1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/ceph/striper.h>
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>
17 #include "mds_client.h"
22 static __le32 ceph_flags_sys2wire(u32 flags)
26 switch (flags & O_ACCMODE) {
28 wire_flags |= CEPH_O_RDONLY;
31 wire_flags |= CEPH_O_WRONLY;
34 wire_flags |= CEPH_O_RDWR;
40 #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
42 ceph_sys2wire(O_CREAT);
43 ceph_sys2wire(O_EXCL);
44 ceph_sys2wire(O_TRUNC);
45 ceph_sys2wire(O_DIRECTORY);
46 ceph_sys2wire(O_NOFOLLOW);
51 dout("unused open flags: %x\n", flags);
53 return cpu_to_le32(wire_flags);
57 * Ceph file operations
59 * Implement basic open/close functionality, and implement
62 * We implement three modes of file I/O:
63 * - buffered uses the generic_file_aio_{read,write} helpers
65 * - synchronous is used when there is multi-client read/write
66 * sharing, avoids the page cache, and synchronously waits for an
69 * - direct io takes the variant of the sync path that references
70 * user pages directly.
72 * fsync() flushes and waits on dirty pages, but just queues metadata
73 * for writeback: since the MDS can recover size and mtime there is no
74 * need to wait for MDS acknowledgement.
78 * How many pages to get in one call to iov_iter_get_pages(). This
79 * determines the size of the on-stack array used as a buffer.
81 #define ITER_GET_BVECS_PAGES 64
83 static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize,
84 struct bio_vec *bvecs)
89 if (maxsize > iov_iter_count(iter))
90 maxsize = iov_iter_count(iter);
92 while (size < maxsize) {
93 struct page *pages[ITER_GET_BVECS_PAGES];
98 bytes = iov_iter_get_pages(iter, pages, maxsize - size,
99 ITER_GET_BVECS_PAGES, &start);
101 return size ?: bytes;
103 iov_iter_advance(iter, bytes);
106 for ( ; bytes; idx++, bvec_idx++) {
107 struct bio_vec bv = {
108 .bv_page = pages[idx],
109 .bv_len = min_t(int, bytes, PAGE_SIZE - start),
113 bvecs[bvec_idx] = bv;
123 * iov_iter_get_pages() only considers one iov_iter segment, no matter
124 * what maxsize or maxpages are given. For ITER_BVEC that is a single
127 * Attempt to get up to @maxsize bytes worth of pages from @iter.
128 * Return the number of bytes in the created bio_vec array, or an error.
130 static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize,
131 struct bio_vec **bvecs, int *num_bvecs)
134 size_t orig_count = iov_iter_count(iter);
138 iov_iter_truncate(iter, maxsize);
139 npages = iov_iter_npages(iter, INT_MAX);
140 iov_iter_reexpand(iter, orig_count);
143 * __iter_get_bvecs() may populate only part of the array -- zero it
146 bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO);
150 bytes = __iter_get_bvecs(iter, maxsize, bv);
153 * No pages were pinned -- just free the array.
164 static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty)
168 for (i = 0; i < num_bvecs; i++) {
169 if (bvecs[i].bv_page) {
171 set_page_dirty_lock(bvecs[i].bv_page);
172 put_page(bvecs[i].bv_page);
179 * Prepare an open request. Preallocate ceph_cap to avoid an
180 * inopportune ENOMEM later.
182 static struct ceph_mds_request *
183 prepare_open_request(struct super_block *sb, int flags, int create_mode)
185 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb);
186 struct ceph_mds_request *req;
187 int want_auth = USE_ANY_MDS;
188 int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN;
190 if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC))
191 want_auth = USE_AUTH_MDS;
193 req = ceph_mdsc_create_request(mdsc, op, want_auth);
196 req->r_fmode = ceph_flags_to_mode(flags);
197 req->r_args.open.flags = ceph_flags_sys2wire(flags);
198 req->r_args.open.mode = cpu_to_le32(create_mode);
203 static int ceph_init_file_info(struct inode *inode, struct file *file,
204 int fmode, bool isdir)
206 struct ceph_inode_info *ci = ceph_inode(inode);
207 struct ceph_file_info *fi;
209 dout("%s %p %p 0%o (%s)\n", __func__, inode, file,
210 inode->i_mode, isdir ? "dir" : "regular");
211 BUG_ON(inode->i_fop->release != ceph_release);
214 struct ceph_dir_file_info *dfi =
215 kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
219 file->private_data = dfi;
220 fi = &dfi->file_info;
221 dfi->next_offset = 2;
222 dfi->readdir_cache_idx = -1;
224 fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
228 file->private_data = fi;
231 ceph_get_fmode(ci, fmode, 1);
234 spin_lock_init(&fi->rw_contexts_lock);
235 INIT_LIST_HEAD(&fi->rw_contexts);
236 fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen);
242 * initialize private struct file data.
243 * if we fail, clean up by dropping fmode reference on the ceph_inode
245 static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
249 switch (inode->i_mode & S_IFMT) {
251 ceph_fscache_register_inode_cookie(inode);
252 ceph_fscache_file_set_cookie(inode, file);
255 ret = ceph_init_file_info(inode, file, fmode,
256 S_ISDIR(inode->i_mode));
260 dout("init_file %p %p 0%o (symlink)\n", inode, file,
265 dout("init_file %p %p 0%o (special)\n", inode, file,
268 * we need to drop the open ref now, since we don't
269 * have .release set to ceph_release.
271 BUG_ON(inode->i_fop->release == ceph_release);
273 /* call the proper open fop */
274 ret = inode->i_fop->open(inode, file);
280 * try renew caps after session gets killed.
282 int ceph_renew_caps(struct inode *inode, int fmode)
284 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
285 struct ceph_inode_info *ci = ceph_inode(inode);
286 struct ceph_mds_request *req;
287 int err, flags, wanted;
289 spin_lock(&ci->i_ceph_lock);
290 __ceph_touch_fmode(ci, mdsc, fmode);
291 wanted = __ceph_caps_file_wanted(ci);
292 if (__ceph_is_any_real_caps(ci) &&
293 (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
294 int issued = __ceph_caps_issued(ci, NULL);
295 spin_unlock(&ci->i_ceph_lock);
296 dout("renew caps %p want %s issued %s updating mds_wanted\n",
297 inode, ceph_cap_string(wanted), ceph_cap_string(issued));
298 ceph_check_caps(ci, 0, NULL);
301 spin_unlock(&ci->i_ceph_lock);
304 if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
306 else if (wanted & CEPH_CAP_FILE_RD)
308 else if (wanted & CEPH_CAP_FILE_WR)
311 if (wanted & CEPH_CAP_FILE_LAZYIO)
315 req = prepare_open_request(inode->i_sb, flags, 0);
321 req->r_inode = inode;
325 err = ceph_mdsc_do_request(mdsc, NULL, req);
326 ceph_mdsc_put_request(req);
328 dout("renew caps %p open result=%d\n", inode, err);
329 return err < 0 ? err : 0;
333 * If we already have the requisite capabilities, we can satisfy
334 * the open request locally (no need to request new caps from the
335 * MDS). We do, however, need to inform the MDS (asynchronously)
336 * if our wanted caps set expands.
