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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
5 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/errno.h>
11#include <linux/fs.h>
12#include <linux/file.h>
13#include <linux/stat.h>
14#include <linux/string.h>
15#include <linux/inet.h>
16#include <linux/pagemap.h>
17#include <linux/mount.h>
18#include <linux/sched.h>
19#include <linux/slab.h>
20#include <linux/statfs.h>
21#include <linux/magic.h>
22#include <linux/fscache.h>
23#include <net/9p/9p.h>
24#include <net/9p/client.h>
25
26#include "v9fs.h"
27#include "v9fs_vfs.h"
28#include "fid.h"
29#include "xattr.h"
30#include "acl.h"
31
32static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl;
33
34/**
35 * v9fs_set_super - set the superblock
36 * @s: super block
37 * @data: file system specific data
38 *
39 */
40
41static int v9fs_set_super(struct super_block *s, void *data)
42{
43 s->s_fs_info = data;
44 return set_anon_super(s, data);
45}
46
47/**
48 * v9fs_fill_super - populate superblock with info
49 * @sb: superblock
50 * @v9ses: session information
51 * @flags: flags propagated from v9fs_mount()
52 *
53 */
54
55static int
56v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
57 int flags)
58{
59 int ret;
60
61 sb->s_maxbytes = MAX_LFS_FILESIZE;
62 sb->s_blocksize_bits = fls(v9ses->maxdata - 1);
63 sb->s_blocksize = 1 << sb->s_blocksize_bits;
64 sb->s_magic = V9FS_MAGIC;
65 if (v9fs_proto_dotl(v9ses)) {
66 sb->s_op = &v9fs_super_ops_dotl;
67 sb->s_xattr = v9fs_xattr_handlers;
68 } else {
69 sb->s_op = &v9fs_super_ops;
70 sb->s_time_max = U32_MAX;
71 }
72
73 sb->s_time_min = 0;
74
75 ret = super_setup_bdi(sb);
76 if (ret)
77 return ret;
78
79 if (!v9ses->cache) {
80 sb->s_bdi->ra_pages = 0;
81 sb->s_bdi->io_pages = 0;
82 } else {
83 sb->s_bdi->ra_pages = v9ses->maxdata >> PAGE_SHIFT;
84 sb->s_bdi->io_pages = v9ses->maxdata >> PAGE_SHIFT;
85 }
86
87 sb->s_flags |= SB_ACTIVE | SB_DIRSYNC;
88 if (!v9ses->cache)
89 sb->s_flags |= SB_SYNCHRONOUS;
90
91#ifdef CONFIG_9P_FS_POSIX_ACL
92 if ((v9ses->flags & V9FS_ACL_MASK) == V9FS_POSIX_ACL)
93 sb->s_flags |= SB_POSIXACL;
94#endif
95
96 return 0;
97}
98
99/**
100 * v9fs_mount - mount a superblock
101 * @fs_type: file system type
102 * @flags: mount flags
103 * @dev_name: device name that was mounted
104 * @data: mount options
105 *
106 */
107
108static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
109 const char *dev_name, void *data)
110{
111 struct super_block *sb = NULL;
112 struct inode *inode = NULL;
113 struct dentry *root = NULL;
114 struct v9fs_session_info *v9ses = NULL;
115 umode_t mode = 0777 | S_ISVTX;
116 struct p9_fid *fid;
117 int retval = 0;
118
119 p9_debug(P9_DEBUG_VFS, "\n");
120
121 v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
122 if (!v9ses)
123 return ERR_PTR(-ENOMEM);
124
125 fid = v9fs_session_init(v9ses, dev_name, data);
126 if (IS_ERR(fid)) {
127 retval = PTR_ERR(fid);
128 goto free_session;
129 }
130
131 sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
132 if (IS_ERR(sb)) {
133 retval = PTR_ERR(sb);
134 goto clunk_fid;
135 }
136 retval = v9fs_fill_super(sb, v9ses, flags);
137 if (retval)
138 goto release_sb;
139
140 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
141 sb->s_d_op = &v9fs_cached_dentry_operations;
142 else
143 sb->s_d_op = &v9fs_dentry_operations;
144
145 inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
146 if (IS_ERR(inode)) {
147 retval = PTR_ERR(inode);
148 goto release_sb;
149 }
150
151 root = d_make_root(inode);
152 if (!root) {
153 retval = -ENOMEM;
154 goto release_sb;
155 }
156 sb->s_root = root;
157 if (v9fs_proto_dotl(v9ses)) {
158 struct p9_stat_dotl *st = NULL;
159
160 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
161 if (IS_ERR(st)) {
162 retval = PTR_ERR(st);
163 goto release_sb;
164 }
165 d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
166 v9fs_stat2inode_dotl(st, d_inode(root), 0);
167 kfree(st);
168 } else {
169 struct p9_wstat *st = NULL;
170
171 st = p9_client_stat(fid);
172 if (IS_ERR(st)) {
173 retval = PTR_ERR(st);
174 goto release_sb;
175 }
176
177 d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
178 v9fs_stat2inode(st, d_inode(root), sb, 0);
179
180 p9stat_free(st);
181 kfree(st);
182 }
183 retval = v9fs_get_acl(inode, fid);
184 if (retval)
185 goto release_sb;
186 v9fs_fid_add(root, &fid);
187
188 p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
189 return dget(sb->s_root);
190
191clunk_fid:
192 p9_fid_put(fid);
193 v9fs_session_close(v9ses);
194free_session:
195 kfree(v9ses);
196 return ERR_PTR(retval);
197
198release_sb:
199 /*
200 * we will do the session_close and root dentry release
201 * in the below call. But we need to clunk fid, because we haven't
202 * attached the fid to dentry so it won't get clunked
203 * automatically.
