2N/A/*
2N/A * nilfs2.c - New Implementation of Log filesystem
2N/A *
2N/A * Written by Jiro SEKIBA <jir@unicus.jp>
2N/A *
2N/A * Copyright (C) 2003,2004,2005,2007,2008,2010 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A
2N/A/* Filetype information as used in inodes. */
2N/A#define FILETYPE_INO_MASK 0170000
2N/A#define FILETYPE_INO_REG 0100000
2N/A#define FILETYPE_INO_DIRECTORY 0040000
2N/A#define FILETYPE_INO_SYMLINK 0120000
2N/A
2N/A#include <grub/err.h>
2N/A#include <grub/file.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/disk.h>
2N/A#include <grub/dl.h>
2N/A#include <grub/types.h>
2N/A#include <grub/fshelp.h>
2N/A
2N/AGRUB_MOD_LICENSE ("GPLv3+");
2N/A
2N/A#define NILFS_INODE_BMAP_SIZE 7
2N/A
2N/A#define NILFS_SUPORT_REV 2
2N/A
2N/A/* Magic value used to identify an nilfs2 filesystem. */
2N/A#define NILFS2_SUPER_MAGIC 0x3434
2N/A/* nilfs btree node flag. */
2N/A#define NILFS_BTREE_NODE_ROOT 0x01
2N/A
2N/A/* nilfs btree node level. */
2N/A#define NILFS_BTREE_LEVEL_DATA 0
2N/A#define NILFS_BTREE_LEVEL_NODE_MIN (NILFS_BTREE_LEVEL_DATA + 1)
2N/A
2N/A/* nilfs 1st super block posission from beginning of the partition
2N/A in 512 block size */
2N/A#define NILFS_1ST_SUPER_BLOCK 2
2N/A/* nilfs 2nd super block posission from beginning of the partition
2N/A in 512 block size */
2N/A#define NILFS_2ND_SUPER_BLOCK(devsize) (((devsize >> 3) - 1) << 3)
2N/A
2N/A#define LOG_INODE_SIZE 7
2N/Astruct grub_nilfs2_inode
2N/A{
2N/A grub_uint64_t i_blocks;
2N/A grub_uint64_t i_size;
2N/A grub_uint64_t i_ctime;
2N/A grub_uint64_t i_mtime;
2N/A grub_uint32_t i_ctime_nsec;
2N/A grub_uint32_t i_mtime_nsec;
2N/A grub_uint32_t i_uid;
2N/A grub_uint32_t i_gid;
2N/A grub_uint16_t i_mode;
2N/A grub_uint16_t i_links_count;
2N/A grub_uint32_t i_flags;
2N/A grub_uint64_t i_bmap[NILFS_INODE_BMAP_SIZE];
2N/A#define i_device_code i_bmap[0]
2N/A grub_uint64_t i_xattr;
2N/A grub_uint32_t i_generation;
2N/A grub_uint32_t i_pad;
2N/A};
2N/A
2N/Astruct grub_nilfs2_super_root
2N/A{
2N/A grub_uint32_t sr_sum;
2N/A grub_uint16_t sr_bytes;
2N/A grub_uint16_t sr_flags;
2N/A grub_uint64_t sr_nongc_ctime;
2N/A struct grub_nilfs2_inode sr_dat;
2N/A struct grub_nilfs2_inode sr_cpfile;
2N/A struct grub_nilfs2_inode sr_sufile;
2N/A};
2N/A
2N/Astruct grub_nilfs2_super_block
2N/A{
2N/A grub_uint32_t s_rev_level;
2N/A grub_uint16_t s_minor_rev_level;
2N/A grub_uint16_t s_magic;
2N/A grub_uint16_t s_bytes;
2N/A grub_uint16_t s_flags;
2N/A grub_uint32_t s_crc_seed;
2N/A grub_uint32_t s_sum;
2N/A grub_uint32_t s_log_block_size;
2N/A grub_uint64_t s_nsegments;
2N/A grub_uint64_t s_dev_size;
2N/A grub_uint64_t s_first_data_block;
2N/A grub_uint32_t s_blocks_per_segment;
2N/A grub_uint32_t s_r_segments_percentage;
2N/A grub_uint64_t s_last_cno;
2N/A grub_uint64_t s_last_pseg;
2N/A grub_uint64_t s_last_seq;
2N/A grub_uint64_t s_free_blocks_count;
2N/A grub_uint64_t s_ctime;
2N/A grub_uint64_t s_mtime;
2N/A grub_uint64_t s_wtime;
2N/A grub_uint16_t s_mnt_count;
2N/A grub_uint16_t s_max_mnt_count;
2N/A grub_uint16_t s_state;
2N/A grub_uint16_t s_errors;
2N/A grub_uint64_t s_lastcheck;
2N/A grub_uint32_t s_checkinterval;
2N/A grub_uint32_t s_creator_os;
2N/A grub_uint16_t s_def_resuid;
2N/A grub_uint16_t s_def_resgid;
2N/A grub_uint32_t s_first_ino;
2N/A grub_uint16_t s_inode_size;
2N/A grub_uint16_t s_dat_entry_size;
2N/A grub_uint16_t s_checkpoint_size;
2N/A grub_uint16_t s_segment_usage_size;
2N/A grub_uint8_t s_uuid[16];
2N/A char s_volume_name[16];
2N/A char s_last_mounted[64];
2N/A grub_uint32_t s_c_interval;
2N/A grub_uint32_t s_c_block_max;
2N/A grub_uint32_t s_reserved[192];
2N/A};
2N/A
2N/Astruct grub_nilfs2_dir_entry
2N/A{
2N/A grub_uint64_t inode;
