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 1.59 2008/05/13 20:46:55 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 * Do not queue the inode to the flusher if we still have visibility,
72 * otherwise namespace calls such as chmod will unnecessarily generate
73 * multiple inode updates.
75 hammer_inode_unloadable_check(ip, 0);
76 if (ip->ino_data.nlinks == 0) {
77 if (ip->flags & HAMMER_INODE_MODMASK)
78 hammer_flush_inode(ip, 0);
86 * Release the vnode association. This is typically (but not always)
87 * the last reference on the inode.
89 * Once the association is lost we are on our own with regards to
93 hammer_vop_reclaim(struct vop_reclaim_args *ap)
95 struct hammer_inode *ip;
100 if ((ip = vp->v_data) != NULL) {
103 hammer_rel_inode(ip, 1);
109 * Return a locked vnode for the specified inode. The inode must be
110 * referenced but NOT LOCKED on entry and will remain referenced on
113 * Called from the frontend.
116 hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp)
122 if ((vp = ip->vp) == NULL) {
123 error = getnewvnode(VT_HAMMER, ip->hmp->mp, vpp, 0, 0);
126 hammer_lock_ex(&ip->lock);
127 if (ip->vp != NULL) {
128 hammer_unlock(&ip->lock);
133 hammer_ref(&ip->lock);
137 hammer_get_vnode_type(ip->ino_data.obj_type);
139 switch(ip->ino_data.obj_type) {
140 case HAMMER_OBJTYPE_CDEV:
141 case HAMMER_OBJTYPE_BDEV:
142 vp->v_ops = &ip->hmp->mp->mnt_vn_spec_ops;
143 addaliasu(vp, ip->ino_data.rmajor,
144 ip->ino_data.rminor);
146 case HAMMER_OBJTYPE_FIFO:
147 vp->v_ops = &ip->hmp->mp->mnt_vn_fifo_ops;
154 * Only mark as the root vnode if the ip is not
155 * historical, otherwise the VFS cache will get
156 * confused. The other half of the special handling
157 * is in hammer_vop_nlookupdotdot().
159 if (ip->obj_id == HAMMER_OBJID_ROOT &&
160 ip->obj_asof == ip->hmp->asof) {
164 vp->v_data = (void *)ip;
165 /* vnode locked by getnewvnode() */
166 /* make related vnode dirty if inode dirty? */
167 hammer_unlock(&ip->lock);
168 if (vp->v_type == VREG)
169 vinitvmio(vp, ip->ino_data.size);
174 * loop if the vget fails (aka races), or if the vp
175 * no longer matches ip->vp.
177 if (vget(vp, LK_EXCLUSIVE) == 0) {
188 * Acquire a HAMMER inode. The returned inode is not locked. These functions
189 * do not attach or detach the related vnode (use hammer_get_vnode() for
192 * The flags argument is only applied for newly created inodes, and only
193 * certain flags are inherited.
195 * Called from the frontend.
197 struct hammer_inode *
198 hammer_get_inode(hammer_transaction_t trans, struct hammer_node **cache,
199 u_int64_t obj_id, hammer_tid_t asof, int flags, int *errorp)
201 hammer_mount_t hmp = trans->hmp;
202 struct hammer_inode_info iinfo;
203 struct hammer_cursor cursor;
204 struct hammer_inode *ip;
207 * Determine if we already have an inode cached. If we do then
210 iinfo.obj_id = obj_id;
211 iinfo.obj_asof = asof;
213 ip = hammer_ino_rb_tree_RB_LOOKUP_INFO(&hmp->rb_inos_root, &iinfo);
215 hammer_ref(&ip->lock);
220 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
221 ++hammer_count_inodes;
223 ip->obj_asof = iinfo.obj_asof;
225 ip->flags = flags & HAMMER_INODE_RO;
227 ip->flags |= HAMMER_INODE_RO;
228 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
229 RB_INIT(&ip->rec_tree);
230 TAILQ_INIT(&ip->bio_list);
231 TAILQ_INIT(&ip->bio_alt_list);
232 TAILQ_INIT(&ip->target_list);
235 * Locate the on-disk inode.
