HAMMER 41B/Many: Cleanup.
[dragonfly.git] / sys / vfs / hammer / hammer_inode.c
CommitLineData
427e5fc6 1/*
b84de5af 2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
427e5fc6
MD
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
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
16 * distribution.
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.
20 *
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
32 * SUCH DAMAGE.
33 *
77062c8a 34 * $DragonFly: src/sys/vfs/hammer/hammer_inode.c,v 1.53 2008/05/06 00:21:08 dillon Exp $
427e5fc6
MD
35 */
36
37#include "hammer.h"
869e8f55 38#include <vm/vm_extern.h>
427e5fc6
MD
39#include <sys/buf.h>
40#include <sys/buf2.h>
41
ec4e8497 42static int hammer_unload_inode(struct hammer_inode *ip);
1f07f686
MD
43static void hammer_flush_inode_core(hammer_inode_t ip, int flags);
44static int hammer_setup_child_callback(hammer_record_t rec, void *data);
1f07f686 45static int hammer_setup_parent_inodes(hammer_record_t record);
b84de5af 46
d113fda1
MD
47/*
48 * The kernel is not actively referencing this vnode but is still holding
49 * it cached.
b84de5af
MD
50 *
51 * This is called from the frontend.
d113fda1 52 */
427e5fc6
MD
53int
54hammer_vop_inactive(struct vop_inactive_args *ap)
55{
66325755 56 struct hammer_inode *ip = VTOI(ap->a_vp);
27ea2398 57
c0ade690
MD
58 /*
59 * Degenerate case
60 */
61 if (ip == NULL) {
66325755 62 vrecycle(ap->a_vp);
c0ade690
MD
63 return(0);
64 }
65
66 /*
1f07f686
MD
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.
c0ade690 70 */
e8599db1 71 hammer_inode_unloadable_check(ip, 0);
4e17f465
MD
72 if (ip->flags & HAMMER_INODE_MODMASK)
73 hammer_flush_inode(ip, 0);
74 else if (ip->ino_rec.ino_nlinks == 0)
d113fda1 75 vrecycle(ap->a_vp);
427e5fc6
MD
76 return(0);
77}
78
d113fda1
MD
79/*
80 * Release the vnode association. This is typically (but not always)
1f07f686 81 * the last reference on the inode.
d113fda1 82 *
1f07f686
MD
83 * Once the association is lost we are on our own with regards to
84 * flushing the inode.
d113fda1 85 */
427e5fc6
MD
86int
87hammer_vop_reclaim(struct vop_reclaim_args *ap)
88{
427e5fc6
MD
89 struct hammer_inode *ip;
90 struct vnode *vp;
91
92 vp = ap->a_vp;
c0ade690 93
a89aec1b
MD
94 if ((ip = vp->v_data) != NULL) {
95 vp->v_data = NULL;
96 ip->vp = NULL;
ec4e8497 97 hammer_rel_inode(ip, 1);
a89aec1b 98 }
427e5fc6
MD
99 return(0);
100}
101
66325755
MD
102/*
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
105 * return.
b84de5af
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106 *
107 * Called from the frontend.
66325755
MD
108 */
109int
e8599db1 110hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp)
66325755
MD
111{
112 struct vnode *vp;
113 int error = 0;
114
115 for (;;) {
116 if ((vp = ip->vp) == NULL) {
117 error = getnewvnode(VT_HAMMER, ip->hmp->mp, vpp, 0, 0);
118 if (error)
119 break;
8cd0a023
MD
120 hammer_lock_ex(&ip->lock);
121 if (ip->vp != NULL) {
122 hammer_unlock(&ip->lock);
123 vp->v_type = VBAD;
124 vx_put(vp);
125 continue;
66325755 126 }
8cd0a023
MD
127 hammer_ref(&ip->lock);
128 vp = *vpp;
129 ip->vp = vp;
130 vp->v_type = hammer_get_vnode_type(
131 ip->ino_rec.base.base.obj_type);
7a04d74f
MD
132
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);
139 break;
140 case HAMMER_OBJTYPE_FIFO:
141 vp->v_ops = &ip->hmp->mp->mnt_vn_fifo_ops;
142 break;
143 default:
144 break;
145 }
42c7d26b
MD
146
147 /*
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().
152 */
153 if (ip->obj_id == HAMMER_OBJID_ROOT &&
154 ip->obj_asof == ip->hmp->asof) {
7a04d74f 155 vp->v_flag |= VROOT;
42c7d26b 156 }
7a04d74f 157
8cd0a023
MD
158 vp->v_data = (void *)ip;
159 /* vnode locked by getnewvnode() */
160 /* make related vnode dirty if inode dirty? */
161 hammer_unlock(&ip->lock);
a89aec1b
MD
162 if (vp->v_type == VREG)
163 vinitvmio(vp, ip->ino_rec.ino_size);
8cd0a023
MD
164 break;
165 }
166
167 /*
168 * loop if the vget fails (aka races), or if the vp
169 * no longer matches ip->vp.
170 */
171 if (vget(vp, LK_EXCLUSIVE) == 0) {
172 if (vp == ip->vp)
173 break;
174 vput(vp);
66325755
MD
175 }
176 }
a89aec1b 177 *vpp = vp;
66325755
MD
178 return(error);
179}
180
181/*
8cd0a023
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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
184 * that).
d113fda1
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185 *
186 * The flags argument is only applied for newly created inodes, and only
187 * certain flags are inherited.
b84de5af
MD
188 *
189 * Called from the frontend.
66325755
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190 */
191struct hammer_inode *
36f82b23 192hammer_get_inode(hammer_transaction_t trans, struct hammer_node **cache,
61aeeb33 193 u_int64_t obj_id, hammer_tid_t asof, int flags, int *errorp)
66325755 194{
36f82b23 195 hammer_mount_t hmp = trans->hmp;
427e5fc6 196 struct hammer_inode_info iinfo;
8cd0a023 197 struct hammer_cursor cursor;
427e5fc6 198 struct hammer_inode *ip;
427e5fc6
MD
199
200 /*
201 * Determine if we already have an inode cached. If we do then
202 * we are golden.
203 */
66325755 204 iinfo.obj_id = obj_id;
7f7c1f84 205 iinfo.obj_asof = asof;
427e5fc6
MD
206loop:
207 ip = hammer_ino_rb_tree_RB_LOOKUP_INFO(&hmp->rb_inos_root, &iinfo);
208 if (ip) {
8cd0a023 209 hammer_ref(&ip->lock);
66325755
MD
210 *errorp = 0;
211 return(ip);
427e5fc6
MD
212 }
213
427e5fc6 214 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
b3deaf57 215 ++hammer_count_inodes;
66325755 216 ip->obj_id = obj_id;
27ea2398 217 ip->obj_asof = iinfo.obj_asof;
66325755 218 ip->hmp = hmp;
d113fda1
MD
219 ip->flags = flags & HAMMER_INODE_RO;
220 if (hmp->ronly)
221 ip->flags |= HAMMER_INODE_RO;
a5fddc16 222 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
8cd0a023 223 RB_INIT(&ip->rec_tree);
059819e3 224 TAILQ_INIT(&ip->bio_list);
b84de5af 225 TAILQ_INIT(&ip->bio_alt_list);
1f07f686 226 TAILQ_INIT(&ip->target_list);
427e5fc6
MD
227
228 /*
8cd0a023 229 * Locate the on-disk inode.
427e5fc6 230 */
6a37e7e4 231retry:
4e17f465 232 hammer_init_cursor(trans, &cursor, cache, NULL);
8cd0a023
MD
233 cursor.key_beg.obj_id = ip->obj_id;
234 cursor.key_beg.key = 0;
d5530d22 235 cursor.key_beg.create_tid = 0;
8cd0a023
MD
236 cursor.key_beg.delete_tid = 0;
237 cursor.key_beg.rec_type = HAMMER_RECTYPE_INODE;
238 cursor.key_beg.obj_type = 0;
d5530d22
MD
239 cursor.asof = iinfo.obj_asof;
240 cursor.flags = HAMMER_CURSOR_GET_RECORD | HAMMER_CURSOR_GET_DATA |
241 HAMMER_CURSOR_ASOF;
8cd0a023
MD
242
243 *errorp = hammer_btree_lookup(&cursor);
6a37e7e4
MD
244 if (*errorp == EDEADLK) {
245 hammer_done_cursor(&cursor);
246 goto retry;
247 }
427e5fc6
MD
248
249 /*
250 * On success the B-Tree lookup will hold the appropriate
251 * buffer cache buffers and provide a pointer to the requested
d113fda1
MD
252 * information. Copy the information to the in-memory inode
253 * and cache the B-Tree node to improve future operations.
427e5fc6 254 */
66325755 255 if (*errorp == 0) {
8cd0a023 256 ip->ino_rec = cursor.record->inode;
40043e7f 257 ip->ino_data = cursor.data->inode;
61aeeb33
MD
258 hammer_cache_node(cursor.node, &ip->cache[0]);
259 if (cache)
260 hammer_cache_node(cursor.node, cache);
427e5fc6 261 }
427e5fc6
MD
262
263 /*
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.
b3deaf57
MD
267 *
268 * The cursor's locked node interlocks against others creating and
269 * destroying ip while we were blocked.
427e5fc6 270 */
66325755 271 if (*errorp == 0) {
8cd0a023 272 hammer_ref(&ip->lock);
427e5fc6 273 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
61aeeb33
MD
274 hammer_uncache_node(&ip->cache[0]);
275 hammer_uncache_node(&ip->cache[1]);
b84de5af 276 KKASSERT(ip->lock.refs == 1);
b3deaf57 277 --hammer_count_inodes;
427e5fc6 278 kfree(ip, M_HAMMER);
b3deaf57 279 hammer_done_cursor(&cursor);
427e5fc6
MD
280 goto loop;
281 }
c0ade690 282 ip->flags |= HAMMER_INODE_ONDISK;
427e5fc6 283 } else {
19619882
MD
284 /*
285 * Do not panic on read-only accesses which fail, particularly
286 * historical accesses where the snapshot might not have
287 * complete connectivity.
288 */
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);
77062c8a 292 Debugger("x");
19619882 293 }
b3deaf57 294 --hammer_count_inodes;
66325755
MD
295 kfree(ip, M_HAMMER);
296 ip = NULL;
427e5fc6 297 }
b3deaf57 298 hammer_done_cursor(&cursor);
66325755
MD
299 return (ip);
300}
301
8cd0a023
MD
302/*
303 * Create a new filesystem object, returning the inode in *ipp. The
1f07f686 304 * returned inode will be referenced.
8cd0a023 305 *
b84de5af 306 * The inode is created in-memory.
8cd0a023
MD
307 */
308int
a89aec1b
MD
309hammer_create_inode(hammer_transaction_t trans, struct vattr *vap,
310 struct ucred *cred, hammer_inode_t dip,
8cd0a023 311 struct hammer_inode **ipp)
66325755 312{
a89aec1b
MD
313 hammer_mount_t hmp;
314 hammer_inode_t ip;
6b4f890b 315 uid_t xuid;
66325755 316
8cd0a023
MD
317 hmp = trans->hmp;
318 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
b3deaf57 319 ++hammer_count_inodes;
0729c8c8 320 ip->obj_id = hammer_alloc_objid(trans, dip);
8cd0a023 321 KKASSERT(ip->obj_id != 0);
7f7c1f84 322 ip->obj_asof = hmp->asof;
8cd0a023 323 ip->hmp = hmp;
b84de5af 324 ip->flush_state = HAMMER_FST_IDLE;
8cd0a023 325 ip->flags = HAMMER_INODE_DDIRTY | HAMMER_INODE_RDIRTY |
b84de5af 326 HAMMER_INODE_ITIMES;
8cd0a023 327
a5fddc16 328 ip->trunc_off = 0x7FFFFFFFFFFFFFFFLL;
8cd0a023 329 RB_INIT(&ip->rec_tree);
059819e3 330 TAILQ_INIT(&ip->bio_list);
b84de5af 331 TAILQ_INIT(&ip->bio_alt_list);
1f07f686 332 TAILQ_INIT(&ip->target_list);
8cd0a023 333
b84de5af
MD
334 ip->ino_rec.ino_atime = trans->time;
335 ip->ino_rec.ino_mtime = trans->time;
8cd0a023
MD
336 ip->ino_rec.ino_size = 0;
337 ip->ino_rec.ino_nlinks = 0;
338 /* XXX */
fe7678ee 339 ip->ino_rec.base.base.btype = HAMMER_BTREE_TYPE_RECORD;
8cd0a023
MD
340 ip->ino_rec.base.base.obj_id = ip->obj_id;
341 ip->ino_rec.base.base.key = 0;
b84de5af 342 ip->ino_rec.base.base.create_tid = 0;
8cd0a023
MD
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);
346
347 ip->ino_data.version = HAMMER_INODE_DATA_VERSION;
348 ip->ino_data.mode = vap->va_mode;
b84de5af 349 ip->ino_data.ctime = trans->time;
8cd0a023 350 ip->ino_data.parent_obj_id = (dip) ? dip->ino_rec.base.base.obj_id : 0;
6b4f890b 351
7a04d74f
MD
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;
357 break;
358 default:
359 break;
360 }
361
6b4f890b
MD
362 /*
363 * Calculate default uid/gid and overwrite with information from
364 * the vap.
365 */
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,
369 &vap->va_mode);
370 ip->ino_data.mode = vap->va_mode;
371
8cd0a023
MD
372 if (vap->va_vaflags & VA_UID_UUID_VALID)
373 ip->ino_data.uid = vap->va_uid_uuid;
6b4f890b
MD
374 else if (vap->va_uid != (uid_t)VNOVAL)
375 hammer_guid_to_uuid(&ip->ino_data.uid, xuid);
8cd0a023
MD
376 if (vap->va_vaflags & VA_GID_UUID_VALID)
377 ip->ino_data.gid = vap->va_gid_uuid;
6b4f890b 378 else if (vap->va_gid != (gid_t)VNOVAL)
8cd0a023
MD
379 hammer_guid_to_uuid(&ip->ino_data.gid, vap->va_gid);
380
381 hammer_ref(&ip->lock);
382 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
383 hammer_unref(&ip->lock);
a89aec1b 384 panic("hammer_create_inode: duplicate obj_id %llx", ip->obj_id);
8cd0a023
MD
385 }
386 *ipp = ip;
387 return(0);
66325755
MD
388}
389
d113fda1
MD
390/*
391 * Called by hammer_sync_inode().
392 */
393static int
4e17f465 394hammer_update_inode(hammer_cursor_t cursor, hammer_inode_t ip)
c0ade690 395{
4e17f465 396 hammer_transaction_t trans = cursor->trans;
c0ade690
MD
397 hammer_record_t record;
398 int error;
399
d26d0ae9 400retry:
c0ade690
MD
401 error = 0;
402
869e8f55
MD
403 /*
404 * If the inode has a presence on-disk then locate it and mark
405 * it deleted, setting DELONDISK.
406 *
407 * The record may or may not be physically deleted, depending on
408 * the retention policy.
409 */
76376933
MD
410 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
411 HAMMER_INODE_ONDISK) {
4e17f465
MD
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;
423
424 error = hammer_btree_lookup(cursor);
e8599db1
MD
425 if (hammer_debug_inode)
426 kprintf("IPDEL %p %08x %d", ip, ip->flags, error);
b84de5af
MD
427 if (error) {
428 kprintf("error %d\n", error);
429 Debugger("hammer_update_inode");
430 }
431
c0ade690 432 if (error == 0) {
4e17f465 433 error = hammer_ip_delete_record(cursor, trans->tid);
e8599db1
MD
434 if (hammer_debug_inode)
435 kprintf(" error %d\n", error);
f90dde4c 436 if (error && error != EDEADLK) {
b84de5af
MD
437 kprintf("error %d\n", error);
438 Debugger("hammer_update_inode2");
439 }
1f07f686 440 if (error == 0) {
195c19a1 441 ip->flags |= HAMMER_INODE_DELONDISK;
1f07f686 442 }
e8599db1
MD
443 if (cursor->node)
444 hammer_cache_node(cursor->node, &ip->cache[0]);
4e17f465
MD
445 }
446 if (error == EDEADLK) {
447 hammer_done_cursor(cursor);
448 error = hammer_init_cursor(trans, cursor,
449 &ip->cache[0], ip);
e8599db1
MD
450 if (hammer_debug_inode)
451 kprintf("IPDED %p %d\n", ip, error);
4e17f465
MD
452 if (error == 0)
453 goto retry;
c0ade690 454 }
c0ade690
MD
455 }
456
457 /*
869e8f55
MD
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.
76376933 461 *
869e8f55
MD
462 * Update our inode statistics if this is the first application of
463 * the inode on-disk.
c0ade690 464 */
869e8f55
MD
465 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED) == 0) {
466 /*
467 * Generate a record and write it to the media
468 */
40043e7f 469 record = hammer_alloc_mem_record(ip);
e8599db1 470 record->type = HAMMER_MEM_RECORD_GENERAL;
1f07f686 471 record->flush_state = HAMMER_FST_FLUSH;
b84de5af 472 record->rec.inode = ip->sync_ino_rec;
855942b6 473 record->rec.inode.base.base.create_tid = trans->tid;
b84de5af 474 record->rec.inode.base.data_len = sizeof(ip->sync_ino_data);
19619882 475 record->rec.base.signature = HAMMER_RECORD_SIGNATURE_GOOD;
b84de5af 476 record->data = (void *)&ip->sync_ino_data;
d36ec43b 477 record->flags |= HAMMER_RECF_INTERLOCK_BE;
4e17f465
MD
478 for (;;) {
479 error = hammer_ip_sync_record_cursor(cursor, record);
e8599db1
MD
480 if (hammer_debug_inode)
481 kprintf("GENREC %p rec %08x %d\n",
482 ip, record->flags, error);
4e17f465
MD
483 if (error != EDEADLK)
484 break;
485 hammer_done_cursor(cursor);
486 error = hammer_init_cursor(trans, cursor,
487 &ip->cache[0], ip);
e8599db1
MD
488 if (hammer_debug_inode)
489 kprintf("GENREC reinit %d\n", error);
4e17f465
MD
490 if (error)
491 break;
492 }
b84de5af
MD
493 if (error) {
494 kprintf("error %d\n", error);
495 Debugger("hammer_update_inode3");
496 }
d36ec43b
MD
497
498 /*
499 * The record isn't managed by the inode's record tree,
500 * destroy it whether we succeed or fail.
501 */
502 record->flags &= ~HAMMER_RECF_INTERLOCK_BE;
503 record->flags |= HAMMER_RECF_DELETED_FE;
1f07f686 504 record->flush_state = HAMMER_FST_IDLE;
b3deaf57 505 hammer_rel_mem_record(record);
d36ec43b 506
869e8f55
MD
507 /*
508 * Finish up.
509 */
d26d0ae9 510 if (error == 0) {
e8599db1
MD
511 if (hammer_debug_inode)
512 kprintf("CLEANDELOND %p %08x\n", ip, ip->flags);
b84de5af
MD
513 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY |
514 HAMMER_INODE_DDIRTY |
515 HAMMER_INODE_ITIMES);
516 ip->flags &= ~HAMMER_INODE_DELONDISK;
1f07f686
MD
517
518 /*
519 * Root volume count of inodes
520 */
d26d0ae9 521 if ((ip->flags & HAMMER_INODE_ONDISK) == 0) {
e8599db1
MD
522 hammer_modify_volume_field(trans,
523 trans->rootvol,
524 vol0_stat_inodes);
0b075555 525 ++ip->hmp->rootvol->ondisk->vol0_stat_inodes;
10a5d1ba 526 hammer_modify_volume_done(trans->rootvol);
d26d0ae9 527 ip->flags |= HAMMER_INODE_ONDISK;
e8599db1
MD
528 if (hammer_debug_inode)
529 kprintf("NOWONDISK %p\n", ip);
d26d0ae9 530 }
fbc6e32a 531 }
c0ade690 532 }
869e8f55
MD
533
534 /*
535 * If the inode has been destroyed, clean out any left-over flags
536 * that may have been set by the frontend.
537 */
f90dde4c 538 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED)) {
f90dde4c
MD
539 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY |
540 HAMMER_INODE_DDIRTY |
541 HAMMER_INODE_ITIMES);
542 }
c0ade690
MD
543 return(error);
544}
545
a89aec1b 546/*
d113fda1
MD
547 * Update only the itimes fields. This is done no-historically. The
548 * record is updated in-place on the disk.
549 */
550static int
4e17f465 551hammer_update_itimes(hammer_cursor_t cursor, hammer_inode_t ip)
d113fda1 552{
4e17f465 553 hammer_transaction_t trans = cursor->trans;
d113fda1
MD
554 struct hammer_inode_record *rec;
555 int error;
556
6a37e7e4 557retry:
d113fda1
MD
558 error = 0;
559 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
560 HAMMER_INODE_ONDISK) {
4e17f465
MD
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;
572
573 error = hammer_btree_lookup(cursor);
b84de5af
MD
574 if (error) {
575 kprintf("error %d\n", error);
576 Debugger("hammer_update_itimes1");
577 }
d113fda1 578 if (error == 0) {
10a5d1ba
MD
579 /*
580 * Do not generate UNDO records for atime/mtime
581 * updates.
582 */
4e17f465 583 rec = &cursor->record->inode;
19619882
MD
584 hammer_modify_record_noundo(trans,
585 cursor->record_buffer,
586 cursor->record);
b84de5af
MD
587 rec->ino_atime = ip->sync_ino_rec.ino_atime;
588 rec->ino_mtime = ip->sync_ino_rec.ino_mtime;
19619882
MD
589 hammer_modify_record_done(cursor->record_buffer,
590 cursor->record);
b84de5af 591 ip->sync_flags &= ~HAMMER_INODE_ITIMES;
d113fda1 592 /* XXX recalculate crc */
4e17f465
MD
593 hammer_cache_node(cursor->node, &ip->cache[0]);
594 }
595 if (error == EDEADLK) {
596 hammer_done_cursor(cursor);
597 error = hammer_init_cursor(trans, cursor,
598 &ip->cache[0], ip);
599 if (error == 0)
600 goto retry;
d113fda1 601 }
d113fda1
MD
602 }
603 return(error);
604}
605
606/*
1f07f686 607 * Release a reference on an inode, flush as requested.
b84de5af
MD
608 *
609 * On the last reference we queue the inode to the flusher for its final
610 * disposition.
a89aec1b 611 */
66325755 612void
a89aec1b 613hammer_rel_inode(struct hammer_inode *ip, int flush)
66325755 614{
1f07f686
MD
615 hammer_mount_t hmp = ip->hmp;
616
f90dde4c
MD
617 /*
618 * Handle disposition when dropping the last ref.
619 */
1f07f686
MD
620 for (;;) {
621 if (ip->lock.refs == 1) {
622 /*
623 * Determine whether on-disk action is needed for
624 * the inode's final disposition.
625 */
e8599db1
MD
626 KKASSERT(ip->vp == NULL);
627 hammer_inode_unloadable_check(ip, 0);
4e17f465
MD
628 if (ip->flags & HAMMER_INODE_MODMASK) {
629 hammer_flush_inode(ip, 0);
630 } else if (ip->lock.refs == 1) {
1f07f686
MD
631 hammer_unload_inode(ip);
632 break;
633 }
b84de5af 634 } else {
4e17f465 635 if (flush)
1f07f686 636 hammer_flush_inode(ip, 0);
4e17f465 637
1f07f686
MD
638 /*
639 * The inode still has multiple refs, try to drop
640 * one ref.
641 */
642 KKASSERT(ip->lock.refs >= 1);
643 if (ip->lock.refs > 1) {
644 hammer_unref(&ip->lock);
645 break;
646 }
b84de5af 647 }
f90dde4c
MD
648 }
649
650 /*
1f07f686
MD
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.
f90dde4c 655 */
1f07f686
MD
656 if (++hmp->reclaim_count > 256) {
657 hmp->reclaim_count = 0;
658 hammer_flusher_async(hmp);
9480ff55 659 }
427e5fc6
MD
660}
661
27ea2398 662/*
b84de5af
MD
663 * Unload and destroy the specified inode. Must be called with one remaining
664 * reference. The reference is disposed of.
8cd0a023 665 *
b84de5af 666 * This can only be called in the context of the flusher.
27ea2398 667 */
b84de5af 668static int
ec4e8497 669hammer_unload_inode(struct hammer_inode *ip)
27ea2398 670{
b84de5af 671 KASSERT(ip->lock.refs == 1,
a89aec1b 672 ("hammer_unload_inode: %d refs\n", ip->lock.refs));
8cd0a023 673 KKASSERT(ip->vp == NULL);
f90dde4c
MD
674 KKASSERT(ip->flush_state == HAMMER_FST_IDLE);
675 KKASSERT(ip->cursor_ip_refs == 0);
676 KKASSERT((ip->flags & HAMMER_INODE_MODMASK) == 0);
677
678 KKASSERT(RB_EMPTY(&ip->rec_tree));
1f07f686 679 KKASSERT(TAILQ_EMPTY(&ip->target_list));
f90dde4c
MD
680 KKASSERT(TAILQ_EMPTY(&ip->bio_list));
681 KKASSERT(TAILQ_EMPTY(&ip->bio_alt_list));
682
683 RB_REMOVE(hammer_ino_rb_tree, &ip->hmp->rb_inos_root, ip);
684
685 hammer_uncache_node(&ip->cache[0]);
686 hammer_uncache_node(&ip->cache[1]);
0729c8c8
MD
687 if (ip->objid_cache)
688 hammer_clear_objid(ip);
f90dde4c
MD
689 --hammer_count_inodes;
690 kfree(ip, M_HAMMER);
6b4f890b 691
27ea2398
MD
692 return(0);
693}
694
427e5fc6 695/*
d113fda1
MD
696 * A transaction has modified an inode, requiring updates as specified by
697 * the passed flags.
7f7c1f84 698 *
d113fda1
MD
699 * HAMMER_INODE_RDIRTY: Inode record has been updated
700 * HAMMER_INODE_DDIRTY: Inode data has been updated
1f07f686 701 * HAMMER_INODE_XDIRTY: Dirty in-memory records
4e17f465 702 * HAMMER_INODE_BUFS: Dirty buffer cache buffers
d113fda1
MD
703 * HAMMER_INODE_DELETED: Inode record/data must be deleted
704 * HAMMER_INODE_ITIMES: mtime/atime has been updated
427e5fc6 705 */
66325755 706void
b84de5af 707hammer_modify_inode(hammer_transaction_t trans, hammer_inode_t ip, int flags)
427e5fc6 708{
d113fda1 709 KKASSERT ((ip->flags & HAMMER_INODE_RO) == 0 ||
b84de5af 710 (flags & (HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
1f07f686 711 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS|
b84de5af
MD
712 HAMMER_INODE_DELETED|HAMMER_INODE_ITIMES)) == 0);
713
714 ip->flags |= flags;
715}
716
717/*
1f07f686
MD
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.
b84de5af 721 *
1f07f686
MD
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.
b84de5af
MD
725 */
726void
f90dde4c 727hammer_flush_inode(hammer_inode_t ip, int flags)
b84de5af 728{
1f07f686
MD
729 hammer_record_t depend;
730 int r, good;
731
732 /*
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.
736 */
4e17f465 737 if ((ip->flags & HAMMER_INODE_MODMASK) == 0) {
1f07f686
MD
738 if (ip->flush_state == HAMMER_FST_SETUP) {
739 ip->flush_state = HAMMER_FST_IDLE;
740 hammer_rel_inode(ip, 0);
ec4e8497 741 }
b84de5af
MD
742 return;
743 }
42c7d26b 744
1f07f686
MD
745 /*
746 * Our flush action will depend on the current state.
747 */
748 switch(ip->flush_state) {
749 case HAMMER_FST_IDLE:
750 /*
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.
754 */
755 hammer_flush_inode_core(ip, flags);
756 break;
757 case HAMMER_FST_SETUP:
758 /*
759 * Recurse upwards through dependancies via target_list
760 * and start their flusher actions going if possible.
761 *
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.
765 */
766 good = 0;
767 TAILQ_FOREACH(depend, &ip->target_list, target_entry) {
768 r = hammer_setup_parent_inodes(depend);
769 if (r < 0 && good == 0)
770 good = -1;
771 if (r > 0)
772 good = 1;
773 }
774
775 /*
776 * We can continue if good >= 0. Determine how many records
777 * under our inode can be flushed (and mark them).
778 */
1f07f686
MD
779 if (good >= 0) {
780 hammer_flush_inode_core(ip, flags);
781 } else {
782 ip->flags |= HAMMER_INODE_REFLUSH;
4e17f465
MD
783 if (flags & HAMMER_FLUSH_SIGNAL) {
784 ip->flags |= HAMMER_INODE_RESIGNAL;
785 hammer_flusher_async(ip->hmp);
786 }
1f07f686
MD
787 }
788 break;
789 default:
790 /*
791 * We are already flushing, flag the inode to reflush
792 * if needed after it completes its current flush.
793 */
794 if ((ip->flags & HAMMER_INODE_REFLUSH) == 0)
795 ip->flags |= HAMMER_INODE_REFLUSH;
4e17f465
MD
796 if (flags & HAMMER_FLUSH_SIGNAL) {
797 ip->flags |= HAMMER_INODE_RESIGNAL;
798 hammer_flusher_async(ip->hmp);
799 }
1f07f686
MD
800 break;
801 }
802}
803
804/*
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.
808 *
809 * Return 1 if the record gives us connectivity
810 *
811 * Return 0 if the record is not relevant
812 *
813 * Return -1 if we can't resolve the dependancy and there is no connectivity.
814 */
815static int
816hammer_setup_parent_inodes(hammer_record_t record)
817{
818 hammer_mount_t hmp = record->ip->hmp;
819 hammer_record_t depend;
820 hammer_inode_t ip;
821 int r, good;
822
823 KKASSERT(record->flush_state != HAMMER_FST_IDLE);
824 ip = record->ip;
825
826 /*
827 * If the record is already flushing, is it in our flush group?
828 *
e8599db1
MD
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).
1f07f686
MD
833 */
834 if (record->flush_state == HAMMER_FST_FLUSH) {
835 if (record->flush_group != hmp->flusher_next) {
836 ip->flags |= HAMMER_INODE_REFLUSH;
837 return(-1);
f90dde4c 838 }
1f07f686
MD
839 if (record->type == HAMMER_MEM_RECORD_ADD)
840 return(1);
e8599db1 841 /* GENERAL or DEL */
1f07f686
MD
842 return(0);
843 }
844
845 /*
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.
848 */
849 KKASSERT(record->flush_state == HAMMER_FST_SETUP);
850
851 good = 0;
852 TAILQ_FOREACH(depend, &ip->target_list, target_entry) {
853 r = hammer_setup_parent_inodes(depend);
854 if (r < 0 && good == 0)
855 good = -1;
856 if (r > 0)
857 good = 1;
858 }
859
860 /*
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.
864 */
865 if (good < 0) {
866 ip->flags |= HAMMER_INODE_REFLUSH;
867 return(good);
868 }
869
870 /*
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.
875 */
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);
880
881#if 0
882 if (record->type == HAMMER_MEM_RECORD_DEL &&
869e8f55 883 (record->target_ip->flags & (HAMMER_INODE_DELETED|HAMMER_INODE_DELONDISK)) == 0) {
1f07f686
MD
884 /*
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.
888 *
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.
892 */
893 record->target_ip->flags |= HAMMER_INODE_REFLUSH;
894 return(-1);
895 } else
896#endif
897 if (ip->flush_group == ip->hmp->flusher_next) {
898 /*
899 * This is the record we wanted to synchronize.
900 */
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)
905 return(1);
906
907 /*
e8599db1
MD
908 * A general or delete-on-disk record does not contribute
909 * to our visibility. We can still flush it, however.
1f07f686
MD
910 */
911 return(0);
912 } else {
913 /*
914 * We couldn't resolve the dependancies, request that the
915 * inode be flushed when the dependancies can be resolved.
916 */
917 ip->flags |= HAMMER_INODE_REFLUSH;
918 return(-1);
7f7c1f84 919 }
c0ade690
MD
920}
921
922/*
1f07f686 923 * This is the core routine placing an inode into the FST_FLUSH state.
c0ade690 924 */
b84de5af 925static void
1f07f686 926hammer_flush_inode_core(hammer_inode_t ip, int flags)
b84de5af 927{
1f07f686 928 int go_count;
1f07f686 929
4e17f465
MD
930 /*
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.
934 */
1f07f686
MD
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;
4e17f465 940 ++ip->hmp->flusher_lock;
b84de5af 941
e8599db1
MD
942 /*
943 * We need to be able to vfsync/truncate from the backend.
944 */
945 KKASSERT((ip->flags & HAMMER_INODE_VHELD) == 0);
946 if (ip->vp && (ip->vp->v_flag & VINACTIVE) == 0) {
947 ip->flags |= HAMMER_INODE_VHELD;
948 vref(ip->vp);
949 }
950
ec4e8497 951 /*
1f07f686
MD
952 * Figure out how many in-memory records we can actually flush
953 * (not including inode meta-data, buffers, etc).
ec4e8497 954 */
1f07f686
MD
955 if (flags & HAMMER_FLUSH_RECURSION) {
956 go_count = 1;
957 } else {
958 go_count = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
959 hammer_setup_child_callback, NULL);
960 }
b84de5af
MD
961
962 /*
1f07f686
MD
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.
b84de5af 967 */
1f07f686
MD
968 if (go_count == 0) {
969 if ((ip->flags & HAMMER_INODE_MODMASK_NOXDIRTY) == 0) {
970 ip->flags |= HAMMER_INODE_REFLUSH;
971 ip->flush_state = HAMMER_FST_SETUP;
e8599db1
MD
972 if (ip->flags & HAMMER_INODE_VHELD) {
973 ip->flags &= ~HAMMER_INODE_VHELD;
974 vrele(ip->vp);
975 }
4e17f465
MD
976 if (flags & HAMMER_FLUSH_SIGNAL) {
977 ip->flags |= HAMMER_INODE_RESIGNAL;
978 hammer_flusher_async(ip->hmp);
979 }
980 if (--ip->hmp->flusher_lock == 0)
981 wakeup(&ip->hmp->flusher_lock);
1f07f686
MD
982 return;
983 }
984 }
b84de5af 985
b84de5af
MD
986 /*
987 * Snapshot the state of the inode for the backend flusher.
988 *
989 * The truncation must be retained in the frontend until after
990 * we've actually performed the record deletion.
1f07f686
MD
991 *
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.
b84de5af
MD
995 */
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;
4e17f465 1000 ip->flags &= ~HAMMER_INODE_MODMASK | HAMMER_INODE_TRUNCATED;
b84de5af
MD
1001
1002 /*
4e17f465 1003 * The flusher list inherits our inode and reference.
b84de5af 1004 */
1f07f686 1005 TAILQ_INSERT_TAIL(&ip->hmp->flush_list, ip, flush_entry);
4e17f465
MD
1006 if (--ip->hmp->flusher_lock == 0)
1007 wakeup(&ip->hmp->flusher_lock);
1f07f686
MD
1008
1009 if (flags & HAMMER_FLUSH_SIGNAL)
1010 hammer_flusher_async(ip->hmp);
b84de5af
MD
1011}
1012
ec4e8497 1013/*
1f07f686
MD
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.
1017 *
1018 * If we get stuck on a record we have to set HAMMER_INODE_REFLUSH on
1019 * both inodes.
1020 *
1021 * We return 1 for any record placed or found in FST_FLUSH, which prevents
1022 * the caller from shortcutting the flush.
ec4e8497 1023 */
c0ade690 1024static int
1f07f686 1025hammer_setup_child_callback(hammer_record_t rec, void *data)
b84de5af 1026{
1f07f686
MD
1027 hammer_inode_t target_ip;
1028 hammer_inode_t ip;
1029 int r;
1030
1031 /*
1032 * If the record has been deleted by the backend (it's being held
1033 * by the frontend in a race), just ignore it.
1034 */
1035 if (rec->flags & HAMMER_RECF_DELETED_BE)
ec4e8497 1036 return(0);
1f07f686
MD
1037
1038 /*
1039 * If the record is in an idle state it has no dependancies and
1040 * can be flushed.
1041 */
1042 ip = rec->ip;
1043 r = 0;
1044
1045 switch(rec->flush_state) {
1046 case HAMMER_FST_IDLE:
1047 /*
1048 * Record has no setup dependancy, we can flush it.
1049 */
1050 KKASSERT(rec->target_ip == NULL);
1051 rec->flush_state = HAMMER_FST_FLUSH;
1052 rec->flush_group = ip->flush_group;
b84de5af 1053 hammer_ref(&rec->lock);
1f07f686
MD
1054 r = 1;
1055 break;
1056 case HAMMER_FST_SETUP:
1057 /*
1058 * Record has a setup dependancy. Try to include the
1059 * target ip in the flush.
1060 *
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.
1064 */
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) {
1069 /*
1070 * If the target IP is already flushing in our group
1071 * we are golden, otherwise make sure the target
1072 * reflushes.
1073 */
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);
1078 r = 1;
1079 } else {
1080 target_ip->flags |= HAMMER_INODE_REFLUSH;
1081 }
1082 } else if (rec->type == HAMMER_MEM_RECORD_ADD) {
1083 /*
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.
1088 */
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);
1094 r = 1;
1095 } else {
1096 /*
e8599db1
MD
1097 * General or delete-on-disk record.
1098 *
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.
1f07f686
MD
1102 *
1103 * XXX
1104 */
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);
1110 r = 1;
1111 }
1112 break;
1113 case HAMMER_FST_FLUSH:
1114 /*
1115 * Record already associated with a flush group. It had
1116 * better be ours.
1117 */
1118 KKASSERT(rec->flush_group == ip->flush_group);
1119 r = 1;
1120 break;
b84de5af 1121 }
1f07f686 1122 return(r);
b84de5af
MD
1123}
1124
b84de5af
MD
1125/*
1126 * Wait for a previously queued flush to complete
1127 */
1128void
1129hammer_wait_inode(hammer_inode_t ip)
1130{
e8599db1 1131 while (ip->flush_state != HAMMER_FST_IDLE) {
b84de5af
MD
1132 ip->flags |= HAMMER_INODE_FLUSHW;
1133 tsleep(&ip->flags, 0, "hmrwin", 0);
1134 }
1135}
1136
1137/*
1138 * Called by the backend code when a flush has been completed.
1139 * The inode has already been removed from the flush list.
1140 *
1141 * A pipelined flush can occur, in which case we must re-enter the
1142 * inode on the list and re-copy its fields.
1143 */
1144void
1145hammer_flush_inode_done(hammer_inode_t ip)
1146{
1955afa7 1147 struct bio *bio;
1f07f686 1148 int dorel = 0;
1955afa7 1149
b84de5af
MD
1150 KKASSERT(ip->flush_state == HAMMER_FST_FLUSH);
1151
1f07f686
MD
1152 /*
1153 * Allow BIOs to queue to the inode's primary bioq again.
1154 */
1155 ip->flags &= ~HAMMER_INODE_WRITE_ALT;
1156
1157 /*
1158 * Merge left-over flags back into the frontend and fix the state.
1159 */
b84de5af 1160 ip->flags |= ip->sync_flags;
1f07f686
MD
1161
1162 /*
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.
1165 */
1166 if (ip->ino_rec.ino_nlinks != ip->sync_ino_rec.ino_nlinks)
1167 ip->flags |= HAMMER_INODE_RDIRTY;
b84de5af 1168
b84de5af 1169 /*
1955afa7
MD
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.
b84de5af
MD
1172 */
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);
4e17f465
MD
1176 }
1177 /*
1178 * Fix up the dirty buffer status.
1179 */
1180 if (TAILQ_FIRST(&ip->bio_list) ||
1181 (ip->vp && RB_ROOT(&ip->vp->v_rbdirty_tree))) {
1f07f686 1182 ip->flags |= HAMMER_INODE_BUFS;
1f07f686
MD
1183 }
1184
1185 /*
1186 * Re-set the XDIRTY flag if some of the inode's in-memory records
1187 * could not be flushed.
1188 */
4e17f465 1189 if (RB_ROOT(&ip->rec_tree))
f90dde4c 1190 ip->flags |= HAMMER_INODE_XDIRTY;
4e17f465
MD
1191
1192 /*
1193 * Do not lose track of inodes which no longer have vnode
1194 * assocations, otherwise they may never get flushed again.
1195 */
1196 if ((ip->flags & HAMMER_INODE_MODMASK) && ip->vp == NULL)
b84de5af 1197 ip->flags |= HAMMER_INODE_REFLUSH;
4e17f465
MD
1198
1199 /*
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
1203 */
1204 if (TAILQ_EMPTY(&ip->target_list) && RB_EMPTY(&ip->rec_tree)) {
1205 ip->flush_state = HAMMER_FST_IDLE;
1206 dorel = 1;
1207 } else {
1208 ip->flush_state = HAMMER_FST_SETUP;
b84de5af 1209 }
b84de5af 1210
e8599db1
MD
1211 /*
1212 * Clean up the vnode ref
1213 */
1214 if (ip->flags & HAMMER_INODE_VHELD) {
1215 ip->flags &= ~HAMMER_INODE_VHELD;
1216 vrele(ip->vp);
1217 }
1218
b84de5af
MD
1219 /*
1220 * If the frontend made more changes and requested another flush,
4e17f465 1221 * then try to get it running.
b84de5af
MD
1222 */
1223 if (ip->flags & HAMMER_INODE_REFLUSH) {
1224 ip->flags &= ~HAMMER_INODE_REFLUSH;
4e17f465
MD
1225 if (ip->flags & HAMMER_INODE_RESIGNAL) {
1226 ip->flags &= ~HAMMER_INODE_RESIGNAL;
1227 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1228 } else {
1229 hammer_flush_inode(ip, 0);
0729c8c8 1230 }
4e17f465
MD
1231 }
1232
1233 /*
1234 * Finally, if the frontend is waiting for a flush to complete,
1235 * wake it up.
1236 */
1237 if (ip->flush_state != HAMMER_FST_FLUSH) {
b84de5af
MD
1238 if (ip->flags & HAMMER_INODE_FLUSHW) {
1239 ip->flags &= ~HAMMER_INODE_FLUSHW;
1240 wakeup(&ip->flags);
1241 }
1242 }
1f07f686
MD
1243 if (dorel)
1244 hammer_rel_inode(ip, 0);
b84de5af
MD
1245}
1246
1247/*
1248 * Called from hammer_sync_inode() to synchronize in-memory records
1249 * to the media.
1250 */
1251static int
1252hammer_sync_record_callback(hammer_record_t record, void *data)
c0ade690 1253{
4e17f465
MD
1254 hammer_cursor_t cursor = data;
1255 hammer_transaction_t trans = cursor->trans;
c0ade690
MD
1256 int error;
1257
b84de5af 1258 /*
1f07f686 1259 * Skip records that do not belong to the current flush.
b84de5af 1260 */
1f07f686 1261 if (record->flush_state != HAMMER_FST_FLUSH)
b84de5af 1262 return(0);
1f07f686
MD
1263 KKASSERT((record->flags & HAMMER_RECF_DELETED_BE) == 0);
1264#if 1
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);
1267 Debugger("blah2");
1268 return(0);
1269 }
1270#endif
1271 KKASSERT(record->flush_group == record->ip->flush_group);
d36ec43b
MD
1272
1273 /*
1274 * Interlock the record using the BE flag. Once BE is set the
1275 * frontend cannot change the state of FE.
1276 *
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.
1280 */
4e17f465 1281 KKASSERT((record->flags & HAMMER_RECF_INTERLOCK_BE) == 0);
d36ec43b
MD
1282 record->flags |= HAMMER_RECF_INTERLOCK_BE;
1283
1284 /*
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
1f07f686 1288 * have ip_sync_record convert the record to MEM_RECORD_DEL before
d36ec43b
MD
1289 * it inserts the B-Tree record. Otherwise the media sync might
1290 * be visible to the frontend.
1291 */
1f07f686 1292 if (record->flags & HAMMER_RECF_DELETED_FE) {
e8599db1
MD
1293 if (record->type == HAMMER_MEM_RECORD_ADD) {
1294 record->flags |= HAMMER_RECF_CONVERT_DELETE;
1295 } else {
1296 KKASSERT(record->type != HAMMER_MEM_RECORD_DEL);
1297 return(0);
1298 }
1f07f686 1299 }
b84de5af
MD
1300
1301 /*
1302 * Assign the create_tid for new records. Deletions already
1303 * have the record's entire key properly set up.
1304 */
1f07f686 1305 if (record->type != HAMMER_MEM_RECORD_DEL)
b84de5af 1306 record->rec.inode.base.base.create_tid = trans->tid;
4e17f465
MD
1307 for (;;) {
1308 error = hammer_ip_sync_record_cursor(cursor, record);
1309 if (error != EDEADLK)
1310 break;
1311 hammer_done_cursor(cursor);
1312 error = hammer_init_cursor(trans, cursor, &record->ip->cache[0],
1313 record->ip);
1314 if (error)
1315 break;
1316 }
1317 record->flags &= ~HAMMER_RECF_CONVERT_DELETE;
c0ade690
MD
1318
1319 if (error) {
b3deaf57
MD
1320 error = -error;
1321 if (error != -ENOSPC) {
b84de5af
MD
1322 kprintf("hammer_sync_record_callback: sync failed rec "
1323 "%p, error %d\n", record, error);
1324 Debugger("sync failed rec");
b3deaf57 1325 }
c0ade690 1326 }
d36ec43b 1327 hammer_flush_record_done(record, error);
b3deaf57 1328 return(error);
c0ade690
MD
1329}
1330
1331/*
1332 * XXX error handling
1333 */
1334int
1f07f686 1335hammer_sync_inode(hammer_inode_t ip)
c0ade690
MD
1336{
1337 struct hammer_transaction trans;
4e17f465 1338 struct hammer_cursor cursor;
059819e3 1339 struct bio *bio;
1f07f686
MD
1340 hammer_record_t depend;
1341 hammer_record_t next;
ec4e8497 1342 int error, tmp_error;
1f07f686 1343 u_int64_t nlinks;
c0ade690 1344
1f07f686 1345 if ((ip->sync_flags & HAMMER_INODE_MODMASK) == 0)
d113fda1 1346 return(0);
d113fda1 1347
b84de5af 1348 hammer_start_transaction_fls(&trans, ip->hmp);
4e17f465
MD
1349 error = hammer_init_cursor(&trans, &cursor, &ip->cache[0], ip);
1350 if (error)
1351 goto done;
c0ade690 1352
ec4e8497 1353 /*
1f07f686
MD
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.
1357 *
1358 * Records which are in our flush group can be unlinked from our
c4bae5fd
MD
1359 * inode now, potentially allowing the inode to be physically
1360 * deleted.
ec4e8497 1361 */
1f07f686
MD
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) {
c4bae5fd
MD
1368 /*
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
1374 * it gets synced.
1375 *
1376 * If the ADD was not deleted by the frontend we
1377 * can remove the dependancy from our target_list.
1378 */
1379 if (depend->flags & HAMMER_RECF_DELETED_FE) {
1380 ++nlinks;
1381 } else {
1382 TAILQ_REMOVE(&ip->target_list, depend,
1383 target_entry);
1384 depend->target_ip = NULL;
1385 }
1f07f686 1386 } else if ((depend->flags & HAMMER_RECF_DELETED_FE) == 0) {
c4bae5fd
MD
1387 /*
1388 * Not part of our flush group
1389 */
1390 KKASSERT((depend->flags & HAMMER_RECF_DELETED_BE) == 0);
1f07f686
MD
1391 switch(depend->type) {
1392 case HAMMER_MEM_RECORD_ADD:
1393 --nlinks;
1394 break;
1395 case HAMMER_MEM_RECORD_DEL:
1396 ++nlinks;
1397 break;
e8599db1
MD
1398 default:
1399 break;
1f07f686 1400 }
ec4e8497 1401 }
ec4e8497
MD
1402 }
1403
c0ade690 1404 /*
1f07f686 1405 * Set dirty if we had to modify the link count.
c0ade690 1406 */
1f07f686
MD
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;
1411 }
b84de5af 1412
4e17f465 1413 /*
e8599db1
MD
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.
4e17f465 1416 */
e8599db1 1417 if (ip->flags & HAMMER_INODE_VHELD)
4e17f465
MD
1418 error = vfsync(ip->vp, MNT_NOWAIT, 1, NULL, NULL);
1419 ip->flags |= HAMMER_INODE_WRITE_ALT;
1420
1421 /*
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
1426 * any data.
1427 *
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).
1431 */
1432 if (ip->flags & HAMMER_INODE_TRUNCATED) {
1433 ip->sync_trunc_off = ip->trunc_off;
1434 ip->sync_flags |= HAMMER_INODE_TRUNCATED;
1435 }
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;
1439 }
1440
1f07f686 1441 /*
869e8f55
MD
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.
1445 *
1446 * We don't flush pending frontend data buffers until after we've
1447 * dealth with the truncation.
1f07f686 1448 *
869e8f55 1449 * Don't bother if the inode is or has been deleted.
1f07f686 1450 */
869e8f55 1451 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
b84de5af
MD
1452 /*
1453 * Interlock trunc_off. The VOP front-end may continue to
1454 * make adjustments to it while we are blocked.
1455 */
1456 off_t trunc_off;
1457 off_t aligned_trunc_off;
c0ade690 1458
b84de5af
MD
1459 trunc_off = ip->sync_trunc_off;
1460 aligned_trunc_off = (trunc_off + HAMMER_BUFMASK) &
1461 ~HAMMER_BUFMASK64;
1462
1463 /*
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.
1469 */
4e17f465 1470 error = hammer_ip_delete_range(&cursor, ip,
b84de5af
MD
1471 aligned_trunc_off,
1472 0x7FFFFFFFFFFFFFFFLL);
1473 if (error)
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;
1479 }
1f07f686
MD
1480 } else {
1481 error = 0;
f3b0f382
MD
1482 }
1483
1f07f686
MD
1484 /*
1485 * Now sync related records. These will typically be directory
1486 * entries or delete-on-disk records.
869e8f55
MD
1487 *
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.
1f07f686
MD
1491 */
1492 if (error == 0) {
1493 tmp_error = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
4e17f465 1494 hammer_sync_record_callback, &cursor);
1f07f686
MD
1495 if (tmp_error < 0)
1496 tmp_error = -error;
1497 if (tmp_error)
1498 error = tmp_error;
869e8f55
MD
1499 if (error == 0)
1500 ip->sync_flags &= ~HAMMER_INODE_XDIRTY;
1f07f686
MD
1501 }
1502
1503 /*
869e8f55
MD
1504 * If we are deleting the inode the frontend had better not have
1505 * any active references on elements making up the inode.
1f07f686 1506 */
869e8f55
MD
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) {
1511 int count1 = 0;
1f07f686 1512
77062c8a 1513 hkprintf("Y");
869e8f55 1514 ip->flags |= HAMMER_INODE_DELETED;
4e17f465 1515 error = hammer_ip_delete_range_all(&cursor, ip, &count1);
869e8f55
MD
1516 if (error == 0) {
1517 ip->sync_flags &= ~HAMMER_INODE_DELETING;
1518 ip->sync_flags &= ~HAMMER_INODE_TRUNCATED;
1519 KKASSERT(RB_EMPTY(&ip->rec_tree));
1f07f686 1520
869e8f55
MD
1521 /*
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.
