1 /*
2 * Copyright (c) 2009, 2010 Jeff Mahoney <jeffm@suse.com>
3 * All rights reserved.
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 #ifdef LINUX
30 #include <stdint.h>
31 #include <inttypes.h>
32 #include <linux/blkpg.h>
33 #include <linux/fs.h>
34 #include <linux/hdreg.h>
35
36 /* ioctls <= 114 are present in Linux 2.4. The following ones have been
37 * added since then and headers containing them may not be available on
38 * every system. */
39
40 #define BLKTRACE_BDEV_SIZE 32
41 struct blk_user_trace_setup {
42 char name[BLKTRACE_BDEV_SIZE]; /* output */
43 uint16_t act_mask; /* input */
44 uint32_t buf_size; /* input */
45 uint32_t buf_nr; /* input */
46 uint64_t start_lba;
47 uint64_t end_lba;
48 uint32_t pid;
49 };
50
51 #ifndef BLKTRACESETUP
52 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
53 #endif
54 #ifndef BLKTRACESTART
55 #define BLKTRACESTART _IO(0x12,116)
56 #endif
57 #ifndef BLKTRACESTART
58 #define BLKTRACESTOP _IO(0x12,117)
59 #endif
60 #ifndef BLKTRACETEARDOWN
61 #define BLKTRACETEARDOWN _IO(0x12,118)
62 #endif
63 #ifndef BLKDISCARD
64 #define BLKDISCARD _IO(0x12,119)
65 #endif
66 #ifndef BLKIOMIN
67 #define BLKIOMIN _IO(0x12,120)
68 #endif
69 #ifndef BLKIOOPT
70 #define BLKIOOPT _IO(0x12,121)
71 #endif
72 #ifndef BLKALIGNOFF
73 #define BLKALIGNOFF _IO(0x12,122)
74 #endif
75 #ifndef BLKPBSZGET
76 #define BLKPBSZGET _IO(0x12,123)
77 #endif
78 #ifndef BLKDISCARDZEROES
79 #define BLKDISCARDZEROES _IO(0x12,124)
80 #endif
81 #ifndef BLKSECDISCARD
82 #define BLKSECDISCARD _IO(0x12,125)
83 #endif
84
85 static const struct xlat blkpg_ops[] = {
86 { BLKPG_ADD_PARTITION, "BLKPG_ADD_PARTITION", },
87 { BLKPG_DEL_PARTITION, "BLKPG_DEL_PARTITION", },
88 { 0, NULL },
89 };
90
91 static void
print_blkpg_req(struct tcb * tcp,struct blkpg_ioctl_arg * blkpg)92 print_blkpg_req(struct tcb *tcp, struct blkpg_ioctl_arg *blkpg)
93 {
94 struct blkpg_partition p;
95
96 tprintf("{");
97 printxval(blkpg_ops, blkpg->op, "BLKPG_???");
98
99 tprintf(", flags=%d, datalen=%d, ",
100 blkpg->flags, blkpg->datalen);
101
102 if (umove(tcp, (long) blkpg->data, &p) < 0)
103 tprintf("%#lx}", (long) blkpg->data);
104 else
105 tprintf("{start=%lld, length=%lld, pno=%d, "
106 "devname=\"%.*s\", volname=\"%.*s\"}}",
107 p.start, p.length, p.pno,
108 (int) sizeof(p.devname), p.devname,
109 (int) sizeof(p.volname), p.volname);
110 }
111
112 int
block_ioctl(struct tcb * tcp,long code,long arg)113 block_ioctl(struct tcb *tcp, long code, long arg)
114 {
115 switch (code) {
116 /* take arg as a value, not as a pointer */
117 case BLKRASET:
118 case BLKFRASET:
119 if (entering(tcp))
120 tprintf(", %ld", arg);
121 break;
122
123 /* take a signed int */
124 case BLKROSET:
125 case BLKBSZSET:
126 if (entering(tcp)) {
127 int val;
128 if (umove(tcp, arg, &val) < 0)
129 tprintf(", %#lx", arg);
130 else
131 tprintf(", %d", val);
132 }
133 break;
134
135 /* returns an unsigned short */
136 case BLKSECTGET:
137 if (exiting(tcp)) {
138 unsigned short val;
139 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
140 tprintf(", %#lx", arg);
141 else
142 tprintf(", %hu", val);
143 }
144 break;
145
