1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/ceph/striper.h>
4
5 #include <linux/module.h>
6 #include <linux/sched.h>
7 #include <linux/slab.h>
8 #include <linux/file.h>
9 #include <linux/mount.h>
10 #include <linux/namei.h>
11 #include <linux/writeback.h>
12 #include <linux/falloc.h>
13 #include <linux/iversion.h>
14 #include <linux/ktime.h>
15 #include <linux/splice.h>
16
17 #include "super.h"
18 #include "mds_client.h"
19 #include "cache.h"
20 #include "io.h"
21 #include "metric.h"
22
23 static __le32 ceph_flags_sys2wire(struct ceph_mds_client *mdsc, u32 flags)
24 {
25 struct ceph_client *cl = mdsc->fsc->client;
26 u32 wire_flags = 0;
27
28 switch (flags & O_ACCMODE) {
29 case O_RDONLY:
30 wire_flags |= CEPH_O_RDONLY;
31 break;
32 case O_WRONLY:
33 wire_flags |= CEPH_O_WRONLY;
34 break;
35 case O_RDWR:
36 wire_flags |= CEPH_O_RDWR;
37 break;
38 }
39
40 flags &= ~O_ACCMODE;
41
42 #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
43
44 ceph_sys2wire(O_CREAT);
45 ceph_sys2wire(O_EXCL);
46 ceph_sys2wire(O_TRUNC);
47 ceph_sys2wire(O_DIRECTORY);
48 ceph_sys2wire(O_NOFOLLOW);
49
50 #undef ceph_sys2wire
51
52 if (flags)
53 doutc(cl, "unused open flags: %x\n", flags);
54
55 return cpu_to_le32(wire_flags);
56 }
57
58 /*
59 * Ceph file operations
60 *
61 * Implement basic open/close functionality, and implement
62 * read/write.
63 *
64 * We implement three modes of file I/O:
65 * - buffered uses the generic_file_aio_{read,write} helpers
66 *
67 * - synchronous is used when there is multi-client read/write
68 * sharing, avoids the page cache, and synchronously waits for an
69 * ack from the OSD.
70 *
71 * - direct io takes the variant of the sync path that references
72 * user pages directly.
73 *
74 * fsync() flushes and waits on dirty pages, but just queues metadata
75 * for writeback: since the MDS can recover size and mtime there is no
76 * need to wait for MDS acknowledgement.
77 */
78
79 /*
80 * How many pages to get in one call to iov_iter_get_pages(). This
81 * determines the size of the on-stack array used as a buffer.
82 */
83 #define ITER_GET_BVECS_PAGES 64
84
85 static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize,
86 struct bio_vec *bvecs)
87 {
88 size_t size = 0;
89 int bvec_idx = 0;
90
91 if (maxsize > iov_iter_count(iter))
92 maxsize = iov_iter_count(iter);
93
94 while (size < maxsize) {
95 struct page *pages[ITER_GET_BVECS_PAGES];
96 ssize_t bytes;
97 size_t start;
98 int idx = 0;
99
100 bytes = iov_iter_get_pages2(iter, pages, maxsize - size,
101 ITER_GET_BVECS_PAGES, &start);
102 if (bytes < 0)
103 return size ?: bytes;
104
105 size += bytes;
106
107 for ( ; bytes; idx++, bvec_idx++) {
108 int len = min_t(int, bytes, PAGE_SIZE - start);
109
110 bvec_set_page(&bvecs[bvec_idx], pages[idx], len, start);
111 bytes -= len;
112 start = 0;
113 }
114 }
115
116 return size;
117 }
118
119 /*
120 * iov_iter_get_pages() only considers one iov_iter segment, no matter
121 * what maxsize or maxpages are given. For ITER_BVEC that is a single
122 * page.
123 *
124 * Attempt to get up to @maxsize bytes worth of pages from @iter.
125 * Return the number of bytes in the created bio_vec array, or an error.
126 */
127 static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize,
128 struct bio_vec **bvecs, int *num_bvecs)
129 {
130 struct bio_vec *bv;
131 size_t orig_count = iov_iter_count(iter);
132 ssize_t bytes;
133 int npages;
134
135 iov_iter_truncate(iter, maxsize);
136 npages = iov_iter_npages(iter, INT_MAX);
137 iov_iter_reexpand(iter, orig_count);
138
139 /*
140 * __iter_get_bvecs() may populate only part of the array -- zero it
141 * out.
142 */
143 bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO);
144 if (!bv)
145 return -ENOMEM;
146
147 bytes = __iter_get_bvecs(iter, maxsize, bv);
148 if (bytes < 0) {
149 /*
150 * No pages were pinned -- just free the array.
151 */
152 kvfree(bv);
153 return bytes;
154 }
155
156 *bvecs = bv;
157 *num_bvecs = npages;
158 return bytes;
159 }
160
161 static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty)
162 {
163 int i;
164
165 for (i = 0; i < num_bvecs; i++) {
166 if (bvecs[i].bv_page) {
167 if (should_dirty)
168 set_page_dirty_lock(bvecs[i].bv_page);
169 put_page(bvecs[i].bv_page);
170 }
171 }
172 kvfree(bvecs);
173 }
174
175 /*
176 * Prepare an open request. Preallocate ceph_cap to avoid an
177 * inopportune ENOMEM later.
178 */
179 static struct ceph_mds_request *
180 prepare_open_request(struct super_block *sb, int flags, int create_mode)
181 {
182 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb);
183 struct ceph_mds_request *req;
184 int want_auth = USE_ANY_MDS;
185 int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN;
186
187 if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC))
188 want_auth = USE_AUTH_MDS;
189
190 req = ceph_mdsc_create_request(mdsc, op, want_auth);
191 if (IS_ERR(req))
192 goto out;
193 req->r_fmode = ceph_flags_to_mode(flags);
194 req->r_args.open.flags = ceph_flags_sys2wire(mdsc, flags);
195 req->r_args.open.mode = cpu_to_le32(create_mode);
196 out:
197 return req;
198 }
199
200 static int ceph_init_file_info(struct inode *inode, struct file *file,
201 int fmode, bool isdir)
202 {
203 struct ceph_inode_info *ci = ceph_inode(inode);
204 struct ceph_mount_options *opt =
205 ceph_inode_to_fs_client(&ci->netfs.inode)->mount_options;
206 struct ceph_client *cl = ceph_inode_to_client(inode);
207 struct ceph_file_info *fi;
208 int ret;
209
210 doutc(cl, "%p %llx.%llx %p 0%o (%s)\n", inode, ceph_vinop(inode),
211 file, inode->i_mode, isdir ? "dir" : "regular");
212 BUG_ON(inode->i_fop->release != ceph_release);
213
214 if (isdir) {
215 struct ceph_dir_file_info *dfi =
216 kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
217 if (!dfi)
218 return -ENOMEM;
219
220 file->private_data = dfi;
221 fi = &dfi->file_info;
222 dfi->next_offset = 2;
223 dfi->readdir_cache_idx = -1;
224 } else {
225 fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
226 if (!fi)
227 return -ENOMEM;
228
229 if (opt->flags & CEPH_MOUNT_OPT_NOPAGECACHE)
230 fi->flags |= CEPH_F_SYNC;
231
232 file->private_data = fi;
233 }
234
235 ceph_get_fmode(ci, fmode, 1);
236 fi->fmode = fmode;
237
238 spin_lock_init(&fi->rw_contexts_lock);
239 INIT_LIST_HEAD(&fi->rw_contexts);
240 fi->filp_gen = READ_ONCE(ceph_inode_to_fs_client(inode)->filp_gen);
241
242 if ((file->f_mode & FMODE_WRITE) && ceph_has_inline_data(ci)) {
243 ret = ceph_uninline_data(file);
244 if (ret < 0)
245 goto error;
246 }
247
248 return 0;
249
250 error:
251 ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE);
252 ceph_put_fmode(ci, fi->fmode, 1);
253 kmem_cache_free(ceph_file_cachep, fi);
254 /* wake up anyone waiting for caps on this inode */
255 wake_up_all(&ci->i_cap_wq);
256 return ret;
257 }
258
259 /*
260 * initialize private struct file data.
261 * if we fail, clean up by dropping fmode reference on the ceph_inode
262 */
263 static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
264 {
265 struct ceph_client *cl = ceph_inode_to_client(inode);
266 int ret = 0;
267
268 switch (inode->i_mode & S_IFMT) {
269 case S_IFREG:
270 ceph_fscache_use_cookie(inode, file->f_mode & FMODE_WRITE);
271 fallthrough;
272 case S_IFDIR:
273 ret = ceph_init_file_info(inode, file, fmode,
274 S_ISDIR(inode->i_mode));
275 break;
276
277 case S_IFLNK:
278 doutc(cl, "%p %llx.%llx %p 0%o (symlink)\n", inode,
279 ceph_vinop(inode), file, inode->i_mode);
280 break;
281
282 default:
283 doutc(cl, "%p %llx.%llx %p 0%o (special)\n", inode,
284 ceph_vinop(inode), file, inode->i_mode);
285 /*
286 * we need to drop the open ref now, since we don't
287 * have .release set to ceph_release.
288 */
289 BUG_ON(inode->i_fop->release == ceph_release);
290
291 /* call the proper open fop */
292 ret = inode->i_fop->open(inode, file);
293 }
294 return ret;
295 }
296
297 /*
298 * try renew caps after session gets killed.
299 */
300 int ceph_renew_caps(struct inode *inode, int fmode)
301 {
302 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
303 struct ceph_client *cl = mdsc->fsc->client;
304 struct ceph_inode_info *ci = ceph_inode(inode);
305 struct ceph_mds_request *req;
306 int err, flags, wanted;
307
308 spin_lock(&ci->i_ceph_lock);
309 __ceph_touch_fmode(ci, mdsc, fmode);
310 wanted = __ceph_caps_file_wanted(ci);
311 if (__ceph_is_any_real_caps(ci) &&
312 (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
313 int issued = __ceph_caps_issued(ci, NULL);
314 spin_unlock(&ci->i_ceph_lock);
315 doutc(cl, "%p %llx.%llx want %s issued %s updating mds_wanted\n",
316 inode, ceph_vinop(inode), ceph_cap_string(wanted),
317 ceph_cap_string(issued));
318 ceph_check_caps(ci, 0);
319 return 0;
320 }
321 spin_unlock(&ci->i_ceph_lock);
322
323 flags = 0;
324 if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
325 flags = O_RDWR;
326 else if (wanted & CEPH_CAP_FILE_RD)
327 flags = O_RDONLY;
328 else if (wanted & CEPH_CAP_FILE_WR)
329 flags = O_WRONLY;
330 #ifdef O_LAZY
331 if (wanted & CEPH_CAP_FILE_LAZYIO)
332 flags |= O_LAZY;
333 #endif
334
335 req = prepare_open_request(inode->i_sb, flags, 0);
336 if (IS_ERR(req)) {
337 err = PTR_ERR(req);
338 goto out;
339 }
340
341 req->r_inode = inode;
342 ihold(inode);
343 req->r_num_caps = 1;
344
345 err = ceph_mdsc_do_request(mdsc, NULL, req);
346 ceph_mdsc_put_request(req);
347 out:
348 doutc(cl, "%p %llx.%llx open result=%d\n", inode, ceph_vinop(inode),
349 err);
350 return err < 0 ? err : 0;
351 }
352
353 /*
354 * If we already have the requisite capabilities, we can satisfy
355 * the open request locally (no need to request new caps from the
356 * MDS). We do, however, need to inform the MDS (asynchronously)
357 * if our wanted caps set expands.
358 */
359 int ceph_open(struct inode *inode, struct file *file)
360 {
361 struct ceph_inode_info *ci = ceph_inode(inode);
362 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb);
363 struct ceph_client *cl = fsc->client;
364 struct ceph_mds_client *mdsc = fsc->mdsc;
365 struct ceph_mds_request *req;
366 struct ceph_file_info *fi = file->private_data;
367 int err;
368 int flags, fmode, wanted;
369 struct dentry *dentry;
370 char *path;
371 int pathlen;
372 u64 pathbase;
373 bool do_sync = false;
374 int mask = MAY_READ;
375
376 if (fi) {
377 doutc(cl, "file %p is already opened\n", file);
378 return 0;
379 }
380
381 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
382 flags = file->f_flags & ~(O_CREAT|O_EXCL);
383 if (S_ISDIR(inode->i_mode)) {
384 flags = O_DIRECTORY; /* mds likes to know */
385 } else if (S_ISREG(inode->i_mode)) {
386 err = fscrypt_file_open(inode, file);
387 if (err)
388 return err;
389 }
390
391 doutc(cl, "%p %llx.%llx file %p flags %d (%d)\n", inode,
392 ceph_vinop(inode), file, flags, file->f_flags);
393 fmode = ceph_flags_to_mode(flags);
394 wanted = ceph_caps_for_mode(fmode);
395
396 if (fmode & CEPH_FILE_MODE_WR)
397 mask |= MAY_WRITE;
398 dentry = d_find_alias(inode);
399 if (!dentry) {
400 do_sync = true;
401 } else {
402 path = ceph_mdsc_build_path(mdsc, dentry, &pathlen, &pathbase, 0);
403 if (IS_ERR(path)) {
404 do_sync = true;
405 err = 0;
406 } else {
407 err = ceph_mds_check_access(mdsc, path, mask);
408 }
409 ceph_mdsc_free_path(path, pathlen);
410 dput(dentry);
411
412 /* For none EACCES cases will let the MDS do the mds auth check */
413 if (err == -EACCES) {
414 return err;
415 } else if (err < 0) {
416 do_sync = true;
417 err = 0;
418 }
419 }
420
421 /* snapped files are read-only */
422 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
423 return -EROFS;
424
425 /* trivially open snapdir */
426 if (ceph_snap(inode) == CEPH_SNAPDIR) {
427 return ceph_init_file(inode, file, fmode);
428 }
429
430 /*
431 * No need to block if we have caps on the auth MDS (for
432 * write) or any MDS (for read). Update wanted set
433 * asynchronously.
