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->meta_err = errseq_sample(&ci->i_meta_err);
237 fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen);
243 * initialize private struct file data.
244 * if we fail, clean up by dropping fmode reference on the ceph_inode
246 static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
250 switch (inode->i_mode & S_IFMT) {
252 ceph_fscache_register_inode_cookie(inode);
253 ceph_fscache_file_set_cookie(inode, file);
256 ret = ceph_init_file_info(inode, file, fmode,
257 S_ISDIR(inode->i_mode));
261 dout("init_file %p %p 0%o (symlink)\n", inode, file,
266 dout("init_file %p %p 0%o (special)\n", inode, file,
269 * we need to drop the open ref now, since we don't
270 * have .release set to ceph_release.
272 BUG_ON(inode->i_fop->release == ceph_release);
274 /* call the proper open fop */
275 ret = inode->i_fop->open(inode, file);
281 * try renew caps after session gets killed.
283 int ceph_renew_caps(struct inode *inode, int fmode)
285 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
286 struct ceph_inode_info *ci = ceph_inode(inode);
287 struct ceph_mds_request *req;
288 int err, flags, wanted;
290 spin_lock(&ci->i_ceph_lock);
291 __ceph_touch_fmode(ci, mdsc, fmode);
292 wanted = __ceph_caps_file_wanted(ci);
293 if (__ceph_is_any_real_caps(ci) &&
294 (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
295 int issued = __ceph_caps_issued(ci, NULL);
296 spin_unlock(&ci->i_ceph_lock);
297 dout("renew caps %p want %s issued %s updating mds_wanted\n",
298 inode, ceph_cap_string(wanted), ceph_cap_string(issued));
299 ceph_check_caps(ci, 0, NULL);
302 spin_unlock(&ci->i_ceph_lock);
305 if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
307 else if (wanted & CEPH_CAP_FILE_RD)
309 else if (wanted & CEPH_CAP_FILE_WR)
312 if (wanted & CEPH_CAP_FILE_LAZYIO)
316 req = prepare_open_request(inode->i_sb, flags, 0);
322 req->r_inode = inode;
326 err = ceph_mdsc_do_request(mdsc, NULL, req);
327 ceph_mdsc_put_request(req);
329 dout("renew caps %p open result=%d\n", inode, err);
330 return err < 0 ? err : 0;
334 * If we already have the requisite capabilities, we can satisfy
335 * the open request locally (no need to request new caps from the
336 * MDS). We do, however, need to inform the MDS (asynchronously)
337 * if our wanted caps set expands.
339 int ceph_open(struct inode *inode, struct file *file)
341 struct ceph_inode_info *ci = ceph_inode(inode);
342 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
343 struct ceph_mds_client *mdsc = fsc->mdsc;
344 struct ceph_mds_request *req;
345 struct ceph_file_info *fi = file->private_data;
347 int flags, fmode, wanted;
350 dout("open file %p is already opened\n", file);
354 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
355 flags = file->f_flags & ~(O_CREAT|O_EXCL);
356 if (S_ISDIR(inode->i_mode))
357 flags = O_DIRECTORY; /* mds likes to know */
359 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
360 ceph_vinop(inode), file, flags, file->f_flags);
361 fmode = ceph_flags_to_mode(flags);
362 wanted = ceph_caps_for_mode(fmode);
364 /* snapped files are read-only */
365 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
368 /* trivially open snapdir */
369 if (ceph_snap(inode) == CEPH_SNAPDIR) {
370 return ceph_init_file(inode, file, fmode);
374 * No need to block if we have caps on the auth MDS (for
375 * write) or any MDS (for read). Update wanted set
378 spin_lock(&ci->i_ceph_lock);
379 if (__ceph_is_any_real_caps(ci) &&
380 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
381 int mds_wanted = __ceph_caps_mds_wanted(ci, true);
382 int issued = __ceph_caps_issued(ci, NULL);
384 dout("open %p fmode %d want %s issued %s using existing\n",
385 inode, fmode, ceph_cap_string(wanted),
386 ceph_cap_string(issued));
387 __ceph_touch_fmode(ci, mdsc, fmode);
388 spin_unlock(&ci->i_ceph_lock);
391 if ((issued & wanted) != wanted &&
392 (mds_wanted & wanted) != wanted &&
393 ceph_snap(inode) != CEPH_SNAPDIR)
394 ceph_check_caps(ci, 0, NULL);
396 return ceph_init_file(inode, file, fmode);
397 } else if (ceph_snap(inode) != CEPH_NOSNAP &&
398 (ci->i_snap_caps & wanted) == wanted) {
399 __ceph_touch_fmode(ci, mdsc, fmode);
400 spin_unlock(&ci->i_ceph_lock);
401 return ceph_init_file(inode, file, fmode);
404 spin_unlock(&ci->i_ceph_lock);
406 dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
407 req = prepare_open_request(inode->i_sb, flags, 0);
412 req->r_inode = inode;
416 err = ceph_mdsc_do_request(mdsc, NULL, req);
418 err = ceph_init_file(inode, file, req->r_fmode);
419 ceph_mdsc_put_request(req);
420 dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
425 /* Clone the layout from a synchronous create, if the dir now has Dc caps */
427 cache_file_layout(struct inode *dst, struct inode *src)
429 struct ceph_inode_info *cdst = ceph_inode(dst);
430 struct ceph_inode_info *csrc = ceph_inode(src);
432 spin_lock(&cdst->i_ceph_lock);
433 if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) &&
434 !ceph_file_layout_is_valid(&cdst->i_cached_layout)) {
435 memcpy(&cdst->i_cached_layout, &csrc->i_layout,
436 sizeof(cdst->i_cached_layout));
437 rcu_assign_pointer(cdst->i_cached_layout.pool_ns,
438 ceph_try_get_string(csrc->i_layout.pool_ns));
440 spin_unlock(&cdst->i_ceph_lock);
444 * Try to set up an async create. We need caps, a file layout, and inode number,
445 * and either a lease on the dentry or complete dir info. If any of those
446 * criteria are not satisfied, then return false and the caller can go
449 static int try_prep_async_create(struct inode *dir, struct dentry *dentry,
