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/drivers/net/bonding/bond_sysfs.c

https://bitbucket.org/ndreys/linux-sunxi
C | 1669 lines | 1265 code | 214 blank | 190 comment | 199 complexity | 31fe7d3014d3f11ea84981d56a85a7ef MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
   1/*
   2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms of the GNU General Public License as published by the
   6 * Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful, but
  10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License along
  15 * with this program; if not, write to the Free Software Foundation, Inc.,
  16 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17 *
  18 * The full GNU General Public License is included in this distribution in the
  19 * file called LICENSE.
  20 *
  21 */
  22
  23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25#include <linux/kernel.h>
  26#include <linux/module.h>
  27#include <linux/device.h>
  28#include <linux/sched.h>
  29#include <linux/sysdev.h>
  30#include <linux/fs.h>
  31#include <linux/types.h>
  32#include <linux/string.h>
  33#include <linux/netdevice.h>
  34#include <linux/inetdevice.h>
  35#include <linux/in.h>
  36#include <linux/sysfs.h>
  37#include <linux/ctype.h>
  38#include <linux/inet.h>
  39#include <linux/rtnetlink.h>
  40#include <linux/etherdevice.h>
  41#include <net/net_namespace.h>
  42#include <net/netns/generic.h>
  43#include <linux/nsproxy.h>
  44
  45#include "bonding.h"
  46
  47#define to_dev(obj)	container_of(obj, struct device, kobj)
  48#define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))
  49
  50/*
  51 * "show" function for the bond_masters attribute.
  52 * The class parameter is ignored.
  53 */
  54static ssize_t bonding_show_bonds(struct class *cls,
  55				  struct class_attribute *attr,
  56				  char *buf)
  57{
  58	struct net *net = current->nsproxy->net_ns;
  59	struct bond_net *bn = net_generic(net, bond_net_id);
  60	int res = 0;
  61	struct bonding *bond;
  62
  63	rtnl_lock();
  64
  65	list_for_each_entry(bond, &bn->dev_list, bond_list) {
  66		if (res > (PAGE_SIZE - IFNAMSIZ)) {
  67			/* not enough space for another interface name */
  68			if ((PAGE_SIZE - res) > 10)
  69				res = PAGE_SIZE - 10;
  70			res += sprintf(buf + res, "++more++ ");
  71			break;
  72		}
  73		res += sprintf(buf + res, "%s ", bond->dev->name);
  74	}
  75	if (res)
  76		buf[res-1] = '\n'; /* eat the leftover space */
  77
  78	rtnl_unlock();
  79	return res;
  80}
  81
  82static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
  83{
  84	struct bond_net *bn = net_generic(net, bond_net_id);
  85	struct bonding *bond;
  86
  87	list_for_each_entry(bond, &bn->dev_list, bond_list) {
  88		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  89			return bond->dev;
  90	}
  91	return NULL;
  92}
  93
  94/*
  95 * "store" function for the bond_masters attribute.  This is what
  96 * creates and deletes entire bonds.
  97 *
  98 * The class parameter is ignored.
  99 *
 100 */
 101
 102static ssize_t bonding_store_bonds(struct class *cls,
 103				   struct class_attribute *attr,
 104				   const char *buffer, size_t count)
 105{
 106	struct net *net = current->nsproxy->net_ns;
 107	char command[IFNAMSIZ + 1] = {0, };
 108	char *ifname;
 109	int rv, res = count;
 110
 111	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 112	ifname = command + 1;
 113	if ((strlen(command) <= 1) ||
 114	    !dev_valid_name(ifname))
 115		goto err_no_cmd;
 116
 117	if (command[0] == '+') {
 118		pr_info("%s is being created...\n", ifname);
 119		rv = bond_create(net, ifname);
 120		if (rv) {
 121			if (rv == -EEXIST)
 122				pr_info("%s already exists.\n", ifname);
 123			else
 124				pr_info("%s creation failed.\n", ifname);
 125			res = rv;
 126		}
 127	} else if (command[0] == '-') {
 128		struct net_device *bond_dev;
 129
 130		rtnl_lock();
 131		bond_dev = bond_get_by_name(net, ifname);
 132		if (bond_dev) {
 133			pr_info("%s is being deleted...\n", ifname);
 134			unregister_netdevice(bond_dev);
 135		} else {
 136			pr_err("unable to delete non-existent %s\n", ifname);
 137			res = -ENODEV;
 138		}
 139		rtnl_unlock();
 140	} else
 141		goto err_no_cmd;
 142
 143	/* Always return either count or an error.  If you return 0, you'll
 144	 * get called forever, which is bad.
 145	 */
 146	return res;
 147
 148err_no_cmd:
 149	pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 150	return -EPERM;
 151}
 152
 153/* class attribute for bond_masters file.  This ends up in /sys/class/net */
 154static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 155		  bonding_show_bonds, bonding_store_bonds);
 156
 157int bond_create_slave_symlinks(struct net_device *master,
 158			       struct net_device *slave)
 159{
 160	char linkname[IFNAMSIZ+7];
 161	int ret = 0;
 162
 163	/* first, create a link from the slave back to the master */
 164	ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 165				"master");
 166	if (ret)
 167		return ret;
 168	/* next, create a link from the master to the slave */
 169	sprintf(linkname, "slave_%s", slave->name);
 170	ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 171				linkname);
 172	return ret;
 173
 174}
 175
 176void bond_destroy_slave_symlinks(struct net_device *master,
 177				 struct net_device *slave)
 178{
 179	char linkname[IFNAMSIZ+7];
 180
 181	sysfs_remove_link(&(slave->dev.kobj), "master");
 182	sprintf(linkname, "slave_%s", slave->name);
 183	sysfs_remove_link(&(master->dev.kobj), linkname);
 184}
 185
 186
 187/*
 188 * Show the slaves in the current bond.
 189 */
 190static ssize_t bonding_show_slaves(struct device *d,
 191				   struct device_attribute *attr, char *buf)
 192{
 193	struct slave *slave;
 194	int i, res = 0;
 195	struct bonding *bond = to_bond(d);
 196
 197	read_lock(&bond->lock);
 198	bond_for_each_slave(bond, slave, i) {
 199		if (res > (PAGE_SIZE - IFNAMSIZ)) {
 200			/* not enough space for another interface name */
 201			if ((PAGE_SIZE - res) > 10)
 202				res = PAGE_SIZE - 10;
 203			res += sprintf(buf + res, "++more++ ");
 204			break;
 205		}
 206		res += sprintf(buf + res, "%s ", slave->dev->name);
 207	}
 208	read_unlock(&bond->lock);
 209	if (res)
 210		buf[res-1] = '\n'; /* eat the leftover space */
 211	return res;
 212}
 213
 214/*
 215 * Set the slaves in the current bond.  The bond interface must be
 216 * up for this to succeed.
