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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
Christoph Hellwige98c4142010-06-23 18:11:15 +10003 * Copyright (C) 2010 Red Hat, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11004 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
Nathan Scott7b718762005-11-02 14:58:39 +11006 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * published by the Free Software Foundation.
9 *
Nathan Scott7b718762005-11-02 14:58:39 +110010 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 *
Nathan Scott7b718762005-11-02 14:58:39 +110015 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_fs.h"
Dave Chinner70a9883c2013-10-23 10:36:05 +110021#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110022#include "xfs_format.h"
23#include "xfs_log_format.h"
24#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_mount.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_inode.h"
Dave Chinnerefc27b52012-04-29 10:39:43 +000027#include "xfs_extent_busy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_quota.h"
Dave Chinner239880e2013-10-23 10:50:10 +110029#include "xfs_trans.h"
Nathan Scotta844f452005-11-02 14:38:42 +110030#include "xfs_trans_priv.h"
Dave Chinner239880e2013-10-23 10:50:10 +110031#include "xfs_log.h"
Dave Chinnered3b4d62010-05-21 12:07:08 +100032#include "xfs_trace.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110033#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Nathan Scott8f794052006-03-14 13:32:41 +110035kmem_zone_t *xfs_trans_zone;
Christoph Hellwige98c4142010-06-23 18:11:15 +100036kmem_zone_t *xfs_log_item_desc_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Jeff Liu4f3b5782013-01-28 21:25:35 +080038/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 * Initialize the precomputed transaction reservation values
40 * in the mount structure.
41 */
42void
43xfs_trans_init(
Christoph Hellwig025101d2010-05-04 13:53:48 +000044 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
Jie Liu3d3c8b52013-08-12 20:49:59 +100046 xfs_trans_resv_calc(mp, M_RES(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -070047}
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.
Alex Elderb2ce3972011-07-11 09:51:44 -050053 *
54 * Dynamically allocate the transaction structure from the transaction
55 * zone, initialize it, and return it to the caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 */
Alex Elderb2ce3972011-07-11 09:51:44 -050057xfs_trans_t *
58xfs_trans_alloc(
59 xfs_mount_t *mp,
60 uint type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
Jan Karad9457dc2012-06-12 16:20:39 +020062 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;
Alex Elderb2ce3972011-07-11 09:51:44 -050068}
69
70xfs_trans_t *
71_xfs_trans_alloc(
72 xfs_mount_t *mp,
73 uint type,
Al Viro77ba7872012-04-02 06:24:04 -040074 xfs_km_flags_t memflags)
Alex Elderb2ce3972011-07-11 09:51:44 -050075{
76 xfs_trans_t *tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Jan Karad9457dc2012-06-12 16:20:39 +020078 WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE);
Nathan Scott34327e12006-06-09 17:11:55 +100079 atomic_inc(&mp->m_active_trans);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Christoph Hellwig80641dc2009-10-19 04:00:03 +000081 tp = kmem_zone_zalloc(xfs_trans_zone, memflags);
Dave Chinner2a3c0ac2013-08-12 20:49:28 +100082 tp->t_magic = XFS_TRANS_HEADER_MAGIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 tp->t_type = type;
84 tp->t_mountp = mp;
Christoph Hellwige98c4142010-06-23 18:11:15 +100085 INIT_LIST_HEAD(&tp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +100086 INIT_LIST_HEAD(&tp->t_busy);
Nathan Scott34327e12006-06-09 17:11:55 +100087 return tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088}
89
90/*
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110091 * Free the transaction structure. If there is more clean up
92 * to do when the structure is freed, add it here.
