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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 LT |
25 | #include "xfs_sb.h" |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_mount.h" |
28 | #include "xfs_error.h" | |
57062787 | 29 | #include "xfs_da_format.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" |
239880ef | 41 | #include "xfs_trans.h" |
a844f451 | 42 | #include "xfs_trans_priv.h" |
1da177e4 | 43 | #include "xfs_trans_space.h" |
239880ef | 44 | #include "xfs_qm.h" |
322ff6b8 | 45 | #include "xfs_inode_item.h" |
239880ef | 46 | #include "xfs_log.h" |
4f3b5783 JL |
47 | #include "xfs_log_priv.h" |
48 | #include "xfs_buf_item.h" | |
ed3b4d6c | 49 | #include "xfs_trace.h" |
1da177e4 | 50 | |
8f794055 | 51 | kmem_zone_t *xfs_trans_zone; |
e98c414f | 52 | kmem_zone_t *xfs_log_item_desc_zone; |
1da177e4 | 53 | |
1da177e4 LT |
54 | /* |
55 | * Initialize the precomputed transaction reservation values | |
56 | * in the mount structure. | |
57 | */ | |
58 | void | |
59 | xfs_trans_init( | |
025101dc | 60 | struct xfs_mount *mp) |
1da177e4 | 61 | { |
3d3c8b52 | 62 | xfs_trans_resv_calc(mp, M_RES(mp)); |
1da177e4 LT |
63 | } |
64 | ||
65 | /* | |
66 | * This routine is called to allocate a transaction structure. | |
67 | * The type parameter indicates the type of the transaction. These | |
68 | * are enumerated in xfs_trans.h. | |
b2ce3974 AE |
69 | * |
70 | * Dynamically allocate the transaction structure from the transaction | |
71 | * zone, initialize it, and return it to the caller. | |
1da177e4 | 72 | */ |
b2ce3974 AE |
73 | xfs_trans_t * |
74 | xfs_trans_alloc( | |
75 | xfs_mount_t *mp, | |
76 | uint type) | |
77 | { | |
d9457dc0 JK |
78 | xfs_trans_t *tp; |
79 | ||
80 | sb_start_intwrite(mp->m_super); | |
81 | tp = _xfs_trans_alloc(mp, type, KM_SLEEP); | |
82 | tp->t_flags |= XFS_TRANS_FREEZE_PROT; | |
83 | return tp; | |
b2ce3974 AE |
84 | } |
85 | ||
86 | xfs_trans_t * | |
1da177e4 | 87 | _xfs_trans_alloc( |
b2ce3974 AE |
88 | xfs_mount_t *mp, |
89 | uint type, | |
77ba7877 | 90 | xfs_km_flags_t memflags) |
1da177e4 | 91 | { |
b2ce3974 | 92 | xfs_trans_t *tp; |
1da177e4 | 93 | |
d9457dc0 | 94 | WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); |
34327e13 | 95 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 96 | |
80641dc6 | 97 | tp = kmem_zone_zalloc(xfs_trans_zone, memflags); |
2a3c0acc | 98 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
99 | tp->t_type = type; |
100 | tp->t_mountp = mp; | |
e98c414f | 101 | INIT_LIST_HEAD(&tp->t_items); |
ed3b4d6c | 102 | INIT_LIST_HEAD(&tp->t_busy); |
34327e13 | 103 | return tp; |
1da177e4 LT |
104 | } |
105 | ||
b1c1b5b6 DC |
106 | /* |
107 | * Free the transaction structure. If there is more clean up | |
108 | * to do when the structure is freed, add it here. | |
109 | */ | |
110 | STATIC void | |
111 | xfs_trans_free( | |
ed3b4d6c | 112 | struct xfs_trans *tp) |
b1c1b5b6 | 113 | { |
4ecbfe63 DC |
114 | xfs_extent_busy_sort(&tp->t_busy); |
115 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 116 | |
b1c1b5b6 | 117 | atomic_dec(&tp->t_mountp->m_active_trans); |
d9457dc0 JK |
118 | if (tp->t_flags & XFS_TRANS_FREEZE_PROT) |
119 | sb_end_intwrite(tp->t_mountp->m_super); | |
b1c1b5b6 DC |
120 | xfs_trans_free_dqinfo(tp); |
121 | kmem_zone_free(xfs_trans_zone, tp); | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * This is called to create a new transaction which will share the | |
126 | * permanent log reservation of the given transaction. The remaining | |
127 | * unused block and rt extent reservations are also inherited. This | |
128 | * implies that the original transaction is no longer allowed to allocate | |
129 | * blocks. Locks and log items, however, are no inherited. They must | |
130 | * be added to the new transaction explicitly. | |
131 | */ | |
132 | xfs_trans_t * | |
133 | xfs_trans_dup( | |
134 | xfs_trans_t *tp) | |
135 | { | |
136 | xfs_trans_t *ntp; | |
137 | ||
138 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
139 | ||
140 | /* | |
141 | * Initialize the new transaction structure. | |
142 | */ | |
2a3c0acc | 143 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 LT |
144 | ntp->t_type = tp->t_type; |
145 | ntp->t_mountp = tp->t_mountp; | |
e98c414f | 146 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 147 | INIT_LIST_HEAD(&ntp->t_busy); |
1da177e4 LT |
148 | |
149 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 150 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 151 | |
d9457dc0 JK |
152 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
153 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
154 | (tp->t_flags & XFS_TRANS_FREEZE_PROT); | |
155 | /* We gave our writer reference to the new transaction */ | |
156 | tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; | |
cc09c0dc | 157 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
