1 /* 2 * linux/fs/9p/vfs_dentry.c 3 * 4 * This file contians vfs dentry ops for the 9P2000 protocol. 5 * 6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> 7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 11 * as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to: 20 * Free Software Foundation 21 * 51 Franklin Street, Fifth Floor 22 * Boston, MA 02111-1301 USA 23 * 24 */ 25 26 #include <linux/module.h> 27 #include <linux/errno.h> 28 #include <linux/fs.h> 29 #include <linux/file.h> 30 #include <linux/pagemap.h> 31 #include <linux/stat.h> 32 #include <linux/string.h> 33 #include <linux/smp_lock.h> 34 #include <linux/inet.h> 35 #include <linux/namei.h> 36 #include <linux/idr.h> 37 38 #include "debug.h" 39 #include "v9fs.h" 40 #include "9p.h" 41 #include "v9fs_vfs.h" 42 #include "fid.h" 43 44 /** 45 * v9fs_dentry_delete - called when dentry refcount equals 0 46 * @dentry: dentry in question 47 * 48 * By returning 1 here we should remove cacheing of unused 49 * dentry components. 50 * 51 */ 52 53 static int v9fs_dentry_delete(struct dentry *dentry) 54 { 55 dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 56 return 1; 57 } 58 59 /** 60 * v9fs_dentry_release - called when dentry is going to be freed 61 * @dentry: dentry that is being release 62 * 63 */ 64 65 void v9fs_dentry_release(struct dentry *dentry) 66 { 67 int err; 68 69 dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); 70 71 if (dentry->d_fsdata != NULL) { 72 struct list_head *fid_list = dentry->d_fsdata; 73 struct v9fs_fid *temp = NULL; 74 struct v9fs_fid *current_fid = NULL; 75 76 list_for_each_entry_safe(current_fid, temp, fid_list, list) { 77 err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid); 78 79 if (err < 0) 80 dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n", 81 err, dentry->d_iname); 82 83 v9fs_fid_destroy(current_fid); 84 } 85 86 kfree(dentry->d_fsdata); /* free the list_head */ 87 } 88 } 89 90 struct dentry_operations v9fs_dentry_operations = { 91 .d_delete = v9fs_dentry_delete, 92 .d_release = v9fs_dentry_release, 93 }; 94