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" |
1da177e4 LT |
22 | #include "xfs_log.h" |
23 | #include "xfs_trans.h" | |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
1da177e4 LT |
26 | #include "xfs_mount.h" |
27 | #include "xfs_error.h" | |
a844f451 | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_bmap_btree.h" |
a844f451 | 30 | #include "xfs_alloc_btree.h" |
1da177e4 | 31 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
32 | #include "xfs_dinode.h" |
33 | #include "xfs_inode.h" | |
a844f451 NS |
34 | #include "xfs_btree.h" |
35 | #include "xfs_ialloc.h" | |
36 | #include "xfs_alloc.h" | |
efc27b52 | 37 | #include "xfs_extent_busy.h" |
1da177e4 | 38 | #include "xfs_bmap.h" |
1da177e4 | 39 | #include "xfs_quota.h" |
a844f451 | 40 | #include "xfs_trans_priv.h" |
1da177e4 | 41 | #include "xfs_trans_space.h" |
322ff6b8 | 42 | #include "xfs_inode_item.h" |
ed3b4d6c | 43 | #include "xfs_trace.h" |
1da177e4 | 44 | |
8f794055 | 45 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 46 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 47 | |
025101dc | 48 | |
8f794055 | 49 | /* |
025101dc CH |
50 | * 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 | |
8f794055 | 82 | */ |
8f794055 | 83 | STATIC uint |
025101dc CH |
84 | xfs_calc_write_reservation( |
85 | struct xfs_mount *mp) | |
8f794055 | 86 | { |
025101dc CH |
87 | 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)))); | |
8f794055 NS |
100 | } |
101 | ||
025101dc CH |
102 | /* |
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 | */ | |
8f794055 | 115 | STATIC uint |
025101dc CH |
116 | xfs_calc_itruncate_reservation( |
117 | struct xfs_mount *mp) | |
8f794055 | 118 | { |
025101dc CH |
119 | 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)))); | |
8f794055 NS |
132 | } |
133 | ||
025101dc CH |
134 | /* |
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 | */ | |
8f794055 | 146 | STATIC uint |
025101dc CH |
147 | xfs_calc_rename_reservation( |
148 | struct xfs_mount *mp) | |
8f794055 | 149 | { |
025101dc CH |
150 | 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)))); | |
8f794055 NS |
159 | } |
160 | ||
025101dc CH |
161 | /* |
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 | */ | |
8f794055 | 173 | STATIC uint |
025101dc CH |
174 | xfs_calc_link_reservation( |
175 | struct xfs_mount *mp) | |
8f794055 | 176 | { |
025101dc CH |
177 | 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)))); | |
8f794055 NS |
187 | } |
188 | ||
025101dc CH |
189 | /* |
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 | */ | |
8f794055 | 201 | STATIC uint |
025101dc CH |
202 | xfs_calc_remove_reservation( |
203 | struct xfs_mount *mp) | |
8f794055 | 204 | { |
025101dc CH |
205 | 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)))); | |
8f794055 NS |
215 | } |
216 | ||
025101dc CH |
217 | /* |
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 | */ | |
8f794055 | 231 | STATIC uint |
025101dc CH |
232 | xfs_calc_symlink_reservation( |
233 | struct xfs_mount *mp) | |
8f794055 | 234 | { |
025101dc CH |
235 | 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)))); | |
8f794055 NS |
248 | } |
249 | ||
025101dc CH |
250 | /* |
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 | */ | |
8f794055 | 265 | STATIC uint |
025101dc CH |
266 | xfs_calc_create_reservation( |
267 | struct xfs_mount *mp) | |
8f794055 | 268 | { |
025101dc CH |
269 | 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)))); | |
8f794055 NS |
282 | } |
283 | ||
025101dc CH |
284 | /* |
285 | * Making a new directory is the same as creating a new file. | |
286 | */ | |
8f794055 | 287 | STATIC uint |
025101dc CH |
288 | xfs_calc_mkdir_reservation( |
289 | struct xfs_mount *mp) | |
8f794055 | 290 | { |
025101dc | 291 | return xfs_calc_create_reservation(mp); |
8f794055 NS |
292 | } |
293 | ||
025101dc CH |
294 | /* |
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 | */ | |
8f794055 | 304 | STATIC uint |
025101dc CH |
305 | xfs_calc_ifree_reservation( |
306 | struct xfs_mount *mp) | |
8f794055 | 307 | { |
025101dc CH |
308 | 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)); | |