93 */
94STATIC void
95xfs_trans_free(
Dave Chinnered3b4d62010-05-21 12:07:08 +100096 struct xfs_trans *tp)
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110097{
Dave Chinner4ecbfe62012-04-29 10:41:10 +000098 xfs_extent_busy_sort(&tp->t_busy);
99 xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000100
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100101 atomic_dec(&tp->t_mountp->m_active_trans);
Jan Karad9457dc2012-06-12 16:20:39 +0200102 if (tp->t_flags & XFS_TRANS_FREEZE_PROT)
103 sb_end_intwrite(tp->t_mountp->m_super);
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100104 xfs_trans_free_dqinfo(tp);
105 kmem_zone_free(xfs_trans_zone, tp);
106}
107
108/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 * 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 */
116xfs_trans_t *
117xfs_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 */
Dave Chinner2a3c0ac2013-08-12 20:49:28 +1000127 ntp->t_magic = XFS_TRANS_HEADER_MAGIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 ntp->t_type = tp->t_type;
129 ntp->t_mountp = tp->t_mountp;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000130 INIT_LIST_HEAD(&ntp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000131 INIT_LIST_HEAD(&ntp->t_busy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 ASSERT(tp->t_ticket != NULL);
Nathan Scottcfcbbbd2005-11-02 15:12:04 +1100135
Jan Karad9457dc2012-06-12 16:20:39 +0200136 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;
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100141 ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 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;
Nathan Scott59c1b082006-06-09 14:59:13 +1000146 ntp->t_pflags = tp->t_pflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Christoph Hellwig7d095252009-06-08 15:33:32 +0200148 xfs_trans_dup_dqinfo(tp, ntp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
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 */
168int
169xfs_trans_reserve(
Jie Liu3d3c8b52013-08-12 20:49:59 +1000170 struct xfs_trans *tp,
171 struct xfs_trans_res *resp,
172 uint blocks,
173 uint rtextents)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174{
Nathan Scott59c1b082006-06-09 14:59:13 +1000175 int error = 0;
176 int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178 /* Mark this thread as being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +1000179 current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
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) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000187 error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100188 -((int64_t)blocks), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 if (error != 0) {
Nathan Scott59c1b082006-06-09 14:59:13 +1000190 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Dave Chinner24513372014-06-25 14:58:08 +1000191 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
193 tp->t_blk_res += blocks;
194 }
195
196 /*
197 * Reserve the log space needed for this transaction.
198 */
Jie Liu3d3c8b52013-08-12 20:49:59 +1000199 if (resp->tr_logres > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000200 bool permanent = false;
201
Jie Liu3d3c8b52013-08-12 20:49:59 +1000202 ASSERT(tp->t_log_res == 0 ||
203 tp->t_log_res == resp->tr_logres);
204 ASSERT(tp->t_log_count == 0 ||
205 tp->t_log_count == resp->tr_logcount);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000206
Jie Liu3d3c8b52013-08-12 20:49:59 +1000207 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000209 permanent = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 } else {
211 ASSERT(tp->t_ticket == NULL);
212 ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 }
214
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000215 if (tp->t_ticket != NULL) {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000216 ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000217 error = xfs_log_regrant(tp->t_mountp, tp->t_ticket);
218 } else {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000219 error = xfs_log_reserve(tp->t_mountp,
220 resp->tr_logres,
221 resp->tr_logcount,
222 &tp->t_ticket, XFS_TRANSACTION,
223 permanent, tp->t_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000225
226 if (error)
227 goto undo_blocks;
228
Jie Liu3d3c8b52013-08-12 20:49:59 +1000229 tp->t_log_res = resp->tr_logres;
230 tp->t_log_count = resp->tr_logcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
232
233 /*
234 * Attempt to reserve the needed realtime extents by decrementing
235 * the number needed from the number available. This will
236 * fail if the count would go below zero.
237 */
238 if (rtextents > 0) {
239 error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100240 -((int64_t)rtextents), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +1000242 error = -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 goto undo_log;
244 }
245 tp->t_rtx_res += rtextents;
246 }
247
248 return 0;
249
250 /*
251 * Error cases jump to one of these labels to undo any
252 * reservations which have already been performed.
253 */
254undo_log:
Jie Liu3d3c8b52013-08-12 20:49:59 +1000255 if (resp->tr_logres > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000256 int log_flags;
257
Jie Liu3d3c8b52013-08-12 20:49:59 +1000258 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 log_flags = XFS_LOG_REL_PERM_RESERV;
260 } else {
261 log_flags = 0;
262 }
263 xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags);
264 tp->t_ticket = NULL;
265 tp->t_log_res = 0;
266 tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
267 }
268
269undo_blocks:
270 if (blocks > 0) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000271 xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100272 (int64_t)blocks, rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 tp->t_blk_res = 0;
274 }
275
Nathan Scott59c1b082006-06-09 14:59:13 +1000276 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Nathan Scott59c1b082006-06-09 14:59:13 +1000278 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 * Record the indicated change to the given field for application
283 * to the file system's superblock when the transaction commits.
284 * For now, just store the change in the transaction structure.
285 *
286 * Mark the transaction structure to indicate that the superblock
287 * needs to be updated before committing.
David Chinner92821e22007-05-24 15:26:31 +1000288 *
289 * Because we may not be keeping track of allocated/free inodes and
290 * used filesystem blocks in the superblock, we do not mark the
291 * superblock dirty in this transaction if we modify these fields.