 217 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 218 * All hard work should be done there.
 219 */
 220static ssize_t bonding_store_slaves(struct device *d,
 221				    struct device_attribute *attr,
 222				    const char *buffer, size_t count)
 223{
 224	char command[IFNAMSIZ + 1] = { 0, };
 225	char *ifname;
 226	int res, ret = count;
 227	struct net_device *dev;
 228	struct bonding *bond = to_bond(d);
 229
 230	if (!rtnl_trylock())
 231		return restart_syscall();
 232
 233	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 234	ifname = command + 1;
 235	if ((strlen(command) <= 1) ||
 236	    !dev_valid_name(ifname))
 237		goto err_no_cmd;
 238
 239	dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 240	if (!dev) {
 241		pr_info("%s: Interface %s does not exist!\n",
 242			bond->dev->name, ifname);
 243		ret = -ENODEV;
 244		goto out;
 245	}
 246
 247	switch (command[0]) {
 248	case '+':
 249		pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 250		res = bond_enslave(bond->dev, dev);
 251		break;
 252
 253	case '-':
 254		pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 255		res = bond_release(bond->dev, dev);
 256		break;
 257
 258	default:
 259		goto err_no_cmd;
 260	}
 261
 262	if (res)
 263		ret = res;
 264	goto out;
 265
 266err_no_cmd:
 267	pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 268	       bond->dev->name);
 269	ret = -EPERM;
 270
 271out:
 272	rtnl_unlock();
 273	return ret;
 274}
 275
 276static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 277		   bonding_store_slaves);
 278
 279/*
 280 * Show and set the bonding mode.  The bond interface must be down to
 281 * change the mode.
 282 */
 283static ssize_t bonding_show_mode(struct device *d,
 284				 struct device_attribute *attr, char *buf)
 285{
 286	struct bonding *bond = to_bond(d);
 287
 288	return sprintf(buf, "%s %d\n",
 289			bond_mode_tbl[bond->params.mode].modename,
 290			bond->params.mode);
 291}
 292
 293static ssize_t bonding_store_mode(struct device *d,
 294				  struct device_attribute *attr,
 295				  const char *buf, size_t count)
 296{
 297	int new_value, ret = count;
 298	struct bonding *bond = to_bond(d);
 299
 300	if (bond->dev->flags & IFF_UP) {
 301		pr_err("unable to update mode of %s because interface is up.\n",
 302		       bond->dev->name);
 303		ret = -EPERM;
 304		goto out;
 305	}
 306
 307	new_value = bond_parse_parm(buf, bond_mode_tbl);
 308	if (new_value < 0)  {
 309		pr_err("%s: Ignoring invalid mode value %.*s.\n",
 310		       bond->dev->name, (int)strlen(buf) - 1, buf);
 311		ret = -EINVAL;
 312		goto out;
 313	}
 314	if ((new_value == BOND_MODE_ALB ||
 315	     new_value == BOND_MODE_TLB) &&
 316	    bond->params.arp_interval) {
 317		pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 318		       bond->dev->name, bond_mode_tbl[new_value].modename);
 319		ret = -EINVAL;
 320		goto out;
 321	}
 322
 323	bond->params.mode = new_value;
 324	bond_set_mode_ops(bond, bond->params.mode);
 325	pr_info("%s: setting mode to %s (%d).\n",
 326		bond->dev->name, bond_mode_tbl[new_value].modename,
 327		new_value);
 328out:
 329	return ret;
 330}
 331static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 332		   bonding_show_mode, bonding_store_mode);
 333
 334/*
 335 * Show and set the bonding transmit hash method.
 336 * The bond interface must be down to change the xmit hash policy.
 337 */
 338static ssize_t bonding_show_xmit_hash(struct device *d,
 339				      struct device_attribute *attr,
 340				      char *buf)
 341{
 342	struct bonding *bond = to_bond(d);
 343
 344	return sprintf(buf, "%s %d\n",
 345		       xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 346		       bond->params.xmit_policy);
 347}
 348
 349static ssize_t bonding_store_xmit_hash(struct device *d,
 350				       struct device_attribute *attr,
 351				       const char *buf, size_t count)
 352{
 353	int new_value, ret = count;
 354	struct bonding *bond = to_bond(d);
 355
 356	if (bond->dev->flags & IFF_UP) {
 357		pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 358		       bond->dev->name);
 359		ret = -EPERM;
 360		goto out;
 361	}
 362
 363	new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 364	if (new_value < 0)  {
 365		pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 366		       bond->dev->name,
 367		       (int)strlen(buf) - 1, buf);
 368		ret = -EINVAL;
 369		goto out;
 370	} else {
 371		bond->params.xmit_policy = new_value;
 372		bond_set_mode_ops(bond, bond->params.mode);
 373		pr_info("%s: setting xmit hash policy to %s (%d).\n",
 374			bond->dev->name,
 375			xmit_hashtype_tbl[new_value].modename, new_value);
 376	}
 377out:
 378	return ret;
 379}
 380static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 381		   bonding_show_xmit_hash, bonding_store_xmit_hash);
 382
 383/*
 384 * Show and set arp_validate.
 385 */
 386static ssize_t bonding_show_arp_validate(struct device *d,
 387					 struct device_attribute *attr,
 388					 char *buf)
 389{
 390	struct bonding *bond = to_bond(d);
 391
 392	return sprintf(buf, "%s %d\n",
 393		       arp_validate_tbl[bond->params.arp_validate].modename,
 394		       bond->params.arp_validate);
 395}
 396
 397static ssize_t bonding_store_arp_validate(struct device *d,
 398					  struct device_attribute *attr,
 399					  const char *buf, size_t count)
 400{
 401	int new_value;
 402	struct bonding *bond = to_bond(d);
 403
 404	new_value = bond_parse_parm(buf, arp_validate_tbl);
 405	if (new_value < 0) {
 406		pr_err("%s: Ignoring invalid arp_validate value %s\n",
 407		       bond->dev->name, buf);
 408		return -EINVAL;
 409	}
 410	if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 411		pr_err("%s: arp_validate only supported in active-backup mode.\n",
 412		       bond->dev->name);
 413		return -EINVAL;
 414	}
 415	pr_info("%s: setting arp_validate to %s (%d).\n",
 416		bond->dev->name, arp_validate_tbl[new_value].modename,
 417		new_value);
 418
 419	bond->params.arp_validate = new_value;
 420
 421	return count;
 422}
 423
 424static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 425		   bonding_store_arp_validate);
 426
 427/*
 428 * Show and store fail_over_mac.  User only allowed to change the
 429 * value when there are no slaves.
