/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The 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.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
#define __UNION_UNION_H__
#include <sys/appleapiopts.h>
+#include <sys/cdefs.h>
#ifdef __APPLE_API_PRIVATE
struct union_args {
int mntflags; /* Options on the mount */
};
-#define UNMNT_ABOVE 0x0001 /* Target appears below mount point */
+#define UNMNT_ABOVE 0x0001 /* Target appears above mount point */
#define UNMNT_BELOW 0x0002 /* Target appears below mount point */
#define UNMNT_REPLACE 0x0003 /* Target replaces mount point */
+#ifdef FAULTFS
+#define UNMNT_FAULTIN 0x0004 /* get the files to TOT on lookup */
+#define UNMNT_OPMASK 0x0007
+#else
#define UNMNT_OPMASK 0x0003
+#endif
+
+#ifdef BSD_KERNEL_PRIVATE
struct union_mount {
- struct vnode *um_uppervp;
- struct vnode *um_lowervp;
- struct ucred *um_cred; /* Credentials of user calling mount */
+ struct vnode *um_uppervp; /* */
+ int um_uppervid; /* vid of upper vnode */
+ struct vnode *um_lowervp; /* Left unlocked */
+ int um_lowervid; /* vid of lower vnode */
+ kauth_cred_t um_cred; /* Credentials of user calling mount */
int um_cmode; /* cmask from mount process */
int um_op; /* Operation mode */
+ dev_t um_upperdev; /* Upper root node fsid[0]*/
};
-#ifdef KERNEL
+
+#define UNION_ABOVE(x) (x->um_op == UNMNT_ABOVE)
+#define UNION_LOWER(x) (x->um_op == UNMNT_BELOW)
+#define UNION_REPLACE(x) (x->um_op == UNMNT_REPLACE)
+#ifdef FAULTFS
+#define UNION_FAULTIN(x) (x->um_op == UNMNT_FAULTIN)
+#else
+#define UNION_FAULTIN(x) (0)
+
+#endif
+
+/* LP64 version of union_args. all pointers
+ * grow when we're dealing with a 64-bit process.
+ * WARNING - keep in sync with union_args
+ */
+
+struct user_union_args {
+ user_addr_t target; /* Target of loopback */
+ int mntflags; /* Options on the mount */
+ char _pad[4];
+};
/*
* DEFDIRMODE is the mode bits used to create a shadow directory.
struct union_node {
LIST_ENTRY(union_node) un_cache; /* Hash chain */
struct vnode *un_vnode; /* Back pointer */
+
struct vnode *un_uppervp; /* overlaying object */
+ int un_uppervid; /* vid of upper vnode */
+ off_t un_uppersz; /* size of upper object */
+
struct vnode *un_lowervp; /* underlying object */
+ int un_lowervid; /* vid of upper vnode */
+ off_t un_lowersz; /* size of lower object */
+
struct vnode *un_dirvp; /* Parent dir of uppervp */
struct vnode *un_pvp; /* Parent vnode */
+
char *un_path; /* saved component name */
int un_hash; /* saved un_path hash value */
int un_openl; /* # of opens on lowervp */
+ int un_exclcnt; /* exclusive count */
unsigned int un_flags;
+ mount_t un_mount;
struct vnode **un_dircache; /* cached union stack */
- off_t un_uppersz; /* size of upper object */
- off_t un_lowersz; /* size of lower object */
-#if DIAGNOSTIC
- pid_t un_pid;
-#endif
};
-#define UN_WANT 0x01
-#define UN_LOCKED 0x02
-#define UN_ULOCK 0x04 /* Upper node is locked */
-#define UN_KLOCK 0x08 /* Keep upper node locked on vput */
-#define UN_CACHED 0x10 /* In union cache */
+#define UN_WANT 0x01 /* union node is needed */
+#define UN_LOCKED 0x02 /* union node is locked */
+#define UN_CACHED 0x04 /* In union cache */
+#define UN_TRANSIT 0x08 /* The union node is in creation */
+#define UN_DELETED 0x10 /* The union node is deleted */
+#ifdef FAULTFS
+#define UN_FAULTFS 0x80 /* The union node is for faultfs */
+#endif
