Commit | Line | Data |
---|---|---|
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 | ||
b1c1b5b6 DC |
49 | /* |
50 | * Free the transaction structure. If there is more clean up | |
51 | * to do when the structure is freed, add it here. | |
52 | */ | |
53 | STATIC void | |
54 | xfs_trans_free( | |
ed3b4d6c | 55 | struct xfs_trans *tp) |
b1c1b5b6 | 56 | { |
4ecbfe63 DC |
57 | xfs_extent_busy_sort(&tp->t_busy); |
58 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 59 | |
b1c1b5b6 | 60 | atomic_dec(&tp->t_mountp->m_active_trans); |
253f4911 | 61 | if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT)) |
d9457dc0 | 62 | sb_end_intwrite(tp->t_mountp->m_super); |
b1c1b5b6 DC |
63 | xfs_trans_free_dqinfo(tp); |
64 | kmem_zone_free(xfs_trans_zone, tp); | |
65 | } | |
66 | ||
1da177e4 LT |
67 | /* |
68 | * This is called to create a new transaction which will share the | |
69 | * permanent log reservation of the given transaction. The remaining | |
70 | * unused block and rt extent reservations are also inherited. This | |
71 | * implies that the original transaction is no longer allowed to allocate | |
72 | * blocks. Locks and log items, however, are no inherited. They must | |
73 | * be added to the new transaction explicitly. | |
74 | */ | |
2e6db6c4 | 75 | STATIC xfs_trans_t * |
1da177e4 LT |
76 | xfs_trans_dup( |
77 | xfs_trans_t *tp) | |
78 | { | |
79 | xfs_trans_t *ntp; | |
80 | ||
81 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
82 | ||
83 | /* | |
84 | * Initialize the new transaction structure. | |
85 | */ | |
2a3c0acc | 86 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 | 87 | ntp->t_mountp = tp->t_mountp; |
e98c414f | 88 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 89 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
90 | |
91 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 92 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 93 | |
d9457dc0 JK |
94 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
95 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
253f4911 | 96 | (tp->t_flags & XFS_TRANS_NO_WRITECOUNT); |
d9457dc0 | 97 | /* We gave our writer reference to the new transaction */ |
253f4911 | 98 | tp->t_flags |= XFS_TRANS_NO_WRITECOUNT; |
cc09c0dc | 99 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
100 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
101 | tp->t_blk_res = tp->t_blk_res_used; | |
102 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
103 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 104 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 105 | |
7d095257 | 106 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
107 | |
108 | atomic_inc(&tp->t_mountp->m_active_trans); | |
109 | return ntp; | |
110 | } | |
111 | ||
112 | /* | |
113 | * This is called to reserve free disk blocks and log space for the | |
114 | * given transaction. This must be done before allocating any resources | |
115 | * within the transaction. | |
116 | * | |
117 | * This will return ENOSPC if there are not enough blocks available. | |
118 | * It will sleep waiting for available log space. | |
119 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
120 | * is used by long running transactions. If any one of the reservations | |
121 | * fails then they will all be backed out. | |
122 | * | |
123 | * This does not do quota reservations. That typically is done by the | |
124 | * caller afterwards. | |
125 | */ | |
253f4911 | 126 | static int |
1da177e4 | 127 | xfs_trans_reserve( |
3d3c8b52 JL |
128 | struct xfs_trans *tp, |
129 | struct xfs_trans_res *resp, | |
130 | uint blocks, | |
131 | uint rtextents) | |
1da177e4 | 132 | { |
59c1b082 | 133 | int error = 0; |
0d485ada | 134 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
1da177e4 LT |
135 | |
136 | /* Mark this thread as being in a transaction */ | |
9070733b | 137 | current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 LT |
138 | |
139 | /* | |
140 | * Attempt to reserve the needed disk blocks by decrementing | |
141 | * the number needed from the number available. This will | |
142 | * fail if the count would go below zero. | |
143 | */ | |
144 | if (blocks > 0) { | |
0d485ada | 145 | error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 | 146 | if (error != 0) { |
9070733b | 147 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
2451337d | 148 | return -ENOSPC; |
1da177e4 LT |
149 | } |
150 | tp->t_blk_res += blocks; | |
151 | } | |
152 | ||
153 | /* | |
154 | * Reserve the log space needed for this transaction. | |
155 | */ | |
3d3c8b52 | 156 | if (resp->tr_logres > 0) { |
9006fb91 CH |
157 | bool permanent = false; |
158 | ||
3d3c8b52 JL |
159 | ASSERT(tp->t_log_res == 0 || |
160 | tp->t_log_res == resp->tr_logres); | |
161 | ASSERT(tp->t_log_count == 0 || | |
162 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 163 | |