238 hammer_init_cursor(trans, &cursor, cache, NULL);
239 cursor.key_beg.obj_id = ip->obj_id;
240 cursor.key_beg.key = 0;
241 cursor.key_beg.create_tid = 0;
242 cursor.key_beg.delete_tid = 0;
243 cursor.key_beg.rec_type = HAMMER_RECTYPE_INODE;
244 cursor.key_beg.obj_type = 0;
245 cursor.asof = iinfo.obj_asof;
246 cursor.flags = HAMMER_CURSOR_GET_LEAF | HAMMER_CURSOR_GET_DATA |
249 *errorp = hammer_btree_lookup(&cursor);
250 if (*errorp == EDEADLK) {
251 hammer_done_cursor(&cursor);
256 * On success the B-Tree lookup will hold the appropriate
257 * buffer cache buffers and provide a pointer to the requested
258 * information. Copy the information to the in-memory inode
259 * and cache the B-Tree node to improve future operations.
262 ip->ino_leaf = cursor.node->ondisk->elms[cursor.index].leaf;
263 ip->ino_data = cursor.data->inode;
264 hammer_cache_node(cursor.node, &ip->cache[0]);
266 hammer_cache_node(cursor.node, cache);
270 * On success load the inode's record and data and insert the
271 * inode into the B-Tree. It is possible to race another lookup
272 * insertion of the same inode so deal with that condition too.
274 * The cursor's locked node interlocks against others creating and
275 * destroying ip while we were blocked.
278 hammer_ref(&ip->lock);
279 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
280 hammer_uncache_node(&ip->cache[0]);
281 hammer_uncache_node(&ip->cache[1]);
282 KKASSERT(ip->lock.refs == 1);
283 --hammer_count_inodes;
285 hammer_done_cursor(&cursor);
288 ip->flags |= HAMMER_INODE_ONDISK;
291 * Do not panic on read-only accesses which fail, particularly
292 * historical accesses where the snapshot might not have
293 * complete connectivity.
295 if ((flags & HAMMER_INODE_RO) == 0) {
296 kprintf("hammer_get_inode: failed ip %p obj_id %016llx cursor %p error %d\n",
297 ip, ip->obj_id, &cursor, *errorp);
300 --hammer_count_inodes;
304 hammer_done_cursor(&cursor);
309 * Create a new filesystem object, returning the inode in *ipp. The
310 * returned inode will be referenced.
312 * The inode is created in-memory.
315 hammer_create_inode(hammer_transaction_t trans, struct vattr *vap,
316 struct ucred *cred, hammer_inode_t dip,
317 struct hammer_inode **ipp)
324 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
325 ++hammer_count_inodes;
326 ip->obj_id = hammer_alloc_objid(trans, dip);
327 KKASSERT(ip->obj_id != 0);
328 ip->obj_asof = hmp->asof;
330 ip->flush_state = HAMMER_FST_IDLE;
331 ip->flags = HAMMER_INODE_DDIRTY | HAMMER_INODE_ITIMES;
333 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
334 RB_INIT(&ip->rec_tree);
335 TAILQ_INIT(&ip->bio_list);
336 TAILQ_INIT(&ip->bio_alt_list);
337 TAILQ_INIT(&ip->target_list);
339 ip->ino_leaf.atime = trans->time;
340 ip->ino_data.mtime = trans->time;
341 ip->ino_data.size = 0;
342 ip->ino_data.nlinks = 0;
344 ip->ino_leaf.base.btype = HAMMER_BTREE_TYPE_RECORD;
345 ip->ino_leaf.base.obj_id = ip->obj_id;
346 ip->ino_leaf.base.key = 0;
347 ip->ino_leaf.base.create_tid = 0;
348 ip->ino_leaf.base.delete_tid = 0;
349 ip->ino_leaf.base.rec_type = HAMMER_RECTYPE_INODE;
