Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Highlights:

   1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.

   2) Add fib_sync_mem to control the amount of dirty memory we allow to
      queue up between synchronize RCU calls, from David Ahern.

   3) Make flow classifier more lockless, from Vlad Buslov.

   4) Add PHY downshift support to aquantia driver, from Heiner
      Kallweit.

   5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
      contention on SLAB spinlocks in heavy RPC workloads.

   6) Partial GSO offload support in XFRM, from Boris Pismenny.

   7) Add fast link down support to ethtool, from Heiner Kallweit.

   8) Use siphash for IP ID generator, from Eric Dumazet.

   9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
      entries, from David Ahern.

  10) Move skb->xmit_more into a per-cpu variable, from Florian
      Westphal.

  11) Improve eBPF verifier speed and increase maximum program size,
      from Alexei Starovoitov.

  12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
      spinlocks. From Neil Brown.

  13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.

  14) Improve link partner cap detection in generic PHY code, from
      Heiner Kallweit.

  15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
      Maguire.

  16) Remove SKB list implementation assumptions in SCTP, your's truly.

  17) Various cleanups, optimizations, and simplifications in r8169
      driver. From Heiner Kallweit.

  18) Add memory accounting on TX and RX path of SCTP, from Xin Long.

  19) Switch PHY drivers over to use dynamic featue detection, from
      Heiner Kallweit.

  20) Support flow steering without masking in dpaa2-eth, from Ioana
      Ciocoi.

  21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
      Pirko.

  22) Increase the strict parsing of current and future netlink
      attributes, also export such policies to userspace. From Johannes
      Berg.

  23) Allow DSA tag drivers to be modular, from Andrew Lunn.

  24) Remove legacy DSA probing support, also from Andrew Lunn.

  25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
      Haabendal.

  26) Add a generic tracepoint for TX queue timeouts to ease debugging,
      from Cong Wang.

  27) More indirect call optimizations, from Paolo Abeni"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
  cxgb4: Fix error path in cxgb4_init_module
  net: phy: improve pause mode reporting in phy_print_status
  dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
  net: macb: Change interrupt and napi enable order in open
  net: ll_temac: Improve error message on error IRQ
  net/sched: remove block pointer from common offload structure
  net: ethernet: support of_get_mac_address new ERR_PTR error
  net: usb: smsc: fix warning reported by kbuild test robot
  staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
  net: dsa: support of_get_mac_address new ERR_PTR error
  net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
  vrf: sit mtu should not be updated when vrf netdev is the link
  net: dsa: Fix error cleanup path in dsa_init_module
  l2tp: Fix possible NULL pointer dereference
  taprio: add null check on sched_nest to avoid potential null pointer dereference
  net: mvpp2: cls: fix less than zero check on a u32 variable
  net_sched: sch_fq: handle non connected flows
  net_sched: sch_fq: do not assume EDT packets are ordered
  net: hns3: use devm_kcalloc when allocating desc_cb
  net: hns3: some cleanup for struct hns3_enet_ring
  ...

