2 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
20 #include "xfs_format.h"
21 #include "xfs_log_format.h"
22 #include "xfs_trans_resv.h"
23 #include "xfs_mount.h"
24 #include "xfs_inode.h"
25 #include "xfs_quota.h"
26 #include "xfs_error.h"
27 #include "xfs_trans.h"
28 #include "xfs_buf_item.h"
29 #include "xfs_trans_priv.h"
33 static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
35 return container_of(lip, struct xfs_dq_logitem, qli_item);
39 * returns the number of iovecs needed to log the given dquot item.
42 xfs_qm_dquot_logitem_size(
43 struct xfs_log_item *lip,
48 *nbytes += sizeof(struct xfs_dq_logformat) +
49 sizeof(struct xfs_disk_dquot);
53 * fills in the vector of log iovecs for the given dquot log item.
56 xfs_qm_dquot_logitem_format(
57 struct xfs_log_item *lip,
58 struct xfs_log_vec *lv)
60 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
61 struct xfs_log_iovec *vecp = NULL;
62 struct xfs_dq_logformat *qlf;
64 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
65 qlf->qlf_type = XFS_LI_DQUOT;
67 qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
68 qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
70 qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
71 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
73 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
74 &qlip->qli_dquot->q_core,
75 sizeof(struct xfs_disk_dquot));
79 * Increment the pin count of the given dquot.
82 xfs_qm_dquot_logitem_pin(
83 struct xfs_log_item *lip)
85 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
87 ASSERT(XFS_DQ_IS_LOCKED(dqp));
88 atomic_inc(&dqp->q_pincount);
92 * Decrement the pin count of the given dquot, and wake up
93 * anyone in xfs_dqwait_unpin() if the count goes to 0. The
94 * dquot must have been previously pinned with a call to
95 * xfs_qm_dquot_logitem_pin().
98 xfs_qm_dquot_logitem_unpin(
99 struct xfs_log_item *lip,
102 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
104 ASSERT(atomic_read(&dqp->q_pincount) > 0);
105 if (atomic_dec_and_test(&dqp->q_pincount))
106 wake_up(&dqp->q_pinwait);
110 xfs_qm_dquot_logitem_committed(
111 struct xfs_log_item *lip,
115 * We always re-log the entire dquot when it becomes dirty,
116 * so, the latest copy _is_ the only one that matters.
122 * This is called to wait for the given dquot to be unpinned.
123 * Most of these pin/unpin routines are plagiarized from inode code.
127 struct xfs_dquot *dqp)
129 ASSERT(XFS_DQ_IS_LOCKED(dqp));
130 if (atomic_read(&dqp->q_pincount) == 0)
134 * Give the log a push so we don't wait here too long.
136 xfs_log_force(dqp->q_mount, 0);
137 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
141 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
142 * have been failed during writeback
144 * this informs the AIL that the dquot is already flush locked on the next push,
145 * and acquires a hold on the buffer to ensure that it isn't reclaimed before
146 * dirty data makes it to disk.
149 xfs_dquot_item_error(
150 struct xfs_log_item *lip,
153 ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
154 xfs_set_li_failed(lip, bp);
158 xfs_qm_dquot_logitem_push(
159 struct xfs_log_item *lip,
160 struct list_head *buffer_list)
161 __releases(&lip->li_ailp->ail_lock)
162 __acquires(&lip->li_ailp->ail_lock)
164 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
165 struct xfs_buf *bp = lip->li_buf;
166 uint rval = XFS_ITEM_SUCCESS;
169 if (atomic_read(&dqp->q_pincount) > 0)
170 return XFS_ITEM_PINNED;
173 * The buffer containing this item failed to be written back
174 * previously. Resubmit the buffer for IO
176 if (test_bit(XFS_LI_FAILED, &lip->li_flags)) {
177 if (!xfs_buf_trylock(bp))
178 return XFS_ITEM_LOCKED;
180 if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
181 rval = XFS_ITEM_FLUSHING;
187 if (!xfs_dqlock_nowait(dqp))
188 return XFS_ITEM_LOCKED;
191 * Re-check the pincount now that we stabilized the value by
192 * taking the quota lock.