350 ip->ino_leaf.base.obj_type = hammer_get_obj_type(vap->va_type);
352 ip->ino_data.obj_type = ip->ino_leaf.base.obj_type;
353 ip->ino_data.version = HAMMER_INODE_DATA_VERSION;
354 ip->ino_data.mode = vap->va_mode;
355 ip->ino_data.ctime = trans->time;
356 ip->ino_data.parent_obj_id = (dip) ? dip->ino_leaf.base.obj_id : 0;
358 switch(ip->ino_leaf.base.obj_type) {
359 case HAMMER_OBJTYPE_CDEV:
360 case HAMMER_OBJTYPE_BDEV:
361 ip->ino_data.rmajor = vap->va_rmajor;
362 ip->ino_data.rminor = vap->va_rminor;
369 * Calculate default uid/gid and overwrite with information from
372 xuid = hammer_to_unix_xid(&dip->ino_data.uid);
373 ip->ino_data.gid = dip->ino_data.gid;
374 xuid = vop_helper_create_uid(hmp->mp, dip->ino_data.mode, xuid, cred,
376 ip->ino_data.mode = vap->va_mode;
378 if (vap->va_vaflags & VA_UID_UUID_VALID)
379 ip->ino_data.uid = vap->va_uid_uuid;
380 else if (vap->va_uid != (uid_t)VNOVAL)
381 hammer_guid_to_uuid(&ip->ino_data.uid, xuid);
382 if (vap->va_vaflags & VA_GID_UUID_VALID)
383 ip->ino_data.gid = vap->va_gid_uuid;
384 else if (vap->va_gid != (gid_t)VNOVAL)
385 hammer_guid_to_uuid(&ip->ino_data.gid, vap->va_gid);
387 hammer_ref(&ip->lock);
388 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
389 hammer_unref(&ip->lock);
390 panic("hammer_create_inode: duplicate obj_id %llx", ip->obj_id);
397 * Called by hammer_sync_inode().
400 hammer_update_inode(hammer_cursor_t cursor, hammer_inode_t ip)
402 hammer_transaction_t trans = cursor->trans;
403 hammer_record_t record;
410 * If the inode has a presence on-disk then locate it and mark
411 * it deleted, setting DELONDISK.
413 * The record may or may not be physically deleted, depending on
414 * the retention policy.
416 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
417 HAMMER_INODE_ONDISK) {
418 hammer_normalize_cursor(cursor);
419 cursor->key_beg.obj_id = ip->obj_id;
420 cursor->key_beg.key = 0;
421 cursor->key_beg.create_tid = 0;
422 cursor->key_beg.delete_tid = 0;
423 cursor->key_beg.rec_type = HAMMER_RECTYPE_INODE;
424 cursor->key_beg.obj_type = 0;
425 cursor->asof = ip->obj_asof;
426 cursor->flags &= ~HAMMER_CURSOR_INITMASK;
427 cursor->flags |= HAMMER_CURSOR_GET_LEAF | HAMMER_CURSOR_ASOF;
428 cursor->flags |= HAMMER_CURSOR_BACKEND;
430 error = hammer_btree_lookup(cursor);
431 if (hammer_debug_inode)
432 kprintf("IPDEL %p %08x %d", ip, ip->flags, error);
434 kprintf("error %d\n", error);
435 Debugger("hammer_update_inode");
439 error = hammer_ip_delete_record(cursor, trans->tid);
440 if (hammer_debug_inode)
441 kprintf(" error %d\n", error);
442 if (error && error != EDEADLK) {
443 kprintf("error %d\n", error);
444 Debugger("hammer_update_inode2");
447 ip->flags |= HAMMER_INODE_DELONDISK;
450 hammer_cache_node(cursor->node, &ip->cache[0]);
452 if (error == EDEADLK) {
453 hammer_done_cursor(cursor);
454 error = hammer_init_cursor(trans, cursor,
456 if (hammer_debug_inode)
457 kprintf("IPDED %p %d\n", ip, error);
464 * Ok, write out the initial record or a new record (after deleting
465 * the old one), unless the DELETED flag is set. This routine will
466 * clear DELONDISK if it writes out a record.
