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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" |
1da177e4 | 14 | #include "xfs_inode.h" |
efc27b52 | 15 | #include "xfs_extent_busy.h" |
1da177e4 | 16 | #include "xfs_quota.h" |
239880ef | 17 | #include "xfs_trans.h" |
a844f451 | 18 | #include "xfs_trans_priv.h" |
239880ef | 19 | #include "xfs_log.h" |
ed3b4d6c | 20 | #include "xfs_trace.h" |
a4fbe6ab | 21 | #include "xfs_error.h" |
f8f2835a | 22 | #include "xfs_defer.h" |
1da177e4 | 23 | |
8f794055 | 24 | kmem_zone_t *xfs_trans_zone; |
1da177e4 | 25 | |
b872af2c DW |
26 | #if defined(CONFIG_TRACEPOINTS) |
27 | static void | |
28 | xfs_trans_trace_reservations( | |
29 | struct xfs_mount *mp) | |
30 | { | |
31 | struct xfs_trans_res resv; | |
32 | struct xfs_trans_res *res; | |
33 | struct xfs_trans_res *end_res; | |
34 | int i; | |
35 | ||
36 | res = (struct xfs_trans_res *)M_RES(mp); | |
37 | end_res = (struct xfs_trans_res *)(M_RES(mp) + 1); | |
38 | for (i = 0; res < end_res; i++, res++) | |
39 | trace_xfs_trans_resv_calc(mp, i, res); | |
40 | xfs_log_get_max_trans_res(mp, &resv); | |
41 | trace_xfs_trans_resv_calc(mp, -1, &resv); | |
42 | } | |
43 | #else | |
44 | # define xfs_trans_trace_reservations(mp) | |
45 | #endif | |
46 | ||
1da177e4 LT |
47 | /* |
48 | * Initialize the precomputed transaction reservation values | |
49 | * in the mount structure. | |
50 | */ | |
51 | void | |
52 | xfs_trans_init( | |
025101dc | 53 | struct xfs_mount *mp) |
1da177e4 | 54 | { |
3d3c8b52 | 55 | xfs_trans_resv_calc(mp, M_RES(mp)); |
b872af2c | 56 | xfs_trans_trace_reservations(mp); |
1da177e4 LT |
57 | } |
58 | ||
b1c1b5b6 DC |
59 | /* |
60 | * Free the transaction structure. If there is more clean up | |
61 | * to do when the structure is freed, add it here. | |
62 | */ | |
63 | STATIC void | |
64 | xfs_trans_free( | |
ed3b4d6c | 65 | struct xfs_trans *tp) |
b1c1b5b6 | 66 | { |
4ecbfe63 DC |
67 | xfs_extent_busy_sort(&tp->t_busy); |
68 | xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); | |
ed3b4d6c | 69 | |
ba18781b | 70 | trace_xfs_trans_free(tp, _RET_IP_); |
b1c1b5b6 | 71 | atomic_dec(&tp->t_mountp->m_active_trans); |
253f4911 | 72 | if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT)) |
d9457dc0 | 73 | sb_end_intwrite(tp->t_mountp->m_super); |
b1c1b5b6 DC |
74 | xfs_trans_free_dqinfo(tp); |
75 | kmem_zone_free(xfs_trans_zone, tp); | |
76 | } | |
77 | ||
1da177e4 LT |
78 | /* |
79 | * This is called to create a new transaction which will share the | |
80 | * permanent log reservation of the given transaction. The remaining | |
81 | * unused block and rt extent reservations are also inherited. This | |
82 | * implies that the original transaction is no longer allowed to allocate | |
83 | * blocks. Locks and log items, however, are no inherited. They must | |
84 | * be added to the new transaction explicitly. | |
85 | */ | |
f8f2835a | 86 | STATIC struct xfs_trans * |
1da177e4 | 87 | xfs_trans_dup( |
f8f2835a | 88 | struct xfs_trans *tp) |
1da177e4 | 89 | { |
f8f2835a | 90 | struct xfs_trans *ntp; |
1da177e4 | 91 | |
ba18781b DC |
92 | trace_xfs_trans_dup(tp, _RET_IP_); |
93 | ||
1da177e4 LT |
94 | ntp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP); |
95 | ||
96 | /* | |
97 | * Initialize the new transaction structure. | |
98 | */ | |
2a3c0acc | 99 | ntp->t_magic = XFS_TRANS_HEADER_MAGIC; |
1da177e4 | 100 | ntp->t_mountp = tp->t_mountp; |
e98c414f | 101 | INIT_LIST_HEAD(&ntp->t_items); |
ed3b4d6c | 102 | INIT_LIST_HEAD(&ntp->t_busy); |
9d9e6233 | 103 | INIT_LIST_HEAD(&ntp->t_dfops); |
bba59c5e | 104 | ntp->t_firstblock = NULLFSBLOCK; |
1da177e4 LT |
105 | |
106 | ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES); | |
1da177e4 | 107 | ASSERT(tp->t_ticket != NULL); |
cfcbbbd0 | 108 | |
d9457dc0 JK |
109 | ntp->t_flags = XFS_TRANS_PERM_LOG_RES | |
110 | (tp->t_flags & XFS_TRANS_RESERVE) | | |
253f4911 | 111 | (tp->t_flags & XFS_TRANS_NO_WRITECOUNT); |
d9457dc0 | 112 | /* We gave our writer reference to the new transaction */ |
253f4911 | 113 | tp->t_flags |= XFS_TRANS_NO_WRITECOUNT; |
cc09c0dc | 114 | ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); |
3e78b9a4 BF |
115 | |
116 | ASSERT(tp->t_blk_res >= tp->t_blk_res_used); | |
1da177e4 LT |
117 | ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; |
118 | tp->t_blk_res = tp->t_blk_res_used; | |
3e78b9a4 | 119 | |
1da177e4 LT |
120 | ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used; |
121 | tp->t_rtx_res = tp->t_rtx_res_used; | |
59c1b082 | 122 | ntp->t_pflags = tp->t_pflags; |
e021a2e5 | 123 | |
9d9e6233 BF |
124 | /* move deferred ops over to the new tp */ |
125 | xfs_defer_move(ntp, tp); | |
1da177e4 | 126 | |
7d095257 | 127 | xfs_trans_dup_dqinfo(tp, ntp); |
1da177e4 LT |
128 | |
129 | atomic_inc(&tp->t_mountp->m_active_trans); | |
130 | return ntp; | |
131 | } | |
132 | ||
133 | /* | |
134 | * This is called to reserve free disk blocks and log space for the | |
135 | * given transaction. This must be done before allocating any resources | |
136 | * within the transaction. | |
137 | * | |
138 | * This will return ENOSPC if there are not enough blocks available. | |
139 | * It will sleep waiting for available log space. | |
140 | * The only valid value for the flags parameter is XFS_RES_LOG_PERM, which | |
141 | * is used by long running transactions. If any one of the reservations | |
142 | * fails then they will all be backed out. | |
