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