8f794055 NS |
319 | } |
320 | ||
025101dc CH |
321 | /* |
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 | */ | |
8f794055 | 325 | STATIC uint |
025101dc CH |
326 | xfs_calc_ichange_reservation( |
327 | struct xfs_mount *mp) | |
8f794055 | 328 | { |
025101dc CH |
329 | return XFS_DQUOT_LOGRES(mp) + |
330 | mp->m_sb.sb_inodesize + | |
331 | mp->m_sb.sb_sectsize + | |
332 | 512; | |
333 | ||
8f794055 NS |
334 | } |
335 | ||
025101dc CH |
336 | /* |
337 | * Growing the data section of the filesystem. | |
338 | * superblock | |
339 | * agi and agf | |
340 | * allocation btrees | |
341 | */ | |
8f794055 | 342 | STATIC uint |
025101dc CH |
343 | xfs_calc_growdata_reservation( |
344 | struct xfs_mount *mp) | |
8f794055 | 345 | { |
025101dc CH |
346 | return mp->m_sb.sb_sectsize * 3 + |
347 | XFS_ALLOCFREE_LOG_RES(mp, 1) + | |
348 | 128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1)); | |
8f794055 NS |
349 | } |
350 | ||
025101dc CH |
351 | /* |
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 | */ | |
8f794055 | 361 | STATIC uint |
025101dc CH |
362 | xfs_calc_growrtalloc_reservation( |
363 | struct xfs_mount *mp) | |
8f794055 | 364 | { |
025101dc CH |
365 | 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)); | |
8f794055 NS |
371 | } |
372 | ||
025101dc CH |
373 | /* |
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 | */ | |
8f794055 | 378 | STATIC uint |
025101dc CH |
379 | xfs_calc_growrtzero_reservation( |
380 | struct xfs_mount *mp) | |
8f794055 | 381 | { |
025101dc | 382 | return mp->m_sb.sb_blocksize + 128; |
8f794055 NS |
383 | } |
384 | ||
025101dc CH |
385 | /* |
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 | */ | |
8f794055 | 395 | STATIC uint |
025101dc CH |
396 | xfs_calc_growrtfree_reservation( |
397 | struct xfs_mount *mp) | |
8f794055 | 398 | { |
025101dc CH |
399 | 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; | |
8f794055 NS |
404 | } |
405 | ||
025101dc CH |
406 | /* |
407 | * Logging the inode modification timestamp on a synchronous write. | |
408 | * inode | |
409 | */ | |
8f794055 | 410 | STATIC uint |
025101dc CH |
411 | xfs_calc_swrite_reservation( |
412 | struct xfs_mount *mp) | |
8f794055 | 413 | { |
025101dc | 414 | return mp->m_sb.sb_inodesize + 128; |
8f794055 NS |
415 | } |
416 | ||
025101dc CH |
417 | /* |
418 | * Logging the inode mode bits when writing a setuid/setgid file | |
419 | * inode | |
420 | */ | |
8f794055 NS |
421 | STATIC uint |
422 | xfs_calc_writeid_reservation(xfs_mount_t *mp) | |
423 | { | |
025101dc | 424 | return mp->m_sb.sb_inodesize + 128; |
8f794055 NS |
425 | } |
426 | ||
025101dc CH |
427 | /* |
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 | */ | |
8f794055 | 435 | STATIC uint |
025101dc CH |
436 | xfs_calc_addafork_reservation( |
437 | struct xfs_mount *mp) | |
8f794055 | 438 | { |
025101dc CH |
439 | 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)); | |
8f794055 NS |
447 | } |
448 | ||
025101dc CH |
449 | /* |
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 | */ | |
8f794055 | 460 | STATIC uint |
025101dc CH |
461 | xfs_calc_attrinval_reservation( |
462 | struct xfs_mount *mp) | |
8f794055 | 463 | { |
025101dc CH |
464 | 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)))); | |
8f794055 NS |
472 | } |
473 | ||
025101dc CH |
474 | /* |
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 | */ | |
8f794055 | 484 | STATIC uint |
025101dc CH |
485 | xfs_calc_attrset_reservation( |
486 | struct xfs_mount *mp) | |
8f794055 | 487 | { |
025101dc CH |
488 | 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); | |
8f794055 NS |
493 | } |
494 | ||
025101dc CH |
495 | /* |
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 | */ | |
8f794055 | 506 | STATIC uint |
025101dc CH |
507 | xfs_calc_attrrm_reservation( |
508 | struct xfs_mount *mp) | |
8f794055 | 509 | { |
025101dc CH |
510 | 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)))); | |
8f794055 NS |
521 | } |
522 | ||
025101dc CH |
523 | /* |
524 | * Clearing a bad agino number in an agi hash bucket. | |
525 | */ | |
8f794055 | 526 | STATIC uint |
025101dc CH |
527 | xfs_calc_clear_agi_bucket_reservation( |
