Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
e98c414f | 3 | * Copyright (C) 2010 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
10 | * This program is distributed in the hope that it would be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
1da177e4 | 14 | * |
7b718769 NS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 18 | */ |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
70a9883c | 21 | #include "xfs_shared.h" |
239880ef DC |
22 | #include "xfs_format.h" |
23 | #include "xfs_log_format.h" | |
24 | #include "xfs_trans_resv.h" | |
1da177e4 | 25 | #include "xfs_mount.h" |
1da177e4 | 26 | #include "xfs_inode.h" |
efc27b52 | 27 | #include "xfs_extent_busy.h" |
1da177e4 | 28 | #include "xfs_quota.h" |
239880ef | 29 | #include "xfs_trans.h" |
a844f451 | 30 | #include "xfs_trans_priv.h" |
239880ef | 31 | #include "xfs_log.h" |
ed3b4d6c | 32 | #include "xfs_trace.h" |
a4fbe6ab | 33 | #include "xfs_error.h" |
1da177e4 | 34 | |
8f794055 | 35 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 36 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* |
39 | * Initialize the precomputed transaction reservation values | |
40 | * in the mount structure. | |
41 | */ | |
42 | void | |
43 | xfs_trans_init( | |
025101dc | 44 | struct xfs_mount *mp) |
1da177e4 | 45 | { |
3d3c8b52 | 46 | xfs_trans_resv_calc(mp, M_RES(mp)); |
1da177e4 LT |
47 | } |
48 | ||
49 | /* | |
50 | * This routine is called to allocate a transaction structure. | |
51 | * The type parameter indicates the type of the transaction. These | |
52 | * are enumerated in xfs_trans.h. | |
b2ce3974 AE |
53 | * |
54 | * Dynamically allocate the transaction structure from the transaction | |
55 | * zone, initialize it, and return it to the caller. | |
1da177e4 | 56 | */ |
b2ce3974 AE |
57 | xfs_trans_t * |
58 | xfs_trans_alloc( | |
59 | xfs_mount_t *mp, | |
60 | uint type) | |
61 | { | |
d9457dc0 JK |
62 | xfs_trans_t *tp; |
63 | ||
64 | sb_start_intwrite(mp->m_super); | |
65 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); | |
66 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; | |
67 | return tp; | |
b2ce3974 AE |
68 | } |
69 | ||
70 | xfs_trans_t * | |
1da177e4 | 71 | _xfs_trans_alloc( |
b2ce3974 AE |
72 | xfs_mount_t *mp, |
73 | uint type, | |
77ba7877 | 74 | xfs_km_flags_t memflags) |
1da177e4 | 75 | { |
b2ce3974 | 76 | xfs_trans_t *tp; |
1da177e4 | 77 | |
d9457dc0 | 78 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
34327e13 | 79 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 80 | |
80641dc6 | 81 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
2a3c0acc | 82 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
83 | tp->t_type = type; |
84 | tp->t_mountp = mp; | |
e98c414f | 85 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 86 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 87 | return tp; |
1da177e4 LT |
88 | } |
89 | ||
b1c1b5b6 DC |
90 | /* |
91 | * Free the transaction structure. If there is more clean up | |
92 | * to do when the structure is freed, add it here. | |
93 | */ | |
94 | STATIC void | |
95 | xfs_trans_free( | |
ed3b4d6c | 96 | struct xfs_trans *tp) |
b1c1b5b6 | 97 | { |
4ecbfe63 DC |
98 | xfs_extent_busy_sort(&tp->t_busy); |
99 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 100 | |
b1c1b5b6 | 101 | atomic_dec(&tp->t_mountp->m_active_trans); |
d9457dc0 JK |
102 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
103 | sb_end_intwrite(tp->t_mountp->m_super); | |
b1c1b5b6 DC |
104 | xfs_trans_free_dqinfo(tp); |
105 | kmem_zone_free(xfs_trans_zone, tp); | |
106 | } | |
107 | ||
1da177e4 LT |
108 | /* |
109 | * This is called to create a new transaction which will share the | |
110 | * permanent log reservation of the given transaction. The remaining | |
111 | * unused block and rt extent reservations are also inherited. This | |
112 | * implies that the original transaction is no longer allowed to allocate | |
113 | * blocks. Locks and log items, however, are no inherited. They must | |
114 | * be added to the new transaction explicitly. | |
115 | */ | |
116 | xfs_trans_t * | |
117 | xfs_trans_dup( | |
118 | xfs_trans_t *tp) | |
119 | { | |
120 | xfs_trans_t *ntp; | |
121 | ||
122 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
123 | ||
124 | /* | |
125 | * Initialize the new transaction structure. | |
126 | */ | |
2a3c0acc | 127 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
128 | ntp->t_type = tp->t_type; |
129 | ntp->t_mountp = tp->t_mountp; | |
e98c414f | 130 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 131 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
132 | |
133 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 134 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 135 | |
d9457dc0 JK |
136 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
137 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
