From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denis Drozdov Subject: [PATCH net 1/2] rtnl: device allocation/free via rtnl_link_ops Date: Sun, 31 Dec 2017 13:16:22 +0200 Message-ID: <1514718983-466-2-git-send-email-denisd@mellanox.com> References: <1514718983-466-1-git-send-email-denisd@mellanox.com> Return-path: In-Reply-To: <1514718983-466-1-git-send-email-denisd-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org Cc: jgg-uk2M96/98Pc@public.gmane.org, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Denis Drozdov List-Id: linux-rdma@vger.kernel.org Introduced new rtnl_link_ops callbacks: alloc_link() to allocate multi-queue netdev and free_link() to release the netdevice. free_link() appoints to free_netdev by default and could be reassigned. These calls should be used by IB ULP code to allocate and release both enhanced and non-enhanced IB drivers and aren't necessary by the regular drivers. Fixes: cd565b4b51e5 ("IB/IPoIB: Support acceleration options callbacks") Reviewed-by: Erez Shitrit Reviewed-by: Saeed Mahameed Signed-off-by: Denis Drozdov --- include/net/rtnetlink.h | 4 ++++ net/core/dev.c | 2 ++ net/core/rtnetlink.c | 23 +++++++++++++++++------ 3 files changed, 23 insertions(+), 6 deletions(-) diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h index ead01874..f02975e 100644 --- a/include/net/rtnetlink.h +++ b/include/net/rtnetlink.h @@ -70,6 +70,10 @@ struct rtnl_link_ops { struct nlattr *data[], struct netlink_ext_ack *extack); + struct net_device *(*alloc_link)(struct net *src_net, + const char *dev_name, + struct nlattr *tb[]); + void (*free_link)(struct net_device *dev); int (*newlink)(struct net *src_net, struct net_device *dev, struct nlattr *tb[], diff --git a/net/core/dev.c b/net/core/dev.c index 07ed21d..6a5a31f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7953,6 +7953,8 @@ void netdev_run_todo(void) WARN_ON(rcu_access_pointer(dev->ip6_ptr)); WARN_ON(dev->dn_ptr); + if (dev->rtnl_link_ops && dev->rtnl_link_ops->free_link) + dev->rtnl_link_ops->free_link(dev); if (dev->priv_destructor) dev->priv_destructor(dev); if (dev->needs_free_netdev) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index dabba2a..0d57394 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -304,6 +304,9 @@ int __rtnl_link_register(struct rtnl_link_ops *ops) if (ops->setup && !ops->dellink) ops->dellink = unregister_netdevice_queue; + if (!ops->free_link) + ops->free_link = free_netdev; + list_add_tail(&ops->list, &link_ops); return 0; } @@ -2556,10 +2559,18 @@ struct net_device *rtnl_create_link(struct net *net, else if (ops->get_num_rx_queues) num_rx_queues = ops->get_num_rx_queues(); - dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, - ops->setup, num_tx_queues, num_rx_queues); - if (!dev) - return ERR_PTR(-ENOMEM); + if (ops->alloc_link) { + dev = ops->alloc_link(net, ifname, tb); + + if (IS_ERR(dev)) + return dev; + } else { + dev = alloc_netdev_mqs(ops->priv_size, ifname, + name_assign_type, ops->setup, + num_tx_queues, num_rx_queues); + if (!dev) + return ERR_PTR(-ENOMEM); + } dev_net_set(dev, net); dev->rtnl_link_ops = ops; @@ -2821,13 +2832,13 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) { /* If device is not registered at all, free it now */ if (dev->reg_state == NETREG_UNINITIALIZED) - free_netdev(dev); + ops->free_link(dev); goto out; } } else { err = register_netdevice(dev); if (err < 0) { - free_netdev(dev); + ops->free_link(dev); goto out; } } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html