]>
Commit | Line | Data |
---|---|---|
2bd0ea18 | 1 | /* |
f1b058f9 | 2 | * Copyright (c) 2000-2001,2005-2006 Silicon Graphics, Inc. |
4329aa4c | 3 | * Copyright (C) 2010 Red Hat, Inc. |
da23017d | 4 | * All Rights Reserved. |
2bd0ea18 | 5 | * |
da23017d 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 | |
2bd0ea18 NS |
8 | * published by the Free Software Foundation. |
9 | * | |
da23017d 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. | |
2bd0ea18 | 14 | * |
da23017d 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 | |
2bd0ea18 NS |
18 | */ |
19 | ||
9c799827 | 20 | #include "libxfs_priv.h" |
b626fb59 DC |
21 | #include "xfs_fs.h" |
22 | #include "xfs_shared.h" | |
23 | #include "xfs_format.h" | |
24 | #include "xfs_log_format.h" | |
25 | #include "xfs_trans_resv.h" | |
26 | #include "xfs_mount.h" | |
27 | #include "xfs_inode_buf.h" | |
28 | #include "xfs_inode_fork.h" | |
29 | #include "xfs_inode.h" | |
30 | #include "xfs_trans.h" | |
31 | #include "xfs_sb.h" | |
2bd0ea18 | 32 | |
7bcb8403 CH |
33 | static void xfs_trans_free_items(struct xfs_trans *tp); |
34 | ||
2bd0ea18 NS |
35 | /* |
36 | * Simple transaction interface | |
37 | */ | |
38 | ||
67d72279 | 39 | kmem_zone_t *xfs_trans_zone; |
4329aa4c DC |
40 | kmem_zone_t *xfs_log_item_desc_zone; |
41 | ||
42 | /* | |
43 | * Initialize the precomputed transaction reservation values | |
44 | * in the mount structure. | |
45 | */ | |
46 | void | |
47 | libxfs_trans_init( | |
48 | struct xfs_mount *mp) | |
49 | { | |
cf52c730 | 50 | xfs_trans_resv_calc(mp, &mp->m_resv); |
4329aa4c DC |
51 | } |
52 | ||
53 | /* | |
54 | * Add the given log item to the transaction's list of log items. | |
55 | * | |
56 | * The log item will now point to its new descriptor with its li_desc field. | |
57 | */ | |
58 | void | |
59 | libxfs_trans_add_item( | |
60 | struct xfs_trans *tp, | |
61 | struct xfs_log_item *lip) | |
62 | { | |
63 | struct xfs_log_item_desc *lidp; | |
64 | ||
65 | ASSERT(lip->li_mountp == tp->t_mountp); | |
66 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
67 | ||
a1c5615e | 68 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
4329aa4c DC |
69 | |
70 | lidp->lid_item = lip; | |
71 | lidp->lid_flags = 0; | |
72 | list_add_tail(&lidp->lid_trans, &tp->t_items); | |
73 | ||
74 | lip->li_desc = lidp; | |
75 | } | |
76 | ||
a1c5615e ES |
77 | static void |
78 | libxfs_trans_free_item_desc( | |
79 | struct xfs_log_item_desc *lidp) | |
80 | { | |
81 | list_del_init(&lidp->lid_trans); | |
82 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
83 | } | |
84 | ||
4329aa4c DC |
85 | /* |
86 | * Unlink and free the given descriptor. | |
87 | */ | |
88 | void | |
89 | libxfs_trans_del_item( | |
90 | struct xfs_log_item *lip) | |
91 | { | |
a1c5615e | 92 | libxfs_trans_free_item_desc(lip->li_desc); |
4329aa4c DC |
93 | lip->li_desc = NULL; |
94 | } | |
95 | ||
96 | /* | |
97 | * Roll from one trans in the sequence of PERMANENT transactions to | |
98 | * the next: permanent transactions are only flushed out when | |
99 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
100 | * as possible to let chunks of it go to the log. So we commit the | |
101 | * chunk we've been working on and get a new transaction to continue. | |
102 | */ | |
103 | int | |
104 | libxfs_trans_roll( | |
d67406c9 | 105 | struct xfs_trans **tpp) |
4329aa4c | 106 | { |
87307113 | 107 | struct xfs_mount *mp; |
d67406c9 | 108 | struct xfs_trans *trans = *tpp; |
48ea6cb9 | 109 | struct xfs_trans_res tres; |
68f7f684 | 110 | unsigned int old_blk_res; |
4329aa4c DC |
111 | int error; |
112 | ||
4329aa4c DC |
113 | /* |
114 | * Copy the critical parameters from one trans to the next. | |
115 | */ | |
87307113 | 116 | mp = trans->t_mountp; |
48ea6cb9 DC |
117 | tres.tr_logres = trans->t_log_res; |
118 | tres.tr_logcount = trans->t_log_count; | |
68f7f684 | 119 | old_blk_res = trans->t_blk_res; |
4329aa4c DC |
120 | |
121 | /* | |
122 | * Commit the current transaction. | |