138 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); | |
139 | /* We gave our writer reference to the new transaction */ | |
140 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; | |
cc09c0dc | 141 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
142 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
143 | tp->t_blk_res = tp->t_blk_res_used; | |
144 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
145 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 146 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 147 | |
7d095257 | 148 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
149 | |
150 | atomic_inc(&tp->t_mountp->m_active_trans); | |
151 | return ntp; | |
152 | } | |
153 | ||
154 | /* | |
155 | * This is called to reserve free disk blocks and log space for the | |
156 | * given transaction. This must be done before allocating any resources | |
157 | * within the transaction. | |
158 | * | |
159 | * This will return ENOSPC if there are not enough blocks available. | |
160 | * It will sleep waiting for available log space. | |
161 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
162 | * is used by long running transactions. If any one of the reservations | |
163 | * fails then they will all be backed out. | |
164 | * | |
165 | * This does not do quota reservations. That typically is done by the | |
166 | * caller afterwards. | |
167 | */ | |
168 | int | |
169 | xfs_trans_reserve( | |
3d3c8b52 JL |
170 | struct xfs_trans *tp, |
171 | struct xfs_trans_res *resp, | |
172 | uint blocks, | |
173 | uint rtextents) | |
1da177e4 | 174 | { |
59c1b082 | 175 | int error = 0; |
0d485ada | 176 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
1da177e4 LT |
177 | |
178 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 179 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
180 | |
181 | /* | |
182 | * Attempt to reserve the needed disk blocks by decrementing | |
183 | * the number needed from the number available. This will | |
184 | * fail if the count would go below zero. | |
185 | */ | |
186 | if (blocks > 0) { | |
0d485ada | 187 | error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 | 188 | if (error != 0) { |
59c1b082 | 189 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
2451337d | 190 | return -ENOSPC; |
1da177e4 LT |
191 | } |
192 | tp->t_blk_res += blocks; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Reserve the log space needed for this transaction. | |
197 | */ | |
3d3c8b52 | 198 | if (resp->tr_logres > 0) { |
9006fb91 CH |
199 | bool permanent = false; |
200 | ||
3d3c8b52 JL |
201 | ASSERT(tp->t_log_res == 0 || |
202 | tp->t_log_res == resp->tr_logres); | |
203 | ASSERT(tp->t_log_count == 0 || | |
204 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 205 | |
3d3c8b52 | 206 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 207 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 208 | permanent = true; |
1da177e4 LT |
209 | } else { |
210 | ASSERT(tp->t_ticket == NULL); | |
211 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
212 | } |
213 | ||
9006fb91 | 214 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 215 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
216 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
217 | } else { | |
3d3c8b52 JL |
218 | error = xfs_log_reserve(tp->t_mountp, |
219 | resp->tr_logres, | |
220 | resp->tr_logcount, | |
221 | &tp->t_ticket, XFS_TRANSACTION, | |
222 | permanent, tp->t_type); | |
1da177e4 | 223 | } |
9006fb91 CH |
224 | |
225 | if (error) | |
226 | goto undo_blocks; | |
227 | ||
3d3c8b52 JL |
228 | tp->t_log_res = resp->tr_logres; |
229 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
230 | } |
231 | ||
232 | /* | |
233 | * Attempt to reserve the needed realtime extents by decrementing | |
234 | * the number needed from the number available. This will | |
235 | * fail if the count would go below zero. | |
236 | */ | |
237 | if (rtextents > 0) { | |
bab98bbe | 238 | error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents)); |
1da177e4 | 239 | if (error) { |
2451337d | 240 | error = -ENOSPC; |
1da177e4 LT |
241 | goto undo_log; |
242 | } | |
243 | tp->t_rtx_res += rtextents; | |
244 | } | |
245 | ||
246 | return 0; | |
247 | ||
248 | /* | |
249 | * Error cases jump to one of these labels to undo any | |
250 | * reservations which have already been performed. | |
251 | */ | |
252 | undo_log: | |
3d3c8b52 | 253 | if (resp->tr_logres > 0) { |
9006fb91 CH |
254 | int log_flags; |
255 | ||
3d3c8b52 | 256 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 LT |
257 | log_flags = XFS_LOG_REL_PERM_RESERV; |
258 | } else { | |
259 | log_flags = 0; | |
260 | } | |
261 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
262 | tp->t_ticket = NULL; | |
263 | tp->t_log_res = 0; | |
264 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
265 | } | |
266 | ||
267 | undo_blocks: | |
