Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
e98c414f | 3 | * Copyright (C) 2010 Red Hat, Inc. |
7b718769 | 4 | * All Rights Reserved. |
1da177e4 | 5 | * |
7b718769 NS |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
8 | * published by the Free Software Foundation. |
9 | * | |
7b718769 NS |
10 | * This program is distributed in the hope that it would be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
1da177e4 | 14 | * |
7b718769 NS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write the Free Software Foundation, | |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 18 | */ |
1da177e4 | 19 | #include "xfs.h" |
a844f451 | 20 | #include "xfs_fs.h" |
6ca1c906 | 21 | #include "xfs_format.h" |
70a9883c | 22 | #include "xfs_shared.h" |
1da177e4 LT |
23 | #include "xfs_log.h" |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_mount.h" |
28 | #include "xfs_error.h" | |
a844f451 | 29 | #include "xfs_da_btree.h" |
1da177e4 | 30 | #include "xfs_bmap_btree.h" |
a844f451 | 31 | #include "xfs_alloc_btree.h" |
1da177e4 | 32 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
33 | #include "xfs_dinode.h" |
34 | #include "xfs_inode.h" | |
a844f451 NS |
35 | #include "xfs_btree.h" |
36 | #include "xfs_ialloc.h" | |
37 | #include "xfs_alloc.h" | |
efc27b52 | 38 | #include "xfs_extent_busy.h" |
1da177e4 | 39 | #include "xfs_bmap.h" |
1da177e4 | 40 | #include "xfs_quota.h" |
4f3b5783 | 41 | #include "xfs_qm.h" |
a844f451 | 42 | #include "xfs_trans_priv.h" |
1da177e4 | 43 | #include "xfs_trans_space.h" |
322ff6b8 | 44 | #include "xfs_inode_item.h" |
4f3b5783 JL |
45 | #include "xfs_log_priv.h" |
46 | #include "xfs_buf_item.h" | |
ed3b4d6c | 47 | #include "xfs_trace.h" |
1da177e4 | 48 | |
8f794055 | 49 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 50 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 51 | |
1da177e4 LT |
52 | /* |
53 | * Initialize the precomputed transaction reservation values | |
54 | * in the mount structure. | |
55 | */ | |
56 | void | |
57 | xfs_trans_init( | |
025101dc | 58 | struct xfs_mount *mp) |
1da177e4 | 59 | { |
3d3c8b52 | 60 | xfs_trans_resv_calc(mp, M_RES(mp)); |
1da177e4 LT |
61 | } |
62 | ||
63 | /* | |
64 | * This routine is called to allocate a transaction structure. | |
65 | * The type parameter indicates the type of the transaction. These | |
66 | * are enumerated in xfs_trans.h. | |
b2ce3974 AE |
67 | * |
68 | * Dynamically allocate the transaction structure from the transaction | |
69 | * zone, initialize it, and return it to the caller. | |
1da177e4 | 70 | */ |
b2ce3974 AE |
71 | xfs_trans_t * |
72 | xfs_trans_alloc( | |
73 | xfs_mount_t *mp, | |
74 | uint type) | |
75 | { | |
d9457dc0 JK |
76 | xfs_trans_t *tp; |
77 | ||
78 | sb_start_intwrite(mp->m_super); | |
79 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); | |
80 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; | |
81 | return tp; | |
b2ce3974 AE |
82 | } |
83 | ||
84 | xfs_trans_t * | |
1da177e4 | 85 | _xfs_trans_alloc( |
b2ce3974 AE |
86 | xfs_mount_t *mp, |
87 | uint type, | |
77ba7877 | 88 | xfs_km_flags_t memflags) |
1da177e4 | 89 | { |
b2ce3974 | 90 | xfs_trans_t *tp; |
1da177e4 | 91 | |
d9457dc0 | 92 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
34327e13 | 93 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 94 | |
80641dc6 | 95 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
2a3c0acc | 96 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
97 | tp->t_type = type; |
98 | tp->t_mountp = mp; | |
e98c414f | 99 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 100 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 101 | return tp; |
1da177e4 LT |
102 | } |
103 | ||
b1c1b5b6 DC |
104 | /* |
105 | * Free the transaction structure. If there is more clean up | |
106 | * to do when the structure is freed, add it here. | |
107 | */ | |
108 | STATIC void | |
109 | xfs_trans_free( | |
ed3b4d6c | 110 | struct xfs_trans *tp) |
b1c1b5b6 | 111 | { |
4ecbfe63 DC |
112 | xfs_extent_busy_sort(&tp->t_busy); |
113 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 114 | |
b1c1b5b6 | 115 | atomic_dec(&tp->t_mountp->m_active_trans); |
d9457dc0 JK |
116 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
117 | sb_end_intwrite(tp->t_mountp->m_super); | |
b1c1b5b6 DC |
118 | xfs_trans_free_dqinfo(tp); |
119 | kmem_zone_free(xfs_trans_zone, tp); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * This is called to create a new transaction which will share the | |
124 | * permanent log reservation of the given transaction. The remaining | |
125 | * unused block and rt extent reservations are also inherited. This | |
126 | * implies that the original transaction is no longer allowed to allocate | |
127 | * blocks. Locks and log items, however, are no inherited. They must | |
128 | * be added to the new transaction explicitly. | |
129 | */ | |
130 | xfs_trans_t * | |
131 | xfs_trans_dup( | |
132 | xfs_trans_t *tp) | |
133 | { | |
134 | xfs_trans_t *ntp; | |
135 | ||
