blob: 06ed520a767f99f06c43cd7cb30055d009b87ebd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
Christoph Hellwige98c4142010-06-23 18:11:15 +10003 * Copyright (C) 2010 Red Hat, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11004 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
Nathan Scott7b718762005-11-02 14:58:39 +11006 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * published by the Free Software Foundation.
9 *
Nathan Scott7b718762005-11-02 14:58:39 +110010 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 *
Nathan Scott7b718762005-11-02 14:58:39 +110015 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_types.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_mount.h"
27#include "xfs_error.h"
Nathan Scotta844f452005-11-02 14:38:42 +110028#include "xfs_da_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110030#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_ialloc_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_dinode.h"
33#include "xfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_btree.h"
35#include "xfs_ialloc.h"
36#include "xfs_alloc.h"
Dave Chinnerefc27b52012-04-29 10:39:43 +000037#include "xfs_extent_busy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "xfs_quota.h"
Nathan Scotta844f452005-11-02 14:38:42 +110040#include "xfs_trans_priv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "xfs_trans_space.h"
Niv Sardi322ff6b2008-08-13 16:05:49 +100042#include "xfs_inode_item.h"
Dave Chinnered3b4d62010-05-21 12:07:08 +100043#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Nathan Scott8f794052006-03-14 13:32:41 +110045kmem_zone_t *xfs_trans_zone;
Christoph Hellwige98c4142010-06-23 18:11:15 +100046kmem_zone_t *xfs_log_item_desc_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Christoph Hellwig025101d2010-05-04 13:53:48 +000048
Linus Torvalds1da177e2005-04-16 15:20:36 -070049/*
Christoph Hellwig025101d2010-05-04 13:53:48 +000050 * Various log reservation values.
51 *
52 * These are based on the size of the file system block because that is what
53 * most transactions manipulate. Each adds in an additional 128 bytes per
54 * item logged to try to account for the overhead of the transaction mechanism.
55 *
56 * Note: Most of the reservations underestimate the number of allocation
57 * groups into which they could free extents in the xfs_bmap_finish() call.
58 * This is because the number in the worst case is quite high and quite
59 * unusual. In order to fix this we need to change xfs_bmap_finish() to free
60 * extents in only a single AG at a time. This will require changes to the
61 * EFI code as well, however, so that the EFI for the extents not freed is
62 * logged again in each transaction. See SGI PV #261917.
63 *
64 * Reservation functions here avoid a huge stack in xfs_trans_init due to
65 * register overflow from temporaries in the calculations.
66 */
67
68
69/*
70 * In a write transaction we can allocate a maximum of 2
71 * extents. This gives:
72 * the inode getting the new extents: inode size
73 * the inode's bmap btree: max depth * block size
74 * the agfs of the ags from which the extents are allocated: 2 * sector
75 * the superblock free block counter: sector size
76 * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
77 * And the bmap_finish transaction can free bmap blocks in a join:
78 * the agfs of the ags containing the blocks: 2 * sector size
79 * the agfls of the ags containing the blocks: 2 * sector size
80 * the super block free block counter: sector size
81 * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
Nathan Scott8f794052006-03-14 13:32:41 +110082 */
Nathan Scott8f794052006-03-14 13:32:41 +110083STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +000084xfs_calc_write_reservation(
85 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +110086{
Christoph Hellwig025101d2010-05-04 13:53:48 +000087 return XFS_DQUOT_LOGRES(mp) +
88 MAX((mp->m_sb.sb_inodesize +
89 XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) +
90 2 * mp->m_sb.sb_sectsize +
91 mp->m_sb.sb_sectsize +
92 XFS_ALLOCFREE_LOG_RES(mp, 2) +
93 128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) +
94 XFS_ALLOCFREE_LOG_COUNT(mp, 2))),
95 (2 * mp->m_sb.sb_sectsize +
96 2 * mp->m_sb.sb_sectsize +
97 mp->m_sb.sb_sectsize +
98 XFS_ALLOCFREE_LOG_RES(mp, 2) +
99 128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
Nathan Scott8f794052006-03-14 13:32:41 +1100100}
101
Christoph Hellwig025101d2010-05-04 13:53:48 +0000102/*
103 * In truncating a file we free up to two extents at once. We can modify:
104 * the inode being truncated: inode size
105 * the inode's bmap btree: (max depth + 1) * block size
106 * And the bmap_finish transaction can free the blocks and bmap blocks:
107 * the agf for each of the ags: 4 * sector size
108 * the agfl for each of the ags: 4 * sector size
109 * the super block to reflect the freed blocks: sector size
110 * worst case split in allocation btrees per extent assuming 4 extents:
111 * 4 exts * 2 trees * (2 * max depth - 1) * block size
112 * the inode btree: max depth * blocksize
113 * the allocation btrees: 2 trees * (max depth - 1) * block size
114 */
Nathan Scott8f794052006-03-14 13:32:41 +1100115STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000116xfs_calc_itruncate_reservation(
117 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100118{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000119 return XFS_DQUOT_LOGRES(mp) +
120 MAX((mp->m_sb.sb_inodesize +
121 XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) +
122 128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK))),
123 (4 * mp->m_sb.sb_sectsize +
124 4 * mp->m_sb.sb_sectsize +
125 mp->m_sb.sb_sectsize +
126 XFS_ALLOCFREE_LOG_RES(mp, 4) +
127 128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4)) +
128 128 * 5 +
129 XFS_ALLOCFREE_LOG_RES(mp, 1) +
130 128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
131 XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
Nathan Scott8f794052006-03-14 13:32:41 +1100132}
133
Christoph Hellwig025101d2010-05-04 13:53:48 +0000134/*
135 * In renaming a files we can modify:
136 * the four inodes involved: 4 * inode size
137 * the two directory btrees: 2 * (max depth + v2) * dir block size
138 * the two directory bmap btrees: 2 * max depth * block size
139 * And the bmap_finish transaction can free dir and bmap blocks (two sets
140 * of bmap blocks) giving:
141 * the agf for the ags in which the blocks live: 3 * sector size
142 * the agfl for the ags in which the blocks live: 3 * sector size
143 * the superblock for the free block count: sector size
144 * the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
145 */
Nathan Scott8f794052006-03-14 13:32:41 +1100146STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000147xfs_calc_rename_reservation(
148 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100149{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000150 return XFS_DQUOT_LOGRES(mp) +
151 MAX((4 * mp->m_sb.sb_inodesize +
152 2 * XFS_DIROP_LOG_RES(mp) +
153 128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp))),
154 (3 * mp->m_sb.sb_sectsize +
155 3 * mp->m_sb.sb_sectsize +
156 mp->m_sb.sb_sectsize +
157 XFS_ALLOCFREE_LOG_RES(mp, 3) +
158 128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))));
Nathan Scott8f794052006-03-14 13:32:41 +1100159}
160
Christoph Hellwig025101d2010-05-04 13:53:48 +0000161/*
162 * For creating a link to an inode:
163 * the parent directory inode: inode size
164 * the linked inode: inode size
165 * the directory btree could split: (max depth + v2) * dir block size
166 * the directory bmap btree could join or split: (max depth + v2) * blocksize
167 * And the bmap_finish transaction can free some bmap blocks giving:
168 * the agf for the ag in which the blocks live: sector size
169 * the agfl for the ag in which the blocks live: sector size
170 * the superblock for the free block count: sector size
171 * the allocation btrees: 2 trees * (2 * max depth - 1) * block size
172 */
