2
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3
* Copyright (C) 2010 Red Hat, Inc.
6
* This program is free software; you can redistribute it and/or
7
* modify it under the terms of the GNU General Public License as
8
* published by the Free Software Foundation.
10
* This program is distributed in the hope that it would be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write the Free Software Foundation,
17
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21
#include "xfs_types.h"
25
#include "xfs_trans.h"
28
#include "xfs_mount.h"
29
#include "xfs_error.h"
30
#include "xfs_da_btree.h"
31
#include "xfs_bmap_btree.h"
32
#include "xfs_alloc_btree.h"
33
#include "xfs_ialloc_btree.h"
34
#include "xfs_dinode.h"
35
#include "xfs_inode.h"
36
#include "xfs_btree.h"
37
#include "xfs_ialloc.h"
38
#include "xfs_alloc.h"
40
#include "xfs_quota.h"
41
#include "xfs_trans_priv.h"
42
#include "xfs_trans_space.h"
43
#include "xfs_inode_item.h"
44
#include "xfs_trace.h"
46
kmem_zone_t *xfs_trans_zone;
47
kmem_zone_t *xfs_log_item_desc_zone;
51
* Various log reservation values.
53
* These are based on the size of the file system block because that is what
54
* most transactions manipulate. Each adds in an additional 128 bytes per
55
* item logged to try to account for the overhead of the transaction mechanism.
57
* Note: Most of the reservations underestimate the number of allocation
58
* groups into which they could free extents in the xfs_bmap_finish() call.
59
* This is because the number in the worst case is quite high and quite
60
* unusual. In order to fix this we need to change xfs_bmap_finish() to free
61
* extents in only a single AG at a time. This will require changes to the
62
* EFI code as well, however, so that the EFI for the extents not freed is
63
* logged again in each transaction. See SGI PV #261917.
65
* Reservation functions here avoid a huge stack in xfs_trans_init due to
66
* register overflow from temporaries in the calculations.
71
* In a write transaction we can allocate a maximum of 2
72
* extents. This gives:
73
* the inode getting the new extents: inode size
74
* the inode's bmap btree: max depth * block size
75
* the agfs of the ags from which the extents are allocated: 2 * sector
76
* the superblock free block counter: sector size
77
* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
78
* And the bmap_finish transaction can free bmap blocks in a join:
79
* the agfs of the ags containing the blocks: 2 * sector size
80
* the agfls of the ags containing the blocks: 2 * sector size
81
* the super block free block counter: sector size
82
* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
85
xfs_calc_write_reservation(
88
return XFS_DQUOT_LOGRES(mp) +
89
MAX((mp->m_sb.sb_inodesize +
90
XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) +
91
2 * mp->m_sb.sb_sectsize +
92
mp->m_sb.sb_sectsize +
93
XFS_ALLOCFREE_LOG_RES(mp, 2) +
94
128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) +
95
XFS_ALLOCFREE_LOG_COUNT(mp, 2))),
96
(2 * mp->m_sb.sb_sectsize +
97
2 * mp->m_sb.sb_sectsize +
98
mp->m_sb.sb_sectsize +
99
XFS_ALLOCFREE_LOG_RES(mp, 2) +
100
128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
104
* In truncating a file we free up to two extents at once. We can modify:
105
* the inode being truncated: inode size
106
* the inode's bmap btree: (max depth + 1) * block size
107
* And the bmap_finish transaction can free the blocks and bmap blocks:
108
* the agf for each of the ags: 4 * sector size
109
* the agfl for each of the ags: 4 * sector size
110
* the super block to reflect the freed blocks: sector size
111
* worst case split in allocation btrees per extent assuming 4 extents:
112
* 4 exts * 2 trees * (2 * max depth - 1) * block size
113
* the inode btree: max depth * blocksize
114
* the allocation btrees: 2 trees * (max depth - 1) * block size
117
xfs_calc_itruncate_reservation(
118
struct xfs_mount *mp)
120
return XFS_DQUOT_LOGRES(mp) +
121
MAX((mp->m_sb.sb_inodesize +
122
XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) +
123
128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK))),
124
(4 * mp->m_sb.sb_sectsize +
125
4 * mp->m_sb.sb_sectsize +
126
mp->m_sb.sb_sectsize +
127
XFS_ALLOCFREE_LOG_RES(mp, 4) +
128
128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4)) +
130
XFS_ALLOCFREE_LOG_RES(mp, 1) +
131
128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
132
XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
136
* In renaming a files we can modify:
137
* the four inodes involved: 4 * inode size
138
* the two directory btrees: 2 * (max depth + v2) * dir block size
139
* the two directory bmap btrees: 2 * max depth * block size
140
* And the bmap_finish transaction can free dir and bmap blocks (two sets
141
* of bmap blocks) giving:
142
* the agf for the ags in which the blocks live: 3 * sector size
143
* the agfl for the ags in which the blocks live: 3 * sector size
144
* the superblock for the free block count: sector size
145
* the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
148
xfs_calc_rename_reservation(
149
struct xfs_mount *mp)
151
return XFS_DQUOT_LOGRES(mp) +
152
MAX((4 * mp->m_sb.sb_inodesize +
153
2 * XFS_DIROP_LOG_RES(mp) +
154
128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp))),
155
(3 * mp->m_sb.sb_sectsize +
156
3 * mp->m_sb.sb_sectsize +
157
mp->m_sb.sb_sectsize +
158
XFS_ALLOCFREE_LOG_RES(mp, 3) +
159
128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))));
163
* For creating a link to an inode:
164
* the parent directory inode: inode size
165
* the linked inode: inode size
166
* the directory btree could split: (max depth + v2) * dir block size
167
* the directory bmap btree could join or split: (max depth + v2) * blocksize
168
* And the bmap_finish transaction can free some bmap blocks giving:
169
* the agf for the ag in which the blocks live: sector size
170
* the agfl for the ag in which the blocks live: sector size
171
* the superblock for the free block count: sector size
172
* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
175
xfs_calc_link_reservation(
176
struct xfs_mount *mp)
178
return XFS_DQUOT_LOGRES(mp) +
179
MAX((mp->m_sb.sb_inodesize +
180
mp->m_sb.sb_inodesize +
181
XFS_DIROP_LOG_RES(mp) +
182
128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
183
(mp->m_sb.sb_sectsize +
184
mp->m_sb.sb_sectsize +
185
mp->m_sb.sb_sectsize +
186
XFS_ALLOCFREE_LOG_RES(mp, 1) +
187
128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
191
* For removing a directory entry we can modify:
192
* the parent directory inode: inode size
193
* the removed inode: inode size
194
* the directory btree could join: (max depth + v2) * dir block size
195
