diff options
Diffstat (limited to 'net/mctp/test/route-test.c')
| -rw-r--r-- | net/mctp/test/route-test.c | 544 |
1 files changed, 544 insertions, 0 deletions
diff --git a/net/mctp/test/route-test.c b/net/mctp/test/route-test.c new file mode 100644 index 000000000000..36fac3daf86a --- /dev/null +++ b/net/mctp/test/route-test.c @@ -0,0 +1,544 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <kunit/test.h> + +#include "utils.h" + +struct mctp_test_route { + struct mctp_route rt; + struct sk_buff_head pkts; +}; + +static int mctp_test_route_output(struct mctp_route *rt, struct sk_buff *skb) +{ + struct mctp_test_route *test_rt = container_of(rt, struct mctp_test_route, rt); + + skb_queue_tail(&test_rt->pkts, skb); + + return 0; +} + +/* local version of mctp_route_alloc() */ +static struct mctp_test_route *mctp_route_test_alloc(void) +{ + struct mctp_test_route *rt; + + rt = kzalloc(sizeof(*rt), GFP_KERNEL); + if (!rt) + return NULL; + + INIT_LIST_HEAD(&rt->rt.list); + refcount_set(&rt->rt.refs, 1); + rt->rt.output = mctp_test_route_output; + + skb_queue_head_init(&rt->pkts); + + return rt; +} + +static struct mctp_test_route *mctp_test_create_route(struct net *net, + struct mctp_dev *dev, + mctp_eid_t eid, + unsigned int mtu) +{ + struct mctp_test_route *rt; + + rt = mctp_route_test_alloc(); + if (!rt) + return NULL; + + rt->rt.min = eid; + rt->rt.max = eid; + rt->rt.mtu = mtu; + rt->rt.type = RTN_UNSPEC; + if (dev) + mctp_dev_hold(dev); + rt->rt.dev = dev; + + list_add_rcu(&rt->rt.list, &net->mctp.routes); + + return rt; +} + +static void mctp_test_route_destroy(struct kunit *test, + struct mctp_test_route *rt) +{ + unsigned int refs; + + rtnl_lock(); + list_del_rcu(&rt->rt.list); + rtnl_unlock(); + + skb_queue_purge(&rt->pkts); + if (rt->rt.dev) + mctp_dev_put(rt->rt.dev); + + refs = refcount_read(&rt->rt.refs); + KUNIT_ASSERT_EQ_MSG(test, refs, 1, "route ref imbalance"); + + kfree_rcu(&rt->rt, rcu); +} + +static struct sk_buff *mctp_test_create_skb(const struct mctp_hdr *hdr, + unsigned int data_len) +{ + size_t hdr_len = sizeof(*hdr); + struct sk_buff *skb; + unsigned int i; + u8 *buf; + + skb = alloc_skb(hdr_len + data_len, GFP_KERNEL); + if (!skb) + return NULL; + + memcpy(skb_put(skb, hdr_len), hdr, hdr_len); + + buf = skb_put(skb, data_len); + for (i = 0; i < data_len; i++) + buf[i] = i & 0xff; + + return skb; +} + +static struct sk_buff *__mctp_test_create_skb_data(const struct mctp_hdr *hdr, + const void *data, + size_t data_len) +{ + size_t hdr_len = sizeof(*hdr); + struct sk_buff *skb; + + skb = alloc_skb(hdr_len + data_len, GFP_KERNEL); + if (!skb) + return NULL; + + memcpy(skb_put(skb, hdr_len), hdr, hdr_len); + memcpy(skb_put(skb, data_len), data, data_len); + + return skb; +} + +#define mctp_test_create_skb_data(h, d) \ + __mctp_test_create_skb_data(h, d, sizeof(*d)) + +struct mctp_frag_test { + unsigned int mtu; + unsigned int msgsize; + unsigned int n_frags; +}; + +static void mctp_test_fragment(struct kunit *test) +{ + const struct mctp_frag_test *params; + int rc, i, n, mtu, msgsize; + struct mctp_test_route *rt; + struct sk_buff *skb; + struct mctp_hdr hdr; + u8 seq; + + params = test->param_value; + mtu = params->mtu; + msgsize = params->msgsize; + + hdr.ver = 1; + hdr.src = 8; + hdr.dest = 10; + hdr.flags_seq_tag = MCTP_HDR_FLAG_TO; + + skb = mctp_test_create_skb(&hdr, msgsize); + KUNIT_ASSERT_TRUE(test, skb); + + rt = mctp_test_create_route(&init_net, NULL, 10, mtu); + KUNIT_ASSERT_TRUE(test, rt); + + /* The refcount would usually be incremented as part of a route lookup, + * but we're setting the route directly here. + */ + refcount_inc(&rt->rt.refs); + + rc = mctp_do_fragment_route(&rt->rt, skb, mtu, MCTP_TAG_OWNER); + KUNIT_EXPECT_FALSE(test, rc); + + n = rt->pkts.qlen; + + KUNIT_EXPECT_EQ(test, n, params->n_frags); + + for (i = 0;; i++) { + struct mctp_hdr *hdr2; + struct sk_buff *skb2; + u8 tag_mask, seq2; + bool first, last; + + first = i == 0; + last = i == (n - 1); + + skb2 = skb_dequeue(&rt->pkts); + + if (!skb2) + break; + + hdr2 = mctp_hdr(skb2); + + tag_mask = MCTP_HDR_TAG_MASK | MCTP_HDR_FLAG_TO; + + KUNIT_EXPECT_EQ(test, hdr2->ver, hdr.ver); + KUNIT_EXPECT_EQ(test, hdr2->src, hdr.src); + KUNIT_EXPECT_EQ(test, hdr2->dest, hdr.dest); + KUNIT_EXPECT_EQ(test, hdr2->flags_seq_tag & tag_mask, + hdr.flags_seq_tag & tag_mask); + + KUNIT_EXPECT_EQ(test, + !!(hdr2->flags_seq_tag & MCTP_HDR_FLAG_SOM), first); + KUNIT_EXPECT_EQ(test, + !!(hdr2->flags_seq_tag & MCTP_HDR_FLAG_EOM), last); + + seq2 = (hdr2->flags_seq_tag >> MCTP_HDR_SEQ_SHIFT) & + MCTP_HDR_SEQ_MASK; + + if (first) { + seq = seq2; + } else { + seq++; + KUNIT_EXPECT_EQ(test, seq2, seq & MCTP_HDR_SEQ_MASK); + } + + if (!last) + KUNIT_EXPECT_EQ(test, skb2->len, mtu); + else + KUNIT_EXPECT_LE(test, skb2->len, mtu); + + kfree_skb(skb2); + } + + mctp_test_route_destroy(test, rt); +} + +static const struct mctp_frag_test mctp_frag_tests[] = { + {.mtu = 68, .msgsize = 63, .n_frags = 1}, + {.mtu = 68, .msgsize = 64, .n_frags = 1}, + {.mtu = 68, .msgsize = 65, .n_frags = 2}, + {.mtu = 68, .msgsize = 66, .n_frags = 2}, + {.mtu = 68, .msgsize = 127, .n_frags = 2}, + {.mtu = 68, .msgsize = 128, .n_frags = 2}, + {.mtu = 68, .msgsize = 129, .n_frags = 3}, + {.mtu = 68, .msgsize = 130, .n_frags = 3}, +}; + +static void mctp_frag_test_to_desc(const struct mctp_frag_test *t, char *desc) +{ + sprintf(desc, "mtu %d len %d -> %d frags", + t->msgsize, t->mtu, t->n_frags); +} + +KUNIT_ARRAY_PARAM(mctp_frag, mctp_frag_tests, mctp_frag_test_to_desc); + +struct mctp_rx_input_test { + struct mctp_hdr hdr; + bool input; +}; + +static void mctp_test_rx_input(struct kunit *test) +{ + const struct mctp_rx_input_test *params; + struct mctp_test_route *rt; + struct mctp_test_dev *dev; + struct sk_buff *skb; + + params = test->param_value; + + dev = mctp_test_create_dev(); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev); + + rt = mctp_test_create_route(&init_net, dev->mdev, 8, 68); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, rt); + + skb = mctp_test_create_skb(¶ms->hdr, 1); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb); + + __mctp_cb(skb); + + mctp_pkttype_receive(skb, dev->ndev, &mctp_packet_type, NULL); + + KUNIT_EXPECT_EQ(test, !!rt->pkts.qlen, params->input); + + mctp_test_route_destroy(test, rt); + mctp_test_destroy_dev(dev); +} + +#define RX_HDR(_ver, _src, _dest, _fst) \ + { .ver = _ver, .src = _src, .dest = _dest, .flags_seq_tag = _fst } + +/* we have a route for EID 8 only */ +static const struct mctp_rx_input_test mctp_rx_input_tests[] = { + { .hdr = RX_HDR(1, 10, 8, 0), .input = true }, + { .hdr = RX_HDR(1, 