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" |
6ca1c906 | 21 | #include "xfs_format.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" |
4f3b5783 | 40 | #include "xfs_qm.h" |
a844f451 | 41 | #include "xfs_trans_priv.h" |
1da177e4 | 42 | #include "xfs_trans_space.h" |
322ff6b8 | 43 | #include "xfs_inode_item.h" |
4f3b5783 JL |
44 | #include "xfs_log_priv.h" |
45 | #include "xfs_buf_item.h" | |
ed3b4d6c | 46 | #include "xfs_trace.h" |
1da177e4 | 47 | |
8f794055 | 48 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 49 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 50 | |
4f3b5783 JL |
51 | /* |
52 | * A buffer has a format structure overhead in the log in addition | |
53 | * to the data, so we need to take this into account when reserving | |
54 | * space in a transaction for a buffer. Round the space required up | |
55 | * to a multiple of 128 bytes so that we don't change the historical | |
56 | * reservation that has been used for this overhead. | |
57 | */ | |
58 | STATIC uint | |
59 | xfs_buf_log_overhead(void) | |
60 | { | |
61 | return round_up(sizeof(struct xlog_op_header) + | |
62 | sizeof(struct xfs_buf_log_format), 128); | |
63 | } | |
64 | ||
65 | /* | |
66 | * Calculate out transaction log reservation per item in bytes. | |
67 | * | |
68 | * The nbufs argument is used to indicate the number of items that | |
69 | * will be changed in a transaction. size is used to tell how many | |
70 | * bytes should be reserved per item. | |
71 | */ | |
72 | STATIC uint | |
73 | xfs_calc_buf_res( | |
74 | uint nbufs, | |
75 | uint size) | |
76 | { | |
77 | return nbufs * (size + xfs_buf_log_overhead()); | |
78 | } | |
025101dc | 79 | |
8f794055 | 80 | /* |
025101dc CH |
81 | * Various log reservation values. |
82 | * | |
83 | * These are based on the size of the file system block because that is what | |
84 | * most transactions manipulate. Each adds in an additional 128 bytes per | |
85 | * item logged to try to account for the overhead of the transaction mechanism. | |
86 | * | |
87 | * Note: Most of the reservations underestimate the number of allocation | |
88 | * groups into which they could free extents in the xfs_bmap_finish() call. | |
89 | * This is because the number in the worst case is quite high and quite | |
90 | * unusual. In order to fix this we need to change xfs_bmap_finish() to free | |
91 | * extents in only a single AG at a time. This will require changes to the | |
92 | * EFI code as well, however, so that the EFI for the extents not freed is | |
93 | * logged again in each transaction. See SGI PV #261917. | |
94 | * | |
95 | * Reservation functions here avoid a huge stack in xfs_trans_init due to | |
96 | * register overflow from temporaries in the calculations. | |
97 | */ | |
98 | ||
99 | ||
100 | /* | |
101 | * In a write transaction we can allocate a maximum of 2 | |
102 | * extents. This gives: | |
103 | * the inode getting the new extents: inode size | |
104 | * the inode's bmap btree: max depth * block size | |
105 | * the agfs of the ags from which the extents are allocated: 2 * sector | |
106 | * the superblock free block counter: sector size | |
107 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
108 | * And the bmap_finish transaction can free bmap blocks in a join: | |
109 | * the agfs of the ags containing the blocks: 2 * sector size | |
110 | * the agfls of the ags containing the blocks: 2 * sector size | |
111 | * the super block free block counter: sector size | |
112 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
8f794055 | 113 | */ |
8f794055 | 114 | STATIC uint |
025101dc CH |
115 | xfs_calc_write_reservation( |
116 | struct xfs_mount *mp) | |
8f794055 | 117 | { |
025101dc | 118 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
119 | MAX((xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
120 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), | |
121 | XFS_FSB_TO_B(mp, 1)) + | |
122 | xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + | |
123 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
124 | XFS_FSB_TO_B(mp, 1))), | |
125 | (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + | |
126 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
127 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
128 | } |
129 | ||
025101dc CH |
130 | /* |
131 | * In truncating a file we free up to two extents at once. We can modify: | |
132 | * the inode being truncated: inode size | |
133 | * the inode's bmap btree: (max depth + 1) * block size | |
134 | * And the bmap_finish transaction can free the blocks and bmap blocks: | |
135 | * the agf for each of the ags: 4 * sector size | |
136 | * the agfl for each of the ags: 4 * sector size | |
137 | * the super block to reflect the freed blocks: sector size | |
138 | * worst case split in allocation btrees per extent assuming 4 extents: | |
139 | * 4 exts * 2 trees * (2 * max depth - 1) * block size | |
140 | * the inode btree: max depth * blocksize | |
141 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
142 | */ | |
8f794055 | 143 | STATIC uint |
025101dc CH |
144 | xfs_calc_itruncate_reservation( |
145 | struct xfs_mount *mp) | |
8f794055 | 146 | { |
025101dc | 147 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
148 | MAX((xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
149 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1, | |
150 | XFS_FSB_TO_B(mp, 1))), | |
151 | (xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + | |
152 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 4), | |
153 | XFS_FSB_TO_B(mp, 1)) + | |
154 | xfs_calc_buf_res(5, 0) + | |
155 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
156 | XFS_FSB_TO_B(mp, 1)) + | |
157 | xfs_calc_buf_res(2 + XFS_IALLOC_BLOCKS(mp) + | |
158 | mp->m_in_maxlevels, 0))); | |
8f794055 NS |
159 | } |
160 | ||
025101dc CH |
161 | /* |
162 | * In renaming a files we can modify: | |
163 | * the four inodes involved: 4 * inode size | |
164 | * the two directory btrees: 2 * (max depth + v2) * dir block size | |
165 | * the two directory bmap btrees: 2 * max depth * block size | |
166 | * And the bmap_finish transaction can free dir and bmap blocks (two sets | |
167 | * of bmap blocks) giving: | |
168 | * the agf for the ags in which the blocks live: 3 * sector size | |
169 | * the agfl for the ags in which the blocks live: 3 * sector size | |
170 | * the superblock for the free block count: sector size | |
171 | * the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size | |
172 | */ | |
8f794055 | 173 | STATIC uint |
025101dc CH |
174 | xfs_calc_rename_reservation( |
175 | struct xfs_mount *mp) | |
8f794055 | 176 | { |
025101dc | 177 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
178 | MAX((xfs_calc_buf_res(4, mp->m_sb.sb_inodesize) + |
179 | xfs_calc_buf_res(2 * XFS_DIROP_LOG_COUNT(mp), | |
180 | XFS_FSB_TO_B(mp, 1))), | |
181 | (xfs_calc_buf_res(7, mp->m_sb.sb_sectsize) + | |
182 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 3), | |
183 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
184 | } |
185 | ||
025101dc CH |
186 | /* |
187 | * For creating a link to an inode: | |
188 | * the parent directory inode: inode size | |
189 | * the linked inode: inode size | |
190 | * the directory btree could split: (max depth + v2) * dir block size | |
191 | * the directory bmap btree could join or split: (max depth + v2) * blocksize | |
192 | * And the bmap_finish transaction can free some bmap blocks giving: | |
193 | * the agf for the ag in which the blocks live: sector size | |
194 | * the agfl for the ag in which the blocks live: sector size | |
195 | * the superblock for the free block count: sector size | |
196 | * the allocation btrees: 2 trees * (2 * max depth - 1) * block size | |
197 | */ | |
8f794055 | 198 | STATIC uint |
025101dc CH |
199 | xfs_calc_link_reservation( |
200 | struct xfs_mount *mp) | |
8f794055 | 201 | { |
025101dc | 202 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
203 | MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + |
204 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), | |
205 | XFS_FSB_TO_B(mp, 1))), | |
206 | (xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + | |
207 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
208 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
209 | } |
210 | ||
025101dc CH |
211 | /* |
212 | * For removing a directory entry we can modify: | |
213 | * the parent directory inode: inode size | |
