Loading...
1/*
2 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_log.h"
21#include "xfs_trans.h"
22#include "xfs_sb.h"
23#include "xfs_ag.h"
24#include "xfs_alloc.h"
25#include "xfs_quota.h"
26#include "xfs_mount.h"
27#include "xfs_bmap_btree.h"
28#include "xfs_inode.h"
29#include "xfs_bmap.h"
30#include "xfs_rtalloc.h"
31#include "xfs_error.h"
32#include "xfs_itable.h"
33#include "xfs_attr.h"
34#include "xfs_buf_item.h"
35#include "xfs_trans_priv.h"
36#include "xfs_qm.h"
37
38static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
39{
40 return container_of(lip, struct xfs_dq_logitem, qli_item);
41}
42
43/*
44 * returns the number of iovecs needed to log the given dquot item.
45 */
46STATIC uint
47xfs_qm_dquot_logitem_size(
48 struct xfs_log_item *lip)
49{
50 /*
51 * we need only two iovecs, one for the format, one for the real thing
52 */
53 return 2;
54}
55
56/*
57 * fills in the vector of log iovecs for the given dquot log item.
58 */
59STATIC void
60xfs_qm_dquot_logitem_format(
61 struct xfs_log_item *lip,
62 struct xfs_log_iovec *logvec)
63{
64 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
65
66 logvec->i_addr = &qlip->qli_format;
67 logvec->i_len = sizeof(xfs_dq_logformat_t);
68 logvec->i_type = XLOG_REG_TYPE_QFORMAT;
69 logvec++;
70 logvec->i_addr = &qlip->qli_dquot->q_core;
71 logvec->i_len = sizeof(xfs_disk_dquot_t);
72 logvec->i_type = XLOG_REG_TYPE_DQUOT;
73
74 qlip->qli_format.qlf_size = 2;
75
76}
77
78/*
79 * Increment the pin count of the given dquot.
80 */
81STATIC void
82xfs_qm_dquot_logitem_pin(
83 struct xfs_log_item *lip)
84{
85 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
86
87 ASSERT(XFS_DQ_IS_LOCKED(dqp));
88 atomic_inc(&dqp->q_pincount);
89}
90
91/*
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().
96 */
97STATIC void
98xfs_qm_dquot_logitem_unpin(
99 struct xfs_log_item *lip,
100 int remove)
101{
102 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
103
104 ASSERT(atomic_read(&dqp->q_pincount) > 0);
105 if (atomic_dec_and_test(&dqp->q_pincount))
106 wake_up(&dqp->q_pinwait);
107}
108
109STATIC xfs_lsn_t
110xfs_qm_dquot_logitem_committed(
111 struct xfs_log_item *lip,
112 xfs_lsn_t lsn)
113{
114 /*
115 * We always re-log the entire dquot when it becomes dirty,
116 * so, the latest copy _is_ the only one that matters.
117 */
118 return lsn;
119}
120
121/*
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.
124 */
125void
126xfs_qm_dqunpin_wait(
127 struct xfs_dquot *dqp)
128{
129 ASSERT(XFS_DQ_IS_LOCKED(dqp));
130 if (atomic_read(&dqp->q_pincount) == 0)
131 return;
132
133 /*
134 * Give the log a push so we don't wait here too long.
135 */
136 xfs_log_force(dqp->q_mount, 0);
137 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
138}
139
140STATIC uint
141xfs_qm_dquot_logitem_push(
142 struct xfs_log_item *lip,
143 struct list_head *buffer_list)
144{
145 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
146 struct xfs_buf *bp = NULL;
147 uint rval = XFS_ITEM_SUCCESS;
148 int error;
149
150 if (atomic_read(&dqp->q_pincount) > 0)
151 return XFS_ITEM_PINNED;
152
153 if (!xfs_dqlock_nowait(dqp))
154 return XFS_ITEM_LOCKED;
155
156 /*
157 * Re-check the pincount now that we stabilized the value by
158 * taking the quota lock.
