/* * Linux file system information. * (from /usr/src/linux/include/linux/) */ /* * The Linux inode * (from fs.h) */ struct inode { struct list_head i_hash; struct list_head i_list; struct list_head i_dentry; unsigned long i_ino; unsigned int i_count; /* reference count */ kdev_t i_dev; umode_t i_mode; nlink_t i_nlink; uid_t i_uid; gid_t i_gid; kdev_t i_rdev; off_t i_size; time_t i_atime; time_t i_mtime; time_t i_ctime; unsigned long i_blksize; unsigned long i_blocks; unsigned long i_version; unsigned long i_nrpages; struct semaphore i_sem; struct semaphore i_atomic_write; struct inode_operations *i_op; struct super_block *i_sb; struct wait_queue *i_wait; struct file_lock *i_flock; struct vm_area_struct *i_mmap; struct page *i_pages; struct dquot *i_dquot[MAXQUOTAS]; unsigned long i_state; /* dirty, etc */ unsigned int i_flags; unsigned char i_pipe; unsigned char i_sock; int i_writecount; unsigned int i_attr_flags; __u32 i_generation; union { struct pipe_inode_info pipe_i; struct minix_inode_info minix_i; struct ext2_inode_info ext2_i; /* see ext2_fs_i.h */ struct hpfs_inode_info hpfs_i; struct ntfs_inode_info ntfs_i; struct msdos_inode_info msdos_i; struct umsdos_inode_info umsdos_i; struct iso_inode_info isofs_i; struct nfs_inode_info nfs_i; struct sysv_inode_info sysv_i; struct affs_inode_info affs_i; struct ufs_inode_info ufs_i; struct efs_inode_info efs_i; struct romfs_inode_info romfs_i; struct coda_inode_info coda_i; struct smb_inode_info smbfs_i; struct hfs_inode_info hfs_i; struct adfs_inode_info adfs_i; struct qnx4_inode_info qnx4_i; struct usbdev_inode_info usbdev_i; struct udf_inode_info udf_i; struct reiserfs_inode_info reiserfs_i; struct socket socket_i; void *generic_ip; } u; }; /* * General set of operations allowed. Not defined * for all file system types. * (from fs.h) */ struct inode_operations { struct file_operations * default_file_ops; int (*create) (struct inode *,struct dentry *,int); struct dentry * (*lookup) (struct inode *,struct dentry *); int (*link) (struct dentry *,struct inode *,struct dentry *); int (*unlink) (struct inode *,struct dentry *); int (*symlink) (struct inode *,struct dentry *,const char *); int (*mkdir) (struct inode *,struct dentry *,int); int (*rmdir) (struct inode *,struct dentry *); int (*mknod) (struct inode *,struct dentry *,int,int); int (*rename) (struct inode *, struct dentry *, struct inode *, struct dentry *); int (*readlink) (struct dentry *, char *,int); struct dentry * (*follow_link) (struct dentry *, struct dentry *, unsigned int); int (*readpage) (struct file *, struct page *); int (*writepage) (struct file *, struct page *); int (*bmap) (struct inode *,int); void (*truncate) (struct inode *); int (*permission) (struct inode *, int); int (*smap) (struct inode *,int); int (*updatepage) (struct file *, struct page *, unsigned long, unsigned int, int); int (*revalidate) (struct dentry *); }; /* * Structure of a directory entry * (from ext2_fs.h) */ #define EXT2_NAME_LEN 255 struct ext2_dir_entry { __u32 inode; /* Inode number */ __u16 rec_len; /* Directory entry length */ __u16 name_len; /* Name length */ char name[EXT2_NAME_LEN]; /* File name */ }; /* * Cached directory information * (from dcache.h) */ struct dentry { int d_count; unsigned int d_flags; struct inode * d_inode; /* Where the name belongs to - NULL is negative */ struct dentry * d_parent; /* parent directory */ struct dentry * d_mounts; /* mount information */ struct dentry * d_covers; struct list_head d_hash; /* lookup hash list */ struct list_head d_lru; /* d_count = 0 LRU list */ struct list_head d_child; /* child of parent list */ struct list_head d_subdirs; /* our children */ struct list_head d_alias; /* inode alias list */ struct qstr d_name; unsigned long d_time; /* used by d_revalidate */ struct dentry_operations *d_op; struct super_block * d_sb; /* The root of the dentry tree */ unsigned long d_reftime; /* last time referenced */ void * d_fsdata; /* fs-specific data */ unsigned char d_iname[DNAME_INLINE_LEN]; /* small names */ }; /* * "quick string" -- holds names * (from dcache.h) */ struct qstr { const unsigned char * name; unsigned int len; unsigned int hash; }; /* * The Linux Super-Block * (from fs.h) */ struct super_block { struct list_head s_list; /* Keep this first */ kdev_t s_dev; unsigned long s_blocksize; unsigned char s_blocksize_bits; unsigned char s_lock; unsigned char s_rd_only; unsigned char s_dirt; struct file_system_type *s_type; struct super_operations *s_op; struct dquot_operations *dq_op; unsigned long s_flags; unsigned long s_magic; unsigned long s_time; struct dentry *s_root; struct wait_queue *s_wait; struct inode *s_ibasket; short int s_ibasket_count; short int s_ibasket_max; struct list_head s_dirty; /* dirty inodes */ union { struct minix_sb_info minix_sb; struct ext2_sb_info ext2_sb; struct hpfs_sb_info hpfs_sb; struct ntfs_sb_info ntfs_sb; struct msdos_sb_info msdos_sb; struct isofs_sb_info isofs_sb; struct nfs_sb_info nfs_sb; struct sysv_sb_info sysv_sb; struct affs_sb_info affs_sb; struct ufs_sb_info ufs_sb; struct efs_sb_info efs_sb; struct romfs_sb_info romfs_sb; struct smb_sb_info smbfs_sb; struct hfs_sb_info hfs_sb; struct adfs_sb_info adfs_sb; struct qnx4_sb_info qnx4_sb; struct usbdev_sb_info usbdevfs_sb; struct udf_sb_info udf_sb; struct reiserfs_sb_info reiserfs_sb; void *generic_sbp; } u; /* * The next field is for VFS *only*. No filesystems have any business * even looking at it. You had been warned. */ struct semaphore s_vfs_rename_sem; /* Kludge */ };