| | |
| | | #include <valgrind/memcheck.h> |
| | | #endif |
| | | |
| | | #ifdef USE_DISK_MODEL |
| | | #define PARSE_ID_FUNC parse_disk_id |
| | | #define ID_FOLDER "/dev/disk/by-id" |
| | | #else |
| | | //#ifdef USE_DISK_MODEL |
| | | ///#define PARSE_ID_FUNC parse_disk_id |
| | | //#define ID_FOLDER "/dev/disk/by-id" |
| | | //#else |
| | | #define PARSE_ID_FUNC parseUUID |
| | | #define ID_FOLDER "/dev/disk/by-uuid" |
| | | #endif |
| | | //#endif |
| | | #ifdef USE_DBUS |
| | | #include <dbus-1.0/dbus/dbus.h> |
| | | #endif |
| | |
| | | return source.substr(startpos, endpos - startpos); |
| | | } |
| | | |
| | | FUNCTION_RETURN parse_blkid(const std::string &blkid_file_content, std::vector<DiskInfo> &diskInfos_out) { |
| | | FUNCTION_RETURN parse_blkid(const std::string &blkid_file_content, std::vector<DiskInfo> &diskInfos_out, |
| | | std::unordered_map<std::string, int> &disk_by_uuid) { |
| | | DiskInfo diskInfo; |
| | | int diskNum = 0; |
| | | for (std::size_t oldpos = 0, pos = 0; (pos = blkid_file_content.find("</device>", oldpos)) != std::string::npos; |
| | |
| | | std::string disk_sn = getAttribute(cur_dev, "UUID"); |
| | | parseUUID(disk_sn.c_str(), diskInfo.disk_sn, sizeof(diskInfo.disk_sn)); |
| | | std::string disk_type = getAttribute(cur_dev, "TYPE"); |
| | | disk_by_uuid.insert(std::pair<std::string, int>(disk_sn, diskInfo.id)); |
| | | // unlikely that somebody put the swap on a removable disk. |
| | | // this is a first rough guess on what can be a preferred disk for blkid devices |
| | | // just in case /etc/fstab can't be accessed or it is not up to date. |
| | |
| | | |
| | | #define BLKID_LOCATIONS {"/run/blkid/blkid.tab", "/etc/blkid.tab"}; |
| | | |
| | | static FUNCTION_RETURN getDiskInfos_blkid(std::vector<DiskInfo> &diskInfos) { |
| | | static FUNCTION_RETURN getDiskInfos_blkid(std::vector<DiskInfo> &diskInfos, |
| | | std::unordered_map<std::string, int> &disk_by_uuid) { |
| | | const char *strs[] = BLKID_LOCATIONS; |
| | | bool can_read = false; |
| | | std::stringstream buffer; |
| | |
| | | return FUNCTION_RETURN::FUNC_RET_NOT_AVAIL; |
| | | } |
| | | |
| | | return parse_blkid(buffer.str(), diskInfos); |
| | | return parse_blkid(buffer.str(), diskInfos, disk_by_uuid); |
| | | } |
| | | |
| | | #define MAX_UNITS 40 |
| | | FUNCTION_RETURN getDiskInfos_dev(std::vector<DiskInfo> &diskInfos) { |
| | | struct dirent *dir = NULL; |
| | | |
| | | static void read_disk_labels(std::vector<DiskInfo> &disk_infos) { |
| | | struct stat sym_stat; |
| | | FUNCTION_RETURN result; |
| | | struct dirent *dir; |
| | | |
| | | DIR *disk_by_uuid_dir = opendir(ID_FOLDER); |
| | | if (disk_by_uuid_dir == nullptr) { |
| | | LOG_DEBUG("Open " ID_FOLDER " fail: %s", std::strerror(errno)); |
| | | } else { |
| | | const std::string base_dir(ID_FOLDER "/"); |
| | | while ((dir = readdir(disk_by_uuid_dir)) != nullptr && diskInfos.size() < MAX_UNITS) { |
| | | if (strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0 || |
| | | strncmp(dir->d_name, "usb", 3) == 0) { |
| | | continue; |
| | | } |
| | | |
| | | std::string cur_dir = base_dir + dir->d_name; |
| | | if (stat(cur_dir.c_str(), &sym_stat) == 0) { |
| | | DiskInfo tmpDiskInfo; |
| | | tmpDiskInfo.id = sym_stat.st_ino; |
| | | ssize_t len = ::readlink(cur_dir.c_str(), tmpDiskInfo.device, sizeof(tmpDiskInfo.device) - 1); |
| | | if (len != -1) { |
| | | tmpDiskInfo.device[len] = '\0'; |
| | | PARSE_ID_FUNC(dir->d_name, tmpDiskInfo.disk_sn, sizeof(tmpDiskInfo.disk_sn)); |
| | | tmpDiskInfo.sn_initialized = true; |
| | | tmpDiskInfo.label_initialized = false; |
| | | tmpDiskInfo.preferred = false; |
| | | bool found = false; |
| | | for (auto diskInfo : diskInfos) { |
