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ubuntu-linux-kernel/drivers/net/bonding/bond_options.c

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/*
* drivers/net/bond/bond_options.c - bonding options
* Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
* Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/errno.h>
#include <linux/if.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/ctype.h>
#include <linux/inet.h>
#include <linux/sched/signal.h>
#include <net/bonding.h>
static int bond_option_active_slave_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_miimon_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_updelay_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_downdelay_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_use_carrier_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_arp_interval_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
static int bond_option_arp_ip_targets_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_arp_validate_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_arp_all_targets_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_primary_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_primary_reselect_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_fail_over_mac_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_xmit_hash_policy_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_resend_igmp_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_num_peer_notif_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_all_slaves_active_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_min_links_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_lp_interval_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_pps_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_lacp_rate_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_ad_select_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_queue_id_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_mode_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_slaves_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_ad_actor_system_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_ad_user_port_key_set(struct bonding *bond,
const struct bond_opt_value *newval);
static const struct bond_opt_value bond_mode_tbl[] = {
{ "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
{ "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
{ "balance-xor", BOND_MODE_XOR, 0},
{ "broadcast", BOND_MODE_BROADCAST, 0},
{ "802.3ad", BOND_MODE_8023AD, 0},
{ "balance-tlb", BOND_MODE_TLB, 0},
{ "balance-alb", BOND_MODE_ALB, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_pps_tbl[] = {
{ "default", 1, BOND_VALFLAG_DEFAULT},
{ "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
{ "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
{ "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
{ "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
{ "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
{ "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_arp_validate_tbl[] = {
{ "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
{ "active", BOND_ARP_VALIDATE_ACTIVE, 0},
{ "backup", BOND_ARP_VALIDATE_BACKUP, 0},
{ "all", BOND_ARP_VALIDATE_ALL, 0},
{ "filter", BOND_ARP_FILTER, 0},
{ "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
{ "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
{ "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
{ "all", BOND_ARP_TARGETS_ALL, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
{ "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
{ "active", BOND_FOM_ACTIVE, 0},
{ "follow", BOND_FOM_FOLLOW, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_intmax_tbl[] = {
{ "off", 0, BOND_VALFLAG_DEFAULT},
{ "maxval", INT_MAX, BOND_VALFLAG_MAX},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_lacp_rate_tbl[] = {
{ "slow", AD_LACP_SLOW, 0},
{ "fast", AD_LACP_FAST, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_ad_select_tbl[] = {
{ "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
{ "bandwidth", BOND_AD_BANDWIDTH, 0},
{ "count", BOND_AD_COUNT, 0},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
{ "off", 0, 0},
{ "maxval", 255, BOND_VALFLAG_MAX},
{ "default", 1, BOND_VALFLAG_DEFAULT},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_primary_reselect_tbl[] = {
{ "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
