1 files changed, 16 insertions, 38 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index 5393b4b719d7..c0fc6bdad1e3 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -925,8 +925,8 @@ set_rcvbuf:
 EXPORT_SYMBOL(sock_setsockopt);
 
 
-void cred_to_ucred(struct pid *pid, const struct cred *cred,
-		   struct ucred *ucred)
+static void cred_to_ucred(struct pid *pid, const struct cred *cred,
+			  struct ucred *ucred)
 {
 	ucred->pid = pid_vnr(pid);
 	ucred->uid = ucred->gid = -1;
@@ -937,7 +937,6 @@ void cred_to_ucred(struct pid *pid, const struct cred *cred,
 		ucred->gid = from_kgid_munged(current_ns, cred->egid);
 	}
 }
-EXPORT_SYMBOL_GPL(cred_to_ucred);
 
 int sock_getsockopt(struct socket *sock, int level, int optname,
 		    char __user *optval, int __user *optlen)
@@ -1168,6 +1167,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		v.val = sock_flag(sk, SOCK_FILTER_LOCKED);
 		break;
 
+	case SO_BPF_EXTENSIONS:
+		v.val = bpf_tell_extensions();
+		break;
+
 	case SO_SELECT_ERR_QUEUE:
 		v.val = sock_flag(sk, SOCK_SELECT_ERR_QUEUE);
 		break;
@@ -1308,19 +1311,7 @@ static void sk_prot_free(struct proto *prot, struct sock *sk)
 	module_put(owner);
 }
 
-#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
-void sock_update_classid(struct sock *sk)
-{
-	u32 classid;
-
-	classid = task_cls_classid(current);
-	if (classid != sk->sk_classid)
-		sk->sk_classid = classid;
-}
-EXPORT_SYMBOL(sock_update_classid);
-#endif
-
-#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
 void sock_update_netprioidx(struct sock *sk)
 {
 	if (in_interrupt())
@@ -1666,22 +1657,6 @@ struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
 EXPORT_SYMBOL(sock_wmalloc);
 
 /*
- * Allocate a skb from the socket's receive buffer.
- */
-struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force,
-			     gfp_t priority)
-{
-	if (force || atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf) {
-		struct sk_buff *skb = alloc_skb(size, priority);
-		if (skb) {
-			skb_set_owner_r(skb, sk);
-			return skb;
-		}
-	}
-	return NULL;
-}
-
-/*
  * Allocate a memory block from the socket's option memory buffer.
  */
 void *sock_kmalloc(struct sock *sk, int size, gfp_t priority)
@@ -1800,7 +1775,9 @@ struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
 			while (order) {
 				if (npages >= 1 << order) {
 					page = alloc_pages(sk->sk_allocation |
-							   __GFP_COMP | __GFP_NOWARN,
+							   __GFP_COMP |
+							   __GFP_NOWARN |
+							   __GFP_NORETRY,
 							   order);
 					if (page)
 						goto fill_page;
@@ -1865,14 +1842,12 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio)
 		put_page(pfrag->page);
 	}
 
-	/* We restrict high order allocations to users that can afford to wait */
-	order = (prio & __GFP_WAIT) ? SKB_FRAG_PAGE_ORDER : 0;
-
+	order = SKB_FRAG_PAGE_ORDER;
 	do {
 		gfp_t gfp = prio;
 
 		if (order)
-			gfp |= __GFP_COMP | __GFP_NOWARN;
+			gfp |= __GFP_COMP | __GFP_NOWARN | __GFP_NORETRY;
 		pfrag->page = alloc_pages(gfp, order);
 		if (likely(pfrag->page)) {
 			pfrag->offset = 0;
@@ -2382,10 +2357,13 @@ void release_sock(struct sock *sk)
 	if (sk->sk_backlog.tail)
 		__release_sock(sk);
 
+	/* Warning : release_cb() might need to release sk ownership,
+	 * ie call sock_release_ownership(sk) before us.
+	 */
 	if (sk->sk_prot->release_cb)
 		sk->sk_prot->release_cb(sk);
 
-	sk->sk_lock.owned = 0;
+	sock_release_ownership(sk);
 	if (waitqueue_active(&sk->sk_lock.wq))
 		wake_up(&sk->sk_lock.wq);
 	spin_unlock_bh(&sk->sk_lock.slock);