1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/ceph/striper.h>
5 #include <linux/module.h>
6 #include <linux/sched.h>
7 #include <linux/slab.h>
8 #include <linux/file.h>
9 #include <linux/mount.h>
10 #include <linux/namei.h>
11 #include <linux/writeback.h>
12 #include <linux/falloc.h>
13 #include <linux/iversion.h>
14 #include <linux/ktime.h>
17 #include "mds_client.h"
22 static __le32 ceph_flags_sys2wire(u32 flags)
26 switch (flags & O_ACCMODE) {
28 wire_flags |= CEPH_O_RDONLY;
31 wire_flags |= CEPH_O_WRONLY;
34 wire_flags |= CEPH_O_RDWR;
40 #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
42 ceph_sys2wire(O_CREAT);
43 ceph_sys2wire(O_EXCL);
44 ceph_sys2wire(O_TRUNC);
45 ceph_sys2wire(O_DIRECTORY);
46 ceph_sys2wire(O_NOFOLLOW);
51 dout("unused open flags: %x\n", flags);
53 return cpu_to_le32(wire_flags);
57 * Ceph file operations
59 * Implement basic open/close functionality, and implement
62 * We implement three modes of file I/O:
63 * - buffered uses the generic_file_aio_{read,write} helpers
65 * - synchronous is used when there is multi-client read/write
66 * sharing, avoids the page cache, and synchronously waits for an
69 * - direct io takes the variant of the sync path that references
70 * user pages directly.
72 * fsync() flushes and waits on dirty pages, but just queues metadata
73 * for writeback: since the MDS can recover size and mtime there is no
74 * need to wait for MDS acknowledgement.
78 * How many pages to get in one call to iov_iter_get_pages(). This
79 * determines the size of the on-stack array used as a buffer.
81 #define ITER_GET_BVECS_PAGES 64
83 static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize,
84 struct bio_vec *bvecs)
89 if (maxsize > iov_iter_count(iter))
90 maxsize = iov_iter_count(iter);
92 while (size < maxsize) {
93 struct page *pages[ITER_GET_BVECS_PAGES];
98 bytes = iov_iter_get_pages(iter, pages, maxsize - size,
99 ITER_GET_BVECS_PAGES, &start);
101 return size ?: bytes;
103 iov_iter_advance(iter, bytes);
106 for ( ; bytes; idx++, bvec_idx++) {
107 struct bio_vec bv = {
108 .bv_page = pages[idx],
109 .bv_len = min_t(int, bytes, PAGE_SIZE - start),
113 bvecs[bvec_idx] = bv;
123 * iov_iter_get_pages() only considers one iov_iter segment, no matter
124 * what maxsize or maxpages are given. For ITER_BVEC that is a single
127 * Attempt to get up to @maxsize bytes worth of pages from @iter.
128 * Return the number of bytes in the created bio_vec array, or an error.
130 static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize,
131 struct bio_vec **bvecs, int *num_bvecs)
134 size_t orig_count = iov_iter_count(iter);
138 iov_iter_truncate(iter, maxsize);
139 npages = iov_iter_npages(iter, INT_MAX);
140 iov_iter_reexpand(iter, orig_count);
143 * __iter_get_bvecs() may populate only part of the array -- zero it
146 bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO);
150 bytes = __iter_get_bvecs(iter, maxsize, bv);
153 * No pages were pinned -- just free the array.
164 static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty)
168 for (i = 0; i < num_bvecs; i++) {
169 if (bvecs[i].bv_page) {
171 set_page_dirty_lock(bvecs[i].bv_page);
172 put_page(bvecs[i].bv_page);
179 * Prepare an open request. Preallocate ceph_cap to avoid an
180 * inopportune ENOMEM later.
182 static struct ceph_mds_request *
183 prepare_open_request(struct super_block *sb, int flags, int create_mode)
185 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb);
186 struct ceph_mds_request *req;
187 int want_auth = USE_ANY_MDS;
188 int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN;
190 if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC))
191 want_auth = USE_AUTH_MDS;
193 req = ceph_mdsc_create_request(mdsc, op, want_auth);
196 req->r_fmode = ceph_flags_to_mode(flags);
197 req->r_args.open.flags = ceph_flags_sys2wire(flags);
198 req->r_args.open.mode = cpu_to_le32(create_mode);
203 static int ceph_init_file_info(struct inode *inode, struct file *file,
204 int fmode, bool isdir)
206 struct ceph_inode_info *ci = ceph_inode(inode);
207 struct ceph_file_info *fi;
209 dout("%s %p %p 0%o (%s)\n", __func__, inode, file,
210 inode->i_mode, isdir ? "dir" : "regular");
211 BUG_ON(inode->i_fop->release != ceph_release);
214 struct ceph_dir_file_info *dfi =
215 kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
219 file->private_data = dfi;
220 fi = &dfi->file_info;
221 dfi->next_offset = 2;
222 dfi->readdir_cache_idx = -1;
224 fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
228 file->private_data = fi;
231 ceph_get_fmode(ci, fmode, 1);
234 spin_lock_init(&fi->rw_contexts_lock);
235 INIT_LIST_HEAD(&fi->rw_contexts);
236 fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen);
242 * initialize private struct file data.
243 * if we fail, clean up by dropping fmode reference on the ceph_inode
245 static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
249 switch (inode->i_mode & S_IFMT) {
251 ceph_fscache_register_inode_cookie(inode);
252 ceph_fscache_file_set_cookie(inode, file);
255 ret = ceph_init_file_info(inode, file, fmode,
256 S_ISDIR(inode->i_mode));
260 dout("init_file %p %p 0%o (symlink)\n", inode, file,
265 dout("init_file %p %p 0%o (special)\n", inode, file,
268 * we need to drop the open ref now, since we don't
269 * have .release set to ceph_release.
271 BUG_ON(inode->i_fop->release == ceph_release);
273 /* call the proper open fop */
274 ret = inode->i_fop->open(inode, file);
280 * try renew caps after session gets killed.
282 int ceph_renew_caps(struct inode *inode, int fmode)
284 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
285 struct ceph_inode_info *ci = ceph_inode(inode);
286 struct ceph_mds_request *req;
287 int err, flags, wanted;
289 spin_lock(&ci->i_ceph_lock);
290 __ceph_touch_fmode(ci, mdsc, fmode);
291 wanted = __ceph_caps_file_wanted(ci);
292 if (__ceph_is_any_real_caps(ci) &&
293 (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
294 int issued = __ceph_caps_issued(ci, NULL);
295 spin_unlock(&ci->i_ceph_lock);
296 dout("renew caps %p want %s issued %s updating mds_wanted\n",
297 inode, ceph_cap_string(wanted), ceph_cap_string(issued));
298 ceph_check_caps(ci, 0, NULL);
301 spin_unlock(&ci->i_ceph_lock);
304 if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
306 else if (wanted & CEPH_CAP_FILE_RD)
308 else if (wanted & CEPH_CAP_FILE_WR)
311 if (wanted & CEPH_CAP_FILE_LAZYIO)
315 req = prepare_open_request(inode->i_sb, flags, 0);
321 req->r_inode = inode;
325 err = ceph_mdsc_do_request(mdsc, NULL, req);
326 ceph_mdsc_put_request(req);
328 dout("renew caps %p open result=%d\n", inode, err);
329 return err < 0 ? err : 0;
333 * If we already have the requisite capabilities, we can satisfy
334 * the open request locally (no need to request new caps from the
335 * MDS). We do, however, need to inform the MDS (asynchronously)
336 * if our wanted caps set expands.
