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/* ext2.c - Second Extended filesystem */
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2007,2008,2009 Free Software Foundation, Inc.
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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/* Magic value used to identify an ext2 filesystem. */
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#define EXT2_MAGIC 0xEF53
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/* Amount of indirect blocks in an inode. */
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#define INDIRECT_BLOCKS 12
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/* Maximum length of a pathname. */
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#define EXT2_PATH_MAX 4096
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/* Maximum nesting of symlinks, used to prevent a loop. */
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#define EXT2_MAX_SYMLINKCNT 8
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/* The good old revision and the default inode size. */
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#define EXT2_GOOD_OLD_REVISION 0
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#define EXT2_GOOD_OLD_INODE_SIZE 128
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/* Filetype used in directory entry. */
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#define FILETYPE_UNKNOWN 0
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#define FILETYPE_REG 1
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#define FILETYPE_DIRECTORY 2
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#define FILETYPE_SYMLINK 7
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/* Filetype information as used in inodes. */
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#define FILETYPE_INO_MASK 0170000
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#define FILETYPE_INO_REG 0100000
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#define FILETYPE_INO_DIRECTORY 0040000
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#define FILETYPE_INO_SYMLINK 0120000
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#include <grub/file.h>
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#include <grub/misc.h>
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#include <grub/disk.h>
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#include <grub/types.h>
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#include <grub/fshelp.h>
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/* Log2 size of ext2 block in 512 blocks. */
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#define LOG2_EXT2_BLOCK_SIZE(data) \
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(grub_le_to_cpu32 (data->sblock.log2_block_size) + 1)
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/* Log2 size of ext2 block in bytes. */
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#define LOG2_BLOCK_SIZE(data) \
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(grub_le_to_cpu32 (data->sblock.log2_block_size) + 10)
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/* The size of an ext2 block in bytes. */
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#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE (data))
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/* The revision level. */
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#define EXT2_REVISION(data) grub_le_to_cpu32 (data->sblock.revision_level)
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#define EXT2_INODE_SIZE(data) \
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(EXT2_REVISION (data) == EXT2_GOOD_OLD_REVISION \
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? EXT2_GOOD_OLD_INODE_SIZE \
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: grub_le_to_cpu16 (data->sblock.inode_size))
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/* Superblock filesystem feature flags (RW compatible)
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* A filesystem with any of these enabled can be read and written by a driver
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* that does not understand them without causing metadata/data corruption. */
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#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
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#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
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#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
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#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
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#define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010
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#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
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/* Superblock filesystem feature flags (RO compatible)
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* A filesystem with any of these enabled can be safely read by a driver that
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* does not understand them, but should not be written to, usually because
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* additional metadata is required. */
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#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
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#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
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#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
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#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
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#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
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#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