214 | * the removed inode: inode size | |
215 | * the directory btree could join: (max depth + v2) * dir block size | |
216 | * the directory bmap btree could join or split: (max depth + v2) * blocksize | |
217 | * And the bmap_finish transaction can free the dir and bmap blocks giving: | |
218 | * the agf for the ag in which the blocks live: 2 * sector size | |
219 | * the agfl for the ag in which the blocks live: 2 * sector size | |
220 | * the superblock for the free block count: sector size | |
221 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
222 | */ | |
8f794055 | 223 | STATIC uint |
025101dc CH |
224 | xfs_calc_remove_reservation( |
225 | struct xfs_mount *mp) | |
8f794055 | 226 | { |
025101dc | 227 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
228 | MAX((xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + |
229 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), | |
230 | XFS_FSB_TO_B(mp, 1))), | |
231 | (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + | |
232 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
233 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
234 | } |
235 | ||
025101dc | 236 | /* |
b8402b47 DC |
237 | * For create, break it in to the two cases that the transaction |
238 | * covers. We start with the modify case - allocation done by modification | |
239 | * of the state of existing inodes - and the allocation case. | |
240 | */ | |
241 | ||
242 | /* | |
243 | * For create we can modify: | |
025101dc CH |
244 | * the parent directory inode: inode size |
245 | * the new inode: inode size | |
b8402b47 DC |
246 | * the inode btree entry: block size |
247 | * the superblock for the nlink flag: sector size | |
025101dc CH |
248 | * the directory btree: (max depth + v2) * dir block size |
249 | * the directory inode's bmap btree: (max depth + v2) * block size | |
b8402b47 DC |
250 | */ |
251 | STATIC uint | |
252 | xfs_calc_create_resv_modify( | |
253 | struct xfs_mount *mp) | |
254 | { | |
255 | return xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + | |
256 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
257 | (uint)XFS_FSB_TO_B(mp, 1) + | |
258 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), XFS_FSB_TO_B(mp, 1)); | |
259 | } | |
260 | ||
261 | /* | |
262 | * For create we can allocate some inodes giving: | |
025101dc | 263 | * the agi and agf of the ag getting the new inodes: 2 * sectorsize |
b8402b47 | 264 | * the superblock for the nlink flag: sector size |
025101dc CH |
265 | * the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize |
266 | * the inode btree: max depth * blocksize | |
b8402b47 | 267 | * the allocation btrees: 2 trees * (max depth - 1) * block size |
025101dc | 268 | */ |
8f794055 | 269 | STATIC uint |
b8402b47 DC |
270 | xfs_calc_create_resv_alloc( |
271 | struct xfs_mount *mp) | |
272 | { | |
273 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
274 | mp->m_sb.sb_sectsize + | |
275 | xfs_calc_buf_res(XFS_IALLOC_BLOCKS(mp), XFS_FSB_TO_B(mp, 1)) + | |
276 | xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + | |
277 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
278 | XFS_FSB_TO_B(mp, 1)); | |
279 | } | |
280 | ||
281 | STATIC uint | |
282 | __xfs_calc_create_reservation( | |
025101dc | 283 | struct xfs_mount *mp) |
8f794055 | 284 | { |
025101dc | 285 | return XFS_DQUOT_LOGRES(mp) + |
b8402b47 DC |
286 | MAX(xfs_calc_create_resv_alloc(mp), |
287 | xfs_calc_create_resv_modify(mp)); | |
8f794055 NS |
288 | } |
289 | ||
025101dc | 290 | /* |
b8402b47 | 291 | * For icreate we can allocate some inodes giving: |
025101dc CH |
292 | * the agi and agf of the ag getting the new inodes: 2 * sectorsize |
293 | * the superblock for the nlink flag: sector size | |
025101dc CH |
294 | * the inode btree: max depth * blocksize |
295 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
296 | */ | |
8f794055 | 297 | STATIC uint |
b8402b47 | 298 | xfs_calc_icreate_resv_alloc( |
025101dc | 299 | struct xfs_mount *mp) |
b8402b47 DC |
300 | { |
301 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
302 | mp->m_sb.sb_sectsize + | |
303 | xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + | |
304 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
305 | XFS_FSB_TO_B(mp, 1)); | |
306 | } | |
307 | ||
308 | STATIC uint | |
309 | xfs_calc_icreate_reservation(xfs_mount_t *mp) | |
8f794055 | 310 | { |
025101dc | 311 | return XFS_DQUOT_LOGRES(mp) + |
b8402b47 DC |
312 | MAX(xfs_calc_icreate_resv_alloc(mp), |
313 | xfs_calc_create_resv_modify(mp)); | |
314 | } | |
315 | ||
316 | STATIC uint | |
317 | xfs_calc_create_reservation( | |
318 | struct xfs_mount *mp) | |
319 | { | |
320 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
321 | return xfs_calc_icreate_reservation(mp); | |
322 | return __xfs_calc_create_reservation(mp); | |
323 | ||
8f794055 NS |
324 | } |
325 | ||
025101dc CH |
326 | /* |
327 | * Making a new directory is the same as creating a new file. | |
328 | */ | |
8f794055 | 329 | STATIC uint |
025101dc CH |
330 | xfs_calc_mkdir_reservation( |
331 | struct xfs_mount *mp) | |
8f794055 | 332 | { |
025101dc | 333 | return xfs_calc_create_reservation(mp); |
8f794055 NS |
334 | } |
335 | ||
b8402b47 DC |
336 | |
337 | /* | |
338 | * Making a new symplink is the same as creating a new file, but | |
339 | * with the added blocks for remote symlink data which can be up to 1kB in | |
340 | * length (MAXPATHLEN). | |
341 | */ | |
342 | STATIC uint | |
343 | xfs_calc_symlink_reservation( | |
344 | struct xfs_mount *mp) | |
345 | { | |
346 | return xfs_calc_create_reservation(mp) + | |
347 | xfs_calc_buf_res(1, MAXPATHLEN); | |
348 | } | |
349 | ||
025101dc CH |
350 | /* |
351 | * In freeing an inode we can modify: | |
352 | * the inode being freed: inode size | |
353 | * the super block free inode counter: sector size | |
354 | * the agi hash list and counters: sector size | |
355 | * the inode btree entry: block size | |
356 | * the on disk inode before ours in the agi hash list: inode cluster size | |
357 | * the inode btree: max depth * blocksize | |
358 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
359 | */ | |
8f794055 | 360 | STATIC uint |
025101dc CH |
361 | xfs_calc_ifree_reservation( |
362 | struct xfs_mount *mp) | |
8f794055 | 363 | { |
025101dc | 364 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
365 | xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
366 | xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
367 | xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) + | |
025101dc CH |
368 | MAX((__uint16_t)XFS_FSB_TO_B(mp, 1), |
369 | XFS_INODE_CLUSTER_SIZE(mp)) + | |
5b292ae3 JL |
370 | xfs_calc_buf_res(1, 0) + |
371 | xfs_calc_buf_res(2 + XFS_IALLOC_BLOCKS(mp) + | |
372 | mp->m_in_maxlevels, 0) + | |
373 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
374 | XFS_FSB_TO_B(mp, 1)); | |
8f794055 NS |
375 | } |
376 | ||
025101dc CH |
377 | /* |
378 | * When only changing the inode we log the inode and possibly the superblock | |
379 | * We also add a bit of slop for the transaction stuff. | |
380 | */ | |
8f794055 | 381 | STATIC uint |
025101dc CH |
382 | xfs_calc_ichange_reservation( |
383 | struct xfs_mount *mp) | |
8f794055 | 384 | { |
025101dc CH |
385 | return XFS_DQUOT_LOGRES(mp) + |
386 | mp->m_sb.sb_inodesize + | |
387 | mp->m_sb.sb_sectsize + | |
388 | 512; | |
389 | ||
8f794055 NS |
390 | } |
391 | ||
025101dc CH |
392 | /* |
393 | * Growing the data section of the filesystem. | |
394 | * superblock | |
395 | * agi and agf | |
396 | * allocation btrees | |
397 | */ | |
8f794055 | 398 | STATIC uint |
025101dc CH |
399 | xfs_calc_growdata_reservation( |
400 | struct xfs_mount *mp) | |
8f794055 | 401 | { |
5b292ae3 JL |
402 | return xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
403 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
404 | XFS_FSB_TO_B(mp, 1)); | |
8f794055 NS |
405 | } |
406 | ||
025101dc CH |
407 | /* |
408 | * Growing the rt section of the filesystem. | |
409 | * In the first set of transactions (ALLOC) we allocate space to the | |
410 | * bitmap or summary files. | |
411 | * superblock: sector size | |
412 | * agf of the ag from which the extent is allocated: sector size | |
413 | * bmap btree for bitmap/summary inode: max depth * blocksize | |
414 | * bitmap/summary inode: inode size | |
415 | * allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize | |
416 | */ | |