{ "better", BOND_PRI_RESELECT_BETTER, 0},
{ "failure", BOND_PRI_RESELECT_FAILURE, 0},
{ NULL, -1},
};
static const struct bond_opt_value bond_use_carrier_tbl[] = {
{ "off", 0, 0},
{ "on", 1, BOND_VALFLAG_DEFAULT},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
{ "off", 0, BOND_VALFLAG_DEFAULT},
{ "on", 1, 0},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_resend_igmp_tbl[] = {
{ "off", 0, 0},
{ "maxval", 255, BOND_VALFLAG_MAX},
{ "default", 1, BOND_VALFLAG_DEFAULT},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_lp_interval_tbl[] = {
{ "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
{ "maxval", INT_MAX, BOND_VALFLAG_MAX},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
{ "off", 0, 0},
{ "on", 1, BOND_VALFLAG_DEFAULT},
{ NULL, -1, 0}
};
static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
{ "minval", 1, BOND_VALFLAG_MIN},
{ "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
{ NULL, -1, 0},
};
static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
{ "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
{ "maxval", 1023, BOND_VALFLAG_MAX},
{ NULL, -1, 0},
};
static const struct bond_option bond_opts[BOND_OPT_LAST] = {
[BOND_OPT_MODE] = {
.id = BOND_OPT_MODE,
.name = "mode",
.desc = "bond device mode",
.flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
.values = bond_mode_tbl,
.set = bond_option_mode_set
},
[BOND_OPT_PACKETS_PER_SLAVE] = {
.id = BOND_OPT_PACKETS_PER_SLAVE,
.name = "packets_per_slave",
.desc = "Packets to send per slave in RR mode",
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
.values = bond_pps_tbl,
.set = bond_option_pps_set
},
[BOND_OPT_XMIT_HASH] = {
.id = BOND_OPT_XMIT_HASH,
.name = "xmit_hash_policy",
.desc = "balance-xor, 802.3ad, and tlb hashing method",
.values = bond_xmit_hashtype_tbl,
.set = bond_option_xmit_hash_policy_set
},
[BOND_OPT_ARP_VALIDATE] = {
.id = BOND_OPT_ARP_VALIDATE,
.name = "arp_validate",
.desc = "validate src/dst of ARP probes",
.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
BIT(BOND_MODE_ALB),
.values = bond_arp_validate_tbl,
.set = bond_option_arp_validate_set
},
[BOND_OPT_ARP_ALL_TARGETS] = {
.id = BOND_OPT_ARP_ALL_TARGETS,
.name = "arp_all_targets",
.desc = "fail on any/all arp targets timeout",
.values = bond_arp_all_targets_tbl,
.set = bond_option_arp_all_targets_set
},
[BOND_OPT_FAIL_OVER_MAC] = {
.id = BOND_OPT_FAIL_OVER_MAC,
.name = "fail_over_mac",
.desc = "For active-backup, do not set all slaves to the same MAC",
.flags = BOND_OPTFLAG_NOSLAVES,
.values = bond_fail_over_mac_tbl,
.set = bond_option_fail_over_mac_set
},
[BOND_OPT_ARP_INTERVAL] = {
.id = BOND_OPT_ARP_INTERVAL,
.name = "arp_interval",
.desc = "arp interval in milliseconds",
.unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
BIT(BOND_MODE_ALB),
.values = bond_intmax_tbl,
.set = bond_option_arp_interval_set
},
[BOND_OPT_ARP_TARGETS] = {
.id = BOND_OPT_ARP_TARGETS,
.name = "arp_ip_target",
.desc = "arp targets in n.n.n.n form",
.flags = BOND_OPTFLAG_RAWVAL,
.set = bond_option_arp_ip_targets_set
},
[BOND_OPT_DOWNDELAY] = {
.id = BOND_OPT_DOWNDELAY,
.name = "downdelay",
.desc = "Delay before considering link down, in milliseconds",
.values = bond_intmax_tbl,
.set = bond_option_downdelay_set
},
[BOND_OPT_UPDELAY] = {
.id = BOND_OPT_UPDELAY,
.name = "updelay",
.desc = "Delay before considering link up, in milliseconds",
.values = bond_intmax_tbl,
.set = bond_option_updelay_set
},
[BOND_OPT_LACP_RATE] = {
.id = BOND_OPT_LACP_RATE,
.name = "lacp_rate",
.desc = "LACPDU tx rate to request from 802.3ad partner",
.flags = BOND_OPTFLAG_IFDOWN,
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
.values = bond_lacp_rate_tbl,
.set = bond_option_lacp_rate_set
},
[BOND_OPT_MINLINKS] = {
.id = BOND_OPT_MINLINKS,
.name = "min_links",
.desc = "Minimum number of available links before turning on carrier",
.values = bond_intmax_tbl,
.set = bond_option_min_links_set
},
[BOND_OPT_AD_SELECT] = {
.id = BOND_OPT_AD_SELECT,
.name = "ad_select",
.desc = "803.ad aggregation selection logic",
.flags = BOND_OPTFLAG_IFDOWN,
.values = bond_ad_select_tbl,
.set = bond_option_ad_select_set
},
[BOND_OPT_NUM_PEER_NOTIF] = {
.id = BOND_OPT_NUM_PEER_NOTIF,
.name = "num_unsol_na",
.desc = "Number of peer notifications to send on failover event",
.values = bond_num_peer_notif_tbl,
.set = bond_option_num_peer_notif_set
},
[BOND_OPT_MIIMON] = {
.id = BOND_OPT_MIIMON,
.name = "miimon",
