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"
22 #include "xfs_trans.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_buf_item.h"
36 #include "xfs_trans_priv.h"
39 static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
41 return container_of(lip, struct xfs_dq_logitem, qli_item);
45 * returns the number of iovecs needed to log the given dquot item.
48 xfs_qm_dquot_logitem_size(
49 struct xfs_log_item *lip,
54 *nbytes += sizeof(struct xfs_dq_logformat) +
55 sizeof(struct xfs_disk_dquot);
59 * fills in the vector of log iovecs for the given dquot log item.
62 xfs_qm_dquot_logitem_format(
63 struct xfs_log_item *lip,
64 struct xfs_log_iovec *logvec)
66 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
68 logvec->i_addr = &qlip->qli_format;
69 logvec->i_len = sizeof(xfs_dq_logformat_t);
70 logvec->i_type = XLOG_REG_TYPE_QFORMAT;
72 logvec->i_addr = &qlip->qli_dquot->q_core;
73 logvec->i_len = sizeof(xfs_disk_dquot_t);
74 logvec->i_type = XLOG_REG_TYPE_DQUOT;
76 qlip->qli_format.qlf_size = 2;
81 * Increment the pin count of the given dquot.
84 xfs_qm_dquot_logitem_pin(
85 struct xfs_log_item *lip)
87 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
89 ASSERT(XFS_DQ_IS_LOCKED(dqp));
90 atomic_inc(&dqp->q_pincount);
94 * Decrement the pin count of the given dquot, and wake up
95 * anyone in xfs_dqwait_unpin() if the count goes to 0. The
96 * dquot must have been previously pinned with a call to
97 * xfs_qm_dquot_logitem_pin().
100 xfs_qm_dquot_logitem_unpin(
101 struct xfs_log_item *lip,
104 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
106 ASSERT(atomic_read(&dqp->q_pincount) > 0);
107 if (atomic_dec_and_test(&dqp->q_pincount))
108 wake_up(&dqp->q_pinwait);
112 xfs_qm_dquot_logitem_committed(
113 struct xfs_log_item *lip,
117 * We always re-log the entire dquot when it becomes dirty,
118 * so, the latest copy _is_ the only one that matters.
124 * This is called to wait for the given dquot to be unpinned.
125 * Most of these pin/unpin routines are plagiarized from inode code.
129 struct xfs_dquot *dqp)
131 ASSERT(XFS_DQ_IS_LOCKED(dqp));
132 if (atomic_read(&dqp->q_pincount) == 0)
136 * Give the log a push so we don't wait here too long.
138 xfs_log_force(dqp->q_mount, 0);
139 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
143 xfs_qm_dquot_logitem_push(
144 struct xfs_log_item *lip,
145 struct list_head *buffer_list)
147 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
148 struct xfs_buf *bp = NULL;
149 uint rval = XFS_ITEM_SUCCESS;
152 if (atomic_read(&dqp->q_pincount) > 0)
153 return XFS_ITEM_PINNED;
155 if (!xfs_dqlock_nowait(dqp))
156 return XFS_ITEM_LOCKED;
159 * Re-check the pincount now that we stabilized the value by
160 * taking the quota lock.
162 if (atomic_read(&dqp->q_pincount) > 0) {
163 rval = XFS_ITEM_PINNED;
168 * Someone else is already flushing the dquot. Nothing we can do
169 * here but wait for the flush to finish and remove the item from
172 if (!xfs_dqflock_nowait(dqp)) {
173 rval = XFS_ITEM_FLUSHING;
177 spin_unlock(&lip->li_ailp->xa_lock);
179 error = xfs_qm_dqflush(dqp, &bp);
181 xfs_warn(dqp->q_mount, "%s: push error %d on dqp %p",
182 __func__, error, dqp);
184 if (!xfs_buf_delwri_queue(bp, buffer_list))
185 rval = XFS_ITEM_FLUSHING;
189 spin_lock(&lip->li_ailp->xa_lock);
196 * Unlock the dquot associated with the log item.
197 * Clear the fields of the dquot and dquot log item that
198 * are specific to the current transaction. If the
199 * hold flags is set, do not unlock the dquot.
202 xfs_qm_dquot_logitem_unlock(
203 struct xfs_log_item *lip)
205 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
207 ASSERT(XFS_DQ_IS_LOCKED(dqp));
210 * Clear the transaction pointer in the dquot
212 dqp->q_transp = NULL;
215 * dquots are never 'held' from getting unlocked at the end of
216 * a transaction. Their locking and unlocking is hidden inside the
217 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
224 * this needs to stamp an lsn into the dquot, I think.
225 * rpc's that look at user dquot's would then have to
226 * push on the dependency recorded in the dquot
229 xfs_qm_dquot_logitem_committing(
230 struct xfs_log_item *lip,
236 * This is the ops vector for dquots
238 static const struct xfs_item_ops xfs_dquot_item_ops = {
239 .iop_size = xfs_qm_dquot_logitem_size,
240 .iop_format = xfs_qm_dquot_logitem_format,
241 .iop_pin = xfs_qm_dquot_logitem_pin,
242 .iop_unpin = xfs_qm_dquot_logitem_unpin,
243 .iop_unlock = xfs_qm_dquot_logitem_unlock,
244 .iop_committed = xfs_qm_dquot_logitem_committed,
245 .iop_push = xfs_qm_dquot_logitem_push,
246 .iop_committing = xfs_qm_dquot_logitem_committing
250 * Initialize the dquot log item for a newly allocated dquot.
251 * The dquot isn't locked at this point, but it isn't on any of the lists
252 * either, so we don't care.
