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