xref: /openbmc/linux/fs/9p/vfs_inode.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  *  linux/fs/9p/vfs_inode.c
3  *
4  * This file contains vfs inode ops for the 9P2000 protocol.
5  *
6  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
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/module.h>
28 #include <linux/errno.h>
29 #include <linux/fs.h>
30 #include <linux/file.h>
31 #include <linux/pagemap.h>
32 #include <linux/stat.h>
33 #include <linux/string.h>
34 #include <linux/smp_lock.h>
35 #include <linux/inet.h>
36 #include <linux/namei.h>
37 #include <linux/idr.h>
38 
39 #include "debug.h"
40 #include "v9fs.h"
41 #include "9p.h"
42 #include "v9fs_vfs.h"
43 #include "conv.h"
44 #include "fid.h"
45 
46 static struct inode_operations v9fs_dir_inode_operations;
47 static struct inode_operations v9fs_dir_inode_operations_ext;
48 static struct inode_operations v9fs_file_inode_operations;
49 static struct inode_operations v9fs_symlink_inode_operations;
50 
51 /**
52  * unixmode2p9mode - convert unix mode bits to plan 9
53  * @v9ses: v9fs session information
54  * @mode: mode to convert
55  *
56  */
57 
58 static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
59 {
60 	int res;
61 	res = mode & 0777;
62 	if (S_ISDIR(mode))
63 		res |= V9FS_DMDIR;
64 	if (v9ses->extended) {
65 		if (S_ISLNK(mode))
66 			res |= V9FS_DMSYMLINK;
67 		if (v9ses->nodev == 0) {
68 			if (S_ISSOCK(mode))
69 				res |= V9FS_DMSOCKET;
70 			if (S_ISFIFO(mode))
71 				res |= V9FS_DMNAMEDPIPE;
72 			if (S_ISBLK(mode))
73 				res |= V9FS_DMDEVICE;
74 			if (S_ISCHR(mode))
75 				res |= V9FS_DMDEVICE;
76 		}
77 
78 		if ((mode & S_ISUID) == S_ISUID)
79 			res |= V9FS_DMSETUID;
80 		if ((mode & S_ISGID) == S_ISGID)
81 			res |= V9FS_DMSETGID;
82 		if ((mode & V9FS_DMLINK))
83 			res |= V9FS_DMLINK;
84 	}
85 
86 	return res;
87 }
88 
89 /**
90  * p9mode2unixmode- convert plan9 mode bits to unix mode bits
91  * @v9ses: v9fs session information
92  * @mode: mode to convert
93  *
94  */
95 
96 static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
97 {
98 	int res;
99 
100 	res = mode & 0777;
101 
102 	if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
103 		res |= S_IFDIR;
104 	else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
105 		res |= S_IFLNK;
106 	else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
107 		 && (v9ses->nodev == 0))
108 		res |= S_IFSOCK;
109 	else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
110 		 && (v9ses->nodev == 0))
111 		res |= S_IFIFO;
112 	else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
113 		 && (v9ses->nodev == 0))
114 		res |= S_IFBLK;
115 	else
116 		res |= S_IFREG;
117 
118 	if (v9ses->extended) {
119 		if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
120 			res |= S_ISUID;
121 
122 		if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
123 			res |= S_ISGID;
124 	}
125 
126 	return res;
127 }
128 
129 /**
130  * v9fs_blank_mistat - helper function to setup a 9P stat structure
131  * @v9ses: 9P session info (for determining extended mode)
132  * @mistat: structure to initialize
133  *
134  */
135 
136 static void
137 v9fs_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat)
138 {
139 	mistat->type = ~0;
140 	mistat->dev = ~0;
141 	mistat->qid.type = ~0;
142 	mistat->qid.version = ~0;
143 	*((long long *)&mistat->qid.path) = ~0;
144 	mistat->mode = ~0;
145 	mistat->atime = ~0;
146 	mistat->mtime = ~0;
147 	mistat->length = ~0;
148 	mistat->name = mistat->data;
149 	mistat->uid = mistat->data;
150 	mistat->gid = mistat->data;
151 	mistat->muid = mistat->data;
152 	if (v9ses->extended) {
153 		mistat->n_uid = ~0;
154 		mistat->n_gid = ~0;
155 		mistat->n_muid = ~0;
156 		mistat->extension = mistat->data;
157 	}
158 	*mistat->data = 0;
159 }
160 
161 /**
162  * v9fs_mistat2unix - convert mistat to unix stat
163  * @mistat: Plan 9 metadata (mistat) structure
164  * @buf: unix metadata (stat) structure to populate
165  * @sb: superblock
166  *
167  */
168 
169 static void
170 v9fs_mistat2unix(struct v9fs_stat *mistat, struct stat *buf,
171 		 struct super_block *sb)
172 {
173 	struct v9fs_session_info *v9ses = sb ? sb->s_fs_info : NULL;
174 
175 	buf->st_nlink = 1;
176 
177 	buf->st_atime = mistat->atime;
178 	buf->st_mtime = mistat->mtime;
179 	buf->st_ctime = mistat->mtime;
180 
181 	buf->st_uid = (unsigned short)-1;
182 	buf->st_gid = (unsigned short)-1;
183 
184 	if (v9ses && v9ses->extended) {
185 		/* TODO: string to uid mapping via user-space daemon */
186 		if (mistat->n_uid != -1)
187 			sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid);
188 
189 		if (mistat->n_gid != -1)
190 			sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid);
191 	}
192 
193 	if (buf->st_uid == (unsigned short)-1)
194 		buf->st_uid = v9ses->uid;
195 	if (buf->st_gid == (unsigned short)-1)
196 		buf->st_gid = v9ses->gid;
197 
198 	buf->st_mode = p9mode2unixmode(v9ses, mistat->mode);
