blob: e040af120b69b3a69b38517cde3092773b391260 [file] [log] [blame]
Dave Chinner0b61f8a2018-06-05 19:42:14 -07001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
Nathan Scott7b718762005-11-02 14:58:39 +11003 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
Christoph Hellwige98c4142010-06-23 18:11:15 +10004 * Copyright (C) 2010 Red Hat, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11005 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +11008#include "xfs_fs.h"
Dave Chinner70a98832013-10-23 10:36:05 +11009#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110010#include "xfs_format.h"
11#include "xfs_log_format.h"
12#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include "xfs_mount.h"
Nathan Scotta844f452005-11-02 14:38:42 +110014#include "xfs_inode.h"
Dave Chinnerefc27b52012-04-29 10:39:43 +000015#include "xfs_extent_busy.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include "xfs_quota.h"
Dave Chinner239880e2013-10-23 10:50:10 +110017#include "xfs_trans.h"
Nathan Scotta844f452005-11-02 14:38:42 +110018#include "xfs_trans_priv.h"
Dave Chinner239880e2013-10-23 10:50:10 +110019#include "xfs_log.h"
Dave Chinnered3b4d62010-05-21 12:07:08 +100020#include "xfs_trace.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110021#include "xfs_error.h"
Brian Fosterf8f28352018-05-07 17:38:47 -070022#include "xfs_defer.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
Nathan Scott8f794052006-03-14 13:32:41 +110024kmem_zone_t *xfs_trans_zone;
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Darrick J. Wongb872af22018-01-08 10:51:26 -080026#if defined(CONFIG_TRACEPOINTS)
27static void
28xfs_trans_trace_reservations(
29 struct xfs_mount *mp)
30{
31 struct xfs_trans_res resv;
32 struct xfs_trans_res *res;
33 struct xfs_trans_res *end_res;
34 int i;
35
36 res = (struct xfs_trans_res *)M_RES(mp);
37 end_res = (struct xfs_trans_res *)(M_RES(mp) + 1);
38 for (i = 0; res < end_res; i++, res++)
39 trace_xfs_trans_resv_calc(mp, i, res);
40 xfs_log_get_max_trans_res(mp, &resv);
41 trace_xfs_trans_resv_calc(mp, -1, &resv);
42}
43#else
44# define xfs_trans_trace_reservations(mp)
45#endif
46
Jeff Liu4f3b5782013-01-28 21:25:35 +080047/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 * Initialize the precomputed transaction reservation values
49 * in the mount structure.
50 */
51void
52xfs_trans_init(
Christoph Hellwig025101d2010-05-04 13:53:48 +000053 struct xfs_mount *mp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
Jie Liu3d3c8b52013-08-12 20:49:59 +100055 xfs_trans_resv_calc(mp, M_RES(mp));
Darrick J. Wongb872af22018-01-08 10:51:26 -080056 xfs_trans_trace_reservations(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057}
58
59/*
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110060 * Free the transaction structure. If there is more clean up
61 * to do when the structure is freed, add it here.
62 */
63STATIC void
64xfs_trans_free(
Dave Chinnered3b4d62010-05-21 12:07:08 +100065 struct xfs_trans *tp)
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110066{
Dave Chinner4ecbfe62012-04-29 10:41:10 +000067 xfs_extent_busy_sort(&tp->t_busy);
68 xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false);
Dave Chinnered3b4d62010-05-21 12:07:08 +100069
Dave Chinnerba187812018-05-09 07:47:57 -070070 trace_xfs_trans_free(tp, _RET_IP_);
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110071 atomic_dec(&tp->t_mountp->m_active_trans);
Christoph Hellwig253f4912016-04-06 09:19:55 +100072 if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT))
Jan Karad9457dc2012-06-12 16:20:39 +020073 sb_end_intwrite(tp->t_mountp->m_super);
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +110074 xfs_trans_free_dqinfo(tp);
75 kmem_zone_free(xfs_trans_zone, tp);
76}
77
78/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 * This is called to create a new transaction which will share the
80 * permanent log reservation of the given transaction. The remaining
81 * unused block and rt extent reservations are also inherited. This
82 * implies that the original transaction is no longer allowed to allocate
83 * blocks. Locks and log items, however, are no inherited. They must
84 * be added to the new transaction explicitly.
85 */
Brian Fosterf8f28352018-05-07 17:38:47 -070086STATIC struct xfs_trans *
Linus Torvalds1da177e2005-04-16 15:20:36 -070087xfs_trans_dup(
Brian Fosterf8f28352018-05-07 17:38:47 -070088 struct xfs_trans *tp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
Brian Fosterf8f28352018-05-07 17:38:47 -070090 struct xfs_trans *ntp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Dave Chinnerba187812018-05-09 07:47:57 -070092 trace_xfs_trans_dup(tp, _RET_IP_);
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
95
96 /*
97 * Initialize the new transaction structure.