143 | * | |
144 | * This does not do quota reservations. That typically is done by the | |
145 | * caller afterwards. | |
146 | */ | |
253f4911 | 147 | static int |
1da177e4 | 148 | xfs_trans_reserve( |
3d3c8b52 JL |
149 | struct xfs_trans *tp, |
150 | struct xfs_trans_res *resp, | |
151 | uint blocks, | |
152 | uint rtextents) | |
1da177e4 | 153 | { |
59c1b082 | 154 | int error = 0; |
0d485ada | 155 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; |
1da177e4 LT |
156 | |
157 | /* Mark this thread as being in a transaction */ | |
9070733b | 158 | current_set_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Attempt to reserve the needed disk blocks by decrementing | |
162 | * the number needed from the number available. This will | |
163 | * fail if the count would go below zero. | |
164 | */ | |
165 | if (blocks > 0) { | |
0d485ada | 166 | error = xfs_mod_fdblocks(tp->t_mountp, -((int64_t)blocks), rsvd); |
1da177e4 | 167 | if (error != 0) { |
9070733b | 168 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
2451337d | 169 | return -ENOSPC; |
1da177e4 LT |
170 | } |
171 | tp->t_blk_res += blocks; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Reserve the log space needed for this transaction. | |
176 | */ | |
3d3c8b52 | 177 | if (resp->tr_logres > 0) { |
9006fb91 CH |
178 | bool permanent = false; |
179 | ||
3d3c8b52 JL |
180 | ASSERT(tp->t_log_res == 0 || |
181 | tp->t_log_res == resp->tr_logres); | |
182 | ASSERT(tp->t_log_count == 0 || | |
183 | tp->t_log_count == resp->tr_logcount); | |
9006fb91 | 184 | |
3d3c8b52 | 185 | if (resp->tr_logflags & XFS_TRANS_PERM_LOG_RES) { |
1da177e4 | 186 | tp->t_flags |= XFS_TRANS_PERM_LOG_RES; |
9006fb91 | 187 | permanent = true; |
1da177e4 LT |
188 | } else { |
189 | ASSERT(tp->t_ticket == NULL); | |
190 | ASSERT(!(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); | |
1da177e4 LT |
191 | } |
192 | ||
9006fb91 | 193 | if (tp->t_ticket != NULL) { |
3d3c8b52 | 194 | ASSERT(resp->tr_logflags & XFS_TRANS_PERM_LOG_RES); |
9006fb91 CH |
195 | error = xfs_log_regrant(tp->t_mountp, tp->t_ticket); |
196 | } else { | |
3d3c8b52 JL |
197 | error = xfs_log_reserve(tp->t_mountp, |
198 | resp->tr_logres, | |
199 | resp->tr_logcount, | |
200 | &tp->t_ticket, XFS_TRANSACTION, | |
710b1e2c | 201 | permanent); |
1da177e4 | 202 | } |
9006fb91 CH |
203 | |
204 | if (error) | |
205 | goto undo_blocks; | |
206 | ||
3d3c8b52 JL |
207 | tp->t_log_res = resp->tr_logres; |
208 | tp->t_log_count = resp->tr_logcount; | |
1da177e4 LT |
209 | } |
210 | ||
211 | /* | |
212 | * Attempt to reserve the needed realtime extents by decrementing | |
213 | * the number needed from the number available. This will | |
214 | * fail if the count would go below zero. | |
215 | */ | |
216 | if (rtextents > 0) { | |
bab98bbe | 217 | error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents)); |
1da177e4 | 218 | if (error) { |
2451337d | 219 | error = -ENOSPC; |
1da177e4 LT |
220 | goto undo_log; |
221 | } | |
222 | tp->t_rtx_res += rtextents; | |
223 | } | |
224 | ||
225 | return 0; | |
226 | ||
227 | /* | |
228 | * Error cases jump to one of these labels to undo any | |
229 | * reservations which have already been performed. | |
230 | */ | |
231 | undo_log: | |
3d3c8b52 | 232 | if (resp->tr_logres > 0) { |
f78c3901 | 233 | xfs_log_done(tp->t_mountp, tp->t_ticket, NULL, false); |
1da177e4 LT |
234 | tp->t_ticket = NULL; |
235 | tp->t_log_res = 0; | |
236 | tp->t_flags &= ~XFS_TRANS_PERM_LOG_RES; | |
237 | } | |
238 | ||
239 | undo_blocks: | |
240 | if (blocks > 0) { | |
a27f6ef4 | 241 | xfs_mod_fdblocks(tp->t_mountp, (int64_t)blocks, rsvd); |
1da177e4 LT |
242 | tp->t_blk_res = 0; |
243 | } | |
244 | ||
9070733b | 245 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 246 | |
59c1b082 | 247 | return error; |
1da177e4 LT |
248 | } |
249 | ||
253f4911 CH |
250 | int |
251 | xfs_trans_alloc( | |
252 | struct xfs_mount *mp, | |
253 | struct xfs_trans_res *resp, | |
254 | uint blocks, | |
255 | uint rtextents, | |
256 | uint flags, | |
257 | struct xfs_trans **tpp) | |
258 | { | |
259 | struct xfs_trans *tp; | |
260 | int error; | |
261 | ||
8683edb7 DC |
262 | /* |
263 | * Allocate the handle before we do our freeze accounting and setting up | |
264 | * GFP_NOFS allocation context so that we avoid lockdep false positives | |
265 | * by doing GFP_KERNEL allocations inside sb_start_intwrite(). | |
266 | */ | |
267 | tp = kmem_zone_zalloc(xfs_trans_zone, | |
268 | (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); | |
269 | ||
253f4911 CH |
270 | if (!(flags & XFS_TRANS_NO_WRITECOUNT)) |
271 | sb_start_intwrite(mp->m_super); | |
272 | ||
10ee2526 DW |
273 | /* |
274 | * Zero-reservation ("empty") transactions can't modify anything, so | |
275 | * they're allowed to run while we're frozen. | |
276 | */ | |
277 | WARN_ON(resp->tr_logres > 0 && | |
278 | mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); | |
253f4911 CH |
279 | atomic_inc(&mp->m_active_trans); |
280 | ||
253f4911 CH |
281 | tp->t_magic = XFS_TRANS_HEADER_MAGIC; |
282 | tp->t_flags = flags; | |
283 | tp->t_mountp = mp; | |
284 | INIT_LIST_HEAD(&tp->t_items); | |
285 | INIT_LIST_HEAD(&tp->t_busy); | |
9d9e6233 | 286 | INIT_LIST_HEAD(&tp->t_dfops); |
bba59c5e | 287 | tp->t_firstblock = NULLFSBLOCK; |
253f4911 CH |
288 | |
289 | error = xfs_trans_reserve(tp, resp, blocks, rtextents); | |
290 | if (error) { | |
291 | xfs_trans_cancel(tp); | |
