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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
27 | #include "xfs_dir.h" | |
28 | #include "xfs_dir2.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_mount.h" | |
31 | #include "xfs_error.h" | |
a844f451 | 32 | #include "xfs_da_btree.h" |
1da177e4 | 33 | #include "xfs_bmap_btree.h" |
a844f451 | 34 | #include "xfs_alloc_btree.h" |
1da177e4 | 35 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
36 | #include "xfs_dir_sf.h" |
37 | #include "xfs_dir2_sf.h" | |
a844f451 | 38 | #include "xfs_attr_sf.h" |
1da177e4 LT |
39 | #include "xfs_dinode.h" |
40 | #include "xfs_inode.h" | |
a844f451 NS |
41 | #include "xfs_btree.h" |
42 | #include "xfs_ialloc.h" | |
43 | #include "xfs_alloc.h" | |
1da177e4 | 44 | #include "xfs_bmap.h" |
1da177e4 | 45 | #include "xfs_quota.h" |
a844f451 | 46 | #include "xfs_trans_priv.h" |
1da177e4 LT |
47 | #include "xfs_trans_space.h" |
48 | ||
49 | ||
50 | STATIC void xfs_trans_apply_sb_deltas(xfs_trans_t *); | |
51 | STATIC uint xfs_trans_count_vecs(xfs_trans_t *); | |
52 | STATIC void xfs_trans_fill_vecs(xfs_trans_t *, xfs_log_iovec_t *); | |
53 | STATIC void xfs_trans_uncommit(xfs_trans_t *, uint); | |
54 | STATIC void xfs_trans_committed(xfs_trans_t *, int); | |
55 | STATIC void xfs_trans_chunk_committed(xfs_log_item_chunk_t *, xfs_lsn_t, int); | |
56 | STATIC void xfs_trans_free(xfs_trans_t *); | |
57 | ||
58 | kmem_zone_t *xfs_trans_zone; | |
59 | ||
60 | ||
61 | /* | |
62 | * Initialize the precomputed transaction reservation values | |
63 | * in the mount structure. | |
64 | */ | |
65 | void | |
66 | xfs_trans_init( | |
67 | xfs_mount_t *mp) | |
68 | { | |
69 | xfs_trans_reservations_t *resp; | |
70 | ||
71 | resp = &(mp->m_reservations); | |
72 | resp->tr_write = | |
73 | (uint)(XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
74 | resp->tr_itruncate = | |
75 | (uint)(XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
76 | resp->tr_rename = | |
77 | (uint)(XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
78 | resp->tr_link = (uint)XFS_CALC_LINK_LOG_RES(mp); | |
79 | resp->tr_remove = | |
80 | (uint)(XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
81 | resp->tr_symlink = | |
82 | (uint)(XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
83 | resp->tr_create = | |
84 | (uint)(XFS_CALC_CREATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
85 | resp->tr_mkdir = | |
86 | (uint)(XFS_CALC_MKDIR_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
87 | resp->tr_ifree = | |
88 | (uint)(XFS_CALC_IFREE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
89 | resp->tr_ichange = | |
90 | (uint)(XFS_CALC_ICHANGE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
91 | resp->tr_growdata = (uint)XFS_CALC_GROWDATA_LOG_RES(mp); | |
92 | resp->tr_swrite = (uint)XFS_CALC_SWRITE_LOG_RES(mp); | |
93 | resp->tr_writeid = (uint)XFS_CALC_WRITEID_LOG_RES(mp); | |
94 | resp->tr_addafork = | |
95 | (uint)(XFS_CALC_ADDAFORK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
96 | resp->tr_attrinval = (uint)XFS_CALC_ATTRINVAL_LOG_RES(mp); | |
97 | resp->tr_attrset = | |
98 | (uint)(XFS_CALC_ATTRSET_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
99 | resp->tr_attrrm = | |
100 | (uint)(XFS_CALC_ATTRRM_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp)); | |
101 | resp->tr_clearagi = (uint)XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp); | |
102 | resp->tr_growrtalloc = (uint)XFS_CALC_GROWRTALLOC_LOG_RES(mp); | |
103 | resp->tr_growrtzero = (uint)XFS_CALC_GROWRTZERO_LOG_RES(mp); | |
104 | resp->tr_growrtfree = (uint)XFS_CALC_GROWRTFREE_LOG_RES(mp); | |
105 | } | |
106 | ||
107 | /* | |
108 | * This routine is called to allocate a transaction structure. | |
109 | * The type parameter indicates the type of the transaction. These | |
110 | * are enumerated in xfs_trans.h. | |
111 | * | |
112 | * Dynamically allocate the transaction structure from the transaction | |
113 | * zone, initialize it, and return it to the caller. | |
114 | */ | |
115 | xfs_trans_t * | |
116 | xfs_trans_alloc( | |
117 | xfs_mount_t *mp, | |
118 | uint type) | |
119 | { | |
120 | fs_check_frozen(XFS_MTOVFS(mp), SB_FREEZE_TRANS); | |
121 | atomic_inc(&mp->m_active_trans); | |
122 | ||
123 | return (_xfs_trans_alloc(mp, type)); | |
124 | ||
125 | } | |
126 | ||
127 | xfs_trans_t * | |
128 | _xfs_trans_alloc( | |
129 | xfs_mount_t *mp, | |
130 | uint type) | |
131 | { | |
132 | xfs_trans_t *tp; | |
133 | ||
134 | ASSERT(xfs_trans_zone != NULL); | |
135 | tp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
136 | ||
137 | /* | |
138 | * Initialize the transaction structure. | |
139 | */ | |
140 | tp->t_magic = XFS_TRANS_MAGIC; | |
141 | tp->t_type = type; | |
142 | tp->t_mountp = mp; | |
143 | tp->t_items_free = XFS_LIC_NUM_SLOTS; | |
144 | tp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
145 | XFS_LIC_INIT(&(tp->t_items)); | |
146 | XFS_LBC_INIT(&(tp->t_busy)); | |
147 | ||
148 | return (tp); | |
149 | } | |
150 | ||
151 | /* | |
152 | * This is called to create a new transaction which will share the | |
153 | * permanent log reservation of the given transaction. The remaining | |
154 | * unused block and rt extent reservations are also inherited. This | |
155 | * implies that the original transaction is no longer allowed to allocate | |
156 | * blocks. Locks and log items, however, are no inherited. They must | |
157 | * be added to the new transaction explicitly. | |
158 | */ | |
159 | xfs_trans_t * | |
160 | xfs_trans_dup( | |
161 | xfs_trans_t *tp) | |
162 | { | |
