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

Pull networking updates from David Miller:
 "Another merge window, another pull full of stuff:

   1) Support alternative names for network devices, from Jiri Pirko.

   2) Introduce per-netns netdev notifiers, also from Jiri Pirko.

   3) Support MSG_PEEK in vsock/virtio, from Matias Ezequiel Vara
      Larsen.

   4) Allow compiling out the TLS TOE code, from Jakub Kicinski.

   5) Add several new tracepoints to the kTLS code, also from Jakub.

   6) Support set channels ethtool callback in ena driver, from Sameeh
      Jubran.

   7) New SCTP events SCTP_ADDR_ADDED, SCTP_ADDR_REMOVED,
      SCTP_ADDR_MADE_PRIM, and SCTP_SEND_FAILED_EVENT. From Xin Long.

   8) Add XDP support to mvneta driver, from Lorenzo Bianconi.

   9) Lots of netfilter hw offload fixes, cleanups and enhancements,
      from Pablo Neira Ayuso.

  10) PTP support for aquantia chips, from Egor Pomozov.

  11) Add UDP segmentation offload support to igb, ixgbe, and i40e. From
      Josh Hunt.

  12) Add smart nagle to tipc, from Jon Maloy.

  13) Support L2 field rewrite by TC offloads in bnxt_en, from Venkat
      Duvvuru.

  14) Add a flow mask cache to OVS, from Tonghao Zhang.

  15) Add XDP support to ice driver, from Maciej Fijalkowski.

  16) Add AF_XDP support to ice driver, from Krzysztof Kazimierczak.

  17) Support UDP GSO offload in atlantic driver, from Igor Russkikh.

  18) Support it in stmmac driver too, from Jose Abreu.

  19) Support TIPC encryption and auth, from Tuong Lien.

  20) Introduce BPF trampolines, from Alexei Starovoitov.

  21) Make page_pool API more numa friendly, from Saeed Mahameed.

  22) Introduce route hints to ipv4 and ipv6, from Paolo Abeni.

  23) Add UDP segmentation offload to cxgb4, Rahul Lakkireddy"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1857 commits)
  libbpf: Fix usage of u32 in userspace code
  mm: Implement no-MMU variant of vmalloc_user_node_flags
  slip: Fix use-after-free Read in slip_open
  net: dsa: sja1105: fix sja1105_parse_rgmii_delays()
  macvlan: schedule bc_work even if error
  enetc: add support Credit Based Shaper(CBS) for hardware offload
  net: phy: add helpers phy_(un)lock_mdio_bus
  mdio_bus: don't use managed reset-controller
  ax88179_178a: add ethtool_op_get_ts_info()
  mlxsw: spectrum_router: Fix use of uninitialized adjacency index
  mlxsw: spectrum_router: After underlay moves, demote conflicting tunnels
  bpf: Simplify __bpf_arch_text_poke poke type handling
  bpf: Introduce BPF_TRACE_x helper for the tracing tests
  bpf: Add bpf_jit_blinding_enabled for !CONFIG_BPF_JIT
  bpf, testing: Add various tail call test cases
  bpf, x86: Emit patchable direct jump as tail call
  bpf: Constant map key tracking for prog array pokes
  bpf: Add poke dependency tracking for prog array maps
  bpf: Add initial poke descriptor table for jit images
  bpf: Move owner type, jited info into array auxiliary data
  ...

1 files changed, 107 insertions, 69 deletions

diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index 1a251f76d09b..13540dee7364 100644
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -18,7 +18,7 @@
 #include <net/ip_fib.h>
 #include <net/ip6_fib.h>
 #include <net/fib_rules.h>
-#include <net/netns/generic.h>
+#include <net/net_namespace.h>
 
 #include "netdevsim.h"
 
@@ -33,15 +33,14 @@ struct nsim_per_fib_data {
 };
 
 struct nsim_fib_data {
+	struct notifier_block fib_nb;
 	struct nsim_per_fib_data ipv4;
 	struct nsim_per_fib_data ipv6;
 };
 
-static unsigned int nsim_fib_net_id;
-
-u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max)
+u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
+		     enum nsim_resource_id res_id, bool max)
 {
-	struct nsim_fib_data *fib_data = net_generic(net, nsim_fib_net_id);
 	struct nsim_fib_entry *entry;
 
 	switch (res_id) {
@@ -64,12 +63,10 @@ u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max)
 	return max ? entry->max : entry->num;
 }
 
