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0b61f8a4 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
7b718769 | 3 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
e98c414f | 4 | * Copyright (C) 2010 Red Hat, Inc. |
7b718769 | 5 | * All Rights Reserved. |
1da177e4 | 6 | */ |
1da177e4 | 7 | #include "xfs.h" |
a844f451 | 8 | #include "xfs_fs.h" |
70a9883c | 9 | #include "xfs_shared.h" |
239880ef DC |
10 | #include "xfs_format.h" |
11 | #include "xfs_log_format.h" | |
12 | #include "xfs_trans_resv.h" | |
1da177e4 | 13 | #include "xfs_mount.h" |
efc27b52 | 14 | #include "xfs_extent_busy.h" |
1da177e4 | 15 | #include "xfs_quota.h" |
239880ef | 16 | #include "xfs_trans.h" |
a844f451 | 17 | #include "xfs_trans_priv.h" |
239880ef | 18 | #include "xfs_log.h" |
ed3b4d6c | 19 | #include "xfs_trace.h" |
a4fbe6ab | 20 | #include "xfs_error.h" |
f8f2835a | 21 | #include "xfs_defer.h" |
1da177e4 | 22 | |
8f794055 | 23 | kmem_zone_t *xfs_trans_zone; |
1da177e4 | 24 | |
b872af2c DW |
25 | #if defined(CONFIG_TRACEPOINTS) |
26 | static void | |
27 | xfs_trans_trace_reservations( | |
28 | struct xfs_mount *mp) | |
29 | { | |
30 | struct xfs_trans_res resv; | |
31 | struct xfs_trans_res *res; | |
32 | struct xfs_trans_res *end_res; | |
33 | int i; | |
34 | ||
35 | res = (struct xfs_trans_res *)M_RES(mp); | |
36 | end_res = (struct xfs_trans_res *)(M_RES(mp) + 1); | |
37 | for (i = 0; res < end_res; i++, res++) | |
38 | trace_xfs_trans_resv_calc(mp, i, res); | |
39 | xfs_log_get_max_trans_res(mp, &resv); | |
40 | trace_xfs_trans_resv_calc(mp, -1, &resv); | |
41 | } | |
42 | #else | |
43 | # define xfs_trans_trace_reservations(mp) | |
44 | #endif | |
45 | ||
1da177e4 LT |
46 | /* |
47 | * Initialize the precomputed transaction reservation values | |
48 | * in the mount structure. | |
49 | */ | |
50 | void | |
51 | xfs_trans_init( | |
025101dc | 52 | struct xfs_mount *mp) |
1da177e4 | 53 | { |
3d3c8b52 | 54 | xfs_trans_resv_calc(mp, M_RES(mp)); |
b872af2c | 55 | xfs_trans_trace_reservations(mp); |
1da177e4 LT |
56 | } |
57 | ||
b1c1b5b6 DC |
58 | /* |
59 | * Free the transaction structure. If there is more clean up | |
60 | * to do when the structure is freed, add it here. | |
61 | */ | |
62 | STATIC void | |
63 | xfs_trans_free( | |
ed3b4d6c | 64 | struct xfs_trans *tp) |
b1c1b5b6 | 65 | { |
4ecbfe63 DC |
66 | xfs_extent_busy_sort(&tp->t_busy); |
67 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 68 | |
ba18781b | 69 | trace_xfs_trans_free(tp, _RET_IP_); |
b1c1b5b6 | 70 | atomic_dec(&tp->t_mountp->m_active_trans); |
253f4911 | 71 | if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT)) |
d9457dc0 | 72 | sb_end_intwrite(tp->t_mountp->m_super); |
b1c1b5b6 DC |
73 | xfs_trans_free_dqinfo(tp); |
74 | kmem_zone_free(xfs_trans_zone, tp); | |
75 | } | |
76 | ||
1da177e4 LT |
77 | /* |
78 | * This is called to create a new transaction which will share the | |
79 | * permanent log reservation of the given transaction. The remaining | |
80 | * unused block and rt extent reservations are also inherited. This | |
81 | * implies that the original transaction is no longer allowed to allocate | |
82 | * blocks. Locks and log items, however, are no inherited. They must | |
83 | * be added to the new transaction explicitly. | |
84 | */ | |
f8f2835a | 85 | STATIC struct xfs_trans * |
1da177e4 | 86 | xfs_trans_dup( |
f8f2835a | 87 | struct xfs_trans *tp) |
1da177e4 | 88 | { |
f8f2835a | 89 | struct xfs_trans *ntp; |
1da177e4 | 90 | |
ba18781b DC |
91 | trace_xfs_trans_dup(tp, _RET_IP_); |
92 | ||
1da177e4 LT |
93 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); |
94 | ||
95 | /* | |
96 | * Initialize the new transaction structure. | |
97 | */ | |
2a3c0acc | 98 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 | 99 | ntp->t_mountp = tp->t_mountp; |
e98c414f | 100 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 101 | INIT_LIST_HEAD(&ntp->t_busy); |
9d9e6233 | 102 | INIT_LIST_HEAD(&ntp->t_dfops); |
bba59c5e | 103 | ntp->t_firstblock = NULLFSBLOCK; |
1da177e4 LT |
104 | |
105 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 106 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 107 | |
d9457dc0 JK |
108 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
109 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
253f4911 | 110 | (tp->t_flags & XFS_TRANS_NO_WRITECOUNT); |
d9457dc0 | 111 | /* We gave our writer reference to the new transaction */ |
253f4911 | 112 | tp->t_flags |= XFS_TRANS_NO_WRITECOUNT; |
cc09c0dc | 113 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
3e78b9a4 BF |
114 | |
115 | ASSERT(tp->t_blk_res >= tp->t_blk_res_used); | |
1da177e4 LT |
116 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
117 | tp->t_blk_res = tp->t_blk_res_used; | |
3e78b9a4 | 118 | |
1da177e4 LT |
119 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; |
120 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 121 | ntp->t_pflags = tp->t_pflags; |
e021a2e5 | 122 | |
9d9e6233 BF |
123 | /* move deferred ops over to the new tp */ |
124 | xfs_defer_move(ntp, tp); | |
1da177e4 | 125 | |
7d095257 | 126 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
127 | |
128 | atomic_inc(&tp->t_mountp->m_active_trans); | |
129 | return ntp; | |
130 | } | |
131 | ||
132 | /* | |
133 | * This is called to reserve free disk blocks and log space for the | |
134 | * given transaction. This must be done before allocating any resources | |
