Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
e98c414f | 3 | * Copyright (C) 2010 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
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 | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
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. | |
1da177e4 | 14 | * |
7b718769 NS |
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 | |
1da177e4 | 18 | */ |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
1da177e4 | 21 | #include "xfs_types.h" |
a844f451 | 22 | #include "xfs_bit.h" |
1da177e4 | 23 | #include "xfs_log.h" |
a844f451 | 24 | #include "xfs_inum.h" |
1da177e4 LT |
25 | #include "xfs_trans.h" |
26 | #include "xfs_sb.h" | |
27 | #include "xfs_ag.h" | |
1da177e4 LT |
28 | #include "xfs_mount.h" |
29 | #include "xfs_error.h" | |
a844f451 | 30 | #include "xfs_da_btree.h" |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
34 | #include "xfs_dinode.h" |
35 | #include "xfs_inode.h" | |
a844f451 NS |
36 | #include "xfs_btree.h" |
37 | #include "xfs_ialloc.h" | |
38 | #include "xfs_alloc.h" | |
1da177e4 | 39 | #include "xfs_bmap.h" |
1da177e4 | 40 | #include "xfs_quota.h" |
a844f451 | 41 | #include "xfs_trans_priv.h" |
1da177e4 | 42 | #include "xfs_trans_space.h" |
322ff6b8 | 43 | #include "xfs_inode_item.h" |
ed3b4d6c | 44 | #include "xfs_trace.h" |
1da177e4 | 45 | |
8f794055 | 46 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 47 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 48 | |
025101dc | 49 | |
8f794055 | 50 | /* |
025101dc CH |
51 | * Various log reservation values. |
52 | * | |
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. | |
56 | * | |
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. | |
64 | * | |
65 | * Reservation functions here avoid a huge stack in xfs_trans_init due to | |
66 | * register overflow from temporaries in the calculations. | |
67 | */ | |
68 | ||
69 | ||
70 | /* | |
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 | |
8f794055 | 83 | */ |
8f794055 | 84 | STATIC uint |
025101dc CH |
85 | xfs_calc_write_reservation( |
86 | struct xfs_mount *mp) | |
8f794055 | 87 | { |
025101dc CH |
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)))); | |
8f794055 NS |
101 | } |
102 | ||
025101dc CH |
103 | /* |
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 | |
115 | */ | |
8f794055 | 116 | STATIC uint |
025101dc CH |
117 | xfs_calc_itruncate_reservation( |
118 | struct xfs_mount *mp) | |
8f794055 | 119 | { |
025101dc CH |
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)) + | |
129 | 128 * 5 + | |
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)))); | |
8f794055 NS |
133 | } |
134 | ||
025101dc CH |
135 | /* |
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 | |
146 | */ | |
8f794055 | 147 | STATIC uint |
025101dc CH |
148 | xfs_calc_rename_reservation( |
149 | struct xfs_mount *mp) | |
8f794055 | 150 | { |
025101dc CH |
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)))); | |
8f794055 NS |
160 | } |
161 | ||
025101dc CH |
162 | /* |
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 | |
173 | */ | |
8f794055 | 174 | STATIC uint |
025101dc CH |
175 | xfs_calc_link_reservation( |
176 | struct xfs_mount *mp) | |
8f794055 | 177 | { |
025101dc CH |
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)))); | |
8f794055 NS |
188 | } |
189 | ||
025101dc CH |
190 | /* |
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 | |
201 | */ | |
8f794055 | 202 | STATIC uint |
025101dc CH |
203 | xfs_calc_remove_reservation( |
204 | struct xfs_mount *mp) | |
8f794055 | 205 | { |
025101dc CH |
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)))); | |
8f794055 NS |
216 | } |
217 | ||
025101dc CH |
218 | /* |
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 | |
231 | */ | |
8f794055 | 232 | STATIC uint |
025101dc CH |
233 | xfs_calc_symlink_reservation( |
234 | struct xfs_mount *mp) | |
8f794055 | 235 | { |
025101dc CH |
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) + | |
241 | 1024 + | |
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)))); | |
8f794055 NS |
249 | } |
250 | ||
025101dc CH |
251 | /* |
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 | |
265 | */ | |
8f794055 | 266 | STATIC uint |
025101dc CH |
267 | xfs_calc_create_reservation( |
268 | struct xfs_mount *mp) | |
8f794055 | 269 | { |
025101dc CH |
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)))); | |
8f794055 NS |
283 | } |
284 | ||
025101dc CH |
285 | /* |
286 | * Making a new directory is the same as creating a new file. | |
287 | */ | |
8f794055 | 288 | STATIC uint |
025101dc CH |
289 | xfs_calc_mkdir_reservation( |
290 | struct xfs_mount *mp) | |
8f794055 | 291 | { |
025101dc | 292 | return xfs_calc_create_reservation(mp); |
8f794055 NS |
293 | } |
294 | ||
025101dc CH |
295 | /* |
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 | |
304 | */ | |
8f794055 | 305 | STATIC uint |
025101dc CH |
306 | xfs_calc_ifree_reservation( |
307 | struct xfs_mount *mp) | |
8f794055 | 308 | { |
025101dc CH |
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)) + | |
316 | 128 * 5 + | |
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)); | |
8f794055 NS |
320 | } |
321 | ||
025101dc CH |
322 | /* |
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. | |
325 | */ | |
8f794055 | 326 | STATIC uint |
025101dc CH |
327 | xfs_calc_ichange_reservation( |
328 | struct xfs_mount *mp) | |
8f794055 | 329 | { |
025101dc CH |
330 | return XFS_DQUOT_LOGRES(mp) + |
331 | mp->m_sb.sb_inodesize + | |
332 | mp->m_sb.sb_sectsize + | |
333 | 512; | |
334 | ||
8f794055 NS |
335 | } |
336 | ||
025101dc CH |
337 | /* |
338 | * Growing the data section of the filesystem. | |
339 | * superblock | |
340 | * agi and agf | |
341 | * allocation btrees | |
342 | */ | |
8f794055 | 343 | STATIC uint |
025101dc CH |
344 | xfs_calc_growdata_reservation( |
345 | struct xfs_mount *mp) | |
8f794055 | 346 | { |
025101dc CH |
347 | return mp->m_sb.sb_sectsize * 3 + |
348 | XFS_ALLOCFREE_LOG_RES(mp, 1) + | |
349 | 128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1)); | |
8f794055 NS |
350 | } |
351 | ||
025101dc CH |
352 | /* |
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 | |
361 | */ | |
8f794055 | 362 | STATIC uint |
025101dc CH |
363 | xfs_calc_growrtalloc_reservation( |
364 | struct xfs_mount *mp) | |
8f794055 | 365 | { |
025101dc CH |
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)); | |
8f794055 NS |
372 | } |
373 | ||
025101dc CH |
374 | /* |
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 | |
378 | */ | |
8f794055 | 379 | STATIC uint |
025101dc CH |
380 | xfs_calc_growrtzero_reservation( |
381 | struct xfs_mount *mp) | |
8f794055 | 382 | { |
025101dc | 383 | return mp->m_sb.sb_blocksize + 128; |
8f794055 NS |
384 | } |
385 | ||
025101dc CH |
386 | /* |
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 | |
395 | */ | |
8f794055 | 396 | STATIC uint |
025101dc CH |
397 | xfs_calc_growrtfree_reservation( |
398 | struct xfs_mount *mp) | |
8f794055 | 399 | { |
025101dc CH |
400 | return mp->m_sb.sb_sectsize + |
401 | 2 * mp->m_sb.sb_inodesize + | |
402 | mp->m_sb.sb_blocksize + | |
403 | mp->m_rsumsize + | |
404 | 128 * 5; | |
8f794055 NS |
405 | } |
406 | ||
025101dc CH |
407 | /* |
408 | * Logging the inode modification timestamp on a synchronous write. | |
409 | * inode | |
410 | */ | |
8f794055 | 411 | STATIC uint |
025101dc CH |
412 | xfs_calc_swrite_reservation( |
413 | struct xfs_mount *mp) | |
8f794055 | 414 | { |
025101dc | 415 | return mp->m_sb.sb_inodesize + 128; |
8f794055 NS |
416 | } |
417 | ||
025101dc CH |
418 | /* |
419 | * Logging the inode mode bits when writing a setuid/setgid file | |
420 | * inode | |
