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

Pull networking updates from David Miller:

 1) Support ipv6 checksum offload in sunvnet driver, from Shannon
    Nelson.

 2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric
    Dumazet.

 3) Allow generic XDP to work on virtual devices, from John Fastabend.

 4) Add bpf device maps and XDP_REDIRECT, which can be used to build
    arbitrary switching frameworks using XDP. From John Fastabend.

 5) Remove UFO offloads from the tree, gave us little other than bugs.

 6) Remove the IPSEC flow cache, from Florian Westphal.

 7) Support ipv6 route offload in mlxsw driver.

 8) Support VF representors in bnxt_en, from Sathya Perla.

 9) Add support for forward error correction modes to ethtool, from
    Vidya Sagar Ravipati.

10) Add time filter for packet scheduler action dumping, from Jamal Hadi
    Salim.

11) Extend the zerocopy sendmsg() used by virtio and tap to regular
    sockets via MSG_ZEROCOPY. From Willem de Bruijn.

12) Significantly rework value tracking in the BPF verifier, from Edward
    Cree.

13) Add new jump instructions to eBPF, from Daniel Borkmann.

14) Rework rtnetlink plumbing so that operations can be run without
    taking the RTNL semaphore. From Florian Westphal.

15) Support XDP in tap driver, from Jason Wang.

16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal.

17) Add Huawei hinic ethernet driver.

18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan
    Delalande.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits)
  i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq
  i40e: avoid NVM acquire deadlock during NVM update
  drivers: net: xgene: Remove return statement from void function
  drivers: net: xgene: Configure tx/rx delay for ACPI
  drivers: net: xgene: Read tx/rx delay for ACPI
  rocker: fix kcalloc parameter order
  rds: Fix non-atomic operation on shared flag variable
  net: sched: don't use GFP_KERNEL under spin lock
  vhost_net: correctly check tx avail during rx busy polling
  net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
  rxrpc: Make service connection lookup always check for retry
  net: stmmac: Delete dead code for MDIO registration
  gianfar: Fix Tx flow control deactivation
  cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6
  cxgb4: Fix pause frame count in t4_get_port_stats
  cxgb4: fix memory leak
  tun: rename generic_xdp to skb_xdp
  tun: reserve extra headroom only when XDP is set
  net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping
  net: dsa: bcm_sf2: Advertise number of egress queues
  ...

1 files changed, 168 insertions, 267 deletions

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 69b16ee327d9..f06253969972 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -24,6 +24,7 @@
 #include <linux/netfilter.h>
 #include <linux/module.h>
 #include <linux/cache.h>
+#include <linux/cpu.h>
 #include <linux/audit.h>
 #include <net/dst.h>
 #include <net/flow.h>
@@ -44,6 +45,8 @@ struct xfrm_flo {
 	u8 flags;
 };
 
+static DEFINE_PER_CPU(struct xfrm_dst *, xfrm_last_dst);
+static struct work_struct *xfrm_pcpu_work __read_mostly;
 static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);
 static struct xfrm_policy_afinfo const __rcu *xfrm_policy_afinfo[AF_INET6 + 1]
 						__read_mostly;
@@ -119,7 +122,7 @@ static const struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short fa
 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
 				    const xfrm_address_t *saddr,
 				    const xfrm_address_t *daddr,
-				    int family)
+				    int family, u32 mark)
 {
 	const struct xfrm_policy_afinfo *afinfo;
 	struct dst_entry *dst;
@@ -128,7 +131,7 @@ struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
 	if (unlikely(afinfo == NULL))
 		return ERR_PTR(-EAFNOSUPPORT);
 
-	dst = afinfo->dst_lookup(net, tos, oif, saddr, daddr);
+	dst = afinfo->dst_lookup(net, tos, oif, saddr, daddr, mark);
 
 	rcu_read_unlock();
 
@@ -140,7 +143,7 @@ static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x,
 						int tos, int oif,
 						xfrm_address_t *prev_saddr,
 						xfrm_address_t *prev_daddr,
-						int family)
+						int family, u32 mark)
 {
 	struct net *net = xs_net(x);
 	xfrm_address_t *saddr = &x->props.saddr;
@@ -156,7 +159,7 @@ static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x,
 		daddr = x->coaddr;
 	}
 
