blob: 890bed538f9b6417aebbb1e5a2780c0f209ebd17 [file] [log] [blame]
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001/*
2 * linux/fs/9p/vfs_inode.c
3 *
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07004 * This file contains vfs inode ops for the 9P2000 protocol.
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07005 *
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 Hensbergen2bad8472005-09-09 13:04:19 -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
Joe Perches5d385152011-11-28 10:40:46 -080026#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070028#include <linux/module.h>
29#include <linux/errno.h>
30#include <linux/fs.h>
31#include <linux/file.h>
32#include <linux/pagemap.h>
33#include <linux/stat.h>
34#include <linux/string.h>
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070035#include <linux/inet.h>
36#include <linux/namei.h>
37#include <linux/idr.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040038#include <linux/sched.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Aneesh Kumar K.Vebf46262010-05-31 13:22:56 +053040#include <linux/xattr.h>
Aneesh Kumar K.V85ff8722010-09-28 00:27:39 +053041#include <linux/posix_acl.h>
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050042#include <net/9p/9p.h>
43#include <net/9p/client.h>
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070044
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070045#include "v9fs.h"
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070046#include "v9fs_vfs.h"
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070047#include "fid.h"
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -050048#include "cache.h"
Aneesh Kumar K.Vebf46262010-05-31 13:22:56 +053049#include "xattr.h"
Aneesh Kumar K.V85ff8722010-09-28 00:27:39 +053050#include "acl.h"
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070051
Arjan van de Ven754661f2007-02-12 00:55:38 -080052static const struct inode_operations v9fs_dir_inode_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +000053static const struct inode_operations v9fs_dir_inode_operations_dotu;
Arjan van de Ven754661f2007-02-12 00:55:38 -080054static const struct inode_operations v9fs_file_inode_operations;
55static const struct inode_operations v9fs_symlink_inode_operations;
Aneesh Kumar K.Vf5fc6142010-10-12 13:02:25 +053056
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070057/**
58 * unixmode2p9mode - convert unix mode bits to plan 9
59 * @v9ses: v9fs session information
60 * @mode: mode to convert
61 *
62 */
63
Al Viro3eda0de2011-07-26 02:53:22 -040064static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070065{
66 int res;
67 res = mode & 0777;
68 if (S_ISDIR(mode))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050069 res |= P9_DMDIR;
Sripathi Kodidd6102f2010-03-05 18:48:00 +000070 if (v9fs_proto_dotu(v9ses)) {
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070071 if (v9ses->nodev == 0) {
72 if (S_ISSOCK(mode))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050073 res |= P9_DMSOCKET;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070074 if (S_ISFIFO(mode))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050075 res |= P9_DMNAMEDPIPE;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070076 if (S_ISBLK(mode))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050077 res |= P9_DMDEVICE;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070078 if (S_ISCHR(mode))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050079 res |= P9_DMDEVICE;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070080 }
81
82 if ((mode & S_ISUID) == S_ISUID)
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050083 res |= P9_DMSETUID;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070084 if ((mode & S_ISGID) == S_ISGID)
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050085 res |= P9_DMSETGID;
Anthony Liguorid199d652008-02-06 19:25:06 -060086 if ((mode & S_ISVTX) == S_ISVTX)
87 res |= P9_DMSETVTX;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070088 }
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -070089 return res;
90}
91
92/**
Aneesh Kumar K.Vdf345c62012-01-05 13:39:49 +053093 * p9mode2perm- convert plan9 mode bits to unix permission bits
94 * @v9ses: v9fs session information
95 * @stat: p9_wstat from which mode need to be derived
96 *
97 */
98static int p9mode2perm(struct v9fs_session_info *v9ses,
99 struct p9_wstat *stat)
100{
101 int res;
102 int mode = stat->mode;
103
104 res = mode & S_IALLUGO;
105 if (v9fs_proto_dotu(v9ses)) {
106 if ((mode & P9_DMSETUID) == P9_DMSETUID)
107 res |= S_ISUID;
108
109 if ((mode & P9_DMSETGID) == P9_DMSETGID)
110 res |= S_ISGID;
111
112 if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
113 res |= S_ISVTX;
114 }
115 return res;
116}
117
118/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700119 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
120 * @v9ses: v9fs session information
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000121 * @stat: p9_wstat from which mode need to be derived
122 * @rdev: major number, minor number in case of device files.
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700123 *
124 */
Al Viro3eda0de2011-07-26 02:53:22 -0400125static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
126 struct p9_wstat *stat, dev_t *rdev)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700127{
128 int res;
Al Viro3eda0de2011-07-26 02:53:22 -0400129 u32 mode = stat->mode;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700130
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000131 *rdev = 0;
Aneesh Kumar K.Vdf345c62012-01-05 13:39:49 +0530132 res = p9mode2perm(v9ses, stat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700133
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500134 if ((mode & P9_DMDIR) == P9_DMDIR)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700135 res |= S_IFDIR;
Sripathi Kodidd6102f2010-03-05 18:48:00 +0000136 else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700137 res |= S_IFLNK;
Sripathi Kodidd6102f2010-03-05 18:48:00 +0000138 else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700139 && (v9ses->nodev == 0))
140 res |= S_IFSOCK;
Sripathi Kodidd6102f2010-03-05 18:48:00 +0000141 else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700142 && (v9ses->nodev == 0))
143 res |= S_IFIFO;
Sripathi Kodidd6102f2010-03-05 18:48:00 +0000144 else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000145 && (v9ses->nodev == 0)) {
146 char type = 0, ext[32];
147 int major = -1, minor = -1;
148
149 strncpy(ext, stat->extension, sizeof(ext));
150 sscanf(ext, "%c %u %u", &type, &major, &minor);
151 switch (type) {
152 case 'c':
153 res |= S_IFCHR;
154 break;
155 case 'b':
156 res |= S_IFBLK;
157 break;
158 default:
Joe Perches5d385152011-11-28 10:40:46 -0800159 p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n",
160 type, stat->extension);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000161 };
162 *rdev = MKDEV(major, minor);
163 } else
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700164 res |= S_IFREG;
165
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700166 return res;
167}
168
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600169/**
170 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
171 * @uflags: flags to convert
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -0500172 * @extended: if .u extensions are active
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600173 */
174
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -0500175int v9fs_uflags2omode(int uflags, int extended)
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800176{
177 int ret;
178
179 ret = 0;
180 switch (uflags&3) {
181 default:
182 case O_RDONLY:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500183 ret = P9_OREAD;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800184 break;
185
186 case O_WRONLY:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500187 ret = P9_OWRITE;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800188 break;
189
