Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_mount.h" | |
30 | #include "xfs_error.h" | |
a844f451 | 31 | #include "xfs_da_btree.h" |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 LT |
37 | #include "xfs_dinode.h" |
38 | #include "xfs_inode.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
41 | #include "xfs_alloc.h" | |
1da177e4 | 42 | #include "xfs_bmap.h" |
1da177e4 | 43 | #include "xfs_quota.h" |
a844f451 | 44 | #include "xfs_trans_priv.h" |
1da177e4 | 45 | #include "xfs_trans_space.h" |
322ff6b8 | 46 | #include "xfs_inode_item.h" |
1da177e4 LT |
47 | |
48 | ||
49 | STATIC void xfs_trans_apply_sb_deltas(xfs_trans_t *); | |
50 | STATIC uint xfs_trans_count_vecs(xfs_trans_t *); | |
51 | STATIC void xfs_trans_fill_vecs(xfs_trans_t *, xfs_log_iovec_t *); | |
52 | STATIC void xfs_trans_uncommit(xfs_trans_t *, uint); | |
53 | STATIC void xfs_trans_committed(xfs_trans_t *, int); | |
54 | STATIC void xfs_trans_chunk_committed(xfs_log_item_chunk_t *, xfs_lsn_t, int); | |
55 | STATIC void xfs_trans_free(xfs_trans_t *); | |
56 | ||
8f794055 | 57 | kmem_zone_t *xfs_trans_zone; |
1da177e4 LT |
58 | |
59 | ||
8f794055 NS |
60 | /* |
61 | * Reservation functions here avoid a huge stack in xfs_trans_init | |
62 | * due to register overflow from temporaries in the calculations. | |
63 | */ | |
64 | ||
65 | STATIC uint | |
66 | xfs_calc_write_reservation(xfs_mount_t *mp) | |
67 | { | |
68 | return XFS_CALC_WRITE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
69 | } | |
70 | ||
71 | STATIC uint | |
72 | xfs_calc_itruncate_reservation(xfs_mount_t *mp) | |
73 | { | |
74 | return XFS_CALC_ITRUNCATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
75 | } | |
76 | ||
77 | STATIC uint | |
78 | xfs_calc_rename_reservation(xfs_mount_t *mp) | |
79 | { | |
80 | return XFS_CALC_RENAME_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
81 | } | |
82 | ||
83 | STATIC uint | |
84 | xfs_calc_link_reservation(xfs_mount_t *mp) | |
85 | { | |
2ddd5928 | 86 | return XFS_CALC_LINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); |
8f794055 NS |
87 | } |
88 | ||
89 | STATIC uint | |
90 | xfs_calc_remove_reservation(xfs_mount_t *mp) | |
91 | { | |
92 | return XFS_CALC_REMOVE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
93 | } | |
94 | ||
95 | STATIC uint | |
96 | xfs_calc_symlink_reservation(xfs_mount_t *mp) | |
97 | { | |
98 | return XFS_CALC_SYMLINK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
99 | } | |
100 | ||
101 | STATIC uint | |
102 | xfs_calc_create_reservation(xfs_mount_t *mp) | |
103 | { | |
104 | return XFS_CALC_CREATE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
105 | } | |
106 | ||
107 | STATIC uint | |
108 | xfs_calc_mkdir_reservation(xfs_mount_t *mp) | |
109 | { | |
110 | return XFS_CALC_MKDIR_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
111 | } | |
112 | ||
113 | STATIC uint | |
114 | xfs_calc_ifree_reservation(xfs_mount_t *mp) | |
115 | { | |
116 | return XFS_CALC_IFREE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
117 | } | |
118 | ||
119 | STATIC uint | |
120 | xfs_calc_ichange_reservation(xfs_mount_t *mp) | |
121 | { | |
122 | return XFS_CALC_ICHANGE_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
123 | } | |
124 | ||
125 | STATIC uint | |
126 | xfs_calc_growdata_reservation(xfs_mount_t *mp) | |
127 | { | |
128 | return XFS_CALC_GROWDATA_LOG_RES(mp); | |
129 | } | |
130 | ||
131 | STATIC uint | |
132 | xfs_calc_growrtalloc_reservation(xfs_mount_t *mp) | |
133 | { | |
134 | return XFS_CALC_GROWRTALLOC_LOG_RES(mp); | |
135 | } | |
136 | ||
137 | STATIC uint | |
138 | xfs_calc_growrtzero_reservation(xfs_mount_t *mp) | |
139 | { | |
140 | return XFS_CALC_GROWRTZERO_LOG_RES(mp); | |
141 | } | |
142 | ||
143 | STATIC uint | |
144 | xfs_calc_growrtfree_reservation(xfs_mount_t *mp) | |
145 | { | |
146 | return XFS_CALC_GROWRTFREE_LOG_RES(mp); | |
147 | } | |
148 | ||
149 | STATIC uint | |
150 | xfs_calc_swrite_reservation(xfs_mount_t *mp) | |
151 | { | |
152 | return XFS_CALC_SWRITE_LOG_RES(mp); | |
153 | } | |
154 | ||
155 | STATIC uint | |
156 | xfs_calc_writeid_reservation(xfs_mount_t *mp) | |
157 | { | |
158 | return XFS_CALC_WRITEID_LOG_RES(mp); | |
159 | } | |
160 | ||
161 | STATIC uint | |
162 | xfs_calc_addafork_reservation(xfs_mount_t *mp) | |
163 | { | |
164 | return XFS_CALC_ADDAFORK_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
165 | } | |
166 | ||
167 | STATIC uint | |
168 | xfs_calc_attrinval_reservation(xfs_mount_t *mp) | |
169 | { | |
170 | return XFS_CALC_ATTRINVAL_LOG_RES(mp); | |
171 | } | |
172 | ||
173 | STATIC uint | |
174 | xfs_calc_attrset_reservation(xfs_mount_t *mp) | |
175 | { | |
176 | return XFS_CALC_ATTRSET_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
177 | } | |
178 | ||
179 | STATIC uint | |
180 | xfs_calc_attrrm_reservation(xfs_mount_t *mp) | |
181 | { | |
182 | return XFS_CALC_ATTRRM_LOG_RES(mp) + XFS_DQUOT_LOGRES(mp); | |
183 | } | |
184 | ||
185 | STATIC uint | |
186 | xfs_calc_clear_agi_bucket_reservation(xfs_mount_t *mp) | |
187 | { | |
188 | return XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp); | |
189 | } | |
190 | ||
1da177e4 LT |
191 | /* |
192 | * Initialize the precomputed transaction reservation values | |
193 | * in the mount structure. | |
194 | */ | |
195 | void | |
196 | xfs_trans_init( | |
197 | xfs_mount_t *mp) | |
198 | { | |
199 | xfs_trans_reservations_t *resp; | |
200 | ||
201 | resp = &(mp->m_reservations); | |
8f794055 NS |
202 | resp->tr_write = xfs_calc_write_reservation(mp); |
203 | resp->tr_itruncate = xfs_calc_itruncate_reservation(mp); | |
204 | resp->tr_rename = xfs_calc_rename_reservation(mp); | |
205 | resp->tr_link = xfs_calc_link_reservation(mp); | |
206 | resp->tr_remove = xfs_calc_remove_reservation(mp); | |
207 | resp->tr_symlink = xfs_calc_symlink_reservation(mp); | |
208 | resp->tr_create = xfs_calc_create_reservation(mp); | |
209 | resp->tr_mkdir = xfs_calc_mkdir_reservation(mp); | |
210 | resp->tr_ifree = xfs_calc_ifree_reservation(mp); | |
211 | resp->tr_ichange = xfs_calc_ichange_reservation(mp); | |
212 | resp->tr_growdata = xfs_calc_growdata_reservation(mp); | |
213 | resp->tr_swrite = xfs_calc_swrite_reservation(mp); | |
214 | resp->tr_writeid = xfs_calc_writeid_reservation(mp); | |
215 | resp->tr_addafork = xfs_calc_addafork_reservation(mp); | |
216 | resp->tr_attrinval = xfs_calc_attrinval_reservation(mp); | |
217 | resp->tr_attrset = xfs_calc_attrset_reservation(mp); | |
218 | resp->tr_attrrm = xfs_calc_attrrm_reservation(mp); | |
219 | resp->tr_clearagi = xfs_calc_clear_agi_bucket_reservation(mp); | |
220 | resp->tr_growrtalloc = xfs_calc_growrtalloc_reservation(mp); | |