158 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
159 | tp->t_blk_res = tp->t_blk_res_used; | |
160 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
161 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 162 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 163 | |
7d095257 | 164 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
165 | |
166 | atomic_inc(&tp->t_mountp->m_active_trans); | |
167 | return ntp; | |
168 | } | |
169 | ||
170 | /* | |
171 | * This is called to reserve free disk blocks and log space for the | |
172 | * given transaction. This must be done before allocating any resources | |
173 | * within the transaction. | |
174 | * | |
175 | * This will return ENOSPC if there are not enough blocks available. | |
176 | * It will sleep waiting for available log space. | |
177 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
178 | * is used by long running transactions. If any one of the reservations | |
179 | * fails then they will all be backed out. | |
180 | * | |
181 | * This does not do quota reservations. That typically is done by the | |
182 | * caller afterwards. | |
183 | */ | |
184 | int | |
185 | xfs_trans_reserve( | |
3d3c8b52 JL |
186 | struct xfs_trans *tp, |
187 | struct xfs_trans_res *resp, | |
188 | uint blocks, | |
189 | uint rtextents) | |
1da177e4 | 190 | { |
59c1b082 NS |
191 | int error = 0; |
192 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
193 | |
194 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 195 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
196 | |
197 | /* | |
198 | * Attempt to reserve the needed disk blocks by decrementing | |
199 | * the number needed from the number available. This will | |
200 | * fail if the count would go below zero. | |
201 | */ | |
202 | if (blocks > 0) { | |
96540c78 | 203 | error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 204 | -((int64_t)blocks), rsvd); |
1da177e4 | 205 | if (error != 0) { |
59c1b082 | 206 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
207 | return (XFS_ERROR(ENOSPC)); |
208 | } | |
209 | tp->t_blk_res += blocks; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Reserve the log space needed for this transaction. | |
214 | */ | |
3d3c8b52 | 215 | if (resp->tr_logres > 0) { |
9006fb91 CH |
216 | bool permanent = false; |
217 | ||
3d3c8b52 JL |
218 | ASSERT(tp->t_log_res == 0 || |
219 | tp->t_log_res == resp->tr_logres); | |
220 | ASSERT(tp->t_log_count == 0 || | |
221 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 222 | |
3d3c8b52 | 223 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 224 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 225 | permanent = true; |
1da177e4 LT |
226 | } else { |
227 | ASSERT(tp->t_ticket == NULL); | |
228 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
229 | } |
230 | ||
9006fb91 | 231 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 232 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
233 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
234 | } else { | |
3d3c8b52 JL |
235 | error = xfs_log_reserve(tp->t_mountp, |
236 | resp->tr_logres, | |
237 | resp->tr_logcount, | |
238 | &tp->t_ticket, XFS_TRANSACTION, | |
239 | permanent, tp->t_type); | |
1da177e4 | 240 | } |
9006fb91 CH |
241 | |
242 | if (error) | |
243 | goto undo_blocks; | |
244 | ||
3d3c8b52 JL |
245 | tp->t_log_res = resp->tr_logres; |
246 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
247 | } |
248 | ||
249 | /* | |
250 | * Attempt to reserve the needed realtime extents by decrementing | |
251 | * the number needed from the number available. This will | |
252 | * fail if the count would go below zero. | |
253 | */ | |
254 | if (rtextents > 0) { | |
255 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 256 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
257 | if (error) { |
258 | error = XFS_ERROR(ENOSPC); | |
259 | goto undo_log; | |
260 | } | |
261 | tp->t_rtx_res += rtextents; | |
262 | } | |
263 | ||
264 | return 0; | |
265 | ||
266 | /* | |
267 | * Error cases jump to one of these labels to undo any | |
268 | * reservations which have already been performed. | |
269 | */ | |
270 | undo_log: | |
3d3c8b52 | 271 | if (resp->tr_logres > 0) { |
9006fb91 CH |
272 | int log_flags; |
273 | ||
3d3c8b52 | 274 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 LT |
275 | log_flags = XFS_LOG_REL_PERM_RESERV; |
276 | } else { | |
277 | log_flags = 0; | |
278 | } | |
279 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
280 | tp->t_ticket = NULL; | |
281 | tp->t_log_res = 0; | |
282 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
283 | } | |
284 | ||
285 | undo_blocks: | |
286 | if (blocks > 0) { | |
96540c78 | 287 | xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 288 | (int64_t)blocks, rsvd); |
1da177e4 LT |