292 * We still need to update the transaction deltas so that they get
293 * applied to the incore superblock, but we don't want them to
294 * cause the superblock to get locked and logged if these are the
295 * only fields in the superblock that the transaction modifies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 */
297void
298xfs_trans_mod_sb(
299 xfs_trans_t *tp,
300 uint field,
David Chinner20f4ebf2007-02-10 18:36:10 +1100301 int64_t delta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302{
David Chinner92821e22007-05-24 15:26:31 +1000303 uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
304 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306 switch (field) {
307 case XFS_TRANS_SB_ICOUNT:
308 tp->t_icount_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000309 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
310 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 break;
312 case XFS_TRANS_SB_IFREE:
313 tp->t_ifree_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000314 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
315 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 break;
317 case XFS_TRANS_SB_FDBLOCKS:
318 /*
319 * Track the number of blocks allocated in the
320 * transaction. Make sure it does not exceed the
321 * number reserved.
322 */
323 if (delta < 0) {
324 tp->t_blk_res_used += (uint)-delta;
325 ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
326 }
327 tp->t_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000328 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
329 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 break;
331 case XFS_TRANS_SB_RES_FDBLOCKS:
332 /*
333 * The allocation has already been applied to the
334 * in-core superblock's counter. This should only
335 * be applied to the on-disk superblock.
336 */
337 ASSERT(delta < 0);
338 tp->t_res_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000339 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
340 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 break;
342 case XFS_TRANS_SB_FREXTENTS:
343 /*
344 * Track the number of blocks allocated in the
345 * transaction. Make sure it does not exceed the
346 * number reserved.
347 */
348 if (delta < 0) {
349 tp->t_rtx_res_used += (uint)-delta;
350 ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
351 }
352 tp->t_frextents_delta += delta;
353 break;
354 case XFS_TRANS_SB_RES_FREXTENTS:
355 /*
356 * The allocation has already been applied to the
Nathan Scottc41564b2006-03-29 08:55:14 +1000357 * in-core superblock's counter. This should only
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 * be applied to the on-disk superblock.
359 */
360 ASSERT(delta < 0);
361 tp->t_res_frextents_delta += delta;
362 break;
363 case XFS_TRANS_SB_DBLOCKS:
364 ASSERT(delta > 0);
365 tp->t_dblocks_delta += delta;
366 break;
367 case XFS_TRANS_SB_AGCOUNT:
368 ASSERT(delta > 0);
369 tp->t_agcount_delta += delta;
370 break;
371 case XFS_TRANS_SB_IMAXPCT:
372 tp->t_imaxpct_delta += delta;
373 break;
374 case XFS_TRANS_SB_REXTSIZE:
375 tp->t_rextsize_delta += delta;
376 break;
377 case XFS_TRANS_SB_RBMBLOCKS:
378 tp->t_rbmblocks_delta += delta;
379 break;
380 case XFS_TRANS_SB_RBLOCKS:
381 tp->t_rblocks_delta += delta;
382 break;
383 case XFS_TRANS_SB_REXTENTS:
384 tp->t_rextents_delta += delta;
385 break;
386 case XFS_TRANS_SB_REXTSLOG:
387 tp->t_rextslog_delta += delta;
388 break;
389 default:
390 ASSERT(0);
391 return;
392 }
393
David Chinner210c6f12007-05-24 15:26:51 +1000394 tp->t_flags |= flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395}
396
397/*
398 * xfs_trans_apply_sb_deltas() is called from the commit code
399 * to bring the superblock buffer into the current transaction
400 * and modify it as requested by earlier calls to xfs_trans_mod_sb().
401 *
402 * For now we just look at each field allowed to change and change
403 * it if necessary.
404 */
405STATIC void
406xfs_trans_apply_sb_deltas(
407 xfs_trans_t *tp)
408{
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000409 xfs_dsb_t *sbp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 xfs_buf_t *bp;
411 int whole = 0;
412
413 bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
414 sbp = XFS_BUF_TO_SBP(bp);
415
416 /*
417 * Check that superblock mods match the mods made to AGF counters.
418 */
419 ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
420 (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
421 tp->t_ag_btree_delta));
422
David Chinner92821e22007-05-24 15:26:31 +1000423 /*
424 * Only update the superblock counters if we are logging them
425 */
426 if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000427 if (tp->t_icount_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800428 be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000429 if (tp->t_ifree_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800430 be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000431 if (tp->t_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800432 be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000433 if (tp->t_res_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800434 be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 }
436
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000437 if (tp->t_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800438 be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000439 if (tp->t_res_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800440 be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000441
442 if (tp->t_dblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800443 be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 whole = 1;
445 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000446 if (tp->t_agcount_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800447 be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 whole = 1;
449 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000450 if (tp->t_imaxpct_delta) {
451 sbp->sb_imax_pct += tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 whole = 1;
453 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000454 if (tp->t_rextsize_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800455 be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 whole = 1;
457 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000458 if (tp->t_rbmblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800459 be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 whole = 1;
461 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000462 if (tp->t_rblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800463 be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 whole = 1;
465 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000466 if (tp->t_rextents_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800467 be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 whole = 1;
469 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000470 if (tp->t_rextslog_delta) {
471 sbp->sb_rextslog += tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 whole = 1;
473 }
474
475 if (whole)
476 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000477 * Log the whole thing, the fields are noncontiguous.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000479 xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 else
481 /*
482 * Since all the modifiable fields are contiguous, we
483 * can get away with this.