 430 */
 431static ssize_t bonding_show_fail_over_mac(struct device *d,
 432					  struct device_attribute *attr,
 433					  char *buf)
 434{
 435	struct bonding *bond = to_bond(d);
 436
 437	return sprintf(buf, "%s %d\n",
 438		       fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 439		       bond->params.fail_over_mac);
 440}
 441
 442static ssize_t bonding_store_fail_over_mac(struct device *d,
 443					   struct device_attribute *attr,
 444					   const char *buf, size_t count)
 445{
 446	int new_value;
 447	struct bonding *bond = to_bond(d);
 448
 449	if (bond->slave_cnt != 0) {
 450		pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 451		       bond->dev->name);
 452		return -EPERM;
 453	}
 454
 455	new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 456	if (new_value < 0) {
 457		pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 458		       bond->dev->name, buf);
 459		return -EINVAL;
 460	}
 461
 462	bond->params.fail_over_mac = new_value;
 463	pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 464		bond->dev->name, fail_over_mac_tbl[new_value].modename,
 465		new_value);
 466
 467	return count;
 468}
 469
 470static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 471		   bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 472
 473/*
 474 * Show and set the arp timer interval.  There are two tricky bits
 475 * here.  First, if ARP monitoring is activated, then we must disable
 476 * MII monitoring.  Second, if the ARP timer isn't running, we must
 477 * start it.
 478 */
 479static ssize_t bonding_show_arp_interval(struct device *d,
 480					 struct device_attribute *attr,
 481					 char *buf)
 482{
 483	struct bonding *bond = to_bond(d);
 484
 485	return sprintf(buf, "%d\n", bond->params.arp_interval);
 486}
 487
 488static ssize_t bonding_store_arp_interval(struct device *d,
 489					  struct device_attribute *attr,
 490					  const char *buf, size_t count)
 491{
 492	int new_value, ret = count;
 493	struct bonding *bond = to_bond(d);
 494
 495	if (sscanf(buf, "%d", &new_value) != 1) {
 496		pr_err("%s: no arp_interval value specified.\n",
 497		       bond->dev->name);
 498		ret = -EINVAL;
 499		goto out;
 500	}
 501	if (new_value < 0) {
 502		pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 503		       bond->dev->name, new_value, INT_MAX);
 504		ret = -EINVAL;
 505		goto out;
 506	}
 507	if (bond->params.mode == BOND_MODE_ALB ||
 508	    bond->params.mode == BOND_MODE_TLB) {
 509		pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 510			bond->dev->name, bond->dev->name);
 511		ret = -EINVAL;
 512		goto out;
 513	}
 514	pr_info("%s: Setting ARP monitoring interval to %d.\n",
 515		bond->dev->name, new_value);
 516	bond->params.arp_interval = new_value;
 517	if (bond->params.miimon) {
 518		pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 519			bond->dev->name, bond->dev->name);
 520		bond->params.miimon = 0;
 521		if (delayed_work_pending(&bond->mii_work)) {
 522			cancel_delayed_work(&bond->mii_work);
 523			flush_workqueue(bond->wq);
 524		}
 525	}
 526	if (!bond->params.arp_targets[0]) {
 527		pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 528			bond->dev->name);
 529	}
 530	if (bond->dev->flags & IFF_UP) {
 531		/* If the interface is up, we may need to fire off
 532		 * the ARP timer.  If the interface is down, the
 533		 * timer will get fired off when the open function
 534		 * is called.
 535		 */
 536		if (!delayed_work_pending(&bond->arp_work)) {
 537			if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 538				INIT_DELAYED_WORK(&bond->arp_work,
 539						  bond_activebackup_arp_mon);
 540			else
 541				INIT_DELAYED_WORK(&bond->arp_work,
 542						  bond_loadbalance_arp_mon);
 543
 544			queue_delayed_work(bond->wq, &bond->arp_work, 0);
 545		}
 546	}
 547
 548out:
 549	return ret;
 550}
 551static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 552		   bonding_show_arp_interval, bonding_store_arp_interval);
 553
 554/*
 555 * Show and set the arp targets.
 556 */
 557static ssize_t bonding_show_arp_targets(struct device *d,
 558					struct device_attribute *attr,
 559					char *buf)
 560{
 561	int i, res = 0;
 562	struct bonding *bond = to_bond(d);
 563
 564	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 565		if (bond->params.arp_targets[i])
 566			res += sprintf(buf + res, "%pI4 ",
 567				       &bond->params.arp_targets[i]);
 568	}
 569	if (res)
 570		buf[res-1] = '\n'; /* eat the leftover space */
 571	return res;
 572}
 573
 574static ssize_t bonding_store_arp_targets(struct device *d,
 575					 struct device_attribute *attr,
 576					 const char *buf, size_t count)
 577{
 578	__be32 newtarget;
 579	int i = 0, done = 0, ret = count;
 580	struct bonding *bond = to_bond(d);
 581	__be32 *targets;
 582
 583	targets = bond->params.arp_targets;
 584	newtarget = in_aton(buf + 1);
 585	/* look for adds */
 586	if (buf[0] == '+') {
 587		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 588			pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 589			       bond->dev->name, &newtarget);
 590			ret = -EINVAL;
 591			goto out;
 592		}
 593		/* look for an empty slot to put the target in, and check for dupes */
 594		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 595			if (targets[i] == newtarget) { /* duplicate */
 596				pr_err("%s: ARP target %pI4 is already present\n",
 597				       bond->dev->name, &newtarget);
 598				ret = -EINVAL;
 599				goto out;
 600			}
 601			if (targets[i] == 0) {
 602				pr_info("%s: adding ARP target %pI4.\n",
 603					bond->dev->name, &newtarget);
 604				done = 1;
 605				targets[i] = newtarget;
 606			}
 607		}
 608		if (!done) {
 609			pr_err("%s: ARP target table is full!\n",
 610			       bond->dev->name);
 611			ret = -EINVAL;
 612			goto out;
 613		}
 614
 615	} else if (buf[0] == '-')	{
 616		if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 617			pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 618			       bond->dev->name, &newtarget);
 619			ret = -EINVAL;
 620			goto out;
 621		}
 622
 623		for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 624			if (targets[i] == newtarget) {
 625				int j;
 626				pr_info("%s: removing ARP target %pI4.\n",
 627					bond->dev->name, &newtarget);
 628				for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 629					targets[j] = targets[j+1];
 630
 631				targets[j] = 0;
 632				done = 1;
 633			}
 634		}
 635		if (!done) {
 636			pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 637				bond->dev->name, &newtarget);
 638			ret = -EINVAL;
 639			goto out;
 640		}
 641	} else {
 642		pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 643		       bond->dev->name);
 644		ret = -EPERM;
 645		goto out;
 646	}
 647
 648out:
 649	return ret;
 650}
 651static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 652
 653/*
 654 * Show and set the up and down delays.  These must be multiples of the
 655 * MII monitoring value, and are stored internally as the multiplier.