255 xfs_qm_dquot_logitem_init(
256 struct xfs_dquot *dqp)
258 struct xfs_dq_logitem *lp = &dqp->q_logitem;
260 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
261 &xfs_dquot_item_ops);
263 lp->qli_format.qlf_type = XFS_LI_DQUOT;
264 lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
265 lp->qli_format.qlf_blkno = dqp->q_blkno;
266 lp->qli_format.qlf_len = 1;
268 * This is just the offset of this dquot within its buffer
269 * (which is currently 1 FSB and probably won't change).
270 * Hence 32 bits for this offset should be just fine.
271 * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
272 * here, and recompute it at recovery time.
274 lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
277 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
279 static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
281 return container_of(lip, struct xfs_qoff_logitem, qql_item);
286 * This returns the number of iovecs needed to log the given quotaoff item.
287 * We only need 1 iovec for an quotaoff item. It just logs the
288 * quotaoff_log_format structure.
291 xfs_qm_qoff_logitem_size(
292 struct xfs_log_item *lip,
297 *nbytes += sizeof(struct xfs_qoff_logitem);
301 * This is called to fill in the vector of log iovecs for the
302 * given quotaoff log item. We use only 1 iovec, and we point that
303 * at the quotaoff_log_format structure embedded in the quotaoff item.
304 * It is at this point that we assert that all of the extent
305 * slots in the quotaoff item have been filled.
308 xfs_qm_qoff_logitem_format(
309 struct xfs_log_item *lip,
310 struct xfs_log_iovec *log_vector)
312 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
314 ASSERT(qflip->qql_format.qf_type == XFS_LI_QUOTAOFF);
316 log_vector->i_addr = &qflip->qql_format;
317 log_vector->i_len = sizeof(xfs_qoff_logitem_t);
318 log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
319 qflip->qql_format.qf_size = 1;
323 * Pinning has no meaning for an quotaoff item, so just return.
326 xfs_qm_qoff_logitem_pin(
327 struct xfs_log_item *lip)
332 * Since pinning has no meaning for an quotaoff item, unpinning does
336 xfs_qm_qoff_logitem_unpin(
337 struct xfs_log_item *lip,
343 * There isn't much you can do to push a quotaoff item. It is simply
344 * stuck waiting for the log to be flushed to disk.
347 xfs_qm_qoff_logitem_push(
348 struct xfs_log_item *lip,
349 struct list_head *buffer_list)
351 return XFS_ITEM_LOCKED;
355 * Quotaoff items have no locking or pushing, so return failure
356 * so that the caller doesn't bother with us.
359 xfs_qm_qoff_logitem_unlock(
360 struct xfs_log_item *lip)
365 * The quotaoff-start-item is logged only once and cannot be moved in the log,
366 * so simply return the lsn at which it's been logged.
369 xfs_qm_qoff_logitem_committed(
370 struct xfs_log_item *lip,
377 xfs_qm_qoffend_logitem_committed(
378 struct xfs_log_item *lip,
381 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
382 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
383 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
386 * Delete the qoff-start logitem from the AIL.
387 * xfs_trans_ail_delete() drops the AIL lock.
389 spin_lock(&ailp->xa_lock);
390 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
394 return (xfs_lsn_t)-1;
398 * XXX rcc - don't know quite what to do with this. I think we can
399 * just ignore it. The only time that isn't the case is if we allow
400 * the client to somehow see that quotas have been turned off in which
401 * we can't allow that to get back until the quotaoff hits the disk.
402 * So how would that happen? Also, do we need different routines for
403 * quotaoff start and quotaoff end? I suspect the answer is yes but
404 * to be sure, I need to look at the recovery code and see how quota off
405 * recovery is handled (do we roll forward or back or do something else).
406 * If we roll forwards or backwards, then we need two separate routines,
407 * one that does nothing and one that stamps in the lsn that matters
408 * (truly makes the quotaoff irrevocable). If we do something else,
409 * then maybe we don't need two.
412 xfs_qm_qoff_logitem_committing(
413 struct xfs_log_item *lip,
414 xfs_lsn_t commit_lsn)
418 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
419 .iop_size = xfs_qm_qoff_logitem_size,
420 .iop_format = xfs_qm_qoff_logitem_format,
421 .iop_pin = xfs_qm_qoff_logitem_pin,
422 .iop_unpin = xfs_qm_qoff_logitem_unpin,
423 .iop_unlock = xfs_qm_qoff_logitem_unlock,
424 .iop_committed = xfs_qm_qoffend_logitem_committed,
425 .iop_push = xfs_qm_qoff_logitem_push,
426 .iop_committing = xfs_qm_qoff_logitem_committing
430 * This is the ops vector shared by all quotaoff-start log items.
432 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
433 .iop_size = xfs_qm_qoff_logitem_size,
434 .iop_format = xfs_qm_qoff_logitem_format,
435 .iop_pin = xfs_qm_qoff_logitem_pin,
436 .iop_unpin = xfs_qm_qoff_logitem_unpin,
437 .iop_unlock = xfs_qm_qoff_logitem_unlock,
438 .iop_committed = xfs_qm_qoff_logitem_committed,
439 .iop_push = xfs_qm_qoff_logitem_push,
440 .iop_committing = xfs_qm_qoff_logitem_committing
444 * Allocate and initialize an quotaoff item of the correct quota type(s).
446 struct xfs_qoff_logitem *
447 xfs_qm_qoff_logitem_init(
448 struct xfs_mount *mp,
449 struct xfs_qoff_logitem *start,
452 struct xfs_qoff_logitem *qf;
454 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
456 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
457 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
458 qf->qql_item.li_mountp = mp;
459 qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
460 qf->qql_format.qf_flags = flags;
461 qf->qql_start_lip = start;