3d3c8b52 | 164 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 165 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 166 | permanent = true; |
1da177e4 LT |
167 | } else { |
168 | ASSERT(tp->t_ticket == NULL); | |
169 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
170 | } |
171 | ||
9006fb91 | 172 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 173 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
174 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
175 | } else { | |
3d3c8b52 JL |
176 | error = xfs_log_reserve(tp->t_mountp, |
177 | resp->tr_logres, | |
178 | resp->tr_logcount, | |
179 | &tp->t_ticket, XFS_TRANSACTION, | |
710b1e2c | 180 | permanent); |
1da177e4 | 181 | } |
9006fb91 CH |
182 | |
183 | if (error) | |
184 | goto undo_blocks; | |
185 | ||
3d3c8b52 JL |
186 | tp->t_log_res = resp->tr_logres; |
187 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
188 | } |
189 | ||
190 | /* | |
191 | * Attempt to reserve the needed realtime extents by decrementing | |
192 | * the number needed from the number available. This will | |
193 | * fail if the count would go below zero. | |
194 | */ | |
195 | if (rtextents > 0) { | |
bab98bbe | 196 | error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents)); |
1da177e4 | 197 | if (error) { |
2451337d | 198 | error = -ENOSPC; |
1da177e4 LT |
199 | goto undo_log; |
200 | } | |
201 | tp->t_rtx_res += rtextents; | |
202 | } | |
203 | ||
204 | return 0; | |
205 | ||
206 | /* | |
207 | * Error cases jump to one of these labels to undo any | |
208 | * reservations which have already been performed. | |
209 | */ | |
210 | undo_log: | |
3d3c8b52 | 211 | if (resp->tr_logres > 0) { |
f78c3901 | 212 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false); |
1da177e4 LT |
213 | tp->t_ticket = NULL; |
214 | tp->t_log_res = 0; | |
215 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
216 | } | |
217 | ||
218 | undo_blocks: | |
219 | if (blocks > 0) { | |
a27f6ef4 | 220 | xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd); |
1da177e4 LT |
221 | tp->t_blk_res = 0; |
222 | } | |
223 | ||
9070733b | 224 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 225 | |
59c1b082 | 226 | return error; |
1da177e4 LT |
227 | } |
228 | ||
253f4911 CH |
229 | int |
230 | xfs_trans_alloc( | |
231 | struct xfs_mount *mp, | |
232 | struct xfs_trans_res *resp, | |
233 | uint blocks, | |
234 | uint rtextents, | |
235 | uint flags, | |
236 | struct xfs_trans **tpp) | |
237 | { | |
238 | struct xfs_trans *tp; | |
239 | int error; | |
240 | ||
241 | if (!(flags & XFS_TRANS_NO_WRITECOUNT)) | |
242 | sb_start_intwrite(mp->m_super); | |
243 | ||
244 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); | |
245 | atomic_inc(&mp->m_active_trans); | |
246 | ||
247 | tp = kmem_zone_zalloc(xfs_trans_zone, | |
248 | (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); | |
249 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; | |
250 | tp->t_flags = flags; | |
251 | tp->t_mountp = mp; | |
252 | INIT_LIST_HEAD(&tp->t_items); | |
253 | INIT_LIST_HEAD(&tp->t_busy); | |
254 | ||
255 | error = xfs_trans_reserve(tp, resp, blocks, rtextents); | |
256 | if (error) { | |
257 | xfs_trans_cancel(tp); | |
258 | return error; | |
259 | } | |
260 | ||
261 | *tpp = tp; | |
262 | return 0; | |
263 | } | |
264 | ||
e89c0413 DW |
265 | /* |
266 | * Create an empty transaction with no reservation. This is a defensive | |
267 | * mechanism for routines that query metadata without actually modifying | |
268 | * them -- if the metadata being queried is somehow cross-linked (think a | |
269 | * btree block pointer that points higher in the tree), we risk deadlock. | |
270 | * However, blocks grabbed as part of a transaction can be re-grabbed. | |
271 | * The verifiers will notice the corrupt block and the operation will fail | |
272 | * back to userspace without deadlocking. | |
273 | * | |
274 | * Note the zero-length reservation; this transaction MUST be cancelled | |
275 | * without any dirty data. | |
276 | */ | |
277 | int | |
278 | xfs_trans_alloc_empty( | |
279 | struct xfs_mount *mp, | |
280 | struct xfs_trans **tpp) | |
281 | { | |
282 | struct xfs_trans_res resv = {0}; | |
283 | ||
284 | return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp); | |
285 | } | |
286 | ||
1da177e4 LT |
287 | /* |
288 | * Record the indicated change to the given field for application | |
289 | * to the file system's superblock when the transaction commits. | |
290 | * For now, just store the change in the transaction structure. | |
291 | * | |
292 | * Mark the transaction structure to indicate that the superblock | |
293 | * needs to be updated before committing. | |
92821e2b DC |
294 | * |
295 | * Because we may not be keeping track of allocated/free inodes and | |