123 | * If this commit failed, then it'd just unlock those items that | |
260c85e8 | 124 | * are marked to be released. That also means that a filesystem shutdown |
4329aa4c DC |
125 | * is in progress. The caller takes the responsibility to cancel |
126 | * the duplicate transaction that gets returned. | |
127 | */ | |
de5a3f46 | 128 | error = xfs_trans_commit(trans); |
4329aa4c | 129 | if (error) |
af43ca9f | 130 | return error; |
4329aa4c | 131 | |
4329aa4c | 132 | /* |
d67406c9 | 133 | * Reserve space in the log for the next transaction. |
4329aa4c DC |
134 | * This also pushes items in the "AIL", the list of logged items, |
135 | * out to disk if they are taking up space at the tail of the log | |
136 | * that we want to use. This requires that either nothing be locked | |
137 | * across this call, or that anything that is locked be logged in | |
138 | * the prior and the next transactions. | |
139 | */ | |
48ea6cb9 | 140 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
87307113 | 141 | error = libxfs_trans_alloc(mp, &tres, 0, 0, 0, tpp); |
9074815c | 142 | trans = *tpp; |
68f7f684 DW |
143 | trans->t_blk_res = old_blk_res; |
144 | ||
4329aa4c DC |
145 | return 0; |
146 | } | |
147 | ||
67d72279 ES |
148 | /* |
149 | * Free the transaction structure. If there is more clean up | |
150 | * to do when the structure is freed, add it here. | |
151 | */ | |
152 | static void | |
153 | xfs_trans_free( | |
154 | struct xfs_trans *tp) | |
155 | { | |
156 | kmem_zone_free(xfs_trans_zone, tp); | |
157 | } | |
158 | ||
9074815c | 159 | int |
ad10fb70 | 160 | libxfs_trans_alloc( |
9074815c CH |
161 | struct xfs_mount *mp, |
162 | struct xfs_trans_res *resp, | |
163 | unsigned int blocks, | |
164 | unsigned int rtextents, | |
165 | unsigned int flags, | |
166 | struct xfs_trans **tpp) | |
167 | ||
2bd0ea18 | 168 | { |
9074815c CH |
169 | struct xfs_sb *sb = &mp->m_sb; |
170 | struct xfs_trans *ptr; | |
171 | ||
172 | /* | |
173 | * Attempt to reserve the needed disk blocks by decrementing | |
174 | * the number needed from the number available. This will | |
175 | * fail if the count would go below zero. | |
176 | */ | |
177 | if (blocks > 0) { | |
178 | if (sb->sb_fdblocks < blocks) | |
179 | return -ENOSPC; | |
180 | } | |
2bd0ea18 | 181 | |
67d72279 ES |
182 | ptr = kmem_zone_zalloc(xfs_trans_zone, |
183 | (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); | |
2bd0ea18 | 184 | ptr->t_mountp = mp; |
68f7f684 | 185 | ptr->t_blk_res = blocks; |
c40bdaa2 | 186 | INIT_LIST_HEAD(&ptr->t_items); |
2bd0ea18 NS |
187 | #ifdef XACT_DEBUG |
188 | fprintf(stderr, "allocated new transaction %p\n", ptr); | |
2bd0ea18 | 189 | #endif |
9074815c | 190 | *tpp = ptr; |
2bd0ea18 NS |
191 | return 0; |
192 | } | |
193 | ||
d4e8eb2e DW |
194 | /* |
195 | * Create an empty transaction with no reservation. This is a defensive | |
196 | * mechanism for routines that query metadata without actually modifying | |
197 | * them -- if the metadata being queried is somehow cross-linked (think a | |
198 | * btree block pointer that points higher in the tree), we risk deadlock. | |
199 | * However, blocks grabbed as part of a transaction can be re-grabbed. | |
200 | * The verifiers will notice the corrupt block and the operation will fail | |
201 | * back to userspace without deadlocking. | |
202 | * | |
203 | * Note the zero-length reservation; this transaction MUST be cancelled | |
204 | * without any dirty data. | |
205 | */ | |
206 | int | |
3680a764 | 207 | libxfs_trans_alloc_empty( |
d4e8eb2e DW |
208 | struct xfs_mount *mp, |
209 | struct xfs_trans **tpp) | |
210 | { | |
211 | struct xfs_trans_res resv = {0}; | |
212 | ||
213 | return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp); | |
214 | } | |
215 | ||
2bd0ea18 | 216 | void |
ad10fb70 | 217 | libxfs_trans_cancel( |
3d7434fe | 218 | xfs_trans_t *tp) |
2bd0ea18 NS |
219 | { |
220 | #ifdef XACT_DEBUG | |
ad10fb70 | 221 | xfs_trans_t *otp = tp; |
2bd0ea18 NS |
