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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_sb.h"
26#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Nathan Scotta844f452005-11-02 14:38:42 +110028#include "xfs_inode.h"
Dave Chinnerefc27b52012-04-29 10:39:43 +000029#include "xfs_extent_busy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_quota.h"
Dave Chinner239880e2013-10-23 10:50:10 +110031#include "xfs_trans.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_trans_priv.h"
Dave Chinner239880e2013-10-23 10:50:10 +110033#include "xfs_log.h"
Dave Chinnered3b4d62010-05-21 12:07:08 +100034#include "xfs_trace.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110035#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Nathan Scott8f794052006-03-14 13:32:41 +110037kmem_zone_t *xfs_trans_zone;
Christoph Hellwige98c4142010-06-23 18:11:15 +100038kmem_zone_t *xfs_log_item_desc_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Jeff Liu4f3b5782013-01-28 21:25:35 +080040/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * Initialize the precomputed transaction reservation values
42 * in the mount structure.
43 */
44void
45xfs_trans_init(
Christoph Hellwig025101d2010-05-04 13:53:48 +000046 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
Jie Liu3d3c8b52013-08-12 20:49:59 +100048 xfs_trans_resv_calc(mp, M_RES(mp));
Linus Torvalds1da177e2005-04-16 15:20:36 -070049}
50
51/*
52 * This routine is called to allocate a transaction structure.
53 * The type parameter indicates the type of the transaction. These
54 * are enumerated in xfs_trans.h.
Alex Elderb2ce3972011-07-11 09:51:44 -050055 *
56 * Dynamically allocate the transaction structure from the transaction
57 * zone, initialize it, and return it to the caller.
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 */
Alex Elderb2ce3972011-07-11 09:51:44 -050059xfs_trans_t *
60xfs_trans_alloc(
61 xfs_mount_t *mp,
62 uint type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Jan Karad9457dc2012-06-12 16:20:39 +020064 xfs_trans_t *tp;
65
66 sb_start_intwrite(mp->m_super);
67 tp = _xfs_trans_alloc(mp, type, KM_SLEEP);
68 tp->t_flags |= XFS_TRANS_FREEZE_PROT;
69 return tp;
Alex Elderb2ce3972011-07-11 09:51:44 -050070}
71
72xfs_trans_t *
73_xfs_trans_alloc(
74 xfs_mount_t *mp,
75 uint type,
Al Viro77ba7872012-04-02 06:24:04 -040076 xfs_km_flags_t memflags)
Alex Elderb2ce3972011-07-11 09:51:44 -050077{
78 xfs_trans_t *tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Jan Karad9457dc2012-06-12 16:20:39 +020080 WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE);
Nathan Scott34327e12006-06-09 17:11:55 +100081 atomic_inc(&mp->m_active_trans);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Christoph Hellwig80641dc2009-10-19 04:00:03 +000083 tp = kmem_zone_zalloc(xfs_trans_zone, memflags);
Dave Chinner2a3c0ac2013-08-12 20:49:28 +100084 tp->t_magic = XFS_TRANS_HEADER_MAGIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 tp->t_type = type;
86 tp->t_mountp = mp;
Christoph Hellwige98c4142010-06-23 18:11:15 +100087 INIT_LIST_HEAD(&tp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +100088 INIT_LIST_HEAD(&tp->t_busy);
Nathan Scott34327e12006-06-09 17:11:55 +100089 return tp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
92/*
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110093 * Free the transaction structure. If there is more clean up
94 * to do when the structure is freed, add it here.
95 */
96STATIC void
97xfs_trans_free(
Dave Chinnered3b4d62010-05-21 12:07:08 +100098 struct xfs_trans *tp)
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110099{
Dave Chinner4ecbfe62012-04-29 10:41:10 +0000100 xfs_extent_busy_sort(&tp->t_busy);
101 xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000102
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100103 atomic_dec(&tp->t_mountp->m_active_trans);
Jan Karad9457dc2012-06-12 16:20:39 +0200104 if (tp->t_flags & XFS_TRANS_FREEZE_PROT)
105 sb_end_intwrite(tp->t_mountp->m_super);
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100106 xfs_trans_free_dqinfo(tp);
107 kmem_zone_free(xfs_trans_zone, tp);
108}
109
110/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 * This is called to create a new transaction which will share the
112 * permanent log reservation of the given transaction. The remaining
113 * unused block and rt extent reservations are also inherited. This
114 * implies that the original transaction is no longer allowed to allocate
115 * blocks. Locks and log items, however, are no inherited. They must
116 * be added to the new transaction explicitly.
117 */
118xfs_trans_t *
119xfs_trans_dup(
120 xfs_trans_t *tp)
121{
122 xfs_trans_t *ntp;
123
124 ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
125
126 /*
127 * Initialize the new transaction structure.