296 | * used filesystem blocks in the superblock, we do not mark the | |
297 | * superblock dirty in this transaction if we modify these fields. | |
298 | * We still need to update the transaction deltas so that they get | |
299 | * applied to the incore superblock, but we don't want them to | |
300 | * cause the superblock to get locked and logged if these are the | |
301 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
302 | */ |
303 | void | |
304 | xfs_trans_mod_sb( | |
305 | xfs_trans_t *tp, | |
306 | uint field, | |
20f4ebf2 | 307 | int64_t delta) |
1da177e4 | 308 | { |
92821e2b DC |
309 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
310 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
311 | |
312 | switch (field) { | |
313 | case XFS_TRANS_SB_ICOUNT: | |
314 | tp->t_icount_delta += delta; | |
92821e2b DC |
315 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
316 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
317 | break; |
318 | case XFS_TRANS_SB_IFREE: | |
319 | tp->t_ifree_delta += delta; | |
92821e2b DC |
320 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
321 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
322 | break; |
323 | case XFS_TRANS_SB_FDBLOCKS: | |
324 | /* | |
325 | * Track the number of blocks allocated in the | |
326 | * transaction. Make sure it does not exceed the | |
327 | * number reserved. | |
328 | */ | |
329 | if (delta < 0) { | |
330 | tp->t_blk_res_used += (uint)-delta; | |
331 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
332 | } | |
333 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
334 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
335 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
336 | break; |
337 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
338 | /* | |
339 | * The allocation has already been applied to the | |
340 | * in-core superblock's counter. This should only | |
341 | * be applied to the on-disk superblock. | |
342 | */ | |
1da177e4 | 343 | tp->t_res_fdblocks_delta += delta; |
92821e2b DC |
344 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
345 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
346 | break; |
347 | case XFS_TRANS_SB_FREXTENTS: | |
348 | /* | |
349 | * Track the number of blocks allocated in the | |
350 | * transaction. Make sure it does not exceed the | |
351 | * number reserved. | |
352 | */ | |
353 | if (delta < 0) { | |
354 | tp->t_rtx_res_used += (uint)-delta; | |
355 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
356 | } | |
357 | tp->t_frextents_delta += delta; | |
358 | break; | |
359 | case XFS_TRANS_SB_RES_FREXTENTS: | |
360 | /* | |
361 | * The allocation has already been applied to the | |
c41564b5 | 362 | * in-core superblock's counter. This should only |
1da177e4 LT |
363 | * be applied to the on-disk superblock. |
364 | */ | |
365 | ASSERT(delta < 0); | |
366 | tp->t_res_frextents_delta += delta; | |
367 | break; | |
368 | case XFS_TRANS_SB_DBLOCKS: | |
369 | ASSERT(delta > 0); | |
370 | tp->t_dblocks_delta += delta; | |
371 | break; | |
372 | case XFS_TRANS_SB_AGCOUNT: | |
373 | ASSERT(delta > 0); | |
374 | tp->t_agcount_delta += delta; | |
375 | break; | |
376 | case XFS_TRANS_SB_IMAXPCT: | |
377 | tp->t_imaxpct_delta += delta; | |
378 | break; | |
379 | case XFS_TRANS_SB_REXTSIZE: | |
380 | tp->t_rextsize_delta += delta; | |
381 | break; | |
382 | case XFS_TRANS_SB_RBMBLOCKS: | |
383 | tp->t_rbmblocks_delta += delta; | |
384 | break; | |
385 | case XFS_TRANS_SB_RBLOCKS: | |
386 | tp->t_rblocks_delta += delta; | |
387 | break; | |
388 | case XFS_TRANS_SB_REXTENTS: | |
389 | tp->t_rextents_delta += delta; | |
390 | break; | |
391 | case XFS_TRANS_SB_REXTSLOG: | |
392 | tp->t_rextslog_delta += delta; | |
393 | break; | |
394 | default: | |
395 | ASSERT(0); | |
396 | return; | |
397 | } | |
398 | ||
210c6f1c | 399 | tp->t_flags |= flags; |
1da177e4 LT |
400 | } |
401 | ||
402 | /* | |
403 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
404 | * to bring the superblock buffer into the current transaction | |
405 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
406 | * | |
407 | * For now we just look at each field allowed to change and change | |
408 | * it if necessary. | |
409 | */ | |
410 | STATIC void | |
411 | xfs_trans_apply_sb_deltas( | |
412 | xfs_trans_t *tp) | |
413 | { | |
2bdf7cd0 | 414 | xfs_dsb_t *sbp; |
1da177e4 LT |
415 | xfs_buf_t *bp; |
416 | int whole = 0; | |
417 | ||
418 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
419 | sbp = XFS_BUF_TO_SBP(bp); | |
420 | ||
421 | /* | |
422 | * Check that superblock mods match the mods made to AGF counters. | |
423 | */ | |
424 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
425 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
426 | tp->t_ag_btree_delta)); | |
427 | ||
92821e2b DC |
428 | /* |
