1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * localalloc.c
5 *
6 * Node local data allocation
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #include <linux/fs.h>
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/bitops.h>
31
32 #include <cluster/masklog.h>
33
34 #include "ocfs2.h"
35
36 #include "alloc.h"
37 #include "blockcheck.h"
38 #include "dlmglue.h"
39 #include "inode.h"
40 #include "journal.h"
41 #include "localalloc.h"
42 #include "suballoc.h"
43 #include "super.h"
44 #include "sysfile.h"
45 #include "ocfs2_trace.h"
46
47 #include "buffer_head_io.h"
48
49 #define OCFS2_LOCAL_ALLOC(dinode) (&((dinode)->id2.i_lab))
50
51 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc);
52
53 static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
54 struct ocfs2_dinode *alloc,
55 u32 *numbits,
56 struct ocfs2_alloc_reservation *resv);
57
58 static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc);
59
60 static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
61 handle_t *handle,
62 struct ocfs2_dinode *alloc,
63 struct inode *main_bm_inode,
64 struct buffer_head *main_bm_bh);
65
66 static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb,
67 struct ocfs2_alloc_context **ac,
68 struct inode **bitmap_inode,
69 struct buffer_head **bitmap_bh);
70
71 static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb,
72 handle_t *handle,
73 struct ocfs2_alloc_context *ac);
74
75 static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
76 struct inode *local_alloc_inode);
77
78 /*
79 * ocfs2_la_default_mb() - determine a default size, in megabytes of
80 * the local alloc.
81 *
82 * Generally, we'd like to pick as large a local alloc as
83 * possible. Performance on large workloads tends to scale
84 * proportionally to la size. In addition to that, the reservations
85 * code functions more efficiently as it can reserve more windows for
86 * write.
87 *
88 * Some things work against us when trying to choose a large local alloc:
89 *
90 * - We need to ensure our sizing is picked to leave enough space in
91 * group descriptors for other allocations (such as block groups,
92 * etc). Picking default sizes which are a multiple of 4 could help
93 * - block groups are allocated in 2mb and 4mb chunks.
94 *
95 * - Likewise, we don't want to starve other nodes of bits on small
96 * file systems. This can easily be taken care of by limiting our
97 * default to a reasonable size (256M) on larger cluster sizes.
98 *
99 * - Some file systems can't support very large sizes - 4k and 8k in
100 * particular are limited to less than 128 and 256 megabytes respectively.
101 *
102 * The following reference table shows group descriptor and local
103 * alloc maximums at various cluster sizes (4k blocksize)
104 *
105 * csize: 4K group: 126M la: 121M
106 * csize: 8K group: 252M la: 243M
107 * csize: 16K group: 504M la: 486M
108 * csize: 32K group: 1008M la: 972M
109 * csize: 64K group: 2016M la: 1944M
110 * csize: 128K group: 4032M la: 3888M
111 * csize: 256K group: 8064M la: 7776M
112 * csize: 512K group: 16128M la: 15552M
113 * csize: 1024K group: 32256M la: 31104M
114 */
115 #define OCFS2_LA_MAX_DEFAULT_MB 256
116 #define OCFS2_LA_OLD_DEFAULT 8
ocfs2_la_default_mb(struct ocfs2_super * osb)117 unsigned int ocfs2_la_default_mb(struct ocfs2_super *osb)
118 {
119 unsigned int la_mb;
120 unsigned int gd_mb;
121 unsigned int la_max_mb;
122 unsigned int megs_per_slot;
123 struct super_block *sb = osb->sb;
124
125 gd_mb = ocfs2_clusters_to_megabytes(osb->sb,
126 8 * ocfs2_group_bitmap_size(sb, 0, osb->s_feature_incompat));
127
128 /*
129 * This takes care of files systems with very small group
130 * descriptors - 512 byte blocksize at cluster sizes lower
131 * than 16K and also 1k blocksize with 4k cluster size.
132 */
133 if ((sb->s_blocksize == 512 && osb->s_clustersize <= 8192)
134 || (sb->s_blocksize == 1024 && osb->s_clustersize == 4096))
135 return OCFS2_LA_OLD_DEFAULT;
136
137 /*
138 * Leave enough room for some block groups and make the final
139 * value we work from a multiple of 4.
140 */
141 gd_mb -= 16;
142 gd_mb &= 0xFFFFFFFB;
143
144 la_mb = gd_mb;
145
146 /*
147 * Keep window sizes down to a reasonable default
148 */
149 if (la_mb > OCFS2_LA_MAX_DEFAULT_MB) {
150 /*
151 * Some clustersize / blocksize combinations will have
152 * given us a larger than OCFS2_LA_MAX_DEFAULT_MB
153 * default size, but get poor distribution when
154 * limited to exactly 256 megabytes.
155 *
156 * As an example, 16K clustersize at 4K blocksize
157 * gives us a cluster group size of 504M. Paring the
158 * local alloc size down to 256 however, would give us
159 * only one window and around 200MB left in the
160 * cluster group. Instead, find the first size below
161 * 256 which would give us an even distribution.
162 *
163 * Larger cluster group sizes actually work out pretty
164 * well when pared to 256, so we don't have to do this
165 * for any group that fits more than two
166 * OCFS2_LA_MAX_DEFAULT_MB windows.
