1953 | dprintk("Found non-zero byte at ndx=%d\n", | |
1954 | ndx); | |
1955 | break; | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | if (ndx == bond_dev->addr_len) { | |
1960 | /* | |
1961 | * We got all the way through the address and it was | |
1962 | * all 0's. | |
1963 | */ | |
1964 | dprintk("%s doesn't have a MAC address yet. \n", | |
1965 | bond_dev->name); | |
1966 | dprintk("Going to give assign it from %s.\n", | |
1967 | slave_dev->name); | |
1968 | bond_sethwaddr(bond_dev, slave_dev); | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | printk(KERN_INFO DRV_NAME | |
1973 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1974 | bond_dev->name, slave_dev->name, | |
1975 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1976 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1977 | ||
1978 | /* enslave is successful */ | |
1979 | return 0; | |
1980 | ||
1981 | /* Undo stages on error */ | |
1982 | err_unset_master: | |
1983 | netdev_set_master(slave_dev, NULL); | |
1984 | ||
1985 | err_close: | |
1986 | dev_close(slave_dev); | |
1987 | ||
1988 | err_restore_mac: | |
1989 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); | |
1990 | addr.sa_family = slave_dev->type; | |
1991 | dev_set_mac_address(slave_dev, &addr); | |
1992 | ||
1993 | err_free: | |
1994 | kfree(new_slave); | |
1995 | ||
1996 | err_undo_flags: | |
1997 | bond_dev->features = old_features; | |
1998 | ||
1999 | return res; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Try to release the slave device <slave> from the bond device <master> | |
2004 | * It is legal to access curr_active_slave without a lock because all the function | |
2005 | * is write-locked. | |
2006 | * | |
2007 | * The rules for slave state should be: | |
2008 | * for Active/Backup: | |
2009 | * Active stays on all backups go down | |
2010 | * for Bonded connections: | |
2011 | * The first up interface should be left on and all others downed. | |
2012 | */ | |
2013 | static int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) | |
2014 | { | |
2015 | struct bonding *bond = bond_dev->priv; | |
2016 | struct slave *slave, *oldcurrent; | |
2017 | struct sockaddr addr; | |
2018 | int mac_addr_differ; | |
2019 | ||
2020 | /* slave is not a slave or master is not master of this slave */ | |
2021 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2022 | (slave_dev->master != bond_dev)) { | |
2023 | printk(KERN_ERR DRV_NAME | |
2024 | ": Error: %s: cannot release %s.\n", | |
2025 | bond_dev->name, slave_dev->name); | |
2026 | return -EINVAL; | |
2027 | } | |
2028 | ||
2029 | write_lock_bh(&bond->lock); | |
2030 | ||
2031 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
2032 | if (!slave) { | |
2033 | /* not a slave of this bond */ | |
2034 | printk(KERN_INFO DRV_NAME | |
2035 | ": %s: %s not enslaved\n", | |
2036 | bond_dev->name, slave_dev->name); | |
2037 | return -EINVAL; | |
2038 | } | |
2039 | ||
2040 | mac_addr_differ = memcmp(bond_dev->dev_addr, | |
2041 | slave->perm_hwaddr, | |
2042 | ETH_ALEN); | |
2043 | if (!mac_addr_differ && (bond->slave_cnt > 1)) { | |
2044 | printk(KERN_WARNING DRV_NAME | |
2045 | ": Warning: the permanent HWaddr of %s " | |
2046 | "- %02X:%02X:%02X:%02X:%02X:%02X - is " | |
2047 | "still in use by %s. Set the HWaddr of " | |
2048 | "%s to a different address to avoid " | |
2049 | "conflicts.\n", | |
2050 | slave_dev->name, | |
2051 | slave->perm_hwaddr[0], | |
2052 | slave->perm_hwaddr[1], | |
2053 | slave->perm_hwaddr[2], | |
2054 | slave->perm_hwaddr[3], | |
2055 | slave->perm_hwaddr[4], | |
2056 | slave->perm_hwaddr[5], | |
2057 | bond_dev->name, | |
2058 | slave_dev->name); | |
2059 | } | |
2060 | ||
2061 | /* Inform AD package of unbinding of slave. */ | |
2062 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2063 | /* must be called before the slave is | |
2064 | * detached from the list | |
2065 | */ | |
2066 | bond_3ad_unbind_slave(slave); | |
2067 | } | |
2068 | ||
2069 | printk(KERN_INFO DRV_NAME | |
2070 | ": %s: releasing %s interface %s\n", | |
2071 | bond_dev->name, | |
2072 | (slave->state == BOND_STATE_ACTIVE) | |
2073 | ? "active" : "backup", | |
2074 | slave_dev->name); | |
2075 | ||
2076 | oldcurrent = bond->curr_active_slave; | |
2077 | ||
2078 | bond->current_arp_slave = NULL; | |
2079 | ||
2080 | /* release the slave from its bond */ | |
2081 | bond_detach_slave(bond, slave); | |
2082 | ||
2083 | if (bond->primary_slave == slave) { | |
2084 | bond->primary_slave = NULL; | |
2085 | } | |
2086 | ||
2087 | if (oldcurrent == slave) { | |
2088 | bond_change_active_slave(bond, NULL); | |
2089 | } | |
2090 | ||
2091 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2092 | (bond->params.mode == BOND_MODE_ALB)) { | |
2093 | /* Must be called only after the slave has been | |
2094 | * detached from the list and the curr_active_slave | |
2095 | * has been cleared (if our_slave == old_current), | |
2096 | * but before a new active slave is selected. | |
2097 | */ | |
2098 | bond_alb_deinit_slave(bond, slave); | |
2099 | } | |
2100 | ||
2101 | if (oldcurrent == slave) { | |
2102 | bond_select_active_slave(bond); | |
2103 | ||
2104 | if (!bond->curr_active_slave) { | |
2105 | printk(KERN_INFO DRV_NAME | |
2106 | ": %s: now running without any active " | |
2107 | "interface !\n", | |
2108 | bond_dev->name); | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | if (bond->slave_cnt == 0) { | |
2113 | /* if the last slave was removed, zero the mac address | |
2114 | * of the master so it will be set by the application | |
2115 | * to the mac address of the first slave | |
2116 | */ | |
2117 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2118 | ||
2119 | if (list_empty(&bond->vlan_list)) { | |
2120 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2121 | } else { | |
2122 | printk(KERN_WARNING DRV_NAME | |
2123 | ": Warning: clearing HW address of %s while it " | |
2124 | "still has VLANs.\n", | |
2125 | bond_dev->name); | |
2126 | printk(KERN_WARNING DRV_NAME | |
2127 | ": When re-adding slaves, make sure the bond's " | |
2128 | "HW address matches its VLANs'.\n"); | |
2129 | } | |
2130 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2131 | !bond_has_challenged_slaves(bond)) { | |
2132 | printk(KERN_INFO DRV_NAME | |
2133 | ": last VLAN challenged slave %s " | |
2134 | "left bond %s. VLAN blocking is removed\n", | |
2135 | slave_dev->name, bond_dev->name); | |
2136 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
2137 | } | |
2138 | ||
2139 | write_unlock_bh(&bond->lock); | |
2140 | ||
2141 | bond_del_vlans_from_slave(bond, slave_dev); | |
2142 | ||
2143 | /* If the mode USES_PRIMARY, then we should only remove its | |
2144 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2145 | * already taken care of above when we detached the slave | |
2146 | */ | |
2147 | if (!USES_PRIMARY(bond->params.mode)) { | |
2148 | /* unset promiscuity level from slave */ | |
2149 | if (bond_dev->flags & IFF_PROMISC) { | |
2150 | dev_set_promiscuity(slave_dev, -1); | |
2151 | } | |
2152 | ||
2153 | /* unset allmulti level from slave */ | |
2154 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2155 | dev_set_allmulti(slave_dev, -1); | |
2156 | } | |
2157 | ||
2158 | /* flush master's mc_list from slave */ | |
2159 | bond_mc_list_flush(bond_dev, slave_dev); | |
2160 | } | |
2161 | ||
2162 | netdev_set_master(slave_dev, NULL); | |
2163 | ||
2164 | /* close slave before restoring its mac address */ | |
2165 | dev_close(slave_dev); | |
2166 | ||
2167 | if (app_abi_ver >= 1) { | |
2168 | /* restore original ("permanent") mac address */ | |
2169 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2170 | addr.sa_family = slave_dev->type; | |
2171 | dev_set_mac_address(slave_dev, &addr); | |
2172 | } | |
2173 | ||
2174 | /* restore the original state of the | |
2175 | * IFF_NOARP flag that might have been | |
2176 | * set by bond_set_slave_inactive_flags() | |
2177 | */ | |
2178 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2179 | slave_dev->flags &= ~IFF_NOARP; | |
2180 | } | |
2181 | ||
2182 | kfree(slave); | |
2183 | ||
2184 | return 0; /* deletion OK */ | |
2185 | } | |
2186 | ||
2187 | /* | |
2188 | * This function releases all slaves. | |
2189 | */ | |
2190 | static int bond_release_all(struct net_device *bond_dev) | |
2191 | { | |
2192 | struct bonding *bond = bond_dev->priv; | |
2193 | struct slave *slave; | |
2194 | struct net_device *slave_dev; | |
2195 | struct sockaddr addr; | |
2196 | ||
2197 | write_lock_bh(&bond->lock); | |
2198 | ||
2199 | if (bond->slave_cnt == 0) { | |
2200 | goto out; | |
2201 | } | |
2202 | ||
2203 | bond->current_arp_slave = NULL; | |
2204 | bond->primary_slave = NULL; | |
2205 | bond_change_active_slave(bond, NULL); | |
2206 | ||
2207 | while ((slave = bond->first_slave) != NULL) { | |
2208 | /* Inform AD package of unbinding of slave | |
2209 | * before slave is detached from the list. | |
2210 | */ | |
2211 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2212 | bond_3ad_unbind_slave(slave); | |
2213 | } | |
2214 | ||
2215 | slave_dev = slave->dev; | |
2216 | bond_detach_slave(bond, slave); | |
2217 | ||
2218 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2219 | (bond->params.mode == BOND_MODE_ALB)) { | |
2220 | /* must be called only after the slave | |
2221 | * has been detached from the list | |
2222 | */ | |
2223 | bond_alb_deinit_slave(bond, slave); | |
2224 | } | |
2225 | ||
2226 | /* now that the slave is detached, unlock and perform | |
2227 | * all the undo steps that should not be called from | |
2228 | * within a lock. | |
2229 | */ | |
2230 | write_unlock_bh(&bond->lock); | |
2231 | ||
2232 | bond_del_vlans_from_slave(bond, slave_dev); | |
2233 | ||
2234 | /* If the mode USES_PRIMARY, then we should only remove its | |
2235 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2236 | * already taken care of above when we detached the slave | |
2237 | */ | |
2238 | if (!USES_PRIMARY(bond->params.mode)) { | |
2239 | /* unset promiscuity level from slave */ | |
2240 | if (bond_dev->flags & IFF_PROMISC) { | |
2241 | dev_set_promiscuity(slave_dev, -1); | |
2242 | } | |
2243 | ||
2244 | /* unset allmulti level from slave */ | |
2245 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2246 | dev_set_allmulti(slave_dev, -1); | |
2247 | } | |
2248 | ||
2249 | /* flush master's mc_list from slave */ | |
2250 | bond_mc_list_flush(bond_dev, slave_dev); | |
2251 | } | |
2252 | ||
2253 | netdev_set_master(slave_dev, NULL); | |
2254 | ||
2255 | /* close slave before restoring its mac address */ | |
2256 | dev_close(slave_dev); | |
2257 | ||
2258 | if (app_abi_ver >= 1) { | |
2259 | /* restore original ("permanent") mac address*/ | |
2260 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2261 | addr.sa_family = slave_dev->type; | |
2262 | dev_set_mac_address(slave_dev, &addr); | |
2263 | } | |
2264 | ||
2265 | /* restore the original state of the IFF_NOARP flag that might have | |
2266 | * been set by bond_set_slave_inactive_flags() | |
2267 | */ | |
2268 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2269 | slave_dev->flags &= ~IFF_NOARP; | |
2270 | } | |
2271 | ||
2272 | kfree(slave); | |
2273 | ||
2274 | /* re-acquire the lock before getting the next slave */ | |
2275 | write_lock_bh(&bond->lock); | |
2276 | } | |
2277 | ||
2278 | /* zero the mac address of the master so it will be | |
2279 | * set by the application to the mac address of the | |
2280 | * first slave | |
2281 | */ | |
2282 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2283 | ||
2284 | if (list_empty(&bond->vlan_list)) { | |
2285 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2286 | } else { | |
2287 | printk(KERN_WARNING DRV_NAME | |
2288 | ": Warning: clearing HW address of %s while it " | |
2289 | "still has VLANs.\n", | |
2290 | bond_dev->name); | |
2291 | printk(KERN_WARNING DRV_NAME | |
2292 | ": When re-adding slaves, make sure the bond's " | |
2293 | "HW address matches its VLANs'.\n"); | |
2294 | } | |
2295 | ||
2296 | printk(KERN_INFO DRV_NAME | |
2297 | ": %s: released all slaves\n", | |
2298 | bond_dev->name); | |
2299 | ||
2300 | out: | |
2301 | write_unlock_bh(&bond->lock); | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
2306 | /* | |
2307 | * This function changes the active slave to slave <slave_dev>. | |
2308 | * It returns -EINVAL in the following cases. | |
2309 | * - <slave_dev> is not found in the list. | |
2310 | * - There is not active slave now. | |
