49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/*
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* V9FS FID Management
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*
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* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/list.h>
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/**
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* struct v9fs_dentry - 9p private data stored in dentry d_fsdata
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* @lock: protects the fidlist
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* @fidlist: list of FIDs currently associated with this dentry
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*
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* This structure defines the 9p private data associated with
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* a particular dentry. In particular, this private data is used
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* to lookup which 9P FID handle should be used for a particular VFS
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* operation. FID handles are associated with dentries instead of
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* inodes in order to more closely map functionality to the Plan 9
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* expected behavior for FID reclaimation and tracking.
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*
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* See Also: Mapping FIDs to Linux VFS model in
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* Design and Implementation of the Linux 9P File System documentation
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*/
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struct v9fs_dentry {
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spinlock_t lock; /* protect fidlist */
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struct list_head fidlist;
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};
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struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
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struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
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int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
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struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
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