mirror of
https://github.com/systemd/systemd-stable.git
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195 lines
4.7 KiB
C
195 lines
4.7 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2004 Andre Masella <andre@masella.no-ip.org>
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* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "libvolume_id.h"
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#include "util.h"
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struct ocfs1_super_block_header {
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uint32_t minor_version;
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uint32_t major_version;
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uint8_t signature[128];
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uint8_t mount_point[128];
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uint64_t serial_num;
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uint64_t device_size;
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uint64_t start_off;
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uint64_t bitmap_off;
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uint64_t publ_off;
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uint64_t vote_off;
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uint64_t root_bitmap_off;
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uint64_t data_start_off;
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uint64_t root_bitmap_size;
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uint64_t root_off;
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uint64_t root_size;
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uint64_t cluster_size;
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uint64_t num_nodes;
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uint64_t num_clusters;
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uint64_t dir_node_size;
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uint64_t file_node_size;
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uint64_t internal_off;
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uint64_t node_cfg_off;
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uint64_t node_cfg_size;
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uint64_t new_cfg_off;
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uint32_t prot_bits;
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int32_t excl_mount;
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} PACKED;
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struct ocfs1_super_block_label {
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struct ocfs1_disk_lock {
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uint32_t curr_master;
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uint8_t file_lock;
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uint8_t compat_pad[3];
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uint64_t last_write_time;
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uint64_t last_read_time;
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uint32_t writer_node_num;
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uint32_t reader_node_num;
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uint64_t oin_node_map;
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uint64_t dlock_seq_num;
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} PACKED disk_lock;
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uint8_t label[64];
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uint16_t label_len;
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uint8_t vol_id[16];
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uint16_t vol_id_len;
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uint8_t cluster_name[64];
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uint16_t cluster_name_len;
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} PACKED;
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struct ocfs2_super_block {
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uint8_t i_signature[8];
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uint32_t i_generation;
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int16_t i_suballoc_slot;
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uint16_t i_suballoc_bit;
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uint32_t i_reserved0;
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uint32_t i_clusters;
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uint32_t i_uid;
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uint32_t i_gid;
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uint64_t i_size;
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uint16_t i_mode;
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uint16_t i_links_count;
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uint32_t i_flags;
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uint64_t i_atime;
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uint64_t i_ctime;
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uint64_t i_mtime;
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uint64_t i_dtime;
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uint64_t i_blkno;
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uint64_t i_last_eb_blk;
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uint32_t i_fs_generation;
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uint32_t i_atime_nsec;
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uint32_t i_ctime_nsec;
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uint32_t i_mtime_nsec;
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uint64_t i_reserved1[9];
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uint64_t i_pad1;
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uint16_t s_major_rev_level;
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uint16_t s_minor_rev_level;
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uint16_t s_mnt_count;
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int16_t s_max_mnt_count;
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uint16_t s_state;
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uint16_t s_errors;
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uint32_t s_checkinterval;
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uint64_t s_lastcheck;
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uint32_t s_creator_os;
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uint32_t s_feature_compat;
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uint32_t s_feature_incompat;
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uint32_t s_feature_ro_compat;
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uint64_t s_root_blkno;
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uint64_t s_system_dir_blkno;
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uint32_t s_blocksize_bits;
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uint32_t s_clustersize_bits;
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uint16_t s_max_slots;
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uint16_t s_reserved1;
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uint32_t s_reserved2;
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uint64_t s_first_cluster_group;
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uint8_t s_label[64];
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uint8_t s_uuid[16];
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} PACKED;
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int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off, uint64_t size)
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{
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const uint8_t *buf;
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struct ocfs1_super_block_header *osh;
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struct ocfs1_super_block_label *osl;
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info("probing at offset 0x%llx", (unsigned long long) off);
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buf = volume_id_get_buffer(id, off, 0x200);
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if (buf == NULL)
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return -1;
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osh = (struct ocfs1_super_block_header *) buf;
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if (memcmp(osh->signature, "OracleCFS", 9) != 0)
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return -1;
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snprintf(id->type_version, sizeof(id->type_version)-1,
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"%u.%u", osh->major_version, osh->minor_version);
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dbg("found OracleCFS signature, now reading label");
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buf = volume_id_get_buffer(id, off + 0x200, 0x200);
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if (buf == NULL)
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return -1;
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osl = (struct ocfs1_super_block_label *) buf;
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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if (osl->label_len <= 64) {
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volume_id_set_label_raw(id, osl->label, 64);
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volume_id_set_label_string(id, osl->label, 64);
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}
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if (osl->vol_id_len == 16)
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volume_id_set_uuid(id, osl->vol_id, 0, UUID_DCE);
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id->type = "ocfs";
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return 0;
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}
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#define OCFS2_MAX_BLOCKSIZE 0x1000
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#define OCFS2_SUPER_BLOCK_BLKNO 2
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int volume_id_probe_ocfs2(struct volume_id *id, uint64_t off, uint64_t size)
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{
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const uint8_t *buf;
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struct ocfs2_super_block *os;
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size_t blksize;
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info("probing at offset 0x%llx", (unsigned long long) off);
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for (blksize = 0x200; blksize <= OCFS2_MAX_BLOCKSIZE; blksize <<= 1) {
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buf = volume_id_get_buffer(id, off + OCFS2_SUPER_BLOCK_BLKNO * blksize, 0x200);
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if (buf == NULL)
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return -1;
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os = (struct ocfs2_super_block *) buf;
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if (memcmp(os->i_signature, "OCFSV2", 6) != 0)
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continue;
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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volume_id_set_label_raw(id, os->s_label, 64);
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volume_id_set_label_string(id, os->s_label, 64);
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volume_id_set_uuid(id, os->s_uuid, 0, UUID_DCE);
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snprintf(id->type_version, sizeof(id->type_version)-1,
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"%u.%u", os->s_major_rev_level, os->s_minor_rev_level);
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id->type = "ocfs2";
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return 0;
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}
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return -1;
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}
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