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) 1999-2018 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 "print_fields.h"
34 #include <linux/aio_abi.h>
35
36 #include "xlat/aio_cmds.h"
37
SYS_FUNC(io_setup)38 SYS_FUNC(io_setup)
39 {
40 if (entering(tcp))
41 tprintf("%u, ", (unsigned int) tcp->u_arg[0]);
42 else
43 printnum_ptr(tcp, tcp->u_arg[1]);
44 return 0;
45 }
46
SYS_FUNC(io_destroy)47 SYS_FUNC(io_destroy)
48 {
49 printaddr(tcp->u_arg[0]);
50
51 return RVAL_DECODED;
52 }
53
54 enum iocb_sub {
55 SUB_NONE, SUB_COMMON, SUB_VECTOR
56 };
57
58 static enum iocb_sub
tprint_lio_opcode(unsigned int cmd)59 tprint_lio_opcode(unsigned int cmd)
60 {
61 static const enum iocb_sub subs[] = {
62 [IOCB_CMD_PREAD] = SUB_COMMON,
63 [IOCB_CMD_PWRITE] = SUB_COMMON,
64 [IOCB_CMD_FSYNC] = SUB_NONE,
65 [IOCB_CMD_FDSYNC] = SUB_NONE,
66 [IOCB_CMD_PREADX] = SUB_NONE,
67 [IOCB_CMD_POLL] = SUB_NONE,
68 [IOCB_CMD_NOOP] = SUB_NONE,
69 [IOCB_CMD_PREADV] = SUB_VECTOR,
70 [IOCB_CMD_PWRITEV] = SUB_VECTOR,
71 };
72
73 printxval_indexn_ex(ARRSZ_PAIR(aio_cmds), cmd, "IOCB_CMD_???",
74 XLAT_STYLE_FMT_U);
75
76 return cmd < ARRAY_SIZE(subs) ? subs[cmd] : SUB_NONE;
77 }
78
79 static void
print_common_flags(struct tcb * tcp,const struct iocb * cb)80 print_common_flags(struct tcb *tcp, const struct iocb *cb)
81 {
82 /* IOCB_FLAG_RESFD is available since v2.6.22-rc1~47 */
83 #ifdef IOCB_FLAG_RESFD
84 if (cb->aio_flags & IOCB_FLAG_RESFD)
85 PRINT_FIELD_FD(", ", *cb, aio_resfd, tcp);
86
87 if (cb->aio_flags & ~IOCB_FLAG_RESFD)
88 PRINT_FIELD_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(struct tcb * tcp,const struct iocb * cb)101 print_iocb_header(struct tcb *tcp, const struct iocb *cb)
102 {
103 enum iocb_sub sub;
104
105 if (cb->aio_data){
106 PRINT_FIELD_X("", *cb, aio_data);
107 tprints(", ");
108 }
109
110 if (cb->aio_key) {
111 PRINT_FIELD_U("", *cb, aio_key);
112 tprints(", ");
113 }
114
115 tprints("aio_lio_opcode=");
116 sub = tprint_lio_opcode(cb->aio_lio_opcode);
117 if (cb->aio_reqprio)
118 PRINT_FIELD_D(", ", *cb, aio_reqprio);
119
120 PRINT_FIELD_FD(", ", *cb, aio_fildes, tcp);
121
122 return sub;
123 }
124
125 static void
print_iocb(struct tcb * tcp,const struct iocb * cb)126 print_iocb(struct tcb *tcp, const struct iocb *cb)
127 {
128 tprints("{");
129
130 enum iocb_sub sub = print_iocb_header(tcp, cb);
131
132 switch (sub) {
133 case SUB_COMMON:
134 if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
135 PRINT_FIELD_STRN(", ", *cb, aio_buf,
136 cb->aio_nbytes, tcp);
137 } else {
138 PRINT_FIELD_X(", ", *cb, aio_buf);
139 }
140 PRINT_FIELD_U(", ", *cb, aio_nbytes);
141 PRINT_FIELD_D(", ", *cb, aio_offset);
142 print_common_flags(tcp, cb);
143 break;
144 case SUB_VECTOR:
145 if (iocb_is_valid(cb)) {
146 tprints(", aio_buf=");
147 tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
148 cb->aio_lio_opcode == 8
149 ? IOV_DECODE_STR
150 : IOV_DECODE_ADDR);
151 } else {
152 PRINT_FIELD_X(", ", *cb, aio_buf);
153 PRINT_FIELD_U(", ", *cb, aio_nbytes);
154 }
155 PRINT_FIELD_D(", ", *cb, aio_offset);
156 print_common_flags(tcp, cb);
157 break;
158 case SUB_NONE:
159 break;
160 }
161
162 tprints("}");
163 }
164
165 static bool
print_iocbp(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)166 print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
167 {
168 kernel_ulong_t addr;
169 struct iocb cb;
170
171 if (elem_size < sizeof(kernel_ulong_t)) {
172 addr = *(unsigned int *) elem_buf;
173 } else {
174 addr = *(kernel_ulong_t *) elem_buf;
175 }
176
177 if (!umove_or_printaddr(tcp, addr, &cb))
178 print_iocb(tcp, &cb);
179
180 return true;
181 }
182
SYS_FUNC(io_submit)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 tfetch_mem, print_iocbp, 0);
198
199 return RVAL_DECODED;
200 }
201
202 static bool
print_io_event(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)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 PRINT_FIELD_X("{", *event, data);
208 PRINT_FIELD_X(", ", *event, obj);
209 PRINT_FIELD_D(", ", *event, res);
210 PRINT_FIELD_D(", ", *event, res2);
211 tprints("}");
212
213 return true;
214 }
215
SYS_FUNC(io_cancel)216 SYS_FUNC(io_cancel)
217 {
218 if (entering(tcp)) {
219 printaddr(tcp->u_arg[0]);
220 tprints(", ");
221
222 struct iocb cb;
223
224 if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
225 tprints("{");
226 print_iocb_header(tcp, &cb);
227 tprints("}");
228 }
229 tprints(", ");
230 } else {
231 struct io_event event;
232
233 if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
234 print_io_event(tcp, &event, sizeof(event), 0);
235 }
236 return 0;
237 }
238
239 static int
print_io_getevents(struct tcb * tcp,bool has_usig)240 print_io_getevents(struct tcb *tcp, bool has_usig)
241 {
242 if (entering(tcp)) {
243 printaddr(tcp->u_arg[0]);
244 tprintf(", %" PRI_kld ", %" PRI_kld ", ",
245 truncate_klong_to_current_wordsize(tcp->u_arg[1]),
246 truncate_klong_to_current_wordsize(tcp->u_arg[2]));
247 } else {
248 struct io_event buf;
249 print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
250 tfetch_mem, print_io_event, 0);
251 tprints(", ");
252 /*
253 * Since the timeout and usig parameters are read by the kernel
254 * on entering syscall, it has to be decoded the same way
255 * whether the syscall has failed or not.
256 */
257 temporarily_clear_syserror(tcp);
258 print_timespec(tcp, tcp->u_arg[4]);
259 if (has_usig) {
260 tprints(", ");
261 print_aio_sigset(tcp, tcp->u_arg[5]);
262 }
263 restore_cleared_syserror(tcp);
264 }
265 return 0;
266 }
267
SYS_FUNC(io_getevents)268 SYS_FUNC(io_getevents)
269 {
270 return print_io_getevents(tcp, false);
271 }
272
SYS_FUNC(io_pgetevents)273 SYS_FUNC(io_pgetevents)
274 {
275 return print_io_getevents(tcp, true);
276 }
277