190 case O_RDWR:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500191 ret = P9_ORDWR;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800192 break;
193 }
194
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800195 if (uflags & O_TRUNC)
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500196 ret |= P9_OTRUNC;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800197
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -0500198 if (extended) {
199 if (uflags & O_EXCL)
200 ret |= P9_OEXCL;
201
202 if (uflags & O_APPEND)
203 ret |= P9_OAPPEND;
204 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800205
206 return ret;
207}
208
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700209/**
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800210 * v9fs_blank_wstat - helper function to setup a 9P stat structure
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800211 * @wstat: structure to initialize
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700212 *
213 */
214
M. Mohan Kumar7a4439c2010-02-08 15:36:48 -0600215void
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500216v9fs_blank_wstat(struct p9_wstat *wstat)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700217{
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800218 wstat->type = ~0;
219 wstat->dev = ~0;
220 wstat->qid.type = ~0;
221 wstat->qid.version = ~0;
222 *((long long *)&wstat->qid.path) = ~0;
223 wstat->mode = ~0;
224 wstat->atime = ~0;
225 wstat->mtime = ~0;
226 wstat->length = ~0;
227 wstat->name = NULL;
228 wstat->uid = NULL;
229 wstat->gid = NULL;
230 wstat->muid = NULL;
231 wstat->n_uid = ~0;
232 wstat->n_gid = ~0;
233 wstat->n_muid = ~0;
234 wstat->extension = NULL;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700235}
236
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500237/**
238 * v9fs_alloc_inode - helper function to allocate an inode
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500239 *
240 */
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500241struct inode *v9fs_alloc_inode(struct super_block *sb)
242{
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530243 struct v9fs_inode *v9inode;
244 v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
245 GFP_KERNEL);
246 if (!v9inode)
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500247 return NULL;
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530248#ifdef CONFIG_9P_FSCACHE
249 v9inode->fscache = NULL;
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530250 spin_lock_init(&v9inode->fscache_lock);
251#endif
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530252 v9inode->writeback_fid = NULL;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530253 v9inode->cache_validity = 0;
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530254 mutex_init(&v9inode->v_mutex);
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530255 return &v9inode->vfs_inode;
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500256}
257
258/**
259 * v9fs_destroy_inode - destroy an inode
260 *
261 */
262
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100263static void v9fs_i_callback(struct rcu_head *head)
264{
265 struct inode *inode = container_of(head, struct inode, i_rcu);
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530266 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100267}
268
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500269void v9fs_destroy_inode(struct inode *inode)
270{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100271 call_rcu(&inode->i_rcu, v9fs_i_callback);
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500272}
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500273
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530274int v9fs_init_inode(struct v9fs_session_info *v9ses,
Al Viro3eda0de2011-07-26 02:53:22 -0400275 struct inode *inode, umode_t mode, dev_t rdev)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700276{
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530277 int err = 0;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600278
Dmitry Monakhov217f2062010-03-04 17:30:57 +0300279 inode_init_owner(inode, NULL, mode);
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600280 inode->i_blocks = 0;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000281 inode->i_rdev = rdev;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600282 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
283 inode->i_mapping->a_ops = &v9fs_addr_operations;
284
285 switch (mode & S_IFMT) {
286 case S_IFIFO:
287 case S_IFBLK:
288 case S_IFCHR:
289 case S_IFSOCK:
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530290 if (v9fs_proto_dotl(v9ses)) {
291 inode->i_op = &v9fs_file_inode_operations_dotl;
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530292 } else if (v9fs_proto_dotu(v9ses)) {
293 inode->i_op = &v9fs_file_inode_operations;
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530294 } else {
Joe Perches5d385152011-11-28 10:40:46 -0800295 p9_debug(P9_DEBUG_ERROR,
296 "special files without extended mode\n");
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600297 err = -EINVAL;
298 goto error;
299 }
300 init_special_inode(inode, inode->i_mode, inode->i_rdev);
301 break;
302 case S_IFREG:
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000303 if (v9fs_proto_dotl(v9ses)) {
304 inode->i_op = &v9fs_file_inode_operations_dotl;
Aneesh Kumar K.V29236f42011-02-28 17:03:54 +0530305 if (v9ses->cache)
306 inode->i_fop =
307 &v9fs_cached_file_operations_dotl;
308 else
309 inode->i_fop = &v9fs_file_operations_dotl;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000310 } else {
311 inode->i_op = &v9fs_file_inode_operations;
Aneesh Kumar K.V29236f42011-02-28 17:03:54 +0530312 if (v9ses->cache)
313 inode->i_fop = &v9fs_cached_file_operations;
314 else
315 inode->i_fop = &v9fs_file_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000316 }
317
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600318 break;
319 case S_IFLNK:
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000320 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
Joe Perches5d385152011-11-28 10:40:46 -0800321 p9_debug(P9_DEBUG_ERROR,
322 "extended modes used with legacy protocol\n");
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600323 err = -EINVAL;
324 goto error;
325 }
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000326
327 if (v9fs_proto_dotl(v9ses))
328 inode->i_op = &v9fs_symlink_inode_operations_dotl;
329 else
330 inode->i_op = &v9fs_symlink_inode_operations;
331
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600332 break;
333 case S_IFDIR:
334 inc_nlink(inode);
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000335 if (v9fs_proto_dotl(v9ses))
336 inode->i_op = &v9fs_dir_inode_operations_dotl;
337 else if (v9fs_proto_dotu(v9ses))
338 inode->i_op = &v9fs_dir_inode_operations_dotu;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600339 else
340 inode->i_op = &v9fs_dir_inode_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000341
342 if (v9fs_proto_dotl(v9ses))
343 inode->i_fop = &v9fs_dir_operations_dotl;
344 else
345 inode->i_fop = &v9fs_dir_operations;
346
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600347 break;
348 default:
Linus Torvalds609eac12012-01-10 15:09:01 -0800349 p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n",
Joe Perches5d385152011-11-28 10:40:46 -0800350 mode, mode & S_IFMT);
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600351 err = -EINVAL;
352 goto error;
353 }
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600354error:
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530355 return err;
356
357}
358
359/**
360 * v9fs_get_inode - helper function to setup an inode
361 * @sb: superblock
362 * @mode: mode to setup inode with
363 *
364 */
365
Al Viro3eda0de2011-07-26 02:53:22 -0400366struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530367{
368 int err;
369 struct inode *inode;
370 struct v9fs_session_info *v9ses = sb->s_fs_info;
371
Linus Torvalds609eac12012-01-10 15:09:01 -0800372 p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530373