434 */
435 spin_lock(&ci->i_ceph_lock);
436 if (!do_sync && __ceph_is_any_real_caps(ci) &&
437 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
438 int mds_wanted = __ceph_caps_mds_wanted(ci, true);
439 int issued = __ceph_caps_issued(ci, NULL);
440
441 doutc(cl, "open %p fmode %d want %s issued %s using existing\n",
442 inode, fmode, ceph_cap_string(wanted),
443 ceph_cap_string(issued));
444 __ceph_touch_fmode(ci, mdsc, fmode);
445 spin_unlock(&ci->i_ceph_lock);
446
447 /* adjust wanted? */
448 if ((issued & wanted) != wanted &&
449 (mds_wanted & wanted) != wanted &&
450 ceph_snap(inode) != CEPH_SNAPDIR)
451 ceph_check_caps(ci, 0);
452
453 return ceph_init_file(inode, file, fmode);
454 } else if (!do_sync && ceph_snap(inode) != CEPH_NOSNAP &&
455 (ci->i_snap_caps & wanted) == wanted) {
456 __ceph_touch_fmode(ci, mdsc, fmode);
457 spin_unlock(&ci->i_ceph_lock);
458 return ceph_init_file(inode, file, fmode);
459 }
460
461 spin_unlock(&ci->i_ceph_lock);
462
463 doutc(cl, "open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
464 req = prepare_open_request(inode->i_sb, flags, 0);
465 if (IS_ERR(req)) {
466 err = PTR_ERR(req);
467 goto out;
468 }
469 req->r_inode = inode;
470 ihold(inode);
471
472 req->r_num_caps = 1;
473 err = ceph_mdsc_do_request(mdsc, NULL, req);
474 if (!err)
475 err = ceph_init_file(inode, file, req->r_fmode);
476 ceph_mdsc_put_request(req);
477 doutc(cl, "open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
478 out:
479 return err;
480 }
481
482 /* Clone the layout from a synchronous create, if the dir now has Dc caps */
483 static void
484 cache_file_layout(struct inode *dst, struct inode *src)
485 {
486 struct ceph_inode_info *cdst = ceph_inode(dst);
487 struct ceph_inode_info *csrc = ceph_inode(src);
488
489 spin_lock(&cdst->i_ceph_lock);
490 if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) &&
491 !ceph_file_layout_is_valid(&cdst->i_cached_layout)) {
492 memcpy(&cdst->i_cached_layout, &csrc->i_layout,
493 sizeof(cdst->i_cached_layout));
494 rcu_assign_pointer(cdst->i_cached_layout.pool_ns,
495 ceph_try_get_string(csrc->i_layout.pool_ns));
496 }
497 spin_unlock(&cdst->i_ceph_lock);
498 }
499
500 /*
501 * Try to set up an async create. We need caps, a file layout, and inode number,
502 * and either a lease on the dentry or complete dir info. If any of those
503 * criteria are not satisfied, then return false and the caller can go
504 * synchronous.
505 */
506 static int try_prep_async_create(struct inode *dir, struct dentry *dentry,
507 struct ceph_file_layout *lo, u64 *pino)
508 {
509 struct ceph_inode_info *ci = ceph_inode(dir);
510 struct ceph_dentry_info *di = ceph_dentry(dentry);
511 int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
512 u64 ino;
513
514 spin_lock(&ci->i_ceph_lock);
515 /* No auth cap means no chance for Dc caps */
516 if (!ci->i_auth_cap)
517 goto no_async;
518
519 /* Any delegated inos? */
520 if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos))
521 goto no_async;
522
523 if (!ceph_file_layout_is_valid(&ci->i_cached_layout))
524 goto no_async;
525
526 if ((__ceph_caps_issued(ci, NULL) & want) != want)
527 goto no_async;
528
529 if (d_in_lookup(dentry)) {
530 if (!__ceph_dir_is_complete(ci))
531 goto no_async;
532 spin_lock(&dentry->d_lock);
533 di->lease_shared_gen = atomic_read(&ci->i_shared_gen);
534 spin_unlock(&dentry->d_lock);
535 } else if (atomic_read(&ci->i_shared_gen) !=
536 READ_ONCE(di->lease_shared_gen)) {
537 goto no_async;
538 }
539
540 ino = ceph_get_deleg_ino(ci->i_auth_cap->session);
541 if (!ino)
542 goto no_async;
543
544 *pino = ino;
545 ceph_take_cap_refs(ci, want, false);
546 memcpy(lo, &ci->i_cached_layout, sizeof(*lo));
547 rcu_assign_pointer(lo->pool_ns,
548 ceph_try_get_string(ci->i_cached_layout.pool_ns));
549 got = want;
550 no_async:
551 spin_unlock(&ci->i_ceph_lock);
552 return got;
553 }
554
555 static void restore_deleg_ino(struct inode *dir, u64 ino)
556 {
557 struct ceph_client *cl = ceph_inode_to_client(dir);
558 struct ceph_inode_info *ci = ceph_inode(dir);
559 struct ceph_mds_session *s = NULL;
560
561 spin_lock(&ci->i_ceph_lock);
562 if (ci->i_auth_cap)
563 s = ceph_get_mds_session(ci->i_auth_cap->session);
564 spin_unlock(&ci->i_ceph_lock);
565 if (s) {
566 int err = ceph_restore_deleg_ino(s, ino);
567 if (err)
568 pr_warn_client(cl,
569 "unable to restore delegated ino 0x%llx to session: %d\n",
570 ino, err);
571 ceph_put_mds_session(s);
572 }
573 }
574
575 static void wake_async_create_waiters(struct inode *inode,
576 struct ceph_mds_session *session)
577 {
578 struct ceph_inode_info *ci = ceph_inode(inode);
579 bool check_cap = false;
580
581 spin_lock(&ci->i_ceph_lock);
582 if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
583 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
584 wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
585
586 if (ci->i_ceph_flags & CEPH_I_ASYNC_CHECK_CAPS) {
587 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CHECK_CAPS;
588 check_cap = true;
589 }
590 }
591 ceph_kick_flushing_inode_caps(session, ci);
592 spin_unlock(&ci->i_ceph_lock);
593
594 if (check_cap)
595 ceph_check_caps(ci, CHECK_CAPS_FLUSH);
596 }
597
598 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
599 struct ceph_mds_request *req)
600 {
601 struct ceph_client *cl = mdsc->fsc->client;
602 struct dentry *dentry = req->r_dentry;
603 struct inode *dinode = d_inode(dentry);
604 struct inode *tinode = req->r_target_inode;
605 int result = req->r_err ? req->r_err :
606 le32_to_cpu(req->r_reply_info.head->result);
607
608 WARN_ON_ONCE(dinode && tinode && dinode != tinode);
609
610 /* MDS changed -- caller must resubmit */
611 if (result == -EJUKEBOX)
612 goto out;
613
614 mapping_set_error(req->r_parent->i_mapping, result);
615
616 if (result) {
617 int pathlen = 0;
618 u64 base = 0;
619 char *path = ceph_mdsc_build_path(mdsc, req->r_dentry, &pathlen,
620 &base, 0);
621
622 pr_warn_client(cl,
623 "async create failure path=(%llx)%s result=%d!\n",
624 base, IS_ERR(path) ? "<<bad>>" : path, result);
625 ceph_mdsc_free_path(path, pathlen);
626
627 ceph_dir_clear_complete(req->r_parent);
628 if (!d_unhashed(dentry))
629 d_drop(dentry);
630
631 if (dinode) {
632 mapping_set_error(dinode->i_mapping, result);
633 ceph_inode_shutdown(dinode);
634 wake_async_create_waiters(dinode, req->r_session);
635 }
636 }
637
638 if (tinode) {
639 u64 ino = ceph_vino(tinode).ino;
640
641 if (req->r_deleg_ino != ino)
642 pr_warn_client(cl,
643 "inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n",
644 req->r_err, req->r_deleg_ino, ino);
645
646 mapping_set_error(tinode->i_mapping, result);
647 wake_async_create_waiters(tinode, req->r_session);
648 } else if (!result) {
649 pr_warn_client(cl, "no req->r_target_inode for 0x%llx\n",
650 req->r_deleg_ino);
651 }
652 out:
653 ceph_mdsc_release_dir_caps(req);
654 }
655
656 static int ceph_finish_async_create(struct inode *dir, struct inode *inode,
657 struct dentry *dentry,
658 struct file *file, umode_t mode,
659 struct ceph_mds_request *req,
660 struct ceph_acl_sec_ctx *as_ctx,
661 struct ceph_file_layout *lo)
662 {
663 int ret;
664 char xattr_buf[4];
665 struct ceph_mds_reply_inode in = { };
666 struct ceph_mds_reply_info_in iinfo = { .in = &in };
667 struct ceph_inode_info *ci = ceph_inode(dir);
668 struct ceph_dentry_info *di = ceph_dentry(dentry);
669 struct timespec64 now;
670 struct ceph_string *pool_ns;
671 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb);
672 struct ceph_client *cl = mdsc->fsc->client;
673 struct ceph_vino vino = { .ino = req->r_deleg_ino,
674 .snap = CEPH_NOSNAP };
675
676 ktime_get_real_ts64(&now);
677
678 iinfo.inline_version = CEPH_INLINE_NONE;
679 iinfo.change_attr = 1;
680 ceph_encode_timespec64(&iinfo.btime, &now);
681
682 if (req->r_pagelist) {
683 iinfo.xattr_len = req->r_pagelist->length;
684 iinfo.xattr_data = req->r_pagelist->mapped_tail;
685 } else {
686 /* fake it */
687 iinfo.xattr_len = ARRAY_SIZE(xattr_buf);
688 iinfo.xattr_data = xattr_buf;
689 memset(iinfo.xattr_data, 0, iinfo.xattr_len);
690 }
691
692 in.ino = cpu_to_le64(vino.ino);
693 in.snapid = cpu_to_le64(CEPH_NOSNAP);
694 in.version = cpu_to_le64(1); // ???
695 in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
696 in.cap.cap_id = cpu_to_le64(1);
697 in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
698 in.cap.flags = CEPH_CAP_FLAG_AUTH;
699 in.ctime = in.mtime = in.atime = iinfo.btime;
700 in.truncate_seq = cpu_to_le32(1);
701 in.truncate_size = cpu_to_le64(-1ULL);
702 in.xattr_version = cpu_to_le64(1);
703 in.uid = cpu_to_le32(from_kuid(&init_user_ns,
704 mapped_fsuid(req->r_mnt_idmap,
705 &init_user_ns)));
706 if (dir->i_mode & S_ISGID) {
707 in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid));
708
709 /* Directories always inherit the setgid bit. */
710 if (S_ISDIR(mode))
711 mode |= S_ISGID;
712 } else {
713 in.gid = cpu_to_le32(from_kgid(&init_user_ns,
714 mapped_fsgid(req->r_mnt_idmap,
715 &init_user_ns)));
716 }
717 in.mode = cpu_to_le32((u32)mode);
718
719 in.nlink = cpu_to_le32(1);
720 in.max_size = cpu_to_le64(lo->stripe_unit);
721
722 ceph_file_layout_to_legacy(lo, &in.layout);
723 /* lo is private, so pool_ns can't change */
724 pool_ns = rcu_dereference_raw(lo->pool_ns);
725 if (pool_ns) {
726 iinfo.pool_ns_len = pool_ns->len;
727 iinfo.pool_ns_data = pool_ns->str;
728 }
729
730 down_read(&mdsc->snap_rwsem);
731 ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
732 req->r_fmode, NULL);
733 up_read(&mdsc->snap_rwsem);
734 if (ret) {
735 doutc(cl, "failed to fill inode: %d\n", ret);
736 ceph_dir_clear_complete(dir);
737 if (!d_unhashed(dentry))
738 d_drop(dentry);
739 discard_new_inode(inode);
740 } else {
741 struct dentry *dn;
742
743 doutc(cl, "d_adding new inode 0x%llx to 0x%llx/%s\n",
744 vino.ino, ceph_ino(dir), dentry->d_name.name);
745 ceph_dir_clear_ordered(dir);
746 ceph_init_inode_acls(inode, as_ctx);
747 if (inode->i_state & I_NEW) {
748 /*
749 * If it's not I_NEW, then someone created this before
750 * we got here. Assume the server is aware of it at
751 * that point and don't worry about setting
752 * CEPH_I_ASYNC_CREATE.
753 */
754 ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE;
755 unlock_new_inode(inode);
756 }
757 if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
758 if (!d_unhashed(dentry))
759 d_drop(dentry);
760 dn = d_splice_alias(inode, dentry);
761 WARN_ON_ONCE(dn && dn != dentry);
762 }
763 file->f_mode |= FMODE_CREATED;
764 ret = finish_open(file, dentry, ceph_open);
765 }
766
767 spin_lock(&dentry->d_lock);
768 di->flags &= ~CEPH_DENTRY_ASYNC_CREATE;
769 wake_up_bit(&di->flags, CEPH_DENTRY_ASYNC_CREATE_BIT);
770 spin_unlock(&dentry->d_lock);
771
772 return ret;
773 }
774
775 /*
776 * Do a lookup + open with a single request. If we get a non-existent
777 * file or symlink, return 1 so the VFS can retry.
778 */
779 int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
780 struct file *file, unsigned flags, umode_t mode)
781 {
782 struct mnt_idmap *idmap = file_mnt_idmap(file);
783 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(dir->i_sb);
784 struct ceph_client *cl = fsc->client;
785 struct ceph_mds_client *mdsc = fsc->mdsc;
786 struct ceph_mds_request *req;
787 struct inode *new_inode = NULL;
788 struct dentry *dn;
789 struct ceph_acl_sec_ctx as_ctx = {};
790 bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS);
791 int mask;
792 int err;
793 char *path;
794 int pathlen;
795 u64 pathbase;
796
797 doutc(cl, "%p %llx.%llx dentry %p '%pd' %s flags %d mode 0%o\n",
798 dir, ceph_vinop(dir), dentry, dentry,
799 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
800
801 if (dentry->d_name.len > NAME_MAX)
802 return -ENAMETOOLONG;
803
804 err = ceph_wait_on_conflict_unlink(dentry);
805 if (err)
806 return err;
807 /*
808 * Do not truncate the file, since atomic_open is called before the
809 * permission check. The caller will do the truncation afterward.
