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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 * Copyright 2018 Omnibond Systems, L.L.C.
5 *
6 * See COPYING in top-level directory.
7 */
8
9/*
10 * Linux VFS inode operations.
11 */
12
13#include <linux/blkdev.h>
14#include <linux/fileattr.h>
15#include "protocol.h"
16#include "orangefs-kernel.h"
17#include "orangefs-bufmap.h"
18
19static int orangefs_writepage_locked(struct page *page,
20 struct writeback_control *wbc)
21{
22 struct inode *inode = page->mapping->host;
23 struct orangefs_write_range *wr = NULL;
24 struct iov_iter iter;
25 struct bio_vec bv;
26 size_t len, wlen;
27 ssize_t ret;
28 loff_t off;
29
30 set_page_writeback(page);
31
32 len = i_size_read(inode);
33 if (PagePrivate(page)) {
34 wr = (struct orangefs_write_range *)page_private(page);
35 WARN_ON(wr->pos >= len);
36 off = wr->pos;
37 if (off + wr->len > len)
38 wlen = len - off;
39 else
40 wlen = wr->len;
41 } else {
42 WARN_ON(1);
43 off = page_offset(page);
44 if (off + PAGE_SIZE > len)
45 wlen = len - off;
46 else
47 wlen = PAGE_SIZE;
48 }
49 /* Should've been handled in orangefs_invalidate_folio. */
50 WARN_ON(off == len || off + wlen > len);
51
52 WARN_ON(wlen == 0);
53 bvec_set_page(&bv, page, wlen, off % PAGE_SIZE);
54 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
55
56 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
57 len, wr, NULL, NULL);
58 if (ret < 0) {
59 mapping_set_error(page->mapping, ret);
60 } else {
61 ret = 0;
62 }
63 kfree(detach_page_private(page));
64 return ret;
65}
66
67static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
68{
69 int ret;
70 ret = orangefs_writepage_locked(page, wbc);
71 unlock_page(page);
72 end_page_writeback(page);
73 return ret;
74}
75
76struct orangefs_writepages {
77 loff_t off;
78 size_t len;
79 kuid_t uid;
80 kgid_t gid;
81 int maxpages;
82 int npages;
83 struct page **pages;
84 struct bio_vec *bv;
85};
86
87static int orangefs_writepages_work(struct orangefs_writepages *ow,
88 struct writeback_control *wbc)
89{
90 struct inode *inode = ow->pages[0]->mapping->host;
91 struct orangefs_write_range *wrp, wr;
92 struct iov_iter iter;
93 ssize_t ret;
94 size_t len;
95 loff_t off;
96 int i;
97
98 len = i_size_read(inode);
99
100 for (i = 0; i < ow->npages; i++) {
101 set_page_writeback(ow->pages[i]);
102 bvec_set_page(&ow->bv[i], ow->pages[i],
103 min(page_offset(ow->pages[i]) + PAGE_SIZE,
104 ow->off + ow->len) -
105 max(ow->off, page_offset(ow->pages[i])),
106 i == 0 ? ow->off - page_offset(ow->pages[i]) : 0);
107 }
108 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len);
109
110 WARN_ON(ow->off >= len);
111 if (ow->off + ow->len > len)
112 ow->len = len - ow->off;
113
114 off = ow->off;
115 wr.uid = ow->uid;
116 wr.gid = ow->gid;
117 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
118 0, &wr, NULL, NULL);
119 if (ret < 0) {
120 for (i = 0; i < ow->npages; i++) {
121 mapping_set_error(ow->pages[i]->mapping, ret);
122 if (PagePrivate(ow->pages[i])) {
123 wrp = (struct orangefs_write_range *)
124 page_private(ow->pages[i]);
125 ClearPagePrivate(ow->pages[i]);
126 put_page(ow->pages[i]);
127 kfree(wrp);
128 }
129 end_page_writeback(ow->pages[i]);
130 unlock_page(ow->pages[i]);
131 }
132 } else {
133 ret = 0;
134 for (i = 0; i < ow->npages; i++) {
135 if (PagePrivate(ow->pages[i])) {
136 wrp = (struct orangefs_write_range *)
137 page_private(ow->pages[i]);
138 ClearPagePrivate(ow->pages[i]);
139 put_page(ow->pages[i]);
140 kfree(wrp);
141 }
142 end_page_writeback(ow->pages[i]);
143 unlock_page(ow->pages[i]);
144 }
145 }
146 return ret;
147}
148
149static int orangefs_writepages_callback(struct folio *folio,
150 struct writeback_control *wbc, void *data)
151{
152 struct orangefs_writepages *ow = data;
153 struct orangefs_write_range *wr = folio->private;
154 int ret;
155
156 if (!wr) {
157 folio_unlock(folio);
158 /* It's not private so there's nothing to write, right? */
159 printk("writepages_callback not private!\n");
160 BUG();
161 return 0;
162 }
163
164 ret = -1;
165 if (ow->npages == 0) {
166 ow->off = wr->pos;
167 ow->len = wr->len;
168 ow->uid = wr->uid;
169 ow->gid = wr->gid;
170 ow->pages[ow->npages++] = &folio->page;
171 ret = 0;
172 goto done;
173 }
174 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
175 orangefs_writepages_work(ow, wbc);
176 ow->npages = 0;
177 ret = -1;
178 goto done;
179 }
180 if (ow->off + ow->len == wr->pos) {
181 ow->len += wr->len;
182 ow->pages[ow->npages++] = &folio->page;
183 ret = 0;
184 goto done;
185 }
186done:
187 if (ret == -1) {
188 if (ow->npages) {
189 orangefs_writepages_work(ow, wbc);
190 ow->npages = 0;
191 }
192 ret = orangefs_writepage_locked(&folio->page, wbc);
193 mapping_set_error(folio->mapping, ret);
194 folio_unlock(folio);
195 folio_end_writeback(folio);
196 } else {
197 if (ow->npages == ow->maxpages) {
198 orangefs_writepages_work(ow, wbc);
199 ow->npages = 0;
200 }
201 }
202 return ret;
203}
204
205static int orangefs_writepages(struct address_space *mapping,
206 struct writeback_control *wbc)
207{
208 struct orangefs_writepages *ow;
209 struct blk_plug plug;
210 int ret;
211 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
212 if (!ow)
213 return -ENOMEM;
214 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
215 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
216 if (!ow->pages) {
217 kfree(ow);
218 return -ENOMEM;
219 }
220 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
221 if (!ow->bv) {
222 kfree(ow->pages);
223 kfree(ow);
224 return -ENOMEM;
225 }
226 blk_start_plug(&plug);
227 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
228 if (ow->npages)
229 ret = orangefs_writepages_work(ow, wbc);
230 blk_finish_plug(&plug);
231 kfree(ow->pages);
232 kfree(ow->bv);
233 kfree(ow);
234 return ret;
235}
236
237static int orangefs_launder_folio(struct folio *);
238
239static void orangefs_readahead(struct readahead_control *rac)
240{
241 loff_t offset;
242 struct iov_iter iter;
243 struct inode *inode = rac->mapping->host;
244 struct xarray *i_pages;
245 struct folio *folio;
246 loff_t new_start = readahead_pos(rac);
247 int ret;
248 size_t new_len = 0;
249
250 loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
251 loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
252
253 if (pages_remaining >= 1024)
254 new_len = 4194304;
255 else if (pages_remaining > readahead_count(rac))
256 new_len = bytes_remaining;
257
258 if (new_len)
259 readahead_expand(rac, new_start, new_len);
260
261 offset = readahead_pos(rac);
262 i_pages = &rac->mapping->i_pages;
263
264 iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
265
266 /* read in the pages. */
267 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
268 &offset, &iter, readahead_length(rac),
269 inode->i_size, NULL, NULL, rac->file)) < 0)
270 gossip_debug(GOSSIP_FILE_DEBUG,
271 "%s: wait_for_direct_io failed. \n", __func__);
272 else
273 ret = 0;
274
275 /* clean up. */
276 while ((folio = readahead_folio(rac))) {
277 if (!ret)
278 folio_mark_uptodate(folio);
279 folio_unlock(folio);
280 }
281}
282
283static int orangefs_read_folio(struct file *file, struct folio *folio)
284{
285 struct inode *inode = folio->mapping->host;
286 struct iov_iter iter;
287 struct bio_vec bv;
288 ssize_t ret;
289 loff_t off; /* offset of this folio in the file */
290
291 if (folio_test_dirty(folio))
292 orangefs_launder_folio(folio);
293
294 off = folio_pos(folio);
295 bvec_set_folio(&bv, folio, folio_size(folio), 0);
296 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
297
298 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
299 folio_size(folio), inode->i_size, NULL, NULL, file);
300 /* this will only zero remaining unread portions of the folio data */
301 iov_iter_zero(~0U, &iter);
302 /* takes care of potential aliasing */
303 flush_dcache_folio(folio);
304 if (ret > 0)
305 ret = 0;
306 folio_end_read(folio, ret == 0);
307 return ret;
308}
309
310static int orangefs_write_begin(struct file *file,
311 struct address_space *mapping, loff_t pos, unsigned len,
312 struct folio **foliop, void **fsdata)
313{
314 struct orangefs_write_range *wr;
315 struct folio *folio;
316 int ret;
317
318 folio = __filemap_get_folio(mapping, pos / PAGE_SIZE, FGP_WRITEBEGIN,
319 mapping_gfp_mask(mapping));
320 if (IS_ERR(folio))
321 return PTR_ERR(folio);
322
323 *foliop = folio;
324
325 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
326 /*
327 * Should be impossible. If it happens, launder the page
328 * since we don't know what's dirty. This will WARN in
329 * orangefs_writepage_locked.