221 | resp->tr_growrtzero = xfs_calc_growrtzero_reservation(mp); | |
222 | resp->tr_growrtfree = xfs_calc_growrtfree_reservation(mp); | |
1da177e4 LT |
223 | } |
224 | ||
225 | /* | |
226 | * This routine is called to allocate a transaction structure. | |
227 | * The type parameter indicates the type of the transaction. These | |
228 | * are enumerated in xfs_trans.h. | |
229 | * | |
230 | * Dynamically allocate the transaction structure from the transaction | |
231 | * zone, initialize it, and return it to the caller. | |
232 | */ | |
233 | xfs_trans_t * | |
234 | xfs_trans_alloc( | |
235 | xfs_mount_t *mp, | |
236 | uint type) | |
237 | { | |
b267ce99 | 238 | xfs_wait_for_freeze(mp, SB_FREEZE_TRANS); |
34327e13 | 239 | return _xfs_trans_alloc(mp, type); |
1da177e4 LT |
240 | } |
241 | ||
242 | xfs_trans_t * | |
243 | _xfs_trans_alloc( | |
244 | xfs_mount_t *mp, | |
245 | uint type) | |
246 | { | |
247 | xfs_trans_t *tp; | |
248 | ||
34327e13 | 249 | atomic_inc(&mp->m_active_trans); |
1da177e4 | 250 | |
34327e13 | 251 | tp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); |
1da177e4 LT |
252 | tp->t_magic = XFS_TRANS_MAGIC; |
253 | tp->t_type = type; | |
254 | tp->t_mountp = mp; | |
255 | tp->t_items_free = XFS_LIC_NUM_SLOTS; | |
256 | tp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
39dab9d7 | 257 | xfs_lic_init(&(tp->t_items)); |
1da177e4 | 258 | XFS_LBC_INIT(&(tp->t_busy)); |
34327e13 | 259 | return tp; |
1da177e4 LT |
260 | } |
261 | ||
262 | /* | |
263 | * This is called to create a new transaction which will share the | |
264 | * permanent log reservation of the given transaction. The remaining | |
265 | * unused block and rt extent reservations are also inherited. This | |
266 | * implies that the original transaction is no longer allowed to allocate | |
267 | * blocks. Locks and log items, however, are no inherited. They must | |
268 | * be added to the new transaction explicitly. | |
269 | */ | |
270 | xfs_trans_t * | |
271 | xfs_trans_dup( | |
272 | xfs_trans_t *tp) | |
273 | { | |
274 | xfs_trans_t *ntp; | |
275 | ||
276 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); | |
277 | ||
278 | /* | |
279 | * Initialize the new transaction structure. | |
280 | */ | |
281 | ntp->t_magic = XFS_TRANS_MAGIC; | |
282 | ntp->t_type = tp->t_type; | |
283 | ntp->t_mountp = tp->t_mountp; | |
284 | ntp->t_items_free = XFS_LIC_NUM_SLOTS; | |
285 | ntp->t_busy_free = XFS_LBC_NUM_SLOTS; | |
39dab9d7 | 286 | xfs_lic_init(&(ntp->t_items)); |
1da177e4 LT |
287 | XFS_LBC_INIT(&(ntp->t_busy)); |
288 | ||
289 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 290 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 291 | |
1da177e4 | 292 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE); |
cc09c0dc | 293 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
1da177e4 LT |
294 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
295 | tp->t_blk_res = tp->t_blk_res_used; | |
296 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; | |
297 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 298 | ntp->t_pflags = tp->t_pflags; |
1da177e4 | 299 | |
7d095257 | 300 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
301 | |
302 | atomic_inc(&tp->t_mountp->m_active_trans); | |
303 | return ntp; | |
304 | } | |
305 | ||
306 | /* | |
307 | * This is called to reserve free disk blocks and log space for the | |
308 | * given transaction. This must be done before allocating any resources | |
309 | * within the transaction. | |
310 | * | |
311 | * This will return ENOSPC if there are not enough blocks available. | |
312 | * It will sleep waiting for available log space. | |
313 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
314 | * is used by long running transactions. If any one of the reservations | |
315 | * fails then they will all be backed out. | |
316 | * | |
317 | * This does not do quota reservations. That typically is done by the | |
318 | * caller afterwards. | |
319 | */ | |
320 | int | |
321 | xfs_trans_reserve( | |
322 | xfs_trans_t *tp, | |
323 | uint blocks, | |
324 | uint logspace, | |
325 | uint rtextents, | |
326 | uint flags, | |
327 | uint logcount) | |
328 | { | |
329 | int log_flags; | |
59c1b082 NS |
330 | int error = 0; |
331 | int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
1da177e4 LT |
332 | |
333 | /* Mark this thread as being in a transaction */ | |
59c1b082 | 334 | current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
335 | |
336 | /* | |
337 | * Attempt to reserve the needed disk blocks by decrementing | |
338 | * the number needed from the number available. This will | |
339 | * fail if the count would go below zero. | |
340 | */ | |
341 | if (blocks > 0) { | |
342 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
20f4ebf2 | 343 | -((int64_t)blocks), rsvd); |
1da177e4 | 344 | if (error != 0) { |
59c1b082 | 345 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
346 | return (XFS_ERROR(ENOSPC)); |
347 | } | |
348 | tp->t_blk_res += blocks; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Reserve the log space needed for this transaction. | |
353 | */ | |
354 | if (logspace > 0) { | |
355 | ASSERT((tp->t_log_res == 0) || (tp->t_log_res == logspace)); | |
356 | ASSERT((tp->t_log_count == 0) || | |
357 | (tp->t_log_count == logcount)); | |
358 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
359 | log_flags = XFS_LOG_PERM_RESERV; | |
360 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; | |
361 | } else { | |
362 | ASSERT(tp->t_ticket == NULL); | |
363 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
364 | log_flags = 0; | |
365 | } | |
366 | ||
367 | error = xfs_log_reserve(tp->t_mountp, logspace, logcount, | |
368 | &tp->t_ticket, | |
7e9c6396 | 369 | XFS_TRANSACTION, log_flags, tp->t_type); |
1da177e4 LT |
370 | if (error) { |
371 | goto undo_blocks; | |
372 | } | |
373 | tp->t_log_res = logspace; | |
374 | tp->t_log_count = logcount; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Attempt to reserve the needed realtime extents by decrementing | |
379 | * the number needed from the number available. This will | |
380 | * fail if the count would go below zero. | |
381 | */ | |
382 | if (rtextents > 0) { | |
383 | error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 384 | -((int64_t)rtextents), rsvd); |
1da177e4 LT |
385 | if (error) { |
386 | error = XFS_ERROR(ENOSPC); | |
387 | goto undo_log; | |
388 | } | |
389 | tp->t_rtx_res += rtextents; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | ||
394 | /* | |
395 | * Error cases jump to one of these labels to undo any | |
396 | * reservations which have already been performed. | |
