Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
e98c414f | 3 | * Copyright (C) 2010 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
10 | * This program is distributed in the hope that it would be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
1da177e4 | 14 | * |
7b718769 NS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 18 | */ |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
70a9883c | 21 | #include "xfs_shared.h" |
239880ef DC |
22 | #include "xfs_format.h" |
23 | #include "xfs_log_format.h" | |
24 | #include "xfs_trans_resv.h" | |
1da177e4 | 25 | #include "xfs_mount.h" |
1da177e4 | 26 | #include "xfs_inode.h" |
efc27b52 | 27 | #include "xfs_extent_busy.h" |
1da177e4 | 28 | #include "xfs_quota.h" |
239880ef | 29 | #include "xfs_trans.h" |
a844f451 | 30 | #include "xfs_trans_priv.h" |
239880ef | 31 | #include "xfs_log.h" |
ed3b4d6c | 32 | #include "xfs_trace.h" |
a4fbe6ab | 33 | #include "xfs_error.h" |
1da177e4 | 34 | |
8f794055 | 35 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 36 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 37 | |
1da177e4 LT |
38 | /* |
39 | * Initialize the precomputed transaction reservation values | |
40 | * in the mount structure. | |
41 | */ | |
42 | void | |
43 | xfs_trans_init( | |
025101dc | 44 | struct xfs_mount *mp) |
1da177e4 | 45 | { |
3d3c8b52 | 46 | xfs_trans_resv_calc(mp, M_RES(mp)); |
1da177e4 LT |
47 | } |
48 | ||
b1c1b5b6 DC |
49 | /* |
50 | * Free the transaction structure. If there is more clean up | |
51 | * to do when the structure is freed, add it here. | |
52 | */ | |
53 | STATIC void | |
54 | xfs_trans_free( | |
ed3b4d6c | 55 | struct xfs_trans *tp) |
b1c1b5b6 | 56 | { |
4ecbfe63 DC |
57 | xfs_extent_busy_sort(&tp->t_busy); |
58 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 59 | |
b1c1b5b6 | 60 | atomic_dec(&tp->t_mountp->m_active_trans); |
253f4911 | 61 | if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT)) |
d9457dc0 | 62 | sb_end_intwrite(tp->t_mountp->m_super); |
b1c1b5b6 DC |
63 | xfs_trans_free_dqinfo(tp); |
64 | kmem_zone_free(xfs_trans_zone, tp); | |
65 | } | |
66 | ||
1da177e4 LT |
67 | /* |
68 | * This is called to create a new transaction which will share the | |
69 | * permanent log reservation of the given transaction. The remaining | |
70 | * unused block and rt extent reservations are also inherited. This | |
71 | * implies that the original transaction is no longer allowed to allocate | |
72 | * blocks. Locks and log items, however, are no inherited. They must | |
73 | * be added to the new transaction explicitly. | |
74 | */ | |
2e6db6c4 | 75 | STATIC xfs_trans_t * |
1da177e4 LT |
76 | xfs_trans_dup( |
77 | xfs_trans_t *tp) | |
78 | { | |
79 | xfs_trans_t *ntp; | |
80 | ||
81 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
82 | ||
83 | /* | |
84 | * Initialize the new transaction structure. | |
85 | */ | |
2a3c0acc | 86 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 | 87 | ntp->t_mountp = tp->t_mountp; |
e98c414f | 88 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 89 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
90 | |
91 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 92 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 93 | |
d9457dc0 JK |
94 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
95 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
253f4911 | 96 | (tp->t_flags & XFS_TRANS_NO_WRITECOUNT); |
d9457dc0 | 97 | /* We gave our writer reference to the new transaction */ |
253f4911 | 98 | tp->t_flags |= XFS_TRANS_NO_WRITECOUNT; |
cc09c0dc | 99 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
100 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
101 | tp->t_blk_res = tp->t_blk_res_used; | |
102 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
103 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 104 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 105 | |
7d095257 | 106 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
107 | |
108 | atomic_inc(&tp->t_mountp->m_active_trans); | |
109 | return ntp; | |
110 | } | |
111 | ||
112 | /* | |
113 | * This is called to reserve free disk blocks and log space for the | |
114 | * given transaction. This must be done before allocating any resources | |
115 | * within the transaction. | |
116 | * | |
117 | * This will return ENOSPC if there are not enough blocks available. | |
118 | * It will sleep waiting for available log space. | |
119 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
120 | * is used by long running transactions. If any one of the reservations | |
121 | * fails then they will all be backed out. | |
122 | * | |
123 | * This does not do quota reservations. That typically is done by the | |
124 | * caller afterwards. | |
125 | */ | |
253f4911 | 126 | static int |
1da177e4 | 127 | xfs_trans_reserve( |
3d3c8b52 JL |
128 | struct xfs_trans *tp, |
129 | struct xfs_trans_res *resp, | |
130 | uint blocks, | |
131 | uint rtextents) | |
1da177e4 | 132 | { |
