Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * Copyright (c) 2000-2003 Silicon Graphics, Inc.
4 : * All Rights Reserved.
5 : */
6 : #include "xfs.h"
7 : #include "xfs_fs.h"
8 : #include "xfs_format.h"
9 : #include "xfs_log_format.h"
10 : #include "xfs_shared.h"
11 : #include "xfs_trans_resv.h"
12 : #include "xfs_bit.h"
13 : #include "xfs_mount.h"
14 : #include "xfs_defer.h"
15 : #include "xfs_inode.h"
16 : #include "xfs_bmap.h"
17 : #include "xfs_quota.h"
18 : #include "xfs_trans.h"
19 : #include "xfs_buf_item.h"
20 : #include "xfs_trans_space.h"
21 : #include "xfs_trans_priv.h"
22 : #include "xfs_qm.h"
23 : #include "xfs_trace.h"
24 : #include "xfs_log.h"
25 : #include "xfs_bmap_btree.h"
26 : #include "xfs_error.h"
27 :
28 : /*
29 : * Lock order:
30 : *
31 : * ip->i_lock
32 : * qi->qi_tree_lock
33 : * dquot->q_qlock (xfs_dqlock() and friends)
34 : * dquot->q_flush (xfs_dqflock() and friends)
35 : * qi->qi_lru_lock
36 : *
37 : * If two dquots need to be locked the order is user before group/project,
38 : * otherwise by the lowest id first, see xfs_dqlock2.
39 : */
40 :
41 : struct kmem_cache *xfs_dqtrx_cache;
42 : static struct kmem_cache *xfs_dquot_cache;
43 :
44 : static struct lock_class_key xfs_dquot_group_class;
45 : static struct lock_class_key xfs_dquot_project_class;
46 :
47 : /*
48 : * This is called to free all the memory associated with a dquot
49 : */
50 : void
51 14575647 : xfs_qm_dqdestroy(
52 : struct xfs_dquot *dqp)
53 : {
54 14575647 : ASSERT(list_empty(&dqp->q_lru));
55 :
56 14575647 : kmem_free(dqp->q_logitem.qli_item.li_lv_shadow);
57 14575610 : mutex_destroy(&dqp->q_qlock);
58 :
59 14575627 : XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot);
60 14575660 : kmem_cache_free(xfs_dquot_cache, dqp);
61 14575685 : }
62 :
63 : /*
64 : * If default limits are in force, push them into the dquot now.
65 : * We overwrite the dquot limits only if they are zero and this
66 : * is not the root dquot.
67 : */
68 : void
69 200021656 : xfs_qm_adjust_dqlimits(
70 : struct xfs_dquot *dq)
71 : {
72 200021656 : struct xfs_mount *mp = dq->q_mount;
73 200021656 : struct xfs_quotainfo *q = mp->m_quotainfo;
74 200021656 : struct xfs_def_quota *defq;
75 200021656 : int prealloc = 0;
76 :
77 200021656 : ASSERT(dq->q_id);
78 200021656 : defq = xfs_get_defquota(q, xfs_dquot_type(dq));
79 :
80 200019819 : if (!dq->q_blk.softlimit) {
81 199737895 : dq->q_blk.softlimit = defq->blk.soft;
82 199737895 : prealloc = 1;
83 : }
84 200019819 : if (!dq->q_blk.hardlimit) {
85 199724914 : dq->q_blk.hardlimit = defq->blk.hard;
86 199724914 : prealloc = 1;
87 : }
88 200019819 : if (!dq->q_ino.softlimit)
89 199753764 : dq->q_ino.softlimit = defq->ino.soft;
90 200019819 : if (!dq->q_ino.hardlimit)
91 199753718 : dq->q_ino.hardlimit = defq->ino.hard;
92 200019819 : if (!dq->q_rtb.softlimit)
93 200020588 : dq->q_rtb.softlimit = defq->rtb.soft;
94 200019819 : if (!dq->q_rtb.hardlimit)
95 200020268 : dq->q_rtb.hardlimit = defq->rtb.hard;
96 :
97 200019819 : if (prealloc)
98 199737697 : xfs_dquot_set_prealloc_limits(dq);
99 200017261 : }
100 :
101 : /* Set the expiration time of a quota's grace period. */
102 : time64_t
103 222 : xfs_dquot_set_timeout(
104 : struct xfs_mount *mp,
105 : time64_t timeout)
106 : {
107 886 : struct xfs_quotainfo *qi = mp->m_quotainfo;
108 :
109 886 : return clamp_t(time64_t, timeout, qi->qi_expiry_min,
110 : qi->qi_expiry_max);
111 : }
112 :
113 : /* Set the length of the default grace period. */
114 : time64_t
115 16985 : xfs_dquot_set_grace_period(
116 : time64_t grace)
117 : {
118 16985 : return clamp_t(time64_t, grace, XFS_DQ_GRACE_MIN, XFS_DQ_GRACE_MAX);
119 : }
120 :
121 : /*
122 : * Determine if this quota counter is over either limit and set the quota
123 : * timers as appropriate.
124 : */
125 : static inline void
126 600194866 : xfs_qm_adjust_res_timer(
127 : struct xfs_mount *mp,
128 : struct xfs_dquot_res *res,
129 : struct xfs_quota_limits *qlim)
130 : {
131 600194866 : ASSERT(res->hardlimit == 0 || res->softlimit <= res->hardlimit);
132 :
133 600194866 : if ((res->softlimit && res->count > res->softlimit) ||
134 600171409 : (res->hardlimit && res->count > res->hardlimit)) {
135 23519 : if (res->timer == 0)
136 664 : res->timer = xfs_dquot_set_timeout(mp,
137 664 : ktime_get_real_seconds() + qlim->time);
138 : } else {
139 600171347 : res->timer = 0;
140 : }
141 600194866 : }
142 :
143 : /*
144 : * Check the limits and timers of a dquot and start or reset timers
145 : * if necessary.
146 : * This gets called even when quota enforcement is OFF, which makes our
147 : * life a little less complicated. (We just don't reject any quota
148 : * reservations in that case, when enforcement is off).
149 : * We also return 0 as the values of the timers in Q_GETQUOTA calls, when
150 : * enforcement's off.
151 : * In contrast, warnings are a little different in that they don't
152 : * 'automatically' get started when limits get exceeded. They do
153 : * get reset to zero, however, when we find the count to be under
154 : * the soft limit (they are only ever set non-zero via userspace).
