5404 smbfs needs mmap support
Portions contributed by: Gordon Ross <gordon.w.ross@gmail.com>

*** 879,927 ****
                  *sbp = smi->smi_statvfsbuf;
          mutex_exit(&smi->smi_lock);
          return (error);
  }
  
- static kmutex_t smbfs_syncbusy;
- 
  /*
   * Flush dirty smbfs files for file system vfsp.
   * If vfsp == NULL, all smbfs files are flushed.
   */
  /*ARGSUSED*/
  static int
  smbfs_sync(vfs_t *vfsp, short flag, cred_t *cr)
  {
          /*
!          * Cross-zone calls are OK here, since this translates to a
!          * VOP_PUTPAGE(B_ASYNC), which gets picked up by the right zone.
           */
!         if (!(flag & SYNC_ATTR) && mutex_tryenter(&smbfs_syncbusy) != 0) {
!                 smbfs_rflush(vfsp, cr);
!                 mutex_exit(&smbfs_syncbusy);
          }
  
          return (0);
  }
  
  /*
   * Initialization routine for VFS routines.  Should only be called once
   */
  int
  smbfs_vfsinit(void)
  {
-         mutex_init(&smbfs_syncbusy, NULL, MUTEX_DEFAULT, NULL);
          return (0);
  }
  
  /*
   * Shutdown routine for VFS routines.  Should only be called once
   */
  void
  smbfs_vfsfini(void)
  {
-         mutex_destroy(&smbfs_syncbusy);
  }
  
  void
  smbfs_freevfs(vfs_t *vfsp)
  {
--- 879,934 ----
                  *sbp = smi->smi_statvfsbuf;
          mutex_exit(&smi->smi_lock);
          return (error);
  }
  
  /*
   * Flush dirty smbfs files for file system vfsp.
   * If vfsp == NULL, all smbfs files are flushed.
   */
  /*ARGSUSED*/
  static int
  smbfs_sync(vfs_t *vfsp, short flag, cred_t *cr)
  {
+ 
          /*
!          * SYNC_ATTR is used by fsflush() to force old filesystems like UFS
!          * to sync metadata, which they would otherwise cache indefinitely.
!          * Semantically, the only requirement is that the sync be initiated.
!          * Assume the server-side takes care of attribute sync.
           */
!         if (flag & SYNC_ATTR)
!                 return (0);
! 
!         if (vfsp == NULL) {
!                 /*
!                  * Flush ALL smbfs mounts in this zone.
!                  */
!                 smbfs_flushall(cr);
!                 return (0);
          }
  
+         smbfs_rflush(vfsp, cr);
+ 
          return (0);
  }
  
  /*
   * Initialization routine for VFS routines.  Should only be called once
   */
  int
  smbfs_vfsinit(void)
  {
          return (0);
  }
  
  /*
   * Shutdown routine for VFS routines.  Should only be called once
   */
  void
  smbfs_vfsfini(void)
  {
  }
  
  void
  smbfs_freevfs(vfs_t *vfsp)
  {