diff options
| -rw-r--r-- | lib/test_bpf.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index 6843d0b62032..e2617516d31f 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -23,6 +23,7 @@ #include <linux/netdevice.h> #include <linux/if_vlan.h> #include <linux/random.h> +#include <linux/highmem.h> /* General test specific settings */ #define MAX_SUBTESTS 3 @@ -56,6 +57,7 @@ /* Flags that can be passed to test cases */ #define FLAG_NO_DATA BIT(0) #define FLAG_EXPECTED_FAIL BIT(1) +#define FLAG_SKB_FRAG BIT(2) enum { CLASSIC = BIT(6), /* Old BPF instructions only. */ @@ -81,6 +83,7 @@ struct bpf_test { __u32 result; } test[MAX_SUBTESTS]; int (*fill_helper)(struct bpf_test *self); + __u8 frag_data[MAX_DATA]; }; /* Large test cases need separate allocation and fill handler. */ @@ -4525,6 +4528,9 @@ static struct sk_buff *populate_skb(char *buf, int size) static void *generate_test_data(struct bpf_test *test, int sub) { + struct sk_buff *skb; + struct page *page; + if (test->aux & FLAG_NO_DATA) return NULL; @@ -4532,7 +4538,38 @@ static void *generate_test_data(struct bpf_test *test, int sub) * subtests generate skbs of different sizes based on * the same data. */ - return populate_skb(test->data, test->test[sub].data_size); + skb = populate_skb(test->data, test->test[sub].data_size); + if (!skb) + return NULL; + + if (test->aux & FLAG_SKB_FRAG) { + /* + * when the test requires a fragmented skb, add a + * single fragment to the skb, filled with + * test->frag_data. + */ + void *ptr; + + page = alloc_page(GFP_KERNEL); + + if (!page) + goto err_kfree_skb; + + ptr = kmap(page); + if (!ptr) + goto err_free_page; + memcpy(ptr, test->frag_data, MAX_DATA); + kunmap(page); + skb_add_rx_frag(skb, 0, page, 0, MAX_DATA, MAX_DATA); + } + + return skb; + +err_free_page: + __free_page(page); +err_kfree_skb: + kfree_skb(skb); + return NULL; } static void release_test_data(const struct bpf_test *test, void *data) |