blob: d86edc8d3fd05a0176e73136eedb50641eb091b0 [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
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -0500195 if (extended) {
196 if (uflags & O_EXCL)
197 ret |= P9_OEXCL;
198
199 if (uflags & O_APPEND)
200 ret |= P9_OAPPEND;
201 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800202
203 return ret;
204}
205
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700206/**
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800207 * v9fs_blank_wstat - helper function to setup a 9P stat structure
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800208 * @wstat: structure to initialize
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700209 *
210 */
211
M. Mohan Kumar7a4439c2010-02-08 15:36:48 -0600212void
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500213v9fs_blank_wstat(struct p9_wstat *wstat)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700214{
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800215 wstat->type = ~0;
216 wstat->dev = ~0;
217 wstat->qid.type = ~0;
218 wstat->qid.version = ~0;
219 *((long long *)&wstat->qid.path) = ~0;
220 wstat->mode = ~0;
221 wstat->atime = ~0;
222 wstat->mtime = ~0;
223 wstat->length = ~0;
224 wstat->name = NULL;
225 wstat->uid = NULL;
226 wstat->gid = NULL;
227 wstat->muid = NULL;
Eric W. Biederman447c5092013-01-29 16:18:50 -0800228 wstat->n_uid = INVALID_UID;
229 wstat->n_gid = INVALID_GID;
230 wstat->n_muid = INVALID_UID;
Latchesar Ionkov531b1092006-01-08 01:05:00 -0800231 wstat->extension = NULL;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700232}
233
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500234/**
235 * v9fs_alloc_inode - helper function to allocate an inode
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500236 *
237 */
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500238struct inode *v9fs_alloc_inode(struct super_block *sb)
239{
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530240 struct v9fs_inode *v9inode;
241 v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
242 GFP_KERNEL);
243 if (!v9inode)
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500244 return NULL;
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530245#ifdef CONFIG_9P_FSCACHE
246 v9inode->fscache = NULL;
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530247 spin_lock_init(&v9inode->fscache_lock);
248#endif
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530249 v9inode->writeback_fid = NULL;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +0530250 v9inode->cache_validity = 0;
Aneesh Kumar K.V5a7e0a82011-03-08 16:39:46 +0530251 mutex_init(&v9inode->v_mutex);
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530252 return &v9inode->vfs_inode;
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500253}
254
255/**
256 * v9fs_destroy_inode - destroy an inode
257 *
258 */
259
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100260static void v9fs_i_callback(struct rcu_head *head)
261{
262 struct inode *inode = container_of(head, struct inode, i_rcu);
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530263 kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100264}
265
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500266void v9fs_destroy_inode(struct inode *inode)
267{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100268 call_rcu(&inode->i_rcu, v9fs_i_callback);
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500269}
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500270
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530271int v9fs_init_inode(struct v9fs_session_info *v9ses,
Al Viro3eda0de2011-07-26 02:53:22 -0400272 struct inode *inode, umode_t mode, dev_t rdev)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700273{
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530274 int err = 0;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600275
Dmitry Monakhov217f2062010-03-04 17:30:57 +0300276 inode_init_owner(inode, NULL, mode);
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600277 inode->i_blocks = 0;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000278 inode->i_rdev = rdev;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600279 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
280 inode->i_mapping->a_ops = &v9fs_addr_operations;
281
282 switch (mode & S_IFMT) {
283 case S_IFIFO:
284 case S_IFBLK:
285 case S_IFCHR:
286 case S_IFSOCK:
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530287 if (v9fs_proto_dotl(v9ses)) {
288 inode->i_op = &v9fs_file_inode_operations_dotl;
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530289 } else if (v9fs_proto_dotu(v9ses)) {
290 inode->i_op = &v9fs_file_inode_operations;
M. Mohan Kumar4b435162010-06-16 14:27:01 +0530291 } else {
Joe Perches5d385152011-11-28 10:40:46 -0800292 p9_debug(P9_DEBUG_ERROR,
293 "special files without extended mode\n");
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600294 err = -EINVAL;
295 goto error;
296 }
297 init_special_inode(inode, inode->i_mode, inode->i_rdev);
298 break;
299 case S_IFREG:
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000300 if (v9fs_proto_dotl(v9ses)) {
301 inode->i_op = &v9fs_file_inode_operations_dotl;
Aneesh Kumar K.V29236f42011-02-28 17:03:54 +0530302 if (v9ses->cache)
303 inode->i_fop =
304 &v9fs_cached_file_operations_dotl;
305 else
306 inode->i_fop = &v9fs_file_operations_dotl;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000307 } else {
308 inode->i_op = &v9fs_file_inode_operations;
Aneesh Kumar K.V29236f42011-02-28 17:03:54 +0530309 if (v9ses->cache)
310 inode->i_fop = &v9fs_cached_file_operations;
311 else
312 inode->i_fop = &v9fs_file_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000313 }
314
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600315 break;
316 case S_IFLNK:
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000317 if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
Joe Perches5d385152011-11-28 10:40:46 -0800318 p9_debug(P9_DEBUG_ERROR,
319 "extended modes used with legacy protocol\n");
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600320 err = -EINVAL;
321 goto error;
322 }
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000323
324 if (v9fs_proto_dotl(v9ses))
325 inode->i_op = &v9fs_symlink_inode_operations_dotl;
326 else
327 inode->i_op = &v9fs_symlink_inode_operations;
328
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600329 break;
330 case S_IFDIR:
331 inc_nlink(inode);
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000332 if (v9fs_proto_dotl(v9ses))
333 inode->i_op = &v9fs_dir_inode_operations_dotl;
334 else if (v9fs_proto_dotu(v9ses))
335 inode->i_op = &v9fs_dir_inode_operations_dotu;
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600336 else
337 inode->i_op = &v9fs_dir_inode_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +0000338
339 if (v9fs_proto_dotl(v9ses))
340 inode->i_fop = &v9fs_dir_operations_dotl;
341 else
342 inode->i_fop = &v9fs_dir_operations;
343
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600344 break;
345 default:
Linus Torvalds609eac12012-01-10 15:09:01 -0800346 p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n",
Joe Perches5d385152011-11-28 10:40:46 -0800347 mode, mode & S_IFMT);
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600348 err = -EINVAL;
349 goto error;
350 }
Abhishek Kulkarni2bb54112009-07-19 13:41:56 -0600351error:
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530352 return err;
353
354}
355
356/**
357 * v9fs_get_inode - helper function to setup an inode
358 * @sb: superblock
359 * @mode: mode to setup inode with
360 *
361 */
362
Al Viro3eda0de2011-07-26 02:53:22 -0400363struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530364{
365 int err;
366 struct inode *inode;
367 struct v9fs_session_info *v9ses = sb->s_fs_info;
368
Linus Torvalds609eac12012-01-10 15:09:01 -0800369 p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530370
371 inode = new_inode(sb);
