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18#include "xfs.h"
19#include "xfs_bmap_btree.h"
20#include "xfs_inum.h"
21#include "xfs_dir2.h"
22#include "xfs_dir2_sf.h"
23#include "xfs_attr_sf.h"
24#include "xfs_dinode.h"
25#include "xfs_inode.h"
26#include "xfs_ag.h"
27#include "xfs_dmapi.h"
28#include "xfs_log.h"
29#include "xfs_trans.h"
30#include "xfs_sb.h"
31#include "xfs_mount.h"
32#include "xfs_bmap.h"
33#include "xfs_alloc.h"
34#include "xfs_utils.h"
35#include "xfs_mru_cache.h"
36#include "xfs_filestream.h"
37
38#ifdef XFS_FILESTREAMS_TRACE
39
40ktrace_t *xfs_filestreams_trace_buf;
41
42STATIC void
43xfs_filestreams_trace(
44 xfs_mount_t *mp,
45 int type,
46 const char *func,
47 int line,
48 __psunsigned_t arg0,
49 __psunsigned_t arg1,
50 __psunsigned_t arg2,
51 __psunsigned_t arg3,
52 __psunsigned_t arg4,
53 __psunsigned_t arg5)
54{
55 ktrace_enter(xfs_filestreams_trace_buf,
56 (void *)(__psint_t)(type | (line << 16)),
57 (void *)func,
58 (void *)(__psunsigned_t)current_pid(),
59 (void *)mp,
60 (void *)(__psunsigned_t)arg0,
61 (void *)(__psunsigned_t)arg1,
62 (void *)(__psunsigned_t)arg2,
63 (void *)(__psunsigned_t)arg3,
64 (void *)(__psunsigned_t)arg4,
65 (void *)(__psunsigned_t)arg5,
66 NULL, NULL, NULL, NULL, NULL, NULL);
67}
68
69#define TRACE0(mp,t) TRACE6(mp,t,0,0,0,0,0,0)
70#define TRACE1(mp,t,a0) TRACE6(mp,t,a0,0,0,0,0,0)
71#define TRACE2(mp,t,a0,a1) TRACE6(mp,t,a0,a1,0,0,0,0)
72#define TRACE3(mp,t,a0,a1,a2) TRACE6(mp,t,a0,a1,a2,0,0,0)
73#define TRACE4(mp,t,a0,a1,a2,a3) TRACE6(mp,t,a0,a1,a2,a3,0,0)
74#define TRACE5(mp,t,a0,a1,a2,a3,a4) TRACE6(mp,t,a0,a1,a2,a3,a4,0)
75#define TRACE6(mp,t,a0,a1,a2,a3,a4,a5) \
76 xfs_filestreams_trace(mp, t, __FUNCTION__, __LINE__, \
77 (__psunsigned_t)a0, (__psunsigned_t)a1, \
78 (__psunsigned_t)a2, (__psunsigned_t)a3, \
79 (__psunsigned_t)a4, (__psunsigned_t)a5)
80
81#define TRACE_AG_SCAN(mp, ag, ag2) \
82 TRACE2(mp, XFS_FSTRM_KTRACE_AGSCAN, ag, ag2);
83#define TRACE_AG_PICK1(mp, max_ag, maxfree) \
84 TRACE2(mp, XFS_FSTRM_KTRACE_AGPICK1, max_ag, maxfree);
85#define TRACE_AG_PICK2(mp, ag, ag2, cnt, free, scan, flag) \
86 TRACE6(mp, XFS_FSTRM_KTRACE_AGPICK2, ag, ag2, \
87 cnt, free, scan, flag)
88#define TRACE_UPDATE(mp, ip, ag, cnt, ag2, cnt2) \
89 TRACE5(mp, XFS_FSTRM_KTRACE_UPDATE, ip, ag, cnt, ag2, cnt2)
90#define TRACE_FREE(mp, ip, pip, ag, cnt) \