528 | struct xfs_mount *mp) | |
8f794055 | 529 | { |
025101dc | 530 | return mp->m_sb.sb_sectsize + 128; |
8f794055 NS |
531 | } |
532 | ||
1da177e4 LT |
533 | /* |
534 | * Initialize the precomputed transaction reservation values | |
535 | * in the mount structure. | |
536 | */ | |
537 | void | |
538 | xfs_trans_init( | |
025101dc | 539 | struct xfs_mount *mp) |
1da177e4 | 540 | { |
025101dc | 541 | struct xfs_trans_reservations *resp = &mp->m_reservations; |
1da177e4 | 542 | |
8f794055 NS |
543 | 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); | |
1da177e4 LT |
564 | } |
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. | |
b2ce3974 AE |
570 | * |
571 | * Dynamically allocate the transaction structure from the transaction | |
572 | * zone, initialize it, and return it to the caller. | |
1da177e4 | 573 | */ |
b2ce3974 AE |
574 | xfs_trans_t * |
575 | xfs_trans_alloc( | |
576 | xfs_mount_t *mp, | |
577 | uint type) | |
578 | { | |
d9457dc0 JK |
579 | 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; | |
b2ce3974 AE |
585 | } |
586 | ||
587 | xfs_trans_t * | |
1da177e4 | 588 | _xfs_trans_alloc( |
b2ce3974 AE |
589 | xfs_mount_t *mp, |
590 | uint type, | |
77ba7877 | 591 | xfs_km_flags_t memflags) |
1da177e4 | 592 | { |
b2ce3974 | 593 | xfs_trans_t *tp; |
1da177e4 | 594 | |
d9457dc0 | 595 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
34327e13 | 596 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 597 | |
80641dc6 | 598 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
1da177e4 LT |
599 | tp->t_magic = XFS_TRANS_MAGIC; |
600 | tp->t_type = type; | |
601 | tp->t_mountp = mp; | |
e98c414f | 602 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 603 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 604 | return tp; |
1da177e4 LT |
605 | } |
606 | ||
b1c1b5b6 DC |
607 | /* |
608 | * Free the transaction structure. If there is more clean up | |
609 | * to do when the structure is freed, add it here. | |
610 | */ | |
611 | STATIC void | |
612 | xfs_trans_free( | |
ed3b4d6c | 613 | struct xfs_trans *tp) |
b1c1b5b6 | 614 | { |
4ecbfe63 DC |
615 | xfs_extent_busy_sort(&tp->t_busy); |
616 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 617 | |
b1c1b5b6 | 618 | atomic_dec(&tp->t_mountp->m_active_trans); |
d9457dc0 JK |
619 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
620 | sb_end_intwrite(tp->t_mountp->m_super); | |
b1c1b5b6 DC |
621 | xfs_trans_free_dqinfo(tp); |
622 | kmem_zone_free(xfs_trans_zone, tp); | |
623 | } | |
624 | ||
1da177e4 LT |
625 | /* |
626 | * 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 | */ | |
633 | xfs_trans_t * | |
634 | xfs_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; | |
e98c414f | 647 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 648 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
649 | |
650 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 651 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 652 | |
d9457dc0 JK |
653 | 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; | |
cc09c0dc | 658 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
659 | 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; | |
59c1b082 | 663 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 664 | |
7d095257 | 665 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
666 | |
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 | */ | |
685 | int | |
686 | xfs_trans_reserve( | |
687 | xfs_trans_t *tp, | |
688 | uint blocks, | |
689 | uint logspace, | |
690 | uint rtextents, | |
691 | uint flags, | |
692 | uint logcount) | |
693 | { | |
59c1b082 NS |
694 | int error = 0; |
695 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
696 | |
697 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 698 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
699 | |
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) { | |
96540c78 | 706 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 707 | -((int64_t)blocks), rsvd); |
1da177e4 | 708 | if (error != 0) { |
59c1b082 | 709 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
