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19#include <linux/time.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/fcntl.h>
23#include <linux/stat.h>
24#include <linux/nfs_fs.h>
25#include <linux/nfs_mount.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/pagemap.h>
29#include <linux/aio.h>
30
31#include <asm/uaccess.h>
32#include <asm/system.h>
33
34#include "delegation.h"
35#include "internal.h"
36#include "iostat.h"
37#include "fscache.h"
38
39#define NFSDBG_FACILITY NFSDBG_FILE
40
41static int nfs_file_open(struct inode *, struct file *);
42static int nfs_file_release(struct inode *, struct file *);
43static loff_t nfs_file_llseek(struct file *file, loff_t offset, int origin);
44static int nfs_file_mmap(struct file *, struct vm_area_struct *);
45static ssize_t nfs_file_splice_read(struct file *filp, loff_t *ppos,
46 struct pipe_inode_info *pipe,
47 size_t count, unsigned int flags);
48static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov,
49 unsigned long nr_segs, loff_t pos);
50static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
51 struct file *filp, loff_t *ppos,
52 size_t count, unsigned int flags);
53static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov,
54 unsigned long nr_segs, loff_t pos);
55static int nfs_file_flush(struct file *, fl_owner_t id);
56static int nfs_file_fsync(struct file *, struct dentry *dentry, int datasync);
57static int nfs_check_flags(int flags);
58static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl);
59static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl);
60static int nfs_setlease(struct file *file, long arg, struct file_lock **fl);
61
62static const struct vm_operations_struct nfs_file_vm_ops;
63
64const struct file_operations nfs_file_operations = {
65 .llseek = nfs_file_llseek,
66 .read = do_sync_read,
67 .write = do_sync_write,
68 .aio_read = nfs_file_read,
69 .aio_write = nfs_file_write,
70 .mmap = nfs_file_mmap,
71 .open = nfs_file_open,
72 .flush = nfs_file_flush,
73 .release = nfs_file_release,
74 .fsync = nfs_file_fsync,
75 .lock = nfs_lock,
76 .flock = nfs_flock,
77 .splice_read = nfs_file_splice_read,
78 .splice_write = nfs_file_splice_write,
79 .check_flags = nfs_check_flags,
80 .setlease = nfs_setlease,
81};
82
83const struct inode_operations nfs_file_inode_operations = {
84 .permission = nfs_permission,
85 .getattr = nfs_getattr,
86 .setattr = nfs_setattr,
87};
88
89#ifdef CONFIG_NFS_V3
90const struct inode_operations nfs3_file_inode_operations = {
91 .permission = nfs_permission,
92 .getattr = nfs_getattr,
93 .setattr = nfs_setattr,
94 .listxattr = nfs3_listxattr,
95 .getxattr = nfs3_getxattr,
96 .setxattr = nfs3_setxattr,
97 .removexattr = nfs3_removexattr,
98};
99#endif
100
101
102#ifndef IS_SWAPFILE
103# define IS_SWAPFILE(inode) (0)
104#endif
105
106static int nfs_check_flags(int flags)
107{
108 if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT))
109 return -EINVAL;
110
111 return 0;
112}
113
114
115
116
117static int
118nfs_file_open(struct inode *inode, struct file *filp)
119{
120 int res;
121
122 dprintk("NFS: open file(%s/%s)\n",
123 filp->f_path.dentry->d_parent->d_name.name,
124 filp->f_path.dentry->d_name.name);
125
126 res = nfs_check_flags(filp->f_flags);
127 if (res)
128 return res;
129
130 nfs_inc_stats(inode, NFSIOS_VFSOPEN);
131 res = nfs_open(inode, filp);
132 return res;
133}
134
135static int
136nfs_file_release(struct inode *inode, struct file *filp)
137{
138 struct dentry *dentry = filp->f_path.dentry;
139
140 dprintk("NFS: release(%s/%s)\n",
141 dentry->d_parent->d_name.name,
142 dentry->d_name.name);
143
144 nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
145 return nfs_release(inode, filp);
146}
147
148
149
150
151
152
153
154
155
156
157
158
159static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
160{
161 struct nfs_server *server = NFS_SERVER(inode);
162 struct nfs_inode *nfsi = NFS_I(inode);
163
164 if (server->flags & NFS_MOUNT_NOAC)