* the directory bmap btree could join or split: (max depth + v2) * blocksize
196
* And the bmap_finish transaction can free the dir and bmap blocks giving:
197
* the agf for the ag in which the blocks live: 2 * sector size
198
* the agfl for the ag in which the blocks live: 2 * sector size
199
* the superblock for the free block count: sector size
200
* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
203
xfs_calc_remove_reservation(
204
struct xfs_mount *mp)
206
return XFS_DQUOT_LOGRES(mp) +
207
MAX((mp->m_sb.sb_inodesize +
208
mp->m_sb.sb_inodesize +
209
XFS_DIROP_LOG_RES(mp) +
210
128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
211
(2 * mp->m_sb.sb_sectsize +
212
2 * mp->m_sb.sb_sectsize +
213
mp->m_sb.sb_sectsize +
214
XFS_ALLOCFREE_LOG_RES(mp, 2) +
215
128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
219
* For symlink we can modify:
220
* the parent directory inode: inode size
221
* the new inode: inode size
222
* the inode btree entry: 1 block
223
* the directory btree: (max depth + v2) * dir block size
224
* the directory inode's bmap btree: (max depth + v2) * block size
225
* the blocks for the symlink: 1 kB
226
* Or in the first xact we allocate some inodes giving:
227
* the agi and agf of the ag getting the new inodes: 2 * sectorsize
228
* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
229
* the inode btree: max depth * blocksize
230
* the allocation btrees: 2 trees * (2 * max depth - 1) * block size
233
xfs_calc_symlink_reservation(
234
struct xfs_mount *mp)
236
return XFS_DQUOT_LOGRES(mp) +
237
MAX((mp->m_sb.sb_inodesize +
238
mp->m_sb.sb_inodesize +
239
XFS_FSB_TO_B(mp, 1) +
240
XFS_DIROP_LOG_RES(mp) +
242
128 * (4 + XFS_DIROP_LOG_COUNT(mp))),
243
(2 * mp->m_sb.sb_sectsize +
244
XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
245
XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
246
XFS_ALLOCFREE_LOG_RES(mp, 1) +
247
128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
248
XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
252
* For create we can modify:
253
* the parent directory inode: inode size
254
* the new inode: inode size
255
* the inode btree entry: block size
256
* the superblock for the nlink flag: sector size
257
* the directory btree: (max depth + v2) * dir block size
258
* the directory inode's bmap btree: (max depth + v2) * block size
259
* Or in the first xact we allocate some inodes giving:
260
* the agi and agf of the ag getting the new inodes: 2 * sectorsize
261
* the superblock for the nlink flag: sector size
262
* the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
263
* the inode btree: max depth * blocksize
264
* the allocation btrees: 2 trees * (max depth - 1) * block size
267
xfs_calc_create_reservation(
268
struct xfs_mount *mp)
270
return XFS_DQUOT_LOGRES(mp) +
271
MAX((mp->m_sb.sb_inodesize +
272
mp->m_sb.sb_inodesize +
273
mp->m_sb.sb_sectsize +
274
XFS_FSB_TO_B(mp, 1) +
275
XFS_DIROP_LOG_RES(mp) +
276
128 * (3 + XFS_DIROP_LOG_COUNT(mp))),
277
(3 * mp->m_sb.sb_sectsize +
278
XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
279
XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
280
XFS_ALLOCFREE_LOG_RES(mp, 1) +
281
128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
282
XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
286
* Making a new directory is the same as creating a new file.
289
xfs_calc_mkdir_reservation(
290
struct xfs_mount *mp)
292
return xfs_calc_create_reservation(mp);
296
* In freeing an inode we can modify:
297
* the inode being freed: inode size
298
* the super block free inode counter: sector size
299
* the agi hash list and counters: sector size
300
* the inode btree entry: block size
301
* the on disk inode before ours in the agi hash list: inode cluster size
302
* the inode btree: max depth * blocksize
303
* the allocation btrees: 2 trees * (max depth - 1) * block size
306
xfs_calc_ifree_reservation(
307
struct xfs_mount *mp)
309
return XFS_DQUOT_LOGRES(mp) +
310
mp->m_sb.sb_inodesize +
311
mp->m_sb.sb_sectsize +
312
mp->m_sb.sb_sectsize +
313
XFS_FSB_TO_B(mp, 1) +
314
MAX((__uint16_t)XFS_FSB_TO_B(mp, 1),
315
XFS_INODE_CLUSTER_SIZE(mp)) +
317
XFS_ALLOCFREE_LOG_RES(mp, 1) +
318
128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
319
XFS_ALLOCFREE_LOG_COUNT(mp, 1));
323
* When only changing the inode we log the inode and possibly the superblock
324
* We also add a bit of slop for the transaction stuff.
327
xfs_calc_ichange_reservation(
328
struct xfs_mount *mp)
330
return XFS_DQUOT_LOGRES(mp) +
331
mp->m_sb.sb_inodesize +
332
mp->m_sb.sb_sectsize +
338
* Growing the data section of the filesystem.
344
xfs_calc_growdata_reservation(
345
struct xfs_mount *mp)
347
return mp->m_sb.sb_sectsize * 3 +
348
XFS_ALLOCFREE_LOG_RES(mp, 1) +
349
128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1));
353
* Growing the rt section of the filesystem.
354
* In the first set of transactions (ALLOC) we allocate space to the
355
* bitmap or summary files.
356
* superblock: sector size
357
* agf of the ag from which the extent is allocated: sector size
358
* bmap btree for bitmap/summary inode: max depth * blocksize
359
* bitmap/summary inode: inode size
360
* allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
363
xfs_calc_growrtalloc_reservation(
364
struct xfs_mount *mp)
366
return 2 * mp->m_sb.sb_sectsize +
367
XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) +
368
mp->m_sb.sb_inodesize +
369
XFS_ALLOCFREE_LOG_RES(mp, 1) +
370
128 * (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) +
371
XFS_ALLOCFREE_LOG_COUNT(mp, 1));
375
* Growing the rt section of the filesystem.
376
* In the second set of transactions (ZERO) we zero the new metadata blocks.
377
* one bitmap/summary block: blocksize
380
xfs_calc_growrtzero_reservation(
381
struct xfs_mount *mp)
383
return mp->m_sb.sb_blocksize + 128;
387
* Growing the rt section of the filesystem.
388
* In the third set of transactions (FREE) we update metadata without
389
* allocating any new blocks.
390
* superblock: sector size
391
* bitmap inode: inode size
392
* summary inode: inode size
393
* one bitmap block: blocksize
394
* summary blocks: new summary size
397
xfs_calc_growrtfree_reservation(
398
struct xfs_mount *mp)
400
return mp->m_sb.sb_sectsize +
401
2 * mp->m_sb.sb_inodesize +
402
mp->m_sb.sb_blocksize +
408
* Logging the inode modification timestamp on a synchronous write.
412
xfs_calc_swrite_reservation(
413
struct xfs_mount *mp)
415
return mp->m_sb.sb_inodesize + 128;
419
* Logging the inode mode bits when writing a setuid/setgid file
423
xfs_calc_writeid_reservation(xfs_mount_t *mp)
425
return mp->m_sb.sb_inodesize + 128;
429
* Converting the inode from non-attributed to attributed.
