1 /*
2 * Copyright (c) 2009, 2010 Jeff Mahoney <jeffm@suse.com>
3 * Copyright (c) 2011-2016 Dmitry V. Levin <ldv@altlinux.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "defs.h"
30
31 #include DEF_MPERS_TYPE(struct_blk_user_trace_setup)
32 #include DEF_MPERS_TYPE(struct_blkpg_ioctl_arg)
33 #include DEF_MPERS_TYPE(struct_blkpg_partition)
34
35 #include <linux/ioctl.h>
36 #include <linux/fs.h>
37
38 typedef struct {
39 int op;
40 int flags;
41 int datalen;
42 void *data;
43 } struct_blkpg_ioctl_arg;
44
45 #define BLKPG_DEVNAMELTH 64
46 #define BLKPG_VOLNAMELTH 64
47 typedef struct {
48 int64_t start; /* starting offset in bytes */
49 int64_t length; /* length in bytes */
50 int pno; /* partition number */
51 char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2,
52 to be used in kernel messages */
53 char volname[BLKPG_VOLNAMELTH]; /* volume label */
54 } struct_blkpg_partition;
55
56 #define BLKTRACE_BDEV_SIZE 32
57 typedef struct blk_user_trace_setup {
58 char name[BLKTRACE_BDEV_SIZE]; /* output */
59 uint16_t act_mask; /* input */
60 uint32_t buf_size; /* input */
61 uint32_t buf_nr; /* input */
62 uint64_t start_lba;
63 uint64_t end_lba;
64 uint32_t pid;
65 } struct_blk_user_trace_setup;
66
67 #include MPERS_DEFS
68
69 #ifndef BLKPG
70 # define BLKPG _IO(0x12,105)
71 #endif
72
73 /*
74 * ioctl numbers <= 114 are present in Linux 2.4. The following ones have been
75 * added since then and headers containing them may not be available on every
76 * system.
77 */
78
79 #ifndef BLKTRACESETUP
80 # define BLKTRACESETUP _IOWR(0x12, 115, struct_blk_user_trace_setup)
81 #endif
82 #ifndef BLKTRACESTART
83 # define BLKTRACESTART _IO(0x12,116)
84 #endif
85 #ifndef BLKTRACESTOP
86 # define BLKTRACESTOP _IO(0x12,117)
87 #endif
88 #ifndef BLKTRACETEARDOWN
89 # define BLKTRACETEARDOWN _IO(0x12,118)
90 #endif
91 #ifndef BLKDISCARD
92 # define BLKDISCARD _IO(0x12,119)
93 #endif
94 #ifndef BLKIOMIN
95 # define BLKIOMIN _IO(0x12,120)
96 #endif
97 #ifndef BLKIOOPT
98 # define BLKIOOPT _IO(0x12,121)
99 #endif
100 #ifndef BLKALIGNOFF
101 # define BLKALIGNOFF _IO(0x12,122)
102 #endif
103 #ifndef BLKPBSZGET
104 # define BLKPBSZGET _IO(0x12,123)
105 #endif
106 #ifndef BLKDISCARDZEROES
107 # define BLKDISCARDZEROES _IO(0x12,124)
108 #endif
109 #ifndef BLKSECDISCARD
110 # define BLKSECDISCARD _IO(0x12,125)
111 #endif
112 #ifndef BLKROTATIONAL
113 # define BLKROTATIONAL _IO(0x12,126)
114 #endif
115 #ifndef BLKZEROOUT
116 # define BLKZEROOUT _IO(0x12,127)
117 #endif
118
119 #include "xlat/blkpg_ops.h"
120
121 static void
print_blkpg_req(struct tcb * tcp,const struct_blkpg_ioctl_arg * blkpg)122 print_blkpg_req(struct tcb *tcp, const struct_blkpg_ioctl_arg *blkpg)
123 {
124 struct_blkpg_partition p;
125
126 tprints("{");
127 printxval(blkpg_ops, blkpg->op, "BLKPG_???");
128
129 tprintf(", flags=%d, datalen=%d, data=",
130 blkpg->flags, blkpg->datalen);
131
132 if (!umove_or_printaddr(tcp, ptr_to_kulong(blkpg->data), &p)) {
133 tprintf("{start=%" PRId64 ", length=%" PRId64
134 ", pno=%d, devname=",
135 p.start, p.length, p.pno);
136 print_quoted_string(p.devname, sizeof(p.devname),
