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 #include <linux/blkpg.h>
30 #include <linux/fs.h>
31 #include <linux/hdreg.h>
32
33 /* ioctls <= 114 are present in Linux 2.4. The following ones have been
34 * added since then and headers containing them may not be available on
35 * every system. */
36
37 #define BLKTRACE_BDEV_SIZE 32
38 struct blk_user_trace_setup {
39 char name[BLKTRACE_BDEV_SIZE]; /* output */
40 uint16_t act_mask; /* input */
41 uint32_t buf_size; /* input */
42 uint32_t buf_nr; /* input */
43 uint64_t start_lba;
44 uint64_t end_lba;
45 uint32_t pid;
46 };
47
48 #ifndef BLKTRACESETUP
49 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
50 #endif
51 #ifndef BLKTRACESTART
52 #define BLKTRACESTART _IO(0x12,116)
53 #endif
54 #ifndef BLKTRACESTOP
55 #define BLKTRACESTOP _IO(0x12,117)
56 #endif
57 #ifndef BLKTRACETEARDOWN
58 #define BLKTRACETEARDOWN _IO(0x12,118)
59 #endif
60 #ifndef BLKDISCARD
61 #define BLKDISCARD _IO(0x12,119)
62 #endif
63 #ifndef BLKIOMIN
64 #define BLKIOMIN _IO(0x12,120)
65 #endif
66 #ifndef BLKIOOPT
67 #define BLKIOOPT _IO(0x12,121)
68 #endif
69 #ifndef BLKALIGNOFF
70 #define BLKALIGNOFF _IO(0x12,122)
71 #endif
72 #ifndef BLKPBSZGET
73 #define BLKPBSZGET _IO(0x12,123)
74 #endif
75 #ifndef BLKDISCARDZEROES
76 #define BLKDISCARDZEROES _IO(0x12,124)
77 #endif
78 #ifndef BLKSECDISCARD
79 #define BLKSECDISCARD _IO(0x12,125)
80 #endif
81
82 #include "xlat/blkpg_ops.h"
83
84 static void
print_blkpg_req(struct tcb * tcp,struct blkpg_ioctl_arg * blkpg)85 print_blkpg_req(struct tcb *tcp, struct blkpg_ioctl_arg *blkpg)
86 {
87 struct blkpg_partition p;
88
89 tprints("{");
90 printxval(blkpg_ops, blkpg->op, "BLKPG_???");
91
92 tprintf(", flags=%d, datalen=%d, ",
93 blkpg->flags, blkpg->datalen);
94
95 if (umove(tcp, (long) blkpg->data, &p) < 0)
96 tprintf("%#lx}", (long) blkpg->data);
97 else
98 tprintf("{start=%lld, length=%lld, pno=%d, "
99 "devname=\"%.*s\", volname=\"%.*s\"}}",
100 p.start, p.length, p.pno,
101 (int) sizeof(p.devname), p.devname,
102 (int) sizeof(p.volname), p.volname);
103 }
104
105 int
block_ioctl(struct tcb * tcp,long code,long arg)106 block_ioctl(struct tcb *tcp, long code, long arg)
107 {
108 switch (code) {
109 /* take arg as a value, not as a pointer */
110 case BLKRASET:
111 case BLKFRASET:
112 if (entering(tcp))
113 tprintf(", %ld", arg);
114 break;
115
116 /* take a signed int */
117 case BLKROSET:
118 case BLKBSZSET:
119 if (entering(tcp)) {
120 int val;
121 if (umove(tcp, arg, &val) < 0)
122 tprintf(", %#lx", arg);
123 else
124 tprintf(", %d", val);
125 }
126 break;
127
128 /* returns an unsigned short */
129 case BLKSECTGET:
130 if (exiting(tcp)) {
131 unsigned short val;
132 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
133 tprintf(", %#lx", arg);
134 else
135 tprintf(", %u", (unsigned)val);
136 }
137 break;
138
139 /* return a signed int */
140 case BLKROGET:
141 case BLKBSZGET:
142 case BLKSSZGET:
143 case BLKALIGNOFF:
144 if (exiting(tcp)) {
145 int val;
