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7fd36c44 DC |
1 | /* |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. | |
3 | * Copyright (C) 2010 Red Hat, Inc. | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
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. | |
14 | * | |
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 | |
18 | */ | |
19 | #include "xfs.h" | |
20 | #include "xfs_fs.h" | |
70a9883c | 21 | #include "xfs_shared.h" |
239880ef DC |
22 | #include "xfs_format.h" |
23 | #include "xfs_log_format.h" | |
7fd36c44 | 24 | #include "xfs_trans_resv.h" |
7fd36c44 DC |
25 | #include "xfs_sb.h" |
26 | #include "xfs_ag.h" | |
27 | #include "xfs_mount.h" | |
57062787 | 28 | #include "xfs_da_format.h" |
7fd36c44 | 29 | #include "xfs_inode.h" |
a4fbe6ab | 30 | #include "xfs_bmap_btree.h" |
7fd36c44 | 31 | #include "xfs_ialloc.h" |
7fd36c44 | 32 | #include "xfs_quota.h" |
239880ef | 33 | #include "xfs_trans.h" |
7fd36c44 DC |
34 | #include "xfs_qm.h" |
35 | #include "xfs_trans_space.h" | |
36 | #include "xfs_trace.h" | |
37 | ||
38 | /* | |
39 | * A buffer has a format structure overhead in the log in addition | |
40 | * to the data, so we need to take this into account when reserving | |
41 | * space in a transaction for a buffer. Round the space required up | |
42 | * to a multiple of 128 bytes so that we don't change the historical | |
43 | * reservation that has been used for this overhead. | |
44 | */ | |
45 | STATIC uint | |
46 | xfs_buf_log_overhead(void) | |
47 | { | |
48 | return round_up(sizeof(struct xlog_op_header) + | |
49 | sizeof(struct xfs_buf_log_format), 128); | |
50 | } | |
51 | ||
52 | /* | |
53 | * Calculate out transaction log reservation per item in bytes. | |
54 | * | |
55 | * The nbufs argument is used to indicate the number of items that | |
56 | * will be changed in a transaction. size is used to tell how many | |
57 | * bytes should be reserved per item. | |
58 | */ | |
59 | STATIC uint | |
60 | xfs_calc_buf_res( | |
61 | uint nbufs, | |
62 | uint size) | |
63 | { | |
64 | return nbufs * (size + xfs_buf_log_overhead()); | |
65 | } | |
66 | ||
23956703 DC |
67 | /* |
68 | * Logging inodes is really tricksy. They are logged in memory format, | |
69 | * which means that what we write into the log doesn't directly translate into | |
70 | * the amount of space they use on disk. | |
71 | * | |
72 | * Case in point - btree format forks in memory format use more space than the | |
73 | * on-disk format. In memory, the buffer contains a normal btree block header so | |
74 | * the btree code can treat it as though it is just another generic buffer. | |
75 | * However, when we write it to the inode fork, we don't write all of this | |
76 | * header as it isn't needed. e.g. the root is only ever in the inode, so | |
77 | * there's no need for sibling pointers which would waste 16 bytes of space. | |
78 | * | |
79 | * Hence when we have an inode with a maximally sized btree format fork, then | |
80 | * amount of information we actually log is greater than the size of the inode | |
81 | * on disk. Hence we need an inode reservation function that calculates all this | |
82 | * correctly. So, we log: | |
83 | * | |
fe4c224a DC |
84 | * - 4 log op headers for object |
85 | * - for the ilf, the inode core and 2 forks | |
23956703 | 86 | * - inode log format object |
fe4c224a DC |
87 | * - the inode core |
88 | * - two inode forks containing bmap btree root blocks. | |
89 | * - the btree data contained by both forks will fit into the inode size, | |
90 | * hence when combined with the inode core above, we have a total of the | |
91 | * actual inode size. | |
92 | * - the BMBT headers need to be accounted separately, as they are | |
93 | * additional to the records and pointers that fit inside the inode | |
94 | * forks. | |
23956703 DC |
95 | */ |
96 | STATIC uint | |
97 | xfs_calc_inode_res( | |
98 | struct xfs_mount *mp, | |
99 | uint ninodes) | |
100 | { | |
fe4c224a DC |
101 | return ninodes * |
102 | (4 * sizeof(struct xlog_op_header) + | |
103 | sizeof(struct xfs_inode_log_format) + | |
104 | mp->m_sb.sb_inodesize + | |
105 | 2 * XFS_BMBT_BLOCK_LEN(mp)); | |
23956703 DC |
106 | } |
107 | ||
7fd36c44 DC |
108 | /* |
109 | * Various log reservation values. | |
110 | * | |
111 | * These are based on the size of the file system block because that is what | |
112 | * most transactions manipulate. Each adds in an additional 128 bytes per | |