59c1b082 | 133 | int error = 0; |
0d485ada | 134 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
1da177e4 LT |
135 | |
136 | /* Mark this thread as being in a transaction */ | |
9070733b | 137 | current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 LT |
138 | |
139 | /* | |
140 | * Attempt to reserve the needed disk blocks by decrementing | |
141 | * the number needed from the number available. This will | |
142 | * fail if the count would go below zero. | |
143 | */ | |
144 | if (blocks > 0) { | |
0d485ada | 145 | error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 | 146 | if (error != 0) { |
9070733b | 147 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
2451337d | 148 | return -ENOSPC; |
1da177e4 LT |
149 | } |
150 | tp->t_blk_res += blocks; | |
151 | } | |
152 | ||
153 | /* | |
154 | * Reserve the log space needed for this transaction. | |
155 | */ | |
3d3c8b52 | 156 | if (resp->tr_logres > 0) { |
9006fb91 CH |
157 | bool permanent = false; |
158 | ||
3d3c8b52 JL |
159 | ASSERT(tp->t_log_res == 0 || |
160 | tp->t_log_res == resp->tr_logres); | |
161 | ASSERT(tp->t_log_count == 0 || | |
162 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 163 | |
3d3c8b52 | 164 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 165 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 166 | permanent = true; |
1da177e4 LT |
167 | } else { |
168 | ASSERT(tp->t_ticket == NULL); | |
169 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
170 | } |
171 | ||
9006fb91 | 172 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 173 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
174 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
175 | } else { | |
3d3c8b52 JL |
176 | error = xfs_log_reserve(tp->t_mountp, |
177 | resp->tr_logres, | |
178 | resp->tr_logcount, | |
179 | &tp->t_ticket, XFS_TRANSACTION, | |
710b1e2c | 180 | permanent); |
1da177e4 | 181 | } |
9006fb91 CH |
182 | |
183 | if (error) | |
184 | goto undo_blocks; | |
185 | ||
3d3c8b52 JL |
186 | tp->t_log_res = resp->tr_logres; |
187 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
188 | } |
189 | ||
190 | /* | |
191 | * Attempt to reserve the needed realtime extents by decrementing | |
192 | * the number needed from the number available. This will | |
193 | * fail if the count would go below zero. | |
194 | */ | |
195 | if (rtextents > 0) { | |
bab98bbe | 196 | error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents)); |
1da177e4 | 197 | if (error) { |
2451337d | 198 | error = -ENOSPC; |
1da177e4 LT |
199 | goto undo_log; |
200 | } | |
201 | tp->t_rtx_res += rtextents; | |
202 | } | |
203 | ||
204 | return 0; | |
205 | ||
206 | /* | |
207 | * Error cases jump to one of these labels to undo any | |
208 | * reservations which have already been performed. | |
209 | */ | |
210 | undo_log: | |
3d3c8b52 | 211 | if (resp->tr_logres > 0) { |
f78c3901 | 212 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false); |
1da177e4 LT |
213 | tp->t_ticket = NULL; |
214 | tp->t_log_res = 0; | |
215 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
216 | } | |
217 | ||
218 | undo_blocks: | |
219 | if (blocks > 0) { | |
a27f6ef4 | 220 | xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd); |
1da177e4 LT |
221 | tp->t_blk_res = 0; |
222 | } | |
223 | ||
9070733b | 224 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 225 | |
59c1b082 | 226 | return error; |
1da177e4 LT |
227 | } |
228 | ||
253f4911 CH |
229 | int |
230 | xfs_trans_alloc( | |
231 | struct xfs_mount *mp, | |
232 | struct xfs_trans_res *resp, | |
233 | uint blocks, | |
234 | uint rtextents, | |
235 | uint flags, | |
236 | struct xfs_trans **tpp) | |
237 | { | |
238 | struct xfs_trans *tp; | |
239 | int error; | |
240 | ||
241 | if (!(flags & XFS_TRANS_NO_WRITECOUNT)) | |
242 | sb_start_intwrite(mp->m_super); | |
243 | ||
244 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); | |
245 | atomic_inc(&mp->m_active_trans); | |
246 | ||
247 | tp = kmem_zone_zalloc(xfs_trans_zone, | |
248 | (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); | |
249 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; | |
250 | tp->t_flags = flags; | |
251 | tp->t_mountp = mp; | |
252 | INIT_LIST_HEAD(&tp->t_items); | |
253 | INIT_LIST_HEAD(&tp->t_busy); | |
254 | ||
255 | error = xfs_trans_reserve(tp, resp, blocks, rtextents); | |
256 | if (error) { | |
257 | xfs_trans_cancel(tp); | |
258 | return error; | |
259 | } | |
260 | ||
261 | *tpp = tp; | |
262 | return 0; | |
263 | } | |
264 | ||
1da177e4 LT |
265 | /* |
266 | * Record the indicated change to the given field for application | |
267 | * to the file system's superblock when the transaction commits. | |
268 | * For now, just store the change in the transaction structure. | |
269 | * | |
270 | * Mark the transaction structure to indicate that the superblock | |
271 | * needs to be updated before committing. | |
92821e2b DC |
272 | * |
273 | * Because we may not be keeping track of allocated/free inodes and | |