135 | * within the transaction. | |
136 | * | |
137 | * This will return ENOSPC if there are not enough blocks available. | |
138 | * It will sleep waiting for available log space. | |
139 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
140 | * is used by long running transactions. If any one of the reservations | |
141 | * fails then they will all be backed out. | |
142 | * | |
143 | * This does not do quota reservations. That typically is done by the | |
144 | * caller afterwards. | |
145 | */ | |
253f4911 | 146 | static int |
1da177e4 | 147 | xfs_trans_reserve( |
3d3c8b52 JL |
148 | struct xfs_trans *tp, |
149 | struct xfs_trans_res *resp, | |
150 | uint blocks, | |
151 | uint rtextents) | |
1da177e4 | 152 | { |
59c1b082 | 153 | int error = 0; |
0d485ada | 154 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
1da177e4 LT |
155 | |
156 | /* Mark this thread as being in a transaction */ | |
9070733b | 157 | current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 LT |
158 | |
159 | /* | |
160 | * Attempt to reserve the needed disk blocks by decrementing | |
161 | * the number needed from the number available. This will | |
162 | * fail if the count would go below zero. | |
163 | */ | |
164 | if (blocks > 0) { | |
0d485ada | 165 | error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 | 166 | if (error != 0) { |
9070733b | 167 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
2451337d | 168 | return -ENOSPC; |
1da177e4 LT |
169 | } |
170 | tp->t_blk_res += blocks; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Reserve the log space needed for this transaction. | |
175 | */ | |
3d3c8b52 | 176 | if (resp->tr_logres > 0) { |
9006fb91 CH |
177 | bool permanent = false; |
178 | ||
3d3c8b52 JL |
179 | ASSERT(tp->t_log_res == 0 || |
180 | tp->t_log_res == resp->tr_logres); | |
181 | ASSERT(tp->t_log_count == 0 || | |
182 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 183 | |
3d3c8b52 | 184 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 185 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 186 | permanent = true; |
1da177e4 LT |
187 | } else { |
188 | ASSERT(tp->t_ticket == NULL); | |
189 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
190 | } |
191 | ||
9006fb91 | 192 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 193 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
194 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
195 | } else { | |
3d3c8b52 JL |
196 | error = xfs_log_reserve(tp->t_mountp, |
197 | resp->tr_logres, | |
198 | resp->tr_logcount, | |
199 | &tp->t_ticket, XFS_TRANSACTION, | |
710b1e2c | 200 | permanent); |
1da177e4 | 201 | } |
9006fb91 CH |
202 | |
203 | if (error) | |
204 | goto undo_blocks; | |
205 | ||
3d3c8b52 JL |
206 | tp->t_log_res = resp->tr_logres; |
207 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
208 | } |
209 | ||
210 | /* | |
211 | * Attempt to reserve the needed realtime extents by decrementing | |
212 | * the number needed from the number available. This will | |
213 | * fail if the count would go below zero. | |
214 | */ | |
215 | if (rtextents > 0) { | |
bab98bbe | 216 | error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents)); |
1da177e4 | 217 | if (error) { |
2451337d | 218 | error = -ENOSPC; |
1da177e4 LT |
219 | goto undo_log; |
220 | } | |
221 | tp->t_rtx_res += rtextents; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | ||
226 | /* | |
227 | * Error cases jump to one of these labels to undo any | |
228 | * reservations which have already been performed. | |
229 | */ | |
230 | undo_log: | |
3d3c8b52 | 231 | if (resp->tr_logres > 0) { |
f78c3901 | 232 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false); |
1da177e4 LT |
233 | tp->t_ticket = NULL; |
234 | tp->t_log_res = 0; | |
235 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
236 | } | |
237 | ||
238 | undo_blocks: | |
239 | if (blocks > 0) { | |
a27f6ef4 | 240 | xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd); |
1da177e4 LT |
241 | tp->t_blk_res = 0; |
242 | } | |
243 | ||
9070733b | 244 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 245 | |
59c1b082 | 246 | return error; |
1da177e4 LT |
247 | } |
248 | ||
253f4911 CH |
249 | int |
250 | xfs_trans_alloc( | |
251 | struct xfs_mount *mp, | |
252 | struct xfs_trans_res *resp, | |
253 | uint blocks, | |
254 | uint rtextents, | |
255 | uint flags, | |
256 | struct xfs_trans **tpp) | |
257 | { | |
258 | struct xfs_trans *tp; | |
259 | int error; | |
260 | ||
8683edb7 DC |
261 | /* |
262 | * Allocate the handle before we do our freeze accounting and setting up | |
263 | * GFP_NOFS allocation context so that we avoid lockdep false positives | |
264 | * by doing GFP_KERNEL allocations inside sb_start_intwrite(). | |
265 | */ | |
266 | tp = kmem_zone_zalloc(xfs_trans_zone, | |
267 | (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); | |
268 | ||
253f4911 CH |
269 | if (!(flags & XFS_TRANS_NO_WRITECOUNT)) |
270 | sb_start_intwrite(mp->m_super); | |
271 | ||
10ee2526 DW |
272 | /* |
273 | * Zero-reservation ("empty") transactions can't modify anything, so | |
274 | * they're allowed to run while we're frozen. | |
275 | */ | |
276 | WARN_ON(resp->tr_logres > 0 && | |
277 | mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); | |
253f4911 CH |
278 | atomic_inc(&mp->m_active_trans); |
279 | ||
253f4911 CH |
280 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