91 TRACE4(mp, XFS_FSTRM_KTRACE_FREE, ip, pip, ag, cnt)
92#define TRACE_LOOKUP(mp, ip, pip, ag, cnt) \
93 TRACE4(mp, XFS_FSTRM_KTRACE_ITEM_LOOKUP, ip, pip, ag, cnt)
94#define TRACE_ASSOCIATE(mp, ip, pip, ag, cnt) \
95 TRACE4(mp, XFS_FSTRM_KTRACE_ASSOCIATE, ip, pip, ag, cnt)
96#define TRACE_MOVEAG(mp, ip, pip, oag, ocnt, nag, ncnt) \
97 TRACE6(mp, XFS_FSTRM_KTRACE_MOVEAG, ip, pip, oag, ocnt, nag, ncnt)
98#define TRACE_ORPHAN(mp, ip, ag) \
99 TRACE2(mp, XFS_FSTRM_KTRACE_ORPHAN, ip, ag);
100
101
102#else
103#define TRACE_AG_SCAN(mp, ag, ag2)
104#define TRACE_AG_PICK1(mp, max_ag, maxfree)
105#define TRACE_AG_PICK2(mp, ag, ag2, cnt, free, scan, flag)
106#define TRACE_UPDATE(mp, ip, ag, cnt, ag2, cnt2)
107#define TRACE_FREE(mp, ip, pip, ag, cnt)
108#define TRACE_LOOKUP(mp, ip, pip, ag, cnt)
109#define TRACE_ASSOCIATE(mp, ip, pip, ag, cnt)
110#define TRACE_MOVEAG(mp, ip, pip, oag, ocnt, nag, ncnt)
111#define TRACE_ORPHAN(mp, ip, ag)
112#endif
113
114static kmem_zone_t *item_zone;
115
116
117
118
119
120
121
122typedef struct fstrm_item
123{
124 xfs_agnumber_t ag;
125 xfs_inode_t *ip;
126 xfs_inode_t *pip;
127} fstrm_item_t;
128
129
130
131
132
133
134static int
135_xfs_filestream_pick_ag(
136 xfs_mount_t *mp,
137 xfs_agnumber_t startag,
138 xfs_agnumber_t *agp,
139 int flags,
140 xfs_extlen_t minlen)
141{
142 int err, trylock, nscan;
143 xfs_extlen_t delta, longest, need, free, minfree, maxfree = 0;
144 xfs_agnumber_t ag, max_ag = NULLAGNUMBER;
145 struct xfs_perag *pag;
146
147
148 minfree = mp->m_sb.sb_agblocks / 50;
149
150 ag = startag;
151 *agp = NULLAGNUMBER;
152
153
154 trylock = XFS_ALLOC_FLAG_TRYLOCK;
155
156 for (nscan = 0; 1; nscan++) {
157
158 TRACE_AG_SCAN(mp, ag, xfs_filestream_peek_ag(mp, ag));
159
160 pag = mp->m_perag + ag;
161
162 if (!pag->pagf_init) {
163 err = xfs_alloc_pagf_init(mp, NULL, ag, trylock);
164 if (err && !trylock)
165 return err;
166 }
167
168
169 if (!pag->pagf_init)
170 goto next_ag;
171
172
173 if (pag->pagf_freeblks > maxfree) {
174 maxfree = pag->pagf_freeblks;
175 max_ag = ag;
176 }
177
178
179
180
181
182
183
184 if (xfs_filestream_get_ag(mp, ag) > 1) {
185 xfs_filestream_put_ag(mp, ag);
186 goto next_ag;
187 }
188
189 need = XFS_MIN_FREELIST_PAG(pag, mp);
190 delta = need > pag->pagf_flcount ? need - pag->pagf_flcount : 0;
191 longest = (pag->pagf_longest > delta) ?