421 | */ | |
8f794055 NS |
422 | STATIC uint |
423 | xfs_calc_writeid_reservation(xfs_mount_t *mp) | |
424 | { | |
025101dc | 425 | return mp->m_sb.sb_inodesize + 128; |
8f794055 NS |
426 | } |
427 | ||
025101dc CH |
428 | /* |
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 | |
434 | * allocation btrees | |
435 | */ | |
8f794055 | 436 | STATIC uint |
025101dc CH |
437 | xfs_calc_addafork_reservation( |
438 | struct xfs_mount *mp) | |
8f794055 | 439 | { |
025101dc CH |
440 | return XFS_DQUOT_LOGRES(mp) + |
441 | mp->m_sb.sb_inodesize + | |
442 | mp->m_sb.sb_sectsize * 2 + | |
443 | mp->m_dirblksize + | |
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)); | |
8f794055 NS |
448 | } |
449 | ||
025101dc CH |
450 | /* |
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 | |
460 | */ | |
8f794055 | 461 | STATIC uint |
025101dc CH |
462 | xfs_calc_attrinval_reservation( |
463 | struct xfs_mount *mp) | |
8f794055 | 464 | { |
025101dc CH |
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)))); | |
8f794055 NS |
473 | } |
474 | ||
025101dc CH |
475 | /* |
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. | |
484 | */ | |
8f794055 | 485 | STATIC uint |
025101dc CH |
486 | xfs_calc_attrset_reservation( |
487 | struct xfs_mount *mp) | |
8f794055 | 488 | { |
025101dc CH |
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); | |
8f794055 NS |
494 | } |
495 | ||
025101dc CH |
496 | /* |
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 | |
506 | */ | |
8f794055 | 507 | STATIC uint |
025101dc CH |
508 | xfs_calc_attrrm_reservation( |
509 | struct xfs_mount *mp) | |
8f794055 | 510 | { |
025101dc CH |
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)))); | |
8f794055 NS |
522 | } |
523 | ||
025101dc CH |
524 | /* |
525 | * Clearing a bad agino number in an agi hash bucket. | |
526 | */ | |
8f794055 | 527 | STATIC uint |
025101dc CH |
528 | xfs_calc_clear_agi_bucket_reservation( |
529 | struct xfs_mount *mp) | |
8f794055 | 530 | { |
025101dc | 531 | return mp->m_sb.sb_sectsize + 128; |
8f794055 NS |
532 | } |
533 | ||
1da177e4 LT |
534 | /* |
535 | * Initialize the precomputed transaction reservation values | |
536 | * in the mount structure. | |
537 | */ | |
538 | void | |
539 | xfs_trans_init( | |
025101dc | 540 | struct xfs_mount *mp) |
1da177e4 | 541 | { |
025101dc | 542 | struct xfs_trans_reservations *resp = &mp->m_reservations; |
1da177e4 | 543 | |
8f794055 NS |
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); | |
1da177e4 LT |
565 | } |
566 | ||
567 | /* | |
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. | |
571 | * | |
572 | * Dynamically allocate the transaction structure from the transaction | |
573 | * zone, initialize it, and return it to the caller. | |
574 | */ | |
575 | xfs_trans_t * | |
576 | xfs_trans_alloc( | |
577 | xfs_mount_t *mp, | |
578 | uint type) | |
579 | { | |
b267ce99 | 580 | xfs_wait_for_freeze(mp, SB_FREEZE_TRANS); |
80641dc6 | 581 | return _xfs_trans_alloc(mp, type, KM_SLEEP); |
1da177e4 LT |
582 | } |
583 | ||
584 | xfs_trans_t * | |
585 | _xfs_trans_alloc( | |
586 | xfs_mount_t *mp, | |
80641dc6 CH |
587 | uint type, |
588 | uint memflags) | |
1da177e4 LT |
589 | { |
590 | xfs_trans_t *tp; | |
591 | ||
34327e13 | 592 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 593 | |
80641dc6 | 594 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
1da177e4 LT |
595 | tp->t_magic = XFS_TRANS_MAGIC; |
596 | tp->t_type = type; | |
597 | tp->t_mountp = mp; | |
e98c414f | 598 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 599 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 600 | return tp; |
1da177e4 LT |
601 | } |
602 | ||
b1c1b5b6 DC |
603 | /* |
604 | * Free the transaction structure. If there is more clean up | |
605 | * to do when the structure is freed, add it here. | |
606 | */ | |
607 | STATIC void | |
608 | xfs_trans_free( | |
ed3b4d6c | 609 | struct xfs_trans *tp) |
b1c1b5b6 | 610 | { |
ed3b4d6c DC |
611 | struct xfs_busy_extent *busyp, *n; |
612 | ||
613 | list_for_each_entry_safe(busyp, n, &tp->t_busy, list) | |
614 | xfs_alloc_busy_clear(tp->t_mountp, busyp); | |
615 | ||
b1c1b5b6 DC |
616 | atomic_dec(&tp->t_mountp->m_active_trans); |
617 | xfs_trans_free_dqinfo(tp); | |
618 | kmem_zone_free(xfs_trans_zone, tp); | |
619 | } | |
620 | ||
1da177e4 LT |
621 | /* |
622 | * This is called to create a new transaction which will share the | |
623 | * permanent log reservation of the given transaction. The remaining | |
624 | * unused block and rt extent reservations are also inherited. This | |
625 | * implies that the original transaction is no longer allowed to allocate | |
626 | * blocks. Locks and log items, however, are no inherited. They must | |
627 | * be added to the new transaction explicitly. | |
628 | */ | |
629 | xfs_trans_t * | |
630 | xfs_trans_dup( | |
631 | xfs_trans_t *tp) | |
632 | { | |
633 | xfs_trans_t *ntp; | |
634 | ||
635 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
636 | ||
637 | /* | |
638 | * Initialize the new transaction structure. | |
639 | */ | |
640 | ntp->t_magic = XFS_TRANS_MAGIC; | |
641 | ntp->t_type = tp->t_type; | |
642 | ntp->t_mountp = tp->t_mountp; | |
e98c414f | 643 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 644 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
645 | |
646 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 647 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 648 | |
1da177e4 | 649 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE); |
cc09c0dc | 650 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
651 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
652 | tp->t_blk_res = tp->t_blk_res_used; | |
653 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
654 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 655 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 656 | |
7d095257 | 657 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
658 | |
659 | atomic_inc(&tp->t_mountp->m_active_trans); | |
660 | return ntp; | |
661 | } | |
662 | ||
663 | /* | |
664 | * This is called to reserve free disk blocks and log space for the | |
665 | * given transaction. This must be done before allocating any resources | |
666 | * within the transaction. | |
667 | * | |
668 | * This will return ENOSPC if there are not enough blocks available. | |
669 | * It will sleep waiting for available log space. | |
670 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
671 | * is used by long running transactions. If any one of the reservations | |
672 | * fails then they will all be backed out. | |
673 | * | |
674 | * This does not do quota reservations. That typically is done by the | |
675 | * caller afterwards. | |
676 | */ | |
677 | int | |
678 | xfs_trans_reserve( | |
679 | xfs_trans_t *tp, | |
680 | uint blocks, | |
681 | uint logspace, | |
682 | uint rtextents, | |
683 | uint flags, | |
684 | uint logcount) | |
685 | { | |
686 | int log_flags; | |
59c1b082 NS |
687 | int error = 0; |
688 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
689 | |
690 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 691 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
692 | |
693 | /* | |
694 | * Attempt to reserve the needed disk blocks by decrementing | |
695 | * the number needed from the number available. This will | |
696 | * fail if the count would go below zero. | |
697 | */ | |
698 | if (blocks > 0) { | |
96540c78 | 699 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 700 | -((int64_t)blocks), rsvd); |
1da177e4 | 701 | if (error != 0) { |
59c1b082 | 702 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
703 | return (XFS_ERROR(ENOSPC)); |
704 | } | |
705 | tp->t_blk_res += blocks; | |