136 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
137 | ||
138 | /* | |
139 | * Initialize the new transaction structure. | |
140 | */ | |
2a3c0acc | 141 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
142 | ntp->t_type = tp->t_type; |
143 | ntp->t_mountp = tp->t_mountp; | |
e98c414f | 144 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 145 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
146 | |
147 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 148 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 149 | |
d9457dc0 JK |
150 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
151 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
152 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); | |
153 | /* We gave our writer reference to the new transaction */ | |
154 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; | |
cc09c0dc | 155 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
156 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
157 | tp->t_blk_res = tp->t_blk_res_used; | |
158 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
159 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 160 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 161 | |
7d095257 | 162 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
163 | |
164 | atomic_inc(&tp->t_mountp->m_active_trans); | |
165 | return ntp; | |
166 | } | |
167 | ||
168 | /* | |
169 | * This is called to reserve free disk blocks and log space for the | |
170 | * given transaction. This must be done before allocating any resources | |
171 | * within the transaction. | |
172 | * | |
173 | * This will return ENOSPC if there are not enough blocks available. | |
174 | * It will sleep waiting for available log space. | |
175 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
176 | * is used by long running transactions. If any one of the reservations | |
177 | * fails then they will all be backed out. | |
178 | * | |
179 | * This does not do quota reservations. That typically is done by the | |
180 | * caller afterwards. | |
181 | */ | |
182 | int | |
183 | xfs_trans_reserve( | |
3d3c8b52 JL |
184 | struct xfs_trans *tp, |
185 | struct xfs_trans_res *resp, | |
186 | uint blocks, | |
187 | uint rtextents) | |
1da177e4 | 188 | { |
59c1b082 NS |
189 | int error = 0; |
190 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
191 | |
192 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 193 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
194 | |
195 | /* | |
196 | * Attempt to reserve the needed disk blocks by decrementing | |
197 | * the number needed from the number available. This will | |
198 | * fail if the count would go below zero. | |
199 | */ | |
200 | if (blocks > 0) { | |
96540c78 | 201 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 202 | -((int64_t)blocks), rsvd); |
1da177e4 | 203 | if (error != 0) { |
59c1b082 | 204 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
205 | return (XFS_ERROR(ENOSPC)); |
206 | } | |
207 | tp->t_blk_res += blocks; | |
208 | } | |
209 | ||
210 | /* | |
211 | * Reserve the log space needed for this transaction. | |
212 | */ | |
3d3c8b52 | 213 | if (resp->tr_logres > 0) { |
9006fb91 CH |
214 | bool permanent = false; |
215 | ||
3d3c8b52 JL |
216 | ASSERT(tp->t_log_res == 0 || |
217 | tp->t_log_res == resp->tr_logres); | |
218 | ASSERT(tp->t_log_count == 0 || | |
219 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 220 | |
3d3c8b52 | 221 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 222 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 223 | permanent = true; |
1da177e4 LT |
224 | } else { |
225 | ASSERT(tp->t_ticket == NULL); | |
226 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
227 | } |
228 | ||
9006fb91 | 229 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 230 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
231 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
232 | } else { | |
3d3c8b52 JL |
233 | error = xfs_log_reserve(tp->t_mountp, |
234 | resp->tr_logres, | |
235 | resp->tr_logcount, | |
236 | &tp->t_ticket, XFS_TRANSACTION, | |
237 | permanent, tp->t_type); | |
1da177e4 | 238 | } |
9006fb91 CH |
239 | |
240 | if (error) | |
241 | goto undo_blocks; | |
242 | ||
3d3c8b52 JL |
243 | tp->t_log_res = resp->tr_logres; |
244 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
245 | } |
246 | ||
247 | /* | |
248 | * Attempt to reserve the needed realtime extents by decrementing | |
249 | * the number needed from the number available. This will | |
250 | * fail if the count would go below zero. | |
251 | */ | |
252 | if (rtextents > 0) { | |
253 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 254 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
255 | if (error) { |
256 | error = XFS_ERROR(ENOSPC); | |
257 | goto undo_log; | |
258 | } | |
259 | tp->t_rtx_res += rtextents; | |
260 | } | |
261 | ||
262 | return 0; | |
263 | ||
264 | /* | |
265 | * Error cases jump to one of these labels to undo any | |
