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[2.02] Re: [f2fs-dev] [PATCH v7] F2FS support
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From: |
Andrei Borzenkov |
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Subject: |
[2.02] Re: [f2fs-dev] [PATCH v7] F2FS support |
|
Date: |
Tue, 1 Mar 2016 22:52:09 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 |
ACK from my side. It is leaf code that does not affect anything so
should not cause any regression.
22.02.2016 21:25, Jaegeuk Kim пишет:
> Chang log from v6:
> o remove redundant filesize check in ->read
> o check consistency in ->open regarding to inline_data
>
> -- >8 --
> From 51c120612fdbc4bc315e9c4c6e91ca888c3f3596 Mon Sep 17 00:00:00 2001
> From: Jaegeuk Kim <address@hidden>
> Date: Tue, 17 Nov 2015 12:45:13 -0800
> Subject: [PATCH] F2FS support
>
> "F2FS (Flash-Friendly File System) is flash-friendly file system which was
> merged
> into Linux kernel v3.8 in 2013.
>
> The motive for F2FS was to build a file system that from the start, takes into
> account the characteristics of NAND flash memory-based storage devices (such
> as
> solid-state disks, eMMC, and SD cards).
>
> F2FS was designed on a basis of a log-structured file system approach, which
> remedies some known issues of the older log structured file systems, such as
> the snowball effect of wandering trees and high cleaning overhead. In
> addition,
> since a NAND-based storage device shows different characteristics according to
> its internal geometry or flash memory management scheme (such as the Flash
> Translation Layer or FTL), it supports various parameters not only for
> configuring on-disk layout, but also for selecting allocation and cleaning
> algorithm.", quote by https://en.wikipedia.org/wiki/F2FS.
>
> The source codes for F2FS are available from:
>
> http://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git
> http://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs-tools.git
>
> Signed-off-by: Jaegeuk Kim <address@hidden>
> ---
> Makefile.util.def | 7 +
> docs/grub.texi | 5 +-
> grub-core/Makefile.core.def | 5 +
> grub-core/fs/f2fs.c | 1289
> ++++++++++++++++++++++++++++++++++++++++++
> po/exclude.pot | 1 +
> tests/f2fs_test.in | 19 +
> tests/util/grub-fs-tester.in | 10 +-
> 7 files changed, 1332 insertions(+), 4 deletions(-)
> create mode 100644 grub-core/fs/f2fs.c
> create mode 100644 tests/f2fs_test.in
>
> diff --git a/Makefile.util.def b/Makefile.util.def
> index db7e8ec..84627bb 100644
> --- a/Makefile.util.def
> +++ b/Makefile.util.def
> @@ -99,6 +99,7 @@ library = {
> common = grub-core/fs/ext2.c;
> common = grub-core/fs/fat.c;
> common = grub-core/fs/exfat.c;
> + common = grub-core/fs/f2fs.c;
> common = grub-core/fs/fshelp.c;
> common = grub-core/fs/hfs.c;
> common = grub-core/fs/hfsplus.c;
> @@ -766,6 +767,12 @@ script = {
>
> script = {
> testcase;
> + name = f2fs_test;
> + common = tests/f2fs_test.in;
> +};
> +
> +script = {
> + testcase;
> name = nilfs2_test;
> common = tests/nilfs2_test.in;
> };
> diff --git a/docs/grub.texi b/docs/grub.texi
> index 1df3db2..e5a80f3 100644
> --- a/docs/grub.texi
> +++ b/docs/grub.texi
> @@ -360,7 +360,8 @@ blocklist notation. The currently supported filesystem
> types are @dfn{Amiga
> Fast FileSystem (AFFS)}, @dfn{AtheOS fs}, @dfn{BeFS},
> @dfn{BtrFS} (including raid0, raid1, raid10, gzip and lzo),
> @dfn{cpio} (little- and big-endian bin, odc and newc variants),
> address@hidden ext2/ext3/ext4}, @dfn{DOS FAT12/FAT16/FAT32}, @dfn{exFAT},
> @dfn{HFS},
> address@hidden ext2/ext3/ext4}, @dfn{DOS FAT12/FAT16/FAT32}, @dfn{exFAT},
> address@hidden, @dfn{HFS},
> @dfn{HFS+}, @dfn{ISO9660} (including Joliet, Rock-ridge and multi-chunk
> files),
> @dfn{JFS}, @dfn{Minix fs} (versions 1, 2 and 3), @dfn{nilfs2},
> @dfn{NTFS} (including compression), @dfn{ReiserFS}, @dfn{ROMFS},
> @@ -5347,7 +5348,7 @@ NTFS, JFS, UDF, HFS+, exFAT, long filenames in FAT,
> Joliet part of
> ISO9660 are treated as UTF-16 as per specification. AFS and BFS are read
> as UTF-8, again according to specification. BtrFS, cpio, tar, squash4, minix,
> minix2, minix3, ROMFS, ReiserFS, XFS, ext2, ext3, ext4, FAT (short names),
> -RockRidge part of ISO9660, nilfs2, UFS1, UFS2 and ZFS are assumed
> +f2fs, RockRidge part of ISO9660, nilfs2, UFS1, UFS2 and ZFS are assumed
> to be UTF-8. This might be false on systems configured with legacy charset
> but as long as the charset used is superset of ASCII you should be able to
> access ASCII-named files. And it's recommended to configure your system to
> use
> diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
> index d9fa0e3..b585ade 100644
> --- a/grub-core/Makefile.core.def
> +++ b/grub-core/Makefile.core.def
> @@ -1278,6 +1278,11 @@ module = {
> };
>
> module = {
> + name = f2fs;
> + common = fs/f2fs.c;
> +};
> +
> +module = {
> name = fshelp;
> common = fs/fshelp.c;
> };
> diff --git a/grub-core/fs/f2fs.c b/grub-core/fs/f2fs.c
> new file mode 100644
> index 0000000..cb312b3
> --- /dev/null
> +++ b/grub-core/fs/f2fs.c
> @@ -0,0 +1,1289 @@
> +/*
> + * f2fs.c - Flash-Friendly File System
> + *
> + * Written by Jaegeuk Kim <address@hidden>
> + *
> + * Copyright (C) 2015 Free Software Foundation, Inc.
> + *
> + * GRUB is free software: you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation, either version 3 of the License, or
> + * (at your option) any later version.
