mirror of
https://github.com/sheumann/hush.git
synced 2024-12-27 01:32:08 +00:00
90615a0c5c
Adapted from patch created by T4ndeta <t4ndeta@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
107 lines
4.3 KiB
C
107 lines
4.3 KiB
C
/*
|
|
* volume_id - reads filesystem label and uuid
|
|
*
|
|
* Copyright (C) Andre Masella <andre@masella.no-ip.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
|
|
*/
|
|
|
|
#include "volume_id_internal.h"
|
|
|
|
/* All these values are taken from ocfs2-tools's ocfs2_fs.h */
|
|
#define OCFS2_VOL_UUID_LEN 16
|
|
#define OCFS2_MAX_VOL_LABEL_LEN 64
|
|
#define OCFS2_SUPERBLOCK_OFFSET 0x2000
|
|
|
|
|
|
/* This is the superblock. The OCFS2 header files have structs in structs.
|
|
This is one has been simplified since we only care about the superblock.
|
|
*/
|
|
|
|
struct ocfs2_super_block {
|
|
uint8_t i_signature[8]; /* Signature for validation */
|
|
uint32_t i_generation; /* Generation number */
|
|
int16_t i_suballoc_slot; /* Slot suballocator this inode belongs to */
|
|
uint16_t i_suballoc_bit; /* Bit offset in suballocator block group */
|
|
uint32_t i_reserved0;
|
|
uint32_t i_clusters; /* Cluster count */
|
|
uint32_t i_uid; /* Owner UID */
|
|
uint32_t i_gid; /* Owning GID */
|
|
uint64_t i_size; /* Size in bytes */
|
|
uint16_t i_mode; /* File mode */
|
|
uint16_t i_links_count; /* Links count */
|
|
uint32_t i_flags; /* File flags */
|
|
uint64_t i_atime; /* Access time */
|
|
uint64_t i_ctime; /* Creation time */
|
|
uint64_t i_mtime; /* Modification time */
|
|
uint64_t i_dtime; /* Deletion time */
|
|
uint64_t i_blkno; /* Offset on disk, in blocks */
|
|
uint64_t i_last_eb_blk; /* Pointer to last extent block */
|
|
uint32_t i_fs_generation; /* Generation per fs-instance */
|
|
uint32_t i_atime_nsec;
|
|
uint32_t i_ctime_nsec;
|
|
uint32_t i_mtime_nsec;
|
|
uint64_t i_reserved1[9];
|
|
uint64_t i_pad1; /* Generic way to refer to this 64bit union */
|
|
/* Normally there is a union of the different block types, but we only care about the superblock. */
|
|
uint16_t s_major_rev_level;
|
|
uint16_t s_minor_rev_level;
|
|
uint16_t s_mnt_count;
|
|
int16_t s_max_mnt_count;
|
|
uint16_t s_state; /* File system state */
|
|
uint16_t s_errors; /* Behaviour when detecting errors */
|
|
uint32_t s_checkinterval; /* Max time between checks */
|
|
uint64_t s_lastcheck; /* Time of last check */
|
|
uint32_t s_creator_os; /* OS */
|
|
uint32_t s_feature_compat; /* Compatible feature set */
|
|
uint32_t s_feature_incompat; /* Incompatible feature set */
|
|
uint32_t s_feature_ro_compat; /* Readonly-compatible feature set */
|
|
uint64_t s_root_blkno; /* Offset, in blocks, of root directory dinode */
|
|
uint64_t s_system_dir_blkno; /* Offset, in blocks, of system directory dinode */
|
|
uint32_t s_blocksize_bits; /* Blocksize for this fs */
|
|
uint32_t s_clustersize_bits; /* Clustersize for this fs */
|
|
uint16_t s_max_slots; /* Max number of simultaneous mounts before tunefs required */
|
|
uint16_t s_reserved1;
|
|
uint32_t s_reserved2;
|
|
uint64_t s_first_cluster_group; /* Block offset of 1st cluster group header */
|
|
uint8_t s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
|
|
uint8_t s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
|
|
} PACKED;
|
|
|
|
int FAST_FUNC volume_id_probe_ocfs2(struct volume_id *id /*,uint64_t off*/)
|
|
{
|
|
#define off ((uint64_t)0)
|
|
struct ocfs2_super_block *os;
|
|
|
|
dbg("probing at offset 0x%llx", (unsigned long long) off);
|
|
|
|
os = volume_id_get_buffer(id, off + OCFS2_SUPERBLOCK_OFFSET, 0x200);
|
|
if (os == NULL)
|
|
return -1;
|
|
|
|
if (memcmp(os->i_signature, "OCFSV2", 6) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
|
|
// volume_id_set_label_raw(id, os->s_label, OCFS2_MAX_VOL_LABEL_LEN < VOLUME_ID_LABEL_SIZE ?
|
|
// OCFS2_MAX_VOL_LABEL_LEN : VOLUME_ID_LABEL_SIZE);
|
|
volume_id_set_label_string(id, os->s_label, OCFS2_MAX_VOL_LABEL_LEN < VOLUME_ID_LABEL_SIZE ?
|
|
OCFS2_MAX_VOL_LABEL_LEN : VOLUME_ID_LABEL_SIZE);
|
|
volume_id_set_uuid(id, os->s_uuid, UUID_DCE);
|
|
IF_FEATURE_BLKID_TYPE(id->type = "ocfs2";)
|
|
return 0;
|
|
}
|