2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/vfs/hammer/hammer_inode.c,v 1.52 2008/05/05 20:34:47 dillon Exp $
38 #include <vm/vm_extern.h>
42 static int hammer_unload_inode(struct hammer_inode *ip);
43 static void hammer_flush_inode_core(hammer_inode_t ip, int flags);
44 static int hammer_setup_child_callback(hammer_record_t rec, void *data);
45 static int hammer_setup_parent_inodes(hammer_record_t record);
48 * The kernel is not actively referencing this vnode but is still holding
51 * This is called from the frontend.
54 hammer_vop_inactive(struct vop_inactive_args *ap)
56 struct hammer_inode *ip = VTOI(ap->a_vp);
67 * If the inode no longer has visibility in the filesystem and is
68 * fairly clean, try to recycle it immediately. This can deadlock
69 * in vfsync() if we aren't careful.
71 hammer_inode_unloadable_check(ip, 0);
72 if (ip->flags & HAMMER_INODE_MODMASK)
73 hammer_flush_inode(ip, 0);
74 else if (ip->ino_rec.ino_nlinks == 0)
80 * Release the vnode association. This is typically (but not always)
81 * the last reference on the inode.
83 * Once the association is lost we are on our own with regards to
87 hammer_vop_reclaim(struct vop_reclaim_args *ap)
89 struct hammer_inode *ip;
94 if ((ip = vp->v_data) != NULL) {
97 hammer_rel_inode(ip, 1);
103 * Return a locked vnode for the specified inode. The inode must be
104 * referenced but NOT LOCKED on entry and will remain referenced on
107 * Called from the frontend.
110 hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp)
116 if ((vp = ip->vp) == NULL) {
117 error = getnewvnode(VT_HAMMER, ip->hmp->mp, vpp, 0, 0);
120 hammer_lock_ex(&ip->lock);
121 if (ip->vp != NULL) {
122 hammer_unlock(&ip->lock);
127 hammer_ref(&ip->lock);
130 vp->v_type = hammer_get_vnode_type(
131 ip->ino_rec.base.base.obj_type);
133 switch(ip->ino_rec.base.base.obj_type) {
134 case HAMMER_OBJTYPE_CDEV:
135 case HAMMER_OBJTYPE_BDEV:
136 vp->v_ops = &ip->hmp->mp->mnt_vn_spec_ops;
137 addaliasu(vp, ip->ino_data.rmajor,
138 ip->ino_data.rminor);
140 case HAMMER_OBJTYPE_FIFO:
141 vp->v_ops = &ip->hmp->mp->mnt_vn_fifo_ops;
148 * Only mark as the root vnode if the ip is not
149 * historical, otherwise the VFS cache will get
150 * confused. The other half of the special handling
151 * is in hammer_vop_nlookupdotdot().
153 if (ip->obj_id == HAMMER_OBJID_ROOT &&
154 ip->obj_asof == ip->hmp->asof) {
158 vp->v_data = (void *)ip;
159 /* vnode locked by getnewvnode() */
160 /* make related vnode dirty if inode dirty? */
161 hammer_unlock(&ip->lock);
162 if (vp->v_type == VREG)
163 vinitvmio(vp, ip->ino_rec.ino_size);
168 * loop if the vget fails (aka races), or if the vp
169 * no longer matches ip->vp.
171 if (vget(vp, LK_EXCLUSIVE) == 0) {
182 * Acquire a HAMMER inode. The returned inode is not locked. These functions
183 * do not attach or detach the related vnode (use hammer_get_vnode() for
186 * The flags argument is only applied for newly created inodes, and only
187 * certain flags are inherited.
189 * Called from the frontend.
191 struct hammer_inode *
192 hammer_get_inode(hammer_transaction_t trans, struct hammer_node **cache,
193 u_int64_t obj_id, hammer_tid_t asof, int flags, int *errorp)
195 hammer_mount_t hmp = trans->hmp;
196 struct hammer_inode_info iinfo;
197 struct hammer_cursor cursor;
198 struct hammer_inode *ip;
201 * Determine if we already have an inode cached. If we do then
204 iinfo.obj_id = obj_id;
205 iinfo.obj_asof = asof;
207 ip = hammer_ino_rb_tree_RB_LOOKUP_INFO(&hmp->rb_inos_root, &iinfo);
209 hammer_ref(&ip->lock);
214 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
215 ++hammer_count_inodes;
217 ip->obj_asof = iinfo.obj_asof;
219 ip->flags = flags & HAMMER_INODE_RO;
221 ip->flags |= HAMMER_INODE_RO;
222 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
223 RB_INIT(&ip->rec_tree);
224 TAILQ_INIT(&ip->bio_list);
225 TAILQ_INIT(&ip->bio_alt_list);
226 TAILQ_INIT(&ip->target_list);
229 * Locate the on-disk inode.
232 hammer_init_cursor(trans, &cursor, cache, NULL);
233 cursor.key_beg.obj_id = ip->obj_id;
234 cursor.key_beg.key = 0;
235 cursor.key_beg.create_tid = 0;
236 cursor.key_beg.delete_tid = 0;
237 cursor.key_beg.rec_type = HAMMER_RECTYPE_INODE;
238 cursor.key_beg.obj_type = 0;
239 cursor.asof = iinfo.obj_asof;
240 cursor.flags = HAMMER_CURSOR_GET_RECORD | HAMMER_CURSOR_GET_DATA |
243 *errorp = hammer_btree_lookup(&cursor);
244 if (*errorp == EDEADLK) {
245 hammer_done_cursor(&cursor);
250 * On success the B-Tree lookup will hold the appropriate
251 * buffer cache buffers and provide a pointer to the requested
252 * information. Copy the information to the in-memory inode
253 * and cache the B-Tree node to improve future operations.
256 ip->ino_rec = cursor.record->inode;
257 ip->ino_data = cursor.data->inode;
258 hammer_cache_node(cursor.node, &ip->cache[0]);
260 hammer_cache_node(cursor.node, cache);
264 * On success load the inode's record and data and insert the
265 * inode into the B-Tree. It is possible to race another lookup
266 * insertion of the same inode so deal with that condition too.
268 * The cursor's locked node interlocks against others creating and
269 * destroying ip while we were blocked.
