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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
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. | |
478 | * | |
479 | */ | |
480 | ||
481 | //#define BONDING_DEBUG 1 | |
482 | ||
483 | #include <linux/config.h> | |
484 | #include <linux/kernel.h> | |
485 | #include <linux/module.h> | |
486 | #include <linux/sched.h> | |
487 | #include <linux/types.h> | |
488 | #include <linux/fcntl.h> | |
489 | #include <linux/interrupt.h> | |
490 | #include <linux/ptrace.h> | |
491 | #include <linux/ioport.h> | |
492 | #include <linux/in.h> | |
493 | #include <linux/ip.h> | |
494 | #include <linux/slab.h> | |
495 | #include <linux/string.h> | |
496 | #include <linux/init.h> | |
497 | #include <linux/timer.h> | |
498 | #include <linux/socket.h> | |
499 | #include <linux/ctype.h> | |
500 | #include <linux/inet.h> | |
501 | #include <linux/bitops.h> | |
502 | #include <asm/system.h> | |
503 | #include <asm/io.h> | |
504 | #include <asm/dma.h> | |
505 | #include <asm/uaccess.h> | |
506 | #include <linux/errno.h> | |
507 | #include <linux/netdevice.h> | |
508 | #include <linux/inetdevice.h> | |
509 | #include <linux/etherdevice.h> | |
510 | #include <linux/skbuff.h> | |
511 | #include <net/sock.h> | |
512 | #include <linux/rtnetlink.h> | |
513 | #include <linux/proc_fs.h> | |
514 | #include <linux/seq_file.h> | |
515 | #include <linux/smp.h> | |
516 | #include <linux/if_ether.h> | |
517 | #include <net/arp.h> | |
518 | #include <linux/mii.h> | |
519 | #include <linux/ethtool.h> | |
520 | #include <linux/if_vlan.h> | |
521 | #include <linux/if_bonding.h> | |
522 | #include "bonding.h" | |
523 | #include "bond_3ad.h" | |
524 | #include "bond_alb.h" | |
525 | ||
526 | /*---------------------------- Module parameters ----------------------------*/ | |
527 | ||
528 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
529 | #define BOND_LINK_MON_INTERV 0 | |
530 | #define BOND_LINK_ARP_INTERV 0 | |
531 | ||
532 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
533 | static int miimon = BOND_LINK_MON_INTERV; | |
534 | static int updelay = 0; | |
535 | static int downdelay = 0; | |
536 | static int use_carrier = 1; | |
537 | static char *mode = NULL; | |
538 | static char *primary = NULL; | |
539 | static char *lacp_rate = NULL; | |
540 | static int arp_interval = BOND_LINK_ARP_INTERV; | |
541 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
542 | ||
543 | module_param(max_bonds, int, 0); | |
544 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
545 | module_param(miimon, int, 0); | |
546 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
547 | module_param(updelay, int, 0); | |
548 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
549 | module_param(downdelay, int, 0); | |
550 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, in milliseconds"); | |
551 | module_param(use_carrier, int, 0); | |
552 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; 0 for off, 1 for on (default)"); | |
553 | module_param(mode, charp, 0); | |
554 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for round robin, 1 for active-backup, 2 for xor"); | |
555 | module_param(primary, charp, 0); | |
556 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
557 | module_param(lacp_rate, charp, 0); | |
558 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner (slow/fast)"); | |
559 | module_param(arp_interval, int, 0); | |
560 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
561 | module_param_array(arp_ip_target, charp, NULL, 0); | |
562 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
563 | ||
564 | /*----------------------------- Global variables ----------------------------*/ | |
565 | ||
566 | static const char *version = | |
567 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; | |
568 | ||
569 | static LIST_HEAD(bond_dev_list); | |
570 | ||
571 | #ifdef CONFIG_PROC_FS | |
572 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
573 | #endif | |
574 | ||
575 | static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; | |
576 | static int arp_ip_count = 0; | |
577 | static u32 my_ip = 0; | |
578 | static int bond_mode = BOND_MODE_ROUNDROBIN; | |
579 | static int lacp_fast = 0; | |
580 | static int app_abi_ver = 0; | |
581 | static int orig_app_abi_ver = -1; /* This is used to save the first ABI version | |
582 | * we receive from the application. Once set, | |
583 | * it won't be changed, and the module will | |
584 | * refuse to enslave/release interfaces if the | |
585 | * command comes from an application using | |
586 | * another ABI version. | |
587 | */ | |
588 | ||
589 | struct bond_parm_tbl { | |
590 | char *modename; | |
591 | int mode; | |
592 | }; | |
593 | ||
594 | static struct bond_parm_tbl bond_lacp_tbl[] = { | |
595 | { "slow", AD_LACP_SLOW}, | |
596 | { "fast", AD_LACP_FAST}, | |
597 | { NULL, -1}, | |
598 | }; | |
599 | ||
600 | static struct bond_parm_tbl bond_mode_tbl[] = { | |
601 | { "balance-rr", BOND_MODE_ROUNDROBIN}, | |
602 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
603 | { "balance-xor", BOND_MODE_XOR}, | |
604 | { "broadcast", BOND_MODE_BROADCAST}, | |
605 | { "802.3ad", BOND_MODE_8023AD}, | |
606 | { "balance-tlb", BOND_MODE_TLB}, | |
607 | { "balance-alb", BOND_MODE_ALB}, | |
608 | { NULL, -1}, | |
609 | }; | |
610 | ||
611 | /*-------------------------- Forward declarations ---------------------------*/ | |
612 | ||
613 | static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode); | |
614 | ||
615 | /*---------------------------- General routines -----------------------------*/ | |
616 | ||
617 | static const char *bond_mode_name(int mode) | |
618 | { | |
619 | switch (mode) { | |
620 | case BOND_MODE_ROUNDROBIN : | |
621 | return "load balancing (round-robin)"; | |
622 | case BOND_MODE_ACTIVEBACKUP : | |
623 | return "fault-tolerance (active-backup)"; | |
624 | case BOND_MODE_XOR : | |
625 | return "load balancing (xor)"; | |
626 | case BOND_MODE_BROADCAST : | |
627 | return "fault-tolerance (broadcast)"; | |
628 | case BOND_MODE_8023AD: | |
629 | return "IEEE 802.3ad Dynamic link aggregation"; | |
630 | case BOND_MODE_TLB: | |
631 | return "transmit load balancing"; | |
632 | case BOND_MODE_ALB: | |
633 | return "adaptive load balancing"; | |
634 | default: | |
635 | return "unknown"; | |
636 | } | |
637 | } | |
638 | ||
639 | /*---------------------------------- VLAN -----------------------------------*/ | |
640 | ||
641 | /** | |
642 | * bond_add_vlan - add a new vlan id on bond | |
643 | * @bond: bond that got the notification | |
644 | * @vlan_id: the vlan id to add | |
645 | * | |
646 | * Returns -ENOMEM if allocation failed. | |
647 | */ | |
648 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
649 | { | |
650 | struct vlan_entry *vlan; | |
651 | ||
652 | dprintk("bond: %s, vlan id %d\n", | |
653 | (bond ? bond->dev->name: "None"), vlan_id); | |
654 | ||
655 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
656 | if (!vlan) { | |
657 | return -ENOMEM; | |
658 | } | |
659 | ||
660 | INIT_LIST_HEAD(&vlan->vlan_list); | |
661 | vlan->vlan_id = vlan_id; | |
662 | ||
663 | write_lock_bh(&bond->lock); | |
664 | ||
665 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
666 | ||
667 | write_unlock_bh(&bond->lock); | |
668 | ||
669 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | /** | |
675 | * bond_del_vlan - delete a vlan id from bond | |
676 | * @bond: bond that got the notification | |
677 | * @vlan_id: the vlan id to delete | |
678 | * | |
679 | * returns -ENODEV if @vlan_id was not found in @bond. | |
680 | */ | |
681 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
682 | { | |
683 | struct vlan_entry *vlan, *next; | |
684 | int res = -ENODEV; | |
685 | ||
686 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
687 | ||
688 | write_lock_bh(&bond->lock); | |
689 | ||
690 | list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { | |
691 | if (vlan->vlan_id == vlan_id) { | |
692 | list_del(&vlan->vlan_list); | |
693 | ||
694 | if ((bond->params.mode == BOND_MODE_TLB) || | |
695 | (bond->params.mode == BOND_MODE_ALB)) { | |
696 | bond_alb_clear_vlan(bond, vlan_id); | |
697 | } | |
698 | ||
699 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
700 | bond->dev->name); | |
701 | ||
702 | kfree(vlan); | |
703 | ||
704 | if (list_empty(&bond->vlan_list) && | |
705 | (bond->slave_cnt == 0)) { | |
706 | /* Last VLAN removed and no slaves, so | |
707 | * restore block on adding VLANs. This will | |
708 | * be removed once new slaves that are not | |
709 | * VLAN challenged will be added. | |
710 | */ | |
711 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
712 | } | |
713 | ||
714 | res = 0; | |
715 | goto out; | |
716 | } | |
717 | } | |
718 | ||
719 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
720 | bond->dev->name); | |
721 | ||
722 | out: | |
723 | write_unlock_bh(&bond->lock); | |
724 | return res; | |
725 | } | |
726 | ||
727 | /** | |
728 | * bond_has_challenged_slaves | |
729 | * @bond: the bond we're working on | |
730 | * | |
731 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
732 | * was found, 0 otherwise. | |
733 | * | |
734 | * Assumes bond->lock is held. | |
735 | */ | |
736 | static int bond_has_challenged_slaves(struct bonding *bond) | |
737 | { | |
738 | struct slave *slave; | |
739 | int i; | |
740 | ||
741 | bond_for_each_slave(bond, slave, i) { | |
742 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
743 | dprintk("found VLAN challenged slave - %s\n", | |
744 | slave->dev->name); | |
745 | return 1; | |
746 | } | |
747 | } | |
748 | ||
749 | dprintk("no VLAN challenged slaves found\n"); | |
750 | return 0; | |
751 | } | |
752 | ||
753 | /** | |
754 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
755 | * @bond: the bond we're working on | |
756 | * @curr: item we're advancing from | |
757 | * | |
758 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
759 | * or @curr->next otherwise (even if it is @curr itself again). | |
760 | * | |
761 | * Caller must hold bond->lock | |
762 | */ | |
763 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
764 | { | |
765 | struct vlan_entry *next, *last; | |
766 | ||
767 | if (list_empty(&bond->vlan_list)) { | |
768 | return NULL; | |
769 | } | |
770 | ||
771 | if (!curr) { | |
772 | next = list_entry(bond->vlan_list.next, | |
773 | struct vlan_entry, vlan_list); | |
774 | } else { | |
775 | last = list_entry(bond->vlan_list.prev, | |
776 | struct vlan_entry, vlan_list); | |
777 | if (last == curr) { | |
778 | next = list_entry(bond->vlan_list.next, | |
779 | struct vlan_entry, vlan_list); | |
780 | } else { | |
781 | next = list_entry(curr->vlan_list.next, | |
782 | struct vlan_entry, vlan_list); | |
783 | } | |
784 | } | |
785 | ||
786 | return next; | |
787 | } | |
788 | ||
789 | /** | |
790 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
791 | * | |
792 | * @bond: bond device that got this skb for tx. | |
793 | * @skb: hw accel VLAN tagged skb to transmit | |
794 | * @slave_dev: slave that is supposed to xmit this skbuff | |
795 | * | |
796 | * When the bond gets an skb to transmit that is | |
797 | * already hardware accelerated VLAN tagged, and it | |
798 | * needs to relay this skb to a slave that is not | |
799 | * hw accel capable, the skb needs to be "unaccelerated", | |
800 | * i.e. strip the hwaccel tag and re-insert it as part | |
801 | * of the payload. | |
802 | */ | |
803 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
804 | { | |
805 | unsigned short vlan_id; | |
806 | ||
807 | if (!list_empty(&bond->vlan_list) && | |
808 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
809 | vlan_get_tag(skb, &vlan_id) == 0) { | |
810 | skb->dev = slave_dev; | |
811 | skb = vlan_put_tag(skb, vlan_id); | |
812 | if (!skb) { | |
813 | /* vlan_put_tag() frees the skb in case of error, | |
814 | * so return success here so the calling functions | |
815 | * won't attempt to free is again. | |
816 | */ | |
817 | return 0; | |
818 | } | |
819 | } else { | |
820 | skb->dev = slave_dev; | |
821 | } | |
822 | ||
823 | skb->priority = 1; | |
824 | dev_queue_xmit(skb); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /* | |
830 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
831 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
832 | * lock because: | |
833 | * a. This operation is performed in IOCTL context, | |
834 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
835 | * c. Holding a lock with BH disabled while directly calling a base driver | |
836 | * entry point is generally a BAD idea. | |
837 | * | |
838 | * The design of synchronization/protection for this operation in the 8021q | |
839 | * module is good for one or more VLAN devices over a single physical device | |
840 | * and cannot be extended for a teaming solution like bonding, so there is a | |
841 | * potential race condition here where a net device from the vlan group might | |
842 | * be referenced (either by a base driver or the 8021q code) while it is being | |
843 | * removed from the system. However, it turns out we're not making matters | |
844 | * worse, and if it works for regular VLAN usage it will work here too. | |
845 | */ | |
846 | ||
847 | /** | |
848 | * bond_vlan_rx_register - Propagates registration to slaves | |
849 | * @bond_dev: bonding net device that got called | |
850 | * @grp: vlan group being registered | |
851 | */ | |
852 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
853 | { | |
854 | struct bonding *bond = bond_dev->priv; | |
855 | struct slave *slave; | |
856 | int i; | |
857 | ||
858 | bond->vlgrp = grp; | |
859 | ||
860 | bond_for_each_slave(bond, slave, i) { | |
861 | struct net_device *slave_dev = slave->dev; | |
862 | ||
863 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
864 | slave_dev->vlan_rx_register) { | |
865 | slave_dev->vlan_rx_register(slave_dev, grp); | |
866 | } | |
867 | } | |
868 | } | |
869 | ||
870 | /** | |
871 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
872 | * @bond_dev: bonding net device that got called | |
873 | * @vid: vlan id being added | |
874 | */ | |
875 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
876 | { | |
877 | struct bonding *bond = bond_dev->priv; | |
878 | struct slave *slave; | |
879 | int i, res; | |
880 | ||
881 | bond_for_each_slave(bond, slave, i) { | |
882 | struct net_device *slave_dev = slave->dev; | |
883 | ||
884 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
885 | slave_dev->vlan_rx_add_vid) { | |
886 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
887 | } | |
888 | } | |
889 | ||
890 | res = bond_add_vlan(bond, vid); | |
891 | if (res) { | |
892 | printk(KERN_ERR DRV_NAME | |
893 | ": %s: Failed to add vlan id %d\n", | |
894 | bond_dev->name, vid); | |
895 | } | |
896 | } | |
897 | ||
898 | /** | |
899 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
900 | * @bond_dev: bonding net device that got called | |
901 | * @vid: vlan id being removed | |
902 | */ | |
903 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
904 | { | |
905 | struct bonding *bond = bond_dev->priv; | |
906 | struct slave *slave; | |
907 | struct net_device *vlan_dev; | |
908 | int i, res; | |
909 | ||
910 | bond_for_each_slave(bond, slave, i) { | |
911 | struct net_device *slave_dev = slave->dev; | |
912 | ||
913 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
914 | slave_dev->vlan_rx_kill_vid) { | |
915 | /* Save and then restore vlan_dev in the grp array, | |
916 | * since the slave's driver might clear it. | |
917 | */ | |
918 | vlan_dev = bond->vlgrp->vlan_devices[vid]; | |
919 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); | |
920 | bond->vlgrp->vlan_devices[vid] = vlan_dev; | |
921 | } | |
922 | } | |
923 | ||
924 | res = bond_del_vlan(bond, vid); | |
925 | if (res) { | |
926 | printk(KERN_ERR DRV_NAME | |
927 | ": %s: Failed to remove vlan id %d\n", | |
928 | bond_dev->name, vid); | |
929 | } | |
930 | } | |
931 | ||
932 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
933 | { | |
934 | struct vlan_entry *vlan; | |
935 | ||
936 | write_lock_bh(&bond->lock); | |
937 | ||
938 | if (list_empty(&bond->vlan_list)) { | |
939 | goto out; | |
940 | } | |
941 | ||
942 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
943 | slave_dev->vlan_rx_register) { | |
944 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
945 | } | |
946 | ||
947 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
948 | !(slave_dev->vlan_rx_add_vid)) { | |
949 | goto out; | |
950 | } | |
951 | ||
952 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
953 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
954 | } | |
955 | ||
956 | out: | |
957 | write_unlock_bh(&bond->lock); | |
958 | } | |
959 | ||
960 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
961 | { | |
962 | struct vlan_entry *vlan; | |
963 | struct net_device *vlan_dev; | |
964 | ||
965 | write_lock_bh(&bond->lock); | |
966 | ||
967 | if (list_empty(&bond->vlan_list)) { | |
968 | goto out; | |
969 | } | |
970 | ||
971 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
972 | !(slave_dev->vlan_rx_kill_vid)) { | |
973 | goto unreg; | |
974 | } | |
975 | ||
976 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
977 | /* Save and then restore vlan_dev in the grp array, | |
978 | * since the slave's driver might clear it. | |
979 | */ | |
980 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
981 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); | |
982 | bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; | |
983 | } | |
984 | ||
985 | unreg: | |
986 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
987 | slave_dev->vlan_rx_register) { | |
988 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
989 | } | |
990 | ||
991 | out: | |
992 | write_unlock_bh(&bond->lock); | |
993 | } | |
994 | ||
995 | /*------------------------------- Link status -------------------------------*/ | |
996 | ||
997 | /* | |
998 | * Get link speed and duplex from the slave's base driver | |