Nathan Scott8f794052006-03-14 13:32:41 +1100173STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000174xfs_calc_link_reservation(
175 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100176{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000177 return XFS_DQUOT_LOGRES(mp) +
178 MAX((mp->m_sb.sb_inodesize +
179 mp->m_sb.sb_inodesize +
180 XFS_DIROP_LOG_RES(mp) +
181 128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
182 (mp->m_sb.sb_sectsize +
183 mp->m_sb.sb_sectsize +
184 mp->m_sb.sb_sectsize +
185 XFS_ALLOCFREE_LOG_RES(mp, 1) +
186 128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
Nathan Scott8f794052006-03-14 13:32:41 +1100187}
188
Christoph Hellwig025101d2010-05-04 13:53:48 +0000189/*
190 * For removing a directory entry we can modify:
191 * the parent directory inode: inode size
192 * the removed inode: inode size
193 * the directory btree could join: (max depth + v2) * dir block size
194 * the directory bmap btree could join or split: (max depth + v2) * blocksize
195 * And the bmap_finish transaction can free the dir and bmap blocks giving:
196 * the agf for the ag in which the blocks live: 2 * sector size
197 * the agfl for the ag in which the blocks live: 2 * sector size
198 * the superblock for the free block count: sector size
199 * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
200 */
Nathan Scott8f794052006-03-14 13:32:41 +1100201STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000202xfs_calc_remove_reservation(
203 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100204{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000205 return XFS_DQUOT_LOGRES(mp) +
206 MAX((mp->m_sb.sb_inodesize +
207 mp->m_sb.sb_inodesize +
208 XFS_DIROP_LOG_RES(mp) +
209 128 * (2 + XFS_DIROP_LOG_COUNT(mp))),
210 (2 * mp->m_sb.sb_sectsize +
211 2 * mp->m_sb.sb_sectsize +
212 mp->m_sb.sb_sectsize +
213 XFS_ALLOCFREE_LOG_RES(mp, 2) +
214 128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
Nathan Scott8f794052006-03-14 13:32:41 +1100215}
216
Christoph Hellwig025101d2010-05-04 13:53:48 +0000217/*
218 * For symlink we can modify:
219 * the parent directory inode: inode size
220 * the new inode: inode size
221 * the inode btree entry: 1 block
222 * the directory btree: (max depth + v2) * dir block size
223 * the directory inode's bmap btree: (max depth + v2) * block size
224 * the blocks for the symlink: 1 kB
225 * Or in the first xact we allocate some inodes giving:
226 * the agi and agf of the ag getting the new inodes: 2 * sectorsize
227 * the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
228 * the inode btree: max depth * blocksize
229 * the allocation btrees: 2 trees * (2 * max depth - 1) * block size
230 */
Nathan Scott8f794052006-03-14 13:32:41 +1100231STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000232xfs_calc_symlink_reservation(
233 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100234{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000235 return XFS_DQUOT_LOGRES(mp) +
236 MAX((mp->m_sb.sb_inodesize +
237 mp->m_sb.sb_inodesize +
238 XFS_FSB_TO_B(mp, 1) +
239 XFS_DIROP_LOG_RES(mp) +
240 1024 +
241 128 * (4 + XFS_DIROP_LOG_COUNT(mp))),
242 (2 * mp->m_sb.sb_sectsize +
243 XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
244 XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
245 XFS_ALLOCFREE_LOG_RES(mp, 1) +
246 128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
247 XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
Nathan Scott8f794052006-03-14 13:32:41 +1100248}
249
Christoph Hellwig025101d2010-05-04 13:53:48 +0000250/*
251 * For create we can modify:
252 * the parent directory inode: inode size
253 * the new inode: inode size
254 * the inode btree entry: block size
255 * the superblock for the nlink flag: sector size
256 * the directory btree: (max depth + v2) * dir block size
257 * the directory inode's bmap btree: (max depth + v2) * block size
258 * Or in the first xact we allocate some inodes giving:
259 * the agi and agf of the ag getting the new inodes: 2 * sectorsize
260 * the superblock for the nlink flag: sector size
261 * the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
262 * the inode btree: max depth * blocksize
263 * the allocation btrees: 2 trees * (max depth - 1) * block size
264 */
Nathan Scott8f794052006-03-14 13:32:41 +1100265STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000266xfs_calc_create_reservation(
267 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100268{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000269 return XFS_DQUOT_LOGRES(mp) +
270 MAX((mp->m_sb.sb_inodesize +
271 mp->m_sb.sb_inodesize +
272 mp->m_sb.sb_sectsize +
273 XFS_FSB_TO_B(mp, 1) +
274 XFS_DIROP_LOG_RES(mp) +
275 128 * (3 + XFS_DIROP_LOG_COUNT(mp))),
276 (3 * mp->m_sb.sb_sectsize +
277 XFS_FSB_TO_B(mp, XFS_IALLOC_BLOCKS(mp)) +
278 XFS_FSB_TO_B(mp, mp->m_in_maxlevels) +
279 XFS_ALLOCFREE_LOG_RES(mp, 1) +
280 128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
281 XFS_ALLOCFREE_LOG_COUNT(mp, 1))));
Nathan Scott8f794052006-03-14 13:32:41 +1100282}
283
Christoph Hellwig025101d2010-05-04 13:53:48 +0000284/*
285 * Making a new directory is the same as creating a new file.
286 */
Nathan Scott8f794052006-03-14 13:32:41 +1100287STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000288xfs_calc_mkdir_reservation(
289 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100290{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000291 return xfs_calc_create_reservation(mp);
Nathan Scott8f794052006-03-14 13:32:41 +1100292}
293
Christoph Hellwig025101d2010-05-04 13:53:48 +0000294/*
295 * In freeing an inode we can modify:
296 * the inode being freed: inode size
297 * the super block free inode counter: sector size
298 * the agi hash list and counters: sector size
299 * the inode btree entry: block size
300 * the on disk inode before ours in the agi hash list: inode cluster size
301 * the inode btree: max depth * blocksize
302 * the allocation btrees: 2 trees * (max depth - 1) * block size
303 */
Nathan Scott8f794052006-03-14 13:32:41 +1100304STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000305xfs_calc_ifree_reservation(
306 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100307{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000308 return XFS_DQUOT_LOGRES(mp) +
309 mp->m_sb.sb_inodesize +
310 mp->m_sb.sb_sectsize +
311 mp->m_sb.sb_sectsize +
312 XFS_FSB_TO_B(mp, 1) +
313 MAX((__uint16_t)XFS_FSB_TO_B(mp, 1),
314 XFS_INODE_CLUSTER_SIZE(mp)) +
315 128 * 5 +
316 XFS_ALLOCFREE_LOG_RES(mp, 1) +
317 128 * (2 + XFS_IALLOC_BLOCKS(mp) + mp->m_in_maxlevels +
318 XFS_ALLOCFREE_LOG_COUNT(mp, 1));
Nathan Scott8f794052006-03-14 13:32:41 +1100319}
320
Christoph Hellwig025101d2010-05-04 13:53:48 +0000321/*
322 * When only changing the inode we log the inode and possibly the superblock
323 * We also add a bit of slop for the transaction stuff.
324 */
Nathan Scott8f794052006-03-14 13:32:41 +1100325STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000326xfs_calc_ichange_reservation(
327 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100328{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000329 return XFS_DQUOT_LOGRES(mp) +
330 mp->m_sb.sb_inodesize +
331 mp->m_sb.sb_sectsize +
332 512;
333
Nathan Scott8f794052006-03-14 13:32:41 +1100334}
335
Christoph Hellwig025101d2010-05-04 13:53:48 +0000336/*
337 * Growing the data section of the filesystem.
338 * superblock
339 * agi and agf
340 * allocation btrees
341 */
Nathan Scott8f794052006-03-14 13:32:41 +1100342STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000343xfs_calc_growdata_reservation(
344 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100345{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000346 return mp->m_sb.sb_sectsize * 3 +
347 XFS_ALLOCFREE_LOG_RES(mp, 1) +
348 128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1));
Nathan Scott8f794052006-03-14 13:32:41 +1100349}
350
Christoph Hellwig025101d2010-05-04 13:53:48 +0000351/*
352 * Growing the rt section of the filesystem.
353 * In the first set of transactions (ALLOC) we allocate space to the
354 * bitmap or summary files.
