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"
25 #include "xfs_alloc.h"
26 #include "xfs_quota.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_inode.h"
31 #include "xfs_rtalloc.h"
32 #include "xfs_error.h"
33 #include "xfs_itable.h"
35 #include "xfs_trans.h"
36 #include "xfs_buf_item.h"
37 #include "xfs_trans_priv.h"
41 static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
43 return container_of(lip, struct xfs_dq_logitem, qli_item);
47 * returns the number of iovecs needed to log the given dquot item.
50 xfs_qm_dquot_logitem_size(
51 struct xfs_log_item *lip,
56 *nbytes += sizeof(struct xfs_dq_logformat) +
57 sizeof(struct xfs_disk_dquot);
61 * fills in the vector of log iovecs for the given dquot log item.
64 xfs_qm_dquot_logitem_format(
65 struct xfs_log_item *lip,
66 struct xfs_log_iovec *logvec)
68 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
70 logvec->i_addr = &qlip->qli_format;
71 logvec->i_len = sizeof(xfs_dq_logformat_t);
72 logvec->i_type = XLOG_REG_TYPE_QFORMAT;
74 logvec->i_addr = &qlip->qli_dquot->q_core;
75 logvec->i_len = sizeof(xfs_disk_dquot_t);
76 logvec->i_type = XLOG_REG_TYPE_DQUOT;
78 qlip->qli_format.qlf_size = 2;
83 * Increment the pin count of the given dquot.
86 xfs_qm_dquot_logitem_pin(
87 struct xfs_log_item *lip)
89 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
91 ASSERT(XFS_DQ_IS_LOCKED(dqp));
92 atomic_inc(&dqp->q_pincount);
96 * Decrement the pin count of the given dquot, and wake up
97 * anyone in xfs_dqwait_unpin() if the count goes to 0. The
98 * dquot must have been previously pinned with a call to
99 * xfs_qm_dquot_logitem_pin().
102 xfs_qm_dquot_logitem_unpin(
103 struct xfs_log_item *lip,
106 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
108 ASSERT(atomic_read(&dqp->q_pincount) > 0);
109 if (atomic_dec_and_test(&dqp->q_pincount))
110 wake_up(&dqp->q_pinwait);
114 xfs_qm_dquot_logitem_committed(
115 struct xfs_log_item *lip,
119 * We always re-log the entire dquot when it becomes dirty,
120 * so, the latest copy _is_ the only one that matters.
126 * This is called to wait for the given dquot to be unpinned.
127 * Most of these pin/unpin routines are plagiarized from inode code.
131 struct xfs_dquot *dqp)
133 ASSERT(XFS_DQ_IS_LOCKED(dqp));
134 if (atomic_read(&dqp->q_pincount) == 0)
138 * Give the log a push so we don't wait here too long.
140 xfs_log_force(dqp->q_mount, 0);
141 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
145 xfs_qm_dquot_logitem_push(
146 struct xfs_log_item *lip,
147 struct list_head *buffer_list) __releases(&lip->li_ailp->xa_lock)
148 __acquires(&lip->li_ailp->xa_lock)
150 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
151 struct xfs_buf *bp = NULL;
152 uint rval = XFS_ITEM_SUCCESS;
155 if (atomic_read(&dqp->q_pincount) > 0)
156 return XFS_ITEM_PINNED;
158 if (!xfs_dqlock_nowait(dqp))
159 return XFS_ITEM_LOCKED;
162 * Re-check the pincount now that we stabilized the value by
163 * taking the quota lock.