999 | * using ethtool. If for some reason the call fails or the | |
1000 | * values are invalid, fake speed and duplex to 100/Full | |
1001 | * and return error. | |
1002 | */ | |
1003 | static int bond_update_speed_duplex(struct slave *slave) | |
1004 | { | |
1005 | struct net_device *slave_dev = slave->dev; | |
1006 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1007 | struct ifreq ifr; | |
1008 | struct ethtool_cmd etool; | |
1009 | ||
1010 | /* Fake speed and duplex */ | |
1011 | slave->speed = SPEED_100; | |
1012 | slave->duplex = DUPLEX_FULL; | |
1013 | ||
1014 | if (slave_dev->ethtool_ops) { | |
1015 | u32 res; | |
1016 | ||
1017 | if (!slave_dev->ethtool_ops->get_settings) { | |
1018 | return -1; | |
1019 | } | |
1020 | ||
1021 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); | |
1022 | if (res < 0) { | |
1023 | return -1; | |
1024 | } | |
1025 | ||
1026 | goto verify; | |
1027 | } | |
1028 | ||
1029 | ioctl = slave_dev->do_ioctl; | |
1030 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1031 | etool.cmd = ETHTOOL_GSET; | |
1032 | ifr.ifr_data = (char*)&etool; | |
1033 | if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { | |
1034 | return -1; | |
1035 | } | |
1036 | ||
1037 | verify: | |
1038 | switch (etool.speed) { | |
1039 | case SPEED_10: | |
1040 | case SPEED_100: | |
1041 | case SPEED_1000: | |
1042 | break; | |
1043 | default: | |
1044 | return -1; | |
1045 | } | |
1046 | ||
1047 | switch (etool.duplex) { | |
1048 | case DUPLEX_FULL: | |
1049 | case DUPLEX_HALF: | |
1050 | break; | |
1051 | default: | |
1052 | return -1; | |
1053 | } | |
1054 | ||
1055 | slave->speed = etool.speed; | |
1056 | slave->duplex = etool.duplex; | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * if <dev> supports MII link status reporting, check its link status. | |
1063 | * | |
1064 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
1065 | * depening upon the setting of the use_carrier parameter. | |
1066 | * | |
1067 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
1068 | * can't tell and just pretend it is), or 0, meaning that the link is | |
1069 | * down. | |
1070 | * | |
1071 | * If reporting is non-zero, instead of faking link up, return -1 if | |
1072 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
1073 | * support them). If use_carrier is set, return whatever it says. | |
1074 | * It'd be nice if there was a good way to tell if a driver supports | |
1075 | * netif_carrier, but there really isn't. | |
1076 | */ | |
1077 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
1078 | { | |
1079 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
1080 | struct ifreq ifr; | |
1081 | struct mii_ioctl_data *mii; | |
1082 | struct ethtool_value etool; | |
1083 | ||
1084 | if (bond->params.use_carrier) { | |
1085 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
1086 | } | |
1087 | ||
1088 | ioctl = slave_dev->do_ioctl; | |
1089 | if (ioctl) { | |
1090 | /* TODO: set pointer to correct ioctl on a per team member */ | |
1091 | /* bases to make this more efficient. that is, once */ | |
1092 | /* we determine the correct ioctl, we will always */ | |
1093 | /* call it and not the others for that team */ | |
1094 | /* member. */ | |
1095 | ||
1096 | /* | |
1097 | * We cannot assume that SIOCGMIIPHY will also read a | |
1098 | * register; not all network drivers (e.g., e100) | |
1099 | * support that. | |
1100 | */ | |
1101 | ||
1102 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
1103 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1104 | mii = if_mii(&ifr); | |
1105 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
1106 | mii->reg_num = MII_BMSR; | |
1107 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
1108 | return (mii->val_out & BMSR_LSTATUS); | |
1109 | } | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ | |
1114 | /* for a period of time so we attempt to get link status */ | |
1115 | /* from it last if the above MII ioctls fail... */ | |
1116 | if (slave_dev->ethtool_ops) { | |
1117 | if (slave_dev->ethtool_ops->get_link) { | |
1118 | u32 link; | |
1119 | ||
1120 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
1121 | ||
1122 | return link ? BMSR_LSTATUS : 0; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | if (ioctl) { | |
1127 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
1128 | etool.cmd = ETHTOOL_GLINK; | |
1129 | ifr.ifr_data = (char*)&etool; | |
1130 | if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { | |
1131 | if (etool.data == 1) { | |
1132 | return BMSR_LSTATUS; | |
1133 | } else { | |
1134 | dprintk("SIOCETHTOOL shows link down\n"); | |
1135 | return 0; | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * If reporting, report that either there's no dev->do_ioctl, | |
1142 | * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we | |
1143 | * cannot report link status). If not reporting, pretend | |
1144 | * we're ok. | |
1145 | */ | |
1146 | return (reporting ? -1 : BMSR_LSTATUS); | |
1147 | } | |
1148 | ||
1149 | /*----------------------------- Multicast list ------------------------------*/ | |
1150 | ||
1151 | /* | |
1152 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
1153 | */ | |
1154 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
1155 | { | |
1156 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
1157 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * returns dmi entry if found, NULL otherwise | |
1162 | */ | |
1163 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
1164 | { | |
1165 | struct dev_mc_list *idmi; | |
1166 | ||
1167 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
1168 | if (bond_is_dmi_same(dmi, idmi)) { | |
1169 | return idmi; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | return NULL; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Push the promiscuity flag down to appropriate slaves | |
1178 | */ | |
1179 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
1180 | { | |
1181 | if (USES_PRIMARY(bond->params.mode)) { | |
1182 | /* write lock already acquired */ | |
1183 | if (bond->curr_active_slave) { | |
1184 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
1185 | } | |
1186 | } else { | |
1187 | struct slave *slave; | |
1188 | int i; | |
1189 | bond_for_each_slave(bond, slave, i) { | |
1190 | dev_set_promiscuity(slave->dev, inc); | |
1191 | } | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * Push the allmulti flag down to all slaves | |
1197 | */ | |
1198 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
1199 | { | |
1200 | if (USES_PRIMARY(bond->params.mode)) { | |
1201 | /* write lock already acquired */ | |
1202 | if (bond->curr_active_slave) { | |
1203 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
1204 | } | |
1205 | } else { | |
1206 | struct slave *slave; | |
1207 | int i; | |
1208 | bond_for_each_slave(bond, slave, i) { | |
1209 | dev_set_allmulti(slave->dev, inc); | |
1210 | } | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | /* | |
1215 | * Add a Multicast address to slaves | |
1216 | * according to mode | |
1217 | */ | |
1218 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
1219 | { | |
1220 | if (USES_PRIMARY(bond->params.mode)) { | |
1221 | /* write lock already acquired */ | |
1222 | if (bond->curr_active_slave) { | |
1223 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
1224 | } | |
1225 | } else { | |
1226 | struct slave *slave; | |
1227 | int i; | |
1228 | bond_for_each_slave(bond, slave, i) { | |
1229 | dev_mc_add(slave->dev, addr, alen, 0); | |
1230 | } | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * Remove a multicast address from slave | |
1236 | * according to mode | |
1237 | */ | |
1238 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
1239 | { | |
1240 | if (USES_PRIMARY(bond->params.mode)) { | |
1241 | /* write lock already acquired */ | |
1242 | if (bond->curr_active_slave) { | |
1243 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
1244 | } | |
1245 | } else { | |
1246 | struct slave *slave; | |
1247 | int i; | |
1248 | bond_for_each_slave(bond, slave, i) { | |
1249 | dev_mc_delete(slave->dev, addr, alen, 0); | |
1250 | } | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Totally destroys the mc_list in bond | |
1256 | */ | |
1257 | static void bond_mc_list_destroy(struct bonding *bond) | |
1258 | { | |
1259 | struct dev_mc_list *dmi; | |
1260 | ||
1261 | dmi = bond->mc_list; | |
1262 | while (dmi) { | |
1263 | bond->mc_list = dmi->next; | |
1264 | kfree(dmi); | |
1265 | dmi = bond->mc_list; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * Copy all the Multicast addresses from src to the bonding device dst | |
1271 | */ | |
1272 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, int gpf_flag) | |
1273 | { | |
1274 | struct dev_mc_list *dmi, *new_dmi; | |
1275 | ||
1276 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
1277 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gpf_flag); | |
1278 | ||
1279 | if (!new_dmi) { | |
1280 | /* FIXME: Potential memory leak !!! */ | |
1281 | return -ENOMEM; | |
1282 | } | |
1283 | ||
1284 | new_dmi->next = bond->mc_list; | |
1285 | bond->mc_list = new_dmi; | |
1286 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
1287 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
1288 | new_dmi->dmi_users = dmi->dmi_users; | |
1289 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
1290 | } | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * flush all members of flush->mc_list from device dev->mc_list | |
1297 | */ | |
1298 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
1299 | { | |
1300 | struct bonding *bond = bond_dev->priv; | |
1301 | struct dev_mc_list *dmi; | |
1302 | ||
1303 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1304 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1305 | } | |
1306 | ||
1307 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1308 | /* del lacpdu mc addr from mc list */ | |
1309 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1310 | ||
1311 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | /*--------------------------- Active slave change ---------------------------*/ | |
1316 | ||
1317 | /* | |
1318 | * Update the mc list and multicast-related flags for the new and | |
1319 | * old active slaves (if any) according to the multicast mode, and | |
1320 | * promiscuous flags unconditionally. | |
1321 | */ | |
1322 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
1323 | { | |
1324 | struct dev_mc_list *dmi; | |
1325 | ||
1326 | if (!USES_PRIMARY(bond->params.mode)) { | |
1327 | /* nothing to do - mc list is already up-to-date on | |
1328 | * all slaves | |
1329 | */ | |
1330 | return; | |
1331 | } | |
1332 | ||
1333 | if (old_active) { | |
1334 | if (bond->dev->flags & IFF_PROMISC) { | |
1335 | dev_set_promiscuity(old_active->dev, -1); | |
1336 | } | |
1337 | ||
1338 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1339 | dev_set_allmulti(old_active->dev, -1); | |
1340 | } | |
1341 | ||
1342 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1343 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | if (new_active) { | |
1348 | if (bond->dev->flags & IFF_PROMISC) { | |
1349 | dev_set_promiscuity(new_active->dev, 1); | |
1350 | } | |
1351 | ||
1352 | if (bond->dev->flags & IFF_ALLMULTI) { | |
1353 | dev_set_allmulti(new_active->dev, 1); | |
1354 | } | |
1355 | ||
1356 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
1357 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1358 | } | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * find_best_interface - select the best available slave to be the active one | |
1364 | * @bond: our bonding struct | |
1365 | * | |
1366 | * Warning: Caller must hold curr_slave_lock for writing. | |
1367 | */ | |
1368 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1369 | { | |
1370 | struct slave *new_active, *old_active; | |
1371 | struct slave *bestslave = NULL; | |
1372 | int mintime = bond->params.updelay; | |
1373 | int i; | |
1374 | ||
1375 | new_active = old_active = bond->curr_active_slave; | |
1376 | ||
1377 | if (!new_active) { /* there were no active slaves left */ | |
1378 | if (bond->slave_cnt > 0) { /* found one slave */ | |
1379 | new_active = bond->first_slave; | |
1380 | } else { | |
1381 | return NULL; /* still no slave, return NULL */ | |
1382 | } | |
1383 | } | |
1384 | ||
1385 | /* first try the primary link; if arping, a link must tx/rx traffic | |
1386 | * before it can be considered the curr_active_slave - also, we would skip | |
1387 | * slaves between the curr_active_slave and primary_slave that may be up | |
1388 | * and able to arp | |
1389 | */ | |
1390 | if ((bond->primary_slave) && | |
1391 | (!bond->params.arp_interval) && | |
1392 | (IS_UP(bond->primary_slave->dev))) { | |
1393 | new_active = bond->primary_slave; | |
1394 | } | |
1395 | ||
1396 | /* remember where to stop iterating over the slaves */ | |
1397 | old_active = new_active; | |
1398 | ||
1399 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1400 | if (IS_UP(new_active->dev)) { | |
1401 | if (new_active->link == BOND_LINK_UP) { | |
1402 | return new_active; | |
1403 | } else if (new_active->link == BOND_LINK_BACK) { | |
1404 | /* link up, but waiting for stabilization */ | |
1405 | if (new_active->delay < mintime) { | |
1406 | mintime = new_active->delay; | |
1407 | bestslave = new_active; | |
1408 | } | |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | return bestslave; | |
1414 | } | |
1415 | ||
1416 | /** | |
1417 | * change_active_interface - change the active slave into the specified one | |
1418 | * @bond: our bonding struct | |
1419 | * @new: the new slave to make the active one | |
1420 | * | |
1421 | * Set the new slave to the bond's settings and unset them on the old | |
1422 | * curr_active_slave. | |
1423 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1424 | * | |
1425 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1426 | * because it is apparently the best available slave we have, even though its | |
1427 | * updelay hasn't timed out yet. | |
1428 | * | |
1429 | * Warning: Caller must hold curr_slave_lock for writing. | |
1430 | */ | |
1431 | static void bond_change_active_slave(struct bonding *bond, struct slave *new_active) | |
1432 | { | |
1433 | struct slave *old_active = bond->curr_active_slave; | |
1434 | ||
1435 | if (old_active == new_active) { | |
1436 | return; | |
1437 | } | |
1438 | ||
1439 | if (new_active) { | |
1440 | if (new_active->link == BOND_LINK_BACK) { | |
1441 | if (USES_PRIMARY(bond->params.mode)) { | |
1442 | printk(KERN_INFO DRV_NAME | |
1443 | ": %s: making interface %s the new " | |
1444 | "active one %d ms earlier.\n", | |
1445 | bond->dev->name, new_active->dev->name, | |
1446 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1447 | } | |
1448 | ||
1449 | new_active->delay = 0; | |
1450 | new_active->link = BOND_LINK_UP; | |
1451 | new_active->jiffies = jiffies; | |
1452 | ||
1453 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1454 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1455 | } | |
1456 | ||
1457 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1458 | (bond->params.mode == BOND_MODE_ALB)) { | |
1459 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1460 | } | |
1461 | } else { | |
1462 | if (USES_PRIMARY(bond->params.mode)) { | |
1463 | printk(KERN_INFO DRV_NAME | |
1464 | ": %s: making interface %s the new " | |
1465 | "active one.\n", | |
1466 | bond->dev->name, new_active->dev->name); | |
1467 | } | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1472 | if (old_active) { | |
1473 | bond_set_slave_inactive_flags(old_active); | |
1474 | } | |
1475 | ||
1476 | if (new_active) { | |
1477 | bond_set_slave_active_flags(new_active); | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | if (USES_PRIMARY(bond->params.mode)) { | |
1482 | bond_mc_swap(bond, new_active, old_active); | |
1483 | } | |
1484 | ||
1485 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1486 | (bond->params.mode == BOND_MODE_ALB)) { | |
1487 | bond_alb_handle_active_change(bond, new_active); | |
1488 | } else { | |
1489 | bond->curr_active_slave = new_active; | |
1490 | } | |
1491 | } | |
1492 | ||
1493 | /** | |
1494 | * bond_select_active_slave - select a new active slave, if needed | |
1495 | * @bond: our bonding struct | |
1496 | * | |
1497 | * This functions shoud be called when one of the following occurs: | |
1498 | * - The old curr_active_slave has been released or lost its link. | |
1499 | * - The primary_slave has got its link back. | |
1500 | * - A slave has got its link back and there's no old curr_active_slave. | |
1501 | * | |
1502 | * Warning: Caller must hold curr_slave_lock for writing. | |
1503 | */ | |
1504 | static void bond_select_active_slave(struct bonding *bond) | |
1505 | { | |
1506 | struct slave *best_slave; | |
1507 | ||
1508 | best_slave = bond_find_best_slave(bond); | |
1509 | if (best_slave != bond->curr_active_slave) { | |
1510 | bond_change_active_slave(bond, best_slave); | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | /*--------------------------- slave list handling ---------------------------*/ | |
1515 | ||
1516 | /* | |
1517 | * This function attaches the slave to the end of list. | |
1518 | * | |
1519 | * bond->lock held for writing by caller. | |
1520 | */ | |
1521 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1522 | { | |
1523 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1524 | new_slave->next = new_slave; | |
1525 | new_slave->prev = new_slave; | |
1526 | bond->first_slave = new_slave; | |
1527 | } else { | |
1528 | new_slave->next = bond->first_slave; | |
1529 | new_slave->prev = bond->first_slave->prev; | |
1530 | new_slave->next->prev = new_slave; | |
1531 | new_slave->prev->next = new_slave; | |
1532 | } | |
1533 | ||
1534 | bond->slave_cnt++; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * This function detaches the slave from the list. | |
1539 | * WARNING: no check is made to verify if the slave effectively | |
