71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
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/*
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* Copyright (c) 2015 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 SYS_DOC_TOMBSTONE_H_
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#define SYS_DOC_TOMBSTONE_H_
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#include <sys/types.h>
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#include <stdbool.h>
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#ifdef KERNEL_PRIVATE
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/*
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* struct representing a document "tombstone" that's recorded
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* when a thread manipulates files marked with a document-id.
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* if the thread recreates the same item, this tombstone is
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* used to preserve the document_id on the new file.
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*
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* It is a separate structure because of its size - we want to
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* allocate it on demand instead of just stuffing it into the
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* uthread structure.
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*/
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struct doc_tombstone {
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struct vnode *t_lastop_parent;
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struct vnode *t_lastop_item;
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uint32_t t_lastop_parent_vid;
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uint32_t t_lastop_item_vid;
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uint64_t t_lastop_fileid;
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uint64_t t_lastop_document_id;
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unsigned char t_lastop_filename[NAME_MAX + 1];
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};
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struct componentname;
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struct doc_tombstone *doc_tombstone_get(void);
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void doc_tombstone_clear(struct doc_tombstone *ut, struct vnode **old_vpp);
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void doc_tombstone_save(struct vnode *dvp, struct vnode *vp,
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struct componentname *cnp, uint64_t doc_id,
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ino64_t file_id);
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bool doc_tombstone_should_ignore_name(const char *nameptr, int len);
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bool doc_tombstone_should_save(struct doc_tombstone *ut, struct vnode *vp,
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struct componentname *cnp);
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#endif // defined(KERNEL_PRIVATE)
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#endif // SYS_DOC_TOMBSTONE_H_
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