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 xfs_qm_dquot_logitem_push(
142 struct xfs_log_item *lip,
143 struct list_head *buffer_list) __releases(&lip->li_ailp->xa_lock)
144 __acquires(&lip->li_ailp->xa_lock)
146 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
147 struct xfs_buf *bp = NULL;
148 uint rval = XFS_ITEM_SUCCESS;
151 if (atomic_read(&dqp->q_pincount) > 0)
152 return XFS_ITEM_PINNED;
154 if (!xfs_dqlock_nowait(dqp))
155 return XFS_ITEM_LOCKED;
158 * Re-check the pincount now that we stabilized the value by
159 * taking the quota lock.
161 if (atomic_read(&dqp->q_pincount) > 0) {
162 rval = XFS_ITEM_PINNED;
167 * Someone else is already flushing the dquot. Nothing we can do
168 * here but wait for the flush to finish and remove the item from
171 if (!xfs_dqflock_nowait(dqp)) {
172 rval = XFS_ITEM_FLUSHING;
176 spin_unlock(&lip->li_ailp->xa_lock);
178 error = xfs_qm_dqflush(dqp, &bp);
180 xfs_warn(dqp->q_mount, "%s: push error %d on dqp %p",
181 __func__, error, dqp);
183 if (!xfs_buf_delwri_queue(bp, buffer_list))
184 rval = XFS_ITEM_FLUSHING;
188 spin_lock(&lip->li_ailp->xa_lock);
195 * Unlock the dquot associated with the log item.
196 * Clear the fields of the dquot and dquot log item that
197 * are specific to the current transaction. If the
198 * hold flags is set, do not unlock the dquot.
201 xfs_qm_dquot_logitem_unlock(
202 struct xfs_log_item *lip)
204 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
206 ASSERT(XFS_DQ_IS_LOCKED(dqp));
209 * Clear the transaction pointer in the dquot
211 dqp->q_transp = NULL;
214 * dquots are never 'held' from getting unlocked at the end of
215 * a transaction. Their locking and unlocking is hidden inside the
216 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
223 * this needs to stamp an lsn into the dquot, I think.
224 * rpc's that look at user dquot's would then have to
225 * push on the dependency recorded in the dquot
228 xfs_qm_dquot_logitem_committing(
229 struct xfs_log_item *lip,
235 * This is the ops vector for dquots
237 static const struct xfs_item_ops xfs_dquot_item_ops = {
238 .iop_size = xfs_qm_dquot_logitem_size,
239 .iop_format = xfs_qm_dquot_logitem_format,
240 .iop_pin = xfs_qm_dquot_logitem_pin,
241 .iop_unpin = xfs_qm_dquot_logitem_unpin,
242 .iop_unlock = xfs_qm_dquot_logitem_unlock,
243 .iop_committed = xfs_qm_dquot_logitem_committed,
244 .iop_push = xfs_qm_dquot_logitem_push,
245 .iop_committing = xfs_qm_dquot_logitem_committing
249 * Initialize the dquot log item for a newly allocated dquot.
250 * The dquot isn't locked at this point, but it isn't on any of the lists
251 * either, so we don't care.
254 xfs_qm_dquot_logitem_init(
255 struct xfs_dquot *dqp)
257 struct xfs_dq_logitem *lp = &dqp->q_logitem;
259 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
260 &xfs_dquot_item_ops);
264 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
266 static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
268 return container_of(lip, struct xfs_qoff_logitem, qql_item);
273 * This returns the number of iovecs needed to log the given quotaoff item.
274 * We only need 1 iovec for an quotaoff item. It just logs the
275 * quotaoff_log_format structure.
278 xfs_qm_qoff_logitem_size(
279 struct xfs_log_item *lip,
284 *nbytes += sizeof(struct xfs_qoff_logitem);
288 xfs_qm_qoff_logitem_format(
289 struct xfs_log_item *lip,
290 struct xfs_log_vec *lv)
292 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
293 struct xfs_log_iovec *vecp = NULL;
294 struct xfs_qoff_logformat *qlf;
296 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
297 qlf->qf_type = XFS_LI_QUOTAOFF;
299 qlf->qf_flags = qflip->qql_flags;
300 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
304 * Pinning has no meaning for an quotaoff item, so just return.
