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Diffstat (limited to 'net/ipv4/tcp_bpf.c')
-rw-r--r--net/ipv4/tcp_bpf.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 37f4cb2bba5c..bc7d2a586e18 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -15,8 +15,8 @@ int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
{
struct iov_iter *iter = &msg->msg_iter;
int peek = flags & MSG_PEEK;
- int i, ret, copied = 0;
struct sk_msg *msg_rx;
+ int i, copied = 0;
msg_rx = list_first_entry_or_null(&psock->ingress_msg,
struct sk_msg, list);
@@ -37,17 +37,16 @@ int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
page = sg_page(sge);
if (copied + copy > len)
copy = len - copied;
- ret = copy_page_to_iter(page, sge->offset, copy, iter);
- if (ret != copy) {
- msg_rx->sg.start = i;
- return -EFAULT;
- }
+ copy = copy_page_to_iter(page, sge->offset, copy, iter);
+ if (!copy)
+ return copied ? copied : -EFAULT;
copied += copy;
if (likely(!peek)) {
sge->offset += copy;
sge->length -= copy;
- sk_mem_uncharge(sk, copy);
+ if (!msg_rx->skb)
+ sk_mem_uncharge(sk, copy);
msg_rx->sg.size -= copy;
if (!sge->length) {
@@ -56,6 +55,11 @@ int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
put_page(page);
}
} else {
+ /* Lets not optimize peek case if copy_page_to_iter
+ * didn't copy the entire length lets just break.
+ */
+ if (copy != sge->length)
+ return copied;
sk_msg_iter_var_next(i);
}