706 | } | |
707 | ||
708 | /* | |
709 | * Reserve the log space needed for this transaction. | |
710 | */ | |
711 | if (logspace > 0) { | |
712 | ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace)); | |
713 | ASSERT((tp->t_log_count == 0) || | |
714 | (tp->t_log_count == logcount)); | |
715 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
716 | log_flags = XFS_LOG_PERM_RESERV; | |
717 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; | |
718 | } else { | |
719 | ASSERT(tp->t_ticket == NULL); | |
720 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
721 | log_flags = 0; | |
722 | } | |
723 | ||
724 | error = xfs_log_reserve(tp->t_mountp, logspace, logcount, | |
725 | &tp->t_ticket, | |
7e9c6396 | 726 | XFS_TRANSACTION, log_flags, tp->t_type); |
1da177e4 LT |
727 | if (error) { |
728 | goto undo_blocks; | |
729 | } | |
730 | tp->t_log_res = logspace; | |
731 | tp->t_log_count = logcount; | |
732 | } | |
733 | ||
734 | /* | |
735 | * Attempt to reserve the needed realtime extents by decrementing | |
736 | * the number needed from the number available. This will | |
737 | * fail if the count would go below zero. | |
738 | */ | |
739 | if (rtextents > 0) { | |
740 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 741 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
742 | if (error) { |
743 | error = XFS_ERROR(ENOSPC); | |
744 | goto undo_log; | |
745 | } | |
746 | tp->t_rtx_res += rtextents; | |
747 | } | |
748 | ||
749 | return 0; | |
750 | ||
751 | /* | |
752 | * Error cases jump to one of these labels to undo any | |
753 | * reservations which have already been performed. | |
754 | */ | |
755 | undo_log: | |
756 | if (logspace > 0) { | |
757 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
758 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
759 | } else { | |
760 | log_flags = 0; | |
761 | } | |
762 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
763 | tp->t_ticket = NULL; | |
764 | tp->t_log_res = 0; | |
765 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
766 | } | |
767 | ||
768 | undo_blocks: | |
769 | if (blocks > 0) { | |
96540c78 | 770 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 771 | (int64_t)blocks, rsvd); |
1da177e4 LT |
772 | tp->t_blk_res = 0; |
773 | } | |
774 | ||
59c1b082 | 775 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 776 | |
59c1b082 | 777 | return error; |
1da177e4 LT |
778 | } |
779 | ||
1da177e4 LT |
780 | /* |
781 | * Record the indicated change to the given field for application | |
782 | * to the file system's superblock when the transaction commits. | |
783 | * For now, just store the change in the transaction structure. | |
784 | * | |
785 | * Mark the transaction structure to indicate that the superblock | |
786 | * needs to be updated before committing. | |
92821e2b DC |
787 | * |
788 | * Because we may not be keeping track of allocated/free inodes and | |
789 | * used filesystem blocks in the superblock, we do not mark the | |
790 | * superblock dirty in this transaction if we modify these fields. | |
791 | * We still need to update the transaction deltas so that they get | |
792 | * applied to the incore superblock, but we don't want them to | |
793 | * cause the superblock to get locked and logged if these are the | |
794 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
795 | */ |
796 | void | |
797 | xfs_trans_mod_sb( | |
798 | xfs_trans_t *tp, | |
799 | uint field, | |
20f4ebf2 | 800 | int64_t delta) |
1da177e4 | 801 | { |
92821e2b DC |
802 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
803 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
804 | |
805 | switch (field) { | |
806 | case XFS_TRANS_SB_ICOUNT: | |
807 | tp->t_icount_delta += delta; | |
92821e2b DC |
808 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
809 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
810 | break; |
811 | case XFS_TRANS_SB_IFREE: | |
812 | tp->t_ifree_delta += delta; | |
92821e2b DC |
813 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
814 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
815 | break; |
816 | case XFS_TRANS_SB_FDBLOCKS: | |
817 | /* | |
818 | * Track the number of blocks allocated in the | |
819 | * transaction. Make sure it does not exceed the | |
820 | * number reserved. | |
821 | */ | |
822 | if (delta < 0) { | |
823 | tp->t_blk_res_used += (uint)-delta; | |
824 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
825 | } | |
826 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
827 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
828 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
829 | break; |
830 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
831 | /* | |
832 | * The allocation has already been applied to the | |
833 | * in-core superblock's counter. This should only | |
834 | * be applied to the on-disk superblock. | |
835 | */ | |
836 | ASSERT(delta < 0); | |
837 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
838 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
839 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
840 | break; |
841 | case XFS_TRANS_SB_FREXTENTS: | |
842 | /* | |
843 | * Track the number of blocks allocated in the | |
844 | * transaction. Make sure it does not exceed the | |
845 | * number reserved. | |
846 | */ | |
847 | if (delta < 0) { | |
848 | tp->t_rtx_res_used += (uint)-delta; | |
849 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
850 | } | |
851 | tp->t_frextents_delta += delta; | |
852 | break; | |
853 | case XFS_TRANS_SB_RES_FREXTENTS: | |
854 | /* | |
855 | * The allocation has already been applied to the | |
c41564b5 | 856 | * in-core superblock's counter. This should only |
1da177e4 LT |
857 | * be applied to the on-disk superblock. |
858 | */ | |
859 | ASSERT(delta < 0); | |
860 | tp->t_res_frextents_delta += delta; | |
861 | break; | |
862 | case XFS_TRANS_SB_DBLOCKS: | |
863 | ASSERT(delta > 0); | |
864 | tp->t_dblocks_delta += delta; | |
865 | break; | |
866 | case XFS_TRANS_SB_AGCOUNT: | |
867 | ASSERT(delta > 0); | |
868 | tp->t_agcount_delta += delta; | |
869 | break; | |
870 | case XFS_TRANS_SB_IMAXPCT: | |
871 | tp->t_imaxpct_delta += delta; | |
872 | break; | |
873 | case XFS_TRANS_SB_REXTSIZE: | |
874 | tp->t_rextsize_delta += delta; | |
875 | break; | |
876 | case XFS_TRANS_SB_RBMBLOCKS: | |
877 | tp->t_rbmblocks_delta += delta; | |
878 | break; | |
879 | case XFS_TRANS_SB_RBLOCKS: | |
880 | tp->t_rblocks_delta += delta; | |
881 | break; | |
882 | case XFS_TRANS_SB_REXTENTS: | |
883 | tp->t_rextents_delta += delta; | |
884 | break; | |
885 | case XFS_TRANS_SB_REXTSLOG: | |
886 | tp->t_rextslog_delta += delta; | |
887 | break; | |
888 | default: | |
889 | ASSERT(0); | |
890 | return; | |
891 | } | |
892 | ||
210c6f1c | 893 | tp->t_flags |= flags; |
1da177e4 LT |
894 | } |
895 | ||
896 | /* | |
897 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
898 | * to bring the superblock buffer into the current transaction | |
899 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
900 | * | |
901 | * For now we just look at each field allowed to change and change | |
902 | * it if necessary. | |
903 | */ | |
904 | STATIC void | |
905 | xfs_trans_apply_sb_deltas( | |
906 | xfs_trans_t *tp) | |
907 | { | |
2bdf7cd0 | 908 | xfs_dsb_t *sbp; |
1da177e4 LT |
909 | xfs_buf_t *bp; |
910 | int whole = 0; | |
911 | ||
912 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
913 | sbp = XFS_BUF_TO_SBP(bp); | |
914 | ||
915 | /* | |
916 | * Check that superblock mods match the mods made to AGF counters. | |
917 | */ | |
918 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
919 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