-	dst = __xfrm_dst_lookup(net, tos, oif, saddr, daddr, family);
+	dst = __xfrm_dst_lookup(net, tos, oif, saddr, daddr, family, mark);
 
 	if (!IS_ERR(dst)) {
 		if (prev_saddr != saddr)
@@ -246,36 +249,6 @@ expired:
 	xfrm_pol_put(xp);
 }
 
-static struct flow_cache_object *xfrm_policy_flo_get(struct flow_cache_object *flo)
-{
-	struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo);
-
-	if (unlikely(pol->walk.dead))
-		flo = NULL;
-	else
-		xfrm_pol_hold(pol);
-
-	return flo;
-}
-
-static int xfrm_policy_flo_check(struct flow_cache_object *flo)
-{
-	struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo);
-
-	return !pol->walk.dead;
-}
-
-static void xfrm_policy_flo_delete(struct flow_cache_object *flo)
-{
-	xfrm_pol_put(container_of(flo, struct xfrm_policy, flo));
-}
-
-static const struct flow_cache_ops xfrm_policy_fc_ops = {
-	.get = xfrm_policy_flo_get,
-	.check = xfrm_policy_flo_check,
-	.delete = xfrm_policy_flo_delete,
-};
-
 /* Allocate xfrm_policy. Not used here, it is supposed to be used by pfkeyv2
  * SPD calls.
  */
@@ -298,7 +271,6 @@ struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp)
 				(unsigned long)policy);
 		setup_timer(&policy->polq.hold_timer, xfrm_policy_queue_process,
 			    (unsigned long)policy);
-		policy->flo.ops = &xfrm_policy_fc_ops;
 	}
 	return policy;
 }
@@ -798,7 +770,6 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
 	else
 		hlist_add_head(&policy->bydst, chain);
 	__xfrm_policy_link(policy, dir);
-	atomic_inc(&net->xfrm.flow_cache_genid);
 
 	/* After previous checking, family can either be AF_INET or AF_INET6 */
 	if (policy->family == AF_INET)
@@ -1004,6 +975,8 @@ int xfrm_policy_flush(struct net *net, u8 type, bool task_valid)
 	}
 	if (!cnt)
 		err = -ESRCH;
+	else
+		xfrm_policy_cache_flush();
 out:
 	spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
 	return err;
@@ -1175,7 +1148,7 @@ fail:
 }
 
 static struct xfrm_policy *
-__xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir)
+xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir)
 {
 #ifdef CONFIG_XFRM_SUB_POLICY
 	struct xfrm_policy *pol;
@@ -1187,61 +1160,6 @@ __xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir
 	return xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, fl, family, dir);
 }
 
-static int flow_to_policy_dir(int dir)
-{
-	if (XFRM_POLICY_IN == FLOW_DIR_IN &&
-	    XFRM_POLICY_OUT == FLOW_DIR_OUT &&
-	    XFRM_POLICY_FWD == FLOW_DIR_FWD)
-		return dir;
-
-	switch (dir) {
-	default:
-	case FLOW_DIR_IN:
-		return XFRM_POLICY_IN;
-	case FLOW_DIR_OUT:
-		return XFRM_POLICY_OUT;
-	case FLOW_DIR_FWD:
-		return XFRM_POLICY_FWD;
-	}
-}
-
-static struct flow_cache_object *
-xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
-		   u8 dir, struct flow_cache_object *old_obj, void *ctx)
-{
-	struct xfrm_policy *pol;
-
-	if (old_obj)
-		xfrm_pol_put(container_of(old_obj, struct xfrm_policy, flo));
-
-	pol = __xfrm_policy_lookup(net, fl, family, flow_to_policy_dir(dir));
-	if (IS_ERR_OR_NULL(pol))
-		return ERR_CAST(pol);
-
-	/* Resolver returns two references:
-	 * one for cache and one for caller of flow_cache_lookup() */
-	xfrm_pol_hold(pol);
-
-	return &pol->flo;
-}
-
-static inline int policy_to_flow_dir(int dir)
-{
-	if (XFRM_POLICY_IN == FLOW_DIR_IN &&
-	    XFRM_POLICY_OUT == FLOW_DIR_OUT &&
-	    XFRM_POLICY_FWD == FLOW_DIR_FWD)
-		return dir;
-	switch (dir) {
-	default:
-	case XFRM_POLICY_IN:
-		return FLOW_DIR_IN;
-	case XFRM_POLICY_OUT:
-		return FLOW_DIR_OUT;
-	case XFRM_POLICY_FWD:
-		return FLOW_DIR_FWD;
-	}
-}
-
 static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
 						 const struct flowi *fl, u16 family)
 {
@@ -1261,7 +1179,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
 			}
 			err = security_xfrm_policy_lookup(pol->security,
 						      fl->flowi_secid,
-						      policy_to_flow_dir(dir));
+						      dir);
 			if (!err) {
 				if (!xfrm_pol_hold_rcu(pol))
 					goto again;
@@ -1422,14 +1340,14 @@ int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
 