2311 | * - <slave_dev> is already active. | |
2312 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2313 | * - <slave_dev> is not running. | |
2314 | * In these cases, this fuction does nothing. | |
2315 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
2316 | */ | |
2317 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2318 | { | |
2319 | struct bonding *bond = bond_dev->priv; | |
2320 | struct slave *old_active = NULL; | |
2321 | struct slave *new_active = NULL; | |
2322 | int res = 0; | |
2323 | ||
2324 | if (!USES_PRIMARY(bond->params.mode)) { | |
2325 | return -EINVAL; | |
2326 | } | |
2327 | ||
2328 | /* Verify that master_dev is indeed the master of slave_dev */ | |
2329 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2330 | (slave_dev->master != bond_dev)) { | |
2331 | return -EINVAL; | |
2332 | } | |
2333 | ||
2334 | write_lock_bh(&bond->lock); | |
2335 | ||
2336 | old_active = bond->curr_active_slave; | |
2337 | new_active = bond_get_slave_by_dev(bond, slave_dev); | |
2338 | ||
2339 | /* | |
2340 | * Changing to the current active: do nothing; return success. | |
2341 | */ | |
2342 | if (new_active && (new_active == old_active)) { | |
2343 | write_unlock_bh(&bond->lock); | |
2344 | return 0; | |
2345 | } | |
2346 | ||
2347 | if ((new_active) && | |
2348 | (old_active) && | |
2349 | (new_active->link == BOND_LINK_UP) && | |
2350 | IS_UP(new_active->dev)) { | |
2351 | bond_change_active_slave(bond, new_active); | |
2352 | } else { | |
2353 | res = -EINVAL; | |
2354 | } | |
2355 | ||
2356 | write_unlock_bh(&bond->lock); | |
2357 | ||
2358 | return res; | |
2359 | } | |
2360 | ||
2361 | static int bond_ethtool_ioctl(struct net_device *bond_dev, struct ifreq *ifr) | |
2362 | { | |
2363 | struct ethtool_drvinfo info; | |
2364 | void __user *addr = ifr->ifr_data; | |
2365 | uint32_t cmd; | |
2366 | ||
2367 | if (get_user(cmd, (uint32_t __user *)addr)) { | |
2368 | return -EFAULT; | |
2369 | } | |
2370 | ||
2371 | switch (cmd) { | |
2372 | case ETHTOOL_GDRVINFO: | |
2373 | if (copy_from_user(&info, addr, sizeof(info))) { | |
2374 | return -EFAULT; | |
2375 | } | |
2376 | ||
2377 | if (strcmp(info.driver, "ifenslave") == 0) { | |
2378 | int new_abi_ver; | |
2379 | char *endptr; | |
2380 | ||
2381 | new_abi_ver = simple_strtoul(info.fw_version, | |
2382 | &endptr, 0); | |
2383 | if (*endptr) { | |
2384 | printk(KERN_ERR DRV_NAME | |
2385 | ": Error: got invalid ABI " | |
2386 | "version from application\n"); | |
2387 | ||
2388 | return -EINVAL; | |
2389 | } | |
2390 | ||
2391 | if (orig_app_abi_ver == -1) { | |
2392 | orig_app_abi_ver = new_abi_ver; | |
2393 | } | |
2394 | ||
2395 | app_abi_ver = new_abi_ver; | |
2396 | } | |
2397 | ||
2398 | strncpy(info.driver, DRV_NAME, 32); | |
2399 | strncpy(info.version, DRV_VERSION, 32); | |
2400 | snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION); | |
2401 | ||
2402 | if (copy_to_user(addr, &info, sizeof(info))) { | |
2403 | return -EFAULT; | |
2404 | } | |
2405 | ||
2406 | return 0; | |
2407 | default: | |
2408 | return -EOPNOTSUPP; | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) | |
2413 | { | |
2414 | struct bonding *bond = bond_dev->priv; | |
2415 | ||
2416 | info->bond_mode = bond->params.mode; | |
2417 | info->miimon = bond->params.miimon; | |
2418 | ||
2419 | read_lock_bh(&bond->lock); | |
2420 | info->num_slaves = bond->slave_cnt; | |
2421 | read_unlock_bh(&bond->lock); | |
2422 | ||
2423 | return 0; | |
2424 | } | |
2425 | ||
2426 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2427 | { | |
2428 | struct bonding *bond = bond_dev->priv; | |
2429 | struct slave *slave; | |
2430 | int i, found = 0; | |
2431 | ||
2432 | if (info->slave_id < 0) { | |
2433 | return -ENODEV; | |
2434 | } | |
2435 | ||
2436 | read_lock_bh(&bond->lock); | |
2437 | ||
2438 | bond_for_each_slave(bond, slave, i) { | |
2439 | if (i == (int)info->slave_id) { | |
2440 | found = 1; | |
2441 | break; | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | read_unlock_bh(&bond->lock); | |
2446 | ||
2447 | if (found) { | |
2448 | strcpy(info->slave_name, slave->dev->name); | |
2449 | info->link = slave->link; | |
2450 | info->state = slave->state; | |
2451 | info->link_failure_count = slave->link_failure_count; | |
2452 | } else { | |
2453 | return -ENODEV; | |
2454 | } | |
2455 | ||
2456 | return 0; | |
2457 | } | |
2458 | ||
2459 | /*-------------------------------- Monitoring -------------------------------*/ | |
2460 | ||
2461 | /* this function is called regularly to monitor each slave's link. */ | |
2462 | static void bond_mii_monitor(struct net_device *bond_dev) | |
2463 | { | |
2464 | struct bonding *bond = bond_dev->priv; | |
2465 | struct slave *slave, *oldcurrent; | |
2466 | int do_failover = 0; | |
2467 | int delta_in_ticks; | |
2468 | int i; | |
2469 | ||
2470 | read_lock(&bond->lock); | |
2471 | ||
2472 | delta_in_ticks = (bond->params.miimon * HZ) / 1000; | |
2473 | ||
2474 | if (bond->kill_timers) { | |
2475 | goto out; | |
2476 | } | |
2477 | ||
2478 | if (bond->slave_cnt == 0) { | |
2479 | goto re_arm; | |
2480 | } | |
2481 | ||
2482 | /* we will try to read the link status of each of our slaves, and | |
2483 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2484 | * supporting MII status, we won't do anything so that a user-space | |
2485 | * program could monitor the link itself if needed. | |
2486 | */ | |
2487 | ||
2488 | read_lock(&bond->curr_slave_lock); | |
2489 | oldcurrent = bond->curr_active_slave; | |
2490 | read_unlock(&bond->curr_slave_lock); | |
2491 | ||
2492 | bond_for_each_slave(bond, slave, i) { | |
2493 | struct net_device *slave_dev = slave->dev; | |
2494 | int link_state; | |
2495 | u16 old_speed = slave->speed; | |
2496 | u8 old_duplex = slave->duplex; | |
2497 | ||
2498 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2499 | ||
2500 | switch (slave->link) { | |
2501 | case BOND_LINK_UP: /* the link was up */ | |
2502 | if (link_state == BMSR_LSTATUS) { | |
2503 | /* link stays up, nothing more to do */ | |
2504 | break; | |
2505 | } else { /* link going down */ | |
2506 | slave->link = BOND_LINK_FAIL; | |
2507 | slave->delay = bond->params.downdelay; | |
2508 | ||
2509 | if (slave->link_failure_count < UINT_MAX) { | |
2510 | slave->link_failure_count++; | |
2511 | } | |
2512 | ||
2513 | if (bond->params.downdelay) { | |
2514 | printk(KERN_INFO DRV_NAME | |
2515 | ": %s: link status down for %s " | |
2516 | "interface %s, disabling it in " | |
2517 | "%d ms.\n", | |
2518 | bond_dev->name, | |
2519 | IS_UP(slave_dev) | |
2520 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2521 | ? ((slave == oldcurrent) | |
2522 | ? "active " : "backup ") | |
2523 | : "") | |
2524 | : "idle ", | |
2525 | slave_dev->name, | |
2526 | bond->params.downdelay * bond->params.miimon); | |
2527 | } | |
2528 | } | |
2529 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2530 | ensure proper action to be taken | |
2531 | */ | |
2532 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2533 | if (link_state != BMSR_LSTATUS) { | |
2534 | /* link stays down */ | |
2535 | if (slave->delay <= 0) { | |
2536 | /* link down for too long time */ | |
2537 | slave->link = BOND_LINK_DOWN; | |
2538 | ||
2539 | /* in active/backup mode, we must | |
2540 | * completely disable this interface | |
2541 | */ | |
2542 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2543 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2544 | bond_set_slave_inactive_flags(slave); | |
2545 | } | |
2546 | ||
2547 | printk(KERN_INFO DRV_NAME | |
2548 | ": %s: link status definitely " | |
2549 | "down for interface %s, " | |
2550 | "disabling it\n", | |
2551 | bond_dev->name, | |
2552 | slave_dev->name); | |
2553 | ||
2554 | /* notify ad that the link status has changed */ | |
2555 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2556 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2557 | } | |
2558 | ||
2559 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2560 | (bond->params.mode == BOND_MODE_ALB)) { | |
2561 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2562 | } | |
2563 | ||
2564 | if (slave == oldcurrent) { | |
2565 | do_failover = 1; | |
2566 | } | |
2567 | } else { | |
2568 | slave->delay--; | |
2569 | } | |
2570 | } else { | |
2571 | /* link up again */ | |
2572 | slave->link = BOND_LINK_UP; | |
2573 | slave->jiffies = jiffies; | |
2574 | printk(KERN_INFO DRV_NAME | |
2575 | ": %s: link status up again after %d " | |
2576 | "ms for interface %s.\n", | |
2577 | bond_dev->name, | |
2578 | (bond->params.downdelay - slave->delay) * bond->params.miimon, | |
2579 | slave_dev->name); | |
2580 | } | |
2581 | break; | |
2582 | case BOND_LINK_DOWN: /* the link was down */ | |
2583 | if (link_state != BMSR_LSTATUS) { | |
2584 | /* the link stays down, nothing more to do */ | |
2585 | break; | |
2586 | } else { /* link going up */ | |
2587 | slave->link = BOND_LINK_BACK; | |
2588 | slave->delay = bond->params.updelay; | |
2589 | ||
2590 | if (bond->params.updelay) { | |
2591 | /* if updelay == 0, no need to | |
2592 | advertise about a 0 ms delay */ | |
2593 | printk(KERN_INFO DRV_NAME | |
2594 | ": %s: link status up for " | |
2595 | "interface %s, enabling it " | |
2596 | "in %d ms.\n", | |
2597 | bond_dev->name, | |
2598 | slave_dev->name, | |
2599 | bond->params.updelay * bond->params.miimon); | |
2600 | } | |
2601 | } | |
2602 | /* no break ! fall through the BOND_LINK_BACK state in | |
2603 | case there's something to do. | |
2604 | */ | |
2605 | case BOND_LINK_BACK: /* the link has just come back */ | |
2606 | if (link_state != BMSR_LSTATUS) { | |
2607 | /* link down again */ | |
2608 | slave->link = BOND_LINK_DOWN; | |
2609 | ||
2610 | printk(KERN_INFO DRV_NAME | |
2611 | ": %s: link status down again after %d " | |
2612 | "ms for interface %s.\n", | |
2613 | bond_dev->name, | |
2614 | (bond->params.updelay - slave->delay) * bond->params.miimon, | |
2615 | slave_dev->name); | |
2616 | } else { | |
2617 | /* link stays up */ | |
2618 | if (slave->delay == 0) { | |
2619 | /* now the link has been up for long time enough */ | |
2620 | slave->link = BOND_LINK_UP; | |
2621 | slave->jiffies = jiffies; | |
2622 | ||
2623 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2624 | /* prevent it from being the active one */ | |
2625 | slave->state = BOND_STATE_BACKUP; | |
2626 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2627 | /* make it immediately active */ | |
2628 | slave->state = BOND_STATE_ACTIVE; | |
2629 | } else if (slave != bond->primary_slave) { | |
2630 | /* prevent it from being the active one */ | |
2631 | slave->state = BOND_STATE_BACKUP; | |
2632 | } | |
2633 | ||
2634 | printk(KERN_INFO DRV_NAME | |
2635 | ": %s: link status definitely " | |
2636 | "up for interface %s.\n", | |
2637 | bond_dev->name, | |
2638 | slave_dev->name); | |
2639 | ||
2640 | /* notify ad that the link status has changed */ | |
2641 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2642 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2643 | } | |
2644 | ||
2645 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2646 | (bond->params.mode == BOND_MODE_ALB)) { | |
2647 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2648 | } | |
2649 | ||
2650 | if ((!oldcurrent) || | |
2651 | (slave == bond->primary_slave)) { | |
2652 | do_failover = 1; | |
2653 | } | |
2654 | } else { | |
2655 | slave->delay--; | |
2656 | } | |
2657 | } | |
2658 | break; | |
2659 | default: | |
2660 | /* Should not happen */ | |
2661 | printk(KERN_ERR "bonding: Error: %s Illegal value (link=%d)\n", | |
2662 | slave->dev->name, slave->link); | |
2663 | goto out; | |
2664 | } /* end of switch (slave->link) */ | |
2665 | ||
2666 | bond_update_speed_duplex(slave); | |
2667 | ||
2668 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2669 | if (old_speed != slave->speed) { | |
2670 | bond_3ad_adapter_speed_changed(slave); | |
2671 | } | |
2672 | ||
2673 | if (old_duplex != slave->duplex) { | |
2674 | bond_3ad_adapter_duplex_changed(slave); | |
2675 | } | |
2676 | } | |
2677 | ||
2678 | } /* end of for */ | |
2679 | ||
2680 | if (do_failover) { | |
2681 | write_lock(&bond->curr_slave_lock); | |
2682 | ||
2683 | bond_select_active_slave(bond); | |
2684 | ||
2685 | if (oldcurrent && !bond->curr_active_slave) { | |
2686 | printk(KERN_INFO DRV_NAME | |
2687 | ": %s: now running without any active " | |
2688 | "interface !\n", | |
2689 | bond_dev->name); | |
2690 | } | |
2691 | ||
2692 | write_unlock(&bond->curr_slave_lock); | |