266 | * reservations which have already been performed. | |
267 | */ | |
268 | undo_log: | |
3d3c8b52 | 269 | if (resp->tr_logres > 0) { |
9006fb91 CH |
270 | int log_flags; |
271 | ||
3d3c8b52 | 272 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 LT |
273 | log_flags = XFS_LOG_REL_PERM_RESERV; |
274 | } else { | |
275 | log_flags = 0; | |
276 | } | |
277 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
278 | tp->t_ticket = NULL; | |
279 | tp->t_log_res = 0; | |
280 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
281 | } | |
282 | ||
283 | undo_blocks: | |
284 | if (blocks > 0) { | |
96540c78 | 285 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 286 | (int64_t)blocks, rsvd); |
1da177e4 LT |
287 | tp->t_blk_res = 0; |
288 | } | |
289 | ||
59c1b082 | 290 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 291 | |
59c1b082 | 292 | return error; |
1da177e4 LT |
293 | } |
294 | ||
1da177e4 LT |
295 | /* |
296 | * Record the indicated change to the given field for application | |
297 | * to the file system's superblock when the transaction commits. | |
298 | * For now, just store the change in the transaction structure. | |
299 | * | |
300 | * Mark the transaction structure to indicate that the superblock | |
301 | * needs to be updated before committing. | |
92821e2b DC |
302 | * |
303 | * Because we may not be keeping track of allocated/free inodes and | |
304 | * used filesystem blocks in the superblock, we do not mark the | |
305 | * superblock dirty in this transaction if we modify these fields. | |
306 | * We still need to update the transaction deltas so that they get | |
307 | * applied to the incore superblock, but we don't want them to | |
308 | * cause the superblock to get locked and logged if these are the | |
309 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
310 | */ |
311 | void | |
312 | xfs_trans_mod_sb( | |
313 | xfs_trans_t *tp, | |
314 | uint field, | |
20f4ebf2 | 315 | int64_t delta) |
1da177e4 | 316 | { |
92821e2b DC |
317 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
318 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
319 | |
320 | switch (field) { | |
321 | case XFS_TRANS_SB_ICOUNT: | |
322 | tp->t_icount_delta += delta; | |
92821e2b DC |
323 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
324 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
325 | break; |
326 | case XFS_TRANS_SB_IFREE: | |
327 | tp->t_ifree_delta += delta; | |
92821e2b DC |
328 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
329 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
330 | break; |
331 | case XFS_TRANS_SB_FDBLOCKS: | |
332 | /* | |
333 | * Track the number of blocks allocated in the | |
334 | * transaction. Make sure it does not exceed the | |
335 | * number reserved. | |
336 | */ | |
337 | if (delta < 0) { | |
338 | tp->t_blk_res_used += (uint)-delta; | |
339 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
340 | } | |
341 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
342 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
343 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
344 | break; |
345 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
346 | /* | |
347 | * The allocation has already been applied to the | |
348 | * in-core superblock's counter. This should only | |
349 | * be applied to the on-disk superblock. | |
350 | */ | |
351 | ASSERT(delta < 0); | |
352 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
353 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
354 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
355 | break; |
356 | case XFS_TRANS_SB_FREXTENTS: | |
357 | /* | |
358 | * Track the number of blocks allocated in the | |
359 | * transaction. Make sure it does not exceed the | |
360 | * number reserved. | |
361 | */ | |
362 | if (delta < 0) { | |
363 | tp->t_rtx_res_used += (uint)-delta; | |
364 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
365 | } | |
366 | tp->t_frextents_delta += delta; | |
367 | break; | |
368 | case XFS_TRANS_SB_RES_FREXTENTS: | |
369 | /* | |
370 | * The allocation has already been applied to the | |
c41564b5 | 371 | * in-core superblock's counter. This should only |
1da177e4 LT |
372 | * be applied to the on-disk superblock. |
373 | */ | |
374 | ASSERT(delta < 0); | |
375 | tp->t_res_frextents_delta += delta; | |
376 | break; | |
377 | case XFS_TRANS_SB_DBLOCKS: | |
378 | ASSERT(delta > 0); | |
379 | tp->t_dblocks_delta += delta; | |
380 | break; | |
381 | case XFS_TRANS_SB_AGCOUNT: | |
382 | ASSERT(delta > 0); | |
383 | tp->t_agcount_delta += delta; | |
384 | break; | |
385 | case XFS_TRANS_SB_IMAXPCT: | |
386 | tp->t_imaxpct_delta += delta; | |
387 | break; | |
388 | case XFS_TRANS_SB_REXTSIZE: | |
389 | tp->t_rextsize_delta += delta; | |
390 | break; | |
391 | case XFS_TRANS_SB_RBMBLOCKS: | |
392 | tp->t_rbmblocks_delta += delta; | |
393 | break; | |
394 | case XFS_TRANS_SB_RBLOCKS: | |
395 | tp->t_rblocks_delta += delta; | |
396 | break; | |
397 | case XFS_TRANS_SB_REXTENTS: | |