159 */
160 if (atomic_read(&dqp->q_pincount) > 0) {
161 rval = XFS_ITEM_PINNED;
162 goto out_unlock;
163 }
164
165 /*
166 * Someone else is already flushing the dquot. Nothing we can do
167 * here but wait for the flush to finish and remove the item from
168 * the AIL.
169 */
170 if (!xfs_dqflock_nowait(dqp)) {
171 rval = XFS_ITEM_FLUSHING;
172 goto out_unlock;
173 }
174
175 spin_unlock(&lip->li_ailp->xa_lock);
176
177 error = xfs_qm_dqflush(dqp, &bp);
178 if (error) {
179 xfs_warn(dqp->q_mount, "%s: push error %d on dqp %p",
180 __func__, error, dqp);
181 } else {
182 if (!xfs_buf_delwri_queue(bp, buffer_list))
183 rval = XFS_ITEM_FLUSHING;
184 xfs_buf_relse(bp);
185 }
186
187 spin_lock(&lip->li_ailp->xa_lock);
188out_unlock:
189 xfs_dqunlock(dqp);
190 return rval;
191}
192
193/*
194 * Unlock the dquot associated with the log item.
195 * Clear the fields of the dquot and dquot log item that
196 * are specific to the current transaction. If the
197 * hold flags is set, do not unlock the dquot.
198 */
199STATIC void
200xfs_qm_dquot_logitem_unlock(
201 struct xfs_log_item *lip)
202{
203 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
204
205 ASSERT(XFS_DQ_IS_LOCKED(dqp));
206
207 /*
208 * Clear the transaction pointer in the dquot
209 */
210 dqp->q_transp = NULL;
211
212 /*
213 * dquots are never 'held' from getting unlocked at the end of
214 * a transaction. Their locking and unlocking is hidden inside the
215 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
216 * for the logitem.
217 */
218 xfs_dqunlock(dqp);
219}
220
221/*
222 * this needs to stamp an lsn into the dquot, I think.
223 * rpc's that look at user dquot's would then have to
224 * push on the dependency recorded in the dquot
225 */
226STATIC void
227xfs_qm_dquot_logitem_committing(
228 struct xfs_log_item *lip,
229 xfs_lsn_t lsn)
230{
231}
232
233/*
234 * This is the ops vector for dquots
235 */
236static const struct xfs_item_ops xfs_dquot_item_ops = {
237 .iop_size = xfs_qm_dquot_logitem_size,
238 .iop_format = xfs_qm_dquot_logitem_format,
239 .iop_pin = xfs_qm_dquot_logitem_pin,
240 .iop_unpin = xfs_qm_dquot_logitem_unpin,
241 .iop_unlock = xfs_qm_dquot_logitem_unlock,
242 .iop_committed = xfs_qm_dquot_logitem_committed,
243 .iop_push = xfs_qm_dquot_logitem_push,
244 .iop_committing = xfs_qm_dquot_logitem_committing
245};
246
247/*
248 * Initialize the dquot log item for a newly allocated dquot.
249 * The dquot isn't locked at this point, but it isn't on any of the lists
250 * either, so we don't care.
251 */
252void
253xfs_qm_dquot_logitem_init(
254 struct xfs_dquot *dqp)
255{
256 struct xfs_dq_logitem *lp = &dqp->q_logitem;
257
258 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
259 &xfs_dquot_item_ops);
260 lp->qli_dquot = dqp;
261 lp->qli_format.qlf_type = XFS_LI_DQUOT;
262 lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
263 lp->qli_format.qlf_blkno = dqp->q_blkno;
264 lp->qli_format.qlf_len = 1;
265 /*
266 * This is just the offset of this dquot within its buffer
267 * (which is currently 1 FSB and probably won't change).
268 * Hence 32 bits for this offset should be just fine.