484 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000485 xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
486 offsetof(xfs_dsb_t, sb_frextents) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 sizeof(sbp->sb_frextents) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488}
489
490/*
David Chinner45c34142007-06-18 16:49:44 +1000491 * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
492 * and apply superblock counter changes to the in-core superblock. The
493 * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
494 * applied to the in-core superblock. The idea is that that has already been
495 * done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 *
497 * This is done efficiently with a single call to xfs_mod_incore_sb_batch().
David Chinner45c34142007-06-18 16:49:44 +1000498 * However, we have to ensure that we only modify each superblock field only
499 * once because the application of the delta values may not be atomic. That can
500 * lead to ENOSPC races occurring if we have two separate modifcations of the
501 * free space counter to put back the entire reservation and then take away
502 * what we used.
503 *
504 * If we are not logging superblock counters, then the inode allocated/free and
505 * used block counts are not updated in the on disk superblock. In this case,
506 * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
507 * still need to update the incore superblock with the changes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 */
Dave Chinner71e330b2010-05-21 14:37:18 +1000509void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510xfs_trans_unreserve_and_mod_sb(
511 xfs_trans_t *tp)
512{
Christoph Hellwig1b040712010-09-30 02:25:56 +0000513 xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 xfs_mod_sb_t *msbp;
David Chinner92821e22007-05-24 15:26:31 +1000515 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 /* REFERENCED */
517 int error;
518 int rsvd;
David Chinner45c34142007-06-18 16:49:44 +1000519 int64_t blkdelta = 0;
520 int64_t rtxdelta = 0;
Christoph Hellwig1b040712010-09-30 02:25:56 +0000521 int64_t idelta = 0;
522 int64_t ifreedelta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
524 msbp = msb;
525 rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
526
Christoph Hellwig1b040712010-09-30 02:25:56 +0000527 /* calculate deltas */
David Chinner45c34142007-06-18 16:49:44 +1000528 if (tp->t_blk_res > 0)
529 blkdelta = tp->t_blk_res;
David Chinner45c34142007-06-18 16:49:44 +1000530 if ((tp->t_fdblocks_delta != 0) &&
531 (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
532 (tp->t_flags & XFS_TRANS_SB_DIRTY)))
533 blkdelta += tp->t_fdblocks_delta;
534
David Chinner45c34142007-06-18 16:49:44 +1000535 if (tp->t_rtx_res > 0)
536 rtxdelta = tp->t_rtx_res;
David Chinner45c34142007-06-18 16:49:44 +1000537 if ((tp->t_frextents_delta != 0) &&
538 (tp->t_flags & XFS_TRANS_SB_DIRTY))
539 rtxdelta += tp->t_frextents_delta;
540
Christoph Hellwig1b040712010-09-30 02:25:56 +0000541 if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
542 (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
543 idelta = tp->t_icount_delta;
544 ifreedelta = tp->t_ifree_delta;
545 }
546
547 /* apply the per-cpu counters */
548 if (blkdelta) {
549 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
550 blkdelta, rsvd);
551 if (error)
552 goto out;
553 }
554
555 if (idelta) {
556 error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT,
557 idelta, rsvd);
558 if (error)
559 goto out_undo_fdblocks;
560 }
561
562 if (ifreedelta) {
563 error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE,
564 ifreedelta, rsvd);
565 if (error)
566 goto out_undo_icount;
567 }
568
569 /* apply remaining deltas */
David Chinner45c34142007-06-18 16:49:44 +1000570 if (rtxdelta != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 msbp->msb_field = XFS_SBS_FREXTENTS;
David Chinner45c34142007-06-18 16:49:44 +1000572 msbp->msb_delta = rtxdelta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 msbp++;
574 }
575