 656 * Thus, we must translate to MS for the real world.
 657 */
 658static ssize_t bonding_show_downdelay(struct device *d,
 659				      struct device_attribute *attr,
 660				      char *buf)
 661{
 662	struct bonding *bond = to_bond(d);
 663
 664	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 665}
 666
 667static ssize_t bonding_store_downdelay(struct device *d,
 668				       struct device_attribute *attr,
 669				       const char *buf, size_t count)
 670{
 671	int new_value, ret = count;
 672	struct bonding *bond = to_bond(d);
 673
 674	if (!(bond->params.miimon)) {
 675		pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 676		       bond->dev->name);
 677		ret = -EPERM;
 678		goto out;
 679	}
 680
 681	if (sscanf(buf, "%d", &new_value) != 1) {
 682		pr_err("%s: no down delay value specified.\n", bond->dev->name);
 683		ret = -EINVAL;
 684		goto out;
 685	}
 686	if (new_value < 0) {
 687		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 688		       bond->dev->name, new_value, 1, INT_MAX);
 689		ret = -EINVAL;
 690		goto out;
 691	} else {
 692		if ((new_value % bond->params.miimon) != 0) {
 693			pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 694				   bond->dev->name, new_value,
 695				   bond->params.miimon,
 696				   (new_value / bond->params.miimon) *
 697				   bond->params.miimon);
 698		}
 699		bond->params.downdelay = new_value / bond->params.miimon;
 700		pr_info("%s: Setting down delay to %d.\n",
 701			bond->dev->name,
 702			bond->params.downdelay * bond->params.miimon);
 703
 704	}
 705
 706out:
 707	return ret;
 708}
 709static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 710		   bonding_show_downdelay, bonding_store_downdelay);
 711
 712static ssize_t bonding_show_updelay(struct device *d,
 713				    struct device_attribute *attr,
 714				    char *buf)
 715{
 716	struct bonding *bond = to_bond(d);
 717
 718	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 719
 720}
 721
 722static ssize_t bonding_store_updelay(struct device *d,
 723				     struct device_attribute *attr,
 724				     const char *buf, size_t count)
 725{
 726	int new_value, ret = count;
 727	struct bonding *bond = to_bond(d);
 728
 729	if (!(bond->params.miimon)) {
 730		pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 731		       bond->dev->name);
 732		ret = -EPERM;
 733		goto out;
 734	}
 735
 736	if (sscanf(buf, "%d", &new_value) != 1) {
 737		pr_err("%s: no up delay value specified.\n",
 738		       bond->dev->name);
 739		ret = -EINVAL;
 740		goto out;
 741	}
 742	if (new_value < 0) {
 743		pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 744		       bond->dev->name, new_value, 1, INT_MAX);
 745		ret = -EINVAL;
 746		goto out;
 747	} else {
 748		if ((new_value % bond->params.miimon) != 0) {
 749			pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 750				   bond->dev->name, new_value,
 751				   bond->params.miimon,
 752				   (new_value / bond->params.miimon) *
 753				   bond->params.miimon);
 754		}
 755		bond->params.updelay = new_value / bond->params.miimon;
 756		pr_info("%s: Setting up delay to %d.\n",
 757			bond->dev->name,
 758			bond->params.updelay * bond->params.miimon);
 759	}
 760
 761out:
 762	return ret;
 763}
 764static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 765		   bonding_show_updelay, bonding_store_updelay);
 766
 767/*
 768 * Show and set the LACP interval.  Interface must be down, and the mode
 769 * must be set to 802.3ad mode.
 770 */
 771static ssize_t bonding_show_lacp(struct device *d,
 772				 struct device_attribute *attr,
 773				 char *buf)
 774{
 775	struct bonding *bond = to_bond(d);
 776
 777	return sprintf(buf, "%s %d\n",
 778		bond_lacp_tbl[bond->params.lacp_fast].modename,
 779		bond->params.lacp_fast);
 780}
 781
 782static ssize_t bonding_store_lacp(struct device *d,
 783				  struct device_attribute *attr,
 784				  const char *buf, size_t count)
 785{
 786	int new_value, ret = count;
 787	struct bonding *bond = to_bond(d);
 788
 789	if (bond->dev->flags & IFF_UP) {
 790		pr_err("%s: Unable to update LACP rate because interface is up.\n",
 791		       bond->dev->name);
 792		ret = -EPERM;
 793		goto out;
 794	}
 795
 796	if (bond->params.mode != BOND_MODE_8023AD) {
 797		pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 798		       bond->dev->name);
 799		ret = -EPERM;
 800		goto out;
 801	}
 802
 803	new_value = bond_parse_parm(buf, bond_lacp_tbl);
 804
 805	if ((new_value == 1) || (new_value == 0)) {
 806		bond->params.lacp_fast = new_value;
 807		pr_info("%s: Setting LACP rate to %s (%d).\n",
 808			bond->dev->name, bond_lacp_tbl[new_value].modename,
 809			new_value);
 810	} else {
 811		pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 812		       bond->dev->name, (int)strlen(buf) - 1, buf);
 813		ret = -EINVAL;
 814	}
 815out:
 816	return ret;
 817}
 818static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 819		   bonding_show_lacp, bonding_store_lacp);
 820
 821static ssize_t bonding_show_ad_select(struct device *d,
 822				      struct device_attribute *attr,
 823				      char *buf)
 824{
 825	struct bonding *bond = to_bond(d);
 826
 827	return sprintf(buf, "%s %d\n",
 828		ad_select_tbl[bond->params.ad_select].modename,
 829		bond->params.ad_select);
 830}
 831
 832
 833static ssize_t bonding_store_ad_select(struct device *d,
 834				       struct device_attribute *attr,
 835				       const char *buf, size_t count)
 836{
 837	int new_value, ret = count;
 838	struct bonding *bond = to_bond(d);
 839
 840	if (bond->dev->flags & IFF_UP) {
 841		pr_err("%s: Unable to update ad_select because interface is up.\n",
 842		       bond->dev->name);
 843		ret = -EPERM;
 844		goto out;
 845	}
 846
 847	new_value = bond_parse_parm(buf, ad_select_tbl);
 848
 849	if (new_value != -1) {
 850		bond->params.ad_select = new_value;
 851		pr_info("%s: Setting ad_select to %s (%d).\n",
 852			bond->dev->name, ad_select_tbl[new_value].modename,
 853			new_value);
 854	} else {
 855		pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 856		       bond->dev->name, (int)strlen(buf) - 1, buf);
 857		ret = -EINVAL;
 858	}
 859out:
 860	return ret;
 861}
 862static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 863		   bonding_show_ad_select, bonding_store_ad_select);
 864
 865/*
 866 * Show and set the number of peer notifications to send after a failover event.