274 | * used filesystem blocks in the superblock, we do not mark the | |
275 | * superblock dirty in this transaction if we modify these fields. | |
276 | * We still need to update the transaction deltas so that they get | |
277 | * applied to the incore superblock, but we don't want them to | |
278 | * cause the superblock to get locked and logged if these are the | |
279 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
280 | */ |
281 | void | |
282 | xfs_trans_mod_sb( | |
283 | xfs_trans_t *tp, | |
284 | uint field, | |
20f4ebf2 | 285 | int64_t delta) |
1da177e4 | 286 | { |
92821e2b DC |
287 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
288 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
289 | |
290 | switch (field) { | |
291 | case XFS_TRANS_SB_ICOUNT: | |
292 | tp->t_icount_delta += delta; | |
92821e2b DC |
293 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
294 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
295 | break; |
296 | case XFS_TRANS_SB_IFREE: | |
297 | tp->t_ifree_delta += delta; | |
92821e2b DC |
298 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
299 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
300 | break; |
301 | case XFS_TRANS_SB_FDBLOCKS: | |
302 | /* | |
303 | * Track the number of blocks allocated in the | |
304 | * transaction. Make sure it does not exceed the | |
305 | * number reserved. | |
306 | */ | |
307 | if (delta < 0) { | |
308 | tp->t_blk_res_used += (uint)-delta; | |
309 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
310 | } | |
311 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
312 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
313 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
314 | break; |
315 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
316 | /* | |
317 | * The allocation has already been applied to the | |
318 | * in-core superblock's counter. This should only | |
319 | * be applied to the on-disk superblock. | |
320 | */ | |
1da177e4 | 321 | tp->t_res_fdblocks_delta += delta; |
92821e2b DC |
322 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
323 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
324 | break; |
325 | case XFS_TRANS_SB_FREXTENTS: | |
326 | /* | |
327 | * Track the number of blocks allocated in the | |
328 | * transaction. Make sure it does not exceed the | |
329 | * number reserved. | |
330 | */ | |
331 | if (delta < 0) { | |
332 | tp->t_rtx_res_used += (uint)-delta; | |
333 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
334 | } | |
335 | tp->t_frextents_delta += delta; | |
336 | break; | |
337 | case XFS_TRANS_SB_RES_FREXTENTS: | |
338 | /* | |
339 | * The allocation has already been applied to the | |
c41564b5 | 340 | * in-core superblock's counter. This should only |
1da177e4 LT |
341 | * be applied to the on-disk superblock. |
342 | */ | |
343 | ASSERT(delta < 0); | |
344 | tp->t_res_frextents_delta += delta; | |
345 | break; | |
346 | case XFS_TRANS_SB_DBLOCKS: | |
347 | ASSERT(delta > 0); | |
348 | tp->t_dblocks_delta += delta; | |
349 | break; | |
350 | case XFS_TRANS_SB_AGCOUNT: | |
351 | ASSERT(delta > 0); | |
352 | tp->t_agcount_delta += delta; | |
353 | break; | |
354 | case XFS_TRANS_SB_IMAXPCT: | |
355 | tp->t_imaxpct_delta += delta; | |
356 | break; | |
357 | case XFS_TRANS_SB_REXTSIZE: | |
358 | tp->t_rextsize_delta += delta; | |
359 | break; | |
360 | case XFS_TRANS_SB_RBMBLOCKS: | |
361 | tp->t_rbmblocks_delta += delta; | |
362 | break; | |
363 | case XFS_TRANS_SB_RBLOCKS: | |
364 | tp->t_rblocks_delta += delta; | |
365 | break; | |
366 | case XFS_TRANS_SB_REXTENTS: | |
367 | tp->t_rextents_delta += delta; | |
368 | break; | |
369 | case XFS_TRANS_SB_REXTSLOG: | |
370 | tp->t_rextslog_delta += delta; | |
371 | break; | |
372 | default: | |
373 | ASSERT(0); | |
374 | return; | |
375 | } | |
376 | ||
210c6f1c | 377 | tp->t_flags |= flags; |
1da177e4 LT |
378 | } |
379 | ||
380 | /* | |
381 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
382 | * to bring the superblock buffer into the current transaction | |
383 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
384 | * | |
385 | * For now we just look at each field allowed to change and change | |
386 | * it if necessary. | |
387 | */ | |
388 | STATIC void | |
389 | xfs_trans_apply_sb_deltas( | |
390 | xfs_trans_t *tp) | |
391 | { | |
2bdf7cd0 | 392 | xfs_dsb_t *sbp; |
1da177e4 LT |
393 | xfs_buf_t *bp; |
394 | int whole = 0; | |
395 | ||
396 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
397 | sbp = XFS_BUF_TO_SBP(bp); | |
398 | ||
399 | /* | |
400 | * Check that superblock mods match the mods made to AGF counters. | |
401 | */ | |
402 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
403 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
404 | tp->t_ag_btree_delta)); | |
405 | ||
92821e2b DC |
406 | /* |
407 | * Only update the superblock counters if we are logging them | |
408 | */ | |
409 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 410 | if (tp->t_icount_delta) |
