2 * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
4 * This software may be freely redistributed under the terms of the
5 * GNU General Public License.
7 * You should have received a copy of the GNU General Public License
8 * along with this program; if not, write to the Free Software
9 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
11 * Authors: David Woodhouse <dwmw2@infradead.org>
12 * David Howells <dhowells@redhat.com>
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
20 #include <linux/pagemap.h>
21 #include <linux/sched.h>
22 #include <linux/mount.h>
23 #include <linux/namei.h>
24 #include <linux/iversion.h>
28 static const struct inode_operations afs_symlink_inode_operations = {
29 .get_link = page_get_link,
32 static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode)
34 static unsigned long once_only;
36 pr_warn("kAFS: AFS vnode with undefined type %u\n",
38 pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
39 vnode->status.abort_code,
42 vnode->status.data_version);
43 pr_warn("kAFS: vnode %llx:%llx:%x\n",
48 pr_warn("kAFS: dir %llx:%llx:%x\n",
49 parent_vnode->fid.vid,
50 parent_vnode->fid.vnode,
51 parent_vnode->fid.unique);
53 if (!test_and_set_bit(0, &once_only))
58 * Set the file size and block count. Estimate the number of 512 bytes blocks
59 * used, rounded up to nearest 1K for consistency with other AFS clients.
61 static void afs_set_i_size(struct afs_vnode *vnode, u64 size)
63 i_size_write(&vnode->vfs_inode, size);
64 vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1;
68 * Initialise an inode from the vnode status.
70 static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key,
71 struct afs_cb_interest *cbi,
72 struct afs_vnode *parent_vnode,
73 struct afs_status_cb *scb)
75 struct afs_cb_interest *old_cbi = NULL;
76 struct afs_file_status *status = &scb->status;
77 struct inode *inode = AFS_VNODE_TO_I(vnode);
80 _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
83 (unsigned long long) status->size,
87 write_seqlock(&vnode->cb_lock);
89 vnode->status = *status;
91 t = status->mtime_client;
95 inode->i_uid = make_kuid(&init_user_ns, status->owner);
96 inode->i_gid = make_kgid(&init_user_ns, status->group);
97 set_nlink(&vnode->vfs_inode, status->nlink);
99 switch (status->type) {
101 inode->i_mode = S_IFREG | status->mode;
102 inode->i_op = &afs_file_inode_operations;
103 inode->i_fop = &afs_file_operations;
104 inode->i_mapping->a_ops = &afs_fs_aops;
107 inode->i_mode = S_IFDIR | status->mode;
108 inode->i_op = &afs_dir_inode_operations;
109 inode->i_fop = &afs_dir_file_operations;
110 inode->i_mapping->a_ops = &afs_dir_aops;
112 case AFS_FTYPE_SYMLINK:
113 /* Symlinks with a mode of 0644 are actually mountpoints. */
114 if ((status->mode & 0777) == 0644) {
115 inode->i_flags |= S_AUTOMOUNT;
117 set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
119 inode->i_mode = S_IFDIR | 0555;
120 inode->i_op = &afs_mntpt_inode_operations;
121 inode->i_fop = &afs_mntpt_file_operations;
122 inode->i_mapping->a_ops = &afs_fs_aops;
124 inode->i_mode = S_IFLNK | status->mode;
125 inode->i_op = &afs_symlink_inode_operations;
126 inode->i_mapping->a_ops = &afs_fs_aops;
128 inode_nohighmem(inode);
131 dump_vnode(vnode, parent_vnode);
132 write_sequnlock(&vnode->cb_lock);
133 return afs_protocol_error(NULL, -EBADMSG, afs_eproto_file_type);
136 afs_set_i_size(vnode, status->size);
138 vnode->invalid_before = status->data_version;
139 inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
142 /* it's a symlink we just created (the fileserver
143 * didn't give us a callback) */
144 vnode->cb_expires_at = ktime_get_real_seconds();
146 vnode->cb_expires_at = scb->callback.expires_at;
147 old_cbi = rcu_dereference_protected(vnode->cb_interest,
148 lockdep_is_held(&vnode->cb_lock.lock));
150 rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(cbi));
153 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
156 write_sequnlock(&vnode->cb_lock);
157 afs_put_cb_interest(afs_v2net(vnode), old_cbi);
162 * Update the core inode struct from a returned status record.
