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 | ||
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) { | |
238 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 239 | -((int64_t)rtextents), rsvd); |
1da177e4 | 240 | if (error) { |
2451337d | 241 | error = -ENOSPC; |
1da177e4 LT |
242 | goto undo_log; |
243 | } | |
244 | tp->t_rtx_res += rtextents; | |
245 | } | |
246 | ||
247 | return 0; | |
248 | ||
249 | /* | |
250 | * Error cases jump to one of these labels to undo any | |
251 | * reservations which have already been performed. | |
252 | */ | |
253 | undo_log: | |
3d3c8b52 | 254 | if (resp->tr_logres > 0) { |
9006fb91 CH |
255 | int log_flags; |
256 | ||
3d3c8b52 | 257 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 LT |
258 | log_flags = XFS_LOG_REL_PERM_RESERV; |
259 | } else { | |
260 | log_flags = 0; | |
261 | } | |
262 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
263 | tp->t_ticket = NULL; | |
264 | tp->t_log_res = 0; | |
265 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
266 | } | |
267 | ||
268 | undo_blocks: | |
269 | if (blocks > 0) { | |
0d485ada | 270 | xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 LT |
271 | tp->t_blk_res = 0; |
272 | } | |
273 | ||
59c1b082 | 274 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 275 | |
59c1b082 | 276 | return error; |
1da177e4 LT |
277 | } |
278 | ||
1da177e4 LT |
279 | /* |
280 | * Record the indicated change to the given field for application | |
281 | * to the file system's superblock when the transaction commits. | |
282 | * For now, just store the change in the transaction structure. | |
283 | * | |
284 | * Mark the transaction structure to indicate that the superblock | |
285 | * needs to be updated before committing. | |
92821e2b DC |
286 | * |
287 | * Because we may not be keeping track of allocated/free inodes and | |
288 | * used filesystem blocks in the superblock, we do not mark the | |
289 | * superblock dirty in this transaction if we modify these fields. | |
290 | * We still need to update the transaction deltas so that they get | |
291 | * applied to the incore superblock, but we don't want them to | |
292 | * cause the superblock to get locked and logged if these are the | |
293 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
294 | */ |
295 | void | |
296 | xfs_trans_mod_sb( | |
297 | xfs_trans_t *tp, | |
298 | uint field, | |
20f4ebf2 | 299 | int64_t delta) |
1da177e4 | 300 | { |
92821e2b DC |
301 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
302 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
303 | |
304 | switch (field) { | |
305 | case XFS_TRANS_SB_ICOUNT: | |
306 | tp->t_icount_delta += delta; | |
92821e2b DC |
307 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
308 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
309 | break; |
310 | case XFS_TRANS_SB_IFREE: | |
311 | tp->t_ifree_delta += delta; | |
92821e2b DC |
312 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
313 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
314 | break; |
315 | case XFS_TRANS_SB_FDBLOCKS: | |
316 | /* | |
317 | * Track the number of blocks allocated in the | |
318 | * transaction. Make sure it does not exceed the | |
319 | * number reserved. | |
320 | */ | |
321 | if (delta < 0) { | |
322 | tp->t_blk_res_used += (uint)-delta; | |
323 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
324 | } | |
325 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
326 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
327 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
328 | break; |
329 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
330 | /* | |
331 | * The allocation has already been applied to the | |
332 | * in-core superblock's counter. This should only | |
333 | * be applied to the on-disk superblock. | |
334 | */ | |
335 | ASSERT(delta < 0); | |
336 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
337 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
338 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
339 | break; |
340 | case XFS_TRANS_SB_FREXTENTS: | |
341 | /* | |
342 | * Track the number of blocks allocated in the | |
343 | * transaction. Make sure it does not exceed the | |
344 | * number reserved. | |
345 | */ | |
346 | if (delta < 0) { | |
347 | tp->t_rtx_res_used += (uint)-delta; | |