281 | tp->t_flags = flags; | |
282 | tp->t_mountp = mp; | |
283 | INIT_LIST_HEAD(&tp->t_items); | |
284 | INIT_LIST_HEAD(&tp->t_busy); | |
9d9e6233 | 285 | INIT_LIST_HEAD(&tp->t_dfops); |
bba59c5e | 286 | tp->t_firstblock = NULLFSBLOCK; |
253f4911 CH |
287 | |
288 | error = xfs_trans_reserve(tp, resp, blocks, rtextents); | |
289 | if (error) { | |
290 | xfs_trans_cancel(tp); | |
291 | return error; | |
292 | } | |
293 | ||
ba18781b DC |
294 | trace_xfs_trans_alloc(tp, _RET_IP_); |
295 | ||
253f4911 CH |
296 | *tpp = tp; |
297 | return 0; | |
298 | } | |
299 | ||
e89c0413 DW |
300 | /* |
301 | * Create an empty transaction with no reservation. This is a defensive | |
302 | * mechanism for routines that query metadata without actually modifying | |
303 | * them -- if the metadata being queried is somehow cross-linked (think a | |
304 | * btree block pointer that points higher in the tree), we risk deadlock. | |
305 | * However, blocks grabbed as part of a transaction can be re-grabbed. | |
306 | * The verifiers will notice the corrupt block and the operation will fail | |
307 | * back to userspace without deadlocking. | |
308 | * | |
309 | * Note the zero-length reservation; this transaction MUST be cancelled | |
310 | * without any dirty data. | |
311 | */ | |
312 | int | |
313 | xfs_trans_alloc_empty( | |
314 | struct xfs_mount *mp, | |
315 | struct xfs_trans **tpp) | |
316 | { | |
317 | struct xfs_trans_res resv = {0}; | |
318 | ||
319 | return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp); | |
320 | } | |
321 | ||
1da177e4 LT |
322 | /* |
323 | * Record the indicated change to the given field for application | |
324 | * to the file system's superblock when the transaction commits. | |
325 | * For now, just store the change in the transaction structure. | |
326 | * | |
327 | * Mark the transaction structure to indicate that the superblock | |
328 | * needs to be updated before committing. | |
92821e2b DC |
329 | * |
330 | * Because we may not be keeping track of allocated/free inodes and | |
331 | * used filesystem blocks in the superblock, we do not mark the | |
332 | * superblock dirty in this transaction if we modify these fields. | |
333 | * We still need to update the transaction deltas so that they get | |
334 | * applied to the incore superblock, but we don't want them to | |
335 | * cause the superblock to get locked and logged if these are the | |
336 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
337 | */ |
338 | void | |
339 | xfs_trans_mod_sb( | |
340 | xfs_trans_t *tp, | |
341 | uint field, | |
20f4ebf2 | 342 | int64_t delta) |
1da177e4 | 343 | { |
92821e2b DC |
344 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
345 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
346 | |
347 | switch (field) { | |
348 | case XFS_TRANS_SB_ICOUNT: | |
349 | tp->t_icount_delta += delta; | |
92821e2b DC |
350 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
351 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
352 | break; |
353 | case XFS_TRANS_SB_IFREE: | |
354 | tp->t_ifree_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_FDBLOCKS: | |
359 | /* | |
3e78b9a4 BF |
360 | * Track the number of blocks allocated in the transaction. |
361 | * Make sure it does not exceed the number reserved. If so, | |
362 | * shutdown as this can lead to accounting inconsistency. | |
1da177e4 LT |
363 | */ |
364 | if (delta < 0) { | |
365 | tp->t_blk_res_used += (uint)-delta; | |
3e78b9a4 BF |
366 | if (tp->t_blk_res_used > tp->t_blk_res) |
367 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
1da177e4 LT |
368 | } |
369 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
370 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
371 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
372 | break; |
373 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
374 | /* | |
375 | * The allocation has already been applied to the | |
376 | * in-core superblock's counter. This should only | |
377 | * be applied to the on-disk superblock. | |
378 | */ | |
1da177e4 | 379 | tp->t_res_fdblocks_delta += delta; |
92821e2b DC |
380 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
381 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
382 | break; |
383 | case XFS_TRANS_SB_FREXTENTS: | |
384 | /* | |
385 | * Track the number of blocks allocated in the | |
386 | * transaction. Make sure it does not exceed the | |
387 | * number reserved. | |
388 | */ | |
389 | if (delta < 0) { | |
390 | tp->t_rtx_res_used += (uint)-delta; | |
391 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
392 | } | |
393 | tp->t_frextents_delta += delta; | |
394 | break; | |
395 | case XFS_TRANS_SB_RES_FREXTENTS: | |
396 | /* | |
397 | * The allocation has already been applied to the | |
c41564b5 | 398 | * in-core superblock's counter. This should only |
1da177e4 LT |
399 | * be applied to the on-disk superblock. |
400 | */ | |
401 | ASSERT(delta < 0); | |
402 | tp->t_res_frextents_delta += delta; | |
403 | break; | |
404 | case XFS_TRANS_SB_DBLOCKS: | |
405 | ASSERT(delta > 0); | |
406 | tp->t_dblocks_delta += delta; | |
407 | break; | |
408 | case XFS_TRANS_SB_AGCOUNT: | |
409 | ASSERT(delta > 0); | |
410 | tp->t_agcount_delta += delta; | |
411 | break; | |
412 | case XFS_TRANS_SB_IMAXPCT: | |
413 | tp->t_imaxpct_delta += delta; | |
414 | break; | |
415 | case XFS_TRANS_SB_REXTSIZE: | |
416 | tp->t_rextsize_delta += delta; | |