164 static void afs_apply_status(struct afs_fs_cursor *fc,
165 struct afs_vnode *vnode,
166 struct afs_status_cb *scb,
167 const afs_dataversion_t *expected_version)
169 struct afs_file_status *status = &scb->status;
172 bool data_changed = false;
173 bool change_size = false;
175 BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags));
177 if (status->type != vnode->status.type) {
178 pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
182 status->type, vnode->status.type);
183 afs_protocol_error(NULL, -EBADMSG, afs_eproto_bad_status);
187 if (status->nlink != vnode->status.nlink)
188 set_nlink(&vnode->vfs_inode, status->nlink);
190 if (status->owner != vnode->status.owner)
191 vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
193 if (status->group != vnode->status.group)
194 vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
196 if (status->mode != vnode->status.mode) {
197 mode = vnode->vfs_inode.i_mode;
199 mode |= status->mode;
200 WRITE_ONCE(vnode->vfs_inode.i_mode, mode);
203 t = status->mtime_client;
204 vnode->vfs_inode.i_ctime = t;
205 vnode->vfs_inode.i_mtime = t;
206 vnode->vfs_inode.i_atime = t;
208 if (vnode->status.data_version != status->data_version)
211 vnode->status = *status;
213 if (expected_version &&
214 *expected_version != status->data_version) {
215 if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags))
216 pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s\n",
217 vnode->fid.vid, vnode->fid.vnode,
218 (unsigned long long)*expected_version,
219 (unsigned long long)status->data_version,
220 fc->type ? fc->type->name : "???");
222 vnode->invalid_before = status->data_version;
223 if (vnode->status.type == AFS_FTYPE_DIR) {
224 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
225 afs_stat_v(vnode, n_inval);
227 set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
231 } else if (vnode->status.type == AFS_FTYPE_DIR) {
232 /* Expected directory change is handled elsewhere so
233 * that we can locally edit the directory and save on a
236 if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
237 data_changed = false;
242 inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
244 /* Only update the size if the data version jumped. If the
245 * file is being modified locally, then we might have our own
246 * idea of what the size should be that's not the same as
247 * what's on the server.
250 afs_set_i_size(vnode, status->size);
255 * Apply a callback to a vnode.
257 static void afs_apply_callback(struct afs_fs_cursor *fc,
258 struct afs_vnode *vnode,
259 struct afs_status_cb *scb,
260 unsigned int cb_break)
262 struct afs_cb_interest *old;
263 struct afs_callback *cb = &scb->callback;
265 if (!afs_cb_is_broken(cb_break, vnode, fc->cbi)) {
266 vnode->cb_expires_at = cb->expires_at;
267 old = rcu_dereference_protected(vnode->cb_interest,
268 lockdep_is_held(&vnode->cb_lock.lock));
269 if (old != fc->cbi) {
270 rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(fc->cbi));
271 afs_put_cb_interest(afs_v2net(vnode), old);
273 set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
278 * Apply the received status and callback to an inode all in the same critical
279 * section to avoid races with afs_validate().
281 void afs_vnode_commit_status(struct afs_fs_cursor *fc,
282 struct afs_vnode *vnode,
283 unsigned int cb_break,
284 const afs_dataversion_t *expected_version,
285 struct afs_status_cb *scb)
287 if (fc->ac.error != 0)
290 write_seqlock(&vnode->cb_lock);
292 if (scb->have_error) {
293 if (scb->status.abort_code == VNOVNODE) {
294 set_bit(AFS_VNODE_DELETED, &vnode->flags);
295 clear_nlink(&vnode->vfs_inode);
296 __afs_break_callback(vnode, afs_cb_break_for_deleted);
299 if (scb->have_status)
300 afs_apply_status(fc, vnode, scb, expected_version);
302 afs_apply_callback(fc, vnode, scb, cb_break);
305 write_sequnlock(&vnode->cb_lock);
307 if (fc->ac.error == 0 && scb->have_status)
308 afs_cache_permit(vnode, fc->key, cb_break, scb);
312 * Fetch file status from the volume.
314 int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool is_new,
315 afs_access_t *_caller_access)
317 struct afs_status_cb *scb;
318 struct afs_fs_cursor fc;
321 _enter("%s,{%llx:%llu.%u,S=%lx}",
323 vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique,
326 scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
331 if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
332 afs_dataversion_t data_version = vnode->status.data_version;
334 while (afs_select_fileserver(&fc)) {
335 fc.cb_break = afs_calc_vnode_cb_break(vnode);
336 afs_fs_fetch_file_status(&fc, scb, NULL);
342 ret = afs_inode_init_from_status(vnode, key, fc.cbi,
346 afs_cache_permit(vnode, key, fc.cb_break, scb);
348 afs_vnode_commit_status(&fc, vnode, fc.cb_break,
351 afs_check_for_remote_deletion(&fc, vnode);
352 ret = afs_end_vnode_operation(&fc);
355 if (ret == 0 && _caller_access)
356 *_caller_access = scb->status.caller_access;
358 _leave(" = %d", ret);
365 int afs_iget5_test(struct inode *inode, void *opaque)
367 struct afs_iget_data *iget_data = opaque;
368 struct afs_vnode *vnode = AFS_FS_I(inode);
370 return memcmp(&vnode->fid, &iget_data->fid, sizeof(iget_data->fid)) == 0;
374 * iget5() comparator for inode created by autocell operations
376 * These pseudo inodes don't match anything.