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/* Superblock filesystem feature flags (back-incompatible)
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* A filesystem with any of these enabled should not be attempted to be read
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* by a driver that does not understand them, since they usually indicate
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* metadata format changes that might confuse the reader. */
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#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
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#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
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#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
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#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Volume is journal device */
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#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
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#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* Extents used */
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#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
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#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
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/* The set of back-incompatible features this driver DOES support. Add (OR)
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* flags here as the related features are implemented into the driver. */
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#define EXT2_DRIVER_SUPPORTED_INCOMPAT ( EXT2_FEATURE_INCOMPAT_FILETYPE \
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| EXT4_FEATURE_INCOMPAT_EXTENTS \
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| EXT4_FEATURE_INCOMPAT_FLEX_BG )
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/* List of rationales for the ignored "incompatible" features:
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* needs_recovery: Not really back-incompatible - was added as such to forbid
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* ext2 drivers from mounting an ext3 volume with a dirty
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* journal because they will ignore the journal, but the next
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* ext3 driver to mount the volume will find the journal and
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* replay it, potentially corrupting the metadata written by
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* the ext2 drivers. Safe to ignore for this RO driver. */
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#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER )
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#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U
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#define EXT3_JOURNAL_DESCRIPTOR_BLOCK 1
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#define EXT3_JOURNAL_COMMIT_BLOCK 2
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#define EXT3_JOURNAL_SUPERBLOCK_V1 3
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#define EXT3_JOURNAL_SUPERBLOCK_V2 4
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#define EXT3_JOURNAL_REVOKE_BLOCK 5
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#define EXT3_JOURNAL_FLAG_ESCAPE 1
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#define EXT3_JOURNAL_FLAG_SAME_UUID 2
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#define EXT3_JOURNAL_FLAG_DELETED 4
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#define EXT3_JOURNAL_FLAG_LAST_TAG 8
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#define EXT4_EXTENTS_FLAG 0x80000
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/* The ext2 superblock. */
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struct grub_ext2_sblock
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grub_uint32_t total_inodes;
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grub_uint32_t total_blocks;
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grub_uint32_t reserved_blocks;
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grub_uint32_t free_blocks;
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grub_uint32_t free_inodes;
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grub_uint32_t first_data_block;
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grub_uint32_t log2_block_size;
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grub_uint32_t log2_fragment_size;
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grub_uint32_t blocks_per_group;
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grub_uint32_t fragments_per_group;
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grub_uint32_t inodes_per_group;
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grub_uint16_t mnt_count;
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grub_uint16_t max_mnt_count;
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grub_uint16_t fs_state;
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grub_uint16_t error_handling;
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grub_uint16_t minor_revision_level;
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grub_uint32_t lastcheck;
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grub_uint32_t checkinterval;
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grub_uint32_t creator_os;
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grub_uint32_t revision_level;
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grub_uint16_t uid_reserved;
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grub_uint16_t gid_reserved;
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grub_uint32_t first_inode;
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grub_uint16_t inode_size;