920 | tp->t_ag_btree_delta)); | |
921 | ||
92821e2b DC |
922 | /* |
923 | * Only update the superblock counters if we are logging them | |
924 | */ | |
925 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 926 | if (tp->t_icount_delta) |
413d57c9 | 927 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 928 | if (tp->t_ifree_delta) |
413d57c9 | 929 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 930 | if (tp->t_fdblocks_delta) |
413d57c9 | 931 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 932 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 933 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
934 | } |
935 | ||
2bdf7cd0 | 936 | if (tp->t_frextents_delta) |
413d57c9 | 937 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 938 | if (tp->t_res_frextents_delta) |
413d57c9 | 939 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
940 | |
941 | if (tp->t_dblocks_delta) { | |
413d57c9 | 942 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
943 | whole = 1; |
944 | } | |
2bdf7cd0 | 945 | if (tp->t_agcount_delta) { |
413d57c9 | 946 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
947 | whole = 1; |
948 | } | |
2bdf7cd0 CH |
949 | if (tp->t_imaxpct_delta) { |
950 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
951 | whole = 1; |
952 | } | |
2bdf7cd0 | 953 | if (tp->t_rextsize_delta) { |
413d57c9 | 954 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
955 | whole = 1; |
956 | } | |
2bdf7cd0 | 957 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 958 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
959 | whole = 1; |
960 | } | |
2bdf7cd0 | 961 | if (tp->t_rblocks_delta) { |
413d57c9 | 962 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
963 | whole = 1; |
964 | } | |
2bdf7cd0 | 965 | if (tp->t_rextents_delta) { |
413d57c9 | 966 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
967 | whole = 1; |
968 | } | |
2bdf7cd0 CH |
969 | if (tp->t_rextslog_delta) { |
970 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
971 | whole = 1; |
972 | } | |
973 | ||
974 | if (whole) | |
975 | /* | |
c41564b5 | 976 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 977 | */ |
2bdf7cd0 | 978 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
979 | else |
980 | /* | |
981 | * Since all the modifiable fields are contiguous, we | |
982 | * can get away with this. | |
983 | */ | |
2bdf7cd0 CH |
984 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
985 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 986 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
987 | } |
988 | ||
989 | /* | |
45c34141 DC |
990 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
991 | * and apply superblock counter changes to the in-core superblock. The | |
992 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
993 | * applied to the in-core superblock. The idea is that that has already been | |
994 | * done. | |
1da177e4 LT |
995 | * |
996 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
997 | * However, we have to ensure that we only modify each superblock field only |
998 | * once because the application of the delta values may not be atomic. That can | |
999 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
1000 | * free space counter to put back the entire reservation and then take away | |
1001 | * what we used. | |
1002 | * | |
1003 | * If we are not logging superblock counters, then the inode allocated/free and | |
1004 | * used block counts are not updated in the on disk superblock. In this case, | |
1005 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
1006 | * still need to update the incore superblock with the changes. | |
1da177e4 | 1007 | */ |
71e330b5 | 1008 | void |
1da177e4 LT |
1009 | xfs_trans_unreserve_and_mod_sb( |
1010 | xfs_trans_t *tp) | |
1011 | { | |
1b040712 | 1012 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 1013 | xfs_mod_sb_t *msbp; |
92821e2b | 1014 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1015 | /* REFERENCED */ |
1016 | int error; | |
1017 | int rsvd; | |
45c34141 DC |
1018 | int64_t blkdelta = 0; |
1019 | int64_t rtxdelta = 0; | |
1b040712 CH |
1020 | int64_t idelta = 0; |
1021 | int64_t ifreedelta = 0; | |
1da177e4 LT |
1022 | |
1023 | msbp = msb; | |
1024 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1025 | ||
1b040712 | 1026 | /* calculate deltas */ |
45c34141 DC |
1027 | if (tp->t_blk_res > 0) |
1028 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
1029 | if ((tp->t_fdblocks_delta != 0) && |
1030 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
1031 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
1032 | blkdelta += tp->t_fdblocks_delta; | |
1033 | ||
45c34141 DC |
1034 | if (tp->t_rtx_res > 0) |
1035 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
1036 | if ((tp->t_frextents_delta != 0) && |
1037 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
1038 | rtxdelta += tp->t_frextents_delta; | |
1039 | ||
1b040712 CH |
1040 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
1041 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
1042 | idelta = tp->t_icount_delta; | |
1043 | ifreedelta = tp->t_ifree_delta; | |
1044 | } | |
1045 | ||
1046 | /* apply the per-cpu counters */ | |
1047 | if (blkdelta) { | |
1048 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
1049 | blkdelta, rsvd); | |
1050 | if (error) | |
1051 | goto out; | |
1052 | } | |
1053 | ||
1054 | if (idelta) { | |
1055 | error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, | |
1056 | idelta, rsvd); | |
1057 | if (error) | |
1058 | goto out_undo_fdblocks; | |
1059 | } | |
1060 | ||
1061 | if (ifreedelta) { | |
1062 | error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, | |
1063 | ifreedelta, rsvd); | |
1064 | if (error) | |
1065 | goto out_undo_icount; | |
1066 | } | |
1067 | ||
1068 | /* apply remaining deltas */ | |
45c34141 | 1069 | if (rtxdelta != 0) { |
1da177e4 | 1070 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 1071 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
1072 | msbp++; |
1073 | } | |
1074 | ||
92821e2b | 1075 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
1076 | if (tp->t_dblocks_delta != 0) { |
1077 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 1078 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
1079 | msbp++; |
1080 | } | |
1081 | if (tp->t_agcount_delta != 0) { | |
1082 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 1083 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
1084 | msbp++; |
1085 | } | |
1086 | if (tp->t_imaxpct_delta != 0) { | |
1087 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 1088 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
1089 | msbp++; |
1090 | } | |
1091 | if (tp->t_rextsize_delta != 0) { | |
1092 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 1093 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
1094 | msbp++; |
1095 | } | |
1096 | if (tp->t_rbmblocks_delta != 0) { | |
1097 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 1098 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
1099 | msbp++; |
1100 | } | |
1101 | if (tp->t_rblocks_delta != 0) { | |
1102 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 1103 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
1104 | msbp++; |
1105 | } | |
1106 | if (tp->t_rextents_delta != 0) { | |
1107 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 1108 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
1109 | msbp++; |
1110 | } | |
1111 | if (tp->t_rextslog_delta != 0) { | |
1112 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 1113 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
1114 | msbp++; |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * If we need to change anything, do it. | |