398 | tp->t_rextents_delta += delta; | |
399 | break; | |
400 | case XFS_TRANS_SB_REXTSLOG: | |
401 | tp->t_rextslog_delta += delta; | |
402 | break; | |
403 | default: | |
404 | ASSERT(0); | |
405 | return; | |
406 | } | |
407 | ||
210c6f1c | 408 | tp->t_flags |= flags; |
1da177e4 LT |
409 | } |
410 | ||
411 | /* | |
412 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
413 | * to bring the superblock buffer into the current transaction | |
414 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
415 | * | |
416 | * For now we just look at each field allowed to change and change | |
417 | * it if necessary. | |
418 | */ | |
419 | STATIC void | |
420 | xfs_trans_apply_sb_deltas( | |
421 | xfs_trans_t *tp) | |
422 | { | |
2bdf7cd0 | 423 | xfs_dsb_t *sbp; |
1da177e4 LT |
424 | xfs_buf_t *bp; |
425 | int whole = 0; | |
426 | ||
427 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
428 | sbp = XFS_BUF_TO_SBP(bp); | |
429 | ||
430 | /* | |
431 | * Check that superblock mods match the mods made to AGF counters. | |
432 | */ | |
433 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
434 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
435 | tp->t_ag_btree_delta)); | |
436 | ||
92821e2b DC |
437 | /* |
438 | * Only update the superblock counters if we are logging them | |
439 | */ | |
440 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 441 | if (tp->t_icount_delta) |
413d57c9 | 442 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 443 | if (tp->t_ifree_delta) |
413d57c9 | 444 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 445 | if (tp->t_fdblocks_delta) |
413d57c9 | 446 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 447 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 448 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
449 | } |
450 | ||
2bdf7cd0 | 451 | if (tp->t_frextents_delta) |
413d57c9 | 452 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 453 | if (tp->t_res_frextents_delta) |
413d57c9 | 454 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
455 | |
456 | if (tp->t_dblocks_delta) { | |
413d57c9 | 457 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
458 | whole = 1; |
459 | } | |
2bdf7cd0 | 460 | if (tp->t_agcount_delta) { |
413d57c9 | 461 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
462 | whole = 1; |
463 | } | |
2bdf7cd0 CH |
464 | if (tp->t_imaxpct_delta) { |
465 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
466 | whole = 1; |
467 | } | |
2bdf7cd0 | 468 | if (tp->t_rextsize_delta) { |
413d57c9 | 469 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
470 | whole = 1; |
471 | } | |
2bdf7cd0 | 472 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 473 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
474 | whole = 1; |
475 | } | |
2bdf7cd0 | 476 | if (tp->t_rblocks_delta) { |
413d57c9 | 477 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
478 | whole = 1; |
479 | } | |
2bdf7cd0 | 480 | if (tp->t_rextents_delta) { |
413d57c9 | 481 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
482 | whole = 1; |
483 | } | |
2bdf7cd0 CH |
484 | if (tp->t_rextslog_delta) { |
485 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
486 | whole = 1; |
487 | } | |
488 | ||
489 | if (whole) | |
490 | /* | |
c41564b5 | 491 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 492 | */ |
2bdf7cd0 | 493 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
494 | else |
495 | /* | |
496 | * Since all the modifiable fields are contiguous, we | |
497 | * can get away with this. | |
498 | */ | |
2bdf7cd0 CH |
499 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
500 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 501 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
502 | } |
503 | ||
504 | /* | |
45c34141 DC |
505 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
506 | * and apply superblock counter changes to the in-core superblock. The | |
507 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
508 | * applied to the in-core superblock. The idea is that that has already been | |
509 | * done. | |
1da177e4 LT |
510 | * |
511 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
512 | * However, we have to ensure that we only modify each superblock field only |
513 | * once because the application of the delta values may not be atomic. That can | |
514 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
515 | * free space counter to put back the entire reservation and then take away | |
516 | * what we used. | |
517 | * | |
518 | * If we are not logging superblock counters, then the inode allocated/free and | |
519 | * used block counts are not updated in the on disk superblock. In this case, | |
520 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
521 | * still need to update the incore superblock with the changes. | |
1da177e4 | 522 | */ |
71e330b5 | 523 | void |
1da177e4 LT |
524 | xfs_trans_unreserve_and_mod_sb( |
525 | xfs_trans_t *tp) | |
526 | { | |
1b040712 | 527 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 528 | xfs_mod_sb_t *msbp; |