2N/A grub_uint16_t rec_len;
2N/A grub_uint8_t name_len;
2N/A grub_uint8_t file_type;
2N/A#if 0 /* followed by file name. */
2N/A char name[NILFS_NAME_LEN];
2N/A char pad;
2N/A#endif
2N/A} __attribute__ ((packed));
2N/A
2N/Aenum
2N/A{
2N/A NILFS_FT_UNKNOWN,
2N/A NILFS_FT_REG_FILE,
2N/A NILFS_FT_DIR,
2N/A NILFS_FT_CHRDEV,
2N/A NILFS_FT_BLKDEV,
2N/A NILFS_FT_FIFO,
2N/A NILFS_FT_SOCK,
2N/A NILFS_FT_SYMLINK,
2N/A NILFS_FT_MAX
2N/A};
2N/A
2N/Astruct grub_nilfs2_finfo
2N/A{
2N/A grub_uint64_t fi_ino;
2N/A grub_uint64_t fi_cno;
2N/A grub_uint32_t fi_nblocks;
2N/A grub_uint32_t fi_ndatablk;
2N/A};
2N/A
2N/Astruct grub_nilfs2_binfo_v
2N/A{
2N/A grub_uint64_t bi_vblocknr;
2N/A grub_uint64_t bi_blkoff;
2N/A};
2N/A
2N/Astruct grub_nilfs2_binfo_dat
2N/A{
2N/A grub_uint64_t bi_blkoff;
2N/A grub_uint8_t bi_level;
2N/A grub_uint8_t bi_pad[7];
2N/A};
2N/A
2N/Aunion grub_nilfs2_binfo
2N/A{
2N/A struct grub_nilfs2_binfo_v bi_v;
2N/A struct grub_nilfs2_binfo_dat bi_dat;
2N/A};
2N/A
2N/Astruct grub_nilfs2_segment_summary
2N/A{
2N/A grub_uint32_t ss_datasum;
2N/A grub_uint32_t ss_sumsum;
2N/A grub_uint32_t ss_magic;
2N/A grub_uint16_t ss_bytes;
2N/A grub_uint16_t ss_flags;
2N/A grub_uint64_t ss_seq;
2N/A grub_uint64_t ss_create;
2N/A grub_uint64_t ss_next;
2N/A grub_uint32_t ss_nblocks;
2N/A grub_uint32_t ss_nfinfo;
2N/A grub_uint32_t ss_sumbytes;
2N/A grub_uint32_t ss_pad;
2N/A};
2N/A
2N/Astruct grub_nilfs2_btree_node
2N/A{
2N/A grub_uint8_t bn_flags;
2N/A grub_uint8_t bn_level;
2N/A grub_uint16_t bn_nchildren;
2N/A grub_uint32_t bn_pad;
2N/A grub_uint64_t keys[0];
2N/A};
2N/A
2N/Astruct grub_nilfs2_palloc_group_desc
2N/A{
2N/A grub_uint32_t pg_nfrees;
2N/A};
2N/A
2N/A#define LOG_NILFS_DAT_ENTRY_SIZE 5
2N/Astruct grub_nilfs2_dat_entry
2N/A{
2N/A grub_uint64_t de_blocknr;
2N/A grub_uint64_t de_start;
2N/A grub_uint64_t de_end;
2N/A grub_uint64_t de_rsv;
2N/A};
2N/A
2N/Astruct grub_nilfs2_snapshot_list
2N/A{
2N/A grub_uint64_t ssl_next;
2N/A grub_uint64_t ssl_prev;
2N/A};
2N/A
2N/Astruct grub_nilfs2_cpfile_header
2N/A{
2N/A grub_uint64_t ch_ncheckpoints;
2N/A grub_uint64_t ch_nsnapshots;
2N/A struct grub_nilfs2_snapshot_list ch_snapshot_list;
2N/A};
2N/A
2N/Astruct grub_nilfs2_checkpoint
2N/A{
2N/A grub_uint32_t cp_flags;
2N/A grub_uint32_t cp_checkpoints_count;
2N/A struct grub_nilfs2_snapshot_list cp_snapshot_list;
2N/A grub_uint64_t cp_cno;
2N/A grub_uint64_t cp_create;
2N/A grub_uint64_t cp_nblk_inc;
2N/A grub_uint64_t cp_inodes_count;
2N/A grub_uint64_t cp_blocks_count;
2N/A struct grub_nilfs2_inode cp_ifile_inode;
2N/A};
2N/A
2N/A
2N/A#define NILFS_BMAP_LARGE 0x1
2N/A#define NILFS_BMAP_SIZE (NILFS_INODE_BMAP_SIZE * sizeof(grub_uint64_t))
2N/A
2N/A/* nilfs extra padding for nonroot btree node. */
2N/A#define NILFS_BTREE_NODE_EXTRA_PAD_SIZE (sizeof(grub_uint64_t))
2N/A#define NILFS_BTREE_ROOT_SIZE NILFS_BMAP_SIZE
2N/A#define NILFS_BTREE_ROOT_NCHILDREN_MAX \
2N/A ((NILFS_BTREE_ROOT_SIZE - sizeof(struct nilfs_btree_node)) / \
2N/A (sizeof(grub_uint64_t) + sizeof(grub_uint64_t)) )
2N/A
2N/A
2N/Astruct grub_fshelp_node
2N/A{
2N/A struct grub_nilfs2_data *data;
2N/A struct grub_nilfs2_inode inode;
2N/A grub_uint64_t ino;
2N/A int inode_read;
2N/A};
2N/A
2N/Astruct grub_nilfs2_data
2N/A{
2N/A struct grub_nilfs2_super_block sblock;
2N/A struct grub_nilfs2_super_root sroot;
2N/A struct grub_nilfs2_inode ifile;
2N/A grub_disk_t disk;
2N/A struct grub_nilfs2_inode *inode;
2N/A struct grub_fshelp_node diropen;
2N/A};
2N/A
2N/A/* Log2 size of nilfs2 block in 512 blocks. */
2N/A#define LOG2_NILFS2_BLOCK_SIZE(data) \
2N/A (grub_le_to_cpu32 (data->sblock.s_log_block_size) + 1)
2N/A
2N/A/* Log2 size of nilfs2 block in bytes. */
2N/A#define LOG2_BLOCK_SIZE(data) \