222 | #endif |
223 | if (tp != NULL) { | |
7bcb8403 | 224 | xfs_trans_free_items(tp); |
67d72279 | 225 | xfs_trans_free(tp); |
2bd0ea18 NS |
226 | } |
227 | #ifdef XACT_DEBUG | |
228 | fprintf(stderr, "## cancelled transaction %p\n", otp); | |
229 | #endif | |
230 | } | |
231 | ||
232 | int | |
ad10fb70 NS |
233 | libxfs_trans_iget( |
234 | xfs_mount_t *mp, | |
235 | xfs_trans_t *tp, | |
236 | xfs_ino_t ino, | |
46eca962 | 237 | uint flags, |
ad10fb70 NS |
238 | uint lock_flags, |
239 | xfs_inode_t **ipp) | |
2bd0ea18 NS |
240 | { |
241 | int error; | |
242 | xfs_inode_t *ip; | |
243 | xfs_inode_log_item_t *iip; | |
244 | ||
245 | if (tp == NULL) | |
12ac6e04 DW |
246 | return libxfs_iget(mp, tp, ino, lock_flags, ipp, |
247 | &xfs_default_ifork_ops); | |
2bd0ea18 | 248 | |
12ac6e04 DW |
249 | error = libxfs_iget(mp, tp, ino, lock_flags, &ip, |
250 | &xfs_default_ifork_ops); | |
2bd0ea18 NS |
251 | if (error) |
252 | return error; | |
253 | ASSERT(ip != NULL); | |
254 | ||
255 | if (ip->i_itemp == NULL) | |
256 | xfs_inode_item_init(ip, mp); | |
257 | iip = ip->i_itemp; | |
258 | xfs_trans_add_item(tp, (xfs_log_item_t *)(iip)); | |
259 | ||
260 | /* initialize i_transp so we can find it incore */ | |
261 | ip->i_transp = tp; | |
262 | ||
263 | *ipp = ip; | |
264 | return 0; | |
265 | } | |
266 | ||
2bd0ea18 | 267 | void |
ad10fb70 NS |
268 | libxfs_trans_ijoin( |
269 | xfs_trans_t *tp, | |
270 | xfs_inode_t *ip, | |
271 | uint lock_flags) | |
2bd0ea18 NS |
272 | { |
273 | xfs_inode_log_item_t *iip; | |
274 | ||
275 | ASSERT(ip->i_transp == NULL); | |
276 | if (ip->i_itemp == NULL) | |
277 | xfs_inode_item_init(ip, ip->i_mount); | |
278 | iip = ip->i_itemp; | |
279 | ASSERT(iip->ili_flags == 0); | |
280 | ASSERT(iip->ili_inode != NULL); | |
281 | ||
282 | xfs_trans_add_item(tp, (xfs_log_item_t *)(iip)); | |
283 | ||
284 | ip->i_transp = tp; | |
285 | #ifdef XACT_DEBUG | |
286 | fprintf(stderr, "ijoin'd inode %llu, transaction %p\n", ip->i_ino, tp); | |
287 | #endif | |
288 | } | |
289 | ||
c40bdaa2 DC |
290 | void |
291 | libxfs_trans_ijoin_ref( | |
292 | xfs_trans_t *tp, | |
293 | xfs_inode_t *ip, | |
294 | int lock_flags) | |
295 | { | |
296 | ASSERT(ip->i_transp == tp); | |
297 | ASSERT(ip->i_itemp != NULL); | |
298 | ||
299 | xfs_trans_ijoin(tp, ip, lock_flags); | |
c40bdaa2 DC |
300 | |
301 | #ifdef XACT_DEBUG | |
302 | fprintf(stderr, "ijoin_ref'd inode %llu, transaction %p\n", ip->i_ino, tp); | |
303 | #endif | |
304 | } | |
305 | ||
2bd0ea18 | 306 | void |
ad10fb70 NS |
307 | libxfs_trans_inode_alloc_buf( |
308 | xfs_trans_t *tp, | |
309 | xfs_buf_t *bp) | |
2bd0ea18 | 310 | { |
37d086ca | 311 | xfs_buf_log_item_t *bip = bp->b_log_item; |
2bd0ea18 | 312 | |
cfc06b60 | 313 | ASSERT(bp->bp_transp == tp); |
38d096b6 | 314 | ASSERT(bip != NULL); |
2bd0ea18 | 315 | bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF; |
bdc16ee5 | 316 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF); |
2bd0ea18 NS |
317 | } |
318 | ||
319 | /* | |
320 | * This is called to mark the fields indicated in fieldmask as needing | |
321 | * to be logged when the transaction is committed. The inode must | |
322 | * already be associated with the given transaction. | |
323 | * | |
2d4bfb91 | 324 | * The values for fieldmask are defined in xfs_log_format.h. We always |
2bd0ea18 NS |
325 | * log all of the core inode if any of it has changed, and we always log |
326 | * all of the inline data/extents/b-tree root if any of them has changed. | |
327 | */ | |
328 | void | |
329 | xfs_trans_log_inode( | |
ad10fb70 NS |
330 | xfs_trans_t *tp, |
331 | xfs_inode_t *ip, | |
332 | uint flags) | |
2bd0ea18 | 333 | { |
2bd0ea18 NS |
334 | ASSERT(ip->i_transp == tp); |
335 | ASSERT(ip->i_itemp != NULL); | |
336 | #ifdef XACT_DEBUG | |
337 | fprintf(stderr, "dirtied inode %llu, transaction %p\n", ip->i_ino, tp); | |
338 | #endif | |
339 | ||
2bd0ea18 | 340 | tp->t_flags |= XFS_TRANS_DIRTY; |
c40bdaa2 | 341 | ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY; |
