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

   1 /*
   2  * Copyright (c) 2012 The Chromium OS Authors.
   3  * Written by Mike Frysinger <vapier@gentoo.org>.
   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
  30 #include <sys/ioctl.h>
  31
  32 #include <linux/loop.h>
  33
  34 #include "xlat/loop_flags_options.h"
  35
  36 #include "xlat/loop_crypt_type_options.h"
  37
  38 int loop_ioctl(struct tcb *tcp, long code, long arg)
  39 {
  40         struct loop_info info;
  41         struct loop_info64 info64;
  42         char *s = alloca((LO_NAME_SIZE + LO_KEY_SIZE) * 4);
  43
  44         if (entering(tcp))
  45                 return 0;
  46
  47         switch (code) {
  48
  49         case LOOP_SET_STATUS:
  50         case LOOP_GET_STATUS:
  51                 if (!verbose(tcp) || umove(tcp, arg, &info) < 0)
  52                         return 0;
  53
  54                 tprintf(", {number=%d", info.lo_number);
  55
  56                 if (!abbrev(tcp)) {
  57                         tprintf(", device=%#lx, inode=%lu, rdevice=%#lx",
  58                                 (unsigned long) info.lo_device,
  59                                 info.lo_inode,
  60                                 (unsigned long) info.lo_rdevice);
  61                 }
  62
  63                 tprintf(", offset=%#x", info.lo_offset);
  64
  65                 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
  66                         tprints(", encrypt_type=");
  67                         printxval(loop_crypt_type_options, info.lo_encrypt_type,
  68                                 "LO_CRYPT_???");
  69                         tprintf(", encrypt_key_size=%d", info.lo_encrypt_key_size);
  70                 }
  71
  72                 tprints(", flags=");
  73                 printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
  74
  75                 string_quote(info.lo_name, s, -1, LO_NAME_SIZE);
  76                 tprintf(", name=%s", s);
  77
  78                 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
  79                         string_quote((void *) info.lo_encrypt_key, s, 0, LO_KEY_SIZE);
  80                         tprintf(", encrypt_key=%s", s);
  81                 }
  82
  83                 if (!abbrev(tcp))
  84                         tprintf(", init={%#lx, %#lx}"
  85                                 ", reserved={%#x, %#x, %#x, %#x}}",
  86                                 info.lo_init[0], info.lo_init[1],
  87                                 info.reserved[0], info.reserved[1],
  88                                 info.reserved[2], info.reserved[3]);
  89                 else
  90                         tprints(", ...}");
  91
  92                 return 1;
  93
  94         case LOOP_SET_STATUS64:
  95         case LOOP_GET_STATUS64:
  96                 if (!verbose(tcp) || umove(tcp, arg, &info64) < 0)
  97                         return 0;
  98
  99                 tprints(", {");
 100
 101                 if (!abbrev(tcp)) {
 102                         tprintf("device=%" PRIu64 ", inode=%" PRIu64 ", "
 103                                 "rdevice=%" PRIu64 ", offset=%#" PRIx64 ", "
 104                                 "sizelimit=%" PRIu64 ", number=%" PRIu32,
 105                                 (uint64_t) info64.lo_device,
 106                                 (uint64_t) info64.lo_inode,
 107                                 (uint64_t) info64.lo_rdevice,
 108                                 (uint64_t) info64.lo_offset,
 109                                 (uint64_t) info64.lo_sizelimit,
 110                                 (uint32_t) info64.lo_number);
 111                 } else {
 112                         tprintf("offset=%#" PRIx64 ", number=%" PRIu32,
 113                                 (uint64_t) info64.lo_offset,
 114                                 (uint32_t) info64.lo_number);
 115                 }
 116
 117                 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
 118                         tprints(", encrypt_type=");
 119                         printxval(loop_crypt_type_options, info64.lo_encrypt_type,
 120                                 "LO_CRYPT_???");
 121                         tprintf(", encrypt_key_size=%" PRIu32,
 122                                 info64.lo_encrypt_key_size);
 123                 }
 124
 125                 tprints(", flags=");
 126                 printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
 127
 128                 string_quote((void *) info64.lo_file_name, s, -1, LO_NAME_SIZE);
 129                 tprintf(", file_name=%s", s);
 130
 131                 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
 132                         string_quote((void *) info64.lo_crypt_name, s, -1, LO_NAME_SIZE);
 133                         tprintf(", crypt_name=%s", s);
 134                         string_quote((void *) info64.lo_encrypt_key, s, 0, LO_KEY_SIZE);
 135                         tprintf(", encrypt_key=%s", s);
 136                 }
 137
 138                 if (!abbrev(tcp))
 139                         tprintf(", init={%#" PRIx64 ", %#" PRIx64 "}}",
 140                                 (uint64_t) info64.lo_init[0],
 141                                 (uint64_t) info64.lo_init[1]);
 142                 else
 143                         tprints(", ...}");
 144
 145                 return 1;
 146
 147         case LOOP_CLR_FD:
 148 #ifdef LOOP_SET_CAPACITY
 149         case LOOP_SET_CAPACITY:
 150 #endif
 151 #ifdef LOOP_CTL_GET_FREE
 152         /* newer loop-control stuff */
 153         case LOOP_CTL_GET_FREE:
 154 #endif
 155                 /* Takes no arguments */
 156                 return 1;
 157
 158         case LOOP_SET_FD:
 159         case LOOP_CHANGE_FD:
 160 #ifdef LOOP_CTL_ADD
 161         /* newer loop-control stuff */
 162         case LOOP_CTL_ADD:
 163         case LOOP_CTL_REMOVE:
 164 #endif
 165                 /* These take simple args, so let default printer handle it */
 166
 167         default:
 168                 return 0;
 169         }
 170 }