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
orangefs_writepage_locked(struct folio * folio,struct writeback_control * wbc)19 static int orangefs_writepage_locked(struct folio *folio,
20 struct writeback_control *wbc)
21 {
22 struct inode *inode = folio->mapping->host;
23 struct orangefs_write_range *wr = NULL;
24 struct iov_iter iter;
25 struct bio_vec bv;
26 size_t wlen;
27 ssize_t ret;
28 loff_t len, off;
29
30 folio_start_writeback(folio);
31
32 len = i_size_read(inode);
33 if (folio->private) {
34 wr = folio->private;
35 off = wr->pos;
36 if ((off + wr->len > len) && (off <= len))
37 wlen = len - off;
38 else
39 wlen = wr->len;
40 if (wlen == 0)
41 wlen = wr->len;
42 } else {
43 WARN_ON(1);
44 off = folio_pos(folio);
45 wlen = folio_size(folio);
46
47 if (wlen > len - off)
48 wlen = len - off;
49 }
50
51 WARN_ON(wlen == 0);
52 bvec_set_folio(&bv, folio, wlen, offset_in_folio(folio, off));
53 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
54
55 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
56 len, wr, NULL, NULL);
57 if (ret < 0) {
58 mapping_set_error(folio->mapping, ret);
59 } else {
60 ret = 0;
61 }
62 kfree(folio_detach_private(folio));
63 return ret;
64 }
65
66 struct orangefs_writepages {
67 loff_t off;
68 size_t len;
69 kuid_t uid;
70 kgid_t gid;
71 int maxpages;
72 int nfolios;
73 struct address_space *mapping;
74 struct folio **folios;
75 struct bio_vec *bv;
76 };
77
orangefs_writepages_work(struct orangefs_writepages * ow,struct writeback_control * wbc)78 static int orangefs_writepages_work(struct orangefs_writepages *ow,
79 struct writeback_control *wbc)
80 {
81 struct inode *inode = ow->mapping->host;
82 struct orangefs_write_range *wrp, wr;
83 struct iov_iter iter;
84 ssize_t ret;
85 size_t start;
86 loff_t len, off;
87 int i;
88
89 len = i_size_read(inode);
90
91 start = offset_in_folio(ow->folios[0], ow->off);
92 for (i = 0; i < ow->nfolios; i++) {
93 folio_start_writeback(ow->folios[i]);
94 bvec_set_folio(&ow->bv[i], ow->folios[i],
95 folio_size(ow->folios[i]) - start, start);
96 start = 0;
97 }
98 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->nfolios, ow->len);
99
100 WARN_ON(ow->off >= len);
101 if (ow->off + ow->len > len)
102 ow->len = len - ow->off;
103
104 off = ow->off;
105 wr.uid = ow->uid;
106 wr.gid = ow->gid;
107 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
108 0, &wr, NULL, NULL);
109 if (ret < 0)
110 mapping_set_error(ow->mapping, ret);
111 else
112 ret = 0;
113
114 for (i = 0; i < ow->nfolios; i++) {
115 wrp = folio_detach_private(ow->folios[i]);
116 kfree(wrp);
117 folio_end_writeback(ow->folios[i]);
118 folio_unlock(ow->folios[i]);
119 }
120
121 return ret;
122 }
123
orangefs_writepages_callback(struct folio * folio,struct writeback_control * wbc,struct orangefs_writepages * ow)124 static int orangefs_writepages_callback(struct folio *folio,
125 struct writeback_control *wbc, struct orangefs_writepages *ow)
126 {
127 struct orangefs_write_range *wr = folio->private;
128 int ret;
129
130 if (!wr) {
131 folio_unlock(folio);
132 /* It's not private so there's nothing to write, right? */
133 printk("writepages_callback not private!\n");
134 BUG();
135 return 0;
136 }
137
138 ret = -1;
139 if (ow->nfolios == 0) {
140 ow->off = wr->pos;
141 ow->len = wr->len;
142 ow->uid = wr->uid;
143 ow->gid = wr->gid;
144 ow->folios[ow->nfolios++] = folio;
145 ret = 0;
146 goto done;
147 }
148 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
149 orangefs_writepages_work(ow, wbc);
150 ow->nfolios = 0;
151 ret = -1;
152 goto done;
153 }
154 if (ow->off + ow->len == wr->pos) {
155 ow->len += wr->len;
156 ow->folios[ow->nfolios++] = folio;
157 ret = 0;
158 goto done;
159 }
160 done:
161 if (ret == -1) {
162 if (ow->nfolios) {
163 orangefs_writepages_work(ow, wbc);
164 ow->nfolios = 0;
165 }
166 ret = orangefs_writepage_locked(folio, wbc);
167 mapping_set_error(folio->mapping, ret);
168 folio_unlock(folio);
169 folio_end_writeback(folio);
170 } else {
171 if (ow->nfolios == ow->maxpages) {
172 orangefs_writepages_work(ow, wbc);
173 ow->nfolios = 0;
174 }
175 }
176 return ret;
177 }
178
orangefs_writepages(struct address_space * mapping,struct writeback_control * wbc)179 static int orangefs_writepages(struct address_space *mapping,