2N/A (grub_le_to_cpu32 (data->sblock.s_log_block_size) + 10)
2N/A
2N/A/* The size of an nilfs2 block in bytes. */
2N/A#define NILFS2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE (data))
2N/A
2N/Astatic grub_uint64_t
2N/Agrub_nilfs2_dat_translate (struct grub_nilfs2_data *data, grub_uint64_t key);
2N/Astatic grub_dl_t my_mod;
2N/A
2N/A
2N/A
2N/Astatic inline unsigned long
2N/Agrub_nilfs2_log_palloc_entries_per_group (struct grub_nilfs2_data *data)
2N/A{
2N/A return LOG2_BLOCK_SIZE (data) + 3;
2N/A}
2N/A
2N/Astatic inline grub_uint64_t
2N/Agrub_nilfs2_palloc_group (struct grub_nilfs2_data *data,
2N/A grub_uint64_t nr, grub_uint64_t * offset)
2N/A{
2N/A *offset = nr & ((1 << grub_nilfs2_log_palloc_entries_per_group (data)) - 1);
2N/A return nr >> grub_nilfs2_log_palloc_entries_per_group (data);
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_palloc_groups_per_desc_block (struct grub_nilfs2_data *data)
2N/A{
2N/A return NILFS2_BLOCK_SIZE (data) /
2N/A sizeof (struct grub_nilfs2_palloc_group_desc);
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_log_entries_per_block_log (struct grub_nilfs2_data *data,
2N/A unsigned long log_entry_size)
2N/A{
2N/A return LOG2_BLOCK_SIZE (data) - log_entry_size;
2N/A}
2N/A
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_blocks_per_group_log (struct grub_nilfs2_data *data,
2N/A unsigned long log_entry_size)
2N/A{
2N/A return (1 << (grub_nilfs2_log_palloc_entries_per_group (data)
2N/A - grub_nilfs2_log_entries_per_block_log (data,
2N/A log_entry_size))) + 1;
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_blocks_per_desc_block_log (struct grub_nilfs2_data *data,
2N/A unsigned long log_entry_size)
2N/A{
2N/A return grub_nilfs2_palloc_groups_per_desc_block (data) *
2N/A grub_nilfs2_blocks_per_group_log (data, log_entry_size) + 1;
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_palloc_desc_block_offset_log (struct grub_nilfs2_data *data,
2N/A unsigned long group,
2N/A unsigned long log_entry_size)
2N/A{
2N/A grub_uint32_t desc_block =
2N/A group / grub_nilfs2_palloc_groups_per_desc_block (data);
2N/A return desc_block * grub_nilfs2_blocks_per_desc_block_log (data,
2N/A log_entry_size);
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_palloc_bitmap_block_offset (struct grub_nilfs2_data *data,
2N/A unsigned long group,
2N/A unsigned long log_entry_size)
2N/A{
2N/A unsigned long desc_offset = group %
2N/A grub_nilfs2_palloc_groups_per_desc_block (data);
2N/A
2N/A return grub_nilfs2_palloc_desc_block_offset_log (data, group, log_entry_size)
2N/A + 1
2N/A + desc_offset * grub_nilfs2_blocks_per_group_log (data, log_entry_size);
2N/A}
2N/A
2N/Astatic inline grub_uint32_t
2N/Agrub_nilfs2_palloc_entry_offset_log (struct grub_nilfs2_data *data,
2N/A grub_uint64_t nr,
2N/A unsigned long log_entry_size)
2N/A{
2N/A unsigned long group;
2N/A grub_uint64_t group_offset;
2N/A
2N/A group = grub_nilfs2_palloc_group (data, nr, &group_offset);
2N/A
2N/A return grub_nilfs2_palloc_bitmap_block_offset (data, group,
2N/A 1 << log_entry_size) + 1 +
2N/A (group_offset >> grub_nilfs2_log_entries_per_block_log (data,
2N/A log_entry_size));
2N/A
2N/A}
2N/A
2N/Astatic inline struct grub_nilfs2_btree_node *
2N/Agrub_nilfs2_btree_get_root (struct grub_nilfs2_inode *inode)
2N/A{
2N/A return (struct grub_nilfs2_btree_node *) &inode->i_bmap[0];
2N/A}
2N/A
2N/Astatic inline int
2N/Agrub_nilfs2_btree_get_level (struct grub_nilfs2_btree_node *node)
2N/A{
2N/A return node->bn_level;
2N/A}
2N/A
2N/Astatic inline grub_uint64_t *
2N/Agrub_nilfs2_btree_node_dkeys (struct grub_nilfs2_btree_node *node)
2N/A{
2N/A return (node->keys +
2N/A ((node->bn_flags & NILFS_BTREE_NODE_ROOT) ?