372 if (!inode) {
Joe Perches5d385152011-11-28 10:40:46 -0800373 pr_warn("%s (%d): Problem allocating inode\n",
374 __func__, task_pid_nr(current));
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530375 return ERR_PTR(-ENOMEM);
376 }
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000377 err = v9fs_init_inode(v9ses, inode, mode, rdev);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530378 if (err) {
379 iput(inode);
380 return ERR_PTR(err);
381 }
382 return inode;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700383}
384
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500385/*
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800386static struct v9fs_fid*
387v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
388{
389 int err;
Mika Kukkonen736c4b852006-12-06 20:36:29 -0800390 int nfid;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800391 struct v9fs_fid *ret;
392 struct v9fs_fcall *fcall;
393
394 nfid = v9fs_get_idpool(&v9ses->fidpool);
395 if (nfid < 0) {
396 eprintk(KERN_WARNING, "no free fids available\n");
Latchesar Ionkov731805b2006-03-07 21:55:42 -0800397 return ERR_PTR(-ENOSPC);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800398 }
399
400 err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
401 &fcall);
402
403 if (err < 0) {
Latchesar Ionkov41e5a6a2006-05-15 09:44:21 -0700404 if (fcall && fcall->id == RWALK)
405 goto clunk_fid;
406
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800407 PRINT_FCALL_ERROR("walk error", fcall);
408 v9fs_put_idpool(nfid, &v9ses->fidpool);
409 goto error;
410 }
411
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700412 kfree(fcall);
Latchesar Ionkov3cf64292006-01-08 01:04:58 -0800413 fcall = NULL;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800414 ret = v9fs_fid_create(v9ses, nfid);
415 if (!ret) {
416 err = -ENOMEM;
417 goto clunk_fid;
418 }
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700419
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800420 err = v9fs_fid_insert(ret, dentry);
421 if (err < 0) {
422 v9fs_fid_destroy(ret);
423 goto clunk_fid;
Latchesar Ionkov0b8dd172005-09-27 21:45:24 -0700424 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800425
426 return ret;
427
428clunk_fid:
429 v9fs_t_clunk(v9ses, nfid);
430
431error:
432 kfree(fcall);
433 return ERR_PTR(err);
434}
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500435*/
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800436
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500437
438/**
439 * v9fs_clear_inode - release an inode
440 * @inode: inode to release
441 *
442 */
Al Virob57922d2010-06-07 14:34:48 -0400443void v9fs_evict_inode(struct inode *inode)
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500444{
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530445 struct v9fs_inode *v9inode = V9FS_I(inode);
446
Al Virob57922d2010-06-07 14:34:48 -0400447 truncate_inode_pages(inode->i_mapping, 0);
Jan Karadbd57682012-05-03 14:48:02 +0200448 clear_inode(inode);
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500449 filemap_fdatawrite(inode->i_mapping);
450
451#ifdef CONFIG_9P_FSCACHE
452 v9fs_cache_inode_put_cookie(inode);
453#endif
Aneesh Kumar K.V6b39f6d2011-02-28 17:04:03 +0530454 /* clunk the fid stashed in writeback_fid */
455 if (v9inode->writeback_fid) {
456 p9_client_clunk(v9inode->writeback_fid);
457 v9inode->writeback_fid = NULL;
Aneesh Kumar K.V3cf387d2011-02-28 17:03:57 +0530458 }
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -0500459}
460
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000461static int v9fs_test_inode(struct inode *inode, void *data)
462{
463 int umode;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000464 dev_t rdev;
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000465 struct v9fs_inode *v9inode = V9FS_I(inode);
466 struct p9_wstat *st = (struct p9_wstat *)data;
467 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
468
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000469 umode = p9mode2unixmode(v9ses, st, &rdev);
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000470 /* don't match inode of different type */
471 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
472 return 0;
473
474 /* compare qid details */
475 if (memcmp(&v9inode->qid.version,
476 &st->qid.version, sizeof(v9inode->qid.version)))
477 return 0;
478
479 if (v9inode->qid.type != st->qid.type)
480 return 0;
481 return 1;
482}
483
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530484static int v9fs_test_new_inode(struct inode *inode, void *data)
485{
486 return 0;
487}
488
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000489static int v9fs_set_inode(struct inode *inode, void *data)
490{
491 struct v9fs_inode *v9inode = V9FS_I(inode);
492 struct p9_wstat *st = (struct p9_wstat *)data;
493
494 memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
495 return 0;
496}
497
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530498static struct inode *v9fs_qid_iget(struct super_block *sb,
499 struct p9_qid *qid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530500 struct p9_wstat *st,
501 int new)
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530502{
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000503 dev_t rdev;
Al Viro3eda0de2011-07-26 02:53:22 -0400504 int retval;
505 umode_t umode;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530506 unsigned long i_ino;
507 struct inode *inode;
508 struct v9fs_session_info *v9ses = sb->s_fs_info;
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530509 int (*test)(struct inode *, void *);
510
511 if (new)
512 test = v9fs_test_new_inode;
513 else
514 test = v9fs_test_inode;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530515
516 i_ino = v9fs_qid2ino(qid);
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530517 inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530518 if (!inode)
519 return ERR_PTR(-ENOMEM);
520 if (!(inode->i_state & I_NEW))
521 return inode;
522 /*
523 * initialize the inode with the stat info
524 * FIXME!! we may need support for stale inodes
525 * later.
526 */
Aneesh Kumar K.Vfd2421f2011-07-11 16:40:59 +0000527 inode->i_ino = i_ino;
Aneesh Kumar K.V45089142011-07-25 18:06:33 +0000528 umode = p9mode2unixmode(v9ses, st, &rdev);
529 retval = v9fs_init_inode(v9ses, inode, umode, rdev);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530530 if (retval)
531 goto error;
532
533 v9fs_stat2inode(st, inode, sb);
534#ifdef CONFIG_9P_FSCACHE
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530535 v9fs_cache_inode_get_cookie(inode);
536#endif
537 unlock_new_inode(inode);
538 return inode;
539error:
540 unlock_new_inode(inode);
541 iput(inode);
542 return ERR_PTR(retval);
543
544}
545
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600546struct inode *
Aneesh Kumar K.Va78ce052011-02-28 17:04:02 +0530547v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530548 struct super_block *sb, int new)
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800549{
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500550 struct p9_wstat *st;
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530551 struct inode *inode = NULL;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800552
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500553 st = p9_client_stat(fid);
Abhishek Kulkarni02bc3562009-07-19 13:41:54 -0600554 if (IS_ERR(st))
555 return ERR_CAST(st);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800556
Aneesh Kumar K.Ved80fcf2011-07-06 16:32:31 +0530557 inode = v9fs_qid_iget(sb, &st->qid, st, new);
Abhishek Kulkarni02bc3562009-07-19 13:41:54 -0600558 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500559 kfree(st);
Aneesh Kumar K.V5ffc0cb2011-02-28 17:04:01 +0530560 return inode;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700561}
562
563/**
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530564 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
565 * plan 9 AT flag.