430
* the inode being converted: inode size
431
* agf block and superblock (for block allocation)
432
* the new block (directory sized)
433
* bmap blocks for the new directory block
437
xfs_calc_addafork_reservation(
438
struct xfs_mount *mp)
440
return XFS_DQUOT_LOGRES(mp) +
441
mp->m_sb.sb_inodesize +
442
mp->m_sb.sb_sectsize * 2 +
444
XFS_FSB_TO_B(mp, XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) +
445
XFS_ALLOCFREE_LOG_RES(mp, 1) +
446
128 * (4 + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1 +
447
XFS_ALLOCFREE_LOG_COUNT(mp, 1));
451
* Removing the attribute fork of a file
452
* the inode being truncated: inode size
453
* the inode's bmap btree: max depth * block size
454
* And the bmap_finish transaction can free the blocks and bmap blocks:
455
* the agf for each of the ags: 4 * sector size
456
* the agfl for each of the ags: 4 * sector size
457
* the super block to reflect the freed blocks: sector size
458
* worst case split in allocation btrees per extent assuming 4 extents:
459
* 4 exts * 2 trees * (2 * max depth - 1) * block size
462
xfs_calc_attrinval_reservation(
463
struct xfs_mount *mp)
465
return MAX((mp->m_sb.sb_inodesize +
466
XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) +
467
128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))),
468
(4 * mp->m_sb.sb_sectsize +
469
4 * mp->m_sb.sb_sectsize +
470
mp->m_sb.sb_sectsize +
471
XFS_ALLOCFREE_LOG_RES(mp, 4) +
472
128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))));
476
* Setting an attribute.
477
* the inode getting the attribute
478
* the superblock for allocations
479
* the agfs extents are allocated from
480
* the attribute btree * max depth
481
* the inode allocation btree
482
* Since attribute transaction space is dependent on the size of the attribute,
483
* the calculation is done partially at mount time and partially at runtime.
486
xfs_calc_attrset_reservation(
487
struct xfs_mount *mp)
489
return XFS_DQUOT_LOGRES(mp) +
490
mp->m_sb.sb_inodesize +
491
mp->m_sb.sb_sectsize +
492
XFS_FSB_TO_B(mp, XFS_DA_NODE_MAXDEPTH) +
493
128 * (2 + XFS_DA_NODE_MAXDEPTH);
497
* Removing an attribute.
498
* the inode: inode size
499
* the attribute btree could join: max depth * block size
500
* the inode bmap btree could join or split: max depth * block size
501
* And the bmap_finish transaction can free the attr blocks freed giving:
502
* the agf for the ag in which the blocks live: 2 * sector size
503
* the agfl for the ag in which the blocks live: 2 * sector size
504
* the superblock for the free block count: sector size
505
* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
508
xfs_calc_attrrm_reservation(
509
struct xfs_mount *mp)
511
return XFS_DQUOT_LOGRES(mp) +
512
MAX((mp->m_sb.sb_inodesize +
513
XFS_FSB_TO_B(mp, XFS_DA_NODE_MAXDEPTH) +
514
XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) +
515
128 * (1 + XFS_DA_NODE_MAXDEPTH +
516
XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK))),
517
(2 * mp->m_sb.sb_sectsize +
518
2 * mp->m_sb.sb_sectsize +
519
mp->m_sb.sb_sectsize +
520
XFS_ALLOCFREE_LOG_RES(mp, 2) +
521
128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
525
* Clearing a bad agino number in an agi hash bucket.
528
xfs_calc_clear_agi_bucket_reservation(
529
struct xfs_mount *mp)
531
return mp->m_sb.sb_sectsize + 128;
535
* Initialize the precomputed transaction reservation values
536
* in the mount structure.
540
struct xfs_mount *mp)
542
struct xfs_trans_reservations *resp = &mp->m_reservations;
544
resp->tr_write = xfs_calc_write_reservation(mp);
545
resp->tr_itruncate = xfs_calc_itruncate_reservation(mp);
546
resp->tr_rename = xfs_calc_rename_reservation(mp);
547
resp->tr_link = xfs_calc_link_reservation(mp);
548
resp->tr_remove = xfs_calc_remove_reservation(mp);
549
resp->tr_symlink = xfs_calc_symlink_reservation(mp);
550
resp->tr_create = xfs_calc_create_reservation(mp);
551
resp->tr_mkdir = xfs_calc_mkdir_reservation(mp);
552
resp->tr_ifree = xfs_calc_ifree_reservation(mp);
553
resp->tr_ichange = xfs_calc_ichange_reservation(mp);
554
resp->tr_growdata = xfs_calc_growdata_reservation(mp);
555
resp->tr_swrite = xfs_calc_swrite_reservation(mp);
556
resp->tr_writeid = xfs_calc_writeid_reservation(mp);
557
resp->tr_addafork = xfs_calc_addafork_reservation(mp);
558
resp->tr_attrinval = xfs_calc_attrinval_reservation(mp);
559
resp->tr_attrset = xfs_calc_attrset_reservation(mp);
560
resp->tr_attrrm = xfs_calc_attrrm_reservation(mp);
561
resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp);
562
resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);
563
resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp);
564
resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
568
* This routine is called to allocate a transaction structure.
569
* The type parameter indicates the type of the transaction. These
570
* are enumerated in xfs_trans.h.
572
* Dynamically allocate the transaction structure from the transaction
573
* zone, initialize it, and return it to the caller.
580
xfs_wait_for_freeze(mp, SB_FREEZE_TRANS);
581
return _xfs_trans_alloc(mp, type, KM_SLEEP);
592
atomic_inc(&mp->m_active_trans);
594
tp = kmem_zone_zalloc(xfs_trans_zone, memflags);
595
tp->t_magic = XFS_TRANS_MAGIC;
598
INIT_LIST_HEAD(&tp->t_items);
599
INIT_LIST_HEAD(&tp->t_busy);
604
* Free the transaction structure. If there is more clean up
605
* to do when the structure is freed, add it here.
609
struct xfs_trans *tp)
611
xfs_alloc_busy_sort(&tp->t_busy);
612
xfs_alloc_busy_clear(tp->t_mountp, &tp->t_busy, false);
614
atomic_dec(&tp->t_mountp->m_active_trans);
615
xfs_trans_free_dqinfo(tp);
616
kmem_zone_free(xfs_trans_zone, tp);
620
* This is called to create a new transaction which will share the
621
* permanent log reservation of the given transaction. The remaining
622
* unused block and rt extent reservations are also inherited. This
623
* implies that the original transaction is no longer allowed to allocate
624
* blocks. Locks and log items, however, are no inherited. They must
625
* be added to the new transaction explicitly.
633
ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
636
* Initialize the new transaction structure.
638
ntp->t_magic = XFS_TRANS_MAGIC;
639
ntp->t_type = tp->t_type;
640
ntp->t_mountp = tp->t_mountp;
641
INIT_LIST_HEAD(&ntp->t_items);
642
INIT_LIST_HEAD(&ntp->t_busy);
644
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
645
ASSERT(tp->t_ticket != NULL);
647
ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE);
648
ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
649
ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
650
tp->t_blk_res = tp->t_blk_res_used;
651
ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
652
tp->t_rtx_res = tp->t_rtx_res_used;
653
ntp->t_pflags = tp->t_pflags;
655
xfs_trans_dup_dqinfo(tp, ntp);
657
atomic_inc(&tp->t_mountp->m_active_trans);
662
* This is called to reserve free disk blocks and log space for the
663
* given transaction. This must be done before allocating any resources
664
* within the transaction.