192 (pag->pagf_longest - delta) :
193 (pag->pagf_flcount > 0 || pag->pagf_longest > 0);
194
195 if (((minlen && longest >= minlen) ||
196 (!minlen && pag->pagf_freeblks >= minfree)) &&
197 (!pag->pagf_metadata || !(flags & XFS_PICK_USERDATA) ||
198 (flags & XFS_PICK_LOWSPACE))) {
199
200
201 free = pag->pagf_freeblks;
202 *agp = ag;
203 break;
204 }
205
206
207 xfs_filestream_put_ag(mp, ag);
208next_ag:
209
210 if (++ag >= mp->m_sb.sb_agcount)
211 ag = 0;
212
213
214 if (ag != startag)
215 continue;
216
217
218 if (trylock != 0) {
219 trylock = 0;
220 continue;
221 }
222
223
224 if (!(flags & XFS_PICK_LOWSPACE)) {
225 flags |= XFS_PICK_LOWSPACE;
226 continue;
227 }
228
229
230
231
232
233 if (max_ag != NULLAGNUMBER) {
234 xfs_filestream_get_ag(mp, max_ag);
235 TRACE_AG_PICK1(mp, max_ag, maxfree);
236 free = maxfree;
237 *agp = max_ag;
238 break;
239 }
240
241
242 TRACE_AG_PICK1(mp, max_ag, maxfree);
243 *agp = 0;
244 return 0;
245 }
246
247 TRACE_AG_PICK2(mp, startag, *agp, xfs_filestream_peek_ag(mp, *agp),
248 free, nscan, flags);
249
250 return 0;
251}
252
253
254
255
256
257
258static int
259_xfs_filestream_update_ag(
260 xfs_inode_t *ip,
261 xfs_inode_t *pip,
262 xfs_agnumber_t ag)
263{
264 int err = 0;
265 xfs_mount_t *mp;
266 xfs_mru_cache_t *cache;
267 fstrm_item_t *item;
268 xfs_agnumber_t old_ag;
269 xfs_inode_t *old_pip;
270
271
272
273
274
275 ASSERT(ip && (((ip->i_d.di_mode & S_IFREG) && pip &&
276 (pip->i_d.di_mode & S_IFDIR)) ||
277 ((ip->i_d.di_mode & S_IFDIR) && !pip)));
278
279 mp = ip->i_mount;
280 cache = mp->m_filestream;
281
282 item = xfs_mru_cache_lookup(cache, ip->i_ino);
283 if (item) {
284 ASSERT(item->ip == ip);
285 old_ag = item->ag;
286 item->ag = ag;
287 old_pip = item->pip;
288 item->pip = pip;
289 xfs_mru_cache_done(cache);
290
291
292
293
294
295 if (ag != old_ag) {
296 xfs_filestream_put_ag(mp, old_ag);
297 xfs_filestream_get_ag(mp, ag);
298 }
299
300
301
302
303
304 if (pip && pip != old_pip) {
305 IRELE(old_pip);
306 IHOLD(pip);
307 }
308
309 TRACE_UPDATE(mp, ip, old_ag, xfs_filestream_peek_ag(mp, old_ag),
310 ag, xfs_filestream_peek_ag(mp, ag));
311 return 0;
312 }
313
314 item = kmem_zone_zalloc(item_zone, KM_MAYFAIL);
315 if (!item)
316 return ENOMEM;
317
318 item->ag = ag;
319 item->ip = ip;
320 item->pip = pip;
321
322 err = xfs_mru_cache_insert(cache, ip->i_ino, item);
323 if (err) {
324 kmem_zone_free(item_zone, item);
325 return err;
326 }
327
328
329 xfs_filestream_get_ag(mp, ag);
330
331
332
333
334
335 IHOLD(ip);
336
337
338
339
340
341 if (pip)
342 IHOLD(pip);
343
344 TRACE_UPDATE(mp, ip, ag, xfs_filestream_peek_ag(mp, ag),
345 ag, xfs_filestream_peek_ag(mp, ag));
346
347 return 0;
348}
349
350
351void
352xfs_fstrm_free_func(
353 unsigned long ino,
354 void *data)
355{
356 fstrm_item_t *item = (fstrm_item_t *)data;
357 xfs_inode_t *ip = item->ip;
358 int ref;
359
360 ASSERT(ip->i_ino == ino);
361
362 xfs_iflags_clear(ip, XFS_IFILESTREAM);
363
364
365 ref = xfs_filestream_put_ag(ip->i_mount, item->ag);
366
367 ASSERT(ref >= 0);
368 TRACE_FREE(ip->i_mount, ip, item->pip, item->ag,
369 xfs_filestream_peek_ag(ip->i_mount, item->ag));
370
371