272 hammer_ref(&ip->lock);
273 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
274 hammer_uncache_node(&ip->cache[0]);
275 hammer_uncache_node(&ip->cache[1]);
276 KKASSERT(ip->lock.refs == 1);
277 --hammer_count_inodes;
279 hammer_done_cursor(&cursor);
282 ip->flags |= HAMMER_INODE_ONDISK;
285 * Do not panic on read-only accesses which fail, particularly
286 * historical accesses where the snapshot might not have
287 * complete connectivity.
289 if ((flags & HAMMER_INODE_RO) == 0) {
290 kprintf("hammer_get_inode: failed ip %p obj_id %016llx cursor %p error %d\n",
291 ip, ip->obj_id, &cursor, *errorp);
294 --hammer_count_inodes;
298 hammer_done_cursor(&cursor);
303 * Create a new filesystem object, returning the inode in *ipp. The
304 * returned inode will be referenced.
306 * The inode is created in-memory.
309 hammer_create_inode(hammer_transaction_t trans, struct vattr *vap,
310 struct ucred *cred, hammer_inode_t dip,
311 struct hammer_inode **ipp)
318 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
319 ++hammer_count_inodes;
320 ip->obj_id = hammer_alloc_objid(trans, dip);
321 KKASSERT(ip->obj_id != 0);
322 ip->obj_asof = hmp->asof;
324 ip->flush_state = HAMMER_FST_IDLE;
325 ip->flags = HAMMER_INODE_DDIRTY | HAMMER_INODE_RDIRTY |
328 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
329 RB_INIT(&ip->rec_tree);
330 TAILQ_INIT(&ip->bio_list);
331 TAILQ_INIT(&ip->bio_alt_list);
332 TAILQ_INIT(&ip->target_list);
334 ip->ino_rec.ino_atime = trans->time;
335 ip->ino_rec.ino_mtime = trans->time;
336 ip->ino_rec.ino_size = 0;
337 ip->ino_rec.ino_nlinks = 0;
339 ip->ino_rec.base.base.btype = HAMMER_BTREE_TYPE_RECORD;
340 ip->ino_rec.base.base.obj_id = ip->obj_id;
341 ip->ino_rec.base.base.key = 0;
342 ip->ino_rec.base.base.create_tid = 0;
343 ip->ino_rec.base.base.delete_tid = 0;
344 ip->ino_rec.base.base.rec_type = HAMMER_RECTYPE_INODE;
345 ip->ino_rec.base.base.obj_type = hammer_get_obj_type(vap->va_type);
347 ip->ino_data.version = HAMMER_INODE_DATA_VERSION;
348 ip->ino_data.mode = vap->va_mode;
349 ip->ino_data.ctime = trans->time;
350 ip->ino_data.parent_obj_id = (dip) ? dip->ino_rec.base.base.obj_id : 0;
352 switch(ip->ino_rec.base.base.obj_type) {
353 case HAMMER_OBJTYPE_CDEV:
354 case HAMMER_OBJTYPE_BDEV:
355 ip->ino_data.rmajor = vap->va_rmajor;
356 ip->ino_data.rminor = vap->va_rminor;
363 * Calculate default uid/gid and overwrite with information from
366 xuid = hammer_to_unix_xid(&dip->ino_data.uid);
367 ip->ino_data.gid = dip->ino_data.gid;
368 xuid = vop_helper_create_uid(hmp->mp, dip->ino_data.mode, xuid, cred,
370 ip->ino_data.mode = vap->va_mode;
372 if (vap->va_vaflags & VA_UID_UUID_VALID)
373 ip->ino_data.uid = vap->va_uid_uuid;
374 else if (vap->va_uid != (uid_t)VNOVAL)
375 hammer_guid_to_uuid(&ip->ino_data.uid, xuid);
376 if (vap->va_vaflags & VA_GID_UUID_VALID)
377 ip->ino_data.gid = vap->va_gid_uuid;
378 else if (vap->va_gid != (gid_t)VNOVAL)
379 hammer_guid_to_uuid(&ip->ino_data.gid, vap->va_gid);
381 hammer_ref(&ip->lock);
382 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
383 hammer_unref(&ip->lock);
384 panic("hammer_create_inode: duplicate obj_id %llx", ip->obj_id);
391 * Called by hammer_sync_inode().
394 hammer_update_inode(hammer_cursor_t cursor, hammer_inode_t ip)
396 hammer_transaction_t trans = cursor->trans;
397 hammer_record_t record;
404 * If the inode has a presence on-disk then locate it and mark
405 * it deleted, setting DELONDISK.
407 * The record may or may not be physically deleted, depending on
408 * the retention policy.
410 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
411 HAMMER_INODE_ONDISK) {
412 hammer_normalize_cursor(cursor);
413 cursor->key_beg.obj_id = ip->obj_id;
414 cursor->key_beg.key = 0;
415 cursor->key_beg.create_tid = 0;
416 cursor->key_beg.delete_tid = 0;
417 cursor->key_beg.rec_type = HAMMER_RECTYPE_INODE;
418 cursor->key_beg.obj_type = 0;
419 cursor->asof = ip->obj_asof;
420 cursor->flags &= ~HAMMER_CURSOR_INITMASK;
421 cursor->flags |= HAMMER_CURSOR_GET_RECORD | HAMMER_CURSOR_ASOF;
422 cursor->flags |= HAMMER_CURSOR_BACKEND;
424 error = hammer_btree_lookup(cursor);
425 if (hammer_debug_inode)
426 kprintf("IPDEL %p %08x %d", ip, ip->flags, error);
428 kprintf("error %d\n", error);
429 Debugger("hammer_update_inode");
433 error = hammer_ip_delete_record(cursor, trans->tid);
434 if (hammer_debug_inode)
435 kprintf(" error %d\n", error);
436 if (error && error != EDEADLK) {
437 kprintf("error %d\n", error);
438 Debugger("hammer_update_inode2");
441 ip->flags |= HAMMER_INODE_DELONDISK;
444 hammer_cache_node(cursor->node, &ip->cache[0]);
446 if (error == EDEADLK) {
447 hammer_done_cursor(cursor);
448 error = hammer_init_cursor(trans, cursor,
450 if (hammer_debug_inode)
451 kprintf("IPDED %p %d\n", ip, error);
458 * Ok, write out the initial record or a new record (after deleting
459 * the old one), unless the DELETED flag is set. This routine will
460 * clear DELONDISK if it writes out a record.
