1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_quota.h"
15 #include "xfs_trans.h"
16 #include "xfs_buf_item.h"
17 #include "xfs_trans_priv.h"
21 static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip)
23 return container_of(lip, struct xfs_dq_logitem, qli_item);
27 * returns the number of iovecs needed to log the given dquot item.
30 xfs_qm_dquot_logitem_size(
31 struct xfs_log_item *lip,
36 *nbytes += sizeof(struct xfs_dq_logformat) +
37 sizeof(struct xfs_disk_dquot);
41 * fills in the vector of log iovecs for the given dquot log item.
44 xfs_qm_dquot_logitem_format(
45 struct xfs_log_item *lip,
46 struct xfs_log_vec *lv)
48 struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
49 struct xfs_log_iovec *vecp = NULL;
50 struct xfs_dq_logformat *qlf;
52 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
53 qlf->qlf_type = XFS_LI_DQUOT;
55 qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
56 qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
58 qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
59 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat));
61 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT,
62 &qlip->qli_dquot->q_core,
63 sizeof(struct xfs_disk_dquot));
67 * Increment the pin count of the given dquot.
70 xfs_qm_dquot_logitem_pin(
71 struct xfs_log_item *lip)
73 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
75 ASSERT(XFS_DQ_IS_LOCKED(dqp));
76 atomic_inc(&dqp->q_pincount);
80 * Decrement the pin count of the given dquot, and wake up
81 * anyone in xfs_dqwait_unpin() if the count goes to 0. The
82 * dquot must have been previously pinned with a call to
83 * xfs_qm_dquot_logitem_pin().
86 xfs_qm_dquot_logitem_unpin(
87 struct xfs_log_item *lip,
90 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
92 ASSERT(atomic_read(&dqp->q_pincount) > 0);
93 if (atomic_dec_and_test(&dqp->q_pincount))
94 wake_up(&dqp->q_pinwait);
98 * This is called to wait for the given dquot to be unpinned.
99 * Most of these pin/unpin routines are plagiarized from inode code.
103 struct xfs_dquot *dqp)
105 ASSERT(XFS_DQ_IS_LOCKED(dqp));
106 if (atomic_read(&dqp->q_pincount) == 0)
110 * Give the log a push so we don't wait here too long.
112 xfs_log_force(dqp->q_mount, 0);
113 wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
117 * Callback used to mark a buffer with XFS_LI_FAILED when items in the buffer
118 * have been failed during writeback
120 * this informs the AIL that the dquot is already flush locked on the next push,
121 * and acquires a hold on the buffer to ensure that it isn't reclaimed before
122 * dirty data makes it to disk.
125 xfs_dquot_item_error(
126 struct xfs_log_item *lip,
129 ASSERT(!completion_done(&DQUOT_ITEM(lip)->qli_dquot->q_flush));
130 xfs_set_li_failed(lip, bp);
134 xfs_qm_dquot_logitem_push(
135 struct xfs_log_item *lip,
136 struct list_head *buffer_list)
137 __releases(&lip->li_ailp->ail_lock)
138 __acquires(&lip->li_ailp->ail_lock)
140 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
141 struct xfs_buf *bp = lip->li_buf;
142 uint rval = XFS_ITEM_SUCCESS;
145 if (atomic_read(&dqp->q_pincount) > 0)
146 return XFS_ITEM_PINNED;
148 if (!xfs_dqlock_nowait(dqp))
149 return XFS_ITEM_LOCKED;
152 * Re-check the pincount now that we stabilized the value by
153 * taking the quota lock.
155 if (atomic_read(&dqp->q_pincount) > 0) {
156 rval = XFS_ITEM_PINNED;
161 * Someone else is already flushing the dquot. Nothing we can do
162 * here but wait for the flush to finish and remove the item from
165 if (!xfs_dqflock_nowait(dqp)) {
166 rval = XFS_ITEM_FLUSHING;
170 spin_unlock(&lip->li_ailp->ail_lock);
172 error = xfs_qm_dqflush(dqp, &bp);
174 if (!xfs_buf_delwri_queue(bp, buffer_list))
175 rval = XFS_ITEM_FLUSHING;
177 } else if (error == -EAGAIN)
178 rval = XFS_ITEM_LOCKED;
180 spin_lock(&lip->li_ailp->ail_lock);
187 xfs_qm_dquot_logitem_release(
188 struct xfs_log_item *lip)
190 struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot;
192 ASSERT(XFS_DQ_IS_LOCKED(dqp));
195 * dquots are never 'held' from getting unlocked at the end of
196 * a transaction. Their locking and unlocking is hidden inside the
197 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
204 xfs_qm_dquot_logitem_committing(
205 struct xfs_log_item *lip,
206 xfs_lsn_t commit_lsn)
208 return xfs_qm_dquot_logitem_release(lip);
211 static const struct xfs_item_ops xfs_dquot_item_ops = {
212 .iop_size = xfs_qm_dquot_logitem_size,
213 .iop_format = xfs_qm_dquot_logitem_format,
214 .iop_pin = xfs_qm_dquot_logitem_pin,
215 .iop_unpin = xfs_qm_dquot_logitem_unpin,
216 .iop_release = xfs_qm_dquot_logitem_release,
217 .iop_committing = xfs_qm_dquot_logitem_committing,
218 .iop_push = xfs_qm_dquot_logitem_push,
219 .iop_error = xfs_dquot_item_error
223 * Initialize the dquot log item for a newly allocated dquot.