165 goto force_reval;
166 if (filp->f_flags & O_DIRECT)
167 goto force_reval;
168 if (nfsi->npages != 0)
169 return 0;
170 if (!(nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) && !nfs_attribute_timeout(inode))
171 return 0;
172force_reval:
173 return __nfs_revalidate_inode(server, inode);
174}
175
176static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
177{
178 loff_t loff;
179
180 dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
181 filp->f_path.dentry->d_parent->d_name.name,
182 filp->f_path.dentry->d_name.name,
183 offset, origin);
184
185
186 if (origin == SEEK_END) {
187 struct inode *inode = filp->f_mapping->host;
188
189 int retval = nfs_revalidate_file_size(inode, filp);
190 if (retval < 0)
191 return (loff_t)retval;
192
193 spin_lock(&inode->i_lock);
194 loff = generic_file_llseek_unlocked(filp, offset, origin);
195 spin_unlock(&inode->i_lock);
196 } else
197 loff = generic_file_llseek_unlocked(filp, offset, origin);
198 return loff;
199}
200
201
202
203
204
205
206
207
208
209
210
211static int nfs_do_fsync(struct nfs_open_context *ctx, struct inode *inode)
212{
213 int have_error, status;
214 int ret = 0;
215
216 have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
217 status = nfs_wb_all(inode);
218 have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
219 if (have_error)
220 ret = xchg(&ctx->error, 0);
221 if (!ret)
222 ret = status;
223 return ret;
224}
225
226
227
228
229static int
230nfs_file_flush(struct file *file, fl_owner_t id)
231{
232 struct nfs_open_context *ctx = nfs_file_open_context(file);
233 struct dentry *dentry = file->f_path.dentry;
234 struct inode *inode = dentry->d_inode;
235
236 dprintk("NFS: flush(%s/%s)\n",
237 dentry->d_parent->d_name.name,
238 dentry->d_name.name);
239
240 if ((file->f_mode & FMODE_WRITE) == 0)
241 return 0;
242 nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
243
244
245 return nfs_do_fsync(ctx, inode);
246}
247
248static ssize_t
249nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
250 unsigned long nr_segs, loff_t pos)
251{
252 struct dentry * dentry = iocb->ki_filp->f_path.dentry;
253 struct inode * inode = dentry->d_inode;
254 ssize_t result;
255 size_t count = iov_length(iov, nr_segs);
256
257 if (iocb->ki_filp->f_flags & O_DIRECT)
258 return nfs_file_direct_read(iocb, iov, nr_segs, pos);
259
260 dprintk("NFS: read(%s/%s, %lu@%lu)\n",
261 dentry->d_parent->d_name.name, dentry->d_name.name,
262 (unsigned long) count, (unsigned long) pos);
263
264 result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
265 nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, count);
266 if (!result)
267 result = generic_file_aio_read(iocb, iov, nr_segs, pos);
268 return result;
269}
270
271static ssize_t
272nfs_file_splice_read(struct file *filp, loff_t *ppos,
273 struct pipe_inode_info *pipe, size_t count,
274 unsigned int flags)
275{
276 struct dentry *dentry = filp->f_path.dentry;
277 struct inode *inode = dentry->d_inode;
278 ssize_t res;
279
280 dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n",
281 dentry->d_parent->d_name.name, dentry->d_name.name,
282 (unsigned long) count, (unsigned long long) *ppos);
283
284 res = nfs_revalidate_mapping(inode, filp->f_mapping);
285 if (!res)
286 res = generic_file_splice_read(filp, ppos, pipe, count, flags);
287 return res;
288}
289
290static int
291nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
292{
293 struct dentry *dentry = file->f_path.dentry;
294 struct inode *inode = dentry->d_inode;
295 int status;
296
297 dprintk("NFS: mmap(%s/%s)\n",
298 dentry->d_parent->d_name.name, dentry->d_name.name);
299
300
301
302
303 status = generic_file_mmap(file, vma);
304 if (!status) {
305 vma->vm_ops = &nfs_file_vm_ops;
306 status = nfs_revalidate_mapping(inode, file->f_mapping);
307 }
308 return status;
309}
310
311
312
313
314
315
316static int
317nfs_file_fsync(struct file *file, struct dentry *dentry, int datasync)
318{
