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_fs_client *fsc = ceph_sb_to_client(sb);
186 struct ceph_mds_client *mdsc = fsc->mdsc;
187 struct ceph_mds_request *req;
188 int want_auth = USE_ANY_MDS;
189 int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN;
191 if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC))
192 want_auth = USE_AUTH_MDS;
194 req = ceph_mdsc_create_request(mdsc, op, want_auth);
197 req->r_fmode = ceph_flags_to_mode(flags);
198 req->r_args.open.flags = ceph_flags_sys2wire(flags);
199 req->r_args.open.mode = cpu_to_le32(create_mode);
204 static int ceph_init_file_info(struct inode *inode, struct file *file,
205 int fmode, bool isdir)
207 struct ceph_inode_info *ci = ceph_inode(inode);
208 struct ceph_file_info *fi;
210 dout("%s %p %p 0%o (%s)\n", __func__, inode, file,
211 inode->i_mode, isdir ? "dir" : "regular");
212 BUG_ON(inode->i_fop->release != ceph_release);
215 struct ceph_dir_file_info *dfi =
216 kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
220 file->private_data = dfi;
221 fi = &dfi->file_info;
222 dfi->next_offset = 2;
223 dfi->readdir_cache_idx = -1;
225 fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
229 file->private_data = fi;
232 ceph_get_fmode(ci, fmode, 1);
235 spin_lock_init(&fi->rw_contexts_lock);
236 INIT_LIST_HEAD(&fi->rw_contexts);
237 fi->meta_err = errseq_sample(&ci->i_meta_err);
238 fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen);
244 * initialize private struct file data.
245 * if we fail, clean up by dropping fmode reference on the ceph_inode
247 static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
251 switch (inode->i_mode & S_IFMT) {
253 ceph_fscache_register_inode_cookie(inode);
254 ceph_fscache_file_set_cookie(inode, file);
257 ret = ceph_init_file_info(inode, file, fmode,
258 S_ISDIR(inode->i_mode));
264 dout("init_file %p %p 0%o (symlink)\n", inode, file,
269 dout("init_file %p %p 0%o (special)\n", inode, file,
272 * we need to drop the open ref now, since we don't
273 * have .release set to ceph_release.
275 BUG_ON(inode->i_fop->release == ceph_release);
277 /* call the proper open fop */
278 ret = inode->i_fop->open(inode, file);
284 * try renew caps after session gets killed.
286 int ceph_renew_caps(struct inode *inode, int fmode)
288 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
289 struct ceph_inode_info *ci = ceph_inode(inode);
290 struct ceph_mds_request *req;
291 int err, flags, wanted;
293 spin_lock(&ci->i_ceph_lock);
294 __ceph_touch_fmode(ci, mdsc, fmode);
295 wanted = __ceph_caps_file_wanted(ci);
296 if (__ceph_is_any_real_caps(ci) &&
297 (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
298 int issued = __ceph_caps_issued(ci, NULL);
299 spin_unlock(&ci->i_ceph_lock);
300 dout("renew caps %p want %s issued %s updating mds_wanted\n",
301 inode, ceph_cap_string(wanted), ceph_cap_string(issued));
302 ceph_check_caps(ci, 0, NULL);
305 spin_unlock(&ci->i_ceph_lock);
308 if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
310 else if (wanted & CEPH_CAP_FILE_RD)
312 else if (wanted & CEPH_CAP_FILE_WR)
315 if (wanted & CEPH_CAP_FILE_LAZYIO)
319 req = prepare_open_request(inode->i_sb, flags, 0);
325 req->r_inode = inode;
329 err = ceph_mdsc_do_request(mdsc, NULL, req);
330 ceph_mdsc_put_request(req);
332 dout("renew caps %p open result=%d\n", inode, err);
333 return err < 0 ? err : 0;
337 * If we already have the requisite capabilities, we can satisfy
338 * the open request locally (no need to request new caps from the
339 * MDS). We do, however, need to inform the MDS (asynchronously)
340 * if our wanted caps set expands.
342 int ceph_open(struct inode *inode, struct file *file)
344 struct ceph_inode_info *ci = ceph_inode(inode);
345 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
346 struct ceph_mds_client *mdsc = fsc->mdsc;
347 struct ceph_mds_request *req;
348 struct ceph_file_info *fi = file->private_data;
350 int flags, fmode, wanted;
353 dout("open file %p is already opened\n", file);
357 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
358 flags = file->f_flags & ~(O_CREAT|O_EXCL);
359 if (S_ISDIR(inode->i_mode))
360 flags = O_DIRECTORY; /* mds likes to know */
362 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
363 ceph_vinop(inode), file, flags, file->f_flags);
364 fmode = ceph_flags_to_mode(flags);
365 wanted = ceph_caps_for_mode(fmode);
367 /* snapped files are read-only */
368 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
371 /* trivially open snapdir */
372 if (ceph_snap(inode) == CEPH_SNAPDIR) {
373 return ceph_init_file(inode, file, fmode);
377 * No need to block if we have caps on the auth MDS (for
378 * write) or any MDS (for read). Update wanted set
381 spin_lock(&ci->i_ceph_lock);
382 if (__ceph_is_any_real_caps(ci) &&
383 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
384 int mds_wanted = __ceph_caps_mds_wanted(ci, true);
385 int issued = __ceph_caps_issued(ci, NULL);
387 dout("open %p fmode %d want %s issued %s using existing\n",
388 inode, fmode, ceph_cap_string(wanted),
389 ceph_cap_string(issued));
390 __ceph_touch_fmode(ci, mdsc, fmode);
391 spin_unlock(&ci->i_ceph_lock);
394 if ((issued & wanted) != wanted &&
395 (mds_wanted & wanted) != wanted &&
396 ceph_snap(inode) != CEPH_SNAPDIR)
397 ceph_check_caps(ci, 0, NULL);
399 return ceph_init_file(inode, file, fmode);
400 } else if (ceph_snap(inode) != CEPH_NOSNAP &&
401 (ci->i_snap_caps & wanted) == wanted) {
402 __ceph_touch_fmode(ci, mdsc, fmode);
403 spin_unlock(&ci->i_ceph_lock);
404 return ceph_init_file(inode, file, fmode);
407 spin_unlock(&ci->i_ceph_lock);
409 dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
410 req = prepare_open_request(inode->i_sb, flags, 0);
415 req->r_inode = inode;
419 err = ceph_mdsc_do_request(mdsc, NULL, req);
421 err = ceph_init_file(inode, file, req->r_fmode);
422 ceph_mdsc_put_request(req);
423 dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
428 /* Clone the layout from a synchronous create, if the dir now has Dc caps */
430 cache_file_layout(struct inode *dst, struct inode *src)
432 struct ceph_inode_info *cdst = ceph_inode(dst);
433 struct ceph_inode_info *csrc = ceph_inode(src);
435 spin_lock(&cdst->i_ceph_lock);
436 if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) &&