289 | tp->t_blk_res = 0; |
290 | } | |
291 | ||
59c1b082 | 292 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 293 | |
59c1b082 | 294 | return error; |
1da177e4 LT |
295 | } |
296 | ||
1da177e4 LT |
297 | /* |
298 | * Record the indicated change to the given field for application | |
299 | * to the file system's superblock when the transaction commits. | |
300 | * For now, just store the change in the transaction structure. | |
301 | * | |
302 | * Mark the transaction structure to indicate that the superblock | |
303 | * needs to be updated before committing. | |
92821e2b DC |
304 | * |
305 | * Because we may not be keeping track of allocated/free inodes and | |
306 | * used filesystem blocks in the superblock, we do not mark the | |
307 | * superblock dirty in this transaction if we modify these fields. | |
308 | * We still need to update the transaction deltas so that they get | |
309 | * applied to the incore superblock, but we don't want them to | |
310 | * cause the superblock to get locked and logged if these are the | |
311 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
312 | */ |
313 | void | |
314 | xfs_trans_mod_sb( | |
315 | xfs_trans_t *tp, | |
316 | uint field, | |
20f4ebf2 | 317 | int64_t delta) |
1da177e4 | 318 | { |
92821e2b DC |
319 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
320 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
321 | |
322 | switch (field) { | |
323 | case XFS_TRANS_SB_ICOUNT: | |
324 | tp->t_icount_delta += delta; | |
92821e2b DC |
325 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
326 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
327 | break; |
328 | case XFS_TRANS_SB_IFREE: | |
329 | tp->t_ifree_delta += delta; | |
92821e2b DC |
330 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
331 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
332 | break; |
333 | case XFS_TRANS_SB_FDBLOCKS: | |
334 | /* | |
335 | * Track the number of blocks allocated in the | |
336 | * transaction. Make sure it does not exceed the | |
337 | * number reserved. | |
338 | */ | |
339 | if (delta < 0) { | |
340 | tp->t_blk_res_used += (uint)-delta; | |
341 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
342 | } | |
343 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
344 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
345 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
346 | break; |
347 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
348 | /* | |
349 | * The allocation has already been applied to the | |
350 | * in-core superblock's counter. This should only | |
351 | * be applied to the on-disk superblock. | |
352 | */ | |
353 | ASSERT(delta < 0); | |
354 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
355 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
356 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
357 | break; |
358 | case XFS_TRANS_SB_FREXTENTS: | |
359 | /* | |
360 | * Track the number of blocks allocated in the | |
361 | * transaction. Make sure it does not exceed the | |
362 | * number reserved. | |
363 | */ | |
364 | if (delta < 0) { | |
365 | tp->t_rtx_res_used += (uint)-delta; | |
366 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
367 | } | |
368 | tp->t_frextents_delta += delta; | |
369 | break; | |
370 | case XFS_TRANS_SB_RES_FREXTENTS: | |
371 | /* | |
372 | * The allocation has already been applied to the | |
c41564b5 | 373 | * in-core superblock's counter. This should only |
1da177e4 LT |
374 | * be applied to the on-disk superblock. |
375 | */ | |
376 | ASSERT(delta < 0); | |
377 | tp->t_res_frextents_delta += delta; | |
378 | break; | |
379 | case XFS_TRANS_SB_DBLOCKS: | |
380 | ASSERT(delta > 0); | |
381 | tp->t_dblocks_delta += delta; | |
382 | break; | |
383 | case XFS_TRANS_SB_AGCOUNT: | |
384 | ASSERT(delta > 0); | |
385 | tp->t_agcount_delta += delta; | |
386 | break; | |
387 | case XFS_TRANS_SB_IMAXPCT: | |
388 | tp->t_imaxpct_delta += delta; | |
389 | break; | |
390 | case XFS_TRANS_SB_REXTSIZE: | |
391 | tp->t_rextsize_delta += delta; | |
392 | break; | |
393 | case XFS_TRANS_SB_RBMBLOCKS: | |
394 | tp->t_rbmblocks_delta += delta; | |
395 | break; | |
396 | case XFS_TRANS_SB_RBLOCKS: | |
397 | tp->t_rblocks_delta += delta; | |
398 | break; | |
399 | case XFS_TRANS_SB_REXTENTS: | |
400 | tp->t_rextents_delta += delta; | |
401 | break; | |
402 | case XFS_TRANS_SB_REXTSLOG: | |
403 | tp->t_rextslog_delta += delta; | |
404 | break; | |
405 | default: | |
406 | ASSERT(0); | |
407 | return; | |
408 | } | |
409 | ||
210c6f1c | 410 | tp->t_flags |= flags; |
1da177e4 LT |
411 | } |
412 | ||
413 | /* | |
414 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
415 | * to bring the superblock buffer into the current transaction | |
416 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
417 | * | |
