diff options
Diffstat (limited to 'net/core/gso_test.c')
| -rw-r--r-- | net/core/gso_test.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/net/core/gso_test.c b/net/core/gso_test.c deleted file mode 100644 index 358c44680d91..000000000000 --- a/net/core/gso_test.c +++ /dev/null @@ -1,274 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later - -#include <kunit/test.h> -#include <linux/skbuff.h> - -static const char hdr[] = "abcdefgh"; -#define GSO_TEST_SIZE 1000 - -static void __init_skb(struct sk_buff *skb) -{ - skb_reset_mac_header(skb); - memcpy(skb_mac_header(skb), hdr, sizeof(hdr)); - - /* skb_segment expects skb->data at start of payload */ - skb_pull(skb, sizeof(hdr)); - skb_reset_network_header(skb); - skb_reset_transport_header(skb); - - /* proto is arbitrary, as long as not ETH_P_TEB or vlan */ - skb->protocol = htons(ETH_P_ATALK); - skb_shinfo(skb)->gso_size = GSO_TEST_SIZE; -} - -enum gso_test_nr { - GSO_TEST_LINEAR, - GSO_TEST_NO_GSO, - GSO_TEST_FRAGS, - GSO_TEST_FRAGS_PURE, - GSO_TEST_GSO_PARTIAL, - GSO_TEST_FRAG_LIST, - GSO_TEST_FRAG_LIST_PURE, - GSO_TEST_FRAG_LIST_NON_UNIFORM, - GSO_TEST_GSO_BY_FRAGS, -}; - -struct gso_test_case { - enum gso_test_nr id; - const char *name; - - /* input */ - unsigned int linear_len; - unsigned int nr_frags; - const unsigned int *frags; - unsigned int nr_frag_skbs; - const unsigned int *frag_skbs; - - /* output as expected */ - unsigned int nr_segs; - const unsigned int *segs; -}; - -static struct gso_test_case cases[] = { - { - .id = GSO_TEST_NO_GSO, - .name = "no_gso", - .linear_len = GSO_TEST_SIZE, - .nr_segs = 1, - .segs = (const unsigned int[]) { GSO_TEST_SIZE }, - }, - { - .id = GSO_TEST_LINEAR, - .name = "linear", - .linear_len = GSO_TEST_SIZE + GSO_TEST_SIZE + 1, - .nr_segs = 3, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, 1 }, - }, - { - .id = GSO_TEST_FRAGS, - .name = "frags", - .linear_len = GSO_TEST_SIZE, - .nr_frags = 2, - .frags = (const unsigned int[]) { GSO_TEST_SIZE, 1 }, - .nr_segs = 3, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, 1 }, - }, - { - .id = GSO_TEST_FRAGS_PURE, - .name = "frags_pure", - .nr_frags = 3, - .frags = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, 2 }, - .nr_segs = 3, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, 2 }, - }, - { - .id = GSO_TEST_GSO_PARTIAL, - .name = "gso_partial", - .linear_len = GSO_TEST_SIZE, - .nr_frags = 2, - .frags = (const unsigned int[]) { GSO_TEST_SIZE, 3 }, - .nr_segs = 2, - .segs = (const unsigned int[]) { 2 * GSO_TEST_SIZE, 3 }, - }, - { - /* commit 89319d3801d1: frag_list on mss boundaries */ - .id = GSO_TEST_FRAG_LIST, - .name = "frag_list", - .linear_len = GSO_TEST_SIZE, - .nr_frag_skbs = 2, - .frag_skbs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE }, - .nr_segs = 3, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, GSO_TEST_SIZE }, - }, - { - .id = GSO_TEST_FRAG_LIST_PURE, - .name = "frag_list_pure", - .nr_frag_skbs = 2, - .frag_skbs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE }, - .nr_segs = 2, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE }, - }, - { - /* commit 43170c4e0ba7: GRO of frag_list trains */ - .id = GSO_TEST_FRAG_LIST_NON_UNIFORM, - .name = "frag_list_non_uniform", - .linear_len = GSO_TEST_SIZE, - .nr_frag_skbs = 4, - .frag_skbs = (const unsigned int[]) { GSO_TEST_SIZE, 1, GSO_TEST_SIZE, 2 }, - .nr_segs = 4, - .segs = (const unsigned int[]) { GSO_TEST_SIZE, GSO_TEST_SIZE, GSO_TEST_SIZE, 3 }, - }, - { - /* commit 3953c46c3ac7 ("sk_buff: allow segmenting based on frag sizes") and - * commit 90017accff61 ("sctp: Add GSO support") - * - * "there will be a cover skb with protocol headers and - * children