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grub_uint16_t block_group_number;
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grub_uint32_t feature_compatibility;
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grub_uint32_t feature_incompat;
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grub_uint32_t feature_ro_compat;
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grub_uint16_t uuid[8];
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char volume_name[16];
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char last_mounted_on[64];
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grub_uint32_t compression_info;
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grub_uint8_t prealloc_blocks;
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grub_uint8_t prealloc_dir_blocks;
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grub_uint16_t reserved_gdt_blocks;
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grub_uint8_t journal_uuid[16];
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grub_uint32_t journal_inum;
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grub_uint32_t journal_dev;
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grub_uint32_t last_orphan;
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grub_uint32_t hash_seed[4];
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grub_uint8_t def_hash_version;
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grub_uint8_t jnl_backup_type;
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grub_uint16_t reserved_word_pad;
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grub_uint32_t default_mount_opts;
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grub_uint32_t first_meta_bg;
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grub_uint32_t mkfs_time;
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grub_uint32_t jnl_blocks[17];
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/* The ext2 blockgroup. */
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struct grub_ext2_block_group
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grub_uint32_t block_id;
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grub_uint32_t inode_id;
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grub_uint32_t inode_table_id;
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grub_uint16_t free_blocks;
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grub_uint16_t free_inodes;
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grub_uint16_t used_dirs;
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grub_uint32_t reserved[3];
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/* The ext2 inode. */
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struct grub_ext2_inode
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grub_uint16_t nlinks;
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grub_uint32_t blockcnt; /* Blocks of 512 bytes!! */
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grub_uint32_t dir_blocks[INDIRECT_BLOCKS];
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grub_uint32_t indir_block;
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grub_uint32_t double_indir_block;
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grub_uint32_t triple_indir_block;
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grub_uint32_t version;
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grub_uint32_t dir_acl;
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grub_uint32_t fragment_addr;
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grub_uint32_t osd2[3];
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/* The header of an ext2 directory entry. */
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grub_uint16_t direntlen;
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grub_uint8_t namelen;
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grub_uint8_t filetype;
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struct grub_ext3_journal_header
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grub_uint32_t block_type;
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grub_uint32_t sequence;
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struct grub_ext3_journal_revoke_header
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struct grub_ext3_journal_header header;
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grub_uint32_t data[0];
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struct grub_ext3_journal_block_tag
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struct grub_ext3_journal_sblock
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struct grub_ext3_journal_header header;
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grub_uint32_t block_size;
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grub_uint32_t maxlen;
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grub_uint32_t sequence;
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#define EXT4_EXT_MAGIC 0xf30a
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struct grub_ext4_extent_header
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grub_uint16_t entries;
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grub_uint32_t generation;
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struct grub_ext4_extent
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grub_uint16_t start_hi;
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struct grub_ext4_extent_idx
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grub_uint16_t leaf_hi;
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grub_uint16_t unused;
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struct grub_fshelp_node
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struct grub_ext2_data *data;
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struct grub_ext2_inode inode;
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/* Information about a "mounted" ext2 filesystem. */
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struct grub_ext2_data