348 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
349 | } | |
350 | tp->t_frextents_delta += delta; | |
351 | break; | |
352 | case XFS_TRANS_SB_RES_FREXTENTS: | |
353 | /* | |
354 | * The allocation has already been applied to the | |
c41564b5 | 355 | * in-core superblock's counter. This should only |
1da177e4 LT |
356 | * be applied to the on-disk superblock. |
357 | */ | |
358 | ASSERT(delta < 0); | |
359 | tp->t_res_frextents_delta += delta; | |
360 | break; | |
361 | case XFS_TRANS_SB_DBLOCKS: | |
362 | ASSERT(delta > 0); | |
363 | tp->t_dblocks_delta += delta; | |
364 | break; | |
365 | case XFS_TRANS_SB_AGCOUNT: | |
366 | ASSERT(delta > 0); | |
367 | tp->t_agcount_delta += delta; | |
368 | break; | |
369 | case XFS_TRANS_SB_IMAXPCT: | |
370 | tp->t_imaxpct_delta += delta; | |
371 | break; | |
372 | case XFS_TRANS_SB_REXTSIZE: | |
373 | tp->t_rextsize_delta += delta; | |
374 | break; | |
375 | case XFS_TRANS_SB_RBMBLOCKS: | |
376 | tp->t_rbmblocks_delta += delta; | |
377 | break; | |
378 | case XFS_TRANS_SB_RBLOCKS: | |
379 | tp->t_rblocks_delta += delta; | |
380 | break; | |
381 | case XFS_TRANS_SB_REXTENTS: | |
382 | tp->t_rextents_delta += delta; | |
383 | break; | |
384 | case XFS_TRANS_SB_REXTSLOG: | |
385 | tp->t_rextslog_delta += delta; | |
386 | break; | |
387 | default: | |
388 | ASSERT(0); | |
389 | return; | |
390 | } | |
391 | ||
210c6f1c | 392 | tp->t_flags |= flags; |
1da177e4 LT |
393 | } |
394 | ||
395 | /* | |
396 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
397 | * to bring the superblock buffer into the current transaction | |
398 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
399 | * | |
400 | * For now we just look at each field allowed to change and change | |
401 | * it if necessary. | |
402 | */ | |
403 | STATIC void | |
404 | xfs_trans_apply_sb_deltas( | |
405 | xfs_trans_t *tp) | |
406 | { | |
2bdf7cd0 | 407 | xfs_dsb_t *sbp; |
1da177e4 LT |
408 | xfs_buf_t *bp; |
409 | int whole = 0; | |
410 | ||
411 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
412 | sbp = XFS_BUF_TO_SBP(bp); | |
413 | ||
414 | /* | |
415 | * Check that superblock mods match the mods made to AGF counters. | |
416 | */ | |
417 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
418 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
419 | tp->t_ag_btree_delta)); | |
420 | ||
92821e2b DC |
421 | /* |
422 | * Only update the superblock counters if we are logging them | |
423 | */ | |
424 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 425 | if (tp->t_icount_delta) |
413d57c9 | 426 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 427 | if (tp->t_ifree_delta) |
413d57c9 | 428 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 429 | if (tp->t_fdblocks_delta) |
413d57c9 | 430 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 431 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 432 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
433 | } |
434 | ||
2bdf7cd0 | 435 | if (tp->t_frextents_delta) |
413d57c9 | 436 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 437 | if (tp->t_res_frextents_delta) |
413d57c9 | 438 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
439 | |
440 | if (tp->t_dblocks_delta) { | |
413d57c9 | 441 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
442 | whole = 1; |
443 | } | |
2bdf7cd0 | 444 | if (tp->t_agcount_delta) { |
413d57c9 | 445 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
446 | whole = 1; |
447 | } | |
2bdf7cd0 CH |
448 | if (tp->t_imaxpct_delta) { |
449 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
450 | whole = 1; |
451 | } | |
2bdf7cd0 | 452 | if (tp->t_rextsize_delta) { |
413d57c9 | 453 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
454 | whole = 1; |
455 | } | |
2bdf7cd0 | 456 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 457 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
458 | whole = 1; |
459 | } | |
2bdf7cd0 | 460 | if (tp->t_rblocks_delta) { |
413d57c9 | 461 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
462 | whole = 1; |
463 | } | |
2bdf7cd0 | 464 | if (tp->t_rextents_delta) { |
413d57c9 | 465 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
466 | whole = 1; |
467 | } | |
2bdf7cd0 CH |
468 | if (tp->t_rextslog_delta) { |
469 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
470 | whole = 1; |
471 | } | |