2bd0ea18 NS |
342 | |
343 | /* | |
344 | * Always OR in the bits from the ili_last_fields field. | |
345 | * This is to coordinate with the xfs_iflush() and xfs_iflush_done() | |
346 | * routines in the eventual clearing of the ilf_fields bits. | |
347 | * See the big comment in xfs_iflush() for an explanation of | |
348 | * this coordination mechanism. | |
349 | */ | |
350 | flags |= ip->i_itemp->ili_last_fields; | |
a2ceac1f | 351 | ip->i_itemp->ili_fields |= flags; |
2bd0ea18 NS |
352 | } |
353 | ||
d67406c9 CH |
354 | int |
355 | libxfs_trans_roll_inode( | |
356 | struct xfs_trans **tpp, | |
357 | struct xfs_inode *ip) | |
358 | { | |
359 | int error; | |
360 | ||
361 | xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE); | |
362 | error = xfs_trans_roll(tpp); | |
363 | if (!error) | |
364 | xfs_trans_ijoin(*tpp, ip, 0); | |
365 | return error; | |
366 | } | |
367 | ||
368 | ||
59630067 BF |
369 | /* |
370 | * Mark a buffer dirty in the transaction. | |
371 | */ | |
372 | void | |
373 | libxfs_trans_dirty_buf( | |
374 | struct xfs_trans *tp, | |
375 | struct xfs_buf *bp) | |
376 | { | |
37d086ca | 377 | struct xfs_buf_log_item *bip = bp->b_log_item; |
59630067 | 378 | |
cfc06b60 | 379 | ASSERT(bp->bp_transp == tp); |
38d096b6 | 380 | ASSERT(bip != NULL); |
59630067 | 381 | |
59630067 BF |
382 | #ifdef XACT_DEBUG |
383 | fprintf(stderr, "dirtied buffer %p, transaction %p\n", bp, tp); | |
384 | #endif | |
385 | tp->t_flags |= XFS_TRANS_DIRTY; | |
386 | bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY; | |
387 | } | |
388 | ||
2bd0ea18 NS |
389 | /* |
390 | * This is called to mark bytes first through last inclusive of the given | |
391 | * buffer as needing to be logged when the transaction is committed. | |
392 | * The buffer must already be associated with the given transaction. | |
5000d01d | 393 | * |
2bd0ea18 NS |
394 | * First and last are numbers relative to the beginning of this buffer, |
395 | * so the first byte in the buffer is numbered 0 regardless of the | |
396 | * value of b_blkno. | |
397 | */ | |
398 | void | |
ad10fb70 | 399 | libxfs_trans_log_buf( |
59630067 BF |
400 | struct xfs_trans *tp, |
401 | struct xfs_buf *bp, | |
ad10fb70 NS |
402 | uint first, |
403 | uint last) | |
2bd0ea18 | 404 | { |
37d086ca | 405 | struct xfs_buf_log_item *bip = bp->b_log_item; |
2bd0ea18 | 406 | |
2bd0ea18 | 407 | ASSERT((first <= last) && (last < XFS_BUF_COUNT(bp))); |
2bd0ea18 | 408 | |
59630067 | 409 | xfs_trans_dirty_buf(tp, bp); |
2bd0ea18 NS |
410 | xfs_buf_item_log(bip, first, last); |
411 | } | |
412 | ||
38fa71a7 BF |
413 | /* |
414 | * For userspace, ordered buffers just need to be marked dirty so | |
415 | * the transaction commit will write them and mark them up-to-date. | |
416 | * In essence, they are just like any other logged buffer in userspace. | |
417 | * | |
418 | * If the buffer is already dirty, trigger the "already logged" return condition. | |
419 | */ | |
420 | bool | |
421 | libxfs_trans_ordered_buf( | |
422 | struct xfs_trans *tp, | |
423 | struct xfs_buf *bp) | |
424 | { | |
37d086ca | 425 | struct xfs_buf_log_item *bip = bp->b_log_item; |
38fa71a7 BF |
426 | bool ret; |
427 | ||
428 | ret = (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY); | |
429 | libxfs_trans_log_buf(tp, bp, 0, bp->b_bcount); | |
430 | return ret; | |
431 | } | |
432 | ||
2bd0ea18 | 433 | void |
ad10fb70 NS |
434 | libxfs_trans_brelse( |
435 | xfs_trans_t *tp, | |
436 | xfs_buf_t *bp) | |
2bd0ea18 NS |
437 | { |
438 | xfs_buf_log_item_t *bip; | |
2bd0ea18 NS |
439 | #ifdef XACT_DEBUG |
440 | fprintf(stderr, "released buffer %p, transaction %p\n", bp, tp); | |
441 | #endif | |
442 | ||
443 | if (tp == NULL) { | |
cfc06b60 | 444 | ASSERT(bp->bp_transp == NULL); |
2bd0ea18 NS |
445 | libxfs_putbuf(bp); |
446 | return; | |
447 | } | |
cfc06b60 | 448 | ASSERT(bp->bp_transp == tp); |
37d086ca | 449 | bip = bp->b_log_item; |
2bd0ea18 | 450 | ASSERT(bip->bli_item.li_type == XFS_LI_BUF); |