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struct grub_ext2_sblock sblock;
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struct grub_ext2_inode *inode;
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struct grub_fshelp_node diropen;
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static grub_dl_t my_mod;
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/* Read into BLKGRP the blockgroup descriptor of blockgroup GROUP of
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the mounted filesystem DATA. */
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inline static grub_err_t
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grub_ext2_blockgroup (struct grub_ext2_data *data, int group,
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struct grub_ext2_block_group *blkgrp)
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return grub_disk_read (data->disk,
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((grub_le_to_cpu32 (data->sblock.first_data_block) + 1)
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<< LOG2_EXT2_BLOCK_SIZE (data)),
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group * sizeof (struct grub_ext2_block_group),
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sizeof (struct grub_ext2_block_group), blkgrp);
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static struct grub_ext4_extent_header *
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grub_ext4_find_leaf (struct grub_ext2_data *data, char *buf,
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struct grub_ext4_extent_header *ext_block,
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grub_uint32_t fileblock)
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struct grub_ext4_extent_idx *index;
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grub_disk_addr_t block;
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index = (struct grub_ext4_extent_idx *) (ext_block + 1);
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if (grub_le_to_cpu16(ext_block->magic) != EXT4_EXT_MAGIC)
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if (ext_block->depth == 0)
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for (i = 0; i < grub_le_to_cpu16 (ext_block->entries); i++)
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if (fileblock < grub_le_to_cpu32(index[i].block))
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block = grub_le_to_cpu16 (index[i].leaf_hi);
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block = (block << 32) + grub_le_to_cpu32 (index[i].leaf);
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if (grub_disk_read (data->disk,
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block << LOG2_EXT2_BLOCK_SIZE (data),
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0, EXT2_BLOCK_SIZE(data), buf))
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ext_block = (struct grub_ext4_extent_header *) buf;
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static grub_disk_addr_t
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grub_ext2_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
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struct grub_ext2_data *data = node->data;
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struct grub_ext2_inode *inode = &node->inode;
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unsigned int blksz = EXT2_BLOCK_SIZE (data);
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int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data);
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if (grub_le_to_cpu32(inode->flags) & EXT4_EXTENTS_FLAG)
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char buf[EXT2_BLOCK_SIZE(data)];
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struct grub_ext4_extent_header *leaf;
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struct grub_ext4_extent *ext;
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leaf = grub_ext4_find_leaf (data, buf,
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(struct grub_ext4_extent_header *) inode->blocks.dir_blocks,
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grub_error (GRUB_ERR_BAD_FS, "invalid extent");
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ext = (struct grub_ext4_extent *) (leaf + 1);
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for (i = 0; i < grub_le_to_cpu16 (leaf->entries); i++)
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if (fileblock < grub_le_to_cpu32 (ext[i].block))
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fileblock -= grub_le_to_cpu32 (ext[i].block);
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if (fileblock >= grub_le_to_cpu16 (ext[i].len))
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grub_disk_addr_t start;
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start = grub_le_to_cpu16 (ext[i].start_hi);
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start = (start << 32) + grub_le_to_cpu32 (ext[i].start);
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return fileblock + start;
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grub_error (GRUB_ERR_BAD_FS, "something wrong with extent");
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if (fileblock < INDIRECT_BLOCKS)
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blknr = grub_le_to_cpu32 (inode->blocks.dir_blocks[fileblock]);
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else if (fileblock < INDIRECT_BLOCKS + blksz / 4)
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grub_uint32_t indir[blksz / 4];
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if (grub_disk_read (data->disk,
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grub_le_to_cpu32 (inode->blocks.indir_block)
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blknr = grub_le_to_cpu32 (indir[fileblock - INDIRECT_BLOCKS]);
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/* Double indirect. */