2693 | } | |
2694 | ||
2695 | re_arm: | |
2696 | if (bond->params.miimon) { | |
2697 | mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); | |
2698 | } | |
2699 | out: | |
2700 | read_unlock(&bond->lock); | |
2701 | } | |
2702 | ||
c3ade5ca JV |
2703 | |
2704 | static u32 bond_glean_dev_ip(struct net_device *dev) | |
2705 | { | |
2706 | struct in_device *idev; | |
2707 | struct in_ifaddr *ifa; | |
2708 | u32 addr = 0; | |
2709 | ||
2710 | if (!dev) | |
2711 | return 0; | |
2712 | ||
2713 | rcu_read_lock(); | |
2714 | idev = __in_dev_get(dev); | |
2715 | if (!idev) | |
2716 | goto out; | |
2717 | ||
2718 | ifa = idev->ifa_list; | |
2719 | if (!ifa) | |
2720 | goto out; | |
2721 | ||
2722 | addr = ifa->ifa_local; | |
2723 | out: | |
2724 | rcu_read_unlock(); | |
2725 | return addr; | |
2726 | } | |
2727 | ||
2728 | static int bond_has_ip(struct bonding *bond) | |
2729 | { | |
2730 | struct vlan_entry *vlan, *vlan_next; | |
2731 | ||
2732 | if (bond->master_ip) | |
2733 | return 1; | |
2734 | ||
2735 | if (list_empty(&bond->vlan_list)) | |
2736 | return 0; | |
2737 | ||
2738 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2739 | vlan_list) { | |
2740 | if (vlan->vlan_ip) | |
2741 | return 1; | |
2742 | } | |
2743 | ||
2744 | return 0; | |
2745 | } | |
2746 | ||
2747 | /* | |
2748 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2749 | * switches in VLAN mode (especially if ports are configured as | |
2750 | * "native" to a VLAN) might not pass non-tagged frames. | |
2751 | */ | |
2752 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id) | |
2753 | { | |
2754 | struct sk_buff *skb; | |
2755 | ||
2756 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2757 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2758 | ||
2759 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2760 | NULL, slave_dev->dev_addr, NULL); | |
2761 | ||
2762 | if (!skb) { | |
2763 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2764 | return; | |
2765 | } | |
2766 | if (vlan_id) { | |
2767 | skb = vlan_put_tag(skb, vlan_id); | |
2768 | if (!skb) { | |
2769 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2770 | return; | |
2771 | } | |
2772 | } | |
2773 | arp_xmit(skb); | |
2774 | } | |
2775 | ||
2776 | ||
1da177e4 LT |
2777 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2778 | { | |
c3ade5ca | 2779 | int i, vlan_id, rv; |
1da177e4 | 2780 | u32 *targets = bond->params.arp_targets; |
c3ade5ca JV |
2781 | struct vlan_entry *vlan, *vlan_next; |
2782 | struct net_device *vlan_dev; | |
2783 | struct flowi fl; | |
2784 | struct rtable *rt; | |
1da177e4 LT |
2785 | |
2786 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
c3ade5ca JV |
2787 | dprintk("basa: target %x\n", targets[i]); |
2788 | if (list_empty(&bond->vlan_list)) { | |
2789 | dprintk("basa: empty vlan: arp_send\n"); | |
2790 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2791 | bond->master_ip, 0); | |
2792 | continue; | |
2793 | } | |
2794 | ||
2795 | /* | |
2796 | * If VLANs are configured, we do a route lookup to | |
2797 | * determine which VLAN interface would be used, so we | |
2798 | * can tag the ARP with the proper VLAN tag. | |
2799 | */ | |
2800 | memset(&fl, 0, sizeof(fl)); | |
2801 | fl.fl4_dst = targets[i]; | |
2802 | fl.fl4_tos = RTO_ONLINK; | |
2803 | ||
2804 | rv = ip_route_output_key(&rt, &fl); | |
2805 | if (rv) { | |
2806 | if (net_ratelimit()) { | |
2807 | printk(KERN_WARNING DRV_NAME | |
2808 | ": %s: no route to arp_ip_target %u.%u.%u.%u\n", | |
2809 | bond->dev->name, NIPQUAD(fl.fl4_dst)); | |
2810 | } | |
2811 | continue; | |
2812 | } | |
2813 | ||
2814 | /* | |
2815 | * This target is not on a VLAN | |
2816 | */ | |
2817 | if (rt->u.dst.dev == bond->dev) { | |
2818 | dprintk("basa: rtdev == bond->dev: arp_send\n"); | |
2819 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2820 | bond->master_ip, 0); | |
2821 | continue; | |
2822 | } | |
2823 | ||
2824 | vlan_id = 0; | |
2825 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2826 | vlan_list) { | |
2827 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2828 | if (vlan_dev == rt->u.dst.dev) { | |
2829 | vlan_id = vlan->vlan_id; | |
2830 | dprintk("basa: vlan match on %s %d\n", | |
2831 | vlan_dev->name, vlan_id); | |
2832 | break; | |
2833 | } | |
2834 | } | |
2835 | ||
2836 | if (vlan_id) { | |
2837 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2838 | vlan->vlan_ip, vlan_id); | |
2839 | continue; | |
2840 | } | |
2841 | ||
2842 | if (net_ratelimit()) { | |
2843 | printk(KERN_WARNING DRV_NAME | |
2844 | ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n", | |
2845 | bond->dev->name, NIPQUAD(fl.fl4_dst), | |
2846 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
2847 | } | |
2848 | } | |
2849 | } | |
2850 | ||
2851 | /* | |
2852 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2853 | * for each VLAN above us. | |
2854 | */ | |
2855 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2856 | { | |
2857 | struct slave *slave = bond->curr_active_slave; | |
2858 | struct vlan_entry *vlan; | |
2859 | struct net_device *vlan_dev; | |
2860 | ||
2861 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2862 | slave ? slave->dev->name : "NULL"); | |
2863 | if (!slave) | |
2864 | return; | |
2865 | ||
2866 | if (bond->master_ip) { | |
2867 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
2868 | bond->master_ip, 0); | |
2869 | } | |
2870 | ||
2871 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
2872 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2873 | if (vlan->vlan_ip) { | |
2874 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2875 | vlan->vlan_ip, vlan->vlan_id); | |
2876 | } | |
1da177e4 LT |
2877 | } |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * this function is called regularly to monitor each slave's link | |
2882 | * ensuring that traffic is being sent and received when arp monitoring | |
2883 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2884 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2885 | * arp monitoring in active backup mode. | |
2886 | */ | |
2887 | static void bond_loadbalance_arp_mon(struct net_device *bond_dev) | |
2888 | { | |
2889 | struct bonding *bond = bond_dev->priv; | |
2890 | struct slave *slave, *oldcurrent; | |
2891 | int do_failover = 0; | |
2892 | int delta_in_ticks; | |
2893 | int i; | |
2894 | ||
2895 | read_lock(&bond->lock); | |
2896 | ||
2897 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2898 | ||
2899 | if (bond->kill_timers) { | |
2900 | goto out; | |
2901 | } | |
2902 | ||
2903 | if (bond->slave_cnt == 0) { | |
2904 | goto re_arm; | |
2905 | } | |
2906 | ||
2907 | read_lock(&bond->curr_slave_lock); | |
2908 | oldcurrent = bond->curr_active_slave; | |
2909 | read_unlock(&bond->curr_slave_lock); | |
2910 | ||
2911 | /* see if any of the previous devices are up now (i.e. they have | |
2912 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2913 | * the picture unless it is null. also, slave->jiffies is not needed | |
2914 | * here because we send an arp on each slave and give a slave as | |
2915 | * long as it needs to get the tx/rx within the delta. | |
2916 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2917 | * so it can wait | |
2918 | */ | |
2919 | bond_for_each_slave(bond, slave, i) { | |
2920 | if (slave->link != BOND_LINK_UP) { | |
2921 | if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && | |
2922 | ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { | |
2923 | ||
2924 | slave->link = BOND_LINK_UP; | |
2925 | slave->state = BOND_STATE_ACTIVE; | |
2926 | ||
2927 | /* primary_slave has no meaning in round-robin | |
2928 | * mode. the window of a slave being up and | |
2929 | * curr_active_slave being null after enslaving | |
2930 | * is closed. | |
2931 | */ | |
2932 | if (!oldcurrent) { | |
2933 | printk(KERN_INFO DRV_NAME | |
2934 | ": %s: link status definitely " | |
2935 | "up for interface %s, ", | |
2936 | bond_dev->name, | |
2937 | slave->dev->name); | |
2938 | do_failover = 1; | |
2939 | } else { | |
2940 | printk(KERN_INFO DRV_NAME | |
2941 | ": %s: interface %s is now up\n", | |
2942 | bond_dev->name, | |
2943 | slave->dev->name); | |
2944 | } | |
2945 | } | |
2946 | } else { | |
2947 | /* slave->link == BOND_LINK_UP */ | |
2948 | ||
2949 | /* not all switches will respond to an arp request | |
2950 | * when the source ip is 0, so don't take the link down | |
2951 | * if we don't know our ip yet | |
2952 | */ | |
2953 | if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2954 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
c3ade5ca | 2955 | bond_has_ip(bond))) { |
1da177e4 LT |
2956 | |
2957 | slave->link = BOND_LINK_DOWN; | |
2958 | slave->state = BOND_STATE_BACKUP; | |
2959 | ||
2960 | if (slave->link_failure_count < UINT_MAX) { | |
2961 | slave->link_failure_count++; | |
2962 | } | |
2963 | ||
2964 | printk(KERN_INFO DRV_NAME | |
2965 | ": %s: interface %s is now down.\n", | |
2966 | bond_dev->name, | |
2967 | slave->dev->name); | |
2968 | ||
2969 | if (slave == oldcurrent) { | |
2970 | do_failover = 1; | |
2971 | } | |
2972 | } | |
2973 | } | |
2974 | ||
2975 | /* note: if switch is in round-robin mode, all links | |
2976 | * must tx arp to ensure all links rx an arp - otherwise | |
2977 | * links may oscillate or not come up at all; if switch is | |
2978 | * in something like xor mode, there is nothing we can | |
2979 | * do - all replies will be rx'ed on same link causing slaves | |
2980 | * to be unstable during low/no traffic periods | |
2981 | */ | |
2982 | if (IS_UP(slave->dev)) { | |
2983 | bond_arp_send_all(bond, slave); | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | if (do_failover) { | |
2988 | write_lock(&bond->curr_slave_lock); | |
2989 | ||
2990 | bond_select_active_slave(bond); | |
2991 | ||
2992 | if (oldcurrent && !bond->curr_active_slave) { | |
2993 | printk(KERN_INFO DRV_NAME | |
2994 | ": %s: now running without any active " | |
2995 | "interface !\n", | |
2996 | bond_dev->name); | |
2997 | } | |
2998 | ||
2999 | write_unlock(&bond->curr_slave_lock); | |
3000 | } | |
3001 | ||
3002 | re_arm: | |
3003 | if (bond->params.arp_interval) { | |
3004 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
3005 | } | |
3006 | out: | |
3007 | read_unlock(&bond->lock); | |
3008 | } | |
3009 | ||
3010 | /* | |
3011 | * When using arp monitoring in active-backup mode, this function is | |
3012 | * called to determine if any backup slaves have went down or a new | |
3013 | * current slave needs to be found. | |
3014 | * The backup slaves never generate traffic, they are considered up by merely | |
3015 | * receiving traffic. If the current slave goes down, each backup slave will | |
3016 | * be given the opportunity to tx/rx an arp before being taken down - this | |
3017 | * prevents all slaves from being taken down due to the current slave not | |
3018 | * sending any traffic for the backups to receive. The arps are not necessarily | |
3019 | * necessary, any tx and rx traffic will keep the current slave up. While any | |
3020 | * rx traffic will keep the backup slaves up, the current slave is responsible | |
3021 | * for generating traffic to keep them up regardless of any other traffic they | |
3022 | * may have received. | |
3023 | * see loadbalance_arp_monitor for arp monitoring in load balancing mode | |
3024 | */ | |
3025 | static void bond_activebackup_arp_mon(struct net_device *bond_dev) | |
3026 | { | |
3027 | struct bonding *bond = bond_dev->priv; | |
3028 | struct slave *slave; | |
3029 | int delta_in_ticks; | |
3030 | int i; | |
3031 | ||
3032 | read_lock(&bond->lock); | |
3033 | ||
3034 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
3035 | ||
3036 | if (bond->kill_timers) { | |
3037 | goto out; | |
3038 | } | |
3039 | ||
3040 | if (bond->slave_cnt == 0) { | |
3041 | goto re_arm; | |
3042 | } | |
3043 | ||
3044 | /* determine if any slave has come up or any backup slave has | |
3045 | * gone down | |
3046 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
3047 | * so it can wait | |
3048 | */ | |
3049 | bond_for_each_slave(bond, slave, i) { | |
3050 | if (slave->link != BOND_LINK_UP) { | |
3051 | if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) { | |
3052 | ||
3053 | slave->link = BOND_LINK_UP; | |
3054 | ||
3055 | write_lock(&bond->curr_slave_lock); | |
3056 | ||
3057 | if ((!bond->curr_active_slave) && | |
3058 | ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { | |
