Add GFS/GFS2 support to the blkid library.
Signed-off-by: Karel Zak <kzak@redhat.com>
diff --git a/lib/blkid/ChangeLog b/lib/blkid/ChangeLog
index 7835a26..4f46942 100644
--- a/lib/blkid/ChangeLog
+++ b/lib/blkid/ChangeLog
@@ -1,3 +1,7 @@
+2006-09-17 Karel Zak <kzak@redhat.com>
+
+ * probe.c (probe_gfs, _gfs2), probe.h: Add support for GFS/GFS2
+
2006-09-12 Theodore Tso <tytso@mit.edu>
* devname.c (dm_probe_all): probe_one expects device names passed
diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
index 33f15a9..f06a5d0 100644
--- a/lib/blkid/probe.c
+++ b/lib/blkid/probe.c
@@ -648,6 +648,50 @@
return 0;
}
+static int probe_gfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct gfs2_sb *sbd;
+ const char *label = 0;
+
+ sbd = (struct gfs2_sb *)buf;
+
+ if (blkid_be32(sbd->sb_fs_format) == GFS_FORMAT_FS &&
+ blkid_be32(sbd->sb_multihost_format) == GFS_FORMAT_MULTI)
+ {
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+
+ if (strlen(sbd->sb_locktable))
+ label = sbd->sb_locktable;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(sbd->sb_locktable));
+ return 0;
+ }
+ return 1;
+}
+
+static int probe_gfs2(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct gfs2_sb *sbd;
+ const char *label = 0;
+
+ sbd = (struct gfs2_sb *)buf;
+
+ if (blkid_be32(sbd->sb_fs_format) == GFS2_FORMAT_FS &&
+ blkid_be32(sbd->sb_multihost_format) == GFS2_FORMAT_MULTI)
+ {
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+
+ if (strlen(sbd->sb_locktable))
+ label = sbd->sb_locktable;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(sbd->sb_locktable));
+ return 0;
+ }
+ return 1;
+}
+
/*
* BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
* in the type_array table below + bim_kbalign.
@@ -675,6 +719,8 @@
{ "reiserfs", 64, 0x34, 8, "ReIsErFs", probe_reiserfs },
{ "reiserfs", 8, 20, 8, "ReIsErFs", probe_reiserfs },
{ "reiser4", 64, 0, 7, "ReIsEr4", probe_reiserfs4 },
+ { "gfs2", 64, 0, 4, "\x01\x16\x19\x70", probe_gfs2 },
+ { "gfs", 64, 0, 4, "\x01\x16\x19\x70", probe_gfs },
{ "vfat", 0, 0x52, 5, "MSWIN", probe_fat },
{ "vfat", 0, 0x52, 8, "FAT32 ", probe_fat },
{ "vfat", 0, 0x36, 5, "MSDOS", probe_fat },
diff --git a/lib/blkid/probe.h b/lib/blkid/probe.h
index 840e526..88bf311 100644
--- a/lib/blkid/probe.h
+++ b/lib/blkid/probe.h
@@ -345,6 +345,54 @@
unsigned char escape_sequences[8];
};
+/* 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 {
+ __u32 mh_magic;
+ __u32 mh_type;
+ __u64 __pad0; /* Was generation number in gfs1 */
+ __u32 mh_format;
+ __u32 __pad1; /* Was incarnation number in gfs1 */
+};
+
+struct gfs2_inum {
+ __u64 no_formal_ino;
+ __u64 no_addr;
+};
+
+struct gfs2_sb {
+ struct gfs2_meta_header sb_header;
+
+ __u32 sb_fs_format;
+ __u32 sb_multihost_format;
+ __u32 __pad0; /* Was superblock flags in gfs1 */
+
+ __u32 sb_bsize;
+ __u32 sb_bsize_shift;
+ __u32 __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 */
+};
+
/*
* Byte swap functions
*/