468 * Update our inode statistics if this is the first application of
471 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED) == 0) {
473 * Generate a record and write it to the media
475 record = hammer_alloc_mem_record(ip, 0);
476 record->type = HAMMER_MEM_RECORD_INODE;
477 record->flush_state = HAMMER_FST_FLUSH;
478 record->leaf = ip->sync_ino_leaf;
479 record->leaf.base.create_tid = trans->tid;
480 record->leaf.data_len = sizeof(ip->sync_ino_data);
481 record->data = (void *)&ip->sync_ino_data;
482 record->flags |= HAMMER_RECF_INTERLOCK_BE;
484 error = hammer_ip_sync_record_cursor(cursor, record);
485 if (hammer_debug_inode)
486 kprintf("GENREC %p rec %08x %d\n",
487 ip, record->flags, error);
488 if (error != EDEADLK)
490 hammer_done_cursor(cursor);
491 error = hammer_init_cursor(trans, cursor,
493 if (hammer_debug_inode)
494 kprintf("GENREC reinit %d\n", error);
499 kprintf("error %d\n", error);
500 Debugger("hammer_update_inode3");
504 * The record isn't managed by the inode's record tree,
505 * destroy it whether we succeed or fail.
507 record->flags &= ~HAMMER_RECF_INTERLOCK_BE;
508 record->flags |= HAMMER_RECF_DELETED_FE;
509 record->flush_state = HAMMER_FST_IDLE;
510 hammer_rel_mem_record(record);
516 if (hammer_debug_inode)
517 kprintf("CLEANDELOND %p %08x\n", ip, ip->flags);
518 ip->sync_flags &= ~(HAMMER_INODE_DDIRTY |
519 HAMMER_INODE_ITIMES);
520 ip->flags &= ~HAMMER_INODE_DELONDISK;
523 * Root volume count of inodes
525 if ((ip->flags & HAMMER_INODE_ONDISK) == 0) {
526 hammer_modify_volume_field(trans,
529 ++ip->hmp->rootvol->ondisk->vol0_stat_inodes;
530 hammer_modify_volume_done(trans->rootvol);
531 ip->flags |= HAMMER_INODE_ONDISK;
532 if (hammer_debug_inode)
533 kprintf("NOWONDISK %p\n", ip);
539 * If the inode has been destroyed, clean out any left-over flags
540 * that may have been set by the frontend.
542 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED)) {
543 ip->sync_flags &= ~(HAMMER_INODE_DDIRTY |
544 HAMMER_INODE_ITIMES);
550 * Update only the itimes fields. This is done no-historically. The
551 * record is updated in-place on the disk.
554 hammer_update_itimes(hammer_cursor_t cursor, hammer_inode_t ip)
556 hammer_transaction_t trans = cursor->trans;
557 struct hammer_btree_leaf_elm *leaf;
562 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
563 HAMMER_INODE_ONDISK) {
564 hammer_normalize_cursor(cursor);
565 cursor->key_beg.obj_id = ip->obj_id;
566 cursor->key_beg.key = 0;
567 cursor->key_beg.create_tid = 0;
568 cursor->key_beg.delete_tid = 0;
569 cursor->key_beg.rec_type = HAMMER_RECTYPE_INODE;
570 cursor->key_beg.obj_type = 0;
571 cursor->asof = ip->obj_asof;
572 cursor->flags &= ~HAMMER_CURSOR_INITMASK;
573 cursor->flags |= HAMMER_CURSOR_GET_LEAF | HAMMER_CURSOR_ASOF;
574 cursor->flags |= HAMMER_CURSOR_BACKEND;
576 error = hammer_btree_lookup(cursor);
578 kprintf("error %d\n", error);
579 Debugger("hammer_update_itimes1");
583 * Do not generate UNDO records for atime updates.
