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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | #include "xfs.h" | |
34 | #include "xfs_macros.h" | |
35 | #include "xfs_types.h" | |
36 | #include "xfs_inum.h" | |
37 | #include "xfs_log.h" | |
38 | #include "xfs_trans.h" | |
39 | #include "xfs_sb.h" | |
40 | #include "xfs_ag.h" | |
41 | #include "xfs_dir.h" | |
42 | #include "xfs_dir2.h" | |
43 | #include "xfs_dmapi.h" | |
44 | #include "xfs_mount.h" | |
45 | #include "xfs_error.h" | |
46 | #include "xfs_trans_priv.h" | |
47 | #include "xfs_alloc_btree.h" | |
48 | #include "xfs_bmap_btree.h" | |
49 | #include "xfs_ialloc_btree.h" | |
50 | #include "xfs_btree.h" | |
51 | #include "xfs_ialloc.h" | |
52 | #include "xfs_alloc.h" | |
53 | #include "xfs_attr_sf.h" | |
54 | #include "xfs_dir_sf.h" | |
55 | #include "xfs_dir2_sf.h" | |
56 | #include "xfs_dinode.h" | |
57 | #include "xfs_inode.h" | |
58 | #include "xfs_bmap.h" | |
59 | #include "xfs_da_btree.h" | |
60 | #include "xfs_quota.h" | |
61 | #include "xfs_trans_space.h" | |
62 | ||
63 | ||
64 | STATIC void xfs_trans_apply_sb_deltas(xfs_trans_t *); | |
65 | STATIC uint xfs_trans_count_vecs(xfs_trans_t *); | |
66 | STATIC void xfs_trans_fill_vecs(xfs_trans_t *, xfs_log_iovec_t *); | |
67 | STATIC void xfs_trans_uncommit(xfs_trans_t *, uint); | |
68 | STATIC void xfs_trans_committed(xfs_trans_t *, int); | |
69 | STATIC void xfs_trans_chunk_committed(xfs_log_item_chunk_t *, xfs_lsn_t, int); | |
70 | STATIC void xfs_trans_free(xfs_trans_t *); | |
71 | ||
72 | kmem_zone_t *xfs_trans_zone; | |
73 | ||
74 | ||
75 | /* | |
76 | * Initialize the precomputed transaction reservation values | |
77 | * in the mount structure. | |
78 | */ | |
79 | void | |
80 | xfs_trans_init( | |
81 | xfs_mount_t *mp) | |
82 | { | |
83 | xfs_trans_reservations_t *resp; | |
84 | ||
85 | resp = &(mp->m_reservations); | |
86 | resp->tr_write = | |
87 | (uint)(XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
88 | resp->tr_itruncate = | |
89 | (uint)(XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
90 | resp->tr_rename = | |
91 | (uint)(XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
92 | resp->tr_link = (uint)XFS_CALC_LINK_LOG_RES(mp); | |
93 | resp->tr_remove = | |
94 | (uint)(XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
95 | resp->tr_symlink = | |
96 | (uint)(XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
97 | resp->tr_create = | |
98 | (uint)(XFS_CALC_CREATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
99 | resp->tr_mkdir = | |
100 | (uint)(XFS_CALC_MKDIR_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
101 | resp->tr_ifree = | |
102 | (uint)(XFS_CALC_IFREE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
103 | resp->tr_ichange = | |
104 | (uint)(XFS_CALC_ICHANGE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
105 | resp->tr_growdata = (uint)XFS_CALC_GROWDATA_LOG_RES(mp); | |
106 | resp->tr_swrite = (uint)XFS_CALC_SWRITE_LOG_RES(mp); | |
107 | resp->tr_writeid = (uint)XFS_CALC_WRITEID_LOG_RES(mp); | |
108 | resp->tr_addafork = | |
109 | (uint)(XFS_CALC_ADDAFORK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
110 | resp->tr_attrinval = (uint)XFS_CALC_ATTRINVAL_LOG_RES(mp); | |
111 | resp->tr_attrset = | |
112 | (uint)(XFS_CALC_ATTRSET_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
113 | resp->tr_attrrm = | |
114 | (uint)(XFS_CALC_ATTRRM_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
115 | resp->tr_clearagi = (uint)XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp); | |
116 | resp->tr_growrtalloc = (uint)XFS_CALC_GROWRTALLOC_LOG_RES(mp); | |
117 | resp->tr_growrtzero = (uint)XFS_CALC_GROWRTZERO_LOG_RES(mp); | |
118 | resp->tr_growrtfree = (uint)XFS_CALC_GROWRTFREE_LOG_RES(mp); | |
119 | } | |
120 | ||
121 | /* | |
122 | * This routine is called to allocate a transaction structure. | |
123 | * The type parameter indicates the type of the transaction. These | |
124 | * are enumerated in xfs_trans.h. | |
125 | * | |
126 | * Dynamically allocate the transaction structure from the transaction | |
127 | * zone, initialize it, and return it to the caller. | |
128 | */ | |
129 | xfs_trans_t * | |
130 | xfs_trans_alloc( | |
131 | xfs_mount_t *mp, | |
132 | uint type) | |
133 | { | |
134 | fs_check_frozen(XFS_MTOVFS(mp), SB_FREEZE_TRANS); | |
135 | atomic_inc(&mp->m_active_trans); | |
136 | ||
137 | return (_xfs_trans_alloc(mp, type)); | |
138 | ||
139 | } | |
140 | ||
141 | xfs_trans_t * | |
142 | _xfs_trans_alloc( | |
143 | xfs_mount_t *mp, | |
144 | uint type) | |
145 | { | |
146 | xfs_trans_t *tp; | |
147 | ||
148 | ASSERT(xfs_trans_zone != NULL); | |
149 | tp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
150 | ||
151 | /* | |
152 | * Initialize the transaction structure. | |
153 | */ | |
154 | tp->t_magic = XFS_TRANS_MAGIC; | |
155 | tp->t_type = type; | |
156 | tp->t_mountp = mp; | |
157 | tp->t_items_free = XFS_LIC_NUM_SLOTS; | |
158 | tp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
159 | XFS_LIC_INIT(&(tp->t_items)); | |
160 | XFS_LBC_INIT(&(tp->t_busy)); | |
161 | ||
162 | return (tp); | |
163 | } | |
164 | ||
165 | /* | |
166 | * This is called to create a new transaction which will share the | |
167 | * permanent log reservation of the given transaction. The remaining | |
168 | * unused block and rt extent reservations are also inherited. This | |
169 | * implies that the original transaction is no longer allowed to allocate | |
170 | * blocks. Locks and log items, however, are no inherited. They must | |
171 | * be added to the new transaction explicitly. | |
172 | */ | |
173 | xfs_trans_t * | |
174 | xfs_trans_dup( | |
175 | xfs_trans_t *tp) | |