167 */
168 if (gd_mb > (2 * OCFS2_LA_MAX_DEFAULT_MB))
169 la_mb = 256;
170 else {
171 unsigned int gd_mult = gd_mb;
172
173 while (gd_mult > 256)
174 gd_mult = gd_mult >> 1;
175
176 la_mb = gd_mult;
177 }
178 }
179
180 megs_per_slot = osb->osb_clusters_at_boot / osb->max_slots;
181 megs_per_slot = ocfs2_clusters_to_megabytes(osb->sb, megs_per_slot);
182 /* Too many nodes, too few disk clusters. */
183 if (megs_per_slot < la_mb)
184 la_mb = megs_per_slot;
185
186 /* We can't store more bits than we can in a block. */
187 la_max_mb = ocfs2_clusters_to_megabytes(osb->sb,
188 ocfs2_local_alloc_size(sb) * 8);
189 if (la_mb > la_max_mb)
190 la_mb = la_max_mb;
191
192 return la_mb;
193 }
194
ocfs2_la_set_sizes(struct ocfs2_super * osb,int requested_mb)195 void ocfs2_la_set_sizes(struct ocfs2_super *osb, int requested_mb)
196 {
197 struct super_block *sb = osb->sb;
198 unsigned int la_default_mb = ocfs2_la_default_mb(osb);
199 unsigned int la_max_mb;
200
201 la_max_mb = ocfs2_clusters_to_megabytes(sb,
202 ocfs2_local_alloc_size(sb) * 8);
203
204 trace_ocfs2_la_set_sizes(requested_mb, la_max_mb, la_default_mb);
205
206 if (requested_mb == -1) {
207 /* No user request - use defaults */
208 osb->local_alloc_default_bits =
209 ocfs2_megabytes_to_clusters(sb, la_default_mb);
210 } else if (requested_mb > la_max_mb) {
211 /* Request is too big, we give the maximum available */
212 osb->local_alloc_default_bits =
213 ocfs2_megabytes_to_clusters(sb, la_max_mb);
214 } else {
215 osb->local_alloc_default_bits =
216 ocfs2_megabytes_to_clusters(sb, requested_mb);
217 }
218
219 osb->local_alloc_bits = osb->local_alloc_default_bits;
220 }
221
ocfs2_la_state_enabled(struct ocfs2_super * osb)222 static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb)
223 {
224 return (osb->local_alloc_state == OCFS2_LA_THROTTLED ||
225 osb->local_alloc_state == OCFS2_LA_ENABLED);
226 }
227
ocfs2_local_alloc_seen_free_bits(struct ocfs2_super * osb,unsigned int num_clusters)228 void ocfs2_local_alloc_seen_free_bits(struct ocfs2_super *osb,
229 unsigned int num_clusters)
230 {
231 spin_lock(&osb->osb_lock);
232 if (osb->local_alloc_state == OCFS2_LA_DISABLED ||
233 osb->local_alloc_state == OCFS2_LA_THROTTLED)
234 if (num_clusters >= osb->local_alloc_default_bits) {
235 cancel_delayed_work(&osb->la_enable_wq);
236 osb->local_alloc_state = OCFS2_LA_ENABLED;
237 }
238 spin_unlock(&osb->osb_lock);
239 }
240
ocfs2_la_enable_worker(struct work_struct * work)241 void ocfs2_la_enable_worker(struct work_struct *work)
242 {
243 struct ocfs2_super *osb =
244 container_of(work, struct ocfs2_super,
245 la_enable_wq.work);
246 spin_lock(&osb->osb_lock);
247 osb->local_alloc_state = OCFS2_LA_ENABLED;
248 spin_unlock(&osb->osb_lock);
249 }
250
251 /*
252 * Tell us whether a given allocation should use the local alloc
253 * file. Otherwise, it has to go to the main bitmap.
254 *
255 * This function does semi-dirty reads of local alloc size and state!
256 * This is ok however, as the values are re-checked once under mutex.
257 */
ocfs2_alloc_should_use_local(struct ocfs2_super * osb,u64 bits)258 int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits)
259 {
260 int ret = 0;
261 int la_bits;
262
263 spin_lock(&osb->osb_lock);
264 la_bits = osb->local_alloc_bits;
265
266 if (!ocfs2_la_state_enabled(osb))
267 goto bail;
268
269 /* la_bits should be at least twice the size (in clusters) of
270 * a new block group. We want to be sure block group
271 * allocations go through the local alloc, so allow an
272 * allocation to take up to half the bitmap. */
273 if (bits > (la_bits / 2))
274 goto bail;
275
276 ret = 1;
277 bail:
278 trace_ocfs2_alloc_should_use_local(
279 (unsigned long long)bits, osb->local_alloc_state, la_bits, ret);
280 spin_unlock(&osb->osb_lock);
281 return ret;
282 }
283
ocfs2_load_local_alloc(struct ocfs2_super * osb)284 int ocfs2_load_local_alloc(struct ocfs2_super *osb)
285 {
286 int status = 0;
287 struct ocfs2_dinode *alloc = NULL;
288 struct buffer_head *alloc_bh = NULL;
289 u32 num_used;
290 struct inode *inode = NULL;
291 struct ocfs2_local_alloc *la;
292
293 if (osb->local_alloc_bits == 0)
294 goto bail;
295
296 if (osb->local_alloc_bits >= osb->bitmap_cpg) {
297 mlog(ML_NOTICE, "Requested local alloc window %d is larger "
298 "than max possible %u. Using defaults.\n",
299 osb->local_alloc_bits, (osb->bitmap_cpg - 1));
300 osb->local_alloc_bits =
301 ocfs2_megabytes_to_clusters(osb->sb,
302 ocfs2_la_default_mb(osb));
303 }
304
305 /* read the alloc off disk */
306 inode = ocfs2_get_system_file_inode(osb, LOCAL_ALLOC_SYSTEM_INODE,
307 osb->slot_num);
308 if (!inode) {
309 status = -EINVAL;
310 mlog_errno(status);
311 goto bail;
312 }
313
314 status = ocfs2_read_inode_block_full(inode, &alloc_bh,
315 OCFS2_BH_IGNORE_CACHE);
316 if (status < 0) {
317 mlog_errno(status);
318 goto bail;
319 }
320
321 alloc = (struct ocfs2_dinode *) alloc_bh->b_data;
322 la = OCFS2_LOCAL_ALLOC(alloc);
323
324 if (!(le32_to_cpu(alloc->i_flags) &
325 (OCFS2_LOCAL_ALLOC_FL|OCFS2_BITMAP_FL))) {