+#define UN_DIRENVN 0x100 /* The union node is created for dir enumeration */
+
-extern int union_allocvp __P((struct vnode **, struct mount *,
- struct vnode *, struct vnode *,
- struct componentname *, struct vnode *,
- struct vnode *, int));
-extern int union_copyfile __P((struct vnode *, struct vnode *,
- struct ucred *, struct proc *));
-extern int union_copyup __P((struct union_node *, int, struct ucred *,
- struct proc *));
-extern int union_dowhiteout __P((struct union_node *, struct ucred *,
- struct proc *));
-extern int union_mkshadow __P((struct union_mount *, struct vnode *,
- struct componentname *, struct vnode **));
-extern int union_mkwhiteout __P((struct union_mount *, struct vnode *,
- struct componentname *, char *));
-extern int union_vn_create __P((struct vnode **, struct union_node *,
- struct proc *));
-extern int union_cn_close __P((struct vnode *, int, struct ucred *,
- struct proc *));
-extern void union_removed_upper __P((struct union_node *un));
-extern struct vnode *union_lowervp __P((struct vnode *));
-extern void union_newlower __P((struct union_node *, struct vnode *));
-extern void union_newupper __P((struct union_node *, struct vnode *));
-extern void union_newsize __P((struct vnode *, off_t, off_t));
+#ifdef FAULTFS
+#define UNNODE_FAULTIN(x) ((x->un_flags & UN_FAULTFS)== UN_FAULTFS)
+#else
+#define UNNODE_FAULTIN(x) (0)
+#endif
+/*
+ * Hash table locking flags
+ */
+
+#define UNVP_WANT 0x01
+#define UNVP_LOCKED 0x02
#define MOUNTTOUNIONMOUNT(mp) ((struct union_mount *)((mp)->mnt_data))
#define VTOUNION(vp) ((struct union_node *)(vp)->v_data)
#define UPPERVP(vp) (VTOUNION(vp)->un_uppervp)
#define OTHERVP(vp) (UPPERVP(vp) ? UPPERVP(vp) : LOWERVP(vp))
+
+extern int union_allocvp(struct vnode **, struct mount *,
+ struct vnode *, struct vnode *,
+ struct componentname *, struct vnode *,
+ struct vnode *, int);
+extern int union_freevp(struct vnode *);
+extern struct vnode * union_dircache(struct vnode *, vfs_context_t);
+extern int union_copyfile(struct vnode *, struct vnode *,vfs_context_t );
+extern int union_copyup(struct union_node *, int, vfs_context_t );
+extern int union_dowhiteout(struct union_node *, vfs_context_t);
+extern int union_mkshadow(struct union_mount *, struct vnode *,
+ struct componentname *, struct vnode **);
+extern int union_mkwhiteout(struct union_mount *, struct vnode *,
+ struct componentname *, char *);
+extern int union_vn_create(struct vnode **, struct union_node *, mode_t mode, vfs_context_t context);
+extern int union_cn_close(struct vnode *, int, vfs_context_t context);
+extern void union_removed_upper(struct union_node *un);
+extern struct vnode *union_lowervp(struct vnode *);
+extern void union_newsize(struct vnode *, off_t, off_t);
+extern int union_init(struct vfsconf *);
+extern void union_updatevp(struct union_node *, struct vnode *, struct vnode *);
+extern void union_dircache_free(struct union_node *);
+extern int (*union_dircheckp)(struct vnode **, struct fileproc *, vfs_context_t);
+extern int union_faultin_copyup(struct vnode ** uvpp, vnode_t udvp, vnode_t lvp, struct componentname * cnp, vfs_context_t context);
extern int (**union_vnodeop_p)(void *);
extern struct vfsops union_vfsops;
-#endif /* KERNEL */
+void union_lock(void);
+void union_unlock(void);
+
+#endif /* BSD_KERNEL_PRIVATE */
#endif /* __APPLE_API_PRIVATE */
+
#endif /* __UNION_UNION_H__ */
projects / apple / xnu.git / blobdiff