176 | { | |
177 | xfs_trans_t *ntp; | |
178 | ||
179 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
180 | ||
181 | /* | |
182 | * Initialize the new transaction structure. | |
183 | */ | |
184 | ntp->t_magic = XFS_TRANS_MAGIC; | |
185 | ntp->t_type = tp->t_type; | |
186 | ntp->t_mountp = tp->t_mountp; | |
187 | ntp->t_items_free = XFS_LIC_NUM_SLOTS; | |
188 | ntp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
189 | XFS_LIC_INIT(&(ntp->t_items)); | |
190 | XFS_LBC_INIT(&(ntp->t_busy)); | |
191 | ||
192 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
193 | ||
194 | #if defined(XLOG_NOLOG) || defined(DEBUG) | |
195 | ASSERT(!xlog_debug || tp->t_ticket != NULL); | |
196 | #else | |
197 | ASSERT(tp->t_ticket != NULL); | |
198 | #endif | |
199 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE); | |
200 | ntp->t_ticket = tp->t_ticket; | |
201 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; | |
202 | tp->t_blk_res = tp->t_blk_res_used; | |
203 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
204 | tp->t_rtx_res = tp->t_rtx_res_used; | |
205 | PFLAGS_DUP(&tp->t_pflags, &ntp->t_pflags); | |
206 | ||
207 | XFS_TRANS_DUP_DQINFO(tp->t_mountp, tp, ntp); | |
208 | ||
209 | atomic_inc(&tp->t_mountp->m_active_trans); | |
210 | return ntp; | |
211 | } | |
212 | ||
213 | /* | |
214 | * This is called to reserve free disk blocks and log space for the | |
215 | * given transaction. This must be done before allocating any resources | |
216 | * within the transaction. | |
217 | * | |
218 | * This will return ENOSPC if there are not enough blocks available. | |
219 | * It will sleep waiting for available log space. | |
220 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
221 | * is used by long running transactions. If any one of the reservations | |
222 | * fails then they will all be backed out. | |
223 | * | |
224 | * This does not do quota reservations. That typically is done by the | |
225 | * caller afterwards. | |
226 | */ | |
227 | int | |
228 | xfs_trans_reserve( | |
229 | xfs_trans_t *tp, | |
230 | uint blocks, | |
231 | uint logspace, | |
232 | uint rtextents, | |
233 | uint flags, | |
234 | uint logcount) | |
235 | { | |
236 | int log_flags; | |
237 | int error; | |
238 | int rsvd; | |
239 | ||
240 | error = 0; | |
241 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
242 | ||
243 | /* Mark this thread as being in a transaction */ | |
244 | PFLAGS_SET_FSTRANS(&tp->t_pflags); | |
245 | ||
246 | /* | |
247 | * Attempt to reserve the needed disk blocks by decrementing | |
248 | * the number needed from the number available. This will | |
249 | * fail if the count would go below zero. | |
250 | */ | |
251 | if (blocks > 0) { | |
252 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
253 | -blocks, rsvd); | |
254 | if (error != 0) { | |
255 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
256 | return (XFS_ERROR(ENOSPC)); | |
257 | } | |
258 | tp->t_blk_res += blocks; | |
259 | } | |
260 | ||
261 | /* | |
262 | * Reserve the log space needed for this transaction. | |
263 | */ | |
264 | if (logspace > 0) { | |
265 | ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace)); | |
266 | ASSERT((tp->t_log_count == 0) || | |
267 | (tp->t_log_count == logcount)); | |
268 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
269 | log_flags = XFS_LOG_PERM_RESERV; | |
270 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; | |
271 | } else { | |
272 | ASSERT(tp->t_ticket == NULL); | |
273 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
274 | log_flags = 0; | |
275 | } | |
276 | ||
277 | error = xfs_log_reserve(tp->t_mountp, logspace, logcount, | |
278 | &tp->t_ticket, | |
7e9c6396 | 279 | XFS_TRANSACTION, log_flags, tp->t_type); |
1da177e4 LT |
280 | if (error) { |
281 | goto undo_blocks; | |
282 | } | |
283 | tp->t_log_res = logspace; | |
284 | tp->t_log_count = logcount; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Attempt to reserve the needed realtime extents by decrementing | |
289 | * the number needed from the number available. This will | |
290 | * fail if the count would go below zero. | |
291 | */ | |
292 | if (rtextents > 0) { | |
293 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
294 | -rtextents, rsvd); | |
295 | if (error) { | |
296 | error = XFS_ERROR(ENOSPC); | |
297 | goto undo_log; | |
298 | } | |
299 | tp->t_rtx_res += rtextents; | |
300 | } | |
301 | ||
302 | return 0; | |
303 | ||
304 | /* | |
305 | * Error cases jump to one of these labels to undo any | |
306 | * reservations which have already been performed. | |
307 | */ | |
308 | undo_log: | |
309 | if (logspace > 0) { | |
310 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
311 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
312 | } else { | |
313 | log_flags = 0; | |
314 | } | |
315 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
316 | tp->t_ticket = NULL; | |
317 | tp->t_log_res = 0; | |
318 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
319 | } | |
320 | ||
321 | undo_blocks: | |
322 | if (blocks > 0) { | |
323 | (void) xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
324 | blocks, rsvd); | |
325 | tp->t_blk_res = 0; | |
326 | } | |
327 | ||
328 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
329 | ||
330 | return (error); | |
331 | } | |
332 | ||
333 | ||
1da177e4 LT |
334 | /* |
335 | * Record the indicated change to the given field for application | |
336 | * to the file system's superblock when the transaction commits. | |
337 | * For now, just store the change in the transaction structure. | |
338 | * | |
339 | * Mark the transaction structure to indicate that the superblock | |
340 | * needs to be updated before committing. | |
