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 static const struct xlat blkpg_ops[] = {
  83         { BLKPG_ADD_PARTITION,  "BLKPG_ADD_PARTITION", },
  84         { BLKPG_DEL_PARTITION,  "BLKPG_DEL_PARTITION", },
  85         { 0,                    NULL },
  86 };
  87
  88 static void
  89 print_blkpg_req(struct tcb *tcp, struct blkpg_ioctl_arg *blkpg)
  90 {
  91         struct blkpg_partition p;
  92
  93         tprints("{");
  94         printxval(blkpg_ops, blkpg->op, "BLKPG_???");
  95
  96         tprintf(", flags=%d, datalen=%d, ",
  97                 blkpg->flags, blkpg->datalen);
  98
  99         if (umove(tcp, (long) blkpg->data, &p) < 0)
 100                 tprintf("%#lx}", (long) blkpg->data);
 101         else
 102                 tprintf("{start=%lld, length=%lld, pno=%d, "
 103                         "devname=\"%.*s\", volname=\"%.*s\"}}",
 104                         p.start, p.length, p.pno,
 105                         (int) sizeof(p.devname), p.devname,
 106                         (int) sizeof(p.volname), p.volname);
 107 }
 108
 109 int
 110 block_ioctl(struct tcb *tcp, long code, long arg)
 111 {
 112         switch (code) {
 113         /* take arg as a value, not as a pointer */
 114         case BLKRASET:
 115         case BLKFRASET:
 116                 if (entering(tcp))
 117                         tprintf(", %ld", arg);
 118                 break;
 119
 120         /* take a signed int */
 121         case BLKROSET:
 122         case BLKBSZSET:
 123                 if (entering(tcp)) {
 124                         int val;
 125                         if (umove(tcp, arg, &val) < 0)
 126                                 tprintf(", %#lx", arg);
 127                         else
 128                                 tprintf(", %d", val);
 129                 }
 130                 break;
 131
 132         /* returns an unsigned short */
 133         case BLKSECTGET:
 134                 if (exiting(tcp)) {
 135                         unsigned short val;
 136                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 137                                 tprintf(", %#lx", arg);
 138                         else
 139                                 tprintf(", %u", (unsigned)val);
 140                 }
 141                 break;
 142
 143         /* return a signed int */
 144         case BLKROGET:
 145         case BLKBSZGET:
 146         case BLKSSZGET:
 147         case BLKALIGNOFF:
 148                 if (exiting(tcp)) {
 149                         int val;
 150                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 151                                 tprintf(", %#lx", arg);
 152                         else
 153                                 tprintf(", %d", val);
 154                 }
 155                 break;
 156
 157         /* return an unsigned int */
 158         case BLKPBSZGET:
 159         case BLKIOMIN:
 160         case BLKIOOPT:
 161         case BLKDISCARDZEROES:
 162                 if (exiting(tcp)) {
 163                         unsigned int val;
 164                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 165                                 tprintf(", %#lx", arg);
 166                         else
 167                                 tprintf(", %u", val);
 168                 }
 169                 break;
 170
 171         /* return a signed long */
 172         case BLKRAGET:
 173         case BLKFRAGET:
 174                 if (exiting(tcp)) {
 175                         long val;
 176                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 177                                 tprintf(", %#lx", arg);
 178                         else
 179                                 tprintf(", %ld", val);
 180                 }
 181                 break;
 182
 183         /* returns an unsigned long */
 184         case BLKGETSIZE:
 185                 if (exiting(tcp)) {
 186                         unsigned long val;
 187                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 188                                 tprintf(", %#lx", arg);
 189                         else
 190                                 tprintf(", %lu", val);
 191                 }
 192                 break;
 193
 194 #ifdef HAVE_BLKGETSIZE64
 195         /* return an uint64_t */
 196         case BLKGETSIZE64:
 197                 if (exiting(tcp)) {
 198                         uint64_t val;
 199                         if (syserror(tcp) || umove(tcp, arg, &val) < 0)
 200                                 tprintf(", %#lx", arg);
 201                         else
 202                                 tprintf(", %" PRIu64, val);
 203                 }
 204                 break;
 205 #endif
 206
 207         /* More complex types */
 208         case BLKDISCARD:
 209         case BLKSECDISCARD:
 210                 if (entering(tcp)) {
 211                         uint64_t range[2];
 212                         if (umove(tcp, arg, range) < 0)
 213                                 tprintf(", %#lx", arg);
 214                         else
 215                                 tprintf(", {%" PRIx64 ", %" PRIx64 "}",
 216                                         range[0], range[1]);
 217                 }
 218                 break;
 219
 220         case HDIO_GETGEO:
 221                 if (exiting(tcp)) {
 222                         struct hd_geometry geo;
 223                         if (syserror(tcp) || umove(tcp, arg, &geo) < 0)
 224                                 tprintf(", %#lx", arg);
 225                         else
 226                                 tprintf(", {heads=%u, sectors=%u, "
 227                                         "cylinders=%u, start=%lu}",
 228                                         (unsigned)geo.heads,
 229                                         (unsigned)geo.sectors,
 230                                         (unsigned)geo.cylinders,
 231                                         geo.start);
 232                 }
 233                 break;
 234
 235         case BLKPG:
 236                 if (entering(tcp)) {
 237                         struct blkpg_ioctl_arg blkpg;
 238                         if (umove(tcp, arg, &blkpg) < 0)
 239                                 tprintf(", %#lx", arg);
 240                         else {
 241                                 tprints(", ");
 242                                 print_blkpg_req(tcp, &blkpg);
 243                         }
 244                 }
 245                 break;
 246
 247         case BLKTRACESETUP:
 248                 if (entering(tcp)) {
 249                         struct blk_user_trace_setup buts;
 250                         if (umove(tcp, arg, &buts) < 0)
 251                                 tprintf(", %#lx", arg);
 252                         else
 253                                 tprintf(", {act_mask=%u, buf_size=%u, "
 254                                         "buf_nr=%u, start_lba=%" PRIu64 ", "
 255                                         "end_lba=%" PRIu64 ", pid=%u}",
 256                                         (unsigned)buts.act_mask, buts.buf_size,
 257                                         buts.buf_nr, buts.start_lba,
 258                                         buts.end_lba, buts.pid);
 259                 }
 260                 if (exiting(tcp)) {
 261                         struct blk_user_trace_setup buts;
 262                         if (syserror(tcp) || umove(tcp, arg, &buts) < 0)
 263                                 tprintf(", %#lx", arg);
 264                         else
 265                                 tprintf(", {name=\"%.*s\"}",
 266                                         (int) sizeof(buts.name), buts.name);
 267                 }
 268                 break;
 269
 270         /* No arguments or unhandled */
 271         case BLKTRACESTART:
 272         case BLKTRACESTOP:
 273         case BLKTRACETEARDOWN:
 274         case BLKFLSBUF: /* Requires driver knowlege */
 275         case BLKRRPART: /* No args */
 276         default:
 277                 if (entering(tcp))
 278                         tprintf(", %#lx", arg);
 279                 break;
 280
 281         };
 282         return 1;
 283 }