diff options
Diffstat (limited to 'libblkid/f2fs.c')
| -rw-r--r-- | libblkid/f2fs.c | 99 |
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 } + } +}; |