1 files changed, 447 insertions, 0 deletions

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
new file mode 100644
index 000000000000..b509b941d5ca
--- /dev/null
+++ b/drivers/net/netdevsim/dev.c
@@ -0,0 +1,447 @@
+/*
+ * Copyright (c) 2018 Cumulus Networks. All rights reserved.
+ * Copyright (c) 2018 David Ahern <[email protected]>
+ * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/random.h>
+#include <linux/rtnetlink.h>
+#include <net/devlink.h>
+
+#include "netdevsim.h"
+
+static struct dentry *nsim_dev_ddir;
+
+static int nsim_dev_debugfs_init(struct nsim_dev *nsim_dev)
+{
+	char dev_ddir_name[16];
+
+	sprintf(dev_ddir_name, DRV_NAME "%u", nsim_dev->nsim_bus_dev->dev.id);
+	nsim_dev->ddir = debugfs_create_dir(dev_ddir_name, nsim_dev_ddir);
+	if (IS_ERR_OR_NULL(nsim_dev->ddir))
+		return PTR_ERR_OR_ZERO(nsim_dev->ddir) ?: -EINVAL;
+	nsim_dev->ports_ddir = debugfs_create_dir("ports", nsim_dev->ddir);
+	if (IS_ERR_OR_NULL(nsim_dev->ports_ddir))
+		return PTR_ERR_OR_ZERO(nsim_dev->ports_ddir) ?: -EINVAL;
+	return 0;
+}
+
+static void nsim_dev_debugfs_exit(struct nsim_dev *nsim_dev)
+{
+	debugfs_remove_recursive(nsim_dev->ports_ddir);
+	debugfs_remove_recursive(nsim_dev->ddir);
+}
+
+static int nsim_dev_port_debugfs_init(struct nsim_dev *nsim_dev,
+				      struct nsim_dev_port *nsim_dev_port)
+{
+	char port_ddir_name[16];
+	char dev_link_name[32];
+
+	sprintf(port_ddir_name, "%u", nsim_dev_port->port_index);
+	nsim_dev_port->ddir = debugfs_create_dir(port_ddir_name,
+						 nsim_dev->ports_ddir);
+	if (IS_ERR_OR_NULL(nsim_dev_port->ddir))
+		return -ENOMEM;
+
+	sprintf(dev_link_name, "../../../" DRV_NAME "%u",
+		nsim_dev->nsim_bus_dev->dev.id);
+	debugfs_create_symlink("dev", nsim_dev_port->ddir, dev_link_name);
+
+	return 0;
+}
+
+static void nsim_dev_port_debugfs_exit(struct nsim_dev_port *nsim_dev_port)
+{
+	debugfs_remove_recursive(nsim_dev_port->ddir);
+}
+
+static u64 nsim_dev_ipv4_fib_resource_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV4_FIB, false);
+}
+
+static u64 nsim_dev_ipv4_fib_rules_res_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV4_FIB_RULES, false);
+}
+
+static u64 nsim_dev_ipv6_fib_resource_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV6_FIB, false);
+}
+
+static u64 nsim_dev_ipv6_fib_rules_res_occ_get(void *priv)
+{
+	struct nsim_dev *nsim_dev = priv;
+
+	return nsim_fib_get_val(nsim_dev->fib_data,
+				NSIM_RESOURCE_IPV6_FIB_RULES, false);
+}
+
+static int nsim_dev_resources_register(struct devlink *devlink)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	struct devlink_resource_size_params params = {
+		.size_max = (u64)-1,
+		.size_granularity = 1,
+		.unit = DEVLINK_RESOURCE_UNIT_ENTRY
+	};
+	int err;
+	u64 n;
+
+	/* Resources for IPv4 */
+	err = devlink_resource_register(devlink, "IPv4", (u64)-1,
+					NSIM_RESOURCE_IPV4,
+					DEVLINK_RESOURCE_ID_PARENT_TOP,
+					&params);
+	if (err) {
+		pr_err("Failed to register IPv4 top resource\n");
+		goto out;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV4_FIB, true);
+	err = devlink_resource_register(devlink, "fib", n,
+					NSIM_RESOURCE_IPV4_FIB,
+					NSIM_RESOURCE_IPV4, &params);
+	if (err) {
+		pr_err("Failed to register IPv4 FIB resource\n");
+		return err;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV4_FIB_RULES, true);
+	err = devlink_resource_register(devlink, "fib-rules", n,
+					NSIM_RESOURCE_IPV4_FIB_RULES,
+					NSIM_RESOURCE_IPV4, &params);
+	if (err) {
+		pr_err("Failed to register IPv4 FIB rules resource\n");
+		return err;
+	}
+
+	/* Resources for IPv6 */
+	err = devlink_resource_register(devlink, "IPv6", (u64)-1,
+					NSIM_RESOURCE_IPV6,
+					DEVLINK_RESOURCE_ID_PARENT_TOP,
+					&params);
+	if (err) {
+		pr_err("Failed to register IPv6 top resource\n");