450 struct ceph_file_layout *lo, u64 *pino)
452 struct ceph_inode_info *ci = ceph_inode(dir);
453 struct ceph_dentry_info *di = ceph_dentry(dentry);
454 int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
457 spin_lock(&ci->i_ceph_lock);
458 /* No auth cap means no chance for Dc caps */
462 /* Any delegated inos? */
463 if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos))
466 if (!ceph_file_layout_is_valid(&ci->i_cached_layout))
469 if ((__ceph_caps_issued(ci, NULL) & want) != want)
472 if (d_in_lookup(dentry)) {
473 if (!__ceph_dir_is_complete(ci))
475 spin_lock(&dentry->d_lock);
476 di->lease_shared_gen = atomic_read(&ci->i_shared_gen);
477 spin_unlock(&dentry->d_lock);
478 } else if (atomic_read(&ci->i_shared_gen) !=
479 READ_ONCE(di->lease_shared_gen)) {
483 ino = ceph_get_deleg_ino(ci->i_auth_cap->session);
488 ceph_take_cap_refs(ci, want, false);
489 memcpy(lo, &ci->i_cached_layout, sizeof(*lo));
490 rcu_assign_pointer(lo->pool_ns,
491 ceph_try_get_string(ci->i_cached_layout.pool_ns));
494 spin_unlock(&ci->i_ceph_lock);
498 static void restore_deleg_ino(struct inode *dir, u64 ino)
500 struct ceph_inode_info *ci = ceph_inode(dir);
501 struct ceph_mds_session *s = NULL;
503 spin_lock(&ci->i_ceph_lock);
505 s = ceph_get_mds_session(ci->i_auth_cap->session);
506 spin_unlock(&ci->i_ceph_lock);
508 int err = ceph_restore_deleg_ino(s, ino);
510 pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n",
512 ceph_put_mds_session(s);
516 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
517 struct ceph_mds_request *req)
519 int result = req->r_err ? req->r_err :
520 le32_to_cpu(req->r_reply_info.head->result);
522 if (result == -EJUKEBOX)
525 mapping_set_error(req->r_parent->i_mapping, result);
528 struct dentry *dentry = req->r_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 /* FIXME: start returning I/O errors on all accesses? */
539 pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n",
540 base, IS_ERR(path) ? "<<bad>>" : path, result);
541 ceph_mdsc_free_path(path, pathlen);
544 if (req->r_target_inode) {
545 struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
546 u64 ino = ceph_vino(req->r_target_inode).ino;
548 if (req->r_deleg_ino != ino)
549 pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n",
550 __func__, req->r_err, req->r_deleg_ino, ino);
551 mapping_set_error(req->r_target_inode->i_mapping, result);
553 spin_lock(&ci->i_ceph_lock);
554 if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
555 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
556 wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
558 ceph_kick_flushing_inode_caps(req->r_session, ci);
559 spin_unlock(&ci->i_ceph_lock);
561 pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__,
565 ceph_mdsc_release_dir_caps(req);
568 static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
569 struct file *file, umode_t mode,
570 struct ceph_mds_request *req,
571 struct ceph_acl_sec_ctx *as_ctx,
572 struct ceph_file_layout *lo)
576 struct ceph_mds_reply_inode in = { };
577 struct ceph_mds_reply_info_in iinfo = { .in = &in };
578 struct ceph_inode_info *ci = ceph_inode(dir);
580 struct timespec64 now;
581 struct ceph_vino vino = { .ino = req->r_deleg_ino,
582 .snap = CEPH_NOSNAP };
584 ktime_get_real_ts64(&now);
586 inode = ceph_get_inode(dentry->d_sb, vino);
588 return PTR_ERR(inode);
590 iinfo.inline_version = CEPH_INLINE_NONE;
591 iinfo.change_attr = 1;
592 ceph_encode_timespec64(&iinfo.btime, &now);
594 iinfo.xattr_len = ARRAY_SIZE(xattr_buf);
595 iinfo.xattr_data = xattr_buf;
596 memset(iinfo.xattr_data, 0, iinfo.xattr_len);
598 in.ino = cpu_to_le64(vino.ino);
599 in.snapid = cpu_to_le64(CEPH_NOSNAP);
600 in.version = cpu_to_le64(1); // ???
601 in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
602 in.cap.cap_id = cpu_to_le64(1);
603 in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
604 in.cap.flags = CEPH_CAP_FLAG_AUTH;
605 in.ctime = in.mtime = in.atime = iinfo.btime;
606 in.mode = cpu_to_le32((u32)mode);
607 in.truncate_seq = cpu_to_le32(1);
608 in.truncate_size = cpu_to_le64(-1ULL);
609 in.xattr_version = cpu_to_le64(1);
610 in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid()));
611 in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_mode & S_ISGID ?
612 dir->i_gid : current_fsgid()));
613 in.nlink = cpu_to_le32(1);
614 in.max_size = cpu_to_le64(lo->stripe_unit);
616 ceph_file_layout_to_legacy(lo, &in.layout);
618 ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
621 dout("%s failed to fill inode: %d\n", __func__, ret);
622 ceph_dir_clear_complete(dir);
623 if (!d_unhashed(dentry))
625 if (inode->i_state & I_NEW)
626 discard_new_inode(inode);
630 dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__,
631 vino.ino, ceph_ino(dir), dentry->d_name.name);
632 ceph_dir_clear_ordered(dir);
633 ceph_init_inode_acls(inode, as_ctx);
634 if (inode->i_state & I_NEW) {
636 * If it's not I_NEW, then someone created this before
637 * we got here. Assume the server is aware of it at
638 * that point and don't worry about setting
639 * CEPH_I_ASYNC_CREATE.
641 ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE;
642 unlock_new_inode(inode);
644 if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
645 if (!d_unhashed(dentry))
647 dn = d_splice_alias(inode, dentry);
648 WARN_ON_ONCE(dn && dn != dentry);
650 file->f_mode |= FMODE_CREATED;
651 ret = finish_open(file, dentry, ceph_open);
657 * Do a lookup + open with a single request. If we get a non-existent
658 * file or symlink, return 1 so the VFS can retry.