1540 | * belongs to <bond>. | |
1541 | * Nothing is freed on return, structures are just unchained. | |
1542 | * If any slave pointer in bond was pointing to <slave>, | |
1543 | * it should be changed by the calling function. | |
1544 | * | |
1545 | * bond->lock held for writing by caller. | |
1546 | */ | |
1547 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1548 | { | |
1549 | if (slave->next) { | |
1550 | slave->next->prev = slave->prev; | |
1551 | } | |
1552 | ||
1553 | if (slave->prev) { | |
1554 | slave->prev->next = slave->next; | |
1555 | } | |
1556 | ||
1557 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1558 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1559 | bond->first_slave = slave->next; | |
1560 | } else { | |
1561 | bond->first_slave = NULL; /* slave was the last one */ | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | slave->next = NULL; | |
1566 | slave->prev = NULL; | |
1567 | bond->slave_cnt--; | |
1568 | } | |
1569 | ||
1570 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1571 | ||
1572 | static int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) | |
1573 | { | |
1574 | dprintk("bond_dev=%p\n", bond_dev); | |
1575 | dprintk("slave_dev=%p\n", slave_dev); | |
1576 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1577 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | /* enslave device <slave> to bond device <master> */ | |
1582 | static int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) | |
1583 | { | |
1584 | struct bonding *bond = bond_dev->priv; | |
1585 | struct slave *new_slave = NULL; | |
1586 | struct dev_mc_list *dmi; | |
1587 | struct sockaddr addr; | |
1588 | int link_reporting; | |
1589 | int old_features = bond_dev->features; | |
1590 | int res = 0; | |
1591 | ||
1592 | if (slave_dev->do_ioctl == NULL) { | |
1593 | printk(KERN_WARNING DRV_NAME | |
1594 | ": Warning : no link monitoring support for %s\n", | |
1595 | slave_dev->name); | |
1596 | } | |
1597 | ||
1598 | /* bond must be initialized by bond_open() before enslaving */ | |
1599 | if (!(bond_dev->flags & IFF_UP)) { | |
1600 | dprintk("Error, master_dev is not up\n"); | |
1601 | return -EPERM; | |
1602 | } | |
1603 | ||
1604 | /* already enslaved */ | |
1605 | if (slave_dev->flags & IFF_SLAVE) { | |
1606 | dprintk("Error, Device was already enslaved\n"); | |
1607 | return -EBUSY; | |
1608 | } | |
1609 | ||
1610 | /* vlan challenged mutual exclusion */ | |
1611 | /* no need to lock since we're protected by rtnl_lock */ | |
1612 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1613 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1614 | if (!list_empty(&bond->vlan_list)) { | |
1615 | printk(KERN_ERR DRV_NAME | |
1616 | ": Error: cannot enslave VLAN " | |
1617 | "challenged slave %s on VLAN enabled " | |
1618 | "bond %s\n", slave_dev->name, | |
1619 | bond_dev->name); | |
1620 | return -EPERM; | |
1621 | } else { | |
1622 | printk(KERN_WARNING DRV_NAME | |
1623 | ": Warning: enslaved VLAN challenged " | |
1624 | "slave %s. Adding VLANs will be blocked as " | |
1625 | "long as %s is part of bond %s\n", | |
1626 | slave_dev->name, slave_dev->name, | |
1627 | bond_dev->name); | |
1628 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1629 | } | |
1630 | } else { | |
1631 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1632 | if (bond->slave_cnt == 0) { | |
1633 | /* First slave, and it is not VLAN challenged, | |
1634 | * so remove the block of adding VLANs over the bond. | |
1635 | */ | |
1636 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | if (app_abi_ver >= 1) { | |
1641 | /* The application is using an ABI, which requires the | |
1642 | * slave interface to be closed. | |
1643 | */ | |
1644 | if ((slave_dev->flags & IFF_UP)) { | |
1645 | printk(KERN_ERR DRV_NAME | |
1646 | ": Error: %s is up\n", | |
1647 | slave_dev->name); | |
1648 | res = -EPERM; | |
1649 | goto err_undo_flags; | |
1650 | } | |
1651 | ||
1652 | if (slave_dev->set_mac_address == NULL) { | |
1653 | printk(KERN_ERR DRV_NAME | |
1654 | ": Error: The slave device you specified does " | |
1655 | "not support setting the MAC address.\n"); | |
1656 | printk(KERN_ERR | |
1657 | "Your kernel likely does not support slave " | |
1658 | "devices.\n"); | |
1659 | ||
1660 | res = -EOPNOTSUPP; | |
1661 | goto err_undo_flags; | |
1662 | } | |
1663 | } else { | |
1664 | /* The application is not using an ABI, which requires the | |
1665 | * slave interface to be open. | |
1666 | */ | |
1667 | if (!(slave_dev->flags & IFF_UP)) { | |
1668 | printk(KERN_ERR DRV_NAME | |
1669 | ": Error: %s is not running\n", | |
1670 | slave_dev->name); | |
1671 | res = -EINVAL; | |
1672 | goto err_undo_flags; | |
1673 | } | |
1674 | ||
1675 | if ((bond->params.mode == BOND_MODE_8023AD) || | |
1676 | (bond->params.mode == BOND_MODE_TLB) || | |
1677 | (bond->params.mode == BOND_MODE_ALB)) { | |
1678 | printk(KERN_ERR DRV_NAME | |
1679 | ": Error: to use %s mode, you must upgrade " | |
1680 | "ifenslave.\n", | |
1681 | bond_mode_name(bond->params.mode)); | |
1682 | res = -EOPNOTSUPP; | |
1683 | goto err_undo_flags; | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); | |
1688 | if (!new_slave) { | |
1689 | res = -ENOMEM; | |
1690 | goto err_undo_flags; | |
1691 | } | |
1692 | ||
1693 | memset(new_slave, 0, sizeof(struct slave)); | |
1694 | ||
1695 | /* save slave's original flags before calling | |
1696 | * netdev_set_master and dev_open | |
1697 | */ | |
1698 | new_slave->original_flags = slave_dev->flags; | |
1699 | ||
1700 | if (app_abi_ver >= 1) { | |
1701 | /* save slave's original ("permanent") mac address for | |
1702 | * modes that needs it, and for restoring it upon release, | |
1703 | * and then set it to the master's address | |
1704 | */ | |
1705 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1706 | ||
1707 | /* set slave to master's mac address | |
1708 | * The application already set the master's | |
1709 | * mac address to that of the first slave | |
1710 | */ | |
1711 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1712 | addr.sa_family = slave_dev->type; | |
1713 | res = dev_set_mac_address(slave_dev, &addr); | |
1714 | if (res) { | |
1715 | dprintk("Error %d calling set_mac_address\n", res); | |
1716 | goto err_free; | |
1717 | } | |
1718 | ||
1719 | /* open the slave since the application closed it */ | |
1720 | res = dev_open(slave_dev); | |
1721 | if (res) { | |
1722 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
1723 | goto err_restore_mac; | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | res = netdev_set_master(slave_dev, bond_dev); | |
1728 | if (res) { | |
1729 | dprintk("Error %d calling netdev_set_master\n", res); | |
1730 | if (app_abi_ver < 1) { | |
1731 | goto err_free; | |
1732 | } else { | |
1733 | goto err_close; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | new_slave->dev = slave_dev; | |
1738 | ||
1739 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1740 | (bond->params.mode == BOND_MODE_ALB)) { | |
1741 | /* bond_alb_init_slave() must be called before all other stages since | |
1742 | * it might fail and we do not want to have to undo everything | |
1743 | */ | |
1744 | res = bond_alb_init_slave(bond, new_slave); | |
1745 | if (res) { | |
1746 | goto err_unset_master; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1751 | * master's promisc (and mc) settings only if it becomes the | |
1752 | * curr_active_slave, and that is taken care of later when calling | |
1753 | * bond_change_active() | |
1754 | */ | |
1755 | if (!USES_PRIMARY(bond->params.mode)) { | |
1756 | /* set promiscuity level to new slave */ | |
1757 | if (bond_dev->flags & IFF_PROMISC) { | |
1758 | dev_set_promiscuity(slave_dev, 1); | |
1759 | } | |
1760 | ||
1761 | /* set allmulti level to new slave */ | |
1762 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1763 | dev_set_allmulti(slave_dev, 1); | |
1764 | } | |
1765 | ||
1766 | /* upload master's mc_list to new slave */ | |
1767 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1768 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1773 | /* add lacpdu mc addr to mc list */ | |
1774 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1775 | ||
1776 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1777 | } | |
1778 | ||
1779 | bond_add_vlans_on_slave(bond, slave_dev); | |
1780 | ||
1781 | write_lock_bh(&bond->lock); | |
1782 | ||
1783 | bond_attach_slave(bond, new_slave); | |
1784 | ||
1785 | new_slave->delay = 0; | |
1786 | new_slave->link_failure_count = 0; | |
1787 | ||
1788 | if (bond->params.miimon && !bond->params.use_carrier) { | |
1789 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1790 | ||
1791 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1792 | /* | |
1793 | * miimon is set but a bonded network driver | |
1794 | * does not support ETHTOOL/MII and | |
1795 | * arp_interval is not set. Note: if | |
1796 | * use_carrier is enabled, we will never go | |
1797 | * here (because netif_carrier is always | |
1798 | * supported); thus, we don't need to change | |
1799 | * the messages for netif_carrier. | |
1800 | */ | |
1801 | printk(KERN_WARNING DRV_NAME | |
1802 | ": Warning: MII and ETHTOOL support not " | |
1803 | "available for interface %s, and " | |
1804 | "arp_interval/arp_ip_target module parameters " | |
1805 | "not specified, thus bonding will not detect " | |
1806 | "link failures! see bonding.txt for details.\n", | |
1807 | slave_dev->name); | |
1808 | } else if (link_reporting == -1) { | |
1809 | /* unable get link status using mii/ethtool */ | |
1810 | printk(KERN_WARNING DRV_NAME | |
1811 | ": Warning: can't get link status from " | |
1812 | "interface %s; the network driver associated " | |
1813 | "with this interface does not support MII or " | |
1814 | "ETHTOOL link status reporting, thus miimon " | |
1815 | "has no effect on this interface.\n", | |
1816 | slave_dev->name); | |
1817 | } | |
1818 | } | |
1819 | ||
1820 | /* check for initial state */ | |
1821 | if (!bond->params.miimon || | |
1822 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1823 | if (bond->params.updelay) { | |
1824 | dprintk("Initial state of slave_dev is " | |
1825 | "BOND_LINK_BACK\n"); | |
1826 | new_slave->link = BOND_LINK_BACK; | |
1827 | new_slave->delay = bond->params.updelay; | |
1828 | } else { | |
1829 | dprintk("Initial state of slave_dev is " | |
1830 | "BOND_LINK_UP\n"); | |
1831 | new_slave->link = BOND_LINK_UP; | |
1832 | } | |
1833 | new_slave->jiffies = jiffies; | |
1834 | } else { | |
1835 | dprintk("Initial state of slave_dev is " | |
1836 | "BOND_LINK_DOWN\n"); | |
1837 | new_slave->link = BOND_LINK_DOWN; | |
1838 | } | |
1839 | ||
1840 | if (bond_update_speed_duplex(new_slave) && | |
1841 | (new_slave->link != BOND_LINK_DOWN)) { | |
1842 | printk(KERN_WARNING DRV_NAME | |
1843 | ": Warning: failed to get speed and duplex from %s, " | |
1844 | "assumed to be 100Mb/sec and Full.\n", | |
1845 | new_slave->dev->name); | |
1846 | ||
1847 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1848 | printk(KERN_WARNING | |
1849 | "Operation of 802.3ad mode requires ETHTOOL " | |
1850 | "support in base driver for proper aggregator " | |
1851 | "selection.\n"); | |
1852 | } | |
1853 | } | |
1854 | ||
1855 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1856 | /* if there is a primary slave, remember it */ | |
1857 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1858 | bond->primary_slave = new_slave; | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | switch (bond->params.mode) { | |
1863 | case BOND_MODE_ACTIVEBACKUP: | |
1864 | /* if we're in active-backup mode, we need one and only one active | |
1865 | * interface. The backup interfaces will have their NOARP flag set | |
1866 | * because we need them to be completely deaf and not to respond to | |
1867 | * any ARP request on the network to avoid fooling a switch. Thus, | |
1868 | * since we guarantee that curr_active_slave always point to the last | |
1869 | * usable interface, we just have to verify this interface's flag. | |
1870 | */ | |
1871 | if (((!bond->curr_active_slave) || | |
1872 | (bond->curr_active_slave->dev->flags & IFF_NOARP)) && | |
1873 | (new_slave->link != BOND_LINK_DOWN)) { | |
1874 | dprintk("This is the first active slave\n"); | |
1875 | /* first slave or no active slave yet, and this link | |
1876 | is OK, so make this interface the active one */ | |
1877 | bond_change_active_slave(bond, new_slave); | |
1878 | } else { | |
1879 | dprintk("This is just a backup slave\n"); | |
1880 | bond_set_slave_inactive_flags(new_slave); | |
1881 | } | |
1882 | break; | |
1883 | case BOND_MODE_8023AD: | |
1884 | /* in 802.3ad mode, the internal mechanism | |
1885 | * will activate the slaves in the selected | |
1886 | * aggregator | |
1887 | */ | |
1888 | bond_set_slave_inactive_flags(new_slave); | |
1889 | /* if this is the first slave */ | |
1890 | if (bond->slave_cnt == 1) { | |
1891 | SLAVE_AD_INFO(new_slave).id = 1; | |
1892 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1893 | * can be called only after the mac address of the bond is set | |
1894 | */ | |
1895 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1896 | bond->params.lacp_fast); | |
1897 | } else { | |
1898 | SLAVE_AD_INFO(new_slave).id = | |
1899 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1900 | } | |
1901 | ||
1902 | bond_3ad_bind_slave(new_slave); | |
1903 | break; | |
1904 | case BOND_MODE_TLB: | |
1905 | case BOND_MODE_ALB: | |
1906 | new_slave->state = BOND_STATE_ACTIVE; | |
1907 | if ((!bond->curr_active_slave) && | |
1908 | (new_slave->link != BOND_LINK_DOWN)) { | |
1909 | /* first slave or no active slave yet, and this link | |
1910 | * is OK, so make this interface the active one | |
1911 | */ | |
1912 | bond_change_active_slave(bond, new_slave); | |
1913 | } | |
1914 | break; | |
1915 | default: | |
1916 | dprintk("This slave is always active in trunk mode\n"); | |
1917 | ||
1918 | /* always active in trunk mode */ | |
1919 | new_slave->state = BOND_STATE_ACTIVE; | |
1920 | ||
1921 | /* In trunking mode there is little meaning to curr_active_slave | |
1922 | * anyway (it holds no special properties of the bond device), | |
1923 | * so we can change it without calling change_active_interface() | |
1924 | */ | |
1925 | if (!bond->curr_active_slave) { | |
1926 | bond->curr_active_slave = new_slave; | |
1927 | } | |
1928 | break; | |
1929 | } /* switch(bond_mode) */ | |
1930 | ||
1931 | write_unlock_bh(&bond->lock); | |
1932 | ||
1933 | if (app_abi_ver < 1) { | |
1934 | /* | |
1935 | * !!! This is to support old versions of ifenslave. | |
1936 | * We can remove this in 2.5 because our ifenslave takes | |
1937 | * care of this for us. | |
1938 | * We check to see if the master has a mac address yet. | |
1939 | * If not, we'll give it the mac address of our slave device. | |
1940 | */ | |
1941 | int ndx = 0; | |
1942 | ||
1943 | for (ndx = 0; ndx < bond_dev->addr_len; ndx++) { | |
1944 | dprintk("Checking ndx=%d of bond_dev->dev_addr\n", | |
1945 | ndx); | |
1946 | if (bond_dev->dev_addr[ndx] != 0) { | |
1947 | dprintk("Found non-zero byte at ndx=%d\n", | |
1948 | ndx); | |
1949 | break; | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | if (ndx == bond_dev->addr_len) { | |
1954 | /* | |
1955 | * We got all the way through the address and it was | |
1956 | * all 0's. | |
1957 | */ | |
1958 | dprintk("%s doesn't have a MAC address yet. \n", | |
1959 | bond_dev->name); | |
1960 | dprintk("Going to give assign it from %s.\n", | |
1961 | slave_dev->name); | |
1962 | bond_sethwaddr(bond_dev, slave_dev); | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | printk(KERN_INFO DRV_NAME | |
1967 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1968 | bond_dev->name, slave_dev->name, | |
1969 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1970 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1971 | ||
1972 | /* enslave is successful */ | |
1973 | return 0; | |
1974 | ||
1975 | /* Undo stages on error */ | |
1976 | err_unset_master: | |
1977 | netdev_set_master(slave_dev, NULL); | |
1978 | ||
1979 | err_close: | |
1980 | dev_close(slave_dev); | |
1981 | ||
1982 | err_restore_mac: | |
1983 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); | |
1984 | addr.sa_family = slave_dev->type; | |
1985 | dev_set_mac_address(slave_dev, &addr); | |
1986 | ||
1987 | err_free: | |
1988 | kfree(new_slave); | |
1989 | ||
1990 | err_undo_flags: | |
1991 | bond_dev->features = old_features; | |
1992 | ||
1993 | return res; | |
1994 | } | |
1995 | ||
1996 | /* | |
1997 | * Try to release the slave device <slave> from the bond device <master> | |
1998 | * It is legal to access curr_active_slave without a lock because all the function | |
1999 | * is write-locked. | |
2000 | * | |
2001 | * The rules for slave state should be: | |
2002 | * for Active/Backup: | |
2003 | * Active stays on all backups go down | |
2004 | * for Bonded connections: | |
2005 | * The first up interface should be left on and all others downed. | |
2006 | */ | |
2007 | static int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) | |
2008 | { | |
2009 | struct bonding *bond = bond_dev->priv; | |
2010 | struct slave *slave, *oldcurrent; | |
2011 | struct sockaddr addr; | |
2012 | int mac_addr_differ; | |
2013 | ||
2014 | /* slave is not a slave or master is not master of this slave */ | |
2015 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2016 | (slave_dev->master != bond_dev)) { | |
2017 | printk(KERN_ERR DRV_NAME | |
2018 | ": Error: %s: cannot release %s.\n", | |
2019 | bond_dev->name, slave_dev->name); | |
2020 | return -EINVAL; | |
2021 | } | |
2022 | ||
2023 | write_lock_bh(&bond->lock); | |
2024 | ||
2025 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
2026 | if (!slave) { | |
2027 | /* not a slave of this bond */ | |
2028 | printk(KERN_INFO DRV_NAME | |
2029 | ": %s: %s not enslaved\n", | |
2030 | bond_dev->name, slave_dev->name); | |
2031 | return -EINVAL; | |
2032 | } | |
2033 | ||
