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Re: [f2fs-dev] [2.02] Re: [PATCH v8] F2FS support
From: |
Jaegeuk Kim |
Subject: |
Re: [f2fs-dev] [2.02] Re: [PATCH v8] F2FS support |
Date: |
Fri, 5 Aug 2016 11:07:37 -0700 |
User-agent: |
Mutt/1.6.0 (2016-04-01) |
On Fri, Aug 05, 2016 at 01:57:37PM +0300, Andrei Borzenkov wrote:
> Vladimir prefers to postpone new features until 2.02 is out. From my
> side I think it is isolated enough and new code so low regression
> risk. Vladimir has the final word as maintainer :)
Okay, I can wait for 2.02. ;)
BTW, I've heard that openmandriva adopted this patch to support F2FS in their
installer.
Thanks,
>
> On Thu, Aug 4, 2016 at 8:06 PM, Jaegeuk Kim <address@hidden> wrote:
> > Hi Andrei,
> >
> > It's been sitting for a long long time.
> > May I ask whether or not there is any merging plan of this?
> >
> > Thanks,
> >
> > On Thu, Mar 03, 2016 at 01:36:53PM -0800, Jaegeuk Kim wrote:
> >> Change log from v7:
> >> - fix an offset bug in read_file
> >>
> >> -- >8 --
> >> From d774cdecc2fee18ed44098c88d2a54d358bc04d3 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..7fb256f
> >> --- /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, 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)
> >> --
> >> 2.6.3
> >>
> >>
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