341 | */ | |
342 | void | |
343 | xfs_trans_mod_sb( | |
344 | xfs_trans_t *tp, | |
345 | uint field, | |
346 | long delta) | |
347 | { | |
348 | ||
349 | switch (field) { | |
350 | case XFS_TRANS_SB_ICOUNT: | |
351 | tp->t_icount_delta += delta; | |
352 | break; | |
353 | case XFS_TRANS_SB_IFREE: | |
354 | tp->t_ifree_delta += delta; | |
355 | break; | |
356 | case XFS_TRANS_SB_FDBLOCKS: | |
357 | /* | |
358 | * Track the number of blocks allocated in the | |
359 | * transaction. Make sure it does not exceed the | |
360 | * number reserved. | |
361 | */ | |
362 | if (delta < 0) { | |
363 | tp->t_blk_res_used += (uint)-delta; | |
364 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
365 | } | |
366 | tp->t_fdblocks_delta += delta; | |
367 | break; | |
368 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
369 | /* | |
370 | * The allocation has already been applied to the | |
371 | * in-core superblock's counter. This should only | |
372 | * be applied to the on-disk superblock. | |
373 | */ | |
374 | ASSERT(delta < 0); | |
375 | tp->t_res_fdblocks_delta += delta; | |
376 | break; | |
377 | case XFS_TRANS_SB_FREXTENTS: | |
378 | /* | |
379 | * Track the number of blocks allocated in the | |
380 | * transaction. Make sure it does not exceed the | |
381 | * number reserved. | |
382 | */ | |
383 | if (delta < 0) { | |
384 | tp->t_rtx_res_used += (uint)-delta; | |
385 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
386 | } | |
387 | tp->t_frextents_delta += delta; | |
388 | break; | |
389 | case XFS_TRANS_SB_RES_FREXTENTS: | |
390 | /* | |
391 | * The allocation has already been applied to the | |
392 | * in-core superblocks's counter. This should only | |
393 | * be applied to the on-disk superblock. | |
394 | */ | |
395 | ASSERT(delta < 0); | |
396 | tp->t_res_frextents_delta += delta; | |
397 | break; | |
398 | case XFS_TRANS_SB_DBLOCKS: | |
399 | ASSERT(delta > 0); | |
400 | tp->t_dblocks_delta += delta; | |
401 | break; | |
402 | case XFS_TRANS_SB_AGCOUNT: | |
403 | ASSERT(delta > 0); | |
404 | tp->t_agcount_delta += delta; | |
405 | break; | |
406 | case XFS_TRANS_SB_IMAXPCT: | |
407 | tp->t_imaxpct_delta += delta; | |
408 | break; | |
409 | case XFS_TRANS_SB_REXTSIZE: | |
410 | tp->t_rextsize_delta += delta; | |
411 | break; | |
412 | case XFS_TRANS_SB_RBMBLOCKS: | |
413 | tp->t_rbmblocks_delta += delta; | |
414 | break; | |
415 | case XFS_TRANS_SB_RBLOCKS: | |
416 | tp->t_rblocks_delta += delta; | |
417 | break; | |
418 | case XFS_TRANS_SB_REXTENTS: | |
419 | tp->t_rextents_delta += delta; | |
420 | break; | |
421 | case XFS_TRANS_SB_REXTSLOG: | |
422 | tp->t_rextslog_delta += delta; | |
423 | break; | |
424 | default: | |
425 | ASSERT(0); | |
426 | return; | |
427 | } | |
428 | ||
429 | tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY); | |
430 | } | |
431 | ||
432 | /* | |
433 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
434 | * to bring the superblock buffer into the current transaction | |
435 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
436 | * | |
437 | * For now we just look at each field allowed to change and change | |
438 | * it if necessary. | |
439 | */ | |
440 | STATIC void | |
441 | xfs_trans_apply_sb_deltas( | |
442 | xfs_trans_t *tp) | |
443 | { | |
444 | xfs_sb_t *sbp; | |
445 | xfs_buf_t *bp; | |
446 | int whole = 0; | |
447 | ||
448 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
449 | sbp = XFS_BUF_TO_SBP(bp); | |
450 | ||
451 | /* | |
452 | * Check that superblock mods match the mods made to AGF counters. | |
453 | */ | |
454 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
455 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
456 | tp->t_ag_btree_delta)); | |
457 | ||
458 | if (tp->t_icount_delta != 0) { | |
459 | INT_MOD(sbp->sb_icount, ARCH_CONVERT, tp->t_icount_delta); | |
460 | } | |
461 | if (tp->t_ifree_delta != 0) { | |
462 | INT_MOD(sbp->sb_ifree, ARCH_CONVERT, tp->t_ifree_delta); | |
463 | } | |
464 | ||
465 | if (tp->t_fdblocks_delta != 0) { | |
466 | INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_fdblocks_delta); | |
467 | } | |
468 | if (tp->t_res_fdblocks_delta != 0) { | |
469 | INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_res_fdblocks_delta); | |
470 | } | |
471 | ||
472 | if (tp->t_frextents_delta != 0) { | |
473 | INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_frextents_delta); | |
474 | } | |
475 | if (tp->t_res_frextents_delta != 0) { | |
476 | INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_res_frextents_delta); | |
477 | } | |
478 | if (tp->t_dblocks_delta != 0) { | |
479 | INT_MOD(sbp->sb_dblocks, ARCH_CONVERT, tp->t_dblocks_delta); | |
480 | whole = 1; | |
481 | } | |
482 | if (tp->t_agcount_delta != 0) { | |
483 | INT_MOD(sbp->sb_agcount, ARCH_CONVERT, tp->t_agcount_delta); | |
484 | whole = 1; | |
485 | } | |
486 | if (tp->t_imaxpct_delta != 0) { | |
487 | INT_MOD(sbp->sb_imax_pct, ARCH_CONVERT, tp->t_imaxpct_delta); | |
488 | whole = 1; | |
489 | } | |
490 | if (tp->t_rextsize_delta != 0) { | |
491 | INT_MOD(sbp->sb_rextsize, ARCH_CONVERT, tp->t_rextsize_delta); | |
492 | whole = 1; | |
493 | } | |
494 | if (tp->t_rbmblocks_delta != 0) { | |
495 | INT_MOD(sbp->sb_rbmblocks, ARCH_CONVERT, tp->t_rbmblocks_delta); | |
496 | whole = 1; | |
497 | } | |
498 | if (tp->t_rblocks_delta != 0) { | |
499 | INT_MOD(sbp->sb_rblocks, ARCH_CONVERT, tp->t_rblocks_delta); | |
500 | whole = 1; | |
501 | } | |
502 | if (tp->t_rextents_delta != 0) { | |
503 | INT_MOD(sbp->sb_rextents, ARCH_CONVERT, tp->t_rextents_delta); | |
504 | whole = 1; | |
505 | } | |
506 | if (tp->t_rextslog_delta != 0) { | |
507 | INT_MOD(sbp->sb_rextslog, ARCH_CONVERT, tp->t_rextslog_delta); | |