 867 */
 868static ssize_t bonding_show_num_peer_notif(struct device *d,
 869					   struct device_attribute *attr,
 870					   char *buf)
 871{
 872	struct bonding *bond = to_bond(d);
 873	return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 874}
 875
 876static ssize_t bonding_store_num_peer_notif(struct device *d,
 877					    struct device_attribute *attr,
 878					    const char *buf, size_t count)
 879{
 880	struct bonding *bond = to_bond(d);
 881	int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 882	return err ? err : count;
 883}
 884static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 885		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 886static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 887		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 888
 889/*
 890 * Show and set the MII monitor interval.  There are two tricky bits
 891 * here.  First, if MII monitoring is activated, then we must disable
 892 * ARP monitoring.  Second, if the timer isn't running, we must
 893 * start it.
 894 */
 895static ssize_t bonding_show_miimon(struct device *d,
 896				   struct device_attribute *attr,
 897				   char *buf)
 898{
 899	struct bonding *bond = to_bond(d);
 900
 901	return sprintf(buf, "%d\n", bond->params.miimon);
 902}
 903
 904static ssize_t bonding_store_miimon(struct device *d,
 905				    struct device_attribute *attr,
 906				    const char *buf, size_t count)
 907{
 908	int new_value, ret = count;
 909	struct bonding *bond = to_bond(d);
 910
 911	if (sscanf(buf, "%d", &new_value) != 1) {
 912		pr_err("%s: no miimon value specified.\n",
 913		       bond->dev->name);
 914		ret = -EINVAL;
 915		goto out;
 916	}
 917	if (new_value < 0) {
 918		pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 919		       bond->dev->name, new_value, 1, INT_MAX);
 920		ret = -EINVAL;
 921		goto out;
 922	} else {
 923		pr_info("%s: Setting MII monitoring interval to %d.\n",
 924			bond->dev->name, new_value);
 925		bond->params.miimon = new_value;
 926		if (bond->params.updelay)
 927			pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 928				bond->dev->name,
 929				bond->params.updelay * bond->params.miimon);
 930		if (bond->params.downdelay)
 931			pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 932				bond->dev->name,
 933				bond->params.downdelay * bond->params.miimon);
 934		if (bond->params.arp_interval) {
 935			pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 936				bond->dev->name);
 937			bond->params.arp_interval = 0;
 938			if (bond->params.arp_validate) {
 939				bond->params.arp_validate =
 940					BOND_ARP_VALIDATE_NONE;
 941			}
 942			if (delayed_work_pending(&bond->arp_work)) {
 943				cancel_delayed_work(&bond->arp_work);
 944				flush_workqueue(bond->wq);
 945			}
 946		}
 947
 948		if (bond->dev->flags & IFF_UP) {
 949			/* If the interface is up, we may need to fire off
 950			 * the MII timer. If the interface is down, the
 951			 * timer will get fired off when the open function
 952			 * is called.
 953			 */
 954			if (!delayed_work_pending(&bond->mii_work)) {
 955				INIT_DELAYED_WORK(&bond->mii_work,
 956						  bond_mii_monitor);
 957				queue_delayed_work(bond->wq,
 958						   &bond->mii_work, 0);
 959			}
 960		}
 961	}
 962out:
 963	return ret;
 964}
 965static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 966		   bonding_show_miimon, bonding_store_miimon);
 967
 968/*
 969 * Show and set the primary slave.  The store function is much
 970 * simpler than bonding_store_slaves function because it only needs to
 971 * handle one interface name.
 972 * The bond must be a mode that supports a primary for this be
 973 * set.
 974 */
 975static ssize_t bonding_show_primary(struct device *d,
 976				    struct device_attribute *attr,
 977				    char *buf)
 978{
 979	int count = 0;
 980	struct bonding *bond = to_bond(d);
 981
 982	if (bond->primary_slave)
 983		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
 984
 985	return count;
 986}
 987
 988static ssize_t bonding_store_primary(struct device *d,
 989				     struct device_attribute *attr,
 990				     const char *buf, size_t count)
 991{
 992	int i;
 993	struct slave *slave;
 994	struct bonding *bond = to_bond(d);
 995	char ifname[IFNAMSIZ];
 996
 997	if (!rtnl_trylock())
 998		return restart_syscall();
 999	block_netpoll_tx();
1000	read_lock(&bond->lock);
1001	write_lock_bh(&bond->curr_slave_lock);
1002
1003	if (!USES_PRIMARY(bond->params.mode)) {
1004		pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1005			bond->dev->name, bond->dev->name, bond->params.mode);
1006		goto out;
1007	}
1008
1009	sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1010
1011	/* check to see if we are clearing primary */
1012	if (!strlen(ifname) || buf[0] == '\n') {
1013		pr_info("%s: Setting primary slave to None.\n",
1014			bond->dev->name);
1015		bond->primary_slave = NULL;
1016		bond_select_active_slave(bond);
1017		goto out;
1018	}
1019
1020	bond_for_each_slave(bond, slave, i) {
1021		if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1022			pr_info("%s: Setting %s as primary slave.\n",
1023				bond->dev->name, slave->dev->name);
1024			bond->primary_slave = slave;
1025			strcpy(bond->params.primary, slave->dev->name);
1026			bond_select_active_slave(bond);
1027			goto out;
1028		}
1029	}
1030
1031	pr_info("%s: Unable to set %.*s as primary slave.\n",
1032		bond->dev->name, (int)strlen(buf) - 1, buf);
1033out:
1034	write_unlock_bh(&bond->curr_slave_lock);
1035	read_unlock(&bond->lock);
1036	unblock_netpoll_tx();
1037	rtnl_unlock();
1038
1039	return count;
1040}
1041static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1042		   bonding_show_primary, bonding_store_primary);
1043
1044/*
1045 * Show and set the primary_reselect flag.