David Chinner92821e22007-05-24 15:26:31 +1000576 if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 if (tp->t_dblocks_delta != 0) {
578 msbp->msb_field = XFS_SBS_DBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100579 msbp->msb_delta = tp->t_dblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 msbp++;
581 }
582 if (tp->t_agcount_delta != 0) {
583 msbp->msb_field = XFS_SBS_AGCOUNT;
David Chinner20f4ebf2007-02-10 18:36:10 +1100584 msbp->msb_delta = tp->t_agcount_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 msbp++;
586 }
587 if (tp->t_imaxpct_delta != 0) {
588 msbp->msb_field = XFS_SBS_IMAX_PCT;
David Chinner20f4ebf2007-02-10 18:36:10 +1100589 msbp->msb_delta = tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 msbp++;
591 }
592 if (tp->t_rextsize_delta != 0) {
593 msbp->msb_field = XFS_SBS_REXTSIZE;
David Chinner20f4ebf2007-02-10 18:36:10 +1100594 msbp->msb_delta = tp->t_rextsize_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 msbp++;
596 }
597 if (tp->t_rbmblocks_delta != 0) {
598 msbp->msb_field = XFS_SBS_RBMBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100599 msbp->msb_delta = tp->t_rbmblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 msbp++;
601 }
602 if (tp->t_rblocks_delta != 0) {
603 msbp->msb_field = XFS_SBS_RBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100604 msbp->msb_delta = tp->t_rblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 msbp++;
606 }
607 if (tp->t_rextents_delta != 0) {
608 msbp->msb_field = XFS_SBS_REXTENTS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100609 msbp->msb_delta = tp->t_rextents_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 msbp++;
611 }
612 if (tp->t_rextslog_delta != 0) {
613 msbp->msb_field = XFS_SBS_REXTSLOG;
David Chinner20f4ebf2007-02-10 18:36:10 +1100614 msbp->msb_delta = tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 msbp++;
616 }
617 }
618
619 /*
620 * If we need to change anything, do it.
621 */
622 if (msbp > msb) {
623 error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
624 (uint)(msbp - msb), rsvd);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000625 if (error)
626 goto out_undo_ifreecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 }
Christoph Hellwig1b040712010-09-30 02:25:56 +0000628
629 return;
630
631out_undo_ifreecount:
632 if (ifreedelta)
633 xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd);
634out_undo_icount:
635 if (idelta)
636 xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd);
637out_undo_fdblocks:
638 if (blkdelta)
639 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd);
640out:
Jesper Juhl1884bd82010-12-25 20:14:53 +0000641 ASSERT(error == 0);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000642 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643}
644
Dave Chinner09243782010-03-08 11:28:28 +1100645/*
Christoph Hellwige98c4142010-06-23 18:11:15 +1000646 * Add the given log item to the transaction's list of log items.
647 *
648 * The log item will now point to its new descriptor with its li_desc field.
649 */
650void
651xfs_trans_add_item(
652 struct xfs_trans *tp,
653 struct xfs_log_item *lip)
654{
655 struct xfs_log_item_desc *lidp;
656
Jesper Juhlf65020a2012-02-13 20:51:05 +0000657 ASSERT(lip->li_mountp == tp->t_mountp);
658 ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000659
Dave Chinner43869702010-07-20 17:53:44 +1000660 lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000661
662 lidp->lid_item = lip;
663 lidp->lid_flags = 0;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000664 list_add_tail(&lidp->lid_trans, &tp->t_items);
665
666 lip->li_desc = lidp;
667}
668
669STATIC void
670xfs_trans_free_item_desc(
671 struct xfs_log_item_desc *lidp)
672{
673 list_del_init(&lidp->lid_trans);
674 kmem_zone_free(xfs_log_item_desc_zone, lidp);
675}
676
677/*
678 * Unlink and free the given descriptor.
679 */
680void
681xfs_trans_del_item(
682 struct xfs_log_item *lip)
683{
684 xfs_trans_free_item_desc(lip->li_desc);
685 lip->li_desc = NULL;
686}
687
688/*
689 * Unlock all of the items of a transaction and free all the descriptors
690 * of that transaction.
