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fs/9p: set fs cache cookie in create path also
[deliverable/linux.git] / fs / 9p / vfs_inode_dotl.c
CommitLineData
53c06f4e
AK		 1/*
2 * linux/fs/9p/vfs_inode_dotl.c
3 *
4 * This file contains vfs inode ops for the 9P2000.L 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 version 2
11 * as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
23 *
24 */
25
26#include <linux/module.h>
27#include <linux/errno.h>
28#include <linux/fs.h>
29#include <linux/file.h>
30#include <linux/pagemap.h>
31#include <linux/stat.h>
32#include <linux/string.h>
33#include <linux/inet.h>
34#include <linux/namei.h>
35#include <linux/idr.h>
36#include <linux/sched.h>
37#include <linux/slab.h>
38#include <linux/xattr.h>
39#include <linux/posix_acl.h>
40#include <net/9p/9p.h>
41#include <net/9p/client.h>
42
43#include "v9fs.h"
44#include "v9fs_vfs.h"
45#include "fid.h"
46#include "cache.h"
47#include "xattr.h"
48#include "acl.h"
49
50static int
51v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
52 dev_t rdev);
53
54/**
55 * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a
56 * new file system object. This checks the S_ISGID to determine the owning
57 * group of the new file system object.
58 */
59
60static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
61{
62 BUG_ON(dir_inode == NULL);
63
64 if (dir_inode->i_mode & S_ISGID) {
65 /* set_gid bit is set.*/
66 return dir_inode->i_gid;
67 }
68 return current_fsgid();
69}
70
71/**
72 * v9fs_dentry_from_dir_inode - helper function to get the dentry from
73 * dir inode.
74 *
75 */
76
77static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
78{
79 struct dentry *dentry;
80
81 spin_lock(&inode->i_lock);
82 /* Directory should have only one entry. */
83 BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
84 dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias);
85 spin_unlock(&inode->i_lock);
86 return dentry;
87}
88
89struct inode *
90v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
91 struct super_block *sb)
92{
93 struct inode *ret = NULL;
94 int err;
95 struct p9_stat_dotl *st;
96
97 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
98 if (IS_ERR(st))
99 return ERR_CAST(st);
100
101 ret = v9fs_get_inode(sb, st->st_mode);
102 if (IS_ERR(ret)) {
103 err = PTR_ERR(ret);
104 goto error;
105 }
106
107 v9fs_stat2inode_dotl(st, ret);
108 ret->i_ino = v9fs_qid2ino(&st->qid);
109#ifdef CONFIG_9P_FSCACHE
110 v9fs_vcookie_set_qid(ret, &st->qid);
111 v9fs_cache_inode_get_cookie(ret);
112#endif
113 err = v9fs_get_acl(ret, fid);
114 if (err) {
115 iput(ret);
116 goto error;
117 }
118 kfree(st);
119 return ret;
120error:
121 kfree(st);
122 return ERR_PTR(err);
123}
124
125/**
126 * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
127 * @dir: directory inode that is being created
128 * @dentry: dentry that is being deleted
129 * @mode: create permissions
130 * @nd: path information
131 *
132 */
133
134static int
135v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
136 struct nameidata *nd)
137{
138 int err = 0;
139 char *name = NULL;
140 gid_t gid;
141 int flags;
142 mode_t mode;
143 struct v9fs_session_info *v9ses;
144 struct p9_fid *fid = NULL;
145 struct p9_fid *dfid, *ofid;
146 struct file *filp;
147 struct p9_qid qid;
148 struct inode *inode;
149 struct posix_acl *pacl = NULL, *dacl = NULL;
150
151 v9ses = v9fs_inode2v9ses(dir);
152 if (nd && nd->flags & LOOKUP_OPEN)
153 flags = nd->intent.open.flags - 1;
154 else {
155 /*
156 * create call without LOOKUP_OPEN is due
157 * to mknod of regular files. So use mknod
158 * operation.
