diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_bpf.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index c952df82b515..cecb230833be 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -6859,6 +6859,60 @@ err_page0: return NULL; } +static __init struct sk_buff *build_test_skb_linear_no_head_frag(void) +{ + unsigned int alloc_size = 2000; + unsigned int headroom = 102, doffset = 72, data_size = 1308; + struct sk_buff *skb[2]; + int i; + + /* skbs linked in a frag_list, both with linear data, with head_frag=0 + * (data allocated by kmalloc), both have tcp data of 1308 bytes + * (total payload is 2616 bytes). + * Data offset is 72 bytes (40 ipv6 hdr, 32 tcp hdr). Some headroom. + */ + for (i = 0; i < 2; i++) { + skb[i] = alloc_skb(alloc_size, GFP_KERNEL); + if (!skb[i]) { + if (i == 0) + goto err_skb0; + else + goto err_skb1; + } + + skb[i]->protocol = htons(ETH_P_IPV6); + skb_reserve(skb[i], headroom); + skb_put(skb[i], doffset + data_size); + skb_reset_network_header(skb[i]); + if (i == 0) + skb_reset_mac_header(skb[i]); + else + skb_set_mac_header(skb[i], -ETH_HLEN); + __skb_pull(skb[i], doffset); + } + + /* setup shinfo. + * mimic bpf_skb_proto_4_to_6, which resets gso_segs and assigns a + * reduced gso_size. + */ + skb_shinfo(skb[0])->gso_size = 1288; + skb_shinfo(skb[0])->gso_type = SKB_GSO_TCPV6 | SKB_GSO_DODGY; + skb_shinfo(skb[0])->gso_segs = 0; + skb_shinfo(skb[0])->frag_list = skb[1]; + + /* adjust skb[0]'s len */ + skb[0]->len += skb[1]->len; + skb[0]->data_len += skb[1]->len; + skb[0]->truesize += skb[1]->truesize; + + return skb[0]; + +err_skb1: + kfree_skb(skb[0]); +err_skb0: + return NULL; +} + struct skb_segment_test { const char *descr; struct sk_buff *(*build_skb)(void); @@ -6871,6 +6925,15 @@ static struct skb_segment_test skb_segment_tests[] __initconst = { .build_skb = build_test_skb, .features = NETIF_F_SG | NETIF_F_GSO_PARTIAL | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM + }, + { + .descr = "gso_linear_no_head_frag", + .build_skb = build_test_skb_linear_no_head_frag, + .features = NETIF_F_SG | NETIF_F_FRAGLIST | + NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_GSO | + NETIF_F_LLTX_BIT | NETIF_F_GRO | + NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | + NETIF_F_HW_VLAN_STAG_TX_BIT } }; |