397 | */ | |
398 | undo_log: | |
399 | if (logspace > 0) { | |
400 | if (flags & XFS_TRANS_PERM_LOG_RES) { | |
401 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
402 | } else { | |
403 | log_flags = 0; | |
404 | } | |
405 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, log_flags); | |
406 | tp->t_ticket = NULL; | |
407 | tp->t_log_res = 0; | |
408 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
409 | } | |
410 | ||
411 | undo_blocks: | |
412 | if (blocks > 0) { | |
413 | (void) xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS, | |
20f4ebf2 | 414 | (int64_t)blocks, rsvd); |
1da177e4 LT |
415 | tp->t_blk_res = 0; |
416 | } | |
417 | ||
59c1b082 | 418 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 | 419 | |
59c1b082 | 420 | return error; |
1da177e4 LT |
421 | } |
422 | ||
423 | ||
1da177e4 LT |
424 | /* |
425 | * Record the indicated change to the given field for application | |
426 | * to the file system's superblock when the transaction commits. | |
427 | * For now, just store the change in the transaction structure. | |
428 | * | |
429 | * Mark the transaction structure to indicate that the superblock | |
430 | * needs to be updated before committing. | |
92821e2b DC |
431 | * |
432 | * Because we may not be keeping track of allocated/free inodes and | |
433 | * used filesystem blocks in the superblock, we do not mark the | |
434 | * superblock dirty in this transaction if we modify these fields. | |
435 | * We still need to update the transaction deltas so that they get | |
436 | * applied to the incore superblock, but we don't want them to | |
437 | * cause the superblock to get locked and logged if these are the | |
438 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
439 | */ |
440 | void | |
441 | xfs_trans_mod_sb( | |
442 | xfs_trans_t *tp, | |
443 | uint field, | |
20f4ebf2 | 444 | int64_t delta) |
1da177e4 | 445 | { |
92821e2b DC |
446 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
447 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
448 | |
449 | switch (field) { | |
450 | case XFS_TRANS_SB_ICOUNT: | |
451 | tp->t_icount_delta += delta; | |
92821e2b DC |
452 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
453 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
454 | break; |
455 | case XFS_TRANS_SB_IFREE: | |
456 | tp->t_ifree_delta += delta; | |
92821e2b DC |
457 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
458 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
459 | break; |
460 | case XFS_TRANS_SB_FDBLOCKS: | |
461 | /* | |
462 | * Track the number of blocks allocated in the | |
463 | * transaction. Make sure it does not exceed the | |
464 | * number reserved. | |
465 | */ | |
466 | if (delta < 0) { | |
467 | tp->t_blk_res_used += (uint)-delta; | |
468 | ASSERT(tp->t_blk_res_used <= tp->t_blk_res); | |
469 | } | |
470 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
471 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
472 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
473 | break; |
474 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
475 | /* | |
476 | * The allocation has already been applied to the | |
477 | * in-core superblock's counter. This should only | |
478 | * be applied to the on-disk superblock. | |
479 | */ | |
480 | ASSERT(delta < 0); | |
481 | tp->t_res_fdblocks_delta += delta; | |
92821e2b DC |
482 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
483 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
484 | break; |
485 | case XFS_TRANS_SB_FREXTENTS: | |
486 | /* | |
487 | * Track the number of blocks allocated in the | |
488 | * transaction. Make sure it does not exceed the | |
489 | * number reserved. | |
490 | */ | |
491 | if (delta < 0) { | |
492 | tp->t_rtx_res_used += (uint)-delta; | |
493 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
494 | } | |
495 | tp->t_frextents_delta += delta; | |
496 | break; | |
497 | case XFS_TRANS_SB_RES_FREXTENTS: | |
498 | /* | |
499 | * The allocation has already been applied to the | |
c41564b5 | 500 | * in-core superblock's counter. This should only |
1da177e4 LT |
501 | * be applied to the on-disk superblock. |
502 | */ | |
503 | ASSERT(delta < 0); | |
504 | tp->t_res_frextents_delta += delta; | |
505 | break; | |
506 | case XFS_TRANS_SB_DBLOCKS: | |
507 | ASSERT(delta > 0); | |
508 | tp->t_dblocks_delta += delta; | |
509 | break; | |
510 | case XFS_TRANS_SB_AGCOUNT: | |
511 | ASSERT(delta > 0); | |
512 | tp->t_agcount_delta += delta; | |
513 | break; | |
514 | case XFS_TRANS_SB_IMAXPCT: | |
515 | tp->t_imaxpct_delta += delta; | |
516 | break; | |
517 | case XFS_TRANS_SB_REXTSIZE: | |
518 | tp->t_rextsize_delta += delta; | |
519 | break; | |
520 | case XFS_TRANS_SB_RBMBLOCKS: | |
521 | tp->t_rbmblocks_delta += delta; | |
522 | break; | |
523 | case XFS_TRANS_SB_RBLOCKS: | |
524 | tp->t_rblocks_delta += delta; | |
525 | break; | |
526 | case XFS_TRANS_SB_REXTENTS: | |
527 | tp->t_rextents_delta += delta; | |
528 | break; | |
529 | case XFS_TRANS_SB_REXTSLOG: | |
530 | tp->t_rextslog_delta += delta; | |
531 | break; | |
532 | default: | |
533 | ASSERT(0); | |
534 | return; | |
535 | } | |
536 | ||
210c6f1c | 537 | tp->t_flags |= flags; |
1da177e4 LT |
538 | } |
539 | ||
540 | /* | |
541 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
542 | * to bring the superblock buffer into the current transaction | |
543 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
544 | * | |
545 | * For now we just look at each field allowed to change and change | |
546 | * it if necessary. | |
547 | */ | |
548 | STATIC void | |
549 | xfs_trans_apply_sb_deltas( | |
550 | xfs_trans_t *tp) | |
551 | { | |
2bdf7cd0 | 552 | xfs_dsb_t *sbp; |
1da177e4 LT |
553 | xfs_buf_t *bp; |
554 | int whole = 0; | |
555 | ||
556 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
557 | sbp = XFS_BUF_TO_SBP(bp); | |
558 | ||
559 | /* | |
560 | * Check that superblock mods match the mods made to AGF counters. | |
561 | */ | |
562 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
563 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
564 | tp->t_ag_btree_delta)); | |
565 | ||
92821e2b DC |
566 | /* |
567 | * Only update the superblock counters if we are logging them | |
568 | */ | |
569 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 570 | if (tp->t_icount_delta) |
413d57c9 | 571 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 572 | if (tp->t_ifree_delta) |
413d57c9 | 573 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 574 | if (tp->t_fdblocks_delta) |
413d57c9 | 575 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 576 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 577 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