98 */
Dave Chinner2a3c0ac2013-08-12 20:49:28 +100099 ntp->t_magic = XFS_TRANS_HEADER_MAGIC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 ntp->t_mountp = tp->t_mountp;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000101 INIT_LIST_HEAD(&ntp->t_items);
Dave Chinnered3b4d62010-05-21 12:07:08 +1000102 INIT_LIST_HEAD(&ntp->t_busy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 ASSERT(tp->t_ticket != NULL);
Nathan Scottcfcbbbd2005-11-02 15:12:04 +1100106
Jan Karad9457dc2012-06-12 16:20:39 +0200107 ntp->t_flags = XFS_TRANS_PERM_LOG_RES |
108 (tp->t_flags & XFS_TRANS_RESERVE) |
Christoph Hellwig253f4912016-04-06 09:19:55 +1000109 (tp->t_flags & XFS_TRANS_NO_WRITECOUNT);
Jan Karad9457dc2012-06-12 16:20:39 +0200110 /* We gave our writer reference to the new transaction */
Christoph Hellwig253f4912016-04-06 09:19:55 +1000111 tp->t_flags |= XFS_TRANS_NO_WRITECOUNT;
Dave Chinnercc09c0d2008-11-17 17:37:10 +1100112 ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket);
Brian Foster3e78b9a2018-03-09 14:01:58 -0800113
114 ASSERT(tp->t_blk_res >= tp->t_blk_res_used);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
116 tp->t_blk_res = tp->t_blk_res_used;
Brian Foster3e78b9a2018-03-09 14:01:58 -0800117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
119 tp->t_rtx_res = tp->t_rtx_res_used;
Nathan Scott59c1b082006-06-09 14:59:13 +1000120 ntp->t_pflags = tp->t_pflags;
Brian Fosterf8f28352018-05-07 17:38:47 -0700121 ntp->t_agfl_dfops = tp->t_agfl_dfops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Christoph Hellwig7d095252009-06-08 15:33:32 +0200123 xfs_trans_dup_dqinfo(tp, ntp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125 atomic_inc(&tp->t_mountp->m_active_trans);
126 return ntp;
127}
128
129/*
130 * This is called to reserve free disk blocks and log space for the
131 * given transaction. This must be done before allocating any resources
132 * within the transaction.
133 *
134 * This will return ENOSPC if there are not enough blocks available.
135 * It will sleep waiting for available log space.
136 * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which
137 * is used by long running transactions. If any one of the reservations
138 * fails then they will all be backed out.
139 *
140 * This does not do quota reservations. That typically is done by the
141 * caller afterwards.
142 */
Christoph Hellwig253f4912016-04-06 09:19:55 +1000143static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144xfs_trans_reserve(
Jie Liu3d3c8b52013-08-12 20:49:59 +1000145 struct xfs_trans *tp,
146 struct xfs_trans_res *resp,
147 uint blocks,
148 uint rtextents)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Nathan Scott59c1b082006-06-09 14:59:13 +1000150 int error = 0;
Dave Chinner0d485ad2015-02-23 21:22:03 +1100151 bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 /* Mark this thread as being in a transaction */
Michal Hocko90707332017-05-03 14:53:12 -0700154 current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 /*
157 * Attempt to reserve the needed disk blocks by decrementing
158 * the number needed from the number available. This will
159 * fail if the count would go below zero.
160 */
161 if (blocks > 0) {
Dave Chinner0d485ad2015-02-23 21:22:03 +1100162 error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (error != 0) {
Michal Hocko90707332017-05-03 14:53:12 -0700164 current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Dave Chinner24513372014-06-25 14:58:08 +1000165 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 }
167 tp->t_blk_res += blocks;
168 }
169
170 /*
171 * Reserve the log space needed for this transaction.
172 */
Jie Liu3d3c8b52013-08-12 20:49:59 +1000173 if (resp->tr_logres > 0) {
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000174 bool permanent = false;
175
Jie Liu3d3c8b52013-08-12 20:49:59 +1000176 ASSERT(tp->t_log_res == 0 ||
177 tp->t_log_res == resp->tr_logres);
178 ASSERT(tp->t_log_count == 0 ||
179 tp->t_log_count == resp->tr_logcount);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000180
Jie Liu3d3c8b52013-08-12 20:49:59 +1000181 if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 tp->t_flags |= XFS_TRANS_PERM_LOG_RES;
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000183 permanent = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 } else {
185 ASSERT(tp->t_ticket == NULL);
186 ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 }
188
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000189 if (tp->t_ticket != NULL) {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000190 ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES);
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000191 error = xfs_log_regrant(tp->t_mountp, tp->t_ticket);
192 } else {
Jie Liu3d3c8b52013-08-12 20:49:59 +1000193 error = xfs_log_reserve(tp->t_mountp,
194 resp->tr_logres,
195 resp->tr_logcount,
196 &tp->t_ticket, XFS_TRANSACTION,
Christoph Hellwig710b1e22016-04-06 09:20:36 +1000197 permanent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 }
Christoph Hellwig9006fb92012-02-20 02:31:31 +0000199
200 if (error)
201 goto undo_blocks;
202
Jie Liu3d3c8b52013-08-12 20:49:59 +1000203 tp->t_log_res = resp->tr_logres;
204 tp->t_log_count = resp->tr_logcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 }
206
207 /*
208 * Attempt to reserve the needed realtime extents by decrementing
209 * the number needed from the number available. This will
210 * fail if the count would go below zero.
211 */
212 if (rtextents > 0) {
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100213 error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 if (error) {
Dave Chinner24513372014-06-25 14:58:08 +1000215 error = -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 goto undo_log;
217 }
218 tp->t_rtx_res += rtextents;
219 }
220
221 return 0;
222
223 /*
224 * Error cases jump to one of these labels to undo any
225 * reservations which have already been performed.
226 */
227undo_log:
Jie Liu3d3c8b52013-08-12 20:49:59 +1000228 if (resp->tr_logres > 0) {
Christoph Hellwigf78c3902015-06-04 13:48:20 +1000229 xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 tp->t_ticket = NULL;
231 tp->t_log_res = 0;
232 tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES;
233 }
234
235undo_blocks:
236 if (blocks > 0) {
Eryu Guana27f6ef2016-09-14 07:39:07 +1000237 xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 tp->t_blk_res = 0;
239 }
240
Michal Hocko90707332017-05-03 14:53:12 -0700241 current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Nathan Scott59c1b082006-06-09 14:59:13 +1000243 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
Christoph Hellwig253f4912016-04-06 09:19:55 +1000246int
247xfs_trans_alloc(
248 struct xfs_mount *mp,
249 struct xfs_trans_res *resp,
250 uint blocks,
251 uint rtextents,
252 uint flags,
253 struct xfs_trans **tpp)
254{
255 struct xfs_trans *tp;
256 int error;
257
258 if (!(flags & XFS_TRANS_NO_WRITECOUNT))
259 sb_start_intwrite(mp->m_super);
260
261 WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE);
262 atomic_inc(&mp->m_active_trans);
263
264 tp = kmem_zone_zalloc(xfs_trans_zone,
265 (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP);
266 tp->t_magic = XFS_TRANS_HEADER_MAGIC;
267 tp->t_flags = flags;
268 tp->t_mountp = mp;
269 INIT_LIST_HEAD(&tp->t_items);
270 INIT_LIST_HEAD(&tp->t_busy);
271
272 error = xfs_trans_reserve(tp, resp, blocks, rtextents);
273 if (error) {
274 xfs_trans_cancel(tp);
275 return error;
276 }
277
Dave Chinnerba187812018-05-09 07:47:57 -0700278 trace_xfs_trans_alloc(tp, _RET_IP_);
279
Christoph Hellwig253f4912016-04-06 09:19:55 +1000280 *tpp = tp;
281 return 0;
282}
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284/*
Darrick J. Wonge89c0412017-03-28 14:56:37 -0700285 * Create an empty transaction with no reservation. This is a defensive
286 * mechanism for routines that query metadata without actually modifying
287 * them -- if the metadata being queried is somehow cross-linked (think a
288 * btree block pointer that points higher in the tree), we risk deadlock.