2034 | mac_addr_differ = memcmp(bond_dev->dev_addr, | |
2035 | slave->perm_hwaddr, | |
2036 | ETH_ALEN); | |
2037 | if (!mac_addr_differ && (bond->slave_cnt > 1)) { | |
2038 | printk(KERN_WARNING DRV_NAME | |
2039 | ": Warning: the permanent HWaddr of %s " | |
2040 | "- %02X:%02X:%02X:%02X:%02X:%02X - is " | |
2041 | "still in use by %s. Set the HWaddr of " | |
2042 | "%s to a different address to avoid " | |
2043 | "conflicts.\n", | |
2044 | slave_dev->name, | |
2045 | slave->perm_hwaddr[0], | |
2046 | slave->perm_hwaddr[1], | |
2047 | slave->perm_hwaddr[2], | |
2048 | slave->perm_hwaddr[3], | |
2049 | slave->perm_hwaddr[4], | |
2050 | slave->perm_hwaddr[5], | |
2051 | bond_dev->name, | |
2052 | slave_dev->name); | |
2053 | } | |
2054 | ||
2055 | /* Inform AD package of unbinding of slave. */ | |
2056 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2057 | /* must be called before the slave is | |
2058 | * detached from the list | |
2059 | */ | |
2060 | bond_3ad_unbind_slave(slave); | |
2061 | } | |
2062 | ||
2063 | printk(KERN_INFO DRV_NAME | |
2064 | ": %s: releasing %s interface %s\n", | |
2065 | bond_dev->name, | |
2066 | (slave->state == BOND_STATE_ACTIVE) | |
2067 | ? "active" : "backup", | |
2068 | slave_dev->name); | |
2069 | ||
2070 | oldcurrent = bond->curr_active_slave; | |
2071 | ||
2072 | bond->current_arp_slave = NULL; | |
2073 | ||
2074 | /* release the slave from its bond */ | |
2075 | bond_detach_slave(bond, slave); | |
2076 | ||
2077 | if (bond->primary_slave == slave) { | |
2078 | bond->primary_slave = NULL; | |
2079 | } | |
2080 | ||
2081 | if (oldcurrent == slave) { | |
2082 | bond_change_active_slave(bond, NULL); | |
2083 | } | |
2084 | ||
2085 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2086 | (bond->params.mode == BOND_MODE_ALB)) { | |
2087 | /* Must be called only after the slave has been | |
2088 | * detached from the list and the curr_active_slave | |
2089 | * has been cleared (if our_slave == old_current), | |
2090 | * but before a new active slave is selected. | |
2091 | */ | |
2092 | bond_alb_deinit_slave(bond, slave); | |
2093 | } | |
2094 | ||
2095 | if (oldcurrent == slave) { | |
2096 | bond_select_active_slave(bond); | |
2097 | ||
2098 | if (!bond->curr_active_slave) { | |
2099 | printk(KERN_INFO DRV_NAME | |
2100 | ": %s: now running without any active " | |
2101 | "interface !\n", | |
2102 | bond_dev->name); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | if (bond->slave_cnt == 0) { | |
2107 | /* if the last slave was removed, zero the mac address | |
2108 | * of the master so it will be set by the application | |
2109 | * to the mac address of the first slave | |
2110 | */ | |
2111 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2112 | ||
2113 | if (list_empty(&bond->vlan_list)) { | |
2114 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2115 | } else { | |
2116 | printk(KERN_WARNING DRV_NAME | |
2117 | ": Warning: clearing HW address of %s while it " | |
2118 | "still has VLANs.\n", | |
2119 | bond_dev->name); | |
2120 | printk(KERN_WARNING DRV_NAME | |
2121 | ": When re-adding slaves, make sure the bond's " | |
2122 | "HW address matches its VLANs'.\n"); | |
2123 | } | |
2124 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2125 | !bond_has_challenged_slaves(bond)) { | |
2126 | printk(KERN_INFO DRV_NAME | |
2127 | ": last VLAN challenged slave %s " | |
2128 | "left bond %s. VLAN blocking is removed\n", | |
2129 | slave_dev->name, bond_dev->name); | |
2130 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
2131 | } | |
2132 | ||
2133 | write_unlock_bh(&bond->lock); | |
2134 | ||
2135 | bond_del_vlans_from_slave(bond, slave_dev); | |
2136 | ||
2137 | /* If the mode USES_PRIMARY, then we should only remove its | |
2138 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2139 | * already taken care of above when we detached the slave | |
2140 | */ | |
2141 | if (!USES_PRIMARY(bond->params.mode)) { | |
2142 | /* unset promiscuity level from slave */ | |
2143 | if (bond_dev->flags & IFF_PROMISC) { | |
2144 | dev_set_promiscuity(slave_dev, -1); | |
2145 | } | |
2146 | ||
2147 | /* unset allmulti level from slave */ | |
2148 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2149 | dev_set_allmulti(slave_dev, -1); | |
2150 | } | |
2151 | ||
2152 | /* flush master's mc_list from slave */ | |
2153 | bond_mc_list_flush(bond_dev, slave_dev); | |
2154 | } | |
2155 | ||
2156 | netdev_set_master(slave_dev, NULL); | |
2157 | ||
2158 | /* close slave before restoring its mac address */ | |
2159 | dev_close(slave_dev); | |
2160 | ||
2161 | if (app_abi_ver >= 1) { | |
2162 | /* restore original ("permanent") mac address */ | |
2163 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2164 | addr.sa_family = slave_dev->type; | |
2165 | dev_set_mac_address(slave_dev, &addr); | |
2166 | } | |
2167 | ||
2168 | /* restore the original state of the | |
2169 | * IFF_NOARP flag that might have been | |
2170 | * set by bond_set_slave_inactive_flags() | |
2171 | */ | |
2172 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2173 | slave_dev->flags &= ~IFF_NOARP; | |
2174 | } | |
2175 | ||
2176 | kfree(slave); | |
2177 | ||
2178 | return 0; /* deletion OK */ | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | * This function releases all slaves. | |
2183 | */ | |
2184 | static int bond_release_all(struct net_device *bond_dev) | |
2185 | { | |
2186 | struct bonding *bond = bond_dev->priv; | |
2187 | struct slave *slave; | |
2188 | struct net_device *slave_dev; | |
2189 | struct sockaddr addr; | |
2190 | ||
2191 | write_lock_bh(&bond->lock); | |
2192 | ||
2193 | if (bond->slave_cnt == 0) { | |
2194 | goto out; | |
2195 | } | |
2196 | ||
2197 | bond->current_arp_slave = NULL; | |
2198 | bond->primary_slave = NULL; | |
2199 | bond_change_active_slave(bond, NULL); | |
2200 | ||
2201 | while ((slave = bond->first_slave) != NULL) { | |
2202 | /* Inform AD package of unbinding of slave | |
2203 | * before slave is detached from the list. | |
2204 | */ | |
2205 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2206 | bond_3ad_unbind_slave(slave); | |
2207 | } | |
2208 | ||
2209 | slave_dev = slave->dev; | |
2210 | bond_detach_slave(bond, slave); | |
2211 | ||
2212 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2213 | (bond->params.mode == BOND_MODE_ALB)) { | |
2214 | /* must be called only after the slave | |
2215 | * has been detached from the list | |
2216 | */ | |
2217 | bond_alb_deinit_slave(bond, slave); | |
2218 | } | |
2219 | ||
2220 | /* now that the slave is detached, unlock and perform | |
2221 | * all the undo steps that should not be called from | |
2222 | * within a lock. | |
2223 | */ | |
2224 | write_unlock_bh(&bond->lock); | |
2225 | ||
2226 | bond_del_vlans_from_slave(bond, slave_dev); | |
2227 | ||
2228 | /* If the mode USES_PRIMARY, then we should only remove its | |
2229 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2230 | * already taken care of above when we detached the slave | |
2231 | */ | |
2232 | if (!USES_PRIMARY(bond->params.mode)) { | |
2233 | /* unset promiscuity level from slave */ | |
2234 | if (bond_dev->flags & IFF_PROMISC) { | |
2235 | dev_set_promiscuity(slave_dev, -1); | |
2236 | } | |
2237 | ||
2238 | /* unset allmulti level from slave */ | |
2239 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2240 | dev_set_allmulti(slave_dev, -1); | |
2241 | } | |
2242 | ||
2243 | /* flush master's mc_list from slave */ | |
2244 | bond_mc_list_flush(bond_dev, slave_dev); | |
2245 | } | |
2246 | ||
2247 | netdev_set_master(slave_dev, NULL); | |
2248 | ||
2249 | /* close slave before restoring its mac address */ | |
2250 | dev_close(slave_dev); | |
2251 | ||
2252 | if (app_abi_ver >= 1) { | |
2253 | /* restore original ("permanent") mac address*/ | |
2254 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2255 | addr.sa_family = slave_dev->type; | |
2256 | dev_set_mac_address(slave_dev, &addr); | |
2257 | } | |
2258 | ||
2259 | /* restore the original state of the IFF_NOARP flag that might have | |
2260 | * been set by bond_set_slave_inactive_flags() | |
2261 | */ | |
2262 | if ((slave->original_flags & IFF_NOARP) == 0) { | |
2263 | slave_dev->flags &= ~IFF_NOARP; | |
2264 | } | |
2265 | ||
2266 | kfree(slave); | |
2267 | ||
2268 | /* re-acquire the lock before getting the next slave */ | |
2269 | write_lock_bh(&bond->lock); | |
2270 | } | |
2271 | ||
2272 | /* zero the mac address of the master so it will be | |
2273 | * set by the application to the mac address of the | |
2274 | * first slave | |
2275 | */ | |
2276 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2277 | ||
2278 | if (list_empty(&bond->vlan_list)) { | |
2279 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2280 | } else { | |
2281 | printk(KERN_WARNING DRV_NAME | |
2282 | ": Warning: clearing HW address of %s while it " | |
2283 | "still has VLANs.\n", | |
2284 | bond_dev->name); | |
2285 | printk(KERN_WARNING DRV_NAME | |
2286 | ": When re-adding slaves, make sure the bond's " | |
2287 | "HW address matches its VLANs'.\n"); | |
2288 | } | |
2289 | ||
2290 | printk(KERN_INFO DRV_NAME | |
2291 | ": %s: released all slaves\n", | |
2292 | bond_dev->name); | |
2293 | ||
2294 | out: | |
2295 | write_unlock_bh(&bond->lock); | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | * This function changes the active slave to slave <slave_dev>. | |
2302 | * It returns -EINVAL in the following cases. | |
2303 | * - <slave_dev> is not found in the list. | |
2304 | * - There is not active slave now. | |
2305 | * - <slave_dev> is already active. | |
2306 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2307 | * - <slave_dev> is not running. | |
2308 | * In these cases, this fuction does nothing. | |
2309 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
2310 | */ | |
2311 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2312 | { | |
2313 | struct bonding *bond = bond_dev->priv; | |
2314 | struct slave *old_active = NULL; | |
2315 | struct slave *new_active = NULL; | |
2316 | int res = 0; | |
2317 | ||
2318 | if (!USES_PRIMARY(bond->params.mode)) { | |
2319 | return -EINVAL; | |
2320 | } | |
2321 | ||
2322 | /* Verify that master_dev is indeed the master of slave_dev */ | |
2323 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2324 | (slave_dev->master != bond_dev)) { | |
2325 | return -EINVAL; | |
2326 | } | |
2327 | ||
2328 | write_lock_bh(&bond->lock); | |
2329 | ||
2330 | old_active = bond->curr_active_slave; | |
2331 | new_active = bond_get_slave_by_dev(bond, slave_dev); | |
2332 | ||
2333 | /* | |
2334 | * Changing to the current active: do nothing; return success. | |
2335 | */ | |
2336 | if (new_active && (new_active == old_active)) { | |
2337 | write_unlock_bh(&bond->lock); | |
2338 | return 0; | |
2339 | } | |
2340 | ||
2341 | if ((new_active) && | |
2342 | (old_active) && | |
2343 | (new_active->link == BOND_LINK_UP) && | |
2344 | IS_UP(new_active->dev)) { | |
2345 | bond_change_active_slave(bond, new_active); | |
2346 | } else { | |
2347 | res = -EINVAL; | |
2348 | } | |
2349 | ||
2350 | write_unlock_bh(&bond->lock); | |
2351 | ||
2352 | return res; | |
2353 | } | |
2354 | ||
2355 | static int bond_ethtool_ioctl(struct net_device *bond_dev, struct ifreq *ifr) | |
2356 | { | |
2357 | struct ethtool_drvinfo info; | |
2358 | void __user *addr = ifr->ifr_data; | |
2359 | uint32_t cmd; | |
2360 | ||
2361 | if (get_user(cmd, (uint32_t __user *)addr)) { | |
2362 | return -EFAULT; | |
2363 | } | |
2364 | ||
2365 | switch (cmd) { | |
2366 | case ETHTOOL_GDRVINFO: | |
2367 | if (copy_from_user(&info, addr, sizeof(info))) { | |
2368 | return -EFAULT; | |
2369 | } | |
2370 | ||
2371 | if (strcmp(info.driver, "ifenslave") == 0) { | |
2372 | int new_abi_ver; | |
2373 | char *endptr; | |
2374 | ||
2375 | new_abi_ver = simple_strtoul(info.fw_version, | |
2376 | &endptr, 0); | |
2377 | if (*endptr) { | |
2378 | printk(KERN_ERR DRV_NAME | |
2379 | ": Error: got invalid ABI " | |
2380 | "version from application\n"); | |
2381 | ||
2382 | return -EINVAL; | |
2383 | } | |
2384 | ||
2385 | if (orig_app_abi_ver == -1) { | |
2386 | orig_app_abi_ver = new_abi_ver; | |
2387 | } | |
2388 | ||
2389 | app_abi_ver = new_abi_ver; | |
2390 | } | |
2391 | ||
2392 | strncpy(info.driver, DRV_NAME, 32); | |
2393 | strncpy(info.version, DRV_VERSION, 32); | |
2394 | snprintf(info.fw_version, 32, "%d", BOND_ABI_VERSION); | |
2395 | ||
2396 | if (copy_to_user(addr, &info, sizeof(info))) { | |
2397 | return -EFAULT; | |
2398 | } | |
2399 | ||
2400 | return 0; | |
2401 | default: | |
2402 | return -EOPNOTSUPP; | |
2403 | } | |
2404 | } | |
2405 | ||
2406 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) | |
2407 | { | |
2408 | struct bonding *bond = bond_dev->priv; | |
2409 | ||
2410 | info->bond_mode = bond->params.mode; | |
2411 | info->miimon = bond->params.miimon; | |
2412 | ||
2413 | read_lock_bh(&bond->lock); | |
2414 | info->num_slaves = bond->slave_cnt; | |
2415 | read_unlock_bh(&bond->lock); | |
2416 | ||
2417 | return 0; | |
2418 | } | |
2419 | ||
2420 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2421 | { | |
2422 | struct bonding *bond = bond_dev->priv; | |
2423 | struct slave *slave; | |
2424 | int i, found = 0; | |
2425 | ||
2426 | if (info->slave_id < 0) { | |
2427 | return -ENODEV; | |
2428 | } | |
2429 | ||
2430 | read_lock_bh(&bond->lock); | |
2431 | ||
2432 | bond_for_each_slave(bond, slave, i) { | |
2433 | if (i == (int)info->slave_id) { | |
2434 | found = 1; | |
2435 | break; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | read_unlock_bh(&bond->lock); | |
2440 | ||
2441 | if (found) { | |
2442 | strcpy(info->slave_name, slave->dev->name); | |
2443 | info->link = slave->link; | |
2444 | info->state = slave->state; | |
2445 | info->link_failure_count = slave->link_failure_count; | |
2446 | } else { | |
2447 | return -ENODEV; | |
2448 | } | |
2449 | ||
2450 | return 0; | |
2451 | } | |
2452 | ||
2453 | /*-------------------------------- Monitoring -------------------------------*/ | |
2454 | ||
2455 | /* this function is called regularly to monitor each slave's link. */ | |
2456 | static void bond_mii_monitor(struct net_device *bond_dev) | |
2457 | { | |
2458 | struct bonding *bond = bond_dev->priv; | |
2459 | struct slave *slave, *oldcurrent; | |
2460 | int do_failover = 0; | |
2461 | int delta_in_ticks; | |
2462 | int i; | |
2463 | ||
2464 | read_lock(&bond->lock); | |
2465 | ||
2466 | delta_in_ticks = (bond->params.miimon * HZ) / 1000; | |
2467 | ||
2468 | if (bond->kill_timers) { | |
2469 | goto out; | |
2470 | } | |
2471 | ||
2472 | if (bond->slave_cnt == 0) { | |
2473 | goto re_arm; | |
2474 | } | |
2475 | ||
2476 | /* we will try to read the link status of each of our slaves, and | |
2477 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2478 | * supporting MII status, we won't do anything so that a user-space | |
2479 | * program could monitor the link itself if needed. | |
2480 | */ | |
2481 | ||
2482 | read_lock(&bond->curr_slave_lock); | |
2483 | oldcurrent = bond->curr_active_slave; | |
2484 | read_unlock(&bond->curr_slave_lock); | |
2485 | ||
2486 | bond_for_each_slave(bond, slave, i) { | |
2487 | struct net_device *slave_dev = slave->dev; | |
2488 | int link_state; | |
2489 | u16 old_speed = slave->speed; | |
2490 | u8 old_duplex = slave->duplex; | |
2491 | ||
2492 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2493 | ||
2494 | switch (slave->link) { | |
2495 | case BOND_LINK_UP: /* the link was up */ | |
2496 | if (link_state == BMSR_LSTATUS) { | |
2497 | /* link stays up, nothing more to do */ | |
2498 | break; | |
2499 | } else { /* link going down */ | |
2500 | slave->link = BOND_LINK_FAIL; | |
2501 | slave->delay = bond->params.downdelay; | |
2502 | ||
2503 | if (slave->link_failure_count < UINT_MAX) { | |
2504 | slave->link_failure_count++; | |
2505 | } | |
2506 | ||
2507 | if (bond->params.downdelay) { | |
2508 | printk(KERN_INFO DRV_NAME | |
2509 | ": %s: link status down for %s " | |
2510 | "interface %s, disabling it in " | |
2511 | "%d ms.\n", | |
2512 | bond_dev->name, | |
2513 | IS_UP(slave_dev) | |
2514 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2515 | ? ((slave == oldcurrent) | |
2516 | ? "active " : "backup ") | |
2517 | : "") | |
2518 | : "idle ", | |
2519 | slave_dev->name, | |
2520 | bond->params.downdelay * bond->params.miimon); | |
2521 | } | |
2522 | } | |
2523 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2524 | ensure proper action to be taken | |
2525 | */ | |
2526 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2527 | if (link_state != BMSR_LSTATUS) { | |
2528 | /* link stays down */ | |
2529 | if (slave->delay <= 0) { | |
2530 | /* link down for too long time */ | |
2531 | slave->link = BOND_LINK_DOWN; | |
2532 | ||
2533 | /* in active/backup mode, we must | |
2534 | * completely disable this interface | |
2535 | */ | |
2536 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2537 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2538 | bond_set_slave_inactive_flags(slave); | |
2539 | } | |
2540 | ||
2541 | printk(KERN_INFO DRV_NAME | |
2542 | ": %s: link status definitely " | |
2543 | "down for interface %s, " | |
2544 | "disabling it\n", | |
2545 | bond_dev->name, | |
2546 | slave_dev->name); | |
2547 | ||
2548 | /* notify ad that the link status has changed */ | |
2549 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2550 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2551 | } | |
2552 | ||
2553 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2554 | (bond->params.mode == BOND_MODE_ALB)) { | |
2555 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2556 | } | |
2557 | ||
2558 | if (slave == oldcurrent) { | |
2559 | do_failover = 1; | |
2560 | } | |
2561 | } else { | |
2562 | slave->delay--; | |
2563 | } | |
2564 | } else { | |
2565 | /* link up again */ | |
2566 | slave->link = BOND_LINK_UP; | |
2567 | slave->jiffies = jiffies; | |
2568 | printk(KERN_INFO DRV_NAME | |
2569 | ": %s: link status up again after %d " | |