1046 */
1047static ssize_t bonding_show_primary_reselect(struct device *d,
1048					     struct device_attribute *attr,
1049					     char *buf)
1050{
1051	struct bonding *bond = to_bond(d);
1052
1053	return sprintf(buf, "%s %d\n",
1054		       pri_reselect_tbl[bond->params.primary_reselect].modename,
1055		       bond->params.primary_reselect);
1056}
1057
1058static ssize_t bonding_store_primary_reselect(struct device *d,
1059					      struct device_attribute *attr,
1060					      const char *buf, size_t count)
1061{
1062	int new_value, ret = count;
1063	struct bonding *bond = to_bond(d);
1064
1065	if (!rtnl_trylock())
1066		return restart_syscall();
1067
1068	new_value = bond_parse_parm(buf, pri_reselect_tbl);
1069	if (new_value < 0)  {
1070		pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1071		       bond->dev->name,
1072		       (int) strlen(buf) - 1, buf);
1073		ret = -EINVAL;
1074		goto out;
1075	}
1076
1077	bond->params.primary_reselect = new_value;
1078	pr_info("%s: setting primary_reselect to %s (%d).\n",
1079		bond->dev->name, pri_reselect_tbl[new_value].modename,
1080		new_value);
1081
1082	block_netpoll_tx();
1083	read_lock(&bond->lock);
1084	write_lock_bh(&bond->curr_slave_lock);
1085	bond_select_active_slave(bond);
1086	write_unlock_bh(&bond->curr_slave_lock);
1087	read_unlock(&bond->lock);
1088	unblock_netpoll_tx();
1089out:
1090	rtnl_unlock();
1091	return ret;
1092}
1093static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1094		   bonding_show_primary_reselect,
1095		   bonding_store_primary_reselect);
1096
1097/*
1098 * Show and set the use_carrier flag.
1099 */
1100static ssize_t bonding_show_carrier(struct device *d,
1101				    struct device_attribute *attr,
1102				    char *buf)
1103{
1104	struct bonding *bond = to_bond(d);
1105
1106	return sprintf(buf, "%d\n", bond->params.use_carrier);
1107}
1108
1109static ssize_t bonding_store_carrier(struct device *d,
1110				     struct device_attribute *attr,
1111				     const char *buf, size_t count)
1112{
1113	int new_value, ret = count;
1114	struct bonding *bond = to_bond(d);
1115
1116
1117	if (sscanf(buf, "%d", &new_value) != 1) {
1118		pr_err("%s: no use_carrier value specified.\n",
1119		       bond->dev->name);
1120		ret = -EINVAL;
1121		goto out;
1122	}
1123	if ((new_value == 0) || (new_value == 1)) {
1124		bond->params.use_carrier = new_value;
1125		pr_info("%s: Setting use_carrier to %d.\n",
1126			bond->dev->name, new_value);
1127	} else {
1128		pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1129			bond->dev->name, new_value);
1130	}
1131out:
1132	return ret;
1133}
1134static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1135		   bonding_show_carrier, bonding_store_carrier);
1136
1137
1138/*
1139 * Show and set currently active_slave.
1140 */
1141static ssize_t bonding_show_active_slave(struct device *d,
1142					 struct device_attribute *attr,
1143					 char *buf)
1144{
1145	struct slave *curr;
1146	struct bonding *bond = to_bond(d);
1147	int count = 0;
1148
1149	read_lock(&bond->curr_slave_lock);
1150	curr = bond->curr_active_slave;
1151	read_unlock(&bond->curr_slave_lock);
1152
1153	if (USES_PRIMARY(bond->params.mode) && curr)
1154		count = sprintf(buf, "%s\n", curr->dev->name);
1155	return count;
1156}
1157
1158static ssize_t bonding_store_active_slave(struct device *d,
1159					  struct device_attribute *attr,
1160					  const char *buf, size_t count)
1161{
1162	int i;
1163	struct slave *slave;
1164	struct slave *old_active = NULL;
1165	struct slave *new_active = NULL;
1166	struct bonding *bond = to_bond(d);
1167	char ifname[IFNAMSIZ];
1168
1169	if (!rtnl_trylock())
1170		return restart_syscall();
1171
1172	block_netpoll_tx();
1173	read_lock(&bond->lock);
1174	write_lock_bh(&bond->curr_slave_lock);
1175
1176	if (!USES_PRIMARY(bond->params.mode)) {
1177		pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1178			bond->dev->name, bond->dev->name, bond->params.mode);
1179		goto out;
1180	}
1181
1182	sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1183
1184	/* check to see if we are clearing active */
1185	if (!strlen(ifname) || buf[0] == '\n') {
1186		pr_info("%s: Clearing current active slave.\n",
1187			bond->dev->name);
1188		bond->curr_active_slave = NULL;
1189		bond_select_active_slave(bond);
1190		goto out;
1191	}
1192
1193	bond_for_each_slave(bond, slave, i) {
1194		if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1195			old_active = bond->curr_active_slave;
1196			new_active = slave;
1197			if (new_active == old_active) {
1198				/* do nothing */
1199				pr_info("%s: %s is already the current"
1200					" active slave.\n",
1201					bond->dev->name,
1202					slave->dev->name);
1203				goto out;
1204			}
1205			else {
1206				if ((new_active) &&
1207				    (old_active) &&
1208				    (new_active->link == BOND_LINK_UP) &&
1209				    IS_UP(new_active->dev)) {
1210					pr_info("%s: Setting %s as active"
1211						" slave.\n",
1212						bond->dev->name,
1213						slave->dev->name);
1214					bond_change_active_slave(bond,
1215								 new_active);
1216				}
1217				else {
1218					pr_info("%s: Could not set %s as"
1219						" active slave; either %s is"
1220						" down or the link is down.\n",
1221						bond->dev->name,
1222						slave->dev->name,
1223						slave->dev->name);
1224				}
1225				goto out;
1226			}
1227		}
1228	}
1229
1230	pr_info("%s: Unable to set %.*s as active slave.\n",
1231		bond->dev->name, (int)strlen(buf) - 1, buf);
1232 out:
1233	write_unlock_bh(&bond->curr_slave_lock);
1234	read_unlock(&bond->lock);
1235	unblock_netpoll_tx();
1236
1237	rtnl_unlock();
1238
1239	return count;
1240
1241}
1242static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1243		   bonding_show_active_slave, bonding_store_active_slave);
1244
1245
1246/*
1247 * Show link status of the bond interface.
1248 */
1249static ssize_t bonding_show_mii_status(struct device *d,
1250				       struct device_attribute *attr,
1251				       char *buf)
1252{
1253	struct slave *curr;
1254	struct bonding *bond = to_bond(d);
1255
1256	read_lock(&bond->curr_slave_lock);
1257	curr = bond->curr_active_slave;
1258	read_unlock(&bond->curr_slave_lock);
1259
1260	return sprintf(buf, "%s\n", curr ? "up" : "down");
1261}
1262static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1263
1264
1265/*
1266 * Show current 802.3ad aggregator ID.
