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
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
39 #include "xfs_btree.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
43 #include "xfs_itable.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_trans_priv.h"
51 * returns the number of iovecs needed to log the given dquot item.
55 xfs_qm_dquot_logitem_size(
56 xfs_dq_logitem_t *logitem)
59 * we need only two iovecs, one for the format, one for the real thing
65 * fills in the vector of log iovecs for the given dquot log item.
68 xfs_qm_dquot_logitem_format(
69 xfs_dq_logitem_t *logitem,
70 xfs_log_iovec_t *logvec)
73 ASSERT(logitem->qli_dquot);
75 logvec->i_addr = (xfs_caddr_t)&logitem->qli_format;
76 logvec->i_len = sizeof(xfs_dq_logformat_t);
77 logvec->i_type = XLOG_REG_TYPE_QFORMAT;
79 logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core;
80 logvec->i_len = sizeof(xfs_disk_dquot_t);
81 logvec->i_type = XLOG_REG_TYPE_DQUOT;
83 ASSERT(2 == logitem->qli_item.li_desc->lid_size);
84 logitem->qli_format.qlf_size = 2;
89 * Increment the pin count of the given dquot.
92 xfs_qm_dquot_logitem_pin(
93 xfs_dq_logitem_t *logitem)
95 xfs_dquot_t *dqp = logitem->qli_dquot;
97 ASSERT(XFS_DQ_IS_LOCKED(dqp));
98 atomic_inc(&dqp->q_pincount);
102 * Decrement the pin count of the given dquot, and wake up
103 * anyone in xfs_dqwait_unpin() if the count goes to 0. The
104 * dquot must have been previously pinned with a call to
105 * xfs_qm_dquot_logitem_pin().
109 xfs_qm_dquot_logitem_unpin(
110 xfs_dq_logitem_t *logitem,
113 xfs_dquot_t *dqp = logitem->qli_dquot;
115 ASSERT(atomic_read(&dqp->q_pincount) > 0);
116 if (atomic_dec_and_test(&dqp->q_pincount))
117 wake_up(&dqp->q_pinwait);
122 xfs_qm_dquot_logitem_unpin_remove(
123 xfs_dq_logitem_t *logitem,
126 xfs_qm_dquot_logitem_unpin(logitem, 0);
130 * Given the logitem, this writes the corresponding dquot entry to disk
131 * asynchronously. This is called with the dquot entry securely locked;
132 * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot
136 xfs_qm_dquot_logitem_push(
137 xfs_dq_logitem_t *logitem)
142 dqp = logitem->qli_dquot;
144 ASSERT(XFS_DQ_IS_LOCKED(dqp));
145 ASSERT(!completion_done(&dqp->q_flush));
148 * Since we were able to lock the dquot's flush lock and
149 * we found it on the AIL, the dquot must be dirty. This
150 * is because the dquot is removed from the AIL while still
151 * holding the flush lock in xfs_dqflush_done(). Thus, if
152 * we found it in the AIL and were able to obtain the flush
153 * lock without sleeping, then there must not have been
154 * anyone in the process of flushing the dquot.
156 error = xfs_qm_dqflush(dqp, 0);
158 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
159 "xfs_qm_dquot_logitem_push: push error %d on dqp %p",
166 xfs_qm_dquot_logitem_committed(
171 * We always re-log the entire dquot when it becomes dirty,
172 * so, the latest copy _is_ the only one that matters.
179 * This is called to wait for the given dquot to be unpinned.
180 * Most of these pin/unpin routines are plagiarized from inode code.
186 ASSERT(XFS_DQ_IS_LOCKED(dqp));
187 if (atomic_read(&dqp->q_pincount) == 0)
191 * Give the log a push so we don't wait here too long.
193 xfs_log_force(dqp->q_mount, 0);
194 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
198 * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
199 * the dquot is locked by us, but the flush lock isn't. So, here we are
200 * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
201 * If so, we want to push it out to help us take this item off the AIL as soon
204 * We must not be holding the AIL lock at this point. Calling incore() to
205 * search the buffer cache can be a time consuming thing, and AIL lock is a
209 xfs_qm_dquot_logitem_pushbuf(
210 xfs_dq_logitem_t *qip)
216 dqp = qip->qli_dquot;
217 ASSERT(XFS_DQ_IS_LOCKED(dqp));
220 * If flushlock isn't locked anymore, chances are that the
221 * inode flush completed and the inode was taken off the AIL.