429 | * Only update the superblock counters if we are logging them | |
430 | */ | |
431 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 432 | if (tp->t_icount_delta) |
413d57c9 | 433 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 434 | if (tp->t_ifree_delta) |
413d57c9 | 435 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 436 | if (tp->t_fdblocks_delta) |
413d57c9 | 437 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 438 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 439 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
440 | } |
441 | ||
2bdf7cd0 | 442 | if (tp->t_frextents_delta) |
413d57c9 | 443 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 444 | if (tp->t_res_frextents_delta) |
413d57c9 | 445 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
446 | |
447 | if (tp->t_dblocks_delta) { | |
413d57c9 | 448 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
449 | whole = 1; |
450 | } | |
2bdf7cd0 | 451 | if (tp->t_agcount_delta) { |
413d57c9 | 452 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
453 | whole = 1; |
454 | } | |
2bdf7cd0 CH |
455 | if (tp->t_imaxpct_delta) { |
456 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
457 | whole = 1; |
458 | } | |
2bdf7cd0 | 459 | if (tp->t_rextsize_delta) { |
413d57c9 | 460 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
461 | whole = 1; |
462 | } | |
2bdf7cd0 | 463 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 464 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
465 | whole = 1; |
466 | } | |
2bdf7cd0 | 467 | if (tp->t_rblocks_delta) { |
413d57c9 | 468 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
469 | whole = 1; |
470 | } | |
2bdf7cd0 | 471 | if (tp->t_rextents_delta) { |
413d57c9 | 472 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
473 | whole = 1; |
474 | } | |
2bdf7cd0 CH |
475 | if (tp->t_rextslog_delta) { |
476 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
477 | whole = 1; |
478 | } | |
479 | ||
3443a3bc | 480 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
481 | if (whole) |
482 | /* | |
c41564b5 | 483 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 484 | */ |
2bdf7cd0 | 485 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
486 | else |
487 | /* | |
488 | * Since all the modifiable fields are contiguous, we | |
489 | * can get away with this. | |
490 | */ | |
2bdf7cd0 CH |
491 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
492 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 493 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
494 | } |
495 | ||
0bd5dded DC |
496 | STATIC int |
497 | xfs_sb_mod8( | |
498 | uint8_t *field, | |
499 | int8_t delta) | |
500 | { | |
501 | int8_t counter = *field; | |
502 | ||
503 | counter += delta; | |
504 | if (counter < 0) { | |
505 | ASSERT(0); | |
506 | return -EINVAL; | |
507 | } | |
508 | *field = counter; | |
509 | return 0; | |
510 | } | |
511 | ||
512 | STATIC int | |
513 | xfs_sb_mod32( | |
514 | uint32_t *field, | |
515 | int32_t delta) | |
516 | { | |
517 | int32_t counter = *field; | |
518 | ||
519 | counter += delta; | |
520 | if (counter < 0) { | |
521 | ASSERT(0); | |
522 | return -EINVAL; | |
523 | } | |
524 | *field = counter; | |
525 | return 0; | |
526 | } | |
527 | ||
528 | STATIC int | |
529 | xfs_sb_mod64( | |
530 | uint64_t *field, | |
531 | int64_t delta) | |
532 | { | |
533 | int64_t counter = *field; | |
534 | ||
535 | counter += delta; | |
536 | if (counter < 0) { | |
537 | ASSERT(0); | |
538 | return -EINVAL; | |
539 | } | |
540 | *field = counter; | |
541 | return 0; | |
542 | } | |
543 | ||
1da177e4 | 544 | /* |
45c34141 DC |
545 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
546 | * and apply superblock counter changes to the in-core superblock. The | |
547 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
548 | * applied to the in-core superblock. The idea is that that has already been | |
549 | * done. | |
1da177e4 | 550 | * |
45c34141 DC |
551 | * If we are not logging superblock counters, then the inode allocated/free and |
552 | * used block counts are not updated in the on disk superblock. In this case, | |
553 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
554 | * still need to update the incore superblock with the changes. | |
1da177e4 | 555 | */ |
71e330b5 | 556 | void |
1da177e4 | 557 | xfs_trans_unreserve_and_mod_sb( |
0bd5dded | 558 | struct xfs_trans *tp) |
1da177e4 | 559 | { |
0bd5dded DC |
560 | struct xfs_mount *mp = tp->t_mountp; |
561 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
562 | int64_t blkdelta = 0; | |
563 | int64_t rtxdelta = 0; | |
564 | int64_t idelta = 0; | |
565 | int64_t ifreedelta = 0; | |
566 | int error; | |
1da177e4 | 567 | |
1b040712 | 568 | /* calculate deltas */ |
45c34141 DC |
569 | if (tp->t_blk_res > 0) |
570 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