3059 | bond_change_active_slave(bond, slave); | |
3060 | bond->current_arp_slave = NULL; | |
3061 | } else if (bond->curr_active_slave != slave) { | |
3062 | /* this slave has just come up but we | |
3063 | * already have a current slave; this | |
3064 | * can also happen if bond_enslave adds | |
3065 | * a new slave that is up while we are | |
3066 | * searching for a new slave | |
3067 | */ | |
3068 | bond_set_slave_inactive_flags(slave); | |
3069 | bond->current_arp_slave = NULL; | |
3070 | } | |
3071 | ||
3072 | if (slave == bond->curr_active_slave) { | |
3073 | printk(KERN_INFO DRV_NAME | |
3074 | ": %s: %s is up and now the " | |
3075 | "active interface\n", | |
3076 | bond_dev->name, | |
3077 | slave->dev->name); | |
3078 | } else { | |
3079 | printk(KERN_INFO DRV_NAME | |
3080 | ": %s: backup interface %s is " | |
3081 | "now up\n", | |
3082 | bond_dev->name, | |
3083 | slave->dev->name); | |
3084 | } | |
3085 | ||
3086 | write_unlock(&bond->curr_slave_lock); | |
3087 | } | |
3088 | } else { | |
3089 | read_lock(&bond->curr_slave_lock); | |
3090 | ||
3091 | if ((slave != bond->curr_active_slave) && | |
3092 | (!bond->current_arp_slave) && | |
3093 | (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) && | |
c3ade5ca | 3094 | bond_has_ip(bond))) { |
1da177e4 LT |
3095 | /* a backup slave has gone down; three times |
3096 | * the delta allows the current slave to be | |
3097 | * taken out before the backup slave. | |
3098 | * note: a non-null current_arp_slave indicates | |
3099 | * the curr_active_slave went down and we are | |
3100 | * searching for a new one; under this | |
3101 | * condition we only take the curr_active_slave | |
3102 | * down - this gives each slave a chance to | |
3103 | * tx/rx traffic before being taken out | |
3104 | */ | |
3105 | ||
3106 | read_unlock(&bond->curr_slave_lock); | |
3107 | ||
3108 | slave->link = BOND_LINK_DOWN; | |
3109 | ||
3110 | if (slave->link_failure_count < UINT_MAX) { | |
3111 | slave->link_failure_count++; | |
3112 | } | |
3113 | ||
3114 | bond_set_slave_inactive_flags(slave); | |
3115 | ||
3116 | printk(KERN_INFO DRV_NAME | |
3117 | ": %s: backup interface %s is now down\n", | |
3118 | bond_dev->name, | |
3119 | slave->dev->name); | |
3120 | } else { | |
3121 | read_unlock(&bond->curr_slave_lock); | |
3122 | } | |
3123 | } | |
3124 | } | |
3125 | ||
3126 | read_lock(&bond->curr_slave_lock); | |
3127 | slave = bond->curr_active_slave; | |
3128 | read_unlock(&bond->curr_slave_lock); | |
3129 | ||
3130 | if (slave) { | |
3131 | /* if we have sent traffic in the past 2*arp_intervals but | |
3132 | * haven't xmit and rx traffic in that time interval, select | |
3133 | * a different slave. slave->jiffies is only updated when | |
3134 | * a slave first becomes the curr_active_slave - not necessarily | |
3135 | * after every arp; this ensures the slave has a full 2*delta | |
3136 | * before being taken out. if a primary is being used, check | |
3137 | * if it is up and needs to take over as the curr_active_slave | |
3138 | */ | |
3139 | if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
c3ade5ca JV |
3140 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && |
3141 | bond_has_ip(bond))) && | |
1da177e4 LT |
3142 | ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { |
3143 | ||
3144 | slave->link = BOND_LINK_DOWN; | |
3145 | ||
3146 | if (slave->link_failure_count < UINT_MAX) { | |
3147 | slave->link_failure_count++; | |
3148 | } | |
3149 | ||
3150 | printk(KERN_INFO DRV_NAME | |
3151 | ": %s: link status down for active interface " | |
3152 | "%s, disabling it\n", | |
3153 | bond_dev->name, | |
3154 | slave->dev->name); | |
3155 | ||
3156 | write_lock(&bond->curr_slave_lock); | |
3157 | ||
3158 | bond_select_active_slave(bond); | |
3159 | slave = bond->curr_active_slave; | |
3160 | ||
3161 | write_unlock(&bond->curr_slave_lock); | |
3162 | ||
3163 | bond->current_arp_slave = slave; | |
3164 | ||
3165 | if (slave) { | |
3166 | slave->jiffies = jiffies; | |
3167 | } | |
3168 | } else if ((bond->primary_slave) && | |
3169 | (bond->primary_slave != slave) && | |
3170 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3171 | /* at this point, slave is the curr_active_slave */ | |
3172 | printk(KERN_INFO DRV_NAME | |
3173 | ": %s: changing from interface %s to primary " | |
3174 | "interface %s\n", | |
3175 | bond_dev->name, | |
3176 | slave->dev->name, | |
3177 | bond->primary_slave->dev->name); | |
3178 | ||
3179 | /* primary is up so switch to it */ | |
3180 | write_lock(&bond->curr_slave_lock); | |
3181 | bond_change_active_slave(bond, bond->primary_slave); | |
3182 | write_unlock(&bond->curr_slave_lock); | |
3183 | ||
3184 | slave = bond->primary_slave; | |
3185 | slave->jiffies = jiffies; | |
3186 | } else { | |
3187 | bond->current_arp_slave = NULL; | |
3188 | } | |
3189 | ||
3190 | /* the current slave must tx an arp to ensure backup slaves | |
3191 | * rx traffic | |
3192 | */ | |
c3ade5ca | 3193 | if (slave && bond_has_ip(bond)) { |
1da177e4 LT |
3194 | bond_arp_send_all(bond, slave); |
3195 | } | |
3196 | } | |
3197 | ||
3198 | /* if we don't have a curr_active_slave, search for the next available | |
3199 | * backup slave from the current_arp_slave and make it the candidate | |
3200 | * for becoming the curr_active_slave | |
3201 | */ | |
3202 | if (!slave) { | |
3203 | if (!bond->current_arp_slave) { | |
3204 | bond->current_arp_slave = bond->first_slave; | |
3205 | } | |
3206 | ||
3207 | if (bond->current_arp_slave) { | |
3208 | bond_set_slave_inactive_flags(bond->current_arp_slave); | |
3209 | ||
3210 | /* search for next candidate */ | |
2f872f04 | 3211 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { |
1da177e4 LT |
3212 | if (IS_UP(slave->dev)) { |
3213 | slave->link = BOND_LINK_BACK; | |
3214 | bond_set_slave_active_flags(slave); | |
3215 | bond_arp_send_all(bond, slave); | |
3216 | slave->jiffies = jiffies; | |
3217 | bond->current_arp_slave = slave; | |
3218 | break; | |
3219 | } | |
3220 | ||
3221 | /* if the link state is up at this point, we | |
3222 | * mark it down - this can happen if we have | |
3223 | * simultaneous link failures and | |
3224 | * reselect_active_interface doesn't make this | |
3225 | * one the current slave so it is still marked | |
3226 | * up when it is actually down | |
3227 | */ | |
3228 | if (slave->link == BOND_LINK_UP) { | |
3229 | slave->link = BOND_LINK_DOWN; | |
3230 | if (slave->link_failure_count < UINT_MAX) { | |
3231 | slave->link_failure_count++; | |
3232 | } | |
3233 | ||
3234 | bond_set_slave_inactive_flags(slave); | |
3235 | ||
3236 | printk(KERN_INFO DRV_NAME | |
3237 | ": %s: backup interface %s is " | |
3238 | "now down.\n", | |
3239 | bond_dev->name, | |
3240 | slave->dev->name); | |
3241 | } | |
3242 | } | |
3243 | } | |
3244 | } | |
3245 | ||
3246 | re_arm: | |
3247 | if (bond->params.arp_interval) { | |
3248 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
3249 | } | |
3250 | out: | |
3251 | read_unlock(&bond->lock); | |
3252 | } | |
3253 | ||
3254 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3255 | ||
3256 | #ifdef CONFIG_PROC_FS | |
3257 | ||
3258 | #define SEQ_START_TOKEN ((void *)1) | |
3259 | ||
3260 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) | |
3261 | { | |
3262 | struct bonding *bond = seq->private; | |
3263 | loff_t off = 0; | |
3264 | struct slave *slave; | |
3265 | int i; | |
3266 | ||
3267 | /* make sure the bond won't be taken away */ | |
3268 | read_lock(&dev_base_lock); | |
3269 | read_lock_bh(&bond->lock); | |
3270 | ||
3271 | if (*pos == 0) { | |
3272 | return SEQ_START_TOKEN; | |
3273 | } | |
3274 | ||
3275 | bond_for_each_slave(bond, slave, i) { | |
3276 | if (++off == *pos) { | |
3277 | return slave; | |
3278 | } | |
3279 | } | |
3280 | ||
3281 | return NULL; | |
3282 | } | |
3283 | ||
3284 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3285 | { | |
3286 | struct bonding *bond = seq->private; | |
3287 | struct slave *slave = v; | |
3288 | ||
3289 | ++*pos; | |
3290 | if (v == SEQ_START_TOKEN) { | |
3291 | return bond->first_slave; | |
3292 | } | |
3293 | ||
3294 | slave = slave->next; | |
3295 | ||
3296 | return (slave == bond->first_slave) ? NULL : slave; | |
3297 | } | |
3298 | ||
3299 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
3300 | { | |
3301 | struct bonding *bond = seq->private; | |
3302 | ||
3303 | read_unlock_bh(&bond->lock); | |
3304 | read_unlock(&dev_base_lock); | |
3305 | } | |
3306 | ||
3307 | static void bond_info_show_master(struct seq_file *seq) | |
3308 | { | |
3309 | struct bonding *bond = seq->private; | |
3310 | struct slave *curr; | |
3311 | ||
3312 | read_lock(&bond->curr_slave_lock); | |
3313 | curr = bond->curr_active_slave; | |
3314 | read_unlock(&bond->curr_slave_lock); | |
3315 | ||
3316 | seq_printf(seq, "Bonding Mode: %s\n", | |
3317 | bond_mode_name(bond->params.mode)); | |
3318 | ||
3319 | if (USES_PRIMARY(bond->params.mode)) { | |
3320 | seq_printf(seq, "Primary Slave: %s\n", | |
3321 | (bond->params.primary[0]) ? | |
3322 | bond->params.primary : "None"); | |
3323 | ||
3324 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3325 | (curr) ? curr->dev->name : "None"); | |
3326 | } | |
3327 | ||
3328 | seq_printf(seq, "MII Status: %s\n", (curr) ? "up" : "down"); | |
3329 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); | |
3330 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3331 | bond->params.updelay * bond->params.miimon); | |
3332 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3333 | bond->params.downdelay * bond->params.miimon); | |
3334 | ||
3335 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3336 | struct ad_info ad_info; | |
3337 | ||
3338 | seq_puts(seq, "\n802.3ad info\n"); | |
3339 | seq_printf(seq, "LACP rate: %s\n", | |
3340 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
3341 | ||
3342 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3343 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3344 | bond->dev->name); | |
3345 | } else { | |
3346 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3347 | ||
3348 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3349 | ad_info.aggregator_id); | |
3350 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3351 | ad_info.ports); | |
3352 | seq_printf(seq, "\tActor Key: %d\n", | |
3353 | ad_info.actor_key); | |
3354 | seq_printf(seq, "\tPartner Key: %d\n", | |
3355 | ad_info.partner_key); | |
3356 | seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3357 | ad_info.partner_system[0], | |
3358 | ad_info.partner_system[1], | |
3359 | ad_info.partner_system[2], | |
3360 | ad_info.partner_system[3], | |
3361 | ad_info.partner_system[4], | |
3362 | ad_info.partner_system[5]); | |
3363 | } | |
3364 | } | |
3365 | } | |
3366 | ||
3367 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3368 | { | |
3369 | struct bonding *bond = seq->private; | |
3370 | ||
3371 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3372 | seq_printf(seq, "MII Status: %s\n", | |
3373 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
3374 | seq_printf(seq, "Link Failure Count: %d\n", | |
3375 | slave->link_failure_count); | |
3376 | ||
3377 | if (app_abi_ver >= 1) { | |
3378 | seq_printf(seq, | |
3379 | "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3380 | slave->perm_hwaddr[0], | |
3381 | slave->perm_hwaddr[1], | |
3382 | slave->perm_hwaddr[2], | |
3383 | slave->perm_hwaddr[3], | |
3384 | slave->perm_hwaddr[4], | |
3385 | slave->perm_hwaddr[5]); | |
3386 | } | |
3387 | ||
3388 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3389 | const struct aggregator *agg | |
3390 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3391 | ||
3392 | if (agg) { | |
3393 | seq_printf(seq, "Aggregator ID: %d\n", | |
3394 | agg->aggregator_identifier); | |
3395 | } else { | |
3396 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3397 | } | |
3398 | } | |
3399 | } | |
3400 | ||
3401 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3402 | { | |
3403 | if (v == SEQ_START_TOKEN) { | |
3404 | seq_printf(seq, "%s\n", version); | |
3405 | bond_info_show_master(seq); | |
3406 | } else { | |
3407 | bond_info_show_slave(seq, v); | |
3408 | } | |
3409 | ||
3410 | return 0; | |
3411 | } | |
3412 | ||
3413 | static struct seq_operations bond_info_seq_ops = { | |
3414 | .start = bond_info_seq_start, | |
3415 | .next = bond_info_seq_next, | |
3416 | .stop = bond_info_seq_stop, | |
3417 | .show = bond_info_seq_show, | |
3418 | }; | |
3419 | ||