338 int ceph_open(struct inode *inode, struct file *file)
340 struct ceph_inode_info *ci = ceph_inode(inode);
341 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
342 struct ceph_mds_client *mdsc = fsc->mdsc;
343 struct ceph_mds_request *req;
344 struct ceph_file_info *fi = file->private_data;
346 int flags, fmode, wanted;
349 dout("open file %p is already opened\n", file);
353 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
354 flags = file->f_flags & ~(O_CREAT|O_EXCL);
355 if (S_ISDIR(inode->i_mode))
356 flags = O_DIRECTORY; /* mds likes to know */
358 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
359 ceph_vinop(inode), file, flags, file->f_flags);
360 fmode = ceph_flags_to_mode(flags);
361 wanted = ceph_caps_for_mode(fmode);
363 /* snapped files are read-only */
364 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
367 /* trivially open snapdir */
368 if (ceph_snap(inode) == CEPH_SNAPDIR) {
369 return ceph_init_file(inode, file, fmode);
373 * No need to block if we have caps on the auth MDS (for
374 * write) or any MDS (for read). Update wanted set
377 spin_lock(&ci->i_ceph_lock);
378 if (__ceph_is_any_real_caps(ci) &&
379 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
380 int mds_wanted = __ceph_caps_mds_wanted(ci, true);
381 int issued = __ceph_caps_issued(ci, NULL);
383 dout("open %p fmode %d want %s issued %s using existing\n",
384 inode, fmode, ceph_cap_string(wanted),
385 ceph_cap_string(issued));
386 __ceph_touch_fmode(ci, mdsc, fmode);
387 spin_unlock(&ci->i_ceph_lock);
390 if ((issued & wanted) != wanted &&
391 (mds_wanted & wanted) != wanted &&
392 ceph_snap(inode) != CEPH_SNAPDIR)
393 ceph_check_caps(ci, 0, NULL);
395 return ceph_init_file(inode, file, fmode);
396 } else if (ceph_snap(inode) != CEPH_NOSNAP &&
397 (ci->i_snap_caps & wanted) == wanted) {
398 __ceph_touch_fmode(ci, mdsc, fmode);
399 spin_unlock(&ci->i_ceph_lock);
400 return ceph_init_file(inode, file, fmode);
403 spin_unlock(&ci->i_ceph_lock);
405 dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
406 req = prepare_open_request(inode->i_sb, flags, 0);
411 req->r_inode = inode;
415 err = ceph_mdsc_do_request(mdsc, NULL, req);
417 err = ceph_init_file(inode, file, req->r_fmode);
418 ceph_mdsc_put_request(req);
419 dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
424 /* Clone the layout from a synchronous create, if the dir now has Dc caps */
426 cache_file_layout(struct inode *dst, struct inode *src)
428 struct ceph_inode_info *cdst = ceph_inode(dst);
429 struct ceph_inode_info *csrc = ceph_inode(src);
431 spin_lock(&cdst->i_ceph_lock);
432 if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) &&
433 !ceph_file_layout_is_valid(&cdst->i_cached_layout)) {
434 memcpy(&cdst->i_cached_layout, &csrc->i_layout,
435 sizeof(cdst->i_cached_layout));
436 rcu_assign_pointer(cdst->i_cached_layout.pool_ns,
437 ceph_try_get_string(csrc->i_layout.pool_ns));
439 spin_unlock(&cdst->i_ceph_lock);
443 * Try to set up an async create. We need caps, a file layout, and inode number,
444 * and either a lease on the dentry or complete dir info. If any of those
445 * criteria are not satisfied, then return false and the caller can go
448 static int try_prep_async_create(struct inode *dir, struct dentry *dentry,
449 struct ceph_file_layout *lo, u64 *pino)
451 struct ceph_inode_info *ci = ceph_inode(dir);
452 struct ceph_dentry_info *di = ceph_dentry(dentry);
453 int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
456 spin_lock(&ci->i_ceph_lock);
457 /* No auth cap means no chance for Dc caps */
461 /* Any delegated inos? */
462 if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos))
465 if (!ceph_file_layout_is_valid(&ci->i_cached_layout))
468 if ((__ceph_caps_issued(ci, NULL) & want) != want)
471 if (d_in_lookup(dentry)) {
472 if (!__ceph_dir_is_complete(ci))
474 spin_lock(&dentry->d_lock);
475 di->lease_shared_gen = atomic_read(&ci->i_shared_gen);
476 spin_unlock(&dentry->d_lock);
477 } else if (atomic_read(&ci->i_shared_gen) !=
478 READ_ONCE(di->lease_shared_gen)) {
482 ino = ceph_get_deleg_ino(ci->i_auth_cap->session);
487 ceph_take_cap_refs(ci, want, false);
488 memcpy(lo, &ci->i_cached_layout, sizeof(*lo));
489 rcu_assign_pointer(lo->pool_ns,
490 ceph_try_get_string(ci->i_cached_layout.pool_ns));
493 spin_unlock(&ci->i_ceph_lock);
497 static void restore_deleg_ino(struct inode *dir, u64 ino)
499 struct ceph_inode_info *ci = ceph_inode(dir);
500 struct ceph_mds_session *s = NULL;
502 spin_lock(&ci->i_ceph_lock);
504 s = ceph_get_mds_session(ci->i_auth_cap->session);
505 spin_unlock(&ci->i_ceph_lock);
507 int err = ceph_restore_deleg_ino(s, ino);
509 pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n",
511 ceph_put_mds_session(s);
515 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
516 struct ceph_mds_request *req)
518 int result = req->r_err ? req->r_err :
519 le32_to_cpu(req->r_reply_info.head->result);
521 if (result == -EJUKEBOX)
524 mapping_set_error(req->r_parent->i_mapping, result);
527 struct dentry *dentry = req->r_dentry;
528 struct inode *inode = d_inode(dentry);
531 char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
534 ceph_dir_clear_complete(req->r_parent);
535 if (!d_unhashed(dentry))
538 ceph_inode_shutdown(inode);
540 pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n",
541 base, IS_ERR(path) ? "<<bad>>" : path, result);
542 ceph_mdsc_free_path(path, pathlen);
545 if (req->r_target_inode) {
546 struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
547 u64 ino = ceph_vino(req->r_target_inode).ino;
549 if (req->r_deleg_ino != ino)
550 pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n",
551 __func__, req->r_err, req->r_deleg_ino, ino);
552 mapping_set_error(req->r_target_inode->i_mapping, result);
554 spin_lock(&ci->i_ceph_lock);
555 if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
556 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
557 wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
559 ceph_kick_flushing_inode_caps(req->r_session, ci);
560 spin_unlock(&ci->i_ceph_lock);
561 } else if (!result) {
562 pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__,
566 ceph_mdsc_release_dir_caps(req);
569 static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
570 struct file *file, umode_t mode,
571 struct ceph_mds_request *req,
572 struct ceph_acl_sec_ctx *as_ctx,
573 struct ceph_file_layout *lo)
577 struct ceph_mds_reply_inode in = { };
578 struct ceph_mds_reply_info_in iinfo = { .in = &in };
579 struct ceph_inode_info *ci = ceph_inode(dir);
581 struct timespec64 now;
582 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb);
583 struct ceph_vino vino = { .ino = req->r_deleg_ino,
584 .snap = CEPH_NOSNAP };
586 ktime_get_real_ts64(&now);
588 inode = ceph_get_inode(dentry->d_sb, vino);
590 return PTR_ERR(inode);
592 iinfo.inline_version = CEPH_INLINE_NONE;
593 iinfo.change_attr = 1;
594 ceph_encode_timespec64(&iinfo.btime, &now);
596 iinfo.xattr_len = ARRAY_SIZE(xattr_buf);
597 iinfo.xattr_data = xattr_buf;
598 memset(iinfo.xattr_data, 0, iinfo.xattr_len);
600 in.ino = cpu_to_le64(vino.ino);
601 in.snapid = cpu_to_le64(CEPH_NOSNAP);
602 in.version = cpu_to_le64(1); // ???
