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- /*
- * Copyright (c) 1999, 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * File: ubc.h
- * Author: Umesh Vaishampayan [umeshv@apple.com]
- * 05-Aug-1999 umeshv Created.
- *
- * Header file for Unified Buffer Cache.
- *
- */
-
- #ifndef _SYS_UBC_H_
- #define _SYS_UBC_H_
-
- #include <sys/types.h>
- #include <sys/ucred.h>
- #include <sys/vnode.h>
-
- #include <sys/cdefs.h>
-
- #include <mach/memory_object_types.h>
-
- #define UBC_INFO_NULL ((struct ubc_info *) 0)
- #define UBC_NOINFO ((struct ubc_info *)0xDEADD1ED)
-
- extern struct zone *ubc_info_zone;
-
- /*
- * The following data structure keeps the information to associate
- * a vnode to the correspondig VM objects.
- */
-
- struct ubc_info {
- memory_object_t ui_pager; /* pager */
- memory_object_control_t ui_control; /* VM control for the pager */
- long ui_flags; /* flags */
- struct vnode *ui_vnode; /* The vnode for this ubc_info */
- struct ucred *ui_ucred; /* holds credentials for NFS paging */
- int ui_refcount;/* ref count on the ubc_info */
- off_t ui_size; /* file size for the vnode */
- long ui_mapped; /* is it currently mapped */
- };
-
- /* Defines for ui_flags */
- #define UI_NONE 0x00000000 /* none */
- #define UI_HASPAGER 0x00000001 /* has a pager associated */
- #define UI_INITED 0x00000002 /* newly initialized vnode */
- #define UI_HASOBJREF 0x00000004 /* hold a reference on object */
- #define UI_WASMAPPED 0x00000008 /* vnode was mapped */
- #define UI_DONTCACHE 0x00000010 /* do not cache object */
-
- /*
- * exported primitives for loadable file systems.
- */
-
- __BEGIN_DECLS
- int ubc_info_init __P((struct vnode *));
- void ubc_info_deallocate __P((struct ubc_info *));
- int ubc_setsize __P((struct vnode *, off_t));
- off_t ubc_getsize __P((struct vnode *));
- int ubc_uncache __P((struct vnode *));
- int ubc_umount __P((struct mount *));
- void ubc_unmountall __P(());
- int ubc_setcred __P((struct vnode *, struct proc *));
- struct ucred *ubc_getcred __P((struct vnode *));
- memory_object_t ubc_getpager __P((struct vnode *));
- memory_object_control_t ubc_getobject __P((struct vnode *, int));
- int ubc_setpager __P((struct vnode *, memory_object_t));
- int ubc_setflags __P((struct vnode *, int));
- int ubc_clearflags __P((struct vnode *, int));
- int ubc_issetflags __P((struct vnode *, int));
- off_t ubc_blktooff __P((struct vnode *, daddr_t));
- daddr_t ubc_offtoblk __P((struct vnode *, off_t));
- int ubc_clean __P((struct vnode *, int));
- int ubc_pushdirty __P((struct vnode *));
- int ubc_pushdirty_range __P((struct vnode *, off_t, off_t));
- int ubc_hold __P((struct vnode *));
- void ubc_rele __P((struct vnode *));
- void ubc_map __P((struct vnode *));
- int ubc_destroy_named __P((struct vnode *));
- int ubc_release_named __P((struct vnode *));
- int ubc_invalidate __P((struct vnode *, off_t, size_t));
- int ubc_isinuse __P((struct vnode *, int));
-
- int ubc_page_op __P((struct vnode *, off_t, int, vm_offset_t *, int *));
-
- /* cluster IO routines */
- int cluster_read __P((struct vnode *, struct uio *, off_t, int, int));
- int advisory_read __P((struct vnode *, off_t, off_t, int, int));
- int cluster_write __P((struct vnode *, struct uio*, off_t, off_t,
- off_t, off_t, int, int));
- int cluster_push __P((struct vnode *));
- int cluster_pageout __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
- off_t, int, int));
- int cluster_pagein __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
- off_t, int, int));
- int cluster_bp __P((struct buf *));
-
- /* UPL routines */
- int ubc_create_upl __P((struct vnode *, off_t, long, upl_t *,
- upl_page_info_t **, int));
- int ubc_upl_map __P((upl_t, vm_offset_t *));
- int ubc_upl_unmap __P((upl_t));
- int ubc_upl_commit __P((upl_t));
- int ubc_upl_commit_range __P((upl_t, vm_offset_t, vm_size_t, int));
- int ubc_upl_abort __P((upl_t, int));
- int ubc_upl_abort_range __P((upl_t, vm_offset_t, vm_size_t, int));
- upl_page_info_t *ubc_upl_pageinfo __P((upl_t));
- __END_DECLS
-
- #define UBCINFOMISSING(vp) \
- ((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_INFO_NULL))
-
- #define UBCINFORECLAIMED(vp) \
- ((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_NOINFO))
-
- #define UBCINFOEXISTS(vp) \
- ((vp) && ((vp)->v_type == VREG) && \
- ((vp)->v_ubcinfo) && ((vp)->v_ubcinfo != UBC_NOINFO))
-
- #define UBCISVALID(vp) \
- ((vp) && ((vp)->v_type == VREG) && !((vp)->v_flag & VSYSTEM))
-
- #define UBCINVALID(vp) \
- (((vp) == NULL) || ((vp) && ((vp)->v_type != VREG)) \
- || ((vp) && ((vp)->v_flag & VSYSTEM)))
-
- #define UBCINFOCHECK(fun, vp) \
- if ((vp) && ((vp)->v_type == VREG) && \
- (((vp)->v_ubcinfo == UBC_INFO_NULL) \
- || ((vp)->v_ubcinfo == UBC_NOINFO))) \
- panic("%s: lost ubc_info", (fun));
-
- /* Flags for ubc_getobject() */
- #define UBC_FLAGS_NONE 0x0000
- #define UBC_HOLDOBJECT 0x0001
-
- #endif /* _SYS_UBC_H_ */
-
-