Implement ioctl _FIODIRECTIO
Kill flags arg in smbfs_purge_caches
5404 smbfs needs mmap support
Portions contributed by: Gordon Ross <gordon.w.ross@gmail.com>

*** 235,245 ****
--- 235,248 ----
  void smbfs_zonelist_remove(smbmntinfo_t *smi);
  
  int smbfs_check_table(struct vfs *vfsp, struct smbnode *srp);
  void smbfs_destroy_table(struct vfs *vfsp);
  void smbfs_rflush(struct vfs *vfsp, cred_t *cr);
+ void smbfs_flushall(cred_t *cr);
  
+ int smbfs_directio(vnode_t *vp, int cmd, cred_t *cr);
+ 
  uint32_t smbfs_newnum(void);
  int smbfs_newname(char *buf, size_t buflen);
  
  /*
   * Function definitions - those having to do with
*** 252,263 ****
  #ifndef DEBUG
  #define smbfs_attrcache_rm_locked(np)   (np)->r_attrtime = gethrtime()
  #endif
  void smbfs_attr_touchdir(struct smbnode *dnp);
  void smbfs_attrcache_fa(vnode_t *vp, struct smbfattr *fap);
- void smbfs_cache_check(struct vnode *vp, struct smbfattr *fap);
  
  void smbfs_addfree(struct smbnode *sp);
  void smbfs_rmhash(struct smbnode *);
  
  /* See avl_create in smbfs_vfsops.c */
  void smbfs_init_hash_avl(avl_tree_t *);
--- 255,268 ----
  #ifndef DEBUG
  #define smbfs_attrcache_rm_locked(np)   (np)->r_attrtime = gethrtime()
  #endif
  void smbfs_attr_touchdir(struct smbnode *dnp);
  void smbfs_attrcache_fa(vnode_t *vp, struct smbfattr *fap);
  
+ int smbfs_validate_caches(struct vnode *vp, cred_t *cr);
+ void smbfs_purge_caches(struct vnode *vp, cred_t *cr);
+ 
  void smbfs_addfree(struct smbnode *sp);
  void smbfs_rmhash(struct smbnode *);
  
  /* See avl_create in smbfs_vfsops.c */
  void smbfs_init_hash_avl(avl_tree_t *);
*** 281,290 ****
--- 286,299 ----
  int smbfs_readvnode(vnode_t *, uio_t *, cred_t *, struct vattr *);
  int smbfs_writevnode(vnode_t *vp, uio_t *uiop, cred_t *cr,
                          int ioflag, int timo);
  int smbfsgetattr(vnode_t *vp, struct vattr *vap, cred_t *cr);
  
+ /* nfs: writerp writenp */
+ /* nfs_putpages? */
+ void smbfs_invalidate_pages(vnode_t *vp, u_offset_t off, cred_t *cr);
+ 
  /* smbfs ACL support */
  int smbfs_acl_getids(vnode_t *, cred_t *);
  int smbfs_acl_setids(vnode_t *, vattr_t *, cred_t *);
  int smbfs_acl_getvsa(vnode_t *, vsecattr_t *, int, cred_t *);
  int smbfs_acl_setvsa(vnode_t *, vsecattr_t *, int, cred_t *);