/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card ([email protected]) * Laboratoire MASI - Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/include/linux/minix_fs.h * * Copyright (C) 1991, 1992 Linus Torvalds */ #include <linux/fs.h> #include <linux/ext2_fs.h> #include <linux/blockgroup_lock.h> #include <linux/percpu_counter.h> #include <linux/rbtree.h> #include <linux/mm.h> #include <linux/highmem.h> /* XXX Here for now... not interested in restructing headers JUST now */ /* data type for block offset of block group */ ext2_grpblk_t; /* data type for filesystem-wide blocks number */ ext2_fsblk_t; #define E2FSBLK … struct ext2_reserve_window { … }; struct ext2_reserve_window_node { … }; struct ext2_block_alloc_info { … }; #define rsv_start … #define rsv_end … struct mb_cache; /* * second extended-fs super-block data in memory */ struct ext2_sb_info { … }; static inline spinlock_t * sb_bgl_lock(struct ext2_sb_info *sbi, unsigned int block_group) { … } /* * Define EXT2FS_DEBUG to produce debug messages */ #undef EXT2FS_DEBUG /* * Define EXT2_RESERVATION to reserve data blocks for expanding files */ #define EXT2_DEFAULT_RESERVE_BLOCKS … /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ #define EXT2_MAX_RESERVE_BLOCKS … #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED … /* * The second extended file system version */ #define EXT2FS_DATE … #define EXT2FS_VERSION … /* * Debug code */ #ifdef EXT2FS_DEBUG #define ext2_debug … #else #define ext2_debug(f, a...) … #endif /* * Special inode numbers */ #define EXT2_BAD_INO … #define EXT2_ROOT_INO … #define EXT2_BOOT_LOADER_INO … #define EXT2_UNDEL_DIR_INO … /* First non-reserved inode for old ext2 filesystems */ #define EXT2_GOOD_OLD_FIRST_INO … static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb) { … } /* * Macro-instructions used to manage several block sizes */ #define EXT2_MIN_BLOCK_SIZE … #define EXT2_MAX_BLOCK_SIZE … #define EXT2_MIN_BLOCK_LOG_SIZE … #define EXT2_MAX_BLOCK_LOG_SIZE … #define EXT2_BLOCK_SIZE(s) … #define EXT2_ADDR_PER_BLOCK(s) … #define EXT2_BLOCK_SIZE_BITS(s) … #define EXT2_ADDR_PER_BLOCK_BITS(s) … #define EXT2_INODE_SIZE(s) … #define EXT2_FIRST_INO(s) … /* * Structure of a blocks group descriptor */ struct ext2_group_desc { … }; /* * Macro-instructions used to manage group descriptors */ #define EXT2_BLOCKS_PER_GROUP(s) … #define EXT2_DESC_PER_BLOCK(s) … #define EXT2_INODES_PER_GROUP(s) … #define EXT2_DESC_PER_BLOCK_BITS(s) … /* * Constants relative to the data blocks */ #define EXT2_NDIR_BLOCKS … #define EXT2_IND_BLOCK … #define EXT2_DIND_BLOCK … #define EXT2_TIND_BLOCK … #define EXT2_N_BLOCKS … /* * Inode flags (GETFLAGS/SETFLAGS) */ #define EXT2_SECRM_FL … #define EXT2_UNRM_FL … #define EXT2_COMPR_FL … #define EXT2_SYNC_FL … #define EXT2_IMMUTABLE_FL … #define EXT2_APPEND_FL … #define EXT2_NODUMP_FL … #define EXT2_NOATIME_FL … /* Reserved for compression usage... */ #define EXT2_DIRTY_FL … #define EXT2_COMPRBLK_FL … #define EXT2_NOCOMP_FL … #define EXT2_ECOMPR_FL … /* End compression flags --- maybe not all used */ #define EXT2_BTREE_FL … #define EXT2_INDEX_FL … #define EXT2_IMAGIC_FL … #define EXT2_JOURNAL_DATA_FL … #define EXT2_NOTAIL_FL … #define EXT2_DIRSYNC_FL … #define EXT2_TOPDIR_FL … #define EXT2_RESERVED_FL … #define EXT2_FL_USER_VISIBLE … #define EXT2_FL_USER_MODIFIABLE … /* Flags that should be inherited by new inodes from their parent. */ #define EXT2_FL_INHERITED … /* Flags that are appropriate for regular files (all but dir-specific ones). */ #define EXT2_REG_FLMASK … /* Flags that are appropriate for non-directories/regular files. */ #define EXT2_OTHER_FLMASK … /* Mask out flags that are inappropriate for the given type of inode. */ static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags) { … } /* * ioctl commands */ #define EXT2_IOC_GETVERSION … #define EXT2_IOC_SETVERSION … #define EXT2_IOC_GETRSVSZ … #define EXT2_IOC_SETRSVSZ … /* * ioctl commands in 32 bit emulation */ #define EXT2_IOC32_GETVERSION … #define EXT2_IOC32_SETVERSION … /* * Structure of an inode on the disk */ struct ext2_inode { … }; #define i_size_high … #define i_reserved1 … #define i_frag … #define i_fsize … #define i_uid_low … #define i_gid_low … #define i_uid_high … #define i_gid_high … #define i_reserved2 … /* * File system states */ #define EXT2_VALID_FS … #define EXT2_ERROR_FS … #define EFSCORRUPTED … /* * Mount flags */ #define EXT2_MOUNT_OLDALLOC … #define EXT2_MOUNT_GRPID … #define EXT2_MOUNT_DEBUG … #define EXT2_MOUNT_ERRORS_CONT … #define EXT2_MOUNT_ERRORS_RO … #define EXT2_MOUNT_ERRORS_PANIC … #define EXT2_MOUNT_MINIX_DF … #define EXT2_MOUNT_NOBH … #define EXT2_MOUNT_NO_UID32 … #define EXT2_MOUNT_XATTR_USER … #define EXT2_MOUNT_POSIX_ACL … #define EXT2_MOUNT_XIP … #define EXT2_MOUNT_USRQUOTA … #define EXT2_MOUNT_GRPQUOTA … #define EXT2_MOUNT_RESERVATION … #define EXT2_MOUNT_DAX … #define clear_opt(o, opt) … #define set_opt(o, opt) … #define test_opt(sb, opt) … /* * Maximal mount counts between two filesystem checks */ #define EXT2_DFL_MAX_MNT_COUNT … #define EXT2_DFL_CHECKINTERVAL … /* * Behaviour when detecting errors */ #define EXT2_ERRORS_CONTINUE … #define EXT2_ERRORS_RO … #define EXT2_ERRORS_PANIC … #define EXT2_ERRORS_DEFAULT … /* * Allocation flags */ #define EXT2_ALLOC_NORESERVE … /* * Structure of the super block */ struct ext2_super_block { … }; /* * Codes for operating systems */ #define EXT2_OS_LINUX … #define EXT2_OS_HURD … #define EXT2_OS_MASIX … #define EXT2_OS_FREEBSD … #define EXT2_OS_LITES … /* * Revision levels */ #define EXT2_GOOD_OLD_REV … #define EXT2_DYNAMIC_REV … #define EXT2_CURRENT_REV … #define EXT2_MAX_SUPP_REV … #define EXT2_GOOD_OLD_INODE_SIZE … /* * Feature set definitions */ #define EXT2_HAS_COMPAT_FEATURE(sb,mask) … #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) … #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) … #define EXT2_SET_COMPAT_FEATURE(sb,mask) … #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) … #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) … #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) … #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) … #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) … #define EXT2_FEATURE_COMPAT_DIR_PREALLOC … #define EXT2_FEATURE_COMPAT_IMAGIC_INODES … #define EXT3_FEATURE_COMPAT_HAS_JOURNAL … #define EXT2_FEATURE_COMPAT_EXT_ATTR … #define EXT2_FEATURE_COMPAT_RESIZE_INO … #define EXT2_FEATURE_COMPAT_DIR_INDEX … #define EXT2_FEATURE_COMPAT_ANY … #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER … #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE … #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR … #define EXT2_FEATURE_RO_COMPAT_ANY … #define EXT2_FEATURE_INCOMPAT_COMPRESSION … #define EXT2_FEATURE_INCOMPAT_FILETYPE … #define EXT3_FEATURE_INCOMPAT_RECOVER … #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV … #define EXT2_FEATURE_INCOMPAT_META_BG … #define EXT2_FEATURE_INCOMPAT_ANY … #define EXT2_FEATURE_COMPAT_SUPP … #define EXT2_FEATURE_INCOMPAT_SUPP … #define EXT2_FEATURE_RO_COMPAT_SUPP … #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED … #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED … /* * Default values for user and/or group using reserved blocks */ #define EXT2_DEF_RESUID … #define EXT2_DEF_RESGID … /* * Default mount options */ #define EXT2_DEFM_DEBUG … #define EXT2_DEFM_BSDGROUPS … #define EXT2_DEFM_XATTR_USER … #define EXT2_DEFM_ACL … #define EXT2_DEFM_UID16 … /* Not used by ext2, but reserved for use by ext3 */ #define EXT3_DEFM_JMODE … #define EXT3_DEFM_JMODE_DATA … #define EXT3_DEFM_JMODE_ORDERED … #define EXT3_DEFM_JMODE_WBACK … /* * Structure of a directory entry */ struct ext2_dir_entry { … }; /* * The new version of the directory entry. Since EXT2 structures are * stored in intel byte order, and the name_len field could never be * bigger than 255 chars, it's safe to reclaim the extra byte for the * file_type field. */ struct ext2_dir_entry_2 { … }; /* * EXT2_DIR_PAD defines the directory entries boundaries * * NOTE: It must be a multiple of 4 */ #define EXT2_DIR_PAD … #define EXT2_DIR_ROUND … #define EXT2_DIR_REC_LEN(name_len) … #define EXT2_MAX_REC_LEN … static inline void verify_offsets(void) { … } /* * ext2 mount options */ struct ext2_mount_options { … }; /* * second extended file system inode data in memory */ struct ext2_inode_info { … }; /* * Inode dynamic state flags */ #define EXT2_STATE_NEW … /* * Function prototypes */ /* * Ok, these declarations are also in <linux/kernel.h> but none of the * ext2 source programs needs to include it so they are duplicated here. */ static inline struct ext2_inode_info *EXT2_I(struct inode *inode) { … } /* balloc.c */ extern int ext2_bg_has_super(struct super_block *sb, int group); extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group); extern ext2_fsblk_t ext2_new_blocks(struct inode *, ext2_fsblk_t, unsigned long *, int *, unsigned int); extern int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk, unsigned int count); extern void ext2_free_blocks(struct inode *, ext2_fsblk_t, unsigned long); extern unsigned long ext2_count_free_blocks (struct super_block *); extern unsigned long ext2_count_dirs (struct super_block *); extern struct ext2_group_desc * ext2_get_group_desc(struct super_block * sb, unsigned int block_group, struct buffer_head ** bh); extern void ext2_discard_reservation (struct inode *); extern int ext2_should_retry_alloc(struct super_block *sb, int *retries); extern void ext2_init_block_alloc_info(struct inode *); extern void ext2_rsv_window_add(struct super_block *sb, struct ext2_reserve_window_node *rsv); /* dir.c */ int ext2_add_link(struct dentry *, struct inode *); int ext2_inode_by_name(struct inode *dir, const struct qstr *child, ino_t *ino); int ext2_make_empty(struct inode *, struct inode *); struct ext2_dir_entry_2 *ext2_find_entry(struct inode *, const struct qstr *, struct folio **foliop); int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct folio *folio); int ext2_empty_dir(struct inode *); struct ext2_dir_entry_2 *ext2_dotdot(struct inode *dir, struct folio **foliop); int ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de, struct folio *folio, struct inode *inode, bool update_times); /* ialloc.c */ extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *); extern void ext2_free_inode (struct inode *); extern unsigned long ext2_count_free_inodes (struct super_block *); extern unsigned long ext2_count_free (struct buffer_head *, unsigned); /* inode.c */ extern struct inode *ext2_iget (struct super_block *, unsigned long); extern int ext2_write_inode (struct inode *, struct writeback_control *); extern void ext2_evict_inode(struct inode *); void ext2_write_failed(struct address_space *mapping, loff_t to); extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int); extern int ext2_setattr (struct mnt_idmap *, struct dentry *, struct iattr *); extern int ext2_getattr (struct mnt_idmap *, const struct path *, struct kstat *, u32, unsigned int); extern void ext2_set_inode_flags(struct inode *inode); extern int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len); /* ioctl.c */ extern int ext2_fileattr_get(struct dentry *dentry, struct fileattr *fa); extern int ext2_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry, struct fileattr *fa); extern long ext2_ioctl(struct file *, unsigned int, unsigned long); extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long); /* namei.c */ struct dentry *ext2_get_parent(struct dentry *child); /* super.c */ extern __printf(3, 4) void ext2_error(struct super_block *, const char *, const char *, ...); extern __printf(3, 4) void ext2_msg(struct super_block *, const char *, const char *, ...); extern void ext2_update_dynamic_rev (struct super_block *sb); extern void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es, int wait); /* * Inodes and files operations */ /* dir.c */ extern const struct file_operations ext2_dir_operations; /* file.c */ extern int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync); extern const struct inode_operations ext2_file_inode_operations; extern const struct file_operations ext2_file_operations; /* inode.c */ extern void ext2_set_file_ops(struct inode *inode); extern const struct address_space_operations ext2_aops; extern const struct iomap_ops ext2_iomap_ops; /* namei.c */ extern const struct inode_operations ext2_dir_inode_operations; extern const struct inode_operations ext2_special_inode_operations; /* symlink.c */ extern const struct inode_operations ext2_fast_symlink_inode_operations; extern const struct inode_operations ext2_symlink_inode_operations; static inline ext2_fsblk_t ext2_group_first_block_no(struct super_block *sb, unsigned long group_no) { … } static inline ext2_fsblk_t ext2_group_last_block_no(struct super_block *sb, unsigned long group_no) { … } #define ext2_set_bit … #define ext2_clear_bit … #define ext2_test_bit … #define ext2_find_first_zero_bit … #define ext2_find_next_zero_bit …
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