268 | if (blocks > 0) { | |
0d485ada | 269 | xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 LT |
270 | tp->t_blk_res = 0; |
271 | } | |
272 | ||
59c1b082 | 273 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 274 | |
59c1b082 | 275 | return error; |
1da177e4 LT |
276 | } |
277 | ||
1da177e4 LT |
278 | /* |
279 | * Record the indicated change to the given field for application | |
280 | * to the file system's superblock when the transaction commits. | |
281 | * For now, just store the change in the transaction structure. | |
282 | * | |
283 | * Mark the transaction structure to indicate that the superblock | |
284 | * needs to be updated before committing. | |
92821e2b DC |
285 | * |
286 | * Because we may not be keeping track of allocated/free inodes and | |
287 | * used filesystem blocks in the superblock, we do not mark the | |
288 | * superblock dirty in this transaction if we modify these fields. | |
289 | * We still need to update the transaction deltas so that they get | |
290 | * applied to the incore superblock, but we don't want them to | |
291 | * cause the superblock to get locked and logged if these are the | |
292 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
293 | */ |
294 | void | |
295 | xfs_trans_mod_sb( | |
296 | xfs_trans_t *tp, | |
297 | uint field, | |
20f4ebf2 | 298 | int64_t delta) |
1da177e4 | 299 | { |
92821e2b DC |
300 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
301 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
302 | |
303 | switch (field) { | |
304 | case XFS_TRANS_SB_ICOUNT: | |
305 | tp->t_icount_delta += delta; | |
92821e2b DC |
306 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
307 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
308 | break; |
309 | case XFS_TRANS_SB_IFREE: | |
310 | tp->t_ifree_delta += delta; | |
92821e2b DC |
311 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
312 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
313 | break; |
314 | case XFS_TRANS_SB_FDBLOCKS: | |
315 | /* | |
316 | * Track the number of blocks allocated in the | |
317 | * transaction. Make sure it does not exceed the | |
318 | * number reserved. | |
319 | */ | |
320 | if (delta < 0) { | |
321 | tp->t_blk_res_used += (uint)-delta; | |
322 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
323 | } | |
324 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
325 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
326 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
327 | break; |
328 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
329 | /* | |
330 | * The allocation has already been applied to the | |
331 | * in-core superblock's counter. This should only | |
332 | * be applied to the on-disk superblock. | |
333 | */ | |
334 | ASSERT(delta < 0); | |
335 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
336 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
337 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
338 | break; |
339 | case XFS_TRANS_SB_FREXTENTS: | |
340 | /* | |
341 | * Track the number of blocks allocated in the | |
342 | * transaction. Make sure it does not exceed the | |
343 | * number reserved. | |
344 | */ | |
345 | if (delta < 0) { | |
346 | tp->t_rtx_res_used += (uint)-delta; | |
347 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
348 | } | |
349 | tp->t_frextents_delta += delta; | |
350 | break; | |
351 | case XFS_TRANS_SB_RES_FREXTENTS: | |
352 | /* | |
353 | * The allocation has already been applied to the | |
c41564b5 | 354 | * in-core superblock's counter. This should only |
1da177e4 LT |
355 | * be applied to the on-disk superblock. |
356 | */ | |
357 | ASSERT(delta < 0); | |
358 | tp->t_res_frextents_delta += delta; | |
359 | break; | |
360 | case XFS_TRANS_SB_DBLOCKS: | |
361 | ASSERT(delta > 0); | |
362 | tp->t_dblocks_delta += delta; | |
363 | break; | |
364 | case XFS_TRANS_SB_AGCOUNT: | |
365 | ASSERT(delta > 0); | |
366 | tp->t_agcount_delta += delta; | |
367 | break; | |
368 | case XFS_TRANS_SB_IMAXPCT: | |
369 | tp->t_imaxpct_delta += delta; | |
370 | break; | |
371 | case XFS_TRANS_SB_REXTSIZE: | |
372 | tp->t_rextsize_delta += delta; | |
373 | break; | |
374 | case XFS_TRANS_SB_RBMBLOCKS: | |
375 | tp->t_rbmblocks_delta += delta; | |
376 | break; | |
377 | case XFS_TRANS_SB_RBLOCKS: | |
378 | tp->t_rblocks_delta += delta; | |
379 | break; | |
380 | case XFS_TRANS_SB_REXTENTS: | |
381 | tp->t_rextents_delta += delta; | |
382 | break; | |
383 | case XFS_TRANS_SB_REXTSLOG: | |
384 | tp->t_rextslog_delta += delta; | |
385 | break; | |
386 | default: | |
387 | ASSERT(0); | |
388 | return; | |
389 | } | |
390 | ||
210c6f1c | 391 | tp->t_flags |= flags; |
1da177e4 LT |
392 | } |
393 | ||
394 | /* | |
395 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
396 | * to bring the superblock buffer into the current transaction | |
397 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