330 */
331 ret = orangefs_launder_folio(folio);
332 if (ret)
333 return ret;
334 }
335 if (folio_test_private(folio)) {
336 struct orangefs_write_range *wr;
337 wr = folio_get_private(folio);
338 if (wr->pos + wr->len == pos &&
339 uid_eq(wr->uid, current_fsuid()) &&
340 gid_eq(wr->gid, current_fsgid())) {
341 wr->len += len;
342 goto okay;
343 } else {
344 ret = orangefs_launder_folio(folio);
345 if (ret)
346 return ret;
347 }
348 }
349
350 wr = kmalloc(sizeof *wr, GFP_KERNEL);
351 if (!wr)
352 return -ENOMEM;
353
354 wr->pos = pos;
355 wr->len = len;
356 wr->uid = current_fsuid();
357 wr->gid = current_fsgid();
358 folio_attach_private(folio, wr);
359okay:
360 return 0;
361}
362
363static int orangefs_write_end(struct file *file, struct address_space *mapping,
364 loff_t pos, unsigned len, unsigned copied, struct folio *folio,
365 void *fsdata)
366{
367 struct inode *inode = folio->mapping->host;
368 loff_t last_pos = pos + copied;
369
370 /*
371 * No need to use i_size_read() here, the i_size
372 * cannot change under us because we hold the i_mutex.
373 */
374 if (last_pos > inode->i_size)
375 i_size_write(inode, last_pos);
376
377 /* zero the stale part of the folio if we did a short copy */
378 if (!folio_test_uptodate(folio)) {
379 unsigned from = pos & (PAGE_SIZE - 1);
380 if (copied < len) {
381 folio_zero_range(folio, from + copied, len - copied);
382 }
383 /* Set fully written pages uptodate. */
384 if (pos == folio_pos(folio) &&
385 (len == PAGE_SIZE || pos + len == inode->i_size)) {
386 folio_zero_segment(folio, from + copied, PAGE_SIZE);
387 folio_mark_uptodate(folio);
388 }
389 }
390
391 folio_mark_dirty(folio);
392 folio_unlock(folio);
393 folio_put(folio);
394
395 mark_inode_dirty_sync(file_inode(file));
396 return copied;
397}
398
399static void orangefs_invalidate_folio(struct folio *folio,
400 size_t offset, size_t length)
401{
402 struct orangefs_write_range *wr = folio_get_private(folio);
403
404 if (offset == 0 && length == PAGE_SIZE) {
405 kfree(folio_detach_private(folio));
406 return;
407 /* write range entirely within invalidate range (or equal) */
408 } else if (folio_pos(folio) + offset <= wr->pos &&
409 wr->pos + wr->len <= folio_pos(folio) + offset + length) {
410 kfree(folio_detach_private(folio));
411 /* XXX is this right? only caller in fs */
412 folio_cancel_dirty(folio);
413 return;
414 /* invalidate range chops off end of write range */
415 } else if (wr->pos < folio_pos(folio) + offset &&
416 wr->pos + wr->len <= folio_pos(folio) + offset + length &&
417 folio_pos(folio) + offset < wr->pos + wr->len) {
418 size_t x;
419 x = wr->pos + wr->len - (folio_pos(folio) + offset);
420 WARN_ON(x > wr->len);
421 wr->len -= x;
422 wr->uid = current_fsuid();
423 wr->gid = current_fsgid();
424 /* invalidate range chops off beginning of write range */
425 } else if (folio_pos(folio) + offset <= wr->pos &&
426 folio_pos(folio) + offset + length < wr->pos + wr->len &&
427 wr->pos < folio_pos(folio) + offset + length) {
428 size_t x;
429 x = folio_pos(folio) + offset + length - wr->pos;
430 WARN_ON(x > wr->len);
431 wr->pos += x;
432 wr->len -= x;
433 wr->uid = current_fsuid();
434 wr->gid = current_fsgid();
435 /* invalidate range entirely within write range (punch hole) */
436 } else if (wr->pos < folio_pos(folio) + offset &&
437 folio_pos(folio) + offset + length < wr->pos + wr->len) {
438 /* XXX what do we do here... should not WARN_ON */
439 WARN_ON(1);
440 /* punch hole */
441 /*
442 * should we just ignore this and write it out anyway?
443 * it hardly makes sense
444 */
445 return;
446 /* non-overlapping ranges */
447 } else {
448 /* WARN if they do overlap */
449 if (!((folio_pos(folio) + offset + length <= wr->pos) ^
450 (wr->pos + wr->len <= folio_pos(folio) + offset))) {
451 WARN_ON(1);
452 printk("invalidate range offset %llu length %zu\n",
453 folio_pos(folio) + offset, length);
454 printk("write range offset %llu length %zu\n",
455 wr->pos, wr->len);
456 }
457 return;
458 }
459
460 /*
461 * Above there are returns where wr is freed or where we WARN.
462 * Thus the following runs if wr was modified above.
463 */
464
465 orangefs_launder_folio(folio);
466}
467
468static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
469{
470 return !folio_test_private(folio);
471}
472
473static void orangefs_free_folio(struct folio *folio)
474{
475 kfree(folio_detach_private(folio));
476}
477
478static int orangefs_launder_folio(struct folio *folio)
479{
480 int r = 0;
481 struct writeback_control wbc = {
482 .sync_mode = WB_SYNC_ALL,
483 .nr_to_write = 0,
484 };
485 folio_wait_writeback(folio);
486 if (folio_clear_dirty_for_io(folio)) {
487 r = orangefs_writepage_locked(&folio->page, &wbc);
488 folio_end_writeback(folio);
489 }
490 return r;
491}
492
493static ssize_t orangefs_direct_IO(struct kiocb *iocb,
494 struct iov_iter *iter)
495{
496 /*
497 * Comment from original do_readv_writev:
498 * Common entry point for read/write/readv/writev
499 * This function will dispatch it to either the direct I/O
500 * or buffered I/O path depending on the mount options and/or
501 * augmented/extended metadata attached to the file.
502 * Note: File extended attributes override any mount options.