307 xfs_qm_qoff_logitem_pin(
308 struct xfs_log_item *lip)
313 * Since pinning has no meaning for an quotaoff item, unpinning does
317 xfs_qm_qoff_logitem_unpin(
318 struct xfs_log_item *lip,
324 * There isn't much you can do to push a quotaoff item. It is simply
325 * stuck waiting for the log to be flushed to disk.
328 xfs_qm_qoff_logitem_push(
329 struct xfs_log_item *lip,
330 struct list_head *buffer_list)
332 return XFS_ITEM_LOCKED;
336 * Quotaoff items have no locking or pushing, so return failure
337 * so that the caller doesn't bother with us.
340 xfs_qm_qoff_logitem_unlock(
341 struct xfs_log_item *lip)
346 * The quotaoff-start-item is logged only once and cannot be moved in the log,
347 * so simply return the lsn at which it's been logged.
350 xfs_qm_qoff_logitem_committed(
351 struct xfs_log_item *lip,
358 xfs_qm_qoffend_logitem_committed(
359 struct xfs_log_item *lip,
362 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
363 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
364 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
367 * Delete the qoff-start logitem from the AIL.
368 * xfs_trans_ail_delete() drops the AIL lock.
370 spin_lock(&ailp->xa_lock);
371 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
375 return (xfs_lsn_t)-1;
379 * XXX rcc - don't know quite what to do with this. I think we can
380 * just ignore it. The only time that isn't the case is if we allow
381 * the client to somehow see that quotas have been turned off in which
382 * we can't allow that to get back until the quotaoff hits the disk.
383 * So how would that happen? Also, do we need different routines for
384 * quotaoff start and quotaoff end? I suspect the answer is yes but
385 * to be sure, I need to look at the recovery code and see how quota off
386 * recovery is handled (do we roll forward or back or do something else).
387 * If we roll forwards or backwards, then we need two separate routines,
388 * one that does nothing and one that stamps in the lsn that matters
389 * (truly makes the quotaoff irrevocable). If we do something else,
390 * then maybe we don't need two.
393 xfs_qm_qoff_logitem_committing(
394 struct xfs_log_item *lip,
395 xfs_lsn_t commit_lsn)
399 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
400 .iop_size = xfs_qm_qoff_logitem_size,
401 .iop_format = xfs_qm_qoff_logitem_format,
402 .iop_pin = xfs_qm_qoff_logitem_pin,
403 .iop_unpin = xfs_qm_qoff_logitem_unpin,
404 .iop_unlock = xfs_qm_qoff_logitem_unlock,
405 .iop_committed = xfs_qm_qoffend_logitem_committed,
406 .iop_push = xfs_qm_qoff_logitem_push,
407 .iop_committing = xfs_qm_qoff_logitem_committing
411 * This is the ops vector shared by all quotaoff-start log items.
413 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
414 .iop_size = xfs_qm_qoff_logitem_size,
415 .iop_format = xfs_qm_qoff_logitem_format,
416 .iop_pin = xfs_qm_qoff_logitem_pin,
417 .iop_unpin = xfs_qm_qoff_logitem_unpin,
418 .iop_unlock = xfs_qm_qoff_logitem_unlock,
419 .iop_committed = xfs_qm_qoff_logitem_committed,
420 .iop_push = xfs_qm_qoff_logitem_push,
421 .iop_committing = xfs_qm_qoff_logitem_committing
425 * Allocate and initialize an quotaoff item of the correct quota type(s).
427 struct xfs_qoff_logitem *
428 xfs_qm_qoff_logitem_init(
429 struct xfs_mount *mp,
430 struct xfs_qoff_logitem *start,
433 struct xfs_qoff_logitem *qf;
435 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
437 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
438 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
439 qf->qql_item.li_mountp = mp;
440 qf->qql_start_lip = start;
441 qf->qql_flags = flags;