338 int ceph_open(struct inode *inode, struct file *file)
340 struct ceph_inode_info *ci = ceph_inode(inode);
341 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
342 struct ceph_mds_client *mdsc = fsc->mdsc;
343 struct ceph_mds_request *req;
344 struct ceph_file_info *fi = file->private_data;
346 int flags, fmode, wanted;
349 dout("open file %p is already opened\n", file);
353 /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */
354 flags = file->f_flags & ~(O_CREAT|O_EXCL);
355 if (S_ISDIR(inode->i_mode))
356 flags = O_DIRECTORY; /* mds likes to know */
358 dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode,
359 ceph_vinop(inode), file, flags, file->f_flags);
360 fmode = ceph_flags_to_mode(flags);
361 wanted = ceph_caps_for_mode(fmode);
363 /* snapped files are read-only */
364 if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE))
367 /* trivially open snapdir */
368 if (ceph_snap(inode) == CEPH_SNAPDIR) {
369 return ceph_init_file(inode, file, fmode);
373 * No need to block if we have caps on the auth MDS (for
374 * write) or any MDS (for read). Update wanted set
377 spin_lock(&ci->i_ceph_lock);
378 if (__ceph_is_any_real_caps(ci) &&
379 (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
380 int mds_wanted = __ceph_caps_mds_wanted(ci, true);
381 int issued = __ceph_caps_issued(ci, NULL);
383 dout("open %p fmode %d want %s issued %s using existing\n",
384 inode, fmode, ceph_cap_string(wanted),
385 ceph_cap_string(issued));
386 __ceph_touch_fmode(ci, mdsc, fmode);
387 spin_unlock(&ci->i_ceph_lock);
390 if ((issued & wanted) != wanted &&
391 (mds_wanted & wanted) != wanted &&
392 ceph_snap(inode) != CEPH_SNAPDIR)
393 ceph_check_caps(ci, 0, NULL);
395 return ceph_init_file(inode, file, fmode);
396 } else if (ceph_snap(inode) != CEPH_NOSNAP &&
397 (ci->i_snap_caps & wanted) == wanted) {
398 __ceph_touch_fmode(ci, mdsc, fmode);
399 spin_unlock(&ci->i_ceph_lock);
400 return ceph_init_file(inode, file, fmode);
403 spin_unlock(&ci->i_ceph_lock);
405 dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted));
406 req = prepare_open_request(inode->i_sb, flags, 0);
411 req->r_inode = inode;
415 err = ceph_mdsc_do_request(mdsc, NULL, req);
417 err = ceph_init_file(inode, file, req->r_fmode);
418 ceph_mdsc_put_request(req);
419 dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode));
424 /* Clone the layout from a synchronous create, if the dir now has Dc caps */
426 cache_file_layout(struct inode *dst, struct inode *src)
428 struct ceph_inode_info *cdst = ceph_inode(dst);
429 struct ceph_inode_info *csrc = ceph_inode(src);
431 spin_lock(&cdst->i_ceph_lock);
432 if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) &&
433 !ceph_file_layout_is_valid(&cdst->i_cached_layout)) {
434 memcpy(&cdst->i_cached_layout, &csrc->i_layout,
435 sizeof(cdst->i_cached_layout));
436 rcu_assign_pointer(cdst->i_cached_layout.pool_ns,
437 ceph_try_get_string(csrc->i_layout.pool_ns));
439 spin_unlock(&cdst->i_ceph_lock);
443 * Try to set up an async create. We need caps, a file layout, and inode number,
444 * and either a lease on the dentry or complete dir info. If any of those
445 * criteria are not satisfied, then return false and the caller can go
448 static int try_prep_async_create(struct inode *dir, struct dentry *dentry,
449 struct ceph_file_layout *lo, u64 *pino)
451 struct ceph_inode_info *ci = ceph_inode(dir);
452 struct ceph_dentry_info *di = ceph_dentry(dentry);
453 int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
456 spin_lock(&ci->i_ceph_lock);
457 /* No auth cap means no chance for Dc caps */
461 /* Any delegated inos? */
462 if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos))
465 if (!ceph_file_layout_is_valid(&ci->i_cached_layout))
468 if ((__ceph_caps_issued(ci, NULL) & want) != want)
471 if (d_in_lookup(dentry)) {
472 if (!__ceph_dir_is_complete(ci))
474 spin_lock(&dentry->d_lock);
475 di->lease_shared_gen = atomic_read(&ci->i_shared_gen);
476 spin_unlock(&dentry->d_lock);
477 } else if (atomic_read(&ci->i_shared_gen) !=
478 READ_ONCE(di->lease_shared_gen)) {
482 ino = ceph_get_deleg_ino(ci->i_auth_cap->session);
487 ceph_take_cap_refs(ci, want, false);
488 memcpy(lo, &ci->i_cached_layout, sizeof(*lo));
489 rcu_assign_pointer(lo->pool_ns,
490 ceph_try_get_string(ci->i_cached_layout.pool_ns));
493 spin_unlock(&ci->i_ceph_lock);
497 static void restore_deleg_ino(struct inode *dir, u64 ino)
499 struct ceph_inode_info *ci = ceph_inode(dir);
500 struct ceph_mds_session *s = NULL;
502 spin_lock(&ci->i_ceph_lock);
504 s = ceph_get_mds_session(ci->i_auth_cap->session);
505 spin_unlock(&ci->i_ceph_lock);
507 int err = ceph_restore_deleg_ino(s, ino);
509 pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n",
511 ceph_put_mds_session(s);
515 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
516 struct ceph_mds_request *req)
518 int result = req->r_err ? req->r_err :
519 le32_to_cpu(req->r_reply_info.head->result);
521 if (result == -EJUKEBOX)
524 mapping_set_error(req->r_parent->i_mapping, result);
527 struct dentry *dentry = req->r_dentry;
530 char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
533 ceph_dir_clear_complete(req->r_parent);
534 if (!d_unhashed(dentry))
537 /* FIXME: start returning I/O errors on all accesses? */
538 pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n",
539 base, IS_ERR(path) ? "<<bad>>" : path, result);
540 ceph_mdsc_free_path(path, pathlen);
543 if (req->r_target_inode) {
544 struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
545 u64 ino = ceph_vino(req->r_target_inode).ino;
547 if (req->r_deleg_ino != ino)
548 pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n",
549 __func__, req->r_err, req->r_deleg_ino, ino);
550 mapping_set_error(req->r_target_inode->i_mapping, result);
552 spin_lock(&ci->i_ceph_lock);
553 if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
554 ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
555 wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
557 ceph_kick_flushing_inode_caps(req->r_session, ci);
558 spin_unlock(&ci->i_ceph_lock);
560 pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__,
564 ceph_mdsc_release_dir_caps(req);
567 static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
568 struct file *file, umode_t mode,
569 struct ceph_mds_request *req,
570 struct ceph_acl_sec_ctx *as_ctx,
571 struct ceph_file_layout *lo)
575 struct ceph_mds_reply_inode in = { };
576 struct ceph_mds_reply_info_in iinfo = { .in = &in };
577 struct ceph_inode_info *ci = ceph_inode(dir);
579 struct timespec64 now;
580 struct ceph_string *pool_ns;
581 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb);
582 struct ceph_vino vino = { .ino = req->r_deleg_ino,
583 .snap = CEPH_NOSNAP };
585 ktime_get_real_ts64(&now);
587 inode = ceph_get_inode(dentry->d_sb, vino);
589 return PTR_ERR(inode);
591 iinfo.inline_version = CEPH_INLINE_NONE;
592 iinfo.change_attr = 1;
593 ceph_encode_timespec64(&iinfo.btime, &now);
595 if (req->r_pagelist) {
596 iinfo.xattr_len = req->r_pagelist->length;
597 iinfo.xattr_data = req->r_pagelist->mapped_tail;
600 iinfo.xattr_len = ARRAY_SIZE(xattr_buf);
601 iinfo.xattr_data = xattr_buf;
602 memset(iinfo.xattr_data, 0, iinfo.xattr_len);
605 in.ino = cpu_to_le64(vino.ino);
606 in.snapid = cpu_to_le64(CEPH_NOSNAP);
607 in.version = cpu_to_le64(1); // ???