355 * superblock: sector size
356 * agf of the ag from which the extent is allocated: sector size
357 * bmap btree for bitmap/summary inode: max depth * blocksize
358 * bitmap/summary inode: inode size
359 * allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
360 */
Nathan Scott8f794052006-03-14 13:32:41 +1100361STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000362xfs_calc_growrtalloc_reservation(
363 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100364{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000365 return 2 * mp->m_sb.sb_sectsize +
366 XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) +
367 mp->m_sb.sb_inodesize +
368 XFS_ALLOCFREE_LOG_RES(mp, 1) +
369 128 * (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) +
370 XFS_ALLOCFREE_LOG_COUNT(mp, 1));
Nathan Scott8f794052006-03-14 13:32:41 +1100371}
372
Christoph Hellwig025101d2010-05-04 13:53:48 +0000373/*
374 * Growing the rt section of the filesystem.
375 * In the second set of transactions (ZERO) we zero the new metadata blocks.
376 * one bitmap/summary block: blocksize
377 */
Nathan Scott8f794052006-03-14 13:32:41 +1100378STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000379xfs_calc_growrtzero_reservation(
380 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100381{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000382 return mp->m_sb.sb_blocksize + 128;
Nathan Scott8f794052006-03-14 13:32:41 +1100383}
384
Christoph Hellwig025101d2010-05-04 13:53:48 +0000385/*
386 * Growing the rt section of the filesystem.
387 * In the third set of transactions (FREE) we update metadata without
388 * allocating any new blocks.
389 * superblock: sector size
390 * bitmap inode: inode size
391 * summary inode: inode size
392 * one bitmap block: blocksize
393 * summary blocks: new summary size
394 */
Nathan Scott8f794052006-03-14 13:32:41 +1100395STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000396xfs_calc_growrtfree_reservation(
397 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100398{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000399 return mp->m_sb.sb_sectsize +
400 2 * mp->m_sb.sb_inodesize +
401 mp->m_sb.sb_blocksize +
402 mp->m_rsumsize +
403 128 * 5;
Nathan Scott8f794052006-03-14 13:32:41 +1100404}
405
Christoph Hellwig025101d2010-05-04 13:53:48 +0000406/*
407 * Logging the inode modification timestamp on a synchronous write.
408 * inode
409 */
Nathan Scott8f794052006-03-14 13:32:41 +1100410STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000411xfs_calc_swrite_reservation(
412 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100413{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000414 return mp->m_sb.sb_inodesize + 128;
Nathan Scott8f794052006-03-14 13:32:41 +1100415}
416
Christoph Hellwig025101d2010-05-04 13:53:48 +0000417/*
418 * Logging the inode mode bits when writing a setuid/setgid file
419 * inode
420 */
Nathan Scott8f794052006-03-14 13:32:41 +1100421STATIC uint
422xfs_calc_writeid_reservation(xfs_mount_t *mp)
423{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000424 return mp->m_sb.sb_inodesize + 128;
Nathan Scott8f794052006-03-14 13:32:41 +1100425}
426
Christoph Hellwig025101d2010-05-04 13:53:48 +0000427/*
428 * Converting the inode from non-attributed to attributed.
429 * the inode being converted: inode size
430 * agf block and superblock (for block allocation)
431 * the new block (directory sized)
432 * bmap blocks for the new directory block
433 * allocation btrees
434 */
Nathan Scott8f794052006-03-14 13:32:41 +1100435STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000436xfs_calc_addafork_reservation(
437 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100438{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000439 return XFS_DQUOT_LOGRES(mp) +
440 mp->m_sb.sb_inodesize +
441 mp->m_sb.sb_sectsize * 2 +
442 mp->m_dirblksize +
443 XFS_FSB_TO_B(mp, XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) +
444 XFS_ALLOCFREE_LOG_RES(mp, 1) +
445 128 * (4 + XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1 +
446 XFS_ALLOCFREE_LOG_COUNT(mp, 1));
Nathan Scott8f794052006-03-14 13:32:41 +1100447}
448
Christoph Hellwig025101d2010-05-04 13:53:48 +0000449/*
450 * Removing the attribute fork of a file
451 * the inode being truncated: inode size
452 * the inode's bmap btree: max depth * block size
453 * And the bmap_finish transaction can free the blocks and bmap blocks:
454 * the agf for each of the ags: 4 * sector size
455 * the agfl for each of the ags: 4 * sector size
456 * the super block to reflect the freed blocks: sector size
457 * worst case split in allocation btrees per extent assuming 4 extents:
458 * 4 exts * 2 trees * (2 * max depth - 1) * block size
459 */
Nathan Scott8f794052006-03-14 13:32:41 +1100460STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000461xfs_calc_attrinval_reservation(
462 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100463{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000464 return MAX((mp->m_sb.sb_inodesize +
465 XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) +
466 128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))),
467 (4 * mp->m_sb.sb_sectsize +
468 4 * mp->m_sb.sb_sectsize +
469 mp->m_sb.sb_sectsize +
470 XFS_ALLOCFREE_LOG_RES(mp, 4) +
471 128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))));
Nathan Scott8f794052006-03-14 13:32:41 +1100472}
473
Christoph Hellwig025101d2010-05-04 13:53:48 +0000474/*
475 * Setting an attribute.
476 * the inode getting the attribute
477 * the superblock for allocations
478 * the agfs extents are allocated from
479 * the attribute btree * max depth
480 * the inode allocation btree
481 * Since attribute transaction space is dependent on the size of the attribute,
482 * the calculation is done partially at mount time and partially at runtime.
483 */
Nathan Scott8f794052006-03-14 13:32:41 +1100484STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000485xfs_calc_attrset_reservation(
486 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100487{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000488 return XFS_DQUOT_LOGRES(mp) +
489 mp->m_sb.sb_inodesize +
490 mp->m_sb.sb_sectsize +
491 XFS_FSB_TO_B(mp, XFS_DA_NODE_MAXDEPTH) +
492 128 * (2 + XFS_DA_NODE_MAXDEPTH);
Nathan Scott8f794052006-03-14 13:32:41 +1100493}
494
Christoph Hellwig025101d2010-05-04 13:53:48 +0000495/*
496 * Removing an attribute.
497 * the inode: inode size
498 * the attribute btree could join: max depth * block size
499 * the inode bmap btree could join or split: max depth * block size
500 * And the bmap_finish transaction can free the attr blocks freed giving:
501 * the agf for the ag in which the blocks live: 2 * sector size
502 * the agfl for the ag in which the blocks live: 2 * sector size
503 * the superblock for the free block count: sector size
504 * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
505 */
Nathan Scott8f794052006-03-14 13:32:41 +1100506STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000507xfs_calc_attrrm_reservation(
508 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100509{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000510 return XFS_DQUOT_LOGRES(mp) +
511 MAX((mp->m_sb.sb_inodesize +
512 XFS_FSB_TO_B(mp, XFS_DA_NODE_MAXDEPTH) +
513 XFS_FSB_TO_B(mp, XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) +
514 128 * (1 + XFS_DA_NODE_MAXDEPTH +
515 XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK))),
516 (2 * mp->m_sb.sb_sectsize +
517 2 * mp->m_sb.sb_sectsize +
518 mp->m_sb.sb_sectsize +
519 XFS_ALLOCFREE_LOG_RES(mp, 2) +
520 128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))));
Nathan Scott8f794052006-03-14 13:32:41 +1100521}
522
Christoph Hellwig025101d2010-05-04 13:53:48 +0000523/*
524 * Clearing a bad agino number in an agi hash bucket.
525 */
Nathan Scott8f794052006-03-14 13:32:41 +1100526STATIC uint
Christoph Hellwig025101d2010-05-04 13:53:48 +0000527xfs_calc_clear_agi_bucket_reservation(
528 struct xfs_mount *mp)
Nathan Scott8f794052006-03-14 13:32:41 +1100529{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000530 return mp->m_sb.sb_sectsize + 128;
Nathan Scott8f794052006-03-14 13:32:41 +1100531}
532
533/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 * Initialize the precomputed transaction reservation values
535 * in the mount structure.