603 in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
604 in.cap.cap_id = cpu_to_le64(1);
605 in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
606 in.cap.flags = CEPH_CAP_FLAG_AUTH;
607 in.ctime = in.mtime = in.atime = iinfo.btime;
608 in.mode = cpu_to_le32((u32)mode);
609 in.truncate_seq = cpu_to_le32(1);
610 in.truncate_size = cpu_to_le64(-1ULL);
611 in.xattr_version = cpu_to_le64(1);
612 in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid()));
613 in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_mode & S_ISGID ?
614 dir->i_gid : current_fsgid()));
615 in.nlink = cpu_to_le32(1);
616 in.max_size = cpu_to_le64(lo->stripe_unit);
618 ceph_file_layout_to_legacy(lo, &in.layout);
620 down_read(&mdsc->snap_rwsem);
621 ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
623 up_read(&mdsc->snap_rwsem);
625 dout("%s failed to fill inode: %d\n", __func__, ret);
626 ceph_dir_clear_complete(dir);
627 if (!d_unhashed(dentry))
629 if (inode->i_state & I_NEW)
630 discard_new_inode(inode);
634 dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__,
635 vino.ino, ceph_ino(dir), dentry->d_name.name);
636 ceph_dir_clear_ordered(dir);
637 ceph_init_inode_acls(inode, as_ctx);
638 if (inode->i_state & I_NEW) {
640 * If it's not I_NEW, then someone created this before
641 * we got here. Assume the server is aware of it at
642 * that point and don't worry about setting
643 * CEPH_I_ASYNC_CREATE.
645 ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE;
646 unlock_new_inode(inode);
648 if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
649 if (!d_unhashed(dentry))
651 dn = d_splice_alias(inode, dentry);
652 WARN_ON_ONCE(dn && dn != dentry);
654 file->f_mode |= FMODE_CREATED;
655 ret = finish_open(file, dentry, ceph_open);
661 * Do a lookup + open with a single request. If we get a non-existent
662 * file or symlink, return 1 so the VFS can retry.
664 int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
665 struct file *file, unsigned flags, umode_t mode)
667 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
668 struct ceph_mds_client *mdsc = fsc->mdsc;
669 struct ceph_mds_request *req;
671 struct ceph_acl_sec_ctx as_ctx = {};
672 bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS);
676 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
678 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
680 if (dentry->d_name.len > NAME_MAX)
681 return -ENAMETOOLONG;
683 if (flags & O_CREAT) {
684 if (ceph_quota_is_max_files_exceeded(dir))
686 err = ceph_pre_init_acls(dir, &mode, &as_ctx);
689 err = ceph_security_init_secctx(dentry, mode, &as_ctx);
692 } else if (!d_in_lookup(dentry)) {
693 /* If it's not being looked up, it's negative */
698 req = prepare_open_request(dir->i_sb, flags, mode);
703 req->r_dentry = dget(dentry);
705 mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
706 if (ceph_security_xattr_wanted(dir))
707 mask |= CEPH_CAP_XATTR_SHARED;
708 req->r_args.open.mask = cpu_to_le32(mask);
712 if (flags & O_CREAT) {
713 struct ceph_file_layout lo;
715 req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;
716 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
717 if (as_ctx.pagelist) {
718 req->r_pagelist = as_ctx.pagelist;
719 as_ctx.pagelist = NULL;
723 try_prep_async_create(dir, dentry, &lo,
724 &req->r_deleg_ino))) {
725 set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
726 req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL);
727 req->r_callback = ceph_async_create_cb;
728 err = ceph_mdsc_submit_request(mdsc, dir, req);
730 err = ceph_finish_async_create(dir, dentry,
733 } else if (err == -EJUKEBOX) {
734 restore_deleg_ino(dir, req->r_deleg_ino);
735 ceph_mdsc_put_request(req);
743 set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
744 err = ceph_mdsc_do_request(mdsc,
745 (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
747 if (err == -ENOENT) {
748 dentry = ceph_handle_snapdir(req, dentry);
749 if (IS_ERR(dentry)) {
750 err = PTR_ERR(dentry);
756 if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
757 err = ceph_handle_notrace_create(dir, dentry);
759 if (d_in_lookup(dentry)) {
760 dn = ceph_finish_lookup(req, dentry, err);
764 /* we were given a hashed negative dentry */
769 if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
770 /* make vfs retry on splice, ENOENT, or symlink */
771 dout("atomic_open finish_no_open on dn %p\n", dn);
772 err = finish_no_open(file, dn);
774 dout("atomic_open finish_open on dn %p\n", dn);
775 if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
776 struct inode *newino = d_inode(dentry);
778 cache_file_layout(dir, newino);
779 ceph_init_inode_acls(newino, &as_ctx);
780 file->f_mode |= FMODE_CREATED;
782 err = finish_open(file, dentry, ceph_open);
785 ceph_mdsc_put_request(req);
787 ceph_release_acl_sec_ctx(&as_ctx);
788 dout("atomic_open result=%d\n", err);
792 int ceph_release(struct inode *inode, struct file *file)
794 struct ceph_inode_info *ci = ceph_inode(inode);
796 if (S_ISDIR(inode->i_mode)) {
797 struct ceph_dir_file_info *dfi = file->private_data;
798 dout("release inode %p dir file %p\n", inode, file);
799 WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
801 ceph_put_fmode(ci, dfi->file_info.fmode, 1);
803 if (dfi->last_readdir)
804 ceph_mdsc_put_request(dfi->last_readdir);
805 kfree(dfi->last_name);
806 kfree(dfi->dir_info);
807 kmem_cache_free(ceph_dir_file_cachep, dfi);
809 struct ceph_file_info *fi = file->private_data;
810 dout("release inode %p regular file %p\n", inode, file);
811 WARN_ON(!list_empty(&fi->rw_contexts));
813 ceph_put_fmode(ci, fi->fmode, 1);
815 kmem_cache_free(ceph_file_cachep, fi);
818 /* wake up anyone waiting for caps on this inode */
819 wake_up_all(&ci->i_cap_wq);
830 * Completely synchronous read and write methods. Direct from __user
831 * buffer to osd, or directly to user pages (if O_DIRECT).
833 * If the read spans object boundary, just do multiple reads. (That's not
834 * atomic, but good enough for now.)
836 * If we get a short result from the OSD, check against i_size; we need to
837 * only return a short read to the caller if we hit EOF.