155 : */
156 : void
157 200075324 : xfs_qm_adjust_dqtimers(
158 : struct xfs_dquot *dq)
159 : {
160 200075324 : struct xfs_mount *mp = dq->q_mount;
161 200075324 : struct xfs_quotainfo *qi = mp->m_quotainfo;
162 200075324 : struct xfs_def_quota *defq;
163 :
164 200075324 : ASSERT(dq->q_id);
165 200075324 : defq = xfs_get_defquota(qi, xfs_dquot_type(dq));
166 :
167 200069956 : xfs_qm_adjust_res_timer(dq->q_mount, &dq->q_blk, &defq->blk);
168 200068040 : xfs_qm_adjust_res_timer(dq->q_mount, &dq->q_ino, &defq->ino);
169 200068136 : xfs_qm_adjust_res_timer(dq->q_mount, &dq->q_rtb, &defq->rtb);
170 200068626 : }
171 :
172 : /*
173 : * initialize a buffer full of dquots and log the whole thing
174 : */
175 : STATIC void
176 2296711 : xfs_qm_init_dquot_blk(
177 : struct xfs_trans *tp,
178 : struct xfs_mount *mp,
179 : xfs_dqid_t id,
180 : xfs_dqtype_t type,
181 : struct xfs_buf *bp)
182 : {
183 2296711 : struct xfs_quotainfo *q = mp->m_quotainfo;
184 2296711 : struct xfs_dqblk *d;
185 2296711 : xfs_dqid_t curid;
186 2296711 : unsigned int qflag;
187 2296711 : unsigned int blftype;
188 2296711 : int i;
189 :
190 2296711 : ASSERT(tp);
191 2296711 : ASSERT(xfs_buf_islocked(bp));
192 :
193 2296711 : switch (type) {
194 : case XFS_DQTYPE_USER:
195 : qflag = XFS_UQUOTA_CHKD;
196 : blftype = XFS_BLF_UDQUOT_BUF;
197 : break;
198 48474 : case XFS_DQTYPE_PROJ:
199 48474 : qflag = XFS_PQUOTA_CHKD;
200 48474 : blftype = XFS_BLF_PDQUOT_BUF;
201 48474 : break;
202 1121701 : case XFS_DQTYPE_GROUP:
203 1121701 : qflag = XFS_GQUOTA_CHKD;
204 1121701 : blftype = XFS_BLF_GDQUOT_BUF;
205 1121701 : break;
206 0 : default:
207 0 : ASSERT(0);
208 0 : return;
209 : }
210 :
211 2296711 : d = bp->b_addr;
212 :
213 : /*
214 : * ID of the first dquot in the block - id's are zero based.
215 : */
216 2296711 : curid = id - (id % q->qi_dqperchunk);
217 2296711 : memset(d, 0, BBTOB(q->qi_dqchunklen));
218 71179758 : for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) {
219 68883118 : d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
220 68883118 : d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
221 68883118 : d->dd_diskdq.d_id = cpu_to_be32(curid);
222 68883118 : d->dd_diskdq.d_type = type;
223 68883118 : if (curid > 0 && xfs_has_bigtime(mp))
224 68769605 : d->dd_diskdq.d_type |= XFS_DQTYPE_BIGTIME;
225 68883118 : if (xfs_has_crc(mp)) {
226 68880410 : uuid_copy(&d->dd_uuid, &mp->m_sb.sb_meta_uuid);
227 68878539 : xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
228 : XFS_DQUOT_CRC_OFF);
229 : }
230 : }
231 :
232 2296640 : xfs_trans_dquot_buf(tp, bp, blftype);
233 :
234 : /*
235 : * quotacheck uses delayed writes to update all the dquots on disk in an
236 : * efficient manner instead of logging the individual dquot changes as
237 : * they are made. However if we log the buffer allocated here and crash
238 : * after quotacheck while the logged initialisation is still in the
239 : * active region of the log, log recovery can replay the dquot buffer
240 : * initialisation over the top of the checked dquots and corrupt quota
241 : * accounting.
242 : *
243 : * To avoid this problem, quotacheck cannot log the initialised buffer.
244 : * We must still dirty the buffer and write it back before the
245 : * allocation transaction clears the log. Therefore, mark the buffer as
246 : * ordered instead of logging it directly. This is safe for quotacheck
247 : * because it detects and repairs allocated but initialized dquot blocks
248 : * in the quota inodes.
249 : */
250 2296079 : if (!(mp->m_qflags & qflag))
251 24551 : xfs_trans_ordered_buf(tp, bp);
252 : else
253 2271528 : xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1);
254 : }
255 :
256 : /*
257 : * Initialize the dynamic speculative preallocation thresholds. The lo/hi
258 : * watermarks correspond to the soft and hard limits by default. If a soft limit
259 : * is not specified, we use 95% of the hard limit.
260 : */
261 : void
262 214091230 : xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp)
263 : {
264 214091230 : uint64_t space;
265 :
266 214091230 : dqp->q_prealloc_hi_wmark = dqp->q_blk.hardlimit;
267 214091230 : dqp->q_prealloc_lo_wmark = dqp->q_blk.softlimit;
268 214091230 : if (!dqp->q_prealloc_lo_wmark) {
269 214057997 : dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark;
270 214057997 : do_div(dqp->q_prealloc_lo_wmark, 100);
271 214057997 : dqp->q_prealloc_lo_wmark *= 95;
272 : }
273 :
274 214091230 : space = dqp->q_prealloc_hi_wmark;
275 :
276 214091230 : do_div(space, 100);
277 214091230 : dqp->q_low_space[XFS_QLOWSP_1_PCNT] = space;
278 214091230 : dqp->q_low_space[XFS_QLOWSP_3_PCNT] = space * 3;
279 214091230 : dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5;
280 214091230 : }
281 :
282 : /*
283 : * Ensure that the given in-core dquot has a buffer on disk backing it, and
284 : * return the buffer locked and held. This is called when the bmapi finds a
285 : * hole.
286 : */
287 : STATIC int
288 2329693 : xfs_dquot_disk_alloc(
289 : struct xfs_dquot *dqp,
290 : struct xfs_buf **bpp)
291 : {
292 2329693 : struct xfs_bmbt_irec map;
293 2329693 : struct xfs_trans *tp;
294 2329693 : struct xfs_mount *mp = dqp->q_mount;
295 2329693 : struct xfs_buf *bp;
296 2329693 : xfs_dqtype_t qtype = xfs_dquot_type(dqp);
297 2329693 : struct xfs_inode *quotip = xfs_quota_inode(mp, qtype);
298 2329638 : int nmaps = 1;
299 2329638 : int error;
300 :
301 2329638 : trace_xfs_dqalloc(dqp);
302 :
303 2329546 : error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_dqalloc,
304 2329546 : XFS_QM_DQALLOC_SPACE_RES(mp), 0, 0, &tp);
305 2329360 : if (error)
306 : return error;
307 :
308 2297361 : xfs_ilock(quotip, XFS_ILOCK_EXCL);
309 2297996 : xfs_trans_ijoin(tp, quotip, 0);
310 :
311 2298092 : if (!xfs_this_quota_on(dqp->q_mount, qtype)) {
312 : /*
313 : * Return if this type of quotas is turned off while we didn't
314 : * have an inode lock
315 : */
316 0 : error = -ESRCH;
317 0 : goto err_cancel;
318 : }
319 :
320 2298092 : error = xfs_iext_count_may_overflow(quotip, XFS_DATA_FORK,
321 : XFS_IEXT_ADD_NOSPLIT_CNT);
322 2297968 : if (error == -EFBIG)
323 5 : error = xfs_iext_count_upgrade(tp, quotip,
324 : XFS_IEXT_ADD_NOSPLIT_CNT);
325 2297968 : if (error)
326 5 : goto err_cancel;
327 :
328 : /* Create the block mapping. */
329 2297963 : error = xfs_bmapi_write(tp, quotip, dqp->q_fileoffset,
330 : XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA, 0, &map,
331 : &nmaps);
332 2297880 : if (error)
333 1463 : goto err_cancel;
334 :
335 2296417 : ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
336 2296417 : ASSERT(nmaps == 1);
337 2296417 : ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
338 : (map.br_startblock != HOLESTARTBLOCK));
339 :
340 : /*
341 : * Keep track of the blkno to save a lookup later
342 : */
343 2296417 : dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
344 :
345 : /* now we can just get the buffer (there's nothing to read yet) */
346 2296153 : error = xfs_trans_get_buf(tp, mp->m_ddev_targp, dqp->q_blkno,
347 2296153 : mp->m_quotainfo->qi_dqchunklen, 0, &bp);
348 2296489 : if (error)
349 0 : goto err_cancel;
350 2296489 : bp->b_ops = &xfs_dquot_buf_ops;
351 :
352 : /*
353 : * Make a chunk of dquots out of this buffer and log
354 : * the entire thing.