165 if (atomic_read(&dqp->q_pincount) > 0) {
166 rval = XFS_ITEM_PINNED;
171 * Someone else is already flushing the dquot. Nothing we can do
172 * here but wait for the flush to finish and remove the item from
175 if (!xfs_dqflock_nowait(dqp)) {
176 rval = XFS_ITEM_FLUSHING;
180 spin_unlock(&lip->li_ailp->xa_lock);
182 error = xfs_qm_dqflush(dqp, &bp);
184 xfs_warn(dqp->q_mount, "%s: push error %d on dqp %p",
185 __func__, error, dqp);
187 if (!xfs_buf_delwri_queue(bp, buffer_list))
188 rval = XFS_ITEM_FLUSHING;
192 spin_lock(&lip->li_ailp->xa_lock);
199 * Unlock the dquot associated with the log item.
200 * Clear the fields of the dquot and dquot log item that
201 * are specific to the current transaction. If the
202 * hold flags is set, do not unlock the dquot.
205 xfs_qm_dquot_logitem_unlock(
206 struct xfs_log_item *lip)
208 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
210 ASSERT(XFS_DQ_IS_LOCKED(dqp));
213 * Clear the transaction pointer in the dquot
215 dqp->q_transp = NULL;
218 * dquots are never 'held' from getting unlocked at the end of
219 * a transaction. Their locking and unlocking is hidden inside the
220 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
227 * this needs to stamp an lsn into the dquot, I think.
228 * rpc's that look at user dquot's would then have to
229 * push on the dependency recorded in the dquot
232 xfs_qm_dquot_logitem_committing(
233 struct xfs_log_item *lip,
239 * This is the ops vector for dquots
241 static const struct xfs_item_ops xfs_dquot_item_ops = {
242 .iop_size = xfs_qm_dquot_logitem_size,
243 .iop_format = xfs_qm_dquot_logitem_format,
244 .iop_pin = xfs_qm_dquot_logitem_pin,
245 .iop_unpin = xfs_qm_dquot_logitem_unpin,
246 .iop_unlock = xfs_qm_dquot_logitem_unlock,
247 .iop_committed = xfs_qm_dquot_logitem_committed,
248 .iop_push = xfs_qm_dquot_logitem_push,
249 .iop_committing = xfs_qm_dquot_logitem_committing
253 * Initialize the dquot log item for a newly allocated dquot.
254 * The dquot isn't locked at this point, but it isn't on any of the lists
255 * either, so we don't care.
258 xfs_qm_dquot_logitem_init(
259 struct xfs_dquot *dqp)
261 struct xfs_dq_logitem *lp = &dqp->q_logitem;
263 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
264 &xfs_dquot_item_ops);
266 lp->qli_format.qlf_type = XFS_LI_DQUOT;
267 lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
268 lp->qli_format.qlf_blkno = dqp->q_blkno;
269 lp->qli_format.qlf_len = 1;
271 * This is just the offset of this dquot within its buffer
272 * (which is currently 1 FSB and probably won't change).
273 * Hence 32 bits for this offset should be just fine.
274 * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
275 * here, and recompute it at recovery time.
277 lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
280 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
282 static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
284 return container_of(lip, struct xfs_qoff_logitem, qql_item);
289 * This returns the number of iovecs needed to log the given quotaoff item.
290 * We only need 1 iovec for an quotaoff item. It just logs the
291 * quotaoff_log_format structure.
294 xfs_qm_qoff_logitem_size(
295 struct xfs_log_item *lip,
300 *nbytes += sizeof(struct xfs_qoff_logitem);
304 * This is called to fill in the vector of log iovecs for the
305 * given quotaoff log item. We use only 1 iovec, and we point that
306 * at the quotaoff_log_format structure embedded in the quotaoff item.
307 * It is at this point that we assert that all of the extent
308 * slots in the quotaoff item have been filled.
311 xfs_qm_qoff_logitem_format(
312 struct xfs_log_item *lip,
313 struct xfs_log_iovec *log_vector)
315 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
317 ASSERT(qflip->qql_format.qf_type == XFS_LI_QUOTAOFF);
319 log_vector->i_addr = &qflip->qql_format;
320 log_vector->i_len = sizeof(xfs_qoff_logitem_t);
321 log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
322 qflip->qql_format.qf_size = 1;
326 * Pinning has no meaning for an quotaoff item, so just return.
