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
;