289 * However, blocks grabbed as part of a transaction can be re-grabbed.
290 * The verifiers will notice the corrupt block and the operation will fail
291 * back to userspace without deadlocking.
292 *
293 * Note the zero-length reservation; this transaction MUST be cancelled
294 * without any dirty data.
295 */
296int
297xfs_trans_alloc_empty(
298 struct xfs_mount *mp,
299 struct xfs_trans **tpp)
300{
301 struct xfs_trans_res resv = {0};
302
303 return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp);
304}
305
306/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 * Record the indicated change to the given field for application
308 * to the file system's superblock when the transaction commits.
309 * For now, just store the change in the transaction structure.
310 *
311 * Mark the transaction structure to indicate that the superblock
312 * needs to be updated before committing.
David Chinner92821e22007-05-24 15:26:31 +1000313 *
314 * Because we may not be keeping track of allocated/free inodes and
315 * used filesystem blocks in the superblock, we do not mark the
316 * superblock dirty in this transaction if we modify these fields.
317 * We still need to update the transaction deltas so that they get
318 * applied to the incore superblock, but we don't want them to
319 * cause the superblock to get locked and logged if these are the
320 * only fields in the superblock that the transaction modifies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 */
322void
323xfs_trans_mod_sb(
324 xfs_trans_t *tp,
325 uint field,
David Chinner20f4ebf2007-02-10 18:36:10 +1100326 int64_t delta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
David Chinner92821e22007-05-24 15:26:31 +1000328 uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
329 xfs_mount_t *mp = tp->t_mountp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
331 switch (field) {
332 case XFS_TRANS_SB_ICOUNT:
333 tp->t_icount_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000334 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
335 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 break;
337 case XFS_TRANS_SB_IFREE:
338 tp->t_ifree_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_FDBLOCKS:
343 /*
Brian Foster3e78b9a2018-03-09 14:01:58 -0800344 * Track the number of blocks allocated in the transaction.
345 * Make sure it does not exceed the number reserved. If so,
346 * shutdown as this can lead to accounting inconsistency.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 */
348 if (delta < 0) {
349 tp->t_blk_res_used += (uint)-delta;
Brian Foster3e78b9a2018-03-09 14:01:58 -0800350 if (tp->t_blk_res_used > tp->t_blk_res)
351 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 }
353 tp->t_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000354 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
355 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 break;
357 case XFS_TRANS_SB_RES_FDBLOCKS:
358 /*
359 * The allocation has already been applied to the
360 * in-core superblock's counter. This should only
361 * be applied to the on-disk superblock.
362 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 tp->t_res_fdblocks_delta += delta;
David Chinner92821e22007-05-24 15:26:31 +1000364 if (xfs_sb_version_haslazysbcount(&mp->m_sb))
365 flags &= ~XFS_TRANS_SB_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 break;
367 case XFS_TRANS_SB_FREXTENTS:
368 /*
369 * Track the number of blocks allocated in the
370 * transaction. Make sure it does not exceed the
371 * number reserved.
372 */
373 if (delta < 0) {
374 tp->t_rtx_res_used += (uint)-delta;
375 ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res);
376 }
377 tp->t_frextents_delta += delta;
378 break;
379 case XFS_TRANS_SB_RES_FREXTENTS:
380 /*
381 * The allocation has already been applied to the
Nathan Scottc41564b2006-03-29 08:55:14 +1000382 * in-core superblock's counter. This should only
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 * be applied to the on-disk superblock.
384 */
385 ASSERT(delta < 0);
386 tp->t_res_frextents_delta += delta;
387 break;
388 case XFS_TRANS_SB_DBLOCKS:
389 ASSERT(delta > 0);
390 tp->t_dblocks_delta += delta;
391 break;
392 case XFS_TRANS_SB_AGCOUNT:
393 ASSERT(delta > 0);
394 tp->t_agcount_delta += delta;
395 break;
396 case XFS_TRANS_SB_IMAXPCT:
397 tp->t_imaxpct_delta += delta;
398 break;
399 case XFS_TRANS_SB_REXTSIZE:
400 tp->t_rextsize_delta += delta;
401 break;
402 case XFS_TRANS_SB_RBMBLOCKS:
403 tp->t_rbmblocks_delta += delta;
404 break;
405 case XFS_TRANS_SB_RBLOCKS:
406 tp->t_rblocks_delta += delta;
407 break;
408 case XFS_TRANS_SB_REXTENTS:
409 tp->t_rextents_delta += delta;
410 break;
411 case XFS_TRANS_SB_REXTSLOG:
412 tp->t_rextslog_delta += delta;
413 break;
414 default:
415 ASSERT(0);
416 return;
417 }
418
David Chinner210c6f12007-05-24 15:26:51 +1000419 tp->t_flags |= flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420}
421
422/*
423 * xfs_trans_apply_sb_deltas() is called from the commit code
424 * to bring the superblock buffer into the current transaction
425 * and modify it as requested by earlier calls to xfs_trans_mod_sb().