355 : */
356 2296489 : xfs_qm_init_dquot_blk(tp, mp, dqp->q_id, qtype, bp);
357 2296083 : xfs_buf_set_ref(bp, XFS_DQUOT_REF);
358 :
359 : /*
360 : * Hold the buffer and join it to the dfops so that we'll still own
361 : * the buffer when we return to the caller. The buffer disposal on
362 : * error must be paid attention to very carefully, as it has been
363 : * broken since commit efa092f3d4c6 "[XFS] Fixes a bug in the quota
364 : * code when allocating a new dquot record" in 2005, and the later
365 : * conversion to xfs_defer_ops in commit 310a75a3c6c747 failed to keep
366 : * the buffer locked across the _defer_finish call. We can now do
367 : * this correctly with xfs_defer_bjoin.
368 : *
369 : * Above, we allocated a disk block for the dquot information and used
370 : * get_buf to initialize the dquot. If the _defer_finish fails, the old
371 : * transaction is gone but the new buffer is not joined or held to any
372 : * transaction, so we must _buf_relse it.
373 : *
374 : * If everything succeeds, the caller of this function is returned a
375 : * buffer that is locked and held to the transaction. The caller
376 : * is responsible for unlocking any buffer passed back, either
377 : * manually or by committing the transaction. On error, the buffer is
378 : * released and not passed back.
379 : *
380 : * Keep the quota inode ILOCKed until after the transaction commit to
381 : * maintain the atomicity of bmap/rmap updates.
382 : */
383 2296132 : xfs_trans_bhold(tp, bp);
384 2295771 : error = xfs_trans_commit(tp);
385 2296552 : xfs_iunlock(quotip, XFS_ILOCK_EXCL);
386 2296548 : if (error) {
387 174 : xfs_buf_relse(bp);
388 174 : return error;
389 : }
390 :
391 2296374 : *bpp = bp;
392 2296374 : return 0;
393 :
394 1468 : err_cancel:
395 1468 : xfs_trans_cancel(tp);
396 1468 : xfs_iunlock(quotip, XFS_ILOCK_EXCL);
397 1468 : return error;
398 : }
399 :
400 : /*
401 : * Read in the in-core dquot's on-disk metadata and return the buffer.
402 : * Returns ENOENT to signal a hole.
403 : */
404 : STATIC int
405 14575361 : xfs_dquot_disk_read(
406 : struct xfs_mount *mp,
407 : struct xfs_dquot *dqp,
408 : struct xfs_buf **bpp)
409 : {
410 14575361 : struct xfs_bmbt_irec map;
411 14575361 : struct xfs_buf *bp;
412 14575361 : xfs_dqtype_t qtype = xfs_dquot_type(dqp);
413 14575361 : struct xfs_inode *quotip = xfs_quota_inode(mp, qtype);
414 14575191 : uint lock_mode;
415 14575191 : int nmaps = 1;
416 14575191 : int error;
417 :
418 14575191 : lock_mode = xfs_ilock_data_map_shared(quotip);
419 14575170 : if (!xfs_this_quota_on(mp, qtype)) {
420 : /*
421 : * Return if this type of quotas is turned off while we
422 : * didn't have the quota inode lock.
423 : */
424 0 : xfs_iunlock(quotip, lock_mode);
425 0 : return -ESRCH;
426 : }
427 :
428 : /*
429 : * Find the block map; no allocations yet
430 : */
431 14575170 : error = xfs_bmapi_read(quotip, dqp->q_fileoffset,
432 : XFS_DQUOT_CLUSTER_SIZE_FSB, &map, &nmaps, 0);
433 14575070 : xfs_iunlock(quotip, lock_mode);
434 14575196 : if (error)
435 : return error;
436 :
437 14574668 : ASSERT(nmaps == 1);
438 14574668 : ASSERT(map.br_blockcount >= 1);
439 14574668 : ASSERT(map.br_startblock != DELAYSTARTBLOCK);
440 14574668 : if (map.br_startblock == HOLESTARTBLOCK)
441 : return -ENOENT;
442 :
443 11999622 : trace_xfs_dqtobp_read(dqp);
444 :
445 : /*
446 : * store the blkno etc so that we don't have to do the
447 : * mapping all the time
448 : */
449 11999547 : dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
450 :
451 11999535 : error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno,
452 11999535 : mp->m_quotainfo->qi_dqchunklen, 0, &bp,
453 : &xfs_dquot_buf_ops);
454 11999717 : if (error) {
455 5098 : ASSERT(bp == NULL);
456 5098 : return error;
457 : }
458 :
459 11994619 : ASSERT(xfs_buf_islocked(bp));
460 11994619 : xfs_buf_set_ref(bp, XFS_DQUOT_REF);
461 11994532 : *bpp = bp;
462 :
463 11994532 : return 0;
464 : }
465 :
466 : /* Allocate and initialize everything we need for an incore dquot. */
467 : STATIC struct xfs_dquot *
468 14575680 : xfs_dquot_alloc(
469 : struct xfs_mount *mp,
470 : xfs_dqid_t id,
471 : xfs_dqtype_t type)
472 : {
473 14575680 : struct xfs_dquot *dqp;
474 :
475 14575680 : dqp = kmem_cache_zalloc(xfs_dquot_cache, GFP_KERNEL | __GFP_NOFAIL);
476 :
477 14575673 : dqp->q_type = type;
478 14575673 : dqp->q_id = id;
479 14575673 : dqp->q_mount = mp;
480 14575673 : INIT_LIST_HEAD(&dqp->q_lru);
481 14575673 : mutex_init(&dqp->q_qlock);
482 14575605 : init_waitqueue_head(&dqp->q_pinwait);
483 14575585 : dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;
484 : /*
485 : * Offset of dquot in the (fixed sized) dquot chunk.
486 : */
487 14575585 : dqp->q_bufoffset = (id % mp->m_quotainfo->qi_dqperchunk) *
488 : sizeof(struct xfs_dqblk);
489 :
490 : /*
491 : * Because we want to use a counting completion, complete
492 : * the flush completion once to allow a single access to
493 : * the flush completion without blocking.
494 : */
495 14575585 : init_completion(&dqp->q_flush);
496 14575528 : complete(&dqp->q_flush);
497 :
498 : /*
499 : * Make sure group quotas have a different lock class than user
500 : * quotas.
501 : */
502 14575456 : switch (type) {
503 : case XFS_DQTYPE_USER:
504 : /* uses the default lock class */
505 : break;
506 : case XFS_DQTYPE_GROUP:
507 : lockdep_set_class(&dqp->q_qlock, &xfs_dquot_group_class);
508 : break;
509 : case XFS_DQTYPE_PROJ:
510 : lockdep_set_class(&dqp->q_qlock, &xfs_dquot_project_class);
511 : break;
512 0 : default:
513 0 : ASSERT(0);
514 0 : break;
515 : }
516 :
517 14575456 : xfs_qm_dquot_logitem_init(dqp);
518 :
519 14575329 : XFS_STATS_INC(mp, xs_qm_dquot);
520 14575398 : return dqp;
521 : }
522 :
523 : /* Check the ondisk dquot's id and type match what the incore dquot expects. */
524 : static bool
525 14290693 : xfs_dquot_check_type(
526 : struct xfs_dquot *dqp,
527 : struct xfs_disk_dquot *ddqp)
528 : {
529 14290693 : uint8_t ddqp_type;
530 14290693 : uint8_t dqp_type;
531 :
532 14290693 : ddqp_type = ddqp->d_type & XFS_DQTYPE_REC_MASK;
533 14290693 : dqp_type = xfs_dquot_type(dqp);
534 :
535 14290693 : if (be32_to_cpu(ddqp->d_id) != dqp->q_id)
536 : return false;
537 :
538 : /*
539 : * V5 filesystems always expect an exact type match. V4 filesystems
540 : * expect an exact match for user dquots and for non-root group and
541 : * project dquots.