326 mlog(ML_ERROR, "Invalid local alloc inode, %llu\n",
327 (unsigned long long)OCFS2_I(inode)->ip_blkno);
328 status = -EINVAL;
329 goto bail;
330 }
331
332 if ((la->la_size == 0) ||
333 (le16_to_cpu(la->la_size) > ocfs2_local_alloc_size(inode->i_sb))) {
334 mlog(ML_ERROR, "Local alloc size is invalid (la_size = %u)\n",
335 le16_to_cpu(la->la_size));
336 status = -EINVAL;
337 goto bail;
338 }
339
340 /* do a little verification. */
341 num_used = ocfs2_local_alloc_count_bits(alloc);
342
343 /* hopefully the local alloc has always been recovered before
344 * we load it. */
345 if (num_used
346 || alloc->id1.bitmap1.i_used
347 || alloc->id1.bitmap1.i_total
348 || la->la_bm_off) {
349 mlog(ML_ERROR, "inconsistent detected, clean journal with"
350 " unrecovered local alloc, please run fsck.ocfs2!\n"
351 "found = %u, set = %u, taken = %u, off = %u\n",
352 num_used, le32_to_cpu(alloc->id1.bitmap1.i_used),
353 le32_to_cpu(alloc->id1.bitmap1.i_total),
354 OCFS2_LOCAL_ALLOC(alloc)->la_bm_off);
355
356 status = -EINVAL;
357 goto bail;
358 }
359
360 osb->local_alloc_bh = alloc_bh;
361 osb->local_alloc_state = OCFS2_LA_ENABLED;
362
363 bail:
364 if (status < 0)
365 brelse(alloc_bh);
366 iput(inode);
367
368 trace_ocfs2_load_local_alloc(osb->local_alloc_bits);
369
370 if (status)
371 mlog_errno(status);
372 return status;
373 }
374
375 /*
376 * return any unused bits to the bitmap and write out a clean
377 * local_alloc.
378 *
379 * local_alloc_bh is optional. If not passed, we will simply use the
380 * one off osb. If you do pass it however, be warned that it *will* be
381 * returned brelse'd and NULL'd out.*/
ocfs2_shutdown_local_alloc(struct ocfs2_super * osb)382 void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
383 {
384 int status;
385 handle_t *handle;
386 struct inode *local_alloc_inode = NULL;
387 struct buffer_head *bh = NULL;
388 struct buffer_head *main_bm_bh = NULL;
389 struct inode *main_bm_inode = NULL;
390 struct ocfs2_dinode *alloc_copy = NULL;
391 struct ocfs2_dinode *alloc = NULL;
392
393 cancel_delayed_work(&osb->la_enable_wq);
394 if (osb->ocfs2_wq)
395 flush_workqueue(osb->ocfs2_wq);
396
397 if (osb->local_alloc_state == OCFS2_LA_UNUSED)
398 goto out;
399
400 local_alloc_inode =
401 ocfs2_get_system_file_inode(osb,
402 LOCAL_ALLOC_SYSTEM_INODE,
403 osb->slot_num);
404 if (!local_alloc_inode) {
405 status = -ENOENT;
406 mlog_errno(status);
407 goto out;
408 }
409
410 osb->local_alloc_state = OCFS2_LA_DISABLED;
411
412 ocfs2_resmap_uninit(&osb->osb_la_resmap);
413
414 main_bm_inode = ocfs2_get_system_file_inode(osb,
415 GLOBAL_BITMAP_SYSTEM_INODE,
416 OCFS2_INVALID_SLOT);
417 if (!main_bm_inode) {
418 status = -EINVAL;
419 mlog_errno(status);
420 goto out;
421 }
422
423 inode_lock(main_bm_inode);
424
425 status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
426 if (status < 0) {
427 mlog_errno(status);
428 goto out_mutex;
429 }
430
431 /* WINDOW_MOVE_CREDITS is a bit heavy... */
432 handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS);
433 if (IS_ERR(handle)) {
434 mlog_errno(PTR_ERR(handle));
435 handle = NULL;
436 goto out_unlock;
437 }
438
439 bh = osb->local_alloc_bh;
440 alloc = (struct ocfs2_dinode *) bh->b_data;
441
442 alloc_copy = kmalloc(bh->b_size, GFP_NOFS);
443 if (!alloc_copy) {
444 status = -ENOMEM;
445 goto out_commit;
446 }
447 memcpy(alloc_copy, alloc, bh->b_size);
448
449 status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode),
450 bh, OCFS2_JOURNAL_ACCESS_WRITE);
451 if (status < 0) {
452 mlog_errno(status);
453 goto out_commit;
454 }
455
456 ocfs2_clear_local_alloc(alloc);
457 ocfs2_journal_dirty(handle, bh);
458
459 brelse(bh);
460 osb->local_alloc_bh = NULL;
461 osb->local_alloc_state = OCFS2_LA_UNUSED;
462
463 status = ocfs2_sync_local_to_main(osb, handle, alloc_copy,
464 main_bm_inode, main_bm_bh);
465 if (status < 0)
466 mlog_errno(status);
467
468 out_commit:
469 ocfs2_commit_trans(osb, handle);
470
471 out_unlock:
472 brelse(main_bm_bh);
473
474 ocfs2_inode_unlock(main_bm_inode, 1);
475
476 out_mutex:
477 inode_unlock(main_bm_inode);
478 iput(main_bm_inode);
479
480 out:
481 iput(local_alloc_inode);
482
483 kfree(alloc_copy);
484 }
485
486 /*
487 * We want to free the bitmap bits outside of any recovery context as
488 * we'll need a cluster lock to do so, but we must clear the local
489 * alloc before giving up the recovered nodes journal. To solve this,
490 * we kmalloc a copy of the local alloc before it's change for the
491 * caller to process with ocfs2_complete_local_alloc_recovery
492 */
ocfs2_begin_local_alloc_recovery(struct ocfs2_super * osb,int slot_num,struct ocfs2_dinode ** alloc_copy)493 int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb,
494 int slot_num,
495 struct ocfs2_dinode **alloc_copy)
496 {
497 int status = 0;
498 struct buffer_head *alloc_bh = NULL;
499 struct inode *inode = NULL;
500 struct ocfs2_dinode *alloc;
501
502 trace_ocfs2_begin_local_alloc_recovery(slot_num);
503
504 *alloc_copy = NULL;
505
506 inode = ocfs2_get_system_file_inode(osb,
