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authorSven-Göran Bergh <sgb@systemasis.org>2013-08-01 09:05:08 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2013-08-01 09:05:08 (GMT)
commit93696341672cb8e086a55ecdef4c5617675c1da2 (patch)
tree7e45ec70cc476d56fbc100ddf5d48920bc0344a6
parenta060a1ad9655dede51f842873672652bf78a3e8e (diff)
downloadbusybox-93696341672cb8e086a55ecdef4c5617675c1da2.tar.gz
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volume_id: add f2fs detection
function old new delta volume_id_probe_f2fs - 98 +98 Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--util-linux/volume_id/f2fs.c95
-rw-r--r--util-linux/volume_id/volume_id.c3
-rw-r--r--util-linux/volume_id/volume_id_internal.h2
3 files changed, 100 insertions, 0 deletions
diff --git a/util-linux/volume_id/f2fs.c b/util-linux/volume_id/f2fs.c
new file mode 100644
index 0000000..bf0b662
--- /dev/null
+++ b/util-linux/volume_id/f2fs.c
@@ -0,0 +1,95 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2012 S-G Bergh <sgb@systemasis.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_F2FS) += f2fs.o
+
+//config:
+//config:config FEATURE_VOLUMEID_F2FS
+//config: bool "f2fs filesystem"
+//config: default y
+//config: depends on VOLUMEID
+//config: help
+//config: F2FS (aka Flash-Friendly File System) is a log-structured file system,
+//config: which is adapted to newer forms of storage. F2FS also remedies some
+//config: known issues of the older log structured file systems, such as high
+//config: cleaning overhead.
+//config:
+
+#include "volume_id_internal.h"
+
+#define F2FS_MAGIC 0xF2F52010 // F2FS Magic Number
+#define F2FS_UUID_SIZE 16
+#define F2FS_LABEL_SIZE 512
+#define F2FS_LABEL_BYTES 1024
+#define F2FS_SB1_OFFSET 0x400 // offset for 1:st super block
+/*
+#define F2FS_SB2_OFFSET 0x1400 // offset for 2:nd super block
+*/
+
+struct f2fs_super_block { // According to version 1.1
+/* 0x00 */ uint32_t magic; // Magic Number
+/* 0x04 */ uint16_t major_ver; // Major Version
+/* 0x06 */ uint16_t minor_ver; // Minor Version
+/* 0x08 */ uint32_t log_sectorsize; // log2 sector size in bytes
+/* 0x0C */ uint32_t log_sectors_per_block; // log2 # of sectors per block
+/* 0x10 */ uint32_t log_blocksize; // log2 block size in bytes
+/* 0x14 */ uint32_t log_blocks_per_seg; // log2 # of blocks per segment
+/* 0x18 */ uint32_t segs_per_sec; // # of segments per section
+/* 0x1C */ uint32_t secs_per_zone; // # of sections per zone
+/* 0x20 */ uint32_t checksum_offset; // checksum offset inside super block
+/* 0x24 */ uint64_t block_count; // total # of user blocks
+/* 0x2C */ uint32_t section_count; // total # of sections
+/* 0x30 */ uint32_t segment_count; // total # of segments
+/* 0x34 */ uint32_t segment_count_ckpt; // # of segments for checkpoint
+/* 0x38 */ uint32_t segment_count_sit; // # of segments for SIT
+/* 0x3C */ uint32_t segment_count_nat; // # of segments for NAT
+/* 0x40 */ uint32_t segment_count_ssa; // # of segments for SSA
+/* 0x44 */ uint32_t segment_count_main; // # of segments for main area
+/* 0x48 */ uint32_t segment0_blkaddr; // start block address of segment 0
+/* 0x4C */ uint32_t cp_blkaddr; // start block address of checkpoint
+/* 0x50 */ uint32_t sit_blkaddr; // start block address of SIT
+/* 0x54 */ uint32_t nat_blkaddr; // start block address of NAT
+/* 0x58 */ uint32_t ssa_blkaddr; // start block address of SSA
+/* 0x5C */ uint32_t main_blkaddr; // start block address of main area
+/* 0x60 */ uint32_t root_ino; // root inode number
+/* 0x64 */ uint32_t node_ino; // node inode number
+/* 0x68 */ uint32_t meta_ino; // meta inode number
+/* 0x6C */ uint8_t uuid[F2FS_UUID_SIZE]; // 128-bit uuid for volume
+/* 0x7C */ uint16_t volume_name[F2FS_LABEL_SIZE]; // volume name
+// /* 0x47C */ uint32_t extension_count; // # of extensions below
+// /* 0x480 */ uint8_t extension_list[64][8]; // extension array
+} PACKED;
+
+
+int FAST_FUNC volume_id_probe_f2fs(struct volume_id *id /*,uint64_t off*/)
+{
+ struct f2fs_super_block *sb;
+
+ // Go for primary super block (ignore second sb)
+ dbg("f2fs: probing at offset 0x%x", F2FS_SB1_OFFSET);
+ sb = volume_id_get_buffer(id, F2FS_SB1_OFFSET, sizeof(*sb));
+
+ if (!sb)
+ return -1;
+
+ if (sb->magic != cpu_to_le32(F2FS_MAGIC))
+ return -1;
+
+ IF_FEATURE_BLKID_TYPE(id->type = "f2fs");
+
+ // For version 1.0 we don't know sb structure and can't set label/uuid
+ if (sb->major_ver == cpu_to_le16(1) && sb->minor_ver == cpu_to_le16(0))
+ return 0;
+
+ volume_id_set_label_unicode16(id, (uint8_t *)sb->volume_name,
+ LE, MIN(F2FS_LABEL_BYTES, VOLUME_ID_LABEL_SIZE));
+
+ volume_id_set_uuid(id, sb->uuid, UUID_DCE);
+
+ return 0;
+}
diff --git a/util-linux/volume_id/volume_id.c b/util-linux/volume_id/volume_id.c
index 097a6f1..5c459a0 100644
--- a/util-linux/volume_id/volume_id.c
+++ b/util-linux/volume_id/volume_id.c
@@ -138,6 +138,9 @@ static const probe_fptr fs2[] = {
#if ENABLE_FEATURE_VOLUMEID_UFS
volume_id_probe_ufs,
#endif
+#if ENABLE_FEATURE_VOLUMEID_F2FS
+ volume_id_probe_f2fs,
+#endif
#if ENABLE_FEATURE_VOLUMEID_NILFS
volume_id_probe_nilfs,
#endif
diff --git a/util-linux/volume_id/volume_id_internal.h b/util-linux/volume_id/volume_id_internal.h
index d3c6a61..6e2dbd7 100644
--- a/util-linux/volume_id/volume_id_internal.h
+++ b/util-linux/volume_id/volume_id_internal.h
@@ -195,6 +195,8 @@ int FAST_FUNC volume_id_probe_luks(struct volume_id *id /*,uint64_t off*/);
//int FAST_FUNC volume_id_probe_msdos_part_table(struct volume_id *id /*,uint64_t off*/);
+int FAST_FUNC volume_id_probe_f2fs(struct volume_id *id /*,uint64_t off*/);
+
int FAST_FUNC volume_id_probe_nilfs(struct volume_id *id /*,uint64_t off*/);
int FAST_FUNC volume_id_probe_ntfs(struct volume_id *id /*,uint64_t off*/);