426 *
427 * For now we just look at each field allowed to change and change
428 * it if necessary.
429 */
430STATIC void
431xfs_trans_apply_sb_deltas(
432 xfs_trans_t *tp)
433{
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000434 xfs_dsb_t *sbp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 xfs_buf_t *bp;
436 int whole = 0;
437
438 bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
439 sbp = XFS_BUF_TO_SBP(bp);
440
441 /*
442 * Check that superblock mods match the mods made to AGF counters.
443 */
444 ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) ==
445 (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
446 tp->t_ag_btree_delta));
447
David Chinner92821e22007-05-24 15:26:31 +1000448 /*
449 * Only update the superblock counters if we are logging them
450 */
451 if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000452 if (tp->t_icount_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800453 be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000454 if (tp->t_ifree_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800455 be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000456 if (tp->t_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800457 be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000458 if (tp->t_res_fdblocks_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800459 be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 }
461
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000462 if (tp->t_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800463 be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000464 if (tp->t_res_frextents_delta)
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800465 be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta);
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000466
467 if (tp->t_dblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800468 be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 whole = 1;
470 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000471 if (tp->t_agcount_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800472 be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 whole = 1;
474 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000475 if (tp->t_imaxpct_delta) {
476 sbp->sb_imax_pct += tp->t_imaxpct_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 whole = 1;
478 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000479 if (tp->t_rextsize_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800480 be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 whole = 1;
482 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000483 if (tp->t_rbmblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800484 be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 whole = 1;
486 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000487 if (tp->t_rblocks_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800488 be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 whole = 1;
490 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000491 if (tp->t_rextents_delta) {
Marcin Slusarz413d57c2008-02-13 15:03:29 -0800492 be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 whole = 1;
494 }
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000495 if (tp->t_rextslog_delta) {
496 sbp->sb_rextslog += tp->t_rextslog_delta;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 whole = 1;
498 }
499
Dave Chinner3443a3b2015-01-22 09:30:23 +1100500 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if (whole)
502 /*
Nathan Scottc41564b2006-03-29 08:55:14 +1000503 * Log the whole thing, the fields are noncontiguous.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000505 xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 else
507 /*
508 * Since all the modifiable fields are contiguous, we
509 * can get away with this.
510 */
Christoph Hellwig2bdf7cd2007-08-28 13:58:06 +1000511 xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
512 offsetof(xfs_dsb_t, sb_frextents) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 sizeof(sbp->sb_frextents) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100516STATIC int
517xfs_sb_mod8(
518 uint8_t *field,
519 int8_t delta)
520{
521 int8_t counter = *field;
522
523 counter += delta;
524 if (counter < 0) {
525 ASSERT(0);
526 return -EINVAL;
527 }
528 *field = counter;
529 return 0;
530}
531
532STATIC int
533xfs_sb_mod32(
534 uint32_t *field,
535 int32_t delta)
536{
537 int32_t counter = *field;
538
539 counter += delta;
540 if (counter < 0) {
541 ASSERT(0);
542 return -EINVAL;
543 }
544 *field = counter;
545 return 0;
546}
547
548STATIC int
549xfs_sb_mod64(
550 uint64_t *field,
551 int64_t delta)
552{
553 int64_t counter = *field;
554
555 counter += delta;
556 if (counter < 0) {
557 ASSERT(0);
558 return -EINVAL;
559 }
560 *field = counter;
561 return 0;
562}
563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564/*
David Chinner45c34142007-06-18 16:49:44 +1000565 * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
566 * and apply superblock counter changes to the in-core superblock. The
567 * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
568 * applied to the in-core superblock. The idea is that that has already been
569 * done.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 *
David Chinner45c34142007-06-18 16:49:44 +1000571 * If we are not logging superblock counters, then the inode allocated/free and
572 * used block counts are not updated in the on disk superblock. In this case,
573 * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
574 * still need to update the incore superblock with the changes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 */
Dave Chinner71e330b2010-05-21 14:37:18 +1000576void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577xfs_trans_unreserve_and_mod_sb(
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100578 struct xfs_trans *tp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579{
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100580 struct xfs_mount *mp = tp->t_mountp;
581 bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
582 int64_t blkdelta = 0;
583 int64_t rtxdelta = 0;
584 int64_t idelta = 0;
585 int64_t ifreedelta = 0;
586 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Christoph Hellwig1b040712010-09-30 02:25:56 +0000588 /* calculate deltas */
David Chinner45c34142007-06-18 16:49:44 +1000589 if (tp->t_blk_res > 0)
590 blkdelta = tp->t_blk_res;
David Chinner45c34142007-06-18 16:49:44 +1000591 if ((tp->t_fdblocks_delta != 0) &&