507 LOCAL_ALLOC_SYSTEM_INODE,
508 slot_num);
509 if (!inode) {
510 status = -EINVAL;
511 mlog_errno(status);
512 goto bail;
513 }
514
515 inode_lock(inode);
516
517 status = ocfs2_read_inode_block_full(inode, &alloc_bh,
518 OCFS2_BH_IGNORE_CACHE);
519 if (status < 0) {
520 mlog_errno(status);
521 goto bail;
522 }
523
524 *alloc_copy = kmalloc(alloc_bh->b_size, GFP_KERNEL);
525 if (!(*alloc_copy)) {
526 status = -ENOMEM;
527 goto bail;
528 }
529 memcpy((*alloc_copy), alloc_bh->b_data, alloc_bh->b_size);
530
531 alloc = (struct ocfs2_dinode *) alloc_bh->b_data;
532 ocfs2_clear_local_alloc(alloc);
533
534 ocfs2_compute_meta_ecc(osb->sb, alloc_bh->b_data, &alloc->i_check);
535 status = ocfs2_write_block(osb, alloc_bh, INODE_CACHE(inode));
536 if (status < 0)
537 mlog_errno(status);
538
539 bail:
540 if (status < 0) {
541 kfree(*alloc_copy);
542 *alloc_copy = NULL;
543 }
544
545 brelse(alloc_bh);
546
547 if (inode) {
548 inode_unlock(inode);
549 iput(inode);
550 }
551
552 if (status)
553 mlog_errno(status);
554 return status;
555 }
556
557 /*
558 * Step 2: By now, we've completed the journal recovery, we've stamped
559 * a clean local alloc on disk and dropped the node out of the
560 * recovery map. Dlm locks will no longer stall, so lets clear out the
561 * main bitmap.
562 */
ocfs2_complete_local_alloc_recovery(struct ocfs2_super * osb,struct ocfs2_dinode * alloc)563 int ocfs2_complete_local_alloc_recovery(struct ocfs2_super *osb,
564 struct ocfs2_dinode *alloc)
565 {
566 int status;
567 handle_t *handle;
568 struct buffer_head *main_bm_bh = NULL;
569 struct inode *main_bm_inode;
570
571 main_bm_inode = ocfs2_get_system_file_inode(osb,
572 GLOBAL_BITMAP_SYSTEM_INODE,
573 OCFS2_INVALID_SLOT);
574 if (!main_bm_inode) {
575 status = -EINVAL;
576 mlog_errno(status);
577 goto out;
578 }
579
580 inode_lock(main_bm_inode);
581
582 status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
583 if (status < 0) {
584 mlog_errno(status);
585 goto out_mutex;
586 }
587
588 handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS);
589 if (IS_ERR(handle)) {
590 status = PTR_ERR(handle);
591 handle = NULL;
592 mlog_errno(status);
593 goto out_unlock;
594 }
595
596 /* we want the bitmap change to be recorded on disk asap */
597 handle->h_sync = 1;
598
599 status = ocfs2_sync_local_to_main(osb, handle, alloc,
600 main_bm_inode, main_bm_bh);
601 if (status < 0)
602 mlog_errno(status);
603
604 ocfs2_commit_trans(osb, handle);
605
606 out_unlock:
607 ocfs2_inode_unlock(main_bm_inode, 1);
608
609 out_mutex:
610 inode_unlock(main_bm_inode);
611
612 brelse(main_bm_bh);
613
614 iput(main_bm_inode);
615
616 out:
617 if (!status)
618 ocfs2_init_steal_slots(osb);
619 if (status)
620 mlog_errno(status);
621 return status;
622 }
623
624 /*
625 * make sure we've got at least bits_wanted contiguous bits in the
626 * local alloc. You lose them when you drop i_mutex.
627 *
628 * We will add ourselves to the transaction passed in, but may start
629 * our own in order to shift windows.
630 */
ocfs2_reserve_local_alloc_bits(struct ocfs2_super * osb,u32 bits_wanted,struct ocfs2_alloc_context * ac)631 int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb,
632 u32 bits_wanted,
633 struct ocfs2_alloc_context *ac)
634 {
635 int status;
636 struct ocfs2_dinode *alloc;
637 struct inode *local_alloc_inode;
638 unsigned int free_bits;
639
640 BUG_ON(!ac);
641
642 local_alloc_inode =
643 ocfs2_get_system_file_inode(osb,
644 LOCAL_ALLOC_SYSTEM_INODE,
645 osb->slot_num);
646 if (!local_alloc_inode) {
647 status = -ENOENT;
648 mlog_errno(status);
649 goto bail;
650 }
651
652 inode_lock(local_alloc_inode);
653
654 /*
655 * We must double check state and allocator bits because
656 * another process may have changed them while holding i_mutex.
657 */
658 spin_lock(&osb->osb_lock);
659 if (!ocfs2_la_state_enabled(osb) ||
660 (bits_wanted > osb->local_alloc_bits)) {
661 spin_unlock(&osb->osb_lock);
662 status = -ENOSPC;
663 goto bail;
664 }
665 spin_unlock(&osb->osb_lock);
666
667 alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
668
669 #ifdef CONFIG_OCFS2_DEBUG_FS
670 if (le32_to_cpu(alloc->id1.bitmap1.i_used) !=
671 ocfs2_local_alloc_count_bits(alloc)) {
672 status = ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n",
673 (unsigned long long)le64_to_cpu(alloc->i_blkno),
674 le32_to_cpu(alloc->id1.bitmap1.i_used),
675 ocfs2_local_alloc_count_bits(alloc));
676 goto bail;
677 }
678 #endif
679
680 free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) -
681 le32_to_cpu(alloc->id1.bitmap1.i_used);
682 if (bits_wanted > free_bits) {
683 /* uhoh, window change time. */
684 status =
685 ocfs2_local_alloc_slide_window(osb, local_alloc_inode);
686 if (status < 0) {
687 if (status != -ENOSPC)
688 mlog_errno(status);
689 goto bail;
690 }
691
692 /*
693 * Under certain conditions, the window slide code
694 * might have reduced the number of bits available or
695 * disabled the the local alloc entirely. Re-check
696 * here and return -ENOSPC if necessary.