128 */
Dave Chinner2a3c0ac2013-08-12 20:49:28 +1000129 ntp->t_magic = XFS_TRANS_HEADER_MAGIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 ntp->t_type = tp->t_type;
131 ntp->t_mountp = tp->t_mountp;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000132 INIT_LIST_HEAD(&ntp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000133 INIT_LIST_HEAD(&ntp->t_busy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 ASSERT(tp->t_ticket != NULL);
Nathan Scottcfcbbbd2005-11-02 15:12:04 +1100137
Jan Karad9457dc2012-06-12 16:20:39 +0200138 ntp->t_flags = XFS_TRANS_PERM_LOG_RES |
139 (tp->t_flags & XFS_TRANS_RESERVE) |
140 (tp->t_flags & XFS_TRANS_FREEZE_PROT);
141 /* We gave our writer reference to the new transaction */
142 tp->t_flags &= ~XFS_TRANS_FREEZE_PROT;
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100143 ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
145 tp->t_blk_res = tp->t_blk_res_used;
146 ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
147 tp->t_rtx_res = tp->t_rtx_res_used;
Nathan Scott59c1b082006-06-09 14:59:13 +1000148 ntp->t_pflags = tp->t_pflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Christoph Hellwig7d095252009-06-08 15:33:32 +0200150 xfs_trans_dup_dqinfo(tp, ntp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 atomic_inc(&tp->t_mountp->m_active_trans);
153 return ntp;
154}
155
156/*
157 * This is called to reserve free disk blocks and log space for the
158 * given transaction. This must be done before allocating any resources
159 * within the transaction.
160 *
161 * This will return ENOSPC if there are not enough blocks available.
162 * It will sleep waiting for available log space.
163 * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
164 * is used by long running transactions. If any one of the reservations
165 * fails then they will all be backed out.
166 *
167 * This does not do quota reservations. That typically is done by the
168 * caller afterwards.
169 */
170int
171xfs_trans_reserve(
Jie Liu3d3c8b52013-08-12 20:49:59 +1000172 struct xfs_trans *tp,
173 struct xfs_trans_res *resp,
174 uint blocks,
175 uint rtextents)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176{
Nathan Scott59c1b082006-06-09 14:59:13 +1000177 int error = 0;
178 int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 /* Mark this thread as being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +1000181 current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183 /*
184 * Attempt to reserve the needed disk blocks by decrementing
185 * the number needed from the number available. This will
186 * fail if the count would go below zero.
187 */
188 if (blocks > 0) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000189 error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100190 -((int64_t)blocks), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 if (error != 0) {
Nathan Scott59c1b082006-06-09 14:59:13 +1000192 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return (XFS_ERROR(ENOSPC));
194 }
195 tp->t_blk_res += blocks;
196 }
197
198 /*
199 * Reserve the log space needed for this transaction.
200 */
Jie Liu3d3c8b52013-08-12 20:49:59 +1000201 if (resp->tr_logres > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000202 bool permanent = false;
203
Jie Liu3d3c8b52013-08-12 20:49:59 +1000204 ASSERT(tp->t_log_res == 0 ||
205 tp->t_log_res == resp->tr_logres);
206 ASSERT(tp->t_log_count == 0 ||
207 tp->t_log_count == resp->tr_logcount);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000208
Jie Liu3d3c8b52013-08-12 20:49:59 +1000209 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000211 permanent = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 } else {
213 ASSERT(tp->t_ticket == NULL);
214 ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 }
216
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000217 if (tp->t_ticket != NULL) {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000218 ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000219 error = xfs_log_regrant(tp->t_mountp, tp->t_ticket);
220 } else {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000221 error = xfs_log_reserve(tp->t_mountp,
222 resp->tr_logres,
223 resp->tr_logcount,
224 &tp->t_ticket, XFS_TRANSACTION,
225 permanent, tp->t_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000227
228 if (error)
229 goto undo_blocks;
230
Jie Liu3d3c8b52013-08-12 20:49:59 +1000231 tp->t_log_res = resp->tr_logres;
232 tp->t_log_count = resp->tr_logcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
234
235 /*
236 * Attempt to reserve the needed realtime extents by decrementing
237 * the number needed from the number available. This will
238 * fail if the count would go below zero.
239 */
240 if (rtextents > 0) {
241 error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100242 -((int64_t)rtextents), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 if (error) {
244 error = XFS_ERROR(ENOSPC);
245 goto undo_log;
246 }
247 tp->t_rtx_res += rtextents;
248 }
249
250 return 0;
251
252 /*
253 * Error cases jump to one of these labels to undo any
254 * reservations which have already been performed.
