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Date: Fri, 06 Feb 2015 17:20:23 -0800
From: Jay Vosburgh <jay.vosburgh@...onical.com>
To: Mahesh Bandewar <maheshb@...gle.com>
cc: Andy Gospodarek <andy@...yhouse.net>,
Veaceslav Falico <vfalico@...il.com>,
Nikolay Aleksandrov <nikolay@...hat.com>,
David Miller <davem@...emloft.net>,
netdev <netdev@...r.kernel.org>,
Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH next 5/6] bonding: Allow userspace to set macaddr on bonding-dev
Mahesh Bandewar <maheshb@...gle.com> wrote:
>This patch allows user-space to set the mac-address on the bonding device.
>This mac-address can not be NULL or a Multicast. If the mac-address is set
>from user-space; kernel will honor it and will not overwrite it. In the
>absense (value from user space); the logic will default to using the
>masters' mac as the mac address for the bonding device.
>
>It can be set using example code below -
>
> # modprobe bonding mode=4
> # sys_mac_addr=$(printf '%02x:%02x:%02x:%02x:%02x:%02x' \
> $(( (RANDOM & 0xFE) | 0x02 )) \
> $(( RANDOM & 0xFF )) \
> $(( RANDOM & 0xFF )) \
> $(( RANDOM & 0xFF )) \
> $(( RANDOM & 0xFF )) \
> $(( RANDOM & 0xFF )))
> # echo $sys_mac_addr > /sys/class/net/bond0/bonding/ad_actor_system_mac_address
> # echo +eth1 > /sys/class/net/bond0/bonding/slaves
> ...
> # ip link set bond0 up
How is this patch functionally different from setting the
bonding master's MAC address to a particular value prior to adding any
slaves?
-J
>Signed-off-by: Mahesh Bandewar <maheshb@...gle.com>
>---
> drivers/net/bonding/bond_3ad.c | 7 ++++++-
> drivers/net/bonding/bond_main.c | 1 +
> drivers/net/bonding/bond_options.c | 29 +++++++++++++++++++++++++++++
> drivers/net/bonding/bond_procfs.c | 6 ++++++
> drivers/net/bonding/bond_sysfs.c | 16 ++++++++++++++++
> include/net/bond_options.h | 1 +
> include/net/bonding.h | 1 +
> 7 files changed, 60 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
>index 1177f96194dd..373d3db3809f 100644
>--- a/drivers/net/bonding/bond_3ad.c
>+++ b/drivers/net/bonding/bond_3ad.c
>@@ -1914,7 +1914,12 @@ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
>
> BOND_AD_INFO(bond).system.sys_priority =
> bond->params.ad_actor_sysprio;
>- BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
>+ if (is_zero_ether_addr(bond->params.ad_actor_sys_macaddr))
>+ BOND_AD_INFO(bond).system.sys_mac_addr =
>+ *((struct mac_addr *)bond->dev->dev_addr);
>+ else
>+ BOND_AD_INFO(bond).system.sys_mac_addr =
>+ *((struct mac_addr *)bond->params.ad_actor_sys_macaddr);
>
> /* initialize how many times this module is called in one
> * second (should be about every 100ms)
>diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>index 561b2bde5aeb..1a6735ef2ea7 100644
>--- a/drivers/net/bonding/bond_main.c
>+++ b/drivers/net/bonding/bond_main.c
>@@ -4440,6 +4440,7 @@ static int bond_check_params(struct bond_params *params)
> params->packets_per_slave = packets_per_slave;
> params->tlb_dynamic_lb = 1; /* Default value */
> params->ad_actor_sysprio = ad_actor_sysprio;
>+ eth_zero_addr(params->ad_actor_sys_macaddr);
> if (packets_per_slave > 0) {
> params->reciprocal_packets_per_slave =
> reciprocal_value(packets_per_slave);
>diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
>index d8f6760143ae..330d48b6a1e6 100644
>--- a/drivers/net/bonding/bond_options.c
>+++ b/drivers/net/bonding/bond_options.c
>@@ -72,6 +72,8 @@ static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
> const struct bond_opt_value *newval);
> static int bond_option_ad_actor_sysprio_set(struct bonding *bond,
> const struct bond_opt_value *newval);
>+static int bond_option_ad_actor_sys_macaddr_set(struct bonding *bond,
>+ const struct bond_opt_value *newval);
>
>
> static const struct bond_opt_value bond_mode_tbl[] = {
>@@ -396,6 +398,13 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = {
> .values = bond_ad_actor_sysprio_tbl,
> .set = bond_option_ad_actor_sysprio_set,
> },
>+ [BOND_OPT_AD_ACTOR_SYS_MACADDR] = {
>+ .id = BOND_OPT_AD_ACTOR_SYS_MACADDR,
>+ .name = "ad_actor_system_mac_address",
>+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
