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
) __releases(&lip
->li_ailp
->xa_lock
)
161 __acquires(&lip
->li_ailp
->xa_lock
)
163 struct xfs_dquot
*dqp
= DQUOT_ITEM(lip
)->qli_dquot
;
164 struct xfs_buf
*bp
= lip
->li_buf
;
165 uint rval
= XFS_ITEM_SUCCESS
;
168 if (atomic_read(&dqp
->q_pincount
) > 0)
169 return XFS_ITEM_PINNED
;
172 * The buffer containing this item failed to be written back
173 * previously. Resubmit the buffer for IO
175 if (lip
->li_flags
& XFS_LI_FAILED
) {
176 if (!xfs_buf_trylock(bp
))
177 return XFS_ITEM_LOCKED
;
179 if (!xfs_buf_resubmit_failed_buffers(bp
, buffer_list
))
180 rval
= XFS_ITEM_FLUSHING
;
186 if (!xfs_dqlock_nowait(dqp
))
187 return XFS_ITEM_LOCKED
;
190 * Re-check the pincount now that we stabilized the value by
191 * taking the quota lock.
193 if (atomic_read(&dqp
->q_pincount
) > 0) {
194 rval
= XFS_ITEM_PINNED
;
199 * Someone else is already flushing the dquot. Nothing we can do
200 * here but wait for the flush to finish and remove the item from
203 if (!xfs_dqflock_nowait(dqp
)) {
204 rval
= XFS_ITEM_FLUSHING
;
208 spin_unlock(&lip
->li_ailp
->xa_lock
);
210 error
= xfs_qm_dqflush(dqp
, &bp
);
212 xfs_warn(dqp
->q_mount
, "%s: push error %d on dqp "PTR_FMT
,
213 __func__
, error
, dqp
);
215 if (!xfs_buf_delwri_queue(bp
, buffer_list
))
216 rval
= XFS_ITEM_FLUSHING
;
220 spin_lock(&lip
->li_ailp
->xa_lock
);
227 * Unlock the dquot associated with the log item.
228 * Clear the fields of the dquot and dquot log item that
229 * are specific to the current transaction. If the
230 * hold flags is set, do not unlock the dquot.
233 xfs_qm_dquot_logitem_unlock(
234 struct xfs_log_item
*lip
)
236 struct xfs_dquot
*dqp
= DQUOT_ITEM(lip
)->qli_dquot
;
238 ASSERT(XFS_DQ_IS_LOCKED(dqp
));
241 * Clear the transaction pointer in the dquot
243 dqp
->q_transp
= NULL
;
246 * dquots are never 'held' from getting unlocked at the end of
247 * a transaction. Their locking and unlocking is hidden inside the
248 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
255 * this needs to stamp an lsn into the dquot, I think.
256 * rpc's that look at user dquot's would then have to
257 * push on the dependency recorded in the dquot
260 xfs_qm_dquot_logitem_committing(
261 struct xfs_log_item
*lip
,
267 * This is the ops vector for dquots
269 static const struct xfs_item_ops xfs_dquot_item_ops
= {
270 .iop_size
= xfs_qm_dquot_logitem_size
,
271 .iop_format
= xfs_qm_dquot_logitem_format
,
272 .iop_pin
= xfs_qm_dquot_logitem_pin
,
273 .iop_unpin
= xfs_qm_dquot_logitem_unpin
,
274 .iop_unlock
= xfs_qm_dquot_logitem_unlock
,
275 .iop_committed
= xfs_qm_dquot_logitem_committed
,
276 .iop_push
= xfs_qm_dquot_logitem_push
,
277 .iop_committing
= xfs_qm_dquot_logitem_committing
,
278 .iop_error
= xfs_dquot_item_error
282 * Initialize the dquot log item for a newly allocated dquot.
283 * The dquot isn't locked at this point, but it isn't on any of the lists
284 * either, so we don't care.
287 xfs_qm_dquot_logitem_init(
288 struct xfs_dquot
*dqp
)
290 struct xfs_dq_logitem
*lp
= &dqp
->q_logitem
;
292 xfs_log_item_init(dqp
->q_mount
, &lp
->qli_item
, XFS_LI_DQUOT
,
293 &xfs_dquot_item_ops
);
297 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
299 static inline struct xfs_qoff_logitem
*QOFF_ITEM(struct xfs_log_item
*lip
)
301 return container_of(lip
, struct xfs_qoff_logitem
, qql_item
);
306 * This returns the number of iovecs needed to log the given quotaoff item.
307 * We only need 1 iovec for an quotaoff item. It just logs the
308 * quotaoff_log_format structure.
311 xfs_qm_qoff_logitem_size(
312 struct xfs_log_item
*lip
,
317 *nbytes
+= sizeof(struct xfs_qoff_logitem
);
321 xfs_qm_qoff_logitem_format(
322 struct xfs_log_item
*lip
,
323 struct xfs_log_vec
*lv
)
325 struct xfs_qoff_logitem
*qflip
= QOFF_ITEM(lip
);
326 struct xfs_log_iovec
*vecp
= NULL
;
327 struct xfs_qoff_logformat
*qlf
;
329 qlf
= xlog_prepare_iovec(lv
, &vecp
, XLOG_REG_TYPE_QUOTAOFF
);
330 qlf
->qf_type
= XFS_LI_QUOTAOFF
;
332 qlf
->qf_flags
= qflip
->qql_flags
;
333 xlog_finish_iovec(lv
, vecp
, sizeof(struct xfs_qoff_logitem
));
337 * Pinning has no meaning for an quotaoff item, so just return.