608 in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
609 in.cap.cap_id = cpu_to_le64(1);
610 in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
611 in.cap.flags = CEPH_CAP_FLAG_AUTH;
612 in.ctime = in.mtime = in.atime = iinfo.btime;
613 in.truncate_seq = cpu_to_le32(1);
614 in.truncate_size = cpu_to_le64(-1ULL);
615 in.xattr_version = cpu_to_le64(1);
616 in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid()));
617 if (dir->i_mode & S_ISGID) {
618 in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid));
620 /* Directories always inherit the setgid bit. */
623 else if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP) &&
624 !in_group_p(dir->i_gid) &&
625 !capable_wrt_inode_uidgid(dir, CAP_FSETID))
628 in.gid = cpu_to_le32(from_kgid(&init_user_ns, current_fsgid()));
630 in.mode = cpu_to_le32((u32)mode);
632 in.nlink = cpu_to_le32(1);
633 in.max_size = cpu_to_le64(lo->stripe_unit);
635 ceph_file_layout_to_legacy(lo, &in.layout);
636 /* lo is private, so pool_ns can't change */
637 pool_ns = rcu_dereference_raw(lo->pool_ns);
639 iinfo.pool_ns_len = pool_ns->len;
640 iinfo.pool_ns_data = pool_ns->str;
643 down_read(&mdsc->snap_rwsem);
644 ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
646 up_read(&mdsc->snap_rwsem);
648 dout("%s failed to fill inode: %d\n", __func__, ret);
649 ceph_dir_clear_complete(dir);
650 if (!d_unhashed(dentry))
652 if (inode->i_state & I_NEW)
653 discard_new_inode(inode);
657 dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__,
658 vino.ino, ceph_ino(dir), dentry->d_name.name);
659 ceph_dir_clear_ordered(dir);
660 ceph_init_inode_acls(inode, as_ctx);
661 if (inode->i_state & I_NEW) {
663 * If it's not I_NEW, then someone created this before
664 * we got here. Assume the server is aware of it at
665 * that point and don't worry about setting
666 * CEPH_I_ASYNC_CREATE.
668 ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE;
669 unlock_new_inode(inode);
671 if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
672 if (!d_unhashed(dentry))
674 dn = d_splice_alias(inode, dentry);
675 WARN_ON_ONCE(dn && dn != dentry);
677 file->f_mode |= FMODE_CREATED;
678 ret = finish_open(file, dentry, ceph_open);
684 * Do a lookup + open with a single request. If we get a non-existent
685 * file or symlink, return 1 so the VFS can retry.
687 int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
688 struct file *file, unsigned flags, umode_t mode)
690 struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
691 struct ceph_mds_client *mdsc = fsc->mdsc;
692 struct ceph_mds_request *req;
694 struct ceph_acl_sec_ctx as_ctx = {};
695 bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS);
699 dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n",
701 d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode);
703 if (dentry->d_name.len > NAME_MAX)
704 return -ENAMETOOLONG;
707 * Do not truncate the file, since atomic_open is called before the
708 * permission check. The caller will do the truncation afterward.
712 if (flags & O_CREAT) {
713 if (ceph_quota_is_max_files_exceeded(dir))
715 err = ceph_pre_init_acls(dir, &mode, &as_ctx);
718 err = ceph_security_init_secctx(dentry, mode, &as_ctx);
721 /* Async create can't handle more than a page of xattrs */
722 if (as_ctx.pagelist &&
723 !list_is_singular(&as_ctx.pagelist->head))
725 } else if (!d_in_lookup(dentry)) {
726 /* If it's not being looked up, it's negative */
731 req = prepare_open_request(dir->i_sb, flags, mode);
736 req->r_dentry = dget(dentry);
738 mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
739 if (ceph_security_xattr_wanted(dir))
740 mask |= CEPH_CAP_XATTR_SHARED;
741 req->r_args.open.mask = cpu_to_le32(mask);
744 if (flags & O_CREAT) {
745 struct ceph_file_layout lo;
747 req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;
748 req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
749 if (as_ctx.pagelist) {
750 req->r_pagelist = as_ctx.pagelist;
751 as_ctx.pagelist = NULL;
755 try_prep_async_create(dir, dentry, &lo,
756 &req->r_deleg_ino))) {
757 set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
758 req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL);
759 req->r_callback = ceph_async_create_cb;
760 err = ceph_mdsc_submit_request(mdsc, dir, req);
762 err = ceph_finish_async_create(dir, dentry,
765 } else if (err == -EJUKEBOX) {
766 restore_deleg_ino(dir, req->r_deleg_ino);
767 ceph_mdsc_put_request(req);
769 ceph_put_string(rcu_dereference_raw(lo.pool_ns));
772 ceph_put_string(rcu_dereference_raw(lo.pool_ns));
777 set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
778 err = ceph_mdsc_do_request(mdsc, (flags & O_CREAT) ? dir : NULL, req);
779 err = ceph_handle_snapdir(req, dentry, err);
783 if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
784 err = ceph_handle_notrace_create(dir, dentry);
786 if (d_in_lookup(dentry)) {
787 dn = ceph_finish_lookup(req, dentry, err);
791 /* we were given a hashed negative dentry */
796 if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
797 /* make vfs retry on splice, ENOENT, or symlink */
798 dout("atomic_open finish_no_open on dn %p\n", dn);
799 err = finish_no_open(file, dn);
801 dout("atomic_open finish_open on dn %p\n", dn);
802 if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) {
803 struct inode *newino = d_inode(dentry);
805 cache_file_layout(dir, newino);
806 ceph_init_inode_acls(newino, &as_ctx);
807 file->f_mode |= FMODE_CREATED;
809 err = finish_open(file, dentry, ceph_open);
812 ceph_mdsc_put_request(req);
814 ceph_release_acl_sec_ctx(&as_ctx);
815 dout("atomic_open result=%d\n", err);
819 int ceph_release(struct inode *inode, struct file *file)
821 struct ceph_inode_info *ci = ceph_inode(inode);
823 if (S_ISDIR(inode->i_mode)) {
824 struct ceph_dir_file_info *dfi = file->private_data;
825 dout("release inode %p dir file %p\n", inode, file);
826 WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
828 ceph_put_fmode(ci, dfi->file_info.fmode, 1);
830 if (dfi->last_readdir)
831 ceph_mdsc_put_request(dfi->last_readdir);
832 kfree(dfi->last_name);
833 kfree(dfi->dir_info);
834 kmem_cache_free(ceph_dir_file_cachep, dfi);
836 struct ceph_file_info *fi = file->private_data;
837 dout("release inode %p regular file %p\n", inode, file);
838 WARN_ON(!list_empty(&fi->rw_contexts));
840 ceph_put_fmode(ci, fi->fmode, 1);
842 kmem_cache_free(ceph_file_cachep, fi);
845 /* wake up anyone waiting for caps on this inode */
846 wake_up_all(&ci->i_cap_wq);
857 * Completely synchronous read and write methods. Direct from __user
858 * buffer to osd, or directly to user pages (if O_DIRECT).
860 * If the read spans object boundary, just do multiple reads. (That's not
861 * atomic, but good enough for now.)
863 * If we get a short result from the OSD, check against i_size; we need to
864 * only return a short read to the caller if we hit EOF.