159 */
160 return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
161 }
162
163 name = (char *) dentry->d_name.name;
164 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x "
165 "mode:0x%x\n", name, flags, omode);
166
167 dfid = v9fs_fid_lookup(dentry->d_parent);
168 if (IS_ERR(dfid)) {
169 err = PTR_ERR(dfid);
170 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
171 return err;
172 }
173
174 /* clone a fid to use for creation */
175 ofid = p9_client_walk(dfid, 0, NULL, 1);
176 if (IS_ERR(ofid)) {
177 err = PTR_ERR(ofid);
178 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
179 return err;
180 }
181
182 gid = v9fs_get_fsgid_for_create(dir);
183
184 mode = omode;
185 /* Update mode based on ACL value */
186 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
187 if (err) {
188 P9_DPRINTK(P9_DEBUG_VFS,
189 "Failed to get acl values in creat %d\n", err);
190 goto error;
191 }
192 err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid);
193 if (err < 0) {
194 P9_DPRINTK(P9_DEBUG_VFS,
195 "p9_client_open_dotl failed in creat %d\n",
196 err);
197 goto error;
198 }
53c06f4e 199
af7542fc
AK		 200 /* instantiate inode and assign the unopened fid to the dentry */
201 fid = p9_client_walk(dfid, 1, &name, 1);
202 if (IS_ERR(fid)) {
203 err = PTR_ERR(fid);
c25a61f5 204 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
53c06f4e 205 fid = NULL;
af7542fc 206 goto error;
53c06f4e 207 }
af7542fc
AK		 208 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
209 if (IS_ERR(inode)) {
210 err = PTR_ERR(inode);
211 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);
212 goto error;
213 }
af7542fc
AK		 214 d_instantiate(dentry, inode);
215 err = v9fs_fid_add(dentry, fid);
216 if (err < 0)
217 goto error;
218
53c06f4e
AK		 219 /* Now set the ACL based on the default value */
220 v9fs_set_create_acl(dentry, dacl, pacl);
221
af7542fc
AK		 222 /* Since we are opening a file, assign the open fid to the file */
223 filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
224 if (IS_ERR(filp)) {
53c06f4e 225 p9_client_clunk(ofid);
af7542fc
AK		 226 return PTR_ERR(filp);
227 }
228 filp->private_data = ofid;
46848de0
AK		 229#ifdef CONFIG_9P_FSCACHE
230 if (v9ses->cache)
231 v9fs_cache_inode_set_cookie(inode, filp);
232#endif
53c06f4e
AK		 233 return 0;
234
235error:
236 if (ofid)
237 p9_client_clunk(ofid);
238 if (fid)
239 p9_client_clunk(fid);
240 return err;
241}
242
243/**
244 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
245 * @dir: inode that is being unlinked
246 * @dentry: dentry that is being unlinked
247 * @mode: mode for new directory
248 *
249 */
250
251static int v9fs_vfs_mkdir_dotl(struct inode *dir,
252 struct dentry *dentry, int omode)
253{
254 int err;
255 struct v9fs_session_info *v9ses;
256 struct p9_fid *fid = NULL, *dfid = NULL;
257 gid_t gid;
258 char *name;
259 mode_t mode;
260 struct inode *inode;
261 struct p9_qid qid;
262 struct dentry *dir_dentry;
263 struct posix_acl *dacl = NULL, *pacl = NULL;
264
265 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
266 err = 0;
267 v9ses = v9fs_inode2v9ses(dir);
268
269 omode |= S_IFDIR;
270 if (dir->i_mode & S_ISGID)
271 omode |= S_ISGID;
272
273 dir_dentry = v9fs_dentry_from_dir_inode(dir);
274 dfid = v9fs_fid_lookup(dir_dentry);
275 if (IS_ERR(dfid)) {
276 err = PTR_ERR(dfid);
277 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
278 dfid = NULL;
279 goto error;
280 }
281
282 gid = v9fs_get_fsgid_for_create(dir);
283 mode = omode;
284 /* Update mode based on ACL value */
285 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
286 if (err) {
287 P9_DPRINTK(P9_DEBUG_VFS,
288 "Failed to get acl values in mkdir %d\n", err);
289 goto error;
290 }
291 name = (char *) dentry->d_name.name;
292 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
293 if (err < 0)
294 goto error;
295
296 /* instantiate inode and assign the unopened fid to the dentry */
297 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
298 fid = p9_client_walk(dfid, 1, &name, 1);
