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 35fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey#include <android-base/logging.h> 36fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey#include <android-base/stringprintf.h> 37fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey#include <android-base/unique_fd.h> 38fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 39d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat#include <sysutils/SocketClient.h> 40a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat#include "Loop.h" 41344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root#include "Asec.h" 4214eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa#include "VoldUtil.h" 43684e662502a310868da052192b80604234b66711Stephen Smalley#include "sehandle.h" 44a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 45fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkeyusing android::base::StringPrintf; 46fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkeyusing android::base::unique_fd; 47fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 48d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::dumpState(SocketClient *c) { 49d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int i; 50d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int fd; 51d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat char filename[256]; 52d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 53d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat for (i = 0; i < LOOP_MAX; i++) { 54508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 55d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat int rc; 56d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 57605d7ae18d6e33b5dc1f6bb813ae32781498a4cdGeorge Burgess IV snprintf(filename, sizeof(filename), "/dev/block/loop%d", i); 58d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 59ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 60d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (errno != ENOENT) { 6197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 62d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } else { 63d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 64d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 65d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return -1; 66d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 67d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 68508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 69d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat close(fd); 70d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (rc < 0 && errno == ENXIO) { 71d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 72d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 73d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 74d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat if (rc < 0) { 7597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 76d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat strerror(errno)); 77d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return -1; 78d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 79d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat char *tmp = NULL; 80508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root asprintf(&tmp, "%s %d %lld:%lld %llu %lld:%lld %lld 0x%x {%s} {%s}", filename, li.lo_number, 81d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat MAJOR(li.lo_device), MINOR(li.lo_device), li.lo_inode, MAJOR(li.lo_rdevice), 82508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root MINOR(li.lo_rdevice), li.lo_offset, li.lo_flags, li.lo_crypt_name, 83508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root li.lo_file_name); 84d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat c->sendMsg(0, tmp, false); 85d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat free(tmp); 86d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } 87d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat return 0; 88d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat} 89d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat 90d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::lookupActive(const char *id, char *buffer, size_t len) { 91a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int i; 92a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int fd; 93a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat char filename[256]; 94a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 95a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat memset(buffer, 0, len); 96a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 97a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat for (i = 0; i < LOOP_MAX; i++) { 98508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 99a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int rc; 100a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 101605d7ae18d6e33b5dc1f6bb813ae32781498a4cdGeorge Burgess IV snprintf(filename, sizeof(filename), "/dev/block/loop%d", i); 102a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 103ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 104b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat if (errno != ENOENT) { 10597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 106d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat } else { 107d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehat continue; 108b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat } 109a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 110a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 111a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 112508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 113a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0 && errno == ENXIO) { 114a1038a95667503457423a994510dd528e2ed3e90tao.pei close(fd); 115a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat continue; 116a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 117a1038a95667503457423a994510dd528e2ed3e90tao.pei close(fd); 118a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 119a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0) { 12097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 121a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat strerror(errno)); 122a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 123a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 124508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root if (!strncmp((const char*) li.lo_crypt_name, id, LO_NAME_SIZE)) { 125a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat break; 126a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 127a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 128a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 129a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (i == LOOP_MAX) { 130a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOENT; 131a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 132a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 1332152266deb82f96ef5a22d3a56a76bf6177e1e04Henrik Baard strlcpy(buffer, filename, len); 134a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 135a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 136a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 137d9a4e358614a0c5f60cc76c0636ee4bb02004a32San Mehatint Loop::create(const char *id, const char *loopFile, char *loopDeviceBuffer, size_t len) { 138a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int i; 139a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int fd; 140a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat char filename[256]; 141a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 142a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat for (i = 0; i < LOOP_MAX; i++) { 1437c16502dbc16658c45165edb1c54df6b8b02d9caKenny Root struct loop_info64 li; 144a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int rc; 145684e662502a310868da052192b80604234b66711Stephen Smalley char *secontext = NULL; 146a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 147605d7ae18d6e33b5dc1f6bb813ae32781498a4cdGeorge Burgess IV snprintf(filename, sizeof(filename), "/dev/block/loop%d", i); 148a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1498da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat /* 1508da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat * The kernel starts us off with 8 loop nodes, but more 1518da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat * are created on-demand if needed. 