113 | * item logged to try to account for the overhead of the transaction mechanism. | |
114 | * | |
115 | * Note: Most of the reservations underestimate the number of allocation | |
116 | * groups into which they could free extents in the xfs_bmap_finish() call. | |
117 | * This is because the number in the worst case is quite high and quite | |
118 | * unusual. In order to fix this we need to change xfs_bmap_finish() to free | |
119 | * extents in only a single AG at a time. This will require changes to the | |
120 | * EFI code as well, however, so that the EFI for the extents not freed is | |
121 | * logged again in each transaction. See SGI PV #261917. | |
122 | * | |
123 | * Reservation functions here avoid a huge stack in xfs_trans_init due to | |
124 | * register overflow from temporaries in the calculations. | |
125 | */ | |
126 | ||
127 | ||
128 | /* | |
129 | * In a write transaction we can allocate a maximum of 2 | |
130 | * extents. This gives: | |
131 | * the inode getting the new extents: inode size | |
132 | * the inode's bmap btree: max depth * block size | |
133 | * the agfs of the ags from which the extents are allocated: 2 * sector | |
134 | * the superblock free block counter: sector size | |
135 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
136 | * And the bmap_finish transaction can free bmap blocks in a join: | |
137 | * the agfs of the ags containing the blocks: 2 * sector size | |
138 | * the agfls of the ags containing the blocks: 2 * sector size | |
139 | * the super block free block counter: sector size | |
140 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
141 | */ | |
142 | STATIC uint | |
143 | xfs_calc_write_reservation( | |
144 | struct xfs_mount *mp) | |
145 | { | |
146 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 147 | MAX((xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
148 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), |
149 | XFS_FSB_TO_B(mp, 1)) + | |
150 | xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + | |
151 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
152 | XFS_FSB_TO_B(mp, 1))), | |
153 | (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + | |
154 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
155 | XFS_FSB_TO_B(mp, 1)))); | |
156 | } | |
157 | ||
158 | /* | |
159 | * In truncating a file we free up to two extents at once. We can modify: | |
160 | * the inode being truncated: inode size | |
161 | * the inode's bmap btree: (max depth + 1) * block size | |
162 | * And the bmap_finish transaction can free the blocks and bmap blocks: | |
163 | * the agf for each of the ags: 4 * sector size | |
164 | * the agfl for each of the ags: 4 * sector size | |
165 | * the super block to reflect the freed blocks: sector size | |
166 | * worst case split in allocation btrees per extent assuming 4 extents: | |
167 | * 4 exts * 2 trees * (2 * max depth - 1) * block size | |
168 | * the inode btree: max depth * blocksize | |
169 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
170 | */ | |
171 | STATIC uint | |
172 | xfs_calc_itruncate_reservation( | |
173 | struct xfs_mount *mp) | |
174 | { | |
175 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 176 | MAX((xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
177 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1, |
178 | XFS_FSB_TO_B(mp, 1))), | |
179 | (xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + | |
180 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 4), | |
181 | XFS_FSB_TO_B(mp, 1)) + | |
182 | xfs_calc_buf_res(5, 0) + | |
183 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
184 | XFS_FSB_TO_B(mp, 1)) + | |
126cd105 | 185 | xfs_calc_buf_res(2 + mp->m_ialloc_blks + |
7fd36c44 DC |
186 | mp->m_in_maxlevels, 0))); |
187 | } | |
188 | ||
189 | /* | |
190 | * In renaming a files we can modify: | |
191 | * the four inodes involved: 4 * inode size | |
192 | * the two directory btrees: 2 * (max depth + v2) * dir block size | |
193 | * the two directory bmap btrees: 2 * max depth * block size | |
194 | * And the bmap_finish transaction can free dir and bmap blocks (two sets | |
195 | * of bmap blocks) giving: | |
196 | * the agf for the ags in which the blocks live: 3 * sector size | |
197 | * the agfl for the ags in which the blocks live: 3 * sector size | |
198 | * the superblock for the free block count: sector size | |
