Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |