- Factor out if_purgeaddrs_nolink(), which frees all non-link ifaddrs no
[dragonfly.git] / sys / vfs / hammer / hammer_inode.c
CommitLineData
427e5fc6
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1/*
2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
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 *
0b075555 34 * $DragonFly: src/sys/vfs/hammer/hammer_inode.c,v 1.14 2007/12/30 08:49:20 dillon Exp $
427e5fc6
MD
35 */
36
37#include "hammer.h"
38#include <sys/buf.h>
39#include <sys/buf2.h>
40
427e5fc6
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41int
42hammer_vop_inactive(struct vop_inactive_args *ap)
43{
66325755 44 struct hammer_inode *ip = VTOI(ap->a_vp);
27ea2398 45
c0ade690
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46 /*
47 * Degenerate case
48 */
49 if (ip == NULL) {
66325755 50 vrecycle(ap->a_vp);
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51 return(0);
52 }
53
54 /*
55 * If the inode no longer has any references we recover its
56 * in-memory resources immediately.
57 */
58 if (ip->ino_rec.ino_nlinks == 0 &&
59 (ip->hmp->mp->mnt_flag & MNT_RDONLY) == 0) {
60 hammer_sync_inode(ip, MNT_NOWAIT, 1);
61 }
427e5fc6
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62 return(0);
63}
64
65int
66hammer_vop_reclaim(struct vop_reclaim_args *ap)
67{
427e5fc6
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68 struct hammer_inode *ip;
69 struct vnode *vp;
70
71 vp = ap->a_vp;
c0ade690
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72
73 /*
74 * Release the vnode association and ask that the inode be flushed.
75 */
a89aec1b
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76 if ((ip = vp->v_data) != NULL) {
77 vp->v_data = NULL;
78 ip->vp = NULL;
79 hammer_rel_inode(ip, 1);
80 }
427e5fc6
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81 return(0);
82}
83
84/*
66325755
MD
85 * Obtain a vnode for the specified inode number. An exclusively locked
86 * vnode is returned.
427e5fc6
MD
87 */
88int
89hammer_vfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
90{
91 struct hammer_mount *hmp = (void *)mp->mnt_data;
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MD
92 struct hammer_inode *ip;
93 int error;
94
95 /*
96 * Get/allocate the hammer_inode structure. The structure must be
97 * unlocked while we manipulate the related vnode to avoid a
98 * deadlock.
99 */
7f7c1f84 100 ip = hammer_get_inode(hmp, ino, hmp->asof, &error);
66325755
MD
101 if (ip == NULL) {
102 *vpp = NULL;
103 return(error);
104 }
66325755 105 error = hammer_get_vnode(ip, LK_EXCLUSIVE, vpp);
a89aec1b 106 hammer_rel_inode(ip, 0);
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107 return (error);
108}
109
110/*
111 * Return a locked vnode for the specified inode. The inode must be
112 * referenced but NOT LOCKED on entry and will remain referenced on
113 * return.
114 */
115int
116hammer_get_vnode(struct hammer_inode *ip, int lktype, struct vnode **vpp)
117{
118 struct vnode *vp;
119 int error = 0;
120
121 for (;;) {
122 if ((vp = ip->vp) == NULL) {
123 error = getnewvnode(VT_HAMMER, ip->hmp->mp, vpp, 0, 0);
124 if (error)
125 break;
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126 hammer_lock_ex(&ip->lock);
127 if (ip->vp != NULL) {
128 hammer_unlock(&ip->lock);
129 vp->v_type = VBAD;
130 vx_put(vp);
131 continue;
66325755 132 }
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MD
133 hammer_ref(&ip->lock);
134 vp = *vpp;
135 ip->vp = vp;
136 vp->v_type = hammer_get_vnode_type(
137 ip->ino_rec.base.base.obj_type);
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138
139 switch(ip->ino_rec.base.base.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);
145 break;
146 case HAMMER_OBJTYPE_FIFO:
147 vp->v_ops = &ip->hmp->mp->mnt_vn_fifo_ops;
148 break;
149 default:
150 break;
151 }
152 if (ip->obj_id == HAMMER_OBJID_ROOT)
153 vp->v_flag |= VROOT;
154
8cd0a023
MD
155 vp->v_data = (void *)ip;
156 /* vnode locked by getnewvnode() */
157 /* make related vnode dirty if inode dirty? */
158 hammer_unlock(&ip->lock);
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MD
159 if (vp->v_type == VREG)
160 vinitvmio(vp, ip->ino_rec.ino_size);
8cd0a023
MD
161 break;
162 }
163
164 /*
165 * loop if the vget fails (aka races), or if the vp
166 * no longer matches ip->vp.
167 */
168 if (vget(vp, LK_EXCLUSIVE) == 0) {
169 if (vp == ip->vp)
170 break;
171 vput(vp);
66325755
MD
172 }
173 }
a89aec1b 174 *vpp = vp;
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175 return(error);
176}
177
178/*
8cd0a023
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179 * Acquire a HAMMER inode. The returned inode is not locked. These functions
180 * do not attach or detach the related vnode (use hammer_get_vnode() for
181 * that).
66325755
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182 */
183struct hammer_inode *
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184hammer_get_inode(struct hammer_mount *hmp, u_int64_t obj_id, hammer_tid_t asof,
185 int *errorp)
66325755 186{
427e5fc6 187 struct hammer_inode_info iinfo;
8cd0a023 188 struct hammer_cursor cursor;
427e5fc6 189 struct hammer_inode *ip;
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MD
190
191 /*
192 * Determine if we already have an inode cached. If we do then
193 * we are golden.
194 */
66325755 195 iinfo.obj_id = obj_id;
7f7c1f84 196 iinfo.obj_asof = asof;
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197loop:
198 ip = hammer_ino_rb_tree_RB_LOOKUP_INFO(&hmp->rb_inos_root, &iinfo);
199 if (ip) {
8cd0a023 200 hammer_ref(&ip->lock);
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MD
201 *errorp = 0;
202 return(ip);
427e5fc6
MD
203 }
204
427e5fc6 205 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
66325755 206 ip->obj_id = obj_id;
27ea2398 207 ip->obj_asof = iinfo.obj_asof;
66325755 208 ip->hmp = hmp;
8cd0a023 209 RB_INIT(&ip->rec_tree);
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210
211 /*
8cd0a023 212 * Locate the on-disk inode.
427e5fc6
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213 * If we do not have an inode cached search the HAMMER on-disk B-Tree
214 * for it.
215 */
427e5fc6 216
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MD
217 hammer_init_cursor_hmp(&cursor, hmp);
218 cursor.key_beg.obj_id = ip->obj_id;
219 cursor.key_beg.key = 0;
220 cursor.key_beg.create_tid = iinfo.obj_asof;
221 cursor.key_beg.delete_tid = 0;
222 cursor.key_beg.rec_type = HAMMER_RECTYPE_INODE;
223 cursor.key_beg.obj_type = 0;
a89aec1b 224 cursor.flags = HAMMER_CURSOR_GET_RECORD | HAMMER_CURSOR_GET_DATA;
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225
226 *errorp = hammer_btree_lookup(&cursor);
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227
228 /*
229 * On success the B-Tree lookup will hold the appropriate
230 * buffer cache buffers and provide a pointer to the requested
231 * information. Copy the information to the in-memory inode.
232 */
66325755 233 if (*errorp == 0) {
8cd0a023
MD
234 ip->ino_rec = cursor.record->inode;
235 ip->ino_data = cursor.data->inode;
0b075555
MD
236 } else if (cursor.node) {
237 hammer_cache_node(cursor.node, &ip->cache);
427e5fc6 238 }
8cd0a023 239 hammer_done_cursor(&cursor);
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240
241 /*
242 * On success load the inode's record and data and insert the
243 * inode into the B-Tree. It is possible to race another lookup
244 * insertion of the same inode so deal with that condition too.
245 */
66325755 246 if (*errorp == 0) {
8cd0a023 247 hammer_ref(&ip->lock);
427e5fc6 248 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
8cd0a023
MD
249 hammer_uncache_node(&ip->cache);
250 hammer_unref(&ip->lock);
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251 kfree(ip, M_HAMMER);
252 goto loop;
253 }
c0ade690 254 ip->flags |= HAMMER_INODE_ONDISK;
427e5fc6 255 } else {
66325755
MD
256 kfree(ip, M_HAMMER);
257 ip = NULL;
427e5fc6 258 }
66325755
MD
259 return (ip);
260}
261
8cd0a023
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262/*
263 * Create a new filesystem object, returning the inode in *ipp. The
264 * returned inode will be referenced but not locked.
265 *
266 * The inode is created in-memory and will be delay-synchronized to the
267 * disk.
268 */
269int
a89aec1b
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270hammer_create_inode(hammer_transaction_t trans, struct vattr *vap,
271 struct ucred *cred, hammer_inode_t dip,
8cd0a023 272 struct hammer_inode **ipp)
66325755 273{
a89aec1b
MD
274 hammer_mount_t hmp;
275 hammer_inode_t ip;
6b4f890b 276 uid_t xuid;
66325755 277
8cd0a023
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278 hmp = trans->hmp;
279 ip = kmalloc(sizeof(*ip), M_HAMMER, M_WAITOK|M_ZERO);
a89aec1b 280 ip->obj_id = hammer_alloc_tid(trans);
8cd0a023 281 KKASSERT(ip->obj_id != 0);
7f7c1f84 282 ip->obj_asof = hmp->asof;
8cd0a023
MD
283 ip->hmp = hmp;
284 ip->flags = HAMMER_INODE_DDIRTY | HAMMER_INODE_RDIRTY |
285 HAMMER_INODE_ITIMES;
286 ip->last_tid = trans->tid;
287
288 RB_INIT(&ip->rec_tree);
289
290 ip->ino_rec.ino_atime = trans->tid;
291 ip->ino_rec.ino_mtime = trans->tid;
292 ip->ino_rec.ino_size = 0;
293 ip->ino_rec.ino_nlinks = 0;
294 /* XXX */
a89aec1b 295 ip->ino_rec.base.rec_id = hammer_alloc_recid(trans);
8cd0a023
MD
296 KKASSERT(ip->ino_rec.base.rec_id != 0);
297 ip->ino_rec.base.base.obj_id = ip->obj_id;
298 ip->ino_rec.base.base.key = 0;
299 ip->ino_rec.base.base.create_tid = trans->tid;
300 ip->ino_rec.base.base.delete_tid = 0;
301 ip->ino_rec.base.base.rec_type = HAMMER_RECTYPE_INODE;
302 ip->ino_rec.base.base.obj_type = hammer_get_obj_type(vap->va_type);
303
304 ip->ino_data.version = HAMMER_INODE_DATA_VERSION;
305 ip->ino_data.mode = vap->va_mode;
306 ip->ino_data.ctime = trans->tid;
307 ip->ino_data.parent_obj_id = (dip) ? dip->ino_rec.base.base.obj_id : 0;
6b4f890b 308
7a04d74f
MD
309 switch(ip->ino_rec.base.base.obj_type) {
310 case HAMMER_OBJTYPE_CDEV:
311 case HAMMER_OBJTYPE_BDEV:
312 ip->ino_data.rmajor = vap->va_rmajor;
313 ip->ino_data.rminor = vap->va_rminor;
314 break;
315 default:
316 break;
317 }
318
6b4f890b
MD
319 /*
320 * Calculate default uid/gid and overwrite with information from
321 * the vap.
322 */
323 xuid = hammer_to_unix_xid(&dip->ino_data.uid);
324 ip->ino_data.gid = dip->ino_data.gid;
325 xuid = vop_helper_create_uid(hmp->mp, dip->ino_data.mode, xuid, cred,
326 &vap->va_mode);
327 ip->ino_data.mode = vap->va_mode;
328
8cd0a023
MD
329 if (vap->va_vaflags & VA_UID_UUID_VALID)
330 ip->ino_data.uid = vap->va_uid_uuid;
6b4f890b
MD
331 else if (vap->va_uid != (uid_t)VNOVAL)
332 hammer_guid_to_uuid(&ip->ino_data.uid, xuid);
8cd0a023
MD
333 if (vap->va_vaflags & VA_GID_UUID_VALID)
334 ip->ino_data.gid = vap->va_gid_uuid;
6b4f890b 335 else if (vap->va_gid != (gid_t)VNOVAL)
8cd0a023
MD
336 hammer_guid_to_uuid(&ip->ino_data.gid, vap->va_gid);
337
338 hammer_ref(&ip->lock);
339 if (RB_INSERT(hammer_ino_rb_tree, &hmp->rb_inos_root, ip)) {
340 hammer_unref(&ip->lock);
a89aec1b 341 panic("hammer_create_inode: duplicate obj_id %llx", ip->obj_id);
8cd0a023
MD
342 }
343 *ipp = ip;
344 return(0);
66325755
MD
345}
346
c0ade690 347int
7f7c1f84 348hammer_update_inode(hammer_inode_t ip)
c0ade690
MD
349{
350 struct hammer_cursor cursor;
d26d0ae9 351 struct hammer_cursor *spike = NULL;
c0ade690
MD
352 hammer_record_t record;
353 int error;
354
355 /*
76376933 356 * Locate the record on-disk and mark it as deleted. Both the B-Tree
195c19a1
MD
357 * node and the record must be marked deleted. The record may or
358 * may not be physically deleted, depending on the retention policy.
76376933 359 *
195c19a1
MD
360 * If the inode has already been deleted on-disk we have nothing
361 * to do.
c0ade690
MD
362 *
363 * XXX Update the inode record and data in-place if the retention
364 * policy allows it.
365 */
d26d0ae9 366retry:
c0ade690
MD
367 error = 0;
368
76376933
MD
369 if ((ip->flags & (HAMMER_INODE_ONDISK|HAMMER_INODE_DELONDISK)) ==
370 HAMMER_INODE_ONDISK) {
c0ade690
MD
371 hammer_init_cursor_ip(&cursor, ip);
372 cursor.key_beg.obj_id = ip->obj_id;
373 cursor.key_beg.key = 0;
374 cursor.key_beg.create_tid = ip->obj_asof;
375 cursor.key_beg.delete_tid = 0;
376 cursor.key_beg.rec_type = HAMMER_RECTYPE_INODE;
377 cursor.key_beg.obj_type = 0;
378 cursor.flags = HAMMER_CURSOR_GET_RECORD;
379
380 error = hammer_btree_lookup(&cursor);
381
382 if (error == 0) {
195c19a1
MD
383 error = hammer_ip_delete_record(&cursor, ip->last_tid);
384 if (error == 0)
385 ip->flags |= HAMMER_INODE_DELONDISK;
c0ade690
MD
386 }
387 hammer_cache_node(cursor.node, &ip->cache);
388 hammer_done_cursor(&cursor);
389 }
390
391 /*
392 * Write out a new record if the in-memory inode is not marked
fbc6e32a
MD
393 * as having been deleted. Update our inode statistics if this
394 * is the first application of the inode on-disk.
76376933
MD
395 *
396 * If the inode has been deleted permanently, HAMMER_INODE_DELONDISK
397 * will remain set and prevent further updates.
c0ade690
MD
398 */
399 if (error == 0 && (ip->flags & HAMMER_INODE_DELETED) == 0) {
7f7c1f84 400 record = hammer_alloc_mem_record(ip);
c0ade690 401 record->rec.inode = ip->ino_rec;
7f7c1f84 402 record->rec.inode.base.base.create_tid = ip->last_tid;
c0ade690
MD
403 record->rec.inode.base.data_len = sizeof(ip->ino_data);
404 record->data = (void *)&ip->ino_data;
d26d0ae9
MD
405 error = hammer_ip_sync_record(record, &spike);
406 hammer_drop_mem_record(record, 1);
407 if (error == ENOSPC) {
408 error = hammer_spike(&spike);
409 if (error == 0)
410 goto retry;
411 }
412 KKASSERT(spike == NULL);
413 if (error == 0) {
414 ip->flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY|
415 HAMMER_INODE_DELONDISK);
416 if ((ip->flags & HAMMER_INODE_ONDISK) == 0) {
d26d0ae9 417 hammer_modify_volume(ip->hmp->rootvol);
0b075555
MD
418 ++ip->hmp->rootvol->ondisk->vol0_stat_inodes;
419 hammer_modify_volume_done(ip->hmp->rootvol);
d26d0ae9
MD
420 ip->flags |= HAMMER_INODE_ONDISK;
421 }
fbc6e32a 422 }
c0ade690 423 }
d26d0ae9
MD
424 if (error == 0)
425 ip->flags &= ~HAMMER_INODE_TID;
c0ade690
MD
426 return(error);
427}
428
a89aec1b 429/*
6b4f890b 430 * Release a reference on an inode and unload it if told to flush.
a89aec1b 431 */
66325755 432void
a89aec1b 433hammer_rel_inode(struct hammer_inode *ip, int flush)
66325755
MD
434{
435 hammer_unref(&ip->lock);
6b4f890b 436 if (flush || ip->ino_rec.ino_nlinks == 0)
a89aec1b
MD
437 ip->flags |= HAMMER_INODE_FLUSH;
438 if (ip->lock.refs == 0 && (ip->flags & HAMMER_INODE_FLUSH))
439 hammer_unload_inode(ip, NULL);
427e5fc6
MD
440}
441
27ea2398 442/*
8cd0a023
MD
443 * Unload and destroy the specified inode.
444 *
27ea2398
MD
445 * (called via RB_SCAN)
446 */
447int
66325755 448hammer_unload_inode(struct hammer_inode *ip, void *data __unused)
27ea2398 449{
c0ade690
MD
450 int error;
451
a89aec1b
MD
452 KASSERT(ip->lock.refs == 0,
453 ("hammer_unload_inode: %d refs\n", ip->lock.refs));
8cd0a023
MD
454 KKASSERT(ip->vp == NULL);
455 hammer_ref(&ip->lock);
6b4f890b 456
c0ade690
MD
457 error = hammer_sync_inode(ip, MNT_WAIT, 1);
458 if (error)
459 kprintf("hammer_sync_inode failed error %d\n", error);
6b4f890b 460
66325755 461 RB_REMOVE(hammer_ino_rb_tree, &ip->hmp->rb_inos_root, ip);
8cd0a023
MD
462
463 hammer_uncache_node(&ip->cache);
27ea2398
MD
464 kfree(ip, M_HAMMER);
465 return(0);
466}
467
427e5fc6 468/*
66325755
MD
469 * A transaction has modified an inode, requiring a new record and possibly
470 * also data to be written out.
7f7c1f84
MD
471 *
472 * last_tid is the TID to use for the disk sync.
427e5fc6 473 */
66325755
MD
474void
475hammer_modify_inode(struct hammer_transaction *trans,
476 struct hammer_inode *ip, int flags)
427e5fc6 477{
7f7c1f84 478 if ((flags & HAMMER_INODE_TID) && (ip->flags & HAMMER_INODE_TID) == 0) {
c0ade690 479 ip->last_tid = trans->tid;
7f7c1f84
MD
480 }
481 ip->flags |= flags;
c0ade690
MD
482}
483
484/*
485 * Sync any dirty buffers and records associated with an inode. The
486 * inode's last_tid field is used as the transaction id for the sync,
487 * overriding any intermediate TIDs that were used for records. Note
488 * that the dirty buffer cache buffers do not have any knowledge of
489 * the transaction id they were modified under.
d26d0ae9
MD
490 *
491 * If we can't sync due to a cluster becoming full the spike structure
492 * will be filled in and ENOSPC returned. We must return -ENOSPC to
493 * terminate the RB_SCAN.
c0ade690
MD
494 */
495static int
d26d0ae9 496hammer_sync_inode_callback(hammer_record_t rec, void *data)
c0ade690 497{
d26d0ae9 498 struct hammer_cursor **spike = data;
c0ade690
MD
499 int error;
500
d26d0ae9
MD
501 hammer_ref(&rec->lock);
502 hammer_lock_ex(&rec->lock);
c0ade690 503 if ((rec->flags & HAMMER_RECF_DELETED) == 0)
d26d0ae9
MD
504 error = hammer_ip_sync_record(rec, spike);
505 else
506 error = 0;
507
508 if (error == ENOSPC) {
509 hammer_drop_mem_record(rec, 0);
510 return(-error);
511 }
c0ade690
MD
512
513 if (error) {
0b075555
MD
514 kprintf("hammer_sync_inode_callback: sync failed rec %p, error %d\n",
515 rec, error);
d26d0ae9
MD
516 hammer_drop_mem_record(rec, 0);
517 return(-error);
c0ade690 518 }
d26d0ae9 519 hammer_drop_mem_record(rec, 1); /* ref & lock eaten by call */
c0ade690
MD
520 return(0);
521}
522
523/*
524 * XXX error handling
525 */
526int
527hammer_sync_inode(hammer_inode_t ip, int waitfor, int handle_delete)
528{
529 struct hammer_transaction trans;
d26d0ae9 530 struct hammer_cursor *spike = NULL;
c0ade690 531 int error;
c0ade690
MD
532
533 hammer_lock_ex(&ip->lock);
534 hammer_start_transaction(&trans, ip->hmp);
535
536 /*
537 * If the inode has been deleted (nlinks == 0), and the OS no longer
538 * has any references to it (handle_delete != 0), clean up in-memory
539 * data.
540 *
541 * NOTE: We do not set the RDIRTY flag when updating the delete_tid,
542 * setting HAMMER_INODE_DELETED takes care of it.
7f7c1f84
MD
543 *
544 * NOTE: Because we may sync records within this new transaction,
545 * force the inode update later on to use our transaction id or
546 * the delete_tid of the inode may be less then the create_tid of
547 * the inode update. XXX shouldn't happen but don't take the chance.
d26d0ae9
MD
548 *
549 * NOTE: The call to hammer_ip_delete_range() cannot return ENOSPC
550 * so we can pass a NULL spike structure, because no partial data
551 * deletion can occur (yet).
c0ade690
MD
552 */
553 if (ip->ino_rec.ino_nlinks == 0 && handle_delete) {
554 if (ip->vp)
555 vtruncbuf(ip->vp, 0, HAMMER_BUFSIZE);
7a04d74f 556 error = hammer_ip_delete_range_all(&trans, ip);
c0ade690 557 KKASSERT(RB_EMPTY(&ip->rec_tree));
7f7c1f84 558 ip->flags &= ~HAMMER_INODE_TID;
c0ade690
MD
559 ip->ino_rec.base.base.delete_tid = trans.tid;
560 hammer_modify_inode(&trans, ip,
561 HAMMER_INODE_DELETED | HAMMER_INODE_TID);
fbc6e32a 562 hammer_modify_volume(ip->hmp->rootvol);
0b075555
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563 --ip->hmp->rootvol->ondisk->vol0_stat_inodes;
564 hammer_modify_volume_done(ip->hmp->rootvol);
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565 }
566
567 /*
568 * Sync the buffer cache
569 */
570 if (ip->vp != NULL)
571 error = vfsync(ip->vp, waitfor, 1, NULL, NULL);
572 else
573 error = 0;
574
575 /*
576 * Now sync related records
577 */
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578 for (;;) {
579 error = RB_SCAN(hammer_rec_rb_tree, &ip->rec_tree, NULL,
580 hammer_sync_inode_callback, &spike);
581 KKASSERT(error <= 0);
582 if (error < 0)
583 error = -error;
584 if (error == ENOSPC) {
585 error = hammer_spike(&spike);
586 if (error == 0)
587 continue;
588 }
589 break;
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590 }
591
592 /*
593 * Now update the inode's on-disk inode-data and/or on-disk record.
594 */
595 switch(ip->flags & (HAMMER_INODE_DELETED|HAMMER_INODE_ONDISK)) {
596 case HAMMER_INODE_DELETED|HAMMER_INODE_ONDISK:
597 /*
598 * If deleted and on-disk, don't set any additional flags.
599 * the delete flag takes care of things.