578 | } |
579 | ||
2bdf7cd0 | 580 | if (tp->t_frextents_delta) |
413d57c9 | 581 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 582 | if (tp->t_res_frextents_delta) |
413d57c9 | 583 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
584 | |
585 | if (tp->t_dblocks_delta) { | |
413d57c9 | 586 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
587 | whole = 1; |
588 | } | |
2bdf7cd0 | 589 | if (tp->t_agcount_delta) { |
413d57c9 | 590 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
591 | whole = 1; |
592 | } | |
2bdf7cd0 CH |
593 | if (tp->t_imaxpct_delta) { |
594 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
595 | whole = 1; |
596 | } | |
2bdf7cd0 | 597 | if (tp->t_rextsize_delta) { |
413d57c9 | 598 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
599 | whole = 1; |
600 | } | |
2bdf7cd0 | 601 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 602 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
603 | whole = 1; |
604 | } | |
2bdf7cd0 | 605 | if (tp->t_rblocks_delta) { |
413d57c9 | 606 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
607 | whole = 1; |
608 | } | |
2bdf7cd0 | 609 | if (tp->t_rextents_delta) { |
413d57c9 | 610 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
611 | whole = 1; |
612 | } | |
2bdf7cd0 CH |
613 | if (tp->t_rextslog_delta) { |
614 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
615 | whole = 1; |
616 | } | |
617 | ||
618 | if (whole) | |
619 | /* | |
c41564b5 | 620 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 621 | */ |
2bdf7cd0 | 622 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
623 | else |
624 | /* | |
625 | * Since all the modifiable fields are contiguous, we | |
626 | * can get away with this. | |
627 | */ | |
2bdf7cd0 CH |
628 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
629 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 630 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
631 | } |
632 | ||
633 | /* | |
45c34141 DC |
634 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
635 | * and apply superblock counter changes to the in-core superblock. The | |
636 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
637 | * applied to the in-core superblock. The idea is that that has already been | |
638 | * done. | |
1da177e4 LT |
639 | * |
640 | * This is done efficiently with a single call to xfs_mod_incore_sb_batch(). | |
45c34141 DC |
641 | * However, we have to ensure that we only modify each superblock field only |
642 | * once because the application of the delta values may not be atomic. That can | |
643 | * lead to ENOSPC races occurring if we have two separate modifcations of the | |
644 | * free space counter to put back the entire reservation and then take away | |
645 | * what we used. | |
646 | * | |
647 | * If we are not logging superblock counters, then the inode allocated/free and | |
648 | * used block counts are not updated in the on disk superblock. In this case, | |
649 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
650 | * still need to update the incore superblock with the changes. | |
1da177e4 | 651 | */ |
ba0f32d4 | 652 | STATIC void |
1da177e4 LT |
653 | xfs_trans_unreserve_and_mod_sb( |
654 | xfs_trans_t *tp) | |
655 | { | |
656 | xfs_mod_sb_t msb[14]; /* If you add cases, add entries */ | |
657 | xfs_mod_sb_t *msbp; | |
92821e2b | 658 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
659 | /* REFERENCED */ |
660 | int error; | |
661 | int rsvd; | |
45c34141 DC |
662 | int64_t blkdelta = 0; |
663 | int64_t rtxdelta = 0; | |
1da177e4 LT |
664 | |
665 | msbp = msb; | |
666 | rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
667 | ||
45c34141 DC |
668 | /* calculate free blocks delta */ |
669 | if (tp->t_blk_res > 0) | |
670 | blkdelta = tp->t_blk_res; | |
671 | ||
672 | if ((tp->t_fdblocks_delta != 0) && | |
673 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
674 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
675 | blkdelta += tp->t_fdblocks_delta; | |
676 | ||
677 | if (blkdelta != 0) { | |
1da177e4 | 678 | msbp->msb_field = XFS_SBS_FDBLOCKS; |
45c34141 | 679 | msbp->msb_delta = blkdelta; |
1da177e4 LT |
680 | msbp++; |
681 | } | |
682 | ||
45c34141 DC |
683 | /* calculate free realtime extents delta */ |
684 | if (tp->t_rtx_res > 0) | |
685 | rtxdelta = tp->t_rtx_res; | |
686 | ||
687 | if ((tp->t_frextents_delta != 0) && | |
688 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
689 | rtxdelta += tp->t_frextents_delta; | |
690 | ||
691 | if (rtxdelta != 0) { | |
1da177e4 | 692 | msbp->msb_field = XFS_SBS_FREXTENTS; |
45c34141 | 693 | msbp->msb_delta = rtxdelta; |
1da177e4 LT |
694 | msbp++; |
695 | } | |
696 | ||
45c34141 DC |
697 | /* apply remaining deltas */ |
698 | ||
92821e2b DC |
699 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
700 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
1da177e4 LT |
701 | if (tp->t_icount_delta != 0) { |
702 | msbp->msb_field = XFS_SBS_ICOUNT; | |
20f4ebf2 | 703 | msbp->msb_delta = tp->t_icount_delta; |
1da177e4 LT |
704 | msbp++; |
705 | } | |
706 | if (tp->t_ifree_delta != 0) { | |
707 | msbp->msb_field = XFS_SBS_IFREE; | |
20f4ebf2 | 708 | msbp->msb_delta = tp->t_ifree_delta; |
1da177e4 LT |
709 | msbp++; |
710 | } | |
92821e2b DC |
711 | } |
712 | ||
713 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) { | |
1da177e4 LT |
714 | if (tp->t_dblocks_delta != 0) { |
715 | msbp->msb_field = XFS_SBS_DBLOCKS; | |
20f4ebf2 | 716 | msbp->msb_delta = tp->t_dblocks_delta; |
1da177e4 LT |
717 | msbp++; |
718 | } | |
719 | if (tp->t_agcount_delta != 0) { | |
720 | msbp->msb_field = XFS_SBS_AGCOUNT; | |
20f4ebf2 | 721 | msbp->msb_delta = tp->t_agcount_delta; |
1da177e4 LT |
722 | msbp++; |
723 | } | |
724 | if (tp->t_imaxpct_delta != 0) { | |
725 | msbp->msb_field = XFS_SBS_IMAX_PCT; | |
20f4ebf2 | 726 | msbp->msb_delta = tp->t_imaxpct_delta; |
1da177e4 LT |
727 | msbp++; |
728 | } | |
729 | if (tp->t_rextsize_delta != 0) { | |
730 | msbp->msb_field = XFS_SBS_REXTSIZE; | |
20f4ebf2 | 731 | msbp->msb_delta = tp->t_rextsize_delta; |
1da177e4 LT |
732 | msbp++; |
733 | } | |
734 | if (tp->t_rbmblocks_delta != 0) { | |
735 | msbp->msb_field = XFS_SBS_RBMBLOCKS; | |
20f4ebf2 | 736 | msbp->msb_delta = tp->t_rbmblocks_delta; |
1da177e4 LT |
737 | msbp++; |
738 | } | |
739 | if (tp->t_rblocks_delta != 0) { | |
740 | msbp->msb_field = XFS_SBS_RBLOCKS; | |
20f4ebf2 | 741 | msbp->msb_delta = tp->t_rblocks_delta; |
1da177e4 LT |
742 | msbp++; |
743 | } | |
744 | if (tp->t_rextents_delta != 0) { | |
745 | msbp->msb_field = XFS_SBS_REXTENTS; | |
