mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-27 11:55:06 +00:00
1e5da15a63
PR: 118346 Submitted by: Masanori OZAWA <ozawa@ongs.co.jp> Discussed at: devsummit Strassburg, EuroBSDCon2008 Discussed with: rwatson, gnn, hrs MFC after: 2 week
149 lines
6.4 KiB
C
149 lines
6.4 KiB
C
/*-
|
|
* 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.
|
|
* 4. 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 */
|