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else if (fileblock < INDIRECT_BLOCKS + blksz / 4 * (blksz / 4 + 1))
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unsigned int perblock = blksz / 4;
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unsigned int rblock = fileblock - (INDIRECT_BLOCKS
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grub_uint32_t indir[blksz / 4];
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if (grub_disk_read (data->disk,
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grub_le_to_cpu32 (inode->blocks.double_indir_block)
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if (grub_disk_read (data->disk,
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grub_le_to_cpu32 (indir[rblock / perblock])
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blknr = grub_le_to_cpu32 (indir[rblock % perblock]);
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/* triple indirect. */
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grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"ext2fs doesn't support triple indirect blocks");
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/* Read LEN bytes from the file described by DATA starting with byte
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POS. Return the amount of read bytes in READ. */
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grub_ext2_read_file (grub_fshelp_node_t node,
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void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
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unsigned offset, unsigned length),
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int pos, grub_size_t len, char *buf)
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return grub_fshelp_read_file (node->data->disk, node, read_hook,
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pos, len, buf, grub_ext2_read_block,
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LOG2_EXT2_BLOCK_SIZE (node->data));
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/* Read the inode INO for the file described by DATA into INODE. */
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grub_ext2_read_inode (struct grub_ext2_data *data,
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int ino, struct grub_ext2_inode *inode)
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struct grub_ext2_block_group blkgrp;
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struct grub_ext2_sblock *sblock = &data->sblock;
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int inodes_per_block;
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/* It is easier to calculate if the first inode is 0. */
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grub_ext2_blockgroup (data,
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ino / grub_le_to_cpu32 (sblock->inodes_per_group),
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inodes_per_block = EXT2_BLOCK_SIZE (data) / EXT2_INODE_SIZE (data);
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blkno = (ino % grub_le_to_cpu32 (sblock->inodes_per_group))
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blkoff = (ino % grub_le_to_cpu32 (sblock->inodes_per_group))
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/* Read the inode. */
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if (grub_disk_read (data->disk,
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((grub_le_to_cpu32 (blkgrp.inode_table_id) + blkno)
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<< LOG2_EXT2_BLOCK_SIZE (data)),
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EXT2_INODE_SIZE (data) * blkoff,
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sizeof (struct grub_ext2_inode), inode))
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static struct grub_ext2_data *
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grub_ext2_mount (grub_disk_t disk)
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struct grub_ext2_data *data;
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data = grub_malloc (sizeof (struct grub_ext2_data));
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/* Read the superblock. */
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grub_disk_read (disk, 1 * 2, 0, sizeof (struct grub_ext2_sblock),
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/* Make sure this is an ext2 filesystem. */
548
if (grub_le_to_cpu16 (data->sblock.magic) != EXT2_MAGIC)
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grub_error (GRUB_ERR_BAD_FS, "not an ext2 filesystem");
554
/* Check the FS doesn't have feature bits enabled that we don't support. */
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if (grub_le_to_cpu32 (data->sblock.feature_incompat)
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& ~(EXT2_DRIVER_SUPPORTED_INCOMPAT | EXT2_DRIVER_IGNORED_INCOMPAT))
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grub_error (GRUB_ERR_BAD_FS, "filesystem has unsupported incompatible features");
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data->diropen.data = data;
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data->diropen.ino = 2;
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data->diropen.inode_read = 1;
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data->inode = &data->diropen.inode;
571
grub_ext2_read_inode (data, 2, data->inode);
578
if (grub_errno == GRUB_ERR_OUT_OF_RANGE)
579
grub_error (GRUB_ERR_BAD_FS, "not an ext2 filesystem");
586
grub_ext2_read_symlink (grub_fshelp_node_t node)
589
struct grub_fshelp_node *diro = node;
591
if (! diro->inode_read)
593
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode);
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symlink = grub_malloc (grub_le_to_cpu32 (diro->inode.size) + 1);
602
/* If the filesize of the symlink is bigger than
603
60 the symlink is stored in a separate block,
604
otherwise it is stored in the inode. */
605
if (grub_le_to_cpu32 (diro->inode.size) <= 60)