437 !ceph_file_layout_is_valid(&cdst->i_cached_layout)) {
438 memcpy(&cdst->i_cached_layout, &csrc->i_layout,
439 sizeof(cdst->i_cached_layout));
440 rcu_assign_pointer(cdst->i_cached_layout.pool_ns,
441 ceph_try_get_string(csrc->i_layout.pool_ns));
443 spin_unlock(&cdst->i_ceph_lock);
447 * Try to set up an async create. We need caps, a file layout, and inode number,
448 * and either a lease on the dentry or complete dir info. If any of those
449 * criteria are not satisfied, then return false and the caller can go
452 static int try_prep_async_create(struct inode *dir, struct dentry *dentry,
453 struct ceph_file_layout *lo, u64 *pino)
455 struct ceph_inode_info *ci = ceph_inode(dir);
456 struct ceph_dentry_info *di = ceph_dentry(dentry);
457 int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
460 spin_lock(&ci->i_ceph_lock);
461 /* No auth cap means no chance for Dc caps */
465 /* Any delegated inos? */
466 if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos))
469 if (!ceph_file_layout_is_valid(&ci->i_cached_layout))
472 if ((__ceph_caps_issued(ci, NULL) & want) != want)
475 if (d_in_lookup(dentry)) {
476 if (!__ceph_dir_is_complete(ci))
478 spin_lock(&dentry->d_lock);
479 di->lease_shared_gen = atomic_read(&ci->i_shared_gen);
480 spin_unlock(&dentry->d_lock);
481 } else if (atomic_read(&ci->i_shared_gen) !=
482 READ_ONCE(di->lease_shared_gen)) {
486 ino = ceph_get_deleg_ino(ci->i_auth_cap->session);
491 ceph_take_cap_refs(ci, want, false);
492 memcpy(lo, &ci->i_cached_layout, sizeof(*lo));
493 rcu_assign_pointer(lo->pool_ns,
494 ceph_try_get_string(ci->i_cached_layout.pool_ns));
497 spin_unlock(&ci->i_ceph_lock);
501 static void restore_deleg_ino(struct inode *dir, u64 ino)
503 struct ceph_inode_info *ci = ceph_inode(dir);
504 struct ceph_mds_session *s = NULL;
506 spin_lock(&ci->i_ceph_lock);
508 s = ceph_get_mds_session(ci->i_auth_cap->session);
509 spin_unlock(&ci->i_ceph_lock);
511 int err = ceph_restore_deleg_ino(s, ino);
513 pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n",
515 ceph_put_mds_session(s);
519 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
520 struct ceph_mds_request *req)
522 int result = req->r_err ? req->r_err :
523 le32_to_cpu(req->r_reply_info.head->result);
525 if (result == -EJUKEBOX)
528 mapping_set_error(req->r_parent->i_mapping, result);
531 struct dentry *dentry = req->r_dentry;
534 char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
537 ceph_dir_clear_complete(req->r_parent);
538 if (!d_unhashed(dentry))
541 /* FIXME: start returning I/O errors on all accesses? */
542 pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n",
543 base, IS_ERR(path) ? "<<bad>>" : path, result);
544 ceph_mdsc_free_path(path, pathlen);
547 if (req->r_target_inode) {
548 struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
549 u64 ino = ceph_vino(req->r_target_inode).ino;
551 if (req->r_deleg_ino != ino)
552 pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n",
553 __func__, req->r_err, req->r_deleg_ino, ino);
554 mapping_set_error(req->r_target_inode->i_mapping, result);
556 spin_lock(&ci->i_ceph_lock);
557 if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
558 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
559 wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
561 ceph_kick_flushing_inode_caps(req->r_session, ci);
562 spin_unlock(&ci->i_ceph_lock);
564 pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__,
568 ceph_mdsc_release_dir_caps(req);
571 static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
572 struct file *file, umode_t mode,
573 struct ceph_mds_request *req,
574 struct ceph_acl_sec_ctx *as_ctx,
575 struct ceph_file_layout *lo)
579 struct ceph_mds_reply_inode in = { };
580 struct ceph_mds_reply_info_in iinfo = { .in = &in };
581 struct ceph_inode_info *ci = ceph_inode(dir);
583 struct timespec64 now;
584 struct ceph_vino vino = { .ino = req->r_deleg_ino,
585 .snap = CEPH_NOSNAP };
587 ktime_get_real_ts64(&now);
589 inode = ceph_get_inode(dentry->d_sb, vino);
591 return PTR_ERR(inode);
593 iinfo.inline_version = CEPH_INLINE_NONE;
594 iinfo.change_attr = 1;
595 ceph_encode_timespec64(&iinfo.btime, &now);
597 iinfo.xattr_len = ARRAY_SIZE(xattr_buf);
598 iinfo.xattr_data = xattr_buf;
599 memset(iinfo.xattr_data, 0, iinfo.xattr_len);
601 in.ino = cpu_to_le64(vino.ino);
602 in.snapid = cpu_to_le64(CEPH_NOSNAP);
603 in.version = cpu_to_le64(1); // ???
604 in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
605 in.cap.cap_id = cpu_to_le64(1);
606 in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
607 in.cap.flags = CEPH_CAP_FLAG_AUTH;
608 in.ctime = in.mtime = in.atime = iinfo.btime;
609 in.mode = cpu_to_le32((u32)mode);
610 in.truncate_seq = cpu_to_le32(1);
611 in.truncate_size = cpu_to_le64(-1ULL);
612 in.xattr_version = cpu_to_le64(1);
613 in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid()));
614 in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_mode & S_ISGID ?
615 dir->i_gid : current_fsgid()));
616 in.nlink = cpu_to_le32(1);
617 in.max_size = cpu_to_le64(lo->stripe_unit);
619 ceph_file_layout_to_legacy(lo, &in.layout);
621 ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
624 dout("%s failed to fill inode: %d\n", __func__, ret);
625 ceph_dir_clear_complete(dir);
626 if (!d_unhashed(dentry))
628 if (inode->i_state & I_NEW)
629 discard_new_inode(inode);
633 dout("%s d_adding new inode 0x%llx to 0x%lx/%s\n", __func__,
634 vino.ino, dir->i_ino, dentry->d_name.name);
635 ceph_dir_clear_ordered(dir);
636 ceph_init_inode_acls(inode, as_ctx);
637 if (inode->i_state & I_NEW) {
639 * If it's not I_NEW, then someone created this before
640 * we got here. Assume the server is aware of it at
641 * that point and don't worry about setting
642 * CEPH_I_ASYNC_CREATE.
644 ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE;
645 unlock_new_inode(inode);
647 if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
648 if (!d_unhashed(dentry))
650 dn = d_splice_alias(inode, dentry);
651 WARN_ON_ONCE(dn && dn != dentry);
653 file->f_mode |= FMODE_CREATED;
654 ret = finish_open(file, dentry, ceph_open);
660 * Do a lookup + open with a single request. If we get a non-existent
661 * file or symlink, return 1 so the VFS can retry.