586 hammer_modify_node(trans, cursor->node,
587 &leaf->atime, sizeof(leaf->atime));
588 leaf->atime = ip->sync_ino_leaf.atime;
589 hammer_modify_node_done(cursor->node);
590 /*rec->ino_mtime = ip->sync_ino_rec.ino_mtime;*/
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->lock.lockcount == 0);
677 KKASSERT((ip->flags & HAMMER_INODE_MODMASK) == 0);
679 KKASSERT(RB_EMPTY(&ip->rec_tree));
680 KKASSERT(TAILQ_EMPTY(&ip->target_list));
681 KKASSERT(TAILQ_EMPTY(&ip->bio_list));
682 KKASSERT(TAILQ_EMPTY(&ip->bio_alt_list));
684 RB_REMOVE(hammer_ino_rb_tree, &ip->hmp->rb_inos_root, ip);
686 hammer_uncache_node(&ip->cache[0]);
687 hammer_uncache_node(&ip->cache[1]);
689 hammer_clear_objid(ip);
690 --hammer_count_inodes;
697 * A transaction has modified an inode, requiring updates as specified by
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_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_leaf = ip->ino_leaf;
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_data.nlinks != ip->sync_ino_data.nlinks)
1167 ip->flags |= HAMMER_INODE_DDIRTY;
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 the whole inode is being deleting all on-disk records will
1286 * be deleted very soon, we can't sync any new records to disk
1287 * because they will be deleted in the same transaction they were
1288 * created in (delete_tid == create_tid), which will assert.
1290 * XXX There may be a case with RECORD_ADD with DELETED_FE set
1291 * that we currently panic on.
1293 if (record->ip->sync_flags & HAMMER_INODE_DELETING) {
1294 switch(record->type) {
1295 case HAMMER_MEM_RECORD_GENERAL:
1296 record->flags |= HAMMER_RECF_DELETED_FE;
1297 record->flags |= HAMMER_RECF_DELETED_BE;
1300 case HAMMER_MEM_RECORD_ADD:
1301 panic("hammer_sync_record_callback: illegal add "
1302 "during inode deletion record %p", record);
1303 break; /* NOT REACHED */
1304 case HAMMER_MEM_RECORD_INODE:
1305 panic("hammer_sync_record_callback: attempt to "
1306 "sync inode record %p?", record);
1307 break; /* NOT REACHED */
1308 case HAMMER_MEM_RECORD_DEL:
1310 * Follow through and issue the on-disk deletion
1317 * If DELETED_FE is set we may have already sent dependant pieces
1318 * to the disk and we must flush the record as if it hadn't been
1319 * deleted. This creates a bit of a mess because we have to
1320 * have ip_sync_record convert the record to MEM_RECORD_DEL before
1321 * it inserts the B-Tree record. Otherwise the media sync might
1322 * be visible to the frontend.
1324 if (record->flags & HAMMER_RECF_DELETED_FE) {
1325 if (record->type == HAMMER_MEM_RECORD_ADD) {
1326 record->flags |= HAMMER_RECF_CONVERT_DELETE;
1328 KKASSERT(record->type != HAMMER_MEM_RECORD_DEL);
1334 * Assign the create_tid for new records. Deletions already
1335 * have the record's entire key properly set up.
1337 if (record->type != HAMMER_MEM_RECORD_DEL)
1338 record->leaf.base.create_tid = trans->tid;
1340 error = hammer_ip_sync_record_cursor(cursor, record);
1341 if (error != EDEADLK)
1343 hammer_done_cursor(cursor);
1344 error = hammer_init_cursor(trans, cursor, &record->ip->cache[0],
1349 record->flags &= ~HAMMER_RECF_CONVERT_DELETE;
1353 if (error != -ENOSPC) {
1354 kprintf("hammer_sync_record_callback: sync failed rec "
1355 "%p, error %d\n", record, error);
1356 Debugger("sync failed rec");
1360 hammer_flush_record_done(record, error);
1365 * XXX error handling
1368 hammer_sync_inode(hammer_inode_t ip)
1370 struct hammer_transaction trans;
1371 struct hammer_cursor cursor;
1373 hammer_record_t depend;
1374 hammer_record_t next;
1375 int error, tmp_error;
1378 if ((ip->sync_flags & HAMMER_INODE_MODMASK) == 0)
1381 hammer_start_transaction_fls(&trans, ip->hmp);
1382 error = hammer_init_cursor(&trans, &cursor, &ip->cache[0], ip);
1387 * Any directory records referencing this inode which are not in
1388 * our current flush group must adjust our nlink count for the
1389 * purposes of synchronization to disk.