866 static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
869 struct file *file = iocb->ki_filp;
870 struct inode *inode = file_inode(file);
871 struct ceph_inode_info *ci = ceph_inode(inode);
872 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
873 struct ceph_osd_client *osdc = &fsc->client->osdc;
875 u64 off = iocb->ki_pos;
876 u64 len = iov_iter_count(to);
878 dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len,
879 (file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
884 * flush any page cache pages in this range. this
885 * will make concurrent normal and sync io slow,
886 * but it will at least behave sensibly when they are
889 ret = filemap_write_and_wait_range(inode->i_mapping,
895 while ((len = iov_iter_count(to)) > 0) {
896 struct ceph_osd_request *req;
905 req = ceph_osdc_new_request(osdc, &ci->i_layout,
906 ci->i_vino, off, &len, 0, 1,
907 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
908 NULL, ci->i_truncate_seq,
909 ci->i_truncate_size, false);
915 more = len < iov_iter_count(to);
917 num_pages = calc_pages_for(off, len);
918 page_off = off & ~PAGE_MASK;
919 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
921 ceph_osdc_put_request(req);
922 ret = PTR_ERR(pages);
926 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off,
928 ret = ceph_osdc_start_request(osdc, req, false);
930 ret = ceph_osdc_wait_request(osdc, req);
932 ceph_update_read_latency(&fsc->mdsc->metric,
933 req->r_start_latency,
937 ceph_osdc_put_request(req);
939 i_size = i_size_read(inode);
940 dout("sync_read %llu~%llu got %zd i_size %llu%s\n",
941 off, len, ret, i_size, (more ? " MORE" : ""));
945 if (ret >= 0 && ret < len && (off + ret < i_size)) {
946 int zlen = min(len - ret, i_size - off - ret);
947 int zoff = page_off + ret;
948 dout("sync_read zero gap %llu~%llu\n",
949 off + ret, off + ret + zlen);
950 ceph_zero_page_vector_range(zoff, zlen, pages);
955 left = ret > 0 ? ret : 0;
958 page_off = off & ~PAGE_MASK;
959 len = min_t(size_t, left, PAGE_SIZE - page_off);
960 SetPageUptodate(pages[idx]);
961 copied = copy_page_to_iter(pages[idx++],
970 ceph_release_page_vector(pages, num_pages);
973 if (ret == -EBLOCKLISTED)
974 fsc->blocklisted = true;
978 if (off >= i_size || !more)
982 if (off > iocb->ki_pos) {
984 iov_iter_count(to) > 0 && off >= i_size_read(inode))
985 *retry_op = CHECK_EOF;
986 ret = off - iocb->ki_pos;
990 dout("sync_read result %zd retry_op %d\n", ret, *retry_op);
994 struct ceph_aio_request {
1000 struct list_head osd_reqs;
1002 atomic_t pending_reqs;
1003 struct timespec64 mtime;
1004 struct ceph_cap_flush *prealloc_cf;
1007 struct ceph_aio_work {
1008 struct work_struct work;
1009 struct ceph_osd_request *req;
1012 static void ceph_aio_retry_work(struct work_struct *work);
1014 static void ceph_aio_complete(struct inode *inode,
1015 struct ceph_aio_request *aio_req)
1017 struct ceph_inode_info *ci = ceph_inode(inode);
1020 if (!atomic_dec_and_test(&aio_req->pending_reqs))
1023 if (aio_req->iocb->ki_flags & IOCB_DIRECT)
1024 inode_dio_end(inode);
1026 ret = aio_req->error;
1028 ret = aio_req->total_len;
1030 dout("ceph_aio_complete %p rc %d\n", inode, ret);
1032 if (ret >= 0 && aio_req->write) {
1035 loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
1036 if (endoff > i_size_read(inode)) {
1037 if (ceph_inode_set_size(inode, endoff))
1038 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
1041 spin_lock(&ci->i_ceph_lock);
1042 ci->i_inline_version = CEPH_INLINE_NONE;
1043 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1044 &aio_req->prealloc_cf);
1045 spin_unlock(&ci->i_ceph_lock);
1047 __mark_inode_dirty(inode, dirty);
1051 ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
1054 aio_req->iocb->ki_complete(aio_req->iocb, ret, 0);
1056 ceph_free_cap_flush(aio_req->prealloc_cf);
1060 static void ceph_aio_complete_req(struct ceph_osd_request *req)
1062 int rc = req->r_result;
1063 struct inode *inode = req->r_inode;
1064 struct ceph_aio_request *aio_req = req->r_priv;
1065 struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
1066 struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric;
1068 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS);
1069 BUG_ON(!osd_data->num_bvecs);
1071 dout("ceph_aio_complete_req %p rc %d bytes %u\n",
1072 inode, rc, osd_data->bvec_pos.iter.bi_size);
1074 /* r_start_latency == 0 means the request was not submitted */
1075 if (req->r_start_latency) {
1077 ceph_update_write_latency(metric, req->r_start_latency,
1078 req->r_end_latency, rc);
1080 ceph_update_read_latency(metric, req->r_start_latency,
1081 req->r_end_latency, rc);
1084 if (rc == -EOLDSNAPC) {
1085 struct ceph_aio_work *aio_work;
1086 BUG_ON(!aio_req->write);
1088 aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS);
1090 INIT_WORK(&aio_work->work, ceph_aio_retry_work);
1091 aio_work->req = req;
1092 queue_work(ceph_inode_to_client(inode)->inode_wq,
1097 } else if (!aio_req->write) {
1100 if (rc >= 0 && osd_data->bvec_pos.iter.bi_size > rc) {
1102 int zlen = osd_data->bvec_pos.iter.bi_size - rc;
1105 * If read is satisfied by single OSD request,
1106 * it can pass EOF. Otherwise read is within
1109 if (aio_req->num_reqs == 1) {
1110 loff_t i_size = i_size_read(inode);
1111 loff_t endoff = aio_req->iocb->ki_pos + rc;
1112 if (endoff < i_size)
1113 zlen = min_t(size_t, zlen,
1115 aio_req->total_len = rc + zlen;
1118 iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs,
1119 osd_data->num_bvecs,
1120 osd_data->bvec_pos.iter.bi_size);
1121 iov_iter_advance(&i, rc);
1122 iov_iter_zero(zlen, &i);
1126 put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs,
1127 aio_req->should_dirty);
1128 ceph_osdc_put_request(req);
1131 cmpxchg(&aio_req->error, 0, rc);
1133 ceph_aio_complete(inode, aio_req);
1137 static void ceph_aio_retry_work(struct work_struct *work)
1139 struct ceph_aio_work *aio_work =
1140 container_of(work, struct ceph_aio_work, work);
1141 struct ceph_osd_request *orig_req = aio_work->req;
1142 struct ceph_aio_request *aio_req = orig_req->r_priv;
1143 struct inode *inode = orig_req->r_inode;
1144 struct ceph_inode_info *ci = ceph_inode(inode);
1145 struct ceph_snap_context *snapc;
1146 struct ceph_osd_request *req;
1149 spin_lock(&ci->i_ceph_lock);
1150 if (__ceph_have_pending_cap_snap(ci)) {
1151 struct ceph_cap_snap *capsnap =
1152 list_last_entry(&ci->i_cap_snaps,
1153 struct ceph_cap_snap,
1155 snapc = ceph_get_snap_context(capsnap->context);
1157 BUG_ON(!ci->i_head_snapc);
1158 snapc = ceph_get_snap_context(ci->i_head_snapc);
1160 spin_unlock(&ci->i_ceph_lock);
1162 req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1,
1170 req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1171 ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc);
1172 ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid);
1174 req->r_ops[0] = orig_req->r_ops[0];
1176 req->r_mtime = aio_req->mtime;
1177 req->r_data_offset = req->r_ops[0].extent.offset;
1179 ret = ceph_osdc_alloc_messages(req, GFP_NOFS);
1181 ceph_osdc_put_request(req);
1186 ceph_osdc_put_request(orig_req);
1188 req->r_callback = ceph_aio_complete_req;
1189 req->r_inode = inode;
1190 req->r_priv = aio_req;
1192 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1195 req->r_result = ret;
1196 ceph_aio_complete_req(req);
1199 ceph_put_snap_context(snapc);
1204 ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
1205 struct ceph_snap_context *snapc,
1206 struct ceph_cap_flush **pcf)
1208 struct file *file = iocb->ki_filp;
1209 struct inode *inode = file_inode(file);
1210 struct ceph_inode_info *ci = ceph_inode(inode);
1211 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1212 struct ceph_client_metric *metric = &fsc->mdsc->metric;
1213 struct ceph_vino vino;
1214 struct ceph_osd_request *req;
1215 struct bio_vec *bvecs;
1216 struct ceph_aio_request *aio_req = NULL;
1220 struct timespec64 mtime = current_time(inode);
1221 size_t count = iov_iter_count(iter);
1222 loff_t pos = iocb->ki_pos;
1223 bool write = iov_iter_rw(iter) == WRITE;
1224 bool should_dirty = !write && iter_is_iovec(iter);
1226 if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1229 dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
1230 (write ? "write" : "read"), file, pos, (unsigned)count,
1231 snapc, snapc ? snapc->seq : 0);
1234 int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
1236 (pos + count - 1) >> PAGE_SHIFT);
1238 dout("invalidate_inode_pages2_range returned %d\n", ret2);
1240 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1242 flags = CEPH_OSD_FLAG_READ;
1245 while (iov_iter_count(iter) > 0) {
1246 u64 size = iov_iter_count(iter);
1250 size = min_t(u64, size, fsc->mount_options->wsize);
1252 size = min_t(u64, size, fsc->mount_options->rsize);
1254 vino = ceph_vino(inode);
1255 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1256 vino, pos, &size, 0,
1258 write ? CEPH_OSD_OP_WRITE :
1262 ci->i_truncate_size,
1269 len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages);
1271 ceph_osdc_put_request(req);
1276 osd_req_op_extent_update(req, 0, len);
1279 * To simplify error handling, allow AIO when IO within i_size
1280 * or IO can be satisfied by single OSD request.