566 * @flags: flags to convert
567 */
568static int v9fs_at_to_dotl_flags(int flags)
569{
570 int rflags = 0;
571 if (flags & AT_REMOVEDIR)
572 rflags |= P9_DOTL_AT_REMOVEDIR;
573 return rflags;
574}
575
576/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700577 * v9fs_remove - helper function to remove files and directories
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700578 * @dir: directory inode that is being deleted
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530579 * @dentry: dentry that is being deleted
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700580 * @rmdir: removing a directory
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700581 *
582 */
583
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530584static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700585{
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530586 struct inode *inode;
587 int retval = -EOPNOTSUPP;
588 struct p9_fid *v9fid, *dfid;
589 struct v9fs_session_info *v9ses;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700590
Joe Perches5d385152011-11-28 10:40:46 -0800591 p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
592 dir, dentry, flags);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700593
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530594 v9ses = v9fs_inode2v9ses(dir);
595 inode = dentry->d_inode;
596 dfid = v9fs_fid_lookup(dentry->d_parent);
597 if (IS_ERR(dfid)) {
598 retval = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800599 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530600 return retval;
601 }
602 if (v9fs_proto_dotl(v9ses))
Aneesh Kumar K.Vf88657c2011-08-03 19:55:32 +0530603 retval = p9_client_unlinkat(dfid, dentry->d_name.name,
604 v9fs_at_to_dotl_flags(flags));
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530605 if (retval == -EOPNOTSUPP) {
606 /* Try the one based on path */
607 v9fid = v9fs_fid_clone(dentry);
608 if (IS_ERR(v9fid))
609 return PTR_ERR(v9fid);
610 retval = p9_client_remove(v9fid);
611 }
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530612 if (!retval) {
613 /*
614 * directories on unlink should have zero
615 * link count
616 */
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530617 if (flags & AT_REMOVEDIR) {
618 clear_nlink(inode);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530619 drop_nlink(dir);
620 } else
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530621 drop_nlink(inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530622
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530623 v9fs_invalidate_inode_attr(inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530624 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530625 }
Aneesh Kumar K.Vd994f402010-03-29 18:14:50 -0500626 return retval;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700627}
628
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500629/**
630 * v9fs_create - Create a file
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600631 * @v9ses: session information
632 * @dir: directory that dentry is being created in
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500633 * @dentry: dentry that is being created
Abhishek Kulkarni0e155972009-07-19 13:41:55 -0600634 * @extension: 9p2000.u extension string to support devices, etc.
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500635 * @perm: create permissions
636 * @mode: open mode
637 *
638 */
639static struct p9_fid *
640v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
641 struct dentry *dentry, char *extension, u32 perm, u8 mode)
642{
643 int err;
644 char *name;
645 struct p9_fid *dfid, *ofid, *fid;
646 struct inode *inode;
647
Joe Perches5d385152011-11-28 10:40:46 -0800648 p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500649
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500650 err = 0;
651 ofid = NULL;
652 fid = NULL;
653 name = (char *) dentry->d_name.name;
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000654 dfid = v9fs_fid_lookup(dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500655 if (IS_ERR(dfid)) {
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500656 err = PTR_ERR(dfid);
Joe Perches5d385152011-11-28 10:40:46 -0800657 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000658 return ERR_PTR(err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500659 }
660
661 /* clone a fid to use for creation */
662 ofid = p9_client_walk(dfid, 0, NULL, 1);
663 if (IS_ERR(ofid)) {
664 err = PTR_ERR(ofid);
Joe Perches5d385152011-11-28 10:40:46 -0800665 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000666 return ERR_PTR(err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500667 }
668
669 err = p9_client_fcreate(ofid, name, perm, mode, extension);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500670 if (err < 0) {
Joe Perches5d385152011-11-28 10:40:46 -0800671 p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500672 goto error;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -0500673 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500674
Aneesh Kumar K.Vb6054792012-01-05 10:42:17 -0600675 if (!(perm & P9_DMLINK)) {
676 /* now walk from the parent so we can get unopened fid */
677 fid = p9_client_walk(dfid, 1, &name, 1);
678 if (IS_ERR(fid)) {
679 err = PTR_ERR(fid);
680 p9_debug(P9_DEBUG_VFS,
681 "p9_client_walk failed %d\n", err);
682 fid = NULL;
683 goto error;
684 }
685 /*
686 * instantiate inode and assign the unopened fid to the dentry
687 */
688 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
689 if (IS_ERR(inode)) {
690 err = PTR_ERR(inode);
691 p9_debug(P9_DEBUG_VFS,
692 "inode creation failed %d\n", err);
693 goto error;
694 }
Al Viro2ea03e1d2013-02-28 01:18:14 -0500695 v9fs_fid_add(dentry, fid);
Aneesh Kumar K.Vb6054792012-01-05 10:42:17 -0600696 d_instantiate(dentry, inode);
Venkateswararao Jujjuri6d27e642010-05-10 18:08:28 +0000697 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500698 return ofid;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500699error:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500700 if (ofid)
701 p9_client_clunk(ofid);
702
703 if (fid)
704 p9_client_clunk(fid);
705
706 return ERR_PTR(err);
707}
708
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700709/**
Miklos Szeredie43ae792012-06-05 15:10:26 +0200710 * v9fs_vfs_create - VFS hook to create a regular file
711 *
712 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called
713 * for mknod(2).