542 : */
543 14290915 : if (xfs_has_crc(dqp->q_mount) ||
544 85 : dqp_type == XFS_DQTYPE_USER || dqp->q_id != 0)
545 14290830 : return ddqp_type == dqp_type;
546 :
547 : /*
548 : * V4 filesystems support either group or project quotas, but not both
549 : * at the same time. The non-user quota file can be switched between
550 : * group and project quota uses depending on the mount options, which
551 : * means that we can encounter the other type when we try to load quota
552 : * defaults. Quotacheck will soon reset the entire quota file
553 : * (including the root dquot) anyway, but don't log scary corruption
554 : * reports to dmesg.
555 : */
556 85 : return ddqp_type == XFS_DQTYPE_GROUP || ddqp_type == XFS_DQTYPE_PROJ;
557 : }
558 :
559 : /* Copy the in-core quota fields in from the on-disk buffer. */
560 : STATIC int
561 14290873 : xfs_dquot_from_disk(
562 : struct xfs_dquot *dqp,
563 : struct xfs_buf *bp)
564 : {
565 14290873 : struct xfs_disk_dquot *ddqp = bp->b_addr + dqp->q_bufoffset;
566 :
567 : /*
568 : * Ensure that we got the type and ID we were looking for.
569 : * Everything else was checked by the dquot buffer verifier.
570 : */
571 14290873 : if (!xfs_dquot_check_type(dqp, ddqp)) {
572 0 : xfs_alert_tag(bp->b_mount, XFS_PTAG_VERIFIER_ERROR,
573 : "Metadata corruption detected at %pS, quota %u",
574 : __this_address, dqp->q_id);
575 0 : xfs_alert(bp->b_mount, "Unmount and run xfs_repair");
576 0 : return -EFSCORRUPTED;
577 : }
578 :
579 : /* copy everything from disk dquot to the incore dquot */
580 14290873 : dqp->q_type = ddqp->d_type;
581 14290873 : dqp->q_blk.hardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
582 14290873 : dqp->q_blk.softlimit = be64_to_cpu(ddqp->d_blk_softlimit);
583 14290873 : dqp->q_ino.hardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
584 14290873 : dqp->q_ino.softlimit = be64_to_cpu(ddqp->d_ino_softlimit);
585 14290873 : dqp->q_rtb.hardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
586 14290873 : dqp->q_rtb.softlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
587 :
588 14290873 : dqp->q_blk.count = be64_to_cpu(ddqp->d_bcount);
589 14290873 : dqp->q_ino.count = be64_to_cpu(ddqp->d_icount);
590 14290873 : dqp->q_rtb.count = be64_to_cpu(ddqp->d_rtbcount);
591 :
592 14290873 : dqp->q_blk.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_btimer);
593 14290743 : dqp->q_ino.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_itimer);
594 14290872 : dqp->q_rtb.timer = xfs_dquot_from_disk_ts(ddqp, ddqp->d_rtbtimer);
595 :
596 : /*
597 : * Reservation counters are defined as reservation plus current usage
598 : * to avoid having to add every time.
599 : */
600 14290888 : dqp->q_blk.reserved = dqp->q_blk.count;
601 14290888 : dqp->q_ino.reserved = dqp->q_ino.count;
602 14290888 : dqp->q_rtb.reserved = dqp->q_rtb.count;
603 :
604 : /* initialize the dquot speculative prealloc thresholds */
605 14290888 : xfs_dquot_set_prealloc_limits(dqp);
606 14290888 : return 0;
607 : }
608 :
609 : /* Copy the in-core quota fields into the on-disk buffer. */
610 : void
611 2858876580 : xfs_dquot_to_disk(
612 : struct xfs_disk_dquot *ddqp,
613 : struct xfs_dquot *dqp)
614 : {
615 2858876580 : ddqp->d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
616 2858876580 : ddqp->d_version = XFS_DQUOT_VERSION;
617 2858876580 : ddqp->d_type = dqp->q_type;
618 2858876580 : ddqp->d_id = cpu_to_be32(dqp->q_id);
619 2858876580 : ddqp->d_pad0 = 0;
620 2858876580 : ddqp->d_pad = 0;
621 :
622 2858876580 : ddqp->d_blk_hardlimit = cpu_to_be64(dqp->q_blk.hardlimit);
623 2858876580 : ddqp->d_blk_softlimit = cpu_to_be64(dqp->q_blk.softlimit);
624 2858876580 : ddqp->d_ino_hardlimit = cpu_to_be64(dqp->q_ino.hardlimit);
625 2858876580 : ddqp->d_ino_softlimit = cpu_to_be64(dqp->q_ino.softlimit);
626 2858876580 : ddqp->d_rtb_hardlimit = cpu_to_be64(dqp->q_rtb.hardlimit);
627 2858876580 : ddqp->d_rtb_softlimit = cpu_to_be64(dqp->q_rtb.softlimit);
628 :
629 2858876580 : ddqp->d_bcount = cpu_to_be64(dqp->q_blk.count);
630 2858876580 : ddqp->d_icount = cpu_to_be64(dqp->q_ino.count);
631 2858876580 : ddqp->d_rtbcount = cpu_to_be64(dqp->q_rtb.count);
632 :
633 2858876580 : ddqp->d_bwarns = 0;
634 2858876580 : ddqp->d_iwarns = 0;
635 2858876580 : ddqp->d_rtbwarns = 0;
636 :
637 2858876580 : ddqp->d_btimer = xfs_dquot_to_disk_ts(dqp, dqp->q_blk.timer);
638 2858868520 : ddqp->d_itimer = xfs_dquot_to_disk_ts(dqp, dqp->q_ino.timer);
639 2858879032 : ddqp->d_rtbtimer = xfs_dquot_to_disk_ts(dqp, dqp->q_rtb.timer);
640 2858880777 : }
641 :
642 : /*
643 : * Read in the ondisk dquot using dqtobp() then copy it to an incore version,
644 : * and release the buffer immediately. If @can_alloc is true, fill any
645 : * holes in the on-disk metadata.
646 : */
647 : static int
648 14575686 : xfs_qm_dqread(
649 : struct xfs_mount *mp,
650 : xfs_dqid_t id,
651 : xfs_dqtype_t type,
652 : bool can_alloc,
653 : struct xfs_dquot **dqpp)
654 : {
655 14575686 : struct xfs_dquot *dqp;
656 14575686 : struct xfs_buf *bp;
657 14575686 : int error;
658 :
659 14575686 : dqp = xfs_dquot_alloc(mp, id, type);
660 14575437 : trace_xfs_dqread(dqp);
661 :
662 : /* Try to read the buffer, allocating if necessary. */
663 14575411 : error = xfs_dquot_disk_read(mp, dqp, &bp);
664 14574899 : if (error == -ENOENT && can_alloc)
665 2329748 : error = xfs_dquot_disk_alloc(dqp, &bp);
666 14575004 : if (error)
667 284299 : goto err;
668 :
669 : /*
670 : * At this point we should have a clean locked buffer. Copy the data
671 : * to the incore dquot and release the buffer since the incore dquot
672 : * has its own locking protocol so we needn't tie up the buffer any
673 : * further.