839 static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
842 struct file *file = iocb->ki_filp;
843 struct inode *inode = file_inode(file);
844 struct ceph_inode_info *ci = ceph_inode(inode);
845 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
846 struct ceph_osd_client *osdc = &fsc->client->osdc;
848 u64 off = iocb->ki_pos;
849 u64 len = iov_iter_count(to);
851 dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len,
852 (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
857 * flush any page cache pages in this range. this
858 * will make concurrent normal and sync io slow,
859 * but it will at least behave sensibly when they are
862 ret = filemap_write_and_wait_range(inode->i_mapping,
868 while ((len = iov_iter_count(to)) > 0) {
869 struct ceph_osd_request *req;
878 req = ceph_osdc_new_request(osdc, &ci->i_layout,
879 ci->i_vino, off, &len, 0, 1,
880 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
881 NULL, ci->i_truncate_seq,
882 ci->i_truncate_size, false);
888 more = len < iov_iter_count(to);
890 num_pages = calc_pages_for(off, len);
891 page_off = off & ~PAGE_MASK;
892 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
894 ceph_osdc_put_request(req);
895 ret = PTR_ERR(pages);
899 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off,
901 ret = ceph_osdc_start_request(osdc, req, false);
903 ret = ceph_osdc_wait_request(osdc, req);
905 ceph_update_read_metrics(&fsc->mdsc->metric,
906 req->r_start_latency,
910 ceph_osdc_put_request(req);
912 i_size = i_size_read(inode);
913 dout("sync_read %llu~%llu got %zd i_size %llu%s\n",
914 off, len, ret, i_size, (more ? " MORE" : ""));
918 if (ret >= 0 && ret < len && (off + ret < i_size)) {
919 int zlen = min(len - ret, i_size - off - ret);
920 int zoff = page_off + ret;
921 dout("sync_read zero gap %llu~%llu\n",
922 off + ret, off + ret + zlen);
923 ceph_zero_page_vector_range(zoff, zlen, pages);
928 left = ret > 0 ? ret : 0;
931 page_off = off & ~PAGE_MASK;
932 len = min_t(size_t, left, PAGE_SIZE - page_off);
933 SetPageUptodate(pages[idx]);
934 copied = copy_page_to_iter(pages[idx++],
943 ceph_release_page_vector(pages, num_pages);
946 if (ret == -EBLOCKLISTED)
947 fsc->blocklisted = true;
951 if (off >= i_size || !more)
955 if (off > iocb->ki_pos) {
957 iov_iter_count(to) > 0 && off >= i_size_read(inode))
958 *retry_op = CHECK_EOF;
959 ret = off - iocb->ki_pos;
963 dout("sync_read result %zd retry_op %d\n", ret, *retry_op);
967 struct ceph_aio_request {
973 struct list_head osd_reqs;
975 atomic_t pending_reqs;
976 struct timespec64 mtime;
977 struct ceph_cap_flush *prealloc_cf;
980 struct ceph_aio_work {
981 struct work_struct work;
982 struct ceph_osd_request *req;
985 static void ceph_aio_retry_work(struct work_struct *work);
987 static void ceph_aio_complete(struct inode *inode,
988 struct ceph_aio_request *aio_req)
990 struct ceph_inode_info *ci = ceph_inode(inode);
993 if (!atomic_dec_and_test(&aio_req->pending_reqs))
996 if (aio_req->iocb->ki_flags & IOCB_DIRECT)
997 inode_dio_end(inode);
999 ret = aio_req->error;
1001 ret = aio_req->total_len;
1003 dout("ceph_aio_complete %p rc %d\n", inode, ret);
1005 if (ret >= 0 && aio_req->write) {
1008 loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
1009 if (endoff > i_size_read(inode)) {
1010 if (ceph_inode_set_size(inode, endoff))
1011 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1014 spin_lock(&ci->i_ceph_lock);
1015 ci->i_inline_version = CEPH_INLINE_NONE;
1016 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1017 &aio_req->prealloc_cf);
1018 spin_unlock(&ci->i_ceph_lock);
1020 __mark_inode_dirty(inode, dirty);
1024 ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
1027 aio_req->iocb->ki_complete(aio_req->iocb, ret, 0);
1029 ceph_free_cap_flush(aio_req->prealloc_cf);
1033 static void ceph_aio_complete_req(struct ceph_osd_request *req)
1035 int rc = req->r_result;
1036 struct inode *inode = req->r_inode;
1037 struct ceph_aio_request *aio_req = req->r_priv;
1038 struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
1039 struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric;
1040 unsigned int len = osd_data->bvec_pos.iter.bi_size;
1042 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS);
1043 BUG_ON(!osd_data->num_bvecs);
1045 dout("ceph_aio_complete_req %p rc %d bytes %u\n", inode, rc, len);
1047 if (rc == -EOLDSNAPC) {
1048 struct ceph_aio_work *aio_work;
1049 BUG_ON(!aio_req->write);
1051 aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS);
1053 INIT_WORK(&aio_work->work, ceph_aio_retry_work);
1054 aio_work->req = req;
1055 queue_work(ceph_inode_to_client(inode)->inode_wq,
1060 } else if (!aio_req->write) {
1063 if (rc >= 0 && len > rc) {
1065 int zlen = len - rc;
1068 * If read is satisfied by single OSD request,
1069 * it can pass EOF. Otherwise read is within
1072 if (aio_req->num_reqs == 1) {
1073 loff_t i_size = i_size_read(inode);
1074 loff_t endoff = aio_req->iocb->ki_pos + rc;
1075 if (endoff < i_size)
1076 zlen = min_t(size_t, zlen,
1078 aio_req->total_len = rc + zlen;
1081 iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs,
1082 osd_data->num_bvecs, len);
1083 iov_iter_advance(&i, rc);
1084 iov_iter_zero(zlen, &i);
1088 /* r_start_latency == 0 means the request was not submitted */
1089 if (req->r_start_latency) {
1091 ceph_update_write_metrics(metric, req->r_start_latency,
1092 req->r_end_latency, len, rc);
1094 ceph_update_read_metrics(metric, req->r_start_latency,
1095 req->r_end_latency, len, rc);
1098 put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
1099 aio_req->should_dirty);
1100 ceph_osdc_put_request(req);
1103 cmpxchg(&aio_req->error, 0, rc);
1105 ceph_aio_complete(inode, aio_req);
1109 static void ceph_aio_retry_work(struct work_struct *work)
1111 struct ceph_aio_work *aio_work =
1112 container_of(work, struct ceph_aio_work, work);
1113 struct ceph_osd_request *orig_req = aio_work->req;
1114 struct ceph_aio_request *aio_req = orig_req->r_priv;
1115 struct inode *inode = orig_req->r_inode;
1116 struct ceph_inode_info *ci = ceph_inode(inode);
1117 struct ceph_snap_context *snapc;
1118 struct ceph_osd_request *req;
1121 spin_lock(&ci->i_ceph_lock);
1122 if (__ceph_have_pending_cap_snap(ci)) {
1123 struct ceph_cap_snap *capsnap =
1124 list_last_entry(&ci->i_cap_snaps,
1125 struct ceph_cap_snap,
1127 snapc = ceph_get_snap_context(capsnap->context);
1129 BUG_ON(!ci->i_head_snapc);
1130 snapc = ceph_get_snap_context(ci->i_head_snapc);
1132 spin_unlock(&ci->i_ceph_lock);
1134 req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1,
1142 req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1143 ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc);
1144 ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid);
1146 req->r_ops[0] = orig_req->r_ops[0];
1148 req->r_mtime = aio_req->mtime;
1149 req->r_data_offset = req->r_ops[0].extent.offset;
1151 ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
1153 ceph_osdc_put_request(req);
1158 ceph_osdc_put_request(orig_req);
1160 req->r_callback = ceph_aio_complete_req;
1161 req->r_inode = inode;
1162 req->r_priv = aio_req;
1164 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1167 req->r_result = ret;
1168 ceph_aio_complete_req(req);
1171 ceph_put_snap_context(snapc);
1176 ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
1177 struct ceph_snap_context *snapc,
1178 struct ceph_cap_flush **pcf)
1180 struct file *file = iocb->ki_filp;
1181 struct inode *inode = file_inode(file);
1182 struct ceph_inode_info *ci = ceph_inode(inode);
1183 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1184 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1185 struct ceph_vino vino;
1186 struct ceph_osd_request *req;
1187 struct bio_vec *bvecs;
1188 struct ceph_aio_request *aio_req = NULL;
1192 struct timespec64 mtime = current_time(inode);
1193 size_t count = iov_iter_count(iter);
1194 loff_t pos = iocb->ki_pos;
1195 bool write = iov_iter_rw(iter) == WRITE;
1196 bool should_dirty = !write && iter_is_iovec(iter);
1198 if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1201 dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
1202 (write ? "write" : "read"), file, pos, (unsigned)count,
1203 snapc, snapc ? snapc->seq : 0);
1206 int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
1208 (pos + count - 1) >> PAGE_SHIFT);
1210 dout("invalidate_inode_pages2_range returned %d\n", ret2);
1212 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1214 flags = CEPH_OSD_FLAG_READ;
1217 while (iov_iter_count(iter) > 0) {
1218 u64 size = iov_iter_count(iter);
1222 size = min_t(u64, size, fsc->mount_options->wsize);
1224 size = min_t(u64, size, fsc->mount_options->rsize);
1226 vino = ceph_vino(inode);
1227 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1228 vino, pos, &size, 0,
1230 write ? CEPH_OSD_OP_WRITE :
1234 ci->i_truncate_size,
1241 len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages);
1243 ceph_osdc_put_request(req);
1248 osd_req_op_extent_update(req, 0, len);
1251 * To simplify error handling, allow AIO when IO within i_size
1252 * or IO can be satisfied by single OSD request.