606
grub_strncpy (symlink,
608
grub_le_to_cpu32 (diro->inode.size));
611
grub_ext2_read_file (diro, 0, 0,
612
grub_le_to_cpu32 (diro->inode.size),
621
symlink[grub_le_to_cpu32 (diro->inode.size)] = '\0';
626
grub_ext2_iterate_dir (grub_fshelp_node_t dir,
628
(*hook) (const char *filename,
629
enum grub_fshelp_filetype filetype,
630
grub_fshelp_node_t node))
632
unsigned int fpos = 0;
633
struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
635
if (! diro->inode_read)
637
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode);
642
/* Search the file. */
643
while (fpos < grub_le_to_cpu32 (diro->inode.size))
645
struct ext2_dirent dirent;
647
grub_ext2_read_file (diro, 0, fpos, sizeof (struct ext2_dirent),
652
if (dirent.direntlen == 0)
655
if (dirent.namelen != 0)
657
char filename[dirent.namelen + 1];
658
struct grub_fshelp_node *fdiro;
659
enum grub_fshelp_filetype type = GRUB_FSHELP_UNKNOWN;
661
grub_ext2_read_file (diro, 0, fpos + sizeof (struct ext2_dirent),
662
dirent.namelen, filename);
666
fdiro = grub_malloc (sizeof (struct grub_fshelp_node));
670
fdiro->data = diro->data;
671
fdiro->ino = grub_le_to_cpu32 (dirent.inode);
673
filename[dirent.namelen] = '\0';
675
if (dirent.filetype != FILETYPE_UNKNOWN)
677
fdiro->inode_read = 0;
679
if (dirent.filetype == FILETYPE_DIRECTORY)
680
type = GRUB_FSHELP_DIR;
681
else if (dirent.filetype == FILETYPE_SYMLINK)
682
type = GRUB_FSHELP_SYMLINK;
683
else if (dirent.filetype == FILETYPE_REG)
684
type = GRUB_FSHELP_REG;
688
/* The filetype can not be read from the dirent, read
689
the inode to get more information. */
690
grub_ext2_read_inode (diro->data,
691
grub_le_to_cpu32 (dirent.inode),
699
fdiro->inode_read = 1;
701
if ((grub_le_to_cpu16 (fdiro->inode.mode)
702
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
703
type = GRUB_FSHELP_DIR;
704
else if ((grub_le_to_cpu16 (fdiro->inode.mode)
705
& FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)
706
type = GRUB_FSHELP_SYMLINK;
707
else if ((grub_le_to_cpu16 (fdiro->inode.mode)
708
& FILETYPE_INO_MASK) == FILETYPE_INO_REG)
709
type = GRUB_FSHELP_REG;
712
if (hook (filename, type, fdiro))
716
fpos += grub_le_to_cpu16 (dirent.direntlen);
722
/* Open a file named NAME and initialize FILE. */
724
grub_ext2_open (struct grub_file *file, const char *name)
726
struct grub_ext2_data *data;
727
struct grub_fshelp_node *fdiro = 0;
729
grub_dl_ref (my_mod);
731
data = grub_ext2_mount (file->device->disk);
735
grub_fshelp_find_file (name, &data->diropen, &fdiro, grub_ext2_iterate_dir,
736
grub_ext2_read_symlink, GRUB_FSHELP_REG);
740
if (! fdiro->inode_read)
742
grub_ext2_read_inode (data, fdiro->ino, &fdiro->inode);
747
grub_memcpy (data->inode, &fdiro->inode, sizeof (struct grub_ext2_inode));
750
file->size = grub_le_to_cpu32 (data->inode->size);
757
if (fdiro != &data->diropen)
761
grub_dl_unref (my_mod);
767
grub_ext2_close (grub_file_t file)
769
grub_free (file->data);
771
grub_dl_unref (my_mod);
773
return GRUB_ERR_NONE;
776
/* Read LEN bytes data from FILE into BUF. */
778
grub_ext2_read (grub_file_t file, char *buf, grub_size_t len)
780
struct grub_ext2_data *data = (struct grub_ext2_data *) file->data;
782
return grub_ext2_read_file (&data->diropen, file->read_hook,
783
file->offset, len, buf);
788
grub_ext2_dir (grub_device_t device, const char *path,
789
int (*hook) (const char *filename,
790
const struct grub_dirhook_info *info))
792
struct grub_ext2_data *data = 0;
793
struct grub_fshelp_node *fdiro = 0;
795
auto int NESTED_FUNC_ATTR iterate (const char *filename,
796
enum grub_fshelp_filetype filetype,
797
grub_fshelp_node_t node);
799
int NESTED_FUNC_ATTR iterate (const char *filename,
800
enum grub_fshelp_filetype filetype,
801
grub_fshelp_node_t node)
803
struct grub_dirhook_info info;
804
grub_memset (&info, 0, sizeof (info));
805
if (! node->inode_read)
807
grub_ext2_read_inode (data, node->ino, &node->inode);
809
node->inode_read = 1;
810
grub_errno = GRUB_ERR_NONE;
812
if (node->inode_read)
815
info.mtime = grub_le_to_cpu32 (node->inode.mtime);
818
info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR);
820
return hook (filename, &info);
823
grub_dl_ref (my_mod);
825
data = grub_ext2_mount (device->disk);
829
grub_fshelp_find_file (path, &data->diropen, &fdiro, grub_ext2_iterate_dir,
830
grub_ext2_read_symlink, GRUB_FSHELP_DIR);
834
grub_ext2_iterate_dir (fdiro, iterate);
837
if (fdiro != &data->diropen)
841
grub_dl_unref (my_mod);
847
grub_ext2_label (grub_device_t device, char **label)
849
struct grub_ext2_data *data;
850
grub_disk_t disk = device->disk;
852
grub_dl_ref (my_mod);
854
data = grub_ext2_mount (disk);
856
*label = grub_strndup (data->sblock.volume_name, 14);
860
grub_dl_unref (my_mod);
868
grub_ext2_uuid (grub_device_t device, char **uuid)
870
struct grub_ext2_data *data;
871
grub_disk_t disk = device->disk;
873
grub_dl_ref (my_mod);
875
data = grub_ext2_mount (disk);
878
*uuid = grub_xasprintf ("%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
879
grub_be_to_cpu16 (data->sblock.uuid[0]),
880
grub_be_to_cpu16 (data->sblock.uuid[1]),
881
grub_be_to_cpu16 (data->sblock.uuid[2]),
882
grub_be_to_cpu16 (data->sblock.uuid[3]),
883
grub_be_to_cpu16 (data->sblock.uuid[4]),
884
grub_be_to_cpu16 (data->sblock.uuid[5]),
885
grub_be_to_cpu16 (data->sblock.uuid[6]),
886
grub_be_to_cpu16 (data->sblock.uuid[7]));
891
grub_dl_unref (my_mod);
900
grub_ext2_mtime (grub_device_t device, grub_int32_t *tm)
902
struct grub_ext2_data *data;
903
grub_disk_t disk = device->disk;
905
grub_dl_ref (my_mod);
907
data = grub_ext2_mount (disk);
911
*tm = grub_le_to_cpu32 (data->sblock.utime);
913
grub_dl_unref (my_mod);
923
static struct grub_fs grub_ext2_fs =
926
.dir = grub_ext2_dir,
927
.open = grub_ext2_open,
928
.read = grub_ext2_read,
929
.close = grub_ext2_close,
930
.label = grub_ext2_label,
931
.uuid = grub_ext2_uuid,
932
.mtime = grub_ext2_mtime,
934
.reserved_first_sector = 1,
941
grub_fs_register (&grub_ext2_fs);
947
grub_fs_unregister (&grub_ext2_fs);
added
removed
fs/ext2.c