163 | xfs_trans_t *ntp; | |
164 | ||
165 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
166 | ||
167 | /* | |
168 | * Initialize the new transaction structure. | |
169 | */ | |
170 | ntp->t_magic = XFS_TRANS_MAGIC; | |
171 | ntp->t_type = tp->t_type; | |
172 | ntp->t_mountp = tp->t_mountp; | |
173 | ntp->t_items_free = XFS_LIC_NUM_SLOTS; | |
174 | ntp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
175 | XFS_LIC_INIT(&(ntp->t_items)); | |
176 | XFS_LBC_INIT(&(ntp->t_busy)); | |
177 | ||
178 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 179 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 180 | |
1da177e4 LT |
181 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE); |
182 | ntp->t_ticket = tp->t_ticket; | |
183 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; | |
184 | tp->t_blk_res = tp->t_blk_res_used; | |
185 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
186 | tp->t_rtx_res = tp->t_rtx_res_used; | |
187 | PFLAGS_DUP(&tp->t_pflags, &ntp->t_pflags); | |
188 | ||
189 | XFS_TRANS_DUP_DQINFO(tp->t_mountp, tp, ntp); | |
190 | ||
191 | atomic_inc(&tp->t_mountp->m_active_trans); | |
192 | return ntp; | |
193 | } | |
194 | ||
195 | /* | |
196 | * This is called to reserve free disk blocks and log space for the | |
197 | * given transaction. This must be done before allocating any resources | |
198 | * within the transaction. | |
199 | * | |
200 | * This will return ENOSPC if there are not enough blocks available. | |
201 | * It will sleep waiting for available log space. | |
202 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
203 | * is used by long running transactions. If any one of the reservations | |
204 | * fails then they will all be backed out. | |
205 | * | |
206 | * This does not do quota reservations. That typically is done by the | |
207 | * caller afterwards. | |
208 | */ | |
209 | int | |
210 | xfs_trans_reserve( | |
211 | xfs_trans_t *tp, | |
212 | uint blocks, | |
213 | uint logspace, | |
214 | uint rtextents, | |
215 | uint flags, | |
216 | uint logcount) | |
217 | { | |
218 | int log_flags; | |
219 | int error; | |
220 | int rsvd; | |
221 | ||
222 | error = 0; | |
223 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
224 | ||
225 | /* Mark this thread as being in a transaction */ | |
226 | PFLAGS_SET_FSTRANS(&tp->t_pflags); | |
227 | ||
228 | /* | |
229 | * Attempt to reserve the needed disk blocks by decrementing | |
230 | * the number needed from the number available. This will | |
231 | * fail if the count would go below zero. | |
232 | */ | |
233 | if (blocks > 0) { | |
234 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
235 | -blocks, rsvd); | |
236 | if (error != 0) { | |
237 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
238 | return (XFS_ERROR(ENOSPC)); | |
239 | } | |
240 | tp->t_blk_res += blocks; | |
241 | } | |
242 | ||
243 | /* | |
244 | * Reserve the log space needed for this transaction. | |
245 | */ | |
246 | if (logspace > 0) { | |
247 | ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace)); | |
248 | ASSERT((tp->t_log_count == 0) || | |
249 | (tp->t_log_count == logcount)); | |
250 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
251 | log_flags = XFS_LOG_PERM_RESERV; | |
252 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; | |
253 | } else { | |
254 | ASSERT(tp->t_ticket == NULL); | |
255 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
256 | log_flags = 0; | |
257 | } | |
258 | ||
259 | error = xfs_log_reserve(tp->t_mountp, logspace, logcount, | |
260 | &tp->t_ticket, | |
7e9c6396 | 261 | XFS_TRANSACTION, log_flags, tp->t_type); |
1da177e4 LT |
262 | if (error) { |
263 | goto undo_blocks; | |
264 | } | |
265 | tp->t_log_res = logspace; | |
266 | tp->t_log_count = logcount; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Attempt to reserve the needed realtime extents by decrementing | |
271 | * the number needed from the number available. This will | |
272 | * fail if the count would go below zero. | |
273 | */ | |
274 | if (rtextents > 0) { | |
275 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
276 | -rtextents, rsvd); | |
277 | if (error) { | |
278 | error = XFS_ERROR(ENOSPC); | |
279 | goto undo_log; | |
280 | } | |
281 | tp->t_rtx_res += rtextents; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | ||
286 | /* | |
287 | * Error cases jump to one of these labels to undo any | |
288 | * reservations which have already been performed. | |
289 | */ | |
290 | undo_log: | |
291 | if (logspace > 0) { | |
292 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
293 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
294 | } else { | |
295 | log_flags = 0; | |
296 | } | |
297 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
298 | tp->t_ticket = NULL; | |
299 | tp->t_log_res = 0; | |
300 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
301 | } | |
302 | ||
303 | undo_blocks: | |
304 | if (blocks > 0) { | |
305 | (void) xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
306 | blocks, rsvd); | |
307 | tp->t_blk_res = 0; | |
308 | } | |
309 | ||
310 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
311 | ||
312 | return (error); | |
313 | } | |
314 | ||
315 | ||
1da177e4 LT |
316 | /* |
317 | * Record the indicated change to the given field for application | |
318 | * to the file system's superblock when the transaction commits. | |
319 | * For now, just store the change in the transaction structure. | |
320 | * | |
321 | * Mark the transaction structure to indicate that the superblock | |
322 | * needs to be updated before committing. | |
323 | */ | |