1254 if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) &&
1255 (len == count || pos + count <= i_size_read(inode))) {
1256 aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL);
1258 aio_req->iocb = iocb;
1259 aio_req->write = write;
1260 aio_req->should_dirty = should_dirty;
1261 INIT_LIST_HEAD(&aio_req->osd_reqs);
1263 aio_req->mtime = mtime;
1264 swap(aio_req->prealloc_cf, *pcf);
1272 * throw out any page cache pages in this range. this
1275 truncate_inode_pages_range(inode->i_mapping, pos,
1276 PAGE_ALIGN(pos + len) - 1);
1278 req->r_mtime = mtime;
1281 osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
1284 aio_req->total_len += len;
1285 aio_req->num_reqs++;
1286 atomic_inc(&aio_req->pending_reqs);
1288 req->r_callback = ceph_aio_complete_req;
1289 req->r_inode = inode;
1290 req->r_priv = aio_req;
1291 list_add_tail(&req->r_private_item, &aio_req->osd_reqs);
1297 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1299 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1302 ceph_update_write_metrics(metric, req->r_start_latency,
1303 req->r_end_latency, len, ret);
1305 ceph_update_read_metrics(metric, req->r_start_latency,
1306 req->r_end_latency, len, ret);
1308 size = i_size_read(inode);
1312 if (ret >= 0 && ret < len && pos + ret < size) {
1314 int zlen = min_t(size_t, len - ret,
1317 iov_iter_bvec(&i, READ, bvecs, num_pages, len);
1318 iov_iter_advance(&i, ret);
1319 iov_iter_zero(zlen, &i);
1326 put_bvecs(bvecs, num_pages, should_dirty);
1327 ceph_osdc_put_request(req);
1332 if (!write && pos >= size)
1335 if (write && pos > size) {
1336 if (ceph_inode_set_size(inode, pos))
1337 ceph_check_caps(ceph_inode(inode),
1338 CHECK_CAPS_AUTHONLY,
1344 LIST_HEAD(osd_reqs);
1346 if (aio_req->num_reqs == 0) {
1351 ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR :
1354 list_splice(&aio_req->osd_reqs, &osd_reqs);
1355 inode_dio_begin(inode);
1356 while (!list_empty(&osd_reqs)) {
1357 req = list_first_entry(&osd_reqs,
1358 struct ceph_osd_request,
1360 list_del_init(&req->r_private_item);
1362 ret = ceph_osdc_start_request(req->r_osdc,
1365 req->r_result = ret;
1366 ceph_aio_complete_req(req);
1369 return -EIOCBQUEUED;
1372 if (ret != -EOLDSNAPC && pos > iocb->ki_pos) {
1373 ret = pos - iocb->ki_pos;
1380 * Synchronous write, straight from __user pointer or user pages.
1382 * If write spans object boundary, just do multiple writes. (For a
1383 * correct atomic write, we should e.g. take write locks on all
1384 * objects, rollback on failure, etc.)
1387 ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
1388 struct ceph_snap_context *snapc)
1390 struct file *file = iocb->ki_filp;
1391 struct inode *inode = file_inode(file);
1392 struct ceph_inode_info *ci = ceph_inode(inode);
1393 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1394 struct ceph_vino vino;
1395 struct ceph_osd_request *req;
1396 struct page **pages;
1402 bool check_caps = false;
1403 struct timespec64 mtime = current_time(inode);
1404 size_t count = iov_iter_count(from);
1406 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1409 dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
1410 file, pos, (unsigned)count, snapc, snapc->seq);
1412 ret = filemap_write_and_wait_range(inode->i_mapping,
1413 pos, pos + count - 1);
1417 ret = invalidate_inode_pages2_range(inode->i_mapping,
1419 (pos + count - 1) >> PAGE_SHIFT);
1421 dout("invalidate_inode_pages2_range returned %d\n", ret);
1423 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1425 while ((len = iov_iter_count(from)) > 0) {
1429 vino = ceph_vino(inode);
1430 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1431 vino, pos, &len, 0, 1,
1432 CEPH_OSD_OP_WRITE, flags, snapc,
1434 ci->i_truncate_size,
1442 * write from beginning of first page,
1443 * regardless of io alignment
1445 num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
1447 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1448 if (IS_ERR(pages)) {
1449 ret = PTR_ERR(pages);
1454 for (n = 0; n < num_pages; n++) {
1455 size_t plen = min_t(size_t, left, PAGE_SIZE);
1456 ret = copy_page_from_iter(pages[n], 0, plen, from);
1465 ceph_release_page_vector(pages, num_pages);
1469 req->r_inode = inode;
1471 osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
1474 req->r_mtime = mtime;
1475 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1477 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1479 ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
1480 req->r_end_latency, len, ret);
1482 ceph_osdc_put_request(req);
1484 ceph_set_error_write(ci);
1488 ceph_clear_error_write(ci);
1491 if (pos > i_size_read(inode)) {
1492 check_caps = ceph_inode_set_size(inode, pos);
1494 ceph_check_caps(ceph_inode(inode),
1495 CHECK_CAPS_AUTHONLY,
1501 if (ret != -EOLDSNAPC && written > 0) {
1509 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1510 * Atomically grab references, so that those bits are not released
1511 * back to the MDS mid-read.
1513 * Hmm, the sync read case isn't actually async... should it be?
