/* * linux/fs/9p/vfs_dentry.c * * This file contians vfs dentry ops for the 9P2000 protocol. * * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> * * 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/module.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/file.h> #include <linux/pagemap.h> #include <linux/stat.h> #include <linux/string.h> #include <linux/smp_lock.h> #include <linux/inet.h> #include <linux/namei.h> #include <linux/idr.h> #include "debug.h" #include "v9fs.h" #include "9p.h" #include "v9fs_vfs.h" #include "fid.h" /** * v9fs_dentry_delete - called when dentry refcount equals 0 * @dentry: dentry in question * * By returning 1 here we should remove cacheing of unused * dentry components. * */ static int v9fs_dentry_delete(struct dentry *dentry) { dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); return 1; } /** * v9fs_cached_dentry_delete - called when dentry refcount equals 0 * @dentry: dentry in question * * Only return 1 if our inode is invalid. Only non-synthetic files * (ones without mtime == 0) should be calling this function. * */ static int v9fs_cached_dentry_delete(struct dentry *dentry) { struct inode *inode = dentry->d_inode; dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); if(!inode) return 1; return 0; } /** * v9fs_dentry_release - called when dentry is going to be freed * @dentry: dentry that is being release * */ void v9fs_dentry_release(struct dentry *dentry) { int err; dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); if (dentry->d_fsdata != NULL) { struct list_head *fid_list = dentry->d_fsdata; struct v9fs_fid *temp = NULL; struct v9fs_fid *current_fid = NULL; list_for_each_entry_safe(current_fid, temp, fid_list, list) { err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid); if (err < 0) dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n", err, dentry->d_iname); v9fs_fid_destroy(current_fid); } kfree(dentry->d_fsdata); /* free the list_head */ } } struct dentry_operations v9fs_cached_dentry_operations = { .d_delete = v9fs_cached_dentry_delete, .d_release = v9fs_dentry_release, }; struct dentry_operations v9fs_dentry_operations = { .d_delete = v9fs_dentry_delete, .d_release = v9fs_dentry_release, };