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-rw-r--r--fs/9p/vfs_inode_dotl.c824
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diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
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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 }
199
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);
204 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
205 fid = NULL;
206 goto error;
207 }
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 }
214 d_instantiate(dentry, inode);
215 err = v9fs_fid_add(dentry, fid);
216 if (err < 0)
217 goto error;
218
219 /* Now set the ACL based on the default value */
220 v9fs_set_create_acl(dentry, dacl, pacl);
221
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)) {
225 p9_client_clunk(ofid);
226 return PTR_ERR(filp);
227 }
228 filp->private_data = ofid;
229 return 0;
230
231error:
232 if (ofid)
233 p9_client_clunk(ofid);
234 if (fid)
235 p9_client_clunk(fid);
236 return err;
237}
238
239/**
240 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
241 * @dir: inode that is being unlinked
242 * @dentry: dentry that is being unlinked
243 * @mode: mode for new directory
244 *
245 */
246
247static int v9fs_vfs_mkdir_dotl(struct inode *dir,
248 struct dentry *dentry, int omode)
249{
250 int err;
251 struct v9fs_session_info *v9ses;
252 struct p9_fid *fid = NULL, *dfid = NULL;
253 gid_t gid;
254 char *name;
255 mode_t mode;
256 struct inode *inode;
257 struct p9_qid qid;
258 struct dentry *dir_dentry;
259 struct posix_acl *dacl = NULL, *pacl = NULL;
260
261 P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
262 err = 0;
263 v9ses = v9fs_inode2v9ses(dir);
264
265 omode |= S_IFDIR;
266 if (dir->i_mode & S_ISGID)
267 omode |= S_ISGID;
268
269 dir_dentry = v9fs_dentry_from_dir_inode(dir);
270 dfid = v9fs_fid_lookup(dir_dentry);
271 if (IS_ERR(dfid)) {
272 err = PTR_ERR(dfid);
273 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
274 dfid = NULL;
275 goto error;
276 }
277
278 gid = v9fs_get_fsgid_for_create(dir);
279 mode = omode;
280 /* Update mode based on ACL value */
281 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
282 if (err) {
283 P9_DPRINTK(P9_DEBUG_VFS,
284 "Failed to get acl values in mkdir %d\n", err);
285 goto error;
286 }
287 name = (char *) dentry->d_name.name;
288 err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
289 if (err < 0)
290 goto error;
291
292 /* instantiate inode and assign the unopened fid to the dentry */
293 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
294 fid = p9_client_walk(dfid, 1, &name, 1);
295 if (IS_ERR(fid)) {
296 err = PTR_ERR(fid);
297 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
298 err);
299 fid = NULL;
300 goto error;
301 }
302
303 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
304 if (IS_ERR(inode)) {
305 err = PTR_ERR(inode);
306 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
307 err);
308 goto error;
309 }
310 d_instantiate(dentry, inode);
311 err = v9fs_fid_add(dentry, fid);
312 if (err < 0)
313 goto error;
314 fid = NULL;
315 } else {
316 /*
317 * Not in cached mode. No need to populate
318 * inode with stat. We need to get an inode
319 * so that we can set the acl with dentry
320 */
321 inode = v9fs_get_inode(dir->i_sb, mode);
322 if (IS_ERR(inode)) {
323 err = PTR_ERR(inode);
324 goto error;
325 }
326 d_instantiate(dentry, inode);
327 }
328 /* Now set the ACL based on the default value */
329 v9fs_set_create_acl(dentry, dacl, pacl);
330
331error:
332 if (fid)
333 p9_client_clunk(fid);
334 return err;
335}
336
337static int
338v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
339 struct kstat *stat)
340{
341 int err;
342 struct v9fs_session_info *v9ses;
343 struct p9_fid *fid;
344 struct p9_stat_dotl *st;
345
346 P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
347 err = -EPERM;
348 v9ses = v9fs_inode2v9ses(dentry->d_inode);
349 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
350 return simple_getattr(mnt, dentry, stat);
351
352 fid = v9fs_fid_lookup(dentry);
353 if (IS_ERR(fid))
354 return PTR_ERR(fid);
355
356 /* Ask for all the fields in stat structure. Server will return
357 * whatever it supports
358 */
359
360 st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
361 if (IS_ERR(st))
362 return PTR_ERR(st);