462 * Update our inode statistics if this is the first application of
465 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED) == 0) {
467 * Generate a record and write it to the media
469 record = hammer_alloc_mem_record(ip);
470 record->type = HAMMER_MEM_RECORD_GENERAL;
471 record->flush_state = HAMMER_FST_FLUSH;
472 record->rec.inode = ip->sync_ino_rec;
473 record->rec.inode.base.base.create_tid = trans->tid;
474 record->rec.inode.base.data_len = sizeof(ip->sync_ino_data);
475 record->rec.base.signature = HAMMER_RECORD_SIGNATURE_GOOD;
476 record->data = (void *)&ip->sync_ino_data;
477 record->flags |= HAMMER_RECF_INTERLOCK_BE;
479 error = hammer_ip_sync_record_cursor(cursor, record);
480 if (hammer_debug_inode)
481 kprintf("GENREC %p rec %08x %d\n",
482 ip, record->flags, error);
483 if (error != EDEADLK)
485 hammer_done_cursor(cursor);
486 error = hammer_init_cursor(trans, cursor,
488 if (hammer_debug_inode)
489 kprintf("GENREC reinit %d\n", error);
494 kprintf("error %d\n", error);
495 Debugger("hammer_update_inode3");
499 * The record isn't managed by the inode's record tree,
500 * destroy it whether we succeed or fail.
502 record->flags &= ~HAMMER_RECF_INTERLOCK_BE;
503 record->flags |= HAMMER_RECF_DELETED_FE;
504 record->flush_state = HAMMER_FST_IDLE;
505 hammer_rel_mem_record(record);
511 if (hammer_debug_inode)
512 kprintf("CLEANDELOND %p %08x\n", ip, ip->flags);
513 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY |
514 HAMMER_INODE_DDIRTY |
515 HAMMER_INODE_ITIMES);
516 ip->flags &= ~HAMMER_INODE_DELONDISK;
519 * Root volume count of inodes
521 if ((ip->flags & HAMMER_INODE_ONDISK) == 0) {
522 hammer_modify_volume_field(trans,
525 ++ip->hmp->rootvol->ondisk->vol0_stat_inodes;
526 hammer_modify_volume_done(trans->rootvol);
527 ip->flags |= HAMMER_INODE_ONDISK;
528 if (hammer_debug_inode)
529 kprintf("NOWONDISK %p\n", ip);
535 * If the inode has been destroyed, clean out any left-over flags
536 * that may have been set by the frontend.
538 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED)) {
539 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY |
540 HAMMER_INODE_DDIRTY |
541 HAMMER_INODE_ITIMES);
547 * Update only the itimes fields. This is done no-historically. The
548 * record is updated in-place on the disk.
551 hammer_update_itimes(hammer_cursor_t cursor, hammer_inode_t ip)
553 hammer_transaction_t trans = cursor->trans;
554 struct hammer_inode_record *rec;
559 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
560 HAMMER_INODE_ONDISK) {
561 hammer_normalize_cursor(cursor);
562 cursor->key_beg.obj_id = ip->obj_id;
563 cursor->key_beg.key = 0;
564 cursor->key_beg.create_tid = 0;
565 cursor->key_beg.delete_tid = 0;
566 cursor->key_beg.rec_type = HAMMER_RECTYPE_INODE;
567 cursor->key_beg.obj_type = 0;
568 cursor->asof = ip->obj_asof;
569 cursor->flags &= ~HAMMER_CURSOR_INITMASK;
570 cursor->flags |= HAMMER_CURSOR_GET_RECORD | HAMMER_CURSOR_ASOF;
571 cursor->flags |= HAMMER_CURSOR_BACKEND;
573 error = hammer_btree_lookup(cursor);
575 kprintf("error %d\n", error);
576 Debugger("hammer_update_itimes1");
580 * Do not generate UNDO records for atime/mtime
583 rec = &cursor->record->inode;
584 hammer_modify_record_noundo(trans,
585 cursor->record_buffer,
587 rec->ino_atime = ip->sync_ino_rec.ino_atime;
588 rec->ino_mtime = ip->sync_ino_rec.ino_mtime;
589 hammer_modify_record_done(cursor->record_buffer,
591 ip->sync_flags &= ~HAMMER_INODE_ITIMES;
592 /* XXX recalculate crc */
593 hammer_cache_node(cursor->node, &ip->cache[0]);
595 if (error == EDEADLK) {
596 hammer_done_cursor(cursor);
597 error = hammer_init_cursor(trans, cursor,
607 * Release a reference on an inode, flush as requested.
609 * On the last reference we queue the inode to the flusher for its final
613 hammer_rel_inode(struct hammer_inode *ip, int flush)
615 hammer_mount_t hmp = ip->hmp;
618 * Handle disposition when dropping the last ref.
621 if (ip->lock.refs == 1) {
623 * Determine whether on-disk action is needed for
624 * the inode's final disposition.
626 KKASSERT(ip->vp == NULL);
627 hammer_inode_unloadable_check(ip, 0);
628 if (ip->flags & HAMMER_INODE_MODMASK) {
629 hammer_flush_inode(ip, 0);
630 } else if (ip->lock.refs == 1) {
631 hammer_unload_inode(ip);
636 hammer_flush_inode(ip, 0);
639 * The inode still has multiple refs, try to drop
642 KKASSERT(ip->lock.refs >= 1);
643 if (ip->lock.refs > 1) {
644 hammer_unref(&ip->lock);
651 * XXX bad hack until I add code to track inodes in SETUP. We
652 * can queue a lot of inodes to the syncer but if we don't wake
653 * it up the undo sets will be too large or too many unflushed
654 * records will build up and blow our malloc limit.
656 if (++hmp->reclaim_count > 256) {
657 hmp->reclaim_count = 0;
658 hammer_flusher_async(hmp);
663 * Unload and destroy the specified inode. Must be called with one remaining
664 * reference. The reference is disposed of.
666 * This can only be called in the context of the flusher.