374 inode = new_inode(sb);
375 if (!inode) {
Joe Perches5d385152011-11-28 10:40:46 -0800376 pr_warn("%s (%d): Problem allocating inode\n",
377 __func__, task_pid_nr(current));
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530378 return ERR_PTR(-ENOMEM);
379 }
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000380 err = v9fs_init_inode(v9ses, inode, mode, rdev);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530381 if (err) {
382 iput(inode);
383 return ERR_PTR(err);
384 }
385 return inode;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700386}
387
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500388/*
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800389static struct v9fs_fid*
390v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
391{
392 int err;
Mika Kukkonen736c4b82006-12-06 20:36:29 -0800393 int nfid;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800394 struct v9fs_fid *ret;
395 struct v9fs_fcall *fcall;
396
397 nfid = v9fs_get_idpool(&v9ses->fidpool);
398 if (nfid < 0) {
399 eprintk(KERN_WARNING, "no free fids available\n");
Latchesar Ionkov731805b2006-03-07 21:55:42 -0800400 return ERR_PTR(-ENOSPC);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800401 }
402
403 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
404 &fcall);
405
406 if (err < 0) {
Latchesar Ionkov41e5a6a2006-05-15 09:44:21 -0700407 if (fcall && fcall->id == RWALK)
408 goto clunk_fid;
409
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800410 PRINT_FCALL_ERROR("walk error", fcall);
411 v9fs_put_idpool(nfid, &v9ses->fidpool);
412 goto error;
413 }
414
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700415 kfree(fcall);
Latchesar Ionkov3cf64292006-01-08 01:04:58 -0800416 fcall = NULL;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800417 ret = v9fs_fid_create(v9ses, nfid);
418 if (!ret) {
419 err = -ENOMEM;
420 goto clunk_fid;
421 }
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700422
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800423 err = v9fs_fid_insert(ret, dentry);
424 if (err < 0) {
425 v9fs_fid_destroy(ret);
426 goto clunk_fid;
Latchesar Ionkov0b8dd172005-09-27 21:45:24 -0700427 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800428
429 return ret;
430
431clunk_fid:
432 v9fs_t_clunk(v9ses, nfid);
433
434error:
435 kfree(fcall);
436 return ERR_PTR(err);
437}
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500438*/
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800439
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500440
441/**
442 * v9fs_clear_inode - release an inode
443 * @inode: inode to release
444 *
445 */
Al Virob57922d2010-06-07 14:34:48 -0400446void v9fs_evict_inode(struct inode *inode)
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500447{
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530448 struct v9fs_inode *v9inode = V9FS_I(inode);
449
Al Virob57922d2010-06-07 14:34:48 -0400450 truncate_inode_pages(inode->i_mapping, 0);
Jan Karadbd57682012-05-03 14:48:02 +0200451 clear_inode(inode);
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500452 filemap_fdatawrite(inode->i_mapping);
453
454#ifdef CONFIG_9P_FSCACHE
455 v9fs_cache_inode_put_cookie(inode);
456#endif
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530457 /* clunk the fid stashed in writeback_fid */
458 if (v9inode->writeback_fid) {
459 p9_client_clunk(v9inode->writeback_fid);
460 v9inode->writeback_fid = NULL;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530461 }
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500462}
463
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000464static int v9fs_test_inode(struct inode *inode, void *data)
465{
466 int umode;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000467 dev_t rdev;
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000468 struct v9fs_inode *v9inode = V9FS_I(inode);
469 struct p9_wstat *st = (struct p9_wstat *)data;
470 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
471
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000472 umode = p9mode2unixmode(v9ses, st, &rdev);
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000473 /* don't match inode of different type */
474 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
475 return 0;
476
477 /* compare qid details */
478 if (memcmp(&v9inode->qid.version,
479 &st->qid.version, sizeof(v9inode->qid.version)))
480 return 0;
481
482 if (v9inode->qid.type != st->qid.type)
483 return 0;
484 return 1;
485}
486
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530487static int v9fs_test_new_inode(struct inode *inode, void *data)
488{
489 return 0;
490}
491
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000492static int v9fs_set_inode(struct inode *inode, void *data)
493{
494 struct v9fs_inode *v9inode = V9FS_I(inode);
495 struct p9_wstat *st = (struct p9_wstat *)data;
496
497 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
498 return 0;
499}
500
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530501static struct inode *v9fs_qid_iget(struct super_block *sb,
502 struct p9_qid *qid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530503 struct p9_wstat *st,
504 int new)
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530505{
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000506 dev_t rdev;
Al Viro3eda0de2011-07-26 02:53:22 -0400507 int retval;
508 umode_t umode;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530509 unsigned long i_ino;
510 struct inode *inode;
511 struct v9fs_session_info *v9ses = sb->s_fs_info;
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530512 int (*test)(struct inode *, void *);
513
514 if (new)
515 test = v9fs_test_new_inode;
516 else
517 test = v9fs_test_inode;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530518
519 i_ino = v9fs_qid2ino(qid);
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530520 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530521 if (!inode)
522 return ERR_PTR(-ENOMEM);
523 if (!(inode->i_state & I_NEW))
524 return inode;
525 /*
526 * initialize the inode with the stat info
527 * FIXME!! we may need support for stale inodes
528 * later.
529 */
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000530 inode->i_ino = i_ino;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000531 umode = p9mode2unixmode(v9ses, st, &rdev);
532 retval = v9fs_init_inode(v9ses, inode, umode, rdev);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530533 if (retval)
534 goto error;
535
536 v9fs_stat2inode(st, inode, sb);
537#ifdef CONFIG_9P_FSCACHE
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530538 v9fs_cache_inode_get_cookie(inode);
539#endif
540 unlock_new_inode(inode);
541 return inode;
542error:
543 unlock_new_inode(inode);
544 iput(inode);
545 return ERR_PTR(retval);
546
547}
548
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600549struct inode *
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530550v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530551 struct super_block *sb, int new)
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800552{
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500553 struct p9_wstat *st;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530554 struct inode *inode = NULL;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800555
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500556 st = p9_client_stat(fid);
Abhishek Kulkarni02bc3562009-07-19 13:41:54 -0600557 if (IS_ERR(st))
558 return ERR_CAST(st);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800559
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530560 inode = v9fs_qid_iget(sb, &st->qid, st, new);
Abhishek Kulkarni02bc3562009-07-19 13:41:54 -0600561 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500562 kfree(st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530563 return inode;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700564}
565
566/**
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530567 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
568 * plan 9 AT flag.