269 * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
270 * here, and recompute it at recovery time.
271 */
272 lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
273}
274
275/*------------------ QUOTAOFF LOG ITEMS -------------------*/
276
277static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
278{
279 return container_of(lip, struct xfs_qoff_logitem, qql_item);
280}
281
282
283/*
284 * This returns the number of iovecs needed to log the given quotaoff item.
285 * We only need 1 iovec for an quotaoff item. It just logs the
286 * quotaoff_log_format structure.
287 */
288STATIC uint
289xfs_qm_qoff_logitem_size(
290 struct xfs_log_item *lip)
291{
292 return 1;
293}
294
295/*
296 * This is called to fill in the vector of log iovecs for the
297 * given quotaoff log item. We use only 1 iovec, and we point that
298 * at the quotaoff_log_format structure embedded in the quotaoff item.
299 * It is at this point that we assert that all of the extent
300 * slots in the quotaoff item have been filled.
301 */
302STATIC void
303xfs_qm_qoff_logitem_format(
304 struct xfs_log_item *lip,
305 struct xfs_log_iovec *log_vector)
306{
307 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
308
309 ASSERT(qflip->qql_format.qf_type == XFS_LI_QUOTAOFF);
310
311 log_vector->i_addr = &qflip->qql_format;
312 log_vector->i_len = sizeof(xfs_qoff_logitem_t);
313 log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
314 qflip->qql_format.qf_size = 1;
315}
316
317/*
318 * Pinning has no meaning for an quotaoff item, so just return.
319 */
320STATIC void
321xfs_qm_qoff_logitem_pin(
322 struct xfs_log_item *lip)
323{
324}
325
326/*
327 * Since pinning has no meaning for an quotaoff item, unpinning does
328 * not either.
329 */
330STATIC void
331xfs_qm_qoff_logitem_unpin(
332 struct xfs_log_item *lip,
333 int remove)
334{
335}
336
337/*
338 * There isn't much you can do to push a quotaoff item. It is simply
339 * stuck waiting for the log to be flushed to disk.
340 */
341STATIC uint
342xfs_qm_qoff_logitem_push(
343 struct xfs_log_item *lip,
344 struct list_head *buffer_list)
345{
346 return XFS_ITEM_LOCKED;
347}
348
349/*
350 * Quotaoff items have no locking or pushing, so return failure
351 * so that the caller doesn't bother with us.
352 */
353STATIC void
354xfs_qm_qoff_logitem_unlock(
355 struct xfs_log_item *lip)
356{
357}
358
359/*
360 * The quotaoff-start-item is logged only once and cannot be moved in the log,
361 * so simply return the lsn at which it's been logged.
362 */
363STATIC xfs_lsn_t
364xfs_qm_qoff_logitem_committed(
365 struct xfs_log_item *lip,
366 xfs_lsn_t lsn)
367{
368 return lsn;
369}
370
371STATIC xfs_lsn_t
372xfs_qm_qoffend_logitem_committed(
373 struct xfs_log_item *lip,
374 xfs_lsn_t lsn)
375{
376 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
377 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
378 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
379
380 /*
381 * Delete the qoff-start logitem from the AIL.
382 * xfs_trans_ail_delete() drops the AIL lock.
383 */
384 spin_lock(&ailp->xa_lock);
385 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
386
387 kmem_free(qfs);
388 kmem_free(qfe);
389 return (xfs_lsn_t)-1;
390}
391
392/*
393 * XXX rcc - don't know quite what to do with this. I think we can
394 * just ignore it. The only time that isn't the case is if we allow
395 * the client to somehow see that quotas have been turned off in which
396 * we can't allow that to get back until the quotaoff hits the disk.
397 * So how would that happen? Also, do we need different routines for
398 * quotaoff start and quotaoff end? I suspect the answer is yes but
399 * to be sure, I need to look at the recovery code and see how quota off
400 * recovery is handled (do we roll forward or back or do something else).