666
* This will return ENOSPC if there are not enough blocks available.
667
* It will sleep waiting for available log space.
668
* The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
669
* is used by long running transactions. If any one of the reservations
670
* fails then they will all be backed out.
672
* This does not do quota reservations. That typically is done by the
686
int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
688
/* Mark this thread as being in a transaction */
689
current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
692
* Attempt to reserve the needed disk blocks by decrementing
693
* the number needed from the number available. This will
694
* fail if the count would go below zero.
697
error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
698
-((int64_t)blocks), rsvd);
700
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
701
return (XFS_ERROR(ENOSPC));
703
tp->t_blk_res += blocks;
707
* Reserve the log space needed for this transaction.
710
ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace));
711
ASSERT((tp->t_log_count == 0) ||
712
(tp->t_log_count == logcount));
713
if (flags & XFS_TRANS_PERM_LOG_RES) {
714
log_flags = XFS_LOG_PERM_RESERV;
715
tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
717
ASSERT(tp->t_ticket == NULL);
718
ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
722
error = xfs_log_reserve(tp->t_mountp, logspace, logcount,
724
XFS_TRANSACTION, log_flags, tp->t_type);
728
tp->t_log_res = logspace;
729
tp->t_log_count = logcount;
733
* Attempt to reserve the needed realtime extents by decrementing
734
* the number needed from the number available. This will
735
* fail if the count would go below zero.
738
error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
739
-((int64_t)rtextents), rsvd);
741
error = XFS_ERROR(ENOSPC);
744
tp->t_rtx_res += rtextents;
750
* Error cases jump to one of these labels to undo any
751
* reservations which have already been performed.
755
if (flags & XFS_TRANS_PERM_LOG_RES) {
756
log_flags = XFS_LOG_REL_PERM_RESERV;
760
xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags);
763
tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
768
xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
769
(int64_t)blocks, rsvd);
773
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
779
* Record the indicated change to the given field for application
780
* to the file system's superblock when the transaction commits.
781
* For now, just store the change in the transaction structure.
783
* Mark the transaction structure to indicate that the superblock
784
* needs to be updated before committing.
786
* Because we may not be keeping track of allocated/free inodes and
787
* used filesystem blocks in the superblock, we do not mark the
788
* superblock dirty in this transaction if we modify these fields.
789
* We still need to update the transaction deltas so that they get
790
* applied to the incore superblock, but we don't want them to
791
* cause the superblock to get locked and logged if these are the
792
* only fields in the superblock that the transaction modifies.
800
uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
801
xfs_mount_t *mp = tp->t_mountp;
804
case XFS_TRANS_SB_ICOUNT:
805
tp->t_icount_delta += delta;
806
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
807
flags &= ~XFS_TRANS_SB_DIRTY;
809
case XFS_TRANS_SB_IFREE:
810
tp->t_ifree_delta += delta;
811
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
812
flags &= ~XFS_TRANS_SB_DIRTY;
814
case XFS_TRANS_SB_FDBLOCKS:
816
* Track the number of blocks allocated in the
817
* transaction. Make sure it does not exceed the
821
tp->t_blk_res_used += (uint)-delta;
822
ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
824
tp->t_fdblocks_delta += delta;
825
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
826
flags &= ~XFS_TRANS_SB_DIRTY;
828
case XFS_TRANS_SB_RES_FDBLOCKS:
830
* The allocation has already been applied to the
831
* in-core superblock's counter. This should only
832
* be applied to the on-disk superblock.
835
tp->t_res_fdblocks_delta += delta;
836
if (xfs_sb_version_haslazysbcount(&mp->m_sb))
837
flags &= ~XFS_TRANS_SB_DIRTY;
839
case XFS_TRANS_SB_FREXTENTS:
841
* Track the number of blocks allocated in the
842
* transaction. Make sure it does not exceed the
846
tp->t_rtx_res_used += (uint)-delta;
847
ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
849
tp->t_frextents_delta += delta;
851
case XFS_TRANS_SB_RES_FREXTENTS:
853
* The allocation has already been applied to the
854
* in-core superblock's counter. This should only
855
* be applied to the on-disk superblock.
858
tp->t_res_frextents_delta += delta;
860
case XFS_TRANS_SB_DBLOCKS:
862
tp->t_dblocks_delta += delta;
864
case XFS_TRANS_SB_AGCOUNT:
866
tp->t_agcount_delta += delta;
868
case XFS_TRANS_SB_IMAXPCT:
869
tp->t_imaxpct_delta += delta;
871
case XFS_TRANS_SB_REXTSIZE:
872
tp->t_rextsize_delta += delta;
874
case XFS_TRANS_SB_RBMBLOCKS:
875
tp->t_rbmblocks_delta += delta;
877
case XFS_TRANS_SB_RBLOCKS:
878
tp->t_rblocks_delta += delta;
880
case XFS_TRANS_SB_REXTENTS:
881
tp->t_rextents_delta += delta;
883
case XFS_TRANS_SB_REXTSLOG:
884
tp->t_rextslog_delta += delta;
891
tp->t_flags |= flags;
895
* xfs_trans_apply_sb_deltas() is called from the commit code
896
* to bring the superblock buffer into the current transaction
897
* and modify it as requested by earlier calls to xfs_trans_mod_sb().
899
* For now we just look at each field allowed to change and change
903
xfs_trans_apply_sb_deltas(
910
bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
911
sbp = XFS_BUF_TO_SBP(bp);
914
* Check that superblock mods match the mods made to AGF counters.
916
ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
917
(tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
918
tp->t_ag_btree_delta));
921
* Only update the superblock counters if we are logging them
923
if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
924
if (tp->t_icount_delta)
925
be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
926
if (tp->t_ifree_delta)
927
be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
928
if (tp->t_fdblocks_delta)
929
be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
930
if (tp->t_res_fdblocks_delta)
931
be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
934
if (tp->t_frextents_delta)
935
be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
936
if (tp->t_res_frextents_delta)
937
be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
939
if (tp->t_dblocks_delta) {
940
be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
943
if (tp->t_agcount_delta) {
944
be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
947
if (tp->t_imaxpct_delta) {
948
sbp->sb_imax_pct += tp->t_imaxpct_delta;
951
if (tp->t_rextsize_delta) {
952
be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
955
if (tp->t_rbmblocks_delta) {
956
be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
959
if (tp->t_rblocks_delta) {
960
be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
963
if (tp->t_rextents_delta) {
964
be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
967
if (tp->t_rextslog_delta) {
968
sbp->sb_rextslog += tp->t_rextslog_delta;
974
* Log the whole thing, the fields are noncontiguous.
976
xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
979
* Since all the modifiable fields are contiguous, we
980
* can get away with this.
982
xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
983
offsetof(xfs_dsb_t, sb_frextents) +
984
sizeof(sbp->sb_frextents) - 1);
988
* xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
989
* and apply superblock counter changes to the in-core superblock. The
990
* t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
991
* applied to the in-core superblock. The idea is that that has already been
994
* This is done efficiently with a single call to xfs_mod_incore_sb_batch().