20f4ebf2 | 746 | msbp->msb_delta = tp->t_rextents_delta; |
1da177e4 LT |
747 | msbp++; |
748 | } | |
749 | if (tp->t_rextslog_delta != 0) { | |
750 | msbp->msb_field = XFS_SBS_REXTSLOG; | |
20f4ebf2 | 751 | msbp->msb_delta = tp->t_rextslog_delta; |
1da177e4 LT |
752 | msbp++; |
753 | } | |
754 | } | |
755 | ||
756 | /* | |
757 | * If we need to change anything, do it. | |
758 | */ | |
759 | if (msbp > msb) { | |
760 | error = xfs_mod_incore_sb_batch(tp->t_mountp, msb, | |
761 | (uint)(msbp - msb), rsvd); | |
762 | ASSERT(error == 0); | |
763 | } | |
764 | } | |
765 | ||
766 | ||
767 | /* | |
768 | * xfs_trans_commit | |
769 | * | |
770 | * Commit the given transaction to the log a/synchronously. | |
771 | * | |
772 | * XFS disk error handling mechanism is not based on a typical | |
773 | * transaction abort mechanism. Logically after the filesystem | |
774 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
775 | * be durable - ie. committed to disk - because some metadata might | |
776 | * be inconsistent. In such cases, this returns an error, and the | |
777 | * caller may assume that all locked objects joined to the transaction | |
778 | * have already been unlocked as if the commit had succeeded. | |
779 | * Do not reference the transaction structure after this call. | |
780 | */ | |
781 | /*ARGSUSED*/ | |
782 | int | |
f538d4da | 783 | _xfs_trans_commit( |
1da177e4 LT |
784 | xfs_trans_t *tp, |
785 | uint flags, | |
f538d4da | 786 | int *log_flushed) |
1da177e4 LT |
787 | { |
788 | xfs_log_iovec_t *log_vector; | |
789 | int nvec; | |
790 | xfs_mount_t *mp; | |
791 | xfs_lsn_t commit_lsn; | |
792 | /* REFERENCED */ | |
793 | int error; | |
794 | int log_flags; | |
795 | int sync; | |
796 | #define XFS_TRANS_LOGVEC_COUNT 16 | |
797 | xfs_log_iovec_t log_vector_fast[XFS_TRANS_LOGVEC_COUNT]; | |
1da177e4 LT |
798 | void *commit_iclog; |
799 | int shutdown; | |
800 | ||
801 | commit_lsn = -1; | |
802 | ||
803 | /* | |
804 | * Determine whether this commit is releasing a permanent | |
805 | * log reservation or not. | |
806 | */ | |
807 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
808 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
809 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
810 | } else { | |
811 | log_flags = 0; | |
812 | } | |
813 | mp = tp->t_mountp; | |
814 | ||
815 | /* | |
816 | * If there is nothing to be logged by the transaction, | |
817 | * then unlock all of the items associated with the | |
818 | * transaction and free the transaction structure. | |
819 | * Also make sure to return any reserved blocks to | |
820 | * the free pool. | |
821 | */ | |
822 | shut_us_down: | |
823 | shutdown = XFS_FORCED_SHUTDOWN(mp) ? EIO : 0; | |
824 | if (!(tp->t_flags & XFS_TRANS_DIRTY) || shutdown) { | |
825 | xfs_trans_unreserve_and_mod_sb(tp); | |
826 | /* | |
827 | * It is indeed possible for the transaction to be | |
828 | * not dirty but the dqinfo portion to be. All that | |
829 | * means is that we have some (non-persistent) quota | |
830 | * reservations that need to be unreserved. | |
831 | */ | |
7d095257 | 832 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
833 | if (tp->t_ticket) { |
834 | commit_lsn = xfs_log_done(mp, tp->t_ticket, | |
835 | NULL, log_flags); | |
836 | if (commit_lsn == -1 && !shutdown) | |
837 | shutdown = XFS_ERROR(EIO); | |
838 | } | |
59c1b082 | 839 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
840 | xfs_trans_free_items(tp, shutdown? XFS_TRANS_ABORT : 0); |
841 | xfs_trans_free_busy(tp); | |
842 | xfs_trans_free(tp); | |
843 | XFS_STATS_INC(xs_trans_empty); | |
1da177e4 LT |
844 | return (shutdown); |
845 | } | |
1da177e4 | 846 | ASSERT(tp->t_ticket != NULL); |
1da177e4 LT |
847 | |
848 | /* | |
849 | * If we need to update the superblock, then do it now. | |
850 | */ | |
7d095257 | 851 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) |
1da177e4 | 852 | xfs_trans_apply_sb_deltas(tp); |
7d095257 | 853 | xfs_trans_apply_dquot_deltas(tp); |
1da177e4 LT |
854 | |
855 | /* | |
856 | * Ask each log item how many log_vector entries it will | |
857 | * need so we can figure out how many to allocate. | |
858 | * Try to avoid the kmem_alloc() call in the common case | |
859 | * by using a vector from the stack when it fits. | |
860 | */ | |
861 | nvec = xfs_trans_count_vecs(tp); | |
1da177e4 | 862 | if (nvec == 0) { |
7d04a335 | 863 | xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR); |
1da177e4 | 864 | goto shut_us_down; |
cfcbbbd0 | 865 | } else if (nvec <= XFS_TRANS_LOGVEC_COUNT) { |
1da177e4 LT |
866 | log_vector = log_vector_fast; |
867 | } else { | |
868 | log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec * | |
869 | sizeof(xfs_log_iovec_t), | |
870 | KM_SLEEP); | |
871 | } | |
872 | ||
873 | /* | |
874 | * Fill in the log_vector and pin the logged items, and | |
875 | * then write the transaction to the log. | |
876 | */ | |
877 | xfs_trans_fill_vecs(tp, log_vector); | |
878 | ||
cfcbbbd0 | 879 | error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn)); |
1da177e4 | 880 | |
1da177e4 | 881 | /* |
cfcbbbd0 NS |
882 | * The transaction is committed incore here, and can go out to disk |
883 | * at any time after this call. However, all the items associated | |
884 | * with the transaction are still locked and pinned in memory. | |
1da177e4 LT |
885 | */ |
886 | commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags); | |
1da177e4 LT |
887 | |
888 | tp->t_commit_lsn = commit_lsn; | |
889 | if (nvec > XFS_TRANS_LOGVEC_COUNT) { | |
f0e2d93c | 890 | kmem_free(log_vector); |
1da177e4 LT |
891 | } |
892 | ||
1da177e4 LT |
893 | /* |
894 | * If we got a log write error. Unpin the logitems that we | |
895 | * had pinned, clean up, free trans structure, and return error. | |
896 | */ | |
897 | if (error || commit_lsn == -1) { | |
59c1b082 | 898 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
899 | xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT); |
900 | return XFS_ERROR(EIO); | |
901 | } | |
902 | ||
903 | /* | |
904 | * Once the transaction has committed, unused | |
905 | * reservations need to be released and changes to | |
906 | * the superblock need to be reflected in the in-core | |
907 | * version. Do that now. | |
908 | */ | |
909 | xfs_trans_unreserve_and_mod_sb(tp); | |
910 | ||
911 | sync = tp->t_flags & XFS_TRANS_SYNC; | |
912 | ||
913 | /* | |
914 | * Tell the LM to call the transaction completion routine | |
915 | * when the log write with LSN commit_lsn completes (e.g. | |
916 | * when the transaction commit really hits the on-disk log). | |
917 | * After this call we cannot reference tp, because the call | |