199 | * the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size | |
200 | */ | |
201 | STATIC uint | |
202 | xfs_calc_rename_reservation( | |
203 | struct xfs_mount *mp) | |
204 | { | |
205 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 206 | MAX((xfs_calc_inode_res(mp, 4) + |
7fd36c44 DC |
207 | xfs_calc_buf_res(2 * XFS_DIROP_LOG_COUNT(mp), |
208 | XFS_FSB_TO_B(mp, 1))), | |
209 | (xfs_calc_buf_res(7, mp->m_sb.sb_sectsize) + | |
210 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 3), | |
211 | XFS_FSB_TO_B(mp, 1)))); | |
212 | } | |
213 | ||
ab297431 ZYW |
214 | /* |
215 | * For removing an inode from unlinked list at first, we can modify: | |
216 | * the agi hash list and counters: sector size | |
217 | * the on disk inode before ours in the agi hash list: inode cluster size | |
218 | */ | |
219 | STATIC uint | |
220 | xfs_calc_iunlink_remove_reservation( | |
221 | struct xfs_mount *mp) | |
222 | { | |
223 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
fe986f9d | 224 | max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size); |
ab297431 ZYW |
225 | } |
226 | ||
7fd36c44 DC |
227 | /* |
228 | * For creating a link to an inode: | |
229 | * the parent directory inode: inode size | |
230 | * the linked inode: inode size | |
231 | * the directory btree could split: (max depth + v2) * dir block size | |
232 | * the directory bmap btree could join or split: (max depth + v2) * blocksize | |
233 | * And the bmap_finish transaction can free some bmap blocks giving: | |
234 | * the agf for the ag in which the blocks live: sector size | |
235 | * the agfl for the ag in which the blocks live: sector size | |
236 | * the superblock for the free block count: sector size | |
237 | * the allocation btrees: 2 trees * (2 * max depth - 1) * block size | |
238 | */ | |
239 | STATIC uint | |
240 | xfs_calc_link_reservation( | |
241 | struct xfs_mount *mp) | |
242 | { | |
243 | return XFS_DQUOT_LOGRES(mp) + | |
ab297431 | 244 | xfs_calc_iunlink_remove_reservation(mp) + |
23956703 | 245 | MAX((xfs_calc_inode_res(mp, 2) + |
7fd36c44 DC |
246 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), |
247 | XFS_FSB_TO_B(mp, 1))), | |
248 | (xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + | |
249 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
250 | XFS_FSB_TO_B(mp, 1)))); | |
251 | } | |
252 | ||
99b6436b ZYW |
253 | /* |
254 | * For adding an inode to unlinked list we can modify: | |
255 | * the agi hash list: sector size | |
256 | * the unlinked inode: inode size | |
257 | */ | |
258 | STATIC uint | |
259 | xfs_calc_iunlink_add_reservation(xfs_mount_t *mp) | |
260 | { | |
261 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
262 | xfs_calc_inode_res(mp, 1); | |
263 | } | |
264 | ||
7fd36c44 DC |
265 | /* |
266 | * For removing a directory entry we can modify: | |
267 | * the parent directory inode: inode size | |
268 | * the removed inode: inode size | |
269 | * the directory btree could join: (max depth + v2) * dir block size | |
270 | * the directory bmap btree could join or split: (max depth + v2) * blocksize | |
271 | * And the bmap_finish transaction can free the dir and bmap blocks giving: | |
272 | * the agf for the ag in which the blocks live: 2 * sector size | |
273 | * the agfl for the ag in which the blocks live: 2 * sector size | |
274 | * the superblock for the free block count: sector size | |
275 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
276 | */ | |
277 | STATIC uint | |
278 | xfs_calc_remove_reservation( | |
279 | struct xfs_mount *mp) | |
280 | { | |
281 | return XFS_DQUOT_LOGRES(mp) + | |
99b6436b ZYW |
282 | xfs_calc_iunlink_add_reservation(mp) + |
283 | MAX((xfs_calc_inode_res(mp, 1) + | |
7fd36c44 DC |
284 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), |
285 | XFS_FSB_TO_B(mp, 1))), | |
99b6436b | 286 | (xfs_calc_buf_res(4, mp->m_sb.sb_sectsize) + |
7fd36c44 DC |
287 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), |
288 | XFS_FSB_TO_B(mp, 1)))); | |
289 | } | |
290 | ||
291 | /* | |
292 | * For create, break it in to the two cases that the transaction | |
293 | * covers. We start with the modify case - allocation done by modification | |
294 | * of the state of existing inodes - and the allocation case. | |
295 | */ | |
296 | ||
297 | /* | |
298 | * For create we can modify: | |
299 | * the parent directory inode: inode size | |
300 | * the new inode: inode size | |
301 | * the inode btree entry: block size | |
