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 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: &bv, folio, len: wlen, offset_in_folio(folio, off));
53 iov_iter_bvec(i: &iter, ITER_SOURCE, bvec: &bv, nr_segs: 1, count: 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(mapping: folio->mapping, error: ret);
59 } else {
60 ret = 0;
61 }
62 kfree(objp: folio_detach_private(folio));
63 return ret;
64}
65
66struct 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
78static 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(bv: &ow->bv[i], folio: ow->folios[i],
95 len: folio_size(folio: ow->folios[i]) - start, offset: start);
96 start = 0;
97 }
98 iov_iter_bvec(i: &iter, ITER_SOURCE, bvec: ow->bv, nr_segs: ow->nfolios, count: 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(mapping: ow->mapping, error: ret);
111 else
112 ret = 0;
113
114 for (i = 0; i < ow->nfolios; i++) {
115 wrp = folio_detach_private(folio: ow->folios[i]);
116 kfree(objp: wrp);
117 folio_end_writeback(folio: ow->folios[i]);
118 folio_unlock(folio: ow->folios[i]);
119 }
120
121 return ret;
122}
123
124static 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(left: ow->uid, right: wr->uid) || !gid_eq(left: ow->gid, right: 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 }
160done:
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(mapping: folio->mapping, error: 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
179static 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(objp: ow);
194 return -ENOMEM;
195 }
196 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
197 if (!ow->bv) {
198 kfree(objp: ow->folios);
199 kfree(objp: ow);
200 return -ENOMEM;
201 }
202 ow->mapping = mapping;
203 blk_start_plug(&plug);
204 while ((folio = writeback_iter(mapping, wbc, folio, error: &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(objp: ow->folios);
210 kfree(objp: ow->bv);
211 kfree(objp: ow);
212 return error;
213}
214
215static int orangefs_launder_folio(struct folio *);
216
217static 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(ractl: rac, new_start, new_len);
238
239 offset = readahead_pos(rac);
240 i_pages = &rac->mapping->i_pages;
241
242 iov_iter_xarray(i: &iter, ITER_DEST, xarray: i_pages, start: offset, count: 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(ractl: rac))) {
255 if (!ret)
256 folio_mark_uptodate(folio);
257 folio_unlock(folio);
258 }
259}
260
261static 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: &bv, folio, len: folio_size(folio), offset: 0);
274 iov_iter_bvec(i: &iter, ITER_DEST, bvec: &bv, nr_segs: 1, count: 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(bytes: ~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, success: ret == 0);
285 return ret;
286}
287
288static int orangefs_write_begin(struct file *file,
289 struct address_space *mapping, loff_t pos, unsigned len,
290 struct folio **foliop, void **fsdata)
291{
292 struct orangefs_write_range *wr;
293 struct folio *folio;
294 int ret;
295
296 folio = __filemap_get_folio(mapping, index: pos / PAGE_SIZE, FGP_WRITEBEGIN,
297 gfp: mapping_gfp_mask(mapping));
298 if (IS_ERR(ptr: folio))
299 return PTR_ERR(ptr: folio);
300
301 *foliop = folio;
302
303 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
304 /*
305 * Should be impossible. If it happens, launder the page
306 * since we don't know what's dirty. This will WARN in
307 * orangefs_writepage_locked.
308 */
309 ret = orangefs_launder_folio(folio);
310 if (ret)
311 return ret;
312 }
313 if (folio_test_private(folio)) {
314 struct orangefs_write_range *wr;
315 wr = folio_get_private(folio);
316 if (wr->pos + wr->len == pos &&
317 uid_eq(left: wr->uid, current_fsuid()) &&
318 gid_eq(left: wr->gid, current_fsgid())) {
319 wr->len += len;
320 goto okay;
321 } else {
322 wr->pos = pos;
323 wr->len = len;
324 ret = orangefs_launder_folio(folio);
325 if (ret)
326 return ret;
327 }
328 }
329
330 wr = kmalloc(sizeof *wr, GFP_KERNEL);
331 if (!wr)
332 return -ENOMEM;
333
334 wr->pos = pos;
335 wr->len = len;
336 wr->uid = current_fsuid();
337 wr->gid = current_fsgid();
338 folio_attach_private(folio, data: wr);
339okay:
340 return 0;
341}
342
343static int orangefs_write_end(struct file *file, struct address_space *mapping,
344 loff_t pos, unsigned len, unsigned copied, struct folio *folio,
345 void *fsdata)
346{
347 struct inode *inode = folio->mapping->host;
348 loff_t last_pos = pos + copied;
349
350 /*
351 * No need to use i_size_read() here, the i_size
352 * cannot change under us because we hold the i_mutex.