503 */
504 struct file *file = iocb->ki_filp;
505 loff_t pos = iocb->ki_pos;
506 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
507 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
508 loff_t *offset = &pos;
509 struct inode *inode = file->f_mapping->host;
510 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
511 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
512 size_t count = iov_iter_count(iter);
513 ssize_t total_count = 0;
514 ssize_t ret = -EINVAL;
515
516 gossip_debug(GOSSIP_FILE_DEBUG,
517 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
518 __func__,
519 handle,
520 (int)count);
521
522 if (type == ORANGEFS_IO_WRITE) {
523 gossip_debug(GOSSIP_FILE_DEBUG,
524 "%s(%pU): proceeding with offset : %llu, "
525 "size %d\n",
526 __func__,
527 handle,
528 llu(*offset),
529 (int)count);
530 }
531
532 if (count == 0) {
533 ret = 0;
534 goto out;
535 }
536
537 while (iov_iter_count(iter)) {
538 size_t each_count = iov_iter_count(iter);
539 size_t amt_complete;
540
541 /* how much to transfer in this loop iteration */
542 if (each_count > orangefs_bufmap_size_query())
543 each_count = orangefs_bufmap_size_query();
544
545 gossip_debug(GOSSIP_FILE_DEBUG,
546 "%s(%pU): size of each_count(%d)\n",
547 __func__,
548 handle,
549 (int)each_count);
550 gossip_debug(GOSSIP_FILE_DEBUG,
551 "%s(%pU): BEFORE wait_for_io: offset is %d\n",
552 __func__,
553 handle,
554 (int)*offset);
555
556 ret = wait_for_direct_io(type, inode, offset, iter,
557 each_count, 0, NULL, NULL, file);
558 gossip_debug(GOSSIP_FILE_DEBUG,
559 "%s(%pU): return from wait_for_io:%d\n",
560 __func__,
561 handle,
562 (int)ret);
563
564 if (ret < 0)
565 goto out;
566
567 *offset += ret;
568 total_count += ret;
569 amt_complete = ret;
570
571 gossip_debug(GOSSIP_FILE_DEBUG,
572 "%s(%pU): AFTER wait_for_io: offset is %d\n",
573 __func__,
574 handle,
575 (int)*offset);
576
577 /*
578 * if we got a short I/O operations,
579 * fall out and return what we got so far
580 */
581 if (amt_complete < each_count)
582 break;
583 } /*end while */
584
585out:
586 if (total_count > 0)
587 ret = total_count;
588 if (ret > 0) {
589 if (type == ORANGEFS_IO_READ) {
590 file_accessed(file);
591 } else {
592 file_update_time(file);
593 if (*offset > i_size_read(inode))
594 i_size_write(inode, *offset);
595 }
596 }
597
598 gossip_debug(GOSSIP_FILE_DEBUG,
599 "%s(%pU): Value(%d) returned.\n",
600 __func__,
601 handle,
602 (int)ret);
603
604 return ret;
605}
606
607/** ORANGEFS2 implementation of address space operations */
608static const struct address_space_operations orangefs_address_operations = {
609 .writepage = orangefs_writepage,
610 .readahead = orangefs_readahead,
611 .read_folio = orangefs_read_folio,
612 .writepages = orangefs_writepages,
613 .dirty_folio = filemap_dirty_folio,
614 .write_begin = orangefs_write_begin,
615 .write_end = orangefs_write_end,
616 .invalidate_folio = orangefs_invalidate_folio,
617 .release_folio = orangefs_release_folio,
618 .free_folio = orangefs_free_folio,
619 .launder_folio = orangefs_launder_folio,
620 .direct_IO = orangefs_direct_IO,
621};
622
623vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
624{
625 struct folio *folio = page_folio(vmf->page);
626 struct inode *inode = file_inode(vmf->vma->vm_file);
627 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
628 unsigned long *bitlock = &orangefs_inode->bitlock;
629 vm_fault_t ret;
630 struct orangefs_write_range *wr;
631
632 sb_start_pagefault(inode->i_sb);
633
634 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
635 ret = VM_FAULT_RETRY;
636 goto out;
637 }
638
639 folio_lock(folio);
640 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
641 /*
642 * Should be impossible. If it happens, launder the folio
643 * since we don't know what's dirty. This will WARN in
644 * orangefs_writepage_locked.
645 */
646 if (orangefs_launder_folio(folio)) {
647 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
648 goto out;
649 }
650 }
651 if (folio_test_private(folio)) {
652 wr = folio_get_private(folio);
653 if (uid_eq(wr->uid, current_fsuid()) &&
654 gid_eq(wr->gid, current_fsgid())) {
655 wr->pos = page_offset(vmf->page);
656 wr->len = PAGE_SIZE;
657 goto okay;
658 } else {
659 if (orangefs_launder_folio(folio)) {
660 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
661 goto out;
662 }
663 }
664 }
665 wr = kmalloc(sizeof *wr, GFP_KERNEL);
666 if (!wr) {
667 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
668 goto out;
669 }
670 wr->pos = page_offset(vmf->page);
671 wr->len = PAGE_SIZE;
672 wr->uid = current_fsuid();
673 wr->gid = current_fsgid();
674 folio_attach_private(folio, wr);
675okay:
676
677 file_update_time(vmf->vma->vm_file);
678 if (folio->mapping != inode->i_mapping) {
679 folio_unlock(folio);
680 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
681 goto out;
682 }
683
684 /*
685 * We mark the folio dirty already here so that when freeze is in
686 * progress, we are guaranteed that writeback during freezing will
687 * see the dirty folio and writeprotect it again.
688 */
689 folio_mark_dirty(folio);
690 folio_wait_stable(folio);
691 ret = VM_FAULT_LOCKED;
692out:
693 sb_end_pagefault(inode->i_sb);
694 return ret;
695}
696
697static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
698{
699 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
700 struct orangefs_kernel_op_s *new_op;
701 loff_t orig_size;
702 int ret = -EINVAL;
703
704 gossip_debug(GOSSIP_INODE_DEBUG,
705 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
706 __func__,
707 get_khandle_from_ino(inode),
708 &orangefs_inode->refn.khandle,
709 orangefs_inode->refn.fs_id,
710 iattr->ia_size);
711
712 /* Ensure that we have a up to date size, so we know if it changed. */
713 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
714 if (ret == -ESTALE)
715 ret = -EIO;
716 if (ret) {
717 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
718 __func__, ret);
719 return ret;
720 }
721 orig_size = i_size_read(inode);
722
723 /* This is truncate_setsize in a different order. */
724 truncate_pagecache(inode, iattr->ia_size);
725 i_size_write(inode, iattr->ia_size);
726 if (iattr->ia_size > orig_size)
727 pagecache_isize_extended(inode, orig_size, iattr->ia_size);
728
729 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
730 if (!new_op)
731 return -ENOMEM;
732
733 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
734 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
735
736 ret = service_operation(new_op,
737 __func__,
738 get_interruptible_flag(inode));
739
740 /*
741 * the truncate has no downcall members to retrieve, but
742 * the status value tells us if it went through ok or not
743 */
744 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
745
746 op_release(new_op);
747
748 if (ret != 0)
749 return ret;
750
751 if (orig_size != i_size_read(inode))
752 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
753
754 return ret;
755}
756
757int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
758{
759 int ret;
760
761 if (iattr->ia_valid & ATTR_MODE) {
762 if (iattr->ia_mode & (S_ISVTX)) {
763 if (is_root_handle(inode)) {
764 /*
765 * allow sticky bit to be set on root (since
766 * it shows up that way by default anyhow),
767 * but don't show it to the server
768 */
769 iattr->ia_mode -= S_ISVTX;
770 } else {
771 gossip_debug(GOSSIP_UTILS_DEBUG,
772 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
773 ret = -EINVAL;
774 goto out;
775 }
776 }
777 if (iattr->ia_mode & (S_ISUID)) {
778 gossip_debug(GOSSIP_UTILS_DEBUG,
779 "Attempting to set setuid bit (not supported); returning EINVAL.\n");
780 ret = -EINVAL;
781 goto out;
782 }
783 }
784
785 if (iattr->ia_valid & ATTR_SIZE) {
786 ret = orangefs_setattr_size(inode, iattr);
787 if (ret)
788 goto out;
789 }
790
791again:
792 spin_lock(&inode->i_lock);
793 if (ORANGEFS_I(inode)->attr_valid) {
794 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
795 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
796 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
797 } else {
798 spin_unlock(&inode->i_lock);
799 write_inode_now(inode, 1);
800 goto again;
801 }
802 } else {
803 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
804 ORANGEFS_I(inode)->attr_uid = current_fsuid();
805 ORANGEFS_I(inode)->attr_gid = current_fsgid();
806 }
807 setattr_copy(&nop_mnt_idmap, inode, iattr);
808 spin_unlock(&inode->i_lock);
809 mark_inode_dirty(inode);
810
811 ret = 0;
812out:
813 return ret;
814}
815
816int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr)
817{
818 int ret;
819 struct inode *inode = d_inode(dentry);
820
821 ret = __orangefs_setattr(inode, iattr);
822 /* change mode on a file that has ACLs */
823 if (!ret && (iattr->ia_valid & ATTR_MODE))
824 ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode);
825 return ret;
826}
827
828/*
829 * Change attributes of an object referenced by dentry.