8f794055 | 417 | STATIC uint |
025101dc CH |
418 | xfs_calc_growrtalloc_reservation( |
419 | struct xfs_mount *mp) | |
8f794055 | 420 | { |
5b292ae3 JL |
421 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + |
422 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), | |
423 | XFS_FSB_TO_B(mp, 1)) + | |
424 | xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + | |
425 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
426 | XFS_FSB_TO_B(mp, 1)); | |
8f794055 NS |
427 | } |
428 | ||
025101dc CH |
429 | /* |
430 | * Growing the rt section of the filesystem. | |
431 | * In the second set of transactions (ZERO) we zero the new metadata blocks. | |
432 | * one bitmap/summary block: blocksize | |
433 | */ | |
8f794055 | 434 | STATIC uint |
025101dc CH |
435 | xfs_calc_growrtzero_reservation( |
436 | struct xfs_mount *mp) | |
8f794055 | 437 | { |
5b292ae3 | 438 | return xfs_calc_buf_res(1, mp->m_sb.sb_blocksize); |
8f794055 NS |
439 | } |
440 | ||
025101dc CH |
441 | /* |
442 | * Growing the rt section of the filesystem. | |
443 | * In the third set of transactions (FREE) we update metadata without | |
444 | * allocating any new blocks. | |
445 | * superblock: sector size | |
446 | * bitmap inode: inode size | |
447 | * summary inode: inode size | |
448 | * one bitmap block: blocksize | |
449 | * summary blocks: new summary size | |
450 | */ | |
8f794055 | 451 | STATIC uint |
025101dc CH |
452 | xfs_calc_growrtfree_reservation( |
453 | struct xfs_mount *mp) | |
8f794055 | 454 | { |
5b292ae3 JL |
455 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
456 | xfs_calc_buf_res(2, mp->m_sb.sb_inodesize) + | |
457 | xfs_calc_buf_res(1, mp->m_sb.sb_blocksize) + | |
458 | xfs_calc_buf_res(1, mp->m_rsumsize); | |
8f794055 NS |
459 | } |
460 | ||
025101dc CH |
461 | /* |
462 | * Logging the inode modification timestamp on a synchronous write. | |
463 | * inode | |
464 | */ | |
8f794055 | 465 | STATIC uint |
025101dc CH |
466 | xfs_calc_swrite_reservation( |
467 | struct xfs_mount *mp) | |
8f794055 | 468 | { |
5b292ae3 | 469 | return xfs_calc_buf_res(1, mp->m_sb.sb_inodesize); |
8f794055 NS |
470 | } |
471 | ||
025101dc CH |
472 | /* |
473 | * Logging the inode mode bits when writing a setuid/setgid file | |
474 | * inode | |
475 | */ | |
8f794055 NS |
476 | STATIC uint |
477 | xfs_calc_writeid_reservation(xfs_mount_t *mp) | |
478 | { | |
5b292ae3 | 479 | return xfs_calc_buf_res(1, mp->m_sb.sb_inodesize); |
8f794055 NS |
480 | } |
481 | ||
025101dc CH |
482 | /* |
483 | * Converting the inode from non-attributed to attributed. | |
484 | * the inode being converted: inode size | |
485 | * agf block and superblock (for block allocation) | |
486 | * the new block (directory sized) | |
487 | * bmap blocks for the new directory block | |
488 | * allocation btrees | |
489 | */ | |
8f794055 | 490 | STATIC uint |
025101dc CH |
491 | xfs_calc_addafork_reservation( |
492 | struct xfs_mount *mp) | |
8f794055 | 493 | { |
025101dc | 494 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
495 | xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
496 | xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
497 | xfs_calc_buf_res(1, mp->m_dirblksize) + | |
498 | xfs_calc_buf_res(XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1, | |
499 | XFS_FSB_TO_B(mp, 1)) + | |
500 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
501 | XFS_FSB_TO_B(mp, 1)); | |
8f794055 NS |
502 | } |
503 | ||
025101dc CH |
504 | /* |
505 | * Removing the attribute fork of a file | |
506 | * the inode being truncated: inode size | |
507 | * the inode's bmap btree: max depth * block size | |
508 | * And the bmap_finish transaction can free the blocks and bmap blocks: | |
509 | * the agf for each of the ags: 4 * sector size | |
510 | * the agfl for each of the ags: 4 * sector size | |
511 | * the super block to reflect the freed blocks: sector size | |
512 | * worst case split in allocation btrees per extent assuming 4 extents: | |
513 | * 4 exts * 2 trees * (2 * max depth - 1) * block size | |
514 | */ | |
8f794055 | 515 | STATIC uint |
025101dc CH |
516 | xfs_calc_attrinval_reservation( |
517 | struct xfs_mount *mp) | |
8f794055 | 518 | { |
5b292ae3 JL |
519 | return MAX((xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
520 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), | |
521 | XFS_FSB_TO_B(mp, 1))), | |
522 | (xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + | |
523 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 4), | |
524 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
525 | } |
526 | ||
025101dc | 527 | /* |
a21cd503 | 528 | * Setting an attribute at mount time. |
025101dc CH |
529 | * the inode getting the attribute |
530 | * the superblock for allocations | |
531 | * the agfs extents are allocated from | |
532 | * the attribute btree * max depth | |
533 | * the inode allocation btree | |
534 | * Since attribute transaction space is dependent on the size of the attribute, | |
a21cd503 JL |
535 | * the calculation is done partially at mount time and partially at runtime(see |
536 | * below). | |
025101dc | 537 | */ |
8f794055 | 538 | STATIC uint |
a21cd503 | 539 | xfs_calc_attrsetm_reservation( |
025101dc | 540 | struct xfs_mount *mp) |
8f794055 | 541 | { |
025101dc | 542 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
543 | xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
544 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
545 | xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, XFS_FSB_TO_B(mp, 1)); | |
8f794055 NS |
546 | } |
547 | ||
a21cd503 JL |
548 | /* |
549 | * Setting an attribute at runtime, transaction space unit per block. | |
550 | * the superblock for allocations: sector size | |
551 | * the inode bmap btree could join or split: max depth * block size | |
552 | * Since the runtime attribute transaction space is dependent on the total | |
553 | * blocks needed for the 1st bmap, here we calculate out the space unit for | |
554 | * one block so that the caller could figure out the total space according | |
555 | * to the attibute extent length in blocks by: ext * XFS_ATTRSETRT_LOG_RES(mp). | |
556 | */ | |
557 | STATIC uint | |
558 | xfs_calc_attrsetrt_reservation( | |
559 | struct xfs_mount *mp) | |
560 | { | |
561 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
562 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), | |
563 | XFS_FSB_TO_B(mp, 1)); | |
564 | } | |
565 | ||
025101dc CH |
566 | /* |
567 | * Removing an attribute. | |
568 | * the inode: inode size | |
569 | * the attribute btree could join: max depth * block size | |
570 | * the inode bmap btree could join or split: max depth * block size | |
571 | * And the bmap_finish transaction can free the attr blocks freed giving: | |
572 | * the agf for the ag in which the blocks live: 2 * sector size | |
573 | * the agfl for the ag in which the blocks live: 2 * sector size | |
574 | * the superblock for the free block count: sector size | |
575 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
576 | */ | |
8f794055 | 577 | STATIC uint |
025101dc CH |
578 | xfs_calc_attrrm_reservation( |
579 | struct xfs_mount *mp) | |
8f794055 | 580 | { |
025101dc | 581 | return XFS_DQUOT_LOGRES(mp) + |
5b292ae3 JL |
582 | MAX((xfs_calc_buf_res(1, mp->m_sb.sb_inodesize) + |
583 | xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, | |
584 | XFS_FSB_TO_B(mp, 1)) + | |
585 | (uint)XFS_FSB_TO_B(mp, | |
586 | XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + | |
587 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), 0)), | |
588 | (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + | |
589 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
590 | XFS_FSB_TO_B(mp, 1)))); | |
8f794055 NS |
591 | } |
592 | ||
025101dc CH |
593 | /* |
594 | * Clearing a bad agino number in an agi hash bucket. | |
595 | */ | |
8f794055 | 596 | STATIC uint |
025101dc CH |
597 | xfs_calc_clear_agi_bucket_reservation( |
598 | struct xfs_mount *mp) | |
8f794055 | 599 | { |
5b292ae3 | 600 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); |
8f794055 NS |
601 | } |
602 | ||
b0c10b98 JL |
603 | /* |
604 | * Clearing the quotaflags in the superblock. | |
605 | * the super block for changing quota flags: sector size | |
606 | */ | |
607 | STATIC uint | |
608 | xfs_calc_qm_sbchange_reservation( | |
609 | struct xfs_mount *mp) | |
610 | { | |
611 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
612 | } | |
613 | ||