> + *
> + * GRUB is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
> + */
> +#include <grub/err.h>
> +#include <grub/file.h>
> +#include <grub/mm.h>
> +#include <grub/misc.h>
> +#include <grub/disk.h>
> +#include <grub/dl.h>
> +#include <grub/types.h>
> +#include <grub/charset.h>
> +#include <grub/fshelp.h>
> +
> +GRUB_MOD_LICENSE ("GPLv3+");
> +
> +/* F2FS Magic Number */
> +#define F2FS_SUPER_MAGIC 0xF2F52010
> +#define CHECKSUM_OFFSET 4092 /* must be aligned 4
> bytes */
> +#define U32_CHECKSUM_OFFSET (CHECKSUM_OFFSET >> 2)
> +
> +/* byte-size offset */
> +#define F2FS_SUPER_OFFSET ((grub_disk_addr_t)1024)
> +#define F2FS_SUPER_OFFSET0 (F2FS_SUPER_OFFSET >> GRUB_DISK_SECTOR_BITS)
> +#define F2FS_SUPER_OFFSET1 ((F2FS_SUPER_OFFSET + F2FS_BLKSIZE) >> \
> + GRUB_DISK_SECTOR_BITS)
> +
> +/* 9 bits for 512 bytes */
> +#define F2FS_MIN_LOG_SECTOR_SIZE 9
> +
> +/* support only 4KB block */
> +#define F2FS_BLK_BITS 12
> +#define F2FS_BLKSIZE (1 << F2FS_BLK_BITS)
> +#define F2FS_BLK_SEC_BITS (F2FS_BLK_BITS - GRUB_DISK_SECTOR_BITS)
> +
> +#define VERSION_LEN 256
> +#define F2FS_MAX_EXTENSION 64
> +
> +#define CP_COMPACT_SUM_FLAG 0x00000004
> +#define CP_UMOUNT_FLAG 0x00000001
> +
> +#define MAX_ACTIVE_LOGS 16
> +#define MAX_ACTIVE_NODE_LOGS 8
> +#define MAX_ACTIVE_DATA_LOGS 8
> +#define NR_CURSEG_DATA_TYPE 3
> +#define NR_CURSEG_NODE_TYPE 3
> +#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
> +
> +#define ENTRIES_IN_SUM 512
> +#define SUMMARY_SIZE 7
> +#define SUM_FOOTER_SIZE 5
> +#define JENTRY_SIZE (sizeof(struct grub_f2fs_nat_jent))
> +#define SUM_ENTRIES_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM)
> +#define SUM_JOURNAL_SIZE (F2FS_BLKSIZE - SUM_FOOTER_SIZE -\
> + SUM_ENTRIES_SIZE)
> +#define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) / JENTRY_SIZE)
> +#define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) % JENTRY_SIZE)
> +
> +#define NAT_ENTRY_SIZE (sizeof(struct grub_f2fs_nat_entry))
> +#define NAT_ENTRY_PER_BLOCK (F2FS_BLKSIZE / NAT_ENTRY_SIZE)
> +
> +#define F2FS_NAME_LEN 255
> +#define F2FS_SLOT_LEN 8
> +#define NR_DENTRY_IN_BLOCK 214
> +#define SIZE_OF_DIR_ENTRY 11 /* by byte */
> +#define BITS_PER_BYTE 8
> +#define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE -
> 1) / \
> + BITS_PER_BYTE)
> +#define SIZE_OF_RESERVED (F2FS_BLKSIZE - ((SIZE_OF_DIR_ENTRY + \
> + F2FS_SLOT_LEN) * \
> + NR_DENTRY_IN_BLOCK + SIZE_OF_DENTRY_BITMAP))
> +
> +#define F2FS_INLINE_XATTR_ADDRS 50 /* 200 bytes for inline xattrs
> */
> +#define DEF_ADDRS_PER_INODE 923 /* Address Pointers in an Inode */
> +
> +#define ADDRS_PER_BLOCK 1018 /* Address Pointers in a Direct Block */
> +#define NIDS_PER_BLOCK 1018 /* Node IDs in an Indirect Block */
> +#define NODE_DIR1_BLOCK (DEF_ADDRS_PER_INODE + 1)
> +#define NODE_DIR2_BLOCK (DEF_ADDRS_PER_INODE + 2)
> +#define NODE_IND1_BLOCK (DEF_ADDRS_PER_INODE + 3)
> +#define NODE_IND2_BLOCK (DEF_ADDRS_PER_INODE + 4)
> +#define NODE_DIND_BLOCK (DEF_ADDRS_PER_INODE + 5)
> +
> +#define MAX_INLINE_DATA (4 * (DEF_ADDRS_PER_INODE - \
> + F2FS_INLINE_XATTR_ADDRS - 1))
> +#define NR_INLINE_DENTRY (MAX_INLINE_DATA * BITS_PER_BYTE / \
> + ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
> + BITS_PER_BYTE + 1))
> +#define INLINE_DENTRY_BITMAP_SIZE ((NR_INLINE_DENTRY + \
> + BITS_PER_BYTE - 1) / BITS_PER_BYTE)
> +#define INLINE_RESERVED_SIZE (MAX_INLINE_DATA - \
> + ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
> + NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE))
> +#define CURSEG_HOT_DATA 0
> +
> +#define CKPT_FLAG_SET(ckpt, f) \
> + (ckpt)->ckpt_flags & grub_cpu_to_le32_compile_time (f)
> +
> +#define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */
> +#define F2FS_INLINE_DATA 0x02 /* file inline data flag */
> +#define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */
> +#define F2FS_DATA_EXIST 0x08 /* file inline data exist flag
> */
> +#define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */
> +
> +enum FILE_TYPE
> +{
> + F2FS_FT_UNKNOWN,
> + F2FS_FT_REG_FILE = 1,
> + F2FS_FT_DIR = 2,
> + F2FS_FT_SYMLINK = 7,
> +};
> +
> +#define MAX_VOLUME_NAME 512
> +
> +struct grub_f2fs_superblock
> +{
> + grub_uint32_t magic;
> + grub_uint16_t dummy1[2];
> + grub_uint32_t log_sectorsize;
> + grub_uint32_t log_sectors_per_block;
> + grub_uint32_t log_blocksize;
> + grub_uint32_t log_blocks_per_seg;
> + grub_uint32_t segs_per_sec;
> + grub_uint32_t secs_per_zone;
> + grub_uint32_t checksum_offset;
> + grub_uint8_t dummy2[40];
> + grub_uint32_t cp_blkaddr;
> + grub_uint32_t sit_blkaddr;
> + grub_uint32_t nat_blkaddr;
> + grub_uint32_t ssa_blkaddr;
> + grub_uint32_t main_blkaddr;
> + grub_uint32_t root_ino;
> + grub_uint32_t node_ino;
> + grub_uint32_t meta_ino;
> + grub_uint8_t uuid[16];
> + grub_uint16_t volume_name[MAX_VOLUME_NAME];
> + grub_uint32_t extension_count;
> + grub_uint8_t extension_list[F2FS_MAX_EXTENSION][8];
> + grub_uint32_t cp_payload;
> + grub_uint8_t version[VERSION_LEN];
> + grub_uint8_t init_version[VERSION_LEN];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_checkpoint
> +{
> + grub_uint64_t checkpoint_ver;
> + grub_uint64_t user_block_count;
> + grub_uint64_t valid_block_count;
> + grub_uint32_t rsvd_segment_count;
> + grub_uint32_t overprov_segment_count;
> + grub_uint32_t free_segment_count;