329 xfs_qm_qoff_logitem_pin(
330 struct xfs_log_item *lip)
335 * Since pinning has no meaning for an quotaoff item, unpinning does
339 xfs_qm_qoff_logitem_unpin(
340 struct xfs_log_item *lip,
346 * There isn't much you can do to push a quotaoff item. It is simply
347 * stuck waiting for the log to be flushed to disk.
350 xfs_qm_qoff_logitem_push(
351 struct xfs_log_item *lip,
352 struct list_head *buffer_list)
354 return XFS_ITEM_LOCKED;
358 * Quotaoff items have no locking or pushing, so return failure
359 * so that the caller doesn't bother with us.
362 xfs_qm_qoff_logitem_unlock(
363 struct xfs_log_item *lip)
368 * The quotaoff-start-item is logged only once and cannot be moved in the log,
369 * so simply return the lsn at which it's been logged.
372 xfs_qm_qoff_logitem_committed(
373 struct xfs_log_item *lip,
380 xfs_qm_qoffend_logitem_committed(
381 struct xfs_log_item *lip,
384 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
385 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
386 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
389 * Delete the qoff-start logitem from the AIL.
390 * xfs_trans_ail_delete() drops the AIL lock.
392 spin_lock(&ailp->xa_lock);
393 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
397 return (xfs_lsn_t)-1;
401 * XXX rcc - don't know quite what to do with this. I think we can
402 * just ignore it. The only time that isn't the case is if we allow
403 * the client to somehow see that quotas have been turned off in which
404 * we can't allow that to get back until the quotaoff hits the disk.
405 * So how would that happen? Also, do we need different routines for
406 * quotaoff start and quotaoff end? I suspect the answer is yes but
407 * to be sure, I need to look at the recovery code and see how quota off
408 * recovery is handled (do we roll forward or back or do something else).
409 * If we roll forwards or backwards, then we need two separate routines,
410 * one that does nothing and one that stamps in the lsn that matters
411 * (truly makes the quotaoff irrevocable). If we do something else,
412 * then maybe we don't need two.
415 xfs_qm_qoff_logitem_committing(
416 struct xfs_log_item *lip,
417 xfs_lsn_t commit_lsn)
421 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
422 .iop_size = xfs_qm_qoff_logitem_size,
423 .iop_format = xfs_qm_qoff_logitem_format,
424 .iop_pin = xfs_qm_qoff_logitem_pin,
425 .iop_unpin = xfs_qm_qoff_logitem_unpin,
426 .iop_unlock = xfs_qm_qoff_logitem_unlock,
427 .iop_committed = xfs_qm_qoffend_logitem_committed,
428 .iop_push = xfs_qm_qoff_logitem_push,
429 .iop_committing = xfs_qm_qoff_logitem_committing
433 * This is the ops vector shared by all quotaoff-start log items.
435 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
436 .iop_size = xfs_qm_qoff_logitem_size,
437 .iop_format = xfs_qm_qoff_logitem_format,
438 .iop_pin = xfs_qm_qoff_logitem_pin,
439 .iop_unpin = xfs_qm_qoff_logitem_unpin,
440 .iop_unlock = xfs_qm_qoff_logitem_unlock,
441 .iop_committed = xfs_qm_qoff_logitem_committed,
442 .iop_push = xfs_qm_qoff_logitem_push,
443 .iop_committing = xfs_qm_qoff_logitem_committing
447 * Allocate and initialize an quotaoff item of the correct quota type(s).
449 struct xfs_qoff_logitem *
450 xfs_qm_qoff_logitem_init(
451 struct xfs_mount *mp,
452 struct xfs_qoff_logitem *start,
455 struct xfs_qoff_logitem *qf;
457 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
459 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
460 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
461 qf->qql_item.li_mountp = mp;
462 qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
463 qf->qql_format.qf_flags = flags;
464 qf->qql_start_lip = start;