660 int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
661 struct file *file, unsigned flags, umode_t mode)
663 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
664 struct ceph_mds_client *mdsc = fsc->mdsc;
665 struct ceph_mds_request *req;
667 struct ceph_acl_sec_ctx as_ctx = {};
668 bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS);
672 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
674 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
676 if (dentry->d_name.len > NAME_MAX)
677 return -ENAMETOOLONG;
679 if (flags & O_CREAT) {
680 if (ceph_quota_is_max_files_exceeded(dir))
682 err = ceph_pre_init_acls(dir, &mode, &as_ctx);
685 err = ceph_security_init_secctx(dentry, mode, &as_ctx);
688 } else if (!d_in_lookup(dentry)) {
689 /* If it's not being looked up, it's negative */
694 req = prepare_open_request(dir->i_sb, flags, mode);
699 req->r_dentry = dget(dentry);
701 mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
702 if (ceph_security_xattr_wanted(dir))
703 mask |= CEPH_CAP_XATTR_SHARED;
704 req->r_args.open.mask = cpu_to_le32(mask);
707 if (flags & O_CREAT) {
708 struct ceph_file_layout lo;
710 req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;
711 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
712 if (as_ctx.pagelist) {
713 req->r_pagelist = as_ctx.pagelist;
714 as_ctx.pagelist = NULL;
718 try_prep_async_create(dir, dentry, &lo,
719 &req->r_deleg_ino))) {
720 set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
721 req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL);
722 req->r_callback = ceph_async_create_cb;
723 err = ceph_mdsc_submit_request(mdsc, dir, req);
725 err = ceph_finish_async_create(dir, dentry,
728 } else if (err == -EJUKEBOX) {
729 restore_deleg_ino(dir, req->r_deleg_ino);
730 ceph_mdsc_put_request(req);
738 set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
739 err = ceph_mdsc_do_request(mdsc,
740 (flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
742 dentry = ceph_handle_snapdir(req, dentry, err);
743 if (IS_ERR(dentry)) {
744 err = PTR_ERR(dentry);
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;
871 req = ceph_osdc_new_request(osdc, &ci->i_layout,
872 ci->i_vino, off, &len, 0, 1,
873 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
874 NULL, ci->i_truncate_seq,
875 ci->i_truncate_size, false);
881 more = len < iov_iter_count(to);
883 num_pages = calc_pages_for(off, len);
884 page_off = off & ~PAGE_MASK;
885 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
887 ceph_osdc_put_request(req);
888 ret = PTR_ERR(pages);
892 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off,
894 ret = ceph_osdc_start_request(osdc, req, false);
896 ret = ceph_osdc_wait_request(osdc, req);
898 ceph_update_read_metrics(&fsc->mdsc->metric,
899 req->r_start_latency,
903 ceph_osdc_put_request(req);
905 i_size = i_size_read(inode);
906 dout("sync_read %llu~%llu got %zd i_size %llu%s\n",
907 off, len, ret, i_size, (more ? " MORE" : ""));
911 if (ret >= 0 && ret < len && (off + ret < i_size)) {
912 int zlen = min(len - ret, i_size - off - ret);
913 int zoff = page_off + ret;
914 dout("sync_read zero gap %llu~%llu\n",
915 off + ret, off + ret + zlen);
916 ceph_zero_page_vector_range(zoff, zlen, pages);
921 left = ret > 0 ? ret : 0;
924 page_off = off & ~PAGE_MASK;
925 len = min_t(size_t, left, PAGE_SIZE - page_off);
926 SetPageUptodate(pages[idx]);
927 copied = copy_page_to_iter(pages[idx++],
936 ceph_release_page_vector(pages, num_pages);
939 if (ret == -EBLOCKLISTED)
940 fsc->blocklisted = true;
944 if (off >= i_size || !more)
948 if (off > iocb->ki_pos) {
950 iov_iter_count(to) > 0 && off >= i_size_read(inode))
951 *retry_op = CHECK_EOF;
952 ret = off - iocb->ki_pos;
956 dout("sync_read result %zd retry_op %d\n", ret, *retry_op);
960 struct ceph_aio_request {
966 struct list_head osd_reqs;
968 atomic_t pending_reqs;
969 struct timespec64 mtime;
970 struct ceph_cap_flush *prealloc_cf;
973 struct ceph_aio_work {
974 struct work_struct work;
975 struct ceph_osd_request *req;
978 static void ceph_aio_retry_work(struct work_struct *work);
980 static void ceph_aio_complete(struct inode *inode,
981 struct ceph_aio_request *aio_req)
983 struct ceph_inode_info *ci = ceph_inode(inode);
986 if (!atomic_dec_and_test(&aio_req->pending_reqs))
989 if (aio_req->iocb->ki_flags & IOCB_DIRECT)
990 inode_dio_end(inode);
992 ret = aio_req->error;
994 ret = aio_req->total_len;
996 dout("ceph_aio_complete %p rc %d\n", inode, ret);
998 if (ret >= 0 && aio_req->write) {
1001 loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
1002 if (endoff > i_size_read(inode)) {
1003 if (ceph_inode_set_size(inode, endoff))
1004 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1007 spin_lock(&ci->i_ceph_lock);
1008 ci->i_inline_version = CEPH_INLINE_NONE;
1009 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1010 &aio_req->prealloc_cf);
1011 spin_unlock(&ci->i_ceph_lock);
1013 __mark_inode_dirty(inode, dirty);
1017 ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
1020 aio_req->iocb->ki_complete(aio_req->iocb, ret, 0);
1022 ceph_free_cap_flush(aio_req->prealloc_cf);
1026 static void ceph_aio_complete_req(struct ceph_osd_request *req)
1028 int rc = req->r_result;
1029 struct inode *inode = req->r_inode;
1030 struct ceph_aio_request *aio_req = req->r_priv;
1031 struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
1032 struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric;
1034 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS);
1035 BUG_ON(!osd_data->num_bvecs);
1037 dout("ceph_aio_complete_req %p rc %d bytes %u\n",
1038 inode, rc, osd_data->bvec_pos.iter.bi_size);
1040 if (rc == -EOLDSNAPC) {
1041 struct ceph_aio_work *aio_work;
1042 BUG_ON(!aio_req->write);
1044 aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS);
1046 INIT_WORK(&aio_work->work, ceph_aio_retry_work);
1047 aio_work->req = req;
1048 queue_work(ceph_inode_to_client(inode)->inode_wq,
1053 } else if (!aio_req->write) {
1056 if (rc >= 0 && osd_data->bvec_pos.iter.bi_size > rc) {
1058 int zlen = osd_data->bvec_pos.iter.bi_size - rc;
1061 * If read is satisfied by single OSD request,
1062 * it can pass EOF. Otherwise read is within
1065 if (aio_req->num_reqs == 1) {
1066 loff_t i_size = i_size_read(inode);
1067 loff_t endoff = aio_req->iocb->ki_pos + rc;
1068 if (endoff < i_size)
1069 zlen = min_t(size_t, zlen,
1071 aio_req->total_len = rc + zlen;
