/* * volume_id - reads filesystem label and uuid * * Copyright (C) 2005 Kay Sievers * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ //kbuild:lib-$(CONFIG_VOLUMEID) += volume_id.o util.o #include "volume_id_internal.h" /* Some detection routines do not set label or uuid anyway, * so they are disabled. */ /* Looks for partitions, we don't use it: */ #define ENABLE_FEATURE_VOLUMEID_MAC 0 /* #define ENABLE_FEATURE_VOLUMEID_MSDOS 0 - NB: this one * was not properly added to probe table anyway - ??! */ /* None of RAIDs have label or uuid, except LinuxRAID: */ #define ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID 0 #define ENABLE_FEATURE_VOLUMEID_ISWRAID 0 #define ENABLE_FEATURE_VOLUMEID_LSIRAID 0 #define ENABLE_FEATURE_VOLUMEID_LVM 0 #define ENABLE_FEATURE_VOLUMEID_NVIDIARAID 0 #define ENABLE_FEATURE_VOLUMEID_PROMISERAID 0 #define ENABLE_FEATURE_VOLUMEID_SILICONRAID 0 #define ENABLE_FEATURE_VOLUMEID_VIARAID 0 /* These filesystems also have no label or uuid: */ #define ENABLE_FEATURE_VOLUMEID_MINIX 0 #define ENABLE_FEATURE_VOLUMEID_HPFS 0 #define ENABLE_FEATURE_VOLUMEID_UFS 0 typedef int FAST_FUNC (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size); typedef int FAST_FUNC (*probe_fptr)(struct volume_id *id /*, uint64_t off*/); static const raid_probe_fptr raid1[] = { #if ENABLE_FEATURE_VOLUMEID_LINUXRAID volume_id_probe_linux_raid, #endif #if ENABLE_FEATURE_VOLUMEID_ISWRAID volume_id_probe_intel_software_raid, #endif #if ENABLE_FEATURE_VOLUMEID_LSIRAID volume_id_probe_lsi_mega_raid, #endif #if ENABLE_FEATURE_VOLUMEID_VIARAID volume_id_probe_via_raid, #endif #if ENABLE_FEATURE_VOLUMEID_SILICONRAID volume_id_probe_silicon_medley_raid, #endif #if ENABLE_FEATURE_VOLUMEID_NVIDIARAID volume_id_probe_nvidia_raid, #endif #if ENABLE_FEATURE_VOLUMEID_PROMISERAID volume_id_probe_promise_fasttrack_raid, #endif #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID volume_id_probe_highpoint_45x_raid, #endif }; static const probe_fptr raid2[] = { #if ENABLE_FEATURE_VOLUMEID_LVM volume_id_probe_lvm1, volume_id_probe_lvm2, #endif #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID volume_id_probe_highpoint_37x_raid, #endif #if ENABLE_FEATURE_VOLUMEID_LUKS volume_id_probe_luks, #endif }; /* signature in the first block, only small buffer needed */ static const probe_fptr fs1[] = { #if ENABLE_FEATURE_VOLUMEID_FAT volume_id_probe_vfat, #endif #if ENABLE_FEATURE_VOLUMEID_EXFAT volume_id_probe_exfat, #endif #if ENABLE_FEATURE_VOLUMEID_MAC volume_id_probe_mac_partition_map, #endif #if ENABLE_FEATURE_VOLUMEID_SQUASHFS volume_id_probe_squashfs, #endif #if ENABLE_FEATURE_VOLUMEID_XFS volume_id_probe_xfs, #endif }; /* fill buffer with maximum */ static const probe_fptr fs2[] = { #if ENABLE_FEATURE_VOLUMEID_LINUXSWAP volume_id_probe_linux_swap, #endif #if ENABLE_FEATURE_VOLUMEID_EXT volume_id_probe_ext, #endif #if ENABLE_FEATURE_VOLUMEID_BTRFS volume_id_probe_btrfs, #endif #if ENABLE_FEATURE_VOLUMEID_REISERFS volume_id_probe_reiserfs, #endif #if ENABLE_FEATURE_VOLUMEID_JFS volume_id_probe_jfs, #endif #if ENABLE_FEATURE_VOLUMEID_UDF volume_id_probe_udf, #endif #if ENABLE_FEATURE_VOLUMEID_ISO9660 volume_id_probe_iso9660, #endif #if ENABLE_FEATURE_VOLUMEID_HFS volume_id_probe_hfs_hfsplus, #endif #if ENABLE_FEATURE_VOLUMEID_UFS volume_id_probe_ufs, #endif #if ENABLE_FEATURE_VOLUMEID_F2FS volume_id_probe_f2fs, #endif #if ENABLE_FEATURE_VOLUMEID_NILFS volume_id_probe_nilfs, #endif #if ENABLE_FEATURE_VOLUMEID_NTFS volume_id_probe_ntfs, #endif #if ENABLE_FEATURE_VOLUMEID_CRAMFS volume_id_probe_cramfs, #endif #if ENABLE_FEATURE_VOLUMEID_ROMFS volume_id_probe_romfs, #endif #if ENABLE_FEATURE_VOLUMEID_HPFS volume_id_probe_hpfs, #endif #if ENABLE_FEATURE_VOLUMEID_SYSV volume_id_probe_sysv, #endif #if ENABLE_FEATURE_VOLUMEID_MINIX volume_id_probe_minix, #endif #if ENABLE_FEATURE_VOLUMEID_OCFS2 volume_id_probe_ocfs2, #endif }; int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size) { unsigned i; /* probe for raid first, cause fs probes may be successful on raid members */ if (size) { for (i = 0; i < ARRAY_SIZE(raid1); i++) { if (raid1[i](id, /*off,*/ size) == 0) goto ret; if (id->error) goto ret; } } for (i = 0; i < ARRAY_SIZE(raid2); i++) { if (raid2[i](id /*,off*/) == 0) goto ret; if (id->error) goto ret; } /* signature in the first block, only small buffer needed */ for (i = 0; i < ARRAY_SIZE(fs1); i++) { if (fs1[i](id /*,off*/) == 0) goto ret; if (id->error) goto ret; } /* fill buffer with maximum */ volume_id_get_buffer(id, 0, SB_BUFFER_SIZE); for (i = 0; i < ARRAY_SIZE(fs2); i++) { if (fs2[i](id /*,off*/) == 0) goto ret; if (id->error) goto ret; } ret: volume_id_free_buffer(id); return (- id->error); /* 0 or -1 */ } /* open volume by device node */ struct volume_id* FAST_FUNC volume_id_open_node(int fd) { struct volume_id *id; id = xzalloc(sizeof(struct volume_id)); id->fd = fd; ///* close fd on device close */ //id->fd_close = 1; return id; } #ifdef UNUSED /* open volume by major/minor */ struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt) { struct volume_id *id; char *tmp_node[VOLUME_ID_PATH_MAX]; tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u", (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt)); /* create temporary node to open block device */ unlink(tmp_node); if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0) bb_perror_msg_and_die("can't mknod(%s)", tmp_node); id = volume_id_open_node(tmp_node); unlink(tmp_node); free(tmp_node); return id; } #endif void FAST_FUNC free_volume_id(struct volume_id *id) { if (id == NULL) return; //if (id->fd_close != 0) - always true close(id->fd); volume_id_free_buffer(id); #ifdef UNUSED_PARTITION_CODE free(id->partitions); #endif free(id); }