1282 if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) &&
1283 (len == count || pos + count <= i_size_read(inode))) {
1284 aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL);
1286 aio_req->iocb = iocb;
1287 aio_req->write = write;
1288 aio_req->should_dirty = should_dirty;
1289 INIT_LIST_HEAD(&aio_req->osd_reqs);
1291 aio_req->mtime = mtime;
1292 swap(aio_req->prealloc_cf, *pcf);
1300 * throw out any page cache pages in this range. this
1303 truncate_inode_pages_range(inode->i_mapping, pos,
1304 PAGE_ALIGN(pos + len) - 1);
1306 req->r_mtime = mtime;
1309 osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
1312 aio_req->total_len += len;
1313 aio_req->num_reqs++;
1314 atomic_inc(&aio_req->pending_reqs);
1316 req->r_callback = ceph_aio_complete_req;
1317 req->r_inode = inode;
1318 req->r_priv = aio_req;
1319 list_add_tail(&req->r_private_item, &aio_req->osd_reqs);
1325 ret = ceph_osdc_start_request(req->r_osdc, req, false);
1327 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1330 ceph_update_write_latency(metric, req->r_start_latency,
1331 req->r_end_latency, ret);
1333 ceph_update_read_latency(metric, req->r_start_latency,
1334 req->r_end_latency, ret);
1336 size = i_size_read(inode);
1340 if (ret >= 0 && ret < len && pos + ret < size) {
1342 int zlen = min_t(size_t, len - ret,
1345 iov_iter_bvec(&i, READ, bvecs, num_pages, len);
1346 iov_iter_advance(&i, ret);
1347 iov_iter_zero(zlen, &i);
1354 put_bvecs(bvecs, num_pages, should_dirty);
1355 ceph_osdc_put_request(req);
1360 if (!write && pos >= size)
1363 if (write && pos > size) {
1364 if (ceph_inode_set_size(inode, pos))
1365 ceph_check_caps(ceph_inode(inode),
1366 CHECK_CAPS_AUTHONLY,
1372 LIST_HEAD(osd_reqs);
1374 if (aio_req->num_reqs == 0) {
1379 ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR :
1382 list_splice(&aio_req->osd_reqs, &osd_reqs);
1383 inode_dio_begin(inode);
1384 while (!list_empty(&osd_reqs)) {
1385 req = list_first_entry(&osd_reqs,
1386 struct ceph_osd_request,
1388 list_del_init(&req->r_private_item);
1390 ret = ceph_osdc_start_request(req->r_osdc,
1393 req->r_result = ret;
1394 ceph_aio_complete_req(req);
1397 return -EIOCBQUEUED;
1400 if (ret != -EOLDSNAPC && pos > iocb->ki_pos) {
1401 ret = pos - iocb->ki_pos;
1408 * Synchronous write, straight from __user pointer or user pages.
1410 * If write spans object boundary, just do multiple writes. (For a
1411 * correct atomic write, we should e.g. take write locks on all
1412 * objects, rollback on failure, etc.)
1415 ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
1416 struct ceph_snap_context *snapc)
1418 struct file *file = iocb->ki_filp;
1419 struct inode *inode = file_inode(file);
1420 struct ceph_inode_info *ci = ceph_inode(inode);
1421 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1422 struct ceph_vino vino;
1423 struct ceph_osd_request *req;
1424 struct page **pages;
1430 bool check_caps = false;
1431 struct timespec64 mtime = current_time(inode);
1432 size_t count = iov_iter_count(from);
1434 if (ceph_snap(file_inode(file)) != CEPH_NOSNAP)
1437 dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
1438 file, pos, (unsigned)count, snapc, snapc->seq);
1440 ret = filemap_write_and_wait_range(inode->i_mapping,
1441 pos, pos + count - 1);
1445 ret = invalidate_inode_pages2_range(inode->i_mapping,
1447 (pos + count - 1) >> PAGE_SHIFT);
1449 dout("invalidate_inode_pages2_range returned %d\n", ret);
1451 flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE;
1453 while ((len = iov_iter_count(from)) > 0) {
1457 vino = ceph_vino(inode);
1458 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
1459 vino, pos, &len, 0, 1,
1460 CEPH_OSD_OP_WRITE, flags, snapc,
1462 ci->i_truncate_size,
1470 * write from beginning of first page,
1471 * regardless of io alignment
1473 num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
1475 pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1476 if (IS_ERR(pages)) {
1477 ret = PTR_ERR(pages);
1482 for (n = 0; n < num_pages; n++) {
1483 size_t plen = min_t(size_t, left, PAGE_SIZE);
1484 ret = copy_page_from_iter(pages[n], 0, plen, from);
1493 ceph_release_page_vector(pages, num_pages);
1497 req->r_inode = inode;
1499 osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0,
1502 req->r_mtime = mtime;
1503 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
1505 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
1507 ceph_update_write_latency(&fsc->mdsc->metric, req->r_start_latency,
1508 req->r_end_latency, ret);
1510 ceph_osdc_put_request(req);
1512 ceph_set_error_write(ci);
1516 ceph_clear_error_write(ci);
1519 if (pos > i_size_read(inode)) {
1520 check_caps = ceph_inode_set_size(inode, pos);
1522 ceph_check_caps(ceph_inode(inode),
1523 CHECK_CAPS_AUTHONLY,
1529 if (ret != -EOLDSNAPC && written > 0) {
1537 * Wrap generic_file_aio_read with checks for cap bits on the inode.
1538 * Atomically grab references, so that those bits are not released
1539 * back to the MDS mid-read.
1541 * Hmm, the sync read case isn't actually async... should it be?