1074 iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs,
1075 osd_data->num_bvecs,
1076 osd_data->bvec_pos.iter.bi_size);
1077 iov_iter_advance(&i, rc);
1078 iov_iter_zero(zlen, &i);
1082 /* r_start_latency == 0 means the request was not submitted */
1083 if (req->r_start_latency) {
1085 ceph_update_write_metrics(metric, req->r_start_latency,
1086 req->r_end_latency, rc);
1088 ceph_update_read_metrics(metric, req->r_start_latency,
1089 req->r_end_latency, rc);
1092 put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
1093 aio_req->should_dirty);
1094 ceph_osdc_put_request(req);
1097 cmpxchg(&aio_req->error, 0, rc);
1099 ceph_aio_complete(inode, aio_req);
1103 static void ceph_aio_retry_work(struct work_struct *work)
1105 struct ceph_aio_work *aio_work =
1106 container_of(work, struct ceph_aio_work, work);
1107 struct ceph_osd_request *orig_req = aio_work->req;
1108 struct ceph_aio_request *aio_req = orig_req->r_priv;
1109 struct inode *inode = orig_req->r_inode;
1110 struct ceph_inode_info *ci = ceph_inode(inode);
1111 struct ceph_snap_context *snapc;
1112 struct ceph_osd_request *req;
1115 spin_lock(&ci->i_ceph_lock);
1116 if (__ceph_have_pending_cap_snap(ci)) {
1117 struct ceph_cap_snap *capsnap =
1118 list_last_entry(&ci->i_cap_snaps,
1119 struct ceph_cap_snap,
1121 snapc = ceph_get_snap_context(capsnap->context);
1123 BUG_ON(!ci->i_head_snapc);
1124 snapc = ceph_get_snap_context(ci->i_head_snapc);
1126 spin_unlock(&ci->i_ceph_lock);
1128 req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1,
1136 req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1137 ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc);
1138 ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid);
1140 req->r_ops[0] = orig_req->r_ops[0];
1142 req->r_mtime = aio_req->mtime;
1143 req->r_data_offset = req->r_ops[0].extent.offset;
1145 ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
1147 ceph_osdc_put_request(req);
1152 ceph_osdc_put_request(orig_req);
1154 req->r_callback = ceph_aio_complete_req;
1155 req->r_inode = inode;
1156 req->r_priv = aio_req;
1158 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1161 req->r_result = ret;
1162 ceph_aio_complete_req(req);
1165 ceph_put_snap_context(snapc);
1170 ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
1171 struct ceph_snap_context *snapc,
1172 struct ceph_cap_flush **pcf)
1174 struct file *file = iocb->ki_filp;
1175 struct inode *inode = file_inode(file);
1176 struct ceph_inode_info *ci = ceph_inode(inode);
1177 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1178 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1179 struct ceph_vino vino;
1180 struct ceph_osd_request *req;
1181 struct bio_vec *bvecs;
1182 struct ceph_aio_request *aio_req = NULL;
1186 struct timespec64 mtime = current_time(inode);
1187 size_t count = iov_iter_count(iter);
1188 loff_t pos = iocb->ki_pos;
1189 bool write = iov_iter_rw(iter) == WRITE;
1190 bool should_dirty = !write && iter_is_iovec(iter);
1192 if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1195 dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
1196 (write ? "write" : "read"), file, pos, (unsigned)count,
1197 snapc, snapc ? snapc->seq : 0);
1200 int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
1202 (pos + count - 1) >> PAGE_SHIFT);
1204 dout("invalidate_inode_pages2_range returned %d\n", ret2);
1206 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1208 flags = CEPH_OSD_FLAG_READ;
1211 while (iov_iter_count(iter) > 0) {
1212 u64 size = iov_iter_count(iter);
1216 size = min_t(u64, size, fsc->mount_options->wsize);
1218 size = min_t(u64, size, fsc->mount_options->rsize);
1220 vino = ceph_vino(inode);
1221 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1222 vino, pos, &size, 0,
1224 write ? CEPH_OSD_OP_WRITE :
1228 ci->i_truncate_size,
1235 len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages);
1237 ceph_osdc_put_request(req);
1242 osd_req_op_extent_update(req, 0, len);
1245 * To simplify error handling, allow AIO when IO within i_size
1246 * or IO can be satisfied by single OSD request.
1248 if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) &&
1249 (len == count || pos + count <= i_size_read(inode))) {
1250 aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL);
1252 aio_req->iocb = iocb;
1253 aio_req->write = write;
1254 aio_req->should_dirty = should_dirty;
1255 INIT_LIST_HEAD(&aio_req->osd_reqs);
1257 aio_req->mtime = mtime;
1258 swap(aio_req->prealloc_cf, *pcf);
1266 * throw out any page cache pages in this range. this
1269 truncate_inode_pages_range(inode->i_mapping, pos,
1270 PAGE_ALIGN(pos + len) - 1);
1272 req->r_mtime = mtime;
1275 osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
1278 aio_req->total_len += len;
1279 aio_req->num_reqs++;
1280 atomic_inc(&aio_req->pending_reqs);
1282 req->r_callback = ceph_aio_complete_req;
1283 req->r_inode = inode;
1284 req->r_priv = aio_req;
1285 list_add_tail(&req->r_private_item, &aio_req->osd_reqs);
1291 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1293 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1296 ceph_update_write_metrics(metric, req->r_start_latency,
1297 req->r_end_latency, ret);
1299 ceph_update_read_metrics(metric, req->r_start_latency,
1300 req->r_end_latency, ret);
1302 size = i_size_read(inode);
1306 if (ret >= 0 && ret < len && pos + ret < size) {
1308 int zlen = min_t(size_t, len - ret,
1311 iov_iter_bvec(&i, READ, bvecs, num_pages, len);
1312 iov_iter_advance(&i, ret);
1313 iov_iter_zero(zlen, &i);
1320 put_bvecs(bvecs, num_pages, should_dirty);
1321 ceph_osdc_put_request(req);
1326 if (!write && pos >= size)
1329 if (write && pos > size) {
1330 if (ceph_inode_set_size(inode, pos))
1331 ceph_check_caps(ceph_inode(inode),
1332 CHECK_CAPS_AUTHONLY,
1338 LIST_HEAD(osd_reqs);
1340 if (aio_req->num_reqs == 0) {
1345 ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR :
1348 list_splice(&aio_req->osd_reqs, &osd_reqs);
1349 inode_dio_begin(inode);
1350 while (!list_empty(&osd_reqs)) {
1351 req = list_first_entry(&osd_reqs,
1352 struct ceph_osd_request,
1354 list_del_init(&req->r_private_item);
1356 ret = ceph_osdc_start_request(req->r_osdc,
1359 req->r_result = ret;
1360 ceph_aio_complete_req(req);
1363 return -EIOCBQUEUED;
1366 if (ret != -EOLDSNAPC && pos > iocb->ki_pos) {
1367 ret = pos - iocb->ki_pos;
1374 * Synchronous write, straight from __user pointer or user pages.