571 | if ((tp->t_fdblocks_delta != 0) && |
572 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
573 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
574 | blkdelta += tp->t_fdblocks_delta; | |
575 | ||
45c34141 DC |
576 | if (tp->t_rtx_res > 0) |
577 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
578 | if ((tp->t_frextents_delta != 0) && |
579 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
580 | rtxdelta += tp->t_frextents_delta; | |
581 | ||
1b040712 CH |
582 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
583 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
584 | idelta = tp->t_icount_delta; | |
585 | ifreedelta = tp->t_ifree_delta; | |
586 | } | |
587 | ||
588 | /* apply the per-cpu counters */ | |
589 | if (blkdelta) { | |
0d485ada | 590 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
591 | if (error) |
592 | goto out; | |
593 | } | |
594 | ||
595 | if (idelta) { | |
501ab323 | 596 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
597 | if (error) |
598 | goto out_undo_fdblocks; | |
599 | } | |
600 | ||
601 | if (ifreedelta) { | |
e88b64ea | 602 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
603 | if (error) |
604 | goto out_undo_icount; | |
605 | } | |
606 | ||
0bd5dded DC |
607 | if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY)) |
608 | return; | |
609 | ||
1b040712 | 610 | /* apply remaining deltas */ |
0bd5dded | 611 | spin_lock(&mp->m_sb_lock); |
bab98bbe | 612 | if (rtxdelta) { |
0bd5dded | 613 | error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta); |
bab98bbe DC |
614 | if (error) |
615 | goto out_undo_ifree; | |
1da177e4 LT |
616 | } |
617 | ||
0bd5dded DC |
618 | if (tp->t_dblocks_delta != 0) { |
619 | error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta); | |
1b040712 | 620 | if (error) |
bab98bbe | 621 | goto out_undo_frextents; |
1da177e4 | 622 | } |
0bd5dded DC |
623 | if (tp->t_agcount_delta != 0) { |
624 | error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta); | |
625 | if (error) | |
626 | goto out_undo_dblocks; | |
627 | } | |
628 | if (tp->t_imaxpct_delta != 0) { | |
629 | error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta); | |
630 | if (error) | |
631 | goto out_undo_agcount; | |
632 | } | |
633 | if (tp->t_rextsize_delta != 0) { | |
634 | error = xfs_sb_mod32(&mp->m_sb.sb_rextsize, | |
635 | tp->t_rextsize_delta); | |
636 | if (error) | |
637 | goto out_undo_imaxpct; | |
638 | } | |
639 | if (tp->t_rbmblocks_delta != 0) { | |
640 | error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, | |
641 | tp->t_rbmblocks_delta); | |
642 | if (error) | |
643 | goto out_undo_rextsize; | |
644 | } | |
645 | if (tp->t_rblocks_delta != 0) { | |
646 | error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta); | |
647 | if (error) | |
648 | goto out_undo_rbmblocks; | |
649 | } | |
650 | if (tp->t_rextents_delta != 0) { | |
651 | error = xfs_sb_mod64(&mp->m_sb.sb_rextents, | |
652 | tp->t_rextents_delta); | |
653 | if (error) | |
654 | goto out_undo_rblocks; | |
655 | } | |
656 | if (tp->t_rextslog_delta != 0) { | |
657 | error = xfs_sb_mod8(&mp->m_sb.sb_rextslog, | |
658 | tp->t_rextslog_delta); | |
659 | if (error) | |
660 | goto out_undo_rextents; | |
661 | } | |
662 | spin_unlock(&mp->m_sb_lock); | |
1b040712 CH |
663 | return; |
664 | ||
0bd5dded DC |
665 | out_undo_rextents: |
666 | if (tp->t_rextents_delta) | |
667 | xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta); | |
668 | out_undo_rblocks: | |
669 | if (tp->t_rblocks_delta) | |
670 | xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta); | |
671 | out_undo_rbmblocks: | |
672 | if (tp->t_rbmblocks_delta) | |
673 | xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta); | |
674 | out_undo_rextsize: | |
675 | if (tp->t_rextsize_delta) | |
676 | xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta); | |
677 | out_undo_imaxpct: | |
678 | if (tp->t_rextsize_delta) | |
679 | xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta); | |
680 | out_undo_agcount: | |
681 | if (tp->t_agcount_delta) | |
682 | xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta); | |
683 | out_undo_dblocks: | |
684 | if (tp->t_dblocks_delta) | |
685 | xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta); | |
bab98bbe DC |
686 | out_undo_frextents: |
687 | if (rtxdelta) | |
0bd5dded | 688 | xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta); |
bab98bbe | 689 | out_undo_ifree: |
0bd5dded | 690 | spin_unlock(&mp->m_sb_lock); |
1b040712 | 691 | if (ifreedelta) |
e88b64ea | 692 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
693 | out_undo_icount: |
694 | if (idelta) | |
501ab323 | 695 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
696 | out_undo_fdblocks: |
697 | if (blkdelta) | |
0d485ada | 698 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 699 | out: |