> + grub_uint32_t cur_node_segno[MAX_ACTIVE_NODE_LOGS];
> + grub_uint16_t cur_node_blkoff[MAX_ACTIVE_NODE_LOGS];
> + grub_uint32_t cur_data_segno[MAX_ACTIVE_DATA_LOGS];
> + grub_uint16_t cur_data_blkoff[MAX_ACTIVE_DATA_LOGS];
> + grub_uint32_t ckpt_flags;
> + grub_uint32_t cp_pack_total_block_count;
> + grub_uint32_t cp_pack_start_sum;
> + grub_uint32_t valid_node_count;
> + grub_uint32_t valid_inode_count;
> + grub_uint32_t next_free_nid;
> + grub_uint32_t sit_ver_bitmap_bytesize;
> + grub_uint32_t nat_ver_bitmap_bytesize;
> + grub_uint32_t checksum_offset;
> + grub_uint64_t elapsed_time;
> + grub_uint8_t alloc_type[MAX_ACTIVE_LOGS];
> + grub_uint8_t sit_nat_version_bitmap[3900];
> + grub_uint32_t checksum;
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_nat_entry {
> + grub_uint8_t version;
> + grub_uint32_t ino;
> + grub_uint32_t block_addr;
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_nat_jent
> +{
> + grub_uint32_t nid;
> + struct grub_f2fs_nat_entry ne;
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_nat_journal {
> + grub_uint16_t n_nats;
> + struct grub_f2fs_nat_jent entries[NAT_JOURNAL_ENTRIES];
> + grub_uint8_t reserved[NAT_JOURNAL_RESERVED];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_nat_block {
> + struct grub_f2fs_nat_entry ne[NAT_ENTRY_PER_BLOCK];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_dir_entry
> +{
> + grub_uint32_t hash_code;
> + grub_uint32_t ino;
> + grub_uint16_t name_len;
> + grub_uint8_t file_type;
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_inline_dentry
> +{
> + grub_uint8_t dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE];
> + grub_uint8_t reserved[INLINE_RESERVED_SIZE];
> + struct grub_f2fs_dir_entry dentry[NR_INLINE_DENTRY];
> + grub_uint8_t filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_dentry_block {
> + grub_uint8_t dentry_bitmap[SIZE_OF_DENTRY_BITMAP];
> + grub_uint8_t reserved[SIZE_OF_RESERVED];
> + struct grub_f2fs_dir_entry dentry[NR_DENTRY_IN_BLOCK];
> + grub_uint8_t filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_inode
> +{
> + grub_uint16_t i_mode;
> + grub_uint8_t i_advise;
> + grub_uint8_t i_inline;
> + grub_uint32_t i_uid;
> + grub_uint32_t i_gid;
> + grub_uint32_t i_links;
> + grub_uint64_t i_size;
> + grub_uint64_t i_blocks;
> + grub_uint64_t i_atime;
> + grub_uint64_t i_ctime;
> + grub_uint64_t i_mtime;
> + grub_uint32_t i_atime_nsec;
> + grub_uint32_t i_ctime_nsec;
> + grub_uint32_t i_mtime_nsec;
> + grub_uint32_t i_generation;
> + grub_uint32_t i_current_depth;
> + grub_uint32_t i_xattr_nid;
> + grub_uint32_t i_flags;
> + grub_uint32_t i_pino;
> + grub_uint32_t i_namelen;
> + grub_uint8_t i_name[F2FS_NAME_LEN];
> + grub_uint8_t i_dir_level;
> + grub_uint8_t i_ext[12];
> + grub_uint32_t i_addr[DEF_ADDRS_PER_INODE];
> + grub_uint32_t i_nid[5];
> +} GRUB_PACKED;
> +
> +struct grub_direct_node {
> + grub_uint32_t addr[ADDRS_PER_BLOCK];
> +} GRUB_PACKED;
> +
> +struct grub_indirect_node {
> + grub_uint32_t nid[NIDS_PER_BLOCK];
> +} GRUB_PACKED;
> +
> +struct grub_f2fs_node
> +{
> + union
> + {
> + struct grub_f2fs_inode i;
> + struct grub_direct_node dn;
> + struct grub_indirect_node in;
> + char buf[F2FS_BLKSIZE - 40]; /* Should occupy F2FS_BLKSIZE totally */
> + };
> + grub_uint8_t dummy[40];
> +} GRUB_PACKED;
> +
> +struct grub_fshelp_node
> +{
> + struct grub_f2fs_data *data;
> + struct grub_f2fs_node inode;
> + grub_uint32_t ino;
> + int inode_read;
> +};
> +
> +struct grub_f2fs_data
> +{
> + struct grub_f2fs_superblock sblock;
> + struct grub_f2fs_checkpoint ckpt;
> +
> + grub_uint32_t root_ino;
> + grub_uint32_t blocks_per_seg;
> + grub_uint32_t cp_blkaddr;
> + grub_uint32_t nat_blkaddr;
> +
> + struct grub_f2fs_nat_journal nat_j;
> + char *nat_bitmap;
> +
> + grub_disk_t disk;
> + struct grub_f2fs_node *inode;
> + struct grub_fshelp_node diropen;
> +};
> +
> +struct grub_f2fs_dir_iter_ctx
> +{
> + struct grub_f2fs_data *data;
> + grub_fshelp_iterate_dir_hook_t hook;
> + void *hook_data;
> + grub_uint8_t *bitmap;
> + grub_uint8_t (*filename)[F2FS_SLOT_LEN];
> + struct grub_f2fs_dir_entry *dentry;
> + int max;
> +};
> +
> +struct grub_f2fs_dir_ctx
> +{
> + grub_fs_dir_hook_t hook;
> + void *hook_data;
> + struct grub_f2fs_data *data;
> +};
> +
> +static grub_dl_t my_mod;
> +
> +static inline int
> +grub_f2fs_test_bit_le (int nr, const grub_uint8_t *addr)
> +{
> + return addr[nr >> 3] & (1 << (nr & 7));
> +}
> +
> +static inline char *
> +__inline_addr (struct grub_f2fs_inode *inode)
> +{
> + return (char *)&inode->i_addr[1];
> +}
> +
> +static inline grub_uint64_t
> +grub_f2fs_file_size (struct grub_f2fs_inode *inode)
> +{
> + return grub_le_to_cpu64 (inode->i_size);
> +}
> +
> +static inline grub_uint32_t
> +__start_cp_addr (struct grub_f2fs_data *data)
> +{
> + struct grub_f2fs_checkpoint *ckpt = &data->ckpt;
> + grub_uint32_t start_addr = data->cp_blkaddr;
> +
> + if (!(ckpt->checkpoint_ver & grub_cpu_to_le64_compile_time(1)))
> + return start_addr + data->blocks_per_seg;
> + return start_addr;
> +}
> +
> +static inline grub_uint32_t
> +__start_sum_block (struct grub_f2fs_data *data)
> +{
> + struct grub_f2fs_checkpoint *ckpt = &data->ckpt;
> +
> + return __start_cp_addr (data) + grub_le_to_cpu32 (ckpt->cp_pack_start_sum);
> +}
> +
> +static inline grub_uint32_t
> +__sum_blk_addr (struct grub_f2fs_data *data, int base, int type)