418 | * For now we just look at each field allowed to change and change | |
419 | * it if necessary. | |
420 | */ | |
421 | STATIC void | |
422 | xfs_trans_apply_sb_deltas( | |
423 | xfs_trans_t *tp) | |
424 | { | |
2bdf7cd0 | 425 | xfs_dsb_t *sbp; |
1da177e4 LT |
426 | xfs_buf_t *bp; |
427 | int whole = 0; | |
428 | ||
429 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
430 | sbp = XFS_BUF_TO_SBP(bp); | |
431 | ||
432 | /* | |
433 | * Check that superblock mods match the mods made to AGF counters. | |
434 | */ | |
435 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
436 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
437 | tp->t_ag_btree_delta)); | |
438 | ||
92821e2b DC |
439 | /* |
440 | * Only update the superblock counters if we are logging them | |
441 | */ | |
442 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 443 | if (tp->t_icount_delta) |
413d57c9 | 444 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 445 | if (tp->t_ifree_delta) |
413d57c9 | 446 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 447 | if (tp->t_fdblocks_delta) |
413d57c9 | 448 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 449 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 450 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
451 | } |
452 | ||
2bdf7cd0 | 453 | if (tp->t_frextents_delta) |
413d57c9 | 454 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 455 | if (tp->t_res_frextents_delta) |
413d57c9 | 456 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
457 | |
458 | if (tp->t_dblocks_delta) { | |
413d57c9 | 459 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
460 | whole = 1; |
461 | } | |
2bdf7cd0 | 462 | if (tp->t_agcount_delta) { |
413d57c9 | 463 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
464 | whole = 1; |
465 | } | |
2bdf7cd0 CH |
466 | if (tp->t_imaxpct_delta) { |
467 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
468 | whole = 1; |
469 | } | |
2bdf7cd0 | 470 | if (tp->t_rextsize_delta) { |
413d57c9 | 471 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
472 | whole = 1; |
473 | } | |
2bdf7cd0 | 474 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 475 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
476 | whole = 1; |
477 | } | |
2bdf7cd0 | 478 | if (tp->t_rblocks_delta) { |
413d57c9 | 479 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
480 | whole = 1; |
481 | } | |
2bdf7cd0 | 482 | if (tp->t_rextents_delta) { |
413d57c9 | 483 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
484 | whole = 1; |
485 | } | |
2bdf7cd0 CH |
486 | if (tp->t_rextslog_delta) { |
487 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
488 | whole = 1; |
489 | } | |
490 | ||
491 | if (whole) | |
492 | /* | |
c41564b5 | 493 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 494 | */ |
2bdf7cd0 | 495 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
496 | else |
497 | /* | |
498 | * Since all the modifiable fields are contiguous, we | |
499 | * can get away with this. | |
500 | */ | |
2bdf7cd0 CH |
501 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
502 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 503 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
504 | } |
505 | ||
506 | /* | |
45c34141 DC |
507 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
508 | * and apply superblock counter changes to the in-core superblock. The | |
509 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
510 | * applied to the in-core superblock. The idea is that that has already been | |
511 | * done. | |
1da177e4 LT |
512 | * |
513 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
514 | * However, we have to ensure that we only modify each superblock field only |
515 | * once because the application of the delta values may not be atomic. That can | |
516 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
517 | * free space counter to put back the entire reservation and then take away | |
518 | * what we used. | |
519 | * | |
520 | * If we are not logging superblock counters, then the inode allocated/free and | |
521 | * used block counts are not updated in the on disk superblock. In this case, | |
522 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
523 | * still need to update the incore superblock with the changes. | |
1da177e4 | 524 | */ |
71e330b5 | 525 | void |
1da177e4 LT |
526 | xfs_trans_unreserve_and_mod_sb( |
527 | xfs_trans_t *tp) | |
528 | { | |
1b040712 | 529 | xfs_mod_sb_t msb[9]; /* If you add cases, add entries */ |
1da177e4 | 530 | xfs_mod_sb_t *msbp; |
92821e2b | 531 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
532 | /* REFERENCED */ |
533 | int error; | |
534 | int rsvd; | |
45c34141 DC |
535 | int64_t blkdelta = 0; |
536 | int64_t rtxdelta = 0; | |
1b040712 CH |
537 | int64_t idelta = 0; |
538 | int64_t ifreedelta = 0; | |
1da177e4 LT |
539 | |
540 | msbp = msb; | |