.desc = "Link check interval in milliseconds",
.values = bond_intmax_tbl,
.set = bond_option_miimon_set
},
[BOND_OPT_PRIMARY] = {
.id = BOND_OPT_PRIMARY,
.name = "primary",
.desc = "Primary network device to use",
.flags = BOND_OPTFLAG_RAWVAL,
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
BIT(BOND_MODE_TLB) |
BIT(BOND_MODE_ALB)),
.set = bond_option_primary_set
},
[BOND_OPT_PRIMARY_RESELECT] = {
.id = BOND_OPT_PRIMARY_RESELECT,
.name = "primary_reselect",
.desc = "Reselect primary slave once it comes up",
.values = bond_primary_reselect_tbl,
.set = bond_option_primary_reselect_set
},
[BOND_OPT_USE_CARRIER] = {
.id = BOND_OPT_USE_CARRIER,
.name = "use_carrier",
.desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
.values = bond_use_carrier_tbl,
.set = bond_option_use_carrier_set
},
[BOND_OPT_ACTIVE_SLAVE] = {
.id = BOND_OPT_ACTIVE_SLAVE,
.name = "active_slave",
.desc = "Currently active slave",
.flags = BOND_OPTFLAG_RAWVAL,
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
BIT(BOND_MODE_TLB) |
BIT(BOND_MODE_ALB)),
.set = bond_option_active_slave_set
},
[BOND_OPT_QUEUE_ID] = {
.id = BOND_OPT_QUEUE_ID,
.name = "queue_id",
.desc = "Set queue id of a slave",
.flags = BOND_OPTFLAG_RAWVAL,
.set = bond_option_queue_id_set
},
[BOND_OPT_ALL_SLAVES_ACTIVE] = {
.id = BOND_OPT_ALL_SLAVES_ACTIVE,
.name = "all_slaves_active",
.desc = "Keep all frames received on an interface by setting active flag for all slaves",
.values = bond_all_slaves_active_tbl,
.set = bond_option_all_slaves_active_set
},
[BOND_OPT_RESEND_IGMP] = {
.id = BOND_OPT_RESEND_IGMP,
.name = "resend_igmp",
.desc = "Number of IGMP membership reports to send on link failure",
.values = bond_resend_igmp_tbl,
.set = bond_option_resend_igmp_set
},
[BOND_OPT_LP_INTERVAL] = {
.id = BOND_OPT_LP_INTERVAL,
.name = "lp_interval",
.desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
.values = bond_lp_interval_tbl,
.set = bond_option_lp_interval_set
},
[BOND_OPT_SLAVES] = {
.id = BOND_OPT_SLAVES,
.name = "slaves",
.desc = "Slave membership management",
.flags = BOND_OPTFLAG_RAWVAL,
.set = bond_option_slaves_set
},
[BOND_OPT_TLB_DYNAMIC_LB] = {
.id = BOND_OPT_TLB_DYNAMIC_LB,
.name = "tlb_dynamic_lb",
.desc = "Enable dynamic flow shuffling",
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
.values = bond_tlb_dynamic_lb_tbl,
.flags = BOND_OPTFLAG_IFDOWN,
.set = bond_option_tlb_dynamic_lb_set,
},
[BOND_OPT_AD_ACTOR_SYS_PRIO] = {
.id = BOND_OPT_AD_ACTOR_SYS_PRIO,
.name = "ad_actor_sys_prio",
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
.values = bond_ad_actor_sys_prio_tbl,
.set = bond_option_ad_actor_sys_prio_set,
},
[BOND_OPT_AD_ACTOR_SYSTEM] = {
.id = BOND_OPT_AD_ACTOR_SYSTEM,
.name = "ad_actor_system",
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
.flags = BOND_OPTFLAG_RAWVAL,
.set = bond_option_ad_actor_system_set,
},
[BOND_OPT_AD_USER_PORT_KEY] = {
.id = BOND_OPT_AD_USER_PORT_KEY,
.name = "ad_user_port_key",
.unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
.flags = BOND_OPTFLAG_IFDOWN,
.values = bond_ad_user_port_key_tbl,
.set = bond_option_ad_user_port_key_set,
},
[BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
.id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
.name = "num_grat_arp",
.desc = "Number of peer notifications to send on failover event",
.values = bond_num_peer_notif_tbl,
.set = bond_option_num_peer_notif_set
}
};
/* Searches for an option by name */
const struct bond_option *bond_opt_get_by_name(const char *name)
{
const struct bond_option *opt;
int option;
for (option = 0; option < BOND_OPT_LAST; option++) {
opt = bond_opt_get(option);
if (opt && !strcmp(opt->name, name))
return opt;
}
return NULL;
}
/* Searches for a value in opt's values[] table */
const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
{
const struct bond_option *opt;
int i;
opt = bond_opt_get(option);
if (WARN_ON(!opt))
return NULL;
for (i = 0; opt->values && opt->values[i].string; i++)
if (opt->values[i].value == val)
return &opt->values[i];
return NULL;
}
/* Searches for a value in opt's values[] table which matches the flagmask */
static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
u32 flagmask)
{
int i;
for (i = 0; opt->values && opt->values[i].string; i++)
if (opt->values[i].flags & flagmask)
return &opt->values[i];
return NULL;
}
/* If maxval is missing then there's no range to check. In case minval is
* missing then it's considered to be 0.