1525 */
1526 ip->ino_rec.base.base.delete_tid = trans.tid;
1527 ip->sync_ino_rec.base.base.delete_tid = trans.tid;
1f07f686 1528
869e8f55
MD
1529 /*
1530 * Adjust the inode count in the volume header
1531 */
e8599db1
MD
1532 hammer_modify_volume_field(&trans, trans.rootvol,
1533 vol0_stat_inodes);
869e8f55
MD
1534 --ip->hmp->rootvol->ondisk->vol0_stat_inodes;
1535 hammer_modify_volume_done(trans.rootvol);
1536 } else {
1537 ip->flags &= ~HAMMER_INODE_DELETED;
1538 Debugger("hammer_ip_delete_range_all errored");
1539 }
1f07f686 1540 }
b84de5af 1541
059819e3 1542 /*
869e8f55
MD
1543 * Flush any queued BIOs. These will just biodone() the IO's if
1544 * the inode has been deleted.
059819e3
MD
1545 */
1546 while ((bio = TAILQ_FIRST(&ip->bio_list)) != NULL) {
1547 TAILQ_REMOVE(&ip->bio_list, bio, bio_act);
4e17f465 1548 tmp_error = hammer_dowrite(&cursor, ip, bio);
ec4e8497
MD
1549 if (tmp_error)
1550 error = tmp_error;
059819e3 1551 }
b84de5af 1552 ip->sync_flags &= ~HAMMER_INODE_BUFS;
c0ade690 1553
b84de5af
MD
1554 if (error)
1555 Debugger("RB_SCAN errored");
c0ade690
MD
1556
1557 /*
1558 * Now update the inode's on-disk inode-data and/or on-disk record.
b84de5af 1559 * DELETED and ONDISK are managed only in ip->flags.
c0ade690 1560 */
b84de5af 1561 switch(ip->flags & (HAMMER_INODE_DELETED | HAMMER_INODE_ONDISK)) {
c0ade690
MD
1562 case HAMMER_INODE_DELETED|HAMMER_INODE_ONDISK:
1563 /*
1564 * If deleted and on-disk, don't set any additional flags.
1565 * the delete flag takes care of things.
869e8f55
MD
1566 *
1567 * Clear flags which may have been set by the frontend.
c0ade690 1568 */
869e8f55
MD
1569 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
1570 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1571 HAMMER_INODE_DELETING);
c0ade690
MD
1572 break;
1573 case HAMMER_INODE_DELETED:
1574 /*
1575 * Take care of the case where a deleted inode was never
1576 * flushed to the disk in the first place.
869e8f55
MD
1577 *
1578 * Clear flags which may have been set by the frontend.
c0ade690 1579 */
b84de5af 1580 ip->sync_flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
869e8f55
MD
1581 HAMMER_INODE_XDIRTY|HAMMER_INODE_ITIMES|
1582 HAMMER_INODE_DELETING);
d26d0ae9 1583 while (RB_ROOT(&ip->rec_tree)) {
d36ec43b
MD
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;
d36ec43b 1589 hammer_rel_mem_record(record);
d26d0ae9 1590 }
c0ade690
MD
1591 break;
1592 case HAMMER_INODE_ONDISK:
1593 /*
1594 * If already on-disk, do not set any additional flags.
1595 */
1596 break;
1597 default:
1598 /*
1599 * If not on-disk and not deleted, set both dirty flags
b84de5af
MD
1600 * to force an initial record to be written. Also set
1601 * the create_tid for the inode.
1602 *
1603 * Set create_tid in both the frontend and backend
1604 * copy of the inode record.
c0ade690 1605 */
b84de5af
MD
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;
c0ade690
MD
1609 break;
1610 }
1611
1612 /*
d113fda1
MD
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.
1615 *
1616 * If DELETED is set hammer_update_inode() will delete the existing
1617 * record without writing out a new one.
1618 *
1619 * If *ONLY* the ITIMES flag is set we can update the record in-place.
c0ade690 1620 */
b84de5af 1621 if (ip->flags & HAMMER_INODE_DELETED) {
4e17f465 1622 error = hammer_update_inode(&cursor, ip);
b84de5af
MD
1623 } else
1624 if ((ip->sync_flags & (HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY |
1625 HAMMER_INODE_ITIMES)) == HAMMER_INODE_ITIMES) {
4e17f465 1626 error = hammer_update_itimes(&cursor, ip);
d113fda1 1627 } else
b84de5af
MD
1628 if (ip->sync_flags & (HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY |
1629 HAMMER_INODE_ITIMES)) {
4e17f465 1630 error = hammer_update_inode(&cursor, ip);
c0ade690 1631 }
b84de5af
MD
1632 if (error)
1633 Debugger("hammer_update_itimes/inode errored");
4e17f465 1634done:
b84de5af
MD
1635 /*
1636 * Save the TID we used to sync the inode with to make sure we
1637 * do not improperly reuse it.
1638 */
4e17f465 1639 hammer_done_cursor(&cursor);
b84de5af 1640 hammer_done_transaction(&trans);
c0ade690 1641 return(error);
8cd0a023
MD
1642}
1643
1f07f686
MD
1644/*
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.
1648 *
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.
1651 */
3bf2d80a 1652void
e8599db1 1653hammer_inode_unloadable_check(hammer_inode_t ip, int getvp)
1f07f686 1654{
e8599db1
MD
1655 struct vnode *vp;
1656
1f07f686 1657 /*
c4bae5fd
MD
1658 * Set the DELETING flag when the link count drops to 0 and the
1659 * OS no longer has any opens on the inode.
1660 *
1661 * The backend will clear DELETING (a mod flag) and set DELETED
1662 * (a state flag) when it is actually able to perform the
1663 * operation.
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1664 */
1665 if (ip->ino_rec.ino_nlinks == 0 &&
869e8f55 1666 (ip->flags & (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) == 0) {
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MD
1667 ip->flags |= HAMMER_INODE_DELETING;
1668 ip->flags |= HAMMER_INODE_TRUNCATED;
1669 ip->trunc_off = 0;
1670 vp = NULL;
1671 if (getvp) {
1672 if (hammer_get_vnode(ip, &vp) != 0)
1673 return;
1674 }
869e8f55
MD
1675 if (ip->vp) {
1676 vtruncbuf(ip->vp, 0, HAMMER_BUFSIZE);
1677 vnode_pager_setsize(ip->vp, 0);
1678 }
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MD
1679 if (getvp) {
1680 vput(vp);
1681 }
1f07f686 1682 }
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MD
1683}
1684
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MD
1685/*
1686 * Re-test an inode when a dependancy had gone away to see if we
1687 * can chain flush it.
1688 */
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MD
1689void
1690hammer_test_inode(hammer_inode_t ip)
1691{
1692 if (ip->flags & HAMMER_INODE_REFLUSH) {
1693 ip->flags &= ~HAMMER_INODE_REFLUSH;
1694 hammer_ref(&ip->lock);
3bf2d80a
MD
1695 if (ip->flags & HAMMER_INODE_RESIGNAL) {
1696 ip->flags &= ~HAMMER_INODE_RESIGNAL;
1697 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
1698 } else {
1699 hammer_flush_inode(ip, 0);
1700 }
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MD
1701 hammer_rel_inode(ip, 0);
1702 }
1703}
1704