353 */
354 if (last_pos > inode->i_size)
355 i_size_write(inode, i_size: last_pos);
356
357 /* zero the stale part of the folio if we did a short copy */
358 if (!folio_test_uptodate(folio)) {
359 unsigned from = pos & (PAGE_SIZE - 1);
360 if (copied < len) {
361 folio_zero_range(folio, start: from + copied, length: len - copied);
362 }
363 /* Set fully written pages uptodate. */
364 if (pos == folio_pos(folio) &&
365 (len == PAGE_SIZE || pos + len == inode->i_size)) {
366 folio_zero_segment(folio, start: from + copied, PAGE_SIZE);
367 folio_mark_uptodate(folio);
368 }
369 }
370
371 folio_mark_dirty(folio);
372 folio_unlock(folio);
373 folio_put(folio);
374
375 mark_inode_dirty_sync(inode: file_inode(f: file));
376 return copied;
377}
378
379static void orangefs_invalidate_folio(struct folio *folio,
380 size_t offset, size_t length)
381{
382 struct orangefs_write_range *wr = folio_get_private(folio);
383
384 if (offset == 0 && length == PAGE_SIZE) {
385 kfree(objp: folio_detach_private(folio));
386 return;
387 /* write range entirely within invalidate range (or equal) */
388 } else if (folio_pos(folio) + offset <= wr->pos &&
389 wr->pos + wr->len <= folio_pos(folio) + offset + length) {
390 kfree(objp: folio_detach_private(folio));
391 /* XXX is this right? only caller in fs */
392 folio_cancel_dirty(folio);
393 return;
394 /* invalidate range chops off end of write range */
395 } else if (wr->pos < folio_pos(folio) + offset &&
396 wr->pos + wr->len <= folio_pos(folio) + offset + length &&
397 folio_pos(folio) + offset < wr->pos + wr->len) {
398 size_t x;
399 x = wr->pos + wr->len - (folio_pos(folio) + offset);
400 WARN_ON(x > wr->len);
401 wr->len -= x;
402 wr->uid = current_fsuid();
403 wr->gid = current_fsgid();
404 /* invalidate range chops off beginning of write range */
405 } else if (folio_pos(folio) + offset <= wr->pos &&
406 folio_pos(folio) + offset + length < wr->pos + wr->len &&
407 wr->pos < folio_pos(folio) + offset + length) {
408 size_t x;
409 x = folio_pos(folio) + offset + length - wr->pos;
410 WARN_ON(x > wr->len);
411 wr->pos += x;
412 wr->len -= x;
413 wr->uid = current_fsuid();
414 wr->gid = current_fsgid();
415 /* invalidate range entirely within write range (punch hole) */
416 } else if (wr->pos < folio_pos(folio) + offset &&
417 folio_pos(folio) + offset + length < wr->pos + wr->len) {
418 /* XXX what do we do here... should not WARN_ON */
419 WARN_ON(1);
420 /* punch hole */
421 /*
422 * should we just ignore this and write it out anyway?
423 * it hardly makes sense
424 */
425 return;
426 /* non-overlapping ranges */
427 } else {
428 /* WARN if they do overlap */
429 if (!((folio_pos(folio) + offset + length <= wr->pos) ^
430 (wr->pos + wr->len <= folio_pos(folio) + offset))) {
431 WARN_ON(1);
432 printk("invalidate range offset %llu length %zu\n",
433 folio_pos(folio) + offset, length);
434 printk("write range offset %llu length %zu\n",
435 wr->pos, wr->len);
436 }
437 return;
438 }
439
440 /*
441 * Above there are returns where wr is freed or where we WARN.
442 * Thus the following runs if wr was modified above.