714 *
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600715 * @dir: directory inode that is being created
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700716 * @dentry: dentry that is being deleted
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800717 * @mode: create permissions
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700718 *
719 */
720
721static int
Al Viro4acdaf22011-07-26 01:42:34 -0400722v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400723 bool excl)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700724{
Miklos Szeredie43ae792012-06-05 15:10:26 +0200725 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
726 u32 perm = unixmode2p9mode(v9ses, mode);
727 struct p9_fid *fid;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800728
Miklos Szeredie43ae792012-06-05 15:10:26 +0200729 /* P9_OEXCL? */
730 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
731 if (IS_ERR(fid))
732 return PTR_ERR(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800733
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530734 v9fs_invalidate_inode_attr(dir);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200735 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800736
737 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700738}
739
740/**
741 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
Eric Van Hensbergenee443992008-03-05 07:08:09 -0600742 * @dir: inode that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700743 * @dentry: dentry that is being unlinked
744 * @mode: mode for new directory
745 *
746 */
747
Al Viro18bb1db2011-07-26 01:41:39 -0400748static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700749{
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800750 int err;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500751 u32 perm;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500752 struct p9_fid *fid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530753 struct v9fs_session_info *v9ses;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800754
Joe Perches5d385152011-11-28 10:40:46 -0800755 p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500756 err = 0;
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800757 v9ses = v9fs_inode2v9ses(dir);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800758 perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500759 fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
760 if (IS_ERR(fid)) {
761 err = PTR_ERR(fid);
762 fid = NULL;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530763 } else {
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530764 inc_nlink(dir);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530765 v9fs_invalidate_inode_attr(dir);
766 }
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800767
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500768 if (fid)
769 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800770
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -0800771 return err;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700772}
773
774/**
775 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
776 * @dir: inode that is being walked from
777 * @dentry: dentry that is being walked to?
778 * @nameidata: path data
779 *
780 */
781
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600782struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400783 unsigned int flags)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700784{
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530785 struct dentry *res;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700786 struct super_block *sb;
787 struct v9fs_session_info *v9ses;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500788 struct p9_fid *dfid, *fid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700789 struct inode *inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500790 char *name;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700791
Al Viro00cd8dd2012-06-10 17:13:09 -0400792 p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
793 dir, dentry->d_name.name, dentry, flags);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700794
Sripathi Kodi11e9b492010-03-29 18:13:59 -0500795 if (dentry->d_name.len > NAME_MAX)
796 return ERR_PTR(-ENAMETOOLONG);
797
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700798 sb = dir->i_sb;
799 v9ses = v9fs_inode2v9ses(dir);
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +0530800 /* We can walk d_parent because we hold the dir->i_mutex */
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500801 dfid = v9fs_fid_lookup(dentry->d_parent);
802 if (IS_ERR(dfid))
David Howellse231c2e2008-02-07 00:15:26 -0800803 return ERR_CAST(dfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700804
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500805 name = (char *) dentry->d_name.name;
806 fid = p9_client_walk(dfid, 1, &name, 1);
807 if (IS_ERR(fid)) {
Al Viro7b5be622013-02-28 01:28:21 -0500808 if (fid == ERR_PTR(-ENOENT)) {
809 d_add(dentry, NULL);
810 return NULL;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700811 }
Al Viro7b5be622013-02-28 01:28:21 -0500812 return ERR_CAST(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700813 }
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530814 /*
815 * Make sure we don't use a wrong inode due to parallel
816 * unlink. For cached mode create calls request for new
817 * inode. But with cache disabled, lookup should do this.
818 */
819 if (v9ses->cache)
820 inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
821 else
822 inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500823 if (IS_ERR(inode)) {
Al Viro7b5be622013-02-28 01:28:21 -0500824 p9_client_clunk(fid);
825 return ERR_CAST(inode);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700826 }
Aneesh Kumar K.V73f50712011-08-16 22:19:28 +0530827 /*
828 * If we had a rename on the server and a parallel lookup
829 * for the new name, then make sure we instantiate with
830 * the new name. ie look up for a/b, while on server somebody
831 * moved b under k and client parallely did a lookup for
832 * k/b.
833 */
834 res = d_materialise_unique(dentry, inode);
Al Viroa3b21572013-02-28 01:29:48 -0500835 if (!res)
836 v9fs_fid_add(dentry, fid);
837 else if (!IS_ERR(res))
838 v9fs_fid_add(res, fid);
839 else
Al Viro7b5be622013-02-28 01:28:21 -0500840 p9_client_clunk(fid);
841 return res;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700842}
843
Al Virod9585272012-06-22 12:39:14 +0400844static int
Miklos Szeredie43ae792012-06-05 15:10:26 +0200845v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
Al Viro30d90492012-06-22 12:40:19 +0400846 struct file *file, unsigned flags, umode_t mode,
Al Viro47237682012-06-10 05:01:45 -0400847 int *opened)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200848{
849 int err;
850 u32 perm;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200851 struct v9fs_inode *v9inode;
852 struct v9fs_session_info *v9ses;
853 struct p9_fid *fid, *inode_fid;
854 struct dentry *res = NULL;
855
856 if (d_unhashed(dentry)) {
Al Viro00cd8dd2012-06-10 17:13:09 -0400857 res = v9fs_vfs_lookup(dir, dentry, 0);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200858 if (IS_ERR(res))
Al Virod9585272012-06-22 12:39:14 +0400859 return PTR_ERR(res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200860
861 if (res)
862 dentry = res;
863 }
864
865 /* Only creates */
Al Viroe45198a2012-06-10 06:48:09 -0400866 if (!(flags & O_CREAT) || dentry->d_inode)
867 return finish_no_open(file, res);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200868
869 err = 0;
870 fid = NULL;
871 v9ses = v9fs_inode2v9ses(dir);
872 perm = unixmode2p9mode(v9ses, mode);
873 fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
874 v9fs_uflags2omode(flags,
875 v9fs_proto_dotu(v9ses)));
876 if (IS_ERR(fid)) {
877 err = PTR_ERR(fid);
878 fid = NULL;
879 goto error;
880 }
881
882 v9fs_invalidate_inode_attr(dir);
883 v9inode = V9FS_I(dentry->d_inode);
884 mutex_lock(&v9inode->v_mutex);
885 if (v9ses->cache && !v9inode->writeback_fid &&
886 ((flags & O_ACCMODE) != O_RDONLY)) {
887 /*
888 * clone a fid and add it to writeback_fid
889 * we do it during open time instead of
890 * page dirty time via write_begin/page_mkwrite
891 * because we want write after unlink usecase
892 * to work.