669 hammer_unload_inode(struct hammer_inode *ip)
671 KASSERT(ip->lock.refs == 1,
672 ("hammer_unload_inode: %d refs\n", ip->lock.refs));
673 KKASSERT(ip->vp == NULL);
674 KKASSERT(ip->flush_state == HAMMER_FST_IDLE);
675 KKASSERT(ip->cursor_ip_refs == 0);
676 KKASSERT((ip->flags & HAMMER_INODE_MODMASK) == 0);
678 KKASSERT(RB_EMPTY(&ip->rec_tree));
679 KKASSERT(TAILQ_EMPTY(&ip->target_list));
680 KKASSERT(TAILQ_EMPTY(&ip->bio_list));
681 KKASSERT(TAILQ_EMPTY(&ip->bio_alt_list));
683 RB_REMOVE(hammer_ino_rb_tree, &ip->hmp->rb_inos_root, ip);
685 hammer_uncache_node(&ip->cache[0]);
686 hammer_uncache_node(&ip->cache[1]);
688 hammer_clear_objid(ip);
689 --hammer_count_inodes;
696 * A transaction has modified an inode, requiring updates as specified by
699 * HAMMER_INODE_RDIRTY: Inode record has been updated
700 * HAMMER_INODE_DDIRTY: Inode data has been updated
701 * HAMMER_INODE_XDIRTY: Dirty in-memory records
702 * HAMMER_INODE_BUFS: Dirty buffer cache buffers
703 * HAMMER_INODE_DELETED: Inode record/data must be deleted
704 * HAMMER_INODE_ITIMES: mtime/atime has been updated
707 hammer_modify_inode(hammer_transaction_t trans, hammer_inode_t ip, int flags)
709 KKASSERT ((ip->flags & HAMMER_INODE_RO) == 0 ||
710 (flags & (HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
711 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS|
712 HAMMER_INODE_DELETED|HAMMER_INODE_ITIMES)) == 0);
718 * Request that an inode be flushed. This whole mess cannot block and may
719 * recurse. Once requested HAMMER will attempt to actively flush it until
720 * the flush can be done.
722 * The inode may already be flushing, or may be in a setup state. We can
723 * place the inode in a flushing state if it is currently idle and flag it
724 * to reflush if it is currently flushing.
727 hammer_flush_inode(hammer_inode_t ip, int flags)
729 hammer_record_t depend;
733 * Trivial 'nothing to flush' case. If the inode is ina SETUP
734 * state we have to put it back into an IDLE state so we can
735 * drop the extra ref.
737 if ((ip->flags & HAMMER_INODE_MODMASK) == 0) {
738 if (ip->flush_state == HAMMER_FST_SETUP) {
739 ip->flush_state = HAMMER_FST_IDLE;
740 hammer_rel_inode(ip, 0);
746 * Our flush action will depend on the current state.
748 switch(ip->flush_state) {
749 case HAMMER_FST_IDLE:
751 * We have no dependancies and can flush immediately. Some
752 * our children may not be flushable so we have to re-test
753 * with that additional knowledge.
755 hammer_flush_inode_core(ip, flags);
757 case HAMMER_FST_SETUP:
759 * Recurse upwards through dependancies via target_list
760 * and start their flusher actions going if possible.
762 * 'good' is our connectivity. -1 means we have none and
763 * can't flush, 0 means there weren't any dependancies, and
764 * 1 means we have good connectivity.
767 TAILQ_FOREACH(depend, &ip->target_list, target_entry) {
768 r = hammer_setup_parent_inodes(depend);
769 if (r < 0 && good == 0)
776 * We can continue if good >= 0. Determine how many records
777 * under our inode can be flushed (and mark them).
780 hammer_flush_inode_core(ip, flags);
782 ip->flags |= HAMMER_INODE_REFLUSH;
783 if (flags & HAMMER_FLUSH_SIGNAL) {
784 ip->flags |= HAMMER_INODE_RESIGNAL;
785 hammer_flusher_async(ip->hmp);
791 * We are already flushing, flag the inode to reflush
792 * if needed after it completes its current flush.
794 if ((ip->flags & HAMMER_INODE_REFLUSH) == 0)
795 ip->flags |= HAMMER_INODE_REFLUSH;
796 if (flags & HAMMER_FLUSH_SIGNAL) {
797 ip->flags |= HAMMER_INODE_RESIGNAL;
798 hammer_flusher_async(ip->hmp);
805 * We are asked to recurse upwards and convert the record from SETUP
806 * to FLUSH if possible. record->ip is a parent of the caller's inode,
807 * and record->target_ip is the caller's inode.
809 * Return 1 if the record gives us connectivity
811 * Return 0 if the record is not relevant
813 * Return -1 if we can't resolve the dependancy and there is no connectivity.
816 hammer_setup_parent_inodes(hammer_record_t record)
818 hammer_mount_t hmp = record->ip->hmp;
819 hammer_record_t depend;
823 KKASSERT(record->flush_state != HAMMER_FST_IDLE);
827 * If the record is already flushing, is it in our flush group?
829 * If it is in our flush group but it is a general record or a
830 * delete-on-disk, it does not improve our connectivity (return 0),
831 * and if the target inode is not trying to destroy itself we can't
832 * allow the operation yet anyway (the second return -1).
834 if (record->flush_state == HAMMER_FST_FLUSH) {
835 if (record->flush_group != hmp->flusher_next) {
836 ip->flags |= HAMMER_INODE_REFLUSH;
839 if (record->type == HAMMER_MEM_RECORD_ADD)
846 * It must be a setup record. Try to resolve the setup dependancies
847 * by recursing upwards so we can place ip on the flush list.
849 KKASSERT(record->flush_state == HAMMER_FST_SETUP);
852 TAILQ_FOREACH(depend, &ip->target_list, target_entry) {
853 r = hammer_setup_parent_inodes(depend);
854 if (r < 0 && good == 0)
861 * We can't flush ip because it has no connectivity (XXX also check
862 * nlinks for pre-existing connectivity!). Flag it so any resolution
863 * recurses back down.
866 ip->flags |= HAMMER_INODE_REFLUSH;
871 * We are go, place the parent inode in a flushing state so we can
872 * place its record in a flushing state. Note that the parent
873 * may already be flushing. The record must be in the same flush
874 * group as the parent.
876 if (ip->flush_state != HAMMER_FST_FLUSH)
877 hammer_flush_inode_core(ip, HAMMER_FLUSH_RECURSION);
878 KKASSERT(ip->flush_state == HAMMER_FST_FLUSH);
879 KKASSERT(record->flush_state == HAMMER_FST_SETUP);
882 if (record->type == HAMMER_MEM_RECORD_DEL &&
883 (record->target_ip->flags & (HAMMER_INODE_DELETED|HAMMER_INODE_DELONDISK)) == 0) {
885 * Regardless of flushing state we cannot sync this path if the
886 * record represents a delete-on-disk but the target inode
887 * is not ready to sync its own deletion.