324 | void | |
325 | xfs_trans_mod_sb( | |
326 | xfs_trans_t *tp, | |
327 | uint field, | |
328 | long delta) | |
329 | { | |
330 | ||
331 | switch (field) { | |
332 | case XFS_TRANS_SB_ICOUNT: | |
333 | tp->t_icount_delta += delta; | |
334 | break; | |
335 | case XFS_TRANS_SB_IFREE: | |
336 | tp->t_ifree_delta += delta; | |
337 | break; | |
338 | case XFS_TRANS_SB_FDBLOCKS: | |
339 | /* | |
340 | * Track the number of blocks allocated in the | |
341 | * transaction. Make sure it does not exceed the | |
342 | * number reserved. | |
343 | */ | |
344 | if (delta < 0) { | |
345 | tp->t_blk_res_used += (uint)-delta; | |
346 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
347 | } | |
348 | tp->t_fdblocks_delta += delta; | |
349 | break; | |
350 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
351 | /* | |
352 | * The allocation has already been applied to the | |
353 | * in-core superblock's counter. This should only | |
354 | * be applied to the on-disk superblock. | |
355 | */ | |
356 | ASSERT(delta < 0); | |
357 | tp->t_res_fdblocks_delta += delta; | |
358 | break; | |
359 | case XFS_TRANS_SB_FREXTENTS: | |
360 | /* | |
361 | * Track the number of blocks allocated in the | |
362 | * transaction. Make sure it does not exceed the | |
363 | * number reserved. | |
364 | */ | |
365 | if (delta < 0) { | |
366 | tp->t_rtx_res_used += (uint)-delta; | |
367 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
368 | } | |
369 | tp->t_frextents_delta += delta; | |
370 | break; | |
371 | case XFS_TRANS_SB_RES_FREXTENTS: | |
372 | /* | |
373 | * The allocation has already been applied to the | |
374 | * in-core superblocks's counter. This should only | |
375 | * be applied to the on-disk superblock. | |
376 | */ | |
377 | ASSERT(delta < 0); | |
378 | tp->t_res_frextents_delta += delta; | |
379 | break; | |
380 | case XFS_TRANS_SB_DBLOCKS: | |
381 | ASSERT(delta > 0); | |
382 | tp->t_dblocks_delta += delta; | |
383 | break; | |
384 | case XFS_TRANS_SB_AGCOUNT: | |
385 | ASSERT(delta > 0); | |
386 | tp->t_agcount_delta += delta; | |
387 | break; | |
388 | case XFS_TRANS_SB_IMAXPCT: | |
389 | tp->t_imaxpct_delta += delta; | |
390 | break; | |
391 | case XFS_TRANS_SB_REXTSIZE: | |
392 | tp->t_rextsize_delta += delta; | |
393 | break; | |
394 | case XFS_TRANS_SB_RBMBLOCKS: | |
395 | tp->t_rbmblocks_delta += delta; | |
396 | break; | |
397 | case XFS_TRANS_SB_RBLOCKS: | |
398 | tp->t_rblocks_delta += delta; | |
399 | break; | |
400 | case XFS_TRANS_SB_REXTENTS: | |
401 | tp->t_rextents_delta += delta; | |
402 | break; | |
403 | case XFS_TRANS_SB_REXTSLOG: | |
404 | tp->t_rextslog_delta += delta; | |
405 | break; | |
406 | default: | |
407 | ASSERT(0); | |
408 | return; | |
409 | } | |
410 | ||
411 | tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY); | |
412 | } | |
413 | ||
414 | /* | |
415 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
416 | * to bring the superblock buffer into the current transaction | |
417 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
418 | * | |
419 | * For now we just look at each field allowed to change and change | |
420 | * it if necessary. | |
421 | */ | |
422 | STATIC void | |
423 | xfs_trans_apply_sb_deltas( | |
424 | xfs_trans_t *tp) | |
425 | { | |
426 | xfs_sb_t *sbp; | |
427 | xfs_buf_t *bp; | |
428 | int whole = 0; | |
429 | ||
430 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
431 | sbp = XFS_BUF_TO_SBP(bp); | |
432 | ||
433 | /* | |
434 | * Check that superblock mods match the mods made to AGF counters. | |
435 | */ | |
436 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
437 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
438 | tp->t_ag_btree_delta)); | |
439 | ||
440 | if (tp->t_icount_delta != 0) { | |
441 | INT_MOD(sbp->sb_icount, ARCH_CONVERT, tp->t_icount_delta); | |
442 | } | |
443 | if (tp->t_ifree_delta != 0) { | |
444 | INT_MOD(sbp->sb_ifree, ARCH_CONVERT, tp->t_ifree_delta); | |
445 | } | |
446 | ||
447 | if (tp->t_fdblocks_delta != 0) { | |
448 | INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_fdblocks_delta); | |
449 | } | |
450 | if (tp->t_res_fdblocks_delta != 0) { | |
451 | INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_res_fdblocks_delta); | |
452 | } | |
453 | ||
454 | if (tp->t_frextents_delta != 0) { | |
455 | INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_frextents_delta); | |
456 | } | |
457 | if (tp->t_res_frextents_delta != 0) { | |
458 | INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_res_frextents_delta); | |
459 | } | |
460 | if (tp->t_dblocks_delta != 0) { | |
461 | INT_MOD(sbp->sb_dblocks, ARCH_CONVERT, tp->t_dblocks_delta); | |
462 | whole = 1; | |
463 | } | |
464 | if (tp->t_agcount_delta != 0) { | |
465 | INT_MOD(sbp->sb_agcount, ARCH_CONVERT, tp->t_agcount_delta); | |
466 | whole = 1; | |
467 | } | |
468 | if (tp->t_imaxpct_delta != 0) { | |
469 | INT_MOD(sbp->sb_imax_pct, ARCH_CONVERT, tp->t_imaxpct_delta); | |
470 | whole = 1; | |
471 | } | |
472 | if (tp->t_rextsize_delta != 0) { | |
473 | INT_MOD(sbp->sb_rextsize, ARCH_CONVERT, tp->t_rextsize_delta); | |
474 | whole = 1; | |
475 | } | |
476 | if (tp->t_rbmblocks_delta != 0) { | |
477 | INT_MOD(sbp->sb_rbmblocks, ARCH_CONVERT, tp->t_rbmblocks_delta); | |
478 | whole = 1; | |
479 | } | |
480 | if (tp->t_rblocks_delta != 0) { | |
481 | INT_MOD(sbp->sb_rblocks, ARCH_CONVERT, tp->t_rblocks_delta); | |
482 | whole = 1; | |
483 | } | |
484 | if (tp->t_rextents_delta != 0) { | |
485 | INT_MOD(sbp->sb_rextents, ARCH_CONVERT, tp->t_rextents_delta); | |
486 | whole = 1; | |
487 | } | |
