Hi,
This patch implements nilfs2_idinfo to proble nilfs2 partition.
The patch probes uuid, label, version and verify crc check sum of superblock.
Signed-off-by: Jiro SEKIBA <jir@xxxxxxxxx>
---
shlibs/blkid/src/superblocks/Makefile.am | 3 +-
shlibs/blkid/src/superblocks/nilfs.c | 124 ++++++++++++++++++++++++++++
shlibs/blkid/src/superblocks/superblocks.c | 3 +-
shlibs/blkid/src/superblocks/superblocks.h | 1 +
4 files changed, 129 insertions(+), 2 deletions(-)
create mode 100644 shlibs/blkid/src/superblocks/nilfs.c
diff --git a/shlibs/blkid/src/superblocks/Makefile.am b/shlibs/blkid/src/superblocks/Makefile.am
index f5b88b8..a905b16 100644
--- a/shlibs/blkid/src/superblocks/Makefile.am
+++ b/shlibs/blkid/src/superblocks/Makefile.am
@@ -46,4 +46,5 @@ libblkid_superblocks_la_SOURCES = \
bfs.c \
drbd.c \
vmfs.c \
- befs.c
+ befs.c \
+ nilfs.c
diff --git a/shlibs/blkid/src/superblocks/nilfs.c b/shlibs/blkid/src/superblocks/nilfs.c
new file mode 100644
index 0000000..b7dcaa8
--- /dev/null
+++ b/shlibs/blkid/src/superblocks/nilfs.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2010 by Jiro SEKIBA <jir@xxxxxxxxx>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License
+ */
+#include <stddef.h>
+#include <string.h>
+
+#include "superblocks.h"
+#include "crc32.h"
+
+struct nilfs_super_block {
+ uint32_t s_rev_level;
+ uint16_t s_minor_rev_level;
+ uint16_t s_magic;
+
+ uint16_t s_bytes;
+
+ uint16_t s_flags;
+ uint32_t s_crc_seed;
+ uint32_t s_sum;
+
+ uint32_t s_log_block_size;
+
+ uint64_t s_nsegments;
+ uint64_t s_dev_size;
+ uint64_t s_first_data_block;
+ uint32_t s_blocks_per_segment;
+ uint32_t s_r_segments_percentage;
+
+ uint64_t s_last_cno;
+ uint64_t s_last_pseg;
+ uint64_t s_last_seq;
+ uint64_t s_free_blocks_count;
+
+ uint64_t s_ctime;
+
+ uint64_t s_mtime;
+ uint64_t s_wtime;
+ uint16_t s_mnt_count;
+ uint16_t s_max_mnt_count;
+ uint16_t s_state;
+ uint16_t s_errors;
+ uint64_t s_lastcheck;
+
+ uint32_t s_checkinterval;
+ uint32_t s_creator_os;
+ uint16_t s_def_resuid;
+ uint16_t s_def_resgid;
+ uint32_t s_first_ino;
+
+ uint16_t s_inode_size;
+ uint16_t s_dat_entry_size;
+ uint16_t s_checkpoint_size;
+ uint16_t s_segment_usage_size;
+
+ uint8_t s_uuid[16];
+ char s_volume_name[80];
+
+ uint32_t s_c_interval;
+ uint32_t s_c_block_max;
+ uint32_t s_reserved[192];
+};
+
+/* nilfs2 magic string */
+#define NILFS_SB_MAGIC "\x34\x34"
+/* nilfs2 super block offset */
+#define NILFS_SB_OFF 0x400
+/* nilfs2 super block offset in kB */
+#define NILFS_SB_KBOFF (NILFS_SB_OFF >> 10)
+/* nilfs2 magic string offset within super block */
+#define NILFS_MAG_OFF 6
+
+static int probe_nilfs2(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ struct nilfs_super_block *sb;
+ static unsigned char sum[4];
+ const int sumoff = offsetof(struct nilfs_super_block, s_sum);
+ size_t bytes;
+ uint32_t crc;
+
+ sb = blkid_probe_get_sb(pr, mag, struct nilfs_super_block);
+ if (!sb)
+ return -1;
+
+ bytes = le32_to_cpu(sb->s_bytes);
+ crc = crc32(le32_to_cpu(sb->s_crc_seed), (unsigned char *)sb, sumoff);
+ crc = crc32(crc, sum, 4);
+ crc = crc32(crc, (unsigned char *)sb + sumoff + 4, bytes - sumoff - 4);
+
+ if (crc != le32_to_cpu(sb->s_sum))
+ return -1;
+
+ if (strlen(sb->s_volume_name))
+ blkid_probe_set_label(pr, sb->s_volume_name,
+ sizeof(sb->s_volume_name));
+
+ blkid_probe_set_uuid(pr, sb->s_uuid);
+
+ blkid_probe_sprintf_version(pr, "%u", le32_to_cpu(sb->s_rev_level));
+
+ return 0;
+}
+
+
+#define BLKID_NILFS_MAGICS \
+ { \
+ { \
+ .magic = NILFS_SB_MAGIC, \
+ .len = 2, \
+ .kboff = NILFS_SB_KBOFF, \
+ .sboff = NILFS_MAG_OFF \
+ }, \
+ { NULL } \
+ }
+
+const struct blkid_idinfo nilfs2_idinfo =
+{
+ .name = "nilfs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_nilfs2,
+ .magics = BLKID_NILFS_MAGICS
+};
diff --git a/shlibs/blkid/src/superblocks/superblocks.c b/shlibs/blkid/src/superblocks/superblocks.c
index 1d95273..8adfeef 100644
--- a/shlibs/blkid/src/superblocks/superblocks.c
+++ b/shlibs/blkid/src/superblocks/superblocks.c
@@ -140,7 +140,8 @@ static const struct blkid_idinfo *idinfos[] =
&ubifs_idinfo,
&bfs_idinfo,
&vmfs_fs_idinfo,
- &befs_idinfo
+ &befs_idinfo,
+ &nilfs2_idinfo
};
/*
diff --git a/shlibs/blkid/src/superblocks/superblocks.h b/shlibs/blkid/src/superblocks/superblocks.h
index b1fa49d..f15c94f 100644
--- a/shlibs/blkid/src/superblocks/superblocks.h
+++ b/shlibs/blkid/src/superblocks/superblocks.h
@@ -65,6 +65,7 @@ extern const struct blkid_idinfo vmfs_volume_idinfo;
extern const struct blkid_idinfo vmfs_fs_idinfo;
extern const struct blkid_idinfo drbd_idinfo;
extern const struct blkid_idinfo befs_idinfo;
+extern const struct blkid_idinfo nilfs2_idinfo;
/*
* superblock functions
--
1.5.6.5
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