1376 * If write spans object boundary, just do multiple writes. (For a
1377 * correct atomic write, we should e.g. take write locks on all
1378 * objects, rollback on failure, etc.)
1381 ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
1382 struct ceph_snap_context *snapc)
1384 struct file *file = iocb->ki_filp;
1385 struct inode *inode = file_inode(file);
1386 struct ceph_inode_info *ci = ceph_inode(inode);
1387 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1388 struct ceph_vino vino;
1389 struct ceph_osd_request *req;
1390 struct page **pages;
1396 bool check_caps = false;
1397 struct timespec64 mtime = current_time(inode);
1398 size_t count = iov_iter_count(from);
1400 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1403 dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
1404 file, pos, (unsigned)count, snapc, snapc->seq);
1406 ret = filemap_write_and_wait_range(inode->i_mapping,
1407 pos, pos + count - 1);
1411 ret = invalidate_inode_pages2_range(inode->i_mapping,
1413 (pos + count - 1) >> PAGE_SHIFT);
1415 dout("invalidate_inode_pages2_range returned %d\n", ret);
1417 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1419 while ((len = iov_iter_count(from)) > 0) {
1423 vino = ceph_vino(inode);
1424 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1425 vino, pos, &len, 0, 1,
1426 CEPH_OSD_OP_WRITE, flags, snapc,
1428 ci->i_truncate_size,
1436 * write from beginning of first page,
1437 * regardless of io alignment
1439 num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
1441 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1442 if (IS_ERR(pages)) {
1443 ret = PTR_ERR(pages);
1448 for (n = 0; n < num_pages; n++) {
1449 size_t plen = min_t(size_t, left, PAGE_SIZE);
1450 ret = copy_page_from_iter(pages[n], 0, plen, from);
1459 ceph_release_page_vector(pages, num_pages);
1463 req->r_inode = inode;
1465 osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
1468 req->r_mtime = mtime;
1469 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1471 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1473 ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency,
1474 req->r_end_latency, ret);
1476 ceph_osdc_put_request(req);
1478 ceph_set_error_write(ci);
1482 ceph_clear_error_write(ci);
1485 if (pos > i_size_read(inode)) {
1486 check_caps = ceph_inode_set_size(inode, pos);
1488 ceph_check_caps(ceph_inode(inode),
1489 CHECK_CAPS_AUTHONLY,
1495 if (ret != -EOLDSNAPC && written > 0) {
1503 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1504 * Atomically grab references, so that those bits are not released
1505 * back to the MDS mid-read.
1507 * Hmm, the sync read case isn't actually async... should it be?
1509 static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
1511 struct file *filp = iocb->ki_filp;
1512 struct ceph_file_info *fi = filp->private_data;
1513 size_t len = iov_iter_count(to);
1514 struct inode *inode = file_inode(filp);
1515 struct ceph_inode_info *ci = ceph_inode(inode);
1516 bool direct_lock = iocb->ki_flags & IOCB_DIRECT;
1519 int retry_op = 0, read = 0;
1522 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1523 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode);
1526 ceph_start_io_direct(inode);
1528 ceph_start_io_read(inode);
1530 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1531 want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1533 want = CEPH_CAP_FILE_CACHE;
1534 ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got);
1536 if (iocb->ki_flags & IOCB_DIRECT)
1537 ceph_end_io_direct(inode);
1539 ceph_end_io_read(inode);
1543 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1544 (iocb->ki_flags & IOCB_DIRECT) ||
1545 (fi->flags & CEPH_F_SYNC)) {
1547 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1548 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1549 ceph_cap_string(got));
1551 if (ci->i_inline_version == CEPH_INLINE_NONE) {
1552 if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) {
1553 ret = ceph_direct_read_write(iocb, to,
1555 if (ret >= 0 && ret < len)
1556 retry_op = CHECK_EOF;
1558 ret = ceph_sync_read(iocb, to, &retry_op);
1561 retry_op = READ_INLINE;
1564 CEPH_DEFINE_RW_CONTEXT(rw_ctx, got);
1565 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1566 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1567 ceph_cap_string(got));
1568 ceph_add_rw_context(fi, &rw_ctx);
1569 ret = generic_file_read_iter(iocb, to);
1570 ceph_del_rw_context(fi, &rw_ctx);
1573 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1574 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
1575 ceph_put_cap_refs(ci, got);
1578 ceph_end_io_direct(inode);
1580 ceph_end_io_read(inode);
1582 if (retry_op > HAVE_RETRIED && ret >= 0) {
1584 struct page *page = NULL;
1586 if (retry_op == READ_INLINE) {
1587 page = __page_cache_alloc(GFP_KERNEL);
1592 statret = __ceph_do_getattr(inode, page,
1593 CEPH_STAT_CAP_INLINE_DATA, !!page);
1597 if (statret == -ENODATA) {
1598 BUG_ON(retry_op != READ_INLINE);
1604 i_size = i_size_read(inode);
1605 if (retry_op == READ_INLINE) {
1606 BUG_ON(ret > 0 || read > 0);
1607 if (iocb->ki_pos < i_size &&
1608 iocb->ki_pos < PAGE_SIZE) {
1609 loff_t end = min_t(loff_t, i_size,
1610 iocb->ki_pos + len);
1611 end = min_t(loff_t, end, PAGE_SIZE);
1613 zero_user_segment(page, statret, end);
1614 ret = copy_page_to_iter(page,
1615 iocb->ki_pos & ~PAGE_MASK,
1616 end - iocb->ki_pos, to);
1617 iocb->ki_pos += ret;
1620 if (iocb->ki_pos < i_size && read < len) {
1621 size_t zlen = min_t(size_t, len - read,
1622 i_size - iocb->ki_pos);
1623 ret = iov_iter_zero(zlen, to);
1624 iocb->ki_pos += ret;
1627 __free_pages(page, 0);
1631 /* hit EOF or hole? */
1632 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
1634 dout("sync_read hit hole, ppos %lld < size %lld"
1635 ", reading more\n", iocb->ki_pos, i_size);
1639 retry_op = HAVE_RETRIED;
1651 * Take cap references to avoid releasing caps to MDS mid-write.