292 | return error; | |
293 | } | |
294 | ||
ba18781b DC |
295 | trace_xfs_trans_alloc(tp, _RET_IP_); |
296 | ||
253f4911 CH |
297 | *tpp = tp; |
298 | return 0; | |
299 | } | |
300 | ||
e89c0413 DW |
301 | /* |
302 | * Create an empty transaction with no reservation. This is a defensive | |
303 | * mechanism for routines that query metadata without actually modifying | |
304 | * them -- if the metadata being queried is somehow cross-linked (think a | |
305 | * btree block pointer that points higher in the tree), we risk deadlock. | |
306 | * However, blocks grabbed as part of a transaction can be re-grabbed. | |
307 | * The verifiers will notice the corrupt block and the operation will fail | |
308 | * back to userspace without deadlocking. | |
309 | * | |
310 | * Note the zero-length reservation; this transaction MUST be cancelled | |
311 | * without any dirty data. | |
312 | */ | |
313 | int | |
314 | xfs_trans_alloc_empty( | |
315 | struct xfs_mount *mp, | |
316 | struct xfs_trans **tpp) | |
317 | { | |
318 | struct xfs_trans_res resv = {0}; | |
319 | ||
320 | return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp); | |
321 | } | |
322 | ||
1da177e4 LT |
323 | /* |
324 | * Record the indicated change to the given field for application | |
325 | * to the file system's superblock when the transaction commits. | |
326 | * For now, just store the change in the transaction structure. | |
327 | * | |
328 | * Mark the transaction structure to indicate that the superblock | |
329 | * needs to be updated before committing. | |
92821e2b DC |
330 | * |
331 | * Because we may not be keeping track of allocated/free inodes and | |
332 | * used filesystem blocks in the superblock, we do not mark the | |
333 | * superblock dirty in this transaction if we modify these fields. | |
334 | * We still need to update the transaction deltas so that they get | |
335 | * applied to the incore superblock, but we don't want them to | |
336 | * cause the superblock to get locked and logged if these are the | |
337 | * only fields in the superblock that the transaction modifies. | |
1da177e4 LT |
338 | */ |
339 | void | |
340 | xfs_trans_mod_sb( | |
341 | xfs_trans_t *tp, | |
342 | uint field, | |
20f4ebf2 | 343 | int64_t delta) |
1da177e4 | 344 | { |
92821e2b DC |
345 | uint32_t flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY); |
346 | xfs_mount_t *mp = tp->t_mountp; | |
1da177e4 LT |
347 | |
348 | switch (field) { | |
349 | case XFS_TRANS_SB_ICOUNT: | |
350 | tp->t_icount_delta += delta; | |
92821e2b DC |
351 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
352 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
353 | break; |
354 | case XFS_TRANS_SB_IFREE: | |
355 | tp->t_ifree_delta += delta; | |
92821e2b DC |
356 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
357 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
358 | break; |
359 | case XFS_TRANS_SB_FDBLOCKS: | |
360 | /* | |
3e78b9a4 BF |
361 | * Track the number of blocks allocated in the transaction. |
362 | * Make sure it does not exceed the number reserved. If so, | |
363 | * shutdown as this can lead to accounting inconsistency. | |
1da177e4 LT |
364 | */ |
365 | if (delta < 0) { | |
366 | tp->t_blk_res_used += (uint)-delta; | |
3e78b9a4 BF |
367 | if (tp->t_blk_res_used > tp->t_blk_res) |
368 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
1da177e4 LT |
369 | } |
370 | tp->t_fdblocks_delta += delta; | |
92821e2b DC |
371 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
372 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
373 | break; |
374 | case XFS_TRANS_SB_RES_FDBLOCKS: | |
375 | /* | |
376 | * The allocation has already been applied to the | |
377 | * in-core superblock's counter. This should only | |
378 | * be applied to the on-disk superblock. | |
379 | */ | |
1da177e4 | 380 | tp->t_res_fdblocks_delta += delta; |
92821e2b DC |
381 | if (xfs_sb_version_haslazysbcount(&mp->m_sb)) |
382 | flags &= ~XFS_TRANS_SB_DIRTY; | |
1da177e4 LT |
383 | break; |
384 | case XFS_TRANS_SB_FREXTENTS: | |
385 | /* | |
386 | * Track the number of blocks allocated in the | |
387 | * transaction. Make sure it does not exceed the | |
388 | * number reserved. | |
389 | */ | |
390 | if (delta < 0) { | |
391 | tp->t_rtx_res_used += (uint)-delta; | |
392 | ASSERT(tp->t_rtx_res_used <= tp->t_rtx_res); | |
393 | } | |
394 | tp->t_frextents_delta += delta; | |
395 | break; | |
396 | case XFS_TRANS_SB_RES_FREXTENTS: | |
397 | /* | |
398 | * The allocation has already been applied to the | |
c41564b5 | 399 | * in-core superblock's counter. This should only |
1da177e4 LT |
400 | * be applied to the on-disk superblock. |
401 | */ | |
402 | ASSERT(delta < 0); | |
403 | tp->t_res_frextents_delta += delta; | |
404 | break; | |
405 | case XFS_TRANS_SB_DBLOCKS: | |
406 | ASSERT(delta > 0); | |
407 | tp->t_dblocks_delta += delta; | |
408 | break; | |
409 | case XFS_TRANS_SB_AGCOUNT: | |
410 | ASSERT(delta > 0); | |
411 | tp->t_agcount_delta += delta; | |
412 | break; | |
413 | case XFS_TRANS_SB_IMAXPCT: | |
414 | tp->t_imaxpct_delta += delta; | |
415 | break; | |
416 | case XFS_TRANS_SB_REXTSIZE: | |
417 | tp->t_rextsize_delta += delta; | |
418 | break; | |
419 | case XFS_TRANS_SB_RBMBLOCKS: | |
420 | tp->t_rbmblocks_delta += delta; | |
421 | break; | |
422 | case XFS_TRANS_SB_RBLOCKS: | |
423 | tp->t_rblocks_delta += delta; | |
424 | break; | |
425 | case XFS_TRANS_SB_REXTENTS: | |