+		goto out;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV6_FIB, true);
+	err = devlink_resource_register(devlink, "fib", n,
+					NSIM_RESOURCE_IPV6_FIB,
+					NSIM_RESOURCE_IPV6, &params);
+	if (err) {
+		pr_err("Failed to register IPv6 FIB resource\n");
+		return err;
+	}
+
+	n = nsim_fib_get_val(nsim_dev->fib_data,
+			     NSIM_RESOURCE_IPV6_FIB_RULES, true);
+	err = devlink_resource_register(devlink, "fib-rules", n,
+					NSIM_RESOURCE_IPV6_FIB_RULES,
+					NSIM_RESOURCE_IPV6, &params);
+	if (err) {
+		pr_err("Failed to register IPv6 FIB rules resource\n");
+		return err;
+	}
+
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB,
+					  nsim_dev_ipv4_fib_resource_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB_RULES,
+					  nsim_dev_ipv4_fib_rules_res_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB,
+					  nsim_dev_ipv6_fib_resource_occ_get,
+					  nsim_dev);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB_RULES,
+					  nsim_dev_ipv6_fib_rules_res_occ_get,
+					  nsim_dev);
+out:
+	return err;
+}
+
+static int nsim_dev_reload(struct devlink *devlink,
+			   struct netlink_ext_ack *extack)
+{
+	struct nsim_dev *nsim_dev = devlink_priv(devlink);
+	enum nsim_resource_id res_ids[] = {
+		NSIM_RESOURCE_IPV4_FIB, NSIM_RESOURCE_IPV4_FIB_RULES,
+		NSIM_RESOURCE_IPV6_FIB, NSIM_RESOURCE_IPV6_FIB_RULES
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(res_ids); ++i) {
+		int err;
+		u64 val;
+
+		err = devlink_resource_size_get(devlink, res_ids[i], &val);
+		if (!err) {
+			err = nsim_fib_set_max(nsim_dev->fib_data,
+					       res_ids[i], val, extack);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
+static const struct devlink_ops nsim_dev_devlink_ops = {
+	.reload = nsim_dev_reload,
+};
+
+static struct nsim_dev *
+nsim_dev_create(struct nsim_bus_dev *nsim_bus_dev, unsigned int port_count)
+{
+	struct nsim_dev *nsim_dev;
+	struct devlink *devlink;
+	int err;
+
+	devlink = devlink_alloc(&nsim_dev_devlink_ops, sizeof(*nsim_dev));
+	if (!devlink)
+		return ERR_PTR(-ENOMEM);
+	nsim_dev = devlink_priv(devlink);
+	nsim_dev->nsim_bus_dev = nsim_bus_dev;
+	nsim_dev->switch_id.id_len = sizeof(nsim_dev->switch_id.id);
+	get_random_bytes(nsim_dev->switch_id.id, nsim_dev->switch_id.id_len);
+	INIT_LIST_HEAD(&nsim_dev->port_list);
+	mutex_init(&nsim_dev->port_list_lock);
+
+	nsim_dev->fib_data = nsim_fib_create();
+	if (IS_ERR(nsim_dev->fib_data)) {
+		err = PTR_ERR(nsim_dev->fib_data);
+		goto err_devlink_free;
+	}
+
+	err = nsim_dev_resources_register(devlink);
+	if (err)
+		goto err_fib_destroy;
+
+	err = devlink_register(devlink, &nsim_bus_dev->dev);
+	if (err)
+		goto err_resources_unregister;
+
+	err = nsim_dev_debugfs_init(nsim_dev);
+	if (err)
+		goto err_dl_unregister;
+
+	err = nsim_bpf_dev_init(nsim_dev);
+	if (err)
+		goto err_debugfs_exit;
+
+	return nsim_dev;
+
+err_debugfs_exit:
+	nsim_dev_debugfs_exit(nsim_dev);
+err_dl_unregister:
+	devlink_unregister(devlink);
+err_resources_unregister:
+	devlink_resources_unregister(devlink, NULL);
+err_fib_destroy:
+	nsim_fib_destroy(nsim_dev->fib_data);
+err_devlink_free:
+	devlink_free(devlink);
+	return ERR_PTR(err);
+}
+
+static void nsim_dev_destroy(struct nsim_dev *nsim_dev)
+{
+	struct devlink *devlink = priv_to_devlink(nsim_dev);
+
+	nsim_bpf_dev_exit(nsim_dev);
+	nsim_dev_debugfs_exit(nsim_dev);
+	devlink_unregister(devlink);
+	devlink_resources_unregister(devlink, NULL);
+	nsim_fib_destroy(nsim_dev->fib_data);
+	mutex_destroy(&nsim_dev->port_list_lock);
+	devlink_free(devlink);
+}
+
+static int __nsim_dev_port_add(struct nsim_dev *nsim_dev,
+			       unsigned int port_index)
+{
+	struct nsim_dev_port *nsim_dev_port;
+	struct devlink_port *devlink_port;
+	int err;
+
+	nsim_dev_port = kzalloc(sizeof(*nsim_dev_port), GFP_KERNEL);