1653 * If we are synchronous, and write with an old snap context, the OSD
1654 * may return EOLDSNAPC. In that case, retry the write.. _after_
1655 * dropping our cap refs and allowing the pending snap to logically
1656 * complete _before_ this write occurs.
1658 * If we are near ENOSPC, write synchronously.
1660 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
1662 struct file *file = iocb->ki_filp;
1663 struct ceph_file_info *fi = file->private_data;
1664 struct inode *inode = file_inode(file);
1665 struct ceph_inode_info *ci = ceph_inode(inode);
1666 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1667 struct ceph_osd_client *osdc = &fsc->client->osdc;
1668 struct ceph_cap_flush *prealloc_cf;
1669 ssize_t count, written = 0;
1671 bool direct_lock = false;
1675 loff_t limit = max(i_size_read(inode), fsc->max_file_size);
1677 if (ceph_snap(inode) != CEPH_NOSNAP)
1680 prealloc_cf = ceph_alloc_cap_flush();
1684 if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT)
1689 ceph_start_io_direct(inode);
1691 ceph_start_io_write(inode);
1693 /* We can write back this queue in page reclaim */
1694 current->backing_dev_info = inode_to_bdi(inode);
1696 if (iocb->ki_flags & IOCB_APPEND) {
1697 err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1702 err = generic_write_checks(iocb, from);
1707 if (unlikely(pos >= limit)) {
1711 iov_iter_truncate(from, limit - pos);
1714 count = iov_iter_count(from);
1715 if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
1720 err = file_remove_privs(file);
1724 err = file_update_time(file);
1728 inode_inc_iversion_raw(inode);
1730 if (ci->i_inline_version != CEPH_INLINE_NONE) {
1731 err = ceph_uninline_data(file, NULL);
1736 down_read(&osdc->lock);
1737 map_flags = osdc->osdmap->flags;
1738 pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id);
1739 up_read(&osdc->lock);
1740 if ((map_flags & CEPH_OSDMAP_FULL) ||
1741 (pool_flags & CEPH_POOL_FLAG_FULL)) {
1746 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1747 inode, ceph_vinop(inode), pos, count, i_size_read(inode));
1748 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1749 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
1751 want = CEPH_CAP_FILE_BUFFER;
1753 err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got);
1757 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1758 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
1760 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1761 (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
1762 (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
1763 struct ceph_snap_context *snapc;
1764 struct iov_iter data;
1766 spin_lock(&ci->i_ceph_lock);
1767 if (__ceph_have_pending_cap_snap(ci)) {
1768 struct ceph_cap_snap *capsnap =
1769 list_last_entry(&ci->i_cap_snaps,
1770 struct ceph_cap_snap,
1772 snapc = ceph_get_snap_context(capsnap->context);
1774 BUG_ON(!ci->i_head_snapc);
1775 snapc = ceph_get_snap_context(ci->i_head_snapc);
1777 spin_unlock(&ci->i_ceph_lock);
1779 /* we might need to revert back to that point */
1781 if (iocb->ki_flags & IOCB_DIRECT)
1782 written = ceph_direct_read_write(iocb, &data, snapc,
1785 written = ceph_sync_write(iocb, &data, pos, snapc);
1787 ceph_end_io_direct(inode);
1789 ceph_end_io_write(inode);
1791 iov_iter_advance(from, written);
1792 ceph_put_snap_context(snapc);
1795 * No need to acquire the i_truncate_mutex. Because
1796 * the MDS revokes Fwb caps before sending truncate
1797 * message to us. We can't get Fwb cap while there
1798 * are pending vmtruncate. So write and vmtruncate
1799 * can not run at the same time
1801 written = generic_perform_write(file, from, pos);
1802 if (likely(written >= 0))
1803 iocb->ki_pos = pos + written;
1804 ceph_end_io_write(inode);
1810 spin_lock(&ci->i_ceph_lock);
1811 ci->i_inline_version = CEPH_INLINE_NONE;
1812 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1814 spin_unlock(&ci->i_ceph_lock);
1816 __mark_inode_dirty(inode, dirty);
1817 if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
1818 ceph_check_caps(ci, 0, NULL);
1821 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1822 inode, ceph_vinop(inode), pos, (unsigned)count,
1823 ceph_cap_string(got));
1824 ceph_put_cap_refs(ci, got);
1826 if (written == -EOLDSNAPC) {
1827 dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
1828 inode, ceph_vinop(inode), pos, (unsigned)count);
1833 if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
1834 (pool_flags & CEPH_POOL_FLAG_NEARFULL))
1835 iocb->ki_flags |= IOCB_DSYNC;
1836 written = generic_write_sync(iocb, written);
1842 ceph_end_io_direct(inode);
1844 ceph_end_io_write(inode);
1846 ceph_free_cap_flush(prealloc_cf);
1847 current->backing_dev_info = NULL;
1848 return written ? written : err;
1852 * llseek. be sure to verify file size on SEEK_END.