488 | if (tp->t_rextslog_delta != 0) { | |
489 | INT_MOD(sbp->sb_rextslog, ARCH_CONVERT, tp->t_rextslog_delta); | |
490 | whole = 1; | |
491 | } | |
492 | ||
493 | if (whole) | |
494 | /* | |
495 | * Log the whole thing, the fields are discontiguous. | |
496 | */ | |
497 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_sb_t) - 1); | |
498 | else | |
499 | /* | |
500 | * Since all the modifiable fields are contiguous, we | |
501 | * can get away with this. | |
502 | */ | |
503 | xfs_trans_log_buf(tp, bp, offsetof(xfs_sb_t, sb_icount), | |
504 | offsetof(xfs_sb_t, sb_frextents) + | |
505 | sizeof(sbp->sb_frextents) - 1); | |
506 | ||
507 | XFS_MTOVFS(tp->t_mountp)->vfs_super->s_dirt = 1; | |
508 | } | |
509 | ||
510 | /* | |
511 | * xfs_trans_unreserve_and_mod_sb() is called to release unused | |
512 | * reservations and apply superblock counter changes to the in-core | |
513 | * superblock. | |
514 | * | |
515 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
516 | */ | |
ba0f32d4 | 517 | STATIC void |
1da177e4 LT |
518 | xfs_trans_unreserve_and_mod_sb( |
519 | xfs_trans_t *tp) | |
520 | { | |
521 | xfs_mod_sb_t msb[14]; /* If you add cases, add entries */ | |
522 | xfs_mod_sb_t *msbp; | |
523 | /* REFERENCED */ | |
524 | int error; | |
525 | int rsvd; | |
526 | ||
527 | msbp = msb; | |
528 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
529 | ||
530 | /* | |
531 | * Release any reserved blocks. Any that were allocated | |
532 | * will be taken back again by fdblocks_delta below. | |
533 | */ | |
534 | if (tp->t_blk_res > 0) { | |
535 | msbp->msb_field = XFS_SBS_FDBLOCKS; | |
536 | msbp->msb_delta = tp->t_blk_res; | |
537 | msbp++; | |
538 | } | |
539 | ||
540 | /* | |
541 | * Release any reserved real time extents . Any that were | |
542 | * allocated will be taken back again by frextents_delta below. | |
543 | */ | |
544 | if (tp->t_rtx_res > 0) { | |
545 | msbp->msb_field = XFS_SBS_FREXTENTS; | |
546 | msbp->msb_delta = tp->t_rtx_res; | |
547 | msbp++; | |
548 | } | |
549 | ||
550 | /* | |
551 | * Apply any superblock modifications to the in-core version. | |
552 | * The t_res_fdblocks_delta and t_res_frextents_delta fields are | |
553 | * explicity NOT applied to the in-core superblock. | |
554 | * The idea is that that has already been done. | |
555 | */ | |
556 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
557 | if (tp->t_icount_delta != 0) { | |
558 | msbp->msb_field = XFS_SBS_ICOUNT; | |
559 | msbp->msb_delta = (int)tp->t_icount_delta; | |
560 | msbp++; | |
561 | } | |
562 | if (tp->t_ifree_delta != 0) { | |
563 | msbp->msb_field = XFS_SBS_IFREE; | |
564 | msbp->msb_delta = (int)tp->t_ifree_delta; | |
565 | msbp++; | |
566 | } | |
567 | if (tp->t_fdblocks_delta != 0) { | |
568 | msbp->msb_field = XFS_SBS_FDBLOCKS; | |
569 | msbp->msb_delta = (int)tp->t_fdblocks_delta; | |
570 | msbp++; | |
571 | } | |
572 | if (tp->t_frextents_delta != 0) { | |
573 | msbp->msb_field = XFS_SBS_FREXTENTS; | |
574 | msbp->msb_delta = (int)tp->t_frextents_delta; | |
575 | msbp++; | |
576 | } | |
577 | if (tp->t_dblocks_delta != 0) { | |
578 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
579 | msbp->msb_delta = (int)tp->t_dblocks_delta; | |
580 | msbp++; | |
581 | } | |
582 | if (tp->t_agcount_delta != 0) { | |
583 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
584 | msbp->msb_delta = (int)tp->t_agcount_delta; | |
585 | msbp++; | |
586 | } | |
587 | if (tp->t_imaxpct_delta != 0) { | |
588 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
589 | msbp->msb_delta = (int)tp->t_imaxpct_delta; | |
590 | msbp++; | |
591 | } | |
592 | if (tp->t_rextsize_delta != 0) { | |
593 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
594 | msbp->msb_delta = (int)tp->t_rextsize_delta; | |
595 | msbp++; | |
596 | } | |
597 | if (tp->t_rbmblocks_delta != 0) { | |
598 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
599 | msbp->msb_delta = (int)tp->t_rbmblocks_delta; | |
600 | msbp++; | |
601 | } | |
602 | if (tp->t_rblocks_delta != 0) { | |
603 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
604 | msbp->msb_delta = (int)tp->t_rblocks_delta; | |
605 | msbp++; | |
606 | } | |
607 | if (tp->t_rextents_delta != 0) { | |
608 | msbp->msb_field = XFS_SBS_REXTENTS; | |
609 | msbp->msb_delta = (int)tp->t_rextents_delta; | |
610 | msbp++; | |
611 | } | |
612 | if (tp->t_rextslog_delta != 0) { | |
613 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
614 | msbp->msb_delta = (int)tp->t_rextslog_delta; | |
615 | msbp++; | |
616 | } | |
617 | } | |
618 | ||
619 | /* | |
620 | * If we need to change anything, do it. | |
621 | */ | |
622 | if (msbp > msb) { | |
623 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
624 | (uint)(msbp - msb), rsvd); | |
625 | ASSERT(error == 0); | |
626 | } | |
627 | } | |
628 | ||
629 | ||
630 | /* | |
631 | * xfs_trans_commit | |
632 | * | |
633 | * Commit the given transaction to the log a/synchronously. | |
634 | * | |
635 | * XFS disk error handling mechanism is not based on a typical | |
636 | * transaction abort mechanism. Logically after the filesystem | |
637 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
638 | * be durable - ie. committed to disk - because some metadata might | |
639 | * be inconsistent. In such cases, this returns an error, and the | |
640 | * caller may assume that all locked objects joined to the transaction | |
641 | * have already been unlocked as if the commit had succeeded. | |
642 | * Do not reference the transaction structure after this call. | |
643 | */ | |
644 | /*ARGSUSED*/ | |
645 | int | |