830 */
831int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
832 struct iattr *iattr)
833{
834 int ret;
835 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
836 dentry);
837 ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
838 if (ret)
839 goto out;
840 ret = __orangefs_setattr_mode(dentry, iattr);
841 sync_inode_metadata(d_inode(dentry), 1);
842out:
843 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
844 ret);
845 return ret;
846}
847
848/*
849 * Obtain attributes of an object given a dentry
850 */
851int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path,
852 struct kstat *stat, u32 request_mask, unsigned int flags)
853{
854 int ret;
855 struct inode *inode = path->dentry->d_inode;
856
857 gossip_debug(GOSSIP_INODE_DEBUG,
858 "orangefs_getattr: called on %pd mask %u\n",
859 path->dentry, request_mask);
860
861 ret = orangefs_inode_getattr(inode,
862 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
863 if (ret == 0) {
864 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
865
866 /* override block size reported to stat */
867 if (!(request_mask & STATX_SIZE))
868 stat->result_mask &= ~STATX_SIZE;
869
870 generic_fill_statx_attr(inode, stat);
871 }
872 return ret;
873}
874
875int orangefs_permission(struct mnt_idmap *idmap,
876 struct inode *inode, int mask)
877{
878 int ret;
879
880 if (mask & MAY_NOT_BLOCK)
881 return -ECHILD;
882
883 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
884
885 /* Make sure the permission (and other common attrs) are up to date. */
886 ret = orangefs_inode_getattr(inode, 0);
887 if (ret < 0)
888 return ret;
889
890 return generic_permission(&nop_mnt_idmap, inode, mask);
891}
892
893int orangefs_update_time(struct inode *inode, int flags)
894{
895 struct iattr iattr;
896
897 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
898 get_khandle_from_ino(inode));
899 flags = generic_update_time(inode, flags);
900 memset(&iattr, 0, sizeof iattr);
901 if (flags & S_ATIME)
902 iattr.ia_valid |= ATTR_ATIME;
903 if (flags & S_CTIME)
904 iattr.ia_valid |= ATTR_CTIME;
905 if (flags & S_MTIME)
906 iattr.ia_valid |= ATTR_MTIME;
907 return __orangefs_setattr(inode, &iattr);
908}
909
910static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
911{
912 u64 val = 0;
913 int ret;
914
915 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
916 dentry);
917
918 ret = orangefs_inode_getxattr(d_inode(dentry),
919 "user.pvfs2.meta_hint",
920 &val, sizeof(val));
921 if (ret < 0 && ret != -ENODATA)
922 return ret;
923
924 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
925
926 fileattr_fill_flags(fa, val);
927 return 0;
928}
929
930static int orangefs_fileattr_set(struct mnt_idmap *idmap,
931 struct dentry *dentry, struct fileattr *fa)
932{
933 u64 val = 0;
934
935 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
936 dentry);
937 /*
938 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
939 * turned on for a file. The user is not allowed to turn on this bit,
940 * but the bit is present if the user first gets the flags and then
941 * updates the flags with some new settings. So, we ignore it in the
942 * following edit. bligon.
943 */
944 if (fileattr_has_fsx(fa) ||
945 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
946 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
947 __func__);
948 return -EOPNOTSUPP;
949 }
950 val = fa->flags;
951 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
952 return orangefs_inode_setxattr(d_inode(dentry),
953 "user.pvfs2.meta_hint",
954 &val, sizeof(val), 0);
955}
956
957/* ORANGEFS2 implementation of VFS inode operations for files */
958static const struct inode_operations orangefs_file_inode_operations = {
959 .get_inode_acl = orangefs_get_acl,
960 .set_acl = orangefs_set_acl,
961 .setattr = orangefs_setattr,
962 .getattr = orangefs_getattr,
963 .listxattr = orangefs_listxattr,
964 .permission = orangefs_permission,
965 .update_time = orangefs_update_time,
966 .fileattr_get = orangefs_fileattr_get,
967 .fileattr_set = orangefs_fileattr_set,
968};
969
970static int orangefs_init_iops(struct inode *inode)
971{
972 inode->i_mapping->a_ops = &orangefs_address_operations;
973
974 switch (inode->i_mode & S_IFMT) {
975 case S_IFREG:
976 inode->i_op = &orangefs_file_inode_operations;
977 inode->i_fop = &orangefs_file_operations;
978 break;
979 case S_IFLNK:
980 inode->i_op = &orangefs_symlink_inode_operations;
981 break;
982 case S_IFDIR:
983 inode->i_op = &orangefs_dir_inode_operations;
984 inode->i_fop = &orangefs_dir_operations;
985 break;
986 default:
987 gossip_debug(GOSSIP_INODE_DEBUG,
988 "%s: unsupported mode\n",
989 __func__);
990 return -EINVAL;
991 }
992
993 return 0;
994}
995
996/*
997 * Given an ORANGEFS object identifier (fsid, handle), convert it into
998 * a ino_t type that will be used as a hash-index from where the handle will
999 * be searched for in the VFS hash table of inodes.
1000 */
1001static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
1002{
1003 if (!ref)
1004 return 0;
1005 return orangefs_khandle_to_ino(&(ref->khandle));
1006}
1007
1008/*
1009 * Called to set up an inode from iget5_locked.
1010 */
1011static int orangefs_set_inode(struct inode *inode, void *data)
1012{
1013 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1014 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
1015 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
1016 ORANGEFS_I(inode)->attr_valid = 0;
1017 hash_init(ORANGEFS_I(inode)->xattr_cache);
1018 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
1019 ORANGEFS_I(inode)->bitlock = 0;
1020 return 0;
1021}
1022
1023/*
1024 * Called to determine if handles match.
1025 */
1026static int orangefs_test_inode(struct inode *inode, void *data)
1027{
1028 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1029 struct orangefs_inode_s *orangefs_inode = NULL;
1030
1031 orangefs_inode = ORANGEFS_I(inode);
1032 /* test handles and fs_ids... */
1033 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
1034 &(ref->khandle)) &&
1035 orangefs_inode->refn.fs_id == ref->fs_id);
1036}
1037
1038/*
1039 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1040 * file handle.
1041 *
1042 * @sb: the file system super block instance.
1043 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1044 */
1045struct inode *orangefs_iget(struct super_block *sb,
1046 struct orangefs_object_kref *ref)
1047{
1048 struct inode *inode = NULL;
1049 unsigned long hash;
1050 int error;
1051
1052 hash = orangefs_handle_hash(ref);
1053 inode = iget5_locked(sb,
1054 hash,
1055 orangefs_test_inode,
1056 orangefs_set_inode,
1057 ref);
1058
1059 if (!inode)
1060 return ERR_PTR(-ENOMEM);
1061
1062 if (!(inode->i_state & I_NEW))
1063 return inode;
1064
1065 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1066 if (error) {
1067 iget_failed(inode);
1068 return ERR_PTR(error);
1069 }
1070
1071 inode->i_ino = hash; /* needed for stat etc */
1072 orangefs_init_iops(inode);
1073 unlock_new_inode(inode);
1074
1075 gossip_debug(GOSSIP_INODE_DEBUG,
1076 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
1077 &ref->khandle,
1078 ref->fs_id,
1079 hash,
1080 inode->i_ino);
1081
1082 return inode;
1083}
1084
1085/*
1086 * Allocate an inode for a newly created file and insert it into the inode hash.
1087 */
1088struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1089 umode_t mode, dev_t dev, struct orangefs_object_kref *ref)
1090{
1091 struct posix_acl *acl = NULL, *default_acl = NULL;
1092 unsigned long hash = orangefs_handle_hash(ref);
1093 struct inode *inode;
1094 int error;
1095
1096 gossip_debug(GOSSIP_INODE_DEBUG,
1097 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1098 __func__,
1099 sb,
1100 MAJOR(dev),
1101 MINOR(dev),
1102 mode);
1103
1104 inode = new_inode(sb);
1105 if (!inode)
1106 return ERR_PTR(-ENOMEM);
1107
1108 error = posix_acl_create(dir, &mode, &default_acl, &acl);
1109 if (error)
1110 goto out_iput;
1111
1112 orangefs_set_inode(inode, ref);
1113 inode->i_ino = hash; /* needed for stat etc */
1114
1115 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1116 if (error)
1117 goto out_iput;
1118
1119 orangefs_init_iops(inode);
1120 inode->i_rdev = dev;
1121
1122 if (default_acl) {
1123 error = __orangefs_set_acl(inode, default_acl,
1124 ACL_TYPE_DEFAULT);
1125 if (error)
1126 goto out_iput;
1127 }
1128
1129 if (acl) {
1130 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
1131 if (error)
1132 goto out_iput;
1133 }
1134
1135 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
1136 if (error < 0)
1137 goto out_iput;
1138
1139 gossip_debug(GOSSIP_INODE_DEBUG,
1140 "Initializing ACL's for inode %pU\n",
1141 get_khandle_from_ino(inode));
1142 if (mode != inode->i_mode) {
1143 struct iattr iattr = {
1144 .ia_mode = mode,
1145 .ia_valid = ATTR_MODE,
1146 };
1147 inode->i_mode = mode;
1148 __orangefs_setattr(inode, &iattr);
1149 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
1150 }
1151 posix_acl_release(acl);
1152 posix_acl_release(default_acl);
1153 return inode;
1154
1155out_iput:
1156 iput(inode);
1157 posix_acl_release(acl);
1158 posix_acl_release(default_acl);
1159 return ERR_PTR(error);
1160}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 * Copyright 2018 Omnibond Systems, L.L.C.
5 *
6 * See COPYING in top-level directory.
7 */
8
9/*
10 * Linux VFS inode operations.