536 */
537void
538xfs_trans_init(
Christoph Hellwig025101d2010-05-04 13:53:48 +0000539 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540{
Christoph Hellwig025101d2010-05-04 13:53:48 +0000541 struct xfs_trans_reservations *resp = &mp->m_reservations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
Nathan Scott8f794052006-03-14 13:32:41 +1100543 resp->tr_write = xfs_calc_write_reservation(mp);
544 resp->tr_itruncate = xfs_calc_itruncate_reservation(mp);
545 resp->tr_rename = xfs_calc_rename_reservation(mp);
546 resp->tr_link = xfs_calc_link_reservation(mp);
547 resp->tr_remove = xfs_calc_remove_reservation(mp);
548 resp->tr_symlink = xfs_calc_symlink_reservation(mp);
549 resp->tr_create = xfs_calc_create_reservation(mp);
550 resp->tr_mkdir = xfs_calc_mkdir_reservation(mp);
551 resp->tr_ifree = xfs_calc_ifree_reservation(mp);
552 resp->tr_ichange = xfs_calc_ichange_reservation(mp);
553 resp->tr_growdata = xfs_calc_growdata_reservation(mp);
554 resp->tr_swrite = xfs_calc_swrite_reservation(mp);
555 resp->tr_writeid = xfs_calc_writeid_reservation(mp);
556 resp->tr_addafork = xfs_calc_addafork_reservation(mp);
557 resp->tr_attrinval = xfs_calc_attrinval_reservation(mp);
558 resp->tr_attrset = xfs_calc_attrset_reservation(mp);
559 resp->tr_attrrm = xfs_calc_attrrm_reservation(mp);
560 resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp);
561 resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp);
562 resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp);
563 resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564}
565
566/*
567 * This routine is called to allocate a transaction structure.
568 * The type parameter indicates the type of the transaction. These
569 * are enumerated in xfs_trans.h.
Alex Elderb2ce3972011-07-11 09:51:44 -0500570 *
571 * Dynamically allocate the transaction structure from the transaction
572 * zone, initialize it, and return it to the caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 */
Alex Elderb2ce3972011-07-11 09:51:44 -0500574xfs_trans_t *
575xfs_trans_alloc(
576 xfs_mount_t *mp,
577 uint type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578{
Jan Karad9457dc2012-06-12 16:20:39 +0200579 xfs_trans_t *tp;
580
581 sb_start_intwrite(mp->m_super);
582 tp = _xfs_trans_alloc(mp, type, KM_SLEEP);
583 tp->t_flags |= XFS_TRANS_FREEZE_PROT;
584 return tp;
Alex Elderb2ce3972011-07-11 09:51:44 -0500585}
586
587xfs_trans_t *
588_xfs_trans_alloc(
589 xfs_mount_t *mp,
590 uint type,
Al Viro77ba7872012-04-02 06:24:04 -0400591 xfs_km_flags_t memflags)
Alex Elderb2ce3972011-07-11 09:51:44 -0500592{
593 xfs_trans_t *tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
Jan Karad9457dc2012-06-12 16:20:39 +0200595 WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE);
Nathan Scott34327e12006-06-09 17:11:55 +1000596 atomic_inc(&mp->m_active_trans);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
Christoph Hellwig80641dc2009-10-19 04:00:03 +0000598 tp = kmem_zone_zalloc(xfs_trans_zone, memflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 tp->t_magic = XFS_TRANS_MAGIC;
600 tp->t_type = type;
601 tp->t_mountp = mp;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000602 INIT_LIST_HEAD(&tp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000603 INIT_LIST_HEAD(&tp->t_busy);
Nathan Scott34327e12006-06-09 17:11:55 +1000604 return tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605}
606
607/*
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100608 * Free the transaction structure. If there is more clean up
609 * to do when the structure is freed, add it here.
610 */
611STATIC void
612xfs_trans_free(
Dave Chinnered3b4d62010-05-21 12:07:08 +1000613 struct xfs_trans *tp)
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100614{
Dave Chinner4ecbfe62012-04-29 10:41:10 +0000615 xfs_extent_busy_sort(&tp->t_busy);
616 xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000617
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100618 atomic_dec(&tp->t_mountp->m_active_trans);
Jan Karad9457dc2012-06-12 16:20:39 +0200619 if (tp->t_flags & XFS_TRANS_FREEZE_PROT)
620 sb_end_intwrite(tp->t_mountp->m_super);
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100621 xfs_trans_free_dqinfo(tp);
622 kmem_zone_free(xfs_trans_zone, tp);
623}
624
625/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 * This is called to create a new transaction which will share the
627 * permanent log reservation of the given transaction. The remaining
628 * unused block and rt extent reservations are also inherited. This
629 * implies that the original transaction is no longer allowed to allocate
630 * blocks. Locks and log items, however, are no inherited. They must
631 * be added to the new transaction explicitly.
632 */
633xfs_trans_t *
634xfs_trans_dup(
635 xfs_trans_t *tp)
636{
637 xfs_trans_t *ntp;
638
639 ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
640
641 /*
642 * Initialize the new transaction structure.
643 */
644 ntp->t_magic = XFS_TRANS_MAGIC;
645 ntp->t_type = tp->t_type;
646 ntp->t_mountp = tp->t_mountp;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000647 INIT_LIST_HEAD(&ntp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000648 INIT_LIST_HEAD(&ntp->t_busy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 ASSERT(tp->t_ticket != NULL);
Nathan Scottcfcbbbd2005-11-02 15:12:04 +1100652
Jan Karad9457dc2012-06-12 16:20:39 +0200653 ntp->t_flags = XFS_TRANS_PERM_LOG_RES |
654 (tp->t_flags & XFS_TRANS_RESERVE) |
655 (tp->t_flags & XFS_TRANS_FREEZE_PROT);
656 /* We gave our writer reference to the new transaction */
657 tp->t_flags &= ~XFS_TRANS_FREEZE_PROT;
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100658 ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
660 tp->t_blk_res = tp->t_blk_res_used;
661 ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
662 tp->t_rtx_res = tp->t_rtx_res_used;
Nathan Scott59c1b082006-06-09 14:59:13 +1000663 ntp->t_pflags = tp->t_pflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Christoph Hellwig7d095252009-06-08 15:33:32 +0200665 xfs_trans_dup_dqinfo(tp, ntp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667 atomic_inc(&tp->t_mountp->m_active_trans);
668 return ntp;
669}
670
671/*
672 * This is called to reserve free disk blocks and log space for the
673 * given transaction. This must be done before allocating any resources
674 * within the transaction.
675 *
676 * This will return ENOSPC if there are not enough blocks available.
677 * It will sleep waiting for available log space.
678 * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
679 * is used by long running transactions. If any one of the reservations
680 * fails then they will all be backed out.
681 *
682 * This does not do quota reservations. That typically is done by the
683 * caller afterwards.
684 */
685int
686xfs_trans_reserve(
687 xfs_trans_t *tp,
688 uint blocks,
689 uint logspace,
690 uint rtextents,
691 uint flags,
692 uint logcount)
693{
Nathan Scott59c1b082006-06-09 14:59:13 +1000694 int error = 0;
695 int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 /* Mark this thread as being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +1000698 current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700 /*
701 * Attempt to reserve the needed disk blocks by decrementing
702 * the number needed from the number available. This will
703 * fail if the count would go below zero.
704 */
705 if (blocks > 0) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000706 error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100707 -((int64_t)blocks), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 if (error != 0) {
Nathan Scott59c1b082006-06-09 14:59:13 +1000709 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 return (XFS_ERROR(ENOSPC));
711 }
712 tp->t_blk_res += blocks;
713 }
714
715 /*
716 * Reserve the log space needed for this transaction.