697 */
698 status = -ENOSPC;
699 if (!ocfs2_la_state_enabled(osb))
700 goto bail;
701
702 free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) -
703 le32_to_cpu(alloc->id1.bitmap1.i_used);
704 if (bits_wanted > free_bits)
705 goto bail;
706 }
707
708 ac->ac_inode = local_alloc_inode;
709 /* We should never use localalloc from another slot */
710 ac->ac_alloc_slot = osb->slot_num;
711 ac->ac_which = OCFS2_AC_USE_LOCAL;
712 get_bh(osb->local_alloc_bh);
713 ac->ac_bh = osb->local_alloc_bh;
714 status = 0;
715 bail:
716 if (status < 0 && local_alloc_inode) {
717 inode_unlock(local_alloc_inode);
718 iput(local_alloc_inode);
719 }
720
721 trace_ocfs2_reserve_local_alloc_bits(
722 (unsigned long long)ac->ac_max_block,
723 bits_wanted, osb->slot_num, status);
724
725 if (status)
726 mlog_errno(status);
727 return status;
728 }
729
ocfs2_claim_local_alloc_bits(struct ocfs2_super * osb,handle_t * handle,struct ocfs2_alloc_context * ac,u32 bits_wanted,u32 * bit_off,u32 * num_bits)730 int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb,
731 handle_t *handle,
732 struct ocfs2_alloc_context *ac,
733 u32 bits_wanted,
734 u32 *bit_off,
735 u32 *num_bits)
736 {
737 int status, start;
738 struct inode *local_alloc_inode;
739 void *bitmap;
740 struct ocfs2_dinode *alloc;
741 struct ocfs2_local_alloc *la;
742
743 BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL);
744
745 local_alloc_inode = ac->ac_inode;
746 alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
747 la = OCFS2_LOCAL_ALLOC(alloc);
748
749 start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted,
750 ac->ac_resv);
751 if (start == -1) {
752 /* TODO: Shouldn't we just BUG here? */
753 status = -ENOSPC;
754 mlog_errno(status);
755 goto bail;
756 }
757
758 bitmap = la->la_bitmap;
759 *bit_off = le32_to_cpu(la->la_bm_off) + start;
760 *num_bits = bits_wanted;
761
762 status = ocfs2_journal_access_di(handle,
763 INODE_CACHE(local_alloc_inode),
764 osb->local_alloc_bh,
765 OCFS2_JOURNAL_ACCESS_WRITE);
766 if (status < 0) {
767 mlog_errno(status);
768 goto bail;
769 }
770
771 ocfs2_resmap_claimed_bits(&osb->osb_la_resmap, ac->ac_resv, start,
772 bits_wanted);
773
774 while(bits_wanted--)
775 ocfs2_set_bit(start++, bitmap);
776
777 le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits);
778 ocfs2_journal_dirty(handle, osb->local_alloc_bh);
779
780 bail:
781 if (status)
782 mlog_errno(status);
783 return status;
784 }
785
ocfs2_free_local_alloc_bits(struct ocfs2_super * osb,handle_t * handle,struct ocfs2_alloc_context * ac,u32 bit_off,u32 num_bits)786 int ocfs2_free_local_alloc_bits(struct ocfs2_super *osb,
787 handle_t *handle,
788 struct ocfs2_alloc_context *ac,
789 u32 bit_off,
790 u32 num_bits)
791 {
792 int status, start;
793 u32 clear_bits;
794 struct inode *local_alloc_inode;
795 void *bitmap;
796 struct ocfs2_dinode *alloc;
797 struct ocfs2_local_alloc *la;
798
799 BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL);
800
801 local_alloc_inode = ac->ac_inode;
802 alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
803 la = OCFS2_LOCAL_ALLOC(alloc);
804
805 bitmap = la->la_bitmap;
806 start = bit_off - le32_to_cpu(la->la_bm_off);
807 clear_bits = num_bits;
808
809 status = ocfs2_journal_access_di(handle,
810 INODE_CACHE(local_alloc_inode),
811 osb->local_alloc_bh,
812 OCFS2_JOURNAL_ACCESS_WRITE);
813 if (status < 0) {
814 mlog_errno(status);
815 goto bail;
816 }
817
818 while (clear_bits--)
819 ocfs2_clear_bit(start++, bitmap);
820
821 le32_add_cpu(&alloc->id1.bitmap1.i_used, -num_bits);
822 ocfs2_journal_dirty(handle, osb->local_alloc_bh);
823
824 bail:
825 return status;
826 }
827
ocfs2_local_alloc_count_bits(struct ocfs2_dinode * alloc)828 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
829 {
830 u32 count;
831 struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
832
833 count = memweight(la->la_bitmap, le16_to_cpu(la->la_size));
834
835 trace_ocfs2_local_alloc_count_bits(count);
836 return count;
837 }
838
ocfs2_local_alloc_find_clear_bits(struct ocfs2_super * osb,struct ocfs2_dinode * alloc,u32 * numbits,struct ocfs2_alloc_reservation * resv)839 static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
840 struct ocfs2_dinode *alloc,
841 u32 *numbits,
842 struct ocfs2_alloc_reservation *resv)
843 {
844 int numfound = 0, bitoff, left, startoff, lastzero;
845 int local_resv = 0;
846 struct ocfs2_alloc_reservation r;
847 void *bitmap = NULL;
848 struct ocfs2_reservation_map *resmap = &osb->osb_la_resmap;
849
850 if (!alloc->id1.bitmap1.i_total) {
851 bitoff = -1;
852 goto bail;
853 }
854
855 if (!resv) {
856 local_resv = 1;
857 ocfs2_resv_init_once(&r);
858 ocfs2_resv_set_type(&r, OCFS2_RESV_FLAG_TMP);
859 resv = &r;
860 }
861
862 numfound = *numbits;
863 if (ocfs2_resmap_resv_bits(resmap, resv, &bitoff, &numfound) == 0) {
864 if (numfound < *numbits)
865 *numbits = numfound;
866 goto bail;
867 }
868
869 /*
870 * Code error. While reservations are enabled, local
871 * allocation should _always_ go through them.