180 struct writeback_control *wbc)
181 {
182 struct orangefs_writepages *ow;
183 struct blk_plug plug;
184 int error;
185 struct folio *folio = NULL;
186
187 ow = kzalloc_obj(struct orangefs_writepages);
188 if (!ow)
189 return -ENOMEM;
190 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
191 ow->folios = kzalloc_objs(struct folio *, ow->maxpages);
192 if (!ow->folios) {
193 kfree(ow);
194 return -ENOMEM;
195 }
196 ow->bv = kzalloc_objs(struct bio_vec, ow->maxpages);
197 if (!ow->bv) {
198 kfree(ow->folios);
199 kfree(ow);
200 return -ENOMEM;
201 }
202 ow->mapping = mapping;
203 blk_start_plug(&plug);
204 while ((folio = writeback_iter(mapping, wbc, folio, &error)))
205 error = orangefs_writepages_callback(folio, wbc, ow);
206 if (ow->nfolios)
207 error = orangefs_writepages_work(ow, wbc);
208 blk_finish_plug(&plug);
209 kfree(ow->folios);
210 kfree(ow->bv);
211 kfree(ow);
212 return error;
213 }
214
215 static int orangefs_launder_folio(struct folio *);
216
orangefs_readahead(struct readahead_control * rac)217 static void orangefs_readahead(struct readahead_control *rac)
218 {
219 loff_t offset;
220 struct iov_iter iter;
221 struct inode *inode = rac->mapping->host;
222 struct xarray *i_pages;
223 struct folio *folio;
224 loff_t new_start = readahead_pos(rac);
225 int ret;
226 size_t new_len = 0;
227 size_t this_size;
228 size_t remaining;
229
230 loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
231 loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
232
233 if (pages_remaining >= 1024)
234 new_len = 4194304;
235 else if (pages_remaining > readahead_count(rac))
236 new_len = bytes_remaining;
237
238 if (new_len)
239 readahead_expand(rac, new_start, new_len);
240
241 offset = readahead_pos(rac);
242 i_pages = &rac->mapping->i_pages;
243
244 iov_iter_xarray(&iter, ITER_DEST, i_pages,
245 offset, readahead_length(rac));
246
247 remaining = readahead_length(rac);
248 while (remaining) {
249 if (remaining > 4194304)
250 this_size = 4194304;
251 else
252 this_size = remaining;
253
254 /* read in the pages. */
255 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
256 &offset, &iter, this_size,
257 inode->i_size, NULL, NULL, rac->file)) < 0) {
258 gossip_debug(GOSSIP_FILE_DEBUG,
259 "%s: wait_for_direct_io failed. :%d: \n",
260 __func__, ret);
261 goto cleanup;
262 } else {
263 ret = 0;
264 }
265
266 remaining -= this_size;
267 offset += this_size;
268 }
269
270 cleanup:
271 /* clean up. */
272 while ((folio = readahead_folio(rac))) {
273 if (!ret)
274 folio_mark_uptodate(folio);
275 folio_unlock(folio);
276 }
277 }
278
orangefs_read_folio(struct file * file,struct folio * folio)279 static int orangefs_read_folio(struct file *file, struct folio *folio)
280 {
281 struct inode *inode = folio->mapping->host;
282 struct iov_iter iter;
283 struct bio_vec bv;
284 ssize_t ret;
285 loff_t off; /* offset of this folio in the file */
286
287 if (folio_test_dirty(folio))
288 orangefs_launder_folio(folio);
289
290 off = folio_pos(folio);
291 bvec_set_folio(&bv, folio, folio_size(folio), 0);
292 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
293
294 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
295 folio_size(folio), inode->i_size, NULL, NULL, file);
296 /* this will only zero remaining unread portions of the folio data */
297 iov_iter_zero(~0U, &iter);
298 /* takes care of potential aliasing */
299 flush_dcache_folio(folio);
300 if (ret > 0)
301 ret = 0;
302 folio_end_read(folio, ret == 0);
303 return ret;
304 }
305
orangefs_write_begin(const struct kiocb * iocb,struct address_space * mapping,loff_t pos,unsigned len,struct folio ** foliop,void ** fsdata)306 static int orangefs_write_begin(const struct kiocb *iocb,
307 struct address_space *mapping, loff_t pos,
308 unsigned len, struct folio **foliop,
309 void **fsdata)
310 {
311 struct orangefs_write_range *wr;
312 struct folio *folio;
313 int ret;
314
315 folio = __filemap_get_folio(mapping, pos / PAGE_SIZE, FGP_WRITEBEGIN,
316 mapping_gfp_mask(mapping));
317 if (IS_ERR(folio))
318 return PTR_ERR(folio);
319
320 *foliop = folio;
321
322 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
323 /*
324 * Should be impossible. If it happens, launder the page
325 * since we don't know what's dirty. This will WARN in
326 * orangefs_writepage_locked.