> +{
> + struct grub_f2fs_checkpoint *ckpt = &data->ckpt;
> +
> + return __start_cp_addr (data) +
> + grub_le_to_cpu32 (ckpt->cp_pack_total_block_count)
> + - (base + 1) + type;
> +}
> +
> +static inline void *
> +__nat_bitmap_ptr (struct grub_f2fs_data *data)
> +{
> + struct grub_f2fs_checkpoint *ckpt = &data->ckpt;
> + grub_uint32_t offset;
> +
> + if (grub_le_to_cpu32 (data->sblock.cp_payload) > 0)
> + return ckpt->sit_nat_version_bitmap;
> +
> + offset = grub_le_to_cpu32 (ckpt->sit_ver_bitmap_bytesize);
> + return ckpt->sit_nat_version_bitmap + offset;
> +}
> +
> +static inline grub_uint32_t
> +__get_node_id (struct grub_f2fs_node *rn, int off, int inode_block)
> +{
> + if (inode_block)
> + return grub_le_to_cpu32 (rn->i.i_nid[off - NODE_DIR1_BLOCK]);
> + return grub_le_to_cpu32 (rn->in.nid[off]);
> +}
> +
> +static inline grub_err_t
> +grub_f2fs_block_read (struct grub_f2fs_data *data, grub_uint32_t blkaddr,
> void *buf)
> +{
> + return grub_disk_read (data->disk,
> + ((grub_disk_addr_t)blkaddr) << F2FS_BLK_SEC_BITS,
> + 0, F2FS_BLKSIZE, buf);
> +}
> +
> +/*
> + * CRC32
> +*/
> +#define CRCPOLY_LE 0xedb88320
> +
> +static inline grub_uint32_t
> +grub_f2fs_cal_crc32 (const void *buf, const grub_uint32_t len)
> +{
> + grub_uint32_t crc = F2FS_SUPER_MAGIC;
> + unsigned char *p = (unsigned char *)buf;
> + grub_uint32_t tmp = len;
> + int i;
> +
> + while (tmp--)
> + {
> + crc ^= *p++;
> + for (i = 0; i < 8; i++)
> + crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
> + }
> + return crc;
> +}
> +
> +static inline int
> +grub_f2fs_crc_valid (grub_uint32_t blk_crc, void *buf, const grub_uint32_t
> len)
> +{
> + grub_uint32_t cal_crc = 0;
> +
> + cal_crc = grub_f2fs_cal_crc32 (buf, len);
> +
> + return (cal_crc == blk_crc) ? 1 : 0;
> +}
> +
> +static inline int
> +grub_f2fs_test_bit (grub_uint32_t nr, const char *p)
> +{
> + int mask;
> +
> + p += (nr >> 3);
> + mask = 1 << (7 - (nr & 0x07));
> + return mask & *p;
> +}
> +
> +static int
> +grub_f2fs_sanity_check_sb (struct grub_f2fs_superblock *sb)
> +{
> + grub_uint32_t log_sectorsize, log_sectors_per_block;
> +
> + if (sb->magic != grub_cpu_to_le32_compile_time (F2FS_SUPER_MAGIC))
> + return -1;
> +
> + if (sb->log_blocksize != grub_cpu_to_le32_compile_time (F2FS_BLK_BITS))
> + return -1;
> +
> + log_sectorsize = grub_le_to_cpu32 (sb->log_sectorsize);
> + log_sectors_per_block = grub_le_to_cpu32 (sb->log_sectors_per_block);
> +
> + if (log_sectorsize > F2FS_BLK_BITS)
> + return -1;
> +
> + if (log_sectorsize < F2FS_MIN_LOG_SECTOR_SIZE)
> + return -1;
> +
> + if (log_sectors_per_block + log_sectorsize != F2FS_BLK_BITS)
> + return -1;
> +
> + return 0;
> +}
> +
> +static int
> +grub_f2fs_read_sb (struct grub_f2fs_data *data, grub_disk_addr_t offset)
> +{
> + grub_disk_t disk = data->disk;
> + grub_err_t err;
> +
> + /* Read first super block. */
> + err = grub_disk_read (disk, offset, 0, sizeof (data->sblock),
> &data->sblock);
> + if (err)
> + return -1;
> +
> + return grub_f2fs_sanity_check_sb (&data->sblock);
> +}
> +
> +static void *
> +validate_checkpoint (struct grub_f2fs_data *data, grub_uint32_t cp_addr,
> + grub_uint64_t *version)
> +{
> + grub_uint32_t *cp_page_1, *cp_page_2;
> + struct grub_f2fs_checkpoint *cp_block;
> + grub_uint64_t cur_version = 0, pre_version = 0;
> + grub_uint32_t crc = 0;
> + grub_uint32_t crc_offset;
> + grub_err_t err;
> +
> + /* Read the 1st cp block in this CP pack */
> + cp_page_1 = grub_malloc (F2FS_BLKSIZE);
> + if (!cp_page_1)
> + return NULL;
> +
> + err = grub_f2fs_block_read (data, cp_addr, cp_page_1);
> + if (err)
> + goto invalid_cp1;
> +
> + cp_block = (struct grub_f2fs_checkpoint *)cp_page_1;
> + crc_offset = grub_le_to_cpu32 (cp_block->checksum_offset);
> + if (crc_offset != CHECKSUM_OFFSET)
> + goto invalid_cp1;
> +
> + crc = grub_le_to_cpu32 (*(cp_page_1 + U32_CHECKSUM_OFFSET));
> + if (!grub_f2fs_crc_valid (crc, cp_block, crc_offset))
> + goto invalid_cp1;
> +
> + pre_version = grub_le_to_cpu64 (cp_block->checkpoint_ver);
> +
> + /* Read the 2nd cp block in this CP pack */
> + cp_page_2 = grub_malloc (F2FS_BLKSIZE);
> + if (!cp_page_2)
> + goto invalid_cp1;
> +
> + cp_addr += grub_le_to_cpu32 (cp_block->cp_pack_total_block_count) - 1;
> +
> + err = grub_f2fs_block_read (data, cp_addr, cp_page_2);
> + if (err)
> + goto invalid_cp2;
> +
> + cp_block = (struct grub_f2fs_checkpoint *)cp_page_2;
> + crc_offset = grub_le_to_cpu32 (cp_block->checksum_offset);
> + if (crc_offset != CHECKSUM_OFFSET)
> + goto invalid_cp2;
> +
> + crc = grub_le_to_cpu32 (*(cp_page_2 + U32_CHECKSUM_OFFSET));
> + if (!grub_f2fs_crc_valid (crc, cp_block, crc_offset))
> + goto invalid_cp2;
> +
> + cur_version = grub_le_to_cpu64 (cp_block->checkpoint_ver);
> + if (cur_version == pre_version)
> + {
> + *version = cur_version;
> + grub_free (cp_page_2);
> + return cp_page_1;
> + }
> +
> +invalid_cp2:
> + grub_free (cp_page_2);
> +invalid_cp1:
> + grub_free (cp_page_1);
> + return NULL;
> +}
> +
> +static grub_err_t
> +grub_f2fs_read_cp (struct grub_f2fs_data *data)
> +{
> + void *cp1, *cp2, *cur_page;
> + grub_uint64_t cp1_version = 0, cp2_version = 0;
> + grub_uint64_t cp_start_blk_no;
> +
> + /*
> + * Finding out valid cp block involves read both
> + * sets (cp pack1 and cp pack 2)
> + */
> + cp_start_blk_no = data->cp_blkaddr;