872 */
873 BUG_ON(osb->osb_resv_level != 0);
874
875 /*
876 * Reservations are disabled. Handle this the old way.
877 */
878
879 bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap;
880
881 numfound = bitoff = startoff = 0;
882 lastzero = -1;
883 left = le32_to_cpu(alloc->id1.bitmap1.i_total);
884 while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) != -1) {
885 if (bitoff == left) {
886 /* mlog(0, "bitoff (%d) == left", bitoff); */
887 break;
888 }
889 /* mlog(0, "Found a zero: bitoff = %d, startoff = %d, "
890 "numfound = %d\n", bitoff, startoff, numfound);*/
891
892 /* Ok, we found a zero bit... is it contig. or do we
893 * start over?*/
894 if (bitoff == startoff) {
895 /* we found a zero */
896 numfound++;
897 startoff++;
898 } else {
899 /* got a zero after some ones */
900 numfound = 1;
901 startoff = bitoff+1;
902 }
903 /* we got everything we needed */
904 if (numfound == *numbits) {
905 /* mlog(0, "Found it all!\n"); */
906 break;
907 }
908 }
909
910 trace_ocfs2_local_alloc_find_clear_bits_search_bitmap(bitoff, numfound);
911
912 if (numfound == *numbits)
913 bitoff = startoff - numfound;
914 else
915 bitoff = -1;
916
917 bail:
918 if (local_resv)
919 ocfs2_resv_discard(resmap, resv);
920
921 trace_ocfs2_local_alloc_find_clear_bits(*numbits,
922 le32_to_cpu(alloc->id1.bitmap1.i_total),
923 bitoff, numfound);
924
925 return bitoff;
926 }
927
ocfs2_clear_local_alloc(struct ocfs2_dinode * alloc)928 static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc)
929 {
930 struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
931 int i;
932
933 alloc->id1.bitmap1.i_total = 0;
934 alloc->id1.bitmap1.i_used = 0;
935 la->la_bm_off = 0;
936 for(i = 0; i < le16_to_cpu(la->la_size); i++)
937 la->la_bitmap[i] = 0;
938 }
939
940 #if 0
941 /* turn this on and uncomment below to aid debugging window shifts. */
942 static void ocfs2_verify_zero_bits(unsigned long *bitmap,
943 unsigned int start,
944 unsigned int count)
945 {
946 unsigned int tmp = count;
947 while(tmp--) {
948 if (ocfs2_test_bit(start + tmp, bitmap)) {
949 printk("ocfs2_verify_zero_bits: start = %u, count = "
950 "%u\n", start, count);
951 printk("ocfs2_verify_zero_bits: bit %u is set!",
952 start + tmp);
953 BUG();
954 }
955 }
956 }
957 #endif
958
959 /*
960 * sync the local alloc to main bitmap.
961 *
962 * assumes you've already locked the main bitmap -- the bitmap inode
963 * passed is used for caching.
964 */
ocfs2_sync_local_to_main(struct ocfs2_super * osb,handle_t * handle,struct ocfs2_dinode * alloc,struct inode * main_bm_inode,struct buffer_head * main_bm_bh)965 static int ocfs2_sync_local_to_main(struct ocfs2_super *osb,
966 handle_t *handle,
967 struct ocfs2_dinode *alloc,
968 struct inode *main_bm_inode,
969 struct buffer_head *main_bm_bh)
970 {
971 int status = 0;
972 int bit_off, left, count, start;
973 u64 la_start_blk;
974 u64 blkno;
975 void *bitmap;
976 struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
977
978 trace_ocfs2_sync_local_to_main(
979 le32_to_cpu(alloc->id1.bitmap1.i_total),
980 le32_to_cpu(alloc->id1.bitmap1.i_used));
981
982 if (!alloc->id1.bitmap1.i_total) {
983 goto bail;
984 }
985
986 if (le32_to_cpu(alloc->id1.bitmap1.i_used) ==
987 le32_to_cpu(alloc->id1.bitmap1.i_total)) {
988 goto bail;
989 }
990
991 la_start_blk = ocfs2_clusters_to_blocks(osb->sb,
992 le32_to_cpu(la->la_bm_off));
993 bitmap = la->la_bitmap;
994 start = count = bit_off = 0;
995 left = le32_to_cpu(alloc->id1.bitmap1.i_total);
996
997 while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start))
998 != -1) {
999 if ((bit_off < left) && (bit_off == start)) {
1000 count++;
1001 start++;
1002 continue;
1003 }
1004 if (count) {
1005 blkno = la_start_blk +
1006 ocfs2_clusters_to_blocks(osb->sb,
1007 start - count);
1008
1009 trace_ocfs2_sync_local_to_main_free(
1010 count, start - count,
1011 (unsigned long long)la_start_blk,
1012 (unsigned long long)blkno);
1013
1014 status = ocfs2_release_clusters(handle,
1015 main_bm_inode,
1016 main_bm_bh, blkno,
1017 count);
1018 if (status < 0) {
1019 mlog_errno(status);
1020 goto bail;
1021 }
1022 }
1023 if (bit_off >= left)
1024 break;
1025 count = 1;
1026 start = bit_off + 1;
1027 }
1028
1029 bail:
1030 if (status)
1031 mlog_errno(status);
1032 return status;
1033 }
1034
1035 enum ocfs2_la_event {
1036 OCFS2_LA_EVENT_SLIDE, /* Normal window slide. */
1037 OCFS2_LA_EVENT_FRAGMENTED, /* The global bitmap has
1038 * enough bits theoretically
1039 * free, but a contiguous
1040 * allocation could not be
1041 * found. */
1042 OCFS2_LA_EVENT_ENOSPC, /* Global bitmap doesn't have
1043 * enough bits free to satisfy
1044 * our request. */
1045 };
1046 #define OCFS2_LA_ENABLE_INTERVAL (30 * HZ)
1047 /*
1048 * Given an event, calculate the size of our next local alloc window.