691 */
Dave Chinnerd17c7012010-08-24 11:42:52 +1000692void
Christoph Hellwige98c4142010-06-23 18:11:15 +1000693xfs_trans_free_items(
694 struct xfs_trans *tp,
695 xfs_lsn_t commit_lsn,
696 int flags)
697{
698 struct xfs_log_item_desc *lidp, *next;
699
700 list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
701 struct xfs_log_item *lip = lidp->lid_item;
702
703 lip->li_desc = NULL;
704
705 if (commit_lsn != NULLCOMMITLSN)
Dave Chinner904c17e2013-08-28 21:12:03 +1000706 lip->li_ops->iop_committing(lip, commit_lsn);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000707 if (flags & XFS_TRANS_ABORT)
708 lip->li_flags |= XFS_LI_ABORTED;
Dave Chinner904c17e2013-08-28 21:12:03 +1000709 lip->li_ops->iop_unlock(lip);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000710
711 xfs_trans_free_item_desc(lidp);
712 }
713}
714
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100715static inline void
716xfs_log_item_batch_insert(
717 struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000718 struct xfs_ail_cursor *cur,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100719 struct xfs_log_item **log_items,
720 int nr_items,
721 xfs_lsn_t commit_lsn)
722{
723 int i;
724
725 spin_lock(&ailp->xa_lock);
726 /* xfs_trans_ail_update_bulk drops ailp->xa_lock */
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000727 xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100728
Dave Chinner904c17e2013-08-28 21:12:03 +1000729 for (i = 0; i < nr_items; i++) {
730 struct xfs_log_item *lip = log_items[i];
731
732 lip->li_ops->iop_unpin(lip, 0);
733 }
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100734}
735
736/*
737 * Bulk operation version of xfs_trans_committed that takes a log vector of
738 * items to insert into the AIL. This uses bulk AIL insertion techniques to
739 * minimise lock traffic.
Dave Chinnere34a3142011-01-27 12:13:35 +1100740 *
741 * If we are called with the aborted flag set, it is because a log write during
742 * a CIL checkpoint commit has failed. In this case, all the items in the
Dave Chinner904c17e2013-08-28 21:12:03 +1000743 * checkpoint have already gone through iop_commited and iop_unlock, which
Dave Chinnere34a3142011-01-27 12:13:35 +1100744 * means that checkpoint commit abort handling is treated exactly the same
745 * as an iclog write error even though we haven't started any IO yet. Hence in
Dave Chinner904c17e2013-08-28 21:12:03 +1000746 * this case all we need to do is iop_committed processing, followed by an
747 * iop_unpin(aborted) call.
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000748 *
749 * The AIL cursor is used to optimise the insert process. If commit_lsn is not
750 * at the end of the AIL, the insert cursor avoids the need to walk
751 * the AIL to find the insertion point on every xfs_log_item_batch_insert()
752 * call. This saves a lot of needless list walking and is a net win, even
753 * though it slightly increases that amount of AIL lock traffic to set it up
754 * and tear it down.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100755 */
756void
757xfs_trans_committed_bulk(
758 struct xfs_ail *ailp,
759 struct xfs_log_vec *log_vector,
760 xfs_lsn_t commit_lsn,
761 int aborted)
762{
763#define LOG_ITEM_BATCH_SIZE 32
764 struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
765 struct xfs_log_vec *lv;
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000766 struct xfs_ail_cursor cur;
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100767 int i = 0;
768
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000769 spin_lock(&ailp->xa_lock);
770 xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
771 spin_unlock(&ailp->xa_lock);
772
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100773 /* unpin all the log items */
774 for (lv = log_vector; lv; lv = lv->lv_next ) {
775 struct xfs_log_item *lip = lv->lv_item;
776 xfs_lsn_t item_lsn;
777
778 if (aborted)
779 lip->li_flags |= XFS_LI_ABORTED;
Dave Chinner904c17e2013-08-28 21:12:03 +1000780 item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100781
Dave Chinner1316d4d2011-07-04 05:27:36 +0000782 /* item_lsn of -1 means the item needs no further processing */
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100783 if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
784 continue;
785
Dave Chinnere34a3142011-01-27 12:13:35 +1100786 /*
787 * if we are aborting the operation, no point in inserting the
788 * object into the AIL as we are in a shutdown situation.
789 */
790 if (aborted) {
791 ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount));
Dave Chinner904c17e2013-08-28 21:12:03 +1000792 lip->li_ops->iop_unpin(lip, 1);
Dave Chinnere34a3142011-01-27 12:13:35 +1100793 continue;
794 }
795
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100796 if (item_lsn != commit_lsn) {
797
798 /*
799 * Not a bulk update option due to unusual item_lsn.
800 * Push into AIL immediately, rechecking the lsn once
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000801 * we have the ail lock. Then unpin the item. This does
802 * not affect the AIL cursor the bulk insert path is
803 * using.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100804 */
805 spin_lock(&ailp->xa_lock);
806 if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
807 xfs_trans_ail_update(ailp, lip, item_lsn);
808 else
809 spin_unlock(&ailp->xa_lock);
Dave Chinner904c17e2013-08-28 21:12:03 +1000810 lip->li_ops->iop_unpin(lip, 0);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100811 continue;
812 }
813
814 /* Item is a candidate for bulk AIL insert. */
815 log_items[i++] = lv->lv_item;
816 if (i >= LOG_ITEM_BATCH_SIZE) {
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000817 xfs_log_item_batch_insert(ailp, &cur, log_items,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100818 LOG_ITEM_BATCH_SIZE, commit_lsn);
819 i = 0;
820 }
821 }
822
823 /* make sure we insert the remainder! */
824 if (i)
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000825 xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
826
827 spin_lock(&ailp->xa_lock);
Eric Sandeene4a1e292014-04-14 19:06:05 +1000828 xfs_trans_ail_cursor_done(&cur);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000829 spin_unlock(&ailp->xa_lock);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100830}
831
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100832/*
Christoph Hellwigb1037052011-09-19 14:55:51 +0000833 * Commit the given transaction to the log.