889 * XXX need to count effective nlinks to determine whether
890 * the flush is ok, otherwise removing a hardlink will
891 * just leave the DEL record to rot.
893 record->target_ip->flags |= HAMMER_INODE_REFLUSH;
897 if (ip->flush_group == ip->hmp->flusher_next) {
899 * This is the record we wanted to synchronize.
901 record->flush_state = HAMMER_FST_FLUSH;
902 record->flush_group = ip->flush_group;
903 hammer_ref(&record->lock);
904 if (record->type == HAMMER_MEM_RECORD_ADD)
908 * A general or delete-on-disk record does not contribute
909 * to our visibility. We can still flush it, however.
914 * We couldn't resolve the dependancies, request that the
915 * inode be flushed when the dependancies can be resolved.
917 ip->flags |= HAMMER_INODE_REFLUSH;
923 * This is the core routine placing an inode into the FST_FLUSH state.
926 hammer_flush_inode_core(hammer_inode_t ip, int flags)
931 * Set flush state and prevent the flusher from cycling into
932 * the next flush group. Do not place the ip on the list yet.
933 * Inodes not in the idle state get an extra reference.
935 KKASSERT(ip->flush_state != HAMMER_FST_FLUSH);
936 if (ip->flush_state == HAMMER_FST_IDLE)
937 hammer_ref(&ip->lock);
938 ip->flush_state = HAMMER_FST_FLUSH;
939 ip->flush_group = ip->hmp->flusher_next;
940 ++ip->hmp->flusher_lock;
943 * We need to be able to vfsync/truncate from the backend.
945 KKASSERT((ip->flags & HAMMER_INODE_VHELD) == 0);
946 if (ip->vp && (ip->vp->v_flag & VINACTIVE) == 0) {
947 ip->flags |= HAMMER_INODE_VHELD;
952 * Figure out how many in-memory records we can actually flush
953 * (not including inode meta-data, buffers, etc).
955 if (flags & HAMMER_FLUSH_RECURSION) {
958 go_count = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
959 hammer_setup_child_callback, NULL);
963 * This is a more involved test that includes go_count. If we
964 * can't flush, flag the inode and return. If go_count is 0 we
965 * were are unable to flush any records in our rec_tree and
966 * must ignore the XDIRTY flag.
969 if ((ip->flags & HAMMER_INODE_MODMASK_NOXDIRTY) == 0) {
970 ip->flags |= HAMMER_INODE_REFLUSH;
971 ip->flush_state = HAMMER_FST_SETUP;
972 if (ip->flags & HAMMER_INODE_VHELD) {
973 ip->flags &= ~HAMMER_INODE_VHELD;
976 if (flags & HAMMER_FLUSH_SIGNAL) {
977 ip->flags |= HAMMER_INODE_RESIGNAL;
978 hammer_flusher_async(ip->hmp);
980 if (--ip->hmp->flusher_lock == 0)
981 wakeup(&ip->hmp->flusher_lock);
987 * Snapshot the state of the inode for the backend flusher.
989 * The truncation must be retained in the frontend until after
990 * we've actually performed the record deletion.
992 * NOTE: The DELETING flag is a mod flag, but it is also sticky,
993 * and stays in ip->flags. Once set, it stays set until the
994 * inode is destroyed.
996 ip->sync_flags = (ip->flags & HAMMER_INODE_MODMASK);
997 ip->sync_trunc_off = ip->trunc_off;
998 ip->sync_ino_rec = ip->ino_rec;
999 ip->sync_ino_data = ip->ino_data;
1000 ip->flags &= ~HAMMER_INODE_MODMASK | HAMMER_INODE_TRUNCATED;
1003 * The flusher list inherits our inode and reference.
1005 TAILQ_INSERT_TAIL(&ip->hmp->flush_list, ip, flush_entry);
1006 if (--ip->hmp->flusher_lock == 0)
1007 wakeup(&ip->hmp->flusher_lock);
1009 if (flags & HAMMER_FLUSH_SIGNAL)
1010 hammer_flusher_async(ip->hmp);
1014 * Callback for scan of ip->rec_tree. Try to include each record in our
1015 * flush. ip->flush_group has been set but the inode has not yet been
1016 * moved into a flushing state.
1018 * If we get stuck on a record we have to set HAMMER_INODE_REFLUSH on
1021 * We return 1 for any record placed or found in FST_FLUSH, which prevents
1022 * the caller from shortcutting the flush.
1025 hammer_setup_child_callback(hammer_record_t rec, void *data)
1027 hammer_inode_t target_ip;
1032 * If the record has been deleted by the backend (it's being held
1033 * by the frontend in a race), just ignore it.
1035 if (rec->flags & HAMMER_RECF_DELETED_BE)
1039 * If the record is in an idle state it has no dependancies and
1045 switch(rec->flush_state) {
1046 case HAMMER_FST_IDLE:
1048 * Record has no setup dependancy, we can flush it.
1050 KKASSERT(rec->target_ip == NULL);
1051 rec->flush_state = HAMMER_FST_FLUSH;
1052 rec->flush_group = ip->flush_group;
1053 hammer_ref(&rec->lock);
1056 case HAMMER_FST_SETUP:
1058 * Record has a setup dependancy. Try to include the
1059 * target ip in the flush.
1061 * We have to be careful here, if we do not do the right
1062 * thing we can lose track of dirty inodes and the system
1063 * will lockup trying to allocate buffers.
1065 target_ip = rec->target_ip;
1066 KKASSERT(target_ip != NULL);
1067 KKASSERT(target_ip->flush_state != HAMMER_FST_IDLE);
1068 if (target_ip->flush_state == HAMMER_FST_FLUSH) {
1070 * If the target IP is already flushing in our group
1071 * we are golden, otherwise make sure the target
1074 if (target_ip->flush_group == ip->flush_group) {
1075 rec->flush_state = HAMMER_FST_FLUSH;
1076 rec->flush_group = ip->flush_group;
1077 hammer_ref(&rec->lock);
1080 target_ip->flags |= HAMMER_INODE_REFLUSH;
1082 } else if (rec->type == HAMMER_MEM_RECORD_ADD) {
1084 * If the target IP is not flushing we can force
1085 * it to flush, even if it is unable to write out
1086 * any of its own records we have at least one in
1087 * hand that we CAN deal with.