199 	if ((S_ISBLK(buf->st_mode)) || (S_ISCHR(buf->st_mode))) {
200 		char type = 0;
201 		int major = -1;
202 		int minor = -1;
203 		sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
204 		switch (type) {
205 		case 'c':
206 			buf->st_mode &= ~S_IFBLK;
207 			buf->st_mode |= S_IFCHR;
208 			break;
209 		case 'b':
210 			break;
211 		default:
212 			dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
213 				type, mistat->extension);
214 		};
215 		buf->st_rdev = MKDEV(major, minor);
216 	} else
217 		buf->st_rdev = 0;
218 
219 	buf->st_size = mistat->length;
220 
221 	buf->st_blksize = sb->s_blocksize;
222 	buf->st_blocks =
223 	    (buf->st_size + buf->st_blksize - 1) >> sb->s_blocksize_bits;
224 }
225 
226 /**
227  * v9fs_get_inode - helper function to setup an inode
228  * @sb: superblock
229  * @mode: mode to setup inode with
230  *
231  */
232 
233 struct inode *v9fs_get_inode(struct super_block *sb, int mode)
234 {
235 	struct inode *inode = NULL;
236 	struct v9fs_session_info *v9ses = sb->s_fs_info;
237 
238 	dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
239 
240 	inode = new_inode(sb);
241 	if (inode) {
242 		inode->i_mode = mode;
243 		inode->i_uid = current->fsuid;
244 		inode->i_gid = current->fsgid;
245 		inode->i_blksize = sb->s_blocksize;
246 		inode->i_blocks = 0;
247 		inode->i_rdev = 0;
248 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
249 
250 		switch (mode & S_IFMT) {
251 		case S_IFIFO:
252 		case S_IFBLK:
253 		case S_IFCHR:
254 		case S_IFSOCK:
255 			if(!v9ses->extended) {
256 				dprintk(DEBUG_ERROR, "special files without extended mode\n");
257 				return ERR_PTR(-EINVAL);
258 			}
259 			init_special_inode(inode, inode->i_mode,
260 					   inode->i_rdev);
261 			break;
262 		case S_IFREG:
263 			inode->i_op = &v9fs_file_inode_operations;
264 			inode->i_fop = &v9fs_file_operations;
265 			break;
266 		case S_IFLNK:
267 			if(!v9ses->extended) {
268 				dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
269 				return ERR_PTR(-EINVAL);
270 			}
271 			inode->i_op = &v9fs_symlink_inode_operations;
272 			break;
273 		case S_IFDIR:
274 			inode->i_nlink++;
275 			if(v9ses->extended)
276 				inode->i_op = &v9fs_dir_inode_operations_ext;
277 			else
278 				inode->i_op = &v9fs_dir_inode_operations;
279 			inode->i_fop = &v9fs_dir_operations;
280 			break;
281 		default:
282 			dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
283 				mode, mode & S_IFMT);
284 			return ERR_PTR(-EINVAL);
285 		}
286 	} else {
287 		eprintk(KERN_WARNING, "Problem allocating inode\n");
288 		return ERR_PTR(-ENOMEM);
289 	}
290 	return inode;
291 }
292 
293 /**
294  * v9fs_create - helper function to create files and directories
295  * @dir: directory inode file is being created in
296  * @file_dentry: dentry file is being created in
297  * @perm: permissions file is being created with
298  * @open_mode: resulting open mode for file
299  *
300  */
301 
302 static int
303 v9fs_create(struct inode *dir,
304 	    struct dentry *file_dentry,
305 	    unsigned int perm, unsigned int open_mode)
306 {
307 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
308 	struct super_block *sb = dir->i_sb;
309 	struct v9fs_fid *dirfid =
310 	    v9fs_fid_lookup(file_dentry->d_parent);
311 	struct v9fs_fid *fid = NULL;
312 	struct inode *file_inode = NULL;
313 	struct v9fs_fcall *fcall = NULL;
314 	struct v9fs_qid qid;
315 	struct stat newstat;
316 	int dirfidnum = -1;
317 	long newfid = -1;
318 	int result = 0;
319 	unsigned int iounit = 0;
320 	int wfidno = -1;
321 
322 	perm = unixmode2p9mode(v9ses, perm);
323 
324 	dprintk(DEBUG_VFS, "dir: %p dentry: %p perm: %o mode: %o\n", dir,
325 		file_dentry, perm, open_mode);
326 
327 	if (!dirfid)
328 		return -EBADF;
329 
330 	dirfidnum = dirfid->fid;
331 	if (dirfidnum < 0) {
332 		dprintk(DEBUG_ERROR, "No fid for the directory #%lu\n",
333 			dir->i_ino);
334 		return -EBADF;
335 	}
336 
337 	if (file_dentry->d_inode) {
338 		dprintk(DEBUG_ERROR,
339 			"Odd. There is an inode for dir %lu, name :%s:\n",
340 			dir->i_ino, file_dentry->d_name.name);
341 		return -EEXIST;
342 	}
343 
344 	newfid = v9fs_get_idpool(&v9ses->fidpool);
345 	if (newfid < 0) {
346 		eprintk(KERN_WARNING, "no free fids available\n");
347 		return -ENOSPC;
348 	}
349 
350 	result = v9fs_t_walk(v9ses, dirfidnum, newfid, NULL, &fcall);
351 	if (result < 0) {
352 		dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
353 		v9fs_put_idpool(newfid, &v9ses->fidpool);
354 		newfid = -1;
355 		goto CleanUpFid;
356 	}
357 
358 	kfree(fcall);
359 
360 	result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name,
361 			       perm, open_mode, &fcall);
362 	if (result < 0) {
363 		dprintk(DEBUG_ERROR, "create fails: %s(%d)\n",
364 			FCALL_ERROR(fcall), result);
365 
366 		goto CleanUpFid;
367 	}
368 
369 	iounit = fcall->params.rcreate.iounit;
370 	qid = fcall->params.rcreate.qid;
371 	kfree(fcall);
372 
373 	fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
