/* * volume_id - reads filesystem label and uuid * * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> * * 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 */ //config:config FEATURE_VOLUMEID_SYSV //config: bool "sysv filesystem" //config: default y //config: depends on VOLUMEID //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_SYSV) += sysv.o #include "volume_id_internal.h" #define SYSV_NICINOD 100 #define SYSV_NICFREE 50 struct sysv_super { uint16_t s_isize; uint16_t s_pad0; uint32_t s_fsize; uint16_t s_nfree; uint16_t s_pad1; uint32_t s_free[SYSV_NICFREE]; uint16_t s_ninode; uint16_t s_pad2; uint16_t s_inode[SYSV_NICINOD]; uint8_t s_flock; uint8_t s_ilock; uint8_t s_fmod; uint8_t s_ronly; uint32_t s_time; uint16_t s_dinfo[4]; uint32_t s_tfree; uint16_t s_tinode; uint16_t s_pad3; uint8_t s_fname[6]; uint8_t s_fpack[6]; uint32_t s_fill[12]; uint32_t s_state; uint32_t s_magic; uint32_t s_type; } PACKED; #define XENIX_NICINOD 100 #define XENIX_NICFREE 100 struct xenix_super { uint16_t s_isize; uint32_t s_fsize; uint16_t s_nfree; uint32_t s_free[XENIX_NICFREE]; uint16_t s_ninode; uint16_t s_inode[XENIX_NICINOD]; uint8_t s_flock; uint8_t s_ilock; uint8_t s_fmod; uint8_t s_ronly; uint32_t s_time; uint32_t s_tfree; uint16_t s_tinode; uint16_t s_dinfo[4]; uint8_t s_fname[6]; uint8_t s_fpack[6]; uint8_t s_clean; uint8_t s_fill[371]; uint32_t s_magic; uint32_t s_type; } PACKED; #define SYSV_SUPERBLOCK_BLOCK 0x01 #define SYSV_MAGIC 0xfd187e20 #define XENIX_SUPERBLOCK_BLOCK 0x18 #define XENIX_MAGIC 0x2b5544 #define SYSV_MAX_BLOCKSIZE 0x800 int FAST_FUNC volume_id_probe_sysv(struct volume_id *id /*,uint64_t off*/) { #define off ((uint64_t)0) struct sysv_super *vs; struct xenix_super *xs; unsigned boff; dbg("probing at offset 0x%llx", (unsigned long long) off); for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) { vs = volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200); if (vs == NULL) return -1; if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) { // volume_id_set_label_raw(id, vs->s_fname, 6); volume_id_set_label_string(id, vs->s_fname, 6); IF_FEATURE_BLKID_TYPE(id->type = "sysv"); goto found; } } for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) { xs = volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200); if (xs == NULL) return -1; if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) { // volume_id_set_label_raw(id, xs->s_fname, 6); volume_id_set_label_string(id, xs->s_fname, 6); IF_FEATURE_BLKID_TYPE(id->type = "xenix";) goto found; } } return -1; found: // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); return 0; }