diff options
Diffstat (limited to 'extras/volume_id/lib/gfs.c')
| -rw-r--r-- | extras/volume_id/lib/gfs.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/extras/volume_id/lib/gfs.c b/extras/volume_id/lib/gfs.c deleted file mode 100644 index d97730c7a4..0000000000 --- a/extras/volume_id/lib/gfs.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * volume_id - reads filesystem label and uuid - * - * Copyright (C) 2006 Red Hat, Inc. <redhat.com> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef _GNU_SOURCE -#define _GNU_SOURCE 1 -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <errno.h> -#include <ctype.h> - -#include "libvolume_id.h" -#include "libvolume_id-private.h" - -/* Common gfs/gfs2 constants: */ -#define GFS_MAGIC 0x01161970 -#define GFS_DEFAULT_BSIZE 4096 -#define GFS_SUPERBLOCK_OFFSET (0x10 * GFS_DEFAULT_BSIZE) -#define GFS_METATYPE_SB 1 -#define GFS_FORMAT_SB 100 -#define GFS_LOCKNAME_LEN 64 - -/* gfs1 constants: */ -#define GFS_FORMAT_FS 1309 -#define GFS_FORMAT_MULTI 1401 -/* gfs2 constants: */ -#define GFS2_FORMAT_FS 1801 -#define GFS2_FORMAT_MULTI 1900 - -struct gfs2_meta_header { - uint32_t mh_magic; - uint32_t mh_type; - uint64_t __pad0; /* Was generation number in gfs1 */ - uint32_t mh_format; - uint32_t __pad1; /* Was incarnation number in gfs1 */ -}; - -struct gfs2_inum { - uint64_t no_formal_ino; - uint64_t no_addr; -}; - -struct gfs2_sb { - struct gfs2_meta_header sb_header; - - uint32_t sb_fs_format; - uint32_t sb_multihost_format; - uint32_t __pad0; /* Was superblock flags in gfs1 */ - - uint32_t sb_bsize; - uint32_t sb_bsize_shift; - uint32_t __pad1; /* Was journal segment size in gfs1 */ - - struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ - struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ - struct gfs2_inum sb_root_dir; - - char sb_lockproto[GFS_LOCKNAME_LEN]; - char sb_locktable[GFS_LOCKNAME_LEN]; - - struct gfs2_inum __pad3; /* Was quota inode in gfs1 */ - struct gfs2_inum __pad4; /* Was licence inode in gfs1 */ - uint8_t sb_uuid[16]; /* The UUID maybe 0 for backwards compat */ -} PACKED; - -static int uuid_non_zero(const uint8_t *p) -{ - int i; - for (i = 0; i < 16; i++) { - if (p[i] != 0) - return 1; - } - return 0; -} - -static int volume_id_probe_gfs_generic(struct volume_id *id, uint64_t off, int vers) -{ - struct gfs2_sb *sbd; - - info("probing at offset 0x%" PRIx64 "\n", off); - - sbd = (struct gfs2_sb *) - volume_id_get_buffer(id, off + GFS_SUPERBLOCK_OFFSET, sizeof(struct gfs2_sb)); - if (sbd == NULL) - return -1; - - if (be32_to_cpu(sbd->sb_header.mh_magic) == GFS_MAGIC && - be32_to_cpu(sbd->sb_header.mh_type) == GFS_METATYPE_SB) { - if (vers == 1) { - if (be32_to_cpu(sbd->sb_fs_format) != GFS_FORMAT_FS || - be32_to_cpu(sbd->sb_multihost_format) != GFS_FORMAT_MULTI) - return -1; /* not gfs1 */ - id->type = "gfs"; - } - else if (vers == 2) { - if (be32_to_cpu(sbd->sb_fs_format) != GFS2_FORMAT_FS || - be32_to_cpu(sbd->sb_multihost_format) != GFS2_FORMAT_MULTI) - return -1; /* not gfs2 */ - id->type = "gfs2"; - } - else - return -1; - - if (strlen(sbd->sb_locktable)) { - uint8_t *label = (uint8_t *) sbd->sb_locktable; - - volume_id_set_label_raw(id, label, GFS_LOCKNAME_LEN); - volume_id_set_label_string(id, label, GFS_LOCKNAME_LEN); - } - if (vers == 2 && uuid_non_zero(sbd->sb_uuid)) - volume_id_set_uuid(id, sbd->sb_uuid, 0, UUID_DCE); - strcpy(id->type_version, "1"); - volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); - return 0; - } - return -1; -} - -int volume_id_probe_gfs(struct volume_id *id, uint64_t off, uint64_t size) -{ - return volume_id_probe_gfs_generic(id, off, 1); -} - -int volume_id_probe_gfs2(struct volume_id *id, uint64_t off, uint64_t size) -{ - return volume_id_probe_gfs_generic(id, off, 2); -} |