302 | * the superblock for the nlink flag: sector size | |
303 | * the directory btree: (max depth + v2) * dir block size | |
304 | * the directory inode's bmap btree: (max depth + v2) * block size | |
305 | */ | |
306 | STATIC uint | |
307 | xfs_calc_create_resv_modify( | |
308 | struct xfs_mount *mp) | |
309 | { | |
23956703 | 310 | return xfs_calc_inode_res(mp, 2) + |
7fd36c44 DC |
311 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
312 | (uint)XFS_FSB_TO_B(mp, 1) + | |
313 | xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), XFS_FSB_TO_B(mp, 1)); | |
314 | } | |
315 | ||
316 | /* | |
317 | * For create we can allocate some inodes giving: | |
318 | * the agi and agf of the ag getting the new inodes: 2 * sectorsize | |
319 | * the superblock for the nlink flag: sector size | |
126cd105 | 320 | * the inode blocks allocated: mp->m_ialloc_blks * blocksize |
7fd36c44 DC |
321 | * the inode btree: max depth * blocksize |
322 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
323 | */ | |
324 | STATIC uint | |
325 | xfs_calc_create_resv_alloc( | |
326 | struct xfs_mount *mp) | |
327 | { | |
328 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
329 | mp->m_sb.sb_sectsize + | |
126cd105 | 330 | xfs_calc_buf_res(mp->m_ialloc_blks, XFS_FSB_TO_B(mp, 1)) + |
7fd36c44 DC |
331 | xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + |
332 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
333 | XFS_FSB_TO_B(mp, 1)); | |
334 | } | |
335 | ||
336 | STATIC uint | |
337 | __xfs_calc_create_reservation( | |
338 | struct xfs_mount *mp) | |
339 | { | |
340 | return XFS_DQUOT_LOGRES(mp) + | |
341 | MAX(xfs_calc_create_resv_alloc(mp), | |
342 | xfs_calc_create_resv_modify(mp)); | |
343 | } | |
344 | ||
345 | /* | |
346 | * For icreate we can allocate some inodes giving: | |
347 | * the agi and agf of the ag getting the new inodes: 2 * sectorsize | |
348 | * the superblock for the nlink flag: sector size | |
349 | * the inode btree: max depth * blocksize | |
350 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
351 | */ | |
352 | STATIC uint | |
353 | xfs_calc_icreate_resv_alloc( | |
354 | struct xfs_mount *mp) | |
355 | { | |
356 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
357 | mp->m_sb.sb_sectsize + | |
358 | xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) + | |
359 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
360 | XFS_FSB_TO_B(mp, 1)); | |
361 | } | |
362 | ||
363 | STATIC uint | |
364 | xfs_calc_icreate_reservation(xfs_mount_t *mp) | |
365 | { | |
366 | return XFS_DQUOT_LOGRES(mp) + | |
367 | MAX(xfs_calc_icreate_resv_alloc(mp), | |
368 | xfs_calc_create_resv_modify(mp)); | |
369 | } | |
370 | ||
371 | STATIC uint | |
372 | xfs_calc_create_reservation( | |
373 | struct xfs_mount *mp) | |
374 | { | |
375 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
376 | return xfs_calc_icreate_reservation(mp); | |
377 | return __xfs_calc_create_reservation(mp); | |
378 | ||
379 | } | |
380 | ||
99b6436b ZYW |
381 | STATIC uint |
382 | xfs_calc_create_tmpfile_reservation( | |
383 | struct xfs_mount *mp) | |
384 | { | |
385 | uint res = XFS_DQUOT_LOGRES(mp); | |
386 | ||
387 | if (xfs_sb_version_hascrc(&mp->m_sb)) | |
388 | res += xfs_calc_icreate_resv_alloc(mp); | |
389 | else | |
390 | res += xfs_calc_create_resv_alloc(mp); | |
391 | ||
392 | return res + xfs_calc_iunlink_add_reservation(mp); | |
393 | } | |
394 | ||
7fd36c44 DC |
395 | /* |
396 | * Making a new directory is the same as creating a new file. | |
397 | */ | |
398 | STATIC uint | |
399 | xfs_calc_mkdir_reservation( | |
400 | struct xfs_mount *mp) | |
401 | { | |
402 | return xfs_calc_create_reservation(mp); | |
403 | } | |
404 | ||
405 | ||
406 | /* | |
407 | * Making a new symplink is the same as creating a new file, but | |
408 | * with the added blocks for remote symlink data which can be up to 1kB in | |
409 | * length (MAXPATHLEN). | |
410 | */ | |
411 | STATIC uint | |
412 | xfs_calc_symlink_reservation( | |
413 | struct xfs_mount *mp) | |
414 | { | |
415 | return xfs_calc_create_reservation(mp) + | |
416 | xfs_calc_buf_res(1, MAXPATHLEN); | |
417 | } | |
418 | ||
419 | /* | |
420 | * In freeing an inode we can modify: | |
421 | * the inode being freed: inode size | |
422 | * the super block free inode counter: sector size | |
423 | * the agi hash list and counters: sector size | |
424 | * the inode btree entry: block size | |