*/
static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
{
const struct bond_opt_value *minval, *maxval;
minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
if (!maxval || (minval && val < minval->value) || val > maxval->value)
return false;
return true;
}
/**
* bond_opt_parse - parse option value
* @opt: the option to parse against
* @val: value to parse
*
* This function tries to extract the value from @val and check if it's
* a possible match for the option and returns NULL if a match isn't found,
* or the struct_opt_value that matched. It also strips the new line from
* @val->string if it's present.
*/
const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
struct bond_opt_value *val)
{
char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
const struct bond_opt_value *tbl;
const struct bond_opt_value *ret = NULL;
bool checkval;
int i, rv;
/* No parsing if the option wants a raw val */
if (opt->flags & BOND_OPTFLAG_RAWVAL)
return val;
tbl = opt->values;
if (!tbl)
goto out;
/* ULLONG_MAX is used to bypass string processing */
checkval = val->value != ULLONG_MAX;
if (!checkval) {
if (!val->string)
goto out;
p = strchr(val->string, '\n');
if (p)
*p = '\0';
for (p = val->string; *p; p++)
if (!(isdigit(*p) || isspace(*p)))
break;
/* The following code extracts the string to match or the value
* and sets checkval appropriately
*/
if (*p) {
rv = sscanf(val->string, "%32s", valstr);
} else {
rv = sscanf(val->string, "%llu", &val->value);
checkval = true;
}
if (!rv)
goto out;
}
for (i = 0; tbl[i].string; i++) {
/* Check for exact match */
if (checkval) {
if (val->value == tbl[i].value)
ret = &tbl[i];
} else {
if (!strcmp(valstr, "default") &&
(tbl[i].flags & BOND_VALFLAG_DEFAULT))
ret = &tbl[i];
if (!strcmp(valstr, tbl[i].string))
ret = &tbl[i];
}
/* Found an exact match */
if (ret)
goto out;
}
/* Possible range match */
if (checkval && bond_opt_check_range(opt, val->value))
ret = val;
out:
return ret;
}
/* Check opt's dependencies against bond mode and currently set options */
static int bond_opt_check_deps(struct bonding *bond,
const struct bond_option *opt)
{
struct bond_params *params = &bond->params;
if (test_bit(params->mode, &opt->unsuppmodes))
return -EACCES;
if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
return -ENOTEMPTY;
if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
return -EBUSY;
return 0;
}
static void bond_opt_dep_print(struct bonding *bond,
const struct bond_option *opt)
{
const struct bond_opt_value *modeval;
struct bond_params *params;
params = &bond->params;
modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
if (test_bit(params->mode, &opt->unsuppmodes))
netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
opt->name, modeval->string, modeval->value);
}
static void bond_opt_error_interpret(struct bonding *bond,
const struct bond_option *opt,
int error, const struct bond_opt_value *val)
{
const struct bond_opt_value *minval, *maxval;
char *p;
switch (error) {
case -EINVAL:
if (val) {
if (val->string) {
/* sometimes RAWVAL opts may have new lines */
p = strchr(val->string, '\n');
if (p)
*p = '\0';
netdev_err(bond->dev, "option %s: invalid value (%s)\n",
opt->name, val->string);
} else {
netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
opt->name, val->value);
}
}
minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
if (!maxval)
break;
netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
opt->name, minval ? minval->value : 0, maxval->value);
break;
case -EACCES:
bond_opt_dep_print(bond, opt);
break;
case -ENOTEMPTY:
netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
opt->name);
break;
case -EBUSY:
netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
opt->name);
break;
default:
break;
}
}
/**
* __bond_opt_set - set a bonding option
* @bond: target bond device
* @option: option to set
* @val: value to set it to
*
* This function is used to change the bond's option value, it can be
* used for both enabling/changing an option and for disabling it. RTNL lock
* must be obtained before calling this function.