378 static int afs_iget5_pseudo_dir_test(struct inode *inode, void *opaque)
384 * iget5() inode initialiser
386 static int afs_iget5_set(struct inode *inode, void *opaque)
388 struct afs_iget_data *iget_data = opaque;
389 struct afs_vnode *vnode = AFS_FS_I(inode);
391 vnode->fid = iget_data->fid;
392 vnode->volume = iget_data->volume;
393 vnode->cb_v_break = iget_data->cb_v_break;
394 vnode->cb_s_break = iget_data->cb_s_break;
396 /* YFS supports 96-bit vnode IDs, but Linux only supports
397 * 64-bit inode numbers.
399 inode->i_ino = iget_data->fid.vnode;
400 inode->i_generation = iget_data->fid.unique;
405 * Create an inode for a dynamic root directory or an autocell dynamic
408 struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
410 struct afs_super_info *as;
411 struct afs_vnode *vnode;
413 static atomic_t afs_autocell_ino;
415 struct afs_iget_data iget_data = {
424 iget_data.volume = as->volume;
425 iget_data.fid.vid = as->volume->vid;
428 iget_data.fid.vnode = 1;
429 iget_data.fid.unique = 1;
431 iget_data.fid.vnode = atomic_inc_return(&afs_autocell_ino);
432 iget_data.fid.unique = 0;
435 inode = iget5_locked(sb, iget_data.fid.vnode,
436 afs_iget5_pseudo_dir_test, afs_iget5_set,
439 _leave(" = -ENOMEM");
440 return ERR_PTR(-ENOMEM);
443 _debug("GOT INODE %p { ino=%lu, vl=%llx, vn=%llx, u=%x }",
444 inode, inode->i_ino, iget_data.fid.vid, iget_data.fid.vnode,
445 iget_data.fid.unique);
447 vnode = AFS_FS_I(inode);
449 /* there shouldn't be an existing inode */
450 BUG_ON(!(inode->i_state & I_NEW));
453 inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO;
455 inode->i_op = &afs_dynroot_inode_operations;
456 inode->i_fop = &simple_dir_operations;
458 inode->i_op = &afs_autocell_inode_operations;
461 inode->i_uid = GLOBAL_ROOT_UID;
462 inode->i_gid = GLOBAL_ROOT_GID;
463 inode->i_ctime = inode->i_atime = inode->i_mtime = current_time(inode);
465 inode_set_iversion_raw(inode, 0);
466 inode->i_generation = 0;
468 set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags);
470 set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
471 inode->i_flags |= S_AUTOMOUNT;
474 inode->i_flags |= S_NOATIME;
475 unlock_new_inode(inode);
476 _leave(" = %p", inode);
481 * Get a cache cookie for an inode.
