[PATCH AUTOSEL 4.19 18/52] bonding: show full hw address in sysfs for slave entries

Sasha Levin
2019-04-24T14:39:59Z

From: Konstantin Khorenko <khorenko@virtuozzo.com>

[ Upstream commit 18bebc6dd3281955240062655a4df35eef2c46b3 ]

Bond expects ethernet hwaddr for its slave, but it can be longer than 6
bytes - infiniband interface for example.

# cat /sys/devices/<skipped>/net/ib0/address
80:00:02:08:fe:80:00:00:00:00:00:00:7c:fe:90:03:00:be:5d:e1

# cat /sys/devices/<skipped>/net/ib0/bonding_slave/perm_hwaddr
80:00:02:08:fe:80

So print full hwaddr in sysfs "bonding_slave/perm_hwaddr" as well.

Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/bonding/bond_sysfs_slave.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_sysfs_slave.c b/drivers/net/bonding/bond_sysfs_slave.c
index 2f120b2ffef0..4985268e2273 100644
--- a/drivers/net/bonding/bond_sysfs_slave.c
+++ b/drivers/net/bonding/bond_sysfs_slave.c
@@ -55,7 +55,9 @@ static SLAVE_ATTR_RO(link_failure_count);

static ssize_t perm_hwaddr_show(struct slave *slave, char *buf)
{
- return sprintf(buf, "%pM\n", slave->perm_hwaddr);
+ return sprintf(buf, "%*phC\n",
+ slave->dev->addr_len,
+ slave->perm_hwaddr);
}
static SLAVE_ATTR_RO(perm_hwaddr);

--
2.19.1