443 */
444
445 orangefs_launder_folio(folio);
446}
447
448static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
449{
450 return !folio_test_private(folio);
451}
452
453static void orangefs_free_folio(struct folio *folio)
454{
455 kfree(objp: folio_detach_private(folio));
456}
457
458static int orangefs_launder_folio(struct folio *folio)
459{
460 int r = 0;
461 struct writeback_control wbc = {
462 .sync_mode = WB_SYNC_ALL,
463 .nr_to_write = 0,
464 };
465 folio_wait_writeback(folio);
466 if (folio_clear_dirty_for_io(folio)) {
467 r = orangefs_writepage_locked(folio, wbc: &wbc);
468 folio_end_writeback(folio);
469 }
470 return r;
471}
472
473static ssize_t orangefs_direct_IO(struct kiocb *iocb,
474 struct iov_iter *iter)
475{
476 /*
477 * Comment from original do_readv_writev:
478 * Common entry point for read/write/readv/writev
479 * This function will dispatch it to either the direct I/O
480 * or buffered I/O path depending on the mount options and/or
481 * augmented/extended metadata attached to the file.
482 * Note: File extended attributes override any mount options.
483 */
484 struct file *file = iocb->ki_filp;
485 loff_t pos = iocb->ki_pos;
486 enum ORANGEFS_io_type type = iov_iter_rw(i: iter) == WRITE ?
487 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
488 loff_t *offset = &pos;
489 struct inode *inode = file->f_mapping->host;
490 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
491 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
492 size_t count = iov_iter_count(i: iter);
493 ssize_t total_count = 0;
494 ssize_t ret = -EINVAL;
495
496 gossip_debug(GOSSIP_FILE_DEBUG,
497 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
498 __func__,
499 handle,
500 (int)count);
501
502 if (type == ORANGEFS_IO_WRITE) {
503 gossip_debug(GOSSIP_FILE_DEBUG,
504 "%s(%pU): proceeding with offset : %llu, "
505 "size %d\n",
506 __func__,
507 handle,
508 llu(*offset),
509 (int)count);
510 }
511
512 if (count == 0) {
513 ret = 0;
514 goto out;
515 }
516
517 while (iov_iter_count(i: iter)) {
518 size_t each_count = iov_iter_count(i: iter);
519 size_t amt_complete;
520
521 /* how much to transfer in this loop iteration */
522 if (each_count > orangefs_bufmap_size_query())
523 each_count = orangefs_bufmap_size_query();
524
525 gossip_debug(GOSSIP_FILE_DEBUG,
526 "%s(%pU): size of each_count(%d)\n",
527 __func__,
528 handle,
529 (int)each_count);
530 gossip_debug(GOSSIP_FILE_DEBUG,
531 "%s(%pU): BEFORE wait_for_io: offset is %d\n",
532 __func__,
533 handle,
534 (int)*offset);
535
536 ret = wait_for_direct_io(type, inode, offset, iter,
537 each_count, 0, NULL, NULL, file);
538 gossip_debug(GOSSIP_FILE_DEBUG,
539 "%s(%pU): return from wait_for_io:%d\n",
540 __func__,
541 handle,
542 (int)ret);
543
544 if (ret < 0)
545 goto out;
546
547 *offset += ret;
548 total_count += ret;
549 amt_complete = ret;
550
551 gossip_debug(GOSSIP_FILE_DEBUG,
552 "%s(%pU): AFTER wait_for_io: offset is %d\n",
553 __func__,
554 handle,
555 (int)*offset);
556
557 /*
558 * if we got a short I/O operations,
559 * fall out and return what we got so far
560 */
561 if (amt_complete < each_count)
562 break;
563 } /*end while */
564
565out:
566 if (total_count > 0)
567 ret = total_count;
568 if (ret > 0) {
569 if (type == ORANGEFS_IO_READ) {
570 file_accessed(file);
571 } else {
572 file_update_time(file);
573 if (*offset > i_size_read(inode))
574 i_size_write(inode, i_size: *offset);
575 }
576 }
577
578 gossip_debug(GOSSIP_FILE_DEBUG,
579 "%s(%pU): Value(%d) returned.\n",
580 __func__,
581 handle,
582 (int)ret);
583
584 return ret;
585}
586
587/** ORANGEFS2 implementation of address space operations */
588static const struct address_space_operations orangefs_address_operations = {
589 .readahead = orangefs_readahead,
590 .read_folio = orangefs_read_folio,
591 .writepages = orangefs_writepages,
592 .dirty_folio = filemap_dirty_folio,
593 .write_begin = orangefs_write_begin,
594 .write_end = orangefs_write_end,