893 */
894 inode_fid = v9fs_writeback_fid(dentry);
895 if (IS_ERR(inode_fid)) {
896 err = PTR_ERR(inode_fid);
897 mutex_unlock(&v9inode->v_mutex);
898 goto error;
899 }
900 v9inode->writeback_fid = (void *) inode_fid;
901 }
902 mutex_unlock(&v9inode->v_mutex);
Al Viro30d90492012-06-22 12:40:19 +0400903 err = finish_open(file, dentry, generic_file_open, opened);
904 if (err)
Miklos Szeredie43ae792012-06-05 15:10:26 +0200905 goto error;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200906
Al Viro30d90492012-06-22 12:40:19 +0400907 file->private_data = fid;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200908#ifdef CONFIG_9P_FSCACHE
909 if (v9ses->cache)
Al Viro30d90492012-06-22 12:40:19 +0400910 v9fs_cache_inode_set_cookie(dentry->d_inode, file);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200911#endif
912
Al Viro47237682012-06-10 05:01:45 -0400913 *opened |= FILE_CREATED;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200914out:
915 dput(res);
Al Virod9585272012-06-22 12:39:14 +0400916 return err;
Miklos Szeredie43ae792012-06-05 15:10:26 +0200917
918error:
919 if (fid)
920 p9_client_clunk(fid);
Miklos Szeredie43ae792012-06-05 15:10:26 +0200921 goto out;
922}
923
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700924/**
925 * v9fs_vfs_unlink - VFS unlink hook to delete an inode
926 * @i: inode that is being unlinked
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700927 * @d: dentry that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700928 *
929 */
930
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600931int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700932{
933 return v9fs_remove(i, d, 0);
934}
935
936/**
937 * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
938 * @i: inode that is being unlinked
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -0700939 * @d: dentry that is being unlinked
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700940 *
941 */
942
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600943int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700944{
Aneesh Kumar K.V48e370f2011-06-28 15:41:18 +0530945 return v9fs_remove(i, d, AT_REMOVEDIR);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700946}
947
948/**
949 * v9fs_vfs_rename - VFS hook to rename an inode
950 * @old_dir: old dir inode
951 * @old_dentry: old dentry
952 * @new_dir: new dir inode
953 * @new_dentry: new dentry
954 *
955 */
956
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -0600957int
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700958v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
959 struct inode *new_dir, struct dentry *new_dentry)
960{
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +0530961 int retval;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500962 struct inode *old_inode;
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530963 struct inode *new_inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500964 struct v9fs_session_info *v9ses;
965 struct p9_fid *oldfid;
966 struct p9_fid *olddirfid;
967 struct p9_fid *newdirfid;
968 struct p9_wstat wstat;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700969
Joe Perches5d385152011-11-28 10:40:46 -0800970 p9_debug(P9_DEBUG_VFS, "\n");
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500971 retval = 0;
972 old_inode = old_dentry->d_inode;
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +0530973 new_inode = new_dentry->d_inode;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500974 v9ses = v9fs_inode2v9ses(old_inode);
975 oldfid = v9fs_fid_lookup(old_dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500976 if (IS_ERR(oldfid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800977 return PTR_ERR(oldfid);
978
979 olddirfid = v9fs_fid_clone(old_dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500980 if (IS_ERR(olddirfid)) {
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800981 retval = PTR_ERR(olddirfid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500982 goto done;
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800983 }
984
985 newdirfid = v9fs_fid_clone(new_dentry->d_parent);
Latchesar Ionkovba176742007-10-17 14:31:07 -0500986 if (IS_ERR(newdirfid)) {
Eric Van Hensbergenda977b22007-01-26 00:57:06 -0800987 retval = PTR_ERR(newdirfid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500988 goto clunk_olddir;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -0700989 }
990
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +0530991 down_write(&v9ses->rename_sem);
Sripathi Kodi4681dbd2010-03-25 12:47:26 +0000992 if (v9fs_proto_dotl(v9ses)) {
Aneesh Kumar K.V9e8fb382011-06-28 15:41:16 +0530993 retval = p9_client_renameat(olddirfid, old_dentry->d_name.name,
994 newdirfid, new_dentry->d_name.name);
995 if (retval == -EOPNOTSUPP)
996 retval = p9_client_rename(oldfid, newdirfid,
997 new_dentry->d_name.name);
998 if (retval != -EOPNOTSUPP)
Sripathi Kodi4681dbd2010-03-25 12:47:26 +0000999 goto clunk_newdir;
1000 }
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301001 if (old_dentry->d_parent != new_dentry->d_parent) {
1002 /*
1003 * 9P .u can only handle file rename in the same directory
1004 */
Sripathi Kodi4681dbd2010-03-25 12:47:26 +00001005
Joe Perches5d385152011-11-28 10:40:46 -08001006 p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n");
Eric Van Hensbergen621997c2007-01-26 00:57:04 -08001007 retval = -EXDEV;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001008 goto clunk_newdir;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001009 }
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001010 v9fs_blank_wstat(&wstat);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001011 wstat.muid = v9ses->uname;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001012 wstat.name = (char *) new_dentry->d_name.name;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001013 retval = p9_client_wstat(oldfid, &wstat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001014
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001015clunk_newdir:
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +05301016 if (!retval) {
1017 if (new_inode) {
1018 if (S_ISDIR(new_inode->i_mode))
1019 clear_nlink(new_inode);
1020 else
1021 drop_nlink(new_inode);
1022 }
1023 if (S_ISDIR(old_inode->i_mode)) {
1024 if (!new_inode)
1025 inc_nlink(new_dir);
1026 drop_nlink(old_dir);
1027 }
Aneesh Kumar K.V3bc86de2011-02-28 17:04:07 +05301028 v9fs_invalidate_inode_attr(old_inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301029 v9fs_invalidate_inode_attr(old_dir);
1030 v9fs_invalidate_inode_attr(new_dir);
Aneesh Kumar K.V3bc86de2011-02-28 17:04:07 +05301031
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301032 /* successful rename */
1033 d_move(old_dentry, new_dentry);
Aneesh Kumar K.Vb271ec42011-02-28 17:04:05 +05301034 }
Aneesh Kumar K.Va534c8d2010-06-30 19:18:50 +05301035 up_write(&v9ses->rename_sem);
Latchesar Ionkov22150c42007-10-23 13:48:33 -05001036 p9_client_clunk(newdirfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001037
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001038clunk_olddir:
Latchesar Ionkov22150c42007-10-23 13:48:33 -05001039 p9_client_clunk(olddirfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001040
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001041done:
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001042 return retval;
1043}
1044
1045/**
Adrian Bunk943ffb52006-01-10 00:10:13 +01001046 * v9fs_vfs_getattr - retrieve file metadata
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001047 * @mnt: mount information
1048 * @dentry: file to get attributes on
1049 * @stat: metadata structure to populate
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001050 *
1051 */
1052
1053static int
1054v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1055 struct kstat *stat)
1056{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001057 int err;
1058 struct v9fs_session_info *v9ses;