995
* However, we have to ensure that we only modify each superblock field only
996
* once because the application of the delta values may not be atomic. That can
997
* lead to ENOSPC races occurring if we have two separate modifcations of the
998
* free space counter to put back the entire reservation and then take away
1001
* If we are not logging superblock counters, then the inode allocated/free and
1002
* used block counts are not updated in the on disk superblock. In this case,
1003
* XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
1004
* still need to update the incore superblock with the changes.
1007
xfs_trans_unreserve_and_mod_sb(
1010
xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
1012
xfs_mount_t *mp = tp->t_mountp;
1016
int64_t blkdelta = 0;
1017
int64_t rtxdelta = 0;
1019
int64_t ifreedelta = 0;
1022
rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
1024
/* calculate deltas */
1025
if (tp->t_blk_res > 0)
1026
blkdelta = tp->t_blk_res;
1027
if ((tp->t_fdblocks_delta != 0) &&
1028
(xfs_sb_version_haslazysbcount(&mp->m_sb) ||
1029
(tp->t_flags & XFS_TRANS_SB_DIRTY)))
1030
blkdelta += tp->t_fdblocks_delta;
1032
if (tp->t_rtx_res > 0)
1033
rtxdelta = tp->t_rtx_res;
1034
if ((tp->t_frextents_delta != 0) &&
1035
(tp->t_flags & XFS_TRANS_SB_DIRTY))
1036
rtxdelta += tp->t_frextents_delta;
1038
if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
1039
(tp->t_flags & XFS_TRANS_SB_DIRTY)) {
1040
idelta = tp->t_icount_delta;
1041
ifreedelta = tp->t_ifree_delta;
1044
/* apply the per-cpu counters */
1046
error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
1053
error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT,
1056
goto out_undo_fdblocks;
1060
error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE,
1063
goto out_undo_icount;
1066
/* apply remaining deltas */
1067
if (rtxdelta != 0) {
1068
msbp->msb_field = XFS_SBS_FREXTENTS;
1069
msbp->msb_delta = rtxdelta;
1073
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
1074
if (tp->t_dblocks_delta != 0) {
1075
msbp->msb_field = XFS_SBS_DBLOCKS;
1076
msbp->msb_delta = tp->t_dblocks_delta;
1079
if (tp->t_agcount_delta != 0) {
1080
msbp->msb_field = XFS_SBS_AGCOUNT;
1081
msbp->msb_delta = tp->t_agcount_delta;
1084
if (tp->t_imaxpct_delta != 0) {
1085
msbp->msb_field = XFS_SBS_IMAX_PCT;
1086
msbp->msb_delta = tp->t_imaxpct_delta;
1089
if (tp->t_rextsize_delta != 0) {
1090
msbp->msb_field = XFS_SBS_REXTSIZE;
1091
msbp->msb_delta = tp->t_rextsize_delta;
1094
if (tp->t_rbmblocks_delta != 0) {
1095
msbp->msb_field = XFS_SBS_RBMBLOCKS;
1096
msbp->msb_delta = tp->t_rbmblocks_delta;
1099
if (tp->t_rblocks_delta != 0) {
1100
msbp->msb_field = XFS_SBS_RBLOCKS;
1101
msbp->msb_delta = tp->t_rblocks_delta;
1104
if (tp->t_rextents_delta != 0) {
1105
msbp->msb_field = XFS_SBS_REXTENTS;
1106
msbp->msb_delta = tp->t_rextents_delta;
1109
if (tp->t_rextslog_delta != 0) {
1110
msbp->msb_field = XFS_SBS_REXTSLOG;
1111
msbp->msb_delta = tp->t_rextslog_delta;
1117
* If we need to change anything, do it.
1120
error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
1121
(uint)(msbp - msb), rsvd);
1123
goto out_undo_ifreecount;
1128
out_undo_ifreecount:
1130
xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd);
1133
xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd);
1136
xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd);
1143
* Add the given log item to the transaction's list of log items.
1145
* The log item will now point to its new descriptor with its li_desc field.
1149
struct xfs_trans *tp,
1150
struct xfs_log_item *lip)
1152
struct xfs_log_item_desc *lidp;
1154
ASSERT(lip->li_mountp = tp->t_mountp);
1155
ASSERT(lip->li_ailp = tp->t_mountp->m_ail);
1157
lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
1159
lidp->lid_item = lip;
1160
lidp->lid_flags = 0;
1162
list_add_tail(&lidp->lid_trans, &tp->t_items);
1164
lip->li_desc = lidp;
1168
xfs_trans_free_item_desc(
1169
struct xfs_log_item_desc *lidp)
1171
list_del_init(&lidp->lid_trans);
1172
kmem_zone_free(xfs_log_item_desc_zone, lidp);
1176
* Unlink and free the given descriptor.
1180
struct xfs_log_item *lip)
1182
xfs_trans_free_item_desc(lip->li_desc);
1183
lip->li_desc = NULL;
1187
* Unlock all of the items of a transaction and free all the descriptors
1188
* of that transaction.
1191
xfs_trans_free_items(
1192
struct xfs_trans *tp,
1193
xfs_lsn_t commit_lsn,
1196
struct xfs_log_item_desc *lidp, *next;
1198
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
1199
struct xfs_log_item *lip = lidp->lid_item;
1201
lip->li_desc = NULL;
1203
if (commit_lsn != NULLCOMMITLSN)
1204
IOP_COMMITTING(lip, commit_lsn);
1205
if (flags & XFS_TRANS_ABORT)
1206
lip->li_flags |= XFS_LI_ABORTED;
1209
xfs_trans_free_item_desc(lidp);
1214
* Unlock the items associated with a transaction.
1216
* Items which were not logged should be freed. Those which were logged must
1217
* still be tracked so they can be unpinned when the transaction commits.
1220
xfs_trans_unlock_items(
1221
struct xfs_trans *tp,
1222
xfs_lsn_t commit_lsn)
1224
struct xfs_log_item_desc *lidp, *next;
1226
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
1227
struct xfs_log_item *lip = lidp->lid_item;
1229
lip->li_desc = NULL;
1231
if (commit_lsn != NULLCOMMITLSN)
1232
IOP_COMMITTING(lip, commit_lsn);
1236
* Free the descriptor if the item is not dirty
1237
* within this transaction.
1239
if (!(lidp->lid_flags & XFS_LID_DIRTY))
1240
xfs_trans_free_item_desc(lidp);
1245
* Total up the number of log iovecs needed to commit this
1246
* transaction. The transaction itself needs one for the
1247
* transaction header. Ask each dirty item in turn how many
1248
* it needs to get the total.
1251
xfs_trans_count_vecs(
1252
struct xfs_trans *tp)
1255
struct xfs_log_item_desc *lidp;
1259
/* In the non-debug case we need to start bailing out if we
1260
* didn't find a log_item here, return zero and let trans_commit
1263
if (list_empty(&tp->t_items)) {
1268
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
1270
* Skip items which aren't dirty in this transaction.