401 * If we roll forwards or backwards, then we need two separate routines,
402 * one that does nothing and one that stamps in the lsn that matters
403 * (truly makes the quotaoff irrevocable). If we do something else,
404 * then maybe we don't need two.
405 */
406STATIC void
407xfs_qm_qoff_logitem_committing(
408 struct xfs_log_item *lip,
409 xfs_lsn_t commit_lsn)
410{
411}
412
413static const struct xfs_item_ops xfs_qm_qoffend_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_qoffend_logitem_committed,
420 .iop_push = xfs_qm_qoff_logitem_push,
421 .iop_committing = xfs_qm_qoff_logitem_committing
422};
423
424/*
425 * This is the ops vector shared by all quotaoff-start log items.
426 */
427static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
428 .iop_size = xfs_qm_qoff_logitem_size,
429 .iop_format = xfs_qm_qoff_logitem_format,
430 .iop_pin = xfs_qm_qoff_logitem_pin,
431 .iop_unpin = xfs_qm_qoff_logitem_unpin,
432 .iop_unlock = xfs_qm_qoff_logitem_unlock,
433 .iop_committed = xfs_qm_qoff_logitem_committed,
434 .iop_push = xfs_qm_qoff_logitem_push,
435 .iop_committing = xfs_qm_qoff_logitem_committing
436};
437
438/*
439 * Allocate and initialize an quotaoff item of the correct quota type(s).
440 */
441struct xfs_qoff_logitem *
442xfs_qm_qoff_logitem_init(
443 struct xfs_mount *mp,
444 struct xfs_qoff_logitem *start,
445 uint flags)
446{
447 struct xfs_qoff_logitem *qf;
448
449 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
450
451 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
452 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
453 qf->qql_item.li_mountp = mp;
454 qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
455 qf->qql_format.qf_flags = flags;
456 qf->qql_start_lip = start;
457 return qf;
458}
1/*
2 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
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"
30#include "xfs_qm.h"
31#include "xfs_log.h"
32
33static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
34{
35 return container_of(lip, struct xfs_dq_logitem, qli_item);
36}
37
38/*
39 * returns the number of iovecs needed to log the given dquot item.
40 */
41STATIC void
42xfs_qm_dquot_logitem_size(
43 struct xfs_log_item *lip,
44 int *nvecs,
45 int *nbytes)
46{
47 *nvecs += 2;
48 *nbytes += sizeof(struct xfs_dq_logformat) +
49 sizeof(struct xfs_disk_dquot);
50}
51
52/*
53 * fills in the vector of log iovecs for the given dquot log item.
54 */
55STATIC void
56xfs_qm_dquot_logitem_format(
57 struct xfs_log_item *lip,
58 struct xfs_log_vec *lv)
59{
60 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
61 struct xfs_log_iovec *vecp = NULL;
62 struct xfs_dq_logformat *qlf;
63
64 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
65 qlf->qlf_type = XFS_LI_DQUOT;
66 qlf->qlf_size = 2;
67 qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
68 qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
69 qlf->qlf_len = 1;
70 qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
71 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
72
73 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
74 &qlip->qli_dquot->q_core,
75 sizeof(struct xfs_disk_dquot));
76}
77
78/*
79 * Increment the pin count of the given dquot.
80 */
81STATIC void
82xfs_qm_dquot_logitem_pin(
83 struct xfs_log_item *lip)
84{
85 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
86
87 ASSERT(XFS_DQ_IS_LOCKED(dqp));
88 atomic_inc(&dqp->q_pincount);
89}
90
91/*
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().