413d57c9 | 411 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 412 | if (tp->t_ifree_delta) |
413d57c9 | 413 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 414 | if (tp->t_fdblocks_delta) |
413d57c9 | 415 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 416 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 417 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
418 | } |
419 | ||
2bdf7cd0 | 420 | if (tp->t_frextents_delta) |
413d57c9 | 421 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 422 | if (tp->t_res_frextents_delta) |
413d57c9 | 423 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
424 | |
425 | if (tp->t_dblocks_delta) { | |
413d57c9 | 426 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
427 | whole = 1; |
428 | } | |
2bdf7cd0 | 429 | if (tp->t_agcount_delta) { |
413d57c9 | 430 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
431 | whole = 1; |
432 | } | |
2bdf7cd0 CH |
433 | if (tp->t_imaxpct_delta) { |
434 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
435 | whole = 1; |
436 | } | |
2bdf7cd0 | 437 | if (tp->t_rextsize_delta) { |
413d57c9 | 438 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
439 | whole = 1; |
440 | } | |
2bdf7cd0 | 441 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 442 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
443 | whole = 1; |
444 | } | |
2bdf7cd0 | 445 | if (tp->t_rblocks_delta) { |
413d57c9 | 446 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
447 | whole = 1; |
448 | } | |
2bdf7cd0 | 449 | if (tp->t_rextents_delta) { |
413d57c9 | 450 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
451 | whole = 1; |
452 | } | |
2bdf7cd0 CH |
453 | if (tp->t_rextslog_delta) { |
454 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
455 | whole = 1; |
456 | } | |
457 | ||
3443a3bc | 458 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
459 | if (whole) |
460 | /* | |
c41564b5 | 461 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 462 | */ |
2bdf7cd0 | 463 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
464 | else |
465 | /* | |
466 | * Since all the modifiable fields are contiguous, we | |
467 | * can get away with this. | |
468 | */ | |
2bdf7cd0 CH |
469 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
470 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 471 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
472 | } |
473 | ||
0bd5dded DC |
474 | STATIC int |
475 | xfs_sb_mod8( | |
476 | uint8_t *field, | |
477 | int8_t delta) | |
478 | { | |
479 | int8_t counter = *field; | |
480 | ||
481 | counter += delta; | |
482 | if (counter < 0) { | |
483 | ASSERT(0); | |
484 | return -EINVAL; | |
485 | } | |
486 | *field = counter; | |
487 | return 0; | |
488 | } | |
489 | ||
490 | STATIC int | |
491 | xfs_sb_mod32( | |
492 | uint32_t *field, | |
493 | int32_t delta) | |
494 | { | |
495 | int32_t counter = *field; | |
496 | ||
497 | counter += delta; | |
498 | if (counter < 0) { | |
499 | ASSERT(0); | |
500 | return -EINVAL; | |
501 | } | |
502 | *field = counter; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | STATIC int | |
507 | xfs_sb_mod64( | |
508 | uint64_t *field, | |
509 | int64_t delta) | |
510 | { | |
511 | int64_t counter = *field; | |
512 | ||
513 | counter += delta; | |
514 | if (counter < 0) { | |
515 | ASSERT(0); | |
516 | return -EINVAL; | |
517 | } | |
518 | *field = counter; | |
519 | return 0; | |
520 | } | |
521 | ||
1da177e4 | 522 | /* |
45c34141 DC |
523 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
524 | * and apply superblock counter changes to the in-core superblock. The | |
525 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
526 | * applied to the in-core superblock. The idea is that that has already been | |
527 | * done. | |
1da177e4 | 528 | * |
45c34141 DC |
529 | * If we are not logging superblock counters, then the inode allocated/free and |
530 | * used block counts are not updated in the on disk superblock. In this case, | |
531 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
532 | * still need to update the incore superblock with the changes. | |
1da177e4 | 533 | */ |
71e330b5 | 534 | void |
1da177e4 | 535 | xfs_trans_unreserve_and_mod_sb( |
0bd5dded | 536 | struct xfs_trans *tp) |
1da177e4 | 537 | { |
0bd5dded DC |
538 | struct xfs_mount *mp = tp->t_mountp; |
539 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
540 | int64_t blkdelta = 0; | |
541 | int64_t rtxdelta = 0; | |
542 | int64_t idelta = 0; | |
543 | int64_t ifreedelta = 0; | |
544 | int error; | |
1da177e4 | 545 | |
1b040712 | 546 | /* calculate deltas */ |
45c34141 DC |
547 | if (tp->t_blk_res > 0) |
548 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
549 | if ((tp->t_fdblocks_delta != 0) && |
550 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
551 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
552 | blkdelta += tp->t_fdblocks_delta; | |
553 | ||
45c34141 DC |
554 | if (tp->t_rtx_res > 0) |