340 xfs_qm_qoff_logitem_pin(
341 struct xfs_log_item
*lip
)
346 * Since pinning has no meaning for an quotaoff item, unpinning does
350 xfs_qm_qoff_logitem_unpin(
351 struct xfs_log_item
*lip
,
357 * There isn't much you can do to push a quotaoff item. It is simply
358 * stuck waiting for the log to be flushed to disk.
361 xfs_qm_qoff_logitem_push(
362 struct xfs_log_item
*lip
,
363 struct list_head
*buffer_list
)
365 return XFS_ITEM_LOCKED
;
369 * Quotaoff items have no locking or pushing, so return failure
370 * so that the caller doesn't bother with us.
373 xfs_qm_qoff_logitem_unlock(
374 struct xfs_log_item
*lip
)
379 * The quotaoff-start-item is logged only once and cannot be moved in the log,
380 * so simply return the lsn at which it's been logged.
383 xfs_qm_qoff_logitem_committed(
384 struct xfs_log_item
*lip
,
391 xfs_qm_qoffend_logitem_committed(
392 struct xfs_log_item
*lip
,
395 struct xfs_qoff_logitem
*qfe
= QOFF_ITEM(lip
);
396 struct xfs_qoff_logitem
*qfs
= qfe
->qql_start_lip
;
397 struct xfs_ail
*ailp
= qfs
->qql_item
.li_ailp
;
400 * Delete the qoff-start logitem from the AIL.
401 * xfs_trans_ail_delete() drops the AIL lock.
403 spin_lock(&ailp
->xa_lock
);
404 xfs_trans_ail_delete(ailp
, &qfs
->qql_item
, SHUTDOWN_LOG_IO_ERROR
);
406 kmem_free(qfs
->qql_item
.li_lv_shadow
);
407 kmem_free(lip
->li_lv_shadow
);
410 return (xfs_lsn_t
)-1;
414 * XXX rcc - don't know quite what to do with this. I think we can
415 * just ignore it. The only time that isn't the case is if we allow
416 * the client to somehow see that quotas have been turned off in which
417 * we can't allow that to get back until the quotaoff hits the disk.
418 * So how would that happen? Also, do we need different routines for
419 * quotaoff start and quotaoff end? I suspect the answer is yes but
420 * to be sure, I need to look at the recovery code and see how quota off
421 * recovery is handled (do we roll forward or back or do something else).
422 * If we roll forwards or backwards, then we need two separate routines,
423 * one that does nothing and one that stamps in the lsn that matters
424 * (truly makes the quotaoff irrevocable). If we do something else,
425 * then maybe we don't need two.
428 xfs_qm_qoff_logitem_committing(
429 struct xfs_log_item
*lip
,
430 xfs_lsn_t commit_lsn
)
434 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops
= {
435 .iop_size
= xfs_qm_qoff_logitem_size
,
436 .iop_format
= xfs_qm_qoff_logitem_format
,
437 .iop_pin
= xfs_qm_qoff_logitem_pin
,
438 .iop_unpin
= xfs_qm_qoff_logitem_unpin
,
439 .iop_unlock
= xfs_qm_qoff_logitem_unlock
,
440 .iop_committed
= xfs_qm_qoffend_logitem_committed
,
441 .iop_push
= xfs_qm_qoff_logitem_push
,
442 .iop_committing
= xfs_qm_qoff_logitem_committing
446 * This is the ops vector shared by all quotaoff-start log items.
448 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops
= {
449 .iop_size
= xfs_qm_qoff_logitem_size
,
450 .iop_format
= xfs_qm_qoff_logitem_format
,
451 .iop_pin
= xfs_qm_qoff_logitem_pin
,
452 .iop_unpin
= xfs_qm_qoff_logitem_unpin
,
453 .iop_unlock
= xfs_qm_qoff_logitem_unlock
,
454 .iop_committed
= xfs_qm_qoff_logitem_committed
,
455 .iop_push
= xfs_qm_qoff_logitem_push
,
456 .iop_committing
= xfs_qm_qoff_logitem_committing
460 * Allocate and initialize an quotaoff item of the correct quota type(s).
462 struct xfs_qoff_logitem
*
463 xfs_qm_qoff_logitem_init(
464 struct xfs_mount
*mp
,
465 struct xfs_qoff_logitem
*start
,
468 struct xfs_qoff_logitem
*qf
;
470 qf
= kmem_zalloc(sizeof(struct xfs_qoff_logitem
), KM_SLEEP
);
472 xfs_log_item_init(mp
, &qf
->qql_item
, XFS_LI_QUOTAOFF
, start
?
473 &xfs_qm_qoffend_logitem_ops
: &xfs_qm_qoff_logitem_ops
);
474 qf
->qql_item
.li_mountp
= mp
;
475 qf
->qql_start_lip
= start
;
476 qf
->qql_flags
= flags
;