569 * @flags: flags to convert
570 */
571static int v9fs_at_to_dotl_flags(int flags)
572{
573 int rflags = 0;
574 if (flags & AT_REMOVEDIR)
575 rflags |= P9_DOTL_AT_REMOVEDIR;
576 return rflags;
577}
578
579/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700580 * v9fs_remove - helper function to remove files and directories
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700581 * @dir: directory inode that is being deleted
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530582 * @dentry: dentry that is being deleted
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700583 * @rmdir: removing a directory
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700584 *
585 */
586
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530587static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700588{
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530589 struct inode *inode;
590 int retval = -EOPNOTSUPP;
591 struct p9_fid *v9fid, *dfid;
592 struct v9fs_session_info *v9ses;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700593
Joe Perches5d385152011-11-28 10:40:46 -0800594 p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
595 dir, dentry, flags);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700596
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530597 v9ses = v9fs_inode2v9ses(dir);
598 inode = dentry->d_inode;
599 dfid = v9fs_fid_lookup(dentry->d_parent);
600 if (IS_ERR(dfid)) {
601 retval = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800602 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530603 return retval;
604 }
605 if (v9fs_proto_dotl(v9ses))
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530606 retval = p9_client_unlinkat(dfid, dentry->d_name.name,
607 v9fs_at_to_dotl_flags(flags));
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530608 if (retval == -EOPNOTSUPP) {
609 /* Try the one based on path */
610 v9fid = v9fs_fid_clone(dentry);
611 if (IS_ERR(v9fid))
612 return PTR_ERR(v9fid);
613 retval = p9_client_remove(v9fid);
614 }
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530615 if (!retval) {
616 /*
617 * directories on unlink should have zero
618 * link count
619 */
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530620 if (flags & AT_REMOVEDIR) {
621 clear_nlink(inode);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530622 drop_nlink(dir);
623 } else
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530624 drop_nlink(inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530625
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530626 v9fs_invalidate_inode_attr(inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530627 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530628 }
Aneesh Kumar K.Vd994f402010-03-29 18:14:50 -0500629 return retval;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700630}
631
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500632/**
633 * v9fs_create - Create a file
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600634 * @v9ses: session information
635 * @dir: directory that dentry is being created in
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500636 * @dentry: dentry that is being created
Abhishek Kulkarni0e155972009-07-19 13:41:55 -0600637 * @extension: 9p2000.u extension string to support devices, etc.
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500638 * @perm: create permissions
639 * @mode: open mode
640 *
641 */
642static struct p9_fid *
643v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
644 struct dentry *dentry, char *extension, u32 perm, u8 mode)
645{
646 int err;
647 char *name;
648 struct p9_fid *dfid, *ofid, *fid;
649 struct inode *inode;
650
Joe Perches5d385152011-11-28 10:40:46 -0800651 p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500652
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500653 err = 0;
654 ofid = NULL;
655 fid = NULL;
656 name = (char *) dentry->d_name.name;
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000657 dfid = v9fs_fid_lookup(dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500658 if (IS_ERR(dfid)) {
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500659 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800660 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000661 return ERR_PTR(err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500662 }
663
664 /* clone a fid to use for creation */
665 ofid = p9_client_walk(dfid, 0, NULL, 1);
666 if (IS_ERR(ofid)) {
667 err = PTR_ERR(ofid);
Joe Perches5d385152011-11-28 10:40:46 -0800668 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000669 return ERR_PTR(err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500670 }
671
672 err = p9_client_fcreate(ofid, name, perm, mode, extension);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500673 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800674 p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500675 goto error;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500676 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500677
Aneesh Kumar K.Vb6054792012-01-05 10:42:17 -0600678 if (!(perm & P9_DMLINK)) {
679 /* now walk from the parent so we can get unopened fid */
680 fid = p9_client_walk(dfid, 1, &name, 1);
681 if (IS_ERR(fid)) {
682 err = PTR_ERR(fid);
683 p9_debug(P9_DEBUG_VFS,
684 "p9_client_walk failed %d\n", err);
685 fid = NULL;
686 goto error;
687 }
688 /*
689 * instantiate inode and assign the unopened fid to the dentry
690 */
691 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
692 if (IS_ERR(inode)) {
693 err = PTR_ERR(inode);
694 p9_debug(P9_DEBUG_VFS,
695 "inode creation failed %d\n", err);
696 goto error;
697 }
698 err = v9fs_fid_add(dentry, fid);
699 if (err < 0)
700 goto error;
701 d_instantiate(dentry, inode);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000702 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500703 return ofid;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500704error:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500705 if (ofid)
706 p9_client_clunk(ofid);
707
708 if (fid)
709 p9_client_clunk(fid);
710
711 return ERR_PTR(err);
712}
713
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700714/**
Miklos Szeredie43ae792012-06-05 15:10:26 +0200715 * v9fs_vfs_create - VFS hook to create a regular file
716 *
717 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called
718 * for mknod(2).
719 *
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600720 * @dir: directory inode that is being created
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700721 * @dentry: dentry that is being deleted
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800722 * @mode: create permissions
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700723 *
724 */
725
726static int
Al Viro4acdaf22011-07-26 01:42:34 -0400727v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400728 bool excl)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700729{
Miklos Szeredie43ae792012-06-05 15:10:26 +0200730 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
731 u32 perm = unixmode2p9mode(v9ses, mode);
732 struct p9_fid *fid;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800733
Miklos Szeredie43ae792012-06-05 15:10:26 +0200734 /* P9_OEXCL? */
735 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
736 if (IS_ERR(fid))
737 return PTR_ERR(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800738
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530739 v9fs_invalidate_inode_attr(dir);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200740 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800741
742 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700743}
744
745/**
746 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600747 * @dir: inode that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700748 * @dentry: dentry that is being unlinked
749 * @mode: mode for new directory
750 *
751 */
752
Al Viro18bb1db2011-07-26 01:41:39 -0400753static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700754{
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800755 int err;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500756 u32 perm;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500757 struct p9_fid *fid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530758 struct v9fs_session_info *v9ses;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800759
Joe Perches5d385152011-11-28 10:40:46 -0800760 p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500761 err = 0;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800762 v9ses = v9fs_inode2v9ses(dir);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800763 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500764 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
765 if (IS_ERR(fid)) {
766 err = PTR_ERR(fid);
767 fid = NULL;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530768 } else {
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530769 inc_nlink(dir);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530770 v9fs_invalidate_inode_attr(dir);
771 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800772
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500773 if (fid)
774 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800775
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800776 return err;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700777}
778
779/**
780 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
781 * @dir: inode that is being walked from
782 * @dentry: dentry that is being walked to?
783 * @nameidata: path data
784 *
785 */
786
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600787struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400788 unsigned int flags)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700789{
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530790 struct dentry *res;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700791 struct super_block *sb;
792 struct v9fs_session_info *v9ses;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500793 struct p9_fid *dfid, *fid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700794 struct inode *inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500795 char *name;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700796 int result = 0;
797
Al Viro00cd8dd2012-06-10 17:13:09 -0400798 p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
799 dir, dentry->d_name.name, dentry, flags);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700800
Sripathi Kodi11e9b492010-03-29 18:13:59 -0500801 if (dentry->d_name.len > NAME_MAX)
802 return ERR_PTR(-ENAMETOOLONG);
803
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700804 sb = dir->i_sb;
805 v9ses = v9fs_inode2v9ses(dir);
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +0530806 /* We can walk d_parent because we hold the dir->i_mutex */
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500807 dfid = v9fs_fid_lookup(dentry->d_parent);
808 if (IS_ERR(dfid))
David Howellse231c2e2008-02-07 00:15:26 -0800809 return ERR_CAST(dfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700810
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500811 name = (char *) dentry->d_name.name;
812 fid = p9_client_walk(dfid, 1, &name, 1);
813 if (IS_ERR(fid)) {
814 result = PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700815 if (result == -ENOENT) {
Aneesh Kumar K.V85e0df22010-05-14 13:04:39 +0000816 inode = NULL;
817 goto inst_out;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700818 }
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700819
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500820 return ERR_PTR(result);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700821 }
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530822 /*
823 * Make sure we don't use a wrong inode due to parallel
824 * unlink. For cached mode create calls request for new
825 * inode. But with cache disabled, lookup should do this.