255 */
256undo_log:
Jie Liu3d3c8b52013-08-12 20:49:59 +1000257 if (resp->tr_logres > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000258 int log_flags;
259
Jie Liu3d3c8b52013-08-12 20:49:59 +1000260 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 log_flags = XFS_LOG_REL_PERM_RESERV;
262 } else {
263 log_flags = 0;
264 }
265 xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags);
266 tp->t_ticket = NULL;
267 tp->t_log_res = 0;
268 tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
269 }
270
271undo_blocks:
272 if (blocks > 0) {
Christoph Hellwig96540c72010-09-30 02:25:55 +0000273 xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS,
David Chinner20f4ebf2007-02-10 18:36:10 +1100274 (int64_t)blocks, rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 tp->t_blk_res = 0;
276 }
277
Nathan Scott59c1b082006-06-09 14:59:13 +1000278 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Nathan Scott59c1b082006-06-09 14:59:13 +1000280 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 * Record the indicated change to the given field for application
285 * to the file system's superblock when the transaction commits.
286 * For now, just store the change in the transaction structure.
287 *
288 * Mark the transaction structure to indicate that the superblock
289 * needs to be updated before committing.
David Chinner92821e22007-05-24 15:26:31 +1000290 *
291 * Because we may not be keeping track of allocated/free inodes and
292 * used filesystem blocks in the superblock, we do not mark the
293 * superblock dirty in this transaction if we modify these fields.
294 * We still need to update the transaction deltas so that they get
295 * applied to the incore superblock, but we don't want them to
296 * cause the superblock to get locked and logged if these are the
297 * only fields in the superblock that the transaction modifies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 */
299void
300xfs_trans_mod_sb(
301 xfs_trans_t *tp,
302 uint field,
David Chinner20f4ebf2007-02-10 18:36:10 +1100303 int64_t delta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
David Chinner92821e22007-05-24 15:26:31 +1000305 uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
306 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 switch (field) {
309 case XFS_TRANS_SB_ICOUNT:
310 tp->t_icount_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000311 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
312 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 break;
314 case XFS_TRANS_SB_IFREE:
315 tp->t_ifree_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000316 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
317 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 break;
319 case XFS_TRANS_SB_FDBLOCKS:
320 /*
321 * Track the number of blocks allocated in the
322 * transaction. Make sure it does not exceed the
323 * number reserved.
324 */
325 if (delta < 0) {
326 tp->t_blk_res_used += (uint)-delta;
327 ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
328 }
329 tp->t_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000330 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
331 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 break;
333 case XFS_TRANS_SB_RES_FDBLOCKS:
334 /*
335 * The allocation has already been applied to the
336 * in-core superblock's counter. This should only
337 * be applied to the on-disk superblock.
338 */
339 ASSERT(delta < 0);
340 tp->t_res_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000341 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
342 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 break;
344 case XFS_TRANS_SB_FREXTENTS:
345 /*
346 * Track the number of blocks allocated in the
347 * transaction. Make sure it does not exceed the
348 * number reserved.
349 */
350 if (delta < 0) {
351 tp->t_rtx_res_used += (uint)-delta;
352 ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
353 }
354 tp->t_frextents_delta += delta;
355 break;
356 case XFS_TRANS_SB_RES_FREXTENTS:
357 /*
358 * The allocation has already been applied to the
Nathan Scottc41564b2006-03-29 08:55:14 +1000359 * in-core superblock's counter. This should only
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 * be applied to the on-disk superblock.
361 */
362 ASSERT(delta < 0);
363 tp->t_res_frextents_delta += delta;
364 break;
365 case XFS_TRANS_SB_DBLOCKS:
366 ASSERT(delta > 0);
367 tp->t_dblocks_delta += delta;
368 break;
369 case XFS_TRANS_SB_AGCOUNT:
370 ASSERT(delta > 0);
371 tp->t_agcount_delta += delta;
372 break;
373 case XFS_TRANS_SB_IMAXPCT:
374 tp->t_imaxpct_delta += delta;
375 break;
376 case XFS_TRANS_SB_REXTSIZE:
377 tp->t_rextsize_delta += delta;
378 break;
379 case XFS_TRANS_SB_RBMBLOCKS:
380 tp->t_rbmblocks_delta += delta;
381 break;
382 case XFS_TRANS_SB_RBLOCKS:
383 tp->t_rblocks_delta += delta;
384 break;
385 case XFS_TRANS_SB_REXTENTS:
386 tp->t_rextents_delta += delta;
387 break;
388 case XFS_TRANS_SB_REXTSLOG:
389 tp->t_rextslog_delta += delta;
390 break;
391 default:
392 ASSERT(0);
393 return;
394 }
395
David Chinner210c6f12007-05-24 15:26:51 +1000396 tp->t_flags |= flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397}
398
399/*
400 * xfs_trans_apply_sb_deltas() is called from the commit code
401 * to bring the superblock buffer into the current transaction
402 * and modify it as requested by earlier calls to xfs_trans_mod_sb().
403 *
404 * For now we just look at each field allowed to change and change
405 * it if necessary.