11 */
12
13#include <linux/blkdev.h>
14#include <linux/fileattr.h>
15#include "protocol.h"
16#include "orangefs-kernel.h"
17#include "orangefs-bufmap.h"
18
19static int orangefs_writepage_locked(struct page *page,
20 struct writeback_control *wbc)
21{
22 struct inode *inode = page->mapping->host;
23 struct orangefs_write_range *wr = NULL;
24 struct iov_iter iter;
25 struct bio_vec bv;
26 size_t len, wlen;
27 ssize_t ret;
28 loff_t off;
29
30 set_page_writeback(page);
31
32 len = i_size_read(inode);
33 if (PagePrivate(page)) {
34 wr = (struct orangefs_write_range *)page_private(page);
35 WARN_ON(wr->pos >= len);
36 off = wr->pos;
37 if (off + wr->len > len)
38 wlen = len - off;
39 else
40 wlen = wr->len;
41 } else {
42 WARN_ON(1);
43 off = page_offset(page);
44 if (off + PAGE_SIZE > len)
45 wlen = len - off;
46 else
47 wlen = PAGE_SIZE;
48 }
49 /* Should've been handled in orangefs_invalidate_folio. */
50 WARN_ON(off == len || off + wlen > len);
51
52 bv.bv_page = page;
53 bv.bv_len = wlen;
54 bv.bv_offset = off % PAGE_SIZE;
55 WARN_ON(wlen == 0);
56 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
57
58 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
59 len, wr, NULL, NULL);
60 if (ret < 0) {
61 SetPageError(page);
62 mapping_set_error(page->mapping, ret);
63 } else {
64 ret = 0;
65 }
66 kfree(detach_page_private(page));
67 return ret;
68}
69
70static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
71{
72 int ret;
73 ret = orangefs_writepage_locked(page, wbc);
74 unlock_page(page);
75 end_page_writeback(page);
76 return ret;
77}
78
79struct orangefs_writepages {
80 loff_t off;
81 size_t len;
82 kuid_t uid;
83 kgid_t gid;
84 int maxpages;
85 int npages;
86 struct page **pages;
87 struct bio_vec *bv;
88};
89
90static int orangefs_writepages_work(struct orangefs_writepages *ow,
91 struct writeback_control *wbc)
92{
93 struct inode *inode = ow->pages[0]->mapping->host;
94 struct orangefs_write_range *wrp, wr;
95 struct iov_iter iter;
96 ssize_t ret;
97 size_t len;
98 loff_t off;
99 int i;
100
101 len = i_size_read(inode);
102
103 for (i = 0; i < ow->npages; i++) {
104 set_page_writeback(ow->pages[i]);
105 ow->bv[i].bv_page = ow->pages[i];
106 ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
107 ow->off + ow->len) -
108 max(ow->off, page_offset(ow->pages[i]));
109 if (i == 0)
110 ow->bv[i].bv_offset = ow->off -
111 page_offset(ow->pages[i]);
112 else
113 ow->bv[i].bv_offset = 0;
114 }
115 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len);
116
117 WARN_ON(ow->off >= len);
118 if (ow->off + ow->len > len)
119 ow->len = len - ow->off;
120
121 off = ow->off;
122 wr.uid = ow->uid;
123 wr.gid = ow->gid;
124 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
125 0, &wr, NULL, NULL);
126 if (ret < 0) {
127 for (i = 0; i < ow->npages; i++) {
128 SetPageError(ow->pages[i]);
129 mapping_set_error(ow->pages[i]->mapping, ret);
130 if (PagePrivate(ow->pages[i])) {
131 wrp = (struct orangefs_write_range *)
132 page_private(ow->pages[i]);
133 ClearPagePrivate(ow->pages[i]);
134 put_page(ow->pages[i]);
135 kfree(wrp);
136 }
137 end_page_writeback(ow->pages[i]);
138 unlock_page(ow->pages[i]);
139 }
140 } else {
141 ret = 0;
142 for (i = 0; i < ow->npages; i++) {
143 if (PagePrivate(ow->pages[i])) {
144 wrp = (struct orangefs_write_range *)
145 page_private(ow->pages[i]);
146 ClearPagePrivate(ow->pages[i]);
147 put_page(ow->pages[i]);
148 kfree(wrp);
149 }
150 end_page_writeback(ow->pages[i]);
151 unlock_page(ow->pages[i]);
152 }
153 }
154 return ret;
155}
156
157static int orangefs_writepages_callback(struct page *page,
158 struct writeback_control *wbc, void *data)
159{
160 struct orangefs_writepages *ow = data;
161 struct orangefs_write_range *wr;
162 int ret;
163
164 if (!PagePrivate(page)) {
165 unlock_page(page);
166 /* It's not private so there's nothing to write, right? */
167 printk("writepages_callback not private!\n");
168 BUG();
169 return 0;
170 }
171 wr = (struct orangefs_write_range *)page_private(page);
172
173 ret = -1;
174 if (ow->npages == 0) {
175 ow->off = wr->pos;
176 ow->len = wr->len;
177 ow->uid = wr->uid;
178 ow->gid = wr->gid;
179 ow->pages[ow->npages++] = page;
180 ret = 0;
181 goto done;
182 }
183 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
184 orangefs_writepages_work(ow, wbc);
185 ow->npages = 0;
186 ret = -1;
187 goto done;
188 }
189 if (ow->off + ow->len == wr->pos) {
190 ow->len += wr->len;
191 ow->pages[ow->npages++] = page;
192 ret = 0;
193 goto done;
194 }
195done:
196 if (ret == -1) {
197 if (ow->npages) {
198 orangefs_writepages_work(ow, wbc);
199 ow->npages = 0;
200 }
201 ret = orangefs_writepage_locked(page, wbc);
202 mapping_set_error(page->mapping, ret);
203 unlock_page(page);
204 end_page_writeback(page);
205 } else {
206 if (ow->npages == ow->maxpages) {
207 orangefs_writepages_work(ow, wbc);
208 ow->npages = 0;
209 }
210 }
211 return ret;
212}
213
214static int orangefs_writepages(struct address_space *mapping,
215 struct writeback_control *wbc)
216{
217 struct orangefs_writepages *ow;
218 struct blk_plug plug;
219 int ret;
220 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
221 if (!ow)
222 return -ENOMEM;
223 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
224 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
225 if (!ow->pages) {
226 kfree(ow);
227 return -ENOMEM;
228 }
229 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
230 if (!ow->bv) {
231 kfree(ow->pages);
232 kfree(ow);
233 return -ENOMEM;
234 }
235 blk_start_plug(&plug);
236 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
237 if (ow->npages)
238 ret = orangefs_writepages_work(ow, wbc);
239 blk_finish_plug(&plug);
240 kfree(ow->pages);
241 kfree(ow->bv);
242 kfree(ow);
243 return ret;
244}
245
246static int orangefs_launder_folio(struct folio *);
247
248static void orangefs_readahead(struct readahead_control *rac)
249{
250 loff_t offset;
251 struct iov_iter iter;
252 struct inode *inode = rac->mapping->host;
253 struct xarray *i_pages;
254 struct page *page;
255 loff_t new_start = readahead_pos(rac);
256 int ret;
257 size_t new_len = 0;
258
259 loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
260 loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
261
262 if (pages_remaining >= 1024)
263 new_len = 4194304;
264 else if (pages_remaining > readahead_count(rac))
265 new_len = bytes_remaining;
266
267 if (new_len)
268 readahead_expand(rac, new_start, new_len);
269
270 offset = readahead_pos(rac);
271 i_pages = &rac->mapping->i_pages;
272
273 iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
274
275 /* read in the pages. */
276 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
277 &offset, &iter, readahead_length(rac),
278 inode->i_size, NULL, NULL, rac->file)) < 0)
279 gossip_debug(GOSSIP_FILE_DEBUG,
280 "%s: wait_for_direct_io failed. \n", __func__);
281 else
282 ret = 0;
283
284 /* clean up. */
285 while ((page = readahead_page(rac))) {
286 page_endio(page, false, ret);
287 put_page(page);
288 }
289}
290
291static int orangefs_read_folio(struct file *file, struct folio *folio)
292{
293 struct inode *inode = folio->mapping->host;
294 struct iov_iter iter;
295 struct bio_vec bv;
296 ssize_t ret;
297 loff_t off; /* offset of this folio in the file */
298
299 if (folio_test_dirty(folio))
300 orangefs_launder_folio(folio);
301
302 off = folio_pos(folio);
303 bv.bv_page = &folio->page;
304 bv.bv_len = folio_size(folio);
305 bv.bv_offset = 0;
306 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
307
308 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
309 folio_size(folio), inode->i_size, NULL, NULL, file);
310 /* this will only zero remaining unread portions of the folio data */
311 iov_iter_zero(~0U, &iter);
312 /* takes care of potential aliasing */
313 flush_dcache_folio(folio);
314 if (ret < 0) {
315 folio_set_error(folio);
316 } else {
317 folio_mark_uptodate(folio);
318 ret = 0;
319 }
320 /* unlock the folio after the ->read_folio() routine completes */
321 folio_unlock(folio);
322 return ret;
323}
324
325static int orangefs_write_begin(struct file *file,
326 struct address_space *mapping, loff_t pos, unsigned len,
327 struct page **pagep, void **fsdata)
328{
329 struct orangefs_write_range *wr;
330 struct folio *folio;
331 struct page *page;
332 pgoff_t index;
333 int ret;
334
335 index = pos >> PAGE_SHIFT;
336
337 page = grab_cache_page_write_begin(mapping, index);
338 if (!page)
339 return -ENOMEM;
340
341 *pagep = page;
342 folio = page_folio(page);
343
344 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
345 /*
346 * Should be impossible. If it happens, launder the page
347 * since we don't know what's dirty. This will WARN in
348 * orangefs_writepage_locked.