 static int
 xfrm_get_saddr(struct net *net, int oif, xfrm_address_t *local,
-	       xfrm_address_t *remote, unsigned short family)
+	       xfrm_address_t *remote, unsigned short family, u32 mark)
 {
 	int err;
 	const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
 
 	if (unlikely(afinfo == NULL))
 		return -EINVAL;
-	err = afinfo->get_saddr(net, oif, local, remote);
+	err = afinfo->get_saddr(net, oif, local, remote, mark);
 	rcu_read_unlock();
 	return err;
 }
@@ -1460,7 +1378,7 @@ xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl,
 			if (xfrm_addr_any(local, tmpl->encap_family)) {
 				error = xfrm_get_saddr(net, fl->flowi_oif,
 						       &tmp, remote,
-						       tmpl->encap_family);
+						       tmpl->encap_family, 0);
 				if (error)
 					goto fail;
 				local = &tmp;
@@ -1545,58 +1463,6 @@ static int xfrm_get_tos(const struct flowi *fl, int family)
 	return tos;
 }
 
-static struct flow_cache_object *xfrm_bundle_flo_get(struct flow_cache_object *flo)
-{
-	struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo);
-	struct dst_entry *dst = &xdst->u.dst;
-
-	if (xdst->route == NULL) {
-		/* Dummy bundle - if it has xfrms we were not
-		 * able to build bundle as template resolution failed.
-		 * It means we need to try again resolving. */
-		if (xdst->num_xfrms > 0)
-			return NULL;
-	} else if (dst->flags & DST_XFRM_QUEUE) {
-		return NULL;
-	} else {
-		/* Real bundle */
-		if (stale_bundle(dst))
-			return NULL;
-	}
-
-	dst_hold(dst);
-	return flo;
-}
-
-static int xfrm_bundle_flo_check(struct flow_cache_object *flo)
-{
-	struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo);
-	struct dst_entry *dst = &xdst->u.dst;
-
-	if (!xdst->route)
-		return 0;
-	if (stale_bundle(dst))
-		return 0;
-
-	return 1;
-}
-
-static void xfrm_bundle_flo_delete(struct flow_cache_object *flo)
-{
-	struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo);
-	struct dst_entry *dst = &xdst->u.dst;
-
-	/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
-	dst->obsolete = DST_OBSOLETE_DEAD;
-	dst_release_immediate(dst);
-}
-
-static const struct flow_cache_ops xfrm_bundle_fc_ops = {
-	.get = xfrm_bundle_flo_get,
-	.check = xfrm_bundle_flo_check,
-	.delete = xfrm_bundle_flo_delete,
-};
-
 static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
 {
 	const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
@@ -1624,7 +1490,6 @@ static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
 		struct dst_entry *dst = &xdst->u.dst;
 
 		memset(dst + 1, 0, sizeof(*xdst) - sizeof(*dst));
-		xdst->flo.ops = &xfrm_bundle_fc_ops;
 	} else
 		xdst = ERR_PTR(-ENOBUFS);
 
@@ -1733,7 +1598,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 		if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
 			family = xfrm[i]->props.family;
 			dst = xfrm_dst_lookup(xfrm[i], tos, fl->flowi_oif,
-					      &saddr, &daddr, family);
+					      &saddr, &daddr, family,
+					      xfrm[i]->props.output_mark);
 			err = PTR_ERR(dst);
 			if (IS_ERR(dst))
 				goto put_states;
@@ -1840,6 +1706,102 @@ static int xfrm_expand_policies(const struct flowi *fl, u16 family,
 