425 | * the on disk inode before ours in the agi hash list: inode cluster size | |
426 | * the inode btree: max depth * blocksize | |
427 | * the allocation btrees: 2 trees * (max depth - 1) * block size | |
428 | */ | |
429 | STATIC uint | |
430 | xfs_calc_ifree_reservation( | |
431 | struct xfs_mount *mp) | |
432 | { | |
433 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 434 | xfs_calc_inode_res(mp, 1) + |
ab297431 | 435 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
7fd36c44 | 436 | xfs_calc_buf_res(1, XFS_FSB_TO_B(mp, 1)) + |
ab297431 | 437 | xfs_calc_iunlink_remove_reservation(mp) + |
7fd36c44 | 438 | xfs_calc_buf_res(1, 0) + |
126cd105 | 439 | xfs_calc_buf_res(2 + mp->m_ialloc_blks + |
7fd36c44 DC |
440 | mp->m_in_maxlevels, 0) + |
441 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
442 | XFS_FSB_TO_B(mp, 1)); | |
443 | } | |
444 | ||
445 | /* | |
446 | * When only changing the inode we log the inode and possibly the superblock | |
447 | * We also add a bit of slop for the transaction stuff. | |
448 | */ | |
449 | STATIC uint | |
450 | xfs_calc_ichange_reservation( | |
451 | struct xfs_mount *mp) | |
452 | { | |
453 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 DC |
454 | xfs_calc_inode_res(mp, 1) + |
455 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
7fd36c44 DC |
456 | |
457 | } | |
458 | ||
459 | /* | |
460 | * Growing the data section of the filesystem. | |
461 | * superblock | |
462 | * agi and agf | |
463 | * allocation btrees | |
464 | */ | |
465 | STATIC uint | |
466 | xfs_calc_growdata_reservation( | |
467 | struct xfs_mount *mp) | |
468 | { | |
469 | return xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + | |
470 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
471 | XFS_FSB_TO_B(mp, 1)); | |
472 | } | |
473 | ||
474 | /* | |
475 | * Growing the rt section of the filesystem. | |
476 | * In the first set of transactions (ALLOC) we allocate space to the | |
477 | * bitmap or summary files. | |
478 | * superblock: sector size | |
479 | * agf of the ag from which the extent is allocated: sector size | |
480 | * bmap btree for bitmap/summary inode: max depth * blocksize | |
481 | * bitmap/summary inode: inode size | |
482 | * allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize | |
483 | */ | |
484 | STATIC uint | |
485 | xfs_calc_growrtalloc_reservation( | |
486 | struct xfs_mount *mp) | |
487 | { | |
488 | return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + | |
489 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), | |
490 | XFS_FSB_TO_B(mp, 1)) + | |
23956703 | 491 | xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
492 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), |
493 | XFS_FSB_TO_B(mp, 1)); | |
494 | } | |
495 | ||
496 | /* | |
497 | * Growing the rt section of the filesystem. | |
498 | * In the second set of transactions (ZERO) we zero the new metadata blocks. | |
499 | * one bitmap/summary block: blocksize | |
500 | */ | |
501 | STATIC uint | |
502 | xfs_calc_growrtzero_reservation( | |
503 | struct xfs_mount *mp) | |
504 | { | |
505 | return xfs_calc_buf_res(1, mp->m_sb.sb_blocksize); | |
506 | } | |
507 | ||
508 | /* | |
509 | * Growing the rt section of the filesystem. | |
510 | * In the third set of transactions (FREE) we update metadata without | |
511 | * allocating any new blocks. | |
512 | * superblock: sector size | |
513 | * bitmap inode: inode size | |
514 | * summary inode: inode size | |
515 | * one bitmap block: blocksize | |
516 | * summary blocks: new summary size | |
517 | */ | |
518 | STATIC uint | |
519 | xfs_calc_growrtfree_reservation( | |
520 | struct xfs_mount *mp) | |
521 | { | |
522 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
23956703 | 523 | xfs_calc_inode_res(mp, 2) + |
7fd36c44 DC |
524 | xfs_calc_buf_res(1, mp->m_sb.sb_blocksize) + |
525 | xfs_calc_buf_res(1, mp->m_rsumsize); | |
526 | } | |
527 | ||
528 | /* | |
529 | * Logging the inode modification timestamp on a synchronous write. | |
530 | * inode | |
531 | */ | |
532 | STATIC uint | |
533 | xfs_calc_swrite_reservation( | |
534 | struct xfs_mount *mp) | |
535 | { | |
23956703 | 536 | return xfs_calc_inode_res(mp, 1); |
7fd36c44 DC |
537 | } |
538 | ||
539 | /* | |
540 | * Logging the inode mode bits when writing a setuid/setgid file | |
541 | * inode | |
542 | */ | |
543 | STATIC uint | |
23956703 DC |
544 | xfs_calc_writeid_reservation( |
545 | struct xfs_mount *mp) | |
7fd36c44 | 546 | { |