417 | break; | |
418 | case XFS_TRANS_SB_RBMBLOCKS: | |
419 | tp->t_rbmblocks_delta += delta; | |
420 | break; | |
421 | case XFS_TRANS_SB_RBLOCKS: | |
422 | tp->t_rblocks_delta += delta; | |
423 | break; | |
424 | case XFS_TRANS_SB_REXTENTS: | |
425 | tp->t_rextents_delta += delta; | |
426 | break; | |
427 | case XFS_TRANS_SB_REXTSLOG: | |
428 | tp->t_rextslog_delta += delta; | |
429 | break; | |
430 | default: | |
431 | ASSERT(0); | |
432 | return; | |
433 | } | |
434 | ||
210c6f1c | 435 | tp->t_flags |= flags; |
1da177e4 LT |
436 | } |
437 | ||
438 | /* | |
439 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
440 | * to bring the superblock buffer into the current transaction | |
441 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
442 | * | |
443 | * For now we just look at each field allowed to change and change | |
444 | * it if necessary. | |
445 | */ | |
446 | STATIC void | |
447 | xfs_trans_apply_sb_deltas( | |
448 | xfs_trans_t *tp) | |
449 | { | |
2bdf7cd0 | 450 | xfs_dsb_t *sbp; |
1da177e4 LT |
451 | xfs_buf_t *bp; |
452 | int whole = 0; | |
453 | ||
8c9ce2f7 | 454 | bp = xfs_trans_getsb(tp, tp->t_mountp); |
1da177e4 LT |
455 | sbp = XFS_BUF_TO_SBP(bp); |
456 | ||
457 | /* | |
458 | * Check that superblock mods match the mods made to AGF counters. | |
459 | */ | |
460 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
461 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
462 | tp->t_ag_btree_delta)); | |
463 | ||
92821e2b DC |
464 | /* |
465 | * Only update the superblock counters if we are logging them | |
466 | */ | |
467 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 468 | if (tp->t_icount_delta) |
413d57c9 | 469 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 470 | if (tp->t_ifree_delta) |
413d57c9 | 471 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 472 | if (tp->t_fdblocks_delta) |
413d57c9 | 473 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 474 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 475 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
476 | } |
477 | ||
2bdf7cd0 | 478 | if (tp->t_frextents_delta) |
413d57c9 | 479 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 480 | if (tp->t_res_frextents_delta) |
413d57c9 | 481 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
482 | |
483 | if (tp->t_dblocks_delta) { | |
413d57c9 | 484 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
485 | whole = 1; |
486 | } | |
2bdf7cd0 | 487 | if (tp->t_agcount_delta) { |
413d57c9 | 488 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
489 | whole = 1; |
490 | } | |
2bdf7cd0 CH |
491 | if (tp->t_imaxpct_delta) { |
492 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
493 | whole = 1; |
494 | } | |
2bdf7cd0 | 495 | if (tp->t_rextsize_delta) { |
413d57c9 | 496 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
497 | whole = 1; |
498 | } | |
2bdf7cd0 | 499 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 500 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
501 | whole = 1; |
502 | } | |
2bdf7cd0 | 503 | if (tp->t_rblocks_delta) { |
413d57c9 | 504 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
505 | whole = 1; |
506 | } | |
2bdf7cd0 | 507 | if (tp->t_rextents_delta) { |
413d57c9 | 508 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
509 | whole = 1; |
510 | } | |
2bdf7cd0 CH |
511 | if (tp->t_rextslog_delta) { |
512 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
513 | whole = 1; |
514 | } | |
515 | ||
3443a3bc | 516 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
517 | if (whole) |
518 | /* | |
c41564b5 | 519 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 520 | */ |
2bdf7cd0 | 521 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
522 | else |
523 | /* | |
524 | * Since all the modifiable fields are contiguous, we | |
525 | * can get away with this. | |
526 | */ | |
2bdf7cd0 CH |
527 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
528 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 529 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
530 | } |
531 | ||
0bd5dded DC |
532 | STATIC int |
533 | xfs_sb_mod8( | |
534 | uint8_t *field, | |
535 | int8_t delta) | |
536 | { | |
537 | int8_t counter = *field; | |
538 | ||
539 | counter += delta; | |
540 | if (counter < 0) { | |
541 | ASSERT(0); | |
542 | return -EINVAL; | |
543 | } | |
544 | *field = counter; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | STATIC int | |
549 | xfs_sb_mod32( | |
550 | uint32_t *field, | |
551 | int32_t delta) | |
552 | { | |
553 | int32_t counter = *field; | |
554 | ||
555 | counter += delta; | |
556 | if (counter < 0) { | |
557 | ASSERT(0); | |
558 | return -EINVAL; | |
559 | } | |
560 | *field = counter; | |
561 | return 0; | |
562 | } | |
563 | ||
564 | STATIC int | |
565 | xfs_sb_mod64( | |
566 | uint64_t *field, | |
567 | int64_t delta) | |
568 | { | |
569 | int64_t counter = *field; | |
570 | ||
571 | counter += delta; | |
572 | if (counter < 0) { | |
573 | ASSERT(0); | |
574 | return -EINVAL; | |
575 | } | |
576 | *field = counter; | |
577 | return 0; | |
578 | } | |
579 | ||
1da177e4 | 580 | /* |
45c34141 DC |
581 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
582 | * and apply superblock counter changes to the in-core superblock. The | |
583 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
584 | * applied to the in-core superblock. The idea is that that has already been | |