674 : */
675 14290705 : ASSERT(xfs_buf_islocked(bp));
676 14290705 : error = xfs_dquot_from_disk(dqp, bp);
677 14290648 : xfs_buf_relse(bp);
678 14291211 : if (error)
679 0 : goto err;
680 :
681 14291211 : *dqpp = dqp;
682 14291211 : return error;
683 :
684 284299 : err:
685 284299 : trace_xfs_dqread_fail(dqp);
686 284288 : xfs_qm_dqdestroy(dqp);
687 284371 : *dqpp = NULL;
688 284371 : return error;
689 : }
690 :
691 : /*
692 : * Advance to the next id in the current chunk, or if at the
693 : * end of the chunk, skip ahead to first id in next allocated chunk
694 : * using the SEEK_DATA interface.
695 : */
696 : static int
697 12565404 : xfs_dq_get_next_id(
698 : struct xfs_mount *mp,
699 : xfs_dqtype_t type,
700 : xfs_dqid_t *id)
701 : {
702 12565404 : struct xfs_inode *quotip = xfs_quota_inode(mp, type);
703 12565404 : xfs_dqid_t next_id = *id + 1; /* simple advance */
704 12565404 : uint lock_flags;
705 12565404 : struct xfs_bmbt_irec got;
706 12565404 : struct xfs_iext_cursor cur;
707 12565404 : xfs_fsblock_t start;
708 12565404 : int error = 0;
709 :
710 : /* If we'd wrap past the max ID, stop */
711 12565404 : if (next_id < *id)
712 : return -ENOENT;
713 :
714 : /* If new ID is within the current chunk, advancing it sufficed */
715 12565363 : if (next_id % mp->m_quotainfo->qi_dqperchunk) {
716 12146302 : *id = next_id;
717 12146302 : return 0;
718 : }
719 :
720 : /* Nope, next_id is now past the current chunk, so find the next one */
721 419061 : start = (xfs_fsblock_t)next_id / mp->m_quotainfo->qi_dqperchunk;
722 :
723 419061 : lock_flags = xfs_ilock_data_map_shared(quotip);
724 419061 : error = xfs_iread_extents(NULL, quotip, XFS_DATA_FORK);
725 419061 : if (error)
726 : return error;
727 :
728 419061 : if (xfs_iext_lookup_extent(quotip, "ip->i_df, start, &cur, &got)) {
729 : /* contiguous chunk, bump startoff for the id calculation */
730 416238 : if (got.br_startoff < start)
731 285 : got.br_startoff = start;
732 416238 : *id = got.br_startoff * mp->m_quotainfo->qi_dqperchunk;
733 : } else {
734 : error = -ENOENT;
735 : }
736 :
737 419061 : xfs_iunlock(quotip, lock_flags);
738 :
739 419061 : return error;
740 : }
741 :
742 : /*
743 : * Look up the dquot in the in-core cache. If found, the dquot is returned
744 : * locked and ready to go.
745 : */
746 : static struct xfs_dquot *
747 47722068 : xfs_qm_dqget_cache_lookup(
748 : struct xfs_mount *mp,
749 : struct xfs_quotainfo *qi,
750 : struct radix_tree_root *tree,
751 : xfs_dqid_t id)
752 : {
753 47722069 : struct xfs_dquot *dqp;
754 :
755 47722069 : restart:
756 47722069 : mutex_lock(&qi->qi_tree_lock);
757 47804434 : dqp = radix_tree_lookup(tree, id);
758 47804434 : if (!dqp) {
759 14371840 : mutex_unlock(&qi->qi_tree_lock);
760 14371840 : XFS_STATS_INC(mp, xs_qm_dqcachemisses);
761 14371837 : return NULL;
762 : }
763 :
764 33432594 : xfs_dqlock(dqp);
765 33432594 : if (dqp->q_flags & XFS_DQFLAG_FREEING) {
766 1 : xfs_dqunlock(dqp);
767 1 : mutex_unlock(&qi->qi_tree_lock);
768 1 : trace_xfs_dqget_freeing(dqp);
769 1 : delay(1);
770 1 : goto restart;
771 : }
772 :
773 33432593 : dqp->q_nrefs++;
774 33432593 : mutex_unlock(&qi->qi_tree_lock);
775 :
776 33432589 : trace_xfs_dqget_hit(dqp);
777 33432582 : XFS_STATS_INC(mp, xs_qm_dqcachehits);
778 33432575 : return dqp;
779 : }
780 :
781 : /*
782 : * Try to insert a new dquot into the in-core cache. If an error occurs the
783 : * caller should throw away the dquot and start over. Otherwise, the dquot
784 : * is returned locked (and held by the cache) as if there had been a cache
785 : * hit.
786 : */
787 : static int
788 14125995 : xfs_qm_dqget_cache_insert(
789 : struct xfs_mount *mp,
790 : struct xfs_quotainfo *qi,
791 : struct radix_tree_root *tree,
792 : xfs_dqid_t id,
793 : struct xfs_dquot *dqp)
794 : {
795 14125995 : int error;
796 :
797 14125995 : mutex_lock(&qi->qi_tree_lock);
798 14126380 : error = radix_tree_insert(tree, id, dqp);
799 14126380 : if (unlikely(error)) {
800 : /* Duplicate found! Caller must try again. */
801 263 : mutex_unlock(&qi->qi_tree_lock);
802 263 : trace_xfs_dqget_dup(dqp);
803 263 : return error;
804 : }
805 :
806 : /* Return a locked dquot to the caller, with a reference taken. */
807 14126117 : xfs_dqlock(dqp);
808 14126117 : dqp->q_nrefs = 1;
809 :
810 14126117 : qi->qi_dquots++;
811 14126117 : mutex_unlock(&qi->qi_tree_lock);
812 :
813 14126117 : return 0;
814 : }
815 :
816 : /* Check our input parameters. */
817 : static int
818 47906034 : xfs_qm_dqget_checks(
819 : struct xfs_mount *mp,
820 : xfs_dqtype_t type)
821 : {
822 47906034 : switch (type) {
823 21081143 : case XFS_DQTYPE_USER:
824 21081143 : if (!XFS_IS_UQUOTA_ON(mp))
825 1008 : return -ESRCH;
826 : return 0;
827 20764435 : case XFS_DQTYPE_GROUP:
828 20764435 : if (!XFS_IS_GQUOTA_ON(mp))
829 2822 : return -ESRCH;
830 : return 0;
831 6060456 : case XFS_DQTYPE_PROJ:
832 6060456 : if (!XFS_IS_PQUOTA_ON(mp))
833 1011 : return -ESRCH;
834 : return 0;
835 : default:
836 : WARN_ON_ONCE(0);
837 : return -EINVAL;
838 : }
839 : }
840 :
841 : /*
842 : * Given the file system, id, and type (UDQUOT/GDQUOT/PDQUOT), return a
843 : * locked dquot, doing an allocation (if requested) as needed.