92821e2b | 529 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
530 | /* REFERENCED */ |
531 | int error; | |
532 | int rsvd; | |
45c34141 DC |
533 | int64_t blkdelta = 0; |
534 | int64_t rtxdelta = 0; | |
1b040712 CH |
535 | int64_t idelta = 0; |
536 | int64_t ifreedelta = 0; | |
1da177e4 LT |
537 | |
538 | msbp = msb; | |
539 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
540 | ||
1b040712 | 541 | /* calculate deltas */ |
45c34141 DC |
542 | if (tp->t_blk_res > 0) |
543 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
544 | if ((tp->t_fdblocks_delta != 0) && |
545 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
546 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
547 | blkdelta += tp->t_fdblocks_delta; | |
548 | ||
45c34141 DC |
549 | if (tp->t_rtx_res > 0) |
550 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
551 | if ((tp->t_frextents_delta != 0) && |
552 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
553 | rtxdelta += tp->t_frextents_delta; | |
554 | ||
1b040712 CH |
555 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
556 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
557 | idelta = tp->t_icount_delta; | |
558 | ifreedelta = tp->t_ifree_delta; | |
559 | } | |
560 | ||
561 | /* apply the per-cpu counters */ | |
562 | if (blkdelta) { | |
563 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
564 | blkdelta, rsvd); | |
565 | if (error) | |
566 | goto out; | |
567 | } | |
568 | ||
569 | if (idelta) { | |
570 | error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, | |
571 | idelta, rsvd); | |
572 | if (error) | |
573 | goto out_undo_fdblocks; | |
574 | } | |
575 | ||
576 | if (ifreedelta) { | |
577 | error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, | |
578 | ifreedelta, rsvd); | |
579 | if (error) | |
580 | goto out_undo_icount; | |
581 | } | |
582 | ||
583 | /* apply remaining deltas */ | |
45c34141 | 584 | if (rtxdelta != 0) { |
1da177e4 | 585 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 586 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
587 | msbp++; |
588 | } | |
589 | ||
92821e2b | 590 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
591 | if (tp->t_dblocks_delta != 0) { |
592 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 593 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
594 | msbp++; |
595 | } | |
596 | if (tp->t_agcount_delta != 0) { | |
597 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 598 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
599 | msbp++; |
600 | } | |
601 | if (tp->t_imaxpct_delta != 0) { | |
602 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 603 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
604 | msbp++; |
605 | } | |
606 | if (tp->t_rextsize_delta != 0) { | |
607 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 608 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
609 | msbp++; |
610 | } | |
611 | if (tp->t_rbmblocks_delta != 0) { | |
612 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 613 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
614 | msbp++; |
615 | } | |
616 | if (tp->t_rblocks_delta != 0) { | |
617 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 618 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
619 | msbp++; |
620 | } | |
621 | if (tp->t_rextents_delta != 0) { | |
622 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 623 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
624 | msbp++; |
625 | } | |
626 | if (tp->t_rextslog_delta != 0) { | |
627 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 628 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
629 | msbp++; |
630 | } | |
631 | } | |
632 | ||
633 | /* | |
634 | * If we need to change anything, do it. | |
635 | */ | |
636 | if (msbp > msb) { | |
637 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
638 | (uint)(msbp - msb), rsvd); | |
1b040712 CH |
639 | if (error) |
640 | goto out_undo_ifreecount; | |
1da177e4 | 641 | } |
1b040712 CH |
642 | |
643 | return; | |
644 | ||
645 | out_undo_ifreecount: | |
646 | if (ifreedelta) | |
647 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); | |
648 | out_undo_icount: | |
649 | if (idelta) | |
650 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); | |
651 | out_undo_fdblocks: | |
652 | if (blkdelta) | |
653 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); | |
654 | out: | |
1884bd83 | 655 | ASSERT(error == 0); |
1b040712 | 656 | return; |
1da177e4 LT |
657 | } |
658 | ||
e98c414f CH |
659 | /* |
660 | * Add the given log item to the transaction's list of log items. | |
661 | * | |
662 | * The log item will now point to its new descriptor with its li_desc field. | |
663 | */ | |
664 | void | |
665 | xfs_trans_add_item( | |
666 | struct xfs_trans *tp, | |
667 | struct xfs_log_item *lip) | |
668 | { | |
669 | struct xfs_log_item_desc *lidp; | |
670 | ||
f65020a8 JJ |
671 | ASSERT(lip->li_mountp == tp->t_mountp); |
672 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 673 | |