327 */
328 ret = orangefs_launder_folio(folio);
329 if (ret)
330 return ret;
331 }
332 if (folio_test_private(folio)) {
333 struct orangefs_write_range *wr;
334 wr = folio_get_private(folio);
335 if (wr->pos + wr->len == pos &&
336 uid_eq(wr->uid, current_fsuid()) &&
337 gid_eq(wr->gid, current_fsgid())) {
338 wr->len += len;
339 goto okay;
340 } else {
341 wr->pos = pos;
342 wr->len = len;
343 ret = orangefs_launder_folio(folio);
344 if (ret)
345 return ret;
346 }
347 }
348
349 wr = kmalloc_obj(*wr);
350 if (!wr)
351 return -ENOMEM;
352
353 wr->pos = pos;
354 wr->len = len;
355 wr->uid = current_fsuid();
356 wr->gid = current_fsgid();
357 folio_attach_private(folio, wr);
358 okay:
359 return 0;
360 }
361
orangefs_write_end(const struct kiocb * iocb,struct address_space * mapping,loff_t pos,unsigned len,unsigned copied,struct folio * folio,void * fsdata)362 static int orangefs_write_end(const struct kiocb *iocb,
363 struct address_space *mapping,
364 loff_t pos, unsigned len, unsigned copied,
365 struct folio *folio, 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(iocb->ki_filp));
396 return copied;
397 }
398
orangefs_invalidate_folio(struct folio * folio,size_t offset,size_t length)399 static 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
orangefs_release_folio(struct folio * folio,gfp_t foo)468 static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
469 {
470 return !folio_test_private(folio);
471 }
472
orangefs_free_folio(struct folio * folio)473 static void orangefs_free_folio(struct folio *folio)
474 {
475 kfree(folio_detach_private(folio));
476 }
477
orangefs_launder_folio(struct folio * folio)478 static 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, &wbc);
488 folio_end_writeback(folio);
489 }
490 return r;
491 }
492
orangefs_direct_IO(struct kiocb * iocb,struct iov_iter * iter)493 static 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
585 out:
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 */
608 static const struct address_space_operations orangefs_address_operations = {
609 .readahead = orangefs_readahead,
610 .read_folio = orangefs_read_folio,
611 .writepages = orangefs_writepages,
612 .dirty_folio = filemap_dirty_folio,
613 .write_begin = orangefs_write_begin,
614 .write_end = orangefs_write_end,
615 .invalidate_folio = orangefs_invalidate_folio,
616 .release_folio = orangefs_release_folio,
617 .free_folio = orangefs_free_folio,
618 .migrate_folio = filemap_migrate_folio,
619 .launder_folio = orangefs_launder_folio,
620 .direct_IO = orangefs_direct_IO,
621 };
622
orangefs_page_mkwrite(struct vm_fault * vmf)623 vm_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 = folio_pos(folio);
656 wr->len = folio_size(folio);
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_obj(*wr);
666 if (!wr) {
667 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
668 goto out;
669 }
670 wr->pos = folio_pos(folio);
671 wr->len = folio_size(folio);
672 wr->uid = current_fsuid();
673 wr->gid = current_fsgid();
674 folio_attach_private(folio, wr);
675 okay:
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;
692 out:
693 sb_end_pagefault(inode->i_sb);
694 return ret;
695 }
696
orangefs_setattr_size(struct inode * inode,struct iattr * iattr)697 static 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
__orangefs_setattr(struct inode * inode,struct iattr * iattr)757 int __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
791 again:
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;
812 out:
813 return ret;
814 }
815
__orangefs_setattr_mode(struct dentry * dentry,struct iattr * iattr)816 int __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 */
orangefs_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * iattr)831 int 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);
842 out:
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 */
orangefs_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int flags)851 int 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