810 */
811 flags &= ~O_TRUNC;
812
813 dn = d_find_alias(dir);
814 if (!dn) {
815 try_async = false;
816 } else {
817 path = ceph_mdsc_build_path(mdsc, dn, &pathlen, &pathbase, 0);
818 if (IS_ERR(path)) {
819 try_async = false;
820 err = 0;
821 } else {
822 int fmode = ceph_flags_to_mode(flags);
823
824 mask = MAY_READ;
825 if (fmode & CEPH_FILE_MODE_WR)
826 mask |= MAY_WRITE;
827 err = ceph_mds_check_access(mdsc, path, mask);
828 }
829 ceph_mdsc_free_path(path, pathlen);
830 dput(dn);
831
832 /* For none EACCES cases will let the MDS do the mds auth check */
833 if (err == -EACCES) {
834 return err;
835 } else if (err < 0) {
836 try_async = false;
837 err = 0;
838 }
839 }
840
841 retry:
842 if (flags & O_CREAT) {
843 if (ceph_quota_is_max_files_exceeded(dir))
844 return -EDQUOT;
845
846 new_inode = ceph_new_inode(dir, dentry, &mode, &as_ctx);
847 if (IS_ERR(new_inode)) {
848 err = PTR_ERR(new_inode);
849 goto out_ctx;
850 }
851 /* Async create can't handle more than a page of xattrs */
852 if (as_ctx.pagelist &&
853 !list_is_singular(&as_ctx.pagelist->head))
854 try_async = false;
855 } else if (!d_in_lookup(dentry)) {
856 /* If it's not being looked up, it's negative */
857 return -ENOENT;
858 }
859
860 /* do the open */
861 req = prepare_open_request(dir->i_sb, flags, mode);
862 if (IS_ERR(req)) {
863 err = PTR_ERR(req);
864 goto out_ctx;
865 }
866 req->r_dentry = dget(dentry);
867 req->r_num_caps = 2;
868 mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
869 if (ceph_security_xattr_wanted(dir))
870 mask |= CEPH_CAP_XATTR_SHARED;
871 req->r_args.open.mask = cpu_to_le32(mask);
872 req->r_parent = dir;
873 if (req->r_op == CEPH_MDS_OP_CREATE)
874 req->r_mnt_idmap = mnt_idmap_get(idmap);
875 ihold(dir);
876 if (IS_ENCRYPTED(dir)) {
877 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags);
878 err = fscrypt_prepare_lookup_partial(dir, dentry);
879 if (err < 0)
880 goto out_req;
881 }
882
883 if (flags & O_CREAT) {
884 struct ceph_file_layout lo;
885
886 req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL |
887 CEPH_CAP_XATTR_EXCL;
888 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
889
890 ceph_as_ctx_to_req(req, &as_ctx);
891
892 if (try_async && (req->r_dir_caps =
893 try_prep_async_create(dir, dentry, &lo,
894 &req->r_deleg_ino))) {
895 struct ceph_vino vino = { .ino = req->r_deleg_ino,
896 .snap = CEPH_NOSNAP };
897 struct ceph_dentry_info *di = ceph_dentry(dentry);
898
899 set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
900 req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL);
901 req->r_callback = ceph_async_create_cb;
902
903 /* Hash inode before RPC */
904 new_inode = ceph_get_inode(dir->i_sb, vino, new_inode);
905 if (IS_ERR(new_inode)) {
906 err = PTR_ERR(new_inode);
907 new_inode = NULL;
908 goto out_req;
909 }
910 WARN_ON_ONCE(!(new_inode->i_state & I_NEW));
911
912 spin_lock(&dentry->d_lock);
913 di->flags |= CEPH_DENTRY_ASYNC_CREATE;
914 spin_unlock(&dentry->d_lock);
915
916 err = ceph_mdsc_submit_request(mdsc, dir, req);
917 if (!err) {
918 err = ceph_finish_async_create(dir, new_inode,
919 dentry, file,
920 mode, req,
921 &as_ctx, &lo);
922 new_inode = NULL;
923 } else if (err == -EJUKEBOX) {
924 restore_deleg_ino(dir, req->r_deleg_ino);
925 ceph_mdsc_put_request(req);
926 discard_new_inode(new_inode);
927 ceph_release_acl_sec_ctx(&as_ctx);
928 memset(&as_ctx, 0, sizeof(as_ctx));
929 new_inode = NULL;
930 try_async = false;
931 ceph_put_string(rcu_dereference_raw(lo.pool_ns));
932 goto retry;
933 }
934 ceph_put_string(rcu_dereference_raw(lo.pool_ns));
935 goto out_req;
936 }
937 }
938
939 set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
940 req->r_new_inode = new_inode;
941 new_inode = NULL;
942 err = ceph_mdsc_do_request(mdsc, (flags & O_CREAT) ? dir : NULL, req);
943 if (err == -ENOENT) {
944 dentry = ceph_handle_snapdir(req, dentry);
945 if (IS_ERR(dentry)) {
946 err = PTR_ERR(dentry);
947 goto out_req;
948 }
949 err = 0;
950 }
951
952 if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
953 err = ceph_handle_notrace_create(dir, dentry);
954
955 if (d_in_lookup(dentry)) {
956 dn = ceph_finish_lookup(req, dentry, err);
957 if (IS_ERR(dn))
958 err = PTR_ERR(dn);
959 } else {
960 /* we were given a hashed negative dentry */
961 dn = NULL;
962 }
963 if (err)
964 goto out_req;
965 if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
966 /* make vfs retry on splice, ENOENT, or symlink */
967 doutc(cl, "finish_no_open on dn %p\n", dn);
968 err = finish_no_open(file, dn);
969 } else {
970 if (IS_ENCRYPTED(dir) &&
971 !fscrypt_has_permitted_context(dir, d_inode(dentry))) {
972 pr_warn_client(cl,
973 "Inconsistent encryption context (parent %llx:%llx child %llx:%llx)\n",
974 ceph_vinop(dir), ceph_vinop(d_inode(dentry)));
975 goto out_req;
976 }
977
978 doutc(cl, "finish_open on dn %p\n", dn);
979 if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
980 struct inode *newino = d_inode(dentry);
981
982 cache_file_layout(dir, newino);
983 ceph_init_inode_acls(newino, &as_ctx);
984 file->f_mode |= FMODE_CREATED;
985 }
986 err = finish_open(file, dentry, ceph_open);
987 }
988 out_req:
989 ceph_mdsc_put_request(req);
990 iput(new_inode);
991 out_ctx:
992 ceph_release_acl_sec_ctx(&as_ctx);
993 doutc(cl, "result=%d\n", err);
994 return err;
995 }
996
997 int ceph_release(struct inode *inode, struct file *file)
998 {
999 struct ceph_client *cl = ceph_inode_to_client(inode);
1000 struct ceph_inode_info *ci = ceph_inode(inode);
1001
1002 if (S_ISDIR(inode->i_mode)) {
1003 struct ceph_dir_file_info *dfi = file->private_data;
1004 doutc(cl, "%p %llx.%llx dir file %p\n", inode,
1005 ceph_vinop(inode), file);
1006 WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
1007
1008 ceph_put_fmode(ci, dfi->file_info.fmode, 1);
1009
1010 if (dfi->last_readdir)
1011 ceph_mdsc_put_request(dfi->last_readdir);
1012 kfree(dfi->last_name);
1013 kfree(dfi->dir_info);
1014 kmem_cache_free(ceph_dir_file_cachep, dfi);
1015 } else {
1016 struct ceph_file_info *fi = file->private_data;
1017 doutc(cl, "%p %llx.%llx regular file %p\n", inode,
1018 ceph_vinop(inode), file);
1019 WARN_ON(!list_empty(&fi->rw_contexts));
1020
1021 ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE);
1022 ceph_put_fmode(ci, fi->fmode, 1);
1023
1024 kmem_cache_free(ceph_file_cachep, fi);
1025 }
1026
1027 /* wake up anyone waiting for caps on this inode */
1028 wake_up_all(&ci->i_cap_wq);
1029 return 0;
1030 }
1031
1032 enum {
1033 HAVE_RETRIED = 1,
1034 CHECK_EOF = 2,
1035 READ_INLINE = 3,
1036 };
1037
1038 /*
1039 * Completely synchronous read and write methods. Direct from __user
1040 * buffer to osd, or directly to user pages (if O_DIRECT).
1041 *
1042 * If the read spans object boundary, just do multiple reads. (That's not
1043 * atomic, but good enough for now.)
1044 *
1045 * If we get a short result from the OSD, check against i_size; we need to
1046 * only return a short read to the caller if we hit EOF.
1047 */
1048 ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos,
1049 struct iov_iter *to, int *retry_op,
1050 u64 *last_objver)
1051 {
1052 struct ceph_inode_info *ci = ceph_inode(inode);
1053 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
1054 struct ceph_client *cl = fsc->client;
1055 struct ceph_osd_client *osdc = &fsc->client->osdc;
1056 ssize_t ret;
1057 u64 off = *ki_pos;
1058 u64 len = iov_iter_count(to);
1059 u64 i_size = i_size_read(inode);
1060 bool sparse = IS_ENCRYPTED(inode) || ceph_test_mount_opt(fsc, SPARSEREAD);
1061 u64 objver = 0;
1062
1063 doutc(cl, "on inode %p %llx.%llx %llx~%llx\n", inode,
1064 ceph_vinop(inode), *ki_pos, len);
1065
1066 if (ceph_inode_is_shutdown(inode))
1067 return -EIO;
1068
1069 if (!len)
1070 return 0;
1071 /*
1072 * flush any page cache pages in this range. this
1073 * will make concurrent normal and sync io slow,
1074 * but it will at least behave sensibly when they are
1075 * in sequence.
1076 */
1077 ret = filemap_write_and_wait_range(inode->i_mapping,
1078 off, off + len - 1);
1079 if (ret < 0)
1080 return ret;
1081
1082 ret = 0;
1083 while ((len = iov_iter_count(to)) > 0) {
1084 struct ceph_osd_request *req;
1085 struct page **pages;
1086 int num_pages;
1087 size_t page_off;
1088 bool more;
1089 int idx;
1090 size_t left;
1091 struct ceph_osd_req_op *op;
1092 u64 read_off = off;
1093 u64 read_len = len;
1094 int extent_cnt;
1095
1096 /* determine new offset/length if encrypted */
1097 ceph_fscrypt_adjust_off_and_len(inode, &read_off, &read_len);
1098
1099 doutc(cl, "orig %llu~%llu reading %llu~%llu", off, len,
1100 read_off, read_len);
1101
1102 req = ceph_osdc_new_request(osdc, &ci->i_layout,
1103 ci->i_vino, read_off, &read_len, 0, 1,
1104 sparse ? CEPH_OSD_OP_SPARSE_READ :
1105 CEPH_OSD_OP_READ,
1106 CEPH_OSD_FLAG_READ,
1107 NULL, ci->i_truncate_seq,
1108 ci->i_truncate_size, false);
1109 if (IS_ERR(req)) {
1110 ret = PTR_ERR(req);
1111 break;
1112 }
1113
1114 /* adjust len downward if the request truncated the len */
1115 if (off + len > read_off + read_len)
1116 len = read_off + read_len - off;
1117 more = len < iov_iter_count(to);
1118
1119 num_pages = calc_pages_for(read_off, read_len);
1120 page_off = offset_in_page(off);
1121 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1122 if (IS_ERR(pages)) {
1123 ceph_osdc_put_request(req);
1124 ret = PTR_ERR(pages);
1125 break;
1126 }
1127
1128 osd_req_op_extent_osd_data_pages(req, 0, pages, read_len,
1129 offset_in_page(read_off),
1130 false, false);
1131
1132 op = &req->r_ops[0];
1133 if (sparse) {
1134 extent_cnt = __ceph_sparse_read_ext_count(inode, read_len);
1135 ret = ceph_alloc_sparse_ext_map(op, extent_cnt);
1136 if (ret) {
1137 ceph_osdc_put_request(req);
1138 break;
1139 }
1140 }
1141
1142 ceph_osdc_start_request(osdc, req);
1143 ret = ceph_osdc_wait_request(osdc, req);
1144
1145 ceph_update_read_metrics(&fsc->mdsc->metric,
1146 req->r_start_latency,
1147 req->r_end_latency,
1148 read_len, ret);
1149
1150 if (ret > 0)
1151 objver = req->r_version;
1152
1153 i_size = i_size_read(inode);
1154 doutc(cl, "%llu~%llu got %zd i_size %llu%s\n", off, len,
1155 ret, i_size, (more ? " MORE" : ""));
1156
1157 /* Fix it to go to end of extent map */
1158 if (sparse && ret >= 0)
1159 ret = ceph_sparse_ext_map_end(op);
1160 else if (ret == -ENOENT)
1161 ret = 0;
1162
1163 if (ret > 0 && IS_ENCRYPTED(inode)) {
1164 int fret;
1165
1166 fret = ceph_fscrypt_decrypt_extents(inode, pages,
1167 read_off, op->extent.sparse_ext,
1168 op->extent.sparse_ext_cnt);
1169 if (fret < 0) {
1170 ret = fret;
1171 ceph_osdc_put_request(req);
1172 break;
1173 }
1174
1175 /* account for any partial block at the beginning */
1176 fret -= (off - read_off);
1177
1178 /*
1179 * Short read after big offset adjustment?
1180 * Nothing is usable, just call it a zero
1181 * len read.