374 	dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
375 	if (!fid) {
376 		result = -ENOMEM;
377 		goto CleanUpFid;
378 	}
379 
380 	fid->qid = qid;
381 	fid->iounit = iounit;
382 
383 	/* walk to the newly created file and put the fid in the dentry */
384 	wfidno = v9fs_get_idpool(&v9ses->fidpool);
385 	if (newfid < 0) {
386 		eprintk(KERN_WARNING, "no free fids available\n");
387 		return -ENOSPC;
388 	}
389 
390 	result = v9fs_t_walk(v9ses, dirfidnum, wfidno,
391 		(char *) file_dentry->d_name.name, NULL);
392 	if (result < 0) {
393 		dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
394 		v9fs_put_idpool(wfidno, &v9ses->fidpool);
395 		wfidno = -1;
396 		goto CleanUpFid;
397 	}
398 
399 	if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) {
400 		if (!v9fs_t_clunk(v9ses, newfid, &fcall)) {
401 			v9fs_put_idpool(wfidno, &v9ses->fidpool);
402 		}
403 
404 		goto CleanUpFid;
405 	}
406 
407 	if ((perm & V9FS_DMSYMLINK) || (perm & V9FS_DMLINK) ||
408 	    (perm & V9FS_DMNAMEDPIPE) || (perm & V9FS_DMSOCKET) ||
409 	    (perm & V9FS_DMDEVICE))
410 		return 0;
411 
412 	result = v9fs_t_stat(v9ses, newfid, &fcall);
413 	if (result < 0) {
414 		dprintk(DEBUG_ERROR, "stat error: %s(%d)\n", FCALL_ERROR(fcall),
415 			result);
416 		goto CleanUpFid;
417 	}
418 
419 	v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
420 
421 	file_inode = v9fs_get_inode(sb, newstat.st_mode);
422 	if ((!file_inode) || IS_ERR(file_inode)) {
423 		dprintk(DEBUG_ERROR, "create inode failed\n");
424 		result = -EBADF;
425 		goto CleanUpFid;
426 	}
427 
428 	v9fs_mistat2inode(fcall->params.rstat.stat, file_inode, sb);
429 	kfree(fcall);
430 	d_instantiate(file_dentry, file_inode);
431 
432 	if (perm & V9FS_DMDIR) {
433 		if (!v9fs_t_clunk(v9ses, newfid, &fcall))
434 			v9fs_put_idpool(newfid, &v9ses->fidpool);
435 		else
436 			dprintk(DEBUG_ERROR, "clunk for mkdir failed: %s\n",
437 				FCALL_ERROR(fcall));
438 		kfree(fcall);
439 		fid->fidopen = 0;
440 		fid->fidcreate = 0;
441 		d_drop(file_dentry);
442 	}
443 
444 	return 0;
445 
446       CleanUpFid:
447 	kfree(fcall);
448 
449 	if (newfid >= 0) {
450 		if (!v9fs_t_clunk(v9ses, newfid, &fcall))
451 			v9fs_put_idpool(newfid, &v9ses->fidpool);
452 		else
453 			dprintk(DEBUG_ERROR, "clunk failed: %s\n",
454 				FCALL_ERROR(fcall));
455 
456 		kfree(fcall);
457 	}
458 	if (wfidno >= 0) {
459 		if (!v9fs_t_clunk(v9ses, wfidno, &fcall))
460 			v9fs_put_idpool(wfidno, &v9ses->fidpool);
461 		else
462 			dprintk(DEBUG_ERROR, "clunk failed: %s\n",
463 				FCALL_ERROR(fcall));
464 
465 		kfree(fcall);
466 	}
467 	return result;
468 }
469 
470 /**
471  * v9fs_remove - helper function to remove files and directories
472  * @dir: directory inode that is being deleted
473  * @file:  dentry that is being deleted
474  * @rmdir: removing a directory
475  *
476  */
477 
478 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
479 {
480 	struct v9fs_fcall *fcall = NULL;
481 	struct super_block *sb = NULL;
482 	struct v9fs_session_info *v9ses = NULL;
483 	struct v9fs_fid *v9fid = NULL;
484 	struct inode *file_inode = NULL;
485 	int fid = -1;
486 	int result = 0;
487 
488 	dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
489 		rmdir);
490 
491 	file_inode = file->d_inode;
492 	sb = file_inode->i_sb;
493 	v9ses = v9fs_inode2v9ses(file_inode);
494 	v9fid = v9fs_fid_lookup(file);
495 
496 	if (!v9fid) {
497 		dprintk(DEBUG_ERROR,
498 			"no v9fs_fid\n");
499 		return -EBADF;
500 	}
501 
502 	fid = v9fid->fid;
503 	if (fid < 0) {
504 		dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
505 			file_inode->i_ino);
506 		return -EBADF;
507 	}
508 
509 	result = v9fs_t_remove(v9ses, fid, &fcall);
510 	if (result < 0)
511 		dprintk(DEBUG_ERROR, "remove of file fails: %s(%d)\n",
512 			FCALL_ERROR(fcall), result);
513 	else {
514 		v9fs_put_idpool(fid, &v9ses->fidpool);
515 		v9fs_fid_destroy(v9fid);
516 	}
517 
518 	kfree(fcall);
519 	return result;
520 }
521 
522 /**
523  * v9fs_vfs_create - VFS hook to create files
524  * @inode: directory inode that is being deleted
525  * @dentry:  dentry that is being deleted
526  * @perm: create permissions
527  * @nd: path information
528  *
529  */
530 
531 static int
532 v9fs_vfs_create(struct inode *inode, struct dentry *dentry, int perm,
533 		struct nameidata *nd)
534 {
535 	return v9fs_create(inode, dentry, perm, O_RDWR);
536 }
537 
538 /**
539  * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
540  * @inode:  inode that is being unlinked
541  * @dentry: dentry that is being unlinked
542  * @mode: mode for new directory
543  *
544  */
545 
546 static int v9fs_vfs_mkdir(struct inode *inode, struct dentry *dentry, int mode)
547 {
548 	return v9fs_create(inode, dentry, mode | S_IFDIR, O_RDONLY);
549 }
550 
551 /**
552  * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
553  * @dir:  inode that is being walked from
554  * @dentry: dentry that is being walked to?