2N/A 0 : (NILFS_BTREE_NODE_EXTRA_PAD_SIZE / sizeof (grub_uint64_t))));
2N/A}
2N/A
2N/Astatic inline grub_uint64_t
2N/Agrub_nilfs2_btree_node_get_key (struct grub_nilfs2_btree_node *node,
2N/A int index)
2N/A{
2N/A return grub_le_to_cpu64 (*(grub_nilfs2_btree_node_dkeys (node) + index));
2N/A}
2N/A
2N/Astatic inline int
2N/Agrub_nilfs2_btree_node_lookup (struct grub_nilfs2_btree_node *node,
2N/A grub_uint64_t key, int *indexp)
2N/A{
2N/A grub_uint64_t nkey;
2N/A int index, low, high, s;
2N/A
2N/A low = 0;
2N/A high = grub_le_to_cpu16 (node->bn_nchildren) - 1;
2N/A index = 0;
2N/A s = 0;
2N/A while (low <= high)
2N/A {
2N/A index = (low + high) / 2;
2N/A nkey = grub_nilfs2_btree_node_get_key (node, index);
2N/A if (nkey == key)
2N/A {
2N/A *indexp = index;
2N/A return 1;
2N/A }
2N/A else if (nkey < key)
2N/A {
2N/A low = index + 1;
2N/A s = -1;
2N/A }
2N/A else
2N/A {
2N/A high = index - 1;
2N/A s = 1;
2N/A }
2N/A }
2N/A
2N/A if (node->bn_level > NILFS_BTREE_LEVEL_NODE_MIN)
2N/A {
2N/A if (s > 0 && index > 0)
2N/A index--;
2N/A }
2N/A else if (s < 0)
2N/A index++;
2N/A
2N/A *indexp = index;
2N/A return s == 0;
2N/A}
2N/A
2N/Astatic inline int
2N/Agrub_nilfs2_btree_node_nchildren_max (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_btree_node *node)
2N/A{
2N/A int node_children_max = ((NILFS2_BLOCK_SIZE (data) -
2N/A sizeof (struct grub_nilfs2_btree_node) -
2N/A NILFS_BTREE_NODE_EXTRA_PAD_SIZE) /
2N/A (sizeof (grub_uint64_t) + sizeof (grub_uint64_t)));
2N/A
2N/A return (node->bn_flags & NILFS_BTREE_NODE_ROOT) ? 3 : node_children_max;
2N/A}
2N/A
2N/Astatic inline grub_uint64_t *
2N/Agrub_nilfs2_btree_node_dptrs (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_btree_node *node)
2N/A{
2N/A return (grub_uint64_t *) (grub_nilfs2_btree_node_dkeys (node) +
2N/A grub_nilfs2_btree_node_nchildren_max (data,
2N/A node));
2N/A}
2N/A
2N/Astatic inline grub_uint64_t
2N/Agrub_nilfs2_btree_node_get_ptr (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_btree_node *node,
2N/A int index)
2N/A{
2N/A return
2N/A grub_le_to_cpu64 (*(grub_nilfs2_btree_node_dptrs (data, node) + index));
2N/A}
2N/A
2N/Astatic inline int
2N/Agrub_nilfs2_btree_get_nonroot_node (struct grub_nilfs2_data *data,
2N/A grub_uint64_t ptr, void *block)
2N/A{
2N/A grub_disk_t disk = data->disk;
2N/A unsigned int nilfs2_block_count = (1 << LOG2_NILFS2_BLOCK_SIZE (data));
2N/A
2N/A return grub_disk_read (disk, ptr * nilfs2_block_count, 0,
2N/A NILFS2_BLOCK_SIZE (data), block);
2N/A}
2N/A
2N/Astatic grub_uint64_t
2N/Agrub_nilfs2_btree_lookup (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_inode *inode,
2N/A grub_uint64_t key, int need_translate)
2N/A{
2N/A struct grub_nilfs2_btree_node *node;
2N/A GRUB_PROPERLY_ALIGNED_ARRAY (block, NILFS2_BLOCK_SIZE (data));
2N/A grub_uint64_t ptr;
2N/A int level, found, index;
2N/A
2N/A node = grub_nilfs2_btree_get_root (inode);
2N/A level = grub_nilfs2_btree_get_level (node);
2N/A
2N/A found = grub_nilfs2_btree_node_lookup (node, key, &index);
2N/A ptr = grub_nilfs2_btree_node_get_ptr (data, node, index);
2N/A if (need_translate)
2N/A ptr = grub_nilfs2_dat_translate (data, ptr);
2N/A
2N/A for (level--; level >= NILFS_BTREE_LEVEL_NODE_MIN; level--)
2N/A {
2N/A grub_nilfs2_btree_get_nonroot_node (data, ptr, block);
2N/A if (grub_errno)
2N/A {
2N/A return -1;
2N/A }
2N/A node = (struct grub_nilfs2_btree_node *) block;
2N/A
2N/A if (node->bn_level != level)
2N/A {
2N/A grub_error (GRUB_ERR_BAD_FS, "btree level mismatch\n");
2N/A return -1;
2N/A }
2N/A
2N/A if (!found)
2N/A found = grub_nilfs2_btree_node_lookup (node, key, &index);
2N/A else
2N/A index = 0;
2N/A
2N/A if (index < grub_nilfs2_btree_node_nchildren_max (data, node))
2N/A {
2N/A ptr = grub_nilfs2_btree_node_get_ptr (data, node, index);
2N/A if (need_translate)
2N/A ptr = grub_nilfs2_dat_translate (data, ptr);
2N/A }
2N/A else
2N/A {
2N/A grub_error (GRUB_ERR_BAD_FS, "btree corruption\n");
2N/A return -1;
2N/A }
2N/A }
2N/A
2N/A if (!found)
2N/A return -1;
2N/A
2N/A return ptr;
2N/A}
2N/A
2N/Astatic inline grub_uint64_t
2N/Agrub_nilfs2_direct_lookup (struct grub_nilfs2_inode *inode, grub_uint64_t key)
2N/A{
2N/A return grub_le_to_cpu64 (inode->i_bmap[1 + key]);
2N/A}
2N/A
2N/Astatic inline grub_uint64_t
2N/Agrub_nilfs2_bmap_lookup (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_inode *inode,
