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net: gso_test: support CONFIG_MAX_SKB_FRAGS up to 45

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The test allocs a single page to hold all the frag_list skbs. This
is insufficient on kernels with CONFIG_MAX_SKB_FRAGS=45, due to the
increased skb_shared_info frags[] array length.

        gso_test_func: ASSERTION FAILED at net/core/gso_test.c:210
        Expected alloc_size <= ((1UL) << 12), but
            alloc_size == 5075 (0x13d3)
            ((1UL) << 12) == 4096 (0x1000)

Simplify the logic. Just allocate a page for each frag_list skb.

Fixes: 4688ecb138 ("net: expand skb_segment unit test with frag_list coverage")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn 2023-11-10 10:36:00 -05:00 committed by David S. Miller
parent 438cbcdf10
commit e6daf129cc
1 changed files with 5 additions and 9 deletions
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14
net/core/gso_test.c
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@ -180,18 +180,17 @@ static void gso_test_func(struct kunit *test)
}
if (tcase->frag_skbs) {
unsigned int total_size = 0, total_true_size = 0, alloc_size = 0;
unsigned int total_size = 0, total_true_size = 0;
struct sk_buff *frag_skb, *prev = NULL;
page = alloc_page(GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, page);
page_ref_add(page, tcase->nr_frag_skbs - 1);
for (i = 0; i < tcase->nr_frag_skbs; i++) {
unsigned int frag_size;
page = alloc_page(GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, page);
frag_size = tcase->frag_skbs[i];
frag_skb = build_skb(page_address(page) + alloc_size,
frag_skb = build_skb(page_address(page),
frag_size + shinfo_size);
KUNIT_ASSERT_NOT_NULL(test, frag_skb);
__skb_put(frag_skb, frag_size);
@ -204,11 +203,8 @@ static void gso_test_func(struct kunit *test)
total_size += frag_size;
total_true_size += frag_skb->truesize;
alloc_size += frag_size + shinfo_size;
}
KUNIT_ASSERT_LE(test, alloc_size, PAGE_SIZE);
skb->len += total_size;
skb->data_len += total_size;
skb->truesize += total_true_size;