3420 | static int bond_info_open(struct inode *inode, struct file *file) | |
3421 | { | |
3422 | struct seq_file *seq; | |
3423 | struct proc_dir_entry *proc; | |
3424 | int res; | |
3425 | ||
3426 | res = seq_open(file, &bond_info_seq_ops); | |
3427 | if (!res) { | |
3428 | /* recover the pointer buried in proc_dir_entry data */ | |
3429 | seq = file->private_data; | |
3430 | proc = PDE(inode); | |
3431 | seq->private = proc->data; | |
3432 | } | |
3433 | ||
3434 | return res; | |
3435 | } | |
3436 | ||
3437 | static struct file_operations bond_info_fops = { | |
3438 | .owner = THIS_MODULE, | |
3439 | .open = bond_info_open, | |
3440 | .read = seq_read, | |
3441 | .llseek = seq_lseek, | |
3442 | .release = seq_release, | |
3443 | }; | |
3444 | ||
3445 | static int bond_create_proc_entry(struct bonding *bond) | |
3446 | { | |
3447 | struct net_device *bond_dev = bond->dev; | |
3448 | ||
3449 | if (bond_proc_dir) { | |
3450 | bond->proc_entry = create_proc_entry(bond_dev->name, | |
3451 | S_IRUGO, | |
3452 | bond_proc_dir); | |
3453 | if (bond->proc_entry == NULL) { | |
3454 | printk(KERN_WARNING DRV_NAME | |
3455 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3456 | DRV_NAME, bond_dev->name); | |
3457 | } else { | |
3458 | bond->proc_entry->data = bond; | |
3459 | bond->proc_entry->proc_fops = &bond_info_fops; | |
3460 | bond->proc_entry->owner = THIS_MODULE; | |
3461 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); | |
3462 | } | |
3463 | } | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static void bond_remove_proc_entry(struct bonding *bond) | |
3469 | { | |
3470 | if (bond_proc_dir && bond->proc_entry) { | |
3471 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3472 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3473 | bond->proc_entry = NULL; | |
3474 | } | |
3475 | } | |
3476 | ||
3477 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3478 | * Caller must hold rtnl_lock. | |
3479 | */ | |
3480 | static void bond_create_proc_dir(void) | |
3481 | { | |
3482 | int len = strlen(DRV_NAME); | |
3483 | ||
3484 | for (bond_proc_dir = proc_net->subdir; bond_proc_dir; | |
3485 | bond_proc_dir = bond_proc_dir->next) { | |
3486 | if ((bond_proc_dir->namelen == len) && | |
3487 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3488 | break; | |
3489 | } | |
3490 | } | |
3491 | ||
3492 | if (!bond_proc_dir) { | |
3493 | bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); | |
3494 | if (bond_proc_dir) { | |
3495 | bond_proc_dir->owner = THIS_MODULE; | |
3496 | } else { | |
3497 | printk(KERN_WARNING DRV_NAME | |
3498 | ": Warning: cannot create /proc/net/%s\n", | |
3499 | DRV_NAME); | |
3500 | } | |
3501 | } | |
3502 | } | |
3503 | ||
3504 | /* Destroy the bonding directory under /proc/net, if empty. | |
3505 | * Caller must hold rtnl_lock. | |
3506 | */ | |
3507 | static void bond_destroy_proc_dir(void) | |
3508 | { | |
3509 | struct proc_dir_entry *de; | |
3510 | ||
3511 | if (!bond_proc_dir) { | |
3512 | return; | |
3513 | } | |
3514 | ||
3515 | /* verify that the /proc dir is empty */ | |
3516 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3517 | /* ignore . and .. */ | |
3518 | if (*(de->name) != '.') { | |
3519 | break; | |
3520 | } | |
3521 | } | |
3522 | ||
3523 | if (de) { | |
3524 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3525 | bond_proc_dir->owner = NULL; | |
3526 | } | |
3527 | } else { | |
3528 | remove_proc_entry(DRV_NAME, proc_net); | |
3529 | bond_proc_dir = NULL; | |
3530 | } | |
3531 | } | |
3532 | #endif /* CONFIG_PROC_FS */ | |
3533 | ||
3534 | /*-------------------------- netdev event handling --------------------------*/ | |
3535 | ||
3536 | /* | |
3537 | * Change device name | |
3538 | */ | |
3539 | static int bond_event_changename(struct bonding *bond) | |
3540 | { | |
3541 | #ifdef CONFIG_PROC_FS | |
3542 | bond_remove_proc_entry(bond); | |
3543 | bond_create_proc_entry(bond); | |
3544 | #endif | |
3545 | ||
3546 | return NOTIFY_DONE; | |
3547 | } | |
3548 | ||
3549 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3550 | { | |
3551 | struct bonding *event_bond = bond_dev->priv; | |
3552 | ||
3553 | switch (event) { | |
3554 | case NETDEV_CHANGENAME: | |
3555 | return bond_event_changename(event_bond); | |
3556 | case NETDEV_UNREGISTER: | |
3557 | /* | |
3558 | * TODO: remove a bond from the list? | |
3559 | */ | |
3560 | break; | |
3561 | default: | |
3562 | break; | |
3563 | } | |
3564 | ||
3565 | return NOTIFY_DONE; | |
3566 | } | |
3567 | ||
3568 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3569 | { | |
3570 | struct net_device *bond_dev = slave_dev->master; | |
3571 | ||
3572 | switch (event) { | |
3573 | case NETDEV_UNREGISTER: | |
3574 | if (bond_dev) { | |
3575 | bond_release(bond_dev, slave_dev); | |
3576 | } | |
3577 | break; | |
3578 | case NETDEV_CHANGE: | |
3579 | /* | |
3580 | * TODO: is this what we get if somebody | |
3581 | * sets up a hierarchical bond, then rmmod's | |
3582 | * one of the slave bonding devices? | |
3583 | */ | |
3584 | break; | |
3585 | case NETDEV_DOWN: | |
3586 | /* | |
3587 | * ... Or is it this? | |
3588 | */ | |
3589 | break; | |
3590 | case NETDEV_CHANGEMTU: | |
3591 | /* | |
3592 | * TODO: Should slaves be allowed to | |
3593 | * independently alter their MTU? For | |
3594 | * an active-backup bond, slaves need | |
3595 | * not be the same type of device, so | |
3596 | * MTUs may vary. For other modes, | |
3597 | * slaves arguably should have the | |
3598 | * same MTUs. To do this, we'd need to | |
3599 | * take over the slave's change_mtu | |
3600 | * function for the duration of their | |
3601 | * servitude. | |
3602 | */ | |
3603 | break; | |
3604 | case NETDEV_CHANGENAME: | |
3605 | /* | |
3606 | * TODO: handle changing the primary's name | |
3607 | */ | |
3608 | break; | |
3609 | default: | |
3610 | break; | |
3611 | } | |
3612 | ||
3613 | return NOTIFY_DONE; | |
3614 | } | |
3615 | ||
3616 | /* | |
3617 | * bond_netdev_event: handle netdev notifier chain events. | |
3618 | * | |
3619 | * This function receives events for the netdev chain. The caller (an | |
3620 | * ioctl handler calling notifier_call_chain) holds the necessary | |
3621 | * locks for us to safely manipulate the slave devices (RTNL lock, | |
3622 | * dev_probe_lock). | |
3623 | */ | |
3624 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3625 | { | |
3626 | struct net_device *event_dev = (struct net_device *)ptr; | |
3627 | ||
3628 | dprintk("event_dev: %s, event: %lx\n", | |
3629 | (event_dev ? event_dev->name : "None"), | |
3630 | event); | |
3631 | ||
3632 | if (event_dev->flags & IFF_MASTER) { | |
3633 | dprintk("IFF_MASTER\n"); | |
3634 | return bond_master_netdev_event(event, event_dev); | |
3635 | } | |
3636 | ||
3637 | if (event_dev->flags & IFF_SLAVE) { | |
3638 | dprintk("IFF_SLAVE\n"); | |
3639 | return bond_slave_netdev_event(event, event_dev); | |
3640 | } | |
3641 | ||
3642 | return NOTIFY_DONE; | |
3643 | } | |
3644 | ||
c3ade5ca JV |
3645 | /* |
3646 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3647 | * | |
3648 | * We keep track of device IPs primarily to use as source addresses in | |
3649 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3650 | * | |
3651 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3652 | */ | |
3653 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3654 | { | |
3655 | struct in_ifaddr *ifa = ptr; | |
3656 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
3657 | struct bonding *bond, *bond_next; | |
3658 | struct vlan_entry *vlan, *vlan_next; | |
3659 | ||
3660 | list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) { | |
3661 | if (bond->dev == event_dev) { | |
3662 | switch (event) { | |
3663 | case NETDEV_UP: | |
3664 | bond->master_ip = ifa->ifa_local; | |
3665 | return NOTIFY_OK; | |
3666 | case NETDEV_DOWN: | |
3667 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3668 | return NOTIFY_OK; | |
3669 | default: | |
3670 | return NOTIFY_DONE; | |
3671 | } | |
3672 | } | |
3673 | ||
3674 | if (list_empty(&bond->vlan_list)) | |
3675 | continue; | |
3676 | ||
3677 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
3678 | vlan_list) { | |
3679 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
3680 | if (vlan_dev == event_dev) { | |
3681 | switch (event) { | |
3682 | case NETDEV_UP: | |
3683 | vlan->vlan_ip = ifa->ifa_local; | |
3684 | return NOTIFY_OK; | |
3685 | case NETDEV_DOWN: | |
3686 | vlan->vlan_ip = | |
3687 | bond_glean_dev_ip(vlan_dev); | |
3688 | return NOTIFY_OK; | |
3689 | default: | |
3690 | return NOTIFY_DONE; | |
3691 | } | |
3692 | } | |
3693 | } | |
3694 | } | |
3695 | return NOTIFY_DONE; | |
3696 | } | |
3697 | ||
1da177e4 LT |
3698 | static struct notifier_block bond_netdev_notifier = { |
3699 | .notifier_call = bond_netdev_event, | |
3700 | }; | |
3701 | ||
c3ade5ca JV |
3702 | static struct notifier_block bond_inetaddr_notifier = { |
3703 | .notifier_call = bond_inetaddr_event, | |
3704 | }; | |
3705 | ||
1da177e4 LT |
3706 | /*-------------------------- Packet type handling ---------------------------*/ |
3707 | ||
3708 | /* register to receive lacpdus on a bond */ | |
3709 | static void bond_register_lacpdu(struct bonding *bond) | |
3710 | { | |
3711 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3712 | ||
3713 | /* initialize packet type */ | |
3714 | pk_type->type = PKT_TYPE_LACPDU; | |
3715 | pk_type->dev = bond->dev; | |
3716 | pk_type->func = bond_3ad_lacpdu_recv; | |
3717 | ||
3718 | dev_add_pack(pk_type); | |
3719 | } | |
3720 | ||
3721 | /* unregister to receive lacpdus on a bond */ | |
3722 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3723 | { | |
3724 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3725 | } | |
3726 | ||
3727 | /*-------------------------- Device entry points ----------------------------*/ | |
3728 | ||
3729 | static int bond_open(struct net_device *bond_dev) | |
3730 | { | |
3731 | struct bonding *bond = bond_dev->priv; | |
3732 | struct timer_list *mii_timer = &bond->mii_timer; | |
3733 | struct timer_list *arp_timer = &bond->arp_timer; | |
3734 | ||
3735 | bond->kill_timers = 0; | |
3736 | ||
3737 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3738 | (bond->params.mode == BOND_MODE_ALB)) { | |
3739 | struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); | |
3740 | ||
3741 | /* bond_alb_initialize must be called before the timer | |
3742 | * is started. | |
3743 | */ | |
3744 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3745 | /* something went wrong - fail the open operation */ | |
3746 | return -1; | |
3747 | } | |
3748 | ||
3749 | init_timer(alb_timer); | |
3750 | alb_timer->expires = jiffies + 1; | |
3751 | alb_timer->data = (unsigned long)bond; | |
3752 | alb_timer->function = (void *)&bond_alb_monitor; | |
3753 | add_timer(alb_timer); | |
3754 | } | |
3755 | ||
3756 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3757 | init_timer(mii_timer); | |
3758 | mii_timer->expires = jiffies + 1; | |
3759 | mii_timer->data = (unsigned long)bond_dev; | |
3760 | mii_timer->function = (void *)&bond_mii_monitor; | |
3761 | add_timer(mii_timer); | |
3762 | } | |
3763 | ||
3764 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3765 | init_timer(arp_timer); | |
3766 | arp_timer->expires = jiffies + 1; | |
3767 | arp_timer->data = (unsigned long)bond_dev; | |
3768 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3769 | arp_timer->function = (void *)&bond_activebackup_arp_mon; | |
3770 | } else { | |
3771 | arp_timer->function = (void *)&bond_loadbalance_arp_mon; | |
3772 | } | |
3773 | add_timer(arp_timer); | |
3774 | } | |
3775 | ||
3776 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3777 | struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); | |
3778 | init_timer(ad_timer); | |
3779 | ad_timer->expires = jiffies + 1; | |
3780 | ad_timer->data = (unsigned long)bond; | |
3781 | ad_timer->function = (void *)&bond_3ad_state_machine_handler; | |
3782 | add_timer(ad_timer); | |
3783 | ||
3784 | /* register to receive LACPDUs */ | |
3785 | bond_register_lacpdu(bond); | |
3786 | } | |
3787 | ||
3788 | return 0; | |
3789 | } | |
3790 | ||
3791 | static int bond_close(struct net_device *bond_dev) | |
3792 | { | |
3793 | struct bonding *bond = bond_dev->priv; | |
3794 | ||
3795 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3796 | /* Unregister the receive of LACPDUs */ | |
3797 | bond_unregister_lacpdu(bond); | |
3798 | } | |
3799 | ||
3800 | write_lock_bh(&bond->lock); | |
3801 | ||