508 | whole = 1; | |
509 | } | |
510 | ||
511 | if (whole) | |
512 | /* | |
513 | * Log the whole thing, the fields are discontiguous. | |
514 | */ | |
515 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_sb_t) - 1); | |
516 | else | |
517 | /* | |
518 | * Since all the modifiable fields are contiguous, we | |
519 | * can get away with this. | |
520 | */ | |
521 | xfs_trans_log_buf(tp, bp, offsetof(xfs_sb_t, sb_icount), | |
522 | offsetof(xfs_sb_t, sb_frextents) + | |
523 | sizeof(sbp->sb_frextents) - 1); | |
524 | ||
525 | XFS_MTOVFS(tp->t_mountp)->vfs_super->s_dirt = 1; | |
526 | } | |
527 | ||
528 | /* | |
529 | * xfs_trans_unreserve_and_mod_sb() is called to release unused | |
530 | * reservations and apply superblock counter changes to the in-core | |
531 | * superblock. | |
532 | * | |
533 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
534 | */ | |
ba0f32d4 | 535 | STATIC void |
1da177e4 LT |
536 | xfs_trans_unreserve_and_mod_sb( |
537 | xfs_trans_t *tp) | |
538 | { | |
539 | xfs_mod_sb_t msb[14]; /* If you add cases, add entries */ | |
540 | xfs_mod_sb_t *msbp; | |
541 | /* REFERENCED */ | |
542 | int error; | |
543 | int rsvd; | |
544 | ||
545 | msbp = msb; | |
546 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
547 | ||
548 | /* | |
549 | * Release any reserved blocks. Any that were allocated | |
550 | * will be taken back again by fdblocks_delta below. | |
551 | */ | |
552 | if (tp->t_blk_res > 0) { | |
553 | msbp->msb_field = XFS_SBS_FDBLOCKS; | |
554 | msbp->msb_delta = tp->t_blk_res; | |
555 | msbp++; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Release any reserved real time extents . Any that were | |
560 | * allocated will be taken back again by frextents_delta below. | |
561 | */ | |
562 | if (tp->t_rtx_res > 0) { | |
563 | msbp->msb_field = XFS_SBS_FREXTENTS; | |
564 | msbp->msb_delta = tp->t_rtx_res; | |
565 | msbp++; | |
566 | } | |
567 | ||
568 | /* | |
569 | * Apply any superblock modifications to the in-core version. | |
570 | * The t_res_fdblocks_delta and t_res_frextents_delta fields are | |
571 | * explicity NOT applied to the in-core superblock. | |
572 | * The idea is that that has already been done. | |
573 | */ | |
574 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
575 | if (tp->t_icount_delta != 0) { | |
576 | msbp->msb_field = XFS_SBS_ICOUNT; | |
577 | msbp->msb_delta = (int)tp->t_icount_delta; | |
578 | msbp++; | |
579 | } | |
580 | if (tp->t_ifree_delta != 0) { | |
581 | msbp->msb_field = XFS_SBS_IFREE; | |
582 | msbp->msb_delta = (int)tp->t_ifree_delta; | |
583 | msbp++; | |
584 | } | |
585 | if (tp->t_fdblocks_delta != 0) { | |
586 | msbp->msb_field = XFS_SBS_FDBLOCKS; | |
587 | msbp->msb_delta = (int)tp->t_fdblocks_delta; | |
588 | msbp++; | |
589 | } | |
590 | if (tp->t_frextents_delta != 0) { | |
591 | msbp->msb_field = XFS_SBS_FREXTENTS; | |
592 | msbp->msb_delta = (int)tp->t_frextents_delta; | |
593 | msbp++; | |
594 | } | |
595 | if (tp->t_dblocks_delta != 0) { | |
596 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
597 | msbp->msb_delta = (int)tp->t_dblocks_delta; | |
598 | msbp++; | |
599 | } | |
600 | if (tp->t_agcount_delta != 0) { | |
601 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
602 | msbp->msb_delta = (int)tp->t_agcount_delta; | |
603 | msbp++; | |
604 | } | |
605 | if (tp->t_imaxpct_delta != 0) { | |
606 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
607 | msbp->msb_delta = (int)tp->t_imaxpct_delta; | |
608 | msbp++; | |
609 | } | |
610 | if (tp->t_rextsize_delta != 0) { | |
611 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
612 | msbp->msb_delta = (int)tp->t_rextsize_delta; | |
613 | msbp++; | |
614 | } | |
615 | if (tp->t_rbmblocks_delta != 0) { | |
616 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
617 | msbp->msb_delta = (int)tp->t_rbmblocks_delta; | |
618 | msbp++; | |
619 | } | |
620 | if (tp->t_rblocks_delta != 0) { | |
621 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
622 | msbp->msb_delta = (int)tp->t_rblocks_delta; | |
623 | msbp++; | |
624 | } | |
625 | if (tp->t_rextents_delta != 0) { | |
626 | msbp->msb_field = XFS_SBS_REXTENTS; | |
627 | msbp->msb_delta = (int)tp->t_rextents_delta; | |
628 | msbp++; | |
629 | } | |
630 | if (tp->t_rextslog_delta != 0) { | |
631 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
632 | msbp->msb_delta = (int)tp->t_rextslog_delta; | |
633 | msbp++; | |
634 | } | |
635 | } | |
636 | ||
637 | /* | |
638 | * If we need to change anything, do it. | |
639 | */ | |
640 | if (msbp > msb) { | |
641 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
642 | (uint)(msbp - msb), rsvd); | |
643 | ASSERT(error == 0); | |
644 | } | |
645 | } | |
646 | ||
647 | ||
648 | /* | |
649 | * xfs_trans_commit | |
650 | * | |
651 | * Commit the given transaction to the log a/synchronously. | |
652 | * | |
653 | * XFS disk error handling mechanism is not based on a typical | |
654 | * transaction abort mechanism. Logically after the filesystem | |
655 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
656 | * be durable - ie. committed to disk - because some metadata might | |
657 | * be inconsistent. In such cases, this returns an error, and the | |
658 | * caller may assume that all locked objects joined to the transaction | |
659 | * have already been unlocked as if the commit had succeeded. | |
660 | * Do not reference the transaction structure after this call. | |
661 | */ | |
662 | /*ARGSUSED*/ | |
663 | int | |
f538d4da | 664 | _xfs_trans_commit( |
1da177e4 LT |
665 | xfs_trans_t *tp, |
666 | uint flags, | |
f538d4da CH |
667 | xfs_lsn_t *commit_lsn_p, |
668 | int *log_flushed) | |