f538d4da | 646 | _xfs_trans_commit( |
1da177e4 LT |
647 | xfs_trans_t *tp, |
648 | uint flags, | |
f538d4da CH |
649 | xfs_lsn_t *commit_lsn_p, |
650 | int *log_flushed) | |
1da177e4 LT |
651 | { |
652 | xfs_log_iovec_t *log_vector; | |
653 | int nvec; | |
654 | xfs_mount_t *mp; | |
655 | xfs_lsn_t commit_lsn; | |
656 | /* REFERENCED */ | |
657 | int error; | |
658 | int log_flags; | |
659 | int sync; | |
660 | #define XFS_TRANS_LOGVEC_COUNT 16 | |
661 | xfs_log_iovec_t log_vector_fast[XFS_TRANS_LOGVEC_COUNT]; | |
1da177e4 LT |
662 | void *commit_iclog; |
663 | int shutdown; | |
664 | ||
665 | commit_lsn = -1; | |
666 | ||
667 | /* | |
668 | * Determine whether this commit is releasing a permanent | |
669 | * log reservation or not. | |
670 | */ | |
671 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
672 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
673 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
674 | } else { | |
675 | log_flags = 0; | |
676 | } | |
677 | mp = tp->t_mountp; | |
678 | ||
679 | /* | |
680 | * If there is nothing to be logged by the transaction, | |
681 | * then unlock all of the items associated with the | |
682 | * transaction and free the transaction structure. | |
683 | * Also make sure to return any reserved blocks to | |
684 | * the free pool. | |
685 | */ | |
686 | shut_us_down: | |
687 | shutdown = XFS_FORCED_SHUTDOWN(mp) ? EIO : 0; | |
688 | if (!(tp->t_flags & XFS_TRANS_DIRTY) || shutdown) { | |
689 | xfs_trans_unreserve_and_mod_sb(tp); | |
690 | /* | |
691 | * It is indeed possible for the transaction to be | |
692 | * not dirty but the dqinfo portion to be. All that | |
693 | * means is that we have some (non-persistent) quota | |
694 | * reservations that need to be unreserved. | |
695 | */ | |
696 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp); | |
697 | if (tp->t_ticket) { | |
698 | commit_lsn = xfs_log_done(mp, tp->t_ticket, | |
699 | NULL, log_flags); | |
700 | if (commit_lsn == -1 && !shutdown) | |
701 | shutdown = XFS_ERROR(EIO); | |
702 | } | |
703 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
704 | xfs_trans_free_items(tp, shutdown? XFS_TRANS_ABORT : 0); | |
705 | xfs_trans_free_busy(tp); | |
706 | xfs_trans_free(tp); | |
707 | XFS_STATS_INC(xs_trans_empty); | |
708 | if (commit_lsn_p) | |
709 | *commit_lsn_p = commit_lsn; | |
710 | return (shutdown); | |
711 | } | |
1da177e4 | 712 | ASSERT(tp->t_ticket != NULL); |
1da177e4 LT |
713 | |
714 | /* | |
715 | * If we need to update the superblock, then do it now. | |
716 | */ | |
717 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
718 | xfs_trans_apply_sb_deltas(tp); | |
719 | } | |
720 | XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp); | |
721 | ||
722 | /* | |
723 | * Ask each log item how many log_vector entries it will | |
724 | * need so we can figure out how many to allocate. | |
725 | * Try to avoid the kmem_alloc() call in the common case | |
726 | * by using a vector from the stack when it fits. | |
727 | */ | |
728 | nvec = xfs_trans_count_vecs(tp); | |
1da177e4 LT |
729 | if (nvec == 0) { |
730 | xfs_force_shutdown(mp, XFS_LOG_IO_ERROR); | |
731 | goto shut_us_down; | |
cfcbbbd0 | 732 | } else if (nvec <= XFS_TRANS_LOGVEC_COUNT) { |
1da177e4 LT |
733 | log_vector = log_vector_fast; |
734 | } else { | |
735 | log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec * | |
736 | sizeof(xfs_log_iovec_t), | |
737 | KM_SLEEP); | |
738 | } | |
739 | ||
740 | /* | |
741 | * Fill in the log_vector and pin the logged items, and | |
742 | * then write the transaction to the log. | |
743 | */ | |
744 | xfs_trans_fill_vecs(tp, log_vector); | |
745 | ||
cfcbbbd0 | 746 | error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn)); |
1da177e4 | 747 | |
1da177e4 | 748 | /* |
cfcbbbd0 NS |
749 | * The transaction is committed incore here, and can go out to disk |
750 | * at any time after this call. However, all the items associated | |
751 | * with the transaction are still locked and pinned in memory. | |
1da177e4 LT |
752 | */ |
753 | commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags); | |
1da177e4 LT |
754 | |
755 | tp->t_commit_lsn = commit_lsn; | |
756 | if (nvec > XFS_TRANS_LOGVEC_COUNT) { | |
757 | kmem_free(log_vector, nvec * sizeof(xfs_log_iovec_t)); | |
758 | } | |
759 | ||
760 | if (commit_lsn_p) | |
761 | *commit_lsn_p = commit_lsn; | |
762 | ||
763 | /* | |
764 | * If we got a log write error. Unpin the logitems that we | |
765 | * had pinned, clean up, free trans structure, and return error. | |
766 | */ | |
767 | if (error || commit_lsn == -1) { | |
768 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
769 | xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT); | |
770 | return XFS_ERROR(EIO); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Once the transaction has committed, unused | |
775 | * reservations need to be released and changes to | |
776 | * the superblock need to be reflected in the in-core | |
777 | * version. Do that now. | |
778 | */ | |
779 | xfs_trans_unreserve_and_mod_sb(tp); | |
780 | ||
781 | sync = tp->t_flags & XFS_TRANS_SYNC; | |
782 | ||
783 | /* | |
784 | * Tell the LM to call the transaction completion routine | |
785 | * when the log write with LSN commit_lsn completes (e.g. | |
786 | * when the transaction commit really hits the on-disk log). | |
787 | * After this call we cannot reference tp, because the call | |
788 | * can happen at any time and the call will free the transaction | |
789 | * structure pointed to by tp. The only case where we call | |