918 | * can happen at any time and the call will free the transaction | |
919 | * structure pointed to by tp. The only case where we call | |
920 | * the completion routine (xfs_trans_committed) directly is | |
921 | * if the log is turned off on a debug kernel or we're | |
922 | * running in simulation mode (the log is explicitly turned | |
923 | * off). | |
924 | */ | |
925 | tp->t_logcb.cb_func = (void(*)(void*, int))xfs_trans_committed; | |
926 | tp->t_logcb.cb_arg = tp; | |
927 | ||
928 | /* | |
929 | * We need to pass the iclog buffer which was used for the | |
930 | * transaction commit record into this function, and attach | |
931 | * the callback to it. The callback must be attached before | |
932 | * the items are unlocked to avoid racing with other threads | |
933 | * waiting for an item to unlock. | |
934 | */ | |
935 | shutdown = xfs_log_notify(mp, commit_iclog, &(tp->t_logcb)); | |
936 | ||
937 | /* | |
938 | * Mark this thread as no longer being in a transaction | |
939 | */ | |
59c1b082 | 940 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
941 | |
942 | /* | |
943 | * Once all the items of the transaction have been copied | |
944 | * to the in core log and the callback is attached, the | |
945 | * items can be unlocked. | |
946 | * | |
947 | * This will free descriptors pointing to items which were | |
948 | * not logged since there is nothing more to do with them. | |
949 | * For items which were logged, we will keep pointers to them | |
950 | * so they can be unpinned after the transaction commits to disk. | |
951 | * This will also stamp each modified meta-data item with | |
952 | * the commit lsn of this transaction for dependency tracking | |
953 | * purposes. | |
954 | */ | |
955 | xfs_trans_unlock_items(tp, commit_lsn); | |
956 | ||
957 | /* | |
958 | * If we detected a log error earlier, finish committing | |
959 | * the transaction now (unpin log items, etc). | |
960 | * | |
961 | * Order is critical here, to avoid using the transaction | |
962 | * pointer after its been freed (by xfs_trans_committed | |
963 | * either here now, or as a callback). We cannot do this | |
964 | * step inside xfs_log_notify as was done earlier because | |
965 | * of this issue. | |
966 | */ | |
967 | if (shutdown) | |
968 | xfs_trans_committed(tp, XFS_LI_ABORTED); | |
969 | ||
970 | /* | |
971 | * Now that the xfs_trans_committed callback has been attached, | |
972 | * and the items are released we can finally allow the iclog to | |
973 | * go to disk. | |
974 | */ | |
975 | error = xfs_log_release_iclog(mp, commit_iclog); | |
976 | ||
977 | /* | |
978 | * If the transaction needs to be synchronous, then force the | |
979 | * log out now and wait for it. | |
980 | */ | |
981 | if (sync) { | |
f538d4da CH |
982 | if (!error) { |
983 | error = _xfs_log_force(mp, commit_lsn, | |
984 | XFS_LOG_FORCE | XFS_LOG_SYNC, | |
985 | log_flushed); | |
986 | } | |
1da177e4 LT |
987 | XFS_STATS_INC(xs_trans_sync); |
988 | } else { | |
989 | XFS_STATS_INC(xs_trans_async); | |
990 | } | |
991 | ||
992 | return (error); | |
993 | } | |
994 | ||
995 | ||
996 | /* | |
997 | * Total up the number of log iovecs needed to commit this | |
998 | * transaction. The transaction itself needs one for the | |
999 | * transaction header. Ask each dirty item in turn how many | |
1000 | * it needs to get the total. | |
1001 | */ | |
1002 | STATIC uint | |
1003 | xfs_trans_count_vecs( | |
1004 | xfs_trans_t *tp) | |
1005 | { | |
1006 | int nvecs; | |
1007 | xfs_log_item_desc_t *lidp; | |
1008 | ||
1009 | nvecs = 1; | |
1010 | lidp = xfs_trans_first_item(tp); | |
1011 | ASSERT(lidp != NULL); | |
1012 | ||
1013 | /* In the non-debug case we need to start bailing out if we | |
1014 | * didn't find a log_item here, return zero and let trans_commit | |
1015 | * deal with it. | |
1016 | */ | |
1017 | if (lidp == NULL) | |
1018 | return 0; | |
1019 | ||
1020 | while (lidp != NULL) { | |
1021 | /* | |
1022 | * Skip items which aren't dirty in this transaction. | |
1023 | */ | |
1024 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
1025 | lidp = xfs_trans_next_item(tp, lidp); | |
1026 | continue; | |
1027 | } | |
1028 | lidp->lid_size = IOP_SIZE(lidp->lid_item); | |
1029 | nvecs += lidp->lid_size; | |
1030 | lidp = xfs_trans_next_item(tp, lidp); | |
1031 | } | |
1032 | ||
1033 | return nvecs; | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Called from the trans_commit code when we notice that | |
1038 | * the filesystem is in the middle of a forced shutdown. | |
1039 | */ | |
1040 | STATIC void | |
1041 | xfs_trans_uncommit( | |
1042 | xfs_trans_t *tp, | |
1043 | uint flags) | |
1044 | { | |
1045 | xfs_log_item_desc_t *lidp; | |
1046 | ||
1047 | for (lidp = xfs_trans_first_item(tp); | |
1048 | lidp != NULL; | |
1049 | lidp = xfs_trans_next_item(tp, lidp)) { | |
1050 | /* | |
1051 | * Unpin all but those that aren't dirty. | |
1052 | */ | |
1053 | if (lidp->lid_flags & XFS_LID_DIRTY) | |
1054 | IOP_UNPIN_REMOVE(lidp->lid_item, tp); | |
1055 | } | |
1056 | ||
1057 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1058 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
1059 | |
1060 | xfs_trans_free_items(tp, flags); | |
1061 | xfs_trans_free_busy(tp); | |
1062 | xfs_trans_free(tp); | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Fill in the vector with pointers to data to be logged | |
1067 | * by this transaction. The transaction header takes | |
1068 | * the first vector, and then each dirty item takes the | |
1069 | * number of vectors it indicated it needed in xfs_trans_count_vecs(). | |
1070 | * | |
1071 | * As each item fills in the entries it needs, also pin the item | |
1072 | * so that it cannot be flushed out until the log write completes. | |
1073 | */ | |
1074 | STATIC void | |
1075 | xfs_trans_fill_vecs( | |
1076 | xfs_trans_t *tp, | |
1077 | xfs_log_iovec_t *log_vector) | |
1078 | { | |
1079 | xfs_log_item_desc_t *lidp; | |
1080 | xfs_log_iovec_t *vecp; | |
1081 | uint nitems; | |
1082 | ||
1083 | /* | |
1084 | * Skip over the entry for the transaction header, we'll | |
1085 | * fill that in at the end. | |
1086 | */ | |
1087 | vecp = log_vector + 1; /* pointer arithmetic */ | |
1088 | ||
1089 | nitems = 0; | |
1090 | lidp = xfs_trans_first_item(tp); | |
1091 | ASSERT(lidp != NULL); | |
1092 | while (lidp != NULL) { | |
1093 | /* | |
1094 | * Skip items which aren't dirty in this transaction. | |
1095 | */ | |
1096 | if (!(lidp->lid_flags & XFS_LID_DIRTY)) { | |
1097 | lidp = xfs_trans_next_item(tp, lidp); | |
1098 | continue; | |
1099 | } | |
1100 | /* | |
1101 | * The item may be marked dirty but not log anything. | |