96 */
97STATIC void
98xfs_qm_dquot_logitem_unpin(
99 struct xfs_log_item *lip,
100 int remove)
101{
102 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
103
104 ASSERT(atomic_read(&dqp->q_pincount) > 0);
105 if (atomic_dec_and_test(&dqp->q_pincount))
106 wake_up(&dqp->q_pinwait);
107}
108
109STATIC xfs_lsn_t
110xfs_qm_dquot_logitem_committed(
111 struct xfs_log_item *lip,
112 xfs_lsn_t lsn)
113{
114 /*
115 * We always re-log the entire dquot when it becomes dirty,
116 * so, the latest copy _is_ the only one that matters.
117 */
118 return lsn;
119}
120
121/*
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.
124 */
125void
126xfs_qm_dqunpin_wait(
127 struct xfs_dquot *dqp)
128{
129 ASSERT(XFS_DQ_IS_LOCKED(dqp));
130 if (atomic_read(&dqp->q_pincount) == 0)
131 return;
132
133 /*
134 * Give the log a push so we don't wait here too long.
135 */
136 xfs_log_force(dqp->q_mount, 0);
137 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
138}
139
140/*
141 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
142 * have been failed during writeback
143 *
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.
147 */
148STATIC void
149xfs_dquot_item_error(
150 struct xfs_log_item *lip,
151 struct xfs_buf *bp)
152{
153 ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
154 xfs_set_li_failed(lip, bp);
155}
156
157STATIC uint
158xfs_qm_dquot_logitem_push(
159 struct xfs_log_item *lip,
160 struct list_head *buffer_list)
161 __releases(&lip->li_ailp->ail_lock)
162 __acquires(&lip->li_ailp->ail_lock)
163{
164 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
165 struct xfs_buf *bp = lip->li_buf;
166 uint rval = XFS_ITEM_SUCCESS;
167 int error;
168
169 if (atomic_read(&dqp->q_pincount) > 0)
170 return XFS_ITEM_PINNED;
171
172 /*
173 * The buffer containing this item failed to be written back
174 * previously. Resubmit the buffer for IO
175 */
176 if (lip->li_flags & XFS_LI_FAILED) {
177 if (!xfs_buf_trylock(bp))
178 return XFS_ITEM_LOCKED;
179
180 if (!xfs_buf_resubmit_failed_buffers(bp, buffer_list))
181 rval = XFS_ITEM_FLUSHING;
182
183 xfs_buf_unlock(bp);
184 return rval;
185 }
186
187 if (!xfs_dqlock_nowait(dqp))
188 return XFS_ITEM_LOCKED;
189
190 /*
191 * Re-check the pincount now that we stabilized the value by
192 * taking the quota lock.
193 */
194 if (atomic_read(&dqp->q_pincount) > 0) {
195 rval = XFS_ITEM_PINNED;
196 goto out_unlock;
197 }
198
199 /*
200 * Someone else is already flushing the dquot. Nothing we can do
201 * here but wait for the flush to finish and remove the item from
202 * the AIL.
203 */
204 if (!xfs_dqflock_nowait(dqp)) {
205 rval = XFS_ITEM_FLUSHING;
206 goto out_unlock;
207 }
208
209 spin_unlock(&lip->li_ailp->ail_lock);
210
211 error = xfs_qm_dqflush(dqp, &bp);
212 if (error) {
213 xfs_warn(dqp->q_mount, "%s: push error %d on dqp "PTR_FMT,
214 __func__, error, dqp);
215 } else {
216 if (!xfs_buf_delwri_queue(bp, buffer_list))
217 rval = XFS_ITEM_FLUSHING;
218 xfs_buf_relse(bp);
219 }
220
221 spin_lock(&lip->li_ailp->ail_lock);
222out_unlock:
223 xfs_dqunlock(dqp);
224 return rval;
225}
226
227/*
228 * Unlock the dquot associated with the log item.
229 * Clear the fields of the dquot and dquot log item that
230 * are specific to the current transaction. If the
231 * hold flags is set, do not unlock the dquot.
