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tests: check decoding of netlink smc_diag_msg attributes
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1 /*
2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6  * Copyright (c) 1999-2017 The strace developers.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. The name of the author may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31
32 #include "defs.h"
33 #include <linux/aio_abi.h>
34
35 SYS_FUNC(io_setup)
36 {
37         if (entering(tcp))
38                 tprintf("%u, ", (unsigned int) tcp->u_arg[0]);
39         else
40                 printnum_ptr(tcp, tcp->u_arg[1]);
41         return 0;
42 }
43
44 SYS_FUNC(io_destroy)
45 {
46         printaddr(tcp->u_arg[0]);
47
48         return RVAL_DECODED;
49 }
50
51 enum iocb_sub {
52         SUB_NONE, SUB_COMMON, SUB_VECTOR
53 };
54
55 static enum iocb_sub
56 tprint_lio_opcode(unsigned cmd)
57 {
58         static const struct {
59                 const char *name;
60                 enum iocb_sub sub;
61         } cmds[] = {
62                 { "pread", SUB_COMMON },
63                 { "pwrite", SUB_COMMON },
64                 { "fsync", SUB_NONE },
65                 { "fdsync", SUB_NONE },
66                 { "preadx", SUB_NONE },
67                 { "poll", SUB_NONE },
68                 { "noop", SUB_NONE },
69                 { "preadv", SUB_VECTOR },
70                 { "pwritev", SUB_VECTOR },
71         };
72
73         if (cmd < ARRAY_SIZE(cmds)) {
74                 tprints(cmds[cmd].name);
75                 return cmds[cmd].sub;
76         }
77         tprintf("%u", cmd);
78         tprints_comment("SUB_???");
79         return SUB_NONE;
80 }
81
82 static void
83 print_common_flags(struct tcb *tcp, const struct iocb *cb)
84 {
85 /* IOCB_FLAG_RESFD is available since v2.6.22-rc1~47 */
86 #ifdef IOCB_FLAG_RESFD
87         if (cb->aio_flags & IOCB_FLAG_RESFD) {
88                 tprints(", resfd=");
89                 printfd(tcp, cb->aio_resfd);
90         }
91         if (cb->aio_flags & ~IOCB_FLAG_RESFD)
92                 tprintf(", flags=%#x", cb->aio_flags);
93 #endif
94 }
95
96 static bool
97 iocb_is_valid(const struct iocb *cb)
98 {
99         return cb->aio_buf == (unsigned long) cb->aio_buf &&
100                cb->aio_nbytes == (size_t) cb->aio_nbytes &&
101                (ssize_t) cb->aio_nbytes >= 0;
102 }
103
104 static enum iocb_sub
105 print_iocb_header(struct tcb *tcp, const struct iocb *cb)
106 {
107         enum iocb_sub sub;
108
109         if (cb->aio_data)
110                 tprintf("data=%#" PRIx64 ", ",
111                         (uint64_t) cb->aio_data);
112
113         if (cb->aio_key)
114                 tprintf("key=%u, ", cb->aio_key);
115
116         sub = tprint_lio_opcode(cb->aio_lio_opcode);
117         if (cb->aio_reqprio)
118                 tprintf(", reqprio=%hd", cb->aio_reqprio);
119
120         tprints(", fildes=");
121         printfd(tcp, cb->aio_fildes);
122
123         return sub;
124 }
125
126 static void
127 print_iocb(struct tcb *tcp, const struct iocb *cb)
128 {
129         enum iocb_sub sub = print_iocb_header(tcp, cb);
130
131         switch (sub) {
132         case SUB_COMMON:
133                 if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
134                         tprints(", str=");
135                         printstrn(tcp, cb->aio_buf, cb->aio_nbytes);
136                 } else {
137                         tprintf(", buf=%#" PRIx64, (uint64_t) cb->aio_buf);
138                 }
139                 tprintf(", nbytes=%" PRIu64 ", offset=%" PRId64,
140                         (uint64_t) cb->aio_nbytes, (int64_t) cb->aio_offset);
141                 print_common_flags(tcp, cb);
142                 break;
143         case SUB_VECTOR:
144                 if (iocb_is_valid(cb)) {
145                         tprints(", iovec=");
146                         tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