299 if (IS_ERR(fid)) {
300 err = PTR_ERR(fid);
301 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
302 err);
303 fid = NULL;
304 goto error;
305 }
306
307 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
308 if (IS_ERR(inode)) {
309 err = PTR_ERR(inode);
310 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
311 err);
312 goto error;
313 }
53c06f4e
AK		 314 d_instantiate(dentry, inode);
315 err = v9fs_fid_add(dentry, fid);
316 if (err < 0)
317 goto error;
318 fid = NULL;
319 } else {
320 /*
321 * Not in cached mode. No need to populate
322 * inode with stat. We need to get an inode
323 * so that we can set the acl with dentry
324 */
325 inode = v9fs_get_inode(dir->i_sb, mode);
326 if (IS_ERR(inode)) {
327 err = PTR_ERR(inode);
328 goto error;
329 }
53c06f4e
AK		 330 d_instantiate(dentry, inode);
331 }
332 /* Now set the ACL based on the default value */
333 v9fs_set_create_acl(dentry, dacl, pacl);
334
335error:
336 if (fid)
337 p9_client_clunk(fid);
338 return err;
339}
340
341static int
342v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
343 struct kstat *stat)
344{
345 int err;
346 struct v9fs_session_info *v9ses;
347 struct p9_fid *fid;
348 struct p9_stat_dotl *st;
349
350 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
351 err = -EPERM;
352 v9ses = v9fs_inode2v9ses(dentry->d_inode);
353 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
354 return simple_getattr(mnt, dentry, stat);
355
356 fid = v9fs_fid_lookup(dentry);
357 if (IS_ERR(fid))
358 return PTR_ERR(fid);
359
360 /* Ask for all the fields in stat structure. Server will return
361 * whatever it supports
362 */
363
364 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
365 if (IS_ERR(st))
366 return PTR_ERR(st);
367
368 v9fs_stat2inode_dotl(st, dentry->d_inode);
369 generic_fillattr(dentry->d_inode, stat);
370 /* Change block size to what the server returned */
371 stat->blksize = st->st_blksize;
372
373 kfree(st);
374 return 0;
375}
376
377/**
378 * v9fs_vfs_setattr_dotl - set file metadata
379 * @dentry: file whose metadata to set
380 * @iattr: metadata assignment structure
381 *
382 */
383
384int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
385{
386 int retval;
387 struct v9fs_session_info *v9ses;
388 struct p9_fid *fid;
389 struct p9_iattr_dotl p9attr;
390
391 P9_DPRINTK(P9_DEBUG_VFS, "\n");
392
393 retval = inode_change_ok(dentry->d_inode, iattr);
394 if (retval)
395 return retval;
396
397 p9attr.valid = iattr->ia_valid;
398 p9attr.mode = iattr->ia_mode;
399 p9attr.uid = iattr->ia_uid;
400 p9attr.gid = iattr->ia_gid;
401 p9attr.size = iattr->ia_size;
402 p9attr.atime_sec = iattr->ia_atime.tv_sec;
403 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
404 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
405 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
406
407 retval = -EPERM;
408 v9ses = v9fs_inode2v9ses(dentry->d_inode);
409 fid = v9fs_fid_lookup(dentry);
410 if (IS_ERR(fid))
411 return PTR_ERR(fid);
412
413 retval = p9_client_setattr(fid, &p9attr);
414 if (retval < 0)
415 return retval;
416
417 if ((iattr->ia_valid & ATTR_SIZE) &&
418 iattr->ia_size != i_size_read(dentry->d_inode)) {
419 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
420 if (retval)
421 return retval;
422 }
423
424 setattr_copy(dentry->d_inode, iattr);
425 mark_inode_dirty(dentry->d_inode);
426 if (iattr->ia_valid & ATTR_MODE) {
427 /* We also want to update ACL when we update mode bits */
428 retval = v9fs_acl_chmod(dentry);
429 if (retval < 0)
430 return retval;
431 }
432 return 0;
433}
434
435/**
436 * v9fs_stat2inode_dotl - populate an inode structure with stat info
437 * @stat: stat structure
438 * @inode: inode to populate
439 * @sb: superblock of filesystem
440 *
441 */
442
443void
444v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
445{
446
447 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
448 inode->i_atime.tv_sec = stat->st_atime_sec;
449 inode->i_atime.tv_nsec = stat->st_atime_nsec;