1120 | */ | |
1121 | if (msbp > msb) { | |
1122 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
1123 | (uint)(msbp - msb), rsvd); | |
1b040712 CH |
1124 | if (error) |
1125 | goto out_undo_ifreecount; | |
1da177e4 | 1126 | } |
1b040712 CH |
1127 | |
1128 | return; | |
1129 | ||
1130 | out_undo_ifreecount: | |
1131 | if (ifreedelta) | |
1132 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); | |
1133 | out_undo_icount: | |
1134 | if (idelta) | |
1135 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); | |
1136 | out_undo_fdblocks: | |
1137 | if (blkdelta) | |
1138 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); | |
1139 | out: | |
1140 | ASSERT(error = 0); | |
1141 | return; | |
1da177e4 LT |
1142 | } |
1143 | ||
e98c414f CH |
1144 | /* |
1145 | * Add the given log item to the transaction's list of log items. | |
1146 | * | |
1147 | * The log item will now point to its new descriptor with its li_desc field. | |
1148 | */ | |
1149 | void | |
1150 | xfs_trans_add_item( | |
1151 | struct xfs_trans *tp, | |
1152 | struct xfs_log_item *lip) | |
1153 | { | |
1154 | struct xfs_log_item_desc *lidp; | |
1155 | ||
1156 | ASSERT(lip->li_mountp = tp->t_mountp); | |
1157 | ASSERT(lip->li_ailp = tp->t_mountp->m_ail); | |
1158 | ||
43869706 | 1159 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
1160 | |
1161 | lidp->lid_item = lip; | |
1162 | lidp->lid_flags = 0; | |
1163 | lidp->lid_size = 0; | |
1164 | list_add_tail(&lidp->lid_trans, &tp->t_items); | |
1165 | ||
1166 | lip->li_desc = lidp; | |
1167 | } | |
1168 | ||
1169 | STATIC void | |
1170 | xfs_trans_free_item_desc( | |
1171 | struct xfs_log_item_desc *lidp) | |
1172 | { | |
1173 | list_del_init(&lidp->lid_trans); | |
1174 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * Unlink and free the given descriptor. | |
1179 | */ | |
1180 | void | |
1181 | xfs_trans_del_item( | |
1182 | struct xfs_log_item *lip) | |
1183 | { | |
1184 | xfs_trans_free_item_desc(lip->li_desc); | |
1185 | lip->li_desc = NULL; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * Unlock all of the items of a transaction and free all the descriptors | |
1190 | * of that transaction. | |
1191 | */ | |
d17c701c | 1192 | void |
e98c414f CH |
1193 | xfs_trans_free_items( |
1194 | struct xfs_trans *tp, | |
1195 | xfs_lsn_t commit_lsn, | |
1196 | int flags) | |
1197 | { | |
1198 | struct xfs_log_item_desc *lidp, *next; | |
1199 | ||
1200 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
1201 | struct xfs_log_item *lip = lidp->lid_item; | |
1202 | ||
1203 | lip->li_desc = NULL; | |
1204 | ||
1205 | if (commit_lsn != NULLCOMMITLSN) | |
1206 | IOP_COMMITTING(lip, commit_lsn); | |
1207 | if (flags & XFS_TRANS_ABORT) | |
1208 | lip->li_flags |= XFS_LI_ABORTED; | |
1209 | IOP_UNLOCK(lip); | |
1210 | ||
1211 | xfs_trans_free_item_desc(lidp); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * Unlock the items associated with a transaction. | |
1217 | * | |
1218 | * Items which were not logged should be freed. Those which were logged must | |
1219 | * still be tracked so they can be unpinned when the transaction commits. | |
1220 | */ | |
1221 | STATIC void | |
1222 | xfs_trans_unlock_items( | |
1223 | struct xfs_trans *tp, | |
1224 | xfs_lsn_t commit_lsn) | |
1225 | { | |
1226 | struct xfs_log_item_desc *lidp, *next; | |
1227 | ||
1228 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
1229 | struct xfs_log_item *lip = lidp->lid_item; | |
1230 | ||
1231 | lip->li_desc = NULL; | |
1232 | ||
1233 | if (commit_lsn != NULLCOMMITLSN) | |
1234 | IOP_COMMITTING(lip, commit_lsn); | |
1235 | IOP_UNLOCK(lip); | |
1236 | ||
1237 | /* | |
1238 | * Free the descriptor if the item is not dirty | |
1239 | * within this transaction. | |
1240 | */ | |
1241 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) | |
1242 | xfs_trans_free_item_desc(lidp); | |
1243 | } | |
1244 | } | |
1245 | ||
1da177e4 | 1246 | /* |
0924378a DC |
1247 | * Total up the number of log iovecs needed to commit this |
1248 | * transaction. The transaction itself needs one for the | |
1249 | * transaction header. Ask each dirty item in turn how many | |
1250 | * it needs to get the total. | |
1da177e4 | 1251 | */ |
0924378a DC |
1252 | static uint |
1253 | xfs_trans_count_vecs( | |
b1c1b5b6 | 1254 | struct xfs_trans *tp) |
1da177e4 | 1255 | { |
0924378a | 1256 | int nvecs; |
e98c414f | 1257 | struct xfs_log_item_desc *lidp; |
1da177e4 | 1258 | |
0924378a | 1259 | nvecs = 1; |
1da177e4 | 1260 | |
0924378a DC |
1261 | /* In the non-debug case we need to start bailing out if we |
1262 | * didn't find a log_item here, return zero and let trans_commit | |
1263 | * deal with it. | |
1da177e4 | 1264 | */ |
e98c414f CH |
1265 | if (list_empty(&tp->t_items)) { |
1266 | ASSERT(0); | |
0924378a | 1267 | return 0; |
e98c414f | 1268 | } |
0924378a | 1269 | |
e98c414f | 1270 | list_for_each_entry(lidp, &tp->t_items, lid_trans) { |
0924378a DC |
1271 | /* |
1272 | * Skip items which aren't dirty in this transaction. | |
1273 | */ | |
e98c414f | 1274 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) |
0924378a | 1275 | continue; |
0924378a DC |
1276 | lidp->lid_size = IOP_SIZE(lidp->lid_item); |
1277 | nvecs += lidp->lid_size; | |
1da177e4 | 1278 | } |
0924378a DC |
1279 | |
1280 | return nvecs; | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Fill in the vector with pointers to data to be logged | |
1285 | * by this transaction. The transaction header takes | |
1286 | * the first vector, and then each dirty item takes the | |
1287 | * number of vectors it indicated it needed in xfs_trans_count_vecs(). | |
1288 | * | |
1289 | * As each item fills in the entries it needs, also pin the item | |
1290 | * so that it cannot be flushed out until the log write completes. | |
1291 | */ | |
1292 | static void | |
1293 | xfs_trans_fill_vecs( | |
1294 | struct xfs_trans *tp, | |
1295 | struct xfs_log_iovec *log_vector) | |
1296 | { | |
e98c414f | 1297 | struct xfs_log_item_desc *lidp; |
0924378a DC |
1298 | struct xfs_log_iovec *vecp; |
1299 | uint nitems; | |
1da177e4 LT |
1300 | |
1301 | /* | |
0924378a DC |
1302 | * Skip over the entry for the transaction header, we'll |
1303 | * fill that in at the end. | |
1da177e4 | 1304 | */ |
0924378a DC |
1305 | vecp = log_vector + 1; |
1306 | ||
1307 | nitems = 0; | |
e98c414f CH |
1308 | ASSERT(!list_empty(&tp->t_items)); |
1309 | list_for_each_entry(lidp, &tp->t_items, lid_trans) { | |
0924378a | 1310 | /* Skip items which aren't dirty in this transaction. */ |
e98c414f | 1311 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) |
0924378a | 1312 | continue; |
0924378a | 1313 | |
1da177e4 | 1314 | /* |
0924378a DC |
1315 | * The item may be marked dirty but not log anything. This can |
1316 | * be used to get called when a transaction is committed. | |
1da177e4 | 1317 | */ |
0924378a DC |
1318 | if (lidp->lid_size) |
1319 | nitems++; | |
1320 | IOP_FORMAT(lidp->lid_item, vecp); | |
1321 | vecp += lidp->lid_size; | |
1322 | IOP_PIN(lidp->lid_item); | |
1da177e4 | 1323 | } |
1da177e4 LT |
1324 | |
1325 | /* | |
0924378a DC |
1326 | * Now that we've counted the number of items in this transaction, fill |
1327 | * in the transaction header. Note that the transaction header does not | |
1328 | * have a log item. | |
1da177e4 | 1329 | */ |
0924378a DC |
1330 | tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC; |
1331 | tp->t_header.th_type = tp->t_type; | |
1332 | tp->t_header.th_num_items = nitems; | |
1333 | log_vector->i_addr = (xfs_caddr_t)&tp->t_header; | |
1334 | log_vector->i_len = sizeof(xfs_trans_header_t); | |
1335 | log_vector->i_type = XLOG_REG_TYPE_TRANSHDR; | |
1336 | } | |
