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authorbigbiff bigbiff <bigbiff@teamw.in>2013-02-23 02:55:50 +0100
committerbigbiff bigbiff <bigbiff@teamw.in>2013-02-25 15:06:46 +0100
commite60683a0d553b6488c564863f4e48954944fb0f8 (patch)
tree9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/f2fs.c
parentFix building of updater for 4.2 environment (diff)
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Diffstat (limited to '')
-rw-r--r--libblkid/f2fs.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/libblkid/f2fs.c b/libblkid/f2fs.c
new file mode 100644
index 000000000..1543a7a8b
--- /dev/null
+++ b/libblkid/f2fs.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2013 Alejandro Martinez Ruiz <alex@nowcomputing.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License
+ */
+
+#include <stddef.h>
+#include <string.h>
+
+#include "superblocks.h"
+
+#define F2FS_MAGIC "\x10\x20\xF5\xF2"
+#define F2FS_MAGIC_OFF 0
+#define F2FS_UUID_SIZE 16
+#define F2FS_LABEL_SIZE 512
+#define F2FS_SB1_OFF 0x400
+#define F2FS_SB1_KBOFF (F2FS_SB1_OFF >> 10)
+#define F2FS_SB2_OFF 0x1400
+#define F2FS_SB2_KBOFF (F2FS_SB2_OFF >> 10)
+
+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 */
+#if 0
+/* 0x47C */ uint32_t extension_count; /* # of extensions below */
+/* 0x480 */ uint8_t extension_list[64][8]; /* extension array */
+#endif
+} __attribute__((packed));
+
+static int probe_f2fs(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ struct f2fs_super_block *sb;
+ uint16_t major, minor;
+
+ sb = blkid_probe_get_sb(pr, mag, struct f2fs_super_block);
+ if (!sb)
+ return -1;
+
+ major = le16_to_cpu(sb->major_ver);
+ minor = le16_to_cpu(sb->minor_ver);
+
+ /* For version 1.0 we cannot know the correct sb structure */
+ if (major == 1 && minor == 0)
+ return 0;
+
+ if (*((unsigned char *) sb->volume_name))
+ blkid_probe_set_utf8label(pr, (unsigned char *) sb->volume_name,
+ sizeof(sb->volume_name),
+ BLKID_ENC_UTF16LE);
+
+ blkid_probe_set_uuid(pr, sb->uuid);
+ blkid_probe_sprintf_version(pr, "%u.%u", major, minor);
+ return 0;
+}
+
+const struct blkid_idinfo f2fs_idinfo =
+{
+ .name = "f2fs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_f2fs,
+ .magics =
+ {
+ {
+ .magic = F2FS_MAGIC,
+ .len = 4,
+ .kboff = F2FS_SB1_KBOFF,
+ .sboff = F2FS_MAGIC_OFF
+ },
+ { NULL }
+ }
+};