398 | * | |
399 | * For now we just look at each field allowed to change and change | |
400 | * it if necessary. | |
401 | */ | |
402 | STATIC void | |
403 | xfs_trans_apply_sb_deltas( | |
404 | xfs_trans_t *tp) | |
405 | { | |
2bdf7cd0 | 406 | xfs_dsb_t *sbp; |
1da177e4 LT |
407 | xfs_buf_t *bp; |
408 | int whole = 0; | |
409 | ||
410 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
411 | sbp = XFS_BUF_TO_SBP(bp); | |
412 | ||
413 | /* | |
414 | * Check that superblock mods match the mods made to AGF counters. | |
415 | */ | |
416 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
417 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
418 | tp->t_ag_btree_delta)); | |
419 | ||
92821e2b DC |
420 | /* |
421 | * Only update the superblock counters if we are logging them | |
422 | */ | |
423 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 424 | if (tp->t_icount_delta) |
413d57c9 | 425 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 426 | if (tp->t_ifree_delta) |
413d57c9 | 427 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 428 | if (tp->t_fdblocks_delta) |
413d57c9 | 429 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 430 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 431 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
432 | } |
433 | ||
2bdf7cd0 | 434 | if (tp->t_frextents_delta) |
413d57c9 | 435 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 436 | if (tp->t_res_frextents_delta) |
413d57c9 | 437 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
438 | |
439 | if (tp->t_dblocks_delta) { | |
413d57c9 | 440 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
441 | whole = 1; |
442 | } | |
2bdf7cd0 | 443 | if (tp->t_agcount_delta) { |
413d57c9 | 444 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
445 | whole = 1; |
446 | } | |
2bdf7cd0 CH |
447 | if (tp->t_imaxpct_delta) { |
448 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
449 | whole = 1; |
450 | } | |
2bdf7cd0 | 451 | if (tp->t_rextsize_delta) { |
413d57c9 | 452 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
453 | whole = 1; |
454 | } | |
2bdf7cd0 | 455 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 456 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
457 | whole = 1; |
458 | } | |
2bdf7cd0 | 459 | if (tp->t_rblocks_delta) { |
413d57c9 | 460 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
461 | whole = 1; |
462 | } | |
2bdf7cd0 | 463 | if (tp->t_rextents_delta) { |
413d57c9 | 464 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
465 | whole = 1; |
466 | } | |
2bdf7cd0 CH |
467 | if (tp->t_rextslog_delta) { |
468 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
469 | whole = 1; |
470 | } | |
471 | ||
3443a3bc | 472 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
473 | if (whole) |
474 | /* | |
c41564b5 | 475 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 476 | */ |
2bdf7cd0 | 477 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
478 | else |
479 | /* | |
480 | * Since all the modifiable fields are contiguous, we | |
481 | * can get away with this. | |
482 | */ | |
2bdf7cd0 CH |
483 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
484 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 485 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
486 | } |
487 | ||
488 | /* | |
45c34141 DC |
489 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
490 | * and apply superblock counter changes to the in-core superblock. The | |
491 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
492 | * applied to the in-core superblock. The idea is that that has already been | |
493 | * done. | |
1da177e4 LT |
494 | * |
495 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
496 | * However, we have to ensure that we only modify each superblock field only |
497 | * once because the application of the delta values may not be atomic. That can | |
498 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
499 | * free space counter to put back the entire reservation and then take away | |
500 | * what we used. | |
501 | * | |
502 | * If we are not logging superblock counters, then the inode allocated/free and | |
503 | * used block counts are not updated in the on disk superblock. In this case, | |
504 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
505 | * still need to update the incore superblock with the changes. | |
1da177e4 | 506 | */ |
71e330b5 | 507 | void |
1da177e4 LT |
508 | xfs_trans_unreserve_and_mod_sb( |
509 | xfs_trans_t *tp) | |
510 | { | |
1b040712 | 511 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 512 | xfs_mod_sb_t *msbp; |
92821e2b | 513 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
514 | /* REFERENCED */ |
515 | int error; | |
0d485ada | 516 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
45c34141 DC |
517 | int64_t blkdelta = 0; |
518 | int64_t rtxdelta = 0; | |
1b040712 CH |
519 | int64_t idelta = 0; |
