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_ptr(tcp, tcp->u_arg[1]);
40 return 0;
41 }
42
SYS_FUNC(io_destroy)43 SYS_FUNC(io_destroy)
44 {
45 printaddr(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(struct tcb * tcp,const struct iocb * cb)81 print_common_flags(struct tcb *tcp, 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 tprints(", resfd=");
87 printfd(tcp, cb->aio_resfd);
88 }
89 if (cb->aio_flags & ~IOCB_FLAG_RESFD)
90 tprintf(", flags=%#x", cb->aio_flags);
91 #endif
92 }
93
94 static bool
iocb_is_valid(const struct iocb * cb)95 iocb_is_valid(const struct iocb *cb)
96 {
97 return cb->aio_buf == (unsigned long) cb->aio_buf &&
98 cb->aio_nbytes == (size_t) cb->aio_nbytes &&
99 (ssize_t) cb->aio_nbytes >= 0;
100 }
101
102 static enum iocb_sub
print_iocb_header(struct tcb * tcp,const struct iocb * cb)103 print_iocb_header(struct tcb *tcp, const struct iocb *cb)
104 {
105 enum iocb_sub sub;
106
107 if (cb->aio_data)
108 tprintf("data=%#" PRIx64 ", ",
109 (uint64_t) cb->aio_data);
110
111 if (cb->aio_key)
112 tprintf("key=%u, ", cb->aio_key);
113
114 sub = tprint_lio_opcode(cb->aio_lio_opcode);
115 if (cb->aio_reqprio)
116 tprintf(", reqprio=%hd", cb->aio_reqprio);
117
118 tprints(", fildes=");
119 printfd(tcp, cb->aio_fildes);
120
121 return sub;
122 }
123
124 static void
print_iocb(struct tcb * tcp,const struct iocb * cb)125 print_iocb(struct tcb *tcp, const struct iocb *cb)
126 {
127 enum iocb_sub sub = print_iocb_header(tcp, cb);
128
129 switch (sub) {
130 case SUB_COMMON:
131 if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
132 tprints(", str=");
133 printstrn(tcp, cb->aio_buf, cb->aio_nbytes);
134 } else {
135 tprintf(", buf=%#" PRIx64, (uint64_t) cb->aio_buf);
136 }
137 tprintf(", nbytes=%" PRIu64 ", offset=%" PRId64,
138 (uint64_t) cb->aio_nbytes, (int64_t) cb->aio_offset);
139 print_common_flags(tcp, cb);
140 break;
141 case SUB_VECTOR:
142 if (iocb_is_valid(cb)) {
143 tprints(", iovec=");
144 tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
145 cb->aio_lio_opcode == 8
146 ? IOV_DECODE_STR
147 : IOV_DECODE_ADDR);
148 } else {
149 tprintf(", buf=%#" PRIx64 ", nbytes=%" PRIu64,
150 (uint64_t) cb->aio_buf,
151 (uint64_t) cb->aio_nbytes);
152 }
153 tprintf(", offset=%" PRId64, (int64_t) cb->aio_offset);
154 print_common_flags(tcp, cb);
155 break;
156 case SUB_NONE:
157 break;
158 }
159 }
160
161 static bool
print_iocbp(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)162 print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
163 {
164 kernel_ulong_t addr;
165 struct iocb cb;
166
167 if (elem_size < sizeof(kernel_ulong_t)) {
168 addr = * (unsigned int *) elem_buf;
169 } else {
170 addr = * (kernel_ulong_t *) elem_buf;
171 }
172
173 tprints("{");
174 if (!umove_or_printaddr(tcp, addr, &cb))
175 print_iocb(tcp, &cb);
176 tprints("}");
177
178 return true;
179 }
180
SYS_FUNC(io_submit)181 SYS_FUNC(io_submit)
182 {
183 const kernel_long_t nr =
184 truncate_klong_to_current_wordsize(tcp->u_arg[1]);
185 const kernel_ulong_t addr = tcp->u_arg[2];
186 kernel_ulong_t iocbp;
187
188 printaddr(tcp->u_arg[0]);
189 tprintf(", %" PRI_kld ", ", nr);
190
191 if (nr < 0)
192 printaddr(addr);
193 else
194 print_array(tcp, addr, nr, &iocbp, current_wordsize,
195 umoven_or_printaddr, print_iocbp, 0);
196
197 return RVAL_DECODED;
198 }
199
200 static bool
print_io_event(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)201 print_io_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
202 {
203 struct io_event *event = elem_buf;
204
205 tprintf("{data=%#" PRIx64 ", obj=%#" PRIx64
206 ", res=%" PRId64 ", res2=%" PRId64 "}",
207 (uint64_t) event->data, (uint64_t) event->obj,
208 (int64_t) event->res, (int64_t) event->res2);
209
210 return true;
211 }
212
SYS_FUNC(io_cancel)213 SYS_FUNC(io_cancel)
214 {
215 if (entering(tcp)) {
216 printaddr(tcp->u_arg[0]);
217 tprints(", ");
218
219 struct iocb cb;
220
221 if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
222 tprints("{");
223 print_iocb_header(tcp, &cb);
224 tprints("}");
225 }
226 tprints(", ");
227 } else {
228 struct io_event event;
229
230 if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
231 print_io_event(tcp, &event, sizeof(event), 0);
232 }
233 return 0;
234 }
235
SYS_FUNC(io_getevents)236 SYS_FUNC(io_getevents)
237 {
238 if (entering(tcp)) {
239 printaddr(tcp->u_arg[0]);
240 tprintf(", %" PRI_kld ", %" PRI_kld ", ",
241 truncate_klong_to_current_wordsize(tcp->u_arg[1]),
242 truncate_klong_to_current_wordsize(tcp->u_arg[2]));
243 } else {
244 struct io_event buf;
245 print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
246 umoven_or_printaddr, print_io_event, 0);
247 tprints(", ");
248 /*
249 * Since the timeout parameter is read by the kernel
250 * on entering syscall, it has to be decoded the same way
251 * whether the syscall has failed or not.
252 */
253 temporarily_clear_syserror(tcp);
254 print_timespec(tcp, tcp->u_arg[4]);
255 restore_cleared_syserror(tcp);
256 }
257 return 0;
258 }
259