3802 | bond_mc_list_destroy(bond); | |
3803 | ||
3804 | /* signal timers not to re-arm */ | |
3805 | bond->kill_timers = 1; | |
3806 | ||
3807 | write_unlock_bh(&bond->lock); | |
3808 | ||
3809 | /* del_timer_sync must run without holding the bond->lock | |
3810 | * because a running timer might be trying to hold it too | |
3811 | */ | |
3812 | ||
3813 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3814 | del_timer_sync(&bond->mii_timer); | |
3815 | } | |
3816 | ||
3817 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3818 | del_timer_sync(&bond->arp_timer); | |
3819 | } | |
3820 | ||
3821 | switch (bond->params.mode) { | |
3822 | case BOND_MODE_8023AD: | |
3823 | del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); | |
3824 | break; | |
3825 | case BOND_MODE_TLB: | |
3826 | case BOND_MODE_ALB: | |
3827 | del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); | |
3828 | break; | |
3829 | default: | |
3830 | break; | |
3831 | } | |
3832 | ||
3833 | /* Release the bonded slaves */ | |
3834 | bond_release_all(bond_dev); | |
3835 | ||
3836 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3837 | (bond->params.mode == BOND_MODE_ALB)) { | |
3838 | /* Must be called only after all | |
3839 | * slaves have been released | |
3840 | */ | |
3841 | bond_alb_deinitialize(bond); | |
3842 | } | |
3843 | ||
3844 | return 0; | |
3845 | } | |
3846 | ||
3847 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3848 | { | |
3849 | struct bonding *bond = bond_dev->priv; | |
3850 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
3851 | struct slave *slave; | |
3852 | int i; | |
3853 | ||
3854 | memset(stats, 0, sizeof(struct net_device_stats)); | |
3855 | ||
3856 | read_lock_bh(&bond->lock); | |
3857 | ||
3858 | bond_for_each_slave(bond, slave, i) { | |
3859 | sstats = slave->dev->get_stats(slave->dev); | |
3860 | ||
3861 | stats->rx_packets += sstats->rx_packets; | |
3862 | stats->rx_bytes += sstats->rx_bytes; | |
3863 | stats->rx_errors += sstats->rx_errors; | |
3864 | stats->rx_dropped += sstats->rx_dropped; | |
3865 | ||
3866 | stats->tx_packets += sstats->tx_packets; | |
3867 | stats->tx_bytes += sstats->tx_bytes; | |
3868 | stats->tx_errors += sstats->tx_errors; | |
3869 | stats->tx_dropped += sstats->tx_dropped; | |
3870 | ||
3871 | stats->multicast += sstats->multicast; | |
3872 | stats->collisions += sstats->collisions; | |
3873 | ||
3874 | stats->rx_length_errors += sstats->rx_length_errors; | |
3875 | stats->rx_over_errors += sstats->rx_over_errors; | |
3876 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3877 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3878 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3879 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3880 | ||
3881 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3882 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3883 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3884 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3885 | stats->tx_window_errors += sstats->tx_window_errors; | |
3886 | } | |
3887 | ||
3888 | read_unlock_bh(&bond->lock); | |
3889 | ||
3890 | return stats; | |
3891 | } | |
3892 | ||
3893 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3894 | { | |
3895 | struct net_device *slave_dev = NULL; | |
3896 | struct ifbond k_binfo; | |
3897 | struct ifbond __user *u_binfo = NULL; | |
3898 | struct ifslave k_sinfo; | |
3899 | struct ifslave __user *u_sinfo = NULL; | |
3900 | struct mii_ioctl_data *mii = NULL; | |
3901 | int prev_abi_ver = orig_app_abi_ver; | |
3902 | int res = 0; | |
3903 | ||
3904 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3905 | bond_dev->name, cmd); | |
3906 | ||
3907 | switch (cmd) { | |
3908 | case SIOCETHTOOL: | |
3909 | return bond_ethtool_ioctl(bond_dev, ifr); | |
3910 | case SIOCGMIIPHY: | |
3911 | mii = if_mii(ifr); | |
3912 | if (!mii) { | |
3913 | return -EINVAL; | |
3914 | } | |
3915 | mii->phy_id = 0; | |
3916 | /* Fall Through */ | |
3917 | case SIOCGMIIREG: | |
3918 | /* | |
3919 | * We do this again just in case we were called by SIOCGMIIREG | |
3920 | * instead of SIOCGMIIPHY. | |
3921 | */ | |
3922 | mii = if_mii(ifr); | |
3923 | if (!mii) { | |
3924 | return -EINVAL; | |
3925 | } | |
3926 | ||
3927 | if (mii->reg_num == 1) { | |
3928 | struct bonding *bond = bond_dev->priv; | |
3929 | mii->val_out = 0; | |
3930 | read_lock_bh(&bond->lock); | |
3931 | read_lock(&bond->curr_slave_lock); | |
3932 | if (bond->curr_active_slave) { | |
3933 | mii->val_out = BMSR_LSTATUS; | |
3934 | } | |
3935 | read_unlock(&bond->curr_slave_lock); | |
3936 | read_unlock_bh(&bond->lock); | |
3937 | } | |
3938 | ||
3939 | return 0; | |
3940 | case BOND_INFO_QUERY_OLD: | |
3941 | case SIOCBONDINFOQUERY: | |
3942 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3943 | ||
3944 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3945 | return -EFAULT; | |
3946 | } | |
3947 | ||
3948 | res = bond_info_query(bond_dev, &k_binfo); | |
3949 | if (res == 0) { | |
3950 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3951 | return -EFAULT; | |
3952 | } | |
3953 | } | |
3954 | ||
3955 | return res; | |
3956 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3957 | case SIOCBONDSLAVEINFOQUERY: | |
3958 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3959 | ||
3960 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3961 | return -EFAULT; | |
3962 | } | |
3963 | ||
3964 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3965 | if (res == 0) { | |
3966 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
3967 | return -EFAULT; | |
3968 | } | |
3969 | } | |
3970 | ||
3971 | return res; | |
3972 | default: | |
3973 | /* Go on */ | |
3974 | break; | |
3975 | } | |
3976 | ||
3977 | if (!capable(CAP_NET_ADMIN)) { | |
3978 | return -EPERM; | |
3979 | } | |
3980 | ||
3981 | if (orig_app_abi_ver == -1) { | |
3982 | /* no orig_app_abi_ver was provided yet, so we'll use the | |
3983 | * current one from now on, even if it's 0 | |
3984 | */ | |
3985 | orig_app_abi_ver = app_abi_ver; | |
3986 | ||
3987 | } else if (orig_app_abi_ver != app_abi_ver) { | |
3988 | printk(KERN_ERR DRV_NAME | |
3989 | ": Error: already using ifenslave ABI version %d; to " | |
3990 | "upgrade ifenslave to version %d, you must first " | |
3991 | "reload bonding.\n", | |
3992 | orig_app_abi_ver, app_abi_ver); | |
3993 | return -EINVAL; | |
3994 | } | |
3995 | ||
3996 | slave_dev = dev_get_by_name(ifr->ifr_slave); | |
3997 | ||
3998 | dprintk("slave_dev=%p: \n", slave_dev); | |
3999 | ||
4000 | if (!slave_dev) { | |
4001 | res = -ENODEV; | |
4002 | } else { | |
4003 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
4004 | switch (cmd) { | |
4005 | case BOND_ENSLAVE_OLD: | |
4006 | case SIOCBONDENSLAVE: | |
4007 | res = bond_enslave(bond_dev, slave_dev); | |
4008 | break; | |
4009 | case BOND_RELEASE_OLD: | |
4010 | case SIOCBONDRELEASE: | |
4011 | res = bond_release(bond_dev, slave_dev); | |
4012 | break; | |
4013 | case BOND_SETHWADDR_OLD: | |
4014 | case SIOCBONDSETHWADDR: | |
4015 | res = bond_sethwaddr(bond_dev, slave_dev); | |
4016 | break; | |
4017 | case BOND_CHANGE_ACTIVE_OLD: | |
4018 | case SIOCBONDCHANGEACTIVE: | |
4019 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
4020 | break; | |
4021 | default: | |
4022 | res = -EOPNOTSUPP; | |
4023 | } | |
4024 | ||
4025 | dev_put(slave_dev); | |
4026 | } | |
4027 | ||
4028 | if (res < 0) { | |
4029 | /* The ioctl failed, so there's no point in changing the | |
4030 | * orig_app_abi_ver. We'll restore it's value just in case | |
4031 | * we've changed it earlier in this function. | |
4032 | */ | |
4033 | orig_app_abi_ver = prev_abi_ver; | |
4034 | } | |
4035 | ||
4036 | return res; | |
4037 | } | |
4038 | ||
4039 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
4040 | { | |
4041 | struct bonding *bond = bond_dev->priv; | |
4042 | struct dev_mc_list *dmi; | |
4043 | ||
4044 | write_lock_bh(&bond->lock); | |
4045 | ||
4046 | /* | |
4047 | * Do promisc before checking multicast_mode | |
4048 | */ | |
4049 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
4050 | bond_set_promiscuity(bond, 1); | |
4051 | } | |
4052 | ||
4053 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
4054 | bond_set_promiscuity(bond, -1); | |
4055 | } | |
4056 | ||
4057 | /* set allmulti flag to slaves */ | |
4058 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
4059 | bond_set_allmulti(bond, 1); | |
4060 | } | |
4061 | ||
4062 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
4063 | bond_set_allmulti(bond, -1); | |
4064 | } | |
4065 | ||
4066 | bond->flags = bond_dev->flags; | |
4067 | ||
4068 | /* looking for addresses to add to slaves' mc list */ | |
4069 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
4070 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
4071 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4072 | } | |
4073 | } | |
4074 | ||
4075 | /* looking for addresses to delete from slaves' list */ | |
4076 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
4077 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
4078 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4079 | } | |
4080 | } | |
4081 | ||
4082 | /* save master's multicast list */ | |
4083 | bond_mc_list_destroy(bond); | |
4084 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
4085 | ||
4086 | write_unlock_bh(&bond->lock); | |
4087 | } | |
4088 | ||
4089 | /* | |
4090 | * Change the MTU of all of a master's slaves to match the master | |
4091 | */ | |
4092 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4093 | { | |
4094 | struct bonding *bond = bond_dev->priv; | |
4095 | struct slave *slave, *stop_at; | |
4096 | int res = 0; | |
4097 | int i; | |
4098 | ||
4099 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
4100 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
4101 | ||
4102 | /* Can't hold bond->lock with bh disabled here since | |
4103 | * some base drivers panic. On the other hand we can't | |
4104 | * hold bond->lock without bh disabled because we'll | |
4105 | * deadlock. The only solution is to rely on the fact | |
4106 | * that we're under rtnl_lock here, and the slaves | |
4107 | * list won't change. This doesn't solve the problem | |
4108 | * of setting the slave's MTU while it is | |
4109 | * transmitting, but the assumption is that the base | |
4110 | * driver can handle that. | |
4111 | * | |
4112 | * TODO: figure out a way to safely iterate the slaves | |
4113 | * list, but without holding a lock around the actual | |
4114 | * call to the base driver. | |
4115 | */ | |
4116 | ||
4117 | bond_for_each_slave(bond, slave, i) { | |
4118 | dprintk("s %p s->p %p c_m %p\n", slave, | |
4119 | slave->prev, slave->dev->change_mtu); | |
4120 | res = dev_set_mtu(slave->dev, new_mtu); | |
4121 | ||
4122 | if (res) { | |
4123 | /* If we failed to set the slave's mtu to the new value | |
4124 | * we must abort the operation even in ACTIVE_BACKUP | |
4125 | * mode, because if we allow the backup slaves to have | |
4126 | * different mtu values than the active slave we'll | |
4127 | * need to change their mtu when doing a failover. That | |
4128 | * means changing their mtu from timer context, which | |
4129 | * is probably not a good idea. | |
4130 | */ | |
4131 | dprintk("err %d %s\n", res, slave->dev->name); | |
4132 | goto unwind; | |
4133 | } | |
4134 | } | |
4135 | ||
4136 | bond_dev->mtu = new_mtu; | |
4137 | ||
4138 | return 0; | |
4139 | ||
4140 | unwind: | |
4141 | /* unwind from head to the slave that failed */ | |
4142 | stop_at = slave; | |
4143 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4144 | int tmp_res; | |
4145 | ||
4146 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4147 | if (tmp_res) { | |
4148 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4149 | slave->dev->name); | |
4150 | } | |
4151 | } | |
4152 | ||
4153 | return res; | |
4154 | } | |
4155 | ||
4156 | /* | |
4157 | * Change HW address | |
4158 | * | |
4159 | * Note that many devices must be down to change the HW address, and | |
4160 | * downing the master releases all slaves. We can make bonds full of | |
4161 | * bonding devices to test this, however. | |
4162 | */ | |
4163 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4164 | { | |
4165 | struct bonding *bond = bond_dev->priv; | |
4166 | struct sockaddr *sa = addr, tmp_sa; | |
4167 | struct slave *slave, *stop_at; | |
4168 | int res = 0; | |
4169 | int i; | |
4170 | ||
4171 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