2bd0ea18 NS |
451 | if (bip->bli_recur > 0) { |
452 | bip->bli_recur--; | |
453 | return; | |
454 | } | |
f1b058f9 NS |
455 | /* If dirty/stale, can't release till transaction committed */ |
456 | if (bip->bli_flags & XFS_BLI_STALE) | |
457 | return; | |
c40bdaa2 | 458 | if (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY) |
2bd0ea18 | 459 | return; |
c40bdaa2 | 460 | xfs_trans_del_item(&bip->bli_item); |
f1b058f9 | 461 | if (bip->bli_flags & XFS_BLI_HOLD) |
2bd0ea18 | 462 | bip->bli_flags &= ~XFS_BLI_HOLD; |
cfc06b60 | 463 | bp->b_transp = NULL; |
2bd0ea18 NS |
464 | libxfs_putbuf(bp); |
465 | } | |
466 | ||
467 | void | |
ad10fb70 NS |
468 | libxfs_trans_binval( |
469 | xfs_trans_t *tp, | |
470 | xfs_buf_t *bp) | |
2bd0ea18 | 471 | { |
37d086ca | 472 | xfs_buf_log_item_t *bip = bp->b_log_item; |
2bd0ea18 NS |
473 | #ifdef XACT_DEBUG |
474 | fprintf(stderr, "binval'd buffer %p, transaction %p\n", bp, tp); | |
475 | #endif | |
476 | ||
cfc06b60 | 477 | ASSERT(bp->bp_transp == tp); |
38d096b6 | 478 | ASSERT(bip != NULL); |
2bd0ea18 | 479 | |
f1b058f9 NS |
480 | if (bip->bli_flags & XFS_BLI_STALE) |
481 | return; | |
482 | XFS_BUF_UNDELAYWRITE(bp); | |
a2ceac1f | 483 | xfs_buf_stale(bp); |
f1b058f9 NS |
484 | bip->bli_flags |= XFS_BLI_STALE; |
485 | bip->bli_flags &= ~XFS_BLI_DIRTY; | |
c40bdaa2 DC |
486 | bip->bli_format.blf_flags &= ~XFS_BLF_INODE_BUF; |
487 | bip->bli_format.blf_flags |= XFS_BLF_CANCEL; | |
488 | bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY; | |
2bd0ea18 NS |
489 | tp->t_flags |= XFS_TRANS_DIRTY; |
490 | } | |
491 | ||
492 | void | |
ad10fb70 NS |
493 | libxfs_trans_bjoin( |
494 | xfs_trans_t *tp, | |
495 | xfs_buf_t *bp) | |
2bd0ea18 NS |
496 | { |
497 | xfs_buf_log_item_t *bip; | |
498 | ||
cfc06b60 | 499 | ASSERT(bp->bp_transp == NULL); |
2bd0ea18 NS |
500 | #ifdef XACT_DEBUG |
501 | fprintf(stderr, "bjoin'd buffer %p, transaction %p\n", bp, tp); | |
502 | #endif | |
503 | ||
504 | xfs_buf_item_init(bp, tp->t_mountp); | |
37d086ca | 505 | bip = bp->b_log_item; |
2bd0ea18 | 506 | xfs_trans_add_item(tp, (xfs_log_item_t *)bip); |
cfc06b60 | 507 | bp->b_transp = tp; |
2bd0ea18 NS |
508 | } |
509 | ||
510 | void | |
ad10fb70 NS |
511 | libxfs_trans_bhold( |
512 | xfs_trans_t *tp, | |
513 | xfs_buf_t *bp) | |
2bd0ea18 | 514 | { |
37d086ca | 515 | xfs_buf_log_item_t *bip = bp->b_log_item; |
2bd0ea18 | 516 | |
cfc06b60 | 517 | ASSERT(bp->bp_transp == tp); |
37d086ca | 518 | ASSERT(bip != NULL); |
2bd0ea18 NS |
519 | #ifdef XACT_DEBUG |
520 | fprintf(stderr, "bhold'd buffer %p, transaction %p\n", bp, tp); | |
521 | #endif | |
522 | ||
2bd0ea18 NS |
523 | bip->bli_flags |= XFS_BLI_HOLD; |
524 | } | |
525 | ||
526 | xfs_buf_t * | |
a2ceac1f | 527 | libxfs_trans_get_buf_map( |
ad10fb70 | 528 | xfs_trans_t *tp, |
75c8b434 | 529 | struct xfs_buftarg *btp, |
a2ceac1f DC |
530 | struct xfs_buf_map *map, |
531 | int nmaps, | |
ad10fb70 | 532 | uint f) |
2bd0ea18 NS |
533 | { |
534 | xfs_buf_t *bp; | |
535 | xfs_buf_log_item_t *bip; | |
2bd0ea18 NS |
536 | |
537 | if (tp == NULL) | |
7e3ab890 | 538 | return libxfs_getbuf_map(btp, map, nmaps, 0); |
2bd0ea18 | 539 | |
75c8b434 | 540 | bp = xfs_trans_buf_item_match(tp, btp, map, nmaps); |
2bd0ea18 | 541 | if (bp != NULL) { |
cfc06b60 | 542 | ASSERT(bp->bp_transp == tp); |
37d086ca | 543 | bip = bp->b_log_item; |
2bd0ea18 NS |
544 | ASSERT(bip != NULL); |
545 | bip->bli_recur++; | |
546 | return bp; | |
547 | } | |
548 | ||
7e3ab890 | 549 | bp = libxfs_getbuf_map(btp, map, nmaps, 0); |
2bd0ea18 NS |
550 | if (bp == NULL) |
551 | return NULL; | |
552 | #ifdef XACT_DEBUG | |
553 | fprintf(stderr, "trans_get_buf buffer %p, transaction %p\n", bp, tp); | |
554 | #endif | |
555 | ||
556 | xfs_buf_item_init(bp, tp->t_mountp); | |
37d086ca | 557 | bip = bp->b_log_item; |
2bd0ea18 NS |
558 | bip->bli_recur = 0; |
559 | xfs_trans_add_item(tp, (xfs_log_item_t *)bip); | |
560 | ||
cfc06b60 CH |
561 | /* initialize b_transp so we can find it incore */ |
