| /* |
| * 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 |
| * |
| */ |
| #ifndef FS_9P_FID_H |
| #define FS_9P_FID_H |
| #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); |
| struct p9_fid *v9fs_writeback_fid(struct dentry *dentry); |
| #endif |