4172 | ||
4173 | if (!is_valid_ether_addr(sa->sa_data)) { | |
4174 | return -EADDRNOTAVAIL; | |
4175 | } | |
4176 | ||
4177 | /* Can't hold bond->lock with bh disabled here since | |
4178 | * some base drivers panic. On the other hand we can't | |
4179 | * hold bond->lock without bh disabled because we'll | |
4180 | * deadlock. The only solution is to rely on the fact | |
4181 | * that we're under rtnl_lock here, and the slaves | |
4182 | * list won't change. This doesn't solve the problem | |
4183 | * of setting the slave's hw address while it is | |
4184 | * transmitting, but the assumption is that the base | |
4185 | * driver can handle that. | |
4186 | * | |
4187 | * TODO: figure out a way to safely iterate the slaves | |
4188 | * list, but without holding a lock around the actual | |
4189 | * call to the base driver. | |
4190 | */ | |
4191 | ||
4192 | bond_for_each_slave(bond, slave, i) { | |
4193 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
4194 | ||
4195 | if (slave->dev->set_mac_address == NULL) { | |
4196 | res = -EOPNOTSUPP; | |
4197 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
4198 | goto unwind; | |
4199 | } | |
4200 | ||
4201 | res = dev_set_mac_address(slave->dev, addr); | |
4202 | if (res) { | |
4203 | /* TODO: consider downing the slave | |
4204 | * and retry ? | |
4205 | * User should expect communications | |
4206 | * breakage anyway until ARP finish | |
4207 | * updating, so... | |
4208 | */ | |
4209 | dprintk("err %d %s\n", res, slave->dev->name); | |
4210 | goto unwind; | |
4211 | } | |
4212 | } | |
4213 | ||
4214 | /* success */ | |
4215 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4216 | return 0; | |
4217 | ||
4218 | unwind: | |
4219 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4220 | tmp_sa.sa_family = bond_dev->type; | |
4221 | ||
4222 | /* unwind from head to the slave that failed */ | |
4223 | stop_at = slave; | |
4224 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4225 | int tmp_res; | |
4226 | ||
4227 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4228 | if (tmp_res) { | |
4229 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4230 | slave->dev->name); | |
4231 | } | |
4232 | } | |
4233 | ||
4234 | return res; | |
4235 | } | |
4236 | ||
4237 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4238 | { | |
4239 | struct bonding *bond = bond_dev->priv; | |
4240 | struct slave *slave, *start_at; | |
4241 | int i; | |
4242 | int res = 1; | |
4243 | ||
4244 | read_lock(&bond->lock); | |
4245 | ||
4246 | if (!BOND_IS_OK(bond)) { | |
4247 | goto out; | |
4248 | } | |
4249 | ||
4250 | read_lock(&bond->curr_slave_lock); | |
4251 | slave = start_at = bond->curr_active_slave; | |
4252 | read_unlock(&bond->curr_slave_lock); | |
4253 | ||
4254 | if (!slave) { | |
4255 | goto out; | |
4256 | } | |
4257 | ||
4258 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4259 | if (IS_UP(slave->dev) && | |
4260 | (slave->link == BOND_LINK_UP) && | |
4261 | (slave->state == BOND_STATE_ACTIVE)) { | |
4262 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4263 | ||
4264 | write_lock(&bond->curr_slave_lock); | |
4265 | bond->curr_active_slave = slave->next; | |
4266 | write_unlock(&bond->curr_slave_lock); | |
4267 | ||
4268 | break; | |
4269 | } | |
4270 | } | |
4271 | ||
4272 | ||
4273 | out: | |
4274 | if (res) { | |
4275 | /* no suitable interface, frame not sent */ | |
4276 | dev_kfree_skb(skb); | |
4277 | } | |
4278 | read_unlock(&bond->lock); | |
4279 | return 0; | |
4280 | } | |
4281 | ||
4282 | /* | |
4283 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4284 | * the bond has a usable interface. | |
4285 | */ | |
4286 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4287 | { | |
4288 | struct bonding *bond = bond_dev->priv; | |
4289 | int res = 1; | |
4290 | ||
1da177e4 LT |
4291 | read_lock(&bond->lock); |
4292 | read_lock(&bond->curr_slave_lock); | |
4293 | ||
4294 | if (!BOND_IS_OK(bond)) { | |
4295 | goto out; | |
4296 | } | |
4297 | ||
4298 | if (bond->curr_active_slave) { /* one usable interface */ | |
4299 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); | |
4300 | } | |
4301 | ||
4302 | out: | |
4303 | if (res) { | |
4304 | /* no suitable interface, frame not sent */ | |
4305 | dev_kfree_skb(skb); | |
4306 | } | |
4307 | read_unlock(&bond->curr_slave_lock); | |
4308 | read_unlock(&bond->lock); | |
4309 | return 0; | |
4310 | } | |
4311 | ||
4312 | /* | |
4313 | * in XOR mode, we determine the output device by performing xor on | |
4314 | * the source and destination hw adresses. If this device is not | |
4315 | * enabled, find the next slave following this xor slave. | |
4316 | */ | |
4317 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4318 | { | |
4319 | struct bonding *bond = bond_dev->priv; | |
4320 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
4321 | struct slave *slave, *start_at; | |
4322 | int slave_no; | |
4323 | int i; | |
4324 | int res = 1; | |
4325 | ||
4326 | read_lock(&bond->lock); | |
4327 | ||
4328 | if (!BOND_IS_OK(bond)) { | |
4329 | goto out; | |
4330 | } | |
4331 | ||
4332 | slave_no = (data->h_dest[5]^bond_dev->dev_addr[5]) % bond->slave_cnt; | |
4333 | ||
4334 | bond_for_each_slave(bond, slave, i) { | |
4335 | slave_no--; | |
4336 | if (slave_no < 0) { | |
4337 | break; | |
4338 | } | |
4339 | } | |
4340 | ||
4341 | start_at = slave; | |
4342 | ||
4343 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4344 | if (IS_UP(slave->dev) && | |
4345 | (slave->link == BOND_LINK_UP) && | |
4346 | (slave->state == BOND_STATE_ACTIVE)) { | |
4347 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4348 | break; | |
4349 | } | |
4350 | } | |
4351 | ||
4352 | out: | |
4353 | if (res) { | |
4354 | /* no suitable interface, frame not sent */ | |
4355 | dev_kfree_skb(skb); | |
4356 | } | |
4357 | read_unlock(&bond->lock); | |
4358 | return 0; | |
4359 | } | |
4360 | ||
4361 | /* | |
4362 | * in broadcast mode, we send everything to all usable interfaces. | |
4363 | */ | |
4364 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4365 | { | |
4366 | struct bonding *bond = bond_dev->priv; | |
4367 | struct slave *slave, *start_at; | |
4368 | struct net_device *tx_dev = NULL; | |
4369 | int i; | |
4370 | int res = 1; | |
4371 | ||
4372 | read_lock(&bond->lock); | |
4373 | ||
4374 | if (!BOND_IS_OK(bond)) { | |
4375 | goto out; | |
4376 | } | |
4377 | ||
4378 | read_lock(&bond->curr_slave_lock); | |
4379 | start_at = bond->curr_active_slave; | |
4380 | read_unlock(&bond->curr_slave_lock); | |
4381 | ||
4382 | if (!start_at) { | |
4383 | goto out; | |
4384 | } | |
4385 | ||
4386 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4387 | if (IS_UP(slave->dev) && | |
4388 | (slave->link == BOND_LINK_UP) && | |
4389 | (slave->state == BOND_STATE_ACTIVE)) { | |
4390 | if (tx_dev) { | |
4391 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4392 | if (!skb2) { | |
4393 | printk(KERN_ERR DRV_NAME | |
4394 | ": Error: bond_xmit_broadcast(): " | |
4395 | "skb_clone() failed\n"); | |
4396 | continue; | |
4397 | } | |
4398 | ||
4399 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4400 | if (res) { | |
4401 | dev_kfree_skb(skb2); | |
4402 | continue; | |
4403 | } | |
4404 | } | |
4405 | tx_dev = slave->dev; | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | if (tx_dev) { | |
4410 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4411 | } | |
4412 | ||
4413 | out: | |
4414 | if (res) { | |
4415 | /* no suitable interface, frame not sent */ | |
4416 | dev_kfree_skb(skb); | |
4417 | } | |
4418 | /* frame sent to all suitable interfaces */ | |
4419 | read_unlock(&bond->lock); | |
4420 | return 0; | |
4421 | } | |
4422 | ||
4423 | /*------------------------- Device initialization ---------------------------*/ | |
4424 | ||
4425 | /* | |
4426 | * set bond mode specific net device operations | |
4427 | */ | |
4428 | static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode) | |
4429 | { | |
4430 | switch (mode) { | |
4431 | case BOND_MODE_ROUNDROBIN: | |
4432 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4433 | break; | |
4434 | case BOND_MODE_ACTIVEBACKUP: | |
4435 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4436 | break; | |
4437 | case BOND_MODE_XOR: | |
4438 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
4439 | break; | |
4440 | case BOND_MODE_BROADCAST: | |
4441 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4442 | break; | |
4443 | case BOND_MODE_8023AD: | |
4444 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; | |
4445 | break; | |
4446 | case BOND_MODE_TLB: | |
4447 | case BOND_MODE_ALB: | |
4448 | bond_dev->hard_start_xmit = bond_alb_xmit; | |
4449 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4450 | break; | |
4451 | default: | |
4452 | /* Should never happen, mode already checked */ | |
4453 | printk(KERN_ERR DRV_NAME | |
4454 | ": Error: Unknown bonding mode %d\n", | |
4455 | mode); | |
4456 | break; | |
4457 | } | |
4458 | } | |
4459 | ||
4460 | /* | |
4461 | * Does not allocate but creates a /proc entry. | |
4462 | * Allowed to fail. | |
4463 | */ | |
4464 | static int __init bond_init(struct net_device *bond_dev, struct bond_params *params) | |
4465 | { | |
4466 | struct bonding *bond = bond_dev->priv; | |
4467 | ||
4468 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4469 | ||
4470 | /* initialize rwlocks */ | |
4471 | rwlock_init(&bond->lock); | |
4472 | rwlock_init(&bond->curr_slave_lock); | |
4473 | ||
4474 | bond->params = *params; /* copy params struct */ | |
4475 | ||
4476 | /* Initialize pointers */ | |
4477 | bond->first_slave = NULL; | |
4478 | bond->curr_active_slave = NULL; | |
4479 | bond->current_arp_slave = NULL; | |
4480 | bond->primary_slave = NULL; | |
4481 | bond->dev = bond_dev; | |
4482 | INIT_LIST_HEAD(&bond->vlan_list); | |
4483 | ||
4484 | /* Initialize the device entry points */ | |
4485 | bond_dev->open = bond_open; | |
4486 | bond_dev->stop = bond_close; | |
4487 | bond_dev->get_stats = bond_get_stats; | |
4488 | bond_dev->do_ioctl = bond_do_ioctl; | |
4489 | bond_dev->set_multicast_list = bond_set_multicast_list; | |
4490 | bond_dev->change_mtu = bond_change_mtu; | |
4491 | bond_dev->set_mac_address = bond_set_mac_address; | |
4492 | ||
4493 | bond_set_mode_ops(bond_dev, bond->params.mode); | |
4494 | ||
4495 | bond_dev->destructor = free_netdev; | |
4496 | ||
4497 | /* Initialize the device options */ | |
4498 | bond_dev->tx_queue_len = 0; | |
4499 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
4500 | ||
4501 | /* At first, we block adding VLANs. That's the only way to | |
4502 | * prevent problems that occur when adding VLANs over an | |
4503 | * empty bond. The block will be removed once non-challenged | |
4504 | * slaves are enslaved. | |
4505 | */ | |
4506 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4507 | ||
4508 | /* don't acquire bond device's xmit_lock when | |
4509 | * transmitting */ | |
4510 | bond_dev->features |= NETIF_F_LLTX; | |
4511 | ||
4512 | /* By default, we declare the bond to be fully | |
4513 | * VLAN hardware accelerated capable. Special | |
4514 | * care is taken in the various xmit functions | |
4515 | * when there are slaves that are not hw accel | |
4516 | * capable | |
4517 | */ | |
4518 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4519 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4520 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4521 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4522 | NETIF_F_HW_VLAN_RX | | |
4523 | NETIF_F_HW_VLAN_FILTER); | |
4524 | ||
4525 | #ifdef CONFIG_PROC_FS | |
4526 | bond_create_proc_entry(bond); | |
4527 | #endif | |
4528 | ||
4529 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
4530 | ||
4531 | return 0; | |
4532 | } | |
4533 | ||
4534 | /* De-initialize device specific data. | |
4535 | * Caller must hold rtnl_lock. | |
4536 | */ | |
4537 | static inline void bond_deinit(struct net_device *bond_dev) | |
4538 | { | |
4539 | struct bonding *bond = bond_dev->priv; | |
4540 | ||
4541 | list_del(&bond->bond_list); | |
4542 | ||
4543 | #ifdef CONFIG_PROC_FS | |
4544 | bond_remove_proc_entry(bond); | |
4545 | #endif | |
4546 | } | |
4547 | ||
4548 | /* Unregister and free all bond devices. | |
4549 | * Caller must hold rtnl_lock. | |
4550 | */ | |
4551 | static void bond_free_all(void) | |
4552 | { | |
4553 | struct bonding *bond, *nxt; | |
4554 | ||
4555 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4556 | struct net_device *bond_dev = bond->dev; | |