472 | ||
3443a3bc | 473 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
474 | if (whole) |
475 | /* | |
c41564b5 | 476 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 477 | */ |
2bdf7cd0 | 478 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
479 | else |
480 | /* | |
481 | * Since all the modifiable fields are contiguous, we | |
482 | * can get away with this. | |
483 | */ | |
2bdf7cd0 CH |
484 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
485 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 486 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
487 | } |
488 | ||
489 | /* | |
45c34141 DC |
490 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
491 | * and apply superblock counter changes to the in-core superblock. The | |
492 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
493 | * applied to the in-core superblock. The idea is that that has already been | |
494 | * done. | |
1da177e4 LT |
495 | * |
496 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
497 | * However, we have to ensure that we only modify each superblock field only |
498 | * once because the application of the delta values may not be atomic. That can | |
499 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
500 | * free space counter to put back the entire reservation and then take away | |
501 | * what we used. | |
502 | * | |
503 | * If we are not logging superblock counters, then the inode allocated/free and | |
504 | * used block counts are not updated in the on disk superblock. In this case, | |
505 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
506 | * still need to update the incore superblock with the changes. | |
1da177e4 | 507 | */ |
71e330b5 | 508 | void |
1da177e4 LT |
509 | xfs_trans_unreserve_and_mod_sb( |
510 | xfs_trans_t *tp) | |
511 | { | |
1b040712 | 512 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 513 | xfs_mod_sb_t *msbp; |
92821e2b | 514 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
515 | /* REFERENCED */ |
516 | int error; | |
0d485ada | 517 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
45c34141 DC |
518 | int64_t blkdelta = 0; |
519 | int64_t rtxdelta = 0; | |
1b040712 CH |
520 | int64_t idelta = 0; |
521 | int64_t ifreedelta = 0; | |
1da177e4 LT |
522 | |
523 | msbp = msb; | |
1da177e4 | 524 | |
1b040712 | 525 | /* calculate deltas */ |
45c34141 DC |
526 | if (tp->t_blk_res > 0) |
527 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
528 | if ((tp->t_fdblocks_delta != 0) && |
529 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
530 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
531 | blkdelta += tp->t_fdblocks_delta; | |
532 | ||
45c34141 DC |
533 | if (tp->t_rtx_res > 0) |
534 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
535 | if ((tp->t_frextents_delta != 0) && |
536 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
537 | rtxdelta += tp->t_frextents_delta; | |
538 | ||
1b040712 CH |
539 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
540 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
541 | idelta = tp->t_icount_delta; | |
542 | ifreedelta = tp->t_ifree_delta; | |
543 | } | |
544 | ||
545 | /* apply the per-cpu counters */ | |
546 | if (blkdelta) { | |
0d485ada | 547 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
548 | if (error) |
549 | goto out; | |
550 | } | |
551 | ||
552 | if (idelta) { | |
501ab323 | 553 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
554 | if (error) |
555 | goto out_undo_fdblocks; | |
556 | } | |
557 | ||
558 | if (ifreedelta) { | |
e88b64ea | 559 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
560 | if (error) |
561 | goto out_undo_icount; | |
562 | } | |
563 | ||
564 | /* apply remaining deltas */ | |
45c34141 | 565 | if (rtxdelta != 0) { |
1da177e4 | 566 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 567 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
568 | msbp++; |
569 | } | |
570 | ||
92821e2b | 571 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
572 | if (tp->t_dblocks_delta != 0) { |
573 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 574 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
575 | msbp++; |
576 | } | |
577 | if (tp->t_agcount_delta != 0) { | |
578 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 579 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