1272
if (!(lidp->lid_flags & XFS_LID_DIRTY))
1274
lidp->lid_size = IOP_SIZE(lidp->lid_item);
1275
nvecs += lidp->lid_size;
1282
* Fill in the vector with pointers to data to be logged
1283
* by this transaction. The transaction header takes
1284
* the first vector, and then each dirty item takes the
1285
* number of vectors it indicated it needed in xfs_trans_count_vecs().
1287
* As each item fills in the entries it needs, also pin the item
1288
* so that it cannot be flushed out until the log write completes.
1291
xfs_trans_fill_vecs(
1292
struct xfs_trans *tp,
1293
struct xfs_log_iovec *log_vector)
1295
struct xfs_log_item_desc *lidp;
1296
struct xfs_log_iovec *vecp;
1300
* Skip over the entry for the transaction header, we'll
1301
* fill that in at the end.
1303
vecp = log_vector + 1;
1306
ASSERT(!list_empty(&tp->t_items));
1307
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
1308
/* Skip items which aren't dirty in this transaction. */
1309
if (!(lidp->lid_flags & XFS_LID_DIRTY))
1313
* The item may be marked dirty but not log anything. This can
1314
* be used to get called when a transaction is committed.
1318
IOP_FORMAT(lidp->lid_item, vecp);
1319
vecp += lidp->lid_size;
1320
IOP_PIN(lidp->lid_item);
1324
* Now that we've counted the number of items in this transaction, fill
1325
* in the transaction header. Note that the transaction header does not
1328
tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC;
1329
tp->t_header.th_type = tp->t_type;
1330
tp->t_header.th_num_items = nitems;
1331
log_vector->i_addr = (xfs_caddr_t)&tp->t_header;
1332
log_vector->i_len = sizeof(xfs_trans_header_t);
1333
log_vector->i_type = XLOG_REG_TYPE_TRANSHDR;
1337
* The committed item processing consists of calling the committed routine of
1338
* each logged item, updating the item's position in the AIL if necessary, and
1339
* unpinning each item. If the committed routine returns -1, then do nothing
1340
* further with the item because it may have been freed.
1342
* Since items are unlocked when they are copied to the incore log, it is
1343
* possible for two transactions to be completing and manipulating the same
1344
* item simultaneously. The AIL lock will protect the lsn field of each item.
1345
* The value of this field can never go backwards.
1347
* We unpin the items after repositioning them in the AIL, because otherwise
1348
* they could be immediately flushed and we'd have to race with the flusher
1349
* trying to pull the item from the AIL as we add it.
1352
xfs_trans_item_committed(
1353
struct xfs_log_item *lip,
1354
xfs_lsn_t commit_lsn,
1358
struct xfs_ail *ailp;
1361
lip->li_flags |= XFS_LI_ABORTED;
1362
item_lsn = IOP_COMMITTED(lip, commit_lsn);
1364
/* item_lsn of -1 means the item needs no further processing */
1365
if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
1369
* If the returned lsn is greater than what it contained before, update
1370
* the location of the item in the AIL. If it is not, then do nothing.
1371
* Items can never move backwards in the AIL.
1373
* While the new lsn should usually be greater, it is possible that a
1374
* later transaction completing simultaneously with an earlier one
1375
* using the same item could complete first with a higher lsn. This
1376
* would cause the earlier transaction to fail the test below.
1378
ailp = lip->li_ailp;
1379
spin_lock(&ailp->xa_lock);
1380
if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) {
1382
* This will set the item's lsn to item_lsn and update the
1383
* position of the item in the AIL.
1385
* xfs_trans_ail_update() drops the AIL lock.
1387
xfs_trans_ail_update(ailp, lip, item_lsn);
1389
spin_unlock(&ailp->xa_lock);
1393
* Now that we've repositioned the item in the AIL, unpin it so it can
1394
* be flushed. Pass information about buffer stale state down from the
1395
* log item flags, if anyone else stales the buffer we do not want to
1396
* pay any attention to it.
1402
* This is typically called by the LM when a transaction has been fully
1403
* committed to disk. It needs to unpin the items which have
1404
* been logged by the transaction and update their positions
1405
* in the AIL if necessary.
1407
* This also gets called when the transactions didn't get written out
1408
* because of an I/O error. Abortflag & XFS_LI_ABORTED is set then.
1411
xfs_trans_committed(
1415
struct xfs_trans *tp = arg;
1416
struct xfs_log_item_desc *lidp, *next;
1418
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
1419
xfs_trans_item_committed(lidp->lid_item, tp->t_lsn, abortflag);
1420
xfs_trans_free_item_desc(lidp);
1427
xfs_log_item_batch_insert(
1428
struct xfs_ail *ailp,
1429
struct xfs_ail_cursor *cur,
1430
struct xfs_log_item **log_items,
1432
xfs_lsn_t commit_lsn)
1436
spin_lock(&ailp->xa_lock);
1437
/* xfs_trans_ail_update_bulk drops ailp->xa_lock */
1438
xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
1440
for (i = 0; i < nr_items; i++)
1441
IOP_UNPIN(log_items[i], 0);
1445
* Bulk operation version of xfs_trans_committed that takes a log vector of
1446
* items to insert into the AIL. This uses bulk AIL insertion techniques to
1447
* minimise lock traffic.
1449
* If we are called with the aborted flag set, it is because a log write during
1450
* a CIL checkpoint commit has failed. In this case, all the items in the
1451
* checkpoint have already gone through IOP_COMMITED and IOP_UNLOCK, which
1452
* means that checkpoint commit abort handling is treated exactly the same
1453
* as an iclog write error even though we haven't started any IO yet. Hence in
1454
* this case all we need to do is IOP_COMMITTED processing, followed by an
1455
* IOP_UNPIN(aborted) call.
1457
* The AIL cursor is used to optimise the insert process. If commit_lsn is not
1458
* at the end of the AIL, the insert cursor avoids the need to walk
1459
* the AIL to find the insertion point on every xfs_log_item_batch_insert()
1460
* call. This saves a lot of needless list walking and is a net win, even
1461
* though it slightly increases that amount of AIL lock traffic to set it up
1465
xfs_trans_committed_bulk(
1466
struct xfs_ail *ailp,
1467
struct xfs_log_vec *log_vector,
1468
xfs_lsn_t commit_lsn,
1471
#define LOG_ITEM_BATCH_SIZE 32
1472
struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
1473
struct xfs_log_vec *lv;
1474
struct xfs_ail_cursor cur;
1477
spin_lock(&ailp->xa_lock);
1478
xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
1479
spin_unlock(&ailp->xa_lock);
1481
/* unpin all the log items */
1482
for (lv = log_vector; lv; lv = lv->lv_next ) {
1483
struct xfs_log_item *lip = lv->lv_item;
1487
lip->li_flags |= XFS_LI_ABORTED;
1488
item_lsn = IOP_COMMITTED(lip, commit_lsn);
1490
/* item_lsn of -1 means the item needs no further processing */
1491
if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
1495
* if we are aborting the operation, no point in inserting the
1496
* object into the AIL as we are in a shutdown situation.
1499
ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount));
1504
if (item_lsn != commit_lsn) {
1507
* Not a bulk update option due to unusual item_lsn.