1182 */
1183 fret = max(fret, 0);
1184
1185 /* account for partial block at the end */
1186 ret = min_t(ssize_t, fret, len);
1187 }
1188
1189 ceph_osdc_put_request(req);
1190
1191 /* Short read but not EOF? Zero out the remainder. */
1192 if (ret >= 0 && ret < len && (off + ret < i_size)) {
1193 int zlen = min(len - ret, i_size - off - ret);
1194 int zoff = page_off + ret;
1195
1196 doutc(cl, "zero gap %llu~%llu\n", off + ret,
1197 off + ret + zlen);
1198 ceph_zero_page_vector_range(zoff, zlen, pages);
1199 ret += zlen;
1200 }
1201
1202 idx = 0;
1203 if (ret <= 0)
1204 left = 0;
1205 else if (off + ret > i_size)
1206 left = i_size - off;
1207 else
1208 left = ret;
1209 while (left > 0) {
1210 size_t plen, copied;
1211
1212 plen = min_t(size_t, left, PAGE_SIZE - page_off);
1213 SetPageUptodate(pages[idx]);
1214 copied = copy_page_to_iter(pages[idx++],
1215 page_off, plen, to);
1216 off += copied;
1217 left -= copied;
1218 page_off = 0;
1219 if (copied < plen) {
1220 ret = -EFAULT;
1221 break;
1222 }
1223 }
1224 ceph_release_page_vector(pages, num_pages);
1225
1226 if (ret < 0) {
1227 if (ret == -EBLOCKLISTED)
1228 fsc->blocklisted = true;
1229 break;
1230 }
1231
1232 if (off >= i_size || !more)
1233 break;
1234 }
1235
1236 if (ret > 0) {
1237 if (off >= i_size) {
1238 *retry_op = CHECK_EOF;
1239 ret = i_size - *ki_pos;
1240 *ki_pos = i_size;
1241 } else {
1242 ret = off - *ki_pos;
1243 *ki_pos = off;
1244 }
1245
1246 if (last_objver)
1247 *last_objver = objver;
1248 }
1249 doutc(cl, "result %zd retry_op %d\n", ret, *retry_op);
1250 return ret;
1251 }
1252
1253 static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
1254 int *retry_op)
1255 {
1256 struct file *file = iocb->ki_filp;
1257 struct inode *inode = file_inode(file);
1258 struct ceph_client *cl = ceph_inode_to_client(inode);
1259
1260 doutc(cl, "on file %p %llx~%zx %s\n", file, iocb->ki_pos,
1261 iov_iter_count(to),
1262 (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
1263
1264 return __ceph_sync_read(inode, &iocb->ki_pos, to, retry_op, NULL);
1265 }
1266
1267 struct ceph_aio_request {
1268 struct kiocb *iocb;
1269 size_t total_len;
1270 bool write;
1271 bool should_dirty;
1272 int error;
1273 struct list_head osd_reqs;
1274 unsigned num_reqs;
1275 atomic_t pending_reqs;
1276 struct timespec64 mtime;
1277 struct ceph_cap_flush *prealloc_cf;
1278 };
1279
1280 struct ceph_aio_work {
1281 struct work_struct work;
1282 struct ceph_osd_request *req;
1283 };
1284
1285 static void ceph_aio_retry_work(struct work_struct *work);
1286
1287 static void ceph_aio_complete(struct inode *inode,
1288 struct ceph_aio_request *aio_req)
1289 {
1290 struct ceph_client *cl = ceph_inode_to_client(inode);
1291 struct ceph_inode_info *ci = ceph_inode(inode);
1292 int ret;
1293
1294 if (!atomic_dec_and_test(&aio_req->pending_reqs))
1295 return;
1296
1297 if (aio_req->iocb->ki_flags & IOCB_DIRECT)
1298 inode_dio_end(inode);
1299
1300 ret = aio_req->error;
1301 if (!ret)
1302 ret = aio_req->total_len;
1303
1304 doutc(cl, "%p %llx.%llx rc %d\n", inode, ceph_vinop(inode), ret);
1305
1306 if (ret >= 0 && aio_req->write) {
1307 int dirty;
1308
1309 loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
1310 if (endoff > i_size_read(inode)) {
1311 if (ceph_inode_set_size(inode, endoff))
1312 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY);
1313 }
1314
1315 spin_lock(&ci->i_ceph_lock);
1316 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1317 &aio_req->prealloc_cf);
1318 spin_unlock(&ci->i_ceph_lock);
1319 if (dirty)
1320 __mark_inode_dirty(inode, dirty);
1321
1322 }
1323
1324 ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
1325 CEPH_CAP_FILE_RD));
1326
1327 aio_req->iocb->ki_complete(aio_req->iocb, ret);
1328
1329 ceph_free_cap_flush(aio_req->prealloc_cf);
1330 kfree(aio_req);
1331 }
1332
1333 static void ceph_aio_complete_req(struct ceph_osd_request *req)
1334 {
1335 int rc = req->r_result;
1336 struct inode *inode = req->r_inode;
1337 struct ceph_aio_request *aio_req = req->r_priv;
1338 struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
1339 struct ceph_osd_req_op *op = &req->r_ops[0];
1340 struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric;
1341 unsigned int len = osd_data->bvec_pos.iter.bi_size;
1342 bool sparse = (op->op == CEPH_OSD_OP_SPARSE_READ);
1343 struct ceph_client *cl = ceph_inode_to_client(inode);
1344
1345 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS);
1346 BUG_ON(!osd_data->num_bvecs);
1347
1348 doutc(cl, "req %p inode %p %llx.%llx, rc %d bytes %u\n", req,
1349 inode, ceph_vinop(inode), rc, len);
1350
1351 if (rc == -EOLDSNAPC) {
1352 struct ceph_aio_work *aio_work;
1353 BUG_ON(!aio_req->write);
1354
1355 aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS);
1356 if (aio_work) {
1357 INIT_WORK(&aio_work->work, ceph_aio_retry_work);
1358 aio_work->req = req;
1359 queue_work(ceph_inode_to_fs_client(inode)->inode_wq,
1360 &aio_work->work);
1361 return;
1362 }
1363 rc = -ENOMEM;
1364 } else if (!aio_req->write) {
1365 if (sparse && rc >= 0)
1366 rc = ceph_sparse_ext_map_end(op);
1367 if (rc == -ENOENT)
1368 rc = 0;
1369 if (rc >= 0 && len > rc) {
1370 struct iov_iter i;
1371 int zlen = len - rc;
1372
1373 /*
1374 * If read is satisfied by single OSD request,
1375 * it can pass EOF. Otherwise read is within
1376 * i_size.
1377 */
1378 if (aio_req->num_reqs == 1) {
1379 loff_t i_size = i_size_read(inode);
1380 loff_t endoff = aio_req->iocb->ki_pos + rc;
1381 if (endoff < i_size)
1382 zlen = min_t(size_t, zlen,
1383 i_size - endoff);
1384 aio_req->total_len = rc + zlen;
1385 }
1386
1387 iov_iter_bvec(&i, ITER_DEST, osd_data->bvec_pos.bvecs,
1388 osd_data->num_bvecs, len);
1389 iov_iter_advance(&i, rc);
1390 iov_iter_zero(zlen, &i);
1391 }
1392 }
1393
1394 /* r_start_latency == 0 means the request was not submitted */
1395 if (req->r_start_latency) {
1396 if (aio_req->write)
1397 ceph_update_write_metrics(metric, req->r_start_latency,
1398 req->r_end_latency, len, rc);
1399 else
1400 ceph_update_read_metrics(metric, req->r_start_latency,
1401 req->r_end_latency, len, rc);
1402 }
1403
1404 put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
1405 aio_req->should_dirty);
1406 ceph_osdc_put_request(req);
1407
1408 if (rc < 0)
1409 cmpxchg(&aio_req->error, 0, rc);
1410
1411 ceph_aio_complete(inode, aio_req);
1412 return;
1413 }
1414
1415 static void ceph_aio_retry_work(struct work_struct *work)
1416 {
1417 struct ceph_aio_work *aio_work =
1418 container_of(work, struct ceph_aio_work, work);
1419 struct ceph_osd_request *orig_req = aio_work->req;
1420 struct ceph_aio_request *aio_req = orig_req->r_priv;
1421 struct inode *inode = orig_req->r_inode;
1422 struct ceph_inode_info *ci = ceph_inode(inode);
1423 struct ceph_snap_context *snapc;
1424 struct ceph_osd_request *req;
1425 int ret;
1426
1427 spin_lock(&ci->i_ceph_lock);
1428 if (__ceph_have_pending_cap_snap(ci)) {
1429 struct ceph_cap_snap *capsnap =
1430 list_last_entry(&ci->i_cap_snaps,
1431 struct ceph_cap_snap,
1432 ci_item);
1433 snapc = ceph_get_snap_context(capsnap->context);
1434 } else {
1435 BUG_ON(!ci->i_head_snapc);
1436 snapc = ceph_get_snap_context(ci->i_head_snapc);
1437 }
1438 spin_unlock(&ci->i_ceph_lock);
1439
1440 req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1,
1441 false, GFP_NOFS);
1442 if (!req) {
1443 ret = -ENOMEM;
1444 req = orig_req;
1445 goto out;
1446 }
1447
1448 req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1449 ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc);
1450 ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid);
1451
1452 req->r_ops[0] = orig_req->r_ops[0];
1453
1454 req->r_mtime = aio_req->mtime;
1455 req->r_data_offset = req->r_ops[0].extent.offset;
1456
1457 ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
1458 if (ret) {
1459 ceph_osdc_put_request(req);
1460 req = orig_req;
1461 goto out;
1462 }
1463
1464 ceph_osdc_put_request(orig_req);
1465
1466 req->r_callback = ceph_aio_complete_req;
1467 req->r_inode = inode;
1468 req->r_priv = aio_req;
1469
1470 ceph_osdc_start_request(req->r_osdc, req);
1471 out:
1472 if (ret < 0) {
1473 req->r_result = ret;
1474 ceph_aio_complete_req(req);
1475 }
1476
1477 ceph_put_snap_context(snapc);
1478 kfree(aio_work);
1479 }
1480
1481 static ssize_t
1482 ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
1483 struct ceph_snap_context *snapc,
1484 struct ceph_cap_flush **pcf)
1485 {
1486 struct file *file = iocb->ki_filp;
1487 struct inode *inode = file_inode(file);
1488 struct ceph_inode_info *ci = ceph_inode(inode);
1489 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
1490 struct ceph_client *cl = fsc->client;
1491 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1492 struct ceph_vino vino;
1493 struct ceph_osd_request *req;
1494 struct bio_vec *bvecs;
1495 struct ceph_aio_request *aio_req = NULL;
1496 int num_pages = 0;
1497 int flags;
1498 int ret = 0;
1499 struct timespec64 mtime = current_time(inode);
1500 size_t count = iov_iter_count(iter);
1501 loff_t pos = iocb->ki_pos;
1502 bool write = iov_iter_rw(iter) == WRITE;
1503 bool should_dirty = !write && user_backed_iter(iter);
1504 bool sparse = ceph_test_mount_opt(fsc, SPARSEREAD);
1505
1506 if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1507 return -EROFS;
1508
1509 doutc(cl, "sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
1510 (write ? "write" : "read"), file, pos, (unsigned)count,
1511 snapc, snapc ? snapc->seq : 0);
1512
1513 if (write) {
1514 int ret2;
1515
1516 ceph_fscache_invalidate(inode, true);
1517
1518 ret2 = invalidate_inode_pages2_range(inode->i_mapping,
1519 pos >> PAGE_SHIFT,
1520 (pos + count - 1) >> PAGE_SHIFT);
1521 if (ret2 < 0)
1522 doutc(cl, "invalidate_inode_pages2_range returned %d\n",
1523 ret2);
1524
1525 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1526 } else {
1527 flags = CEPH_OSD_FLAG_READ;
1528 }
1529
1530 while (iov_iter_count(iter) > 0) {
1531 u64 size = iov_iter_count(iter);
1532 ssize_t len;
1533 struct ceph_osd_req_op *op;
1534 int readop = sparse ? CEPH_OSD_OP_SPARSE_READ : CEPH_OSD_OP_READ;
1535 int extent_cnt;
1536
1537 if (write)
1538 size = min_t(u64, size, fsc->mount_options->wsize);
1539 else
1540 size = min_t(u64, size, fsc->mount_options->rsize);
1541
1542 vino = ceph_vino(inode);
1543 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1544 vino, pos, &size, 0,
1545 1,
1546 write ? CEPH_OSD_OP_WRITE : readop,
1547 flags, snapc,
1548 ci->i_truncate_seq,
1549 ci->i_truncate_size,
1550 false);
1551 if (IS_ERR(req)) {
1552 ret = PTR_ERR(req);
1553 break;
1554 }
1555
1556 len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages);
1557 if (len < 0) {
1558 ceph_osdc_put_request(req);
1559 ret = len;
1560 break;
1561 }
1562 if (len != size)
1563 osd_req_op_extent_update(req, 0, len);
1564
1565 /*
1566 * To simplify error handling, allow AIO when IO within i_size
1567 * or IO can be satisfied by single OSD request.
1568 */
1569 if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) &&
1570 (len == count || pos + count <= i_size_read(inode))) {
1571 aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL);
1572 if (aio_req) {
1573 aio_req->iocb = iocb;
1574 aio_req->write = write;
1575 aio_req->should_dirty = should_dirty;
1576 INIT_LIST_HEAD(&aio_req->osd_reqs);
1577 if (write) {
1578 aio_req->mtime = mtime;
1579 swap(aio_req->prealloc_cf, *pcf);
1580 }
1581 }
1582 /* ignore error */
1583 }
1584
1585 if (write) {
1586 /*
1587 * throw out any page cache pages in this range. this
1588 * may block.