562 | bp->b_transp = tp; | |
2bd0ea18 NS |
563 | return bp; |
564 | } | |
565 | ||
f1b058f9 NS |
566 | xfs_buf_t * |
567 | libxfs_trans_getsb( | |
568 | xfs_trans_t *tp, | |
569 | xfs_mount_t *mp, | |
570 | int flags) | |
571 | { | |
572 | xfs_buf_t *bp; | |
573 | xfs_buf_log_item_t *bip; | |
a2ceac1f DC |
574 | int len = XFS_FSS_TO_BB(mp, 1); |
575 | DEFINE_SINGLE_BUF_MAP(map, XFS_SB_DADDR, len); | |
f1b058f9 NS |
576 | |
577 | if (tp == NULL) | |
578 | return libxfs_getsb(mp, flags); | |
579 | ||
a2ceac1f | 580 | bp = xfs_trans_buf_item_match(tp, mp->m_dev, &map, 1); |
f1b058f9 | 581 | if (bp != NULL) { |
cfc06b60 | 582 | ASSERT(bp->bp_transp == tp); |
37d086ca | 583 | bip = bp->b_log_item; |
f1b058f9 NS |
584 | ASSERT(bip != NULL); |
585 | bip->bli_recur++; | |
586 | return bp; | |
587 | } | |
588 | ||
589 | bp = libxfs_getsb(mp, flags); | |
590 | #ifdef XACT_DEBUG | |
591 | fprintf(stderr, "trans_get_sb buffer %p, transaction %p\n", bp, tp); | |
592 | #endif | |
593 | ||
594 | xfs_buf_item_init(bp, mp); | |
37d086ca | 595 | bip = bp->b_log_item; |
f1b058f9 NS |
596 | bip->bli_recur = 0; |
597 | xfs_trans_add_item(tp, (xfs_log_item_t *)bip); | |
598 | ||
cfc06b60 CH |
599 | /* initialize b_transp so we can find it incore */ |
600 | bp->b_transp = tp; | |
f1b058f9 NS |
601 | return bp; |
602 | } | |
603 | ||
2bd0ea18 | 604 | int |
a2ceac1f | 605 | libxfs_trans_read_buf_map( |
ad10fb70 NS |
606 | xfs_mount_t *mp, |
607 | xfs_trans_t *tp, | |
75c8b434 | 608 | struct xfs_buftarg *btp, |
a2ceac1f DC |
609 | struct xfs_buf_map *map, |
610 | int nmaps, | |
f1b058f9 | 611 | uint flags, |
a2ceac1f DC |
612 | xfs_buf_t **bpp, |
613 | const struct xfs_buf_ops *ops) | |
2bd0ea18 NS |
614 | { |
615 | xfs_buf_t *bp; | |
616 | xfs_buf_log_item_t *bip; | |
a6a7776a | 617 | int error; |
2bd0ea18 | 618 | |
00aea09f CH |
619 | *bpp = NULL; |
620 | ||
2bd0ea18 | 621 | if (tp == NULL) { |
75c8b434 | 622 | bp = libxfs_readbuf_map(btp, map, nmaps, flags, ops); |
00aea09f | 623 | if (!bp) { |
12b53197 | 624 | return (flags & XBF_TRYLOCK) ? -EAGAIN : -ENOMEM; |
00aea09f | 625 | } |
a6a7776a CH |
626 | if (bp->b_error) |
627 | goto out_relse; | |
00aea09f | 628 | goto done; |
2bd0ea18 NS |
629 | } |
630 | ||
75c8b434 | 631 | bp = xfs_trans_buf_item_match(tp, btp, map, nmaps); |
2bd0ea18 | 632 | if (bp != NULL) { |
cfc06b60 | 633 | ASSERT(bp->bp_transp == tp); |
37d086ca CM |
634 | ASSERT(bp->b_log_item != NULL); |
635 | bip = bp->b_log_item; | |
2bd0ea18 | 636 | bip->bli_recur++; |
00aea09f | 637 | goto done; |
2bd0ea18 NS |
638 | } |
639 | ||
75c8b434 | 640 | bp = libxfs_readbuf_map(btp, map, nmaps, flags, ops); |
00aea09f | 641 | if (!bp) { |
12b53197 | 642 | return (flags & XBF_TRYLOCK) ? -EAGAIN : -ENOMEM; |
00aea09f | 643 | } |
a6a7776a CH |
644 | if (bp->b_error) |
645 | goto out_relse; | |
00aea09f | 646 | |
2bd0ea18 NS |
647 | #ifdef XACT_DEBUG |
648 | fprintf(stderr, "trans_read_buf buffer %p, transaction %p\n", bp, tp); | |
649 | #endif | |
650 | ||
651 | xfs_buf_item_init(bp, tp->t_mountp); | |
37d086ca | 652 | bip = bp->b_log_item; |
2bd0ea18 NS |
653 | bip->bli_recur = 0; |
654 | xfs_trans_add_item(tp, (xfs_log_item_t *)bip); | |
655 | ||
cfc06b60 CH |
656 | /* initialise b_transp so we can find it incore */ |
657 | bp->b_transp = tp; | |
00aea09f | 658 | done: |
2bd0ea18 NS |
659 | *bpp = bp; |
660 | return 0; | |
a6a7776a CH |
661 | out_relse: |
662 | error = bp->b_error; | |
663 | xfs_buf_relse(bp); | |
664 | return error; | |
2bd0ea18 NS |
665 | } |
666 | ||
667 | /* | |
668 | * Record the indicated change to the given field for application | |
669 | * to the file system's superblock when the transaction commits. | |
670 | * For now, just store the change in the transaction structure. | |
671 | * Mark the transaction structure to indicate that the superblock | |
5000d01d | 672 | * needs to be updated before committing. |
2bd0ea18 NS |
673 | * |
674 | * Originally derived from xfs_trans_mod_sb(). | |