717 */
718 if (logspace > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000719 bool permanent = false;
720
721 ASSERT(tp->t_log_res == 0 || tp->t_log_res == logspace);
722 ASSERT(tp->t_log_count == 0 || tp->t_log_count == logcount);
723
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 if (flags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000726 permanent = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 } else {
728 ASSERT(tp->t_ticket == NULL);
729 ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 }
731
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000732 if (tp->t_ticket != NULL) {
733 ASSERT(flags & XFS_TRANS_PERM_LOG_RES);
734 error = xfs_log_regrant(tp->t_mountp, tp->t_ticket);
735 } else {
736 error = xfs_log_reserve(tp->t_mountp, logspace,
737 logcount, &tp->t_ticket,
738 XFS_TRANSACTION, permanent,
739 tp->t_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 }
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000741
742 if (error)
743 goto undo_blocks;
744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 tp->t_log_res = logspace;
746 tp->t_log_count = logcount;
747 }
748
749 /*
750 * Attempt to reserve the needed realtime extents by decrementing
751 * the number needed from the number available. This will
752 * fail if the count would go below zero.
753 */
754 if (rtextents > 0) {
755 error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100756 -((int64_t)rtextents), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 if (error) {
758 error = XFS_ERROR(ENOSPC);
759 goto undo_log;
760 }
761 tp->t_rtx_res += rtextents;
762 }
763
764 return 0;
765
766 /*
767 * Error cases jump to one of these labels to undo any
768 * reservations which have already been performed.
769 */
770undo_log:
771 if (logspace > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000772 int log_flags;
773
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 if (flags & XFS_TRANS_PERM_LOG_RES) {
775 log_flags = XFS_LOG_REL_PERM_RESERV;
776 } else {
777 log_flags = 0;
778 }
779 xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags);
780 tp->t_ticket = NULL;
781 tp->t_log_res = 0;
782 tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
783 }
784
785undo_blocks:
786 if (blocks > 0) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000787 xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100788 (int64_t)blocks, rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 tp->t_blk_res = 0;
790 }
791
Nathan Scott59c1b082006-06-09 14:59:13 +1000792 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
Nathan Scott59c1b082006-06-09 14:59:13 +1000794 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795}
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 * Record the indicated change to the given field for application
799 * to the file system's superblock when the transaction commits.
800 * For now, just store the change in the transaction structure.
801 *
802 * Mark the transaction structure to indicate that the superblock
803 * needs to be updated before committing.
David Chinner92821e22007-05-24 15:26:31 +1000804 *
805 * Because we may not be keeping track of allocated/free inodes and
806 * used filesystem blocks in the superblock, we do not mark the
807 * superblock dirty in this transaction if we modify these fields.
808 * We still need to update the transaction deltas so that they get
809 * applied to the incore superblock, but we don't want them to
810 * cause the superblock to get locked and logged if these are the
811 * only fields in the superblock that the transaction modifies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 */
813void
814xfs_trans_mod_sb(
815 xfs_trans_t *tp,
816 uint field,
David Chinner20f4ebf2007-02-10 18:36:10 +1100817 int64_t delta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818{
David Chinner92821e22007-05-24 15:26:31 +1000819 uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
820 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 switch (field) {
823 case XFS_TRANS_SB_ICOUNT:
824 tp->t_icount_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000825 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
826 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 break;
828 case XFS_TRANS_SB_IFREE:
829 tp->t_ifree_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000830 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
831 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 break;
833 case XFS_TRANS_SB_FDBLOCKS:
834 /*
835 * Track the number of blocks allocated in the
836 * transaction. Make sure it does not exceed the
837 * number reserved.
838 */
839 if (delta < 0) {
840 tp->t_blk_res_used += (uint)-delta;
841 ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
842 }
843 tp->t_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000844 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
845 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 break;
847 case XFS_TRANS_SB_RES_FDBLOCKS:
848 /*
849 * The allocation has already been applied to the
850 * in-core superblock's counter. This should only
851 * be applied to the on-disk superblock.
852 */
853 ASSERT(delta < 0);
854 tp->t_res_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000855 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
856 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 break;
858 case XFS_TRANS_SB_FREXTENTS:
859 /*
860 * Track the number of blocks allocated in the
861 * transaction. Make sure it does not exceed the
862 * number reserved.
863 */
864 if (delta < 0) {
865 tp->t_rtx_res_used += (uint)-delta;
866 ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
867 }
868 tp->t_frextents_delta += delta;
869 break;
870 case XFS_TRANS_SB_RES_FREXTENTS:
871 /*
872 * The allocation has already been applied to the
Nathan Scottc41564b2006-03-29 08:55:14 +1000873 * in-core superblock's counter. This should only
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 * be applied to the on-disk superblock.
875 */
876 ASSERT(delta < 0);
877 tp->t_res_frextents_delta += delta;
878 break;
879 case XFS_TRANS_SB_DBLOCKS:
880 ASSERT(delta > 0);
881 tp->t_dblocks_delta += delta;
882 break;
883 case XFS_TRANS_SB_AGCOUNT:
884 ASSERT(delta > 0);
885 tp->t_agcount_delta += delta;
886 break;
887 case XFS_TRANS_SB_IMAXPCT:
888 tp->t_imaxpct_delta += delta;
889 break;
890 case XFS_TRANS_SB_REXTSIZE:
891 tp->t_rextsize_delta += delta;
892 break;
893 case XFS_TRANS_SB_RBMBLOCKS:
894 tp->t_rbmblocks_delta += delta;
895 break;
896 case XFS_TRANS_SB_RBLOCKS:
897 tp->t_rblocks_delta += delta;
898 break;
899 case XFS_TRANS_SB_REXTENTS:
900 tp->t_rextents_delta += delta;
901 break;
902 case XFS_TRANS_SB_REXTSLOG:
903 tp->t_rextslog_delta += delta;
904 break;
905 default:
906 ASSERT(0);
907 return;
908 }
909
David Chinner210c6f12007-05-24 15:26:51 +1000910 tp->t_flags |= flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911}
912
913/*
914 * xfs_trans_apply_sb_deltas() is called from the commit code
915 * to bring the superblock buffer into the current transaction
916 * and modify it as requested by earlier calls to xfs_trans_mod_sb().
917 *
918 * For now we just look at each field allowed to change and change
919 * it if necessary.
920 */
921STATIC void
922xfs_trans_apply_sb_deltas(
923 xfs_trans_t *tp)
924{
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000925 xfs_dsb_t *sbp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 xfs_buf_t *bp;
927 int whole = 0;
928
929 bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
930 sbp = XFS_BUF_TO_SBP(bp);
931
932 /*
933 * Check that superblock mods match the mods made to AGF counters.
934 */
935 ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
936 (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
937 tp->t_ag_btree_delta));
938
David Chinner92821e22007-05-24 15:26:31 +1000939 /*
940 * Only update the superblock counters if we are logging them
941 */
942 if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000943 if (tp->t_icount_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800944 be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000945 if (tp->t_ifree_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800946 be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000947 if (tp->t_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800948 be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000949 if (tp->t_res_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800950 be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 }
952
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000953 if (tp->t_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800954 be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000955 if (tp->t_res_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800956 be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000957
958 if (tp->t_dblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800959 be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 whole = 1;
961 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000962 if (tp->t_agcount_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800963 be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 whole = 1;
965 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000966 if (tp->t_imaxpct_delta) {
967 sbp->sb_imax_pct += tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 whole = 1;
969 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000970 if (tp->t_rextsize_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800971 be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 whole = 1;
973 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000974 if (tp->t_rbmblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800975 be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 whole = 1;
977 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000978 if (tp->t_rblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800979 be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 whole = 1;
981 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000982 if (tp->t_rextents_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800983 be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 whole = 1;
985 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000986 if (tp->t_rextslog_delta) {
987 sbp->sb_rextslog += tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 whole = 1;
989 }
990
991 if (whole)
992 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000993 * Log the whole thing, the fields are noncontiguous.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000995 xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 else
997 /*
998 * Since all the modifiable fields are contiguous, we
999 * can get away with this.