592 (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
593 (tp->t_flags & XFS_TRANS_SB_DIRTY)))
594 blkdelta += tp->t_fdblocks_delta;
595
David Chinner45c34142007-06-18 16:49:44 +1000596 if (tp->t_rtx_res > 0)
597 rtxdelta = tp->t_rtx_res;
David Chinner45c34142007-06-18 16:49:44 +1000598 if ((tp->t_frextents_delta != 0) &&
599 (tp->t_flags & XFS_TRANS_SB_DIRTY))
600 rtxdelta += tp->t_frextents_delta;
601
Christoph Hellwig1b040712010-09-30 02:25:56 +0000602 if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
603 (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
604 idelta = tp->t_icount_delta;
605 ifreedelta = tp->t_ifree_delta;
606 }
607
608 /* apply the per-cpu counters */
609 if (blkdelta) {
Dave Chinner0d485ad2015-02-23 21:22:03 +1100610 error = xfs_mod_fdblocks(mp, blkdelta, rsvd);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000611 if (error)
612 goto out;
613 }
614
615 if (idelta) {
Dave Chinner501ab322015-02-23 21:19:28 +1100616 error = xfs_mod_icount(mp, idelta);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000617 if (error)
618 goto out_undo_fdblocks;
619 }
620
621 if (ifreedelta) {
Dave Chinnere88b64e2015-02-23 21:19:53 +1100622 error = xfs_mod_ifree(mp, ifreedelta);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000623 if (error)
624 goto out_undo_icount;
625 }
626
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100627 if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY))
628 return;
629
Christoph Hellwig1b040712010-09-30 02:25:56 +0000630 /* apply remaining deltas */
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100631 spin_lock(&mp->m_sb_lock);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100632 if (rtxdelta) {
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100633 error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100634 if (error)
635 goto out_undo_ifree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 }
637
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100638 if (tp->t_dblocks_delta != 0) {
639 error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000640 if (error)
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100641 goto out_undo_frextents;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100643 if (tp->t_agcount_delta != 0) {
644 error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta);
645 if (error)
646 goto out_undo_dblocks;
647 }
648 if (tp->t_imaxpct_delta != 0) {
649 error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta);
650 if (error)
651 goto out_undo_agcount;
652 }
653 if (tp->t_rextsize_delta != 0) {
654 error = xfs_sb_mod32(&mp->m_sb.sb_rextsize,
655 tp->t_rextsize_delta);
656 if (error)
657 goto out_undo_imaxpct;
658 }
659 if (tp->t_rbmblocks_delta != 0) {
660 error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks,
661 tp->t_rbmblocks_delta);
662 if (error)
663 goto out_undo_rextsize;
664 }
665 if (tp->t_rblocks_delta != 0) {
666 error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta);
667 if (error)
668 goto out_undo_rbmblocks;
669 }
670 if (tp->t_rextents_delta != 0) {
671 error = xfs_sb_mod64(&mp->m_sb.sb_rextents,
672 tp->t_rextents_delta);
673 if (error)
674 goto out_undo_rblocks;
675 }
676 if (tp->t_rextslog_delta != 0) {
677 error = xfs_sb_mod8(&mp->m_sb.sb_rextslog,
678 tp->t_rextslog_delta);
679 if (error)
680 goto out_undo_rextents;
681 }
682 spin_unlock(&mp->m_sb_lock);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000683 return;
684
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100685out_undo_rextents:
686 if (tp->t_rextents_delta)
687 xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta);
688out_undo_rblocks:
689 if (tp->t_rblocks_delta)
690 xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta);
691out_undo_rbmblocks:
692 if (tp->t_rbmblocks_delta)
693 xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta);
694out_undo_rextsize:
695 if (tp->t_rextsize_delta)
696 xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta);
697out_undo_imaxpct:
698 if (tp->t_rextsize_delta)
699 xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta);
700out_undo_agcount:
701 if (tp->t_agcount_delta)
702 xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta);
703out_undo_dblocks:
704 if (tp->t_dblocks_delta)
705 xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100706out_undo_frextents:
707 if (rtxdelta)
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100708 xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta);
Dave Chinnerbab98bb2015-02-23 21:22:54 +1100709out_undo_ifree:
Dave Chinner0bd5dded2015-02-23 21:24:11 +1100710 spin_unlock(&mp->m_sb_lock);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000711 if (ifreedelta)
Dave Chinnere88b64e2015-02-23 21:19:53 +1100712 xfs_mod_ifree(mp, -ifreedelta);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000713out_undo_icount:
714 if (idelta)
Dave Chinner501ab322015-02-23 21:19:28 +1100715 xfs_mod_icount(mp, -idelta);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000716out_undo_fdblocks:
717 if (blkdelta)
Dave Chinner0d485ad2015-02-23 21:22:03 +1100718 xfs_mod_fdblocks(mp, -blkdelta, rsvd);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000719out:
Jesper Juhl1884bd82010-12-25 20:14:53 +0000720 ASSERT(error == 0);
Christoph Hellwig1b040712010-09-30 02:25:56 +0000721 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722}
723
Dave Chinnere6631f82018-05-09 07:49:37 -0700724/* Add the given log item to the transaction's list of log items. */
Christoph Hellwige98c4142010-06-23 18:11:15 +1000725void
726xfs_trans_add_item(
727 struct xfs_trans *tp,
728 struct xfs_log_item *lip)
729{
Jesper Juhlf65020a2012-02-13 20:51:05 +0000730 ASSERT(lip->li_mountp == tp->t_mountp);
731 ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
Dave Chinnere6631f82018-05-09 07:49:37 -0700732 ASSERT(list_empty(&lip->li_trans));
733 ASSERT(!test_bit(XFS_LI_DIRTY, &lip->li_flags));
Christoph Hellwige98c4142010-06-23 18:11:15 +1000734
Dave Chinnere6631f82018-05-09 07:49:37 -0700735 list_add_tail(&lip->li_trans, &tp->t_items);
Dave Chinnerba187812018-05-09 07:47:57 -0700736 trace_xfs_trans_add_item(tp, _RET_IP_);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000737}
738
Christoph Hellwige98c4142010-06-23 18:11:15 +1000739/*
Dave Chinnere6631f82018-05-09 07:49:37 -0700740 * Unlink the log item from the transaction. the log item is no longer
741 * considered dirty in this transaction, as the linked transaction has
742 * finished, either by abort or commit completion.
