1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// SPDX-License-Identifier: GPL-2.0
#include <kunit/test.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,
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;
rt->rt.dev = NULL; /* somewhat illegal, but fine for current tests */
list_add_rcu(&rt->rt.list, &net->mctp.routes);
return rt;
}
static void mctp_test_route_destroy(struct mctp_test_route *rt)
{
rtnl_lock();
list_del_rcu(&rt->rt.list);
rtnl_unlock();
skb_queue_purge(&rt->pkts);
kfree_rcu(&rt->rt, rcu);
}
static struct sk_buff *mctp_test_create_skb(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;
}
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, 10, mtu);
KUNIT_ASSERT_TRUE(test, rt);
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(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);
static struct kunit_case mctp_test_cases[] = {
KUNIT_CASE_PARAM(mctp_test_fragment, mctp_frag_gen_params),
{}
};
static struct kunit_suite mctp_test_suite = {
.name = "mctp",
.test_cases = mctp_test_cases,
};
kunit_test_suite(mctp_test_suite);
|