1528da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat */ 1538da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat mode_t mode = 0660 | S_IFBLK; 154b78a32c1d5eeb243bdac0eaf18effb1897f1ee67San Mehat unsigned int dev = (0xff & i) | ((i << 12) & 0xfff00000) | (7 << 8); 155684e662502a310868da052192b80604234b66711Stephen Smalley 156684e662502a310868da052192b80604234b66711Stephen Smalley if (sehandle) { 157684e662502a310868da052192b80604234b66711Stephen Smalley rc = selabel_lookup(sehandle, &secontext, filename, S_IFBLK); 158684e662502a310868da052192b80604234b66711Stephen Smalley if (rc == 0) 159684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(secontext); 160684e662502a310868da052192b80604234b66711Stephen Smalley } 161684e662502a310868da052192b80604234b66711Stephen Smalley 1628da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat if (mknod(filename, mode, dev) < 0) { 1638da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat if (errno != EEXIST) { 164684e662502a310868da052192b80604234b66711Stephen Smalley int sverrno = errno; 16597ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error creating loop device node (%s)", strerror(errno)); 166684e662502a310868da052192b80604234b66711Stephen Smalley if (secontext) { 167684e662502a310868da052192b80604234b66711Stephen Smalley freecon(secontext); 168684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(NULL); 169684e662502a310868da052192b80604234b66711Stephen Smalley } 170684e662502a310868da052192b80604234b66711Stephen Smalley errno = sverrno; 1718da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat return -1; 1728da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat } 1738da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat } 174684e662502a310868da052192b80604234b66711Stephen Smalley if (secontext) { 175684e662502a310868da052192b80604234b66711Stephen Smalley freecon(secontext); 176684e662502a310868da052192b80604234b66711Stephen Smalley setfscreatecon(NULL); 177684e662502a310868da052192b80604234b66711Stephen Smalley } 1788da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat 179ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(filename, O_RDWR | O_CLOEXEC)) < 0) { 18097ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", filename, strerror(errno)); 181a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 182a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 183a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1847c16502dbc16658c45165edb1c54df6b8b02d9caKenny Root rc = ioctl(fd, LOOP_GET_STATUS64, &li); 185a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0 && errno == ENXIO) 186a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat break; 187a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 1888da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat close(fd); 1898da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat 190a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (rc < 0) { 19197ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to get loop status for %s (%s)", filename, 192a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat strerror(errno)); 193a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 194a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 195a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 196a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 197a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (i == LOOP_MAX) { 19897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Exhausted all loop devices"); 199a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOSPC; 200a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 201a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 202a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 2032152266deb82f96ef5a22d3a56a76bf6177e1e04Henrik Baard strlcpy(loopDeviceBuffer, filename, len); 204a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 2058da6bcb006f4e4257cdd685e35e910a6334f6ceaSan Mehat int file_fd; 206a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 207ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((file_fd = open(loopFile, O_RDWR | O_CLOEXEC)) < 0) { 20897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Unable to open %s (%s)", loopFile, strerror(errno)); 209a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 210a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 211a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 212a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 213a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (ioctl(fd, LOOP_SET_FD, file_fd) < 0) { 21497ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error setting up loopback interface (%s)", strerror(errno)); 215a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 216a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 217a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 218a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 219a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 220508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root struct loop_info64 li; 221a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 222a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat memset(&li, 0, sizeof(li)); 223092aa1c585fedd9e169eece41b8a471f1739908aPeter Bohm strlcpy((char*) li.lo_crypt_name, id, LO_NAME_SIZE); 224092aa1c585fedd9e169eece41b8a471f1739908aPeter Bohm strlcpy((char*) li.lo_file_name, loopFile, LO_NAME_SIZE); 225a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 226508c0e1605b795bbb51cb47d955b89f3df26ca94Kenny Root if (ioctl(fd, LOOP_SET_STATUS64, &li) < 0) { 22797ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Error setting loopback status (%s)", strerror(errno)); 228a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 229a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 230a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 231a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 232a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 233a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(fd); 234a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(file_fd); 235a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 236a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 237a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 238a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 239fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkeyint Loop::create(const std::string& target, std::string& out_device) { 240fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey unique_fd ctl_fd(open("/dev/loop-control", O_RDWR | O_CLOEXEC)); 241fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (ctl_fd.get() == -1) { 242fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to open loop-control"; 243fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return -errno; 244fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 245fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 246fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey int num = ioctl(ctl_fd.get(), LOOP_CTL_GET_FREE); 247fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (num == -1) { 248fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed LOOP_CTL_GET_FREE"; 249fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return -errno; 250fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 251fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 252fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey out_device = StringPrintf("/dev/block/loop%d", num); 253fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 254fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey unique_fd target_fd(open(target.c_str(), O_RDWR | O_CLOEXEC)); 255fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (target_fd.get() == -1) { 256fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to open " << target; 257fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return -errno; 258fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 259fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey unique_fd device_fd(open(out_device.c_str(), O_RDWR | O_CLOEXEC)); 260fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (device_fd.get() == -1) { 261fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to open " << out_device; 262fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return -errno; 263fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 264fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 265fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (ioctl(device_fd.get(), LOOP_SET_FD, target_fd.get()) == -1) { 266fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to LOOP_SET_FD"; 267fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return -errno; 268fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 269fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 270fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey return 0; 271fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey} 272fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey 273a19b250bd273455933ca3502cf2c2e0a803aff77San Mehatint Loop::destroyByDevice(const char *loopDevice) { 274a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat int device_fd; 275a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 276ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey device_fd = open(loopDevice, O_RDONLY | O_CLOEXEC); 277a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (device_fd < 0) { 27897ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to open loop (%d)", errno); 279a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 280a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 281a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 282a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat if (ioctl(device_fd, LOOP_CLR_FD, 0) < 0) { 28397ac40e4e6f3ed0bd5d6878d7d8d4a54fcaecb76San Mehat SLOGE("Failed to destroy loop (%d)", errno); 284a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(device_fd); 285a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 286a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 287a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 288a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat close(device_fd); 289a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return 0; 290a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 291a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 2923e971277db0d87652af5622c989233e7159ab909Mark Salyzynint Loop::destroyByFile(const char * /*loopFile*/) { 293a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat errno = ENOSYS; 294a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat return -1; 295a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 296a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat 297a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowakint Loop::createImageFile(const char *file, unsigned long numSectors) { 298fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey unique_fd fd(open(file, O_CREAT | O_WRONLY | O_TRUNC | O_CLOEXEC, 0600)); 299fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (fd.get() == -1) { 300fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to create image " << file; 301fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey return -errno; 302a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat } 303fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (fallocate(fd.get(), 0, 0, numSectors * 512) == -1) { 304fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(WARNING) << "Failed to fallocate; falling back to ftruncate"; 305fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey if (ftruncate(fd, numSectors * 512) == -1) { 306fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey PLOG(ERROR) << "Failed to ftruncate"; 307fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey return -errno; 308fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 309fa1c677c1ac6fae00653d41cf85ff9951d57f7b1Jeff Sharkey } 310fd3dc3c076f30e19e7ac902ba0531c6bcfe2e042Jeff Sharkey return 0; 311a19b250bd273455933ca3502cf2c2e0a803aff77San Mehat} 312344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 313a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowakint Loop::resizeImageFile(const char *file, unsigned long numSectors) { 314fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg int fd; 315fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 316ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(file, O_RDWR | O_CLOEXEC)) < 0) { 317fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error opening imagefile (%s)", strerror(errno)); 318fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 319fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 320fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 321a4f48d0f44d09b6a9a3b16f6c0121ffd5123eef3Mateusz Nowak SLOGD("Attempting to increase size of %s to %lu sectors.", file, numSectors); 322fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 323fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (fallocate(fd, 0, 0, numSectors * 512)) { 32443ed123d3fc1a3edf3660cd0e2528e971abc399eJeff Sharkey if (errno == ENOSYS || errno == ENOTSUP) { 325fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGW("fallocate not found. Falling back to ftruncate."); 326fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg if (ftruncate(fd, numSectors * 512) < 0) { 327fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error truncating imagefile (%s)", strerror(errno)); 328fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 329fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 330fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 331fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } else { 332fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg SLOGE("Error allocating space (%s)", strerror(errno)); 333fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 334fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return -1; 335fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 336fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg } 337fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg close(fd); 338fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg return 0; 339fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg} 340fcd34a0ddd45db83b7bc71ff47cba9b789089fddDaniel Rosenberg 34114eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawaint Loop::lookupInfo(const char *loopDevice, struct asec_superblock *sb, unsigned long *nr_sec) { 342344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root int fd; 343344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root struct asec_superblock buffer; 344344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 345ce6a913aeac7db94a41362c63bab74092767bb3eJeff Sharkey if ((fd = open(loopDevice, O_RDONLY | O_CLOEXEC)) < 0) { 346344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("Failed to open loopdevice (%s)", strerror(errno)); 347344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 348344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 349344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 350344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 35114eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa get_blkdev_size(fd, nr_sec); 35214eab550e8a4f28889cc9ffbb92ddff8f18c4f03Hiroaki Miyazawa if (*nr_sec == 0) { 353344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("Failed to get loop size (%s)", strerror(errno)); 354344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 355344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 356344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 357344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 358344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 359344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root /* 360344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Try to read superblock. 361344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root */ 362344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root memset(&buffer, 0, sizeof(struct asec_superblock)); 363344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root if (lseek(fd, ((*nr_sec - 1) * 512), SEEK_SET) < 0) { 364344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("lseek failed (%s)", strerror(errno)); 365344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 366344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 367344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 368344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 369344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root if (read(fd, &buffer, sizeof(struct asec_superblock)) != sizeof(struct asec_superblock)) { 370344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root SLOGE("superblock read failed (%s)", strerror(errno)); 371344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 372344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root destroyByDevice(loopDevice); 373344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return -1; 374344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root } 375344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root close(fd); 376344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root 377344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root /* 378344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root * Superblock successfully read. Copy to caller's struct. 379344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root */ 380344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root memcpy(sb, &buffer, sizeof(struct asec_superblock)); 381344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root return 0; 382344ca10856f3d3087a3288ce8f91ad83665d93fbKenny Root} 383