826 */
827 if (v9ses->cache)
828 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
829 else
830 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500831 if (IS_ERR(inode)) {
832 result = PTR_ERR(inode);
833 inode = NULL;
834 goto error;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700835 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500836 result = v9fs_fid_add(dentry, fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800837 if (result < 0)
Aneesh Kumar K.V9856af82010-09-22 12:24:23 +0530838 goto error_iput;
Aneesh Kumar K.V85e0df22010-05-14 13:04:39 +0000839inst_out:
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530840 /*
841 * If we had a rename on the server and a parallel lookup
842 * for the new name, then make sure we instantiate with
843 * the new name. ie look up for a/b, while on server somebody
844 * moved b under k and client parallely did a lookup for
845 * k/b.
846 */
847 res = d_materialise_unique(dentry, inode);
848 if (!IS_ERR(res))
849 return res;
850 result = PTR_ERR(res);
Aneesh Kumar K.V9856af82010-09-22 12:24:23 +0530851error_iput:
852 iput(inode);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500853error:
Julien Brunel62aa5282008-09-24 16:22:22 -0500854 p9_client_clunk(fid);
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800855
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700856 return ERR_PTR(result);
857}
858
Al Virod9585272012-06-22 12:39:14 +0400859static int
Miklos Szeredie43ae792012-06-05 15:10:26 +0200860v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400861 struct file *file, unsigned flags, umode_t mode,
Al Viro47237682012-06-10 05:01:45 -0400862 int *opened)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200863{
864 int err;
865 u32 perm;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200866 struct v9fs_inode *v9inode;
867 struct v9fs_session_info *v9ses;
868 struct p9_fid *fid, *inode_fid;
869 struct dentry *res = NULL;
870
871 if (d_unhashed(dentry)) {
Al Viro00cd8dd2012-06-10 17:13:09 -0400872 res = v9fs_vfs_lookup(dir, dentry, 0);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200873 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400874 return PTR_ERR(res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200875
876 if (res)
877 dentry = res;
878 }
879
880 /* Only creates */
Al Viroe45198a2012-06-10 06:48:09 -0400881 if (!(flags & O_CREAT) || dentry->d_inode)
882 return finish_no_open(file, res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200883
884 err = 0;
885 fid = NULL;
886 v9ses = v9fs_inode2v9ses(dir);
887 perm = unixmode2p9mode(v9ses, mode);
888 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
889 v9fs_uflags2omode(flags,
890 v9fs_proto_dotu(v9ses)));
891 if (IS_ERR(fid)) {
892 err = PTR_ERR(fid);
893 fid = NULL;
894 goto error;
895 }
896
897 v9fs_invalidate_inode_attr(dir);
898 v9inode = V9FS_I(dentry->d_inode);
899 mutex_lock(&v9inode->v_mutex);
900 if (v9ses->cache && !v9inode->writeback_fid &&
901 ((flags & O_ACCMODE) != O_RDONLY)) {
902 /*
903 * clone a fid and add it to writeback_fid
904 * we do it during open time instead of
905 * page dirty time via write_begin/page_mkwrite
906 * because we want write after unlink usecase
907 * to work.
908 */
909 inode_fid = v9fs_writeback_fid(dentry);
910 if (IS_ERR(inode_fid)) {
911 err = PTR_ERR(inode_fid);
912 mutex_unlock(&v9inode->v_mutex);
913 goto error;
914 }
915 v9inode->writeback_fid = (void *) inode_fid;
916 }
917 mutex_unlock(&v9inode->v_mutex);
Al Viro30d90492012-06-22 12:40:19 +0400918 err = finish_open(file, dentry, generic_file_open, opened);
919 if (err)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200920 goto error;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200921
Al Viro30d90492012-06-22 12:40:19 +0400922 file->private_data = fid;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200923#ifdef CONFIG_9P_FSCACHE
924 if (v9ses->cache)
Al Viro30d90492012-06-22 12:40:19 +0400925 v9fs_cache_inode_set_cookie(dentry->d_inode, file);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200926#endif
927
Al Viro47237682012-06-10 05:01:45 -0400928 *opened |= FILE_CREATED;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200929out:
930 dput(res);
Al Virod9585272012-06-22 12:39:14 +0400931 return err;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200932
933error:
934 if (fid)
935 p9_client_clunk(fid);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200936 goto out;
937}
938
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700939/**
940 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
941 * @i: inode that is being unlinked
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700942 * @d: dentry that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700943 *
944 */
945
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600946int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700947{
948 return v9fs_remove(i, d, 0);
949}
950
951/**
952 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
953 * @i: inode that is being unlinked
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700954 * @d: dentry that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700955 *
956 */
957
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600958int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700959{
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530960 return v9fs_remove(i, d, AT_REMOVEDIR);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700961}
962
963/**
964 * v9fs_vfs_rename - VFS hook to rename an inode
965 * @old_dir: old dir inode
966 * @old_dentry: old dentry
967 * @new_dir: new dir inode
968 * @new_dentry: new dentry
969 *
970 */
971
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600972int
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700973v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
974 struct inode *new_dir, struct dentry *new_dentry)
975{
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530976 int retval;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500977 struct inode *old_inode;
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530978 struct inode *new_inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500979 struct v9fs_session_info *v9ses;
980 struct p9_fid *oldfid;
981 struct p9_fid *olddirfid;
982 struct p9_fid *newdirfid;
983 struct p9_wstat wstat;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700984
Joe Perches5d385152011-11-28 10:40:46 -0800985 p9_debug(P9_DEBUG_VFS, "\n");
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500986 retval = 0;
987 old_inode = old_dentry->d_inode;
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530988 new_inode = new_dentry->d_inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500989 v9ses = v9fs_inode2v9ses(old_inode);
990 oldfid = v9fs_fid_lookup(old_dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500991 if (IS_ERR(oldfid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800992 return PTR_ERR(oldfid);
993
994 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500995 if (IS_ERR(olddirfid)) {
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800996 retval = PTR_ERR(olddirfid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500997 goto done;
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800998 }
999
1000 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001001 if (IS_ERR(newdirfid)) {
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001002 retval = PTR_ERR(newdirfid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001003 goto clunk_olddir;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001004 }
1005
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301006 down_write(&v9ses->rename_sem);
Sripathi Kodi4681dbd2010-03-25 12:47:26 +00001007 if (v9fs_proto_dotl(v9ses)) {
Aneesh Kumar K.V9e8fb382011-06-28 15:41:16 +05301008 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
1009 newdirfid, new_dentry->d_name.name);
1010 if (retval == -EOPNOTSUPP)
1011 retval = p9_client_rename(oldfid, newdirfid,
1012 new_dentry->d_name.name);
1013 if (retval != -EOPNOTSUPP)
Sripathi Kodi4681dbd2010-03-25 12:47:26 +00001014 goto clunk_newdir;
1015 }
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301016 if (old_dentry->d_parent != new_dentry->d_parent) {
1017 /*
1018 * 9P .u can only handle file rename in the same directory
1019 */
Sripathi Kodi4681dbd2010-03-25 12:47:26 +00001020
Joe Perches5d385152011-11-28 10:40:46 -08001021 p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n");
Eric Van Hensbergen621997c2007-01-26 00:57:04 -08001022 retval = -EXDEV;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001023 goto clunk_newdir;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001024 }
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001025 v9fs_blank_wstat(&wstat);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001026 wstat.muid = v9ses->uname;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001027 wstat.name = (char *) new_dentry->d_name.name;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001028 retval = p9_client_wstat(oldfid, &wstat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001029
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001030clunk_newdir:
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +05301031 if (!retval) {
1032 if (new_inode) {
1033 if (S_ISDIR(new_inode->i_mode))
1034 clear_nlink(new_inode);
1035 else
1036 drop_nlink(new_inode);
1037 }
1038 if (S_ISDIR(old_inode->i_mode)) {
1039 if (!new_inode)
1040 inc_nlink(new_dir);
1041 drop_nlink(old_dir);
1042 }