1da177e4 LT |
669 | { |
670 | xfs_log_iovec_t *log_vector; | |
671 | int nvec; | |
672 | xfs_mount_t *mp; | |
673 | xfs_lsn_t commit_lsn; | |
674 | /* REFERENCED */ | |
675 | int error; | |
676 | int log_flags; | |
677 | int sync; | |
678 | #define XFS_TRANS_LOGVEC_COUNT 16 | |
679 | xfs_log_iovec_t log_vector_fast[XFS_TRANS_LOGVEC_COUNT]; | |
680 | #if defined(XLOG_NOLOG) || defined(DEBUG) | |
681 | static xfs_lsn_t trans_lsn = 1; | |
682 | #endif | |
683 | void *commit_iclog; | |
684 | int shutdown; | |
685 | ||
686 | commit_lsn = -1; | |
687 | ||
688 | /* | |
689 | * Determine whether this commit is releasing a permanent | |
690 | * log reservation or not. | |
691 | */ | |
692 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
693 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
694 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
695 | } else { | |
696 | log_flags = 0; | |
697 | } | |
698 | mp = tp->t_mountp; | |
699 | ||
700 | /* | |
701 | * If there is nothing to be logged by the transaction, | |
702 | * then unlock all of the items associated with the | |
703 | * transaction and free the transaction structure. | |
704 | * Also make sure to return any reserved blocks to | |
705 | * the free pool. | |
706 | */ | |
707 | shut_us_down: | |
708 | shutdown = XFS_FORCED_SHUTDOWN(mp) ? EIO : 0; | |
709 | if (!(tp->t_flags & XFS_TRANS_DIRTY) || shutdown) { | |
710 | xfs_trans_unreserve_and_mod_sb(tp); | |
711 | /* | |
712 | * It is indeed possible for the transaction to be | |
713 | * not dirty but the dqinfo portion to be. All that | |
714 | * means is that we have some (non-persistent) quota | |
715 | * reservations that need to be unreserved. | |
716 | */ | |
717 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp); | |
718 | if (tp->t_ticket) { | |
719 | commit_lsn = xfs_log_done(mp, tp->t_ticket, | |
720 | NULL, log_flags); | |
721 | if (commit_lsn == -1 && !shutdown) | |
722 | shutdown = XFS_ERROR(EIO); | |
723 | } | |
724 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
725 | xfs_trans_free_items(tp, shutdown? XFS_TRANS_ABORT : 0); | |
726 | xfs_trans_free_busy(tp); | |
727 | xfs_trans_free(tp); | |
728 | XFS_STATS_INC(xs_trans_empty); | |
729 | if (commit_lsn_p) | |
730 | *commit_lsn_p = commit_lsn; | |
731 | return (shutdown); | |
732 | } | |
733 | #if defined(XLOG_NOLOG) || defined(DEBUG) | |
734 | ASSERT(!xlog_debug || tp->t_ticket != NULL); | |
735 | #else | |
736 | ASSERT(tp->t_ticket != NULL); | |
737 | #endif | |
738 | ||
739 | /* | |
740 | * If we need to update the superblock, then do it now. | |
741 | */ | |
742 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
743 | xfs_trans_apply_sb_deltas(tp); | |
744 | } | |
745 | XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp); | |
746 | ||
747 | /* | |
748 | * Ask each log item how many log_vector entries it will | |
749 | * need so we can figure out how many to allocate. | |
750 | * Try to avoid the kmem_alloc() call in the common case | |
751 | * by using a vector from the stack when it fits. | |
752 | */ | |
753 | nvec = xfs_trans_count_vecs(tp); | |
754 | ||
755 | if (nvec == 0) { | |
756 | xfs_force_shutdown(mp, XFS_LOG_IO_ERROR); | |
757 | goto shut_us_down; | |
758 | } | |
759 | ||
760 | ||
761 | if (nvec <= XFS_TRANS_LOGVEC_COUNT) { | |
762 | log_vector = log_vector_fast; | |
763 | } else { | |
764 | log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec * | |
765 | sizeof(xfs_log_iovec_t), | |
766 | KM_SLEEP); | |
767 | } | |
768 | ||
769 | /* | |
770 | * Fill in the log_vector and pin the logged items, and | |
771 | * then write the transaction to the log. | |
772 | */ | |
773 | xfs_trans_fill_vecs(tp, log_vector); | |
774 | ||
775 | /* | |
776 | * Ignore errors here. xfs_log_done would do the right thing. | |
777 | * We need to put the ticket, etc. away. | |
778 | */ | |
779 | error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, | |
780 | &(tp->t_lsn)); | |
781 | ||
782 | #if defined(XLOG_NOLOG) || defined(DEBUG) | |
783 | if (xlog_debug) { | |
784 | commit_lsn = xfs_log_done(mp, tp->t_ticket, | |
785 | &commit_iclog, log_flags); | |
786 | } else { | |
787 | commit_lsn = 0; | |
788 | tp->t_lsn = trans_lsn++; | |
789 | } | |
790 | #else | |
791 | /* | |
792 | * This is the regular case. At this point (after the call finishes), | |
793 | * the transaction is committed incore and could go out to disk at | |
794 | * any time. However, all the items associated with the transaction | |
795 | * are still locked and pinned in memory. | |
796 | */ | |
797 | commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags); | |
798 | #endif | |
799 | ||
800 | tp->t_commit_lsn = commit_lsn; | |
801 | if (nvec > XFS_TRANS_LOGVEC_COUNT) { | |
802 | kmem_free(log_vector, nvec * sizeof(xfs_log_iovec_t)); | |
803 | } | |
804 | ||
805 | if (commit_lsn_p) | |
806 | *commit_lsn_p = commit_lsn; | |
807 | ||
808 | /* | |
809 | * If we got a log write error. Unpin the logitems that we | |
810 | * had pinned, clean up, free trans structure, and return error. | |
811 | */ | |
812 | if (error || commit_lsn == -1) { | |
813 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
814 | xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT); | |
815 | return XFS_ERROR(EIO); | |
816 | } | |
817 | ||
818 | /* | |
819 | * Once the transaction has committed, unused | |
820 | * reservations need to be released and changes to | |
821 | * the superblock need to be reflected in the in-core | |
822 | * version. Do that now. | |
823 | */ | |
824 | xfs_trans_unreserve_and_mod_sb(tp); | |
825 | ||
826 | sync = tp->t_flags & XFS_TRANS_SYNC; | |
827 | ||
828 | /* | |
829 | * Tell the LM to call the transaction completion routine | |