2N/A grub_uint64_t key, int need_translate)
2N/A{
2N/A struct grub_nilfs2_btree_node *root = grub_nilfs2_btree_get_root (inode);
2N/A if (root->bn_flags & NILFS_BMAP_LARGE)
2N/A return grub_nilfs2_btree_lookup (data, inode, key, need_translate);
2N/A else
2N/A {
2N/A grub_uint64_t ptr;
2N/A ptr = grub_nilfs2_direct_lookup (inode, key);
2N/A if (need_translate)
2N/A ptr = grub_nilfs2_dat_translate (data, ptr);
2N/A return ptr;
2N/A }
2N/A}
2N/A
2N/Astatic grub_uint64_t
2N/Agrub_nilfs2_dat_translate (struct grub_nilfs2_data *data, grub_uint64_t key)
2N/A{
2N/A struct grub_nilfs2_dat_entry entry;
2N/A grub_disk_t disk = data->disk;
2N/A grub_uint64_t pptr;
2N/A grub_uint64_t blockno, offset;
2N/A unsigned int nilfs2_block_count = (1 << LOG2_NILFS2_BLOCK_SIZE (data));
2N/A
2N/A blockno = grub_nilfs2_palloc_entry_offset_log (data, key,
2N/A LOG_NILFS_DAT_ENTRY_SIZE);
2N/A
2N/A offset = ((key * sizeof (struct grub_nilfs2_dat_entry))
2N/A & ((1 << LOG2_BLOCK_SIZE (data)) - 1));
2N/A
2N/A pptr = grub_nilfs2_bmap_lookup (data, &data->sroot.sr_dat, blockno, 0);
2N/A if (pptr == (grub_uint64_t) - 1)
2N/A {
2N/A grub_error (GRUB_ERR_BAD_FS, "btree lookup failure");
2N/A return -1;
2N/A }
2N/A
2N/A grub_disk_read (disk, pptr * nilfs2_block_count, offset,
2N/A sizeof (struct grub_nilfs2_dat_entry), &entry);
2N/A
2N/A return grub_le_to_cpu64 (entry.de_blocknr);
2N/A}
2N/A
2N/A
2N/Astatic grub_disk_addr_t
2N/Agrub_nilfs2_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
2N/A{
2N/A struct grub_nilfs2_data *data = node->data;
2N/A struct grub_nilfs2_inode *inode = &node->inode;
2N/A grub_uint64_t pptr = -1;
2N/A
2N/A pptr = grub_nilfs2_bmap_lookup (data, inode, fileblock, 1);
2N/A if (pptr == (grub_uint64_t) - 1)
2N/A {
2N/A grub_error (GRUB_ERR_BAD_FS, "btree lookup failure");
2N/A return -1;
2N/A }
2N/A
2N/A return pptr;
2N/A}
2N/A
2N/A/* Read LEN bytes from the file described by DATA starting with byte
2N/A POS. Return the amount of read bytes in READ. */
2N/Astatic grub_ssize_t
2N/Agrub_nilfs2_read_file (grub_fshelp_node_t node,
2N/A void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t
2N/A sector,
2N/A unsigned offset,
2N/A unsigned length),
2N/A grub_off_t pos, grub_size_t len, char *buf)
2N/A{
2N/A return grub_fshelp_read_file (node->data->disk, node, read_hook,
2N/A pos, len, buf, grub_nilfs2_read_block,
2N/A grub_le_to_cpu64 (node->inode.i_size),
2N/A LOG2_NILFS2_BLOCK_SIZE (node->data));
2N/A
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_read_checkpoint (struct grub_nilfs2_data *data,
2N/A grub_uint64_t cpno,
2N/A struct grub_nilfs2_checkpoint *cpp)
2N/A{
2N/A grub_uint64_t blockno;
2N/A grub_uint64_t offset;
2N/A grub_uint64_t pptr;
2N/A grub_disk_t disk = data->disk;
2N/A unsigned int nilfs2_block_count = (1 << LOG2_NILFS2_BLOCK_SIZE (data));
2N/A
2N/A /* Assume sizeof(struct grub_nilfs2_cpfile_header) <
2N/A sizeof(struct grub_nilfs2_checkpoint).
2N/A */
2N/A blockno = grub_divmod64 (cpno, NILFS2_BLOCK_SIZE (data) /
2N/A sizeof (struct grub_nilfs2_checkpoint), &offset);
2N/A
2N/A pptr = grub_nilfs2_bmap_lookup (data, &data->sroot.sr_cpfile, blockno, 1);
2N/A if (pptr == (grub_uint64_t) - 1)
2N/A {
2N/A return grub_error (GRUB_ERR_BAD_FS, "btree lookup failure");
2N/A }
2N/A
2N/A return grub_disk_read (disk, pptr * nilfs2_block_count,
2N/A offset * sizeof (struct grub_nilfs2_checkpoint),
2N/A sizeof (struct grub_nilfs2_checkpoint), cpp);
2N/A}
2N/A
2N/Astatic inline grub_err_t
2N/Agrub_nilfs2_read_last_checkpoint (struct grub_nilfs2_data *data,
2N/A struct grub_nilfs2_checkpoint *cpp)
2N/A{
2N/A return grub_nilfs2_read_checkpoint (data,
2N/A grub_le_to_cpu64 (data->
2N/A sblock.s_last_cno),
2N/A cpp);
2N/A}
2N/A
2N/A/* Read the inode INO for the file described by DATA into INODE. */
2N/Astatic grub_err_t
2N/Agrub_nilfs2_read_inode (struct grub_nilfs2_data *data,
2N/A grub_uint64_t ino, struct grub_nilfs2_inode *inodep)
2N/A{
2N/A grub_uint64_t blockno;
2N/A grub_uint64_t offset;
2N/A grub_uint64_t pptr;
2N/A grub_disk_t disk = data->disk;
2N/A unsigned int nilfs2_block_count = (1 << LOG2_NILFS2_BLOCK_SIZE (data));
2N/A
2N/A blockno = grub_nilfs2_palloc_entry_offset_log (data, ino,
2N/A LOG_INODE_SIZE);
2N/A
2N/A offset = ((sizeof (struct grub_nilfs2_inode) * ino)
2N/A & ((1 << LOG2_BLOCK_SIZE (data)) - 1));