Aneesh Kumar K.V3bc86de2011-02-28 17:04:07 +05301043 v9fs_invalidate_inode_attr(old_inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301044 v9fs_invalidate_inode_attr(old_dir);
1045 v9fs_invalidate_inode_attr(new_dir);
Aneesh Kumar K.V3bc86de2011-02-28 17:04:07 +05301046
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301047 /* successful rename */
1048 d_move(old_dentry, new_dentry);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +05301049 }
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301050 up_write(&v9ses->rename_sem);
Latchesar Ionkov22150c42007-10-23 13:48:33 -05001051 p9_client_clunk(newdirfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001052
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001053clunk_olddir:
Latchesar Ionkov22150c42007-10-23 13:48:33 -05001054 p9_client_clunk(olddirfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001055
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001056done:
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001057 return retval;
1058}
1059
1060/**
Adrian Bunk943ffb52006-01-10 00:10:13 +01001061 * v9fs_vfs_getattr - retrieve file metadata
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001062 * @mnt: mount information
1063 * @dentry: file to get attributes on
1064 * @stat: metadata structure to populate
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001065 *
1066 */
1067
1068static int
1069v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1070 struct kstat *stat)
1071{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001072 int err;
1073 struct v9fs_session_info *v9ses;
1074 struct p9_fid *fid;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001075 struct p9_wstat *st;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001076
Joe Perches5d385152011-11-28 10:40:46 -08001077 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001078 err = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301079 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +05301080 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1081 generic_fillattr(dentry->d_inode, stat);
1082 return 0;
1083 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001084 fid = v9fs_fid_lookup(dentry);
1085 if (IS_ERR(fid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001086 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001087
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001088 st = p9_client_stat(fid);
1089 if (IS_ERR(st))
1090 return PTR_ERR(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001091
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001092 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001093 generic_fillattr(dentry->d_inode, stat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001094
Latchesar Ionkov62b2be52010-08-24 18:13:59 +00001095 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001096 kfree(st);
1097 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001098}
1099
1100/**
1101 * v9fs_vfs_setattr - set file metadata
1102 * @dentry: file whose metadata to set
1103 * @iattr: metadata assignment structure
1104 *
1105 */
1106
1107static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1108{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001109 int retval;
1110 struct v9fs_session_info *v9ses;
1111 struct p9_fid *fid;
1112 struct p9_wstat wstat;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001113
Joe Perches5d385152011-11-28 10:40:46 -08001114 p9_debug(P9_DEBUG_VFS, "\n");
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301115 retval = inode_change_ok(dentry->d_inode, iattr);
1116 if (retval)
1117 return retval;
1118
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001119 retval = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301120 v9ses = v9fs_dentry2v9ses(dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001121 fid = v9fs_fid_lookup(dentry);
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001122 if(IS_ERR(fid))
1123 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001124
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001125 v9fs_blank_wstat(&wstat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001126 if (iattr->ia_valid & ATTR_MODE)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001127 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001128
1129 if (iattr->ia_valid & ATTR_MTIME)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001130 wstat.mtime = iattr->ia_mtime.tv_sec;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001131
1132 if (iattr->ia_valid & ATTR_ATIME)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001133 wstat.atime = iattr->ia_atime.tv_sec;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001134
1135 if (iattr->ia_valid & ATTR_SIZE)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001136 wstat.length = iattr->ia_size;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001137
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001138 if (v9fs_proto_dotu(v9ses)) {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001139 if (iattr->ia_valid & ATTR_UID)
1140 wstat.n_uid = iattr->ia_uid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001141
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001142 if (iattr->ia_valid & ATTR_GID)
1143 wstat.n_gid = iattr->ia_gid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001144 }
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301145
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +05301146 /* Write all dirty data */
1147 if (S_ISREG(dentry->d_inode->i_mode))
1148 filemap_write_and_wait(dentry->d_inode->i_mapping);
1149
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +05301150 retval = p9_client_wstat(fid, &wstat);
1151 if (retval < 0)
1152 return retval;
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301153
1154 if ((iattr->ia_valid & ATTR_SIZE) &&
1155 iattr->ia_size != i_size_read(dentry->d_inode))
1156 truncate_setsize(dentry->d_inode, iattr->ia_size);
1157
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +05301158 v9fs_invalidate_inode_attr(dentry->d_inode);
Christoph Hellwig10257742010-06-04 11:30:02 +02001159
1160 setattr_copy(dentry->d_inode, iattr);
1161 mark_inode_dirty(dentry->d_inode);
1162 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001163}
1164
1165/**
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001166 * v9fs_stat2inode - populate an inode structure with mistat info
1167 * @stat: Plan 9 metadata (mistat) structure
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001168 * @inode: inode to populate
1169 * @sb: superblock of filesystem
1170 *
1171 */
1172
1173void
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001174v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001175 struct super_block *sb)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001176{
Al Viro3eda0de2011-07-26 02:53:22 -04001177 umode_t mode;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001178 char ext[32];
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001179 char tag_name[14];
1180 unsigned int i_nlink;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001181 struct v9fs_session_info *v9ses = sb->s_fs_info;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301182 struct v9fs_inode *v9inode = V9FS_I(inode);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001183
Miklos Szeredibfe86842011-10-28 14:13:29 +02001184 set_nlink(inode, 1);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001185
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001186 inode->i_atime.tv_sec = stat->atime;
1187 inode->i_mtime.tv_sec = stat->mtime;
1188 inode->i_ctime.tv_sec = stat->mtime;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001189
Latchesar Ionkovbd32b822007-10-17 14:31:07 -05001190 inode->i_uid = v9ses->dfltuid;
1191 inode->i_gid = v9ses->dfltgid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001192
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001193 if (v9fs_proto_dotu(v9ses)) {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001194 inode->i_uid = stat->n_uid;
1195 inode->i_gid = stat->n_gid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001196 }
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001197 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
1198 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
1199 /*
1200 * Hadlink support got added later to
1201 * to the .u extension. So there can be
1202 * server out there that doesn't support
1203 * this even with .u extension. So check
1204 * for non NULL stat->extension
1205 */
1206 strncpy(ext, stat->extension, sizeof(ext));
1207 /* HARDLINKCOUNT %u */
1208 sscanf(ext, "%13s %u", tag_name, &i_nlink);
1209 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
Miklos Szeredibfe86842011-10-28 14:13:29 +02001210 set_nlink(inode, i_nlink);
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001211 }
1212 }
Aneesh Kumar K.Vdf345c62012-01-05 13:39:49 +05301213 mode = p9mode2perm(v9ses, stat);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001214 mode |= inode->i_mode & ~S_IALLUGO;
1215 inode->i_mode = mode;
Abhishek Kulkarni7549ae32009-09-22 11:34:05 -05001216 i_size_write(inode, stat->length);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001217
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001218 /* not real number of blocks, but 512 byte ones ... */
Abhishek Kulkarni7549ae32009-09-22 11:34:05 -05001219 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301220 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001221}
1222
1223/**
1224 * v9fs_qid2ino - convert qid into inode number
1225 * @qid: qid to hash
1226 *
1227 * BUG: potential for inode number collisions?