580 | msbp++; |
581 | } | |
582 | if (tp->t_imaxpct_delta != 0) { | |
583 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 584 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
585 | msbp++; |
586 | } | |
587 | if (tp->t_rextsize_delta != 0) { | |
588 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 589 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
590 | msbp++; |
591 | } | |
592 | if (tp->t_rbmblocks_delta != 0) { | |
593 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 594 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
595 | msbp++; |
596 | } | |
597 | if (tp->t_rblocks_delta != 0) { | |
598 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 599 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
600 | msbp++; |
601 | } | |
602 | if (tp->t_rextents_delta != 0) { | |
603 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 604 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
605 | msbp++; |
606 | } | |
607 | if (tp->t_rextslog_delta != 0) { | |
608 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 609 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
610 | msbp++; |
611 | } | |
612 | } | |
613 | ||
614 | /* | |
615 | * If we need to change anything, do it. | |
616 | */ | |
617 | if (msbp > msb) { | |
618 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
619 | (uint)(msbp - msb), rsvd); | |
1b040712 CH |
620 | if (error) |
621 | goto out_undo_ifreecount; | |
1da177e4 | 622 | } |
1b040712 CH |
623 | |
624 | return; | |
625 | ||
626 | out_undo_ifreecount: | |
627 | if (ifreedelta) | |
e88b64ea | 628 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
629 | out_undo_icount: |
630 | if (idelta) | |
501ab323 | 631 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
632 | out_undo_fdblocks: |
633 | if (blkdelta) | |
0d485ada | 634 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 635 | out: |
1884bd83 | 636 | ASSERT(error == 0); |
1b040712 | 637 | return; |
1da177e4 LT |
638 | } |
639 | ||
e98c414f CH |
640 | /* |
641 | * Add the given log item to the transaction's list of log items. | |
642 | * | |
643 | * The log item will now point to its new descriptor with its li_desc field. | |
644 | */ | |
645 | void | |
646 | xfs_trans_add_item( | |
647 | struct xfs_trans *tp, | |
648 | struct xfs_log_item *lip) | |
649 | { | |
650 | struct xfs_log_item_desc *lidp; | |
651 | ||
f65020a8 JJ |
652 | ASSERT(lip->li_mountp == tp->t_mountp); |
653 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 654 | |
43869706 | 655 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
656 | |
657 | lidp->lid_item = lip; | |
658 | lidp->lid_flags = 0; | |
e98c414f CH |
659 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
660 | ||
661 | lip->li_desc = lidp; | |
662 | } | |
663 | ||
664 | STATIC void | |
665 | xfs_trans_free_item_desc( | |
666 | struct xfs_log_item_desc *lidp) | |
667 | { | |
668 | list_del_init(&lidp->lid_trans); | |
669 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
670 | } | |
671 | ||
672 | /* | |
673 | * Unlink and free the given descriptor. | |
674 | */ | |
675 | void | |
676 | xfs_trans_del_item( | |
677 | struct xfs_log_item *lip) | |
678 | { | |
679 | xfs_trans_free_item_desc(lip->li_desc); | |
680 | lip->li_desc = NULL; | |
681 | } | |
682 | ||
683 | /* | |
684 | * Unlock all of the items of a transaction and free all the descriptors | |
685 | * of that transaction. | |
686 | */ | |
d17c701c | 687 | void |
e98c414f CH |
688 | xfs_trans_free_items( |
689 | struct xfs_trans *tp, | |
690 | xfs_lsn_t commit_lsn, | |
691 | int flags) | |
692 | { | |
693 | struct xfs_log_item_desc *lidp, *next; | |
694 | ||
695 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
696 | struct xfs_log_item *lip = lidp->lid_item; | |
697 | ||
698 | lip->li_desc = NULL; | |
699 | ||
700 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 701 | lip->li_ops->iop_committing(lip, commit_lsn); |
e98c414f CH |
702 | if (flags & XFS_TRANS_ABORT) |
703 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 704 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
705 | |
706 | xfs_trans_free_item_desc(lidp); | |
707 | } | |
708 | } | |
709 | ||
0e57f6a3 DC |
710 | static inline void |
711 | xfs_log_item_batch_insert( | |
712 | struct xfs_ail *ailp, | |
1d8c95a3 | 713 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