1337 | ||
b1c1b5b6 DC |
1338 | /* |
1339 | * The committed item processing consists of calling the committed routine of | |
1340 | * each logged item, updating the item's position in the AIL if necessary, and | |
1341 | * unpinning each item. If the committed routine returns -1, then do nothing | |
1342 | * further with the item because it may have been freed. | |
1343 | * | |
1344 | * Since items are unlocked when they are copied to the incore log, it is | |
1345 | * possible for two transactions to be completing and manipulating the same | |
1346 | * item simultaneously. The AIL lock will protect the lsn field of each item. | |
1347 | * The value of this field can never go backwards. | |
1348 | * | |
1349 | * We unpin the items after repositioning them in the AIL, because otherwise | |
1350 | * they could be immediately flushed and we'd have to race with the flusher | |
1351 | * trying to pull the item from the AIL as we add it. | |
1352 | */ | |
71e330b5 | 1353 | void |
b1c1b5b6 DC |
1354 | xfs_trans_item_committed( |
1355 | struct xfs_log_item *lip, | |
1356 | xfs_lsn_t commit_lsn, | |
1357 | int aborted) | |
1358 | { | |
1359 | xfs_lsn_t item_lsn; | |
1360 | struct xfs_ail *ailp; | |
1361 | ||
1362 | if (aborted) | |
1363 | lip->li_flags |= XFS_LI_ABORTED; | |
1364 | item_lsn = IOP_COMMITTED(lip, commit_lsn); | |
1365 | ||
1366 | /* If the committed routine returns -1, item has been freed. */ | |
1367 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) | |
1368 | return; | |
1369 | ||
1370 | /* | |
1371 | * If the returned lsn is greater than what it contained before, update | |
1372 | * the location of the item in the AIL. If it is not, then do nothing. | |
1373 | * Items can never move backwards in the AIL. | |
1374 | * | |
1375 | * While the new lsn should usually be greater, it is possible that a | |
1376 | * later transaction completing simultaneously with an earlier one | |
1377 | * using the same item could complete first with a higher lsn. This | |
1378 | * would cause the earlier transaction to fail the test below. | |
1379 | */ | |
1380 | ailp = lip->li_ailp; | |
1381 | spin_lock(&ailp->xa_lock); | |
1382 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { | |
1383 | /* | |
1384 | * This will set the item's lsn to item_lsn and update the | |
1385 | * position of the item in the AIL. | |
1386 | * | |
1387 | * xfs_trans_ail_update() drops the AIL lock. | |
1388 | */ | |
1389 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
1390 | } else { | |
1391 | spin_unlock(&ailp->xa_lock); | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Now that we've repositioned the item in the AIL, unpin it so it can | |
1396 | * be flushed. Pass information about buffer stale state down from the | |
1397 | * log item flags, if anyone else stales the buffer we do not want to | |
1398 | * pay any attention to it. | |
1399 | */ | |
9412e318 | 1400 | IOP_UNPIN(lip, 0); |
b1c1b5b6 DC |
1401 | } |
1402 | ||
b1c1b5b6 DC |
1403 | /* |
1404 | * This is typically called by the LM when a transaction has been fully | |
1405 | * committed to disk. It needs to unpin the items which have | |
1406 | * been logged by the transaction and update their positions | |
1407 | * in the AIL if necessary. | |
1408 | * | |
1409 | * This also gets called when the transactions didn't get written out | |
1410 | * because of an I/O error. Abortflag & XFS_LI_ABORTED is set then. | |
1411 | */ | |
1412 | STATIC void | |
1413 | xfs_trans_committed( | |
4957a449 | 1414 | void *arg, |
b1c1b5b6 DC |
1415 | int abortflag) |
1416 | { | |
4957a449 | 1417 | struct xfs_trans *tp = arg; |
e98c414f | 1418 | struct xfs_log_item_desc *lidp, *next; |
b1c1b5b6 | 1419 | |
e98c414f | 1420 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { |
b1c1b5b6 | 1421 | xfs_trans_item_committed(lidp->lid_item, tp->t_lsn, abortflag); |
e98c414f | 1422 | xfs_trans_free_item_desc(lidp); |
b1c1b5b6 DC |
1423 | } |
1424 | ||
b1c1b5b6 DC |
1425 | xfs_trans_free(tp); |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Called from the trans_commit code when we notice that | |
1430 | * the filesystem is in the middle of a forced shutdown. | |
1431 | */ | |
1432 | STATIC void | |
1433 | xfs_trans_uncommit( | |
1434 | struct xfs_trans *tp, | |
1435 | uint flags) | |
1436 | { | |
e98c414f | 1437 | struct xfs_log_item_desc *lidp; |
b1c1b5b6 | 1438 | |
e98c414f | 1439 | list_for_each_entry(lidp, &tp->t_items, lid_trans) { |
b1c1b5b6 DC |
1440 | /* |
1441 | * Unpin all but those that aren't dirty. | |
1442 | */ | |
1443 | if (lidp->lid_flags & XFS_LID_DIRTY) | |
9412e318 | 1444 | IOP_UNPIN(lidp->lid_item, 1); |
b1c1b5b6 DC |
1445 | } |
1446 | ||
1447 | xfs_trans_unreserve_and_mod_sb(tp); | |
1448 | xfs_trans_unreserve_and_mod_dquots(tp); | |
1449 | ||
71e330b5 | 1450 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
b1c1b5b6 DC |
1451 | xfs_trans_free(tp); |
1452 | } | |
1453 | ||
0924378a DC |
1454 | /* |
1455 | * Format the transaction direct to the iclog. This isolates the physical | |
1456 | * transaction commit operation from the logical operation and hence allows | |
1457 | * other methods to be introduced without affecting the existing commit path. | |
1458 | */ | |
1459 | static int | |
1460 | xfs_trans_commit_iclog( | |
1461 | struct xfs_mount *mp, | |
1462 | struct xfs_trans *tp, | |
1463 | xfs_lsn_t *commit_lsn, | |
1464 | int flags) | |
1465 | { | |
1466 | int shutdown; | |
1467 | int error; | |
1468 | int log_flags = 0; | |
1469 | struct xlog_in_core *commit_iclog; | |
1470 | #define XFS_TRANS_LOGVEC_COUNT 16 | |
1471 | struct xfs_log_iovec log_vector_fast[XFS_TRANS_LOGVEC_COUNT]; | |
1472 | struct xfs_log_iovec *log_vector; | |
1473 | uint nvec; | |
1474 | ||
1da177e4 LT |
1475 | |
1476 | /* | |
1477 | * Ask each log item how many log_vector entries it will | |
1478 | * need so we can figure out how many to allocate. | |
1479 | * Try to avoid the kmem_alloc() call in the common case | |
1480 | * by using a vector from the stack when it fits. | |
1481 | */ | |
1482 | nvec = xfs_trans_count_vecs(tp); | |
1da177e4 | 1483 | if (nvec == 0) { |
0924378a | 1484 | return ENOMEM; /* triggers a shutdown! */ |
cfcbbbd0 | 1485 | } else if (nvec <= XFS_TRANS_LOGVEC_COUNT) { |
1da177e4 LT |
1486 | log_vector = log_vector_fast; |
1487 | } else { | |
1488 | log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec * | |
1489 | sizeof(xfs_log_iovec_t), | |
1490 | KM_SLEEP); | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * Fill in the log_vector and pin the logged items, and | |
1495 | * then write the transaction to the log. | |
1496 | */ | |
1497 | xfs_trans_fill_vecs(tp, log_vector); | |
1498 | ||
0924378a DC |
1499 | if (flags & XFS_TRANS_RELEASE_LOG_RES) |
1500 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1501 | ||
cfcbbbd0 | 1502 | error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn)); |
1da177e4 | 1503 | |
1da177e4 | 1504 | /* |
cfcbbbd0 NS |
1505 | * The transaction is committed incore here, and can go out to disk |
1506 | * at any time after this call. However, all the items associated | |
1507 | * with the transaction are still locked and pinned in memory. | |
1da177e4 | 1508 | */ |
0924378a | 1509 | *commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags); |
1da177e4 | 1510 | |
0924378a | 1511 | tp->t_commit_lsn = *commit_lsn; |
ed3b4d6c DC |
1512 | trace_xfs_trans_commit_lsn(tp); |
1513 | ||
0924378a | 1514 | if (nvec > XFS_TRANS_LOGVEC_COUNT) |
f0e2d93c | 1515 | kmem_free(log_vector); |
1da177e4 | 1516 | |
1da177e4 LT |
1517 | /* |
1518 | * If we got a log write error. Unpin the logitems that we | |
1519 | * had pinned, clean up, free trans structure, and return error. | |
1520 | */ | |