f0f2df94 JL |
614 | /* |
615 | * Adjusting quota limits. | |
616 | * the xfs_disk_dquot_t: sizeof(struct xfs_disk_dquot) | |
617 | */ | |
618 | STATIC uint | |
619 | xfs_calc_qm_setqlim_reservation( | |
620 | struct xfs_mount *mp) | |
621 | { | |
622 | return xfs_calc_buf_res(1, sizeof(struct xfs_disk_dquot)); | |
623 | } | |
624 | ||
48001044 JL |
625 | /* |
626 | * Allocating quota on disk if needed. | |
627 | * the write transaction log space: XFS_WRITE_LOG_RES(mp) | |
628 | * the unit of quota allocation: one system block size | |
629 | */ | |
630 | STATIC uint | |
631 | xfs_calc_qm_dqalloc_reservation( | |
632 | struct xfs_mount *mp) | |
633 | { | |
634 | return XFS_WRITE_LOG_RES(mp) + | |
635 | xfs_calc_buf_res(1, | |
636 | XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1); | |
637 | } | |
638 | ||
a1bd9557 JL |
639 | /* |
640 | * Turning off quotas. | |
641 | * the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2 | |
642 | * the superblock for the quota flags: sector size | |
643 | */ | |
644 | STATIC uint | |
645 | xfs_calc_qm_quotaoff_reservation( | |
646 | struct xfs_mount *mp) | |
647 | { | |
648 | return sizeof(struct xfs_qoff_logitem) * 2 + | |
649 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
650 | } | |
651 | ||
762d7ba6 JL |
652 | /* |
653 | * End of turning off quotas. | |
654 | * the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2 | |
655 | */ | |
656 | STATIC uint | |
657 | xfs_calc_qm_quotaoff_end_reservation( | |
658 | struct xfs_mount *mp) | |
659 | { | |
660 | return sizeof(struct xfs_qoff_logitem) * 2; | |
661 | } | |
662 | ||
a7bd794a JL |
663 | /* |
664 | * Syncing the incore super block changes to disk. | |
665 | * the super block to reflect the changes: sector size | |
666 | */ | |
667 | STATIC uint | |
668 | xfs_calc_sb_reservation( | |
669 | struct xfs_mount *mp) | |
670 | { | |
671 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
672 | } | |
673 | ||
1da177e4 LT |
674 | /* |
675 | * Initialize the precomputed transaction reservation values | |
676 | * in the mount structure. | |
677 | */ | |
678 | void | |
679 | xfs_trans_init( | |
025101dc | 680 | struct xfs_mount *mp) |
1da177e4 | 681 | { |
025101dc | 682 | struct xfs_trans_reservations *resp = &mp->m_reservations; |
1da177e4 | 683 | |
8f794055 NS |
684 | resp->tr_write = xfs_calc_write_reservation(mp); |
685 | resp->tr_itruncate = xfs_calc_itruncate_reservation(mp); | |
686 | resp->tr_rename = xfs_calc_rename_reservation(mp); | |
687 | resp->tr_link = xfs_calc_link_reservation(mp); | |
688 | resp->tr_remove = xfs_calc_remove_reservation(mp); | |
689 | resp->tr_symlink = xfs_calc_symlink_reservation(mp); | |
690 | resp->tr_create = xfs_calc_create_reservation(mp); | |
691 | resp->tr_mkdir = xfs_calc_mkdir_reservation(mp); | |
692 | resp->tr_ifree = xfs_calc_ifree_reservation(mp); | |
693 | resp->tr_ichange = xfs_calc_ichange_reservation(mp); | |
694 | resp->tr_growdata = xfs_calc_growdata_reservation(mp); | |
695 | resp->tr_swrite = xfs_calc_swrite_reservation(mp); | |
696 | resp->tr_writeid = xfs_calc_writeid_reservation(mp); | |
697 | resp->tr_addafork = xfs_calc_addafork_reservation(mp); | |
698 | resp->tr_attrinval = xfs_calc_attrinval_reservation(mp); | |
a21cd503 JL |
699 | resp->tr_attrsetm = xfs_calc_attrsetm_reservation(mp); |
700 | resp->tr_attrsetrt = xfs_calc_attrsetrt_reservation(mp); | |
8f794055 NS |
701 | resp->tr_attrrm = xfs_calc_attrrm_reservation(mp); |
702 | resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp); | |
703 | resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp); | |
704 | resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp); | |
705 | resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp); | |
b0c10b98 | 706 | resp->tr_qm_sbchange = xfs_calc_qm_sbchange_reservation(mp); |
f0f2df94 | 707 | resp->tr_qm_setqlim = xfs_calc_qm_setqlim_reservation(mp); |
48001044 | 708 | resp->tr_qm_dqalloc = xfs_calc_qm_dqalloc_reservation(mp); |
a1bd9557 | 709 | resp->tr_qm_quotaoff = xfs_calc_qm_quotaoff_reservation(mp); |
762d7ba6 | 710 | resp->tr_qm_equotaoff = xfs_calc_qm_quotaoff_end_reservation(mp); |
a7bd794a | 711 | resp->tr_sb = xfs_calc_sb_reservation(mp); |
1da177e4 LT |
712 | } |
713 | ||
714 | /* | |
715 | * This routine is called to allocate a transaction structure. | |
716 | * The type parameter indicates the type of the transaction. These | |
717 | * are enumerated in xfs_trans.h. | |
b2ce3974 AE |
718 | * |
719 | * Dynamically allocate the transaction structure from the transaction | |
720 | * zone, initialize it, and return it to the caller. | |
1da177e4 | 721 | */ |
b2ce3974 AE |
722 | xfs_trans_t * |
723 | xfs_trans_alloc( | |
724 | xfs_mount_t *mp, | |
725 | uint type) | |
726 | { | |
d9457dc0 JK |
727 | xfs_trans_t *tp; |
728 | ||
729 | sb_start_intwrite(mp->m_super); | |
730 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); | |
731 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; | |
732 | return tp; | |
b2ce3974 AE |
733 | } |
734 | ||
735 | xfs_trans_t * | |
1da177e4 | 736 | _xfs_trans_alloc( |
b2ce3974 AE |
737 | xfs_mount_t *mp, |
738 | uint type, | |
77ba7877 | 739 | xfs_km_flags_t memflags) |
1da177e4 | 740 | { |
b2ce3974 | 741 | xfs_trans_t *tp; |
1da177e4 | 742 | |
d9457dc0 | 743 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
34327e13 | 744 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 745 | |
80641dc6 | 746 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
1da177e4 LT |
747 | tp->t_magic = XFS_TRANS_MAGIC; |
748 | tp->t_type = type; | |
749 | tp->t_mountp = mp; | |
e98c414f | 750 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 751 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 752 | return tp; |
1da177e4 LT |
753 | } |
754 | ||
b1c1b5b6 DC |
755 | /* |
756 | * Free the transaction structure. If there is more clean up | |
757 | * to do when the structure is freed, add it here. | |
758 | */ | |
759 | STATIC void | |
760 | xfs_trans_free( | |
ed3b4d6c | 761 | struct xfs_trans *tp) |
b1c1b5b6 | 762 | { |
4ecbfe63 DC |
763 | xfs_extent_busy_sort(&tp->t_busy); |
764 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 765 | |
b1c1b5b6 | 766 | atomic_dec(&tp->t_mountp->m_active_trans); |
d9457dc0 JK |
767 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
768 | sb_end_intwrite(tp->t_mountp->m_super); | |
b1c1b5b6 DC |
769 | xfs_trans_free_dqinfo(tp); |
770 | kmem_zone_free(xfs_trans_zone, tp); | |
771 | } | |
772 | ||
1da177e4 LT |
773 | /* |
774 | * This is called to create a new transaction which will share the | |
775 | * permanent log reservation of the given transaction. The remaining | |
776 | * unused block and rt extent reservations are also inherited. This | |
777 | * implies that the original transaction is no longer allowed to allocate | |
778 | * blocks. Locks and log items, however, are no inherited. They must | |
779 | * be added to the new transaction explicitly. | |
780 | */ | |
781 | xfs_trans_t * | |
782 | xfs_trans_dup( | |
783 | xfs_trans_t *tp) | |
784 | { | |
785 | xfs_trans_t *ntp; | |
786 | ||
787 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
788 | ||
789 | /* | |
790 | * Initialize the new transaction structure. | |
791 | */ | |
792 | ntp->t_magic = XFS_TRANS_MAGIC; | |
793 | ntp->t_type = tp->t_type; | |
794 | ntp->t_mountp = tp->t_mountp; | |
e98c414f | 795 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 796 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
797 | |
798 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 799 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 800 | |
d9457dc0 JK |
801 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
802 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
803 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); | |
804 | /* We gave our writer reference to the new transaction */ | |
805 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; | |
cc09c0dc | 806 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
807 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
808 | tp->t_blk_res = tp->t_blk_res_used; | |
809 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
810 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 811 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 812 | |
7d095257 | 813 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
814 | |
815 | atomic_inc(&tp->t_mountp->m_active_trans); | |
816 | return ntp; | |
817 | } | |
818 | ||