450 inode->i_mtime.tv_sec = stat->st_mtime_sec;
451 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
452 inode->i_ctime.tv_sec = stat->st_ctime_sec;
453 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
454 inode->i_uid = stat->st_uid;
455 inode->i_gid = stat->st_gid;
456 inode->i_nlink = stat->st_nlink;
457 inode->i_mode = stat->st_mode;
458 inode->i_rdev = new_decode_dev(stat->st_rdev);
459
460 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
461 init_special_inode(inode, inode->i_mode, inode->i_rdev);
462
463 i_size_write(inode, stat->st_size);
464 inode->i_blocks = stat->st_blocks;
465 } else {
466 if (stat->st_result_mask & P9_STATS_ATIME) {
467 inode->i_atime.tv_sec = stat->st_atime_sec;
468 inode->i_atime.tv_nsec = stat->st_atime_nsec;
469 }
470 if (stat->st_result_mask & P9_STATS_MTIME) {
471 inode->i_mtime.tv_sec = stat->st_mtime_sec;
472 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
473 }
474 if (stat->st_result_mask & P9_STATS_CTIME) {
475 inode->i_ctime.tv_sec = stat->st_ctime_sec;
476 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
477 }
478 if (stat->st_result_mask & P9_STATS_UID)
479 inode->i_uid = stat->st_uid;
480 if (stat->st_result_mask & P9_STATS_GID)
481 inode->i_gid = stat->st_gid;
482 if (stat->st_result_mask & P9_STATS_NLINK)
483 inode->i_nlink = stat->st_nlink;
484 if (stat->st_result_mask & P9_STATS_MODE) {
485 inode->i_mode = stat->st_mode;
486 if ((S_ISBLK(inode->i_mode)) ||
487 (S_ISCHR(inode->i_mode)))
488 init_special_inode(inode, inode->i_mode,
489 inode->i_rdev);
490 }
491 if (stat->st_result_mask & P9_STATS_RDEV)
492 inode->i_rdev = new_decode_dev(stat->st_rdev);
493 if (stat->st_result_mask & P9_STATS_SIZE)
494 i_size_write(inode, stat->st_size);
495 if (stat->st_result_mask & P9_STATS_BLOCKS)
496 inode->i_blocks = stat->st_blocks;
497 }
498 if (stat->st_result_mask & P9_STATS_GEN)
499 inode->i_generation = stat->st_gen;
500
501 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
502 * because the inode structure does not have fields for them.
503 */
504}
505
506static int
507v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
508 const char *symname)
509{
510 struct v9fs_session_info *v9ses;
511 struct p9_fid *dfid;
512 struct p9_fid *fid = NULL;
513 struct inode *inode;
514 struct p9_qid qid;
515 char *name;
516 int err;
517 gid_t gid;
518
519 name = (char *) dentry->d_name.name;
520 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
521 dir->i_ino, name, symname);
522 v9ses = v9fs_inode2v9ses(dir);
523
524 dfid = v9fs_fid_lookup(dentry->d_parent);
525 if (IS_ERR(dfid)) {
526 err = PTR_ERR(dfid);
527 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
528 return err;
529 }
530
531 gid = v9fs_get_fsgid_for_create(dir);
532
533 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
534 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
535
536 if (err < 0) {
537 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
538 goto error;
539 }
540
541 if (v9ses->cache) {
542 /* Now walk from the parent so we can get an unopened fid. */
543 fid = p9_client_walk(dfid, 1, &name, 1);
544 if (IS_ERR(fid)) {
545 err = PTR_ERR(fid);
546 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
547 err);
548 fid = NULL;
549 goto error;
550 }
551
552 /* instantiate inode and assign the unopened fid to dentry */
553 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
554 if (IS_ERR(inode)) {
555 err = PTR_ERR(inode);
556 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
557 err);
558 goto error;
559 }
53c06f4e
AK		 560 d_instantiate(dentry, inode);
561 err = v9fs_fid_add(dentry, fid);
562 if (err < 0)
563 goto error;
564 fid = NULL;
565 } else {
566 /* Not in cached mode. No need to populate inode with stat */
567 inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
568 if (IS_ERR(inode)) {
569 err = PTR_ERR(inode);
570 goto error;
571 }
53c06f4e
AK		 572 d_instantiate(dentry, inode);
573 }
574
575error:
576 if (fid)
577 p9_client_clunk(fid);
578
579 return err;
580}
581