426 | tp->t_rextents_delta += delta; | |
427 | break; | |
428 | case XFS_TRANS_SB_REXTSLOG: | |
429 | tp->t_rextslog_delta += delta; | |
430 | break; | |
431 | default: | |
432 | ASSERT(0); | |
433 | return; | |
434 | } | |
435 | ||
210c6f1c | 436 | tp->t_flags |= flags; |
1da177e4 LT |
437 | } |
438 | ||
439 | /* | |
440 | * xfs_trans_apply_sb_deltas() is called from the commit code | |
441 | * to bring the superblock buffer into the current transaction | |
442 | * and modify it as requested by earlier calls to xfs_trans_mod_sb(). | |
443 | * | |
444 | * For now we just look at each field allowed to change and change | |
445 | * it if necessary. | |
446 | */ | |
447 | STATIC void | |
448 | xfs_trans_apply_sb_deltas( | |
449 | xfs_trans_t *tp) | |
450 | { | |
2bdf7cd0 | 451 | xfs_dsb_t *sbp; |
1da177e4 LT |
452 | xfs_buf_t *bp; |
453 | int whole = 0; | |
454 | ||
455 | bp = xfs_trans_getsb(tp, tp->t_mountp, 0); | |
456 | sbp = XFS_BUF_TO_SBP(bp); | |
457 | ||
458 | /* | |
459 | * Check that superblock mods match the mods made to AGF counters. | |
460 | */ | |
461 | ASSERT((tp->t_fdblocks_delta + tp->t_res_fdblocks_delta) == | |
462 | (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta + | |
463 | tp->t_ag_btree_delta)); | |
464 | ||
92821e2b DC |
465 | /* |
466 | * Only update the superblock counters if we are logging them | |
467 | */ | |
468 | if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) { | |
2bdf7cd0 | 469 | if (tp->t_icount_delta) |
413d57c9 | 470 | be64_add_cpu(&sbp->sb_icount, tp->t_icount_delta); |
2bdf7cd0 | 471 | if (tp->t_ifree_delta) |
413d57c9 | 472 | be64_add_cpu(&sbp->sb_ifree, tp->t_ifree_delta); |
2bdf7cd0 | 473 | if (tp->t_fdblocks_delta) |
413d57c9 | 474 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_fdblocks_delta); |
2bdf7cd0 | 475 | if (tp->t_res_fdblocks_delta) |
413d57c9 | 476 | be64_add_cpu(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta); |
1da177e4 LT |
477 | } |
478 | ||
2bdf7cd0 | 479 | if (tp->t_frextents_delta) |
413d57c9 | 480 | be64_add_cpu(&sbp->sb_frextents, tp->t_frextents_delta); |
2bdf7cd0 | 481 | if (tp->t_res_frextents_delta) |
413d57c9 | 482 | be64_add_cpu(&sbp->sb_frextents, tp->t_res_frextents_delta); |
2bdf7cd0 CH |
483 | |
484 | if (tp->t_dblocks_delta) { | |
413d57c9 | 485 | be64_add_cpu(&sbp->sb_dblocks, tp->t_dblocks_delta); |
1da177e4 LT |
486 | whole = 1; |
487 | } | |
2bdf7cd0 | 488 | if (tp->t_agcount_delta) { |
413d57c9 | 489 | be32_add_cpu(&sbp->sb_agcount, tp->t_agcount_delta); |
1da177e4 LT |
490 | whole = 1; |
491 | } | |
2bdf7cd0 CH |
492 | if (tp->t_imaxpct_delta) { |
493 | sbp->sb_imax_pct += tp->t_imaxpct_delta; | |
1da177e4 LT |
494 | whole = 1; |
495 | } | |
2bdf7cd0 | 496 | if (tp->t_rextsize_delta) { |
413d57c9 | 497 | be32_add_cpu(&sbp->sb_rextsize, tp->t_rextsize_delta); |
1da177e4 LT |
498 | whole = 1; |
499 | } | |
2bdf7cd0 | 500 | if (tp->t_rbmblocks_delta) { |
413d57c9 | 501 | be32_add_cpu(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta); |
1da177e4 LT |
502 | whole = 1; |
503 | } | |
2bdf7cd0 | 504 | if (tp->t_rblocks_delta) { |
413d57c9 | 505 | be64_add_cpu(&sbp->sb_rblocks, tp->t_rblocks_delta); |
1da177e4 LT |
506 | whole = 1; |
507 | } | |
2bdf7cd0 | 508 | if (tp->t_rextents_delta) { |
413d57c9 | 509 | be64_add_cpu(&sbp->sb_rextents, tp->t_rextents_delta); |
1da177e4 LT |
510 | whole = 1; |
511 | } | |
2bdf7cd0 CH |
512 | if (tp->t_rextslog_delta) { |
513 | sbp->sb_rextslog += tp->t_rextslog_delta; | |
1da177e4 LT |
514 | whole = 1; |
515 | } | |
516 | ||
3443a3bc | 517 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF); |
1da177e4 LT |
518 | if (whole) |
519 | /* | |
c41564b5 | 520 | * Log the whole thing, the fields are noncontiguous. |
1da177e4 | 521 | */ |
2bdf7cd0 | 522 | xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1); |
1da177e4 LT |
523 | else |
524 | /* | |
525 | * Since all the modifiable fields are contiguous, we | |
526 | * can get away with this. | |
527 | */ | |
2bdf7cd0 CH |
528 | xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount), |
529 | offsetof(xfs_dsb_t, sb_frextents) + | |
1da177e4 | 530 | sizeof(sbp->sb_frextents) - 1); |
1da177e4 LT |
531 | } |
532 | ||
0bd5dded DC |
533 | STATIC int |
534 | xfs_sb_mod8( | |
535 | uint8_t *field, | |
536 | int8_t delta) | |
537 | { | |
538 | int8_t counter = *field; | |
539 | ||
540 | counter += delta; | |
541 | if (counter < 0) { | |
542 | ASSERT(0); | |
543 | return -EINVAL; | |
544 | } | |
545 | *field = counter; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | STATIC int | |
550 | xfs_sb_mod32( | |
551 | uint32_t *field, | |
552 | int32_t delta) | |
553 | { | |
554 | int32_t counter = *field; | |
555 | ||
556 | counter += delta; | |
557 | if (counter < 0) { | |
558 | ASSERT(0); | |
559 | return -EINVAL; | |
560 | } | |
561 | *field = counter; | |
562 | return 0; | |
563 | } | |
564 | ||
565 | STATIC int | |
566 | xfs_sb_mod64( | |
567 | uint64_t *field, | |
568 | int64_t delta) | |
569 | { | |
570 | int64_t counter = *field; | |
571 | ||
572 | counter += delta; | |
573 | if (counter < 0) { | |
574 | ASSERT(0); | |
575 | return -EINVAL; | |
576 | } | |
577 | *field = counter; | |
578 | return 0; | |
579 | } | |
580 | ||
1da177e4 | 581 | /* |
45c34141 DC |
582 | * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations |
583 | * and apply superblock counter changes to the in-core superblock. The | |