194 if (atomic_read(&dqp->q_pincount) > 0) {
195 rval = XFS_ITEM_PINNED;
200 * Someone else is already flushing the dquot. Nothing we can do
201 * here but wait for the flush to finish and remove the item from
204 if (!xfs_dqflock_nowait(dqp)) {
205 rval = XFS_ITEM_FLUSHING;
209 spin_unlock(&lip->li_ailp->ail_lock);
211 error = xfs_qm_dqflush(dqp, &bp);
213 if (!xfs_buf_delwri_queue(bp, buffer_list))
214 rval = XFS_ITEM_FLUSHING;
218 spin_lock(&lip->li_ailp->ail_lock);
225 * Unlock the dquot associated with the log item.
226 * Clear the fields of the dquot and dquot log item that
227 * are specific to the current transaction. If the
228 * hold flags is set, do not unlock the dquot.
231 xfs_qm_dquot_logitem_unlock(
232 struct xfs_log_item *lip)
234 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
236 ASSERT(XFS_DQ_IS_LOCKED(dqp));
239 * Clear the transaction pointer in the dquot
241 dqp->q_transp = NULL;
244 * dquots are never 'held' from getting unlocked at the end of
245 * a transaction. Their locking and unlocking is hidden inside the
246 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
253 * this needs to stamp an lsn into the dquot, I think.
254 * rpc's that look at user dquot's would then have to
255 * push on the dependency recorded in the dquot
258 xfs_qm_dquot_logitem_committing(
259 struct xfs_log_item *lip,
265 * This is the ops vector for dquots
267 static const struct xfs_item_ops xfs_dquot_item_ops = {
268 .iop_size = xfs_qm_dquot_logitem_size,
269 .iop_format = xfs_qm_dquot_logitem_format,
270 .iop_pin = xfs_qm_dquot_logitem_pin,
271 .iop_unpin = xfs_qm_dquot_logitem_unpin,
272 .iop_unlock = xfs_qm_dquot_logitem_unlock,
273 .iop_committed = xfs_qm_dquot_logitem_committed,
274 .iop_push = xfs_qm_dquot_logitem_push,
275 .iop_committing = xfs_qm_dquot_logitem_committing,
276 .iop_error = xfs_dquot_item_error
280 * Initialize the dquot log item for a newly allocated dquot.
281 * The dquot isn't locked at this point, but it isn't on any of the lists
282 * either, so we don't care.
285 xfs_qm_dquot_logitem_init(
286 struct xfs_dquot *dqp)
288 struct xfs_dq_logitem *lp = &dqp->q_logitem;
290 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
291 &xfs_dquot_item_ops);
295 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
297 static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
299 return container_of(lip, struct xfs_qoff_logitem, qql_item);
304 * This returns the number of iovecs needed to log the given quotaoff item.
305 * We only need 1 iovec for an quotaoff item. It just logs the
306 * quotaoff_log_format structure.
309 xfs_qm_qoff_logitem_size(
310 struct xfs_log_item *lip,
315 *nbytes += sizeof(struct xfs_qoff_logitem);
319 xfs_qm_qoff_logitem_format(
320 struct xfs_log_item *lip,
321 struct xfs_log_vec *lv)
323 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
324 struct xfs_log_iovec *vecp = NULL;
325 struct xfs_qoff_logformat *qlf;
327 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
328 qlf->qf_type = XFS_LI_QUOTAOFF;
330 qlf->qf_flags = qflip->qql_flags;
331 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
335 * Pinning has no meaning for an quotaoff item, so just return.