363
364 v9fs_stat2inode_dotl(st, dentry->d_inode);
365 generic_fillattr(dentry->d_inode, stat);
366 /* Change block size to what the server returned */
367 stat->blksize = st->st_blksize;
368
369 kfree(st);
370 return 0;
371}
372
373/**
374 * v9fs_vfs_setattr_dotl - set file metadata
375 * @dentry: file whose metadata to set
376 * @iattr: metadata assignment structure
377 *
378 */
379
380int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
381{
382 int retval;
383 struct v9fs_session_info *v9ses;
384 struct p9_fid *fid;
385 struct p9_iattr_dotl p9attr;
386
387 P9_DPRINTK(P9_DEBUG_VFS, "\n");
388
389 retval = inode_change_ok(dentry->d_inode, iattr);
390 if (retval)
391 return retval;
392
393 p9attr.valid = iattr->ia_valid;
394 p9attr.mode = iattr->ia_mode;
395 p9attr.uid = iattr->ia_uid;
396 p9attr.gid = iattr->ia_gid;
397 p9attr.size = iattr->ia_size;
398 p9attr.atime_sec = iattr->ia_atime.tv_sec;
399 p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
400 p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
401 p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
402
403 retval = -EPERM;
404 v9ses = v9fs_inode2v9ses(dentry->d_inode);
405 fid = v9fs_fid_lookup(dentry);
406 if (IS_ERR(fid))
407 return PTR_ERR(fid);
408
409 retval = p9_client_setattr(fid, &p9attr);
410 if (retval < 0)
411 return retval;
412
413 if ((iattr->ia_valid & ATTR_SIZE) &&
414 iattr->ia_size != i_size_read(dentry->d_inode)) {
415 retval = vmtruncate(dentry->d_inode, iattr->ia_size);
416 if (retval)
417 return retval;
418 }
419
420 setattr_copy(dentry->d_inode, iattr);
421 mark_inode_dirty(dentry->d_inode);
422 if (iattr->ia_valid & ATTR_MODE) {
423 /* We also want to update ACL when we update mode bits */
424 retval = v9fs_acl_chmod(dentry);
425 if (retval < 0)
426 return retval;
427 }
428 return 0;
429}
430
431/**
432 * v9fs_stat2inode_dotl - populate an inode structure with stat info
433 * @stat: stat structure
434 * @inode: inode to populate
435 * @sb: superblock of filesystem
436 *
437 */
438
439void
440v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
441{
442
443 if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
444 inode->i_atime.tv_sec = stat->st_atime_sec;
445 inode->i_atime.tv_nsec = stat->st_atime_nsec;
446 inode->i_mtime.tv_sec = stat->st_mtime_sec;
447 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
448 inode->i_ctime.tv_sec = stat->st_ctime_sec;
449 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
450 inode->i_uid = stat->st_uid;
451 inode->i_gid = stat->st_gid;
452 inode->i_nlink = stat->st_nlink;
453 inode->i_mode = stat->st_mode;
454 inode->i_rdev = new_decode_dev(stat->st_rdev);
455
456 if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
457 init_special_inode(inode, inode->i_mode, inode->i_rdev);
458
459 i_size_write(inode, stat->st_size);
460 inode->i_blocks = stat->st_blocks;
461 } else {
462 if (stat->st_result_mask & P9_STATS_ATIME) {
463 inode->i_atime.tv_sec = stat->st_atime_sec;
464 inode->i_atime.tv_nsec = stat->st_atime_nsec;
465 }
466 if (stat->st_result_mask & P9_STATS_MTIME) {
467 inode->i_mtime.tv_sec = stat->st_mtime_sec;
468 inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
469 }
470 if (stat->st_result_mask & P9_STATS_CTIME) {
471 inode->i_ctime.tv_sec = stat->st_ctime_sec;
472 inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
473 }
474 if (stat->st_result_mask & P9_STATS_UID)
475 inode->i_uid = stat->st_uid;
476 if (stat->st_result_mask & P9_STATS_GID)
477 inode->i_gid = stat->st_gid;
478 if (stat->st_result_mask & P9_STATS_NLINK)
479 inode->i_nlink = stat->st_nlink;
480 if (stat->st_result_mask & P9_STATS_MODE) {
481 inode->i_mode = stat->st_mode;
482 if ((S_ISBLK(inode->i_mode)) ||
483 (S_ISCHR(inode->i_mode)))
484 init_special_inode(inode, inode->i_mode,
485 inode->i_rdev);
486 }
487 if (stat->st_result_mask & P9_STATS_RDEV)
488 inode->i_rdev = new_decode_dev(stat->st_rdev);
489 if (stat->st_result_mask & P9_STATS_SIZE)
490 i_size_write(inode, stat->st_size);
491 if (stat->st_result_mask & P9_STATS_BLOCKS)
492 inode->i_blocks = stat->st_blocks;
493 }
494 if (stat->st_result_mask & P9_STATS_GEN)
495 inode->i_generation = stat->st_gen;
496
497 /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
498 * because the inode structure does not have fields for them.