1589 */
1590 truncate_inode_pages_range(inode->i_mapping, pos,
1591 PAGE_ALIGN(pos + len) - 1);
1592
1593 req->r_mtime = mtime;
1594 }
1595
1596 osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
1597 op = &req->r_ops[0];
1598 if (sparse) {
1599 extent_cnt = __ceph_sparse_read_ext_count(inode, size);
1600 ret = ceph_alloc_sparse_ext_map(op, extent_cnt);
1601 if (ret) {
1602 ceph_osdc_put_request(req);
1603 break;
1604 }
1605 }
1606
1607 if (aio_req) {
1608 aio_req->total_len += len;
1609 aio_req->num_reqs++;
1610 atomic_inc(&aio_req->pending_reqs);
1611
1612 req->r_callback = ceph_aio_complete_req;
1613 req->r_inode = inode;
1614 req->r_priv = aio_req;
1615 list_add_tail(&req->r_private_item, &aio_req->osd_reqs);
1616
1617 pos += len;
1618 continue;
1619 }
1620
1621 ceph_osdc_start_request(req->r_osdc, req);
1622 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1623
1624 if (write)
1625 ceph_update_write_metrics(metric, req->r_start_latency,
1626 req->r_end_latency, len, ret);
1627 else
1628 ceph_update_read_metrics(metric, req->r_start_latency,
1629 req->r_end_latency, len, ret);
1630
1631 size = i_size_read(inode);
1632 if (!write) {
1633 if (sparse && ret >= 0)
1634 ret = ceph_sparse_ext_map_end(op);
1635 else if (ret == -ENOENT)
1636 ret = 0;
1637
1638 if (ret >= 0 && ret < len && pos + ret < size) {
1639 struct iov_iter i;
1640 int zlen = min_t(size_t, len - ret,
1641 size - pos - ret);
1642
1643 iov_iter_bvec(&i, ITER_DEST, bvecs, num_pages, len);
1644 iov_iter_advance(&i, ret);
1645 iov_iter_zero(zlen, &i);
1646 ret += zlen;
1647 }
1648 if (ret >= 0)
1649 len = ret;
1650 }
1651
1652 put_bvecs(bvecs, num_pages, should_dirty);
1653 ceph_osdc_put_request(req);
1654 if (ret < 0)
1655 break;
1656
1657 pos += len;
1658 if (!write && pos >= size)
1659 break;
1660
1661 if (write && pos > size) {
1662 if (ceph_inode_set_size(inode, pos))
1663 ceph_check_caps(ceph_inode(inode),
1664 CHECK_CAPS_AUTHONLY);
1665 }
1666 }
1667
1668 if (aio_req) {
1669 LIST_HEAD(osd_reqs);
1670
1671 if (aio_req->num_reqs == 0) {
1672 kfree(aio_req);
1673 return ret;
1674 }
1675
1676 ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR :
1677 CEPH_CAP_FILE_RD);
1678
1679 list_splice(&aio_req->osd_reqs, &osd_reqs);
1680 inode_dio_begin(inode);
1681 while (!list_empty(&osd_reqs)) {
1682 req = list_first_entry(&osd_reqs,
1683 struct ceph_osd_request,
1684 r_private_item);
1685 list_del_init(&req->r_private_item);
1686 if (ret >= 0)
1687 ceph_osdc_start_request(req->r_osdc, req);
1688 if (ret < 0) {
1689 req->r_result = ret;
1690 ceph_aio_complete_req(req);
1691 }
1692 }
1693 return -EIOCBQUEUED;
1694 }
1695
1696 if (ret != -EOLDSNAPC && pos > iocb->ki_pos) {
1697 ret = pos - iocb->ki_pos;
1698 iocb->ki_pos = pos;
1699 }
1700 return ret;
1701 }
1702
1703 /*
1704 * Synchronous write, straight from __user pointer or user pages.
1705 *
1706 * If write spans object boundary, just do multiple writes. (For a
1707 * correct atomic write, we should e.g. take write locks on all
1708 * objects, rollback on failure, etc.)
1709 */
1710 static ssize_t
1711 ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
1712 struct ceph_snap_context *snapc)
1713 {
1714 struct file *file = iocb->ki_filp;
1715 struct inode *inode = file_inode(file);
1716 struct ceph_inode_info *ci = ceph_inode(inode);
1717 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
1718 struct ceph_client *cl = fsc->client;
1719 struct ceph_osd_client *osdc = &fsc->client->osdc;
1720 struct ceph_osd_request *req;
1721 struct page **pages;
1722 u64 len;
1723 int num_pages;
1724 int written = 0;
1725 int ret;
1726 bool check_caps = false;
1727 struct timespec64 mtime = current_time(inode);
1728 size_t count = iov_iter_count(from);
1729
1730 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1731 return -EROFS;
1732
1733 doutc(cl, "on file %p %lld~%u snapc %p seq %lld\n", file, pos,
1734 (unsigned)count, snapc, snapc->seq);
1735
1736 ret = filemap_write_and_wait_range(inode->i_mapping,
1737 pos, pos + count - 1);
1738 if (ret < 0)
1739 return ret;
1740
1741 ceph_fscache_invalidate(inode, false);
1742
1743 while ((len = iov_iter_count(from)) > 0) {
1744 size_t left;
1745 int n;
1746 u64 write_pos = pos;
1747 u64 write_len = len;
1748 u64 objnum, objoff;
1749 u32 xlen;
1750 u64 assert_ver = 0;
1751 bool rmw;
1752 bool first, last;
1753 struct iov_iter saved_iter = *from;
1754 size_t off;
1755
1756 ceph_fscrypt_adjust_off_and_len(inode, &write_pos, &write_len);
1757
1758 /* clamp the length to the end of first object */
1759 ceph_calc_file_object_mapping(&ci->i_layout, write_pos,
1760 write_len, &objnum, &objoff,
1761 &xlen);
1762 write_len = xlen;
1763
1764 /* adjust len downward if it goes beyond current object */
1765 if (pos + len > write_pos + write_len)
1766 len = write_pos + write_len - pos;
1767
1768 /*
1769 * If we had to adjust the length or position to align with a
1770 * crypto block, then we must do a read/modify/write cycle. We
1771 * use a version assertion to redrive the thing if something
1772 * changes in between.
1773 */
1774 first = pos != write_pos;
1775 last = (pos + len) != (write_pos + write_len);
1776 rmw = first || last;
1777
1778 doutc(cl, "ino %llx %lld~%llu adjusted %lld~%llu -- %srmw\n",
1779 ci->i_vino.ino, pos, len, write_pos, write_len,
1780 rmw ? "" : "no ");
1781
1782 /*
1783 * The data is emplaced into the page as it would be if it were
1784 * in an array of pagecache pages.
1785 */
1786 num_pages = calc_pages_for(write_pos, write_len);
1787 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1788 if (IS_ERR(pages)) {
1789 ret = PTR_ERR(pages);
1790 break;
1791 }
1792
1793 /* Do we need to preload the pages? */
1794 if (rmw) {
1795 u64 first_pos = write_pos;
1796 u64 last_pos = (write_pos + write_len) - CEPH_FSCRYPT_BLOCK_SIZE;
1797 u64 read_len = CEPH_FSCRYPT_BLOCK_SIZE;
1798 struct ceph_osd_req_op *op;
1799
1800 /* We should only need to do this for encrypted inodes */
1801 WARN_ON_ONCE(!IS_ENCRYPTED(inode));
1802
1803 /* No need to do two reads if first and last blocks are same */
1804 if (first && last_pos == first_pos)
1805 last = false;
1806
1807 /*
1808 * Allocate a read request for one or two extents,
1809 * depending on how the request was aligned.
1810 */
1811 req = ceph_osdc_new_request(osdc, &ci->i_layout,
1812 ci->i_vino, first ? first_pos : last_pos,
1813 &read_len, 0, (first && last) ? 2 : 1,
1814 CEPH_OSD_OP_SPARSE_READ, CEPH_OSD_FLAG_READ,
1815 NULL, ci->i_truncate_seq,
1816 ci->i_truncate_size, false);
1817 if (IS_ERR(req)) {
1818 ceph_release_page_vector(pages, num_pages);
1819 ret = PTR_ERR(req);
1820 break;
1821 }
1822
1823 /* Something is misaligned! */
1824 if (read_len != CEPH_FSCRYPT_BLOCK_SIZE) {
1825 ceph_osdc_put_request(req);
1826 ceph_release_page_vector(pages, num_pages);
1827 ret = -EIO;
1828 break;
1829 }
1830
1831 /* Add extent for first block? */
1832 op = &req->r_ops[0];
1833
1834 if (first) {
1835 osd_req_op_extent_osd_data_pages(req, 0, pages,
1836 CEPH_FSCRYPT_BLOCK_SIZE,
1837 offset_in_page(first_pos),
1838 false, false);
1839 /* We only expect a single extent here */
1840 ret = __ceph_alloc_sparse_ext_map(op, 1);
1841 if (ret) {
1842 ceph_osdc_put_request(req);
1843 ceph_release_page_vector(pages, num_pages);
1844 break;
1845 }
1846 }
1847
1848 /* Add extent for last block */
1849 if (last) {
1850 /* Init the other extent if first extent has been used */
1851 if (first) {
1852 op = &req->r_ops[1];
1853 osd_req_op_extent_init(req, 1,
1854 CEPH_OSD_OP_SPARSE_READ,
1855 last_pos, CEPH_FSCRYPT_BLOCK_SIZE,
1856 ci->i_truncate_size,
1857 ci->i_truncate_seq);
1858 }
1859
1860 ret = __ceph_alloc_sparse_ext_map(op, 1);
1861 if (ret) {
1862 ceph_osdc_put_request(req);
1863 ceph_release_page_vector(pages, num_pages);
1864 break;
1865 }
1866
1867 osd_req_op_extent_osd_data_pages(req, first ? 1 : 0,
1868 &pages[num_pages - 1],
1869 CEPH_FSCRYPT_BLOCK_SIZE,
1870 offset_in_page(last_pos),
1871 false, false);
1872 }
1873
1874 ceph_osdc_start_request(osdc, req);
1875 ret = ceph_osdc_wait_request(osdc, req);
1876
1877 /* FIXME: length field is wrong if there are 2 extents */
1878 ceph_update_read_metrics(&fsc->mdsc->metric,
1879 req->r_start_latency,
1880 req->r_end_latency,
1881 read_len, ret);
1882
1883 /* Ok if object is not already present */
1884 if (ret == -ENOENT) {
1885 /*
1886 * If there is no object, then we can't assert
1887 * on its version. Set it to 0, and we'll use an
1888 * exclusive create instead.
1889 */
1890 ceph_osdc_put_request(req);
1891 ret = 0;
1892
1893 /*
1894 * zero out the soon-to-be uncopied parts of the
1895 * first and last pages.
1896 */
1897 if (first)
1898 zero_user_segment(pages[0], 0,
1899 offset_in_page(first_pos));
1900 if (last)
1901 zero_user_segment(pages[num_pages - 1],
1902 offset_in_page(last_pos),
1903 PAGE_SIZE);
1904 } else {
1905 if (ret < 0) {
1906 ceph_osdc_put_request(req);
1907 ceph_release_page_vector(pages, num_pages);
1908 break;
1909 }
1910
1911 op = &req->r_ops[0];
1912 if (op->extent.sparse_ext_cnt == 0) {
1913 if (first)
1914 zero_user_segment(pages[0], 0,
1915 offset_in_page(first_pos));
1916 else
1917 zero_user_segment(pages[num_pages - 1],
1918 offset_in_page(last_pos),
1919 PAGE_SIZE);
1920 } else if (op->extent.sparse_ext_cnt != 1 ||
1921 ceph_sparse_ext_map_end(op) !=
1922 CEPH_FSCRYPT_BLOCK_SIZE) {
1923 ret = -EIO;
1924 ceph_osdc_put_request(req);
1925 ceph_release_page_vector(pages, num_pages);
1926 break;
1927 }
1928
1929 if (first && last) {
1930 op = &req->r_ops[1];
1931 if (op->extent.sparse_ext_cnt == 0) {
1932 zero_user_segment(pages[num_pages - 1],
1933 offset_in_page(last_pos),
1934 PAGE_SIZE);
1935 } else if (op->extent.sparse_ext_cnt != 1 ||
1936 ceph_sparse_ext_map_end(op) !=
1937 CEPH_FSCRYPT_BLOCK_SIZE) {
1938 ret = -EIO;
1939 ceph_osdc_put_request(req);
1940 ceph_release_page_vector(pages, num_pages);
1941 break;
1942 }
1943 }
1944
1945 /* Grab assert version. It must be non-zero. */
1946 assert_ver = req->r_version;
1947 WARN_ON_ONCE(ret > 0 && assert_ver == 0);
1948
1949 ceph_osdc_put_request(req);
1950 if (first) {
1951 ret = ceph_fscrypt_decrypt_block_inplace(inode,
1952 pages[0], CEPH_FSCRYPT_BLOCK_SIZE,
1953 offset_in_page(first_pos),
1954 first_pos >> CEPH_FSCRYPT_BLOCK_SHIFT);
1955 if (ret < 0) {
1956 ceph_release_page_vector(pages, num_pages);
1957 break;
1958 }
1959 }
1960 if (last) {
1961 ret = ceph_fscrypt_decrypt_block_inplace(inode,
1962 pages[num_pages - 1],
1963 CEPH_FSCRYPT_BLOCK_SIZE,
1964 offset_in_page(last_pos),
1965 last_pos >> CEPH_FSCRYPT_BLOCK_SHIFT);
1966 if (ret < 0) {
1967 ceph_release_page_vector(pages, num_pages);
1968 break;
1969 }
1970 }
1971 }
1972 }
1973
1974 left = len;
1975 off = offset_in_page(pos);
1976 for (n = 0; n < num_pages; n++) {
1977 size_t plen = min_t(size_t, left, PAGE_SIZE - off);
1978
1979 /* copy the data */
1980 ret = copy_page_from_iter(pages[n], off, plen, from);
1981 if (ret != plen) {
1982 ret = -EFAULT;
1983 break;
1984 }
1985 off = 0;
1986 left -= ret;
1987 }
1988 if (ret < 0) {
1989 doutc(cl, "write failed with %d\n", ret);
1990 ceph_release_page_vector(pages, num_pages);
1991 break;
1992 }
1993
1994 if (IS_ENCRYPTED(inode)) {
1995 ret = ceph_fscrypt_encrypt_pages(inode, pages,
1996 write_pos, write_len,
1997 GFP_KERNEL);
1998 if (ret < 0) {
1999 doutc(cl, "encryption failed with %d\n", ret);
2000 ceph_release_page_vector(pages, num_pages);
2001 break;
2002 }
2003 }
2004
2005 req = ceph_osdc_new_request(osdc, &ci->i_layout,
2006 ci->i_vino, write_pos, &write_len,
2007 rmw ? 1 : 0, rmw ? 2 : 1,
2008 CEPH_OSD_OP_WRITE,
2009 CEPH_OSD_FLAG_WRITE,
2010 snapc, ci->i_truncate_seq,
2011 ci->i_truncate_size, false);
2012 if (IS_ERR(req)) {
2013 ret = PTR_ERR(req);
2014 ceph_release_page_vector(pages, num_pages);
2015 break;
2016 }
2017
2018 doutc(cl, "write op %lld~%llu\n", write_pos, write_len);
2019 osd_req_op_extent_osd_data_pages(req, rmw ? 1 : 0, pages, write_len,
2020 offset_in_page(write_pos), false,
2021 true);
2022 req->r_inode = inode;
2023 req->r_mtime = mtime;
2024
2025 /* Set up the assertion */
2026 if (rmw) {
2027 /*
2028 * Set up the assertion. If we don't have a version
2029 * number, then the object doesn't exist yet. Use an
2030 * exclusive create instead of a version assertion in
2031 * that case.