1102 | * This can be used to get called when a transaction | |
1103 | * is committed. | |
1104 | */ | |
1105 | if (lidp->lid_size) { | |
1106 | nitems++; | |
1107 | } | |
1108 | IOP_FORMAT(lidp->lid_item, vecp); | |
1109 | vecp += lidp->lid_size; /* pointer arithmetic */ | |
1110 | IOP_PIN(lidp->lid_item); | |
1111 | lidp = xfs_trans_next_item(tp, lidp); | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * Now that we've counted the number of items in this | |
1116 | * transaction, fill in the transaction header. | |
1117 | */ | |
1118 | tp->t_header.th_magic = XFS_TRANS_HEADER_MAGIC; | |
1119 | tp->t_header.th_type = tp->t_type; | |
1120 | tp->t_header.th_num_items = nitems; | |
1121 | log_vector->i_addr = (xfs_caddr_t)&tp->t_header; | |
1122 | log_vector->i_len = sizeof(xfs_trans_header_t); | |
7e9c6396 | 1123 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_TRANSHDR); |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | ||
1127 | /* | |
1128 | * Unlock all of the transaction's items and free the transaction. | |
1129 | * The transaction must not have modified any of its items, because | |
1130 | * there is no way to restore them to their previous state. | |
1131 | * | |
1132 | * If the transaction has made a log reservation, make sure to release | |
1133 | * it as well. | |
1134 | */ | |
1135 | void | |
1136 | xfs_trans_cancel( | |
1137 | xfs_trans_t *tp, | |
1138 | int flags) | |
1139 | { | |
1140 | int log_flags; | |
1141 | #ifdef DEBUG | |
1142 | xfs_log_item_chunk_t *licp; | |
1143 | xfs_log_item_desc_t *lidp; | |
1144 | xfs_log_item_t *lip; | |
1145 | int i; | |
1146 | #endif | |
0733af21 | 1147 | xfs_mount_t *mp = tp->t_mountp; |
1da177e4 LT |
1148 | |
1149 | /* | |
1150 | * See if the caller is being too lazy to figure out if | |
1151 | * the transaction really needs an abort. | |
1152 | */ | |
1153 | if ((flags & XFS_TRANS_ABORT) && !(tp->t_flags & XFS_TRANS_DIRTY)) | |
1154 | flags &= ~XFS_TRANS_ABORT; | |
1155 | /* | |
1156 | * See if the caller is relying on us to shut down the | |
1157 | * filesystem. This happens in paths where we detect | |
1158 | * corruption and decide to give up. | |
1159 | */ | |
60a204f0 | 1160 | if ((tp->t_flags & XFS_TRANS_DIRTY) && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1161 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1162 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1163 | } |
1da177e4 LT |
1164 | #ifdef DEBUG |
1165 | if (!(flags & XFS_TRANS_ABORT)) { | |
1166 | licp = &(tp->t_items); | |
1167 | while (licp != NULL) { | |
1168 | lidp = licp->lic_descs; | |
1169 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
39dab9d7 | 1170 | if (xfs_lic_isfree(licp, i)) { |
1da177e4 LT |
1171 | continue; |
1172 | } | |
1173 | ||
1174 | lip = lidp->lid_item; | |
0733af21 | 1175 | if (!XFS_FORCED_SHUTDOWN(mp)) |
1da177e4 LT |
1176 | ASSERT(!(lip->li_type == XFS_LI_EFD)); |
1177 | } | |
1178 | licp = licp->lic_next; | |
1179 | } | |
1180 | } | |
1181 | #endif | |
1182 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1183 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 LT |
1184 | |
1185 | if (tp->t_ticket) { | |
1186 | if (flags & XFS_TRANS_RELEASE_LOG_RES) { | |
1187 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1188 | log_flags = XFS_LOG_REL_PERM_RESERV; | |
1189 | } else { | |
1190 | log_flags = 0; | |
1191 | } | |
0733af21 | 1192 | xfs_log_done(mp, tp->t_ticket, NULL, log_flags); |
1da177e4 LT |
1193 | } |
1194 | ||
1195 | /* mark this thread as no longer being in a transaction */ | |
59c1b082 | 1196 | current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); |
1da177e4 LT |
1197 | |
1198 | xfs_trans_free_items(tp, flags); | |
1199 | xfs_trans_free_busy(tp); | |
1200 | xfs_trans_free(tp); | |
1201 | } | |
1202 | ||
1203 | ||
1204 | /* | |
1205 | * Free the transaction structure. If there is more clean up | |
1206 | * to do when the structure is freed, add it here. | |
1207 | */ | |
1208 | STATIC void | |
1209 | xfs_trans_free( | |
1210 | xfs_trans_t *tp) | |
1211 | { | |
1212 | atomic_dec(&tp->t_mountp->m_active_trans); | |
7d095257 | 1213 | xfs_trans_free_dqinfo(tp); |
1da177e4 LT |
1214 | kmem_zone_free(xfs_trans_zone, tp); |
1215 | } | |
1216 | ||
322ff6b8 NS |
1217 | /* |
1218 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1219 | * the next: permanent transactions are only flushed out when | |
1220 | * committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon | |
1221 | * as possible to let chunks of it go to the log. So we commit the | |
1222 | * chunk we've been working on and get a new transaction to continue. | |
1223 | */ | |
1224 | int | |
1225 | xfs_trans_roll( | |
1226 | struct xfs_trans **tpp, | |
1227 | struct xfs_inode *dp) | |
1228 | { | |
1229 | struct xfs_trans *trans; | |
1230 | unsigned int logres, count; | |
1231 | int error; | |
1232 | ||
1233 | /* | |
1234 | * Ensure that the inode is always logged. | |
1235 | */ | |
1236 | trans = *tpp; | |
1237 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); | |
1238 | ||
1239 | /* | |
1240 | * Copy the critical parameters from one trans to the next. | |
1241 | */ | |
1242 | logres = trans->t_log_res; | |
1243 | count = trans->t_log_count; | |
1244 | *tpp = xfs_trans_dup(trans); | |
1245 | ||
1246 | /* | |
1247 | * Commit the current transaction. | |
1248 | * If this commit failed, then it'd just unlock those items that | |
1249 | * are not marked ihold. That also means that a filesystem shutdown | |
1250 | * is in progress. The caller takes the responsibility to cancel | |
1251 | * the duplicate transaction that gets returned. | |
1252 | */ | |
1253 | error = xfs_trans_commit(trans, 0); | |
1254 | if (error) | |
1255 | return (error); | |
1256 | ||
1257 | trans = *tpp; | |
1258 | ||
cc09c0dc DC |
1259 | /* |
1260 | * transaction commit worked ok so we can drop the extra ticket | |
1261 | * reference that we gained in xfs_trans_dup() | |
1262 | */ | |
1263 | xfs_log_ticket_put(trans->t_ticket); | |
1264 | ||
1265 | ||
322ff6b8 NS |
1266 | /* |
1267 | * Reserve space in the log for th next transaction. | |
1268 | * This also pushes items in the "AIL", the list of logged items, | |
1269 | * out to disk if they are taking up space at the tail of the log | |
1270 | * that we want to use. This requires that either nothing be locked | |
1271 | * across this call, or that anything that is locked be logged in | |
1272 | * the prior and the next transactions. | |
1273 | */ | |
1274 | error = xfs_trans_reserve(trans, 0, logres, 0, | |
1275 | XFS_TRANS_PERM_LOG_RES, count); | |
1276 | /* | |
1277 | * Ensure that the inode is in the new transaction and locked. | |