146 /* return a signed int */
147 case BLKROGET:
148 case BLKBSZGET:
149 case BLKSSZGET:
150 case BLKALIGNOFF:
151 if (exiting(tcp)) {
152 int val;
153 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
154 tprintf(", %#lx", arg);
155 else
156 tprintf(", %d", val);
157 }
158 break;
159
160 /* return an unsigned int */
161 case BLKPBSZGET:
162 case BLKIOMIN:
163 case BLKIOOPT:
164 case BLKDISCARDZEROES:
165 if (exiting(tcp)) {
166 unsigned int val;
167 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
168 tprintf(", %#lx", arg);
169 else
170 tprintf(", %u", val);
171 }
172 break;
173
174 /* return a signed long */
175 case BLKRAGET:
176 case BLKFRAGET:
177 if (exiting(tcp)) {
178 long val;
179 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
180 tprintf(", %#lx", arg);
181 else
182 tprintf(", %ld", val);
183 }
184 break;
185
186 /* returns an unsigned long */
187 case BLKGETSIZE:
188 if (exiting(tcp)) {
189 unsigned long val;
190 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
191 tprintf(", %#lx", arg);
192 else
193 tprintf(", %lu", val);
194 }
195 break;
196
197 /* return an uint64_t */
198 case BLKGETSIZE64:
199 if (exiting(tcp)) {
200 uint64_t val;
201 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
202 tprintf(", %#lx", arg);
203 else
204 tprintf(", %" PRIu64, val);
205 }
206 break;
207
208 /* More complex types */
209 case BLKDISCARD:
210 case BLKSECDISCARD:
211 if (entering(tcp)) {
212 uint64_t range[2];
213 if (umove(tcp, arg, range) < 0)
214 tprintf(", %#lx", arg);
215 else
216 tprintf(", {%" PRIx64 ", %" PRIx64 "}",
217 range[0], range[1]);
218 }
219 break;
220
221 case HDIO_GETGEO:
222 if (exiting(tcp)) {
223 struct hd_geometry geo;
224 if (syserror(tcp) || umove(tcp, arg, &geo) < 0)
225 tprintf(", %#lx", arg);
226 else
227 tprintf(", {heads=%hhu, sectors=%hhu, "
228 "cylinders=%hu, start=%lu}",
229 geo.heads, geo.sectors,
230 geo.cylinders, geo.start);
231 }
232 break;
233
234 case BLKPG:
235 if (entering(tcp)) {
236 struct blkpg_ioctl_arg blkpg;
237 if (umove(tcp, arg, &blkpg) < 0)
238 tprintf(", %#lx", arg);
239 else {
240 tprintf(", ");
241 print_blkpg_req(tcp, &blkpg);
242 }
243 }
244 break;
245
246 case BLKTRACESETUP:
247 if (entering(tcp)) {
248 struct blk_user_trace_setup buts;
249 if (umove(tcp, arg, &buts) < 0)
250 tprintf(", %#lx", arg);
251 else
252 tprintf(", {act_mask=%hu, buf_size=%u, "
253 "buf_nr=%u, start_lba=%" PRIu64 ", "
254 "end_lba=%" PRIu64 ", pid=%u}",
255 buts.act_mask, buts.buf_size,
256 buts.buf_nr, buts.start_lba,
257 buts.end_lba, buts.pid);
258 }
259 if (exiting(tcp)) {
260 struct blk_user_trace_setup buts;
261 if (syserror(tcp) || umove(tcp, arg, &buts) < 0)
262 tprintf(", %#lx", arg);
263 else
264 tprintf(", {name=\"%.*s\"}",
265 (int) sizeof(buts.name), buts.name);
266 }
267 break;
268
269 /* No arguments or unhandled */
270 case BLKTRACESTART:
271 case BLKTRACESTOP:
272 case BLKTRACETEARDOWN:
273 case BLKFLSBUF: /* Requires driver knowlege */
274 case BLKRRPART: /* No args */
275 default:
276 if (entering(tcp))
277 tprintf(", %#lx", arg);
278 break;
279
280 };
281 return 1;
282 }
283 #endif /* LINUX */
284