790 | * the completion routine (xfs_trans_committed) directly is | |
791 | * if the log is turned off on a debug kernel or we're | |
792 | * running in simulation mode (the log is explicitly turned | |
793 | * off). | |
794 | */ | |
795 | tp->t_logcb.cb_func = (void(*)(void*, int))xfs_trans_committed; | |
796 | tp->t_logcb.cb_arg = tp; | |
797 | ||
798 | /* | |
799 | * We need to pass the iclog buffer which was used for the | |
800 | * transaction commit record into this function, and attach | |
801 | * the callback to it. The callback must be attached before | |
802 | * the items are unlocked to avoid racing with other threads | |
803 | * waiting for an item to unlock. | |
804 | */ | |
805 | shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb)); | |
806 | ||
807 | /* | |
808 | * Mark this thread as no longer being in a transaction | |
809 | */ | |
810 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
811 | ||
812 | /* | |
813 | * Once all the items of the transaction have been copied | |
814 | * to the in core log and the callback is attached, the | |
815 | * items can be unlocked. | |
816 | * | |
817 | * This will free descriptors pointing to items which were | |
818 | * not logged since there is nothing more to do with them. | |
819 | * For items which were logged, we will keep pointers to them | |
820 | * so they can be unpinned after the transaction commits to disk. | |
821 | * This will also stamp each modified meta-data item with | |
822 | * the commit lsn of this transaction for dependency tracking | |
823 | * purposes. | |
824 | */ | |
825 | xfs_trans_unlock_items(tp, commit_lsn); | |
826 | ||
827 | /* | |
828 | * If we detected a log error earlier, finish committing | |
829 | * the transaction now (unpin log items, etc). | |
830 | * | |
831 | * Order is critical here, to avoid using the transaction | |
832 | * pointer after its been freed (by xfs_trans_committed | |
833 | * either here now, or as a callback). We cannot do this | |
834 | * step inside xfs_log_notify as was done earlier because | |
835 | * of this issue. | |
836 | */ | |
837 | if (shutdown) | |
838 | xfs_trans_committed(tp, XFS_LI_ABORTED); | |
839 | ||
840 | /* | |
841 | * Now that the xfs_trans_committed callback has been attached, | |
842 | * and the items are released we can finally allow the iclog to | |
843 | * go to disk. | |
844 | */ | |
845 | error = xfs_log_release_iclog(mp, commit_iclog); | |
846 | ||
847 | /* | |
848 | * If the transaction needs to be synchronous, then force the | |
849 | * log out now and wait for it. | |
850 | */ | |
851 | if (sync) { | |
f538d4da CH |
852 | if (!error) { |
853 | error = _xfs_log_force(mp, commit_lsn, | |
854 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
855 | log_flushed); | |
856 | } | |
1da177e4 LT |
857 | XFS_STATS_INC(xs_trans_sync); |
858 | } else { | |
859 | XFS_STATS_INC(xs_trans_async); | |
860 | } | |
861 | ||
862 | return (error); | |
863 | } | |
864 | ||
865 | ||
866 | /* | |
867 | * Total up the number of log iovecs needed to commit this | |
868 | * transaction. The transaction itself needs one for the | |
869 | * transaction header. Ask each dirty item in turn how many | |
870 | * it needs to get the total. | |
871 | */ | |
872 | STATIC uint | |
873 | xfs_trans_count_vecs( | |
874 | xfs_trans_t *tp) | |
875 | { | |
876 | int nvecs; | |
877 | xfs_log_item_desc_t *lidp; | |
878 | ||
879 | nvecs = 1; | |
880 | lidp = xfs_trans_first_item(tp); | |
881 | ASSERT(lidp != NULL); | |
882 | ||
883 | /* In the non-debug case we need to start bailing out if we | |
884 | * didn't find a log_item here, return zero and let trans_commit | |
885 | * deal with it. | |
886 | */ | |
887 | if (lidp == NULL) | |
888 | return 0; | |
889 | ||
890 | while (lidp != NULL) { | |
891 | /* | |
892 | * Skip items which aren't dirty in this transaction. | |
893 | */ | |
894 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
895 | lidp = xfs_trans_next_item(tp, lidp); | |
896 | continue; | |
897 | } | |
898 | lidp->lid_size = IOP_SIZE(lidp->lid_item); | |
899 | nvecs += lidp->lid_size; | |
900 | lidp = xfs_trans_next_item(tp, lidp); | |
901 | } | |
902 | ||
903 | return nvecs; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Called from the trans_commit code when we notice that | |
908 | * the filesystem is in the middle of a forced shutdown. | |
909 | */ | |
910 | STATIC void | |
911 | xfs_trans_uncommit( | |
912 | xfs_trans_t *tp, | |
913 | uint flags) | |
914 | { | |
915 | xfs_log_item_desc_t *lidp; | |
916 | ||
917 | for (lidp = xfs_trans_first_item(tp); | |
918 | lidp != NULL; | |
919 | lidp = xfs_trans_next_item(tp, lidp)) { | |
920 | /* | |
921 | * Unpin all but those that aren't dirty. | |
922 | */ | |
923 | if (lidp->lid_flags & XFS_LID_DIRTY) | |
924 | IOP_UNPIN_REMOVE(lidp->lid_item, tp); | |
925 | } | |
926 | ||
927 | xfs_trans_unreserve_and_mod_sb(tp); | |
928 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(tp->t_mountp, tp); | |
929 | ||
930 | xfs_trans_free_items(tp, flags); | |
931 | xfs_trans_free_busy(tp); | |
932 | xfs_trans_free(tp); | |
933 | } | |
934 | ||
935 | /* | |
936 | * Fill in the vector with pointers to data to be logged | |
937 | * by this transaction. The transaction header takes | |
938 | * the first vector, and then each dirty item takes the | |
939 | * number of vectors it indicated it needed in xfs_trans_count_vecs(). | |
940 | * | |
941 | * As each item fills in the entries it needs, also pin the item | |
942 | * so that it cannot be flushed out until the log write completes. | |
943 | */ | |
944 | STATIC void | |
945 | xfs_trans_fill_vecs( | |