520 | int64_t ifreedelta = 0; | |
1da177e4 LT |
521 | |
522 | msbp = msb; | |
1da177e4 | 523 | |
1b040712 | 524 | /* calculate deltas */ |
45c34141 DC |
525 | if (tp->t_blk_res > 0) |
526 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
527 | if ((tp->t_fdblocks_delta != 0) && |
528 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
529 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
530 | blkdelta += tp->t_fdblocks_delta; | |
531 | ||
45c34141 DC |
532 | if (tp->t_rtx_res > 0) |
533 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
534 | if ((tp->t_frextents_delta != 0) && |
535 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
536 | rtxdelta += tp->t_frextents_delta; | |
537 | ||
1b040712 CH |
538 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
539 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
540 | idelta = tp->t_icount_delta; | |
541 | ifreedelta = tp->t_ifree_delta; | |
542 | } | |
543 | ||
544 | /* apply the per-cpu counters */ | |
545 | if (blkdelta) { | |
0d485ada | 546 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
547 | if (error) |
548 | goto out; | |
549 | } | |
550 | ||
551 | if (idelta) { | |
501ab323 | 552 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
553 | if (error) |
554 | goto out_undo_fdblocks; | |
555 | } | |
556 | ||
557 | if (ifreedelta) { | |
e88b64ea | 558 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
559 | if (error) |
560 | goto out_undo_icount; | |
561 | } | |
562 | ||
563 | /* apply remaining deltas */ | |
bab98bbe DC |
564 | if (rtxdelta) { |
565 | error = xfs_mod_frextents(mp, rtxdelta); | |
566 | if (error) | |
567 | goto out_undo_ifree; | |
1da177e4 LT |
568 | } |
569 | ||
92821e2b | 570 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
571 | if (tp->t_dblocks_delta != 0) { |
572 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 573 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
574 | msbp++; |
575 | } | |
576 | if (tp->t_agcount_delta != 0) { | |
577 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 578 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
579 | msbp++; |
580 | } | |
581 | if (tp->t_imaxpct_delta != 0) { | |
582 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 583 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
584 | msbp++; |
585 | } | |
586 | if (tp->t_rextsize_delta != 0) { | |
587 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 588 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
589 | msbp++; |
590 | } | |
591 | if (tp->t_rbmblocks_delta != 0) { | |
592 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 593 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
594 | msbp++; |
595 | } | |
596 | if (tp->t_rblocks_delta != 0) { | |
597 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 598 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
599 | msbp++; |
600 | } | |
601 | if (tp->t_rextents_delta != 0) { | |
602 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 603 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
604 | msbp++; |
605 | } | |
606 | if (tp->t_rextslog_delta != 0) { | |
607 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 608 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
609 | msbp++; |
610 | } | |
611 | } | |
612 | ||
613 | /* | |
614 | * If we need to change anything, do it. | |
615 | */ | |
616 | if (msbp > msb) { | |
617 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
618 | (uint)(msbp - msb), rsvd); | |
1b040712 | 619 | if (error) |
bab98bbe | 620 | goto out_undo_frextents; |
1da177e4 | 621 | } |
1b040712 CH |
622 | |
623 | return; | |
624 | ||
bab98bbe DC |
625 | out_undo_frextents: |
626 | if (rtxdelta) | |
627 | xfs_mod_frextents(mp, -rtxdelta); | |
628 | out_undo_ifree: | |
1b040712 | 629 | if (ifreedelta) |
e88b64ea | 630 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
631 | out_undo_icount: |
632 | if (idelta) | |
501ab323 | 633 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
634 | out_undo_fdblocks: |
635 | if (blkdelta) | |
0d485ada | 636 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 637 | out: |
1884bd83 | 638 | ASSERT(error == 0); |
1b040712 | 639 | return; |
1da177e4 LT |
640 | } |
641 | ||
e98c414f CH |
642 | /* |
643 | * Add the given log item to the transaction's list of log items. | |
644 | * | |
645 | * The log item will now point to its new descriptor with its li_desc field. | |
646 | */ | |
647 | void | |
648 | xfs_trans_add_item( | |
649 | struct xfs_trans *tp, | |
650 | struct xfs_log_item *lip) | |
651 | { | |
652 | struct xfs_log_item_desc *lidp; | |
653 | ||
f65020a8 JJ |
654 | ASSERT(lip->li_mountp == tp->t_mountp); |
655 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 656 | |
43869706 | 657 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
658 | |
659 | lidp->lid_item = lip; | |
660 | lidp->lid_flags = 0; | |
e98c414f CH |