819 | /* | |
820 | * This is called to reserve free disk blocks and log space for the | |
821 | * given transaction. This must be done before allocating any resources | |
822 | * within the transaction. | |
823 | * | |
824 | * This will return ENOSPC if there are not enough blocks available. | |
825 | * It will sleep waiting for available log space. | |
826 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
827 | * is used by long running transactions. If any one of the reservations | |
828 | * fails then they will all be backed out. | |
829 | * | |
830 | * This does not do quota reservations. That typically is done by the | |
831 | * caller afterwards. | |
832 | */ | |
833 | int | |
834 | xfs_trans_reserve( | |
835 | xfs_trans_t *tp, | |
836 | uint blocks, | |
837 | uint logspace, | |
838 | uint rtextents, | |
839 | uint flags, | |
840 | uint logcount) | |
841 | { | |
59c1b082 NS |
842 | int error = 0; |
843 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
844 | |
845 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 846 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
847 | |
848 | /* | |
849 | * Attempt to reserve the needed disk blocks by decrementing | |
850 | * the number needed from the number available. This will | |
851 | * fail if the count would go below zero. | |
852 | */ | |
853 | if (blocks > 0) { | |
96540c78 | 854 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 855 | -((int64_t)blocks), rsvd); |
1da177e4 | 856 | if (error != 0) { |
59c1b082 | 857 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
858 | return (XFS_ERROR(ENOSPC)); |
859 | } | |
860 | tp->t_blk_res += blocks; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Reserve the log space needed for this transaction. | |
865 | */ | |
866 | if (logspace > 0) { | |
9006fb91 CH |
867 | bool permanent = false; |
868 | ||
869 | ASSERT(tp->t_log_res == 0 || tp->t_log_res == logspace); | |
870 | ASSERT(tp->t_log_count == 0 || tp->t_log_count == logcount); | |
871 | ||
1da177e4 | 872 | if (flags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 873 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 874 | permanent = true; |
1da177e4 LT |
875 | } else { |
876 | ASSERT(tp->t_ticket == NULL); | |
877 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
878 | } |
879 | ||
9006fb91 CH |
880 | if (tp->t_ticket != NULL) { |
881 | ASSERT(flags & XFS_TRANS_PERM_LOG_RES); | |
882 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); | |
883 | } else { | |
884 | error = xfs_log_reserve(tp->t_mountp, logspace, | |
885 | logcount, &tp->t_ticket, | |
886 | XFS_TRANSACTION, permanent, | |
887 | tp->t_type); | |
1da177e4 | 888 | } |
9006fb91 CH |
889 | |
890 | if (error) | |
891 | goto undo_blocks; | |
892 | ||
1da177e4 LT |
893 | tp->t_log_res = logspace; |
894 | tp->t_log_count = logcount; | |
895 | } | |
896 | ||
897 | /* | |
898 | * Attempt to reserve the needed realtime extents by decrementing | |
899 | * the number needed from the number available. This will | |
900 | * fail if the count would go below zero. | |
901 | */ | |
902 | if (rtextents > 0) { | |
903 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 904 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
905 | if (error) { |
906 | error = XFS_ERROR(ENOSPC); | |
907 | goto undo_log; | |
908 | } | |
909 | tp->t_rtx_res += rtextents; | |
910 | } | |
911 | ||
912 | return 0; | |
913 | ||
914 | /* | |
915 | * Error cases jump to one of these labels to undo any | |
916 | * reservations which have already been performed. | |
917 | */ | |
918 | undo_log: | |
919 | if (logspace > 0) { | |
9006fb91 CH |
920 | int log_flags; |
921 | ||
1da177e4 LT |
922 | if (flags & XFS_TRANS_PERM_LOG_RES) { |
923 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
924 | } else { | |
925 | log_flags = 0; | |
926 | } | |
927 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
928 | tp->t_ticket = NULL; | |
929 | tp->t_log_res = 0; | |
930 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
931 | } | |
932 | ||
933 | undo_blocks: | |
934 | if (blocks > 0) { | |
96540c78 | 935 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 936 | (int64_t)blocks, rsvd); |
1da177e4 LT |
937 | tp->t_blk_res = 0; |
938 | } | |
939 | ||
59c1b082 | 940 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 941 | |
59c1b082 | 942 | return error; |
1da177e4 LT |
943 | } |
944 | ||
1da177e4 LT |
945 | /* |
946 | * Record the indicated change to the given field for application | |
947 | * to the file system's superblock when the transaction commits. | |
948 | * For now, just store the change in the transaction structure. | |
949 | * | |
950 | * Mark the transaction structure to indicate that the superblock | |
951 | * needs to be updated before committing. | |
92821e2b DC |
952 | * |
953 | * Because we may not be keeping track of allocated/free inodes and | |
954 | * used filesystem blocks in the superblock, we do not mark the | |
955 | * superblock dirty in this transaction if we modify these fields. | |
956 | * We still need to update the transaction deltas so that they get | |
957 | * applied to the incore superblock, but we don't want them to | |
958 | * cause the superblock to get locked and logged if these are the | |
959 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
960 | */ |
961 | void | |
962 | xfs_trans_mod_sb( | |
963 | xfs_trans_t *tp, | |
964 | uint field, | |
20f4ebf2 | 965 | int64_t delta) |
1da177e4 | 966 | { |
92821e2b DC |
967 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
968 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
969 | |
970 | switch (field) { | |
971 | case XFS_TRANS_SB_ICOUNT: | |
972 | tp->t_icount_delta += delta; | |
92821e2b DC |
973 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
974 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
975 | break; |
976 | case XFS_TRANS_SB_IFREE: | |
977 | tp->t_ifree_delta += delta; | |
92821e2b DC |
978 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
979 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
980 | break; |
981 | case XFS_TRANS_SB_FDBLOCKS: | |
982 | /* | |
983 | * Track the number of blocks allocated in the | |
984 | * transaction. Make sure it does not exceed the | |
985 | * number reserved. | |
986 | */ | |
987 | if (delta < 0) { | |
988 | tp->t_blk_res_used += (uint)-delta; | |
989 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
990 | } | |
991 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
992 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
993 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
994 | break; |
995 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
996 | /* | |
997 | * The allocation has already been applied to the | |
998 | * in-core superblock's counter. This should only | |
999 | * be applied to the on-disk superblock. | |
1000 | */ | |
1001 | ASSERT(delta < 0); | |
1002 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
1003 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
1004 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
1005 | break; |
1006 | case XFS_TRANS_SB_FREXTENTS: | |
1007 | /* | |
1008 | * Track the number of blocks allocated in the | |
1009 | * transaction. Make sure it does not exceed the | |
1010 | * number reserved. | |
1011 | */ | |
1012 | if (delta < 0) { | |
1013 | tp->t_rtx_res_used += (uint)-delta; | |
1014 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
1015 | } | |
1016 | tp->t_frextents_delta += delta; | |
1017 | break; | |
1018 | case XFS_TRANS_SB_RES_FREXTENTS: | |
1019 | /* | |
1020 | * The allocation has already been applied to the | |
c41564b5 | 1021 | * in-core superblock's counter. This should only |
1da177e4 LT |
1022 | * be applied to the on-disk superblock. |
1023 | */ | |
1024 | ASSERT(delta < 0); | |
1025 | tp->t_res_frextents_delta += delta; | |
1026 | break; | |
1027 | case XFS_TRANS_SB_DBLOCKS: | |
1028 | ASSERT(delta > 0); | |
1029 | tp->t_dblocks_delta += delta; | |
1030 | break; | |
1031 | case XFS_TRANS_SB_AGCOUNT: | |
1032 | ASSERT(delta > 0); | |
1033 | tp->t_agcount_delta += delta; | |
1034 | break; | |
1035 | case XFS_TRANS_SB_IMAXPCT: | |
1036 | tp->t_imaxpct_delta += delta; | |
1037 | break; | |
1038 | case XFS_TRANS_SB_REXTSIZE: | |
1039 | tp->t_rextsize_delta += delta; | |
1040 | break; | |
1041 | case XFS_TRANS_SB_RBMBLOCKS: | |
1042 | tp->t_rbmblocks_delta += delta; | |
1043 | break; | |
1044 | case XFS_TRANS_SB_RBLOCKS: | |
1045 | tp->t_rblocks_delta += delta; | |