675 | */ | |
676 | void | |
ad10fb70 NS |
677 | libxfs_trans_mod_sb( |
678 | xfs_trans_t *tp, | |
679 | uint field, | |
680 | long delta) | |
2bd0ea18 NS |
681 | { |
682 | switch (field) { | |
683 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
684 | return; | |
685 | case XFS_TRANS_SB_FDBLOCKS: | |
686 | tp->t_fdblocks_delta += delta; | |
687 | break; | |
688 | case XFS_TRANS_SB_ICOUNT: | |
689 | ASSERT(delta > 0); | |
690 | tp->t_icount_delta += delta; | |
691 | break; | |
692 | case XFS_TRANS_SB_IFREE: | |
693 | tp->t_ifree_delta += delta; | |
694 | break; | |
695 | case XFS_TRANS_SB_FREXTENTS: | |
696 | tp->t_frextents_delta += delta; | |
697 | break; | |
698 | default: | |
699 | ASSERT(0); | |
700 | return; | |
701 | } | |
702 | tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY); | |
703 | } | |
704 | ||
705 | ||
706 | /* | |
707 | * Transaction commital code follows (i.e. write to disk in libxfs) | |
708 | */ | |
709 | ||
5e656dbb | 710 | static void |
ad10fb70 NS |
711 | inode_item_done( |
712 | xfs_inode_log_item_t *iip) | |
2bd0ea18 | 713 | { |
ad10fb70 NS |
714 | xfs_dinode_t *dip; |
715 | xfs_inode_t *ip; | |
716 | xfs_mount_t *mp; | |
717 | xfs_buf_t *bp; | |
ad10fb70 | 718 | int error; |
2bd0ea18 NS |
719 | |
720 | ip = iip->ili_inode; | |
721 | mp = iip->ili_item.li_mountp; | |
2bd0ea18 NS |
722 | ASSERT(ip != NULL); |
723 | ||
a2ceac1f | 724 | if (!(iip->ili_fields & XFS_ILOG_ALL)) { |
2bd0ea18 NS |
725 | ip->i_transp = NULL; /* disassociate from transaction */ |
726 | iip->ili_flags = 0; /* reset all flags */ | |
260c85e8 | 727 | return; |
2bd0ea18 NS |
728 | } |
729 | ||
730 | /* | |
731 | * Get the buffer containing the on-disk inode. | |
732 | */ | |
a2ceac1f | 733 | error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, 0, 0); |
2bd0ea18 | 734 | if (error) { |
a2ceac1f | 735 | fprintf(stderr, _("%s: warning - imap_to_bp failed (%d)\n"), |
2bd0ea18 | 736 | progname, error); |
260c85e8 | 737 | return; |
2bd0ea18 NS |
738 | } |
739 | ||
37d086ca | 740 | bp->b_log_item = iip; |
2bd0ea18 NS |
741 | error = libxfs_iflush_int(ip, bp); |
742 | if (error) { | |
9440d84d | 743 | fprintf(stderr, _("%s: warning - iflush_int failed (%d)\n"), |
2bd0ea18 | 744 | progname, error); |
260c85e8 | 745 | return; |
2bd0ea18 NS |
746 | } |
747 | ||
748 | ip->i_transp = NULL; /* disassociate from transaction */ | |
37d086ca | 749 | bp->b_log_item = NULL; /* remove log item */ |
cfc06b60 | 750 | bp->b_transp = NULL; /* remove xact ptr */ |
f1b058f9 | 751 | libxfs_writebuf(bp, 0); |
2bd0ea18 | 752 | #ifdef XACT_DEBUG |
260c85e8 MT |
753 | fprintf(stderr, "flushing dirty inode %llu, buffer %p\n", |
754 | ip->i_ino, bp); | |
2bd0ea18 | 755 | #endif |
2bd0ea18 NS |
756 | } |
757 | ||
5e656dbb | 758 | static void |
ad10fb70 NS |
759 | buf_item_done( |
760 | xfs_buf_log_item_t *bip) | |
2bd0ea18 | 761 | { |
ad10fb70 NS |
762 | xfs_buf_t *bp; |
763 | int hold; | |
5e656dbb | 764 | extern kmem_zone_t *xfs_buf_item_zone; |
2bd0ea18 NS |
765 | |
766 | bp = bip->bli_buf; | |
767 | ASSERT(bp != NULL); | |
37d086ca | 768 | bp->b_log_item = NULL; /* remove log item */ |
cfc06b60 | 769 | bp->b_transp = NULL; /* remove xact ptr */ |
2bd0ea18 NS |
770 | |
771 | hold = (bip->bli_flags & XFS_BLI_HOLD); | |
2556c98b | 772 | if (bip->bli_flags & XFS_BLI_DIRTY) { |
2bd0ea18 | 773 | #ifdef XACT_DEBUG |
f1b058f9 | 774 | fprintf(stderr, "flushing/staling buffer %p (hold=%d)\n", |
2bd0ea18 NS |
775 | bp, hold); |
776 | #endif | |
2556c98b | 777 | libxfs_writebuf_int(bp, 0); |
2bd0ea18 | 778 | } |
2556c98b BN |
779 | if (hold) |
780 | bip->bli_flags &= ~XFS_BLI_HOLD; | |
781 | else | |
782 | libxfs_putbuf(bp); | |
2bd0ea18 NS |
783 | /* release the buf item */ |
784 | kmem_zone_free(xfs_buf_item_zone, bip); | |
785 | } | |
786 | ||
2bd0ea18 | 787 | static void |
c40bdaa2 DC |
788 | trans_committed( |
789 | xfs_trans_t *tp) | |
2bd0ea18 | 790 | { |
c40bdaa2 DC |
791 | struct xfs_log_item_desc *lidp, *next; |