1059 struct p9_fid *fid;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001060 struct p9_wstat *st;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001061
Joe Perches5d385152011-11-28 10:40:46 -08001062 p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001063 err = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301064 v9ses = v9fs_dentry2v9ses(dentry);
Aneesh Kumar K.Va1211902011-02-28 17:04:01 +05301065 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
1066 generic_fillattr(dentry->d_inode, stat);
1067 return 0;
1068 }
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001069 fid = v9fs_fid_lookup(dentry);
1070 if (IS_ERR(fid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001071 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001072
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001073 st = p9_client_stat(fid);
1074 if (IS_ERR(st))
1075 return PTR_ERR(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001076
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001077 v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001078 generic_fillattr(dentry->d_inode, stat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001079
Latchesar Ionkov62b2be52010-08-24 18:13:59 +00001080 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001081 kfree(st);
1082 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001083}
1084
1085/**
1086 * v9fs_vfs_setattr - set file metadata
1087 * @dentry: file whose metadata to set
1088 * @iattr: metadata assignment structure
1089 *
1090 */
1091
1092static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
1093{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001094 int retval;
1095 struct v9fs_session_info *v9ses;
1096 struct p9_fid *fid;
1097 struct p9_wstat wstat;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001098
Joe Perches5d385152011-11-28 10:40:46 -08001099 p9_debug(P9_DEBUG_VFS, "\n");
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301100 retval = inode_change_ok(dentry->d_inode, iattr);
1101 if (retval)
1102 return retval;
1103
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001104 retval = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301105 v9ses = v9fs_dentry2v9ses(dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001106 fid = v9fs_fid_lookup(dentry);
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001107 if(IS_ERR(fid))
1108 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001109
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001110 v9fs_blank_wstat(&wstat);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001111 if (iattr->ia_valid & ATTR_MODE)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001112 wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001113
1114 if (iattr->ia_valid & ATTR_MTIME)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001115 wstat.mtime = iattr->ia_mtime.tv_sec;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001116
1117 if (iattr->ia_valid & ATTR_ATIME)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001118 wstat.atime = iattr->ia_atime.tv_sec;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001119
1120 if (iattr->ia_valid & ATTR_SIZE)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001121 wstat.length = iattr->ia_size;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001122
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001123 if (v9fs_proto_dotu(v9ses)) {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001124 if (iattr->ia_valid & ATTR_UID)
1125 wstat.n_uid = iattr->ia_uid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001126
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001127 if (iattr->ia_valid & ATTR_GID)
1128 wstat.n_gid = iattr->ia_gid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001129 }
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301130
Aneesh Kumar K.V3dc54362011-02-28 17:04:11 +05301131 /* Write all dirty data */
1132 if (S_ISREG(dentry->d_inode->i_mode))
1133 filemap_write_and_wait(dentry->d_inode->i_mapping);
1134
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +05301135 retval = p9_client_wstat(fid, &wstat);
1136 if (retval < 0)
1137 return retval;
Aneesh Kumar K.V059c1382011-03-08 16:39:48 +05301138
1139 if ((iattr->ia_valid & ATTR_SIZE) &&
1140 iattr->ia_size != i_size_read(dentry->d_inode))
1141 truncate_setsize(dentry->d_inode, iattr->ia_size);
1142
Aneesh Kumar K.Vf10fc502011-02-28 17:04:10 +05301143 v9fs_invalidate_inode_attr(dentry->d_inode);
Christoph Hellwig10257742010-06-04 11:30:02 +02001144
1145 setattr_copy(dentry->d_inode, iattr);
1146 mark_inode_dirty(dentry->d_inode);
1147 return 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001148}
1149
1150/**
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001151 * v9fs_stat2inode - populate an inode structure with mistat info
1152 * @stat: Plan 9 metadata (mistat) structure
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001153 * @inode: inode to populate
1154 * @sb: superblock of filesystem
1155 *
1156 */
1157
1158void
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001159v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001160 struct super_block *sb)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001161{
Al Viro3eda0de2011-07-26 02:53:22 -04001162 umode_t mode;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001163 char ext[32];
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001164 char tag_name[14];
1165 unsigned int i_nlink;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001166 struct v9fs_session_info *v9ses = sb->s_fs_info;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301167 struct v9fs_inode *v9inode = V9FS_I(inode);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001168
Miklos Szeredibfe86842011-10-28 14:13:29 +02001169 set_nlink(inode, 1);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001170
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001171 inode->i_atime.tv_sec = stat->atime;
1172 inode->i_mtime.tv_sec = stat->mtime;
1173 inode->i_ctime.tv_sec = stat->mtime;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001174
Latchesar Ionkovbd32b822007-10-17 14:31:07 -05001175 inode->i_uid = v9ses->dfltuid;
1176 inode->i_gid = v9ses->dfltgid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001177
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001178 if (v9fs_proto_dotu(v9ses)) {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001179 inode->i_uid = stat->n_uid;
1180 inode->i_gid = stat->n_gid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001181 }
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001182 if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
1183 if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
1184 /*
1185 * Hadlink support got added later to
1186 * to the .u extension. So there can be
1187 * server out there that doesn't support
1188 * this even with .u extension. So check
1189 * for non NULL stat->extension
1190 */
1191 strncpy(ext, stat->extension, sizeof(ext));
1192 /* HARDLINKCOUNT %u */
1193 sscanf(ext, "%13s %u", tag_name, &i_nlink);
1194 if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
Miklos Szeredibfe86842011-10-28 14:13:29 +02001195 set_nlink(inode, i_nlink);
Aneesh Kumar K.V57171442010-03-05 14:43:43 -06001196 }
1197 }
Aneesh Kumar K.Vdf345c62012-01-05 13:39:49 +05301198 mode = p9mode2perm(v9ses, stat);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001199 mode |= inode->i_mode & ~S_IALLUGO;
1200 inode->i_mode = mode;
Abhishek Kulkarni7549ae32009-09-22 11:34:05 -05001201 i_size_write(inode, stat->length);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001202
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001203 /* not real number of blocks, but 512 byte ones ... */
Abhishek Kulkarni7549ae32009-09-22 11:34:05 -05001204 inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301205 v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001206}
1207
1208/**
1209 * v9fs_qid2ino - convert qid into inode number
1210 * @qid: qid to hash
1211 *
1212 * BUG: potential for inode number collisions?