555 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
556 | if ((tp->t_frextents_delta != 0) && |
557 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
558 | rtxdelta += tp->t_frextents_delta; | |
559 | ||
1b040712 CH |
560 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
561 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
562 | idelta = tp->t_icount_delta; | |
563 | ifreedelta = tp->t_ifree_delta; | |
564 | } | |
565 | ||
566 | /* apply the per-cpu counters */ | |
567 | if (blkdelta) { | |
0d485ada | 568 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
569 | if (error) |
570 | goto out; | |
571 | } | |
572 | ||
573 | if (idelta) { | |
501ab323 | 574 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
575 | if (error) |
576 | goto out_undo_fdblocks; | |
577 | } | |
578 | ||
579 | if (ifreedelta) { | |
e88b64ea | 580 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
581 | if (error) |
582 | goto out_undo_icount; | |
583 | } | |
584 | ||
0bd5dded DC |
585 | if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY)) |
586 | return; | |
587 | ||
1b040712 | 588 | /* apply remaining deltas */ |
0bd5dded | 589 | spin_lock(&mp->m_sb_lock); |
bab98bbe | 590 | if (rtxdelta) { |
0bd5dded | 591 | error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta); |
bab98bbe DC |
592 | if (error) |
593 | goto out_undo_ifree; | |
1da177e4 LT |
594 | } |
595 | ||
0bd5dded DC |
596 | if (tp->t_dblocks_delta != 0) { |
597 | error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta); | |
1b040712 | 598 | if (error) |
bab98bbe | 599 | goto out_undo_frextents; |
1da177e4 | 600 | } |
0bd5dded DC |
601 | if (tp->t_agcount_delta != 0) { |
602 | error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta); | |
603 | if (error) | |
604 | goto out_undo_dblocks; | |
605 | } | |
606 | if (tp->t_imaxpct_delta != 0) { | |
607 | error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta); | |
608 | if (error) | |
609 | goto out_undo_agcount; | |
610 | } | |
611 | if (tp->t_rextsize_delta != 0) { | |
612 | error = xfs_sb_mod32(&mp->m_sb.sb_rextsize, | |
613 | tp->t_rextsize_delta); | |
614 | if (error) | |
615 | goto out_undo_imaxpct; | |
616 | } | |
617 | if (tp->t_rbmblocks_delta != 0) { | |
618 | error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, | |
619 | tp->t_rbmblocks_delta); | |
620 | if (error) | |
621 | goto out_undo_rextsize; | |
622 | } | |
623 | if (tp->t_rblocks_delta != 0) { | |
624 | error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta); | |
625 | if (error) | |
626 | goto out_undo_rbmblocks; | |
627 | } | |
628 | if (tp->t_rextents_delta != 0) { | |
629 | error = xfs_sb_mod64(&mp->m_sb.sb_rextents, | |
630 | tp->t_rextents_delta); | |
631 | if (error) | |
632 | goto out_undo_rblocks; | |
633 | } | |
634 | if (tp->t_rextslog_delta != 0) { | |
635 | error = xfs_sb_mod8(&mp->m_sb.sb_rextslog, | |
636 | tp->t_rextslog_delta); | |
637 | if (error) | |
638 | goto out_undo_rextents; | |
639 | } | |
640 | spin_unlock(&mp->m_sb_lock); | |
1b040712 CH |
641 | return; |
642 | ||
0bd5dded DC |
643 | out_undo_rextents: |
644 | if (tp->t_rextents_delta) | |
645 | xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta); | |
646 | out_undo_rblocks: | |
647 | if (tp->t_rblocks_delta) | |
648 | xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta); | |
649 | out_undo_rbmblocks: | |
650 | if (tp->t_rbmblocks_delta) | |
651 | xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta); | |
652 | out_undo_rextsize: | |
653 | if (tp->t_rextsize_delta) | |
654 | xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta); | |
655 | out_undo_imaxpct: | |
656 | if (tp->t_rextsize_delta) | |
657 | xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta); | |
658 | out_undo_agcount: | |
659 | if (tp->t_agcount_delta) | |
660 | xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta); | |
661 | out_undo_dblocks: | |
662 | if (tp->t_dblocks_delta) | |
663 | xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta); | |
bab98bbe DC |
664 | out_undo_frextents: |
665 | if (rtxdelta) | |
0bd5dded | 666 | xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta); |
bab98bbe | 667 | out_undo_ifree: |
0bd5dded | 668 | spin_unlock(&mp->m_sb_lock); |
1b040712 | 669 | if (ifreedelta) |
e88b64ea | 670 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
671 | out_undo_icount: |
672 | if (idelta) | |
501ab323 | 673 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
674 | out_undo_fdblocks: |
675 | if (blkdelta) | |
0d485ada | 676 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 677 | out: |
1884bd83 | 678 | ASSERT(error == 0); |
1b040712 | 679 | return; |
1da177e4 LT |
680 | } |
681 | ||
e98c414f CH |
682 | /* |
683 | * Add the given log item to the transaction's list of log items. | |
684 | * | |
685 | * The log item will now point to its new descriptor with its li_desc field. | |
686 | */ | |
687 | void | |
688 | xfs_trans_add_item( | |
689 | struct xfs_trans *tp, | |
690 | struct xfs_log_item *lip) | |