406 */
407STATIC void
408xfs_trans_apply_sb_deltas(
409 xfs_trans_t *tp)
410{
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000411 xfs_dsb_t *sbp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 xfs_buf_t *bp;
413 int whole = 0;
414
415 bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
416 sbp = XFS_BUF_TO_SBP(bp);
417
418 /*
419 * Check that superblock mods match the mods made to AGF counters.
420 */
421 ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
422 (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
423 tp->t_ag_btree_delta));
424
David Chinner92821e22007-05-24 15:26:31 +1000425 /*
426 * Only update the superblock counters if we are logging them
427 */
428 if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000429 if (tp->t_icount_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800430 be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000431 if (tp->t_ifree_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800432 be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000433 if (tp->t_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800434 be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000435 if (tp->t_res_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800436 be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
438
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000439 if (tp->t_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800440 be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000441 if (tp->t_res_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800442 be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000443
444 if (tp->t_dblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800445 be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 whole = 1;
447 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000448 if (tp->t_agcount_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800449 be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 whole = 1;
451 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000452 if (tp->t_imaxpct_delta) {
453 sbp->sb_imax_pct += tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 whole = 1;
455 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000456 if (tp->t_rextsize_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800457 be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 whole = 1;
459 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000460 if (tp->t_rbmblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800461 be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 whole = 1;
463 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000464 if (tp->t_rblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800465 be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 whole = 1;
467 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000468 if (tp->t_rextents_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800469 be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 whole = 1;
471 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000472 if (tp->t_rextslog_delta) {
473 sbp->sb_rextslog += tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 whole = 1;
475 }
476
477 if (whole)
478 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000479 * Log the whole thing, the fields are noncontiguous.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000481 xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 else
483 /*
484 * Since all the modifiable fields are contiguous, we
485 * can get away with this.
486 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000487 xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
488 offsetof(xfs_dsb_t, sb_frextents) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 sizeof(sbp->sb_frextents) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490}
491
492/*
David Chinner45c34142007-06-18 16:49:44 +1000493 * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
494 * and apply superblock counter changes to the in-core superblock. The
495 * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
496 * applied to the in-core superblock. The idea is that that has already been
497 * done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 *
499 * This is done efficiently with a single call to xfs_mod_incore_sb_batch().
David Chinner45c34142007-06-18 16:49:44 +1000500 * However, we have to ensure that we only modify each superblock field only
501 * once because the application of the delta values may not be atomic. That can
502 * lead to ENOSPC races occurring if we have two separate modifcations of the
503 * free space counter to put back the entire reservation and then take away
504 * what we used.
505 *
506 * If we are not logging superblock counters, then the inode allocated/free and
507 * used block counts are not updated in the on disk superblock. In this case,
508 * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
509 * still need to update the incore superblock with the changes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 */
Dave Chinner71e330b2010-05-21 14:37:18 +1000511void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512xfs_trans_unreserve_and_mod_sb(
513 xfs_trans_t *tp)
514{
Christoph Hellwig1b040712010-09-30 02:25:56 +0000515 xfs_mod_sb_t msb[9]; /* If you add cases, add entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 xfs_mod_sb_t *msbp;
David Chinner92821e22007-05-24 15:26:31 +1000517 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 /* REFERENCED */
519 int error;
520 int rsvd;
David Chinner45c34142007-06-18 16:49:44 +1000521 int64_t blkdelta = 0;
522 int64_t rtxdelta = 0;
Christoph Hellwig1b040712010-09-30 02:25:56 +0000523 int64_t idelta = 0;
524 int64_t ifreedelta = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526 msbp = msb;
527 rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
528