584 | * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT | |
585 | * applied to the in-core superblock. The idea is that that has already been | |
586 | * done. | |
1da177e4 | 587 | * |
45c34141 DC |
588 | * If we are not logging superblock counters, then the inode allocated/free and |
589 | * used block counts are not updated in the on disk superblock. In this case, | |
590 | * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we | |
591 | * still need to update the incore superblock with the changes. | |
1da177e4 | 592 | */ |
71e330b5 | 593 | void |
1da177e4 | 594 | xfs_trans_unreserve_and_mod_sb( |
0bd5dded | 595 | struct xfs_trans *tp) |
1da177e4 | 596 | { |
0bd5dded DC |
597 | struct xfs_mount *mp = tp->t_mountp; |
598 | bool rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0; | |
599 | int64_t blkdelta = 0; | |
600 | int64_t rtxdelta = 0; | |
601 | int64_t idelta = 0; | |
602 | int64_t ifreedelta = 0; | |
603 | int error; | |
1da177e4 | 604 | |
1b040712 | 605 | /* calculate deltas */ |
45c34141 DC |
606 | if (tp->t_blk_res > 0) |
607 | blkdelta = tp->t_blk_res; | |
45c34141 DC |
608 | if ((tp->t_fdblocks_delta != 0) && |
609 | (xfs_sb_version_haslazysbcount(&mp->m_sb) || | |
610 | (tp->t_flags & XFS_TRANS_SB_DIRTY))) | |
611 | blkdelta += tp->t_fdblocks_delta; | |
612 | ||
45c34141 DC |
613 | if (tp->t_rtx_res > 0) |
614 | rtxdelta = tp->t_rtx_res; | |
45c34141 DC |
615 | if ((tp->t_frextents_delta != 0) && |
616 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) | |
617 | rtxdelta += tp->t_frextents_delta; | |
618 | ||
1b040712 CH |
619 | if (xfs_sb_version_haslazysbcount(&mp->m_sb) || |
620 | (tp->t_flags & XFS_TRANS_SB_DIRTY)) { | |
621 | idelta = tp->t_icount_delta; | |
622 | ifreedelta = tp->t_ifree_delta; | |
623 | } | |
624 | ||
625 | /* apply the per-cpu counters */ | |
626 | if (blkdelta) { | |
0d485ada | 627 | error = xfs_mod_fdblocks(mp, blkdelta, rsvd); |
1b040712 CH |
628 | if (error) |
629 | goto out; | |
630 | } | |
631 | ||
632 | if (idelta) { | |
501ab323 | 633 | error = xfs_mod_icount(mp, idelta); |
1b040712 CH |
634 | if (error) |
635 | goto out_undo_fdblocks; | |
636 | } | |
637 | ||
638 | if (ifreedelta) { | |
e88b64ea | 639 | error = xfs_mod_ifree(mp, ifreedelta); |
1b040712 CH |
640 | if (error) |
641 | goto out_undo_icount; | |
642 | } | |
643 | ||
0bd5dded DC |
644 | if (rtxdelta == 0 && !(tp->t_flags & XFS_TRANS_SB_DIRTY)) |
645 | return; | |
646 | ||
1b040712 | 647 | /* apply remaining deltas */ |
0bd5dded | 648 | spin_lock(&mp->m_sb_lock); |
bab98bbe | 649 | if (rtxdelta) { |
0bd5dded | 650 | error = xfs_sb_mod64(&mp->m_sb.sb_frextents, rtxdelta); |
bab98bbe DC |
651 | if (error) |
652 | goto out_undo_ifree; | |
1da177e4 LT |
653 | } |
654 | ||
0bd5dded DC |
655 | if (tp->t_dblocks_delta != 0) { |
656 | error = xfs_sb_mod64(&mp->m_sb.sb_dblocks, tp->t_dblocks_delta); | |
1b040712 | 657 | if (error) |
bab98bbe | 658 | goto out_undo_frextents; |
1da177e4 | 659 | } |
0bd5dded DC |
660 | if (tp->t_agcount_delta != 0) { |
661 | error = xfs_sb_mod32(&mp->m_sb.sb_agcount, tp->t_agcount_delta); | |
662 | if (error) | |
663 | goto out_undo_dblocks; | |
664 | } | |
665 | if (tp->t_imaxpct_delta != 0) { | |
666 | error = xfs_sb_mod8(&mp->m_sb.sb_imax_pct, tp->t_imaxpct_delta); | |
667 | if (error) | |
668 | goto out_undo_agcount; | |
669 | } | |
670 | if (tp->t_rextsize_delta != 0) { | |
671 | error = xfs_sb_mod32(&mp->m_sb.sb_rextsize, | |
672 | tp->t_rextsize_delta); | |
673 | if (error) | |
674 | goto out_undo_imaxpct; | |
675 | } | |
676 | if (tp->t_rbmblocks_delta != 0) { | |
677 | error = xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, | |
678 | tp->t_rbmblocks_delta); | |
679 | if (error) | |
680 | goto out_undo_rextsize; | |
681 | } | |
682 | if (tp->t_rblocks_delta != 0) { | |
683 | error = xfs_sb_mod64(&mp->m_sb.sb_rblocks, tp->t_rblocks_delta); | |
684 | if (error) | |
685 | goto out_undo_rbmblocks; | |
686 | } | |
687 | if (tp->t_rextents_delta != 0) { | |
688 | error = xfs_sb_mod64(&mp->m_sb.sb_rextents, | |
689 | tp->t_rextents_delta); | |
690 | if (error) | |
691 | goto out_undo_rblocks; | |
692 | } | |
693 | if (tp->t_rextslog_delta != 0) { | |
694 | error = xfs_sb_mod8(&mp->m_sb.sb_rextslog, | |
695 | tp->t_rextslog_delta); | |
696 | if (error) | |
697 | goto out_undo_rextents; | |
698 | } | |
699 | spin_unlock(&mp->m_sb_lock); | |
1b040712 CH |
700 | return; |
701 | ||
0bd5dded DC |
702 | out_undo_rextents: |
703 | if (tp->t_rextents_delta) | |
704 | xfs_sb_mod64(&mp->m_sb.sb_rextents, -tp->t_rextents_delta); | |
705 | out_undo_rblocks: | |
706 | if (tp->t_rblocks_delta) | |
707 | xfs_sb_mod64(&mp->m_sb.sb_rblocks, -tp->t_rblocks_delta); | |
708 | out_undo_rbmblocks: | |
709 | if (tp->t_rbmblocks_delta) | |
710 | xfs_sb_mod32(&mp->m_sb.sb_rbmblocks, -tp->t_rbmblocks_delta); | |
711 | out_undo_rextsize: | |
712 | if (tp->t_rextsize_delta) | |
713 | xfs_sb_mod32(&mp->m_sb.sb_rextsize, -tp->t_rextsize_delta); | |
714 | out_undo_imaxpct: | |
715 | if (tp->t_rextsize_delta) | |
716 | xfs_sb_mod8(&mp->m_sb.sb_imax_pct, -tp->t_imaxpct_delta); | |
717 | out_undo_agcount: | |
718 | if (tp->t_agcount_delta) | |
719 | xfs_sb_mod32(&mp->m_sb.sb_agcount, -tp->t_agcount_delta); | |
720 | out_undo_dblocks: | |
721 | if (tp->t_dblocks_delta) | |
722 | xfs_sb_mod64(&mp->m_sb.sb_dblocks, -tp->t_dblocks_delta); | |
bab98bbe DC |
723 | out_undo_frextents: |
724 | if (rtxdelta) | |
