Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 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 |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 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> |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 33 | #include <linux/inet.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/idr.h> |
| 36 | |
| 37 | #include "debug.h" |
| 38 | #include "v9fs.h" |
| 39 | #include "9p.h" |
| 40 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 41 | #include "fid.h" |
| 42 | |
| 43 | /** |
Eric Van Hensbergen | 46f6dac | 2006-03-02 02:54:33 -0800 | [diff] [blame] | 44 | * v9fs_dentry_delete - called when dentry refcount equals 0 |
| 45 | * @dentry: dentry in question |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 46 | * |
Eric Van Hensbergen | 46f6dac | 2006-03-02 02:54:33 -0800 | [diff] [blame] | 47 | * By returning 1 here we should remove cacheing of unused |
| 48 | * dentry components. |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 49 | * |
| 50 | */ |
| 51 | |
Latchesar Ionkov | 5174fda | 2006-03-25 03:07:25 -0800 | [diff] [blame] | 52 | static int v9fs_dentry_delete(struct dentry *dentry) |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 53 | { |
Eric Van Hensbergen | 46f6dac | 2006-03-02 02:54:33 -0800 | [diff] [blame] | 54 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 55 | |
Eric Van Hensbergen | 46f6dac | 2006-03-02 02:54:33 -0800 | [diff] [blame] | 56 | return 1; |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | /** |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 60 | * v9fs_cached_dentry_delete - called when dentry refcount equals 0 |
| 61 | * @dentry: dentry in question |
| 62 | * |
| 63 | * Only return 1 if our inode is invalid. Only non-synthetic files |
| 64 | * (ones without mtime == 0) should be calling this function. |
| 65 | * |
| 66 | */ |
| 67 | |
| 68 | static int v9fs_cached_dentry_delete(struct dentry *dentry) |
| 69 | { |
| 70 | struct inode *inode = dentry->d_inode; |
| 71 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); |
| 72 | |
| 73 | if(!inode) |
| 74 | return 1; |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | /** |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 80 | * v9fs_dentry_release - called when dentry is going to be freed |
| 81 | * @dentry: dentry that is being release |
| 82 | * |
| 83 | */ |
| 84 | |
| 85 | void v9fs_dentry_release(struct dentry *dentry) |
| 86 | { |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 87 | int err; |
| 88 | |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 89 | dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); |
| 90 | |
| 91 | if (dentry->d_fsdata != NULL) { |
| 92 | struct list_head *fid_list = dentry->d_fsdata; |
| 93 | struct v9fs_fid *temp = NULL; |
| 94 | struct v9fs_fid *current_fid = NULL; |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 95 | |
| 96 | list_for_each_entry_safe(current_fid, temp, fid_list, list) { |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 97 | err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid); |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 98 | |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 99 | if (err < 0) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 100 | dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n", |
| 101 | err, dentry->d_iname); |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 102 | |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 103 | v9fs_fid_destroy(current_fid); |
| 104 | } |
| 105 | |
| 106 | kfree(dentry->d_fsdata); /* free the list_head */ |
| 107 | } |
| 108 | } |
| 109 | |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 110 | struct dentry_operations v9fs_cached_dentry_operations = { |
| 111 | .d_delete = v9fs_cached_dentry_delete, |
| 112 | .d_release = v9fs_dentry_release, |
| 113 | }; |
| 114 | |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 115 | struct dentry_operations v9fs_dentry_operations = { |
Eric Van Hensbergen | 46f6dac | 2006-03-02 02:54:33 -0800 | [diff] [blame] | 116 | .d_delete = v9fs_dentry_delete, |
Eric Van Hensbergen | e69e7fe | 2005-09-09 13:04:18 -0700 | [diff] [blame] | 117 | .d_release = v9fs_dentry_release, |
| 118 | }; |