663 int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
664 struct file *file, unsigned flags, umode_t mode)
666 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
667 struct ceph_mds_client *mdsc = fsc->mdsc;
668 struct ceph_mds_request *req;
670 struct ceph_acl_sec_ctx as_ctx = {};
671 bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS);
675 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
677 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
679 if (dentry->d_name.len > NAME_MAX)
680 return -ENAMETOOLONG;
682 if (flags & O_CREAT) {
683 if (ceph_quota_is_max_files_exceeded(dir))
685 err = ceph_pre_init_acls(dir, &mode, &as_ctx);
688 err = ceph_security_init_secctx(dentry, mode, &as_ctx);
691 } else if (!d_in_lookup(dentry)) {
692 /* If it's not being looked up, it's negative */
697 req = prepare_open_request(dir->i_sb, flags, mode);
702 req->r_dentry = dget(dentry);
704 mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
705 if (ceph_security_xattr_wanted(dir))
706 mask |= CEPH_CAP_XATTR_SHARED;
707 req->r_args.open.mask = cpu_to_le32(mask);
710 if (flags & O_CREAT) {
711 struct ceph_file_layout lo;
713 req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;
714 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
715 if (as_ctx.pagelist) {
716 req->r_pagelist = as_ctx.pagelist;
717 as_ctx.pagelist = NULL;
721 try_prep_async_create(dir, dentry, &lo,
722 &req->r_deleg_ino))) {
723 set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
724 req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL);
725 req->r_callback = ceph_async_create_cb;
726 err = ceph_mdsc_submit_request(mdsc, dir, req);
728 err = ceph_finish_async_create(dir, dentry,
731 } else if (err == -EJUKEBOX) {
732 restore_deleg_ino(dir, req->r_deleg_ino);
733 ceph_mdsc_put_request(req);
741 set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
742 err = ceph_mdsc_do_request(mdsc,
743 (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
745 err = ceph_handle_snapdir(req, dentry, err);
749 if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
750 err = ceph_handle_notrace_create(dir, dentry);
752 if (d_in_lookup(dentry)) {
753 dn = ceph_finish_lookup(req, dentry, err);
757 /* we were given a hashed negative dentry */
762 if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
763 /* make vfs retry on splice, ENOENT, or symlink */
764 dout("atomic_open finish_no_open on dn %p\n", dn);
765 err = finish_no_open(file, dn);
767 dout("atomic_open finish_open on dn %p\n", dn);
768 if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
769 struct inode *newino = d_inode(dentry);
771 cache_file_layout(dir, newino);
772 ceph_init_inode_acls(newino, &as_ctx);
773 file->f_mode |= FMODE_CREATED;
775 err = finish_open(file, dentry, ceph_open);
778 ceph_mdsc_put_request(req);
780 ceph_release_acl_sec_ctx(&as_ctx);
781 dout("atomic_open result=%d\n", err);
785 int ceph_release(struct inode *inode, struct file *file)
787 struct ceph_inode_info *ci = ceph_inode(inode);
789 if (S_ISDIR(inode->i_mode)) {
790 struct ceph_dir_file_info *dfi = file->private_data;
791 dout("release inode %p dir file %p\n", inode, file);
792 WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
794 ceph_put_fmode(ci, dfi->file_info.fmode, 1);
796 if (dfi->last_readdir)
797 ceph_mdsc_put_request(dfi->last_readdir);
798 kfree(dfi->last_name);
799 kfree(dfi->dir_info);
800 kmem_cache_free(ceph_dir_file_cachep, dfi);
802 struct ceph_file_info *fi = file->private_data;
803 dout("release inode %p regular file %p\n", inode, file);
804 WARN_ON(!list_empty(&fi->rw_contexts));
806 ceph_put_fmode(ci, fi->fmode, 1);
808 kmem_cache_free(ceph_file_cachep, fi);
811 /* wake up anyone waiting for caps on this inode */
812 wake_up_all(&ci->i_cap_wq);
823 * Completely synchronous read and write methods. Direct from __user
824 * buffer to osd, or directly to user pages (if O_DIRECT).
826 * If the read spans object boundary, just do multiple reads. (That's not
827 * atomic, but good enough for now.)
829 * If we get a short result from the OSD, check against i_size; we need to
830 * only return a short read to the caller if we hit EOF.
832 static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
835 struct file *file = iocb->ki_filp;
836 struct inode *inode = file_inode(file);
837 struct ceph_inode_info *ci = ceph_inode(inode);
838 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
839 struct ceph_osd_client *osdc = &fsc->client->osdc;
841 u64 off = iocb->ki_pos;
842 u64 len = iov_iter_count(to);
844 dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len,
845 (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
850 * flush any page cache pages in this range. this
851 * will make concurrent normal and sync io slow,
852 * but it will at least behave sensibly when they are
855 ret = filemap_write_and_wait_range(inode->i_mapping,
861 while ((len = iov_iter_count(to)) > 0) {
862 struct ceph_osd_request *req;
869 req = ceph_osdc_new_request(osdc, &ci->i_layout,
870 ci->i_vino, off, &len, 0, 1,
871 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
872 NULL, ci->i_truncate_seq,
873 ci->i_truncate_size, false);
879 more = len < iov_iter_count(to);
881 if (unlikely(iov_iter_is_pipe(to))) {
882 ret = iov_iter_get_pages_alloc(to, &pages, len,
885 ceph_osdc_put_request(req);
889 num_pages = DIV_ROUND_UP(ret + page_off, PAGE_SIZE);
892 osd_req_op_extent_update(req, 0, len);
896 num_pages = calc_pages_for(off, len);
897 page_off = off & ~PAGE_MASK;
898 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
900 ceph_osdc_put_request(req);
901 ret = PTR_ERR(pages);
906 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off,
908 ret = ceph_osdc_start_request(osdc, req, false);
910 ret = ceph_osdc_wait_request(osdc, req);
912 ceph_update_read_latency(&fsc->mdsc->metric,
913 req->r_start_latency,
917 ceph_osdc_put_request(req);
919 i_size = i_size_read(inode);
920 dout("sync_read %llu~%llu got %zd i_size %llu%s\n",
921 off, len, ret, i_size, (more ? " MORE" : ""));
925 if (ret >= 0 && ret < len && (off + ret < i_size)) {
926 int zlen = min(len - ret, i_size - off - ret);
927 int zoff = page_off + ret;
928 dout("sync_read zero gap %llu~%llu\n",
929 off + ret, off + ret + zlen);
930 ceph_zero_page_vector_range(zoff, zlen, pages);
934 if (unlikely(iov_iter_is_pipe(to))) {
936 iov_iter_advance(to, ret);
939 iov_iter_advance(to, 0);
941 ceph_put_page_vector(pages, num_pages, false);
944 size_t left = ret > 0 ? ret : 0;
947 page_off = off & ~PAGE_MASK;
948 len = min_t(size_t, left, PAGE_SIZE - page_off);
949 copied = copy_page_to_iter(pages[idx++],
958 ceph_release_page_vector(pages, num_pages);
962 if (ret == -EBLACKLISTED)
963 fsc->blacklisted = true;
967 if (off >= i_size || !more)
971 if (off > iocb->ki_pos) {
973 iov_iter_count(to) > 0 && off >= i_size_read(inode))
974 *retry_op = CHECK_EOF;