372
373
374
375
376
377
378 IRELE(ip);
379
380
381
382
383
384
385 if (item->pip)
386 IRELE(item->pip);
387
388
389 kmem_zone_free(item_zone, item);
390}
391
392
393
394
395
396int
397xfs_filestream_init(void)
398{
399 item_zone = kmem_zone_init(sizeof(fstrm_item_t), "fstrm_item");
400#ifdef XFS_FILESTREAMS_TRACE
401 xfs_filestreams_trace_buf = ktrace_alloc(XFS_FSTRM_KTRACE_SIZE, KM_SLEEP);
402#endif
403 return item_zone ? 0 : -ENOMEM;
404}
405
406
407
408
409
410void
411xfs_filestream_uninit(void)
412{
413#ifdef XFS_FILESTREAMS_TRACE
414 ktrace_free(xfs_filestreams_trace_buf);
415#endif
416 kmem_zone_destroy(item_zone);
417}
418
419
420
421
422
423
424int
425xfs_filestream_mount(
426 xfs_mount_t *mp)
427{
428 int err;
429 unsigned int lifetime, grp_count;
430
431
432
433
434
435
436
437
438 lifetime = xfs_fstrm_centisecs * 10;
439 grp_count = 10;
440
441 err = xfs_mru_cache_create(&mp->m_filestream, lifetime, grp_count,
442 xfs_fstrm_free_func);
443
444 return err;
445}
446
447
448
449
450
451
452
453void
454xfs_filestream_unmount(
455 xfs_mount_t *mp)
456{
457 xfs_mru_cache_destroy(mp->m_filestream);
458}
459
460
461
462
463
464
465
466
467void
468xfs_filestream_flush(
469 xfs_mount_t *mp)
470{
471 xfs_mru_cache_flush(mp->m_filestream);
472}
473
474
475
476
477
478xfs_agnumber_t
479xfs_filestream_lookup_ag(
480 xfs_inode_t *ip)
481{
482 xfs_mru_cache_t *cache;
483 fstrm_item_t *item;
484 xfs_agnumber_t ag;
485 int ref;
486
487 if (!(ip->i_d.di_mode & (S_IFREG | S_IFDIR))) {
488 ASSERT(0);
489 return NULLAGNUMBER;
490 }
491
492 cache = ip->i_mount->m_filestream;
493 item = xfs_mru_cache_lookup(cache, ip->i_ino);
494 if (!item) {
495 TRACE_LOOKUP(ip->i_mount, ip, NULL, NULLAGNUMBER, 0);
496 return NULLAGNUMBER;
497 }
498
499 ASSERT(ip == item->ip);
500 ag = item->ag;
501 ref = xfs_filestream_peek_ag(ip->i_mount, ag);
502 xfs_mru_cache_done(cache);
503
504 TRACE_LOOKUP(ip->i_mount, ip, item->pip, ag, ref);
505 return ag;
506}
507
508
509
510
511
512
513
514
515
516
517
518int
519xfs_filestream_associate(
520 xfs_inode_t *pip,
521 xfs_inode_t *ip)
522{
523 xfs_mount_t *mp;
524 xfs_mru_cache_t *cache;
525 fstrm_item_t *item;
526 xfs_agnumber_t ag, rotorstep, startag;
527 int err = 0;
528
529 ASSERT(pip->i_d.di_mode & S_IFDIR);
530 ASSERT(ip->i_d.di_mode & S_IFREG);
531 if (!(pip->i_d.di_mode & S_IFDIR) || !(ip->i_d.di_mode & S_IFREG))
532 return -EINVAL;
533
534 mp = pip->i_mount;
535 cache = mp->m_filestream;
536 down_read(&mp->m_peraglock);
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555 if (!xfs_ilock_nowait(pip, XFS_IOLOCK_EXCL)) {
556 up_read(&mp->m_peraglock);
557 return 1;
558 }
559
560
561 item = xfs_mru_cache_lookup(cache, pip->i_ino);
562 if (item) {
563 ASSERT(item->ip == pip);
564 ag = item->ag;
565 xfs_mru_cache_done(cache);
566
567 TRACE_LOOKUP(mp, pip, pip, ag, xfs_filestream_peek_ag(mp, ag));
568 err = _xfs_filestream_update_ag(ip, pip, ag);
569
570 goto exit;
571 }
572
573
574
575
576
577 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
578 rotorstep = xfs_rotorstep;
579 startag = (mp->m_agfrotor / rotorstep) % mp->m_sb.sb_agcount;
580 mp->m_agfrotor = (mp->m_agfrotor + 1) %