Christoph Hellwige98c4142010-06-23 18:11:15 +1000743 */
744void
745xfs_trans_del_item(
746 struct xfs_log_item *lip)
747{
Dave Chinnere6631f82018-05-09 07:49:37 -0700748 clear_bit(XFS_LI_DIRTY, &lip->li_flags);
749 list_del_init(&lip->li_trans);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000750}
751
Dave Chinnere6631f82018-05-09 07:49:37 -0700752/* Detach and unlock all of the items in a transaction */
Dave Chinnerd17c7012010-08-24 11:42:52 +1000753void
Christoph Hellwige98c4142010-06-23 18:11:15 +1000754xfs_trans_free_items(
755 struct xfs_trans *tp,
756 xfs_lsn_t commit_lsn,
Christoph Hellwigeacb24e2015-06-04 13:47:43 +1000757 bool abort)
Christoph Hellwige98c4142010-06-23 18:11:15 +1000758{
Dave Chinnere6631f82018-05-09 07:49:37 -0700759 struct xfs_log_item *lip, *next;
Christoph Hellwige98c4142010-06-23 18:11:15 +1000760
Dave Chinnerba187812018-05-09 07:47:57 -0700761 trace_xfs_trans_free_items(tp, _RET_IP_);
762
Dave Chinnere6631f82018-05-09 07:49:37 -0700763 list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) {
764 xfs_trans_del_item(lip);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000765 if (commit_lsn != NULLCOMMITLSN)
Dave Chinner904c17e2013-08-28 21:12:03 +1000766 lip->li_ops->iop_committing(lip, commit_lsn);
Christoph Hellwigeacb24e2015-06-04 13:47:43 +1000767 if (abort)
Dave Chinner22525c12018-05-09 07:47:34 -0700768 set_bit(XFS_LI_ABORTED, &lip->li_flags);
Dave Chinner904c17e2013-08-28 21:12:03 +1000769 lip->li_ops->iop_unlock(lip);
Christoph Hellwige98c4142010-06-23 18:11:15 +1000770 }
771}
772
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100773static inline void
774xfs_log_item_batch_insert(
775 struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000776 struct xfs_ail_cursor *cur,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100777 struct xfs_log_item **log_items,
778 int nr_items,
779 xfs_lsn_t commit_lsn)
780{
781 int i;
782
Matthew Wilcox57e80952018-03-07 14:59:39 -0800783 spin_lock(&ailp->ail_lock);
784 /* xfs_trans_ail_update_bulk drops ailp->ail_lock */
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000785 xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100786
Dave Chinner904c17e2013-08-28 21:12:03 +1000787 for (i = 0; i < nr_items; i++) {
788 struct xfs_log_item *lip = log_items[i];
789
790 lip->li_ops->iop_unpin(lip, 0);
791 }
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100792}
793
794/*
795 * Bulk operation version of xfs_trans_committed that takes a log vector of
796 * items to insert into the AIL. This uses bulk AIL insertion techniques to
797 * minimise lock traffic.
Dave Chinnere34a3142011-01-27 12:13:35 +1100798 *
799 * If we are called with the aborted flag set, it is because a log write during
800 * a CIL checkpoint commit has failed. In this case, all the items in the
Dave Chinner904c17e2013-08-28 21:12:03 +1000801 * checkpoint have already gone through iop_commited and iop_unlock, which
Dave Chinnere34a3142011-01-27 12:13:35 +1100802 * means that checkpoint commit abort handling is treated exactly the same
803 * as an iclog write error even though we haven't started any IO yet. Hence in
Dave Chinner904c17e2013-08-28 21:12:03 +1000804 * this case all we need to do is iop_committed processing, followed by an
805 * iop_unpin(aborted) call.
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000806 *
807 * The AIL cursor is used to optimise the insert process. If commit_lsn is not
808 * at the end of the AIL, the insert cursor avoids the need to walk
809 * the AIL to find the insertion point on every xfs_log_item_batch_insert()
810 * call. This saves a lot of needless list walking and is a net win, even
811 * though it slightly increases that amount of AIL lock traffic to set it up
812 * and tear it down.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100813 */
814void
815xfs_trans_committed_bulk(
816 struct xfs_ail *ailp,
817 struct xfs_log_vec *log_vector,
818 xfs_lsn_t commit_lsn,
819 int aborted)
820{
821#define LOG_ITEM_BATCH_SIZE 32
822 struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE];
823 struct xfs_log_vec *lv;
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000824 struct xfs_ail_cursor cur;
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100825 int i = 0;
826
Matthew Wilcox57e80952018-03-07 14:59:39 -0800827 spin_lock(&ailp->ail_lock);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000828 xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn);
Matthew Wilcox57e80952018-03-07 14:59:39 -0800829 spin_unlock(&ailp->ail_lock);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000830
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100831 /* unpin all the log items */
832 for (lv = log_vector; lv; lv = lv->lv_next ) {
833 struct xfs_log_item *lip = lv->lv_item;
834 xfs_lsn_t item_lsn;
835
836 if (aborted)
Dave Chinner22525c12018-05-09 07:47:34 -0700837 set_bit(XFS_LI_ABORTED, &lip->li_flags);
Dave Chinner904c17e2013-08-28 21:12:03 +1000838 item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100839
Dave Chinner1316d4d2011-07-04 05:27:36 +0000840 /* item_lsn of -1 means the item needs no further processing */
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100841 if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
842 continue;
843
Dave Chinnere34a3142011-01-27 12:13:35 +1100844 /*
845 * if we are aborting the operation, no point in inserting the
846 * object into the AIL as we are in a shutdown situation.
847 */
848 if (aborted) {
Matthew Wilcox57e80952018-03-07 14:59:39 -0800849 ASSERT(XFS_FORCED_SHUTDOWN(ailp->ail_mount));
Dave Chinner904c17e2013-08-28 21:12:03 +1000850 lip->li_ops->iop_unpin(lip, 1);
Dave Chinnere34a3142011-01-27 12:13:35 +1100851 continue;
852 }
853
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100854 if (item_lsn != commit_lsn) {
855
856 /*
857 * Not a bulk update option due to unusual item_lsn.
858 * Push into AIL immediately, rechecking the lsn once
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000859 * we have the ail lock. Then unpin the item. This does
860 * not affect the AIL cursor the bulk insert path is
861 * using.