483 static void afs_get_inode_cache(struct afs_vnode *vnode)
485 #ifdef CONFIG_AFS_FSCACHE
489 u32 vnode_id_ext[2]; /* Allow for a 96-bit key */
491 struct afs_vnode_cache_aux aux;
493 if (vnode->status.type == AFS_FTYPE_DIR) {
498 key.vnode_id = vnode->fid.vnode;
499 key.unique = vnode->fid.unique;
500 key.vnode_id_ext[0] = vnode->fid.vnode >> 32;
501 key.vnode_id_ext[1] = vnode->fid.vnode_hi;
502 aux.data_version = vnode->status.data_version;
504 vnode->cache = fscache_acquire_cookie(vnode->volume->cache,
505 &afs_vnode_cache_index_def,
508 vnode, vnode->status.size, true);
515 struct inode *afs_iget(struct super_block *sb, struct key *key,
516 struct afs_iget_data *iget_data,
517 struct afs_status_cb *scb,
518 struct afs_cb_interest *cbi,
519 struct afs_vnode *parent_vnode)
521 struct afs_super_info *as;
522 struct afs_vnode *vnode;
523 struct afs_fid *fid = &iget_data->fid;
527 _enter(",{%llx:%llu.%u},,", fid->vid, fid->vnode, fid->unique);
530 iget_data->volume = as->volume;
532 inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set,
535 _leave(" = -ENOMEM");
536 return ERR_PTR(-ENOMEM);
539 _debug("GOT INODE %p { vl=%llx vn=%llx, u=%x }",
540 inode, fid->vid, fid->vnode, fid->unique);
542 vnode = AFS_FS_I(inode);
544 /* deal with an existing inode */
545 if (!(inode->i_state & I_NEW)) {
546 _leave(" = %p", inode);
551 /* it's a remotely extant inode */
552 ret = afs_fetch_status(vnode, key, true, NULL);
556 ret = afs_inode_init_from_status(vnode, key, cbi, parent_vnode,
562 afs_get_inode_cache(vnode);
565 clear_bit(AFS_VNODE_UNSET, &vnode->flags);
566 inode->i_flags |= S_NOATIME;
567 unlock_new_inode(inode);
568 _leave(" = %p", inode);
574 _leave(" = %d [bad]", ret);
579 * mark the data attached to an inode as obsolete due to a write on the server
580 * - might also want to ditch all the outstanding writes and dirty pages
582 void afs_zap_data(struct afs_vnode *vnode)
584 _enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
586 #ifdef CONFIG_AFS_FSCACHE
587 fscache_invalidate(vnode->cache);
590 /* nuke all the non-dirty pages that aren't locked, mapped or being
591 * written back in a regular file and completely discard the pages in a
592 * directory or symlink */
593 if (S_ISREG(vnode->vfs_inode.i_mode))
594 invalidate_remote_inode(&vnode->vfs_inode);
596 invalidate_inode_pages2(vnode->vfs_inode.i_mapping);
600 * Check the validity of a vnode/inode.
602 bool afs_check_validity(struct afs_vnode *vnode)
604 struct afs_cb_interest *cbi;
605 struct afs_server *server;
606 struct afs_volume *volume = vnode->volume;
607 enum afs_cb_break_reason need_clear = afs_cb_break_no_break;
608 time64_t now = ktime_get_real_seconds();
610 unsigned int cb_break, cb_s_break, cb_v_break;
614 read_seqbegin_or_lock(&vnode->cb_lock, &seq);
615 cb_v_break = READ_ONCE(volume->cb_v_break);
616 cb_break = vnode->cb_break;
618 if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
619 cbi = rcu_dereference(vnode->cb_interest);
620 server = rcu_dereference(cbi->server);
621 cb_s_break = READ_ONCE(server->cb_s_break);
623 if (vnode->cb_s_break != cb_s_break ||
624 vnode->cb_v_break != cb_v_break) {
625 vnode->cb_s_break = cb_s_break;
626 vnode->cb_v_break = cb_v_break;
627 need_clear = afs_cb_break_for_vsbreak;
629 } else if (test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
630 need_clear = afs_cb_break_for_zap;
632 } else if (vnode->cb_expires_at - 10 <= now) {
633 need_clear = afs_cb_break_for_lapsed;
638 } else if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
641 vnode->cb_v_break = cb_v_break;
645 } while (need_seqretry(&vnode->cb_lock, seq));
647 done_seqretry(&vnode->cb_lock, seq);
649 if (need_clear != afs_cb_break_no_break) {
650 write_seqlock(&vnode->cb_lock);
651 if (cb_break == vnode->cb_break)
652 __afs_break_callback(vnode, need_clear);
654 trace_afs_cb_miss(&vnode->fid, need_clear);
655 write_sequnlock(&vnode->cb_lock);
663 * validate a vnode/inode
664 * - there are several things we need to check
665 * - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
667 * - parent dir metadata changed (security changes)
668 * - dentry data changed (write, truncate)
669 * - dentry metadata changed (security changes)
671 int afs_validate(struct afs_vnode *vnode, struct key *key)
676 _enter("{v={%llx:%llu} fl=%lx},%x",
677 vnode->fid.vid, vnode->fid.vnode, vnode->flags,
