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| author |   Jiri Pirko <jiri@mellanox.com> | 2019-04-03 14:24:17 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-04-04 17:42:36 -0700 |
| commit | 7e1146e8c10c00f859843817da8ecc5d902ea409 (patch) | |
| tree | 822a020b5a501b08faa86b25488bc07c46af7db7 /net/core | |
| parent | net: devlink: extend port attrs for switch ID (diff) | |
| download | linux-dev-7e1146e8c10c00f859843817da8ecc5d902ea409.tar.xz linux-dev-7e1146e8c10c00f859843817da8ecc5d902ea409.zip | |
net: devlink: introduce devlink_compat_switch_id_get() helper
Introduce devlink_compat_switch_id_get() helper which fills up switch_id
according to passed netdev pointer. Call it directly from
dev_get_port_parent_id() as a fallback when ndo_get_port_parent_id
is not defined for given netdev.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 15 | ||||
| -rw-r--r-- | net/core/devlink.c | 19 |
2 files changed, 30 insertions, 4 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 79e0c26988b8..a95782764360 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7900,13 +7900,20 @@ int dev_get_port_parent_id(struct net_device *dev, struct netdev_phys_item_id first = { }; struct net_device *lower_dev; struct list_head *iter; - int err = -EOPNOTSUPP; + int err; + + if (ops->ndo_get_port_parent_id) { + err = ops->ndo_get_port_parent_id(dev, ppid); + if (err != -EOPNOTSUPP) + return err; + } - if (ops->ndo_get_port_parent_id) - return ops->ndo_get_port_parent_id(dev, ppid); + err = devlink_compat_switch_id_get(dev, ppid); + if (!err || err != -EOPNOTSUPP) + return err; if (!recurse) - return err; + return -EOPNOTSUPP; netdev_for_each_lower_dev(dev, lower_dev, iter) { err = dev_get_port_parent_id(lower_dev, ppid, recurse); diff --git a/net/core/devlink.c b/net/core/devlink.c index 5b2eb186bb92..d9fbf94ea2a3 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -6508,6 +6508,25 @@ int devlink_compat_phys_port_name_get(struct net_device *dev, return __devlink_port_phys_port_name_get(devlink_port, name, len); } +int devlink_compat_switch_id_get(struct net_device *dev, + struct netdev_phys_item_id *ppid) +{ + struct devlink_port *devlink_port; + + /* RTNL mutex is held here which ensures that devlink_port + * instance cannot disappear in the middle. No need to take + * any devlink lock as only permanent values are accessed. + */ + ASSERT_RTNL(); + devlink_port = netdev_to_devlink_port(dev); + if (!devlink_port || !devlink_port->attrs.switch_port) + return -EOPNOTSUPP; + + memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); + + return 0; +} + static int __init devlink_init(void) { return genl_register_family(&devlink_nl_family); |