1 /* 2 * Copyright (c) 2012 The Chromium OS Authors. 3 * Written by Mike Frysinger <vapier (at) 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 #include <linux/ioctl.h> 30 #include <linux/loop.h> 31 32 typedef struct loop_info struct_loop_info; 33 34 #include DEF_MPERS_TYPE(struct_loop_info) 35 36 #include MPERS_DEFS 37 38 #include "xlat/loop_cmds.h" 39 #include "xlat/loop_flags_options.h" 40 #include "xlat/loop_crypt_type_options.h" 41 42 static void 43 decode_loop_info(struct tcb *const tcp, const kernel_ulong_t addr) 44 { 45 struct_loop_info info; 46 47 tprints(", "); 48 if (umove_or_printaddr(tcp, addr, &info)) 49 return; 50 51 tprintf("{lo_number=%d", info.lo_number); 52 53 if (!abbrev(tcp)) { 54 tprints(", lo_device="); 55 print_dev_t(info.lo_device); 56 tprintf(", lo_inode=%" PRI_klu, (kernel_ulong_t) info.lo_inode); 57 tprints(", lo_rdevice="); 58 print_dev_t(info.lo_rdevice); 59 } 60 61 tprintf(", lo_offset=%#x", info.lo_offset); 62 63 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) { 64 tprints(", lo_encrypt_type="); 65 printxval(loop_crypt_type_options, info.lo_encrypt_type, 66 "LO_CRYPT_???"); 67 /* 68 * It is converted to unsigned before use in kernel, see 69 * loop_info64_from_old in drivers/block/loop.c 70 */ 71 tprintf(", lo_encrypt_key_size=%" PRIu32, 72 (uint32_t) info.lo_encrypt_key_size); 73 } 74 75 tprints(", lo_flags="); 76 printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???"); 77 78 tprints(", lo_name="); 79 print_quoted_string(info.lo_name, LO_NAME_SIZE, 80 QUOTE_0_TERMINATED); 81 82 if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) { 83 tprints(", lo_encrypt_key="); 84 print_quoted_string((void *) info.lo_encrypt_key, 85 MIN((uint32_t) info.lo_encrypt_key_size, 86 LO_KEY_SIZE), 0); 87 } 88 89 if (!abbrev(tcp)) 90 tprintf(", lo_init=[%#" PRI_klx ", %#" PRI_klx "]" 91 ", reserved=[%#hhx, %#hhx, %#hhx, %#hhx]}", 92 (kernel_ulong_t) info.lo_init[0], 93 (kernel_ulong_t) info.lo_init[1], 94 info.reserved[0], info.reserved[1], 95 info.reserved[2], info.reserved[3]); 96 else 97 tprints(", ...}"); 98 } 99 100 static void 101 decode_loop_info64(struct tcb *const tcp, const kernel_ulong_t addr) 102 { 103 struct loop_info64 info64; 104 105 tprints(", "); 106 if (umove_or_printaddr(tcp, addr, &info64)) 107 return; 108 109 if (!abbrev(tcp)) { 110 tprints("{lo_device="); 111 print_dev_t(info64.lo_device); 112 tprintf(", lo_inode=%" PRIu64, (uint64_t) info64.lo_inode); 113 tprints(", lo_rdevice="); 114 print_dev_t(info64.lo_rdevice); 115 tprintf(", lo_offset=%#" PRIx64 ", lo_sizelimit=%" PRIu64 116 ", lo_number=%" PRIu32, 117 (uint64_t) info64.lo_offset, 118 (uint64_t) info64.lo_sizelimit, 119 (uint32_t) info64.lo_number); 120 } else { 121 tprintf("{lo_offset=%#" PRIx64 ", lo_number=%" PRIu32, 122 (uint64_t) info64.lo_offset, 123 (uint32_t) info64.lo_number); 124 } 125 126 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) { 127 tprints(", lo_encrypt_type="); 128 printxval(loop_crypt_type_options, info64.lo_encrypt_type, 129 "LO_CRYPT_???"); 130 tprintf(", lo_encrypt_key_size=%" PRIu32, 131 info64.lo_encrypt_key_size); 132 } 133 134 tprints(", lo_flags="); 135 printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???"); 136 137 tprints(", lo_file_name="); 138 print_quoted_string((void *) info64.lo_file_name, 139 LO_NAME_SIZE, QUOTE_0_TERMINATED); 140 141 if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) { 142 tprints(", lo_crypt_name="); 143 print_quoted_string((void *) info64.lo_crypt_name, 144 LO_NAME_SIZE, QUOTE_0_TERMINATED); 145 tprints(", lo_encrypt_key="); 146 print_quoted_string((void *) info64.lo_encrypt_key, 147 MIN(info64.lo_encrypt_key_size, 148 LO_KEY_SIZE), 0); 149 } 150 151 if (!abbrev(tcp)) 152 tprintf(", lo_init=[%#" PRIx64 ", %#" PRIx64 "]}", 153 (uint64_t) info64.lo_init[0], 154 (uint64_t) info64.lo_init[1]); 155 else 156 tprints(", ...}"); 157 } 158 159 MPERS_PRINTER_DECL(int, loop_ioctl, 160 struct tcb *tcp, const unsigned int code, 161 const kernel_ulong_t arg) 162 { 163 switch (code) { 164 case LOOP_GET_STATUS: 165 if (entering(tcp)) 166 return 0; 167 /* fall through */ 168 case LOOP_SET_STATUS: 169 decode_loop_info(tcp, arg); 170 break; 171 172 case LOOP_GET_STATUS64: 173 if (entering(tcp)) 174 return 0; 175 /* fall through */ 176 case LOOP_SET_STATUS64: 177 decode_loop_info64(tcp, arg); 178 break; 179 180 case LOOP_CLR_FD: 181 case LOOP_SET_CAPACITY: 182 /* newer loop-control stuff */ 183 case LOOP_CTL_GET_FREE: 184 /* Takes no arguments */ 185 break; 186 187 case LOOP_SET_FD: 188 case LOOP_CHANGE_FD: 189 tprints(", "); 190 printfd(tcp, arg); 191 break; 192 193 /* newer loop-control stuff */ 194 case LOOP_CTL_ADD: 195 case LOOP_CTL_REMOVE: 196 tprintf(", %d", (int) arg); 197 break; 198 199 case LOOP_SET_DIRECT_IO: 200 tprintf(", %" PRI_klu, arg); 201 break; 202 203 default: 204 return RVAL_DECODED; 205 } 206 207 return RVAL_DECODED | 1; 208 } 209