0924378a | 1521 | if (error || *commit_lsn == -1) { |
59c1b082 | 1522 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
1523 | xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT); |
1524 | return XFS_ERROR(EIO); | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * Once the transaction has committed, unused | |
1529 | * reservations need to be released and changes to | |
1530 | * the superblock need to be reflected in the in-core | |
1531 | * version. Do that now. | |
1532 | */ | |
1533 | xfs_trans_unreserve_and_mod_sb(tp); | |
1534 | ||
1da177e4 LT |
1535 | /* |
1536 | * Tell the LM to call the transaction completion routine | |
1537 | * when the log write with LSN commit_lsn completes (e.g. | |
1538 | * when the transaction commit really hits the on-disk log). | |
1539 | * After this call we cannot reference tp, because the call | |
1540 | * can happen at any time and the call will free the transaction | |
1541 | * structure pointed to by tp. The only case where we call | |
1542 | * the completion routine (xfs_trans_committed) directly is | |
1543 | * if the log is turned off on a debug kernel or we're | |
1544 | * running in simulation mode (the log is explicitly turned | |
1545 | * off). | |
1546 | */ | |
4957a449 | 1547 | tp->t_logcb.cb_func = xfs_trans_committed; |
1da177e4 LT |
1548 | tp->t_logcb.cb_arg = tp; |
1549 | ||
1550 | /* | |
1551 | * We need to pass the iclog buffer which was used for the | |
1552 | * transaction commit record into this function, and attach | |
1553 | * the callback to it. The callback must be attached before | |
1554 | * the items are unlocked to avoid racing with other threads | |
1555 | * waiting for an item to unlock. | |
1556 | */ | |
1557 | shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb)); | |
1558 | ||
1559 | /* | |
1560 | * Mark this thread as no longer being in a transaction | |
1561 | */ | |
59c1b082 | 1562 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
1563 | |
1564 | /* | |
1565 | * Once all the items of the transaction have been copied | |
1566 | * to the in core log and the callback is attached, the | |
1567 | * items can be unlocked. | |
1568 | * | |
1569 | * This will free descriptors pointing to items which were | |
1570 | * not logged since there is nothing more to do with them. | |
1571 | * For items which were logged, we will keep pointers to them | |
1572 | * so they can be unpinned after the transaction commits to disk. | |
1573 | * This will also stamp each modified meta-data item with | |
1574 | * the commit lsn of this transaction for dependency tracking | |
1575 | * purposes. | |
1576 | */ | |
0924378a | 1577 | xfs_trans_unlock_items(tp, *commit_lsn); |
1da177e4 LT |
1578 | |
1579 | /* | |
1580 | * If we detected a log error earlier, finish committing | |
1581 | * the transaction now (unpin log items, etc). | |
1582 | * | |
1583 | * Order is critical here, to avoid using the transaction | |
1584 | * pointer after its been freed (by xfs_trans_committed | |
1585 | * either here now, or as a callback). We cannot do this | |
1586 | * step inside xfs_log_notify as was done earlier because | |
1587 | * of this issue. | |
1588 | */ | |
1589 | if (shutdown) | |
1590 | xfs_trans_committed(tp, XFS_LI_ABORTED); | |
1591 | ||
1592 | /* | |
1593 | * Now that the xfs_trans_committed callback has been attached, | |
1594 | * and the items are released we can finally allow the iclog to | |
1595 | * go to disk. | |
1596 | */ | |
0924378a DC |
1597 | return xfs_log_release_iclog(mp, commit_iclog); |
1598 | } | |
1599 | ||
71e330b5 DC |
1600 | /* |
1601 | * Walk the log items and allocate log vector structures for | |
1602 | * each item large enough to fit all the vectors they require. | |
1603 | * Note that this format differs from the old log vector format in | |
1604 | * that there is no transaction header in these log vectors. | |
1605 | */ | |
1606 | STATIC struct xfs_log_vec * | |
1607 | xfs_trans_alloc_log_vecs( | |
1608 | xfs_trans_t *tp) | |
1609 | { | |
e98c414f | 1610 | struct xfs_log_item_desc *lidp; |
71e330b5 DC |
1611 | struct xfs_log_vec *lv = NULL; |
1612 | struct xfs_log_vec *ret_lv = NULL; | |
1613 | ||
71e330b5 DC |
1614 | |
1615 | /* Bail out if we didn't find a log item. */ | |
e98c414f | 1616 | if (list_empty(&tp->t_items)) { |
71e330b5 DC |
1617 | ASSERT(0); |
1618 | return NULL; | |
1619 | } | |
1620 | ||
e98c414f | 1621 | list_for_each_entry(lidp, &tp->t_items, lid_trans) { |
71e330b5 DC |
1622 | struct xfs_log_vec *new_lv; |
1623 | ||
1624 | /* Skip items which aren't dirty in this transaction. */ | |
e98c414f | 1625 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) |
71e330b5 | 1626 | continue; |
71e330b5 DC |
1627 | |
1628 | /* Skip items that do not have any vectors for writing */ | |
1629 | lidp->lid_size = IOP_SIZE(lidp->lid_item); | |
e98c414f | 1630 | if (!lidp->lid_size) |
71e330b5 | 1631 | continue; |
71e330b5 DC |
1632 | |
1633 | new_lv = kmem_zalloc(sizeof(*new_lv) + | |
1634 | lidp->lid_size * sizeof(struct xfs_log_iovec), | |
1635 | KM_SLEEP); | |
1636 | ||
1637 | /* The allocated iovec region lies beyond the log vector. */ | |
1638 | new_lv->lv_iovecp = (struct xfs_log_iovec *)&new_lv[1]; | |
1639 | new_lv->lv_niovecs = lidp->lid_size; | |
1640 | new_lv->lv_item = lidp->lid_item; | |
1641 | if (!ret_lv) | |
1642 | ret_lv = new_lv; | |
1643 | else | |
1644 | lv->lv_next = new_lv; | |
1645 | lv = new_lv; | |
71e330b5 DC |
1646 | } |
1647 | ||
1648 | return ret_lv; | |
1649 | } | |
1650 | ||
1651 | static int | |
1652 | xfs_trans_commit_cil( | |
1653 | struct xfs_mount *mp, | |
1654 | struct xfs_trans *tp, | |
1655 | xfs_lsn_t *commit_lsn, | |
1656 | int flags) | |
1657 | { | |
1658 | struct xfs_log_vec *log_vector; | |
1659 | int error; | |
1660 | ||
1661 | /* | |
1662 | * Get each log item to allocate a vector structure for | |
1663 | * the log item to to pass to the log write code. The | |
1664 | * CIL commit code will format the vector and save it away. | |
1665 | */ | |
1666 | log_vector = xfs_trans_alloc_log_vecs(tp); | |
1667 | if (!log_vector) | |
1668 | return ENOMEM; | |
1669 | ||
1670 | error = xfs_log_commit_cil(mp, tp, log_vector, commit_lsn, flags); | |
1671 | if (error) | |
1672 | return error; | |
1673 | ||
1674 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 DC |
1675 | xfs_trans_free(tp); |
1676 | return 0; | |
1677 | } | |
0924378a DC |
1678 | |
1679 | /* | |
1680 | * xfs_trans_commit | |
1681 | * | |
1682 | * Commit the given transaction to the log a/synchronously. | |
1683 | * | |
1684 | * XFS disk error handling mechanism is not based on a typical | |
1685 | * transaction abort mechanism. Logically after the filesystem | |
1686 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
1687 | * be durable - ie. committed to disk - because some metadata might | |
1688 | * be inconsistent. In such cases, this returns an error, and the | |
1689 | * caller may assume that all locked objects joined to the transaction | |
1690 | * have already been unlocked as if the commit had succeeded. | |
1691 | * Do not reference the transaction structure after this call. | |
1692 | */ | |
0924378a DC |
1693 | int |
1694 | _xfs_trans_commit( | |
a3ccd2ca CH |
1695 | struct xfs_trans *tp, |
1696 | uint flags, | |
1697 | int *log_flushed) | |
0924378a | 1698 | { |
a3ccd2ca | 1699 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 1700 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 1701 | int error = 0; |
0924378a DC |
1702 | int log_flags = 0; |
1703 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
1704 | |
1705 | /* | |
1706 | * Determine whether this commit is releasing a permanent | |
1707 | * log reservation or not. | |