555  * @nameidata: path data
556  *
557  */
558 
559 static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
560 				      struct nameidata *nameidata)
561 {
562 	struct super_block *sb;
563 	struct v9fs_session_info *v9ses;
564 	struct v9fs_fid *dirfid;
565 	struct v9fs_fid *fid;
566 	struct inode *inode;
567 	struct v9fs_fcall *fcall = NULL;
568 	struct stat newstat;
569 	int dirfidnum = -1;
570 	int newfid = -1;
571 	int result = 0;
572 
573 	dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
574 		dir, dentry->d_iname, dentry, nameidata);
575 
576 	sb = dir->i_sb;
577 	v9ses = v9fs_inode2v9ses(dir);
578 	dirfid = v9fs_fid_lookup(dentry->d_parent);
579 
580 	if (!dirfid) {
581 		dprintk(DEBUG_ERROR, "no dirfid\n");
582 		return ERR_PTR(-EINVAL);
583 	}
584 
585 	dirfidnum = dirfid->fid;
586 
587 	if (dirfidnum < 0) {
588 		dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n",
589 			dir, dir->i_ino);
590 		return ERR_PTR(-EBADF);
591 	}
592 
593 	newfid = v9fs_get_idpool(&v9ses->fidpool);
594 	if (newfid < 0) {
595 		eprintk(KERN_WARNING, "newfid fails!\n");
596 		return ERR_PTR(-ENOSPC);
597 	}
598 
599 	result =
600 	    v9fs_t_walk(v9ses, dirfidnum, newfid, (char *)dentry->d_name.name,
601 			NULL);
602 	if (result < 0) {
603 		v9fs_put_idpool(newfid, &v9ses->fidpool);
604 		if (result == -ENOENT) {
605 			d_add(dentry, NULL);
606 			dprintk(DEBUG_VFS,
607 				"Return negative dentry %p count %d\n",
608 				dentry, atomic_read(&dentry->d_count));
609 			return NULL;
610 		}
611 		dprintk(DEBUG_ERROR, "walk error:%d\n", result);
612 		goto FreeFcall;
613 	}
614 
615 	result = v9fs_t_stat(v9ses, newfid, &fcall);
616 	if (result < 0) {
617 		dprintk(DEBUG_ERROR, "stat error\n");
618 		goto FreeFcall;
619 	}
620 
621 	v9fs_mistat2unix(fcall->params.rstat.stat, &newstat, sb);
622 	inode = v9fs_get_inode(sb, newstat.st_mode);
623 
624 	if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
625 		eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
626 			PTR_ERR(inode));
627 
628 		result = -ENOSPC;
629 		goto FreeFcall;
630 	}
631 
632 	inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat->qid);
633 
634 	fid = v9fs_fid_create(dentry, v9ses, newfid, 0);
635 	if (fid == NULL) {
636 		dprintk(DEBUG_ERROR, "couldn't insert\n");
637 		result = -ENOMEM;
638 		goto FreeFcall;
639 	}
640 
641 	fid->qid = fcall->params.rstat.stat->qid;
642 
643 	dentry->d_op = &v9fs_dentry_operations;
644 	v9fs_mistat2inode(fcall->params.rstat.stat, inode, inode->i_sb);
645 
646 	d_add(dentry, inode);
647 	kfree(fcall);
648 
649 	return NULL;
650 
651       FreeFcall:
652 	kfree(fcall);
653 	return ERR_PTR(result);
654 }
655 
656 /**
657  * v9fs_vfs_unlink - VFS unlink hook to delete an inode
658  * @i:  inode that is being unlinked
659  * @d: dentry that is being unlinked
660  *
661  */
662 
663 static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
664 {
665 	return v9fs_remove(i, d, 0);
666 }
667 
668 /**
669  * v9fs_vfs_rmdir - VFS unlink hook to delete a directory
670  * @i:  inode that is being unlinked
671  * @d: dentry that is being unlinked
672  *
673  */
674 
675 static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d)
676 {
677 	return v9fs_remove(i, d, 1);
678 }
679 
680 /**
681  * v9fs_vfs_rename - VFS hook to rename an inode
682  * @old_dir:  old dir inode
683  * @old_dentry: old dentry
684  * @new_dir: new dir inode
685  * @new_dentry: new dentry
686  *
687  */
688 
689 static int
690 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
691 		struct inode *new_dir, struct dentry *new_dentry)
692 {
693 	struct inode *old_inode = old_dentry->d_inode;
694 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
695 	struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
696 	struct v9fs_fid *olddirfid =
697 	    v9fs_fid_lookup(old_dentry->d_parent);
698 	struct v9fs_fid *newdirfid =
699 	    v9fs_fid_lookup(new_dentry->d_parent);
700 	struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
701 	struct v9fs_fcall *fcall = NULL;
702 	int fid = -1;
703 	int olddirfidnum = -1;
704 	int newdirfidnum = -1;
705 	int retval = 0;
706 
707 	dprintk(DEBUG_VFS, "\n");
708 
709 	if (!mistat)
710 		return -ENOMEM;
711 
712 	if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
713 		dprintk(DEBUG_ERROR, "problem with arguments\n");
714 		return -EBADF;