595 .invalidate_folio = orangefs_invalidate_folio,
596 .release_folio = orangefs_release_folio,
597 .free_folio = orangefs_free_folio,
598 .migrate_folio = filemap_migrate_folio,
599 .launder_folio = orangefs_launder_folio,
600 .direct_IO = orangefs_direct_IO,
601};
602
603vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
604{
605 struct folio *folio = page_folio(vmf->page);
606 struct inode *inode = file_inode(f: vmf->vma->vm_file);
607 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
608 unsigned long *bitlock = &orangefs_inode->bitlock;
609 vm_fault_t ret;
610 struct orangefs_write_range *wr;
611
612 sb_start_pagefault(sb: inode->i_sb);
613
614 if (wait_on_bit(word: bitlock, bit: 1, TASK_KILLABLE)) {
615 ret = VM_FAULT_RETRY;
616 goto out;
617 }
618
619 folio_lock(folio);
620 if (folio_test_dirty(folio) && !folio_test_private(folio)) {
621 /*
622 * Should be impossible. If it happens, launder the folio
623 * since we don't know what's dirty. This will WARN in
624 * orangefs_writepage_locked.
625 */
626 if (orangefs_launder_folio(folio)) {
627 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
628 goto out;
629 }
630 }
631 if (folio_test_private(folio)) {
632 wr = folio_get_private(folio);
633 if (uid_eq(left: wr->uid, current_fsuid()) &&
634 gid_eq(left: wr->gid, current_fsgid())) {
635 wr->pos = page_offset(page: vmf->page);
636 wr->len = PAGE_SIZE;
637 goto okay;
638 } else {
639 if (orangefs_launder_folio(folio)) {
640 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
641 goto out;
642 }
643 }
644 }
645 wr = kmalloc(sizeof *wr, GFP_KERNEL);
646 if (!wr) {
647 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
648 goto out;
649 }
650 wr->pos = page_offset(page: vmf->page);
651 wr->len = PAGE_SIZE;
652 wr->uid = current_fsuid();
653 wr->gid = current_fsgid();
654 folio_attach_private(folio, data: wr);
655okay:
656
657 file_update_time(file: vmf->vma->vm_file);
658 if (folio->mapping != inode->i_mapping) {
659 folio_unlock(folio);
660 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
661 goto out;
662 }
663
664 /*
665 * We mark the folio dirty already here so that when freeze is in
666 * progress, we are guaranteed that writeback during freezing will
667 * see the dirty folio and writeprotect it again.
668 */
669 folio_mark_dirty(folio);
670 folio_wait_stable(folio);
671 ret = VM_FAULT_LOCKED;
672out:
673 sb_end_pagefault(sb: inode->i_sb);
674 return ret;
675}
676
677static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
678{
679 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
680 struct orangefs_kernel_op_s *new_op;
681 loff_t orig_size;
682 int ret = -EINVAL;
683
684 gossip_debug(GOSSIP_INODE_DEBUG,
685 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
686 __func__,
687 get_khandle_from_ino(inode),
688 &orangefs_inode->refn.khandle,
689 orangefs_inode->refn.fs_id,
690 iattr->ia_size);
691
692 /* Ensure that we have a up to date size, so we know if it changed. */
693 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
694 if (ret == -ESTALE)
695 ret = -EIO;
696 if (ret) {
697 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
698 __func__, ret);
699 return ret;
700 }
701 orig_size = i_size_read(inode);
702
703 /* This is truncate_setsize in a different order. */
704 truncate_pagecache(inode, new: iattr->ia_size);
705 i_size_write(inode, i_size: iattr->ia_size);
706 if (iattr->ia_size > orig_size)
707 pagecache_isize_extended(inode, from: orig_size, to: iattr->ia_size);
708
709 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
710 if (!new_op)
711 return -ENOMEM;
712
713 new_op->upcall.req.truncate.refn = orangefs_inode->refn;
714 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
715
716 ret = service_operation(op: new_op,
717 op_name: __func__,
718 get_interruptible_flag(inode));
719
720 /*
721 * the truncate has no downcall members to retrieve, but
722 * the status value tells us if it went through ok or not
723 */
724 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
