struct super_operations {
void (*read_inode) (struct inode *);
/* reiserfs kludge. reiserfs needs 64 bits of information to
** find an inode. We are using the read_inode2 call to get
** that information. We don't like this, and are waiting on some
** VFS changes for the real solution.
** iget4 calls read_inode2, iff it is defined
*/
void (*read_inode2) (struct inode *, void *) ;
void (*dirty_inode) (struct inode *);
void (*write_inode) (struct inode *, int);
void (*put_inode) (struct inode *);
void (*delete_inode) (struct inode *);
void (*put_super) (struct super_block *);
void (*write_super) (struct super_block *);
void (*write_super_lockfs) (struct super_block *);
void (*unlockfs) (struct super_block *);
int (*statfs) (struct super_block *, struct statfs *);
int (*remount_fs) (struct super_block *, int *, char *);
void (*clear_inode) (struct inode *);
void (*umount_begin) (struct super_block *);
/* Following are for knfsd to interact with "interesting" filesystems
* Currently just reiserfs, but possibly FAT and others later
*
* fh_to_dentry is given a filehandle fragement with length, and a type flag
* and must return a dentry for the referenced object or, if "parent" is
* set, a dentry for the parent of the object.
* If a dentry cannot be found, a "root" dentry should be created and
* flaged as DCACHE_NFSD_DISCONNECTED. nfsd_iget is an example implementation.
*
* dentry_to_fh is given a dentry and must generate the filesys specific
* part of the file handle. Available length is passed in *lenp and used
* length should be returned therein.
* If need_parent is set, then dentry_to_fh should encode sufficient information
* to find the (current) parent.
* dentry_to_fh should return a 1byte "type" which will be passed back in
* the fhtype arguement to fh_to_dentry. Type of 0 is reserved.
* If filesystem was exportable before the introduction of fh_to_dentry,
* types 1 and 2 should be used is that same way as the generic code.
* Type 255 means error.
*
* Lengths are in units of 4bytes, not bytes.
*/
struct dentry * (*fh_to_dentry)(struct super_block *sb, __u32 *fh, int len, int fhtype, int parent);
int (*dentry_to_fh)(struct dentry *, __u32 *fh, int *lenp, int need_parent);
int (*show_options)(struct seq_file *, struct vfsmount *);
};
struct inode_operations {
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);
int (*follow_link) (struct dentry *, struct nameidata *);
void (*truncate) (struct inode *);
int (*permission) (struct inode *, int);
int (*revalidate) (struct dentry *);
int (*setattr) (struct dentry *, struct iattr *);
int (*getattr) (struct dentry *, struct iattr *);
};
from fs.h:
struct file_operations {
struct module *owner;
loff_t (*llseek) (struct file *, loff_t, int);
ssize_t (*read) (struct file *, char *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
int (*open) (struct inode *, struct file *);
int (*flush) (struct file *);
int (*release) (struct inode *, struct file *);
int (*fsync) (struct file *, struct dentry *, int datasync);
int (*fasync) (int, struct file *, int);
int (*lock) (struct file *, int, struct file_lock *);
ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
};