1515 static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
1517 struct file *filp = iocb->ki_filp;
1518 struct ceph_file_info *fi = filp->private_data;
1519 size_t len = iov_iter_count(to);
1520 struct inode *inode = file_inode(filp);
1521 struct ceph_inode_info *ci = ceph_inode(inode);
1522 bool direct_lock = iocb->ki_flags & IOCB_DIRECT;
1525 int retry_op = 0, read = 0;
1528 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1529 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode);
1531 if (ceph_inode_is_shutdown(inode))
1535 ceph_start_io_direct(inode);
1537 ceph_start_io_read(inode);
1539 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1540 want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1542 want = CEPH_CAP_FILE_CACHE;
1543 ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got);
1545 if (iocb->ki_flags & IOCB_DIRECT)
1546 ceph_end_io_direct(inode);
1548 ceph_end_io_read(inode);
1552 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1553 (iocb->ki_flags & IOCB_DIRECT) ||
1554 (fi->flags & CEPH_F_SYNC)) {
1556 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1557 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1558 ceph_cap_string(got));
1560 if (ci->i_inline_version == CEPH_INLINE_NONE) {
1561 if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) {
1562 ret = ceph_direct_read_write(iocb, to,
1564 if (ret >= 0 && ret < len)
1565 retry_op = CHECK_EOF;
1567 ret = ceph_sync_read(iocb, to, &retry_op);
1570 retry_op = READ_INLINE;
1573 CEPH_DEFINE_RW_CONTEXT(rw_ctx, got);
1574 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1575 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1576 ceph_cap_string(got));
1577 ceph_add_rw_context(fi, &rw_ctx);
1578 ret = generic_file_read_iter(iocb, to);
1579 ceph_del_rw_context(fi, &rw_ctx);
1582 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1583 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
1584 ceph_put_cap_refs(ci, got);
1587 ceph_end_io_direct(inode);
1589 ceph_end_io_read(inode);
1591 if (retry_op > HAVE_RETRIED && ret >= 0) {
1593 struct page *page = NULL;
1595 if (retry_op == READ_INLINE) {
1596 page = __page_cache_alloc(GFP_KERNEL);
1601 statret = __ceph_do_getattr(inode, page,
1602 CEPH_STAT_CAP_INLINE_DATA, !!page);
1606 if (statret == -ENODATA) {
1607 BUG_ON(retry_op != READ_INLINE);
1613 i_size = i_size_read(inode);
1614 if (retry_op == READ_INLINE) {
1615 BUG_ON(ret > 0 || read > 0);
1616 if (iocb->ki_pos < i_size &&
1617 iocb->ki_pos < PAGE_SIZE) {
1618 loff_t end = min_t(loff_t, i_size,
1619 iocb->ki_pos + len);
1620 end = min_t(loff_t, end, PAGE_SIZE);
1622 zero_user_segment(page, statret, end);
1623 ret = copy_page_to_iter(page,
1624 iocb->ki_pos & ~PAGE_MASK,
1625 end - iocb->ki_pos, to);
1626 iocb->ki_pos += ret;
1629 if (iocb->ki_pos < i_size && read < len) {
1630 size_t zlen = min_t(size_t, len - read,
1631 i_size - iocb->ki_pos);
1632 ret = iov_iter_zero(zlen, to);
1633 iocb->ki_pos += ret;
1636 __free_pages(page, 0);
1640 /* hit EOF or hole? */
1641 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
1643 dout("sync_read hit hole, ppos %lld < size %lld"
1644 ", reading more\n", iocb->ki_pos, i_size);
1648 retry_op = HAVE_RETRIED;
1660 * Take cap references to avoid releasing caps to MDS mid-write.
1662 * If we are synchronous, and write with an old snap context, the OSD
1663 * may return EOLDSNAPC. In that case, retry the write.. _after_
1664 * dropping our cap refs and allowing the pending snap to logically
1665 * complete _before_ this write occurs.
1667 * If we are near ENOSPC, write synchronously.
1669 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
1671 struct file *file = iocb->ki_filp;
1672 struct ceph_file_info *fi = file->private_data;
1673 struct inode *inode = file_inode(file);
1674 struct ceph_inode_info *ci = ceph_inode(inode);
1675 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1676 struct ceph_osd_client *osdc = &fsc->client->osdc;
1677 struct ceph_cap_flush *prealloc_cf;
1678 ssize_t count, written = 0;
1680 bool direct_lock = false;
1684 loff_t limit = max(i_size_read(inode), fsc->max_file_size);
1686 if (ceph_inode_is_shutdown(inode))
1689 if (ceph_snap(inode) != CEPH_NOSNAP)
1692 prealloc_cf = ceph_alloc_cap_flush();
1696 if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT)
1701 ceph_start_io_direct(inode);
1703 ceph_start_io_write(inode);
1705 /* We can write back this queue in page reclaim */
1706 current->backing_dev_info = inode_to_bdi(inode);
1708 if (iocb->ki_flags & IOCB_APPEND) {
1709 err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1714 err = generic_write_checks(iocb, from);
1719 if (unlikely(pos >= limit)) {
1723 iov_iter_truncate(from, limit - pos);
1726 count = iov_iter_count(from);
1727 if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
1732 down_read(&osdc->lock);
1733 map_flags = osdc->osdmap->flags;
1734 pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id);
1735 up_read(&osdc->lock);
1736 if ((map_flags & CEPH_OSDMAP_FULL) ||
1737 (pool_flags & CEPH_POOL_FLAG_FULL)) {
1742 err = file_remove_privs(file);
1746 if (ci->i_inline_version != CEPH_INLINE_NONE) {
1747 err = ceph_uninline_data(file, NULL);
1752 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1753 inode, ceph_vinop(inode), pos, count, i_size_read(inode));
1754 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1755 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
1757 want = CEPH_CAP_FILE_BUFFER;
1759 err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got);
1763 err = file_update_time(file);
1767 inode_inc_iversion_raw(inode);
1769 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1770 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
1772 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1773 (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
1774 (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
1775 struct ceph_snap_context *snapc;
1776 struct iov_iter data;
1778 spin_lock(&ci->i_ceph_lock);
1779 if (__ceph_have_pending_cap_snap(ci)) {
1780 struct ceph_cap_snap *capsnap =
1781 list_last_entry(&ci->i_cap_snaps,
1782 struct ceph_cap_snap,
1784 snapc = ceph_get_snap_context(capsnap->context);
1786 BUG_ON(!ci->i_head_snapc);
1787 snapc = ceph_get_snap_context(ci->i_head_snapc);
1789 spin_unlock(&ci->i_ceph_lock);
1791 /* we might need to revert back to that point */
1793 if (iocb->ki_flags & IOCB_DIRECT)
1794 written = ceph_direct_read_write(iocb, &data, snapc,
1797 written = ceph_sync_write(iocb, &data, pos, snapc);
1799 ceph_end_io_direct(inode);
1801 ceph_end_io_write(inode);
1803 iov_iter_advance(from, written);
1804 ceph_put_snap_context(snapc);
1807 * No need to acquire the i_truncate_mutex. Because
1808 * the MDS revokes Fwb caps before sending truncate
1809 * message to us. We can't get Fwb cap while there
1810 * are pending vmtruncate. So write and vmtruncate
1811 * can not run at the same time
1813 written = generic_perform_write(file, from, pos);
1814 if (likely(written >= 0))
1815 iocb->ki_pos = pos + written;
1816 ceph_end_io_write(inode);
1822 spin_lock(&ci->i_ceph_lock);
1823 ci->i_inline_version = CEPH_INLINE_NONE;
1824 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1826 spin_unlock(&ci->i_ceph_lock);
1828 __mark_inode_dirty(inode, dirty);
1829 if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
1830 ceph_check_caps(ci, 0, NULL);
1833 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1834 inode, ceph_vinop(inode), pos, (unsigned)count,
1835 ceph_cap_string(got));
1836 ceph_put_cap_refs(ci, got);
1838 if (written == -EOLDSNAPC) {
1839 dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
1840 inode, ceph_vinop(inode), pos, (unsigned)count);
1845 if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
1846 (pool_flags & CEPH_POOL_FLAG_NEARFULL))
1847 iocb->ki_flags |= IOCB_DSYNC;
1848 written = generic_write_sync(iocb, written);
1853 ceph_put_cap_refs(ci, got);
1856 ceph_end_io_direct(inode);
1858 ceph_end_io_write(inode);
1860 ceph_free_cap_flush(prealloc_cf);
1861 current->backing_dev_info = NULL;
1862 return written ? written : err;
1866 * llseek. be sure to verify file size on SEEK_END.