1391 * Records which are in our flush group can be unlinked from our
1392 * inode now, potentially allowing the inode to be physically
1395 nlinks = ip->ino_data.nlinks;
1396 next = TAILQ_FIRST(&ip->target_list);
1397 while ((depend = next) != NULL) {
1398 next = TAILQ_NEXT(depend, target_entry);
1399 if (depend->flush_state == HAMMER_FST_FLUSH &&
1400 depend->flush_group == ip->hmp->flusher_act) {
1402 * If this is an ADD that was deleted by the frontend
1403 * the frontend nlinks count will have already been
1404 * decremented, but the backend is going to sync its
1405 * directory entry and must account for it. The
1406 * record will be converted to a delete-on-disk when
1409 * If the ADD was not deleted by the frontend we
1410 * can remove the dependancy from our target_list.
1412 if (depend->flags & HAMMER_RECF_DELETED_FE) {
1415 TAILQ_REMOVE(&ip->target_list, depend,
1417 depend->target_ip = NULL;
1419 } else if ((depend->flags & HAMMER_RECF_DELETED_FE) == 0) {
1421 * Not part of our flush group
1423 KKASSERT((depend->flags & HAMMER_RECF_DELETED_BE) == 0);
1424 switch(depend->type) {
1425 case HAMMER_MEM_RECORD_ADD:
1428 case HAMMER_MEM_RECORD_DEL:
1438 * Set dirty if we had to modify the link count.
1440 if (ip->sync_ino_data.nlinks != nlinks) {
1441 KKASSERT((int64_t)nlinks >= 0);
1442 ip->sync_ino_data.nlinks = nlinks;
1443 ip->sync_flags |= HAMMER_INODE_DDIRTY;
1447 * Queue up as many dirty buffers as we can then set a flag to
1448 * cause any further BIOs to go to the alternative queue.
1450 if (ip->flags & HAMMER_INODE_VHELD)
1451 error = vfsync(ip->vp, MNT_NOWAIT, 1, NULL, NULL);
1452 ip->flags |= HAMMER_INODE_WRITE_ALT;
1455 * The buffer cache may contain dirty buffers beyond the inode
1456 * state we copied from the frontend to the backend. Because
1457 * we are syncing our buffer cache on the backend, resync
1458 * the truncation point and the file size so we don't wipe out
1461 * Syncing the buffer cache on the frontend has serious problems
1462 * because it prevents us from passively queueing dirty inodes
1463 * to the backend (the BIO's could stall indefinitely).
1465 if (ip->flags & HAMMER_INODE_TRUNCATED) {
1466 ip->sync_trunc_off = ip->trunc_off;
1467 ip->sync_flags |= HAMMER_INODE_TRUNCATED;
1469 if (ip->sync_ino_data.size != ip->ino_data.size) {
1470 ip->sync_ino_data.size = ip->ino_data.size;
1471 ip->sync_flags |= HAMMER_INODE_DDIRTY;
1475 * If there is a trunction queued destroy any data past the (aligned)
1476 * truncation point. Userland will have dealt with the buffer
1477 * containing the truncation point for us.
1479 * We don't flush pending frontend data buffers until after we've
1480 * dealth with the truncation.
1482 * Don't bother if the inode is or has been deleted.
1484 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
1486 * Interlock trunc_off. The VOP front-end may continue to
1487 * make adjustments to it while we are blocked.