204 */
205 p9_fid_put(fid);
206 deactivate_locked_super(sb);
207 return ERR_PTR(retval);
208}
209
210/**
211 * v9fs_kill_super - Kill Superblock
212 * @s: superblock
213 *
214 */
215
216static void v9fs_kill_super(struct super_block *s)
217{
218 struct v9fs_session_info *v9ses = s->s_fs_info;
219
220 p9_debug(P9_DEBUG_VFS, " %p\n", s);
221
222 kill_anon_super(s);
223
224 v9fs_session_cancel(v9ses);
225 v9fs_session_close(v9ses);
226 kfree(v9ses);
227 s->s_fs_info = NULL;
228 p9_debug(P9_DEBUG_VFS, "exiting kill_super\n");
229}
230
231static void
232v9fs_umount_begin(struct super_block *sb)
233{
234 struct v9fs_session_info *v9ses;
235
236 v9ses = sb->s_fs_info;
237 v9fs_session_begin_cancel(v9ses);
238}
239
240static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
241{
242 struct v9fs_session_info *v9ses;
243 struct p9_fid *fid;
244 struct p9_rstatfs rs;
245 int res;
246
247 fid = v9fs_fid_lookup(dentry);
248 if (IS_ERR(fid)) {
249 res = PTR_ERR(fid);
250 goto done;
251 }
252
253 v9ses = v9fs_dentry2v9ses(dentry);
254 if (v9fs_proto_dotl(v9ses)) {
255 res = p9_client_statfs(fid, &rs);
256 if (res == 0) {
257 buf->f_type = rs.type;
258 buf->f_bsize = rs.bsize;
259 buf->f_blocks = rs.blocks;
260 buf->f_bfree = rs.bfree;
261 buf->f_bavail = rs.bavail;
262 buf->f_files = rs.files;
263 buf->f_ffree = rs.ffree;
264 buf->f_fsid = u64_to_fsid(rs.fsid);
265 buf->f_namelen = rs.namelen;
266 }
267 if (res != -ENOSYS)
268 goto done;
269 }
270 res = simple_statfs(dentry, buf);
271done:
272 p9_fid_put(fid);
273 return res;
274}
275
276static int v9fs_drop_inode(struct inode *inode)
277{
278 struct v9fs_session_info *v9ses;
279
280 v9ses = v9fs_inode2v9ses(inode);
281 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
282 return generic_drop_inode(inode);
283 /*
284 * in case of non cached mode always drop the
285 * inode because we want the inode attribute
286 * to always match that on the server.
287 */
288 return 1;
289}
290
291static int v9fs_write_inode(struct inode *inode,
292 struct writeback_control *wbc)
293{
294 int ret;
295 struct p9_wstat wstat;
296 struct v9fs_inode *v9inode;
297 /*
298 * send an fsync request to server irrespective of
299 * wbc->sync_mode.