319 struct nfs_open_context *ctx = nfs_file_open_context(file);
320 struct inode *inode = dentry->d_inode;
321
322 dprintk("NFS: fsync file(%s/%s) datasync %d\n",
323 dentry->d_parent->d_name.name, dentry->d_name.name,
324 datasync);
325
326 nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
327 return nfs_do_fsync(ctx, inode);
328}
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350static int nfs_want_read_modify_write(struct file *file, struct page *page,
351 loff_t pos, unsigned len)
352{
353 unsigned int pglen = nfs_page_length(page);
354 unsigned int offset = pos & (PAGE_CACHE_SIZE - 1);
355 unsigned int end = offset + len;
356
357 if ((file->f_mode & FMODE_READ) &&
358 !PageUptodate(page) &&
359 !PagePrivate(page) &&
360 pglen &&
361 (end < pglen || offset))
362 return 1;
363 return 0;
364}
365
366
367
368
369
370
371
372
373
374static int nfs_write_begin(struct file *file, struct address_space *mapping,
375 loff_t pos, unsigned len, unsigned flags,
376 struct page **pagep, void **fsdata)
377{
378 int ret;
379 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
380 struct page *page;
381 int once_thru = 0;
382
383 dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n",
384 file->f_path.dentry->d_parent->d_name.name,
385 file->f_path.dentry->d_name.name,
386 mapping->host->i_ino, len, (long long) pos);
387
388start:
389
390
391
392
393 ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING,
394 nfs_wait_bit_killable, TASK_KILLABLE);
395 if (ret)
396 return ret;
397
398 page = grab_cache_page_write_begin(mapping, index, flags);
399 if (!page)
400 return -ENOMEM;
401 *pagep = page;
402
403 ret = nfs_flush_incompatible(file, page);
404 if (ret) {
405 unlock_page(page);
406 page_cache_release(page);
407 } else if (!once_thru &&
408 nfs_want_read_modify_write(file, page, pos, len)) {
409 once_thru = 1;
410 ret = nfs_readpage(file, page);
411 page_cache_release(page);
412 if (!ret)
413 goto start;
414 }
415 return ret;
416}
417
418static int nfs_write_end(struct file *file, struct address_space *mapping,
419 loff_t pos, unsigned len, unsigned copied,
420 struct page *page, void *fsdata)
421{
422 unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
423 int status;
424
425 dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n",
426 file->f_path.dentry->d_parent->d_name.name,
427 file->f_path.dentry->d_name.name,
428 mapping->host->i_ino, len, (long long) pos);
429
430
431
432
433
434 if (!PageUptodate(page)) {
435 unsigned pglen = nfs_page_length(page);
436 unsigned end = offset + len;
437
438 if (pglen == 0) {
439 zero_user_segments(page, 0, offset,
440 end, PAGE_CACHE_SIZE);
441 SetPageUptodate(page);
442 } else if (end >= pglen) {
443 zero_user_segment(page, end, PAGE_CACHE_SIZE);
444 if (offset == 0)
445 SetPageUptodate(page);
446 } else
447 zero_user_segment(page, pglen, PAGE_CACHE_SIZE);
448 }
449
450 status = nfs_updatepage(file, page, offset, copied);
451
452 unlock_page(page);
453 page_cache_release(page);
454
455 if (status < 0)
456 return status;
457 return copied;
458}
459
460
461
462
463
464
465
466
467static void nfs_invalidate_page(struct page *page, unsigned long offset)
468{
469 dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset);
470
471 if (offset != 0)
472 return;
473
474 nfs_wb_page_cancel(page->mapping->host, page);
475
476 nfs_fscache_invalidate_page(page, page->mapping->host);
477}
478
479
480
481
482
483
484
485static int nfs_release_page(struct page *page, gfp_t gfp)
486{
487 dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
488
489
490 if (PagePrivate(page))
491 return 0;
492 return nfs_fscache_release_page(page, gfp);
493}
494
495
496
497
498
499
500
501
502
503static int nfs_launder_page(struct page *page)
504{
505 struct inode *inode = page->mapping->host;
506 struct nfs_inode *nfsi = NFS_I(inode);
507
508 dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
509 inode->i_ino, (long long)page_offset(page));
510