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100862 */
Matthew Wilcox57e80952018-03-07 14:59:39 -0800863 spin_lock(&ailp->ail_lock);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100864 if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0)
865 xfs_trans_ail_update(ailp, lip, item_lsn);
866 else
Matthew Wilcox57e80952018-03-07 14:59:39 -0800867 spin_unlock(&ailp->ail_lock);
Dave Chinner904c17e2013-08-28 21:12:03 +1000868 lip->li_ops->iop_unpin(lip, 0);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100869 continue;
870 }
871
872 /* Item is a candidate for bulk AIL insert. */
873 log_items[i++] = lv->lv_item;
874 if (i >= LOG_ITEM_BATCH_SIZE) {
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000875 xfs_log_item_batch_insert(ailp, &cur, log_items,
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100876 LOG_ITEM_BATCH_SIZE, commit_lsn);
877 i = 0;
878 }
879 }
880
881 /* make sure we insert the remainder! */
882 if (i)
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000883 xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn);
884
Matthew Wilcox57e80952018-03-07 14:59:39 -0800885 spin_lock(&ailp->ail_lock);
Eric Sandeene4a1e292014-04-14 19:06:05 +1000886 xfs_trans_ail_cursor_done(&cur);
Matthew Wilcox57e80952018-03-07 14:59:39 -0800887 spin_unlock(&ailp->ail_lock);
Dave Chinner0e57f6a2010-12-20 12:02:19 +1100888}
889
Dave Chinnerb1c1b5b2010-03-23 10:11:05 +1100890/*
Christoph Hellwigb1037052011-09-19 14:55:51 +0000891 * Commit the given transaction to the log.
Dave Chinner09243782010-03-08 11:28:28 +1100892 *
893 * XFS disk error handling mechanism is not based on a typical
894 * transaction abort mechanism. Logically after the filesystem
895 * gets marked 'SHUTDOWN', we can't let any new transactions
896 * be durable - ie. committed to disk - because some metadata might
897 * be inconsistent. In such cases, this returns an error, and the
898 * caller may assume that all locked objects joined to the transaction
899 * have already been unlocked as if the commit had succeeded.
900 * Do not reference the transaction structure after this call.
901 */
Christoph Hellwig70393312015-06-04 13:48:08 +1000902static int
903__xfs_trans_commit(
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100904 struct xfs_trans *tp,
Christoph Hellwig70393312015-06-04 13:48:08 +1000905 bool regrant)
Dave Chinner09243782010-03-08 11:28:28 +1100906{
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100907 struct xfs_mount *mp = tp->t_mountp;
Dave Chinner09243782010-03-08 11:28:28 +1100908 xfs_lsn_t commit_lsn = -1;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100909 int error = 0;
Dave Chinner09243782010-03-08 11:28:28 +1100910 int sync = tp->t_flags & XFS_TRANS_SYNC;
Dave Chinner09243782010-03-08 11:28:28 +1100911
Brian Fosterf8f28352018-05-07 17:38:47 -0700912 ASSERT(!tp->t_agfl_dfops ||
913 !xfs_defer_has_unfinished_work(tp->t_agfl_dfops) || regrant);
914
Dave Chinnerba187812018-05-09 07:47:57 -0700915 trace_xfs_trans_commit(tp, _RET_IP_);
916
Dave Chinner09243782010-03-08 11:28:28 +1100917 /*
Dave Chinner09243782010-03-08 11:28:28 +1100918 * If there is nothing to be logged by the transaction,
919 * then unlock all of the items associated with the
920 * transaction and free the transaction structure.
921 * Also make sure to return any reserved blocks to
922 * the free pool.
923 */
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100924 if (!(tp->t_flags & XFS_TRANS_DIRTY))
925 goto out_unreserve;
926
927 if (XFS_FORCED_SHUTDOWN(mp)) {
Dave Chinner24513372014-06-25 14:58:08 +1000928 error = -EIO;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100929 goto out_unreserve;
Dave Chinner09243782010-03-08 11:28:28 +1100930 }
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100931
Dave Chinner09243782010-03-08 11:28:28 +1100932 ASSERT(tp->t_ticket != NULL);
933
934 /*
935 * If we need to update the superblock, then do it now.
936 */
937 if (tp->t_flags & XFS_TRANS_SB_DIRTY)
938 xfs_trans_apply_sb_deltas(tp);
939 xfs_trans_apply_dquot_deltas(tp);
940
Christoph Hellwig70393312015-06-04 13:48:08 +1000941 xfs_log_commit_cil(mp, tp, &commit_lsn, regrant);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Michal Hocko90707332017-05-03 14:53:12 -0700943 current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Christoph Hellwig0244b962011-12-06 21:58:08 +0000944 xfs_trans_free(tp);
945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 /*
947 * If the transaction needs to be synchronous, then force the
948 * log out now and wait for it.
949 */
950 if (sync) {
Christoph Hellwig656de4f2018-03-13 23:15:28 -0700951 error = xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100952 XFS_STATS_INC(mp, xs_trans_sync);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 } else {
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100954 XFS_STATS_INC(mp, xs_trans_async);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 }
956
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100957 return error;
958
959out_unreserve:
960 xfs_trans_unreserve_and_mod_sb(tp);
961
962 /*
963 * It is indeed possible for the transaction to be not dirty but
964 * the dqinfo portion to be. All that means is that we have some
965 * (non-persistent) quota reservations that need to be unreserved.
966 */
967 xfs_trans_unreserve_and_mod_dquots(tp);
968 if (tp->t_ticket) {
Christoph Hellwigf78c3902015-06-04 13:48:20 +1000969 commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100970 if (commit_lsn == -1 && !error)
Dave Chinner24513372014-06-25 14:58:08 +1000971 error = -EIO;
Dave Chinnerba187812018-05-09 07:47:57 -0700972 tp->t_ticket = NULL;
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100973 }
Michal Hocko90707332017-05-03 14:53:12 -0700974 current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Christoph Hellwigeacb24e2015-06-04 13:47:43 +1000975 xfs_trans_free_items(tp, NULLCOMMITLSN, !!error);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100976 xfs_trans_free(tp);
977
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100978 XFS_STATS_INC(mp, xs_trans_empty);
Christoph Hellwiga3ccd2c2010-03-15 12:52:49 +1100979 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980}
981
Christoph Hellwig70393312015-06-04 13:48:08 +1000982int
983xfs_trans_commit(
984 struct xfs_trans *tp)
985{
986 return __xfs_trans_commit(tp, false);
987}
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 * Unlock all of the transaction's items and free the transaction.