499 */
500}
501
502static int
503v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
504 const char *symname)
505{
506 struct v9fs_session_info *v9ses;
507 struct p9_fid *dfid;
508 struct p9_fid *fid = NULL;
509 struct inode *inode;
510 struct p9_qid qid;
511 char *name;
512 int err;
513 gid_t gid;
514
515 name = (char *) dentry->d_name.name;
516 P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n",
517 dir->i_ino, name, symname);
518 v9ses = v9fs_inode2v9ses(dir);
519
520 dfid = v9fs_fid_lookup(dentry->d_parent);
521 if (IS_ERR(dfid)) {
522 err = PTR_ERR(dfid);
523 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
524 return err;
525 }
526
527 gid = v9fs_get_fsgid_for_create(dir);
528
529 /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
530 err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid);
531
532 if (err < 0) {
533 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
534 goto error;
535 }
536
537 if (v9ses->cache) {
538 /* Now walk from the parent so we can get an unopened fid. */
539 fid = p9_client_walk(dfid, 1, &name, 1);
540 if (IS_ERR(fid)) {
541 err = PTR_ERR(fid);
542 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
543 err);
544 fid = NULL;
545 goto error;
546 }
547
548 /* instantiate inode and assign the unopened fid to dentry */
549 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
550 if (IS_ERR(inode)) {
551 err = PTR_ERR(inode);
552 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
553 err);
554 goto error;
555 }
556 d_instantiate(dentry, inode);
557 err = v9fs_fid_add(dentry, fid);
558 if (err < 0)
559 goto error;
560 fid = NULL;
561 } else {
562 /* Not in cached mode. No need to populate inode with stat */
563 inode = v9fs_get_inode(dir->i_sb, S_IFLNK);
564 if (IS_ERR(inode)) {
565 err = PTR_ERR(inode);
566 goto error;
567 }
568 d_instantiate(dentry, inode);
569 }
570
571error:
572 if (fid)
573 p9_client_clunk(fid);
574
575 return err;
576}
577
578/**
579 * v9fs_vfs_link_dotl - create a hardlink for dotl
580 * @old_dentry: dentry for file to link to
581 * @dir: inode destination for new link
582 * @dentry: dentry for link
583 *
584 */
585
586static int
587v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
588 struct dentry *dentry)
589{
590 int err;
591 struct p9_fid *dfid, *oldfid;
592 char *name;
593 struct v9fs_session_info *v9ses;
594 struct dentry *dir_dentry;
595
596 P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
597 dir->i_ino, old_dentry->d_name.name,
598 dentry->d_name.name);
599
600 v9ses = v9fs_inode2v9ses(dir);
601 dir_dentry = v9fs_dentry_from_dir_inode(dir);
602 dfid = v9fs_fid_lookup(dir_dentry);
603 if (IS_ERR(dfid))
604 return PTR_ERR(dfid);
605
606 oldfid = v9fs_fid_lookup(old_dentry);
607 if (IS_ERR(oldfid))
608 return PTR_ERR(oldfid);
609
610 name = (char *) dentry->d_name.name;
611
612 err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
613
614 if (err < 0) {
615 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
616 return err;
617 }
618
619 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
620 /* Get the latest stat info from server. */
621 struct p9_fid *fid;
622 struct p9_stat_dotl *st;
623
624 fid = v9fs_fid_lookup(old_dentry);
625 if (IS_ERR(fid))
626 return PTR_ERR(fid);
627
628 st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
629 if (IS_ERR(st))
630 return PTR_ERR(st);
631
632 v9fs_stat2inode_dotl(st, old_dentry->d_inode);
633
634 kfree(st);
635 } else {
636 /* Caching disabled. No need to get upto date stat info.