*/
int __bond_opt_set(struct bonding *bond,
unsigned int option, struct bond_opt_value *val)
{
const struct bond_opt_value *retval = NULL;
const struct bond_option *opt;
int ret = -ENOENT;
ASSERT_RTNL();
opt = bond_opt_get(option);
if (WARN_ON(!val) || WARN_ON(!opt))
goto out;
ret = bond_opt_check_deps(bond, opt);
if (ret)
goto out;
retval = bond_opt_parse(opt, val);
if (!retval) {
ret = -EINVAL;
goto out;
}
ret = opt->set(bond, retval);
out:
if (ret)
bond_opt_error_interpret(bond, opt, ret, val);
return ret;
}
/**
* __bond_opt_set_notify - set a bonding option
* @bond: target bond device
* @option: option to set
* @val: value to set it to
*
* This function is used to change the bond's option value and trigger
* a notification to user sapce. It can be used for both enabling/changing
* an option and for disabling it. RTNL lock must be obtained before calling
* this function.
*/
int __bond_opt_set_notify(struct bonding *bond,
unsigned int option, struct bond_opt_value *val)
{
int ret = -ENOENT;
ASSERT_RTNL();
ret = __bond_opt_set(bond, option, val);
if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
return ret;
}
/**
* bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
* @bond: target bond device
* @option: option to set
* @buf: value to set it to
*
* This function tries to acquire RTNL without blocking and if successful
* calls __bond_opt_set. It is mainly used for sysfs option manipulation.
*/
int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
{
struct bond_opt_value optval;
int ret;
if (!rtnl_trylock())
return restart_syscall();
bond_opt_initstr(&optval, buf);
ret = __bond_opt_set_notify(bond, option, &optval);
rtnl_unlock();
return ret;
}
/**
* bond_opt_get - get a pointer to an option
* @option: option for which to return a pointer
*
* This function checks if option is valid and if so returns a pointer
* to its entry in the bond_opts[] option array.
*/
const struct bond_option *bond_opt_get(unsigned int option)
{
if (!BOND_OPT_VALID(option))
return NULL;
return &bond_opts[option];
}
static int bond_option_mode_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
newval->string);
/* disable arp monitoring */
bond->params.arp_interval = 0;
/* set miimon to default value */
bond->params.miimon = BOND_DEFAULT_MIIMON;
netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
bond->params.miimon);
}
if (newval->value == BOND_MODE_ALB)
bond->params.tlb_dynamic_lb = 1;
/* don't cache arp_validate between modes */
bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
bond->params.mode = newval->value;
return 0;
}
static int bond_option_active_slave_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
char ifname[IFNAMSIZ] = { 0, };
struct net_device *slave_dev;
int ret = 0;
sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
if (!strlen(ifname) || newval->string[0] == '\n') {
slave_dev = NULL;
} else {
slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
if (!slave_dev)
return -ENODEV;
}
if (slave_dev) {
if (!netif_is_bond_slave(slave_dev)) {
netdev_err(bond->dev, "Device %s is not bonding slave\n",
slave_dev->name);
return -EINVAL;
}
if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
netdev_err(bond->dev, "Device %s is not our slave\n",
slave_dev->name);
return -EINVAL;
}
}
block_netpoll_tx();
/* check to see if we are clearing active */
if (!slave_dev) {
netdev_dbg(bond->dev, "Clearing current active slave\n");
RCU_INIT_POINTER(bond->curr_active_slave, NULL);
bond_select_active_slave(bond);
} else {
struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
struct slave *new_active = bond_slave_get_rtnl(slave_dev);
BUG_ON(!new_active);
if (new_active == old_active) {
/* do nothing */
netdev_dbg(bond->dev, "%s is already the current active slave\n",
new_active->dev->name);
} else {
if (old_active && (new_active->link == BOND_LINK_UP) &&
bond_slave_is_up(new_active)) {
netdev_dbg(bond->dev, "Setting %s as active slave\n",
new_active->dev->name);
bond_change_active_slave(bond, new_active);
} else {
netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
new_active->dev->name,
new_active->dev->name);
ret = -EINVAL;
}
}
}
unblock_netpoll_tx();
return ret;
}
/* There are two tricky bits here. First, if MII monitoring is activated, then
* we must disable ARP monitoring. Second, if the timer isn't running, we must
* start it.