349 */
350 ret = orangefs_launder_folio(folio);
351 if (ret)
352 return ret;
353 }
354 if (folio_test_private(folio)) {
355 struct orangefs_write_range *wr;
356 wr = folio_get_private(folio);
357 if (wr->pos + wr->len == pos &&
358 uid_eq(wr->uid, current_fsuid()) &&
359 gid_eq(wr->gid, current_fsgid())) {
360 wr->len += len;
361 goto okay;
362 } else {
363 ret = orangefs_launder_folio(folio);
364 if (ret)
365 return ret;
366 }
367 }
368
369 wr = kmalloc(sizeof *wr, GFP_KERNEL);
370 if (!wr)
371 return -ENOMEM;
372
373 wr->pos = pos;
374 wr->len = len;
375 wr->uid = current_fsuid();
376 wr->gid = current_fsgid();
377 folio_attach_private(folio, wr);
378okay:
379 return 0;
380}
381
382static int orangefs_write_end(struct file *file, struct address_space *mapping,
383 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
384{
385 struct inode *inode = page->mapping->host;
386 loff_t last_pos = pos + copied;
387
388 /*
389 * No need to use i_size_read() here, the i_size
390 * cannot change under us because we hold the i_mutex.
391 */
392 if (last_pos > inode->i_size)
393 i_size_write(inode, last_pos);
394
395 /* zero the stale part of the page if we did a short copy */
396 if (!PageUptodate(page)) {
397 unsigned from = pos & (PAGE_SIZE - 1);
398 if (copied < len) {
399 zero_user(page, from + copied, len - copied);
400 }
401 /* Set fully written pages uptodate. */
402 if (pos == page_offset(page) &&
403 (len == PAGE_SIZE || pos + len == inode->i_size)) {
404 zero_user_segment(page, from + copied, PAGE_SIZE);
405 SetPageUptodate(page);
406 }
407 }
408
409 set_page_dirty(page);
410 unlock_page(page);
411 put_page(page);
412
413 mark_inode_dirty_sync(file_inode(file));
414 return copied;
415}
416
417static void orangefs_invalidate_folio(struct folio *folio,
418 size_t offset, size_t length)
419{
420 struct orangefs_write_range *wr = folio_get_private(folio);
421
422 if (offset == 0 && length == PAGE_SIZE) {
423 kfree(folio_detach_private(folio));
424 return;
425 /* write range entirely within invalidate range (or equal) */
426 } else if (folio_pos(folio) + offset <= wr->pos &&
427 wr->pos + wr->len <= folio_pos(folio) + offset + length) {
428 kfree(folio_detach_private(folio));
429 /* XXX is this right? only caller in fs */
430 folio_cancel_dirty(folio);
431 return;
432 /* invalidate range chops off end of write range */
433 } else if (wr->pos < folio_pos(folio) + offset &&
434 wr->pos + wr->len <= folio_pos(folio) + offset + length &&
435 folio_pos(folio) + offset < wr->pos + wr->len) {
436 size_t x;
437 x = wr->pos + wr->len - (folio_pos(folio) + offset);
438 WARN_ON(x > wr->len);
439 wr->len -= x;
440 wr->uid = current_fsuid();
441 wr->gid = current_fsgid();
442 /* invalidate range chops off beginning of write range */
443 } else if (folio_pos(folio) + offset <= wr->pos &&
444 folio_pos(folio) + offset + length < wr->pos + wr->len &&
445 wr->pos < folio_pos(folio) + offset + length) {
446 size_t x;
447 x = folio_pos(folio) + offset + length - wr->pos;
448 WARN_ON(x > wr->len);
449 wr->pos += x;
450 wr->len -= x;
451 wr->uid = current_fsuid();
452 wr->gid = current_fsgid();
453 /* invalidate range entirely within write range (punch hole) */
454 } else if (wr->pos < folio_pos(folio) + offset &&
455 folio_pos(folio) + offset + length < wr->pos + wr->len) {
456 /* XXX what do we do here... should not WARN_ON */
457 WARN_ON(1);
458 /* punch hole */
459 /*
460 * should we just ignore this and write it out anyway?
461 * it hardly makes sense
462 */
463 return;
464 /* non-overlapping ranges */
465 } else {
466 /* WARN if they do overlap */
467 if (!((folio_pos(folio) + offset + length <= wr->pos) ^
468 (wr->pos + wr->len <= folio_pos(folio) + offset))) {
469 WARN_ON(1);
470 printk("invalidate range offset %llu length %zu\n",
471 folio_pos(folio) + offset, length);
472 printk("write range offset %llu length %zu\n",
473 wr->pos, wr->len);
474 }
475 return;
476 }
477
478 /*
479 * Above there are returns where wr is freed or where we WARN.
480 * Thus the following runs if wr was modified above.
481 */
482
483 orangefs_launder_folio(folio);
484}
485
486static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
487{
488 return !folio_test_private(folio);
489}
490
491static void orangefs_free_folio(struct folio *folio)
492{
493 kfree(folio_detach_private(folio));
494}
495
496static int orangefs_launder_folio(struct folio *folio)
497{
498 int r = 0;
499 struct writeback_control wbc = {
500 .sync_mode = WB_SYNC_ALL,
501 .nr_to_write = 0,
502 };
503 folio_wait_writeback(folio);
504 if (folio_clear_dirty_for_io(folio)) {
505 r = orangefs_writepage_locked(&folio->page, &wbc);
506 folio_end_writeback(folio);
507 }
508 return r;
509}
510
511static ssize_t orangefs_direct_IO(struct kiocb *iocb,
512 struct iov_iter *iter)
513{
514 /*
515 * Comment from original do_readv_writev:
516 * Common entry point for read/write/readv/writev
517 * This function will dispatch it to either the direct I/O
518 * or buffered I/O path depending on the mount options and/or
519 * augmented/extended metadata attached to the file.
520 * Note: File extended attributes override any mount options.
