86 lines
3.5 KiB
C
86 lines
3.5 KiB
C
/*
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* Copyright (c) 2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef MOCKFS_FSNODE_H
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#define MOCKFS_FSNODE_H
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#if MOCKFS
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#include <sys/kernel_types.h>
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/*
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* Types for the filesystem nodes; for the moment, these will effectively serve as unique
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* identifiers. This can be generalized later, but at least for the moment, the read-only
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* nature of the filesystem and the terse semantics (you have VDIR and VREG, and VREG
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* always represents the entire backing device) makes this sufficient for now.
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*
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* TODO: Should this include MOCKFS_SBIN? Right now we tell lookup that when looking in
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* MOCKFS_ROOT, "sbin" resolves back onto MOCKFS_ROOT; this is a handy hack for aliasing,
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* but may not mesh well with VFS.
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*/
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enum mockfs_fsnode_type {
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MOCKFS_ROOT,
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MOCKFS_DEV,
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MOCKFS_FILE
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};
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/*
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* For the moment, pretend everything is a directory with support for two entries; the
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* executable binary is a one-to-one mapping with the backing devnode, so this may
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* actually be all we're interested in.
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*
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* Stash the filesize in here too (this is easier then looking at the devnode for every
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* VREG access).
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*/
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struct mockfs_fsnode {
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uint64_t size; /* Bytes of data; 0 unless type is MOCKFS_FILE */
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uint8_t type; /* Serves as a unique identifier for now */
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mount_t mnt; /* The mount that this node belongs to */
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vnode_t vp; /* vnode for this node (if one exists) */
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struct mockfs_fsnode * parent; /* Parent of this node (NULL for root) */
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/* TODO: Replace child_a/child_b with something more flexible */
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struct mockfs_fsnode * child_a; /* TEMPORARY */
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struct mockfs_fsnode * child_b; /* TEMPORARY */
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};
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typedef struct mockfs_fsnode * mockfs_fsnode_t;
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/*
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* See mockfs_fsnode.c for function details.
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*/
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int mockfs_fsnode_create(mount_t mp, uint8_t type, mockfs_fsnode_t * fsnpp);
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int mockfs_fsnode_destroy(mockfs_fsnode_t fsnp);
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int mockfs_fsnode_adopt(mockfs_fsnode_t parent, mockfs_fsnode_t child);
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int mockfs_fsnode_orphan(mockfs_fsnode_t fsnp);
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int mockfs_fsnode_child_by_type(mockfs_fsnode_t parent, uint8_t type, mockfs_fsnode_t * child);
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int mockfs_fsnode_vnode(mockfs_fsnode_t fsnp, vnode_t * vpp);
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int mockfs_fsnode_drop_vnode(mockfs_fsnode_t fsnp);
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#endif /* MOCKFS */
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#endif /* MOCKFS_FSNODE_H */
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