43869706 | 674 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
675 | |
676 | lidp->lid_item = lip; | |
677 | lidp->lid_flags = 0; | |
e98c414f CH |
678 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
679 | ||
680 | lip->li_desc = lidp; | |
681 | } | |
682 | ||
683 | STATIC void | |
684 | xfs_trans_free_item_desc( | |
685 | struct xfs_log_item_desc *lidp) | |
686 | { | |
687 | list_del_init(&lidp->lid_trans); | |
688 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
689 | } | |
690 | ||
691 | /* | |
692 | * Unlink and free the given descriptor. | |
693 | */ | |
694 | void | |
695 | xfs_trans_del_item( | |
696 | struct xfs_log_item *lip) | |
697 | { | |
698 | xfs_trans_free_item_desc(lip->li_desc); | |
699 | lip->li_desc = NULL; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Unlock all of the items of a transaction and free all the descriptors | |
704 | * of that transaction. | |
705 | */ | |
d17c701c | 706 | void |
e98c414f CH |
707 | xfs_trans_free_items( |
708 | struct xfs_trans *tp, | |
709 | xfs_lsn_t commit_lsn, | |
710 | int flags) | |
711 | { | |
712 | struct xfs_log_item_desc *lidp, *next; | |
713 | ||
714 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
715 | struct xfs_log_item *lip = lidp->lid_item; | |
716 | ||
717 | lip->li_desc = NULL; | |
718 | ||
719 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 720 | lip->li_ops->iop_committing(lip, commit_lsn); |
e98c414f CH |
721 | if (flags & XFS_TRANS_ABORT) |
722 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 723 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
724 | |
725 | xfs_trans_free_item_desc(lidp); | |
726 | } | |
727 | } | |
728 | ||
0e57f6a3 DC |
729 | static inline void |
730 | xfs_log_item_batch_insert( | |
731 | struct xfs_ail *ailp, | |
1d8c95a3 | 732 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
733 | struct xfs_log_item **log_items, |
734 | int nr_items, | |
735 | xfs_lsn_t commit_lsn) | |
736 | { | |
737 | int i; | |
738 | ||
739 | spin_lock(&ailp->xa_lock); | |
740 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 741 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 742 | |
904c17e6 DC |
743 | for (i = 0; i < nr_items; i++) { |
744 | struct xfs_log_item *lip = log_items[i]; | |
745 | ||
746 | lip->li_ops->iop_unpin(lip, 0); | |
747 | } | |
0e57f6a3 DC |
748 | } |
749 | ||
750 | /* | |
751 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
752 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
753 | * minimise lock traffic. | |
e34a314c DC |
754 | * |
755 | * If we are called with the aborted flag set, it is because a log write during | |
756 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 757 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
758 | * means that checkpoint commit abort handling is treated exactly the same |
759 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
760 | * this case all we need to do is iop_committed processing, followed by an |
761 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
762 | * |
763 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
764 | * at the end of the AIL, the insert cursor avoids the need to walk | |
765 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
766 | * call. This saves a lot of needless list walking and is a net win, even | |
767 | * though it slightly increases that amount of AIL lock traffic to set it up | |
768 | * and tear it down. | |
0e57f6a3 DC |
769 | */ |
770 | void | |
771 | xfs_trans_committed_bulk( | |
772 | struct xfs_ail *ailp, | |
773 | struct xfs_log_vec *log_vector, | |
774 | xfs_lsn_t commit_lsn, | |
775 | int aborted) | |
776 | { | |
777 | #define LOG_ITEM_BATCH_SIZE 32 | |
778 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
779 | struct xfs_log_vec *lv; | |
1d8c95a3 | 780 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
781 | int i = 0; |
782 | ||
1d8c95a3 DC |
783 | spin_lock(&ailp->xa_lock); |
784 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
785 | spin_unlock(&ailp->xa_lock); | |
786 | ||
0e57f6a3 DC |
787 | /* unpin all the log items */ |
788 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
789 | struct xfs_log_item *lip = lv->lv_item; | |
790 | xfs_lsn_t item_lsn; | |
791 | ||
792 | if (aborted) | |
793 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 794 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 795 | |
1316d4da | 796 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
797 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
798 | continue; | |
799 | ||
e34a314c DC |
800 | /* |
801 | * if we are aborting the operation, no point in inserting the | |
802 | * object into the AIL as we are in a shutdown situation. | |
803 | */ | |
804 | if (aborted) { | |
805 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 806 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
807 | continue; |
808 | } | |
809 | ||
0e57f6a3 DC |
810 | if (item_lsn != commit_lsn) { |
811 | ||
812 | /* | |
813 | * Not a bulk update option due to unusual item_lsn. | |