232 */
233STATIC void
234xfs_qm_dquot_logitem_unlock(
235 struct xfs_log_item *lip)
236{
237 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
238
239 ASSERT(XFS_DQ_IS_LOCKED(dqp));
240
241 /*
242 * Clear the transaction pointer in the dquot
243 */
244 dqp->q_transp = NULL;
245
246 /*
247 * dquots are never 'held' from getting unlocked at the end of
248 * a transaction. Their locking and unlocking is hidden inside the
249 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
250 * for the logitem.
251 */
252 xfs_dqunlock(dqp);
253}
254
255/*
256 * this needs to stamp an lsn into the dquot, I think.
257 * rpc's that look at user dquot's would then have to
258 * push on the dependency recorded in the dquot
259 */
260STATIC void
261xfs_qm_dquot_logitem_committing(
262 struct xfs_log_item *lip,
263 xfs_lsn_t lsn)
264{
265}
266
267/*
268 * This is the ops vector for dquots
269 */
270static const struct xfs_item_ops xfs_dquot_item_ops = {
271 .iop_size = xfs_qm_dquot_logitem_size,
272 .iop_format = xfs_qm_dquot_logitem_format,
273 .iop_pin = xfs_qm_dquot_logitem_pin,
274 .iop_unpin = xfs_qm_dquot_logitem_unpin,
275 .iop_unlock = xfs_qm_dquot_logitem_unlock,
276 .iop_committed = xfs_qm_dquot_logitem_committed,
277 .iop_push = xfs_qm_dquot_logitem_push,
278 .iop_committing = xfs_qm_dquot_logitem_committing,
279 .iop_error = xfs_dquot_item_error
280};
281
282/*
283 * Initialize the dquot log item for a newly allocated dquot.
284 * The dquot isn't locked at this point, but it isn't on any of the lists
285 * either, so we don't care.
286 */
287void
288xfs_qm_dquot_logitem_init(
289 struct xfs_dquot *dqp)
290{
291 struct xfs_dq_logitem *lp = &dqp->q_logitem;
292
293 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
294 &xfs_dquot_item_ops);
295 lp->qli_dquot = dqp;
296}
297
298/*------------------ QUOTAOFF LOG ITEMS -------------------*/
299
300static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
301{
302 return container_of(lip, struct xfs_qoff_logitem, qql_item);
303}
304
305
306/*
307 * This returns the number of iovecs needed to log the given quotaoff item.
308 * We only need 1 iovec for an quotaoff item. It just logs the
309 * quotaoff_log_format structure.
310 */
311STATIC void
312xfs_qm_qoff_logitem_size(
313 struct xfs_log_item *lip,
314 int *nvecs,
315 int *nbytes)
316{
317 *nvecs += 1;
318 *nbytes += sizeof(struct xfs_qoff_logitem);
319}
320
321STATIC void
322xfs_qm_qoff_logitem_format(
323 struct xfs_log_item *lip,
324 struct xfs_log_vec *lv)
325{
326 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
327 struct xfs_log_iovec *vecp = NULL;
328 struct xfs_qoff_logformat *qlf;
329
330 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
331 qlf->qf_type = XFS_LI_QUOTAOFF;
332 qlf->qf_size = 1;
333 qlf->qf_flags = qflip->qql_flags;
334 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
335}
336
337/*
338 * Pinning has no meaning for an quotaoff item, so just return.
339 */
340STATIC void
341xfs_qm_qoff_logitem_pin(
342 struct xfs_log_item *lip)
343{
344}
345
346/*
347 * Since pinning has no meaning for an quotaoff item, unpinning does
348 * not either.
349 */
350STATIC void
351xfs_qm_qoff_logitem_unpin(
352 struct xfs_log_item *lip,
353 int remove)
354{
355}
356
357/*
358 * There isn't much you can do to push a quotaoff item. It is simply
359 * stuck waiting for the log to be flushed to disk.