710 | 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) { | |
9006fb91 CH |
719 | 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 | ||
1da177e4 | 724 | if (flags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 725 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 726 | permanent = true; |
1da177e4 LT |
727 | } else { |
728 | ASSERT(tp->t_ticket == NULL); | |
729 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
730 | } |
731 | ||
9006fb91 CH |
732 | 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); | |
1da177e4 | 740 | } |
9006fb91 CH |
741 | |
742 | if (error) | |
743 | goto undo_blocks; | |
744 | ||
1da177e4 LT |
745 | 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, | |
20f4ebf2 | 756 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
757 | 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 | */ | |
770 | undo_log: | |
771 | if (logspace > 0) { | |
9006fb91 CH |
772 | int log_flags; |
773 | ||
1da177e4 LT |
774 | 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 | ||
785 | undo_blocks: | |
786 | if (blocks > 0) { | |
96540c78 | 787 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 788 | (int64_t)blocks, rsvd); |
1da177e4 LT |
789 | tp->t_blk_res = 0; |
790 | } | |
791 | ||
59c1b082 | 792 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 793 | |
59c1b082 | 794 | return error; |
1da177e4 LT |
795 | } |
796 | ||
1da177e4 LT |
797 | /* |
798 | * 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. | |
92821e2b DC |
804 | * |
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. | |
1da177e4 LT |
812 | */ |
813 | void | |
814 | xfs_trans_mod_sb( | |
815 | xfs_trans_t *tp, | |
816 | uint field, | |
20f4ebf2 | 817 | int64_t delta) |
1da177e4 | 818 | { |
92821e2b DC |
819 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
820 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
821 | |
822 | switch (field) { | |
823 | case XFS_TRANS_SB_ICOUNT: | |
824 | tp->t_icount_delta += delta; | |
92821e2b DC |
825 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
826 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
827 | break; |
828 | case XFS_TRANS_SB_IFREE: | |
829 | tp->t_ifree_delta += delta; | |
92821e2b DC |
830 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
831 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
832 | 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; | |
92821e2b DC |
844 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
845 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
846 | 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; | |
92821e2b DC |
855 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
856 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
857 | 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 | |
c41564b5 | 873 | * in-core superblock's counter. This should only |
1da177e4 LT |
874 | * 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 | ||
210c6f1c | 910 | tp->t_flags |= flags; |
1da177e4 LT |
911 | } |
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 | */ | |
921 | STATIC void | |
922 | xfs_trans_apply_sb_deltas( | |
923 | xfs_trans_t *tp) | |
924 | { | |
2bdf7cd0 | 925 | xfs_dsb_t *sbp; |
1da177e4 LT |
926 | 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 | ||
92821e2b DC |
939 | /* |
940 | * Only update the superblock counters if we are logging them | |
941 | */ | |
942 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 943 | if (tp->t_icount_delta) |
413d57c9 | 944 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 945 | if (tp->t_ifree_delta) |
413d57c9 | 946 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 947 | if (tp->t_fdblocks_delta) |
413d57c9 | 948 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 949 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 950 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
951 | } |
952 | ||
2bdf7cd0 | 953 | if (tp->t_frextents_delta) |
413d57c9 | 954 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 955 | if (tp->t_res_frextents_delta) |
413d57c9 | 956 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
957 | |
958 | if (tp->t_dblocks_delta) { | |
413d57c9 | 959 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