0bd5dded | 725 | xfs_sb_mod64(&mp->m_sb.sb_frextents, -rtxdelta); |
bab98bbe | 726 | out_undo_ifree: |
0bd5dded | 727 | spin_unlock(&mp->m_sb_lock); |
1b040712 | 728 | if (ifreedelta) |
e88b64ea | 729 | xfs_mod_ifree(mp, -ifreedelta); |
1b040712 CH |
730 | out_undo_icount: |
731 | if (idelta) | |
501ab323 | 732 | xfs_mod_icount(mp, -idelta); |
1b040712 CH |
733 | out_undo_fdblocks: |
734 | if (blkdelta) | |
0d485ada | 735 | xfs_mod_fdblocks(mp, -blkdelta, rsvd); |
1b040712 | 736 | out: |
1884bd83 | 737 | ASSERT(error == 0); |
1b040712 | 738 | return; |
1da177e4 LT |
739 | } |
740 | ||
e6631f85 | 741 | /* Add the given log item to the transaction's list of log items. */ |
e98c414f CH |
742 | void |
743 | xfs_trans_add_item( | |
744 | struct xfs_trans *tp, | |
745 | struct xfs_log_item *lip) | |
746 | { | |
f65020a8 JJ |
747 | ASSERT(lip->li_mountp == tp->t_mountp); |
748 | ASSERT(lip->li_ailp == tp->t_mountp->m_ail); | |
e6631f85 DC |
749 | ASSERT(list_empty(&lip->li_trans)); |
750 | ASSERT(!test_bit(XFS_LI_DIRTY, &lip->li_flags)); | |
e98c414f | 751 | |
e6631f85 | 752 | list_add_tail(&lip->li_trans, &tp->t_items); |
ba18781b | 753 | trace_xfs_trans_add_item(tp, _RET_IP_); |
e98c414f CH |
754 | } |
755 | ||
e98c414f | 756 | /* |
e6631f85 DC |
757 | * Unlink the log item from the transaction. the log item is no longer |
758 | * considered dirty in this transaction, as the linked transaction has | |
759 | * finished, either by abort or commit completion. | |
e98c414f CH |
760 | */ |
761 | void | |
762 | xfs_trans_del_item( | |
763 | struct xfs_log_item *lip) | |
764 | { | |
e6631f85 DC |
765 | clear_bit(XFS_LI_DIRTY, &lip->li_flags); |
766 | list_del_init(&lip->li_trans); | |
e98c414f CH |
767 | } |
768 | ||
e6631f85 | 769 | /* Detach and unlock all of the items in a transaction */ |
d17c701c | 770 | void |
e98c414f CH |
771 | xfs_trans_free_items( |
772 | struct xfs_trans *tp, | |
773 | xfs_lsn_t commit_lsn, | |
eacb24e7 | 774 | bool abort) |
e98c414f | 775 | { |
e6631f85 | 776 | struct xfs_log_item *lip, *next; |
e98c414f | 777 | |
ba18781b DC |
778 | trace_xfs_trans_free_items(tp, _RET_IP_); |
779 | ||
e6631f85 DC |
780 | list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) { |
781 | xfs_trans_del_item(lip); | |
e98c414f | 782 | if (commit_lsn != NULLCOMMITLSN) |
904c17e6 | 783 | lip->li_ops->iop_committing(lip, commit_lsn); |
eacb24e7 | 784 | if (abort) |
22525c17 | 785 | set_bit(XFS_LI_ABORTED, &lip->li_flags); |
904c17e6 | 786 | lip->li_ops->iop_unlock(lip); |
e98c414f CH |
787 | } |
788 | } | |
789 | ||
0e57f6a3 DC |
790 | static inline void |
791 | xfs_log_item_batch_insert( | |
792 | struct xfs_ail *ailp, | |
1d8c95a3 | 793 | struct xfs_ail_cursor *cur, |
0e57f6a3 DC |
794 | struct xfs_log_item **log_items, |
795 | int nr_items, | |
796 | xfs_lsn_t commit_lsn) | |
797 | { | |
798 | int i; | |
799 | ||
57e80956 MW |
800 | spin_lock(&ailp->ail_lock); |
801 | /* xfs_trans_ail_update_bulk drops ailp->ail_lock */ | |
1d8c95a3 | 802 | xfs_trans_ail_update_bulk(ailp, cur, log_items, nr_items, commit_lsn); |
0e57f6a3 | 803 | |
904c17e6 DC |
804 | for (i = 0; i < nr_items; i++) { |
805 | struct xfs_log_item *lip = log_items[i]; | |
806 | ||
807 | lip->li_ops->iop_unpin(lip, 0); | |
808 | } | |
0e57f6a3 DC |
809 | } |
810 | ||
811 | /* | |
812 | * Bulk operation version of xfs_trans_committed that takes a log vector of | |
813 | * items to insert into the AIL. This uses bulk AIL insertion techniques to | |
814 | * minimise lock traffic. | |
e34a314c DC |
815 | * |
816 | * If we are called with the aborted flag set, it is because a log write during | |
817 | * a CIL checkpoint commit has failed. In this case, all the items in the | |
904c17e6 | 818 | * checkpoint have already gone through iop_commited and iop_unlock, which |
e34a314c DC |
819 | * means that checkpoint commit abort handling is treated exactly the same |
820 | * as an iclog write error even though we haven't started any IO yet. Hence in | |
904c17e6 DC |
821 | * this case all we need to do is iop_committed processing, followed by an |
822 | * iop_unpin(aborted) call. | |
1d8c95a3 DC |
823 | * |
824 | * The AIL cursor is used to optimise the insert process. If commit_lsn is not | |
825 | * at the end of the AIL, the insert cursor avoids the need to walk | |
826 | * the AIL to find the insertion point on every xfs_log_item_batch_insert() | |
827 | * call. This saves a lot of needless list walking and is a net win, even | |
828 | * though it slightly increases that amount of AIL lock traffic to set it up | |
829 | * and tear it down. | |
0e57f6a3 DC |
830 | */ |
831 | void | |
832 | xfs_trans_committed_bulk( | |
833 | struct xfs_ail *ailp, | |
834 | struct xfs_log_vec *log_vector, | |
835 | xfs_lsn_t commit_lsn, | |
836 | int aborted) | |
837 | { | |
838 | #define LOG_ITEM_BATCH_SIZE 32 | |
839 | struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; | |
840 | struct xfs_log_vec *lv; | |
1d8c95a3 | 841 | struct xfs_ail_cursor cur; |
0e57f6a3 DC |
842 | int i = 0; |
843 | ||
57e80956 | 844 | spin_lock(&ailp->ail_lock); |
1d8c95a3 | 845 | xfs_trans_ail_cursor_last(ailp, &cur, commit_lsn); |
57e80956 | 846 | spin_unlock(&ailp->ail_lock); |
1d8c95a3 | 847 | |
0e57f6a3 DC |
848 | /* unpin all the log items */ |
849 | for (lv = log_vector; lv; lv = lv->lv_next ) { | |
850 | struct xfs_log_item *lip = lv->lv_item; | |
851 | xfs_lsn_t item_lsn; | |
852 | ||
853 | if (aborted) | |