1089 rec->flush_state = HAMMER_FST_FLUSH;
1090 rec->flush_group = ip->flush_group;
1091 hammer_ref(&rec->lock);
1092 hammer_flush_inode_core(target_ip,
1093 HAMMER_FLUSH_RECURSION);
1097 * General or delete-on-disk record.
1099 * XXX this needs help. If a delete-on-disk we could
1100 * disconnect the target. If the target has its own
1101 * dependancies they really need to be flushed.
1105 rec->flush_state = HAMMER_FST_FLUSH;
1106 rec->flush_group = ip->flush_group;
1107 hammer_ref(&rec->lock);
1108 hammer_flush_inode_core(target_ip,
1109 HAMMER_FLUSH_RECURSION);
1113 case HAMMER_FST_FLUSH:
1115 * Record already associated with a flush group. It had
1118 KKASSERT(rec->flush_group == ip->flush_group);
1126 * Wait for a previously queued flush to complete
1129 hammer_wait_inode(hammer_inode_t ip)
1131 while (ip->flush_state != HAMMER_FST_IDLE) {
1132 ip->flags |= HAMMER_INODE_FLUSHW;
1133 tsleep(&ip->flags, 0, "hmrwin", 0);
1138 * Called by the backend code when a flush has been completed.
1139 * The inode has already been removed from the flush list.
1141 * A pipelined flush can occur, in which case we must re-enter the
1142 * inode on the list and re-copy its fields.
1145 hammer_flush_inode_done(hammer_inode_t ip)
1150 KKASSERT(ip->flush_state == HAMMER_FST_FLUSH);
1153 * Allow BIOs to queue to the inode's primary bioq again.
1155 ip->flags &= ~HAMMER_INODE_WRITE_ALT;
1158 * Merge left-over flags back into the frontend and fix the state.
1160 ip->flags |= ip->sync_flags;
1163 * The backend may have adjusted nlinks, so if the adjusted nlinks
1164 * does not match the fronttend set the frontend's RDIRTY flag again.
1166 if (ip->ino_rec.ino_nlinks != ip->sync_ino_rec.ino_nlinks)
1167 ip->flags |= HAMMER_INODE_RDIRTY;
1170 * Reflush any BIOs that wound up in the alt list. Our inode will
1171 * also wind up at the end of the flusher's list.
1173 while ((bio = TAILQ_FIRST(&ip->bio_alt_list)) != NULL) {
1174 TAILQ_REMOVE(&ip->bio_alt_list, bio, bio_act);
1175 TAILQ_INSERT_TAIL(&ip->bio_list, bio, bio_act);
1178 * Fix up the dirty buffer status.
1180 if (TAILQ_FIRST(&ip->bio_list) ||
1181 (ip->vp && RB_ROOT(&ip->vp->v_rbdirty_tree))) {
1182 ip->flags |= HAMMER_INODE_BUFS;
1186 * Re-set the XDIRTY flag if some of the inode's in-memory records
1187 * could not be flushed.
1189 if (RB_ROOT(&ip->rec_tree))
1190 ip->flags |= HAMMER_INODE_XDIRTY;
1193 * Do not lose track of inodes which no longer have vnode
1194 * assocations, otherwise they may never get flushed again.
1196 if ((ip->flags & HAMMER_INODE_MODMASK) && ip->vp == NULL)
1197 ip->flags |= HAMMER_INODE_REFLUSH;
1200 * Adjust flush_state. The target state (idle or setup) shouldn't
1201 * be terribly important since we will reflush if we really need
1202 * to do anything. XXX
1204 if (TAILQ_EMPTY(&ip->target_list) && RB_EMPTY(&ip->rec_tree)) {
1205 ip->flush_state = HAMMER_FST_IDLE;
1208 ip->flush_state = HAMMER_FST_SETUP;
1212 * Clean up the vnode ref
1214 if (ip->flags & HAMMER_INODE_VHELD) {
1215 ip->flags &= ~HAMMER_INODE_VHELD;
1220 * If the frontend made more changes and requested another flush,
1221 * then try to get it running.
1223 if (ip->flags & HAMMER_INODE_REFLUSH) {
1224 ip->flags &= ~HAMMER_INODE_REFLUSH;
1225 if (ip->flags & HAMMER_INODE_RESIGNAL) {
1226 ip->flags &= ~HAMMER_INODE_RESIGNAL;
1227 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1229 hammer_flush_inode(ip, 0);
1234 * Finally, if the frontend is waiting for a flush to complete,
1237 if (ip->flush_state != HAMMER_FST_FLUSH) {
1238 if (ip->flags & HAMMER_INODE_FLUSHW) {
1239 ip->flags &= ~HAMMER_INODE_FLUSHW;
1244 hammer_rel_inode(ip, 0);
1248 * Called from hammer_sync_inode() to synchronize in-memory records
1252 hammer_sync_record_callback(hammer_record_t record, void *data)
1254 hammer_cursor_t cursor = data;
1255 hammer_transaction_t trans = cursor->trans;
1259 * Skip records that do not belong to the current flush.
1261 if (record->flush_state != HAMMER_FST_FLUSH)
1263 KKASSERT((record->flags & HAMMER_RECF_DELETED_BE) == 0);
1265 if (record->flush_group != record->ip->flush_group) {
1266 kprintf("sync_record %p ip %p bad flush group %d %d\n", record, record->ip, record->flush_group ,record->ip->flush_group);
1271 KKASSERT(record->flush_group == record->ip->flush_group);
1274 * Interlock the record using the BE flag. Once BE is set the
1275 * frontend cannot change the state of FE.
1277 * NOTE: If FE is set prior to us setting BE we still sync the
1278 * record out, but the flush completion code converts it to
1279 * a delete-on-disk record instead of destroying it.
1281 KKASSERT((record->flags & HAMMER_RECF_INTERLOCK_BE) == 0);
1282 record->flags |= HAMMER_RECF_INTERLOCK_BE;
1285 * If DELETED_FE is set we may have already sent dependant pieces
1286 * to the disk and we must flush the record as if it hadn't been
1287 * deleted. This creates a bit of a mess because we have to
1288 * have ip_sync_record convert the record to MEM_RECORD_DEL before
1289 * it inserts the B-Tree record. Otherwise the media sync might
1290 * be visible to the frontend.