1000 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +10001001 xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
1002 offsetof(xfs_dsb_t, sb_frextents) +
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 sizeof(sbp->sb_frextents) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004}
1005
1006/*
David Chinner45c34142007-06-18 16:49:44 +10001007 * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
1008 * and apply superblock counter changes to the in-core superblock. The
1009 * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
1010 * applied to the in-core superblock. The idea is that that has already been
1011 * done.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 *
1013 * This is done efficiently with a single call to xfs_mod_incore_sb_batch().
David Chinner45c34142007-06-18 16:49:44 +10001014 * However, we have to ensure that we only modify each superblock field only
1015 * once because the application of the delta values may not be atomic. That can
1016 * lead to ENOSPC races occurring if we have two separate modifcations of the
1017 * free space counter to put back the entire reservation and then take away
1018 * what we used.
1019 *
1020 * If we are not logging superblock counters, then the inode allocated/free and
1021 * used block counts are not updated in the on disk superblock. In this case,
1022 * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
1023 * still need to update the incore superblock with the changes.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 */
Dave Chinner71e330b2010-05-21 14:37:18 +10001025void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026xfs_trans_unreserve_and_mod_sb(
1027 xfs_trans_t *tp)
1028{
Christoph Hellwig1b040712010-09-30 02:25:56 +00001029 xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 xfs_mod_sb_t *msbp;
David Chinner92821e22007-05-24 15:26:31 +10001031 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 /* REFERENCED */
1033 int error;
1034 int rsvd;
David Chinner45c34142007-06-18 16:49:44 +10001035 int64_t blkdelta = 0;
1036 int64_t rtxdelta = 0;
Christoph Hellwig1b040712010-09-30 02:25:56 +00001037 int64_t idelta = 0;
1038 int64_t ifreedelta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 msbp = msb;
1041 rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
1042
Christoph Hellwig1b040712010-09-30 02:25:56 +00001043 /* calculate deltas */
David Chinner45c34142007-06-18 16:49:44 +10001044 if (tp->t_blk_res > 0)
1045 blkdelta = tp->t_blk_res;
David Chinner45c34142007-06-18 16:49:44 +10001046 if ((tp->t_fdblocks_delta != 0) &&
1047 (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
1048 (tp->t_flags & XFS_TRANS_SB_DIRTY)))
1049 blkdelta += tp->t_fdblocks_delta;
1050
David Chinner45c34142007-06-18 16:49:44 +10001051 if (tp->t_rtx_res > 0)
1052 rtxdelta = tp->t_rtx_res;
David Chinner45c34142007-06-18 16:49:44 +10001053 if ((tp->t_frextents_delta != 0) &&
1054 (tp->t_flags & XFS_TRANS_SB_DIRTY))
1055 rtxdelta += tp->t_frextents_delta;
1056
Christoph Hellwig1b040712010-09-30 02:25:56 +00001057 if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
1058 (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
1059 idelta = tp->t_icount_delta;
1060 ifreedelta = tp->t_ifree_delta;
1061 }
1062
1063 /* apply the per-cpu counters */
1064 if (blkdelta) {
1065 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
1066 blkdelta, rsvd);
1067 if (error)
1068 goto out;
1069 }
1070
1071 if (idelta) {
1072 error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT,
1073 idelta, rsvd);
1074 if (error)
1075 goto out_undo_fdblocks;
1076 }
1077
1078 if (ifreedelta) {
1079 error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE,
1080 ifreedelta, rsvd);
1081 if (error)
1082 goto out_undo_icount;
1083 }
1084
1085 /* apply remaining deltas */
David Chinner45c34142007-06-18 16:49:44 +10001086 if (rtxdelta != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 msbp->msb_field = XFS_SBS_FREXTENTS;
David Chinner45c34142007-06-18 16:49:44 +10001088 msbp->msb_delta = rtxdelta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 msbp++;
1090 }
1091
David Chinner92821e22007-05-24 15:26:31 +10001092 if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 if (tp->t_dblocks_delta != 0) {
1094 msbp->msb_field = XFS_SBS_DBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +11001095 msbp->msb_delta = tp->t_dblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 msbp++;
1097 }
1098 if (tp->t_agcount_delta != 0) {
1099 msbp->msb_field = XFS_SBS_AGCOUNT;
David Chinner20f4ebf2007-02-10 18:36:10 +11001100 msbp->msb_delta = tp->t_agcount_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 msbp++;
1102 }
1103 if (tp->t_imaxpct_delta != 0) {
1104 msbp->msb_field = XFS_SBS_IMAX_PCT;
David Chinner20f4ebf2007-02-10 18:36:10 +11001105 msbp->msb_delta = tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 msbp++;
1107 }
1108 if (tp->t_rextsize_delta != 0) {
1109 msbp->msb_field = XFS_SBS_REXTSIZE;
David Chinner20f4ebf2007-02-10 18:36:10 +11001110 msbp->msb_delta = tp->t_rextsize_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 msbp++;
1112 }
1113 if (tp->t_rbmblocks_delta != 0) {
1114 msbp->msb_field = XFS_SBS_RBMBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +11001115 msbp->msb_delta = tp->t_rbmblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 msbp++;
1117 }
1118 if (tp->t_rblocks_delta != 0) {
1119 msbp->msb_field = XFS_SBS_RBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +11001120 msbp->msb_delta = tp->t_rblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 msbp++;
1122 }
1123 if (tp->t_rextents_delta != 0) {
1124 msbp->msb_field = XFS_SBS_REXTENTS;
David Chinner20f4ebf2007-02-10 18:36:10 +11001125 msbp->msb_delta = tp->t_rextents_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 msbp++;
1127 }
1128 if (tp->t_rextslog_delta != 0) {
1129 msbp->msb_field = XFS_SBS_REXTSLOG;
David Chinner20f4ebf2007-02-10 18:36:10 +11001130 msbp->msb_delta = tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 msbp++;
1132 }
1133 }
1134
1135 /*
1136 * If we need to change anything, do it.
1137 */
1138 if (msbp > msb) {
1139 error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
1140 (uint)(msbp - msb), rsvd);
Christoph Hellwig1b040712010-09-30 02:25:56 +00001141 if (error)
1142 goto out_undo_ifreecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 }
Christoph Hellwig1b040712010-09-30 02:25:56 +00001144
1145 return;
1146
1147out_undo_ifreecount:
1148 if (ifreedelta)
1149 xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd);
1150out_undo_icount:
1151 if (idelta)
1152 xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd);
1153out_undo_fdblocks:
1154 if (blkdelta)
1155 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd);
1156out:
Jesper Juhl1884bd82010-12-25 20:14:53 +00001157 ASSERT(error == 0);
Christoph Hellwig1b040712010-09-30 02:25:56 +00001158 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159}
1160
Dave Chinner09243782010-03-08 11:28:28 +11001161/*
Christoph Hellwige98c4142010-06-23 18:11:15 +10001162 * Add the given log item to the transaction's list of log items.
1163 *
1164 * The log item will now point to its new descriptor with its li_desc field.
1165 */
1166void
1167xfs_trans_add_item(
1168 struct xfs_trans *tp,
1169 struct xfs_log_item *lip)
1170{
1171 struct xfs_log_item_desc *lidp;
1172
Jesper Juhlf65020a2012-02-13 20:51:05 +00001173 ASSERT(lip->li_mountp == tp->t_mountp);
1174 ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001175
Dave Chinner43869702010-07-20 17:53:44 +10001176 lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
Christoph Hellwige98c4142010-06-23 18:11:15 +10001177
1178 lidp->lid_item = lip;
1179 lidp->lid_flags = 0;
Christoph Hellwige98c4142010-06-23 18:11:15 +10001180 list_add_tail(&lidp->lid_trans, &tp->t_items);
1181
1182 lip->li_desc = lidp;
1183}
1184
1185STATIC void
1186xfs_trans_free_item_desc(
1187 struct xfs_log_item_desc *lidp)
1188{
1189 list_del_init(&lidp->lid_trans);
1190 kmem_zone_free(xfs_log_item_desc_zone, lidp);
1191}
1192
1193/*
1194 * Unlink and free the given descriptor.