830 | * when the log write with LSN commit_lsn completes (e.g. | |
831 | * when the transaction commit really hits the on-disk log). | |
832 | * After this call we cannot reference tp, because the call | |
833 | * can happen at any time and the call will free the transaction | |
834 | * structure pointed to by tp. The only case where we call | |
835 | * the completion routine (xfs_trans_committed) directly is | |
836 | * if the log is turned off on a debug kernel or we're | |
837 | * running in simulation mode (the log is explicitly turned | |
838 | * off). | |
839 | */ | |
840 | tp->t_logcb.cb_func = (void(*)(void*, int))xfs_trans_committed; | |
841 | tp->t_logcb.cb_arg = tp; | |
842 | ||
843 | /* | |
844 | * We need to pass the iclog buffer which was used for the | |
845 | * transaction commit record into this function, and attach | |
846 | * the callback to it. The callback must be attached before | |
847 | * the items are unlocked to avoid racing with other threads | |
848 | * waiting for an item to unlock. | |
849 | */ | |
850 | shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb)); | |
851 | ||
852 | /* | |
853 | * Mark this thread as no longer being in a transaction | |
854 | */ | |
855 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
856 | ||
857 | /* | |
858 | * Once all the items of the transaction have been copied | |
859 | * to the in core log and the callback is attached, the | |
860 | * items can be unlocked. | |
861 | * | |
862 | * This will free descriptors pointing to items which were | |
863 | * not logged since there is nothing more to do with them. | |
864 | * For items which were logged, we will keep pointers to them | |
865 | * so they can be unpinned after the transaction commits to disk. | |
866 | * This will also stamp each modified meta-data item with | |
867 | * the commit lsn of this transaction for dependency tracking | |
868 | * purposes. | |
869 | */ | |
870 | xfs_trans_unlock_items(tp, commit_lsn); | |
871 | ||
872 | /* | |
873 | * If we detected a log error earlier, finish committing | |
874 | * the transaction now (unpin log items, etc). | |
875 | * | |
876 | * Order is critical here, to avoid using the transaction | |
877 | * pointer after its been freed (by xfs_trans_committed | |
878 | * either here now, or as a callback). We cannot do this | |
879 | * step inside xfs_log_notify as was done earlier because | |
880 | * of this issue. | |
881 | */ | |
882 | if (shutdown) | |
883 | xfs_trans_committed(tp, XFS_LI_ABORTED); | |
884 | ||
885 | /* | |
886 | * Now that the xfs_trans_committed callback has been attached, | |
887 | * and the items are released we can finally allow the iclog to | |
888 | * go to disk. | |
889 | */ | |
890 | error = xfs_log_release_iclog(mp, commit_iclog); | |
891 | ||
892 | /* | |
893 | * If the transaction needs to be synchronous, then force the | |
894 | * log out now and wait for it. | |
895 | */ | |
896 | if (sync) { | |
f538d4da CH |
897 | if (!error) { |
898 | error = _xfs_log_force(mp, commit_lsn, | |
899 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
900 | log_flushed); | |
901 | } | |
1da177e4 LT |
902 | XFS_STATS_INC(xs_trans_sync); |
903 | } else { | |
904 | XFS_STATS_INC(xs_trans_async); | |
905 | } | |
906 | ||
907 | return (error); | |
908 | } | |
909 | ||
910 | ||
911 | /* | |
912 | * Total up the number of log iovecs needed to commit this | |
913 | * transaction. The transaction itself needs one for the | |
914 | * transaction header. Ask each dirty item in turn how many | |
915 | * it needs to get the total. | |
916 | */ | |
917 | STATIC uint | |
918 | xfs_trans_count_vecs( | |
919 | xfs_trans_t *tp) | |
920 | { | |
921 | int nvecs; | |
922 | xfs_log_item_desc_t *lidp; | |
923 | ||
924 | nvecs = 1; | |
925 | lidp = xfs_trans_first_item(tp); | |
926 | ASSERT(lidp != NULL); | |
927 | ||
928 | /* In the non-debug case we need to start bailing out if we | |
929 | * didn't find a log_item here, return zero and let trans_commit | |
930 | * deal with it. | |
931 | */ | |
932 | if (lidp == NULL) | |
933 | return 0; | |
934 | ||
935 | while (lidp != NULL) { | |
936 | /* | |
937 | * Skip items which aren't dirty in this transaction. | |
938 | */ | |
939 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
940 | lidp = xfs_trans_next_item(tp, lidp); | |
941 | continue; | |
942 | } | |
943 | lidp->lid_size = IOP_SIZE(lidp->lid_item); | |
944 | nvecs += lidp->lid_size; | |
945 | lidp = xfs_trans_next_item(tp, lidp); | |
946 | } | |
947 | ||
948 | return nvecs; | |
949 | } | |
950 | ||
951 | /* | |
952 | * Called from the trans_commit code when we notice that | |
953 | * the filesystem is in the middle of a forced shutdown. | |
954 | */ | |
955 | STATIC void | |
956 | xfs_trans_uncommit( | |
957 | xfs_trans_t *tp, | |
958 | uint flags) | |
959 | { | |
960 | xfs_log_item_desc_t *lidp; | |
961 | ||
962 | for (lidp = xfs_trans_first_item(tp); | |
963 | lidp != NULL; | |
964 | lidp = xfs_trans_next_item(tp, lidp)) { | |
965 | /* | |
966 | * Unpin all but those that aren't dirty. | |
967 | */ | |
968 | if (lidp->lid_flags & XFS_LID_DIRTY) | |
969 | IOP_UNPIN_REMOVE(lidp->lid_item, tp); | |
970 | } | |
971 | ||
972 | xfs_trans_unreserve_and_mod_sb(tp); | |
973 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(tp->t_mountp, tp); | |
974 | ||
975 | xfs_trans_free_items(tp, flags); | |
976 | xfs_trans_free_busy(tp); | |
977 | xfs_trans_free(tp); | |
978 | } | |
979 | ||
980 | /* | |
981 | * Fill in the vector with pointers to data to be logged | |
982 | * by this transaction. The transaction header takes | |
983 | * the first vector, and then each dirty item takes the | |