ones containing the actual segments" - */ - .id = GSO_TEST_GSO_BY_FRAGS, - .name = "gso_by_frags", - .nr_frag_skbs = 4, - .frag_skbs = (const unsigned int[]) { 100, 200, 300, 400 }, - .nr_segs = 4, - .segs = (const unsigned int[]) { 100, 200, 300, 400 }, - }, -}; - -static void gso_test_case_to_desc(struct gso_test_case *t, char *desc) -{ - sprintf(desc, "%s", t->name); -} - -KUNIT_ARRAY_PARAM(gso_test, cases, gso_test_case_to_desc); - -static void gso_test_func(struct kunit *test) -{ - const int shinfo_size = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - struct sk_buff *skb, *segs, *cur, *next, *last; - const struct gso_test_case *tcase; - netdev_features_t features; - struct page *page; - int i; - - tcase = test->param_value; - - page = alloc_page(GFP_KERNEL); - KUNIT_ASSERT_NOT_NULL(test, page); - skb = build_skb(page_address(page), sizeof(hdr) + tcase->linear_len + shinfo_size); - KUNIT_ASSERT_NOT_NULL(test, skb); - __skb_put(skb, sizeof(hdr) + tcase->linear_len); - - __init_skb(skb); - - if (tcase->nr_frags) { - unsigned int pg_off = 0; - - page = alloc_page(GFP_KERNEL); - KUNIT_ASSERT_NOT_NULL(test, page); - page_ref_add(page, tcase->nr_frags - 1); - - for (i = 0; i < tcase->nr_frags; i++) { - skb_fill_page_desc(skb, i, page, pg_off, tcase->frags[i]); - pg_off += tcase->frags[i]; - } - - KUNIT_ASSERT_LE(test, pg_off, PAGE_SIZE); - - skb->data_len = pg_off; - skb->len += skb->data_len; - skb->truesize += skb->data_len; - } - - if (tcase->frag_skbs) { - unsigned int total_size = 0, total_true_size = 0; - struct sk_buff *frag_skb, *prev = NULL; - - 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), - frag_size + shinfo_size); - KUNIT_ASSERT_NOT_NULL(test, frag_skb); - __skb_put(frag_skb, frag_size); - - if (prev) - prev->next = frag_skb; - else - skb_shinfo(skb)->frag_list = frag_skb; - prev = frag_skb; - - total_size += frag_size; - total_true_size += frag_skb->truesize; - } - - skb->len += total_size; - skb->data_len += total_size; - skb->truesize += total_true_size; - - if (tcase->id == GSO_TEST_GSO_BY_FRAGS) - skb_shinfo(skb)->gso_size = GSO_BY_FRAGS; - } - - features = NETIF_F_SG | NETIF_F_HW_CSUM; - if (tcase->id == GSO_TEST_GSO_PARTIAL) - features |= NETIF_F_GSO_PARTIAL; - - /* TODO: this should also work with SG, - * rather than hit BUG_ON(i >= nfrags) - */ - if (tcase->id == GSO_TEST_FRAG_LIST_NON_UNIFORM) - features &= ~NETIF_F_SG; - - segs = skb_segment(skb, features); - if (IS_ERR(segs)) { - KUNIT_FAIL(test, "segs error %pe", segs); - goto free_gso_skb; - } else if (!segs) { - KUNIT_FAIL(test, "no segments"); - goto free_gso_skb; - } - - last = segs->prev; - for (cur = segs, i = 0; cur; cur = next, i++) { - next = cur->next; - - KUNIT_ASSERT_EQ(test, cur->len, sizeof(hdr) + tcase->segs[i]); - - /* segs have skb->data pointing to the mac header */ - KUNIT_ASSERT_PTR_EQ(test, skb_mac_header(cur), cur->data); - KUNIT_ASSERT_PTR_EQ(test, skb_network_header(cur), cur->data + sizeof(hdr)); - - /* header was copied to all segs */ - KUNIT_ASSERT_EQ(test, memcmp(skb_mac_header(cur), hdr, sizeof(hdr)), 0); - - /* last seg can be found through segs->prev pointer */ - if (!next) - KUNIT_ASSERT_PTR_EQ(test, cur, last); - - consume_skb(cur); - } - - KUNIT_ASSERT_EQ(test, i, tcase->nr_segs); - -free_gso_skb: - consume_skb(skb); -} - -static struct kunit_case gso_test_cases[] = { - KUNIT_CASE_PARAM(gso_test_func, gso_test_gen_params), - {} -}; - -static struct kunit_suite gso_test_suite = { - .name = "net_core_gso", - .test_cases = gso_test_cases, -}; - -kunit_test_suite(gso_test_suite); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("KUnit tests for segmentation offload"); |