714 | struct xfs_log_item **log_items, |
715 | int nr_items, | |
716 | xfs_lsn_t commit_lsn) | |
717 | { | |
718 | int i; | |
719 | ||
720 | spin_lock(&ailp->xa_lock); | |
721 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 722 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 723 | |
904c17e6 DC |
724 | for (i = 0; i < nr_items; i++) { |
725 | struct xfs_log_item *lip = log_items[i]; | |
726 | ||
727 | lip->li_ops->iop_unpin(lip, 0); | |
728 | } | |
0e57f6a3 DC |
729 | } |
730 | ||
731 | /* | |
732 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
733 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
734 | * minimise lock traffic. | |
e34a314c DC |
735 | * |
736 | * If we are called with the aborted flag set, it is because a log write during | |
737 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 738 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
739 | * means that checkpoint commit abort handling is treated exactly the same |
740 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
741 | * this case all we need to do is iop_committed processing, followed by an |
742 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
743 | * |
744 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
745 | * at the end of the AIL, the insert cursor avoids the need to walk | |
746 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
747 | * call. This saves a lot of needless list walking and is a net win, even | |
748 | * though it slightly increases that amount of AIL lock traffic to set it up | |
749 | * and tear it down. | |
0e57f6a3 DC |
750 | */ |
751 | void | |
752 | xfs_trans_committed_bulk( | |
753 | struct xfs_ail *ailp, | |
754 | struct xfs_log_vec *log_vector, | |
755 | xfs_lsn_t commit_lsn, | |
756 | int aborted) | |
757 | { | |
758 | #define LOG_ITEM_BATCH_SIZE 32 | |
759 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
760 | struct xfs_log_vec *lv; | |
1d8c95a3 | 761 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
762 | int i = 0; |
763 | ||
1d8c95a3 DC |
764 | spin_lock(&ailp->xa_lock); |
765 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
766 | spin_unlock(&ailp->xa_lock); | |
767 | ||
0e57f6a3 DC |
768 | /* unpin all the log items */ |
769 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
770 | struct xfs_log_item *lip = lv->lv_item; | |
771 | xfs_lsn_t item_lsn; | |
772 | ||
773 | if (aborted) | |
774 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 775 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 776 | |
1316d4da | 777 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
778 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
779 | continue; | |
780 | ||
e34a314c DC |
781 | /* |
782 | * if we are aborting the operation, no point in inserting the | |
783 | * object into the AIL as we are in a shutdown situation. | |
784 | */ | |
785 | if (aborted) { | |
786 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 787 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
788 | continue; |
789 | } | |
790 | ||
0e57f6a3 DC |
791 | if (item_lsn != commit_lsn) { |
792 | ||
793 | /* | |
794 | * Not a bulk update option due to unusual item_lsn. | |
795 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
796 | * we have the ail lock. Then unpin the item. This does |
797 | * not affect the AIL cursor the bulk insert path is | |
798 | * using. | |
0e57f6a3 DC |
799 | */ |
800 | spin_lock(&ailp->xa_lock); | |
801 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
802 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
803 | else | |
804 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 805 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
806 | continue; |
807 | } | |
808 | ||
809 | /* Item is a candidate for bulk AIL insert. */ | |
810 | log_items[i++] = lv->lv_item; | |
811 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 812 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
813 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
814 | i = 0; | |
815 | } | |
816 | } | |
817 | ||
818 | /* make sure we insert the remainder! */ | |
819 | if (i) | |
1d8c95a3 DC |
820 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
821 | ||
822 | spin_lock(&ailp->xa_lock); | |
e4a1e29c | 823 | xfs_trans_ail_cursor_done(&cur); |
1d8c95a3 | 824 | spin_unlock(&ailp->xa_lock); |
0e57f6a3 DC |