946 | xfs_trans_t *tp, | |
947 | xfs_log_iovec_t *log_vector) | |
948 | { | |
949 | xfs_log_item_desc_t *lidp; | |
950 | xfs_log_iovec_t *vecp; | |
951 | uint nitems; | |
952 | ||
953 | /* | |
954 | * Skip over the entry for the transaction header, we'll | |
955 | * fill that in at the end. | |
956 | */ | |
957 | vecp = log_vector + 1; /* pointer arithmetic */ | |
958 | ||
959 | nitems = 0; | |
960 | lidp = xfs_trans_first_item(tp); | |
961 | ASSERT(lidp != NULL); | |
962 | while (lidp != NULL) { | |
963 | /* | |
964 | * Skip items which aren't dirty in this transaction. | |
965 | */ | |
966 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
967 | lidp = xfs_trans_next_item(tp, lidp); | |
968 | continue; | |
969 | } | |
970 | /* | |
971 | * The item may be marked dirty but not log anything. | |
972 | * This can be used to get called when a transaction | |
973 | * is committed. | |
974 | */ | |
975 | if (lidp->lid_size) { | |
976 | nitems++; | |
977 | } | |
978 | IOP_FORMAT(lidp->lid_item, vecp); | |
979 | vecp += lidp->lid_size; /* pointer arithmetic */ | |
980 | IOP_PIN(lidp->lid_item); | |
981 | lidp = xfs_trans_next_item(tp, lidp); | |
982 | } | |
983 | ||
984 | /* | |
985 | * Now that we've counted the number of items in this | |
986 | * transaction, fill in the transaction header. | |
987 | */ | |
988 | tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC; | |
989 | tp->t_header.th_type = tp->t_type; | |
990 | tp->t_header.th_num_items = nitems; | |
991 | log_vector->i_addr = (xfs_caddr_t)&tp->t_header; | |
992 | log_vector->i_len = sizeof(xfs_trans_header_t); | |
7e9c6396 | 993 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_TRANSHDR); |
1da177e4 LT |
994 | } |
995 | ||
996 | ||
997 | /* | |
998 | * Unlock all of the transaction's items and free the transaction. | |
999 | * The transaction must not have modified any of its items, because | |
1000 | * there is no way to restore them to their previous state. | |
1001 | * | |
1002 | * If the transaction has made a log reservation, make sure to release | |
1003 | * it as well. | |
1004 | */ | |
1005 | void | |
1006 | xfs_trans_cancel( | |
1007 | xfs_trans_t *tp, | |
1008 | int flags) | |
1009 | { | |
1010 | int log_flags; | |
1011 | #ifdef DEBUG | |
1012 | xfs_log_item_chunk_t *licp; | |
1013 | xfs_log_item_desc_t *lidp; | |
1014 | xfs_log_item_t *lip; | |
1015 | int i; | |
1016 | #endif | |
0733af21 | 1017 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1018 | |
1019 | /* | |
1020 | * See if the caller is being too lazy to figure out if | |
1021 | * the transaction really needs an abort. | |
1022 | */ | |
1023 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
1024 | flags &= ~XFS_TRANS_ABORT; | |
1025 | /* | |
1026 | * See if the caller is relying on us to shut down the | |
1027 | * filesystem. This happens in paths where we detect | |
1028 | * corruption and decide to give up. | |
1029 | */ | |
1030 | if ((tp->t_flags & XFS_TRANS_DIRTY) && | |
0733af21 RH |
1031 | !XFS_FORCED_SHUTDOWN(mp)) |
1032 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); | |
1033 | xfs_force_shutdown(mp, XFS_CORRUPT_INCORE); | |
1da177e4 LT |
1034 | #ifdef DEBUG |
1035 | if (!(flags & XFS_TRANS_ABORT)) { | |
1036 | licp = &(tp->t_items); | |
1037 | while (licp != NULL) { | |
1038 | lidp = licp->lic_descs; | |
1039 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
1040 | if (XFS_LIC_ISFREE(licp, i)) { | |
1041 | continue; | |
1042 | } | |
1043 | ||
1044 | lip = lidp->lid_item; | |
0733af21 | 1045 | if (!XFS_FORCED_SHUTDOWN(mp)) |
1da177e4 LT |
1046 | ASSERT(!(lip->li_type == XFS_LI_EFD)); |
1047 | } | |
1048 | licp = licp->lic_next; | |
1049 | } | |
1050 | } | |
1051 | #endif | |
1052 | xfs_trans_unreserve_and_mod_sb(tp); | |
0733af21 | 1053 | XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp); |
1da177e4 LT |
1054 | |
1055 | if (tp->t_ticket) { | |
1056 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1057 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1058 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1059 | } else { | |
1060 | log_flags = 0; | |
1061 | } | |
0733af21 | 1062 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1063 | } |
1064 | ||
1065 | /* mark this thread as no longer being in a transaction */ | |
1066 | PFLAGS_RESTORE_FSTRANS(&tp->t_pflags); | |
1067 | ||
1068 | xfs_trans_free_items(tp, flags); | |
1069 | xfs_trans_free_busy(tp); | |
1070 | xfs_trans_free(tp); | |
1071 | } | |
1072 | ||
1073 | ||
1074 | /* | |
1075 | * Free the transaction structure. If there is more clean up | |
1076 | * to do when the structure is freed, add it here. | |
1077 | */ | |
1078 | STATIC void | |
1079 | xfs_trans_free( | |
1080 | xfs_trans_t *tp) | |
1081 | { | |
1082 | atomic_dec(&tp->t_mountp->m_active_trans); | |
1083 | XFS_TRANS_FREE_DQINFO(tp->t_mountp, tp); | |
1084 | kmem_zone_free(xfs_trans_zone, tp); | |
1085 | } | |
1086 | ||
1087 | ||
1088 | /* | |
1089 | * THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item(). | |
1090 | * | |
1091 | * This is typically called by the LM when a transaction has been fully | |
1092 | * committed to disk. It needs to unpin the items which have | |
1093 | * been logged by the transaction and update their positions | |
1094 | * in the AIL if necessary. | |
1095 | * This also gets called when the transactions didn't get written out | |
1096 | * because of an I/O error. Abortflag & XFS_LI_ABORTED is set then. | |
1097 | * | |
1098 | * Call xfs_trans_chunk_committed() to process the items in | |
1099 | * each chunk. | |
1100 | */ | |
1101 | STATIC void | |