orangefs_permission(struct mnt_idmap * idmap,struct inode * inode,int mask)875 int 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
orangefs_update_time(struct inode * inode,enum fs_update_time type,unsigned int flags)893 int orangefs_update_time(struct inode *inode, enum fs_update_time type,
894 unsigned int flags)
895 {
896 struct iattr iattr = { };
897 int dirty;
898
899 if (flags & IOCB_NOWAIT)
900 return -EAGAIN;
901
902 switch (type) {
903 case FS_UPD_ATIME:
904 iattr.ia_valid = ATTR_ATIME;
905 break;
906 case FS_UPD_CMTIME:
907 iattr.ia_valid = ATTR_CTIME | ATTR_MTIME;
908 break;
909 }
910
911 dirty = inode_update_time(inode, type, flags);
912 if (dirty <= 0)
913 return dirty;
914 return __orangefs_setattr(inode, &iattr);
915 }
916
orangefs_fileattr_get(struct dentry * dentry,struct file_kattr * fa)917 static int orangefs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
918 {
919 u64 val = 0;
920 int ret;
921
922 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
923 dentry);
924
925 ret = orangefs_inode_getxattr(d_inode(dentry),
926 "user.pvfs2.meta_hint",
927 &val, sizeof(val));
928 if (ret < 0 && ret != -ENODATA)
929 return ret;
930
931 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
932
933 fileattr_fill_flags(fa, val);
934 return 0;
935 }
936
orangefs_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct file_kattr * fa)937 static int orangefs_fileattr_set(struct mnt_idmap *idmap,
938 struct dentry *dentry, struct file_kattr *fa)
939 {
940 u64 val = 0;
941
942 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
943 dentry);
944 /*
945 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
946 * turned on for a file. The user is not allowed to turn on this bit,
947 * but the bit is present if the user first gets the flags and then
948 * updates the flags with some new settings. So, we ignore it in the
949 * following edit. bligon.
950 */
951 if (fileattr_has_fsx(fa) ||
952 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
953 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
954 __func__);
955 return -EOPNOTSUPP;
956 }
957 val = fa->flags;
958 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
959 return orangefs_inode_setxattr(d_inode(dentry),
960 "user.pvfs2.meta_hint",
961 &val, sizeof(val), 0);
962 }
963
964 /* ORANGEFS2 implementation of VFS inode operations for files */
965 static const struct inode_operations orangefs_file_inode_operations = {
966 .get_inode_acl = orangefs_get_acl,
967 .set_acl = orangefs_set_acl,
968 .setattr = orangefs_setattr,
969 .getattr = orangefs_getattr,
970 .listxattr = orangefs_listxattr,
971 .permission = orangefs_permission,
972 .update_time = orangefs_update_time,
973 .fileattr_get = orangefs_fileattr_get,
974 .fileattr_set = orangefs_fileattr_set,
975 };
976
orangefs_init_iops(struct inode * inode)977 static int orangefs_init_iops(struct inode *inode)
978 {
979 inode->i_mapping->a_ops = &orangefs_address_operations;
980
981 switch (inode->i_mode & S_IFMT) {
982 case S_IFREG:
983 inode->i_op = &orangefs_file_inode_operations;
984 inode->i_fop = &orangefs_file_operations;
985 break;
986 case S_IFLNK:
987 inode->i_op = &orangefs_symlink_inode_operations;
988 break;
989 case S_IFDIR:
990 inode->i_op = &orangefs_dir_inode_operations;
991 inode->i_fop = &orangefs_dir_operations;
992 break;
993 default:
994 gossip_debug(GOSSIP_INODE_DEBUG,
995 "%s: unsupported mode\n",
996 __func__);
997 return -EINVAL;
998 }
999
1000 return 0;
1001 }
1002
1003 /*
1004 * Given an ORANGEFS object identifier (fsid, handle), convert it into
1005 * a ino_t type that will be used as a hash-index from where the handle will
1006 * be searched for in the VFS hash table of inodes.
1007 */
orangefs_handle_hash(struct orangefs_object_kref * ref)1008 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
1009 {
1010 if (!ref)
1011 return 0;
1012 return orangefs_khandle_to_ino(&(ref->khandle));
1013 }
1014
1015 /*
1016 * Called to set up an inode from iget5_locked.