2570 | "ms for interface %s.\n", | |
2571 | bond_dev->name, | |
2572 | (bond->params.downdelay - slave->delay) * bond->params.miimon, | |
2573 | slave_dev->name); | |
2574 | } | |
2575 | break; | |
2576 | case BOND_LINK_DOWN: /* the link was down */ | |
2577 | if (link_state != BMSR_LSTATUS) { | |
2578 | /* the link stays down, nothing more to do */ | |
2579 | break; | |
2580 | } else { /* link going up */ | |
2581 | slave->link = BOND_LINK_BACK; | |
2582 | slave->delay = bond->params.updelay; | |
2583 | ||
2584 | if (bond->params.updelay) { | |
2585 | /* if updelay == 0, no need to | |
2586 | advertise about a 0 ms delay */ | |
2587 | printk(KERN_INFO DRV_NAME | |
2588 | ": %s: link status up for " | |
2589 | "interface %s, enabling it " | |
2590 | "in %d ms.\n", | |
2591 | bond_dev->name, | |
2592 | slave_dev->name, | |
2593 | bond->params.updelay * bond->params.miimon); | |
2594 | } | |
2595 | } | |
2596 | /* no break ! fall through the BOND_LINK_BACK state in | |
2597 | case there's something to do. | |
2598 | */ | |
2599 | case BOND_LINK_BACK: /* the link has just come back */ | |
2600 | if (link_state != BMSR_LSTATUS) { | |
2601 | /* link down again */ | |
2602 | slave->link = BOND_LINK_DOWN; | |
2603 | ||
2604 | printk(KERN_INFO DRV_NAME | |
2605 | ": %s: link status down again after %d " | |
2606 | "ms for interface %s.\n", | |
2607 | bond_dev->name, | |
2608 | (bond->params.updelay - slave->delay) * bond->params.miimon, | |
2609 | slave_dev->name); | |
2610 | } else { | |
2611 | /* link stays up */ | |
2612 | if (slave->delay == 0) { | |
2613 | /* now the link has been up for long time enough */ | |
2614 | slave->link = BOND_LINK_UP; | |
2615 | slave->jiffies = jiffies; | |
2616 | ||
2617 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2618 | /* prevent it from being the active one */ | |
2619 | slave->state = BOND_STATE_BACKUP; | |
2620 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2621 | /* make it immediately active */ | |
2622 | slave->state = BOND_STATE_ACTIVE; | |
2623 | } else if (slave != bond->primary_slave) { | |
2624 | /* prevent it from being the active one */ | |
2625 | slave->state = BOND_STATE_BACKUP; | |
2626 | } | |
2627 | ||
2628 | printk(KERN_INFO DRV_NAME | |
2629 | ": %s: link status definitely " | |
2630 | "up for interface %s.\n", | |
2631 | bond_dev->name, | |
2632 | slave_dev->name); | |
2633 | ||
2634 | /* notify ad that the link status has changed */ | |
2635 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2636 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2637 | } | |
2638 | ||
2639 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2640 | (bond->params.mode == BOND_MODE_ALB)) { | |
2641 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2642 | } | |
2643 | ||
2644 | if ((!oldcurrent) || | |
2645 | (slave == bond->primary_slave)) { | |
2646 | do_failover = 1; | |
2647 | } | |
2648 | } else { | |
2649 | slave->delay--; | |
2650 | } | |
2651 | } | |
2652 | break; | |
2653 | default: | |
2654 | /* Should not happen */ | |
2655 | printk(KERN_ERR "bonding: Error: %s Illegal value (link=%d)\n", | |
2656 | slave->dev->name, slave->link); | |
2657 | goto out; | |
2658 | } /* end of switch (slave->link) */ | |
2659 | ||
2660 | bond_update_speed_duplex(slave); | |
2661 | ||
2662 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2663 | if (old_speed != slave->speed) { | |
2664 | bond_3ad_adapter_speed_changed(slave); | |
2665 | } | |
2666 | ||
2667 | if (old_duplex != slave->duplex) { | |
2668 | bond_3ad_adapter_duplex_changed(slave); | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | } /* end of for */ | |
2673 | ||
2674 | if (do_failover) { | |
2675 | write_lock(&bond->curr_slave_lock); | |
2676 | ||
2677 | bond_select_active_slave(bond); | |
2678 | ||
2679 | if (oldcurrent && !bond->curr_active_slave) { | |
2680 | printk(KERN_INFO DRV_NAME | |
2681 | ": %s: now running without any active " | |
2682 | "interface !\n", | |
2683 | bond_dev->name); | |
2684 | } | |
2685 | ||
2686 | write_unlock(&bond->curr_slave_lock); | |
2687 | } | |
2688 | ||
2689 | re_arm: | |
2690 | if (bond->params.miimon) { | |
2691 | mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); | |
2692 | } | |
2693 | out: | |
2694 | read_unlock(&bond->lock); | |
2695 | } | |
2696 | ||
2697 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) | |
2698 | { | |
2699 | int i; | |
2700 | u32 *targets = bond->params.arp_targets; | |
2701 | ||
2702 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
2703 | arp_send(ARPOP_REQUEST, ETH_P_ARP, targets[i], slave->dev, | |
2704 | my_ip, NULL, slave->dev->dev_addr, | |
2705 | NULL); | |
2706 | } | |
2707 | } | |
2708 | ||
2709 | /* | |
2710 | * this function is called regularly to monitor each slave's link | |
2711 | * ensuring that traffic is being sent and received when arp monitoring | |
2712 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2713 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2714 | * arp monitoring in active backup mode. | |
2715 | */ | |
2716 | static void bond_loadbalance_arp_mon(struct net_device *bond_dev) | |
2717 | { | |
2718 | struct bonding *bond = bond_dev->priv; | |
2719 | struct slave *slave, *oldcurrent; | |
2720 | int do_failover = 0; | |
2721 | int delta_in_ticks; | |
2722 | int i; | |
2723 | ||
2724 | read_lock(&bond->lock); | |
2725 | ||
2726 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2727 | ||
2728 | if (bond->kill_timers) { | |
2729 | goto out; | |
2730 | } | |
2731 | ||
2732 | if (bond->slave_cnt == 0) { | |
2733 | goto re_arm; | |
2734 | } | |
2735 | ||
2736 | read_lock(&bond->curr_slave_lock); | |
2737 | oldcurrent = bond->curr_active_slave; | |
2738 | read_unlock(&bond->curr_slave_lock); | |
2739 | ||
2740 | /* see if any of the previous devices are up now (i.e. they have | |
2741 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2742 | * the picture unless it is null. also, slave->jiffies is not needed | |
2743 | * here because we send an arp on each slave and give a slave as | |
2744 | * long as it needs to get the tx/rx within the delta. | |
2745 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2746 | * so it can wait | |
2747 | */ | |
2748 | bond_for_each_slave(bond, slave, i) { | |
2749 | if (slave->link != BOND_LINK_UP) { | |
2750 | if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && | |
2751 | ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { | |
2752 | ||
2753 | slave->link = BOND_LINK_UP; | |
2754 | slave->state = BOND_STATE_ACTIVE; | |
2755 | ||
2756 | /* primary_slave has no meaning in round-robin | |
2757 | * mode. the window of a slave being up and | |
2758 | * curr_active_slave being null after enslaving | |
2759 | * is closed. | |
2760 | */ | |
2761 | if (!oldcurrent) { | |
2762 | printk(KERN_INFO DRV_NAME | |
2763 | ": %s: link status definitely " | |
2764 | "up for interface %s, ", | |
2765 | bond_dev->name, | |
2766 | slave->dev->name); | |
2767 | do_failover = 1; | |
2768 | } else { | |
2769 | printk(KERN_INFO DRV_NAME | |
2770 | ": %s: interface %s is now up\n", | |
2771 | bond_dev->name, | |
2772 | slave->dev->name); | |
2773 | } | |
2774 | } | |
2775 | } else { | |
2776 | /* slave->link == BOND_LINK_UP */ | |
2777 | ||
2778 | /* not all switches will respond to an arp request | |
2779 | * when the source ip is 0, so don't take the link down | |
2780 | * if we don't know our ip yet | |
2781 | */ | |
2782 | if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2783 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
2784 | my_ip)) { | |
2785 | ||
2786 | slave->link = BOND_LINK_DOWN; | |
2787 | slave->state = BOND_STATE_BACKUP; | |
2788 | ||
2789 | if (slave->link_failure_count < UINT_MAX) { | |
2790 | slave->link_failure_count++; | |
2791 | } | |
2792 | ||
2793 | printk(KERN_INFO DRV_NAME | |
2794 | ": %s: interface %s is now down.\n", | |
2795 | bond_dev->name, | |
2796 | slave->dev->name); | |
2797 | ||
2798 | if (slave == oldcurrent) { | |
2799 | do_failover = 1; | |
2800 | } | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | /* note: if switch is in round-robin mode, all links | |
2805 | * must tx arp to ensure all links rx an arp - otherwise | |
2806 | * links may oscillate or not come up at all; if switch is | |
2807 | * in something like xor mode, there is nothing we can | |
2808 | * do - all replies will be rx'ed on same link causing slaves | |
2809 | * to be unstable during low/no traffic periods | |
2810 | */ | |
2811 | if (IS_UP(slave->dev)) { | |
2812 | bond_arp_send_all(bond, slave); | |
2813 | } | |
2814 | } | |
2815 | ||
2816 | if (do_failover) { | |
2817 | write_lock(&bond->curr_slave_lock); | |
2818 | ||
2819 | bond_select_active_slave(bond); | |
2820 | ||
2821 | if (oldcurrent && !bond->curr_active_slave) { | |
2822 | printk(KERN_INFO DRV_NAME | |
2823 | ": %s: now running without any active " | |
2824 | "interface !\n", | |
2825 | bond_dev->name); | |
2826 | } | |
2827 | ||
2828 | write_unlock(&bond->curr_slave_lock); | |
2829 | } | |
2830 | ||
2831 | re_arm: | |
2832 | if (bond->params.arp_interval) { | |
2833 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2834 | } | |
2835 | out: | |
2836 | read_unlock(&bond->lock); | |
2837 | } | |
2838 | ||
2839 | /* | |
2840 | * When using arp monitoring in active-backup mode, this function is | |
2841 | * called to determine if any backup slaves have went down or a new | |
2842 | * current slave needs to be found. | |
2843 | * The backup slaves never generate traffic, they are considered up by merely | |
2844 | * receiving traffic. If the current slave goes down, each backup slave will | |
2845 | * be given the opportunity to tx/rx an arp before being taken down - this | |
2846 | * prevents all slaves from being taken down due to the current slave not | |
2847 | * sending any traffic for the backups to receive. The arps are not necessarily | |
2848 | * necessary, any tx and rx traffic will keep the current slave up. While any | |
2849 | * rx traffic will keep the backup slaves up, the current slave is responsible | |
2850 | * for generating traffic to keep them up regardless of any other traffic they | |
2851 | * may have received. | |
2852 | * see loadbalance_arp_monitor for arp monitoring in load balancing mode | |
2853 | */ | |
2854 | static void bond_activebackup_arp_mon(struct net_device *bond_dev) | |
2855 | { | |
2856 | struct bonding *bond = bond_dev->priv; | |
2857 | struct slave *slave; | |
2858 | int delta_in_ticks; | |
2859 | int i; | |
2860 | ||
2861 | read_lock(&bond->lock); | |
2862 | ||
2863 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2864 | ||
2865 | if (bond->kill_timers) { | |
2866 | goto out; | |
2867 | } | |
2868 | ||
2869 | if (bond->slave_cnt == 0) { | |
2870 | goto re_arm; | |
2871 | } | |
2872 | ||
2873 | /* determine if any slave has come up or any backup slave has | |
2874 | * gone down | |
2875 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2876 | * so it can wait | |
2877 | */ | |
2878 | bond_for_each_slave(bond, slave, i) { | |
2879 | if (slave->link != BOND_LINK_UP) { | |
2880 | if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) { | |
2881 | ||
2882 | slave->link = BOND_LINK_UP; | |
2883 | ||
2884 | write_lock(&bond->curr_slave_lock); | |
2885 | ||
2886 | if ((!bond->curr_active_slave) && | |
2887 | ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { | |
2888 | bond_change_active_slave(bond, slave); | |
2889 | bond->current_arp_slave = NULL; | |
2890 | } else if (bond->curr_active_slave != slave) { | |
2891 | /* this slave has just come up but we | |
2892 | * already have a current slave; this | |
2893 | * can also happen if bond_enslave adds | |
2894 | * a new slave that is up while we are | |
2895 | * searching for a new slave | |
2896 | */ | |
2897 | bond_set_slave_inactive_flags(slave); | |
2898 | bond->current_arp_slave = NULL; | |
2899 | } | |
2900 | ||
2901 | if (slave == bond->curr_active_slave) { | |
2902 | printk(KERN_INFO DRV_NAME | |
2903 | ": %s: %s is up and now the " | |
2904 | "active interface\n", | |
2905 | bond_dev->name, | |
2906 | slave->dev->name); | |
2907 | } else { | |
2908 | printk(KERN_INFO DRV_NAME | |
2909 | ": %s: backup interface %s is " | |
2910 | "now up\n", | |
2911 | bond_dev->name, | |
2912 | slave->dev->name); | |
2913 | } | |
2914 | ||
2915 | write_unlock(&bond->curr_slave_lock); | |
2916 | } | |
2917 | } else { | |
2918 | read_lock(&bond->curr_slave_lock); | |
2919 | ||
2920 | if ((slave != bond->curr_active_slave) && | |
2921 | (!bond->current_arp_slave) && | |
2922 | (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) && | |
2923 | my_ip)) { | |
2924 | /* a backup slave has gone down; three times | |
2925 | * the delta allows the current slave to be | |
2926 | * taken out before the backup slave. | |
2927 | * note: a non-null current_arp_slave indicates | |
2928 | * the curr_active_slave went down and we are | |
2929 | * searching for a new one; under this | |
2930 | * condition we only take the curr_active_slave | |
2931 | * down - this gives each slave a chance to | |
2932 | * tx/rx traffic before being taken out | |
2933 | */ | |
2934 | ||
2935 | read_unlock(&bond->curr_slave_lock); | |
2936 | ||
2937 | slave->link = BOND_LINK_DOWN; | |
2938 | ||
2939 | if (slave->link_failure_count < UINT_MAX) { | |
2940 | slave->link_failure_count++; | |
2941 | } | |
2942 | ||
2943 | bond_set_slave_inactive_flags(slave); | |
2944 | ||
2945 | printk(KERN_INFO DRV_NAME | |
2946 | ": %s: backup interface %s is now down\n", | |
2947 | bond_dev->name, | |
2948 | slave->dev->name); | |
2949 | } else { | |
2950 | read_unlock(&bond->curr_slave_lock); | |
2951 | } | |
2952 | } | |
2953 | } | |
2954 | ||
2955 | read_lock(&bond->curr_slave_lock); | |
2956 | slave = bond->curr_active_slave; | |
2957 | read_unlock(&bond->curr_slave_lock); | |
2958 | ||
2959 | if (slave) { | |
2960 | /* if we have sent traffic in the past 2*arp_intervals but | |
2961 | * haven't xmit and rx traffic in that time interval, select | |
2962 | * a different slave. slave->jiffies is only updated when | |
2963 | * a slave first becomes the curr_active_slave - not necessarily | |
2964 | * after every arp; this ensures the slave has a full 2*delta | |
2965 | * before being taken out. if a primary is being used, check | |
2966 | * if it is up and needs to take over as the curr_active_slave | |
2967 | */ | |
2968 | if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2969 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
2970 | my_ip)) && | |
2971 | ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { | |
2972 | ||
2973 | slave->link = BOND_LINK_DOWN; | |
2974 | ||
2975 | if (slave->link_failure_count < UINT_MAX) { | |
2976 | slave->link_failure_count++; | |
2977 | } | |
2978 | ||
2979 | printk(KERN_INFO DRV_NAME | |
2980 | ": %s: link status down for active interface " | |
2981 | "%s, disabling it\n", | |
2982 | bond_dev->name, | |
2983 | slave->dev->name); | |
2984 | ||
2985 | write_lock(&bond->curr_slave_lock); | |
2986 | ||
2987 | bond_select_active_slave(bond); | |
2988 | slave = bond->curr_active_slave; | |
2989 | ||
2990 | write_unlock(&bond->curr_slave_lock); | |
2991 | ||
2992 | bond->current_arp_slave = slave; | |
2993 | ||
2994 | if (slave) { | |
2995 | slave->jiffies = jiffies; | |
2996 | } | |
2997 | } else if ((bond->primary_slave) && | |
2998 | (bond->primary_slave != slave) && | |
2999 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3000 | /* at this point, slave is the curr_active_slave */ | |
3001 | printk(KERN_INFO DRV_NAME | |
3002 | ": %s: changing from interface %s to primary " | |
3003 | "interface %s\n", | |
3004 | bond_dev->name, | |
3005 | slave->dev->name, | |
3006 | bond->primary_slave->dev->name); | |
3007 | ||
3008 | /* primary is up so switch to it */ | |
3009 | write_lock(&bond->curr_slave_lock); | |
3010 | bond_change_active_slave(bond, bond->primary_slave); | |
3011 | write_unlock(&bond->curr_slave_lock); | |
3012 | ||
3013 | slave = bond->primary_slave; | |
3014 | slave->jiffies = jiffies; | |
3015 | } else { | |
3016 | bond->current_arp_slave = NULL; | |
3017 | } | |
3018 | ||
3019 | /* the current slave must tx an arp to ensure backup slaves | |
3020 | * rx traffic | |
3021 | */ | |
3022 | if (slave && my_ip) { | |
3023 | bond_arp_send_all(bond, slave); | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | /* if we don't have a curr_active_slave, search for the next available | |
3028 | * backup slave from the current_arp_slave and make it the candidate | |
3029 | * for becoming the curr_active_slave | |
3030 | */ | |
3031 | if (!slave) { | |
3032 | if (!bond->current_arp_slave) { | |
3033 | bond->current_arp_slave = bond->first_slave; | |
3034 | } | |
3035 | ||
3036 | if (bond->current_arp_slave) { | |
3037 | bond_set_slave_inactive_flags(bond->current_arp_slave); | |
3038 | ||
3039 | /* search for next candidate */ | |
3040 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave) { | |
3041 | if (IS_UP(slave->dev)) { | |
3042 | slave->link = BOND_LINK_BACK; | |
3043 | bond_set_slave_active_flags(slave); | |
3044 | bond_arp_send_all(bond, slave); | |
3045 | slave->jiffies = jiffies; | |
3046 | bond->current_arp_slave = slave; | |
3047 | break; | |
3048 | } | |
3049 | ||
3050 | /* if the link state is up at this point, we | |
3051 | * mark it down - this can happen if we have | |
3052 | * simultaneous link failures and | |
3053 | * reselect_active_interface doesn't make this | |
3054 | * one the current slave so it is still marked | |
3055 | * up when it is actually down | |
3056 | */ | |
3057 | if (slave->link == BOND_LINK_UP) { | |
3058 | slave->link = BOND_LINK_DOWN; | |
3059 | if (slave->link_failure_count < UINT_MAX) { | |
3060 | slave->link_failure_count++; | |
3061 | } | |
3062 | ||
3063 | bond_set_slave_inactive_flags(slave); | |
3064 | ||
3065 | printk(KERN_INFO DRV_NAME | |
3066 | ": %s: backup interface %s is " | |
3067 | "now down.\n", | |
3068 | bond_dev->name, | |
3069 | slave->dev->name); | |
3070 | } | |
3071 | } | |
3072 | } | |