585 | * done. | |
1da177e4 | 586 | * |
45c34141 DC |
587 | * If we are not logging superblock counters, then the inode allocated/free and |
588 | * used block counts are not updated in the on disk superblock. In this case, | |
589 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
590 | * still need to update the incore superblock with the changes. | |
1da177e4 | 591 | */ |
71e330b5 | 592 | void |
1da177e4 | 593 | xfs_trans_unreserve_and_mod_sb( |
0bd5dded | 594 | struct xfs_trans *tp) |
1da177e4 | 595 | { |
0bd5dded DC |
596 | struct xfs_mount *mp = tp->t_mountp; |
597 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
598 | int64_t blkdelta = 0; | |
599 | int64_t rtxdelta = 0; | |
600 | int64_t idelta = 0; | |
601 | int64_t ifreedelta = 0; | |
602 | int error; | |
1da177e4 | 603 | |
1b040712 | 604 | /* calculate deltas */ |
45c34141 DC |
605 | if (tp->t_blk_res > 0) |
606 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
607 | if ((tp->t_fdblocks_delta != 0) && |
608 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
609 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
610 | blkdelta += tp->t_fdblocks_delta; | |
611 | ||
45c34141 DC |
612 | if (tp->t_rtx_res > 0) |
613 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
614 | if ((tp->t_frextents_delta != 0) && |
615 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
616 | rtxdelta += tp->t_frextents_delta; | |
617 | ||
1b040712 CH |
618 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
619 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
620 | idelta = tp->t_icount_delta; | |
621 | ifreedelta = tp->t_ifree_delta; | |
622 | } | |
623 | ||
624 | /* apply the per-cpu counters */ | |
625 | if (blkdelta) { | |
0d485ada | 626 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
627 | if (error) |
628 | goto out; | |
629 | } | |
630 | ||
631 | if (idelta) { | |
501ab323 | 632 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
633 | if (error) |
634 | goto out_undo_fdblocks; | |
635 | } | |
636 | ||
637 | if (ifreedelta) { | |
e88b64ea | 638 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
639 | if (error) |
640 | goto out_undo_icount; | |
641 | } | |
642 | ||
0bd5dded DC |
643 | if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY)) |
644 | return; | |
645 | ||
1b040712 | 646 | /* apply remaining deltas */ |
0bd5dded | 647 | spin_lock(&mp->m_sb_lock); |
bab98bbe | 648 | if (rtxdelta) { |
0bd5dded | 649 | error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta); |
bab98bbe DC |
650 | if (error) |
651 | goto out_undo_ifree; | |
1da177e4 LT |
652 | } |
653 | ||
0bd5dded DC |
654 | if (tp->t_dblocks_delta != 0) { |
655 | error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta); | |
1b040712 | 656 | if (error) |
bab98bbe | 657 | goto out_undo_frextents; |
1da177e4 | 658 | } |
0bd5dded DC |
659 | if (tp->t_agcount_delta != 0) { |
660 | error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta); | |
661 | if (error) | |
662 | goto out_undo_dblocks; | |
663 | } | |
664 | if (tp->t_imaxpct_delta != 0) { | |
665 | error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta); | |
666 | if (error) | |
667 | goto out_undo_agcount; | |
668 | } | |
669 | if (tp->t_rextsize_delta != 0) { | |
670 | error = xfs_sb_mod32(&mp->m_sb.sb_rextsize, | |
671 | tp->t_rextsize_delta); | |
672 | if (error) | |
673 | goto out_undo_imaxpct; | |
674 | } | |
675 | if (tp->t_rbmblocks_delta != 0) { | |
676 | error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, | |
677 | tp->t_rbmblocks_delta); | |
678 | if (error) | |
679 | goto out_undo_rextsize; | |
680 | } | |
681 | if (tp->t_rblocks_delta != 0) { | |
682 | error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta); | |
683 | if (error) | |
684 | goto out_undo_rbmblocks; | |
685 | } | |
686 | if (tp->t_rextents_delta != 0) { | |
687 | error = xfs_sb_mod64(&mp->m_sb.sb_rextents, | |
688 | tp->t_rextents_delta); | |
689 | if (error) | |
690 | goto out_undo_rblocks; | |
691 | } | |
692 | if (tp->t_rextslog_delta != 0) { | |
693 | error = xfs_sb_mod8(&mp->m_sb.sb_rextslog, | |
694 | tp->t_rextslog_delta); | |
695 | if (error) | |
696 | goto out_undo_rextents; | |
697 | } | |
698 | spin_unlock(&mp->m_sb_lock); | |
1b040712 CH |
699 | return; |
700 | ||
0bd5dded DC |
701 | out_undo_rextents: |
702 | if (tp->t_rextents_delta) | |
703 | xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta); | |
704 | out_undo_rblocks: | |
705 | if (tp->t_rblocks_delta) | |
706 | xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta); | |
707 | out_undo_rbmblocks: | |
708 | if (tp->t_rbmblocks_delta) | |
709 | xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta); | |
710 | out_undo_rextsize: | |
711 | if (tp->t_rextsize_delta) | |
712 | xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta); | |
713 | out_undo_imaxpct: | |
714 | if (tp->t_rextsize_delta) | |
715 | xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta); | |
716 | out_undo_agcount: | |
717 | if (tp->t_agcount_delta) | |
718 | xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta); | |
719 | out_undo_dblocks: | |
720 | if (tp->t_dblocks_delta) | |
721 | xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta); | |
bab98bbe DC |
722 | out_undo_frextents: |
723 | if (rtxdelta) | |
0bd5dded | 724 | xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta); |
bab98bbe | 725 | out_undo_ifree: |
0bd5dded | 726 | spin_unlock(&mp->m_sb_lock); |