146 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
147 tprintf(", %#lx", arg);
148 else
149 tprintf(", %d", val);
150 }
151 break;
152
153 /* return an unsigned int */
154 case BLKPBSZGET:
155 case BLKIOMIN:
156 case BLKIOOPT:
157 case BLKDISCARDZEROES:
158 if (exiting(tcp)) {
159 unsigned int val;
160 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
161 tprintf(", %#lx", arg);
162 else
163 tprintf(", %u", val);
164 }
165 break;
166
167 /* return a signed long */
168 case BLKRAGET:
169 case BLKFRAGET:
170 if (exiting(tcp)) {
171 long val;
172 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
173 tprintf(", %#lx", arg);
174 else
175 tprintf(", %ld", val);
176 }
177 break;
178
179 /* returns an unsigned long */
180 case BLKGETSIZE:
181 if (exiting(tcp)) {
182 unsigned long val;
183 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
184 tprintf(", %#lx", arg);
185 else
186 tprintf(", %lu", val);
187 }
188 break;
189
190 #ifdef HAVE_BLKGETSIZE64
191 /* return an uint64_t */
192 case BLKGETSIZE64:
193 if (exiting(tcp)) {
194 uint64_t val;
195 if (syserror(tcp) || umove(tcp, arg, &val) < 0)
196 tprintf(", %#lx", arg);
197 else
198 tprintf(", %" PRIu64, val);
199 }
200 break;
201 #endif
202
203 /* More complex types */
204 case BLKDISCARD:
205 case BLKSECDISCARD:
206 if (entering(tcp)) {
207 uint64_t range[2];
208 if (umove(tcp, arg, range) < 0)
209 tprintf(", %#lx", arg);
210 else
211 tprintf(", {%" PRIx64 ", %" PRIx64 "}",
212 range[0], range[1]);
213 }
214 break;
215
216 case HDIO_GETGEO:
217 if (exiting(tcp)) {
218 struct hd_geometry geo;
219 if (syserror(tcp) || umove(tcp, arg, &geo) < 0)
220 tprintf(", %#lx", arg);
221 else
222 tprintf(", {heads=%u, sectors=%u, "
223 "cylinders=%u, start=%lu}",
224 (unsigned)geo.heads,
225 (unsigned)geo.sectors,
226 (unsigned)geo.cylinders,
227 geo.start);
228 }
229 break;
230
231 case BLKPG:
232 if (entering(tcp)) {
233 struct blkpg_ioctl_arg blkpg;
234 if (umove(tcp, arg, &blkpg) < 0)
235 tprintf(", %#lx", arg);
236 else {
237 tprints(", ");
238 print_blkpg_req(tcp, &blkpg);
239 }
240 }
241 break;
242
243 case BLKTRACESETUP:
244 if (entering(tcp)) {
245 struct blk_user_trace_setup buts;
246 if (umove(tcp, arg, &buts) < 0)
247 tprintf(", %#lx", arg);
248 else
249 tprintf(", {act_mask=%u, buf_size=%u, "
250 "buf_nr=%u, start_lba=%" PRIu64 ", "
251 "end_lba=%" PRIu64 ", pid=%u}",
252 (unsigned)buts.act_mask, buts.buf_size,
253 buts.buf_nr, buts.start_lba,
254 buts.end_lba, buts.pid);
255 }
256 if (exiting(tcp)) {
257 struct blk_user_trace_setup buts;
258 if (syserror(tcp) || umove(tcp, arg, &buts) < 0)
259 tprintf(", %#lx", arg);
260 else
261 tprintf(", {name=\"%.*s\"}",
262 (int) sizeof(buts.name), buts.name);
263 }
264 break;
265
266 /* No arguments or unhandled */
267 case BLKTRACESTART:
268 case BLKTRACESTOP:
269 case BLKTRACETEARDOWN:
270 case BLKFLSBUF: /* Requires driver knowlege */
271 case BLKRRPART: /* No args */
272 default:
273 if (entering(tcp))
274 tprintf(", %#lx", arg);
275 break;
276
277 };
278 return 1;
279 }
280