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RDMA/netdev: Use priv_destructor for netdev cleanup

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Now that the unregister_netdev flow for IPoIB no longer relies on external
code we can now introduce the use of priv_destructor and
needs_free_netdev.

The rdma_netdev flow is switched to use the netdev common priv_destructor
instead of the special free_rdma_netdev and the IPOIB ULP adjusted:
 - priv_destructor needs to switch to point to the ULP's destructor
   which will then call the rdma_ndev's in the right order
 - We need to be careful around the error unwind of register_netdev
   as it sometimes calls priv_destructor on failure
 - ULPs need to use ndo_init/uninit to ensure proper ordering
   of failures around register_netdev

Switching to priv_destructor is a necessary pre-requisite to using
the rtnl new_link mechanism.

The VNIC user for rdma_netdev should also be revised, but that is left for
another patch.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Denis Drozdov <denisd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
This commit is contained in:
Jason Gunthorpe
2018-07-29 11:34:56 +03:00
parent eaeb398425
commit 9f49a5b5c2
7 changed files with 129 additions and 98 deletions
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3
include/linux/mlx5/driver.h
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@@ -1218,14 +1218,11 @@ struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline void mlx5_rdma_netdev_free(struct net_device *netdev) {}
#else
struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
struct ib_device *ibdev,
const char *name,
void (*setup)(struct net_device *));
void mlx5_rdma_netdev_free(struct net_device *netdev);
#endif /* CONFIG_MLX5_CORE_IPOIB */
struct mlx5_profile {