511 nfs_fscache_wait_on_page_write(nfsi, page);
512 return nfs_wb_page(inode, page);
513}
514
515const struct address_space_operations nfs_file_aops = {
516 .readpage = nfs_readpage,
517 .readpages = nfs_readpages,
518 .set_page_dirty = __set_page_dirty_nobuffers,
519 .writepage = nfs_writepage,
520 .writepages = nfs_writepages,
521 .write_begin = nfs_write_begin,
522 .write_end = nfs_write_end,
523 .invalidatepage = nfs_invalidate_page,
524 .releasepage = nfs_release_page,
525 .direct_IO = nfs_direct_IO,
526 .migratepage = nfs_migrate_page,
527 .launder_page = nfs_launder_page,
528 .error_remove_page = generic_error_remove_page,
529};
530
531
532
533
534
535
536static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
537{
538 struct page *page = vmf->page;
539 struct file *filp = vma->vm_file;
540 struct dentry *dentry = filp->f_path.dentry;
541 unsigned pagelen;
542 int ret = -EINVAL;
543 struct address_space *mapping;
544
545 dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n",
546 dentry->d_parent->d_name.name, dentry->d_name.name,
547 filp->f_mapping->host->i_ino,
548 (long long)page_offset(page));
549
550
551 nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page);
552
553 lock_page(page);
554 mapping = page->mapping;
555 if (mapping != dentry->d_inode->i_mapping)
556 goto out_unlock;
557
558 ret = 0;
559 pagelen = nfs_page_length(page);
560 if (pagelen == 0)
561 goto out_unlock;
562
563 ret = nfs_flush_incompatible(filp, page);
564 if (ret != 0)
565 goto out_unlock;
566
567 ret = nfs_updatepage(filp, page, 0, pagelen);
568out_unlock:
569 if (!ret)
570 return VM_FAULT_LOCKED;
571 unlock_page(page);
572 return VM_FAULT_SIGBUS;
573}
574
575static const struct vm_operations_struct nfs_file_vm_ops = {
576 .fault = filemap_fault,
577 .page_mkwrite = nfs_vm_page_mkwrite,
578};
579
580static int nfs_need_sync_write(struct file *filp, struct inode *inode)
581{
582 struct nfs_open_context *ctx;
583
584 if (IS_SYNC(inode) || (filp->f_flags & O_SYNC))
585 return 1;
586 ctx = nfs_file_open_context(filp);
587 if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags))
588 return 1;
589 return 0;
590}
591
592static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
593 unsigned long nr_segs, loff_t pos)
594{
595 struct dentry * dentry = iocb->ki_filp->f_path.dentry;
596 struct inode * inode = dentry->d_inode;
597 ssize_t result;
598 size_t count = iov_length(iov, nr_segs);
599
600 if (iocb->ki_filp->f_flags & O_DIRECT)
601 return nfs_file_direct_write(iocb, iov, nr_segs, pos);
602
603 dprintk("NFS: write(%s/%s, %lu@%Ld)\n",
604 dentry->d_parent->d_name.name, dentry->d_name.name,
605 (unsigned long) count, (long long) pos);
606
607 result = -EBUSY;
608 if (IS_SWAPFILE(inode))
609 goto out_swapfile;
610
611
612
613 if (iocb->ki_filp->f_flags & O_APPEND) {
614 result = nfs_revalidate_file_size(inode, iocb->ki_filp);
615 if (result)
616 goto out;
617 }
618
619 result = count;
620 if (!count)
621 goto out;
622
623 nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count);
624 result = generic_file_aio_write(iocb, iov, nr_segs, pos);
625
626 if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) {
627 int err = nfs_do_fsync(nfs_file_open_context(iocb->ki_filp), inode);
628 if (err < 0)
629 result = err;
630 }
631out:
632 return result;
633
634out_swapfile:
635 printk(KERN_INFO "NFS: attempt to write to active swap file!\n");
636 goto out;
637}
638
639static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
640 struct file *filp, loff_t *ppos,
641 size_t count, unsigned int flags)
642{
643 struct dentry *dentry = filp->f_path.dentry;
644 struct inode *inode = dentry->d_inode;
645 ssize_t ret;
646
647 dprintk("NFS splice_write(%s/%s, %lu@%llu)\n",
648 dentry->d_parent->d_name.name, dentry->d_name.name,
649 (unsigned long) count, (unsigned long long) *ppos);
650
651
652
653
654
655 nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count);
656