1508
* Push into AIL immediately, rechecking the lsn once
1509
* we have the ail lock. Then unpin the item. This does
1510
* not affect the AIL cursor the bulk insert path is
1513
spin_lock(&ailp->xa_lock);
1514
if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
1515
xfs_trans_ail_update(ailp, lip, item_lsn);
1517
spin_unlock(&ailp->xa_lock);
1522
/* Item is a candidate for bulk AIL insert. */
1523
log_items[i++] = lv->lv_item;
1524
if (i >= LOG_ITEM_BATCH_SIZE) {
1525
xfs_log_item_batch_insert(ailp, &cur, log_items,
1526
LOG_ITEM_BATCH_SIZE, commit_lsn);
1531
/* make sure we insert the remainder! */
1533
xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
1535
spin_lock(&ailp->xa_lock);
1536
xfs_trans_ail_cursor_done(ailp, &cur);
1537
spin_unlock(&ailp->xa_lock);
1541
* Called from the trans_commit code when we notice that the filesystem is in
1542
* the middle of a forced shutdown.
1544
* When we are called here, we have already pinned all the items in the
1545
* transaction. However, neither IOP_COMMITTING or IOP_UNLOCK has been called
1546
* so we can simply walk the items in the transaction, unpin them with an abort
1547
* flag and then free the items. Note that unpinning the items can result in
1548
* them being freed immediately, so we need to use a safe list traversal method
1553
struct xfs_trans *tp,
1556
struct xfs_log_item_desc *lidp, *n;
1558
list_for_each_entry_safe(lidp, n, &tp->t_items, lid_trans) {
1559
if (lidp->lid_flags & XFS_LID_DIRTY)
1560
IOP_UNPIN(lidp->lid_item, 1);
1563
xfs_trans_unreserve_and_mod_sb(tp);
1564
xfs_trans_unreserve_and_mod_dquots(tp);
1566
xfs_trans_free_items(tp, NULLCOMMITLSN, flags);
1571
* Format the transaction direct to the iclog. This isolates the physical
1572
* transaction commit operation from the logical operation and hence allows
1573
* other methods to be introduced without affecting the existing commit path.
1576
xfs_trans_commit_iclog(
1577
struct xfs_mount *mp,
1578
struct xfs_trans *tp,
1579
xfs_lsn_t *commit_lsn,
1585
struct xlog_in_core *commit_iclog;
1586
#define XFS_TRANS_LOGVEC_COUNT 16
1587
struct xfs_log_iovec log_vector_fast[XFS_TRANS_LOGVEC_COUNT];
1588
struct xfs_log_iovec *log_vector;
1593
* Ask each log item how many log_vector entries it will
1594
* need so we can figure out how many to allocate.
1595
* Try to avoid the kmem_alloc() call in the common case
1596
* by using a vector from the stack when it fits.
1598
nvec = xfs_trans_count_vecs(tp);
1600
return ENOMEM; /* triggers a shutdown! */
1601
} else if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
1602
log_vector = log_vector_fast;
1604
log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec *
1605
sizeof(xfs_log_iovec_t),
1610
* Fill in the log_vector and pin the logged items, and
1611
* then write the transaction to the log.
1613
xfs_trans_fill_vecs(tp, log_vector);
1615
if (flags & XFS_TRANS_RELEASE_LOG_RES)
1616
log_flags = XFS_LOG_REL_PERM_RESERV;
1618
error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn));
1621
* The transaction is committed incore here, and can go out to disk
1622
* at any time after this call. However, all the items associated
1623
* with the transaction are still locked and pinned in memory.
1625
*commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags);
1627
tp->t_commit_lsn = *commit_lsn;
1628
trace_xfs_trans_commit_lsn(tp);
1630
if (nvec > XFS_TRANS_LOGVEC_COUNT)
1631
kmem_free(log_vector);
1634
* If we got a log write error. Unpin the logitems that we
1635
* had pinned, clean up, free trans structure, and return error.
1637
if (error || *commit_lsn == -1) {
1638
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1639
xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT);
1640
return XFS_ERROR(EIO);
1644
* Once the transaction has committed, unused
1645
* reservations need to be released and changes to
1646
* the superblock need to be reflected in the in-core
1647
* version. Do that now.
1649
xfs_trans_unreserve_and_mod_sb(tp);
1652
* Tell the LM to call the transaction completion routine
1653
* when the log write with LSN commit_lsn completes (e.g.
1654
* when the transaction commit really hits the on-disk log).
1655
* After this call we cannot reference tp, because the call
1656
* can happen at any time and the call will free the transaction
1657
* structure pointed to by tp. The only case where we call
1658
* the completion routine (xfs_trans_committed) directly is
1659
* if the log is turned off on a debug kernel or we're
1660
* running in simulation mode (the log is explicitly turned
1663
tp->t_logcb.cb_func = xfs_trans_committed;
1664
tp->t_logcb.cb_arg = tp;
1667
* We need to pass the iclog buffer which was used for the
1668
* transaction commit record into this function, and attach
1669
* the callback to it. The callback must be attached before
1670
* the items are unlocked to avoid racing with other threads
1671
* waiting for an item to unlock.
1673
shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb));
1676
* Mark this thread as no longer being in a transaction
1678
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1681
* Once all the items of the transaction have been copied
1682
* to the in core log and the callback is attached, the
1683
* items can be unlocked.
1685
* This will free descriptors pointing to items which were
1686
* not logged since there is nothing more to do with them.
1687
* For items which were logged, we will keep pointers to them
1688
* so they can be unpinned after the transaction commits to disk.
1689
* This will also stamp each modified meta-data item with
1690
* the commit lsn of this transaction for dependency tracking
1693
xfs_trans_unlock_items(tp, *commit_lsn);
1696
* If we detected a log error earlier, finish committing
1697
* the transaction now (unpin log items, etc).
1699
* Order is critical here, to avoid using the transaction
1700
* pointer after its been freed (by xfs_trans_committed
1701
* either here now, or as a callback). We cannot do this
1702
* step inside xfs_log_notify as was done earlier because
1706
xfs_trans_committed(tp, XFS_LI_ABORTED);
1709
* Now that the xfs_trans_committed callback has been attached,
1710
* and the items are released we can finally allow the iclog to
1713
return xfs_log_release_iclog(mp, commit_iclog);
1717
* Walk the log items and allocate log vector structures for
1718
* each item large enough to fit all the vectors they require.
1719
* Note that this format differs from the old log vector format in
1720
* that there is no transaction header in these log vectors.
