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-rw-r--r--lib/test_bpf.c112
1 files changed, 103 insertions, 9 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 5ef3eccee27c..cecb230833be 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -6859,34 +6859,128 @@ err_page0:
return NULL;
}
-static __init int test_skb_segment(void)
+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);
netdev_features_t features;
+};
+
+static struct skb_segment_test skb_segment_tests[] __initconst = {
+ {
+ .descr = "gso_with_rx_frags",
+ .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
+ }
+};
+
+static __init int test_skb_segment_single(const struct skb_segment_test *test)
+{
struct sk_buff *skb, *segs;
int ret = -1;
- features = NETIF_F_SG | NETIF_F_GSO_PARTIAL | NETIF_F_IP_CSUM |
- NETIF_F_IPV6_CSUM;
- features |= NETIF_F_RXCSUM;
- skb = build_test_skb();
+ skb = test->build_skb();
if (!skb) {
pr_info("%s: failed to build_test_skb", __func__);
goto done;
}
- segs = skb_segment(skb, features);
+ segs = skb_segment(skb, test->features);
if (!IS_ERR(segs)) {
kfree_skb_list(segs);
ret = 0;
- pr_info("%s: success in skb_segment!", __func__);
- } else {
- pr_info("%s: failed in skb_segment!", __func__);
}
kfree_skb(skb);
done:
return ret;
}
+static __init int test_skb_segment(void)
+{
+ int i, err_cnt = 0, pass_cnt = 0;
+
+ for (i = 0; i < ARRAY_SIZE(skb_segment_tests); i++) {
+ const struct skb_segment_test *test = &skb_segment_tests[i];
+
+ pr_info("#%d %s ", i, test->descr);
+
+ if (test_skb_segment_single(test)) {
+ pr_cont("FAIL\n");
+ err_cnt++;
+ } else {
+ pr_cont("PASS\n");
+ pass_cnt++;
+ }
+ }
+
+ pr_info("%s: Summary: %d PASSED, %d FAILED\n", __func__,
+ pass_cnt, err_cnt);
+ return err_cnt ? -EINVAL : 0;
+}
+
static __init int test_bpf(void)
{
int i, err_cnt = 0, pass_cnt = 0;