10, 9, 0), .input = false }, /* no input route */ + { .hdr = RX_HDR(2, 10, 8, 0), .input = false }, /* invalid version */ +}; + +static void mctp_rx_input_test_to_desc(const struct mctp_rx_input_test *t, + char *desc) +{ + sprintf(desc, "{%x,%x,%x,%x}", t->hdr.ver, t->hdr.src, t->hdr.dest, + t->hdr.flags_seq_tag); +} + +KUNIT_ARRAY_PARAM(mctp_rx_input, mctp_rx_input_tests, + mctp_rx_input_test_to_desc); + +/* set up a local dev, route on EID 8, and a socket listening on type 0 */ +static void __mctp_route_test_init(struct kunit *test, + struct mctp_test_dev **devp, + struct mctp_test_route **rtp, + struct socket **sockp) +{ + struct sockaddr_mctp addr; + struct mctp_test_route *rt; + struct mctp_test_dev *dev; + struct socket *sock; + int rc; + + dev = mctp_test_create_dev(); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev); + + rt = mctp_test_create_route(&init_net, dev->mdev, 8, 68); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, rt); + + rc = sock_create_kern(&init_net, AF_MCTP, SOCK_DGRAM, 0, &sock); + KUNIT_ASSERT_EQ(test, rc, 0); + + addr.smctp_family = AF_MCTP; + addr.smctp_network = MCTP_NET_ANY; + addr.smctp_addr.s_addr = 8; + addr.smctp_type = 0; + rc = kernel_bind(sock, (struct sockaddr *)&addr, sizeof(addr)); + KUNIT_ASSERT_EQ(test, rc, 0); + + *rtp = rt; + *devp = dev; + *sockp = sock; +} + +static void __mctp_route_test_fini(struct kunit *test, + struct mctp_test_dev *dev, + struct mctp_test_route *rt, + struct socket *sock) +{ + sock_release(sock); + mctp_test_route_destroy(test, rt); + mctp_test_destroy_dev(dev); +} + +struct mctp_route_input_sk_test { + struct mctp_hdr hdr; + u8 type; + bool deliver; +}; + +static void mctp_test_route_input_sk(struct kunit *test) +{ + const struct mctp_route_input_sk_test *params; + struct sk_buff *skb, *skb2; + struct mctp_test_route *rt; + struct mctp_test_dev *dev; + struct socket *sock; + int rc; + + params = test->param_value; + + __mctp_route_test_init(test, &dev, &rt, &sock); + + skb = mctp_test_create_skb_data(¶ms->hdr, ¶ms->type); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb); + + skb->dev = dev->ndev; + __mctp_cb(skb); + + rc = mctp_route_input(&rt->rt, skb); + + if (params->deliver) { + KUNIT_EXPECT_EQ(test, rc, 0); + + skb2 = skb_recv_datagram(sock->sk, 0, 1, &rc); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, skb2); + KUNIT_EXPECT_EQ(test, skb->len, 1); + + skb_free_datagram(sock->sk, skb2); + + } else { + KUNIT_EXPECT_NE(test, rc, 0); + skb2 = skb_recv_datagram(sock->sk, 0, 1, &rc); + KUNIT_EXPECT_PTR_EQ(test, skb2, NULL); + } + + __mctp_route_test_fini(test, dev, rt, sock); +} + +#define FL_S (MCTP_HDR_FLAG_SOM) +#define FL_E (MCTP_HDR_FLAG_EOM) +#define FL_T (MCTP_HDR_FLAG_TO) + +static const struct mctp_route_input_sk_test mctp_route_input_sk_tests[] = { + { .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_T), .type = 0, .deliver = true }, + { .