725
726 op_release(op: new_op);
727
728 if (ret != 0)
729 return ret;
730
731 if (orig_size != i_size_read(inode))
732 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
733
734 return ret;
735}
736
737int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
738{
739 int ret;
740
741 if (iattr->ia_valid & ATTR_MODE) {
742 if (iattr->ia_mode & (S_ISVTX)) {
743 if (is_root_handle(inode)) {
744 /*
745 * allow sticky bit to be set on root (since
746 * it shows up that way by default anyhow),
747 * but don't show it to the server
748 */
749 iattr->ia_mode -= S_ISVTX;
750 } else {
751 gossip_debug(GOSSIP_UTILS_DEBUG,
752 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
753 ret = -EINVAL;
754 goto out;
755 }
756 }
757 if (iattr->ia_mode & (S_ISUID)) {
758 gossip_debug(GOSSIP_UTILS_DEBUG,
759 "Attempting to set setuid bit (not supported); returning EINVAL.\n");
760 ret = -EINVAL;
761 goto out;
762 }
763 }
764
765 if (iattr->ia_valid & ATTR_SIZE) {
766 ret = orangefs_setattr_size(inode, iattr);
767 if (ret)
768 goto out;
769 }
770
771again:
772 spin_lock(lock: &inode->i_lock);
773 if (ORANGEFS_I(inode)->attr_valid) {
774 if (uid_eq(left: ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
775 gid_eq(left: ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
776 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
777 } else {
778 spin_unlock(lock: &inode->i_lock);
779 write_inode_now(inode, sync: 1);
780 goto again;
781 }
782 } else {
783 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
784 ORANGEFS_I(inode)->attr_uid = current_fsuid();
785 ORANGEFS_I(inode)->attr_gid = current_fsgid();
786 }
787 setattr_copy(&nop_mnt_idmap, inode, attr: iattr);
788 spin_unlock(lock: &inode->i_lock);
789 mark_inode_dirty(inode);
790
791 ret = 0;
792out:
793 return ret;
794}
795
796int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr)
797{
798 int ret;
799 struct inode *inode = d_inode(dentry);
800
801 ret = __orangefs_setattr(inode, iattr);
802 /* change mode on a file that has ACLs */
803 if (!ret && (iattr->ia_valid & ATTR_MODE))
804 ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode);
805 return ret;
806}
807
808/*
809 * Change attributes of an object referenced by dentry.
810 */
811int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
812 struct iattr *iattr)
813{
814 int ret;
815 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
816 dentry);
817 ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
818 if (ret)
819 goto out;
820 ret = __orangefs_setattr_mode(dentry, iattr);
821 sync_inode_metadata(inode: d_inode(dentry), wait: 1);
822out:
823 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
824 ret);
825 return ret;
826}
827
828/*
829 * Obtain attributes of an object given a dentry
830 */
831int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path,
832 struct kstat *stat, u32 request_mask, unsigned int flags)
833{
834 int ret;
835 struct inode *inode = path->dentry->d_inode;
836
837 gossip_debug(GOSSIP_INODE_DEBUG,
838 "orangefs_getattr: called on %pd mask %u\n",
839 path->dentry, request_mask);
840
841 ret = orangefs_inode_getattr(inode,
842 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
843 if (ret == 0) {
844 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
845
846 /* override block size reported to stat */
847 if (!(request_mask & STATX_SIZE))
848 stat->result_mask &= ~STATX_SIZE;
849
850 generic_fill_statx_attr(inode, stat);
851 }
852 return ret;
853}
854
855int orangefs_permission(struct mnt_idmap *idmap,
856 struct inode *inode, int mask)
857{
858 int ret;
859
860 if (mask & MAY_NOT_BLOCK)
861 return -ECHILD;
862
863 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
864
865 /* Make sure the permission (and other common attrs) are up to date. */
866 ret = orangefs_inode_getattr(inode, 0);
867 if (ret < 0)
868 return ret;
869
870 return generic_permission(&nop_mnt_idmap, inode, mask);
871}
872
873int orangefs_update_time(struct inode *inode, int flags)