1195 */
1196void
1197xfs_trans_del_item(
1198 struct xfs_log_item *lip)
1199{
1200 xfs_trans_free_item_desc(lip->li_desc);
1201 lip->li_desc = NULL;
1202}
1203
1204/*
1205 * Unlock all of the items of a transaction and free all the descriptors
1206 * of that transaction.
1207 */
Dave Chinnerd17c7012010-08-24 11:42:52 +10001208void
Christoph Hellwige98c4142010-06-23 18:11:15 +10001209xfs_trans_free_items(
1210 struct xfs_trans *tp,
1211 xfs_lsn_t commit_lsn,
1212 int flags)
1213{
1214 struct xfs_log_item_desc *lidp, *next;
1215
1216 list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
1217 struct xfs_log_item *lip = lidp->lid_item;
1218
1219 lip->li_desc = NULL;
1220
1221 if (commit_lsn != NULLCOMMITLSN)
1222 IOP_COMMITTING(lip, commit_lsn);
1223 if (flags & XFS_TRANS_ABORT)
1224 lip->li_flags |= XFS_LI_ABORTED;
1225 IOP_UNLOCK(lip);
1226
1227 xfs_trans_free_item_desc(lidp);
1228 }
1229}
1230
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001231static inline void
1232xfs_log_item_batch_insert(
1233 struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001234 struct xfs_ail_cursor *cur,
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001235 struct xfs_log_item **log_items,
1236 int nr_items,
1237 xfs_lsn_t commit_lsn)
1238{
1239 int i;
1240
1241 spin_lock(&ailp->xa_lock);
1242 /* xfs_trans_ail_update_bulk drops ailp->xa_lock */
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001243 xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001244
1245 for (i = 0; i < nr_items; i++)
1246 IOP_UNPIN(log_items[i], 0);
1247}
1248
1249/*
1250 * Bulk operation version of xfs_trans_committed that takes a log vector of
1251 * items to insert into the AIL. This uses bulk AIL insertion techniques to
1252 * minimise lock traffic.
Dave Chinnere34a3142011-01-27 12:13:35 +11001253 *
1254 * If we are called with the aborted flag set, it is because a log write during
1255 * a CIL checkpoint commit has failed. In this case, all the items in the
1256 * checkpoint have already gone through IOP_COMMITED and IOP_UNLOCK, which
1257 * means that checkpoint commit abort handling is treated exactly the same
1258 * as an iclog write error even though we haven't started any IO yet. Hence in
1259 * this case all we need to do is IOP_COMMITTED processing, followed by an
1260 * IOP_UNPIN(aborted) call.
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001261 *
1262 * The AIL cursor is used to optimise the insert process. If commit_lsn is not
1263 * at the end of the AIL, the insert cursor avoids the need to walk
1264 * the AIL to find the insertion point on every xfs_log_item_batch_insert()
1265 * call. This saves a lot of needless list walking and is a net win, even
1266 * though it slightly increases that amount of AIL lock traffic to set it up
1267 * and tear it down.
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001268 */
1269void
1270xfs_trans_committed_bulk(
1271 struct xfs_ail *ailp,
1272 struct xfs_log_vec *log_vector,
1273 xfs_lsn_t commit_lsn,
1274 int aborted)
1275{
1276#define LOG_ITEM_BATCH_SIZE 32
1277 struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
1278 struct xfs_log_vec *lv;
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001279 struct xfs_ail_cursor cur;
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001280 int i = 0;
1281
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001282 spin_lock(&ailp->xa_lock);
1283 xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
1284 spin_unlock(&ailp->xa_lock);
1285
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001286 /* unpin all the log items */
1287 for (lv = log_vector; lv; lv = lv->lv_next ) {
1288 struct xfs_log_item *lip = lv->lv_item;
1289 xfs_lsn_t item_lsn;
1290
1291 if (aborted)
1292 lip->li_flags |= XFS_LI_ABORTED;
1293 item_lsn = IOP_COMMITTED(lip, commit_lsn);
1294
Dave Chinner1316d4d2011-07-04 05:27:36 +00001295 /* item_lsn of -1 means the item needs no further processing */
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001296 if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
1297 continue;
1298
Dave Chinnere34a3142011-01-27 12:13:35 +11001299 /*
1300 * if we are aborting the operation, no point in inserting the
1301 * object into the AIL as we are in a shutdown situation.
1302 */
1303 if (aborted) {
1304 ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount));
1305 IOP_UNPIN(lip, 1);
1306 continue;
1307 }
1308
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001309 if (item_lsn != commit_lsn) {
1310
1311 /*
1312 * Not a bulk update option due to unusual item_lsn.
1313 * Push into AIL immediately, rechecking the lsn once
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001314 * we have the ail lock. Then unpin the item. This does
1315 * not affect the AIL cursor the bulk insert path is
1316 * using.
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001317 */
1318 spin_lock(&ailp->xa_lock);
1319 if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
1320 xfs_trans_ail_update(ailp, lip, item_lsn);
1321 else
1322 spin_unlock(&ailp->xa_lock);
1323 IOP_UNPIN(lip, 0);
1324 continue;
1325 }
1326
1327 /* Item is a candidate for bulk AIL insert. */
1328 log_items[i++] = lv->lv_item;
1329 if (i >= LOG_ITEM_BATCH_SIZE) {
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001330 xfs_log_item_batch_insert(ailp, &cur, log_items,
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001331 LOG_ITEM_BATCH_SIZE, commit_lsn);
1332 i = 0;
1333 }
1334 }
1335
1336 /* make sure we insert the remainder! */
1337 if (i)
Dave Chinner1d8c95a2011-07-18 03:40:16 +00001338 xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
1339
1340 spin_lock(&ailp->xa_lock);
1341 xfs_trans_ail_cursor_done(ailp, &cur);
1342 spin_unlock(&ailp->xa_lock);
Dave Chinner0e57f6a2010-12-20 12:02:19 +11001343}
1344
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +11001345/*
Christoph Hellwigb1037052011-09-19 14:55:51 +00001346 * Commit the given transaction to the log.
Dave Chinner09243782010-03-08 11:28:28 +11001347 *
1348 * XFS disk error handling mechanism is not based on a typical
1349 * transaction abort mechanism. Logically after the filesystem
1350 * gets marked 'SHUTDOWN', we can't let any new transactions
1351 * be durable - ie. committed to disk - because some metadata might
1352 * be inconsistent. In such cases, this returns an error, and the
1353 * caller may assume that all locked objects joined to the transaction
1354 * have already been unlocked as if the commit had succeeded.
1355 * Do not reference the transaction structure after this call.
1356 */
Dave Chinner09243782010-03-08 11:28:28 +11001357int
Christoph Hellwigb1037052011-09-19 14:55:51 +00001358xfs_trans_commit(
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001359 struct xfs_trans *tp,
Christoph Hellwigb1037052011-09-19 14:55:51 +00001360 uint flags)
Dave Chinner09243782010-03-08 11:28:28 +11001361{
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001362 struct xfs_mount *mp = tp->t_mountp;
Dave Chinner09243782010-03-08 11:28:28 +11001363 xfs_lsn_t commit_lsn = -1;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001364 int error = 0;
Dave Chinner09243782010-03-08 11:28:28 +11001365 int log_flags = 0;
1366 int sync = tp->t_flags & XFS_TRANS_SYNC;
Dave Chinner09243782010-03-08 11:28:28 +11001367
1368 /*
1369 * Determine whether this commit is releasing a permanent
1370 * log reservation or not.