 }
 
+static void xfrm_last_dst_update(struct xfrm_dst *xdst, struct xfrm_dst *old)
+{
+	this_cpu_write(xfrm_last_dst, xdst);
+	if (old)
+		dst_release(&old->u.dst);
+}
+
+static void __xfrm_pcpu_work_fn(void)
+{
+	struct xfrm_dst *old;
+
+	old = this_cpu_read(xfrm_last_dst);
+	if (old && !xfrm_bundle_ok(old))
+		xfrm_last_dst_update(NULL, old);
+}
+
+static void xfrm_pcpu_work_fn(struct work_struct *work)
+{
+	local_bh_disable();
+	rcu_read_lock();
+	__xfrm_pcpu_work_fn();
+	rcu_read_unlock();
+	local_bh_enable();
+}
+
+void xfrm_policy_cache_flush(void)
+{
+	struct xfrm_dst *old;
+	bool found = 0;
+	int cpu;
+
+	local_bh_disable();
+	rcu_read_lock();
+	for_each_possible_cpu(cpu) {
+		old = per_cpu(xfrm_last_dst, cpu);
+		if (old && !xfrm_bundle_ok(old)) {
+			if (smp_processor_id() == cpu) {
+				__xfrm_pcpu_work_fn();
+				continue;
+			}
+			found = true;
+			break;
+		}
+	}
+
+	rcu_read_unlock();
+	local_bh_enable();
+
+	if (!found)
+		return;
+
+	get_online_cpus();
+
+	for_each_possible_cpu(cpu) {
+		bool bundle_release;
+
+		rcu_read_lock();
+		old = per_cpu(xfrm_last_dst, cpu);
+		bundle_release = old && !xfrm_bundle_ok(old);
+		rcu_read_unlock();
+
+		if (!bundle_release)
+			continue;
+
+		if (cpu_online(cpu)) {
+			schedule_work_on(cpu, &xfrm_pcpu_work[cpu]);
+			continue;
+		}
+
+		rcu_read_lock();
+		old = per_cpu(xfrm_last_dst, cpu);
+		if (old && !xfrm_bundle_ok(old)) {
+			per_cpu(xfrm_last_dst, cpu) = NULL;
+			dst_release(&old->u.dst);
+		}
+		rcu_read_unlock();
+	}
+
+	put_online_cpus();
+}
+
+static bool xfrm_pol_dead(struct xfrm_dst *xdst)
+{
+	unsigned int num_pols = xdst->num_pols;
+	unsigned int pol_dead = 0, i;
+
+	for (i = 0; i < num_pols; i++)
+		pol_dead |= xdst->pols[i]->walk.dead;
+
+	/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
+	if (pol_dead)
+		xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
+
+	return pol_dead;
+}
+
 static struct xfrm_dst *
 xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols,
 			       const struct flowi *fl, u16 family,
@@ -1847,10 +1809,23 @@ xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols,
 {
 	struct net *net = xp_net(pols[0]);
 	struct xfrm_state *xfrm[XFRM_MAX_DEPTH];
+	struct xfrm_dst *xdst, *old;
 	struct dst_entry *dst;
-	struct xfrm_dst *xdst;
 	int err;
 
+	xdst = this_cpu_read(xfrm_last_dst);
+	if (xdst &&
+	    xdst->u.dst.dev == dst_orig->dev &&
+	    xdst->num_pols == num_pols &&
+	    !xfrm_pol_dead(xdst) &&
+	    memcmp(xdst->pols, pols,
+		   sizeof(struct xfrm_policy *) * num_pols) == 0 &&
+	    xfrm_bundle_ok(xdst)) {
+		dst_hold(&xdst->u.dst);
+		return xdst;
+	}
+
+	old = xdst;
 	/* Try to instantiate a bundle */
 	err = xfrm_tmpl_resolve(pols, num_pols, fl, xfrm, family);
 	if (err <= 0) {
@@ -1871,6 +1846,9 @@ xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols,
 	memcpy(xdst->pols, pols, sizeof(struct xfrm_policy *) * num_pols);
 	xdst->policy_genid = atomic_read(&pols[0]->genid);
 
+	atomic_set(&xdst->u.dst.__refcnt, 2);
+	xfrm_last_dst_update(xdst, old);
+
 	return xdst;
 }
 