1267 */
1268static ssize_t bonding_show_ad_aggregator(struct device *d,
1269					  struct device_attribute *attr,
1270					  char *buf)
1271{
1272	int count = 0;
1273	struct bonding *bond = to_bond(d);
1274
1275	if (bond->params.mode == BOND_MODE_8023AD) {
1276		struct ad_info ad_info;
1277		count = sprintf(buf, "%d\n",
1278				(bond_3ad_get_active_agg_info(bond, &ad_info))
1279				?  0 : ad_info.aggregator_id);
1280	}
1281
1282	return count;
1283}
1284static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1285
1286
1287/*
1288 * Show number of active 802.3ad ports.
1289 */
1290static ssize_t bonding_show_ad_num_ports(struct device *d,
1291					 struct device_attribute *attr,
1292					 char *buf)
1293{
1294	int count = 0;
1295	struct bonding *bond = to_bond(d);
1296
1297	if (bond->params.mode == BOND_MODE_8023AD) {
1298		struct ad_info ad_info;
1299		count = sprintf(buf, "%d\n",
1300				(bond_3ad_get_active_agg_info(bond, &ad_info))
1301				?  0 : ad_info.ports);
1302	}
1303
1304	return count;
1305}
1306static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1307
1308
1309/*
1310 * Show current 802.3ad actor key.
1311 */
1312static ssize_t bonding_show_ad_actor_key(struct device *d,
1313					 struct device_attribute *attr,
1314					 char *buf)
1315{
1316	int count = 0;
1317	struct bonding *bond = to_bond(d);
1318
1319	if (bond->params.mode == BOND_MODE_8023AD) {
1320		struct ad_info ad_info;
1321		count = sprintf(buf, "%d\n",
1322				(bond_3ad_get_active_agg_info(bond, &ad_info))
1323				?  0 : ad_info.actor_key);
1324	}
1325
1326	return count;
1327}
1328static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1329
1330
1331/*
1332 * Show current 802.3ad partner key.
1333 */
1334static ssize_t bonding_show_ad_partner_key(struct device *d,
1335					   struct device_attribute *attr,
1336					   char *buf)
1337{
1338	int count = 0;
1339	struct bonding *bond = to_bond(d);
1340
1341	if (bond->params.mode == BOND_MODE_8023AD) {
1342		struct ad_info ad_info;
1343		count = sprintf(buf, "%d\n",
1344				(bond_3ad_get_active_agg_info(bond, &ad_info))
1345				?  0 : ad_info.partner_key);
1346	}
1347
1348	return count;
1349}
1350static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1351
1352
1353/*
1354 * Show current 802.3ad partner mac.
1355 */
1356static ssize_t bonding_show_ad_partner_mac(struct device *d,
1357					   struct device_attribute *attr,
1358					   char *buf)
1359{
1360	int count = 0;
1361	struct bonding *bond = to_bond(d);
1362
1363	if (bond->params.mode == BOND_MODE_8023AD) {
1364		struct ad_info ad_info;
1365		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1366			count = sprintf(buf, "%pM\n", ad_info.partner_system);
1367	}
1368
1369	return count;
1370}
1371static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1372
1373/*
1374 * Show the queue_ids of the slaves in the current bond.
1375 */
1376static ssize_t bonding_show_queue_id(struct device *d,
1377				     struct device_attribute *attr,
1378				     char *buf)
1379{
1380	struct slave *slave;
1381	int i, res = 0;
1382	struct bonding *bond = to_bond(d);
1383
1384	if (!rtnl_trylock())
1385		return restart_syscall();
1386
1387	read_lock(&bond->lock);
1388	bond_for_each_slave(bond, slave, i) {
1389		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1390			/* not enough space for another interface_name:queue_id pair */
1391			if ((PAGE_SIZE - res) > 10)
1392				res = PAGE_SIZE - 10;
1393			res += sprintf(buf + res, "++more++ ");
1394			break;
1395		}
1396		res += sprintf(buf + res, "%s:%d ",
1397			       slave->dev->name, slave->queue_id);
1398	}
1399	read_unlock(&bond->lock);
1400	if (res)
1401		buf[res-1] = '\n'; /* eat the leftover space */
1402	rtnl_unlock();
1403	return res;
1404}
1405
1406/*
1407 * Set the queue_ids of the  slaves in the current bond.  The bond
1408 * interface must be enslaved for this to work.
1409 */
1410static ssize_t bonding_store_queue_id(struct device *d,
1411				      struct device_attribute *attr,
1412				      const char *buffer, size_t count)
1413{
1414	struct slave *slave, *update_slave;
1415	struct bonding *bond = to_bond(d);
1416	u16 qid;
1417	int i, ret = count;
1418	char *delim;
1419	struct net_device *sdev = NULL;
1420
1421	if (!rtnl_trylock())
1422		return restart_syscall();
1423
1424	/* delim will point to queue id if successful */
1425	delim = strchr(buffer, ':');
1426	if (!delim)
1427		goto err_no_cmd;
1428
1429	/*
1430	 * Terminate string that points to device name and bump it
1431	 * up one, so we can read the queue id there.
1432	 */
1433	*delim = '\0';
1434	if (sscanf(++delim, "%hd\n", &qid) != 1)
1435		goto err_no_cmd;
1436
1437	/* Check buffer length, valid ifname and queue id */
1438	if (strlen(buffer) > IFNAMSIZ ||
1439	    !dev_valid_name(buffer) ||
1440	    qid > bond->params.tx_queues)
1441		goto err_no_cmd;
1442
1443	/* Get the pointer to that interface if it exists */
1444	sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1445	if (!sdev)
1446		goto err_no_cmd;
1447
1448	read_lock(&bond->lock);
1449
1450	/* Search for thes slave and check for duplicate qids */
1451	update_slave = NULL;
1452	bond_for_each_slave(bond, slave, i) {
1453		if (sdev == slave->dev)
1454			/*
1455			 * We don't need to check the matching
1456			 * slave for dups, since we're overwriting it
1457			 */
1458			update_slave = slave;
1459		else if (qid && qid == slave->queue_id) {
1460			goto err_no_cmd_unlock;
1461		}
1462	}
1463
1464	if (!update_slave)
1465		goto err_no_cmd_unlock;
1466
1467	/* Actually set the qids for the slave */
1468	update_slave->queue_id = qid;
1469
1470	read_unlock(&bond->lock);
1471out:
1472	rtnl_unlock();
1473	return ret;
1474
1475err_no_cmd_unlock:
1476	read_unlock(&bond->lock);
1477err_no_cmd:
1478	pr_info("invalid input for queue_id set for %s.\n",
1479		bond->dev->name);
1480	ret = -EPERM;
1481	goto out;
1482}
1483
1484static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1485		   bonding_store_queue_id);
1486
1487
1488/*
1489 * Show and set the all_slaves_active flag.