137 QUOTE_0_TERMINATED);
138 tprints(", volname=");
139 print_quoted_string(p.volname, sizeof(p.volname),
140 QUOTE_0_TERMINATED);
141 tprints("}");
142 }
143 tprints("}");
144 }
145
MPERS_PRINTER_DECL(int,block_ioctl,struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg)146 MPERS_PRINTER_DECL(int, block_ioctl, struct tcb *const tcp,
147 const unsigned int code, const kernel_ulong_t arg)
148 {
149 switch (code) {
150 /* take arg as a value, not as a pointer */
151 case BLKRASET:
152 case BLKFRASET:
153 tprintf(", %" PRI_klu, arg);
154 break;
155
156 /* return an unsigned short */
157 case BLKSECTGET:
158 case BLKROTATIONAL:
159 if (entering(tcp))
160 return 0;
161 tprints(", ");
162 printnum_short(tcp, arg, "%hu");
163 break;
164
165 /* return a signed int */
166 case BLKROGET:
167 case BLKBSZGET:
168 case BLKSSZGET:
169 case BLKALIGNOFF:
170 if (entering(tcp))
171 return 0;
172 /* fall through */
173 /* take a signed int */
174 case BLKROSET:
175 case BLKBSZSET:
176 tprints(", ");
177 printnum_int(tcp, arg, "%d");
178 break;
179
180 /* return an unsigned int */
181 case BLKPBSZGET:
182 case BLKIOMIN:
183 case BLKIOOPT:
184 case BLKDISCARDZEROES:
185 if (entering(tcp))
186 return 0;
187 tprints(", ");
188 printnum_int(tcp, arg, "%u");
189 break;
190
191 /* return a signed long */
192 case BLKRAGET:
193 case BLKFRAGET:
194 if (entering(tcp))
195 return 0;
196 tprints(", ");
197 printnum_slong(tcp, arg);
198 break;
199
200 /* returns an unsigned long */
201 case BLKGETSIZE:
202 if (entering(tcp))
203 return 0;
204 tprints(", ");
205 printnum_ulong(tcp, arg);
206 break;
207
208 #ifdef HAVE_BLKGETSIZE64
209 /* returns an uint64_t */
210 case BLKGETSIZE64:
211 if (entering(tcp))
212 return 0;
213 tprints(", ");
214 printnum_int64(tcp, arg, "%" PRIu64);
215 break;
216 #endif
217
218 /* takes a pair of uint64_t */
219 case BLKDISCARD:
220 case BLKSECDISCARD:
221 case BLKZEROOUT:
222 tprints(", ");
223 printpair_int64(tcp, arg, "%" PRIu64);
224 break;
225
226 /* More complex types */
227 case BLKPG: {
228 struct_blkpg_ioctl_arg blkpg;
229
230 tprints(", ");
231 if (!umove_or_printaddr(tcp, arg, &blkpg))
232 print_blkpg_req(tcp, &blkpg);
233 break;
234 }
235
236 case BLKTRACESETUP:
237 if (entering(tcp)) {
238 struct_blk_user_trace_setup buts;
239
240 tprints(", ");
241 if (umove_or_printaddr(tcp, arg, &buts))
242 break;
243 tprintf("{act_mask=%u, buf_size=%u, "
244 "buf_nr=%u, start_lba=%" PRIu64 ", "
245 "end_lba=%" PRIu64 ", pid=%u",
246 (unsigned)buts.act_mask, buts.buf_size,
247 buts.buf_nr, buts.start_lba,
248 buts.end_lba, buts.pid);
249 return 1;
250 } else {
251 struct_blk_user_trace_setup buts;
252
253 if (!syserror(tcp) && !umove(tcp, arg, &buts)) {
254 tprints(", name=");
255 print_quoted_string(buts.name, sizeof(buts.name),
256 QUOTE_0_TERMINATED);
257 }
258 tprints("}");
259 break;
260 }
261
262 /* No arguments */
263 case BLKRRPART:
264 case BLKFLSBUF:
265 case BLKTRACESTART:
266 case BLKTRACESTOP:
267 case BLKTRACETEARDOWN:
268 break;
269 default:
270 return RVAL_DECODED;
271 }
272
273 return RVAL_DECODED | 1;
274 }
275