3073 | } | |
3074 | ||
3075 | re_arm: | |
3076 | if (bond->params.arp_interval) { | |
3077 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
3078 | } | |
3079 | out: | |
3080 | read_unlock(&bond->lock); | |
3081 | } | |
3082 | ||
3083 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3084 | ||
3085 | #ifdef CONFIG_PROC_FS | |
3086 | ||
3087 | #define SEQ_START_TOKEN ((void *)1) | |
3088 | ||
3089 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) | |
3090 | { | |
3091 | struct bonding *bond = seq->private; | |
3092 | loff_t off = 0; | |
3093 | struct slave *slave; | |
3094 | int i; | |
3095 | ||
3096 | /* make sure the bond won't be taken away */ | |
3097 | read_lock(&dev_base_lock); | |
3098 | read_lock_bh(&bond->lock); | |
3099 | ||
3100 | if (*pos == 0) { | |
3101 | return SEQ_START_TOKEN; | |
3102 | } | |
3103 | ||
3104 | bond_for_each_slave(bond, slave, i) { | |
3105 | if (++off == *pos) { | |
3106 | return slave; | |
3107 | } | |
3108 | } | |
3109 | ||
3110 | return NULL; | |
3111 | } | |
3112 | ||
3113 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3114 | { | |
3115 | struct bonding *bond = seq->private; | |
3116 | struct slave *slave = v; | |
3117 | ||
3118 | ++*pos; | |
3119 | if (v == SEQ_START_TOKEN) { | |
3120 | return bond->first_slave; | |
3121 | } | |
3122 | ||
3123 | slave = slave->next; | |
3124 | ||
3125 | return (slave == bond->first_slave) ? NULL : slave; | |
3126 | } | |
3127 | ||
3128 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
3129 | { | |
3130 | struct bonding *bond = seq->private; | |
3131 | ||
3132 | read_unlock_bh(&bond->lock); | |
3133 | read_unlock(&dev_base_lock); | |
3134 | } | |
3135 | ||
3136 | static void bond_info_show_master(struct seq_file *seq) | |
3137 | { | |
3138 | struct bonding *bond = seq->private; | |
3139 | struct slave *curr; | |
3140 | ||
3141 | read_lock(&bond->curr_slave_lock); | |
3142 | curr = bond->curr_active_slave; | |
3143 | read_unlock(&bond->curr_slave_lock); | |
3144 | ||
3145 | seq_printf(seq, "Bonding Mode: %s\n", | |
3146 | bond_mode_name(bond->params.mode)); | |
3147 | ||
3148 | if (USES_PRIMARY(bond->params.mode)) { | |
3149 | seq_printf(seq, "Primary Slave: %s\n", | |
3150 | (bond->params.primary[0]) ? | |
3151 | bond->params.primary : "None"); | |
3152 | ||
3153 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3154 | (curr) ? curr->dev->name : "None"); | |
3155 | } | |
3156 | ||
3157 | seq_printf(seq, "MII Status: %s\n", (curr) ? "up" : "down"); | |
3158 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); | |
3159 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3160 | bond->params.updelay * bond->params.miimon); | |
3161 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3162 | bond->params.downdelay * bond->params.miimon); | |
3163 | ||
3164 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3165 | struct ad_info ad_info; | |
3166 | ||
3167 | seq_puts(seq, "\n802.3ad info\n"); | |
3168 | seq_printf(seq, "LACP rate: %s\n", | |
3169 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
3170 | ||
3171 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3172 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3173 | bond->dev->name); | |
3174 | } else { | |
3175 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3176 | ||
3177 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3178 | ad_info.aggregator_id); | |
3179 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3180 | ad_info.ports); | |
3181 | seq_printf(seq, "\tActor Key: %d\n", | |
3182 | ad_info.actor_key); | |
3183 | seq_printf(seq, "\tPartner Key: %d\n", | |
3184 | ad_info.partner_key); | |
3185 | seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3186 | ad_info.partner_system[0], | |
3187 | ad_info.partner_system[1], | |
3188 | ad_info.partner_system[2], | |
3189 | ad_info.partner_system[3], | |
3190 | ad_info.partner_system[4], | |
3191 | ad_info.partner_system[5]); | |
3192 | } | |
3193 | } | |
3194 | } | |
3195 | ||
3196 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3197 | { | |
3198 | struct bonding *bond = seq->private; | |
3199 | ||
3200 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3201 | seq_printf(seq, "MII Status: %s\n", | |
3202 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
3203 | seq_printf(seq, "Link Failure Count: %d\n", | |
3204 | slave->link_failure_count); | |
3205 | ||
3206 | if (app_abi_ver >= 1) { | |
3207 | seq_printf(seq, | |
3208 | "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3209 | slave->perm_hwaddr[0], | |
3210 | slave->perm_hwaddr[1], | |
3211 | slave->perm_hwaddr[2], | |
3212 | slave->perm_hwaddr[3], | |
3213 | slave->perm_hwaddr[4], | |
3214 | slave->perm_hwaddr[5]); | |
3215 | } | |
3216 | ||
3217 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3218 | const struct aggregator *agg | |
3219 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3220 | ||
3221 | if (agg) { | |
3222 | seq_printf(seq, "Aggregator ID: %d\n", | |
3223 | agg->aggregator_identifier); | |
3224 | } else { | |
3225 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3226 | } | |
3227 | } | |
3228 | } | |
3229 | ||
3230 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3231 | { | |
3232 | if (v == SEQ_START_TOKEN) { | |
3233 | seq_printf(seq, "%s\n", version); | |
3234 | bond_info_show_master(seq); | |
3235 | } else { | |
3236 | bond_info_show_slave(seq, v); | |
3237 | } | |
3238 | ||
3239 | return 0; | |
3240 | } | |
3241 | ||
3242 | static struct seq_operations bond_info_seq_ops = { | |
3243 | .start = bond_info_seq_start, | |
3244 | .next = bond_info_seq_next, | |
3245 | .stop = bond_info_seq_stop, | |
3246 | .show = bond_info_seq_show, | |
3247 | }; | |
3248 | ||
3249 | static int bond_info_open(struct inode *inode, struct file *file) | |
3250 | { | |
3251 | struct seq_file *seq; | |
3252 | struct proc_dir_entry *proc; | |
3253 | int res; | |
3254 | ||
3255 | res = seq_open(file, &bond_info_seq_ops); | |
3256 | if (!res) { | |
3257 | /* recover the pointer buried in proc_dir_entry data */ | |
3258 | seq = file->private_data; | |
3259 | proc = PDE(inode); | |
3260 | seq->private = proc->data; | |
3261 | } | |
3262 | ||
3263 | return res; | |
3264 | } | |
3265 | ||
3266 | static struct file_operations bond_info_fops = { | |
3267 | .owner = THIS_MODULE, | |
3268 | .open = bond_info_open, | |
3269 | .read = seq_read, | |
3270 | .llseek = seq_lseek, | |
3271 | .release = seq_release, | |
3272 | }; | |
3273 | ||
3274 | static int bond_create_proc_entry(struct bonding *bond) | |
3275 | { | |
3276 | struct net_device *bond_dev = bond->dev; | |
3277 | ||
3278 | if (bond_proc_dir) { | |
3279 | bond->proc_entry = create_proc_entry(bond_dev->name, | |
3280 | S_IRUGO, | |
3281 | bond_proc_dir); | |
3282 | if (bond->proc_entry == NULL) { | |
3283 | printk(KERN_WARNING DRV_NAME | |
3284 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3285 | DRV_NAME, bond_dev->name); | |
3286 | } else { | |
3287 | bond->proc_entry->data = bond; | |
3288 | bond->proc_entry->proc_fops = &bond_info_fops; | |
3289 | bond->proc_entry->owner = THIS_MODULE; | |
3290 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); | |
3291 | } | |
3292 | } | |
3293 | ||
3294 | return 0; | |
3295 | } | |
3296 | ||
3297 | static void bond_remove_proc_entry(struct bonding *bond) | |
3298 | { | |
3299 | if (bond_proc_dir && bond->proc_entry) { | |
3300 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3301 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3302 | bond->proc_entry = NULL; | |
3303 | } | |
3304 | } | |
3305 | ||
3306 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3307 | * Caller must hold rtnl_lock. | |
3308 | */ | |
3309 | static void bond_create_proc_dir(void) | |
3310 | { | |
3311 | int len = strlen(DRV_NAME); | |
3312 | ||
3313 | for (bond_proc_dir = proc_net->subdir; bond_proc_dir; | |
3314 | bond_proc_dir = bond_proc_dir->next) { | |
3315 | if ((bond_proc_dir->namelen == len) && | |
3316 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3317 | break; | |
3318 | } | |
3319 | } | |
3320 | ||
3321 | if (!bond_proc_dir) { | |
3322 | bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); | |
3323 | if (bond_proc_dir) { | |
3324 | bond_proc_dir->owner = THIS_MODULE; | |
3325 | } else { | |
3326 | printk(KERN_WARNING DRV_NAME | |
3327 | ": Warning: cannot create /proc/net/%s\n", | |
3328 | DRV_NAME); | |
3329 | } | |
3330 | } | |
3331 | } | |
3332 | ||
3333 | /* Destroy the bonding directory under /proc/net, if empty. | |
3334 | * Caller must hold rtnl_lock. | |
3335 | */ | |
3336 | static void bond_destroy_proc_dir(void) | |
3337 | { | |
3338 | struct proc_dir_entry *de; | |
3339 | ||
3340 | if (!bond_proc_dir) { | |
3341 | return; | |
3342 | } | |
3343 | ||
3344 | /* verify that the /proc dir is empty */ | |
3345 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3346 | /* ignore . and .. */ | |
3347 | if (*(de->name) != '.') { | |
3348 | break; | |
3349 | } | |
3350 | } | |
3351 | ||
3352 | if (de) { | |
3353 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3354 | bond_proc_dir->owner = NULL; | |
3355 | } | |
3356 | } else { | |
3357 | remove_proc_entry(DRV_NAME, proc_net); | |
3358 | bond_proc_dir = NULL; | |
3359 | } | |
3360 | } | |
3361 | #endif /* CONFIG_PROC_FS */ | |
3362 | ||
3363 | /*-------------------------- netdev event handling --------------------------*/ | |
3364 | ||
3365 | /* | |
3366 | * Change device name | |
3367 | */ | |
3368 | static int bond_event_changename(struct bonding *bond) | |
3369 | { | |
3370 | #ifdef CONFIG_PROC_FS | |
3371 | bond_remove_proc_entry(bond); | |
3372 | bond_create_proc_entry(bond); | |
3373 | #endif | |
3374 | ||
3375 | return NOTIFY_DONE; | |
3376 | } | |
3377 | ||
3378 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3379 | { | |
3380 | struct bonding *event_bond = bond_dev->priv; | |
3381 | ||
3382 | switch (event) { | |
3383 | case NETDEV_CHANGENAME: | |
3384 | return bond_event_changename(event_bond); | |
3385 | case NETDEV_UNREGISTER: | |
3386 | /* | |
3387 | * TODO: remove a bond from the list? | |
3388 | */ | |
3389 | break; | |
3390 | default: | |
3391 | break; | |
3392 | } | |
3393 | ||
3394 | return NOTIFY_DONE; | |
3395 | } | |
3396 | ||
3397 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3398 | { | |
3399 | struct net_device *bond_dev = slave_dev->master; | |
3400 | ||
3401 | switch (event) { | |
3402 | case NETDEV_UNREGISTER: | |
3403 | if (bond_dev) { | |
3404 | bond_release(bond_dev, slave_dev); | |
3405 | } | |
3406 | break; | |
3407 | case NETDEV_CHANGE: | |
3408 | /* | |
3409 | * TODO: is this what we get if somebody | |
3410 | * sets up a hierarchical bond, then rmmod's | |
3411 | * one of the slave bonding devices? | |
3412 | */ | |
3413 | break; | |
3414 | case NETDEV_DOWN: | |
3415 | /* | |
3416 | * ... Or is it this? | |
3417 | */ | |
3418 | break; | |
3419 | case NETDEV_CHANGEMTU: | |
3420 | /* | |
3421 | * TODO: Should slaves be allowed to | |
3422 | * independently alter their MTU? For | |
3423 | * an active-backup bond, slaves need | |
3424 | * not be the same type of device, so | |
3425 | * MTUs may vary. For other modes, | |
3426 | * slaves arguably should have the | |
3427 | * same MTUs. To do this, we'd need to | |
3428 | * take over the slave's change_mtu | |
3429 | * function for the duration of their | |
3430 | * servitude. | |
3431 | */ | |
3432 | break; | |
3433 | case NETDEV_CHANGENAME: | |
3434 | /* | |
3435 | * TODO: handle changing the primary's name | |
3436 | */ | |
3437 | break; | |
3438 | default: | |
3439 | break; | |
3440 | } | |
3441 | ||
3442 | return NOTIFY_DONE; | |
3443 | } | |
3444 | ||
3445 | /* | |
3446 | * bond_netdev_event: handle netdev notifier chain events. | |
3447 | * | |
3448 | * This function receives events for the netdev chain. The caller (an | |
3449 | * ioctl handler calling notifier_call_chain) holds the necessary | |
3450 | * locks for us to safely manipulate the slave devices (RTNL lock, | |
3451 | * dev_probe_lock). | |
3452 | */ | |
3453 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3454 | { | |
3455 | struct net_device *event_dev = (struct net_device *)ptr; | |
3456 | ||
3457 | dprintk("event_dev: %s, event: %lx\n", | |
3458 | (event_dev ? event_dev->name : "None"), | |
3459 | event); | |
3460 | ||
3461 | if (event_dev->flags & IFF_MASTER) { | |
3462 | dprintk("IFF_MASTER\n"); | |
3463 | return bond_master_netdev_event(event, event_dev); | |
3464 | } | |
3465 | ||
3466 | if (event_dev->flags & IFF_SLAVE) { | |
3467 | dprintk("IFF_SLAVE\n"); | |
3468 | return bond_slave_netdev_event(event, event_dev); | |
3469 | } | |
3470 | ||
3471 | return NOTIFY_DONE; | |
3472 | } | |
3473 | ||
3474 | static struct notifier_block bond_netdev_notifier = { | |
3475 | .notifier_call = bond_netdev_event, | |
3476 | }; | |
3477 | ||
3478 | /*-------------------------- Packet type handling ---------------------------*/ | |
3479 | ||
3480 | /* register to receive lacpdus on a bond */ | |
3481 | static void bond_register_lacpdu(struct bonding *bond) | |
3482 | { | |
3483 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3484 | ||
3485 | /* initialize packet type */ | |
3486 | pk_type->type = PKT_TYPE_LACPDU; | |
3487 | pk_type->dev = bond->dev; | |
3488 | pk_type->func = bond_3ad_lacpdu_recv; | |
3489 | ||
3490 | dev_add_pack(pk_type); | |
3491 | } | |
3492 | ||
3493 | /* unregister to receive lacpdus on a bond */ | |
3494 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3495 | { | |
3496 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3497 | } | |
3498 | ||
3499 | /*-------------------------- Device entry points ----------------------------*/ | |
3500 | ||
3501 | static int bond_open(struct net_device *bond_dev) | |
3502 | { | |
3503 | struct bonding *bond = bond_dev->priv; | |
3504 | struct timer_list *mii_timer = &bond->mii_timer; | |
3505 | struct timer_list *arp_timer = &bond->arp_timer; | |
3506 | ||
3507 | bond->kill_timers = 0; | |
3508 | ||
3509 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3510 | (bond->params.mode == BOND_MODE_ALB)) { | |
3511 | struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); | |
3512 | ||
3513 | /* bond_alb_initialize must be called before the timer | |
3514 | * is started. | |
3515 | */ | |
3516 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3517 | /* something went wrong - fail the open operation */ | |
3518 | return -1; | |
3519 | } | |
3520 | ||
3521 | init_timer(alb_timer); | |
3522 | alb_timer->expires = jiffies + 1; | |
3523 | alb_timer->data = (unsigned long)bond; | |
3524 | alb_timer->function = (void *)&bond_alb_monitor; | |
3525 | add_timer(alb_timer); | |
3526 | } | |
3527 | ||
3528 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3529 | init_timer(mii_timer); | |
3530 | mii_timer->expires = jiffies + 1; | |
3531 | mii_timer->data = (unsigned long)bond_dev; | |
3532 | mii_timer->function = (void *)&bond_mii_monitor; | |
3533 | add_timer(mii_timer); | |
3534 | } | |
3535 | ||
3536 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3537 | init_timer(arp_timer); | |
3538 | arp_timer->expires = jiffies + 1; | |
3539 | arp_timer->data = (unsigned long)bond_dev; | |
3540 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3541 | arp_timer->function = (void *)&bond_activebackup_arp_mon; | |
3542 | } else { | |
3543 | arp_timer->function = (void *)&bond_loadbalance_arp_mon; | |
3544 | } | |
3545 | add_timer(arp_timer); | |
3546 | } | |
3547 | ||
3548 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3549 | struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); | |
3550 | init_timer(ad_timer); | |
3551 | ad_timer->expires = jiffies + 1; | |
3552 | ad_timer->data = (unsigned long)bond; | |
3553 | ad_timer->function = (void *)&bond_3ad_state_machine_handler; | |
3554 | add_timer(ad_timer); | |
3555 | ||
3556 | /* register to receive LACPDUs */ | |
3557 | bond_register_lacpdu(bond); | |
3558 | } | |
3559 | ||
3560 | return 0; | |
3561 | } | |
3562 | ||
3563 | static int bond_close(struct net_device *bond_dev) | |
3564 | { | |
3565 | struct bonding *bond = bond_dev->priv; | |
3566 | ||
3567 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3568 | /* Unregister the receive of LACPDUs */ | |
3569 | bond_unregister_lacpdu(bond); | |
3570 | } | |
3571 | ||
3572 | write_lock_bh(&bond->lock); | |
3573 | ||
3574 | bond_mc_list_destroy(bond); | |
3575 | ||
3576 | /* signal timers not to re-arm */ | |
3577 | bond->kill_timers = 1; | |
3578 | ||
3579 | write_unlock_bh(&bond->lock); | |
3580 | ||
3581 | /* del_timer_sync must run without holding the bond->lock | |
3582 | * because a running timer might be trying to hold it too | |
3583 | */ | |
3584 | ||
3585 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3586 | del_timer_sync(&bond->mii_timer); | |
3587 | } | |
3588 | ||
3589 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3590 | del_timer_sync(&bond->arp_timer); | |
3591 | } | |
3592 | ||
3593 | switch (bond->params.mode) { | |
3594 | case BOND_MODE_8023AD: | |
3595 | del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); | |
3596 | break; | |
3597 | case BOND_MODE_TLB: | |
3598 | case BOND_MODE_ALB: | |
3599 | del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); | |
3600 | break; | |
3601 | default: | |
3602 | break; | |
3603 | } | |
3604 | ||
3605 | /* Release the bonded slaves */ | |
3606 | bond_release_all(bond_dev); | |
3607 | ||
3608 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3609 | (bond->params.mode == BOND_MODE_ALB)) { | |
3610 | /* Must be called only after all | |
3611 | * slaves have been released | |
3612 | */ | |
3613 | bond_alb_deinitialize(bond); | |
3614 | } | |
3615 | ||
3616 | return 0; | |
3617 | } | |
3618 | ||
3619 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3620 | { | |
3621 | struct bonding *bond = bond_dev->priv; | |
3622 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
3623 | struct slave *slave; | |
3624 | int i; | |
3625 | ||
3626 | memset(stats, 0, sizeof(struct net_device_stats)); | |
3627 | ||