975 ret = off - iocb->ki_pos;
979 dout("sync_read result %zd retry_op %d\n", ret, *retry_op);
983 struct ceph_aio_request {
989 struct list_head osd_reqs;
991 atomic_t pending_reqs;
992 struct timespec64 mtime;
993 struct ceph_cap_flush *prealloc_cf;
996 struct ceph_aio_work {
997 struct work_struct work;
998 struct ceph_osd_request *req;
1001 static void ceph_aio_retry_work(struct work_struct *work);
1003 static void ceph_aio_complete(struct inode *inode,
1004 struct ceph_aio_request *aio_req)
1006 struct ceph_inode_info *ci = ceph_inode(inode);
1009 if (!atomic_dec_and_test(&aio_req->pending_reqs))
1012 if (aio_req->iocb->ki_flags & IOCB_DIRECT)
1013 inode_dio_end(inode);
1015 ret = aio_req->error;
1017 ret = aio_req->total_len;
1019 dout("ceph_aio_complete %p rc %d\n", inode, ret);
1021 if (ret >= 0 && aio_req->write) {
1024 loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
1025 if (endoff > i_size_read(inode)) {
1026 if (ceph_inode_set_size(inode, endoff))
1027 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1030 spin_lock(&ci->i_ceph_lock);
1031 ci->i_inline_version = CEPH_INLINE_NONE;
1032 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1033 &aio_req->prealloc_cf);
1034 spin_unlock(&ci->i_ceph_lock);
1036 __mark_inode_dirty(inode, dirty);
1040 ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
1043 aio_req->iocb->ki_complete(aio_req->iocb, ret, 0);
1045 ceph_free_cap_flush(aio_req->prealloc_cf);
1049 static void ceph_aio_complete_req(struct ceph_osd_request *req)
1051 int rc = req->r_result;
1052 struct inode *inode = req->r_inode;
1053 struct ceph_aio_request *aio_req = req->r_priv;
1054 struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
1055 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1056 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1058 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS);
1059 BUG_ON(!osd_data->num_bvecs);
1061 dout("ceph_aio_complete_req %p rc %d bytes %u\n",
1062 inode, rc, osd_data->bvec_pos.iter.bi_size);
1064 /* r_start_latency == 0 means the request was not submitted */
1065 if (req->r_start_latency) {
1067 ceph_update_write_latency(metric, req->r_start_latency,
1068 req->r_end_latency, rc);
1070 ceph_update_read_latency(metric, req->r_start_latency,
1071 req->r_end_latency, rc);
1074 if (rc == -EOLDSNAPC) {
1075 struct ceph_aio_work *aio_work;
1076 BUG_ON(!aio_req->write);
1078 aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS);
1080 INIT_WORK(&aio_work->work, ceph_aio_retry_work);
1081 aio_work->req = req;
1082 queue_work(ceph_inode_to_client(inode)->inode_wq,
1087 } else if (!aio_req->write) {
1090 if (rc >= 0 && osd_data->bvec_pos.iter.bi_size > rc) {
1092 int zlen = osd_data->bvec_pos.iter.bi_size - rc;
1095 * If read is satisfied by single OSD request,
1096 * it can pass EOF. Otherwise read is within
1099 if (aio_req->num_reqs == 1) {
1100 loff_t i_size = i_size_read(inode);
1101 loff_t endoff = aio_req->iocb->ki_pos + rc;
1102 if (endoff < i_size)
1103 zlen = min_t(size_t, zlen,
1105 aio_req->total_len = rc + zlen;
1108 iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs,
1109 osd_data->num_bvecs,
1110 osd_data->bvec_pos.iter.bi_size);
1111 iov_iter_advance(&i, rc);
1112 iov_iter_zero(zlen, &i);
1116 put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
1117 aio_req->should_dirty);
1118 ceph_osdc_put_request(req);
1121 cmpxchg(&aio_req->error, 0, rc);
1123 ceph_aio_complete(inode, aio_req);
1127 static void ceph_aio_retry_work(struct work_struct *work)
1129 struct ceph_aio_work *aio_work =
1130 container_of(work, struct ceph_aio_work, work);
1131 struct ceph_osd_request *orig_req = aio_work->req;
1132 struct ceph_aio_request *aio_req = orig_req->r_priv;
1133 struct inode *inode = orig_req->r_inode;
1134 struct ceph_inode_info *ci = ceph_inode(inode);
1135 struct ceph_snap_context *snapc;
1136 struct ceph_osd_request *req;
1139 spin_lock(&ci->i_ceph_lock);
1140 if (__ceph_have_pending_cap_snap(ci)) {
1141 struct ceph_cap_snap *capsnap =
1142 list_last_entry(&ci->i_cap_snaps,
1143 struct ceph_cap_snap,
1145 snapc = ceph_get_snap_context(capsnap->context);
1147 BUG_ON(!ci->i_head_snapc);
1148 snapc = ceph_get_snap_context(ci->i_head_snapc);
1150 spin_unlock(&ci->i_ceph_lock);
1152 req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1,
1160 req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1161 ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc);
1162 ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid);
1164 req->r_ops[0] = orig_req->r_ops[0];
1166 req->r_mtime = aio_req->mtime;
1167 req->r_data_offset = req->r_ops[0].extent.offset;
1169 ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
1171 ceph_osdc_put_request(req);
1176 ceph_osdc_put_request(orig_req);
1178 req->r_callback = ceph_aio_complete_req;
1179 req->r_inode = inode;
1180 req->r_priv = aio_req;
1182 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1185 req->r_result = ret;
1186 ceph_aio_complete_req(req);
1189 ceph_put_snap_context(snapc);
1194 ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
1195 struct ceph_snap_context *snapc,
1196 struct ceph_cap_flush **pcf)
1198 struct file *file = iocb->ki_filp;
1199 struct inode *inode = file_inode(file);
1200 struct ceph_inode_info *ci = ceph_inode(inode);
1201 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1202 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1203 struct ceph_vino vino;
1204 struct ceph_osd_request *req;
1205 struct bio_vec *bvecs;
1206 struct ceph_aio_request *aio_req = NULL;
1210 struct timespec64 mtime = current_time(inode);
1211 size_t count = iov_iter_count(iter);
1212 loff_t pos = iocb->ki_pos;
1213 bool write = iov_iter_rw(iter) == WRITE;
1214 bool should_dirty = !write && iter_is_iovec(iter);
1216 if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1219 dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
1220 (write ? "write" : "read"), file, pos, (unsigned)count,
1221 snapc, snapc ? snapc->seq : 0);
1224 int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
1226 (pos + count - 1) >> PAGE_SHIFT);
1228 dout("invalidate_inode_pages2_range returned %d\n", ret2);
1230 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1232 flags = CEPH_OSD_FLAG_READ;
1235 while (iov_iter_count(iter) > 0) {
1236 u64 size = iov_iter_count(iter);
1240 size = min_t(u64, size, fsc->mount_options->wsize);
1242 size = min_t(u64, size, fsc->mount_options->rsize);
1244 vino = ceph_vino(inode);
1245 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1246 vino, pos, &size, 0,
1248 write ? CEPH_OSD_OP_WRITE :
1252 ci->i_truncate_size,
1259 len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages);
1261 ceph_osdc_put_request(req);
1266 osd_req_op_extent_update(req, 0, len);
1269 * To simplify error handling, allow AIO when IO within i_size
1270 * or IO can be satisfied by single OSD request.