1884bd83 | 700 | ASSERT(error == 0); |
1b040712 | 701 | return; |
1da177e4 LT |
702 | } |
703 | ||
e98c414f CH |
704 | /* |
705 | * Add the given log item to the transaction's list of log items. | |
706 | * | |
707 | * The log item will now point to its new descriptor with its li_desc field. | |
708 | */ | |
709 | void | |
710 | xfs_trans_add_item( | |
711 | struct xfs_trans *tp, | |
712 | struct xfs_log_item *lip) | |
713 | { | |
714 | struct xfs_log_item_desc *lidp; | |
715 | ||
f65020a8 JJ |
716 | ASSERT(lip->li_mountp == tp->t_mountp); |
717 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 718 | |
43869706 | 719 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
720 | |
721 | lidp->lid_item = lip; | |
722 | lidp->lid_flags = 0; | |
e98c414f CH |
723 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
724 | ||
725 | lip->li_desc = lidp; | |
726 | } | |
727 | ||
728 | STATIC void | |
729 | xfs_trans_free_item_desc( | |
730 | struct xfs_log_item_desc *lidp) | |
731 | { | |
732 | list_del_init(&lidp->lid_trans); | |
733 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
734 | } | |
735 | ||
736 | /* | |
737 | * Unlink and free the given descriptor. | |
738 | */ | |
739 | void | |
740 | xfs_trans_del_item( | |
741 | struct xfs_log_item *lip) | |
742 | { | |
743 | xfs_trans_free_item_desc(lip->li_desc); | |
744 | lip->li_desc = NULL; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Unlock all of the items of a transaction and free all the descriptors | |
749 | * of that transaction. | |
750 | */ | |
d17c701c | 751 | void |
e98c414f CH |
752 | xfs_trans_free_items( |
753 | struct xfs_trans *tp, | |
754 | xfs_lsn_t commit_lsn, | |
eacb24e7 | 755 | bool abort) |
e98c414f CH |
756 | { |
757 | struct xfs_log_item_desc *lidp, *next; | |
758 | ||
759 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
760 | struct xfs_log_item *lip = lidp->lid_item; | |
761 | ||
762 | lip->li_desc = NULL; | |
763 | ||
764 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 765 | lip->li_ops->iop_committing(lip, commit_lsn); |
eacb24e7 | 766 | if (abort) |
e98c414f | 767 | lip->li_flags |= XFS_LI_ABORTED; |
904c17e6 | 768 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
769 | |
770 | xfs_trans_free_item_desc(lidp); | |
771 | } | |
772 | } | |
773 | ||
0e57f6a3 DC |
774 | static inline void |
775 | xfs_log_item_batch_insert( | |
776 | struct xfs_ail *ailp, | |
1d8c95a3 | 777 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
778 | struct xfs_log_item **log_items, |
779 | int nr_items, | |
780 | xfs_lsn_t commit_lsn) | |
781 | { | |
782 | int i; | |
783 | ||
784 | spin_lock(&ailp->xa_lock); | |
785 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 786 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 787 | |
904c17e6 DC |
788 | for (i = 0; i < nr_items; i++) { |
789 | struct xfs_log_item *lip = log_items[i]; | |
790 | ||
791 | lip->li_ops->iop_unpin(lip, 0); | |
792 | } | |
0e57f6a3 DC |
793 | } |
794 | ||
795 | /* | |
796 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
797 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
798 | * minimise lock traffic. | |
e34a314c DC |
799 | * |
800 | * If we are called with the aborted flag set, it is because a log write during | |
801 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 802 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
803 | * means that checkpoint commit abort handling is treated exactly the same |
804 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
805 | * this case all we need to do is iop_committed processing, followed by an |
806 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
807 | * |
808 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
809 | * at the end of the AIL, the insert cursor avoids the need to walk | |
810 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
811 | * call. This saves a lot of needless list walking and is a net win, even | |
812 | * though it slightly increases that amount of AIL lock traffic to set it up | |
813 | * and tear it down. | |
0e57f6a3 DC |
814 | */ |
815 | void | |
816 | xfs_trans_committed_bulk( | |
817 | struct xfs_ail *ailp, | |
818 | struct xfs_log_vec *log_vector, | |
819 | xfs_lsn_t commit_lsn, | |
820 | int aborted) | |
821 | { | |
822 | #define LOG_ITEM_BATCH_SIZE 32 | |
823 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
824 | struct xfs_log_vec *lv; | |
1d8c95a3 | 825 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
826 | int i = 0; |
827 | ||
1d8c95a3 DC |
828 | spin_lock(&ailp->xa_lock); |
829 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
830 | spin_unlock(&ailp->xa_lock); | |
831 | ||
0e57f6a3 DC |
832 | /* unpin all the log items */ |
833 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
834 | struct xfs_log_item *lip = lv->lv_item; | |
835 | xfs_lsn_t item_lsn; | |
836 | ||
837 | if (aborted) | |