22525c17 | 854 | set_bit(XFS_LI_ABORTED, &lip->li_flags); |
904c17e6 | 855 | item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); |
0e57f6a3 | 856 | |
1316d4da | 857 | /* item_lsn of -1 means the item needs no further processing */ |
0e57f6a3 DC |
858 | if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) |
859 | continue; | |
860 | ||
e34a314c DC |
861 | /* |
862 | * if we are aborting the operation, no point in inserting the | |
863 | * object into the AIL as we are in a shutdown situation. | |
864 | */ | |
865 | if (aborted) { | |
57e80956 | 866 | ASSERT(XFS_FORCED_SHUTDOWN(ailp->ail_mount)); |
904c17e6 | 867 | lip->li_ops->iop_unpin(lip, 1); |
e34a314c DC |
868 | continue; |
869 | } | |
870 | ||
0e57f6a3 DC |
871 | if (item_lsn != commit_lsn) { |
872 | ||
873 | /* | |
874 | * Not a bulk update option due to unusual item_lsn. | |
875 | * Push into AIL immediately, rechecking the lsn once | |
1d8c95a3 DC |
876 | * we have the ail lock. Then unpin the item. This does |
877 | * not affect the AIL cursor the bulk insert path is | |
878 | * using. | |
0e57f6a3 | 879 | */ |
57e80956 | 880 | spin_lock(&ailp->ail_lock); |
0e57f6a3 DC |
881 | if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) |
882 | xfs_trans_ail_update(ailp, lip, item_lsn); | |
883 | else | |
57e80956 | 884 | spin_unlock(&ailp->ail_lock); |
904c17e6 | 885 | lip->li_ops->iop_unpin(lip, 0); |
0e57f6a3 DC |
886 | continue; |
887 | } | |
888 | ||
889 | /* Item is a candidate for bulk AIL insert. */ | |
890 | log_items[i++] = lv->lv_item; | |
891 | if (i >= LOG_ITEM_BATCH_SIZE) { | |
1d8c95a3 | 892 | xfs_log_item_batch_insert(ailp, &cur, log_items, |
0e57f6a3 DC |
893 | LOG_ITEM_BATCH_SIZE, commit_lsn); |
894 | i = 0; | |
895 | } | |
896 | } | |
897 | ||
898 | /* make sure we insert the remainder! */ | |
899 | if (i) | |
1d8c95a3 DC |
900 | xfs_log_item_batch_insert(ailp, &cur, log_items, i, commit_lsn); |
901 | ||
57e80956 | 902 | spin_lock(&ailp->ail_lock); |
e4a1e29c | 903 | xfs_trans_ail_cursor_done(&cur); |
57e80956 | 904 | spin_unlock(&ailp->ail_lock); |
0e57f6a3 DC |
905 | } |
906 | ||
0924378a | 907 | /* |
b1037058 | 908 | * Commit the given transaction to the log. |
0924378a DC |
909 | * |
910 | * XFS disk error handling mechanism is not based on a typical | |
911 | * transaction abort mechanism. Logically after the filesystem | |
912 | * gets marked 'SHUTDOWN', we can't let any new transactions | |
913 | * be durable - ie. committed to disk - because some metadata might | |
914 | * be inconsistent. In such cases, this returns an error, and the | |
915 | * caller may assume that all locked objects joined to the transaction | |
916 | * have already been unlocked as if the commit had succeeded. | |
917 | * Do not reference the transaction structure after this call. | |
918 | */ | |
70393313 CH |
919 | static int |
920 | __xfs_trans_commit( | |
a3ccd2ca | 921 | struct xfs_trans *tp, |
70393313 | 922 | bool regrant) |
0924378a | 923 | { |
a3ccd2ca | 924 | struct xfs_mount *mp = tp->t_mountp; |
0924378a | 925 | xfs_lsn_t commit_lsn = -1; |
a3ccd2ca | 926 | int error = 0; |
0924378a | 927 | int sync = tp->t_flags & XFS_TRANS_SYNC; |
0924378a | 928 | |
ba18781b DC |
929 | trace_xfs_trans_commit(tp, _RET_IP_); |
930 | ||
98719051 BF |
931 | /* |
932 | * Finish deferred items on final commit. Only permanent transactions | |
933 | * should ever have deferred ops. | |
934 | */ | |
9d9e6233 | 935 | WARN_ON_ONCE(!list_empty(&tp->t_dfops) && |
98719051 BF |
936 | !(tp->t_flags & XFS_TRANS_PERM_LOG_RES)); |
937 | if (!regrant && (tp->t_flags & XFS_TRANS_PERM_LOG_RES)) { | |
b277c37f | 938 | error = xfs_defer_finish_noroll(&tp); |
9b1f4e98 | 939 | if (error) |
e021a2e5 | 940 | goto out_unreserve; |
e021a2e5 BF |
941 | } |
942 | ||
0924378a DC |
943 | /* |
944 | * If there is nothing to be logged by the transaction, | |
945 | * then unlock all of the items associated with the | |
946 | * transaction and free the transaction structure. | |
947 | * Also make sure to return any reserved blocks to | |
948 | * the free pool. | |
949 | */ | |
a3ccd2ca CH |
950 | if (!(tp->t_flags & XFS_TRANS_DIRTY)) |
951 | goto out_unreserve; | |
952 | ||
953 | if (XFS_FORCED_SHUTDOWN(mp)) { | |
2451337d | 954 | error = -EIO; |
a3ccd2ca | 955 | goto out_unreserve; |
0924378a | 956 | } |
a3ccd2ca | 957 | |
0924378a DC |
958 | ASSERT(tp->t_ticket != NULL); |
959 | ||
960 | /* | |
961 | * If we need to update the superblock, then do it now. | |
962 | */ | |
963 | if (tp->t_flags & XFS_TRANS_SB_DIRTY) | |
964 | xfs_trans_apply_sb_deltas(tp); | |
965 | xfs_trans_apply_dquot_deltas(tp); | |
966 | ||
70393313 | 967 | xfs_log_commit_cil(mp, tp, &commit_lsn, regrant); |
1da177e4 | 968 | |
9070733b | 969 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
0244b960 CH |
970 | xfs_trans_free(tp); |
971 | ||
1da177e4 LT |
972 | /* |
973 | * If the transaction needs to be synchronous, then force the | |
974 | * log out now and wait for it. | |
975 | */ | |
976 | if (sync) { | |
656de4ff | 977 | error = xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL); |
ff6d6af2 | 978 | XFS_STATS_INC(mp, xs_trans_sync); |
1da177e4 | 979 | } else { |
ff6d6af2 | 980 | XFS_STATS_INC(mp, xs_trans_async); |
1da177e4 LT |
981 | } |
982 | ||
a3ccd2ca CH |
983 | return error; |
984 | ||
985 | out_unreserve: | |
986 | xfs_trans_unreserve_and_mod_sb(tp); | |
987 | ||
988 | /* | |
989 | * It is indeed possible for the transaction to be not dirty but | |