1213 */
1214
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001215ino_t v9fs_qid2ino(struct p9_qid *qid)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001216{
1217 u64 path = qid->path + 2;
1218 ino_t i = 0;
1219
1220 if (sizeof(ino_t) == sizeof(path))
1221 memcpy(&i, &path, sizeof(ino_t));
1222 else
1223 i = (ino_t) (path ^ (path >> 32));
1224
1225 return i;
1226}
1227
1228/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001229 * v9fs_readlink - read a symlink's location (internal version)
1230 * @dentry: dentry for symlink
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001231 * @buffer: buffer to load symlink location into
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001232 * @buflen: length of buffer
1233 *
1234 */
1235
1236static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1237{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001238 int retval;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001239
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001240 struct v9fs_session_info *v9ses;
1241 struct p9_fid *fid;
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -05001242 struct p9_wstat *st;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001243
Joe Perches5d385152011-11-28 10:40:46 -08001244 p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001245 retval = -EPERM;
Aneesh Kumar K.V42869c82011-03-08 16:39:50 +05301246 v9ses = v9fs_dentry2v9ses(dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001247 fid = v9fs_fid_lookup(dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001248 if (IS_ERR(fid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001249 return PTR_ERR(fid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001250
M. Mohan Kumar329176c2010-09-28 19:59:25 +05301251 if (!v9fs_proto_dotu(v9ses))
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001252 return -EBADF;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001253
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001254 st = p9_client_stat(fid);
1255 if (IS_ERR(st))
1256 return PTR_ERR(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001257
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001258 if (!(st->mode & P9_DMSYMLINK)) {
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001259 retval = -EINVAL;
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001260 goto done;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001261 }
1262
1263 /* copy extension buffer into buffer */
Jim Meyeringba413ab2012-08-21 09:20:49 +02001264 retval = min(strlen(st->extension)+1, (size_t)buflen);
1265 memcpy(buffer, st->extension, retval);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001266
Jim Meyeringba413ab2012-08-21 09:20:49 +02001267 p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n",
1268 dentry->d_name.name, st->extension, buflen, buffer);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001269
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001270done:
Latchesar Ionkov62b2be52010-08-24 18:13:59 +00001271 p9stat_free(st);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001272 kfree(st);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001273 return retval;
1274}
1275
1276/**
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001277 * v9fs_vfs_follow_link - follow a symlink path
1278 * @dentry: dentry for symlink
1279 * @nd: nameidata
1280 *
1281 */
1282
1283static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1284{
1285 int len = 0;
1286 char *link = __getname();
1287
Joe Perches5d385152011-11-28 10:40:46 -08001288 p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001289
1290 if (!link)
1291 link = ERR_PTR(-ENOMEM);
1292 else {
Latchesar Ionkov16cce6d2006-03-25 03:07:26 -08001293 len = v9fs_readlink(dentry, link, PATH_MAX);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001294
1295 if (len < 0) {
Davi Arnautce44eeb2005-11-07 00:59:36 -08001296 __putname(link);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001297 link = ERR_PTR(len);
1298 } else
Martin Stava2511cd02009-11-02 08:39:34 -06001299 link[min(len, PATH_MAX-1)] = 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001300 }
1301 nd_set_link(nd, link);
1302
1303 return NULL;
1304}
1305
1306/**
1307 * v9fs_vfs_put_link - release a symlink path
1308 * @dentry: dentry for symlink
1309 * @nd: nameidata
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001310 * @p: unused
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001311 *
1312 */
1313
Aneesh Kumar K.V53c06f42011-01-10 13:51:47 -06001314void
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001315v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001316{
1317 char *s = nd_get_link(nd);
1318
Joe Perches5d385152011-11-28 10:40:46 -08001319 p9_debug(P9_DEBUG_VFS, " %s %s\n",
1320 dentry->d_name.name, IS_ERR(s) ? "<error>" : s);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001321 if (!IS_ERR(s))
Davi Arnautce44eeb2005-11-07 00:59:36 -08001322 __putname(s);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001323}
1324
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001325/**
1326 * v9fs_vfs_mkspecial - create a special file
1327 * @dir: inode to create special file in
1328 * @dentry: dentry to create
1329 * @mode: mode to create special file
1330 * @extension: 9p2000.u format extension string representing special file
1331 *
1332 */
1333
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001334static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
Al Viroc2837de2011-07-24 18:59:07 -04001335 u32 perm, const char *extension)
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001336{
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001337 struct p9_fid *fid;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301338 struct v9fs_session_info *v9ses;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001339
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001340 v9ses = v9fs_inode2v9ses(dir);
Sripathi Kodidd6102f2010-03-05 18:48:00 +00001341 if (!v9fs_proto_dotu(v9ses)) {
Joe Perches5d385152011-11-28 10:40:46 -08001342 p9_debug(P9_DEBUG_ERROR, "not extended\n");
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001343 return -EPERM;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001344 }
1345
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001346 fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
1347 P9_OREAD);
1348 if (IS_ERR(fid))
1349 return PTR_ERR(fid);
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001350
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301351 v9fs_invalidate_inode_attr(dir);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001352 p9_client_clunk(fid);
Latchesar Ionkov6a3124a2006-03-02 02:54:30 -08001353 return 0;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001354}
1355
1356/**
1357 * v9fs_vfs_symlink - helper function to create symlinks
1358 * @dir: directory inode containing symlink
1359 * @dentry: dentry for symlink
1360 * @symname: symlink data
1361 *
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001362 * See Also: 9P2000.u RFC for more information
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001363 *
1364 */
1365
1366static int
1367v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
1368{
Joe Perches5d385152011-11-28 10:40:46 -08001369 p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
1370 dir->i_ino, dentry->d_name.name, symname);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001371
Al Viroc2837de2011-07-24 18:59:07 -04001372 return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001373}
1374
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001375/**
1376 * v9fs_vfs_link - create a hardlink
1377 * @old_dentry: dentry for file to link to
1378 * @dir: inode destination for new link
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001379 * @dentry: dentry for link