1b040712 | 727 | if (ifreedelta) |
e88b64ea | 728 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
729 | out_undo_icount: |
730 | if (idelta) | |
501ab323 | 731 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
732 | out_undo_fdblocks: |
733 | if (blkdelta) | |
0d485ada | 734 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 735 | out: |
1884bd83 | 736 | ASSERT(error == 0); |
1b040712 | 737 | return; |
1da177e4 LT |
738 | } |
739 | ||
e6631f85 | 740 | /* Add the given log item to the transaction's list of log items. */ |
e98c414f CH |
741 | void |
742 | xfs_trans_add_item( | |
743 | struct xfs_trans *tp, | |
744 | struct xfs_log_item *lip) | |
745 | { | |
f65020a8 JJ |
746 | ASSERT(lip->li_mountp == tp->t_mountp); |
747 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e6631f85 DC |
748 | ASSERT(list_empty(&lip->li_trans)); |
749 | ASSERT(!test_bit(XFS_LI_DIRTY, &lip->li_flags)); | |
e98c414f | 750 | |
e6631f85 | 751 | list_add_tail(&lip->li_trans, &tp->t_items); |
ba18781b | 752 | trace_xfs_trans_add_item(tp, _RET_IP_); |
e98c414f CH |
753 | } |
754 | ||
e98c414f | 755 | /* |
e6631f85 DC |
756 | * Unlink the log item from the transaction. the log item is no longer |
757 | * considered dirty in this transaction, as the linked transaction has | |
758 | * finished, either by abort or commit completion. | |
e98c414f CH |
759 | */ |
760 | void | |
761 | xfs_trans_del_item( | |
762 | struct xfs_log_item *lip) | |
763 | { | |
e6631f85 DC |
764 | clear_bit(XFS_LI_DIRTY, &lip->li_flags); |
765 | list_del_init(&lip->li_trans); | |
e98c414f CH |
766 | } |
767 | ||
e6631f85 | 768 | /* Detach and unlock all of the items in a transaction */ |
195cd83d | 769 | static void |
e98c414f CH |
770 | xfs_trans_free_items( |
771 | struct xfs_trans *tp, | |
eacb24e7 | 772 | bool abort) |
e98c414f | 773 | { |
e6631f85 | 774 | struct xfs_log_item *lip, *next; |
e98c414f | 775 | |
ba18781b DC |
776 | trace_xfs_trans_free_items(tp, _RET_IP_); |
777 | ||
e6631f85 DC |
778 | list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) { |
779 | xfs_trans_del_item(lip); | |
eacb24e7 | 780 | if (abort) |
22525c17 | 781 | set_bit(XFS_LI_ABORTED, &lip->li_flags); |
ddf92053 CH |
782 | if (lip->li_ops->iop_release) |
783 | lip->li_ops->iop_release(lip); | |
e98c414f CH |
784 | } |
785 | } | |
786 | ||
0e57f6a3 DC |
787 | static inline void |
788 | xfs_log_item_batch_insert( | |
789 | struct xfs_ail *ailp, | |
1d8c95a3 | 790 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
791 | struct xfs_log_item **log_items, |
792 | int nr_items, | |
793 | xfs_lsn_t commit_lsn) | |
794 | { | |
795 | int i; | |
796 | ||
57e80956 MW |
797 | spin_lock(&ailp->ail_lock); |
798 | /* xfs_trans_ail_update_bulk drops ailp->ail_lock */ | |
1d8c95a3 | 799 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 800 | |
904c17e6 DC |
801 | for (i = 0; i < nr_items; i++) { |
802 | struct xfs_log_item *lip = log_items[i]; | |
803 | ||
e8b78db7 CH |
804 | if (lip->li_ops->iop_unpin) |
805 | lip->li_ops->iop_unpin(lip, 0); | |
904c17e6 | 806 | } |
0e57f6a3 DC |
807 | } |
808 | ||
809 | /* | |
810 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
811 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
812 | * minimise lock traffic. | |
e34a314c DC |
813 | * |
814 | * If we are called with the aborted flag set, it is because a log write during | |
815 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
ddf92053 | 816 | * checkpoint have already gone through iop_committed and iop_committing, which |
e34a314c DC |
817 | * means that checkpoint commit abort handling is treated exactly the same |
818 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
819 | * this case all we need to do is iop_committed processing, followed by an |
820 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
821 | * |
822 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
823 | * at the end of the AIL, the insert cursor avoids the need to walk | |
824 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
825 | * call. This saves a lot of needless list walking and is a net win, even | |
826 | * though it slightly increases that amount of AIL lock traffic to set it up | |
827 | * and tear it down. | |
0e57f6a3 DC |
828 | */ |
829 | void | |
830 | xfs_trans_committed_bulk( | |
831 | struct xfs_ail *ailp, | |
832 | struct xfs_log_vec *log_vector, | |
833 | xfs_lsn_t commit_lsn, | |
d15cbf2f | 834 | bool aborted) |
0e57f6a3 DC |
835 | { |
836 | #define LOG_ITEM_BATCH_SIZE 32 | |
837 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
838 | struct xfs_log_vec *lv; | |
1d8c95a3 | 839 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
840 | int i = 0; |
841 | ||
57e80956 | 842 | spin_lock(&ailp->ail_lock); |
1d8c95a3 | 843 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); |
57e80956 | 844 | spin_unlock(&ailp->ail_lock); |
1d8c95a3 | 845 | |
0e57f6a3 DC |
846 | /* unpin all the log items */ |
847 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
848 | struct xfs_log_item *lip = lv->lv_item; | |
849 | xfs_lsn_t item_lsn; | |
850 | ||
851 | if (aborted) | |
22525c17 | 852 | set_bit(XFS_LI_ABORTED, &lip->li_flags); |
9ce632a2 CH |
853 | |
854 | if (lip->li_ops->flags & XFS_ITEM_RELEASE_WHEN_COMMITTED) { | |
855 | lip->li_ops->iop_release(lip); | |
856 | continue; | |
857 | } | |
858 | ||
e8b78db7 CH |
859 | if (lip->li_ops->iop_committed) |