1272 if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) &&
1273 (len == count || pos + count <= i_size_read(inode))) {
1274 aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL);
1276 aio_req->iocb = iocb;
1277 aio_req->write = write;
1278 aio_req->should_dirty = should_dirty;
1279 INIT_LIST_HEAD(&aio_req->osd_reqs);
1281 aio_req->mtime = mtime;
1282 swap(aio_req->prealloc_cf, *pcf);
1290 * throw out any page cache pages in this range. this
1293 truncate_inode_pages_range(inode->i_mapping, pos,
1294 PAGE_ALIGN(pos + len) - 1);
1296 req->r_mtime = mtime;
1299 osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
1302 aio_req->total_len += len;
1303 aio_req->num_reqs++;
1304 atomic_inc(&aio_req->pending_reqs);
1306 req->r_callback = ceph_aio_complete_req;
1307 req->r_inode = inode;
1308 req->r_priv = aio_req;
1309 list_add_tail(&req->r_private_item, &aio_req->osd_reqs);
1315 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1317 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1320 ceph_update_write_latency(metric, req->r_start_latency,
1321 req->r_end_latency, ret);
1323 ceph_update_read_latency(metric, req->r_start_latency,
1324 req->r_end_latency, ret);
1326 size = i_size_read(inode);
1330 if (ret >= 0 && ret < len && pos + ret < size) {
1332 int zlen = min_t(size_t, len - ret,
1335 iov_iter_bvec(&i, READ, bvecs, num_pages, len);
1336 iov_iter_advance(&i, ret);
1337 iov_iter_zero(zlen, &i);
1344 put_bvecs(bvecs, num_pages, should_dirty);
1345 ceph_osdc_put_request(req);
1350 if (!write && pos >= size)
1353 if (write && pos > size) {
1354 if (ceph_inode_set_size(inode, pos))
1355 ceph_check_caps(ceph_inode(inode),
1356 CHECK_CAPS_AUTHONLY,
1362 LIST_HEAD(osd_reqs);
1364 if (aio_req->num_reqs == 0) {
1369 ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR :
1372 list_splice(&aio_req->osd_reqs, &osd_reqs);
1373 inode_dio_begin(inode);
1374 while (!list_empty(&osd_reqs)) {
1375 req = list_first_entry(&osd_reqs,
1376 struct ceph_osd_request,
1378 list_del_init(&req->r_private_item);
1380 ret = ceph_osdc_start_request(req->r_osdc,
1383 req->r_result = ret;
1384 ceph_aio_complete_req(req);
1387 return -EIOCBQUEUED;
1390 if (ret != -EOLDSNAPC && pos > iocb->ki_pos) {
1391 ret = pos - iocb->ki_pos;
1398 * Synchronous write, straight from __user pointer or user pages.
1400 * If write spans object boundary, just do multiple writes. (For a
1401 * correct atomic write, we should e.g. take write locks on all
1402 * objects, rollback on failure, etc.)
1405 ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
1406 struct ceph_snap_context *snapc)
1408 struct file *file = iocb->ki_filp;
1409 struct inode *inode = file_inode(file);
1410 struct ceph_inode_info *ci = ceph_inode(inode);
1411 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1412 struct ceph_vino vino;
1413 struct ceph_osd_request *req;
1414 struct page **pages;
1420 bool check_caps = false;
1421 struct timespec64 mtime = current_time(inode);
1422 size_t count = iov_iter_count(from);
1424 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1427 dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
1428 file, pos, (unsigned)count, snapc, snapc->seq);
1430 ret = filemap_write_and_wait_range(inode->i_mapping,
1431 pos, pos + count - 1);
1435 ret = invalidate_inode_pages2_range(inode->i_mapping,
1437 (pos + count - 1) >> PAGE_SHIFT);
1439 dout("invalidate_inode_pages2_range returned %d\n", ret);
1441 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1443 while ((len = iov_iter_count(from)) > 0) {
1447 vino = ceph_vino(inode);
1448 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1449 vino, pos, &len, 0, 1,
1450 CEPH_OSD_OP_WRITE, flags, snapc,
1452 ci->i_truncate_size,
1460 * write from beginning of first page,
1461 * regardless of io alignment
1463 num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
1465 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1466 if (IS_ERR(pages)) {
1467 ret = PTR_ERR(pages);
1472 for (n = 0; n < num_pages; n++) {
1473 size_t plen = min_t(size_t, left, PAGE_SIZE);
1474 ret = copy_page_from_iter(pages[n], 0, plen, from);
1483 ceph_release_page_vector(pages, num_pages);
1487 req->r_inode = inode;
1489 osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
1492 req->r_mtime = mtime;
1493 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1495 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1497 ceph_update_write_latency(&fsc->mdsc->metric, req->r_start_latency,
1498 req->r_end_latency, ret);
1500 ceph_osdc_put_request(req);
1502 ceph_set_error_write(ci);
1506 ceph_clear_error_write(ci);
1509 if (pos > i_size_read(inode)) {
1510 check_caps = ceph_inode_set_size(inode, pos);
1512 ceph_check_caps(ceph_inode(inode),
1513 CHECK_CAPS_AUTHONLY,
1519 if (ret != -EOLDSNAPC && written > 0) {
1527 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1528 * Atomically grab references, so that those bits are not released
1529 * back to the MDS mid-read.
1531 * Hmm, the sync read case isn't actually async... should it be?