541 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
542 | ||
1b040712 | 543 | /* calculate deltas */ |
45c34141 DC |
544 | if (tp->t_blk_res > 0) |
545 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
546 | if ((tp->t_fdblocks_delta != 0) && |
547 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
548 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
549 | blkdelta += tp->t_fdblocks_delta; | |
550 | ||
45c34141 DC |
551 | if (tp->t_rtx_res > 0) |
552 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
553 | if ((tp->t_frextents_delta != 0) && |
554 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
555 | rtxdelta += tp->t_frextents_delta; | |
556 | ||
1b040712 CH |
557 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
558 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
559 | idelta = tp->t_icount_delta; | |
560 | ifreedelta = tp->t_ifree_delta; | |
561 | } | |
562 | ||
563 | /* apply the per-cpu counters */ | |
564 | if (blkdelta) { | |
565 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
566 | blkdelta, rsvd); | |
567 | if (error) | |
568 | goto out; | |
569 | } | |
570 | ||
571 | if (idelta) { | |
572 | error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, | |
573 | idelta, rsvd); | |
574 | if (error) | |
575 | goto out_undo_fdblocks; | |
576 | } | |
577 | ||
578 | if (ifreedelta) { | |
579 | error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, | |
580 | ifreedelta, rsvd); | |
581 | if (error) | |
582 | goto out_undo_icount; | |
583 | } | |
584 | ||
585 | /* apply remaining deltas */ | |
45c34141 | 586 | if (rtxdelta != 0) { |
1da177e4 | 587 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 588 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
589 | msbp++; |
590 | } | |
591 | ||
92821e2b | 592 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { |
1da177e4 LT |
593 | if (tp->t_dblocks_delta != 0) { |
594 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 595 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
596 | msbp++; |
597 | } | |
598 | if (tp->t_agcount_delta != 0) { | |
599 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 600 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
601 | msbp++; |
602 | } | |
603 | if (tp->t_imaxpct_delta != 0) { | |
604 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 605 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
606 | msbp++; |
607 | } | |
608 | if (tp->t_rextsize_delta != 0) { | |
609 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 610 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
611 | msbp++; |
612 | } | |
613 | if (tp->t_rbmblocks_delta != 0) { | |
614 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 615 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
616 | msbp++; |
617 | } | |
618 | if (tp->t_rblocks_delta != 0) { | |
619 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 620 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
621 | msbp++; |
622 | } | |
623 | if (tp->t_rextents_delta != 0) { | |
624 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 625 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
626 | msbp++; |
627 | } | |
628 | if (tp->t_rextslog_delta != 0) { | |
629 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 630 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
631 | msbp++; |
632 | } | |
633 | } | |
634 | ||
635 | /* | |
636 | * If we need to change anything, do it. | |
637 | */ | |
638 | if (msbp > msb) { | |
639 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
640 | (uint)(msbp - msb), rsvd); | |
1b040712 CH |
641 | if (error) |
642 | goto out_undo_ifreecount; | |
1da177e4 | 643 | } |
1b040712 CH |
644 | |
645 | return; | |
646 | ||
647 | out_undo_ifreecount: | |
648 | if (ifreedelta) | |
649 | xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); | |
650 | out_undo_icount: | |
651 | if (idelta) | |
652 | xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); | |
653 | out_undo_fdblocks: | |
654 | if (blkdelta) | |
655 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); | |
656 | out: | |
1884bd83 | 657 | ASSERT(error == 0); |
1b040712 | 658 | return; |
1da177e4 LT |
659 | } |
660 | ||
e98c414f CH |
661 | /* |
662 | * Add the given log item to the transaction's list of log items. | |
663 | * | |
664 | * The log item will now point to its new descriptor with its li_desc field. | |
665 | */ | |
666 | void | |
667 | xfs_trans_add_item( | |
668 | struct xfs_trans *tp, | |
669 | struct xfs_log_item *lip) | |
670 | { | |
671 | struct xfs_log_item_desc *lidp; | |
672 | ||
f65020a8 JJ |
673 | ASSERT(lip->li_mountp == tp->t_mountp); |
674 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e98c414f | 675 | |
43869706 | 676 | lidp = kmem_zone_zalloc(xfs_log_item_desc_zone, KM_SLEEP | KM_NOFS); |
e98c414f CH |
677 | |
678 | lidp->lid_item = lip; | |