338 xfs_qm_qoff_logitem_pin(
339 struct xfs_log_item *lip)
344 * Since pinning has no meaning for an quotaoff item, unpinning does
348 xfs_qm_qoff_logitem_unpin(
349 struct xfs_log_item *lip,
355 * There isn't much you can do to push a quotaoff item. It is simply
356 * stuck waiting for the log to be flushed to disk.
359 xfs_qm_qoff_logitem_push(
360 struct xfs_log_item *lip,
361 struct list_head *buffer_list)
363 return XFS_ITEM_LOCKED;
367 * Quotaoff items have no locking or pushing, so return failure
368 * so that the caller doesn't bother with us.
371 xfs_qm_qoff_logitem_unlock(
372 struct xfs_log_item *lip)
377 * The quotaoff-start-item is logged only once and cannot be moved in the log,
378 * so simply return the lsn at which it's been logged.
381 xfs_qm_qoff_logitem_committed(
382 struct xfs_log_item *lip,
389 xfs_qm_qoffend_logitem_committed(
390 struct xfs_log_item *lip,
393 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
394 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
395 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
398 * Delete the qoff-start logitem from the AIL.
399 * xfs_trans_ail_delete() drops the AIL lock.
401 spin_lock(&ailp->ail_lock);
402 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
404 kmem_free(qfs->qql_item.li_lv_shadow);
405 kmem_free(lip->li_lv_shadow);
408 return (xfs_lsn_t)-1;
412 * XXX rcc - don't know quite what to do with this. I think we can
413 * just ignore it. The only time that isn't the case is if we allow
414 * the client to somehow see that quotas have been turned off in which
415 * we can't allow that to get back until the quotaoff hits the disk.
416 * So how would that happen? Also, do we need different routines for
417 * quotaoff start and quotaoff end? I suspect the answer is yes but
418 * to be sure, I need to look at the recovery code and see how quota off
419 * recovery is handled (do we roll forward or back or do something else).
420 * If we roll forwards or backwards, then we need two separate routines,
421 * one that does nothing and one that stamps in the lsn that matters
422 * (truly makes the quotaoff irrevocable). If we do something else,
423 * then maybe we don't need two.
426 xfs_qm_qoff_logitem_committing(
427 struct xfs_log_item *lip,
428 xfs_lsn_t commit_lsn)
432 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
433 .iop_size = xfs_qm_qoff_logitem_size,
434 .iop_format = xfs_qm_qoff_logitem_format,
435 .iop_pin = xfs_qm_qoff_logitem_pin,
436 .iop_unpin = xfs_qm_qoff_logitem_unpin,
437 .iop_unlock = xfs_qm_qoff_logitem_unlock,
438 .iop_committed = xfs_qm_qoffend_logitem_committed,
439 .iop_push = xfs_qm_qoff_logitem_push,
440 .iop_committing = xfs_qm_qoff_logitem_committing
444 * This is the ops vector shared by all quotaoff-start log items.
446 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
447 .iop_size = xfs_qm_qoff_logitem_size,
448 .iop_format = xfs_qm_qoff_logitem_format,
449 .iop_pin = xfs_qm_qoff_logitem_pin,
450 .iop_unpin = xfs_qm_qoff_logitem_unpin,
451 .iop_unlock = xfs_qm_qoff_logitem_unlock,
452 .iop_committed = xfs_qm_qoff_logitem_committed,
453 .iop_push = xfs_qm_qoff_logitem_push,
454 .iop_committing = xfs_qm_qoff_logitem_committing
458 * Allocate and initialize an quotaoff item of the correct quota type(s).
460 struct xfs_qoff_logitem *
461 xfs_qm_qoff_logitem_init(
462 struct xfs_mount *mp,
463 struct xfs_qoff_logitem *start,
466 struct xfs_qoff_logitem *qf;
468 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
470 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
471 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
472 qf->qql_item.li_mountp = mp;
473 qf->qql_start_lip = start;
474 qf->qql_flags = flags;