1543 static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to)
1545 struct file *filp = iocb->ki_filp;
1546 struct ceph_file_info *fi = filp->private_data;
1547 size_t len = iov_iter_count(to);
1548 struct inode *inode = file_inode(filp);
1549 struct ceph_inode_info *ci = ceph_inode(inode);
1550 struct page *pinned_page = NULL;
1551 bool direct_lock = iocb->ki_flags & IOCB_DIRECT;
1554 int retry_op = 0, read = 0;
1557 dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
1558 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode);
1561 ceph_start_io_direct(inode);
1563 ceph_start_io_read(inode);
1565 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1566 want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1568 want = CEPH_CAP_FILE_CACHE;
1569 ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1,
1570 &got, &pinned_page);
1572 if (iocb->ki_flags & IOCB_DIRECT)
1573 ceph_end_io_direct(inode);
1575 ceph_end_io_read(inode);
1579 if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1580 (iocb->ki_flags & IOCB_DIRECT) ||
1581 (fi->flags & CEPH_F_SYNC)) {
1583 dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1584 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1585 ceph_cap_string(got));
1587 if (ci->i_inline_version == CEPH_INLINE_NONE) {
1588 if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) {
1589 ret = ceph_direct_read_write(iocb, to,
1591 if (ret >= 0 && ret < len)
1592 retry_op = CHECK_EOF;
1594 ret = ceph_sync_read(iocb, to, &retry_op);
1597 retry_op = READ_INLINE;
1600 CEPH_DEFINE_RW_CONTEXT(rw_ctx, got);
1601 dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
1602 inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len,
1603 ceph_cap_string(got));
1604 ceph_add_rw_context(fi, &rw_ctx);
1605 ret = generic_file_read_iter(iocb, to);
1606 ceph_del_rw_context(fi, &rw_ctx);
1609 dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n",
1610 inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret);
1612 put_page(pinned_page);
1615 ceph_put_cap_refs(ci, got);
1618 ceph_end_io_direct(inode);
1620 ceph_end_io_read(inode);
1622 if (retry_op > HAVE_RETRIED && ret >= 0) {
1624 struct page *page = NULL;
1626 if (retry_op == READ_INLINE) {
1627 page = __page_cache_alloc(GFP_KERNEL);
1632 statret = __ceph_do_getattr(inode, page,
1633 CEPH_STAT_CAP_INLINE_DATA, !!page);
1637 if (statret == -ENODATA) {
1638 BUG_ON(retry_op != READ_INLINE);
1644 i_size = i_size_read(inode);
1645 if (retry_op == READ_INLINE) {
1646 BUG_ON(ret > 0 || read > 0);
1647 if (iocb->ki_pos < i_size &&
1648 iocb->ki_pos < PAGE_SIZE) {
1649 loff_t end = min_t(loff_t, i_size,
1650 iocb->ki_pos + len);
1651 end = min_t(loff_t, end, PAGE_SIZE);
1653 zero_user_segment(page, statret, end);
1654 ret = copy_page_to_iter(page,
1655 iocb->ki_pos & ~PAGE_MASK,
1656 end - iocb->ki_pos, to);
1657 iocb->ki_pos += ret;
1660 if (iocb->ki_pos < i_size && read < len) {
1661 size_t zlen = min_t(size_t, len - read,
1662 i_size - iocb->ki_pos);
1663 ret = iov_iter_zero(zlen, to);
1664 iocb->ki_pos += ret;
1667 __free_pages(page, 0);
1671 /* hit EOF or hole? */
1672 if (retry_op == CHECK_EOF && iocb->ki_pos < i_size &&
1674 dout("sync_read hit hole, ppos %lld < size %lld"
1675 ", reading more\n", iocb->ki_pos, i_size);
1679 retry_op = HAVE_RETRIED;
1691 * Take cap references to avoid releasing caps to MDS mid-write.
1693 * If we are synchronous, and write with an old snap context, the OSD
1694 * may return EOLDSNAPC. In that case, retry the write.. _after_
1695 * dropping our cap refs and allowing the pending snap to logically
1696 * complete _before_ this write occurs.
1698 * If we are near ENOSPC, write synchronously.
1700 static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
1702 struct file *file = iocb->ki_filp;
1703 struct ceph_file_info *fi = file->private_data;
1704 struct inode *inode = file_inode(file);
1705 struct ceph_inode_info *ci = ceph_inode(inode);
1706 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1707 struct ceph_osd_client *osdc = &fsc->client->osdc;
1708 struct ceph_cap_flush *prealloc_cf;
1709 ssize_t count, written = 0;
1711 bool direct_lock = false;
1715 loff_t limit = max(i_size_read(inode), fsc->max_file_size);
1717 if (ceph_snap(inode) != CEPH_NOSNAP)
1720 prealloc_cf = ceph_alloc_cap_flush();
1724 if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT)
1729 ceph_start_io_direct(inode);
1731 ceph_start_io_write(inode);
1733 /* We can write back this queue in page reclaim */
1734 current->backing_dev_info = inode_to_bdi(inode);
1736 if (iocb->ki_flags & IOCB_APPEND) {
1737 err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1742 err = generic_write_checks(iocb, from);
1747 if (unlikely(pos >= limit)) {
1751 iov_iter_truncate(from, limit - pos);
1754 count = iov_iter_count(from);
1755 if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) {
1760 down_read(&osdc->lock);
1761 map_flags = osdc->osdmap->flags;
1762 pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id);
1763 up_read(&osdc->lock);
1764 if ((map_flags & CEPH_OSDMAP_FULL) ||
1765 (pool_flags & CEPH_POOL_FLAG_FULL)) {
1770 err = file_remove_privs(file);
1774 if (ci->i_inline_version != CEPH_INLINE_NONE) {
1775 err = ceph_uninline_data(file, NULL);
1780 dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n",
1781 inode, ceph_vinop(inode), pos, count, i_size_read(inode));
1782 if (fi->fmode & CEPH_FILE_MODE_LAZY)
1783 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
1785 want = CEPH_CAP_FILE_BUFFER;
1787 err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count,
1792 err = file_update_time(file);
1796 inode_inc_iversion_raw(inode);
1798 dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n",
1799 inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
1801 if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
1802 (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
1803 (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
1804 struct ceph_snap_context *snapc;
1805 struct iov_iter data;
1807 spin_lock(&ci->i_ceph_lock);
1808 if (__ceph_have_pending_cap_snap(ci)) {
1809 struct ceph_cap_snap *capsnap =
1810 list_last_entry(&ci->i_cap_snaps,
1811 struct ceph_cap_snap,
1813 snapc = ceph_get_snap_context(capsnap->context);
1815 BUG_ON(!ci->i_head_snapc);
1816 snapc = ceph_get_snap_context(ci->i_head_snapc);
1818 spin_unlock(&ci->i_ceph_lock);
1820 /* we might need to revert back to that point */
1822 if (iocb->ki_flags & IOCB_DIRECT)
1823 written = ceph_direct_read_write(iocb, &data, snapc,
1826 written = ceph_sync_write(iocb, &data, pos, snapc);
1828 ceph_end_io_direct(inode);
1830 ceph_end_io_write(inode);
1832 iov_iter_advance(from, written);
1833 ceph_put_snap_context(snapc);
1836 * No need to acquire the i_truncate_mutex. Because
1837 * the MDS revokes Fwb caps before sending truncate
1838 * message to us. We can't get Fwb cap while there
1839 * are pending vmtruncate. So write and vmtruncate
1840 * can not run at the same time
1842 written = generic_perform_write(file, from, pos);
1843 if (likely(written >= 0))
1844 iocb->ki_pos = pos + written;
1845 ceph_end_io_write(inode);
1851 spin_lock(&ci->i_ceph_lock);
1852 ci->i_inline_version = CEPH_INLINE_NONE;
1853 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
1855 spin_unlock(&ci->i_ceph_lock);
1857 __mark_inode_dirty(inode, dirty);
1858 if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
1859 ceph_check_caps(ci, 0, NULL);
1862 dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n",
1863 inode, ceph_vinop(inode), pos, (unsigned)count,
1864 ceph_cap_string(got));
1865 ceph_put_cap_refs(ci, got);
1867 if (written == -EOLDSNAPC) {
1868 dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",
1869 inode, ceph_vinop(inode), pos, (unsigned)count);
1874 if ((map_flags & CEPH_OSDMAP_NEARFULL) ||
1875 (pool_flags & CEPH_POOL_FLAG_NEARFULL))
1876 iocb->ki_flags |= IOCB_DSYNC;
1877 written = generic_write_sync(iocb, written);
1882 ceph_put_cap_refs(ci, got);
1885 ceph_end_io_direct(inode);
1887 ceph_end_io_write(inode);
1889 ceph_free_cap_flush(prealloc_cf);
1890 current->backing_dev_info = NULL;
1891 return written ? written : err;
1895 * llseek. be sure to verify file size on SEEK_END.
