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