2N/A pptr = grub_nilfs2_bmap_lookup (data, &data->ifile, blockno, 1);
2N/A if (pptr == (grub_uint64_t) - 1)
2N/A {
2N/A return grub_error (GRUB_ERR_BAD_FS, "btree lookup failure");
2N/A }
2N/A
2N/A return grub_disk_read (disk, pptr * nilfs2_block_count, offset,
2N/A sizeof (struct grub_nilfs2_inode), inodep);
2N/A}
2N/A
2N/Astatic int
2N/Agrub_nilfs2_valid_sb (struct grub_nilfs2_super_block *sbp)
2N/A{
2N/A if (grub_le_to_cpu16 (sbp->s_magic) != NILFS2_SUPER_MAGIC)
2N/A return 0;
2N/A
2N/A if (grub_le_to_cpu32 (sbp->s_rev_level) != NILFS_SUPORT_REV)
2N/A return 0;
2N/A
2N/A return 1;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_load_sb (struct grub_nilfs2_data *data)
2N/A{
2N/A grub_disk_t disk = data->disk;
2N/A struct grub_nilfs2_super_block sb2;
2N/A grub_uint64_t partition_size;
2N/A int valid[2];
2N/A int swp = 0;
2N/A grub_err_t err;
2N/A
2N/A /* Read first super block. */
2N/A err = grub_disk_read (disk, NILFS_1ST_SUPER_BLOCK, 0,
2N/A sizeof (struct grub_nilfs2_super_block), &data->sblock);
2N/A if (err)
2N/A return err;
2N/A /* Make sure if 1st super block is valid. */
2N/A valid[0] = grub_nilfs2_valid_sb (&data->sblock);
2N/A
2N/A partition_size = grub_disk_get_size (disk);
2N/A if (partition_size != GRUB_DISK_SIZE_UNKNOWN)
2N/A {
2N/A /* Read second super block. */
2N/A err = grub_disk_read (disk, NILFS_2ND_SUPER_BLOCK (partition_size), 0,
2N/A sizeof (struct grub_nilfs2_super_block), &sb2);
2N/A if (err)
2N/A {
2N/A valid[1] = 0;
2N/A grub_errno = GRUB_ERR_NONE;
2N/A }
2N/A else
2N/A /* Make sure if 2nd super block is valid. */
2N/A valid[1] = grub_nilfs2_valid_sb (&sb2);
2N/A }
2N/A else
2N/A /* 2nd super block may not exist, so it's invalid. */
2N/A valid[1] = 0;
2N/A
2N/A if (!valid[0] && !valid[1])
2N/A return grub_error (GRUB_ERR_BAD_FS, "not a nilfs2 filesystem");
2N/A
2N/A swp = valid[1] && (!valid[0] ||
2N/A grub_le_to_cpu64 (data->sblock.s_last_cno) <
2N/A grub_le_to_cpu64 (sb2.s_last_cno));
2N/A
2N/A /* swap if first super block is invalid or older than second one. */
2N/A if (swp)
2N/A grub_memcpy (&data->sblock, &sb2,
2N/A sizeof (struct grub_nilfs2_super_block));
2N/A
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic struct grub_nilfs2_data *
2N/Agrub_nilfs2_mount (grub_disk_t disk)
2N/A{
2N/A struct grub_nilfs2_data *data;
2N/A struct grub_nilfs2_segment_summary ss;
2N/A struct grub_nilfs2_checkpoint last_checkpoint;
2N/A grub_uint64_t last_pseg;
2N/A grub_uint32_t nblocks;
2N/A unsigned int nilfs2_block_count;
2N/A
2N/A data = grub_malloc (sizeof (struct grub_nilfs2_data));
2N/A if (!data)
2N/A return 0;
2N/A
2N/A data->disk = disk;
2N/A
2N/A /* Read the superblock. */
2N/A grub_nilfs2_load_sb (data);
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A nilfs2_block_count = (1 << LOG2_NILFS2_BLOCK_SIZE (data));
2N/A
2N/A /* Read the last segment summary. */
2N/A last_pseg = grub_le_to_cpu64 (data->sblock.s_last_pseg);
2N/A grub_disk_read (disk, last_pseg * nilfs2_block_count, 0,
2N/A sizeof (struct grub_nilfs2_segment_summary), &ss);
2N/A
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A /* Read the super root block. */
2N/A nblocks = grub_le_to_cpu32 (ss.ss_nblocks);
2N/A grub_disk_read (disk, (last_pseg + (nblocks - 1)) * nilfs2_block_count, 0,
2N/A sizeof (struct grub_nilfs2_super_root), &data->sroot);
2N/A
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A grub_nilfs2_read_last_checkpoint (data, &last_checkpoint);
2N/A
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A grub_memcpy (&data->ifile, &last_checkpoint.cp_ifile_inode,
2N/A sizeof (struct grub_nilfs2_inode));
2N/A
2N/A data->diropen.data = data;
2N/A data->diropen.ino = 2;
2N/A data->diropen.inode_read = 1;
2N/A data->inode = &data->diropen.inode;
2N/A
2N/A grub_nilfs2_read_inode (data, 2, data->inode);
2N/A
2N/A return data;
2N/A
2N/Afail:
2N/A if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
2N/A grub_error (GRUB_ERR_BAD_FS, "not a nilfs2 filesystem");
2N/A
2N/A grub_free (data);
2N/A return 0;
2N/A}
2N/A
2N/Astatic char *
2N/Agrub_nilfs2_read_symlink (grub_fshelp_node_t node)
2N/A{
2N/A char *symlink;
2N/A struct grub_fshelp_node *diro = node;
2N/A
2N/A if (!diro->inode_read)
2N/A {
2N/A grub_nilfs2_read_inode (diro->data, diro->ino, &diro->inode);
2N/A if (grub_errno)
2N/A return 0;
2N/A }
2N/A