814 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
815 | * we have the ail lock. Then unpin the item. This does |
816 | * not affect the AIL cursor the bulk insert path is | |
817 | * using. | |
0e57f6a3 DC |
818 | */ |
819 | spin_lock(&ailp->xa_lock); | |
820 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
821 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
822 | else | |
823 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 824 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
825 | continue; |
826 | } | |
827 | ||
828 | /* Item is a candidate for bulk AIL insert. */ | |
829 | log_items[i++] = lv->lv_item; | |
830 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 831 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
832 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
833 | i = 0; | |
834 | } | |
835 | } | |
836 | ||
837 | /* make sure we insert the remainder! */ | |
838 | if (i) | |
1d8c95a3 DC |
839 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
840 | ||
841 | spin_lock(&ailp->xa_lock); | |
842 | xfs_trans_ail_cursor_done(ailp, &cur); | |
843 | spin_unlock(&ailp->xa_lock); | |
0e57f6a3 DC |
844 | } |
845 | ||
0924378a | 846 | /* |
b1037058 | 847 | * Commit the given transaction to the log. |
0924378a DC |
848 | * |
849 | * XFS disk error handling mechanism is not based on a typical | |
850 | * transaction abort mechanism. Logically after the filesystem | |
851 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
852 | * be durable - ie. committed to disk - because some metadata might | |
853 | * be inconsistent. In such cases, this returns an error, and the | |
854 | * caller may assume that all locked objects joined to the transaction | |
855 | * have already been unlocked as if the commit had succeeded. | |
856 | * Do not reference the transaction structure after this call. | |
857 | */ | |
0924378a | 858 | int |
b1037058 | 859 | xfs_trans_commit( |
a3ccd2ca | 860 | struct xfs_trans *tp, |
b1037058 | 861 | uint flags) |
0924378a | 862 | { |
a3ccd2ca | 863 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 864 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 865 | int error = 0; |
0924378a DC |
866 | int log_flags = 0; |
867 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
868 | |
869 | /* | |
870 | * Determine whether this commit is releasing a permanent | |
871 | * log reservation or not. | |
872 | */ | |
873 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
874 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
875 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
876 | } | |
877 | ||
878 | /* | |
879 | * If there is nothing to be logged by the transaction, | |
880 | * then unlock all of the items associated with the | |
881 | * transaction and free the transaction structure. | |
882 | * Also make sure to return any reserved blocks to | |
883 | * the free pool. | |
884 | */ | |
a3ccd2ca CH |
885 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
886 | goto out_unreserve; | |
887 | ||
888 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
889 | error = XFS_ERROR(EIO); | |
890 | goto out_unreserve; | |
0924378a | 891 | } |
a3ccd2ca | 892 | |
0924378a DC |
893 | ASSERT(tp->t_ticket != NULL); |
894 | ||
895 | /* | |
896 | * If we need to update the superblock, then do it now. | |
897 | */ | |
898 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
899 | xfs_trans_apply_sb_deltas(tp); | |
900 | xfs_trans_apply_dquot_deltas(tp); | |
901 | ||
0244b960 | 902 | error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
0924378a DC |
903 | if (error == ENOMEM) { |
904 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); | |
a3ccd2ca CH |
905 | error = XFS_ERROR(EIO); |
906 | goto out_unreserve; | |
0924378a | 907 | } |
1da177e4 | 908 | |
0244b960 CH |
909 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
910 | xfs_trans_free(tp); | |
911 | ||
1da177e4 LT |
912 | /* |
913 | * If the transaction needs to be synchronous, then force the | |
914 | * log out now and wait for it. | |
915 | */ | |
916 | if (sync) { | |
f538d4da | 917 | if (!error) { |
a14a348b | 918 | error = _xfs_log_force_lsn(mp, commit_lsn, |
b1037058 | 919 | XFS_LOG_SYNC, NULL); |
f538d4da | 920 | } |
1da177e4 LT |
921 | XFS_STATS_INC(xs_trans_sync); |
922 | } else { | |
923 | XFS_STATS_INC(xs_trans_async); | |
924 | } | |
925 | ||
a3ccd2ca CH |
926 | return error; |
927 | ||
928 | out_unreserve: | |
929 | xfs_trans_unreserve_and_mod_sb(tp); | |
930 | ||
931 | /* | |
932 | * It is indeed possible for the transaction to be not dirty but | |
933 | * the dqinfo portion to be. All that means is that we have some | |
934 | * (non-persistent) quota reservations that need to be unreserved. | |
935 | */ | |
936 | xfs_trans_unreserve_and_mod_dquots(tp); | |
937 | if (tp->t_ticket) { | |
938 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
939 | if (commit_lsn == -1 && !error) | |
940 | error = XFS_ERROR(EIO); | |
941 | } | |
942 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 943 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