1854 static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
1856 struct inode *inode = file->f_mapping->host;
1857 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1863 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
1864 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1869 i_size = i_size_read(inode);
1876 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1877 * position-querying operation. Avoid rewriting the "same"
1878 * f_pos value back to the file because a concurrent read(),
1879 * write() or lseek() might have altered it
1885 offset += file->f_pos;
1888 if (offset < 0 || offset >= i_size) {
1894 if (offset < 0 || offset >= i_size) {
1902 ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size));
1905 inode_unlock(inode);
1909 static inline void ceph_zero_partial_page(
1910 struct inode *inode, loff_t offset, unsigned size)
1913 pgoff_t index = offset >> PAGE_SHIFT;
1915 page = find_lock_page(inode->i_mapping, index);
1917 wait_on_page_writeback(page);
1918 zero_user(page, offset & (PAGE_SIZE - 1), size);
1924 static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
1927 loff_t nearly = round_up(offset, PAGE_SIZE);
1928 if (offset < nearly) {
1929 loff_t size = nearly - offset;
1932 ceph_zero_partial_page(inode, offset, size);
1936 if (length >= PAGE_SIZE) {
1937 loff_t size = round_down(length, PAGE_SIZE);
1938 truncate_pagecache_range(inode, offset, offset + size - 1);
1943 ceph_zero_partial_page(inode, offset, length);
1946 static int ceph_zero_partial_object(struct inode *inode,
1947 loff_t offset, loff_t *length)
1949 struct ceph_inode_info *ci = ceph_inode(inode);
1950 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1951 struct ceph_osd_request *req;
1957 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
1960 op = CEPH_OSD_OP_ZERO;
1963 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1967 CEPH_OSD_FLAG_WRITE,
1974 req->r_mtime = inode->i_mtime;
1975 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1977 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1981 ceph_osdc_put_request(req);
1987 static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
1990 struct ceph_inode_info *ci = ceph_inode(inode);
1991 s32 stripe_unit = ci->i_layout.stripe_unit;
1992 s32 stripe_count = ci->i_layout.stripe_count;
1993 s32 object_size = ci->i_layout.object_size;
1994 u64 object_set_size = object_size * stripe_count;
1997 /* round offset up to next period boundary */
1998 nearly = offset + object_set_size - 1;
2000 nearly -= do_div(t, object_set_size);
2002 while (length && offset < nearly) {
2003 loff_t size = length;
2004 ret = ceph_zero_partial_object(inode, offset, &size);
2010 while (length >= object_set_size) {
2012 loff_t pos = offset;
2013 for (i = 0; i < stripe_count; ++i) {
2014 ret = ceph_zero_partial_object(inode, pos, NULL);
2019 offset += object_set_size;
2020 length -= object_set_size;
2023 loff_t size = length;
2024 ret = ceph_zero_partial_object(inode, offset, &size);
2033 static long ceph_fallocate(struct file *file, int mode,
2034 loff_t offset, loff_t length)
2036 struct ceph_file_info *fi = file->private_data;
2037 struct inode *inode = file_inode(file);
2038 struct ceph_inode_info *ci = ceph_inode(inode);
2039 struct ceph_cap_flush *prealloc_cf;
2046 if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2049 if (!S_ISREG(inode->i_mode))
2052 prealloc_cf = ceph_alloc_cap_flush();
2058 if (ceph_snap(inode) != CEPH_NOSNAP) {
2063 if (ci->i_inline_version != CEPH_INLINE_NONE) {
2064 ret = ceph_uninline_data(file, NULL);
2069 size = i_size_read(inode);
2071 /* Are we punching a hole beyond EOF? */
2074 if ((offset + length) > size)
2075 length = size - offset;
2077 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2078 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
2080 want = CEPH_CAP_FILE_BUFFER;
2082 ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got);
2086 ceph_zero_pagecache_range(inode, offset, length);
2087 ret = ceph_zero_objects(inode, offset, length);
2090 spin_lock(&ci->i_ceph_lock);
2091 ci->i_inline_version = CEPH_INLINE_NONE;
2092 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2094 spin_unlock(&ci->i_ceph_lock);
2096 __mark_inode_dirty(inode, dirty);
2099 ceph_put_cap_refs(ci, got);
2101 inode_unlock(inode);
2102 ceph_free_cap_flush(prealloc_cf);
2107 * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for
2108 * src_ci. Two attempts are made to obtain both caps, and an error is return if
2109 * this fails; zero is returned on success.
2111 static int get_rd_wr_caps(struct file *src_filp, int *src_got,
2112 struct file *dst_filp,
2113 loff_t dst_endoff, int *dst_got)
2116 bool retrying = false;
2119 ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
2120 dst_endoff, dst_got);
2125 * Since we're already holding the FILE_WR capability for the dst file,
2126 * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some
2127 * retry dance instead to try to get both capabilities.
2129 ret = ceph_try_get_caps(file_inode(src_filp),
2130 CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED,
2133 /* Start by dropping dst_ci caps and getting src_ci caps */
2134 ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got);
2137 /* ceph_try_get_caps masks EAGAIN */
2141 ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD,
2142 CEPH_CAP_FILE_SHARED, -1, src_got);
2145 /*... drop src_ci caps too, and retry */
2146 ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got);
2153 static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got,
2154 struct ceph_inode_info *dst_ci, int dst_got)
2156 ceph_put_cap_refs(src_ci, src_got);
2157 ceph_put_cap_refs(dst_ci, dst_got);
2161 * This function does several size-related checks, returning an error if:
2162 * - source file is smaller than off+len
2163 * - destination file size is not OK (inode_newsize_ok())
2164 * - max bytes quotas is exceeded
2166 static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
2167 loff_t src_off, loff_t dst_off, size_t len)
2169 loff_t size, endoff;
2171 size = i_size_read(src_inode);
2173 * Don't copy beyond source file EOF. Instead of simply setting length
2174 * to (size - src_off), just drop to VFS default implementation, as the
2175 * local i_size may be stale due to other clients writing to the source
2178 if (src_off + len > size) {
2179 dout("Copy beyond EOF (%llu + %zu > %llu)\n",
2180 src_off, len, size);
2183 size = i_size_read(dst_inode);
2185 endoff = dst_off + len;
2186 if (inode_newsize_ok(dst_inode, endoff))
2189 if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff))
2195 static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
2196 struct ceph_inode_info *dst_ci, u64 *dst_off,
2197 struct ceph_fs_client *fsc,
2198 size_t len, unsigned int flags)
2200 struct ceph_object_locator src_oloc, dst_oloc;
2201 struct ceph_object_id src_oid, dst_oid;
2203 u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
2204 u32 src_objlen, dst_objlen;
2205 u32 object_size = src_ci->i_layout.object_size;
2208 src_oloc.pool = src_ci->i_layout.pool_id;
2209 src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
2210 dst_oloc.pool = dst_ci->i_layout.pool_id;
2211 dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
2213 while (len >= object_size) {
2214 ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
2215 object_size, &src_objnum,
2216 &src_objoff, &src_objlen);
2217 ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
2218 object_size, &dst_objnum,
2219 &dst_objoff, &dst_objlen);
2220 ceph_oid_init(&src_oid);
2221 ceph_oid_printf(&src_oid, "%llx.%08llx",
2222 src_ci->i_vino.ino, src_objnum);
2223 ceph_oid_init(&dst_oid);
2224 ceph_oid_printf(&dst_oid, "%llx.%08llx",
2225 dst_ci->i_vino.ino, dst_objnum);
2226 /* Do an object remote copy */
2227 ret = ceph_osdc_copy_from(&fsc->client->osdc,
2228 src_ci->i_vino.snap, 0,
2229 &src_oid, &src_oloc,
2230 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2231 CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
2232 &dst_oid, &dst_oloc,
2233 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2234 CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
2235 dst_ci->i_truncate_seq,
2236 dst_ci->i_truncate_size,
2237 CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
2239 if (ret == -EOPNOTSUPP) {
2240 fsc->have_copy_from2 = false;
2241 pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
2243 dout("ceph_osdc_copy_from returned %d\n", ret);
2249 bytes += object_size;
2250 *src_off += object_size;
2251 *dst_off += object_size;
2255 ceph_oloc_destroy(&src_oloc);
2256 ceph_oloc_destroy(&dst_oloc);
2260 static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
2261 struct file *dst_file, loff_t dst_off,
2262 size_t len, unsigned int flags)
2264 struct inode *src_inode = file_inode(src_file);
2265 struct inode *dst_inode = file_inode(dst_file);
2266 struct ceph_inode_info *src_ci = ceph_inode(src_inode);
2267 struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
2268 struct ceph_cap_flush *prealloc_cf;
2269 struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode);
2271 ssize_t ret = -EIO, bytes;
2272 u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
2273 u32 src_objlen, dst_objlen;
2274 int src_got = 0, dst_got = 0, err, dirty;
2276 if (src_inode->i_sb != dst_inode->i_sb) {
2277 struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode);
2279 if (ceph_fsid_compare(&src_fsc->client->fsid,
2280 &dst_fsc->client->fsid)) {
2281 dout("Copying files across clusters: src: %pU dst: %pU\n",
2282 &src_fsc->client->fsid, &dst_fsc->client->fsid);
2286 if (ceph_snap(dst_inode) != CEPH_NOSNAP)
2290 * Some of the checks below will return -EOPNOTSUPP, which will force a
2291 * fallback to the default VFS copy_file_range implementation. This is
2292 * desirable in several cases (for ex, the 'len' is smaller than the
2293 * size of the objects, or in cases where that would be more
2297 if (ceph_test_mount_opt(src_fsc, NOCOPYFROM))
2300 if (!src_fsc->have_copy_from2)
2304 * Striped file layouts require that we copy partial objects, but the
2305 * OSD copy-from operation only supports full-object copies. Limit
2306 * this to non-striped file layouts for now.
