003 File Manager
Current Path:
/usr/include/fs/unionfs
usr
/
include
/
fs
/
unionfs
/
📁
..
📄
union.h
(6.39 KB)
Editing: union.h
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1994 The Regents of the University of California. * Copyright (c) 1994 Jan-Simon Pendry. * Copyright (c) 2005, 2006 Masanori Ozawa <ozawa@ongs.co.jp>, ONGS Inc. * Copyright (c) 2006 Daichi Goto <daichi@freebsd.org> * All rights reserved. * * This code is derived from software donated to Berkeley by * Jan-Simon Pendry. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * @(#)union.h 8.9 (Berkeley) 12/10/94 * $FreeBSD$ */ #ifdef _KERNEL /* copy method of attr from lower to upper */ typedef enum _unionfs_copymode { UNIONFS_TRADITIONAL = 0, UNIONFS_TRANSPARENT, UNIONFS_MASQUERADE } unionfs_copymode; /* whiteout policy of upper layer */ typedef enum _unionfs_whitemode { UNIONFS_WHITE_ALWAYS = 0, UNIONFS_WHITE_WHENNEEDED } unionfs_whitemode; struct unionfs_mount { struct vnode *um_lowervp; /* VREFed once */ struct vnode *um_uppervp; /* VREFed once */ struct vnode *um_rootvp; /* ROOT vnode */ unionfs_copymode um_copymode; unionfs_whitemode um_whitemode; uid_t um_uid; gid_t um_gid; u_short um_udir; u_short um_ufile; }; /* unionfs status list */ struct unionfs_node_status { LIST_ENTRY(unionfs_node_status) uns_list; /* Status list */ pid_t uns_pid; /* current process id */ int uns_node_flag; /* uns flag */ int uns_lower_opencnt; /* open count of lower */ int uns_upper_opencnt; /* open count of upper */ int uns_lower_openmode; /* open mode of lower */ int uns_readdir_status; /* read status of readdir */ }; /* union node status flags */ #define UNS_OPENL_4_READDIR 0x01 /* open lower layer for readdir */ /* A cache of vnode references */ struct unionfs_node { struct vnode *un_lowervp; /* lower side vnode */ struct vnode *un_uppervp; /* upper side vnode */ struct vnode *un_dvp; /* parent unionfs vnode */ struct vnode *un_vnode; /* Back pointer */ LIST_HEAD(, unionfs_node_status) un_unshead; /* unionfs status head */ LIST_HEAD(unionfs_node_hashhead, unionfs_node) *un_hashtbl; /* dir vnode hash table */ LIST_ENTRY(unionfs_node) un_hash; /* hash list entry */ u_long un_hashmask; /* bit mask */ char *un_path; /* path */ int un_flag; /* unionfs node flag */ }; /* * unionfs node flags * It needs the vnode with exclusive lock, when changing the un_flag variable. */ #define UNIONFS_OPENEXTL 0x01 /* openextattr (lower) */ #define UNIONFS_OPENEXTU 0x02 /* openextattr (upper) */ #define MOUNTTOUNIONFSMOUNT(mp) ((struct unionfs_mount *)((mp)->mnt_data)) #define VTOUNIONFS(vp) ((struct unionfs_node *)(vp)->v_data) #define UNIONFSTOV(xp) ((xp)->un_vnode) int unionfs_init(struct vfsconf *vfsp); int unionfs_uninit(struct vfsconf *vfsp); int unionfs_nodeget(struct mount *mp, struct vnode *uppervp, struct vnode *lowervp, struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct thread *td); void unionfs_noderem(struct vnode *vp, struct thread *td); void unionfs_get_node_status(struct unionfs_node *unp, struct thread *td, struct unionfs_node_status **unspp); void unionfs_tryrem_node_status(struct unionfs_node *unp, struct unionfs_node_status *unsp); int unionfs_check_rmdir(struct vnode *vp, struct ucred *cred, struct thread *td); int unionfs_copyfile(struct unionfs_node *unp, int docopy, struct ucred *cred, struct thread *td); void unionfs_create_uppervattr_core(struct unionfs_mount *ump, struct vattr *lva, struct vattr *uva, struct thread *td); int unionfs_create_uppervattr(struct unionfs_mount *ump, struct vnode *lvp, struct vattr *uva, struct ucred *cred, struct thread *td); int unionfs_mkshadowdir(struct unionfs_mount *ump, struct vnode *duvp, struct unionfs_node *unp, struct componentname *cnp, struct thread *td); int unionfs_mkwhiteout(struct vnode *dvp, struct componentname *cnp, struct thread *td, char *path); int unionfs_relookup(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct componentname *cn, struct thread *td, char *path, int pathlen, u_long nameiop); int unionfs_relookup_for_create(struct vnode *dvp, struct componentname *cnp, struct thread *td); int unionfs_relookup_for_delete(struct vnode *dvp, struct componentname *cnp, struct thread *td); int unionfs_relookup_for_rename(struct vnode *dvp, struct componentname *cnp, struct thread *td); #ifdef DIAGNOSTIC struct vnode *unionfs_checklowervp(struct vnode *vp, char *fil, int lno); struct vnode *unionfs_checkuppervp(struct vnode *vp, char *fil, int lno); #define UNIONFSVPTOLOWERVP(vp) unionfs_checklowervp((vp), __FILE__, __LINE__) #define UNIONFSVPTOUPPERVP(vp) unionfs_checkuppervp((vp), __FILE__, __LINE__) #else #define UNIONFSVPTOLOWERVP(vp) (VTOUNIONFS(vp)->un_lowervp) #define UNIONFSVPTOUPPERVP(vp) (VTOUNIONFS(vp)->un_uppervp) #endif extern struct vop_vector unionfs_vnodeops; #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_UNIONFSNODE); MALLOC_DECLARE(M_UNIONFSPATH); #endif #ifdef UNIONFS_DEBUG #define UNIONFSDEBUG(format, args...) printf(format ,## args) #else #define UNIONFSDEBUG(format, args...) #endif /* UNIONFS_DEBUG */ #endif /* _KERNEL */
Upload File
Create Folder