1228 */
1229
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001230ino_t v9fs_qid2ino(struct p9_qid *qid)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001231{
1232 u64 path = qid->path + 2;
1233 ino_t i = 0;
1234
1235 if (sizeof(ino_t) == sizeof(path))
1236 memcpy(&i, &path, sizeof(ino_t));
1237 else
1238 i = (ino_t) (path ^ (path >> 32));
1239
1240 return i;
1241}
1242
1243/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001244 * v9fs_readlink - read a symlink's location (internal version)
1245 * @dentry: dentry for symlink
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001246 * @buffer: buffer to load symlink location into
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001247 * @buflen: length of buffer
1248 *
1249 */
1250
1251static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1252{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001253 int retval;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001254
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001255 struct v9fs_session_info *v9ses;
1256 struct p9_fid *fid;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001257 struct p9_wstat *st;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001258
Joe Perches5d385152011-11-28 10:40:46 -08001259 p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001260 retval = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301261 v9ses = v9fs_dentry2v9ses(dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001262 fid = v9fs_fid_lookup(dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001263 if (IS_ERR(fid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001264 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001265
M. Mohan Kumar329176c2010-09-28 19:59:25 +05301266 if (!v9fs_proto_dotu(v9ses))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001267 return -EBADF;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001268
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001269 st = p9_client_stat(fid);
1270 if (IS_ERR(st))
1271 return PTR_ERR(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001272
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001273 if (!(st->mode & P9_DMSYMLINK)) {
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001274 retval = -EINVAL;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001275 goto done;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001276 }
1277
1278 /* copy extension buffer into buffer */
Jim Meyeringba413ab2012-08-21 09:20:49 +02001279 retval = min(strlen(st->extension)+1, (size_t)buflen);
1280 memcpy(buffer, st->extension, retval);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001281
Jim Meyeringba413ab2012-08-21 09:20:49 +02001282 p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n",
1283 dentry->d_name.name, st->extension, buflen, buffer);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001284
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001285done:
Latchesar Ionkov62b2be52010-08-24 18:13:59 +00001286 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001287 kfree(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001288 return retval;
1289}
1290
1291/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001292 * v9fs_vfs_follow_link - follow a symlink path
1293 * @dentry: dentry for symlink
1294 * @nd: nameidata
1295 *
1296 */
1297
1298static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1299{
1300 int len = 0;
1301 char *link = __getname();
1302
Joe Perches5d385152011-11-28 10:40:46 -08001303 p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001304
1305 if (!link)
1306 link = ERR_PTR(-ENOMEM);
1307 else {
Latchesar Ionkov16cce6d2006-03-25 03:07:26 -08001308 len = v9fs_readlink(dentry, link, PATH_MAX);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001309
1310 if (len < 0) {
Davi Arnautce44eeb2005-11-07 00:59:36 -08001311 __putname(link);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001312 link = ERR_PTR(len);
1313 } else
Martin Stava2511cd02009-11-02 08:39:34 -06001314 link[min(len, PATH_MAX-1)] = 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001315 }
1316 nd_set_link(nd, link);
1317
1318 return NULL;
1319}
1320
1321/**
1322 * v9fs_vfs_put_link - release a symlink path
1323 * @dentry: dentry for symlink
1324 * @nd: nameidata
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001325 * @p: unused
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001326 *
1327 */
1328
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001329void
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001330v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001331{
1332 char *s = nd_get_link(nd);
1333
Joe Perches5d385152011-11-28 10:40:46 -08001334 p9_debug(P9_DEBUG_VFS, " %s %s\n",
1335 dentry->d_name.name, IS_ERR(s) ? "<error>" : s);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001336 if (!IS_ERR(s))
Davi Arnautce44eeb2005-11-07 00:59:36 -08001337 __putname(s);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001338}
1339
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001340/**
1341 * v9fs_vfs_mkspecial - create a special file
1342 * @dir: inode to create special file in
1343 * @dentry: dentry to create
1344 * @mode: mode to create special file
1345 * @extension: 9p2000.u format extension string representing special file
1346 *
1347 */
1348
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001349static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
Al Viroc2837de2011-07-24 18:59:07 -04001350 u32 perm, const char *extension)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001351{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001352 struct p9_fid *fid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301353 struct v9fs_session_info *v9ses;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001354
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001355 v9ses = v9fs_inode2v9ses(dir);
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001356 if (!v9fs_proto_dotu(v9ses)) {
Joe Perches5d385152011-11-28 10:40:46 -08001357 p9_debug(P9_DEBUG_ERROR, "not extended\n");
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001358 return -EPERM;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001359 }
1360
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001361 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1362 P9_OREAD);
1363 if (IS_ERR(fid))
1364 return PTR_ERR(fid);
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001365
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301366 v9fs_invalidate_inode_attr(dir);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001367 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001368 return 0;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001369}
1370
1371/**
1372 * v9fs_vfs_symlink - helper function to create symlinks
1373 * @dir: directory inode containing symlink
1374 * @dentry: dentry for symlink
1375 * @symname: symlink data
1376 *
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001377 * See Also: 9P2000.u RFC for more information
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001378 *
1379 */
1380
1381static int
1382v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1383{
Joe Perches5d385152011-11-28 10:40:46 -08001384 p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
1385 dir->i_ino, dentry->d_name.name, symname);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001386
Al Viroc2837de2011-07-24 18:59:07 -04001387 return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001388}
1389
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001390/**
1391 * v9fs_vfs_link - create a hardlink
1392 * @old_dentry: dentry for file to link to
1393 * @dir: inode destination for new link
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001394 * @dentry: dentry for link
