/* $NetBSD: uvm_vnode.h,v 1.9 2000/03/26 20:54:48 kleink Exp $ */ /* * * Copyright (c) 1997 Charles D. Cranor and Washington University. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles D. Cranor and * Washington University. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * from: Id: uvm_vnode.h,v 1.1.2.4 1997/10/03 21:18:24 chuck Exp */ #ifndef _UVM_UVM_VNODE_H_ #define _UVM_UVM_VNODE_H_ /* * uvm_vnode.h * * vnode handle into the VM system. */ /* * the uvm_vnode structure. put at the top of the vnode data structure. * this allows: * (struct vnode *) == (struct uvm_vnode *) == (struct uvm_object *) */ struct uvm_vnode { struct uvm_object u_obj; /* the actual VM object */ int u_flags; /* flags */ int u_nio; /* number of running I/O requests */ voff_t u_size; /* size of object */ /* the following entry is locked by uvn_wl_lock */ LIST_ENTRY(uvm_vnode) u_wlist; /* list of writeable vnode objects */ /* the following entry is locked by uvn_sync_lock */ SIMPLEQ_ENTRY(uvm_vnode) u_syncq; /* vnode objects due for a "sync" */ }; /* * u_flags values */ #define UVM_VNODE_VALID 0x001 /* we are attached to the vnode */ #define UVM_VNODE_CANPERSIST 0x002 /* we can persist after ref == 0 */ #define UVM_VNODE_ALOCK 0x004 /* uvn_attach is locked out */ #define UVM_VNODE_DYING 0x008 /* final detach/terminate in progress */ #define UVM_VNODE_RELKILL 0x010 /* uvn should be killed by releasepg when final i/o is done */ #define UVM_VNODE_WANTED 0x020 /* someone is waiting for alock, dying, or relkill to clear */ #define UVM_VNODE_VNISLOCKED 0x040 /* underlying vnode struct is locked (valid when DYING is true) */ #define UVM_VNODE_IOSYNC 0x080 /* I/O sync in progress ... setter sleeps on &uvn->u_nio */ #define UVM_VNODE_IOSYNCWANTED 0x100 /* a process is waiting for the i/o sync to clear so it can do i/o */ #define UVM_VNODE_WRITEABLE 0x200 /* uvn has pages that are writeable */ /* * UVM_VNODE_BLOCKED: any condition that should new processes from * touching the vnode [set WANTED and sleep to wait for it to clear] */ #define UVM_VNODE_BLOCKED (UVM_VNODE_ALOCK|UVM_VNODE_DYING|UVM_VNODE_RELKILL) #ifdef _KERNEL /* * prototypes */ #if 0 /* * moved uvn_attach to uvm_extern.h because uvm_vnode.h is needed to * include sys/vnode.h, and files that include sys/vnode.h don't know * what a vm_prot_t is. */ struct uvm_object *uvn_attach __P((void *, vm_prot_t)); #endif #endif /* _KERNEL */ #endif /* _UVM_UVM_VNODE_H_ */