Christoph Hellwig1b040712010-09-30 02:25:56 +0000529 /* calculate deltas */
David Chinner45c34142007-06-18 16:49:44 +1000530 if (tp->t_blk_res > 0)
531 blkdelta = tp->t_blk_res;
David Chinner45c34142007-06-18 16:49:44 +1000532 if ((tp->t_fdblocks_delta != 0) &&
533 (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
534 (tp->t_flags & XFS_TRANS_SB_DIRTY)))
535 blkdelta += tp->t_fdblocks_delta;
536
David Chinner45c34142007-06-18 16:49:44 +1000537 if (tp->t_rtx_res > 0)
538 rtxdelta = tp->t_rtx_res;
David Chinner45c34142007-06-18 16:49:44 +1000539 if ((tp->t_frextents_delta != 0) &&
540 (tp->t_flags & XFS_TRANS_SB_DIRTY))
541 rtxdelta += tp->t_frextents_delta;
542
Christoph Hellwig1b040712010-09-30 02:25:56 +0000543 if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
544 (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
545 idelta = tp->t_icount_delta;
546 ifreedelta = tp->t_ifree_delta;
547 }
548
549 /* apply the per-cpu counters */
550 if (blkdelta) {
551 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
552 blkdelta, rsvd);
553 if (error)
554 goto out;
555 }
556
557 if (idelta) {
558 error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT,
559 idelta, rsvd);
560 if (error)
561 goto out_undo_fdblocks;
562 }
563
564 if (ifreedelta) {
565 error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE,
566 ifreedelta, rsvd);
567 if (error)
568 goto out_undo_icount;
569 }
570
571 /* apply remaining deltas */
David Chinner45c34142007-06-18 16:49:44 +1000572 if (rtxdelta != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 msbp->msb_field = XFS_SBS_FREXTENTS;
David Chinner45c34142007-06-18 16:49:44 +1000574 msbp->msb_delta = rtxdelta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 msbp++;
576 }
577
David Chinner92821e22007-05-24 15:26:31 +1000578 if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 if (tp->t_dblocks_delta != 0) {
580 msbp->msb_field = XFS_SBS_DBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100581 msbp->msb_delta = tp->t_dblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 msbp++;
583 }
584 if (tp->t_agcount_delta != 0) {
585 msbp->msb_field = XFS_SBS_AGCOUNT;
David Chinner20f4ebf2007-02-10 18:36:10 +1100586 msbp->msb_delta = tp->t_agcount_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 msbp++;
588 }
589 if (tp->t_imaxpct_delta != 0) {
590 msbp->msb_field = XFS_SBS_IMAX_PCT;
David Chinner20f4ebf2007-02-10 18:36:10 +1100591 msbp->msb_delta = tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 msbp++;
593 }
594 if (tp->t_rextsize_delta != 0) {
595 msbp->msb_field = XFS_SBS_REXTSIZE;
David Chinner20f4ebf2007-02-10 18:36:10 +1100596 msbp->msb_delta = tp->t_rextsize_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 msbp++;
598 }
599 if (tp->t_rbmblocks_delta != 0) {
600 msbp->msb_field = XFS_SBS_RBMBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100601 msbp->msb_delta = tp->t_rbmblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 msbp++;
603 }
604 if (tp->t_rblocks_delta != 0) {
605 msbp->msb_field = XFS_SBS_RBLOCKS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100606 msbp->msb_delta = tp->t_rblocks_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 msbp++;
608 }
609 if (tp->t_rextents_delta != 0) {
610 msbp->msb_field = XFS_SBS_REXTENTS;
David Chinner20f4ebf2007-02-10 18:36:10 +1100611 msbp->msb_delta = tp->t_rextents_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 msbp++;
613 }
614 if (tp->t_rextslog_delta != 0) {
615 msbp->msb_field = XFS_SBS_REXTSLOG;
David Chinner20f4ebf2007-02-10 18:36:10 +1100616 msbp->msb_delta = tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 msbp++;
618 }
619 }
620
621 /*
622 * If we need to change anything, do it.
623 */
624 if (msbp > msb) {
625 error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
626 (uint)(msbp - msb), rsvd);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000627 if (error)
628 goto out_undo_ifreecount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 }
Christoph Hellwig1b040712010-09-30 02:25:56 +0000630
631 return;
632
633out_undo_ifreecount:
634 if (ifreedelta)
635 xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd);
636out_undo_icount:
637 if (idelta)
638 xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd);
639out_undo_fdblocks:
640 if (blkdelta)
641 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd);
642out:
Jesper Juhl1884bd82010-12-25 20:14:53 +0000643 ASSERT(error == 0);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000644 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645}
646
Dave Chinner09243782010-03-08 11:28:28 +1100647/*
Christoph Hellwige98c4142010-06-23 18:11:15 +1000648 * Add the given log item to the transaction's list of log items.
649 *
650 * The log item will now point to its new descriptor with its li_desc field.
651 */
652void
653xfs_trans_add_item(
654 struct xfs_trans *tp,
655 struct xfs_log_item *lip)
656{
657 struct xfs_log_item_desc *lidp;
658
Jesper Juhlf65020a2012-02-13 20:51:05 +0000659 ASSERT(lip->li_mountp == tp->t_mountp);
660 ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000661
Dave Chinner43869702010-07-20 17:53:44 +1000662 lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000663
664 lidp->lid_item = lip;
665 lidp->lid_flags = 0;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000666 list_add_tail(&lidp->lid_trans, &tp->t_items);
667
668 lip->li_desc = lidp;
669}
670
671STATIC void
672xfs_trans_free_item_desc(
673 struct xfs_log_item_desc *lidp)
674{
675 list_del_init(&lidp->lid_trans);
676 kmem_zone_free(xfs_log_item_desc_zone, lidp);
677}
678
679/*
680 * Unlink and free the given descriptor.
681 */
682void
683xfs_trans_del_item(
684 struct xfs_log_item *lip)
685{
686 xfs_trans_free_item_desc(lip->li_desc);
687 lip->li_desc = NULL;
688}
689
690/*
691 * Unlock all of the items of a transaction and free all the descriptors
692 * of that transaction.