2N/A symlink = grub_malloc (grub_le_to_cpu64 (diro->inode.i_size) + 1);
2N/A if (!symlink)
2N/A return 0;
2N/A
2N/A grub_nilfs2_read_file (diro, 0, 0,
2N/A grub_le_to_cpu64 (diro->inode.i_size), symlink);
2N/A if (grub_errno)
2N/A {
2N/A grub_free (symlink);
2N/A return 0;
2N/A }
2N/A
2N/A symlink[grub_le_to_cpu64 (diro->inode.i_size)] = '\0';
2N/A return symlink;
2N/A}
2N/A
2N/Astatic int
2N/Agrub_nilfs2_iterate_dir (grub_fshelp_node_t dir,
2N/A int NESTED_FUNC_ATTR
2N/A (*hook) (const char *filename,
2N/A enum grub_fshelp_filetype filetype,
2N/A grub_fshelp_node_t node))
2N/A{
2N/A grub_off_t fpos = 0;
2N/A struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
2N/A
2N/A if (!diro->inode_read)
2N/A {
2N/A grub_nilfs2_read_inode (diro->data, diro->ino, &diro->inode);
2N/A if (grub_errno)
2N/A return 0;
2N/A }
2N/A
2N/A /* Iterate files. */
2N/A while (fpos < grub_le_to_cpu64 (diro->inode.i_size))
2N/A {
2N/A struct grub_nilfs2_dir_entry dirent;
2N/A
2N/A grub_nilfs2_read_file (diro, 0, fpos,
2N/A sizeof (struct grub_nilfs2_dir_entry),
2N/A (char *) &dirent);
2N/A if (grub_errno)
2N/A return 0;
2N/A
2N/A if (dirent.rec_len == 0)
2N/A return 0;
2N/A
2N/A if (dirent.name_len != 0)
2N/A {
2N/A char filename[dirent.name_len + 1];
2N/A struct grub_fshelp_node *fdiro;
2N/A enum grub_fshelp_filetype type = GRUB_FSHELP_UNKNOWN;
2N/A
2N/A grub_nilfs2_read_file (diro, 0,
2N/A fpos + sizeof (struct grub_nilfs2_dir_entry),
2N/A dirent.name_len, filename);
2N/A if (grub_errno)
2N/A return 0;
2N/A
2N/A fdiro = grub_malloc (sizeof (struct grub_fshelp_node));
2N/A if (!fdiro)
2N/A return 0;
2N/A
2N/A fdiro->data = diro->data;
2N/A fdiro->ino = grub_le_to_cpu64 (dirent.inode);
2N/A
2N/A filename[dirent.name_len] = '\0';
2N/A
2N/A if (dirent.file_type != NILFS_FT_UNKNOWN)
2N/A {
2N/A fdiro->inode_read = 0;
2N/A
2N/A if (dirent.file_type == NILFS_FT_DIR)
2N/A type = GRUB_FSHELP_DIR;
2N/A else if (dirent.file_type == NILFS_FT_SYMLINK)
2N/A type = GRUB_FSHELP_SYMLINK;
2N/A else if (dirent.file_type == NILFS_FT_REG_FILE)
2N/A type = GRUB_FSHELP_REG;
2N/A }
2N/A else
2N/A {
2N/A /* The filetype can not be read from the dirent, read
2N/A the inode to get more information. */
2N/A grub_nilfs2_read_inode (diro->data,
2N/A grub_le_to_cpu64 (dirent.inode),
2N/A &fdiro->inode);
2N/A if (grub_errno)
2N/A {
2N/A grub_free (fdiro);
2N/A return 0;
2N/A }
2N/A
2N/A fdiro->inode_read = 1;
2N/A
2N/A if ((grub_le_to_cpu16 (fdiro->inode.i_mode)
2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
2N/A type = GRUB_FSHELP_DIR;
2N/A else if ((grub_le_to_cpu16 (fdiro->inode.i_mode)
2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)
2N/A type = GRUB_FSHELP_SYMLINK;
2N/A else if ((grub_le_to_cpu16 (fdiro->inode.i_mode)
2N/A & FILETYPE_INO_MASK) == FILETYPE_INO_REG)
2N/A type = GRUB_FSHELP_REG;
2N/A }
2N/A
2N/A if (hook (filename, type, fdiro))
2N/A return 1;
2N/A }
2N/A
2N/A fpos += grub_le_to_cpu16 (dirent.rec_len);
2N/A }
2N/A
2N/A return 0;
2N/A}
2N/A
2N/A/* Open a file named NAME and initialize FILE. */
2N/Astatic grub_err_t
2N/Agrub_nilfs2_open (struct grub_file *file, const char *name)
2N/A{
2N/A struct grub_nilfs2_data *data = NULL;
2N/A struct grub_fshelp_node *fdiro = 0;
2N/A
2N/A grub_dl_ref (my_mod);
2N/A
2N/A data = grub_nilfs2_mount (file->device->disk);
2N/A if (!data)
2N/A goto fail;
2N/A
2N/A grub_fshelp_find_file (name, &data->diropen, &fdiro,
2N/A grub_nilfs2_iterate_dir, grub_nilfs2_read_symlink,
2N/A GRUB_FSHELP_REG);
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A if (!fdiro->inode_read)
2N/A {
2N/A grub_nilfs2_read_inode (data, fdiro->ino, &fdiro->inode);
2N/A if (grub_errno)
2N/A goto fail;
2N/A }
2N/A
2N/A grub_memcpy (data->inode, &fdiro->inode, sizeof (struct grub_nilfs2_inode));
2N/A grub_free (fdiro);
2N/A
2N/A file->size = grub_le_to_cpu64 (data->inode->i_size);
2N/A file->data = data;
2N/A file->offset = 0;
2N/A
2N/A return 0;
2N/A
2N/Afail:
2N/A if (fdiro != &data->diropen)
2N/A grub_free (fdiro);
2N/A grub_free (data);
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_close (grub_file_t file)
2N/A{
2N/A grub_free (file->data);
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/A/* Read LEN bytes data from FILE into BUF. */
2N/Astatic grub_ssize_t
2N/Agrub_nilfs2_read (grub_file_t file, char *buf, grub_size_t len)
2N/A{