Dave Chinner09243782010-03-08 11:28:28 +1100834 *
835 * XFS disk error handling mechanism is not based on a typical
836 * transaction abort mechanism. Logically after the filesystem
837 * gets marked 'SHUTDOWN', we can't let any new transactions
838 * be durable - ie. committed to disk - because some metadata might
839 * be inconsistent. In such cases, this returns an error, and the
840 * caller may assume that all locked objects joined to the transaction
841 * have already been unlocked as if the commit had succeeded.
842 * Do not reference the transaction structure after this call.
843 */
Dave Chinner09243782010-03-08 11:28:28 +1100844int
Christoph Hellwigb1037052011-09-19 14:55:51 +0000845xfs_trans_commit(
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100846 struct xfs_trans *tp,
Christoph Hellwigb1037052011-09-19 14:55:51 +0000847 uint flags)
Dave Chinner09243782010-03-08 11:28:28 +1100848{
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100849 struct xfs_mount *mp = tp->t_mountp;
Dave Chinner09243782010-03-08 11:28:28 +1100850 xfs_lsn_t commit_lsn = -1;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100851 int error = 0;
Dave Chinner09243782010-03-08 11:28:28 +1100852 int log_flags = 0;
853 int sync = tp->t_flags & XFS_TRANS_SYNC;
Dave Chinner09243782010-03-08 11:28:28 +1100854
855 /*
856 * Determine whether this commit is releasing a permanent
857 * log reservation or not.
858 */
859 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
860 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
861 log_flags = XFS_LOG_REL_PERM_RESERV;
862 }
863
864 /*
865 * If there is nothing to be logged by the transaction,
866 * then unlock all of the items associated with the
867 * transaction and free the transaction structure.
868 * Also make sure to return any reserved blocks to
869 * the free pool.
870 */
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100871 if (!(tp->t_flags & XFS_TRANS_DIRTY))
872 goto out_unreserve;
873
874 if (XFS_FORCED_SHUTDOWN(mp)) {
Dave Chinner24513372014-06-25 14:58:08 +1000875 error = -EIO;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100876 goto out_unreserve;
Dave Chinner09243782010-03-08 11:28:28 +1100877 }
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100878
Dave Chinner09243782010-03-08 11:28:28 +1100879 ASSERT(tp->t_ticket != NULL);
880
881 /*
882 * If we need to update the superblock, then do it now.
883 */
884 if (tp->t_flags & XFS_TRANS_SB_DIRTY)
885 xfs_trans_apply_sb_deltas(tp);
886 xfs_trans_apply_dquot_deltas(tp);
887
Jie Liuc6f97262014-02-07 15:26:07 +1100888 xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
Christoph Hellwig0244b962011-12-06 21:58:08 +0000890 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
891 xfs_trans_free(tp);
892
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 /*
894 * If the transaction needs to be synchronous, then force the
895 * log out now and wait for it.
896 */
897 if (sync) {
Jie Liuc6f97262014-02-07 15:26:07 +1100898 error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 XFS_STATS_INC(xs_trans_sync);
900 } else {
901 XFS_STATS_INC(xs_trans_async);
902 }
903
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100904 return error;
905
906out_unreserve:
907 xfs_trans_unreserve_and_mod_sb(tp);
908
909 /*
910 * It is indeed possible for the transaction to be not dirty but
911 * the dqinfo portion to be. All that means is that we have some
912 * (non-persistent) quota reservations that need to be unreserved.
913 */
914 xfs_trans_unreserve_and_mod_dquots(tp);
915 if (tp->t_ticket) {
916 commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
917 if (commit_lsn == -1 && !error)
Dave Chinner24513372014-06-25 14:58:08 +1000918 error = -EIO;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100919 }
920 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Dave Chinner71e330b2010-05-21 14:37:18 +1000921 xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100922 xfs_trans_free(tp);
923
924 XFS_STATS_INC(xs_trans_empty);
925 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926}
927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 * Unlock all of the transaction's items and free the transaction.
