diff options
Diffstat (limited to 'drivers/net/bonding/bond_options.c')
| -rw-r--r-- | drivers/net/bonding/bond_options.c | 1351 |
1 files changed, 1351 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c new file mode 100644 index 000000000..e8d3c1d35 --- /dev/null +++ b/drivers/net/bonding/bond_options.c @@ -0,0 +1,1351 @@ +/* + * 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 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_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, + } +}; + +/* 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 struct net_device *__bond_option_active_slave_get(struct bonding *bond, + struct slave *slave) +{ + return bond_uses_primary(bond) && slave ? slave->dev : NULL; +} + +struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) +{ + struct slave *slave = rcu_dereference(bond->curr_active_slave); + + return __bond_option_active_slave_get(bond, slave); +} + +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; +} |