860 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); | |
861 | else | |
862 | item_lsn = commit_lsn; | |
0e57f6a3 | 863 | |
1316d4da | 864 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
865 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
866 | continue; | |
867 | ||
e34a314c DC |
868 | /* |
869 | * if we are aborting the operation, no point in inserting the | |
870 | * object into the AIL as we are in a shutdown situation. | |
871 | */ | |
872 | if (aborted) { | |
57e80956 | 873 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->ail_mount)); |
e8b78db7 CH |
874 | if (lip->li_ops->iop_unpin) |
875 | lip->li_ops->iop_unpin(lip, 1); | |
e34a314c DC |
876 | continue; |
877 | } | |
878 | ||
0e57f6a3 DC |
879 | if (item_lsn != commit_lsn) { |
880 | ||
881 | /* | |
882 | * Not a bulk update option due to unusual item_lsn. | |
883 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
884 | * we have the ail lock. Then unpin the item. This does |
885 | * not affect the AIL cursor the bulk insert path is | |
886 | * using. | |
0e57f6a3 | 887 | */ |
57e80956 | 888 | spin_lock(&ailp->ail_lock); |
0e57f6a3 DC |
889 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) |
890 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
891 | else | |
57e80956 | 892 | spin_unlock(&ailp->ail_lock); |
e8b78db7 CH |
893 | if (lip->li_ops->iop_unpin) |
894 | lip->li_ops->iop_unpin(lip, 0); | |
0e57f6a3 DC |
895 | continue; |
896 | } | |
897 | ||
898 | /* Item is a candidate for bulk AIL insert. */ | |
899 | log_items[i++] = lv->lv_item; | |
900 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 901 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
902 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
903 | i = 0; | |
904 | } | |
905 | } | |
906 | ||
907 | /* make sure we insert the remainder! */ | |
908 | if (i) | |
1d8c95a3 DC |
909 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
910 | ||
57e80956 | 911 | spin_lock(&ailp->ail_lock); |
e4a1e29c | 912 | xfs_trans_ail_cursor_done(&cur); |
57e80956 | 913 | spin_unlock(&ailp->ail_lock); |
0e57f6a3 DC |
914 | } |
915 | ||
0924378a | 916 | /* |
b1037058 | 917 | * Commit the given transaction to the log. |
0924378a DC |
918 | * |
919 | * XFS disk error handling mechanism is not based on a typical | |
920 | * transaction abort mechanism. Logically after the filesystem | |
921 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
922 | * be durable - ie. committed to disk - because some metadata might | |
923 | * be inconsistent. In such cases, this returns an error, and the | |
924 | * caller may assume that all locked objects joined to the transaction | |
925 | * have already been unlocked as if the commit had succeeded. | |
926 | * Do not reference the transaction structure after this call. | |
927 | */ | |
70393313 CH |
928 | static int |
929 | __xfs_trans_commit( | |
a3ccd2ca | 930 | struct xfs_trans *tp, |
70393313 | 931 | bool regrant) |
0924378a | 932 | { |
a3ccd2ca | 933 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 934 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 935 | int error = 0; |
0924378a | 936 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
0924378a | 937 | |
ba18781b DC |
938 | trace_xfs_trans_commit(tp, _RET_IP_); |
939 | ||
98719051 BF |
940 | /* |
941 | * Finish deferred items on final commit. Only permanent transactions | |
942 | * should ever have deferred ops. | |
943 | */ | |
9d9e6233 | 944 | WARN_ON_ONCE(!list_empty(&tp->t_dfops) && |
98719051 BF |
945 | !(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); |
946 | if (!regrant && (tp->t_flags & XFS_TRANS_PERM_LOG_RES)) { | |
b277c37f | 947 | error = xfs_defer_finish_noroll(&tp); |
9b1f4e98 | 948 | if (error) |
e021a2e5 | 949 | goto out_unreserve; |
e021a2e5 BF |
950 | } |
951 | ||
0924378a DC |
952 | /* |
953 | * If there is nothing to be logged by the transaction, | |
954 | * then unlock all of the items associated with the | |
955 | * transaction and free the transaction structure. | |
956 | * Also make sure to return any reserved blocks to | |
957 | * the free pool. | |
958 | */ | |
a3ccd2ca CH |
959 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
960 | goto out_unreserve; | |
961 | ||
962 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 963 | error = -EIO; |
a3ccd2ca | 964 | goto out_unreserve; |
0924378a | 965 | } |
a3ccd2ca | 966 | |
0924378a DC |
967 | ASSERT(tp->t_ticket != NULL); |
968 | ||
969 | /* | |
970 | * If we need to update the superblock, then do it now. | |
971 | */ | |
972 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
973 | xfs_trans_apply_sb_deltas(tp); | |
974 | xfs_trans_apply_dquot_deltas(tp); | |
975 | ||
70393313 | 976 | xfs_log_commit_cil(mp, tp, &commit_lsn, regrant); |
1da177e4 | 977 | |
9070733b | 978 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
0244b960 CH |
979 | xfs_trans_free(tp); |
980 | ||
1da177e4 LT |
981 | /* |
982 | * If the transaction needs to be synchronous, then force the | |
983 | * log out now and wait for it. | |
984 | */ | |
985 | if (sync) { | |
656de4ff | 986 | error = xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
ff6d6af2 | 987 | XFS_STATS_INC(mp, xs_trans_sync); |
1da177e4 | 988 | } else { |
ff6d6af2 | 989 | XFS_STATS_INC(mp, xs_trans_async); |
1da177e4 LT |
990 | } |
991 | ||
a3ccd2ca CH |
992 | return error; |
993 | ||
994 | out_unreserve: | |
995 | xfs_trans_unreserve_and_mod_sb(tp); | |