661 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
662 | ||
663 | lip->li_desc = lidp; | |
664 | } | |
665 | ||
666 | STATIC void | |
667 | xfs_trans_free_item_desc( | |
668 | struct xfs_log_item_desc *lidp) | |
669 | { | |
670 | list_del_init(&lidp->lid_trans); | |
671 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
672 | } | |
673 | ||
674 | /* | |
675 | * Unlink and free the given descriptor. | |
676 | */ | |
677 | void | |
678 | xfs_trans_del_item( | |
679 | struct xfs_log_item *lip) | |
680 | { | |
681 | xfs_trans_free_item_desc(lip->li_desc); | |
682 | lip->li_desc = NULL; | |
683 | } | |
684 | ||
685 | /* | |
686 | * Unlock all of the items of a transaction and free all the descriptors | |
687 | * of that transaction. | |
688 | */ | |
d17c701c | 689 | void |
e98c414f CH |
690 | xfs_trans_free_items( |
691 | struct xfs_trans *tp, | |
692 | xfs_lsn_t commit_lsn, | |
693 | int flags) | |
694 | { | |
695 | struct xfs_log_item_desc *lidp, *next; | |
696 | ||
697 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
698 | struct xfs_log_item *lip = lidp->lid_item; | |
699 | ||
700 | lip->li_desc = NULL; | |
701 | ||
702 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 703 | lip->li_ops->iop_committing(lip, commit_lsn); |
e98c414f CH |
704 | if (flags & XFS_TRANS_ABORT) |
705 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 706 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
707 | |
708 | xfs_trans_free_item_desc(lidp); | |
709 | } | |
710 | } | |
711 | ||
0e57f6a3 DC |
712 | static inline void |
713 | xfs_log_item_batch_insert( | |
714 | struct xfs_ail *ailp, | |
1d8c95a3 | 715 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
716 | struct xfs_log_item **log_items, |
717 | int nr_items, | |
718 | xfs_lsn_t commit_lsn) | |
719 | { | |
720 | int i; | |
721 | ||
722 | spin_lock(&ailp->xa_lock); | |
723 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 724 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 725 | |
904c17e6 DC |
726 | for (i = 0; i < nr_items; i++) { |
727 | struct xfs_log_item *lip = log_items[i]; | |
728 | ||
729 | lip->li_ops->iop_unpin(lip, 0); | |
730 | } | |
0e57f6a3 DC |
731 | } |
732 | ||
733 | /* | |
734 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
735 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
736 | * minimise lock traffic. | |
e34a314c DC |
737 | * |
738 | * If we are called with the aborted flag set, it is because a log write during | |
739 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 740 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
741 | * means that checkpoint commit abort handling is treated exactly the same |
742 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
743 | * this case all we need to do is iop_committed processing, followed by an |
744 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
745 | * |
746 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
747 | * at the end of the AIL, the insert cursor avoids the need to walk | |
748 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
749 | * call. This saves a lot of needless list walking and is a net win, even | |
750 | * though it slightly increases that amount of AIL lock traffic to set it up | |
751 | * and tear it down. | |
0e57f6a3 DC |
752 | */ |
753 | void | |
754 | xfs_trans_committed_bulk( | |
755 | struct xfs_ail *ailp, | |
756 | struct xfs_log_vec *log_vector, | |
757 | xfs_lsn_t commit_lsn, | |
758 | int aborted) | |
759 | { | |
760 | #define LOG_ITEM_BATCH_SIZE 32 | |
761 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
762 | struct xfs_log_vec *lv; | |
1d8c95a3 | 763 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
764 | int i = 0; |
765 | ||
1d8c95a3 DC |
766 | spin_lock(&ailp->xa_lock); |
767 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
768 | spin_unlock(&ailp->xa_lock); | |
769 | ||
0e57f6a3 DC |
770 | /* unpin all the log items */ |
771 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
772 | struct xfs_log_item *lip = lv->lv_item; | |
773 | xfs_lsn_t item_lsn; | |
774 | ||
775 | if (aborted) | |
776 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 777 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 778 | |
1316d4da | 779 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
780 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
781 | continue; | |
782 | ||
e34a314c DC |
783 | /* |
784 | * if we are aborting the operation, no point in inserting the | |
785 | * object into the AIL as we are in a shutdown situation. | |
786 | */ | |
787 | if (aborted) { | |
788 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 789 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
790 | continue; |
791 | } | |
792 | ||
0e57f6a3 DC |
793 | if (item_lsn != commit_lsn) { |
794 | ||
795 | /* | |
796 | * Not a bulk update option due to unusual item_lsn. | |
797 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