1278 | */ | |
1279 | if (error) | |
1280 | return error; | |
1281 | ||
1282 | xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); | |
1283 | xfs_trans_ihold(trans, dp); | |
1284 | return 0; | |
1285 | } | |
1da177e4 LT |
1286 | |
1287 | /* | |
1288 | * THIS SHOULD BE REWRITTEN TO USE xfs_trans_next_item(). | |
1289 | * | |
1290 | * This is typically called by the LM when a transaction has been fully | |
1291 | * committed to disk. It needs to unpin the items which have | |
1292 | * been logged by the transaction and update their positions | |
1293 | * in the AIL if necessary. | |
1294 | * This also gets called when the transactions didn't get written out | |
1295 | * because of an I/O error. Abortflag & XFS_LI_ABORTED is set then. | |
1296 | * | |
1297 | * Call xfs_trans_chunk_committed() to process the items in | |
1298 | * each chunk. | |
1299 | */ | |
1300 | STATIC void | |
1301 | xfs_trans_committed( | |
1302 | xfs_trans_t *tp, | |
1303 | int abortflag) | |
1304 | { | |
1305 | xfs_log_item_chunk_t *licp; | |
1306 | xfs_log_item_chunk_t *next_licp; | |
1307 | xfs_log_busy_chunk_t *lbcp; | |
1308 | xfs_log_busy_slot_t *lbsp; | |
1309 | int i; | |
1310 | ||
1311 | /* | |
1312 | * Call the transaction's completion callback if there | |
1313 | * is one. | |
1314 | */ | |
1315 | if (tp->t_callback != NULL) { | |
1316 | tp->t_callback(tp, tp->t_callarg); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Special case the chunk embedded in the transaction. | |
1321 | */ | |
1322 | licp = &(tp->t_items); | |
39dab9d7 | 1323 | if (!(xfs_lic_are_all_free(licp))) { |
1da177e4 LT |
1324 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * Process the items in each chunk in turn. | |
1329 | */ | |
1330 | licp = licp->lic_next; | |
1331 | while (licp != NULL) { | |
39dab9d7 | 1332 | ASSERT(!xfs_lic_are_all_free(licp)); |
1da177e4 LT |
1333 | xfs_trans_chunk_committed(licp, tp->t_lsn, abortflag); |
1334 | next_licp = licp->lic_next; | |
f0e2d93c | 1335 | kmem_free(licp); |
1da177e4 LT |
1336 | licp = next_licp; |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * Clear all the per-AG busy list items listed in this transaction | |
1341 | */ | |
1342 | lbcp = &tp->t_busy; | |
1343 | while (lbcp != NULL) { | |
1344 | for (i = 0, lbsp = lbcp->lbc_busy; i < lbcp->lbc_unused; i++, lbsp++) { | |
1345 | if (!XFS_LBC_ISFREE(lbcp, i)) { | |
1346 | xfs_alloc_clear_busy(tp, lbsp->lbc_ag, | |
1347 | lbsp->lbc_idx); | |
1348 | } | |
1349 | } | |
1350 | lbcp = lbcp->lbc_next; | |
1351 | } | |
1352 | xfs_trans_free_busy(tp); | |
1353 | ||
1354 | /* | |
1355 | * That's it for the transaction structure. Free it. | |
1356 | */ | |
1357 | xfs_trans_free(tp); | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * This is called to perform the commit processing for each | |
1362 | * item described by the given chunk. | |
1363 | * | |
1364 | * The commit processing consists of unlocking items which were | |
1365 | * held locked with the SYNC_UNLOCK attribute, calling the committed | |
1366 | * routine of each logged item, updating the item's position in the AIL | |
1367 | * if necessary, and unpinning each item. If the committed routine | |
1368 | * returns -1, then do nothing further with the item because it | |
1369 | * may have been freed. | |
1370 | * | |
1371 | * Since items are unlocked when they are copied to the incore | |
1372 | * log, it is possible for two transactions to be completing | |
1373 | * and manipulating the same item simultaneously. The AIL lock | |
1374 | * will protect the lsn field of each item. The value of this | |
1375 | * field can never go backwards. | |
1376 | * | |
1377 | * We unpin the items after repositioning them in the AIL, because | |
1378 | * otherwise they could be immediately flushed and we'd have to race | |
1379 | * with the flusher trying to pull the item from the AIL as we add it. | |
1380 | */ | |
1381 | STATIC void | |
1382 | xfs_trans_chunk_committed( | |
1383 | xfs_log_item_chunk_t *licp, | |
1384 | xfs_lsn_t lsn, | |
1385 | int aborted) | |
1386 | { | |
1387 | xfs_log_item_desc_t *lidp; | |
1388 | xfs_log_item_t *lip; | |
1389 | xfs_lsn_t item_lsn; | |
1da177e4 | 1390 | int i; |
1da177e4 LT |
1391 | |
1392 | lidp = licp->lic_descs; | |
1393 | for (i = 0; i < licp->lic_unused; i++, lidp++) { | |
fc1829f3 DC |
1394 | struct xfs_ail *ailp; |
1395 | ||
39dab9d7 | 1396 | if (xfs_lic_isfree(licp, i)) { |
1da177e4 LT |
1397 | continue; |
1398 | } | |
1399 | ||
1400 | lip = lidp->lid_item; | |
1401 | if (aborted) | |
1402 | lip->li_flags |= XFS_LI_ABORTED; | |
1403 | ||
1404 | /* | |
1405 | * Send in the ABORTED flag to the COMMITTED routine | |
1406 | * so that it knows whether the transaction was aborted | |
1407 | * or not. | |
1408 | */ | |
1409 | item_lsn = IOP_COMMITTED(lip, lsn); | |
1410 | ||
1411 | /* | |
1412 | * If the committed routine returns -1, make | |
1413 | * no more references to the item. | |
1414 | */ | |
1415 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) { | |
1416 | continue; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * If the returned lsn is greater than what it | |
1421 | * contained before, update the location of the | |
1422 | * item in the AIL. If it is not, then do nothing. | |
1423 | * Items can never move backwards in the AIL. | |
1424 | * | |
1425 | * While the new lsn should usually be greater, it | |
1426 | * is possible that a later transaction completing | |
1427 | * simultaneously with an earlier one using the | |
1428 | * same item could complete first with a higher lsn. | |
1429 | * This would cause the earlier transaction to fail | |
1430 | * the test below. | |
1431 | */ | |
fc1829f3 DC |
1432 | ailp = lip->li_ailp; |
1433 | spin_lock(&ailp->xa_lock); | |
1da177e4 LT |
1434 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { |
1435 | /* | |
1436 | * This will set the item's lsn to item_lsn | |
1437 | * and update the position of the item in | |
1438 | * the AIL. | |
1439 | * | |
783a2f65 | 1440 | * xfs_trans_ail_update() drops the AIL lock. |
1da177e4 | 1441 | */ |
783a2f65 | 1442 | xfs_trans_ail_update(ailp, lip, item_lsn); |
1da177e4 | 1443 | } else { |
fc1829f3 | 1444 | spin_unlock(&ailp->xa_lock); |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | /* | |
1448 | * Now that we've repositioned the item in the AIL, | |
1449 | * unpin it so it can be flushed. Pass information | |
1450 | * about buffer stale state down from the log item | |
1451 | * flags, if anyone else stales the buffer we do not | |
1452 | * want to pay any attention to it. | |
1453 | */ | |
1454 | IOP_UNPIN(lip, lidp->lid_flags & XFS_LID_BUF_STALE); | |
1455 | } | |
1456 | } |