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_T), .type = 1, .deliver = false }, + { .hdr = RX_HDR(1, 10, 8, FL_S | FL_E), .type = 0, .deliver = false }, + { .hdr = RX_HDR(1, 10, 8, FL_E | FL_T), .type = 0, .deliver = false }, + { .hdr = RX_HDR(1, 10, 8, FL_T), .type = 0, .deliver = false }, + { .hdr = RX_HDR(1, 10, 8, 0), .type = 0, .deliver = false }, +}; + +static void mctp_route_input_sk_to_desc(const struct mctp_route_input_sk_test *t, + char *desc) +{ + sprintf(desc, "{%x,%x,%x,%x} type %d", t->hdr.ver, t->hdr.src, + t->hdr.dest, t->hdr.flags_seq_tag, t->type); +} + +KUNIT_ARRAY_PARAM(mctp_route_input_sk, mctp_route_input_sk_tests, + mctp_route_input_sk_to_desc); + +struct mctp_route_input_sk_reasm_test { + const char *name; + struct mctp_hdr hdrs[4]; + int n_hdrs; + int rx_len; +}; + +static void mctp_test_route_input_sk_reasm(struct kunit *test) +{ + const struct mctp_route_input_sk_reasm_test *params; + struct sk_buff *skb, *skb2; + struct mctp_test_route *rt; + struct mctp_test_dev *dev; + struct socket *sock; + int i, rc; + u8 c; + + params = test->param_value; + + __mctp_route_test_init(test, &dev, &rt, &sock); + + for (i = 0; i < params->n_hdrs; i++) { + c = i; + skb = mctp_test_create_skb_data(¶ms->hdrs[i], &c); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb); + + skb->dev = dev->ndev; + __mctp_cb(skb); + + rc = mctp_route_input(&rt->rt, skb); + } + + skb2 = skb_recv_datagram(sock->sk, 0, 1, &rc); + + if (params->rx_len) { + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, skb2); + KUNIT_EXPECT_EQ(test, skb2->len, params->rx_len); + skb_free_datagram(sock->sk, skb2); + + } else { + KUNIT_EXPECT_PTR_EQ(test, skb2, NULL); + } + + __mctp_route_test_fini(test, dev, rt, sock); +} + +#define RX_FRAG(f, s) RX_HDR(1, 10, 8, FL_T | (f) | ((s) << MCTP_HDR_SEQ_SHIFT)) + +static const struct mctp_route_input_sk_reasm_test mctp_route_input_sk_reasm_tests[] = { + { + .name = "single packet", + .hdrs = { + RX_FRAG(FL_S | FL_E, 0), + }, + .n_hdrs = 1, + .rx_len = 1, + }, + { + .name = "single packet, offset seq", + .hdrs = { + RX_FRAG(FL_S | FL_E, 1), + }, + .n_hdrs = 1, + .rx_len = 1, + }, + { + .name = "start & end packets", + .hdrs = { + RX_FRAG(FL_S, 0), + RX_FRAG(FL_E, 1), + }, + .n_hdrs = 2, + .rx_len = 2, + }, + { + .name = "start & end packets, offset seq", + .hdrs = { + RX_FRAG(FL_S, 1), + RX_FRAG(FL_E, 2), + }, + .n_hdrs = 2, + .rx_len = 2, + }, + { + .name = "start & end packets, out of order", + .hdrs = { + RX_FRAG(FL_E, 1), + RX_FRAG(FL_S, 0), + }, + .n_hdrs = 2, + .rx_len = 0, + }, + { + .name = "start, middle & end packets", + .hdrs = { + RX_FRAG(FL_S, 0), + RX_FRAG(0, 1), + RX_FRAG(FL_E, 2), + }, + .n_hdrs = 3, + .rx_len = 3, + }, + { + .name = "missing seq", + .hdrs = { + RX_FRAG(FL_S, 0), + RX_FRAG(FL_E, 2), + }, + .n_hdrs = 2, + .rx_len = 0, + }, + { + .name = "seq wrap", + .hdrs = { + RX_FRAG(FL_S, 3), + RX_FRAG(FL_E, 0), + }, + .n_hdrs = 2, + .rx_len = 2, + }, +}; + +static void mctp_route_input_sk_reasm_to_desc( + const struct mctp_route_input_sk_reasm_test *t, + char *desc) +{ + sprintf(desc, "%s", t->name); +} + +KUNIT_ARRAY_PARAM(mctp_route_input_sk_reasm, mctp_route_input_sk_reasm_tests, + mctp_route_input_sk_reasm_to_desc); + +static struct kunit_case mctp_test_cases[] = { + KUNIT_CASE_PARAM(mctp_test_fragment, mctp_frag_gen_params), + KUNIT_CASE_PARAM(mctp_test_rx_input, mctp_rx_input_gen_params), + KUNIT_CASE_PARAM(mctp_test_route_input_sk, mctp_route_input_sk_gen_params), + KUNIT_CASE_PARAM(mctp_test_route_input_sk_reasm, + mctp_route_input_sk_reasm_gen_params), + {} +}; + +static struct kunit_suite mctp_test_suite = { + .name = "mctp", + .test_cases = mctp_test_cases, +}; + +kunit_test_suite(mctp_test_suite); |