| | | if (tmpDiskInfo.id == diskInfo.id) { |
| | | found = true; |
| | | break; |
| | | } |
| | | } |
| | | if (!found) { |
| | | LOG_DEBUG("Found disk inode %d device %s, sn %s", sym_stat.st_ino, tmpDiskInfo.device, |
| | | dir->d_name); |
| | | diskInfos.push_back(tmpDiskInfo); |
| | | } |
| | | } else { |
| | | LOG_DEBUG("Error %s during readlink of %s", std::strerror(errno), cur_dir.c_str()); |
| | | } |
| | | } else { |
| | | LOG_DEBUG("Error %s during stat of %s", std::strerror(errno), cur_dir.c_str()); |
| | | } |
| | | } |
| | | closedir(disk_by_uuid_dir); |
| | | } |
| | | |
| | | result = diskInfos.size() > 0 ? FUNCTION_RETURN::FUNC_RET_OK : FUNCTION_RETURN::FUNC_RET_NOT_AVAIL; |
| | | const std::string label_dir("/dev/disk/by-label"); |
| | | std::string label_dir("/dev/disk/by-label"); |
| | | DIR *disk_by_label = opendir(label_dir.c_str()); |
| | | if (disk_by_label == nullptr) { |
| | | label_dir = "/dev/disk/by-partlabel"; |
| | | disk_by_label = opendir(label_dir.c_str()); |
| | | } |
| | | if (disk_by_label != nullptr) { |
| | | while ((dir = readdir(disk_by_label)) != nullptr) { |
| | | if (strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0) { |
| | |
| | | std::string cur_disk_label = label_dir + "/" + dir->d_name; |
| | | if (stat(cur_disk_label.c_str(), &sym_stat) == 0) { |
| | | bool found = false; |
| | | for (auto diskInfo : diskInfos) { |
| | | if (((int)sym_stat.st_ino) == diskInfo.id) { |
| | | for (auto &diskInfo : disk_infos) { |
| | | if (((int)(sym_stat.st_ino)) == diskInfo.id) { |
| | | strncpy(diskInfo.label, dir->d_name, 255 - 1); |
| | | diskInfo.label_initialized = true; |
| | | LOG_DEBUG("Label for disk ino %d device %s, set to %s", sym_stat.st_ino, diskInfo.device, |
| | | diskInfo.label); |
| | | break; |
| | | } |
| | | } |
| | |
| | | } else { |
| | | LOG_DEBUG("Open %s for reading disk labels fail: %s", label_dir.c_str(), std::strerror(errno)); |
| | | } |
| | | } |
| | | |
| | | FUNCTION_RETURN getDiskInfos_dev(std::vector<DiskInfo> &disk_infos, |
| | | std::unordered_map<std::string, int> &disk_by_uuid) { |
| | | struct dirent *dir = NULL; |
| | | struct stat sym_stat; |
| | | FUNCTION_RETURN result; |
| | | char device_name[MAX_PATH]; |
| | | |
| | | DIR *disk_by_uuid_dir = opendir(ID_FOLDER); |
| | | if (disk_by_uuid_dir == nullptr) { |
| | | LOG_DEBUG("Open " ID_FOLDER " fail: %s", std::strerror(errno)); |
| | | } else { |
| | | const std::string base_dir(ID_FOLDER "/"); |
| | | while ((dir = readdir(disk_by_uuid_dir)) != nullptr && disk_infos.size() < MAX_UNITS) { |
| | | if (::strcmp(dir->d_name, ".") == 0 || ::strcmp(dir->d_name, "..") == 0 || |
| | | ::strncmp(dir->d_name, "usb", 3) == 0) { |
| | | continue; |
| | | } |
| | | |
| | | std::string cur_dir = base_dir + dir->d_name; |
| | | if (stat(cur_dir.c_str(), &sym_stat) == 0) { |
| | | DiskInfo tmpDiskInfo; |
| | | tmpDiskInfo.id = sym_stat.st_ino; |
| | | ssize_t len = ::readlink(cur_dir.c_str(), device_name, MAX_PATH - 1); |
| | | if (len != -1) { |
| | | device_name[len] = '\0'; |
| | | std::string device_name_s(device_name, len); |
| | | auto pos = device_name_s.find_last_of("/"); |
| | | if (pos != std::string::npos) { |
| | | device_name_s = device_name_s.substr(pos + 1); |
| | | } |
| | | strncpy(tmpDiskInfo.device, device_name_s.c_str(), sizeof(tmpDiskInfo.device)); |
| | | PARSE_ID_FUNC(dir->d_name, tmpDiskInfo.disk_sn, sizeof(tmpDiskInfo.disk_sn)); |
| | | tmpDiskInfo.sn_initialized = true; |
| | | tmpDiskInfo.label_initialized = false; |
| | | tmpDiskInfo.preferred = false; |
| | | bool found = false; |
| | | for (auto diskInfo : disk_infos) { |
| | | if (tmpDiskInfo.id == diskInfo.id) { |