1533 static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
1535 struct file *filp = iocb->ki_filp;
1536 struct ceph_file_info *fi = filp->private_data;
1537 size_t len = iov_iter_count(to);
1538 struct inode *inode = file_inode(filp);
1539 struct ceph_inode_info *ci = ceph_inode(inode);
1540 struct page *pinned_page = NULL;
1541 bool direct_lock = iocb->ki_flags & IOCB_DIRECT;
1544 int retry_op = 0, read = 0;
1547 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1548 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode);
1551 ceph_start_io_direct(inode);
1553 ceph_start_io_read(inode);
1555 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1556 want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1558 want = CEPH_CAP_FILE_CACHE;
1559 ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1,
1560 &got, &pinned_page);
1562 if (iocb->ki_flags & IOCB_DIRECT)
1563 ceph_end_io_direct(inode);
1565 ceph_end_io_read(inode);
1569 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1570 (iocb->ki_flags & IOCB_DIRECT) ||
1571 (fi->flags & CEPH_F_SYNC)) {
1573 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1574 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1575 ceph_cap_string(got));
1577 if (ci->i_inline_version == CEPH_INLINE_NONE) {
1578 if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) {
1579 ret = ceph_direct_read_write(iocb, to,
1581 if (ret >= 0 && ret < len)
1582 retry_op = CHECK_EOF;
1584 ret = ceph_sync_read(iocb, to, &retry_op);
1587 retry_op = READ_INLINE;
1590 CEPH_DEFINE_RW_CONTEXT(rw_ctx, got);
1591 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1592 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1593 ceph_cap_string(got));
1594 ceph_add_rw_context(fi, &rw_ctx);
1595 ret = generic_file_read_iter(iocb, to);
1596 ceph_del_rw_context(fi, &rw_ctx);
1599 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1600 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
1602 put_page(pinned_page);
1605 ceph_put_cap_refs(ci, got);
1608 ceph_end_io_direct(inode);
1610 ceph_end_io_read(inode);
1612 if (retry_op > HAVE_RETRIED && ret >= 0) {
1614 struct page *page = NULL;
1616 if (retry_op == READ_INLINE) {
1617 page = __page_cache_alloc(GFP_KERNEL);
1622 statret = __ceph_do_getattr(inode, page,
1623 CEPH_STAT_CAP_INLINE_DATA, !!page);
1627 if (statret == -ENODATA) {
1628 BUG_ON(retry_op != READ_INLINE);
1634 i_size = i_size_read(inode);
1635 if (retry_op == READ_INLINE) {
1636 BUG_ON(ret > 0 || read > 0);
1637 if (iocb->ki_pos < i_size &&
1638 iocb->ki_pos < PAGE_SIZE) {
1639 loff_t end = min_t(loff_t, i_size,
1640 iocb->ki_pos + len);
1641 end = min_t(loff_t, end, PAGE_SIZE);
1643 zero_user_segment(page, statret, end);
1644 ret = copy_page_to_iter(page,
1645 iocb->ki_pos & ~PAGE_MASK,
1646 end - iocb->ki_pos, to);
1647 iocb->ki_pos += ret;
1650 if (iocb->ki_pos < i_size && read < len) {
1651 size_t zlen = min_t(size_t, len - read,
1652 i_size - iocb->ki_pos);
1653 ret = iov_iter_zero(zlen, to);
1654 iocb->ki_pos += ret;
1657 __free_pages(page, 0);
1661 /* hit EOF or hole? */
1662 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
1664 dout("sync_read hit hole, ppos %lld < size %lld"
1665 ", reading more\n", iocb->ki_pos, i_size);
1669 retry_op = HAVE_RETRIED;
1681 * Take cap references to avoid releasing caps to MDS mid-write.
1683 * If we are synchronous, and write with an old snap context, the OSD
1684 * may return EOLDSNAPC. In that case, retry the write.. _after_
1685 * dropping our cap refs and allowing the pending snap to logically
1686 * complete _before_ this write occurs.
1688 * If we are near ENOSPC, write synchronously.
1690 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
1692 struct file *file = iocb->ki_filp;
1693 struct ceph_file_info *fi = file->private_data;
1694 struct inode *inode = file_inode(file);
1695 struct ceph_inode_info *ci = ceph_inode(inode);
1696 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1697 struct ceph_osd_client *osdc = &fsc->client->osdc;
1698 struct ceph_cap_flush *prealloc_cf;
1699 ssize_t count, written = 0;
1701 bool direct_lock = false;
1705 loff_t limit = max(i_size_read(inode), fsc->max_file_size);
1707 if (ceph_snap(inode) != CEPH_NOSNAP)
1710 prealloc_cf = ceph_alloc_cap_flush();
1714 if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT)
1719 ceph_start_io_direct(inode);
1721 ceph_start_io_write(inode);
1723 /* We can write back this queue in page reclaim */
1724 current->backing_dev_info = inode_to_bdi(inode);
1726 if (iocb->ki_flags & IOCB_APPEND) {
1727 err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1732 err = generic_write_checks(iocb, from);
1737 if (unlikely(pos >= limit)) {
1741 iov_iter_truncate(from, limit - pos);
1744 count = iov_iter_count(from);
1745 if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
1750 err = file_remove_privs(file);
1754 err = file_update_time(file);
1758 inode_inc_iversion_raw(inode);
1760 if (ci->i_inline_version != CEPH_INLINE_NONE) {
1761 err = ceph_uninline_data(file, NULL);
1766 down_read(&osdc->lock);
1767 map_flags = osdc->osdmap->flags;
1768 pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id);
1769 up_read(&osdc->lock);
1770 if ((map_flags & CEPH_OSDMAP_FULL) ||
1771 (pool_flags & CEPH_POOL_FLAG_FULL)) {
1776 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1777 inode, ceph_vinop(inode), pos, count, i_size_read(inode));
1778 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1779 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
1781 want = CEPH_CAP_FILE_BUFFER;
1783 err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count,
1788 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1789 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
1791 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1792 (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
1793 (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
1794 struct ceph_snap_context *snapc;
1795 struct iov_iter data;
1797 spin_lock(&ci->i_ceph_lock);
1798 if (__ceph_have_pending_cap_snap(ci)) {
1799 struct ceph_cap_snap *capsnap =
1800 list_last_entry(&ci->i_cap_snaps,
1801 struct ceph_cap_snap,
1803 snapc = ceph_get_snap_context(capsnap->context);
1805 BUG_ON(!ci->i_head_snapc);
1806 snapc = ceph_get_snap_context(ci->i_head_snapc);
1808 spin_unlock(&ci->i_ceph_lock);
1810 /* we might need to revert back to that point */
1812 if (iocb->ki_flags & IOCB_DIRECT)
1813 written = ceph_direct_read_write(iocb, &data, snapc,
1816 written = ceph_sync_write(iocb, &data, pos, snapc);
1818 ceph_end_io_direct(inode);
1820 ceph_end_io_write(inode);
1822 iov_iter_advance(from, written);
1823 ceph_put_snap_context(snapc);
1826 * No need to acquire the i_truncate_mutex. Because
1827 * the MDS revokes Fwb caps before sending truncate
1828 * message to us. We can't get Fwb cap while there
1829 * are pending vmtruncate. So write and vmtruncate
1830 * can not run at the same time
1832 written = generic_perform_write(file, from, pos);
1833 if (likely(written >= 0))
1834 iocb->ki_pos = pos + written;
1835 ceph_end_io_write(inode);
1841 spin_lock(&ci->i_ceph_lock);
1842 ci->i_inline_version = CEPH_INLINE_NONE;
1843 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1845 spin_unlock(&ci->i_ceph_lock);
1847 __mark_inode_dirty(inode, dirty);
1848 if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
1849 ceph_check_caps(ci, 0, NULL);
1852 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1853 inode, ceph_vinop(inode), pos, (unsigned)count,
1854 ceph_cap_string(got));
1855 ceph_put_cap_refs(ci, got);
1857 if (written == -EOLDSNAPC) {
1858 dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
1859 inode, ceph_vinop(inode), pos, (unsigned)count);
1864 if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
1865 (pool_flags & CEPH_POOL_FLAG_NEARFULL))
1866 iocb->ki_flags |= IOCB_DSYNC;
1867 written = generic_write_sync(iocb, written);
1873 ceph_end_io_direct(inode);
1875 ceph_end_io_write(inode);
1877 ceph_free_cap_flush(prealloc_cf);
1878 current->backing_dev_info = NULL;
1879 return written ? written : err;
1883 * llseek. be sure to verify file size on SEEK_END.