691 | { | |
692 | struct xfs_log_item_desc *lidp; | |
693 | ||
f65020a8 JJ |
694 | ASSERT(lip->li_mountp == tp->t_mountp); |
695 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 696 | |
43869706 | 697 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
698 | |
699 | lidp->lid_item = lip; | |
700 | lidp->lid_flags = 0; | |
e98c414f CH |
701 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
702 | ||
703 | lip->li_desc = lidp; | |
704 | } | |
705 | ||
706 | STATIC void | |
707 | xfs_trans_free_item_desc( | |
708 | struct xfs_log_item_desc *lidp) | |
709 | { | |
710 | list_del_init(&lidp->lid_trans); | |
711 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
712 | } | |
713 | ||
714 | /* | |
715 | * Unlink and free the given descriptor. | |
716 | */ | |
717 | void | |
718 | xfs_trans_del_item( | |
719 | struct xfs_log_item *lip) | |
720 | { | |
721 | xfs_trans_free_item_desc(lip->li_desc); | |
722 | lip->li_desc = NULL; | |
723 | } | |
724 | ||
725 | /* | |
726 | * Unlock all of the items of a transaction and free all the descriptors | |
727 | * of that transaction. | |
728 | */ | |
d17c701c | 729 | void |
e98c414f CH |
730 | xfs_trans_free_items( |
731 | struct xfs_trans *tp, | |
732 | xfs_lsn_t commit_lsn, | |
eacb24e7 | 733 | bool abort) |
e98c414f CH |
734 | { |
735 | struct xfs_log_item_desc *lidp, *next; | |
736 | ||
737 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
738 | struct xfs_log_item *lip = lidp->lid_item; | |
739 | ||
740 | lip->li_desc = NULL; | |
741 | ||
742 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 743 | lip->li_ops->iop_committing(lip, commit_lsn); |
eacb24e7 | 744 | if (abort) |
e98c414f | 745 | lip->li_flags |= XFS_LI_ABORTED; |
904c17e6 | 746 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
747 | |
748 | xfs_trans_free_item_desc(lidp); | |
749 | } | |
750 | } | |
751 | ||
0e57f6a3 DC |
752 | static inline void |
753 | xfs_log_item_batch_insert( | |
754 | struct xfs_ail *ailp, | |
1d8c95a3 | 755 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
756 | struct xfs_log_item **log_items, |
757 | int nr_items, | |
758 | xfs_lsn_t commit_lsn) | |
759 | { | |
760 | int i; | |
761 | ||
762 | spin_lock(&ailp->xa_lock); | |
763 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 764 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 765 | |
904c17e6 DC |
766 | for (i = 0; i < nr_items; i++) { |
767 | struct xfs_log_item *lip = log_items[i]; | |
768 | ||
769 | lip->li_ops->iop_unpin(lip, 0); | |
770 | } | |
0e57f6a3 DC |
771 | } |
772 | ||
773 | /* | |
774 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
775 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
776 | * minimise lock traffic. | |
e34a314c DC |
777 | * |
778 | * If we are called with the aborted flag set, it is because a log write during | |
779 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 780 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
781 | * means that checkpoint commit abort handling is treated exactly the same |
782 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
783 | * this case all we need to do is iop_committed processing, followed by an |
784 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
785 | * |
786 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
787 | * at the end of the AIL, the insert cursor avoids the need to walk | |
788 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
789 | * call. This saves a lot of needless list walking and is a net win, even | |
790 | * though it slightly increases that amount of AIL lock traffic to set it up | |
791 | * and tear it down. | |
0e57f6a3 DC |
792 | */ |
793 | void | |
794 | xfs_trans_committed_bulk( | |
795 | struct xfs_ail *ailp, | |
796 | struct xfs_log_vec *log_vector, | |
797 | xfs_lsn_t commit_lsn, | |
798 | int aborted) | |
799 | { | |
800 | #define LOG_ITEM_BATCH_SIZE 32 | |
801 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
802 | struct xfs_log_vec *lv; | |
1d8c95a3 | 803 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
804 | int i = 0; |
805 | ||
1d8c95a3 DC |
806 | spin_lock(&ailp->xa_lock); |
807 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
808 | spin_unlock(&ailp->xa_lock); | |
809 | ||
0e57f6a3 DC |
810 | /* unpin all the log items */ |
811 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
812 | struct xfs_log_item *lip = lv->lv_item; | |
813 | xfs_lsn_t item_lsn; | |
814 | ||
815 | if (aborted) | |
816 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 817 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 818 | |
1316d4da | 819 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
820 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
821 | continue; | |
822 | ||
e34a314c DC |
823 | /* |
824 | * if we are aborting the operation, no point in inserting the | |
825 | * object into the AIL as we are in a shutdown situation. | |
826 | */ | |
827 | if (aborted) { | |
828 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 829 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