1897 static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
1899 struct inode *inode = file->f_mapping->host;
1900 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1906 if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
1907 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
1912 i_size = i_size_read(inode);
1919 * Here we special-case the lseek(fd, 0, SEEK_CUR)
1920 * position-querying operation. Avoid rewriting the "same"
1921 * f_pos value back to the file because a concurrent read(),
1922 * write() or lseek() might have altered it
1928 offset += file->f_pos;
1931 if (offset < 0 || offset >= i_size) {
1937 if (offset < 0 || offset >= i_size) {
1945 ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size));
1948 inode_unlock(inode);
1952 static inline void ceph_zero_partial_page(
1953 struct inode *inode, loff_t offset, unsigned size)
1956 pgoff_t index = offset >> PAGE_SHIFT;
1958 page = find_lock_page(inode->i_mapping, index);
1960 wait_on_page_writeback(page);
1961 zero_user(page, offset & (PAGE_SIZE - 1), size);
1967 static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset,
1970 loff_t nearly = round_up(offset, PAGE_SIZE);
1971 if (offset < nearly) {
1972 loff_t size = nearly - offset;
1975 ceph_zero_partial_page(inode, offset, size);
1979 if (length >= PAGE_SIZE) {
1980 loff_t size = round_down(length, PAGE_SIZE);
1981 truncate_pagecache_range(inode, offset, offset + size - 1);
1986 ceph_zero_partial_page(inode, offset, length);
1989 static int ceph_zero_partial_object(struct inode *inode,
1990 loff_t offset, loff_t *length)
1992 struct ceph_inode_info *ci = ceph_inode(inode);
1993 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
1994 struct ceph_osd_request *req;
2000 op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE;
2003 op = CEPH_OSD_OP_ZERO;
2006 req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
2010 CEPH_OSD_FLAG_WRITE,
2017 req->r_mtime = inode->i_mtime;
2018 ret = ceph_osdc_start_request(&fsc->client->osdc, req, false);
2020 ret = ceph_osdc_wait_request(&fsc->client->osdc, req);
2024 ceph_osdc_put_request(req);
2030 static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
2033 struct ceph_inode_info *ci = ceph_inode(inode);
2034 s32 stripe_unit = ci->i_layout.stripe_unit;
2035 s32 stripe_count = ci->i_layout.stripe_count;
2036 s32 object_size = ci->i_layout.object_size;
2037 u64 object_set_size = object_size * stripe_count;
2040 /* round offset up to next period boundary */
2041 nearly = offset + object_set_size - 1;
2043 nearly -= do_div(t, object_set_size);
2045 while (length && offset < nearly) {
2046 loff_t size = length;
2047 ret = ceph_zero_partial_object(inode, offset, &size);
2053 while (length >= object_set_size) {
2055 loff_t pos = offset;
2056 for (i = 0; i < stripe_count; ++i) {
2057 ret = ceph_zero_partial_object(inode, pos, NULL);
2062 offset += object_set_size;
2063 length -= object_set_size;
2066 loff_t size = length;
2067 ret = ceph_zero_partial_object(inode, offset, &size);
2076 static long ceph_fallocate(struct file *file, int mode,
2077 loff_t offset, loff_t length)
2079 struct ceph_file_info *fi = file->private_data;
2080 struct inode *inode = file_inode(file);
2081 struct ceph_inode_info *ci = ceph_inode(inode);
2082 struct ceph_cap_flush *prealloc_cf;
2089 if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2092 if (!S_ISREG(inode->i_mode))
2095 prealloc_cf = ceph_alloc_cap_flush();
2101 if (ceph_snap(inode) != CEPH_NOSNAP) {
2106 if (ci->i_inline_version != CEPH_INLINE_NONE) {
2107 ret = ceph_uninline_data(file, NULL);
2112 size = i_size_read(inode);
2114 /* Are we punching a hole beyond EOF? */
2117 if ((offset + length) > size)
2118 length = size - offset;
2120 if (fi->fmode & CEPH_FILE_MODE_LAZY)
2121 want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
2123 want = CEPH_CAP_FILE_BUFFER;
2125 ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got, NULL);
2129 ceph_zero_pagecache_range(inode, offset, length);
2130 ret = ceph_zero_objects(inode, offset, length);
2133 spin_lock(&ci->i_ceph_lock);
2134 ci->i_inline_version = CEPH_INLINE_NONE;
2135 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
2137 spin_unlock(&ci->i_ceph_lock);
2139 __mark_inode_dirty(inode, dirty);
2142 ceph_put_cap_refs(ci, got);
2144 inode_unlock(inode);
2145 ceph_free_cap_flush(prealloc_cf);
2150 * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for
2151 * src_ci. Two attempts are made to obtain both caps, and an error is return if
2152 * this fails; zero is returned on success.
2154 static int get_rd_wr_caps(struct file *src_filp, int *src_got,
2155 struct file *dst_filp,
2156 loff_t dst_endoff, int *dst_got)
2159 bool retrying = false;
2162 ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
2163 dst_endoff, dst_got, NULL);
2168 * Since we're already holding the FILE_WR capability for the dst file,
2169 * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some
2170 * retry dance instead to try to get both capabilities.
2172 ret = ceph_try_get_caps(file_inode(src_filp),
2173 CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED,
2176 /* Start by dropping dst_ci caps and getting src_ci caps */
2177 ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got);
2180 /* ceph_try_get_caps masks EAGAIN */
2184 ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD,
2185 CEPH_CAP_FILE_SHARED, -1, src_got, NULL);
2188 /*... drop src_ci caps too, and retry */
2189 ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got);
2196 static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got,
2197 struct ceph_inode_info *dst_ci, int dst_got)
2199 ceph_put_cap_refs(src_ci, src_got);
2200 ceph_put_cap_refs(dst_ci, dst_got);
2204 * This function does several size-related checks, returning an error if:
2205 * - source file is smaller than off+len
2206 * - destination file size is not OK (inode_newsize_ok())
2207 * - max bytes quotas is exceeded
2209 static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
2210 loff_t src_off, loff_t dst_off, size_t len)
2212 loff_t size, endoff;
2214 size = i_size_read(src_inode);
2216 * Don't copy beyond source file EOF. Instead of simply setting length
2217 * to (size - src_off), just drop to VFS default implementation, as the
2218 * local i_size may be stale due to other clients writing to the source
2221 if (src_off + len > size) {
2222 dout("Copy beyond EOF (%llu + %zu > %llu)\n",
2223 src_off, len, size);
2226 size = i_size_read(dst_inode);
2228 endoff = dst_off + len;
2229 if (inode_newsize_ok(dst_inode, endoff))
2232 if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff))
2238 static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off,
2239 struct ceph_inode_info *dst_ci, u64 *dst_off,
2240 struct ceph_fs_client *fsc,
2241 size_t len, unsigned int flags)
2243 struct ceph_object_locator src_oloc, dst_oloc;
2244 struct ceph_object_id src_oid, dst_oid;
2246 u64 src_objnum, src_objoff, dst_objnum, dst_objoff;
2247 u32 src_objlen, dst_objlen;
2248 u32 object_size = src_ci->i_layout.object_size;
2251 src_oloc.pool = src_ci->i_layout.pool_id;
2252 src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns);
2253 dst_oloc.pool = dst_ci->i_layout.pool_id;
2254 dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns);
2256 while (len >= object_size) {
2257 ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off,
2258 object_size, &src_objnum,