792 | ||
793 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
794 | struct xfs_log_item *lip = lidp->lid_item; | |
795 | ||
68f7f684 | 796 | xfs_trans_del_item(lip); |
a2ceac1f | 797 | |
2bd0ea18 | 798 | if (lip->li_type == XFS_LI_BUF) |
c40bdaa2 | 799 | buf_item_done((xfs_buf_log_item_t *)lip); |
2bd0ea18 | 800 | else if (lip->li_type == XFS_LI_INODE) |
c40bdaa2 | 801 | inode_item_done((xfs_inode_log_item_t *)lip); |
2bd0ea18 | 802 | else { |
9440d84d | 803 | fprintf(stderr, _("%s: unrecognised log item type\n"), |
2bd0ea18 NS |
804 | progname); |
805 | ASSERT(0); | |
806 | } | |
c40bdaa2 | 807 | } |
2bd0ea18 NS |
808 | } |
809 | ||
5e656dbb | 810 | static void |
1bab604b NS |
811 | buf_item_unlock( |
812 | xfs_buf_log_item_t *bip) | |
813 | { | |
814 | xfs_buf_t *bp = bip->bli_buf; | |
815 | uint hold; | |
816 | ||
817 | /* Clear the buffer's association with this transaction. */ | |
cfc06b60 | 818 | bip->bli_buf->b_transp = NULL; |
1bab604b NS |
819 | |
820 | hold = bip->bli_flags & XFS_BLI_HOLD; | |
c40bdaa2 | 821 | bip->bli_flags &= ~XFS_BLI_HOLD; |
1bab604b NS |
822 | if (!hold) |
823 | libxfs_putbuf(bp); | |
1bab604b NS |
824 | } |
825 | ||
5e656dbb | 826 | static void |
1bab604b NS |
827 | inode_item_unlock( |
828 | xfs_inode_log_item_t *iip) | |
829 | { | |
830 | xfs_inode_t *ip = iip->ili_inode; | |
1bab604b NS |
831 | |
832 | /* Clear the transaction pointer in the inode. */ | |
833 | ip->i_transp = NULL; | |
834 | ||
1bab604b NS |
835 | iip->ili_flags = 0; |
836 | } | |
837 | ||
2bd0ea18 | 838 | /* |
c40bdaa2 DC |
839 | * Unlock all of the items of a transaction and free all the descriptors |
840 | * of that transaction. | |
2bd0ea18 | 841 | */ |
7bcb8403 | 842 | static void |
c40bdaa2 | 843 | xfs_trans_free_items( |
7bcb8403 | 844 | struct xfs_trans *tp) |
2bd0ea18 | 845 | { |
c40bdaa2 | 846 | struct xfs_log_item_desc *lidp, *next; |
2bd0ea18 | 847 | |
c40bdaa2 DC |
848 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { |
849 | struct xfs_log_item *lip = lidp->lid_item; | |
850 | ||
851 | xfs_trans_del_item(lip); | |
1bab604b | 852 | if (lip->li_type == XFS_LI_BUF) |
c40bdaa2 | 853 | buf_item_unlock((xfs_buf_log_item_t *)lip); |
1bab604b | 854 | else if (lip->li_type == XFS_LI_INODE) |
c40bdaa2 | 855 | inode_item_unlock((xfs_inode_log_item_t *)lip); |
2bd0ea18 | 856 | else { |
9440d84d | 857 | fprintf(stderr, _("%s: unrecognised log item type\n"), |
2bd0ea18 NS |
858 | progname); |
859 | ASSERT(0); | |
860 | } | |
2bd0ea18 | 861 | } |
2bd0ea18 NS |
862 | } |
863 | ||
2bd0ea18 NS |
864 | /* |
865 | * Commit the changes represented by this transaction | |
866 | */ | |
867 | int | |
ad10fb70 | 868 | libxfs_trans_commit( |
de5a3f46 | 869 | xfs_trans_t *tp) |
2bd0ea18 NS |
870 | { |
871 | xfs_sb_t *sbp; | |
2bd0ea18 NS |
872 | |
873 | if (tp == NULL) | |
874 | return 0; | |
875 | ||
876 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) { | |
877 | #ifdef XACT_DEBUG | |
878 | fprintf(stderr, "committed clean transaction %p\n", tp); | |
879 | #endif | |
7bcb8403 | 880 | xfs_trans_free_items(tp); |
67d72279 | 881 | xfs_trans_free(tp); |
2bd0ea18 NS |
882 | return 0; |
883 | } | |
884 | ||
885 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
886 | sbp = &(tp->t_mountp->m_sb); | |
887 | if (tp->t_icount_delta) | |
888 | sbp->sb_icount += tp->t_icount_delta; | |
889 | if (tp->t_ifree_delta) | |
890 | sbp->sb_ifree += tp->t_ifree_delta; | |
891 | if (tp->t_fdblocks_delta) | |
892 | sbp->sb_fdblocks += tp->t_fdblocks_delta; | |
893 | if (tp->t_frextents_delta) | |
894 | sbp->sb_frextents += tp->t_frextents_delta; | |
19ebedcf | 895 | xfs_log_sb(tp); |
2bd0ea18 NS |
896 | } |
897 | ||
898 | #ifdef XACT_DEBUG | |
899 | fprintf(stderr, "committing dirty transaction %p\n", tp); | |
900 | #endif | |
901 | trans_committed(tp); | |
902 | ||
903 | /* That's it for the transaction structure. Free it. */ | |
67d72279 | 904 | xfs_trans_free(tp); |
2bd0ea18 NS |
905 | return 0; |
906 | } |