1046 | break; | |
1047 | case XFS_TRANS_SB_REXTENTS: | |
1048 | tp->t_rextents_delta += delta; | |
1049 | break; | |
1050 | case XFS_TRANS_SB_REXTSLOG: | |
1051 | tp->t_rextslog_delta += delta; | |
1052 | break; | |
1053 | default: | |
1054 | ASSERT(0); | |
1055 | return; | |
1056 | } | |
1057 | ||
210c6f1c | 1058 | tp->t_flags |= flags; |
1da177e4 LT |
1059 | } |
1060 | ||
1061 | /* | |
1062 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
1063 | * to bring the superblock buffer into the current transaction | |
1064 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
1065 | * | |
1066 | * For now we just look at each field allowed to change and change | |
1067 | * it if necessary. | |
1068 | */ | |
1069 | STATIC void | |
1070 | xfs_trans_apply_sb_deltas( | |
1071 | xfs_trans_t *tp) | |
1072 | { | |
2bdf7cd0 | 1073 | xfs_dsb_t *sbp; |
1da177e4 LT |
1074 | xfs_buf_t *bp; |
1075 | int whole = 0; | |
1076 | ||
1077 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
1078 | sbp = XFS_BUF_TO_SBP(bp); | |
1079 | ||
1080 | /* | |
1081 | * Check that superblock mods match the mods made to AGF counters. | |
1082 | */ | |
1083 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
1084 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
1085 | tp->t_ag_btree_delta)); | |
1086 | ||
92821e2b DC |
1087 | /* |
1088 | * Only update the superblock counters if we are logging them | |
1089 | */ | |
1090 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 1091 | if (tp->t_icount_delta) |
413d57c9 | 1092 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 1093 | if (tp->t_ifree_delta) |
413d57c9 | 1094 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 1095 | if (tp->t_fdblocks_delta) |
413d57c9 | 1096 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 1097 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 1098 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
1099 | } |
1100 | ||
2bdf7cd0 | 1101 | if (tp->t_frextents_delta) |
413d57c9 | 1102 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 1103 | if (tp->t_res_frextents_delta) |
413d57c9 | 1104 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
1105 | |
1106 | if (tp->t_dblocks_delta) { | |
413d57c9 | 1107 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
1108 | whole = 1; |
1109 | } | |
2bdf7cd0 | 1110 | if (tp->t_agcount_delta) { |
413d57c9 | 1111 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
1112 | whole = 1; |
1113 | } | |
2bdf7cd0 CH |
1114 | if (tp->t_imaxpct_delta) { |
1115 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
1116 | whole = 1; |
1117 | } | |
2bdf7cd0 | 1118 | if (tp->t_rextsize_delta) { |
413d57c9 | 1119 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
1120 | whole = 1; |
1121 | } | |
2bdf7cd0 | 1122 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 1123 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
1124 | whole = 1; |
1125 | } | |
2bdf7cd0 | 1126 | if (tp->t_rblocks_delta) { |
413d57c9 | 1127 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
1128 | whole = 1; |
1129 | } | |
2bdf7cd0 | 1130 | if (tp->t_rextents_delta) { |
413d57c9 | 1131 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
1132 | whole = 1; |
1133 | } | |
2bdf7cd0 CH |
1134 | if (tp->t_rextslog_delta) { |
1135 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
1136 | whole = 1; |
1137 | } | |
1138 | ||
1139 | if (whole) | |
1140 | /* | |
c41564b5 | 1141 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 1142 | */ |
2bdf7cd0 | 1143 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
1144 | else |
1145 | /* | |
1146 | * Since all the modifiable fields are contiguous, we | |
1147 | * can get away with this. | |
1148 | */ | |
2bdf7cd0 CH |
1149 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
1150 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 1151 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
1152 | } |
1153 | ||
1154 | /* | |
45c34141 DC |
1155 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
1156 | * and apply superblock counter changes to the in-core superblock. The | |
1157 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
1158 | * applied to the in-core superblock. The idea is that that has already been | |
1159 | * done. | |
1da177e4 LT |
1160 | * |
1161 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
1162 | * However, we have to ensure that we only modify each superblock field only |
1163 | * once because the application of the delta values may not be atomic. That can | |
1164 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
1165 | * free space counter to put back the entire reservation and then take away | |
1166 | * what we used. | |
1167 | * | |
1168 | * If we are not logging superblock counters, then the inode allocated/free and | |
1169 | * used block counts are not updated in the on disk superblock. In this case, | |
1170 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
1171 | * still need to update the incore superblock with the changes. | |
1da177e4 | 1172 | */ |
71e330b5 | 1173 | void |
1da177e4 LT |
1174 | xfs_trans_unreserve_and_mod_sb( |
1175 | xfs_trans_t *tp) | |
1176 | { | |
1b040712 | 1177 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 1178 | xfs_mod_sb_t *msbp; |
92821e2b | 1179 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1180 | /* REFERENCED */ |
1181 | int error; | |
1182 | int rsvd; | |
45c34141 DC |
1183 | int64_t blkdelta = 0; |
1184 | int64_t rtxdelta = 0; | |
1b040712 CH |
1185 | int64_t idelta = 0; |
1186 | int64_t ifreedelta = 0; | |
1da177e4 LT |
1187 | |
1188 | msbp = msb; | |
1189 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1190 | ||
1b040712 | 1191 | /* calculate deltas */ |
45c34141 DC |
1192 | if (tp->t_blk_res > 0) |
1193 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
1194 | if ((tp->t_fdblocks_delta != 0) && |
1195 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
1196 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
1197 | blkdelta += tp->t_fdblocks_delta; | |
1198 | ||
45c34141 DC |
1199 | if (tp->t_rtx_res > 0) |
1200 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
1201 | if ((tp->t_frextents_delta != 0) && |
1202 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
1203 | rtxdelta += tp->t_frextents_delta; | |
1204 | ||
1b040712 CH |
1205 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
1206 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
1207 | idelta = tp->t_icount_delta; | |
1208 | ifreedelta = tp->t_ifree_delta; | |
1209 | } | |
1210 | ||
1211 | /* apply the per-cpu counters */ | |
1212 | if (blkdelta) { | |
1213 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
1214 | blkdelta, rsvd); | |
1215 | if (error) | |
1216 | goto out; | |
1217 | } | |
1218 | ||
1219 | if (idelta) { | |
1220 | error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, | |
1221 | idelta, rsvd); | |
1222 | if (error) | |
1223 | goto out_undo_fdblocks; | |
1224 | } | |
1225 | ||
1226 | if (ifreedelta) { | |
1227 | error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, | |
1228 | ifreedelta, rsvd); | |
1229 | if (error) | |
1230 | goto out_undo_icount; | |
1231 | } | |
1232 | ||
1233 | /* apply remaining deltas */ | |
45c34141 | 1234 | if (rtxdelta != 0) { |
1da177e4 | 1235 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 1236 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
1237 | msbp++; |
1238 | } | |
1239 | ||
92821e2b | 1240 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
1241 | if (tp->t_dblocks_delta != 0) { |
1242 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 1243 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
1244 | msbp++; |
1245 | } | |
1246 | if (tp->t_agcount_delta != 0) { | |
1247 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 1248 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
1249 | msbp++; |
1250 | } | |
1251 | if (tp->t_imaxpct_delta != 0) { | |
1252 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 1253 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
1254 | msbp++; |
1255 | } | |
1256 | if (tp->t_rextsize_delta != 0) { | |
1257 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 1258 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
1259 | msbp++; |
1260 | } | |
1261 | if (tp->t_rbmblocks_delta != 0) { | |
1262 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 1263 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
1264 | msbp++; |
1265 | } | |