798 | * we have the ail lock. Then unpin the item. This does |
799 | * not affect the AIL cursor the bulk insert path is | |
800 | * using. | |
0e57f6a3 DC |
801 | */ |
802 | spin_lock(&ailp->xa_lock); | |
803 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
804 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
805 | else | |
806 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 807 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
808 | continue; |
809 | } | |
810 | ||
811 | /* Item is a candidate for bulk AIL insert. */ | |
812 | log_items[i++] = lv->lv_item; | |
813 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 814 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
815 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
816 | i = 0; | |
817 | } | |
818 | } | |
819 | ||
820 | /* make sure we insert the remainder! */ | |
821 | if (i) | |
1d8c95a3 DC |
822 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
823 | ||
824 | spin_lock(&ailp->xa_lock); | |
e4a1e29c | 825 | xfs_trans_ail_cursor_done(&cur); |
1d8c95a3 | 826 | spin_unlock(&ailp->xa_lock); |
0e57f6a3 DC |
827 | } |
828 | ||
0924378a | 829 | /* |
b1037058 | 830 | * Commit the given transaction to the log. |
0924378a DC |
831 | * |
832 | * XFS disk error handling mechanism is not based on a typical | |
833 | * transaction abort mechanism. Logically after the filesystem | |
834 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
835 | * be durable - ie. committed to disk - because some metadata might | |
836 | * be inconsistent. In such cases, this returns an error, and the | |
837 | * caller may assume that all locked objects joined to the transaction | |
838 | * have already been unlocked as if the commit had succeeded. | |
839 | * Do not reference the transaction structure after this call. | |
840 | */ | |
0924378a | 841 | int |
b1037058 | 842 | xfs_trans_commit( |
a3ccd2ca | 843 | struct xfs_trans *tp, |
b1037058 | 844 | uint flags) |
0924378a | 845 | { |
a3ccd2ca | 846 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 847 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 848 | int error = 0; |
0924378a DC |
849 | int log_flags = 0; |
850 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
851 | |
852 | /* | |
853 | * Determine whether this commit is releasing a permanent | |
854 | * log reservation or not. | |
855 | */ | |
856 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
857 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
858 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
859 | } | |
860 | ||
861 | /* | |
862 | * If there is nothing to be logged by the transaction, | |
863 | * then unlock all of the items associated with the | |
864 | * transaction and free the transaction structure. | |
865 | * Also make sure to return any reserved blocks to | |
866 | * the free pool. | |
867 | */ | |
a3ccd2ca CH |
868 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
869 | goto out_unreserve; | |
870 | ||
871 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 872 | error = -EIO; |
a3ccd2ca | 873 | goto out_unreserve; |
0924378a | 874 | } |
a3ccd2ca | 875 | |
0924378a DC |
876 | ASSERT(tp->t_ticket != NULL); |
877 | ||
878 | /* | |
879 | * If we need to update the superblock, then do it now. | |
880 | */ | |
881 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
882 | xfs_trans_apply_sb_deltas(tp); | |
883 | xfs_trans_apply_dquot_deltas(tp); | |
884 | ||
c6f97264 | 885 | xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
1da177e4 | 886 | |
0244b960 CH |
887 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
888 | xfs_trans_free(tp); | |
889 | ||
1da177e4 LT |
890 | /* |
891 | * If the transaction needs to be synchronous, then force the | |
892 | * log out now and wait for it. | |
893 | */ | |
894 | if (sync) { | |
c6f97264 | 895 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
1da177e4 LT |
896 | XFS_STATS_INC(xs_trans_sync); |
897 | } else { | |
898 | XFS_STATS_INC(xs_trans_async); | |
899 | } | |
900 | ||
a3ccd2ca CH |
901 | return error; |
902 | ||
903 | out_unreserve: | |
904 | xfs_trans_unreserve_and_mod_sb(tp); | |
905 | ||
906 | /* | |
907 | * It is indeed possible for the transaction to be not dirty but | |
908 | * the dqinfo portion to be. All that means is that we have some | |
909 | * (non-persistent) quota reservations that need to be unreserved. | |
910 | */ | |
911 | xfs_trans_unreserve_and_mod_dquots(tp); | |
912 | if (tp->t_ticket) { | |
913 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
914 | if (commit_lsn == -1 && !error) | |
2451337d | 915 | error = -EIO; |
a3ccd2ca CH |
916 | } |
917 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 918 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
919 | xfs_trans_free(tp); |
920 | ||
921 | XFS_STATS_INC(xs_trans_empty); | |
922 | return error; | |
1da177e4 LT |
923 | } |
924 | ||
1da177e4 LT |
925 | /* |