>+ .flags = BOND_OPTFLAG_RAWVAL | BOND_OPTFLAG_IFDOWN,
>+ .set = bond_option_ad_actor_sys_macaddr_set,
>+ },
> };
>
> /* Searches for an option by name */
>@@ -1376,3 +1385,23 @@ static int bond_option_ad_actor_sysprio_set(struct bonding *bond,
> bond->params.ad_actor_sysprio = newval->value;
> return 0;
> }
>+
>+static int bond_option_ad_actor_sys_macaddr_set(struct bonding *bond,
>+ const struct bond_opt_value *newval)
>+{
>+ u8 macaddr[ETH_ALEN];
>+ int i;
>+
>+ 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 || !is_valid_ether_addr(macaddr)) {
>+ netdev_err(bond->dev, "Invalid MAC address.\n");
>+ return -EINVAL;
>+ }
>+
>+ ether_addr_copy(bond->params.ad_actor_sys_macaddr, macaddr);
>+
>+ return 0;
>+}
>diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
>index 9e33c48886ef..81452ced852f 100644
>--- a/drivers/net/bonding/bond_procfs.c
>+++ b/drivers/net/bonding/bond_procfs.c
>@@ -136,6 +136,8 @@ static void bond_info_show_master(struct seq_file *seq)
> optval->string);
> seq_printf(seq, "System priority: %d\n",
> BOND_AD_INFO(bond).system.sys_priority);
>+ seq_printf(seq, "System MAC address: %pM\n",
>+ &BOND_AD_INFO(bond).system.sys_mac_addr);
>
> if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
> seq_printf(seq, "bond %s has no active aggregator\n",
>@@ -198,6 +200,8 @@ static void bond_info_show_slave(struct seq_file *seq,
> seq_puts(seq, "details actor lacp pdu:\n");
> seq_printf(seq, " system priority: %d\n",
> port->actor_system_priority);
>+ seq_printf(seq, " system mac address: %pM\n",
>+ &port->actor_system);
> seq_printf(seq, " port key: %d\n",
> port->actor_oper_port_key);
> seq_printf(seq, " port priority: %d\n",
>@@ -210,6 +214,8 @@ static void bond_info_show_slave(struct seq_file *seq,
> seq_puts(seq, "details partner lacp pdu:\n");
> seq_printf(seq, " system priority: %d\n",
> port->partner_oper.system_priority);
>+ seq_printf(seq, " system mac address: %pM\n",
>+ &port->partner_oper.system);
> seq_printf(seq, " oper key: %d\n",
> port->partner_oper.key);
> seq_printf(seq, " port priority: %d\n",
>diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
>index 4350aa06f867..91713d0b6685 100644
>--- a/drivers/net/bonding/bond_sysfs.c
>+++ b/drivers/net/bonding/bond_sysfs.c
>@@ -706,6 +706,21 @@ static ssize_t bonding_show_ad_actor_sysprio(struct device *d,
> static DEVICE_ATTR(ad_actor_system_priority, S_IRUGO | S_IWUSR,
> bonding_show_ad_actor_sysprio, bonding_sysfs_store_option);
>
>+static ssize_t bonding_show_ad_actor_sys_macaddr(struct device *d,
>+ struct device_attribute *attr,
>+ char *buf)
>+{
>+ struct bonding *bond = to_bond(d);
>+
>+ if (BOND_MODE(bond) == BOND_MODE_8023AD)
>+ return sprintf(buf, "%pM\n", bond->params.ad_actor_sys_macaddr);
>+
>+ return 0;
>+}
>+static DEVICE_ATTR(ad_actor_system_mac_address, S_IRUGO | S_IWUSR,
>+ bonding_show_ad_actor_sys_macaddr,
>+ bonding_sysfs_store_option);
>+
> static struct attribute *per_bond_attrs[] = {
> &dev_attr_slaves.attr,
> &dev_attr_mode.attr,
>@@ -740,6 +755,7 @@ static struct attribute *per_bond_attrs[] = {
> &dev_attr_packets_per_slave.attr,
> &dev_attr_tlb_dynamic_lb.attr,
> &dev_attr_ad_actor_system_priority.attr,
>+ &dev_attr_ad_actor_system_mac_address.attr,
> NULL,
> };
>
>diff --git a/include/net/bond_options.h b/include/net/bond_options.h
>index c2af1db37354..993ef73cd050 100644
>--- a/include/net/bond_options.h
>+++ b/include/net/bond_options.h
>@@ -64,6 +64,7 @@ enum {
> BOND_OPT_SLAVES,
> BOND_OPT_TLB_DYNAMIC_LB,
> BOND_OPT_AD_ACTOR_SYSPRIO,
>+ BOND_OPT_AD_ACTOR_SYS_MACADDR,
> BOND_OPT_LAST
> };
>
>diff --git a/include/net/bonding.h b/include/net/bonding.h
>index 7a5c79fcf866..cd2092e6bc71 100644
>--- a/include/net/bonding.h
>+++ b/include/net/bonding.h
>@@ -144,6 +144,7 @@ struct bond_params {
> int tlb_dynamic_lb;
> struct reciprocal_value reciprocal_packets_per_slave;
> u16 ad_actor_sysprio;
>+ u8 ad_actor_sys_macaddr[ETH_ALEN];
> };
>
> struct bond_parm_tbl {
>--
>2.2.0.rc0.207.ga3a616c
>
---
-Jay Vosburgh, jay.vosburgh@...onical.com
--
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