944 | xfs_trans_free(tp); |
945 | ||
946 | XFS_STATS_INC(xs_trans_empty); | |
947 | return error; | |
1da177e4 LT |
948 | } |
949 | ||
1da177e4 LT |
950 | /* |
951 | * Unlock all of the transaction's items and free the transaction. | |
952 | * The transaction must not have modified any of its items, because | |
953 | * there is no way to restore them to their previous state. | |
954 | * | |
955 | * If the transaction has made a log reservation, make sure to release | |
956 | * it as well. | |
957 | */ | |
958 | void | |
959 | xfs_trans_cancel( | |
960 | xfs_trans_t *tp, | |
961 | int flags) | |
962 | { | |
963 | int log_flags; | |
0733af21 | 964 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
965 | |
966 | /* | |
967 | * See if the caller is being too lazy to figure out if | |
968 | * the transaction really needs an abort. | |
969 | */ | |
970 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
971 | flags &= ~XFS_TRANS_ABORT; | |
972 | /* | |
973 | * See if the caller is relying on us to shut down the | |
974 | * filesystem. This happens in paths where we detect | |
975 | * corruption and decide to give up. | |
976 | */ | |
60a204f0 | 977 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 978 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 979 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 980 | } |
1da177e4 | 981 | #ifdef DEBUG |
e98c414f CH |
982 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
983 | struct xfs_log_item_desc *lidp; | |
984 | ||
985 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
986 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
987 | } |
988 | #endif | |
989 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 990 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
991 | |
992 | if (tp->t_ticket) { | |
993 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
994 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
995 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
996 | } else { | |
997 | log_flags = 0; | |
998 | } | |
0733af21 | 999 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1003 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 1004 | |
71e330b5 | 1005 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
1006 | xfs_trans_free(tp); |
1007 | } | |
1008 | ||
322ff6b8 NS |
1009 | /* |
1010 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1011 | * the next: permanent transactions are only flushed out when | |
1012 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
1013 | * as possible to let chunks of it go to the log. So we commit the | |
1014 | * chunk we've been working on and get a new transaction to continue. | |
1015 | */ | |
1016 | int | |
1017 | xfs_trans_roll( | |
1018 | struct xfs_trans **tpp, | |
1019 | struct xfs_inode *dp) | |
1020 | { | |
1021 | struct xfs_trans *trans; | |
3d3c8b52 | 1022 | struct xfs_trans_res tres; |
322ff6b8 NS |
1023 | int error; |
1024 | ||
1025 | /* | |
1026 | * Ensure that the inode is always logged. | |
1027 | */ | |
1028 | trans = *tpp; | |
1029 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1030 | ||
1031 | /* | |
1032 | * Copy the critical parameters from one trans to the next. | |
1033 | */ | |
3d3c8b52 JL |
1034 | tres.tr_logres = trans->t_log_res; |
1035 | tres.tr_logcount = trans->t_log_count; | |
322ff6b8 NS |
1036 | *tpp = xfs_trans_dup(trans); |
1037 | ||
1038 | /* | |
1039 | * Commit the current transaction. | |
1040 | * If this commit failed, then it'd just unlock those items that | |
1041 | * are not marked ihold. That also means that a filesystem shutdown | |
1042 | * is in progress. The caller takes the responsibility to cancel | |
1043 | * the duplicate transaction that gets returned. | |
1044 | */ | |
1045 | error = xfs_trans_commit(trans, 0); | |
1046 | if (error) | |
1047 | return (error); | |
1048 | ||
1049 | trans = *tpp; | |
1050 | ||
cc09c0dc DC |
1051 | /* |
1052 | * transaction commit worked ok so we can drop the extra ticket | |
1053 | * reference that we gained in xfs_trans_dup() | |
1054 | */ | |
1055 | xfs_log_ticket_put(trans->t_ticket); | |
1056 | ||
1057 | ||
322ff6b8 NS |
1058 | /* |
1059 | * Reserve space in the log for th next transaction. | |
1060 | * This also pushes items in the "AIL", the list of logged items, | |
1061 | * out to disk if they are taking up space at the tail of the log | |
1062 | * that we want to use. This requires that either nothing be locked | |
1063 | * across this call, or that anything that is locked be logged in | |
1064 | * the prior and the next transactions. | |
1065 | */ | |
3d3c8b52 JL |
1066 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
1067 | error = xfs_trans_reserve(trans, &tres, 0, 0); | |
322ff6b8 NS |
1068 | /* |
1069 | * Ensure that the inode is in the new transaction and locked. | |
1070 | */ | |
1071 | if (error) | |
1072 | return error; | |
1073 | ||
ddc3415a | 1074 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1075 | return 0; |
1076 | } |