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alistair23-linux/drivers/net/bonding/bond_options.c
Nikolay Aleksandrov 7f20cd2521 bonding: 3ad: allow to set ad_actor settings while the bond is up 
No need to require the bond down while changing these settings, the change
will be reflected immediately and the 3ad mode will sort itself out.
For faster convergence set port->ntt to true in order to generate new
LACPDUs immediately.

CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-02-11 04:31:11 -05:00

1440 lines
41 KiB
C
Raw Blame History

/*
* 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 <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);
else if (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(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_info(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_info(bond->dev, "Setting MII monitoring interval to %d\n",
bond->params.miimon);
}
/* 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_info(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_info(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_info(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_info(bond->dev, "Setting MII monitoring interval to %llu\n",
newval->value);
bond->params.miimon = newval->value;
if (bond->params.updelay)
netdev_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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_info(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)
{
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_info(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_info(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_info(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_info(bond->dev, "interface %s does not exist!\n",
ifname);
ret = -ENODEV;
goto out;
}
switch (command[0]) {
case '+':
netdev_info(bond->dev, "Adding slave %s\n", dev->name);
ret = bond_enslave(bond->dev, dev);
break;
case '-':
netdev_info(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_info(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_info(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_info(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_info(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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