1049 *
1050 * This should always be called under i_mutex of the local alloc inode
1051 * so that local alloc disabling doesn't race with processes trying to
1052 * use the allocator.
1053 *
1054 * Returns the state which the local alloc was left in. This value can
1055 * be ignored by some paths.
1056 */
ocfs2_recalc_la_window(struct ocfs2_super * osb,enum ocfs2_la_event event)1057 static int ocfs2_recalc_la_window(struct ocfs2_super *osb,
1058 enum ocfs2_la_event event)
1059 {
1060 unsigned int bits;
1061 int state;
1062
1063 spin_lock(&osb->osb_lock);
1064 if (osb->local_alloc_state == OCFS2_LA_DISABLED) {
1065 WARN_ON_ONCE(osb->local_alloc_state == OCFS2_LA_DISABLED);
1066 goto out_unlock;
1067 }
1068
1069 /*
1070 * ENOSPC and fragmentation are treated similarly for now.
1071 */
1072 if (event == OCFS2_LA_EVENT_ENOSPC ||
1073 event == OCFS2_LA_EVENT_FRAGMENTED) {
1074 /*
1075 * We ran out of contiguous space in the primary
1076 * bitmap. Drastically reduce the number of bits used
1077 * by local alloc until we have to disable it.
1078 */
1079 bits = osb->local_alloc_bits >> 1;
1080 if (bits > ocfs2_megabytes_to_clusters(osb->sb, 1)) {
1081 /*
1082 * By setting state to THROTTLED, we'll keep
1083 * the number of local alloc bits used down
1084 * until an event occurs which would give us
1085 * reason to assume the bitmap situation might
1086 * have changed.
1087 */
1088 osb->local_alloc_state = OCFS2_LA_THROTTLED;
1089 osb->local_alloc_bits = bits;
1090 } else {
1091 osb->local_alloc_state = OCFS2_LA_DISABLED;
1092 }
1093 queue_delayed_work(osb->ocfs2_wq, &osb->la_enable_wq,
1094 OCFS2_LA_ENABLE_INTERVAL);
1095 goto out_unlock;
1096 }
1097
1098 /*
1099 * Don't increase the size of the local alloc window until we
1100 * know we might be able to fulfill the request. Otherwise, we
1101 * risk bouncing around the global bitmap during periods of
1102 * low space.
1103 */
1104 if (osb->local_alloc_state != OCFS2_LA_THROTTLED)
1105 osb->local_alloc_bits = osb->local_alloc_default_bits;
1106
1107 out_unlock:
1108 state = osb->local_alloc_state;
1109 spin_unlock(&osb->osb_lock);
1110
1111 return state;
1112 }
1113
ocfs2_local_alloc_reserve_for_window(struct ocfs2_super * osb,struct ocfs2_alloc_context ** ac,struct inode ** bitmap_inode,struct buffer_head ** bitmap_bh)1114 static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb,
1115 struct ocfs2_alloc_context **ac,
1116 struct inode **bitmap_inode,
1117 struct buffer_head **bitmap_bh)
1118 {
1119 int status;
1120
1121 *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
1122 if (!(*ac)) {
1123 status = -ENOMEM;
1124 mlog_errno(status);
1125 goto bail;
1126 }
1127
1128 retry_enospc:
1129 (*ac)->ac_bits_wanted = osb->local_alloc_bits;
1130 status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
1131 if (status == -ENOSPC) {
1132 if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) ==
1133 OCFS2_LA_DISABLED)
1134 goto bail;
1135
1136 ocfs2_free_ac_resource(*ac);
1137 memset(*ac, 0, sizeof(struct ocfs2_alloc_context));
1138 goto retry_enospc;
1139 }
1140 if (status < 0) {
1141 mlog_errno(status);
1142 goto bail;
1143 }
1144
1145 *bitmap_inode = (*ac)->ac_inode;
1146 igrab(*bitmap_inode);
1147 *bitmap_bh = (*ac)->ac_bh;
1148 get_bh(*bitmap_bh);
1149 status = 0;
1150 bail:
1151 if ((status < 0) && *ac) {
1152 ocfs2_free_alloc_context(*ac);
1153 *ac = NULL;
1154 }
1155
1156 if (status)
1157 mlog_errno(status);
1158 return status;
1159 }
1160
1161 /*
1162 * pass it the bitmap lock in lock_bh if you have it.