2032 */
2033 if (assert_ver) {
2034 osd_req_op_init(req, 0, CEPH_OSD_OP_ASSERT_VER, 0);
2035 req->r_ops[0].assert_ver.ver = assert_ver;
2036 } else {
2037 osd_req_op_init(req, 0, CEPH_OSD_OP_CREATE,
2038 CEPH_OSD_OP_FLAG_EXCL);
2039 }
2040 }
2041
2042 ceph_osdc_start_request(osdc, req);
2043 ret = ceph_osdc_wait_request(osdc, req);
2044
2045 ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
2046 req->r_end_latency, len, ret);
2047 ceph_osdc_put_request(req);
2048 if (ret != 0) {
2049 doutc(cl, "osd write returned %d\n", ret);
2050 /* Version changed! Must re-do the rmw cycle */
2051 if ((assert_ver && (ret == -ERANGE || ret == -EOVERFLOW)) ||
2052 (!assert_ver && ret == -EEXIST)) {
2053 /* We should only ever see this on a rmw */
2054 WARN_ON_ONCE(!rmw);
2055
2056 /* The version should never go backward */
2057 WARN_ON_ONCE(ret == -EOVERFLOW);
2058
2059 *from = saved_iter;
2060
2061 /* FIXME: limit number of times we loop? */
2062 continue;
2063 }
2064 ceph_set_error_write(ci);
2065 break;
2066 }
2067
2068 ceph_clear_error_write(ci);
2069
2070 /*
2071 * We successfully wrote to a range of the file. Declare
2072 * that region of the pagecache invalid.
2073 */
2074 ret = invalidate_inode_pages2_range(
2075 inode->i_mapping,
2076 pos >> PAGE_SHIFT,
2077 (pos + len - 1) >> PAGE_SHIFT);
2078 if (ret < 0) {
2079 doutc(cl, "invalidate_inode_pages2_range returned %d\n",
2080 ret);
2081 ret = 0;
2082 }
2083 pos += len;
2084 written += len;
2085 doutc(cl, "written %d\n", written);
2086 if (pos > i_size_read(inode)) {
2087 check_caps = ceph_inode_set_size(inode, pos);
2088 if (check_caps)
2089 ceph_check_caps(ceph_inode(inode),
2090 CHECK_CAPS_AUTHONLY);
2091 }
2092
2093 }
2094
2095 if (ret != -EOLDSNAPC && written > 0) {
2096 ret = written;
2097 iocb->ki_pos = pos;
2098 }
2099 doutc(cl, "returning %d\n", ret);
2100 return ret;
2101 }
2102
2103 /*
2104 * Wrap generic_file_aio_read with checks for cap bits on the inode.
2105 * Atomically grab references, so that those bits are not released
2106 * back to the MDS mid-read.
2107 *
2108 * Hmm, the sync read case isn't actually async... should it be?
2109 */
2110 static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
2111 {
2112 struct file *filp = iocb->ki_filp;
2113 struct ceph_file_info *fi = filp->private_data;
2114 size_t len = iov_iter_count(to);
2115 struct inode *inode = file_inode(filp);
2116 struct ceph_inode_info *ci = ceph_inode(inode);
2117 bool direct_lock = iocb->ki_flags & IOCB_DIRECT;
2118 struct ceph_client *cl = ceph_inode_to_client(inode);
2119 ssize_t ret;
2120 int want = 0, got = 0;
2121 int retry_op = 0, read = 0;
2122
2123 again:
2124 doutc(cl, "%llu~%u trying to get caps on %p %llx.%llx\n",
2125 iocb->ki_pos, (unsigned)len, inode, ceph_vinop(inode));
2126
2127 if (ceph_inode_is_shutdown(inode))
2128 return -ESTALE;
2129
2130 if (direct_lock)
2131 ceph_start_io_direct(inode);
2132 else
2133 ceph_start_io_read(inode);
2134
2135 if (!(fi->flags & CEPH_F_SYNC) && !direct_lock)
2136 want |= CEPH_CAP_FILE_CACHE;
2137 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2138 want |= CEPH_CAP_FILE_LAZYIO;
2139
2140 ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got);
2141 if (ret < 0) {
2142 if (direct_lock)
2143 ceph_end_io_direct(inode);
2144 else
2145 ceph_end_io_read(inode);
2146 return ret;
2147 }
2148
2149 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
2150 (iocb->ki_flags & IOCB_DIRECT) ||
2151 (fi->flags & CEPH_F_SYNC)) {
2152
2153 doutc(cl, "sync %p %llx.%llx %llu~%u got cap refs on %s\n",
2154 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
2155 ceph_cap_string(got));
2156
2157 if (!ceph_has_inline_data(ci)) {
2158 if (!retry_op &&
2159 (iocb->ki_flags & IOCB_DIRECT) &&
2160 !IS_ENCRYPTED(inode)) {
2161 ret = ceph_direct_read_write(iocb, to,
2162 NULL, NULL);
2163 if (ret >= 0 && ret < len)
2164 retry_op = CHECK_EOF;
2165 } else {
2166 ret = ceph_sync_read(iocb, to, &retry_op);
2167 }
2168 } else {
2169 retry_op = READ_INLINE;
2170 }
2171 } else {
2172 CEPH_DEFINE_RW_CONTEXT(rw_ctx, got);
2173 doutc(cl, "async %p %llx.%llx %llu~%u got cap refs on %s\n",
2174 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
2175 ceph_cap_string(got));
2176 ceph_add_rw_context(fi, &rw_ctx);
2177 ret = generic_file_read_iter(iocb, to);
2178 ceph_del_rw_context(fi, &rw_ctx);
2179 }
2180
2181 doutc(cl, "%p %llx.%llx dropping cap refs on %s = %d\n",
2182 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
2183 ceph_put_cap_refs(ci, got);
2184
2185 if (direct_lock)
2186 ceph_end_io_direct(inode);
2187 else
2188 ceph_end_io_read(inode);
2189
2190 if (retry_op > HAVE_RETRIED && ret >= 0) {
2191 int statret;
2192 struct page *page = NULL;
2193 loff_t i_size;
2194 int mask = CEPH_STAT_CAP_SIZE;
2195 if (retry_op == READ_INLINE) {
2196 page = __page_cache_alloc(GFP_KERNEL);
2197 if (!page)
2198 return -ENOMEM;
2199
2200 mask = CEPH_STAT_CAP_INLINE_DATA;
2201 }
2202
2203 statret = __ceph_do_getattr(inode, page, mask, !!page);
2204 if (statret < 0) {
2205 if (page)
2206 __free_page(page);
2207 if (statret == -ENODATA) {
2208 BUG_ON(retry_op != READ_INLINE);
2209 goto again;
2210 }
2211 return statret;
2212 }
2213
2214 i_size = i_size_read(inode);
2215 if (retry_op == READ_INLINE) {
2216 BUG_ON(ret > 0 || read > 0);
2217 if (iocb->ki_pos < i_size &&
2218 iocb->ki_pos < PAGE_SIZE) {
2219 loff_t end = min_t(loff_t, i_size,
2220 iocb->ki_pos + len);
2221 end = min_t(loff_t, end, PAGE_SIZE);
2222 if (statret < end)
2223 zero_user_segment(page, statret, end);
2224 ret = copy_page_to_iter(page,
2225 iocb->ki_pos & ~PAGE_MASK,
2226 end - iocb->ki_pos, to);
2227 iocb->ki_pos += ret;
2228 read += ret;
2229 }
2230 if (iocb->ki_pos < i_size && read < len) {
2231 size_t zlen = min_t(size_t, len - read,
2232 i_size - iocb->ki_pos);
2233 ret = iov_iter_zero(zlen, to);
2234 iocb->ki_pos += ret;
2235 read += ret;
2236 }
2237 __free_pages(page, 0);
2238 return read;
2239 }
2240
2241 /* hit EOF or hole? */
2242 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
2243 ret < len) {
2244 doutc(cl, "may hit hole, ppos %lld < size %lld, reading more\n",
2245 iocb->ki_pos, i_size);
2246
2247 read += ret;
2248 len -= ret;
2249 retry_op = HAVE_RETRIED;
2250 goto again;
2251 }
2252 }
2253
2254 if (ret >= 0)
2255 ret += read;
2256
2257 return ret;
2258 }
2259
2260 /*
2261 * Wrap filemap_splice_read with checks for cap bits on the inode.
2262 * Atomically grab references, so that those bits are not released
2263 * back to the MDS mid-read.
2264 */
2265 static ssize_t ceph_splice_read(struct file *in, loff_t *ppos,
2266 struct pipe_inode_info *pipe,
2267 size_t len, unsigned int flags)
2268 {
2269 struct ceph_file_info *fi = in->private_data;
2270 struct inode *inode = file_inode(in);
2271 struct ceph_inode_info *ci = ceph_inode(inode);
2272 ssize_t ret;
2273 int want = 0, got = 0;
2274 CEPH_DEFINE_RW_CONTEXT(rw_ctx, 0);
2275
2276 dout("splice_read %p %llx.%llx %llu~%zu trying to get caps on %p\n",
2277 inode, ceph_vinop(inode), *ppos, len, inode);
2278
2279 if (ceph_inode_is_shutdown(inode))
2280 return -ESTALE;
2281
2282 if (ceph_has_inline_data(ci) ||
2283 (fi->flags & CEPH_F_SYNC))
2284 return copy_splice_read(in, ppos, pipe, len, flags);
2285
2286 ceph_start_io_read(inode);
2287
2288 want = CEPH_CAP_FILE_CACHE;
2289 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2290 want |= CEPH_CAP_FILE_LAZYIO;
2291
2292 ret = ceph_get_caps(in, CEPH_CAP_FILE_RD, want, -1, &got);
2293 if (ret < 0)
2294 goto out_end;
2295
2296 if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) == 0) {
2297 dout("splice_read/sync %p %llx.%llx %llu~%zu got cap refs on %s\n",
2298 inode, ceph_vinop(inode), *ppos, len,
2299 ceph_cap_string(got));
2300
2301 ceph_put_cap_refs(ci, got);
2302 ceph_end_io_read(inode);
2303 return copy_splice_read(in, ppos, pipe, len, flags);
2304 }
2305
2306 dout("splice_read %p %llx.%llx %llu~%zu got cap refs on %s\n",
2307 inode, ceph_vinop(inode), *ppos, len, ceph_cap_string(got));
2308
2309 rw_ctx.caps = got;
2310 ceph_add_rw_context(fi, &rw_ctx);
2311 ret = filemap_splice_read(in, ppos, pipe, len, flags);
2312 ceph_del_rw_context(fi, &rw_ctx);
2313
2314 dout("splice_read %p %llx.%llx dropping cap refs on %s = %zd\n",
2315 inode, ceph_vinop(inode), ceph_cap_string(got), ret);
2316
2317 ceph_put_cap_refs(ci, got);
2318 out_end:
2319 ceph_end_io_read(inode);
2320 return ret;
2321 }
2322
2323 /*
2324 * Take cap references to avoid releasing caps to MDS mid-write.
2325 *
2326 * If we are synchronous, and write with an old snap context, the OSD
2327 * may return EOLDSNAPC. In that case, retry the write.. _after_
2328 * dropping our cap refs and allowing the pending snap to logically
2329 * complete _before_ this write occurs.
2330 *
2331 * If we are near ENOSPC, write synchronously.