874{
875 struct iattr iattr;
876
877 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
878 get_khandle_from_ino(inode));
879 flags = generic_update_time(inode, flags);
880 memset(&iattr, 0, sizeof iattr);
881 if (flags & S_ATIME)
882 iattr.ia_valid |= ATTR_ATIME;
883 if (flags & S_CTIME)
884 iattr.ia_valid |= ATTR_CTIME;
885 if (flags & S_MTIME)
886 iattr.ia_valid |= ATTR_MTIME;
887 return __orangefs_setattr(inode, iattr: &iattr);
888}
889
890static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
891{
892 u64 val = 0;
893 int ret;
894
895 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
896 dentry);
897
898 ret = orangefs_inode_getxattr(inode: d_inode(dentry),
899 name: "user.pvfs2.meta_hint",
900 buffer: &val, size: sizeof(val));
901 if (ret < 0 && ret != -ENODATA)
902 return ret;
903
904 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
905
906 fileattr_fill_flags(fa, flags: val);
907 return 0;
908}
909
910static int orangefs_fileattr_set(struct mnt_idmap *idmap,
911 struct dentry *dentry, struct fileattr *fa)
912{
913 u64 val = 0;
914
915 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
916 dentry);
917 /*
918 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
919 * turned on for a file. The user is not allowed to turn on this bit,
920 * but the bit is present if the user first gets the flags and then
921 * updates the flags with some new settings. So, we ignore it in the
922 * following edit. bligon.
923 */
924 if (fileattr_has_fsx(fa) ||
925 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
926 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
927 __func__);
928 return -EOPNOTSUPP;
929 }
930 val = fa->flags;
931 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
932 return orangefs_inode_setxattr(inode: d_inode(dentry),
933 name: "user.pvfs2.meta_hint",
934 value: &val, size: sizeof(val), flags: 0);
935}
936
937/* ORANGEFS2 implementation of VFS inode operations for files */
938static const struct inode_operations orangefs_file_inode_operations = {
939 .get_inode_acl = orangefs_get_acl,
940 .set_acl = orangefs_set_acl,
941 .setattr = orangefs_setattr,
942 .getattr = orangefs_getattr,
943 .listxattr = orangefs_listxattr,
944 .permission = orangefs_permission,
945 .update_time = orangefs_update_time,
946 .fileattr_get = orangefs_fileattr_get,
947 .fileattr_set = orangefs_fileattr_set,
948};
949
950static int orangefs_init_iops(struct inode *inode)
951{
952 inode->i_mapping->a_ops = &orangefs_address_operations;
953
954 switch (inode->i_mode & S_IFMT) {
955 case S_IFREG:
956 inode->i_op = &orangefs_file_inode_operations;
957 inode->i_fop = &orangefs_file_operations;
958 break;
959 case S_IFLNK:
960 inode->i_op = &orangefs_symlink_inode_operations;
961 break;
962 case S_IFDIR:
963 inode->i_op = &orangefs_dir_inode_operations;
964 inode->i_fop = &orangefs_dir_operations;
965 break;
966 default:
967 gossip_debug(GOSSIP_INODE_DEBUG,
968 "%s: unsupported mode\n",
969 __func__);
970 return -EINVAL;
971 }
972
973 return 0;
974}
975
976/*
977 * Given an ORANGEFS object identifier (fsid, handle), convert it into
978 * a ino_t type that will be used as a hash-index from where the handle will
979 * be searched for in the VFS hash table of inodes.
980 */
981static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
982{
983 if (!ref)
984 return 0;
985 return orangefs_khandle_to_ino(khandle: &(ref->khandle));
986}
987
988/*
989 * Called to set up an inode from iget5_locked.
990 */
991static int orangefs_set_inode(struct inode *inode, void *data)
992{
993 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
994 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
995 ORANGEFS_I(inode)->refn.khandle = ref->khandle;
996 ORANGEFS_I(inode)->attr_valid = 0;
997 hash_init(ORANGEFS_I(inode)->xattr_cache);
998 ORANGEFS_I(inode)->mapping_time = jiffies - 1;
999 ORANGEFS_I(inode)->bitlock = 0;
1000 return 0;
1001}
1002
1003/*
1004 * Called to determine if handles match.