679 | lidp->lid_flags = 0; | |
e98c414f CH |
680 | list_add_tail(&lidp->lid_trans, &tp->t_items); |
681 | ||
682 | lip->li_desc = lidp; | |
683 | } | |
684 | ||
685 | STATIC void | |
686 | xfs_trans_free_item_desc( | |
687 | struct xfs_log_item_desc *lidp) | |
688 | { | |
689 | list_del_init(&lidp->lid_trans); | |
690 | kmem_zone_free(xfs_log_item_desc_zone, lidp); | |
691 | } | |
692 | ||
693 | /* | |
694 | * Unlink and free the given descriptor. | |
695 | */ | |
696 | void | |
697 | xfs_trans_del_item( | |
698 | struct xfs_log_item *lip) | |
699 | { | |
700 | xfs_trans_free_item_desc(lip->li_desc); | |
701 | lip->li_desc = NULL; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Unlock all of the items of a transaction and free all the descriptors | |
706 | * of that transaction. | |
707 | */ | |
d17c701c | 708 | void |
e98c414f CH |
709 | xfs_trans_free_items( |
710 | struct xfs_trans *tp, | |
711 | xfs_lsn_t commit_lsn, | |
712 | int flags) | |
713 | { | |
714 | struct xfs_log_item_desc *lidp, *next; | |
715 | ||
716 | list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) { | |
717 | struct xfs_log_item *lip = lidp->lid_item; | |
718 | ||
719 | lip->li_desc = NULL; | |
720 | ||
721 | if (commit_lsn != NULLCOMMITLSN) | |
904c17e6 | 722 | lip->li_ops->iop_committing(lip, commit_lsn); |
e98c414f CH |
723 | if (flags & XFS_TRANS_ABORT) |
724 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 725 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
726 | |
727 | xfs_trans_free_item_desc(lidp); | |
728 | } | |
729 | } | |
730 | ||
0e57f6a3 DC |
731 | static inline void |
732 | xfs_log_item_batch_insert( | |
733 | struct xfs_ail *ailp, | |
1d8c95a3 | 734 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
735 | struct xfs_log_item **log_items, |
736 | int nr_items, | |
737 | xfs_lsn_t commit_lsn) | |
738 | { | |
739 | int i; | |
740 | ||
741 | spin_lock(&ailp->xa_lock); | |
742 | /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ | |
1d8c95a3 | 743 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 744 | |
904c17e6 DC |
745 | for (i = 0; i < nr_items; i++) { |
746 | struct xfs_log_item *lip = log_items[i]; | |
747 | ||
748 | lip->li_ops->iop_unpin(lip, 0); | |
749 | } | |
0e57f6a3 DC |
750 | } |
751 | ||
752 | /* | |
753 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
754 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
755 | * minimise lock traffic. | |
e34a314c DC |
756 | * |
757 | * If we are called with the aborted flag set, it is because a log write during | |
758 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 759 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
760 | * means that checkpoint commit abort handling is treated exactly the same |
761 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
762 | * this case all we need to do is iop_committed processing, followed by an |
763 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
764 | * |
765 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
766 | * at the end of the AIL, the insert cursor avoids the need to walk | |
767 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
768 | * call. This saves a lot of needless list walking and is a net win, even | |
769 | * though it slightly increases that amount of AIL lock traffic to set it up | |
770 | * and tear it down. | |
0e57f6a3 DC |
771 | */ |
772 | void | |
773 | xfs_trans_committed_bulk( | |
774 | struct xfs_ail *ailp, | |
775 | struct xfs_log_vec *log_vector, | |
776 | xfs_lsn_t commit_lsn, | |
777 | int aborted) | |
778 | { | |
779 | #define LOG_ITEM_BATCH_SIZE 32 | |
780 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
781 | struct xfs_log_vec *lv; | |
1d8c95a3 | 782 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
783 | int i = 0; |
784 | ||
1d8c95a3 DC |
785 | spin_lock(&ailp->xa_lock); |
786 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); | |
787 | spin_unlock(&ailp->xa_lock); | |
788 | ||
0e57f6a3 DC |
789 | /* unpin all the log items */ |
790 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
791 | struct xfs_log_item *lip = lv->lv_item; | |
792 | xfs_lsn_t item_lsn; | |
793 | ||
794 | if (aborted) | |
795 | lip->li_flags |= XFS_LI_ABORTED; | |
904c17e6 | 796 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 797 | |
1316d4da | 798 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
799 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
800 | continue; | |
801 | ||
e34a314c DC |
802 | /* |
803 | * if we are aborting the operation, no point in inserting the | |
804 | * object into the AIL as we are in a shutdown situation. | |
805 | */ | |
806 | if (aborted) { | |
807 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->xa_mount)); | |
904c17e6 | 808 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
809 | continue; |
810 | } | |
811 | ||
0e57f6a3 DC |