830 | continue; |
831 | } | |
832 | ||
0e57f6a3 DC |
833 | if (item_lsn != commit_lsn) { |
834 | ||
835 | /* | |
836 | * Not a bulk update option due to unusual item_lsn. | |
837 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
838 | * we have the ail lock. Then unpin the item. This does |
839 | * not affect the AIL cursor the bulk insert path is | |
840 | * using. | |
0e57f6a3 DC |
841 | */ |
842 | spin_lock(&ailp->xa_lock); | |
843 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
844 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
845 | else | |
846 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 847 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
848 | continue; |
849 | } | |
850 | ||
851 | /* Item is a candidate for bulk AIL insert. */ | |
852 | log_items[i++] = lv->lv_item; | |
853 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 854 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
855 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
856 | i = 0; | |
857 | } | |
858 | } | |
859 | ||
860 | /* make sure we insert the remainder! */ | |
861 | if (i) | |
1d8c95a3 DC |
862 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
863 | ||
864 | spin_lock(&ailp->xa_lock); | |
e4a1e29c | 865 | xfs_trans_ail_cursor_done(&cur); |
1d8c95a3 | 866 | spin_unlock(&ailp->xa_lock); |
0e57f6a3 DC |
867 | } |
868 | ||
0924378a | 869 | /* |
b1037058 | 870 | * Commit the given transaction to the log. |
0924378a DC |
871 | * |
872 | * XFS disk error handling mechanism is not based on a typical | |
873 | * transaction abort mechanism. Logically after the filesystem | |
874 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
875 | * be durable - ie. committed to disk - because some metadata might | |
876 | * be inconsistent. In such cases, this returns an error, and the | |
877 | * caller may assume that all locked objects joined to the transaction | |
878 | * have already been unlocked as if the commit had succeeded. | |
879 | * Do not reference the transaction structure after this call. | |
880 | */ | |
70393313 CH |
881 | static int |
882 | __xfs_trans_commit( | |
a3ccd2ca | 883 | struct xfs_trans *tp, |
70393313 | 884 | bool regrant) |
0924378a | 885 | { |
a3ccd2ca | 886 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 887 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 888 | int error = 0; |
0924378a | 889 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
0924378a | 890 | |
0924378a DC |
891 | /* |
892 | * If there is nothing to be logged by the transaction, | |
893 | * then unlock all of the items associated with the | |
894 | * transaction and free the transaction structure. | |
895 | * Also make sure to return any reserved blocks to | |
896 | * the free pool. | |
897 | */ | |
a3ccd2ca CH |
898 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
899 | goto out_unreserve; | |
900 | ||
901 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 902 | error = -EIO; |
a3ccd2ca | 903 | goto out_unreserve; |
0924378a | 904 | } |
a3ccd2ca | 905 | |
0924378a DC |
906 | ASSERT(tp->t_ticket != NULL); |
907 | ||
908 | /* | |
909 | * If we need to update the superblock, then do it now. | |
910 | */ | |
911 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
912 | xfs_trans_apply_sb_deltas(tp); | |
913 | xfs_trans_apply_dquot_deltas(tp); | |
914 | ||
70393313 | 915 | xfs_log_commit_cil(mp, tp, &commit_lsn, regrant); |
1da177e4 | 916 | |
9070733b | 917 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
0244b960 CH |
918 | xfs_trans_free(tp); |
919 | ||
1da177e4 LT |
920 | /* |
921 | * If the transaction needs to be synchronous, then force the | |
922 | * log out now and wait for it. | |
923 | */ | |
924 | if (sync) { | |
c6f97264 | 925 | error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
ff6d6af2 | 926 | XFS_STATS_INC(mp, xs_trans_sync); |
1da177e4 | 927 | } else { |
ff6d6af2 | 928 | XFS_STATS_INC(mp, xs_trans_async); |
1da177e4 LT |
929 | } |
930 | ||
a3ccd2ca CH |
931 | return error; |
932 | ||
933 | out_unreserve: | |
934 | xfs_trans_unreserve_and_mod_sb(tp); | |
935 | ||
936 | /* | |
937 | * It is indeed possible for the transaction to be not dirty but | |
938 | * the dqinfo portion to be. All that means is that we have some | |
939 | * (non-persistent) quota reservations that need to be unreserved. | |
940 | */ | |
941 | xfs_trans_unreserve_and_mod_dquots(tp); | |
942 | if (tp->t_ticket) { | |
f78c3901 | 943 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant); |
a3ccd2ca | 944 | if (commit_lsn == -1 && !error) |
2451337d | 945 | error = -EIO; |
a3ccd2ca | 946 | } |
9070733b | 947 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
eacb24e7 | 948 | xfs_trans_free_items(tp, NULLCOMMITLSN, !!error); |
a3ccd2ca CH |
949 | xfs_trans_free(tp); |
950 | ||
ff6d6af2 | 951 | XFS_STATS_INC(mp, xs_trans_empty); |
a3ccd2ca | 952 | return error; |
1da177e4 LT |
953 | } |
954 | ||
70393313 CH |
955 | int |
956 | xfs_trans_commit( | |