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001380 *
1381 */
1382
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001383static int
1384v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1385 struct dentry *dentry)
1386{
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001387 int retval;
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001388 char *name;
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301389 struct p9_fid *oldfid;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001390
Joe Perches5d385152011-11-28 10:40:46 -08001391 p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n",
1392 dir->i_ino, dentry->d_name.name, old_dentry->d_name.name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001393
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001394 oldfid = v9fs_fid_clone(old_dentry);
Latchesar Ionkovba176742007-10-17 14:31:07 -05001395 if (IS_ERR(oldfid))
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001396 return PTR_ERR(oldfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001397
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001398 name = __getname();
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001399 if (unlikely(!name)) {
1400 retval = -ENOMEM;
1401 goto clunk_fid;
1402 }
Florin Malita0710d362006-06-25 05:48:31 -07001403
Latchesar Ionkov16cce6d2006-03-25 03:07:26 -08001404 sprintf(name, "%d\n", oldfid->fid);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001405 retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001406 __putname(name);
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +05301407 if (!retval) {
1408 v9fs_refresh_inode(oldfid, old_dentry->d_inode);
Aneesh Kumar K.Vd28c61f2011-02-28 17:04:08 +05301409 v9fs_invalidate_inode_attr(dir);
Aneesh Kumar K.Vc06c0662011-02-28 17:04:09 +05301410 }
Eric Van Hensbergenda977b22007-01-26 00:57:06 -08001411clunk_fid:
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -05001412 p9_client_clunk(oldfid);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001413 return retval;
1414}
1415
1416/**
1417 * v9fs_vfs_mknod - create a special file
1418 * @dir: inode destination for new link
1419 * @dentry: dentry for file
1420 * @mode: mode for creation
Eric Van Hensbergenee443992008-03-05 07:08:09 -06001421 * @rdev: device associated with special file
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001422 *
1423 */
1424
1425static int
Al Viro1a67aaf2011-07-26 01:52:52 -04001426v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001427{
Al Viroc2837de2011-07-24 18:59:07 -04001428 struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001429 int retval;
1430 char *name;
Al Viroc2837de2011-07-24 18:59:07 -04001431 u32 perm;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001432
Linus Torvalds609eac12012-01-10 15:09:01 -08001433 p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n",
Joe Perches5d385152011-11-28 10:40:46 -08001434 dir->i_ino, dentry->d_name.name, mode,
1435 MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001436
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001437 if (!new_valid_dev(rdev))
1438 return -EINVAL;
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001439
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001440 name = __getname();
Eugene Teoc0291a02006-03-25 03:07:27 -08001441 if (!name)
1442 return -ENOMEM;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001443 /* build extension */
1444 if (S_ISBLK(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001445 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001446 else if (S_ISCHR(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001447 sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev));
Eric Van Hensbergen73c592b2005-09-09 13:04:26 -07001448 else if (S_ISFIFO(mode))
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001449 *name = 0;
Venkateswararao Jujjuri75cc5c92010-05-22 12:20:30 -05001450 else if (S_ISSOCK(mode))
1451 *name = 0;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001452 else {
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001453 __putname(name);
1454 return -EINVAL;
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001455 }
1456
Al Viroc2837de2011-07-24 18:59:07 -04001457 perm = unixmode2p9mode(v9ses, mode);
1458 retval = v9fs_vfs_mkspecial(dir, dentry, perm, name);
Latchesar Ionkov531b1092006-01-08 01:05:00 -08001459 __putname(name);
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001460
1461 return retval;
1462}
1463
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301464int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
1465{
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001466 int umode;
1467 dev_t rdev;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301468 loff_t i_size;
1469 struct p9_wstat *st;
1470 struct v9fs_session_info *v9ses;
1471
1472 v9ses = v9fs_inode2v9ses(inode);
1473 st = p9_client_stat(fid);
1474 if (IS_ERR(st))
1475 return PTR_ERR(st);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001476 /*
1477 * Don't update inode if the file type is different
1478 */
1479 umode = p9mode2unixmode(v9ses, st, &rdev);
1480 if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
1481 goto out;
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301482
1483 spin_lock(&inode->i_lock);
1484 /*
1485 * We don't want to refresh inode->i_size,
1486 * because we may have cached data
1487 */
1488 i_size = inode->i_size;
1489 v9fs_stat2inode(st, inode, inode->i_sb);
1490 if (v9ses->cache)
1491 inode->i_size = i_size;
1492 spin_unlock(&inode->i_lock);
Aneesh Kumar K.V45089142011-07-25 18:06:33 +00001493out:
Aneesh Kumar K.Vb3cbea02011-02-28 17:04:06 +05301494 p9stat_free(st);
1495 kfree(st);
1496 return 0;
1497}
1498
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001499static const struct inode_operations v9fs_dir_inode_operations_dotu = {
1500 .create = v9fs_vfs_create,
1501 .lookup = v9fs_vfs_lookup,
Miklos Szeredie43ae792012-06-05 15:10:26 +02001502 .atomic_open = v9fs_vfs_atomic_open,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001503 .symlink = v9fs_vfs_symlink,
Venkateswararao Jujjuri (JV)50cc42f2010-06-09 15:59:31 -07001504 .link = v9fs_vfs_link,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001505 .unlink = v9fs_vfs_unlink,
1506 .mkdir = v9fs_vfs_mkdir,
1507 .rmdir = v9fs_vfs_rmdir,
Aneesh Kumar K.V1d76e312010-08-30 17:43:07 +00001508 .mknod = v9fs_vfs_mknod,
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001509 .rename = v9fs_vfs_rename,
1510 .getattr = v9fs_vfs_getattr,
1511 .setattr = v9fs_vfs_setattr,
1512};
1513
Arjan van de Ven754661f2007-02-12 00:55:38 -08001514static const struct inode_operations v9fs_dir_inode_operations = {
Eric Van Hensbergenb5016112005-09-09 13:04:27 -07001515 .create = v9fs_vfs_create,
1516 .lookup = v9fs_vfs_lookup,
Miklos Szeredie43ae792012-06-05 15:10:26 +02001517 .atomic_open = v9fs_vfs_atomic_open,
Eric Van Hensbergenb5016112005-09-09 13:04:27 -07001518 .unlink = v9fs_vfs_unlink,
1519 .mkdir = v9fs_vfs_mkdir,
1520 .rmdir = v9fs_vfs_rmdir,
1521 .mknod = v9fs_vfs_mknod,
1522 .rename = v9fs_vfs_rename,
1523 .getattr = v9fs_vfs_getattr,
1524 .setattr = v9fs_vfs_setattr,
1525};
1526
Arjan van de Ven754661f2007-02-12 00:55:38 -08001527static const struct inode_operations v9fs_file_inode_operations = {
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001528 .getattr = v9fs_vfs_getattr,
1529 .setattr = v9fs_vfs_setattr,
1530};
1531
Arjan van de Ven754661f2007-02-12 00:55:38 -08001532static const struct inode_operations v9fs_symlink_inode_operations = {
Al Viro204f2f02009-12-23 00:35:54 -05001533 .readlink = generic_readlink,
Eric Van Hensbergen2bad8472005-09-09 13:04:19 -07001534 .follow_link = v9fs_vfs_follow_link,
1535 .put_link = v9fs_vfs_put_link,
1536 .getattr = v9fs_vfs_getattr,
1537 .setattr = v9fs_vfs_setattr,
1538};
Sripathi Kodi9b6533c2010-03-25 12:41:54 +00001539