> + cp1 = validate_checkpoint (data, cp_start_blk_no, &cp1_version);
> + if (!cp1 && grub_errno)
> + return grub_errno;
> +
> + /* The second checkpoint pack should start at the next segment */
> + cp_start_blk_no += data->blocks_per_seg;
> + cp2 = validate_checkpoint (data, cp_start_blk_no, &cp2_version);
> + if (!cp2 && grub_errno)
> + {
> + grub_free (cp1);
> + return grub_errno;
> + }
> +
> + if (cp1 && cp2)
> + cur_page = (cp2_version > cp1_version) ? cp2 : cp1;
> + else if (cp1)
> + cur_page = cp1;
> + else if (cp2)
> + cur_page = cp2;
> + else
> + return grub_error (GRUB_ERR_BAD_FS, "no checkpoints");
> +
> + grub_memcpy (&data->ckpt, cur_page, F2FS_BLKSIZE);
> +
> + grub_free (cp1);
> + grub_free (cp2);
> + return 0;
> +}
> +
> +static grub_err_t
> +get_nat_journal (struct grub_f2fs_data *data)
> +{
> + grub_uint32_t block;
> + char *buf;
> + grub_err_t err;
> +
> + buf = grub_malloc (F2FS_BLKSIZE);
> + if (!buf)
> + return grub_errno;
> +
> + if (CKPT_FLAG_SET(&data->ckpt, CP_COMPACT_SUM_FLAG))
> + block = __start_sum_block (data);
> + else if (CKPT_FLAG_SET (&data->ckpt, CP_UMOUNT_FLAG))
> + block = __sum_blk_addr (data, NR_CURSEG_TYPE, CURSEG_HOT_DATA);
> + else
> + block = __sum_blk_addr (data, NR_CURSEG_DATA_TYPE, CURSEG_HOT_DATA);
> +
> + err = grub_f2fs_block_read (data, block, buf);
> + if (err)
> + goto fail;
> +
> + if (CKPT_FLAG_SET (&data->ckpt, CP_COMPACT_SUM_FLAG))
> + grub_memcpy (&data->nat_j, buf, SUM_JOURNAL_SIZE);
> + else
> + grub_memcpy (&data->nat_j, buf + SUM_ENTRIES_SIZE, SUM_JOURNAL_SIZE);
> +
> +fail:
> + grub_free (buf);
> + return err;
> +}
> +
> +static grub_uint32_t
> +get_blkaddr_from_nat_journal (struct grub_f2fs_data *data, grub_uint32_t nid)
> +{
> + grub_uint16_t n = grub_le_to_cpu16 (data->nat_j.n_nats);
> + grub_uint32_t blkaddr = 0;
> + grub_uint16_t i;
> +
> + for (i = 0; i < n; i++)
> + {
> + if (grub_le_to_cpu32 (data->nat_j.entries[i].nid) == nid)
> + {
> + blkaddr = grub_le_to_cpu32 (data->nat_j.entries[i].ne.block_addr);
> + break;
> + }
> + }
> + return blkaddr;
> +}
> +
> +static grub_uint32_t
> +get_node_blkaddr (struct grub_f2fs_data *data, grub_uint32_t nid)
> +{
> + struct grub_f2fs_nat_block *nat_block;
> + grub_uint32_t seg_off, block_off, entry_off, block_addr;
> + grub_uint32_t blkaddr;
> + grub_err_t err;
> +
> + blkaddr = get_blkaddr_from_nat_journal (data, nid);
> + if (blkaddr)
> + return blkaddr;
> +
> + nat_block = grub_malloc (F2FS_BLKSIZE);
> + if (!nat_block)
> + return 0;
> +
> + block_off = nid / NAT_ENTRY_PER_BLOCK;
> + entry_off = nid % NAT_ENTRY_PER_BLOCK;
> +
> + seg_off = block_off / data->blocks_per_seg;
> + block_addr = data->nat_blkaddr +
> + ((seg_off * data->blocks_per_seg) << 1) +
> + (block_off & (data->blocks_per_seg - 1));
> +
> + if (grub_f2fs_test_bit (block_off, data->nat_bitmap))
> + block_addr += data->blocks_per_seg;
> +
> + err = grub_f2fs_block_read (data, block_addr, nat_block);
> + if (err)
> + {
> + grub_free (nat_block);
> + return 0;
> + }
> +
> + blkaddr = grub_le_to_cpu32 (nat_block->ne[entry_off].block_addr);
> +
> + grub_free (nat_block);
> +
> + return blkaddr;
> +}
> +
> +static int
> +grub_get_node_path (struct grub_f2fs_inode *inode, grub_uint32_t block,
> + grub_uint32_t offset[4], grub_uint32_t noffset[4])
> +{
> + grub_uint32_t direct_blks = ADDRS_PER_BLOCK;
> + grub_uint32_t dptrs_per_blk = NIDS_PER_BLOCK;
> + grub_uint32_t indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
> + grub_uint32_t dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
> + grub_uint32_t direct_index = DEF_ADDRS_PER_INODE;
> + int n = 0;
> + int level = 0;
> +
> + if (inode->i_inline & F2FS_INLINE_XATTR)
> + direct_index -= F2FS_INLINE_XATTR_ADDRS;
> +
> + noffset[0] = 0;
> +
> + if (block < direct_index)
> + {
> + offset[n] = block;
> + goto got;
> + }
> +
> + block -= direct_index;
> + if (block < direct_blks)
> + {
> + offset[n++] = NODE_DIR1_BLOCK;
> + noffset[n] = 1;
> + offset[n] = block;
> + level = 1;
> + goto got;
> + }
> +
> + block -= direct_blks;
> + if (block < direct_blks)
> + {
> + offset[n++] = NODE_DIR2_BLOCK;
> + noffset[n] = 2;
> + offset[n] = block;
> + level = 1;
> + goto got;
> + }
> +
> + block -= direct_blks;
> + if (block < indirect_blks)
> + {
> + offset[n++] = NODE_IND1_BLOCK;
> + noffset[n] = 3;
> + offset[n++] = block / direct_blks;
> + noffset[n] = 4 + offset[n - 1];
> + offset[n] = block % direct_blks;
> + level = 2;
> + goto got;
> + }
> +
> + block -= indirect_blks;
> + if (block < indirect_blks)
> + {
> + offset[n++] = NODE_IND2_BLOCK;
> + noffset[n] = 4 + dptrs_per_blk;
> + offset[n++] = block / direct_blks;
> + noffset[n] = 5 + dptrs_per_blk + offset[n - 1];
> + offset[n] = block % direct_blks;
> + level = 2;
> + goto got;
> + }
> +
> + block -= indirect_blks;
> + if (block < dindirect_blks)
> + {
> + offset[n++] = NODE_DIND_BLOCK;
> + noffset[n] = 5 + (dptrs_per_blk * 2);
> + offset[n++] = block / indirect_blks;
> + noffset[n] = 6 + (dptrs_per_blk * 2) +
> + offset[n - 1] * (dptrs_per_blk + 1);
> + offset[n++] = (block / direct_blks) % dptrs_per_blk;
> + noffset[n] = 7 + (dptrs_per_blk * 2) +
> + offset[n - 2] * (dptrs_per_blk + 1) + offset[n - 1];
> + offset[n] = block % direct_blks;
> + level = 3;
> + goto got;
> + }
> +got:
> + return level;
> +}
> +
> +static grub_err_t