3628 | read_lock_bh(&bond->lock); | |
3629 | ||
3630 | bond_for_each_slave(bond, slave, i) { | |
3631 | sstats = slave->dev->get_stats(slave->dev); | |
3632 | ||
3633 | stats->rx_packets += sstats->rx_packets; | |
3634 | stats->rx_bytes += sstats->rx_bytes; | |
3635 | stats->rx_errors += sstats->rx_errors; | |
3636 | stats->rx_dropped += sstats->rx_dropped; | |
3637 | ||
3638 | stats->tx_packets += sstats->tx_packets; | |
3639 | stats->tx_bytes += sstats->tx_bytes; | |
3640 | stats->tx_errors += sstats->tx_errors; | |
3641 | stats->tx_dropped += sstats->tx_dropped; | |
3642 | ||
3643 | stats->multicast += sstats->multicast; | |
3644 | stats->collisions += sstats->collisions; | |
3645 | ||
3646 | stats->rx_length_errors += sstats->rx_length_errors; | |
3647 | stats->rx_over_errors += sstats->rx_over_errors; | |
3648 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3649 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3650 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3651 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3652 | ||
3653 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3654 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3655 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3656 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3657 | stats->tx_window_errors += sstats->tx_window_errors; | |
3658 | } | |
3659 | ||
3660 | read_unlock_bh(&bond->lock); | |
3661 | ||
3662 | return stats; | |
3663 | } | |
3664 | ||
3665 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3666 | { | |
3667 | struct net_device *slave_dev = NULL; | |
3668 | struct ifbond k_binfo; | |
3669 | struct ifbond __user *u_binfo = NULL; | |
3670 | struct ifslave k_sinfo; | |
3671 | struct ifslave __user *u_sinfo = NULL; | |
3672 | struct mii_ioctl_data *mii = NULL; | |
3673 | int prev_abi_ver = orig_app_abi_ver; | |
3674 | int res = 0; | |
3675 | ||
3676 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3677 | bond_dev->name, cmd); | |
3678 | ||
3679 | switch (cmd) { | |
3680 | case SIOCETHTOOL: | |
3681 | return bond_ethtool_ioctl(bond_dev, ifr); | |
3682 | case SIOCGMIIPHY: | |
3683 | mii = if_mii(ifr); | |
3684 | if (!mii) { | |
3685 | return -EINVAL; | |
3686 | } | |
3687 | mii->phy_id = 0; | |
3688 | /* Fall Through */ | |
3689 | case SIOCGMIIREG: | |
3690 | /* | |
3691 | * We do this again just in case we were called by SIOCGMIIREG | |
3692 | * instead of SIOCGMIIPHY. | |
3693 | */ | |
3694 | mii = if_mii(ifr); | |
3695 | if (!mii) { | |
3696 | return -EINVAL; | |
3697 | } | |
3698 | ||
3699 | if (mii->reg_num == 1) { | |
3700 | struct bonding *bond = bond_dev->priv; | |
3701 | mii->val_out = 0; | |
3702 | read_lock_bh(&bond->lock); | |
3703 | read_lock(&bond->curr_slave_lock); | |
3704 | if (bond->curr_active_slave) { | |
3705 | mii->val_out = BMSR_LSTATUS; | |
3706 | } | |
3707 | read_unlock(&bond->curr_slave_lock); | |
3708 | read_unlock_bh(&bond->lock); | |
3709 | } | |
3710 | ||
3711 | return 0; | |
3712 | case BOND_INFO_QUERY_OLD: | |
3713 | case SIOCBONDINFOQUERY: | |
3714 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3715 | ||
3716 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3717 | return -EFAULT; | |
3718 | } | |
3719 | ||
3720 | res = bond_info_query(bond_dev, &k_binfo); | |
3721 | if (res == 0) { | |
3722 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3723 | return -EFAULT; | |
3724 | } | |
3725 | } | |
3726 | ||
3727 | return res; | |
3728 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3729 | case SIOCBONDSLAVEINFOQUERY: | |
3730 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3731 | ||
3732 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3733 | return -EFAULT; | |
3734 | } | |
3735 | ||
3736 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3737 | if (res == 0) { | |
3738 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
3739 | return -EFAULT; | |
3740 | } | |
3741 | } | |
3742 | ||
3743 | return res; | |
3744 | default: | |
3745 | /* Go on */ | |
3746 | break; | |
3747 | } | |
3748 | ||
3749 | if (!capable(CAP_NET_ADMIN)) { | |
3750 | return -EPERM; | |
3751 | } | |
3752 | ||
3753 | if (orig_app_abi_ver == -1) { | |
3754 | /* no orig_app_abi_ver was provided yet, so we'll use the | |
3755 | * current one from now on, even if it's 0 | |
3756 | */ | |
3757 | orig_app_abi_ver = app_abi_ver; | |
3758 | ||
3759 | } else if (orig_app_abi_ver != app_abi_ver) { | |
3760 | printk(KERN_ERR DRV_NAME | |
3761 | ": Error: already using ifenslave ABI version %d; to " | |
3762 | "upgrade ifenslave to version %d, you must first " | |
3763 | "reload bonding.\n", | |
3764 | orig_app_abi_ver, app_abi_ver); | |
3765 | return -EINVAL; | |
3766 | } | |
3767 | ||
3768 | slave_dev = dev_get_by_name(ifr->ifr_slave); | |
3769 | ||
3770 | dprintk("slave_dev=%p: \n", slave_dev); | |
3771 | ||
3772 | if (!slave_dev) { | |
3773 | res = -ENODEV; | |
3774 | } else { | |
3775 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
3776 | switch (cmd) { | |
3777 | case BOND_ENSLAVE_OLD: | |
3778 | case SIOCBONDENSLAVE: | |
3779 | res = bond_enslave(bond_dev, slave_dev); | |
3780 | break; | |
3781 | case BOND_RELEASE_OLD: | |
3782 | case SIOCBONDRELEASE: | |
3783 | res = bond_release(bond_dev, slave_dev); | |
3784 | break; | |
3785 | case BOND_SETHWADDR_OLD: | |
3786 | case SIOCBONDSETHWADDR: | |
3787 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3788 | break; | |
3789 | case BOND_CHANGE_ACTIVE_OLD: | |
3790 | case SIOCBONDCHANGEACTIVE: | |
3791 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3792 | break; | |
3793 | default: | |
3794 | res = -EOPNOTSUPP; | |
3795 | } | |
3796 | ||
3797 | dev_put(slave_dev); | |
3798 | } | |
3799 | ||
3800 | if (res < 0) { | |
3801 | /* The ioctl failed, so there's no point in changing the | |
3802 | * orig_app_abi_ver. We'll restore it's value just in case | |
3803 | * we've changed it earlier in this function. | |
3804 | */ | |
3805 | orig_app_abi_ver = prev_abi_ver; | |
3806 | } | |
3807 | ||
3808 | return res; | |
3809 | } | |
3810 | ||
3811 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
3812 | { | |
3813 | struct bonding *bond = bond_dev->priv; | |
3814 | struct dev_mc_list *dmi; | |
3815 | ||
3816 | write_lock_bh(&bond->lock); | |
3817 | ||
3818 | /* | |
3819 | * Do promisc before checking multicast_mode | |
3820 | */ | |
3821 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
3822 | bond_set_promiscuity(bond, 1); | |
3823 | } | |
3824 | ||
3825 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
3826 | bond_set_promiscuity(bond, -1); | |
3827 | } | |
3828 | ||
3829 | /* set allmulti flag to slaves */ | |
3830 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
3831 | bond_set_allmulti(bond, 1); | |
3832 | } | |
3833 | ||
3834 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
3835 | bond_set_allmulti(bond, -1); | |
3836 | } | |
3837 | ||
3838 | bond->flags = bond_dev->flags; | |
3839 | ||
3840 | /* looking for addresses to add to slaves' mc list */ | |
3841 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
3842 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
3843 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3844 | } | |
3845 | } | |
3846 | ||
3847 | /* looking for addresses to delete from slaves' list */ | |
3848 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
3849 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
3850 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3851 | } | |
3852 | } | |
3853 | ||
3854 | /* save master's multicast list */ | |
3855 | bond_mc_list_destroy(bond); | |
3856 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
3857 | ||
3858 | write_unlock_bh(&bond->lock); | |
3859 | } | |
3860 | ||
3861 | /* | |
3862 | * Change the MTU of all of a master's slaves to match the master | |
3863 | */ | |
3864 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3865 | { | |
3866 | struct bonding *bond = bond_dev->priv; | |
3867 | struct slave *slave, *stop_at; | |
3868 | int res = 0; | |
3869 | int i; | |
3870 | ||
3871 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
3872 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
3873 | ||
3874 | /* Can't hold bond->lock with bh disabled here since | |
3875 | * some base drivers panic. On the other hand we can't | |
3876 | * hold bond->lock without bh disabled because we'll | |
3877 | * deadlock. The only solution is to rely on the fact | |
3878 | * that we're under rtnl_lock here, and the slaves | |
3879 | * list won't change. This doesn't solve the problem | |
3880 | * of setting the slave's MTU while it is | |
3881 | * transmitting, but the assumption is that the base | |
3882 | * driver can handle that. | |
3883 | * | |
3884 | * TODO: figure out a way to safely iterate the slaves | |
3885 | * list, but without holding a lock around the actual | |
3886 | * call to the base driver. | |
3887 | */ | |
3888 | ||
3889 | bond_for_each_slave(bond, slave, i) { | |
3890 | dprintk("s %p s->p %p c_m %p\n", slave, | |
3891 | slave->prev, slave->dev->change_mtu); | |
3892 | res = dev_set_mtu(slave->dev, new_mtu); | |
3893 | ||
3894 | if (res) { | |
3895 | /* If we failed to set the slave's mtu to the new value | |
3896 | * we must abort the operation even in ACTIVE_BACKUP | |
3897 | * mode, because if we allow the backup slaves to have | |
3898 | * different mtu values than the active slave we'll | |
3899 | * need to change their mtu when doing a failover. That | |
3900 | * means changing their mtu from timer context, which | |
3901 | * is probably not a good idea. | |
3902 | */ | |
3903 | dprintk("err %d %s\n", res, slave->dev->name); | |
3904 | goto unwind; | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | bond_dev->mtu = new_mtu; | |
3909 | ||
3910 | return 0; | |
3911 | ||
3912 | unwind: | |
3913 | /* unwind from head to the slave that failed */ | |
3914 | stop_at = slave; | |
3915 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3916 | int tmp_res; | |
3917 | ||
3918 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3919 | if (tmp_res) { | |
3920 | dprintk("unwind err %d dev %s\n", tmp_res, | |
3921 | slave->dev->name); | |
3922 | } | |
3923 | } | |
3924 | ||
3925 | return res; | |
3926 | } | |
3927 | ||
3928 | /* | |
3929 | * Change HW address | |
3930 | * | |
3931 | * Note that many devices must be down to change the HW address, and | |
3932 | * downing the master releases all slaves. We can make bonds full of | |
3933 | * bonding devices to test this, however. | |
3934 | */ | |
3935 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3936 | { | |
3937 | struct bonding *bond = bond_dev->priv; | |
3938 | struct sockaddr *sa = addr, tmp_sa; | |
3939 | struct slave *slave, *stop_at; | |
3940 | int res = 0; | |
3941 | int i; | |
3942 | ||
3943 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
3944 | ||
3945 | if (!is_valid_ether_addr(sa->sa_data)) { | |
3946 | return -EADDRNOTAVAIL; | |
3947 | } | |
3948 | ||
3949 | /* Can't hold bond->lock with bh disabled here since | |
3950 | * some base drivers panic. On the other hand we can't | |
3951 | * hold bond->lock without bh disabled because we'll | |
3952 | * deadlock. The only solution is to rely on the fact | |
3953 | * that we're under rtnl_lock here, and the slaves | |
3954 | * list won't change. This doesn't solve the problem | |
3955 | * of setting the slave's hw address while it is | |
3956 | * transmitting, but the assumption is that the base | |
3957 | * driver can handle that. | |
3958 | * | |
3959 | * TODO: figure out a way to safely iterate the slaves | |
3960 | * list, but without holding a lock around the actual | |
3961 | * call to the base driver. | |
3962 | */ | |
3963 | ||
3964 | bond_for_each_slave(bond, slave, i) { | |
3965 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
3966 | ||
3967 | if (slave->dev->set_mac_address == NULL) { | |
3968 | res = -EOPNOTSUPP; | |
3969 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
3970 | goto unwind; | |
3971 | } | |
3972 | ||
3973 | res = dev_set_mac_address(slave->dev, addr); | |
3974 | if (res) { | |
3975 | /* TODO: consider downing the slave | |
3976 | * and retry ? | |
3977 | * User should expect communications | |
3978 | * breakage anyway until ARP finish | |
3979 | * updating, so... | |
3980 | */ | |
3981 | dprintk("err %d %s\n", res, slave->dev->name); | |
3982 | goto unwind; | |
3983 | } | |
3984 | } | |
3985 | ||
3986 | /* success */ | |
3987 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3988 | return 0; | |
3989 | ||
3990 | unwind: | |
3991 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3992 | tmp_sa.sa_family = bond_dev->type; | |
3993 | ||
3994 | /* unwind from head to the slave that failed */ | |
3995 | stop_at = slave; | |
3996 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3997 | int tmp_res; | |
3998 | ||
3999 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4000 | if (tmp_res) { | |
4001 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4002 | slave->dev->name); | |
4003 | } | |
4004 | } | |
4005 | ||
4006 | return res; | |
4007 | } | |
4008 | ||
4009 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4010 | { | |
4011 | struct bonding *bond = bond_dev->priv; | |
4012 | struct slave *slave, *start_at; | |
4013 | int i; | |
4014 | int res = 1; | |
4015 | ||
4016 | read_lock(&bond->lock); | |
4017 | ||
4018 | if (!BOND_IS_OK(bond)) { | |
4019 | goto out; | |
4020 | } | |
4021 | ||
4022 | read_lock(&bond->curr_slave_lock); | |
4023 | slave = start_at = bond->curr_active_slave; | |
4024 | read_unlock(&bond->curr_slave_lock); | |
4025 | ||
4026 | if (!slave) { | |
4027 | goto out; | |
4028 | } | |
4029 | ||
4030 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4031 | if (IS_UP(slave->dev) && | |
4032 | (slave->link == BOND_LINK_UP) && | |
4033 | (slave->state == BOND_STATE_ACTIVE)) { | |
4034 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4035 | ||
4036 | write_lock(&bond->curr_slave_lock); | |
4037 | bond->curr_active_slave = slave->next; | |
4038 | write_unlock(&bond->curr_slave_lock); | |
4039 | ||
4040 | break; | |
4041 | } | |
4042 | } | |
4043 | ||
4044 | ||
4045 | out: | |
4046 | if (res) { | |
4047 | /* no suitable interface, frame not sent */ | |
4048 | dev_kfree_skb(skb); | |
4049 | } | |
4050 | read_unlock(&bond->lock); | |
4051 | return 0; | |
4052 | } | |
4053 | ||
4054 | /* | |
4055 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4056 | * the bond has a usable interface. | |
4057 | */ | |
4058 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4059 | { | |
4060 | struct bonding *bond = bond_dev->priv; | |
4061 | int res = 1; | |
4062 | ||
4063 | /* if we are sending arp packets, try to at least | |
4064 | identify our own ip address */ | |
4065 | if (bond->params.arp_interval && !my_ip && | |
4066 | (skb->protocol == __constant_htons(ETH_P_ARP))) { | |
4067 | char *the_ip = (char *)skb->data + | |
4068 | sizeof(struct ethhdr) + | |
4069 | sizeof(struct arphdr) + | |
4070 | ETH_ALEN; | |
4071 | memcpy(&my_ip, the_ip, 4); | |
4072 | } | |
4073 | ||
4074 | read_lock(&bond->lock); | |
4075 | read_lock(&bond->curr_slave_lock); | |
4076 | ||
4077 | if (!BOND_IS_OK(bond)) { | |
4078 | goto out; | |
4079 | } | |
4080 | ||
4081 | if (bond->curr_active_slave) { /* one usable interface */ | |
4082 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); | |
4083 | } | |
4084 | ||
4085 | out: | |
4086 | if (res) { | |
4087 | /* no suitable interface, frame not sent */ | |
4088 | dev_kfree_skb(skb); | |
4089 | } | |
4090 | read_unlock(&bond->curr_slave_lock); | |
4091 | read_unlock(&bond->lock); | |
4092 | return 0; | |
4093 | } | |
4094 | ||
4095 | /* | |
4096 | * in XOR mode, we determine the output device by performing xor on | |
4097 | * the source and destination hw adresses. If this device is not | |
4098 | * enabled, find the next slave following this xor slave. | |
4099 | */ | |
4100 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4101 | { | |
4102 | struct bonding *bond = bond_dev->priv; | |
4103 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
4104 | struct slave *slave, *start_at; | |
4105 | int slave_no; | |
4106 | int i; | |
4107 | int res = 1; | |
4108 | ||
4109 | read_lock(&bond->lock); | |
4110 | ||
4111 | if (!BOND_IS_OK(bond)) { | |
4112 | goto out; | |
4113 | } | |
4114 | ||
4115 | slave_no = (data->h_dest[5]^bond_dev->dev_addr[5]) % bond->slave_cnt; | |
4116 | ||
4117 | bond_for_each_slave(bond, slave, i) { | |
4118 | slave_no--; | |
4119 | if (slave_no < 0) { | |
4120 | break; | |
4121 | } | |
4122 | } | |
4123 | ||
4124 | start_at = slave; | |
4125 | ||
4126 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4127 | if (IS_UP(slave->dev) && | |
4128 | (slave->link == BOND_LINK_UP) && | |
4129 | (slave->state == BOND_STATE_ACTIVE)) { | |
4130 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4131 | break; | |
4132 | } | |
4133 | } | |
4134 | ||
4135 | out: | |
4136 | if (res) { | |
4137 | /* no suitable interface, frame not sent */ | |
4138 | dev_kfree_skb(skb); | |
4139 | } | |
4140 | read_unlock(&bond->lock); | |
4141 | return 0; | |
4142 | } | |
4143 | ||
4144 | /* | |
4145 | * in broadcast mode, we send everything to all usable interfaces. | |
4146 | */ | |
4147 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4148 | { | |
4149 | struct bonding *bond = bond_dev->priv; | |
4150 | struct slave *slave, *start_at; | |
4151 | struct net_device *tx_dev = NULL; | |
4152 | int i; | |
4153 | int res = 1; | |
4154 | ||
4155 | read_lock(&bond->lock); | |
4156 | ||
4157 | if (!BOND_IS_OK(bond)) { | |
4158 | goto out; | |
4159 | } | |
4160 | ||
4161 | read_lock(&bond->curr_slave_lock); | |
4162 | start_at = bond->curr_active_slave; | |
4163 | read_unlock(&bond->curr_slave_lock); | |
4164 | ||
4165 | if (!start_at) { | |
4166 | goto out; | |
4167 | } | |
4168 | ||
4169 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4170 | if (IS_UP(slave->dev) && | |
4171 | (slave->link == BOND_LINK_UP) && | |
4172 | (slave->state == BOND_STATE_ACTIVE)) { | |