960 | whole = 1; |
961 | } | |
2bdf7cd0 | 962 | if (tp->t_agcount_delta) { |
413d57c9 | 963 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
964 | whole = 1; |
965 | } | |
2bdf7cd0 CH |
966 | if (tp->t_imaxpct_delta) { |
967 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
968 | whole = 1; |
969 | } | |
2bdf7cd0 | 970 | if (tp->t_rextsize_delta) { |
413d57c9 | 971 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
972 | whole = 1; |
973 | } | |
2bdf7cd0 | 974 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 975 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
976 | whole = 1; |
977 | } | |
2bdf7cd0 | 978 | if (tp->t_rblocks_delta) { |
413d57c9 | 979 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
980 | whole = 1; |
981 | } | |
2bdf7cd0 | 982 | if (tp->t_rextents_delta) { |
413d57c9 | 983 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
984 | whole = 1; |
985 | } | |
2bdf7cd0 CH |
986 | if (tp->t_rextslog_delta) { |
987 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
988 | whole = 1; |
989 | } | |
990 | ||
991 | if (whole) | |
992 | /* | |
c41564b5 | 993 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 994 | */ |
2bdf7cd0 | 995 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
996 | else |
997 | /* | |
998 | * Since all the modifiable fields are contiguous, we | |
999 | * can get away with this. | |
1000 | */ | |
2bdf7cd0 CH |
1001 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
1002 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 1003 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | /* | |
45c34141 DC |
1007 | * 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. | |
1da177e4 LT |
1012 | * |
1013 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
1014 | * 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. | |
1da177e4 | 1024 | */ |
71e330b5 | 1025 | void |
1da177e4 LT |
1026 | xfs_trans_unreserve_and_mod_sb( |
1027 | xfs_trans_t *tp) | |
1028 | { | |
1b040712 | 1029 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 1030 | xfs_mod_sb_t *msbp; |
92821e2b | 1031 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1032 | /* REFERENCED */ |
1033 | int error; | |
1034 | int rsvd; | |
45c34141 DC |
1035 | int64_t blkdelta = 0; |
1036 | int64_t rtxdelta = 0; | |
1b040712 CH |
1037 | int64_t idelta = 0; |
1038 | int64_t ifreedelta = 0; | |
1da177e4 LT |
1039 | |
1040 | msbp = msb; | |
1041 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1042 | ||
1b040712 | 1043 | /* calculate deltas */ |
45c34141 DC |
1044 | if (tp->t_blk_res > 0) |
1045 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
1046 | 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 | ||
45c34141 DC |
1051 | if (tp->t_rtx_res > 0) |
1052 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
1053 | if ((tp->t_frextents_delta != 0) && |
1054 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
1055 | rtxdelta += tp->t_frextents_delta; | |
1056 | ||
1b040712 CH |
1057 | 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 */ | |
45c34141 | 1086 | if (rtxdelta != 0) { |
1da177e4 | 1087 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 1088 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
1089 | msbp++; |
1090 | } | |
1091 | ||
92821e2b | 1092 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
1093 | if (tp->t_dblocks_delta != 0) { |
1094 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 1095 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
1096 | msbp++; |
1097 | } | |
1098 | if (tp->t_agcount_delta != 0) { | |
1099 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 1100 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
1101 | msbp++; |
1102 | } | |
1103 | if (tp->t_imaxpct_delta != 0) { | |
1104 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 1105 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
1106 | msbp++; |
1107 | } | |
1108 | if (tp->t_rextsize_delta != 0) { | |
1109 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 1110 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
1111 | msbp++; |
1112 | } | |
1113 | if (tp->t_rbmblocks_delta != 0) { | |
