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Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -07001/*
2 * linux/fs/9p/vfs_dir.c
3 *
4 * This file contains vfs directory 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 Hensbergen42e8c502006-03-25 03:07:28 -080010 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070012 *
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/stat.h>
31#include <linux/string.h>
Al Viro914e2632006-10-18 13:55:46 -040032#include <linux/sched.h>
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070033#include <linux/inet.h>
34#include <linux/idr.h>
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050035#include <net/9p/9p.h>
36#include <net/9p/client.h>
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070037
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070038#include "v9fs.h"
Latchesar Ionkov531b1092006-01-08 01:05:00 -080039#include "v9fs_vfs.h"
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070040#include "fid.h"
41
42/**
43 * dt_type - return file type
44 * @mistat: mistat structure
45 *
46 */
47
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050048static inline int dt_type(struct p9_stat *mistat)
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070049{
50 unsigned long perm = mistat->mode;
51 int rettype = DT_REG;
52
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050053 if (perm & P9_DMDIR)
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070054 rettype = DT_DIR;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050055 if (perm & P9_DMSYMLINK)
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070056 rettype = DT_LNK;
57
58 return rettype;
59}
60
61/**
62 * v9fs_dir_readdir - read a directory
Eric Van Hensbergenee443992008-03-05 07:08:09 -060063 * @filp: opened file structure
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070064 * @dirent: directory structure ???
65 * @filldir: function to populate directory structure ???
66 *
67 */
68
69static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
70{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050071 int over;
72 struct p9_fid *fid;
73 struct v9fs_session_info *v9ses;
74 struct inode *inode;
75 struct p9_stat *st;
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070076
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050077 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
78 inode = filp->f_path.dentry->d_inode;
79 v9ses = v9fs_inode2v9ses(inode);
80 fid = filp->private_data;
81 while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
82 if (IS_ERR(st))
83 return PTR_ERR(st);
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070084
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050085 over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
86 v9fs_qid2ino(&st->qid), dt_type(st));
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070087
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050088 if (over)
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070089 break;
90
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050091 filp->f_pos += st->size;
92 kfree(st);
93 st = NULL;
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070094 }
95
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050096 kfree(st);
97 return 0;
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -070098}
99
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500100
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -0700101/**
102 * v9fs_dir_release - close a directory
103 * @inode: inode of the directory
104 * @filp: file pointer to a directory
105 *
106 */
107
108int v9fs_dir_release(struct inode *inode, struct file *filp)
109{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500110 struct p9_fid *fid;
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -0700111
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500112 fid = filp->private_data;
113 P9_DPRINTK(P9_DEBUG_VFS,
114 "inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800115 filemap_write_and_wait(inode->i_mapping);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500116 p9_client_clunk(fid);
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -0700117 return 0;
118}
119
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800120const struct file_operations v9fs_dir_operations = {
Eric Van Hensbergene69e7fe2005-09-09 13:04:18 -0700121 .read = generic_read_dir,
122 .readdir = v9fs_dir_readdir,
123 .open = v9fs_file_open,
124 .release = v9fs_dir_release,
125};