600 */
601 break;
602 case HAMMER_INODE_DELETED:
603 /*
604 * Take care of the case where a deleted inode was never
605 * flushed to the disk in the first place.
606 */
607 ip->flags &= ~(HAMMER_INODE_RDIRTY|HAMMER_INODE_DDIRTY);
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608 while (RB_ROOT(&ip->rec_tree)) {
609 hammer_record_t rec = RB_ROOT(&ip->rec_tree);
610 hammer_ref(&rec->lock);
611 hammer_lock_ex(&rec->lock);
612 hammer_drop_mem_record(rec, 1);
613 }
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614 break;
615 case HAMMER_INODE_ONDISK:
616 /*
617 * If already on-disk, do not set any additional flags.
618 */
619 break;
620 default:
621 /*
622 * If not on-disk and not deleted, set both dirty flags
623 * to force an initial record to be written.
624 */
625 ip->flags |= HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY;
626 break;
627 }
628
629 /*
630 * If RDIRTY or DDIRTY is set, write out a new record. If the
631 * inode is already on-disk, the old record is marked as deleted.
632 */
633 if (ip->flags & (HAMMER_INODE_RDIRTY | HAMMER_INODE_DDIRTY |
634 HAMMER_INODE_DELETED)) {
7f7c1f84 635 error = hammer_update_inode(ip);
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636 }
637 hammer_commit_transaction(&trans);
638 hammer_unlock(&ip->lock);
639 return(error);
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640}
641
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642/*
643 * Access the filesystem buffer containing the cluster-relative byte
644 * offset, validate the buffer type, load *bufferp and return a
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645 * pointer to the requested data. The buffer is reference and locked on
646 * return.
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647 *
648 * If buf_type is 0 the buffer is assumed to be a pure-data buffer and
649 * no type or crc check is performed.
650 *
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651 * If *bufferp is not NULL on entry it is assumed to contain a locked
652 * and referenced buffer which will then be replaced.
653 *
654 * If the caller is holding another unrelated buffer locked it must be
655 * passed in reorderbuf so we can properly order buffer locks.
656 *
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657 * XXX add a flag for the buffer type and check the CRC here XXX
658 */
659void *
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660hammer_bread(hammer_cluster_t cluster, int32_t cloff,
661 u_int64_t buf_type, int *errorp,
662 struct hammer_buffer **bufferp)
427e5fc6 663{
8cd0a023 664 hammer_buffer_t buffer;
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665 int32_t buf_no;
666 int32_t buf_off;
667
668 /*
669 * Load the correct filesystem buffer, replacing *bufferp.
670 */
671 buf_no = cloff / HAMMER_BUFSIZE;
672 buffer = *bufferp;
673 if (buffer == NULL || buffer->cluster != cluster ||
674 buffer->buf_no != buf_no) {
8cd0a023 675 if (buffer) {
c0ade690 676 /*hammer_unlock(&buffer->io.lock);*/
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677 hammer_rel_buffer(buffer, 0);
678 }
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679 buffer = hammer_get_buffer(cluster, buf_no, 0, errorp);
680 *bufferp = buffer;
681 if (buffer == NULL)
682 return(NULL);
c0ade690 683 /*hammer_lock_ex(&buffer->io.lock);*/
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684 }
685
686 /*
8cd0a023 687 * Validate the buffer type
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688 */
689 buf_off = cloff & HAMMER_BUFMASK;
690 if (buf_type) {
691 if (buf_type != buffer->ondisk->head.buf_type) {
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692 kprintf("BUFFER HEAD TYPE MISMATCH %llx %llx\n",
693 buf_type, buffer->ondisk->head.buf_type);
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694 *errorp = EIO;
695 return(NULL);
696 }
697 if (buf_off < sizeof(buffer->ondisk->head)) {
27ea2398 698 kprintf("BUFFER OFFSET TOO LOW %d\n", buf_off);
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699 *errorp = EIO;
700 return(NULL);
701 }
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702 }
703
704 /*
705 * Return a pointer to the buffer data.
706 */
707 *errorp = 0;
708 return((char *)buffer->ondisk + buf_off);
709}
710