957 | struct xfs_trans *tp) | |
958 | { | |
959 | return __xfs_trans_commit(tp, false); | |
960 | } | |
961 | ||
1da177e4 LT |
962 | /* |
963 | * Unlock all of the transaction's items and free the transaction. | |
964 | * The transaction must not have modified any of its items, because | |
965 | * there is no way to restore them to their previous state. | |
966 | * | |
967 | * If the transaction has made a log reservation, make sure to release | |
968 | * it as well. | |
969 | */ | |
970 | void | |
971 | xfs_trans_cancel( | |
4906e215 | 972 | struct xfs_trans *tp) |
1da177e4 | 973 | { |
4906e215 CH |
974 | struct xfs_mount *mp = tp->t_mountp; |
975 | bool dirty = (tp->t_flags & XFS_TRANS_DIRTY); | |
1da177e4 | 976 | |
1da177e4 LT |
977 | /* |
978 | * See if the caller is relying on us to shut down the | |
979 | * filesystem. This happens in paths where we detect | |
980 | * corruption and decide to give up. | |
981 | */ | |
4906e215 | 982 | if (dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 983 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 984 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 985 | } |
1da177e4 | 986 | #ifdef DEBUG |
4906e215 | 987 | if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
e98c414f CH |
988 | struct xfs_log_item_desc *lidp; |
989 | ||
990 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
991 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
992 | } |
993 | #endif | |
994 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 995 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 | 996 | |
f78c3901 CH |
997 | if (tp->t_ticket) |
998 | xfs_log_done(mp, tp->t_ticket, NULL, false); | |
1da177e4 LT |
999 | |
1000 | /* mark this thread as no longer being in a transaction */ | |
9070733b | 1001 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 1002 | |
4906e215 | 1003 | xfs_trans_free_items(tp, NULLCOMMITLSN, dirty); |
1da177e4 LT |
1004 | xfs_trans_free(tp); |
1005 | } | |
1006 | ||
322ff6b8 NS |
1007 | /* |
1008 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1009 | * the next: permanent transactions are only flushed out when | |
70393313 | 1010 | * committed with xfs_trans_commit(), but we still want as soon |
322ff6b8 NS |
1011 | * as possible to let chunks of it go to the log. So we commit the |
1012 | * chunk we've been working on and get a new transaction to continue. | |
1013 | */ | |
1014 | int | |
d43ac29b | 1015 | __xfs_trans_roll( |
322ff6b8 | 1016 | struct xfs_trans **tpp, |
d43ac29b BF |
1017 | struct xfs_inode *dp, |
1018 | int *committed) | |
322ff6b8 NS |
1019 | { |
1020 | struct xfs_trans *trans; | |
3d3c8b52 | 1021 | struct xfs_trans_res tres; |
322ff6b8 NS |
1022 | int error; |
1023 | ||
cc07eed8 ES |
1024 | *committed = 0; |
1025 | ||
322ff6b8 NS |
1026 | /* |
1027 | * Ensure that the inode is always logged. | |
1028 | */ | |
1029 | trans = *tpp; | |
2e6db6c4 CH |
1030 | if (dp) |
1031 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
322ff6b8 NS |
1032 | |
1033 | /* | |
1034 | * Copy the critical parameters from one trans to the next. | |
1035 | */ | |
3d3c8b52 JL |
1036 | tres.tr_logres = trans->t_log_res; |
1037 | tres.tr_logcount = trans->t_log_count; | |
322ff6b8 NS |
1038 | *tpp = xfs_trans_dup(trans); |
1039 | ||
1040 | /* | |
1041 | * Commit the current transaction. | |
1042 | * If this commit failed, then it'd just unlock those items that | |
1043 | * are not marked ihold. That also means that a filesystem shutdown | |
1044 | * is in progress. The caller takes the responsibility to cancel | |
1045 | * the duplicate transaction that gets returned. | |
1046 | */ | |
70393313 | 1047 | error = __xfs_trans_commit(trans, true); |
322ff6b8 | 1048 | if (error) |
d99831ff | 1049 | return error; |
322ff6b8 | 1050 | |
d43ac29b | 1051 | *committed = 1; |
322ff6b8 NS |
1052 | trans = *tpp; |
1053 | ||
1054 | /* | |
1055 | * Reserve space in the log for th next transaction. | |
1056 | * This also pushes items in the "AIL", the list of logged items, | |
1057 | * out to disk if they are taking up space at the tail of the log | |
1058 | * that we want to use. This requires that either nothing be locked | |
1059 | * across this call, or that anything that is locked be logged in | |
1060 | * the prior and the next transactions. | |
1061 | */ | |
3d3c8b52 JL |
1062 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
1063 | error = xfs_trans_reserve(trans, &tres, 0, 0); | |
322ff6b8 NS |
1064 | /* |
1065 | * Ensure that the inode is in the new transaction and locked. | |
1066 | */ | |
1067 | if (error) | |
1068 | return error; | |
1069 | ||
2e6db6c4 CH |
1070 | if (dp) |
1071 | xfs_trans_ijoin(trans, dp, 0); | |
322ff6b8 NS |
1072 | return 0; |
1073 | } | |
d43ac29b BF |
1074 | |
1075 | int | |
1076 | xfs_trans_roll( | |
1077 | struct xfs_trans **tpp, | |
1078 | struct xfs_inode *dp) | |
1079 | { | |
cc07eed8 | 1080 | int committed; |
d43ac29b BF |
1081 | return __xfs_trans_roll(tpp, dp, &committed); |
1082 | } |