812 | if (item_lsn != commit_lsn) { |
813 | ||
814 | /* | |
815 | * Not a bulk update option due to unusual item_lsn. | |
816 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
817 | * we have the ail lock. Then unpin the item. This does |
818 | * not affect the AIL cursor the bulk insert path is | |
819 | * using. | |
0e57f6a3 DC |
820 | */ |
821 | spin_lock(&ailp->xa_lock); | |
822 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) | |
823 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
824 | else | |
825 | spin_unlock(&ailp->xa_lock); | |
904c17e6 | 826 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
827 | continue; |
828 | } | |
829 | ||
830 | /* Item is a candidate for bulk AIL insert. */ | |
831 | log_items[i++] = lv->lv_item; | |
832 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 833 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
834 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
835 | i = 0; | |
836 | } | |
837 | } | |
838 | ||
839 | /* make sure we insert the remainder! */ | |
840 | if (i) | |
1d8c95a3 DC |
841 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
842 | ||
843 | spin_lock(&ailp->xa_lock); | |
844 | xfs_trans_ail_cursor_done(ailp, &cur); | |
845 | spin_unlock(&ailp->xa_lock); | |
0e57f6a3 DC |
846 | } |
847 | ||
0924378a | 848 | /* |
b1037058 | 849 | * Commit the given transaction to the log. |
0924378a DC |
850 | * |
851 | * XFS disk error handling mechanism is not based on a typical | |
852 | * transaction abort mechanism. Logically after the filesystem | |
853 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
854 | * be durable - ie. committed to disk - because some metadata might | |
855 | * be inconsistent. In such cases, this returns an error, and the | |
856 | * caller may assume that all locked objects joined to the transaction | |
857 | * have already been unlocked as if the commit had succeeded. | |
858 | * Do not reference the transaction structure after this call. | |
859 | */ | |
0924378a | 860 | int |
b1037058 | 861 | xfs_trans_commit( |
a3ccd2ca | 862 | struct xfs_trans *tp, |
b1037058 | 863 | uint flags) |
0924378a | 864 | { |
a3ccd2ca | 865 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 866 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 867 | int error = 0; |
0924378a DC |
868 | int log_flags = 0; |
869 | int sync = tp->t_flags & XFS_TRANS_SYNC; | |
0924378a DC |
870 | |
871 | /* | |
872 | * Determine whether this commit is releasing a permanent | |
873 | * log reservation or not. | |
874 | */ | |
875 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
876 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
877 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
878 | } | |
879 | ||
880 | /* | |
881 | * If there is nothing to be logged by the transaction, | |
882 | * then unlock all of the items associated with the | |
883 | * transaction and free the transaction structure. | |
884 | * Also make sure to return any reserved blocks to | |
885 | * the free pool. | |
886 | */ | |
a3ccd2ca CH |
887 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
888 | goto out_unreserve; | |
889 | ||
890 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
891 | error = XFS_ERROR(EIO); | |
892 | goto out_unreserve; | |
0924378a | 893 | } |
a3ccd2ca | 894 | |
0924378a DC |
895 | ASSERT(tp->t_ticket != NULL); |
896 | ||
897 | /* | |
898 | * If we need to update the superblock, then do it now. | |
899 | */ | |
900 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
901 | xfs_trans_apply_sb_deltas(tp); | |
902 | xfs_trans_apply_dquot_deltas(tp); | |
903 | ||
0244b960 | 904 | error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags); |
0924378a DC |
905 | if (error == ENOMEM) { |
906 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); | |
a3ccd2ca CH |
907 | error = XFS_ERROR(EIO); |
908 | goto out_unreserve; | |
0924378a | 909 | } |
1da177e4 | 910 | |
0244b960 CH |
911 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
912 | xfs_trans_free(tp); | |
913 | ||
1da177e4 LT |
914 | /* |
915 | * If the transaction needs to be synchronous, then force the | |
916 | * log out now and wait for it. | |
917 | */ | |
918 | if (sync) { | |
f538d4da | 919 | if (!error) { |
a14a348b | 920 | error = _xfs_log_force_lsn(mp, commit_lsn, |
b1037058 | 921 | XFS_LOG_SYNC, NULL); |
f538d4da | 922 | } |
1da177e4 LT |
923 | XFS_STATS_INC(xs_trans_sync); |
924 | } else { | |
925 | XFS_STATS_INC(xs_trans_async); | |
926 | } | |
927 | ||
a3ccd2ca CH |
928 | return error; |
929 | ||
930 | out_unreserve: | |
931 | xfs_trans_unreserve_and_mod_sb(tp); | |
932 | ||
933 | /* | |
934 | * It is indeed possible for the transaction to be not dirty but | |
935 | * the dqinfo portion to be. All that means is that we have some | |
936 | * (non-persistent) quota reservations that need to be unreserved. | |
937 | */ | |