521 */
522 struct file *file = iocb->ki_filp;
523 loff_t pos = iocb->ki_pos;
524 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
525 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
526 loff_t *offset = &pos;
527 struct inode *inode = file->f_mapping->host;
528 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
529 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
530 size_t count = iov_iter_count(iter);
531 ssize_t total_count = 0;
532 ssize_t ret = -EINVAL;
533
534 gossip_debug(GOSSIP_FILE_DEBUG,
535 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
536 __func__,
537 handle,
538 (int)count);
539
540 if (type == ORANGEFS_IO_WRITE) {
541 gossip_debug(GOSSIP_FILE_DEBUG,
542 "%s(%pU): proceeding with offset : %llu, "
543 "size %d\n",
544 __func__,
545 handle,
546 llu(*offset),
547 (int)count);
548 }
549
550 if (count == 0) {
551 ret = 0;
552 goto out;
553 }
554
555 while (iov_iter_count(iter)) {
556 size_t each_count = iov_iter_count(iter);
557 size_t amt_complete;
558
559 /* how much to transfer in this loop iteration */
560 if (each_count > orangefs_bufmap_size_query())
561 each_count = orangefs_bufmap_size_query();
562
563 gossip_debug(GOSSIP_FILE_DEBUG,
564 "%s(%pU): size of each_count(%d)\n",
565 __func__,
566 handle,
567 (int)each_count);
568 gossip_debug(GOSSIP_FILE_DEBUG,
569 "%s(%pU): BEFORE wait_for_io: offset is %d\n",
570 __func__,
571 handle,
572 (int)*offset);
573
574 ret = wait_for_direct_io(type, inode, offset, iter,
575 each_count, 0, NULL, NULL, file);
576 gossip_debug(GOSSIP_FILE_DEBUG,
577 "%s(%pU): return from wait_for_io:%d\n",
578 __func__,
579 handle,
580 (int)ret);
581
582 if (ret < 0)
583 goto out;
584
585 *offset += ret;
586 total_count += ret;
587 amt_complete = ret;
588
589 gossip_debug(GOSSIP_FILE_DEBUG,
590 "%s(%pU): AFTER wait_for_io: offset is %d\n",
591 __func__,
592 handle,
593 (int)*offset);
594
595 /*
596 * if we got a short I/O operations,
597 * fall out and return what we got so far
598 */
599 if (amt_complete < each_count)
600 break;
601 } /*end while */
602
603out:
604 if (total_count > 0)
605 ret = total_count;
606 if (ret > 0) {
607 if (type == ORANGEFS_IO_READ) {
608 file_accessed(file);
609 } else {
610 file_update_time(file);
611 if (*offset > i_size_read(inode))
612 i_size_write(inode, *offset);
613 }
614 }
615
616 gossip_debug(GOSSIP_FILE_DEBUG,
617 "%s(%pU): Value(%d) returned.\n",
618 __func__,
619 handle,
620 (int)ret);
621
622 return ret;
623}
624
625/** ORANGEFS2 implementation of address space operations */
626static const struct address_space_operations orangefs_address_operations = {
627 .writepage = orangefs_writepage,
628 .readahead = orangefs_readahead,
629 .read_folio = orangefs_read_folio,
630 .writepages = orangefs_writepages,
631 .dirty_folio = filemap_dirty_folio,
632 .write_begin = orangefs_write_begin,
633 .write_end = orangefs_write_end,
634 .invalidate_folio = orangefs_invalidate_folio,
635 .release_folio = orangefs_release_folio,
636 .free_folio = orangefs_free_folio,
637 .launder_folio = orangefs_launder_folio,
638 .direct_IO = orangefs_direct_IO,
639};
640
641vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
642{
643 struct folio *folio = page_folio(vmf->page);
644 struct inode *inode = file_inode(vmf->vma->vm_file);
645 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
646 unsigned long *bitlock = &orangefs_inode->bitlock;
647 vm_fault_t ret;
648 struct orangefs_write_range *wr;
649
650 sb_start_pagefault(inode->i_sb);
651
652 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
653 ret = VM_FAULT_RETRY;
654 goto out;
655 }
656
657 folio_lock(folio);
658 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
659 /*
660 * Should be impossible. If it happens, launder the folio
661 * since we don't know what's dirty. This will WARN in
662 * orangefs_writepage_locked.
663 */
664 if (orangefs_launder_folio(folio)) {
665 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
666 goto out;
667 }
668 }
669 if (folio_test_private(folio)) {
670 wr = folio_get_private(folio);
671 if (uid_eq(wr->uid, current_fsuid()) &&
672 gid_eq(wr->gid, current_fsgid())) {
673 wr->pos = page_offset(vmf->page);
674 wr->len = PAGE_SIZE;
675 goto okay;
676 } else {
677 if (orangefs_launder_folio(folio)) {
678 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
679 goto out;
680 }
681 }
682 }
683 wr = kmalloc(sizeof *wr, GFP_KERNEL);
684 if (!wr) {
685 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
686 goto out;
687 }
688 wr->pos = page_offset(vmf->page);
689 wr->len = PAGE_SIZE;
690 wr->uid = current_fsuid();
691 wr->gid = current_fsgid();
692 folio_attach_private(folio, wr);
693okay:
694
695 file_update_time(vmf->vma->vm_file);
696 if (folio->mapping != inode->i_mapping) {
697 folio_unlock(folio);
698 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
699 goto out;
700 }
701
702 /*
703 * We mark the folio dirty already here so that when freeze is in
704 * progress, we are guaranteed that writeback during freezing will
705 * see the dirty folio and writeprotect it again.
706 */
707 folio_mark_dirty(folio);
708 folio_wait_stable(folio);
709 ret = VM_FAULT_LOCKED;
710out:
711 sb_end_pagefault(inode->i_sb);
712 return ret;
713}
714
715static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
716{
717 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
718 struct orangefs_kernel_op_s *new_op;
719 loff_t orig_size;
720 int ret = -EINVAL;
721
722 gossip_debug(GOSSIP_INODE_DEBUG,
723 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
724 __func__,
725 get_khandle_from_ino(inode),
726 &orangefs_inode->refn.khandle,
727 orangefs_inode->refn.fs_id,
728 iattr->ia_size);
729
730 /* Ensure that we have a up to date size, so we know if it changed. */
731 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
732 if (ret == -ESTALE)
733 ret = -EIO;
734 if (ret) {
735 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
736 __func__, ret);
737 return ret;
738 }
739 orig_size = i_size_read(inode);
740
741 /* This is truncate_setsize in a different order. */
742 truncate_pagecache(inode, iattr->ia_size);
743 i_size_write(inode, iattr->ia_size);
744 if (iattr->ia_size > orig_size)
745 pagecache_isize_extended(inode, orig_size, iattr->ia_size);
746
747 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
748 if (!new_op)
749 return -ENOMEM;
750
751 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
752 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
753
754 ret = service_operation(new_op,
755 __func__,
756 get_interruptible_flag(inode));
757
758 /*
759 * the truncate has no downcall members to retrieve, but
760 * the status value tells us if it went through ok or not
761 */
762 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
763
764 op_release(new_op);
765
766 if (ret != 0)
767 return ret;
768
769 if (orig_size != i_size_read(inode))
770 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
771
772 return ret;
773}
774
775int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
776{
777 int ret;
778
779 if (iattr->ia_valid & ATTR_MODE) {
780 if (iattr->ia_mode & (S_ISVTX)) {
781 if (is_root_handle(inode)) {
782 /*
783 * allow sticky bit to be set on root (since
784 * it shows up that way by default anyhow),
785 * but don't show it to the server
786 */
787 iattr->ia_mode -= S_ISVTX;
788 } else {
789 gossip_debug(GOSSIP_UTILS_DEBUG,
790 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
791 ret = -EINVAL;
792 goto out;
793 }
794 }
795 if (iattr->ia_mode & (S_ISUID)) {
796 gossip_debug(GOSSIP_UTILS_DEBUG,
797 "Attempting to set setuid bit (not supported); returning EINVAL.\n");
798 ret = -EINVAL;
799 goto out;
800 }
801 }
802
803 if (iattr->ia_valid & ATTR_SIZE) {
804 ret = orangefs_setattr_size(inode, iattr);
805 if (ret)
806 goto out;
807 }
808
809again:
810 spin_lock(&inode->i_lock);
811 if (ORANGEFS_I(inode)->attr_valid) {
812 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
813 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
814 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
815 } else {
816 spin_unlock(&inode->i_lock);
817 write_inode_now(inode, 1);
818 goto again;
819 }
820 } else {
821 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
822 ORANGEFS_I(inode)->attr_uid = current_fsuid();
823 ORANGEFS_I(inode)->attr_gid = current_fsgid();
824 }
825 setattr_copy(&init_user_ns, inode, iattr);
826 spin_unlock(&inode->i_lock);
827 mark_inode_dirty(inode);
828
829 ret = 0;
830out:
831 return ret;
832}
833
834int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr)
835{
836 int ret;
837 struct inode *inode = d_inode(dentry);
838
839 ret = __orangefs_setattr(inode, iattr);
840 /* change mode on a file that has ACLs */
841 if (!ret && (iattr->ia_valid & ATTR_MODE))
842 ret = posix_acl_chmod(&init_user_ns, dentry, inode->i_mode);
843 return ret;
844}
845
846/*
847 * Change attributes of an object referenced by dentry.