2332 */
2333 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
2334 {
2335 struct file *file = iocb->ki_filp;
2336 struct ceph_file_info *fi = file->private_data;
2337 struct inode *inode = file_inode(file);
2338 struct ceph_inode_info *ci = ceph_inode(inode);
2339 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
2340 struct ceph_client *cl = fsc->client;
2341 struct ceph_osd_client *osdc = &fsc->client->osdc;
2342 struct ceph_cap_flush *prealloc_cf;
2343 ssize_t count, written = 0;
2344 int err, want = 0, got;
2345 bool direct_lock = false;
2346 u32 map_flags;
2347 u64 pool_flags;
2348 loff_t pos;
2349 loff_t limit = max(i_size_read(inode), fsc->max_file_size);
2350
2351 if (ceph_inode_is_shutdown(inode))
2352 return -ESTALE;
2353
2354 if (ceph_snap(inode) != CEPH_NOSNAP)
2355 return -EROFS;
2356
2357 prealloc_cf = ceph_alloc_cap_flush();
2358 if (!prealloc_cf)
2359 return -ENOMEM;
2360
2361 if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT)
2362 direct_lock = true;
2363
2364 retry_snap:
2365 if (direct_lock)
2366 ceph_start_io_direct(inode);
2367 else
2368 ceph_start_io_write(inode);
2369
2370 if (iocb->ki_flags & IOCB_APPEND) {
2371 err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
2372 if (err < 0)
2373 goto out;
2374 }
2375
2376 err = generic_write_checks(iocb, from);
2377 if (err <= 0)
2378 goto out;
2379
2380 pos = iocb->ki_pos;
2381 if (unlikely(pos >= limit)) {
2382 err = -EFBIG;
2383 goto out;
2384 } else {
2385 iov_iter_truncate(from, limit - pos);
2386 }
2387
2388 count = iov_iter_count(from);
2389 if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
2390 err = -EDQUOT;
2391 goto out;
2392 }
2393
2394 down_read(&osdc->lock);
2395 map_flags = osdc->osdmap->flags;
2396 pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id);
2397 up_read(&osdc->lock);
2398 if ((map_flags & CEPH_OSDMAP_FULL) ||
2399 (pool_flags & CEPH_POOL_FLAG_FULL)) {
2400 err = -ENOSPC;
2401 goto out;
2402 }
2403
2404 err = file_remove_privs(file);
2405 if (err)
2406 goto out;
2407
2408 doutc(cl, "%p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
2409 inode, ceph_vinop(inode), pos, count,
2410 i_size_read(inode));
2411 if (!(fi->flags & CEPH_F_SYNC) && !direct_lock)
2412 want |= CEPH_CAP_FILE_BUFFER;
2413 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2414 want |= CEPH_CAP_FILE_LAZYIO;
2415 got = 0;
2416 err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got);
2417 if (err < 0)
2418 goto out;
2419
2420 err = file_update_time(file);
2421 if (err)
2422 goto out_caps;
2423
2424 inode_inc_iversion_raw(inode);
2425
2426 doutc(cl, "%p %llx.%llx %llu~%zd got cap refs on %s\n",
2427 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
2428
2429 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
2430 (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
2431 (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
2432 struct ceph_snap_context *snapc;
2433 struct iov_iter data;
2434
2435 spin_lock(&ci->i_ceph_lock);
2436 if (__ceph_have_pending_cap_snap(ci)) {
2437 struct ceph_cap_snap *capsnap =
2438 list_last_entry(&ci->i_cap_snaps,
2439 struct ceph_cap_snap,
2440 ci_item);
2441 snapc = ceph_get_snap_context(capsnap->context);
2442 } else {
2443 BUG_ON(!ci->i_head_snapc);
2444 snapc = ceph_get_snap_context(ci->i_head_snapc);
2445 }
2446 spin_unlock(&ci->i_ceph_lock);
2447
2448 /* we might need to revert back to that point */
2449 data = *from;
2450 if ((iocb->ki_flags & IOCB_DIRECT) && !IS_ENCRYPTED(inode))
2451 written = ceph_direct_read_write(iocb, &data, snapc,
2452 &prealloc_cf);
2453 else
2454 written = ceph_sync_write(iocb, &data, pos, snapc);
2455 if (direct_lock)
2456 ceph_end_io_direct(inode);
2457 else
2458 ceph_end_io_write(inode);
2459 if (written > 0)
2460 iov_iter_advance(from, written);
2461 ceph_put_snap_context(snapc);
2462 } else {
2463 /*
2464 * No need to acquire the i_truncate_mutex. Because
2465 * the MDS revokes Fwb caps before sending truncate
2466 * message to us. We can't get Fwb cap while there
2467 * are pending vmtruncate. So write and vmtruncate
2468 * can not run at the same time
2469 */
2470 written = generic_perform_write(iocb, from);
2471 ceph_end_io_write(inode);
2472 }
2473
2474 if (written >= 0) {
2475 int dirty;
2476
2477 spin_lock(&ci->i_ceph_lock);
2478 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2479 &prealloc_cf);
2480 spin_unlock(&ci->i_ceph_lock);
2481 if (dirty)
2482 __mark_inode_dirty(inode, dirty);
2483 if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
2484 ceph_check_caps(ci, CHECK_CAPS_FLUSH);
2485 }
2486
2487 doutc(cl, "%p %llx.%llx %llu~%u dropping cap refs on %s\n",
2488 inode, ceph_vinop(inode), pos, (unsigned)count,
2489 ceph_cap_string(got));
2490 ceph_put_cap_refs(ci, got);
2491
2492 if (written == -EOLDSNAPC) {
2493 doutc(cl, "%p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
2494 inode, ceph_vinop(inode), pos, (unsigned)count);
2495 goto retry_snap;
2496 }
2497
2498 if (written >= 0) {
2499 if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
2500 (pool_flags & CEPH_POOL_FLAG_NEARFULL))
2501 iocb->ki_flags |= IOCB_DSYNC;
2502 written = generic_write_sync(iocb, written);
2503 }
2504
2505 goto out_unlocked;
2506 out_caps:
2507 ceph_put_cap_refs(ci, got);
2508 out:
2509 if (direct_lock)
2510 ceph_end_io_direct(inode);
2511 else
2512 ceph_end_io_write(inode);
2513 out_unlocked:
2514 ceph_free_cap_flush(prealloc_cf);
2515 return written ? written : err;
2516 }
2517
2518 /*
2519 * llseek. be sure to verify file size on SEEK_END.
2520 */
2521 static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
2522 {
2523 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
2524 struct inode *inode = file_inode(file);
2525 int ret;
2526
2527 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
2528 if (ret < 0)
2529 return ret;
2530 }
2531 return generic_file_llseek(file, offset, whence);
2532 }
2533
2534 static inline void ceph_zero_partial_page(
2535 struct inode *inode, loff_t offset, unsigned size)
2536 {
2537 struct page *page;
2538 pgoff_t index = offset >> PAGE_SHIFT;
2539
2540 page = find_lock_page(inode->i_mapping, index);
2541 if (page) {
2542 wait_on_page_writeback(page);
2543 zero_user(page, offset & (PAGE_SIZE - 1), size);
2544 unlock_page(page);
2545 put_page(page);
2546 }
2547 }
2548
2549 static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
2550 loff_t length)
2551 {
2552 loff_t nearly = round_up(offset, PAGE_SIZE);
2553 if (offset < nearly) {
2554 loff_t size = nearly - offset;
2555 if (length < size)
2556 size = length;
2557 ceph_zero_partial_page(inode, offset, size);
2558 offset += size;
2559 length -= size;
2560 }
2561 if (length >= PAGE_SIZE) {
2562 loff_t size = round_down(length, PAGE_SIZE);
2563 truncate_pagecache_range(inode, offset, offset + size - 1);
2564 offset += size;
2565 length -= size;
2566 }
2567 if (length)
2568 ceph_zero_partial_page(inode, offset, length);
2569 }
2570
2571 static int ceph_zero_partial_object(struct inode *inode,
2572 loff_t offset, loff_t *length)
2573 {
2574 struct ceph_inode_info *ci = ceph_inode(inode);
2575 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
2576 struct ceph_osd_request *req;
2577 int ret = 0;
2578 loff_t zero = 0;
2579 int op;
2580
2581 if (ceph_inode_is_shutdown(inode))
2582 return -EIO;
2583
2584 if (!length) {
2585 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
2586 length = &zero;
2587 } else {
2588 op = CEPH_OSD_OP_ZERO;
2589 }
2590
2591 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
2592 ceph_vino(inode),
2593 offset, length,
2594 0, 1, op,
2595 CEPH_OSD_FLAG_WRITE,
2596 NULL, 0, 0, false);
2597 if (IS_ERR(req)) {
2598 ret = PTR_ERR(req);
2599 goto out;
2600 }
2601
2602 req->r_mtime = inode_get_mtime(inode);
2603 ceph_osdc_start_request(&fsc->client->osdc, req);
2604 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
2605 if (ret == -ENOENT)
2606 ret = 0;
2607 ceph_osdc_put_request(req);
2608
2609 out:
2610 return ret;
2611 }
2612
2613 static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
2614 {
2615 int ret = 0;
2616 struct ceph_inode_info *ci = ceph_inode(inode);
2617 s32 stripe_unit = ci->i_layout.stripe_unit;
2618 s32 stripe_count = ci->i_layout.stripe_count;
2619 s32 object_size = ci->i_layout.object_size;
2620 u64 object_set_size = object_size * stripe_count;
2621 u64 nearly, t;
2622
2623 /* round offset up to next period boundary */
2624 nearly = offset + object_set_size - 1;
2625 t = nearly;
2626 nearly -= do_div(t, object_set_size);
2627
2628 while (length && offset < nearly) {
2629 loff_t size = length;
2630 ret = ceph_zero_partial_object(inode, offset, &size);
2631 if (ret < 0)
2632 return ret;
2633 offset += size;
2634 length -= size;
2635 }
2636 while (length >= object_set_size) {
2637 int i;
2638 loff_t pos = offset;
2639 for (i = 0; i < stripe_count; ++i) {
2640 ret = ceph_zero_partial_object(inode, pos, NULL);
2641 if (ret < 0)
2642 return ret;
2643 pos += stripe_unit;
2644 }
2645 offset += object_set_size;
2646 length -= object_set_size;
2647 }
2648 while (length) {
2649 loff_t size = length;
2650 ret = ceph_zero_partial_object(inode, offset, &size);
2651 if (ret < 0)
2652 return ret;
2653 offset += size;
2654 length -= size;
2655 }
2656 return ret;
2657 }
2658
2659 static long ceph_fallocate(struct file *file, int mode,
2660 loff_t offset, loff_t length)
2661 {
2662 struct ceph_file_info *fi = file->private_data;
2663 struct inode *inode = file_inode(file);
2664 struct ceph_inode_info *ci = ceph_inode(inode);
2665 struct ceph_cap_flush *prealloc_cf;
2666 struct ceph_client *cl = ceph_inode_to_client(inode);
2667 int want, got = 0;
2668 int dirty;
2669 int ret = 0;
2670 loff_t endoff = 0;
2671 loff_t size;
2672
2673 doutc(cl, "%p %llx.%llx mode %x, offset %llu length %llu\n",
2674 inode, ceph_vinop(inode), mode, offset, length);
2675
2676 if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2677 return -EOPNOTSUPP;
2678
2679 if (!S_ISREG(inode->i_mode))
2680 return -EOPNOTSUPP;
2681
2682 if (IS_ENCRYPTED(inode))
2683 return -EOPNOTSUPP;
2684
2685 prealloc_cf = ceph_alloc_cap_flush();
2686 if (!prealloc_cf)
2687 return -ENOMEM;
2688
2689 inode_lock(inode);
2690
2691 if (ceph_snap(inode) != CEPH_NOSNAP) {
2692 ret = -EROFS;
2693 goto unlock;
2694 }
2695
2696 size = i_size_read(inode);
2697
2698 /* Are we punching a hole beyond EOF? */
2699 if (offset >= size)
2700 goto unlock;
2701 if ((offset + length) > size)
2702 length = size - offset;
2703
2704 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2705 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
2706 else
2707 want = CEPH_CAP_FILE_BUFFER;
2708
2709 ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got);
2710 if (ret < 0)
2711 goto unlock;
2712
2713 ret = file_modified(file);
2714 if (ret)
2715 goto put_caps;
2716
2717 filemap_invalidate_lock(inode->i_mapping);
2718 ceph_fscache_invalidate(inode, false);
2719 ceph_zero_pagecache_range(inode, offset, length);
2720 ret = ceph_zero_objects(inode, offset, length);
2721
2722 if (!ret) {
2723 spin_lock(&ci->i_ceph_lock);
2724 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2725 &prealloc_cf);
2726 spin_unlock(&ci->i_ceph_lock);
2727 if (dirty)
2728 __mark_inode_dirty(inode, dirty);
2729 }
2730 filemap_invalidate_unlock(inode->i_mapping);
2731
2732 put_caps:
2733 ceph_put_cap_refs(ci, got);
2734 unlock:
2735 inode_unlock(inode);
2736 ceph_free_cap_flush(prealloc_cf);
2737 return ret;
2738 }
2739
2740 /*
2741 * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for
2742 * src_ci. Two attempts are made to obtain both caps, and an error is return if
2743 * this fails; zero is returned on success.
2744 */
2745 static int get_rd_wr_caps(struct file *src_filp, int *src_got,
2746 struct file *dst_filp,
2747 loff_t dst_endoff, int *dst_got)
2748 {
2749 int ret = 0;
2750 bool retrying = false;
2751
2752 retry_caps:
2753 ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
2754 dst_endoff, dst_got);
2755 if (ret < 0)
2756 return ret;
2757
2758 /*
2759 * Since we're already holding the FILE_WR capability for the dst file,
2760 * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some
2761 * retry dance instead to try to get both capabilities.
2762 */
2763 ret = ceph_try_get_caps(file_inode(src_filp),
2764 CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED,
2765 false, src_got);
2766 if (ret <= 0) {
2767 /* Start by dropping dst_ci caps and getting src_ci caps */
2768 ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got);
2769 if (retrying) {
2770 if (!ret)
2771 /* ceph_try_get_caps masks EAGAIN */
2772 ret = -EAGAIN;
2773 return ret;
2774 }
2775 ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD,
2776 CEPH_CAP_FILE_SHARED, -1, src_got);
2777 if (ret < 0)
2778 return ret;
2779 /*... drop src_ci caps too, and retry */
2780 ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got);
2781 retrying = true;
2782 goto retry_caps;
2783 }
2784 return ret;
2785 }
2786
2787 static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got,
2788 struct ceph_inode_info *dst_ci, int dst_got)
2789 {
2790 ceph_put_cap_refs(src_ci, src_got);
2791 ceph_put_cap_refs(dst_ci, dst_got);
2792 }
2793
2794 /*
2795 * This function does several size-related checks, returning an error if:
2796 * - source file is smaller than off+len
2797 * - destination file size is not OK (inode_newsize_ok())
2798 * - max bytes quotas is exceeded
2799 */
2800 static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
2801 loff_t src_off, loff_t dst_off, size_t len)
2802 {
2803 struct ceph_client *cl = ceph_inode_to_client(src_inode);
2804 loff_t size, endoff;
2805
2806 size = i_size_read(src_inode);
2807 /*
2808 * Don't copy beyond source file EOF. Instead of simply setting length
2809 * to (size - src_off), just drop to VFS default implementation, as the
2810 * local i_size may be stale due to other clients writing to the source
2811 * inode.