693 */
Dave Chinnerd17c7012010-08-24 11:42:52 +1000694void
Christoph Hellwige98c4142010-06-23 18:11:15 +1000695xfs_trans_free_items(
696 struct xfs_trans *tp,
697 xfs_lsn_t commit_lsn,
698 int flags)
699{
700 struct xfs_log_item_desc *lidp, *next;
701
702 list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
703 struct xfs_log_item *lip = lidp->lid_item;
704
705 lip->li_desc = NULL;
706
707 if (commit_lsn != NULLCOMMITLSN)
Dave Chinner904c17e2013-08-28 21:12:03 +1000708 lip->li_ops->iop_committing(lip, commit_lsn);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000709 if (flags & XFS_TRANS_ABORT)
710 lip->li_flags |= XFS_LI_ABORTED;
Dave Chinner904c17e2013-08-28 21:12:03 +1000711 lip->li_ops->iop_unlock(lip);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000712
713 xfs_trans_free_item_desc(lidp);
714 }
715}
716
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100717static inline void
718xfs_log_item_batch_insert(
719 struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000720 struct xfs_ail_cursor *cur,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100721 struct xfs_log_item **log_items,
722 int nr_items,
723 xfs_lsn_t commit_lsn)
724{
725 int i;
726
727 spin_lock(&ailp->xa_lock);
728 /* xfs_trans_ail_update_bulk drops ailp->xa_lock */
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000729 xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100730
Dave Chinner904c17e2013-08-28 21:12:03 +1000731 for (i = 0; i < nr_items; i++) {
732 struct xfs_log_item *lip = log_items[i];
733
734 lip->li_ops->iop_unpin(lip, 0);
735 }
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100736}
737
738/*
739 * Bulk operation version of xfs_trans_committed that takes a log vector of
740 * items to insert into the AIL. This uses bulk AIL insertion techniques to
741 * minimise lock traffic.
Dave Chinnere34a3142011-01-27 12:13:35 +1100742 *
743 * If we are called with the aborted flag set, it is because a log write during
744 * a CIL checkpoint commit has failed. In this case, all the items in the
Dave Chinner904c17e2013-08-28 21:12:03 +1000745 * checkpoint have already gone through iop_commited and iop_unlock, which
Dave Chinnere34a3142011-01-27 12:13:35 +1100746 * means that checkpoint commit abort handling is treated exactly the same
747 * as an iclog write error even though we haven't started any IO yet. Hence in
Dave Chinner904c17e2013-08-28 21:12:03 +1000748 * this case all we need to do is iop_committed processing, followed by an
749 * iop_unpin(aborted) call.
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000750 *
751 * The AIL cursor is used to optimise the insert process. If commit_lsn is not
752 * at the end of the AIL, the insert cursor avoids the need to walk
753 * the AIL to find the insertion point on every xfs_log_item_batch_insert()
754 * call. This saves a lot of needless list walking and is a net win, even
755 * though it slightly increases that amount of AIL lock traffic to set it up
756 * and tear it down.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100757 */
758void
759xfs_trans_committed_bulk(
760 struct xfs_ail *ailp,
761 struct xfs_log_vec *log_vector,
762 xfs_lsn_t commit_lsn,
763 int aborted)
764{
765#define LOG_ITEM_BATCH_SIZE 32
766 struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
767 struct xfs_log_vec *lv;
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000768 struct xfs_ail_cursor cur;
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100769 int i = 0;
770
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000771 spin_lock(&ailp->xa_lock);
772 xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
773 spin_unlock(&ailp->xa_lock);
774
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100775 /* unpin all the log items */
776 for (lv = log_vector; lv; lv = lv->lv_next ) {
777 struct xfs_log_item *lip = lv->lv_item;
778 xfs_lsn_t item_lsn;
779
780 if (aborted)
781 lip->li_flags |= XFS_LI_ABORTED;
Dave Chinner904c17e2013-08-28 21:12:03 +1000782 item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100783
Dave Chinner1316d4d2011-07-04 05:27:36 +0000784 /* item_lsn of -1 means the item needs no further processing */
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100785 if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
786 continue;
787
Dave Chinnere34a3142011-01-27 12:13:35 +1100788 /*
789 * if we are aborting the operation, no point in inserting the
790 * object into the AIL as we are in a shutdown situation.
791 */
792 if (aborted) {
793 ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount));
Dave Chinner904c17e2013-08-28 21:12:03 +1000794 lip->li_ops->iop_unpin(lip, 1);
Dave Chinnere34a3142011-01-27 12:13:35 +1100795 continue;
796 }
797
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100798 if (item_lsn != commit_lsn) {
799
800 /*
801 * Not a bulk update option due to unusual item_lsn.