1005 */
1006static int orangefs_test_inode(struct inode *inode, void *data)
1007{
1008 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
1009 struct orangefs_inode_s *orangefs_inode = NULL;
1010
1011 orangefs_inode = ORANGEFS_I(inode);
1012 /* test handles and fs_ids... */
1013 return (!ORANGEFS_khandle_cmp(kh1: &(orangefs_inode->refn.khandle),
1014 kh2: &(ref->khandle)) &&
1015 orangefs_inode->refn.fs_id == ref->fs_id);
1016}
1017
1018/*
1019 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
1020 * file handle.
1021 *
1022 * @sb: the file system super block instance.
1023 * @ref: The ORANGEFS object for which we are trying to locate an inode.
1024 */
1025struct inode *orangefs_iget(struct super_block *sb,
1026 struct orangefs_object_kref *ref)
1027{
1028 struct inode *inode = NULL;
1029 unsigned long hash;
1030 int error;
1031
1032 hash = orangefs_handle_hash(ref);
1033 inode = iget5_locked(sb,
1034 hash,
1035 test: orangefs_test_inode,
1036 set: orangefs_set_inode,
1037 ref);
1038
1039 if (!inode)
1040 return ERR_PTR(error: -ENOMEM);
1041
1042 if (!(inode->i_state & I_NEW))
1043 return inode;
1044
1045 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1046 if (error) {
1047 iget_failed(inode);
1048 return ERR_PTR(error);
1049 }
1050
1051 inode->i_ino = hash; /* needed for stat etc */
1052 orangefs_init_iops(inode);
1053 unlock_new_inode(inode);
1054
1055 gossip_debug(GOSSIP_INODE_DEBUG,
1056 "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
1057 &ref->khandle,
1058 ref->fs_id,
1059 hash,
1060 inode->i_ino);
1061
1062 return inode;
1063}
1064
1065/*
1066 * Allocate an inode for a newly created file and insert it into the inode hash.
1067 */
1068struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
1069 umode_t mode, dev_t dev, struct orangefs_object_kref *ref)
1070{
1071 struct posix_acl *acl = NULL, *default_acl = NULL;
1072 unsigned long hash = orangefs_handle_hash(ref);
1073 struct inode *inode;
1074 int error;
1075
1076 gossip_debug(GOSSIP_INODE_DEBUG,
1077 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
1078 __func__,
1079 sb,
1080 MAJOR(dev),
1081 MINOR(dev),
1082 mode);
1083
1084 inode = new_inode(sb);
1085 if (!inode)
1086 return ERR_PTR(error: -ENOMEM);
1087
1088 error = posix_acl_create(dir, &mode, &default_acl, &acl);
1089 if (error)
1090 goto out_iput;
1091
1092 orangefs_set_inode(inode, data: ref);
1093 inode->i_ino = hash; /* needed for stat etc */
1094
1095 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
1096 if (error)
1097 goto out_iput;
1098
1099 orangefs_init_iops(inode);
1100 inode->i_rdev = dev;
1101
1102 if (default_acl) {
1103 error = __orangefs_set_acl(inode, acl: default_acl,
1104 ACL_TYPE_DEFAULT);
1105 if (error)
1106 goto out_iput;
1107 }
1108
1109 if (acl) {
1110 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS);
1111 if (error)
1112 goto out_iput;
1113 }
1114
1115 error = insert_inode_locked4(inode, hash, test: orangefs_test_inode, ref);
1116 if (error < 0)
1117 goto out_iput;
1118
1119 gossip_debug(GOSSIP_INODE_DEBUG,
1120 "Initializing ACL's for inode %pU\n",
1121 get_khandle_from_ino(inode));
1122 if (mode != inode->i_mode) {
1123 struct iattr iattr = {
1124 .ia_mode = mode,
1125 .ia_valid = ATTR_MODE,
1126 };
1127 inode->i_mode = mode;
1128 __orangefs_setattr(inode, iattr: &iattr);
1129 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
1130 }
1131 posix_acl_release(acl);
1132 posix_acl_release(acl: default_acl);
1133 return inode;
1134
1135out_iput:
1136 iput(inode);
1137 posix_acl_release(acl);
1138 posix_acl_release(acl: default_acl);
1139 return ERR_PTR(error);
1140}
1141

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source code of linux/fs/orangefs/inode.c