*/
static int bond_option_miimon_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
newval->value);
bond->params.miimon = newval->value;
if (bond->params.updelay)
netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
bond->params.updelay * bond->params.miimon);
if (bond->params.downdelay)
netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
bond->params.downdelay * bond->params.miimon);
if (newval->value && bond->params.arp_interval) {
netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
bond->params.arp_interval = 0;
if (bond->params.arp_validate)
bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
}
if (bond->dev->flags & IFF_UP) {
/* If the interface is up, we may need to fire off
* the MII timer. If the interface is down, the
* timer will get fired off when the open function
* is called.
*/
if (!newval->value) {
cancel_delayed_work_sync(&bond->mii_work);
} else {
cancel_delayed_work_sync(&bond->arp_work);
queue_delayed_work(bond->wq, &bond->mii_work, 0);
}
}
return 0;
}
/* Set up and down delays. These must be multiples of the
* MII monitoring value, and are stored internally as the multiplier.
* Thus, we must translate to MS for the real world.
*/
static int bond_option_updelay_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
int value = newval->value;
if (!bond->params.miimon) {
netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
return -EPERM;
}
if ((value % bond->params.miimon) != 0) {
netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
value, bond->params.miimon,
(value / bond->params.miimon) *
bond->params.miimon);
}
bond->params.updelay = value / bond->params.miimon;
netdev_dbg(bond->dev, "Setting up delay to %d\n",
bond->params.updelay * bond->params.miimon);
return 0;
}
static int bond_option_downdelay_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
int value = newval->value;
if (!bond->params.miimon) {
netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
return -EPERM;
}
if ((value % bond->params.miimon) != 0) {
netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
value, bond->params.miimon,
(value / bond->params.miimon) *
bond->params.miimon);
}
bond->params.downdelay = value / bond->params.miimon;
netdev_dbg(bond->dev, "Setting down delay to %d\n",
bond->params.downdelay * bond->params.miimon);
return 0;
}
static int bond_option_use_carrier_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
newval->value);
bond->params.use_carrier = newval->value;
return 0;
}
/* There are two tricky bits here. First, if ARP monitoring is activated, then
* we must disable MII monitoring. Second, if the ARP timer isn't running,
* we must start it.
*/
static int bond_option_arp_interval_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
newval->value);
bond->params.arp_interval = newval->value;
if (newval->value) {
if (bond->params.miimon) {
netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
bond->params.miimon = 0;
}
if (!bond->params.arp_targets[0])
netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
}
if (bond->dev->flags & IFF_UP) {
/* If the interface is up, we may need to fire off
* the ARP timer. If the interface is down, the
* timer will get fired off when the open function
* is called.
*/
if (!newval->value) {
if (bond->params.arp_validate)
bond->recv_probe = NULL;
cancel_delayed_work_sync(&bond->arp_work);
} else {
/* arp_validate can be set only in active-backup mode */
bond->recv_probe = bond_arp_rcv;
cancel_delayed_work_sync(&bond->mii_work);
queue_delayed_work(bond->wq, &bond->arp_work, 0);
}
}
return 0;
}
static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
__be32 target,
unsigned long last_rx)
{
__be32 *targets = bond->params.arp_targets;
struct list_head *iter;
struct slave *slave;
if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
bond_for_each_slave(bond, slave, iter)
slave->target_last_arp_rx[slot] = last_rx;
targets[slot] = target;
}
}
static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
{
__be32 *targets = bond->params.arp_targets;
int ind;
if (!bond_is_ip_target_ok(target)) {
netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
&target);
return -EINVAL;
}
if (bond_get_targets_ip(targets, target) != -1) { /* dup */
netdev_err(bond->dev, "ARP target %pI4 is already present\n",
&target);
return -EINVAL;
}
ind = bond_get_targets_ip(targets, 0); /* first free slot */
if (ind == -1) {
netdev_err(bond->dev, "ARP target table is full!\n");
return -EINVAL;
}
netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
_bond_options_arp_ip_target_set(bond, ind, target, jiffies);
return 0;
}
static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
{
