1 /*
2 * Copyright (c) 2012 The Chromium OS Authors.
3 * Written by Mike Frysinger <vapier@gentoo.org>.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "defs.h"
29 #include <linux/ioctl.h>
30 #include <linux/loop.h>
31
32 #include "xlat/loop_flags_options.h"
33 #include "xlat/loop_crypt_type_options.h"
34
35 static void
decode_loop_info(struct tcb * tcp,const long addr)36 decode_loop_info(struct tcb *tcp, const long addr)
37 {
38 struct loop_info info;
39
40 tprints(", ");
41 if (umove_or_printaddr(tcp, addr, &info))
42 return;
43
44 tprintf("{number=%d", info.lo_number);
45
46 if (!abbrev(tcp)) {
47 tprintf(", device=%#lx, inode=%lu, rdevice=%#lx",
48 (unsigned long) info.lo_device,
49 info.lo_inode,
50 (unsigned long) info.lo_rdevice);
51 }
52
53 tprintf(", offset=%#x", info.lo_offset);
54
55 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
56 tprints(", encrypt_type=");
57 printxval(loop_crypt_type_options, info.lo_encrypt_type,
58 "LO_CRYPT_???");
59 tprintf(", encrypt_key_size=%d", info.lo_encrypt_key_size);
60 }
61
62 tprints(", flags=");
63 printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
64
65 tprints(", name=");
66 print_quoted_string(info.lo_name, LO_NAME_SIZE,
67 QUOTE_0_TERMINATED);
68
69 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
70 tprints(", encrypt_key=");
71 print_quoted_string((void *) info.lo_encrypt_key,
72 LO_KEY_SIZE, 0);
73 }
74
75 if (!abbrev(tcp))
76 tprintf(", init={%#lx, %#lx}"
77 ", reserved={%#x, %#x, %#x, %#x}}",
78 info.lo_init[0], info.lo_init[1],
79 info.reserved[0], info.reserved[1],
80 info.reserved[2], info.reserved[3]);
81 else
82 tprints(", ...}");
83 }
84
85 static void
decode_loop_info64(struct tcb * tcp,const long addr)86 decode_loop_info64(struct tcb *tcp, const long addr)
87 {
88 struct loop_info64 info64;
89
90 tprints(", ");
91 if (umove_or_printaddr(tcp, addr, &info64))
92 return;
93
94 if (!abbrev(tcp)) {
95 tprintf("{device=%" PRIu64 ", inode=%" PRIu64 ", "
96 "rdevice=%" PRIu64 ", offset=%#" PRIx64 ", "
97 "sizelimit=%" PRIu64 ", number=%" PRIu32,
98 (uint64_t) info64.lo_device,
99 (uint64_t) info64.lo_inode,
100 (uint64_t) info64.lo_rdevice,
101 (uint64_t) info64.lo_offset,
102 (uint64_t) info64.lo_sizelimit,
103 (uint32_t) info64.lo_number);
104 } else {
105 tprintf("{offset=%#" PRIx64 ", number=%" PRIu32,
106 (uint64_t) info64.lo_offset,
107 (uint32_t) info64.lo_number);
108 }
109
110 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
111 tprints(", encrypt_type=");
112 printxval(loop_crypt_type_options, info64.lo_encrypt_type,
113 "LO_CRYPT_???");
114 tprintf(", encrypt_key_size=%" PRIu32,
115 info64.lo_encrypt_key_size);
116 }
117
118 tprints(", flags=");
119 printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
120
121 tprints(", file_name=");
122 print_quoted_string((void *) info64.lo_file_name,
123 LO_NAME_SIZE, QUOTE_0_TERMINATED);
124
125 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
126 tprints(", crypt_name=");
127 print_quoted_string((void *) info64.lo_crypt_name,
128 LO_NAME_SIZE, QUOTE_0_TERMINATED);
129 tprints(", encrypt_key=");
130 print_quoted_string((void *) info64.lo_encrypt_key,
131 LO_KEY_SIZE, 0);
132 }
133
134 if (!abbrev(tcp))
135 tprintf(", init={%#" PRIx64 ", %#" PRIx64 "}}",
136 (uint64_t) info64.lo_init[0],
137 (uint64_t) info64.lo_init[1]);
138 else
139 tprints(", ...}");
140 }
141
142 int
loop_ioctl(struct tcb * tcp,const unsigned int code,long arg)143 loop_ioctl(struct tcb *tcp, const unsigned int code, long arg)
144 {
145 if (!verbose(tcp))
146 return RVAL_DECODED;
147
148 switch (code) {
149 case LOOP_SET_STATUS:
150 decode_loop_info(tcp, arg);
151 break;
152
153 case LOOP_GET_STATUS:
154 if (entering(tcp))
155 return 0;
156 decode_loop_info(tcp, arg);
157 break;
158
159 case LOOP_SET_STATUS64:
160 decode_loop_info64(tcp, arg);
161 break;
162
163 case LOOP_GET_STATUS64:
164 if (entering(tcp))
165 return 0;
166 decode_loop_info64(tcp, arg);
167 break;
168
169 case LOOP_CLR_FD:
170 #ifdef LOOP_SET_CAPACITY
171 case LOOP_SET_CAPACITY:
172 #endif
173 #ifdef LOOP_CTL_GET_FREE
174 /* newer loop-control stuff */
175 case LOOP_CTL_GET_FREE:
176 #endif
177 /* Takes no arguments */
178 break;
179
180 case LOOP_SET_FD:
181 case LOOP_CHANGE_FD:
182 tprints(", ");
183 printfd(tcp, arg);
184 break;
185
186 #ifdef LOOP_CTL_ADD
187 /* newer loop-control stuff */
188 case LOOP_CTL_ADD:
189 case LOOP_CTL_REMOVE:
190 tprintf(", %d", (int) arg);
191 break;
192 #endif
193
194 default:
195 return RVAL_DECODED;
196 }
197
198 return RVAL_DECODED | 1;
199 }
200