23956703 | 547 | return xfs_calc_inode_res(mp, 1); |
7fd36c44 DC |
548 | } |
549 | ||
550 | /* | |
551 | * Converting the inode from non-attributed to attributed. | |
552 | * the inode being converted: inode size | |
553 | * agf block and superblock (for block allocation) | |
554 | * the new block (directory sized) | |
555 | * bmap blocks for the new directory block | |
556 | * allocation btrees | |
557 | */ | |
558 | STATIC uint | |
559 | xfs_calc_addafork_reservation( | |
560 | struct xfs_mount *mp) | |
561 | { | |
562 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 563 | xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
564 | xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + |
565 | xfs_calc_buf_res(1, mp->m_dirblksize) + | |
566 | xfs_calc_buf_res(XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1, | |
567 | XFS_FSB_TO_B(mp, 1)) + | |
568 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 1), | |
569 | XFS_FSB_TO_B(mp, 1)); | |
570 | } | |
571 | ||
572 | /* | |
573 | * Removing the attribute fork of a file | |
574 | * the inode being truncated: inode size | |
575 | * the inode's bmap btree: max depth * block size | |
576 | * And the bmap_finish transaction can free the blocks and bmap blocks: | |
577 | * the agf for each of the ags: 4 * sector size | |
578 | * the agfl for each of the ags: 4 * sector size | |
579 | * the super block to reflect the freed blocks: sector size | |
580 | * worst case split in allocation btrees per extent assuming 4 extents: | |
581 | * 4 exts * 2 trees * (2 * max depth - 1) * block size | |
582 | */ | |
583 | STATIC uint | |
584 | xfs_calc_attrinval_reservation( | |
585 | struct xfs_mount *mp) | |
586 | { | |
23956703 | 587 | return MAX((xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
588 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), |
589 | XFS_FSB_TO_B(mp, 1))), | |
590 | (xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + | |
591 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 4), | |
592 | XFS_FSB_TO_B(mp, 1)))); | |
593 | } | |
594 | ||
595 | /* | |
596 | * Setting an attribute at mount time. | |
597 | * the inode getting the attribute | |
598 | * the superblock for allocations | |
599 | * the agfs extents are allocated from | |
600 | * the attribute btree * max depth | |
601 | * the inode allocation btree | |
602 | * Since attribute transaction space is dependent on the size of the attribute, | |
603 | * the calculation is done partially at mount time and partially at runtime(see | |
604 | * below). | |
605 | */ | |
606 | STATIC uint | |
607 | xfs_calc_attrsetm_reservation( | |
608 | struct xfs_mount *mp) | |
609 | { | |
610 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 611 | xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
612 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
613 | xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, XFS_FSB_TO_B(mp, 1)); | |
614 | } | |
615 | ||
616 | /* | |
617 | * Setting an attribute at runtime, transaction space unit per block. | |
618 | * the superblock for allocations: sector size | |
619 | * the inode bmap btree could join or split: max depth * block size | |
620 | * Since the runtime attribute transaction space is dependent on the total | |
621 | * blocks needed for the 1st bmap, here we calculate out the space unit for | |
622 | * one block so that the caller could figure out the total space according | |
3d3c8b52 JL |
623 | * to the attibute extent length in blocks by: |
624 | * ext * M_RES(mp)->tr_attrsetrt.tr_logres | |
7fd36c44 DC |
625 | */ |
626 | STATIC uint | |
627 | xfs_calc_attrsetrt_reservation( | |
628 | struct xfs_mount *mp) | |
629 | { | |
630 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + | |
631 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), | |
632 | XFS_FSB_TO_B(mp, 1)); | |
633 | } | |
634 | ||
635 | /* | |
636 | * Removing an attribute. | |
637 | * the inode: inode size | |
638 | * the attribute btree could join: max depth * block size | |
639 | * the inode bmap btree could join or split: max depth * block size | |
640 | * And the bmap_finish transaction can free the attr blocks freed giving: | |
641 | * the agf for the ag in which the blocks live: 2 * sector size | |
642 | * the agfl for the ag in which the blocks live: 2 * sector size | |
643 | * the superblock for the free block count: sector size | |
644 | * the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size | |