1292 if (record->flags & HAMMER_RECF_DELETED_FE) {
1293 if (record->type == HAMMER_MEM_RECORD_ADD) {
1294 record->flags |= HAMMER_RECF_CONVERT_DELETE;
1296 KKASSERT(record->type != HAMMER_MEM_RECORD_DEL);
1302 * Assign the create_tid for new records. Deletions already
1303 * have the record's entire key properly set up.
1305 if (record->type != HAMMER_MEM_RECORD_DEL)
1306 record->rec.inode.base.base.create_tid = trans->tid;
1308 error = hammer_ip_sync_record_cursor(cursor, record);
1309 if (error != EDEADLK)
1311 hammer_done_cursor(cursor);
1312 error = hammer_init_cursor(trans, cursor, &record->ip->cache[0],
1317 record->flags &= ~HAMMER_RECF_CONVERT_DELETE;
1321 if (error != -ENOSPC) {
1322 kprintf("hammer_sync_record_callback: sync failed rec "
1323 "%p, error %d\n", record, error);
1324 Debugger("sync failed rec");
1327 hammer_flush_record_done(record, error);
1332 * XXX error handling
1335 hammer_sync_inode(hammer_inode_t ip)
1337 struct hammer_transaction trans;
1338 struct hammer_cursor cursor;
1340 hammer_record_t depend;
1341 hammer_record_t next;
1342 int error, tmp_error;
1345 if ((ip->sync_flags & HAMMER_INODE_MODMASK) == 0)
1348 hammer_start_transaction_fls(&trans, ip->hmp);
1349 error = hammer_init_cursor(&trans, &cursor, &ip->cache[0], ip);
1354 * Any directory records referencing this inode which are not in
1355 * our current flush group must adjust our nlink count for the
1356 * purposes of synchronization to disk.
1358 * Records which are in our flush group can be unlinked from our
1359 * inode now, potentially allowing the inode to be physically
1362 nlinks = ip->ino_rec.ino_nlinks;
1363 next = TAILQ_FIRST(&ip->target_list);
1364 while ((depend = next) != NULL) {
1365 next = TAILQ_NEXT(depend, target_entry);
1366 if (depend->flush_state == HAMMER_FST_FLUSH &&
1367 depend->flush_group == ip->hmp->flusher_act) {
1369 * If this is an ADD that was deleted by the frontend
1370 * the frontend nlinks count will have already been
1371 * decremented, but the backend is going to sync its
1372 * directory entry and must account for it. The
1373 * record will be converted to a delete-on-disk when
1376 * If the ADD was not deleted by the frontend we
1377 * can remove the dependancy from our target_list.
1379 if (depend->flags & HAMMER_RECF_DELETED_FE) {
1382 TAILQ_REMOVE(&ip->target_list, depend,
1384 depend->target_ip = NULL;
1386 } else if ((depend->flags & HAMMER_RECF_DELETED_FE) == 0) {
1388 * Not part of our flush group
1390 KKASSERT((depend->flags & HAMMER_RECF_DELETED_BE) == 0);
1391 switch(depend->type) {
1392 case HAMMER_MEM_RECORD_ADD:
1395 case HAMMER_MEM_RECORD_DEL:
1405 * Set dirty if we had to modify the link count.
1407 if (ip->sync_ino_rec.ino_nlinks != nlinks) {
1408 KKASSERT((int64_t)nlinks >= 0);
1409 ip->sync_ino_rec.ino_nlinks = nlinks;
1410 ip->sync_flags |= HAMMER_INODE_RDIRTY;
1414 * Queue up as many dirty buffers as we can then set a flag to
1415 * cause any further BIOs to go to the alternative queue.
1417 if (ip->flags & HAMMER_INODE_VHELD)
1418 error = vfsync(ip->vp, MNT_NOWAIT, 1, NULL, NULL);
1419 ip->flags |= HAMMER_INODE_WRITE_ALT;
1422 * The buffer cache may contain dirty buffers beyond the inode
1423 * state we copied from the frontend to the backend. Because
1424 * we are syncing our buffer cache on the backend, resync
1425 * the truncation point and the file size so we don't wipe out
1428 * Syncing the buffer cache on the frontend has serious problems
1429 * because it prevents us from passively queueing dirty inodes
1430 * to the backend (the BIO's could stall indefinitely).
1432 if (ip->flags & HAMMER_INODE_TRUNCATED) {
1433 ip->sync_trunc_off = ip->trunc_off;
1434 ip->sync_flags |= HAMMER_INODE_TRUNCATED;
1436 if (ip->sync_ino_rec.ino_size != ip->ino_rec.ino_size) {
1437 ip->sync_ino_rec.ino_size = ip->ino_rec.ino_size;
1438 ip->sync_flags |= HAMMER_INODE_RDIRTY;
1442 * If there is a trunction queued destroy any data past the (aligned)
1443 * truncation point. Userland will have dealt with the buffer
1444 * containing the truncation point for us.
1446 * We don't flush pending frontend data buffers until after we've
1447 * dealth with the truncation.
1449 * Don't bother if the inode is or has been deleted.
1451 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
1453 * Interlock trunc_off. The VOP front-end may continue to
1454 * make adjustments to it while we are blocked.
1457 off_t aligned_trunc_off;
1459 trunc_off = ip->sync_trunc_off;
1460 aligned_trunc_off = (trunc_off + HAMMER_BUFMASK) &
1464 * Delete any whole blocks on-media. The front-end has
1465 * already cleaned out any partial block and made it
1466 * pending. The front-end may have updated trunc_off
1467 * while we were blocked so do not just unconditionally
1468 * set it to the maximum offset.
1470 error = hammer_ip_delete_range(&cursor, ip,
1472 0x7FFFFFFFFFFFFFFFLL);
1474 Debugger("hammer_ip_delete_range errored");
1475 ip->sync_flags &= ~HAMMER_INODE_TRUNCATED;
1476 if (ip->trunc_off >= trunc_off) {
1477 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
1478 ip->flags &= ~HAMMER_INODE_TRUNCATED;
1485 * Now sync related records. These will typically be directory
1486 * entries or delete-on-disk records.
1488 * Not all records will be flushed, but clear XDIRTY anyway. We
1489 * will set it again in the frontend hammer_flush_inode_done()
1490 * if records remain.
1493 tmp_error = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
1494 hammer_sync_record_callback, &cursor);
1500 ip->sync_flags &= ~HAMMER_INODE_XDIRTY;
1504 * If we are deleting the inode the frontend had better not have
1505 * any active references on elements making up the inode.