4173 | if (tx_dev) { | |
4174 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4175 | if (!skb2) { | |
4176 | printk(KERN_ERR DRV_NAME | |
4177 | ": Error: bond_xmit_broadcast(): " | |
4178 | "skb_clone() failed\n"); | |
4179 | continue; | |
4180 | } | |
4181 | ||
4182 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4183 | if (res) { | |
4184 | dev_kfree_skb(skb2); | |
4185 | continue; | |
4186 | } | |
4187 | } | |
4188 | tx_dev = slave->dev; | |
4189 | } | |
4190 | } | |
4191 | ||
4192 | if (tx_dev) { | |
4193 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4194 | } | |
4195 | ||
4196 | out: | |
4197 | if (res) { | |
4198 | /* no suitable interface, frame not sent */ | |
4199 | dev_kfree_skb(skb); | |
4200 | } | |
4201 | /* frame sent to all suitable interfaces */ | |
4202 | read_unlock(&bond->lock); | |
4203 | return 0; | |
4204 | } | |
4205 | ||
4206 | /*------------------------- Device initialization ---------------------------*/ | |
4207 | ||
4208 | /* | |
4209 | * set bond mode specific net device operations | |
4210 | */ | |
4211 | static inline void bond_set_mode_ops(struct net_device *bond_dev, int mode) | |
4212 | { | |
4213 | switch (mode) { | |
4214 | case BOND_MODE_ROUNDROBIN: | |
4215 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4216 | break; | |
4217 | case BOND_MODE_ACTIVEBACKUP: | |
4218 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4219 | break; | |
4220 | case BOND_MODE_XOR: | |
4221 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
4222 | break; | |
4223 | case BOND_MODE_BROADCAST: | |
4224 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4225 | break; | |
4226 | case BOND_MODE_8023AD: | |
4227 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; | |
4228 | break; | |
4229 | case BOND_MODE_TLB: | |
4230 | case BOND_MODE_ALB: | |
4231 | bond_dev->hard_start_xmit = bond_alb_xmit; | |
4232 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4233 | break; | |
4234 | default: | |
4235 | /* Should never happen, mode already checked */ | |
4236 | printk(KERN_ERR DRV_NAME | |
4237 | ": Error: Unknown bonding mode %d\n", | |
4238 | mode); | |
4239 | break; | |
4240 | } | |
4241 | } | |
4242 | ||
4243 | /* | |
4244 | * Does not allocate but creates a /proc entry. | |
4245 | * Allowed to fail. | |
4246 | */ | |
4247 | static int __init bond_init(struct net_device *bond_dev, struct bond_params *params) | |
4248 | { | |
4249 | struct bonding *bond = bond_dev->priv; | |
4250 | ||
4251 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4252 | ||
4253 | /* initialize rwlocks */ | |
4254 | rwlock_init(&bond->lock); | |
4255 | rwlock_init(&bond->curr_slave_lock); | |
4256 | ||
4257 | bond->params = *params; /* copy params struct */ | |
4258 | ||
4259 | /* Initialize pointers */ | |
4260 | bond->first_slave = NULL; | |
4261 | bond->curr_active_slave = NULL; | |
4262 | bond->current_arp_slave = NULL; | |
4263 | bond->primary_slave = NULL; | |
4264 | bond->dev = bond_dev; | |
4265 | INIT_LIST_HEAD(&bond->vlan_list); | |
4266 | ||
4267 | /* Initialize the device entry points */ | |
4268 | bond_dev->open = bond_open; | |
4269 | bond_dev->stop = bond_close; | |
4270 | bond_dev->get_stats = bond_get_stats; | |
4271 | bond_dev->do_ioctl = bond_do_ioctl; | |
4272 | bond_dev->set_multicast_list = bond_set_multicast_list; | |
4273 | bond_dev->change_mtu = bond_change_mtu; | |
4274 | bond_dev->set_mac_address = bond_set_mac_address; | |
4275 | ||
4276 | bond_set_mode_ops(bond_dev, bond->params.mode); | |
4277 | ||
4278 | bond_dev->destructor = free_netdev; | |
4279 | ||
4280 | /* Initialize the device options */ | |
4281 | bond_dev->tx_queue_len = 0; | |
4282 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
4283 | ||
4284 | /* At first, we block adding VLANs. That's the only way to | |
4285 | * prevent problems that occur when adding VLANs over an | |
4286 | * empty bond. The block will be removed once non-challenged | |
4287 | * slaves are enslaved. | |
4288 | */ | |
4289 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4290 | ||
4291 | /* don't acquire bond device's xmit_lock when | |
4292 | * transmitting */ | |
4293 | bond_dev->features |= NETIF_F_LLTX; | |
4294 | ||
4295 | /* By default, we declare the bond to be fully | |
4296 | * VLAN hardware accelerated capable. Special | |
4297 | * care is taken in the various xmit functions | |
4298 | * when there are slaves that are not hw accel | |
4299 | * capable | |
4300 | */ | |
4301 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4302 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4303 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4304 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4305 | NETIF_F_HW_VLAN_RX | | |
4306 | NETIF_F_HW_VLAN_FILTER); | |
4307 | ||
4308 | #ifdef CONFIG_PROC_FS | |
4309 | bond_create_proc_entry(bond); | |
4310 | #endif | |
4311 | ||
4312 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
4313 | ||
4314 | return 0; | |
4315 | } | |
4316 | ||
4317 | /* De-initialize device specific data. | |
4318 | * Caller must hold rtnl_lock. | |
4319 | */ | |
4320 | static inline void bond_deinit(struct net_device *bond_dev) | |
4321 | { | |
4322 | struct bonding *bond = bond_dev->priv; | |
4323 | ||
4324 | list_del(&bond->bond_list); | |
4325 | ||
4326 | #ifdef CONFIG_PROC_FS | |
4327 | bond_remove_proc_entry(bond); | |
4328 | #endif | |
4329 | } | |
4330 | ||
4331 | /* Unregister and free all bond devices. | |
4332 | * Caller must hold rtnl_lock. | |
4333 | */ | |
4334 | static void bond_free_all(void) | |
4335 | { | |
4336 | struct bonding *bond, *nxt; | |
4337 | ||
4338 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4339 | struct net_device *bond_dev = bond->dev; | |
4340 | ||
4341 | unregister_netdevice(bond_dev); | |
4342 | bond_deinit(bond_dev); | |
4343 | } | |
4344 | ||
4345 | #ifdef CONFIG_PROC_FS | |
4346 | bond_destroy_proc_dir(); | |
4347 | #endif | |
4348 | } | |
4349 | ||
4350 | /*------------------------- Module initialization ---------------------------*/ | |
4351 | ||
4352 | /* | |
4353 | * Convert string input module parms. Accept either the | |
4354 | * number of the mode or its string name. | |
4355 | */ | |
4356 | static inline int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) | |
4357 | { | |
4358 | int i; | |
4359 | ||
4360 | for (i = 0; tbl[i].modename; i++) { | |
4361 | if ((isdigit(*mode_arg) && | |
4362 | tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || | |
4363 | (strncmp(mode_arg, tbl[i].modename, | |
4364 | strlen(tbl[i].modename)) == 0)) { | |
4365 | return tbl[i].mode; | |
4366 | } | |
4367 | } | |
4368 | ||
4369 | return -1; | |
4370 | } | |
4371 | ||
4372 | static int bond_check_params(struct bond_params *params) | |
4373 | { | |
4374 | /* | |
4375 | * Convert string parameters. | |
4376 | */ | |
4377 | if (mode) { | |
4378 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4379 | if (bond_mode == -1) { | |
4380 | printk(KERN_ERR DRV_NAME | |
4381 | ": Error: Invalid bonding mode \"%s\"\n", | |
4382 | mode == NULL ? "NULL" : mode); | |
4383 | return -EINVAL; | |
4384 | } | |
4385 | } | |
4386 | ||
4387 | if (lacp_rate) { | |
4388 | if (bond_mode != BOND_MODE_8023AD) { | |
4389 | printk(KERN_INFO DRV_NAME | |
4390 | ": lacp_rate param is irrelevant in mode %s\n", | |
4391 | bond_mode_name(bond_mode)); | |
4392 | } else { | |
4393 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4394 | if (lacp_fast == -1) { | |
4395 | printk(KERN_ERR DRV_NAME | |
4396 | ": Error: Invalid lacp rate \"%s\"\n", | |
4397 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4398 | return -EINVAL; | |
4399 | } | |
4400 | } | |
4401 | } | |
4402 | ||
4403 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4404 | printk(KERN_WARNING DRV_NAME | |
4405 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4406 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)", | |
4407 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
4408 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4409 | } | |
4410 | ||
4411 | if (miimon < 0) { | |
4412 | printk(KERN_WARNING DRV_NAME | |
4413 | ": Warning: miimon module parameter (%d), " | |
4414 | "not in range 0-%d, so it was reset to %d\n", | |
4415 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4416 | miimon = BOND_LINK_MON_INTERV; | |
4417 | } | |
4418 | ||
4419 | if (updelay < 0) { | |
4420 | printk(KERN_WARNING DRV_NAME | |
4421 | ": Warning: updelay module parameter (%d), " | |
4422 | "not in range 0-%d, so it was reset to 0\n", | |
4423 | updelay, INT_MAX); | |
4424 | updelay = 0; | |
4425 | } | |
4426 | ||
4427 | if (downdelay < 0) { | |
4428 | printk(KERN_WARNING DRV_NAME | |
4429 | ": Warning: downdelay module parameter (%d), " | |
4430 | "not in range 0-%d, so it was reset to 0\n", | |
4431 | downdelay, INT_MAX); | |
4432 | downdelay = 0; | |
4433 | } | |
4434 | ||
4435 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4436 | printk(KERN_WARNING DRV_NAME | |
4437 | ": Warning: use_carrier module parameter (%d), " | |
4438 | "not of valid value (0/1), so it was set to 1\n", | |
4439 | use_carrier); | |
4440 | use_carrier = 1; | |
4441 | } | |
4442 | ||
4443 | /* reset values for 802.3ad */ | |
4444 | if (bond_mode == BOND_MODE_8023AD) { | |
4445 | if (!miimon) { | |
4446 | printk(KERN_WARNING DRV_NAME | |
4447 | ": Warning: miimon must be specified, " | |
4448 | "otherwise bonding will not detect link " | |
4449 | "failure, speed and duplex which are " | |
4450 | "essential for 802.3ad operation\n"); | |
4451 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4452 | miimon = 100; | |
4453 | } | |
4454 | } | |
4455 | ||
4456 | /* reset values for TLB/ALB */ | |
4457 | if ((bond_mode == BOND_MODE_TLB) || | |
4458 | (bond_mode == BOND_MODE_ALB)) { | |
4459 | if (!miimon) { | |
4460 | printk(KERN_WARNING DRV_NAME | |
4461 | ": Warning: miimon must be specified, " | |
4462 | "otherwise bonding will not detect link " | |
4463 | "failure and link speed which are essential " | |
4464 | "for TLB/ALB load balancing\n"); | |
4465 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4466 | miimon = 100; | |
4467 | } | |
4468 | } | |
4469 | ||
4470 | if (bond_mode == BOND_MODE_ALB) { | |
4471 | printk(KERN_NOTICE DRV_NAME | |
4472 | ": In ALB mode you might experience client " | |
4473 | "disconnections upon reconnection of a link if the " | |
4474 | "bonding module updelay parameter (%d msec) is " | |
4475 | "incompatible with the forwarding delay time of the " | |
4476 | "switch\n", | |
4477 | updelay); | |
4478 | } | |
4479 | ||
4480 | if (!miimon) { | |
4481 | if (updelay || downdelay) { | |
4482 | /* just warn the user the up/down delay will have | |
4483 | * no effect since miimon is zero... | |
4484 | */ | |
4485 | printk(KERN_WARNING DRV_NAME | |
4486 | ": Warning: miimon module parameter not set " | |
4487 | "and updelay (%d) or downdelay (%d) module " | |
4488 | "parameter is set; updelay and downdelay have " | |
4489 | "no effect unless miimon is set\n", | |
4490 | updelay, downdelay); | |
4491 | } | |
4492 | } else { | |
4493 | /* don't allow arp monitoring */ | |
4494 | if (arp_interval) { | |
4495 | printk(KERN_WARNING DRV_NAME | |
4496 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4497 | "can't be used simultaneously, disabling ARP " | |
4498 | "monitoring\n", | |
4499 | miimon, arp_interval); | |
4500 | arp_interval = 0; | |
4501 | } | |
4502 | ||
4503 | if ((updelay % miimon) != 0) { | |
4504 | printk(KERN_WARNING DRV_NAME | |
4505 | ": Warning: updelay (%d) is not a multiple " | |
4506 | "of miimon (%d), updelay rounded to %d ms\n", | |
4507 | updelay, miimon, (updelay / miimon) * miimon); | |
4508 | } | |
4509 | ||
4510 | updelay /= miimon; | |
4511 | ||
4512 | if ((downdelay % miimon) != 0) { | |
4513 | printk(KERN_WARNING DRV_NAME | |
4514 | ": Warning: downdelay (%d) is not a multiple " | |
4515 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4516 | downdelay, miimon, | |
4517 | (downdelay / miimon) * miimon); | |
4518 | } | |
4519 | ||
4520 | downdelay /= miimon; | |
4521 | } | |
4522 | ||
4523 | if (arp_interval < 0) { | |
4524 | printk(KERN_WARNING DRV_NAME | |
4525 | ": Warning: arp_interval module parameter (%d) " | |
4526 | ", not in range 0-%d, so it was reset to %d\n", | |
4527 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4528 | arp_interval = BOND_LINK_ARP_INTERV; | |
4529 | } | |
4530 | ||
4531 | for (arp_ip_count = 0; | |
4532 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4533 | arp_ip_count++) { | |
4534 | /* not complete check, but should be good enough to | |
4535 | catch mistakes */ | |
4536 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4537 | printk(KERN_WARNING DRV_NAME | |
4538 | ": Warning: bad arp_ip_target module parameter " | |
4539 | "(%s), ARP monitoring will not be performed\n", | |
4540 | arp_ip_target[arp_ip_count]); | |
4541 | arp_interval = 0; | |
4542 | } else { | |
4543 | u32 ip = in_aton(arp_ip_target[arp_ip_count]); | |
4544 | arp_target[arp_ip_count] = ip; | |
4545 | } | |
4546 | } | |
4547 | ||
4548 | if (arp_interval && !arp_ip_count) { | |
4549 | /* don't allow arping if no arp_ip_target given... */ | |
4550 | printk(KERN_WARNING DRV_NAME | |
4551 | ": Warning: arp_interval module parameter (%d) " | |
4552 | "specified without providing an arp_ip_target " | |
4553 | "parameter, arp_interval was reset to 0\n", | |
4554 | arp_interval); | |
4555 | arp_interval = 0; | |
4556 | } | |
4557 | ||
4558 | if (miimon) { | |
4559 | printk(KERN_INFO DRV_NAME | |
4560 | ": MII link monitoring set to %d ms\n", | |
4561 | miimon); | |
4562 | } else if (arp_interval) { | |
4563 | int i; | |
4564 | ||
4565 | printk(KERN_INFO DRV_NAME | |
4566 | ": ARP monitoring set to %d ms with %d target(s):", | |
4567 | arp_interval, arp_ip_count); | |
4568 | ||
4569 | for (i = 0; i < arp_ip_count; i++) | |
4570 | printk (" %s", arp_ip_target[i]); | |
4571 | ||
4572 | printk("\n"); | |
4573 | ||
4574 | } else { | |
4575 | /* miimon and arp_interval not set, we need one so things | |
4576 | * work as expected, see bonding.txt for details | |
4577 | */ | |
4578 | printk(KERN_WARNING DRV_NAME | |
4579 | ": Warning: either miimon or arp_interval and " | |
4580 | "arp_ip_target module parameters must be specified, " | |
4581 | "otherwise bonding will not detect link failures! see " | |
4582 | "bonding.txt for details.\n"); | |
4583 | } | |
4584 | ||
4585 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4586 | /* currently, using a primary only makes sense | |
4587 | * in active backup, TLB or ALB modes | |
4588 | */ | |
4589 | printk(KERN_WARNING DRV_NAME | |
4590 | ": Warning: %s primary device specified but has no " | |
4591 | "effect in %s mode\n", | |
4592 | primary, bond_mode_name(bond_mode)); | |
4593 | primary = NULL; | |
4594 | } | |
4595 | ||
4596 | /* fill params struct with the proper values */ | |
4597 | params->mode = bond_mode; | |
4598 | params->miimon = miimon; | |
4599 | params->arp_interval = arp_interval; | |
4600 | params->updelay = updelay; | |
4601 | params->downdelay = downdelay; | |
4602 | params->use_carrier = use_carrier; | |
4603 | params->lacp_fast = lacp_fast; | |
4604 | params->primary[0] = 0; | |
4605 | ||
4606 | if (primary) { | |
4607 | strncpy(params->primary, primary, IFNAMSIZ); | |
4608 | params->primary[IFNAMSIZ - 1] = 0; | |
4609 | } | |
4610 | ||
4611 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4612 | ||
4613 | return 0; | |
4614 | } | |
4615 | ||
4616 | static int __init bonding_init(void) | |
4617 | { | |
4618 | struct bond_params params; | |
4619 | int i; | |
4620 | int res; | |
4621 | ||
4622 | printk(KERN_INFO "%s", version); | |
4623 | ||
4624 | res = bond_check_params(¶ms); | |
4625 | if (res) { | |
4626 | return res; | |
4627 | } | |
4628 | ||
4629 | rtnl_lock(); | |
4630 | ||
4631 | #ifdef CONFIG_PROC_FS | |
4632 | bond_create_proc_dir(); | |
4633 | #endif | |
4634 | ||
4635 | for (i = 0; i < max_bonds; i++) { | |
4636 | struct net_device *bond_dev; | |
4637 | ||
4638 | bond_dev = alloc_netdev(sizeof(struct bonding), "", ether_setup); | |
4639 | if (!bond_dev) { | |
4640 | res = -ENOMEM; | |
4641 | goto out_err; | |
4642 | } | |
4643 | ||
4644 | res = dev_alloc_name(bond_dev, "bond%d"); | |
4645 | if (res < 0) { | |
4646 | free_netdev(bond_dev); | |
4647 | goto out_err; | |
4648 | } | |
4649 | ||
4650 | /* bond_init() must be called after dev_alloc_name() (for the | |
4651 | * /proc files), but before register_netdevice(), because we | |
4652 | * need to set function pointers. | |
4653 | */ | |
4654 | res = bond_init(bond_dev, ¶ms); | |
4655 | if (res < 0) { | |
4656 | free_netdev(bond_dev); | |
4657 | goto out_err; | |
4658 | } | |
4659 | ||
4660 | SET_MODULE_OWNER(bond_dev); | |
4661 | ||
4662 | res = register_netdevice(bond_dev); | |
4663 | if (res < 0) { | |
4664 | bond_deinit(bond_dev); | |
4665 | free_netdev(bond_dev); | |
4666 | goto out_err; | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | rtnl_unlock(); | |
4671 | register_netdevice_notifier(&bond_netdev_notifier); | |
4672 | ||
4673 | return 0; | |
4674 | ||
4675 | out_err: | |
4676 | /* free and unregister all bonds that were successfully added */ | |
4677 | bond_free_all(); | |
4678 | ||
4679 | rtnl_unlock(); | |
4680 | ||
4681 | return res; | |
4682 | } | |
4683 | ||
4684 | static void __exit bonding_exit(void) | |
4685 | { | |
4686 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
4687 | ||
4688 | rtnl_lock(); | |
4689 | bond_free_all(); | |
4690 | rtnl_unlock(); | |
4691 | } | |
4692 | ||
4693 | module_init(bonding_init); | |
4694 | module_exit(bonding_exit); | |
4695 | MODULE_LICENSE("GPL"); | |
4696 | MODULE_VERSION(DRV_VERSION); | |
4697 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4698 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
4699 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
4700 | ||
4701 | /* | |
4702 | * Local variables: | |
4703 | * c-indent-level: 8 | |
4704 | * c-basic-offset: 8 | |
4705 | * tab-width: 8 | |
4706 | * End: | |
4707 | */ | |
4708 |