984 | * number of vectors it indicated it needed in xfs_trans_count_vecs(). | |
985 | * | |
986 | * As each item fills in the entries it needs, also pin the item | |
987 | * so that it cannot be flushed out until the log write completes. | |
988 | */ | |
989 | STATIC void | |
990 | xfs_trans_fill_vecs( | |
991 | xfs_trans_t *tp, | |
992 | xfs_log_iovec_t *log_vector) | |
993 | { | |
994 | xfs_log_item_desc_t *lidp; | |
995 | xfs_log_iovec_t *vecp; | |
996 | uint nitems; | |
997 | ||
998 | /* | |
999 | * Skip over the entry for the transaction header, we'll | |
1000 | * fill that in at the end. | |
1001 | */ | |
1002 | vecp = log_vector + 1; /* pointer arithmetic */ | |
1003 | ||
1004 | nitems = 0; | |
1005 | lidp = xfs_trans_first_item(tp); | |
1006 | ASSERT(lidp != NULL); | |
1007 | while (lidp != NULL) { | |
1008 | /* | |
1009 | * Skip items which aren't dirty in this transaction. | |
1010 | */ | |
1011 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
1012 | lidp = xfs_trans_next_item(tp, lidp); | |
1013 | continue; | |
1014 | } | |
1015 | /* | |
1016 | * The item may be marked dirty but not log anything. | |
1017 | * This can be used to get called when a transaction | |
1018 | * is committed. | |
1019 | */ | |
1020 | if (lidp->lid_size) { | |
1021 | nitems++; | |
1022 | } | |
1023 | IOP_FORMAT(lidp->lid_item, vecp); | |
1024 | vecp += lidp->lid_size; /* pointer arithmetic */ | |
1025 | IOP_PIN(lidp->lid_item); | |
1026 | lidp = xfs_trans_next_item(tp, lidp); | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Now that we've counted the number of items in this | |
1031 | * transaction, fill in the transaction header. | |
1032 | */ | |
1033 | tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC; | |
1034 | tp->t_header.th_type = tp->t_type; | |
1035 | tp->t_header.th_num_items = nitems; | |
1036 | log_vector->i_addr = (xfs_caddr_t)&tp->t_header; | |
1037 | log_vector->i_len = sizeof(xfs_trans_header_t); | |
7e9c6396 | 1038 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_TRANSHDR); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | ||
1042 | /* | |
1043 | * Unlock all of the transaction's items and free the transaction. | |
1044 | * The transaction must not have modified any of its items, because | |
1045 | * there is no way to restore them to their previous state. | |
1046 | * | |
1047 | * If the transaction has made a log reservation, make sure to release | |
1048 | * it as well. | |
1049 | */ | |
1050 | void | |
1051 | xfs_trans_cancel( | |
1052 | xfs_trans_t *tp, | |
1053 | int flags) | |
1054 | { | |
1055 | int log_flags; | |
1056 | #ifdef DEBUG | |
1057 | xfs_log_item_chunk_t *licp; | |
1058 | xfs_log_item_desc_t *lidp; | |
1059 | xfs_log_item_t *lip; | |
1060 | int i; | |
1061 | #endif | |
1062 | ||
1063 | /* | |
1064 | * See if the caller is being too lazy to figure out if | |
1065 | * the transaction really needs an abort. | |
1066 | */ | |
1067 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
1068 | flags &= ~XFS_TRANS_ABORT; | |
1069 | /* | |
1070 | * See if the caller is relying on us to shut down the | |
1071 | * filesystem. This happens in paths where we detect | |
1072 | * corruption and decide to give up. | |
1073 | */ | |
1074 | if ((tp->t_flags & XFS_TRANS_DIRTY) && | |
1075 | !XFS_FORCED_SHUTDOWN(tp->t_mountp)) | |
1076 | xfs_force_shutdown(tp->t_mountp, XFS_CORRUPT_INCORE); | |
1077 | #ifdef DEBUG | |
1078 | if (!(flags & XFS_TRANS_ABORT)) { | |
1079 | licp = &(tp->t_items); | |
1080 | while (licp != NULL) { | |
1081 | lidp = licp->lic_descs; | |
1082 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
1083 | if (XFS_LIC_ISFREE(licp, i)) { | |
1084 | continue; | |
1085 | } | |
1086 | ||
1087 | lip = lidp->lid_item; | |
1088 | if (!XFS_FORCED_SHUTDOWN(tp->t_mountp)) | |
1089 | ASSERT(!(lip->li_type == XFS_LI_EFD)); | |
1090 | } | |
1091 | licp = licp->lic_next; | |
1092 | } | |
1093 | } | |
1094 | #endif | |
1095 | xfs_trans_unreserve_and_mod_sb(tp); | |
1096 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(tp->t_mountp, tp); | |
1097 | ||
1098 | if (tp->t_ticket) { | |
1099 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1100 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1101 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1102 | } else { | |
1103 | log_flags = 0; | |
1104 | } | |
1105 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
1106 | } | |
1107 | ||
1108 | /* mark this thread as no longer being in a transaction */ | |
1109 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
1110 | ||
1111 | xfs_trans_free_items(tp, flags); | |
1112 | xfs_trans_free_busy(tp); | |
1113 | xfs_trans_free(tp); | |
1114 | } | |
1115 | ||
1116 | ||
1117 | /* | |
1118 | * Free the transaction structure. If there is more clean up | |
1119 | * to do when the structure is freed, add it here. | |
1120 | */ | |
1121 | STATIC void | |
1122 | xfs_trans_free( | |
1123 | xfs_trans_t *tp) | |
1124 | { | |
1125 | atomic_dec(&tp->t_mountp->m_active_trans); | |
1126 | XFS_TRANS_FREE_DQINFO(tp->t_mountp, tp); | |
1127 | kmem_zone_free(xfs_trans_zone, tp); | |
1128 | } | |
1129 | ||
1130 | ||
1131 | /* | |
1132 | * THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item(). | |
1133 | * | |
1134 | * This is typically called by the LM when a transaction has been fully | |
1135 | * committed to disk. It needs to unpin the items which have | |
1136 | * been logged by the transaction and update their positions | |
1137 | * in the AIL if necessary. | |
1138 | * This also gets called when the transactions didn't get written out | |
1139 | * because of an I/O error. Abortflag & XFS_LI_ABORTED is set then. | |
1140 | * | |
