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