582/**
583 * v9fs_vfs_link_dotl - create a hardlink for dotl
584 * @old_dentry: dentry for file to link to
585 * @dir: inode destination for new link
586 * @dentry: dentry for link
587 *
588 */
589
590static int
591v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
592 struct dentry *dentry)
593{
594 int err;
595 struct p9_fid *dfid, *oldfid;
596 char *name;
597 struct v9fs_session_info *v9ses;
598 struct dentry *dir_dentry;
599
600 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
601 dir->i_ino, old_dentry->d_name.name,
602 dentry->d_name.name);
603
604 v9ses = v9fs_inode2v9ses(dir);
605 dir_dentry = v9fs_dentry_from_dir_inode(dir);
606 dfid = v9fs_fid_lookup(dir_dentry);
607 if (IS_ERR(dfid))
608 return PTR_ERR(dfid);
609
610 oldfid = v9fs_fid_lookup(old_dentry);
611 if (IS_ERR(oldfid))
612 return PTR_ERR(oldfid);
613
614 name = (char *) dentry->d_name.name;
615
616 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
617
618 if (err < 0) {
619 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
620 return err;
621 }
622
623 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
624 /* Get the latest stat info from server. */
625 struct p9_fid *fid;
626 struct p9_stat_dotl *st;
627
628 fid = v9fs_fid_lookup(old_dentry);
629 if (IS_ERR(fid))
630 return PTR_ERR(fid);
631
632 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
633 if (IS_ERR(st))
634 return PTR_ERR(st);
635
636 v9fs_stat2inode_dotl(st, old_dentry->d_inode);
637
638 kfree(st);
639 } else {
640 /* Caching disabled. No need to get upto date stat info.
641 * This dentry will be released immediately. So, just hold the
642 * inode
643 */
644 ihold(old_dentry->d_inode);
645 }
53c06f4e
AK		 646 d_instantiate(dentry, old_dentry->d_inode);
647
648 return err;
649}
650
651/**
652 * v9fs_vfs_mknod_dotl - create a special file
653 * @dir: inode destination for new link
654 * @dentry: dentry for file
655 * @mode: mode for creation
656 * @rdev: device associated with special file
657 *
658 */
659static int
660v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
661 dev_t rdev)
662{
663 int err;
664 char *name;
665 mode_t mode;
666 struct v9fs_session_info *v9ses;
667 struct p9_fid *fid = NULL, *dfid = NULL;
668 struct inode *inode;
669 gid_t gid;
670 struct p9_qid qid;
671 struct dentry *dir_dentry;
672 struct posix_acl *dacl = NULL, *pacl = NULL;
673
674 P9_DPRINTK(P9_DEBUG_VFS,
675 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
676 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
677
678 if (!new_valid_dev(rdev))
679 return -EINVAL;
680
681 v9ses = v9fs_inode2v9ses(dir);
682 dir_dentry = v9fs_dentry_from_dir_inode(dir);
683 dfid = v9fs_fid_lookup(dir_dentry);
684 if (IS_ERR(dfid)) {
685 err = PTR_ERR(dfid);
686 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
687 dfid = NULL;
688 goto error;
689 }
690
691 gid = v9fs_get_fsgid_for_create(dir);
692 mode = omode;
693 /* Update mode based on ACL value */
694 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
695 if (err) {
696 P9_DPRINTK(P9_DEBUG_VFS,
697 "Failed to get acl values in mknod %d\n", err);
698 goto error;
699 }
700 name = (char *) dentry->d_name.name;
701
702 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
703 if (err < 0)
704 goto error;
705
706 /* instantiate inode and assign the unopened fid to the dentry */
707 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
708 fid = p9_client_walk(dfid, 1, &name, 1);
709 if (IS_ERR(fid)) {
710 err = PTR_ERR(fid);
711 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
712 err);
713 fid = NULL;
714 goto error;
715 }
716
717 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
718 if (IS_ERR(inode)) {
719 err = PTR_ERR(inode);
720 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
721 err);
722 goto error;
723 }
53c06f4e
AK		 724 d_instantiate(dentry, inode);
725 err = v9fs_fid_add(dentry, fid);
726 if (err < 0)
727 goto error;
728 fid = NULL;
729 } else {
730 /*
731 * Not in cached mode. No need to populate inode with stat.