2259 &src_objoff, &src_objlen);
2260 ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off,
2261 object_size, &dst_objnum,
2262 &dst_objoff, &dst_objlen);
2263 ceph_oid_init(&src_oid);
2264 ceph_oid_printf(&src_oid, "%llx.%08llx",
2265 src_ci->i_vino.ino, src_objnum);
2266 ceph_oid_init(&dst_oid);
2267 ceph_oid_printf(&dst_oid, "%llx.%08llx",
2268 dst_ci->i_vino.ino, dst_objnum);
2269 /* Do an object remote copy */
2270 ret = ceph_osdc_copy_from(&fsc->client->osdc,
2271 src_ci->i_vino.snap, 0,
2272 &src_oid, &src_oloc,
2273 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2274 CEPH_OSD_OP_FLAG_FADVISE_NOCACHE,
2275 &dst_oid, &dst_oloc,
2276 CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
2277 CEPH_OSD_OP_FLAG_FADVISE_DONTNEED,
2278 dst_ci->i_truncate_seq,
2279 dst_ci->i_truncate_size,
2280 CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ);
2282 if (ret == -EOPNOTSUPP) {
2283 fsc->have_copy_from2 = false;
2284 pr_notice("OSDs don't support copy-from2; disabling copy offload\n");
2286 dout("ceph_osdc_copy_from returned %d\n", ret);
2292 bytes += object_size;
2293 *src_off += object_size;
2294 *dst_off += object_size;
2298 ceph_oloc_destroy(&src_oloc);
2299 ceph_oloc_destroy(&dst_oloc);
2303 static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
2304 struct file *dst_file, loff_t dst_off,
2305 size_t len, unsigned int flags)
2307 struct inode *src_inode = file_inode(src_file);
2308 struct inode *dst_inode = file_inode(dst_file);
2309 struct ceph_inode_info *src_ci = ceph_inode(src_inode);
2310 struct ceph_inode_info *dst_ci = ceph_inode(dst_inode);
2311 struct ceph_cap_flush *prealloc_cf;
2312 struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode);
2314 ssize_t ret = -EIO, bytes;
2315 u64 src_objnum, dst_objnum, src_objoff, dst_objoff;
2316 u32 src_objlen, dst_objlen;
2317 int src_got = 0, dst_got = 0, err, dirty;
2319 if (src_inode->i_sb != dst_inode->i_sb) {
2320 struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode);
2322 if (ceph_fsid_compare(&src_fsc->client->fsid,
2323 &dst_fsc->client->fsid)) {
2324 dout("Copying files across clusters: src: %pU dst: %pU\n",
2325 &src_fsc->client->fsid, &dst_fsc->client->fsid);
2329 if (ceph_snap(dst_inode) != CEPH_NOSNAP)
2333 * Some of the checks below will return -EOPNOTSUPP, which will force a
2334 * fallback to the default VFS copy_file_range implementation. This is
2335 * desirable in several cases (for ex, the 'len' is smaller than the
2336 * size of the objects, or in cases where that would be more
2340 if (ceph_test_mount_opt(src_fsc, NOCOPYFROM))
2343 if (!src_fsc->have_copy_from2)
2347 * Striped file layouts require that we copy partial objects, but the
2348 * OSD copy-from operation only supports full-object copies. Limit
2349 * this to non-striped file layouts for now.
2351 if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) ||
2352 (src_ci->i_layout.stripe_count != 1) ||
2353 (dst_ci->i_layout.stripe_count != 1) ||
2354 (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) {
2355 dout("Invalid src/dst files layout\n");
2359 if (len < src_ci->i_layout.object_size)
2360 return -EOPNOTSUPP; /* no remote copy will be done */
2362 prealloc_cf = ceph_alloc_cap_flush();
2366 /* Start by sync'ing the source and destination files */
2367 ret = file_write_and_wait_range(src_file, src_off, (src_off + len));
2369 dout("failed to write src file (%zd)\n", ret);
2372 ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len));
2374 dout("failed to write dst file (%zd)\n", ret);
2379 * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other
2380 * clients may have dirty data in their caches. And OSDs know nothing
2381 * about caps, so they can't safely do the remote object copies.
2383 err = get_rd_wr_caps(src_file, &src_got,
2384 dst_file, (dst_off + len), &dst_got);
2386 dout("get_rd_wr_caps returned %d\n", err);
2391 ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len);
2395 /* Drop dst file cached pages */
2396 ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
2397 dst_off >> PAGE_SHIFT,
2398 (dst_off + len) >> PAGE_SHIFT);
2400 dout("Failed to invalidate inode pages (%zd)\n", ret);
2403 ceph_calc_file_object_mapping(&src_ci->i_layout, src_off,
2404 src_ci->i_layout.object_size,
2405 &src_objnum, &src_objoff, &src_objlen);
2406 ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off,
2407 dst_ci->i_layout.object_size,
2408 &dst_objnum, &dst_objoff, &dst_objlen);
2409 /* object-level offsets need to the same */
2410 if (src_objoff != dst_objoff) {
2416 * Do a manual copy if the object offset isn't object aligned.
2417 * 'src_objlen' contains the bytes left until the end of the object,
2418 * starting at the src_off
2421 dout("Initial partial copy of %u bytes\n", src_objlen);
2424 * we need to temporarily drop all caps as we'll be calling
2425 * {read,write}_iter, which will get caps again.
2427 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2428 ret = do_splice_direct(src_file, &src_off, dst_file,
2429 &dst_off, src_objlen, flags);
2430 /* Abort on short copies or on error */
2431 if (ret < src_objlen) {
2432 dout("Failed partial copy (%zd)\n", ret);
2436 err = get_rd_wr_caps(src_file, &src_got,
2437 dst_file, (dst_off + len), &dst_got);
2440 err = is_file_size_ok(src_inode, dst_inode,
2441 src_off, dst_off, len);
2446 size = i_size_read(dst_inode);
2447 bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off,
2448 src_fsc, len, flags);
2454 dout("Copied %zu bytes out of %zu\n", bytes, len);
2458 file_update_time(dst_file);
2459 inode_inc_iversion_raw(dst_inode);
2461 if (dst_off > size) {
2462 /* Let the MDS know about dst file size change */
2463 if (ceph_inode_set_size(dst_inode, dst_off) ||
2464 ceph_quota_is_max_bytes_approaching(dst_inode, dst_off))
2465 ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL);
2468 spin_lock(&dst_ci->i_ceph_lock);
2469 dst_ci->i_inline_version = CEPH_INLINE_NONE;
2470 dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf);
2471 spin_unlock(&dst_ci->i_ceph_lock);
2473 __mark_inode_dirty(dst_inode, dirty);
2476 put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got);
2479 * Do the final manual copy if we still have some bytes left, unless
2480 * there were errors in remote object copies (len >= object_size).
2482 if (len && (len < src_ci->i_layout.object_size)) {
2483 dout("Final partial copy of %zu bytes\n", len);
2484 bytes = do_splice_direct(src_file, &src_off, dst_file,
2485 &dst_off, len, flags);
2489 dout("Failed partial copy (%zd)\n", bytes);
2493 ceph_free_cap_flush(prealloc_cf);
2498 static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
2499 struct file *dst_file, loff_t dst_off,
2500 size_t len, unsigned int flags)
2504 ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
2507 if (ret == -EOPNOTSUPP || ret == -EXDEV)
2508 ret = generic_copy_file_range(src_file, src_off, dst_file,
2509 dst_off, len, flags);
2513 const struct file_operations ceph_file_fops = {
2515 .release = ceph_release,
2516 .llseek = ceph_llseek,
2517 .read_iter = ceph_read_iter,
2518 .write_iter = ceph_write_iter,
2520 .fsync = ceph_fsync,
2522 .setlease = simple_nosetlease,
2523 .flock = ceph_flock,
2524 .splice_read = generic_file_splice_read,
2525 .splice_write = iter_file_splice_write,
2526 .unlocked_ioctl = ceph_ioctl,
2527 .compat_ioctl = compat_ptr_ioctl,
2528 .fallocate = ceph_fallocate,
2529 .copy_file_range = ceph_copy_file_range,