224 * The dquot isn't locked at this point, but it isn't on any of the lists
225 * either, so we don't care.
228 xfs_qm_dquot_logitem_init(
229 struct xfs_dquot *dqp)
231 struct xfs_dq_logitem *lp = &dqp->q_logitem;
233 xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
234 &xfs_dquot_item_ops);
238 /*------------------ QUOTAOFF LOG ITEMS -------------------*/
240 static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip)
242 return container_of(lip, struct xfs_qoff_logitem, qql_item);
247 * This returns the number of iovecs needed to log the given quotaoff item.
248 * We only need 1 iovec for an quotaoff item. It just logs the
249 * quotaoff_log_format structure.
252 xfs_qm_qoff_logitem_size(
253 struct xfs_log_item *lip,
258 *nbytes += sizeof(struct xfs_qoff_logitem);
262 xfs_qm_qoff_logitem_format(
263 struct xfs_log_item *lip,
264 struct xfs_log_vec *lv)
266 struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip);
267 struct xfs_log_iovec *vecp = NULL;
268 struct xfs_qoff_logformat *qlf;
270 qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF);
271 qlf->qf_type = XFS_LI_QUOTAOFF;
273 qlf->qf_flags = qflip->qql_flags;
274 xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem));
278 * There isn't much you can do to push a quotaoff item. It is simply
279 * stuck waiting for the log to be flushed to disk.
282 xfs_qm_qoff_logitem_push(
283 struct xfs_log_item *lip,
284 struct list_head *buffer_list)
286 return XFS_ITEM_LOCKED;
290 xfs_qm_qoffend_logitem_committed(
291 struct xfs_log_item *lip,
294 struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip);
295 struct xfs_qoff_logitem *qfs = qfe->qql_start_lip;
297 xfs_qm_qoff_logitem_relse(qfs);
299 kmem_free(lip->li_lv_shadow);
301 return (xfs_lsn_t)-1;
305 xfs_qm_qoff_logitem_release(
306 struct xfs_log_item *lip)
308 struct xfs_qoff_logitem *qoff = QOFF_ITEM(lip);
310 if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
311 if (qoff->qql_start_lip)
312 xfs_qm_qoff_logitem_relse(qoff->qql_start_lip);
313 xfs_qm_qoff_logitem_relse(qoff);
317 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
318 .iop_size = xfs_qm_qoff_logitem_size,
319 .iop_format = xfs_qm_qoff_logitem_format,
320 .iop_committed = xfs_qm_qoffend_logitem_committed,
321 .iop_push = xfs_qm_qoff_logitem_push,
322 .iop_release = xfs_qm_qoff_logitem_release,
325 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
326 .iop_size = xfs_qm_qoff_logitem_size,
327 .iop_format = xfs_qm_qoff_logitem_format,
328 .iop_push = xfs_qm_qoff_logitem_push,
329 .iop_release = xfs_qm_qoff_logitem_release,
333 * Delete the quotaoff intent from the AIL and free it. On success,
334 * this should only be called for the start item. It can be used for
335 * either on shutdown or abort.
338 xfs_qm_qoff_logitem_relse(
339 struct xfs_qoff_logitem *qoff)
341 struct xfs_log_item *lip = &qoff->qql_item;
343 ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags) ||
344 test_bit(XFS_LI_ABORTED, &lip->li_flags) ||
345 XFS_FORCED_SHUTDOWN(lip->li_mountp));
346 xfs_trans_ail_delete(lip, 0);
347 kmem_free(lip->li_lv_shadow);
352 * Allocate and initialize an quotaoff item of the correct quota type(s).
354 struct xfs_qoff_logitem *
355 xfs_qm_qoff_logitem_init(
356 struct xfs_mount *mp,
357 struct xfs_qoff_logitem *start,
360 struct xfs_qoff_logitem *qf;
362 qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), 0);
364 xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
365 &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
366 qf->qql_item.li_mountp = mp;
367 qf->qql_start_lip = start;
368 qf->qql_flags = flags;