return _bond_option_arp_ip_target_add(bond, target);
}
static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
{
__be32 *targets = bond->params.arp_targets;
struct list_head *iter;
struct slave *slave;
unsigned long *targets_rx;
int ind, i;
if (!bond_is_ip_target_ok(target)) {
netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
&target);
return -EINVAL;
}
ind = bond_get_targets_ip(targets, target);
if (ind == -1) {
netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
&target);
return -EINVAL;
}
if (ind == 0 && !targets[1] && bond->params.arp_interval)
netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
bond_for_each_slave(bond, slave, iter) {
targets_rx = slave->target_last_arp_rx;
for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets_rx[i] = targets_rx[i+1];
targets_rx[i] = 0;
}
for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
targets[i] = targets[i+1];
targets[i] = 0;
return 0;
}
void bond_option_arp_ip_targets_clear(struct bonding *bond)
{
int i;
for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
_bond_options_arp_ip_target_set(bond, i, 0, 0);
}
static int bond_option_arp_ip_targets_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
int ret = -EPERM;
__be32 target;
if (newval->string) {
if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
&target);
return ret;
}
if (newval->string[0] == '+')
ret = bond_option_arp_ip_target_add(bond, target);
else if (newval->string[0] == '-')
ret = bond_option_arp_ip_target_rem(bond, target);
else
netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
} else {
target = newval->value;
ret = bond_option_arp_ip_target_add(bond, target);
}
return ret;
}
static int bond_option_arp_validate_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
newval->string, newval->value);
if (bond->dev->flags & IFF_UP) {
if (!newval->value)
bond->recv_probe = NULL;
else if (bond->params.arp_interval)
bond->recv_probe = bond_arp_rcv;
}
bond->params.arp_validate = newval->value;
return 0;
}
static int bond_option_arp_all_targets_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
newval->string, newval->value);
bond->params.arp_all_targets = newval->value;
return 0;
}
static int bond_option_primary_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
char *p, *primary = newval->string;
struct list_head *iter;
struct slave *slave;
block_netpoll_tx();
p = strchr(primary, '\n');
if (p)
*p = '\0';
/* check to see if we are clearing primary */
if (!strlen(primary)) {
netdev_dbg(bond->dev, "Setting primary slave to None\n");
RCU_INIT_POINTER(bond->primary_slave, NULL);
memset(bond->params.primary, 0, sizeof(bond->params.primary));
bond_select_active_slave(bond);
goto out;
}
bond_for_each_slave(bond, slave, iter) {
if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
netdev_dbg(bond->dev, "Setting %s as primary slave\n",
slave->dev->name);
rcu_assign_pointer(bond->primary_slave, slave);
strcpy(bond->params.primary, slave->dev->name);
bond_select_active_slave(bond);
goto out;
}
}
if (rtnl_dereference(bond->primary_slave)) {
netdev_dbg(bond->dev, "Setting primary slave to None\n");
RCU_INIT_POINTER(bond->primary_slave, NULL);
bond_select_active_slave(bond);
}
strncpy(bond->params.primary, primary, IFNAMSIZ);
bond->params.primary[IFNAMSIZ - 1] = 0;
netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
primary, bond->dev->name);
out:
unblock_netpoll_tx();
return 0;
}
static int bond_option_primary_reselect_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
newval->string, newval->value);
bond->params.primary_reselect = newval->value;
block_netpoll_tx();
bond_select_active_slave(bond);
unblock_netpoll_tx();
return 0;
}
static int bond_option_fail_over_mac_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
newval->string, newval->value);
bond->params.fail_over_mac = newval->value;
return 0;
}
static int bond_option_xmit_hash_policy_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
newval->string, newval->value);
bond->params.xmit_policy = newval->value;
return 0;
}
static int bond_option_resend_igmp_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
newval->value);
bond->params.resend_igmp = newval->value;
return 0;
}
static int bond_option_num_peer_notif_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
bond->params.num_peer_notif = newval->value;
return 0;
}
static int bond_option_all_slaves_active_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
struct list_head *iter;
struct slave *slave;
if (newval->value == bond->params.all_slaves_active)
return 0;
bond->params.all_slaves_active = newval->value;
bond_for_each_slave(bond, slave, iter) {
if (!bond_is_active_slave(slave)) {