715 	}
716 
717 	/* 9P can only handle file rename in the same directory */
718 	if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
719 		dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
720 		retval = -EPERM;
721 		goto FreeFcallnBail;
722 	}
723 
724 	fid = oldfid->fid;
725 	olddirfidnum = olddirfid->fid;
726 	newdirfidnum = newdirfid->fid;
727 
728 	if (fid < 0) {
729 		dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
730 			old_inode->i_ino);
731 		retval = -EBADF;
732 		goto FreeFcallnBail;
733 	}
734 
735 	v9fs_blank_mistat(v9ses, mistat);
736 
737 	strcpy(mistat->data + 1, v9ses->name);
738 	mistat->name = mistat->data + 1 + strlen(v9ses->name);
739 
740 	if (new_dentry->d_name.len >
741 	    (v9ses->maxdata - strlen(v9ses->name) - sizeof(struct v9fs_stat))) {
742 		dprintk(DEBUG_ERROR, "new name too long\n");
743 		goto FreeFcallnBail;
744 	}
745 
746 	strcpy(mistat->name, new_dentry->d_name.name);
747 	retval = v9fs_t_wstat(v9ses, fid, mistat, &fcall);
748 
749       FreeFcallnBail:
750 	kfree(mistat);
751 
752 	if (retval < 0)
753 		dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
754 			FCALL_ERROR(fcall));
755 
756 	kfree(fcall);
757 	return retval;
758 }
759 
760 /**
761  * v9fs_vfs_getattr - retreive file metadata
762  * @mnt - mount information
763  * @dentry - file to get attributes on
764  * @stat - metadata structure to populate
765  *
766  */
767 
768 static int
769 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
770 		 struct kstat *stat)
771 {
772 	struct v9fs_fcall *fcall = NULL;
773 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
774 	struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
775 	int err = -EPERM;
776 
777 	dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
778 	if (!fid) {
779 		dprintk(DEBUG_ERROR,
780 			"couldn't find fid associated with dentry\n");
781 		return -EBADF;
782 	}
783 
784 	err = v9fs_t_stat(v9ses, fid->fid, &fcall);
785 
786 	if (err < 0)
787 		dprintk(DEBUG_ERROR, "stat error\n");
788 	else {
789 		v9fs_mistat2inode(fcall->params.rstat.stat, dentry->d_inode,
790 				  dentry->d_inode->i_sb);
791 		generic_fillattr(dentry->d_inode, stat);
792 	}
793 
794 	kfree(fcall);
795 	return err;
796 }
797 
798 /**
799  * v9fs_vfs_setattr - set file metadata
800  * @dentry: file whose metadata to set
801  * @iattr: metadata assignment structure
802  *
803  */
804 
805 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
806 {
807 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
808 	struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
809 	struct v9fs_fcall *fcall = NULL;
810 	struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
811 	int res = -EPERM;
812 
813 	dprintk(DEBUG_VFS, "\n");
814 
815 	if (!mistat)
816 		return -ENOMEM;
817 
818 	if (!fid) {
819 		dprintk(DEBUG_ERROR,
820 			"Couldn't find fid associated with dentry\n");
821 		return -EBADF;
822 	}
823 
824 	v9fs_blank_mistat(v9ses, mistat);
825 	if (iattr->ia_valid & ATTR_MODE)
826 		mistat->mode = unixmode2p9mode(v9ses, iattr->ia_mode);
827 
828 	if (iattr->ia_valid & ATTR_MTIME)
829 		mistat->mtime = iattr->ia_mtime.tv_sec;
830 
831 	if (iattr->ia_valid & ATTR_ATIME)
832 		mistat->atime = iattr->ia_atime.tv_sec;
833 
834 	if (iattr->ia_valid & ATTR_SIZE)
835 		mistat->length = iattr->ia_size;
836 
837 	if (v9ses->extended) {
838 		char *ptr = mistat->data+1;
839 
840 		if (iattr->ia_valid & ATTR_UID) {
841 			mistat->uid = ptr;
842 			ptr += 1+sprintf(ptr, "%08x", iattr->ia_uid);
843 			mistat->n_uid = iattr->ia_uid;
844 		}
845 
846 		if (iattr->ia_valid & ATTR_GID) {
847 			mistat->gid = ptr;
848 			ptr += 1+sprintf(ptr, "%08x", iattr->ia_gid);
849 			mistat->n_gid = iattr->ia_gid;
850 		}
851 	}
852 
853 	res = v9fs_t_wstat(v9ses, fid->fid, mistat, &fcall);
854 
855 	if (res < 0)
856 		dprintk(DEBUG_ERROR, "wstat error: %s\n", FCALL_ERROR(fcall));
857 
858 	kfree(mistat);
859 	kfree(fcall);
860 
861 	if (res >= 0)
862 		res = inode_setattr(dentry->d_inode, iattr);
863 
864 	return res;
865 }
866 
867 /**
868  * v9fs_mistat2inode - populate an inode structure with mistat info
869  * @mistat: Plan 9 metadata (mistat) structure
870  * @inode: inode to populate
871  * @sb: superblock of filesystem
872  *
873  */
874 
875 void
876 v9fs_mistat2inode(struct v9fs_stat *mistat, struct inode *inode,