825 | } |
826 | ||
0924378a | 827 | /* |
b1037058 | 828 | * Commit the given transaction to the log. |
0924378a DC |
829 | * |
830 | * XFS disk error handling mechanism is not based on a typical | |
831 | * transaction abort mechanism. Logically after the filesystem | |
832 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
833 | * be durable - ie. committed to disk - because some metadata might | |
834 | * be inconsistent. In such cases, this returns an error, and the | |
835 | * caller may assume that all locked objects joined to the transaction | |
836 | * have already been unlocked as if the commit had succeeded. | |
837 | * Do not reference the transaction structure after this call. | |
838 | */ | |
0924378a | 839 | int |
b1037058 | 840 | xfs_trans_commit( |
a3ccd2ca | 841 | struct xfs_trans *tp, |
b1037058 | 842 | uint flags) |
0924378a | 843 | { |
a3ccd2ca | 844 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 845 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 846 | int error = 0; |
0924378a DC |
847 | int log_flags = 0; |
848 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
849 | |
850 | /* | |
851 | * Determine whether this commit is releasing a permanent | |
852 | * log reservation or not. | |
853 | */ | |
854 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
855 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
856 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
857 | } | |
858 | ||
859 | /* | |
860 | * If there is nothing to be logged by the transaction, | |
861 | * then unlock all of the items associated with the | |
862 | * transaction and free the transaction structure. | |
863 | * Also make sure to return any reserved blocks to | |
864 | * the free pool. | |
865 | */ | |
a3ccd2ca CH |
866 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
867 | goto out_unreserve; | |
868 | ||
869 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 870 | error = -EIO; |
a3ccd2ca | 871 | goto out_unreserve; |
0924378a | 872 | } |
a3ccd2ca | 873 | |
0924378a DC |
874 | ASSERT(tp->t_ticket != NULL); |
875 | ||
876 | /* | |
877 | * If we need to update the superblock, then do it now. | |
878 | */ | |
879 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
880 | xfs_trans_apply_sb_deltas(tp); | |
881 | xfs_trans_apply_dquot_deltas(tp); | |
882 | ||
c6f97264 | 883 | xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
1da177e4 | 884 | |
0244b960 CH |
885 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
886 | xfs_trans_free(tp); | |
887 | ||
1da177e4 LT |
888 | /* |
889 | * If the transaction needs to be synchronous, then force the | |
890 | * log out now and wait for it. | |
891 | */ | |
892 | if (sync) { | |
c6f97264 | 893 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
1da177e4 LT |
894 | XFS_STATS_INC(xs_trans_sync); |
895 | } else { | |
896 | XFS_STATS_INC(xs_trans_async); | |
897 | } | |
898 | ||
a3ccd2ca CH |
899 | return error; |
900 | ||
901 | out_unreserve: | |
902 | xfs_trans_unreserve_and_mod_sb(tp); | |
903 | ||
904 | /* | |
905 | * It is indeed possible for the transaction to be not dirty but | |
906 | * the dqinfo portion to be. All that means is that we have some | |
907 | * (non-persistent) quota reservations that need to be unreserved. | |
908 | */ | |
909 | xfs_trans_unreserve_and_mod_dquots(tp); | |
910 | if (tp->t_ticket) { | |
911 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
912 | if (commit_lsn == -1 && !error) | |
2451337d | 913 | error = -EIO; |
a3ccd2ca CH |
914 | } |
915 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 916 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
917 | xfs_trans_free(tp); |
918 | ||
919 | XFS_STATS_INC(xs_trans_empty); | |
920 | return error; | |
1da177e4 LT |
921 | } |
922 | ||
1da177e4 LT |
923 | /* |
924 | * Unlock all of the transaction's items and free the transaction. | |
925 | * The transaction must not have modified any of its items, because | |
926 | * there is no way to restore them to their previous state. | |
927 | * | |
928 | * If the transaction has made a log reservation, make sure to release | |
929 | * it as well. | |
930 | */ | |
931 | void | |
932 | xfs_trans_cancel( | |
933 | xfs_trans_t *tp, | |
934 | int flags) | |
935 | { | |
936 | int log_flags; | |
0733af21 | 937 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
938 | |
