granicus.if.org Git - strace/blob - block.c

   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
  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
 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 }