877 		  struct super_block *sb)
878 {
879 	struct v9fs_session_info *v9ses = sb->s_fs_info;
880 
881 	inode->i_nlink = 1;
882 
883 	inode->i_atime.tv_sec = mistat->atime;
884 	inode->i_mtime.tv_sec = mistat->mtime;
885 	inode->i_ctime.tv_sec = mistat->mtime;
886 
887 	inode->i_uid = -1;
888 	inode->i_gid = -1;
889 
890 	if (v9ses->extended) {
891 		/* TODO: string to uid mapping via user-space daemon */
892 		inode->i_uid = mistat->n_uid;
893 		inode->i_gid = mistat->n_gid;
894 
895 		if (mistat->n_uid == -1)
896 			sscanf(mistat->uid, "%x", &inode->i_uid);
897 
898 		if (mistat->n_gid == -1)
899 			sscanf(mistat->gid, "%x", &inode->i_gid);
900 	}
901 
902 	if (inode->i_uid == -1)
903 		inode->i_uid = v9ses->uid;
904 	if (inode->i_gid == -1)
905 		inode->i_gid = v9ses->gid;
906 
907 	inode->i_mode = p9mode2unixmode(v9ses, mistat->mode);
908 	if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
909 		char type = 0;
910 		int major = -1;
911 		int minor = -1;
912 		sscanf(mistat->extension, "%c %u %u", &type, &major, &minor);
913 		switch (type) {
914 		case 'c':
915 			inode->i_mode &= ~S_IFBLK;
916 			inode->i_mode |= S_IFCHR;
917 			break;
918 		case 'b':
919 			break;
920 		default:
921 			dprintk(DEBUG_ERROR, "Unknown special type %c (%s)\n",
922 				type, mistat->extension);
923 		};
924 		inode->i_rdev = MKDEV(major, minor);
925 	} else
926 		inode->i_rdev = 0;
927 
928 	inode->i_size = mistat->length;
929 
930 	inode->i_blksize = sb->s_blocksize;
931 	inode->i_blocks =
932 	    (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits;
933 }
934 
935 /**
936  * v9fs_qid2ino - convert qid into inode number
937  * @qid: qid to hash
938  *
939  * BUG: potential for inode number collisions?
940  */
941 
942 ino_t v9fs_qid2ino(struct v9fs_qid *qid)
943 {
944 	u64 path = qid->path + 2;
945 	ino_t i = 0;
946 
947 	if (sizeof(ino_t) == sizeof(path))
948 		memcpy(&i, &path, sizeof(ino_t));
949 	else
950 		i = (ino_t) (path ^ (path >> 32));
951 
952 	return i;
953 }
954 
955 /**
956  * v9fs_vfs_symlink - helper function to create symlinks
957  * @dir: directory inode containing symlink
958  * @dentry: dentry for symlink
959  * @symname: symlink data
960  *
961  * See 9P2000.u RFC for more information
962  *
963  */
964 
965 static int
966 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
967 {
968 	int retval = -EPERM;
969 	struct v9fs_fid *newfid;
970 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
971 	struct v9fs_fcall *fcall = NULL;
972 	struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
973 
974 	dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
975 		symname);
976 
977 	if (!mistat)
978 		return -ENOMEM;
979 
980 	if (!v9ses->extended) {
981 		dprintk(DEBUG_ERROR, "not extended\n");
982 		goto FreeFcall;
983 	}
984 
985 	/* issue a create */
986 	retval = v9fs_create(dir, dentry, S_IFLNK, 0);
987 	if (retval != 0)
988 		goto FreeFcall;
989 
990 	newfid = v9fs_fid_lookup(dentry);
991 
992 	/* issue a twstat */
993 	v9fs_blank_mistat(v9ses, mistat);
994 	strcpy(mistat->data + 1, symname);
995 	mistat->extension = mistat->data + 1;
996 	retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
997 	if (retval < 0) {
998 		dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
999 			FCALL_ERROR(fcall));
1000 		goto FreeFcall;
1001 	}
1002 
1003 	kfree(fcall);
1004 
1005 	if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1006 		dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1007 			FCALL_ERROR(fcall));
1008 		goto FreeFcall;
1009 	}
1010 
1011 	d_drop(dentry);		/* FID - will this also clunk? */
1012 
1013       FreeFcall:
1014 	kfree(mistat);
1015 	kfree(fcall);
1016 
1017 	return retval;
1018 }
1019 
1020 /**
1021  * v9fs_readlink - read a symlink's location (internal version)
1022  * @dentry: dentry for symlink
1023  * @buffer: buffer to load symlink location into
1024  * @buflen: length of buffer
1025  *
1026  */
1027 
1028 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
1029 {
1030 	int retval = -EPERM;
1031 
1032 	struct v9fs_fcall *fcall = NULL;
1033 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
1034 	struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
1035 
1036 	if (!fid) {
1037 		dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
1038 		retval = -EBADF;
1039 		goto FreeFcall;
1040 	}
1041 
