f560422fa0
Redundant help texts (one which only repeats the description) are deleted. Descriptions and help texts are trimmed. Some config options are moved, even across menus. No config option _names_ are changed. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
94 lines
3.6 KiB
C
94 lines
3.6 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2012 S-G Bergh <sgb@systemasis.org>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_F2FS) += f2fs.o
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//config:config FEATURE_VOLUMEID_F2FS
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//config: bool "f2fs filesystem"
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//config: default y
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//config: depends on VOLUMEID
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//config: help
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//config: F2FS (aka Flash-Friendly File System) is a log-structured file system,
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//config: which is adapted to newer forms of storage. F2FS also remedies some
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//config: known issues of the older log structured file systems, such as high
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//config: cleaning overhead.
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#include "volume_id_internal.h"
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#define F2FS_MAGIC 0xF2F52010 // F2FS Magic Number
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#define F2FS_UUID_SIZE 16
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#define F2FS_LABEL_SIZE 512
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#define F2FS_LABEL_BYTES 1024
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#define F2FS_SB1_OFFSET 0x400 // offset for 1:st super block
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/*
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#define F2FS_SB2_OFFSET 0x1400 // offset for 2:nd super block
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*/
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struct f2fs_super_block { // According to version 1.1
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/* 0x00 */ uint32_t magic; // Magic Number
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/* 0x04 */ uint16_t major_ver; // Major Version
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/* 0x06 */ uint16_t minor_ver; // Minor Version
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/* 0x08 */ uint32_t log_sectorsize; // log2 sector size in bytes
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/* 0x0C */ uint32_t log_sectors_per_block; // log2 # of sectors per block
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/* 0x10 */ uint32_t log_blocksize; // log2 block size in bytes
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/* 0x14 */ uint32_t log_blocks_per_seg; // log2 # of blocks per segment
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/* 0x18 */ uint32_t segs_per_sec; // # of segments per section
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/* 0x1C */ uint32_t secs_per_zone; // # of sections per zone
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/* 0x20 */ uint32_t checksum_offset; // checksum offset inside super block
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/* 0x24 */ uint64_t block_count; // total # of user blocks
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/* 0x2C */ uint32_t section_count; // total # of sections
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/* 0x30 */ uint32_t segment_count; // total # of segments
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/* 0x34 */ uint32_t segment_count_ckpt; // # of segments for checkpoint
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/* 0x38 */ uint32_t segment_count_sit; // # of segments for SIT
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/* 0x3C */ uint32_t segment_count_nat; // # of segments for NAT
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/* 0x40 */ uint32_t segment_count_ssa; // # of segments for SSA
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/* 0x44 */ uint32_t segment_count_main; // # of segments for main area
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/* 0x48 */ uint32_t segment0_blkaddr; // start block address of segment 0
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/* 0x4C */ uint32_t cp_blkaddr; // start block address of checkpoint
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/* 0x50 */ uint32_t sit_blkaddr; // start block address of SIT
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/* 0x54 */ uint32_t nat_blkaddr; // start block address of NAT
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/* 0x58 */ uint32_t ssa_blkaddr; // start block address of SSA
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/* 0x5C */ uint32_t main_blkaddr; // start block address of main area
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/* 0x60 */ uint32_t root_ino; // root inode number
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/* 0x64 */ uint32_t node_ino; // node inode number
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/* 0x68 */ uint32_t meta_ino; // meta inode number
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/* 0x6C */ uint8_t uuid[F2FS_UUID_SIZE]; // 128-bit uuid for volume
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/* 0x7C */ uint16_t volume_name[F2FS_LABEL_SIZE]; // volume name
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// /* 0x47C */ uint32_t extension_count; // # of extensions below
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// /* 0x480 */ uint8_t extension_list[64][8]; // extension array
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} PACKED;
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int FAST_FUNC volume_id_probe_f2fs(struct volume_id *id /*,uint64_t off*/)
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{
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struct f2fs_super_block *sb;
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// Go for primary super block (ignore second sb)
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dbg("f2fs: probing at offset 0x%x", F2FS_SB1_OFFSET);
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sb = volume_id_get_buffer(id, F2FS_SB1_OFFSET, sizeof(*sb));
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if (!sb)
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return -1;
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if (sb->magic != cpu_to_le32(F2FS_MAGIC))
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return -1;
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IF_FEATURE_BLKID_TYPE(id->type = "f2fs");
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// For version 1.0 we don't know sb structure and can't set label/uuid
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if (sb->major_ver == cpu_to_le16(1) && sb->minor_ver == cpu_to_le16(0))
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return 0;
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volume_id_set_label_unicode16(id, (uint8_t *)sb->volume_name,
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LE, MIN(F2FS_LABEL_BYTES, VOLUME_ID_LABEL_SIZE));
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volume_id_set_uuid(id, sb->uuid, UUID_DCE);
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return 0;
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}
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