> +grub_f2fs_read_node (struct grub_f2fs_data *data,
> + grub_uint32_t nid, struct grub_f2fs_node *np)
> +{
> + grub_uint32_t blkaddr;
> +
> + blkaddr = get_node_blkaddr (data, nid);
> + if (!blkaddr)
> + return grub_errno;
> +
> + return grub_f2fs_block_read (data, blkaddr, np);
> +}
> +
> +static struct grub_f2fs_data *
> +grub_f2fs_mount (grub_disk_t disk)
> +{
> + struct grub_f2fs_data *data;
> + grub_err_t err;
> +
> + data = grub_malloc (sizeof (*data));
> + if (!data)
> + return NULL;
> +
> + data->disk = disk;
> +
> + if (grub_f2fs_read_sb (data, F2FS_SUPER_OFFSET0))
> + {
> + if (grub_f2fs_read_sb (data, F2FS_SUPER_OFFSET1))
> + {
> + if (grub_errno == GRUB_ERR_NONE)
> + grub_error (GRUB_ERR_BAD_FS,
> + "not a F2FS filesystem (no superblock)");
> + goto fail;
> + }
> + }
> +
> + data->root_ino = grub_le_to_cpu32 (data->sblock.root_ino);
> + data->cp_blkaddr = grub_le_to_cpu32 (data->sblock.cp_blkaddr);
> + data->nat_blkaddr = grub_le_to_cpu32 (data->sblock.nat_blkaddr);
> + data->blocks_per_seg = 1 <<
> + grub_le_to_cpu32 (data->sblock.log_blocks_per_seg);
> +
> + err = grub_f2fs_read_cp (data);
> + if (err)
> + goto fail;
> +
> + data->nat_bitmap = __nat_bitmap_ptr (data);
> +
> + err = get_nat_journal (data);
> + if (err)
> + goto fail;
> +
> + data->diropen.data = data;
> + data->diropen.ino = data->root_ino;
> + data->diropen.inode_read = 1;
> + data->inode = &data->diropen.inode;
> +
> + err = grub_f2fs_read_node (data, data->root_ino, data->inode);
> + if (err)
> + goto fail;
> +
> + return data;
> +
> +fail:
> + grub_free (data);
> + return NULL;
> +}
> +
> +/* guarantee inline_data was handled by caller */
> +static grub_disk_addr_t
> +grub_f2fs_get_block (grub_fshelp_node_t node, grub_disk_addr_t block_ofs)
> +{
> + struct grub_f2fs_data *data = node->data;
> + struct grub_f2fs_inode *inode = &node->inode.i;
> + grub_uint32_t offset[4], noffset[4], nids[4];
> + struct grub_f2fs_node *node_block;
> + grub_uint32_t block_addr = -1;
> + int level, i;
> +
> + level = grub_get_node_path (inode, block_ofs, offset, noffset);
> + if (level == 0)
> + return grub_le_to_cpu32 (inode->i_addr[offset[0]]);
> +
> + node_block = grub_malloc (F2FS_BLKSIZE);
> + if (!node_block)
> + return -1;
> +
> + nids[1] = __get_node_id (&node->inode, offset[0], 1);
> +
> + /* get indirect or direct nodes */
> + for (i = 1; i <= level; i++)
> + {
> + grub_f2fs_read_node (data, nids[i], node_block);
> + if (grub_errno)
> + goto fail;
> +
> + if (i < level)
> + nids[i + 1] = __get_node_id (node_block, offset[i], 0);
> + }
> +
> + block_addr = grub_le_to_cpu32 (node_block->dn.addr[offset[level]]);
> +fail:
> + grub_free (node_block);
> + return block_addr;
> +}
> +
> +static grub_ssize_t
> +grub_f2fs_read_file (grub_fshelp_node_t node,
> + grub_disk_read_hook_t read_hook, void *read_hook_data,
> + grub_off_t pos, grub_size_t len, char *buf)
> +{
> + struct grub_f2fs_inode *inode = &node->inode.i;
> + grub_off_t filesize = grub_f2fs_file_size (inode);
> + char *inline_addr = __inline_addr (inode);
> +
> + if (inode->i_inline & F2FS_INLINE_DATA)
> + {
> + if (filesize > MAX_INLINE_DATA)
> + return -1;
> + if (len > filesize - pos)
> + len = filesize - pos;
> +
> + grub_memcpy (buf + pos, inline_addr + pos, len);
> + return len;
> + }
> +
> + return grub_fshelp_read_file (node->data->disk, node,
> + read_hook, read_hook_data,
> + pos, len, buf, grub_f2fs_get_block,
> + filesize,
> + F2FS_BLK_SEC_BITS, 0);
> +}
> +
> +static char *
> +grub_f2fs_read_symlink (grub_fshelp_node_t node)
> +{
> + char *symlink;
> + struct grub_fshelp_node *diro = node;
> + grub_uint64_t filesize;
> +
> + if (!diro->inode_read)
> + {
> + grub_f2fs_read_node (diro->data, diro->ino, &diro->inode);
> + if (grub_errno)
> + return 0;
> + }
> +
> + filesize = grub_f2fs_file_size(&diro->inode.i);
> +
> + symlink = grub_malloc (filesize + 1);
> + if (!symlink)
> + return 0;
> +
> + grub_f2fs_read_file (diro, 0, 0, 0, filesize, symlink);
> + if (grub_errno)
> + {
> + grub_free (symlink);
> + return 0;
> + }
> +
> + symlink[filesize] = '\0';
> + return symlink;
> +}
> +
> +static int
> +grub_f2fs_check_dentries (struct grub_f2fs_dir_iter_ctx *ctx)
> +{
> + struct grub_fshelp_node *fdiro;
> + int i;
> +
> + for (i = 0; i < ctx->max;)
> + {
> + char *filename;
> + enum grub_fshelp_filetype type = GRUB_FSHELP_UNKNOWN;
> + enum FILE_TYPE ftype;
> + int name_len;
> + int ret;
> +
> + if (grub_f2fs_test_bit_le (i, ctx->bitmap) == 0)
> + {
> + i++;
> + continue;
> + }
> +
> + ftype = ctx->dentry[i].file_type;
> + name_len = grub_le_to_cpu16 (ctx->dentry[i].name_len);
> + filename = grub_malloc (name_len + 1);
> + if (!filename)
> + return 0;
> +
> + grub_memcpy (filename, ctx->filename[i], name_len);
> + filename[name_len] = 0;
> +
> + fdiro = grub_malloc (sizeof (struct grub_fshelp_node));
> + if (!fdiro)
> + {
> + grub_free(filename);
> + return 0;
> + }
> +
> + if (ftype == F2FS_FT_DIR)
> + type = GRUB_FSHELP_DIR;
> + else if (ftype == F2FS_FT_SYMLINK)
> + type = GRUB_FSHELP_SYMLINK;
> + else if (ftype == F2FS_FT_REG_FILE)
> + type = GRUB_FSHELP_REG;
> +
> + fdiro->data = ctx->data;
> + fdiro->ino = grub_le_to_cpu32 (ctx->dentry[i].ino);
> + fdiro->inode_read = 0;
> +
> + ret = ctx->hook (filename, type, fdiro, ctx->hook_data);
> + grub_free(filename);
> + if (ret)