844 : */
845 : int
846 31973194 : xfs_qm_dqget(
847 : struct xfs_mount *mp,
848 : xfs_dqid_t id,
849 : xfs_dqtype_t type,
850 : bool can_alloc,
851 : struct xfs_dquot **O_dqpp)
852 : {
853 31973194 : struct xfs_quotainfo *qi = mp->m_quotainfo;
854 31973194 : struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
855 31919644 : struct xfs_dquot *dqp;
856 31919644 : int error;
857 :
858 31919644 : error = xfs_qm_dqget_checks(mp, type);
859 31919644 : if (error)
860 : return error;
861 :
862 31917166 : restart:
863 31917344 : dqp = xfs_qm_dqget_cache_lookup(mp, qi, tree, id);
864 32042498 : if (dqp) {
865 18599127 : *O_dqpp = dqp;
866 18599127 : return 0;
867 : }
868 :
869 13443371 : error = xfs_qm_dqread(mp, id, type, can_alloc, &dqp);
870 13443182 : if (error)
871 241799 : return error;
872 :
873 13201383 : error = xfs_qm_dqget_cache_insert(mp, qi, tree, id, dqp);
874 13201515 : if (error) {
875 : /*
876 : * Duplicate found. Just throw away the new dquot and start
877 : * over.
878 : */
879 178 : xfs_qm_dqdestroy(dqp);
880 178 : XFS_STATS_INC(mp, xs_qm_dquot_dups);
881 178 : goto restart;
882 : }
883 :
884 13201337 : trace_xfs_dqget_miss(dqp);
885 13201336 : *O_dqpp = dqp;
886 13201336 : return 0;
887 : }
888 :
889 : /*
890 : * Given a dquot id and type, read and initialize a dquot from the on-disk
891 : * metadata. This function is only for use during quota initialization so
892 : * it ignores the dquot cache assuming that the dquot shrinker isn't set up.
893 : * The caller is responsible for _qm_dqdestroy'ing the returned dquot.
894 : */
895 : int
896 206227 : xfs_qm_dqget_uncached(
897 : struct xfs_mount *mp,
898 : xfs_dqid_t id,
899 : xfs_dqtype_t type,
900 : struct xfs_dquot **dqpp)
901 : {
902 206227 : int error;
903 :
904 206227 : error = xfs_qm_dqget_checks(mp, type);
905 206227 : if (error)
906 : return error;
907 :
908 203864 : return xfs_qm_dqread(mp, id, type, 0, dqpp);
909 : }
910 :
911 : /* Return the quota id for a given inode and type. */
912 : xfs_dqid_t
913 16110156 : xfs_qm_id_for_quotatype(
914 : struct xfs_inode *ip,
915 : xfs_dqtype_t type)
916 : {
917 16110156 : switch (type) {
918 : case XFS_DQTYPE_USER:
919 5372594 : return i_uid_read(VFS_I(ip));
920 : case XFS_DQTYPE_GROUP:
921 5369441 : return i_gid_read(VFS_I(ip));
922 5368121 : case XFS_DQTYPE_PROJ:
923 5368121 : return ip->i_projid;
924 : }
925 0 : ASSERT(0);
926 0 : return 0;
927 : }
928 :
929 : /*
930 : * Return the dquot for a given inode and type. If @can_alloc is true, then
931 : * allocate blocks if needed. The inode's ILOCK must be held and it must not
932 : * have already had an inode attached.
933 : */
934 : int
935 15761653 : xfs_qm_dqget_inode(
936 : struct xfs_inode *ip,
937 : xfs_dqtype_t type,
938 : bool can_alloc,
939 : struct xfs_dquot **O_dqpp)
940 : {
941 15761653 : struct xfs_mount *mp = ip->i_mount;
942 15761653 : struct xfs_quotainfo *qi = mp->m_quotainfo;
943 15761653 : struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
944 15761560 : struct xfs_dquot *dqp;
945 15761560 : xfs_dqid_t id;
946 15761560 : int error;
947 :
948 15761560 : error = xfs_qm_dqget_checks(mp, type);
949 15761560 : if (error)
950 : return error;
951 :
952 15761538 : ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
953 31523128 : ASSERT(xfs_inode_dquot(ip, type) == NULL);
954 :
955 15761564 : id = xfs_qm_id_for_quotatype(ip, type);
956 :
957 15761582 : restart:
958 15761582 : dqp = xfs_qm_dqget_cache_lookup(mp, qi, tree, id);
959 15761886 : if (dqp) {
960 14833422 : *O_dqpp = dqp;
961 14833422 : return 0;
962 : }
963 :
964 : /*
965 : * Dquot cache miss. We don't want to keep the inode lock across
966 : * a (potential) disk read. Also we don't want to deal with the lock
967 : * ordering between quotainode and this inode. OTOH, dropping the inode
968 : * lock here means dealing with a chown that can happen before
969 : * we re-acquire the lock.
970 : */
971 928464 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
972 928454 : error = xfs_qm_dqread(mp, id, type, can_alloc, &dqp);
973 928453 : xfs_ilock(ip, XFS_ILOCK_EXCL);
974 928410 : if (error)
975 3601 : return error;
976 :
977 : /*
978 : * A dquot could be attached to this inode by now, since we had
979 : * dropped the ilock.
980 : */
981 924809 : if (xfs_this_quota_on(mp, type)) {
982 924809 : struct xfs_dquot *dqp1;
983 :
984 924809 : dqp1 = xfs_inode_dquot(ip, type);
985 924809 : if (dqp1) {
986 0 : xfs_qm_dqdestroy(dqp);
987 0 : dqp = dqp1;
988 0 : xfs_dqlock(dqp);
989 0 : goto dqret;
990 : }
991 : } else {
992 : /* inode stays locked on return */
993 0 : xfs_qm_dqdestroy(dqp);
994 0 : return -ESRCH;
995 : }
996 :
997 924809 : error = xfs_qm_dqget_cache_insert(mp, qi, tree, id, dqp);
998 924864 : if (error) {
999 : /*
1000 : * Duplicate found. Just throw away the new dquot and start
1001 : * over.
1002 : */
1003 85 : xfs_qm_dqdestroy(dqp);
1004 85 : XFS_STATS_INC(mp, xs_qm_dquot_dups);
1005 85 : goto restart;
1006 : }
1007 :
1008 924779 : dqret:
1009 924779 : ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1010 924779 : trace_xfs_dqget_miss(dqp);
1011 924779 : *O_dqpp = dqp;
1012 924779 : return 0;
1013 : }
1014 :
1015 : /*
1016 : * Starting at @id and progressing upwards, look for an initialized incore
1017 : * dquot, lock it, and return it.
1018 : */
1019 : int
1020 654916 : xfs_qm_dqget_next(
1021 : struct xfs_mount *mp,
1022 : xfs_dqid_t id,
1023 : xfs_dqtype_t type,
1024 : struct xfs_dquot **dqpp)
1025 : {
1026 654916 : struct xfs_dquot *dqp;
1027 654916 : int error = 0;
1028 :
1029 654916 : *dqpp = NULL;
1030 13220320 : for (; !error; error = xfs_dq_get_next_id(mp, type, &id)) {
1031 13217456 : error = xfs_qm_dqget(mp, id, type, false, &dqp);
1032 13217456 : if (error == -ENOENT)
1033 181938 : continue;
1034 13035518 : else if (error != 0)
1035 : break;
1036 :
1037 13035458 : if (!XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
1038 651992 : *dqpp = dqp;
1039 651992 : return 0;
1040 : }
1041 :
1042 12383466 : xfs_qm_dqput(dqp);
1043 : }
1044 :
1045 : return error;
1046 : }
1047 :
1048 : /*
1049 : * Release a reference to the dquot (decrement ref-count) and unlock it.