802 * Push into AIL immediately, rechecking the lsn once
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000803 * we have the ail lock. Then unpin the item. This does
804 * not affect the AIL cursor the bulk insert path is
805 * using.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100806 */
807 spin_lock(&ailp->xa_lock);
808 if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
809 xfs_trans_ail_update(ailp, lip, item_lsn);
810 else
811 spin_unlock(&ailp->xa_lock);
Dave Chinner904c17e2013-08-28 21:12:03 +1000812 lip->li_ops->iop_unpin(lip, 0);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100813 continue;
814 }
815
816 /* Item is a candidate for bulk AIL insert. */
817 log_items[i++] = lv->lv_item;
818 if (i >= LOG_ITEM_BATCH_SIZE) {
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000819 xfs_log_item_batch_insert(ailp, &cur, log_items,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100820 LOG_ITEM_BATCH_SIZE, commit_lsn);
821 i = 0;
822 }
823 }
824
825 /* make sure we insert the remainder! */
826 if (i)
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000827 xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
828
829 spin_lock(&ailp->xa_lock);
Eric Sandeene4a1e292014-04-14 19:06:05 +1000830 xfs_trans_ail_cursor_done(&cur);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000831 spin_unlock(&ailp->xa_lock);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100832}
833
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100834/*
Christoph Hellwigb1037052011-09-19 14:55:51 +0000835 * Commit the given transaction to the log.
Dave Chinner09243782010-03-08 11:28:28 +1100836 *
837 * XFS disk error handling mechanism is not based on a typical
838 * transaction abort mechanism. Logically after the filesystem
839 * gets marked 'SHUTDOWN', we can't let any new transactions
840 * be durable - ie. committed to disk - because some metadata might
841 * be inconsistent. In such cases, this returns an error, and the
842 * caller may assume that all locked objects joined to the transaction
843 * have already been unlocked as if the commit had succeeded.
844 * Do not reference the transaction structure after this call.
845 */
Dave Chinner09243782010-03-08 11:28:28 +1100846int
Christoph Hellwigb1037052011-09-19 14:55:51 +0000847xfs_trans_commit(
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100848 struct xfs_trans *tp,
Christoph Hellwigb1037052011-09-19 14:55:51 +0000849 uint flags)
Dave Chinner09243782010-03-08 11:28:28 +1100850{
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100851 struct xfs_mount *mp = tp->t_mountp;
Dave Chinner09243782010-03-08 11:28:28 +1100852 xfs_lsn_t commit_lsn = -1;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100853 int error = 0;
Dave Chinner09243782010-03-08 11:28:28 +1100854 int log_flags = 0;
855 int sync = tp->t_flags & XFS_TRANS_SYNC;
Dave Chinner09243782010-03-08 11:28:28 +1100856
857 /*
858 * Determine whether this commit is releasing a permanent
859 * log reservation or not.
860 */
861 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
862 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
863 log_flags = XFS_LOG_REL_PERM_RESERV;
864 }
865
866 /*
867 * If there is nothing to be logged by the transaction,
868 * then unlock all of the items associated with the
869 * transaction and free the transaction structure.
870 * Also make sure to return any reserved blocks to
871 * the free pool.
872 */
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100873 if (!(tp->t_flags & XFS_TRANS_DIRTY))
874 goto out_unreserve;
875
876 if (XFS_FORCED_SHUTDOWN(mp)) {
877 error = XFS_ERROR(EIO);
878 goto out_unreserve;
Dave Chinner09243782010-03-08 11:28:28 +1100879 }
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100880
Dave Chinner09243782010-03-08 11:28:28 +1100881 ASSERT(tp->t_ticket != NULL);
882
883 /*
884 * If we need to update the superblock, then do it now.
885 */
886 if (tp->t_flags & XFS_TRANS_SB_DIRTY)
887 xfs_trans_apply_sb_deltas(tp);
888 xfs_trans_apply_dquot_deltas(tp);
889
Jie Liuc6f97262014-02-07 15:26:07 +1100890 xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
Christoph Hellwig0244b962011-12-06 21:58:08 +0000892 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
893 xfs_trans_free(tp);
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 /*
896 * If the transaction needs to be synchronous, then force the
897 * log out now and wait for it.
898 */
899 if (sync) {
Jie Liuc6f97262014-02-07 15:26:07 +1100900 error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 XFS_STATS_INC(xs_trans_sync);
902 } else {
903 XFS_STATS_INC(xs_trans_async);
904 }
905
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100906 return error;
907
908out_unreserve:
909 xfs_trans_unreserve_and_mod_sb(tp);
910
911 /*
912 * It is indeed possible for the transaction to be not dirty but
913 * the dqinfo portion to be. All that means is that we have some
914 * (non-persistent) quota reservations that need to be unreserved.
915 */
916 xfs_trans_unreserve_and_mod_dquots(tp);
917 if (tp->t_ticket) {
918 commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
919 if (commit_lsn == -1 && !error)
920 error = XFS_ERROR(EIO);
921 }
922 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Dave Chinner71e330b2010-05-21 14:37:18 +1000923 xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100924 xfs_trans_free(tp);
925
926 XFS_STATS_INC(xs_trans_empty);
927 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928}
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 * Unlock all of the transaction's items and free the transaction.