939 | /* | |
940 | * See if the caller is being too lazy to figure out if | |
941 | * the transaction really needs an abort. | |
942 | */ | |
943 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
944 | flags &= ~XFS_TRANS_ABORT; | |
945 | /* | |
946 | * See if the caller is relying on us to shut down the | |
947 | * filesystem. This happens in paths where we detect | |
948 | * corruption and decide to give up. | |
949 | */ | |
60a204f0 | 950 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 951 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 952 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 953 | } |
1da177e4 | 954 | #ifdef DEBUG |
e98c414f CH |
955 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
956 | struct xfs_log_item_desc *lidp; | |
957 | ||
958 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
959 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
960 | } |
961 | #endif | |
962 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 963 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
964 | |
965 | if (tp->t_ticket) { | |
966 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
967 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
968 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
969 | } else { | |
970 | log_flags = 0; | |
971 | } | |
0733af21 | 972 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
973 | } |
974 | ||
975 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 976 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 977 | |
71e330b5 | 978 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
979 | xfs_trans_free(tp); |
980 | } | |
981 | ||
322ff6b8 NS |
982 | /* |
983 | * Roll from one trans in the sequence of PERMANENT transactions to | |
984 | * the next: permanent transactions are only flushed out when | |
985 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
986 | * as possible to let chunks of it go to the log. So we commit the | |
987 | * chunk we've been working on and get a new transaction to continue. | |
988 | */ | |
989 | int | |
990 | xfs_trans_roll( | |
991 | struct xfs_trans **tpp, | |
992 | struct xfs_inode *dp) | |
993 | { | |
994 | struct xfs_trans *trans; | |
3d3c8b52 | 995 | struct xfs_trans_res tres; |
322ff6b8 NS |
996 | int error; |
997 | ||
998 | /* | |
999 | * Ensure that the inode is always logged. | |
1000 | */ | |
1001 | trans = *tpp; | |
1002 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1003 | ||
1004 | /* | |
1005 | * Copy the critical parameters from one trans to the next. | |
1006 | */ | |
3d3c8b52 JL |
1007 | tres.tr_logres = trans->t_log_res; |
1008 | tres.tr_logcount = trans->t_log_count; | |
322ff6b8 NS |
1009 | *tpp = xfs_trans_dup(trans); |
1010 | ||
1011 | /* | |
1012 | * Commit the current transaction. | |
1013 | * If this commit failed, then it'd just unlock those items that | |
1014 | * are not marked ihold. That also means that a filesystem shutdown | |
1015 | * is in progress. The caller takes the responsibility to cancel | |
1016 | * the duplicate transaction that gets returned. | |
1017 | */ | |
1018 | error = xfs_trans_commit(trans, 0); | |
1019 | if (error) | |
d99831ff | 1020 | return error; |
322ff6b8 NS |
1021 | |
1022 | trans = *tpp; | |
1023 | ||
cc09c0dc DC |
1024 | /* |
1025 | * transaction commit worked ok so we can drop the extra ticket | |
1026 | * reference that we gained in xfs_trans_dup() | |
1027 | */ | |
1028 | xfs_log_ticket_put(trans->t_ticket); | |
1029 | ||
1030 | ||
322ff6b8 NS |
1031 | /* |
1032 | * Reserve space in the log for th next transaction. | |
1033 | * This also pushes items in the "AIL", the list of logged items, | |
1034 | * out to disk if they are taking up space at the tail of the log | |
1035 | * that we want to use. This requires that either nothing be locked | |
1036 | * across this call, or that anything that is locked be logged in | |
1037 | * the prior and the next transactions. | |
1038 | */ | |
3d3c8b52 JL |
1039 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
1040 | error = xfs_trans_reserve(trans, &tres, 0, 0); | |
322ff6b8 NS |
1041 | /* |
1042 | * Ensure that the inode is in the new transaction and locked. | |
1043 | */ | |
1044 | if (error) | |
1045 | return error; | |
1046 | ||
ddc3415a | 1047 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1048 | return 0; |
1049 | } |