938 | xfs_trans_unreserve_and_mod_dquots(tp); | |
939 | if (tp->t_ticket) { | |
940 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags); | |
941 | if (commit_lsn == -1 && !error) | |
942 | error = XFS_ERROR(EIO); | |
943 | } | |
944 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); | |
71e330b5 | 945 | xfs_trans_free_items(tp, NULLCOMMITLSN, error ? XFS_TRANS_ABORT : 0); |
a3ccd2ca CH |
946 | xfs_trans_free(tp); |
947 | ||
948 | XFS_STATS_INC(xs_trans_empty); | |
949 | return error; | |
1da177e4 LT |
950 | } |
951 | ||
1da177e4 LT |
952 | /* |
953 | * Unlock all of the transaction's items and free the transaction. | |
954 | * The transaction must not have modified any of its items, because | |
955 | * there is no way to restore them to their previous state. | |
956 | * | |
957 | * If the transaction has made a log reservation, make sure to release | |
958 | * it as well. | |
959 | */ | |
960 | void | |
961 | xfs_trans_cancel( | |
962 | xfs_trans_t *tp, | |
963 | int flags) | |
964 | { | |
965 | int log_flags; | |
0733af21 | 966 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
967 | |
968 | /* | |
969 | * See if the caller is being too lazy to figure out if | |
970 | * the transaction really needs an abort. | |
971 | */ | |
972 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
973 | flags &= ~XFS_TRANS_ABORT; | |
974 | /* | |
975 | * See if the caller is relying on us to shut down the | |
976 | * filesystem. This happens in paths where we detect | |
977 | * corruption and decide to give up. | |
978 | */ | |
60a204f0 | 979 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 980 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 981 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 982 | } |
1da177e4 | 983 | #ifdef DEBUG |
e98c414f CH |
984 | if (!(flags & XFS_TRANS_ABORT) && !XFS_FORCED_SHUTDOWN(mp)) { |
985 | struct xfs_log_item_desc *lidp; | |
986 | ||
987 | list_for_each_entry(lidp, &tp->t_items, lid_trans) | |
988 | ASSERT(!(lidp->lid_item->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
989 | } |
990 | #endif | |
991 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 992 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
993 | |
994 | if (tp->t_ticket) { | |
995 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
996 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
997 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
998 | } else { | |
999 | log_flags = 0; | |
1000 | } | |
0733af21 | 1001 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1005 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 1006 | |
71e330b5 | 1007 | xfs_trans_free_items(tp, NULLCOMMITLSN, flags); |
1da177e4 LT |
1008 | xfs_trans_free(tp); |
1009 | } | |
1010 | ||
322ff6b8 NS |
1011 | /* |
1012 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1013 | * the next: permanent transactions are only flushed out when | |
1014 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
1015 | * as possible to let chunks of it go to the log. So we commit the | |
1016 | * chunk we've been working on and get a new transaction to continue. | |
1017 | */ | |
1018 | int | |
1019 | xfs_trans_roll( | |
1020 | struct xfs_trans **tpp, | |
1021 | struct xfs_inode *dp) | |
1022 | { | |
1023 | struct xfs_trans *trans; | |
3d3c8b52 | 1024 | struct xfs_trans_res tres; |
322ff6b8 NS |
1025 | int error; |
1026 | ||
1027 | /* | |
1028 | * Ensure that the inode is always logged. | |
1029 | */ | |
1030 | trans = *tpp; | |
1031 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
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 | */ | |
1047 | error = xfs_trans_commit(trans, 0); | |
1048 | if (error) | |
1049 | return (error); | |
1050 | ||
1051 | trans = *tpp; | |
1052 | ||
cc09c0dc DC |
1053 | /* |
1054 | * transaction commit worked ok so we can drop the extra ticket | |
1055 | * reference that we gained in xfs_trans_dup() | |
1056 | */ | |
1057 | xfs_log_ticket_put(trans->t_ticket); | |
1058 | ||
1059 | ||
322ff6b8 NS |
1060 | /* |
1061 | * Reserve space in the log for th next transaction. | |
1062 | * This also pushes items in the "AIL", the list of logged items, | |
1063 | * out to disk if they are taking up space at the tail of the log | |
1064 | * that we want to use. This requires that either nothing be locked | |
1065 | * across this call, or that anything that is locked be logged in | |
1066 | * the prior and the next transactions. | |
1067 | */ | |
3d3c8b52 JL |
1068 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
1069 | error = xfs_trans_reserve(trans, &tres, 0, 0); | |
322ff6b8 NS |
1070 | /* |
1071 | * Ensure that the inode is in the new transaction and locked. | |
1072 | */ | |
1073 | if (error) | |
1074 | return error; | |
1075 | ||
ddc3415a | 1076 | xfs_trans_ijoin(trans, dp, 0); |
322ff6b8 NS |
1077 | return 0; |
1078 | } |