1050 : *
1051 : * If there is a group quota attached to this dquot, carefully release that
1052 : * too without tripping over deadlocks'n'stuff.
1053 : */
1054 : void
1055 311789063 : xfs_qm_dqput(
1056 : struct xfs_dquot *dqp)
1057 : {
1058 311789063 : ASSERT(dqp->q_nrefs > 0);
1059 311789063 : ASSERT(XFS_DQ_IS_LOCKED(dqp));
1060 :
1061 311841369 : trace_xfs_dqput(dqp);
1062 :
1063 311822241 : if (--dqp->q_nrefs == 0) {
1064 19376013 : struct xfs_quotainfo *qi = dqp->q_mount->m_quotainfo;
1065 19376013 : trace_xfs_dqput_free(dqp);
1066 :
1067 19375995 : if (list_lru_add(&qi->qi_lru, &dqp->q_lru))
1068 14163446 : XFS_STATS_INC(dqp->q_mount, xs_qm_dquot_unused);
1069 : }
1070 311822413 : xfs_dqunlock(dqp);
1071 312040456 : }
1072 :
1073 : /*
1074 : * Release a dquot. Flush it if dirty, then dqput() it.
1075 : * dquot must not be locked.
1076 : */
1077 : void
1078 521646697 : xfs_qm_dqrele(
1079 : struct xfs_dquot *dqp)
1080 : {
1081 521646697 : if (!dqp)
1082 : return;
1083 :
1084 298473232 : trace_xfs_dqrele(dqp);
1085 :
1086 298386200 : xfs_dqlock(dqp);
1087 : /*
1088 : * We don't care to flush it if the dquot is dirty here.
1089 : * That will create stutters that we want to avoid.
1090 : * Instead we do a delayed write when we try to reclaim
1091 : * a dirty dquot. Also xfs_sync will take part of the burden...
1092 : */
1093 298485238 : xfs_qm_dqput(dqp);
1094 : }
1095 :
1096 : /*
1097 : * This is the dquot flushing I/O completion routine. It is called
1098 : * from interrupt level when the buffer containing the dquot is
1099 : * flushed to disk. It is responsible for removing the dquot logitem
1100 : * from the AIL if it has not been re-logged, and unlocking the dquot's
1101 : * flush lock. This behavior is very similar to that of inodes..
1102 : */
1103 : static void
1104 11533268 : xfs_qm_dqflush_done(
1105 : struct xfs_log_item *lip)
1106 : {
1107 11533268 : struct xfs_dq_logitem *qip = (struct xfs_dq_logitem *)lip;
1108 11533268 : struct xfs_dquot *dqp = qip->qli_dquot;
1109 11533268 : struct xfs_ail *ailp = lip->li_ailp;
1110 11533268 : xfs_lsn_t tail_lsn;
1111 :
1112 : /*
1113 : * We only want to pull the item from the AIL if its
1114 : * location in the log has not changed since we started the flush.
1115 : * Thus, we only bother if the dquot's lsn has
1116 : * not changed. First we check the lsn outside the lock
1117 : * since it's cheaper, and then we recheck while
1118 : * holding the lock before removing the dquot from the AIL.
1119 : */
1120 23071494 : if (test_bit(XFS_LI_IN_AIL, &lip->li_flags) &&
1121 11511005 : ((lip->li_lsn == qip->qli_flush_lsn) ||
1122 0 : test_bit(XFS_LI_FAILED, &lip->li_flags))) {
1123 :
1124 11501089 : spin_lock(&ailp->ail_lock);
1125 11501089 : xfs_clear_li_failed(lip);
1126 11501089 : if (lip->li_lsn == qip->qli_flush_lsn) {
1127 : /* xfs_ail_update_finish() drops the AIL lock */
1128 11501089 : tail_lsn = xfs_ail_delete_one(ailp, lip);
1129 11501089 : xfs_ail_update_finish(ailp, tail_lsn);
1130 : } else {
1131 0 : spin_unlock(&ailp->ail_lock);
1132 : }
1133 : }
1134 :
1135 : /*
1136 : * Release the dq's flush lock since we're done with it.
1137 : */
1138 11533268 : xfs_dqfunlock(dqp);
1139 11533268 : }
1140 :
1141 : void
1142 10263687 : xfs_buf_dquot_iodone(
1143 : struct xfs_buf *bp)
1144 : {
1145 10263687 : struct xfs_log_item *lip, *n;
1146 :
1147 21796955 : list_for_each_entry_safe(lip, n, &bp->b_li_list, li_bio_list) {
1148 11533268 : list_del_init(&lip->li_bio_list);
1149 11533268 : xfs_qm_dqflush_done(lip);
1150 : }
1151 10263687 : }
1152 :
1153 : void
1154 108 : xfs_buf_dquot_io_fail(
1155 : struct xfs_buf *bp)
1156 : {
1157 108 : struct xfs_log_item *lip;
1158 :
1159 108 : spin_lock(&bp->b_mount->m_ail->ail_lock);
1160 216 : list_for_each_entry(lip, &bp->b_li_list, li_bio_list)
1161 108 : xfs_set_li_failed(lip, bp);
1162 108 : spin_unlock(&bp->b_mount->m_ail->ail_lock);
1163 108 : }
1164 :
1165 : /* Check incore dquot for errors before we flush. */
1166 : static xfs_failaddr_t
1167 11533267 : xfs_qm_dqflush_check(
1168 : struct xfs_dquot *dqp)
1169 : {
1170 11533267 : xfs_dqtype_t type = xfs_dquot_type(dqp);
1171 :
1172 11533267 : if (type != XFS_DQTYPE_USER &&
1173 11533267 : type != XFS_DQTYPE_GROUP &&
1174 : type != XFS_DQTYPE_PROJ)
1175 0 : return __this_address;
1176 :
1177 11533267 : if (dqp->q_id == 0)
1178 : return NULL;
1179 :
1180 11386108 : if (dqp->q_blk.softlimit && dqp->q_blk.count > dqp->q_blk.softlimit &&
1181 339 : !dqp->q_blk.timer)
1182 0 : return __this_address;
1183 :
1184 11386108 : if (dqp->q_ino.softlimit && dqp->q_ino.count > dqp->q_ino.softlimit &&
1185 406 : !dqp->q_ino.timer)
1186 0 : return __this_address;
1187 :
1188 11386108 : if (dqp->q_rtb.softlimit && dqp->q_rtb.count > dqp->q_rtb.softlimit &&
1189 0 : !dqp->q_rtb.timer)
1190 0 : return __this_address;
1191 :
1192 : /* bigtime flag should never be set on root dquots */
1193 11386108 : if (dqp->q_type & XFS_DQTYPE_BIGTIME) {
1194 11382274 : if (!xfs_has_bigtime(dqp->q_mount))
1195 0 : return __this_address;
1196 : if (dqp->q_id == 0)
1197 0 : return __this_address;
1198 : }
1199 :
1200 : return NULL;
1201 : }
1202 :
1203 : /*
1204 : * Write a modified dquot to disk.
1205 : * The dquot must be locked and the flush lock too taken by caller.
1206 : * The flush lock will not be unlocked until the dquot reaches the disk,
1207 : * but the dquot is free to be unlocked and modified by the caller
1208 : * in the interim. Dquot is still locked on return. This behavior is
1209 : * identical to that of inodes.