1266 | if (tp->t_rblocks_delta != 0) { | |
1267 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 1268 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
1269 | msbp++; |
1270 | } | |
1271 | if (tp->t_rextents_delta != 0) { | |
1272 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 1273 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
1274 | msbp++; |
1275 | } | |
1276 | if (tp->t_rextslog_delta != 0) { | |
1277 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 1278 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
1279 | msbp++; |
1280 | } | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * If we need to change anything, do it. | |
1285 | */ | |
1286 | if (msbp > msb) { | |
1287 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
1288 | (uint)(msbp - msb), rsvd); | |
1b040712 CH |
1289 | if (error) |
1290 | goto out_undo_ifreecount; | |
1da177e4 | 1291 | } |
1b040712 CH |
1292 | |
1293 | return; | |
1294 | ||
1295 | out_undo_ifreecount: | |
1296 | if (ifreedelta) | |
1297 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); | |
1298 | out_undo_icount: | |
1299 | if (idelta) | |
1300 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); | |
1301 | out_undo_fdblocks: | |
1302 | if (blkdelta) | |
1303 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); | |
1304 | out: | |
1884bd83 | 1305 | ASSERT(error == 0); |
1b040712 | 1306 | return; |
1da177e4 LT |
1307 | } |
1308 | ||
e98c414f CH |
1309 | /* |
1310 | * Add the given log item to the transaction's list of log items. | |
1311 | * | |
1312 | * The log item will now point to its new descriptor with its li_desc field. | |
1313 | */ | |
1314 | void | |
1315 | xfs_trans_add_item( | |
1316 | struct xfs_trans *tp, | |
1317 | struct xfs_log_item *lip) | |
1318 | { | |
1319 | struct xfs_log_item_desc *lidp; | |
1320 | ||
f65020a8 JJ |
1321 | ASSERT(lip->li_mountp == tp->t_mountp); |
1322 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 1323 | |
43869706 | 1324 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
1325 | |
1326 | lidp->lid_item = lip; | |
1327 | lidp->lid_flags = 0; | |
e98c414f CH |
1328 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
1329 | ||
1330 | lip->li_desc = lidp; | |
1331 | } | |
1332 | ||
1333 | STATIC void | |
1334 | xfs_trans_free_item_desc( | |
1335 | struct xfs_log_item_desc *lidp) | |
1336 | { | |
1337 | list_del_init(&lidp->lid_trans); | |
1338 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * Unlink and free the given descriptor. | |
1343 | */ | |
1344 | void | |
1345 | xfs_trans_del_item( | |
1346 | struct xfs_log_item *lip) | |
1347 | { | |
1348 | xfs_trans_free_item_desc(lip->li_desc); | |
1349 | lip->li_desc = NULL; | |
1350 | } | |
1351 | ||
1352 | /* | |
1353 | * Unlock all of the items of a transaction and free all the descriptors | |
1354 | * of that transaction. | |
1355 | */ | |
d17c701c | 1356 | void |
e98c414f CH |
1357 | xfs_trans_free_items( |
1358 | struct xfs_trans *tp, | |
1359 | xfs_lsn_t commit_lsn, | |
1360 | int flags) | |
1361 | { | |
1362 | struct xfs_log_item_desc *lidp, *next; | |
1363 | ||
1364 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
1365 | struct xfs_log_item *lip = lidp->lid_item; | |
1366 | ||
1367 | lip->li_desc = NULL; | |
1368 | ||
1369 | if (commit_lsn != NULLCOMMITLSN) | |
1370 | IOP_COMMITTING(lip, commit_lsn); | |
1371 | if (flags & XFS_TRANS_ABORT) | |
1372 | lip->li_flags |= XFS_LI_ABORTED; | |
1373 | IOP_UNLOCK(lip); | |
1374 | ||
1375 | xfs_trans_free_item_desc(lidp); | |
1376 | } | |
1377 | } | |
1378 | ||
0e57f6a3 DC |
1379 | static inline void |
1380 | xfs_log_item_batch_insert( | |
1381 | struct xfs_ail *ailp, | |
1d8c95a3 | 1382 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
1383 | struct xfs_log_item **log_items, |
1384 | int nr_items, | |
1385 | xfs_lsn_t commit_lsn) | |
1386 | { | |
1387 | int i; | |
1388 | ||
1389 | spin_lock(&ailp->xa_lock); | |
1390 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 1391 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 DC |
1392 | |
1393 | for (i = 0; i < nr_items; i++) | |
1394 | IOP_UNPIN(log_items[i], 0); | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
1399 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
1400 | * minimise lock traffic. | |
e34a314c DC |
1401 | * |
1402 | * If we are called with the aborted flag set, it is because a log write during | |
1403 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
1404 | * checkpoint have already gone through IOP_COMMITED and IOP_UNLOCK, which | |
1405 | * means that checkpoint commit abort handling is treated exactly the same | |
1406 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
1407 | * this case all we need to do is IOP_COMMITTED processing, followed by an | |
1408 | * IOP_UNPIN(aborted) call. | |
1d8c95a3 DC |
1409 | * |
1410 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
1411 | * at the end of the AIL, the insert cursor avoids the need to walk | |
1412 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
1413 | * call. This saves a lot of needless list walking and is a net win, even | |
1414 | * though it slightly increases that amount of AIL lock traffic to set it up | |
1415 | * and tear it down. | |
0e57f6a3 DC |
1416 | */ |
1417 | void | |
1418 | xfs_trans_committed_bulk( | |
1419 | struct xfs_ail *ailp, | |
1420 | struct xfs_log_vec *log_vector, | |
1421 | xfs_lsn_t commit_lsn, | |
1422 | int aborted) | |
1423 | { | |
1424 | #define LOG_ITEM_BATCH_SIZE 32 | |
1425 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
1426 | struct xfs_log_vec *lv; | |
1d8c95a3 | 1427 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
1428 | int i = 0; |
1429 | ||
1d8c95a3 DC |
1430 | spin_lock(&ailp->xa_lock); |
1431 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
1432 | spin_unlock(&ailp->xa_lock); | |
1433 | ||
0e57f6a3 DC |
1434 | /* unpin all the log items */ |
1435 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
1436 | struct xfs_log_item *lip = lv->lv_item; | |
1437 | xfs_lsn_t item_lsn; | |
1438 | ||
1439 | if (aborted) | |
1440 | lip->li_flags |= XFS_LI_ABORTED; | |
1441 | item_lsn = IOP_COMMITTED(lip, commit_lsn); | |
1442 | ||
1316d4da | 1443 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
1444 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
1445 | continue; | |
1446 | ||
e34a314c DC |
1447 | /* |
1448 | * if we are aborting the operation, no point in inserting the | |
1449 | * object into the AIL as we are in a shutdown situation. | |
1450 | */ | |
1451 | if (aborted) { | |
1452 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
1453 | IOP_UNPIN(lip, 1); | |
1454 | continue; | |
1455 | } | |
1456 | ||
0e57f6a3 DC |
1457 | if (item_lsn != commit_lsn) { |
1458 | ||
1459 | /* | |
1460 | * Not a bulk update option due to unusual item_lsn. | |
1461 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
1462 | * we have the ail lock. Then unpin the item. This does |
1463 | * not affect the AIL cursor the bulk insert path is | |
1464 | * using. | |
0e57f6a3 DC |
1465 | */ |
1466 | spin_lock(&ailp->xa_lock); | |
1467 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
1468 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
1469 | else | |
1470 | spin_unlock(&ailp->xa_lock); | |
1471 | IOP_UNPIN(lip, 0); | |
1472 | continue; | |
1473 | } | |
1474 | ||
1475 | /* Item is a candidate for bulk AIL insert. */ | |
1476 | log_items[i++] = lv->lv_item; | |
1477 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 1478 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
1479 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
1480 | i = 0; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | /* make sure we insert the remainder! */ | |
1485 | if (i) | |
1d8c95a3 DC |
1486 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
1487 | ||
1488 | spin_lock(&ailp->xa_lock); | |
1489 | xfs_trans_ail_cursor_done(ailp, &cur); | |
1490 | spin_unlock(&ailp->xa_lock); | |
0e57f6a3 DC |
1491 | } |
1492 | ||
0924378a | 1493 | /* |
b1037058 | 1494 | * Commit the given transaction to the log. |
0924378a DC |
1495 | * |
1496 | * XFS disk error handling mechanism is not based on a typical | |
1497 | * transaction abort mechanism. Logically after the filesystem | |
1498 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
1499 | * be durable - ie. committed to disk - because some metadata might | |
1500 | * be inconsistent. In such cases, this returns an error, and the | |