> + return 1;
> +
> + i += (name_len + F2FS_SLOT_LEN - 1) / F2FS_SLOT_LEN;
> + }
> + return 0;
> +}
> +
> +static int
> +grub_f2fs_iterate_inline_dir (struct grub_f2fs_inode *dir,
> + struct grub_f2fs_dir_iter_ctx *ctx)
> +{
> + struct grub_f2fs_inline_dentry *de_blk;
> +
> + de_blk = (struct grub_f2fs_inline_dentry *) __inline_addr (dir);
> +
> + ctx->bitmap = de_blk->dentry_bitmap;
> + ctx->dentry = de_blk->dentry;
> + ctx->filename = de_blk->filename;
> + ctx->max = NR_INLINE_DENTRY;
> +
> + return grub_f2fs_check_dentries (ctx);
> +}
> +
> +static int
> +grub_f2fs_iterate_dir (grub_fshelp_node_t dir,
> + grub_fshelp_iterate_dir_hook_t hook, void *hook_data)
> +{
> + struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
> + struct grub_f2fs_inode *inode;
> + struct grub_f2fs_dir_iter_ctx ctx = {
> + .data = diro->data,
> + .hook = hook,
> + .hook_data = hook_data
> + };
> + grub_off_t fpos = 0;
> +
> + if (!diro->inode_read)
> + {
> + grub_f2fs_read_node (diro->data, diro->ino, &diro->inode);
> + if (grub_errno)
> + return 0;
> + }
> +
> + inode = &diro->inode.i;
> +
> + if (inode->i_inline & F2FS_INLINE_DENTRY)
> + return grub_f2fs_iterate_inline_dir (inode, &ctx);
> +
> + while (fpos < grub_f2fs_file_size (inode))
> + {
> + struct grub_f2fs_dentry_block *de_blk;
> + char *buf;
> + int ret;
> +
> + buf = grub_zalloc (F2FS_BLKSIZE);
> + if (!buf)
> + return 0;
> +
> + grub_f2fs_read_file (diro, 0, 0, fpos, F2FS_BLKSIZE, buf);
> + if (grub_errno)
> + {
> + grub_free (buf);
> + return 0;
> + }
> +
> + de_blk = (struct grub_f2fs_dentry_block *) buf;
> +
> + ctx.bitmap = de_blk->dentry_bitmap;
> + ctx.dentry = de_blk->dentry;
> + ctx.filename = de_blk->filename;
> + ctx.max = NR_DENTRY_IN_BLOCK;
> +
> + ret = grub_f2fs_check_dentries (&ctx);
> + grub_free (buf);
> + if (ret)
> + return 1;
> +
> + fpos += F2FS_BLKSIZE;
> + }
> + return 0;
> +}
> +
> +static int
> +grub_f2fs_dir_iter (const char *filename, enum grub_fshelp_filetype filetype,
> + grub_fshelp_node_t node, void *data)
> +{
> + struct grub_f2fs_dir_ctx *ctx = data;
> + struct grub_dirhook_info info;
> +
> + grub_memset (&info, 0, sizeof (info));
> + if (!node->inode_read)
> + {
> + grub_f2fs_read_node (ctx->data, node->ino, &node->inode);
> + if (!grub_errno)
> + node->inode_read = 1;
> + grub_errno = GRUB_ERR_NONE;
> + }
> + if (node->inode_read)
> + {
> + info.mtimeset = 1;
> + info.mtime = grub_le_to_cpu64 (node->inode.i.i_mtime);
> + }
> +
> + info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
> + grub_free (node);
> + return ctx->hook (filename, &info, ctx->hook_data);
> +}
> +
> +static grub_err_t
> +grub_f2fs_dir (grub_device_t device, const char *path,
> + grub_fs_dir_hook_t hook, void *hook_data)
> +{
> + struct grub_f2fs_dir_ctx ctx = {
> + .hook = hook,
> + .hook_data = hook_data
> + };
> + struct grub_fshelp_node *fdiro = 0;
> +
> + grub_dl_ref (my_mod);
> +
> + ctx.data = grub_f2fs_mount (device->disk);
> + if (!ctx.data)
> + goto fail;
> +
> + grub_fshelp_find_file (path, &ctx.data->diropen, &fdiro,
> + grub_f2fs_iterate_dir, grub_f2fs_read_symlink,
> + GRUB_FSHELP_DIR);
> + if (grub_errno)
> + goto fail;
> +
> + grub_f2fs_iterate_dir (fdiro, grub_f2fs_dir_iter, &ctx);
> +
> +fail:
> + if (fdiro != &ctx.data->diropen)
> + grub_free (fdiro);
> + grub_free (ctx.data);
> + grub_dl_unref (my_mod);
> + return grub_errno;
> +}
> +
> +
> +/* Open a file named NAME and initialize FILE. */
> +static grub_err_t
> +grub_f2fs_open (struct grub_file *file, const char *name)
> +{
> + struct grub_f2fs_data *data = NULL;
> + struct grub_fshelp_node *fdiro = 0;
> + struct grub_f2fs_inode *inode;
> +
> + grub_dl_ref (my_mod);
> +
> + data = grub_f2fs_mount (file->device->disk);
> + if (!data)
> + goto fail;
> +
> + grub_fshelp_find_file (name, &data->diropen, &fdiro,
> + grub_f2fs_iterate_dir, grub_f2fs_read_symlink,
> + GRUB_FSHELP_REG);
> + if (grub_errno)
> + goto fail;
> +
> + if (!fdiro->inode_read)
> + {
> + grub_f2fs_read_node (data, fdiro->ino, &fdiro->inode);
> + if (grub_errno)
> + goto fail;
> + }
> +
> + grub_memcpy (data->inode, &fdiro->inode, sizeof (*data->inode));
> + grub_free (fdiro);
> +
> + inode = &(data->inode->i);
> + file->size = grub_f2fs_file_size (inode);
> + file->data = data;
> + file->offset = 0;
> +
> + if (inode->i_inline & F2FS_INLINE_DATA && file->size > MAX_INLINE_DATA)
> + grub_error (GRUB_ERR_BAD_FS, "corrupted inline_data: need fsck");
> + return 0;
> +
> +fail:
> + if (fdiro != &data->diropen)
> + grub_free (fdiro);
> + grub_free (data);
> +
> + grub_dl_unref (my_mod);
> +
> + return grub_errno;
> +}
> +
> +static grub_ssize_t
> +grub_f2fs_read (grub_file_t file, char *buf, grub_size_t len)
> +{
> + struct grub_f2fs_data *data = (struct grub_f2fs_data *) file->data;
> +
> + return grub_f2fs_read_file (&data->diropen,
> + file->read_hook, file->read_hook_data,
> + file->offset, len, buf);
> +}
> +
> +static grub_err_t
> +grub_f2fs_close (grub_file_t file)
> +{
> + struct grub_f2fs_data *data = (struct grub_f2fs_data *) file->data;
> +
> + grub_free (data);
> +
> + grub_dl_unref (my_mod);
> +
> + return GRUB_ERR_NONE;
> +}
> +
> +static grub_uint8_t *
> +grub_f2fs_utf16_to_utf8 (grub_uint16_t *in_buf_le)
> +{
> + grub_uint16_t in_buf[MAX_VOLUME_NAME];
> + grub_uint8_t *out_buf;
> + int len = 0;
> +