1163 */
ocfs2_local_alloc_new_window(struct ocfs2_super * osb,handle_t * handle,struct ocfs2_alloc_context * ac)1164 static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb,
1165 handle_t *handle,
1166 struct ocfs2_alloc_context *ac)
1167 {
1168 int status = 0;
1169 u32 cluster_off, cluster_count;
1170 struct ocfs2_dinode *alloc = NULL;
1171 struct ocfs2_local_alloc *la;
1172
1173 alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
1174 la = OCFS2_LOCAL_ALLOC(alloc);
1175
1176 trace_ocfs2_local_alloc_new_window(
1177 le32_to_cpu(alloc->id1.bitmap1.i_total),
1178 osb->local_alloc_bits);
1179
1180 /* Instruct the allocation code to try the most recently used
1181 * cluster group. We'll re-record the group used this pass
1182 * below. */
1183 ac->ac_last_group = osb->la_last_gd;
1184
1185 /* we used the generic suballoc reserve function, but we set
1186 * everything up nicely, so there's no reason why we can't use
1187 * the more specific cluster api to claim bits. */
1188 status = ocfs2_claim_clusters(handle, ac, osb->local_alloc_bits,
1189 &cluster_off, &cluster_count);
1190 if (status == -ENOSPC) {
1191 retry_enospc:
1192 /*
1193 * Note: We could also try syncing the journal here to
1194 * allow use of any free bits which the current
1195 * transaction can't give us access to. --Mark
1196 */
1197 if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_FRAGMENTED) ==
1198 OCFS2_LA_DISABLED)
1199 goto bail;
1200
1201 ac->ac_bits_wanted = osb->local_alloc_bits;
1202 status = ocfs2_claim_clusters(handle, ac,
1203 osb->local_alloc_bits,
1204 &cluster_off,
1205 &cluster_count);
1206 if (status == -ENOSPC)
1207 goto retry_enospc;
1208 /*
1209 * We only shrunk the *minimum* number of in our
1210 * request - it's entirely possible that the allocator
1211 * might give us more than we asked for.
1212 */
1213 if (status == 0) {
1214 spin_lock(&osb->osb_lock);
1215 osb->local_alloc_bits = cluster_count;
1216 spin_unlock(&osb->osb_lock);
1217 }
1218 }
1219 if (status < 0) {
1220 if (status != -ENOSPC)
1221 mlog_errno(status);
1222 goto bail;
1223 }
1224
1225 osb->la_last_gd = ac->ac_last_group;
1226
1227 la->la_bm_off = cpu_to_le32(cluster_off);
1228 alloc->id1.bitmap1.i_total = cpu_to_le32(cluster_count);
1229 /* just in case... In the future when we find space ourselves,
1230 * we don't have to get all contiguous -- but we'll have to
1231 * set all previously used bits in bitmap and update
1232 * la_bits_set before setting the bits in the main bitmap. */
1233 alloc->id1.bitmap1.i_used = 0;
1234 memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0,
1235 le16_to_cpu(la->la_size));
1236
1237 ocfs2_resmap_restart(&osb->osb_la_resmap, cluster_count,
1238 OCFS2_LOCAL_ALLOC(alloc)->la_bitmap);
1239
1240 trace_ocfs2_local_alloc_new_window_result(
1241 OCFS2_LOCAL_ALLOC(alloc)->la_bm_off,
1242 le32_to_cpu(alloc->id1.bitmap1.i_total));
1243
1244 bail:
1245 if (status)
1246 mlog_errno(status);
1247 return status;
1248 }
1249
1250 /* Note that we do *NOT* lock the local alloc inode here as
1251 * it's been locked already for us. */
ocfs2_local_alloc_slide_window(struct ocfs2_super * osb,struct inode * local_alloc_inode)1252 static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
1253 struct inode *local_alloc_inode)
1254 {
1255 int status = 0;
1256 struct buffer_head *main_bm_bh = NULL;
1257 struct inode *main_bm_inode = NULL;
1258 handle_t *handle = NULL;
1259 struct ocfs2_dinode *alloc;
1260 struct ocfs2_dinode *alloc_copy = NULL;
1261 struct ocfs2_alloc_context *ac = NULL;
1262
1263 ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_SLIDE);
1264
1265 /* This will lock the main bitmap for us. */
1266 status = ocfs2_local_alloc_reserve_for_window(osb,
1267 &ac,
1268 &main_bm_inode,
1269 &main_bm_bh);
1270 if (status < 0) {
1271 if (status != -ENOSPC)
1272 mlog_errno(status);
1273 goto bail;
1274 }
1275
1276 handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS);
1277 if (IS_ERR(handle)) {
1278 status = PTR_ERR(handle);
1279 handle = NULL;
1280 mlog_errno(status);
1281 goto bail;
1282 }
1283
1284 alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
1285
1286 /* We want to clear the local alloc before doing anything
1287 * else, so that if we error later during this operation,
1288 * local alloc shutdown won't try to double free main bitmap
1289 * bits. Make a copy so the sync function knows which bits to
1290 * free. */
1291 alloc_copy = kmalloc(osb->local_alloc_bh->b_size, GFP_NOFS);
1292 if (!alloc_copy) {
1293 status = -ENOMEM;
1294 mlog_errno(status);
1295 goto bail;
1296 }
1297 memcpy(alloc_copy, alloc, osb->local_alloc_bh->b_size);
1298
1299 status = ocfs2_journal_access_di(handle,
1300 INODE_CACHE(local_alloc_inode),
1301 osb->local_alloc_bh,
1302 OCFS2_JOURNAL_ACCESS_WRITE);
1303 if (status < 0) {
1304 mlog_errno(status);
1305 goto bail;
1306 }
1307
1308 ocfs2_clear_local_alloc(alloc);
1309 ocfs2_journal_dirty(handle, osb->local_alloc_bh);
1310
1311 status = ocfs2_sync_local_to_main(osb, handle, alloc_copy,
1312 main_bm_inode, main_bm_bh);
1313 if (status < 0) {
1314 mlog_errno(status);
1315 goto bail;
1316 }
1317
1318 status = ocfs2_local_alloc_new_window(osb, handle, ac);
1319 if (status < 0) {
1320 if (status != -ENOSPC)
1321 mlog_errno(status);
1322 goto bail;
1323 }
1324
1325 atomic_inc(&osb->alloc_stats.moves);
1326
1327 bail:
1328 if (handle)
1329 ocfs2_commit_trans(osb, handle);
1330
1331 brelse(main_bm_bh);
1332
1333 iput(main_bm_inode);
1334 kfree(alloc_copy);
1335
1336 if (ac)
1337 ocfs2_free_alloc_context(ac);
1338
1339 if (status)
1340 mlog_errno(status);
1341 return status;
1342 }
1343
1344