summaryrefslogtreecommitdiff
path: root/extras/volume_id/lib
diff options
context:
space:
mode:
Diffstat (limited to 'extras/volume_id/lib')
-rw-r--r--extras/volume_id/lib/Makefile3
-rw-r--r--extras/volume_id/lib/exported_symbols2
-rw-r--r--extras/volume_id/lib/gfs.c120
-rw-r--r--extras/volume_id/lib/libvolume_id.h2
-rw-r--r--extras/volume_id/lib/volume_id.c6
5 files changed, 132 insertions, 1 deletions
diff --git a/extras/volume_id/lib/Makefile b/extras/volume_id/lib/Makefile
index 8d8710d09a..90cd63e745 100644
--- a/extras/volume_id/lib/Makefile
+++ b/extras/volume_id/lib/Makefile
@@ -13,7 +13,7 @@ INSTALL_DATA = ${INSTALL} -m 644
INSTALL_LIB = ${INSTALL} -m 755
SHLIB_CUR = 0
-SHLIB_REV = 65
+SHLIB_REV = 66
SHLIB_AGE = 0
SHLIB = libvolume_id.so.$(SHLIB_CUR).$(SHLIB_REV).$(SHLIB_AGE)
@@ -45,6 +45,7 @@ OBJS= \
romfs.o \
sysv.o \
minix.o \
+ gfs.o \
luks.o \
ocfs.o \
vxfs.o \
diff --git a/extras/volume_id/lib/exported_symbols b/extras/volume_id/lib/exported_symbols
index df5f9f05c9..3f10ec0c78 100644
--- a/extras/volume_id/lib/exported_symbols
+++ b/extras/volume_id/lib/exported_symbols
@@ -27,6 +27,8 @@
volume_id_probe_xfs;
volume_id_probe_squashfs;
volume_id_probe_netware;
+ volume_id_probe_gfs;
+ volume_id_probe_gfs2;
volume_id_probe_linux_raid;
volume_id_probe_lvm1;
diff --git a/extras/volume_id/lib/gfs.c b/extras/volume_id/lib/gfs.c
new file mode 100644
index 0000000000..40a4493b32
--- /dev/null
+++ b/extras/volume_id/lib/gfs.c
@@ -0,0 +1,120 @@
+/*
+ * 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 version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "libvolume_id.h"
+#include "util.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];
+ /* In gfs1, quota and license dinodes followed */
+} PACKED;
+
+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%llx", (unsigned long long) 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 &&
+ be32_to_cpu(sbd->sb_header.mh_format) == GFS_FORMAT_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;
+ 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)
+{
+ return volume_id_probe_gfs_generic(id, off, 1);
+}
+
+int volume_id_probe_gfs2(struct volume_id *id, uint64_t off)
+{
+ return volume_id_probe_gfs_generic(id, off, 2);
+}
diff --git a/extras/volume_id/lib/libvolume_id.h b/extras/volume_id/lib/libvolume_id.h
index df9fcd9891..e34f4679e7 100644
--- a/extras/volume_id/lib/libvolume_id.h
+++ b/extras/volume_id/lib/libvolume_id.h
@@ -89,6 +89,8 @@ extern int volume_id_probe_vxfs(struct volume_id *id, uint64_t off);
extern int volume_id_probe_xfs(struct volume_id *id, uint64_t off);
extern int volume_id_probe_squashfs(struct volume_id *id, uint64_t off);
extern int volume_id_probe_netware(struct volume_id *id, uint64_t off);
+extern int volume_id_probe_gfs(struct volume_id *id, uint64_t off);
+extern int volume_id_probe_gfs2(struct volume_id *id, uint64_t off);
/* special formats */
extern int volume_id_probe_linux_swap(struct volume_id *id, uint64_t off);
diff --git a/extras/volume_id/lib/volume_id.c b/extras/volume_id/lib/volume_id.c
index fd95e7d3b0..bcdbe2feaa 100644
--- a/extras/volume_id/lib/volume_id.c
+++ b/extras/volume_id/lib/volume_id.c
@@ -171,6 +171,12 @@ int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size
if (volume_id_probe_netware(id, off) == 0)
goto found;
+ if (volume_id_probe_gfs(id, off) == 0)
+ goto found;
+
+ if (volume_id_probe_gfs2(id, off) == 0)
+ goto found;
+
return -1;
found:
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 15:28:00 +0000