681 valid = afs_check_validity(vnode);
684 if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
685 clear_nlink(&vnode->vfs_inode);
690 down_write(&vnode->validate_lock);
692 /* if the promise has expired, we need to check the server again to get
693 * a new promise - note that if the (parent) directory's metadata was
694 * changed then the security may be different and we may no longer have
696 if (!test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
697 _debug("not promised");
698 ret = afs_fetch_status(vnode, key, false, NULL);
700 if (ret == -ENOENT) {
701 set_bit(AFS_VNODE_DELETED, &vnode->flags);
706 _debug("new promise [fl=%lx]", vnode->flags);
709 if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
710 _debug("file already deleted");
715 /* if the vnode's data version number changed then its contents are
717 if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags))
719 up_write(&vnode->validate_lock);
725 up_write(&vnode->validate_lock);
726 _leave(" = %d", ret);
731 * read the attributes of an inode
733 int afs_getattr(const struct path *path, struct kstat *stat,
734 u32 request_mask, unsigned int query_flags)
736 struct inode *inode = d_inode(path->dentry);
737 struct afs_vnode *vnode = AFS_FS_I(inode);
741 _enter("{ ino=%lu v=%u }", inode->i_ino, inode->i_generation);
744 !(query_flags & AT_STATX_DONT_SYNC) &&
745 !test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
746 key = afs_request_key(vnode->volume->cell);
749 ret = afs_validate(vnode, key);
756 read_seqbegin_or_lock(&vnode->cb_lock, &seq);
757 generic_fillattr(inode, stat);
758 } while (need_seqretry(&vnode->cb_lock, seq));
760 done_seqretry(&vnode->cb_lock, seq);
765 * discard an AFS inode
767 int afs_drop_inode(struct inode *inode)
771 if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
772 return generic_delete_inode(inode);
774 return generic_drop_inode(inode);
780 void afs_evict_inode(struct inode *inode)
782 struct afs_cb_interest *cbi;
783 struct afs_vnode *vnode;
785 vnode = AFS_FS_I(inode);
787 _enter("{%llx:%llu.%d}",
792 _debug("CLEAR INODE %p", inode);
794 ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode);
796 truncate_inode_pages_final(&inode->i_data);
799 write_seqlock(&vnode->cb_lock);
800 cbi = rcu_dereference_protected(vnode->cb_interest,
801 lockdep_is_held(&vnode->cb_lock.lock));
803 afs_put_cb_interest(afs_i2net(inode), cbi);
804 rcu_assign_pointer(vnode->cb_interest, NULL);
806 write_sequnlock(&vnode->cb_lock);
808 while (!list_empty(&vnode->wb_keys)) {
809 struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next,
810 struct afs_wb_key, vnode_link);
811 list_del(&wbk->vnode_link);
815 #ifdef CONFIG_AFS_FSCACHE
817 struct afs_vnode_cache_aux aux;
819 aux.data_version = vnode->status.data_version;
820 fscache_relinquish_cookie(vnode->cache, &aux,
821 test_bit(AFS_VNODE_DELETED, &vnode->flags));
826 afs_prune_wb_keys(vnode);
827 afs_put_permits(rcu_access_pointer(vnode->permit_cache));
828 key_put(vnode->silly_key);
829 vnode->silly_key = NULL;
830 key_put(vnode->lock_key);
831 vnode->lock_key = NULL;
836 * set the attributes of an inode
838 int afs_setattr(struct dentry *dentry, struct iattr *attr)
840 struct afs_fs_cursor fc;
841 struct afs_status_cb *scb;
842 struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
846 _enter("{%llx:%llu},{n=%pd},%x",
847 vnode->fid.vid, vnode->fid.vnode, dentry,
850 if (!(attr->ia_valid & (ATTR_SIZE | ATTR_MODE | ATTR_UID | ATTR_GID |
852 _leave(" = 0 [unsupported]");
856 scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
860 /* flush any dirty data outstanding on a regular file */
861 if (S_ISREG(vnode->vfs_inode.i_mode))
862 filemap_write_and_wait(vnode->vfs_inode.i_mapping);
864 if (attr->ia_valid & ATTR_FILE) {
865 key = afs_file_key(attr->ia_file);
867 key = afs_request_key(vnode->volume->cell);
875 if (afs_begin_vnode_operation(&fc, vnode, key, false)) {
876 afs_dataversion_t data_version = vnode->status.data_version;
878 if (attr->ia_valid & ATTR_SIZE)
881 while (afs_select_fileserver(&fc)) {
882 fc.cb_break = afs_calc_vnode_cb_break(vnode);
883 afs_fs_setattr(&fc, attr, scb);
886 afs_check_for_remote_deletion(&fc, vnode);
887 afs_vnode_commit_status(&fc, vnode, fc.cb_break,
889 ret = afs_end_vnode_operation(&fc);
892 if (!(attr->ia_valid & ATTR_FILE))
898 _leave(" = %d", ret);