1114 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 1115 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
1116 | msbp++; |
1117 | } | |
1118 | if (tp->t_rblocks_delta != 0) { | |
1119 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 1120 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
1121 | msbp++; |
1122 | } | |
1123 | if (tp->t_rextents_delta != 0) { | |
1124 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 1125 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
1126 | msbp++; |
1127 | } | |
1128 | if (tp->t_rextslog_delta != 0) { | |
1129 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 1130 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
1131 | 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); | |
1b040712 CH |
1141 | if (error) |
1142 | goto out_undo_ifreecount; | |
1da177e4 | 1143 | } |
1b040712 CH |
1144 | |
1145 | return; | |
1146 | ||
1147 | out_undo_ifreecount: | |
1148 | if (ifreedelta) | |
1149 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); | |
1150 | out_undo_icount: | |
1151 | if (idelta) | |
1152 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); | |
1153 | out_undo_fdblocks: | |
1154 | if (blkdelta) | |
1155 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); | |
1156 | out: | |
1884bd83 | 1157 | ASSERT(error == 0); |
1b040712 | 1158 | return; |
1da177e4 LT |
1159 | } |
1160 | ||
e98c414f CH |
1161 | /* |
1162 | * 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 | */ | |
1166 | void | |
1167 | xfs_trans_add_item( | |
1168 | struct xfs_trans *tp, | |
1169 | struct xfs_log_item *lip) | |
1170 | { | |
1171 | struct xfs_log_item_desc *lidp; | |
1172 | ||
f65020a8 JJ |
1173 | ASSERT(lip->li_mountp == tp->t_mountp); |
1174 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 1175 | |
43869706 | 1176 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
1177 | |
1178 | lidp->lid_item = lip; | |
1179 | lidp->lid_flags = 0; | |
e98c414f CH |
1180 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
1181 | ||
1182 | lip->li_desc = lidp; | |
1183 | } | |
1184 | ||
1185 | STATIC void | |
1186 | xfs_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 | */ | |
1196 | void | |
1197 | xfs_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 | */ | |
d17c701c | 1208 | void |
e98c414f CH |
1209 | xfs_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 | ||
0e57f6a3 DC |
1231 | static inline void |
1232 | xfs_log_item_batch_insert( | |
1233 | struct xfs_ail *ailp, | |
1d8c95a3 | 1234 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
1235 | 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 */ | |
1d8c95a3 | 1243 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 DC |
1244 | |
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. | |
e34a314c DC |
1253 | * |
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. | |
1d8c95a3 DC |
1261 | * |
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. | |
0e57f6a3 DC |
1268 | */ |
1269 | void | |
1270 | xfs_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; | |
1d8c95a3 | 1279 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
1280 | int i = 0; |
1281 | ||
1d8c95a3 DC |
1282 | spin_lock(&ailp->xa_lock); |
1283 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
1284 | spin_unlock(&ailp->xa_lock); | |
1285 | ||
0e57f6a3 DC |
1286 | /* 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 | ||
1316d4da | 1295 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
1296 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
1297 | continue; | |
1298 | ||
e34a314c DC |
1299 | /* |
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 | ||
0e57f6a3 DC |
1309 | 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 | |
1d8c95a3 DC |
1314 | * we have the ail lock. Then unpin the item. This does |
1315 | * not affect the AIL cursor the bulk insert path is | |
1316 | * using. | |
0e57f6a3 DC |
1317 | */ |
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) { | |
1d8c95a3 | 1330 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
1331 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