2N/A struct grub_nilfs2_data *data = (struct grub_nilfs2_data *) file->data;
2N/A
2N/A return grub_nilfs2_read_file (&data->diropen, file->read_hook,
2N/A file->offset, len, buf);
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_dir (grub_device_t device, const char *path,
2N/A int (*hook) (const char *filename,
2N/A const struct grub_dirhook_info * info))
2N/A{
2N/A struct grub_nilfs2_data *data = 0;
2N/A struct grub_fshelp_node *fdiro = 0;
2N/A
2N/A auto int NESTED_FUNC_ATTR iterate (const char *filename,
2N/A enum grub_fshelp_filetype filetype,
2N/A grub_fshelp_node_t node);
2N/A
2N/A int NESTED_FUNC_ATTR iterate (const char *filename,
2N/A enum grub_fshelp_filetype filetype,
2N/A grub_fshelp_node_t node)
2N/A {
2N/A struct grub_dirhook_info info;
2N/A grub_memset (&info, 0, sizeof (info));
2N/A if (!node->inode_read)
2N/A {
2N/A grub_nilfs2_read_inode (data, node->ino, &node->inode);
2N/A if (!grub_errno)
2N/A node->inode_read = 1;
2N/A grub_errno = GRUB_ERR_NONE;
2N/A }
2N/A if (node->inode_read)
2N/A {
2N/A info.mtimeset = 1;
2N/A info.mtime = grub_le_to_cpu64 (node->inode.i_mtime);
2N/A }
2N/A
2N/A info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
2N/A grub_free (node);
2N/A return hook (filename, &info);
2N/A }
2N/A
2N/A grub_dl_ref (my_mod);
2N/A
2N/A data = grub_nilfs2_mount (device->disk);
2N/A if (!data)
2N/A goto fail;
2N/A
2N/A grub_fshelp_find_file (path, &data->diropen, &fdiro,
2N/A grub_nilfs2_iterate_dir, grub_nilfs2_read_symlink,
2N/A GRUB_FSHELP_DIR);
2N/A if (grub_errno)
2N/A goto fail;
2N/A
2N/A grub_nilfs2_iterate_dir (fdiro, iterate);
2N/A
2N/Afail:
2N/A if (fdiro != &data->diropen)
2N/A grub_free (fdiro);
2N/A grub_free (data);
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_label (grub_device_t device, char **label)
2N/A{
2N/A struct grub_nilfs2_data *data;
2N/A grub_disk_t disk = device->disk;
2N/A
2N/A grub_dl_ref (my_mod);
2N/A
2N/A data = grub_nilfs2_mount (disk);
2N/A if (data)
2N/A *label = grub_strndup (data->sblock.s_volume_name, 14);
2N/A else
2N/A *label = NULL;
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A grub_free (data);
2N/A
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Agrub_nilfs2_uuid (grub_device_t device, char **uuid)
2N/A{
2N/A struct grub_nilfs2_data *data;
2N/A grub_disk_t disk = device->disk;
2N/A
2N/A grub_dl_ref (my_mod);
2N/A
2N/A data = grub_nilfs2_mount (disk);
2N/A if (data)
2N/A {
2N/A *uuid =
2N/A grub_xasprintf
2N/A ("%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
2N/A data->sblock.s_uuid[0], data->sblock.s_uuid[1],
2N/A data->sblock.s_uuid[2], data->sblock.s_uuid[3],
2N/A data->sblock.s_uuid[4], data->sblock.s_uuid[5],
2N/A data->sblock.s_uuid[6], data->sblock.s_uuid[7],
2N/A data->sblock.s_uuid[8], data->sblock.s_uuid[9],
2N/A data->sblock.s_uuid[10], data->sblock.s_uuid[11],
2N/A data->sblock.s_uuid[12], data->sblock.s_uuid[13],
2N/A data->sblock.s_uuid[14], data->sblock.s_uuid[15]);
2N/A }
2N/A else
2N/A *uuid = NULL;
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A grub_free (data);
2N/A
2N/A return grub_errno;
2N/A}
2N/A
2N/A/* Get mtime. */
2N/Astatic grub_err_t
2N/Agrub_nilfs2_mtime (grub_device_t device, grub_int32_t * tm)
2N/A{
2N/A struct grub_nilfs2_data *data;
2N/A grub_disk_t disk = device->disk;
2N/A
2N/A grub_dl_ref (my_mod);
2N/A
2N/A data = grub_nilfs2_mount (disk);
2N/A if (!data)
2N/A *tm = 0;
2N/A else
2N/A *tm = (grub_int32_t) grub_le_to_cpu64 (data->sblock.s_wtime);
2N/A
2N/A grub_dl_unref (my_mod);
2N/A
2N/A grub_free (data);
2N/A
2N/A return grub_errno;
2N/A}
2N/A
2N/A
2N/A
2N/Astatic struct grub_fs grub_nilfs2_fs = {
2N/A .name = "nilfs2",
2N/A .dir = grub_nilfs2_dir,
2N/A .open = grub_nilfs2_open,
2N/A .read = grub_nilfs2_read,
2N/A .close = grub_nilfs2_close,
2N/A .label = grub_nilfs2_label,
2N/A .uuid = grub_nilfs2_uuid,
2N/A .mtime = grub_nilfs2_mtime,
2N/A#ifdef GRUB_UTIL
2N/A .reserved_first_sector = 1,
2N/A#endif
2N/A .next = 0
2N/A};
2N/A
2N/AGRUB_MOD_INIT (nilfs2)
2N/A{
2N/A COMPILE_TIME_ASSERT ((1 << LOG_NILFS_DAT_ENTRY_SIZE)
2N/A == sizeof (struct
2N/A grub_nilfs2_dat_entry));
2N/A COMPILE_TIME_ASSERT (1 << LOG_INODE_SIZE
2N/A == sizeof (struct grub_nilfs2_inode));
2N/A grub_fs_register (&grub_nilfs2_fs);
2N/A my_mod = mod;
2N/A}
2N/A
2N/AGRUB_MOD_FINI (nilfs2)
2N/A{
2N/A grub_fs_unregister (&grub_nilfs2_fs);
2N/A}