1868 static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
1870 struct inode *inode = file->f_mapping->host;
1871 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1877 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
1878 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1883 i_size = i_size_read(inode);
1890 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1891 * position-querying operation. Avoid rewriting the "same"
1892 * f_pos value back to the file because a concurrent read(),
1893 * write() or lseek() might have altered it
1899 offset += file->f_pos;
1902 if (offset < 0 || offset >= i_size) {
1908 if (offset < 0 || offset >= i_size) {
1916 ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size));
1919 inode_unlock(inode);
1923 static inline void ceph_zero_partial_page(
1924 struct inode *inode, loff_t offset, unsigned size)
1927 pgoff_t index = offset >> PAGE_SHIFT;
1929 page = find_lock_page(inode->i_mapping, index);
1931 wait_on_page_writeback(page);
1932 zero_user(page, offset & (PAGE_SIZE - 1), size);
1938 static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
1941 loff_t nearly = round_up(offset, PAGE_SIZE);
1942 if (offset < nearly) {
1943 loff_t size = nearly - offset;
1946 ceph_zero_partial_page(inode, offset, size);
1950 if (length >= PAGE_SIZE) {
1951 loff_t size = round_down(length, PAGE_SIZE);
1952 truncate_pagecache_range(inode, offset, offset + size - 1);
1957 ceph_zero_partial_page(inode, offset, length);
1960 static int ceph_zero_partial_object(struct inode *inode,
1961 loff_t offset, loff_t *length)
1963 struct ceph_inode_info *ci = ceph_inode(inode);
1964 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1965 struct ceph_osd_request *req;
1971 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
1974 op = CEPH_OSD_OP_ZERO;
1977 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1981 CEPH_OSD_FLAG_WRITE,
1988 req->r_mtime = inode->i_mtime;
1989 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1991 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1995 ceph_osdc_put_request(req);
2001 static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
2004 struct ceph_inode_info *ci = ceph_inode(inode);
2005 s32 stripe_unit = ci->i_layout.stripe_unit;
2006 s32 stripe_count = ci->i_layout.stripe_count;
2007 s32 object_size = ci->i_layout.object_size;
2008 u64 object_set_size = object_size * stripe_count;
2011 /* round offset up to next period boundary */
2012 nearly = offset + object_set_size - 1;
2014 nearly -= do_div(t, object_set_size);
2016 while (length && offset < nearly) {
2017 loff_t size = length;
2018 ret = ceph_zero_partial_object(inode, offset, &size);
2024 while (length >= object_set_size) {
2026 loff_t pos = offset;
2027 for (i = 0; i < stripe_count; ++i) {
2028 ret = ceph_zero_partial_object(inode, pos, NULL);
2033 offset += object_set_size;
2034 length -= object_set_size;
2037 loff_t size = length;
2038 ret = ceph_zero_partial_object(inode, offset, &size);
2047 static long ceph_fallocate(struct file *file, int mode,
2048 loff_t offset, loff_t length)
2050 struct ceph_file_info *fi = file->private_data;
2051 struct inode *inode = file_inode(file);
2052 struct ceph_inode_info *ci = ceph_inode(inode);
2053 struct ceph_cap_flush *prealloc_cf;
2060 if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2063 if (!S_ISREG(inode->i_mode))
2066 prealloc_cf = ceph_alloc_cap_flush();
2072 if (ceph_snap(inode) != CEPH_NOSNAP) {
2077 if (ci->i_inline_version != CEPH_INLINE_NONE) {
2078 ret = ceph_uninline_data(file, NULL);
2083 size = i_size_read(inode);
2085 /* Are we punching a hole beyond EOF? */
2088 if ((offset + length) > size)
2089 length = size - offset;
2091 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2092 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
2094 want = CEPH_CAP_FILE_BUFFER;
2096 ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got);
2100 filemap_invalidate_lock(inode->i_mapping);
2101 ceph_zero_pagecache_range(inode, offset, length);
2102 ret = ceph_zero_objects(inode, offset, length);
2105 spin_lock(&ci->i_ceph_lock);
2106 ci->i_inline_version = CEPH_INLINE_NONE;
2107 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2109 spin_unlock(&ci->i_ceph_lock);
2111 __mark_inode_dirty(inode, dirty);
2113 filemap_invalidate_unlock(inode->i_mapping);
2115 ceph_put_cap_refs(ci, got);
2117 inode_unlock(inode);
2118 ceph_free_cap_flush(prealloc_cf);
2123 * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for
2124 * src_ci. Two attempts are made to obtain both caps, and an error is return if
2125 * this fails; zero is returned on success.
2127 static int get_rd_wr_caps(struct file *src_filp, int *src_got,
2128 struct file *dst_filp,
2129 loff_t dst_endoff, int *dst_got)
2132 bool retrying = false;
2135 ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
2136 dst_endoff, dst_got);
2141 * Since we're already holding the FILE_WR capability for the dst file,
2142 * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some
2143 * retry dance instead to try to get both capabilities.
2145 ret = ceph_try_get_caps(file_inode(src_filp),
2146 CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED,
2149 /* Start by dropping dst_ci caps and getting src_ci caps */
2150 ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got);
2153 /* ceph_try_get_caps masks EAGAIN */
2157 ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD,
2158 CEPH_CAP_FILE_SHARED, -1, src_got);
2161 /*... drop src_ci caps too, and retry */
2162 ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got);
2169 static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got,
2170 struct ceph_inode_info *dst_ci, int dst_got)
2172 ceph_put_cap_refs(src_ci, src_got);
2173 ceph_put_cap_refs(dst_ci, dst_got);
2177 * This function does several size-related checks, returning an error if:
2178 * - source file is smaller than off+len
2179 * - destination file size is not OK (inode_newsize_ok())
2180 * - max bytes quotas is exceeded
2182 static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
2183 loff_t src_off, loff_t dst_off, size_t len)
2185 loff_t size, endoff;
2187 size = i_size_read(src_inode);
2189 * Don't copy beyond source file EOF. Instead of simply setting length
2190 * to (size - src_off), just drop to VFS default implementation, as the
2191 * local i_size may be stale due to other clients writing to the source
2194 if (src_off + len > size) {
2195 dout("Copy beyond EOF (%llu + %zu > %llu)\n",
2196 src_off, len, size);
2199 size = i_size_read(dst_inode);
2201 endoff = dst_off + len;
2202 if (inode_newsize_ok(dst_inode, endoff))
2205 if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff))
2211 static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
2212 struct ceph_inode_info *dst_ci, u64 *dst_off,
2213 struct ceph_fs_client *fsc,
2214 size_t len, unsigned int flags)
2216 struct ceph_object_locator src_oloc, dst_oloc;
2217 struct ceph_object_id src_oid, dst_oid;
2219 u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
2220 u32 src_objlen, dst_objlen;
2221 u32 object_size = src_ci->i_layout.object_size;
2224 src_oloc.pool = src_ci->i_layout.pool_id;
2225 src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
2226 dst_oloc.pool = dst_ci->i_layout.pool_id;
2227 dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
2229 while (len >= object_size) {
2230 ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