1210 : */
1211 : int
1212 13112524 : xfs_qm_dqflush(
1213 : struct xfs_dquot *dqp,
1214 : struct xfs_buf **bpp)
1215 : {
1216 13112524 : struct xfs_mount *mp = dqp->q_mount;
1217 13112524 : struct xfs_log_item *lip = &dqp->q_logitem.qli_item;
1218 13112524 : struct xfs_buf *bp;
1219 13112524 : struct xfs_dqblk *dqblk;
1220 13112524 : xfs_failaddr_t fa;
1221 13112524 : int error;
1222 :
1223 13112524 : ASSERT(XFS_DQ_IS_LOCKED(dqp));
1224 13112524 : ASSERT(!completion_done(&dqp->q_flush));
1225 :
1226 13112524 : trace_xfs_dqflush(dqp);
1227 :
1228 13112524 : *bpp = NULL;
1229 :
1230 13112524 : xfs_qm_dqunpin_wait(dqp);
1231 :
1232 : /*
1233 : * Get the buffer containing the on-disk dquot
1234 : */
1235 13112524 : error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno,
1236 13112524 : mp->m_quotainfo->qi_dqchunklen, XBF_TRYLOCK,
1237 : &bp, &xfs_dquot_buf_ops);
1238 13112524 : if (error == -EAGAIN)
1239 2410 : goto out_unlock;
1240 13110114 : if (error)
1241 1576846 : goto out_abort;
1242 :
1243 11533268 : fa = xfs_qm_dqflush_check(dqp);
1244 11533267 : if (fa) {
1245 0 : xfs_alert(mp, "corrupt dquot ID 0x%x in memory at %pS",
1246 : dqp->q_id, fa);
1247 0 : xfs_buf_relse(bp);
1248 0 : error = -EFSCORRUPTED;
1249 0 : goto out_abort;
1250 : }
1251 :
1252 : /* Flush the incore dquot to the ondisk buffer. */
1253 11533267 : dqblk = bp->b_addr + dqp->q_bufoffset;
1254 11533267 : xfs_dquot_to_disk(&dqblk->dd_diskdq, dqp);
1255 :
1256 : /*
1257 : * Clear the dirty field and remember the flush lsn for later use.
1258 : */
1259 11533267 : dqp->q_flags &= ~XFS_DQFLAG_DIRTY;
1260 :
1261 11533267 : xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn,
1262 : &dqp->q_logitem.qli_item.li_lsn);
1263 :
1264 : /*
1265 : * copy the lsn into the on-disk dquot now while we have the in memory
1266 : * dquot here. This can't be done later in the write verifier as we
1267 : * can't get access to the log item at that point in time.
1268 : *
1269 : * We also calculate the CRC here so that the on-disk dquot in the
1270 : * buffer always has a valid CRC. This ensures there is no possibility
1271 : * of a dquot without an up-to-date CRC getting to disk.
1272 : */
1273 11533267 : if (xfs_has_crc(mp)) {
1274 11533185 : dqblk->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
1275 11533185 : xfs_update_cksum((char *)dqblk, sizeof(struct xfs_dqblk),
1276 : XFS_DQUOT_CRC_OFF);
1277 : }
1278 :
1279 : /*
1280 : * Attach the dquot to the buffer so that we can remove this dquot from
1281 : * the AIL and release the flush lock once the dquot is synced to disk.
1282 : */
1283 11533268 : bp->b_flags |= _XBF_DQUOTS;
1284 11533268 : list_add_tail(&dqp->q_logitem.qli_item.li_bio_list, &bp->b_li_list);
1285 :
1286 : /*
1287 : * If the buffer is pinned then push on the log so we won't
1288 : * get stuck waiting in the write for too long.
1289 : */
1290 11533268 : if (xfs_buf_ispinned(bp)) {
1291 22481 : trace_xfs_dqflush_force(dqp);
1292 22481 : xfs_log_force(mp, 0);
1293 : }
1294 :
1295 11533268 : trace_xfs_dqflush_done(dqp);
1296 11533268 : *bpp = bp;
1297 11533268 : return 0;
1298 :
1299 1576846 : out_abort:
1300 1576846 : dqp->q_flags &= ~XFS_DQFLAG_DIRTY;
1301 1576846 : xfs_trans_ail_delete(lip, 0);
1302 1576846 : xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
1303 1579256 : out_unlock:
1304 1579256 : xfs_dqfunlock(dqp);
1305 1579256 : return error;
1306 : }
1307 :
1308 : /*
1309 : * Lock two xfs_dquot structures.
1310 : *
1311 : * To avoid deadlocks we always lock the quota structure with
1312 : * the lowerd id first.
1313 : */
1314 : void
1315 14711920 : xfs_dqlock2(
1316 : struct xfs_dquot *d1,
1317 : struct xfs_dquot *d2)
1318 : {
1319 14711920 : if (d1 && d2) {
1320 14711920 : ASSERT(d1 != d2);
1321 14711920 : if (d1->q_id > d2->q_id) {
1322 13532105 : mutex_lock(&d2->q_qlock);
1323 13574248 : mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED);
1324 : } else {
1325 1179815 : mutex_lock(&d1->q_qlock);
1326 1179821 : mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED);
1327 : }
1328 0 : } else if (d1) {
1329 0 : mutex_lock(&d1->q_qlock);
1330 0 : } else if (d2) {
1331 0 : mutex_lock(&d2->q_qlock);
1332 : }
1333 14754081 : }
1334 :
1335 : int __init
1336 50 : xfs_qm_init(void)
1337 : {
1338 50 : xfs_dquot_cache = kmem_cache_create("xfs_dquot",
1339 : sizeof(struct xfs_dquot),
1340 : 0, 0, NULL);
1341 50 : if (!xfs_dquot_cache)
1342 0 : goto out;
1343 :
1344 50 : xfs_dqtrx_cache = kmem_cache_create("xfs_dqtrx",
1345 : sizeof(struct xfs_dquot_acct),
1346 : 0, 0, NULL);
1347 50 : if (!xfs_dqtrx_cache)
1348 0 : goto out_free_dquot_cache;
1349 :
1350 : return 0;
1351 :
1352 : out_free_dquot_cache:
1353 0 : kmem_cache_destroy(xfs_dquot_cache);
1354 : out:
1355 : return -ENOMEM;
1356 : }
1357 :
1358 : void
1359 49 : xfs_qm_exit(void)
1360 : {
1361 49 : kmem_cache_destroy(xfs_dqtrx_cache);
1362 49 : kmem_cache_destroy(xfs_dquot_cache);
1363 49 : }
1364 :
1365 : /*
1366 : * Iterate every dquot of a particular type. The caller must ensure that the
1367 : * particular quota type is active. iter_fn can return negative error codes,
1368 : * or -ECANCELED to indicate that it wants to stop iterating.
1369 : */
1370 : int
1371 349155 : xfs_qm_dqiterate(
1372 : struct xfs_mount *mp,
1373 : xfs_dqtype_t type,
1374 : xfs_qm_dqiterate_fn iter_fn,
1375 : void *priv)
1376 : {
1377 349155 : struct xfs_dquot *dq;
1378 349155 : xfs_dqid_t id = 0;
1379 349155 : int error;
1380 :
1381 349155 : do {
1382 349155 : error = xfs_qm_dqget_next(mp, id, type, &dq);
1383 349155 : if (error == -ENOENT)
1384 : return 0;
1385 349155 : if (error)
1386 0 : return error;
1387 :
1388 349155 : error = iter_fn(dq, type, priv);
1389 349155 : id = dq->q_id;
1390 349155 : xfs_qm_dqput(dq);
1391 349155 : } while (error == 0 && id != 0);
1392 :
1393 : return error;
1394 : }
|