> + out_buf = grub_malloc (MAX_VOLUME_NAME * GRUB_MAX_UTF8_PER_UTF16 + 1);
> + if (!out_buf)
> + return NULL;
> +
> + while (*in_buf_le != 0 && len < MAX_VOLUME_NAME) {
> + in_buf[len] = grub_le_to_cpu16 (in_buf_le[len]);
> + len++;
> + }
> +
> + *grub_utf16_to_utf8 (out_buf, in_buf, len) = '\0';
> + return out_buf;
> +}
> +
> +static grub_err_t
> +grub_f2fs_label (grub_device_t device, char **label)
> +{
> + struct grub_f2fs_data *data;
> + grub_disk_t disk = device->disk;
> +
> + grub_dl_ref (my_mod);
> +
> + data = grub_f2fs_mount (disk);
> + if (data)
> + *label = (char *) grub_f2fs_utf16_to_utf8 (data->sblock.volume_name);
> + else
> + *label = NULL;
> +
> + grub_free (data);
> + grub_dl_unref (my_mod);
> + return grub_errno;
> +}
> +
> +static grub_err_t
> +grub_f2fs_uuid (grub_device_t device, char **uuid)
> +{
> + struct grub_f2fs_data *data;
> + grub_disk_t disk = device->disk;
> +
> + grub_dl_ref (my_mod);
> +
> + data = grub_f2fs_mount (disk);
> + if (data)
> + {
> + *uuid =
> + grub_xasprintf
> + ("%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
> + data->sblock.uuid[0], data->sblock.uuid[1],
> + data->sblock.uuid[2], data->sblock.uuid[3],
> + data->sblock.uuid[4], data->sblock.uuid[5],
> + data->sblock.uuid[6], data->sblock.uuid[7],
> + data->sblock.uuid[8], data->sblock.uuid[9],
> + data->sblock.uuid[10], data->sblock.uuid[11],
> + data->sblock.uuid[12], data->sblock.uuid[13],
> + data->sblock.uuid[14], data->sblock.uuid[15]);
> + }
> + else
> + *uuid = NULL;
> +
> + grub_free (data);
> + grub_dl_unref (my_mod);
> + return grub_errno;
> +}
> +
> +static struct grub_fs grub_f2fs_fs = {
> + .name = "f2fs",
> + .dir = grub_f2fs_dir,
> + .open = grub_f2fs_open,
> + .read = grub_f2fs_read,
> + .close = grub_f2fs_close,
> + .label = grub_f2fs_label,
> + .uuid = grub_f2fs_uuid,
> +#ifdef GRUB_UTIL
> + .reserved_first_sector = 1,
> + .blocklist_install = 0,
> +#endif
> + .next = 0
> +};
> +
> +GRUB_MOD_INIT (f2fs)
> +{
> + grub_fs_register (&grub_f2fs_fs);
> + my_mod = mod;
> +}
> +
> +GRUB_MOD_FINI (f2fs)
> +{
> + grub_fs_unregister (&grub_f2fs_fs);
> +}
> diff --git a/po/exclude.pot b/po/exclude.pot
> index 0a9b215..816089c 100644
> --- a/po/exclude.pot
> +++ b/po/exclude.pot
> @@ -1214,6 +1214,7 @@ msgstr ""
>
> #: grub-core/commands/xnu_uuid.c:75 grub-core/fs/jfs.c:924
> #: grub-core/fs/nilfs2.c:1135
> +#: grub-core/fs/f2fs.c:1259
> #, c-format
> msgid "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
> msgstr ""
> diff --git a/tests/f2fs_test.in b/tests/f2fs_test.in
> new file mode 100644
> index 0000000..1ea77c8
> --- /dev/null
> +++ b/tests/f2fs_test.in
> @@ -0,0 +1,19 @@
> +#!/bin/sh
> +
> +set -e
> +
> +if [ "x$EUID" = "x" ] ; then
> + EUID=`id -u`
> +fi
> +
> +if [ "$EUID" != 0 ] ; then
> + exit 77
> +fi
> +
> +if ! which mkfs.f2fs >/dev/null 2>&1; then
> + echo "mkfs.f2fs not installed; cannot test f2fs."
> + exit 77
> +fi
> +
> +
> +"@builddir@/grub-fs-tester" f2fs
> diff --git a/tests/util/grub-fs-tester.in b/tests/util/grub-fs-tester.in
> index 424de22..e3e4109 100644
> --- a/tests/util/grub-fs-tester.in
> +++ b/tests/util/grub-fs-tester.in
> @@ -142,7 +142,7 @@ for
> ((LOGSECSIZE=MINLOGSECSIZE;LOGSECSIZE<=MAXLOGSECSIZE;LOGSECSIZE=LOGSECSIZE +
> xsquash*)
> MINBLKSIZE=4096
> MAXBLKSIZE=1048576;;
> - xxfs)
> + xxfs|xf2fs)
> MINBLKSIZE=$SECSIZE
> # OS Limitation: GNU/Linux doesn't accept > 4096
> MAXBLKSIZE=4096;;
> @@ -265,6 +265,10 @@ for
> ((LOGSECSIZE=MINLOGSECSIZE;LOGSECSIZE<=MAXLOGSECSIZE;LOGSECSIZE=LOGSECSIZE +
> x"btrfs"*)
> FSLABEL="grub_;/testé莭莽😁киритi
> urewfceniuewruevrewnuuireurevueurnievrewfnerfcnevirivinrewvnirewnivrewiuvcrewvnuewvrrrewniuerwreiuviurewiuviurewnuvewnvrenurnunuvrevuurerejiremvreijnvcreivire
> nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoireoif";;
>
> + # FS LIMITATION: f2fs label is at most 512 UTF-16 chars
> + x"f2fs")
> +
> FSLABEL="grub_;/testé䏌䐓䏕киритiurewfceniuewruewnuuireurevueurnievrewfnerfcnevirivinrewvnirewnivrewiuvcrewvnuewvrrrewniuerwreiuviurewiuviurewnuvewnvrenurnunuvrevuurerejiremvreijnvvcreivire
> nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoirvcreivire
> nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoircreivire
> nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoireoifoiq";;
> +
> # FS LIMITATION: exfat is at most 15 UTF-16 chars
> x"exfat")
> FSLABEL="géт ;/莭莽😁кир";;
> @@ -474,7 +478,7 @@ for
> ((LOGSECSIZE=MINLOGSECSIZE;LOGSECSIZE<=MAXLOGSECSIZE;LOGSECSIZE=LOGSECSIZE +
> # FIXME: Not sure about BtrFS, NTFS, JFS, AFS, UDF and SFS. Check
> it.
> # FS LIMITATION: as far as I know those FS don't store their last
> modification date.
> x"jfs_caseins" | x"jfs" | x"xfs" | x"xfs_crc" | x"btrfs"* |
> x"reiserfs_old" | x"reiserfs" \
> - | x"bfs" | x"afs" \
> + | x"bfs" | x"afs" | x"f2fs" \
> | x"tarfs" | x"cpio_"* | x"minix" | x"minix2" \
> | x"minix3" | x"ntfs"* | x"udf" | x"sfs"*)
> NOFSTIME=y;;
> @@ -753,6 +757,8 @@ for
> ((LOGSECSIZE=MINLOGSECSIZE;LOGSECSIZE<=MAXLOGSECSIZE;LOGSECSIZE=LOGSECSIZE +
> MOUNTDEVICE="/dev/mapper/grub_test-testvol"
> MOUNTFS=ext2
> "mkfs.ext2" -L "$FSLABEL" -q "${MOUNTDEVICE}" ;;
> + xf2fs)
> + "mkfs.f2fs" -l "$FSLABEL" -q "${LODEVICES[0]}" ;;
> xnilfs2)
> "mkfs.nilfs2" -L "$FSLABEL" -b $BLKSIZE -q
> "${LODEVICES[0]}" ;;
> xext2_old)
>
- [2.02] Re: [f2fs-dev] [PATCH v7] F2FS support,
Andrei Borzenkov <=