2231 object_size, &src_objnum,
2232 &src_objoff, &src_objlen);
2233 ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
2234 object_size, &dst_objnum,
2235 &dst_objoff, &dst_objlen);
2236 ceph_oid_init(&src_oid);
2237 ceph_oid_printf(&src_oid, "%llx.%08llx",
2238 src_ci->i_vino.ino, src_objnum);
2239 ceph_oid_init(&dst_oid);
2240 ceph_oid_printf(&dst_oid, "%llx.%08llx",
2241 dst_ci->i_vino.ino, dst_objnum);
2242 /* Do an object remote copy */
2243 ret = ceph_osdc_copy_from(&fsc->client->osdc,
2244 src_ci->i_vino.snap, 0,
2245 &src_oid, &src_oloc,
2246 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2247 CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
2248 &dst_oid, &dst_oloc,
2249 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2250 CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
2251 dst_ci->i_truncate_seq,
2252 dst_ci->i_truncate_size,
2253 CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
2255 if (ret == -EOPNOTSUPP) {
2256 fsc->have_copy_from2 = false;
2257 pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
2259 dout("ceph_osdc_copy_from returned %d\n", ret);
2265 bytes += object_size;
2266 *src_off += object_size;
2267 *dst_off += object_size;
2271 ceph_oloc_destroy(&src_oloc);
2272 ceph_oloc_destroy(&dst_oloc);
2276 static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
2277 struct file *dst_file, loff_t dst_off,
2278 size_t len, unsigned int flags)
2280 struct inode *src_inode = file_inode(src_file);
2281 struct inode *dst_inode = file_inode(dst_file);
2282 struct ceph_inode_info *src_ci = ceph_inode(src_inode);
2283 struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
2284 struct ceph_cap_flush *prealloc_cf;
2285 struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode);
2287 ssize_t ret = -EIO, bytes;
2288 u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
2289 u32 src_objlen, dst_objlen;
2290 int src_got = 0, dst_got = 0, err, dirty;
2292 if (src_inode->i_sb != dst_inode->i_sb) {
2293 struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode);
2295 if (ceph_fsid_compare(&src_fsc->client->fsid,
2296 &dst_fsc->client->fsid)) {
2297 dout("Copying files across clusters: src: %pU dst: %pU\n",
2298 &src_fsc->client->fsid, &dst_fsc->client->fsid);
2302 if (ceph_snap(dst_inode) != CEPH_NOSNAP)
2306 * Some of the checks below will return -EOPNOTSUPP, which will force a
2307 * fallback to the default VFS copy_file_range implementation. This is
2308 * desirable in several cases (for ex, the 'len' is smaller than the
2309 * size of the objects, or in cases where that would be more
2313 if (ceph_test_mount_opt(src_fsc, NOCOPYFROM))
2316 if (!src_fsc->have_copy_from2)
2320 * Striped file layouts require that we copy partial objects, but the
2321 * OSD copy-from operation only supports full-object copies. Limit
2322 * this to non-striped file layouts for now.
2324 if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) ||
2325 (src_ci->i_layout.stripe_count != 1) ||
2326 (dst_ci->i_layout.stripe_count != 1) ||
2327 (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) {
2328 dout("Invalid src/dst files layout\n");
2332 if (len < src_ci->i_layout.object_size)
2333 return -EOPNOTSUPP; /* no remote copy will be done */
2335 prealloc_cf = ceph_alloc_cap_flush();
2339 /* Start by sync'ing the source and destination files */
2340 ret = file_write_and_wait_range(src_file, src_off, (src_off + len));
2342 dout("failed to write src file (%zd)\n", ret);
2345 ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len));
2347 dout("failed to write dst file (%zd)\n", ret);
2352 * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other
2353 * clients may have dirty data in their caches. And OSDs know nothing
2354 * about caps, so they can't safely do the remote object copies.
2356 err = get_rd_wr_caps(src_file, &src_got,
2357 dst_file, (dst_off + len), &dst_got);
2359 dout("get_rd_wr_caps returned %d\n", err);
2364 ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len);
2368 /* Drop dst file cached pages */
2369 ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
2370 dst_off >> PAGE_SHIFT,
2371 (dst_off + len) >> PAGE_SHIFT);
2373 dout("Failed to invalidate inode pages (%zd)\n", ret);
2376 ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
2377 src_ci->i_layout.object_size,
2378 &src_objnum, &src_objoff, &src_objlen);
2379 ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
2380 dst_ci->i_layout.object_size,
2381 &dst_objnum, &dst_objoff, &dst_objlen);
2382 /* object-level offsets need to the same */
2383 if (src_objoff != dst_objoff) {
2389 * Do a manual copy if the object offset isn't object aligned.
2390 * 'src_objlen' contains the bytes left until the end of the object,
2391 * starting at the src_off
2394 dout("Initial partial copy of %u bytes\n", src_objlen);
2397 * we need to temporarily drop all caps as we'll be calling
2398 * {read,write}_iter, which will get caps again.
2400 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2401 ret = do_splice_direct(src_file, &src_off, dst_file,
2402 &dst_off, src_objlen, flags);
2403 /* Abort on short copies or on error */
2404 if (ret < src_objlen) {
2405 dout("Failed partial copy (%zd)\n", ret);
2409 err = get_rd_wr_caps(src_file, &src_got,
2410 dst_file, (dst_off + len), &dst_got);
2413 err = is_file_size_ok(src_inode, dst_inode,
2414 src_off, dst_off, len);
2419 size = i_size_read(dst_inode);
2420 bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
2421 src_fsc, len, flags);
2427 dout("Copied %zu bytes out of %zu\n", bytes, len);
2431 file_update_time(dst_file);
2432 inode_inc_iversion_raw(dst_inode);
2434 if (dst_off > size) {
2435 /* Let the MDS know about dst file size change */
2436 if (ceph_inode_set_size(dst_inode, dst_off) ||
2437 ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
2438 ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL);
2441 spin_lock(&dst_ci->i_ceph_lock);
2442 dst_ci->i_inline_version = CEPH_INLINE_NONE;
2443 dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf);
2444 spin_unlock(&dst_ci->i_ceph_lock);
2446 __mark_inode_dirty(dst_inode, dirty);
2449 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2452 * Do the final manual copy if we still have some bytes left, unless
2453 * there were errors in remote object copies (len >= object_size).
2455 if (len && (len < src_ci->i_layout.object_size)) {
2456 dout("Final partial copy of %zu bytes\n", len);
2457 bytes = do_splice_direct(src_file, &src_off, dst_file,
2458 &dst_off, len, flags);
2462 dout("Failed partial copy (%zd)\n", bytes);
2466 ceph_free_cap_flush(prealloc_cf);
2471 static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
2472 struct file *dst_file, loff_t dst_off,
2473 size_t len, unsigned int flags)
2477 ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
2480 if (ret == -EOPNOTSUPP || ret == -EXDEV)
2481 ret = generic_copy_file_range(src_file, src_off, dst_file,
2482 dst_off, len, flags);
2486 const struct file_operations ceph_file_fops = {
2488 .release = ceph_release,
2489 .llseek = ceph_llseek,
2490 .read_iter = ceph_read_iter,
2491 .write_iter = ceph_write_iter,
2493 .fsync = ceph_fsync,
2495 .setlease = simple_nosetlease,
2496 .flock = ceph_flock,
2497 .splice_read = generic_file_splice_read,
2498 .splice_write = iter_file_splice_write,
2499 .unlocked_ioctl = ceph_ioctl,
2500 .compat_ioctl = compat_ptr_ioctl,
2501 .fallocate = ceph_fallocate,
2502 .copy_file_range = ceph_copy_file_range,