| | | found = true; |
| | | break; |
| | | } |
| | | } |
| | | disk_by_uuid.insert(std::pair<std::string, int>(std::string(dir->d_name), tmpDiskInfo.id)); |
| | | if (!found) { |
| | | LOG_DEBUG("Found disk inode %d device %s, sn %s", sym_stat.st_ino, tmpDiskInfo.device, |
| | | dir->d_name); |
| | | disk_infos.push_back(tmpDiskInfo); |
| | | } |
| | | } else { |
| | | LOG_DEBUG("Error %s during readlink of %s", std::strerror(errno), cur_dir.c_str()); |
| | | } |
| | | } else { |
| | | LOG_DEBUG("Error %s during stat of %s", std::strerror(errno), cur_dir.c_str()); |
| | | } |
| | | } |
| | | closedir(disk_by_uuid_dir); |
| | | } |
| | | |
| | | result = disk_infos.size() > 0 ? FUNCTION_RETURN::FUNC_RET_OK : FUNCTION_RETURN::FUNC_RET_NOT_AVAIL; |
| | | read_disk_labels(disk_infos); |
| | | return result; |
| | | } |
| | | |
| | |
| | | * |
| | | * @param diskInfos |
| | | */ |
| | | static void set_preferred_disks(std::vector<DiskInfo> &diskInfos) { |
| | | static void set_preferred_disks(std::vector<DiskInfo> &diskInfos, std::unordered_map<std::string, int> &disk_by_uuid) { |
| | | FILE *fstabFile = setmntent("/etc/fstab", "r"); |
| | | if (fstabFile == nullptr) { |
| | | /*fstab not accessible*/ |
| | |
| | | struct mntent *ent; |
| | | while (nullptr != (ent = getmntent(fstabFile))) { |
| | | bool found = false; |
| | | for (auto disk_info : diskInfos) { |
| | | if (strcmp(ent->mnt_fsname, disk_info.device) == 0) { |
| | | std::string device_name_s(ent->mnt_fsname); |
| | | if (strncmp("UUID=", ent->mnt_fsname, 5) == 0) { |
| | | // fstab entry is uuid |
| | | device_name_s = device_name_s.substr(5); |
| | | auto it = disk_by_uuid.find(device_name_s); |
| | | if (it != disk_by_uuid.end()) { |
| | | for (auto &disk_info : diskInfos) { |
| | | if (it->second == disk_info.id) { |
| | | disk_info.preferred = true; |
| | | LOG_DEBUG("Disk %d device %s set as preferred", disk_info.id, disk_info.device); |
| | | break; |
| | | } |
| | | } |
| | | } else { |
| | | LOG_DEBUG("fstab device %s found, but no corresponding diskInfo", ent->mnt_fsname); |
| | | } |
| | | } else { |
| | | // fstab entry is a device |
| | | auto pos = device_name_s.find_last_of("/"); |
| | | if (pos != std::string::npos) { |
| | | device_name_s = device_name_s.substr(pos + 1); |
| | | } |
| | | |
| | | for (auto disk_info : diskInfos) { |
| | | if (device_name_s == disk_info.device) { |
| | | disk_info.preferred = true; |
| | | LOG_DEBUG("Disk %d device %s set as preferred", disk_info.id, disk_info.device); |
| | | break; |
| | | } |
| | | } |
| | | } |
| | | } |
| | |
| | | } |
| | | |
| | | /** |
| | | * First try to read disk_infos from /dev/disk/by-id folder, if fails try to use |
| | | * First try to read disk_infos from /dev/disk/by-uuid folder, if fails try to use |
| | | * blkid cache to see what's in there, then try to exclude removable disks |
| | | * looking at /etc/fstab |
| | | * @param diskInfos_out vector used to output the disk informations |
| | | * @return |
| | | */ |
| | | FUNCTION_RETURN getDiskInfos(std::vector<DiskInfo> &disk_infos) { |
| | | FUNCTION_RETURN result = getDiskInfos_dev(disk_infos); |
| | | std::unordered_map<std::string, int> disk_by_uuid; |
| | | |
| | | FUNCTION_RETURN result = getDiskInfos_dev(disk_infos, disk_by_uuid); |
| | | |
| | | if (result != FUNCTION_RETURN::FUNC_RET_OK) { |
| | | result = getDiskInfos_blkid(disk_infos); |
| | | result = getDiskInfos_blkid(disk_infos, disk_by_uuid); |
| | | } |
| | | if (result == FUNCTION_RETURN::FUNC_RET_OK) { |
| | | set_preferred_disks(disk_infos); |
| | | set_preferred_disks(disk_infos, disk_by_uuid); |
| | | } |
| | | return result; |
| | | } |