1507 if (error == 0 && ip->sync_ino_rec.ino_nlinks == 0 &&
1508 RB_EMPTY(&ip->rec_tree) &&
1509 (ip->sync_flags & HAMMER_INODE_DELETING) &&
1510 (ip->flags & HAMMER_INODE_DELETED) == 0) {
1514 ip->flags |= HAMMER_INODE_DELETED;
1515 error = hammer_ip_delete_range_all(&cursor, ip, &count1);
1517 ip->sync_flags &= ~HAMMER_INODE_DELETING;
1518 ip->sync_flags &= ~HAMMER_INODE_TRUNCATED;
1519 KKASSERT(RB_EMPTY(&ip->rec_tree));
1522 * Set delete_tid in both the frontend and backend
1523 * copy of the inode record. The DELETED flag handles
1524 * this, do not set RDIRTY.
1526 ip->ino_rec.base.base.delete_tid = trans.tid;
1527 ip->sync_ino_rec.base.base.delete_tid = trans.tid;
1530 * Adjust the inode count in the volume header
1532 hammer_modify_volume_field(&trans, trans.rootvol,
1534 --ip->hmp->rootvol->ondisk->vol0_stat_inodes;
1535 hammer_modify_volume_done(trans.rootvol);
1537 ip->flags &= ~HAMMER_INODE_DELETED;
1538 Debugger("hammer_ip_delete_range_all errored");
1543 * Flush any queued BIOs. These will just biodone() the IO's if
1544 * the inode has been deleted.
1546 while ((bio = TAILQ_FIRST(&ip->bio_list)) != NULL) {
1547 TAILQ_REMOVE(&ip->bio_list, bio, bio_act);
1548 tmp_error = hammer_dowrite(&cursor, ip, bio);
1552 ip->sync_flags &= ~HAMMER_INODE_BUFS;
1555 Debugger("RB_SCAN errored");
1558 * Now update the inode's on-disk inode-data and/or on-disk record.
1559 * DELETED and ONDISK are managed only in ip->flags.
1561 switch(ip->flags & (HAMMER_INODE_DELETED | HAMMER_INODE_ONDISK)) {
1562 case HAMMER_INODE_DELETED|HAMMER_INODE_ONDISK:
1564 * If deleted and on-disk, don't set any additional flags.
1565 * the delete flag takes care of things.
1567 * Clear flags which may have been set by the frontend.
1569 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
1570 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1571 HAMMER_INODE_DELETING);
1573 case HAMMER_INODE_DELETED:
1575 * Take care of the case where a deleted inode was never
1576 * flushed to the disk in the first place.
1578 * Clear flags which may have been set by the frontend.
1580 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
1581 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1582 HAMMER_INODE_DELETING);
1583 while (RB_ROOT(&ip->rec_tree)) {
1584 hammer_record_t record = RB_ROOT(&ip->rec_tree);
1585 hammer_ref(&record->lock);
1586 KKASSERT(record->lock.refs == 1);
1587 record->flags |= HAMMER_RECF_DELETED_FE;
1588 record->flags |= HAMMER_RECF_DELETED_BE;
1589 hammer_rel_mem_record(record);
1592 case HAMMER_INODE_ONDISK:
1594 * If already on-disk, do not set any additional flags.
1599 * If not on-disk and not deleted, set both dirty flags
1600 * to force an initial record to be written. Also set
1601 * the create_tid for the inode.
1603 * Set create_tid in both the frontend and backend
1604 * copy of the inode record.
1606 ip->ino_rec.base.base.create_tid = trans.tid;
1607 ip->sync_ino_rec.base.base.create_tid = trans.tid;
1608 ip->sync_flags |= HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY;
1613 * If RDIRTY or DDIRTY is set, write out a new record. If the inode
1614 * is already on-disk the old record is marked as deleted.
1616 * If DELETED is set hammer_update_inode() will delete the existing
1617 * record without writing out a new one.
1619 * If *ONLY* the ITIMES flag is set we can update the record in-place.
1621 if (ip->flags & HAMMER_INODE_DELETED) {
1622 error = hammer_update_inode(&cursor, ip);
1624 if ((ip->sync_flags & (HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY |
1625 HAMMER_INODE_ITIMES)) == HAMMER_INODE_ITIMES) {
1626 error = hammer_update_itimes(&cursor, ip);
1628 if (ip->sync_flags & (HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY |
1629 HAMMER_INODE_ITIMES)) {
1630 error = hammer_update_inode(&cursor, ip);
1633 Debugger("hammer_update_itimes/inode errored");
1636 * Save the TID we used to sync the inode with to make sure we
1637 * do not improperly reuse it.
1639 hammer_done_cursor(&cursor);
1640 hammer_done_transaction(&trans);
1645 * This routine is called when the OS is no longer actively referencing
1646 * the inode (but might still be keeping it cached), or when releasing
1647 * the last reference to an inode.
1649 * At this point if the inode's nlinks count is zero we want to destroy
1650 * it, which may mean destroying it on-media too.
1653 hammer_inode_unloadable_check(hammer_inode_t ip, int getvp)
1658 * Set the DELETING flag when the link count drops to 0 and the
1659 * OS no longer has any opens on the inode.
1661 * The backend will clear DELETING (a mod flag) and set DELETED
1662 * (a state flag) when it is actually able to perform the
1665 if (ip->ino_rec.ino_nlinks == 0 &&
1666 (ip->flags & (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) == 0) {
1667 ip->flags |= HAMMER_INODE_DELETING;
1668 ip->flags |= HAMMER_INODE_TRUNCATED;
1672 if (hammer_get_vnode(ip, &vp) != 0)
1676 vtruncbuf(ip->vp, 0, HAMMER_BUFSIZE);
1677 vnode_pager_setsize(ip->vp, 0);
1686 * Re-test an inode when a dependancy had gone away to see if we
1687 * can chain flush it.
1690 hammer_test_inode(hammer_inode_t ip)
1692 if (ip->flags & HAMMER_INODE_REFLUSH) {
1693 ip->flags &= ~HAMMER_INODE_REFLUSH;
1694 hammer_ref(&ip->lock);
1695 if (ip->flags & HAMMER_INODE_RESIGNAL) {
1696 ip->flags &= ~HAMMER_INODE_RESIGNAL;
1697 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1699 hammer_flush_inode(ip, 0);
1701 hammer_rel_inode(ip, 0);