932 * The transaction must not have modified any of its items, because
933 * there is no way to restore them to their previous state.
934 *
935 * If the transaction has made a log reservation, make sure to release
936 * it as well.
937 */
938void
939xfs_trans_cancel(
940 xfs_trans_t *tp,
941 int flags)
942{
943 int log_flags;
Ryan Hankins0733af22006-01-11 15:36:44 +1100944 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
946 /*
947 * See if the caller is being too lazy to figure out if
948 * the transaction really needs an abort.
949 */
950 if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY))
951 flags &= ~XFS_TRANS_ABORT;
952 /*
953 * See if the caller is relying on us to shut down the
954 * filesystem. This happens in paths where we detect
955 * corruption and decide to give up.
956 */
Nathan Scott60a204f2006-01-11 15:37:00 +1100957 if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) {
Ryan Hankins0733af22006-01-11 15:36:44 +1100958 XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
Nathan Scott7d04a332006-06-09 14:58:38 +1000959 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Nathan Scott60a204f2006-01-11 15:37:00 +1100960 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961#ifdef DEBUG
Christoph Hellwige98c4142010-06-23 18:11:15 +1000962 if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) {
963 struct xfs_log_item_desc *lidp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
Christoph Hellwige98c4142010-06-23 18:11:15 +1000965 list_for_each_entry(lidp, &tp->t_items, lid_trans)
966 ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 }
968#endif
969 xfs_trans_unreserve_and_mod_sb(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200970 xfs_trans_unreserve_and_mod_dquots(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
972 if (tp->t_ticket) {
973 if (flags & XFS_TRANS_RELEASE_LOG_RES) {
974 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
975 log_flags = XFS_LOG_REL_PERM_RESERV;
976 } else {
977 log_flags = 0;
978 }
Ryan Hankins0733af22006-01-11 15:36:44 +1100979 xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 }
981
982 /* mark this thread as no longer being in a transaction */
Nathan Scott59c1b082006-06-09 14:59:13 +1000983 current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
Dave Chinner71e330b2010-05-21 14:37:18 +1000985 xfs_trans_free_items(tp, NULLCOMMITLSN, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 xfs_trans_free(tp);
987}
988
Niv Sardi322ff6b2008-08-13 16:05:49 +1000989/*
990 * Roll from one trans in the sequence of PERMANENT transactions to
991 * the next: permanent transactions are only flushed out when
992 * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
993 * as possible to let chunks of it go to the log. So we commit the
994 * chunk we've been working on and get a new transaction to continue.
995 */
996int
997xfs_trans_roll(
998 struct xfs_trans **tpp,
999 struct xfs_inode *dp)
1000{
1001 struct xfs_trans *trans;
Jie Liu3d3c8b52013-08-12 20:49:59 +10001002 struct xfs_trans_res tres;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001003 int error;
1004
1005 /*
1006 * Ensure that the inode is always logged.
1007 */
1008 trans = *tpp;
1009 xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
1010
1011 /*
1012 * Copy the critical parameters from one trans to the next.
1013 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001014 tres.tr_logres = trans->t_log_res;
1015 tres.tr_logcount = trans->t_log_count;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001016 *tpp = xfs_trans_dup(trans);
1017
1018 /*
1019 * Commit the current transaction.
1020 * If this commit failed, then it'd just unlock those items that
1021 * are not marked ihold. That also means that a filesystem shutdown
1022 * is in progress. The caller takes the responsibility to cancel
1023 * the duplicate transaction that gets returned.
1024 */
1025 error = xfs_trans_commit(trans, 0);
1026 if (error)
1027 return (error);
1028
1029 trans = *tpp;
1030
1031 /*
Dave Chinnercc09c0d2008-11-17 17:37:10 +11001032 * transaction commit worked ok so we can drop the extra ticket
1033 * reference that we gained in xfs_trans_dup()
1034 */
1035 xfs_log_ticket_put(trans->t_ticket);
1036
1037
1038 /*
Niv Sardi322ff6b2008-08-13 16:05:49 +10001039 * Reserve space in the log for th next transaction.
1040 * This also pushes items in the "AIL", the list of logged items,
1041 * out to disk if they are taking up space at the tail of the log
1042 * that we want to use. This requires that either nothing be locked
1043 * across this call, or that anything that is locked be logged in
1044 * the prior and the next transactions.
1045 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001046 tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
1047 error = xfs_trans_reserve(trans, &tres, 0, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001048 /*
1049 * Ensure that the inode is in the new transaction and locked.
1050 */
1051 if (error)
1052 return error;
1053
Christoph Hellwigddc34152011-09-19 15:00:54 +00001054 xfs_trans_ijoin(trans, dp, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001055 return 0;
1056}