1042 	if (!v9ses->extended) {
1043 		retval = -EBADF;
1044 		dprintk(DEBUG_ERROR, "not extended\n");
1045 		goto FreeFcall;
1046 	}
1047 
1048 	dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
1049 	retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
1050 
1051 	if (retval < 0) {
1052 		dprintk(DEBUG_ERROR, "stat error\n");
1053 		goto FreeFcall;
1054 	}
1055 
1056 	if (!fcall)
1057 		return -EIO;
1058 
1059 	if (!(fcall->params.rstat.stat->mode & V9FS_DMSYMLINK)) {
1060 		retval = -EINVAL;
1061 		goto FreeFcall;
1062 	}
1063 
1064 	/* copy extension buffer into buffer */
1065 	if (strlen(fcall->params.rstat.stat->extension) < buflen)
1066 		buflen = strlen(fcall->params.rstat.stat->extension);
1067 
1068 	memcpy(buffer, fcall->params.rstat.stat->extension, buflen + 1);
1069 
1070 	retval = buflen;
1071 
1072       FreeFcall:
1073 	kfree(fcall);
1074 
1075 	return retval;
1076 }
1077 
1078 /**
1079  * v9fs_vfs_readlink - read a symlink's location
1080  * @dentry: dentry for symlink
1081  * @buf: buffer to load symlink location into
1082  * @buflen: length of buffer
1083  *
1084  */
1085 
1086 static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
1087 			     int buflen)
1088 {
1089 	int retval;
1090 	int ret;
1091 	char *link = __getname();
1092 
1093 	if (buflen > PATH_MAX)
1094 		buflen = PATH_MAX;
1095 
1096 	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
1097 
1098 	retval = v9fs_readlink(dentry, link, buflen);
1099 
1100 	if (retval > 0) {
1101 		if ((ret = copy_to_user(buffer, link, retval)) != 0) {
1102 			dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
1103 				ret);
1104 			retval = ret;
1105 		}
1106 	}
1107 
1108 	putname(link);
1109 	return retval;
1110 }
1111 
1112 /**
1113  * v9fs_vfs_follow_link - follow a symlink path
1114  * @dentry: dentry for symlink
1115  * @nd: nameidata
1116  *
1117  */
1118 
1119 static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
1120 {
1121 	int len = 0;
1122 	char *link = __getname();
1123 
1124 	dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
1125 
1126 	if (!link)
1127 		link = ERR_PTR(-ENOMEM);
1128 	else {
1129 		len = v9fs_readlink(dentry, link, strlen(link));
1130 
1131 		if (len < 0) {
1132 			putname(link);
1133 			link = ERR_PTR(len);
1134 		} else
1135 			link[len] = 0;
1136 	}
1137 	nd_set_link(nd, link);
1138 
1139 	return NULL;
1140 }
1141 
1142 /**
1143  * v9fs_vfs_put_link - release a symlink path
1144  * @dentry: dentry for symlink
1145  * @nd: nameidata
1146  *
1147  */
1148 
1149 static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
1150 {
1151 	char *s = nd_get_link(nd);
1152 
1153 	dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
1154 	if (!IS_ERR(s))
1155 		putname(s);
1156 }
1157 
1158 /**
1159  * v9fs_vfs_link - create a hardlink
1160  * @old_dentry: dentry for file to link to
1161  * @dir: inode destination for new link
1162  * @dentry: dentry for link
1163  *
1164  */
1165 
1166 /* XXX - lots of code dup'd from symlink and creates,
1167  * figure out a better reuse strategy
1168  */
1169 
1170 static int
1171 v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
1172 	      struct dentry *dentry)
1173 {
1174 	int retval = -EPERM;
1175 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
1176 	struct v9fs_fcall *fcall = NULL;
1177 	struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
1178 	struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
1179 	struct v9fs_fid *newfid = NULL;
1180 	char *symname = __getname();
1181 
1182 	dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
1183 		old_dentry->d_name.name);
1184 
1185 	if (!v9ses->extended) {
1186 		dprintk(DEBUG_ERROR, "not extended\n");
1187 		goto FreeMem;
1188 	}
1189 
1190 	/* get fid of old_dentry */
1191 	sprintf(symname, "hardlink(%d)\n", oldfid->fid);
1192 
1193 	/* issue a create */
1194 	retval = v9fs_create(dir, dentry, V9FS_DMLINK, 0);
1195 	if (retval != 0)
1196 		goto FreeMem;
1197 
1198 	newfid = v9fs_fid_lookup(dentry);
1199 	if (!newfid) {
1200 		dprintk(DEBUG_ERROR, "couldn't resolve fid from dentry\n");
1201 		goto FreeMem;
1202 	}
1203 
1204 	/* issue a twstat */
1205 	v9fs_blank_mistat(v9ses, mistat);
1206 	strcpy(mistat->data + 1, symname);
1207 	mistat->extension = mistat->data + 1;
1208 	retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