1885 static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
1887 struct inode *inode = file->f_mapping->host;
1888 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1894 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
1895 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1900 i_size = i_size_read(inode);
1907 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1908 * position-querying operation. Avoid rewriting the "same"
1909 * f_pos value back to the file because a concurrent read(),
1910 * write() or lseek() might have altered it
1916 offset += file->f_pos;
1919 if (offset < 0 || offset >= i_size) {
1925 if (offset < 0 || offset >= i_size) {
1933 ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size));
1936 inode_unlock(inode);
1940 static inline void ceph_zero_partial_page(
1941 struct inode *inode, loff_t offset, unsigned size)
1944 pgoff_t index = offset >> PAGE_SHIFT;
1946 page = find_lock_page(inode->i_mapping, index);
1948 wait_on_page_writeback(page);
1949 zero_user(page, offset & (PAGE_SIZE - 1), size);
1955 static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
1958 loff_t nearly = round_up(offset, PAGE_SIZE);
1959 if (offset < nearly) {
1960 loff_t size = nearly - offset;
1963 ceph_zero_partial_page(inode, offset, size);
1967 if (length >= PAGE_SIZE) {
1968 loff_t size = round_down(length, PAGE_SIZE);
1969 truncate_pagecache_range(inode, offset, offset + size - 1);
1974 ceph_zero_partial_page(inode, offset, length);
1977 static int ceph_zero_partial_object(struct inode *inode,
1978 loff_t offset, loff_t *length)
1980 struct ceph_inode_info *ci = ceph_inode(inode);
1981 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1982 struct ceph_osd_request *req;
1988 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
1991 op = CEPH_OSD_OP_ZERO;
1994 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1998 CEPH_OSD_FLAG_WRITE,
2005 req->r_mtime = inode->i_mtime;
2006 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
2008 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
2012 ceph_osdc_put_request(req);
2018 static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
2021 struct ceph_inode_info *ci = ceph_inode(inode);
2022 s32 stripe_unit = ci->i_layout.stripe_unit;
2023 s32 stripe_count = ci->i_layout.stripe_count;
2024 s32 object_size = ci->i_layout.object_size;
2025 u64 object_set_size = object_size * stripe_count;
2028 /* round offset up to next period boundary */
2029 nearly = offset + object_set_size - 1;
2031 nearly -= do_div(t, object_set_size);
2033 while (length && offset < nearly) {
2034 loff_t size = length;
2035 ret = ceph_zero_partial_object(inode, offset, &size);
2041 while (length >= object_set_size) {
2043 loff_t pos = offset;
2044 for (i = 0; i < stripe_count; ++i) {
2045 ret = ceph_zero_partial_object(inode, pos, NULL);
2050 offset += object_set_size;
2051 length -= object_set_size;
2054 loff_t size = length;
2055 ret = ceph_zero_partial_object(inode, offset, &size);
2064 static long ceph_fallocate(struct file *file, int mode,
2065 loff_t offset, loff_t length)
2067 struct ceph_file_info *fi = file->private_data;
2068 struct inode *inode = file_inode(file);
2069 struct ceph_inode_info *ci = ceph_inode(inode);
2070 struct ceph_cap_flush *prealloc_cf;
2077 if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2080 if (!S_ISREG(inode->i_mode))
2083 prealloc_cf = ceph_alloc_cap_flush();
2089 if (ceph_snap(inode) != CEPH_NOSNAP) {
2094 if (ci->i_inline_version != CEPH_INLINE_NONE) {
2095 ret = ceph_uninline_data(file, NULL);
2100 size = i_size_read(inode);
2102 /* Are we punching a hole beyond EOF? */
2105 if ((offset + length) > size)
2106 length = size - offset;
2108 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2109 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
2111 want = CEPH_CAP_FILE_BUFFER;
2113 ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got, NULL);
2117 ceph_zero_pagecache_range(inode, offset, length);
2118 ret = ceph_zero_objects(inode, offset, length);
2121 spin_lock(&ci->i_ceph_lock);
2122 ci->i_inline_version = CEPH_INLINE_NONE;
2123 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2125 spin_unlock(&ci->i_ceph_lock);
2127 __mark_inode_dirty(inode, dirty);
2130 ceph_put_cap_refs(ci, got);
2132 inode_unlock(inode);
2133 ceph_free_cap_flush(prealloc_cf);
2138 * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for
2139 * src_ci. Two attempts are made to obtain both caps, and an error is return if
2140 * this fails; zero is returned on success.
2142 static int get_rd_wr_caps(struct file *src_filp, int *src_got,
2143 struct file *dst_filp,
2144 loff_t dst_endoff, int *dst_got)
2147 bool retrying = false;
2150 ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
2151 dst_endoff, dst_got, NULL);
2156 * Since we're already holding the FILE_WR capability for the dst file,
2157 * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some
2158 * retry dance instead to try to get both capabilities.
2160 ret = ceph_try_get_caps(file_inode(src_filp),
2161 CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED,
2164 /* Start by dropping dst_ci caps and getting src_ci caps */
2165 ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got);
2168 /* ceph_try_get_caps masks EAGAIN */
2172 ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD,
2173 CEPH_CAP_FILE_SHARED, -1, src_got, NULL);
2176 /*... drop src_ci caps too, and retry */
2177 ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got);
2184 static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got,
2185 struct ceph_inode_info *dst_ci, int dst_got)
2187 ceph_put_cap_refs(src_ci, src_got);
2188 ceph_put_cap_refs(dst_ci, dst_got);
2192 * This function does several size-related checks, returning an error if:
2193 * - source file is smaller than off+len
2194 * - destination file size is not OK (inode_newsize_ok())
2195 * - max bytes quotas is exceeded
2197 static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
2198 loff_t src_off, loff_t dst_off, size_t len)
2200 loff_t size, endoff;
2202 size = i_size_read(src_inode);
2204 * Don't copy beyond source file EOF. Instead of simply setting length
2205 * to (size - src_off), just drop to VFS default implementation, as the
2206 * local i_size may be stale due to other clients writing to the source
2209 if (src_off + len > size) {
2210 dout("Copy beyond EOF (%llu + %zu > %llu)\n",
2211 src_off, len, size);
2214 size = i_size_read(dst_inode);
2216 endoff = dst_off + len;
2217 if (inode_newsize_ok(dst_inode, endoff))
2220 if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff))
2226 static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
2227 struct ceph_inode_info *dst_ci, u64 *dst_off,
2228 struct ceph_fs_client *fsc,
2229 size_t len, unsigned int flags)
2231 struct ceph_object_locator src_oloc, dst_oloc;
2232 struct ceph_object_id src_oid, dst_oid;
2234 u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
2235 u32 src_objlen, dst_objlen;
2236 u32 object_size = src_ci->i_layout.object_size;
2239 src_oloc.pool = src_ci->i_layout.pool_id;
2240 src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
2241 dst_oloc.pool = dst_ci->i_layout.pool_id;
2242 dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
2244 while (len >= object_size) {
2245 ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
2246 object_size, &src_objnum,