657 ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
658 if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
659 int err = nfs_do_fsync(nfs_file_open_context(filp), inode);
660 if (err < 0)
661 ret = err;
662 }
663 return ret;
664}
665
666static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
667{
668 struct inode *inode = filp->f_mapping->host;
669 int status = 0;
670
671
672 posix_test_lock(filp, fl);
673 if (fl->fl_type != F_UNLCK) {
674
675 goto out;
676 }
677
678 if (nfs_have_delegation(inode, FMODE_READ))
679 goto out_noconflict;
680
681 if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)
682 goto out_noconflict;
683
684 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
685out:
686 return status;
687out_noconflict:
688 fl->fl_type = F_UNLCK;
689 goto out;
690}
691
692static int do_vfs_lock(struct file *file, struct file_lock *fl)
693{
694 int res = 0;
695 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
696 case FL_POSIX:
697 res = posix_lock_file_wait(file, fl);
698 break;
699 case FL_FLOCK:
700 res = flock_lock_file_wait(file, fl);
701 break;
702 default:
703 BUG();
704 }
705 if (res < 0)
706 dprintk(KERN_WARNING "%s: VFS is out of sync with lock manager"
707 " - error %d!\n",
708 __func__, res);
709 return res;
710}
711
712static int do_unlk(struct file *filp, int cmd, struct file_lock *fl)
713{
714 struct inode *inode = filp->f_mapping->host;
715 int status;
716
717
718
719
720
721 nfs_sync_mapping(filp->f_mapping);
722
723
724
725
726
727
728 if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
729 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
730 else
731 status = do_vfs_lock(filp, fl);
732 return status;
733}
734
735static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
736{
737 struct inode *inode = filp->f_mapping->host;
738 int status;
739
740
741
742
743
744 status = nfs_sync_mapping(filp->f_mapping);
745 if (status != 0)
746 goto out;
747
748
749 if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
750 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
751 else
752 status = do_vfs_lock(filp, fl);
753 if (status < 0)
754 goto out;
755
756
757
758
759 nfs_sync_mapping(filp->f_mapping);
760 if (!nfs_have_delegation(inode, FMODE_READ))
761 nfs_zap_caches(inode);
762out:
763 return status;
764}
765
766
767
768
769static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
770{
771 struct inode *inode = filp->f_mapping->host;
772 int ret = -ENOLCK;
773
774 dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
775 filp->f_path.dentry->d_parent->d_name.name,
776 filp->f_path.dentry->d_name.name,
777 fl->fl_type, fl->fl_flags,
778 (long long)fl->fl_start, (long long)fl->fl_end);
779
780 nfs_inc_stats(inode, NFSIOS_VFSLOCK);
781
782
783 if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
784 goto out_err;
785
786 if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
787 ret = NFS_PROTO(inode)->lock_check_bounds(fl);
788 if (ret < 0)
789 goto out_err;
790 }
791
792 if (IS_GETLK(cmd))
793 ret = do_getlk(filp, cmd, fl);
794 else if (fl->fl_type == F_UNLCK)
795 ret = do_unlk(filp, cmd, fl);
796 else
797 ret = do_setlk(filp, cmd, fl);
798out_err:
799 return ret;
800}
801
802
803
804
805static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
806{
807 dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
808 filp->f_path.dentry->d_parent->d_name.name,
809 filp->f_path.dentry->d_name.name,
810 fl->fl_type, fl->fl_flags);
811
812 if (!(fl->fl_flags & FL_FLOCK))
813 return -ENOLCK;
814
815
816 fl->fl_owner = (fl_owner_t)filp;
817 fl->fl_start = 0;
818 fl->fl_end = OFFSET_MAX;
819
820 if (fl->fl_type == F_UNLCK)
821 return do_unlk(filp, cmd, fl);
822 return do_setlk(filp, cmd, fl);
823}
824
825
826
827
828
829static int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
830{
831 dprintk("NFS: setlease(%s/%s, arg=%ld)\n",
832 file->f_path.dentry->d_parent->d_name.name,
833 file->f_path.dentry->d_name.name, arg);
834
835 return -EINVAL;
836}
837