224 if (completion_done(&dqp->q_flush) ||
225 ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
230 bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
231 XFS_QI_DQCHUNKLEN(mp), XBF_TRYLOCK);
235 if (XFS_BUF_ISDELAYWRITE(bp))
236 xfs_buf_delwri_promote(bp);
243 * This is called to attempt to lock the dquot associated with this
244 * dquot log item. Don't sleep on the dquot lock or the flush lock.
245 * If the flush lock is already held, indicating that the dquot has
246 * been or is in the process of being flushed, then see if we can
247 * find the dquot's buffer in the buffer cache without sleeping. If
248 * we can and it is marked delayed write, then we want to send it out.
249 * We delay doing so until the push routine, though, to avoid sleeping
250 * in any device strategy routines.
253 xfs_qm_dquot_logitem_trylock(
254 xfs_dq_logitem_t *qip)
258 dqp = qip->qli_dquot;
259 if (atomic_read(&dqp->q_pincount) > 0)
260 return XFS_ITEM_PINNED;
262 if (! xfs_qm_dqlock_nowait(dqp))
263 return XFS_ITEM_LOCKED;
265 if (!xfs_dqflock_nowait(dqp)) {
267 * dquot has already been flushed to the backing buffer,
268 * leave it locked, pushbuf routine will unlock it.
270 return XFS_ITEM_PUSHBUF;
273 ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
274 return XFS_ITEM_SUCCESS;
279 * Unlock the dquot associated with the log item.
280 * Clear the fields of the dquot and dquot log item that
281 * are specific to the current transaction. If the
282 * hold flags is set, do not unlock the dquot.
285 xfs_qm_dquot_logitem_unlock(
286 xfs_dq_logitem_t *ql)
292 ASSERT(XFS_DQ_IS_LOCKED(dqp));
295 * Clear the transaction pointer in the dquot
297 dqp->q_transp = NULL;
300 * dquots are never 'held' from getting unlocked at the end of
301 * a transaction. Their locking and unlocking is hidden inside the
302 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
310 * this needs to stamp an lsn into the dquot, I think.
311 * rpc's that look at user dquot's would then have to
312 * push on the dependency recorded in the dquot
316 xfs_qm_dquot_logitem_committing(
325 * This is the ops vector for dquots
327 static struct xfs_item_ops xfs_dquot_item_ops = {
328 .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
329 .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
330 xfs_qm_dquot_logitem_format,
331 .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
332 .iop_unpin = (void(*)(xfs_log_item_t*, int))
333 xfs_qm_dquot_logitem_unpin,
334 .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
335 xfs_qm_dquot_logitem_unpin_remove,
336 .iop_trylock = (uint(*)(xfs_log_item_t*))
337 xfs_qm_dquot_logitem_trylock,
338 .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
339 .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
340 xfs_qm_dquot_logitem_committed,
341 .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
342 .iop_pushbuf = (void(*)(xfs_log_item_t*))
343 xfs_qm_dquot_logitem_pushbuf,
344 .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
345 xfs_qm_dquot_logitem_committing
349 * Initialize the dquot log item for a newly allocated dquot.
350 * The dquot isn't locked at this point, but it isn't on any of the lists
351 * either, so we don't care.
354 xfs_qm_dquot_logitem_init(
355 struct xfs_dquot *dqp)
357 xfs_dq_logitem_t *lp;
358 lp = &dqp->q_logitem;
360 lp->qli_item.li_type = XFS_LI_DQUOT;
361 lp->qli_item.li_ops = &xfs_dquot_item_ops;
362 lp->qli_item.li_mountp = dqp->q_mount;
364 lp->qli_format.qlf_type = XFS_LI_DQUOT;
365 lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
366 lp->qli_format.qlf_blkno = dqp->q_blkno;
367 lp->qli_format.qlf_len = 1;
369 * This is just the offset of this dquot within its buffer
370 * (which is currently 1 FSB and probably won't change).
371 * Hence 32 bits for this offset should be just fine.
372 * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
373 * here, and recompute it at recovery time.