4557 | ||
4558 | unregister_netdevice(bond_dev); | |
4559 | bond_deinit(bond_dev); | |
4560 | } | |
4561 | ||
4562 | #ifdef CONFIG_PROC_FS | |
4563 | bond_destroy_proc_dir(); | |
4564 | #endif | |
4565 | } | |
4566 | ||
4567 | /*------------------------- Module initialization ---------------------------*/ | |
4568 | ||
4569 | /* | |
4570 | * Convert string input module parms. Accept either the | |
4571 | * number of the mode or its string name. | |
4572 | */ | |
4573 | static inline int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) | |
4574 | { | |
4575 | int i; | |
4576 | ||
4577 | for (i = 0; tbl[i].modename; i++) { | |
4578 | if ((isdigit(*mode_arg) && | |
4579 | tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || | |
4580 | (strncmp(mode_arg, tbl[i].modename, | |
4581 | strlen(tbl[i].modename)) == 0)) { | |
4582 | return tbl[i].mode; | |
4583 | } | |
4584 | } | |
4585 | ||
4586 | return -1; | |
4587 | } | |
4588 | ||
4589 | static int bond_check_params(struct bond_params *params) | |
4590 | { | |
4591 | /* | |
4592 | * Convert string parameters. | |
4593 | */ | |
4594 | if (mode) { | |
4595 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4596 | if (bond_mode == -1) { | |
4597 | printk(KERN_ERR DRV_NAME | |
4598 | ": Error: Invalid bonding mode \"%s\"\n", | |
4599 | mode == NULL ? "NULL" : mode); | |
4600 | return -EINVAL; | |
4601 | } | |
4602 | } | |
4603 | ||
4604 | if (lacp_rate) { | |
4605 | if (bond_mode != BOND_MODE_8023AD) { | |
4606 | printk(KERN_INFO DRV_NAME | |
4607 | ": lacp_rate param is irrelevant in mode %s\n", | |
4608 | bond_mode_name(bond_mode)); | |
4609 | } else { | |
4610 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4611 | if (lacp_fast == -1) { | |
4612 | printk(KERN_ERR DRV_NAME | |
4613 | ": Error: Invalid lacp rate \"%s\"\n", | |
4614 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4615 | return -EINVAL; | |
4616 | } | |
4617 | } | |
4618 | } | |
4619 | ||
4620 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4621 | printk(KERN_WARNING DRV_NAME | |
4622 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4623 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)", | |
4624 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
4625 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4626 | } | |
4627 | ||
4628 | if (miimon < 0) { | |
4629 | printk(KERN_WARNING DRV_NAME | |
4630 | ": Warning: miimon module parameter (%d), " | |
4631 | "not in range 0-%d, so it was reset to %d\n", | |
4632 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4633 | miimon = BOND_LINK_MON_INTERV; | |
4634 | } | |
4635 | ||
4636 | if (updelay < 0) { | |
4637 | printk(KERN_WARNING DRV_NAME | |
4638 | ": Warning: updelay module parameter (%d), " | |
4639 | "not in range 0-%d, so it was reset to 0\n", | |
4640 | updelay, INT_MAX); | |
4641 | updelay = 0; | |
4642 | } | |
4643 | ||
4644 | if (downdelay < 0) { | |
4645 | printk(KERN_WARNING DRV_NAME | |
4646 | ": Warning: downdelay module parameter (%d), " | |
4647 | "not in range 0-%d, so it was reset to 0\n", | |
4648 | downdelay, INT_MAX); | |
4649 | downdelay = 0; | |
4650 | } | |
4651 | ||
4652 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4653 | printk(KERN_WARNING DRV_NAME | |
4654 | ": Warning: use_carrier module parameter (%d), " | |
4655 | "not of valid value (0/1), so it was set to 1\n", | |
4656 | use_carrier); | |
4657 | use_carrier = 1; | |
4658 | } | |
4659 | ||
4660 | /* reset values for 802.3ad */ | |
4661 | if (bond_mode == BOND_MODE_8023AD) { | |
4662 | if (!miimon) { | |
4663 | printk(KERN_WARNING DRV_NAME | |
4664 | ": Warning: miimon must be specified, " | |
4665 | "otherwise bonding will not detect link " | |
4666 | "failure, speed and duplex which are " | |
4667 | "essential for 802.3ad operation\n"); | |
4668 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4669 | miimon = 100; | |
4670 | } | |
4671 | } | |
4672 | ||
4673 | /* reset values for TLB/ALB */ | |
4674 | if ((bond_mode == BOND_MODE_TLB) || | |
4675 | (bond_mode == BOND_MODE_ALB)) { | |
4676 | if (!miimon) { | |
4677 | printk(KERN_WARNING DRV_NAME | |
4678 | ": Warning: miimon must be specified, " | |
4679 | "otherwise bonding will not detect link " | |
4680 | "failure and link speed which are essential " | |
4681 | "for TLB/ALB load balancing\n"); | |
4682 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4683 | miimon = 100; | |
4684 | } | |
4685 | } | |
4686 | ||
4687 | if (bond_mode == BOND_MODE_ALB) { | |
4688 | printk(KERN_NOTICE DRV_NAME | |
4689 | ": In ALB mode you might experience client " | |
4690 | "disconnections upon reconnection of a link if the " | |
4691 | "bonding module updelay parameter (%d msec) is " | |
4692 | "incompatible with the forwarding delay time of the " | |
4693 | "switch\n", | |
4694 | updelay); | |
4695 | } | |
4696 | ||
4697 | if (!miimon) { | |
4698 | if (updelay || downdelay) { | |
4699 | /* just warn the user the up/down delay will have | |
4700 | * no effect since miimon is zero... | |
4701 | */ | |
4702 | printk(KERN_WARNING DRV_NAME | |
4703 | ": Warning: miimon module parameter not set " | |
4704 | "and updelay (%d) or downdelay (%d) module " | |
4705 | "parameter is set; updelay and downdelay have " | |
4706 | "no effect unless miimon is set\n", | |
4707 | updelay, downdelay); | |
4708 | } | |
4709 | } else { | |
4710 | /* don't allow arp monitoring */ | |
4711 | if (arp_interval) { | |
4712 | printk(KERN_WARNING DRV_NAME | |
4713 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4714 | "can't be used simultaneously, disabling ARP " | |
4715 | "monitoring\n", | |
4716 | miimon, arp_interval); | |
4717 | arp_interval = 0; | |
4718 | } | |
4719 | ||
4720 | if ((updelay % miimon) != 0) { | |
4721 | printk(KERN_WARNING DRV_NAME | |
4722 | ": Warning: updelay (%d) is not a multiple " | |
4723 | "of miimon (%d), updelay rounded to %d ms\n", | |
4724 | updelay, miimon, (updelay / miimon) * miimon); | |
4725 | } | |
4726 | ||
4727 | updelay /= miimon; | |
4728 | ||
4729 | if ((downdelay % miimon) != 0) { | |
4730 | printk(KERN_WARNING DRV_NAME | |
4731 | ": Warning: downdelay (%d) is not a multiple " | |
4732 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4733 | downdelay, miimon, | |
4734 | (downdelay / miimon) * miimon); | |
4735 | } | |
4736 | ||
4737 | downdelay /= miimon; | |
4738 | } | |
4739 | ||
4740 | if (arp_interval < 0) { | |
4741 | printk(KERN_WARNING DRV_NAME | |
4742 | ": Warning: arp_interval module parameter (%d) " | |
4743 | ", not in range 0-%d, so it was reset to %d\n", | |
4744 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4745 | arp_interval = BOND_LINK_ARP_INTERV; | |
4746 | } | |
4747 | ||
4748 | for (arp_ip_count = 0; | |
4749 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4750 | arp_ip_count++) { | |
4751 | /* not complete check, but should be good enough to | |
4752 | catch mistakes */ | |
4753 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4754 | printk(KERN_WARNING DRV_NAME | |
4755 | ": Warning: bad arp_ip_target module parameter " | |
4756 | "(%s), ARP monitoring will not be performed\n", | |
4757 | arp_ip_target[arp_ip_count]); | |
4758 | arp_interval = 0; | |
4759 | } else { | |
4760 | u32 ip = in_aton(arp_ip_target[arp_ip_count]); | |
4761 | arp_target[arp_ip_count] = ip; | |
4762 | } | |
4763 | } | |
4764 | ||
4765 | if (arp_interval && !arp_ip_count) { | |
4766 | /* don't allow arping if no arp_ip_target given... */ | |
4767 | printk(KERN_WARNING DRV_NAME | |
4768 | ": Warning: arp_interval module parameter (%d) " | |
4769 | "specified without providing an arp_ip_target " | |
4770 | "parameter, arp_interval was reset to 0\n", | |
4771 | arp_interval); | |
4772 | arp_interval = 0; | |
4773 | } | |
4774 | ||
4775 | if (miimon) { | |
4776 | printk(KERN_INFO DRV_NAME | |
4777 | ": MII link monitoring set to %d ms\n", | |
4778 | miimon); | |
4779 | } else if (arp_interval) { | |
4780 | int i; | |
4781 | ||
4782 | printk(KERN_INFO DRV_NAME | |
4783 | ": ARP monitoring set to %d ms with %d target(s):", | |
4784 | arp_interval, arp_ip_count); | |
4785 | ||
4786 | for (i = 0; i < arp_ip_count; i++) | |
4787 | printk (" %s", arp_ip_target[i]); | |
4788 | ||
4789 | printk("\n"); | |
4790 | ||
4791 | } else { | |
4792 | /* miimon and arp_interval not set, we need one so things | |
4793 | * work as expected, see bonding.txt for details | |
4794 | */ | |
4795 | printk(KERN_WARNING DRV_NAME | |
4796 | ": Warning: either miimon or arp_interval and " | |
4797 | "arp_ip_target module parameters must be specified, " | |
4798 | "otherwise bonding will not detect link failures! see " | |
4799 | "bonding.txt for details.\n"); | |
4800 | } | |
4801 | ||
4802 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4803 | /* currently, using a primary only makes sense | |
4804 | * in active backup, TLB or ALB modes | |
4805 | */ | |
4806 | printk(KERN_WARNING DRV_NAME | |
4807 | ": Warning: %s primary device specified but has no " | |
4808 | "effect in %s mode\n", | |
4809 | primary, bond_mode_name(bond_mode)); | |
4810 | primary = NULL; | |
4811 | } | |
4812 | ||
4813 | /* fill params struct with the proper values */ | |
4814 | params->mode = bond_mode; | |
4815 | params->miimon = miimon; | |
4816 | params->arp_interval = arp_interval; | |
4817 | params->updelay = updelay; | |
4818 | params->downdelay = downdelay; | |
4819 | params->use_carrier = use_carrier; | |
4820 | params->lacp_fast = lacp_fast; | |
4821 | params->primary[0] = 0; | |
4822 | ||
4823 | if (primary) { | |
4824 | strncpy(params->primary, primary, IFNAMSIZ); | |
4825 | params->primary[IFNAMSIZ - 1] = 0; | |
4826 | } | |
4827 | ||
4828 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4829 | ||
4830 | return 0; | |
4831 | } | |
4832 | ||
4833 | static int __init bonding_init(void) | |
4834 | { | |
4835 | struct bond_params params; | |
4836 | int i; | |
4837 | int res; | |
4838 | ||
4839 | printk(KERN_INFO "%s", version); | |
4840 | ||
4841 | res = bond_check_params(¶ms); | |
4842 | if (res) { | |
4843 | return res; | |
4844 | } | |
4845 | ||
4846 | rtnl_lock(); | |
4847 | ||
4848 | #ifdef CONFIG_PROC_FS | |
4849 | bond_create_proc_dir(); | |
4850 | #endif | |
4851 | ||
4852 | for (i = 0; i < max_bonds; i++) { | |
4853 | struct net_device *bond_dev; | |
4854 | ||
4855 | bond_dev = alloc_netdev(sizeof(struct bonding), "", ether_setup); | |
4856 | if (!bond_dev) { | |
4857 | res = -ENOMEM; | |
4858 | goto out_err; | |
4859 | } | |
4860 | ||
4861 | res = dev_alloc_name(bond_dev, "bond%d"); | |
4862 | if (res < 0) { | |
4863 | free_netdev(bond_dev); | |
4864 | goto out_err; | |
4865 | } | |
4866 | ||
4867 | /* bond_init() must be called after dev_alloc_name() (for the | |
4868 | * /proc files), but before register_netdevice(), because we | |
4869 | * need to set function pointers. | |
4870 | */ | |
4871 | res = bond_init(bond_dev, ¶ms); | |
4872 | if (res < 0) { | |
4873 | free_netdev(bond_dev); | |
4874 | goto out_err; | |
4875 | } | |
4876 | ||
4877 | SET_MODULE_OWNER(bond_dev); | |
4878 | ||
4879 | res = register_netdevice(bond_dev); | |
4880 | if (res < 0) { | |
4881 | bond_deinit(bond_dev); | |
4882 | free_netdev(bond_dev); | |
4883 | goto out_err; | |
4884 | } | |
4885 | } | |
4886 | ||
4887 | rtnl_unlock(); | |
4888 | register_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4889 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 LT |
4890 | |
4891 | return 0; | |
4892 | ||
4893 | out_err: | |
4894 | /* free and unregister all bonds that were successfully added */ | |
4895 | bond_free_all(); | |
4896 | ||
4897 | rtnl_unlock(); | |
4898 | ||
4899 | return res; | |
4900 | } | |
4901 | ||
4902 | static void __exit bonding_exit(void) | |
4903 | { | |
4904 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4905 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 LT |
4906 | |
4907 | rtnl_lock(); | |
4908 | bond_free_all(); | |
4909 | rtnl_unlock(); | |
4910 | } | |
4911 | ||
4912 | module_init(bonding_init); | |
4913 | module_exit(bonding_exit); | |
4914 | MODULE_LICENSE("GPL"); | |
4915 | MODULE_VERSION(DRV_VERSION); | |
4916 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4917 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
4918 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
4919 | ||
4920 | /* | |
4921 | * Local variables: | |
4922 | * c-indent-level: 8 | |
4923 | * c-basic-offset: 8 | |
4924 | * tab-width: 8 | |
4925 | * End: | |
4926 | */ | |
4927 |