1722
STATIC struct xfs_log_vec *
1723
xfs_trans_alloc_log_vecs(
1726
struct xfs_log_item_desc *lidp;
1727
struct xfs_log_vec *lv = NULL;
1728
struct xfs_log_vec *ret_lv = NULL;
1731
/* Bail out if we didn't find a log item. */
1732
if (list_empty(&tp->t_items)) {
1737
list_for_each_entry(lidp, &tp->t_items, lid_trans) {
1738
struct xfs_log_vec *new_lv;
1740
/* Skip items which aren't dirty in this transaction. */
1741
if (!(lidp->lid_flags & XFS_LID_DIRTY))
1744
/* Skip items that do not have any vectors for writing */
1745
lidp->lid_size = IOP_SIZE(lidp->lid_item);
1746
if (!lidp->lid_size)
1749
new_lv = kmem_zalloc(sizeof(*new_lv) +
1750
lidp->lid_size * sizeof(struct xfs_log_iovec),
1753
/* The allocated iovec region lies beyond the log vector. */
1754
new_lv->lv_iovecp = (struct xfs_log_iovec *)&new_lv[1];
1755
new_lv->lv_niovecs = lidp->lid_size;
1756
new_lv->lv_item = lidp->lid_item;
1760
lv->lv_next = new_lv;
1768
xfs_trans_commit_cil(
1769
struct xfs_mount *mp,
1770
struct xfs_trans *tp,
1771
xfs_lsn_t *commit_lsn,
1774
struct xfs_log_vec *log_vector;
1777
* Get each log item to allocate a vector structure for
1778
* the log item to to pass to the log write code. The
1779
* CIL commit code will format the vector and save it away.
1781
log_vector = xfs_trans_alloc_log_vecs(tp);
1785
xfs_log_commit_cil(mp, tp, log_vector, commit_lsn, flags);
1787
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1793
* Commit the given transaction to the log.
1795
* XFS disk error handling mechanism is not based on a typical
1796
* transaction abort mechanism. Logically after the filesystem
1797
* gets marked 'SHUTDOWN', we can't let any new transactions
1798
* be durable - ie. committed to disk - because some metadata might
1799
* be inconsistent. In such cases, this returns an error, and the
1800
* caller may assume that all locked objects joined to the transaction
1801
* have already been unlocked as if the commit had succeeded.
1802
* Do not reference the transaction structure after this call.
1806
struct xfs_trans *tp,
1809
struct xfs_mount *mp = tp->t_mountp;
1810
xfs_lsn_t commit_lsn = -1;
1813
int sync = tp->t_flags & XFS_TRANS_SYNC;
1816
* Determine whether this commit is releasing a permanent
1817
* log reservation or not.
1819
if (flags & XFS_TRANS_RELEASE_LOG_RES) {
1820
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
1821
log_flags = XFS_LOG_REL_PERM_RESERV;
1825
* If there is nothing to be logged by the transaction,
1826
* then unlock all of the items associated with the
1827
* transaction and free the transaction structure.
1828
* Also make sure to return any reserved blocks to
1831
if (!(tp->t_flags & XFS_TRANS_DIRTY))
1834
if (XFS_FORCED_SHUTDOWN(mp)) {
1835
error = XFS_ERROR(EIO);
1839
ASSERT(tp->t_ticket != NULL);
1842
* If we need to update the superblock, then do it now.
1844
if (tp->t_flags & XFS_TRANS_SB_DIRTY)
1845
xfs_trans_apply_sb_deltas(tp);
1846
xfs_trans_apply_dquot_deltas(tp);
1848
if (mp->m_flags & XFS_MOUNT_DELAYLOG)
1849
error = xfs_trans_commit_cil(mp, tp, &commit_lsn, flags);
1851
error = xfs_trans_commit_iclog(mp, tp, &commit_lsn, flags);
1853
if (error == ENOMEM) {
1854
xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
1855
error = XFS_ERROR(EIO);
1860
* If the transaction needs to be synchronous, then force the
1861
* log out now and wait for it.
1865
error = _xfs_log_force_lsn(mp, commit_lsn,
1866
XFS_LOG_SYNC, NULL);
1868
XFS_STATS_INC(xs_trans_sync);
1870
XFS_STATS_INC(xs_trans_async);
1876
xfs_trans_unreserve_and_mod_sb(tp);
1879
* It is indeed possible for the transaction to be not dirty but
1880
* the dqinfo portion to be. All that means is that we have some
1881
* (non-persistent) quota reservations that need to be unreserved.
1883
xfs_trans_unreserve_and_mod_dquots(tp);
1885
commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
1886
if (commit_lsn == -1 && !error)
1887
error = XFS_ERROR(EIO);
1889
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1890
xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0);
1893
XFS_STATS_INC(xs_trans_empty);
1898
* Unlock all of the transaction's items and free the transaction.
1899
* The transaction must not have modified any of its items, because
1900
* there is no way to restore them to their previous state.
1902
* If the transaction has made a log reservation, make sure to release
1911
xfs_mount_t *mp = tp->t_mountp;
1914
* See if the caller is being too lazy to figure out if
1915
* the transaction really needs an abort.
1917
if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY))
1918
flags &= ~XFS_TRANS_ABORT;
1920
* See if the caller is relying on us to shut down the
1921
* filesystem. This happens in paths where we detect
1922
* corruption and decide to give up.
1924
if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) {
1925
XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
1926
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1929
if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) {
1930
struct xfs_log_item_desc *lidp;
1932
list_for_each_entry(lidp, &tp->t_items, lid_trans)
1933
ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
1936
xfs_trans_unreserve_and_mod_sb(tp);
1937
xfs_trans_unreserve_and_mod_dquots(tp);
1940
if (flags & XFS_TRANS_RELEASE_LOG_RES) {
1941
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
1942
log_flags = XFS_LOG_REL_PERM_RESERV;
1946
xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
1949
/* mark this thread as no longer being in a transaction */
1950
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1952
xfs_trans_free_items(tp, NULLCOMMITLSN, flags);
1957
* Roll from one trans in the sequence of PERMANENT transactions to
1958
* the next: permanent transactions are only flushed out when
1959
* committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
1960
* as possible to let chunks of it go to the log. So we commit the
1961
* chunk we've been working on and get a new transaction to continue.
1965
struct xfs_trans **tpp,
1966
struct xfs_inode *dp)
1968
struct xfs_trans *trans;
1969
unsigned int logres, count;
1973
* Ensure that the inode is always logged.
1976
xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
1979
* Copy the critical parameters from one trans to the next.
1981
logres = trans->t_log_res;
1982
count = trans->t_log_count;
1983
*tpp = xfs_trans_dup(trans);
1986
* Commit the current transaction.
1987
* If this commit failed, then it'd just unlock those items that
1988
* are not marked ihold. That also means that a filesystem shutdown
1989
* is in progress. The caller takes the responsibility to cancel
1990
* the duplicate transaction that gets returned.
1992
error = xfs_trans_commit(trans, 0);
1999
* transaction commit worked ok so we can drop the extra ticket
2000
* reference that we gained in xfs_trans_dup()
2002
xfs_log_ticket_put(trans->t_ticket);
2006
* Reserve space in the log for th next transaction.
2007
* This also pushes items in the "AIL", the list of logged items,
2008
* out to disk if they are taking up space at the tail of the log
2009
* that we want to use. This requires that either nothing be locked
2010
* across this call, or that anything that is locked be logged in
2011
* the prior and the next transactions.
2013
error = xfs_trans_reserve(trans, 0, logres, 0,
2014
XFS_TRANS_PERM_LOG_RES, count);
2016
* Ensure that the inode is in the new transaction and locked.
2021
xfs_trans_ijoin(trans, dp, 0);