581 (mp->m_sb.sb_agcount * rotorstep);
582 } else
583 startag = XFS_INO_TO_AGNO(mp, pip->i_ino);
584
585
586 err = _xfs_filestream_pick_ag(mp, startag, &ag, 0, 0);
587 if (err || ag == NULLAGNUMBER)
588 goto exit_did_pick;
589
590
591 err = _xfs_filestream_update_ag(pip, NULL, ag);
592 if (err)
593 goto exit_did_pick;
594
595
596 err = _xfs_filestream_update_ag(ip, pip, ag);
597 if (err)
598 goto exit_did_pick;
599
600 TRACE_ASSOCIATE(mp, ip, pip, ag, xfs_filestream_peek_ag(mp, ag));
601
602exit_did_pick:
603
604
605
606
607
608 if (ag != NULLAGNUMBER)
609 xfs_filestream_put_ag(mp, ag);
610
611exit:
612 xfs_iunlock(pip, XFS_IOLOCK_EXCL);
613 up_read(&mp->m_peraglock);
614 return -err;
615}
616
617
618
619
620
621
622int
623xfs_filestream_new_ag(
624 xfs_bmalloca_t *ap,
625 xfs_agnumber_t *agp)
626{
627 int flags, err;
628 xfs_inode_t *ip, *pip = NULL;
629 xfs_mount_t *mp;
630 xfs_mru_cache_t *cache;
631 xfs_extlen_t minlen;
632 fstrm_item_t *dir, *file;
633 xfs_agnumber_t ag = NULLAGNUMBER;
634
635 ip = ap->ip;
636 mp = ip->i_mount;
637 cache = mp->m_filestream;
638 minlen = ap->alen;
639 *agp = NULLAGNUMBER;
640
641
642
643
644
645 file = xfs_mru_cache_remove(cache, ip->i_ino);
646 if (file) {
647 ASSERT(ip == file->ip);
648
649
650 pip = file->pip;
651 ag = file->ag;
652
653
654 dir = xfs_mru_cache_lookup(cache, pip->i_ino);
655 if (dir) {
656 ASSERT(pip == dir->ip);
657
658
659
660
661
662
663
664 if (dir->ag != file->ag) {
665 xfs_filestream_put_ag(mp, file->ag);
666 xfs_filestream_get_ag(mp, dir->ag);
667 *agp = file->ag = dir->ag;
668 }
669
670 xfs_mru_cache_done(cache);
671 }
672
673
674
675
676
677
678 err = xfs_mru_cache_insert(cache, ip->i_ino, file);
679 if (err) {
680 xfs_fstrm_free_func(ip->i_ino, file);
681 return err;
682 }
683
684
685
686
687
688 if (*agp != NULLAGNUMBER) {
689 TRACE_MOVEAG(mp, ip, pip,
690 ag, xfs_filestream_peek_ag(mp, ag),
691 *agp, xfs_filestream_peek_ag(mp, *agp));
692 return 0;
693 }
694 }
695
696
697
698
699
700
701 if (pip)
702 xfs_ilock(pip, XFS_IOLOCK_EXCL);
703
704
705
706
707
708
709 ag = (ag == NULLAGNUMBER) ? 0 : (ag + 1) % mp->m_sb.sb_agcount;
710 flags = (ap->userdata ? XFS_PICK_USERDATA : 0) |
711 (ap->low ? XFS_PICK_LOWSPACE : 0);
712
713 err = _xfs_filestream_pick_ag(mp, ag, agp, flags, minlen);
714 if (err || *agp == NULLAGNUMBER)
715 goto exit;
716
717
718
719
720
721
722
723
724
725 if (!pip) {
726 TRACE_ORPHAN(mp, ip, *agp);
727 goto exit;
728 }
729
730
731 err = _xfs_filestream_update_ag(pip, NULL, *agp);
732 if (err)
733 goto exit;
734
735
736 err = _xfs_filestream_update_ag(ip, pip, *agp);
737 if (err)
738 goto exit;
739
740 TRACE_MOVEAG(mp, ip, pip, NULLAGNUMBER, 0,
741 *agp, xfs_filestream_peek_ag(mp, *agp));
742
743exit:
744
745
746
747
748
749 if (*agp != NULLAGNUMBER)
750 xfs_filestream_put_ag(mp, *agp);
751 else
752 *agp = 0;
753
754 if (pip)
755 xfs_iunlock(pip, XFS_IOLOCK_EXCL);
756
757 return err;
758}
759
760
761
762
763
764void
765xfs_filestream_deassociate(
766 xfs_inode_t *ip)
767{
768 xfs_mru_cache_t *cache = ip->i_mount->m_filestream;
769
770 xfs_mru_cache_delete(cache, ip->i_ino);
771}
772