360 */
361STATIC uint
362xfs_qm_qoff_logitem_push(
363 struct xfs_log_item *lip,
364 struct list_head *buffer_list)
365{
366 return XFS_ITEM_LOCKED;
367}
368
369/*
370 * Quotaoff items have no locking or pushing, so return failure
371 * so that the caller doesn't bother with us.
372 */
373STATIC void
374xfs_qm_qoff_logitem_unlock(
375 struct xfs_log_item *lip)
376{
377}
378
379/*
380 * The quotaoff-start-item is logged only once and cannot be moved in the log,
381 * so simply return the lsn at which it's been logged.
382 */
383STATIC xfs_lsn_t
384xfs_qm_qoff_logitem_committed(
385 struct xfs_log_item *lip,
386 xfs_lsn_t lsn)
387{
388 return lsn;
389}
390
391STATIC xfs_lsn_t
392xfs_qm_qoffend_logitem_committed(
393 struct xfs_log_item *lip,
394 xfs_lsn_t lsn)
395{
396 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
397 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
398 struct xfs_ail *ailp = qfs->qql_item.li_ailp;
399
400 /*
401 * Delete the qoff-start logitem from the AIL.
402 * xfs_trans_ail_delete() drops the AIL lock.
403 */
404 spin_lock(&ailp->ail_lock);
405 xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR);
406
407 kmem_free(qfs->qql_item.li_lv_shadow);
408 kmem_free(lip->li_lv_shadow);
409 kmem_free(qfs);
410 kmem_free(qfe);
411 return (xfs_lsn_t)-1;
412}
413
414/*
415 * XXX rcc - don't know quite what to do with this. I think we can
416 * just ignore it. The only time that isn't the case is if we allow
417 * the client to somehow see that quotas have been turned off in which
418 * we can't allow that to get back until the quotaoff hits the disk.
419 * So how would that happen? Also, do we need different routines for
420 * quotaoff start and quotaoff end? I suspect the answer is yes but
421 * to be sure, I need to look at the recovery code and see how quota off
422 * recovery is handled (do we roll forward or back or do something else).
423 * If we roll forwards or backwards, then we need two separate routines,
424 * one that does nothing and one that stamps in the lsn that matters
425 * (truly makes the quotaoff irrevocable). If we do something else,
426 * then maybe we don't need two.
427 */
428STATIC void
429xfs_qm_qoff_logitem_committing(
430 struct xfs_log_item *lip,
431 xfs_lsn_t commit_lsn)
432{
433}
434
435static const struct xfs_item_ops xfs_qm_qoffend_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_qoffend_logitem_committed,
442 .iop_push = xfs_qm_qoff_logitem_push,
443 .iop_committing = xfs_qm_qoff_logitem_committing
444};
445
446/*
447 * This is the ops vector shared by all quotaoff-start log items.
448 */
449static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
450 .iop_size = xfs_qm_qoff_logitem_size,
451 .iop_format = xfs_qm_qoff_logitem_format,
452 .iop_pin = xfs_qm_qoff_logitem_pin,
453 .iop_unpin = xfs_qm_qoff_logitem_unpin,
454 .iop_unlock = xfs_qm_qoff_logitem_unlock,
455 .iop_committed = xfs_qm_qoff_logitem_committed,
456 .iop_push = xfs_qm_qoff_logitem_push,
457 .iop_committing = xfs_qm_qoff_logitem_committing
458};
459
460/*
461 * Allocate and initialize an quotaoff item of the correct quota type(s).
462 */
463struct xfs_qoff_logitem *
464xfs_qm_qoff_logitem_init(
465 struct xfs_mount *mp,
466 struct xfs_qoff_logitem *start,
467 uint flags)
468{
469 struct xfs_qoff_logitem *qf;
470
471 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP);
472
473 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
474 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
475 qf->qql_item.li_mountp = mp;
476 qf->qql_start_lip = start;
477 qf->qql_flags = flags;
478 return qf;
479}