637 * This dentry will be released immediately. So, just hold the
638 * inode
639 */
640 ihold(old_dentry->d_inode);
641 }
642 d_instantiate(dentry, old_dentry->d_inode);
643
644 return err;
645}
646
647/**
648 * v9fs_vfs_mknod_dotl - create a special file
649 * @dir: inode destination for new link
650 * @dentry: dentry for file
651 * @mode: mode for creation
652 * @rdev: device associated with special file
653 *
654 */
655static int
656v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode,
657 dev_t rdev)
658{
659 int err;
660 char *name;
661 mode_t mode;
662 struct v9fs_session_info *v9ses;
663 struct p9_fid *fid = NULL, *dfid = NULL;
664 struct inode *inode;
665 gid_t gid;
666 struct p9_qid qid;
667 struct dentry *dir_dentry;
668 struct posix_acl *dacl = NULL, *pacl = NULL;
669
670 P9_DPRINTK(P9_DEBUG_VFS,
671 " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
672 dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev));
673
674 if (!new_valid_dev(rdev))
675 return -EINVAL;
676
677 v9ses = v9fs_inode2v9ses(dir);
678 dir_dentry = v9fs_dentry_from_dir_inode(dir);
679 dfid = v9fs_fid_lookup(dir_dentry);
680 if (IS_ERR(dfid)) {
681 err = PTR_ERR(dfid);
682 P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
683 dfid = NULL;
684 goto error;
685 }
686
687 gid = v9fs_get_fsgid_for_create(dir);
688 mode = omode;
689 /* Update mode based on ACL value */
690 err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
691 if (err) {
692 P9_DPRINTK(P9_DEBUG_VFS,
693 "Failed to get acl values in mknod %d\n", err);
694 goto error;
695 }
696 name = (char *) dentry->d_name.name;
697
698 err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
699 if (err < 0)
700 goto error;
701
702 /* instantiate inode and assign the unopened fid to the dentry */
703 if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
704 fid = p9_client_walk(dfid, 1, &name, 1);
705 if (IS_ERR(fid)) {
706 err = PTR_ERR(fid);
707 P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
708 err);
709 fid = NULL;
710 goto error;
711 }
712
713 inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
714 if (IS_ERR(inode)) {
715 err = PTR_ERR(inode);
716 P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
717 err);
718 goto error;
719 }
720 d_instantiate(dentry, inode);
721 err = v9fs_fid_add(dentry, fid);
722 if (err < 0)
723 goto error;
724 fid = NULL;
725 } else {
726 /*
727 * Not in cached mode. No need to populate inode with stat.
728 * socket syscall returns a fd, so we need instantiate
729 */
730 inode = v9fs_get_inode(dir->i_sb, mode);
731 if (IS_ERR(inode)) {
732 err = PTR_ERR(inode);
733 goto error;
734 }
735 d_instantiate(dentry, inode);
736 }
737 /* Now set the ACL based on the default value */
738 v9fs_set_create_acl(dentry, dacl, pacl);
739error:
740 if (fid)
741 p9_client_clunk(fid);
742 return err;
743}
744
745/**
746 * v9fs_vfs_follow_link_dotl - follow a symlink path
747 * @dentry: dentry for symlink
748 * @nd: nameidata
749 *
750 */
751
752static void *
753v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd)
754{
755 int retval;
756 struct p9_fid *fid;
757 char *link = __getname();
758 char *target;
759
760 P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name);
761
762 if (!link) {
763 link = ERR_PTR(-ENOMEM);
764 goto ndset;
765 }
766 fid = v9fs_fid_lookup(dentry);
767 if (IS_ERR(fid)) {
768 __putname(link);
769 link = ERR_PTR(PTR_ERR(fid));
770 goto ndset;
771 }
772 retval = p9_client_readlink(fid, &target);
773 if (!retval) {
774 strcpy(link, target);
775 kfree(target);
776 goto ndset;
777 }
778 __putname(link);
779 link = ERR_PTR(retval);
780ndset:
781 nd_set_link(nd, link);
782 return NULL;
783}
784
785const struct inode_operations v9fs_dir_inode_operations_dotl = {
786 .create = v9fs_vfs_create_dotl,
787 .lookup = v9fs_vfs_lookup,
788 .link = v9fs_vfs_link_dotl,
789 .symlink = v9fs_vfs_symlink_dotl,
790 .unlink = v9fs_vfs_unlink,
791 .mkdir = v9fs_vfs_mkdir_dotl,
792 .rmdir = v9fs_vfs_rmdir,
793 .mknod = v9fs_vfs_mknod_dotl,
794 .rename = v9fs_vfs_rename,
795 .getattr = v9fs_vfs_getattr_dotl,
796 .setattr = v9fs_vfs_setattr_dotl,
797 .setxattr = generic_setxattr,
798 .getxattr = generic_getxattr,
799 .removexattr = generic_removexattr,
800 .listxattr = v9fs_listxattr,
801 .check_acl = v9fs_check_acl,
802};
803
804const struct inode_operations v9fs_file_inode_operations_dotl = {
805 .getattr = v9fs_vfs_getattr_dotl,
806 .setattr = v9fs_vfs_setattr_dotl,
807 .setxattr = generic_setxattr,
808 .getxattr = generic_getxattr,
809 .removexattr = generic_removexattr,
810 .listxattr = v9fs_listxattr,
811 .check_acl = v9fs_check_acl,
812};
813
814const struct inode_operations v9fs_symlink_inode_operations_dotl = {
815 .readlink = generic_readlink,
816 .follow_link = v9fs_vfs_follow_link_dotl,
817 .put_link = v9fs_vfs_put_link,
818 .getattr = v9fs_vfs_getattr_dotl,
819 .setattr = v9fs_vfs_setattr_dotl,
820 .setxattr = generic_setxattr,
821 .getxattr = generic_getxattr,
822 .removexattr = generic_removexattr,
823 .listxattr = v9fs_listxattr,
824};
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-26 07:20:44 -0500