-int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,
-		     struct netlink_ext_ack *extack)
+static void nsim_fib_set_max(struct nsim_fib_data *fib_data,
+			     enum nsim_resource_id res_id, u64 val)
 {
-	struct nsim_fib_data *fib_data = net_generic(net, nsim_fib_net_id);
 	struct nsim_fib_entry *entry;
-	int err = 0;
 
 	switch (res_id) {
 	case NSIM_RESOURCE_IPV4_FIB:
@@ -85,20 +82,10 @@ int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val,
 		entry = &fib_data->ipv6.rules;
 		break;
 	default:
-		return 0;
-	}
-
-	/* not allowing a new max to be less than curren occupancy
-	 * --> no means of evicting entries
-	 */
-	if (val < entry->num) {
-		NL_SET_ERR_MSG_MOD(extack, "New size is less than current occupancy");
-		err = -EINVAL;
-	} else {
-		entry->max = val;
+		WARN_ON(1);
+		return;
 	}
-
-	return err;
+	entry->max = val;
 }
 
 static int nsim_fib_rule_account(struct nsim_fib_entry *entry, bool add,
@@ -120,9 +107,9 @@ static int nsim_fib_rule_account(struct nsim_fib_entry *entry, bool add,
 	return err;
 }
 
-static int nsim_fib_rule_event(struct fib_notifier_info *info, bool add)
+static int nsim_fib_rule_event(struct nsim_fib_data *data,
+			       struct fib_notifier_info *info, bool add)
 {
-	struct nsim_fib_data *data = net_generic(info->net, nsim_fib_net_id);
 	struct netlink_ext_ack *extack = info->extack;
 	int err = 0;
 
@@ -157,9 +144,9 @@ static int nsim_fib_account(struct nsim_fib_entry *entry, bool add,
 	return err;
 }
 
-static int nsim_fib_event(struct fib_notifier_info *info, bool add)
+static int nsim_fib_event(struct nsim_fib_data *data,
+			  struct fib_notifier_info *info, bool add)
 {
-	struct nsim_fib_data *data = net_generic(info->net, nsim_fib_net_id);
 	struct netlink_ext_ack *extack = info->extack;
 	int err = 0;
 
@@ -178,18 +165,22 @@ static int nsim_fib_event(struct fib_notifier_info *info, bool add)
 static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event,
 			     void *ptr)
 {
+	struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data,
+						  fib_nb);
 	struct fib_notifier_info *info = ptr;
 	int err = 0;
 
 	switch (event) {
 	case FIB_EVENT_RULE_ADD: /* fall through */
 	case FIB_EVENT_RULE_DEL:
-		err = nsim_fib_rule_event(info, event == FIB_EVENT_RULE_ADD);
+		err = nsim_fib_rule_event(data, info,
+					  event == FIB_EVENT_RULE_ADD);
 		break;
 
 	case FIB_EVENT_ENTRY_ADD:  /* fall through */
 	case FIB_EVENT_ENTRY_DEL:
-		err = nsim_fib_event(info, event == FIB_EVENT_ENTRY_ADD);
+		err = nsim_fib_event(data, info,
+				     event == FIB_EVENT_ENTRY_ADD);
 		break;
 	}
 
@@ -199,69 +190,116 @@ static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event,
 /* inconsistent dump, trying again */
 static void nsim_fib_dump_inconsistent(struct notifier_block *nb)
 {
-	struct nsim_fib_data *data;
-	struct net *net;
+	struct nsim_fib_data *data = container_of(nb, struct nsim_fib_data,
+						  fib_nb);
 
-	rcu_read_lock();
-	for_each_net_rcu(net) {
-		data = net_generic(net, nsim_fib_net_id);
+	data->ipv4.fib.num = 0ULL;
+	data->ipv4.rules.num = 0ULL;
+	data->ipv6.fib.num = 0ULL;
+	data->ipv6.rules.num = 0ULL;
+}
 
-		data->ipv4.fib.num = 0ULL;
-		data->ipv4.rules.num = 0ULL;
+static u64 nsim_fib_ipv4_resource_occ_get(void *priv)
+{
+	struct nsim_fib_data *data = priv;
 