1209 	if (retval < 0) {
1210 		dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
1211 			FCALL_ERROR(fcall));
1212 		goto FreeMem;
1213 	}
1214 
1215 	kfree(fcall);
1216 
1217 	if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1218 		dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1219 			FCALL_ERROR(fcall));
1220 		goto FreeMem;
1221 	}
1222 
1223 	d_drop(dentry);		/* FID - will this also clunk? */
1224 
1225 	kfree(fcall);
1226 	fcall = NULL;
1227 
1228       FreeMem:
1229 	kfree(mistat);
1230 	kfree(fcall);
1231 	putname(symname);
1232 	return retval;
1233 }
1234 
1235 /**
1236  * v9fs_vfs_mknod - create a special file
1237  * @dir: inode destination for new link
1238  * @dentry: dentry for file
1239  * @mode: mode for creation
1240  * @dev_t: device associated with special file
1241  *
1242  */
1243 
1244 static int
1245 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
1246 {
1247 	int retval = -EPERM;
1248 	struct v9fs_fid *newfid;
1249 	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
1250 	struct v9fs_fcall *fcall = NULL;
1251 	struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
1252 	char *symname = __getname();
1253 
1254 	dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
1255 		dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
1256 
1257 	if (!mistat)
1258 		return -ENOMEM;
1259 
1260 	if (!new_valid_dev(rdev)) {
1261 		retval = -EINVAL;
1262 		goto FreeMem;
1263 	}
1264 
1265 	if (!v9ses->extended) {
1266 		dprintk(DEBUG_ERROR, "not extended\n");
1267 		goto FreeMem;
1268 	}
1269 
1270 	/* issue a create */
1271 	retval = v9fs_create(dir, dentry, mode, 0);
1272 
1273 	if (retval != 0)
1274 		goto FreeMem;
1275 
1276 	newfid = v9fs_fid_lookup(dentry);
1277 	if (!newfid) {
1278 		dprintk(DEBUG_ERROR, "coudn't resove fid from dentry\n");
1279 		retval = -EINVAL;
1280 		goto FreeMem;
1281 	}
1282 
1283 	/* build extension */
1284 	if (S_ISBLK(mode))
1285 		sprintf(symname, "b %u %u", MAJOR(rdev), MINOR(rdev));
1286 	else if (S_ISCHR(mode))
1287 		sprintf(symname, "c %u %u", MAJOR(rdev), MINOR(rdev));
1288 	else if (S_ISFIFO(mode))
1289 		;	/* DO NOTHING */
1290 	else {
1291 		retval = -EINVAL;
1292 		goto FreeMem;
1293 	}
1294 
1295 	if (!S_ISFIFO(mode)) {
1296 		/* issue a twstat */
1297 		v9fs_blank_mistat(v9ses, mistat);
1298 		strcpy(mistat->data + 1, symname);
1299 		mistat->extension = mistat->data + 1;
1300 		retval = v9fs_t_wstat(v9ses, newfid->fid, mistat, &fcall);
1301 		if (retval < 0) {
1302 			dprintk(DEBUG_ERROR, "v9fs_t_wstat error: %s\n",
1303 				FCALL_ERROR(fcall));
1304 			goto FreeMem;
1305 		}
1306 	}
1307 
1308 	/* need to update dcache so we show up */
1309 	kfree(fcall);
1310 
1311 	if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
1312 		dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
1313 			FCALL_ERROR(fcall));
1314 		goto FreeMem;
1315 	}
1316 
1317 	d_drop(dentry);		/* FID - will this also clunk? */
1318 
1319       FreeMem:
1320 	kfree(mistat);
1321 	kfree(fcall);
1322 	putname(symname);
1323 
1324 	return retval;
1325 }
1326 
1327 static struct inode_operations v9fs_dir_inode_operations_ext = {
1328 	.create = v9fs_vfs_create,
1329 	.lookup = v9fs_vfs_lookup,
1330 	.symlink = v9fs_vfs_symlink,
1331 	.link = v9fs_vfs_link,
1332 	.unlink = v9fs_vfs_unlink,
1333 	.mkdir = v9fs_vfs_mkdir,
1334 	.rmdir = v9fs_vfs_rmdir,
1335 	.mknod = v9fs_vfs_mknod,
1336 	.rename = v9fs_vfs_rename,
1337 	.readlink = v9fs_vfs_readlink,
1338 	.getattr = v9fs_vfs_getattr,
1339 	.setattr = v9fs_vfs_setattr,
1340 };
1341 
1342 static struct inode_operations v9fs_dir_inode_operations = {
1343 	.create = v9fs_vfs_create,
1344 	.lookup = v9fs_vfs_lookup,
1345 	.unlink = v9fs_vfs_unlink,
1346 	.mkdir = v9fs_vfs_mkdir,
1347 	.rmdir = v9fs_vfs_rmdir,
1348 	.mknod = v9fs_vfs_mknod,
1349 	.rename = v9fs_vfs_rename,
1350 	.getattr = v9fs_vfs_getattr,
1351 	.setattr = v9fs_vfs_setattr,
1352 };
1353 
1354 static struct inode_operations v9fs_file_inode_operations = {
1355 	.getattr = v9fs_vfs_getattr,
1356 	.setattr = v9fs_vfs_setattr,
1357 };
1358 
1359 static struct inode_operations v9fs_symlink_inode_operations = {
1360 	.readlink = v9fs_vfs_readlink,
1361 	.follow_link = v9fs_vfs_follow_link,
1362 	.put_link = v9fs_vfs_put_link,
1363 	.getattr = v9fs_vfs_getattr,
1364 	.setattr = v9fs_vfs_setattr,
1365 };
1366