996 | ||
997 | /* | |
998 | * It is indeed possible for the transaction to be not dirty but | |
999 | * the dqinfo portion to be. All that means is that we have some | |
1000 | * (non-persistent) quota reservations that need to be unreserved. | |
1001 | */ | |
1002 | xfs_trans_unreserve_and_mod_dquots(tp); | |
1003 | if (tp->t_ticket) { | |
f78c3901 | 1004 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant); |
a3ccd2ca | 1005 | if (commit_lsn == -1 && !error) |
2451337d | 1006 | error = -EIO; |
ba18781b | 1007 | tp->t_ticket = NULL; |
a3ccd2ca | 1008 | } |
9070733b | 1009 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
195cd83d | 1010 | xfs_trans_free_items(tp, !!error); |
a3ccd2ca CH |
1011 | xfs_trans_free(tp); |
1012 | ||
ff6d6af2 | 1013 | XFS_STATS_INC(mp, xs_trans_empty); |
a3ccd2ca | 1014 | return error; |
1da177e4 LT |
1015 | } |
1016 | ||
70393313 CH |
1017 | int |
1018 | xfs_trans_commit( | |
1019 | struct xfs_trans *tp) | |
1020 | { | |
1021 | return __xfs_trans_commit(tp, false); | |
1022 | } | |
1023 | ||
1da177e4 LT |
1024 | /* |
1025 | * Unlock all of the transaction's items and free the transaction. | |
1026 | * The transaction must not have modified any of its items, because | |
1027 | * there is no way to restore them to their previous state. | |
1028 | * | |
1029 | * If the transaction has made a log reservation, make sure to release | |
1030 | * it as well. | |
1031 | */ | |
1032 | void | |
1033 | xfs_trans_cancel( | |
4906e215 | 1034 | struct xfs_trans *tp) |
1da177e4 | 1035 | { |
4906e215 CH |
1036 | struct xfs_mount *mp = tp->t_mountp; |
1037 | bool dirty = (tp->t_flags & XFS_TRANS_DIRTY); | |
1da177e4 | 1038 | |
ba18781b DC |
1039 | trace_xfs_trans_cancel(tp, _RET_IP_); |
1040 | ||
98719051 | 1041 | if (tp->t_flags & XFS_TRANS_PERM_LOG_RES) |
9e28a242 | 1042 | xfs_defer_cancel(tp); |
e021a2e5 | 1043 | |
1da177e4 LT |
1044 | /* |
1045 | * See if the caller is relying on us to shut down the | |
1046 | * filesystem. This happens in paths where we detect | |
1047 | * corruption and decide to give up. | |
1048 | */ | |
4906e215 | 1049 | if (dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1050 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1051 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1052 | } |
1da177e4 | 1053 | #ifdef DEBUG |
4906e215 | 1054 | if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
e6631f85 | 1055 | struct xfs_log_item *lip; |
e98c414f | 1056 | |
e6631f85 DC |
1057 | list_for_each_entry(lip, &tp->t_items, li_trans) |
1058 | ASSERT(!(lip->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1059 | } |
1060 | #endif | |
1061 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1062 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 | 1063 | |
ba18781b | 1064 | if (tp->t_ticket) { |
f78c3901 | 1065 | xfs_log_done(mp, tp->t_ticket, NULL, false); |
ba18781b DC |
1066 | tp->t_ticket = NULL; |
1067 | } | |
1da177e4 LT |
1068 | |
1069 | /* mark this thread as no longer being in a transaction */ | |
9070733b | 1070 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 1071 | |
195cd83d | 1072 | xfs_trans_free_items(tp, dirty); |
1da177e4 LT |
1073 | xfs_trans_free(tp); |
1074 | } | |
1075 | ||
322ff6b8 NS |
1076 | /* |
1077 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1078 | * the next: permanent transactions are only flushed out when | |
70393313 | 1079 | * committed with xfs_trans_commit(), but we still want as soon |
322ff6b8 NS |
1080 | * as possible to let chunks of it go to the log. So we commit the |
1081 | * chunk we've been working on and get a new transaction to continue. | |
1082 | */ | |
1083 | int | |
254133f5 | 1084 | xfs_trans_roll( |
411350df | 1085 | struct xfs_trans **tpp) |
322ff6b8 | 1086 | { |
411350df | 1087 | struct xfs_trans *trans = *tpp; |
3d3c8b52 | 1088 | struct xfs_trans_res tres; |
322ff6b8 NS |
1089 | int error; |
1090 | ||
ba18781b DC |
1091 | trace_xfs_trans_roll(trans, _RET_IP_); |
1092 | ||
322ff6b8 NS |
1093 | /* |
1094 | * Copy the critical parameters from one trans to the next. | |
1095 | */ | |
3d3c8b52 JL |
1096 | tres.tr_logres = trans->t_log_res; |
1097 | tres.tr_logcount = trans->t_log_count; | |
411350df | 1098 | |
322ff6b8 NS |
1099 | *tpp = xfs_trans_dup(trans); |
1100 | ||
1101 | /* | |
1102 | * Commit the current transaction. | |
1103 | * If this commit failed, then it'd just unlock those items that | |
1104 | * are not marked ihold. That also means that a filesystem shutdown | |
1105 | * is in progress. The caller takes the responsibility to cancel | |
1106 | * the duplicate transaction that gets returned. | |
1107 | */ | |
70393313 | 1108 | error = __xfs_trans_commit(trans, true); |
322ff6b8 | 1109 | if (error) |
d99831ff | 1110 | return error; |
322ff6b8 | 1111 | |
322ff6b8 | 1112 | /* |
411350df | 1113 | * Reserve space in the log for the next transaction. |
322ff6b8 NS |
1114 | * This also pushes items in the "AIL", the list of logged items, |
1115 | * out to disk if they are taking up space at the tail of the log | |
1116 | * that we want to use. This requires that either nothing be locked | |
1117 | * across this call, or that anything that is locked be logged in | |
1118 | * the prior and the next transactions. | |
1119 | */ | |
3d3c8b52 | 1120 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
411350df | 1121 | return xfs_trans_reserve(*tpp, &tres, 0, 0); |
322ff6b8 | 1122 | } |