if (newval->value)
slave->inactive = 0;
else
slave->inactive = 1;
}
}
return 0;
}
static int bond_option_min_links_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting min links value to %llu\n",
newval->value);
bond->params.min_links = newval->value;
bond_set_carrier(bond);
return 0;
}
static int bond_option_lp_interval_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
bond->params.lp_interval = newval->value;
return 0;
}
static int bond_option_pps_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
newval->value);
bond->params.packets_per_slave = newval->value;
if (newval->value > 0) {
bond->params.reciprocal_packets_per_slave =
reciprocal_value(newval->value);
} else {
/* reciprocal_packets_per_slave is unused if
* packets_per_slave is 0 or 1, just initialize it
*/
bond->params.reciprocal_packets_per_slave =
(struct reciprocal_value) { 0 };
}
return 0;
}
static int bond_option_lacp_rate_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
newval->string, newval->value);
bond->params.lacp_fast = newval->value;
bond_3ad_update_lacp_rate(bond);
return 0;
}
static int bond_option_ad_select_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
newval->string, newval->value);
bond->params.ad_select = newval->value;
return 0;
}
static int bond_option_queue_id_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
struct slave *slave, *update_slave;
struct net_device *sdev;
struct list_head *iter;
char *delim;
int ret = 0;
u16 qid;
/* delim will point to queue id if successful */
delim = strchr(newval->string, ':');
if (!delim)
goto err_no_cmd;
/* Terminate string that points to device name and bump it
* up one, so we can read the queue id there.
*/
*delim = '\0';
if (sscanf(++delim, "%hd\n", &qid) != 1)
goto err_no_cmd;
/* Check buffer length, valid ifname and queue id */
if (!dev_valid_name(newval->string) ||
qid > bond->dev->real_num_tx_queues)
goto err_no_cmd;
/* Get the pointer to that interface if it exists */
sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
if (!sdev)
goto err_no_cmd;
/* Search for thes slave and check for duplicate qids */
update_slave = NULL;
bond_for_each_slave(bond, slave, iter) {
if (sdev == slave->dev)
/* We don't need to check the matching
* slave for dups, since we're overwriting it
*/
update_slave = slave;
else if (qid && qid == slave->queue_id) {
goto err_no_cmd;
}
}
if (!update_slave)
goto err_no_cmd;
/* Actually set the qids for the slave */
update_slave->queue_id = qid;
out:
return ret;
err_no_cmd:
netdev_dbg(bond->dev, "invalid input for queue_id set\n");
ret = -EPERM;
goto out;
}
static int bond_option_slaves_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
char command[IFNAMSIZ + 1] = { 0, };
struct net_device *dev;
char *ifname;
int ret;
sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
ifname = command + 1;
if ((strlen(command) <= 1) ||
!dev_valid_name(ifname))
goto err_no_cmd;
dev = __dev_get_by_name(dev_net(bond->dev), ifname);
if (!dev) {
netdev_dbg(bond->dev, "interface %s does not exist!\n",
ifname);
ret = -ENODEV;
goto out;
}
switch (command[0]) {
case '+':
netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
ret = bond_enslave(bond->dev, dev, NULL);
break;
case '-':
netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
ret = bond_release(bond->dev, dev);
break;
default:
goto err_no_cmd;
}
out:
return ret;
err_no_cmd:
netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
ret = -EPERM;
goto out;
}
static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
newval->string, newval->value);
bond->params.tlb_dynamic_lb = newval->value;
return 0;
}
static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
newval->value);
bond->params.ad_actor_sys_prio = newval->value;
bond_3ad_update_ad_actor_settings(bond);
return 0;
}
static int bond_option_ad_actor_system_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
u8 macaddr[ETH_ALEN];
u8 *mac;
int i;
if (newval->string) {
i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&macaddr[0], &macaddr[1], &macaddr[2],
&macaddr[3], &macaddr[4], &macaddr[5]);
if (i != ETH_ALEN)
goto err;
mac = macaddr;
} else {
mac = (u8 *)&newval->value;
}
if (!is_valid_ether_addr(mac))
goto err;
netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
ether_addr_copy(bond->params.ad_actor_system, mac);
bond_3ad_update_ad_actor_settings(bond);
return 0;
err:
netdev_err(bond->dev, "Invalid MAC address.\n");
return -EINVAL;
}
static int bond_option_ad_user_port_key_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
newval->value);
bond->params.ad_user_port_key = newval->value;
return 0;
}
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