300 */
301 p9_debug(P9_DEBUG_VFS, "%s: inode %p\n", __func__, inode);
302 v9inode = V9FS_I(inode);
303 if (!v9inode->writeback_fid)
304 return 0;
305 v9fs_blank_wstat(&wstat);
306
307 ret = p9_client_wstat(v9inode->writeback_fid, &wstat);
308 if (ret < 0) {
309 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
310 return ret;
311 }
312 fscache_unpin_writeback(wbc, v9fs_inode_cookie(v9inode));
313 return 0;
314}
315
316static int v9fs_write_inode_dotl(struct inode *inode,
317 struct writeback_control *wbc)
318{
319 int ret;
320 struct v9fs_inode *v9inode;
321 /*
322 * send an fsync request to server irrespective of
323 * wbc->sync_mode.
324 */
325 v9inode = V9FS_I(inode);
326 p9_debug(P9_DEBUG_VFS, "%s: inode %p, writeback_fid %p\n",
327 __func__, inode, v9inode->writeback_fid);
328 if (!v9inode->writeback_fid)
329 return 0;
330
331 ret = p9_client_fsync(v9inode->writeback_fid, 0);
332 if (ret < 0) {
333 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
334 return ret;
335 }
336 fscache_unpin_writeback(wbc, v9fs_inode_cookie(v9inode));
337 return 0;
338}
339
340static const struct super_operations v9fs_super_ops = {
341 .alloc_inode = v9fs_alloc_inode,
342 .free_inode = v9fs_free_inode,
343 .statfs = simple_statfs,
344 .evict_inode = v9fs_evict_inode,
345 .show_options = v9fs_show_options,
346 .umount_begin = v9fs_umount_begin,
347 .write_inode = v9fs_write_inode,
348};
349
350static const struct super_operations v9fs_super_ops_dotl = {
351 .alloc_inode = v9fs_alloc_inode,
352 .free_inode = v9fs_free_inode,
353 .statfs = v9fs_statfs,
354 .drop_inode = v9fs_drop_inode,
355 .evict_inode = v9fs_evict_inode,
356 .show_options = v9fs_show_options,
357 .umount_begin = v9fs_umount_begin,
358 .write_inode = v9fs_write_inode_dotl,
359};
360
361struct file_system_type v9fs_fs_type = {
362 .name = "9p",
363 .mount = v9fs_mount,
364 .kill_sb = v9fs_kill_super,
365 .owner = THIS_MODULE,
366 .fs_flags = FS_RENAME_DOES_D_MOVE,
367};
368MODULE_ALIAS_FS("9p");
1/*
2 * linux/fs/9p/vfs_super.c
3 *
4 * This file contians superblock ops for 9P2000. It is intended that
5 * you mount this file system on directories.
6 *
7 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
8 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to:
21 * Free Software Foundation
22 * 51 Franklin Street, Fifth Floor
23 * Boston, MA 02111-1301 USA
24 *
25 */
26
27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/errno.h>
30#include <linux/fs.h>
31#include <linux/file.h>
32#include <linux/stat.h>
33#include <linux/string.h>
34#include <linux/inet.h>
35#include <linux/pagemap.h>
36#include <linux/seq_file.h>
37#include <linux/mount.h>
38#include <linux/idr.h>
39#include <linux/sched.h>
40#include <linux/slab.h>
41#include <linux/statfs.h>
42#include <linux/magic.h>
43#include <net/9p/9p.h>
44#include <net/9p/client.h>
45
46#include "v9fs.h"
47#include "v9fs_vfs.h"
48#include "fid.h"
49#include "xattr.h"
50#include "acl.h"
51
52static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl;
53
54/**
55 * v9fs_set_super - set the superblock
56 * @s: super block
57 * @data: file system specific data
58 *
59 */
60
61static int v9fs_set_super(struct super_block *s, void *data)
62{
63 s->s_fs_info = data;
64 return set_anon_super(s, data);
65}
66
67/**
68 * v9fs_fill_super - populate superblock with info
69 * @sb: superblock
70 * @v9ses: session information
71 * @flags: flags propagated from v9fs_mount()
72 *
73 */
74