1371 */
1372 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
1373 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
1374 log_flags = XFS_LOG_REL_PERM_RESERV;
1375 }
1376
1377 /*
1378 * If there is nothing to be logged by the transaction,
1379 * then unlock all of the items associated with the
1380 * transaction and free the transaction structure.
1381 * Also make sure to return any reserved blocks to
1382 * the free pool.
1383 */
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001384 if (!(tp->t_flags & XFS_TRANS_DIRTY))
1385 goto out_unreserve;
1386
1387 if (XFS_FORCED_SHUTDOWN(mp)) {
1388 error = XFS_ERROR(EIO);
1389 goto out_unreserve;
Dave Chinner09243782010-03-08 11:28:28 +11001390 }
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001391
Dave Chinner09243782010-03-08 11:28:28 +11001392 ASSERT(tp->t_ticket != NULL);
1393
1394 /*
1395 * If we need to update the superblock, then do it now.
1396 */
1397 if (tp->t_flags & XFS_TRANS_SB_DIRTY)
1398 xfs_trans_apply_sb_deltas(tp);
1399 xfs_trans_apply_dquot_deltas(tp);
1400
Christoph Hellwig0244b962011-12-06 21:58:08 +00001401 error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
Dave Chinner09243782010-03-08 11:28:28 +11001402 if (error == ENOMEM) {
1403 xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001404 error = XFS_ERROR(EIO);
1405 goto out_unreserve;
Dave Chinner09243782010-03-08 11:28:28 +11001406 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
Christoph Hellwig0244b962011-12-06 21:58:08 +00001408 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
1409 xfs_trans_free(tp);
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 /*
1412 * If the transaction needs to be synchronous, then force the
1413 * log out now and wait for it.
1414 */
1415 if (sync) {
Christoph Hellwigf538d4d2005-11-02 10:26:59 +11001416 if (!error) {
Christoph Hellwiga14a3482010-01-19 09:56:46 +00001417 error = _xfs_log_force_lsn(mp, commit_lsn,
Christoph Hellwigb1037052011-09-19 14:55:51 +00001418 XFS_LOG_SYNC, NULL);
Christoph Hellwigf538d4d2005-11-02 10:26:59 +11001419 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 XFS_STATS_INC(xs_trans_sync);
1421 } else {
1422 XFS_STATS_INC(xs_trans_async);
1423 }
1424
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001425 return error;
1426
1427out_unreserve:
1428 xfs_trans_unreserve_and_mod_sb(tp);
1429
1430 /*
1431 * It is indeed possible for the transaction to be not dirty but
1432 * the dqinfo portion to be. All that means is that we have some
1433 * (non-persistent) quota reservations that need to be unreserved.
1434 */
1435 xfs_trans_unreserve_and_mod_dquots(tp);
1436 if (tp->t_ticket) {
1437 commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
1438 if (commit_lsn == -1 && !error)
1439 error = XFS_ERROR(EIO);
1440 }
1441 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Dave Chinner71e330b2010-05-21 14:37:18 +10001442 xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +11001443 xfs_trans_free(tp);
1444
1445 XFS_STATS_INC(xs_trans_empty);
1446 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447}
1448
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 * Unlock all of the transaction's items and free the transaction.
1451 * The transaction must not have modified any of its items, because
1452 * there is no way to restore them to their previous state.
1453 *
1454 * If the transaction has made a log reservation, make sure to release
1455 * it as well.
1456 */
1457void
1458xfs_trans_cancel(
1459 xfs_trans_t *tp,
1460 int flags)
1461{
1462 int log_flags;
Ryan Hankins0733af22006-01-11 15:36:44 +11001463 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
1465 /*
1466 * See if the caller is being too lazy to figure out if
1467 * the transaction really needs an abort.
1468 */
1469 if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY))
1470 flags &= ~XFS_TRANS_ABORT;
1471 /*
1472 * See if the caller is relying on us to shut down the
1473 * filesystem. This happens in paths where we detect
1474 * corruption and decide to give up.
1475 */
Nathan Scott60a204f2006-01-11 15:37:00 +11001476 if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) {
Ryan Hankins0733af22006-01-11 15:36:44 +11001477 XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
Nathan Scott7d04a332006-06-09 14:58:38 +10001478 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Nathan Scott60a204f2006-01-11 15:37:00 +11001479 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480#ifdef DEBUG
Christoph Hellwige98c4142010-06-23 18:11:15 +10001481 if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) {
1482 struct xfs_log_item_desc *lidp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
Christoph Hellwige98c4142010-06-23 18:11:15 +10001484 list_for_each_entry(lidp, &tp->t_items, lid_trans)
1485 ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 }
1487#endif
1488 xfs_trans_unreserve_and_mod_sb(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +02001489 xfs_trans_unreserve_and_mod_dquots(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490
1491 if (tp->t_ticket) {
1492 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
1493 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
1494 log_flags = XFS_LOG_REL_PERM_RESERV;
1495 } else {
1496 log_flags = 0;
1497 }
Ryan Hankins0733af22006-01-11 15:36:44 +11001498 xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 }
1500
1501 /* mark this thread as no longer being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +10001502 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Dave Chinner71e330b2010-05-21 14:37:18 +10001504 xfs_trans_free_items(tp, NULLCOMMITLSN, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 xfs_trans_free(tp);
1506}
1507
Niv Sardi322ff6b2008-08-13 16:05:49 +10001508/*
1509 * Roll from one trans in the sequence of PERMANENT transactions to
1510 * the next: permanent transactions are only flushed out when
1511 * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
1512 * as possible to let chunks of it go to the log. So we commit the
1513 * chunk we've been working on and get a new transaction to continue.
1514 */
1515int
1516xfs_trans_roll(
1517 struct xfs_trans **tpp,
1518 struct xfs_inode *dp)
1519{
1520 struct xfs_trans *trans;
1521 unsigned int logres, count;
1522 int error;
1523
1524 /*
1525 * Ensure that the inode is always logged.
1526 */
1527 trans = *tpp;
1528 xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
1529
1530 /*
1531 * Copy the critical parameters from one trans to the next.
1532 */
1533 logres = trans->t_log_res;
1534 count = trans->t_log_count;
1535 *tpp = xfs_trans_dup(trans);
1536
1537 /*
1538 * Commit the current transaction.
1539 * If this commit failed, then it'd just unlock those items that
1540 * are not marked ihold. That also means that a filesystem shutdown
1541 * is in progress. The caller takes the responsibility to cancel
1542 * the duplicate transaction that gets returned.
1543 */
1544 error = xfs_trans_commit(trans, 0);
1545 if (error)
1546 return (error);
1547
1548 trans = *tpp;
1549
1550 /*
Dave Chinnercc09c0d2008-11-17 17:37:10 +11001551 * transaction commit worked ok so we can drop the extra ticket
1552 * reference that we gained in xfs_trans_dup()
1553 */
1554 xfs_log_ticket_put(trans->t_ticket);
1555
1556
1557 /*
Niv Sardi322ff6b2008-08-13 16:05:49 +10001558 * Reserve space in the log for th next transaction.
1559 * This also pushes items in the "AIL", the list of logged items,
1560 * out to disk if they are taking up space at the tail of the log
1561 * that we want to use. This requires that either nothing be locked
1562 * across this call, or that anything that is locked be logged in
1563 * the prior and the next transactions.
1564 */
1565 error = xfs_trans_reserve(trans, 0, logres, 0,
1566 XFS_TRANS_PERM_LOG_RES, count);
1567 /*
1568 * Ensure that the inode is in the new transaction and locked.
1569 */
1570 if (error)
1571 return error;
1572
Christoph Hellwigddc34152011-09-19 15:00:54 +00001573 xfs_trans_ijoin(trans, dp, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001574 return 0;
1575}