645 | */ | |
646 | STATIC uint | |
647 | xfs_calc_attrrm_reservation( | |
648 | struct xfs_mount *mp) | |
649 | { | |
650 | return XFS_DQUOT_LOGRES(mp) + | |
23956703 | 651 | MAX((xfs_calc_inode_res(mp, 1) + |
7fd36c44 DC |
652 | xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, |
653 | XFS_FSB_TO_B(mp, 1)) + | |
654 | (uint)XFS_FSB_TO_B(mp, | |
655 | XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + | |
656 | xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), 0)), | |
657 | (xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + | |
658 | xfs_calc_buf_res(XFS_ALLOCFREE_LOG_COUNT(mp, 2), | |
659 | XFS_FSB_TO_B(mp, 1)))); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Clearing a bad agino number in an agi hash bucket. | |
664 | */ | |
665 | STATIC uint | |
666 | xfs_calc_clear_agi_bucket_reservation( | |
667 | struct xfs_mount *mp) | |
668 | { | |
669 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
670 | } | |
671 | ||
672 | /* | |
673 | * Clearing the quotaflags in the superblock. | |
674 | * the super block for changing quota flags: sector size | |
675 | */ | |
676 | STATIC uint | |
677 | xfs_calc_qm_sbchange_reservation( | |
678 | struct xfs_mount *mp) | |
679 | { | |
680 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
681 | } | |
682 | ||
683 | /* | |
684 | * Adjusting quota limits. | |
685 | * the xfs_disk_dquot_t: sizeof(struct xfs_disk_dquot) | |
686 | */ | |
687 | STATIC uint | |
688 | xfs_calc_qm_setqlim_reservation( | |
689 | struct xfs_mount *mp) | |
690 | { | |
691 | return xfs_calc_buf_res(1, sizeof(struct xfs_disk_dquot)); | |
692 | } | |
693 | ||
694 | /* | |
695 | * Allocating quota on disk if needed. | |
410b11a6 | 696 | * the write transaction log space for quota file extent allocation |
7fd36c44 DC |
697 | * the unit of quota allocation: one system block size |
698 | */ | |
699 | STATIC uint | |
700 | xfs_calc_qm_dqalloc_reservation( | |
701 | struct xfs_mount *mp) | |
702 | { | |
410b11a6 | 703 | return xfs_calc_write_reservation(mp) + |
7fd36c44 DC |
704 | xfs_calc_buf_res(1, |
705 | XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1); | |
706 | } | |
707 | ||
708 | /* | |
709 | * Turning off quotas. | |
710 | * the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2 | |
711 | * the superblock for the quota flags: sector size | |
712 | */ | |
713 | STATIC uint | |
714 | xfs_calc_qm_quotaoff_reservation( | |
715 | struct xfs_mount *mp) | |
716 | { | |
717 | return sizeof(struct xfs_qoff_logitem) * 2 + | |
718 | xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
719 | } | |
720 | ||
721 | /* | |
722 | * End of turning off quotas. | |
723 | * the xfs_qoff_logitem_t: sizeof(struct xfs_qoff_logitem) * 2 | |
724 | */ | |
725 | STATIC uint | |
726 | xfs_calc_qm_quotaoff_end_reservation( | |
727 | struct xfs_mount *mp) | |
728 | { | |
729 | return sizeof(struct xfs_qoff_logitem) * 2; | |
730 | } | |
731 | ||
732 | /* | |
733 | * Syncing the incore super block changes to disk. | |
734 | * the super block to reflect the changes: sector size | |
735 | */ | |
736 | STATIC uint | |
737 | xfs_calc_sb_reservation( | |
738 | struct xfs_mount *mp) | |
739 | { | |
740 | return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); | |
741 | } | |
742 | ||
743 | void | |
744 | xfs_trans_resv_calc( | |
745 | struct xfs_mount *mp, | |
746 | struct xfs_trans_resv *resp) | |
747 | { | |
0eadd102 JL |
748 | /* |
749 | * The following transactions are logged in physical format and | |
750 | * require a permanent reservation on space. | |
751 | */ | |
752 | resp->tr_write.tr_logres = xfs_calc_write_reservation(mp); | |
753 | resp->tr_write.tr_logcount = XFS_WRITE_LOG_COUNT; | |
754 | resp->tr_write.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
755 | ||
756 | resp->tr_itruncate.tr_logres = xfs_calc_itruncate_reservation(mp); | |
757 | resp->tr_itruncate.tr_logcount = XFS_ITRUNCATE_LOG_COUNT; | |
758 | resp->tr_itruncate.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
759 | ||
760 | resp->tr_rename.tr_logres = xfs_calc_rename_reservation(mp); | |
761 | resp->tr_rename.tr_logcount = XFS_RENAME_LOG_COUNT; | |
762 | resp->tr_rename.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
763 | ||
764 | resp->tr_link.tr_logres = xfs_calc_link_reservation(mp); | |
765 | resp->tr_link.tr_logcount = XFS_LINK_LOG_COUNT; | |
766 | resp->tr_link.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
767 | ||