75static void
76v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
77 int flags, void *data)
78{
79 sb->s_maxbytes = MAX_LFS_FILESIZE;
80 sb->s_blocksize_bits = fls(v9ses->maxdata - 1);
81 sb->s_blocksize = 1 << sb->s_blocksize_bits;
82 sb->s_magic = V9FS_MAGIC;
83 if (v9fs_proto_dotl(v9ses)) {
84 sb->s_op = &v9fs_super_ops_dotl;
85 sb->s_xattr = v9fs_xattr_handlers;
86 } else
87 sb->s_op = &v9fs_super_ops;
88 sb->s_bdi = &v9ses->bdi;
89 if (v9ses->cache)
90 sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_SIZE;
91
92 sb->s_flags |= MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
93 if (!v9ses->cache)
94 sb->s_flags |= MS_SYNCHRONOUS;
95
96#ifdef CONFIG_9P_FS_POSIX_ACL
97 if ((v9ses->flags & V9FS_ACL_MASK) == V9FS_POSIX_ACL)
98 sb->s_flags |= MS_POSIXACL;
99#endif
100
101 save_mount_options(sb, data);
102}
103
104/**
105 * v9fs_mount - mount a superblock
106 * @fs_type: file system type
107 * @flags: mount flags
108 * @dev_name: device name that was mounted
109 * @data: mount options
110 *
111 */
112
113static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
114 const char *dev_name, void *data)
115{
116 struct super_block *sb = NULL;
117 struct inode *inode = NULL;
118 struct dentry *root = NULL;
119 struct v9fs_session_info *v9ses = NULL;
120 umode_t mode = S_IRWXUGO | S_ISVTX;
121 struct p9_fid *fid;
122 int retval = 0;
123
124 p9_debug(P9_DEBUG_VFS, "\n");
125
126 v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
127 if (!v9ses)
128 return ERR_PTR(-ENOMEM);
129
130 fid = v9fs_session_init(v9ses, dev_name, data);
131 if (IS_ERR(fid)) {
132 retval = PTR_ERR(fid);
133 goto free_session;
134 }
135
136 sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
137 if (IS_ERR(sb)) {
138 retval = PTR_ERR(sb);
139 goto clunk_fid;
140 }
141 v9fs_fill_super(sb, v9ses, flags, data);
142
143 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
144 sb->s_d_op = &v9fs_cached_dentry_operations;
145 else
146 sb->s_d_op = &v9fs_dentry_operations;
147
148 inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
149 if (IS_ERR(inode)) {
150 retval = PTR_ERR(inode);
151 goto release_sb;
152 }
153
154 root = d_make_root(inode);
155 if (!root) {
156 retval = -ENOMEM;
157 goto release_sb;
158 }
159 sb->s_root = root;
160 if (v9fs_proto_dotl(v9ses)) {
161 struct p9_stat_dotl *st = NULL;
162 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
163 if (IS_ERR(st)) {
164 retval = PTR_ERR(st);
165 goto release_sb;
166 }
167 d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
168 v9fs_stat2inode_dotl(st, d_inode(root));
169 kfree(st);
170 } else {
171 struct p9_wstat *st = NULL;
172 st = p9_client_stat(fid);
173 if (IS_ERR(st)) {
174 retval = PTR_ERR(st);
175 goto release_sb;
176 }
177
178 d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
179 v9fs_stat2inode(st, d_inode(root), sb);
180
181 p9stat_free(st);
182 kfree(st);
183 }
184 retval = v9fs_get_acl(inode, fid);
185 if (retval)
186 goto release_sb;
187 v9fs_fid_add(root, fid);
188
189 p9_debug(P9_DEBUG_VFS, " simple set mount, return 0\n");
190 return dget(sb->s_root);
191
192clunk_fid:
193 p9_client_clunk(fid);
194 v9fs_session_close(v9ses);
195free_session:
196 kfree(v9ses);
197 return ERR_PTR(retval);
198
199release_sb:
200 /*
201 * we will do the session_close and root dentry release
202 * in the below call. But we need to clunk fid, because we haven't
203 * attached the fid to dentry so it won't get clunked
204 * automatically.