-		data->ipv6.fib.num = 0ULL;
-		data->ipv6.rules.num = 0ULL;
-	}
-	rcu_read_unlock();
+	return nsim_fib_get_val(data, NSIM_RESOURCE_IPV4_FIB, false);
 }
 
-static struct notifier_block nsim_fib_nb = {
-	.notifier_call = nsim_fib_event_nb,
-};
-
-/* Initialize per network namespace state */
-static int __net_init nsim_fib_netns_init(struct net *net)
+static u64 nsim_fib_ipv4_rules_res_occ_get(void *priv)
 {
-	struct nsim_fib_data *data = net_generic(net, nsim_fib_net_id);
+	struct nsim_fib_data *data = priv;
 
-	data->ipv4.fib.max = (u64)-1;
-	data->ipv4.rules.max = (u64)-1;
+	return nsim_fib_get_val(data, NSIM_RESOURCE_IPV4_FIB_RULES, false);
+}
 
-	data->ipv6.fib.max = (u64)-1;
-	data->ipv6.rules.max = (u64)-1;
+static u64 nsim_fib_ipv6_resource_occ_get(void *priv)
+{
+	struct nsim_fib_data *data = priv;
 
-	return 0;
+	return nsim_fib_get_val(data, NSIM_RESOURCE_IPV6_FIB, false);
 }
 
-static struct pernet_operations nsim_fib_net_ops = {
-	.init = nsim_fib_netns_init,
-	.id   = &nsim_fib_net_id,
-	.size = sizeof(struct nsim_fib_data),
-};
+static u64 nsim_fib_ipv6_rules_res_occ_get(void *priv)
+{
+	struct nsim_fib_data *data = priv;
+
+	return nsim_fib_get_val(data, NSIM_RESOURCE_IPV6_FIB_RULES, false);
+}
 
-void nsim_fib_exit(void)
+static void nsim_fib_set_max_all(struct nsim_fib_data *data,
+				 struct devlink *devlink)
 {
-	unregister_fib_notifier(&nsim_fib_nb);
-	unregister_pernet_subsys(&nsim_fib_net_ops);
+	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)
+			val = (u64) -1;
+		nsim_fib_set_max(data, res_ids[i], val);
+	}
 }
 
-int nsim_fib_init(void)
+struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
+				      struct netlink_ext_ack *extack)
 {
+	struct nsim_fib_data *data;
 	int err;
 
-	err = register_pernet_subsys(&nsim_fib_net_ops);
-	if (err < 0) {
-		pr_err("Failed to register pernet subsystem\n");
-		goto err_out;
-	}
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return ERR_PTR(-ENOMEM);
+
+	nsim_fib_set_max_all(data, devlink);
 
-	err = register_fib_notifier(&nsim_fib_nb, nsim_fib_dump_inconsistent);
-	if (err < 0) {
+	data->fib_nb.notifier_call = nsim_fib_event_nb;
+	err = register_fib_notifier(devlink_net(devlink), &data->fib_nb,
+				    nsim_fib_dump_inconsistent, extack);
+	if (err) {
 		pr_err("Failed to register fib notifier\n");
-		unregister_pernet_subsys(&nsim_fib_net_ops);
 		goto err_out;
 	}
 
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB,
+					  nsim_fib_ipv4_resource_occ_get,
+					  data);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV4_FIB_RULES,
+					  nsim_fib_ipv4_rules_res_occ_get,
+					  data);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB,
+					  nsim_fib_ipv6_resource_occ_get,
+					  data);
+	devlink_resource_occ_get_register(devlink,
+					  NSIM_RESOURCE_IPV6_FIB_RULES,
+					  nsim_fib_ipv6_rules_res_occ_get,
+					  data);
+	return data;
+
 err_out:
-	return err;
+	kfree(data);
+	return ERR_PTR(err);
+}
+
+void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *data)
+{
+	devlink_resource_occ_get_unregister(devlink,
+					    NSIM_RESOURCE_IPV6_FIB_RULES);
+	devlink_resource_occ_get_unregister(devlink,
+					    NSIM_RESOURCE_IPV6_FIB);
+	devlink_resource_occ_get_unregister(devlink,
+					    NSIM_RESOURCE_IPV4_FIB_RULES);
+	devlink_resource_occ_get_unregister(devlink,
+					    NSIM_RESOURCE_IPV4_FIB);
+	unregister_fib_notifier(devlink_net(devlink), &data->fib_nb);
+	kfree(data);
 }