2247 &src_objoff, &src_objlen);
2248 ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
2249 object_size, &dst_objnum,
2250 &dst_objoff, &dst_objlen);
2251 ceph_oid_init(&src_oid);
2252 ceph_oid_printf(&src_oid, "%llx.%08llx",
2253 src_ci->i_vino.ino, src_objnum);
2254 ceph_oid_init(&dst_oid);
2255 ceph_oid_printf(&dst_oid, "%llx.%08llx",
2256 dst_ci->i_vino.ino, dst_objnum);
2257 /* Do an object remote copy */
2258 ret = ceph_osdc_copy_from(&fsc->client->osdc,
2259 src_ci->i_vino.snap, 0,
2260 &src_oid, &src_oloc,
2261 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2262 CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
2263 &dst_oid, &dst_oloc,
2264 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2265 CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
2266 dst_ci->i_truncate_seq,
2267 dst_ci->i_truncate_size,
2268 CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
2270 if (ret == -EOPNOTSUPP) {
2271 fsc->have_copy_from2 = false;
2272 pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
2274 dout("ceph_osdc_copy_from returned %d\n", ret);
2280 bytes += object_size;
2281 *src_off += object_size;
2282 *dst_off += object_size;
2286 ceph_oloc_destroy(&src_oloc);
2287 ceph_oloc_destroy(&dst_oloc);
2291 static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
2292 struct file *dst_file, loff_t dst_off,
2293 size_t len, unsigned int flags)
2295 struct inode *src_inode = file_inode(src_file);
2296 struct inode *dst_inode = file_inode(dst_file);
2297 struct ceph_inode_info *src_ci = ceph_inode(src_inode);
2298 struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
2299 struct ceph_cap_flush *prealloc_cf;
2300 struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode);
2302 ssize_t ret = -EIO, bytes;
2303 u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
2304 u32 src_objlen, dst_objlen;
2305 int src_got = 0, dst_got = 0, err, dirty;
2307 if (src_inode->i_sb != dst_inode->i_sb) {
2308 struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode);
2310 if (ceph_fsid_compare(&src_fsc->client->fsid,
2311 &dst_fsc->client->fsid)) {
2312 dout("Copying files across clusters: src: %pU dst: %pU\n",
2313 &src_fsc->client->fsid, &dst_fsc->client->fsid);
2317 if (ceph_snap(dst_inode) != CEPH_NOSNAP)
2321 * Some of the checks below will return -EOPNOTSUPP, which will force a
2322 * fallback to the default VFS copy_file_range implementation. This is
2323 * desirable in several cases (for ex, the 'len' is smaller than the
2324 * size of the objects, or in cases where that would be more
2328 if (ceph_test_mount_opt(src_fsc, NOCOPYFROM))
2331 if (!src_fsc->have_copy_from2)
2335 * Striped file layouts require that we copy partial objects, but the
2336 * OSD copy-from operation only supports full-object copies. Limit
2337 * this to non-striped file layouts for now.
2339 if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) ||
2340 (src_ci->i_layout.stripe_count != 1) ||
2341 (dst_ci->i_layout.stripe_count != 1) ||
2342 (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) {
2343 dout("Invalid src/dst files layout\n");
2347 if (len < src_ci->i_layout.object_size)
2348 return -EOPNOTSUPP; /* no remote copy will be done */
2350 prealloc_cf = ceph_alloc_cap_flush();
2354 /* Start by sync'ing the source and destination files */
2355 ret = file_write_and_wait_range(src_file, src_off, (src_off + len));
2357 dout("failed to write src file (%zd)\n", ret);
2360 ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len));
2362 dout("failed to write dst file (%zd)\n", ret);
2367 * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other
2368 * clients may have dirty data in their caches. And OSDs know nothing
2369 * about caps, so they can't safely do the remote object copies.
2371 err = get_rd_wr_caps(src_file, &src_got,
2372 dst_file, (dst_off + len), &dst_got);
2374 dout("get_rd_wr_caps returned %d\n", err);
2379 ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len);
2383 /* Drop dst file cached pages */
2384 ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
2385 dst_off >> PAGE_SHIFT,
2386 (dst_off + len) >> PAGE_SHIFT);
2388 dout("Failed to invalidate inode pages (%zd)\n", ret);
2391 ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
2392 src_ci->i_layout.object_size,
2393 &src_objnum, &src_objoff, &src_objlen);
2394 ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
2395 dst_ci->i_layout.object_size,
2396 &dst_objnum, &dst_objoff, &dst_objlen);
2397 /* object-level offsets need to the same */
2398 if (src_objoff != dst_objoff) {
2404 * Do a manual copy if the object offset isn't object aligned.
2405 * 'src_objlen' contains the bytes left until the end of the object,
2406 * starting at the src_off
2409 dout("Initial partial copy of %u bytes\n", src_objlen);
2412 * we need to temporarily drop all caps as we'll be calling
2413 * {read,write}_iter, which will get caps again.
2415 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2416 ret = do_splice_direct(src_file, &src_off, dst_file,
2417 &dst_off, src_objlen, flags);
2418 /* Abort on short copies or on error */
2419 if (ret < src_objlen) {
2420 dout("Failed partial copy (%zd)\n", ret);
2424 err = get_rd_wr_caps(src_file, &src_got,
2425 dst_file, (dst_off + len), &dst_got);
2428 err = is_file_size_ok(src_inode, dst_inode,
2429 src_off, dst_off, len);
2434 size = i_size_read(dst_inode);
2435 bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
2436 src_fsc, len, flags);
2442 dout("Copied %zu bytes out of %zu\n", bytes, len);
2446 file_update_time(dst_file);
2447 inode_inc_iversion_raw(dst_inode);
2449 if (dst_off > size) {
2450 /* Let the MDS know about dst file size change */
2451 if (ceph_inode_set_size(dst_inode, dst_off) ||
2452 ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
2453 ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL);
2456 spin_lock(&dst_ci->i_ceph_lock);
2457 dst_ci->i_inline_version = CEPH_INLINE_NONE;
2458 dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf);
2459 spin_unlock(&dst_ci->i_ceph_lock);
2461 __mark_inode_dirty(dst_inode, dirty);
2464 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2467 * Do the final manual copy if we still have some bytes left, unless
2468 * there were errors in remote object copies (len >= object_size).
2470 if (len && (len < src_ci->i_layout.object_size)) {
2471 dout("Final partial copy of %zu bytes\n", len);
2472 bytes = do_splice_direct(src_file, &src_off, dst_file,
2473 &dst_off, len, flags);
2477 dout("Failed partial copy (%zd)\n", bytes);
2481 ceph_free_cap_flush(prealloc_cf);
2486 static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
2487 struct file *dst_file, loff_t dst_off,
2488 size_t len, unsigned int flags)
2492 ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
2495 if (ret == -EOPNOTSUPP || ret == -EXDEV)
2496 ret = generic_copy_file_range(src_file, src_off, dst_file,
2497 dst_off, len, flags);
2501 const struct file_operations ceph_file_fops = {
2503 .release = ceph_release,
2504 .llseek = ceph_llseek,
2505 .read_iter = ceph_read_iter,
2506 .write_iter = ceph_write_iter,
2508 .fsync = ceph_fsync,
2510 .flock = ceph_flock,
2511 .splice_read = generic_file_splice_read,
2512 .splice_write = iter_file_splice_write,
2513 .unlocked_ioctl = ceph_ioctl,
2514 .compat_ioctl = compat_ptr_ioctl,
2515 .fallocate = ceph_fallocate,
2516 .copy_file_range = ceph_copy_file_range,