1501 | * caller may assume that all locked objects joined to the transaction | |
1502 | * have already been unlocked as if the commit had succeeded. | |
1503 | * Do not reference the transaction structure after this call. | |
1504 | */ | |
0924378a | 1505 | int |
b1037058 | 1506 | xfs_trans_commit( |
a3ccd2ca | 1507 | struct xfs_trans *tp, |
b1037058 | 1508 | uint flags) |
0924378a | 1509 | { |
a3ccd2ca | 1510 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 1511 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 1512 | int error = 0; |
0924378a DC |
1513 | int log_flags = 0; |
1514 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
1515 | |
1516 | /* | |
1517 | * Determine whether this commit is releasing a permanent | |
1518 | * log reservation or not. | |
1519 | */ | |
1520 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1521 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1522 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * If there is nothing to be logged by the transaction, | |
1527 | * then unlock all of the items associated with the | |
1528 | * transaction and free the transaction structure. | |
1529 | * Also make sure to return any reserved blocks to | |
1530 | * the free pool. | |
1531 | */ | |
a3ccd2ca CH |
1532 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
1533 | goto out_unreserve; | |
1534 | ||
1535 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
1536 | error = XFS_ERROR(EIO); | |
1537 | goto out_unreserve; | |
0924378a | 1538 | } |
a3ccd2ca | 1539 | |
0924378a DC |
1540 | ASSERT(tp->t_ticket != NULL); |
1541 | ||
1542 | /* | |
1543 | * If we need to update the superblock, then do it now. | |
1544 | */ | |
1545 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
1546 | xfs_trans_apply_sb_deltas(tp); | |
1547 | xfs_trans_apply_dquot_deltas(tp); | |
1548 | ||
0244b960 | 1549 | error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
0924378a DC |
1550 | if (error == ENOMEM) { |
1551 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); | |
a3ccd2ca CH |
1552 | error = XFS_ERROR(EIO); |
1553 | goto out_unreserve; | |
0924378a | 1554 | } |
1da177e4 | 1555 | |
0244b960 CH |
1556 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1557 | xfs_trans_free(tp); | |
1558 | ||
1da177e4 LT |
1559 | /* |
1560 | * If the transaction needs to be synchronous, then force the | |
1561 | * log out now and wait for it. | |
1562 | */ | |
1563 | if (sync) { | |
f538d4da | 1564 | if (!error) { |
a14a348b | 1565 | error = _xfs_log_force_lsn(mp, commit_lsn, |
b1037058 | 1566 | XFS_LOG_SYNC, NULL); |
f538d4da | 1567 | } |
1da177e4 LT |
1568 | XFS_STATS_INC(xs_trans_sync); |
1569 | } else { | |
1570 | XFS_STATS_INC(xs_trans_async); | |
1571 | } | |
1572 | ||
a3ccd2ca CH |
1573 | return error; |
1574 | ||
1575 | out_unreserve: | |
1576 | xfs_trans_unreserve_and_mod_sb(tp); | |
1577 | ||
1578 | /* | |
1579 | * It is indeed possible for the transaction to be not dirty but | |
1580 | * the dqinfo portion to be. All that means is that we have some | |
1581 | * (non-persistent) quota reservations that need to be unreserved. | |
1582 | */ | |
1583 | xfs_trans_unreserve_and_mod_dquots(tp); | |
1584 | if (tp->t_ticket) { | |
1585 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
1586 | if (commit_lsn == -1 && !error) | |
1587 | error = XFS_ERROR(EIO); | |
1588 | } | |
1589 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 1590 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
1591 | xfs_trans_free(tp); |
1592 | ||
1593 | XFS_STATS_INC(xs_trans_empty); | |
1594 | return error; | |
1da177e4 LT |
1595 | } |
1596 | ||
1da177e4 LT |
1597 | /* |
1598 | * Unlock all of the transaction's items and free the transaction. | |
1599 | * The transaction must not have modified any of its items, because | |
1600 | * there is no way to restore them to their previous state. | |
1601 | * | |
1602 | * If the transaction has made a log reservation, make sure to release | |
1603 | * it as well. | |
1604 | */ | |
1605 | void | |
1606 | xfs_trans_cancel( | |
1607 | xfs_trans_t *tp, | |
1608 | int flags) | |
1609 | { | |
1610 | int log_flags; | |
0733af21 | 1611 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1612 | |
1613 | /* | |
1614 | * See if the caller is being too lazy to figure out if | |
1615 | * the transaction really needs an abort. | |
1616 | */ | |
1617 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
1618 | flags &= ~XFS_TRANS_ABORT; | |
1619 | /* | |
1620 | * See if the caller is relying on us to shut down the | |
1621 | * filesystem. This happens in paths where we detect | |
1622 | * corruption and decide to give up. | |
1623 | */ | |
60a204f0 | 1624 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1625 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1626 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1627 | } |
1da177e4 | 1628 | #ifdef DEBUG |
e98c414f CH |
1629 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
1630 | struct xfs_log_item_desc *lidp; | |
1631 | ||
1632 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
1633 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1634 | } |
1635 | #endif | |
1636 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1637 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
1638 | |
1639 | if (tp->t_ticket) { | |
1640 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1641 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1642 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1643 | } else { | |
1644 | log_flags = 0; | |
1645 | } | |
0733af21 | 1646 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1647 | } |
1648 | ||
1649 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1650 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 1651 | |
71e330b5 | 1652 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
1653 | xfs_trans_free(tp); |
1654 | } | |
1655 | ||
322ff6b8 NS |
1656 | /* |
1657 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1658 | * the next: permanent transactions are only flushed out when | |
1659 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
1660 | * as possible to let chunks of it go to the log. So we commit the | |
1661 | * chunk we've been working on and get a new transaction to continue. | |
1662 | */ | |
1663 | int | |
1664 | xfs_trans_roll( | |
1665 | struct xfs_trans **tpp, | |
1666 | struct xfs_inode *dp) | |
1667 | { | |
1668 | struct xfs_trans *trans; | |
1669 | unsigned int logres, count; | |
1670 | int error; | |
1671 | ||
1672 | /* | |
1673 | * Ensure that the inode is always logged. | |
1674 | */ | |
1675 | trans = *tpp; | |
1676 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1677 | ||
1678 | /* | |
1679 | * Copy the critical parameters from one trans to the next. | |
1680 | */ | |
1681 | logres = trans->t_log_res; | |
1682 | count = trans->t_log_count; | |
1683 | *tpp = xfs_trans_dup(trans); | |
1684 | ||
1685 | /* | |
1686 | * Commit the current transaction. | |
1687 | * If this commit failed, then it'd just unlock those items that | |
1688 | * are not marked ihold. That also means that a filesystem shutdown | |
1689 | * is in progress. The caller takes the responsibility to cancel | |
1690 | * the duplicate transaction that gets returned. | |
1691 | */ | |
1692 | error = xfs_trans_commit(trans, 0); | |
1693 | if (error) | |
1694 | return (error); | |
1695 | ||
1696 | trans = *tpp; | |
1697 | ||
cc09c0dc DC |
1698 | /* |
1699 | * transaction commit worked ok so we can drop the extra ticket | |
1700 | * reference that we gained in xfs_trans_dup() | |
1701 | */ | |
1702 | xfs_log_ticket_put(trans->t_ticket); | |
1703 | ||
1704 | ||
322ff6b8 NS |
1705 | /* |
1706 | * Reserve space in the log for th next transaction. | |
1707 | * This also pushes items in the "AIL", the list of logged items, | |
1708 | * out to disk if they are taking up space at the tail of the log | |
1709 | * that we want to use. This requires that either nothing be locked | |
1710 | * across this call, or that anything that is locked be logged in | |
1711 | * the prior and the next transactions. | |
1712 | */ | |
1713 | error = xfs_trans_reserve(trans, 0, logres, 0, | |
1714 | XFS_TRANS_PERM_LOG_RES, count); | |
1715 | /* | |
1716 | * Ensure that the inode is in the new transaction and locked. | |
1717 | */ | |
1718 | if (error) | |
1719 | return error; | |
1720 | ||
ddc3415a | 1721 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1722 | return 0; |
1723 | } |