@@ -2051,86 +2029,39 @@ free_dst:
 	goto out;
 }
 
-static struct flow_cache_object *
-xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
-		   struct flow_cache_object *oldflo, void *ctx)
+static struct xfrm_dst *
+xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, struct xfrm_flo *xflo)
 {
-	struct xfrm_flo *xflo = (struct xfrm_flo *)ctx;
 	struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
-	struct xfrm_dst *xdst, *new_xdst;
-	int num_pols = 0, num_xfrms = 0, i, err, pol_dead;
-
-	/* Check if the policies from old bundle are usable */
-	xdst = NULL;
-	if (oldflo) {
-		xdst = container_of(oldflo, struct xfrm_dst, flo);
-		num_pols = xdst->num_pols;
-		num_xfrms = xdst->num_xfrms;
-		pol_dead = 0;
-		for (i = 0; i < num_pols; i++) {
-			pols[i] = xdst->pols[i];
-			pol_dead |= pols[i]->walk.dead;
-		}
-		if (pol_dead) {
-			/* Mark DST_OBSOLETE_DEAD to fail the next
-			 * xfrm_dst_check()
-			 */
-			xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
-			dst_release_immediate(&xdst->u.dst);
-			xdst = NULL;
-			num_pols = 0;
-			num_xfrms = 0;
-			oldflo = NULL;
-		}
-	}
+	int num_pols = 0, num_xfrms = 0, err;
+	struct xfrm_dst *xdst;
 
 	/* Resolve policies to use if we couldn't get them from
 	 * previous cache entry */
-	if (xdst == NULL) {
-		num_pols = 1;
-		pols[0] = __xfrm_policy_lookup(net, fl, family,
-					       flow_to_policy_dir(dir));
-		err = xfrm_expand_policies(fl, family, pols,
+	num_pols = 1;
+	pols[0] = xfrm_policy_lookup(net, fl, family, dir);
+	err = xfrm_expand_policies(fl, family, pols,
 					   &num_pols, &num_xfrms);
-		if (err < 0)
-			goto inc_error;
-		if (num_pols == 0)
-			return NULL;
-		if (num_xfrms <= 0)
-			goto make_dummy_bundle;
-	}
+	if (err < 0)
+		goto inc_error;
+	if (num_pols == 0)
+		return NULL;
+	if (num_xfrms <= 0)
+		goto make_dummy_bundle;
 
-	new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family,
+	xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family,
 						  xflo->dst_orig);
-	if (IS_ERR(new_xdst)) {
-		err = PTR_ERR(new_xdst);
+	if (IS_ERR(xdst)) {
+		err = PTR_ERR(xdst);
 		if (err != -EAGAIN)
 			goto error;
-		if (oldflo == NULL)
-			goto make_dummy_bundle;
-		dst_hold(&xdst->u.dst);
-		return oldflo;
-	} else if (new_xdst == NULL) {
+		goto make_dummy_bundle;
+	} else if (xdst == NULL) {
 		num_xfrms = 0;
-		if (oldflo == NULL)
-			goto make_dummy_bundle;
-		xdst->num_xfrms = 0;
-		dst_hold(&xdst->u.dst);
-		return oldflo;
-	}
-
-	/* Kill the previous bundle */
-	if (xdst) {
-		/* The policies were stolen for newly generated bundle */
-		xdst->num_pols = 0;
-		/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
-		xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
-		dst_release_immediate(&xdst->u.dst);
+		goto make_dummy_bundle;
 	}
 
-	/* We do need to return one reference for original caller */
-	dst_hold(&new_xdst->u.dst);
-	return &new_xdst->flo;
+	return xdst;
 
 make_dummy_bundle:
 	/* We found policies, but there's no bundles to instantiate:
@@ -2146,17 +2077,12 @@ make_dummy_bundle:
 	memcpy(xdst->pols, pols, sizeof(struct xfrm_policy *) * num_pols);
 
 	dst_hold(&xdst->u.dst);
-	return &xdst->flo;
+	return xdst;
 
 inc_error:
 	XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR);
 error:
-	if (xdst != NULL) {
-		/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
-		xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
-		dst_release_immediate(&xdst->u.dst);
-	} else
-		xfrm_pols_put(pols, num_pols);
+	xfrm_pols_put(pols, num_pols);
 	return ERR_PTR(err);
 }
 
@@ -2187,11 +2113,10 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
 			      const struct sock *sk, int flags)
 {
 	struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
-	struct flow_cache_object *flo;
 	struct xfrm_dst *xdst;
 	struct dst_entry *dst, *route;
 	u16 family = dst_orig->ops->family;
-	u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT);
+	u8 dir = XFRM_POLICY_OUT;
 	int i, err, num_pols, num_xfrms = 0, drop_pols = 0;
 
 	dst = NULL;
@@ -2241,15 +2166,13 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
 		    !net->xfrm.policy_count[XFRM_POLICY_OUT])
 			goto nopol;
 