990 | * the dqinfo portion to be. All that means is that we have some | |
991 | * (non-persistent) quota reservations that need to be unreserved. | |
992 | */ | |
993 | xfs_trans_unreserve_and_mod_dquots(tp); | |
994 | if (tp->t_ticket) { | |
f78c3901 | 995 | commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, regrant); |
a3ccd2ca | 996 | if (commit_lsn == -1 && !error) |
2451337d | 997 | error = -EIO; |
ba18781b | 998 | tp->t_ticket = NULL; |
a3ccd2ca | 999 | } |
9070733b | 1000 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
eacb24e7 | 1001 | xfs_trans_free_items(tp, NULLCOMMITLSN, !!error); |
a3ccd2ca CH |
1002 | xfs_trans_free(tp); |
1003 | ||
ff6d6af2 | 1004 | XFS_STATS_INC(mp, xs_trans_empty); |
a3ccd2ca | 1005 | return error; |
1da177e4 LT |
1006 | } |
1007 | ||
70393313 CH |
1008 | int |
1009 | xfs_trans_commit( | |
1010 | struct xfs_trans *tp) | |
1011 | { | |
1012 | return __xfs_trans_commit(tp, false); | |
1013 | } | |
1014 | ||
1da177e4 LT |
1015 | /* |
1016 | * Unlock all of the transaction's items and free the transaction. | |
1017 | * The transaction must not have modified any of its items, because | |
1018 | * there is no way to restore them to their previous state. | |
1019 | * | |
1020 | * If the transaction has made a log reservation, make sure to release | |
1021 | * it as well. | |
1022 | */ | |
1023 | void | |
1024 | xfs_trans_cancel( | |
4906e215 | 1025 | struct xfs_trans *tp) |
1da177e4 | 1026 | { |
4906e215 CH |
1027 | struct xfs_mount *mp = tp->t_mountp; |
1028 | bool dirty = (tp->t_flags & XFS_TRANS_DIRTY); | |
1da177e4 | 1029 | |
ba18781b DC |
1030 | trace_xfs_trans_cancel(tp, _RET_IP_); |
1031 | ||
98719051 | 1032 | if (tp->t_flags & XFS_TRANS_PERM_LOG_RES) |
9e28a242 | 1033 | xfs_defer_cancel(tp); |
e021a2e5 | 1034 | |
1da177e4 LT |
1035 | /* |
1036 | * See if the caller is relying on us to shut down the | |
1037 | * filesystem. This happens in paths where we detect | |
1038 | * corruption and decide to give up. | |
1039 | */ | |
4906e215 | 1040 | if (dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
0733af21 | 1041 | XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, mp); |
7d04a335 | 1042 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
60a204f0 | 1043 | } |
1da177e4 | 1044 | #ifdef DEBUG |
4906e215 | 1045 | if (!dirty && !XFS_FORCED_SHUTDOWN(mp)) { |
e6631f85 | 1046 | struct xfs_log_item *lip; |
e98c414f | 1047 | |
e6631f85 DC |
1048 | list_for_each_entry(lip, &tp->t_items, li_trans) |
1049 | ASSERT(!(lip->li_type == XFS_LI_EFD)); | |
1da177e4 LT |
1050 | } |
1051 | #endif | |
1052 | xfs_trans_unreserve_and_mod_sb(tp); | |
7d095257 | 1053 | xfs_trans_unreserve_and_mod_dquots(tp); |
1da177e4 | 1054 | |
ba18781b | 1055 | if (tp->t_ticket) { |
f78c3901 | 1056 | xfs_log_done(mp, tp->t_ticket, NULL, false); |
ba18781b DC |
1057 | tp->t_ticket = NULL; |
1058 | } | |
1da177e4 LT |
1059 | |
1060 | /* mark this thread as no longer being in a transaction */ | |
9070733b | 1061 | current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS); |
1da177e4 | 1062 | |
4906e215 | 1063 | xfs_trans_free_items(tp, NULLCOMMITLSN, dirty); |
1da177e4 LT |
1064 | xfs_trans_free(tp); |
1065 | } | |
1066 | ||
322ff6b8 NS |
1067 | /* |
1068 | * Roll from one trans in the sequence of PERMANENT transactions to | |
1069 | * the next: permanent transactions are only flushed out when | |
70393313 | 1070 | * committed with xfs_trans_commit(), but we still want as soon |
322ff6b8 NS |
1071 | * as possible to let chunks of it go to the log. So we commit the |
1072 | * chunk we've been working on and get a new transaction to continue. | |
1073 | */ | |
1074 | int | |
254133f5 | 1075 | xfs_trans_roll( |
411350df | 1076 | struct xfs_trans **tpp) |
322ff6b8 | 1077 | { |
411350df | 1078 | struct xfs_trans *trans = *tpp; |
3d3c8b52 | 1079 | struct xfs_trans_res tres; |
322ff6b8 NS |
1080 | int error; |
1081 | ||
ba18781b DC |
1082 | trace_xfs_trans_roll(trans, _RET_IP_); |
1083 | ||
322ff6b8 NS |
1084 | /* |
1085 | * Copy the critical parameters from one trans to the next. | |
1086 | */ | |
3d3c8b52 JL |
1087 | tres.tr_logres = trans->t_log_res; |
1088 | tres.tr_logcount = trans->t_log_count; | |
411350df | 1089 | |
322ff6b8 NS |
1090 | *tpp = xfs_trans_dup(trans); |
1091 | ||
1092 | /* | |
1093 | * Commit the current transaction. | |
1094 | * If this commit failed, then it'd just unlock those items that | |
1095 | * are not marked ihold. That also means that a filesystem shutdown | |
1096 | * is in progress. The caller takes the responsibility to cancel | |
1097 | * the duplicate transaction that gets returned. | |
1098 | */ | |
70393313 | 1099 | error = __xfs_trans_commit(trans, true); |
322ff6b8 | 1100 | if (error) |
d99831ff | 1101 | return error; |
322ff6b8 | 1102 | |
322ff6b8 | 1103 | /* |
411350df | 1104 | * Reserve space in the log for the next transaction. |
322ff6b8 NS |
1105 | * This also pushes items in the "AIL", the list of logged items, |
1106 | * out to disk if they are taking up space at the tail of the log | |
1107 | * that we want to use. This requires that either nothing be locked | |
1108 | * across this call, or that anything that is locked be logged in | |
1109 | * the prior and the next transactions. | |
1110 | */ | |
3d3c8b52 | 1111 | tres.tr_logflags = XFS_TRANS_PERM_LOG_RES; |
411350df | 1112 | return xfs_trans_reserve(*tpp, &tres, 0, 0); |
322ff6b8 | 1113 | } |