1490 off_t aligned_trunc_off;
1492 trunc_off = ip->sync_trunc_off;
1493 aligned_trunc_off = (trunc_off + HAMMER_BUFMASK) &
1497 * Delete any whole blocks on-media. The front-end has
1498 * already cleaned out any partial block and made it
1499 * pending. The front-end may have updated trunc_off
1500 * while we were blocked so do not just unconditionally
1501 * set it to the maximum offset.
1503 error = hammer_ip_delete_range(&cursor, ip,
1505 0x7FFFFFFFFFFFFFFFLL);
1507 Debugger("hammer_ip_delete_range errored");
1508 ip->sync_flags &= ~HAMMER_INODE_TRUNCATED;
1509 if (ip->trunc_off >= trunc_off) {
1510 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
1511 ip->flags &= ~HAMMER_INODE_TRUNCATED;
1518 * Now sync related records. These will typically be directory
1519 * entries or delete-on-disk records.
1521 * Not all records will be flushed, but clear XDIRTY anyway. We
1522 * will set it again in the frontend hammer_flush_inode_done()
1523 * if records remain.
1526 tmp_error = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
1527 hammer_sync_record_callback, &cursor);
1532 if (RB_EMPTY(&ip->rec_tree))
1533 ip->sync_flags &= ~HAMMER_INODE_XDIRTY;
1537 * If we are deleting the inode the frontend had better not have
1538 * any active references on elements making up the inode.
1540 if (error == 0 && ip->sync_ino_data.nlinks == 0 &&
1541 RB_EMPTY(&ip->rec_tree) &&
1542 (ip->sync_flags & HAMMER_INODE_DELETING) &&
1543 (ip->flags & HAMMER_INODE_DELETED) == 0) {
1547 ip->flags |= HAMMER_INODE_DELETED;
1548 error = hammer_ip_delete_range_all(&cursor, ip, &count1);
1550 ip->sync_flags &= ~HAMMER_INODE_DELETING;
1551 ip->sync_flags &= ~HAMMER_INODE_TRUNCATED;
1552 KKASSERT(RB_EMPTY(&ip->rec_tree));
1555 * Set delete_tid in both the frontend and backend
1556 * copy of the inode record. The DELETED flag handles
1557 * this, do not set RDIRTY.
1559 ip->ino_leaf.base.delete_tid = trans.tid;
1560 ip->sync_ino_leaf.base.delete_tid = trans.tid;
1563 * Adjust the inode count in the volume header
1565 if (ip->flags & HAMMER_INODE_ONDISK) {
1566 hammer_modify_volume_field(&trans,
1569 --ip->hmp->rootvol->ondisk->vol0_stat_inodes;
1570 hammer_modify_volume_done(trans.rootvol);
1573 ip->flags &= ~HAMMER_INODE_DELETED;
1574 Debugger("hammer_ip_delete_range_all errored");
1579 * Flush any queued BIOs. These will just biodone() the IO's if
1580 * the inode has been deleted.
1582 while ((bio = TAILQ_FIRST(&ip->bio_list)) != NULL) {
1583 TAILQ_REMOVE(&ip->bio_list, bio, bio_act);
1584 tmp_error = hammer_dowrite(&cursor, ip, bio);
1588 ip->sync_flags &= ~HAMMER_INODE_BUFS;
1591 Debugger("RB_SCAN errored");
1594 * Now update the inode's on-disk inode-data and/or on-disk record.
1595 * DELETED and ONDISK are managed only in ip->flags.
1597 switch(ip->flags & (HAMMER_INODE_DELETED | HAMMER_INODE_ONDISK)) {
1598 case HAMMER_INODE_DELETED|HAMMER_INODE_ONDISK:
1600 * If deleted and on-disk, don't set any additional flags.
1601 * the delete flag takes care of things.
1603 * Clear flags which may have been set by the frontend.
1605 ip->sync_flags &= ~(HAMMER_INODE_DDIRTY|
1606 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1607 HAMMER_INODE_DELETING);
1609 case HAMMER_INODE_DELETED:
1611 * Take care of the case where a deleted inode was never
1612 * flushed to the disk in the first place.