2812 */
2813 if (src_off + len > size) {
2814 doutc(cl, "Copy beyond EOF (%llu + %zu > %llu)\n", src_off,
2815 len, size);
2816 return -EOPNOTSUPP;
2817 }
2818 size = i_size_read(dst_inode);
2819
2820 endoff = dst_off + len;
2821 if (inode_newsize_ok(dst_inode, endoff))
2822 return -EOPNOTSUPP;
2823
2824 if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff))
2825 return -EDQUOT;
2826
2827 return 0;
2828 }
2829
2830 static struct ceph_osd_request *
2831 ceph_alloc_copyfrom_request(struct ceph_osd_client *osdc,
2832 u64 src_snapid,
2833 struct ceph_object_id *src_oid,
2834 struct ceph_object_locator *src_oloc,
2835 struct ceph_object_id *dst_oid,
2836 struct ceph_object_locator *dst_oloc,
2837 u32 truncate_seq, u64 truncate_size)
2838 {
2839 struct ceph_osd_request *req;
2840 int ret;
2841 u32 src_fadvise_flags =
2842 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2843 CEPH_OSD_OP_FLAG_FADVISE_NOCACHE;
2844 u32 dst_fadvise_flags =
2845 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2846 CEPH_OSD_OP_FLAG_FADVISE_DONTNEED;
2847
2848 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
2849 if (!req)
2850 return ERR_PTR(-ENOMEM);
2851
2852 req->r_flags = CEPH_OSD_FLAG_WRITE;
2853
2854 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
2855 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
2856
2857 ret = osd_req_op_copy_from_init(req, src_snapid, 0,
2858 src_oid, src_oloc,
2859 src_fadvise_flags,
2860 dst_fadvise_flags,
2861 truncate_seq,
2862 truncate_size,
2863 CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
2864 if (ret)
2865 goto out;
2866
2867 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
2868 if (ret)
2869 goto out;
2870
2871 return req;
2872
2873 out:
2874 ceph_osdc_put_request(req);
2875 return ERR_PTR(ret);
2876 }
2877
2878 static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
2879 struct ceph_inode_info *dst_ci, u64 *dst_off,
2880 struct ceph_fs_client *fsc,
2881 size_t len, unsigned int flags)
2882 {
2883 struct ceph_object_locator src_oloc, dst_oloc;
2884 struct ceph_object_id src_oid, dst_oid;
2885 struct ceph_osd_client *osdc;
2886 struct ceph_osd_request *req;
2887 size_t bytes = 0;
2888 u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
2889 u32 src_objlen, dst_objlen;
2890 u32 object_size = src_ci->i_layout.object_size;
2891 struct ceph_client *cl = fsc->client;
2892 int ret;
2893
2894 src_oloc.pool = src_ci->i_layout.pool_id;
2895 src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
2896 dst_oloc.pool = dst_ci->i_layout.pool_id;
2897 dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
2898 osdc = &fsc->client->osdc;
2899
2900 while (len >= object_size) {
2901 ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
2902 object_size, &src_objnum,
2903 &src_objoff, &src_objlen);
2904 ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
2905 object_size, &dst_objnum,
2906 &dst_objoff, &dst_objlen);
2907 ceph_oid_init(&src_oid);
2908 ceph_oid_printf(&src_oid, "%llx.%08llx",
2909 src_ci->i_vino.ino, src_objnum);
2910 ceph_oid_init(&dst_oid);
2911 ceph_oid_printf(&dst_oid, "%llx.%08llx",
2912 dst_ci->i_vino.ino, dst_objnum);
2913 /* Do an object remote copy */
2914 req = ceph_alloc_copyfrom_request(osdc, src_ci->i_vino.snap,
2915 &src_oid, &src_oloc,
2916 &dst_oid, &dst_oloc,
2917 dst_ci->i_truncate_seq,
2918 dst_ci->i_truncate_size);
2919 if (IS_ERR(req))
2920 ret = PTR_ERR(req);
2921 else {
2922 ceph_osdc_start_request(osdc, req);
2923 ret = ceph_osdc_wait_request(osdc, req);
2924 ceph_update_copyfrom_metrics(&fsc->mdsc->metric,
2925 req->r_start_latency,
2926 req->r_end_latency,
2927 object_size, ret);
2928 ceph_osdc_put_request(req);
2929 }
2930 if (ret) {
2931 if (ret == -EOPNOTSUPP) {
2932 fsc->have_copy_from2 = false;
2933 pr_notice_client(cl,
2934 "OSDs don't support copy-from2; disabling copy offload\n");
2935 }
2936 doutc(cl, "returned %d\n", ret);
2937 if (!bytes)
2938 bytes = ret;
2939 goto out;
2940 }
2941 len -= object_size;
2942 bytes += object_size;
2943 *src_off += object_size;
2944 *dst_off += object_size;
2945 }
2946
2947 out:
2948 ceph_oloc_destroy(&src_oloc);
2949 ceph_oloc_destroy(&dst_oloc);
2950 return bytes;
2951 }
2952
2953 static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
2954 struct file *dst_file, loff_t dst_off,
2955 size_t len, unsigned int flags)
2956 {
2957 struct inode *src_inode = file_inode(src_file);
2958 struct inode *dst_inode = file_inode(dst_file);
2959 struct ceph_inode_info *src_ci = ceph_inode(src_inode);
2960 struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
2961 struct ceph_cap_flush *prealloc_cf;
2962 struct ceph_fs_client *src_fsc = ceph_inode_to_fs_client(src_inode);
2963 struct ceph_client *cl = src_fsc->client;
2964 loff_t size;
2965 ssize_t ret = -EIO, bytes;
2966 u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
2967 u32 src_objlen, dst_objlen;
2968 int src_got = 0, dst_got = 0, err, dirty;
2969
2970 if (src_inode->i_sb != dst_inode->i_sb) {
2971 struct ceph_fs_client *dst_fsc = ceph_inode_to_fs_client(dst_inode);
2972
2973 if (ceph_fsid_compare(&src_fsc->client->fsid,
2974 &dst_fsc->client->fsid)) {
2975 dout("Copying files across clusters: src: %pU dst: %pU\n",
2976 &src_fsc->client->fsid, &dst_fsc->client->fsid);
2977 return -EXDEV;
2978 }
2979 }
2980 if (ceph_snap(dst_inode) != CEPH_NOSNAP)
2981 return -EROFS;
2982
2983 /*
2984 * Some of the checks below will return -EOPNOTSUPP, which will force a
2985 * fallback to the default VFS copy_file_range implementation. This is
2986 * desirable in several cases (for ex, the 'len' is smaller than the
2987 * size of the objects, or in cases where that would be more
2988 * efficient).
2989 */
2990
2991 if (ceph_test_mount_opt(src_fsc, NOCOPYFROM))
2992 return -EOPNOTSUPP;
2993
2994 if (!src_fsc->have_copy_from2)
2995 return -EOPNOTSUPP;
2996
2997 /*
2998 * Striped file layouts require that we copy partial objects, but the
2999 * OSD copy-from operation only supports full-object copies. Limit
3000 * this to non-striped file layouts for now.
3001 */
3002 if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) ||
3003 (src_ci->i_layout.stripe_count != 1) ||
3004 (dst_ci->i_layout.stripe_count != 1) ||
3005 (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) {
3006 doutc(cl, "Invalid src/dst files layout\n");
3007 return -EOPNOTSUPP;
3008 }
3009
3010 /* Every encrypted inode gets its own key, so we can't offload them */
3011 if (IS_ENCRYPTED(src_inode) || IS_ENCRYPTED(dst_inode))
3012 return -EOPNOTSUPP;
3013
3014 if (len < src_ci->i_layout.object_size)
3015 return -EOPNOTSUPP; /* no remote copy will be done */
3016
3017 prealloc_cf = ceph_alloc_cap_flush();
3018 if (!prealloc_cf)
3019 return -ENOMEM;
3020
3021 /* Start by sync'ing the source and destination files */
3022 ret = file_write_and_wait_range(src_file, src_off, (src_off + len));
3023 if (ret < 0) {
3024 doutc(cl, "failed to write src file (%zd)\n", ret);
3025 goto out;
3026 }
3027 ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len));
3028 if (ret < 0) {
3029 doutc(cl, "failed to write dst file (%zd)\n", ret);
3030 goto out;
3031 }
3032
3033 /*
3034 * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other
3035 * clients may have dirty data in their caches. And OSDs know nothing
3036 * about caps, so they can't safely do the remote object copies.
3037 */
3038 err = get_rd_wr_caps(src_file, &src_got,
3039 dst_file, (dst_off + len), &dst_got);
3040 if (err < 0) {
3041 doutc(cl, "get_rd_wr_caps returned %d\n", err);
3042 ret = -EOPNOTSUPP;
3043 goto out;
3044 }
3045
3046 ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len);
3047 if (ret < 0)
3048 goto out_caps;
3049
3050 /* Drop dst file cached pages */
3051 ceph_fscache_invalidate(dst_inode, false);
3052 ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
3053 dst_off >> PAGE_SHIFT,
3054 (dst_off + len) >> PAGE_SHIFT);
3055 if (ret < 0) {
3056 doutc(cl, "Failed to invalidate inode pages (%zd)\n",
3057 ret);
3058 ret = 0; /* XXX */
3059 }
3060 ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
3061 src_ci->i_layout.object_size,
3062 &src_objnum, &src_objoff, &src_objlen);
3063 ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
3064 dst_ci->i_layout.object_size,
3065 &dst_objnum, &dst_objoff, &dst_objlen);
3066 /* object-level offsets need to the same */
3067 if (src_objoff != dst_objoff) {
3068 ret = -EOPNOTSUPP;
3069 goto out_caps;
3070 }
3071
3072 /*
3073 * Do a manual copy if the object offset isn't object aligned.
3074 * 'src_objlen' contains the bytes left until the end of the object,
3075 * starting at the src_off
3076 */
3077 if (src_objoff) {
3078 doutc(cl, "Initial partial copy of %u bytes\n", src_objlen);
3079
3080 /*
3081 * we need to temporarily drop all caps as we'll be calling
3082 * {read,write}_iter, which will get caps again.
3083 */
3084 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
3085 ret = splice_file_range(src_file, &src_off, dst_file, &dst_off,
3086 src_objlen);
3087 /* Abort on short copies or on error */
3088 if (ret < (long)src_objlen) {
3089 doutc(cl, "Failed partial copy (%zd)\n", ret);
3090 goto out;
3091 }
3092 len -= ret;
3093 err = get_rd_wr_caps(src_file, &src_got,
3094 dst_file, (dst_off + len), &dst_got);
3095 if (err < 0)
3096 goto out;
3097 err = is_file_size_ok(src_inode, dst_inode,
3098 src_off, dst_off, len);
3099 if (err < 0)
3100 goto out_caps;
3101 }
3102
3103 size = i_size_read(dst_inode);
3104 bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
3105 src_fsc, len, flags);
3106 if (bytes <= 0) {
3107 if (!ret)
3108 ret = bytes;
3109 goto out_caps;
3110 }
3111 doutc(cl, "Copied %zu bytes out of %zu\n", bytes, len);
3112 len -= bytes;
3113 ret += bytes;
3114
3115 file_update_time(dst_file);
3116 inode_inc_iversion_raw(dst_inode);
3117
3118 if (dst_off > size) {
3119 /* Let the MDS know about dst file size change */
3120 if (ceph_inode_set_size(dst_inode, dst_off) ||
3121 ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
3122 ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY | CHECK_CAPS_FLUSH);
3123 }
3124 /* Mark Fw dirty */
3125 spin_lock(&dst_ci->i_ceph_lock);
3126 dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf);
3127 spin_unlock(&dst_ci->i_ceph_lock);
3128 if (dirty)
3129 __mark_inode_dirty(dst_inode, dirty);
3130
3131 out_caps:
3132 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
3133
3134 /*
3135 * Do the final manual copy if we still have some bytes left, unless
3136 * there were errors in remote object copies (len >= object_size).
3137 */
3138 if (len && (len < src_ci->i_layout.object_size)) {
3139 doutc(cl, "Final partial copy of %zu bytes\n", len);
3140 bytes = splice_file_range(src_file, &src_off, dst_file,
3141 &dst_off, len);
3142 if (bytes > 0)
3143 ret += bytes;
3144 else
3145 doutc(cl, "Failed partial copy (%zd)\n", bytes);
3146 }
3147
3148 out:
3149 ceph_free_cap_flush(prealloc_cf);
3150
3151 return ret;
3152 }
3153
3154 static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
3155 struct file *dst_file, loff_t dst_off,
3156 size_t len, unsigned int flags)
3157 {
3158 ssize_t ret;
3159
3160 ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
3161 len, flags);
3162
3163 if (ret == -EOPNOTSUPP || ret == -EXDEV)
3164 ret = splice_copy_file_range(src_file, src_off, dst_file,
3165 dst_off, len);
3166 return ret;
3167 }
3168
3169 const struct file_operations ceph_file_fops = {
3170 .open = ceph_open,
3171 .release = ceph_release,
3172 .llseek = ceph_llseek,
3173 .read_iter = ceph_read_iter,
3174 .write_iter = ceph_write_iter,
3175 .mmap = ceph_mmap,
3176 .fsync = ceph_fsync,
3177 .lock = ceph_lock,
3178 .setlease = simple_nosetlease,
3179 .flock = ceph_flock,
3180 .splice_read = ceph_splice_read,
3181 .splice_write = iter_file_splice_write,
3182 .unlocked_ioctl = ceph_ioctl,
3183 .compat_ioctl = compat_ptr_ioctl,
3184 .fallocate = ceph_fallocate,
3185 .copy_file_range = ceph_copy_file_range,
3186 };
3187
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