1a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat/* 2a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * Copyright (C) 2008 The Android Open Source Project 3a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * 4a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * Licensed under the Apache License, Version 2.0 (the "License"); 5a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * you may not use this file except in compliance with the License. 6a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * You may obtain a copy of the License at 7a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * 8a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * http://www.apache.org/licenses/LICENSE-2.0 9a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * 10a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * Unless required by applicable law or agreed to in writing, software 11a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * distributed under the License is distributed on an "AS IS" BASIS, 12a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * See the License for the specific language governing permissions and 14a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat * limitations under the License. 15a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat */ 16a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 17a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <stdio.h> 1837dcda68d334f70e1f7f69a9817def65fe3ee717Olivier Bailly#include <stdlib.h> 19a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <fcntl.h> 20a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <unistd.h> 21a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <errno.h> 22a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <string.h> 23a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 24344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include <sys/mount.h> 258da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat#include <sys/types.h> 268da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat#include <sys/stat.h> 2737dcda68d334f70e1f7f69a9817def65fe3ee717Olivier Bailly#include <sys/ioctl.h> 288da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat 29d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat#include <linux/kdev_t.h> 30d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 31a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#define LOG_TAG "Vold" 32a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 33a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include <cutils/log.h> 34a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 35d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat#include <sysutils/SocketClient.h> 36a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include "Loop.h" 37344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include "Asec.h" 3814eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa#include "VoldUtil.h" 39684e662502a310868da052192b80604234b66711Stephen Smalley#include "sehandle.h" 40a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 41d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::dumpState(SocketClient *c) { 42d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int i; 43d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int fd; 44d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat char filename[256]; 45d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 46d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat for (i = 0; i < LOOP_MAX; i++) { 47508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 48d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int rc; 49d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 50d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat sprintf(filename, "/dev/block/loop%d", i); 51d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 52ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 53d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (errno != ENOENT) { 5497ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 55d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } else { 56d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 57d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 58d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return -1; 59d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 60d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 61508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 62d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat close(fd); 63d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (rc < 0 && errno == ENXIO) { 64d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 65d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 66d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 67d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (rc < 0) { 6897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 69d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat strerror(errno)); 70d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return -1; 71d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 72d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat char *tmp = NULL; 73508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root asprintf(&tmp, "%s %d %lld:%lld %llu %lld:%lld %lld 0x%x {%s} {%s}", filename, li.lo_number, 74d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat MAJOR(li.lo_device), MINOR(li.lo_device), li.lo_inode, MAJOR(li.lo_rdevice), 75508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root MINOR(li.lo_rdevice), li.lo_offset, li.lo_flags, li.lo_crypt_name, 76508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root li.lo_file_name); 77d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat c->sendMsg(0, tmp, false); 78d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat free(tmp); 79d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 80d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return 0; 81d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat} 82d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 83d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::lookupActive(const char *id, char *buffer, size_t len) { 84a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int i; 85a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int fd; 86a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat char filename[256]; 87a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 88a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat memset(buffer, 0, len); 89a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 90a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat for (i = 0; i < LOOP_MAX; i++) { 91508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 92a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int rc; 93a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 94a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat sprintf(filename, "/dev/block/loop%d", i); 95a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 96ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 97b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat if (errno != ENOENT) { 9897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 99d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } else { 100d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 101b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat } 102a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 103a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 104a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 105508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 106a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0 && errno == ENXIO) { 107a1038a95667503457423a994510dd528e2ed3e90tao.pei close(fd); 108a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat continue; 109a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 110a1038a95667503457423a994510dd528e2ed3e90tao.pei close(fd); 111a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 112a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0) { 11397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 114a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat strerror(errno)); 115a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 116a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 