1708 | */ | |
1709 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1710 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1711 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * If there is nothing to be logged by the transaction, | |
1716 | * then unlock all of the items associated with the | |
1717 | * transaction and free the transaction structure. | |
1718 | * Also make sure to return any reserved blocks to | |
1719 | * the free pool. | |
1720 | */ | |
a3ccd2ca CH |
1721 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
1722 | goto out_unreserve; | |
1723 | ||
1724 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
1725 | error = XFS_ERROR(EIO); | |
1726 | goto out_unreserve; | |
0924378a | 1727 | } |
a3ccd2ca | 1728 | |
0924378a DC |
1729 | ASSERT(tp->t_ticket != NULL); |
1730 | ||
1731 | /* | |
1732 | * If we need to update the superblock, then do it now. | |
1733 | */ | |
1734 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
1735 | xfs_trans_apply_sb_deltas(tp); | |
1736 | xfs_trans_apply_dquot_deltas(tp); | |
1737 | ||
71e330b5 DC |
1738 | if (mp->m_flags & XFS_MOUNT_DELAYLOG) |
1739 | error = xfs_trans_commit_cil(mp, tp, &commit_lsn, flags); | |
1740 | else | |
1741 | error = xfs_trans_commit_iclog(mp, tp, &commit_lsn, flags); | |
1742 | ||
0924378a DC |
1743 | if (error == ENOMEM) { |
1744 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); | |
a3ccd2ca CH |
1745 | error = XFS_ERROR(EIO); |
1746 | goto out_unreserve; | |
0924378a | 1747 | } |
1da177e4 LT |
1748 | |
1749 | /* | |
1750 | * If the transaction needs to be synchronous, then force the | |
1751 | * log out now and wait for it. | |
1752 | */ | |
1753 | if (sync) { | |
f538d4da | 1754 | if (!error) { |
a14a348b CH |
1755 | error = _xfs_log_force_lsn(mp, commit_lsn, |
1756 | XFS_LOG_SYNC, log_flushed); | |
f538d4da | 1757 | } |
1da177e4 LT |
1758 | XFS_STATS_INC(xs_trans_sync); |
1759 | } else { | |
1760 | XFS_STATS_INC(xs_trans_async); | |
1761 | } | |
1762 | ||
a3ccd2ca CH |
1763 | return error; |
1764 | ||
1765 | out_unreserve: | |
1766 | xfs_trans_unreserve_and_mod_sb(tp); | |
1767 | ||
1768 | /* | |
1769 | * It is indeed possible for the transaction to be not dirty but | |
1770 | * the dqinfo portion to be. All that means is that we have some | |
1771 | * (non-persistent) quota reservations that need to be unreserved. | |
1772 | */ | |
1773 | xfs_trans_unreserve_and_mod_dquots(tp); | |
1774 | if (tp->t_ticket) { | |
1775 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
1776 | if (commit_lsn == -1 && !error) | |
1777 | error = XFS_ERROR(EIO); | |
1778 | } | |
1779 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 1780 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
1781 | xfs_trans_free(tp); |
1782 | ||
1783 | XFS_STATS_INC(xs_trans_empty); | |
1784 | return error; | |
1da177e4 LT |
1785 | } |
1786 | ||
1da177e4 LT |
1787 | /* |
1788 | * Unlock all of the transaction's items and free the transaction. | |
1789 | * The transaction must not have modified any of its items, because | |
1790 | * there is no way to restore them to their previous state. | |
1791 | * | |
1792 | * If the transaction has made a log reservation, make sure to release | |
1793 | * it as well. | |
1794 | */ | |
1795 | void | |
1796 | xfs_trans_cancel( | |
1797 | xfs_trans_t *tp, | |
1798 | int flags) | |
1799 | { | |
1800 | int log_flags; | |
0733af21 | 1801 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1802 | |
1803 | /* | |
1804 | * See if the caller is being too lazy to figure out if | |
1805 | * the transaction really needs an abort. | |
1806 | */ | |
1807 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
1808 | flags &= ~XFS_TRANS_ABORT; | |
1809 | /* | |
1810 | * See if the caller is relying on us to shut down the | |
1811 | * filesystem. This happens in paths where we detect | |
1812 | * corruption and decide to give up. | |
1813 | */ | |
60a204f0 | 1814 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1815 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1816 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1817 | } |
1da177e4 | 1818 | #ifdef DEBUG |
e98c414f CH |
1819 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
1820 | struct xfs_log_item_desc *lidp; | |
1821 | ||
1822 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
1823 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1824 | } |
1825 | #endif | |
1826 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1827 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
1828 | |
1829 | if (tp->t_ticket) { | |
1830 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1831 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1832 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1833 | } else { | |
1834 | log_flags = 0; | |
1835 | } | |
0733af21 | 1836 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1837 | } |
1838 | ||
1839 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1840 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 1841 | |
71e330b5 | 1842 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
1843 | xfs_trans_free(tp); |
1844 | } | |
1845 | ||
322ff6b8 NS |
1846 | /* |
1847 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1848 | * the next: permanent transactions are only flushed out when | |
1849 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
1850 | * as possible to let chunks of it go to the log. So we commit the | |
1851 | * chunk we've been working on and get a new transaction to continue. | |
1852 | */ | |
1853 | int | |
1854 | xfs_trans_roll( | |
1855 | struct xfs_trans **tpp, | |
1856 | struct xfs_inode *dp) | |
1857 | { | |
1858 | struct xfs_trans *trans; | |
1859 | unsigned int logres, count; | |
1860 | int error; | |
1861 | ||
1862 | /* | |
1863 | * Ensure that the inode is always logged. | |
1864 | */ | |
1865 | trans = *tpp; | |
1866 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1867 | ||
1868 | /* | |
1869 | * Copy the critical parameters from one trans to the next. | |
1870 | */ | |
1871 | logres = trans->t_log_res; | |
1872 | count = trans->t_log_count; | |
1873 | *tpp = xfs_trans_dup(trans); | |
1874 | ||
1875 | /* | |
1876 | * Commit the current transaction. | |
1877 | * If this commit failed, then it'd just unlock those items that | |
1878 | * are not marked ihold. That also means that a filesystem shutdown | |
1879 | * is in progress. The caller takes the responsibility to cancel | |
1880 | * the duplicate transaction that gets returned. | |
1881 | */ | |
1882 | error = xfs_trans_commit(trans, 0); | |
1883 | if (error) | |
1884 | return (error); | |
1885 | ||
1886 | trans = *tpp; | |
1887 | ||
cc09c0dc DC |
1888 | /* |
1889 | * transaction commit worked ok so we can drop the extra ticket | |
1890 | * reference that we gained in xfs_trans_dup() | |
1891 | */ | |
1892 | xfs_log_ticket_put(trans->t_ticket); | |
1893 | ||
1894 | ||
322ff6b8 NS |
1895 | /* |
1896 | * Reserve space in the log for th next transaction. | |
1897 | * This also pushes items in the "AIL", the list of logged items, | |
1898 | * out to disk if they are taking up space at the tail of the log | |
1899 | * that we want to use. This requires that either nothing be locked | |
1900 | * across this call, or that anything that is locked be logged in | |
1901 | * the prior and the next transactions. | |
1902 | */ | |
1903 | error = xfs_trans_reserve(trans, 0, logres, 0, | |
1904 | XFS_TRANS_PERM_LOG_RES, count); | |
1905 | /* | |
1906 | * Ensure that the inode is in the new transaction and locked. | |
1907 | */ | |
1908 | if (error) | |
1909 | return error; | |
1910 | ||
898621d5 | 1911 | xfs_trans_ijoin(trans, dp); |
322ff6b8 NS |
1912 | return 0; |
1913 | } |