768 | resp->tr_remove.tr_logres = xfs_calc_remove_reservation(mp); | |
769 | resp->tr_remove.tr_logcount = XFS_REMOVE_LOG_COUNT; | |
770 | resp->tr_remove.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
771 | ||
772 | resp->tr_symlink.tr_logres = xfs_calc_symlink_reservation(mp); | |
773 | resp->tr_symlink.tr_logcount = XFS_SYMLINK_LOG_COUNT; | |
774 | resp->tr_symlink.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
775 | ||
776 | resp->tr_create.tr_logres = xfs_calc_create_reservation(mp); | |
777 | resp->tr_create.tr_logcount = XFS_CREATE_LOG_COUNT; | |
778 | resp->tr_create.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
779 | ||
99b6436b ZYW |
780 | resp->tr_create_tmpfile.tr_logres = |
781 | xfs_calc_create_tmpfile_reservation(mp); | |
782 | resp->tr_create_tmpfile.tr_logcount = XFS_CREATE_TMPFILE_LOG_COUNT; | |
783 | resp->tr_create_tmpfile.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
784 | ||
0eadd102 JL |
785 | resp->tr_mkdir.tr_logres = xfs_calc_mkdir_reservation(mp); |
786 | resp->tr_mkdir.tr_logcount = XFS_MKDIR_LOG_COUNT; | |
787 | resp->tr_mkdir.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
788 | ||
789 | resp->tr_ifree.tr_logres = xfs_calc_ifree_reservation(mp); | |
790 | resp->tr_ifree.tr_logcount = XFS_INACTIVE_LOG_COUNT; | |
791 | resp->tr_ifree.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
792 | ||
793 | resp->tr_addafork.tr_logres = xfs_calc_addafork_reservation(mp); | |
794 | resp->tr_addafork.tr_logcount = XFS_ADDAFORK_LOG_COUNT; | |
795 | resp->tr_addafork.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
796 | ||
797 | resp->tr_attrinval.tr_logres = xfs_calc_attrinval_reservation(mp); | |
798 | resp->tr_attrinval.tr_logcount = XFS_ATTRINVAL_LOG_COUNT; | |
799 | resp->tr_attrinval.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
800 | ||
801 | resp->tr_attrsetm.tr_logres = xfs_calc_attrsetm_reservation(mp); | |
802 | resp->tr_attrsetm.tr_logcount = XFS_ATTRSET_LOG_COUNT; | |
803 | resp->tr_attrsetm.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
804 | ||
805 | resp->tr_attrrm.tr_logres = xfs_calc_attrrm_reservation(mp); | |
806 | resp->tr_attrrm.tr_logcount = XFS_ATTRRM_LOG_COUNT; | |
807 | resp->tr_attrrm.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
808 | ||
809 | resp->tr_growrtalloc.tr_logres = xfs_calc_growrtalloc_reservation(mp); | |
810 | resp->tr_growrtalloc.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT; | |
811 | resp->tr_growrtalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
812 | ||
813 | resp->tr_qm_dqalloc.tr_logres = xfs_calc_qm_dqalloc_reservation(mp); | |
814 | resp->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT; | |
815 | resp->tr_qm_dqalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; | |
816 | ||
817 | /* | |
818 | * The following transactions are logged in logical format with | |
819 | * a default log count. | |
820 | */ | |
821 | resp->tr_qm_sbchange.tr_logres = xfs_calc_qm_sbchange_reservation(mp); | |
822 | resp->tr_qm_sbchange.tr_logcount = XFS_DEFAULT_LOG_COUNT; | |
823 | ||
824 | resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation(mp); | |
825 | resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT; | |
826 | ||
827 | resp->tr_qm_quotaoff.tr_logres = xfs_calc_qm_quotaoff_reservation(mp); | |
828 | resp->tr_qm_quotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT; | |
829 | ||
830 | resp->tr_qm_equotaoff.tr_logres = | |
831 | xfs_calc_qm_quotaoff_end_reservation(mp); | |
832 | resp->tr_qm_equotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT; | |
833 | ||
834 | resp->tr_sb.tr_logres = xfs_calc_sb_reservation(mp); | |
835 | resp->tr_sb.tr_logcount = XFS_DEFAULT_LOG_COUNT; | |
836 | ||
837 | /* The following transaction are logged in logical format */ | |
838 | resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp); | |
839 | resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp); | |
20996c93 | 840 | resp->tr_fsyncts.tr_logres = xfs_calc_swrite_reservation(mp); |
0eadd102 JL |
841 | resp->tr_writeid.tr_logres = xfs_calc_writeid_reservation(mp); |
842 | resp->tr_attrsetrt.tr_logres = xfs_calc_attrsetrt_reservation(mp); | |
843 | resp->tr_clearagi.tr_logres = xfs_calc_clear_agi_bucket_reservation(mp); | |
844 | resp->tr_growrtzero.tr_logres = xfs_calc_growrtzero_reservation(mp); | |
845 | resp->tr_growrtfree.tr_logres = xfs_calc_growrtfree_reservation(mp); | |
7fd36c44 | 846 | } |