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net: dsa: Rename IFLA_DSA_MASTER to IFLA_DSA_CONDUIT

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This preserves the existing IFLA_DSA_MASTER which is part of the uAPI
and creates an alias named IFLA_DSA_CONDUIT.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20231023181729.1191071-3-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Fainelli 2023-10-23 11:17:29 -07:00 committed by Jakub Kicinski
parent 6ca80638b9
commit 87cd83714f
3 changed files with 10 additions and 8 deletions
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4
Documentation/networking/dsa/configuration.rst
View File

@ -393,7 +393,7 @@ description which has an ``ethernet`` property. It is up to the user to
configure the system for the switch to use other conduits.
DSA uses the ``rtnl_link_ops`` mechanism (with a "dsa" ``kind``) to allow
changing the DSA conduit of a user port. The ``IFLA_DSA_MASTER`` u32 netlink
changing the DSA conduit of a user port. The ``IFLA_DSA_CONDUIT`` u32 netlink
attribute contains the ifindex of the conduit device that handles each user
device. The DSA conduit must be a valid candidate based on firmware node
information, or a LAG interface which contains only slaves which are valid
@ -435,7 +435,7 @@ Using iproute2, the following manipulations are possible:
dsa master bond0
Notice that in the case of CPU ports under a LAG, the use of the
``IFLA_DSA_MASTER`` netlink attribute is not strictly needed, but rather, DSA
``IFLA_DSA_CONDUIT`` netlink attribute is not strictly needed, but rather, DSA
reacts to the ``IFLA_MASTER`` attribute change of its present conduit (``eth0``)
and migrates all user ports to the new upper of ``eth0``, ``bond0``. Similarly,
when ``bond0`` is destroyed using ``RTM_DELLINK``, DSA migrates the user ports

4
include/uapi/linux/if_link.h
View File

@ -1394,7 +1394,9 @@ enum {
enum {
IFLA_DSA_UNSPEC,
IFLA_DSA_MASTER,
IFLA_DSA_CONDUIT,
/* Deprecated, use IFLA_DSA_CONDUIT instead */
IFLA_DSA_MASTER = IFLA_DSA_CONDUIT,
__IFLA_DSA_MAX,
};

10
net/dsa/netlink.c
View File

@ -8,7 +8,7 @@
#include "user.h"
static const struct nla_policy dsa_policy[IFLA_DSA_MAX + 1] = {
[IFLA_DSA_MASTER] = { .type = NLA_U32 },
[IFLA_DSA_CONDUIT] = { .type = NLA_U32 },
};
static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
@ -20,8 +20,8 @@ static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
if (!data)
return 0;
if (data[IFLA_DSA_MASTER]) {
u32 ifindex = nla_get_u32(data[IFLA_DSA_MASTER]);
if (data[IFLA_DSA_CONDUIT]) {
u32 ifindex = nla_get_u32(data[IFLA_DSA_CONDUIT]);
struct net_device *conduit;
conduit = __dev_get_by_index(dev_net(dev), ifindex);
@ -38,7 +38,7 @@ static int dsa_changelink(struct net_device *dev, struct nlattr *tb[],
static size_t dsa_get_size(const struct net_device *dev)
{
return nla_total_size(sizeof(u32)) + /* IFLA_DSA_MASTER */
return nla_total_size(sizeof(u32)) + /* IFLA_DSA_CONDUIT */
0;
}
@ -46,7 +46,7 @@ static int dsa_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct net_device *conduit = dsa_user_to_conduit(dev);
if (nla_put_u32(skb, IFLA_DSA_MASTER, conduit->ifindex))
if (nla_put_u32(skb, IFLA_DSA_CONDUIT, conduit->ifindex))
return -EMSGSIZE;
return 0;