1141 | * Call xfs_trans_chunk_committed() to process the items in | |
1142 | * each chunk. | |
1143 | */ | |
1144 | STATIC void | |
1145 | xfs_trans_committed( | |
1146 | xfs_trans_t *tp, | |
1147 | int abortflag) | |
1148 | { | |
1149 | xfs_log_item_chunk_t *licp; | |
1150 | xfs_log_item_chunk_t *next_licp; | |
1151 | xfs_log_busy_chunk_t *lbcp; | |
1152 | xfs_log_busy_slot_t *lbsp; | |
1153 | int i; | |
1154 | ||
1155 | /* | |
1156 | * Call the transaction's completion callback if there | |
1157 | * is one. | |
1158 | */ | |
1159 | if (tp->t_callback != NULL) { | |
1160 | tp->t_callback(tp, tp->t_callarg); | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Special case the chunk embedded in the transaction. | |
1165 | */ | |
1166 | licp = &(tp->t_items); | |
1167 | if (!(XFS_LIC_ARE_ALL_FREE(licp))) { | |
1168 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Process the items in each chunk in turn. | |
1173 | */ | |
1174 | licp = licp->lic_next; | |
1175 | while (licp != NULL) { | |
1176 | ASSERT(!XFS_LIC_ARE_ALL_FREE(licp)); | |
1177 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); | |
1178 | next_licp = licp->lic_next; | |
1179 | kmem_free(licp, sizeof(xfs_log_item_chunk_t)); | |
1180 | licp = next_licp; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Clear all the per-AG busy list items listed in this transaction | |
1185 | */ | |
1186 | lbcp = &tp->t_busy; | |
1187 | while (lbcp != NULL) { | |
1188 | for (i = 0, lbsp = lbcp->lbc_busy; i < lbcp->lbc_unused; i++, lbsp++) { | |
1189 | if (!XFS_LBC_ISFREE(lbcp, i)) { | |
1190 | xfs_alloc_clear_busy(tp, lbsp->lbc_ag, | |
1191 | lbsp->lbc_idx); | |
1192 | } | |
1193 | } | |
1194 | lbcp = lbcp->lbc_next; | |
1195 | } | |
1196 | xfs_trans_free_busy(tp); | |
1197 | ||
1198 | /* | |
1199 | * That's it for the transaction structure. Free it. | |
1200 | */ | |
1201 | xfs_trans_free(tp); | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * This is called to perform the commit processing for each | |
1206 | * item described by the given chunk. | |
1207 | * | |
1208 | * The commit processing consists of unlocking items which were | |
1209 | * held locked with the SYNC_UNLOCK attribute, calling the committed | |
1210 | * routine of each logged item, updating the item's position in the AIL | |
1211 | * if necessary, and unpinning each item. If the committed routine | |
1212 | * returns -1, then do nothing further with the item because it | |
1213 | * may have been freed. | |
1214 | * | |
1215 | * Since items are unlocked when they are copied to the incore | |
1216 | * log, it is possible for two transactions to be completing | |
1217 | * and manipulating the same item simultaneously. The AIL lock | |
1218 | * will protect the lsn field of each item. The value of this | |
1219 | * field can never go backwards. | |
1220 | * | |
1221 | * We unpin the items after repositioning them in the AIL, because | |
1222 | * otherwise they could be immediately flushed and we'd have to race | |
1223 | * with the flusher trying to pull the item from the AIL as we add it. | |
1224 | */ | |
1225 | STATIC void | |
1226 | xfs_trans_chunk_committed( | |
1227 | xfs_log_item_chunk_t *licp, | |
1228 | xfs_lsn_t lsn, | |
1229 | int aborted) | |
1230 | { | |
1231 | xfs_log_item_desc_t *lidp; | |
1232 | xfs_log_item_t *lip; | |
1233 | xfs_lsn_t item_lsn; | |
1234 | struct xfs_mount *mp; | |
1235 | int i; | |
1236 | SPLDECL(s); | |
1237 | ||
1238 | lidp = licp->lic_descs; | |
1239 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
1240 | if (XFS_LIC_ISFREE(licp, i)) { | |
1241 | continue; | |
1242 | } | |
1243 | ||
1244 | lip = lidp->lid_item; | |
1245 | if (aborted) | |
1246 | lip->li_flags |= XFS_LI_ABORTED; | |
1247 | ||
1248 | /* | |
1249 | * Send in the ABORTED flag to the COMMITTED routine | |
1250 | * so that it knows whether the transaction was aborted | |
1251 | * or not. | |
1252 | */ | |
1253 | item_lsn = IOP_COMMITTED(lip, lsn); | |
1254 | ||
1255 | /* | |
1256 | * If the committed routine returns -1, make | |
1257 | * no more references to the item. | |
1258 | */ | |
1259 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) { | |
1260 | continue; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * If the returned lsn is greater than what it | |
1265 | * contained before, update the location of the | |
1266 | * item in the AIL. If it is not, then do nothing. | |
1267 | * Items can never move backwards in the AIL. | |
1268 | * | |
1269 | * While the new lsn should usually be greater, it | |
1270 | * is possible that a later transaction completing | |
1271 | * simultaneously with an earlier one using the | |
1272 | * same item could complete first with a higher lsn. | |
1273 | * This would cause the earlier transaction to fail | |
1274 | * the test below. | |
1275 | */ | |
1276 | mp = lip->li_mountp; | |
1277 | AIL_LOCK(mp,s); | |
1278 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { | |
1279 | /* | |
1280 | * This will set the item's lsn to item_lsn | |
1281 | * and update the position of the item in | |
1282 | * the AIL. | |
1283 | * | |
1284 | * xfs_trans_update_ail() drops the AIL lock. | |
1285 | */ | |
1286 | xfs_trans_update_ail(mp, lip, item_lsn, s); | |
1287 | } else { | |
1288 | AIL_UNLOCK(mp, s); | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Now that we've repositioned the item in the AIL, | |
1293 | * unpin it so it can be flushed. Pass information | |
1294 | * about buffer stale state down from the log item | |
1295 | * flags, if anyone else stales the buffer we do not | |
1296 | * want to pay any attention to it. | |
1297 | */ | |
1298 | IOP_UNPIN(lip, lidp->lid_flags & XFS_LID_BUF_STALE); | |
1299 | } | |
1300 | } |