926 | * Unlock all of the transaction's items and free the transaction. | |
927 | * The transaction must not have modified any of its items, because | |
928 | * there is no way to restore them to their previous state. | |
929 | * | |
930 | * If the transaction has made a log reservation, make sure to release | |
931 | * it as well. | |
932 | */ | |
933 | void | |
934 | xfs_trans_cancel( | |
935 | xfs_trans_t *tp, | |
936 | int flags) | |
937 | { | |
938 | int log_flags; | |
0733af21 | 939 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
940 | |
941 | /* | |
942 | * See if the caller is being too lazy to figure out if | |
943 | * the transaction really needs an abort. | |
944 | */ | |
945 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
946 | flags &= ~XFS_TRANS_ABORT; | |
947 | /* | |
948 | * See if the caller is relying on us to shut down the | |
949 | * filesystem. This happens in paths where we detect | |
950 | * corruption and decide to give up. | |
951 | */ | |
60a204f0 | 952 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 953 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 954 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 955 | } |
1da177e4 | 956 | #ifdef DEBUG |
e98c414f CH |
957 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
958 | struct xfs_log_item_desc *lidp; | |
959 | ||
960 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
961 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
962 | } |
963 | #endif | |
964 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 965 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
966 | |
967 | if (tp->t_ticket) { | |
968 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
969 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
970 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
971 | } else { | |
972 | log_flags = 0; | |
973 | } | |
0733af21 | 974 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
975 | } |
976 | ||
977 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 978 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 979 | |
71e330b5 | 980 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
981 | xfs_trans_free(tp); |
982 | } | |
983 | ||
322ff6b8 NS |
984 | /* |
985 | * Roll from one trans in the sequence of PERMANENT transactions to | |
986 | * the next: permanent transactions are only flushed out when | |
987 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
988 | * as possible to let chunks of it go to the log. So we commit the | |
989 | * chunk we've been working on and get a new transaction to continue. | |
990 | */ | |
991 | int | |
992 | xfs_trans_roll( | |
993 | struct xfs_trans **tpp, | |
994 | struct xfs_inode *dp) | |
995 | { | |
996 | struct xfs_trans *trans; | |
3d3c8b52 | 997 | struct xfs_trans_res tres; |
322ff6b8 NS |
998 | int error; |
999 | ||
1000 | /* | |
1001 | * Ensure that the inode is always logged. | |
1002 | */ | |
1003 | trans = *tpp; | |
1004 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1005 | ||
1006 | /* | |
1007 | * Copy the critical parameters from one trans to the next. | |
1008 | */ | |
3d3c8b52 JL |
1009 | tres.tr_logres = trans->t_log_res; |
1010 | tres.tr_logcount = trans->t_log_count; | |
322ff6b8 NS |
1011 | *tpp = xfs_trans_dup(trans); |
1012 | ||
1013 | /* | |
1014 | * Commit the current transaction. | |
1015 | * If this commit failed, then it'd just unlock those items that | |
1016 | * are not marked ihold. That also means that a filesystem shutdown | |
1017 | * is in progress. The caller takes the responsibility to cancel | |
1018 | * the duplicate transaction that gets returned. | |
1019 | */ | |
1020 | error = xfs_trans_commit(trans, 0); | |
1021 | if (error) | |
d99831ff | 1022 | return error; |
322ff6b8 NS |
1023 | |
1024 | trans = *tpp; | |
1025 | ||
cc09c0dc DC |
1026 | /* |
1027 | * transaction commit worked ok so we can drop the extra ticket | |
1028 | * reference that we gained in xfs_trans_dup() | |
1029 | */ | |
1030 | xfs_log_ticket_put(trans->t_ticket); | |
1031 | ||
1032 | ||
322ff6b8 NS |
1033 | /* |
1034 | * Reserve space in the log for th next transaction. | |
1035 | * This also pushes items in the "AIL", the list of logged items, | |
1036 | * out to disk if they are taking up space at the tail of the log | |
1037 | * that we want to use. This requires that either nothing be locked | |
1038 | * across this call, or that anything that is locked be logged in | |
1039 | * the prior and the next transactions. | |
1040 | */ | |
3d3c8b52 JL |
1041 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
1042 | error = xfs_trans_reserve(trans, &tres, 0, 0); | |
322ff6b8 NS |
1043 | /* |
1044 | * Ensure that the inode is in the new transaction and locked. | |
1045 | */ | |
1046 | if (error) | |
1047 | return error; | |
1048 | ||
ddc3415a | 1049 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1050 | return 0; |
1051 | } |