1490 */
1491static ssize_t bonding_show_slaves_active(struct device *d,
1492					  struct device_attribute *attr,
1493					  char *buf)
1494{
1495	struct bonding *bond = to_bond(d);
1496
1497	return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1498}
1499
1500static ssize_t bonding_store_slaves_active(struct device *d,
1501					   struct device_attribute *attr,
1502					   const char *buf, size_t count)
1503{
1504	int i, new_value, ret = count;
1505	struct bonding *bond = to_bond(d);
1506	struct slave *slave;
1507
1508	if (sscanf(buf, "%d", &new_value) != 1) {
1509		pr_err("%s: no all_slaves_active value specified.\n",
1510		       bond->dev->name);
1511		ret = -EINVAL;
1512		goto out;
1513	}
1514
1515	if (new_value == bond->params.all_slaves_active)
1516		goto out;
1517
1518	if ((new_value == 0) || (new_value == 1)) {
1519		bond->params.all_slaves_active = new_value;
1520	} else {
1521		pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1522			bond->dev->name, new_value);
1523		ret = -EINVAL;
1524		goto out;
1525	}
1526
1527	bond_for_each_slave(bond, slave, i) {
1528		if (!bond_is_active_slave(slave)) {
1529			if (new_value)
1530				slave->inactive = 0;
1531			else
1532				slave->inactive = 1;
1533		}
1534	}
1535out:
1536	return ret;
1537}
1538static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1539		   bonding_show_slaves_active, bonding_store_slaves_active);
1540
1541/*
1542 * Show and set the number of IGMP membership reports to send on link failure
1543 */
1544static ssize_t bonding_show_resend_igmp(struct device *d,
1545					struct device_attribute *attr,
1546					char *buf)
1547{
1548	struct bonding *bond = to_bond(d);
1549
1550	return sprintf(buf, "%d\n", bond->params.resend_igmp);
1551}
1552
1553static ssize_t bonding_store_resend_igmp(struct device *d,
1554					 struct device_attribute *attr,
1555					 const char *buf, size_t count)
1556{
1557	int new_value, ret = count;
1558	struct bonding *bond = to_bond(d);
1559
1560	if (sscanf(buf, "%d", &new_value) != 1) {
1561		pr_err("%s: no resend_igmp value specified.\n",
1562		       bond->dev->name);
1563		ret = -EINVAL;
1564		goto out;
1565	}
1566
1567	if (new_value < 0 || new_value > 255) {
1568		pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1569		       bond->dev->name, new_value);
1570		ret = -EINVAL;
1571		goto out;
1572	}
1573
1574	pr_info("%s: Setting resend_igmp to %d.\n",
1575		bond->dev->name, new_value);
1576	bond->params.resend_igmp = new_value;
1577out:
1578	return ret;
1579}
1580
1581static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1582		   bonding_show_resend_igmp, bonding_store_resend_igmp);
1583
1584static struct attribute *per_bond_attrs[] = {
1585	&dev_attr_slaves.attr,
1586	&dev_attr_mode.attr,
1587	&dev_attr_fail_over_mac.attr,
1588	&dev_attr_arp_validate.attr,
1589	&dev_attr_arp_interval.attr,
1590	&dev_attr_arp_ip_target.attr,
1591	&dev_attr_downdelay.attr,
1592	&dev_attr_updelay.attr,
1593	&dev_attr_lacp_rate.attr,
1594	&dev_attr_ad_select.attr,
1595	&dev_attr_xmit_hash_policy.attr,
1596	&dev_attr_num_grat_arp.attr,
1597	&dev_attr_num_unsol_na.attr,
1598	&dev_attr_miimon.attr,
1599	&dev_attr_primary.attr,
1600	&dev_attr_primary_reselect.attr,
1601	&dev_attr_use_carrier.attr,
1602	&dev_attr_active_slave.attr,
1603	&dev_attr_mii_status.attr,
1604	&dev_attr_ad_aggregator.attr,
1605	&dev_attr_ad_num_ports.attr,
1606	&dev_attr_ad_actor_key.attr,
1607	&dev_attr_ad_partner_key.attr,
1608	&dev_attr_ad_partner_mac.attr,
1609	&dev_attr_queue_id.attr,
1610	&dev_attr_all_slaves_active.attr,
1611	&dev_attr_resend_igmp.attr,
1612	NULL,
1613};
1614
1615static struct attribute_group bonding_group = {
1616	.name = "bonding",
1617	.attrs = per_bond_attrs,
1618};
1619
1620/*
1621 * Initialize sysfs.  This sets up the bonding_masters file in
1622 * /sys/class/net.
1623 */
1624int bond_create_sysfs(void)
1625{
1626	int ret;
1627
1628	ret = netdev_class_create_file(&class_attr_bonding_masters);
1629	/*
1630	 * Permit multiple loads of the module by ignoring failures to
1631	 * create the bonding_masters sysfs file.  Bonding devices
1632	 * created by second or subsequent loads of the module will
1633	 * not be listed in, or controllable by, bonding_masters, but
1634	 * will have the usual "bonding" sysfs directory.
1635	 *
1636	 * This is done to preserve backwards compatibility for
1637	 * initscripts/sysconfig, which load bonding multiple times to
1638	 * configure multiple bonding devices.
1639	 */
1640	if (ret == -EEXIST) {
1641		/* Is someone being kinky and naming a device bonding_master? */
1642		if (__dev_get_by_name(&init_net,
1643				      class_attr_bonding_masters.attr.name))
1644			pr_err("network device named %s already exists in sysfs",
1645			       class_attr_bonding_masters.attr.name);
1646		ret = 0;
1647	}
1648
1649	return ret;
1650
1651}
1652
1653/*
1654 * Remove /sys/class/net/bonding_masters.
1655 */
1656void bond_destroy_sysfs(void)
1657{
1658	netdev_class_remove_file(&class_attr_bonding_masters);
1659}
1660
1661/*
1662 * Initialize sysfs for each bond.  This sets up and registers
1663 * the 'bondctl' directory for each individual bond under /sys/class/net.
1664 */
1665void bond_prepare_sysfs_group(struct bonding *bond)
1666{
1667	bond->dev->sysfs_groups[0] = &bonding_group;
1668}
1669