838 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 839 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 840 | |
1316d4da | 841 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
842 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
843 | continue; | |
844 | ||
e34a314c DC |
845 | /* |
846 | * if we are aborting the operation, no point in inserting the | |
847 | * object into the AIL as we are in a shutdown situation. | |
848 | */ | |
849 | if (aborted) { | |
850 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 851 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
852 | continue; |
853 | } | |
854 | ||
0e57f6a3 DC |
855 | if (item_lsn != commit_lsn) { |
856 | ||
857 | /* | |
858 | * Not a bulk update option due to unusual item_lsn. | |
859 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
860 | * we have the ail lock. Then unpin the item. This does |
861 | * not affect the AIL cursor the bulk insert path is | |
862 | * using. | |
0e57f6a3 DC |
863 | */ |
864 | spin_lock(&ailp->xa_lock); | |
865 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
866 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
867 | else | |
868 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 869 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
870 | continue; |
871 | } | |
872 | ||
873 | /* Item is a candidate for bulk AIL insert. */ | |
874 | log_items[i++] = lv->lv_item; | |
875 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 876 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
877 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
878 | i = 0; | |
879 | } | |
880 | } | |
881 | ||
882 | /* make sure we insert the remainder! */ | |
883 | if (i) | |
1d8c95a3 DC |
884 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
885 | ||
886 | spin_lock(&ailp->xa_lock); | |
e4a1e29c | 887 | xfs_trans_ail_cursor_done(&cur); |
1d8c95a3 | 888 | spin_unlock(&ailp->xa_lock); |
0e57f6a3 DC |
889 | } |
890 | ||
0924378a | 891 | /* |
b1037058 | 892 | * Commit the given transaction to the log. |
0924378a DC |
893 | * |
894 | * XFS disk error handling mechanism is not based on a typical | |
895 | * transaction abort mechanism. Logically after the filesystem | |
896 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
897 | * be durable - ie. committed to disk - because some metadata might | |
898 | * be inconsistent. In such cases, this returns an error, and the | |
899 | * caller may assume that all locked objects joined to the transaction | |
900 | * have already been unlocked as if the commit had succeeded. | |
901 | * Do not reference the transaction structure after this call. | |
902 | */ | |
70393313 CH |
903 | static int |
904 | __xfs_trans_commit( | |
a3ccd2ca | 905 | struct xfs_trans *tp, |
70393313 | 906 | bool regrant) |
0924378a | 907 | { |
a3ccd2ca | 908 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 909 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 910 | int error = 0; |
0924378a | 911 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
0924378a | 912 | |
0924378a DC |
913 | /* |
914 | * If there is nothing to be logged by the transaction, | |
915 | * then unlock all of the items associated with the | |
916 | * transaction and free the transaction structure. | |
917 | * Also make sure to return any reserved blocks to | |
918 | * the free pool. | |
919 | */ | |
a3ccd2ca CH |
920 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
921 | goto out_unreserve; | |
922 | ||
923 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 924 | error = -EIO; |
a3ccd2ca | 925 | goto out_unreserve; |
0924378a | 926 | } |
a3ccd2ca | 927 | |
0924378a DC |
928 | ASSERT(tp->t_ticket != NULL); |
929 | ||
930 | /* | |
931 | * If we need to update the superblock, then do it now. | |
932 | */ | |
933 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
934 | xfs_trans_apply_sb_deltas(tp); | |
935 | xfs_trans_apply_dquot_deltas(tp); | |
936 | ||
70393313 | 937 | xfs_log_commit_cil(mp, tp, &commit_lsn, regrant); |
1da177e4 | 938 | |
9070733b | 939 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
0244b960 CH |
940 | xfs_trans_free(tp); |
941 | ||
1da177e4 LT |
942 | /* |
943 | * If the transaction needs to be synchronous, then force the | |
944 | * log out now and wait for it. | |
945 | */ | |
946 | if (sync) { | |
c6f97264 | 947 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
ff6d6af2 | 948 | XFS_STATS_INC(mp, xs_trans_sync); |
1da177e4 | 949 | } else { |
ff6d6af2 | 950 | XFS_STATS_INC(mp, xs_trans_async); |
1da177e4 LT |
951 | } |
952 | ||
a3ccd2ca CH |
953 | return error; |
954 | ||
955 | out_unreserve: | |
956 | xfs_trans_unreserve_and_mod_sb(tp); | |
957 | ||
958 | /* | |
959 | * It is indeed possible for the transaction to be not dirty but | |
960 | * the dqinfo portion to be. All that means is that we have some | |
