1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2023 Alexander V. Chernikov 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <tests/ktest.h> 29 #include <sys/cdefs.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/mbuf.h> 33 #include <netlink/netlink.h> 34 #include <netlink/netlink_ctl.h> 35 #include <netlink/netlink_message_writer.h> 36 37 #define KTEST_CALLER 38 #include <netlink/ktest_netlink_message_writer.h> 39 40 #ifdef INVARIANTS 41 42 struct test_mbuf_attrs { 43 uint32_t size; 44 uint32_t expected_avail; 45 uint32_t expected_count; 46 uint32_t wtype; 47 int waitok; 48 }; 49 50 #define _OUT(_field) offsetof(struct test_mbuf_attrs, _field) 51 static const struct nlattr_parser nla_p_mbuf_w[] = { 52 { .type = 1, .off = _OUT(size), .cb = nlattr_get_uint32 }, 53 { .type = 2, .off = _OUT(expected_avail), .cb = nlattr_get_uint32 }, 54 { .type = 3, .off = _OUT(expected_count), .cb = nlattr_get_uint32 }, 55 { .type = 4, .off = _OUT(wtype), .cb = nlattr_get_uint32 }, 56 { .type = 5, .off = _OUT(waitok), .cb = nlattr_get_uint32 }, 57 }; 58 #undef _OUT 59 NL_DECLARE_ATTR_PARSER(mbuf_w_parser, nla_p_mbuf_w); 60 61 static int 62 test_mbuf_parser(struct ktest_test_context *ctx, struct nlattr *nla) 63 { 64 struct test_mbuf_attrs *attrs = npt_alloc(ctx->npt, sizeof(*attrs)); 65 66 ctx->arg = attrs; 67 if (attrs != NULL) 68 return (nl_parse_nested(nla, &mbuf_w_parser, ctx->npt, attrs)); 69 return (ENOMEM); 70 } 71 72 static int 73 test_mbuf_writer_allocation(struct ktest_test_context *ctx) 74 { 75 struct test_mbuf_attrs *attrs = ctx->arg; 76 bool ret; 77 struct nl_writer nw = {}; 78 79 ret = nlmsg_get_buf_type_wrapper(&nw, attrs->size, attrs->wtype, attrs->waitok); 80 if (!ret) 81 return (EINVAL); 82 83 int alloc_len = nw.alloc_len; 84 KTEST_LOG(ctx, "requested %u, allocated %d", attrs->size, alloc_len); 85 86 /* Set cleanup callback */ 87 nw.writer_target = NS_WRITER_TARGET_SOCKET; 88 nlmsg_set_callback_wrapper(&nw); 89 90 /* Mark enomem to avoid reallocation */ 91 nw.enomem = true; 92 93 if (nlmsg_reserve_data(&nw, alloc_len, void *) == NULL) { 94 KTEST_LOG(ctx, "unable to get %d bytes from the writer", alloc_len); 95 return (EINVAL); 96 } 97 98 /* Mark as empty to free the storage */ 99 nw.offset = 0; 100 nlmsg_flush(&nw); 101 102 if (alloc_len < attrs->expected_avail) { 103 KTEST_LOG(ctx, "alloc_len %d, expected %u", 104 alloc_len, attrs->expected_avail); 105 return (EINVAL); 106 } 107 108 return (0); 109 } 110 111 static int 112 test_mbuf_chain_allocation(struct ktest_test_context *ctx) 113 { 114 struct test_mbuf_attrs *attrs = ctx->arg; 115 int mflags = attrs->waitok ? M_WAITOK : M_NOWAIT; 116 struct mbuf *chain = nl_get_mbuf_chain_wrapper(attrs->size, mflags); 117 118 if (chain == NULL) { 119 KTEST_LOG(ctx, "nl_get_mbuf_chain(%u) returned NULL", attrs->size); 120 return (EINVAL); 121 } 122 123 /* Iterate and check number of mbufs and space */ 124 uint32_t allocated_count = 0, allocated_size = 0; 125 for (struct mbuf *m = chain; m != NULL; m = m->m_next) { 126 allocated_count++; 127 allocated_size += M_SIZE(m); 128 } 129 m_freem(chain); 130 131 if (attrs->expected_avail > allocated_size) { 132 KTEST_LOG(ctx, "expected/allocated avail(bytes) %u/%u" 133 " expected/allocated count %u/%u", 134 attrs->expected_avail, allocated_size, 135 attrs->expected_count, allocated_count); 136 return (EINVAL); 137 } 138 139 if (attrs->expected_count > 0 && (attrs->expected_count != allocated_count)) { 140 KTEST_LOG(ctx, "expected/allocated avail(bytes) %u/%u" 141 " expected/allocated count %u/%u", 142 attrs->expected_avail, allocated_size, 143 attrs->expected_count, allocated_count); 144 return (EINVAL); 145 } 146 147 return (0); 148 } 149 #endif 150 151 static const struct ktest_test_info tests[] = { 152 #ifdef INVARIANTS 153 { 154 .name = "test_mbuf_writer_allocation", 155 .desc = "test different mbuf sizes in the mbuf writer", 156 .func = &test_mbuf_writer_allocation, 157 .parse = &test_mbuf_parser, 158 }, 159 { 160 .name = "test_mbuf_chain_allocation", 161 .desc = "verify allocation different chain sizes", 162 .func = &test_mbuf_chain_allocation, 163 .parse = &test_mbuf_parser, 164 }, 165 #endif 166 }; 167 KTEST_MODULE_DECLARE(ktest_netlink_message_writer, tests); 168