117508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root if (!strncmp((const char*) li.lo_crypt_name, id, LO_NAME_SIZE)) { 118a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat break; 119a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 120a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 121a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 122a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (i == LOOP_MAX) { 123a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOENT; 124a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 125a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 1262152266deb82f96ef5a22d3a56a76bf6177e1e04Henrik Baard strlcpy(buffer, filename, len); 127a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 128a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 129a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 130d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::create(const char *id, const char *loopFile, char *loopDeviceBuffer, size_t len) { 131a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int i; 132a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int fd; 133a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat char filename[256]; 134a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 135a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat for (i = 0; i < LOOP_MAX; i++) { 1367c16502dbc16658c45165edb1c54df6b8b02d9caKenny Root struct loop_info64 li; 137a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int rc; 138684e662502a310868da052192b80604234b66711Stephen Smalley char *secontext = NULL; 139a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 140a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat sprintf(filename, "/dev/block/loop%d", i); 141a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1428da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat /* 1438da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat * The kernel starts us off with 8 loop nodes, but more 1448da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat * are created on-demand if needed. 1458da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat */ 1468da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat mode_t mode = 0660 | S_IFBLK; 147b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat unsigned int dev = (0xff & i) | ((i << 12) & 0xfff00000) | (7 << 8); 148684e662502a310868da052192b80604234b66711Stephen Smalley 149684e662502a310868da052192b80604234b66711Stephen Smalley if (sehandle) { 150684e662502a310868da052192b80604234b66711Stephen Smalley rc = selabel_lookup(sehandle, &secontext, filename, S_IFBLK); 151684e662502a310868da052192b80604234b66711Stephen Smalley if (rc == 0) 152684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(secontext); 153684e662502a310868da052192b80604234b66711Stephen Smalley } 154684e662502a310868da052192b80604234b66711Stephen Smalley 1558da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat if (mknod(filename, mode, dev) < 0) { 1568da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat if (errno != EEXIST) { 157684e662502a310868da052192b80604234b66711Stephen Smalley int sverrno = errno; 15897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error creating loop device node (%s)", strerror(errno)); 159684e662502a310868da052192b80604234b66711Stephen Smalley if (secontext) { 160684e662502a310868da052192b80604234b66711Stephen Smalley freecon(secontext); 161684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(NULL); 162684e662502a310868da052192b80604234b66711Stephen Smalley } 163684e662502a310868da052192b80604234b66711Stephen Smalley errno = sverrno; 1648da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat return -1; 1658da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat } 1668da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat } 167684e662502a310868da052192b80604234b66711Stephen Smalley if (secontext) { 168684e662502a310868da052192b80604234b66711Stephen Smalley freecon(secontext); 169684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(NULL); 170684e662502a310868da052192b80604234b66711Stephen Smalley } 1718da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat 172ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 17397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 174a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 175a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 176a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1777c16502dbc16658c45165edb1c54df6b8b02d9caKenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 178a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0 && errno == ENXIO) 179a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat break; 180a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1818da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat close(fd); 1828da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat 183a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0) { 18497ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 185a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat strerror(errno)); 186a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 187a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 188a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 189a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 190a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (i == LOOP_MAX) { 19197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Exhausted all loop devices"); 192a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOSPC; 193a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 194a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 195a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1962152266deb82f96ef5a22d3a56a76bf6177e1e04Henrik Baard strlcpy(loopDeviceBuffer, filename, len); 197a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1988da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat int file_fd; 199a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 200ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((file_fd = open(loopFile, O_RDWR | O_CLOEXEC)) < 0) { 20197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", loopFile, strerror(errno)); 202a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 203a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 204a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 205a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 206a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (ioctl(fd, LOOP_SET_FD, file_fd) < 0) { 20797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error setting up loopback interface (%s)", strerror(errno)); 208a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 209a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 210a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 211a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 212a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 213508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 214a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 215a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat memset(&li, 0, sizeof(li)); 216092aa1c585fedd9e169eece41b8a471f1739908aPeter Bohm strlcpy((char*) li.lo_crypt_name, id, LO_NAME_SIZE); 217092aa1c585fedd9e169eece41b8a471f1739908aPeter Bohm strlcpy((char*) li.lo_file_name, loopFile, LO_NAME_SIZE); 218a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 219508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root if (ioctl(fd, LOOP_SET_STATUS64, &li) < 0) { 22097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error setting loopback status (%s)", strerror(errno)); 221a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 222a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 223a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 224a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 225a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 226a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 227a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 228a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 229a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 230a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 231a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 232a19b250bd273455933ca3502cf2c2e0a803aff77San