1614 * Clear flags which may have been set by the frontend.
1616 ip->sync_flags &= ~(HAMMER_INODE_DDIRTY|
1617 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1618 HAMMER_INODE_DELETING);
1619 while (RB_ROOT(&ip->rec_tree)) {
1620 hammer_record_t record = RB_ROOT(&ip->rec_tree);
1621 hammer_ref(&record->lock);
1622 KKASSERT(record->lock.refs == 1);
1623 record->flags |= HAMMER_RECF_DELETED_FE;
1624 record->flags |= HAMMER_RECF_DELETED_BE;
1625 hammer_rel_mem_record(record);
1628 case HAMMER_INODE_ONDISK:
1630 * If already on-disk, do not set any additional flags.
1635 * If not on-disk and not deleted, set both dirty flags
1636 * to force an initial record to be written. Also set
1637 * the create_tid for the inode.
1639 * Set create_tid in both the frontend and backend
1640 * copy of the inode record.
1642 ip->ino_leaf.base.create_tid = trans.tid;
1643 ip->sync_ino_leaf.base.create_tid = trans.tid;
1644 ip->sync_flags |= HAMMER_INODE_DDIRTY;
1649 * If RDIRTY or DDIRTY is set, write out a new record. If the inode
1650 * is already on-disk the old record is marked as deleted.
1652 * If DELETED is set hammer_update_inode() will delete the existing
1653 * record without writing out a new one.
1655 * If *ONLY* the ITIMES flag is set we can update the record in-place.
1657 if (ip->flags & HAMMER_INODE_DELETED) {
1658 error = hammer_update_inode(&cursor, ip);
1660 if ((ip->sync_flags & (HAMMER_INODE_DDIRTY | HAMMER_INODE_ITIMES)) ==
1661 HAMMER_INODE_ITIMES) {
1662 error = hammer_update_itimes(&cursor, ip);
1664 if (ip->sync_flags & (HAMMER_INODE_DDIRTY | HAMMER_INODE_ITIMES)) {
1665 error = hammer_update_inode(&cursor, ip);
1668 Debugger("hammer_update_itimes/inode errored");
1671 * Save the TID we used to sync the inode with to make sure we
1672 * do not improperly reuse it.
1674 hammer_done_cursor(&cursor);
1675 hammer_done_transaction(&trans);
1680 * This routine is called when the OS is no longer actively referencing
1681 * the inode (but might still be keeping it cached), or when releasing
1682 * the last reference to an inode.
1684 * At this point if the inode's nlinks count is zero we want to destroy
1685 * it, which may mean destroying it on-media too.
1688 hammer_inode_unloadable_check(hammer_inode_t ip, int getvp)
1693 * Set the DELETING flag when the link count drops to 0 and the
1694 * OS no longer has any opens on the inode.
1696 * The backend will clear DELETING (a mod flag) and set DELETED
1697 * (a state flag) when it is actually able to perform the
1700 if (ip->ino_data.nlinks == 0 &&
1701 (ip->flags & (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) == 0) {
1702 ip->flags |= HAMMER_INODE_DELETING;
1703 ip->flags |= HAMMER_INODE_TRUNCATED;
1707 if (hammer_get_vnode(ip, &vp) != 0)
1711 vtruncbuf(ip->vp, 0, HAMMER_BUFSIZE);
1712 vnode_pager_setsize(ip->vp, 0);
1721 * Re-test an inode when a dependancy had gone away to see if we
1722 * can chain flush it.
1725 hammer_test_inode(hammer_inode_t ip)
1727 if (ip->flags & HAMMER_INODE_REFLUSH) {
1728 ip->flags &= ~HAMMER_INODE_REFLUSH;
1729 hammer_ref(&ip->lock);
1730 if (ip->flags & HAMMER_INODE_RESIGNAL) {
1731 ip->flags &= ~HAMMER_INODE_RESIGNAL;
1732 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1734 hammer_flush_inode(ip, 0);
1736 hammer_rel_inode(ip, 0);