1332 | i = 0; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | /* make sure we insert the remainder! */ | |
1337 | if (i) | |
1d8c95a3 DC |
1338 | 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); | |
0e57f6a3 DC |
1343 | } |
1344 | ||
0924378a | 1345 | /* |
b1037058 | 1346 | * Commit the given transaction to the log. |
0924378a DC |
1347 | * |
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 | */ | |
0924378a | 1357 | int |
b1037058 | 1358 | xfs_trans_commit( |
a3ccd2ca | 1359 | struct xfs_trans *tp, |
b1037058 | 1360 | uint flags) |
0924378a | 1361 | { |
a3ccd2ca | 1362 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 1363 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 1364 | int error = 0; |
0924378a DC |
1365 | int log_flags = 0; |
1366 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
1367 | |
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 | */ | |
a3ccd2ca CH |
1384 | 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; | |
0924378a | 1390 | } |
a3ccd2ca | 1391 | |
0924378a DC |
1392 | 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 | ||
0244b960 | 1401 | error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
0924378a DC |
1402 | if (error == ENOMEM) { |
1403 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); | |
a3ccd2ca CH |
1404 | error = XFS_ERROR(EIO); |
1405 | goto out_unreserve; | |
0924378a | 1406 | } |
1da177e4 | 1407 | |
0244b960 CH |
1408 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1409 | xfs_trans_free(tp); | |
1410 | ||
1da177e4 LT |
1411 | /* |
1412 | * If the transaction needs to be synchronous, then force the | |
1413 | * log out now and wait for it. | |
1414 | */ | |
1415 | if (sync) { | |
f538d4da | 1416 | if (!error) { |
a14a348b | 1417 | error = _xfs_log_force_lsn(mp, commit_lsn, |
b1037058 | 1418 | XFS_LOG_SYNC, NULL); |
f538d4da | 1419 | } |
1da177e4 LT |
1420 | XFS_STATS_INC(xs_trans_sync); |
1421 | } else { | |
1422 | XFS_STATS_INC(xs_trans_async); | |
1423 | } | |
1424 | ||
a3ccd2ca CH |
1425 | return error; |
1426 | ||
1427 | out_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); | |
71e330b5 | 1442 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
1443 | xfs_trans_free(tp); |
1444 | ||
1445 | XFS_STATS_INC(xs_trans_empty); | |
1446 | return error; | |
1da177e4 LT |
1447 | } |
1448 | ||
1da177e4 LT |
1449 | /* |
1450 | * 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 | */ | |
1457 | void | |
1458 | xfs_trans_cancel( | |
1459 | xfs_trans_t *tp, | |
1460 | int flags) | |
1461 | { | |
1462 | int log_flags; | |
0733af21 | 1463 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1464 | |
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 | */ | |
60a204f0 | 1476 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1477 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1478 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1479 | } |
1da177e4 | 1480 | #ifdef DEBUG |
e98c414f CH |
1481 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
1482 | struct xfs_log_item_desc *lidp; | |
1483 | ||
1484 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
1485 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1486 | } |
1487 | #endif | |
1488 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1489 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
1490 | |
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 | } | |
0733af21 | 1498 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1499 | } |
1500 | ||
1501 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1502 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 1503 | |
71e330b5 | 1504 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
1505 | xfs_trans_free(tp); |
1506 | } | |
1507 | ||
322ff6b8 NS |
1508 | /* |
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 | */ | |
1515 | int | |
1516 | xfs_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 | ||
cc09c0dc DC |
1550 | /* |
1551 | * 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 | ||
322ff6b8 NS |
1557 | /* |
1558 | * 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 | ||
ddc3415a | 1573 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1574 | return 0; |
1575 | } |