Mehatint Loop::destroyByDevice(const char *loopDevice) { 233a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int device_fd; 234a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 235ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey device_fd = open(loopDevice, O_RDONLY | O_CLOEXEC); 236a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (device_fd < 0) { 23797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to open loop (%d)", errno); 238a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 239a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 240a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 241a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (ioctl(device_fd, LOOP_CLR_FD, 0) < 0) { 24297ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to destroy loop (%d)", errno); 243a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(device_fd); 244a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 245a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 246a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 247a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(device_fd); 248a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 249a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 250a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 2513e971277db0d87652af5622c989233e7159ab909Mark Salyzynint Loop::destroyByFile(const char * /*loopFile*/) { 252a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOSYS; 253a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 254a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 255a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 256a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowakint Loop::createImageFile(const char *file, unsigned long numSectors) { 257a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int fd; 258a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 259a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if ((fd = creat(file, 0600)) < 0) { 26097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error creating imagefile (%s)", strerror(errno)); 261a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 262a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 263a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 2648b8f71b1d760411279f3b07a5c97709f052c689eSan Mehat if (ftruncate(fd, numSectors * 512) < 0) { 26597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error truncating imagefile (%s)", strerror(errno)); 266a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 267a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 268a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 269a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 270a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 271a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 272344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 273a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowakint Loop::resizeImageFile(const char *file, unsigned long numSectors) { 274fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg int fd; 275fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 276ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(file, O_RDWR | O_CLOEXEC)) < 0) { 277fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error opening imagefile (%s)", strerror(errno)); 278fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 279fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 280fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 281a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowak SLOGD("Attempting to increase size of %s to %lu sectors.", file, numSectors); 282fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 283fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (fallocate(fd, 0, 0, numSectors * 512)) { 28443ed123d3fc1a3edf3660cd0e2528e971abc399eJeff Sharkey if (errno == ENOSYS || errno == ENOTSUP) { 285fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGW("fallocate not found. Falling back to ftruncate."); 286fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (ftruncate(fd, numSectors * 512) < 0) { 287fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error truncating imagefile (%s)", strerror(errno)); 288fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 289fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 290fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 291fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } else { 292fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error allocating space (%s)", strerror(errno)); 293fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 294fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 295fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 296fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 297fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 298fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return 0; 299fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg} 300fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 30114eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawaint Loop::lookupInfo(const char *loopDevice, struct asec_superblock *sb, unsigned long *nr_sec) { 302344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int fd; 303344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root struct asec_superblock buffer; 304344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 305ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(loopDevice, O_RDONLY | O_CLOEXEC)) < 0) { 306344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("Failed to open loopdevice (%s)", strerror(errno)); 307344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 308344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 309344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 310344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 31114eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa get_blkdev_size(fd, nr_sec); 31214eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa if (*nr_sec == 0) { 313344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("Failed to get loop size (%s)", strerror(errno)); 314344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 315344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 316344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 317344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 318344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 319344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root /* 320344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Try to read superblock. 321344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root */ 322344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root memset(&buffer, 0, sizeof(struct asec_superblock)); 323344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root if (lseek(fd, ((*nr_sec - 1) * 512), SEEK_SET) < 0) { 324344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("lseek failed (%s)", strerror(errno)); 325344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 326344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 327344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 328344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 329344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root if (read(fd, &buffer, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) { 330344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("superblock read failed (%s)", strerror(errno)); 331344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 332344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 333344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 334344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 335344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 336344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 337344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root /* 338344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Superblock successfully read. Copy to caller's struct. 339344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root */ 340344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root memcpy(sb, &buffer, sizeof(struct asec_superblock)); 341344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 342344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root} 343