2308 if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) ||
2309 (src_ci->i_layout.stripe_count != 1) ||
2310 (dst_ci->i_layout.stripe_count != 1) ||
2311 (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) {
2312 dout("Invalid src/dst files layout\n");
2316 if (len < src_ci->i_layout.object_size)
2317 return -EOPNOTSUPP; /* no remote copy will be done */
2319 prealloc_cf = ceph_alloc_cap_flush();
2323 /* Start by sync'ing the source and destination files */
2324 ret = file_write_and_wait_range(src_file, src_off, (src_off + len));
2326 dout("failed to write src file (%zd)\n", ret);
2329 ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len));
2331 dout("failed to write dst file (%zd)\n", ret);
2336 * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other
2337 * clients may have dirty data in their caches. And OSDs know nothing
2338 * about caps, so they can't safely do the remote object copies.
2340 err = get_rd_wr_caps(src_file, &src_got,
2341 dst_file, (dst_off + len), &dst_got);
2343 dout("get_rd_wr_caps returned %d\n", err);
2348 ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len);
2352 /* Drop dst file cached pages */
2353 ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
2354 dst_off >> PAGE_SHIFT,
2355 (dst_off + len) >> PAGE_SHIFT);
2357 dout("Failed to invalidate inode pages (%zd)\n", ret);
2360 ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
2361 src_ci->i_layout.object_size,
2362 &src_objnum, &src_objoff, &src_objlen);
2363 ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
2364 dst_ci->i_layout.object_size,
2365 &dst_objnum, &dst_objoff, &dst_objlen);
2366 /* object-level offsets need to the same */
2367 if (src_objoff != dst_objoff) {
2373 * Do a manual copy if the object offset isn't object aligned.
2374 * 'src_objlen' contains the bytes left until the end of the object,
2375 * starting at the src_off
2378 dout("Initial partial copy of %u bytes\n", src_objlen);
2381 * we need to temporarily drop all caps as we'll be calling
2382 * {read,write}_iter, which will get caps again.
2384 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2385 ret = do_splice_direct(src_file, &src_off, dst_file,
2386 &dst_off, src_objlen, flags);
2387 /* Abort on short copies or on error */
2388 if (ret < src_objlen) {
2389 dout("Failed partial copy (%zd)\n", ret);
2393 err = get_rd_wr_caps(src_file, &src_got,
2394 dst_file, (dst_off + len), &dst_got);
2397 err = is_file_size_ok(src_inode, dst_inode,
2398 src_off, dst_off, len);
2403 size = i_size_read(dst_inode);
2404 bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
2405 src_fsc, len, flags);
2411 dout("Copied %zu bytes out of %zu\n", bytes, len);
2415 file_update_time(dst_file);
2416 inode_inc_iversion_raw(dst_inode);
2418 if (dst_off > size) {
2419 /* Let the MDS know about dst file size change */
2420 if (ceph_inode_set_size(dst_inode, dst_off) ||
2421 ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
2422 ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL);
2425 spin_lock(&dst_ci->i_ceph_lock);
2426 dst_ci->i_inline_version = CEPH_INLINE_NONE;
2427 dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf);
2428 spin_unlock(&dst_ci->i_ceph_lock);
2430 __mark_inode_dirty(dst_inode, dirty);
2433 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2436 * Do the final manual copy if we still have some bytes left, unless
2437 * there were errors in remote object copies (len >= object_size).
2439 if (len && (len < src_ci->i_layout.object_size)) {
2440 dout("Final partial copy of %zu bytes\n", len);
2441 bytes = do_splice_direct(src_file, &src_off, dst_file,
2442 &dst_off, len, flags);
2446 dout("Failed partial copy (%zd)\n", bytes);
2450 ceph_free_cap_flush(prealloc_cf);
2455 static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
2456 struct file *dst_file, loff_t dst_off,
2457 size_t len, unsigned int flags)
2461 ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
2464 if (ret == -EOPNOTSUPP || ret == -EXDEV)
2465 ret = generic_copy_file_range(src_file, src_off, dst_file,
2466 dst_off, len, flags);
2470 const struct file_operations ceph_file_fops = {
2472 .release = ceph_release,
2473 .llseek = ceph_llseek,
2474 .read_iter = ceph_read_iter,
2475 .write_iter = ceph_write_iter,
2477 .fsync = ceph_fsync,
2479 .setlease = simple_nosetlease,
2480 .flock = ceph_flock,
2481 .splice_read = generic_file_splice_read,
2482 .splice_write = iter_file_splice_write,
2483 .unlocked_ioctl = ceph_ioctl,
2484 .compat_ioctl = compat_ptr_ioctl,
2485 .fallocate = ceph_fallocate,
2486 .copy_file_range = ceph_copy_file_range,