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001395 *
1396 */
1397
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001398static int
1399v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1400 struct dentry *dentry)
1401{
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001402 int retval;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001403 char *name;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301404 struct p9_fid *oldfid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001405
Joe Perches5d385152011-11-28 10:40:46 -08001406 p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
1407 dir->i_ino, dentry->d_name.name, old_dentry->d_name.name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001408
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001409 oldfid = v9fs_fid_clone(old_dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001410 if (IS_ERR(oldfid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001411 return PTR_ERR(oldfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001412
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001413 name = __getname();
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001414 if (unlikely(!name)) {
1415 retval = -ENOMEM;
1416 goto clunk_fid;
1417 }
Florin Malita0710d362006-06-25 05:48:31 -07001418
Latchesar Ionkov16cce6d2006-03-25 03:07:26 -08001419 sprintf(name, "%d\n", oldfid->fid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001420 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001421 __putname(name);
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +05301422 if (!retval) {
1423 v9fs_refresh_inode(oldfid, old_dentry->d_inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301424 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +05301425 }
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001426clunk_fid:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001427 p9_client_clunk(oldfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001428 return retval;
1429}
1430
1431/**
1432 * v9fs_vfs_mknod - create a special file
1433 * @dir: inode destination for new link
1434 * @dentry: dentry for file
1435 * @mode: mode for creation
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001436 * @rdev: device associated with special file
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001437 *
1438 */
1439
1440static int
Al Viro1a67aaf2011-07-26 01:52:52 -04001441v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001442{
Al Viroc2837de2011-07-24 18:59:07 -04001443 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001444 int retval;
1445 char *name;
Al Viroc2837de2011-07-24 18:59:07 -04001446 u32 perm;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001447
Linus Torvalds609eac12012-01-10 15:09:01 -08001448 p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
Joe Perches5d385152011-11-28 10:40:46 -08001449 dir->i_ino, dentry->d_name.name, mode,
1450 MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001451
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001452 if (!new_valid_dev(rdev))
1453 return -EINVAL;
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001454
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001455 name = __getname();
Eugene Teoc0291a02006-03-25 03:07:27 -08001456 if (!name)
1457 return -ENOMEM;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001458 /* build extension */
1459 if (S_ISBLK(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001460 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001461 else if (S_ISCHR(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001462 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001463 else if (S_ISFIFO(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001464 *name = 0;
Venkateswararao Jujjuri75cc5c92010-05-22 12:20:30 -05001465 else if (S_ISSOCK(mode))
1466 *name = 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001467 else {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001468 __putname(name);
1469 return -EINVAL;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001470 }
1471
Al Viroc2837de2011-07-24 18:59:07 -04001472 perm = unixmode2p9mode(v9ses, mode);
1473 retval = v9fs_vfs_mkspecial(dir, dentry, perm, name);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001474 __putname(name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001475
1476 return retval;
1477}
1478
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301479int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
1480{
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001481 int umode;
1482 dev_t rdev;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301483 loff_t i_size;
1484 struct p9_wstat *st;
1485 struct v9fs_session_info *v9ses;
1486
1487 v9ses = v9fs_inode2v9ses(inode);
1488 st = p9_client_stat(fid);
1489 if (IS_ERR(st))
1490 return PTR_ERR(st);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001491 /*
1492 * Don't update inode if the file type is different
1493 */
1494 umode = p9mode2unixmode(v9ses, st, &rdev);
1495 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
1496 goto out;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301497
1498 spin_lock(&inode->i_lock);
1499 /*
1500 * We don't want to refresh inode->i_size,
1501 * because we may have cached data
1502 */
1503 i_size = inode->i_size;
1504 v9fs_stat2inode(st, inode, inode->i_sb);
1505 if (v9ses->cache)
1506 inode->i_size = i_size;
1507 spin_unlock(&inode->i_lock);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001508out:
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301509 p9stat_free(st);
1510 kfree(st);
1511 return 0;
1512}
1513
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001514static const struct inode_operations v9fs_dir_inode_operations_dotu = {
1515 .create = v9fs_vfs_create,
1516 .lookup = v9fs_vfs_lookup,
Miklos Szeredie43ae792012-06-05 15:10:26 +02001517 .atomic_open = v9fs_vfs_atomic_open,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001518 .symlink = v9fs_vfs_symlink,
Venkateswararao Jujjuri (JV)50cc42f2010-06-09 15:59:31 -07001519 .link = v9fs_vfs_link,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001520 .unlink = v9fs_vfs_unlink,
1521 .mkdir = v9fs_vfs_mkdir,
1522 .rmdir = v9fs_vfs_rmdir,
Aneesh Kumar K.V1d76e312010-08-30 17:43:07 +00001523 .mknod = v9fs_vfs_mknod,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001524 .rename = v9fs_vfs_rename,
1525 .getattr = v9fs_vfs_getattr,
1526 .setattr = v9fs_vfs_setattr,
1527};
1528
Arjan van de Ven754661f2007-02-12 00:55:38 -08001529static const struct inode_operations v9fs_dir_inode_operations = {
Eric Van Hensbergenb5016112005-09-09 13:04:27 -07001530 .create = v9fs_vfs_create,
1531 .lookup = v9fs_vfs_lookup,
Miklos Szeredie43ae792012-06-05 15:10:26 +02001532 .atomic_open = v9fs_vfs_atomic_open,
Eric Van Hensbergenb5016112005-09-09 13:04:27 -07001533 .unlink = v9fs_vfs_unlink,
1534 .mkdir = v9fs_vfs_mkdir,
1535 .rmdir = v9fs_vfs_rmdir,
1536 .mknod = v9fs_vfs_mknod,
1537 .rename = v9fs_vfs_rename,
1538 .getattr = v9fs_vfs_getattr,
1539 .setattr = v9fs_vfs_setattr,
1540};
1541
Arjan van de Ven754661f2007-02-12 00:55:38 -08001542static const struct inode_operations v9fs_file_inode_operations = {
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001543 .getattr = v9fs_vfs_getattr,
1544 .setattr = v9fs_vfs_setattr,
1545};
1546
Arjan van de Ven754661f2007-02-12 00:55:38 -08001547static const struct inode_operations v9fs_symlink_inode_operations = {
Al Viro204f2f02009-12-23 00:35:54 -05001548 .readlink = generic_readlink,
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001549 .follow_link = v9fs_vfs_follow_link,
1550 .put_link = v9fs_vfs_put_link,
1551 .getattr = v9fs_vfs_getattr,
1552 .setattr = v9fs_vfs_setattr,
1553};
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001554