848 */
849int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
850 struct iattr *iattr)
851{
852 int ret;
853 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
854 dentry);
855 ret = setattr_prepare(&init_user_ns, dentry, iattr);
856 if (ret)
857 goto out;
858 ret = __orangefs_setattr_mode(dentry, iattr);
859 sync_inode_metadata(d_inode(dentry), 1);
860out:
861 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
862 ret);
863 return ret;
864}
865
866/*
867 * Obtain attributes of an object given a dentry
868 */
869int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
870 struct kstat *stat, u32 request_mask, unsigned int flags)
871{
872 int ret;
873 struct inode *inode = path->dentry->d_inode;
874
875 gossip_debug(GOSSIP_INODE_DEBUG,
876 "orangefs_getattr: called on %pd mask %u\n",
877 path->dentry, request_mask);
878
879 ret = orangefs_inode_getattr(inode,
880 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
881 if (ret == 0) {
882 generic_fillattr(&init_user_ns, inode, stat);
883
884 /* override block size reported to stat */
885 if (!(request_mask & STATX_SIZE))
886 stat->result_mask &= ~STATX_SIZE;
887
888 generic_fill_statx_attr(inode, stat);
889 }
890 return ret;
891}
892
893int orangefs_permission(struct user_namespace *mnt_userns,
894 struct inode *inode, int mask)
895{
896 int ret;
897
898 if (mask & MAY_NOT_BLOCK)
899 return -ECHILD;
900
901 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
902
903 /* Make sure the permission (and other common attrs) are up to date. */
904 ret = orangefs_inode_getattr(inode, 0);
905 if (ret < 0)
906 return ret;
907
908 return generic_permission(&init_user_ns, inode, mask);
909}
910
911int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
912{
913 struct iattr iattr;
914 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
915 get_khandle_from_ino(inode));
916 generic_update_time(inode, time, flags);
917 memset(&iattr, 0, sizeof iattr);
918 if (flags & S_ATIME)
919 iattr.ia_valid |= ATTR_ATIME;
920 if (flags & S_CTIME)
921 iattr.ia_valid |= ATTR_CTIME;
922 if (flags & S_MTIME)
923 iattr.ia_valid |= ATTR_MTIME;
924 return __orangefs_setattr(inode, &iattr);
925}
926
927static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
928{
929 u64 val = 0;
930 int ret;
931
932 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
933 dentry);
934
935 ret = orangefs_inode_getxattr(d_inode(dentry),
936 "user.pvfs2.meta_hint",
937 &val, sizeof(val));
938 if (ret < 0 && ret != -ENODATA)
939 return ret;
940
941 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
942
943 fileattr_fill_flags(fa, val);
944 return 0;
945}
946
947static int orangefs_fileattr_set(struct user_namespace *mnt_userns,
948 struct dentry *dentry, struct fileattr *fa)
949{
950 u64 val = 0;
951
952 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
953 dentry);
954 /*
955 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
956 * turned on for a file. The user is not allowed to turn on this bit,
957 * but the bit is present if the user first gets the flags and then
958 * updates the flags with some new settings. So, we ignore it in the
959 * following edit. bligon.
960 */
961 if (fileattr_has_fsx(fa) ||
962 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
963 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
964 __func__);
965 return -EOPNOTSUPP;
966 }
967 val = fa->flags;
968 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
969 return orangefs_inode_setxattr(d_inode(dentry),
970 "user.pvfs2.meta_hint",
971 &val, sizeof(val), 0);
972}
973
974/* ORANGEFS2 implementation of VFS inode operations for files */
975static const struct inode_operations orangefs_file_inode_operations = {
976 .get_inode_acl = orangefs_get_acl,
977 .set_acl = orangefs_set_acl,
978 .setattr = orangefs_setattr,
979 .getattr = orangefs_getattr,
980 .listxattr = orangefs_listxattr,
981 .permission = orangefs_permission,
982 .update_time = orangefs_update_time,
983 .fileattr_get = orangefs_fileattr_get,
984 .fileattr_set = orangefs_fileattr_set,
985};
986
987static int orangefs_init_iops(struct inode *inode)
988{
989 inode->i_mapping->a_ops = &orangefs_address_operations;
990
991 switch (inode->i_mode & S_IFMT) {
992 case S_IFREG:
993 inode->i_op = &orangefs_file_inode_operations;
994 inode->i_fop = &orangefs_file_operations;
995 break;
996 case S_IFLNK:
997 inode->i_op = &orangefs_symlink_inode_operations;
998 break;
999 case S_IFDIR:
1000 inode->i_op = &orangefs_dir_inode_operations;
1001 inode->i_fop = &orangefs_dir_operations;
1002 break;
1003 default:
1004 gossip_debug(GOSSIP_INODE_DEBUG,
1005 "%s: unsupported mode\n",
1006 __func__);
1007 return -EINVAL;
1008 }
1009
1010 return 0;
1011}
1012
1013/*
1014 * Given an ORANGEFS object identifier (fsid, handle), convert it into
1015 * a ino_t type that will be used as a hash-index from where the handle will
1016 * be searched for in the VFS hash table of inodes.
1017 */
1018static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
1019{
1020 if (!ref)
1021 return 0;
1022 return orangefs_khandle_to_ino(&(ref->khandle));
1023}
1024
1025/*
1026 * Called to set up an inode from iget5_locked.
1027 */
1028static int orangefs_set_inode(struct inode *inode, void *data)
1029{
1030 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1031 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
1032 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
1033 ORANGEFS_I(inode)->attr_valid = 0;
1034 hash_init(ORANGEFS_I(inode)->xattr_cache);
1035 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
1036 ORANGEFS_I(inode)->bitlock = 0;
1037 return 0;
1038}
1039
1040/*
1041 * Called to determine if handles match.
1042 */
1043static int orangefs_test_inode(struct inode *inode, void *data)
1044{
1045 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1046 struct orangefs_inode_s *orangefs_inode = NULL;
1047
1048 orangefs_inode = ORANGEFS_I(inode);
1049 /* test handles and fs_ids... */
1050 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
1051 &(ref->khandle)) &&
1052 orangefs_inode->refn.fs_id == ref->fs_id);
1053}
1054
1055/*
1056 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1057 * file handle.
1058 *
1059 * @sb: the file system super block instance.
1060 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1061 */
1062struct inode *orangefs_iget(struct super_block *sb,
1063 struct orangefs_object_kref *ref)
1064{
1065 struct inode *inode = NULL;
1066 unsigned long hash;
1067 int error;
1068
1069 hash = orangefs_handle_hash(ref);
1070 inode = iget5_locked(sb,
1071 hash,
1072 orangefs_test_inode,
1073 orangefs_set_inode,
1074 ref);
1075
1076 if (!inode)
1077 return ERR_PTR(-ENOMEM);
1078
1079 if (!(inode->i_state & I_NEW))
1080 return inode;
1081
1082 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1083 if (error) {
1084 iget_failed(inode);
1085 return ERR_PTR(error);
1086 }
1087
1088 inode->i_ino = hash; /* needed for stat etc */
1089 orangefs_init_iops(inode);
1090 unlock_new_inode(inode);
1091
1092 gossip_debug(GOSSIP_INODE_DEBUG,
1093 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
1094 &ref->khandle,
1095 ref->fs_id,
1096 hash,
1097 inode->i_ino);
1098
1099 return inode;
1100}
1101
1102/*
1103 * Allocate an inode for a newly created file and insert it into the inode hash.
1104 */
1105struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1106 umode_t mode, dev_t dev, struct orangefs_object_kref *ref)
1107{
1108 struct posix_acl *acl = NULL, *default_acl = NULL;
1109 unsigned long hash = orangefs_handle_hash(ref);
1110 struct inode *inode;
1111 int error;
1112
1113 gossip_debug(GOSSIP_INODE_DEBUG,
1114 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1115 __func__,
1116 sb,
1117 MAJOR(dev),
1118 MINOR(dev),
1119 mode);
1120
1121 inode = new_inode(sb);
1122 if (!inode)
1123 return ERR_PTR(-ENOMEM);
1124
1125 error = posix_acl_create(dir, &mode, &default_acl, &acl);
1126 if (error)
1127 goto out_iput;
1128
1129 orangefs_set_inode(inode, ref);
1130 inode->i_ino = hash; /* needed for stat etc */
1131
1132 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1133 if (error)
1134 goto out_iput;
1135
1136 orangefs_init_iops(inode);
1137 inode->i_rdev = dev;
1138
1139 if (default_acl) {
1140 error = __orangefs_set_acl(inode, default_acl,
1141 ACL_TYPE_DEFAULT);
1142 if (error)
1143 goto out_iput;
1144 }
1145
1146 if (acl) {
1147 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
1148 if (error)
1149 goto out_iput;
1150 }
1151
1152 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
1153 if (error < 0)
1154 goto out_iput;
1155
1156 gossip_debug(GOSSIP_INODE_DEBUG,
1157 "Initializing ACL's for inode %pU\n",
1158 get_khandle_from_ino(inode));
1159 if (mode != inode->i_mode) {
1160 struct iattr iattr = {
1161 .ia_mode = mode,
1162 .ia_valid = ATTR_MODE,
1163 };
1164 inode->i_mode = mode;
1165 __orangefs_setattr(inode, &iattr);
1166 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
1167 }
1168 posix_acl_release(acl);
1169 posix_acl_release(default_acl);
1170 return inode;
1171
1172out_iput:
1173 iput(inode);
1174 posix_acl_release(acl);
1175 posix_acl_release(default_acl);
1176 return ERR_PTR(error);
1177}