147                                    cb->aio_lio_opcode == 8
148                                    ? IOV_DECODE_STR
149                                    : IOV_DECODE_ADDR);
150                 } else {
151                         tprintf(", buf=%#" PRIx64 ", nbytes=%" PRIu64,
152                                 (uint64_t) cb->aio_buf,
153                                 (uint64_t) cb->aio_nbytes);
154                 }
155                 tprintf(", offset=%" PRId64, (int64_t) cb->aio_offset);
156                 print_common_flags(tcp, cb);
157                 break;
158         case SUB_NONE:
159                 break;
160         }
161 }
162
163 static bool
164 print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
165 {
166         kernel_ulong_t addr;
167         struct iocb cb;
168
169         if (elem_size < sizeof(kernel_ulong_t)) {
170                 addr = *(unsigned int *) elem_buf;
171         } else {
172                 addr = *(kernel_ulong_t *) elem_buf;
173         }
174
175         tprints("{");
176         if (!umove_or_printaddr(tcp, addr, &cb))
177                 print_iocb(tcp, &cb);
178         tprints("}");
179
180         return true;
181 }
182
183 SYS_FUNC(io_submit)
184 {
185         const kernel_long_t nr =
186                 truncate_klong_to_current_wordsize(tcp->u_arg[1]);
187         const kernel_ulong_t addr = tcp->u_arg[2];
188         kernel_ulong_t iocbp;
189
190         printaddr(tcp->u_arg[0]);
191         tprintf(", %" PRI_kld ", ", nr);
192
193         if (nr < 0)
194                 printaddr(addr);
195         else
196                 print_array(tcp, addr, nr, &iocbp, current_wordsize,
197                             umoven_or_printaddr, print_iocbp, 0);
198
199         return RVAL_DECODED;
200 }
201
202 static bool
203 print_io_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
204 {
205         struct io_event *event = elem_buf;
206
207         tprintf("{data=%#" PRIx64 ", obj=%#" PRIx64
208                 ", res=%" PRId64 ", res2=%" PRId64 "}",
209                 (uint64_t) event->data, (uint64_t) event->obj,
210                 (int64_t) event->res, (int64_t) event->res2);
211
212         return true;
213 }
214
215 SYS_FUNC(io_cancel)
216 {
217         if (entering(tcp)) {
218                 printaddr(tcp->u_arg[0]);
219                 tprints(", ");
220
221                 struct iocb cb;
222
223                 if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
224                         tprints("{");
225                         print_iocb_header(tcp, &cb);
226                         tprints("}");
227                 }
228                 tprints(", ");
229         } else {
230                 struct io_event event;
231
232                 if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
233                         print_io_event(tcp, &event, sizeof(event), 0);
234         }
235         return 0;
236 }
237
238 SYS_FUNC(io_getevents)
239 {
240         if (entering(tcp)) {
241                 printaddr(tcp->u_arg[0]);
242                 tprintf(", %" PRI_kld ", %" PRI_kld ", ",
243                         truncate_klong_to_current_wordsize(tcp->u_arg[1]),
244                         truncate_klong_to_current_wordsize(tcp->u_arg[2]));
245         } else {
246                 struct io_event buf;
247                 print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
248                             umoven_or_printaddr, print_io_event, 0);
249                 tprints(", ");
250                 /*
251                  * Since the timeout parameter is read by the kernel
252                  * on entering syscall, it has to be decoded the same way
253                  * whether the syscall has failed or not.
254                  */
255                 temporarily_clear_syserror(tcp);
256                 print_timespec(tcp, tcp->u_arg[4]);
257                 restore_cleared_syserror(tcp);
258         }
259         return 0;
260 }