205 */
206 p9_client_clunk(fid);
207 deactivate_locked_super(sb);
208 return ERR_PTR(retval);
209}
210
211/**
212 * v9fs_kill_super - Kill Superblock
213 * @s: superblock
214 *
215 */
216
217static void v9fs_kill_super(struct super_block *s)
218{
219 struct v9fs_session_info *v9ses = s->s_fs_info;
220
221 p9_debug(P9_DEBUG_VFS, " %p\n", s);
222
223 kill_anon_super(s);
224
225 v9fs_session_cancel(v9ses);
226 v9fs_session_close(v9ses);
227 kfree(v9ses);
228 s->s_fs_info = NULL;
229 p9_debug(P9_DEBUG_VFS, "exiting kill_super\n");
230}
231
232static void
233v9fs_umount_begin(struct super_block *sb)
234{
235 struct v9fs_session_info *v9ses;
236
237 v9ses = sb->s_fs_info;
238 v9fs_session_begin_cancel(v9ses);
239}
240
241static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf)
242{
243 struct v9fs_session_info *v9ses;
244 struct p9_fid *fid;
245 struct p9_rstatfs rs;
246 int res;
247
248 fid = v9fs_fid_lookup(dentry);
249 if (IS_ERR(fid)) {
250 res = PTR_ERR(fid);
251 goto done;
252 }
253
254 v9ses = v9fs_dentry2v9ses(dentry);
255 if (v9fs_proto_dotl(v9ses)) {
256 res = p9_client_statfs(fid, &rs);
257 if (res == 0) {
258 buf->f_type = rs.type;
259 buf->f_bsize = rs.bsize;
260 buf->f_blocks = rs.blocks;
261 buf->f_bfree = rs.bfree;
262 buf->f_bavail = rs.bavail;
263 buf->f_files = rs.files;
264 buf->f_ffree = rs.ffree;
265 buf->f_fsid.val[0] = rs.fsid & 0xFFFFFFFFUL;
266 buf->f_fsid.val[1] = (rs.fsid >> 32) & 0xFFFFFFFFUL;
267 buf->f_namelen = rs.namelen;
268 }
269 if (res != -ENOSYS)
270 goto done;
271 }
272 res = simple_statfs(dentry, buf);
273done:
274 return res;
275}
276
277static int v9fs_drop_inode(struct inode *inode)
278{
279 struct v9fs_session_info *v9ses;
280 v9ses = v9fs_inode2v9ses(inode);
281 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
282 return generic_drop_inode(inode);
283 /*
284 * in case of non cached mode always drop the
285 * the inode because we want the inode attribute
286 * to always match that on the server.
287 */
288 return 1;
289}
290
291static int v9fs_write_inode(struct inode *inode,
292 struct writeback_control *wbc)
293{
294 int ret;
295 struct p9_wstat wstat;
296 struct v9fs_inode *v9inode;
297 /*
298 * send an fsync request to server irrespective of
299 * wbc->sync_mode.
300 */
301 p9_debug(P9_DEBUG_VFS, "%s: inode %p\n", __func__, inode);
302 v9inode = V9FS_I(inode);
303 if (!v9inode->writeback_fid)
304 return 0;
305 v9fs_blank_wstat(&wstat);
306
307 ret = p9_client_wstat(v9inode->writeback_fid, &wstat);
308 if (ret < 0) {
309 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
310 return ret;
311 }
312 return 0;
313}
314
315static int v9fs_write_inode_dotl(struct inode *inode,
316 struct writeback_control *wbc)
317{
318 int ret;
319 struct v9fs_inode *v9inode;
320 /*
321 * send an fsync request to server irrespective of
322 * wbc->sync_mode.
323 */
324 v9inode = V9FS_I(inode);
325 p9_debug(P9_DEBUG_VFS, "%s: inode %p, writeback_fid %p\n",
326 __func__, inode, v9inode->writeback_fid);
327 if (!v9inode->writeback_fid)
328 return 0;
329
330 ret = p9_client_fsync(v9inode->writeback_fid, 0);
331 if (ret < 0) {
332 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
333 return ret;
334 }
335 return 0;
336}
337
338static const struct super_operations v9fs_super_ops = {
339 .alloc_inode = v9fs_alloc_inode,
340 .destroy_inode = v9fs_destroy_inode,
341 .statfs = simple_statfs,
342 .evict_inode = v9fs_evict_inode,
343 .show_options = generic_show_options,
344 .umount_begin = v9fs_umount_begin,
345 .write_inode = v9fs_write_inode,
346};
347
348static const struct super_operations v9fs_super_ops_dotl = {
349 .alloc_inode = v9fs_alloc_inode,
350 .destroy_inode = v9fs_destroy_inode,
351 .statfs = v9fs_statfs,
352 .drop_inode = v9fs_drop_inode,
353 .evict_inode = v9fs_evict_inode,
354 .show_options = generic_show_options,
355 .umount_begin = v9fs_umount_begin,
356 .write_inode = v9fs_write_inode_dotl,
357};
358
359struct file_system_type v9fs_fs_type = {
360 .name = "9p",
361 .mount = v9fs_mount,
362 .kill_sb = v9fs_kill_super,
363 .owner = THIS_MODULE,
364 .fs_flags = FS_RENAME_DOES_D_MOVE,
365};
366MODULE_ALIAS_FS("9p");