961 | * (non-persistent) quota reservations that need to be unreserved. | |
962 | */ | |
963 | xfs_trans_unreserve_and_mod_dquots(tp); | |
964 | if (tp->t_ticket) { | |
f78c3901 | 965 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant); |
a3ccd2ca | 966 | if (commit_lsn == -1 && !error) |
2451337d | 967 | error = -EIO; |
a3ccd2ca | 968 | } |
9070733b | 969 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
eacb24e7 | 970 | xfs_trans_free_items(tp, NULLCOMMITLSN, !!error); |
a3ccd2ca CH |
971 | xfs_trans_free(tp); |
972 | ||
ff6d6af2 | 973 | XFS_STATS_INC(mp, xs_trans_empty); |
a3ccd2ca | 974 | return error; |
1da177e4 LT |
975 | } |
976 | ||
70393313 CH |
977 | int |
978 | xfs_trans_commit( | |
979 | struct xfs_trans *tp) | |
980 | { | |
981 | return __xfs_trans_commit(tp, false); | |
982 | } | |
983 | ||
1da177e4 LT |
984 | /* |
985 | * Unlock all of the transaction's items and free the transaction. | |
986 | * The transaction must not have modified any of its items, because | |
987 | * there is no way to restore them to their previous state. | |
988 | * | |
989 | * If the transaction has made a log reservation, make sure to release | |
990 | * it as well. | |
991 | */ | |
992 | void | |
993 | xfs_trans_cancel( | |
4906e215 | 994 | struct xfs_trans *tp) |
1da177e4 | 995 | { |
4906e215 CH |
996 | struct xfs_mount *mp = tp->t_mountp; |
997 | bool dirty = (tp->t_flags & XFS_TRANS_DIRTY); | |
1da177e4 | 998 | |
1da177e4 LT |
999 | /* |
1000 | * See if the caller is relying on us to shut down the | |
1001 | * filesystem. This happens in paths where we detect | |
1002 | * corruption and decide to give up. | |
1003 | */ | |
4906e215 | 1004 | if (dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1005 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1006 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1007 | } |
1da177e4 | 1008 | #ifdef DEBUG |
4906e215 | 1009 | if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
e98c414f CH |
1010 | struct xfs_log_item_desc *lidp; |
1011 | ||
1012 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
1013 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1014 | } |
1015 | #endif | |
1016 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1017 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 | 1018 | |
f78c3901 CH |
1019 | if (tp->t_ticket) |
1020 | xfs_log_done(mp, tp->t_ticket, NULL, false); | |
1da177e4 LT |
1021 | |
1022 | /* mark this thread as no longer being in a transaction */ | |
9070733b | 1023 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 1024 | |
4906e215 | 1025 | xfs_trans_free_items(tp, NULLCOMMITLSN, dirty); |
1da177e4 LT |
1026 | xfs_trans_free(tp); |
1027 | } | |
1028 | ||
322ff6b8 NS |
1029 | /* |
1030 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1031 | * the next: permanent transactions are only flushed out when | |
70393313 | 1032 | * committed with xfs_trans_commit(), but we still want as soon |
322ff6b8 NS |
1033 | * as possible to let chunks of it go to the log. So we commit the |
1034 | * chunk we've been working on and get a new transaction to continue. | |
1035 | */ | |
1036 | int | |
254133f5 | 1037 | xfs_trans_roll( |
411350df | 1038 | struct xfs_trans **tpp) |
322ff6b8 | 1039 | { |
411350df | 1040 | struct xfs_trans *trans = *tpp; |
3d3c8b52 | 1041 | struct xfs_trans_res tres; |
322ff6b8 NS |
1042 | int error; |
1043 | ||
322ff6b8 NS |
1044 | /* |
1045 | * Copy the critical parameters from one trans to the next. | |
1046 | */ | |
3d3c8b52 JL |
1047 | tres.tr_logres = trans->t_log_res; |
1048 | tres.tr_logcount = trans->t_log_count; | |
411350df | 1049 | |
322ff6b8 NS |
1050 | *tpp = xfs_trans_dup(trans); |
1051 | ||
1052 | /* | |
1053 | * Commit the current transaction. | |
1054 | * If this commit failed, then it'd just unlock those items that | |
1055 | * are not marked ihold. That also means that a filesystem shutdown | |
1056 | * is in progress. The caller takes the responsibility to cancel | |
1057 | * the duplicate transaction that gets returned. | |
1058 | */ | |
70393313 | 1059 | error = __xfs_trans_commit(trans, true); |
322ff6b8 | 1060 | if (error) |
d99831ff | 1061 | return error; |
322ff6b8 | 1062 | |
322ff6b8 | 1063 | /* |
411350df | 1064 | * Reserve space in the log for the next transaction. |
322ff6b8 NS |
1065 | * This also pushes items in the "AIL", the list of logged items, |
1066 | * out to disk if they are taking up space at the tail of the log | |
1067 | * that we want to use. This requires that either nothing be locked | |
1068 | * across this call, or that anything that is locked be logged in | |
1069 | * the prior and the next transactions. | |
1070 | */ | |
3d3c8b52 | 1071 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
411350df | 1072 | return xfs_trans_reserve(*tpp, &tres, 0, 0); |
322ff6b8 | 1073 | } |