1017 */
orangefs_set_inode(struct inode * inode,void * data)1018 static int orangefs_set_inode(struct inode *inode, void *data)
1019 {
1020 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1021 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
1022 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
1023 ORANGEFS_I(inode)->attr_valid = 0;
1024 hash_init(ORANGEFS_I(inode)->xattr_cache);
1025 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
1026 ORANGEFS_I(inode)->bitlock = 0;
1027 return 0;
1028 }
1029
1030 /*
1031 * Called to determine if handles match.
1032 */
orangefs_test_inode(struct inode * inode,void * data)1033 static int orangefs_test_inode(struct inode *inode, void *data)
1034 {
1035 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1036 struct orangefs_inode_s *orangefs_inode = NULL;
1037
1038 orangefs_inode = ORANGEFS_I(inode);
1039 /* test handles and fs_ids... */
1040 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
1041 &(ref->khandle)) &&
1042 orangefs_inode->refn.fs_id == ref->fs_id);
1043 }
1044
1045 /*
1046 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1047 * file handle.
1048 *
1049 * @sb: the file system super block instance.
1050 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1051 */
orangefs_iget(struct super_block * sb,struct orangefs_object_kref * ref)1052 struct inode *orangefs_iget(struct super_block *sb,
1053 struct orangefs_object_kref *ref)
1054 {
1055 struct inode *inode = NULL;
1056 unsigned long hash;
1057 int error;
1058
1059 hash = orangefs_handle_hash(ref);
1060 inode = iget5_locked(sb,
1061 hash,
1062 orangefs_test_inode,
1063 orangefs_set_inode,
1064 ref);
1065
1066 if (!inode)
1067 return ERR_PTR(-ENOMEM);
1068
1069 if (!(inode_state_read_once(inode) & I_NEW))
1070 return inode;
1071
1072 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1073 if (error) {
1074 iget_failed(inode);
1075 return ERR_PTR(error);
1076 }
1077
1078 inode->i_ino = hash; /* needed for stat etc */
1079 orangefs_init_iops(inode);
1080 unlock_new_inode(inode);
1081
1082 gossip_debug(GOSSIP_INODE_DEBUG,
1083 "iget handle %pU, fsid %d hash %ld i_ino %llu\n",
1084 &ref->khandle,
1085 ref->fs_id,
1086 hash,
1087 inode->i_ino);
1088
1089 return inode;
1090 }
1091
1092 /*
1093 * Allocate an inode for a newly created file and insert it into the inode hash.
1094 */
orangefs_new_inode(struct super_block * sb,struct inode * dir,umode_t mode,dev_t dev,struct orangefs_object_kref * ref)1095 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1096 umode_t mode, dev_t dev, struct orangefs_object_kref *ref)
1097 {
1098 struct posix_acl *acl = NULL, *default_acl = NULL;
1099 unsigned long hash = orangefs_handle_hash(ref);
1100 struct inode *inode;
1101 int error;
1102
1103 gossip_debug(GOSSIP_INODE_DEBUG,
1104 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1105 __func__,
1106 sb,
1107 MAJOR(dev),
1108 MINOR(dev),
1109 mode);
1110
1111 inode = new_inode(sb);
1112 if (!inode)
1113 return ERR_PTR(-ENOMEM);
1114
1115 error = posix_acl_create(dir, &mode, &default_acl, &acl);
1116 if (error)
1117 goto out_iput;
1118
1119 orangefs_set_inode(inode, ref);
1120 inode->i_ino = hash; /* needed for stat etc */
1121
1122 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1123 if (error)
1124 goto out_iput;
1125
1126 orangefs_init_iops(inode);
1127 inode->i_rdev = dev;
1128
1129 if (default_acl) {
1130 error = __orangefs_set_acl(inode, default_acl,
1131 ACL_TYPE_DEFAULT);
1132 if (error)
1133 goto out_iput;
1134 }
1135
1136 if (acl) {
1137 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
1138 if (error)
1139 goto out_iput;
1140 }
1141
1142 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
1143 if (error < 0)
1144 goto out_iput;
1145
1146 gossip_debug(GOSSIP_INODE_DEBUG,
1147 "Initializing ACL's for inode %pU\n",
1148 get_khandle_from_ino(inode));
1149 if (mode != inode->i_mode) {
1150 struct iattr iattr = {
1151 .ia_mode = mode,
1152 .ia_valid = ATTR_MODE,
1153 };
1154 inode->i_mode = mode;
1155 __orangefs_setattr(inode, &iattr);
1156 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
1157 }
1158 posix_acl_release(acl);
1159 posix_acl_release(default_acl);
1160 return inode;
1161
1162 out_iput:
1163 iput(inode);
1164 posix_acl_release(acl);
1165 posix_acl_release(default_acl);
1166 return ERR_PTR(error);
1167 }
1168