991 * The transaction must not have modified any of its items, because
992 * there is no way to restore them to their previous state.
993 *
994 * If the transaction has made a log reservation, make sure to release
995 * it as well.
996 */
997void
998xfs_trans_cancel(
Christoph Hellwig4906e212015-06-04 13:47:56 +1000999 struct xfs_trans *tp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000{
Christoph Hellwig4906e212015-06-04 13:47:56 +10001001 struct xfs_mount *mp = tp->t_mountp;
1002 bool dirty = (tp->t_flags & XFS_TRANS_DIRTY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
Dave Chinnerba187812018-05-09 07:47:57 -07001004 trace_xfs_trans_cancel(tp, _RET_IP_);
1005
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 * See if the caller is relying on us to shut down the
1008 * filesystem. This happens in paths where we detect
1009 * corruption and decide to give up.
1010 */
Christoph Hellwig4906e212015-06-04 13:47:56 +10001011 if (dirty && !XFS_FORCED_SHUTDOWN(mp)) {
Ryan Hankins0733af22006-01-11 15:36:44 +11001012 XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp);
Nathan Scott7d04a332006-06-09 14:58:38 +10001013 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Nathan Scott60a204f2006-01-11 15:37:00 +11001014 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015#ifdef DEBUG
Christoph Hellwig4906e212015-06-04 13:47:56 +10001016 if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) {
Dave Chinnere6631f82018-05-09 07:49:37 -07001017 struct xfs_log_item *lip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
Dave Chinnere6631f82018-05-09 07:49:37 -07001019 list_for_each_entry(lip, &tp->t_items, li_trans)
1020 ASSERT(!(lip->li_type == XFS_LI_EFD));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 }
1022#endif
1023 xfs_trans_unreserve_and_mod_sb(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +02001024 xfs_trans_unreserve_and_mod_dquots(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
Dave Chinnerba187812018-05-09 07:47:57 -07001026 if (tp->t_ticket) {
Christoph Hellwigf78c3902015-06-04 13:48:20 +10001027 xfs_log_done(mp, tp->t_ticket, NULL, false);
Dave Chinnerba187812018-05-09 07:47:57 -07001028 tp->t_ticket = NULL;
1029 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
1031 /* mark this thread as no longer being in a transaction */
Michal Hocko90707332017-05-03 14:53:12 -07001032 current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Christoph Hellwig4906e212015-06-04 13:47:56 +10001034 xfs_trans_free_items(tp, NULLCOMMITLSN, dirty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 xfs_trans_free(tp);
1036}
1037
Niv Sardi322ff6b2008-08-13 16:05:49 +10001038/*
1039 * Roll from one trans in the sequence of PERMANENT transactions to
1040 * the next: permanent transactions are only flushed out when
Christoph Hellwig70393312015-06-04 13:48:08 +10001041 * committed with xfs_trans_commit(), but we still want as soon
Niv Sardi322ff6b2008-08-13 16:05:49 +10001042 * as possible to let chunks of it go to the log. So we commit the
1043 * chunk we've been working on and get a new transaction to continue.
1044 */
1045int
Christoph Hellwig254133f2017-04-06 16:00:11 -07001046xfs_trans_roll(
Christoph Hellwig411350d2017-08-28 10:21:03 -07001047 struct xfs_trans **tpp)
Niv Sardi322ff6b2008-08-13 16:05:49 +10001048{
Christoph Hellwig411350d2017-08-28 10:21:03 -07001049 struct xfs_trans *trans = *tpp;
Jie Liu3d3c8b52013-08-12 20:49:59 +10001050 struct xfs_trans_res tres;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001051 int error;
1052
Dave Chinnerba187812018-05-09 07:47:57 -07001053 trace_xfs_trans_roll(trans, _RET_IP_);
1054
Niv Sardi322ff6b2008-08-13 16:05:49 +10001055 /*
Niv Sardi322ff6b2008-08-13 16:05:49 +10001056 * Copy the critical parameters from one trans to the next.
1057 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001058 tres.tr_logres = trans->t_log_res;
1059 tres.tr_logcount = trans->t_log_count;
Christoph Hellwig411350d2017-08-28 10:21:03 -07001060
Niv Sardi322ff6b2008-08-13 16:05:49 +10001061 *tpp = xfs_trans_dup(trans);
1062
1063 /*
1064 * Commit the current transaction.
1065 * If this commit failed, then it'd just unlock those items that
1066 * are not marked ihold. That also means that a filesystem shutdown
1067 * is in progress. The caller takes the responsibility to cancel
1068 * the duplicate transaction that gets returned.
1069 */
Christoph Hellwig70393312015-06-04 13:48:08 +10001070 error = __xfs_trans_commit(trans, true);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001071 if (error)
Eric Sandeend99831f2014-06-22 15:03:54 +10001072 return error;
Niv Sardi322ff6b2008-08-13 16:05:49 +10001073
Niv Sardi322ff6b2008-08-13 16:05:49 +10001074 /*
Christoph Hellwig411350d2017-08-28 10:21:03 -07001075 * Reserve space in the log for the next transaction.
Niv Sardi322ff6b2008-08-13 16:05:49 +10001076 * This also pushes items in the "AIL", the list of logged items,
1077 * out to disk if they are taking up space at the tail of the log
1078 * that we want to use. This requires that either nothing be locked
1079 * across this call, or that anything that is locked be logged in
1080 * the prior and the next transactions.
1081 */
Jie Liu3d3c8b52013-08-12 20:49:59 +10001082 tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
Christoph Hellwig411350d2017-08-28 10:21:03 -07001083 return xfs_trans_reserve(*tpp, &tres, 0, 0);
Niv Sardi322ff6b2008-08-13 16:05:49 +10001084}