+	if (!nsim_dev_port)
+		return -ENOMEM;
+	nsim_dev_port->port_index = port_index;
+
+	devlink_port = &nsim_dev_port->devlink_port;
+	devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
+			       port_index + 1, 0, 0,
+			       nsim_dev->switch_id.id,
+			       nsim_dev->switch_id.id_len);
+	err = devlink_port_register(priv_to_devlink(nsim_dev), devlink_port,
+				    port_index);
+	if (err)
+		goto err_port_free;
+
+	err = nsim_dev_port_debugfs_init(nsim_dev, nsim_dev_port);
+	if (err)
+		goto err_dl_port_unregister;
+
+	nsim_dev_port->ns = nsim_create(nsim_dev, nsim_dev_port);
+	if (IS_ERR(nsim_dev_port->ns)) {
+		err = PTR_ERR(nsim_dev_port->ns);
+		goto err_port_debugfs_exit;
+	}
+
+	devlink_port_type_eth_set(devlink_port, nsim_dev_port->ns->netdev);
+	list_add(&nsim_dev_port->list, &nsim_dev->port_list);
+
+	return 0;
+
+err_port_debugfs_exit:
+	nsim_dev_port_debugfs_exit(nsim_dev_port);
+err_dl_port_unregister:
+	devlink_port_unregister(devlink_port);
+err_port_free:
+	kfree(nsim_dev_port);
+	return err;
+}
+
+static void __nsim_dev_port_del(struct nsim_dev_port *nsim_dev_port)
+{
+	struct devlink_port *devlink_port = &nsim_dev_port->devlink_port;
+
+	list_del(&nsim_dev_port->list);
+	devlink_port_type_clear(devlink_port);
+	nsim_destroy(nsim_dev_port->ns);
+	nsim_dev_port_debugfs_exit(nsim_dev_port);
+	devlink_port_unregister(devlink_port);
+	kfree(nsim_dev_port);
+}
+
+static void nsim_dev_port_del_all(struct nsim_dev *nsim_dev)
+{
+	struct nsim_dev_port *nsim_dev_port, *tmp;
+
+	list_for_each_entry_safe(nsim_dev_port, tmp,
+				 &nsim_dev->port_list, list)
+		__nsim_dev_port_del(nsim_dev_port);
+}
+
+int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev)
+{
+	struct nsim_dev *nsim_dev;
+	int i;
+	int err;
+
+	nsim_dev = nsim_dev_create(nsim_bus_dev, nsim_bus_dev->port_count);
+	if (IS_ERR(nsim_dev))
+		return PTR_ERR(nsim_dev);
+	dev_set_drvdata(&nsim_bus_dev->dev, nsim_dev);
+
+	for (i = 0; i < nsim_bus_dev->port_count; i++) {
+		err = __nsim_dev_port_add(nsim_dev, i);
+		if (err)
+			goto err_port_del_all;
+	}
+	return 0;
+
+err_port_del_all:
+	nsim_dev_port_del_all(nsim_dev);
+	nsim_dev_destroy(nsim_dev);
+	return err;
+}
+
+void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev)
+{
+	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+
+	nsim_dev_port_del_all(nsim_dev);
+	nsim_dev_destroy(nsim_dev);
+}
+
+static struct nsim_dev_port *
+__nsim_dev_port_lookup(struct nsim_dev *nsim_dev, unsigned int port_index)
+{
+	struct nsim_dev_port *nsim_dev_port;
+
+	list_for_each_entry(nsim_dev_port, &nsim_dev->port_list, list)
+		if (nsim_dev_port->port_index == port_index)
+			return nsim_dev_port;
+	return NULL;
+}
+
+int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
+		      unsigned int port_index)
+{
+	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+	int err;
+
+	mutex_lock(&nsim_dev->port_list_lock);
+	if (__nsim_dev_port_lookup(nsim_dev, port_index))
+		err = -EEXIST;
+	else
+		err = __nsim_dev_port_add(nsim_dev, port_index);
+	mutex_unlock(&nsim_dev->port_list_lock);
+	return err;
+}
+
+int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
+		      unsigned int port_index)
+{
+	struct nsim_dev *nsim_dev = dev_get_drvdata(&nsim_bus_dev->dev);
+	struct nsim_dev_port *nsim_dev_port;
+	int err = 0;
+
+	mutex_lock(&nsim_dev->port_list_lock);
+	nsim_dev_port = __nsim_dev_port_lookup(nsim_dev, port_index);
+	if (!nsim_dev_port)
+		err = -ENOENT;
+	else
+		__nsim_dev_port_del(nsim_dev_port);
+	mutex_unlock(&nsim_dev->port_list_lock);
+	return err;
+}
+
+int nsim_dev_init(void)
+{
+	nsim_dev_ddir = debugfs_create_dir(DRV_NAME, NULL);
+	if (IS_ERR_OR_NULL(nsim_dev_ddir))
+		return -ENOMEM;
+	return 0;
+}
+
+void nsim_dev_exit(void)
+{
+	debugfs_remove_recursive(nsim_dev_ddir);
+}