930 * The transaction must not have modified any of its items, because
931 * there is no way to restore them to their previous state.
932 *
933 * If the transaction has made a log reservation, make sure to release
934 * it as well.
935 */
936void
937xfs_trans_cancel(
938 xfs_trans_t *tp,
939 int flags)
940{
941 int log_flags;
Ryan Hankins0733af22006-01-11 15:36:44 +1100942 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
944 /*
945 * See if the caller is being too lazy to figure out if
946 * the transaction really needs an abort.
947 */
948 if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY))
949 flags &= ~XFS_TRANS_ABORT;
950 /*
951 * See if the caller is relying on us to shut down the
952 * filesystem. This happens in paths where we detect
953 * corruption and decide to give up.
954 */
Nathan Scott60a204f2006-01-11 15:37:00 +1100955 if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) {
Ryan Hankins0733af22006-01-11 15:36:44 +1100956 XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
Nathan Scott7d04a332006-06-09 14:58:38 +1000957 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Nathan Scott60a204f2006-01-11 15:37:00 +1100958 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959#ifdef DEBUG
Christoph Hellwige98c4142010-06-23 18:11:15 +1000960 if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) {
961 struct xfs_log_item_desc *lidp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
Christoph Hellwige98c4142010-06-23 18:11:15 +1000963 list_for_each_entry(lidp, &tp->t_items, lid_trans)
964 ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 }
966#endif
967 xfs_trans_unreserve_and_mod_sb(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200968 xfs_trans_unreserve_and_mod_dquots(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
970 if (tp->t_ticket) {
971 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
972 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
973 log_flags = XFS_LOG_REL_PERM_RESERV;
974 } else {
975 log_flags = 0;
976 }
Ryan Hankins0733af22006-01-11 15:36:44 +1100977 xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 }
979
980 /* mark this thread as no longer being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +1000981 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Dave Chinner71e330b2010-05-21 14:37:18 +1000983 xfs_trans_free_items(tp, NULLCOMMITLSN, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 xfs_trans_free(tp);
985}
986
Niv Sardi322ff6b2008-08-13 16:05:49 +1000987/*
988 * Roll from one trans in the sequence of PERMANENT transactions to
989 * the next: permanent transactions are only flushed out when
990 * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
991 * as possible to let chunks of it go to the log. So we commit the
992 * chunk we've been working on and get a new transaction to continue.
993 */
994int
995xfs_trans_roll(
996 struct xfs_trans **tpp,
997 struct xfs_inode *dp)
998{
999 struct xfs_trans *trans;
Jie Liu3d3c8b52013-08-12 20:49:59 +10001000 struct xfs_trans_res tres;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001001 int error;
1002
1003 /*
1004 * Ensure that the inode is always logged.
1005 */
1006 trans = *tpp;
1007 xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
1008
1009 /*
1010 * Copy the critical parameters from one trans to the next.
1011 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001012 tres.tr_logres = trans->t_log_res;
1013 tres.tr_logcount = trans->t_log_count;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001014 *tpp = xfs_trans_dup(trans);
1015
1016 /*
1017 * Commit the current transaction.
1018 * If this commit failed, then it'd just unlock those items that
1019 * are not marked ihold. That also means that a filesystem shutdown
1020 * is in progress. The caller takes the responsibility to cancel
1021 * the duplicate transaction that gets returned.
1022 */
1023 error = xfs_trans_commit(trans, 0);
1024 if (error)
Eric Sandeend99831f2014-06-22 15:03:54 +10001025 return error;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001026
1027 trans = *tpp;
1028
1029 /*
Dave Chinnercc09c0d2008-11-17 17:37:10 +11001030 * transaction commit worked ok so we can drop the extra ticket
1031 * reference that we gained in xfs_trans_dup()
1032 */
1033 xfs_log_ticket_put(trans->t_ticket);
1034
1035
1036 /*
Niv Sardi322ff6b2008-08-13 16:05:49 +10001037 * Reserve space in the log for th next transaction.
1038 * This also pushes items in the "AIL", the list of logged items,
1039 * out to disk if they are taking up space at the tail of the log
1040 * that we want to use. This requires that either nothing be locked
1041 * across this call, or that anything that is locked be logged in
1042 * the prior and the next transactions.
1043 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001044 tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
1045 error = xfs_trans_reserve(trans, &tres, 0, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001046 /*
1047 * Ensure that the inode is in the new transaction and locked.
1048 */
1049 if (error)
1050 return error;
1051
Christoph Hellwigddc34152011-09-19 15:00:54 +00001052 xfs_trans_ijoin(trans, dp, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001053 return 0;
1054}