-		flo = flow_cache_lookup(net, fl, family, dir,
-					xfrm_bundle_lookup, &xflo);
-		if (flo == NULL)
+		xdst = xfrm_bundle_lookup(net, fl, family, dir, &xflo);
+		if (xdst == NULL)
 			goto nopol;
-		if (IS_ERR(flo)) {
-			err = PTR_ERR(flo);
+		if (IS_ERR(xdst)) {
+			err = PTR_ERR(xdst);
 			goto dropdst;
 		}
-		xdst = container_of(flo, struct xfrm_dst, flo);
 
 		num_pols = xdst->num_pols;
 		num_xfrms = xdst->num_xfrms;
@@ -2448,12 +2371,10 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
 	int pi;
 	int reverse;
 	struct flowi fl;
-	u8 fl_dir;
 	int xerr_idx = -1;
 
 	reverse = dir & ~XFRM_POLICY_MASK;
 	dir &= XFRM_POLICY_MASK;
-	fl_dir = policy_to_flow_dir(dir);
 
 	if (__xfrm_decode_session(skb, &fl, family, reverse) < 0) {
 		XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);
@@ -2485,16 +2406,8 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
 		}
 	}
 
-	if (!pol) {
-		struct flow_cache_object *flo;
-
-		flo = flow_cache_lookup(net, &fl, family, fl_dir,
-					xfrm_policy_lookup, NULL);
-		if (IS_ERR_OR_NULL(flo))
-			pol = ERR_CAST(flo);
-		else
-			pol = container_of(flo, struct xfrm_policy, flo);
-	}
+	if (!pol)
+		pol = xfrm_policy_lookup(net, &fl, family, dir);
 
 	if (IS_ERR(pol)) {
 		XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR);
@@ -2640,11 +2553,9 @@ static struct dst_entry *xfrm_dst_check(struct dst_entry *dst, u32 cookie)
 	 * notice.  That's what we are validating here via the
 	 * stale_bundle() check.
 	 *
-	 * When an xdst is removed from flow cache, DST_OBSOLETE_DEAD will
-	 * be marked on it.
 	 * When a dst is removed from the fib tree, DST_OBSOLETE_DEAD will
 	 * be marked on it.
-	 * Both will force stable_bundle() to fail on any xdst bundle with
+	 * This will force stale_bundle() to fail on any xdst bundle with
 	 * this dst linked in it.
 	 */
 	if (dst->obsolete < 0 && !stale_bundle(dst))
@@ -2684,18 +2595,6 @@ static struct dst_entry *xfrm_negative_advice(struct dst_entry *dst)
 	return dst;
 }
 
-void xfrm_garbage_collect(struct net *net)
-{
-	flow_cache_flush(net);
-}
-EXPORT_SYMBOL(xfrm_garbage_collect);
-
-void xfrm_garbage_collect_deferred(struct net *net)
-{
-	flow_cache_flush_deferred(net);
-}
-EXPORT_SYMBOL(xfrm_garbage_collect_deferred);
-
 static void xfrm_init_pmtu(struct dst_entry *dst)
 {
 	do {
@@ -3033,14 +2932,9 @@ static int __net_init xfrm_net_init(struct net *net)
 	rv = xfrm_sysctl_init(net);
 	if (rv < 0)
 		goto out_sysctl;
-	rv = flow_cache_init(net);
-	if (rv < 0)
-		goto out;
 
 	return 0;
 
-out:
-	xfrm_sysctl_fini(net);
 out_sysctl:
 	xfrm_policy_fini(net);
 out_policy:
@@ -3053,7 +2947,6 @@ out_statistics:
 
 static void __net_exit xfrm_net_exit(struct net *net)
 {
-	flow_cache_fini(net);
 	xfrm_sysctl_fini(net);
 	xfrm_policy_fini(net);
 	xfrm_state_fini(net);
@@ -3067,7 +2960,15 @@ static struct pernet_operations __net_initdata xfrm_net_ops = {
 
 void __init xfrm_init(void)
 {
-	flow_cache_hp_init();
+	int i;
+
+	xfrm_pcpu_work = kmalloc_array(NR_CPUS, sizeof(*xfrm_pcpu_work),
+				       GFP_KERNEL);
+	BUG_ON(!xfrm_pcpu_work);
+
+	for (i = 0; i < NR_CPUS; i++)
+		INIT_WORK(&xfrm_pcpu_work[i], xfrm_pcpu_work_fn);
+
 	register_pernet_subsys(&xfrm_net_ops);
 	seqcount_init(&xfrm_policy_hash_generation);
 	xfrm_input_init();