1102 | xfs_trans_committed( | |
1103 | xfs_trans_t *tp, | |
1104 | int abortflag) | |
1105 | { | |
1106 | xfs_log_item_chunk_t *licp; | |
1107 | xfs_log_item_chunk_t *next_licp; | |
1108 | xfs_log_busy_chunk_t *lbcp; | |
1109 | xfs_log_busy_slot_t *lbsp; | |
1110 | int i; | |
1111 | ||
1112 | /* | |
1113 | * Call the transaction's completion callback if there | |
1114 | * is one. | |
1115 | */ | |
1116 | if (tp->t_callback != NULL) { | |
1117 | tp->t_callback(tp, tp->t_callarg); | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Special case the chunk embedded in the transaction. | |
1122 | */ | |
1123 | licp = &(tp->t_items); | |
1124 | if (!(XFS_LIC_ARE_ALL_FREE(licp))) { | |
1125 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Process the items in each chunk in turn. | |
1130 | */ | |
1131 | licp = licp->lic_next; | |
1132 | while (licp != NULL) { | |
1133 | ASSERT(!XFS_LIC_ARE_ALL_FREE(licp)); | |
1134 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); | |
1135 | next_licp = licp->lic_next; | |
1136 | kmem_free(licp, sizeof(xfs_log_item_chunk_t)); | |
1137 | licp = next_licp; | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Clear all the per-AG busy list items listed in this transaction | |
1142 | */ | |
1143 | lbcp = &tp->t_busy; | |
1144 | while (lbcp != NULL) { | |
1145 | for (i = 0, lbsp = lbcp->lbc_busy; i < lbcp->lbc_unused; i++, lbsp++) { | |
1146 | if (!XFS_LBC_ISFREE(lbcp, i)) { | |
1147 | xfs_alloc_clear_busy(tp, lbsp->lbc_ag, | |
1148 | lbsp->lbc_idx); | |
1149 | } | |
1150 | } | |
1151 | lbcp = lbcp->lbc_next; | |
1152 | } | |
1153 | xfs_trans_free_busy(tp); | |
1154 | ||
1155 | /* | |
1156 | * That's it for the transaction structure. Free it. | |
1157 | */ | |
1158 | xfs_trans_free(tp); | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * This is called to perform the commit processing for each | |
1163 | * item described by the given chunk. | |
1164 | * | |
1165 | * The commit processing consists of unlocking items which were | |
1166 | * held locked with the SYNC_UNLOCK attribute, calling the committed | |
1167 | * routine of each logged item, updating the item's position in the AIL | |
1168 | * if necessary, and unpinning each item. If the committed routine | |
1169 | * returns -1, then do nothing further with the item because it | |
1170 | * may have been freed. | |
1171 | * | |
1172 | * Since items are unlocked when they are copied to the incore | |
1173 | * log, it is possible for two transactions to be completing | |
1174 | * and manipulating the same item simultaneously. The AIL lock | |
1175 | * will protect the lsn field of each item. The value of this | |
1176 | * field can never go backwards. | |
1177 | * | |
1178 | * We unpin the items after repositioning them in the AIL, because | |
1179 | * otherwise they could be immediately flushed and we'd have to race | |
1180 | * with the flusher trying to pull the item from the AIL as we add it. | |
1181 | */ | |
1182 | STATIC void | |
1183 | xfs_trans_chunk_committed( | |
1184 | xfs_log_item_chunk_t *licp, | |
1185 | xfs_lsn_t lsn, | |
1186 | int aborted) | |
1187 | { | |
1188 | xfs_log_item_desc_t *lidp; | |
1189 | xfs_log_item_t *lip; | |
1190 | xfs_lsn_t item_lsn; | |
1191 | struct xfs_mount *mp; | |
1192 | int i; | |
1193 | SPLDECL(s); | |
1194 | ||
1195 | lidp = licp->lic_descs; | |
1196 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
1197 | if (XFS_LIC_ISFREE(licp, i)) { | |
1198 | continue; | |
1199 | } | |
1200 | ||
1201 | lip = lidp->lid_item; | |
1202 | if (aborted) | |
1203 | lip->li_flags |= XFS_LI_ABORTED; | |
1204 | ||
1205 | /* | |
1206 | * Send in the ABORTED flag to the COMMITTED routine | |
1207 | * so that it knows whether the transaction was aborted | |
1208 | * or not. | |
1209 | */ | |
1210 | item_lsn = IOP_COMMITTED(lip, lsn); | |
1211 | ||
1212 | /* | |
1213 | * If the committed routine returns -1, make | |
1214 | * no more references to the item. | |
1215 | */ | |
1216 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) { | |
1217 | continue; | |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * If the returned lsn is greater than what it | |
1222 | * contained before, update the location of the | |
1223 | * item in the AIL. If it is not, then do nothing. | |
1224 | * Items can never move backwards in the AIL. | |
1225 | * | |
1226 | * While the new lsn should usually be greater, it | |
1227 | * is possible that a later transaction completing | |
1228 | * simultaneously with an earlier one using the | |
1229 | * same item could complete first with a higher lsn. | |
1230 | * This would cause the earlier transaction to fail | |
1231 | * the test below. | |
1232 | */ | |
1233 | mp = lip->li_mountp; | |
1234 | AIL_LOCK(mp,s); | |
1235 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { | |
1236 | /* | |
1237 | * This will set the item's lsn to item_lsn | |
1238 | * and update the position of the item in | |
1239 | * the AIL. | |
1240 | * | |
1241 | * xfs_trans_update_ail() drops the AIL lock. | |
1242 | */ | |
1243 | xfs_trans_update_ail(mp, lip, item_lsn, s); | |
1244 | } else { | |
1245 | AIL_UNLOCK(mp, s); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Now that we've repositioned the item in the AIL, | |
1250 | * unpin it so it can be flushed. Pass information | |
1251 | * about buffer stale state down from the log item | |
1252 | * flags, if anyone else stales the buffer we do not | |
1253 | * want to pay any attention to it. | |
1254 | */ | |
1255 | IOP_UNPIN(lip, lidp->lid_flags & XFS_LID_BUF_STALE); | |
1256 | } | |
1257 | } |