375 lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
378 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
381 * This returns the number of iovecs needed to log the given quotaoff item.
382 * We only need 1 iovec for an quotaoff item. It just logs the
383 * quotaoff_log_format structure.
387 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
393 * This is called to fill in the vector of log iovecs for the
394 * given quotaoff log item. We use only 1 iovec, and we point that
395 * at the quotaoff_log_format structure embedded in the quotaoff item.
396 * It is at this point that we assert that all of the extent
397 * slots in the quotaoff item have been filled.
400 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf,
401 xfs_log_iovec_t *log_vector)
403 ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
405 log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
406 log_vector->i_len = sizeof(xfs_qoff_logitem_t);
407 log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
408 qf->qql_format.qf_size = 1;
413 * Pinning has no meaning for an quotaoff item, so just return.
417 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
424 * Since pinning has no meaning for an quotaoff item, unpinning does
429 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
436 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
442 * Quotaoff items have no locking, so just return success.
446 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
448 return XFS_ITEM_LOCKED;
452 * Quotaoff items have no locking or pushing, so return failure
453 * so that the caller doesn't bother with us.
457 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
463 * The quotaoff-start-item is logged only once and cannot be moved in the log,
464 * so simply return the lsn at which it's been logged.
468 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
474 * There isn't much you can do to push on an quotaoff item. It is simply
475 * stuck waiting for the log to be flushed to disk.
479 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
487 xfs_qm_qoffend_logitem_committed(
488 xfs_qoff_logitem_t *qfe,
491 xfs_qoff_logitem_t *qfs;
492 struct xfs_ail *ailp;
494 qfs = qfe->qql_start_lip;
495 ailp = qfs->qql_item.li_ailp;
496 spin_lock(&ailp->xa_lock);
498 * Delete the qoff-start logitem from the AIL.
499 * xfs_trans_ail_delete() drops the AIL lock.
501 xfs_trans_ail_delete(ailp, (xfs_log_item_t *)qfs);
504 return (xfs_lsn_t)-1;
508 * XXX rcc - don't know quite what to do with this. I think we can
509 * just ignore it. The only time that isn't the case is if we allow
510 * the client to somehow see that quotas have been turned off in which
511 * we can't allow that to get back until the quotaoff hits the disk.
512 * So how would that happen? Also, do we need different routines for
513 * quotaoff start and quotaoff end? I suspect the answer is yes but
514 * to be sure, I need to look at the recovery code and see how quota off
515 * recovery is handled (do we roll forward or back or do something else).
516 * If we roll forwards or backwards, then we need two separate routines,
517 * one that does nothing and one that stamps in the lsn that matters
518 * (truly makes the quotaoff irrevocable). If we do something else,
519 * then maybe we don't need two.
523 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
530 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
535 static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
536 .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
537 .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
538 xfs_qm_qoff_logitem_format,
539 .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
540 .iop_unpin = (void(*)(xfs_log_item_t* ,int))
541 xfs_qm_qoff_logitem_unpin,
542 .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
543 xfs_qm_qoff_logitem_unpin_remove,
544 .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
545 .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
546 .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
547 xfs_qm_qoffend_logitem_committed,
548 .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
550 .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
551 xfs_qm_qoffend_logitem_committing
555 * This is the ops vector shared by all quotaoff-start log items.
557 static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
558 .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
559 .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
560 xfs_qm_qoff_logitem_format,
561 .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
562 .iop_unpin = (void(*)(xfs_log_item_t*, int))
563 xfs_qm_qoff_logitem_unpin,
564 .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
565 xfs_qm_qoff_logitem_unpin_remove,
566 .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
567 .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
568 .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
569 xfs_qm_qoff_logitem_committed,
570 .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
572 .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
573 xfs_qm_qoff_logitem_committing
577 * Allocate and initialize an quotaoff item of the correct quota type(s).
580 xfs_qm_qoff_logitem_init(
581 struct xfs_mount *mp,
582 xfs_qoff_logitem_t *start,
585 xfs_qoff_logitem_t *qf;
587 qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
589 qf->qql_item.li_type = XFS_LI_QUOTAOFF;
591 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
593 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
594 qf->qql_item.li_mountp = mp;
595 qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
596 qf->qql_format.qf_flags = flags;
597 qf->qql_start_lip = start;