732 * socket syscall returns a fd, so we need instantiate
733 */
734 inode = v9fs_get_inode(dir->i_sb, mode);
735 if (IS_ERR(inode)) {
736 err = PTR_ERR(inode);
737 goto error;
738 }
53c06f4e
AK		 739 d_instantiate(dentry, inode);
740 }
741 /* Now set the ACL based on the default value */
742 v9fs_set_create_acl(dentry, dacl, pacl);
743error:
744 if (fid)
745 p9_client_clunk(fid);
746 return err;
747}
748
53c06f4e
AK		 749/**
750 * v9fs_vfs_follow_link_dotl - follow a symlink path
751 * @dentry: dentry for symlink
752 * @nd: nameidata
753 *
754 */
755
756static void *
757v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
758{
31b6ceac
MK		 759 int retval;
760 struct p9_fid *fid;
53c06f4e 761 char *link = __getname();
31b6ceac 762 char *target;
53c06f4e 763
31b6ceac 764 P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
53c06f4e 765
31b6ceac 766 if (!link) {
53c06f4e 767 link = ERR_PTR(-ENOMEM);
31b6ceac 768 goto ndset;
53c06f4e 769 }
31b6ceac
MK		 770 fid = v9fs_fid_lookup(dentry);
771 if (IS_ERR(fid)) {
772 __putname(link);
773 link = ERR_PTR(PTR_ERR(fid));
774 goto ndset;
775 }
776 retval = p9_client_readlink(fid, &target);
777 if (!retval) {
778 strcpy(link, target);
779 kfree(target);
780 goto ndset;
781 }
782 __putname(link);
783 link = ERR_PTR(retval);
784ndset:
53c06f4e 785 nd_set_link(nd, link);
53c06f4e
AK		 786 return NULL;
787}
788
789const struct inode_operations v9fs_dir_inode_operations_dotl = {
790 .create = v9fs_vfs_create_dotl,
791 .lookup = v9fs_vfs_lookup,
792 .link = v9fs_vfs_link_dotl,
793 .symlink = v9fs_vfs_symlink_dotl,
794 .unlink = v9fs_vfs_unlink,
795 .mkdir = v9fs_vfs_mkdir_dotl,
796 .rmdir = v9fs_vfs_rmdir,
797 .mknod = v9fs_vfs_mknod_dotl,
798 .rename = v9fs_vfs_rename,
799 .getattr = v9fs_vfs_getattr_dotl,
800 .setattr = v9fs_vfs_setattr_dotl,
801 .setxattr = generic_setxattr,
802 .getxattr = generic_getxattr,
803 .removexattr = generic_removexattr,
804 .listxattr = v9fs_listxattr,
805 .check_acl = v9fs_check_acl,
806};
807
808const struct inode_operations v9fs_file_inode_operations_dotl = {
809 .getattr = v9fs_vfs_getattr_dotl,
810 .setattr = v9fs_vfs_setattr_dotl,
811 .setxattr = generic_setxattr,
812 .getxattr = generic_getxattr,
813 .removexattr = generic_removexattr,
814 .listxattr = v9fs_listxattr,
815 .check_acl = v9fs_check_acl,
816};
817
818const struct inode_operations v9fs_symlink_inode_operations_dotl = {
31b6ceac 819 .readlink = generic_readlink,
53c06f4e
AK		 820 .follow_link = v9fs_vfs_follow_link_dotl,
821 .put_link = v9fs_vfs_put_link,
822 .getattr = v9fs_vfs_getattr_dotl,
823 .setattr = v9fs_vfs_setattr_dotl,
824 .setxattr = generic_setxattr,
825 .getxattr = generic_getxattr,
826 .removexattr = generic_removexattr,
827 .listxattr = v9fs_listxattr,
828};
Linux kernel - Deliverables
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